FOLDING CHAIR

A folding chair, having a chair frame consisting of a foldable frame. A first front connecting rod of the foldable frame has one end rotatably connected to a front supporting seat, and another end rotatably connected to one end of a front folding seat; a second front connecting rod of the foldable frame has one end rotatably connected to another front supporting seat, and another end fixedly connected to another end of the front folding seat; similar connecting structures are present between a first rear connecting rod, two rear supporting seats, a rear folding seat, and a second rear connecting rod. A first locking mechanism is provided between the first front connecting rod and the front folding seat, and a second locking mechanism is provided between the first rear connecting rod and the rear folding seat.

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Description
BACKGROUND OF THE INVENTION

The present utility model relates to the technical field of chairs, and in particular, to a folding chair.

Chinese utility model patent CN217090067U discloses a portable middle-folding dual-purpose chair, including a chair surface and a chair seat. The chair seat includes a supporting rod group, a connecting rod group, U-shaped connecting pieces, four-corner connecting pieces, and fixing pieces. The connecting rod group includes long connecting rods and short connecting rods. Two ends of each long connecting rod are plugged into two corresponding four-corner connecting pieces respectively. One end of each short connecting rod is rotatably connected to a corresponding four-corner connecting piece, and another end of the short connecting rod is rotatably connected to a corresponding U-shaped connecting piece. To fold the chair, two U-shaped connecting pieces are pushed inwardly towards each other so that the short connecting rods are driven to rotate towards each other and thus drive the long connecting rods on two sides to move towards each other, thereby folding up the connecting rod group.

However, when the connecting rod group described above is unfolded for use, the rotatable connection between each short connecting rod and a corresponding U-shaped connecting piece is not dead locked. This causes the connecting rod group to be easily rotated by an external force during use of the chair, thereby causing an unexpected folding operation, which poses a potential safety hazard. The stability of the chair needs to be improved.

BRIEF SUMMARY OF THE INVENTION

The present utility model aims to overcome the defects in the prior art and provide a folding chair with high stability and good safety.

The present utility model is achieved by the following technical scheme:

A folding chair, comprising a chair frame and a chair surface; the chair frame comprises a foldable frame, an upper supporting rod assembly and a lower supporting rod assembly; the upper supporting rod assembly is removably mounted to an upper side of the foldable frame, and the lower supporting rod assembly is removably mounted to a lower side of the foldable frame; the chair surface is removably mounted to an upper side of the upper supporting rod assembly; wherein the foldable frame comprises two front supporting seats, two rear supporting seats, two side connecting rods, a first front connecting rod, a second front connecting rod, a front folding seat, a first rear connecting rod, a second rear connecting rod, and a rear folding seat; one end of each of the two side connecting rods is fixedly connected to a corresponding rear supporting seat of the two rear supporting seats, and another end of each of the two side connecting rods is fixedly connected to a corresponding front supporting seat of the two front supporting seats; the front folding seat is located between the two front supporting seats; one end of the first front connecting rod is rotatably connected to one of the front supporting seats so as to be rotatable on a horizontal plane, and another end of the first front connecting rod is rotatably connected to one end of the front folding seat so as to be rotatable on the horizontal plane; one end of the second front connecting rod is rotatably connected to another one of the other front supporting seats so as to be rotatable on the horizontal plane, and another end of the second front connecting rod is fixedly connected to another end of the front folding seat; the rear folding seat is located between the two rear supporting seats; one end of the first rear connecting rod is rotatably connected to one of the rear supporting seats so as to be rotated on another horizontal plane, and another end of the first rear connecting rod is rotatably connected to one end of the rear folding seat so as to be rotatable on said another horizontal plane; one end of the second rear connecting rod is rotatably connected to another one of the rear supporting seats so as to be rotated along said another horizontal plane, and another end of the second rear connecting rod is fixedly connected to another end of the rear folding seat; a first locking mechanism is provided between the first front connecting rod and the front folding seat, and a second locking mechanism is provided between the first rear connecting rod and the rear folding seat; when the foldable frame is in an unfolded state, the first locking mechanism is operable to achieve a locked condition where the first front connecting rod and the front folding seat are locked together, and the second locking mechanism is operable to achieve a locked condition where the first rear connecting rod and the rear folding seat are locked together; when the first locking mechanism and the second locking mechanism are unlocked, the front folding seat and the rear folding seat are allowed to be pushed horizontally and inwardly to fold the foldable frame.

Further, the front folding seat, the first front connecting rod, and the second front connecting rod, considered collectively as a whole, are not positioned at a same height in the foldable frame as compared with the rear folding seat, the first rear connecting rod, and the second rear connecting rod, considered collectively as a whole, so that when the foldable frame is in a folded state, the front folding seat, the first front connecting rod, and the second front connecting rod, considered collectively as a whole, and the rear folding seat, the first rear connecting rod, and the second rear connecting rod, considered collectively as a whole, are positioned at different heights without interfering with each other.

Further, the two front supporting seats and the two rear supporting seats are arranged at four corners of the foldable frame which is formed to have a horizontal rectangular shape; the first front connecting rod and the first rear connecting rod are arranged opposite to each other along a front-rear direction of the foldable frame, and the second front connecting rod and the second rear connecting rod are also arranged opposite to each other along the front-rear direction of the foldable frame.

Further, the first locking mechanism comprises a first elastic self-locking piece arranged on the first front connecting rod, and a first locking hole arranged on the front folding seat; the second locking mechanism comprises a second elastic self-locking piece arranged on the first rear connecting rod, and a second locking hole arranged on the rear folding seat; when the foldable frame is in the unfolded state, the first elastic self-locking piece is automatically plugged into the first locking hole to lock the first front connecting rod with the front folding seat, and the second elastic self-locking piece is automatically plugged into the second locking hole to lock the first rear connecting rod with the rear folding seat; the front folding seat is further provided with a first unlocking member; the rear folding seat is further provided with a second unlocking member; the first elastic self-locking piece is separated from the first locking hole when the first unlocking member is pressed, and the second elastic self-locking piece is separated from the second locking hole when the second unlocking member is pressed.

Further, the front folding seat is provided with a first open slot penetrating through the front folding seat along a left-right direction of the foldable frame, and opened towards a front direction of the foldable frame; said another end of the first front connecting rod extends into the first open slot from said one end of the front folding seat and is rotatably connected to an upper slot wall and a lower slot wall of the first open slot through a first pin shaft; said another end of the second front connecting rod extends into the first open slot from said another end of the front folding seat and is fixedly connected to the upper slot wall and the lower slot wall of the first open slot through at least one second pin shaft; the rear folding seat is provided with a second open slot penetrating through the rear folding seat along the left-right direction of the foldable frame, and opened towards a rear direction of the foldable frame; said another end of the first rear connecting rod extends into the second open slot from said one end of the rear folding seat and is rotatably connected to an upper slot wall and a lower slot wall of the second open slot through a third pin shaft; and said another end of the second rear connecting rod extends into the second open slot from said another end of the rear folding seat and is fixedly connected to the upper slot wall and the lower slot wall of the second open slot through at least one fourth pin shaft.

Further, distances from a rotatable connection position between the first front connecting rod and the front folding seat to the two front supporting seats respectively are equal, and the rotatable connection position between the first front connecting rod and the front folding seat is located more frontal along a front-rear direction of the foldable frame than a fixed connection position or fixed connection positions between the second front connecting rod and the front folding seat; distances from a rotatable connection position between the first rear connecting rod and the rear folding seat to the two rear supporting seats respectively are equal, and the rotatable connection position between the first rear connecting rod and the rear folding seat is located more rearward along the front-rear direction of the foldable frame than a fixed connection position or fixed connection positions between the second rear connecting rod and the rear folding seat.

Further, said another end of the first front connecting rod extending into the first open slot is fixedly provided with a first rotating joint; one end of the first rotating joint away from the first front connecting rod is rotatably connected to frontal positions at a middle of the upper slot wall and the lower slot wall of the first open slot through the first pin shaft; said another end of the first rear connecting rod extending into the second open slot is fixedly provided with a second rotating joint; and one end of the second rotating joint away from the first rear connecting rod is rotatably connected to rear positions at a middle of the upper slot wall and the lower slot wall of the second open slot through the third pin shaft.

Further, the first locking hole is arranged through the upper slot wall of the first open slot; one end of the first unlocking member movably extends into the first locking hole to be in abutting fit with a plugging end of the first elastic self-locking piece; another end of the first unlocking member is exposed from an upper side of the front folding seat to define a pressing end of the first unlocking member; the second locking hole is arranged through the lower slot wall of the second open slot; one end of the second unlocking member movably extends into the second locking hole to be in abutting fit with a plugging end of the second elastic self-locking piece, and another end of the second unlocking member is exposed from a lower side of the rear folding seat to define a pressing end of the second unlocking member.

Further, a first inclined guiding port located right in front of the first locking hole is arranged on the upper slot wall of the first open slot; the first inclined guiding port guides the plugging end of the first elastic self-locking piece into the first open slot and into the first locking hole when the foldable frame is unfolded; a second inclined guiding port located right behind the second locking hole is arranged on the lower slot wall of the second open slot; and the second inclined guiding port guides the plugging end of the second elastic self-locking piece into the second open slot and into the second locking hole when the foldable frame is unfolded.

Further, the first elastic self-locking piece comprises a first self-locking ball pin and a first spring; the first self-locking ball pin and the first spring are both mounted in the first front connecting rod; a first exposing hole from which the first self-locking ball pin is exposed is formed on a wall of the first front connecting rod; the first spring biases the first self-locking ball pin to expose from the first exposing hole; the second elastic self-locking piece comprises a second self-locking ball pin and a second spring; the second self-locking ball pin and the second spring are both mounted in the first rear connecting rod; a second exposing hole from which the second self-locking ball pin is exposed is formed on a wall of the first rear connecting rod; the second spring biases the second self-locking ball pin to expose from the second exposing hole.

Compared with the prior art, the present utility model has the following beneficial effects:

When a foldable frame of the present utility model is unfolded for use, connection between the first front connecting rod and the front folding seat as well as the connection between the first rear connecting rod and the rear folding seat are in fact locked by the first locking mechanism and the second locking mechanism respectively, so that accidental folding of the folding chair during use can be prevented, and the folding chair has various advantages such as good stability and high safety. Further, among the two front connecting rods and the two rear connecting rods, only the first front connecting rod and the first rear connecting rod are respectively rotatably connected to the front folding seat and the rear folding seat, while the second front connecting rod and the second rear connecting rod are respectively fixedly connected to the front folding seat and the rear folding seat. In this way, the structural design of the locking mechanisms can be simplified, and the unlocking operation during folding is facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall perspective view of a folding chair of the present utility model.

FIG. 2 is a front perspective view of a chair frame of the present utility model.

FIG. 3 is a front view of the chair frame of the present utility model.

FIG. 4 is a perspective view illustrating an unfolded state of a foldable frame of the present utility model.

FIG. 5 is a schematic top view of connection state of a first front connecting rod and a second front connecting rod connected to a front folding seat according to the present utility model.

FIG. 6 is a schematic cross-sectional view of E-E of FIG. 5.

FIG. 7 is a schematic exploded view of a connection state of a first front connecting rod and a second front connecting rod connected to a front folding seat according to the present utility model.

FIG. 8 is a schematic exploded view of connection state of a first front connecting rod connected to a front folding seat according to the present utility model.

FIG. 9 is a schematic top view of a connection state of a first rear connecting rod and a second rear connecting rod connected to a rear folding seat according to the present utility model.

FIG. 10 is a schematic cross-sectional view of F-F of FIG. 9.

FIG. 11 is a schematic exploded view of a connection state of a first rear connecting rod connected to a rear folding seat according to the present utility model.

FIG. 12 is a schematic diagram illustrating a folded state of a foldable frame according to the present utility model.

FIG. 13 is a schematic diagram of a folded state of the folding chair according to the present utility model.

 DETAILED DESCRIPTION OF THE INVENTION

The present utility model will be described in further detail with reference to the following embodiments given in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 13, a folding chair provided by the present utility model, comprising a chair frame 1 and a chair surface 2, wherein the chair frame 1 comprises a foldable frame 3, an upper supporting rod assembly 4 and a lower supporting rod assembly 5.

The foldable frame 3 comprises two front supporting seats 31, two rear supporting seats 32, two side connecting rods 33, a first front connecting rod 34, a second front connecting rod 35, a front folding seat 36, a first rear connecting rod 37, a second rear connecting rod 38, and a rear folding seat 39. The two front supporting seats 31 and the two rear supporting seats 32 are arranged at four corners of the foldable frame which is formed to have a substantially horizontal rectangular shape; one end of each of the two side connecting rods 33 is fixedly connected to a corresponding rear supporting seat of the two rear supporting seats 32, and another end of each of the two side connecting rods 33 is fixedly connected to a corresponding front supporting seat of the two front supporting seats 31. The front folding seat 36 is located between the two front supporting seats 31; one end of the first front connecting rod 34 is rotatably connected to one of the front supporting seats 31 so as to be rotatable on a horizontal plane, and another end of the first front connecting rod 34 is rotatably connected to one end of the front folding seat 36 so as to be rotatable on the horizontal plane; one end of the second front connecting rod 35 is rotatably connected to another one of the other front supporting seats 31 so as to be rotatable on the horizontal plane, and another end of the second front connecting rod 35 is fixedly connected to another end of the front folding seat 36. The rear folding seat 39 is located between the two rear supporting seats 32; one end of the first rear connecting rod 37 is rotatably connected to one of the rear supporting seats 32 so as to be rotatable on another horizontal plane, and another end of the first rear connecting rod 37 is rotatably connected to one end of the rear folding seat 39 so as to be rotatable on said another horizontal plane; one end of the second rear connecting rod 38 is rotatably connected to another one of the rear supporting seats 32 so as to be rotatable on said another horizontal plane, and another end of the second rear connecting rod 38 is fixedly connected to another end of the rear folding seat 39.

A first locking mechanism 6 is provided between the first front connecting rod 34 and the front folding seat 36, and a second locking mechanism 7 is provided between the first rear connecting rod 37 and the rear folding seat 39. When the foldable frame 3 is in an unfolded state, the first locking mechanism 6 can lock the first front connecting rod 34 and the front folding seat 36 together, and the second locking mechanism 7 can lock the first rear connecting rod 37 and the rear folding seat 39 together. In this case, the front folding seat 36 and the rear folding seat 39 cannot be pushed inwardly to fold the foldable frame, so that accidental folding of the folding chair during use can be avoided. Only when the first locking mechanism 6 and the second locking mechanism 7 are unlocked, the front folding seat 36 and the rear folding seat 39 can respectively be pushed horizontally and inwardly under an external pushing force to fold the foldable frame.

The upper supporting rod assembly 4 comprises two front upper supporting rods 41 and two rear upper supporting rods 42; the two front upper supporting rods 41 are detachably inserted into and fixed at upper ends of the two front supporting seats 31 respectively; lengths of the two rear upper supporting rods 42 are greater than lengths of the two front upper supporting rods 41; and the two rear upper supporting rods 42 are detachably inserted into and fixed at upper ends of the two rear supporting seats 32. The lower supporting rod assembly 5 comprises four lower supporting rod units 51 with equal lengths, and the four lower supporting rod units 51 are detachably inserted into and fixed at lower ends of the two front supporting seats 31 and lower ends of the two rear supporting seats 32 respectively. The chair surface 2 is a flexible cloth having a high side 21 and a low side 22; the high side 21 detachably sleeves upper ends of the two rear upper supporting rods 42, and the low side 22 detachably sleeves upper ends of the two front upper supporting rods 41. Therefore, when the folding chair is not in use, the chair surface 2 can be removed from the upper supporting rod assembly 4 for folding and storage; the upper supporting rod assembly 4 and the lower supporting rod assembly 5 can also be removed from the two front supporting seats 31 and the two rear supporting seats 32 for storage.

A group consisting of the front folding seat 36, the first front connecting rod 34, the second front connecting rod 35, and another group consisting of the rear folding seat 39, the first rear connecting rod 37, and the second rear connecting rod 38, are not positioned at a same height in the foldable frame, so that when the foldable frame 3 is in a folded state, the group consisting of the front folding seat 36, the first front connecting rod 34, the second front connecting rod 35, and said another group consisting of the rear folding seat 39, the first rear connecting rod 37, and the second rear connecting rod 38 can be positioned at different heights without interfering with each other. For example, in a preferred example of the present utility model, when the foldable frame 3 is in the folded state, the group consisting of the front folding seat 36, the first front connecting rod 34, and the second front connecting rod 35 is located above said another group consisting of the rear folding seat 39, the first rear connecting rod 37, and the second rear connecting rod 38.

In a preferred example of the present utility model, the first front connecting rod 34 and the first rear connecting rod 37 are arranged opposite to each other along a front-rear direction of the foldable frame, and the second front connecting rod 35 and the second rear connecting rod 38 are also arranged opposite to each other along the front-rear direction of the foldable frame. That is, the first front connecting rod 34 and the first rear connecting rod 37 are connected to said one end of the front folding seat 36 and said one end of the rear folding seat 39 respectively wherein said one end of the front folding seat 36 and said one end of the rear folding seat 39 face towards a same direction, and the second front connecting rod 35 and the second rear connecting rod 38 are located on said another end of the front folding seat 36 and said another end of the rear folding seat 39 respectively wherein said another end of the front folding seat 36 and said another end of the rear folding seat 39 face towards another same direction.

In a preferred example of the present utility model, the first locking mechanism 6 comprises a first elastic self-locking piece 61 arranged on the first front connecting rod 34, and a first locking hole 62 arranged on the front folding seat 36; the second locking mechanism 7 comprises a second elastic self-locking piece 71 arranged on the first rear connecting rod 37, and a second locking hole 72 arranged on the rear folding seat 39. When the foldable frame 3 is in the unfolded state, the first elastic self-locking piece 61 is automatically plugged into the first locking hole 62 to lock the first front connecting rod 34 with the front folding seat 36, and the second elastic self-locking piece 71 is automatically plugged into the second locking hole 72 to lock the first rear connecting rod 37 with the rear folding seat 39.

Furthermore, the front folding seat 36 is further provided with a first unlocking member 8; the rear folding seat 39 is further provided with a second unlocking member 9; the first elastic self-locking piece 61 can be separated from the first locking hole 62 by pressing the first unlocking member 8, so that the first front connecting rod 34 and the front folding seat 36 are unlocked; and the second elastic self-locking piece 71 can be separated from the second locking hole 72 by pressing the second unlocking member 9, so that the first rear connecting rod 37 and the rear folding seat 39 are unlocked.

In a preferred example of the present utility model, the front folding seat 36 is provided with a first open slot 361 penetrating through the front folding seat 36 along a left-right direction of the foldable frame, and opened towards a front direction of the foldable frame; said another end of the first front connecting rod 34 extends into the first open slot 361 from said one end of the front folding seat 36 and is rotatably connected to an upper slot wall 3611 and a lower slot wall 3612 of the first open slot 361 through a first pin shaft 10; said another end of the second front connecting rod 35 extends into the first open slot 361 from said another end of the front folding seat 36 and is fixedly connected to the upper slot wall 3611 and the lower slot wall 3612 of the first open slot 361 through at least one second pin shaft 11; the rear folding seat 39 is provided with a second open slot 391 penetrating through the rear folding seat 39 along the left-right direction of the foldable frame, and opened towards a rear direction of the foldable frame; said another end of the first rear connecting rod 37 extends into the second open slot 391 from said one end of the rear folding seat 39 and is rotatably connected to an upper slot wall 3911 and a lower slot wall 3912 of the second open slot 391 through a third pin shaft 12; and said another end of the second rear connecting rod 38 extends into the second open slot 391 from said another end of the rear folding seat 39 and is fixedly connected to the upper slot wall 3911 and the lower slot wall 3912 of the second open slot 391 through at least one fourth pin shaft 13. In addition, in order to improve the stability of the fixed connection between the second front connecting rod 35 with the upper slot wall 3611 and the lower slot wall 3612 of the first open slot 361 and also the stability of the fixed connection between the second rear connecting rod 38 with the upper slot wall 3911 and the lower slot wall 3912 of the second open slot 391, there are two second pin shafts 11 and two fourth pin shafts 13 respectively, which in each case are arranged side by side and spaced apart from each other along the left-right direction of the foldable frame.

In a preferred example of the present utility model, distances from a rotatable connection position A between the first front connecting rod 34 and the front folding seat 36 to the two front supporting seats 31 respectively are equal, and the rotatable connection position A between the first front connecting rod 34 and the front folding seat 36 is located more frontal (along a front-rear direction of the foldable frame) than fixed connection position(s) B between the second front connecting rod 35 and the front folding seat 36. Distances from a rotatable connection position C between the first rear connecting rod 37 and the rear folding seat 39 to the two rear supporting seats 32 respectively are equal, and the rotatable connection position C between the first rear connecting rod 37 and the rear folding seat 39 is located more rearward (along a front-rear direction of the foldable frame) than fixed connection position(s) D between the second rear connecting rod 38 and the rear folding seat 39.

In a preferred example of the present utility model, said another end of the first front connecting rod 34 extending into the first open slot 361 is fixedly provided with a first rotating joint 341; one end of the first rotating joint 341 away from the first front connecting rod 34 is rotatably connected to frontal positions at a middle of the upper slot wall 3611 and the lower slot wall 3612 of the first open slot 361 through the first pin shaft 10; said another end of the first rear connecting rod 37 extending into the second open slot 391 is fixedly provided with a second rotating joint 371; and one end of the second rotating joint 371 away from the first rear connecting rod 37 is rotatably connected to rear positions at a middle of the upper slot wall 3911 and the lower slot wall 3912 of the second open slot 391 through the third pin shaft 12.

In a preferred example of the present utility model, the first locking hole 62 is arranged through the upper slot wall 3611 of the first open slot 361; one end of the first unlocking member 8 movably extends into the first locking hole 62 to be in abutting fit with a plugging end of the first elastic self-locking piece 61; another end of the first unlocking member 8 is exposed from an upper side of the front folding seat 36 to define a pressing end 81 of the first unlocking member 8; the second locking hole 72 is arranged through the lower slot wall 3912 of the second open slot 391; one end of the second unlocking member 9 movably extends into the second locking hole 72 to be in abutting fit with a plugging end of the second elastic self-locking piece 71; and another end of the second unlocking member 9 is exposed from a lower side of the rear folding seat 39 to define a pressing end 91 of the second unlocking member 9.

Moreover, a first inclined guiding port 14 located right in front of the first locking hole 62 is arranged on the upper slot wall 3611 of the first open slot 361; the first inclined guiding port 14 can guide the plugging end of the first elastic self-locking piece 61 into the first open slot 361 and into the first locking hole 62 when the foldable frame 3 is unfolded; a second inclined guiding port 15 located right behind the second locking hole 72 is arranged on the lower slot wall 3912 of the second open slot 391; and the second inclined guiding port 15 can guide the plugging end of the second elastic self-locking piece 71 into the second open slot 391 and into the second locking hole 72 when the foldable frame 3 is unfolded.

In a preferred example of the present utility model, the first elastic self-locking piece 61 comprises a first self-locking ball pin 611 and a first spring 612; the first self-locking ball pin 611 and the first spring 612 are both mounted in the first front connecting rod 34; a first exposing hole 340 from which the first self-locking ball pin 611 is exposed is formed on a wall of the first front connecting rod 34; the first spring 612 biases the first self-locking ball pin 611 to expose from the first exposing hole 340; the plugging end of the first elastic self-locking piece 61 is defined by an exposed end of the first self-locking ball pin 611; the second elastic self-locking piece 71 comprises a second self-locking ball pin 711 and a second spring 712; the second self-locking ball pin 711 and the second spring 712 are both mounted in the first rear connecting rod 37; a second exposing hole 370 from which the second self-locking ball pin 711 is exposed is formed on a wall of the first rear connecting rod 37; the second spring 712 biases the second self-locking ball pin 711 to expose from the second exposing hole 370; and the plugging end of the second elastic self-locking piece 71 is defined by an exposed end of the second self-locking ball pin 711.

In a preferred example of the present utility model, a third open slot 311 with an L-shaped opening is arranged on each of the two front supporting seats 31 at an upper part of a side surface thereof facing towards another one of the front supporting seats 31, and a fourth open slot 321 with an L-shaped opening is arranged on each of the two rear supporting seats 32 at a lower part of a side surface thereof facing towards another one of the rear supporting seats 32; said one end of the first front connecting rod 34 opposite to said another end of the first front connecting rod 34 connected to the front folding seat 36 extends into the third open slot 311 of a corresponding front supporting seat 31 and being rotatably connected thereto, and said one end of the second front connecting rod 35 opposite to said another end of the second front connecting rod 35 connected to the front folding seat 36 extends into the third open slot 311 of another corresponding front supporting seat 31 and being rotatably connected thereto; and said one end of the first rear connecting rod 37 opposite to said another end of the first rear connecting rod 37 connected to the rear folding seat 39 extends into the fourth open slot 321 of a corresponding rear supporting seat 32 and being rotatably connected thereto, and said one end of the second rear connecting rod 38 opposite to said another end of the second rear connecting rod 38 connected to the rear folding seat 39 extends into the fourth open slot 321 of another corresponding rear supporting seat 32 and being rotatably connected thereto, so that when the front folding seat 36 and the rear folding seat 39 are pushed inwardly towards each other when folding the foldable frame, the first front connecting rod 34 and the second front connecting rod 35, as well as the first rear connecting rod 37 and the second rear connecting rod 38, are driven to be rotated inwardly to achieve folding of the foldable frame.

As mentioned above, a folding and storage process of the folding chair of the present utility model is as follows: Firstly, the pressing end 81 of the first unlocking member 8 and the pressing end 91 of the second unlocking member 9 are pushed respectively to separate the plugging end of the first elastic self-locking piece 61 and the plugging end of the second elastic self-locking piece 71 from the first locking hole 62 and the second locking hole 72 respectively; then, the front folding seat 36 and the rear folding seat 39 are pushed inwards, so that the first front connecting rod 34 and the second front connecting rod 35, as well as the first rear connecting rod 37 and the second rear connecting rod 38 are driven to be rotated inwardly, and the two side connecting rods 33 are then also driven towards each other, thereby completing the folding of the foldable frame 3; afterwards, the chair surface 2 is removed from the upper supporting rod assembly 4 for folding and storage; and the upper supporting rod assembly 4 and the lower supporting rod assembly 5 are also removed from the two front supporting seats 31 and the two rear supporting seats 32 for storage.

Claims

1. A folding chair, comprising a chair frame and a chair surface; the chair frame comprises a foldable frame, an upper supporting rod assembly and a lower supporting rod assembly; the upper supporting rod assembly is removably mounted to an upper side of the foldable frame, and the lower supporting rod assembly is removably mounted to a lower side of the foldable frame; the chair surface is removably mounted to an upper side of the upper supporting rod assembly; wherein:

the foldable frame comprises two front supporting seats, two rear supporting seats, two side connecting rods, a first front connecting rod, a second front connecting rod, a front folding seat, a first rear connecting rod, a second rear connecting rod, and a rear folding seat;
one end of each of the two side connecting rods is fixedly connected to a corresponding rear supporting seat of the two rear supporting seats, and another end of each of the two side connecting rods is fixedly connected to a corresponding front supporting seat of the two front supporting seats; the front folding seat is located between the two front supporting seats; one end of the first front connecting rod is rotatably connected to one of the front supporting seats so as to be rotatable on a horizontal plane, and another end of the first front connecting rod is rotatably connected to one end of the front folding seat so as to be rotatable on the horizontal plane; one end of the second front connecting rod is rotatably connected to another one of the other front supporting seats so as to be rotatable on the horizontal plane, and another end of the second front connecting rod is fixedly connected to another end of the front folding seat; the rear folding seat is located between the two rear supporting seats; one end of the first rear connecting rod is rotatably connected to one of the rear supporting seats so as to be rotated on another horizontal plane, and another end of the first rear connecting rod is rotatably connected to one end of the rear folding seat so as to be rotatable on said another horizontal plane; one end of the second rear connecting rod is rotatably connected to another one of the rear supporting seats so as to be rotated along said another horizontal plane, and another end of the second rear connecting rod is fixedly connected to another end of the rear folding seat;
a first locking mechanism is provided between the first front connecting rod and the front folding seat, and a second locking mechanism is provided between the first rear connecting rod and the rear folding seat; when the foldable frame is in an unfolded state, the first locking mechanism is operable to achieve a locked condition where the first front connecting rod and the front folding seat are locked together, and the second locking mechanism is operable to achieve a locked condition where the first rear connecting rod and the rear folding seat are locked together;
when the first locking mechanism and the second locking mechanism are unlocked, the front folding seat and the rear folding seat are allowed to be pushed horizontally and inwardly to fold the foldable frame.

2. The folding chair of claim 1, wherein the front folding seat, the first front connecting rod, and the second front connecting rod, considered collectively as a whole, are not positioned at a same height in the foldable frame as compared with the rear folding seat, the first rear connecting rod, and the second rear connecting rod, considered collectively as a whole, so that when the foldable frame is in a folded state, the front folding seat, the first front connecting rod, and the second front connecting rod, considered collectively as a whole, and the rear folding seat, the first rear connecting rod, and the second rear connecting rod, considered collectively as a whole, are positioned at different heights without interfering with each other.

3. The folding chair of claim 1, wherein the two front supporting seats and the two rear supporting seats are arranged at four corners of the foldable frame which is formed to have a horizontal rectangular shape; the first front connecting rod and the first rear connecting rod are arranged opposite to each other along a front-rear direction of the foldable frame, and the second front connecting rod and the second rear connecting rod are also arranged opposite to each other along the front-rear direction of the foldable frame.

4. The folding chair of claim 1, wherein the first locking mechanism comprises a first elastic self-locking piece arranged on the first front connecting rod, and a first locking hole arranged on the front folding seat; the second locking mechanism comprises a second elastic self-locking piece arranged on the first rear connecting rod, and a second locking hole arranged on the rear folding seat; when the foldable frame is in the unfolded state, the first elastic self-locking piece is automatically plugged into the first locking hole to lock the first front connecting rod with the front folding seat, and the second elastic self-locking piece is automatically plugged into the second locking hole to lock the first rear connecting rod with the rear folding seat;

the front folding seat is further provided with a first unlocking member; the rear folding seat is further provided with a second unlocking member; the first elastic self-locking piece is separated from the first locking hole when the first unlocking member is pressed, and the second elastic self-locking piece is separated from the second locking hole when the second unlocking member is pressed.

5. The folding chair of claim 4, wherein the front folding seat is provided with a first open slot penetrating through the front folding seat along a left-right direction of the foldable frame, and opened towards a front direction of the foldable frame; said another end of the first front connecting rod extends into the first open slot from said one end of the front folding seat and is rotatably connected to an upper slot wall and a lower slot wall of the first open slot through a first pin shaft; said another end of the second front connecting rod extends into the first open slot from said another end of the front folding seat and is fixedly connected to the upper slot wall and the lower slot wall of the first open slot through at least one second pin shaft;

the rear folding seat is provided with a second open slot penetrating through the rear folding seat along the left-right direction of the foldable frame, and opened towards a rear direction of the foldable frame; said another end of the first rear connecting rod extends into the second open slot from said one end of the rear folding seat and is rotatably connected to an upper slot wall and a lower slot wall of the second open slot through a third pin shaft; and said another end of the second rear connecting rod extends into the second open slot from said another end of the rear folding seat and is fixedly connected to the upper slot wall and the lower slot wall of the second open slot through at least one fourth pin shaft.

6. The folding chair of claim 1, wherein distances from a rotatable connection position between the first front connecting rod and the front folding seat to the two front supporting seats respectively are equal, and the rotatable connection position between the first front connecting rod and the front folding seat is located more frontal along a front-rear direction of the foldable frame than a fixed connection position or fixed connection positions between the second front connecting rod and the front folding seat;

distances from a rotatable connection position between the first rear connecting rod and the rear folding seat to the two rear supporting seats respectively are equal, and the rotatable connection position between the first rear connecting rod and the rear folding seat is located more rearward along the front-rear direction of the foldable frame than a fixed connection position or fixed connection positions between the second rear connecting rod and the rear folding seat.

7. The folding chair of claim 5, wherein said another end of the first front connecting rod extending into the first open slot is fixedly provided with a first rotating joint; one end of the first rotating joint away from the first front connecting rod is rotatably connected to frontal positions at a middle of the upper slot wall and the lower slot wall of the first open slot through the first pin shaft;

said another end of the first rear connecting rod extending into the second open slot is fixedly provided with a second rotating joint; and one end of the second rotating joint away from the first rear connecting rod is rotatably connected to rear positions at a middle of the upper slot wall and the lower slot wall of the second open slot through the third pin shaft.

8. The folding chair of claim 5, wherein the first locking hole is arranged through the upper slot wall of the first open slot; one end of the first unlocking member movably extends into the first locking hole to be in abutting fit with a plugging end of the first elastic self-locking piece; another end of the first unlocking member is exposed from an upper side of the front folding seat to define a pressing end of the first unlocking member;

the second locking hole is arranged through the lower slot wall of the second open slot; one end of the second unlocking member movably extends into the second locking hole to be in abutting fit with a plugging end of the second elastic self-locking piece, and another end of the second unlocking member is exposed from a lower side of the rear folding seat to define a pressing end of the second unlocking member.

9. The folding chair of claim 8, wherein a first inclined guiding port located right in front of the first locking hole is arranged on the upper slot wall of the first open slot; the first inclined guiding port guides the plugging end of the first elastic self-locking piece into the first open slot and into the first locking hole when the foldable frame is unfolded;

a second inclined guiding port located right behind the second locking hole is arranged on the lower slot wall of the second open slot; and the second inclined guiding port guides the plugging end of the second elastic self-locking piece into the second open slot and into the second locking hole when the foldable frame is unfolded.

10. The folding chair of claim 4, wherein the first elastic self-locking piece comprises a first self-locking ball pin and a first spring; the first self-locking ball pin and the first spring are both mounted in the first front connecting rod; a first exposing hole from which the first self-locking ball pin is exposed is formed on a wall of the first front connecting rod; the first spring biases the first self-locking ball pin to expose from the first exposing hole;

the second elastic self-locking piece comprises a second self-locking ball pin and a second spring; the second self-locking ball pin and the second spring are both mounted in the first rear connecting rod; a second exposing hole from which the second self-locking ball pin is exposed is formed on a wall of the first rear connecting rod; the second spring biases the second self-locking ball pin to expose from the second exposing hole.
Patent History
Publication number: 20250072616
Type: Application
Filed: Nov 8, 2023
Publication Date: Mar 6, 2025
Inventor: Jiang ZHU (Zhejiang)
Application Number: 18/387,856
Classifications
International Classification: A47C 4/28 (20060101);