MULTIFUNCTIONAL CHAIR

Abstract

The present invention relates to a multifunctional chair which is configured to train, rehabilitate, and correct the back spine, pelvis and knee joints of the user. The angle of inclination of a seat member can be adjusted arbitrarily to the front, rear, left and right, thereby preventing back injury due to a sharp angle of inclination from the outset, while at the same time completely preventing rocking of the seat member when back exercises are not being carried out and thus allowing the chair to be used as a general chair. A rolling member provided in a lower part of the seat is improved, thereby imparting a cushioned feel to the seat while restricting the range of tilting movement of the seat to only front-and-back, left-and-right and multidirectional and preventing rotation in such a way as to limit excessive rocking of the seat overall and hence prevent side effects from seated exercises.

Description

TECHNICAL FIELD

The present invention relates to a multifunctional chair which aims at training, rehabilitating and correcting a users back spine, pelvises and knee joints, and in particular to a multifunctional chair which is directed to preventing a waist injury which might occur due to a sharp slope angle when a user first sits by providing a function of freely adjusting a slope angle in forward, backward, leftward and rightward directions, and when a waist is not exercised, it is possible to prevent well the movements of a seat member, thus being used as an ordinary chair. The sitting seat is made to have a good cushion feeling by improving a rolling member provided beneath a seat, and the movement range of a slope of a seat is limited to a forward and backward direction and a leftward and rightward direction and multiple directions, respectively, whereas the rotation is prevented, thus limiting an over movement of a sitting seat in whole and preventing a side effect in terms of a sitting type exercise.

BACKGROUND ART

There are various types of exercise tools which help do a proper exercise for each part of a human body and help rehabilitate a hurt or weakened portion of it. A multifunctional chair which is a similar one among multiple tools is disclosed in Korean patent application number 10-2005-40701.

As shown in FIG. 1, a back spine correction apparatus formed of a gas cylinder disposed at an upper side of a support having a moving member at its lower side, a rod inserted in an upward and downward movable way into the interior of the gas cylinder, and a lower member formed of a gas absorber inserted in a movable way in the interior and protruded from the upper side of the rod comprises a housing 24 in which an outward protrusion part 22 is formed, with a vertical hole 22a, into which the top of the rod 16 is inserted, passing through the outward protrusion part 22, and an inner side protrusion part 23 with an insertion groove 23a is integrally formed, and a gas absorber operation member 30 is provided for the purpose of operating the gas absorber 18; an ascending and descending movement device 20 which is formed of a housing casing 27 fixedly engaged at the top of the housing 24; a rolling means B which is disposed between the housing casing 27 and the lower side of the seat member 1 and has an unlocking member 60 for selectively retaining the rolling and unrolling with respect to the seat member 1; a rotation support plate 82 which is rotatably fixed at either inner side of the housing 24 by way of a horizontal rotation shaft 81 and which is protruded from the backside of the housing 24; a backrest frame 83 which is fixedly engaged to the interior of the backside of the rotation support plate 82 and is spun (tilted) and supported in the outward direction by way of a tilting support means C, and a backrest tilting device 80 which is provided at a front side region of the housing 24 and has a tilting unlocking means D for unlocking the tilted state in an outward direction of the backrest frame 83.

In addition, as shown in FIG. 2, the rolling means B comprises a rolling casing 52 which is fixedly engaged at a lower, central region of the seat member 1 and in which a cushion protrusion part 50 having a bearing rolling groove 50a is formed at a lower, central region, and a cushion protrusion 51 with a cushion groove 51a is integrally formed at an upper, central region; a rolling bearing 54 which is elastically inserted in the bearing rolling groove 50a and performs a rotation rolling movement at a proper angle and which is fixed at an outer surface of a through hole 27a of an upper side of the housing casing 27; a fixing bolt 55 which passes through the through hole 27a of the housing casing 27 and the inner diameter of the rolling bearing 54, a fixing nut 56 which is fixedly engaged to the fixing bolt 55 for thereby fixing the fixing bolt 55 to the housing casing 27, a cushion member 57 which is pressed and fixed at an upper, outer side of the fixing bolt 55 and is inserted to protrude from the inner side of the cushion groove 51a of the cushion protrusion 51 to the outside and is made from an urethane material; and a unlocking member 60 which is closely disposed between the upper side of the housing casing 27 and the rolling protrusion part 50 for thereby selectively retaining the rolling and unrolling states of the seat member 1.

However, in the above described conventional multifunctional chair, the rolling mean B is characterized in that the slope angle of the rolling in terms of the seat member 1 is determined by means of a cushion member 57 made from a urethane material, when the elasticity of the cushion member 57 is weakened or it is damaged, the shape of the seat member 1 is deformed in one direction or the slope angles of the forward, backward, leftward and rightward directions become inaccurate, so the injuries of the users such as weak persons might be worsened. Since there is not a means for fixing the seat member 1 in place, not to move, in the conventional art, it is needed for a user to sit after he adjusts the seat member 1 to a normal position, thus causing, any inconveniences.

Since there is not a means for adjusting a slope angle of the seat member 1 in a conventional art, when an old or weak person or a user who suffers from a weak waist sits carelessly, since the slope angle that the seat member 1 inclines at is too large, a user might have a waist injury.

The conventional multifunctional chair comprise a moving means which is movable being supported on the ground, a gas absorber which is upright installed at the moving means for thereby adjusting the height of the seat, a fixing bracket which is installed at the top of the gas absorber and has a height adjusting part with a three-stage fixing shoulder at its outer surface and integrally has a vertical rod at its center, the vertical rod having an engaging hole at its top, a seat support member which has a connection boss part having at its center an installation hole guiding a vertical rod provided at the center of the fixing bracket, the upper side of the seat support member being connected with the lower side of the sitting seat, a rolling adjusting lever which passes through the rolling member disposed between the seat support member and the fixing bracket and integrally has a slope angle adjusting shoulder at the inner diameter for thereby being selectively engaged with the three-stage fixing shoulder of the height adjusting part for thereby adjusting in multiple stages the height of the seat support member with respect to the rolling member, and a spherical bearing and a spherical bussing which are engaged at the end portions of the engaging bolt and the vertical rod engaged to the vertical rod of the fixing bracket from the upper side of the seat support member for thereby inducing the movements of the central portions of the seat support member.

However, in the above described conventional multifunctional chair, the rolling of the sitting seat contributes to adjusting step by step the rolling slope by adjusting the height of the seat support member by way of the rolling adjusting lever by adapting the vertical rod of the fixing bracket as an axis; however the rolling operation has a problem that it spins out of the movement ranges in the forward, backward, leftward and rightward directions of the sitting seat, so the over movements of the seat might cause side effects in terms of the sitting type exercise.

It is disadvantageous that the cushion feeling of the sitting seat is generally worsened in whole in the range of limiting the rolling operations, which results in the degradation of the chair which actually has both chair function and exercise function.

DISCLOSURE OF INVENTION

Accordingly, the present invention is invented so as to resolve the above described problems. It is an object of the present invention to provide a multifunctional chair which is characterized in that it is possible to prevent a user from injuries due to a sharp slope in such a way to properly adjust the slope depending on a user by providing a rolling adjusting means which can freely adjust the slope angle in the forward, backward, leftward and rightward directions of the rolling means installed at the lower side of the seat member, and the present invention can be used for the purpose of an ordinary chair by handling the seat member not to move by making use of the rolling adjusting means, and the present invention helps a user sit easily in such a way to fix, at the upper housing fixed with the seat member, the top of a spring member, which is shaped like a double-headed drum with a narrow waist in the middle, after the spring member is elastically installed at the rolling adjusting means, and in such a way to fix the lower end of the spring member at the lower housing connected with the moving means, so the seat member is always positioned in normal place for thereby allowing the user to sit easily.

It is another object of the present invention to provide a multifunctional chair which has a rotation prevention function of a seat when conducting a sitting type exercise for the purpose of preventing side effects in terms of a sitting type exercise in such a way to provide a good cushion feeling of a sitting seat by improving the rolling member provided at the lower side of the sitting seat and in such a way to limit the slope movement range of the sitting seat to the forward, backward, leftward and rightward directions and in such a way to limit in whole the over movements of the seat while preventing the rotations.

To achieve the above objects, there is provided a multifunctional chair which includes a support member having a moving means at its lower side; an ascending and descending member which is upwardly installed from the center of the support member and serves to adjust the height with the aid of an operation rod in the interior of a gas cylinder; a rolling member which is installed at the top of the ascending and descending member and is installed in a rolling possible way in a forward, backward, leftward or rightward direction, and a seat member which is installed at the top of the rolling member and allows a user to sit in safe, the multifunctional chair comprising a fixing bracket which is installed at the top of an operation rod of the ascending and descending member and in which an arm rest is fixed at either side of it, a vertical rod with a certain height is installed at its central, upper side, and at the top of the vertical rod is installed a seat plate engaged and installed at the bottom surface of the seat member and the top of the fixing bracket; a rolling adjusting means in which a cylindrical adjusting part is integrally formed at its peripheral portion with a certain interval from the vertical rod at the top of the fixing bracket, and a plurality of fixing shoulders are formed at inclined angles in multiple steps at the outer surface of the adjusting part, and a height adjusting part is installed at the outer surface of the fixing shoulder in such a way to slide-rotate together with it, and a stopper is formed at an inner surface of the height adjusting part and slides along a plurality of fixing shoulders, and as the lever of one side of the height adjusting part is tilted, its upper side comes into contact with a circular protrusion part provided beneath the seat plate or comes separated from it for thereby preventing the rolling of the seat member or adjusting the rolling angle of it; and a rolling member in which a spring serving the rolling of the seat member is installed at an outer surface of the vertical rod between the fixing shoulder and the seat plate, and a spherical plane, which is kind of a bearing, is installed at a bearing hole of the seat plate, and the top of the vertical rod is engaged by an engaging bolt at the ball bearing.

In addition, the present invention is characterized in that a spring is elastically installed between the fixing shoulder and the seat plate, and a lower end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder, and an upper end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder of the lower side of the seat plate, so the seat member of the upper side of the seat plate is always positioned in normal place.

The present invention is further characterized in that an operation space part into which the top of the operation rod of the ascending and descending member is inserted is formed at the lower side of the fixing bracket, and at one side of the operation space part is installed an operation lever as a two-stage operation hole is formed in a lateral direction, and one end of the operation lever inserted into the interior of the two-stage operation hole comes into contact with the gas absorber of the operation rod or comes separated from it for thereby controlling the ascending and descending operations of the ascending and descending member or obtaining a continuous ascending operation.

In addition, the present invention is characterized in that a wrinkle tube made from a rubber material is installed between the upper side of the height adjusting part and the protrusion part of the lower side of the seat plate for improving the lowering operation of the height adjusting part.

A multifunctional chair which includes a moving means supporting from a lower surface for movements, an ascending and descending member which is upright installed at the moving means and serves to adjust the height of the sitting seat, a fixing bracket which is installed at the top of the ascending and descending member and has at its outer surface a height adjusting part with a three-stage fixing shoulder and integrally has at its central upper portion a vertical rod with a connection hole, a seat plate which has a connection boss part having at its central portion an installation hole guiding the vertical rod provided at the center of the fixing bracket, with the upper side of the seat plate being connected with the lower side of the sitting seat, a rolling adjusting means which passes through the rolling member installed between the seat plate and the fixing bracket and integrally has a slope adjusting shoulder at its inner diameter for being selectively engaged from the three-stage fixing shoulder of the height adjusting part for thereby adjusting in multiple steps the height of the seat plate with respect to the rolling member, and a spherical plane and a spherical ball bearing which are engaged at the engaging bolt engaged to the vertical rod of the fixing bracket from the upper side of the seat plate and at the end portion of the vertical rod for thereby guiding the movements at the central portions of the seat plate,

the multifunctional chair comprising hexagonal engaging grooves which are provided correspondingly at the inner diameter of the height adjusting part of the fixing bracket corresponding to the connection boss part of the seat plate engaging the rolling member, and said rolling member is characterized in that a hexagonal engaging part is formed at the upper and lower portions in a hollow shape to accommodate therein the vertical rod, and a spiral body is formed between the hexagonal engaging part, and a compression spring is provided at the inner side of the body for preventing the twisting of the rolling member together with the cushion function of the sitting seat.

The body of the rolling member is made from a rubber material of a urethane.

ADVANTAGEOUS EFFECTS

The present invention has very efficient effects since it is characterized in that it is possible to prevent injuries which might occur due to a sharp slope in such a way to properly adjust the slope angle depending on a user by providing a rolling adjusting means which can freely adjust the slope angles in the forward, backward, leftward and rightward directions of the rolling means installed at the lower side of the seat member, and the multifunctional chair of the present invention can be used for the purpose of an ordinary chair in such a way to handle the seat member not to move by making use of the rolling adjusting means, and a spring member, which is shaped like a double-headed drum with a narrow waist in the middle, is elastically installed at a rolling adjusting means, and the top of it is fixed at the upper housing fixed with the seat member, and the lower side of the spring member is fixed at the lower housing connected with the moving means, so the user can easily sit since the seat member is always positioned in normal place.

The present invention has advantageous effects that the multifunctional chair of the present invention can be usefully used as a multifunctional chair having both ordinary chair function and sitting type exercise function in such a way to prevent the injuries and side effects which might occur due to the over movements during the sitting type exercise by preventing the unnecessary twisting operations of the sitting seat during the sitting type exercise using the sitting seat as a hexagonal head part belonging to the rolling member is engaged to a hexagonal engaging groove provided at the height adjusting parts of the rolling adjusting lever and the fixing bracket which intermittently adjust the heights of the seat support member in terms of the rotations of the sitting seat when the sitting seat rolls in the forward, backward, leftward or rightward direction, and the multifunctional chair of the present invention can be efficiently used for a multifunctional chair which has both ordinary chair function and sitting type exercise function by providing a sitting seat with a cushion feeling with the aid of the material of the body of the rolling member and the compression spring provided in the interior.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view illustrating a conventional multifunctional chair.

FIG. 2 is a side cross sectional view illustrating the key elements of a conventional multifunctional chair.

FIG. 3 is a disassembled perspective view illustrating a rolling member of a multifunctional chair according to the present invention.

FIG. 4 is a perspective view illustrating a rolling member of FIG. 3.

FIG. 5 is a side cross sectional view illustrating the key elements of a multifunctional chair according to the present invention.

FIG. 6 is a view illustrating in sequence the operation states of a rolling adjusting means of a multifunctional chair according to the present invention.

FIG. 7 is a front cross sectional view illustrating the key elements of a multifunctional chair according to the present invention.

FIG. 8 is a front view illustrating a multifunctional chair according to an example of the present invention.

FIG. 9 is a perspective view illustrating the key elements of a multifunctional chair after separating them in FIG. 8.

FIG. 10 is a perspective view illustrating a state that the elements of FIG. 9 are combined.

FIG. 11 is a perspective view illustrating a rotation prevention part installed between a rolling means and a seat plate of FIG. 8.

FIG. 12 is an enlarged cross sectional view illustrating by cutting away a rotation prevention part of FIG. 11.

FIGS. 13 and 14 are vertical cross sectional views illustrating key elements in a rolling state and a fixing state of a multifunctional chair according to the present invention.

FIG. 15 is a view illustrating a description of a height adjusting state by exploding key elements of a height adjusting mean and a rolling adjusting means of a fixing bracket according to the present invention.

BEST MODES FOR CARRYING OUT THE INVENTION

The preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the multifunctional chair which includes a support member 100 having a moving means 110 at its lower side; an ascending and descending member 200 which is upwardly installed from the center of the support member 100 and serves to adjust the height with the aid of an operation rod 220 in the interior of a gas cylinder 210; a rolling member 300 which is installed at the top of the ascending and descending member 200 and is installed in a rolling possible way in a forward, backward, leftward or rightward direction, and a seat member 400 which is installed at the top of the rolling member 300 and allows a user to sit in safe,

the fixing bracket 500 installed at the top of the operation rod 220 of the ascending and descending member 200, as shown in FIGS. 3 and 4, is characterized in that an arm rest fixing part 510 at either side of which an arm rest 410 of a seat member 400 is stably fixed is provided, and at a central, upper portion of the fixing bracket 500 is provided a vertical rod 520 with a certain height, and at the top of the vertical rod 520 is provided an insertion part 530, and a connection hole 540 passes through the central axis line of the insertion part 530.

At the central, lower side of the fixing bracket 500 is formed an operation space part 550 into which the top of the operation rod 220 of the ascending and descending member 200 is inserted, and at one side of the operation space part 550 is formed an installation hole 551, and in the installation hole 551 is engaged an operation cap 553 with a two-stage operation hole 552, and at the two-stage operation hole 552 of the operation cap 553 is installed the operation lever 554 with a certain length with the aid of the engaging pin 555. Here, one end of the operation lever 554 inserted into the inner side of the two-stage operation hole 552 corresponds to the gas absorber 221 of the operation rod 220.

In other words, when the operation lever 554 is pushed in a lateral direction and is moved to the two-stage operation hole 552 positioned at the lateral side of the two-stage operation hole 552, the end portion of the operation lever 554 is separated from the gas absorber 221, so the operation rod 220 ascends, and the operation lever 554 in pushed in the two-stage operation hole 552 which remained in the original position, so the end portion of the operation lever 554 comes into contact with the gas absorber 221, whereby the operation rod 220 is fixed in place.

At the top of the fixing bracket 500 is installed a rolling adjusting part 600 adjusting the tilting of the seat member 400. A cylindrical adjusting part 610 is integrally formed around the rolling adjusting part 600 at a certain distance from the vertical rod 520 of the fixing bracket 500, and at an outer surface of the adjusting part 610 is installed at a certain inclined angle the fixing shoulder 620 connected, for example, in a three-stage structure.

At an outer surface of the adjusting part 610 is installed a height adjusting part 630 having a spring insertion hole 633 for the sake of a slide rotation in response thereto, and at the inner surface of the height adjusting part 630 is provided a stopper 631 which slides along a plurality of fixing shoulders 620 as shown in FIG. 4, so as the lever 632 at one side of the height adjusting part 630 is tilted, the top of the height adjusting part 630 as shown in FIG. 5 comes into contact with a circular protrusion part 411 provided beneath the seat plate 410 or comes distanced from it for thereby preventing the rolling of the seat member 400 or coming to sequentially adjusting the rolling angles of it.

A rolling member 300 is installed between the adjusting part 610 of the fixing bracket 500 and the protrusion part 411 of the seat plate 410, and a spring 310, which is shaped like a double-headed drum with a narrow waste at its middle, is installed at an outer surface of the vertical rod 520 between the fixing shoulder 620 and the seat plate 410 for thereby maintaining a horizontal state and a rolling operation of the seat member 400, and at the bearing hole 412 of the seat plate 410 is installed a spherical plane 320 which is a kind of the bearing. The engaging bolt 330 is forced to pass through the ball bearing 321 and is engaged with a nut 340 in the operation space part 550 of the lower side of the vertical rod 520, so the separated seat member 400 and fixing bracket 500 come to be engaged with each other.

At this time, the spring 310 is elastically installed, and the lower end portion of the spring 310 is engaged to the fixing groove 640 formed at one side of the adjusting part 610 with the fixing shoulder 620. The upper end portion of the spring 310 is engaged to the fixing groove (not shown) formed at one side of the fixing shoulder 620 of the lower side of the seat plate 410, so as such the seat member 400 of the upper side of the seat plate 410 does not move in a left or right direction, in other words, always stays in place.

A wrinkle tube 700 made from a rubber material is installed between the upper side of the height adjusting part 630 and the protrusion part 411 of the lower side of the seat plate 420 for thereby making easier the descending of the height adjusting part 630 with the aid of the elasticity of the wrinkle tube 700 and for thereby covering the upper side of the height adjusting part 630 and the protrusion part 411 of the lower side of the seat plate 410 not to be seen from the outside.

As show in FIGS. 8 to 15, the multifunctional chair according to an embodiment of the present invention corresponds to a multifunctional chair with a sitting type exercise function.

A multifunctional chair which includes a moving means 110 supporting from a lower surface for movements, an ascending and descending member 120 which is upright installed at the moving means 110 and serves to adjust the height of the sitting seat, a fixing bracket 130 which is installed at the top of the ascending and descending ember 120 and has at its outer surface a height adjusting part 132 with a three-stage fixing shoulder 131 and integrally has at its central upper portion a vertical rod 133 with a connection hole 133a, a seat plate 140 which has a connection boss part 141 having at its central portion an installation hole 141a guiding the vertical rod 133 provided at the center of the fixing bracket 130, with the upper side of the seat plate 140 being connected with the lower side of the sitting seat, a rolling adjusting means 160 which passes through the rolling member 150 installed between the seat plate 140 and the fixing bracket 130 and integrally has a slope adjusting shoulder 162 at its inner diameter for being selectively engaged from the three-stage fixing shoulder 131 of the height adjusting part 132 for thereby adjusting in multiple steps the height of the seat plate 140 with respect to the rolling member 150, and a spherical plane 320 and a spherical ball bearing 321 which are engaged at the engaging bolt 170 engaged to the vertical rod 133 of the fixing bracket 130 from the upper side of the seat plate 140 and at the end portion of the vertical rod 133 for thereby guiding the movements at the central portions of the seat plate 140, comprising:

hexagonal engaging grooves 140a and 130a which are provided correspondingly at the inner diameter of the height adjusting part 132 of the fixing bracket 130 corresponding to the connection boss part 141 of the seat plate 140 engaging the rolling member 150, and said rolling member 150 is characterized in that a hexagonal engaging part 152 is formed at the upper and lower portions in a hollow shape to accommodate therein the vertical rod, and a spiral body 154 is formed between the hexagonal engaging part 152, and a compression spring 156 is provided at the inner side of the body 154 for preventing the twisting of the rolling member 150 together with the cushion function of the sitting seat.

The body 154 of the rolling member 150 is made from a rubber material of a urethane.

MODES FOR CARRYING OUT THE INVENTION

The operations and effects of the multifunctional chair according to the present invention will be described.

First of all, the height adjusting part 630 of the rolling adjusting part 600 is engaged to the adjusting part 610 of the upper side of the fixing bracket 500. Here, as the stopper 631 of the height adjusting part 630 is engaged to the fixing shoulder 620 of the outer surface of the adjusting part 610 and the lever 632 of one side of the height adjusting part 630 is tilted, as shown in FIGS. 5 and 6, the upper side of the height adjusting part 630 comes into contact with the circular protrusion part 411 provided beneath the seat plate 410 or comes distanced from it for thereby preventing the rolling of the seat member 400 or coming to sequentially adjusting the rolling angles of it.

Next, the spring 310 is engaged to the spring insertion hole 633 of the height adjusting part 630 and is mounted at the vertical rod 520, and the engaging bolt 330 is forced to pass through the ball bearing 321 of the spherical plane 320 engaged with the seat plate 410 and is engaged with a nut 340 in the interior of the operation space part 550 of the lower side of the vertical rod 520, so the separated seat member 400 and fixing bracket 500 are engaged with each other.

At this time, the lower end portion of the spring 310 is engaged to the fixing groove 640 formed at one side of the adjusting part 610 with a fixing shoulder 620. The upper end portion of the spring 310 is engaged to the fixing groove (not shown) formed at one side of the fixing shoulder 620 of the lower side of the seat plate 410, so the seat member 400 of the upper side of the seat plate 410 does not move in a leftward or rightward direction, namely, it always stays in normal place.

The operation lever 554 is fixed, in an operation possible way with the engaging pin 555, at the installation hole 551 connected with the lateral side of the operation space part 550 of the lower side of the fixing bracket 500, and one end of the operation lever 554 inserted into the inner side of the two-stage operation hole 552 is matched with the gas absorber 221 of the operation rod 220.

When it is supposed to perform a waste exercise after the multifunctional chair is assembled in the above mentioned manner, a user sits at the seat member 400. At this time, the seat member 400 keeps a horizontal state by means of the elastic force of the spring 310; however it is connected in a rolling possible way by means of only the ball bearing 321 of the spherical plane 320, so a user who for the first time uses a multifunctional chair might feel a little unstable, so it is preferred to reduce a little the rolling angle of the seat member 400 for thereby preventing injuries which might occur due to the sharply changing rolling angle.

In other words, as shown in (b) of FIG. 6, the multifunctional chair at the first stage has a stopper 631 at the fixing shoulder 620 of the lower most portion. At this time, as shown in (a) of FIG. 5, since the interval between the height adjusting part 630 and the protrusion part 411 of the seat plate 410 is too large, the tilting angle of the seat member 400 in the forward, backward, leftward or rightward is about 20°, too large angle.

As for the user who uses for the first time or the weak or old user, it is needed to tilt the lever 632 of the rolling adjusting part 600 in one direction. As shown in (c) of FIG. 6, the stopper 631 travels over the fixing shoulder 620 positioned at the intermediate portion, so the interval between the height adjusting part 630 and the protrusion part 411 is narrowed, and the tilting angle of the seat member 400 in the forward, backward, leftward or rightward direction becomes above 10°, so as such the user is prevented from injured.

In addition, when it is supposed to use the multifunctional chair as an ordinary chair, it is needed to move the stopper 631 up to the fixing shoulder 620 of the upper most portion. At this time, as shown in (b) of FIG. 5, the adjusting part 630 and the protrusion part 411 become closer to each other, so the rolling phenomenon of the chair does not take place.

When the lever 632 of the rolling adjusting part 600 is tilted in the direction which is opposite the above-mentioned direction, as shown in (a) of FIG. 6, the stopper 631 descends to the fixing shoulder 620 positioned at the lower most portion, thus increasing the interval between the adjusting part 630 and the protrusion part 411. At this time, the user does exercise moving his waste in the forward, backward, leftward or rightward direction. Since the wrinkle tube 700 made from a rubber material is installed between the upper side of the height adjusting part 630 and the protrusion part 411 of the lower side of the seat plate 410, the height adjusting part 630 can very easily descend with the aid of elastic force of the wrinkle tube 700, and as such it is possible to cover the upper side of the height adjusting part 630 and the protrusion part 411 of the lower side of the seat plate 410 not to be seen from the outside.

When it is needed to conduct the ascending and descending exercise with the multifunctional chair, the adjusting part 630 and the protrusion part 411 are forced to be close in order for the rolling phenomenon of the seat member 400 not to take place, and the operation lever 554 is pushed in the lateral direction and is moved to the two-stage operation hole 552 positioned at the lateral portion of the two-stage operation hole 552. At this time, the end portion of the operation lever 554 is separated from the gas absorber 221, so the operation rod 220 comes to ascend freely. In other words, when a user gets up from the seat member 400, since the operation rod 220 ascends since the operation rod 220 descends when the user sits in the seat member 400, so as such it is possible for a user to perform a certain exercise.

In the present invention, the multifunctional chair having a function of preventing the rotation during the sitting type exercise is characterized in that the three-stage fixing shoulder 131 formed in the height adjusting part 132 of the fixing bracket 130 is formed in a circumference. When the above-mentioned construction is exploded and viewed, as shown in FIG. 15, it is seen like a staircase shape in which one side is inclined, with the advantageous construction of which the stopper 162 formed at the inner diameters of the rolling adjusting part 160 can best move and be fixedly positioned at the lower most portion and the upper most portion.

From the upper side of the rolling adjusting part 160, in which the fixing bracket 130 is installed, is a little protruded a rubber ring member 163, which is made from a urethane material at the upper side of the rolling adjusting part 160, more than the upper surface of the rolling adjusting part 160. The rubber ring member 163 comes into close contact with the lower surface of the connection boss part 141 of the seat plate 140 for thereby elastically supporting during the rolling of the sitting seat or at the time when fixing.

The stopper 162 is divided into three parts in a spiral shape, one side of which is inclined for the stopper 162 to easily move from the three-stage fixing shoulder 131. As such the stopper 162 can move from the three-stage fixing shoulder 131 of the height adjusting part 132 by rotating the rolling adjusting part 160 while holding one side of the rolling adjusting part 160. Here, the seat plate 140 has a certain interval, as much as the distance that the stopper 162 moves, from the upper surface of the rubber ring member 163 at the side of the rolling adjusting part 160 along with the sitting seat with respect to the rolling member 150 which is assembled as the hexagonal engaging part 152 of the upper and lower sides is engaged between the seat plate 140 from the fixing bracket 130.

As shown in FIG. 13, the above mentioned interval is created owing to the differences in heights, so the user can do exercise while sitting in the sitting seat as the user moves the sitting eat in the forward, backward, leftward or rightward direction.

The above mentioned sitting type exercise contributes to exercising or training the back spine including pelvises and knee joints of the body in a sitting posture or contributes to the rehabilitation in relation with the posture corrections.

The motions of the sitting seat are related to the slope, in other words, the rolling movements. Since the hexagonal engaging part 152 of the rolling member 150 is assembled to the hexagonal engaging grooves 130a and 140a formed at the inner diameters of the fixing bracket 130 and the connection boss part 141 of the seat plate 140, the twisting motions of the sitting seat can be prevented, which leads to preventing the unnecessary movements of the sitting seat.

The twisting prevention of the sitting seat in the multifunctional chair contributes to previously prevent the sitting seat and user's waist from abruptly rotating while the user exercises pelvises in a sitting posture, thus preventing the side effects of the exercise which might bring injuries.

In case of FIG. 14, the lower surface of the seat plate 140 comes into close contact with the rubber ring member 163 of the upper surface of the rolling adjusting part 160 by positioning the stopper 162 at the upper most portion of the fixing shoulder 131 of the height adjusting part 132 by rotating the rolling adjusting part 160, in other words, the operation state of which contributes to preventing the rolling of the seat plate 140. Here, the rubber ring member 163 provides a good close-contact performance and a good cushion feeling with the aid of the nature of the materials. The above mentioned state might be converted to the state that the present invention can be used for the purpose of an ordinary chair.

In a state that the mode is changed to the ordinary chair mode, the rolling member 150 provides a cushion effect with the aid of the elasticity of the material itself of the body 154 and the compression spring 156 installed in the interior when a user sits in or gets up from the sitting seat, which reduces a users sitting burden when sitting.

When the multifunctional chair is used for the purpose of a chair exclusive mode at the side surface, the height adjusting lever 111 connected to the ascending and descending member 120 installed at the fixing bracket 130 is operated, thus adjusting the heights of the sitting seat of the chair for the purpose of use.

INDUSTRIAL APPLICABILITY

There are various kinds of tools developed for the purpose of providing a proper exercise to each portion of a human body and performing a rehabilitation therapy on injuries and portions with weakened functions, and the present invention provided a multifunctional chair helping do a sitting type exercise by providing a function to the chair.

chair, rolling, seat, sitting plate

Claims

1. A multifunctional chair which includes a support member having a moving means at its lower side; an ascending and descending member which is upwardly installed from the center of the support member and serves to adjust the height with the aid of an operation rod in the interior of a gas cylinder; a rolling member which is installed at the top of the ascending and descending member and is installed in a rolling possible way in a forward, backward, leftward or rightward direction, and a seat member which is installed at the top of the rolling member and allows a user to sit in safe, comprising:

a fixing bracket which is installed at the top of an operation rod of the ascending and descending member and in which an arm rest is fixed at either side of it, a vertical rod with a certain height is installed at its central, upper side, and at the top of the vertical rod is installed a seat plate engaged and installed at the lower surface of the seat member and at the top of the fixing bracket;

a rolling adjusting means in which a cylindrical adjusting part is integrally ford at its peripheral portion with a certain interval from the vertical rod at the top of the fixing bracket, and a plurality of fixing shoulders are formed at inclined angles in multiple steps at the outer surface of the adjusting part, and a height adjusting part is installed at the outer surface of the fixing shoulder in such a way to slide-rotate together with it, and a stopper is formed at an inner surface of the height adjusting part and slides along a plurality of fixing shoulders, and as the lever of one side of the height adjusting part is tilted, its upper side comes into contact with a circular protrusion part provided beneath the seat plate or comes separated from it for thereby preventing the rolling of the seat member or adjusting the rolling angle of it; and

a rolling member in which a spring serving the rolling of the seat member is installed at an outer surface of the vertical rod between the fixing shoulder and the seat plate, and a spherical plane, which is kind of a bearing, is installed at a bearing hole of the seat plate, and the top of the vertical rod is engaged by an engaging bolt at the ball bearing.

2. A multifunctional chair according to claim 1, wherein a spring is elastically installed between the fixing shoulder and the seat plate, and a lower end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder, and an upper end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder of the lower side of the seat plate, so the seat member of the upper side of the seat plate is always positioned in normal place.

3. A multifunctional chair according to claim 1, wherein an operation space part into which the top of the operation rod of the ascending and descending member is inserted is formed at the lower side of the fixing bracket, and at one side of the operation space part is installed an operation lever as a two-stage operation hole is formed in a lateral direction, and one end of the operation lever inserted into the interior of the two-stage operation hole comes into contact with the gas absorber of the operation rod or comes separated from it for thereby controlling the ascending and descending operations of the ascending and descending member or obtaining a continuous ascending operation.

4. A multifunctional chair according to claim 1, wherein a wrinkle tube made from a rubber material is installed between the upper side of the height adjusting part and the protrusion part of the lower side of the seat plate for improving the lowering operation of the height adjusting part.

5. A multifunctional chair which includes a moving means 110 supporting from a lower surface for movements, an ascending and descending member 120 which is upright installed at the moving means 110 and serves to adjust the height of the sitting seat, a fixing bracket 130 which is installed at the top of the ascending and descending member 120 and has at its outer surface a height adjusting part 132 with a three-stage fixing shoulder 131 and integrally has at its central upper portion a vertical rod 133 with a connection hole 133a, a seat plate 140 which has a connection boss part 141 having at its central portion an installation hole 141a guiding the vertical rod 133 provided at the center of the fixing bracket 130, with the upper side of the seat plate 140 being connected with the lower side of the sitting seat, a rolling adjusting means 160 which passes through the rolling member 150 installed between the seat plate 140 and the fixing bracket 130 and integrally has a slope adjusting shoulder 162 at its inner diameter for being selectively engaged from the three-stage fixing shoulder 131 of the height adjusting part 132 for thereby adjusting in multiple steps the height of the seat plate 140 with respect to the rolling member 150, and a spherical plane 320 and a spherical ball bearing 321 which are engaged at the engaging bolt 170 engaged to the vertical rod 133 of the fixing bracket 130 from the upper side of the seat plate 140 and at the end portion of the vertical rod 133 for thereby guiding the movements at the central portions of the seat plate 140, comprising:

hexagonal engaging grooves 140a and 130a which are provided correspondingly at the inner diameter of the height adjusting part 132 of the fixing bracket 130 corresponding to the connection boss part 141 of the seat plate 140 engaging the rolling member 150, and said rolling member 150 is characterized in that a hexagonal engaging part 152 is formed at the upper and lower portions in a hollow shape to accommodate therein the vertical rod, and a spiral body 154 is formed between the hexagonal engaging part 152, and a compression spring 156 is provided at the inner side of the body 154 for preventing the twisting of the rolling member 150 together with the cushion function of the sitting seat.

6. A multifunctional chair according to claim 5, wherein said body 154 of the rolling member 150 is made from a rubber material of a urethane for thereby providing a rotation prevention function of a seat during a sitting type exercise.