Abstract: To achieve further weight reduction and thinning of a seat structure. A configuration in which a side frame cover 212 composed of a laminated body 1 provided with a planar member made of cloth and planar members made of synthetic resin laminated on both sides of the planar member made of cloth via adhesive agent and formed in a predetermined shape is joined to a side frame base body 211 composed of a metal member is obtained. Therefore, the thickness of the metal member used can be reduced by an amount corresponding to a strength the laminated body compensates for, which results in achievement of further weight reduction from a conventional structural member composed of only metal members that are used at the same site. Further, when an impact force is applied, the impact force can be consumed as a force that causes delamination of the laminated body from the metal member at a portion where they are joined via the adhesive agent.

Abstract: A seat has a configuration in which, in each side frame of a cushion frame, an inner frame and an outer frame which have flanges extending along peripheral edges thereof are faced to each other with a space therebetween at least partially, and the flanges are fixed by hemming process along the entire peripheral edges thereof. Since the entire peripheral edges are hemmed, the inner frame and the outer frame are securely fixed. Additionally, since the inner frame and the outer frame which are thin-plate-shaped are used, reduction in weight of each side frame can be achieved. Further, since the inner frame and the outer frame are faced to each other with a space therebetween at least partially, a compressive/tensile strength required as a side frame can be secured by inserting an expanded bead body into the space.

Abstract: To achieve further weight reduction and thinning of a seat structure. A laminated body obtained by sandwiching a planar member 4 made of cloth between planar members 2 and 3 made of synthetic resin to join them to one another via adhesive agent is used in a shell type frame member of the seat structure. Upon receipt of an impact, delamination is caused between the respective layers configuring the laminated body. Thereby, both the tensile stress and the Izod impact strength of the laminated body are lowered as compared with those of a homogeneous laminated body obtained by joining planer members made of homogeneous materials. That is, impact energy is converted to a force causing delamination between the planar members in the laminated body to be consumed, thereby absorbing the impact energy. Since the shell type frame member itself can absorb the impact, further weight reduction and thinning of the shell type frame member and a seat structure using the same can be achieved.

Abstract: A vehicle seat including: an intermediate leg portion provided between front and rear leg portions, one end portion of the rear leg portion is connected to the intermediate leg portion and provided diagonally; a connecting frame formed by connecting two short frames to each other provided between lower end portions of the front and rear leg portions, opposing end portions of the two short frames and a lower end portion of the intermediate leg portion are connected. If impact energy larger than a predetermined level is applied, a couple force acts in a direction where a connection portion between the opposing end portions of the two short frames and the lower end portion of the intermediate leg portion is pressed downward, which rotates the diagonally provided rear leg portion diagonally lower front around the lower end portion thereof, to improve impact absorbing efficiency.

Abstract: To achieve further weight reduction and thinning of a seat structure. A laminated body obtained by sandwiching a planar member 4 made of cloth between planar members 2 and 3 made of synthetic resin to join them to one another via adhesive agent is used in a shell type frame member of the seat structure. Upon receipt of an impact, delamination is caused between the respective layers configuring the laminated body. Thereby, both the tensile stress and the Izod impact strength of the laminated body are lowered as compared with those of a homogeneous laminated body obtained by joining planer members made of homogeneous materials. That is, impact energy is converted to a force causing delamination between the planar members in the laminated body to be consumed, thereby absorbing the impact energy. Since the shell type frame member itself can absorb the impact, further weight reduction and thinning of the shell type frame member and a seat structure using the same can be achieved.

Abstract: A seat has a configuration in which, in each side frame of a cushion frame, an inner frame and an outer frame which have flanges extending along peripheral edges thereof are faced to each other with a space therebetween at least partially, and the flanges are fixed by hemming process along the entire peripheral edges thereof. Since the entire peripheral edges are hemmed, the inner frame and the outer frame are securely fixed. Additionally, since the inner frame and the outer frame which are thin-plate-shaped are used, reduction in weight of each side frame can be achieved. Further, since the inner frame and the outer frame are faced to each other with a space therebetween at least partially, a compressive/tensile strength required as a side frame can be secured by inserting an expanded bead body into the space.

Abstract: To achieve further weight reduction and thinning of a seat structure. A configuration in which a side frame cover 212 composed of a laminated body 1 provided with a planar member made of cloth and planar members made of synthetic resin laminated on both sides of the planar member made of cloth via adhesive agent and formed in a predetermined shape is joined to a side frame base body 211 composed of a metal member is obtained. Therefore, the thickness of the metal member used can be reduced by an amount corresponding to a strength the laminated body compensates for, which results in achievement of further weight reduction from a conventional structural member composed of only metal members that are used at the same site. Further, when an impact force is applied, the impact force can be consumed as a force that causes delamination of the laminated body from the metal member at a portion where they are joined via the adhesive agent.

Abstract: A seat cushion of a vehicle seat has a base seat whose front end is anchored to a front frame of a frame for a sitting portion, and whose rear end is connected to a rear frame of the frame for a sitting portion via helical tension springs. A supporter, supported via helical tension springs at a pair of left and right side frames of the frame for a sitting portion, is disposed at a lower side of the base seat so as to support a femoral region of a seated person. The supporter and the helical tension springs structure an auxiliary vibration system whose mass element is a femoral region of a seated person. The auxiliary vibration system is made to function as a dynamic vibration absorber with respect to up-down vibrations of a main vibration system whose mass element is an upper body of a seated person.

Abstract: A seat includes a back part frame which is elastically deformable in a direction such that right and left side part frames are brought closer to, or moved away from, each other, and a tensile structural element which is stretched between the right and left side part frames so as to configure a backrest. Further, a headrest is provided at an upper part of the back part frame. In addition, the tensile structural element is stretched over the back part frame so as to configure a backrest, and is configured such that the back part frame is deformed so that the headrest is moved forward due to a tensile force resulting from a load imparted on the backrest.

Abstract: In order to improve seating comfort and vibration absorbency, the present invention includes a front torsion bar unit 80 disposed in the front of a seat cushion, the front end of a base net 60 is connected to a supporting frame 84 of the front torsion bar unit 80, the rear end of the base net 60 is connected to a rear frame 70. Accordingly, owing to elastic force of a front torsion bar 81 of the front torsion bar unit 80 positioned in the front of the seat cushion, a sense of stroke at the time of seating is enhanced. A structure to dispose a torsion bar unit in the front as in the present invention works upon a tiny load fluctuation sensitively, and absorbency of high frequency vibration is further enhanced.

Abstract: In order to improve seating comfort and vibration absorbency, a structure including a first torsion bar unit 70 disposed in the rear of a seat cushion, and a second torsion bar unit 80 disposed in the front of the seat cushion, and a base net 60 stretched between a rear supporting frame 74 of the first torsion bar unit 70 and a front supporting frame 84 of the second torsion bar unit 80, is provided. Owing to the elastic force of a front torsion bar 81 of the second torsion bar unit 80 positioned in the front of the seat, a sense of stroke at the time of seating is enhanced. Owing to the elastic force of a rear torsion bar 71 of the first torsion bar unit 70 positioned in the rear of the seat, similarly to the conventional structure, a load of a seated person can be sufficiently received and a stable seating comfort can be obtained.

Abstract: A flat spring member (40) mainly serving as a vibration absorptive function at a normal use is engaged with a supporting frame member (130) which displaces backward along with deformation of a seat back (20) by backward moment applied to the seat back (20), and the other end is engaged with a front edge frame (102) disposed in the vicinity of the front edge of a cushion frame. Therefore, when an impact force from front or back equal to or more than that prescribed is applied, the flat spring member (40) increases in tension by backward moment applied to the seat back (20), and serves as a function to increase again the intensity of the backward moment of the seat back (20), which was once lowered by deformation of the side frame (101) of the cushion frame.

Abstract: A vehicle seat is provided with a pair of left and right seatback side frames comprising a seatback frame. The seatback frame is connected to the rear end of a seat portion frame via a reclining mechanism. The vehicle seat is further provided with a torsion bar that is an elastic body between the reclining mechanism and the seatback frame. When the seatback frame displaces and falls forward relative to the seat portion frame, the torsion bar deforms and resists the displacement of the seatback frame. The torsion bar is arranged at the upper region of the seat occupant's pelvis.

Abstract: A seat includes a back part frame which is elastically deformable in a direction such that right and left side part frames are brought closer to, or moved away from, each other, and a tensile structural element which is stretched between the right and left side part frames so as to configure a backrest. Further, a headrest is provided at an upper part of the back part frame. In addition, the tensile structural element is stretched over the back part frame so as to configure a backrest, and is configured such that the back part frame is deformed so that the headrest is moved forward due to a tensile force resulting from a load imparted on the backrest.

Abstract: A lifter for adjusting the height of a frame 10, 12, 14 that is to be vertically movably mounted on a vehicle floor is integrally formed with a suspension unit S for absorbing vibration inputted to the frame 10, 12, 14. The suspension unit S includes a magnet unit or a magnetic fluid damper.

Abstract: A seat cushion of a vehicle seat has a base seat whose front end is anchored to a front frame of a frame for a sitting portion, and whose rear end is connected to a rear frame of the frame for a sitting portion via helical tension springs. A supporter, supported via helical tension springs at a pair of left and right side frames of the frame for a sitting portion, is disposed at a lower side of the base seat so as to support a femoral region of a seated person. The supporter and the helical tension springs structure an auxiliary vibration system whose mass element is a femoral region of a seated person. The auxiliary vibration system is made to function as a dynamic vibration absorber with respect to up-down vibrations of a main vibration system whose mass element is an upper body of a seated person.

Abstract: In order to improve seating comfort and vibration absorbency, a structure including a first torsion bar unit 70 disposed in the rear of a seat cushion, and a second torsion bar unit 80 disposed in the front of the seat cushion, and a base net 60 stretched between a rear supporting frame 74 of the first torsion bar unit 70 and a front supporting frame 84 of the second torsion bar unit 80, is provided. Owing to the elastic force of a front torsion bar 81 of the second torsion bar unit 80 positioned in the front of the seat, a sense of stroke at the time of seating is enhanced. Owing to the elastic force of a rear torsion bar 71 of the first torsion bar unit 70 positioned in the rear of the seat, similarly to the conventional structure, a load of a seated person can be sufficiently received and a stable seating comfort can be obtained. Since both the first torsion bar unit 70 and the second torsion bar unit 80work together to vibration inputted during driving, vibration absorbency is more enhanced than ever.

Abstract: In order to improve seating comfort and vibration absorbency, the present invention includes a front torsion bar unit 80 disposed in the front of a seat cushion, the front end of a base net 60 is connected to a supporting frame 84 of the front torsion bar unit 80, the rear end of the base net 60 is connected to a rear frame 70. Accordingly, owing to elastic force of a front torsion bar 81 of the front torsion bar unit 80 positioned in the front of the seat cushion, a sense of stroke at the time of seating is enhanced. A structure to dispose a torsion bar unit in the front as in the present invention works upon a tiny load fluctuation sensitively, and absorbency of high frequency vibration is further enhanced.

Abstract: This present invention discloses a seat, comprising: a seat cushion; and a seat back frame connected to the seat cushion, the seat back frames being bent in a range of specified bending angle in a direction of moving the top end backward by a backward load over a predetermined value, by way of a joint provided at an intermediate portion in the vertical direction, such that the seat back frame receives a reaction force corresponding to the bending angle.

Abstract: The seat structure includes a torsion bar as an elastic supporting-mechanism for elastically supporting a cushioning member, and is provided with arms and a supporting frame pivoted by the torsion bar. Accordingly, a device for determining a load on the seat can be structured with an extremely simple structure by providing a displacement detecting mechanism to detect the amount of twist or the twist angle of the torsion bar, or a pivot angle of the arm, displaced by being seated.