JP2021100853A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat capable of supporting an occupant stably.SOLUTION: A vehicular seat includes: a seat frame having a pair of left and right side frames 20; and a pressure receiving member 10 which is disposed between the pair of side frames 20 and supports a load from an occupant. The pressure receiving member 10 includes: a pressure receiving part 11; and support parts 12 which are provided at left and right sides of the pressure receiving part 11 and which extend in an oblique forward direction toward an outer side as seen in a lateral direction. The support part 12 has a through hole 12A and the pressure receiving part 11 has a through hole 11A. The support part 12 has a protruding part protruding in a direction away from the occupant. The support part 12 may be swung to the left and right sides with a position near a border portion between the pressure receiving part 11 and the support part 12 set to a supporting point. The vehicular seat further includes a cable 86 which is inserted into the through holes 11A, 12A and engaged at one end part with the protruding part to be fixed to the support part 12. The support part 12 is swung by the cable 86 being pulled or loosened from the pulled state.SELECTED DRAWING: Figure 15

Description

The present invention relates to a vehicle seat.

Conventionally, there has been known an automobile seat provided with side support portions on both side portions of the seat body so that the upper body of the seated person can be sandwiched and held from both side portions (see Patent Document 1).

Japanese Unexamined Patent Publication No. 61-109508

By the way, in the conventional side support device, the upper and lower arms for driving the side support portion are greatly projected from the left and right frames of the seat back, so that there is a problem that the device becomes large. Further, it is desired that the vehicle seat can stably support the occupant.

The present invention has been made in view of the above background, and an object of the present invention is to provide a vehicle seat capable of stably supporting an occupant.
Another object of the present invention is to make the side support device compact.
It also aims to improve durability and simplify the structure.
Further, the purpose is to stably support the parts and to suppress the interference of the parts.
Another object of the present invention is to widen the adjustment range of the support position by the side support device.
Another purpose is to save space for arranging parts.
Another object of the present invention is to improve the uniformity of operation of the drive device.
Moreover, the purpose is to improve the assembling property.
It also aims to improve the maneuverability of the cable.
Another object of the present invention is to prevent a load from being applied to the cable.
Another object of the present invention is to improve the drivability of the drive device.

The vehicle seat for achieving the above-mentioned object is arranged between the seat frame having a pair of side frames arranged apart from each other on the left and right and the pair of side frames, and receives pressure to support the load from the occupant. The pressure receiving member comprises a pressure receiving portion, and a support portion provided on the left and right sides of the pressure receiving portion and extending obliquely with respect to the pressure receiving portion so as to be located on the occupant side toward the left and right outer sides. The support portion has a first through hole, and the pressure receiving portion has a second through hole provided side by side with the first through hole when viewed from the occupant side, and the support portion has the support portion. Has a protruding portion that protrudes in a direction away from the occupant, the support portion can swing left and right with the vicinity of the boundary portion between the pressure receiving portion and the support portion as a fulcrum, and the vehicle seat is the first. A cable is further provided which is inserted into one through hole and the second through hole and is fixed to the support portion by engaging one end portion with the protrusion portion, and the support portion is pulled or pulled by the cable. It is characterized in that it swings by loosening from the state of being in a state of being in a state of being loose.
Further, as another form, it is a seat frame having a pair of side frames arranged apart from each other on the left and right, and includes a pressure receiving member arranged between the pair of side frames to support a load from an occupant. The pressure receiving member includes a pressure receiving portion and support portions provided on the left and right sides of the pressure receiving portion and extending obliquely with respect to the pressure receiving portion so as to be located on the occupant side toward the left and right outer sides. The left and right outer ends are arranged on the left and right inner sides of the left and right outer ends of the side frame, and the pressure receiving member is supported by a plurality of wires.

As another form, it is a vehicle seat provided with a seat cushion and a seat back, and is one of the left and right side frames constituting the left and right frames of the seat back and the left and right side frames in the seat back. A support member arranged adjacent to the side frame of the above and having a front end portion rotatable to the left and right with respect to the rear end portion, and the one side frame and the support member. Arranged between them, one end is movable along the side surface of the one side frame in a direction in which one end is close to and separated from the other end, and when the one end moves in a direction close to the other end, the one end and the other end are movable. A configuration including a pressing member that rotates the support member inward in the left-right direction by bending the intermediate portion between the other end and the support member so as to project inward in the left-right direction. can do.
According to such a configuration, the pressing member does not protrude significantly from the side frame when the intermediate portion is not bent, so that the side support device including the pressing member can be made compact.

In the vehicle seat described above, the intermediate portion has a bent portion that bends when one end moves in a direction close to the other end, and left and right formed adjacent to the bent portion with the bent portion interposed therebetween. It can be configured to have a pair of projecting portions projecting inward in the direction.

According to this, since the pair of protruding portions first come into contact with the support member and the bent portion is difficult to come into contact with the support member, it is possible to suppress the direct load from the support member to the deformed bent portion, and the durability Can be improved.

In the vehicle seat described above, the pressing member is composed of at least two parts, and a portion that bends when one end moves in a direction close to the other end is a configuration in which the two parts are rotatably connected. Can be.

According to this, the fatigue of the bent portion can be reduced as compared with the configuration in which the bent portion bends due to deformation, so that the durability can be improved.

The vehicle seat described above may be configured to support the pressing member and include a fixing member fixed to the one side frame.

According to this, it is not necessary to provide a structure for attaching the pressing member to the side frame which is usually formed of metal, so that the structure can be simplified.

In the vehicle seat described above, the support member has an upper supported portion arranged on the fixing member and a lower supported portion arranged under the fixing member, and the upper supported portion has the upper supported portion. The lower supported portion may be rotatably supported by the fixing member.

According to this, since the fixing member and the pressing member supported by the fixing member (that is, the configuration for driving the supporting member) can be made compact, the side support device can be made more compact as a whole.

In the vehicle seat described above, the rear end portion of the one side frame is bent inward in the left-right direction, and the fixing member is in contact with the inner surface of the rear end portion of the one side frame. It can be configured to be fixed to the side portion of the one side frame.

According to this, since the fixing member is supported by both the side portion and the rear end portion of the side frame, the support rigidity of the fixing member can be improved, so that the occupant can be stably supported.

In the vehicle seat described above, the support member may be configured to have reinforcing ribs.

According to this, since the rigidity of the support member can be improved, the occupant can be stably supported.

The vehicle seat described above includes an airbag device for protecting an occupant from the side, and a force cloth for restricting the deployment direction of the bag body of the airbag device, and the one side frame is the above-mentioned one side frame. It can be configured to have two vertically offset force cloth mounting portions for mounting the force cloth.

According to this, the force cloth can be stably supported by the force cloth attachment portions at the upper and lower positions.

In the vehicle seat described above, the rotation shaft of the support member is arranged at a position where it overlaps with the rear end of the one side frame when viewed from the left-right direction or behind the rear end of the one side frame. It can be configured.

According to this, the amount of rotation of the support member can be increased as compared with the configuration in which the rotation shaft of the support member is arranged on the front side of the rear end of the side frame, so that the adjustment range of the support position by the side support device is widened. can do.

In the vehicle seat described above, the support member has a plate-shaped portion at least on the edge of the front end portion, and the plate-shaped portion has a plate-shaped portion along the edge of the plate-shaped portion from other portions of the plate-shaped portion. It can be configured so that a thick bead is formed.

According to this, damage to the cushion material provided in the seat back due to the rotation of the support member is suppressed, so that the durability can be improved.

The vehicle seat described above includes a vehicle drive mechanism that drives the drive device by pulling or loosening the cable from the pulled state by the drive force from the drive force generator, and the vehicle drive mechanism is the first. A first driving device in which one end of the first cable is engaged with the cable and the second cable, and the other end of the first cable is pulled or loosened from the pulled state, and the second driving device. It has a second driving device in which one end of a cable is engaged and the other end of the second cable is pulled or loosened from the pulled state, and the one end of the first cable and the first The other end of the two cables may be connected.

According to this, since one end of the first cable and the other end of the second cable are connected, the first cable and the second cable can be treated as one cable, so to speak. As a result, for example, the number of cables extending from the driving force generator can be reduced, so that the space for arranging the cables can be saved. Further, as compared with the conventional technique in which the two cables individually extend from the actuator, branch in the middle, and are connected to the drive device, it is easy to make the stroke when the two cables operate uniform. Therefore, the uniformity of operation of the two drive devices can be improved.

In the vehicle seat described above, the first cable has an engaging portion for engaging one end of the first cable with the first driving device, and the second cable is attached to the engaging portion. It is configured to be engageable, and may have a connecting portion that connects the other end of the second cable to one end of the first cable when engaged with the engaging portion.

According to this, since the first cable and the second cable can be easily connected, the assembling property can be improved.

In the vehicle seat described above, the first cable and the second cable may be integrally formed.

According to this, since the number of parts can be reduced, the assembling property can be improved.

In the vehicle seat described above, the direction in which one end of the first cable enters the first drive device and the direction in which one end of the second cable enters the second drive device may be the same. it can.

According to this, it becomes easy to make the configurations of the first drive device and the second drive device symmetrical, so that the uniformity of operation of the two drive devices can be further improved.

In the vehicle seat described above, the second cable may be configured such that one end of the first cable is pulled out from the first drive device on the side opposite to the side where the first drive device enters. ..

According to this, since the first cable and the second cable can be arranged in a straight line in the first drive device, the manageability of the cables can be improved.

The vehicle seat includes a first frame and a second frame, the other end of the first cable is connected to the driving force generator, and the driving force generator and the first driving device are described. Attached to the first frame, the second drive is attached to the second frame, the first cable is arranged to operate along the longitudinal direction of the first frame, and the second cable is , The configuration may be arranged so as to operate along the longitudinal direction of the second frame.

According to this, since the first cable can be shortened, the space for arranging the first cable can be saved. Further, since the cables can be arranged along the frame, the space for arranging the cables can be further reduced.

In the vehicle seat described above, the first frame constitutes one of the left and right side frames, the second frame constitutes the other of the left and right side frames, and the first frame and the first frame. It is arranged between the two frames and includes a load-bearing member for supporting the load from the occupant, and the second cable may be configured to pass behind or under the load-bearing member.

According to this, even when a load is applied to the load supporting member from the occupant, it is possible to suppress the load from being applied to the second cable.

In the vehicle seat described above, at least one of the first drive device and the second drive device moves in a direction in which one end to which one end of the cable is connected is close to and separated from the other by the operation of the cable. It is possible, and the cable has a bending member that bends so that an intermediate portion between the one end and the other end projects in a predetermined direction when the one end moves in a direction close to the other end. , The bent member may be arranged along the bent member on the side opposite to the predetermined direction.

According to this, it is possible to suppress the interference between the intermediate portion of the bending member and the cable. Further, by suppressing the interference between the intermediate portion of the bending member and the cable, it is possible to suppress the load applied to the cable when the intermediate portion of the bending member is bent.

In the vehicle seat described above, at least one of the first driving device and the second driving device has a moving member that moves by being pressed against the intermediate portion by bending the bending member, and the moving member. Can be configured to cover the engaging portion between one end of the cable and the one end of the bending member.

According to this, by being covered with the moving member, it is possible to suppress the load from being applied to the cable, more specifically, the engaging portion between one end of the cable and one end of the bending member.

The vehicle seat described above may be configured to include a guide portion for guiding the movement of the one end of the bending member.

According to this, since one end of the bending member can be moved satisfactorily, the drivability of the driving device having the bending member can be improved.

It is a perspective view of the vehicle seat as an example of the vehicle seat which concerns on embodiment. It is a perspective view of the frame built in the vehicle seat. It is a front view of a seat back frame. It is an exploded perspective view of the side support device. It is a cross-sectional view which shows the structure of the side support device and its periphery before driving. It is a vertical cross-sectional view of a side support device, and is a figure (a) which shows before driving and a figure (b) which shows after driving. It is the figure which looked at the support member from the surface side. It is a cross-sectional view which shows the structure around the airbag device. It is a figure (a), (b) explaining the 1st cable and the 2nd cable. It is a cross-sectional view which shows the structure of the side support device and its periphery after driving. It is a vertical cross-sectional view which shows the structure of the pressing member which concerns on the 1st modification and its periphery, and is the figure (a) which shows before driving, and the figure (b) which shows after driving. It is a figure which looked at the support member which concerns on the 2nd modification from the back surface side. It is a figure (a), (b) explaining the cable which concerns on the 3rd modification. It is a perspective view of the seat back frame which concerns on 4th modification. It is sectional drawing of the side support structure which concerns on 4th modification. It is a cross-sectional view of the side support device which concerns on 5th modification, it is the figure (a) which shows before driving, and the figure (b) which shows after driving. It is a figure (a), (b) explaining the holding structure of the cable which concerns on 5th modification.

Next, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, the automobile as a vehicle in the present embodiment includes a vehicle seat S as an example of a vehicle seat used for a driver's seat, a passenger seat, or the like. The vehicle seat S is mainly composed of a seat cushion S1 on which the occupant sits, a seat back S2, and a headrest S3 that supports the occupant's head.

As shown in FIG. 2, the seat back S2 includes a metal seat back frame F2 constituting the seat frame F, a side support drive mechanism 1 as an example of a vehicle drive mechanism, and a plate-shaped pressure receiving member as a load support member. A member 10 and an airbag device AB for protecting an occupant from the side are mainly provided, and a cushion material 70 made of urethane foam or the like and a skin material 75 made of synthetic leather or cloth are provided so as to cover them. It is configured by covering the seat back frame F2 (see FIGS. 5 and 8).

The seat back frame F2 includes left and right side frames 20 that form the left and right frames of the seat back S2. The left and right side frames 20 include a left side frame 20L as an example of the first frame constituting the left frame of the backrest and a right side frame 20R as an example of the second frame constituting the right frame of the backrest. In this embodiment, the left side frame 20L and the right side frame 20R are formed substantially symmetrically.

The pressure receiving member 10 is a member for supporting the load from the occupant, is arranged between the left side frame 20L and the right side frame 20R, and retreats to the left and right side frames 20 via the upper and lower support wires W1 and W2. It is movably connected. When a load of a predetermined value or more is applied to the seat back S2 from the upper body of the occupant due to a collision of another vehicle with the rear portion of the own vehicle, the pressure receiving member 10 bends the support wires W1 and W2 or links. The support wire W2 moves backward due to the swing of the mechanism (reference numeral omitted), so that the support wire W2 moves backward with respect to the left and right side frames 20. As a result, the upper body of the occupant sinks into the seat back S2, so that the influence of the load such as when the occupant collides with the occupant can be alleviated.

The side support drive mechanism 1 is a mechanism for driving the support member 50 as an example of the moving members provided on the left and right sides in the seat back S2. The support members 50 are arranged so as to face each other in the vicinity of the portion under the base of the arm of the occupant seated on the vehicle seat S, and the upper body of the occupant is viewed from the left and right via the cushion material 70 and the skin material 75. I support it. In the vehicle seat S of the present embodiment, the front end portion of the support member 50 is rotated left and right by the side support drive mechanism 1, so that the portion of the seat back S2 facing the vicinity of the portion under the base of the occupant's arm is the occupant. Inflate toward or withdraw from the inflated state. This makes it possible to adjust the support position according to the body shape of the occupant.

As shown in FIG. 3, the side support drive mechanism 1 includes an actuator AC as a driving force generator, a left side support device 3L as an example of the first drive device, and a right side support device 3R as an example of the second drive device. , The first cable 81 and the second cable 82 are mainly provided. In the present embodiment, the left side support device 3L is attached to the inside of the left side frame 20L, and the actuator AC is attached to the outside of the left side frame 20L. Further, the right side support device 3R is attached to the inside of the right side frame 20R in a state of facing the left side support device 3L.

Although the details will be described later, the first cable 81 is a member that transmits the driving force of the actuator AC to the left side support device 3L, one end of which is engaged with the left side support device 3L, and the other end of which is directly connected to the actuator AC. It is connected. Further, the second cable 82 is a member that transmits the driving force of the actuator AC to the right side support device 3R via the first cable 81, one end of which is engaged with the right side support device 3R, and the other end of which is the left side support. It is connected to one end of the first cable 81 in the device 3L. As a result, the support member 50 of the left side support device 3L is driven by pulling or loosening the other end of the first cable 81 by the driving force from the actuator AC, and also via the first cable 81. The other end of the second cable 82 is pulled or loosened from the pulled state, thereby driving the support member 50 of the right side support device 3R.

In the present embodiment, the second cable 82 extends from the left side support device 3L, passes behind the pressure receiving member 10, and is connected to the right side support device 3R. As a result, even when a load is applied to the pressure receiving member 10 from the occupant, it is possible to prevent the second cable 82 from being directly loaded. Further, in the present embodiment, the second cable 82 is fastened between two left and right openings 18 formed in the pressure receiving member 10 by the binding band 91. As a result, the movement of the second cable 82 can be suppressed when the second cable 82 is pulled, so that the interference between the second cable 82 and other members such as the support wire W1 is suppressed, and the generation of abnormal noise is suppressed. can do.

The left and right side support devices 3L and 3R are mainly composed of a fixing member 30 fixed to one corresponding side frame 20, a pressing member 40 as an example of a bending member, and a support member 50, respectively. There is. In addition, in this embodiment, since the left and right side support devices 3L and 3R are configured substantially symmetrically, the detailed configuration of the left side support device 3L attached to the left side frame 20L will be mainly described in the following description. To do.

As shown in FIG. 4, the fixing member 30 is a member for supporting the pressing member 40 and the supporting member 50 and fixing them to the side frame 20 (not shown in FIG. 4). In the present embodiment, the fixing member 30 is a substantially instrument-shaped fixing member main body 30A having an opening in the left-right direction, and an upper portion extending diagonally rearward from an end portion of the rear wall of the fixing member main body 30A in the left-right direction. It is configured to have an extension portion 30B and a lower extension portion 30C.

A shaft support portion 31 that rotatably supports the upper end 42 of the pressing member 40, which will be described later, is formed on the upper portion of the fixing member main body 30A. Further, the fixing member main body 30A is a guide portion 32 for guiding the vertical movement of the lower end 41 of the pressing member 40. The guide portion 32 is a surface facing inward in the left-right direction of the side wall 30D constituting the guide portion 32, and has a guide surface 32A that mainly guides the movement of the lower end 41 of the pressing member 40. As shown in FIG. 5, the guide surface 32A is inclined so as to spread horizontally from the rear end portion to the front end portion so that the front end portion is located outside in the left-right direction with respect to the rear end portion. As a result, the guide surface 32A is in a state of facing the occupant seated on the vehicle seat S rather than being parallel to the front-rear direction. Further, as shown in FIGS. 6A and 6B, the upper end portion and the lower end portion of the side wall 30D are penetrated to screw the screws 92 when fixing the fixing member 30 to the side frame 20, respectively. Holes 30E are formed one by one.

As shown in FIG. 4, shaft portions 33 extending in the vertical direction are formed at the ends of the upper and lower extending portions 30B and 30C. More specifically, the shaft portion 33A is formed so as to project upward from the upper surface of the upper extending portion 30B, and the shaft portion 33B is coaxial with the shaft portion 33A and protrudes downward from the lower surface of the lower extending portion 30C. Is formed in. Further, the shaft portion 33C is formed so as to be coaxial with the shaft portions 33A and 33B and to connect the upper and lower extending portions 30B and 30C. These shaft portions 33A to 33C (shaft portions 33) are portions that function as shafts that rotatably support the support member 50, and are integrally formed with the fixing member 30 as a part of the fixing member 30. As a result, the number of parts can be reduced as compared with the configuration in which the shaft is provided separately from the fixing member, so that the structures of the side support devices 3L and 3R can be simplified.

The pressing member 40 is a member for driving the support member 50, and mainly has a lower end 41 at one end, an upper end 42 at the other end, and an intermediate portion 43 between the lower end 41 and the upper end 42. ing. As shown in FIGS. 6A and 6B, the upper end 42 of the pressing member 40 is rotatably supported with respect to the fixing member 30 (side frame 20), and the details will be described later, but the lower end 41 One end of the first cable 81 is connected to the cable 81. As a result, the pressing member 40 can move up and down along the guide surface 32A (side surface of the side frame 20) with respect to the upper end 42 to which the lower end 41 is fixed by the operation of the first cable 81. It is configured in.

The intermediate portion 43 is configured to be bendable so as to project inward in the left-right direction (predetermined direction) when the lower end 41 moves upward in a direction close to the upper end 42. More specifically, the intermediate portion 43 is a pair of a bent portion 43A that bends when the lower end 41 moves in a direction close to the upper end 42 and a pair formed adjacent to the upper and lower sides of the bent portion 43A with the bent portion 43A interposed therebetween. Mainly has a protruding portion 43B of. The bent portion 43A is formed to be thinner than the other portions of the pressing member 40 so that it can be bent and deformed. The pair of protruding portions 43B are formed in a rib shape that protrudes inward in the left-right direction from the bent portion 43A in a state before the bent portion 43A shown in FIG. 6A is bent.

As shown in FIG. 5, the support member 50 is a substantially plate-shaped member that supports the vicinity of the portion under the base of the occupant's arm via the skin material 75 and the cushion material 70, and is a fixing member 30 (side frame 20). ), The front end is rotatably configured around the rear end. More specifically, as shown in FIG. 4, the support member 50 has an upper supported portion 51 arranged on the upper extending portion 30B of the fixing member 30 and a lower extending portion of the fixing member 30 at the rear end portion. It has a lower supported portion 52 arranged under the portion 30C, and a shaft engaging portion 53 formed between the upper supported portion 51 and the lower supported portion 52. Then, the recesses 51A and 52A formed in the upper and lower supported portions 51 and 52 engage with the shaft portions 33A and 33B, and the shaft engaging portion 53 engages with the shaft portion 33C, whereby the upper supported portion 51 , The lower supported portion 52 and the shaft engaging portion 53 are rotatably supported with respect to the fixing member 30. In the present embodiment, since the shaft portions 33A and 33B have a substantially barrel-shaped cross-sectional shape, when the support member 50 is largely rotated inward in the left-right direction with respect to the fixing member 30, the upper and lower covers are covered. Although it can be easily disengaged from the support portions 51 and 52, the support member 50 is prevented from falling off from the fixing member 30 because the shaft engaging portion 53 is engaged with the shaft portion 33C.

The support member 50 has a continuous substantially U-shape that is thinner than the upper and lower supported portions 51 and 52 at the edge of the range from the vicinity of the center of the upper end portion to the vicinity of the center of the lower end portion through the front end portion. It has a plate-shaped portion 54. Then, the plate-shaped portion 54 is formed with a bead 54A that is thicker than the other portion of the plate-shaped portion 54 by swelling toward the front side of FIG. 4 along the edge of the plate-shaped portion 54. .. As shown in FIG. 5, the bead 54A is formed so as to form a substantially arc-shaped rounded cross-sectional shape.

As shown in FIGS. 4 and 7, the support member 50 has a plurality of reinforcing ribs 55 on the front surface 50A for supporting the occupant and the back surface 50B on the opposite side of the front surface 50A. In the present embodiment, the reinforcing rib 55 on the back surface 50B is formed so as to extend in the vertical direction or the horizontal direction, and a part thereof intersects in a cross shape. In other words, the support member 50 has a plurality of recesses 56 on the front surface 50A and the back surface 50B, respectively, and a plurality of reinforcing ribs 55 are provided so as to partition the recesses 56. It is formed. With such a configuration, the rigidity of the support member 50 can be improved, so that the occupant seated on the vehicle seat S can be stably supported. The recess 56A formed near the center of the back surface 50B extends long in the vertical direction, and as shown in FIGS. 6A and 6B, has a function of guiding the movement of the intermediate portion 43 of the pressing member 40. have.

The fixing member 30, the pressing member 40, and the supporting member 50 described above are assembled and then fixed to the inner surface of the side frame 20 as the side support devices 3L and 3R as shown in FIG. More specifically, the side frame 20 has a substantially U-shape in which the front end portion 20A and the rear end portion 20C bend inward in the left-right direction with respect to the side portion 20B, and the side frame 20 has a substantially U-shape on the rear surface of the fixing member 30. , A plurality of contact ribs 35 projecting rearward are formed side by side in the vertical direction (only one is shown). Then, the fixing member 30, that is, the side support devices 3L and 3R, is fixed to the side portion 20B of the side frame 20 by the screw 92 in a state where the contact rib 35 is in contact with the inner surface of the rear end portion 20C of the side frame 20. There is. As a result, the side support devices 3L and 3R are supported by both the side portion 20B and the rear end portion 20C, so that the support rigidity can be improved, and the occupant can be stably supported by the support member 50.

When the side support devices 3L and 3R are fixed to the side frame 20, the support member 50 is arranged adjacent to the inside of one side frame 20 in the left-right direction in the seat back S2, and the pressing member 40 is one side frame. It will be arranged between the 20 and the support member 50. Further, in the present embodiment, substantially the entire rotation shaft of the support member 50, that is, the shaft portion 33 of the fixing member 30, is arranged on the rear side of the rear end (see the chain line) of the side frame 20. As a result, the amount of rotation of the support member 50 can be increased as compared with the configuration in which the shaft portion 33 is arranged on the front side of the rear end of the side frame 20, so that the adjustment range of the support position by the side support devices 3L and 3R is widened. can do.

As shown in FIG. 2, in the present embodiment, the left and right side support devices 3L and 3R (fixing members 30) are fixed to the side frame 20 between two mounting holes 25 in the vertical direction. The mounting hole 25 is a through hole as a force cloth mounting portion for allowing the force cloths 61 and 62 (see FIG. 8) that regulate the deployment direction of the bag body of the airbag device AB to be attached to the side frame 20. , One at the upper end and one at the lower end of the side frame 20 are formed so as to be vertically displaced.

Here, the configuration around the airbag device AB in the seat back S2 will be briefly described. As shown in FIG. 8, the airbag device AB is configured to include a bag body (not shown), an inflator, and the like, and is fixed to the right side frame 20R via a support plate 26. The force cloths 61 and 62 are arranged so as to surround the airbag device AB, and the front end portion is sewn together with the skin material 75 at the break portion 76 of the skin material 75, and the rear end portion is fixed to the right side frame 20R. There is. When the airbag device AB operates, the bag body that expands due to the gas generated by the inflator expands forward while being guided by the left and right force cloths 61 and 62, and breaks the fractured portion 76 to occupy the occupant. It will be deployed on the side of.

The upper and lower portions (only one of them is shown) of the rear end of the force cloth 61 are fixed to the rivet-shaped force cloth mounting member 27, and the upper and lower force cloth mounting members 27 are engaged with the upper and lower mounting holes 25 of the right side frame 20R. By fitting, it is fixed to the right side frame 20R. The force cloth mounting member 27 is made of resin or the like, and has two through holes 27B and 27C in the body portion 27A. The rear end of the force cloth 61 is passed through the through hole 27B from the outside to the inside in the left-right direction in FIG. 8, and then fixed to the rod-shaped pin 27D and locked to the through hole 27C together with the pin 27D. , It is fixed to the force cloth mounting member 27. The body portion 27A of the force cloth mounting member 27 is formed with a retaining portion 27E for preventing the force cloth mounting member 27 from falling out of the mounting hole 25. On the other hand, in the force cloth 62, the upper and lower portions (only one of them is shown) at the rear end thereof are fixed to the hook-shaped force cloth attachment member 28 formed of resin or the like, and the upper and lower force cloth attachment members 28 are attached to the right side frame 20R. It is fixed to the right side frame 20R by hooking on the end of the rear end portion 20C.

In the present embodiment, since the two mounting holes 25 are formed so as to be offset vertically, the force cloth 61 can be stably supported by the two mounting holes 25 at the top and bottom. Further, in the present embodiment, since the side support devices 3L and 3R are fixed to the side frame 20 between the upper and lower two mounting holes 25, the interference between the force cloth mounting member 27 and the screw 92 can be suppressed, and the two The side support devices 3L and 3R can be made more compact than the structure in which the side support devices are fixed above and below the mounting holes 25.

As shown in FIG. 4, the first cable 81 and the second cable 82 can slide on the tubular sheaths 81B and 82B, respectively, with one end and the other end (only one of which is shown) exposed to the outside. It is inserted in. Each of the cables 81 and 82 has an engaging portion 83 at one end thereof (only the first cable 81 is shown) for engaging the one end portion of the cables 81 and 82 with the pressing member 40 of the side support devices 3L and 3R. doing. The engaging portion 83 is a metal member having a substantially cylindrical shape, and is fixed to one end of each of the cables 81 and 82 (see also FIG. 9). On the other hand, the second cable 82 has a connecting portion 84 at the other end for connecting the other end of the second cable 82 to one end of the first cable 81. The connecting portion 84 is a metal plate having a circular engaging hole 84A that can be engaged with the engaging portion 83, and is fixed to the other end of the second cable 82.

As shown in FIG. 9A, in the present embodiment, the first cable 81 and the second cable 82 engage the engaging portion 83 of the first cable 81 with the connecting portion 84 of the second cable 82. , Connected to each other. As described above, in the present embodiment, the first cable 81 and the second cable 82 can be easily connected by engaging the engaging portion 83 and the connecting portion 84, so that the side support drive mechanism 1 and the vehicle seat S can be assembled. Can be improved.

As shown in FIG. 3, the first cable 81 has other ends wound around a reel (not shown) provided in the actuator AC, and is pulled out upward from the inside of the actuator AC. The first cable 81 is arranged along the outer surface of the left side frame 20L, is curved above the left side support device 3L, passes behind the seat back frame F2, and one end thereof is inside the left side support device 3L. It's in from the top. As shown in FIGS. 9A and 9B, the first cable 81 that has entered the left side support device 3L is a left side support device when the engaging portion 83 is engaged with the lower end 41 of the pressing member 40. Engaged in 3L.

Returning to FIG. 3, the second cable 82 is pulled out from the left side support device 3L on the lower side opposite to the upper side on which one end of the first cable 81 enters the left side support device 3L. As a result, the first cable 81 and the second cable 82 can be arranged in a straight line in the left side support device 3L, so that the manageability of the cables 81 and 82 in the left side support device 3L can be improved. The second cable 82 pulled out from the left side support device 3L is arranged so that the rear side of the pressure receiving member 10 faces diagonally upward to the right, and one end thereof enters the right side support device 3R from above. As shown in FIGS. 9A and 9B, the second cable 82 that has entered the right side support device 3R is a right side support device when the engaging portion 83 is engaged with the lower end 41 of the pressing member 40. Engaged in the 3Rs.

As shown in FIGS. 6A and 6B, each of the cables 81 and 82 is located on the lateral side opposite to the lateral inner side on which the intermediate portion 43 protrudes from the intermediate portion 43 of the pressing member 40. Is arranged along the pressing member 40 (intermediate portion 43). As a result, the interference between the bending intermediate portion 43 and the cables 81 and 82 is suppressed, so that it is possible to suppress the load applied to the cables 81 and 82 when the intermediate portion 43 is bent. Further, since the engaging portion between one end of the cables 81 and 82 and the lower end 41 of the pressing member 40 is covered by the support member 50, the cables 81 and 82 and the cables 81 and 82 are engaged with the pressing member 40. It is possible to prevent the load from being applied to the joint portion by the occupant.

Next, while explaining the operation of the vehicle seat S configured as described above, the action and effect of the vehicle seat S of the present embodiment will be described.
In the state shown in FIGS. 5 and 6A, the other end of the first cable 81 is wound up by the occupant operating a controller (not shown) to rotate a reel (not shown) in the actuator AC in one direction. Then, one end of the first cable 81 and one end of the second cable whose other end is connected to the first cable 81 are pulled together.

Then, as shown in FIG. 6B, the lower end 41 of the pressing member 40 with which one end of each of the cables 81 and 82 (only one of them is shown) is engaged moves in the direction close to the upper end 42, and the intermediate portion 43 Bends so that it protrudes inward in the left-right direction. As a result, the support member 50 is pressed against the intermediate portion 43, so that the front end portion of the support member 50 rotates inward in the left-right direction about the shaft portion 33, as shown in FIG. As a result, the cushion material 70 and the skin material 75 are pressed by the support member 50 and swell toward the occupant side, so that the support position of the occupant can be changed.

In the present embodiment, since the first cable 81 and the second cable 82 are connected, they can be operated as one cable, so that, for example, the two cables individually extend from the actuator. The stroke when the cables 81 and 82 are operated can be made uniform as compared with the configuration in which the cables are taken out and branched in the middle and are connected to the side support devices respectively. As a result, the uniformity of operation of the left and right side support devices 3L and 3R can be improved.

Further, as shown in FIG. 3, the direction in which one end of the first cable 81 enters the left side support device 3L and the direction in which one end of the second cable 82 enters the right side support device 3R are the same, so that the left and right sides are the same. It is easy to make the configurations of the side support devices 3L and 3R symmetrical, and in the present embodiment, the left and right side support devices 3L and 3R are actually configured substantially symmetrically. As a result, the uniformity of operation of the left and right side support devices 3L and 3R can be further improved.

On the other hand, in the state shown in FIG. 10, the occupant operates a controller (not shown) to rotate the reel in the actuator AC in the direction opposite to the one direction, so that the winding state of the other end of the first cable 81 is changed. When loosened, one end of the first cable 81 and one end of the second cable are both pulled and loosened.

Then, as shown in FIG. 5, the front end portion of the support member 50 rotates outward in the left-right direction around the shaft portion 33 due to the load from the occupant and the restoring force of the skin material 75 and the cushion material 70. At this time, when the pressing member 40 is pushed by the support member 50, the shape of the bent intermediate portion 43 returns from the state shown in FIG. 6 (b) to the state shown in FIG. 6 (a), and the lower end 41 is a cable. While pulling one end of 81, 82, it moves in a direction away from the upper end 42. As a result, the cushion material 70 and the skin material 75 can be retracted from the inflated state, and the support position of the occupant can be changed.

In the vehicle seat S, the support position by the support member 50 is adjusted according to the body shape of the seated occupant by adjusting the drive amount of the actuator AC by operating the controller, in other words, FIG. The amount of swelling of the portion (the portion where the support member 50 is arranged) facing the vicinity of the portion under the base of the occupant's arm of the seat back S2 shown in the above can be arbitrarily adjusted.

In the present embodiment, since the guide portion 32 for guiding the movement of the lower end 41 of the pressing member 40 and the recess 56A for guiding the movement of the intermediate portion 43 are provided, the lower end 41 and the intermediate portion 43 can be moved satisfactorily. Can be done. As a result, the driveability of the side support devices 3L and 3R can be improved. Further, in the present embodiment, since the guide surface 32A of the guide portion 32 is inclined so as to face the occupant with respect to the front-rear direction, the guide surface 32A and the occupant face each other, and the pressing member 40 and the support member The occupant can be supported in a well-balanced manner through the 50 and the like. Further, in the present embodiment, since the intermediate portion 43 of the pressing member 40 is arranged so as to abut on the bottom surface of the recess 56A, that is, near the center of the support member 50, the intermediate portion 43 stably supports the support member 50. This allows the occupants to be stably supported.

Further, in the present embodiment, as shown in FIGS. 5 and 10, a bead 54A thicker than other portions of the plate-shaped portion 54 is formed on the edge of the plate-shaped portion 54 of the support member 50. Therefore, damage to the cushion material 70 due to the rotation of the support member 50 can be suppressed. Further, in the present embodiment, as shown in FIGS. 6A and 6B, in the pressing member 40, the pair of protruding portions 43B first come into contact with the support member 50, and the bent portion 43A is unlikely to come into contact with the support member 50. Therefore, it is possible to prevent the support member 50 from directly applying a load to the deformed bent portion 43A. As a result, the durability of the vehicle seat S provided with the side support drive mechanism 1 can be improved.

In the vehicle seat S described above, as shown in FIG. 6A, the pressing member 40 does not protrude significantly from the side frame 20 when the intermediate portion 43 is not bent. Therefore, such a pressing member The side support devices 3L and 3R including the 40 can be made compact to the left and right. Further, as shown in FIG. 4, since the fixing member 30 has a size that can be arranged between the upper and lower supported portions 51 and 52 of the supporting member 50, the fixing member 30 and the pressing member 40 supported by the fixing member 30 That is, the configuration for driving the support member 50 can be made compact up and down. As a result, in the present embodiment, the side support devices 3L and 3R can be made compact as a whole.

Further, in the vehicle seat S, as shown in FIG. 3, since the first cable 81 and the second cable 82 are connected, they can be handled as one cable, so that they extend from the actuator AC. The number of cables can be one. Further, since the actuator AC and the left side support device 3L are attached to the same left side frame 20L, the first cable 81 can be shortened. Further, in the present embodiment, one end of the first cable 81 is arranged so as to operate along the longitudinal direction of the left side frame 20L, and one end of the second cable 82 is arranged along the longitudinal direction of the right side frame 20R. Since the cables 81 and 82 are arranged so as to operate, the cables 81 and 82 can be arranged along the side frames 20L and 20R as a whole. As a result, it is possible to save space for arranging the cables 81 and 82 in the vehicle seat S.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The specific configuration can be appropriately changed as described below without departing from the spirit of the present invention.

The configurations of the side support devices 3L and 3R shown in the above embodiment are examples, and the present invention is not limited to the configurations of the above embodiment. For example, in the above embodiment, the pressing member 40 and the supporting member 50 are fixed to the side frame 20 via the fixing member 30, but the pressing member and the supporting member are directly fixed to the side frame without providing the fixing member. You may be. By providing the fixing member 30 as in the above embodiment, it is not necessary to provide a configuration for attaching the pressing member 40 or the like to the metal side frame 20, so that the structure of the side frame 20 can be simplified and easily manufactured. can do.

Further, in the above-described embodiment, the pressing member 40 is composed of one component, but the present invention is not limited to this, and the pressing member may be composed of two or more components. As an example, as shown in FIGS. 11A and 11B, the pressing member 40 is composed of two parts, a pressing member lower portion 40A and a pressing member upper portion 40B, and when the lower end 41 moves in a direction close to the upper end 42. The portion that bends in the direction may be rotatably connected to the shaft portion 44 formed in one of the pressing member lower portion 40A and the pressing member upper portion 40B. According to such a configuration, the fatigue of the bent portion can be reduced as compared with the configuration in which the bent portion bends due to deformation, so that the durability of the pressing member 40 can be improved. Further, the support member 50 may be formed so that the reinforcing ribs 55 form a honeycomb structure, for example, as shown in FIG.

In the above embodiment, the first cable 81 and the second cable 82 are two cables configured as separate parts, but the present invention is not limited to this, and for example, FIGS. 13 (a) and 13 (b). As shown in the above, the first cable and the second cable may be one cable 85 integrally formed. According to this, since the number of parts can be reduced, the assembling property of the side support drive mechanism 1 and the vehicle seat S can be improved, and the cost can be reduced. Supplementally, the cable 85 shown in FIG. 13 has an engaging portion 83 engaged with the pressing member 40 of the right side support device 3R at one end, and is engaged with the pressing member 40 of the left side support device 3L in the middle portion. It has an engaging portion 83. The cable 85 corresponds to the first cable of the present invention from the other end to the engaging portion 83 in the middle portion to which the actuator is connected, which can be called the first cable portion, and the engaging portion 83 to the one end portion in the middle portion. The engaging portion 83 corresponds to the second cable of the present invention, which can also be called the second cable portion.

In the above embodiment, as shown in FIG. 5, the configuration in which the rotation shaft of the support member 50 (the shaft portion 33 of the fixing member 30) is arranged behind the rear end of the side frame 20 is illustrated. The present invention is not limited to this. For example, the rotation shaft of the support member may be arranged at a position overlapping the rear end of the side frame when viewed from the left-right direction. This also makes it possible to increase the amount of rotation of the support member as compared with the configuration in which the rotation shaft is arranged on the front side of the rear end of the side frame.

In the above embodiment, as shown in FIG. 3, the second cable 82 is fastened to the pressure receiving member 10, but the present invention is not limited to this, for example, the second cable is fastened to the side frame 20. It may be arranged without being fastened. Further, in the above embodiment, the second cable 82 passes after the pressure receiving member 10, but the present invention is not limited to this, and for example, the second cable may pass under the pressure receiving member 40. Good. This also makes it possible to prevent the occupant from applying a load to the second cable. Further, in the above-described embodiment, the plate-shaped pressure receiving member 10 is exemplified as the load supporting member, but the present invention is not limited to this, and for example, a wire-shaped seat spring or the like may be used.

In the above embodiment, as shown in FIG. 2, the airbag device AB is attached to the right side frame 20R and the actuator AC is attached to the left side frame 20L, but the present invention is not limited to this, for example. , The arrangement may be the reverse of the above embodiment. Further, the airbag device and the actuator may be mounted on the same side frame. Further, the actuator may be provided in the seat cushion S1 (see FIG. 1). Further, in the above-described embodiment, the electric actuator AC is exemplified as the driving force generating device, but the present invention is not limited to this. For example, in the driving force generating device, the occupant winds up the cable by turning the handle. It may be configured so that it can be loosened or loosened.

In the above-described embodiment, the vehicle seat S used in an automobile is exemplified as the vehicle seat, but the present invention is not limited to this, and other vehicle seats, for example, a seat used in a ship, an aircraft, or the like. It may be.

In the above embodiment, the first frame constitutes the left side frame 20L and the second frame constitutes the right side frame 20R, but the present invention is not limited to this, for example, the first frame is the right side frame. The second frame may constitute the left side frame. Further, for example, the first frame may form the frame of the seat cushion, and the second frame may form the frame of the seat back.

In the above embodiment, the side support drive mechanism 1 is exemplified as the vehicle drive mechanism. In other words, in the above-described embodiment, the side support devices 3L and 3R are exemplified as the drive device. However, the present invention is not limited to this, and for example, the drive device may be a device other than the side support device. Further, the first drive device and the second drive device may be devices having the same configuration (including a symmetrical configuration) or devices having different configurations.

Next, a fourth modification and a fifth modification will be described. In the following embodiments, the same components as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

First, a fourth modification will be described. As shown in FIG. 14, in the present embodiment, the pressure receiving member 10 extends from the plate-shaped pressure receiving portion 11 facing the back of the occupant and the upper parts of the left and right ends of the pressure receiving portion 11 diagonally forward in the left-right direction. It integrally has left and right support portions 12 formed in a plate shape. Each support portion 12 has a through hole 12A near the central portion thereof, and the pressure receiving portion 11 has a through hole 11A at substantially the same height position as the through hole 12A at both left and right ends thereof.

The pressure receiving member 10 is formed so as to be elastically deformable from a resin or the like, whereby as shown in FIG. 15, each support portion 12 (only one of them is shown) is located near the boundary portion between the pressure receiving portion 11 and the support portion 12. It can swing left and right with the fulcrum as a fulcrum. The support portion 12 swings when the cable 86 is pulled or loosened from the pulled state by the driving force from the actuator AC (see FIG. 14).

The cable 86 is slidably inserted into the tubular sheath 86B with one end and the other end exposed to the outside. The other end of the cable 86 is wound around a reel (not shown) in the actuator AC. Then, each of the cables 86 passes after the pressure receiving portion 11 and is inserted into the through hole 11A of the pressure receiving portion 11 and pulled out to the front side of the pressure receiving portion 11, and one end portion is passed through the through hole 12A of the support portion 12. It is pulled out to the rear side of the support portion 12. A substantially cylindrical engaging portion 86A is attached to one end of the cable 86, and when the engaging portion 86A is engaged with the support portion 12, one end of the cable 86 is engaged with the support portion 12. It is fixed. Further, the end portion 86E of the sheath 86B is fixed to the pressure receiving portion 11 in a state of being engaged with the through hole 11A of the pressure receiving portion 11.

When the actuator AC is driven and the cable 86 is pulled, the support portion 12 to which one end of the cable 86 is fixed swings inward in the left-right direction as shown by a chain line in FIG. As a result, the cushion material 70 and the skin material 75 are pressed against the support portion 12 and swell toward the occupant side, so that the support position of the occupant can be changed. On the other hand, when the actuator AC is driven from the state shown by the chain line in FIG. 15 and the cable 86 is loosened from the pulled state, the solid line is shown in FIG. 15 due to the load from the occupant and the restoring force of the support portion 12 itself. , The support portion 12 swings outward in the left-right direction. As a result, the cushion material 70 and the skin material 75 can be retracted from the inflated state, and the support position of the occupant can be changed.

In this embodiment, since the support portion 12 having the same function as the left and right side support devices 3L and 3R described above is provided integrally with the pressure receiving member 10, the number of parts of the vehicle seat can be reduced. it can. Further, by replacing the pressure receiving member 10 (see FIG. 2) of the embodiment with the pressure receiving member 10 of the present embodiment, the support position of the occupant can be changed even in the vehicle seat not provided with the side support devices 3L and 3R. Can be.

Next, a fifth modification will be described. As shown in FIGS. 16A and 16B, in the present embodiment, the vehicle seat includes left and right side support devices 100 configured substantially symmetrically (only one of them is shown). The side support device 100 mainly includes a fixing member 110 fixed to the front side of the side frame 20 and a support member 120 that supports the occupant via a cushion material 70 or the like, and the cable 86 is driven by a driving force from an actuator (not shown). It is configured to be driven by being pulled or loosened from the pulled state.

The fixing member 110 is a member formed in a substantially plate shape, and mainly has a shaft support portion 111 provided at the front end portion and a guide surface 112 for guiding the movement of the rear end portion of the support member 120. .. Further, the support member 120 is a member whose front side portion is branched into two left and right sides, and is located on a plate-shaped support portion 121 for supporting an occupant and on the lateral side in the left-right direction of the support portion 121, and the front end portion thereof is a fixing member 110. It mainly has a pressing portion 122 rotatably supported by the shaft support portion 111 of the above, and a cable holding portion 123 for holding the cable 86.

The cable 86 is slidably inserted into the tubular sheath 86B with one end and the other end exposed to the outside, and the other ends are shown in the same manner as in the case of the fourth modification described above. Not connected to an actuator. Further, as shown in FIG. 17A (the cable is not shown), a substantially cylindrical held portion 86C is provided at the end of the sheath 86B.

The cable holding portion 123 has a holding recess 123A to which the held portion 86C can engage. The holding recess 123A is composed of a pair of upper and lower first walls 123B extending rearward from the rear end of the support portion 121, and a second wall 123C formed so as to connect the pair of upper and lower first walls 123B. Has been done. The second wall 123C has a concave surface extending in the vertical direction forming a substantially arc shape in cross section, and the pair of upper and lower first walls 123B allow sliding between the second wall 123C and the held portion 86C. It is configured to hold the held portion 86C from above and below in the state of being held. As a result, as shown in FIG. 17B, the held portion 86C, which is the end portion of the sheath 86B, can rotate left and right with respect to the support member 120 about the axis along the vertical direction shown in the drawing.

As shown in FIG. 16A, one end of the cable 86 extending from the held portion 86C is fixed to the fixing member 110 near the rear of the shaft support portion 111.

When the actuator is driven and the cable 86 is pulled, the rear end portion of the support portion 121 approaches the front end portion of the pressing portion 122 while moving forward along the guide surface 112. Then, as shown in FIG. 16B, the vicinity of the central portion in the front-rear direction of the pressing portion 122 is elastically bent so as to project inward in the left-right direction, so that the front end portion of the support portion 121 is inside in the left-right direction. Move to. As a result, the cushion material 70 and the skin material 75 are pressed against the support portion 12 and swell toward the occupant side, so that the support position of the occupant can be changed. On the other hand, when the actuator is driven from the state shown in FIG. 16B and the cable 86 is loosened from the pulled state, the front end portion of the support portion 121 is moved in the left-right direction due to the load from the occupant and the restoring force of the cushion material 70 or the like. Move outward. As a result, the cushion material 70 and the skin material 75 can be retracted from the inflated state, and the support position of the occupant can be changed.

In this embodiment, since the end portion (held portion 86C) of the sheath 86B can rotate left and right with respect to the support member 120, when the side support device 100 (support member 120) is driven, the sheath 86B and the sheath 86B It is possible to prevent an unnecessary load from being applied to the cable 86.

20 Side frame 40 Pressing member 41 Lower end 42 Upper end 43 Intermediate part 50 Support member S Vehicle seat S1 Seat cushion S2 Seat back

Claims (1)

A seat frame with a pair of side frames arranged apart from each other on the left and right,
A pressure receiving member, which is arranged between the pair of side frames and supports a load from an occupant, is provided.
The pressure receiving member includes a pressure receiving portion and support portions provided on the left and right sides of the pressure receiving portion and extending obliquely with respect to the pressure receiving portion so as to be located on the occupant side toward the left and right outer sides.
The support portion has a first through hole and has a first through hole.
The pressure receiving portion has a second through hole provided side by side with the first through hole when viewed from the occupant side.
The support portion has a protruding portion that protrudes in a direction away from the occupant.
The support portion can swing left and right with the vicinity of the boundary portion between the pressure receiving portion and the support portion as a fulcrum.
Further provided is a cable that is inserted into the first through hole and the second through hole and is fixed to the support portion by engaging one end portion with the protruding portion.
The support portion is a vehicle seat characterized in that the cable swings when the cable is pulled or loosened from the pulled state.

Images