JP6554878B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat including a reclining device that rotatably connects a seat back to a seat cushion.

  Conventionally, in a vehicle seat equipped with a reclining device, the shape and arrangement of a connecting bracket that connects a rear end portion of a seat cushion and a lower end portion of a seat back with the aim of securing frame rigidity around the device. What was devised is known (for example, refer to Patent Document 1).

In the vehicle seat with the reclining device described in Patent Document 1, a plate-like base bracket is provided in which one end is attached to the outer side surface of the seat back in the seat width direction and the other end is attached to the outer side surface of the seat cushion. It has been.
More specifically, one end of the base bracket is attached to the outer surface of the recliner provided on the outer surface of the seat back, and the other end is bolted to the outer surface of the seat cushion. A flange projecting outward in the seat width direction is formed on the entire outer periphery of the base bracket.
The base bracket protects the recliner, which is the main body of the reclining device, from the outside, and temporarily secures the frame rigidity around the device.

JP 2012-240427 A

By the way, in the vehicle seat, when a seated person is seated, a relatively large seating load is applied to the connecting portion that connects the seat cushion and the seat back, so that the frame rigidity of the connecting portion is improved. Is required.
In particular, in a vehicle seat with a reclining device as in Patent Document 1, a large load is applied to the peripheral portion (connecting portion) of the reclining device as the seat back rotates, and thus a device for further improving the frame rigidity is required. It was done.

In addition, for vehicle seats with a reclining device, the design and development of components so that the components of the reclining device do not protrude too far from the seat back or seat cushion in the seat width direction in order to make the seat compact in the seat width direction. Was demanded.
Therefore, there has been a demand for a technique that can suppress the sheet compactness, specifically, the apparatus from protruding outward in the seat width direction, while ensuring the frame rigidity around the reclining device.

  Further, in a vehicle seat with a reclining device, the device is composed of a plurality of components, and the assembly work is relatively complicated. Therefore, a device for improving the efficiency of the assembly work and reducing the cost has been required. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat capable of improving the frame rigidity of a connecting portion that connects a seat cushion and a seat back. It is in.
In particular, an object of the present invention is to provide a vehicle seat that can improve the frame rigidity around the reclining device.
Another object of the present invention is to provide a vehicle seat in which the seat is made compact, particularly in the seat with a recliner device, which is compact around the device.
Another object of the present invention is to provide a vehicle seat that improves the efficiency of the assembling work, in particular, the assembling work of the device in a seat with a reclining device.

According to the vehicle seat of the present invention, the object is to provide a cushion frame that is a skeleton of a seating portion, a back frame that is a skeleton of a backrest portion, a seat rear portion of the cushion frame, and a lower portion of the back frame. A coupling bracket for coupling, wherein the back frame has a back side frame constituting a side in the seat width direction, and the cushion frame has a cushion side frame constituting a side in the seat width direction. , the connecting bracket is made of stepped shape, one end is attached to the outer surface of the sheet width direction of the back side frame, the other end is attached to the side surface of the seat width direction of the cushion side frame, Reclinin for rotatably connecting the back frame to the cushion frame And the reclining device includes a rotation shaft that is a rotation center of the back frame, a biasing spring that biases the back frame along the rotation direction around the rotation shaft, and an outer surface of the back frame. A spring locking bracket for locking one end side of the biasing spring, a reclining unit attached to the outer side surface of the back side frame and restricting the rotation of the back frame, And the spring locking bracket and the reclining unit are sandwiched between the back side frame and the connecting bracket in the seat width direction .
As described above, since the connecting bracket has a step shape, the bending rigidity and torsional rigidity of the bent portion can be improved as compared with the conventional plate-shaped one.
In addition, for example, when one end side is attached to the outer side surface of the back side frame and the other end side is attached to the inner side surface of the cushion side frame, the step-shaped connecting bracket is outside in the seat width direction of the cushion side frame. A compact arrangement without overhanging.
That is, it is possible to realize a vehicle seat that achieves a compact seat while improving the frame rigidity of the connecting portion that connects the seat cushion and the seat back.
Also, with the above configuration, the connecting bracket can be assembled so as to cover the reclining unit as a main component of the reclining device from the outside, so that the frame rigidity around the reclining device can be improved and the device periphery can be made compact. .

Further, according to the vehicle seat of the present invention, the subject is a cushion frame that is a skeleton of a seating portion, a back frame that is a skeleton of a backrest portion, a seat rear portion of the cushion frame, and a lower portion of the back frame. And the back frame has a back side frame constituting a side in the seat width direction, and the cushion frame has a cushion side frame constituting a side in the seat width direction. The connecting bracket has a stepped shape, one end side is attached to the outer side surface in the seat width direction of the back side frame, and the other end side is attached to the side surface in the seat width direction of the cushion side frame, A reclining for rotatably connecting the back frame to the cushion frame. A reclining device, and a height link device that connects the cushion frame to the vehicle body floor so as to be movable up and down, and the reclining device includes a rotation axis that serves as a rotation center of the back frame, An urging spring that urges the back frame along the rotation direction; a spring locking bracket that is attached to an outer surface of the back frame and engages one end of the urging spring; and the back side A reclining unit attached to the outer surface of the frame and restricting the rotation of the back frame, and the spring locking bracket and the reclining unit are arranged between the back side frame and the connecting bracket in the seat width direction. The height link device is sandwiched between the cushion side frames. A brake rotating shaft that is pivotally supported on the side surface in the width direction and protrudes outward, a brake unit that is pivotably attached via the brake rotating shaft and restricts the lifting and lowering operation of the cushion frame, and the brake rotating shaft And a height operating lever that is pivotably attached via the brake unit and moves the cushion frame up and down.

At this time, the connection bracket includes a first side wall portion attached to an outer side surface of the back side frame, a second side wall portion attached to a side surface of the cushion side frame, the first side wall portion, and the second side wall portion. It is preferable that a reinforcing bead extending in a direction intersecting with the extending direction of the connecting wall portion is formed on the connecting wall portion .

At this time, the connection bracket is attached to the outer side surface of the back side frame and the inner side surface of the cushion side frame, and is arranged on the inner side in the seat width direction than the outer side wall portion. It is good to have a wall part and the connection wall part which connects the said outer side wall part and the said inner wall part .
With the above configuration, the connection bracket has one end attached to the outer side surface of the back side frame, continuously extending from one end to the inside of the cushion side frame, and the other end attached to the inner side surface of the cushion side frame. Therefore, the assembly rigidity of the connection bracket is improved, and interference with other components on the outer side surface of the cushion side frame can be suppressed.

At this time, the reclining unit is disposed between the outer wall portion and the inner wall portion in the seat width direction, and the connecting wall portion is provided at a position facing the reclining unit in the seat front-rear direction, and It is good to be bent along the outer peripheral part of the reclining unit .
With the structure of the connecting bracket, the protection of the reclining unit can be secured, and the rigidity of the frame around the reclining unit requiring relatively high rigidity can be improved.

At this time, the cushion frame includes a rear connection frame that connects rear portions of the left and right cushion side frames, and the inner wall portion is attached to the cushion side frame by an attachment member, and the attachment members include a plurality of attachment members. A first mounting member and a second mounting member disposed at a position sandwiching the rear connection frame therebetween in a predetermined direction, and a portion adjacent to the rear connection frame in an outer peripheral portion of the inner wall portion Preferably, a cutout portion is formed by cutting out toward a side different from the rear connection frame side.
With the above configuration, when the connection bracket is attached to the side surface of the cushion side frame with the attachment member, the two attachment members are arranged so as to sandwich the portion of the cushion side frame where the rigidity has been relatively increased. The mounting rigidity of the bracket is further improved.
With the above configuration, when the connection bracket is attached to the inner side surface of the cushion side frame, the shape and the arrangement are suppressed in which interference with the component parts (rear connection frame) of the cushion frame is suppressed.
In particular, when the seat is a seat with a height link device, the inner side surface of the cushion side frame has a complicated structure, and thus the effect of the present invention stands out.

At this time, the attachment member is a fastening member, and the inner wall portion and the cushion side frame are formed with through holes for fastening the fastening member, respectively, and the through wall of the inner wall portion is the through hole. It is preferable that the peripheral portion of the hole protrudes toward one side in the sheet width direction.
With the above configuration, the assembling rigidity of the coupling bracket with the cushion side frame is further improved.
In general, the connecting bracket is fixed to the cushion side frame by using a fastening bolt and a fastening nut. With this configuration, the fastening nut can be omitted.
Specifically, the protruding portion of the connecting bracket that is the peripheral portion of the through hole can be used in place of the fastening nut, and the protruding portion and the fastening bolt can be welded together.
If it does so, the vehicle seat which achieved the efficiency improvement of the assembly | attachment operation | work of a connection bracket (it is unnecessary for a welding nut, a number of parts reduction, shortening of an operation process) is realizable.

At this time, at least one of an upper end flange and a lower end flange protruding inward in the seat width direction is formed at the end portion in the vertical direction of the cushion side frame, and the peripheral portion of the through hole has a seat width. It protrudes toward the inner side in the direction, and it is preferable that at least a part of the flange is covered.
With the above configuration, not only the rigidity of the cushion side frame is improved, but also the portion of the connecting bracket attached to the cushion side frame is covered with the flange and protected from the outside.

According to the present invention, the connecting bracket has improved bending rigidity and torsional rigidity as compared with the conventional plate-shaped connecting bracket.
Further, when the step-shaped connecting bracket is, for example, one end side attached to the outer side surface of the back side frame and the other end side attached to the inner side surface of the cushion side frame, the outer side in the seat width direction of the cushion side frame A compact arrangement without overhanging.
Moreover , according to this invention, the assembly | attachment rigidity of a connection bracket improves and it can suppress interference with another component on the outer surface of a cushion side frame.
Further, according to the present invention, it is possible to improve the frame rigidity around the reclining device and achieve compactness around the device.
In addition, according to the present invention, it is possible to ensure the protection of the reclining unit and improve the frame rigidity around the reclining unit, which requires relatively high rigidity.
Further, according to the present invention, the mounting rigidity of the connecting bracket is further improved.
Moreover, according to this invention, it becomes a shape and arrangement | positioning which the connection bracket suppressed interference with the component (back connection frame) of a cushion frame.
In particular, when the seat is a seat with a height link device, the inner side surface of the cushion side frame has a complicated structure, and thus the effect of the present invention stands out.
Further, according to the present invention, the assembling rigidity of the coupling bracket with the cushion side frame is further improved. In addition, it is possible to realize a vehicle seat that achieves efficiency in assembling the connecting bracket (no need for a welding nut, reduction in the number of parts, and shortening of work processes).
Further, according to the present invention, not only the frame rigidity of the cushion side frame is improved, but also the portion of the connecting bracket attached to the cushion side frame is protected from the outside.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of the seat frame used as the frame of a vehicle seat. It is a principal part enlarged view of FIG. 2, Comprising: It is a perspective view which shows a reclining apparatus periphery. It is a disassembled perspective view of a reclining device and a connection bracket. It is a perspective view when the reclining apparatus periphery is seen from another angle. It is VI-VI sectional drawing of FIG. 5, Comprising: It is a figure explaining the assembly | attachment state of a cushion side frame and a connection bracket.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS.
The present embodiment is a vehicle seat including a reclining device, and includes a connection bracket that connects a back side frame and a cushion side frame, and the connection bracket has one end side on the outer surface of the back side frame in the seat front-rear direction. The present invention relates to an invention of a vehicle seat that is attached to an outer side surface of a reclining unit, and the other end side is attached around an inner side surface of a cushion side frame.
Note that the side on which the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

  As shown in FIG. 1, the vehicle seat S of the present embodiment is connected to a seat body including a seat cushion 1 and a seat back 2, and as shown in FIG. The height link device 30, the reclining device 40 that pivotally connects the seat back 2 to the seat cushion 1, and the connection bracket 50 that couples the seat cushion 1 and the seat back 2. .

As shown in FIG. 1, the seat cushion 1 is a seating portion that supports an occupant from below, and a cushion pad 1 a is placed on a cushion frame 10 shown in FIG. 2 that is a skeleton and is covered with a skin material 1 b. It is configured.
The seat back 2 is a backrest portion that supports the back of the occupant from behind, and is configured by placing a cushion pad 2a on the back frame 20 shown in FIG. 2 serving as a skeleton and covering with a skin material 2b.
The cushion frame 10 and the back frame 20 are connected by a connection bracket 50.

  As shown in FIG. 2, the cushion frame 10 is formed of a substantially rectangular frame that is a skeleton of the seat cushion 1, and a cushion side frame 11 disposed on the left and right sides, and a front portion of each cushion side frame 11. The plate-like pan frame 12 that connects the rear portions, the pipe-like rear connection frame 13 that connects the rear portions of the cushion side frames 11, and the pan frame 12 and the rear connection frame 13 are hooked and extended in a snake shape. It is mainly composed of three elastic springs 14.

The cushion side frame 11 is a sheet metal member that extends in the front-rear direction of the seat and has a substantially U-shaped vertical cross section. A reclining device 40 is attached to a rear portion of the cushion side frame 11 via a connection bracket 50, and a lower portion thereof. A known rail device is attached via the height link device 30.
An upper end flange 11a and a lower end flange 11b are formed at the upper end and the lower end of the cushion side frame 11 to bend and protrude inward in the seat width direction.
As shown in FIG. 2, the upper end flange 11 a and the lower end flange 11 b extend from the position where the reclining device 40 is attached to the cushion side frame 11 to the position where the pan frame 12 is attached in the front-rear direction of the seat.

As shown in FIG. 2, the back frame 20 is composed of a substantially rectangular frame that is a skeleton of the seat back 2, and has a substantially inverted U-shaped upper frame 21 that extends along the seat width direction, and the upper frame 21. A back side frame 22 having a substantially U-shaped cross section that extends downward from both ends in the seat width direction and extends in the vertical direction, and a substantially plate-shaped lower frame 23 that connects lower end portions of the left and right back side frames 22. And two elastic springs 24 that are hooked on the left and right backside frames 22 and extend in a snake shape.
The back side frame 22 is a sheet metal member that extends in the vertical direction and has a substantially U-shaped cross section, and its lower end portion is connected to the rear end portion of the cushion side frame 11 via the reclining device 40 and the connection bracket 50. Has been. In such a state, the back frame 20 can rotate relative to the cushion frame 10.

As shown in FIG. 2, the height link device 30 is attached between the cushion frame 10 and a known rail device, and the left and right first links 31 disposed on the front side of the seat and the left and right links disposed on the rear side of the seat. The second link 32 is a device that can adjust the height of the seat body by using the second link 32 as a drive link.
As shown in FIG. 5, a sector gear portion 32 a is formed as a gear on a part of the outer peripheral portion of the second link 32 on the cushion side frame 11 side, and a brake unit 34 described later. Is meshed with a pinion gear (not shown) provided inside.

Further, as shown in FIG. 2, the height link device 30 is pivotally supported on the side surface in the seat width direction of the cushion side frame 11 and protrudes outwardly, and can be rotated via the brake rotation shaft 33. A brake unit 34 that regulates the lifting and lowering operation of the seat body, and a height operation lever 35 that is rotatably attached via the brake rotating shaft 33 and the brake unit 34 and moves the seat body up and down. Yes.
When the height operation lever 35 is operated, the pinion gear rotates integrally with the brake rotation shaft 33, and the meshing position between the pinion gear and the sector gear portion 32a changes. Furthermore, the second link 32 on the left side where the sector gear portion 32a is formed rotates, and the second link 32 on the right side and the first link 31 on the right and left also rotate following the left second link 32. As a result, the seat body moves up and down and the seat height is adjusted.

As shown in FIGS. 2 to 4, the reclining device 40 includes a device that rotatably connects the back frame 20 to the cushion frame 10.
The reclining device 40 includes a reclining unit 41 that regulates the rotation of the back frame 20, and a rotation that is pivotally supported by the lower end portion of the back frame 20 in the seat width direction, protrudes from the outer surface of the back frame 20, and is connected to the reclining unit 41. It is mainly composed of a shaft 42 and a spiral spring 43 that is attached to the outside of the reclining unit 41 in the seat width direction and urges the back frame 20 to rotate toward the cushion frame 10 around the rotation shaft 42. Yes.

The reclining unit 41 can switch the state of the back frame 20 between a locked state that is fixed to the cushion frame 10 and an unlocked state that allows relative rotation.
In the reclining unit 41, the state of the back frame 20 is normally locked, and when the operation lever 46 shown in FIG. 2 is operated, the rotation shaft 42 is rotated by the operation, and the unlocking state is established. It becomes the composition which switches to.
While the state of the back frame 20 is in the unlocked state, the occupant can tilt the seat back 2 backward, and when the operation lever 46 is released when the rearward tilt angle reaches a desired angle, the occupant enters the locked state. It is configured to return.

The rotating shaft 42 is disposed between the left and right cushion side frames 11 with the axial direction extending along the seat width direction, and the extending end of the rotating shaft 42 is a shaft formed on the side surface of the back side frame 22. It protrudes to the outside in the sheet width direction through the hole 22a.
The protruding end portion of the rotating shaft 42 is assembled with the reclining unit 41 via a spring locking bracket 44 described later, and further assembled with the operation lever 46 shown in FIG. 2 at a position outside the reclining unit 41. It has been.

The spiral spring 43 biases the back frame 20 so as to rotate the cushion frame around the rotation shaft 42 when the back frame 20 is in the unlocked state and the back frame 20 is tilted backward. To do.
As shown in FIG. 4, the spiral spring 43 has one end 43a hooked to the protruding portion of the spring locking bracket 44 on the backside frame 22 side and the other end 43b on the cushion frame 10 side. It is hooked on the protruding portion of the locking bracket 45.

As shown in FIGS. 3 to 5, the connecting bracket 50 is formed of a stepped metal plate that connects the back frame 20 and the cushion frame 10, and a rear portion thereof is attached to the outer surface of the back side frame 22, The portion is attached so as to wrap around the inner side surface of the cushion side frame 11.
Specifically, as shown in FIG. 4, the connecting bracket 50 includes an outer wall portion 51 that fits on the outer surface of the reclining unit 41 attached to the backside frame 22, and a seat width direction from the outer wall portion 51. The inner wall portion 52 that is disposed on the inner side of the cushion side frame 11 and is bolted to the inner side surface of the cushion side frame 11, and the connecting wall portion 53 that connects the outer wall portion 51 and the inner wall portion 52.
The connection bracket 50 is formed to be thicker than the back side frame 22 and the cushion side frame 11.

As shown in FIG. 4, a shaft hole 51 a for inserting the rotating shaft 42 and a periphery for surrounding the shaft hole 51 a are provided on the side surface of the outer wall portion 51, and the reclining unit 41 is fitted. The fitting hole 51b is formed.
In addition, contact portions 51 c and 51 d that can contact the protruding portion of the spring locking bracket 44 are formed at the upper end portion of the outer peripheral portion of the outer wall portion 51. The contact portions 51 c and 51 d are stopper portions of the spring locking bracket 44 that can rotate integrally with the back frame 20.
A spring locking bracket 45 is joined to the peripheral portion of the shaft hole 51a on the outer surface of the outer wall 51 by welding.

As shown in FIGS. 4 and 5, through holes 52 a and 52 b for fastening the fastening member 54 are formed on the side surface of the inner wall portion 52, and the through holes 52 a and 52 b are respectively cushion side frames. 11 is arranged so as to communicate with through holes 11c and 11d formed in the side surface of the rear end portion of the motor.
As shown in FIGS. 5 and 6, in the inner wall portion 52, the peripheral portions of the through holes 52 a and 52 b protrude so as to protrude toward the inner side in the sheet width direction, and the protruded peripheral portion is the fastening member 54. It is concluded.
In addition, about the peripheral part of through-hole 11c, 11d among the cushion side frames 11, it protrudes so that it may protrude toward the outer side of a sheet | seat width direction, and the protruding peripheral part is fastened with the fastening member 54 similarly. .

Of the outer peripheral portion of the inner wall portion 52, a notch portion 52c that is notched toward the opposite side of the rear connection frame 13 side is formed in a portion close to the rear connection frame 13.
The notch 52c is notched in a substantially triangular shape, and is disposed between the through hole 52a and the through hole 52b to which the two fastening members 54 are fastened.

As shown in FIGS. 4 and 5, the connecting wall portion 53 is a portion that connects the front end portion of the outer wall portion 51 and the dead end portion of the inner wall portion 52, and the back side frame 22 and the cushion side frame. 11 is arranged so as to penetrate between the two.
The connecting wall 53 is provided at a position facing the reclining unit 41 in the front-rear direction of the seat, and is bent along the outer peripheral portion of the reclining unit 41.
As shown in FIG. 4, a reinforcing bead 53 a is formed on the connecting wall portion 53 so as to extend from a portion connected to the outer wall portion 51 to a portion connected to the inner wall portion 52.

In the above configuration, as shown in FIGS. 3 to 5, the reclining unit 41 is disposed between the outer wall 51 and the inner wall 52 in the seat width direction in the connection bracket 50.
In addition, the reclining unit 41 is disposed at a position surrounded by the outer wall 51 and the connecting wall 53 and the back side frame 22 (spring locking bracket 44).
As described above, the connecting bracket 50 is assembled so as to protect the reclining unit 41 that is a main component of the reclining device 40 from the outside, whereby the frame rigidity around the reclining device 40 (the reclining unit 41) can be improved.

Further, in the above configuration, as shown in FIG. 5, the through holes 52 a and 52 b of the inner wall portion 52 have the rear connection frame in a direction orthogonal to the direction from the reclining unit 41 side to the rear connection frame 13 side in the connection bracket 50. It is arrange | positioned in the position on which 13 is pinched | interposed.
As described above, when the connecting bracket 50 is attached to the inner side surface of the cushion side frame 11 with the fastening member 54, the two fastening members 54 are arranged so as to sandwich a portion of the cushion side frame 11 having relatively increased rigidity. Therefore, the attachment rigidity of the connection bracket 50 is improved.

Further, in the above configuration, as shown in FIGS. 5 and 6, in the inner wall portion 52, the peripheral portions of the through holes 52 a and 52 b protrude toward the inner side in the sheet width direction, and the protruding peripheral portion is the fastening member 54. It is concluded with.
In general, the connection bracket 50 is fixed to the cushion side frame 11 using fastening bolts and fastening nuts. However, with this configuration, the fastening nuts can be made unnecessary.
Specifically, the protruding portion of the connecting bracket 50 that is the peripheral portion of the through holes 52a and 52b can be used in place of the fastening nut, and the protruding portion and the fastening member 54 are welded to each other. be able to.
Therefore, when the connecting bracket 50 is assembled, it is possible to eliminate the need for a welding nut, reduce the number of parts, shorten the work process, and improve the assembly rigidity.

Further, in the above configuration, as shown in FIGS. 5 and 6, the protruding portions of the connecting bracket 50 that are the peripheral portions of the through holes 52 a and 52 b are the upper end flange 11 a and the lower end flange 11 b of the cushion side frame 11. And is partially covered by these flanges.
Therefore, not only the frame rigidity of the cushion side frame 11 is improved, but the portion of the connection bracket 50 attached to the cushion side frame 11 is covered with the flange and protected from the outside.

In the above configuration, as shown in FIG. 5, the upper end flange 11a and the lower end flange 11b project inward in the seat width direction to cover the second link 32 (drive link) and the sector gear portion 32a from above and below, respectively. Projects to the position.
Therefore, these components of the height link device 30 are protected from the outside.

<Other embodiments>
In the said embodiment, as shown in FIG. 2, although the vehicle seat S becomes a structure provided with the height link apparatus 30 and the reclining apparatus 40, it can change without being specifically limited, These apparatuses. Is not necessarily provided.
In that case, for example, the connection bracket 50 may be configured such that one end side is directly attached to the outer side surface of the back side frame 22 and the other end side is directly attached to the inner side surface of the cushion side frame 11.

In the above embodiment, as shown in FIG. 3, the connection bracket 50 has a rear portion attached to the outer side surface of the back side frame 22 and a front portion attached around the inner side surface of the cushion side frame 11. However, there is no particular limitation, and the configuration may be reversed.
Specifically, the connection bracket 50 has a rear portion attached to the outer side surface of the back side frame 22 and a front portion attached around the inner side surface of the cushion side frame 11, but is particularly limited. It can be changed without any change.

  In the above-described embodiment, a vehicle seat used for an automobile is described as a specific example. can do.

In the present embodiment, the vehicle seat according to the present invention has been mainly described.
However, said embodiment is only an example for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

S Vehicle Seat 1 Seat Cushion 1a, 2a Cushion Pad 1b, 2b Skin Material 2 Seat Back 10 Cushion Frame 11 Cushion Side Frame 11a Upper End Flange 11b Lower End Flange 11c, 11d Through Hole 12 Pan Frame 13 Rear Link Frame 14 Elastic Spring 20 Back Frame 21 Upper frame 22 Back side frame 22a Shaft hole 23 Lower frame 24 Elastic spring 30 Height link device 31 First link 32 Second link (drive link)
32a Sector gear portion 33 Brake rotating shaft 34 Brake unit 35 Height operating lever 40 Reclining device 41 Reclining unit 42 Rotating shaft 43 Spiral spring (biasing spring)
43a One end part 43b Other end part 44, 45 Spring locking bracket 46 Operation lever 50 Connection bracket 51 Outer side wall part (first side wall part)
51a Shaft hole 51b Fitting hole 51c, 51d Contact part 52 Inner side wall part (2nd side wall part)
52a, 52b Through hole 52c Notch 53 Connection wall 53a Reinforcement bead 54 Fastening member (attachment member)

Claims (8)

A cushion frame that serves as a skeleton of the seating portion, a back frame that serves as a skeleton of the backrest portion, and a connection bracket that connects a seat rear portion of the cushion frame and a lower portion of the back frame,
The back frame has a back side frame constituting the side in the seat width direction,
The cushion frame has a cushion side frame that forms the side in the seat width direction,
The connection bracket is made of stepped shape, one end is attached to the outer surface of the sheet width direction of the back side frame, the other end is attached to the side surface of the seat width direction of the cushion side frame,
A reclining device for rotatably connecting the back frame to the cushion frame;
The reclining device
A rotation axis serving as a rotation center of the back frame;
An urging spring for urging the back frame along the rotation direction about the rotation axis;
A spring locking bracket attached to the outer surface of the back frame, for locking one end of the biasing spring;
A reclining unit that is attached to the outer surface of the back side frame and regulates the rotation of the back frame;
The vehicle seat, wherein the spring locking bracket and the reclining unit are sandwiched between the back side frame and the connecting bracket in the seat width direction . A cushion frame that serves as a skeleton of the seating portion, a back frame that serves as a skeleton of the backrest portion, and a connection bracket that connects a seat rear portion of the cushion frame and a lower portion of the back frame,
The back frame has a back side frame constituting the side in the seat width direction,
The cushion frame has a cushion side frame that forms the side in the seat width direction,
The connection bracket has a stepped shape, one end side is attached to the outer side surface in the seat width direction of the back side frame, and the other end side is attached to the side surface in the seat width direction of the cushion side frame,
A reclining device for rotatably connecting the back frame to the cushion frame;
A height link device that connects the cushion frame to the vehicle body floor so as to be movable up and down,
The reclining device is
A rotation axis serving as a rotation center of the back frame;
An urging spring for urging the back frame along the rotation direction about the rotation axis;
A spring locking bracket attached to the outer surface of the back frame, for locking one end of the biasing spring;
A reclining unit that is attached to the outer surface of the back side frame and regulates the rotation of the back frame;
The spring locking bracket and the reclining unit are sandwiched between the back side frame and the connecting bracket in the seat width direction,
The height link device
A brake rotating shaft that is pivotally supported on the side surface of the cushion side frame in the seat width direction and protrudes outward;
A brake unit that is pivotally attached via the brake rotation shaft and regulates the lifting and lowering movement of the cushion frame;
The brake rotation axis and pivotally mounted through the brake unit, the vehicle dual seat you, characterized in that it has a height control lever to the cushion frame is moved up and down, a. The connection bracket connects the first side wall portion attached to the outer side surface of the back side frame, the second side wall portion attached to the side surface of the cushion side frame, the first side wall portion and the second side wall portion. A connecting wall,
The vehicle seat according to claim 1 or 2 , wherein a reinforcing bead extending in a direction intersecting with an extending direction of the connecting wall portion is formed on the connecting wall portion . The connecting bracket includes an outer wall portion that is attached to an outer surface of the back side frame, an inner wall portion that is attached to an inner surface of the cushion side frame and is disposed on the inner side in the seat width direction than the outer wall portion. the outer wall portion and the vehicle seat according to claim 1 or 2, characterized in that a, a connecting wall portion connecting the inner wall portion. The reclining unit is disposed between the outer wall portion and the inner wall portion in the seat width direction,
5. The vehicle according to claim 4 , wherein the connection wall portion is provided at a position facing the reclining unit in a seat front-rear direction and is bent along an outer peripheral portion of the reclining unit . Sheet. The cushion frame has a rear connection frame that connects rear portions of the left and right cushion side frames,
The inner wall portion is attached to the cushion side frame by an attachment member,
The mounting member includes a plurality of first mounting members and second mounting members that are disposed at positions sandwiching the rear connection frame in a predetermined direction.
Of the outer peripheral portion of the inner wall portion, a portion close to the rear connection frame is formed with a notch that is notched toward a side different from the rear connection frame side. The vehicle seat according to claim 4 or 5 . The attachment member is a fastening member,
The inner wall portion and the cushion side frame are each formed with a through hole for fastening the fastening member,
The vehicle seat according to claim 6 , wherein a peripheral portion of the through hole protrudes toward one side in a seat width direction in the inner wall portion. At the end portion in the vertical direction of the cushion side frame, at least one of the upper end flange and the lower end flange projecting inward in the seat width direction is formed,
The vehicle seat according to claim 7, wherein a peripheral portion of the through hole protrudes inward in the seat width direction and is at least partially covered by the flange.

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