JP6271910B2 - Seat frame and vehicle seat - Google Patents

Description

  The present invention relates to a seat frame and a vehicle seat, and more particularly to a seat frame and a vehicle seat provided with a height link device that supports a cushion frame made of a resin material in a state in which the cushion frame can be raised and lowered.

Some vehicle seats are formed by molding a part or the whole of a seat frame serving as a skeleton with a resin material such as plastic for the purpose of reducing the weight for improving the fuel efficiency of the vehicle.
As an example of such a vehicle seat, a reclining device that rotatably connects a seat back to a seat cushion is provided, and a cushion frame that is a skeleton of the seat cushion and a back frame that is a skeleton of the seat back are resin materials. Is known (see Patent Documents 1 and 2).

The vehicle seat described in Patent Literature 1 includes a cushion frame that discloses that the vehicle seat may be formed of a reinforced resin for weight reduction.
Bolt holes are formed on the frame side constituting the seat side of the cushion frame, and the reclining device is assembled by bolting a hinge bracket of the reclining device to the bolt holes.

JP 2002-34706 A JP 2003-182417 A

By the way, when the seat frame that is the skeleton of the vehicle seat is formed of a resin material for the purpose of reducing the weight, it is necessary to ensure the rigidity of the seat frame, and the connection bracket that connects the cushion frame and the back frame. Some are equipped with.
In such a case, in order to further reduce the weight of the seat frame, a technique for improving the connection rigidity of the connection bracket or assembling other assembly parts using the connection bracket is widely desired.
For example, in Patent Document 1, a connecting bracket is secured by bolting a hinge bracket to a frame side of a cushion frame, and a reclining device is assembled using the hinge bracket.
However, there is room for further improving the connection rigidity of the hinge bracket, and there is room for improvement in assembling other assembly parts in addition to the reclining device using the connection bracket.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to improve the rigidity of a cushion frame and a back frame formed from a resin material, and to attach an assembly component to be assembled to these frames. An object is to provide a seat frame and a vehicle seat with improved rigidity.
Another object of the present invention is to provide a seat frame and a vehicle seat that can reduce the number of parts by assembling other assembling parts using a coupling bracket that couples a cushion frame and a back frame. It is to provide.

According to the seat frame of the present invention, the subject is a seat frame that is a skeleton of a vehicle seat, a cushion frame that is a skeleton of a seating portion in the vehicle seat, and a back frame that is a skeleton of a backrest portion. A connecting bracket that connects a seat rear end side of the cushion frame and a lower end side of the back frame, and a height link device that connects the cushion frame to a base member disposed below the cushion frame so as to be movable up and down. The cushion frame includes a side frame portion that constitutes a side in the seat width direction, and one end side of the connection bracket is attached to a side surface in the seat width direction of the side frame portion. engaging portion formed has a lockable claw portion, the height linkage , A brake unit for regulating the lifting of the cushion frame, the brake unit, that is attached via the connecting bracket in the seat width direction side surface of the side frame portion, it is solved by.

As described above, the cushion frame includes a connection bracket that connects the rear end side of the side frame portion and the lower end side of the back frame, and the connection bracket is locked to the locking portion formed in the side frame portion. Since the possible nail | claw part is provided, the connection rigidity of the connection bracket with respect to a cushion frame and a back frame can be improved. Further, since the connecting bracket includes the claw portion, positioning when attaching the connecting bracket to these frames is facilitated.
Further, the brake unit can be assembled to the side surface in the seat width direction of the side frame portion using the connection bracket, so that the mounting rigidity of the brake unit is improved and the positioning when the brake unit is mounted is facilitated. Moreover, the number of parts can be reduced by using a connection bracket.

At this time, the said side frame part is good to be formed from the resin material.
As described above, by forming the side frame portion from a resin material, it is possible to achieve weight reduction for improving the fuel efficiency of the vehicle. Moreover, the rigidity of the cushion frame which one part was formed from the resin material can be improved by providing the connection bracket .

At this time, the connecting bracket is attached to an outer side surface of the side frame portion in the seat width direction, and the locking portion is a locking hole penetrating a side surface of the side frame portion in the seat width direction, and the claw portion Are continuously extending from the connecting bracket in the seat width direction, inserted through the locking hole of the side frame portion, and continuously extending from the extending end side of the inserted portion. It is preferable to include a bent portion that bends in the extending direction and the intersecting direction and faces the inner side surface of the side frame portion in the seat width direction.
With the above configuration, since the claw portion of the connection bracket is hooked so as to pass through the locking hole from the outer side surface in the seat width direction of the side frame portion and wrap around the inner side surface, the connection rigidity of the connection bracket to the cushion frame is increased. The brake unit mounting rigidity is improved.
In particular, the brake unit may fall from the cushion frame in the left-right width direction or peel off due to static load received from the brake unit's own weight, dynamic load received from the rotation operation of the brake unit, or impact load received from the outside. It is possible to suppress the trapping.

At this time, the claw portion is preferably disposed above the brake unit.
With the above configuration, the mounting rigidity of the brake unit is further improved.
In particular, it is possible to further suppress the brake unit from falling or peeling off from the cushion frame as the brake unit rotates.

At this time, the brake unit may be disposed between the claw portion and a portion to which the back frame is attached in the front-rear direction of the connecting bracket.
With the above configuration, the brake unit is disposed in a portion of the coupling bracket where the rigidity has been relatively increased, so that the mounting rigidity of the brake unit is improved.

At this time, the connection bracket is formed at a position different from the region where the brake unit is attached, and includes a plurality of through holes penetrating in the seat width direction, and a peripheral portion of the through hole is bonded to the side frame portion. It is good to be joined with.
With the above configuration, when the connecting bracket is joined to the side frame portion with an adhesive, the adhesive can be uniformly applied by dropping the excess adhesive from the through hole, and can be firmly fixed.

At this time, the connection bracket may be joined by the side frame portion and the fastener at a position different from a region where the brake unit is attached.
Moreover, the said connection bracket is good to be provided in the position different from the area | region where the said brake unit was attached, and to provide the bead part which protrudes in a sheet | seat width direction.
With the above configuration, the connection rigidity of the connection bracket to the side frame portion is improved.

At this time, a vehicle seat including the above-described seat frame can also be realized.
With the above-described configuration, it is possible to provide a vehicle seat that improves the connection rigidity of a cushion frame and a back frame that are partially formed from a resin material, and also improves the attachment rigidity of an assembly part that is assembled to these frames.
In addition, the number of parts can be reduced by assembling other assembling parts using a connecting bracket that connects the cushion frame and the back frame.

According to the first aspect of the present invention, there is provided the connecting bracket that connects the rear end side of the side frame portion and the lower end side of the back frame in the cushion frame, and the connecting bracket is formed on the side frame portion. Since the nail | claw part which can be latched to a part is provided, the connection rigidity of the connection bracket with respect to a cushion frame and a back frame can be improved. Further, since the connecting bracket includes the claw portion, positioning when attaching the connecting bracket to these frames is facilitated.
Further, the brake unit can be assembled to the side surface in the seat width direction of the side frame portion using the connection bracket, so that the mounting rigidity of the brake unit is improved and the positioning when the brake unit is mounted is facilitated. Moreover, the number of parts can be reduced by using a connection bracket.

According to the second aspect of the present invention, the side frame portion is formed of the resin material, so that weight reduction for improving the fuel efficiency of the vehicle can be achieved. Moreover, the rigidity of the cushion frame which one part was formed from the resin material can be improved by providing the connection bracket .
According to the invention 請 Motomeko 3, since the claw portion of the connecting bracket is hooked in such a way as to wrap around the inner surface by inserting the retaining hole from the seat width direction outer side of the side frame portions, with respect to the cushion frame The connection rigidity of the connection bracket is improved, and the mounting rigidity of the brake unit is improved.
In particular, the brake unit may fall from the cushion frame in the left-right width direction or peel off due to static load received from the brake unit's own weight, dynamic load received from the rotation operation of the brake unit, or impact load received from the outside. It can be suppressed.

According to the invention of claim 4, the mounting rigidity of the brake unit is further improved.
In particular, it is possible to further suppress the brake unit from falling or peeling off from the cushion frame as the brake unit rotates.
According to the fifth aspect of the present invention, the brake unit is disposed in a portion of the connecting bracket where the rigidity is relatively increased, so that the mounting rigidity of the brake unit is improved.
According to invention of Claim 6, when joining a connection bracket to a side frame part with an adhesive agent, an adhesive agent can be apply | coated uniformly by dropping an excess adhesive agent from a through-hole, and it fixes firmly. be able to.

According to the seventh and eighth aspects of the invention, the connection rigidity of the connection bracket to the side frame portion is improved.
According to the ninth aspect of the present invention, there is provided a vehicle seat in which the coupling rigidity of a cushion frame and a back frame partially formed of a resin material is improved, and the mounting rigidity of the assembly parts assembled to these frames is improved. it can.
Moreover, the number of parts can be reduced by assembling other assembling parts by using a connecting bracket for connecting the cushion frame and the back frame.

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 vehicular seat. It is a disassembled perspective view of the connection bracket periphery attached to a cushion frame and a back frame. It is a perspective view of a seat frame, and is an enlarged view around a connection bracket. Fig.5 (a) is a perspective view of a connection bracket, FIG.5 (b) is a perspective view of the connection bracket seen from another angle. It is a perspective view which shows 2nd Example of the connection bracket of FIG.

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 provided with a height link device that supports a resin cushion frame so as to be movable up and down, and includes a connection bracket that connects the cushion frame and a back frame, and the brake constituting the height link device The vehicle is characterized in that the unit is attached to the outer side surface of the side frame portion of the cushion frame by using a connecting bracket, and further, the claw portion of the connecting bracket is hooked in a locking hole formed in the side frame portion. The present invention relates to an invention for a sheet.
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, a vehicle seat S according to the present embodiment is attached to a vehicle body floor as shown in FIG. 2 and a seat body including a seat back 1, a seat cushion 2, and a headrest 3. It is mainly comprised from the left and right rail apparatus 4 which supports a main body in the state which can move to the front-back direction.
In addition, as shown in FIG. 2, the vehicle seat S has a reclining device 30 that pivotally connects the seat back 1 to the seat cushion 2, and the seat cushion 2 can be raised and lowered relative to the rail device 4. A height link device 50 to be connected is attached.

As shown in FIG. 1, the seat back 1 is configured by placing a cushion pad 1a on a back frame 10 shown in FIG. 2 serving as a skeleton and covering it with a skin material 1b.
The seat cushion 2 is configured by placing a cushion pad 2a on a cushion frame 20 shown in FIG. 2 serving as a skeleton and covering the cushion pad 2a with a skin material 2b.
The headrest 3 has a configuration in which a cushion pad 3a is placed on a core material (not shown) and is covered with a skin material 3b, and is supported by a headrest pillar HP attached to the back frame 10.

The rail device 4 corresponds to a base member. As shown in FIG. 2, the left and right lower rails 4a are fixed to the vehicle body floor and extend in the front-rear direction of the seat, and the left and right upper rails are slidably supported along the lower rail 4a. 4b.
A cushion frame 20 is installed on the upper surfaces of the left and right upper rails 4b via a height link device 50.
The rail device 4 is provided with a lock member (not shown) for locking the upper rail 4b so as not to slide and an operation lever (not shown) for releasing the lock state of the lock member.

The back frame 10 is formed of a substantially rectangular frame that serves as a skeleton of the seat back 2, and is formed of carbon fiber reinforced plastic (CFRP) as a resin material.
The back frame 10 is formed by individually molding a front back frame 10a as a front portion and a rear back frame 10b disposed behind the front back frame 10a, and then connecting both frames in the front-rear direction with an adhesive. Is formed.
As shown in FIG. 2, a connecting bracket 40 that connects the back frame 10 and the cushion frame 20 is attached to the left and right outer surfaces of the back frame 10. Details will be described later.

As shown in FIG. 2, the cushion frame 20 is formed of a substantially rectangular frame serving as a skeleton of the seat cushion 1 and is molded from CFRP as a resin material.
The cushion frame 20 may be formed of a resin material other than CFRP, or a molding method other than mold molding, for example, by laminating sheets made of a resin material in accordance with the frame shape. The cushion frame 20 may be formed.
Moreover, although the cushion frame 20 whole is resin-molded by CFRP, it is not limited to this, For example, it connects with the back frame 10 among the cushion frames 20, and the reclining apparatus 30 and the height link apparatus 50 are attached. It is only necessary that the side frame portion is formed of at least a resin material.

The cushion frame 20 connects a side frame portion 21 arranged on the left and right sides, a pan frame portion 25 as a plate-like frame connecting the front portions of the side frame portions 21, and a rear portion of the side frame portions 21. The side frame part 21, the pan frame part 25, and the frame connection part 26 are integrally molded with resin.
An elastic member 27 is supported between the left and right side frame portions 21 and between the pan frame portion 25 and the frame connecting portion 26 to support the occupant's buttocks. Further, a connection pipe 28 that is inserted into the frame connection portion 26 and connects the rear portions of the left and right side frame portions 21 is disposed.

The side frame portion 21 is formed of a resin molded product having a substantially inverted U-shaped cross section that is long in the front-rear direction. The side frame portion 21 is opposed to the frame outer wall portion 22 that is the outer wall of the side frame portion 21, The frame inner wall portion 23 that is the inner wall of the frame 21 and the frame upper wall portion 24 that connects the frame outer wall portion 22 and the upper end portion of the frame inner wall portion 23 to each other.
The pan frame portion 25 is continuously connected to the frame inner wall portion 23 and the frame upper wall portion 24 of the left and right side frame portions 21, and the frame connecting portion 26 is continuously connected to the left and right frame inner wall portions 23. It is connected.
The elastic member 27 extends in the left-right direction, and is latched by a latching portion 23 a formed on the inner wall portion 23 of the left and right side frame portions 21.

As shown in FIG. 3, the frame outer wall portion 22 of the side frame portion 21 has a brake fitting hole 22a for attaching a brake unit 52, which is a component of the height link device 50, and a front portion of the brake fitting hole 22a. Therefore, it is arranged slightly above, and is a fastening hole 22b for locking the claw portion 42 of the connecting bracket 40, and a fastener fastening for fastening the fastener 45, which is arranged behind the brake fitting hole 22a. A hole 22c and a link fastening hole 22d for attaching the link 51 that is a component of the height link device 50 are formed.
The locking hole 22b is formed in accordance with the shape and attachment direction of the claw portion 42 of the connecting bracket 40, and is provided as a substantially rectangular slit slightly inclined forward from the horizontal direction when viewed from the side of the seat. Yes.

In the above configuration, the reclining device 30 is attached to the lower end portion of the back frame 10 on the left and right outer surfaces via the connecting member 11 as shown in FIG. Furthermore, the rear end side of the connection bracket 40 is attached to the left and right outer sides of the reclining device 30. A side frame portion 21 is attached to the front end side of the connection bracket 40.
That is, the back frame 10 and the cushion frame 20 are supported by being connected via the reclining device 30 and the connection bracket 40. In such a state, the back frame 10 can rotate relative to the cushion frame 20.

As shown in FIG. 3, the reclining device 30 is a known device that rotatably connects the back frame 10 to the cushion frame 20.
The reclining device 30 is a reclining device main body 31 that is driven when the back frame 10 is rotated, and is pivotally supported by the lower end portion of the back frame 10 in the left-right direction, and protrudes from the outer surface of the back frame 10. Mainly from a rotating shaft 32 to be connected and a spiral spring 33 attached to the left and right outer sides of the reclining device main body 31 and biasing the back frame 10 to rotate toward the cushion frame 20 around the rotating shaft 32. It is configured.

The reclining device main body 31 has a known structure, and the state of the back frame 10 can be switched between a locked state fixed to the cushion frame 20 and an unlocked state capable of relative rotation. .
In the reclining device main body 31, the state of the back frame 10 is normally locked, and when an operation lever (not shown) is operated, the rotation shaft 32 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 10 is in the unlocked state, the occupant can tilt the seat back 2 backward. When the rearward tilt angle reaches the desired angle, the occupant returns to the locked state. It is the composition to do.

The spiral spring 33 rotates the back frame 10 toward the cushion frame 20 around the rotation shaft 32 when the back frame 10 is unlocked and the seat back 2 is tilted backward. Energize to.
One end portion 33a of the spiral spring 33 is provided on the back frame 10 side and is latched to the spring locking portion 12 extending outward in the left-right direction, and the other end portion 33b is provided on the cushion frame 20 side. It is latched by a spring latching portion 47 extending outward in the left-right direction.

As shown in FIG. 3, the connecting bracket 40 is made of a substantially crank-shaped metal plate that connects the back frame 10 and the side frame portion 21, and its front portion is attached to the left and right outer surfaces of the side frame portion 21, and The portion is a lower end portion of the back frame 10 and is attached to the left and right outer surfaces via a reclining device 30.
Moreover, the connection bracket 40 consists of a member long in the front-back direction, and the brake unit 52 is attached to the left and right outer surfaces using the front portion.

As shown in FIG. 5, the connecting bracket 40 includes a main body wall portion 41 attached to the left and right outer surfaces of the side frame portion 21, a claw portion 42 formed on the upper end side of the main body wall portion 41 and in the front portion, The upper wall 43 is bent mainly from the upper end of the main body wall 41 to the left and right, and the lower wall 44 is bent from the lower end of the main body wall 41 to the left and right.
The upper wall portion 43 extends to the left and right inside so as to overlap the upper surface of the side frame portion 21 and the upper surface of the reclining device main body 31. Further, the lower wall portion 44 also extends so as to overlap the bottom surface of the side frame portion 21 and the bottom surface of the reclining device main body 31, thereby increasing the rigidity of the connection bracket 40 and the mounting rigidity of the brake unit 52.

The main body wall portion 41 is a plate member interposed between the outer surface of the side frame portion 21 and the brake unit 52.
As shown in FIG. 5, the main body wall portion 41 is disposed at the front portion thereof, and is disposed at the rear portion of the brake fitting groove 41 a for fitting the brake unit 52, so as to fit the reclining device main body 31. The lycra fitting hole 41b, the fastening hole 41c for fastening the fastener 45, the bead part 41d arranged so as to protrude in the left-right direction from the central part to the rear part, and the claw part And a recess 41e disposed in a portion close to 42.

The brake fitting groove 41a of the main body wall portion 41 has a substantially circular shape, and as shown in FIG. 3, at least a part of the outer peripheral portion thereof is bent inwardly in the left and right sides to form the brake fitting hole 22a of the side frame portion 21. The connecting bracket 40 is positioned with respect to the side frame portion 21. Further, the mounting rigidity of the connecting bracket 40 is ensured.
The lycra fitting hole 41b is formed in a substantially circular shape, and a part of the outer peripheral portion thereof is bent to the left and right to form a spring locking portion 47, and is fitted so as to cover the reclining device main body 31. The connection bracket 40 is positioned with respect to the frame 10 side.

The fastening holes 41c are substantially circular through-holes and communicate with each other in a state of being joined to the fastener fastening holes 22c of the side frame portion 21, and by fastening the fasteners 45 from the left and right outer sides, The part 21 and the connection bracket 40 are joined.
In addition, in the peripheral portion of the outer surface of the fastening hole 41c, a substantially circular concave portion that is slightly recessed on the left and right inner sides is formed, and the flange portion of the fastener 45 is disposed so as to overlap. It can suppress that it protrudes into.

The bead portion 41d has a predetermined width and is formed from a portion projecting to the left and right outsides, and is continuously formed from the upper portion and the lower portion to the rear portion of the fastening hole 41c so as to avoid the lycra fitting hole 41b. It is arranged to extend.
Thus, while the upper wall portion 43 and the lower wall portion 44 extend inward in the left and right directions, the bead portion 41d has a shape projecting outward in the left and right directions, so that the rigidity of the connection bracket 40 is increased and the lateral width direction is increased. It becomes a stable shape.
The concave portion 41e is formed of a substantially circular concave portion that is slightly recessed on the left and right inner sides, and is disposed close to the lower portion of the claw portion 42.
Therefore, the rigidity of the claw part 42 peripheral part can be improved.

As shown in FIG. 4, the claw portion 42 is a member that is hooked into a locking hole 22b formed in the frame outer wall portion 22 of the side frame portion 21, as shown in FIG. Thus, it arrange | positions a little upwards rather than the brake fitting groove | channel 41a which fits the brake unit 52. FIG.
The claw portion 42 is continuously bent from the front end portion of the connecting bracket 40 to the left and right sides, and is continuous from the insertion portion 42a inserted into the locking hole 22b of the frame outer wall portion 22 and the extending end portion of the insertion portion 42a. The bent portion 42b is bent in the direction intersecting with the extending direction of the insertion portion 42a and opposed to the left and right inner surfaces of the frame outer wall portion 22.

More specifically, the insertion portion 42a is arranged to be inclined slightly forward from the horizontal direction when viewed from the side of the seat, and extends from the front end portion of the connection bracket 40 to the left and right inner sides and is inclined slightly upward from the left and right direction. It extends to do.
In addition, the bent portion 42b is bent in a direction substantially orthogonal to the insertion portion 42a from the extending end portion of the insertion portion 42a, and is inclined slightly forward from the vertical direction along the left and right inner side surfaces of the frame outer wall portion 22. So that it extends.
As a result, the left and right outer surfaces of the bent portion 42b of the claw portion 42 and the left and right inner surfaces of the frame outer wall portion 22 of the side frame portion 21 are in contact with each other. Therefore, the connection bracket 40 is firmly attached to the side frame portion 21. In particular, it is possible to suppress the connection bracket 40 from falling in the left-right direction due to a load applied when the brake unit 52 is rotated. Further, the connecting bracket 40 is positioned with respect to the cushion frame 20 side.

The connecting bracket 40 is mechanically joined and bonded by fitting the brake fitting groove 41a to the side frame portion 21, fastening the fastener 45 to the fastening hole 41c, and latching the claw portion 42. The attachment rigidity is enhanced by adhesive bonding using an agent.
In the main body wall 41 of the connecting bracket 40, a plurality of through holes (not shown) penetrating in the left-right direction are formed between the brake fitting groove 41a and the clincher fitting hole 41b in the front-rear direction. .
In addition, a recess (not shown) in the peripheral portion of the fastening hole 41 c and the recess 41 e are provided between the side frame portion 21 and the connection bracket 40 to ensure the thickness of the adhesive.
Therefore, when joining the connection bracket 40 to the side frame portion 21 with an adhesive, excess adhesive can be dropped from the through hole and the adhesive can be applied uniformly.

As shown in FIG. 3, a connecting plate 46 that is long in the front-rear direction is attached between the connecting bracket 40 and the brake unit 52.
The connecting plate 46 is made of a metal plate, and is formed in the central portion thereof. The connecting plate 46 is formed on the outer side in the radial direction of the brake fitting hole 46a for fitting the brake unit 52 and the brake fitting hole 46a. And a plurality of hooking portions 46b that sandwich the portion.
The hook portion 46 b is formed in four directions so as to surround the brake fitting hole 46 a, and the brake unit 52 is positioned with respect to the connecting plate 46 by being hooked on the outer peripheral portion of the brake unit 52.

The connecting plate 46 is mechanically joined on the left and right outer surfaces by fitting the brake unit 52 into the brake fitting hole 46a and sandwiching the connecting plate 46 by the hooking portion 46b, and is adhesively joined using an adhesive. Yes. In addition, the left and right inner surfaces are adhesively bonded to the connection bracket 40 using an adhesive.
As described above, the brake unit 52 is attached to the side frame portion 21 via the connection bracket 40 and the connection plate 46, so that the attachment rigidity of the brake unit 52 is further increased.

As shown in FIG. 2, the height link device 50 is a known device that connects the cushion frame 20 to the rail device 4 so as to be movable up and down.
The height link device 50 is disposed between the rail device 4 and the cushion frame 20, and is a link 51 that can be rotated about a connecting portion on the rail device 4 side as a rotation shaft, and a rear portion of the side frame portion 21, and left and right. And a brake unit 52 that is disposed on the outer side surface and restricts raising and lowering of the cushion frame 20.
An operation lever 55 for operating the drive of the height link device 50 is attached to the outer periphery of the brake unit 52.

The link 51 includes a pair of front links (not shown) connected to the front side of the left and right side frame portions 21 and a pair of rear links (not shown) connected to the rear side.
The left and right front links are connected to each other by a connecting member (not shown) in the left-right direction, and the left and right rear links are connected to each other by a connecting pipe 28.
The front link and the rear link are also connected by a connecting member (not shown) in the front-rear direction.

Of the links 51, the rear link on the left side is a drive link, and the height of the cushion frame 20 can be adjusted.
More specifically, a sector gear portion (not shown) is formed as a gear on a part of the outer peripheral portion of the left rear link on the cushion frame 20 side. Is engaged with a pinion gear (not shown) provided on the left and right inner sides of the gear.

As shown in FIG. 3, the brake unit 52 has a known structure. The brake unit 52 is rotatably disposed at the center of the brake unit 52, and is attached to the left and right outer ends of the drive shaft 53. A rotating body 54 that transmits the rotation operation of the operation lever 55 to the drive shaft, and a pinion gear (not shown) that is attached to the left and right inner ends of the drive shaft 53 and transmits the rotation of the drive shaft 53 to the link 51. It is mainly composed.
When the operation lever 55 is operated, the pinion gear rotates integrally with the drive shaft 53, and the meshing position between the pinion gear and the sector gear portion changes. Further, the left rear link on which the sector gear portion is formed rotates, and the right rear link and each front link also rotate following the left rear link.
As a result, the seat body including the seat cushion 2 moves up and down, and the seat height is adjusted.

<Second Embodiment of Connecting Bracket>
Next, a second embodiment of the connection bracket 40 will be described with reference to FIG.
In addition, in the following description, the description which overlaps with the connection bracket 40 is abbreviate | omitted.
The connection bracket 140 according to the second embodiment is characterized in that the area attached to the left and right outer surfaces of the side frame portion 21 is larger than that of the connection bracket 40.
More specifically, a substantially central portion in the front-rear direction of the connection bracket 140 extends toward the lower end portion of the side frame portion 21.
Further, the connection bracket 140 is formed with a link fastening hole 141f in order to suppress interference with a connection portion between a left rear link (not shown) and the side frame portion 21.

With the above configuration, the attachment rigidity of the connection bracket 140 to the side frame portion 21 is further improved.
In particular, by attaching the connecting bracket 140, the rigidity is improved in the peripheral portion of the left link (not shown) that becomes the drive link.

<Other embodiments>
In the above-described embodiment, the rail device 4 is configured as a base member that is disposed below the cushion frame 20 and fixed to the vehicle body floor. It is good also as a structure which attached the support base which supports 20 from the downward direction to a vehicle body floor.

  In the above embodiment, the cushion frame 20 is resin-molded with the side frame part 21, the pan frame part 25, and the frame connecting part 26 as an integral part for the purpose of reducing the number of parts and facilitating the molding operation. Without being limited thereto, the elastic member 27 and other parts may be formed as an integral part or may be appropriately formed as a separate part.

  In the above embodiment, the locking hole 22b is configured as a locking portion formed on the left and right side surfaces of the side frame portion 21, but can be changed as appropriate and is recessed inwardly on the left and right sides instead of the locking hole 22b. It is good also as a structure provided with the latching groove | channel and the latching convex part which protrude to the left-right outer side.

  In the above embodiment, the fixing means between the reclining device 30 and the connecting bracket 40 and the fixing means between the connecting bracket 40 and the brake unit 52 are not particularly limited, and are adhesive bonding, welding, bolting, and rivets. Known fixing means such as fastening can be used as appropriate, and a plurality of fixing means may be combined.

  In the said embodiment, although the front part is attached to the left-right outer surface of the side frame part 21, the connection bracket 40 is attached to the right-and-left inner surface of the side frame part 21, without being limited to this. Also good.

  In the above embodiment, the claw portion 42 of the connection bracket 40 is formed continuously from the front end portion of the connection bracket 40 as shown in FIG. 5 and is composed of an insertion portion 42a and a bent portion 42b. As long as the shape can be locked in the locking hole 22b of the frame portion 21, the shape and arrangement may be changed as appropriate.

  In the above embodiment, the connection bracket 40 and the connection plate 46 are each formed from a metal material, but are not limited thereto, and may be formed from a resin material or other known materials. For example, since the connection bracket 40 and the connection plate 46 are formed of a resin material, the weight of the vehicle seat can be reduced.

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

In the present embodiment, the vehicle seat S 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.
In particular, the shape, arrangement, and configuration of the height link device 50 including the side frame portion 21, the connection bracket 40, the connection plate 46, and the brake unit 52 described in the above embodiment are merely examples. The present invention is not limited to this.

S Seat HP for vehicle Headrest pillar 1 Seat back 1a, 2a, 3a Cushion pad 1b, 2b, 3b Skin material 2 Seat cushion 3 Headrest 4 Rail device 10 Back frame 10a Front back frame 10b Rear back frame 11 Connecting member 12 Spring locking Part 20 Cushion frame 21 Side frame part 22 Frame outer wall part 22a Brake fitting hole 22b Locking hole 22c Fastener fastening hole 22d Link fastening hole 23 Frame inner wall part 23a Latching part 24 Frame upper wall part 25 Pan frame part 26 Frame connection Part 27 elastic member 28 connecting pipe 30 reclining device 31 reclining device main body 32 rotating shaft 33 spiral spring 33a one end 33b end end 40, 140 connecting bracket 41 main body wall 41a brake fitting groove 4 1b Licra fitting hole 41c Fastening hole 41d Bead part 41e Recess 141f Link fastening hole 42 Claw part 42a Insertion part 42b Bending part 43 Upper wall part 44 Lower wall part 45 Fastener 46 Connecting plate 46a Brake fitting hole 46b Hook part 47 Spring locking portion 50 Height link device 51 Link 52 Brake unit 53 Drive shaft 54 Rotating body 55 Operation lever

Claims (9)

A seat frame that is a skeleton of a vehicle seat,
In the vehicle seat, a cushion frame that is a skeleton of a seating portion, a back frame that is a skeleton of a backrest portion, a connecting bracket that connects a seat rear end side of the cushion frame and a lower end side of the back frame, and the cushion A height link device for connecting the cushion frame so as to be movable up and down with respect to a base member disposed below the frame ,
The cushion frame includes a side frame portion that forms the side in the seat width direction,
The connecting bracket is
One end side is attached to the seat width direction side surface of the side frame portion,
It has a claw part that can be locked to the locking part formed on the side frame part ,
The height link device includes a brake unit that regulates raising and lowering of the cushion frame,
The brake unit is attached to a side surface in the seat width direction of the side frame portion via the connection bracket . The side frame portions, the seat frame according to claim 1, characterized in that it is formed of a resin material. The connecting bracket is attached to the outer side surface of the side frame portion in the seat width direction,
The locking portion is a locking hole that penetrates a side surface in the seat width direction of the side frame portion,
The nail portion is
An insertion portion that continuously extends from the connection bracket in the seat width direction and is inserted into the locking hole of the side frame portion;
A bent portion that continuously bends from the extending end side of the insertion portion in the direction intersecting with the extending direction of the insertion portion and faces the inner side surface in the seat width direction of the side frame portion, The seat frame according to claim 1 or 2 . The seat frame according to any one of claims 1 to 3, wherein the claw portion is disposed above the brake unit. The brake unit, of the connecting bracket, and the claw portion in the seat front-rear direction, any one of claims 1 to 4, characterized in that said back frame is positioned between the attached portion 1 The seat frame according to the item. The connecting bracket is
It is formed at a position different from the area where the brake unit is attached, and includes a plurality of through holes penetrating in the seat width direction,
The seat frame according to any one of claims 1 to 5, wherein a peripheral portion of the through hole is joined to the side frame portion with an adhesive. The seat frame according to any one of claims 1 to 6, wherein the connection bracket is joined to the side frame portion and a fastener at a position different from a region where the brake unit is attached. The said connection bracket is formed in the position different from the area | region where the said brake unit was attached, and is provided with the bead part which protrudes in a sheet | seat width direction, The one of Claim 1 thru | or 7 characterized by the above-mentioned. Seat frame.   A vehicle seat comprising the seat frame according to any one of claims 1 to 8.

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