JP2000279261A - Seatback shock-absorbing mechanism of seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the arrangement of the seatback of a seat while keeping sitting comfort for a seater on the seat and facilitate the work of assembling the seatback. SOLUTION: A seatback 3 includes a seatback frame 4 supported on the rear end of a seat cushion 2, a backrest panel 11 enabling a seater to lean on the seatback 3, and a supporting means 13 for supporting the backrest panel 11 against the seatback frame 4. The supporting means 13 has a pair of supporting pieces 30, 30 projecting integrally backward from the backrest panel 11 and freely removably fitted over and resiliently clamping a partial frame 29 which constitutes a part of the seatback frame 4. The supporting pieces 30, 30 are longitudinally slidable relative to the partial frame 29 and are biased forward by means of their own resiliency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back cushioning structure for a vehicle seat.

[0002]

2. Description of the Related Art A conventional seat back cushioning structure for an automobile seat is disclosed in Japanese Patent Application Laid-Open No. 8-24071.

According to the above publication, a seat provided in a cabin of an automobile body has a seat cushion that can be seated when the user sits on the seat, and a seat cushion facing upward from a rear end side of the seat cushion. And a seat back that allows the seated person sitting on the seat cushion to back up.

The seat back is supported by a rear end of the seat cushion and has a frame shape when viewed from the front of the seat. The seat back is disposed in a space inside the outer frame of the seat back frame. A backrest plate to be provided, and upper and lower support means for supporting the seatback frame on the seatback frame, and these support means are elastic so that the backrest plate can be moved back and forth with respect to the seatback frame. It is supported.

[0005] When a seated person sitting on the seat cushion rests his / her upper body on the back plate of the seat back, the upper body and the back plate resiliently move with respect to the seat back frame via respective supporting means. Supported.

Therefore, when vibrations or impacts (hereinafter referred to as vibrations) are applied to the upper body of the occupant through the seat back from the vehicle body, the vibrations and the like are buffered by the elastic force of the support means. Therefore, a good sitting comfort can be obtained for the seat.

[0007]

By the way, the above-mentioned prior art sheet has the following problems.

[0008] That is, each of the support means includes a support rod erected on the seat back frame, a torsion spring supported by the support rod and interposed between the seat back frame and the back plate. And a fixture for attaching a middle part in the longitudinal direction of the torsion spring to the backrest plate.

For this reason, there is a problem that the number of components of each of the support means is increased, and the configuration of the seat back is complicated.

When assembling the seat back, first, the torsion spring is supported by the support rod, and the support rod is erected on the seat back frame. Then, the middle part of the torsion spring is backrested by the attachment. It is attached to a board,
Due to the large number of components of the support means as described above,
The work of assembling the seat back is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simplified structure of a seat back of a seat while maintaining a good sitting comfort for a seated person. An object of the present invention is to make it easy to assemble a bag.

[0012]

Means for Solving the Problems The seat back cushioning structure of the seat of the present invention for solving the above problems is as follows.

According to the first aspect of the present invention, as shown in FIGS. 1 to 7, a seat back 3 protruding upward from the rear end of the seat cushion 2 is provided on the rear end of the seat cushion 2. The seat includes a supported seat back frame 4, a back plate 11 for allowing a seated person sitting on the seat cushion 2 to be able to back, and a supporting means 13 for supporting the back plate 11 on the seat back frame 4. In the seat back buffer structure,

The support means 13 is provided with the back plate 11.
And a pair of support pieces 30 which integrally project from the rear part of the seat back frame 4 so as to be removably fitted to a part frame 29 constituting a part of the seat back frame 4 and elastically sandwich the part frame 29. , 30 so that both support pieces 30, 30 can slide back and forth with respect to the partial frame 29, and the support pieces 30, 30 are urged forward by their own elastic force. That's what I did.

As shown in FIGS. 4 to 9, the seat back 3 protruding upward from the rear end of the seat cushion 2 is provided on the rear end of the seat cushion 2. The seat includes a supported seat back frame 4, a back plate 11 for allowing a seated person sitting on the seat cushion 2 to be able to back, and a supporting means 13 for supporting the back plate 11 on the seat back frame 4. In the seat back buffer structure,

The back plate 11 has elasticity, and the support means 13 is provided with a portion 34 of the back plate 11.
A part 35 of the backrest plate 11 and another part 36 connected to the part 34.
And a slit 37 penetrating in the front-rear direction.

According to a third aspect of the present invention, as shown in FIGS. 4 to 9, in addition to the second aspect of the present invention, the front surface of the portion 34 of the backrest plate 11 is made higher than the front surface of the other portion 36. It is shifted to the rear side.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment)

FIGS. 1 to 3 show a first embodiment.

In FIGS. 1 to 3, reference numeral 1 denotes an automobile seat. This seat 1 is installed in a cabin of an automobile body so that a driver or a passenger such as a passenger can move forward (in the traveling direction of the automobile). Fr) can be seated. Less than,
The front-rear direction refers to the direction of the seat 1.

The seat 1 is supported by a vehicle body floor panel in a vehicle compartment and can be seated upon sitting on the seat 1. A seat cushion 2 is supported on a rear end side of the seat cushion 2 and has a rear end. And a seat back 3 protruding upward from the side of the section and allowing a seated person sitting on the seat cushion 2 to be able to backrest. In this case, the seat back 3 may be directly supported by the rear end of the seat cushion 2 or may be supported by the vehicle body floor panel of the vehicle interior.

The seat back 3 includes a metal seat back frame 4 which is supported by a rear end of the seat cushion 2 and has a rectangular frame shape when the seat 1 is viewed from the front. The seat back frame 4 is located apart from each other in the width direction (left-right direction) of the seat 1 and projects upward from the rear end portions of the left and right sides of the seat cushion 2 to protrude upward. A pair of sheet metal side frames 5 and 5 constituting left and right side portions of
The upper portions of the side frames 5, 5 extending in the width direction are connected to each other to form the seat back frame 4.
Upper frame 6 made of metal with circular pipes constituting the upper part of
And a lower frame 7 made of a circular pipe metal that extends in the width direction and connects lower ends of the side frames 5 and 5 to each other to form a lower portion of the seat back frame 4. 5 is attached to and supported by the rear end of the seat cushion 2.
The sheet 1 is symmetrical with respect to the center line 8 in the width direction.

The seat back 3 is disposed in the space 10 inside the outer frame of the seat back frame 4 and extends substantially in the width direction and in the vertical direction. 11, upper and lower supporting means 12 and 13 for supporting the upper and lower portions of the backrest plate 11 above and below the seat back frame 4, and adjacent to the front side of the seat back frame 4 and the backrest plate 11. An elastic pad (not shown) is provided, and an outer skin (not shown) that forms the outer surface of the seat back 3 entirely covering the seat back frame 4, the back plate 11, the pads, and the like.

The upper support means 12 extends in the width direction and has one end 15 connected to the seat back frame 4.
The other end portion 17 is attached to the upper portion of the other side frame 5 on the other side portion of the seat back frame 4 on the upper portion of the side frame 5 on one side. The torsion spring 19 is detachably locked by the other end 17 of the torsion spring. The above-mentioned seat back frame 4
In a state where the one end 15 and the other end 17 of the torsion spring 19 are locked to the upper part of the torsion spring 19, the torsion spring 19 is elastically deformed in a tensile state by applying a tensile force in its longitudinal direction, In this case, the locking state of the one end 15 and the other end 17 with respect to the upper portion of the seat back frame 4 is maintained by the elastic force of the torsion spring 19 that opposes the tensile force.

In the torsion spring 19, the side portions 20 in the width direction are located on a common axis 21 extending in the width direction, and the intermediate portion 22 in the longitudinal direction of the torsion spring 19 is The side portion 20 is formed so as to be bent from each of the opposing one end portions and to be deviated in a crank shape from the shaft center 21 to the rear thereof. Also,
One end 15 and the other end 1 of the torsion spring 19
7 is bent from the other end of each of the side portions 20 in a direction substantially orthogonal to the axis 21.

Each of the locking pieces 16 and 18 has a cylindrical shape and is mounted on the upper portion of each of the side frames 5, and the axis of each of the locking pieces 16 and 18 is substantially orthogonal to the axis 21. are doing. The one end 15 and the other end 17
Is locked by the locking pieces 16 and 18,
Rotation about the axis 21 is not possible.

The middle part 2 of the torsion spring 19
2 is bent in zigzag to form a locking portion 24,
On the other hand, a locked part 25 is formed on the upper part of the backrest plate 11 so as to be removably locked to the locking part 24 by a long hole or a notch. When the locked portion 25 is locked to the locking portion 24, the upper portion of the backrest plate 11 is locked to the middle portion 22 of the torsion spring 19. By this locking, the back plate 1 is supported on the upper portion of the seat back frame 4 via the support means 12.
The upper part of the backrest plate 11 is elastically supported so that the upper part of the backrest plate 1 can freely move back and forth.

The lower supporting means 13 integrally protrudes rearward from the rear surface of the lower end portion of the backrest plate 11 and is fitted to a partial frame 29 constituting a part of the lower frame 7 in the longitudinal direction. A pair of upper and lower elastic support pieces 30, 30 which are detachably fitted and elastically sandwich the partial frame 29 are provided. That is,
A space 31 between the support pieces 30, 30 is fitted to the partial frame 29 so as to be able to be fitted and removed from the front thereof. Each of the support pieces 30 is formed continuously over substantially the entire length of the backrest plate 11 in the width direction.

The length of the space 31 in the front-rear direction is sufficiently larger than the diameter of the partial frame 29, whereby the opposing surfaces 30a, 30 of the support pieces 30, 30 are provided.
"a" is slidably pressed back and forth with respect to the partial frame 29.

The opposing surfaces 30a, 30a of the support pieces 30, 30 are gradually separated from each other as they move rearward, and the distance between the opposing surfaces 30a, 30a gradually increases as they move rearward. It is supposed to be. As a result, the two support pieces 30, 30 are urged to slide forward by their own elastic force, that is, the elastic force (biasing force) of the two support pieces 30, 30 causes the sliding. The lower part of the backrest plate 11 is biased to move away from the partial frame 29 toward the front. In this case, since the partial frame 29 is made of a circular pipe, the fitting and disengagement of the support pieces 30 and 30 and the partial frame 29 described above are smoothly performed, and the biasing force of the support pieces 30 and 30 is used. The sliding of the support pieces 30, 30 forward is smoothly performed.

The rear ends (protruding ends) of the support pieces 30, 30 are bent so that they come closer to each other, and the support pieces 30, 30 are directed forward by their own elastic force. When slid, the two support pieces 30,
The rear end of 30 is in contact with the rear surface of the partial frame 29, and is prevented from sliding further forward.
If a large external force is applied to the backrest plate 11 toward the front, the backrest plate 11 passes between the rear ends of the support pieces 30 and 30,
With the elastic deformation of the support pieces 30, the partial frame 29 and the space 31 between the support pieces 30, 30 are removably fitted to each other.

The state of the seat 1 shown by the one-dot chain line in FIG. 1 and the solid line in FIGS. 2 and 3 indicates that the seat 1 is free and the seat 1 is free.

When a seated person sits on the seat 1 in the above-mentioned free state, and the upper body of the seat 1 is rested mainly on the upper portion of the seat back 3, the backrest plate 11 to which an external force is applied from the upper body is applied. The upper part is allowed to move a little backward with respect to the seat back frame 4, and in that state,
The upper supporting means 12 is elastically supported by the seat back frame 4 by the urging force of the torsion spring 19 toward the front (two-dot chain line in FIG. 2).

On the other hand, when the occupant rests his / her upper body mainly on the lower portion of the seat back 3, the lower portion of the back plate 11 to which an external force is applied from the upper body is applied to the partial frame 29. A slight rearward movement is allowed with the rearward sliding of the two support pieces 30, 30, and in this state, the urging force of the lower support means 13 toward the front of the two support pieces 30, 30 is allowed. 2 is elastically supported by the seat back frame 4 (indicated by a dashed line in FIG. 2).

The upper body of the occupant sitting on the seat 1 is supported by one of the upper and lower support means 12 and 13 as described above, or is elastically supported by both (not shown). Therefore, when vibration or the like is applied from the vehicle body to the upper body of the occupant through the seat back 3, the vibration or the like is generated by the torsion spring 19,
The cushion is cushioned by the elastic force of the two support pieces 30, 30, so that good sitting comfort with respect to the seat 1 is ensured.

According to the above configuration, the lower supporting means 13 for elastically supporting the backrest plate 11 on the seatback frame 4 is provided with the two support pieces 30, 30 integrally formed on the backrest plate 11. Since the configuration is such that it is fitted to the partial frame 29 of the lower frame 7 of the frame 4, the number of components of the support means 13 is extremely small as compared with the conventional technology.

Further, the mounting of the back plate 11 to the seat back frame 4 by the support means 13 is performed simply by the two support pieces 30 formed on the back plate 11.
30 is a partial frame 29 of the seat back frame 4
This is achieved by fitting and locking to

Therefore, as described above, while the good sitting comfort with respect to the seat 1 is ensured, the configuration of the seat back 3 is simplified, and the assembling work of the seat back 3 can be facilitated. .

Further, both support pieces 30,
Reference numeral 30 projects from the backrest plate 11 toward the rear thereof and fits so as to sandwich a part of the frame 29 of the seatback frame 4, so that the occupant seated on the seat 1 can rest on the backrest plate of the seatback 3. The direction of the external force applied to the support 11
This fits with the fitting direction of 0, 30 to promote this fitting.

Therefore, after the backrest plate 11 is assembled to the seatback frame 4 via the support means 13, the backrest plate 11 is prevented from being unintentionally detached from the seatback frame 4, and the seatback frame 11 is prevented from being detached. Support means 13 for back plate 11 to back frame 4
Is reliably held.

Although the above description is based on the illustrated example, the sheet 1
May be installed in the width direction of the vehicle body. Further, the configuration of the lower support means 13 may be applied to the upper support means 12.

The following figures show the second to fifth embodiments. Each of these embodiments has many points in common with the first embodiment in configuration and operation. Therefore, these common components are denoted by the same reference numerals in the drawings, and redundant description thereof will be omitted, and different points will be mainly described.

(Second Embodiment)

FIGS. 4 and 5 show a second embodiment.

When a seated person rests his / her upper body on the seat back 3, the upper side of the back rest plate 11 except for the lower end portion is mainly subjected to an external force from the upper body. The upper side is the backrest plate 11
Of the main body portion 33.

The support means 13 comprises the back plate 11
A locking portion 35 integrally formed on the rear surface of a portion 34 constituting a substantially central portion in the width direction of the seat 1 at the lower end of the seat 1 and is removably locked to the partial frame 29 of the seat back frame 4. Have. The locking portion 35 includes the support pieces 30, 30.

The portion 3 of the back plate 11
4 and other portions 36, 36, which are connected to the portion 34 in the width direction on the left and right, are formed with slits 37 penetrating in the front-rear direction. Is opened downward from the lower edge of the backrest plate 11, that is, each of the slits 37 has a cutout shape.

For this reason, the portion 34 has a structure in which it is cantilevered and supported integrally with the lower end of the main body portion 33, and is not reinforced by the other portions 36, but is singly used alone. The lower portion of the main body portion 33 integrally protrudes downward from the lower end portion, that is, the portion 34 of the backrest plate 11 is configured to easily elastically bend back and forth with the locking portion 35.

Therefore, when the occupant of the seat 1 leans his / her upper body against the seat back 3, the backrest plate 11, which is provided with an external force directed rearward from the upper body, is positioned on both sides of the partial frame 29. The sliding of the support pieces 30 and 30 backward and the elastic bending of the portion 34
A slight rearward movement is permitted, and in this state, the urging force of the two support pieces 30 and 30 toward the front and the urging force of the portion 34 of the backrest plate 11 trying to restore the original shape are obtained. It is elastically supported by the seat back frame 4 (dotted line in FIG. 5).

Therefore, when vibration or the like is to be applied to the upper body of the seated person through the seat back 3 from the vehicle body, the vibration or the like is buffered by the elastic force of the support pieces 30 and 30 and the part 34, Good sitting comfort for the seat 1 is ensured.

In the above case, the lower supporting means 13 for elastically supporting the backrest plate 11 on the seatback frame 4 is provided by the two support pieces 30, 30 of the locking portion 35 integrally formed on the backrest plate 11. 30 is fitted and locked to a part of the frame 29 of the lower frame 7 of the seat back frame 4, so that the number of components of the support means 13 is extremely small as compared with the prior art.

In addition, assembling the backrest plate 11 to the seatback frame 4 by the support means 13 simply involves attaching the two support pieces 30, 30 of the locking portion 35 formed on the backrest plate 11 to the seatback frame 4. This is achieved by fitting and locking to a part of the frame 29.

Therefore, as described above, the structure of the seat back 3 is simplified, and the assembling work of the seat back 3 can be easily performed, while the good sitting comfort with respect to the seat 1 is ensured. .

The two support pieces 30, 30 of the locking portion 35 of the support means 13 project from the backrest plate 11 toward the rear thereof, and are fitted so as to sandwich a part of the frame 29 of the seat back frame 4. Therefore, the seated person sitting on the seat 1
The direction of the external force applied to 1 coincides with the direction in which the two support pieces 30 and 30 are fitted to the partial frame 29, thereby promoting this fitting.

Therefore, after the backrest plate 11 is assembled to the seatback frame 4 via the support means 13, the backrest plate 11 is prevented from being unintentionally detached from the seatback frame 4, and the seatback frame 4 is prevented from being detached. Support means 13 for back plate 11 to back frame 4
Is reliably held.

The front surface of the portion 34 of the backrest plate 11 is deviated more rearward than the front surface of the other portion 36.

For this reason, as described above, when the occupant of the seat 1 rests his / her upper body on the seat back 3, the back plate 11 is moved rearward by the elastic bending of the portion 34. At this time, the part 34 moves forward relative to the other part 36. However, as described above, since the two parts 34 and 36 are deviated in advance, the part 34 It is suppressed that it protrudes greatly ahead of the front surface of the portion 36, and at the time of this backrest, the portion 34
And the front surface of each of the other portions 36 becomes closer to the same level (the dashed line in FIG. 5).

Therefore, since the front surface of the back plate 11 is entirely flat, the feeling of the back to the back plate 11 is kept good, that is, a good sitting comfort for the seat 1 is secured. You.

It should be noted that a pair of left and right locking portions 35 may be provided with both side portions of the lower end portion of the backrest plate 11 as portions 34.

(Third Embodiment)

FIGS. 6 and 7 show a third embodiment.

According to this, in the second embodiment, each of the notched slits 37 has a cut shape, and each of the portions 34 has upper and lower ends at the other portions 3.
6 are supported at both ends.

A plurality of the portions 34 and the other portions 36 are provided in the width direction of the sheet 1, respectively, and these are alternately arranged.

According to the above configuration, since the portion 34 is supported at both ends, free deformation of the back plate 11 is suppressed, and there is an advantage in molding that a manufacturing error can be reduced.

The other constructions and effects are the same as in the second embodiment.

(Fourth Embodiment)

FIG. 8 shows a fourth embodiment.

According to this, in the second embodiment, the support pieces 30, 30 of the locking portion 35 are non-slidably and non-slidably locked to the frame 29 from the front to the front and back. (Removably fitted).

According to the above structure, the structure of the seat back 3 is simpler than that of the second embodiment, and the seat back 3 is compact in the front-rear direction.

Other structures and effects are the same as those of the second embodiment.

(Fifth Embodiment)

FIG. 9 shows a fifth embodiment.

According to this, in the second embodiment, the locking portion 35 has an inverted U-shape that opens downward when the seat 1 is viewed from the side, and the locking portion 35 is partially framed. 29 is engaged with it from above, so as to be freely engaged and disengaged.

According to the above configuration, the downward movement of the backrest plate 11 due to its weight or the like promotes the locking of the locking portion 35 to the partial frame 29. The support of the back plate 11 by the support means 13 with respect to 4 is more reliably maintained.

Other structures and effects are the same as those of the second embodiment.

[0077]

The effects of the present invention are as follows.

According to the first aspect of the present invention, a seat back projecting upward from a rear end portion of the seat cushion is seated on the seat back frame supported by the rear end portion of the seat cushion. In a seat back cushioning structure for a seat including a backrest plate that allows a seated person to be able to backrest, and support means for supporting the backrest plate on the seatback frame.

The support means projects integrally from the backrest plate toward the rear thereof and is fitted removably with a partial frame constituting a part of the seat back frame. And a pair of support pieces that are slidable back and forth with respect to the partial frame, and that the support pieces are urged forward by their own elastic force. It is.

For this reason, when the occupant in the seat leans his / her upper body against the seat back, the above-mentioned backrest plate to which an external force directed rearward from the above-mentioned upper body is applied to both the support pieces for the partial frame. A slight rearward movement is allowed with the rearward sliding, and in this state, the support pieces are elastically supported by the seatback frame by the forward urging force of the two support pieces.

Therefore, when vibrations or the like are applied from the vehicle body to the upper body of the occupant through the seat back, the vibrations or the like are buffered by the elastic force of the two support pieces, and a good sitting comfort with respect to the seat is obtained. Secured.

In the above case, the supporting means for elastically supporting the backrest plate on the seatback frame is such that a pair of support pieces integrally formed on the backrest plate are fitted into a partial frame of the seatback frame. Therefore, the number of components of the support means is extremely small as compared with the conventional technology.

Further, the mounting of the backrest plate to the seatback frame by the support means is achieved simply by fitting both support pieces formed on the backrest plate to a part of the frame of the seatback frame. You.

Therefore, as described above, while a good sitting comfort with respect to the seat is ensured, the structure of the seat back is simplified, and the work of assembling the seat back can be facilitated.

Further, since both support pieces of the support means protrude rearward from the backrest plate and fit so as to sandwich a part of the seat back frame, the occupant sitting on the seat is seated. The direction of the external force applied to the back plate of the seat back coincides with the direction in which the two support pieces are fitted to the partial frame, thereby promoting this fitting.

Therefore, after the back plate is assembled to the seat back frame via the support means, the back plate is prevented from being inadvertently detached from the seat back frame, and the back plate for the seat back frame is prevented. Is reliably held by the supporting means.

According to a second aspect of the present invention, a seat back protruding upward from the rear end of the seat cushion is seated on the seat back frame supported by the rear end of the seat cushion and the seat cushion. In a seat back cushioning structure for a seat including a backrest plate that allows a seated person to be able to backrest, and support means for supporting the backrest plate on the seatback frame.

[0088] The backrest plate has elasticity, and the support means includes a locking portion integrally formed on a part of the backrest plate and locked to the seat back frame.
A slit penetrating in the front-rear direction is formed between the portion of the back plate and another portion connected to the portion.

For this reason, a part of the backrest plate is prevented from being reinforced by the other part due to the presence of the slit, so that the backrest plate is provided with the locking portion,
It is configured to be easily elastically bent back and forth.

Therefore, when the seated person on the seat leans his / her upper body against the seat back, the above-mentioned backrest plate to which an external force directed rearward from the above-mentioned upper body is given by the elastic bending of a part of the backrest plate. , A part of the backrest plate is elastically supported by the seatback frame by the urging force of restoring the original shape.

Therefore, when vibration or the like is applied from the vehicle body to the upper body of the seated person through the seat back, the vibration or the like is buffered by the elastic force of a part of the backrest plate, and a good sitting comfort with respect to the seat is achieved. Is secured.

In the above case, the support means for elastically supporting the backrest plate on the seatback frame has a structure in which the engaging portion integrally formed on the backrest plate is engaged with the seatback frame. In addition, the number of components of the support means is extremely small as compared with the prior art.

Further, the assembling of the backrest plate to the seatback frame by the support means is achieved simply by engaging the engaging portion formed on the backrest plate with the seatback frame.

Thus, as described above, while the good sitting comfort for the seat is ensured, the structure of the seat back is simplified, and the work of assembling the seat back can be facilitated.

According to a third aspect of the present invention, the front surface of the portion of the back plate is deviated rearward from the front surfaces of the other portions.

Therefore, as described above, when the seated person on the seat leans his / her upper body against the seat back, and the backrest plate is moved rearward by the elastic bending of the part, Will move forward with respect to the other parts, but as described above, since both parts are deviated in advance, the part protrudes greatly forward from the front surface of the other part. That is suppressed.

Therefore, since the front surface of the backrest plate is entirely flat, the feeling of the backrest on the backrest plate is kept good, that is, good sitting comfort with the seat is secured.

[Brief description of the drawings]

FIG. 1 is a developed perspective view of a seat according to a first embodiment.

FIG. 2 is a partial side view of the seat back in the first embodiment.

FIG. 3 is a plan view of the first embodiment shown in FIG. 2;

FIG. 4 is a partial perspective view of a backrest plate according to the second embodiment.

FIG. 5 is a diagram corresponding to FIG. 2 in a second embodiment.

FIG. 6 is a partial perspective view of a back plate according to the third embodiment.

FIG. 7 is a diagram corresponding to FIG. 2 in the third embodiment.

FIG. 8 is a diagram corresponding to FIG. 2 in the fourth embodiment.

FIG. 9 is a diagram corresponding to FIG. 2 in the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 3 Seat back 4 Seat back frame 13 Supporting means 29 Partial frame 30 Support piece 30a Opposing surface 31 Space 33 Main body part 34 Part 35 Locking part 36 Other part 37 Slit

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshifumi Taoka 2-1-1, Taoyuan, Ikeda-shi, Osaka Daihatsu Industry Co., Ltd. (72) In-depth Watanabe 2-4-2, Higashionancho, Toyonaka-shi, Osaka No. within Fuji Sheet Co., Ltd. (72) Inventor Masatoshi Oshima 2-4-6, Higashi-nanmachi-cho, Toyonaka-shi, Osaka F-term within Fuji Sheet Co., Ltd. 3B084 EA02 GA03

Claims (3)

[Claims] A seat back protruding upward from a rear end side of a seat cushion rests on a seat back frame supported on a rear end side of the seat cushion and a seated person sitting on the seat cushion. In a seatback cushioning structure for a seat, comprising a backrest plate enabling the backrest plate and a support means for supporting the backrest plate on the seatback frame, the support means integrally protrudes rearward from the backrest plate. A part of the seat back frame is removably fitted with a part of the frame, and a pair of support pieces for elastically sandwiching the part of the frame are provided. A seat that is slidable back and forth, and the support pieces are urged forward by their own elastic force. Seat back buffer structure. 2. A seat back protruding upward from a rear end portion of the seat cushion, rests a seat back frame supported on a rear end portion of the seat cushion, and a seated person sitting on the seat cushion. In a seat back cushioning structure for a seat, comprising: a backrest plate enabling the backrest plate and a support means for supporting the backrest plate on the seatback frame, wherein the backrest plate has elasticity, and the support means is provided in the backrest plate. A seat provided with a locking portion integrally formed on a part and locked to the seat back frame, wherein a slit penetrating in the front-rear direction is formed between the part of the backrest plate and another part connected to the part. Seat back cushioning structure. 3. The cushioning structure for a seat back according to claim 2, wherein the front surface of the portion of the backrest plate is deviated rearward from the front surface of the other portion.