JP2014034328A - Seat back frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure rigidity of a part mounted with an occupant support member in a frame body formed of a resin material.SOLUTION: In a seat back frame 1, which includes a frame body 10 formed by combining a front frame piece 14 and a back frame piece 15, both formed of a resin material, and an occupant support member 3 arranged between both end parts of the frame body 10 in the width direction of a vehicle seat S, the frame body 10 is formed by engaging a front pinching part 21 formed on the front frame piece 14 with a back pinching part 31 formed on the back frame piece 15, and the occupant support member 3 is sandwiched between the front pinching part 21 and the back pinching part 31 to be mounted to the frame body 10.

Description

  The present invention relates to a seat back frame provided in a vehicle seat on which an occupant is seated, and in particular, is disposed between a frame body formed by combining frame pieces made of a resin material and both widthwise ends of the frame body. The present invention relates to a seat back frame including an occupant support member.

  Conventionally, a seat back frame in which an occupant support member is disposed between both end portions in the width direction of a frame body is already known (see, for example, Patent Document 1). The occupant support member supports the occupant seated on the seat from the back side. The occupant support member is mainly composed of an elastic body such as a spring. For example, in the case of a vehicle seat, when the vehicle receives a rear impact load, the occupant is deformed so as to sink backward. Thereby, the influence of the rear impact load with respect to a passenger | crew comes to be relieved.

  In order to exhibit the effects as described above, the occupant support member must be appropriately attached to the frame body, for example, by being hung on a predetermined portion of the frame body. Here, when the seat back frame is made of metal, it is preferable to provide the parts constituting the attachment portion on the frame body by welding when providing the attachment portion of the occupant support member on the frame body.

JP 2012-71751 A

By the way, in recent years, a resin material has been used as the material of the frame body from the viewpoint of moldability and lightness. However, when providing a component for attaching an occupant support member to a frame body made of a resin material, it is difficult to attach the component by welding.
On the other hand, it is conceivable that a part of the frame main body is processed to integrally form an occupant support member attachment portion with the frame main body. However, in such a configuration, in order to attach the occupant support member appropriately to the frame body, the rigidity of the attachment site itself of the frame body must be ensured.

  Of course, it is required that the occupant support member attached to the frame main body can be satisfactorily maintained so that the occupant support member attached to the frame main body is not easily detached from the frame main body. In other words, it is desirable to have a configuration that can effectively regulate the movement of the occupant support member attached to the frame body relative to the frame body.

Further, the mounting position of the occupant support member in the frame body needs to be a position suitable for the occupant to sink backward when the vehicle receives a rear impact load.
Moreover, when attaching a passenger | crew support member to a flame | frame main body, it is necessary to suppress that a vehicle seat enlarges in connection with this.
Moreover, about the site | part to which a passenger | crew support member is attached among frame bodies, it is calculated | required that the ease of attachment at the time of attaching a passenger | crew support member is improved, ensuring rigidity.
Further, as described above, the occupant support member attached to the frame main body needs to be well maintained, but more specifically, the occupant support member is stabilized at the attachment position. Such a structure is required.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a seat back frame capable of ensuring the rigidity of a portion to which an occupant support member is attached in a frame body made of a resin material. There is to do.
Another object of the present invention is to effectively regulate the movement of the occupant support member attached to the frame body relative to the frame body, and further to stabilize the occupant support member at the attachment position. It is to realize such a structure.
Another object of the present invention is to set the occupant support member mounting position on the frame body to a position suitable for the occupant to sink backward when the vehicle receives a rear impact load.
Another object of the present invention is to prevent an increase in the size of a vehicle seat when an occupant support member is attached to a frame body.
Another object of the present invention is to improve the ease of attachment when attaching the occupant support member while securing the rigidity of the portion of the frame body to which the occupant support member is attached.

  According to the seat back frame of the present invention, the subject is a seat back frame provided in a vehicle seat on which an occupant is seated, wherein a front frame piece made of a resin material and a rear frame piece made of a resin material are combined. A frame main body formed, and an occupant support member disposed between both ends of the frame main body in the width direction of the vehicle seat and supporting an occupant seated on the vehicle seat from the back side, The front side clip part formed on the front frame piece and the rear side clip part formed on the rear frame piece are engaged with each other to form the frame body, and the occupant support member is connected to the front side clip part. It is solved by being attached to the frame main body by being sandwiched between the rear sandwiching portion and the rear sandwiching portion.

  In the above seat back frame, the occupant support member is attached to the frame main body by being sandwiched between the front frame piece and the rear frame piece constituting the frame main body. And since the site | part which pinches | interposes a passenger | crew support member in each frame piece is a part which engages when combining frame pieces, its rigidity is comparatively high. Therefore, if it is said seat back frame, it becomes possible to ensure the rigidity of the site | part to which a passenger | crew support member is attached in the frame main body which consists of resin materials.

Further, in the above seat back frame, the movement restricting portion that restricts movement of the occupant support member from the position sandwiched between the front sandwiching portion and the rear sandwiching portion to the inner side in the width direction, It is preferable that it is formed in at least one of the front side pinching portion and the rear side pinching portion.
With the above configuration, the occupant support member is prevented from moving inward in the width direction from the position sandwiched between the front nip part and the rear nip part, and the occupant support member is stabilized at the attachment position in the frame body. It becomes possible to keep it.

In the above-described seat back frame, it is more preferable that the movement restricting portion is formed in each of the front side pinching portion and the rear side pinching portion.
If it is the above structure, it will become possible to control more effectively that a passenger | crew support member moves to the width direction inner side from the position pinched | interposed between a front side clamping part and a rear side clamping part.

Further, in the above-described seat back frame, in the state where the front side sandwiching portion and the rear side sandwiching portion are engaged with each other, the movement restricting portion formed in the front side sandwiching portion and the rear side sandwiching portion are provided. It is even more preferable that the formed movement restricting portions are arranged in positions adjacent to each other in the width direction and facing each other.
If it is the above structure, it will become possible to control still more effectively that a passenger | crew support member moves to the width direction inner side from the position pinched | interposed between a front side clamping part and a rear side clamping part.

Further, in the above-described seat back frame, in a state where the front side sandwiching portion and the rear side sandwiching portion are engaged with each other, the movement restricting portion formed in the rear side sandwiching portion is formed in the front side sandwiching portion. It is more preferable that it is located on the inner side in the width direction than the movement restricting portion.
With the configuration described above, the front end position of the movement restricting portion formed in the rear sandwiching portion is behind the front end position of the front sandwiching portion in a state where the front sandwiching portion and the rear sandwiching portion are engaged with each other. Will come to be located. That is, a step is formed between the front end of the movement restricting portion formed in the rear side pinching portion and the front end of the front side pinching portion. As a result, the space in which the occupant can sink in the vehicle seat is expanded by the amount corresponding to the level difference, so that a greater amount of occupant sinking can be ensured.

Further, in the above-described seat back frame, the front side sandwiching portion includes a front convex portion formed to protrude inward in the width direction from an end portion of the front side frame piece in the width direction, and the rear side sandwiching portion. Is preferably provided with a rear-side convex portion that protrudes inward in the width direction from an end portion of the rear-side frame piece in the width direction.
If it is the above structure, since the convex part of each clamping part protrudes in the width direction inner side from the width direction edge part of each frame piece, the enlargement of a seat back frame, especially the expansion to the width direction outer side is suppressed. It becomes possible.

Further, in the above seat back frame, the front convex portion protrudes from a region located on the rear end side in the front-rear direction of the vehicle seat among the end portions of the front frame piece in the width direction. More preferred.
With the above configuration, in the configuration in which the occupant support member is sandwiched between the frame pieces, the occupant support member is disposed further rearward in the front-rear direction of the vehicle seat. Since the position of the occupant support member is a position suitable for the occupant to sink backward due to the rear impact load received by the vehicle, in the vehicle seat provided with the occupant support member, the sinking amount of the occupant is small. It will be secured appropriately.

Further, in the above seat back frame, each of the front convex portion and the rear convex portion has a top surface located on the innermost side in the width direction and three adjacent surfaces adjacent to the top surface. And, among the three adjacent surfaces of at least one of the front convex portion and the rear convex portion, the uppermost surface located on the uppermost side is an inclined surface located downward as it approaches the top surface. Even more preferred.
If it is the above structure, since the upper surface of at least one of a front side convex part and a rear side convex part is an inclined surface, the area of an upper surface becomes larger. As a result, since the upper surface is easily visible, workability is improved, for example, when the occupant support member is attached between the front convex portion and the rear convex portion, the position of the upper surface is easily confirmed.

Further, in the above-described seat back frame, the width direction from the position where the occupant support member is sandwiched between the front side sandwiching part and the rear side sandwiching part is provided in each of the front side sandwiching part and the rear side sandwiching part. A movement restricting portion that restricts movement to the inside of the front side, and the movement restricting portion formed on the front side pinching portion when the front side pinching portion and the rear side pinching portion are engaged with each other. Extends from the rear end of the front convex portion and extends to the rear of the front end of the rear convex portion, and the movement restricting portion formed in the rear sandwiching portion is a front end of the rear convex portion. It is more preferable that it extends from the front end to the front of the rear end of the front convex portion.
If it is the above structure, the movement control part formed in each of a front side convex part and a rear side convex part is extended so that it may reach the edge of the front side of the front-back direction of a convex part which makes a pair. Accordingly, the occupant support member is disposed at a position sandwiched between the front sandwiching portion and the rear sandwiching portion while being restricted by the movement restricting portion. As a result, the mounting state of the occupant support member can be stably maintained.

In the above seat back frame, each of the front convex portion and the rear convex portion has a top surface located on the innermost side in the width direction, and the movement restricting portion formed in the front sandwiching portion. The upper and lower ends of the movement restricting portion formed between the upper and lower ends of the top surface of the front convex portion in the vertical direction and the movement restricting portion formed in the rear sandwiching portion are arranged in the vertical direction. It is more preferable that it is located between the upper end and the lower end of the top surface of the rear convex portion.
With the above configuration, the movement restricting portion is accommodated between the upper end and the lower end of each convex portion in the up-down direction, and thus it is possible to suppress an increase in the size of the seat back frame, in particular, an expansion in the up-down direction.

Further, in the above-described seat back frame, in the state where the front side sandwiching portion and the rear side sandwiching portion are engaged with each other, the movement restricting portion formed in the front side sandwiching portion and the rear side sandwiching portion are provided. The formed movement restricting portions are arranged adjacent to each other in the width direction and opposed to each other, and the occupant support member extends along the width direction while meandering in the vertical direction, and the front side An upper end and a lower end of the movement restricting portion formed in each of the sandwiching portion and the rear sandwiching portion are positioned between an upper end position and a lower end position that the occupant support member meanders and reaches in the vertical direction. And more preferred.
If it is the above structure, since a movement control part will be settled in the range where a passenger | crew support member exists in an up-down direction, it will become possible to suppress the enlargement of the seat back frame in an up-down direction more effectively.

In the seat back frame, in a state where the front convex portion and the rear convex portion are engaged with each other, a gap is formed between the front convex portion and the rear convex portion, and the gap By inserting the end portion of the occupant support member in the width direction, the occupant support member is sandwiched between the front sandwiching portion and the rear sandwiching portion, and is provided in the gap. It is preferable that the opening on the side where the end portion of the occupant support member is inserted is formed to be long along the width direction.
If it is the above structure, since the opening of the clearance gap formed between a front side convex part and a rear side convex part is long along the width direction, it becomes easy to insert a passenger | crew support member in the said clearance gap, and a passenger | crew support member's Assembly is improved.

According to the first aspect of the present invention, it is possible to provide a seat back frame in which the rigidity of the portion to which the occupant support member is attached is secured in the frame body made of a resin material.
According to the invention described in claim 2 of the present invention, the occupant support member is restricted from moving inward in the width direction from the position sandwiched between the front side sandwiching portion and the rear side sandwiching portion, and is attached to the frame main body. It is possible to stably hold the occupant support member at the position.
According to the invention described in claim 3 of the present invention, the occupant support member is more effectively restricted from moving inward in the width direction from the position sandwiched between the front and rear clip portions. Is possible.
According to the invention described in claim 4 of the present invention, the movement of the occupant support member to the inner side in the width direction from the position sandwiched between the front side sandwiching portion and the rear side sandwiching portion is more effectively regulated. It becomes possible.
According to the invention described in claim 5 of the present invention, a step is formed between the front end of the movement restricting portion formed in the rear sandwiching portion and the front end of the front sandwiching portion, and the passenger sinks by the amount of the step. Since the space that can be accommodated is expanded, a greater amount of sinking of the occupant is secured in the vehicle seat.
According to the invention described in claim 6 of the present invention, it is possible to suppress the enlargement of the seat back frame, in particular, the spread outward in the width direction.
According to the invention described in claim 7 of the present invention, since the occupant support member is disposed further rearward in the front-rear direction of the vehicle seat, in the vehicle seat including the seat back frame including the occupant support member, The amount of occupant sinking will be ensured appropriately.
According to the invention described in claim 8 of the present invention, since the upper surface of at least one of the front convex portion and the rear convex portion is easily visible, the passenger support is provided between the front sandwiched portion and the rear sandwiched portion. When the member is sandwiched, the workability is improved, for example, the position of the upper surface can be easily confirmed.
According to the invention described in claim 9 of the present invention, since the occupant support member is disposed at a position sandwiched between the front nip portion and the rear nip portion while being restricted by the movement restricting portion, the occupant support member is attached. Can be held stably.
According to the tenth aspect of the present invention, since the movement restricting portion is accommodated between the upper end and the lower end of each convex portion in the vertical direction, the enlargement of the seat back frame, in particular, the spread in the vertical direction is suppressed. It becomes possible to do.
According to the eleventh aspect of the present invention, since the movement restricting portion is within the range in which the occupant support member exists in the vertical direction, the increase in the size of the seat back frame in the vertical direction can be more effectively suppressed. Is possible.
According to the twelfth aspect of the present invention, the end of the occupant support member can be easily inserted into the gap formed between the front convex portion and the rear convex portion. Will improve.

It is an external view of a vehicle seat. It is a perspective view which shows the seat frame of the vehicle seat. It is a front view of the seat back frame concerning one embodiment of the present invention. It is a rear view of the seat back frame concerning one embodiment of the present invention. It is a perspective view showing a crew member supporting member concerning one embodiment of the present invention, and its peripheral structure. It is a figure which shows the attachment structure of the passenger | crew support member which concerns on one Embodiment of this invention, and is an enlarged view about the range X in FIG. It is a figure which shows the attachment structure of the passenger | crew support member which concerns on one Embodiment of this invention, and is a figure when the said attachment structure is looked down at. It is a figure which shows the attachment structure of the passenger | crew support member which concerns on one Embodiment of this invention, and is explanatory drawing about a front side convex part and a rear side convex part. It is a perspective view which shows the front side convex part which concerns on one Embodiment of this invention. It is a side view of the front side convex part which concerns on one Embodiment of this invention. It is a perspective view which shows the rear side convex part which concerns on one Embodiment of this invention. It is a front view of the rear side convex part which concerns on one Embodiment of this invention. It is a figure which shows the positional relationship of the front side convex part in one Embodiment of this invention, a rear side convex part, and a passenger | crew support member, and is AA sectional drawing of FIG.

Hereinafter, a vehicle seat according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS.
FIG. 1 is an external view of a vehicle seat. FIG. 2 is a perspective view showing a seat frame of a vehicle seat. 3 and 4 are views showing a seat back frame according to an embodiment of the present invention, FIG. 3 is a front view, and FIG. 4 is a rear view. FIG. 5 is a perspective view showing an occupant support member and its peripheral structure according to an embodiment of the present invention. FIGS. 6 to 8 are views showing an occupant support member mounting structure according to an embodiment of the present invention, FIG. 6 is an enlarged view of a range X in FIG. 5, and FIG. 7 is an overhead view of the mounting structure. It is a figure of time, and FIG. 8 is explanatory drawing about a front side convex part and a rear side convex part. 9 and 10 are diagrams showing a front convex portion according to an embodiment of the present invention, FIG. 9 is a perspective view, and FIG. 10 is a side view. 11 and 12 are diagrams showing a rear convex portion according to an embodiment of the present invention, FIG. 11 is a perspective view, and FIG. 12 is a front view. FIG. 13 is a diagram showing a positional relationship among the front convex portion, the rear convex portion, and the occupant support member according to the embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG.

Here, in the following description, the front-rear direction of the vehicle seat is a direction that coincides with the traveling direction of the vehicle, and is hereinafter simply referred to as the front-rear direction. Further, the width direction of the vehicle seat is a direction that coincides with the direction along the width of the vehicle, and is simply referred to as the width direction below. Further, the vertical direction is the vertical direction of the vehicle.
In the following description, unless otherwise specified, the configuration when the vehicle seat is in use, i.e., when the occupant is seated on the vehicle seat, is shown in the following description. And the position are the direction and position in the above state.

  A vehicle seat S according to an embodiment of the present invention (hereinafter referred to as “this embodiment”) is a seat on which a vehicle occupant is seated. As shown in FIG. 1, the vehicle seat S includes a seat back S1 on which an occupant leans, a seat cushion S2 on which the occupant's buttocks are placed, and a headrest S3 that supports the occupant's head. The seat back S1 and the seat cushion S2 are configured by disposing cushion pads (not shown) on the frames 1 and 2 and being covered with a skin material (not shown). The headrest S3 is configured by arranging a cushion pad (not shown) on a heart material (not shown) and covering with a skin material (not shown). The headrest S3 is supported by a headrest pillar HP attached to the seat back frame 1.

  As shown in FIG. 2, the frame of the vehicle seat S according to the present embodiment includes a seat back frame 1 constituting the seat back S <b> 1 and a seat cushion frame 2 constituting the seat cushion S <b> 2. The seat cushion frame 2 is formed so as to form a rectangular frame in plan view, and in particular in the present embodiment, the seat cushion frame 2 is integrally formed of carbon fiber reinforced plastic (CFRP) as a resin material.

  As shown in FIGS. 3 and 4, the seat back frame 1 includes a frame body 10 that forms a rectangular frame when viewed from the front, and an occupant support member 3 that includes a spring meandering in an S shape (so-called S spring). Have. The frame body 10 includes an upper frame 11 formed in a substantially trapezoidal shape, a pair of side frames 12 formed in a state of being separated from each other in the width direction, and a lower frame 13 that connects the lower ends of the side frames 12 to each other. . Here, the pair of side frames 12 correspond to both end portions of the frame body 10 in the width direction.

  And the frame main body 10 which concerns on this embodiment is comprised by combining the frame pieces 14 and 15 divided | segmented into two front and back. The two frame pieces 14 and 15 constituting the frame body 10 are both made of CFRP as a resin material and are integrally formed by molding. The material of the frame pieces 14 and 15 is not limited to CFRP, and other resin materials other than CFRP, for example, plastic without carbon fiber may be used. Further, the method of forming the frame pieces 14 and 15 is not limited to the case where CFRP is put into the mold and integrally molded, and a method other than the mold molding, for example, a sheet made of a resin material is matched to the frame shape. The frame pieces 14 and 15 may be formed by laminating them.

  Each of the two frame pieces 14 and 15 has a portion corresponding to the upper frame 11, a portion corresponding to the side frame 12, and a portion corresponding to the lower frame 13. Here, the portion corresponding to the upper frame 11 is a portion constituting the upper frame 11 when the frame pieces 14 and 15 are combined with each other in the frame pieces 14 and 15. Similarly, the portion corresponding to the side frame 12 is a portion constituting the side frame 12 when the frame pieces 14 and 15 are combined in the frame pieces 14 and 15. Further, the portion corresponding to the lower frame 13 is a portion constituting the lower frame 13 when the frame pieces 14 and 15 are combined.

  When the frame pieces 14 and 15 are combined with each other, the hollow frame body 10 is formed. More specifically, for example, the cross section when cut along the horizontal plane of the side frame 12 has a closed cross-sectional structure. .

  The frame pieces 14 and 15 will be described in detail later. In the following description, of the two frame pieces 14 and 15, the frame piece 14 disposed on the front side in the vehicle seat S is referred to as a front frame piece 14, and the frame piece 15 disposed on the rear side. Is referred to as a rear frame piece 15.

  The occupant support member 3 is attached to the frame body 10 while extending in the width direction while meandering in the vertical direction. In particular, in the present embodiment, the occupant support member 3 is disposed in a substantially rectangular hole RH surrounded by the upper frame 11, the side frame 12, and the lower frame 13 of the frame body 10. While the occupant support member 3 normally supports the occupant seated on the vehicle seat S from the back side, the occupant support member 3 is deformed so that the occupant sinks backward when the vehicle receives a rear impact load. Thus, when the passenger | crew support member 3 deform | transforms, the influence of the rear impact load with respect to a passenger | crew will be relieve | moderated.

  In the present embodiment, the two occupant support members 3 are disposed in the hole RH in a state of being separated from each other in the vertical direction. However, it is sufficient that at least one occupant support member 3 is provided, and the number thereof can be arbitrarily set.

  And in this embodiment, if the width direction both ends of the passenger | crew support member 3 are attached to the attachment site | part formed in each side frame 12, the passenger | crew support member 3 comes to be arrange | positioned in said hole RH. More specifically, the occupant support member 3 is bridged from one side frame 12 to the other side frame 12 along the width direction. The passenger support member 3 is disposed between the side frames 12 by such a procedure. Moreover, in the said arrangement position, the passenger | crew support member 3 is extended along the width direction, meandering to an up-down direction.

  On the other hand, in this embodiment, a part for attaching the occupant support member 3 is formed on a part of the side frame 12 of the frame body 10, and the part to be attached is integrated with the other parts in the side frame 12 by CFRP. Is formed.

By the way, as explained in the section of the problem to be solved by the invention, in the configuration in which a part of the frame main body 10 made of CFRP is processed to form the attachment portion of the occupant support member 3, the occupant support member 3 is attached to the frame main body. In order to attach appropriately with respect to 10, it is necessary to ensure the rigidity of the attachment part itself among the frame main bodies 10.
For this reason, in the present embodiment, a portion having relatively high rigidity in the frame main body 10 is used as the attachment portion of the occupant support member 3, and as a result, the occupant support member 3 is attached to the frame main body 10 in a favorable state. It becomes possible to hold.
The mounting structure of the occupant support member 3 according to this embodiment will be described in detail later.

Next, the frame main body 10 and the frame pieces 14 and 15 that are constituent elements thereof will be described in detail.
First, the front frame piece 14 will be described. In the front frame piece 14, most of the portion corresponding to the upper frame 11, the portion corresponding to the side frame 12, and the portion corresponding to the lower frame 13 bulge forward. Yes. As shown in FIG. 2, in the present embodiment, a part of the front frame piece 14 corresponding to the upper frame 11 extends along the vertical direction, and holds the headrest pillar HP. 14h is formed.

  Furthermore, the front side clip part 21 formed in the inner surface 14b of the said part is provided in the part corresponding to the side frame 12 of the front side frame piece 14. As shown in FIG. The front pinching portion 21 cooperates with a rear pinching portion 31 described later and holds the end portion of the occupant support member 3. As a result, the occupant support member 3 is attached to the frame body 10. In addition, the inner surface 14b on which the front sandwiching portion 21 is formed corresponds to an end portion of the front frame piece 14 in the width direction.

  The front side clip part 21 will be described in more detail. As shown in FIGS. 9 and 10, the front side clip part 21 includes a front convex part 22 that protrudes inward in the width direction from the inner surface 14b. The front convex portion 22 is formed by protruding a predetermined region of a portion corresponding to the side frame 12 in the front frame piece 14 in a substantially rectangular shape inward in the width direction. Moreover, the front convex part 22 has the top surface 24 located in the innermost side in the width direction. The top surface 24 is a flat surface whose normal direction is the width direction.

  Further, the front convex portion 22 has three adjacent surfaces adjacent to the top surface 24. Specifically, the upper surface 25 is located on the uppermost side, the front surface 26 is located on the most front side, and the lowermost side. It has a lower surface 27 located on the side. The rear end of the front convex portion 22 is an open end.

  In the present embodiment, the upper surface 25, the front surface 26, and the lower surface 27 are all inclined surfaces. If it demonstrates concretely, the upper surface 25 will incline so that it may be located below, so that it approaches the top surface 24, ie, goes to the width direction inner side. The front surface 26 is inclined so as to be located rearward as it approaches the top surface 24, that is, toward the inner side in the width direction. The lower surface 27 is inclined so as to be positioned higher as it approaches the top surface 24, that is, toward the width direction. As shown in FIG. 10, in each of the upper surface 25, the front surface 26, and the lower surface 27, the end portion on the side adjacent to the top surface 24 is curved in an arch shape.

  Further, as shown in FIGS. 9 and 10, the front sandwiching portion 21 has a wall-like protrusion 23 protruding rearward from a wall surface located at the rear end of the front convex portion 22, specifically, a wall surface adjacent to the top surface 24. Is formed. This tongue-like protrusion 23 functions as a movement restricting portion described later in the present embodiment.

And in this embodiment, about the tongue-shaped protrusion 23 as a movement control part formed in the front side clamping part 21, the upper end and lower end are between the upper end and lower end of the top surface 24 of the front side convex part 22 in an up-down direction. Is located. More specifically, the tongue-like protrusion 23 extends rearward from a region located substantially at the center in the vertical direction on the rear end wall surface of the front convex portion 22.
As described above, in the present embodiment, the movement restricting portion formed in the front side pinching portion 21 fits between the upper end and the lower end of the front convex portion 22 in the vertical direction, strictly between the upper end and the lower end of the top surface 24. Therefore, it is possible to suppress an increase in the size of the seat back frame 1, particularly an expansion in the vertical direction.

As shown in FIG. 3, in the present embodiment, two front side clip portions 21 are provided side by side in a portion corresponding to each side frame 12. In other words, in the present embodiment, two sets of a pair of front side clip portions 21 that face each other in the width direction, in other words, a total of four front side clip portions 21 are provided on the front frame piece 14.
Furthermore, as shown in FIG. 10, the front convex part 22 which each front side clamping part 21 has is a region located on the rear end side of the inner surface 14b, more specifically, the center of the inner surface 14b in the front-rear direction. It protrudes from the area located rearward.

  Next, the rear frame piece 15 will be described. In the rear frame piece 15, most of the part corresponding to the upper frame 11, the part corresponding to the side frame 12, and the part corresponding to the lower frame 13 are rear side. It bulges out. More specifically, an outer edge wall 15a formed along the outer edge of the rear frame piece 15 and an inner edge wall 15b formed along the inner edge protrude forward. As shown in FIG. 3, a part of the rear frame piece 15 corresponding to the upper frame 11 extends upward and cooperates with the holding portion 14 h of the front frame piece 14. A holding portion 15h that holds the headrest pillar HP is formed.

  As shown in FIG. 3, the outer edge of the rear frame piece 15 is slightly larger than the outer edge of the front frame piece 14, while the inner edge of the rear frame piece 15 is larger than the inner edge of the front frame piece 14. Is one size smaller. The rear frame piece 15 has a recess formed between the outer edge wall 15a and the inner edge wall 15b described above, and the rear end portion of the front frame piece 14 is fitted into the recess. Yes. Thus, the front frame piece 14 is fitted into the recess formed in the rear frame piece 15, and the frame main body 10 is formed by combining the frame pieces 14 and 15. Note that the frame pieces 14 and 15 after being combined are joined to each other using an adhesive or the like in order to maintain the combined state.

  In addition, a portion corresponding to the side frame 12 of the rear frame piece 15 is provided with a rear sandwiching portion 31 formed on the inner edge wall 15b located in the portion. The rear sandwiching portion 31 is formed so as to be engageable with the front sandwiching portion 21 of the front frame piece 14, and holds the end portion of the occupant support member 3 in cooperation with the front sandwiching portion 21. The inner edge wall 15b in which the rear sandwiching portion 31 is formed corresponds to the end portion of the rear frame piece 15 in the width direction.

  The rear sandwiching portion 31 will be described in more detail. As shown in FIGS. 11 and 12, the rear sandwiching portion 31 includes a rear convex portion 32 formed by bulging the inner edge wall 15b in the width direction. Yes. The rear convex portion 32 is formed by protruding a predetermined region of a portion corresponding to the side frame 12 in the rear frame piece 15 in a substantially rectangular shape inward in the width direction. Moreover, the rear side convex part 32 has the top surface 34 located in the innermost side in the width direction. The top surface 34 is a flat surface whose normal direction is the width direction.

  Further, the rear convex portion 32 has three adjacent surfaces adjacent to the top surface 34. Specifically, the upper surface 35 located on the uppermost side, the rear surface 36 located on the rearmost side, and It has the lower surface 37 located in the lowest side. The front end of the rear convex portion 32 is an open end.

  In the present embodiment, the upper surface 35, the rear surface 36, and the lower surface 37 are all inclined surfaces. If it demonstrates concretely, the upper surface 35 will incline so that it may be located below, so that it approaches the top surface 34, ie, goes to the width direction inner side. The rear surface 36 is inclined so as to be positioned forward as it approaches the top surface 34, that is, toward the inner side in the width direction. The lower surface 37 is inclined so as to be positioned higher as it approaches the top surface 34, that is, toward the width direction. As shown in FIGS. 11 and 12, in each of the upper surface 35, the rear surface 36, and the lower surface 37, the end portion adjacent to the top surface 34 is curved in an arch shape.

  As shown in FIGS. 11 and 12, the rear sandwiching portion 31 has a tongue-like protrusion 33 protruding forward from a wall surface located at the front end of the rear convex portion 32, specifically, a wall surface adjacent to the top surface 34. Is formed. This tongue-like protrusion 33 functions as a movement restricting portion described later in the present embodiment.

And in this embodiment, about the tongue-shaped protrusion 33 as a movement control part formed in the back side clamping part 31, the upper end and lower end are the upper end and lower end of the top surface 34 of the rear side convex part 32 in an up-down direction. Located between. More specifically, the tongue-like projection 33 extends forward from a region located substantially in the center in the vertical direction on the front end wall surface of the rear convex portion 32.
As described above, in the present embodiment, the tongue-shaped protrusion 33 formed on the rear sandwiching portion 31 is between the upper end and the lower end of the rear convex portion 32 in the vertical direction, strictly between the upper end and the lower end of the top surface 34. Therefore, it is possible to suppress an increase in the size of the seat back frame 1, particularly an expansion in the vertical direction.

As shown in FIG. 4, in this embodiment, two rear sandwiching portions 31 are provided side by side in a portion corresponding to each side frame 12. In other words, in the present embodiment, two pairs of rear sandwiching portions 31 facing each other in the width direction are provided on the rear frame piece 15 in other words, that is, a total of four rear sandwiching portions 31 are provided.
Furthermore, as shown in FIG. 12, the rear convex portion 32 of each rear sandwiching portion 31 is a region located on the rear end side in the portion corresponding to the side frame 12 in the rear frame piece 15. Specifically, it protrudes from a region located behind the center of the portion corresponding to the side frame 12 in the front-rear direction.

  When the frame pieces 14 and 15 are combined with each other, the front clip portions 21 are engaged with the corresponding rear clip portions 31. In other words, the frame main body 10 is formed by engaging each front pinching portion 21 with the corresponding rear pinching portion 31. Here, as shown in FIGS. 5, 6, and 13, the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged with each other, as shown in FIGS. 5, 6, and 13. , Combining them so that they overlap in the width direction.

  Hereinafter, the engagement state between the front side pinching portion 21 and the rear side pinching portion 31 will be described in more detail. When the front side sandwiching portion 21 and the rear side sandwiching portion 31 in the engaged state are viewed from the front, as shown in FIG. 3, the front side sandwiching portion is in a space surrounded by the inner edge wall 15b constituting the rear convex portion 32. 21 has entered. Further, as shown in FIGS. 6 and 13, the tongue-like protrusion 23 of the front sandwiching portion 21 and the tongue-like projection 33 of the rear sandwiching portion 31 are arranged adjacent to each other in the width direction and facing each other. . In the present embodiment, the tongue-shaped protrusion 33 formed on the rear side pinching portion 31 in a state where the front side pinching portion 21 and the rear side pinching portion 31 are engaged with each other, the tongue formed on the front side pinching portion 21. It is on the inner side in the width direction than the protrusion 23.

  Furthermore, as shown in FIGS. 5, 6, and 13, in the state where the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged, the tongue-like projections 23 and 33 formed on the sandwiching portions 21 and 31 are formed. In the front-rear direction, the projections 22 and 32 of the pair of sandwiching portions 21 and 31 are reached. More specifically, the tongue-like protrusion 23 formed on the front sandwiching portion 21 extends from the rear end of the front convex portion 22 in a state where the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged with each other. The rear convex portion 32 extends further to the rear than the front end. On the other hand, the tongue-shaped projection 33 formed on the rear sandwiching portion 31 extends from the front end of the rear convex portion 32 and extends further forward than the rear end of the front convex portion 22.

  As shown in FIGS. 6 to 8, in a state where the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged with each other, between the rear end of the front convex portion 22 and the front end of the rear convex portion 32. A gap D is formed. When the end of the occupant support member 3 is inserted into the gap D, the occupant support member 3 is sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31. As described above, in this embodiment, the occupant support member 3 is attached to the frame body 10 as a result of the occupant support member 3 being sandwiched between the front nip portion 21 and the rear nip portion 31.

  As described above, in the seat back frame 1 according to the present embodiment, the occupant support member 3 is attached to the frame body 10 by being sandwiched between the front frame piece 14 and the rear frame piece 15. And since the site | part which pinches | combines the passenger | crew support member 3 in each frame piece 14 and 15 is a part which engages when combining the frame pieces 14 and 15, mutually, the rigidity is comparatively high. Thereby, in this embodiment, it becomes possible to ensure the rigidity of the attachment site | part of the passenger | crew support member 3 in the frame main body 10 which consists of CFRP.

  In the present embodiment, each of the frame pieces 14 and 15 sandwiches the occupant support member 3, that is, the front convex portion 22 and the rear convex portion 32 are both end portions in the width direction of the frame pieces 14 and 15. And projecting inward in the width direction. By adopting such a configuration, the seat back frame 1 is increased in size compared to the configuration in which the portion sandwiching the occupant support member 3 is provided on the outer side in the width direction of each frame piece 14, 15, particularly on the outer side in the width direction. The spread to is suppressed.

  Moreover, in this embodiment, as mentioned above, the front side convex part 22 with which each front side clamping part 21 was equipped protrudes from the area | region located in the rear end side among the width direction edge parts of the front side frame piece 14. As shown in FIG. . Similarly, the rear side convex part 32 with which each rear side clip part 31 was equipped protrudes from the area | region located in the rear end side among the width direction edge parts of the rear side frame piece 15. FIG. As described above, the arrangement positions of the front convex portion 22 and the rear convex portion 32 are set so as to be located further rearward in the front-rear direction, so that the occupant support sandwiched between the front sandwiched portion 21 and the rear sandwiched portion 31 The member 3 is also arranged rearward. On the other hand, the more the occupant support member 3 is located rearward, the larger the amount of subsidence when the occupant seated on the vehicle seat S sinks rearward due to the rear impact load applied to the vehicle. become. Therefore, in the vehicle seat S according to the present embodiment, the amount of sinking of the occupant is appropriately secured by adopting the above configuration.

  In the present embodiment, as shown in FIG. 6, the gap D described above is formed long along the width direction. If it demonstrates concretely, the opening by which the edge part of the passenger | crew support member 3 with which the clearance gap D was inserted will be formed so that it may become long in the width direction. More specifically, the opening of the gap D has a length corresponding to the protruding amount of the convex portions 22 and 32 included in each sandwiched portion 21 and 31. Thus, since the insertion port of the occupant support member 3 is formed long along the width direction, the occupant support member 3 can be easily inserted into the gap D, and the assemblability of the occupant support member 3 is improved accordingly. Will do.

  Further, when the frame pieces 14 and 15 are combined with each other, the frame main body 10 is formed. In the side frame 12 of the frame main body 10, in the region adjacent to the gap D described above, the elongated holes illustrated in FIGS. A shaped adjacent hole Dr is formed. The adjacent hole Dr is formed on the inner surface in the width direction of the side frame 12 and has a slight length along the vertical direction. Thus, since the adjacent hole Dr is provided so as to be continuous with the gap D formed between the front convex part 22 and the rear convex part 32, it is more possible to insert the occupant support member 3 into the gap D. It becomes easy and the assembly | attachment property of the passenger | crew support member 3 improves more.

  Furthermore, in the present embodiment, the upper end of the adjacent hole Dr is positioned higher than the upper end of the occupant support member 3 in a state where the occupant support member 3 is attached to the frame body 10. Here, the upper end of the occupant support member 3 is an upper end position at which the occupant support member 3 snakes up and down. Since the upper end of the adjacent hole Dr is positioned above the upper end of the occupant support member 3 in this way, it becomes even easier to insert the occupant support member 3 into the gap D, and the assembleability of the occupant support member 3 is further improved. It will be further improved.

  In addition, in the present embodiment, as described above, the upper surface 25 of the front convex portion 22 and the upper surface 35 of the rear convex portion 32 are inclined surfaces that are inclined so as to be positioned downward toward the inner side in the width direction. It has become. Since the upper surfaces 25 and 35 are inclined in this manner, the upper surfaces 25 and 35 are easily visible, and therefore, when the occupant support member 3 is sandwiched between the front convex portion 22 and the rear convex portion 32. In addition, the positions of the upper surfaces 25 and 35 can be easily confirmed. To explain in an easy-to-understand manner, when the end portion of the occupant support member 3 is inserted into the gap D between the front convex portion 22 and the rear convex portion 32, the position of the opening of the gap D can be easily found. Moreover, since each upper surface 25 and 35 inclines so that it may be located below, so that it goes to the width direction inner side, when inserting the edge part of the passenger | crew support member 3 in said clearance gap D, the passenger | crew support member 3 is the upper surface 25. , 35 can be suppressed. Thus, since each upper surface 25 and 35 is an inclined surface, the workability | operativity at the time of attaching the passenger | crew support member 3 improves.

  By the way, when the end portion of the occupant support member 3 is inserted into the gap D between the front convex portion 22 and the rear convex portion 32, the occupant support inserted into the gap D as shown in FIGS. Tongue-like projections 23 and 33 formed in the sandwiching portions 21 and 31 are arranged at positions adjacent to the end portion of the member 3 in the width direction. Thereby, even if the end portion of the occupant support member 3 tries to move inward in the width direction, the end portion is locked by the tongue-like protrusions 23 and 33, so that the movement of the occupant support member 3 in the same direction is restricted. Will be. As a result, the occupant support member 3 is held at a position where it is sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31.

  As described above, in the present embodiment, the tongue-like protrusions 23 and 33 formed in the respective sandwiching portions 21 and 31 are positions where the occupant support member 3 is sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31. Functions as a movement restricting portion that restricts movement inward in the width direction. By providing the tongue-like projections 23 and 33 as such movement restricting portions, it is possible to stably hold the occupant support member 3 at the attachment position in the frame body 10.

  In particular, in the present embodiment, as described above, when the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged with each other, the tongue-like projections 23 and 33 formed on each sandwiching portion 21 and 31 are in the width direction. It will be arrange | positioned in the position which adjoins and mutually opposes. That is, in this embodiment, the two tongue-like protrusions 23 and 33 are arranged in a state where they overlap in the width direction. Thus, since the tongue-like protrusions 23 and 33 as the movement restricting portions are arranged in a double manner, the occupant support member 3 is positioned in the width direction from the position where the occupant support member 3 is sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31. It is possible to more effectively regulate the inward movement.

  Furthermore, in the present embodiment, as described above, the tongue-like projections 23 formed on the front sandwiching portion 21 in the state where the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged with each other, the front projection 22 It extends from the rear end of the rear side convex portion 32 to the rear side. Further, a tongue-like projection 33 formed on the rear sandwiching portion 31 extends from the front end of the rear convex portion 32 and extends further forward than the rear end of the front convex portion 22. With such a configuration, the occupant support member 3 is disposed at a position sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31 while being restricted by the tongue-like protrusions 23 and 33 serving as movement restricting portions. As a result, in this embodiment, the attachment state of the occupant support member 3 with respect to the frame body 10 is stably maintained.

  Further, in the present embodiment, as shown in FIG. 13, the tongue-like protrusion 33 formed on the rear sandwiching portion 31 is in the front side when the front sandwiching portion 21 and the rear sandwiching portion 31 are engaged. It is located on the inner side in the width direction than the tongue-like protrusion 23 formed in the sandwiching portion 21. By adopting such a positional relationship, in this embodiment, it is possible to secure a larger amount of sinking when a passenger sitting on the vehicle seat S sinks backward due to a rear impact load on the vehicle. It becomes.

  More specifically, the pinching portions 21, 31 are arranged so that the tongue-like protrusion 33 formed on the rear pinching portion 31 is positioned on the inner side in the width direction than the tongue-like protrusion 23 formed on the front pinching portion 21. When engaged, the front end position of the tongue-shaped projection 33 formed on the rear side pinching portion 31 is the front end position of the front side pinching portion 21 (specifically, as shown in FIG. The front side clip 21 is located behind the front surface 26). Therefore, a step of a distance l is formed between the front end of the front sandwiching portion 21 and the front end of the tongue-like protrusion 33 formed on the rear sandwiching portion 31. And the space which a passenger | crew sinks back comes to be expanded by the part of the said level | step difference. As a result, it is possible to secure a larger amount of occupant sinking.

  Furthermore, in this embodiment, in a state where the occupant support member 3 is attached to the frame body 10, the upper and lower ends of the tongue-like protrusions 23 and 33 formed on each of the front sandwiching portion 21 and the rear sandwiching portion 31 are The occupant support member 3 is positioned between the upper end and the lower end in the vertical direction. Here, as described above, the upper end of the occupant support member 3 is the upper end position where the occupant support member 3 snakes up and down, and similarly, the lower end of the occupant support member 3 is the occupant support. It is the lower end position where the member 3 meanders and reaches. In such a positional relationship, the tongue-like projections 23 and 33 as the movement restricting portions are within the range where the occupant support member exists in the vertical direction. Thereby, in this embodiment, it becomes possible to suppress the enlargement of the seat back frame 1 in the up-down direction more effectively.

  The embodiments described above are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the shape, dimensions, arrangement, and the like of each part of the seat back frame 1 according to the above-described embodiment can be changed and improved without departing from the spirit of the present invention, and the present invention includes equivalents thereof. Of course.

  In the above-described embodiment, the tongue-like protrusions 23 and 33 as the movement restricting portions are formed in each of the front sandwiching portion 21 and the rear sandwiching portion 31. However, the present invention is not limited to this. . It is only necessary that the movement restricting portion is formed in at least one of the front sandwiching portion 21 and the rear sandwiching portion 31. That is, the movement restricting portion may be formed only in the front side pinching portion 21 or only in the rear side pinching portion 31. However, from the viewpoint of more effectively regulating the movement of the occupant support member 3 from the position sandwiched between the front sandwiching portion 21 and the rear sandwiching portion 31 to the inner side in the width direction, the front sandwiching portion 21 and the rear side It is desirable that a movement restricting portion is formed in each of the sandwiching portions 31.

  Moreover, in said embodiment, each of the front side convex part 22 which the front side clamping part 21 has, and the rear side convex part 32 which the rear side clamping part 31 has on the top surfaces 24 and 34 and the top surfaces 24 and 34, respectively. It has three adjacent surfaces adjacent to each other. In the above embodiment, the adjacent surfaces of each of the front sandwiching portion 21 and the rear sandwiching portion 31 are both inclined surfaces. However, the present invention is not limited to this, and only the upper surfaces 25 and 35 of the three adjacent surfaces may be inclined surfaces. Furthermore, the upper surfaces 25 and 35 which at least one has among the front side convex part 22 and the rear side convex part 32 should just be an inclined surface. That is, only the upper surface 25 of the front convex portion 22 or only the upper surface 35 of the rear convex portion 32 may be inclined.

  In the above embodiment, the occupant support member 3 made up of a spring meandering in the vertical direction has been described. However, as a member constituting the occupant support member 3, an occupant seated on the vehicle seat S sinks backward. Other members may be used as long as they are members that can be deformed so that, for example, a plate-like elastic body having a width in the vertical direction may constitute the occupant support member 3.

  In the above-described embodiment, the portion of the frame body 10 that sandwiches the occupant support member 3 is formed in the side frame 12. In particular, in this embodiment, from the viewpoint of suppressing an increase in the size of the seat back frame 1, a portion for sandwiching the occupant support member 3 inside the side frame 12 in the width direction, that is, a front sandwiching portion 21 and a rear sandwiching portion 31 are provided. It was decided. However, the present invention is not limited to this, and a portion for sandwiching the occupant support member 3 may be provided outside the side frame 12 in the width direction. Moreover, it is good also as a site | part which clamps the passenger | crew support member 3 in parts other than the side frame 12, among the frame main bodies 10, for example, the upper frame 11 or the lower frame 13.

S Vehicle Seat S1 Seat Back, S2 Seat Cushion, S3 Headrest HP Headrest Pillar RH Hole D Clearance, Dr Adjacent Hole 1 Seatback Frame 2 Seat Cushion Frame 3 Occupant Support Member 10 Frame Main Body 11 Upper Frame, 12 Side Frame, 13 Lower Frame 14 Front frame piece 14b Inner surface, 14h Holding part 15 Rear frame piece 15a Outer edge wall, 15b Inner edge wall, 15h Holding part 21 Front side clamping part 22 Front convex part 23 Tongue-like projection (movement restricting part)
24 Top surface 25 Upper surface, 26 Front surface, 27 Lower surface 31 Rear side pinching portion 32 Rear side convex portion 33 Tongue protrusion (movement restricting portion)
34 Top surface 35 Upper surface, 36 Rear surface, 37 Lower surface

Claims (12)

A seat back frame provided in a vehicle seat on which an occupant is seated,
A frame body formed by combining a front frame piece made of a resin material and a rear frame piece made of a resin material;
An occupant support member disposed between both ends of the frame main body in the width direction of the vehicle seat and supporting an occupant seated on the vehicle seat from the back side;
The front frame part formed on the front frame piece and the rear clip part formed on the rear frame piece engage with each other, thereby forming the frame body.
The seat back frame, wherein the occupant support member is attached to the frame main body by being sandwiched between the front side sandwiching portion and the rear side sandwiching portion.   A movement restricting portion that restricts movement of the occupant support member from the position where the occupant support member is sandwiched between the front side sandwiching portion and the rear side sandwiching portion to the inside in the width direction includes the front side sandwiching portion and the rear side sandwiching portion. The seat back frame according to claim 1, wherein the seat back frame is formed on at least one of the two.   The seat back frame according to claim 2, wherein the movement restricting portion is formed in each of the front side pinching portion and the rear side pinching portion.   In a state where the front side clip part and the rear side clip part are engaged with each other, the movement restriction part formed on the front side clip part and the movement restriction part formed on the rear side clip part are The seat back frame according to claim 3, wherein the seat back frame is disposed adjacent to each other in the width direction and facing each other.   In a state where the front side pinch part and the rear side pinch part are engaged with each other, the movement restriction part formed on the rear side pinch part is more than the movement restriction part formed on the front side pinch part. The seat back frame according to claim 4, wherein the seat back frame is inside in the width direction. The front side sandwiching portion has a front convex portion that is formed to protrude inward in the width direction from an end portion of the front frame piece in the width direction,
The said back side clamping part has the rear side convex part formed so that it might protrude in the inside of the said width direction from the edge part of the said back side frame piece in the said width direction. The seat back frame according to one item.   The said front side convex part protrudes from the area | region located in the rear end side in the front-back direction of the said vehicle seat among the edge parts of the said front side frame piece in the said width direction. Seat back frame. Each of the front side convex portion and the rear side convex portion has a top surface located on the innermost side in the width direction, and three adjacent surfaces adjacent to the top surface,
Of the three adjacent surfaces of at least one of the front-side convex portion and the rear-side convex portion, the uppermost surface located on the uppermost side is an inclined surface that is located downward as it approaches the top surface. The seat back frame according to claim 6 or 7. Each of the front-side sandwiching part and the rear-side sandwiching part restricts movement of the occupant support member from the position sandwiched between the front-side sandwiching part and the rear-side sandwiching part to the inside in the width direction. A movement restriction part is formed,
In a state where the front side sandwiching portion and the rear side sandwiching portion are engaged with each other, the movement restricting portion formed on the front side sandwiching portion extends from the rear end of the front convex portion and the rear convex portion The movement restricting portion formed at the rear-side sandwiching portion extends from the front end of the rear-side convex portion and extends further forward than the rear end of the front-side convex portion. The seat back frame according to any one of claims 6 to 8, wherein the seat back frame is provided. Each of the front convex portion and the rear convex portion has a top surface located on the innermost side in the width direction,
An upper end and a lower end of the movement restricting portion formed in the front side sandwiching portion are positioned between an upper end and a lower end of the top surface of the front convex portion in the vertical direction, and are formed in the rear side sandwiching portion. 10. The seat back frame according to claim 9, wherein an upper end and a lower end of the movement restricting portion are positioned between an upper end and a lower end of the top surface of the rear convex portion in the vertical direction. In a state where the front side clip part and the rear side clip part are engaged with each other, the movement restriction part formed on the front side clip part and the movement restriction part formed on the rear side clip part are Arranged adjacent to each other in the width direction and facing each other,
The occupant support member extends along the width direction while meandering in the vertical direction,
An upper end and a lower end of the movement restricting portion formed in each of the front side sandwiching portion and the rear side sandwiching portion are located between an upper end position and a lower end position where the occupant support member meanders and reaches in the vertical direction. The seat back frame according to claim 9 or 10, wherein the seat back frame is provided. In a state where the front convex portion and the rear convex portion are engaged with each other, a gap is formed between the front convex portion and the rear convex portion,
By inserting the end portion of the occupant support member in the width direction into the gap, the occupant support member is sandwiched between the front sandwiching portion and the rear sandwiching portion,
The opening on the side where the end of the occupant support member is provided in the gap is formed so as to be elongated along the width direction. The seat back frame according to one item.

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