JP2014080049A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which reduces the number of components and supports a head rest achieving high rigidity and high stability in a seat back frame formed by combining multiple frames.SOLUTION: A vehicle seat S, on which an occupant is seated, is formed including at least a seat back frame 1 which supports a rear part of the occupant. The seat back frame 1 includes at least a frame body 10 that is formed by combining a front frame 14 forming the front side and a rear frame 15 forming the rear side. Cylindrical support parts 14h for supporting a head rest S3 are formed at a combined portion of the front frame 14 and the rear frame 15. Each support part 14h has an opening for inserting a joint member for connecting the head rest S3 with the frame body 10.

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat with enhanced rigidity around a headrest.

In general, a vehicle seat is configured by disposing a cushion material on a frame serving as a skeleton and covering the cushion material with a skin material.
The frame that is a skeleton is generally composed of a seat cushion frame that is a skeleton of a seating portion, and a seat back frame that is a skeleton of a backrest, and a rear end portion of the seat cushion frame and a lower end portion of the seat back frame. Attached or constructed directly or indirectly (eg indirectly via a reclining mechanism).
In general, a headrest for holding the head of the occupant is attached above the seat back frame.

As described above, the headrest is usually attached above the seat back frame, and various techniques have been proposed as the attachment method.
In other words, since the headrest is for holding the head of the occupant, the headrest is required to have sufficient strength to withstand a sudden impact load and a large force applied to the rear.
Therefore, there is a background that various techniques for attaching a headrest to a seatback frame have been developed in order to satisfy such a requirement (see, for example, Patent Document 1).

Patent Document 1 discloses a technique related to a seat back frame.
The seat back frame of Patent Document 1 is formed by combining a front frame that constitutes a front portion and a rear frame that constitutes a rear portion.
A pillar support hole is formed in the upper part when the front frame and the rear frame are assembled. A cylindrical pillar support part is disposed in the pillar support hole, and the pillar support part is interposed through the pillar support part. The headrest pillar is mounted.
In another embodiment, the pillar support portion is fixedly formed on the upper portion of the front frame, and the headrest pillar is attached via the pillar support portion.

JP 2011-201456 A

The seat back frame disclosed in Patent Document 1 is formed by combining a front frame constituting a front portion and a rear frame constituting a rear portion. For this reason, with the sheet | seat which can improve the rigidity with respect to the impact of the front-back direction and the left-right direction (seat width direction), and can suppress damage to interior materials, such as a cushion material and a skin material, and can hold | maintain a sheet | seat shape However, further improvement has been demanded for such a seat back frame.
In other words, in the seat back frame constituted by such a plurality of frames, a further contrivance for attaching the headrest is required. In other words, high rigidity and stable support are achieved while suppressing an increase in the number of parts. There was a need for further improvements to achieve this.

  An object of the present invention is to provide a vehicle seat capable of supporting a headrest with high rigidity and high stability while suppressing the number of parts, particularly in a seat back frame formed by combining a plurality of frames. It is to provide.

According to the vehicle seat of the present invention, the subject is a vehicle seat on which an occupant is seated,
The vehicle seat is configured to include at least a seat back frame that supports a back portion of an occupant, and the seat back frame is formed by combining a front frame that configures the front and a rear frame that configures the rear. A frame main body is provided, and a cylindrical support portion for supporting a headrest is formed at a joint portion between the front frame and the rear frame, and the support portion includes the headrest and the frame main body. This is solved by having an opening for inserting a joining member for connecting the two.

Thus, the vehicle seat according to the present invention includes a frame main body formed by combining a plurality of frames (a front frame and a rear frame), and this is a large component of the seat back frame.
And in this invention, the cylindrical support part for supporting a headrest is formed in the joint part of a front frame and a rear frame, and the joining member for connecting a frame main body and a headrest to this support part Is provided with an opening.
As described above, according to the present invention, the support member is not formed as a separate member, but the support member is formed at the mating portion of the front frame and the rear frame, thereby suppressing an increase in the number of parts. And stable support of the headrest can be realized.

  In addition, although the support part is formed in the cylindrical shape, as the shape, for example, a space (cavity) is formed in the inner wall such as a substantially U-shaped cross section, a substantially arc-shaped cross section, or a substantially U-shaped cross section. Any shape that can hold the joining member in the (space) may be used, and the term “cylindrical” widely includes these concepts.

In addition, the support portion only needs to be formed in a cylindrical shape, and further, in such a shape, the space (hollow) shape (that is, the shape formed by the inner wall portion) is formed in a shape along the joining member. It is still more preferable.
If comprised in this way, a joining member can be hold | maintained (gripped) more effectively.

At this time, as in claim 2, it is preferable that the support portion is formed by bending one of the front frame and the rear frame.
If comprised in this way, it is only necessary to carry out a bending process only to one frame, Therefore A support part can be provided easily compared with the case where a bending shape is provided in both frames.

  Specifically, as in claim 3, it is preferable that the support portion be formed on the front side of the front frame because a space for moving (sinking) an occupant can be secured.

Furthermore, as in claim 4, it is preferable that a plurality of the support portions are formed, and a convex portion protruding forward or rearward is formed between the plurality of support portions.
With this configuration, the rigidity around the support portion is improved.
That is, since it is formed integrally, reinforcement by another member or the like is unnecessary, and higher rigidity can be secured while suppressing an increase in size.

Further, at this time, as in claim 5, it is preferable that the front side end portion of the convex portion is configured to be located behind the front side end portion of the support portion.
If comprised in this way, the discomfort to a passenger | crew by providing a convex part can be prevented.

  Further, according to claim 6, the frame main body includes a side frame portion spaced apart from the left and right, a lower frame portion that bridges the lower end portions of the side frame, and an upper end portion of the side frame. The upper frame part that bridges each other is formed into a frame shape, the support part is formed on the upper frame part, and the support part is formed on the front frame and the rear frame. It is preferable that the other frame, which is different from the frame on the other side, is formed with a flange portion at a position close to the support portion in the assembled state.

As described above, since the flange portion is provided, the rigidity of the frame can be improved.
And since a support part can be comprised in the flame | frame with which higher rigidity was ensured, the stability of headrest support can be made higher.

In this case, specifically, as in claim 7, the flange main body is assembled with the frame main body, and the joining member for connecting the headrest and the frame main body is arranged on the support. In the installed state, it is preferable to be disposed at a position that does not interfere with the joining member.
More specifically, as in claim 8, it is preferable that the flange portion is formed below the joining member.
Such a configuration is preferable because the contact between the joining member and the flange can be effectively suppressed.

  Furthermore, as in claim 9, in the state where the joint is disposed on the support, the frame on the side where the support is formed is below the interference portion between the support and the joint. It is preferable that a notch is formed in the case because a further weight reduction can be realized.

  In addition, as described in claim 10, it is preferable that an adhesive surface to which an adhesive is applied is formed on the surface disposed in the vehicle width direction of the support portion, since the mounting rigidity of the support portion can be secured. It is.

According to the first aspect of the present invention, since the support portion is not formed as a separate member, but the cylindrical support member is formed at the joining portion of the front frame and the rear frame, the increase in the number of parts is suppressed. And stable support of the headrest can be realized.
According to invention of Claim 2, a support part can be provided easily.
According to the invention of claim 3, it is possible to secure an occupant movement (sinking) space. According to the invention of claim 4, it is possible to secure higher rigidity while suppressing an increase in size.
According to the invention of claim 5, it is possible to suppress a sense of discomfort to the occupant due to the provision of the convex portion, and the riding performance is improved.
According to the invention of claim 6, since the support portion with higher rigidity is secured and the flange is provided in the periphery, the stability of the headrest support can be further increased. Contact with the flange can be effectively suppressed.
According to invention of Claim 8, since the flange was formed below, it becomes possible to shift the position of a flange. For this reason, it becomes possible to enlarge a flange and to ensure high rigidity.
According to invention of Claim 9, weight reduction is realizable.
According to the invention of claim 10, the mounting rigidity of the support portion can be ensured.

1 is a schematic perspective view of a vehicle seat according to an embodiment of the present invention. 1 is a schematic perspective view of a seat back frame according to an embodiment of the present invention. It is a front view of the seat back frame concerning one embodiment of the present invention. It is a back view of the seat back frame concerning one embodiment of the present invention. It is a principal part enlarged front view of the seat back frame which concerns on one Embodiment of this invention. It is a principal part expansion perspective view of the seat back frame which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the headrest guide member which concerns on one Embodiment of this invention. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is explanatory drawing which shows the headrest guide member which concerns on one Embodiment of this invention. It is explanatory drawing which shows the headrest guide member which concerns on one Embodiment of this invention. It is explanatory drawing of the flange part formed in the seat back frame which concerns on one Embodiment of this invention. It is explanatory drawing which shows the headrest guide member periphery which concerns on other embodiment of this invention.

Hereinafter, a vehicle seat according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS.
1 is a schematic explanatory view of a vehicle seat, FIG. 2 is a schematic perspective view of a seat back frame, FIG. 3 is a front view of the seat back frame, FIG. 4 is a rear view of the seat back frame, and FIG. 6 is an enlarged perspective view of the main part of the seat back frame, FIG. 7 is a longitudinal sectional view of the headrest guide member, FIG. 8 is a sectional view taken along line AA of FIG. 3, and FIGS. 9 and 10 are headrest guides. Explanatory drawing which shows a member, FIG. 11 is explanatory drawing of the flange part formed in the seat back frame.
FIG. 12 is an explanatory view showing another embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, members, arrangements, and the like described below are not intended to limit the present invention, and various modifications may be made in accordance with the spirit of the present invention. Of course you can. In this specification, a vehicle means a vehicle for traveling on which a seat can be mounted, such as a vehicle for traveling on the ground having wheels such as an automobile or a railroad, an aircraft or a ship moving on the ground, and the like.

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.

<< Basic configuration of vehicle seat S >>
With reference to FIG. 1 thru | or FIG. 11, the vehicle seat S which concerns on embodiment is demonstrated.
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.

  As described above, the vehicle seat S according to this embodiment includes the seat back S1 (back), the seat cushion S2, and the headrest S3. The seat back S1 (back) and the seat cushion S2 are not attached to the seat frame F. The illustrated cushion pad is placed and covered with a skin material.

  The headrest S3 is formed by disposing a cushion pad material (not shown) on a core material (not shown) of the head and covering it with a skin material. Reference numeral HP denotes a headrest pillar that supports the headrest S3.

  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 as main components. ing.

A known seat cushion frame is used as the seat cushion frame 2 according to the present embodiment.
For example, the seat cushion frame 2 is formed so as to form a rectangular frame body in plan view, and particularly in the present embodiment, it is integrally formed of carbon fiber reinforced plastic (CFRP) as a resin material. Good.

  The seat cushion frame 2 is supported by a leg portion, and for example, an inner rail is attached to the leg portion, and the seat cushion frame 2 is assembled in a slide type that can be adjusted in the front-rear position with an outer rail installed on the vehicle body floor. It has been.

The rear end portion of the seat cushion frame 2 is connected to the seat back frame 1 through, for example, a reclining mechanism.
In the case of using a reclining mechanism, a known mechanism may be employed.
In addition, about the seat cushion frame 2 and the reclining mechanism, what is necessary is just to use a well-known thing, and since it is not directly related to the content of this application, detailed description is abbreviate | omitted.

Next, as shown in FIGS. 2 and 3, the seat back frame 1 according to the present embodiment includes a frame body 10 that forms a rectangular frame when viewed from the front, and a spring meandering in an S shape (so-called S spring). And an occupant support member 3.
The frame body 10 includes an upper frame 11 formed in a substantially trapezoidal shape, side frames 12 formed as a pair in a state of being separated from each other in the width direction, and a lower frame 13 connecting the lower ends of the side frames 12 to each other. And as above-mentioned, it forms as a substantially rectangular frame in front view.

And the frame main body 10 which concerns on this embodiment is divided | segmented into two front and back, and is comprised.
That is, the frame main body 10 is formed by combining the front frame 14 constituting the front part and the rear frame 15 constituting the rear part.
In the present embodiment, both the front frame 14 and the rear frame 15 are made of CFRP as a resin material, and are integrally formed by molding.
The material of the front frame 14 and the rear frame 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 front frame 14 and the rear frame 15 is not limited to the case where CFRP is put into the mold and integrally molded, and a method other than mold molding, for example, a sheet made of a resin material is formed into a frame shape. The front frame 14 and the rear frame 15 may be formed by laminating according to the above.

Each of the two front frames 14 and the rear frame 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 front frame 14 and the rear frame 15 are combined with each other in the front frame 14 and the rear frame 15.

  Similarly, the portion corresponding to the side frame 12 is a portion constituting the side frame 12 when the front frame 14 and the rear frame 15 are combined in the front frame 14 and the rear frame 15. Further, the portion corresponding to the lower frame 13 is a portion constituting the lower frame 13 when the front frame 14 and the rear frame 15 are combined.

When the front frame 14 and the rear frame 15 are combined with each other, a hollow frame body 10 is formed. More specifically, for example, the cross-section when cut along the horizontal plane of the side frame 12 is a closed cross-sectional structure. It becomes.
The frame main body 10 (the front frame 14 and the rear frame 15) is a main component of the present invention and will be described in detail later.

The occupant support member 3 is attached to the frame body 10 in a state of extending in the width direction while meandering in the vertical direction.
In particular, in this 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.

<< About the structure of the frame body >>
Next, the frame body 10 will be described in detail.
As described above, the frame body 10 is formed by combining the front frame 14 and the rear frame 15.
Note that FIG. 3 is a front view of the seat back frame 1 and shows the front frame 14 as a hooked portion so that it can be easily distinguished. However, such a pattern or processing is not performed, Processing is optional.

First, the front frame 14 will be described.
In the front frame 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.
A portion of the front frame 14 corresponding to the side frame 12 is provided with a front side clip portion 21 formed on the inner surface of the portion.
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 the present embodiment, two front side clip portions 21 are formed on the side corresponding to one side frame 12 so as to be spaced apart in the vertical direction (a total of four are formed on both sides). The sandwiching portions 21 and 21 are connected by a flange portion formed in a portion corresponding to the side frame 12.

As shown in FIGS. 2, 3, 5, 6, and the like, in the present embodiment, a part of the front frame 14 corresponding to the upper frame 11 extends in the vertical direction. In this portion, two front side holding portions 14h, 14h for holding the headrest pillar HP are formed.
As shown in FIGS. 6 and 8, the front side holding portion 14 h is formed so as to protrude forward. When the front side holding portion 14 h is combined with the rear frame 15, the front side holding portion 14 h And it becomes a cylinder shape (transverse cross-section substantially rectangular cylinder shape), and it is comprised so that the inner hole may be extended in an up-down direction.

Further, as shown in FIGS. 6, 9 and 10, the front side holding portion 14h is formed with a front side engagement hole portion 141a.
For convenience of explanation, the substantially U-shaped bottom surface of the front side holding portion 14h is referred to as “front side bottom surface portion 140”, and the surface facing inward (the surface facing inside on both front side holding portions 14h and 14h) is referred to as “front side. The inner side surface 141 "and the surface facing outward are referred to as" front side outer surface 142 ".
The front side engagement hole 141a is formed on the front side inner surface 141.

In the present embodiment, the front-side engagement hole portion 141a is formed as a substantially rectangular hole that is notched downward from the upper end side of the front-side inner side surface 141.
The front side engagement hole 141a communicates with a rear side engagement hole 151a, which will be described later, and an engagement projection G21 formed on the headrest guide member G is engaged with the communication hole.

Further, as shown in FIGS. 3 and 5, the lower side of the front side holding portions 14h and 14h is notched, and notched portions 14k and 14k are formed.
This can realize further weight reduction.
Further, all or part of the front side inner surface 141 and the front side outer surface 142 function as an adhesive surface to which an adhesive is applied.
For this reason, the attachment rigidity of the front side holding part 14h can be ensured, and the support stability of the headrest is further enhanced.

Further, in the present embodiment, the two front side holding portions 14h, 14h are formed separately in the left-right width direction at both ends of the portion corresponding to the upper frame 11 of the front frame 14, Between these two front side holding portions 14h, 14h, a convex portion 14i protruding forward is formed.
As shown in FIG. 3, FIG. 5, FIG. 6, FIG. 8, and the like, this convex portion 14i is formed to project so as to have a substantially U-shaped cross section (that is, a cup shape having a substantially rectangular bottom surface). Has been.
Thus, by forming the convex portion 14i, it is possible to ensure rigidity without increasing the size.

At this time, the protruding distance of the convex portion 14i (the distance from the flat surface of the front frame 14 to the maximum protruding portion) is the protruding distance of the front side holding portion 14h (the distance from the flat surface of the front frame 14 to the maximum protruding portion). ) (See FIG. 6 and FIG. 8 in particular).
That is, the front end of the convex portion 14i is configured to be located behind the front end of the front side holding portion 14h.
For this reason, the discomfort to the passenger | crew by having formed the convex part 14i can be suppressed.
Further, in the present embodiment, the rear frame 15 is configured so that the position aligned with the convex portion 14i is flat.
If comprised in this way, the said part will become a box shape and can ensure high rigidity.
However, the present invention is not limited to this, and the rear frame 15 may be formed so that the position aligned with the convex portion 14i follows the shape of the portion.

The shape, size, and number of formed protrusions 14i are not limited to the above, and can be variously arranged.
For example, you may extend this convex part 14i to the size which connects between the front side holding | maintenance parts 14h and 14h.
If comprised in this way, rigidity will improve further and the support stability of a headrest will further increase.

Furthermore, you may extend this convex part 14i so that between the lower end part of front side holding | maintenance part 14h and 14h, and / or between upper end parts may be connected.
If comprised in this way, the height rigidity of the pillar contact part of the front side holding | maintenance parts 14h and 14h can be improved, and the support stability of a headrest will further increase.

Next, the rear frame 15 will be described with reference to FIG.
In the rear frame 15, 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 to the rear side.
More specifically, in the rear frame 15, an outer edge wall 15a formed along the outer edge and an inner edge wall 15b formed along the inner edge protrude forward.

  As shown in FIG. 3, a part of the rear frame 15 corresponding to the upper frame 11 extends upward and cooperates with the front side holding portions 14 h and 14 h of the front frame 14. Thus, two rear side holding portions 15h and 15h for holding the headrest pillar HP (headrest guide member G) are formed.

Further, as shown in FIG. 3, the outer edge of the rear frame 15 is slightly larger than the outer edge of the front frame 14, while the inner edge of the rear frame 15 is slightly smaller than the inner edge of the front frame 14. Yes.
The rear frame 15 is formed with a recess between the outer edge wall 15a and the inner edge wall 15b described above, and the rear end portion of the front frame 14 is fitted into the recess.

In this way, the front frame 14 is fitted into the recess formed in the rear frame 15, and the front frame 14 and the rear frame 15 are combined to form the frame body 10.
In addition, the front frame 14 and the rear frame 15 after being combined are preferably joined to each other using an adhesive or the like in order to maintain the combined state.

Further, a portion corresponding to the side frame 12 of the rear frame 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 to be engageable with the front sandwiching portion 21 of the front frame 14 and holds the end portion of the occupant support member 3 in cooperation with the front sandwiching portion 21.
In the present embodiment, two rear sandwiching portions 31 are formed on the side corresponding to one side frame 12 so as to be spaced apart in the vertical direction (a total of four are formed on both sides). The rear sandwiching portions 31, 31 are connected by a flange portion formed at a portion corresponding to the side frame 12.

Next, the two front side holding portions 14h and 14h, the two rear side holding portions 15h and 15h, and the periphery thereof will be described in detail.
As described above, as shown in FIGS. 3, 6, 8, etc., the front side holding portion 14 h is formed on the front frame 14 so as to protrude forward, and the upper end of the portion corresponding to the upper frame 11. It is formed so as to protrude upward from the side.
That is, as shown in FIG. 8 which has a cross section taken along the line AA in FIG. 3, the front side holding portion 14h is formed in a substantially U-shaped cross section (that is, a rectangular bottom cup shape).

  For convenience of explanation, the upward projecting portion of the front side holding portion 14h (the portion projecting upward from the upper end side of the portion corresponding to the upper frame 11 of the front frame 14) is referred to as “front side holding portion upper 14h1”. A portion of the front frame 14 corresponding to the upper frame 11 so as to project (toward the front) is referred to as a “front side holding portion lower portion 14h2” (particularly, refer to FIG. 5).

The rear side holding portion 15 h protrudes upward from the upper end side of the portion corresponding to the upper frame 11 in the rear frame 15.
When the front frame 14 and the rear frame 15 are combined, the formation position is configured to be a position (a rear surface of the front side holding portion 14h) that is aligned with a position where the front side holding portion 14h is disposed. Yes.

As shown in FIGS. 5, 6, 9, and 10, the rear side holding portion 15 h is formed in a substantially U-shaped cross section, and the front side holding portion upper portion 14 h 1 is fitted inside the rear side holding portion 15 h. It is configured as follows.
That is, the rear-side holding portion 15h has both the substantially U-shaped side wall on both sides of the outer wall portion of the substantially U-shaped side surface of the front-side holding portion upper portion 14h1, and the rear-side holding portion 14h (above the front-side holding portion above). 14h1) is fitted.
In other words, the opening portion of the front side holding portion upper portion 14h1 is closed by the substantially U-shaped bottom inner wall of the rear side holding portion 15h formed in the rear frame 15, and the front side holding portion lower portion 14h2 is It is blocked by a portion corresponding to the upper frame 11.

In this way, the front side holding portion 14h formed on the front frame 14 and the rear side holding portion 15h formed on the rear frame 15 (and the portion corresponding to the upper frame 11 of the rear frame 15) have a substantially rectangular cross section. A frame-shaped cylinder (hereinafter, this cylindrical part is referred to as “guide member mounting portion K”) is formed.
A headrest guide member G is inserted into the guide member mounting portion K.

Further, a rear side engaging hole 151a is formed in the rear side holding portion 15h.
For convenience of explanation, the rear side holding portion 15h has a substantially U-shaped bottom surface as "rear side bottom portion 150", and a surface facing inward (a surface facing inside on both rear side holding portions 15h and 15h) is referred to as "rear side". The inner side surface 151 ”and the surface facing outward are referred to as“ rear side outer surface 152 ”(see FIG. 6).

The rear side engagement hole 151 a is formed on the rear side inner surface 151.
In the present embodiment, the rear-side engagement hole portion 151a is formed as a substantially rectangular hole that is notched downward from the upper end side of the rear-side inner side surface 151.
The rear-side engagement hole 151a communicates with the front-side engagement hole 141a in a combined state, and an engagement projection G21 formed on the headrest guide member G is engaged with the communication hole. Is done.

Thus, in the present embodiment, the rear side holding portion 15h is sandwiched between both of the substantially U-shaped side walls and the outer side portion of the substantially U-shaped side surface of the upper side 14h1 of the front side holding portion. The holding part 14h (front side holding part upper part 14h1) is fitted.
Therefore, the portion where the rear side engagement hole 151a and the front side engagement hole 141a are formed has a double wall structure of the rear side inner side surface 151 and the front side inner side surface 141.
Therefore, the rigidity in the vicinity of the rear side engagement hole 151a and the front side engagement hole 141a can be ensured.

  However, the present invention is not limited to this. In short, it is only necessary that the opening can be closed by the rear side bottom surface portion 150, and the rear side inner side surface 151, the rear side outer side surface 152, etc. are not provided, or only one is provided. It may be configured to.

Here, the headrest guide member G will be briefly described.
FIG. 6 is a schematic view corresponding to a longitudinal section, and a structure not directly related to the present invention is omitted.
As shown in FIGS. 6 and 7, the headrest guide member G is configured to include a substantially prismatic head portion G1, a substantially prismatic frame fitted portion G2, and a neck portion G3 connecting these. ing.
A pillar shaft through hole G4 extending in the longitudinal direction is formed in the central portion.

In addition, an engagement protrusion G21 is formed at the upper end of the outer surface of the frame fitted portion G2 that faces inward when installed.
The engagement protrusion G21 is formed at a position that is aligned with the communication hole between the front side engagement hole 141a and the rear side engagement hole 151a when being arranged. Therefore, the headrest guide member G is guided to the guide member. When disposed in the attachment portion K, the engagement protrusion G21 is locked to the communication hole between the front side engagement hole 141a and the rear side engagement hole 151a.

In addition, if the opening peripheral wall in the height range of the vertical contact portion with the headrest pillar HP of the headrest guide member G is formed thick, the rigidity of the load input portion is improved, so that the support stability is further improved. Rise.
In addition, when the shape of the contact portion is a shape that follows the shape of the headrest pillar HP, it is possible to receive the load in a dispersed manner instead of receiving it at a point.

Furthermore, it is preferable that the opening peripheral wall of the headrest guide member G is configured such that the front-rear direction is thicker than the left-right direction.
With this configuration, the rigidity of the portion where the load from the headrest pillar HP is most easily transmitted is improved, so that the support stability is further increased.
Alternatively, the front side holding portion 14h and the headrest guide member G may be integrally formed to form an integral holding portion.
If comprised in this way, since it is not necessary to form the front side holding | maintenance part 14h and the headrest guide member G separately, the number of parts will be reduced and rigidity will also improve.

In the present embodiment, a rear frame hole 15i is formed in the rear frame 15 above the position corresponding to the hole RH and below the position corresponding to the upper frame 11 ( (Refer FIG.2, FIG.3, FIG.5, FIG.11 etc.).
The periphery of the rear frame 15 is bent toward the front side to form a flange portion 15j.

  With this configuration, the rigidity of the rear frame 15 (particularly, the vicinity of the rear frame hole 15j) is improved, and the guide mounting portions K and K are disposed on the rear frame 15 thus improved in rigidity. Therefore, the headrest S3 can be supported more stably.

Further, the flange portion 15j (particularly a portion formed upward) is formed at a position where it does not interfere with the headrest guide member G.
That is, the flange portion 15j is formed to be disposed below the lower end portion when the headrest guide member G is disposed.
Therefore, it is possible to effectively prevent the headrest guide member G and the flange portion 15j from interfering with each other.

Further, the flange portion 15j (particularly a portion formed upward) is formed between the guide member mounting portions K and K.
For this reason, since the rigidity between the guide member mounting portions K and K is improved and the guide mounting portions K and K are disposed on the rear frame 15 with further improved rigidity, the headrest S3 can be supported more stably. It becomes possible.

In this embodiment, the flange portion 15j is formed on the rear frame 15. However, the flange portion 15j is not limited to this. For example, the rear frame 15 has a configuration corresponding to the front side holding portion 14h, and the flange portion 15j is formed. A configuration corresponding to 15j may be formed on the front frame 14 side.
That is, it is possible to form a configuration corresponding to the flange portion 15j on a side different from the side where the configuration corresponding to the front side holding portion 14h is formed.

Further, a flange that bends forward and protrudes from the upper side of the hole RH is also provided to improve the rigidity. And the flange which protrudes ahead from this hole RH upper side protrudes ahead rather than the flange part 15j.
Further, flanges are also provided at positions corresponding to the upper portions of the side frames 12 and 12 of the front frame 14, and these flanges include a portion along the hole RH, a portion along the rear frame hole portion 15i, and these portions. It consists of connected parts.
And the upper end part of this flange is comprised so that it may extend toward the rear frame hole part 15i.
With this configuration, the rigidity around the hole RH and the rear frame hole 15i can be increased.

<< Other Embodiments >>
Another embodiment will be described with reference to FIG.
In the present embodiment, the guide member mounting portions K and K are connected.
That is, the guide member mounting portions K and K are bridged and connected by the lattice-shaped rib member Q.
Thereby, rigidity and strength can be further improved.
In addition, the shape of the member for this connection is not limited to this, What kind of shape may be used in the range which does not deviate from the meaning.

S vehicle seat S1 seat back, S2 seat cushion S3 headrest HP headrest pillar G headrest guide member (joining member)
G1 head G2 frame fitted portion G21 engagement protrusion G3 neck G4 pillar shaft through hole 1 seat back frame 10 frame body 11 upper frame, 12 side frame, 13 lower frame 14 front frame 14h front side holding portion (supporting portion) )
14h1 Front side holding part upper part
140 Front side bottom
141 Front side inner surface
141a Front side engagement hole
142 Front side outer surface 14h2 Front side holding part lower part 14i Protruding part 14k Notch part 21 Front side pinch part 15 Rear frame 15a Outer edge wall, 15b Inner edge wall 15h Rear side holding part (support part)
150 Rear side bottom
151 Rear side inner surface
151a Rear side engagement hole
152 Rear side outer surface 15i Rear frame hole portion 15j Flange portion 31 Rear side pinching portion K Guide member mounting portion Q Rib member RH Hole 2 Seat cushion frame 3 Crew support member

Claims (10)

A vehicle seat on which a passenger sits,
The vehicle seat is configured to include at least a seat back frame that supports the back of an occupant,
The seat back frame includes at least a frame main body formed by combining a front frame constituting the front and a rear frame constituting the rear,
A cylindrical support part for supporting the headrest is formed at the mating portion of the front frame and the rear frame,
The vehicle seat is characterized in that the support portion has an opening for inserting a joining member for connecting the headrest and the frame body.   The vehicle seat according to claim 1, wherein the support portion is formed by bending one of the front frame and the rear frame.   The said support part is a passenger | crew side of the said front frame, and is formed in the state which protruded to the passenger | crew side in the right-and-left both sides which avoided the center of this front frame, The Claim 1 or Claim 2 characterized by the above-mentioned. Vehicle seats.   The said support part is formed in multiple numbers, The convex part which protrudes in the front side or the back side is formed between the said several support parts, The Claim 1 thru | or 3 characterized by the above-mentioned. The vehicle seat described in 1.   The vehicle seat according to claim 4, wherein the front end portion of the convex portion is configured to be located rearward of the front end portion of the support portion. The frame main body portion includes a side frame portion that is spaced apart from the left and right, a lower frame portion that bridges the lower end portions of the side frame, and an upper frame portion that bridges the upper end portions of the side frames. It is configured in a frame shape,
The support part is formed on the upper frame part,
The other frame of the front frame and the rear frame, which is different from the frame on which the support portion is formed, is provided with a flange portion at a position facing the support portion in the vertical direction in the assembled state. The vehicle seat according to any one of claims 1 to 5, wherein the vehicle seat is provided. The flange portion is
In the state where the frame main body is assembled and the joining member for connecting the headrest and the frame main body is disposed in the support portion,
The vehicle seat according to claim 6, wherein the vehicle seat is disposed at a position not interfering with the joining member.   The vehicle seat according to claim 7, wherein the flange portion is formed below the joining member. In the state where the joint portion is disposed on the support portion,
The frame on the side on which the support portion is formed has a notch formed below an interference portion between the support portion and the joint portion. The vehicle seat according to one item.   10. The vehicle according to claim 1, wherein an adhesive surface to which an adhesive is applied is formed on a surface of the support portion disposed in the vehicle width direction. Sheet.

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