JP6651625B2 - Seat back frame and vehicle seat using the same - Google Patents

Description

  The present invention relates to a seat back frame and a vehicle seat used for a seat of a vehicle or the like, and more particularly to a seat back frame formed of a synthetic resin and a vehicle seat using the same.

  Generally, a seat back frame used for a seat of a vehicle represented by an automobile is mainly configured by a metal frame. And the headrest support member which supports a headrest is fixed to the metal frame in the rear part. By the way, recently, there has been a tendency to replace a metal seat back frame with a synthetic resin seat back frame for the purpose of reducing the weight of the seat. In this case, it is necessary to fix the headrest support member to the synthetic resin seat back frame. As a seat in which a headrest support member is fixed to such a synthetic resin seatback frame, for example, a seat described in JP-A-2015-674 (Patent Document 1) is known.

  In the seat described in Patent Literature 1, a pair of first support portions and a second support portion to which two stays of a headrest are attached to a seat back frame are integrally formed. A metal hollow bracket is provided on the first support portion and the second support portion, and a resin guide (also referred to as a headrest support) into which a metal stay of a headrest is inserted is fixed to the bracket. Then, by inserting the stay of the headrest into the resin guide, the headrest can be attached to the seat back frame.

  The resin guide fixed to the first support portion and the second support portion has a lock-side resin guide having a function of defining the height position of one stay of the headrest and a function of supporting the other stay of the headrest. The free-side resin guide has the following.

JP-A-2015-3674

  By the way, not only in Patent Document 1, but also in a synthetic resin seat back frame, two resin guides, into which a stay of a headrest is inserted, are used: a lock-side resin guide and a free-side resin guide. For this reason, there is a problem that the number of parts increases and the product cost rises.

  The lock-side resin guide and the free-side resin guide have similar external shapes but different internal structures. If the vehicle is erroneously assembled, there is a problem that the headrest cannot be held and comes off in the event of a collision, so that the head of the occupant cannot be protected or the height of the headrest cannot be adjusted.

  Then, in order to avoid erroneous assembly, it is necessary to carefully assemble the lock-side resin guide and the free-side resin guide. Further, since two pieces of the lock-side resin guide and the free-side resin guide are assembled, the number of working steps is increased. For this reason, there is a problem that it is difficult to improve work efficiency, and the product cost rises.

  Therefore, there is a strong demand in the field of this type of sheet to solve at least one of the above-mentioned problems.

  An object of the present invention is to provide a novel seat back frame that can solve at least one of the above-described problems, and a vehicle seat using the same.

  A feature of the present invention is that a seatback frame is formed of synthetic resin, a lock-side resin guide attaching portion for attaching a lock-side resin guide into which one stay of the headrest is inserted, and the other stay of the headrest. Is a seat back frame integrally formed with a stay guide portion to be inserted.

  Another feature of the present invention is that a lock-side resin guide is attached to a lock-side resin guide attachment portion formed integrally with a seat back frame, one of the stays of the headrest is inserted into the lock-side resin guide, and the seat back is A seat in which the other stay of the headrest is inserted into a stay guide portion formed integrally with the frame.

  According to the present invention, since the free resin guide can be omitted, at least one of the effects of reducing the number of parts, reducing the possibility of erroneous assembly, or improving the efficiency of assembly work can be achieved. Can be.

FIG. 2 is an exploded perspective view illustrating a configuration of a seat according to the embodiment of the present invention. FIG. 2 is a perspective view illustrating a configuration of a seat back frame illustrated in FIG. 1. FIG. 3 is an enlarged sectional view of a mounting portion of a lock-side resin guide of the seat back frame shown in FIG. 2. FIG. 3 is an enlarged sectional view of a mounting portion of a lock-side resin guide in a state where a cushion material is mounted on the seat back frame shown in FIG. FIG. 5 is an enlarged cross-sectional view of a mounting portion of a headrest and a lock-side resin guide in a state where the headrest is mounted on the seat back frame illustrated in FIG. 4. FIG. 3 is an enlarged sectional view of a stay guide portion of the seat back frame shown in FIG. 2. FIG. 7 is an enlarged sectional view of a stay guide portion in a state where a cushion material is attached to the seat back frame shown in FIG. FIG. 8 is an enlarged cross-sectional view of a mounting portion of a headrest and a stay guide portion in a state where the headrest is mounted on the seat back frame illustrated in FIG. 7. It is a perspective view showing composition of a seat back frame concerning other embodiments of the present invention. It is sectional drawing which shows the structure of the stay guide part of the seat back frame which becomes another embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Included in the range. In addition, the same reference numerals are given to the same elements, and duplicate description will be omitted. In addition, in the drawings, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified.

  FIG. 1 is an exploded perspective view showing the configuration of the seat according to the present embodiment, and FIG. 2 is a perspective view of the seat back frame shown in FIG. 1 and 2, the seat 1 includes, for example, a seatback frame 10, a headrest 11, a lock-side resin guide 12, a seat cover 13, a seat cover support 14, and the like.

  The seat back frame 10 constitutes a skeleton of, for example, an automobile seat back (backrest) and is molded of a synthetic resin. A thermoplastic resin is suitable as the synthetic resin, and for example, polypropylene can be used. The seat back frame 10 has, for example, an upper surface region 20, a side surface region 21, a reinforcement region 22, and a back region 23 as shown in FIGS. Each of these regions is integrally molded by a mold.

  The back region 23 is formed in a substantially square shape, is located on the back side of the seat back frame 10, and has openings 23a formed on the upper side and the lower side, for example.

  The upper surface region 20 extends from the upper portion of the rear region 23 to the front of the rear region 23. The upper surface area portion 20 is disposed horizontally, for example, in the left-right direction (width direction) of the sheet, and has one insertion hole 30 through which the lock-side resin guide 12 can be inserted from above. A stay guide portion 32 is formed adjacent to the insertion hole 30 integrally with the seat back frame 10. The insertion hole 30 and the stay guide portion 32 are provided at equal distances from the center of the seat to the left and right. Details of the stay guide portion 32 will be described later.

  As shown in FIGS. 1 and 2, the side surface region 21 extends from the left and right sides of the back region 23 to the front of the back region 23. The side surface region 21 is continuously connected from both left and right ends of the upper surface region 20, curves from the upper surface region 20, and then extends downward to a lower portion of the back surface region 23.

  The reinforcing region 22 has a slender, substantially rectangular shape, and extends from the back region 23 to the front as shown in FIGS. The reinforcement region 22 is disposed below the upper surface region 20 and is provided substantially horizontally in parallel with the upper surface region 20. The reinforcement region 22 has both ends connected to the left and right side surface regions 21 and has a bridging structure. The reinforcing region 22 has an engagement hole 31 for engaging and fixing the distal end of the lock-side resin guide 12 inserted from the insertion hole 30 of the upper surface region 20.

  Further, a stay guide main body portion 33 constituting the stay guide portion 32 is formed and arranged integrally with the reinforcement region portion 22 and the upper surface region portion 21 between the reinforcement region portion 22 and the upper surface region portion 21. .

  The upper surface area portion 20 has a flange portion 40 extending to the rear side. Inside the flange portion 40, a groove portion 41 (see FIG. 3) for inserting and fixing an edge portion of the seat cover 13 described later is formed. Similarly, the side surface region portion 21 has a flange portion 40 extending to the rear side as shown in FIGS. 1 and 2, and a groove portion 41 is formed inside the flange portion 40. Each of the flange portion 40 and the groove portion 41 of the upper surface region portion 20 and the flange portion 40 and the groove portion 41 of the side surface region portion 21 are formed continuously.

  As shown in FIG. 1, the seat cover 13 covers the front side of the seat back frame 10. As shown in FIG. 1, the seat cover support 14 is provided inside the front side of the seat back frame 10, and supports the seat cover 13 from the back side.

  The seat cover 13 has a thick seat pad 80 made of, for example, urethane, and a seat skin 81 covering the surface of the seat pad 80. For example, a fixture 82 (see FIG. 4) for fixing the seat cover 13 to the seat back frame 10 is provided on an outer peripheral edge of the seat skin 81. The seat cover 13 can be fixed to the seat back frame 10 by fitting the fixing tool 82 into the groove 41 inside the upper surface region 20 and the side surface region 21.

  Further, a through hole 83A for inserting the lock-side resin guide 12 is formed in an upper portion of the seat cover 13. The through-hole 83 </ b> A is formed at a position corresponding to the insertion hole 30 of the upper surface region 20 when the seat cover 13 is attached to the seatback frame 10. Similarly, a through hole 83 </ b> B for inserting the head of the stay guide portion 32 is formed in the upper portion of the seat cover 13. The through hole 83B is formed at a position corresponding to the portion where the stay guide portion 32 is disposed in the upper surface area portion 20 when the seat cover 13 is attached to the seat back frame 10.

  As shown in FIG. 2, the lock-side resin guide 12 having a function of supporting one of the two stays 11a of the headrest 11 has, for example, a cylindrical shape made of synthetic resin and has a large diameter. And a lock-side resin guide main body 61 (hereinafter referred to as a lock-side main body) having a smaller diameter than the lock-side head 60 and extending downward from the lock-side head 60. ). A through-hole 62 is formed in the center axis of the lock-side resin guide 12 so as to penetrate the lock-side head 60 and the lock-side main body 61 and into which the stay 11 a of the headrest 11 can be inserted.

  The head region of the stay guide portion 32 having a function of supporting the other of the two stays 11a of the headrest 11 is also formed in substantially the same shape as the lock-side resin guide 21 and has a large diameter stay guide head 34. (Hereinafter referred to as a stay side head) and a stay guide body 33 having a smaller diameter than the stay side head 34 and extending downward from the stay side head 34 (hereinafter referred to as a stay side body). have. In the vicinity of the center of the stay guide portion 32, a through hole 35 that penetrates the stay side head portion 34 and the stay side main body portion 33 and into which the stay 11a of the headrest 11 can be inserted is formed.

  Next, a detailed configuration of an attachment portion where the lock-side resin guide 12 is attached to the seat back frame 10 will be described with reference to FIGS. 3, 4, and 5. FIG.

  As shown in FIG. 3, a first locking portion 70 serving as a claw that can be locked in the engagement hole 31 is formed at a distal end portion of the lock-side main body portion 61. At least the vicinity of the distal end of the main body 61 has flexibility in the radial direction. The first locking portion 70 has an enlarged diameter portion 70a whose diameter gradually increases from the lower end to the upper side, and a step portion 70b formed at the end of the enlarged diameter portion 70a.

  When the lock-side resin guide 12 is inserted from the insertion hole 30 of the upper surface area portion 20, the enlarged diameter portion 70a of the first locking portion 70 hits the side wall of the engagement hole 31, and the enlarged diameter portion 70a bends inward. When the portion 70a further advances and passes through the engaging hole 31, the bending of the enlarged diameter portion 70a returns, and the step portion 70b is hooked on the side wall of the engaging hole 31. Thus, the first locking portion 70 is locked in the engagement hole 31. Further, the first locking portion 70 can be easily removed from the engagement hole 31 by bending the enlarged-diameter portion 70a inward and pulling the lock-side resin guide 12 upward.

  A second locking portion 71 that can be locked in the insertion hole 30 is provided at an upper portion of the lock-side main body portion 61. The second locking portion 71 is a step portion having a larger diameter than the insertion hole 30, and when the lock-side resin guide 12 is inserted into the insertion hole 30, the second locking portion 71 is hooked on the side wall of the insertion hole 30. The lock side resin guide 12 is not inserted any more. When the first locking portion 70 is locked in the engagement hole 31, the second locking portion 71 is locked in the insertion hole 30.

  Here, the insertion hole 30 formed in the upper surface region 20 and the engagement hole 31 formed in the reinforcement region 22 are provided with a lock-side resin guide mounting portion for mounting a lock-side resin guide into which one of the stays of the headrest is inserted. Has become. A space is formed between the upper surface region 20 and the reinforcing region 22. The lock-side resin guide 12 is inserted through the space, and an insertion hole 30 formed in the upper surface region 20 and a reinforcing region. The lock-side resin guide 12 is fixedly locked in an engagement hole 31 formed in the portion 22.

  When the second locking portion 71 is locked in the insertion hole 30 and the first locking portion 70 is locked in the engagement hole 31, the dimensions of the lock-side resin guide 12 are different from those of the upper surface region 20 and the head. It is set so that a space in which the seat cover 13 is interposed is formed between the seat cover 13 and the portion 60.

  In the seat configured as described above, the seat cover 13 is attached to the seat back frame 10 as shown in FIG. At this time, the fixture 82 is inserted into the groove 41, and the seat cover 13 is fixed to the seat back frame 10. The seat cover 13 covers the front side of the seat back frame 10, and the rear surface (the rear region 23) of the seat back frame 10 is exposed.

  The lock-side resin guide 12 is inserted from above the seat cover 13 into the through hole 83A of the seat cover 13, the insertion hole 30 of the upper surface region 20 of the seat back frame 10, and the engagement hole 31 of the reinforcing region 22. The first locking portion 70 at the tip of the side resin guide 12 is fixed to the engagement hole 31, and the second locking portion 71 is locked to the insertion hole 30.

  Next, as shown in FIG. 5, the stay 11 a of the headrest 11 is inserted into the through hole 62 of the lock-side resin guide 12, and the headrest 11 is fixed to the seat back frame 10. At this time, the stay 11 a of the headrest 11 is accommodated in front of the rear area 23 of the seat back frame 10 and is not exposed on the rear side of the rear area 23.

  According to the present embodiment, since the lock-side resin guide 12 is detachable from the seat back frame 10, the lock-side resin guide 12 can be easily replaced. Further, the upper surface region portion 20 extending from the upper portion of the rear region portion 23 to the front side, and the reinforcing region disposed below the upper surface region portion 20 and extending from the rear region portion 23 to the front side. The upper surface region 20 has an insertion hole 30 into which the lock-side resin guide 12 can be inserted from above, and the reinforcing region 22 has the lock-side resin guide 12 inserted through the insertion hole 30. Is configured to be freely fixable. According to this configuration, the lock-side resin guide 12 is attached to the front side of the rear area 23, and the stay 11a of the headrest 11 does not protrude behind the rear area 23. 10 only needs to be provided on the front surface, and as a result, the weight of the seat cover 13 can be reduced and the seat can be lightened. In addition, since the lock-side resin guide 12 is attached to the upper surface region 20 and the reinforcement region 22 extending from the rear surface region 23, the attachment strength between the headrest 11 and the seat back frame 10 can be sufficiently secured.

  Since the reinforcement region portion 22 is formed from the one left and right side surface region portion 21 to the other side surface region portion 21, it has a bridging structure, and the strength of the seat back frame 10 can be increased. Therefore, it is possible to suppress inward falling (a phenomenon in which the left and right side portions of the seat back frame are bent forward and inward) when an external force is applied to the seat toward the rear side.

  The upper surface region portion 20 and the side surface region portion 21 have a flange portion 40 extending to the rear side, and a groove portion 41 for inserting and fixing an edge of the seat cover 13 is formed inside the flange portion 40. ing. Thus, the seat cover 13 can be easily attached and detached with a simple configuration.

  Next, a detailed configuration of the stay guide portion 32 of the seat back frame 10 will be described with reference to FIGS. 6, 7, and 8. FIG.

  As shown in FIG. 6, the stay guide portion 32 includes a stay-side main body portion 33 that vertically connects the reinforcing region portion 22 and the upper surface region portion 20, an exposed main body portion 36 exposed from the upper surface region portion 20, and an integral part thereof. , Which are integrally formed of a synthetic resin forming the reinforcing region 22 and the upper surface region 20.

  The shape of the stay side head 34 and the exposed main body 36 projecting from the upper surface region 20 is substantially the same as the shape of the lock side head 60 projecting from the upper surface region 20 of the lock resin guide 12 shown in FIG. Is formed. Thus, the shape of the stay guide portion 32 and the lock-side resin guide 12 protruding from the upper surface region portion 20 are substantially the same in design.

  Therefore, the portion where the stay guide portion 32 protrudes from the upper surface region portion 20 has substantially the same shape as the portion where the conventional free-side resin lock protrudes from the upper surface region portion 20, so that the conventional seat cover 13 is diverted as it is. be able to. For this reason, by newly providing the stay guide portion 32, it is not necessary to largely change the shape of the seat cover 13, and it is possible to suppress an increase in product cost.

  Here, the shape of the stay guide portion 32 is designed so as to have substantially the same mechanical strength as the lock-side resin guide 12. For example, when the lock-side resin guide 12 is made of a material having a higher mechanical strength than the synthetic resin forming the seat back frame 10, the stay guide portion 32 of the stay guide portion 32 is adjusted in accordance with the mechanical strength of the lock-side resin guide 12. It is only necessary to determine the dimensions and the like.

  However, the shape of the exposed main body portion 36 exposed from the upper surface region portion 20 and the shape of the stay side head 34 integrated therewith project from the upper surface region portion 20 of the lock-side resin guide 12 in order to match the shape of the seat cover 13. Since it is formed in substantially the same shape as the lock-side head 60, mechanical strength should be ensured at least in the region of the stay-side main body 33. For example, since the through-hole 35 of the stay-side main body 33 has such a diameter that the stay 11a can be inserted, the thickness of the stay-side main body 33 is increased in order to secure the through-hole 35 and increase the mechanical strength. The mechanical strength can be increased by increasing the thickness.

  In the seat back frame 10 configured as described above, the seat cover 13 is attached to the seat back frame 10 as shown in FIG. In this case, the stay guide portion 32 is inserted into the through hole 83B of the seat cover 13 from below the seat cover 13 and locked. Here, if a through hole (not shown) through which the stay side head 34 of the stay guide portion 32 can be inserted and penetrated is formed in the seat cover 13, the stay side portion of the stay guide portion 32 is formed. After the portion 34 is passed through the through hole, the seat cover 13 is moved to a regular position, whereby the state shown in FIG. 7 can be obtained.

  After that, the fixing device 82 is inserted into the groove 41, and the seat cover 13 is fixed to the seat back frame 10. The seat cover 13 covers the front side of the seat back frame 10, and the rear area 23 of the seat back frame 10 is exposed.

  Next, as shown in FIG. 8, the stay 11a of the headrest 11 is inserted into the through hole 35 of the stay guide portion 32, and the headrest 11 is fixed to the seat back frame 10. At this time, the stay 11 a of the headrest 11 is accommodated in front of the back area 23 of the seat back frame 10 and is not exposed to the back of the back area 23.

  In this embodiment, after the seat cover 13 is first attached to the stay guide portion 32 of the seat back frame 10 to be in the state shown in FIG. 7, the lock-side resin guide 12 is inserted into the seat cover 13 and the seat back frame 10. The state shown in FIG.

  According to the present embodiment, the stay 11 a of the headrest 11 is inserted into the lock-side resin guide 12 and the stay guide portion 32, and in this case, only the lock-side resin guide is an attachment portion formed integrally with the seat back frame 10. It is configured to be attached to the insertion hole 30 and the engagement hole 31. For this reason, since the free side resin guide can be omitted, the number of parts can be reduced, and a rise in product cost can be suppressed.

  Alternatively, since the stay guide portion 32 is formed instead of the free-side resin guide and only the lock-side resin guide 12 is fixed to the seat back frame 10, erroneous assembling such that the lock-side resin guide 12 is not attached as in the related art is adopted. Since the headrest does not occur and is securely held, the headrest does not come off in the event of a collision, so that the head of the occupant can be protected and the height of the headrest can be adjusted reliably.

  Alternatively, since only the lock-side resin guide 12 is assembled to the seat back frame 10, the assembling work becomes extremely simple. Further, since only the lock-side resin guide is assembled, the operation step of attaching the free-side resin guide can be omitted. it can. For this reason, work efficiency can be improved and a rise in product cost can be suppressed.

  Of course, it is needless to say that all of the above-described functions and effects can be achieved. Further, it is needless to say that the operation and effect described in the above description of the lock-side resin guide 12 (the description of FIGS. 3, 4, and 5) are similarly exerted in the stay guide portion 32 side. Omitted.

  Note that the shapes and structures of the lock-side resin guide 12, the stay-side guide portion 32, the seat back frame 10, the headrest 11, the seat cover 13, and the like are not limited to those in the above-described embodiment. It may not reach the surface area 21, and the method of fixing the lock-side resin guide 12 and the reinforcing area 22 is not limited to the above-described embodiment.

  Further, it is also possible to form a reinforcing region such as a reinforcing rib for supporting the stay-side main body 33 between the reinforcing region 22 and the upper surface region 20. By adding such a reinforcing rib, the mechanical strength of the stay guide portion 32 can be further increased.

Next, some modifications of the stay guide portion 32 will be described. In the above-described embodiment, the configuration in which the exposed main body portion 36 and the stay-side head portion 34 are formed at positions protruding from the upper surface region portion 20 of the stay guide portion 32 has been described. Can be configured not to form
In FIG. 9, the stay guide portion 32 connects the reinforcing region portion 22 and the upper surface region portion 20 in the vertical direction. The stay side main body portion 33 is integrally formed of a synthetic resin forming the reinforcing region portion 22 and the upper surface region portion 20. Is formed. Unlike the above-described embodiment, the stay side head 34 and the exposed main body 36 protruding from the upper surface region 20 are not provided as shown in FIG. Therefore, the through-hole 35 is formed directly on the upper surface of the upper surface region 20.

  When formed in this manner, it is not necessary to form a through-hole through which the stay-side head 34 is inserted into the seat cover 13 as described above, so that product cost can be reduced. Since the operation becomes simple, the work efficiency can be improved.

  However, if the stay side head 34 and the exposed main body 3 are required with the headrest 11 attached, the stay side head 34 and the exposed main body 36 can be formed as separate pieces. When the stay 11a of the headrest 11 is inserted into the through hole 35, the stay 11a is attached with the piece of the stay side head 34 and the exposed main body 36, or the piece of the stay side head 34 and the exposed main body 36 is removed. The stay 11 a of the headrest 11 may be inserted into the through hole 35 in a state where the stay 11 is attached to the upper surface area 20.

  In the above-described embodiment, the shape of the stay guide portion 32 is designed so as to have substantially the same mechanical strength as the lock-side resin guide 12. For example, it has been proposed to secure the through-hole 35 of the stay-side main body 33 and then increase the thickness of the stay-side main body 33 to increase the mechanical strength in order to increase the mechanical strength. However, when the thickness of the stay-side main body portion 33 cannot be increased, or when it is desired to further increase the mechanical strength, the following configuration can be adopted as a method of increasing the mechanical strength of the stay guide portion 32.

  In FIG. 10, the stay guide portion 32 is made of a synthetic resin having higher mechanical strength than the synthetic resin forming the upper surface region 20 and the reinforcing region 22 of the seat back frame 10. Both ends of the stay guide portion 32 are formed in a flange shape, and are formed of an annular hollow body 37 through which the stay 11a of the headrest 11 is inserted. For example, if the seat back frame 10 is made of polypropylene (PP), the hollow body 37 forming the stay guide portion 32 has a higher mechanical strength than that of the polyphenylene sulfide resin (PPS) or the polycarbonate resin (PC). ) Etc. can be used. Thereby, the mechanical strength of the stay guide portion 32 can be increased. In this case, the seat back frame 10 having the configuration as shown in FIG. 10 can be obtained by placing the hollow body 37 constituting the stay guide portion 32 on the mold and performing insert molding.

  Further, instead of the hollow body 37 made of polyphenylene sulfide resin (PPS), polycarbonate resin (PC), or the like, a stay 11a of the headrest 11 made of a metal shown by a broken line, for example, an iron-based material is inserted. By mounting the hollow body 38 on a mold and performing insert molding, the seatback frame 10 having the configuration shown in FIG. 10 can be obtained. In this case, the synthetic resin for burying the hollow body 38 formed of an iron-based material is the same material as the synthetic resin forming the upper surface region 20 and the reinforcing region 22 of the seat back frame 10.

  Also, instead of the hollow bodies 37 and 38 of the stay guide portion 32, a seat back frame in which the mechanical strength near the stay guide portion 32 is improved by molding with a synthetic resin mixed with a strength enhancing material such as a carbon filler. 10 can be obtained.

  Of course, it is also possible to increase the thickness of the stay-side main body 33 and use the above-mentioned structural material for improving the additional mechanical strength.

  As described above, the present invention provides a seat back frame formed of a synthetic resin, a lock-side resin guide attachment portion for attaching a lock-side resin guide into which one of the stays of the headrest is inserted, and the other of the headrest. Is integrally formed with a stay guide portion into which the stay is inserted.

  In addition, a lock-side resin guide is attached to a lock-side resin guide mounting portion formed integrally with the seat back frame, one of the stays of the headrest is inserted into the lock-side resin guide, and a stay formed integrally with the seat back frame. The other stay of the headrest is inserted into the guide portion.

  According to this, since the free-side resin guide can be omitted, one or more effects of reducing the number of components, reducing the risk of erroneous assembly, or improving the efficiency of assembly work can be achieved. it can.

  Note that the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment. Also, for a part of the configuration of each embodiment, it is possible to add, delete, or replace another configuration.

  DESCRIPTION OF SYMBOLS 1 ... Seat, 10 ... Seat back frame, 11 ... Headrest, 12 ... Lock side resin guide, 13 ... Seat cover, 20 ... Top area part, 21 ... Side area part, 22 ... Reinforcement area part, 23 ... Back area part, Reference numeral 30 denotes an insertion hole, 31 denotes an engagement hole, 32 denotes a stay guide portion, 33 denotes a stay guide body portion, 34 denotes a stay guide head portion, 35 denotes a through hole, and 36 denotes an exposed body portion.

Claims (11)

A seat back frame including a pair of stay supporting portions for supporting two stays of a headrest,
A lock-side resin guide mounting portion for mounting the lock-side resin guide, which is the stay support portion, into which the one of the stays of the headrest is inserted, in which the seat back frame is formed of synthetic resin. A seat back frame, wherein a stay guide portion serving as the stay support portion into which the other stay of the headrest is inserted is formed integrally with the synthetic resin. The seat back frame according to claim 1,
The seat back frame includes a rear area, an upper area extending from an upper portion of the rear area to the front, and a lower area disposed below the upper area and extending from the rear area to the front. And a reinforcing area portion to be formed,
The lock-side resin guide mounting portion is formed by inserting the lock-side resin guide formed in the upper surface region from above into the insertion hole, and being inserted from the insertion hole of the upper surface region formed in the reinforcing region. It consists of an engagement hole for fixing the tip of the lock-side resin guide,
The stay guide portion is formed of the synthetic resin integrally with the reinforcing region portion and the upper surface region portion so as to connect between the reinforcing region portion and the upper surface region portion. seat back frame, characterized in but have a Sutegai de Main body portion formed with a through-hole to be inserted. The seat back frame according to claim 2,
The stay guide portion, the Sutegai de in the upper surface region of the side opposite to the side where the body portion is positioned, the lock-side substantially in the same shape as the resin guide head shape, the other of said stay of said headrest seat back frame but Sutegai de head portion in which a through hole is formed to be inserted, characterized in that it is formed integrally. The seat back frame according to claim 2,
Wherein the opposite side the upper surface area part surface of the Sutegai de side of the body portion is positioned, the seat back frame, wherein a through-hole and the other of the stay of the headrest is inserted. The seat back frame according to claim 2,
The seat back frame, wherein the stay guide portion has substantially the same mechanical strength as that of the lock-side resin guide. The seat back frame according to claim 5,
The synthetic resin forming the seat back frame is different from the synthetic resin forming the stay guide portion, and the mechanical strength of the synthetic resin forming the stay guide portion forms the seat back frame. A seat back frame having a mechanical strength greater than that of the synthetic resin. The seat back frame according to claim 5,
The stay guide portion is formed by the synthetic resin forming the seat back frame, and a metal hollow body through which the other stay of the headrest is inserted is embedded in the stay guide portion. Seat back frame. A vehicle seat comprising: a seatback frame including a pair of stay support portions that support two stays of a headrest; and a seat cover combined with the seatback frame,
A lock-side resin guide mounting portion for mounting the lock-side resin guide, which is the stay support portion, into which the one of the stays of the headrest is inserted, while the seat back frame is formed of a synthetic resin; A stay guide portion, which is the stay support portion into which the other stay of the headrest is inserted, is integrally formed of the synthetic resin,
The lock-side resin guide is attached to the lock-side resin guide attachment portion formed integrally with the seat back frame, and one of the stays of the headrest is inserted into the lock-side resin guide, and is integrated with the seat back frame. A vehicle seat, wherein the other stay of the headrest is inserted into the stay guide portion formed on the vehicle, and the headrest is fixed to the seatback frame. The vehicle seat according to claim 8,
The seat back frame includes a rear area, an upper area extending from an upper portion of the rear area to the front, and a lower area disposed below the upper area and extending from the rear area to the front. And a reinforcing area portion to be formed,
The lock-side resin guide mounting portion is formed by inserting the lock-side resin guide formed in the upper surface region from above into the insertion hole, and being inserted from the insertion hole of the upper surface region formed in the reinforcing region. It consists of an engagement hole for fixing the tip of the lock-side resin guide,
The stay guide portion is formed of the synthetic resin integrally with the reinforcing region portion and the upper surface region portion so as to connect between the reinforcing region portion and the upper surface region portion. vehicle seat but characterized by having a Sutegai de Main body portion formed with a through-hole to be inserted. The vehicle seat according to claim 9,
The stay guide portion, the Sutegai de in the upper surface region of the side opposite to the side where the body portion is positioned, the lock-side substantially in the same shape as the resin guide head shape, the other of said stay of said headrest vehicle seat but Sutegai de head portion in which a through hole is formed to be inserted, characterized in that it is formed integrally. The vehicle seat according to claim 9,
The Sutegai de on the surface of the top surface area portion opposite to the present side where the body portion is positioned, the vehicle seat, wherein a through-hole and the other of the stay of the headrest is inserted.

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