JP2016147543A - Vehicle seat, headrest support and headrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable adjustment of an angle of a headrest, a position in the cross direction, or the angle and the position in the cross direction, while suppressing complication and weight increase of a structure of vehicle seat.SOLUTION: A headrest support 9 is detachable with respect to a seat back (support bracket 11). Therefore, for example, by changing a mounting state of the headrest support 9, one state can be selected out of a first state in which an insertion port center is located on the rear side with respect to the support center, and a second state in which the insertion port center is located on the front side with respect to the support center. Thereby, the location of a headrest 7 in the cross direction can be changed. Also, for example, the headrest support can be replaced with the headrest support 9 in which the position of the insertion port center is different from that of the currently mounted headrest support 9. Even for this, the position of the headrest 7 in the cross direction can be changed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat provided with a headrest.

  Usually, the headrest is assembled to a headrest support fixedly attached to the seat back. The headrest support is provided with a stay insertion hole into which a pair of stay portions provided in the headrest are inserted so as to be freely moved in and out. And a seated person can displace a headrest only to an up-down direction by making a pair of stay part protrude and retract with respect to a stay insertion hole.

  For example, in the vehicle seat described in Patent Document 1, in addition to the above configuration, a mechanism (hereinafter referred to as a rotation mechanism) that allows the headrest to rotate around the horizontal axis is provided on the headrest and the headrest support. The headrest angle and the position in the front-rear direction can be adjusted.

JP 2001-233108 A

However, in the configuration described in Patent Document 1, since it is necessary to provide a rotation mechanism separately, the structure of the vehicle seat is complicated and the weight is increased.
An object of the present invention is to make it possible to adjust the angle of the headrest or the position in the front-rear direction while suppressing the complexity and weight increase of the structure of the vehicle seat.

  In the present application, a seat cushion (3) for supporting a seated person's buttocks, a seat back (5) for supporting the back of the seated person, and an upper end side of the seat back (5) for supporting the head of the seated person A headrest (7) and at least one stay portion (7A) provided on the headrest (7) and extending from the headrest (7) toward the seat back (5), the headrest (7) being attached to the seat back (5 ) And a cylindrical support tube portion (9B) provided with a stay insertion hole (9A) into which the stay portion (7A) is inserted so as to be freely moved in and out. The headrest support (9) includes a headrest support (9) that is detachably or detachably attached to the seat back (5).

  Thereby, in the invention which concerns on this application, a seated person etc. can displace a headrest support (9) with respect to a seat back (5), or (B) can replace a headrest support (9). Therefore, it is possible to adjust the angle of the headrest (7) or the position in the front-rear direction without separately providing a rotation mechanism.

  That is, for example, (A) a headrest support (9) in which the position of the stay insertion hole (9A) with respect to the seat back (5) differs depending on the position of the headrest support (9), and a seated person or the like uses the headrest support (9 ) Is displaced with respect to the seat back (5), the angle of the headrest (7) or the position in the front-rear direction can be changed.

  In the present application, (B) the position of the stay insertion hole (9A) with respect to the seat back (5) can be replaced with a headrest support (9) different from the current headrest support (9). That is, the seated person or the like can change the angle of the headrest (7) or the position in the front-rear direction by exchanging the headrest support (9).

As described above, in the invention according to the present application, the angle of the headrest (7) or the position in the front-rear direction can be changed while suppressing the complexity and weight increase of the structure of the vehicle seat.
The present invention may be configured as follows.

  That is, in the invention described in claim 2, the stay center line (L1) is inclined with respect to the cylinder center line (L2). Thereby, the angle of a headrest (7) or the position of the front-back direction can be changed.

  The stay center line (L1) is an imaginary line passing through the center of the stay insertion hole (9A) and parallel to the longitudinal direction of the support cylinder (9B). The cylinder center line (L2) is an imaginary line passing through the center of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part (9B) and parallel to the longitudinal direction of the support cylinder part (9B).

  In the invention described in claim 3, the center (O1) of the stay insertion hole (9A) is deviated from the center (O2) of the cross-sectional shape drawn by the outer peripheral surface of the support tube portion (9B). Thereby, the position of the headrest (7) in the front-rear direction can be changed.

  In the invention described in claim 4, the support bracket (11) provided on the seat back (5), which is provided with a support insertion hole (11 </ b> A) into which the support cylinder portion (9 </ b> B) is inserted. A support bracket (11) having a bracket cylinder part (11B) is provided, and the bracket cylinder part (11B) engages with at least one first engagement protrusion (9E) provided on the support cylinder part (9B). The first engaging protrusion (9E) is elastically displaceable and the stay portion (7A) is inserted into the stay insertion hole (9A). Sometimes, the state of being pressed directly or indirectly by the stay portion (7A) and fitted into the first engaged portion (11C) is maintained.

  Accordingly, in the invention described in claim 4, when the stay portion (7A) is inserted into the stay insertion hole (9A), the headrest support (9) is engaged and fixed to the support bracket (11). Therefore, since the positioning of the headrest support (9) and the positioning of the headrest (7) or the positioning in the front-rear direction are performed substantially simultaneously, the angle of the headrest (7) or the front-rear direction is not reduced without reducing the convenience of the vehicle seat. The position of can be changed.

  According to the fifth aspect of the present invention, a plurality of first engaging protrusions (9E) and first engaged portions (11C) are provided, and the first engaging protrusions (9E) and the first engaged portions are engaged. Each of the portions (11C) is provided at a rotationally symmetric position with respect to the center line (Lo) related to the inner peripheral surface of the bracket cylinder portion (11B).

  Thus, in the invention according to claim 5, even if a seated person or the like rotates the headrest support (9) with the centerline () as the rotation centerline, the first engagement protrusion (9E) is not moved to the first object. It can be made to engage with an engaging part (11C).

  According to the sixth aspect of the present invention, at least one second engaged member that engages with at least one second engagement protrusion (9H) provided on the support tube portion (9B) is provided on the bracket tube portion (11B). The joint portion (11D) is provided, and the headrest support (9) has an elastic portion (9J) that exerts an elastic force that presses the second engagement protrusion (9H) against the second engaged portion (11D). Is provided.

  Accordingly, in the invention described in claim 6, for example, the headrest support (9) is positioned with respect to the support bracket (11) by the engagement between the first engagement protrusion (9E) and the first engaged portion (11C). It is possible to prevent the headrest support (9) from being detached from the support bracket (11) due to the engagement between the second engagement protrusion (9H) and the second engaged portion (11D).

  Therefore, when the seated person or the like changes the position of the headrest support (9), the headrest support (9) can be prevented from being detached from the support bracket (11), so that the convenience of the vehicle seat is reduced. Without changing the angle of the headrest (7) or the position in the front-rear direction.

  In the seventh aspect of the present invention, a plurality of second engaging protrusions (9H) and second engaged portions (11D) are provided, and the second engaging protrusions (9H) and second engaged portions are engaged. Each part (11D) is provided at a rotationally symmetric position with respect to the center line (Lo) related to the inner peripheral surface of the bracket cylinder part (11B).

  Thus, in the invention according to claim 7, even if the seated person or the like rotates the headrest support (9) with the center line (Lo) as the rotation center line, the second engagement protrusion (9H) is It can be engaged with the engaged portion (11D).

  In invention of Claim 8, it has the cylindrical support cylinder part (9B) provided with the stay insertion hole (9A) in which the stay part (7A) of a headrest (7) is inserted so that it can protrude and retract, A headrest support to be mounted on the seat back of a vehicle seat, wherein a virtual line passing through the center of the stay insertion hole (9A) and parallel to the extending direction of the stay insertion hole (9A) is defined as a stay centerline (L1). When the virtual line passing through the center of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part (9B) and parallel to the longitudinal direction of the support cylinder part (9B) is the cylinder center line (L2), the center of the stay The line (L1) is inclined with respect to the cylinder center line (L2). Thereby, the angle of a headrest (7) or the position of the front-back direction can be changed.

  In invention of Claim 9, it has a cylindrical support cylinder part (9B) provided with a stay insertion hole (9A) into which a stay part (7A) of a headrest (7) is inserted so that it can be moved in and out. A headrest support to be mounted on a seat back of a vehicle seat, wherein the center (O1) of the stay insertion hole (9A) is relative to the center (O2) of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder portion (9B). It's off. Thereby, the angle of a headrest (7) or the position of the front-back direction can be changed.

  The invention according to claim 10 is a headrest applied to a vehicle seat comprising a seat cushion (3) for supporting the buttocks of the seated person and a seat back (5) for supporting the back of the seated person. A headrest main body (7B) for supporting the head and at least one stay portion (7A) extending from the headrest main body (7B) to the seat back (5) side, the headrest main body (7B) being seat back (5 ) And a stay support (7C) having a cylindrical support tube portion (7E) provided with a stay insertion hole (7D) into which the stay portion (7A) is inserted, And a stay support (7C) that is detachably or detachably attached to the headrest body (7B).

  Thus, in the invention according to claim 10, as with the invention according to claim 1, the angle of the headrest or the position in the front-rear direction can be changed while suppressing the complexity and weight increase of the structure of the vehicle seat. .

  Incidentally, the reference numerals in parentheses for each of the above means are examples showing the correspondence with the specific means described in the embodiments described later, and the present invention is indicated by the reference numerals in the parentheses of the above respective means. It is not limited to specific means.

1 is an external view of a vehicle seat according to an embodiment of the present invention. It is an exploded view of the vehicle seat which concerns on embodiment of this invention. A is sectional drawing of the headrest support 9 which concerns on embodiment of this invention. B is an external view of the headrest support 9 according to the embodiment of the present invention. C is a top view of the headrest support 9 according to the embodiment of the present invention. A is an external view of the support bracket 11 according to the embodiment of the present invention. B and C show the relationship between the headrest support 9 and the support bracket 11 according to the embodiment of the present invention. It is sectional drawing of the headrest support 9 which concerns on embodiment of this invention. A is an external view of a headrest support 9 according to an embodiment of the present invention. B is an external view of the support bracket 11 according to the embodiment of the present invention. A is sectional drawing of the headrest support 9 which concerns on embodiment of this invention. B is an external view of the support bracket 11 according to the embodiment of the present invention. C is an AA cross-sectional view of FIG. 7A. It is an exploded view of the headrest 7 which concerns on embodiment of this invention. It is a relationship between the headrest support 9 and the support bracket 11 according to the embodiment of the present invention.

  The “embodiment of the invention” described below shows an example of the embodiment. In other words, the invention specific items described in the claims are not limited to the specific means and structures shown in the following embodiments.

  In the present embodiment, the present invention is applied to a vehicle seat for a front seat. The arrows and the like indicating the directions given to the drawings are described for easy understanding of the relationship between the drawings. The present invention is not limited to the directions given in the drawings.

  At least one member or part described with at least a reference numeral is provided, except where “plurality”, “two or more”, and the like are omitted. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1. Overview of Vehicle Seat As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 3, a seat back 5, a headrest 7, and the like. The seat cushion 3 supports the buttocks of the seated person. The seat back 5 supports the back of the seated person. The headrest 7 is a member that is provided on the upper end side of the seat back 5 and supports the seated person's head.

  As shown in FIG. 2, the seat back 5 includes a metal frame 5A, a support member 5B, a board member 5C, and the like. The frame 5 </ b> A is a strength member that receives a load acting on the seat back 5. The support member 5B is assembled and fixed to the frame 5A to support the back of the seated person. The board member 5C covers the rear side of the frame 5A (seat back 5).

  The headrest 7 is provided with at least one stay portion 7A (two in this embodiment). The pair of stay portions 7 </ b> A are members that extend from the headrest 7 toward the seatback 5, and are members that connect the headrest 7 to the seatback 5 so as to be displaceable.

2. Connecting Structure of Headrest and Seat Back Each of the pair of stay portions 7 </ b> A is connected to the seat back 5 via a headrest support 9. As shown in FIG. 3A, the headrest support 9 has a cylindrical support cylinder portion 9B provided with a stay insertion hole 9A.

  As shown in FIG. 3B, the support cylinder portion 9B according to the present embodiment is a rectangular tube-shaped member. At one end in the longitudinal direction of the support tube portion 9B, an umbrella-shaped flange portion 9C protruding from the outer peripheral surface of the support tube portion 9B is provided. In the present embodiment, the support cylinder portion 9B and the flange portion 9C are integrally formed of resin.

  The stay insertion hole 9A is a hole into which the stay portion 7A is inserted so as to be freely moved in and out. An insertion port 9D into which the stay portion 7A is inserted is provided on the flange portion 9C side of the support cylinder portion 9B. The stay insertion hole 9A according to the present embodiment is a through hole that penetrates from the insertion port 9D to the other end in the longitudinal direction of the support tube portion 9B.

  The center of the stay insertion hole 9A, that is, the center O1 of the insertion port 9D (hereinafter referred to as the insertion port center O1) is, as shown in FIG. 3C, a cross-sectional center O2 drawn by the outer peripheral surface of the support cylinder portion 9B ( Hereinafter, it is deviated from the support center O2. Incidentally, the extending direction of the stay insertion hole 9A according to the present embodiment is parallel to the extending direction of the support cylinder portion 9B.

  The headrest support 9 is attached to the seat back 5 so as to be displaceable or detachable (in this embodiment, detachable). That is, as shown in FIG. 4A, the frame 5A, that is, the seat back 5, is provided with the same number (two in this embodiment) of support brackets 11 as the stay portions 7A.

  As shown in FIG. 4B, each support bracket 11 has a cylindrical bracket cylinder portion 11B provided with a support insertion hole 11A. 11 A of support insertion holes are holes in which the support cylinder part 9B is inserted.

  The support insertion hole 11A has a hole shape that is congruent or similar to the cross-sectional shape drawn by the outer peripheral surface of the support cylinder portion 9B. Specifically, the cross-sectional shape of the support cylinder portion 9B according to the present embodiment is a rectangular shape.

  For this reason, in the state where the support cylinder portion 9B is inserted into each support insertion hole 11A, each support cylinder portion 9B cannot rotate around the central axis Lo with respect to each support bracket 11. The central axis Lo is an imaginary line that passes through the center of the cross-sectional shape drawn by the inner peripheral surface of the bracket cylinder part 11B and is parallel to the longitudinal direction of the bracket cylinder part 11B. In addition, each bracket cylinder part 11B (support bracket 11) which concerns on this embodiment is metal, and is being fixed to the flame | frame 5A by welding.

  As shown in FIG. 3B, each support cylinder portion 9B is provided with at least one first engagement protrusion 9E. As shown in FIG. 4B, two first engaging protrusions 9E according to the present embodiment are provided at rotationally symmetric positions with respect to the central axis Lo. Specifically, the pair of first engagement protrusions 9E are provided at positions shifted by 180 ° about the central axis Lo.

  Each bracket cylinder portion 11B is provided with a first engaged portion 11C that engages with each first engagement protrusion 9E. Each first engaged portion 11C according to the present embodiment is configured by a through hole penetrating each bracket cylinder portion 11B.

  In the present embodiment, the two first engaged portions 11C are provided in the bracket cylinder portion 11B, and the first engaged portions 11C are provided at positions shifted by 180 ° about the central axis Lo. ing. That is, the pair of first engagement protrusions 9E are provided so as to be symmetric with respect to the virtual plane So including the stay center line L1, as shown in FIG. 3B.

  The stay center line L1 refers to a virtual line passing through the center O1 of the stay insertion hole 9A and parallel to the extending direction of the stay insertion hole 9A. The virtual plane So shown in FIG. 3B is a virtual plane orthogonal to the wall surface 9G where the first engagement protrusion 9E is not provided in the support cylinder portion 9B.

  Each first engagement protrusion 9E is displaceable between a non-engagement position (see FIG. 4B) and an engagement position (see FIG. 4C). As shown in FIG. 3B, each first engagement protrusion 9E is provided on a leaf spring portion 9F integrally formed on the wall surface of the support cylinder portion 9B. In a state where each leaf spring portion 9F is not elastically deformed, each first engagement protrusion 9E is in a non-engagement position.

  Each first engaging protrusion 9E is directly or indirectly (in this embodiment, directly) by the stay portion 7A, as shown in FIG. 4C, when the stay portion 7A is inserted into the stay insertion hole 9A. To be engaged with each first engaged portion 11C.

  For this reason, in a state where the stay portion 7A is inserted into the stay insertion hole 9A, the engagement state in which the first engagement protrusions 9E are fitted into the first engaged portions 11C is maintained. When the stay portion 7A is removed from the stay insertion hole 9A, each first engagement protrusion 9E is restored to the non-engagement position.

  Therefore, the headrest support 9 is detachable from the seat back 5 in a state where the stay portion 7A is removed from the stay insertion hole 9A. That is, a user such as a seated person can remove the headrest support 9 from the seatback 5 without using a tool or the like, and can attach the headrest support 9 or another headrest support 9 to the seatback 5. .

3. Features of the Vehicle Seat According to the Present Embodiment In the present embodiment, the headrest support 9 is detachably attached to the seat back 5.

  For this reason, in the present embodiment, for example, by changing the mounting state of the headrest support 9, the insertion port center O1 is located on the rear side with respect to the support center O2, and the insertion port center O1 is the support center. One of the second states located on the front side with respect to O2 can be selected. Thereby, the position of the headrest 7 in the front-rear direction can be changed.

  Further, for example, in the present embodiment, the headrest support 9 that is currently mounted and the headrest support 9 in which the position of the insertion port center O1 is different can be exchanged. This also makes it possible to change the position of the headrest 7 in the front-rear direction.

As described above, in the vehicle seat 1 according to the present embodiment, the position of the headrest 7 in the front-rear direction can be changed while suppressing the complexity and weight increase of the structure of the vehicle seat 1.
In the present embodiment, the first engaging protrusions 9E and the first engaged portions 11C corresponding thereto are provided at rotationally symmetric positions with respect to the center line Lo of the bracket cylinder portion 11B.

  Accordingly, even if the headrest support 9 is rotated around the center line Lo, the headrest support 9 can be attached to the support bracket 11. Therefore, the headrest support 9 can be easily attached to the seat back 5.

(Second Embodiment)
The extension direction of the stay insertion hole 9A according to the first embodiment was parallel to the longitudinal direction of the support cylinder portion 9B. On the other hand, in the headrest support 9 according to the present embodiment, as shown in FIG. 5, the stay center line L1, that is, the extending direction of the stay insertion hole 9A is inclined with respect to the cylinder center line L2.

  The cylinder center line L2 is an imaginary line passing through the center O2 of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part 9B and parallel to the longitudinal direction of the support cylinder part 9B. In the present embodiment, the cylinder center line L2 coincides with the center line Lo of the bracket cylinder portion 11B.

  Therefore, also in the present embodiment, the headrest support 9 that changes the mounting state of the headrest support 9 with respect to the support bracket 11 or that is different from the headrest support 9 to which the angle between the stay centerline L1 and the cylinder centerline L2 is currently mounted. The angle of the headrest 7 can be changed at least.

  In FIG. 5, the position of the insertion port center O1 is deviated from the support center O2. However, the present embodiment is not limited to this, and the insertion port center O1 and the support center O2 coincide. May be.

  That is, if the headrest support 9 in which the position of the insertion port center O1 is shifted from the support center O2 is used, the angle of the headrest 7 and the position in the front-rear direction can be changed by changing the mounting state of the headrest support 9 with respect to the support bracket 11. Can be changed.

  If the headrest support 9 in which the position of the insertion port center O1 matches the support center O2 is used, at least the angle of the headrest 7 can be changed by changing the mounting state of the headrest support 9 with respect to the support bracket 11.

(Third embodiment)
In the first embodiment, the pair of first engaging protrusions 9E and the pair of first engaged portions 11C are rotationally symmetric with respect to the center line Lo of the bracket cylinder portion 11B, and with respect to the virtual plane So. It was symmetrical. In contrast, in the present embodiment, as shown in FIG. 6A, the pair of first engagement protrusions 9E are rotationally symmetric with respect to the center line Lo, but are not symmetric with respect to the virtual plane So.

  As shown in FIG. 6B, the plurality of first engaged portions 11C includes two first engaged portions 11C (11CL, 11CR) as a set, and the two first engaged portions 11CL forming the set. , 11CR is symmetric with respect to the virtual plane So and rotationally symmetric with respect to the center line Lo.

  For this reason, for example, in the first state, the first engaged portion 11CL on the left side in FIG. 6B and the first engagement protrusion 9E engage, and in the second state, on the right side in FIG. 6B. The first engaged portion 11CR and the first engaging protrusion 9E are engaged.

  In the above description of the operation, the operation has been described by taking the headrest support 9 according to the first embodiment as an example. However, the present embodiment is naturally applicable to the headrest support 9 according to the second embodiment.

(Fourth embodiment)
1. Structure of Headrest Support and Support Bracket In the present embodiment, the cross-sectional shape drawn by the outer peripheral surface of the support tube portion 9B and the cross-sectional shape drawn by the inner peripheral surface of the bracket tube portion 11B are both circular. That is, both the support cylinder part 9B and the bracket cylinder part 11B are cylindrical.

  As shown in FIG. 7A, the support cylinder portion 9B is provided with at least one (two in this embodiment) second engagement protrusions 9H. As shown in FIG. 7B, the bracket cylinder portion 11 </ b> B is provided with second engaged portions 11 </ b> D that engage with the respective second engaging protrusions 9 </ b> H.

  And each 2nd engaging protrusion 9H and each 2nd to-be-engaged part 11D are provided in the rotationally symmetric position with respect to the centerline Lo of the bracket cylinder part 11B. That is, in the present embodiment, each of the first engagement protrusions 9E and each of the second engagement protrusions 9H is provided at a position shifted by 180 ° with respect to the center line Lo.

  As shown in FIG. 7A, each second engagement protrusion 9H can be displaced between a non-engagement position (position indicated by a two-dot chain line) and an engagement position (see FIG. 4C). Each first engagement protrusion 9E is provided on a leaf spring-like elastic portion 9J integrally formed on the wall surface of the support cylinder portion 9B.

  In a state where each elastic portion 9J is not elastically deformed, each first engagement protrusion 9E is in an engagement position. In a state where each elastic portion 9J is elastically deformed, each first engagement protrusion 9E is in a non-engagement position. That is, the elastic portion 9J exerts an elastic force that presses each second engagement protrusion 9H against each second engaged portion 11D.

  As shown in FIG. 7C, each second engaged portion 11D has an engaged surface 11E, a guide portion 11F, and the like. Each engaged surface 11E is a surface that is orthogonal to or intersects with the central axis Lo of the bracket cylinder portion 11B, and is a part that generates an engaging force in contact with each second engaging protrusion 9H.

  Each guide portion 11F is an inclined surface that makes sliding contact (hereinafter also referred to as “sliding contact”) with each second engagement protrusion 9H, and approaches the inner peripheral surface of the bracket cylinder portion 11B as it proceeds in the direction of the arrow. It is an inclined surface inclined like this.

  Thereby, from the state in which each second engagement protrusion 9H and each second engaged portion 11D are engaged, when each second engagement protrusion 9H is rotationally displaced in the direction of the arrow around the central axis Lo, Each second engaging protrusion 9H is displaced to the engaged position while being in sliding contact with each guide portion 11F.

  The “arrow direction” shown in FIG. 7C is a clockwise direction, but may be a counterclockwise direction. Each guide portion 11F according to the present embodiment is configured by an inclined surface that is smoothly curved so as to draw a spiral, but each guide portion 11F may be configured by a planar inclined surface.

  In FIG. 7B, in the direction parallel to the central axis Lo, a surface 11G parallel to the engaged surface 11E is provided on the opposite side across the guide portion 11F. However, the present embodiment is not limited to this. Absent. That is, for example, the lower part of the guide part 11F may be deleted.

2. Features of Headrest Support and Support Bracket According to this Embodiment In this embodiment, the headrest support 9 is positioned around the central axis Lo by the engagement between each first engagement protrusion 9E and each first engaged portion 11C. And it can suppress that the headrest support 9 remove | deviates from the support bracket 11 by engagement with each 2nd engagement protrusion 9H and each 2nd to-be-engaged part 11D.

  Therefore, when the seated person or the like changes the position of the headrest support 9, it is possible to suppress the headrest support 9 from being detached from the support bracket 11, so that the convenience of the vehicle seat 1 is reduced without deteriorating the convenience of the vehicle seat 1. The angle or the position in the front-rear direction can be changed.

  Each of the second engaging protrusions 9H and each of the second engaged portions 11D is provided at a rotationally symmetric position with respect to the center line Lo of the bracket cylinder portion 11B. Thereby, even if a seated person etc. rotate the headrest support 9 by making centerline Lo into the rotation centerline, the 2nd engagement protrusion 9H can be engaged with 2nd to-be-engaged part 11D.

  Each second engaged portion 11D is provided with a guide portion 11F. Thereby, in this embodiment, the engagement state of each 2nd engagement protrusion 9H can be switched easily by rotating the headrest support 9 (support cylinder part 9B) around the centerline Lo.

(Fifth embodiment)
In the above-described embodiment, the headrest support 9 for supporting the stay portion 7A is mounted on the seat back 5 so as to be displaceable or detachable.

  In contrast, in the present embodiment, as shown in FIG. 8, a stay support 7C into which the stay portion 7A is inserted is mounted on the headrest body 7B so as to be displaceable or detachable.

  The headrest body 7B is a member for supporting the head of the seated person. That is, it is a part of the headrest 7 that comes into contact with the head of the seated person. The stay support 7C has a cylindrical support cylinder portion 7E provided with a stay insertion hole 7D into which the stay portion 7A is inserted.

  The stay support 7C is attached to the headrest body 7B via the support bracket 7F so as to be displaceable or detachable. The specific configuration of the stay support 7C has the same structure as the headrest support 9 according to the first to fourth embodiments, for example.

  The support bracket 7F is a member to which the stay support 7C (support cylinder portion 7E) is assembled, and has the same structure as the support bracket 11 according to the first to fourth embodiments, for example. Note that the support bracket 7F is fixed in a state of being embedded in the headrest body 7B.

(Sixth embodiment)
In this embodiment, as shown in FIG. 9, a support bracket 11 having a plurality of bracket cylinder portions 11B that are not parallel to each other is used. Thereby, the position or angle of the headrest 7 in the front-back direction can be changed by changing the bracket cylinder part 11B to be used.

(Other embodiments)
The headrest support 9 (hereinafter also including the stay support 7C) according to the above-described embodiment is a headrest support in which the position of the insertion port center O1 is shifted with respect to the support center O2, and the stay centerline L1 becomes the cylinder centerline L2. However, the present invention is not limited to this.

  That is, the headrest support 9 in which the support center O2 and the insertion port center O1 coincide, the headrest support 9 in which the stay centerline L1 and the cylinder centerline L2 are parallel, and the like may be used. That is, it is sufficient if the headrest support 9 is mounted so as to be displaceable or detachable with respect to the seat back 5 (hereinafter also including the headrest body 7B).

  The specific configurations of the first engagement protrusion 9E, the second engagement protrusion 9H, the first engaged portion 11C, and the second engaged portion 11D are not limited to the above-described embodiment, and other It may be a configuration.

  Further, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 3 ... Seat cushion 5 ... Seat back 5A ... Frame 5B ... Support member 5C ... Board member 7 ... Headrest 7A ... Stay part 7C ... Stay support 7B ... Headrest main body 7D ... Stay insertion hole 7E ... Support cylinder part 7F ... Support bracket 9 ... Headrest support 9A ... Stay insertion hole 9B ... Support cylinder 9C ... Flange 9D ... Insertion port 9E ... First engagement protrusion 9G ... Wall surface 9F ... Leaf spring part 9H ... Second engagement protrusion 9J ... Elasticity Part 11 ... Support bracket 11A ... Support insertion hole 11B ... Bracket cylinder part 11C ... First engaged part 11D ... Second engaged part 11E ... Engaged surface 11F ... Guide part

Claims (10)

A seat cushion that supports the buttocks of the seated person,
A seat back that supports the back of the seated person,
A headrest provided on the upper end side of the seat back for supporting the head of the seated person;
At least one stay provided on the headrest and extending from the headrest toward the seat back, the stay being connected to the seat back so that the headrest can be displaced;
A headrest support having a cylindrical support tube portion provided with a stay insertion hole into which the stay portion is inserted and retracted freely, and the headrest support is detachably or detachably attached to the seat back. A vehicle seat comprising: and. An imaginary line passing through the center of the stay insertion hole, passing through the center of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part, with the imaginary line parallel to the extension direction of the stay insertion hole as the stay center line, When a virtual line parallel to the longitudinal direction of the part is the cylinder center line,
The vehicle seat according to claim 1, wherein the stay center line is inclined with respect to the cylinder center line.   The vehicle seat according to claim 1 or 2, wherein a center of the stay insertion hole is deviated from a center of a cross-sectional shape drawn by an outer peripheral surface of the support tube portion. A support bracket provided on the seat back, comprising a support bracket having a cylindrical bracket cylinder part provided with a support insertion hole into which the support cylinder part is inserted;
The bracket cylinder part has at least one first engaged part that engages with at least one first engagement protrusion provided on the support cylinder part,
The first engagement protrusion is elastically displaceable, and when the stay portion is inserted into the stay insertion hole, the first engagement portion is pressed directly or indirectly by the stay portion. The vehicle seat according to any one of claims 1 to 3, wherein a state of being fitted into the vehicle is maintained. Each of the first engaging protrusion and the first engaged portion is provided in a plurality.
The said 1st engagement protrusion and each said 1st to-be-engaged part are provided in the rotationally symmetrical position with respect to the centerline regarding the internal peripheral surface of the said bracket cylinder part. Vehicle seats. The bracket cylinder portion is provided with at least one second engaged portion that engages with at least one second engagement protrusion provided on the support cylinder portion,
The vehicle seat according to claim 5, wherein the headrest support is provided with an elastic portion that exerts an elastic force that presses the second engagement protrusion against the second engaged portion. Both the cross-sectional shape drawn by the outer peripheral surface of the support cylindrical portion and the cross-sectional shape drawn by the inner peripheral surface of the bracket cylindrical portion are circular,
A plurality of the second engagement protrusions and the second engaged portions are provided,
The said 2nd engaging protrusion and each said 2nd to-be-engaged part are provided in the rotationally symmetrical position with respect to the centerline regarding the internal peripheral surface of the said bracket cylinder part, It is characterized by the above-mentioned. Vehicle seats. A headrest support having a cylindrical support tube portion provided with a stay insertion hole into which a stay portion of the headrest is inserted and retracted freely, and mounted on a seat back of a vehicle seat,
An imaginary line passing through the center of the stay insertion hole, passing through the center of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part, with the imaginary line parallel to the extension direction of the stay insertion hole as the stay center line, When a virtual line parallel to the longitudinal direction of the part is the cylinder center line,
The headrest support, wherein the stay centerline is inclined with respect to the cylinder centerline. A headrest support having a cylindrical support tube portion provided with a stay insertion hole into which a stay portion of the headrest is inserted and retracted freely, and mounted on a seat back of a vehicle seat,
The center of the stay insertion hole is deviated from the center of the cross-sectional shape drawn by the outer peripheral surface of the support cylinder part. A headrest applied to a vehicle seat including a seat cushion for supporting a seated person's buttocks and a seat back for supporting a seated person's back,
A headrest body for supporting the head of the occupant;
At least one stay portion extending from the headrest body to the seat back side, wherein the stay portion connects the headrest body to the seat back;
A stay support having a cylindrical support tube portion provided with a stay insertion hole into which the stay portion is inserted, the stay support being detachably or detachably attached to the headrest body. Headrest characterized by.

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