JP2017030619A - Headrest support device - Google Patents

Abstract

A compact headrest support device having a simple structure and a compact structure is provided. A headrest support device 20 includes a headrest pillar 21 including a pillar base 25 and a pair of left and right pillar main bodies 26 extending from the pillar base, a first member 31 coupled to each other so as to form an internal space 38, and A support member 22 that includes the second member 32 and receives the pillar base in the internal space and supports the pillar base in a bearing hole 48 formed by the cooperation of the first member and the second member, and is coupled to the pillar base. The pillar side locking member disposed in the internal space and the support member are displaceably supported so as to be disposed in the internal space. The pillar side locking member is locked and the relative angle of the headrest pillar with respect to the support member is set. The support member side locking member 60 is fixed, and one of the support member and the pillar main body is coupled to the seat back 1 and the other is coupled to the headrest. [Selection] Figure 5

Description

  The present invention relates to a vehicle headrest support device, and more particularly to a device that supports a headrest so that the angle of the headrest can be changed with respect to a seat back.

  In a vehicle seat, a headrest support device that supports a headrest so that the angle of the headrest can be changed is known (for example, Patent Document 1). The headrest support device according to Patent Document 1 includes a pillar having a pair of left and right legs having a lower end coupled to a seat back and a horizontal axis connecting the upper ends of the legs, and is rotatable to the horizontal axis. It has a supported main frame and a cover material that covers the main frame. The headrest is formed by covering the cover material with the pad and the skin.

Japanese Patent No. 5038735

  The headrest support device according to Patent Document 1 has a configuration in which the main frame couples two metal plates to each other by caulking or the like, and therefore requires a special jig for assembly. In addition, since the latch plate provided on the horizontal shaft portion protrudes outside the main frame in order to fix the relative angle between the main frame and the pillar, a cover material that covers the main frame and the latch plate is required. Therefore, the headrest support device has a problem that the number of parts is large, the structure is complicated, and the size is increased.

  In view of the above background, it is an object of the present invention to provide a headrest support device that has a simple structure and is compact.

  In order to solve the above problems, one aspect of the present invention includes a pillar base portion (25) extending in the left-right direction and a pair of left and right pillar body portions (26) extending substantially perpendicular to the pillar base portion and substantially parallel to each other. A headrest pillar (21) and a first member (31) and a second member (32) coupled to each other so as to form an internal space (38), receiving the pillar base in the internal space, and A support member (22) that rotatably supports the pillar base in a bearing hole (48) formed in cooperation with the first member and the second member, and is coupled to the pillar base, A pillar-side locking member (50) arranged and displaceably supported by the support member and disposed in the internal space, and selectively locking the pillar-side lock member with respect to the support member. Above A support member side locking member (60) for fixing the relative angle of the drest pillar, one of the support member and the pillar main body being coupled to the seat back (1) and the other coupled to the headrest (24). A headrest support device (20) is provided.

  According to this aspect, since the pillar side locking member and the support member side locking member are disposed in the internal space surrounded by the first member and the second member, the pads are directly disposed around the support member. It is not necessary to provide a cover material around the support member. Thereby, simplification and size reduction of a headrest support device are attained.

  In the above aspect, the bearing hole may be formed in abutting portions where bearing walls (46, 47) formed in the first member and the second member respectively contact each other.

  According to this aspect, in a state where the first member and the second member are coupled to each other, the pillar base portion cannot be detached from the bearing hole, and the headrest pillar is supported by the support member with good stability.

  In the above aspect, one of the bearing walls may have an elastic claw (46B) for locking the pillar base, and the other of the bearing wall may have a receiving groove (47A) for receiving the elastic claw. .

  According to this aspect, since one of the bearing walls can hold the pillar base portion in a state where the first member and the second member are separated from each other, the assembling work is facilitated. Further, when the elastic claw is received in the receiving groove, both the bearing walls can be brought into contact with each other to form a bearing hole.

  In the above aspect, the first member and the second member may be coupled to each other at at least two coupling portions (34, 35) disposed so as to sandwich the pillar base portion.

  According to this aspect, the relative positions of the groove and the wall are stabilized, and the bearing hole is maintained in a predetermined shape. Thereby, the headrest pillar is supported by the support member with good stability.

  In the above aspect, the support member side locking member includes a locking position at which the pillar side locking member is locked to at least one of the first member and the second member, and the pillar side locking member. An urging member (64) that is pivotally supported between a release position away from the urging position and urges the support member side locking member toward the locking position; and It is good to further have an operation member (65) which has one end combined and the other end pulled out of the support member.

  According to this aspect, the support member side locking member can be operated with a simple configuration.

  In the above aspect, the pillar side locking member has a pillar side abutting portion (52), and one of the first member and the second member abuts on the pillar side abutting portion. The support member side abutting portion (54) for restricting the rotation range of the headrest pillar with respect to the support member is provided, and at least one of the pillar side abutting portion and the support member side abutting portion is flexible. It is preferable that a cushioning material (53) having

  According to this aspect, since the collision between the pillar-side abutting portion and the support member-side abutting portion is buffered, noise is reduced and the feeling during operation is improved.

  In the above aspect, the support member may be fastened to the seat back frame by bolts (83, 85, 87) that fasten the first member and the second member.

  According to this aspect, the number of bolts that fasten the first member, the second member, and the seat back frame can be reduced.

  According to the above configuration, it is possible to provide a headrest support device that is simple in structure and compact.

The perspective view which looked at the principal part of the vehicular seat provided with the headrest support device concerning an embodiment from the front The perspective view which looked at the headrest support device concerning an embodiment from the front The perspective view which looked at the headrest support device of the state where the 2nd member was removed from the front The perspective view which looked at the principal part of the vehicular seat provided with the headrest support device concerning an embodiment from back. V-V cross section of Fig. 2 VI-VI cross section of FIG.

  Hereinafter, an embodiment of a headrest support device of the present invention will be described with reference to the drawings. The headrest support device according to the present embodiment is used to attach a headrest to a seat back of a vehicle seat.

  As shown in FIG. 1, the seat back 1 is formed by covering a seat back frame 2 as a skeleton with a pad and an outer skin. The seat back frame 2 includes a pair of left and right side frames 3 that extend vertically, a first upper frame 4 that connects the upper ends of the side frames 3, and a first frame that connects the left and right side frames 3 below the first upper frame 4. 2 upper frames 5. The upper portions of the left and right side frames 3 and the frame main body portion 4A of the first upper frame 4 are formed from a single bent pipe member. The front portion of the central portion in the left-right direction of the frame main body portion 4A of the first upper frame 4 is deformed so as to form a flat portion facing forward.

  As shown in FIGS. 1 to 4, a pair of left and right first brackets 7 are welded to the plane portion of the frame main body portion 4 </ b> A. The pair of left and right first brackets 7 are disposed at symmetrical positions with a center line passing through the center in the left-right direction of the seat back 1 as a symmetry axis. Each first bracket 7 has a front side portion 7A facing forward and left and right side portions 7B extending rearward from both left and right edges of the front side portion 7A, and has a groove shape with a cross section opened rearward. Each first bracket 7 is coupled to the first upper frame 4 at the rear edges of the left and right side portions 7B. Each first bracket 7 extends upward and downward with respect to the first upper frame 4. The upper part 7C of the front side part 7A of each first bracket 7 projects forward with respect to the lower part 7D.

  As shown in FIGS. 4 to 6, the second bracket 11 is spanned between the pair of left and right first brackets 7. The second bracket 11 has a plate shape with a main surface facing front and rear, and both left and right ends are welded to the side portion 7B of the first bracket 7. The second bracket 11 is disposed at a distance from the frame main body portion 4A and projects upward from the upper edge of the frame main body portion 4A.

  As shown in FIGS. 1-3, the 2nd upper frame 5 makes | forms plate shape provided with the main surface which faces front and back. The second upper frame 5 is formed with beads at appropriate positions in order to increase rigidity. A fastening seat 5A that protrudes upward is formed at the center of the upper edge of the second upper frame 5 in the left-right direction.

  The headrest support device 20 includes a headrest pillar 21 and a support member 22 that rotatably supports the headrest pillar 21. In the present embodiment, the support member 22 is coupled to the seat back frame 2, and the headrest pillar 21 is coupled to the headrest 24.

  The headrest pillar 21 includes a pillar base portion 25 that extends to the left and right, and a pair of left and right pillar main body portions 26 that extend from the left and right ends of the pillar base portion 25 to be substantially perpendicular to the pillar base portion 25 and substantially parallel to each other. It is formed in a letter shape. The pillar base portion 25 and the left and right pillar body portions 26 are formed by bending a continuous metal rod or pipe member.

  The support member 22 includes a first member 31 and a second member 32 that are coupled to each other. Various materials can be selected for the first member 31 and the second member 32, but in the present embodiment, the first member 31 and the second member 32 are formed of a resin material. The first member 31 constitutes the rear part of the support member 22, and the second member 32 constitutes the front part of the support member 22. The first member 31 and the second member 32 are in contact with each other at the respective edge portions. The first member 31 and the second member 32 are coupled to each other in a pair of left and right first coupling portions 34, a second coupling portion 35, a pair of left and right third coupling portions 36, and a fourth coupling portion 37, which will be described later.

  As shown in FIGS. 5 and 6, the central portion of the second member 32 forms a bulging portion 32A that bulges forward with respect to the edge portion. By the bulging portion 32A, the first member 31 and the second member 32 cooperate with each other to define an internal space 38 therebetween. As shown in FIG. 2, the edge of the first member 31 projects outward from the edge of the second member 32. An edge rib 41 projecting forward is extended from the edge of the first member 31. The end surface of the edge portion of the second member 32 is disposed so as to contact the inner surface of the edge rib 41.

  As shown in FIGS. 2 to 4, the first member 31 and the second member 32 have the largest left-right width at the center in the up-down direction, and the left-right width gradually decreases downward. Specifically, the lower parts of the first member 31 and the second member 32 are formed in a triangular shape in which one of the corners is disposed below the other two corners when viewed from the front. The upper parts of the first member 31 and the second member 32 are formed in a substantially rectangular shape that is long from side to side when viewed from the front. The upper portions of the first member 31 and the second member 32 are formed so that the lateral width is smaller than the central portion. The left and right widths of the upper part of the first member 31 are formed smaller than the distance between the inner surfaces of the left and right first brackets 7. The left and right widths of the intermediate portion between the first member 31 and the second member 32 are formed larger than the distance between the inner surfaces of the left and right first brackets 7 and smaller than the distance between the outer surfaces of the left and right first brackets 7. Has been.

  As shown in FIGS. 3 and 5, a bearing portion 45 is formed in the inner space 38, which is a boundary portion between the central portion and the upper portion between the first member 31 and the second member 32. The bearing portion 45 has a pair of left and right first bearing walls 46 protruding forward from the front surface 31 </ b> A of the first member 31 and a pair of left and right second bearing walls 47 formed on the rear surface of the second member 32. The left and right first bearing walls 46 and the second bearing walls 47 are arranged at positions that are symmetric with respect to the center line C passing through the center of the support member 22 in the left-right direction. The first bearing wall 46 and the second bearing wall 47 corresponding to each other on the left and right are in contact with each other and form a bearing hole 48 in cooperation with the abutting surface. The left and right bearing holes 48 have an axis extending in the left-right direction, and penetrate the boundary between the first bearing wall 46 and the second bearing wall 47 to the left and right. The left and right bearing holes 48 are arranged coaxially with each other. The pillar base 25 is inserted into the left and right bearing holes 48 and is supported so as to be rotatable about an axis extending in the left-right direction.

  A flexible elastic claw 46B is formed at the opening end of the groove 46A that forms the second half of the bearing hole 48 of the first bearing wall 46, respectively. The elastic claw 46B locks the pillar base portion 25 disposed in the groove 46A. Thereby, even when the second member 32 is separated from the first member 31, the pillar base portion 25 can be held in the groove 46A. The elastic claw 46B is deformed when the pillar base 25 is inserted into the groove 46A to allow the insertion of the pillar base 25, and is restored after the insertion of the pillar base 25 into the groove 46A is completed, so that the outer periphery of the pillar base 25 is restored. Touch the surface. The elastic claw 46B constitutes a part of a bearing hole 48 that rotatably supports the pillar base 25. A receiving groove 47A for receiving the elastic claw 46B is formed on the abutting surface of the second bearing wall 47 with the first bearing wall 46.

  As shown in FIG. 2, notches 49 through which the pillar base 25 passes are formed on the left and right sides of the bulging portion 32 </ b> A of the second member 32. The notch 49 extends in the front-rear direction as viewed from the left-right direction, and has a front end closed, while a rear end extends to the edge of the second member 32 and opens. The front end of the notch 49 is formed in a semicircular shape when viewed from the left and right, and is arranged along a part of the outer peripheral surface of the pillar base 25. The notch 49 forms a hole closed in the circumferential direction in cooperation with the front surface 31 </ b> A of the first member 31.

  As shown in FIGS. 3 and 6, a pillar-side locking member 50 is provided at a portion located between the left and right first bearing walls 46 of the pillar base portion 25. The pillar side locking member 50 is formed by a plate member having a main surface facing left and right, and is coupled to the pillar base portion 25 by welding or the like. The pillar side locking member 50 is disposed on the center line C. A first locking groove 50 </ b> A and a second locking groove 50 </ b> B are formed on the outer peripheral portion of the pillar side locking member 50. The first locking groove 50 </ b> A and the second locking groove 50 </ b> B penetrate the pillar-side locking member 50 in the left-right direction, and open toward the radially outward center of the pillar base portion 25.

  The pillar-side locking member 50 is coupled to a shaft 52 that protrudes left and right in parallel with the pillar base portion 25. A buffer material 53 is attached to one end of the shaft 52. The buffer material 53 is formed of a flexible material such as rubber, is formed in a cylindrical shape, and covers one end of the shaft 52. On the front surface 31 </ b> A of the first member 31, a first abutting portion 54 protrudes forward from a portion facing one end of the shaft 52. One end of the shaft 52 abuts against the first abutting portion 54 via the cushioning material 53, so that the headrest pillar 21 is rotated backward (when viewed from the left, the clockwise rotation about the pillar base portion 25 is performed). Movement) limit position is determined. The cushioning material 53 absorbs an impact when the shaft 52 hits the first abutting portion 54, suppresses the generation of abnormal noise and improves the operational feeling. When one end of the shaft 52 abuts against the first abutting portion 54 via the cushioning material 53, the headrest pillar 21 is in the standing position (use position), and the pillar main body portion 26 extends upward from the pillar base portion 25.

  The limit position for forward rotation of the headrest pillar 21 (counterclockwise rotation about the pillar base 25 when viewed from the left) is such that the pillar-side locking member 50 is positioned on the front surface 31A of the first member 31. It is determined by contacting a second abutting portion (not shown) provided in When the pillar side locking member 50 contacts the second abutting portion, the headrest pillar 21 is in the retracted position (non-use position), and the pillar main body portion 26 extends forward from the pillar base portion 25. Thus, the headrest pillar 21 can be rotated between the standing position and the retracted position.

  Between the headrest pillar 21 and the first member 31, a first biasing member 56 that biases the headrest pillar 21 to the retracted position with respect to the first member 31 is provided. In the present embodiment, the first biasing member 56 is a torsion coil spring, and is a coil portion supported by the pillar base portion 25, one end locked to the other end of the shaft 52, and the front surface 31 </ b> A of the first member 31. And the other end locked to.

  A support member side locking member 60 is rotatably provided at a central portion of the front surface 31A of the first member 31 and below the bearing portion 45. The support member side locking member 60 is formed by a plate member whose main surface faces front and rear, and is rotatable to the outer peripheral portion of the bolt 81 that penetrates the first member 31 and the second member 32 in the thickness direction (front and rear direction). It is supported. As will be described later, the bolt 81 passes through a bolt insertion hole (not shown) formed in the first member 31 and the second member 32 in the fourth coupling portion 37 from the rear to the front, and the nut 82 is screwed. Thus, the first member 31 and the second member 32 are fastened. The bolt 81 is disposed on the center line C of the support member 22.

  A locking piece 60 </ b> A extending outward in the radial direction around the bolt 81 is provided on the outer peripheral portion of the support member side locking member 60. The support member side locking member 60 has a locking position in which the locking piece 60A is disposed in the first locking groove 50A or the second locking groove 50B around the bolt 81, and the locking piece 60A is the first engagement. It can be rotated between the release position released from the stop groove 50A or the second locking groove 50B. The first member 31 is provided with an abutting portion (not shown) that abuts when the support member side locking member 60 is in the locking position and the release position. When the support member side locking member 60 hits the abutting portion, the rotation range of the support member side locking member 60 with respect to the first member 31 is determined.

  Between the support member side latching member 60 and the first member 31, a second biasing member 64 that biases the support member side latching member 60 to the latching position with respect to the first member 31 is provided. Yes. In the present embodiment, the second urging member 64 is a tension coil spring, and has one end locked to the support member side locking member 60 and the other end locked to the front surface 31 </ b> A of the first member 31.

  A first operating member 65 and a second operating member 66 are coupled to the support member side locking member 60. The first operation member 65 is a belt-like member formed from a woven fabric or the like. The second operating member 66 is a control cable having a guide sleeve 66A and a cable 66B received in the guide sleeve 66A so as to be displaceable. One ends of the cables 66 </ b> B of the first operation member 65 and the second operation member 66 are coupled to the outer peripheral portion of the support member side locking member 60 so as to be rotatable. For example, a support shaft protrudes from the outer periphery of the support member-side locking member 60, and one end of the cable 66B of the first operation member 65 and the second operation member 66 is rotatably supported by the support shaft. A stopper member such as a push nut may be coupled to the tip portion.

  As shown in FIG. 2, the second member 32 has an opening (not shown) through which the first member 31 passes and an opening 32C through which the cable 66B of the second member 32 passes. . One end of the opening 32 </ b> C is disposed at a portion facing the coupling portion between the first operation member 65 and the cable 66 </ b> B and the support member side locking member 60, and is wider than the other portions. As a result, when the first operating member 65 and the cable 66B are coupled to the support member side locking member 60, the tool or the like can reach the support member side locking member 60 using the opening 32C. On the front surface of the second member 32, a locking groove 32E for locking a locking tool 66C provided at the end of the guide sleeve 66A is formed.

  As shown in FIG. 2, the other end of the first operation member 65 passes through the annular guide member 67 coupled to the side frame 3, then passes through the pad and the skin of the seat back 1, and Has been pulled out. The occupant can displace the support member side locking member 60 from the locking position to the release position by pulling the first operating member 65 against the biasing force of the second biasing member 64. The other end of the cable 66B of the second operating member 66 is connected to the output end of the link mechanism 69. The link mechanism 69 is connected to, for example, a reclining mechanism that rotatably supports the seat back 1 with respect to the seat cushion, and is configured to operate the second operating member 66 according to the operating state of the reclining mechanism. It is good to be. For example, when the reclining mechanism is unlocked, the link mechanism 69 pulls the second operation member 66 against the urging force of the second urging member 64 to lock the support member side locking member 60. It may be configured to be displaced from the position to the release position. The link mechanism 69 is supported by the second upper frame 5.

  As shown in FIGS. 2 and 3, the first member 31 and the second member 32 include a pair of left and right first coupling portions 34 disposed at the upper ends of the first member 31 and the second member 32, and the first member. 31 and a second coupling portion 35 disposed at the lower end of the second member 32, a pair of left and right third coupling portions 36 disposed at both left and right end portions of the central portion of the first member 31 and the second member 32, and It has the 4th coupling | bond part 37 arrange | positioned in the center part of the 1st member 31 and the 2nd member 32. FIG.

  In the fourth coupling portion 37, a bolt 81 is inserted into a bolt insertion hole (not shown) formed in the first member 31, the second member 32, and the support member side locking member 60, and a nut 82 is screwed into the bolt 81. By being attached, the first member 31 and the second member 32 are fastened together. By being coupled by the fourth coupling portion 37, the first member 31 and the second member 32 are maintained in a coupled state. In a state before the support member 22 is attached to the seat back frame 2, the first member 31 and the second member 32 are coupled to each other at the fourth coupling portion 37. The fourth coupling portion 37 is the center of the first member 31 and the second member 32 and is disposed on the center line C.

  Each of the first coupling portions 34 is disposed above the bearing portions 45 of the first member 31 and the second member 32 and is symmetric with respect to the center line C as an axis of symmetry. In addition, each first coupling portion 34 is disposed immediately above the first bearing wall 46.

  The left and right first coupling portions 34 are disposed at positions facing the second bracket 11. In the left and right first coupling portions 34, bolts 83 are inserted into bolt insertion holes (not shown) that penetrate the first member 31, the second member 32, and the second bracket 11 in the thickness direction (front-rear direction). The first member 31, the second member 32, and the second bracket 11 are fastened to each other by screwing the nut 84 onto the nut. That is, the first member 31, the second member 32, and the second bracket 11 are fastened together by the bolt 83 and the nut 84. The left and right first coupling portions 34 are disposed above the first upper frame 4.

  The second coupling portion 35 is disposed below the fourth coupling portion 37 (supporting member side locking member 60) of the first member 31 and the second member 32 and on the center line C.

  The second coupling portion 35 is disposed at a position facing the fastening seat 5 </ b> A of the second upper frame 5. In the second coupling portion 35, a bolt 87 is inserted into a bolt insertion hole (not shown) that penetrates the first member 31, the second member 32, and the fastening seat 5 </ b> A in the thickness direction (front-rear direction). Are screwed together, whereby the first member 31, the second member 32, and the fastening seat 5A are fastened together. That is, the first member 31, the second member 32, and the fastening seat 5A are fastened together by the bolt 87 and the nut 88.

  Each of the third coupling portions 36 is below the bearing portion 45 of the first member 31 and the second member 32 and above the fourth coupling portion 37, and is symmetric with respect to the center line C as an axis of symmetry. Has been placed. Further, each third coupling portion 36 is disposed on the left and right outer sides than the left and right first bearing walls 46.

  The left and right third coupling portions 36 are disposed at positions facing the lower portion 7D of the first bracket 7. In the left and right third coupling portions 36, bolts 85 are inserted into bolt insertion holes (not shown) that penetrate the first member 31, the second member 32, and the first bracket 7 in the thickness direction (front-rear direction). When the nut 86 is screwed to the first member 31, the first member 31, the second member 32, and the first bracket 7 are fastened together. That is, the first member 31, the second member 32, and the first bracket 7 are fastened together by the bolt 85 and the nut 86. The left and right third coupling portions 36 are disposed below the first upper frame 4.

  As shown in FIGS. 4 to 6, on the rear surface 31 </ b> B of the first member 31, first to third horizontal ribs 91 to 93 extending left and right, and a pair of left and right vertical ribs 94 extending vertically, A plurality of abutment ribs 95 project rearward. The first lateral rib 91 is disposed between the lower edge of the frame main body portion 4 </ b> A of the first upper frame 4 and the fourth coupling portion 37. The second and third lateral ribs 92 and 93 are disposed between the fourth coupling portion 37 and the second coupling portion 35 with a space in the vertical direction. The pair of left and right vertical ribs 94 are arranged so as to sandwich the fourth coupling portion 37 from the left and right, and the respective upper ends thereof are coupled to the first horizontal ribs 91 and the lower ends extend to the upper edge of the second upper frame 5. The second and third horizontal ribs 92 and 93 and the left and right vertical ribs 94 intersect each other. The first and second horizontal ribs 91 and 92 and the left and right vertical ribs 94 are disposed so as to surround the fourth coupling portion 37.

  The left and right ends of the first lateral rib 91 extend to the left and right first brackets 7. The plurality of contact ribs 95 extend upward from the upper side surface of the first lateral rib 91 on the rear surface 31 </ b> B of the first member 31. The protruding end edge of each contact rib 95 is formed in a shape complementary to the outer shape of the first upper frame 4, and is in contact with the outer surface of the first upper frame 4. For example, each abutment rib 95 gradually decreases in length toward the rear as it moves upward.

  As shown in FIG. 1, the distal end portions of the left and right pillar main body portions 26 are inserted into the headrest 24 and coupled to the headrest 24. The headrest 24 may include, for example, a support, a pad and an outer skin that are covered with the support, and a cylindrical pillar holding portion that is provided on the support and receives the left and right pillar main body portions 26. The pillar holding portion may include a lock member that engages with the pillar main body portion 26 and adjusts the insertion length of the pillar main body portion 26 with respect to the pillar holding portion.

  The effects of the headrest support device 20 configured as described above will be described below. The headrest support device 20 is disposed in a space surrounded by the headrest pillar 21 when viewed from the front at the headrest use position, so that the support member 22 and the headrest pillar 21 are disposed in a compact manner, and the headrest support device 20 is supported. The apparatus 20 can be downsized.

  Since the support member 22 is coupled to the seat back frame 2 at the left and right first to third coupling portions 34 to 36 sandwiching the pillar base portion 25 up and down, the headrest support device 20 supports the seat back frame 2 with good stability. Is done. In addition, since the support member 22 is coupled to the first upper frame 4 at the first and third coupling portions 34 and 36 and is coupled to the second upper frame 5 at the second coupling portion 35, the first to third couplings are performed. The distance in the up-down direction between the portions 34 to 36 can be increased, and the headrest support device 20 is supported with high stability with respect to the seat back frame 2.

  Further, since the first and third coupling portions 34 and 36 are coupled to the first bracket 7 and the second bracket 11 projecting upward and downward with respect to the first upper frame 4, the first and second sandwiching the pillar base portion 25 vertically. Both of the three coupling portions 34 and 36 can be coupled to the first upper frame 4, and the headrest support device 20 is supported with good stability with respect to the seat back frame 2. In addition, since the pair of first coupling portions 34 are disposed on the left and right sides of the pillar-side locking member 50, that is, the portion where the load is transmitted from the headrest pillar 21 to the support member 22, the headrest support device with respect to the seat back frame 2. 20 is supported with good stability.

  Further, since the support member 22 contacts the first upper frame 4 at the plurality of contact ribs 95, the headrest support device 20 is supported with good stability with respect to the seat back frame 2.

  Moreover, in said aspect, the 2nd coupling | bond part 35 is good to be arrange | positioned on the perpendicular line which passes along the pillar side latching member 50 seeing from the front.

  Since the second coupling portion 35 is disposed on a vertical line passing through the pillar-side locking member 50 when viewed from the front, the second coupling portion 35 efficiently applies the load applied to the support member 22 from the pillar-side locking member 50. Can receive.

  The periphery of the bolt 81 to which a load from the headrest pillar 21 is applied via the pillar side locking member 50 and the support member side locking member 60 is reinforced by the first and second horizontal ribs 91 and 92 and the left and right vertical ribs 94. Therefore, the deformation of the support member 22 is suppressed. In particular, the load from the headrest pillar 21 is efficiently transmitted to the vertical ribs 94 to the first and second upper frames 4 and 5 side.

  In the first to third coupling portions 34 to 36, the first member 31 and the second member 32 are fastened together by bolts 83, 85, and 87 that couple the support member 22 to the seat back frame 2, so that it is necessary. The number of bolts can be reduced.

  Since the pillar side locking member 50 and the support member side locking member 60 are disposed in the internal space 38 surrounded by the first member 31 and the second member 32, pads are directly disposed around the support member 22. It is not necessary to provide a cover material around the support member 22. Thereby, simplification and size reduction of the headrest support apparatus 20 are attained.

  The pillar base portion 25 is supported by a bearing hole 48 formed between the first member 31 and the second member 32, and is not detached from the support member 22. Therefore, the headrest pillar 21 is supported by the support member 22 with good stability.

  Further, since the elastic pawl 46B is provided on the first bearing wall 46, the first bearing wall 46 can hold the pillar base portion 25 even when the first member 31 and the second member 32 are separated from each other. . Thereby, the assembly | attachment operation | work of the headrest support apparatus 20 becomes easy. Further, when the elastic claw 46B is received in the receiving groove 47A, the first and second bearing walls 46 and 47 can contact each other to form a bearing hole 48.

  One end (pillar side abutting portion) of the shaft 52 that defines the rotation range of the headrest pillar 21 relative to the support member 22 and the first abutting portion 54 (the support member side abutting portion) are mutually connected via a cushioning material 53. As a result of the collision, noise due to the collision is reduced and the feel during operation is improved.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. In the above embodiment, the example in which the support member 22 is coupled to the seat back frame 2 and the left and right pillar main body portions 26 are coupled to the headrest 24 has been described. However, in other embodiments, the left and right pillar main body portions 26 are The support member 22 may be coupled to the headrest 24 by being coupled to the seat back frame 2. For example, the first upper frame 4 is provided with a pair of left and right cylindrical pillar support members, and the left and right pillar body portions 26 are inserted into the corresponding pillar support members and supported by the pillar support members. Then, the headrest 24 may be formed by covering the outer surface of the support member 22 with a pad and an outer skin. In this case, the height of the headrest 24 relative to the seat back 1 can be adjusted by changing the insertion length of the pillar main body portion relative to the pillar support member and fixing the insertion length at a predetermined position. it can.

1: Seat back 2: Seat back frame 3: Side frame 4: 1st upper frame 4A: Frame main-body part 5: 2nd upper frame 7: 1st bracket 11: 2nd bracket 20: Headrest support device 21: Headrest pillar 22 : Support member 24: headrest 25: pillar base portion 26: pillar main body portion 31: first member 32: second member 34: first coupling portion 35: second coupling portion 36: third coupling portion 37: fourth coupling portion 38 : Internal space 45: Bearing portion 46: First bearing wall 46B: Elastic pawl 47: Second bearing wall 47A: Receiving groove 48: Bearing hole 50: Pillar side locking member 52: Shaft (pillar side abutting portion)
53: Buffer material 54: 1st impact part (supporting member side impact part)
60: support member side locking member 64: second urging member 65: first operation member 66: second operation members 81, 83, 85, 87: bolt 91: first lateral rib 92: second lateral rib 93: Third lateral rib 94: vertical rib 95: contact rib

Claims (7)

A headrest pillar including a pillar base extending in the left-right direction and a pair of left and right pillar main bodies extending substantially perpendicular to the pillar base and substantially parallel to each other;
A bearing including a first member and a second member coupled to each other so as to form an internal space, receiving the pillar base in the internal space, and forming the first member and the second member in cooperation with each other. A support member that rotatably supports the pillar base in the hole;
A pillar-side locking member coupled to the pillar base and disposed in the internal space;
A support member-side member that is displaceably supported by the support member and is disposed in the internal space, and that fixes the relative angle of the headrest pillar with respect to the support member by selectively locking the pillar-side locking member. A stop member,
One of the said supporting member and the said pillar main-body part is couple | bonded with a seat back, The other is couple | bonded with a headrest, The headrest support apparatus characterized by the above-mentioned.   2. The headrest support according to claim 1, wherein the bearing hole is formed in an abutting portion where bearing walls (46, 47) formed in the first member and the second member respectively abut against each other. apparatus.   The headrest support device according to claim 2, wherein one of the bearing walls has an elastic claw for locking the pillar base portion, and the other of the bearing walls has a receiving groove for receiving the elastic claw.   The said 1st member and the said 2nd member are mutually couple | bonded in the at least 2 coupling | bond part arrange | positioned so that the said pillar base part may be pinched | interposed, The claim 1 characterized by the above-mentioned. The headrest support device described in 1. The support member side locking member includes a locking position at which the pillar side locking member is locked to at least one of the first member and the second member, and a release position separated from the pillar side locking member. Is supported in a pivotable manner,
A biasing member that biases the support member side locking member toward the locking position;
5. The operation member according to claim 1, further comprising an operation member having one end coupled to the support member-side locking member and the other end pulled out of the support member. The headrest support device according to one item. The pillar side locking member has a pillar side abutting portion,
One of the first member and the second member has a support member side abutting portion that regulates a rotation range of the headrest pillar with respect to the support member by contacting the pillar side abutting portion,
The cushioning material which has flexibility is provided in at least one of the said pillar side impact part and the said support member side impact part, The Claim 1 characterized by the above-mentioned. Headrest support device.   The headrest according to any one of claims 1 to 6, wherein the support member is fastened to the seat back frame by a bolt that fastens the first member and the second member to each other. Support device.

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