Headrest

Abstract

The present invention provides a partially movable headrest at low cost. A headrest (100) is provided with: a right stay bar (40R) and a left stay bar (40L); a support unit (30) supported by the right stay bar (40R) and the left stay bar (40L); and a moving unit (MV) configured so as to be movable relative to the support unit (30) in the front-rear direction of the vehicle seat, the moving unit (MV) having: a front cover (11) and a rear cover (12); and a center guide member (20) that is separate from the front cover (11), the center guide member (20) is configured in a columnar shape extending in the front-rear direction from the front cover (11), the support unit (30) has a center guide hole portion (31C) through which the center guide member (20) can be slidably inserted and which guides the movement of the moving unit (MV) in the front-rear direction, and the front cover (11) has a support portion through which the center guide member (20) can be slidably inserted and which supports the movement of the moving unit (MV) in the front-rear direction. The support portion supports the center guide member (20) in a state of sandwiching a portion of a base end portion of the center guide member (20) on the front cover (11) side in the front-rear direction.

Description

Technical Field

[0001] The present invention relates to a headrest. Background Art

[0002] Patent Documents 1 and 2 describe headrests in which at least a portion of an outer cover is configured to be movable in the seat front-rear direction.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Korean Registered Patent No. 10-2122712

[0006] Patent document 2: German Patent Publication No. 102007002615 Summary of the invention

[0007] Technical problem that the invention aims to solve

[0008] The purpose of the technology of the present invention is to provide a partially movable headrest at a low cost.

[0009] Technical solutions to the problem

[0010] A headrest of one embodiment of the technology of the present invention comprises: a strut, which is supported by a seat back of a vehicle seat; a supporting unit, which is supported by the strut; and a moving unit, which is configured to be movable relative to the supporting unit in the front-rear direction of the vehicle seat, the moving unit comprising: a first storage component and a second storage component, the first storage component and the second storage component are arranged in the front-rear direction of a space forming a space for storing the supporting unit; and a first guide component separate from the first storage component, the first guide component is configured to be a column extending from the first storage component in the front-rear direction in the space, the supporting unit having a first guide hole portion, the first guide hole portion being inserted in a slidable manner to guide the moving unit to move in the front-rear direction, the first storage component having a supporting portion, the supporting portion supporting the first guide component in a state of clamping a part of the base end portion of the first storage component side of the first guide component in the front-rear direction.

[0011] Effects of the Invention

[0012] According to the technology of the present invention, a partially movable headrest can be provided at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is an external perspective view showing a schematic structure of a headrest 100 as one embodiment of the technology of the present invention.

[0014] Figure 2 yes Figure 1 An exploded perspective view of the head restraint 100 is shown.

[0015] Figure 3 is from Figure 1 The headrest 100 is shown in an exploded perspective view when viewed from another direction.

[0016] Figure 4 1 is a diagram showing the front cover 11 , the operation button 13 , and the center guide member 20 in the headrest 100 , and is a perspective view showing a state in which the center guide member 20 is not attached to the front cover 11 .

[0017] Figure 5 It means in Figure 4 1 is a cross-sectional view showing a state where the front portion of the front cover 11 is cut along a plane perpendicular to the front-rear direction.

[0018] Figure 6 This is an enlarged view of the flange portion 22 and the front cover 11 in the process of being engaged, as seen from the rear side.

[0019] Figure 7 It is a perspective view of the central guide member 20 .

[0020] Figure 8 It is an exploded perspective view of the support unit 30 .

[0021] Fig. 9 1 is a schematic diagram of a cross section passing through the axis lines of the right stay 40R and the left stay 40L of the support unit 30 .

[0022] Fig.10 It is an exploded perspective view showing a state where the right stay 40R and the left stay 40L are removed from the lock support member 35 .

[0023] Fig.11 yes Fig.10 Schematic diagram of a cross section of the lock support member 35 perpendicular to the up-down direction shown.

[0024] Fig.12 This is a partially enlarged view of the headrest 100 in a state where the rear cover 12 is removed, as seen from the rear side.

[0025] Fig.13 Yes Fig. 9 The schematic cross-sectional view is shown when the position of the cutting plane is set between the rear wall portion 32 and the front wall portion 33.

[0026] Fig.14 The schematic diagram shows a cross section of the headrest 100 perpendicular to the up-down direction and passing through the axis of the center guide member 20 .

[0027] Fig.15 This is a diagram showing only the central guide member 20 and the engagement end portion 343, and is a diagram showing the central guide member 20 and the engagement end portion 343 when viewed from the upper side. Fig.14 A cross-sectional view is shown.

[0028] Fig.16 It indicates that the mobile unit MV is from Fig.15 The state shown is moved to the front-most position in the diagram.

[0029] Fig.17 It is a schematic diagram of a cross section perpendicular to the left-right direction of the headrest 100 and passing through the axis of the central guide member 20 , and is a diagram showing a state when the moving unit MV is located at an initial position.

[0030] Fig.18 It is a schematic diagram of a cross section perpendicular to the left-right direction of the headrest 100 and passing through the axis of the center guide member 20 , and is a diagram showing a state when the mobile unit MV is located at the frontmost position.

[0031] Fig.19 It means in Fig.16 The state shown is a diagram of a state in which the operation button 13 is pressed in the right direction R.

[0032] Fig. 20 The diagram shows an operation button 13 , a central guide member 20 , and a support unit 30 in the headrest 100 , and is a diagram showing a state in which the moving unit MV is located at an initial position as viewed from above.

[0033] Fig.21 The diagram shows an operation button 13 , a center guide member 20 , and a support unit 30 in the headrest 100 , and is a diagram showing a state when the moving unit MV is located at the frontmost position as viewed from above.

[0034] Fig. 22 It is a schematic diagram for explaining a preferred arrangement of the operation button 13 and the lock member 34 , and is a diagram of the headrest 100 as viewed from the front.

[0035] Description of Reference Numerals

[0036] 100 Headrest

[0037] 10 Accommodating components

[0038] 11 Front cover

[0039] 11L Left guide component

[0040] 11R Right guide component

[0041] 11Ra, 11La second convex part

[0042] 11Fr front surface

[0043] 111, 112 front cover wall

[0044] 113A, 113B convex parts

[0045] 113C bevel

[0046] 114 First convex part

[0047] 12 Rear cover

[0048] 12L, 12R connecting convex part

[0049] 120 Restriction rib

[0050] 13 Operation buttons

[0051] 131 Operating parts

[0052] 132 Butt part

[0053] 133 Spring

[0054] 20 Central guide part

[0055] 21 Main body

[0056] 21A, 21B convex parts

[0057] 21L, 21R edge

[0058] 22 Flange

[0059] 23 Protrusion

[0060] 23A, 23B engagement convex parts

[0061] 24 ribs

[0062] 211 vertical plane

[0063] 212 Inclined surface

[0064] 210 snap-on surface

[0065] 213 Wall

[0066] 214 closest part

[0067] 220 snap-on face

[0068] 30 Support unit

[0069] 31 Abutment

[0070] 31A Protrusion

[0071] 31C Central guide hole

[0072] 31L Left guide hole

[0073] 31R Right guide hole

[0074] 32 rear wall

[0075] 32A Pin

[0076] 32B Holding part

[0077] 32SD bottom surface

[0078] 32H Open

[0079] 32L Second insertion hole

[0080] 32SL left surface

[0081] 32R first insertion hole

[0082] 32SR right surface

[0083] 32U upper part

[0084] 32SU upper surface

[0085] 32Ra, 32La partition wall

[0086] 32D, 32E convex part

[0087] 32F, 32G ribs

[0088] 33 Anterior wall

[0089] 33A First elastic portion

[0090] 33B Second elastic part

[0091] 34 Locking parts

[0092] 341 Part 1

[0093] 341A, 342A stopper

[0094] 342 Part 2

[0095] 343 snap-on end

[0096] 344 Flat Panel

[0097] 345 Coil Spring

[0098] 35 Locking support component

[0099] 40L Left support rod

[0100] 40R Right support rod

[0101] 40Lc, 40Rc, 320 concave

[0102] 50 Extension coil spring

[0103] 321, 322 through holes

[0104] L1 Shortest Distance

[0105] C1, C2, C3, C4 center line

[0106] L3 Height

[0107] L4 Protrusion Height

[0108] L5 Maximum Distance

[0109] L2, L6, L7 distance

[0110] D1, D2 width DETAILED DESCRIPTION

[0111] Figure 1 This is an external perspective view showing a schematic structure of a headrest 100 as one embodiment of the technology of the present invention. Figure 2 yes Figure 1 An exploded perspective view of the head restraint 100 is shown. Figure 3 is from Figure 1 The headrest 100 is shown in an exploded perspective view when viewed from another direction. Figure 1 The headrest 100 shown in the figure shows a state where a pad as a cushioning member and a trim cover as a surface covering the pad are removed.

[0112] In the following description, the front of the occupant who is seated in a normal posture on the vehicle seat equipped with the headrest 100 is recorded as the front direction Fr, and the opposite direction of the front direction Fr is recorded as the rear direction Rr, and they are collectively referred to as the front-back direction of the vehicle seat. In addition, the right direction relative to the occupant when the occupant is observed from the rear is recorded as the right direction R, and the left direction of the occupant is recorded as the left direction L, and they are collectively referred to as the left-right direction of the vehicle seat. In addition, the direction perpendicular to the front-back direction and the left-right direction and the direction from the headrest 100 toward the seat surface side is recorded as the lower direction D, and the opposite direction of the lower direction D is recorded as the upper direction U, and they are collectively referred to as the up-down direction of the vehicle seat. The front-back direction, the left-right direction, and the up-down direction are directions that intersect each other. The left-right direction constitutes a first direction. The up-down direction constitutes a specific direction.

[0113] [Overall structure]

[0114] The headrest 100 is connected to the upper end of the seat back of the vehicle seat to support the rear of the occupant's head. The above-mentioned vehicle includes a car, an airplane, a train, an unmanned aerial vehicle, or a ship. The headrest 100 includes: a right stay 40R and a left stay 40L arranged at intervals in the left-right direction; a support unit 30 supported by the right stay 40R and the left stay 40L; a moving unit MV configured to be movable in the front-back direction relative to the support unit 30; and a tension coil spring 50 as an elastic member connecting the support unit 30 and the moving unit MV. The right stay 40R and the left stay 40L are composed of, for example, a metal frame, and the lower end thereof is inserted into the upper end of the seat back of the vehicle seat and supported by the seat back. The right stay 40R constitutes a first stay, and the left stay 40L constitutes a second stay. The support unit 30 has a central guide hole portion 31C, a right guide hole portion 31R, and a left guide hole portion 31L penetrating in the front-rear direction, and the details will be described later.

[0115] <Mobile Unit>

[0116] The mobile unit MV includes: a accommodating component 10, which is composed of a front cover 11 and a rear cover 12 arranged in the front-to-back direction to form a space for accommodating the supporting unit 30; an operating button 13, which is installed on the left side of the front cover 11; and a central guide component 20, which is configured as a column extending from the front side portion of the front cover 11 in the rear direction Rr and is configured to be removable relative to the front cover 11.

[0117] The front cover 11 and the rear cover 12 are provided in a state of sandwiching the support unit 30 in the front-rear direction, and the front cover 11 is provided at a position on the front side of the rear cover 12. The front cover 11 and the rear cover 12 are fixed by fitting using fitting claws or the like. The front cover 11 and the rear cover 12 are formed of, for example, a resin molded product. The front cover 11 constitutes a first storage member, the rear cover 12 constitutes a second storage member, the operation button 13 constitutes an operation portion, and the central guide member 20 constitutes a first guide member or an engaging member.

[0118] The central guide member 20 extends from the vertical and horizontal center portions of the front cover 11 in the rearward direction Rr. On the inner surface of the front cover 11, a columnar right guide member 11R and a columnar left guide member 11L extend toward the rear cover 12.

[0119] The right guide member 11R is disposed on the right and lower side of the central guide member 20. The left guide member 11L is disposed on the left and lower side of the central guide member 20. The right guide member 11R and the left guide member 11L are disposed side by side in the left-right direction. Fig.14As shown, the rear end surface of the right guide member 11R is open, and the opening is engaged with the connecting protrusion 12R provided on the inner surface of the rear cover 12. The rear end surface of the left guide member 11L is open, and the opening is engaged with the connecting protrusion 12L provided on the inner surface of the rear cover 12. The right guide member 11R and the left guide member 11L constitute a second guide member.

[0120] The central guide member 20, the right guide member 11R, and the left guide member 11L have a function of guiding the movement of the mobile unit MV when it moves in the front-rear direction. The central guide member 20 is inserted into the central guide hole portion 31C of the support unit 30 in a slidable manner. The right guide member 11R is inserted into the right guide hole portion 31R of the support unit 30 in a slidable manner. The left guide member 11L is inserted into the left guide hole portion 31L of the support unit 30 in a slidable manner. The movement of the mobile unit MV in the front-rear direction can be guided by the sliding of the central guide member 20, the right guide member 11R, and the left guide member 11L with the central guide hole portion 31C, the right guide hole portion 31R, and the left guide hole portion 31L.

[0121] The right guide member 11R and the left guide member 11L are integrally formed with the front cover 11. On the other hand, the central guide member 20 is formed separately from the front cover 11. The central guide member 20 is preferably formed to have higher rigidity than the accommodating member 10. By separating the central guide member 20 from the front cover 11, it is possible to determine optimal strength and material for each of the central guide member 20 and the front cover 11, thereby reducing the manufacturing cost of the headrest 100.

[0122] Figure 4 1 is a diagram showing the front cover 11 , the operation button 13 , and the center guide member 20 in the headrest 100 , and is a perspective view showing a state in which the center guide member 20 is not attached to the front cover 11 .

[0123] Figure 5 It means in Figure 4 The sectional view of the state where the front side portion of the front cover 11 is cut by a plane perpendicular to the front-rear direction. Figure 5 The hatched area in FIG. 1 is simplified, and the recess provided in the front cover 11 , the ribs for improving the strength, and the like are omitted from illustration.

[0124] like Figure 4 As shown, the central guide component 20 has: a quadrangular columnar main body 21 extending in the rearward direction Rr; a flange 22 arranged at the front end of the main body 21; and a protrusion 23 protruding from the approximate center of the lower end of the flange 22 in the left-right direction in the downward direction D.

[0125] like Figure 5As shown, a space SP for accommodating the flange portion 22 of the central guide member 20 is provided at the front side portion of the front cover 11 at the substantially center in the left-right direction and the up-down direction. A front cover wall portion 111 having an L-shaped shape as viewed in the front-back direction is provided separately from the front cover 11 behind the front surface 11Fr, and the right end edge and the lower end edge of the front cover wall portion 111 are connected to the front surface 11Fr. In addition, a front cover wall portion 112 having an inverted L-shaped shape that is a left-right inversion of the front cover wall portion 111 is provided separately from the front cover 11 behind the front surface 11Fr, and the left end edge and the lower end edge of the front cover wall portion 112 are connected to the front surface 11Fr. The space SP is formed by a portion connecting the front cover wall 111 and the front surface 11Fr, a space surrounded by the front cover wall 111 and the front surface 11Fr, and a portion connecting the front cover wall 112 and the front surface 11Fr, a space surrounded by the front cover wall 112 and the front surface 11Fr.

[0126] When the central guide member 20 is mounted on the front cover 11, the flange portion 22 is inserted into the space SP from the upper side to the lower side of the space SP. As a result, a portion of the flange portion 22 is engaged with the front cover 11, and the right end portion, the left end portion, and the lower end portion are clamped by the front cover wall portion 111, the front cover wall portion 112, and the front surface 11Fr, and the movement in the front-rear direction is firmly restricted. As a result, even when the moving unit MV moves in the front-rear direction and an impact is exerted on the headrest 100 in the front-rear direction, the central guide member 20 can be stably supported by the front cover 11.

[0127] The portion of the front cover 11 that forms the space SP (the front cover wall portion 111 and the front cover wall portion 112 and the front surface 11Fr and the side portions connecting them) constitutes a support portion that supports the central guide member 20 in a state of clamping a portion of the base end portion of the front cover 11 side of the central guide member 20 in the front-to-rear direction.

[0128] In this way, the central guide member 20 can be supported on the front cover 11 by partially engaging the flange portion 22 with the above-mentioned support portion in the upward and downward directions, so that the assembly of the central guide member 20 relative to the front cover 11 becomes easy. The thickness of the front side portion of the front cover 11 is different from the thickness of the left side portion and the right side portion. Specifically, the thickness of the front side portion of the front cover 11 is greater than the thickness of the left side portion and the right side portion. The thickness of the front side portion of the front cover 11 supporting the central guide member 20 is greater than that of other portions, so even when an impact is applied to the front side portion from the outside, the support of the central guide member 20 can be maintained, and the durability can be improved. The left side portion and the right side portion of the front cover 11 constitute the first area, and the front side portion of the front cover 11 constitutes the second area.

[0129] Figure 6This is an enlarged view of the state in which the flange portion 22 and the front cover 11 are engaged, as viewed from the rear side. A gap G is provided between the front cover wall portion 111 and the front cover wall portion 112, and the gap G constitutes an insertion portion for inserting the protrusion 23 of the central guide member 20. A trapezoidal protrusion 113A protruding toward the front cover wall portion 112 is provided at the upper portion of the end portion of the front cover wall portion 111 that is opposite to the front cover wall portion 112. A trapezoidal protrusion 113B protruding toward the front cover wall portion 111 is provided at the upper portion of the end portion of the front cover wall portion 112 that is opposite to the front cover wall portion 111. The protrusions 113A and 113B have an inclined surface 113C of a guiding shape that assists the protrusion 23 in inserting into the gap G. The gap G is constituted by the protrusions 113A and 113B in such a way that the entrance thereof becomes narrower toward the lower side.

[0130] The protrusion 23 of the central guide member 20 is provided with an engagement convex portion 23A protruding in the right direction R on the right side surface of the end portion on the flange portion 22 side, and an engagement convex portion 23B protruding in the left direction L on the left side surface of the end portion on the flange portion 22 side. When the flange portion 22 is engaged with the front cover 11, the engagement convex portion 23A and the engagement convex portion 23B come into contact with the inclined surface 113C and move in the downward direction D along the inclined surface 113C. Then, when the engagement convex portion 23A and the engagement convex portion 23B move downward over the convex portion 113A and the convex portion 113B, the engagement convex portion 23A engages with the convex portion 113A and the engagement convex portion 23B engages with the convex portion 113B, so that the upward and downward movement of the central guide member 20 is firmly restricted. By this engagement, a click feeling can be felt, and the central guide member 20 can be efficiently assembled with respect to the front cover 11. The engagement convex portion 23A and the engagement convex portion 23B constitute the engaged portion, and the convex portion 113A and the convex portion 113B constitute the engaging portion engaged with the engaged portion. In addition, the vertical positioning of the central guide member 20 is performed by making the rib 24 provided at the left end of the upper end of the flange portion 22 abut against the front cover wall portion 112.

[0131] like Figure 5 As shown, on the front side surfaces (surfaces opposite to the flange portion 22) of the front cover wall portion 111 and the front cover wall portion 112, a plurality of first protrusions 114 extending in the up-down direction and having curved linear surfaces are provided in the example of the figure. The cross-sectional shape of the surface of the first protrusion 114 is, for example, an arc shape. The flange portion 22 engages with the front cover 11 while sliding in contact with the first protrusion 114. The first protrusion 114 is used to reduce the resistance of the central guide member 20 when it slides, so that the central guide member 20 can be easily installed on the front cover 11. In addition, since the contact area between the front cover wall portion 111 and the front cover wall portion 112 and the flange portion 22 can be reduced by the first protrusion 114, the manufacturing deviation of the front cover 11 and the central guide member 20 can be absorbed.

[0132] The movable unit MV is configured to be movable through the locking member 34 (see Figure 8 The operation button 13 provided in the mobile unit is an operation part for releasing the locking member 34 of the support unit 30 from holding the mobile unit MV, and is configured to be pressable in the right direction R.

[0133] like Figure 4 As shown, the operation button 13 includes: a columnar operation member 131 with a flange, which is exposed outside the housing member 10; a block-shaped abutment portion 132, which is fixed to the right end of the operation member 131; and a spring 133 as a second force-applying member, which applies force to the abutment portion 132 and the operation member 131 in the left direction L. By pressing the operation member 131 in the right direction R, the abutment portion 132 can be moved in the right direction R.

[0134] Figure 7 2 is a perspective view of the central guide member 20. The main body 21 of the central guide member 20 is provided on its right side with: an engaging surface 220 having a plurality of engaging surfaces 210 arranged in the front-to-back direction to engage with the locking member 34 included in the support unit 30; and a pair of wall portions 213 which are erected from both ends of the engaging surface 220 in the up-down direction toward the locking member 34 side (right direction R).

[0135] exist Figure 7 In the example of the embodiment, the engaging surface 220 is configured by arranging five engaging surfaces 210 in the front-to-back direction. The engaging surface 210 includes a vertical surface 211 that rises from the main body 21 in the right direction R and is substantially perpendicular to the front-to-back direction, and an inclined surface 212 that rises from the base end edge of the vertical surface 211 in an inclined manner to the right R and rear Rr. The top edge of the inclined surface 212 and the top edge of the vertical surface 211 adjacent to the rear side of the inclined surface 212 are connected, for example, by a curved surface.

[0136] The wall portion 213 is in the shape of a plate that stands from the main body 21 in the right direction R and is substantially perpendicular to the up-down direction. The protruding length of the wall portion 213 from the main body 21 is greater than or equal to the protruding length of the engaging surface 210 from the main body 21. That is, when the pair of wall portions 213 are arranged in the up-down direction, the engaging surface 220 is configured to be covered by the wall portion 213 as a whole.

[0137] The upper surface, left surface and lower surface of the main body 21 are provided with: a linear convex portion 21A extending in the front-back direction and a linear convex portion 21B extending in the front-back direction and a curved surface. Figure 6As shown, six convex portions 21A are provided at the four corners of the main body 21 when viewed in the front-rear direction. Two convex portions 21B are provided between the convex portions 21A on the upper surface, one convex portion 21A is provided between the convex portions 21A on the left surface, and one convex portion 21B is provided between the convex portions 21A on the lower surface. The cross-sectional shape of the surface of each of the convex portion 21A and the convex portion 21B is an arc shape, and the curvature is different from each other. In detail, the curvature of the convex portion 21B is greater than the curvature of the convex portion 21A.

[0138] By providing the convex portion 21A and the convex portion 21B on the central guide member 20, the contact area between the central guide member 20 and the inner wall surface of the central guide hole portion 31C of the support unit 30 can be reduced to reduce the sliding resistance, and the mobile unit MV can be smoothly moved. In addition, by making the curvature of the convex portion 21A and the convex portion 21B different, for example, the convex portion 21A with a small curvature can function as a load transfer from the central guide member 20 to the support unit 30, and the convex portion 21B with a large curvature can function as a slide between the central guide member 20 and the central guide hole portion 31C. In this way, by using a plurality of convex portions (convex portion 21A and convex portion 21B), it is possible to achieve both smooth movement of the central guide member 20 and efficient load transfer from the mobile unit MV to the support unit 30.

[0139] like Figure 4 As shown, the upper surface, lower surface, right surface and left surface of the right guide member 11R are provided with a second convex portion 11Ra with a curved surface extending in the front-rear direction. The upper surface, lower surface, right surface and left surface of the left guide member 11L are provided with a second convex portion 11La with a curved surface extending in the front-rear direction.

[0140] By providing the second convex portion 11Ra and the second convex portion 11La on the right guide member 11R and the left guide member 11L, the contact area between the right guide member 11R and the left guide member 11L and the inner wall surface of the right guide hole portion 31R and the left guide hole portion 31L can be reduced to reduce the sliding resistance, so that the moving unit MV can be moved smoothly.

[0141] <Support unit>

[0142] Figure 8 3 is an exploded perspective view of the support unit 30. The support unit 30 includes: a locking member 34 capable of holding the mobile unit MV at a plurality of positions in the front-rear direction; a locking support member 35 supporting the locking member 34 so as to be movable in the left-right direction; and a right stay 40R and a left stay 40L supporting the locking support member 35.

[0143] (Locking parts)

[0144] The locking component 34 includes: a quadrangular prism-shaped first portion 341 extending in the left-right direction; a second portion 342 extending from the right end portion of the first portion 341 in the downward direction D; an engaging end portion 343 extending from the lower end portion of the second portion 342 in the left direction L; a flat plate portion 344 extending from the left end portion of the first portion 341 in the forward direction Fr and the downward direction D, and having a thickness direction consistent with the left-right direction; and a coil spring 345 serving as a first force-applying component, one end of which is fixed to the right side surface of the flat plate portion 344.

[0145] The engagement end portion 343 is configured to be engageable with the engagement surface portion 220 of the central guide member 20, and is a sharp shape with a width in the front-to-back direction becoming narrower toward the top. The other end of the coil spring 345 is fixed to the left end surface of the front wall portion 33 described later, and applies force to the locking member 34 in the left direction L opposite to the pressing direction (right direction R) of the operation button 13.

[0146] The flat plate portion 344 is provided with the contact portion 132 of the operation button 13 on its left side in a face-to-face relationship. When the operating member 131 of the operation button 13 is pressed in the right direction R, the contact portion 132 contacts the flat plate portion 344 and presses it in the right direction R. As a result, the locking member 34 moves in the right direction R. When the pressing of the operation button 13 is released, the locking member 34 moves in the left direction L by the urging force of the coil spring 345 and returns to the original initial position. The flat plate portion 344 is configured as a contact portion that can contact the contact portion 132 of the operation button 13.

[0147] A plate-shaped locking piece 341A whose thickness direction coincides with the vertical direction is protruded from the front surface of the first portion 341. A plate-shaped locking piece 342A whose thickness direction coincides with the vertical direction is protruded from the front surface of the second portion 342.

[0148] (Locking support member)

[0149] Fig. 9 1 is a schematic diagram of a cross section passing through the axis lines of the right stay 40R and the left stay 40L of the support unit 30 . Fig.10 It is an exploded perspective view showing a state where the right stay 40R and the left stay 40L are removed from the lock support member 35 . Fig.11 yes Fig.10 Schematic diagram of a cross section of the lock support member 35 perpendicular to the up-down direction shown. Fig.12 This is a partially enlarged view of the headrest 100 in a state where the rear cover 12 is removed, as seen from the rear side. Fig.13 Yes Fig. 9 The schematic cross-sectional view is shown when the position of the cutting plane is set between the rear wall portion 32 and the front wall portion 33. Fig.14FIG. 2 is a schematic diagram showing a cross section of the headrest 100 perpendicular to the up-down direction and passing through the axis of the central guide member 20 . Figure 5 Similarly, the simplified Fig. 9 , Fig.11 , Fig.13 as well as Fig.14 The shaded area in the figure.

[0150] like Figure 8 As shown, the locking support component 35 includes: a base 31 of a roughly rectangular shape extending in the left-right direction; a plate-like rear wall portion 32 erected in the upward direction U from the rear end portion of the base 31, and having a thickness direction consistent with the front-to-back direction; and a front wall portion 33 erected in the upward direction U from the front end portion of the base 31.

[0151] like Fig. 9 and Fig.13 As shown, three holes extending in the front-to-back direction are provided on the base 31. Specifically, the base 31 is provided with: a central guide hole 31C, through which the main body 21 of the central guide component 20 is inserted in a slidable manner to guide the movement of the mobile unit MV in the front-to-back direction; a right guide hole 31R, through which the right guide component 11R is inserted in a slidable manner to guide the movement of the mobile unit MV in the front-to-back direction; and a left guide hole 31L, through which the left guide component 11L is inserted in a slidable manner to guide the movement of the mobile unit MV in the front-to-back direction. As shown in FIG. Fig.12 As shown, the convex parts 21A and 21B of the central guide member 20 are in sliding contact with the inner wall surface of the central guide hole 31C. The central guide hole 31C constitutes a first guide hole, and the right guide hole 31R and the left guide hole 31L constitute a second guide hole.

[0152] like Fig. 9 As shown, the base 31 and the rear wall portion 32 are provided with a first insertion hole 32R that penetrates in the vertical direction and through which the right stay 40R is inserted, and a second insertion hole 32L that penetrates in the vertical direction and through which the left stay 40L is inserted. A partition wall portion 32Ra that divides the interior in the radial direction is provided at the end portion of the first insertion hole 32R on the side opposite to the seat back side, that is, the upper end portion. A partition wall portion 32La that divides the interior in the radial direction is provided at the upper end portion of the second insertion hole 32L. The partition wall portion 32Ra divides the upper end portion of the first insertion hole 32R into two in the left-right direction. The partition wall portion 32La divides the upper end portion of the second insertion hole 32L into two in the left-right direction.

[0153] like Fig.10As shown in the figure, the right stay 40R is formed into a tubular shape, and a notch 40Rb is provided on the front and rear surfaces of the upper end thereof. The left stay 40L is formed into a tubular shape, and a notch 40Lb is provided on the front and rear surfaces of the upper end thereof. The notch 40Rb is fitted with the partition wall portion 32Ra, and the notch 40Lb is fitted with the partition wall portion 32La, so that the lock support member 35 is supported by the right stay 40R and the left stay 40L. The rotation of the lock support member 35 around the axis extending in the up-down direction is restricted by the partition wall portion 32Ra and the partition wall portion 32La.

[0154] In this way, the right stay 40R and the left stay 40L can be fixed to the lock support member 35 by fitting the partition wall 32Ra and the partition wall 32La with the cutout 40Rb and the cutout 40Lb. Therefore, even if the upper ends of the right stay 40R and the left stay 40L are not connected by other components, the position between the two stays can be maintained by utilizing the rigidity of the lock support member 35. As a result, welding work or the like for connecting the right stay 40R and the left stay 40L is not required, and the manufacturing cost of the headrest 100 can be reduced. In addition, even if the intervals between the right stay 40R and the left stay 40L are different, the components of the stays can be made common, and the manufacturing cost of the headrest 100 can be reduced.

[0155] like Fig. 9 and Fig.10 As shown in FIG. 1 , a recess 40Lc extending in the front-rear direction is provided on the right side surface near the upper end of the left stay 40L. A recess 40Rc extending in the front-rear direction is provided on the left side surface near the upper end of the right stay 40R. Fig.10 As shown, an L-shaped pin 32A, for example, made of metal, which is inserted into the recess 40Lc and the recess 40Rc, is provided at a position corresponding to the recess 40Lc and the recess 40Rc in the rear wall portion 32. One end of the pin 32A is held by a holding portion 32B provided on the rear surface of the rear wall portion 32, and the other end side is inserted into the recess 40Lc and the recess 40Rc.

[0156] By inserting the pin 32A through the recessed portion 40Lc and the recessed portion 40Rc, the right stay 40R and the left stay 40L are restricted from moving in the downward direction D relative to the lock support member 35, thereby preventing the lock support member 35 from falling off the right stay 40R and the left stay 40L. The pin 32A is one form of a restriction member that restricts the right stay 40R and the left stay 40L from moving in the axial direction.

[0157] like Fig.10 As shown, on the rear surface of the rear wall portion 32, when viewed in the front-rear direction, a plurality of ribs extending in the left-right direction are provided between the right stay 40R and the left stay 40L (in the example of the figure, two ribs are rib 32F and rib 32G). Fig.11As shown, the rib 32G is provided adjacent to the portion of the pin 32A inserted into the recess 40Rc and the portion of the pin 32A inserted into the recess 40Lc in the left-right direction. The rib 32G is configured to be wider in the vertical direction than the rib 32F.

[0158] By making the rib 32G wider in this way, when a rotational force about an axis extending in the vertical direction acts on the lock support member 35, the load can be transmitted in the order of the rib 32G, the pin 32A, the right stay 40R, and the left stay 40L. By making the rib 32G wider, durability can be ensured.

[0159] like Fig.12 As shown in FIG. 1 , a portion of the inner wall surface of the central guide hole portion 31C of the base 31 is configured to be elastically deformable. Fig.12 In the example of FIG. 1 , the inner wall surface of the central guide hole portion 31C includes an upper surface 32SU and a lower surface 32SD arranged opposite to each other in the vertical direction, and a right surface 32SR and a left surface 32SL arranged opposite to each other in the horizontal direction. In the present embodiment, only the lower surface 32SD of the upper surface 32SU and the lower surface 32SD is configured to be elastically deformable, and only the left surface 32SL of the right surface 32SR and the left surface 32SL is configured to be elastically deformable. The upper surface 32SU and the lower surface 32SD constitute the first surface, and the right surface 32SR and the left surface 32SL constitute the second surface.

[0160] A through hole 322 penetrating in the front-to-back direction is provided near the lower side of the lower surface 32SD of the base 31. Due to the presence of the through hole 322, the lower surface 32SD has a structure that is bent toward the through hole 322. In the base 31, a through hole 321 penetrating in the front-to-back direction is provided next to the left side of the left surface 32SL. Due to the presence of the through hole 321, the left surface 32SL has a structure that is bent toward the through hole 321.

[0161] In this way, the left surface 32SL and the lower surface 32SD are configured to be elastically deformable, so that the operation load when the central guide member 20 is moved relative to the support unit 30 can be reduced and the central guide member 20 can be moved smoothly. In addition, the shaking of the central guide member 20 during movement can be suppressed. In addition, the right surface 32SR opposite to the left surface 32SL is configured to be non-elastically deformable, so that the central guide member 20 can be suppressed from moving in the left and right directions. In addition, the right surface 32SR can effectively release the load applied to the mobile unit MV to the base 31.

[0162] In addition, the upper surface 32SU facing the lower surface 32SD is configured not to be elastically deformable, so that the central guide member 20 can be suppressed from moving in the vertical direction. In addition, the load applied to the moving unit MV can be effectively released to the base 31 by the upper surface 32SU.

[0163] like Fig.13 As shown in the figure, on the side wall surface on the right side of the central guide hole portion 31C (the side wall surface facing the engagement surface portion 220 of the central guide member 20), when viewed in the left-right direction, an opening 32H for accommodating the engagement end portion 343 of the locking member 34 is provided between the rear wall portion 32 and the front wall portion 33. The opening 32H is provided at a position facing the engagement surface portion 220 of the central guide member 20 inserted through the central guide hole portion 31C. In the base 31, on the right side of the central guide hole portion 31C in the area between the rear wall portion 32 and the front wall portion 33 when viewed from the top-bottom direction, a recessed portion 320 connected to the opening 32H and the right guide hole portion 31R is provided.

[0164] At least one (at the upper side portion 32U of the central guide hole portion 31C) is provided extending in the left-right direction. Fig.13 In the example of the embodiment, there are two) linear convex portions 32D with curved surfaces. The cross-sectional shape of the surface of the convex portion 32D is, for example, an arc shape. The first portion 341 of the locking member 34 is arranged on the upper portion 32U and is in sliding contact with the convex portion 32D.

[0165] The second portion 342 and the engaging end portion 343 of the locking member 34 are disposed in the recess 320. When the operation button 13 is not pressed, the engaging end portion 343 is held in a state of entering the central guide hole 31C from the opening 32H by the force of the coil spring 345. The engaging surface portion 220 is disposed facing the opening 32H. Fig.14 As shown, the engagement end portion 343 entering the central guide hole portion 31C from the opening 32H is configured to be engageable with any one of the engagement surfaces 210 of the engagement surface portion 220 .

[0166] like Fig.14 As shown in FIG. 1 , the top end portion of the engagement end portion 343 of the locking member 34 is shaped to mesh with each engagement surface 210 of the engagement surface portion 220. The engagement surface portion 220 and the engagement end portion 343 constitute a so-called ratchet mechanism. As will be described in detail later, by means of the ratchet mechanism, the mobile unit MV can be manually moved in the forward direction Fr without operating the operation button 13. On the other hand, in the case of moving the mobile unit MV in the rearward direction Rr, it is necessary to operate the operation button 13.

[0167] like Fig.13As shown in the figure, on the surface of the front wall portion 33 opposite to the locking member 34, a first elastic portion 33A capable of elastic displacement in the front-back direction is provided separately in the left-right direction. The first elastic portion 33A is accommodated in a through hole that penetrates the front wall portion 33 in the front-back direction, and is in the shape of a plate extending downward from the upper side of the through hole. The first elastic portion 33A has elasticity that stabilizes the state in which the surface opposite to the locking member 34 protrudes slightly backward from the rear end surface of the front wall portion 33, and is configured to be able to abut against the first portion 341 of the locking member 34.

[0168] By making the first elastic part 33A abut against the first part 341, the first part 341 is clamped by the rear wall part 32 and the front wall part 33 in the front-rear direction, so that the first part 341 is firmly supported by the locking support member 35. In addition, even if there is a manufacturing deviation between the locking support member 35 and the locking member 34, the deformation of the first elastic part 33A can be used to absorb the change. In addition, when the operation button 13 is pressed and the locking member 34 moves in the left-right direction, the deformation of the first elastic part 33A can prevent the movement from being hindered. In addition, when the locking member 34 moves in the left-right direction, the sliding resistance between the locking member 34 and the locking support member 35 can be reduced by the convex part 32D. Therefore, the locking member 34 can be moved smoothly. In addition, by providing a plurality of convex parts 32D, dust can be guided between the convex parts 32D, and the increase in sliding resistance caused by dust can be suppressed.

[0169] A second elastic portion 33B capable of elastic displacement in the vertical direction is also provided in the front wall portion 33 in a vertically separated manner. The second elastic portion 33B is accommodated in a through hole that penetrates the front wall portion 33 in the front-to-back direction, and is composed of a claw that extends from the upper side of the through hole in the downward direction D and the left direction L and has an L-shaped shape when viewed in the front-to-back direction.

[0170] The locking piece 341A and the locking piece 342A of the locking member 34 are inserted into the gap between the second elastic portion 33B and the base 31. The second elastic portion 33B has elasticity that makes the state in which the locking piece 341A and the locking piece 342A are forced downward become a stable state. The locking member 34 is in a state in which the locking piece 341A and the locking piece 342A are clamped in the vertical direction by the second elastic portion 33B and the base 31. Therefore, it is also stably supported by the locking support member 35 in the vertical direction. In addition, even if there is a manufacturing deviation between the locking support member 35 and the locking member 34, the change can be absorbed by the deformation of the second elastic portion 33B. In addition, when the locking member 34 moves in the left and right directions, the deformation of the second elastic portion 33B can prevent the movement from being hindered.

[0171] like Figure 8As shown, on the front surface of the rear wall portion 32, at a position opposite to the first portion 341 of the locking member 34, at least one (at Figure 8 The first portion 341 of the locking member 34 is in sliding contact with the convex portion 32E.

[0172] When the locking member 34 moves in the left-right direction, the sliding resistance between the locking member 34 and the locking support member 35 can be reduced by the convex portion 32E. Therefore, the locking member 34 can be moved smoothly. In addition, by providing a plurality of convex portions 32E, dust can be guided between the convex portions 32E, and the increase in sliding resistance caused by dust can be suppressed. In addition, even if there is a manufacturing deviation between the locking support member 35 and the locking member 34, the deviation can be absorbed.

[0173] like Fig.10 As shown, a protrusion 31A extending in the rear direction Rr is provided at the center of the lower end of the rear surface of the base 31 in the left-right direction. One end of a tension coil spring 50 as one embodiment of an elastic member is fixed to the protrusion 31A. The other end of the tension coil spring 50 is fixed to the protrusion 23 of the central guide member 20. The tension coil spring 50 has a function of applying force to the protrusion 23 in a direction close to the support unit 30.

[0174] Fig.15 This is a diagram showing only the central guide member 20 and the engagement end portion 343, and is a diagram showing the central guide member 20 and the engagement end portion 343 when viewed from the upper side. Fig.14 In the headrest 100, as shown in FIG. Fig.14 and Fig.15 As shown, the state in which the engagement end portion 343 is engaged with the engagement surface 210 located closest to the front cover 11 is regarded as the initial position of the mobile unit MV.

[0175] When the mobile unit MV Fig.15 When the central guide member 20 moves in the forward direction Fr in the state shown, the engaging end 343 engages with the engaging surface 210 located at the second closest position to the front cover 11, and the position of the mobile unit MV is maintained in the state of having moved one stage in the forward direction Fr. If the mobile unit MV moves further in the forward direction Fr from this state, the engaging surface 210 engaging with the engaging end 343 moves forward in sequence. Fig.16 As shown, when the engagement end 343 is engaged with the engagement surface 210 located closest to the rear cover 12, the mobile unit MV is configured to be unable to move further in the forward direction Fr. Fig.16As shown, the state where the engagement end 343 is engaged with the engagement surface 210 located closest to the rear cover 12 is regarded as the frontmost position of the mobile unit MV. In this way, the headrest 100 can hold the mobile unit MV at five positions in the front-rear direction.

[0176] In the central guide member 20, a pair of wall portions 213 are provided in a state where the engaging end portion 343 is sandwiched in the vertical direction. By providing the wall portion 213, the relative movement of the engaging end portion 343 in the front-rear direction with respect to the engaging surface portion 220 can be guided. In addition, no matter where the mobile unit MV is located in the moving range, the engaging end portion 343 is sandwiched in the vertical direction by the pair of wall portions 213, so that the mobile unit MV can be prevented from moving in the vertical direction. Therefore, the mobile unit MV can be stably maintained at a desired position.

[0177] In the central guide member 20, the right end edge 21R of the main body 21 is parallel to the front-rear direction, whereas the left end edge 21L of the main body 21 is inclined relative to the front-rear direction. In other words, the width of the main body 21 of the central guide member 20 in the left-right direction decreases as the distance from the flange 22 increases. As a result, the width D1 in the left-right direction of the region of the central guide member 20 where the engagement surface 210 is located closest to the front cover 11 (see FIG. 2 ) is 21R. Fig.15 ) and the width D2 in the left-right direction of the region where the engagement surface 210 of the central guide member 20 is provided at a position closest to the rear cover 12 (see Fig.15 ) are different, and the width D2 is smaller than the width D1.

[0178] According to such a structure, when the mobile unit MV is moved from Fig.15 When the state shown in the figure moves in the forward direction Fr, the mobile unit MV is in the initial position ( Fig.15 In the state shown in FIG. 1 , the gap between the central guide hole 31C and the main body 21 in the left-right direction is small. Therefore, when the mobile unit MV is moved in the forward direction Fr, the sliding resistance relative to the base 31 is high, and a large force is required to move the mobile unit MV. Fig.15 As the mobile unit MV is moved in the forward direction Fr successively from the state shown in the figure, the above-mentioned sliding resistance gradually decreases. Therefore, the force required for moving the mobile unit MV becomes smaller. On the other hand, as described below, when the mobile unit MV is moved in the forward direction Fr successively, the tensile load of the tension coil spring 50 increases. Therefore, no matter where the mobile unit MV is moved to, it can be moved with the same force.

[0179] Next, refer to Fig.17 and Fig.18 The state of the tension coil spring 50 when the moving unit MV moves will be described. Fig.17 and Fig.18 is a schematic diagram of a cross section perpendicular to the left-right direction of the headrest 100 and passing through the axis of the central guide member 20, Fig.17 Indicates the state where the mobile unit MV is at the initial position, Fig.18 Indicates the state where the mobile unit MV is located at the frontmost position.

[0180] like Fig.17 As shown, when the mobile unit MV is in the initial position, the length of the tension coil spring 50 in the front-to-back direction is the initial value (minimum value). Fig.17 The state shown in FIG. 1 moves forward in the direction Fr, the length of the tension coil spring 50 in the front-rear direction increases, and the tension load of the tension coil spring 50 increases. Fig.18 As shown, the length of the tension coil spring 50 in the front-rear direction becomes the maximum value when the moving unit MV is located at the frontmost position.

[0181] When the extension coil spring 50 is extended from the state where the mobile unit MV is located at the initial position, the mobile unit MV rotates around the rear end and the upper end of the central guide member 20. Fig.18 As shown by the black arrow in FIG. 1 , a counterclockwise rotation force is applied. That is, a force that tilts the mobile unit MV in the forward direction Fr acts on the mobile unit MV. In this embodiment, the limiting rib 120 (see FIG. 120 ) that limits the tilt of the mobile unit MV in the forward direction Fr caused by this force is provided. Figure 2 , Fig.17 , Fig.18 ) is provided on the inner surface of the rear cover 12. The limiting rib 120 constitutes a limiting portion. Figure 2 As shown, the limiting rib 120 is in the shape of a plate extending in the front-rear direction with its thickness direction being consistent with the left-right direction. Figure 2 In the example of FIG. 1 , three are arranged in the left-right direction at the upper end portion of the rear cover 12 and at the center portion in the left-right direction.

[0182] like Fig.17 As shown, when the mobile unit MV is located at the initial position, the limiting rib 120 is not located above the supporting unit 30, and the supporting unit 30 cannot contact the limiting rib 120. Fig.17 In the state shown, when moving in the front direction Fr, the support unit 30 overlaps with the restriction rib 120 when viewed in the up-down direction, and the gap between the support unit 30 and the restriction rib 120 becomes very small.

[0183] In the present embodiment, for example, in the moving range of the mobile unit MV from the state where the engaging end 343 engages with the engaging surface 210 located at the second closest position to the front cover 11 to the state where the mobile unit MV is at the frontmost position, the support unit 30 and the limiting rib 120 overlap in the vertical direction. In this moving range, the extension amount of the tension coil spring 50 is large, so the mobile unit MV is easy to rotate. However, in this moving range, if Fig.18 As shown, the upper end edge of the support unit 30 is brought into contact with the limiting rib 120 , thereby limiting the tilting of the moving unit MV in the forward direction Fr.

[0184] Thus, even when the length of the tension coil spring 50 in the front-to-back direction is greater than the threshold value THL (the length in the state where the engagement end 343 is engaged with the engagement surface 210 located at the second closest position to the front cover 11) and the posture of the mobile unit MV relative to the support unit 30 becomes unstable, the contact between the limiting rib 120 and the support unit 30 can limit the tilt of the mobile unit MV in the front direction Fr relative to the support unit 30. Therefore, no matter where the mobile unit MV is located in its movable range, the posture of the mobile unit MV can be stabilized.

[0185] In addition, when the length of the tension coil spring 50 in the front-to-back direction is less than the threshold value THL, the limiting rib 120 does not contact the support unit 30, so the movement of the mobile unit MV can be smoothly performed. On the other hand, when the length of the tension coil spring 50 in the front-to-back direction is greater than the threshold value THL, the support unit 30 contacts the limiting rib 120 and may become a resistance to the movement of the mobile unit MV. However, in this case, the tension of the tension coil spring 50 becomes large, so that the user does not feel the resistance. As a result, the mobile unit MV can be smoothly moved throughout its entire movable range.

[0186] Fig.18 denoted by the shortest distance L1 in the front-rear direction between the support unit 30 and the rear cover 12 when the mobile unit MV is located at the frontmost position. Fig.16 2 shows a distance L2 between the closest portion 214 of the main body 21 and the engagement end 343, which is the shortest distance in the rear direction Rr relative to the engagement end 343. The distance L2 is preferably greater than the shortest distance L1.

[0187] Thus, when a load is applied to the rear cover 12 from the outside, the rear cover 12 collides with the support unit 30 before the proximal portion 214 of the main body 21 collides with the engagement end portion 343, so that the load can be concentrated on the support unit 30. Thus, the load can be prevented from being transmitted to the locking member 34, and the position of the mobile unit MV can be stably maintained even when impacted. In addition, the durability of the locking member 34 can be improved.

[0188] In the headrest 100 , when the moving unit MV is moved in the front direction Fr, it is not necessary to operate the operation button 13 . On the other hand, when the moving unit MV is moved in the rear direction Rr, it is necessary to operate the operation button 13 . Fig.19 It means in Fig.16 The state shown is a diagram of a state in which the operation button 13 is pressed in the right direction R.

[0189] When the operation button 13 is pressed, the engagement end 343 moves a maximum distance L5 in the right direction R. In this state, the position of the moving unit MV held by the lock member 34 is released, so that the moving unit MV can be moved in the rear direction Rr.

[0190] The maximum distance L5 is greater than the protruding height L3 of the vertical surface 211 of each engagement surface 210 except the engagement surface 210 closest to the front cover 11. The maximum distance L5 is preferably smaller than the protruding height L4 of the wall portion 213 in the rightward direction R.

[0191] By making the maximum distance L5 smaller than the protruding height L4, even when the operation button 13 is operated, the engagement end portion 343 can be clamped up and down by the pair of wall portions 213, so that the engagement end portion 343 can be stably moved relative to the mobile unit MV. In this way, even when the mobile unit MV is moved in the rearward direction Rr, the mobile unit MV can be stably moved.

[0192] In addition, the protrusion height of the vertical surface 211 of the engagement surface 210 located closest to the front cover 11 in the right direction R is preferably a value sufficiently greater than the maximum distance L5. Fig.15 Even when the operation button 13 is pressed in the state shown, the center guide member 20 can be prevented from moving in the rearward direction Rr.

[0193] Fig. 20 The diagram shows an operation button 13 , a central guide member 20 , and a support unit 30 in the headrest 100 , and is a diagram showing a state in which the moving unit MV is located at an initial position as viewed from above. Fig.21 1 is a diagram showing the operation button 13, the central guide member 20, and the support unit 30 in the headrest 100, and is a diagram showing a state where the mobile unit MV is located at the frontmost position as viewed from above. Fig.21 In FIG. 1 , the position of the support unit 30 in the state where the mobile unit MV is located at the initial position is indicated by a virtual line.

[0194] like Fig.21 As shown, the central guide member 20 can move a maximum distance L6 in the front-rear direction. The width of the contact portion 132 of the operation button 13 in the front-rear direction is a distance L7. And the distance L7 is greater than the distance L6.

[0195] Through such a structure, Fig. 20 and Fig.21 As shown, no matter where the movable unit MV is located in its movable range, the contact portion 132 and the flat plate portion 344 can overlap in the left-right direction. Therefore, no matter where the movable unit MV is located, the locking member 34 can be pressed to release the position of the movable unit MV. As a result, the structure of the operation button 13 can be simplified, and thus the manufacturing cost of the headrest 100 can be reduced.

[0196] Fig. 22 1 is a schematic diagram for explaining a preferred arrangement of the operation button 13 and the locking member 34, and is a diagram of the headrest 100 viewed from the front. Fig. 22 , a vertical center line C1 of the coil spring 345 that urges the locking member 34 in the left direction L and a vertical center line C2 of the contact portion 132 are shown. Fig. 22 In the example, center line C1 coincides with center line C2. Fig. 22 1 shows the center line C3 in the vertical direction of the spring 133 that urges the contact portion 132 and the operating member 131 in the left direction L. Fig. 22 The center line C4 of the vertical direction of the engagement end portion 343 is shown in FIG. Fig. 22 The maximum width AR of the operation button 13 in the vertical direction is shown in FIG. Fig. 22 As shown, the center lines C1, C2, C3, and C4 are all located between the two ends of the maximum width AR. With such an arrangement, the space in the storage member 10 can be effectively utilized.

[0197] In the description so far, one form of the headrest 100 is shown, but it is not limited to the figure and can be appropriately changed within the scope of the technical concept of the present invention. For example, the central guide member 20 is configured to be detachable relative to the front cover 11, but it can also be configured integrally with the front cover 11. In addition, the central guide member 20 may not be configured integrally with the front cover 11, but may be detachable relative to the rear cover 12 or configured integrally with the rear cover 12. In this case, the right guide member 11R and the left guide member 11L may also be provided on the rear cover 12.

[0198] In addition, the tension coil spring 50 is fixed to the protruding portion 23 of the center guide member 20, but may be fixed to the front cover 11. In addition, the tension coil spring 50 may be provided so as to connect the rear cover 12 and the protrusion 31A.

[0199] As described above, the following matters are disclosed in this specification. (1)

[0201] A headrest, comprising:

[0202] A support rod, the support rod being supported by a seat back of a vehicle seat;

[0203] a supporting unit, the supporting unit being supported by the strut; and

[0204] a moving unit configured to be movable in the front-rear direction of the vehicle seat relative to the supporting unit,

[0205] The moving unit comprises: a first accommodating member and a second accommodating member, the first accommodating member and the second accommodating member are arranged in parallel in the front-rear direction and form a space for accommodating the supporting unit; and a first guiding member separate from the first accommodating member, the first guiding member being configured as a column extending from the first accommodating member in the front-rear direction in the space,

[0206] The support unit has a first guide hole portion, through which the first guide member is inserted in a slidable manner to guide the moving unit to move in the front-rear direction.

[0207] The first storage member includes a support portion that supports the first guide member in a state of sandwiching a portion of a base end portion of the first storage member side of the first guide member in the front-rear direction.

[0208] According to (1), since the first guide member and the first storage member are separately formed, appropriate materials and strengths can be used for the first guide member and the first storage member, and the manufacturing cost can be reduced. In addition, since the first guide member is supported by the first storage member in a state where the movement in the forward and backward directions is restricted, the first guide member can be stably supported even when the moving unit moves in the forward and backward directions and generates an impact in the forward and backward directions. (2)

[0210] The headrest according to (1), wherein:

[0211] The first guide member has a flange portion at a base end portion on the first storage member side.

[0212] The support portion engages with a portion of the flange portion to support the first guide member.

[0213] According to (2), the first guide member can be supported by the first storage member by the engagement between the flange portion and the support portion, so that the first guide member can be easily assembled to the first storage member. (3)

[0215] The headrest according to (2), wherein:

[0216] The first guide member has a protrusion, and the protrusion protrudes from the flange toward an engagement direction between the flange and the support portion.

[0217] The first receiving member has an insertion portion into which the protrusion is inserted.

[0218] The protrusion has an engaged portion on a side surface in a direction intersecting with the protruding direction thereof.

[0219] The insertion portion is provided with an engaging portion that engages with the engaged portion.

[0220] According to (3), the first guide member can be firmly supported by the first storage member by the engagement of the engaged portion and the engaging portion. In addition, a click feeling can be provided by the engagement, and the first guide member can be efficiently assembled to the first storage member. (4)

[0222] The headrest according to (2) or (3), wherein:

[0223] A linear first protrusion extending in an engagement direction between the flange portion and the support portion and in contact with the flange portion is provided on a surface of the support portion facing the flange portion.

[0224] According to (4), the sliding resistance between the flange portion and the support portion can be reduced, so that the first guide member can be easily assembled with respect to the first storage member. In addition, the manufacturing variation of the components can be absorbed. (5)

[0226] The headrest according to any one of (1) to (4), wherein:

[0227] The first storage member has a columnar second guide member extending toward the second storage member.

[0228] The support unit has a second guide hole portion, through which the second guide member is inserted in a slidable manner to guide the moving unit to move in the front-rear direction.

[0229] A linear second protrusion extending in the front-rear direction is provided on an outer peripheral surface of the second guide member.

[0230] According to (5), the movement of the mobile unit can be guided by the first guide member and the second guide member, so that the mobile unit can be stably moved in the front-rear direction. In addition, the durability of the mobile unit can be improved. In addition, by providing a linear protrusion on the second guide member, the sliding resistance between the second guide member and the supporting unit can be reduced, so that the mobile unit can be smoothly moved. In addition, for example, in the case where a plurality of such linear protrusions are provided, dust can be guided between the protrusions, and the increase in sliding resistance caused by dust can be suppressed. (6)

[0232] The headrest according to any one of (1) to (5), wherein:

[0233] The first receiving member includes a first region having a first thickness and a second region having a second thickness greater than the first thickness.

[0234] The support portion is provided in the second region.

[0235] According to (6), the thickness of the second region supporting the first guide member is large, so even when an impact is applied to the second region from the outside, the support of the first guide member can be maintained, and durability can be improved.

Claims

1. A headrest, characterized in that: have: a stay rod supported by a seat back of a vehicle seat; a supporting unit, the supporting unit being supported by the support rod; as well as a moving unit configured to be movable in the front-rear direction of the vehicle seat relative to the supporting unit, The moving unit comprises: a first accommodating member and a second accommodating member, wherein the first accommodating member and the second accommodating member are arranged in parallel in the front-rear direction and form a space for accommodating the supporting unit; and a first guide member separate from the first receiving member, the first guide member being configured as a column extending from the first receiving member in the space in the front-rear direction, The support unit has a first guide hole portion through which the first guide member is inserted in a slidable manner to guide the moving unit to move in the front-rear direction. The first storage member includes a support portion that supports the first guide member in a state of sandwiching a portion of a base end portion of the first storage member side of the first guide member in the front-rear direction.

2. The headrest according to claim 1, characterized in that: The first guide member has a flange portion at a base end portion on the first storage member side. The support portion engages with a portion of the flange portion to support the first guide member.

3. The headrest according to claim 2, characterized in that: The first guide member has a protrusion that protrudes from the flange toward an engagement direction between the flange and the support portion. The first receiving member has an insertion portion into which the protrusion is inserted, The protrusion has an engaged portion on a side surface in a direction intersecting with the protruding direction thereof, The insertion portion is provided with an engaging portion that engages with the engaged portion.

4. The headrest according to claim 2 or 3, characterized in that: A linear first protrusion extending in an engagement direction between the flange portion and the support portion and in contact with the flange portion is provided on a surface of the support portion that faces the flange portion.

5. The headrest according to any one of claims 1 to 3, characterized in that: The first receiving part has a columnar second guide part extending toward the second receiving part. The support unit has a second guide hole portion through which the second guide member is inserted in a slidable manner to guide the movement unit to move in the front-rear direction. A linear second protrusion extending in the front-rear direction is provided on the outer peripheral surface of the second guide member.

6. The headrest according to any one of claims 1 to 3, characterized in that The first receiving member includes a first region with a first thickness and a second region with a second thickness greater than the first thickness. The support portion is disposed in the second region.

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