Holding mechanism of headrest of vehicle seat

Abstract

To provide a holding mechanism of a headrest of a vehicle seat which can hold a headrest support on a panel at lower costs while achieving simplification of attachment work.SOLUTION: A holding mechanism of a headrest of a vehicle seat includes: a panel 3 having an upper panel 20 which is formed with an upper insertion hole 21 and arranged parallel to an upper surface of the vehicle seat, and a lower panel 30 which is formed with a lower insertion hole 31 and arranged parallel to the upper panel 20; a headrest support unit 100 including a headrest support 120 into which a headrest stay is inserted, the headrest support unit 100 inserted into the upper insertion hole 21 and the lower insertion hole 31; an upper part removal prevention structure which is provided at an upper part of the headrest support unit 100 and contacts with the upper panel 20 to inhibit movement of the upper panel 20 in at least one of upward and downward directions; and a lower part removal prevention structure which is provided at a lower part of the headrest support unit 100 and contacts with the lower panel 30 to inhibit movement of the lower panel 30 in at least the other direction of the upward and downward directions.SELECTED DRAWING: Figure 3F

Description

[Technical Field]

[0001] The present invention relates to a headrest holding mechanism for a vehicle seat. [Background technology]

[0002] In a headrest retention mechanism for a vehicle seat, when a bracket into which a headrest support fitted with a headrest stay is inserted is welded to the upper frame of the vehicle seat, a raised back bead may form inside the bracket, potentially preventing the headrest stay and headrest support from fitting. Patent Document 1 discloses a headrest retention mechanism that includes an upper frame with an insertion hole formed therein, and a headrest support that is fixed to the upper frame by inserting it into the insertion hole and rotating it. The headrest retention mechanism in Patent Document 1 fixes the bracket to the upper frame without welding it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7207026 Summary of the Invention [Problem to be solved by the invention]

[0004] The headrest holding mechanism disclosed in Patent Document 1 has the problem that the headrest support is inserted into an insertion hole and rotated, which increases the number of installation steps, complicates the structure of the headrest support, and increases costs. Therefore, there is a need for a headrest holding mechanism for a vehicle seat that can hold the headrest support at a lower cost.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a headrest holding mechanism for a vehicle seat that can hold a headrest support to a panel with easier installation work and lower cost. [Means for solving the problem]

[0006] In order to achieve the above object, the headrest holding mechanism of the present invention for a vehicle seat comprises: a panel including an upper panel having a pair of upper insertion holes formed therein and parallel to an upper surface of the vehicle seat, and a lower panel having a pair of lower insertion holes formed therein and parallel to the upper panel; a pair of headrest support units including a headrest support into which a headrest stay is inserted, the headrest support units being inserted into the upper insertion hole and the lower insertion hole; an upper retaining structure provided on an upper portion of the headrest support unit, the upper retaining structure contacting the upper panel and suppressing movement in at least one direction in the vertical direction of the vehicle; a lower retaining structure provided at a lower portion of the headrest support unit, the lower retaining structure contacting the lower panel and suppressing movement in at least one of the up and down directions of the vehicle; Equipped with.

[0007] The headrest support unit includes a bracket into which a headrest support is inserted, The upper panel is provided with a first upper panel stopper that protrudes downward from an edge of the upper insertion hole, the upper retaining structure is a bracket upper hole formed in the bracket and into which a lower end of the first upper panel stopper is hooked, The first upper panel stopper may be engaged with the bracket upper hole to restrict vertical movement of the headrest support unit.

[0008] The headrest support unit includes a bracket into which a headrest support is inserted, a second upper panel stopper is formed on the upper panel and protrudes downward from an edge of the upper insertion hole; the upper retaining structure is a bracket upper stopper that protrudes from a side surface of the bracket and is retracted when the bracket is inserted downward into the upper insertion hole, The second upper panel stopper and the bracket upper stopper may come into contact with each other to restrict downward movement of the headrest support unit.

[0009] The headrest support unit includes a bracket into which a headrest support is inserted, The lower panel is provided with a lower panel stopper that protrudes downward from an edge of the upper insertion hole, the lower retaining structure is a lower end portion of the bracket, The lower panel stopper may be hooked onto a lower end of the bracket to prevent the headrest support unit from moving downward.

[0010] The headrest support unit includes a bracket into which a headrest support is inserted, The bracket has legs that protrude from the sides and extend downward, The lower panel is formed with grooves or openings into which the legs are inserted, the lower retaining structure is the leg of the bracket, The leg portion may be inserted into the groove or the opening in the lower panel to prevent the headrest support unit from moving downward.

[0011] The headrest support unit includes a bracket into which a headrest support is inserted, A bracket step is formed at the lower end of the bracket by cutting out the outer peripheral surface side, The bracket step may abut against an upper surface of the lower panel to suppress downward movement of the headrest support unit.

[0012] The headrest support is inserted into the upper insertion hole and the lower insertion hole, The upper portion retaining structure has a headrest support upper portion stopper formed on an upper portion of the headrest support, The headrest support upper stopper may protrude from the side of the headrest support, be retracted when inserted downward into the upper insertion hole, and abut against the lower surface of the upper panel when the headrest support moves upward to suppress movement.

[0013] The lower portion retaining structure has a first headrest support lower portion stopper formed on a lower portion of the headrest support, The first headrest support lower stopper may be retracted when inserted downward into the upper insertion hole and the lower insertion hole, and may abut against the lower surface of the lower panel when the headrest support moves upward, thereby suppressing movement.

[0014] The lower portion retaining structure has a second headrest support lower portion stopper formed on a lower portion of the headrest support, The second headrest support lower stopper may protrude from a side surface of the headrest support, and when pressed, retract and abut against an upper surface of the lower panel to prevent downward movement of the headrest support.

[0015] The headrest support is inserted into the upper insertion hole and the lower insertion hole, The headrest support may include a third headrest support lower stopper having a lower stopper portion formed at the lower part of the headrest support, protruding from a side surface of the headrest support, retracting when inserted downward into the upper insertion hole and the lower insertion hole, and abutting against the lower surface of the upper panel when the headrest support moves upward, to suppress movement; and an upper stopper portion protruding from the side surface of the headrest support, retracting when pressed, to abut against the upper surface of the lower panel when the headrest support moves downward, to suppress movement.

[0016] The headrest support is front and rear springs formed on the front and rear side surfaces of the headrest support and abutting against edges of the upper insertion hole and the lower insertion hole, respectively; left and right springs formed on the left and right side surfaces of the headrest support and abutting against edges of the upper insertion hole and the lower insertion hole, respectively; upper and lower springs formed on the side surfaces of the headrest support and in contact with the upper surface of the upper panel; may also be provided.

[0017] The headrest support may be provided on a side surface in the front-rear direction of the vehicle, and may have ribs with openings formed in positions on the sides of the front and rear springs. [Effects of the Invention]

[0018] In the headrest retention mechanism for a vehicle seat according to the present invention, the headrest support is retained to the panel by an upper anti-slip structure and a lower anti-slip structure. This vehicle seat headrest retention mechanism does not use a rotation process or structure. As a result, the vehicle seat headrest retention mechanism according to the present invention can retain the headrest support to the panel with easier installation and lower cost. [Brief explanation of the drawings]

[0019] [Figure 1]1 is a perspective view of a vehicle seat according to a first embodiment. [Figure 2] FIG. 3 is an exploded view of the holding mechanism of the headrest according to the first embodiment. [Figure 3A] 1(a) is a perspective view of a panel according to Embodiment 1. FIG. 1(b) is a right side view of the panel according to Embodiment 1. [Figure 3B] 1(a) is a plan view of a panel according to Embodiment 1, (b) is a front view of the panel according to Embodiment 1, and (c) is a rear view of the panel according to Embodiment 1. FIG. [Figure 3C] (a) is a perspective view of a panel into which a bracket according to embodiment 1 is inserted, (b) is a right side view of the panel into which a bracket according to embodiment 1 is inserted, and (c) is a left side view of the panel into which a bracket according to embodiment 1 is inserted. [Figure 3D] (a) is a plan view of a panel into which a bracket according to embodiment 1 is inserted, (b) is a front view of the panel into which a bracket according to embodiment 1 is inserted, and (c) is a rear view of the panel into which a bracket according to embodiment 1 is inserted. [Figure 3E] 4 is a cross-sectional view of a bracket inserted into a panel according to the first embodiment. FIG. [Figure 3F] 1(a) is a rear view of the vehicle seat according to the first embodiment, and FIG. 1(b) is a cross-sectional view of the holding mechanism of the headrest according to the first embodiment. [Figure 4] 1(a) is a perspective view of a left bracket according to Embodiment 1. FIG. 1(b) is a perspective view of a right bracket according to Embodiment 1. FIG. [Figure 5] 1(a) is a perspective view of a left headrest support according to Embodiment 1. FIG. 1(b) is a perspective view of a right headrest support according to Embodiment 1. FIG. [Figure 6A] 10(a) is a perspective view of a panel according to Embodiment 2. FIG. 10(b) is a right side view of the panel according to Embodiment 2. [Figure 6B]1(a) is a plan view of a panel according to Embodiment 2, (b) is a front view of the panel according to Embodiment 2, and (c) is a rear view of the panel according to Embodiment 2. FIG. [Figure 6C] (a) is a perspective view of a panel into which a bracket according to embodiment 2 is inserted, (b) is a right side view of the panel into which a bracket according to embodiment 2 is inserted, and (c) is a left side view of the panel into which a bracket according to embodiment 2 is inserted. [Figure 6D] 1(a) is a plan view of a panel into which a bracket according to embodiment 2 is inserted, (b) is a front view of a panel into which a bracket according to embodiment 2 is inserted, and (c) is a rear view of a panel into which a bracket according to embodiment 2 is inserted. [Figure 6E] FIG. 10 is a cross-sectional view of a bracket inserted into a panel according to the second embodiment. [Figure 6F] 10(a) is a rear view of a vehicle seat according to Embodiment 2. FIG. 10(b) is a cross-sectional view of a holding mechanism of a headrest according to Embodiment 2. FIG. [Figure 7] 10(a) is a perspective view of a left bracket according to Embodiment 2. FIG. 10(b) is a perspective view of a right bracket according to Embodiment 2. [Figure 8] 10(a) is a plan view of a panel according to embodiment 3, (b) is a bottom view of the panel according to embodiment 3, and (c) is a perspective view of the panel according to embodiment 3. FIG. [Figure 9] 10(a) is a perspective view of a left headrest support according to Embodiment 3. FIG. 10(b) is a perspective view of a right headrest support according to Embodiment 3. FIG. [Figure 10A] 10(a) is an enlarged view of an upper portion retaining structure for a headrest support according to Embodiment 3. FIG. 10(b) is an enlarged view of a lower portion retaining structure for a headrest support according to Embodiment 3. [Figure 10B] 10(a) is a side cross-sectional view of a headrest support inserted into a panel according to embodiment 3. FIG. 10(b) is a cross-sectional view of a headrest support inserted into a panel according to embodiment 3. [Figure 10C] 10(a) is a cross-sectional view of an upper portion of a headrest support retaining structure according to Embodiment 3. FIG. 10(b) is a cross-sectional view of a lower portion of a headrest support retaining structure according to Embodiment 3. [Figure 11] 10(a) is a plan view of a panel according to embodiment 4, (b) is a bottom view of the panel according to embodiment 4, and (c) is a perspective view of the panel according to embodiment 4. FIG. [Figure 12] 10(a) is a perspective view of a left headrest support according to embodiment 4. FIG. 10(b) is a perspective view of a right headrest support according to embodiment 4. FIG. [Figure 13A] 10(a) is an enlarged view of an upper portion retaining structure for a headrest support according to Embodiment 4. FIG. 10(b) is an enlarged view of a lower portion retaining structure for a headrest support according to Embodiment 4. [Figure 13B] 10(a) is a side cross-sectional view of a headrest support inserted into a panel according to embodiment 4. FIG. 10(b) is a cross-sectional view of a headrest support inserted into a panel according to embodiment 4. [Figure 13C] 10(a) is a cross-sectional view of an upper portion of a headrest support retaining structure according to Embodiment 4. FIG. 10(b) is a cross-sectional view of a lower portion of a headrest support retaining structure according to Embodiment 4. FIG. [Figure 14] 10(a) is a perspective view of a left headrest support according to Embodiment 5. FIG. 10(b) is a perspective view of a right headrest support according to Embodiment 5. FIG. [Figure 15A] 10(a) is an enlarged view of an upper portion retaining structure for a headrest support according to Embodiment 5. FIG. 10(b) is an enlarged view of a lower portion retaining structure for a headrest support according to Embodiment 5. [Figure 15B] 10(a) is a side cross-sectional view of a headrest support inserted into a panel according to embodiment 5. FIG. 10(b) is a cross-sectional view of a headrest support inserted into a panel according to embodiment 5. [Figure 15C]10(a) is a cross-sectional view of an upper portion of a headrest support retaining structure according to Embodiment 5. FIG. 10(b) is a cross-sectional view of a lower portion of a headrest support retaining structure according to Embodiment 5. [Figure 16] 13(a) is a perspective view of a left headrest support according to Embodiment 6. FIG. 13(b) is a perspective view of a right headrest support according to Embodiment 6. FIG. [Figure 17A] 13(a) is a plan view of a panel for a headrest support according to Embodiment 6. FIG. 13(b) is a bottom view of the panel for a headrest support according to Embodiment 6. FIG. [Figure 17B] 10(a) is a perspective view of a panel for a headrest support according to a seventh embodiment, and FIG. 10(b) is a perspective view of a panel for a headrest support according to an eighth embodiment. [Figure 18] FIG. 10 is a diagram showing a combination of structures according to first to eighth embodiments. [Figure 19] 1(a) is an enlarged view (part 1) of a lower retaining structure of a modified example of the bracket according to the first and second embodiments. FIG. 1(b) is an enlarged view (part 2) of a lower retaining structure of a modified example of the bracket according to the first and second embodiments. FIG. 1(c) is a diagram showing a combination of modified examples of the bracket according to the first and second embodiments. [Figure 20] 1(a) is a perspective view of a first modified example of a panel according to embodiments 3 to 5. FIG. 1(b) is a rear view of the first modified example of a panel according to embodiments 3 to 5. FIG. 1(c) is a diagram showing a combination of modified examples of panels according to embodiments 3 to 5 and embodiments 6 to 8. [Figure 21] 1(a) is a perspective view of a second modified example of a panel according to embodiments 3 to 5. FIG. 1(b) is a rear view of a second modified example of a panel according to embodiments 3 to 5. FIG. 1(c) is a front view of a second modified example of a panel according to embodiments 3 to 5. [Figure 22] 10(a) is a rear view of the headrest support of the third embodiment inserted into the second modified panel, and FIG. 10(b) is a cross-sectional view of the headrest support of the third embodiment inserted into the second modified panel. [Figure 23]1(a) is a left cross-sectional view of the headrest support of the third embodiment inserted into the second modified panel, and FIG. 1(b) is a right side view of the headrest support of the third embodiment inserted into the second modified panel. [Figure 24] 1(a) is a rear view (part 1) of the headrest support of the third embodiment inserted into the second modified panel; and FIG. 1(b) is a rear view (part 2) of the headrest support of the third embodiment inserted into the second modified panel. [Figure 25] 1(a) is a left cross-sectional view of the headrest support of the third embodiment inserted into the first modified panel, and FIG. 1(b) is a cross-sectional view of the headrest support of the third embodiment inserted into the first modified panel. [Figure 26] 1(a) is a cross-sectional view of the upper retaining structure for the headrest support inserted into the first modified panel, and FIG. 1(b) is a cross-sectional view of the lower retaining structure for the headrest support inserted into the first modified panel. [Figure 27] 10(a) is a left cross-sectional view of the headrest support of the third embodiment inserted into the second modified panel, and FIG. 10(b) is a cross-sectional view of the headrest support of the third embodiment inserted into the second modified panel. [Figure 28] 10(a) is a cross-sectional view of the upper retaining structure of the headrest support inserted into the modified panel 2. FIG. 10(b) is a cross-sectional view of the lower retaining structure of the headrest support inserted into the modified panel 2. DETAILED DESCRIPTION OF THE INVENTION

[0020] Embodiment 1 Hereinafter, a headrest holding mechanism according to an embodiment of the present invention will be described with reference to the drawings. For ease of understanding, XYZ coordinates will be set and referenced as appropriate.

[0021] 1 and 2, the headrest holding mechanism 2 of the vehicle seat 1 is used to hold the headrest A and the headrest stay B in the vehicle seat 1. The direction toward the front side of the vehicle seat 1 (-Y direction) is the forward direction, the direction toward the rear side of the vehicle seat 1 (+Y direction) is the rearward direction, the left-right direction (X-axis direction) in a rear view seen from the rear side (+Y side) of the vehicle seat 1 is the left-right direction, and the up-down direction of the vehicle seat 1 (Z-axis direction) is the up-down direction. The headrest holding mechanism 2 of the vehicle seat 1 includes a panel 3 and a headrest support unit 100.

[0022] The panel 3 is an upper portion of the upper frame C of the vehicle seat 1. The panel 3 has a front panel 10, an upper panel 20, and a lower panel 30, as shown in FIGS.

[0023] The front panel 10 is a plate that supports the backrest portion of the vehicle seat 1. The front panel 10 is approximately parallel to the XZ plane.

[0024] The upper panel 20 is a plate extending from the front panel 10 toward the rear of the vehicle. The upper panel 20 is formed horizontally from the top of the front panel 10 toward the rear. The upper panel 20 is approximately parallel to the upper surface of the vehicle seat 1. The upper panel 20 is approximately parallel to the XY plane. The rear end of the upper panel 20 is rolled up to form a rolled-up portion 20a. The rolled-up portion 20a of the upper panel 20 functions as a rib that reinforces the upper panel 20. The upper panel 20 is formed with an upper insertion hole 21, a guide plate 22, and a first upper panel stopper 23.

[0025] The upper insertion hole 21 is a hole for inserting the headrest support unit 100. A pair of upper insertion holes 21 is formed in the upper panel 20. The pair of upper insertion holes 21 are formed in a row in the left-right direction of the upper panel 20 in a plan view. The upper insertion holes 21 are rectangular holes. However, this is not limited to this. The shape of the upper insertion hole 21 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 100. The size of the upper insertion hole 21 is larger than the size of the cross-section of the headrest support unit 100 in a plan view.

[0026] The guide plates 22 are plates that guide the headrest support unit 100 downward when it is inserted into the upper insertion hole 21. The guide plates 22 are a pair of plates extending from the edges of the upper insertion hole 21. The pair of guide plates 22 each extend from the front-to-rear edges of the upper insertion hole 21. The guide plates 22 extend from the edges of the upper insertion hole 21 toward the center of the upper insertion hole 21, and then bend and extend downward. The width between the upper ends of the pair of guide plates 22 is a length that allows the headrest support unit 100 to be inserted.

[0027] The first upper panel stopper 23 is a resilient hooking claw that can be hooked onto the headrest support unit 100. The first upper panel stopper 23 is a pair of portions extending from the edge of the upper insertion hole 21. The pair of first upper panel stoppers 23 extend from the left and right edges of the upper insertion hole 21, respectively. The first upper panel stopper 23 extends from the edge of the upper insertion hole 21 toward the center of the upper insertion hole 21, bends and extends downward, and its lower end bends and further extends toward the center of the upper insertion hole 21. The width between the upper ends of the pair of first upper panel stoppers 23 is a length that allows the headrest support unit 100 to be inserted.

[0028] The lower panel 30 is a plate extending from the front panel 10 toward the rear of the vehicle. The lower panel 30 is formed horizontally from the lower part of the front panel 10 toward the rear. The lower panel 30 is approximately parallel to the upper panel 20. The lower panel 30 is approximately parallel to the XY plane. The rear end of the lower panel 30 is rolled down to form a rolled-down portion 30a. The rolled-down portion 30a of the lower panel 30 functions as a rib that reinforces the lower panel 30. A lower insertion hole 31 and a lower panel stopper 32 are formed in the lower panel 30.

[0029] The lower insertion holes 31 are holes for inserting the headrest support unit 100. A pair of lower insertion holes 31 are formed in the lower panel 30. The lower insertion holes 31 are formed in a row in the left-right direction of the lower panel 30 in a plan view. The lower insertion holes 31 are formed in a position directly below the upper insertion holes 21. The lower insertion holes 31 are rectangular holes. However, this is not limited to this. The shape of the lower insertion holes 31 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 100. The size of the lower insertion holes 31 is larger than the cross-sectional size of the headrest support unit 100 in a plan view.

[0030] The lower panel stoppers 32 are claws that are hooked onto the headrest support unit 100. The lower panel stoppers 32 are four parts that extend from the edge of the lower insertion hole 31. A pair of lower panel stoppers 32 extend from each of the four edges of the lower insertion hole 31. The lower panel stoppers 32 extend from the edge of the lower insertion hole 31 toward the center of the lower insertion hole 31, then bend and extend downward, forming a claw-like shape.

[0031] The headrest support unit 100 is a component attached to the headrest stay B of the headrest A. The headrest support unit 100 is inserted into the upper insertion hole 21 and the lower insertion hole 31 of the panel 3 to fix the headrest stay B to the panel 3. The headrest support unit 100 has a bracket 110 and a headrest support 120.

[0032] The brackets 110 are two components that are inserted into the two upper insertion holes 21 and the two lower insertion holes 31 of the panel 3, respectively. The brackets 110 are substantially rectangular prisms in plan view. However, this is not limiting. The brackets 110 may have any shape that allows them to be inserted into the two upper insertion holes 21 and the two lower insertion holes 31 of the panel 3. The brackets 110 can be inserted into the upper end portions of the lower panel stoppers 32. The brackets 110 are hooked onto the claws of the lower panel stoppers 32. As shown in FIGS. 3A to 3F, 4, and 5, the brackets 110 are formed with first through-holes 110a that penetrate the brackets 110 in the vertical direction and into which the headrest supports 120 are inserted. The lower end portions 110b of the brackets 110 abut against the lower end portions of the four lower panel stoppers 32, preventing the headrest support unit 100 from moving downward. The lower end 110b of the bracket 110 constitutes a lower retaining structure provided at the lower part of the headrest support unit 100. The bracket 110 is formed with a bracket upper hole 111 and a fitting groove 112. However, this is not limited to this. The bracket 110 may further be provided with, for example, a groove or opening for positioning.

[0033] The bracket upper hole 111 is a square hole formed on the left and right side surfaces of the bracket 110. The bracket upper hole 111 is formed in the upper part of the bracket 110. The lower end of the first upper panel stopper 23 of the upper panel 20 is hooked into the bracket upper hole 111. The bracket upper hole 111 engages with the first upper panel stopper 23 and prevents the headrest support unit 100 from moving in the up and down direction. The bracket upper hole 111 constitutes an upper removal prevention structure provided on the upper part of the headrest support unit 100.

[0034] The fitting grooves 112 are grooves formed in the upper ends of the two brackets 110. The fitting grooves 112 are formed on the rear sides of the brackets 110. When viewed from behind, the fitting grooves 112 are formed closer to the left in the left bracket 110 and closer to the right in the right bracket 110.

[0035] The headrest support 120 is attached to the headrest stay B. A pair of headrest supports 120 are attached in the left-right direction when viewed from behind. The headrest support 120 includes a headrest support head portion 121, a body portion 122, a fitting protrusion 123, an upper and lower spring 124, a front and rear spring 125, and a left and right spring 126. The headrest support 120 is formed with a second through hole 120a that penetrates the headrest support 120 in the up-down direction and into which the headrest stay B is inserted. The second through hole 120a of the headrest support 120 penetrates the headrest support head portion 121 and the body portion 122.

[0036] The headrest support head 121 is the upper end of the headrest support 120. The headrest support head 121 is a substantially rectangular portion in a plan view. The size of the headrest support head 121 is larger than the size of the upper insertion hole 21 in a plan view. The headrest support head 121 of the headrest support 120 on the left side in a rear view further includes an unlock button 121a. The headrest support head 121 of the headrest support 120 on the left side in a rear view incorporates a locking structure that locks the headrest stay B to prevent it from coming off when the headrest stay B is inserted into the second through-hole 120a.

[0037] The unlock button 121a is a button that unlocks the headrest stay B locked by the locking structure. The unlock button 121a releases the lock while it is pressed.

[0038] The body portion 122 is a portion below the headrest support head portion 121 of the headrest support 120. The body portion 122 is a portion that is approximately rectangular in plan view. However, this is not limited to this. The body portion 122 may have any shape as long as it can be inserted into the first through hole 110a of the bracket 110. The size of the body portion 122 is such that it can pass between the lower ends of the lower panel stoppers 32 in plan view. The vertical length of the body portion 122 is longer than the vertical length of the bracket 110. A groove into which the upholstery of the vehicle seat 1 is fitted is formed at the upper end of the body portion 122.

[0039] The fitting protrusions 123 are protrusions formed on the respective side surfaces of the two headrest supports 120. The fitting protrusions 123 are formed on the rear side of the headrest support 120. The fitting protrusions 123 are formed in a shape and position that allows them to fit into the fitting grooves 112 of the bracket 110.

[0040] The vertical springs 124 are elastic pieces that absorb pressure or vibration in the vertical direction. The vertical springs 124 are provided near the head 121 of the headrest support. The vertical springs 124 protrude from the side surfaces of the headrest support 120 and abut against the upper end of the bracket 110. When pressure or vibration is applied to the bracket 110 or the headrest support 120 in the vertical direction, the vertical springs 124 absorb and suppress the pressure or vibration of the bracket 110 or the headrest support 120 in the vertical direction.

[0041] The front and rear springs 125 are elastic parts that absorb pressure or vibration in the front and rear direction. The front and rear springs 125 are provided on the front and rear side surfaces of the headrest support 120, respectively. The front and rear springs 125 protrude from the side surfaces of the headrest support 120 and abut against the front and rear inner walls of the bracket 110. When pressure or vibration is applied to the bracket 110 or the headrest support 120 in the front and rear direction, the front and rear springs 125 absorb and suppress the pressure or vibration in the front and rear direction of the bracket 110 or the headrest support 120.

[0042] The left and right springs 126 are elastic parts that absorb pressure or vibration in the left and right direction. The left and right springs 126 are provided on the left and right side surfaces of the headrest support 120, respectively. The left and right springs 126 protrude from the side surfaces of the headrest support 120 and abut against the left and right inner walls of the bracket 110. When pressure or vibration is applied to the bracket 110 or the headrest support 120 in the left and right direction, the left and right springs 126 absorb and suppress the pressure or vibration in the left and right direction of the bracket 110 or the headrest support 120.

[0043] Next, a method for installing the headrest holding mechanism 2 of the vehicle seat 1 will be described.

[0044] First, the two headrest supports 120 are aligned so that the fitting protrusions 123 of the two headrest supports 120 fit into the fitting grooves 112 of the two brackets 110. Then, the two headrest supports 120 are inserted into the first through holes 110a of the two brackets 110, respectively, and the fitting protrusions 123 fit into the fitting grooves 112. As a result, the headrest support unit 100 is formed as shown in FIG. 3F(b). The lower end of the headrest support 120 protrudes from the lower end of the bracket 110.

[0045] Next, as shown in Fig. 2, the headrest stay B is inserted into the second through-hole 120a of the headrest support 120 of the headrest support unit 100. At this time, the headrest support 120 having the lock release button 121a is inserted into the left headrest stay B when viewed from behind. The lower end of the headrest stay B protrudes from the lower end of the headrest support 120.

[0046] Finally, the headrest support unit 100 with the headrest stay B inserted therein is fixed to the panel 3. Specifically, as shown in FIGS. 2 and 3A to 3F, the bracket 110 of the headrest support unit 100 is guided by the guide plate 22 of the upper panel 20 and inserted into the upper insertion hole 21 of the upper panel 20. Furthermore, the headrest support unit 100 is inserted into the lower insertion hole 31, and the headrest support unit 100 is inserted until the bracket upper hole 111 of the bracket 110 is caught on the first upper panel stopper 23 of the upper panel 20 and the lower end portion 110b of the bracket 110 abuts against the lower panel stopper 32 of the lower panel 30. The bracket upper hole 111 constitutes an upper retaining structure for the headrest support unit 100, and the lower end portion 110b constitutes a lower retaining structure for the headrest support unit 100. The lower end of the headrest support 120 of the headrest support unit 100 protrudes downward beyond the lower panel stopper 32 of the lower panel 30 in rear view. As a result, the headrest support unit 100 is fixed to the panel 3.

[0047] In the headrest holding mechanism 2 of the vehicle seat 1 according to the first embodiment, the headrest support unit 100 is prevented from moving up and down by the upper and lower anti-slip structures. Furthermore, when the headrest support unit 100 moves in the front-rear or left-right directions, it comes into contact with the edges of the upper insertion hole 21 and the lower insertion hole 31 of the panel 3, thereby preventing movement in the front-rear and left-right directions. As a result, the bracket 110 of the headrest support unit 100 is fixed by insertion without welding to the panel 3, and no wavy beads are generated by welding. Therefore, in the headrest holding mechanism 2 of the vehicle seat 1, the headrest support 120 can be held to the panel 3 with easier installation and at lower cost.

[0048] Embodiment 2 In the first embodiment described above, the headrest support unit 100 is prevented from moving up and down by the engagement of the first upper panel stopper 23 of the upper panel 20 with the bracket upper hole 111 of the bracket 110. However, this is not limited to this. As shown in FIGS. 6A to 6F and 7, the headrest support unit 100 is prevented from moving downward by the lower end 110b of the bracket 110 abutting against the lower panel stopper 32. Therefore, it is sufficient if the headrest support unit 100 is prevented from moving upward. The headrest support unit 100 may also be prevented from moving upward by the abutment of the second upper panel stopper 24 formed on the upper panel 20 with the bracket upper stopper 113 formed on the bracket 110. The following mainly describes the differences from the first embodiment. Other than the differences described above, the present embodiment is considered to be the same or equivalent to the first embodiment.

[0049] The upper panel 20 according to the second embodiment is formed with an upper insertion hole 21, a guide plate 22, and a second upper panel stopper 24. The upper insertion hole 21 and the guide plate 22 of the upper panel 20 are the same as those of the first embodiment.

[0050] The second upper panel stoppers 24 are a pair of tongue-shaped portions extending from the edges of the upper insertion hole 21. The pair of second upper panel stoppers 24 extend from the left and right edges of the upper insertion hole 21. The second upper panel stoppers 24 extend from the edges of the upper insertion hole 21 toward the center of the upper insertion hole 21, then bend and extend downward.

[0051] Bracket 110 according to the second embodiment is formed with fitting groove 112 and bracket upper stopper 113. Fitting groove 112 of bracket 110 is the same as that of the first embodiment.

[0052] The bracket upper stoppers 113 are a pair of elastic valves formed to protrude from the side surfaces of the bracket 110. The pair of bracket upper stoppers 113 protrude from the left and right side surfaces of the bracket 110, respectively. The strength and elasticity of the bracket upper stoppers 113 can be changed by changing the width in the front-to-rear direction, and the strength of the bracket upper stoppers 113 can be adjusted so that it is lower than the strength of the second upper panel stopper 24. Each of the pair of bracket upper stoppers 113 is formed with an inclined surface 113a and a tip portion 113b.

[0053] The inclined surface 113a is a surface that tapers downward when viewed from behind. When the headrest support unit 100 is inserted into the upper insertion hole 21, the inclined surface 113a is pressed against the edge of the upper insertion hole 21. As a result, the pressure received by the inclined surface 113a causes the bracket upper stopper 113 to be pulled in so as to be approximately flush with the side surface of the bracket 110.

[0054] The tip portions 113b are upper ends of the bracket upper stoppers 113. The pair of tip portions 113b abut against the lower ends of the pair of second upper panel stoppers 24, respectively, and suppress upward movement of the bracket 110 of the headrest support unit 100.

[0055] In the headrest holding mechanism 2 of the vehicle seat 1 according to the second embodiment, the second upper panel stopper 24 abuts against the bracket upper stopper 113, preventing the headrest support unit 100 from moving upward. The bracket upper stopper 113 constitutes a structure for preventing the upper part of the headrest support unit 100 from coming off. As a result, the bracket 110 of the headrest support unit 100 is fixed by inserting it into the panel 3 without welding, and no wavy beads are created by welding. Therefore, in the headrest holding mechanism 2 of the vehicle seat 1, the headrest support 120 can be held to the panel 3 with easier installation and at lower cost.

[0056] Embodiment 3 In the first embodiment described above, the headrest support unit 100 includes a bracket 110, and the bracket 110 is fixed to the panel 3. However, this is not limited to this. The headrest support unit 200 may have the headrest support 210 fixed to the panel 4. The headrest support unit 200 may not have a bracket. In the automotive industry, with the shift to EVs, there has been a trend toward reducing the number of parts, weight, and costs. Therefore, there has been a demand to eliminate the bracket. The following mainly describes the differences from the first embodiment. Other than the differences described, the present embodiment is the same or equivalent to the first embodiment.

[0057] The headrest holding mechanism 2 of the vehicle seat 1 according to the third embodiment includes a panel 4 and a headrest support unit 200, as shown in FIGS. 8, 9, and 10A to 10C.

[0058] The panel 4 is an upper frame of the vehicle seat 1. The panel 4 has a front panel 10, an upper panel 40, and a lower panel 50. The front panel 10 of the panel 4 is the same as that in the first embodiment.

[0059] The upper panel 40 is a plate extending from the front panel 10 toward the rear of the vehicle. The upper panel 40 is formed horizontally from the top of the front panel 10 toward the rear. The upper panel 40 is approximately parallel to the upper surface of the vehicle seat 1. The upper panel 40 is approximately parallel to the XY plane. The rear end of the upper panel 40 is rolled up to form a rolled-up portion 40a. The rolled-up portion 40a of the upper panel 40 functions as a rib that reinforces the upper panel 40. An upper insertion hole 41 is formed in the upper panel 40.

[0060] The upper insertion hole 41 is a hole for inserting the headrest support unit 200. A pair of upper insertion holes 41 is formed in the upper panel 40. The pair of upper insertion holes 41 are formed in a row in the left-right direction of the upper panel 40 in a plan view. The upper insertion holes 41 are rectangular holes. However, this is not limited to this. The shape of the upper insertion hole 41 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 200. The size of the upper insertion hole 41 is larger than the size of the cross-section of the headrest support unit 200 in a plan view.

[0061] The lower panel 50 is a plate extending from the front panel 10 toward the rear of the vehicle. The lower panel 50 is formed horizontally from the lower part of the front panel 10 toward the rear. The lower panel 50 is approximately parallel to the upper panel 40. The lower panel 50 is approximately parallel to the XY plane. The rear end of the lower panel 50 is rolled down to form a rolled-down portion 50a. The rolled-down portion 50a of the lower panel 50 functions as a rib that reinforces the lower panel 50. A lower insertion hole 51 is formed in the lower panel 50.

[0062] The lower insertion holes 51 are holes for inserting the headrest support unit 200. A pair of lower insertion holes 51 are formed in the lower panel 50. The lower insertion holes 51 are formed in a row in the left-right direction of the lower panel 50 in a plan view. The lower insertion holes 51 are formed in a position directly below the upper insertion holes 41. The lower insertion holes 51 are rectangular holes. However, this is not limited to this. The shape of the lower insertion holes 51 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 200. The size of the lower insertion holes 51 is larger than the cross-sectional size of the headrest support unit 200 in a plan view.

[0063] The headrest support unit 200 is inserted into the upper insertion hole 41 and the lower insertion hole 51 of the panel 4 to fix the headrest stay B to the panel 4. The headrest support unit 200 has a headrest support 210.

[0064] A pair of headrest supports 210 are attached in the left-right direction when viewed from behind. The headrest support 210 includes a headrest support head portion 121, a body portion 122, upper and lower springs 213, front and rear springs 214, left and right springs 215, a headrest support upper stopper 216, and a first headrest support lower stopper 217. The headrest support 210 is formed with a second through hole 120a that penetrates the headrest support 210 in the up-down direction and into which the headrest stay B is inserted. The second through hole 120a of the headrest support 210 penetrates the headrest support head portion 121 and the body portion 122. A support step 210b is formed on the side of the upper portion of the headrest support 210. The support step 210b of the headrest support 210 abuts against the upper surface of the upper panel 40 and prevents the headrest support 210 from moving downward.

[0065] The headrest support head 121, body 122, and second through-hole 120a of the headrest support 210 are the same as those in the first embodiment.

[0066] The vertical springs 213 are elastic pieces that absorb pressure or vibration in the vertical direction. The vertical springs 213 are provided in positions that contact the edges of the upper insertion holes 41 of the upper panel 40. The vertical springs 213 are provided on the front side of the headrest support 210. The vertical springs 213 protrude from the sides of the headrest support 210 and abut against the upper surface of the upper panel 40. When pressure or vibration is applied to the headrest support 210 in the vertical direction, the vertical springs 213 absorb and suppress the pressure or vibration in the vertical direction of the headrest support 210. The vertical springs 213 suppress upward movement of the headrest support 210.

[0067] The front and rear springs 214 are elastic parts that absorb pressure or vibration in the front and rear direction. The front and rear springs 214 are provided at the upper and lower parts of the front and rear side surfaces of the headrest support 210. The upper front and rear spring 214 protrudes from the side surface of the headrest support 210 and is provided in a position where it contacts the edge of the upper insertion hole 41. The lower front and rear spring 214 protrudes from the side surface of the headrest support 210 and is provided in a position where it contacts the edge of the lower insertion hole 51. When pressure or vibration is applied to the headrest support 210 in the front and rear direction, the front and rear springs 214 absorb and suppress the pressure or vibration in the front and rear direction of the headrest support 210.

[0068] The left and right springs 215 are elastic parts that absorb pressure or vibration in the left and right direction. The left and right springs 215 are provided at the upper and lower parts of the left and right side surfaces of the headrest support 210, respectively. The upper left and right springs 215 protrude from the side surfaces of the headrest support 210 and are provided at a position that contacts the edge of the upper insertion hole 41. The lower left and right springs 215 protrude from the side surfaces of the headrest support 210 and are provided at a position that contacts the edge of the lower insertion hole 51. The left and right springs 215 absorb and suppress the pressure or vibration of the headrest support 210 when pressure or vibration is applied in the left and right direction. The upper left and right springs 215 and the lower left and right springs 215 are formed biased to either the left or right in a side view. The left and right springs 215 are formed with upper legs 215a, lower legs 215b, and flat portions 215c. However, the invention is not limited to this, and the left and right springs 215 may be any springs as long as they can absorb and suppress pressure or vibration in the left and right direction.

[0069] The upper leg portions 215a are portions formed on the upper portions of the left and right springs 215. The upper leg portions 215a have an arched shape.

[0070] The lower leg portions 215b are portions formed at the lower portions of the left and right springs 215. The lower leg portions 215b have an arched shape.

[0071] The flat surface portion 215c is a portion that contacts the edge of the upper insertion hole 41 or the lower insertion hole 51. The flat surface portion 215c is formed between the upper leg portion 215a and the lower leg portion 215b. The flat surface portion 215c is a substantially rectangular portion in a side view.

[0072] The headrest support upper stoppers 216 are a pair of elastic valves formed to protrude from the side surfaces of the headrest support 210. The pair of headrest support upper stoppers 216 protrude from the left and right side surfaces of the headrest support 210, respectively. The headrest support upper stoppers 216 are formed at the top of the headrest support 210. The headrest support upper stoppers 216 are provided in a position that contacts the lower surface of the upper panel 40. The amount by which the headrest support upper stoppers 216 protrude from the side surfaces is smaller than the amount by which the upper and lower springs 213 protrude from the side surfaces. The headrest support upper stoppers 216 are each formed with an inclined surface 216a of the headrest support upper stopper 216 and a tip end 216b of the headrest support upper stopper 216.

[0073] The inclined surface 216a of the headrest support upper stopper 216 is a surface that is inclined so as to taper downward when viewed from behind. When the headrest support 210 is inserted into the upper insertion hole 41, the inclined surface 216a of the headrest support upper stopper 216 is pressed against the edge of the upper insertion hole 41. As a result, the pressure received by the inclined surface 216a of the headrest support upper stopper 216 causes the headrest support upper stopper 216 to be pulled in so as to be approximately flush with the side surface of the headrest support 210.

[0074] The tip 216b of the headrest support upper stopper 216 is the upper end of the headrest support upper stopper 216. The tip 216b of the headrest support upper stopper 216 abuts against the lower surface of the upper panel 40, and prevents the headrest support 210 of the headrest support unit 200 from moving upward.

[0075] The first headrest support lower stoppers 217 are a pair of elastic valves formed to protrude from the side surfaces of the headrest support 210. The pair of first headrest support lower stoppers 217 protrude from the left and right side surfaces of the headrest support 210, respectively. The first headrest support lower stoppers 217 are formed in the lower part of the headrest support 210. The first headrest support lower stoppers 217 are provided in a position where they come into contact with the lower surface of the lower panel 50. The first headrest support lower stoppers 217 are each formed with an inclined surface 217a of the first headrest support lower stopper 217 and a tip end portion 217b of the first headrest support lower stopper 217.

[0076] The inclined surface 217a of the first headrest support lower stopper 217 is a surface that is inclined so as to taper downward when viewed from behind. When the headrest support 210 is inserted into the upper insertion hole 41 and the lower insertion hole 51, the inclined surface 217a of the first headrest support lower stopper 217 is pressed against the edges of the upper insertion hole 41 and the lower insertion hole 51. As a result, the pressure received by the inclined surface 217a of the first headrest support lower stopper 217 causes the first headrest support lower stopper 217 to be pulled in so as to be approximately flush with the side surface of the headrest support 210.

[0077] A tip end 217b of the first headrest support lower stopper 217 is formed at the upper end of the first headrest support lower stopper 217. The tip end 217b of the first headrest support lower stopper 217 abuts against the lower surface of the lower panel 50, and prevents the headrest support 210 of the headrest support unit 200 from moving upward.

[0078] The upper left and right springs 215 and headrest support upper stopper 216, and the lower left and right springs 215 and first headrest support lower stopper 217 are aligned in the left-right direction in a side view. The upper left and right springs 215 are formed to the left of the headrest support upper stopper 216 in a left side view, and the lower left and right springs 215 are formed to the right of the first headrest support lower stopper 217 in a side view. However, this is not limited to this. For example, the upper left and right springs 215 may be formed to the right of the headrest support upper stopper 216 in a side view, and the lower left and right springs 215 may be formed to the left of the first headrest support lower stopper 217 in a left side view. The upper left and right springs 215 and the lower left and right springs 215 may be formed, for example, on the right side of the upper left and right springs 215 and the lower left and right springs 215 of both the headrest support upper stopper 216 and the first headrest support lower stopper 217, or on the left side of the upper left and right springs 215 and the lower left and right springs 215 of both the headrest support upper stopper 216 and the first headrest support lower stopper 217.

[0079] In the headrest holding mechanism 2 of the vehicle seat 1 according to the third embodiment, the support step 210b of the headrest support 210 and the headrest support upper stopper 216 constitute an upper anti-slip structure, and the first headrest support lower stopper 217 constitutes a lower anti-slip structure. However, this is not limited to this. A stopper that suppresses vertical movement of the headrest support 210 may be provided in addition to the support step 210b of the headrest support 210, the headrest support upper stopper 216, and the first headrest support lower stopper 217.

[0080] In the headrest holding mechanism 2 of the vehicle seat 1 according to the third embodiment, the movement of the headrest support 210 is suppressed by inserting the headrest support 210 into the upper insertion hole 41 of the upper panel 40 and the lower insertion hole 51 of the lower panel 50. However, this is not limited to this. Furthermore, the movement of the headrest support 210 may be suppressed by rotating the headrest support 210 after inserting it into the upper insertion hole 41 of the upper panel 40 and the lower insertion hole 51 of the lower panel 50.

[0081] In the headrest holding mechanism 2 for the vehicle seat 1 according to the third embodiment, the headrest support 210 is provided with an upper anti-slip structure and a lower anti-slip structure, and vertical movement is suppressed. As a result, the headrest support unit 200 is fixed to the panel 4 by inserting it without welding, and no wavy beads are generated by welding. Therefore, the headrest holding mechanism 2 for the vehicle seat 1 can hold the headrest support 210 to the panel 4 with easier installation work and at lower cost. Furthermore, in the headrest holding mechanism 2 for the vehicle seat according to the third embodiment, eliminating the brackets allows for further weight reduction, fewer parts, and cost reduction.

[0082] Embodiment 4 In the above-described third embodiment, the first headrest support lower stopper 217, which is a lower portion prevention structure, prevents the headrest support 210 from moving upward. However, this is not limited to this. The second headrest support lower stopper 317, which is a lower portion prevention structure, may also prevent the headrest support 310 from moving downward. The following mainly describes the differences from the third embodiment. Other than the differences described, the present embodiment is the same as or equivalent to the third embodiment.

[0083] The headrest holding mechanism 2 of the vehicle seat 1 according to the fourth embodiment includes a panel 5 and a headrest support unit 300, as shown in FIGS. 11, 12, and 13A to 13C.

[0084] The panel 5 is an upper frame of the vehicle seat 1. The panel 5 has a front panel 10, an upper panel 40, and a lower panel 50. The front panel 10 of the panel 5 is the same as that in the first embodiment.

[0085] The upper panel 40 is a plate extending from the front panel 10 toward the rear side of the vehicle. The upper panel 40 is formed horizontally from the top of the front panel 10 toward the rear side. The upper panel 40 is approximately parallel to the upper surface of the vehicle seat 1. The upper panel 40 is approximately parallel to the XY plane. An upper insertion hole 42 is formed in the upper panel 40.

[0086] The upper insertion hole 42 is a hole for inserting the headrest support unit 300. A pair of upper insertion holes 42 is formed in the upper panel 40. The pair of upper insertion holes 42 are formed in a row in the left-right direction of the upper panel 40 in a plan view. The upper insertion holes 42 are rectangular holes. However, this is not limited to this. The shape of the upper insertion hole 42 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 300. The size of the upper insertion hole 42 is larger than the cross-sectional size of the headrest support unit 300 in a plan view. Gaps 42a are formed at the left and right edges of the upper insertion hole 42.

[0087] The lower panel 50 is a plate extending from the front panel 10 toward the rear of the vehicle. The lower panel 50 is formed horizontally from the lower part of the front panel 10 toward the rear. The lower panel 50 is approximately parallel to the upper panel 40. The lower panel 50 is approximately parallel to the XY plane. A lower insertion hole 51 is formed in the lower panel 50.

[0088] The lower insertion holes 51 are holes for inserting the headrest support unit 300. A pair of lower insertion holes 51 are formed in the lower panel 50. The lower insertion holes 51 are formed in a row in the left-right direction of the lower panel 50 in a plan view. The lower insertion holes 51 are formed in a position directly below the upper insertion holes 41. The lower insertion holes 51 are rectangular holes. However, this is not limited to this. The shape of the lower insertion holes 51 may be, for example, a trapezoid with one side inclined, depending on the cross-sectional shape of the headrest support unit 300. The size of the lower insertion holes 51 is larger than the cross-sectional size of the headrest support unit 300 in a plan view.

[0089] The headrest support unit 300 is inserted into the upper insertion hole 41 and the lower insertion hole 51 of the panel 5 to fix the headrest stay B to the panel 5. The headrest support unit 300 has a headrest support 310.

[0090] A pair of headrest supports 310 are attached in the left-right direction when viewed from behind. The headrest support 310 includes a headrest support head portion 121, a body portion 122, an up-down spring 213, a front-rear spring 214, a left-right spring 215, a headrest support upper stopper 216, and a second headrest support lower stopper 317. The headrest support 310 is formed with a second through-hole 120a that penetrates the headrest support 310 in the up-down direction and into which a headrest stay B is inserted. The second through-hole 120a of the headrest support 310 penetrates the headrest support head portion 121 and the body portion 122. A support step 210b is formed on the side of the upper portion of the headrest support 310.

[0091] The second through hole 120a of the headrest support 310, the headrest support head 121, the body 122, the support step 210b, the upper and lower springs 213, the front and rear springs 214, the left and right springs 215, and the headrest support upper stopper 216 are the same as those in embodiment 3.

[0092] The second headrest support lower stoppers 317 are a pair of elastic parts formed to protrude from the side surfaces of the headrest support 310. The pair of second headrest support lower stoppers 317 protrude from the left and right side surfaces of the headrest support 310, respectively. The second headrest support lower stoppers 317 are formed at the bottom of the headrest support 310. The second headrest support lower stoppers 317 are formed at a position where they pass through the gap 42a of the upper insertion hole 42. The second headrest support lower stoppers 317 are provided at a position where they contact the upper surface of the lower panel 50. The second headrest support lower stoppers 317 abut against the upper surface of the lower panel 50 without contacting the upper panel 40, thereby preventing the headrest support 310 of the headrest support unit 300 from moving downward.

[0093] In the headrest holding mechanism 2 of the vehicle seat 1 according to the fourth embodiment, the headrest support 310 is provided with an upper anti-slip structure and a lower anti-slip structure, and vertical movement is suppressed. As a result, the headrest support unit 300 is fixed to the panel 5 by inserting it without welding, and no wavy beads are generated by welding. Therefore, in the headrest holding mechanism 2 of the vehicle seat 1, the headrest support 310 can be held to the panel 5 with simpler installation work and at lower cost.

[0094] Embodiment 5 In the above-described third and fourth embodiments, the headrest support 210, 310 has a headrest support upper stopper 216, and the first and second headrest support lower stoppers 217, 317 prevent the headrest support 210, 310 from moving upward or downward. However, this is not limited to this. It is sufficient that the headrest support is prevented from moving upward or downward. The headrest support 410 according to this embodiment may have only the support step 210b as the upper retaining structure, and the third headrest support lower stopper 417 may prevent the headrest support 210 from moving upward or downward. The following mainly describes the differences from the third or fourth embodiment. Other than the differences described, the present embodiment is the same as or equivalent to the third and fourth embodiments.

[0095] As shown in Figure 14 and Figures 15A to 15C, the headrest holding mechanism 2 of the vehicle seat 1 according to the fifth embodiment includes a panel 5 and a headrest support unit 400. The panel 5 is the same as that in the fourth embodiment.

[0096] The headrest support unit 400 is inserted into the upper insertion hole 41 and the lower insertion hole 51 of the panel 5 to fix the headrest stay B to the panel 5. The headrest support unit 400 has a headrest support 410.

[0097] A pair of headrest supports 410 are attached in the left-right direction when viewed from behind. The headrest support 410 includes a headrest support head 121, a body 122, an up-down spring 213, a front-rear spring 214, a left-right spring 215, and a third headrest support lower stopper 417. The headrest support 410 is formed with a second through-hole 120a that penetrates the headrest support 410 in the up-down direction and into which a headrest stay B is inserted. The second through-hole 120a of the headrest support 410 penetrates the headrest support head 121 and the body 122. A support step 210b is formed on the side of the upper part of the headrest support 410.

[0098] The second through-hole 120a of the headrest support 410, the headrest support head 121, the body 122, the support step 210b, the upper and lower springs 213, the front and rear springs 214, and the left and right springs 215 are the same as those in the third embodiment.

[0099] The third headrest support lower stoppers 417 are a pair of elastic portions formed to protrude from the side surfaces of the headrest support 410. The pair of third headrest support lower stoppers 417 protrude from the left and right side surfaces of the headrest support 410, respectively. The third headrest support lower stoppers 417 are formed at the bottom of the headrest support 410. The third headrest support lower stoppers 417 are formed with a lower stopper portion 417a and an upper stopper portion 417b.

[0100] The lower stopper portions 417a are portions formed at the lower part of the third headrest support lower stopper 417. The lower stopper portions 417a are a pair of elastic portions formed to protrude from the side surfaces of the headrest support 410. The pair of lower stopper portions 417a protrude from the left and right side surfaces of the headrest support 410, respectively. The lower stopper portions 417a are provided at positions where they come into contact with the lower surface of the lower panel 50. The lower stopper portions 417a are each formed with a lower stopper inclined surface 417a1 and a lower stopper tip portion 417a2.

[0101] The lower stopper inclined surface 417a1 is a surface that is inclined so as to taper downward when viewed from behind. When the headrest support 410 is inserted into the upper insertion hole 41 and the lower insertion hole 51, the lower stopper inclined surface 417a1 is pressed against the edges of the upper insertion hole 41 and the lower insertion hole 51. As a result, the pressure received by the lower stopper inclined surface 417a1 causes the lower stopper portion 417a to be pulled in so as to be approximately flush with the side surface of the headrest support 410.

[0102] The lower stopper tip 417a2 is the upper end of the lower stopper portion 417a. The lower stopper tip 417a2 abuts against the lower surface of the lower panel 50, and prevents the headrest support 410 of the headrest support unit 400 from moving upward.

[0103] The upper stopper portions 417b are a pair of elastic portions formed to protrude from the side surfaces of the headrest support 410. The pair of upper stopper portions 417b protrude from the left and right side surfaces of the headrest support 410, respectively. The upper stopper portions 417b are formed in the lower part of the headrest support 410. The upper stopper portions 417b are provided in a position where they contact the upper surface of the lower panel 50. When pressed, the upper stopper portions 417b are retracted so as to be approximately flush with the side surfaces of the headrest support 410. The upper stopper portions 417b abut against the upper surface of the lower panel 50, preventing the headrest support unit 400 from moving downwardly with the headrest support 410.

[0104] In the headrest holding mechanism 2 for the vehicle seat 1 according to the fifth embodiment, the headrest support 410 is provided with an upper anti-slip structure and a lower anti-slip structure, and vertical movement is suppressed. As a result, the headrest support unit 400 is fixed to the panel 5 by inserting it without welding, and no wavy beads are generated by welding. Therefore, in the headrest holding mechanism 2 for the vehicle seat, the headrest support 410 can be held to the panel 5 with easier installation work and at lower cost.

[0105] Embodiment 6 In the above-described third embodiment, the upper end of the headrest support 210 protrudes upward beyond the upper panel 40. In order to reinforce the strength of the headrest support 210, a guide rib 220 may be further provided on the headrest support 210, as shown in Figs. 16 and 17A.

[0106] The guide ribs 220 are formed to protrude from the side surfaces of the headrest support 210. The guide ribs 220 are formed on the front-rear side surfaces of the headrest support 210 to which pressure is likely to be applied when the vehicle seat 1 is in use. The guide ribs 220 are formed in the shape of plates extending in the up-down direction. The guide ribs 220 are formed at adjacent positions on the left and right of the front-rear springs 214 in rear view. Openings 220a are formed in the guide ribs 220 at positions to the sides of the front-rear springs 214 so as not to hinder the deflection of the front-rear springs 214. The guide ribs 220 are inserted into guide grooves 43 formed on the edges of the upper insertion holes 41 of the upper panel 40.

[0107] The guide rib 220 and the guide groove 43 guide the headrest support 210 inserted into the upper insertion hole 41 toward the lower insertion hole 51, and also protect the headrest support 210 from pressure and vibration in the front-to-rear direction.

[0108] Embodiment 7 In the above-described fourth embodiment, the upper end of the headrest support 310 protrudes above the upper panel 40. To reinforce the strength of the headrest support 310, the headrest support 310 may further be provided with a guide rib 220, as in the sixth embodiment. The panel 4 has a guide groove 43 formed on the edge of the upper insertion hole 41 of the upper panel 40, as shown in FIG. 17B(a).

[0109] Embodiment 8 In the above-described fifth embodiment, the upper end of the headrest support 410 protrudes upward beyond the upper panel 40. To reinforce the strength of the headrest support 410, the headrest support 410 may be further provided with a guide rib 220, as in the sixth embodiment. The panel 5 has a guide groove 43 formed on the edge of the upper insertion hole 42 of the upper panel 40, as shown in FIG. 17B(b).

[0110] The first to eighth embodiments are configured by combining various structures as shown in Fig. 18. However, this is not limited to this. The headrest holding mechanism 2 of the vehicle seat 1 may be configured by a combination other than the combination shown in Fig. 18.

[0111] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0112] In the above-described first and second embodiments, the lower end portion 110b of the bracket 110 is inserted into the lower insertion hole 31. However, this is not limited to this. For example, the lower end portion 110b of the bracket 110 may be flush with the lower panel 30. As shown in FIG. 19(a), the headrest holding mechanism 2 of the vehicle seat 1 may have legs 110c extending downward from the side surfaces of the bracket 110 formed by stamping or drawing at the lower end of the bracket 110, and grooves or openings that fit into the lower ends of the legs 110c of the bracket 110 may be formed in the lower panel 30.

[0113] In the above-described first and second embodiments, the lower end portion 110b of the bracket 110 is hooked onto the lower panel stopper 32. However, this is not limited to this. As shown in Fig. 19(b), the headrest holding mechanism 2 of the vehicle seat 1 may have a bracket step 110d formed by cutting out the outer peripheral surface side of the bracket 110 by stamping or drawing at the lower end of the bracket 110, and the bracket step 110d may be hooked onto the edge of the lower insertion hole 31.

[0114] As shown in Fig. 19(c), the lower end 110b of the bracket 110 is configured by combining various structures with those of the first or second embodiment. However, this is not limited to this. The headrest holding mechanism 2 of the vehicle seat 1 may be configured with a combination other than that shown in Fig. 19(c).

[0115] In the above-described third to fifth embodiments, the panels 3, 4, and 5 are formed with upper insertion holes 41, 42 and lower insertion holes 51. Furthermore, the panels 3, 4, and 5 may be provided with an upper guide portion 44 and a lower guide portion 52, as shown in FIGS.

[0116] The upper guide portion 44 is a portion formed on the edge of the upper insertion holes 41, 42. The upper guide portion 44 is formed in a cylindrical shape extending upward from the edge of the upper insertion holes 41, 42. However, this is not limited thereto. The upper guide portion 44 may also be formed in a cylindrical shape extending downward from the edge of the upper insertion holes 41, 42.

[0117] The lower guide portion 52 is a portion formed on the edge of the lower insertion hole 51. The lower guide portion 52 is formed in a cylindrical shape extending upward from the edge of the lower insertion hole 51. However, this is not limited to this. The lower guide portion 52 may also be formed in a cylindrical shape extending downward from the edge of the lower insertion hole 51.

[0118] The upper guide portion 44 and the lower guide portion 52 are formed to extend both upward or both downward from the upper insertion holes 41, 42 and the lower insertion hole 51. However, this is not limited thereto. The upper guide portion 44 may extend upward and the lower guide portion 52 may extend downward, or the upper guide portion 44 may extend downward and the lower guide portion 52 may extend upward.

[0119] The upper and lower retaining structures of the headrest supports 210, 310, 410 are formed so as to be located at the upper or lower ends of the upper guide portion 44 and the lower guide portion 52. Furthermore, the upper and lower springs 213, the front and rear springs 214, and the left and right springs 215 of the headrest supports 210, 310, 410 are formed so as to contact the upper guide portion 44 or the lower guide portion 52.

[0120] As shown in Fig. 20(c), the upper guide portion 44 and the lower guide portion 52 are configured in combination with any one of the third to eighth embodiments. However, this is not limited to this. The headrest holding mechanism 2 of the vehicle seat 1 may be configured with a combination other than the combination shown in Fig. 20(c).

[0121] This invention allows various embodiments and modifications without departing from the broad spirit and scope of this invention. Furthermore, the above-described embodiments are intended to explain this invention and do not limit the scope of this invention. That is, the scope of this invention is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of the invention equivalent thereto are considered to be within the scope of this invention. [Explanation of symbols]

[0122] 1 Vehicle seat, 2 Headrest holding mechanism, 3, 4, 5 Panel, 10 Front panel, 20, 40 Upper panel, 20a, 40a Rolling-up portion, 21, 41, 42 Upper insertion hole, 22 Guide plate, 23 First upper panel stopper, 24 Second upper panel stopper, 30, 50 Lower panel, 30a, 50a Rolling-down portion, 31, 51 Lower insertion hole, 32 Lower panel stopper, 42a Air gap, 43 Guide groove, 44 Upper guide portion, 52 Lower guide portion, 100, 200, 300, 400 Headrest support unit, 110 Bracket, 110a First through hole, 110b Lower end portion, 110c Leg portion, 110d Bracket step, 111 Bracket upper hole, 112 Fitting groove, 113 Bracket upper stopper, 113a inclined surface, 113b tip portion, 120, 210, 310, 410 headrest support, 120a second through hole, 121 headrest support head, 121a lock release button, 122 body portion, 123 mating protrusion, 124, 213 upper and lower springs, 125, 214 front and rear springs, 126, 215 left and right springs, 210b support step, 215a upper leg portion, 215b lower leg portion, 215c flat portion, 216 headrest support upper stopper, 216a inclined surface, 216b tip portion, 217 first headrest support lower stopper, 217a inclined surface, 217b tip portion, 220 guide rib, 220a opening, 317 second headrest support lower stopper, 417 Third headrest support lower stopper, 417a lower stopper portion, 417a1 lower stopper inclined surface, 417a2 lower stopper tip portion, 417b upper stopper portion, A headrest, B headrest stay, C upper frame.

Claims

1. a panel including an upper panel having a pair of upper insertion holes formed therein and parallel to an upper surface of the vehicle seat, and a lower panel having a pair of lower insertion holes formed therein and parallel to the upper panel; a pair of headrest support units including a headrest support into which a headrest stay is inserted, the headrest support units being inserted into the upper insertion hole and the lower insertion hole; an upper retaining structure provided on an upper portion of the headrest support unit, the upper retaining structure contacting the upper panel and suppressing movement in at least one direction in the vertical direction of the vehicle; a lower retaining structure provided at a lower portion of the headrest support unit, the lower retaining structure contacting the lower panel and suppressing movement in at least one of the up and down directions of the vehicle; A headrest holding mechanism for a vehicle seat.

2. The headrest support unit includes a bracket into which a headrest support is inserted, The upper panel is provided with a first upper panel stopper that protrudes downward from an edge of the upper insertion hole, the upper retaining structure is a bracket upper hole formed in the bracket and into which a lower end of the first upper panel stopper is hooked, The headrest holding mechanism for a vehicle seat according to claim 1 , wherein the first upper panel stopper engages with the bracket upper hole to restrict vertical movement of the headrest support unit.

3. The headrest support unit includes a bracket into which a headrest support is inserted, a second upper panel stopper is formed on the upper panel and protrudes downward from an edge of the upper insertion hole; the upper retaining structure is a bracket upper stopper that protrudes from a side surface of the bracket and is retracted when the bracket is inserted downward into the upper insertion hole, The headrest holding mechanism for a vehicle seat according to claim 1 , wherein the second upper panel stopper and the bracket upper stopper come into contact with each other to suppress downward movement of the headrest support unit.

4. The headrest support unit includes a bracket into which a headrest support is inserted, The lower panel is provided with a lower panel stopper that protrudes downward from an edge of the upper insertion hole, the lower retaining structure is a lower end portion of the bracket, 2. The headrest holding mechanism for a vehicle seat according to claim 1, wherein the lower panel stopper is hooked onto a lower end of the bracket to suppress downward movement of the headrest support unit.

5. The headrest support unit includes a bracket into which a headrest support is inserted, The bracket has legs that protrude from the sides and extend downward, The lower panel is formed with grooves or openings into which the legs are inserted, the lower retaining structure is the leg of the bracket, The headrest holding mechanism for a vehicle seat according to claim 1 , wherein the leg portion is inserted into the groove or the opening in the lower panel to suppress downward movement of the headrest support unit.

6. The headrest support unit includes a bracket into which a headrest support is inserted, A bracket step is formed at the lower end of the bracket by cutting out the outer peripheral surface side, The headrest holding mechanism for a vehicle seat according to claim 1 , wherein the bracket step abuts against an upper surface of the lower panel to suppress downward movement of the headrest support unit.

7. The headrest support is inserted into the upper insertion hole and the lower insertion hole, The upper portion retaining structure has a headrest support upper portion stopper formed on an upper portion of the headrest support, 2. The headrest holding mechanism for a vehicle seat according to claim 1, wherein the headrest support upper stopper protrudes from a side surface of the headrest support, is retracted when the headrest support is inserted downward into the upper insertion hole, and abuts against the lower surface of the upper panel when the headrest support moves upward, thereby suppressing movement.

8. The lower portion retaining structure has a first headrest support lower portion stopper formed on a lower portion of the headrest support, 8. The headrest holding mechanism for a vehicle seat according to claim 7, wherein the first headrest support lower stopper is retracted when inserted downward into the upper insertion hole and the lower insertion hole, and when the headrest support moves upward, it abuts against the lower surface of the lower panel to suppress movement.

9. The lower portion retaining structure has a second headrest support lower portion stopper formed on a lower portion of the headrest support, 8. The headrest retaining mechanism for a vehicle seat according to claim 7, wherein the second headrest support lower stopper protrudes from a side of the headrest support, and when pressed, is retracted and abuts against an upper surface of the lower panel to suppress downward movement of the headrest support.

10. The headrest support is inserted into the upper insertion hole and the lower insertion hole, 2. The headrest holding mechanism for a vehicle seat according to claim 1, further comprising: a lower stopper portion formed at a lower portion of the headrest support, protruding from a side surface of the headrest support, retracting when inserted downward into the upper insertion hole and the lower insertion hole, and abutting against the lower surface of the upper panel when the headrest support moves upward, thereby suppressing movement; and a third headrest support lower stopper having an upper stopper portion protruding from a side surface of the headrest support, retracting when pressed, and abutting against the upper surface of the lower panel when the headrest support moves downward, thereby suppressing movement.

11. The headrest support is front and rear springs formed on the front and rear side surfaces of the headrest support and abutting against edges of the upper insertion hole and the lower insertion hole, respectively; left and right springs formed on the left and right side surfaces of the headrest support and abutting against edges of the upper insertion hole and the lower insertion hole, respectively; upper and lower springs formed on the side surfaces of the headrest support and in contact with the upper surface of the upper panel; The headrest holding mechanism for a vehicle seat according to any one of claims 7 to 10, comprising:

12. 12. The headrest holding mechanism for a vehicle seat according to claim 11, wherein the headrest support is provided on a side surface of the vehicle in the fore-and-aft direction, and a rib having an opening formed therein is provided at a position to the side of the front and rear springs.

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