JP5289751B2 - Headrest support with backlash prevention mechanism - Google Patents

Description

  The present invention relates to a rattling prevention mechanism for the entire headrest device such as a bracket, a headrest support and / or a headrest stay (referred to as a stay). Regarding headrest support.

  The rattle prevention mechanism of the headrest support is a structure that is necessary when silence in the vehicle is desired, and many inventions and / or devices have been proposed so far, some of which have been put into practical use. ing. For example, the invention and / or product proposed by the present applicant is a pioneer in the industry, and the product has become an industry standard product at present.

  Based on the above-described current situation, an outline of its excellent structure and mechanism will be described. “Headrest support” in Japanese Patent Laid-Open No. 11-89665 cited as Reference (1) 198226 “Headrest support and lock member assembled to the headrest support”. The products on the market are mainly products according to the literature (1).

  In this document (1), a headrest support is integrally formed of a resin with a head portion, a neck portion, and a trunk portion, and a stay pressing portion that elastically holds a stay of the headrest inward toward the trunk portion. And thus a structure for elastically supporting the stay. First, the bracket, the headrest support, and the stay between the stay and the assembled state are prevented from being loose, and the looseness after the assembling is prevented. The purpose is to prevent it. By adopting this structure, for example, the quietness during driving is improved, the problem of tolerance between the bracket on the production surface, the headrest support, and the stay, and the tolerance for temperature change are also solved. It is intended to prevent backlash between the headrest support and the stay without being affected by the variation of the headrest.

  Reference (2) is a structure intended to further prevent backlash of the structure of Reference (1), and is directed downward in the axial direction of the neck portion toward the axial center of the through hole through the wall of the headrest support. It is intended to prevent play between the headrest support and the stay via the second and third stay elastic pressing portions formed to bulge.

JP-A-11-89665 JP 2006-198226

  The references (1) and (2) are designed to prevent backlash between the bracket, the headrest support, and the stay, but the backlash prevention means (elastic body, stay elasticity) provided on the body and neck of the headrest support. This is a structure that prevents backlash via the pressing portion. Therefore, in the moment formed by integrating the axial distance (axial length) and the weight of the headrest, which is maintained by the headrest and the support portion that elastically supports the headrest stay, the headrest, It is a mechanism that supports the entire structure. Therefore, in order to prevent backlash between the headrest stay, the headrest support, and the bracket, if possible, when the weight of the headrest is increased or the headrest is fully extended Is considered to be insufficient power and play based on this power shortage.

  Therefore, in any use state, further improvement is required in order to surely prevent backlash and backlash due to tolerance (ensuring silence) or to improve strength.

  In view of the above, the present invention intends to improve the above-mentioned documents (1) and (2), and to prevent rattling caused by assembly and / or tolerance due to tolerances, etc. after assembly of parts. Intended. Further, it is possible to effectively utilize the structure proposed in the documents (1) and (2) and to propose a structure suitable for mass production, or to simplify and assemble / manufacture the backlash. It is intended to propose a headrest support with a prevention mechanism.

The inventions of claims 1 and 2 are directed to a bracket provided on the housing of the seat, a headrest support provided on the bracket, and rattling prevention and / or tolerances generated after assembly of the stay provided on the headrest support. It is intended to eliminate almost all of the resulting backlash. The invention of claim 1 makes effective use of the structure proposed in the prior documents (1) and (2), and proposes a structure suitable for mass production, or simplification of assembly and manufacturing, It is intended to propose a headrest support equipped with a backlash prevention mechanism for convenience.

Claim 1 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
The upper part which consists of the elastic body for stay pressing provided toward the surrounding surface of the said through-hole of the said head , and the receiving chamber of the notch part which received this elastic body and formed toward the surrounding surface of the said through-hole The rattle prevention mechanism,
It is a headrest support provided with a rattle prevention mechanism.

Claim 2 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed on the peripheral surface of the through hole, and the elastic body is an elastic member protruding from the peripheral surface toward the through hole through a wall at a position corresponding to the notch. It is a headrest support provided with a rattle prevention mechanism configured as a body tongue piece .

The inventions of claims 3 to 10 are intended to achieve the object of claim 1 and to provide an optimal receiving chamber and elastic body structure for achieving the object.

Claim 3 is a headrest support that is formed so as to be able to support and support a headrest stay provided with a headrest disposed above the seat back, and supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notched portion with a step formed toward the peripheral surface of the through hole, and the elastic body is an elastic protruding toward the peripheral surface at a position corresponding to the notched portion with the step. It is a headrest support provided with a rattle prevention mechanism configured as a body tongue piece.

Claim 4 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed on the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed in the peripheral surface of the through hole, and the elastic body is a peripheral surface of the through hole at a position corresponding to the notch and is directed upward from below. This is a headrest support provided with a backlash prevention mechanism configured to be an elastic protrusion protruding and formed.

Claim 5 is the headrest support according to claim 4 ,
It is a headrest support provided with a backlash prevention mechanism in which the tip end portion of the elastic protrusion is thin.

Claim 6 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and can be supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a cavity formed in the through hole through a wall, and the elastic body is formed in a position corresponding to the cavity from the peripheral surface of the through hole in the axial direction. It is a headrest support provided with the rattle prevention mechanism constituted as an elastic body bulging piece.

Claim 7 is the headrest support according to claim 6 ,
It is a headrest support provided with a backlash prevention mechanism in which the tip of the elastic body bulging piece is separated from the inner surface.

Claim 8 is the headrest support according to claim 1,
The elastic body includes an elastic body bulging piece projecting from the peripheral surface of the through hole through the wall in the axial direction of the through hole, and a cavity provided in the neck portion forming the elastic body bulging piece It is a headrest support provided with a rattle prevention mechanism configured as a hole.

Claim 9 is the headrest support according to claim 8 ,
It is a headrest support provided with a backlash prevention mechanism in which the tip of the elastic body bulging piece is separated from the inner surface.

Claim 10 is the headrest support according to claim 1,
The headrest support includes a backlash prevention mechanism configured to provide a plurality of the receiving chamber and the elastic body.

The invention of claim 1 is a headrest support that is fitted and held with a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed on the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck, provided below the neck.
From the head, the neck, as well as the through hole for stay insertion that extends through the trunk,
A backlash prevention mechanism formed by a notch piece for pressing the bracket formed on the neck part and a stay provided in pairs in the longitudinal direction of the body part and / or an elastic band piece for pressing the bracket;
An elastic body for stay pressing provided toward the peripheral surface of the through hole in the head , and an upper backlash prevention mechanism comprising a receiving chamber of a notch formed to receive the elastic body and toward the peripheral surface of the through hole When,
It is a headrest support provided with a rattle prevention mechanism.

The invention of claim 2 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck, provided below the neck.
From the head, the neck, as well as the through hole for stay insertion that extends through the trunk,
A backlash prevention mechanism formed by a notch piece for pressing the bracket formed on the neck part and a stay provided in pairs in the longitudinal direction of the body part and / or an elastic band piece for pressing the bracket;
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed on the peripheral surface of the through hole, and the elastic body is an elastic tongue protruding from the peripheral surface toward the through hole through the wall at a position corresponding to the notch. The headrest support is provided with a rattle prevention mechanism.

Accordingly, the first and second aspects of the present invention relate to the bracket provided on the housing of the seat, the headrest support provided on the bracket, the backlash generated after assembly of the stay provided on the headrest support, and / or the tolerance thereof. There is a feature that can prevent the looseness caused by almost none. Claim 1 makes effective use of the structure proposed in the prior documents (1) and (2) and proposes a structure suitable for mass production, or simplification and convenience of assembly / manufacturing. Has the advantage of being able to propose a headrest support equipped with a rattle prevention mechanism.

The invention of claim 3 is a headrest support that is fitted and held with a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed on the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck.
From the head, the neck, as well as the through hole for stay insertion that extends through the trunk,
A backlash prevention mechanism formed by a notch piece for pressing the bracket formed on the neck part and a stay provided in pairs in the longitudinal direction of the body part and / or an elastic band piece for pressing the bracket;
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notched portion with a step formed toward the peripheral surface of the through hole, and the elastic body is an elastic tongue that protrudes toward the peripheral surface at a position corresponding to the notched portion with a step. It is a headrest support provided with the rattle prevention mechanism which was constituted.

The invention of claim 4 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed in the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck, provided below the neck.
From the head, the neck, as well as the through hole for stay insertion that extends through the trunk,
A backlash prevention mechanism formed by a notch piece for pressing the bracket formed on the neck part and a stay provided in pairs in the longitudinal direction of the body part and / or an elastic band piece for pressing the bracket;
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed on the peripheral surface of the through-hole, and the elastic body is formed at the position corresponding to the notch, the peripheral surface of the through-hole and bulging upward from below. It is a headrest support provided with a backlash prevention mechanism configured to be an elastic protrusion.

Invention of Claim 5 is the headrest support of Claim 4 , Comprising:
It is a headrest support provided with a backlash prevention mechanism in which the tip end portion of the elastic projection piece is thin.

The invention of claim 6 is a headrest support that is fitted and held in a headrest stay provided with a headrest disposed above the seat back, and is formed so as to be supported by a receiving member disposed on the seat,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck, provided below the neck.
From the head, the neck, as well as the through hole for stay insertion that extends through the trunk,
A backlash prevention mechanism formed by a notch piece for pressing the bracket formed on the neck part and a stay provided in pairs in the longitudinal direction of the body part and / or an elastic band piece for pressing the bracket;
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a cavity formed in the through hole through a wall, and the elastic body is bulged from the peripheral surface of the through hole toward the axial direction at a position corresponding to the cavity. It is a headrest support provided with a rattling prevention mechanism configured as a piece.

The invention of claim 7 is the headrest support according to claim 6 ,
It is a headrest support provided with a backlash prevention mechanism in which the tip of the elastic body bulging piece is separated from the inner surface.

The invention of claim 8 is the headrest support according to claim 1,
The elastic body is configured as an elastic body bulging piece projecting from the peripheral surface of the through hole through the wall in the axial direction of the through hole, and a hollow hole provided in a neck portion forming the elastic body bulging piece It is a headrest support equipped with a play prevention mechanism.

The invention of claim 9 is the headrest support according to claim 8 ,
It is a headrest support provided with a backlash prevention mechanism in which the tip of the elastic body bulging piece is separated from the inner surface.

The invention of claim 10 is the headrest support according to claim 1,
It is a headrest support provided with a backlash prevention mechanism in which a receiving chamber and a plurality of elastic bodies are provided.

Accordingly, the inventions according to claims 3 to 10 have the characteristics that the object of claim 1 can be achieved, and that an optimal receiving chamber and elastic body structure can be provided to achieve the object.

  An example of the present invention will be described.

  First, the drawings will be explained. FIG. 1 is an exploded perspective view showing the relationship between the vehicle and the headrest device in an exploded manner, and FIG. 2 is an enlarged perspective view of a main part (excluding brackets and stays) of the headrest device. 3 is a schematic diagram showing the characteristics of the present invention, and is a chart showing the moment characteristics of the headrest support shown in Document 1 and the rattling prevention mechanism by the headrest support of the present invention.

4 and FIGS. 4-1 to 4-6 show the upper backlash prevention mechanism of the first embodiment described in claim 1 , and FIG. 4 shows the main part of the headrest device of the first embodiment. FIG. 4-1 is a plan view of a through hole in the head of the headrest support of the first embodiment, and FIG. 4-2 is a cross-sectional view of the head rest support in FIG. 4-3 is an AA cross-sectional view of FIG. 4-1, FIG. 4-4 is a BB cross-sectional view of FIG. 4-1, and FIG. 4-5 is FIG. -1 shows the movement of the elastic tongue piece -1, and is a plan view showing a state in which the stay is pressed by the elastic tongue piece, and FIG. 4-6 is a cross-sectional view taken along line AA in FIG. It is sectional drawing which showed another example of these.

Next, FIGS. 5 and 5-1 to 5-7 show the upper backlash prevention mechanism of the second embodiment described in claim 2 , and FIG. 5 shows the main part of the headrest device of the second embodiment. FIG. 5-1 is a plan view of the through hole in the head of the headrest support of the second embodiment, and FIG. 5-2 is a plan view of the through hole and the elastic tongue in FIG. FIG. 5-3 is an AA cross-sectional view of FIG. 5-1, FIG. 5-4 is a BB cross-sectional view of FIG. 5-1, and FIG. FIG. 5-6 shows a state in which the elastic tongue piece of FIG. 5-4 has moved further, and shows a state in which the stay is pressed. FIG. 5 and FIG. 5-7 are cross-sectional views showing another example of the AA cross-sectional view of FIG.

Next, FIGS. 6 and 6-1 to 6-6 show an upper backlash preventing mechanism which is a first example of the third embodiment described in claims 3 and 4 , and FIG. Sectional drawing of the principal part (except a bracket) of the headrest apparatus which is a 1st example of an Example, FIG. 6-1 is a top view of the through-hole of the head of the headrest support of the 1st example of a 3rd Example, FIG. 6-2 is an enlarged plan view showing the relationship between the through hole and the elastic protrusion in FIG. 6-1, FIG. 6-3 is a cross-sectional view taken along the line AA in FIG. 6-1, and FIG. FIG. 6B is a cross-sectional view taken along the line BB of FIG. 6-1, and FIG. 6-5 is a plan view showing a state where the elastic tongue piece of FIG. FIG. 6-6 is a sectional view showing another example of the BB sectional view of FIG. 6-4.

7 and FIGS. 7-1 to 7-6 show an upper backlash preventing mechanism which is a second example of the third embodiment described in claims 3 and 4. FIG. Sectional drawing of the principal part (except a bracket) of the headrest apparatus which is a 2nd example of an Example, FIG. 7-1 is a top view of the through-hole of the head of the headrest support of the 2nd example of a 3rd Example, FIG. 7-2 is an enlarged plan view showing the relationship between the through-hole and the elastic protrusion in FIG. 7-1, FIG. 7-3 is a cross-sectional view along AA in FIG. 7-1, and FIG. FIG. 7B is a cross-sectional view taken along the line BB in FIG. 7-1, and FIG. 7-5 is a plan view showing a state in which the elastic tongue piece of FIG. FIG. 7-6 is a cross-sectional view showing another example of the BB cross-sectional view of FIG. 7-4 .

Further, FIGS. 8-1 to 8-9 show an upper backlash preventing mechanism which is a first example of the fourth embodiment described in claim 5 , and FIG. 8-1 shows a fourth embodiment of the fourth embodiment. FIG. 8-2 is an enlarged plan view showing the relationship between the through hole and the elastic protrusion in FIG. 8-1, and FIG. 8-3 is a diagram. 8-2 is an AA end view, FIG. 8-4 is a BB sectional view of FIG. 8-3, FIG. 8-5 is a CC sectional view of FIG. 8-3, and FIG. 8-6 is an elastic tongue. FIG. 8 is a plan view showing a state of pressing the stay with the elastic tongue piece, and FIG. 8-7 shows another example of the AA end view of FIG. 8-2. 8-8 is a sectional view showing still another example of the CC sectional view of FIG. 8-3, and FIG. 8-9 is still another example of the CC sectional view of FIG. 8-3. It is sectional drawing which showed.

FIGS. 9-1 to 9-7 show an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and FIG. 9-1 shows the fourth embodiment. 9-2 is a plan view of the head through hole in the headrest support of the second example, FIG. 9-2 is an enlarged plan view showing the relationship between the through hole and the elastic protrusion in FIG. 9A is an AA end view of FIG. 9-2, FIG. 9-4 is a BB cross-sectional view of FIG. 9-3, FIG. 9-5 is a CC cross-sectional view of FIG. 9-3, and FIG. FIG. 9 is a plan view showing the movement of the body tongue piece, showing a state in which the stay is pressed by the elastic tongue piece, and FIG. 9-7 is another example of the AA end view of FIG. 9-2. It is sectional drawing which showed.

10-1 to 10-6 show an upper backlash preventing mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and FIG. 10-1 shows the fourth embodiment. 10-2 is a plan view of the head through hole in the headrest support of the third example, FIG. 10-2 is an enlarged plan view showing the relationship between the through hole and the elastic protrusion in FIG. 10-1, FIG. 10-2 is an AA end view of FIG. 10-2, FIG. 10-4 is a BB cross-sectional view of FIG. 10-3, and FIG. 10-5 shows the movement of the elastic tongue piece. FIG. 10-6 is a cross-sectional view showing another example of the AA end view of FIG. 10-2.

FIGS. 11-1 to 11-5 show an upper backlash preventing mechanism which is a fourth example of the fourth embodiment described in claim 10. FIG. 11-1 shows the fourth embodiment. 11-2 is a plan view of the head through-hole of the headrest support of FIG. 11, FIG. 11-2 is an enlarged plan view showing the relationship between the through-hole of FIG. 11A is an end view taken along line AA in FIG. 11-2, FIG. 11-4 is a cross-sectional view taken along line BB in FIG. 11-3, and FIG. It is sectional drawing shown.

  FIGS. 12-1 to 12-8 are enlarged plan views showing examples in which a plurality of elastic bodies according to the above-described embodiments are provided.

  Hereinafter, a preferable example of the present invention will be described.

  The headrest support 1 of the present invention is integrally molded with, for example, a resin such as polypropylene and has a structure in which a through-hole 3 for inserting a headrest stay (referred to as a stay 2) is inserted through the top and bottom in the axial direction. 1 to 3 and the like, the headrest support 1 extends from the upper part in the axial direction toward the lower part and extends from the substantially rectangular head 100 and the bottom surface of the head 100, and The neck portion 101 having a smaller diameter than the head portion 100 and having a thick portion between the through hole 3 and extending from the bottom surface of the neck portion 101 and having a smaller diameter than the neck portion 101, And it is comprised by the cylindrical trunk | drum 102 which provided the thick part (thick part thinner than the thick part of the head 100) between the said through-holes 3. FIG. And this through-hole 3 exhibits the same internal diameter as the trunk | drum 102 from the head 100. FIG.

  The head 100 of the headrest support 1 has a rounded outer peripheral surface on its four sides. The entire neck portion 101 of the headrest support 1 and a part of the trunk portion 102 are attached to a bracket 5 (receiving member) having a substantially square shape provided in pairs with the frame C1 of the seat back C as shown in FIG. It is inserted and held. Then, the lower surface 100 c 1 of the head main body 100 c of the head 100 is bumped to the upper surface 5 a of the bracket 5. Further, a notch piece (described later) of the neck portion 101 is elastically pressed (elastically fitted) to the inner peripheral surface 5b of the bracket 5.

  An upper backlash prevention mechanism “X” for pressing the stay is provided on the peripheral surface 100b (periphery) of the cylindrical portion 100a (through hole 3) of the head 100. The upper backlash prevention mechanism “X” includes a receiving chamber 6 (receiving means) provided in a cutout in the peripheral surface 100b, and an elastic body 7 that can be bent into the receiving chamber 6 (penetration, bending, air intake / exhaust, etc.). Each embodiment of the receiving chamber 6 and the elastic body 7 will be described below with respect to the first to fourth embodiments.

[A] FIGS. 4-1 to 4-6 are examples of the first embodiment described in claim 1 , and the receiving chamber 6 is a circumferential surface 100 b and is arranged in the circumferential direction “A”. And a notch 600 formed in the axial direction “I”. The elastic body 7 is a tongue-like elastic tongue piece 700 extending from the peripheral surface 100b toward the center of the axial direction “U” and extending in the circumferential direction “A”. In the elastic tongue 700, the tip 700a is thin and has a bowl shape, the center 700b is thick and curved, and the base end 700c (continuous portion) is further thick (center 700b). Is the R surface 700d on the inner side (circumferential direction “A”) of the through hole 3 and the anti-R surface 700e on the outer side (the axial direction “U” of the through hole 3). Accordingly, when the elastic tongue 700 is pressed by the stay 2, although not shown, the first central portion 700b is pressed and approaches the peripheral surface 100b, and the distal end portion 700a expands and the peripheral surface. Approach toward 100b. Then, the R surface 700d of the base end portion 700c is narrowed and the anti-R surface 700e is bent. Finally, (the elastic tongue piece is moved), the inner surface side 700b1 of the central portion 700b The inner surface 100b is annular, and the elastic tongue 700 is elastically pressed. Therefore, the stay 2 is in a state of elastically holding substantially the whole of the stay 2 by utilizing repulsion (repulsion against elasticity or elasticity) by the cylindrical portion 100a of the head 100 and the elastic tongue piece 700. 4-5 (the upper backlash prevention mechanism “X” operates. The same applies hereinafter). Further, as shown in FIG. 4-3, the free end 700f above the circumferential direction “a” of the elastic tongue piece 700 is formed thin, and the insertion of the stay 2 is facilitated through this thin shape, and this elasticity This is useful for preventing breakage and cracking of the body tongue piece 700. The bending angle between the R surface 700d and the anti-R surface 700e is such that the R surface 700d <the anti-R surface 700e, thereby making the elastic tongue piece 700 flexible (bending, returning, etc.) smoothly and durable. To improve the performance (the same is true for the other embodiments). In addition, the elastic tongue 700 can have a structure in which a spring (not shown) is built in, so that the flexibility, elasticity, durability, and the like can be improved (the same applies to the other embodiments). 4-6 shows another example in which the lower side of the elastic tongue piece 700 is continuously provided in the axial direction “I” of the peripheral surface 100b. Others conform to the example of the first embodiment.

[B] FIGS. 5-1 to 5-7 are examples of the second embodiment described in claim 2 , and the receiving chamber 6 is a peripheral surface 100 b in the circumferential direction “A”. In addition, a notch portion 600 is formed in a notch in the axial direction “I”, and a step portion 600 a is formed in the notch portion 600. The elastic body 7 is a tongue-like elastic tongue piece 700 extending from the peripheral surface 100b toward the center of the axial direction “U” and extending in the circumferential direction “A”. In the elastic tongue 700, the tip 700a is thin and has a bowl shape, the center 700b is thick and curved, and the base end 700c (continuous portion) is further thick (center 700b). Is the R surface 700d on the inside and the anti-R surface 700e on the outside. Accordingly, when the elastic tongue 700 is pressed by the stay 2, although not shown, the first central portion 700b is pressed and approaches the peripheral surface 100b, and the distal end portion 700a expands and the peripheral surface. Approach toward 100b. And this front-end | tip part 700a stops at the step part 600a. Thereafter, the central portion 700b is pressed by the stay 2, so that the distal end portion 700a moves along the stepped portion 600a, the R surface 700d of the base end portion 700c is narrowed, and the anti-R surface 700e is bent. This state is shown in FIG. Finally (the elastic tongue piece is further moved), the inner surface side 700b1 of the central portion 700b and the peripheral surface 100b become annular, and the elastic tongue piece 700 is repressed. Therefore, the stay 2 is in a state of elastically holding substantially the whole of the stay 2 by utilizing repulsion (repulsion against elasticity or elasticity) by the cylindrical portion 100a of the head 100 and the elastic tongue piece 700. 5-6. Others are in accordance with the first embodiment described above. 4-7 shows another example in which the lower side of the elastic tongue piece 700 is continuously provided in the axial direction “I” of the peripheral surface 100b. Others conform to the example of the second embodiment.

[C] FIGS. 6-1 to 6-6 show a first example of the third embodiment described in claims 3 and 4. The receiving chamber 6 is a peripheral surface 100b, and its circumferential direction. This is a notch 600 formed in a notch in “A” and in the axial direction “I”. Further, the elastic body 7 is a plate-like elastic body as viewed in plan from the lower side (neck 101 direction) in the axial direction “n” from the peripheral surface 100b toward the upper opening and adjacent in the circumferential direction “a”. It is the protruding piece 700-1. In the elastic projecting piece 700-1, the distal end portion 700-1a is thin and has a hook shape, the central portion 700-2b is thick and has a curved surface shape, and the base end portion 700-1c (continuous connection portion). Is thicker (the central portion 700-2b is thicker), the inner surface thereof is an R surface 700c, and the outer surface thereof is an anti-R surface 700e. Therefore, when the elastic projecting piece 700-1 is pressed by the stay 2, although not shown, the first central portion 700-2b is pressed and approaches the peripheral surface 100b, and the tip portion 700-1a Extends and approaches toward the peripheral surface 100b. Then, the R surface 700-1d of the base end portion 700-1c is narrowed and the anti-R surface 700-1e is bent, and finally (in a state where the elastic projecting piece has moved), the central portion The inner peripheral surface 700-2b1 of 700-2b and the peripheral surface 100b are annular, and the elastic protrusion 700-1 is elastically pressed. Accordingly, the stay 2 elastically holds substantially the entire stay 2 by utilizing repulsion (repulsion against elasticity or elasticity) by the cylindrical portion 100a of the head 100 and the elastic protrusion 700-1. The state is shown in FIGS. 6-5. Further, as shown in FIG. 6-3, the free end 700-1f above the axial direction “I” of the elastic protrusion 700-1 is formed thin, and the insertion of the stay 2 is facilitated through this thin shape. This is useful for preventing breakage and cracking of the elastic protrusion 700-1. The bending angle between the R surface 700-1d and the anti-R surface 700-1e is such that the R surface 700-1d <the anti-R surface 700-1e, and the flexibility of the elastic projecting piece 700-1 is made smooth. Also, improve durability. FIG. 6-6 shows another example in which the side end of the elastic projecting piece 700-1 is continuously provided in the circumferential direction “a” of the peripheral surface 100b. Others conform to the first example of the third embodiment.

[D] FIGS. 7-1 to 7-6 are second examples of the third embodiment described in claims 3 and 4 , and the receiving chamber 6 is a peripheral surface 100b, and its circumferential direction. A notch 600 is formed in a notch in “A” and in the axial direction “I”. Further, the elastic body 7 is a plate-like elastic body as viewed in plan from the lower side (neck 101 direction) in the axial direction “n” from the peripheral surface 100b toward the upper opening and adjacent in the circumferential direction “a”. It is the protruding piece 700-1. In the elastic projecting piece 700-1, the distal end portion 700-1a is thin and has a hook shape, the central portion 700-2b is thick and has a curved surface shape, and the base end portion 700-1c (continuous connection portion). Is thicker (the central portion 700-2b is thicker), the inner surface thereof is an R surface 700c, and the outer surface thereof is an anti-R surface 700e. In this second example, as shown in FIG. 7-3, the free end 700-1f in the axial direction “I” of the elastic protrusion 700-1 is somewhat thinner (in the first example of the third embodiment). In contrast, it is useful for facilitating insertion of the stay 2 and expanding and preventing the elastic projecting piece 700-1 from being broken or cracked. Similar to the first example of the other second embodiment described above. FIG. 7-6 shows another example in which the side end of the elastic projecting piece 700-1 is connected in the circumferential direction “a” of the inner surface 100b. Others conform to the first example of the third embodiment described above.

[E] FIGS. 8-1 to 8-9 show a first example of the fourth embodiment described in claims 5 and 6 , and this receiving chamber 6 is a peripheral surface 100b, and its circumferential direction. It is the cavity 600-2 formed in “A” and in the axial direction “I”. The elastic body 7 bulges from the peripheral surface 100b through the wall 700h toward the center of the axial direction “U” and has a predetermined circumferential length toward the circumferential direction “A”. The elastic body bulging piece 700-2 is a semi-cylindrical cylinder in a plan view. And as a general rule, this elastic body bulge piece 700-2 desirably has a structure that bulges in the same thickness state from the central portion 700-2b to the base end portion 700-2c (because there is another example, Will be described later). In this example, when the elastic body bulging piece 700-2 is pressed by the stay 2, although not shown, the first central portion 700-2b is pressed and approaches the peripheral surface 100b, and the hollow portion It is a structure which is pushed into 600-2 and bends, and finally (in a state where the elastic body bulge piece has moved), the inner peripheral surface 700-2b1 of the central portion 700-2b and the inner surface 100b are annular. Thus, the elastic body bulging piece 700-2 is repressed. Accordingly, the stay 2 elastically holds substantially the entire stay 2 by utilizing repulsion (repulsion against elasticity or elasticity) by the cylindrical portion 100a of the head 100 and the elastic body bulging piece 700-2. This state is shown in FIG. 8-5. In this example, as shown in FIG. 8C, the elastic body bulging piece 700-2 preferably has a structure that bulges in the same thickness state. It is also possible to make the base end portion 700-2c have a thin shape, and this thin shape is useful for facilitating the insertion of the stay 2 and preventing breakage and cracking of the elastic body bulging piece 700-2. (As another example, a structure provided on the entire circumference of the entire collection of the base end portions 700-2c is also possible). FIGS. 8-7 to 8-9 show another first example of the fourth embodiment in which the wall 700h of the elastic body bulging piece 700-2 is bent in the radial direction “ka” of the inner surface 100b. An example is shown. Others conform to this example.

[F] FIGS. 9-1 to 9-7 show a second example of the fourth embodiment described in claims 6 and 7 , and this receiving chamber 6 is a peripheral surface 100b, and its circumferential direction. It is the cavity 600-2 formed in “A” and in the axial direction “I”. The elastic body 7 bulges from the peripheral surface 100b through the wall 700h toward the center of the axial direction “U” and has a predetermined circumferential length toward the circumferential direction “A”. An elastic body bulging piece 700-2 having a semi-cylindrical shape in plan view provided in a plan view, and a pair of notched grooves 700-2g are formed in the circumferential direction “a” on the base end side 700-2c. To do. In this example, when the elastic body bulging piece 700-2 is pressed by the stay 2, although not shown, the first central portion 700-2b is pressed and approaches the peripheral surface 100b, and the hollow portion It is a structure which is pushed into 600-2 and bends, and finally (in a state where the elastic body bulge piece has moved), the inner peripheral surface 700-2b1 of the central portion 700-2b and the peripheral surface 100b are The elastic body bulging piece 700-2 is elastically pressed. Accordingly, the stay 2 elastically holds substantially the entire stay 2 by utilizing repulsion (repulsion against elasticity or elasticity) by the cylindrical portion 100a of the head 100 and the elastic body bulging piece 700-2. This state is shown in FIG. 9-6. Other than the first example of the fourth embodiment described above. FIG. 9-7 shows another second example of the fourth embodiment in which the notched groove 700-2g of the elastic projecting piece 700-1 is formed in one of the base end portions 700-2c. . Others conform to the first example of the fourth embodiment described above.

[G] FIGS. 10-1 to 10-6 are a third example of the fourth embodiment described in claims 8 and 9 , and the receiving chamber 6 has a lower surface 100c1 of the head main body 100c of the head 100. FIG. Thus, the cavity 600-2 is formed so as to extend upward in the axial direction “I” and toward the axial direction “U” (and preferably in the circumferential direction “A”). The elastic body 7 bulges from the peripheral surface 100b through the wall 700h toward the center of the axial direction “U” and has a predetermined circumferential length toward the circumferential direction “A”. This is an elastic body bulging piece 700-2 in a semi-cylindrical shape in plan view. In this example, when the elastic body bulging piece 700-2 is pressed by the stay 2, although not shown, the first central portion 700-2b is pressed and approaches the peripheral surface 100b, and the hollow portion It is a structure which is pushed into 600-2 and bends, and finally (in a state where the elastic body bulge piece has moved), the inner peripheral surface 700-2b1 of the central portion 700-2b and the peripheral surface 100b are FIG. 10-5 shows an annular state in which the elasticity of the cylindrical portion 100a of the head 100 and / or the elastic body bulging piece 700-2 is utilized and the entire stay 2 is elastically held. It is shown. Other than the second example of the fourth embodiment described above. 10-6 may be another third example of the fourth embodiment in which the wall 700h of the elastic body bulging piece 700-2 is bent in the radial direction “ka” of the peripheral surface 100b. Others conform to the second example of the fourth embodiment described above.

[H] FIGS. 11-1 to 11-5 are the fourth example of the fourth embodiment described in claim 10 , and the receiving chamber 6 is formed from the lower surface 100 c 1 of the head main body 100 c of the head 100. The cavity 600-2 is formed upward (in the axial direction “I”) and in the axial direction “U” (and preferably in the circumferential direction “A”). The elastic body 7 bulges from the peripheral surface 100b through the wall 700h toward the center of the axial direction “U” and has a predetermined circumferential length toward the circumferential direction “A”. An elastic body bulging piece 700-2 having a semi-cylindrical shape when viewed from above is formed in pairs, and a notch groove 700-2g is formed in a pair in the circumferential direction “a” of the base end 700-2c. To do. In this example, when the elastic body bulging piece 700-2 is pressed by the stay 2, although not shown, the first central portion 700-2b is pressed and approaches the peripheral surface 100b, and the hollow portion 600-2 is a structure that is pushed and bent, and finally (in a state where the elastic body bulge piece 700-2 is moved), the inner peripheral surface 700-2b1 of the central portion 700-2b, and the inner surface The elastic body bulging piece 700-2 is elastically pressed by 100b, and the repulsion (repulsion or elasticity against the elastic pressure) by the cylindrical portion 100a of the head 100 and the elastic body bulging piece 700-2 is utilized. Then, the entire stay 2 is elastically held. Other than the second example and / or the third example of the fourth embodiment described above. FIG. 11-5 shows another fourth example of the fourth embodiment in which the notched groove 700-2g of the elastic projecting piece 700-1 is formed in one of the base end portions 700-2c. . Others conform to the third example of the fourth embodiment described above.

  The stay 2 is elastically supported by the upper backlash prevention mechanism “X” described above. Thus, it is the structure which aims at preventing the play which generate | occur | produces with this stay 2 and the head 100 of the headrest support 1 by supporting elastically. That is, when the stay 2 is inserted into the through hole 3 having the elastic body 7 and the receiving chamber 6, the elastic strip 12 is expanded by the stay 2 and sequentially inserted. After this insertion, the stay 2 is elastically supported via the elastic body 7 that has been elastically restored. Through this elastic support, a rattling sound generated between the stay 2 and the head 100 is eliminated. Further, this elastic support is the same in the case of tolerance, so that the generation of rattling noise is eliminated. Also, pulling out the stay 2 does not cause any problem. Further, this kind of rattling noise is eliminated at once due to a synergistic effect with the rattling structure of the neck 101 and / or the trunk 102 described later.

  Next, the lower backlash prevention mechanism “Y” will be described. This lower backlash prevention mechanism “Y” is a cutout piece 10 provided in the neck portion 101 and / or a cutout portion provided in the trunk portion 102. An example of the portion 11 and the elastic strip 12 provided in parallel with the cutout portion 11 will be described.

  First, the lower backlash prevention mechanism “Y” relating to the neck portion 101 is provided with a notch piece 10 (separated from the neck portion 101 or thinned) extending from the rectangular outer peripheral wall 101a of the neck portion 101 along its wall surface. Provided with a protruding piece, etc., and is elastically held on the inner peripheral surface 5b of the bracket 5 through the elastic force of the notch piece 10, and constitutes a lower backlash prevention mechanism “Y”. At the same time, the structure is designed to prevent backlash at the part.

  Next, the lower backlash prevention mechanism “Y” with respect to the body portion 102 is a substantially central portion of the body portion 102, and the outer peripheral wall 102 a is provided with a notch strip portion 11 directed in the axial direction “I”. Thus, the elastic strips 12 are provided in the same direction, and the elastic strips 12 are provided in pairs in the opposite direction “o” via the notch strips 11. Accordingly, the elastic strip 12 has a pair of curved portions 12a and mountain portions 12b provided at several places on the ridges of the curved portion 12a. The curved portions 12a repress the stay 2 and The mountain portion 12 b represses the bracket 5. And since this repression is mutually repressed, between the stay 2, the headrest support 1, and the bracket 5 is complemented. As an example, the headrest support 1 provided on the bracket 5 will be described. When the stay 2 is inserted, the stay 2 presses the curved portion 12a, and the curved portion 12a and the mountain portion 12b bend in the radial direction “ka”, so that the deflection of the mountain portion 12b To do. A reaction force is transmitted from the bracket 5 to the mountain portion 12b. The transmitted reaction force is propagated to the bending portion 12a, and the stay 2 is repressed via the propagated reaction force and the repression force of the bending portion 12a itself. It is a structure that helps to prevent backlash. This backlash prevention effect can be spread to a vibration suppression effect on a person, a seat, and / or a room, which is beneficial.

  The vacant chamber portion 103 of the head 100 of the headrest support 1 is provided with an operation button 20 and a spring 21, and the urging force of the spring 21 causes the operation button 20 to be always opened on the open side of the vacant chamber portion 103. It is a structure that presses. It is to be noted that the operation button 20 is provided with a device for preventing the opening side “e” from coming off. In the figure, reference numeral 104 denotes a bowl-shaped plate portion provided on the open side “e” of the vacant portion 103. Moreover, the other structure of this headrest support 1 is based on the structure of the said literature (1) and literature (2).

  For example, as shown in FIGS. 12-1 to 12-8, the number of the elastic bodies 7 is arbitrary and is changed in consideration of the weight of the vehicle, the headrest 22, the degree of play prevention, and the like. The

FIG. 1 is an exploded perspective view showing the relationship between the vehicle and the headrest device in an exploded manner. FIG. 2 is an enlarged perspective view of the main part of the headrest device (excluding the bracket and stay). FIG. 3 is a schematic diagram showing the characteristics of the present invention, and is a chart showing the moment characteristics of the headrest support shown in Document 1 and the rattling prevention mechanism by the headrest support of the present invention. FIG. 4 is a sectional view of the main part (excluding the bracket) of the headrest device of the first embodiment. FIG. 4-1 shows the upper backlash prevention mechanism of the first embodiment described in claim 1 , and is a plan view of a through hole in the head of the headrest support. FIG. 4-2 shows an upper backlash prevention mechanism of the first embodiment described in claim 1 , and is an enlarged plan view showing the relationship between the through hole and the elastic tongue piece of FIG. 4-1. , FIG. 4-3 shows the upper backlash prevention mechanism of the first embodiment described in claim 1 , and is an AA end view of FIG. 4-1. 4-4 shows the upper backlash prevention mechanism of the first embodiment described in claim 1 , and is a cross-sectional view taken along the line BB of FIG. 4-5 shows the upper backlash prevention mechanism of the first embodiment described in claim 1 , and shows the movement of the elastic tongue piece of FIG. 4-1, and this elastic tongue is shown in FIG. Plan view showing the state of pressing the stay with one piece 4-6 is a sectional view showing another example of the AA sectional view of FIG. FIG. 5 is a cross-sectional view of the main part (excluding the bracket) of the headrest device of the second embodiment. FIG. 5-1 shows the upper backlash prevention mechanism of the second embodiment described in claim 2 , and is a plan view of the through hole in the head of the headrest support. FIG. 5-2 shows an upper backlash prevention mechanism of the second embodiment described in claim 2 , and is an enlarged plan view showing the relationship between the through hole and the elastic tongue. 5-3 shows the upper backlash prevention mechanism of the second embodiment described in claim 2 , and is an AA end view of FIG. 5-1. 5-4 shows the upper backlash prevention mechanism of the second embodiment described in claim 2 , and is a cross-sectional view taken along the line BB in FIG. 5-5 shows the upper backlash prevention mechanism of the second embodiment described in claim 2 , and is a plan view showing the movement of the elastic tongue piece of FIG. 5-6 shows the upper backlash prevention mechanism of the second embodiment described in claim 2 , and shows a state in which the elastic tongue piece of FIG. 5-4 has moved further. Plan view showing the state of pressing 5-7 is a sectional view showing another example of the AA sectional view of FIG. FIG. 6 is a sectional view of the main part (excluding the bracket) of the headrest device of the first example of the third embodiment. FIG. 6A shows an upper backlash preventing mechanism which is a first example of the third embodiment described in claims 3 and 4 , and is a plan view of a through hole in a headrest support head. FIG. 6-2 shows an upper backlash prevention mechanism which is a first example of the third embodiment described in claims 3 and 4 , and shows the relationship between the through hole and the elastic protrusion in FIG. Enlarged plan view FIG. 6-3 shows an upper backlash preventing mechanism which is a first example of the third embodiment described in claims 3 and 4 , and is an AA end view of FIG. 6-1. 6-4 shows an upper backlash preventing mechanism which is a first example of the third embodiment described in claims 3 and 4 , and is a cross-sectional view taken along line BB in FIG. 6-5 shows an upper backlash preventing mechanism which is a first example of the third embodiment described in claims 3 and 4 , and shows the movement of the elastic tongue piece of FIG. 6-4. There is a plan view showing the state of pressing the stay with this elastic tongue FIG. 6-6 is a cross-sectional view showing another example of the BB cross-sectional view of FIG. 6-4 FIG. 7 is a cross-sectional view of the main part (excluding the bracket) of the headrest device of the second example of the third embodiment. FIG. 7-1 shows an upper backlash prevention mechanism which is a second example of the third embodiment described in claims 3 and 4 , and is a plan view of a through hole in the headrest support head. FIG. 7-2 shows an upper backlash preventing mechanism which is a second example of the third embodiment described in claims 3 and 4. The relationship between the through hole and the elastic protrusion in FIG. Enlarged plan view FIG. 7-3 shows an upper backlash preventing mechanism which is a second example of the third embodiment described in claims 3 and 4 , and is an AA end view of FIG. 7-1. FIG. 7-4 shows an upper backlash preventing mechanism which is a second example of the third embodiment described in claims 3 and 4 , and is a cross-sectional view taken along line BB in FIG. FIG. 7-5 shows an upper backlash preventing mechanism which is a second example of the third embodiment described in claims 3 and 4 , and shows the movement of the elastic tongue piece of FIG. 7-4. There is a plan view showing the state of pressing the stay with this elastic tongue 7-6 is a cross-sectional view showing another example of the BB cross-sectional view of FIG. 7-4 FIG. 8-1 shows an upper backlash prevention mechanism which is a first example of the fourth embodiment described in claim 5 , and is a plan view of a through hole in the head of the headrest support. FIG. 8-2 shows an upper backlash preventing mechanism which is a first example of the fourth embodiment described in claim 5 , and is an enlarged plan view showing the relationship between the through hole and the elastic protrusion. FIG. 8-3 shows an upper backlash preventing mechanism which is a first example of the fourth embodiment described in claim 5 , and is an AA end view of FIG. 8-2. 8-4 shows an upper backlash preventing mechanism which is a first example of the fourth embodiment described in claim 5 , and is a cross-sectional view taken along line BB in FIG. 8-3. 8-5 shows an upper backlash preventing mechanism which is a first example of the fourth embodiment described in claim 5 , and is a cross-sectional view taken along the line CC in FIG. 8-3. FIG. 8-6 shows the movement of the elastic tongue, and a plan view showing a state in which the stay is pressed by the elastic tongue. 8-7 is a cross-sectional view showing another example of the AA end view of FIG. 8-2 8-8 is a sectional view showing still another example of the CC sectional view of FIG. 8-3. 8-9 is a sectional view showing still another example of the CC sectional view of FIG. 8-3. FIG. 9-1 shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and is a plan view of a through hole in the head of the headrest support. FIG. 9A shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7, and expands the relationship between the through hole and the elastic protrusion in FIG. Plan view shown FIG. 9-3 shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and is an AA end view of FIG. 9-2. FIG. 9-4 shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and is a cross-sectional view taken along line BB in FIG. 9-3. 9-5 shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and is a cross-sectional view taken along the line CC in FIG. 9-3. FIG. 9-6 shows an upper backlash preventing mechanism which is a second example of the fourth embodiment described in claims 6 and 7 , and shows the movement of the elastic tongue piece. Top view showing the state of pressing the stay with the tongue 9-7 is a sectional view showing another example of the AA end view of FIG. 9-2 FIG. 10-1 shows an upper backlash prevention mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and is a plan view of the through hole in the headrest support head. FIG. 10-2 shows an upper backlash prevention mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and shows the relationship between the through hole and the elastic protrusion in FIG. 10-1. Enlarged plan view 10-3 shows an upper backlash preventing mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and is an end view taken along line AA in FIG. 10-2. 10-4 shows an upper backlash preventing mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and is a cross-sectional view taken along line BB in FIG. 10-3. FIG. 10-5 shows an upper backlash preventing mechanism which is a third example of the fourth embodiment described in claims 8 and 9 , and shows the movement of the elastic tongue piece. Top view showing the state of pressing the stay with the tongue 10-6 is a sectional view showing another example of the AA end view of FIG. 10-2 FIG. 11A is a plan view of an upper backlash prevention mechanism which is a fourth example of the fourth embodiment described in claim 10 , and is a head through hole in the headrest support. FIG. 11-2 shows an upper backlash prevention mechanism which is a fourth example of the fourth embodiment described in claim 10 , and expands the relationship between the through hole and the elastic protrusion in FIG. 11-1. Plan view shown 11-3 shows an upper backlash prevention mechanism which is a fourth example of the fourth embodiment described in claim 10 , and is an end view taken along line AA of FIG. 11-2. 11-4 shows an upper backlash preventing mechanism which is a fourth example of the fourth embodiment described in claim 10 , and is a cross-sectional view taken along the line BB of FIG. 11-3. 11-5 is a cross-sectional view showing another example of the BB cross-sectional view of FIG. 11-3 FIG. 12-1 is an enlarged plan view showing each example in which a plurality of elastic bodies according to each embodiment described above are provided. FIG. 12-2 is an enlarged plan view showing each example in which a plurality of elastic bodies according to each embodiment described above are provided. FIG. 12-3 is an enlarged plan view showing each example in which a plurality of elastic bodies according to the above-described embodiments are provided. FIG. 12-4 is an enlarged plan view showing each example in which a plurality of elastic bodies according to the above-described embodiments are provided. FIG. 12-5 is an enlarged plan view showing each example in which a plurality of elastic bodies according to the above-described embodiments are provided. FIG. 12-6 is an enlarged plan view showing each example in which a plurality of elastic bodies according to each example described above are provided. FIG. 12-7 is an enlarged plan view showing each example in which a plurality of elastic bodies according to each example described above are provided. FIG. 12-8 is an enlarged plan view showing each example in which a plurality of elastic bodies according to each example described above are provided.

DESCRIPTION OF SYMBOLS 1 Headrest support 100 Head part 100a Tube part 100a1 Lower surface 100b Circumferential surface 100c Head main body part 100c1 Lower surface 101 Neck part 101a Outer wall 102 Body part 102a Outer wall 103 Empty part 104 Plate part 2 Stay 3 Through hole 5 Bracket 5a Inner circumference 5b Inner circumference 5b Surface 6 Receiving room (accepting means)
600 notch portion 600a step portion 600-2 cavity portion 7 elastic body 700 elastic body tongue piece 700a distal end portion 700b central portion 700b1 inner surface side 700c base end portion 700d R surface 700e anti-R surface 700f free end 700h wall 700-1 elastic body Projection piece 700-1a Front end portion 700-1b Central portion 700-1b1 Inner surface side 700-1c Base end portion 700-1d R surface 700-1e Anti-R surface 700-1f Free end 700-2 Elastic body bulge piece 700-2c Base end portion 700-2b Central portion 700-2b1 Inner peripheral surface 700-2c Base end portion 700-2g Notched groove 10 Notched piece 11 Notched strip portion 12 Elastic strip 12a Curved portion 12b Mountain portion 20 Operation button 21 Spring 22 Headrest “A” Circumferential direction “I” Axial direction “U” Axle core direction “E” Open side “O” Opposite direction “K” Morphism direction C the seatback C1 frame "X" above the backlash preventing mechanism "Y" under the anti-backlash mechanism

Claims (10)

A headrest support that is formed so as to be able to be supported by a receiving member disposed in a seat by inserting and holding a headrest stay provided with a headrest disposed above the seat back,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
The upper part which consists of the elastic body for stay pressing provided toward the surrounding surface of the said through-hole of the said head , and the receiving chamber of the notch part which received this elastic body and formed toward the surrounding surface of the said through-hole The rattle prevention mechanism,
Headrest support with anti- rattle mechanism. A headrest support that is formed so as to be able to be supported by a receiving member disposed in a seat by inserting and holding a headrest stay provided with a headrest disposed above the seat back,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed on the peripheral surface of the through hole, and the elastic body is an elastic member protruding from the peripheral surface toward the through hole through a wall at a position corresponding to the notch. A headrest support with a rattle prevention mechanism that is configured as a body tongue . A headrest support that is formed so as to be able to be supported by a receiving member disposed in a seat by inserting and holding a headrest stay provided with a headrest disposed above the seat back,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notched portion with a step formed toward the peripheral surface of the through hole, and the elastic body is an elastic protruding toward the peripheral surface at a position corresponding to the notched portion with the step. A headrest support with a rattle prevention mechanism that is configured as a body tongue. A headrest support that is formed so as to be able to be supported by a receiving member disposed in a seat by inserting and holding a headrest stay provided with a headrest disposed above the seat back,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a notch formed in the peripheral surface of the through hole, and the elastic body is a peripheral surface of the through hole at a position corresponding to the notch and is directed upward from below. A headrest support equipped with a backlash prevention mechanism configured to be an elastic projecting piece bulged and formed. The headrest support according to claim 4 ,
A headrest support provided with a backlash prevention mechanism in which the tip of the elastic projection piece is thin. A headrest support that is formed so as to be able to be supported by a receiving member disposed in a seat by inserting and holding a headrest stay provided with a headrest disposed above the seat back,
The headrest support is composed of a head, a neck having a smaller diameter than the head, provided below the head, and a trunk having a diameter smaller than the neck provided below the neck. ,
From this head, the neck, as well as a through hole for stay insertion that extends through the trunk,
A notch piece for pressing the bracket formed on the neck, and a lower backlash prevention mechanism comprising a pair of stays and / or an elastic strip for pressing the bracket in the longitudinal direction of the body,
An upper backlash prevention mechanism comprising an elastic body for stay pressing provided on the peripheral surface of the through hole of the head, and a receiving chamber for receiving the elastic body;
In the headrest support with a rattle prevention mechanism consisting of
The receiving chamber is a cavity formed in the through hole through a wall, and the elastic body is formed in a position corresponding to the cavity from the peripheral surface of the through hole in the axial direction. A headrest support provided with a rattle prevention mechanism configured to be an elastic bulging piece. The headrest support according to claim 6 ,
A headrest support provided with a backlash prevention mechanism in which a distal end portion of the elastic body bulging piece is separated from an inner surface. The headrest support according to claim 1,
The elastic body includes an elastic body bulging piece projecting from the peripheral surface of the through hole through the wall in the axial direction of the through hole, and a cavity provided in the neck portion forming the elastic body bulging piece Headrest support with anti-rattle mechanism configured as a hole. The headrest support according to claim 8 ,
A headrest support provided with a backlash prevention mechanism in which a distal end portion of the elastic body bulging piece is separated from an inner surface. The headrest support according to claim 1,
A headrest support provided with a backlash prevention mechanism in which a plurality of the receiving chamber and the elastic body are provided.

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