JP2008093364A - Headrest support provided with rattle preventing mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest support provided with a rattle preventing mechanism for a whole headrest device such as a headrest and/or a headrest stay (hereafter called a stay), in particular, the rattle preventing mechanism by the headrest support and the stays. <P>SOLUTION: The headrest support 1, constituted of a head part, a neck part and a barrel part disposed on a seat, is provided with the rattle preventing mechanism composed of resilient strips for pressing a bracket 5 formed on the neck part and a pair of resilient strips for pressing the stays disposed in the longitudinal direction of the barrel part, and the rattle preventing mechanism constituted of through holes 3 for inserting the stays penetrating from upward to downward of the headrest support 1 and elastomers for pressing the stays disposed around the through holes 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rattling prevention mechanism for the entire headrest device such as a headrest and / or a headrest stay (referred to as a stay), and more particularly to a headrest support provided with a rattle prevention mechanism using a headrest support and a stay.

  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 an industry pioneer and a standard product.

  Based on the above reality, the excellent structure will be described with confidence. Reference (1) is “Headrest Support” in Japanese Patent Laid-Open No. 11-89665, and Reference (2) is Japanese Patent Application Laid-Open No. 2006-198226. “Headrest support and lock member assembled to the headrest support”. The product is mainly an implementation product of Document (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. In this way, the stay is elastically supported. First, the headrest support and the stay are prevented from loosening in the fitted state and / or the assembled state, and these loosenesses are prevented. In addition to improving the quietness of the time, eliminating the problem of tolerance between the headrest support and the stay on the manufacturing side, and further, the tolerance between the headrest support and the stay is not affected by variations in tolerance due to temperature changes. It is intended to prevent backlash.

  Reference (2) is a structure intended to further prevent backlash in the structure of Reference (1), and the second and third stay pressing portions (members protruding toward the center of the stay through hole) are provided on the neck. It is mainly intended to prevent backlash at the neck.

JP-A-11-89665 JP 2006-198226

  The references (1) and (2) are designed to prevent backlash between the headrest support and the stay. However, since the structure mainly includes the body and the neck, There is room for improvement.

  And in recent years, in view of the situation where the above-described improvement in quietness and the prevention of backlash due to tolerances are desired, the improvement in the above-mentioned literatures (1) and (2) and these literatures (1) and (2) were proposed. It is intended to propose a structure suitable for mass production that makes effective use of the structure, or a headrest support that is easy to assemble and manufacture, and has convenience.

  The invention of claim 1 is configured to prevent rattling between the headrest support and the stay, and intends to propose a rattling prevention mechanism in the head of the headrest support. This proposal intends to provide a headrest support equipped with a backlash prevention mechanism that can be upgraded further without changing the structure of the conventional backlash prevention mechanism. By proposing this head, the headrest support can be prevented from being loosened as a whole, and quietness can be secured and adverse effects can be eliminated.

Claim 1 is a headrest support that is formed so as to be able to support and hold a headrest that is disposed above the seat, and that is supported by a receiving member that is disposed in the seat.
The headrest support is composed of a head, a neck portion having a smaller diameter than the head portion provided below the head portion, and a trunk portion having a step diameter smaller than the neck portion provided below the neck portion. And
A rattle prevention mechanism comprising a notch piece for bracket pressing formed on the neck part, and an elastic band piece for stay pressing provided in pairs in the longitudinal direction of the body part,
A stay insertion hole penetrating downward from above the headrest support; and
An elastic body for stay pressing provided around the through hole;
It is a headrest support provided with the rattle prevention mechanism comprised by.

  The invention of claim 2 is intended to achieve the object of claim 1 and to propose an optimal head stay pressing structure for achieving this object.

Claim 2 is the headrest support according to claim 1,
The stay pressing elastic body provided in the periphery of the through hole is an annular elastic body having a stepped portion in the upper opening of the through hole of the headrest support and having an elastic bulging portion provided in the stepped portion. It is a headrest support provided with the configured rattle prevention mechanism.

  The invention of claim 3 is to achieve the object of claim 1 and to provide an optimal head stay pressing structure for achieving this object, and this stay pressing structure is intended to be an elastic strip. To do.

Claim 3 is the headrest support according to claim 1,
The stay pressing elastic body provided in the periphery of the through hole includes a backlash prevention mechanism in which one or a plurality of elastic strips standing in an integrated shape are provided above the through hole of the headrest support. Headrest support.

  The invention of claim 4 achieves the object of claim 3, and is a head pressing structure for the head that is optimal for achieving the object, and the stay pressing structure is an elastic strip / buffer material. Is intended.

Claim 4 is the headrest support according to claim 3,
The headrest support includes a backlash prevention mechanism configured to fill a cushioning material having an elastic characteristic between the elastic strip and the upper opening.

  The invention of claim 5 achieves the object of claim 3 and is a head pressing structure for the head that is optimal for achieving the object, and the stay pressing structure is intended to be an elastic strip. To do.

Claim 5 is the headrest support according to claim 3,
The elastic strip provided in the upper opening of the through hole of the headrest support has a backlash prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Headrest support.

  The invention of claim 6 is to achieve the object of claim 1 and to provide a head stay pressing structure that is optimal for achieving the object, and this stay pressing structure is intended to be an annular elastic body. To do.

Claim 6 is the headrest support according to claim 1,
The elastic body for pressing the stay provided in the periphery of the through hole is a headrest support having a backlash prevention mechanism in which an annular elastic body having an elastic strip is fitted to the upper opening of the through hole of the headrest support. It is.

  The invention of claim 7 achieves the object of claim 6, and is a head pressing structure for the head that is optimal for achieving the object, and the stay pressing structure is an annular elastic body / buffer material. Is intended.

Claim 7 is the headrest support according to claim 6,
The headrest support includes a backlash prevention mechanism configured to fill a cushioning material having elastic characteristics between the annular elastic body and the upper opening.

  The invention of claim 8 achieves the object of claim 6 and is a head pressing structure for the head that is optimal for achieving this object, and this stay pressing structure is intended to be an annular elastic body. To do.

Claim 8 is the headrest support according to claim 6,
The ring-shaped elastic body fitted into the upper opening of the through hole of the headrest support has a rattling prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Headrest support provided.

  The invention of claim 9 achieves the object of claim 6, and the stay pressing structure of the head most suitable for achieving the object is an annular elastic body, and the annular elastic body and the bottom of the upper opening It is intended to propose a structure.

Claim 9 is the headrest support according to claim 6,
A headrest support provided with a ratchet prevention mechanism in which a fitting groove is formed in the bottom of the annular elastic body and the upper opening, and the lower end of the annular elastic body is locked in the fitting groove.

The invention of claim 1 is a headrest support that is fitted and held in a headrest disposed above a seat 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 that is one step smaller in diameter than the head, and a body that is one step smaller in diameter than the neck provided below the head.
A backlash prevention mechanism comprising a notch piece for bracket pressing formed on the neck part, and an elastic band piece for stay pressing provided in pairs in the longitudinal direction of the body part,
A through hole for inserting a stay penetrating downward from above the headrest support;
An elastic body for stay pressing provided around the through hole;
It is a headrest support provided with the rattle prevention mechanism comprised by.

  Accordingly, the first aspect of the present invention is configured to prevent the headrest support and the stay from rattling, and is characterized in that a backlash prevention mechanism in the head of the headrest support can be proposed. Further, this proposed structure has an advantage that it can provide a headrest support equipped with a backlash prevention mechanism that can be upgraded further without changing the structure of the conventional backlash prevention mechanism. By proposing this head, there is a feature that it is possible to prevent the play of the entire headrest support, to ensure quietness and to eliminate the adverse effects of tolerance.

The invention of claim 2 is the headrest support according to claim 1,
The stay pressing elastic body provided in the periphery of the through hole is formed of an annular elastic body having a stepped portion at the upper opening of the through hole of the headrest support and an elastic bulging portion provided in the stepped portion. This is a headrest support having a backlash prevention mechanism.

  Accordingly, the second aspect has features such that the object of claim 1 can be achieved, and a head stay pressing structure optimal for achieving the object can be proposed.

Invention of Claim 3 is the headrest support of Claim 1,
The stay pressing elastic body provided in the periphery of the through hole includes a backlash prevention mechanism in which one or a plurality of elastic band pieces standing in an integrated shape are provided in the upper opening of the through hole of the headrest support. Headrest support.

  Therefore, the third aspect of the present invention is a head pressing structure for the head that is optimal for achieving the object of the first aspect, and includes a backlash prevention mechanism using the stay pressing structure as an elastic strip. It has the feature that the headrest support which can be proposed is proposed.

Invention of Claim 4 is the headrest support of Claim 3,
It is a headrest support provided with a backlash prevention mechanism configured to be filled with a cushioning material having elastic characteristics between the elastic strip and the upper opening.

  Accordingly, the fourth aspect of the present invention is the head pressing structure of the head that is capable of achieving the object of the third aspect and is optimal for achieving the object, and prevents the backlash using the stay pressing structure as an elastic band piece / buffer material. It has the feature that a headrest support provided with a mechanism can be proposed.

Invention of Claim 5 is the headrest support of Claim 3, Comprising:
The elastic band provided at the upper opening of the through hole of the headrest support is a headrest provided with a rattle prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Support.

  Accordingly, the fifth aspect of the present invention can achieve the object of the third aspect, and is a head stay pressing structure that is optimal for achieving the object, and includes a backlash prevention mechanism that uses the stay pressing structure as an elastic band piece. It has the feature that the headrest support which can be proposed is proposed.

The invention of claim 6 is the headrest support according to claim 1,
The elastic body for pressing the stay provided around the through hole is a headrest support provided with a backlash prevention mechanism in which an annular elastic body provided with an elastic band piece is fitted to the upper opening of the through hole of the headrest support. It is.

  Accordingly, the sixth aspect of the present invention can achieve the object of the first aspect, and is a head stay pressing structure that is optimal for achieving the object, and includes a backlash prevention mechanism using the stay pressing structure as an annular elastic body. It has the feature that the headrest support which can be proposed is proposed.

The invention of claim 7 is the headrest support according to claim 6,
The headrest support includes a backlash prevention mechanism configured to fill a buffer material having elastic characteristics between the annular elastic body and the upper opening.

  Accordingly, the seventh aspect of the present invention is the head pressing structure of the head that can achieve the object of the sixth aspect and is optimal for achieving the object, and prevents the play using the stay pressing structure as an annular elastic body / buffer material. It has the feature that a headrest support provided with a mechanism can be proposed.

The invention of claim 8 is the headrest support according to claim 6,
The annular elastic body fitted into the upper opening of the through hole of the headrest support has a backlash prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Headrest support.

  Accordingly, the eighth aspect of the present invention can achieve the object of the sixth aspect, and is a head stay pressing structure that is optimal for achieving the object, and includes a backlash prevention mechanism that uses the stay pressing structure as an annular elastic body. It has the feature that the headrest support which can be proposed is proposed.

The invention of claim 9 is the headrest support according to claim 6,
The headrest support includes a ring-shaped elastic body and a backlash prevention mechanism in which a fitting groove is formed at the bottom of the upper opening, and the lower end of the ring-shaped elastic body is locked in the fitting groove.

  Accordingly, claim 9 can achieve the object of claim 6, and the optimum stay pressing structure of the head for achieving this object is an annular elastic body, and the annular elastic body and the bottom of the upper opening are provided. It has the feature that a headrest support provided with the provided play prevention mechanism can be proposed.

  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 cross-sectional view of the main part (excluding the bracket) of the headrest device of the first embodiment, FIG. 4 is an enlarged plan view of the head of the first embodiment, and FIG. FIG. 5-2 is an enlarged sectional view, FIG. 5-2 is an enlarged sectional view showing the relationship between the head and stay of the first embodiment, FIG. 6-1 is an enlarged sectional view of another head of the first embodiment, and FIG. 2 is an enlarged cross-sectional view showing the relationship between the other head and the stay of the first embodiment, FIG. 7 is a cross-sectional view of the main part (excluding the bracket) of the headrest device of the second embodiment, and FIG. Is an enlarged sectional view of the head of the second embodiment, FIG. 8-2 is an enlarged sectional view showing the relationship between the head of the second embodiment and the stay, and FIG. 9-2 is an enlarged cross-sectional view of another head of the second embodiment, FIG. 9-2 is an enlarged cross-sectional view showing the relationship between the other head of the second embodiment and the stay, and FIG. 10 is a diagram of the headrest device of the third embodiment. FIG. 11-1 is an enlarged sectional view of the head of the third embodiment, and FIG. 11-2 is an enlarged view showing the relationship between the head and the stay of the third embodiment. FIG. 12-1 is an enlarged sectional view of another head of the third embodiment, FIG. 12-2 is an enlarged sectional view showing the relationship between the other head of the third embodiment and the stay, FIG. Is an enlarged plan view of the head of the fourth embodiment, FIG. 14-1 is an enlarged sectional view of the head of the fourth embodiment, and FIG. 14-2 shows the relationship between the head and the stay of the fourth embodiment. 14-3 is an enlarged sectional view of the head of another fourth embodiment of FIG. 14-1, FIG. 15-1 is an enlarged sectional view of another head of the fourth embodiment, FIG. 2 of the fourth embodiment FIG. 16-1 is an enlarged cross-sectional view of the head of the fifth embodiment, and FIG. 16-2 shows the relationship of the head and stay of the fifth embodiment. FIG. 17-1 is an enlarged sectional view of another head of the fifth embodiment, and FIG. 17-2 is an enlarged sectional view showing the relationship between the other head of the fifth embodiment and the stay. 18-1 is an enlarged sectional view of the head of the sixth embodiment, FIG. 18-2 is an enlarged sectional view showing the relationship between the head of the sixth embodiment and the stay, and FIG. 19-1 is the sixth embodiment. Fig. 19-2 is an enlarged cross-sectional view of another example of the head, Fig. 19-2 is an enlarged cross-sectional view showing the relationship between the other head of the sixth embodiment and the stay, and Fig. 20 is an enlarged plan view of the head of the seventh embodiment. FIG. 21-1 is an enlarged sectional view of the head of the seventh embodiment, FIG. 21-2 is an enlarged sectional view showing the relationship between the head of the seventh embodiment and the stay, and FIG. Example of other head enlargement FIG. 22-2 is an enlarged sectional view showing the relationship between the other head of the seventh embodiment and the stay, FIG. 23-1 is an enlarged sectional view of the head of the eighth embodiment, and FIG. 23-2. Is an enlarged sectional view showing the relationship between the head and stay of the eighth embodiment, FIG. 24-1 is an enlarged sectional view of another head of the eighth embodiment, and FIG. 24-2 is another of the eighth embodiment. It is the expanded sectional view which showed the relationship between a head and a stay.

  FIGS. 25-1 and 25-2 show a configuration in which an elastic means is provided on the inner peripheral surface of the upper opening, and FIG. 25-1 shows a structure of a single or n-shaped bulge strip in the ninth embodiment. FIG. 25-2 is an enlarged sectional view of another configuration of the ninth embodiment, FIG. 25-2 is an enlarged sectional view of a structure composed of a spring and a sphere, and FIG. 26-1 is a swollen band of one or n strips of the tenth embodiment. 26-2 is an enlarged sectional view of the structure of the piece, FIG. 26-2 is an enlarged sectional view showing a mold for molding FIG. 26-1, and FIG. 26-3 is another configuration of the tenth embodiment, which is composed of a spring and a sphere. FIG. 26-4 is an enlarged cross-sectional view showing another mold for forming FIG. 26-1.

  FIGS. 27-1 to 27-4 show the backrest prevention between the headrest support and the bracket provided on the frame. FIG. 27-1 shows the cutout piece on one side, and the other three places are normal cutout pieces. FIG. 27-2 is a cross-sectional view showing a cutout piece on both sides, and the other two locations are cross-sectional views showing a normal cutout piece in plan view, and FIG. A sectional view showing this state in plan view, with a hole formed in one connection part of the notch piece, FIG. 27-4 is a plan view showing this state in which two holes are provided in the connection part of the notch piece. It is sectional drawing seen.

  The headrest support 1 of the present invention is integrally molded with a resin such as polypropylene, for example, and has a structure having a through-hole 3 for inserting a headrest stay (to be a stay) 2 therein. As shown in FIG. 3, FIG. 7, or FIG. 10, the head 100, the neck 101, and the body 102 are configured. The head 100 has a substantially square shape in plan view, and has a rounded outer peripheral surface of its four sides, and its surface area is wider than the neck 101 and the trunk 102. ing. Then, the entire neck portion 101 of the headrest support 1 and a part of the trunk portion 102 are fitted into a bracket 5 having a substantially rectangular shape provided in a pair with the frame C1 of the seat back C as shown in FIG. Then, the lower surface 100 a 1 of the cylinder portion 100 a of the head 100 is bumped to the upper surface 5 a of the bracket 5.

  An elastic body 6 for pressing the stay is provided in the upper opening 100b of the cylindrical portion 100a of the head 100. The upper opening 100b is larger than the through hole 3 formed in the cylindrical portion 100a, and a stepped portion 100b1 is formed therebetween. Each example of the stay pressing elastic body 6 provided in the upper opening 100b will be described below with respect to the first to eighth examples.

  An example of the first embodiment is an enlarged plan view of the head of the first embodiment of FIG. 4, an enlarged sectional view of the head of the first embodiment of FIG. 5-1, and the first embodiment of FIG. As shown in the enlarged sectional view showing the relationship between the head and the stay, the elastic band 600 is provided in the upper opening 100b, and the bulging portion is curved at one or several places of the elastic band 600. 600a is formed toward the center of the through hole 3, and the stay 2 is elastically supported via the elastic strip 600 and / or the bulging portion curve 600a. 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 provided with the elastic strip 600, the elastic strip 600 is expanded by the stay 2 and sequentially inserted. After this insertion, the stay 2 is elastically supported via the elastic strip 600 that has been elastically restored. Through this elastic support, a rattling sound generated between the stay 2 and the head 100 is eliminated. Note that 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. And this kind of rattling noise is eliminated at once due to a synergistic effect with the conventional structure for preventing the rattle of the neck 101 and / or the trunk 102. Although not shown, the elastic strip 600 may be provided on the upper and lower portions of the cylindrical portion 100a (the same applies to the other embodiments). The elastic strip 600 has a structure in which the base end side is integrally provided on the stepped portion 100b1 as shown in FIGS. 5-1, 6-1, 11-1, 12-1, etc. −1, as shown in FIG. 9A, the stepped portion 100b1 has a fitting structure or the like. The free end side (upper side) is free. However, it is also possible to integrate the free end side with a connecting body such as a ring to improve strength and tighten tightening (the same applies to other embodiments).

  Further, another example of the first embodiment is an enlarged cross-sectional view of the other head of the first embodiment of FIG. 6-1, and the relationship between the other head of the first embodiment of FIG. 6-2 and the stay. In order to further give an elastic function to the configuration of the first embodiment, a cushioning material 8 (with a cushioning material) 8 having an elastic characteristic is inserted or press-fitted. It is a structure provided by means such as insertion and press-fitting. The operation and handling of the head 100 of the headrest support 1 and the stay 2 are the same as those in the first embodiment described above, but the elastic effects and the features such as backlash prevention are the same as those in the first embodiment. It is considered to surpass one example.

  An example of the second embodiment is shown in an enlarged sectional view of the head of the second embodiment of FIG. 8-1, and an enlarged sectional view showing the relationship between the head and the stay of the second embodiment of FIG. The upper opening 100b is provided with an annular elastic body 601. The lower side of the annular elastic body 601 is engaged with a mounting groove 100b2 provided in a stepped portion 100b1 of the upper opening 100b. The structure is securely attached to 100b. The stay 2 is elastically supported via the annular elastic body 601. 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 provided with the annular elastic body 601, the annular elastic body 601 is expanded by the stay 2 and sequentially inserted. After this insertion, the stay 2 is elastically supported via the annular elastic body 601 that has been elastically restored. Through this elastic support, a rattling sound generated between the stay 2 and the head 100 is eliminated. Note that 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. And this kind of rattling noise is eliminated at once due to a synergistic effect with the conventional structure for preventing the rattle of the neck 101 and / or the trunk 102. The annular elastic body 601 is integrally provided with its lower side locked to the mounting groove 100b2. And although a free end side (upper side) is integrally formed by the connection bodies, such as cyclic | annular form, it is also possible to make it free (same also about each other Example).

  Furthermore, another example of the second embodiment is an enlarged cross-sectional view of the other head of the second embodiment of FIG. 9-1, and the relationship between the other head of the second embodiment of FIG. 9-2 and the stay. As shown in the enlarged sectional view, the structure of the second embodiment has a structure in which the cushioning material 8 is provided by means of insertion, press-fitting, insertion, press-fitting or the like in order to further give an elastic function. . The operation and handling of the head 100 and the stay 2 of the headrest support 1 are the same as in the example of the second embodiment described above, but the elastic effects and the features such as backlash prevention are the same as those in the second embodiment. It is thought that it surpasses one example.

  An example of the third embodiment is shown in an enlarged sectional view of the head of the third embodiment of FIG. 11-1, and an enlarged sectional view showing the relationship between the head and the stay of the third embodiment of FIG. 11-2. The third embodiment draws the flow of the elastic strip 600 of the first embodiment described above, and its outline is in accordance with the elastic strip 600 described above. The shape is different. Furthermore, another example of the third embodiment is an enlarged sectional view of another head of the third embodiment of FIG. 12-1, and the relationship between the other head of the third embodiment of FIG. 12-2 and the stay. The other example of the third embodiment is similar to the other example of the first embodiment and the example of the third embodiment.

  An example of the fourth embodiment is an enlarged plan view of the head of the fourth embodiment of FIG. 13, an enlarged cross-sectional view of the head of the fourth embodiment of FIG. 14-1, and the fourth embodiment of FIG. 14-2. As shown in the enlarged sectional view showing the relationship between the head and the stay, the fourth embodiment draws the flow of the elastic strip 600 of the first embodiment, and the outline thereof is described above. However, in this example, the bent shape is different, and there are a large number and a taper shape upward. The configuration, operation, and / or operation of the fourth embodiment are the same as those of the elastic strip 600 of the first embodiment. 14-3 is an example in which the elastic strip 600 of FIG. 14-1 has a plurality of strips (n strips), and it is possible to improve the strength of the elastic strip 600 and strengthen tightening. (Other examples are the same).

  Furthermore, another example of the fourth embodiment is an enlarged cross-sectional view of another head of the fourth embodiment of FIG. 15-1, and the relationship between the other head of the fourth embodiment of FIG. 15-2 and the stay. The other example of the fourth embodiment is similar to the other example of the first embodiment and the example of the fourth embodiment.

  An example of the fifth embodiment is shown in an enlarged sectional view of the head of the fifth embodiment of FIG. 16-1, and an enlarged sectional view showing the relationship between the head and the stay of the fifth embodiment of FIG. 16-2. In this fifth embodiment, the flow of the elastic strip 600 of the first embodiment is drawn, and the outline is based on the elastic strip 600 described above. The shape is different, and there are many and curved structures. The configuration, operation, and / or operation of the fifth embodiment are the same as those of the elastic strip 600 of the first embodiment. Another example of the fifth embodiment is an enlarged cross-sectional view of another head of the fifth embodiment of FIG. 17-1, and the relationship between the other head of the fifth embodiment of FIG. 17-2 and the stay. The other example of the fifth embodiment is similar to the other example of the first embodiment and the example of the fifth embodiment.

  An example of the sixth embodiment is shown in an enlarged sectional view of the head of the sixth embodiment of FIG. 18-1, and an enlarged sectional view showing the relationship between the head and the stay of the sixth embodiment of FIG. 18-2. The sixth embodiment draws the flow of the elastic strip 600 of the first embodiment described above, and its outline is in accordance with the elastic strip 600 described above. The shape is different, and there are a large number of curves and curved structures (curves that expand toward the opening side “upward in the drawing”). The configuration, operation, and / or operation of the sixth embodiment are the same as those of the elastic strip 600 of the first embodiment. Another example of the sixth embodiment is an enlarged cross-sectional view of another head of the sixth embodiment of FIG. 19-1, and the relationship between the other head of the sixth embodiment of FIG. 19-2 and the stay. The other example of the sixth embodiment is similar to the other example of the first embodiment and the example of the sixth embodiment.

  An example of the seventh embodiment is an enlarged plan view of the head of the seventh embodiment of FIG. 20, an enlarged cross-sectional view of the head of the seventh embodiment of FIG. 21-1, and the seventh embodiment of FIG. As shown in the enlarged cross-sectional view showing the relationship between the head and the stay, the seventh embodiment draws the flow of the annular elastic body 601 of the second embodiment described above. However, in this example, one or a plurality of bulging ridges are provided at the center. The configuration, operation, and / or operation of the seventh embodiment are the same as those of the annular elastic body 601 of the second embodiment described above. Another example of the seventh embodiment is an enlarged sectional view of another head of the seventh embodiment of FIG. 22-1, and shows the relationship between the other head of the seventh embodiment of FIG. 22-2 and the stay. It is shown in the enlarged cross-sectional view and corresponds to another example of the second embodiment described above and one example of the seventh embodiment.

  An example of the eighth embodiment is shown in an enlarged cross-sectional view of the head of the eighth embodiment of FIG. 23-1, and an enlarged cross-sectional view showing the relationship between the head and the stay of the eighth embodiment of FIG. 23-2. The eighth embodiment draws the flow of the annular elastic body 601 of the second embodiment described above, and its outline conforms to the above-described annular elastic body 601, but in this example, its center This is a structure in which one or a plurality of bulging mountain portions are provided in the portion. The configuration, operation, and / or operation of the eighth embodiment are the same as those of the annular elastic body 601 of the second embodiment described above. Another example of the eighth embodiment is an enlarged cross-sectional view of another head of the eighth embodiment of FIG. 24-1, and shows the relationship between the other head of the eighth embodiment of FIG. 24-2 and the stay. It is shown in the enlarged sectional view and corresponds to another example of the second embodiment described above and one example of the eighth embodiment.

  The elastic strip 600 is configured to be provided integrally with the upper opening 100b, but may be provided as a separate part part in the upper opening 100b. The annular elastic body 601 is configured to be provided as a separate part part in the upper opening 100b, but can be provided integrally in the upper opening 100b.

  Next, the neck portion 101 is provided with one or several notch pieces 10 (separated from the neck portion 101 or thin projection pieces) that are elastically held by the bracket 5. When inserted into the bracket 5, the notched piece 10 is pressed to prevent backlash.

  Further, the body portion 102 is provided with an elastic strip 12 in the same direction through a notch portion 11 directed in the longitudinal direction (arrow “I”), and through the notch portion 11. The elastic strips 12 are provided in pairs in an opposing relationship (arrow “b”). The elastic strip 12 has a curved portion 12 a and a mountain portion 12 b, the curved portion 12 a represses the stay 2, and the mountain portion 12 b represses the bracket 5. Then, this repression is mutually repressed, so that the stay 2, the headrest support 1 and the bracket 5 are complemented with each other (the repression of the bracket 5 against the mountain portion 12b reaches the bending portion 12a). In this structure, the bending pressure of the bending portion 12a is used to suppress the stay 2).

  And although not demonstrated, the other structure of the headrest support 1 is based on the structure of the said literature (1) and literature (2).

  The elastic strip 600 and / or the annular elastic body 601 may have a structure such as a spring member, a spring steel plate, other resin, rubber or the like.

  25-1 and 25-2 show a configuration in which the elastic means 602 is provided on the inner peripheral surface 100b3 of the upper opening 100b, and FIG. 25-1 shows the structure of a single or n-shaped bulge strip 602a. Moreover, FIG. 25-2 is a structure which consists of the spherical body 602c provided with the spring 602b. Further, the spring 602b and the spherical body 602c are structured not to be detached from the through hole. In this example, FIG. 25-1 is a bulging band piece 602a, and FIG. 25-2 is a structure that elastically holds the stay 2 with a spring 602b and a spherical body 602c to prevent backlash. . This concept is the same in FIGS. 26-1 to 26-3. In this example, the head 100a has a solid structure. 20-22 in the figure has shown the core metal mold | die. The molds 20 to 22 are used when the bulging strip 602a is molded. FIG. 26-4 shows an example of the mold 23.

  FIGS. 27-1 to 27-4 show the backrest prevention between the headrest support 1 and the bracket 5 provided on the frame C1, and one to n pieces of cutout pieces are provided at the connecting portion between the head 100 and the neck 101. The notch piece 10 has a deep-drawing structure and improves the elastic modulus (flexibility), thereby eliminating rattling noise. In the figure, reference numeral 25 denotes a space formed by deep drawing. Reference numeral 26 denotes a hole formed in the connecting portion 27 of the notch piece 10, and one to n holes 26 are formed in the connecting portion 27. By forming the hole 26, it is desirable that the elastic modulus of the notched piece 10 can be further improved. The hole 26 can be provided on either one side or both sides of the notch piece 10. The hole 26 is formed in an inclined direction so that the mold can be easily removed. FIG. 27A shows the cutout piece 10 on one side, and the other three places show normal cutout pieces 10a. Moreover, FIG. 27-2 provides the notch piece 10 in both, and the other two places show the normal notch piece 10a. The combination of the notch piece 10 and the notch piece 10a and / or the hole 22 is free.

  In the figure, 28 indicates an operation button, and 29 indicates a spring for returning the operation button 28.

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 sectional view of the main part (excluding the bracket) of the headrest device of the first embodiment. FIG. 4 is an enlarged plan view of the head of the first embodiment. FIG. 5-1 is an enlarged sectional view of the head of the first embodiment. FIG. 5-2 is an enlarged sectional view showing the relationship between the head and the stay in the first embodiment. FIG. 6A is an enlarged sectional view of another head of the first embodiment. FIG. 6-2 is an enlarged sectional view showing the relationship between the other head and the stay of the first embodiment. FIG. 7 is a sectional view of the main part (excluding the bracket) of the headrest device of the second embodiment. FIG. 8-1 is an enlarged sectional view of the head of the second embodiment. FIG. 8-2 is an enlarged cross-sectional view showing the relationship between the head and the stay in the second embodiment. FIG. 9-1 is an enlarged sectional view of another head of the second embodiment. FIG. 9-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the second embodiment. FIG. 10 is a cross-sectional view of the main part (excluding the bracket) of the headrest device of the third embodiment. FIG. 11-1 is an enlarged sectional view of the head of the third embodiment. FIG. 11-2 is an enlarged sectional view showing the relationship between the head and the stay in the third embodiment. FIG. 12-1 is an enlarged sectional view of another head of the third embodiment. FIG. 12-2 is an enlarged cross-sectional view showing the relationship between the other head and the stay of the third embodiment. FIG. 13 is an enlarged plan view of the head of the fourth embodiment. FIG. 14-1 is an enlarged sectional view of the head of the fourth embodiment. FIG. 14-2 is an enlarged sectional view showing the relationship between the head and the stay in the fourth embodiment. 14-3 is an enlarged cross-sectional view of the head of another fourth embodiment of FIG. 14-1. FIG. 15-1 is an enlarged sectional view of another head of the fourth embodiment. FIG. 15-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the fourth embodiment. FIG. 16-1 is an enlarged sectional view of the head of the fifth embodiment. FIG. 16-2 is an enlarged sectional view showing the relationship between the head and the stay in the fifth embodiment. FIG. 17-1 is an enlarged sectional view of another head of the fifth embodiment. FIG. 17-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the fifth embodiment. FIG. 18-1 is an enlarged sectional view of the head of the sixth embodiment. 18-2 is an enlarged cross-sectional view showing the relationship between the head and the stay in the sixth embodiment. FIG. 19-1 is an enlarged sectional view of another head of the sixth embodiment. FIG. 19-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the sixth embodiment. FIG. 20 is an enlarged plan view of the head of the seventh embodiment. FIG. 21-1 is an enlarged sectional view of the head of the seventh embodiment. FIG. 21-2 is an enlarged sectional view showing the relationship between the head and the stay in the seventh embodiment. FIG. 22-1 is an enlarged sectional view of another head of the seventh embodiment. FIG. 22-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the seventh embodiment. FIG. 23-1 is an enlarged sectional view of the head of the eighth embodiment. FIG. 23-2 is an enlarged sectional view showing the relationship between the head and the stay in the eighth embodiment. FIG. 24-1 is an enlarged sectional view of another head of the eighth embodiment. FIG. 24-2 is an enlarged cross-sectional view showing the relationship between another head and stay in the eighth embodiment. FIG. 25-1 is an enlarged cross-sectional view of the structure of one or n swelled strips of the ninth embodiment. FIG. 25-2 is another configuration of the ninth embodiment, and is an enlarged sectional view of a structure including a spring and a sphere. FIG. 26-1 is an enlarged cross-sectional view of the structure of one or n swelled strips of the tenth embodiment. 26-2 is an enlarged cross-sectional view showing a mold for molding FIG. 26-1. FIG. 26-3 is another configuration of the tenth embodiment, and is an enlarged cross-sectional view of a structure including a spring and a sphere. 26-4 is an enlarged sectional view showing another mold for molding FIG. 26-1. FIG. 27-1 is a cross-sectional view showing a notch piece on one side and the other three places in a plan view of a normal notch piece. FIG. 27-2 is a cross-sectional view in which cutout pieces are provided on both sides, and the other two portions are shown in plan view of a normal cutout piece. FIG. 27-3 is a cross-sectional view showing a state in which a hole is formed in one connecting portion of the notch piece and this state is seen in plan view. FIG. 27-4 is a cross-sectional view showing a state in which a hole is formed in two connecting portions of a notch piece and this state is seen in plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Headrest support 100 Head part 100a Tube part 100a1 Lower surface 100b Upper opening 100b1 Stepped part 100b2 Mounting groove 100b3 Inner peripheral surface 101 Neck part 102 Body part 2 Stay 3 Through-hole 5 Bracket 5a Upper surface 6 Elastic body 600 Elastic band piece 600a Swelling part Curved 601 Annular elastic body 602 Elastic means 602a Swelling strip 602b Spring 602c Sphere 8 Buffer material 10 Notched piece 10a Notched piece 11 Notched portion 12 Elastic strip 12a Curved portion 12b Mountain portion 20 Mold 21 Mold 22 Mold Mold 23 Mold 25 Space 26 Hole 27 Connecting part 28 Operation button 29 Spring C Seat back C1 Frame

Claims (9)

A headrest support that is formed so as to be supported by a receiving member disposed in the seat by inserting and holding a headrest disposed above the seat,
The headrest support is composed of a head, a neck portion having a smaller diameter than the head portion provided below the head portion, and a trunk portion having a step diameter smaller than the neck portion provided below the neck portion. And
A backlash prevention mechanism comprising a notch piece for bracket pressing formed on the neck part, and an elastic band piece for stay pressing provided in pairs in the longitudinal direction of the body part,
A through hole for inserting a stay penetrating downward from above the headrest support;
An elastic body for stay pressing provided around the through hole;
Headrest support with anti-rattle mechanism composed of The headrest support according to claim 1,
The stay pressing elastic body provided in the periphery of the through hole is an annular elastic body having a stepped portion in the upper opening of the through hole of the headrest support and having an elastic bulging portion provided in the stepped portion. Headrest support with a built-in rattle prevention mechanism. The headrest support according to claim 1,
The stay pressing elastic body provided in the periphery of the through hole includes a backlash prevention mechanism in which one or a plurality of elastic strips standing in an integrated shape are provided above the through hole of the headrest support. Headrest support. The headrest support according to claim 3,
A headrest support provided with a backlash prevention mechanism configured to be filled with a cushioning material having an elastic characteristic between the elastic strip and the upper opening. The headrest support according to claim 3,
The elastic strip provided in the upper opening of the through hole of the headrest support has a backlash prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Headrest support. The headrest support according to claim 1,
The elastic body for pressing the stay provided around the through hole is a headrest support provided with a backlash prevention mechanism in which an annular elastic body provided with an elastic band piece is fitted to the upper opening of the through hole of the headrest support. . The headrest support according to claim 6,
A headrest support including a backlash prevention mechanism configured to fill a cushioning material having an elastic characteristic between the annular elastic body and an upper opening. The headrest support according to claim 6,
The ring-shaped elastic body fitted into the upper opening of the through hole of the headrest support has a rattling prevention mechanism in which the substantially central portion is curved toward the center of the through hole with respect to the longitudinal direction of the headrest support. Headrest support provided. The headrest support according to claim 6,
A headrest support provided with a backlash prevention mechanism in which a fitting groove is formed in the bottom of the annular elastic body and the upper opening, and the lower end of the annular elastic body is locked in the fitting groove.

Images