JP2010149695A - Thinning structure for vehicular headrest panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thinning structure for a vehicular headrest panel capable of prevent the deflection of an arm caused by an impact during the support of the rear head of an occupant even if thinning is applied to prevent the expansion caused by cooling solidification during molding with a hard resin material. <P>SOLUTION: The thinning structure is provided for the vehicular headrest panel 24 which is formed of the hard resin material to support the rear head of the occupant. The vehicular headrest panel 24 has a main arm 24a formed integrally with its back face. Thinning 24b is applied to the main arm 24a so as to communicate with the front face of the vehicular headrest panel 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lightening structure for a vehicle headrest panel, and more particularly to a lightening structure for a vehicle headrest panel made of a hard resin material and capable of receiving the back of a passenger.

  As this type of vehicle headless structure, for example, the technique disclosed in FIG. 7 is already known. In this technique, a vehicle headrest (hereinafter, “vehicle” is omitted and is simply referred to as “headrest”. The same applies to a “headrest panel” described later.) 103 forms a base thereof. The base member 120, a pair of left and right stays 122, 122 assembled so as to be integrated with the base member 120, and the rear head of the occupant who covers the front surface of the base member 120 and sits on a seat cushion (not shown) A substantially cover-like headrest panel 124, a back cover 126 for covering the back side of the headrest panel 124 in a manner to accommodate the base member 120, and a headrest formed by assembling the headrest panel 124 and the back cover 126. Pad member that can be assembled to the case 28 (not shown in FIG. 7), (7, not shown) the cover member 128a for covering the surface of the pad member 128 is constructed from a.

  Of these components, the headrest panel 124 will be described in detail. The headrest panel 124 is formed with a pair of left and right lower arms 124a and 124a and upper arms 125a and 125a so as to be integrated with the back side thereof. When a rear collision occurs in the vehicle, the link mechanism L assembled between the arms 124a and 125a and the base member 120 is operated, so that the headrest panel 124 protrudes from the base member 120. (See FIGS. 8 and 9). Thereby, since the headrest 103 itself jumps out of the stay 122, even when a rear collision occurs in the vehicle, it is possible to receive and protect the occupant's rear head. The headrest panel 124 is formed by integral molding with a hard resin material together with the lower arm 124a and the upper arm 125a.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
US Pat. No. 6,082,817

  However, in the above-described technique, the lower arms 124a are each provided with the lightening 124b in the width direction of the lower arms 124a in order to prevent the expansion and contraction caused by cooling and solidification during molding (see FIG. 10). Therefore, when the headrest 103 receives the rear head of the occupant, the lower arm 124a may be bent away from each other due to the received impact.

  The present invention is intended to solve such a problem, and the purpose of the present invention is to reduce the expansion and contraction caused by cooling and solidification at the time of molding with a hard resin material. It is an object of the present invention to provide a vehicle headrest panel thinning structure that can prevent bending of an arm due to an impact received by a rear head.

The present invention is for achieving the above object, and is configured as follows. The invention according to claim 1 is a thinning structure of a vehicle headrest panel made of a hard resin material and capable of receiving the back of the occupant. A main arm is formed so as to be integrated, and the main arm is thinned so as to communicate with the front side of the vehicle headrest panel.
According to this configuration, since the opening side is the front side of the vehicle headrest panel, the main arm (for example, the lower arm) is also disposed in the width direction (left-right direction) and the vertical direction of the vehicle headrest panel. It can be in a closed state. Therefore, the strength of the main arm can be improved as compared with the lower arm of the prior art (corresponding to the main arm of the present invention). Therefore, even when the vehicle headrest receives the occupant's rear head, the main arm does not bend due to the received impact.

Further, the invention according to claim 2 is the thinning structure of the vehicle headrest panel according to claim 1, characterized in that ribs are formed at portions where the thinning is performed. To do.
According to this configuration, the strength of the main arm can be ensured even if the meat is cut out.

According to a third aspect of the present invention, in the vehicle headrest panel thinning structure according to the second aspect, the rib is formed from the front side of the headrest panel toward the depth direction. And
According to this configuration, it is possible to match the direction in which the thickness is removed, the direction in which the ribs are formed, and the mold opening direction of the molding die when the headrest panel is molded (for example, integrally molded). Therefore, the headrest panel can be easily manufactured even if the meat is cut out or the ribs are formed.

According to a fourth aspect of the present invention, there is provided a vehicle headrest panel thinning structure according to any one of the first to third aspects, wherein the vehicle headrest panel is integrated with the back side thereof. The slave arm is also formed, and the slave arm is formed at a position shifted in the width direction with respect to the main arm.
According to this configuration, the main arm does not interfere with the slave arm in the vertical direction. Therefore, the base end side of the main arm can be largely secured in the vertical direction, and as a result, the strength of the main arm can be improved.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing an internal structure of a headrest according to an embodiment of the present invention. FIG. 2 is an enlarged view of the headrest panel of FIG. FIG. 3 is a perspective view of the headrest panel of FIG. 2 as viewed from the rear. 4 is a cross-sectional view taken along line AA in FIG. 5 is a cross-sectional view taken along line BB in FIG. 6 is a cross-sectional view taken along the line CC of FIG.

  In FIG. 1 described above, in order to easily show the internal structure of the headrest 3, the cushion structure and the skin structure are omitted, and only the internal frame structure is shown. In the following description, “up”, “down”, “front”, “rear”, “left”, “right” refers to the directions of “up”, “down”, “front”, “rear”, “left”, “right” described in the above-described drawings When up, down, front, back, left, right are shown.

  First, the structure of the headrest 3 according to the embodiment of the present invention will be described with reference to FIG. Similarly to the headrest 103 described in the prior art, the headrest 3 includes a base member 20 that forms a base thereof, a pair of left and right stays 22 and 22 that are assembled to be integrated with the base member 20, and the base member 20. A substantially cover-like headrest panel 24 that covers the front face of the vehicle and can receive the back of the occupant seated on a seat cushion (not shown), and covers the back side of the headrest panel 24 so as to accommodate the base member 20. A back cover 26, a pad member (not shown) that is assembled in a headrest case formed by assembling the headrest panel 24 and the back cover 26, and a cover member that covers the surface of the pad member 28 (not shown) (Not shown).

  Of the constituent members of the headrest 3, the pair of left and right stays 22 and 22 will be described in detail. The pair of left and right stays 22 and 22 are each configured in a cylindrical shape. The headrest 3 can be assembled to the seat back by inserting both the stays 22 into a pair of left and right supports (both not shown) assembled to the seat back. Further, among these stays 22, for example, a rod 36 is inserted into the right stay 22.

  At this time, the rod 36 is inserted into the right stay 22 with its upper end hooked on the release member K of the lock mechanism R. When a rear collision occurs in the vehicle, a rear collision detection means (for example, a well-known dorsal load detection mechanism provided inside the seat back) is activated, and the rod 36 is pushed up and the release member K is activated along with this operation. As a result, the lock mechanism R is unlocked.

  The headrest panel 24 among the constituent members of the headrest 3 will be described in detail. The headrest panel 24 is assembled to the base member 20 by a link mechanism (for example, a three-point link mechanism) via a thick plate-shaped link plate 30. It has been. The three-point link mechanism will be described in more detail. Both ends in the width direction on one end side (rear end side) of the link plate 30 are pivotally attached to the left and right sides above the base member 20 via pins P1, respectively.

  Similarly, both ends in the width direction on the other end side (front end side) of the link plate 30 are integrated with the back side of the headrest panel 24 via a pair of left and right round shafts P2 and P2 formed at both ends. The left and right upper arms 25a and 25a formed as described above are pivotally attached to each other. The upper arm 25a corresponds to a “secondary arm” described in the claims. The upper arms 25a are formed at positions shifted inward in the width direction with respect to both lower arms 24a described later.

  In addition, long holes 20a are formed on the lower left and right sides of the base member 20 in a substantially vertical direction. A connecting pin 32 is fixed to the headrest panel 24 so as to bridge a pair of left and right lower arms 24a, 24a formed integrally with the back side thereof. At this time, the connecting pin 32 is fixed so as to be movable in the long hole 20 a formed in the base member 20. In this way, the three-point link mechanism is constituted by three points including the pin P1 on one end side of the link plate 30, the round shaft P2 on the other end side, and the connecting pin 32. This three-point link mechanism corresponds to the link mechanism L described in the prior art. The lower arm 24a corresponds to a “main arm” recited in the claims.

  Further, tension springs 54 and 54 are respectively hung on the left and right sides of the connecting pin 32 between the upper side of the base member 20. As a result, the connecting pin 32 is biased toward the upper end side of the long hole 20 a of the base member 20, that is, the headrest panel 24 fixed to the connecting pin 32 is obliquely above the base member 20. It is in a state of being urged toward.

  Then, when the rear collision does not occur in the vehicle, the connection pin 32 is locked so that the headrest panel 24 is integrated with the base member 20 (the headrest panel 24 does not protrude). (The connection pin 32 is held at the lower end of the long hole 20a) (corresponding to FIG. 8 in the prior art).

  Further, as described above, when the lock mechanism R is unlocked from this locked state, the connecting pin 32 moves from the lower end of the elongated hole 20a toward the upper end by the urging force of the tension spring 54. As the three-point link mechanism is activated along with this movement, the headrest panel 24 protrudes toward the back of the occupant from the base member 20 (the connecting pin 32 has moved to the upper end of the long hole 20a). State) (corresponding to FIG. 9 in the prior art). Of course, the headrest panel 24 can be returned to the state before the jumping out from the protruding state, and the headrest panel 24 can be locked again by the lock mechanism R in the returned state.

  Further, the lower arms 24 a of the headrest panel 24 are respectively provided with a lightening 24 b so as to communicate with the front side of the headrest panel 24. A plurality of ribs 24c are formed at locations where the lightening 24b is applied. The wall surfaces of the plurality of ribs 24 c are formed from the front side of the headrest panel 24 toward the depth direction. Note that the lightening 24b and the rib 24c are integrally formed with the headrest panel 24 by a synthetic resin (hard resin material) having rigidity together with the lower arm 24a and the upper arm 25a described above. Thus, if the thickness reduction 24b is given, the thickness reduction direction and the mold opening direction (front-back direction of the headrest panel 24) of the molding die when the headrest panel 24 is integrally formed can be matched. The same applies to the direction in which the plurality of ribs 24c are formed.

  The headrest 3 according to the embodiment of the present invention is configured as described above. According to this configuration, since the lightening 24b is provided so as to communicate with the front side of the headrest panel 24, the expansion and contraction that occurs in the lower arm 24a due to cooling and solidification at the time of molding is prevented as in the description of the prior art. Can do. At this time, since the opening side of the lightening 24b is the front side of the headrest panel 24, the lower arm 24a can be closed in the width direction (left-right direction) and the vertical direction of the headrest panel 24. . Therefore, the strength of the lower arm 24a can be improved as compared with the conventional lower arm 124a. Therefore, even when the headrest 3 receives the rear head of the occupant, the lower arm 24a is not bent due to the received impact.

  Moreover, according to this structure, the some rib 24c is formed in the location where the lightening 24b is given. Therefore, the strength of the lower arm 24a can be ensured even if the lightening 24b is performed.

  Further, according to this configuration, the plurality of ribs 24 c are formed from the front side of the headrest panel 24 toward the depth direction. For this reason, it is possible to match the direction in which the lightening 24b is formed, the direction in which the plurality of ribs 24c are formed, and the mold opening direction of the molding die when the headrest panel 24 is integrally formed. Therefore, the headrest panel 24 can be easily manufactured even if the lightening 24b is applied or the rib 24c is formed.

  In addition, according to this configuration, the upper arms 25a are formed at positions shifted inward in the width direction with respect to the lower arms 24a. For this reason, the lower arms 24a do not interfere with the upper arms 25a in the vertical direction. Therefore, the base end sides of the lower arms 24a can be largely secured in the vertical direction, and as a result, the strength of the lower arms 24a can be improved.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, an example has been described in which a plurality of ribs 24 c that are one-dimensionally arranged in the vertical direction with respect to the front side of the headrest panel 24 are formed. However, the present invention is not limited to this, and a plurality of ribs 24c that are two-dimensionally arranged in the vertical direction and the width direction (left-right direction) with respect to the front side of the headrest panel 24 may be formed.

FIG. 1 is an exploded perspective view showing an internal structure of a headrest according to an embodiment of the present invention. FIG. 2 is an enlarged view of the headrest panel of FIG. FIG. 3 is a perspective view of the headrest panel of FIG. 2 as viewed from the rear. 4 is a cross-sectional view taken along line AA in FIG. 5 is a cross-sectional view taken along line BB in FIG. 6 is a cross-sectional view taken along the line CC of FIG. FIG. 7 is an exploded perspective view showing the internal structure of the headrest according to the prior art. FIG. 8 is a longitudinal sectional view schematically showing a normal state of the headrest in the assembled state of FIG. FIG. 9 is a vertical cross-sectional view schematically showing a state when the headrest is maximally popped out from the state of FIG. 8 due to the occurrence of a rear collision in the vehicle. FIG. 10 is an enlarged view of the headrest panel of FIG. 7 as viewed from the rear, and is a diagram for explaining the problems of the prior art.

Explanation of symbols

24 Headrest panel 24a Lower arm (main arm)
24b Meat extraction 24c Rib 25a Upper arm (secondary arm)

Claims (4)

It is made of a hard resin material and has a structure for removing a headrest panel for a vehicle that can receive the back of the occupant,
A main arm is formed on the vehicle headrest panel so as to be integrated with the back side thereof,
A vehicle headrest panel lightening structure, wherein the main arm is lightened so as to communicate with the front side of the vehicle headrest panel. A vehicle headrest panel thinning structure according to claim 1,
A vehicle headrest panel meat removal structure, characterized in that ribs are formed at locations where the meat removal is performed. A vehicle headrest panel thinning structure according to claim 2,
The rib structure of the headrest panel for vehicles characterized by the rib being formed toward the depth direction from the front side of the headrest panel. It is the thinning structure of the headrest panel for vehicles given in any 1 paragraph of Claims 1-3,
The vehicle headrest panel is also formed with a follower arm so as to be integrated with the back side,
A sub-arm structure for a vehicle headrest panel, wherein the sub arm is formed at a position shifted in the width direction with respect to the main arm.

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