JP5353549B2 - Headrest device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest device for controlling the changeover speed of a headrest without deteriorating outer appearance. <P>SOLUTION: Slits 42 are formed in the cover members 40 of the headrest device 4, so as not to block turning of stays 22. Plate-like resilient members 60 covering the openings of the slits 42 are assembled to make a pair on the inner surfaces of both edges in the longitudinal direction of the slits 42. The plate-like resilient members 60 are formed to make first openings 48 and second openings 50 remain in the slits 42. Notches 64 for guiding the stays 22 in a state of changing-over the headrest 20 into a storage state to a part between facing edges 60a in the paired plate-like resilient members 60 are formed at the first opening side ends of the facing edges 60a in the plate-like resilient members 60. The first openings 48 are formed so that the stays 22 in a substantially raised state can make a stroke until the stay reaches the notches when the headrest 20 is changed-over into the storage state. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a headrest device, and more particularly to a headrest device capable of switching a headrest from a usable state to a retracted state.

  2. Description of the Related Art Conventionally, a headrest device that can switch a headrest from a usable state to a retracted state by rotating the stay from a substantially upright state to a forwardly tilted state with respect to the seatback by a rotation mechanism assembled on the seatback side is already known. It has been. Here, in Patent Document 1 below, in order to prevent the opening of the slit formed in the cover member covering the surface of the rotation mechanism from being exposed, a plate-like elastic member ( A headrest device in which a tongue member is assembled is disclosed. Thereby, since the opening of a slit is blocked | closed, the appearance of a headrest apparatus can be improved.

JP 2008-279109 A

  However, in the above-described prior art, since the plate-like elastic member closes substantially all of the slit openings, when the headrest is switched from the usable state to the retracted state, the stay receives a large resistance force from the plate-like elastic member. As a result, it is difficult to control the switching speed of the headrest.

  An object of the present invention is to provide a headrest device that can control the switching speed of the headrest without deteriorating the appearance.

The present invention is for achieving the above object, and is configured as follows.
According to the first aspect of the present invention, a headrest having a stay and a seat back side are assembled, and the headrest is changed from a usable state to a retracted state by rotating the stay from a substantially standing state to a forwardly tilted state with respect to the seat back. The cover member is composed of a switchable rotation mechanism and a cover member for covering the rotation mechanism. The cover member is formed with a slit so as not to block the rotation of the stay. A pair of plate-like elastic members for covering the opening of the slit is assembled to each edge so that when the headrest is switched from the usable state to the retracted state, the stays are opposed to each other in the plate-like elastic member that forms a pair. The plate-like elastic member is an inner surface side of both edges in the longitudinal direction of the slit. The headrest is assembled so as to form a pair, and in this assembled state, the first opening is left in the slit so that the stay of the headrest in the usable state does not interfere with itself, and the headrest in the retracted state The second opening is left in the slit so that the stay does not interfere with itself. Of the edges of the plate-like elastic members, the first of the opposite edges of the pair of plate-like elastic members A notch that guides the stay when the headrest is switched from the usable state to the retracted state between the opposing edges of the pair of plate-like elastic members is formed at the end on the opening side. When the headrest is switched from the usable state to the retracted state, the opening is formed so as to be able to stroke until the stay in the substantially standing state reaches the notch. A construction which is characterized in that there.
According to this configuration, since the opening of the slit can be covered by the plate-like elastic member, it is possible to prevent the appearance of the headrest device from deteriorating. Further, according to this configuration, when the headrest is switched from the usable state to the retracted state, first, the headrest can be tilted forward vigorously in the first opening, and then the stay of the headrest is moved to the plate-like elastic member. When the notch is reached, the headrest can be tilted forward while relaxing the momentum in the subsequent rotation. Therefore, the switching speed of the headrest can be controlled.

FIG. 1 is an exploded perspective view of a headrest device according to an embodiment of the present invention. FIG. 2 is a perspective view of the assembled state of FIG. FIG. 3 is a front view of the main part in the state of FIG.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. 1-3. In the following description, the terms “up”, “down”, “front”, “back”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “rear”, “left”, and “right” described in the above-described drawings. The direction of up, down, front, back, left and right is shown.

  First, a schematic configuration of the headrest device 4 according to the embodiment of the present invention will be described with reference to FIGS. The headrest device 4 mainly includes a headrest 20, a rotation mechanism 30, and a cover member 40. Below, these structural members 20, 30, and 40 are demonstrated separately.

  First, the headrest 20 will be described. The headrest 20 is assembled to the upper part of the seat back 3 via a pair of left and right stays 22 for receiving the rear head of an occupant seated on the vehicle seat 1 including a seat cushion (not shown) and the seat back 3. It is a member having cushioning properties. Both the stays 22 are members for assembling the headrest 20 as described above, and are configured integrally with the headrest 20 by, for example, a metal pipe.

  Next, the rotation mechanism 30 will be described. The rotation mechanism 30 is a mechanical member that can rotate both the stays 22 described above with respect to the seat back 3 from a substantially upright state to a forwardly inclined state. Therefore, the lower end side of both stays 22 is assembled to the rotation mechanism 30 so as to be rotatable about an axis whose axial direction is the width direction of the seat back 3.

  Thereby, it is possible to switch from the usable state in which the rear head of the occupant (hereinafter, simply referred to as “occupant”) seated on the vehicle seat 1 to the headrest 20 can be received to the retracted state in which the headrest 20 is moved forward. Of course, the reverse switching (switching from the stored state to the usable state) can also be performed. In addition, the rotation mechanism 30 includes a lock mechanism (not shown) that prevents the stay 22 from rotating when the headrest 20 is in the usable state and the retracted state. In addition, since this rotation mechanism 30 is a well-known structure, the detailed description shall be abbreviate | omitted.

  Finally, the cover member 40 will be described. The cover member 40 is a member for covering the surface of the rotation mechanism 30 described above, and is, for example, a member integrally formed of a synthetic resin having rigidity. Even when the occupant is seated back on the seat back 3, the rotation mechanism 30 can be protected by the cover member 40. In the cover member 40, two slits 42 and 42 are formed in a substantially inverted L-shape in vertical section so as not to block the rotation of both the stays 22 described above.

  Plate-like elastic members 60 and 60 are assembled in pairs on the inner surface side of both edges in the longitudinal direction (the vertical direction in FIG. 1) of both slits 42. Thereby, it can prevent that the appearance of the headrest apparatus 4 deteriorates. The plate-like elastic member 60 is a member for covering the opening of the slit 42, and is, for example, a member integrally formed with a synthetic resin having flexibility.

  Further, the plate-like elastic member 60 has the headrest 20 in the retracted state so that the stay 22 does not interfere with itself (the plate-like elastic member 60) when the headrest 20 is in a usable state. At this time, the stay 22 is formed so as not to interfere with itself (the plate-like elastic member 60).

  That is, in the plate-like elastic member 60, even if the opening of the slit 42 is covered by itself (the plate-like elastic member 60), the first opening 48 is left in the slit 42 when the headrest 20 is in a usable state. As described above, the second opening 50 is formed in the slit 42 when the headrest 20 is in the retracted state.

  Further, among the edges of the plate-like elastic member 60, the headrest 20 is switched from the usable state to the retracted state at the end portion on the first opening 48 side of the facing edge 60a of the paired plate-like elastic members 60. A notch 64 is formed for guiding the stay 22 between the opposing elastic edges 60a, 60a between the opposing edges 60a, 60a.

  The first opening 48 is formed to have a sufficient distance until the stay 22 in the substantially standing state reaches the notch 64 when the headrest 20 is switched from the usable state to the retracted state. This description corresponds to “it is formed to be strokeable” described in the claims.

  The plate-like elastic member 60 is assembled by, for example, heat caulking. Specifically, the two protrusions 46, 46 integrally projecting from the inner surface side of both edges of the slit 42 are fitted into the locking holes 62, 62 formed in the plate-like elastic member 60, and the fitting is performed. In this state, the protrusions 46 and 46 are welded to the locking holes 62 and 62 by heat. Thereby, the plate-like elastic member 60 can be easily assembled. Further, the cover member 40 is assembled to the upper frame 10a of the back frame 10 of the seat back 3 by means of bolts B. The headrest device 4 is configured in this way.

  Then, with reference to FIGS. 2-3, the effect | action of the headrest apparatus 4 which consists of the structure mentioned above is demonstrated. First, a description will be given from the time when the headrest 20 is in a usable state (a state where the headrest 20 is shown by a solid line in FIG. 2 and a state where the stay 22 is shown by a solid line in FIG. 3).

  From this state, the occupant unlocks the locking mechanism and rotates the stay 22 forward so that the headrest 20 falls forward. Then, when the stay 22 reaches the notches 64 and 64 of the plate-like elastic members 60 and 60 that form a pair (in FIG. 2, when the headrest 20 is switched to the state indicated by the imaginary line (1), When the stay 22 is switched to the state indicated by the imaginary line (1)), in the subsequent rotation, the stay 22 starts to bend the opposing edges 60a and 60a of the paired plate-like elastic members 60 and 60, respectively.

  Further, when the stay 22 is rotated forward, the stay 22 reaches the second opening 50 and the rotation of the stay 22 is finished. In this way, the headrest 20 can be switched to the retracted state (in FIG. 2, the headrest 20 can be switched to the state indicated by the imaginary line (2). In FIG. 3, the stay 22 is the imaginary line (2). Can be switched to the state indicated by). In addition, what is necessary is just to perform operation reverse to said description for operation which returns the headrest 20 to a usable state from a retracted state.

  The headrest device 4 according to the embodiment of the present invention is configured as described above. According to this configuration, when the headrest 20 is switched from the usable state to the retracted state, the stay 22 first rotates inside the first opening 48 of the slit 42. Since the first opening is formed to have a sufficient distance until the stay 22 in the standing state reaches the notch 64, the headrest 20 can be tilted forward (see FIG. 2). From the state indicated by the solid line 20 to the state indicated by the imaginary line (1), in FIG. 3, the headrest 20 leans forward vigorously from the state indicated by the solid line to the state indicated by the imaginary line (1) in FIG. Can be made).

  When the stay 22 reaches the notches 64 of the plate-like elastic members 60, 60 that form a pair, the stay 22 turns the opposing edges 60a, 60a of the plate-like elastic members 60, 60 that form a pair in the subsequent rotation. Since the headrest 20 is rotated while receiving contact resistance, the forward tilting momentum of the headrest 20 is relaxed (in FIG. 2, the state of the headrest 20 indicated by the imaginary line (2) from the state indicated by the imaginary line (1)) Until now, in FIG. 3, the momentum of the headrest 20 is lowered from the state indicated by the imaginary line (1) to the state indicated by the imaginary line (2).

  When the stay 22 reaches the notches 64 of the pair of plate-like elastic members 60, 60, the notches 64 enter between the opposing edges 60a, 60a of the plate-like elastic members 60, 60 that form a pair with the stay 22. Therefore, it is possible to prevent the stay 22 from being caught by the pair of plate-like elastic members 60, 60. Therefore, the headrest 20 can be smoothly switched to the retracted state.

  Further, when the stay 22 reaches the second opening 50, the contact resistance from the opposing edges 60a, 60a of the paired plate-like elastic members 60, 60 is eliminated, so that the headrest 20 is retracted without loosening too much force. You can switch to the state. Thus, when the headrest 20 is switched from the usable state to the retracted state, the speed of the switching can be controlled (as described above, first, the headrest 20 is tilted forward vigorously and then the momentum is not excessively loosened).

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, thermal caulking has been described as an example. However, it is not limited to this, For example, you may join with a clip etc.

3 Seat Back 4 Headrest Device 20 Headrest 22 Stay 30 Rotating Mechanism 40 Cover Member 42 Slit 48 First Opening 50 Second Opening 60 Plate-like Elastic Member 60a Opposite Edge 64 Notch

Claims (1)

A headrest having a stay, a rotation mechanism that is assembled on the seat back side, and that allows the headrest to be switched from a usable state to a retracted state by rotating the stay from a substantially upright state to a forwardly inclined state with respect to the seat back; The cover member is configured to cover the moving mechanism, and the cover member is formed with slits so as not to block the rotation of the stay, and both edges in the longitudinal direction of the slit cover the openings of the slits. The plate-like elastic members are assembled so as to form a pair, and when the headrest is switched from the usable state to the retracted state, the stays rotate while bending the opposing edges of the paired plate-like elastic members, respectively. A device,
The plate-like elastic member is assembled so as to form a pair on the inner surface side of both edges in the longitudinal direction of the slit, and in this assembled state, the headrest stay in the usable state does not interfere with itself. The second opening is formed in the slit so that the first opening remains, and the stay of the headrest in the retracted state does not interfere with itself.
A pair of stays when the headrest is switched from the usable state to the retracted state are paired at the end portion of the edge of the plate-like elastic member on the first opening side of the opposite edge of the plate-like elastic member forming a pair. A notch is formed to guide between facing edges of the plate-like elastic member formed,
The first opening is configured to be capable of stroke until the stay in a substantially standing state reaches the notch when the headrest is switched from the usable state to the retracted state.

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