JPH0642515Y2 - Headrest adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a headrest adjusting device, and more particularly to a device for adjusting the height of a headrest body.

[Conventional technology]

A conventional headrest adjusting device is, for example, 1-30119
As described in Japanese Patent Publication No. JP-A-2003-264, a headrest stay protruding from the lower surface of the headrest body is inserted into a hole of a support member provided at the top of the seat back, and a locking spring provided on the support member is engraved on the headrest stay. By engaging with the groove, the vertical position can be adjusted.

However, in this case, when adjusting the height of the headrest body, it is necessary to push down or push up the headrest body with the other hand while operating the knob of the locking spring with one hand. The operation is troublesome.

In order to solve such a problem, as in Japanese Utility Model Laid-Open No. 59-148651, a guide member that is vertically movable is provided inside the headrest body, and the upper end portion of the headrest stay is fixed to this guide member, It has been proposed that a spring for urging the guide member downward (headrest main body upward) is installed in the headrest main body. A stay locking device is provided on the stay protruding portion of the headrest main body, and the locking device engages with a groove provided on the stay.

[Problems to be solved by the device]

In the case of the above adjusting device, when the headrest main body is raised, the headrest main body is pushed up by the spring, so it is not necessary to push it up by hand, but when lowering the headrest main body, as in the conventional case, the stay lock device is pushed with one hand. It is necessary to push down the headrest body while releasing, and the operability is not improved so much.

Therefore, an object of the present invention is to provide a headrest adjusting device that can be easily operated with one hand when raising and lowering the headrest body.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is a headrest adjusting device comprising a headrest stay projecting from a lower surface of a headrest body, which is mounted in a hole provided in a top portion of a seat back, and is fixed to an upper end portion of the headrest stay.
A movable plate that is vertically movable inside the headrest body, a plurality of lock holes provided in the movable plate in the vertical direction, and a movable plate that is provided inside the headrest body and urges the movable plate downward with respect to the headrest body. The return spring, the lock spring whose one end is supported inside the headrest body, and the lock spring biasing force selectively engages with the lock hole to move the movable plate in the return spring biasing direction. It is provided with a hook for restricting and a lock release lever with a knob that can be operated from the outside in a direction in which the hook is disengaged from the lock hole.

[Action]

That is, when the knob is operated in the unlocking direction, the hook is disengaged from the lock hole of the movable plate via the unlocking lever. Then, the movable plate is pushed downward by the spring force of the return spring, but since the movable plate is fixed to the top of the seat back via the headrest stay, the headrest body moves upward. As soon as the headrest body starts moving and the hand is released from the knob, the hook engages with the next lock hole, so that the headrest body is raised by one step.

Further, when lowering the headrest main body, if the headrest main body is pushed down with a certain amount of force, the hook automatically disengages from the lock hole and engages with the next lock hole.

〔Example〕

1 to 4 show an example of a headrest adjusting device according to the present invention.

In the figure, 1 is a seat back, and seat back 1
Two cylindrical support members 2 are fixed to the top of the, and the two headrest stays 4, 4 projecting from the lower surface of the headrest body 3 are inserted deeply into these support members 2 so that they cannot move. It is supported.

Inside the headrest body 3, a case 5 and a cover 6 that closes the lower surface opening of the case 5 are fixed.
A movable plate 7 is housed inside the case 5 so as to be vertically movable. Cylindrical guide parts 7a, 7b slidable up and down within the guide surfaces 5a, 5b of the case 5 are integrally provided on both left and right sides of the movable plate 7, and these guide parts 7a, 7b are provided.
The upper end of the headrest stay 4 is fitted and fixed in the interior of the. Return springs 8 are provided between the upper surfaces of the guide portions 7a and 7b and the ceiling surface of the case 5, and the movable plate 7 is constantly urged downward. A notch 7c is formed in the central portion of the movable plate 7, and two rows of lock holes 7d and 7e are vertically provided on both sides of the notch 7c. The left and right lock holes 7d and 7e are displaced from each other by a half pitch.

Inside the case 5, a frame 9 made of a frame-shaped metal plate is housed and fixed in parallel to the front side of the movable plate 7. Locking springs 10 and 11 composed of two leaf springs are fixed to the upper side surface of the frame 9 by rivets 12. The springs 10 and 11 have a biasing force toward the rear side, that is, the movable plate 7 side. ing. Lock spring
Hooks 13 and 14 that selectively engage with the lock holes 7d and 7e are fixed to the lower ends of the hooks 10 and 11, and both hooks 13 and 14 are connected to each other by a connecting pin 15. Hooks 13,14
Since both of them are provided at the same height, only one of the left and right hooks engages with the lock holes 7d and 7e, so that a total of eight height adjustments are possible.

An upper end of a lock release lever 16 is fixed to the center of the connecting pin 15. A central portion of the lock release lever 16 is swingably supported in the front-rear direction by a support shaft 17 provided at the center of the lower end portion of the frame 9, and a knob 18 is fixed to the lower end portion of the lever 16. The knob 18 projects from the lower surface of the headrest body 3.

Here, the operation of the headrest adjusting device having the above structure will be described.

In the locked state, the hooks 13 and 14 are engaged with one of the lock holes 7d and 7e (the lock hole 7e on the right side in FIG. 1 in the figure) by the urging force of the locking springs 10 and 11, so that the headrest body 3 Is locked vertically.

Now, when the knob 18 is pushed rearward (in the direction of the arrow in FIG. 3), the lock release lever 16 swings about the support shaft 17 as a fulcrum, and the lever 15
The hooks 13 and 14 connected to the upper end of the lock via connecting pins 15 are pushed forward against the lock springs 10 and 11 and come out of the lock holes 7d and 7e (shown by the chain double-dashed line in FIG. 3). Therefore, the headrest body 3 is moved upward as a whole by the action of the return spring 8. At this time, if the timing of releasing the knob 18 is early, one of the hooks 13 and 14 engages with the lock hole one step lower, and is locked again. for that reason,
The headrest body 3 is in a state of being lowered by one step.

Further, when lowering the headrest body 3, it is sufficient to simply push down the headrest 3. Then, a downward pushing force acts on the hooks 13 and 14 attached to the headrest body 3 via the locking springs 10 and 11, so that the hooks 13 and 14 disengage from the lock holes 7d and 7e located at a certain position, and the lock is lowered one step. Reengage the holes. As a result, the headrest body 3 is lowered by one step.

The present invention is not limited to the above embodiment. For example, one plate-shaped stay may be used instead of the two round bar-shaped stays.

Further, the knob of the lock release lever is not limited to the one protruding on the lower surface of the headrest body, but may be projected or exposed on the rear surface or the top surface. Correspondingly, a coil spring may be used instead of the leaf spring as the locking spring. However, if the knob is made to project to the lower surface side of the headrest body, the risk of accidental operation by mischief is the least.

Further, although the two rows of lock holes and the two hooks are provided in the above embodiment, the one row of lock holes and the one hook may be replaced. However, in the case of the embodiment, there is an advantage that multi-step adjustment can be performed by half pitch.

[Effect of device]

As is apparent from the above description, according to the present invention, when the headrest body is raised, only the knob needs to be operated in the unlocking direction, and when it is lowered, the headrest body is pushed down. Any lower height adjustment can be made. Therefore, it is possible to realize a headrest adjusting device having extremely excellent operability.

[Brief description of drawings]

FIG. 1 is a front view of an example of a headrest adjusting device according to the present invention seen from the rear, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. , Fig. 4 shows the first
FIG. 4 is a sectional view taken along the line IV-IV in the figure. 1 …… Seat back, 3 …… Headrest body, 4 ……
Headrest stay, 5 ... Case, 7 ... Movable plate, 7d, 7e ... Lock hole, 8 ... Return spring,
9 …… Frame, 10,11 …… Lock spring, 13,14
…… Hook, 16 …… Lock release lever, 18 …… Knob.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mitsuru Okamoto, 2-4-6 East, Toyonan-cho, Toyonaka-shi, Osaka Prefecture Fuji Seat Co., Ltd. (72) Takahiro Kimura 2--4-6 East, Toyonan-cho, Toyonaka, Osaka No. Fuji Sheet Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A headrest adjusting device comprising a headrest stay projecting from a lower surface of a headrest body mounted in a hole provided at a top portion of a seatback, wherein the headrest stay is fixed to an upper end portion of the headrest body, and the inside of the headrest body is vertically moved. A movable plate movable in any direction, a plurality of lock holes provided in the movable plate in the vertical direction, a return spring that is provided inside the headrest body and urges the movable plate downward with respect to the headrest body, and a headrest A lock spring whose one end is supported inside the main body; a hook that selectively engages with the lock hole by the urging force of the lock spring to restrict the movement of the movable plate in the urging direction of the return spring; Lock release with knob that can be operated from the outside in the direction to disengage the lock hole Headrest adjusting device, characterized by comprising a bar, a.