JPH0515235Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a headrest support structure that is vertically movably supported by a headrest stay at the upper end of a seat bag.

[Conventional technology]

Generally, in the case of a vehicle seat, a headrest that supports the head of a seated person from the back side is provided at the upper end of the seat back and is movable up and down via a headrest stay. In other words, such a headrest has the left side hanging down from the main body,
The right headrest stay is supported so that it can move up and down by inserting and holding it in a resin headrest holder provided on the seatback frame at the upper end of the seatback, and it can be moved up and down while inserting and removing these stays. The structure is such that the height position in the direction can be adjusted and the holder can be locked and fixed at an appropriate position using a locking mechanism such as a locking pawl provided on one side of the holder.

[The problem that the idea attempts to solve]

By the way, according to the conventional headrest support structure described above, the headrest stay is inserted and held in the headrest holder provided on the seat back side, and the stay is locked only on one of the holder sides. The stay tends to rattle in the holder, especially on the side of the holder that is not equipped with a locking mechanism, which not only makes it impossible to maintain stable headrest support, but also causes rattling and other abnormal noises. This was unavoidable and a practical problem. Furthermore, in the conventional structure as described above, when adjusting the headrest by moving it up and down,
It is common to have a structure in which a locking pawl locks into multiple notches, etc. provided on the stay side, and the amount of adjustment is limited by the spacing between the notches, etc., so there are problems such as not being able to make fine adjustments. Therefore, it is desired that some kind of countermeasure be taken to eliminate the above-mentioned problems in consideration of such points.

[Means for Solving the Problems] In order to meet such demands, the headrest support structure according to the present invention includes an externally operable screw shaft that is rotatably mounted horizontally on the upper end side of the seat back, and this screw shaft. It is equipped with a pair of left and right stay holding members for tightly holding the left and right headrest stays attached to the shaft and hanging down from the headrest side, and each of these holding members is connected to a plate spring material in a substantially U-shape. By forming a curve to form a holding part in which the headrest stay is tightly held, a hole through which the screw shaft passes is bored in the side plate parts adjacent to this, and a hole for the screw shaft to pass through is formed in one of the holes. A nut portion to be screwed is provided, and a side plate portion on the other hole side is fixed to the seat back side.

[Effect]

According to the present invention, the head rest stay on the head rest side is inserted into the holding part of the stay holding member attached to the screw shaft on the seat back side, and the nut part is installed by rotating the screw shaft from the outside. The fixed side plate can be brought close to the other side plate fixed to the seat back side to bind and hold the desired portion of the stay by frictional force, or moved away from the other side plate to release the stay's binding state. In addition, the headrest can be supported in a vertically movable and adjustable manner via each stay.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIGS. 1 and 2 show an embodiment of the headrest support structure according to the present invention. In these figures, the headrest indicated by reference numeral 1 has a left side extending downward from its main body. By inserting and holding the right pair of headrest stays 2, 2 into the upper end side of the seat bag 3, the seat bag 3 is supported in a vertically movable state at the upper end thereof. In addition, numeral 4 in the figure is a seat bag frame made of a pipe body etc. installed inside the seat bag 3.

Now, according to the present invention, the support structure of the headrest 1, which is vertically movably supported at the upper end of the seat bag 3 as described above, is rotated to the upper end side of the seat bag, as shown in FIGS. 1 and 2. a screw shaft 10 that is horizontally mounted in a movable state and has a knob 10a for external operation at the outer end;
A pair of left and right stay holding members 11, 11 are attached to this screw shaft 10 and hold the left and right head rest stays 2, 2 in a tight manner. Holding parts 12, 12 for tightly binding and holding the respective headrest stays 2, 2 are formed by curving a leaf spring member having elasticity into a substantially U-shape, and side plate parts adjacent to the holding parts 12 are formed. 13 and 14 are provided with holes 13a and 14a through which the screw shaft 10 passes, a nut 15 is provided in one of the holes 13a as a nut portion to be screwed onto the screw shaft 10, and the other hole 14a
It is characterized in that the side plate portion 14 is fixed to a part of the seat bag 3 side (for example, the seat bag frame 4) by welding or the like. In addition, 16 in the figure indicates each of the pressing members 1.
This rubber is provided on the inner side of the holding portions 12, 12 of 1, 11 and is used to hold the stays 2, 2 with a required frictional force during binding. Also, 17 in the figure
is a lifting means having a spring 18 disposed below the stay holding member 11 in the seat bag 3 and applying an upward biasing force to the stay 2 held by the holding member 11; At the time of adjustment, it is urged upward and the push-in operation makes it easy to adjust the height to an appropriate position.

According to such a configuration, the head rest stays 2, 2 on the head rest 1 side are fitted into the holding parts 12, 12 of the stay holding members 11, 11 attached to the screw shaft 10 on the seat bag 3 side. ,
By rotating the screw shaft 10 from the outside to the LOCK side or the FREE side, the side plate part 13 on which the nut 15 is provided can be moved to the other side plate part fixed to the seat back frame 4 side. 14
It is preferable to move the stays 2, 2 close to the side and hold the stays 2, 2 tightly bound, or to release the stays 2, 2 from the tied state by moving them away from the other side plate portion 14 side. That is, by rotating the screw shaft 10, the clamping force of the stays 2, 2 by the presser members 11, 11 changes to a binding state or a released state, and thereby the headrest 1 can be moved in the vertical direction in the released state. By adjusting and tightening at the required position, it is possible to obtain a fixed and held state by the required frictional force.

Therefore, according to such a structure, the left and right stays 2, 2 on the headrest 1 side are moved by the left and right stay presser members 11, 11 provided on the seat back 3 side.
This makes it possible to securely tighten and hold the lock at the same time, and thereby prevent rattling and abnormal noises on the other side due to the conventional lock on one side. Since the stays 2, 2 are locked in the tied state, it is possible to finely adjust the height position of the headrest 1, which is a great practical advantage.

Here, on the screw shaft 10 described above, the left and right threaded portions (10 in FIG.
Of course, the threads (only one of which is shown in b) may be formed as threads in the same direction, or may be formed as threads in opposite directions. In this case, if the threads are in the same direction, the side plates 13, 13 on the movable side may be located on the same side of the seat bag 3, and if the threads are in the opposite direction, the left and right sides will be symmetrical. It is preferable that the holding members 11, 11 be provided on the screw shaft 10 in this manner.

Note that the present invention is not limited to the structure of the embodiments described above, and the shape and structure of each part may be modified and changed as necessary. For example, the support structure of the screw shaft 10 and its rotation It will be easily understood that appropriate modifications can be made to the operating means, the nut portion on the movable side plate portion 13 side of the presser member 11, and the like.

[Effect of idea]

As explained above, according to the headrest support structure according to the present invention, there is an externally operable screw shaft that is rotatably suspended horizontally on the upper end side of the seat bag, and a screw shaft that is attached to this screw shaft and is attached to the left and right side from the headrest side. It is provided with a pair of left and right stay holding members for tightly binding and holding the headrest stay, and each of these brackets is curved into a substantially U-shape to form a holding portion on which the headrest stay is tightly held. A hole through which the screw shaft passes is bored in both side plate parts adjacent to the seat back, a nut part to be screwed into the screw shaft is provided in one of the holes, and the side plate part on the other hole side is placed on the seat back side. Since it is fixedly installed, the left and right stays on the headrest side can be easily and firmly secured at the same time by using the left and right stay holding members provided on the seat back side, despite the simple and inexpensive structure. This prevents rattling and abnormal noises on the other side due to conventional locking on one side, and also allows each stay to be held in any position while being held in place by the presser member. Since it has a structure that can be locked in position, it has various practical effects such as being able to finely adjust the height position of the headrest.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the headrest support structure according to the present invention, and FIG. 2 is an enlarged perspective view of the main part showing the structure of the main part. In the figure, 1...Head rest, 2, 2...Head rest stay, 3...Seat back, 4...Seat back frame, 10...Screw shaft, 11, 11
... Stay pressing member, 12 ... Holding part, 13, 1
4... Side plate part, 13a, 14a... Hole part, 15...
...Natsuto (Natsuto part), 16...Rubber, 17...
...Lifting means, 18...spring.

Claims (1)

[Scope of utility model registration request] A support structure for a head rest that is vertically movably supported at the upper end of the seat back by a pair of left and right head rest stays, the support structure comprising an externally operable screw shaft that is rotatably installed horizontally at the upper end of the seat back. , a pair of left and right stay holding members attached to this screw shaft and tightly holding the left and right head rest stays, each of these holding members is formed by bending a plate spring material into a substantially U-shape. By doing so, a holding part is formed for tightly holding the headrest stay, and a hole through which the screw shaft passes is formed in both side plate parts adjacent to the holding part,
A headrest support structure characterized in that one hole is provided with a nut portion that is screwed onto the screw shaft, and a side plate portion on the other hole side is fixed to a part of the seat back side. .