JPH0975166A - Fitting structure of headrest for seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure of headrest for seat, in which the number of parts is decreased and a release lever is kept from being exposed on the outer surface of a backrest. SOLUTION: The fitting structure of headrest for seat comprises an engaging recessed part 4d provided on a support shaft 4c of a headrest 4, a plate spring 6 which is provided in a support hole 2c and fitted in the engaging recessed part 4d of the headrest 4, and a backrest part cover 2b for covering the backrest part main body 2a and the plate spring 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat headrest mounting structure, and more particularly to an improvement in a seat headrest mounting structure.

[0002]

2. Description of the Related Art Generally, in car seats, child seats, and the like used in automobiles, a headrest is attached to the upper end of a backrest. For fixing the headrest to the backrest, a lock mechanism that engages with a support shaft provided in the headrest is provided inside the backrest, and a lever for releasing the lock mechanism is provided on the outer surface of the backrest, By operating this lever, the headrest is fixed.

However, in order to provide the lever for releasing the lock mechanism outside the backrest, the structure of the lock mechanism becomes extremely complicated, resulting in a large number of parts and a high cost for car seats and the like. There is a problem that it ends up.

Further, when the lever for releasing the lock mechanism is exposed on the outer surface of the backrest, there is a problem that the external appearances of the car seat and the child seat are impaired.

The present invention has been made to solve the above problems, and provides a seat headrest mounting structure in which the lock mechanism is simple and the release lever of the lock mechanism is not exposed to the outer surface of the backrest. The purpose is to

[0006]

A seat headrest mounting structure according to the present invention has a backrest body by inserting a support shaft into a backrest body and a support hole provided at an upper end of the backrest body. A headrest fixed to the headrest, an engagement recess provided in a support shaft of the headrest, an engagement portion provided in the support hole and fitted in the engagement recess of the headrest, and exposed on the back side of the backrest body. A lock member having a movable portion that controls engagement or release of the engagement portion with respect to the engagement recess, and a backrest portion cover that covers the backrest body and the lock member.

By using the above structure, the movable portion of the lock member is controlled from the outer surface through the backrest cover, so that the engagement portion of the lock member engages with or disengages from the engagement recess of the support shaft. Therefore, the lock member is not exposed on the outer surface of the backrest. As a result, the design of the seat having this structure will not be impaired.

Further, since the headrest locking mechanism is only the engaging recess and the locking member provided on the support shaft,
Since the structure is simple and the number of parts is small, the cost of the seat can be kept low.

In a preferred form, the backrest cover is provided with a mark for indicating the position of the movable portion of the lock member. As a result, it becomes possible for a user using a seat having a seat headrest having this structure to easily adjust the headrest, and the headrest can be adjusted even in a dark place or while sitting on the seat. It becomes possible to do it.

In a preferred form, the lock member is constructed by using a leaf spring. By using the leaf spring in this manner, it is possible to reliably engage the engaging recess, and it is possible to improve the reliability of the mounting structure of the seat headrest.

In a preferred form, the tip of the support shaft has a taper shape that becomes thinner toward the tip. With this structure, when the headrest is inserted into the support hole of the seat portion, it is possible to insert the locking member while gradually expanding the engaging portion of the lock member, so that workability when inserting the headrest into the backrest portion is improved. It becomes possible to make it easy.

In a preferred form, the support shaft is
It has a plurality of engaging recesses. By having a plurality of engaging recesses in this way, it becomes possible to adjust the height of the headrest with respect to the backrest. Therefore, in the seat having the mounting structure of the headrest for a seat, it becomes possible to adjust the height of the headrest according to the body shape of the person who uses the seat, and to provide the user with a comfortable sitting comfort. Is possible.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A case in which the seat headrest mounting structure of the present invention is applied to a child seat will be described below with reference to the drawings.

First, the overall structure of the child seat 1 will be described with reference to FIG. Child seat 1
Is provided with a backrest portion 2, a seat portion 5, and a side guard 3 for supporting a child from the side surface side on the side surface of the backrest portion 2 to the seat portion 5. A headrest 4 is provided on the upper end of the backrest 2.

Next, the mounting structure of the headrest 4 in the backrest portion 2 will be described with reference to FIG.

First, the headrest 4 includes a headrest body 4a made of urethane foam and the like, and the headrest cover 4 so as to cover the entire surface of the headrest body 4a.
b, and further has a support shaft 4c for insertion into a support hole 2c provided in the backrest 2.

Further, the support shaft 4c is provided with three engaging recesses 4d which are notched all around the support shaft 4c. Further, the tip end portion of the support shaft 4c is provided with a taper 4e so as to be gradually tapered toward the tip end.

On the other hand, the backrest portion 2 has a backrest portion body 2a made of urethane foam and the like, and a backrest portion cover 2b for covering the entire surface of the backrest portion body 2a.

Support holes 2 provided in the backrest body 2a
A support shaft guide member 2d for receiving the support shaft 4c of the headrest 4 is provided in c.

A leaf spring 6 is fixed to the support shaft guiding member 2d, and in the state shown in FIG.
Engagement recess 4d in which leaf spring 6 is provided in support shaft 4c
And the support shaft 4c is locked.

The backrest cover 2b is provided with a press nameer 7 for notifying the position of the leaf spring 6.

Next, referring to FIGS. 3 to 4, the support shaft 4c by the leaf spring 6 in the cross section taken along the line X in FIG.
The lock state and the lock release state of will be described.

First, referring to FIG. 3, the leaf spring 6 is processed into the shape shown in FIG. 3, and one end of the leaf spring 6 is fixed to the support shaft guide member 2d using a rivet 8.

In the locked state, the engaging portion 6a of the leaf spring 6 is fitted in the engaging recess 4d of the support shaft 4c. In this state, the leaf spring 6 is always biased in the direction of coming into contact with the support shaft 4c.

Next, in the unlocked state, as shown in FIG. 4, the movable portion 6b of the leaf spring 6 is pressed in the direction shown by the arrow in the figure, so that the engaging portion 6a is engaged with the engaging recess of the support shaft 4c. By being separated from 4d, the lock of the support shaft 4c by the leaf spring 6 is released.

As described above, it is possible to realize a structure having an extremely simple structure and in which all the lock mechanisms are incorporated inside the backrest body.

Further, since the support shaft 4c is provided with a plurality of engaging recesses 4d as shown in FIG. 2, the headrest 4 can be moved in the direction shown by the arrow in the figure while releasing the lock mechanism. Thus, it becomes possible to adjust the height direction of the headrest.

Further, by providing the taper 4e at the tip of the support shaft 4c, the leaf spring 6 can be gradually moved outward by the taper 4e when the headrest 4 is inserted into the backrest 2. Therefore, it is possible to facilitate workability when the headrest 4 is attached to the backrest 2.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. Therefore, in the above embodiment, the leaf spring 6
Although the press namer 7 is attached to the backrest cover 2b to inform the position of the above, the present invention is not limited to this pressnamer 7, and a predetermined mark may be printed on the backrest cover 2b in advance.

In the above embodiment, the case where the seat headrest mounting structure is applied to the child seat has been described, but the present invention can be applied to all car seats used in automobiles and other seats to which headrests are mounted. Is. The scope of the present invention is shown not by the above description but by the scope of claims for patent, and it is intended that all modifications within the scope and meaning equivalent to the scope of claims for patent are included.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of a child seat.

FIG. 2 is a sectional view for explaining a mounting structure of a seat headrest.

FIG. 3 is a cross-sectional view showing a locked state of a seat headrest attachment structure.

FIG. 4 is a cross-sectional view showing a lock released state of a seat headrest mounting structure.

[Explanation of symbols]

 1 Child Seat 2 Backrest 2a Backrest Main Body 2b Backrest Cover 2c Support Hole 2d Support Shaft Guide Member 3 Side Guard 4 Headrest 4a Headrest Body 4b Headrest Cover 4c Support Shaft 4d Engagement Recess 4e Taper 5 Seat 6 Press Leaf Spring 7

Claims (5)

[Claims] 1. A backrest main body, a headrest fixed to the backrest main body by inserting a support shaft into a support hole provided at an upper end of the backrest main body, and a headrest provided on the support shaft of the headrest. And an engaging portion that is provided in the support hole and that fits into the engaging recess of the headrest, and the engaging recess of the engaging portion that is exposed on the back side of the backrest body. A mounting structure for a headrest for a seat, comprising: a lock member having a movable part that controls engagement or disengagement with the seat backrest; and a backrest cover that covers the backrest body and the lock member. 2. The seat headrest mounting structure according to claim 1, wherein the backrest cover has a mark for indicating a position of the movable portion of the lock member. 3. The seat headrest mounting structure according to claim 1, wherein the lock member is a leaf spring. 4. The mounting structure for a seat headrest according to claim 1, wherein a tip end portion of the support shaft has a taper shape that becomes thinner toward the tip end. 5. The seat headrest mounting structure according to claim 1, wherein the support shaft has a plurality of the engaging recesses.