JP2562341B2 - Headrest for vehicle - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle, and more particularly to a headrest attached to a seat of an automobile.

2. Description of the Related Art It is well known in the art to provide a headrest that supports the head of an occupant on the upper part of the seat back of a seat arranged in a vehicle compartment. The headrest has a headrest main body for supporting the head and a stay for supporting the headrest on a seat back, and the headrest main body is supported so as to be tiltable in the front-rear direction according to the physique and preference of an occupant. in this case,
A structure in which a ratchet and a pawl that engages with the ratchet are provided, and these are engaged with each other to fix the headrest main body at a desired inclined position is widely used. However, since this headrest adjusts the position of the main body in stages, the fixed position of the main body is limited, and it is inevitable that the user feels some inconvenience. Moreover, the structure related to the ratchet becomes complicated, the number of parts thereof increases, and the cost becomes high, which is inevitable.

Therefore, while the headrest main body is rotatably supported with respect to the stay, friction members are provided on both the headrest main body and the headrest main body that can hold the headrest main body at a desired inclined position by the frictional force acting between them, became. With this configuration, the position of the headrest body can be adjusted steplessly. However, even in this type of headrest, since a friction member is required, the number of parts is increased, and there is a drawback that rattling easily occurs between parts due to manufacturing error of each friction member itself and assembly error of these. there were.

OBJECT The object of the present invention is to provide an inexpensive and lightweight headrest that can adjust the tilted position of the headrest body steplessly, can reduce the number of parts, and is inexpensive.

Structure In order to achieve the above object, the present invention engages the upper part of a stay fixed to a seat back with an engaging groove of a mounting block, fits the block into a recess of a headrest main body, and the main body and the mounting block. The headrest body and the mounting block are pressed against each other by tightening the fastening members inserted in and, and a force is applied to the stay by the headrest body portion and the mounting block portion that are in contact with the stay. And by this power,
A headrest for a vehicle is proposed, which produces frictional forces between the stay and the headrest body and between the stay and the mounting block.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a headrest body made of, for example, hard synthetic resin, 2 is a mounting block made of hard synthetic resin, and 3 is a stay for supporting the headrest body 1. For example, it is composed of a metal pipe or the like. A pad (not shown) made of foam or the like is put around the headrest body 1, and a cover (not shown) is also put around the pad, so that both legs 7, 7 of the stay 3 are seated back (not shown). ) Is inserted and fixed. Headrest body 1
A through hole 11 into which the bolt 10 is inserted is formed in the hole as described later.

As shown in FIGS. 3 and 4, an engaging groove 4 is formed in the mounting block 2, and projections 5, 5 are provided on both sides of the engaging groove 4. The upper portion 6 of the stay 3 formed in a U shape is engaged in the engaging groove 4, and the portion of the stay upper portion 6 protruding from the engaging groove 4 is located on each of the protrusions 5, 5. A screw hole 18 is formed in the upper portion of the central base portion 9 of the mounting block 2.

As described above, the mounting block 2 having the stay 3 assembled therein fits into the recess 8 formed in the lower region of the headrest body 1 as shown in FIG. The concave portion 8 has a large central portion 8 formed at the center thereof and a narrow portion 8 formed on both sides thereof.
It consists of b and 8b, and as is clear from FIG. 2, the central part 8a
The base portion 9 of the mounting block 2 is fitted to the, and the protrusions 5 and 5 of the mounting block 2 are fitted to the narrow portions 8b and 8b, respectively. In this way, the mounting block 2 is assembled to the headrest body 1, and the upper portion 6 of the stay is sandwiched between the body 1 and the block 2.

With the mounting block 2 assembled to the headrest main body 1 as described above, the through hole 11 formed in the main body 1 and the screw hole 18 of the mounting block 2 are aligned with each other, and they are fastened with, for example, an adjusting bolt 10. The member is inserted, the bolt 10 is screwed into the screw hole 18, and the headrest body 1, the mounting block 2 and the stay 3 are integrally assembled.

In this case, in the state before tightening the bolts 10, the mounting block 2 and the stay 3 are attached to the headrest body 1.
There is an appropriate clearance between them as shown in FIG. When the bolt 10 is tightened in this state, the mounting block 2 receives a force pulling upward as shown by arrow A in FIG. 5, and conversely the headrest body 1 is pushed downward as shown by arrow B. Then, the two are pressed in a direction toward each other. Therefore, the portion of the stay 3 engaged with the engaging groove 4 of the mounting block 2 receives an external force in the direction of the arrow A, and protrudes from the engaging groove 4 to form 1a, 1a at the bottom of each narrow portion 8b, 8b. The stay part that contacts is arrow B, which is the opposite direction of arrow A.
You will receive an external force in the direction. Therefore, the upper portion 6 of the stay 3 receives a force in a direction in which it is elastically deformed, as shown in FIG. As a result, between the engagement groove 4 of the mounting block 2 and the stay portion fitted therein, between the bottom portions 1a, 1a holding the stay 3 and the stay 3, and also in the block 2 holding the stay. Projections 5,5 and stay 3
Friction force is generated between and. Therefore, as shown in FIG. 1, when an occupant puts his / her head H lightly on the headrest body 1 covered with a pad and a cover for the purpose of rest,
The frictional force holds the headrest body stationary. The same is true even if the vibration caused by running the vehicle acts on the headrest body 1.

On the other hand, when the occupant applies a force to overcome the frictional force to the headrest main body 1 in the front-back direction as indicated by the arrow C or D, the main body 1 moves in the C or D direction with respect to the stay 3 fixed to the seat back. Can be tilted to. In other words, the tightening force of the adjusting bolt 10 is adjusted so that the headrest body 1 can be tilted and the headrest body 1 can be held stationary during normal use.

Also, when an undesired shocking external force is applied to the car,
Even if the headrest body 1 is rotated rearward by the force from the head H, the stopper surface 15 of the body 1 comes into contact with the stay 3, so that the headrest body 1 cannot meet further rearward. The function as a headrest can be achieved without any hindrance.

According to the above-described configuration, the headrest body can be freely tilted in the front-rear direction, and the tilted position can be adjusted to the physique or preference of the occupant, and the adjustment can be performed steplessly. Moreover, since the headrest body 1 tilted to the desired position can be held by the frictional force between the stay 3 and the body 1 or the mounting block 2, it is not necessary to provide a special friction member as in the conventional case. Therefore, not only the number of parts can be reduced, but also rattling due to an assembling error of the friction member can be prevented. Moreover, since the tilting operation mechanism of the headrest main body is housed inside the main body and is not exposed to the outside, it is possible to enhance the appearance of the headrest.

In the illustrated embodiment, a fastening member made of the bolt 10 is inserted from above the headrest body 1 so that the fastening force can be adjusted.
As a matter of course, it may be configured so that it can be attached from an appropriate direction such as a downward direction.

Effect According to the present invention, the position of the headrest main body can be adjusted steplessly, and further, the number of parts can be reduced and rattling can be prevented.

[Brief description of drawings]

FIG. 1 is an external perspective view of a headrest, in which a pad and a cover are omitted, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is an exploded perspective view thereof. The figure is a perspective view of the mounting block alone, and FIG. 5 is an explanatory view showing the state before tightening the bolts. 1 ... Headrest body, 2 ... Mounting block 3 ... Stay, 4 ... Engagement groove 6 ... Top of stay, 8 ... Recess

Claims (1)

(57) [Claims] 1. Fastening in which an upper portion of a stay fixed to a seat back is engaged with an engaging groove of a mounting block, the block is fitted into a recess of a headrest body, and the body and the mounting block are inserted and fastened. The member is tightened to press the headrest main body and the mounting block in a direction approaching each other, and the headrest main body portion and the mounting block portion abutting on the stay exert a force in a direction of deforming the stay, and by this force. A headrest for a vehicle, wherein frictional forces are generated between the stay and the headrest body, and between the stay and the mounting block.