JPH0246755Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a head restraint device for a vehicle seat, and in particular to a head restraint device in which a stay supporting the head restraint can be folded down in the longitudinal direction of the seat back when the head restraint is pulled up a predetermined amount. Regarding equipment.

[Prior Art] This type of head restraint device is installed in the seat back of the front seat of a vehicle, and as shown in Fig. 5, when there is no occupant in the seat Sf, the stay is folded down as necessary to protect the occupant in the rear seat Sr. This ensures a wide field of view.

By the way, a conventional headrest device of this kind, as shown in Japanese Patent Laid-Open No. 59-14530, consists of a headrest, a stay attached to the headrest at its upper end and extending downward, and a stay attached to the back frame of the seat bag. It is equipped with a cylindrical stay guide that extends in the vertical direction and into which the stay is fitted so as to be movable up and down, and a lock mechanism that releasably locks the stay to the back frame side, so that the position of the headrest can be adjusted in the vertical direction. In such a headrest device, the stay is divided into upper and lower halves, which are rotatably connected to each other by a connecting pin at a hinge provided at both ends.
When the headrest is pulled up and the hinge portion of the stay projects upward from the stay guide, the stay is bent at the hinge portion and lies down.

[Problem that the invention attempts to solve]

However, in such a headrest device, the size of the hinge provided at the end of the divided stay, the thickness of the connecting pin, etc. are limited by the thickness of the stay, so the strength of the connecting portion is insufficient. In the worst case, there is a risk of damage to the connecting portion. In addition, in such a headrest device,
Adjusting the vertical position of the headrest and assembling it to the seat bag The upper stay requires a certain length, but the divided lower stay has no function in adjusting the position of the headrest or assembling it to the seat bag. Therefore, the overall length of the stay becomes unnecessarily long, and this also causes problems in assembling it to the back frame.

[Means for solving problems]

In order to deal with these problems, the present invention provides a headrest device in which the position of the headrest can be adjusted as described above, in which a rotating member is provided at the upper end of the back frame and above the stay guide in the front-rear direction of the seat back. The stay is rotatably assembled and inserted into the stay guide through an insertion hole provided in the rotary member, and the locking mechanism is provided between the stay and the rotary member so that the stay is attached to the rotary member. The stay is releasably locked.

[Functions and effects of the idea]

As a result, in the present invention, when the headrest is pulled up and the stay is pulled out from the stay guide, if this is locked to the rotating member via the locking mechanism, the stay and the headrest integrated therewith can be moved forward of the rotating member. It falls forward due to the rotation of the
To ensure a wide forward view of the occupants in the rear seats.

In this way, in the present invention, since the entire stay is laid down, there is no need for a connecting portion (hinge portion, connecting pin) that divides the stay into two and connects them rotatably. Therefore, insufficient strength due to the connecting portion does not occur, and the length corresponding to the lower stay is not required, so the overall length of the stay does not become unnecessarily long.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 shows a headrest device according to the present invention. The headrest device 10 is installed on a front seat 20 of a vehicle, and includes a headrest 11 and a pair of stays 12 that support the headrest 11.
and a stay guide 13, a rotating member 14 which constitutes the main part of the present invention, and a lock plate 15 which constitutes a lock mechanism, as shown in FIGS. 2 and 3.
The main components are a compression spring 16 and a spring retainer 17.

Both stays 12 have their upper ends attached to the head rest 11 and extend downward, and both stay guides 13 are attached to a first bracket 23 fixed to the upper end of a back frame 22 that constitutes the seat back 21 of the front seat 20. It is fitted and fixed to the upper end of the back frame 22 and the second bracket 24, which is fixed below the through hole 23a. Both stays 12 supporting the head rest 11 are fitted into these stay guides 13, and the head rest 11 is assembled to the upper end of the seat back 21 so as to be movable in the vertical direction.

On the other hand, the rotating member 14 is a substantially rectangular member extending in the left-right direction of the back frame 22 and having a curved front side.
It is attached to the first bracket 23 at both ends so as to be rotatable in the front-rear direction, and is located above both stay guides 13. A pair of recesses 14a are formed in the upper portions of both ends of the rotating member 14, and an insertion hole 14b facing each stay guide 13 is provided at the bottom of each recess 14a. The lock plate 15, compression spring 16, and spring retainer 17 that constitute the lock mechanism are connected to the rotating member 1.
It is assembled into each of the four recesses 14a.

The lock plate 15 is provided with an engagement hole 15a in its plate portion that faces the insertion hole 14b of the rotation member 14 and has a longer diameter in the left-right direction than the insertion hole 14b.
Lever part 1 extending upward from one end of the plate part
5b, and is assembled so as to be slidable in the left-right direction on the lower surface of the retainer 17 screwed into the recess 14a. Further, the retainer 17 is provided with an insertion hole 17a opposite to the engagement hole 15a, and the stay 12 that supports the headrest 11 is fitted into the stay guide 13 through the insertion hole 17a, the engagement hole 15a, and the insertion hole 14b. . Lock plate 15
is biased toward the end of the rotating member 14 by a compression spring 16 interposed between it and the retainer 17, and the periphery of the engagement hole 15a is connected to a plurality of engagement recesses 12a1 provided in the stay 12. ~12a3, 12b
1 and 12b2 to lock the stay 12 to the rotating member 14. Of these engaging recesses, one of the engaging recesses 12a1 to 12a3 is formed into a hook shape with a tapered portion downward, and the other engaging recesses 12b1 and 12b2 have a U-shaped cross section. is formed.

As a result, in this lock mechanism, the engagement recesses 12a1 to 12a3 of the stay 12 allow upward movement of the stay 12, but restrict downward movement, and the engagement recesses 12b1, 12
At b2, vertical movement of the stay 12 is restricted.

In the headrest device 10 configured as described above, the lock plate 15 is in the engagement recesses 12a1 to 12a3 of the stay 12 in normal use.
The stay 12 is rotated by engaging with one of the rotating members 14
The headrest 1 is integrated with the stay 12.
1 is supported in an upright position as shown by the solid line in FIG. In this state, the position of the lock plate 15 can be adjusted in the extending direction from the engagement recess 12a1 to the engagement recess 12b1 by simply pulling up the headrest 11 without operating the lock plate 15. 3. By operating in the direction of the arrow shown in the figure, the engagement with the stay 12 can be released, thereby making it possible to adjust the position of the headrest 11 in the direction of contraction. In addition, the engagement recess 12b1
functions to prevent the stay 11 from coming off, and defines the maximum amount of extension of the headrest 11.

Further, when the lock plate 15 is disengaged from the engagement recess 12b1 by operating the lock plate 15 and the headrest 11 is further pulled up, the stay 12 is moved to the stay guide 12 as shown by the two-dot chain line in FIG. The engagement recess 12 is pulled out from the
The lock plate 15 engages with b2. In this state, the stay 12 is released from the restraint by the stay guide 13 and can rotate forward together with the rotating member 14, moving the headrest 11 forward as shown by the two-dot chain line in FIGS. 1 and 4. It can be laid down. As a result, a wide field of view is ensured for the rear seat occupant. Note that in order to raise the headrest 11, first raise the headrest 11.
Pull it backward until it stops rotating. As a result, the rotating member 14 returns to its original state and the stay 1
2 to face the stay guide 13, the lock plate 15 is moved by operating the lock plate 15.
It is sufficient to release the engagement of the stay 12 with the engagement recess 12b2 and push down the headrest 11. As a result, the stay 12 is fitted into the stay guide 13 and restrained by the stay guide 13, and the lock plate 15 is inserted into the engagement recesses 12a1 to 12a.
3 or 12b1 to lock the stay 12 to the rotating member 14.

As described above, in this embodiment, when the headrest 11 is collapsed, the stay 12 is pulled out from the stay guide 13 and the entire stay 12 is rotated, so the stay 12 is divided into two parts and these parts are rotatably connected. There is no need to provide a connecting part to Therefore, lack of strength due to such a connecting portion does not occur, and the length corresponding to the lower stay portion is unnecessary, so that the overall length of the stay does not become unnecessarily long.

In addition, in the present invention, a shaft-shaped member can be used as the rotating member, and
Various known mechanisms can be employed as the locking mechanism.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a headrest device according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same device with the headrest and stay removed, and Fig. 3 is a perspective view of the headrest device according to an embodiment of the present invention. FIG. 4 is a schematic vertical side view of the device showing the state in which the headrest is supported, and FIG. 5 is a schematic side view showing the positional relationship between the front and rear seats. Explanation of symbols, 10...Headrest device, 11
...Headrest, 12...Stay, 12a1~
12a3, 12b1, 12b2...Engagement recess, 1
3... Stay guide, 14... Rotating member, 15...
... Lock plate, 21 ... Seat back, 22
...Back frame.

Claims (1)

[Scope of utility model registration request] a headrest, a stay whose upper end is attached to the headrest and extends downward; a cylindrical stay guide which is attached to the back frame of the seat back and extends in the vertical direction and into which the stay is fitted so as to be movable up and down; In the vehicle seat headrest device, which includes a locking mechanism that releasably locks on the back frame side and whose position is adjustable in the vertical direction, the headrest is rotated to a portion above the stay guide at the upper end of the back frame. A movable member is assembled so as to be rotatable in the longitudinal direction of the seat bag, the stay is inserted into the stay guide through an insertion hole provided in the rotatable member, and the lock mechanism is inserted between the stay and the rotary member. A headrest device for a vehicle seat, characterized in that the stay is releasably locked with respect to the rotating member.