JPH0433441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest device provided on a seat of a vehicle or the like.

For vehicle seats, especially automobile seats,
In order to reduce neck injuries in the event of a collision, a headrest is provided at the position where the occupant's head comes into contact.

This type of headrest has been put into practical use in such a way that it can be adjusted to move up and down and back and forth depending on the preference and body length of the person sitting on the seat. The moving positioning mechanism and the forward/backward moving positioning mechanism are each constructed separately, which results in a complicated structure and an increased number of parts, resulting in high costs.Also, each operating section is separate, making operation extremely complicated. It had this inconvenience.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a headrest device in which movement of a headrest main body can be adjusted in the vertical direction and in the front-rear direction with a simple operation.

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

FIG. 1 shows a seat equipped with a headrest device according to the present invention.
A headrest main body H is provided on the upper part of Sb so as to be movable and adjustable in the vertical direction and the front-back direction. Inside the frame 1 of this headrest main body H, as shown in FIG.
b is fixed. 3a and 3b are stays that are fixed substantially perpendicularly to the seat back side, and these stays 3a and 3b and rails 2a and 2b are connected to the support member 4.
A and 4b are pivotally supported substantially perpendicularly to each other, and are slidable in the axial direction.

One of the rails 2a and 2b, for example the right rail 2a, is provided with a plurality of notches 5 [5a, 5b...5n] as engaging parts at required intervals in the longitudinal direction, and the right stay 3a is provided with a plurality of notches 5 [5a, 5b...5n] as engagement parts. Also, a plurality of notches 6 [6a, 6a,
6b...6n], and one support member 4a that pivotally supports these is provided with a locking mechanism.

That is, as shown in FIG. 3, the support member 4a has a horizontal hole 11 for pivotally supporting the rail 2a and a vertical hole 12 for pivotally supporting the stay 3a. 13a, 13b are formed,
A first engagement member 15 and a second engagement member 16 are rotatably supported in a horizontal direction by a support shaft 14 between the projecting edges 13a and 13b. The first engaging member 15 and the second engaging member 16 are approximately L-shaped and have a substantially U-shaped cross section, and correspond to the tip claw portion 15a of the first engaging member 15 in the support member 4a. A through hole 17 that penetrates the horizontal hole 11 is formed at a position corresponding to the upper side edge 16a of the second engaging member 16, and a through hole 18 that penetrates the vertical hole 12 is formed at a position corresponding to the upper side edge 16a of the second engaging member 16. There is.

The first engaging member 15 is rotated by the biasing force of the torsion coil spring 19 inserted in the support shaft 14, and its tip claw portion 15a is inserted into the through hole 17, and a plurality of first engaging members 15 are provided on the rail 2a. The second engaging member 16 is adapted to engage with a corresponding one of the through hole 17 of the notch 5, and similarly, the second engaging member 16 is also rotated by the biasing force of the torsion coil spring 20 inserted into the support shaft 14. The upper surface side edge 16a is inserted into the through hole 18, and the through hole 1 of the notch 6 provided in the stay 3a in plurality.
It is designed to engage with the one corresponding to 8.

Further, projecting edge portions 21a and 21b are formed below the horizontal hole 11 of the support member 4a, and the projecting edge portion 21
An operating rod 22 serving as an operating member is supported on a and 21b so as to be slidable and rotatable in the axial direction thereof. A pressing pin 23 is implanted at the tip of the operating rod 22, and by rotating the operating knob 22a provided at the rear end, the pressing pin 23 is inserted into the first engaging member 15 and the first engaging member 15. It is configured to selectively abut the respective tip edges of the two engaging members 16. That is, the operating rod 22 can rotate within a range of about 90 degrees, and the pressing pin 23
is in contact with the leading edge 15b of the first engaging member 15 in the vertical position, and in contact with the leading edge 16b of the second engaging member 16 in the horizontal position, thereby restricting the rotation range.

Further, the operating rod 22 is always urged to slide outward by a coil spring 24 inserted between the protruding edges 21a and 21b, and the retaining ring 22
5 is fitted to restrict excessive movement in the axial direction.

Next, the operation of the headrest device of this example configured as described above will be explained.

First, when adjusting the movement of the headrest main body H in the longitudinal direction relative to the seat back Sb, use the operating rod 22.
The operation knob 22a is fully rotated to the position a shown in FIG. 5, that is, in the direction of the arrow a' shown in FIG. . In this state, when the operating knob 22a is pressed in the direction of arrow c by applying a predetermined force, the operating rod 22 slides inward, and the first engaging member 15 engages the pressing pin 23.
outwards (in the direction of arrow d) about the support shaft 14 against the biasing force of the torsion coil spring 19.
is rotated. Then, the tip claw part 15a is attached to the rail 2.
It comes off from the notch 5 of a and the locked state is released.
The rail 2a becomes slidable with respect to the support member 4a, and the frame body 1, that is, the headrest main body H
It becomes movable in the front and back direction with respect to a and 3b. After adjusting the desired position, the operating knob 22
When you release your hand from a, the operating rod 22 returns outward due to the biasing force of the coil spring 24, and the first engaging member 15 also returns inward (as indicated by the arrow d) due to the biasing force of the torsion coil spring 19. The rail 2 is rotated back in the opposite direction), and its tip claw portion 15a is inserted into the through hole 17, and the rail 2 is in a state corresponding to the through hole 17.
Locking is performed by engaging one of the notches 5 of a.

In addition, when adjusting the headrest main body H by moving it in the vertical direction relative to the seat back Sb, use the operating rod 22.
The operation knob 22a is fully rotated to position b shown in FIG. 5, that is, in the direction of arrow b' shown in FIG. . When the operating knob 22a is pressed with a predetermined force in this state, the operating rod 22 slides inward, and the second engaging member 16 resists the biasing force of the torsion coil spring 20 via the pressing pin 23. is rotated outward (in the direction of arrow d) about the support shaft 14. Then, the upper surface side edge 16a comes off from the notch 6 of the stay 3a and the locked state is released, and the stay 3
a becomes slidable relative to the support member 4a, and the frame 1, that is, the headrest main body becomes vertically movable relative to the stays 3a and 3b. After adjusting the height to the desired height, when the operating knob 23a is released, the operating lever 22 returns to the outside due to the biasing force of the coil spring 24, and the second engaging member 16 also twists and coils. Due to the biasing force of the spring 20, the stay 3 is rotated back inward (in the direction opposite to the arrow d), and its upper side edge 16a is inserted into the through hole 18, and the stay 3
Locking is achieved by engaging with the corresponding through hole 18 of the notch 6 provided in section a.

As described above, the movement of the headrest H in the longitudinal direction and the vertical direction is performed by rotating and pressing the operating knob 22a of the operating rod 22, so according to the headrest device of this example, only one operating rod is used. The vertical and longitudinal movements can be adjusted independently, making operation extremely easy.

In this example, a configuration example in which the locking mechanism is arranged on the right side is shown, but of course it may be arranged on the left side, and it can also be applied to a structure in which the stay is formed of a plate-shaped body. Even in this configuration, this example does not specify the present invention.

As described above, according to the present invention, it is possible to selectively release the locks in the vertical direction and the front-back direction with a single operating rod, so that independent movement adjustment in the vertical direction and the front-back direction can be performed with a simple operation. The present invention has great practical effects, such as realizing a headrest device with a simple structure and relatively low cost.

[Brief explanation of drawings]

FIG. 1 is a side view showing a seat equipped with a headrest device according to the present invention, FIG. 2 is a partially cutaway perspective view showing a frame portion of the headrest device according to an example of the present invention, and FIG. 3 is a main part thereof. FIGS. 4A and 4B are partially cutaway perspective views for explaining its operation, and FIG. 5 is a side view of the headrest device. In the diagram, S is the seat, H is the headrest body, 2a
is a rail, 3a is a stay, 4a is a support member, 5 and 6 are notches as engaging parts, 15 is a first engaging member, 16 is a second engaging member, 22 is an operating rod as an operating member, 23 is an engagement pin.

Claims (1)

[Claims] 1. In a headrest device installed on a seat of a vehicle, etc., a rail is fixed in the front-rear direction inside the frame of the headrest main body, and the rail and a stay fixed substantially perpendicularly to the seat side are connected via a support member. The rail and the stay are each provided with a plurality of engaging portions at required intervals in the longitudinal direction, and the supporting member is provided with a plurality of engaging portions of the rail so as to be slidable in the axial direction. A first engaging member having a portion that engages with the engaging portion of the stay, and a second engaging member having a portion that engages with the engaging portion of the stay are each pivotally supported to be rotatable in the horizontal direction. an operating member for selectively releasing the engagement of the engagement member with the engagement portion of the rail and the engagement of the second engagement member with the engagement portion of the stay; A headrest device characterized by being capable of independent movement adjustment in the vertical and vertical directions.