JPH0347562Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat, particularly a headrest attached to a vehicle seat.

[Conventional technology]

For example, it is conventionally known that a headrest equipped with a pillow on which an occupant rests his or her head is attached to an automobile seat, and that such a pillow is supported so as to be able to reciprocate linearly in accordance with the occupant's body. Conventionally, the pillow was configured to be moved by rotating a handle attached to the pillow.
Since such a handle protrudes outward from the pillow, the handle inevitably becomes a nuisance to the occupant. Furthermore, each time the pillow position is adjusted, the handle must be rotated, making the operation very cumbersome.

[The problem that the idea attempts to solve]

An object of the present invention is to provide a headrest that eliminates the above-mentioned drawbacks of the conventional pillows and is capable of reliably stopping the pillow when it reaches its terminal position.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a pillow having a pillow body on which a seated person rests their head, a body holding member that fixedly supports the body, and a pillow that supports the pillow so that it can reciprocate linearly in the front and back direction of the seat. A headrest comprising a pillow support member and an adjustment means for adjusting the reciprocating movement of the pillow, wherein the adjustment means is fixed to either the pillow support member or the main body holding member, and the adjustment means is fixed to either the pillow support member or the main body holding member, and the adjustment means is fixed to either the pillow support member or the main body holding member, and a ratchet having teeth linearly arranged in a direction; a pawl meshing with the teeth of the ratchet and pivotally connected to the other of the pillow support member and the body holding member; formed on the ratchet; a first guide portion that guides and rotates the pawl in a direction in which the pawl of the pawl is disengaged from the teeth of the ratchet when the pillow moves a predetermined distance from its initial position in any one of the fore-and-aft directions; The pillow is provided on the other of the pillow support member and the main body holding member, and comes into contact with the pole to prevent rotation of the pole when the pillow moves in the one direction and reaches its terminal position. a first stopper formed on the ratchet for abutting against the pawl to prevent further movement of the pillow when the pillow moves in the one direction and reaches its terminal position; a second stopper attached to the one of the pillow support member and the main body holding member, the pawl of the pole is attached to the ratchet when the pillow moves from the terminal position in the other direction and returns to the initial position; a second guide portion that guides and rotates the pawl when the pillow moves in the other direction so as to mesh with the teeth of the pawl; and a spring that biases the pawl so that the pawl maintains the engaged state when the pawl of the pawl is engaged with the tooth, and the pawl maintains the engaged state. Suggest a headrest.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment in which the present invention is applied to a headrest of an automobile seat will be described in detail with reference to the drawings.

As shown in FIG. 1, a headrest 3 is provided above a seat back 2 of a seat 1 of an automobile. As shown in FIG. 2, the headrest 3 has a pillow body 4 on which a seated person (occupant) rests his or her head, and the body 4 is made of a material with cushioning properties. The pillow body 4 is fixedly supported by a body holding member 9 consisting of two side plates 5 and 6 spaced apart from each other and two covers 7 and 8 having a U-shaped cross section and fixed to the side plates 5 and 6. , the main body holding member 9 and the pillow main body 4 form an integrated pillow 1.
0 is configured.

The pillow 10 described above is supported by a pillow support member 11 on the seat back 2 (FIG. 1) of the seat 1 so as to be able to reciprocate linearly in the front-rear direction of the seat 1. Pillow support member 11 shown as an example in the figure
is a vertically extending 2 connected to the seat bag 2.
two stays 12, 13 and these stays 12, 1
It consists of a connecting member 14 that is firmly fixed to the stay 3 and extends horizontally, and pin supporting members 15 and 16 that are fixed to the upper ends of the stays 12 and 13, respectively. Each pin supporting member 15, 16 has a guide pin 17;
9 are provided protrudingly, and these pins 17, 18,
19 is slidably fitted into horizontally extending elongated holes 20, 21, 22 bored in the two side plates 5, 6, respectively. Also, one pin supporting member 15
The guide pin 24 is also attached to the ratchet 23 fixed to the
The pin 24 is also slidably fitted into an elongated hole 25 formed in the side plate 5 and extending in the horizontal direction.

In this way, the four pins 17, 18, 19, 24 provided on the pillow support member 11 side are connected to each side plate 5,
6, and thereby the pillow 10 is supported with respect to the seat back 2 of the seat 1 so as to be able to reciprocate in the front and rear directions. In this example, the pillow 10 moves in the front-rear direction between an initial position shown by a solid line in FIG. 1 and a terminal position shown by a chain line.

The reciprocating movement of the pillow 10 is adjusted and controlled by the adjustment means 26. Adjustment means 26 shown as a row in the figure
is one pin support member 1 of the pillow support member 11
5, a pole 28 pivotally attached to one side plate 5 of the main body holding member 9 via a pivot pin 27, and this pole 28 and the side plate 5.
It has a torsion coil spring 29 which has each end locked, a tension spring 30 which has each end connected to the connecting member 14 of the pillow support member 11 and the side plate 5 of the main body holding member 9, respectively. The ratchet 23 has teeth 33 arranged horizontally in a straight line in the front-rear direction of the seat 1.
1 and 32 mesh as described later. In this example, two claws 31 and 32 are formed on the pole 28, but it is also possible to have one claw or three or more claws. Further, as shown in FIG. 3, the winding portion 29a of the torsion coil spring 29 is located between the pole 28 and the side plate 5.

A more detailed configuration of the above-mentioned adjusting means 26 will be explained below along with its function.

4a to 4e are views for explaining the action of the adjusting means 26. When the pillow 10 is in the initial position shown in FIG. 2 and shown in solid lines in FIG. meshes with the teeth 33 of the ratchet 23 as shown in FIG. 4a. Here, a first locking position A where one end of the torsion coil spring 29 is locked to the side plate 5, and a second locking position B where the other end of this spring 29 is locked to the pole 28. A line connecting the two is defined as a first line C, and a line connecting the center of the pin 27 that pivots the pole 28 and the second locking position B is defined as a second line D. Second
The angle α formed by the line D with the line D is smaller than 180°. Therefore, the pawl 28 is subjected to an external force in the direction indicated by the arrow F in FIG. 4a by the torsion coil spring 29, and is given a rotational habit around the pin 27 in the clockwise direction in FIG. 4a. . For this reason, Paul 2
The pawls 31 and 32 of No. 8 are pushed into the teeth 33 of the ratchet 23 and remain in this state unless an external force is applied to the pillow 10. Of course, the above-mentioned pole 2
The claws 31 and 32 of No. 8 are in a locked state,
It never comes out of engagement.

Next, in order to adjust the position of the pillow 10, it is pushed from its initial position to either the front or rear direction of the seat 1. In this example, the direction indicated by arrow P,
That is, the pillow body 4 is pushed in the opposite direction to the direction in which the load of the seated person's head is applied. In this way, the pillow body 4
When pushed in one direction P in the front-rear direction, the pillow body 4 moves horizontally together with its holding member 9 against the action of the tension spring 30. At this time, each guide pin 17,
18, 19, 24 are the respective long holes 20, 21, 22, 2
5, the pillow 10 can be moved in the horizontal direction without tilting or rattling. Accordingly, the pawl 28 also moves in one direction P together with the side plate 5, and meshes with the teeth 33 of the ratchet 23 while swinging around the pin 27.

Here, when the pole 28 is in an intermediate position from the initial position shown in FIG. 4a to the position just before the terminal position shown in FIG. 4d, for example, in the position shown in FIGS. 4b and 4c, the above The angle α thus formed remains less than 180° so that the pawl 28 is given a clockwise rotational behavior in FIG. 4 by the torsion coil spring 29 and remains engaged with the ratchet 23. Therefore, if the pressing force on the pillow 10 is released at this time, the claws 31 and 32 of the pole 28 will be released.
engages the tooth 33 of the ratchet 23, and the pillow 10
The pillow can be stopped in its current position and the pillow can be locked in a desired intermediate position.

When the pillow 10 is pushed further and moves a predetermined distance in one direction P from its initial position until it reaches near the terminal position shown in FIG. ga ratchet 23
A cam-shaped first guide portion 3 formed in the right end region of
4, the pawl 28 is guided by this guide part 34, and its pawls 31, 32 are brought into contact with the ratchet 23.
counterclockwise around the pin 27 so as to disengage from the teeth 33 and reach the end position shown in FIG. 4d. At this time, the angle α becomes greater than 180°, and the torsion coil spring 29 exerts an external force on the pole 28 in the direction indicated by the arrow F' in FIG. 4d. When the pillow 10 moves in one direction P and reaches its terminal position in this way, the first stopper 35 protruding from the side plate 5 of the main body holding member 9 comes into contact with the pawl 28, and the pawl 28 rotates. prevent movement. Thus, the pawl 28 maintains its pawls 31, 32 disengaged from the teeth of the ratchet. At the same time, the pawl 31 of the pawl 28 comes into contact with a second stopper 34a formed on the ratchet portion above the first guide portion 34, thereby causing the pawl 28 and, therefore, the pillow 10
Further movement of the pillow 10 is prevented and the pillow 10 stops in its end position. That is, the first stopper 35
The pillow 10 is reliably stopped by the prevention of rotation of the pawl 28 and the cooperation between the second stopper 34a and the abutment of the pawl 28. Since the pillow 10 is stopped in this manner, the operator can reliably know that the pillow has reached its end position.

As described above, since the stop means for stopping the pillow 10 is constructed using the pole 28 and the first and second stoppers 35 and 34a, which are elements of the adjustment means, it is possible to provide other independent dedicated stop means. The cost can be reduced compared to the conventional method, and the structure can be simplified.

After bringing the pillow 10 to the final position, when you release your hand from the pillow body 4 and release the force applied to it, the claws 31 and 32 engage the teeth 33 of the ratchet 23.
Since it maintains a state away from the pillow 10
is biased toward its initial position by the action of the tension spring 30, and horizontally moves together with the pole 28 from the terminal position shown by the chain line in FIG. . Pillow 1 like this
0 moves in the other direction Q and the pole 28 returns to the position shown in FIG. The pawl 28 is guided while being pressed by the guide portion 36, and rotates around the pin 27 in the clockwise direction in FIG. 4. When the pillow 10 returns to its initial position in this way, the pole 28
The pawls 31 and 32 of the ratchet 23 mesh with the teeth 33 of the ratchet 23. At this time, α<180°, and the pole 28 is urged in the direction of arrow F by the spring 29, so the pole 28
8 maintains this state.

As mentioned above, the torsion coil spring 29 is such that the pawls 31 and 32 of the pawl 28 engage the teeth 33 of the ratchet 23.
When the pole 28 is detached from the
When the pawl 28 is in mesh with the teeth 33, it serves to bias the pawl 28 so that the pawl 28 maintains the state of meshing.

According to the above-described configuration, by simply pushing the pillow 10 with your hand, it is possible to horizontally move the pillow 10 to a desired position and hold it at that position, and it is also possible to return the pillow 10 to its initial position. It is sufficient to simply push it to its end position, and then the pawl 28 automatically disengages from the ratchet 23 and the pillow 10 automatically returns to its initial position.

In the above embodiment, the pole 28 was provided on the side of the main body holding member 9, and the ratchet 23 was provided on the side of the pillow support member 11, but these were completely reversed, and the corresponding effect as described above was obtained. Other members can also be arranged so that the That is, the ratchet 23 is fixed to either the pillow support member 11 or the main body holding member 9, and the pole 28 is fixed to either the pillow support member 11 or the main body holding member 9.
The first stopper 35 is also provided on the other of these members 11,9. Similarly, the second guide portion 36 is attached to one of the pillow support member 11 and the main body holding member 9.

It goes without saying that the main body holding member for fixing the pillow main body 4 and the pillow supporting member for supporting the pillow 10 may be formed in an appropriate form other than the shown form, and the adjusting means 26 can be attached to both side plates 5, 6. It is also possible to provide each. Add pillow to seat 1
It can also be configured to reciprocate in diagonal front and rear directions. Further, the pillow may be driven not manually but by a drive device, for example, an electric motor.

[Effect of idea]

According to the present invention, there is no need to use a handle that gets in the way of the seated person, and the pillow can be moved extremely easily without turning the handle, improving operability. Further, the pillow can be reliably stopped at a predetermined end position by the second stopper, and since the second stopper is formed on the ratchet itself, cost reduction and structural simplification can be achieved.

[Brief explanation of drawings]

Fig. 1 is a side view showing the seat and the headrest attached to it, Fig. 2 is a perspective view showing details of the headrest, with some constituent members shown in chain lines, and Fig. 3 is a side view showing the seat and the headrest attached to it. FIG. 2 is a partially exploded perspective view, and FIGS. 4 a to 4 e are explanatory views showing the operating state of the headrest. 1... Seat, 3... Head rest, 4... Pillow body, 9... Body holding member, 10... Pillow,
11... Pillow support member, 23... Ratchet,
26... Adjustment means, 28... Pole, 29... Torsion coil spring, 30... Tension spring, 31, 32
...Claw, 33...Teeth, 34...First guide part, 3
4a...Second stopper, 35...First stopper, 36...Second guide portion, P...One direction, Q...
...the other direction.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pillow 10 having a pillow body 4 on which a seated person rests his or her head, a body holding member 9 that fixedly supports the body 4, and a pillow 10 arranged in a straight line in the longitudinal direction of the seat 1; In the headrest 3, the headrest 3 includes a pillow support member 11 that supports the pillow support member 11 in a reciprocating manner, and an adjusting means 26 for adjusting the reciprocating movement of the pillow 10, wherein the adjusting means 26 supports the pillow support member 11 and the main body holding member. a ratchet 23 fixed to either one of the seats 9 and having teeth 33 arranged linearly in the front-rear direction of the seat 1;
The pillow support member 11 and the main body holding member 9
a pawl 28 pivotally attached to the other side of the pawl 28; and a pawl 28 formed on the ratchet 23, when the pillow 10 moves a predetermined distance from its initial position in one direction P of the fore-aft direction, the pawl 31 of the pawl 28 , 32 are provided on the other of the pillow support member 11 and the main body holding member 9. , a first stopper 35 that comes into contact with the pawl 28 to prevent rotation of the pawl 28 when the pillow 10 moves in the one direction P and reaches its terminal position;
and is formed in the ratchet 23, and when the pillow 10 moves in the one direction P and reaches its terminal position, comes into contact with the pawl 28 to prevent further movement of the pillow 10. a second stopper 34a attached to the one of the pillow support member 11 and the main body holding member 9, when the pillow 10 moves from the terminal position in the other direction Q and returns to the initial position. Claw 3 of the pole 28
When the pillow 10 moves in the other direction Q, the pawl 28 is guided and rotated so that the pawls 1 and 32 mesh with the teeth 33 of the ratchet 23.
The guide portion 36 and the pawls 31 and 32 of the pawl 28 are connected to the teeth 33.
When the pole 28 is detached from the
1 and 32 are meshed with the teeth 33, and a spring 29 that biases the pawl 28 so that the pawl 28 maintains the meshed state. (2) It has a tension spring 30 that urges the pillow 10 toward its initial position, and each end of the tension spring 30 has a
The headrest 3 according to claim 1, which is connected to the main body holding member 9 and the pillow supporting member 11. (3) The head rest 3 according to claim 1 or 2, wherein the spring 29 is a torsion coil spring 29.