JP2596497Y2 - Raised headrest - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an undulating headrest for a vehicle seat.

[0002]

2. Description of the Related Art As a headrest of a vehicle seat, there is an undulating headrest as disclosed in Japanese Utility Model Laid-Open No. 61-158247. The up-and-down headrest is configured such that the headrest in the upright state of the seat in front of or behind the seat on which the occupant sits falls down as necessary so that the occupant of the vehicle has a greater field of view.

In the above-mentioned undulating headrest, the headrest body is composed of two front and rear blocks, and the first block is supported at its lower end on the top of the seatback so as to be rotatable in the front and rear direction. The second block is rotatably supported at its upper end by the upper end of the first block, and the second block is superimposed on the first block in a state where the second block is superimposed on the first block. Is configured to be releasably fixed with respect to. This allows
If the fixing of the second block body to the first block body is released and the two block bodies are rotated forward with the lower end portion of the first block body as a base point, the two block bodies become the seatback. It lays down along the top front from the top to ensure a large view ahead or behind the occupant.

[0004]

In the headrest, when the headrest body falls down, the second
The lower end of the first block is released from being fixed to the lower end of the first block, and the second block rotates about the upper end thereof and separates from the first block. For this reason, the second block body rotates while sliding its lower end portion on the top of the seatback, and the second block body is caught on the top of the seatback during the falling operation, impairing operability. At the same time, the top portion may be worn and damaged. Therefore, an object of the present invention is to solve these problems.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an undulating headrest for a vehicle seat, the first headrest being supported by a stay projecting from the top of the seatback and fixedly located at the top of the seatback. And a first part which is fitted to the upper part of the first headrest part and is rotatably supported at one of the front and rear sides of the headrest part at the lower end part so as to be rotatable in the front-rear direction and forms a headrest body together with the headrest part. A headrest portion, a rotation mechanism for the second headrest portion, and a lock mechanism for restricting the operation of the rotation mechanism, wherein the rotation mechanism is provided on one of the headrest portions. Means, a connecting member wound around the winding means and connected to one of the headrest portions, and a spring means for urging the winding means in a direction for winding the connecting member. Has a structure and is characterized in that the locking mechanism has a structure in which a locking means for releasably restricting the rotation of the winding means.

[0006]

In the undulating headrest constructed as described above, the connecting member is wound around the winding means by the action of the spring means, and the second headrest part is formed by the first headrest part. To form an upright headrest body. In this case, the rotation of the winding means is restricted by the action of the lock mechanism,
The headrest main body is maintained upright without falling down.

[0007] In order to fall down the headrest main body, the rotation restriction of the winding means is released by the locking means constituting the locking mechanism. Thereby, the winding means can rotate against the spring means, and the second headrest portion can rotate. Therefore, if the second headrest is turned forward or backward, the headrest is turned in the same direction against the spring means and falls down. Thereafter, if the rotation of the winding means is restricted in a state where the second headrest portion is lying down, the falling state of the second headrest portion is maintained.

By the way, in the headrest,
When the second headrest portion falls down, the second headrest portion rotates in the front-rear direction around the lower end portion on one of the front and rear sides of the headrest portion.
There is no sliding contact with the top of the seatback, so that the second headrest does not catch on the top of the seatback and impairs operability, and there is no danger that the top will be worn and damaged.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a headrest according to the present invention. The headrest is a headrest body 10
, A rotation mechanism 20 and a lock mechanism 30. The headrest body 10 is the first headrest section 1
The first headrest 11 is fixed to a stay 41. The stay 41 is fixed to a back frame constituting the seat back 42 and protrudes from the top of the seat back 42.
The first headrest 11 is fixedly arranged on the top. Therefore, the first headrest portion 11 forms a base of the headrest body 10.

The second headrest portion 12 constitutes a support portion for supporting the head of the occupant. The second headrest portion 12 is turned at the front lower end thereof via a hinge 13 to the front end of the first headrest portion 11 in the front-rear direction. It is movably supported. Therefore, the second
When the headrest portion 12 is located rearward, the headrest body 10 constitutes an upright headrest body, and when turned forward, the headrest body 10 falls down forward.

The rotating mechanism 20 includes a reel 21 and a connecting belt 2.
2, a large diameter gear 23, a small diameter gear 24, and a spiral spring 25. The reel 21 is rotatably supported by a bracket 12b erected on a base plate 12a at the bottom of the second headrest portion 12, and is accommodated in a case 12c. Have been. One end of the connection belt 22 is wound around the reel 21 and the other end passes through the bottom of the base plate 12a and is fixed to the rear end of the first headrest portion 11. Thus, the headrest portions 11 and 12 are connected to each other by the connection belt 22. A spiral spring 25 is interposed between the reel 21 and the bracket 12b, and the reel 21 is constantly urged in a direction of winding the connection belt 22.

The small-diameter gear 24 is supported coaxially with the reel 21 by the bracket 12b, and is rotatable integrally with the reel 21. The large-diameter gear 23 includes a gear portion 23a and a side plate portion 23b, and a cutout recess 23c is formed in the side plate portion 23b. The large-diameter gear 23 is rotatably supported below the small-diameter gear 24 in the bracket 12b, and meshes with the small-diameter gear 24. The number of teeth of both gears 23 and 24 is formed such that the side plate portion 23b makes one rotation in a state where the second headrest portion 12 is laid down forward as shown in FIG.

The lock mechanism 30 comprises a lock pin 31, first and second links 32 and 33, an operation button 34, and a tension spring 35. The lock pin 31 is connected to the base plate 12a of the second headrest portion 12.
Is slidably inserted in the left-right direction, and the large-diameter gear 23
And is engageable with the cutout recess 23c. The operation button 34 is the case 12
c are slidably fitted to the side of
33 connects to the lock pin 31. Link 3
A tension spring 35 is interposed between the case 2 and the case 12c, and constantly biases the lock pin 31 toward the side plate portion 23b and constantly biases the operation button 34 outward.

In the headrest thus constructed, when the headrest main body 10 is in the upright state, the lock pin 31 is engaged with the cutout recess 23 of the side plate portion 23b.
c, and the operation button 34 has moved to the outside position. In this state, the rotation of the reel 21 is restricted via the two gears 23 and 24, the rotation mechanism 20 is in the locked state, and the headrest main body 10 maintains the upright state and exhibits the original function of the headrest.

In order to make the headrest main body 10 fall down in the headrest, the operation button 34 is first pressed and the second headrest portion 12 is turned forward. As a result, the lock pin 31 of the lock mechanism 30 is disengaged from the cutout recess 23c of the side plate 23b, and the two gears 23 and 24 can be rotated.
The second headrest portion 12 is rotatable against the spiral spring 25. For this reason, the second headrest portion 12 can fall forward as shown by the two-dot chain line in FIG. In this fall state, the side plate portion 23b of the large-diameter gear 23 makes one rotation and the notch recess 23c faces the lock pin 31, so that the lock pin 31 engages with the recess 23c to rotate the reel 21. Regulate. As a result, the second headrest portion 12 is maintained in a forwardly lying state.

In order to return the headrest body 10 to the upright state from this state, the operation button 34 of the lock mechanism 30 is used.
Push operation. As a result, the lock pin 31 is detached from the cutout recess 23c of the side plate portion 23b, and the reel 21 is rotatable. The reel 21 rotates in the return direction by the action of the spiral spring 25 to rotate the connecting belt 22.
And the connecting belt 22 rotates the second headrest portion 12 backward and fits on the first headrest portion 11.
Thereby, the headrest main body 10 returns to the upright state.

By the way, in the headrest,
When the second headrest portion 12 falls down, the second headrest portion 12 pivots forward about the front lower end portion of the headrest portion 12, so that the second headrest portion 12 is seated back 42 during the falling down operation.
Does not come into sliding contact with the top of the second headrest portion 12.
There is no risk of operability being impaired by being hooked on the top of the seat back 42, and there is no risk of the top being worn and damaged.

In this embodiment, an example has been described in which the second headrest portion 12 is configured to fall forward, but in the present invention, the second headrest portion 1 is provided.
The rear lower end of the second headrest portion 2 can be rotatably supported by the first headrest portion 11, and the second headrest portion 12 can be configured to be able to fall backward. In this embodiment, the example in which the rotation mechanism 20 and the lock mechanism 30 are provided on the second headrest portion 12 side has been described. In the present invention, both of the mechanisms 20 and 30 are provided on the first headrest portion 11 side. You may do so.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a headrest main body constituting a headrest according to an embodiment of the present invention.

FIG. 2 is an arrow 3-3 in FIG. 2 of the headrest main body.
FIG. 3 is a partial longitudinal sectional view seen in a line direction.

FIG. 3 is a schematic side view showing an operation state of a headrest main body constituting the headrest.

[Explanation of symbols]

10 headrest body, 11 first headrest part,
Reference numeral 12: second headrest portion, 20: rotating mechanism, 21: reel, 22: connecting belt, 23: large-diameter gear, 23c: cutout recess, 24: small-diameter gear, 25: spiral spring, 30: locking mechanism, 31 ... Lock pins, 32, 33
... Link, 34 ... Operation button, 35 ... Tension spring, 41 ... Stay, 42 ... Seat back.

Claims (1)

(57) [Scope of request for utility model registration] 1. A first seat which is supported by a stay protruding from the top of a seat back and is fixedly located on the top of the seat back.
And a headrest body which is fitted to the upper portion of the first headrest portion and is rotatably supported at the lower end on one of the front and rear sides of the headrest portion in the front-rear direction to form a headrest body together with the headrest portion. A second headrest portion, a rotation mechanism for the second headrest portion, and a lock mechanism for restricting the operation of the rotation mechanism. The rotation mechanism is provided on one of the headrest portions. A take-up means, a connecting member wound around the take-up means and connected to one of the headrest portions, and a spring means for urging the take-up means in a direction in which the connecting member is taken up. An undulating headrest, wherein the locking mechanism is configured to include a lock unit that restricts rotation of the winding unit so that the rotation of the winding unit can be released.