JPH0716363Y2 - Car seat equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle seat device having a headrest.

[Conventional technology]

Conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 62-107754, a headrest is rotatably assembled to the upper end of the seat back, and when the headrest is used, the headrest is locked in an upright state, and when the headrest is not used Release the locked state of the headrest with the operating lever,
There is known a structure in which the headrest is displaced to the lying state to secure the rear view of the driver.

[Problems to be solved by the device]

Since the conventional seat device is configured to release the locked state of the headrest by operating the operation lever, when the operation lever is installed in the vicinity of the headrest, the operation lever is exposed at a conspicuous position. Therefore, there is a problem that the appearance and habitability are deteriorated. Further, it is possible to install the operation lever inconspicuously at a position apart from the headrest, but in this case, a transmission member for transmitting the operation force of the operation lever is required and the structure becomes complicated, There is a problem that operability is reduced.

The present invention has been made in order to solve the above problems, and provides a vehicle seat device capable of storing a headrest with a simple structure when not in use.

[Means for Solving the Problems]

A vehicle seat device according to the present invention comprises a seat back having a recess for accommodating a headrest formed at an upper end portion thereof, and a headrest supported so as to be retractable in the recess, wherein a protrusion of the headrest is provided. In this state, the lock member that engages the headrest side and the seatback side to prohibit movement of the headrest in the storage direction, and the predetermined movement operation of the headrest in the projecting state other than the storage direction. Accordingly, an operating member for releasing the engagement of the lock member is provided.

[Action]

According to the above configuration, when the headrest that protrudes from the recess of the seat back is used, when a force acts in the direction to store the headrest, the lock member reliably blocks the movement in the storage direction. Will be. In addition, except for the storage direction of the headrest that can be in a protruding state,
For example, when the headrest is unlocked by the lock member by operating the headrest so as to move in a direction in which the headrest is further projected, the headrest can be moved from the projected state to the stored state.

〔Example〕

1 and 2 show an embodiment in which a vehicle seat device according to the present invention is applied to a rear seat. The seat device has a recess 1 for accommodating a headrest at an upper end thereof.
The seat back 2 is formed with a headrest 3, and the headrest 3 is supported in the recess 1 so as to be retractable. A pair of left and right support brackets 4 are installed in the recess 1 of the seat back 2, and a pivot shaft 5 provided at the rear portion of the frame 3a of the headrest 3 is rotatably supported by the support brackets 4. Further, the rotating shaft 5 is provided with a torsion coil spring 7 having one end inserted and fixed to the frame 3a of the headrest 3 and the other end locked to a locking piece 6 provided on the seat back 2. The headrest 3 is biased by the biasing member composed of the torsion coil spring 7 in a direction projecting upward from the recess 1.

When the headrest 3 is rotated about the rotation shaft 5, the headrest 3 is stored in the recess 1 of the seat back 2 as shown by the solid line in FIG. 3 and the recess as shown by the phantom line. It is configured to be displaced from 1 to a state of protruding upward. The headrest 3 is a holding member 8 attached to the support bracket 4 and a holding member attached to a support arm 9 for supporting the headrest 3 in a protruding state.
A stopper 11 composed of 10 resists the biasing force of the biasing member composed of the torsion coil spring 7 so as to be releasably locked in a state of being stored in the recess 1.

The stopper 11 is configured to be locked according to the first pushing operation of the locking member 8 with respect to the holding member 10 and unlocked according to the next pushing operation, and its specific structure. Since it is well known, the description thereof will be omitted, but a holding member 10 having a holding piece is externally fitted to the locking member 8 in accordance with a storing operation of the headrest 3 to be described later, so that both are connected to store the headrest 3 in the above-mentioned manner. It locks in position. When the headrest 3 is further pushed down from the storage position, the holding member 10 is pushed toward the locking member 8 side as described later, and the holding piece of the holding member 10 expands to lock with the holding member 10. The member 8 is separated from the member 8 so that the locked state of the headrest 3 is released.

The support arm 9 has a front end rotatably supported on a side surface of the frame 3a of the headrest 3 by a support pin 12, and a guide pin formed on the support bracket 4 with a connecting pin 13 protruding from the rear end. By being slidably supported along the groove 14, the frame 3a of the headrest 3 and the support bracket 4 are connected. Guide groove 14 above
As shown in FIG. 4, it is formed into a long hole extending in the front and rear of the vehicle body, and a lock portion 15 which is recessed downward is formed at the front end portion thereof. A lock member 16 formed of a heart-shaped cam is rotatably supported by a support pin 17 at a position corresponding to the lock portion 15.

The lock member 16 includes an upper piece 18 that guides the connecting pin 13 to the lock portion 15 of the guide groove 14 when the headrest 3 is operated to project, which will be described later, and the connecting pin 13 to the storage position when the headrest 3 is stored, which will be described later. A lower piece 19 for guiding is provided, and is configured to be rotationally displaced between a locked position and an unlocked position in response to a rocking operation at the protruding position of the headrest 3. That is, the lock member 16 includes the lower piece 19
The lower surface of the upper piece 18 is normally installed at the lock position facing the lock portion 15 of the guide groove 14 by the biasing force of the tension spring 20 installed between the support bracket 4 and the lower side of the support bracket 4 (fourth position). See figure). Then, the upper piece 18 of the lock member 16 is pushed up by the connecting pin 13 in accordance with the ascending operation at the protruding position of the headrest 3, and the lower piece 19 and the lock portion 15 of the guide groove 14 are brought to the unlocked position where they overlap each other. The lock member 16 is rotatably displaced (7th
See figure).

Further, as shown in FIG. 5, the lock member 16 has a ball held in a concave hole 21 formed in a side surface of the upper piece 18.
A holding mechanism 24 is provided, which includes a compression spring 23 that biases the ball 22 outward, and the ball 22 is provided with a compression mechanism 23.
The lock member is fitted into the recess 25 or 26 formed in the wall surface of the support bracket 4 by the urging force of the lock member.
16 is configured to be locked in the lock position or the unlock position. A tension spring 27 is installed between the connecting pin 13 and the lower front portion of the support bracket 4, and the connecting spring 13 is urged downward by the tension spring 27.

In the above structure, when the headrest 3 is moved from the retracted state shown by the solid line in FIG. 3 to the projecting state shown by the phantom line, the headrest 3 in the retracted position is pressed downward to engage the holding member 10 of the stopper 11. By releasing the connection state with the stopper member 8, the headrest 3 is released from the holding state, and the headrest 3 is rotated about the rotating shaft 5 by the urging force of the urging member composed of the torsion coil spring 7. The state shifts to the protruding state shown in FIG.

That is, when the headrest 3 in the storage position shown in FIGS. 3 and 4 is further pushed in the downward direction, the front end of the support arm 9 attached to the frame 3a by the support pin 12 is displaced obliquely rearward. The rear end portion (connecting pin 13) of the support arm 9 is slid rearward along the guide groove 14. As a result, the holding member 10 of the stopper 11 attached to the rear portion of the support arm 9 is pushed to the side of the locking member 8 attached to the bracket 4, and the stopper 11 in the locked state is unlocked. Transition. When the stopper 11 that holds the headrest 3 in the retracted position is released in this way,
The headrest 3 is rotationally displaced in the clockwise direction in the figure by the urging force of the torsion coil spring 7 and shifts to a protruding state described later.

The support arm 9 is rotated according to the rotation of the headrest 3.
The connecting pin 13 provided at the rear end of the rearward member moves forward along the guide groove 14, the connecting pin 13 is guided by the upper piece 18 of the lock member 16 in the lock position, and the tension spring
It is pulled downward by 27 and fitted into the lock portion 15 of the guide groove 14. In this way, the connecting pin 13 is fitted and locked between the upper piece 18 of the lock member 16 and the lock portion 15 of the guide groove 14, whereby the headrest 3 is stabilized by the support arm 9 in a protruding state. Supported.

When the headrest 3 is stored in the recess 1 of the seat back 2 when not in use, as shown by the arrow in FIG. 6, the front end portion of the headrest 3 in the protruding state is further lifted and the headrest 3 is supported by the support pin 12. By raising the front end of the support arm 9 rotatably supported by the frame 3a, the connecting pin 13 projecting from the rear end of the support arm 9 is moved upward in the front part. As a result, as shown in FIG. 7, the upper piece 18 of the lock member 16 is connected to the connecting pin.
It is pushed diagonally upward by 13 and the lock member 16 rotates counterclockwise in the drawing around the support pin 17 as a fulcrum to move to the unlock position.

The lock member 16 is unlocked when the ball 23 of the holding mechanism 24 is fitted into the recess 26 formed on the wall surface of the support bracket 4 so that the lower piece 19 and the lock portion 15 of the guide groove 14 overlap each other. Will be held in position.
When the tip portion of the headrest 3 is pushed down in this state, the connecting pin 13 moves rearward along the upper surface of the lower piece 19 and the guide groove 14, while the headrest 3 shifts to the retracted state.

In addition, as shown in FIG. 8, when the connecting pin 13 moves from the lower piece 19 of the lock member 16 to the guide groove 14, it comes into contact with the tip end portion 19a of the lower piece 19 protruding into the guide groove 14. By pushing this down, the lock member 16 rotates from the unlocked position in the clockwise direction in the drawing and is pulled by the tension spring 20 to move to the locked position shown in FIG. Further, by pushing the headrest 3 into the recess 1 of the seat back 2, the holding member 10 of the stopper 11 and the locking member 8 are connected, and the headrest 3 is stored against the biasing force of the torsion coil spring 7. Held in position.

As described above, the headrest 3 is supported in the recessed portion 1 formed in the upper end portion of the seat back 2 so as to be retractable, and the headrest 3 is stored in the recessed portion 1 when not in use.
In a seat device configured to secure a rear view of a driver, a lock member 16 for locking the headrest 3 in a protruding state is provided, and a moving operation of the headrest 3 in the protruding state in a direction other than the storage direction, that is, a rising operation. Since the support pin 9 of the headrest 3 is provided with the connecting pin 13 serving as an operating member that displaces the lock member 16 from the locked position to the unlocked position according to an operation or the like, a separate operation for releasing the locked state of the headrest 3 Without providing a lever or the like, it is possible to release the locked state of the headrest 3 in the projecting state and shift it to the stored state by a simple operation. Therefore, it is possible to prevent the appearance and comfortability from being deteriorated by installing the operation lever in a conspicuous position, and the operability from being deteriorated by installing the operation lever in a position away from the headrest 3.

Further, when the headrest 3 is used, the lock member 16 is configured to prohibit the movement of the headrest 3 in the storing direction. Therefore, even when a large force acts in the direction in which the headrest 3 is stored, such as when a vehicle collides, It is possible to reliably prevent the situation in which the headrest 3 unintentionally moves from the protruding state to the storage direction.

Further, in the above embodiment, the headrest 3 is supported so as to be retractable in the recess 1 formed in the upper end of the seat back 2,
In a seat device configured to store the headrest 3 in the recess 1 when not in use, so as to secure the rear view of the driver, a stopper for releasably locking the headrest 3 in the storage position and a headrest. Since a biasing member such as a torsion coil spring 7 for biasing the headrest 3 in the projecting direction is provided, the headrest 3 is automatically projected by the biasing member only by releasing the locked state of the headrest 3 by the stopper 11. Can be moved to position.

The seat device according to the present invention is not limited to the rear seat,
It can also be applied to the front seats.

[Effect of device]

As described above, according to the present invention, in the seat device configured to store the headrest in the recess formed in the upper portion of the seatback when not in use, the locking member locks the headrest in the protruding state, and the locking member in the protruding state. A separate operating lever for releasing the locked state of the headrest is provided because an operating member that displaces the lock member from the locked position to the unlocked position in response to a movement operation of the certain headrest in a direction other than the storage direction, that is, a rising operation, etc. It is possible to shift the protruding headrest to the retracted state in which it is pushed into the recess by a simple operation without providing the above. Therefore, the appearance and habitability are deteriorated as in the case where the operation lever is installed in a prominent position near the headrest, or the operability is reduced as in the case where the operation lever is installed in a position away from the headrest. There is an advantage that it can be prevented.

In addition, since the movement of the headrest in the storing direction is prohibited by the lock member, even when a large force acts in the direction for storing the headrest in the case of a collision of an automobile, the headrest is unintentionally protruded from the protruding state. It is possible to reliably prevent the situation of moving in the storage direction and effectively protect the head of the occupant.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of an embodiment of a vehicle seat device according to the present invention, FIG. 2 is an overall perspective view of the seat device, and FIGS. 3 and 4 show a retracted state of a headrest, respectively. A side sectional view, FIG. 5 is a sectional view taken along line VV of FIG. 3, FIG. 6 is a side sectional view showing a protruding state of the headrest, and FIG. 7 is a side sectional view showing an unlocked state of the headrest. The figure is a side cross-sectional view showing a storing operation process of the headrest. 1 ... Recessed portion, 2 ... Seat back, 3 ... Headrest, 13 ...
Actuating member (connecting pin), 16 ... Lock member.

Claims (1)

[Scope of utility model registration request] 1. A seat apparatus for an automobile, comprising: a seat back having a recess for accommodating a headrest formed at an upper end thereof; and a headrest supported in the recess so that the headrest can be protruded and retracted. Side and the seat back side are engaged to prevent the headrest from moving in the storage direction, and the lock is performed according to a predetermined movement operation of the headrest in a protruding state other than the storage direction. A seat device for an automobile, comprising: an actuating member for releasing engagement of the members.