JPH0220098Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a vehicle seat in which the seat back can be adjusted in inclination using a reclining device, and in particular, the inclination of the headrest can be changed in conjunction with the tilting movement of the seat back. This is how it was done.

[Conventional technology]

A so-called reclining seat that adjusts the inclination of the seat back using a reclining device adjusts the angle between the seat back and the seat cushion. There is a problem that gaps are created between the two, making the support unnatural and increasing fatigue.

To solve this problem, a reclining vehicle seat has been proposed in which a headrest is raised and lowered in conjunction with the tilting of the seat back.

By the way, as for the above-mentioned reclining seat, as shown in FIG. 6, as shown in FIG.
A pillow body 54 is fixed to the upper end with a pin 55 so that it can be raised and lowered freely, and a rope 56 of a certain length is attached to the side plate 5 along the backrest 53.
The rope 56 is hung on a pulley 58 mounted on the shaft 57 of the second rope, and one end of this rope 56 is guided to the pillow body 54.
The rope 56 is tied to a protruding piece 59 formed on the support stile 54a and the other end is fixed to the side plate 52 of the chair body 51, so that as the backrest 53 is tilted backward, the rope 56 becomes tensed and the pillow body 54 is gradually erected. has been proposed.

[Problem that the invention attempts to solve]

This reclining seat uses a rope to pull the pillow body as the seatback tilts and rotates, so the load applied to the pillow body is supported by the traction force of the rope, so the rope is required to have great strength, and the rope is always kept under tension. Since the pillow body is stretched, it is impossible to adjust the inclination of the pillow body with respect to the backrest, and there is a problem that it is impossible to adjust the pillow body to a shape that matches the physique or preference of the seated person.

The present invention was developed in view of this point, and the headrest, which is attached to a seat bag that is adjusted to tilt backwards, changes its angle as the seat bag tilts backwards, and also makes it possible to adjust the inclination with respect to the seat bag. The purpose is to provide seats for vehicles.

[Means for solving problems]

The present invention is based on the slide rail 5 as a base member.
A headrest 4 is provided on the upper part of the seat bag 2, which is rotatably pivoted in the front-rear direction and whose inclination can be adjusted by a reclining device 6. A locking device 29 that pivots and biases the headrest 4 forward and locks it at a desired position.
The locking device 29 is unlocked simultaneously with the reclining operation of the reclining device 6, and the control wire 34 is engaged with the headrest 4 to prevent the headrest 4 from rotating forwardly. The traction force is weakened and loosened as the tension seat bag 2 tilts backward.

[Effect]

With this configuration, seat bag 2
When the headrest 4 is tilted backward by the reclining device 6, the locking device 29 is simultaneously unlocked and the control wire 34 relative to the headrest 4 is loosened, so that the headrest 4 is moved forward by the biasing force of the locking device 6. 34 is rotated by the amount of slack in the seat back 2, and is tilted forward relative to the seat back 2.
That is, even if the inclination angle of the seat back 2 changes with respect to the slide rail 5 as a base member, the headrest 4 is maintained in a substantially vertical position, the neck is supported in a vertical position, and the target direction of the seated person is maintained constant.

Further, with the headrest 4 unlocked, it is possible to tilt the headrest 4 rearward and return the headrest 4 to its original position, that is, it can be set arbitrarily between a forward tilted position and a substantially vertical position.

〔Example〕

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

First, the first embodiment will be explained with reference to FIGS. 1 to 4. In the figures, 1 indicates a vehicle seat, particularly a front seat of a passenger car, 2 indicates a seat back,
3 is a seat cushion, and a headrest 4 is provided on the upper surface side of the seat bag 2.

The seat back 2 serves as a base member and is tiltable with respect to a slide rail 5 by a reclining device 6, and the seat cushion 3 is tilted against the slide rail 5 as the seat back 2 is tilted rearward.
It is designed to be moved forward relative to the
The headrest 4 is rotatable in the longitudinal direction relative to the seat bag 2.

That is, the back frame 11 of the seat bag 2 has substantially doglegged hinge brackets 12a, 12b fixedly protruding downward from the lower end portions on both sides thereof, and the upper rails 5a, 5a of the slide rail 5 at the bent central portions of the hinge brackets 12a, 12b. 5
Brackets 13a, 13b fixed to the rear of b
The cushion frame 15 of the seat cushion 3
has shaft pins 16a, 16 laterally at the rear ends on both sides.
axle pins 14a, 14b with protruding parts b for pivotally connecting the back frame 11 to the brackets 13a, 13b;
The back frame 1 is inserted through arc-shaped guide holes 17a and 17b formed below the center.
The hinge brackets 18a, 18 are inserted into the shaft holes at the lower ends of the hinge brackets 12a, 12b of the cushion frame 15, and are pivotally attached to the hinge brackets 18a, 18.
b is provided in a protruding manner, and is connected to brackets 19a, 19b protruding from the front portions of the upper rails 5a, 5b by links 20a, 20b, and both links 20a, 20b are connected by a rod 20c. be.

Furthermore, brackets 21a and 21b are provided opposite to each other on the upper side of the back frame 11, and a support member 22 of the headrest 4 is pivotally supported.
Reference numeral 2 denotes a shaft portion 2 located parallel to the shaft supports 22a and 22b that are pivotally supported by the brackets 21a and 21b.
A supporting piece 22d is vertically fixed to the center of the shaft 22c, and both ends of the shaft 22c are bent to form the engaging part 2.
2e and 22f. That is, this support member 22 has support portions 22a, 22 when viewed from the lateral direction.
b, the shaft portion 22c and the engaging portions 22e, 22f are located at the upper end, bent portion, and rear end of the approximately L-shape.

A head rest frame 23 is fixed to the support piece 22d of the support member 22.

In this way, the back frame 11 is rotatably supported on the slide rail 5 as a base member, and the cushion frame 15 is supported so as to be movable in the front and back direction while connected to the back frame 11. The headrest frame 23 is pivotally supported by the back frame 11 so as to be rotatable in the front-rear direction.

The rear end of the cushion frame 15, that is, the inner end of one of the shaft pins 16a and the slide rail 5
A friction lock device 25 having an elongation biasing force is interposed between a rod-shaped arm 24 fixed to one of the upper rails 5a, and
The reclining device 6 is constructed by pivoting a handle 26 to the rear bracket 13a so as to be movable up and down, and extending an operating wire 27 between the handle 26 and the unlocking portion 25a of the friction locking device 25. ing.

Further, an arm 28 is provided protruding inside one side of the back frame 11, and a friction lock device 29 having an extension biasing force is provided between the arm 28 and one engaging portion 22e of the headrest support member 22 described above. This release operation part 29a and the above-mentioned handle 2 are interposed.
A headrest operating device 31 is constructed by extending an operating wire 30 between the headrest operating device 6 and the operating wire 30 .

The rod 20c that connects the links 20a and 20b has a tip that connects the links 20a and 20b.
An engagement piece 32 extending from the shaft support on the slide rail 5 of b is fixed, and an engagement pin 33 is provided protruding from the tip of this engagement piece 32, and this engagement pin 33 is engaged with the other of the above-mentioned headrest support members 22. A control wire 34 is stretched between the control wire 34 and the headrest support member 22, and a ring 3 having a long hole 35a is provided at the end of the control wire 34 on the headrest support member 22 side.
5 is attached and movably engaged with the engagement portion 22f of the support member 22 via the ring 35.

A spring 36 is stretched between the handle 26 and the bracket 13a so that the handle 26 is always biased downward. 37 in the diagram is seat cushion 3
This is a cover that covers the sides of the

The operation of the vehicle seat of this example configured as described above will be explained.

First, when the handle 26 is pulled up against the biasing force of the spring 36 to perform a reclining operation, the friction lock devices 25 and 29 are unlocked via the operating wires 27 and 30. This unlocking operation of the friction lock device 25 allows the seat cushion 3 to move forward, pushing the seat back 2 backwards and tilting it. Along with this tilting, the seat cushion 3 is moved forward and the seat back 2 A reclining motion is performed. That is, the back frame 11 is engaged with the rear end of the cushion frame 15 at a portion extending from its shaft support, and the cushion frame 15 is engaged with the slide rail 5 at the front portion.
Link 20a to the upper frames 5a and 5b of
20b, when the back frame 11 is tilted rearward, the cushion frame 15 is pushed forward, and by the rotation of the links 20a and 20b, the cushion frame 15 is tilted and moved forward so that the front part becomes higher. .

As the links 20a and 20b rotate due to the forward movement of the cushion frame 15, the engagement piece 32 connected to the link through the rod 21 is rotated integrally, and the tip thereof moves rearward. As a result, the control wire 34 stretched between this tip and the headrest support member 22 becomes loose, while the friction lock interposed between the back frame 11 and the headrest support member 22 loosens. Due to the unlocking operation of the device 29, the headrest support member 22 is rotated forward about the shaft supports 22a and 22b relative to the back frame 11 due to the extension biasing force of this device 29, so that the headrest 4 is directed downward relative to the seat back 2. In other words, the headrest 4 is positioned in a substantially vertical direction as the seat bag 2 is tilted backward.

In addition, in this state, the headrest support member 22 is connected to the elongated hole 35 of the ring 35 of the control wire 34.
It can be rotated within the range a, and the inclination of the headrest 4 can be adjusted.

In this way, when the seat back 2 is tilted backward, the headrest 4 is tilted forward in conjunction with the rearward tilt, and independently of the backward tilt, the headrest 4 can be tilted back and forth, that is, can be swung, and the seat back 2 can be tilted backward at a desired angle. The headrest 4 can be adjusted to the position of the seated person's neck (see FIG. 4).

When the handle 26 is lifted up in this state, the friction lock devices 25 and 29 are locked, and the seat bag 2 and seat cushion 3 are fixed at the desired inclination and movement position, and the headrest 4 is also fixed at the desired angle. become.

To return to the original position from this state, pull up the handle 26 again to release the locks on the friction lock devices 25 and 29 without applying any rearward load to the seat back 2, and the seat cushion 3 and upper rail 5a will be released. During this time, the elongated biasing force of the friction lock device 25 acts to move the seat cushion 3 rearward, and accordingly, the seat back 2 is rotated forward and returns to its original position, and the headrest 4 is moved back from the seat cushion 3. The control wire 34 is pulled through the engagement piece 32 by the rotation of the links 20a and 20b due to the rearward movement of the headrest support member 22, and the headrest support member 22 is returned to the same direction as the seatback 2. Ru.

Next, another embodiment of the present invention will be described with reference to FIG.

In this example, the seat 1 is configured such that the seat back 2 is not related to the seat cushion 3 and the tilt can be adjusted.
The headrest 4 is directly linked to the seat back 2 so that it can be tilted.

That is, in this embodiment, a headrest support member 22 is attached to the upper part of the back frame 11 so as to be rotatable in the front and back direction as in the above-mentioned first embodiment, and is locked by a friction locking device 29. It is rotated forward by the extension biasing force,
This friction locking device 29 is also unlocked by pulling up the handle of the reclining device. Further, the headrest support member 22 and the extended end of the support portion of the back frame 11, that is, the lower end of one hinge bracket 12a, are connected by a control wire 41, and the headrest support member 22 is pulled so as to rotate rearward. It's on. When the control wire 41 is loosened and the friction lock device 29 is unlocked, the extension biasing force causes the control wire 41 to rotate forward.

Note that the same members as those shown in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

To explain the operation of the seat according to the present embodiment, which is constructed in this way, when the seat back is tilted by operating the handle using the reclining device, the control wire 4 connects the support member 22 of the headrest and the lower end of the hinge bracket 12a of the seat back 2.
1 is loosened by the rotation of the lower end of the hinge bracket 12a of the seat bag 2, and the friction locking device 29 is also unlocked, so that the headrest is loosened by the elongation biasing force of the locking device 29 by the amount that the control wire 41 is loosened. rotated forward. Furthermore, since the control wire 41 is engaged with the headrest support member 22 through the elongated hole 42a of the link 42, the headrest 4 can be locked by releasing the lock of the friction locking device 29, thereby locking the ring 4.
Even if the seat back 2 is in the tilted position, it can be returned to the original position.

In this example, the seat cushion may be configured to tilt forward and move in conjunction with the tilting of the seat back, as in the first embodiment described above, or the seat cushion may be configured to slide forward without being associated with the seat back. It may be fixed to the upper rails 5a, 5b of the rail 5 so that only the seat back 2 can be tilted.

[Effect of idea]

As described above, according to the present invention, the headrest can be rotated forward in conjunction with the adjustment operation of the rearward tilting angle of the seatback, and can also be rotated within a certain angle range at the tilted position of the seatback. The headrest can be reliably set to a position that suits the occupant's physique or preference regardless of the tilted position of the seatback, and especially in the driver's seat, the head rest can be set to a position that suits the seatback's tilted position so that the driver's eyes can be directed in a predetermined direction. It has the effect of supporting the driver and making driving more comfortable.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of a frame of an example of a vehicle seat according to the present invention, Fig. 2 is a side view of a vehicle seat incorporating the frame, Fig. 3 is an exploded perspective view of the frame, and Fig. 4 is a side view of a frame of an example of a vehicle seat according to the present invention. FIG. 5 is a side cross-sectional view of a part of the frame for explaining the operation, FIG. 5 is a vertical side view of another example of the frame of the vehicle seat according to the present invention, and FIG. 6 is a side view of a conventional vehicle seat. In the figure, 2 is a seat bag, 3 is a seat cushion, 4 is a headrest, 6 is a reclining device, 11 is a back frame, 22 is a headrest support member, 29 is a locking device, and 34 and 41 are control wires.

Claims (1)

[Scope of utility model registration request] In a vehicle seat in which the seatback is adjusted in inclination using a reclining device, a headrest is provided at the top of the seatback so as to be rotatable in the front-rear direction, and is locked by a locking device in a state where it is always pivoted forward, and the headrest is A control wire whose traction force is loosened as the seat back tilts backward is connected to the lock device, and the locking device is unlocked in conjunction with the reclining motion of the seat back, and the headrest is connected to the control wire that loosens the traction force as the seat back tilts. A vehicle seat characterized in that the seat can be rotated in the longitudinal direction within a loosening range.