JPS61109507A - Seat back revolving operation apparatus of car seat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a seat back rotation operating device for an automobile seat that allows easy operation for rotating the seat back.

(Prior Art) An automobile seat is constructed, for example, as follows. That is, the seat back is pivotally supported on the rear end of a seat cushion mounted on the vehicle interior floor so as to be rotatable back and forth. A reclining device that can rotate the seat back and hold it at a desired angle of inclination is provided at a pivot point between the seat cushion and the seat back (for example, see Japanese Utility Model Publication No. 148537/1983).

(Problems to be Solved by the Invention) By the way, for example, during a nap, the seat back is rotated backward until it assumes a substantially horizontal position, thereby flattening the surface of the seat on the seating side. In this case, the operator may operate the reclining device from behind the seat to rotate the seat back. However, in this case, the operator needs to continue operating the reclining device while avoiding interference with the seatback that rotates backwards, and this operation is extremely complicated in a vehicle with a small work space. .

(Purpose of the Invention) This invention was made with attention to the above-mentioned circumstances, and when the seat back is rotated backwards to bring it into a nearly horizontal position, this operation can be performed even from the rear of the seat. It is an object of the present invention to make this operation easy and to simply configure a means for facilitating this operation.

(Structure of the Invention) A feature of the present invention for achieving the above object is that an operating lever pivotally supported at the rear end of the seat cushion is rotated, and the posture of the operating lever after rotation is During this time, the seatback is allowed to rotate backwards, and in conjunction with the rotation of the seatback to a nearly horizontal position, the hold on the operating lever is released, and the seat hack maintains this position. It's at the point of saberu.

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

Reference numeral 1 denotes a car seat, and this seat 1 is provided on a floor 2 of a vehicle interior.

Seat 1 above is the seat, cushion 3 and seat back 4
The seat back 4 is pivotally supported at the rear end of the seat cushion 3 so as to be rotatable back and forth. That is, bracket plates 6 are attached to both rear sides of the seat cushion 3, respectively. On the other hand, lower arms 7 are provided protruding from both sides of the lower part of the seat par 2 and 4, respectively. And lower arm 7
is pivoted to the bracket plate 6 via a pivot shaft 8 so as to be rotatable back and forth.

Further, the seat 1 has a reclining device 10 that allows the seat back 4 to be rotated and held at a desired inclination angle.

To explain the reclining device IO, a large number of engagement teeth 11 are formed at the lower end of the lower arm 7 along the circumferential direction of the pivot shaft 8. On the other hand, a reclining lever 12 is rotatably supported on the bracket plate 6. Moreover, the above-mentioned reclining lever 12 is attached to the above-mentioned bracket plate 6.
An engagement arm 14 connected to the cam means 13 is rotatably supported, and at the pivot end of the engagement arm 14,
By this rotation of the engagement arm 14, engagement teeth 15 that engage with the engagement teeth 11 are formed.

Then, when the reclining lever 12 is rotated upward, the engagement arm 14 is rotated forward via the cam means 13, and the engagement between the two engagement teeth 11 and 15 is released, thereby allowing the seat back 4 to move freely. rotation is allowed (as shown by phantom lines in each figure).

On the other hand, when the reclining lever / is prevented from rotating, and the seat back 4 is held at the inclined angle (as shown by solid lines in each figure).In the above case, although not shown, the reclining lever 12 is biased by a spring in the direction of downward rotation. , reclining lever 12
When not in operation, both engaging teeth 11.15 elastically engage with each other, and rotation of the seat back 4 is prevented.

Further, in the above configuration, the seat 1 is configured so that the seat back 4 can be easily rotated from the rear of the seat 1 to a substantially horizontal position and the seat back 4 can be held in this state.

This configuration will be explained below.

In particular, in FIGS. 1 and 3, an operating lever 17 is rotatably supported on the rear end of the seat cushion 3, and the lower rotating end of the operating lever 17 is an operating portion 18;
The upper rotating end of the operating lever 17 is interlocked with the reclining lever 12 by a connecting rod 19. Although not shown, the operating lever 17 is biased by a spring so that its operating portion 18 rotates forward. When the operating portion 18 of the operating lever 17 is rotated forward, the reclining breather 12 is connected via the connecting rod 19.
rotates downward, and both engaging teeth 11.15 engage with each other to prevent rotation of the seat back 4 (shown by solid lines in the figure).

On the other hand, if the operating portion 18 of the operating lever 17 is rotated rearward, the reclining lever 12 is rotated upward via the connecting rod 19, thereby engaging both it t and
15 is released, and the seat back 4 is allowed to rotate freely (as shown by solid lines in the figure).

When the operating portion 18 of the operating lever 17 is rotated backward as described above, a holding means 21 is provided to maintain the posture of the operating lever 17 after the rearward rotation. This holding means 21 is constructed as follows.

That is, a locking pawl 22 that rotates together with the operating lever 17 is provided. On the other hand, a bell crank lever 23 is rotatably supported on the bracket plate 6. The locking portion 24 on one end side of the bell crank lever 23 is biased in the direction of engagement with the locking pawl 22 by a spring (not shown). Then, when the operating portion 18 of the operating lever 17 is rotated backward, both engaging teeth 1
1.15 are disengaged from each other, the locking portion 24 engages with the locking pawl 22, and the forward rotation of the operating portion 18 of /<-17 is prevented. As a result, the posture of the operating lever 17 after the rearward rotation is maintained, and the operation of the operating lever 17 is no longer necessary and the seatback 4 is
Free rotation is allowed (as shown by phantom lines in the figure).

Further, when the seat back 4 is rotated backward until it assumes a horizontal position, the operation lever 17 is rotated in conjunction with this rotation.
release means 26 for releasing the holding of the holding means 21 against the
is provided.

That is, the release means 26 has an engagement pin 27 projecting from the lower arm 7, and when the seatback 4 is rotated to a substantially horizontal position (as shown by the imaginary line in the figure), the engagement pin 27 is Push the other end of the bell crank lever 23 (arrow A in the figure) to disengage the locking portion 24 from the locking pawl 22 (arrow B in the figure). As a result, the operating lever 17 and the reclining lever 12 elastically rotate and return to their original positions. As a result, both the engaging teeth 11.15 engage with each other again, and the seat back 4 is automatically held in the above-mentioned horizontal position.

In particular, in FIG. 2, if the locking portion 24 is not engaged with the locking pawl 22, even if the reclining lever 12 is rotated, the rotation of the reclining lever 12 will be limited to the operation lever 17. The reclining lever 12 and the connecting rod 19 are connected in the following manner so that the reclining lever 12 and the connecting rod 19 are not transmitted.

That is, a long hole 28 extending back and forth is provided at the front end of the connecting rod 19.
is formed. On the other hand, a connecting pin 29 that is slidably fitted into the elongated hole 28 is provided on the reclining lever 12 in a protruding manner. If the operating part 18 of the operating lever 17 is rotating forward because the locking part 24 is not engaged with the locking pawl 22, the connecting pin 29 is inserted into the elongated hole when the reclining lever 12 is rotated. The connecting pin 29 simply slides back and forth within the connecting rod 28 (arrow C in the figure), so the connecting pin 29 does not rotate the operating lever 17 via the connecting rod 19.

(Effects of the Invention) According to the present invention, by rotating the control lever pivotally supported on the rear end of the seat cushion, the posture of the control lever after rotation is maintained, and during this period, the position of the control lever is maintained at the rear of the seat back. The rotation of the seatback is allowed, and in conjunction with the rotation of the seatback to an almost horizontal position, the hold on the control lever is released and the seatback is held in that position, so the seatback cannot be rotated backwards. If you want to bring the seat back to a nearly horizontal position, first operate the control lever and rotate the lever, then release the control lever and rotate the seatback backwards.
Next, the seat back may be brought into a substantially horizontal position, and at this time, the seat back is automatically held in that position.

Therefore, it is not necessary to operate the operating lever while rotating the seat back backwards and when holding the seat back in an almost horizontal position. In this case, it is sufficient to operate the operating lever only to start rotating the seatback, and this operation can be easily performed even from behind the seat.

In addition, in the above case, allowing the seat hack to rotate backwards,
In addition, since an existing reclining device can be used to maintain this in a substantially horizontal position, this can be easily constructed.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, with Fig. 1 being an overall side view of the seat, and Fig. 2 mainly showing the reclining device. ! FIG. 3 is a partially enlarged view of FIG. 1. 1. e-seat, 211. cabin floor, 3.. seat cushion, 4.. seat back, 12.. reclining lever, 17. fist operation lever, 21.. holding means, 26
...Cancellation means.

Claims (1)

[Claims] 1. The seat back is pivoted to the rear end of the seat cushion on the vehicle interior floor so that it can rotate freely back and forth, and a reclining lever is installed on the seat cushion to allow the seat back to rotate or to hold it at a desired angle of inclination. In the seatback rotation operation device for an automobile seat, the operation lever is rotatably supported on the rear end of the seat cushion, and as the operation lever is rotated, the reclining lever is rotated. The operating lever and the reclining lever are connected to each other so that the seatback rotates in a direction that allows the seatback to rotate, while a holding means is provided to maintain the position of the operating lever after rotation, and the seatback is held approximately horizontally. A seat back rotation operating device for an automobile seat, characterized in that a release means is provided for releasing the holding means from the holding means relative to the operating lever in conjunction with rearward rotation to the posture.