JPH0111101Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side support adjustment device for a seat used, for example, in the front seat of an automobile.

BACKGROUND ART In vehicle seats such as automobiles, a bulge called a side support is sometimes provided on the backrest for the purpose of improving the so-called holdability. Figure 1 shows an example of a front seat of a car.
2 indicates a seat portion, and 2 indicates a backrest, and side supports 3, 3 are integrally formed on both left and right sides of this backrest 2.

Generally, side supports 3 and 3 are fixed, but
Some vehicles are also equipped with a device that allows the opening angle of the side supports 3, 3 to be adjusted.
That is, the conventional side support adjustment device has a pair of side support frames located on the left and right sides of the backrest frame in the backrest 2 and pivoted so that the opening angles of these side support frames can be changed. Adjustments are made using a screw mechanism. Therefore, the screw must be rotated for adjustment, which takes time and effort, and the position of the operator for operating the screw mechanism is determined uniquely depending on the position of the screw mechanism, making it difficult to operate the operator. It has drawbacks such as not being able to be installed in a free position and poor operability.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to provide a seat that allows the opening angle to be adjusted quickly with simple operations, and that allows the operator to be placed in a relatively free position. side support adjustment device.

That is, the present invention includes a backrest frame, a pair of side support frames located on both sides of the backrest frame and pivotally connected to each other so that the mutual opening angles can be changed, and both ends of which are connected to the side support frames. A connecting link that rotates the side support frames in synchronization with each other, and a connecting link that is supported by the member on the side of the backrest frame and is movable through the connecting link in the axial direction, and when locked, the connecting link can be moved to any axial position. This side support adjustment device for a seat is equipped with a friction lock mechanism incorporating a friction member to be fixed to the seat, and an operator for unlocking the friction member.

According to the present invention having the above structure, the coupling link is unlocked by moving the friction member via the operator, and the side support frame interlocked therewith becomes rotatable. Therefore, after adjusting the side support frame to a desired opening angle, if the operator is returned to its original position, the connecting link is locked again and the side support frame can be fixed.

Therefore, the side support can be adjusted easily and quickly with a single touch, and the friction member can be operated remotely via a cable such as a Bowden wire. It becomes possible to provide it at a desired position away from the friction lock mechanism, that is, at a position where it is easy to operate. Therefore, it is possible to provide a side support adjustment device that is easy to use and has excellent operability.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, numeral 5 indicates a backrest frame. This backrest frame 5 may be similar to a conventional one. A pair of side support frames 6, 6 are provided on both left and right sides of the backrest frame 5. Each side support frame 6, 6 is obtained by bending and forming a thick steel wire that can be elastically deformed to some extent. and upper ends 6a, 6a of the side support frames 6, 6;
are rotatably pivotally connected to upper brackets 7, 7 fixed to the backrest frame 5, and lower end portions 6b, 6b are rotatably pivotally connected to lower brackets 8, 8. Therefore, the opening angles of the side support frames 6, 6 can be changed.

End portions 10a and 10b of the connecting link 10 are rotatably attached to the lower portions of the side support frames 6 and 6, respectively. More specifically, one end 10a located on the left side in the figure is pivoted at a position forward of the pivot joint 11 of one side support frame 6, and the other end 10a located on the right side in the figure
0b is pivoted at a position rearward of the pivot portion 12 of the other side support frame 6.

Therefore, the connecting link 10 is indicated by the arrow A in FIG.
As you move in the direction, the opening angle of each side support frame 6,6 widens as shown by the imaginary line,
Conversely, when they move in the direction of arrow B, they rotate in synchronization with each other so that the opening angle narrows.

A friction lock mechanism 15 is provided in the middle of the connecting link 10. This friction lock mechanism 15 includes an outer cylinder 16 into which the connecting link 10 is inserted movably in the axial direction thereof, and a coil spring as an example of a friction member wound around the outer side of the connecting link 10 inside the outer cylinder 16. 17. The coil spring 17 has a dimensional relationship such that the inner diameter of the coil in a free state is smaller than the outer diameter of the connecting link 10, and its winding force can frictionally engage and fix the connecting link 10. There is. One end of the coil spring 17 is locked to the outer cylinder 16 side, and the other end is locked to the lock release lever 18. This lock release lever 18 can be rotated concentrically with the outer cylinder 16, and when it is pulled upward in FIG. 3, the coil spring 17 is twisted in its unwinding direction and the inner diameter of the coil is expanded. , is configured to release the engagement with the connecting link 10.

A locking portion 16a is protruded from a part of the outer cylinder 16, and the locking portion 16a is connected to the locking hole 2 of the bracket 20 fixed to the backrest frame 5.
1 is fitted. This locking hole 21 is made larger than the thickness of the locking part 16a so that it prevents the locking part 16a from moving in the lateral direction, but allows it to move to some extent in the front-rear direction (in the direction of arrow C in FIG. 3). It is formed to be able to absorb the movement of the connecting link 10 in the front-rear direction.

One end of a core wire 23 of a Bowden wire 22 is connected to the lock release lever 18 as an example of a cable for remotely controlling the lock release lever 18. The core wire 23 is movably inserted through a flexible tube 24, and the other end of the core wire 23 is connected to an operator 25. By operating this operator 25 and pulling the core wire 23,
The lock release lever 18 can be rotated. The operator 25 is placed at a position where it can be easily operated, for example, so as to protrude to the side of the seat.

The backrest frame 5 equipped with the side support adjustment device is attached to a seat frame (not shown), and a spring structure, pads, outer fabric, etc. are attached to the outside of the backrest frame 5 to form a seat as shown in FIG. Side support frames 6, 6 are located inside the side supports 3, 3.

Therefore, by operating the operator 25 and driving the lock release lever 18 to release the lock on the connecting link 10, the opening angle of the side supports 3, 3, that is, the side support frames 6, 6 can be adjusted steplessly by hand. be able to. After adjusting the opening angle to the desired opening angle, when you release your hand from the operator 25, the lock release lever 18 returns to its original state due to the elastic restoring force of the coil spring 17 as a friction member or the elastic force of the return auxiliary spring. Since it returns to its position and becomes locked again, the connecting link 10 is fixed, and therefore the side support frames 6, 6 are also fixed.

As can be seen from the above description, according to this embodiment, by releasing the lock using the operator 25, the opening angle of the side supports 3, 3 can be adjusted easily and quickly. And 10 connecting links
The combination of this and the friction lock mechanism 15 allows the opening angle to be adjusted steplessly. Further, since the lock release lever 18 can be remotely operated by the operator 25 via a flexible cable such as a freely routed Bowden wire 22, the operator 25 can be placed at a convenient position for operation. This makes it possible to further improve operability.

In implementing the present invention, the specific aspects such as the shape and structure of the backrest frame, side support frame, connecting links, friction lock mechanism, operating elements, etc. may be modified in various ways without departing from the gist of the present invention. Needless to say, it can be implemented.

As described above, according to the present invention, it is possible to provide a side support adjustment device with excellent operability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a seat, Fig. 2 is a perspective view of a side support adjustment device showing an embodiment of the present invention, Fig. 3 is a perspective view of the friction lock mechanism in Fig. 2, and Fig. 4 2 is a sectional view taken along the - line in FIG. 2. FIG. 5...Backrest frame, 6...Side support frame, 10...Connection link, 10a, 10b
... End portion, 15 ... Friction lock mechanism, 17 ... Coil spring (friction member), 21 ... Detent hole, 2
2... Bowden wire (cable), 23... core wire, 24... tube, 25... operator.

Claims (1)

[Scope of utility model registration request] A backrest frame, a pair of side support frames located on both sides of this backrest frame and pivotally connected to each other so that their opening angles can be changed; both ends of the frame are connected to the side support frame side, and these side support frames are synchronized with each other. and a friction member supported by the backrest frame side member and movably inserted into the connecting link in the axial direction and fixing the connecting link at an arbitrary axial position when locked. 1. A side support adjustment device for a seat, comprising: a friction lock mechanism incorporating a friction member; and an operator for unlocking the friction member.