JPH042302Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Present Invention) The present invention relates to a spring coupler, and more specifically, it is used to provide a spring coupler without backlash.

(Prior art and its problems) For example, as shown in FIG. 4, an automobile window glass has a lift arm 3 assembled in an X shape into a guide groove of a lift arm bracket 2 fixed to the lower part of a window glass 1. One end of the synchronizing arm 4 is slidably attached to the other end of the lift arm 3, and the sector gear 5 is attached to the other end of the lift arm 3.
It has a structure in which the synchronizing arm 4 is fixed and the other end of the synchronizing arm 4 is slidably attached to the guide groove of the arm bracket 6 on the door side. The sector gear 5 meshes with a gear 7 fixed to a driven member of a spring coupler that is interlocked with the rotating shaft of a manual or electric motor, and the rotation of the gear 7 rotates the lift arm 3 about a fulcrum 8. The window glass 1 is raised and lowered.

On the other hand, a guide rail 9 is fixed to the door side of the window glass 1, and guide rollers 10 fixed to both sides of the window glass 1 are slidably fitted into the guide rail 9, and the lift arm The movement of the window glass 1 by the guide rollers 10 is guided by the guide rollers 10 so that the movement of the window glass 1 follows a constant trajectory.

As shown in FIGS. 5 and 6, the spring coupler used in the window glass opening/closing mechanism described above has a drive member 14 having a notch 13 disposed inside a case 12 supported by a fixing member 11. The projection 16 of the driven member 15 is disposed with a gap in the notch 13 formed in the driving member 14, and the case 12 and the driving member 14 are joined to the inner wall of the case 12 with frictional force. A spring 17 is provided. A shaft 19 connected to an operating means 18 such as a handle or a lever is fixed to the driving member 14, and when the operating means 18 rotates the driving member 14 counterclockwise, the end surface of the notch 13 of the driving member 14 It engages with one end 17a of the spring 17, and when rotated clockwise, the other end surface of the notch 13 engages with the other end 17b of the spring 17.
As the driving member 14 rotates, the spring 17 engages with the driving member 14 and contracts, and the connection between the spring 17 and the inner wall of the case 12 is released.
After that, the notch 13 is connected to the protrusion 16 and the spring 1.
7 and the driven member 15 is rotated by the driving member 14.

On the other hand, no matter which direction the driven member 15 rotates, the protrusion 16 of the driven member 15 moves toward the spring 17.
The spring 17 is expanded and the frictional force between the spring 17 and the inner wall of the case 12 is increased, thereby preventing the driven member 15 from rotating. The follower member 15 is thus held in place. As previously mentioned, the spring coupler constitutes a two-way clutch.

That is, by fixing the gear 7 to the driven member 15 and meshing the gear 7 with the sector gear 6, when the rotational force from the handle 18 or the electric motor is applied to the shaft 19, the driving member 14 rotates, and the spring 1
7 in the tightening direction, and this rotational force is transmitted to the sector gear 5 via the driven member 15 and the gear 7, allowing the window glass 1 to be opened and closed. on the other hand,
When an external force is applied to the window glass 1 and this external force is transmitted to the driven member 15 via the sector gear 5 and the gear 7, the driven member 15 moves the spring 17 in the unwinding direction, causing the spring 17 to move inside the case 12. Presses against the surrounding surface and prevents the window glass from moving up and down due to external force.

Spring couplers are often used not only in the window glass opening/closing mechanism shown, but also in seat reclining mechanisms, headrest mechanisms, and the like.

By the way, as is clear from FIG. 6, a play C is provided in order to apply rotational force to the shaft 19 and release the frictional force of the spring 17 against the case 12. In this range of play C, the shaft 19 can rotate freely, and the handle 18 moves slightly freely when driving on a rough road or when opening/closing a door, which is not only unsightly, but also causes the drive member 14 to move around the spring 17 and the driven member. It comes into contact with the protrusion 16 of the member 15, generates an abnormal noise, and gives an uncomfortable feeling to the occupant.

(Technical Problem of the Present Invention) The technical problem of the present invention is to eliminate the problems of the prior art described above.

(Technical means of the present invention and its effects) In order to solve the above-mentioned problems, the present invention uses a technical means that allows the driving member and the end of the coil spring to support each end of another spring. . Adoption of this means allows the U-spring to widen the distance between one end of the notch of the drive member and the end of the coil spring, and also to increase the distance between the other end of the notch and the other end of the coil spring. The contact relationship is established, and rattling of the drive member is suppressed by another spring.

(Example) An example of the present invention is shown in FIGS. 1 and 2.
Components that are the same as those in the example shown in FIGS. 4 and 5 are designated by the same reference numerals, and their explanations will be omitted.

A U-spring 20, which is held at each end and which tends to open outward, is arranged at one end of the notch 13 of the drive member 14 and the end (17a or 17b) of the coil spring 17. The arc portion of the U-spring 20 extends to the center of the drive member 14 and is protected by a rising wall 14a around it. In the example shown in FIG. 1, when the drive member 14 is rotated counterclockwise, the end surface of the notch 13 of the drive member 14 comes into contact with the end 17a of the coil spring 17 while bending the U-spring 20. , move the coil spring 17 in the tightening direction to release the frictional force between the coil spring 17 and the case 12, and then,
The protrusion 16 of the driven member 15 is rotated counterclockwise.

On the other hand, movement from the driven member 15 causes the protrusion 16 to move the coil spring 17 in the winding/unwinding direction, increasing the frictional force between the coil spring 17 and the case 12, and preventing movement from the driven member 16.

In the example shown in FIG.
3 and the other end is the protrusion 16
1, and is supported by the end 17a of the spring 17, but its function is substantially the same as in the example shown in FIG.

By the way, in the example of FIGS. 1 and 2,
Since the U-spring 20 elastically resists meaningless movements from the handle side and does not move the drive member 14, the generation of abnormal noises experienced in the past can be prevented.

The meaningless movement of the drive member 14 in the axial direction bends the end of the U-spring 20, as shown in FIG. This is possible.

(Effect) In the present invention, one end of the spring is supported by a driving member and the other end is supported by a coil spring,
The biasing force of the spring tends to move the coil spring in the tightening direction. Therefore, the operating force of the handle does not become heavy. Also, u-
There is no need to change the structure of the spring coupler to attach the spring, and the present invention can be easily applied to existing ones.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of the present invention, Fig. 2 is a plan view showing another example of the invention, Fig. 3 is a partial side view showing a modification of the U-spring, and Fig. 4 is a spring cutter. FIG. 5 is a side sectional view of a conventional spring coupler, and FIG. 6 is a plan view thereof. In the figure, 12...Case, 13...Notch, 14
... Drive member, 15 ... Driven member, 16 ... Protrusion, 17 ... Spring, 18 ... Handle, 2
0...U-spring.

Claims (1)

[Scope of utility model registration request] A drive member that is rotated by an operating means, a driven member having protrusions spaced apart from each other in a notch provided in the drive member, a case surrounding both of the members, and a case that extends along an inner circumferential wall of the case. A coil spring arranged so that its end can come into contact with the end surface of the notch, and another spring whose one end is supported by the drive member and whose other end is locked to the end of the coil spring. Spring Katsupura.