JPH0355735Y2 - - 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. 9, an automobile window glass has a lift arm 3 assembled in an X shape in 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 side of the window glass 1 on the door side, guide rollers 10 fixed to both sides of the window glass 1 are slidably fitted into the guide rail 9, and the lift arm 3 The movement of the window glass 1 is guided by these guide rollers 10 so that the movement of the window glass 1 follows a constant trajectory.

The spring coupler used in the above-mentioned window glass opening/closing mechanism includes a case 12 supported by a fixing member 11 as shown in FIGS. 10 and 11.
A driving member 14 having a notch 13 therein is disposed, and a protrusion 16 of a driven member 15 is disposed with a gap within the notch 13 formed in the driving member 14.
A spring 17 is provided between the case 12 and the drive member 14, and is connected to the inner wall of the case 12 with a frictional force. A shaft 19 connected to an operating means 18 such as a handle or a lever is connected to a drive member 1.
4, and the driving member 14 is fixed by the operating means 18.
When the drive member 14 is rotated counterclockwise, the end face of the notch 13 of the drive member 14 engages with one end 17a of the spring 17, and when the drive member 14 is rotated clockwise, the notch 13
The other end surface 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. Thereafter, the notch 13 comes into contact with the protrusion 16 via the end of the spring 17, and the driven member 15 is rotated by the drive 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 5, 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 frequently used not only in the window glass opening/closing mechanism shown, but also in seat reclining mechanisms, headless mechanisms, and the like.

By the way, as is clear from FIG. 11, 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 rough roads 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 driven member 1
5, which makes an abnormal noise and gives an unpleasant 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 of disposing a friction control material between the stop spring and the drive member. This friction control material prevents rattling of the drive member and prevents the generation of abnormal noise.

(Example) An example of the present invention will be described below. The same components as those in the example shown in FIGS. 10 and 11 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

In the example shown in FIG. 1, both ends 17c and 17d of the stop spring 17 are connected to a drive member (core)
The diameter R ₁ is smaller than the diameter R ₂ of the outer peripheral surface. As a result, both ends 17c and 17d of the spring 17
is in close contact with the outer peripheral surface of the drive member 14, preventing free movement of the handle in the rotational and axial directions. When the handle is rotated and the drive member 14 is rotated, the outer circumferential surface of the drive member 14 touches the end 17 of the spring 17.
c, 17d are pushed apart, and the end of the driving member 14 comes into contact with the end 17a or 17b of the spring 17,
The spring 17 is tightened to release the frictional force of the spring 17 against the inner peripheral surface of the case 12. From then on, it functions as before. Further, when an external force is applied to lower the window glass, the driven member 15 applies a force in the direction of unwinding the spring 17, pressing the spring 17 against the inner circumferential surface of the case 12, and the driving member 14 is not rotated.

A guide surface 14 is provided on the side edge of the notch 13 of the drive member 14 and on the outer peripheral surface of the drive member 14.
By forming a, the difference between R ₂ - R ₁ can be made large, and the ends 17c and 17 of the spring 17 can be
The pushing and spreading by the driving member 14 of d becomes smooth.

The _coil spring 17 _shown in FIG. As with the example shown in Figure 1, there is no wobbling of the handle.

In the example shown in FIG. 3, one end 17a of the spring 17 is bent toward the inner circumferential surface 14b of the drive member 14, and this bent portion 17c and the inner circumferential surface 14b of the drive member 14 are brought into frictional contact. This function is substantially the same as that shown in FIG.

In the example shown in FIG.
0, and a short and long elastic pipe 22 with a rubber material 21 inserted inside is housed in this groove 20.
This pipe 22 is in frictional contact with the spring 17, and this frictional contact restricts the free movement of the drive member 14 and prevents the handle from rattling.

In the example shown in FIG. 5, the drive member 14 is molded from a synthetic resin material, and the shoe 23 is elastically extended so as to cover the groove 20. This shoe 23 is the spring 1
7 to prevent rattling of the drive member 14 and, ultimately, the handle. Elastic material 2 in groove 20
1 may be input and the shoe 23 may be pressed against the spring 17 via the elastic member 21. A leaf spring may be used instead of the elastic material 21. This example also has the same effect as the example shown in FIG.

Another example is shown in FIGS. 6 and 7. Drive member 14
A chord-shaped cutout surface 14d is provided on the rising wall 14c,
A shoe 24 is held on this cutout surface 14d, and a plate spring 25 whose both ends are seated on the cutout surface 14d is engaged with the shoe 24, so that the shoe 24 is brought into frictional contact with the spring 17 by the elasticity of the plate spring 25. In this example, the rotation of the drive member 14 moves the spring 17 in the tightening direction, and at this time, the shoe 24 is moved radially inward of the drive member 14 due to the movement of the spring 17, and the shoe 24 is moved in the first direction. It has the same effect as shown in the figure.

Another example is shown in FIG. In this example, the drive member 1
A shoe 26 is arranged in the groove 20 of No. 4, and the shoe 26 has an elastic fin 27 that seats on the groove surface.
Further, by locking the end portion 28 of the shoe 26 to the drive member 14, the shoe 26 is held by the drive member 14. Put the other end 29 of the shoe 26 into the groove 30,
The end portion 29 should not come into contact with the spring 17. In this example, the shoe 26 has elastic fins 27
The elastic fins 27 are brought into frictional contact with the spring 17 due to their elasticity, and in response to the movement of the spring 17 in the tightening direction, the elastic fins 27 are elastically deformed to allow the movement of the spring 17. Other than that, the operation is the same as the example shown in FIG.

In the example shown in FIGS. 4-8, the elastic member 21 and the top surfaces of the shoes 24 and 26 are brought into contact with the inner surface of the top wall of the case 12 to prevent the drive member 14 from wobbling in the axial direction. In this case, as shown in FIG.
It is preferable to elastically contact the top inner wall surface 12a of the case 12.

(Effects) Since the present invention only intervenes a friction inhibiting material between the drive member and the stop spring, the basic structure of the spring coupler is not changed in design and is an inexpensive improvement. Furthermore, since it does not affect the frictional force between the stop spring and the case, the resistance force does not change depending on the operating direction. Furthermore, since the friction-inhibiting material does not exhibit strong resistance to normal operating forces, it does not give the operator a sense of discomfort.

[Brief explanation of the drawing]

1, 2, 3, 4, 5, and 6 are front views showing examples of the present invention, respectively, and FIG. 7 is a front view seen from the direction of the arrow in FIG. 6. FIG. 8 is a front view showing another example of the present invention, FIG. 9 is a front view showing an example of the use of a spring coupler, FIG. 10 is a side sectional view of a conventional spring coupler, and FIG.
FIG. 1 is a plan view of a conventional spring coupler, and FIG. 12 is a side view showing another embodiment of the present invention. In the figure: 12...Casing, 14...Driving member, 15...Followed member, 17...Spring, 1
9... Axis.

Claims (1)

[Scope of utility model registration request] A drive member that is rotated by an operating means, a driven member having a protrusion disposed with a gap in a notch provided in the drive member, a case surrounding both the members, and a case that extends along an inner circumferential wall of the case. A spring coupler, comprising a spring arranged at both ends thereof and locked in the notch, and further forming at least one sliding resistance part between the spring and the driving member.