JPH0141745Y2 - - Google Patents

Description

[Detailed description of the invention] 1. Purpose (1) Industrial application field of the invention This invention relates to a case for accommodating a spiral spring, and in particular, a case that can accommodate a spiral spring in a state where the winding operation of the spiral spring is smooth. Regarding the containment case.

(2) Problems of this invention in relation to the prior art Usually, a spiral spring is housed in a case, as in Utility Model Publication No. 49-2336, its fixed end is locked to the case, and its movable end is It is locked to a rotating shaft. Then, depending on the rotation of the shaft, it is wound up or rewound within the case. In particular, when a spiral spring is wound in, the spring protrudes in the axial direction due to the lack of parallelism of the spring itself around the rotational axis of the shaft. As a result, the sides of the spiral spring come into contact with the case, and the winding and unwinding of the spiral spring becomes uneven. Furthermore, if the case does not support the sides of the spiral spring at all, the spring will protrude excessively. Therefore, in any case, there is a problem in that it is not possible to ensure the desired load characteristics and durability of the spiral spring.

Therefore, the technical problem of this invention is to enable the case to accommodate the spiral spring in a state where the spiral spring is wound smoothly.

2. Configuration (1) Technical measures taken to solve the above problem The measures taken to solve the above problem are to create a convex extending in the radial direction of the spiral spring on the surface that supports the side of the spiral spring of the case. The reason is that the article was established.

(2) Effect of the above means Since the surface of the case that supports the side of the spiral spring is provided with a protrusion extending in the radial direction of the spiral spring, the spiral spring is prevented from protruding to the side, and The sides of the spiral spring are wound on the protrusions on the support surface of the case. Therefore, the frictional force between the side portions of the spring and the case does not increase excessively, and the spiral spring is wound uniformly. Therefore, the spiral spring exhibits normal loading characteristics.

(3) Examples Typical examples for embodying the means of this invention will be described below. The following explanation will be based on a wind regulator mechanism, particularly a wire type wind regulator mechanism, but it goes without saying that the case according to the present invention can also be used in, for example, a seat belt retracting mechanism.

The general structure of a window regulator mechanism that raises and lowers a door glass using a wire is shown in FIG. 1 is a door, 2 is a door glass, and 3 is a drive device for a window regulator. 4 is a base fixed to the door inner plate 1a with bolts or the like and supports the drive device 3; 5 is a guide;
It guides the raising and lowering of the holder 6 which engages with a bracket 7 fixed to the lower end of the door glass 2.
8 and 9 are doors 1 attached to the upper and lower ends of the guide 5
Mounting plates 10 and 11 are pulleys pivotally connected to the mounting plates 8 and 9, respectively, and guide the wire 13.

Furthermore, the drive device 3 is constructed as shown in FIG. A handle shaft 14 is rotatably disposed on the base 4 and is rotated by a handle (not shown). The handle shaft 14 rotates the drum 15 via a well-known anti-reversal mechanism (not shown). Both ends 16 and 17 of the wire 13 are wound on the drum 15. 18 is base 4
The drum 15 is rotatably supported by a drum case fixed to the drum case. The drum case 18 has a support portion 19 and holds the case 20. Case 2
As shown in FIG. 3, a spiral spring 30 is housed within the spring 30. As shown in FIG. The inner locking end 26 of the spiral spring 30 is locked to a rotating shaft (not shown) of the drum 15, while the outer locking end 27 is locked to a locking portion 28 provided on the case 20. It has been stopped.

Therefore, by the handle, the handle shaft 1
By rotating the drum 15 through the wire 13
When rotated clockwise as shown in Figure 1, the door glass 2
That is, the window glass is lowered. Moreover, in order to raise the window glass 2, the wire 13 may be rotated in the opposite direction.

The spring 30 is locked to the rotating shaft of the drum 15 in a state in which it is wound in advance and has a required biasing force. Moreover, the winding direction of the spring 30 is such that it is wound together with the rotation of the drum 15 when the door glass 2 is lowered. Therefore, the biasing force of the spring 30 is, when the door glass is lowered,
It acts as a resistance that increases the steering force, and when rising, acts as an auxiliary force that reduces the operating force.

Next, the case 20, which is the main part of the present invention, will be explained.

As shown in FIG. 3, the case 20 consists of a case body 20 and a lid 33, each made of synthetic resin. The case body 20a is provided with claws 25, 25. The case body 20a is locked to the support portion 19 of the drum case 18 by the claws 25, 25 while holding the lid body 33 therebetween. The case body 20a has a cylindrical shape with a bottom portion 31. The peripheral wall 29 of the case body 20a holds the outer periphery of the spring 30. Both sides of the spring 30 are supported between the bottom portion 31 and the lid body 3. A locking piece 28 is formed on the peripheral wall 29 of the case body 20a, and the outer peripheral side locking end 27 of the spring 30 is locked. On the other hand, the lid body 33 is provided with an opening 33a, through which the rotating shaft of the drum 15 inserted into the case 20 and the inner circumferential locking end 26 of the spring 30 are locked. It is said to be free.

As shown in FIG. 4, the spring 30 is wound at a constant height. Case 2
0, the gap between the bottom 31 and the lid 33 is approximately at the height of the spring 30. Therefore, both sides of the spring 30 are supported by the bottom 31 of the case 20 and the lid 33. So, spring 30
is prevented from protruding to the side.

As shown in FIG. 5, a protrusion 34 is formed on the inner surface of the lid 33 to guide the side of the spring 30. This protrusion 34 corresponds to the spring 3
They are provided at four locations symmetrically in the radial direction of 0. The cross section of each protrusion 34 is arcuate as shown in FIG. 6, and both ends in the longitudinal direction are tapered as shown in FIG. Therefore, the side portions of the spring 30 are smoothly guided by the protrusions. The number of protrusions 34 is not limited to four. Preferably, there are at least three locations. or,
A protrusion 34 may be provided on the bottom 31 side of the case body 20a.

Incidentally, as shown in FIG. 4, the lid body 33 is fitted onto the shoulder portion 20b of the case body 20a.

Case 20 consisting of the above operates as follows. When the drum 15 rotates, the inner peripheral side locking end 26 of the spring 30 is locked to the rotating shaft of the drum 15, so the spring 30 is wound or unwound. Since it is difficult to make the spring 30 into a spiral shape while maintaining parallelism, when winding it,
The force between the outer peripheral side locking end 27 and the inner peripheral side locking end 26 of the spring 30 that tends to push each other out in the direction of the winding axis of the spring 30 increases. For this reason,
Both sides of the spring 30 partially press strongly against the bottom wall 31 of the case body 20a and the lid 33.
Therefore, both sides of the spring 30 and the case body 2
The frictional force between Oa and the bottom wall 31 or the lid 33 increases.

However, in the lid body 33, the side portions of the spring 30 are supported by the radially arranged protrusions 34. Therefore, it is possible to prevent all of the side portions of the spring 30 from coming into contact with the lid body 33.
Moreover, since the protrusions 34 are arranged radially,
No matter what winding state the spring 30 is in, the lid 33 on the side of the spring 30 always
can be prevented from coming into full contact with the inner surface. Afterwards,
The winding and unwinding of the spring 30 is smooth and uniform on the spring 30.
Since the spring 30 is always wound uniformly, the biasing force of the spring 30 provides a predetermined performance output.

Furthermore, the gap between the bottom wall 31 of the case 20 and the lid 33 is approximately at the height of the spring 30. Therefore, the spring 30 does not rattle within the case 20, and the generation of abnormal noise can be prevented.

Furthermore, the spring 30 is housed inside the case 20 which is sealed except for the opening 33a of the lid 33. Therefore, it is possible to effectively prevent foreign matter from entering the case 20, and in particular, it is possible to prevent the spring 30 from being unable to wind or unwind, which would occur if moisture that entered the case 20 freezes.

3 Effects of the invention (1) Unique effects produced by this invention According to this invention, the gaps between the respective protrusions 34 can be used as grease reservoirs. Therefore, when winding and unwinding the spring 30, the grease is scraped out by the sides of the spring 30, and the spring 30 is wound smoothly over a long period of time.

[Brief explanation of drawings]

Fig. 1 is a front view showing the wire-type wind regulator mechanism, Fig. 2 is a front view showing the drive device, Fig. 3 is a perspective view showing the case according to the present invention, and Fig. 4 is the - line of Fig. 3. 5 is a perspective view showing the lid of the case, and FIGS. 6 and 7 are respectively taken along the - line in FIG.
It is a sectional view partially showing a section along the - line. 20...Case, 20a...Case body, 33
... Lid body, 34 ... Convex stripes.

Claims (1)

[Scope of utility model registration request] In the case housing the spiral spring,
A spiral spring housing case, wherein a protruding strip extending in the radial direction of the spiral spring is provided on a surface supporting a side portion of the spiral spring.