JPH0245425Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a spiral spring locking portion of a driving drum in an automobile wind regulator device or other drums.

Automotive window regulator devices are capable of lifting and lowering window glass by rotating a drum in forward and reverse directions by operating a motor or manually operating a rotating handle, and by running a wire wound around the drum back and forth. In this type of wind regulator device, in order to prevent the weight of the window glass from affecting the operating force, there is a space between the drum and the case that supports it.
It is common to use a spiral spring as a balance spring.

As shown in FIG. 1, conventionally, such a spiral spring a is housed in a recess c formed at one end of a drum b, and a U-shaped bent part d at the outer end is connected to the recess in the drum b. In the L-shaped engagement hole e drilled on the outer periphery of c, and with a right-angled bent part f at the inner end,
Boss part h of the case that supports the rotating shaft g of the drum b
Each of the drums is engaged with a slit i cut in the slit i, and the drum b is always urged in one rotation direction with respect to the case.

However, simply locking the U-shaped bent portion d of the spiral spring a into the L-shaped engagement hole e drilled from one end surface of the drum b will not work when the window glass is raised or lowered. , the U-shaped bent portion d is displaced to the side (to the front in Figure 1) from the engagement hole e, and the end surface of the spiral spring a comes into sliding contact with the case, and the operating force becomes heavy due to the frictional resistance. , the case may wear out, or in some cases, the U-shaped bent portion d may completely come off from the engagement hole e, and the entire spiral spring a may pop out from the recessed portion c of the drum b.

In order to eliminate such a fear, it is preferable to close the opening end of the engagement hole e and form the engagement hole e into a bag shape. This is extremely difficult when molding the drum b from a synthetic resin material due to mold cutting and the like.

Such problems are not limited to the drive drum of the wind regulator device.
This is a problem in any case where a spiral spring is housed in a synthetic resin drum.

The purpose of the present invention is to provide a structure for a spiral spring locking part in a drum that eliminates such problems. A first bottomed hole and a second bottomed hole facing in substantially the same direction as the axis are bored in a staggered manner so that one side of their inner parts overlap each other and communicate with each other, and the first bottomed hole By communicating the hole and the recess for storing the spiral spring, an engaging hole is formed which is bent outward from the periphery of the recess into a hook shape and has a bag-shaped tip, The U-shaped bent portion at the outer end of the spiral spring can be locked.

Hereinafter, a specific example shown in FIG. 2 and subsequent figures will be described in which the present invention is applied to a wire winding drum in a wind regulator device for an automobile.

Reference numeral 1 denotes a vertically facing rail fixed to the inner panel of the door (not shown), and a carrier plate 3 fixed to the lower end of the window glass 2 is attached to this rail 1 so as to be slidable in the vertical direction. has been done.

Two wires 4, 5 are attached to the carrier plate 3.
Each end of the wire 4 is fixed, and one wire 4 rises upward along the rail 1, and then is guided to a guide roller 6 that is pivoted to the top of the rail 1 and a flexible cable conduit 7. case 9 in the drive device 8
After being wound around the outer periphery of the first drum 10, the end thereof is fixed to the outer periphery of the first drum 10.

The other wire 5 hangs down from the carrier plate 3, then rotates the guide roller 11 pivoted on the lower part of the rail 1 by half a turn, rises upward parallel to the rail 1, and is attached to an appropriate guide from the upper part of the rail 1. It enters the case 9 guided by the wire piece 12 and the flexible cable conduit 13, and is wound around the outer periphery of the second drum 14 in a direction opposite to the direction in which the wire 4 is wound around the first drum 10 described above. After that, the terminal is fixed to the outer periphery of the second drum 14.

The case 9 includes a bottomed cylindrical portion 9a that accommodates the first drum 10 and the second drum 14, and a guide that extends in the tangential direction of the cylindrical portion 9a in a bifurcated manner and guides the wires 4 and 5. The opening of the bottomed cylindrical portion 9a is closed by a lid plate 15 and is fixed to the inner panel of the door.

At the center of the bottomed cylindrical portion 9a of the case 9, there is a lid plate 1.
5 and the inner panel, a rotating shaft 16 projecting inward of the door is pivotally installed, and the above-mentioned first drum 10 and second drum 14 are pivotally supported on this rotating shaft 16 so as to be relatively rotatable. . Note that 9d is a boss portion formed at the center of the bottom of the bottomed cylindrical portion 9a of the case 9 in order to support the rotating shaft 16.

The first drum 10 and the second drum 14 form winding drums for the wires 4 and 5, and their opposing end surfaces allow relative rotation in the direction in which the wires 4 and 5 are wound around each other. Ratchet teeth 17a and 17b are respectively formed to mesh with each other so as to prevent relative rotation in opposite directions.

A circular recess 18 is formed in the surface of the first drum 10 facing the bottom side of the case 9, and the first drum 10 is inserted into the recess 18 in the direction in which the wire 4 is wound, that is, as shown in FIG. By biasing the first drum 1 through the wire 4
A spiral spring 19 is housed in order to balance the dead weight of the window glass 2 acting on the windshield.

A bent portion 19 formed by bending the inner end of the spiral spring 19 at right angles toward the center of the rotating shaft 16
a is locked in a longitudinal slit 20 cut in the outer periphery of the boss portion 9d of the case 9.

The outer end of the spiral spring 19 is folded outward in a U-shape to form a U-shaped bent portion 19b.
The character-shaped bent portion 19b is locked to a locking portion A of the present invention which will be described in detail later.

21 is a reversal prevention mechanism that transmits the rotational force from the rotating shaft 16 to the second drum 14, but prevents the rotational force from the second drum 14 side from being transmitted to the rotating shaft 16 side, and its structure is different from the conventional one. Since it is the same as a known one commonly used in wind regulator devices, detailed explanation thereof will be omitted.

22 is this reversal prevention mechanism 21 and the second drum 1
4, and by urging the second drum 14 toward the first drum 10 by this spring 22, both ratchet teeth 17 are compressed.
The meshing between a and 17b is ensured.

Thus, when the wires 4 and 5 are not loose, the handle 23 attached to the tip of the rotating shaft 16
By rotating clockwise or counterclockwise in FIG. 2, the first drum 10 and the second drum 14 rotate together, the wires 4 and 5 reciprocate, and the carrier plate 3, the window glass 2 can be raised and lowered along the rail 1.

In addition, if the wires 4 and 5 become loose,
By relatively rotating the first drum 10 and the second drum 14 in the direction in which the wires 4 and 5 are wound around each other by the biasing force of the spiral spring 19, the slack in the wires 4 and 5 is removed. Ru.

In this example, the present invention is embodied by making the locking portion A in the first drum 10 have the following structure.

That is, as clearly shown in FIGS. 5 to 8, on the outer periphery of the recess 18 in the first drum 10,
From the end surface (front end surface) of the first drum 10 on which the recess 18 is located, a surface having the same depth as the recess 18 and the central axis of the first drum 10 (coinciding with the central axis of the rotating shaft 16) The end face of the first drum 10 on which the ratchet teeth 17a are located has a first bottomed hole 24 facing in substantially the same direction, communicating with the recess 18, and having a substantially horizontal L-shape in front. It has a required depth that leaves a slight wall thickness D from the front end surface (rear end surface), faces approximately in the same direction as the center axis of the first drum 10, and has a first bottomed hole on one side of the rear end. By drilling a second bottomed hole 25 having a substantially rectangular longitudinal section and communicating with the first bottomed hole 24 in a staggered manner, the second bottomed hole 25 is bent outward from the periphery of the recess 18 into a hook shape. , and the front end surface side of the tip portion is closed by a closing piece 26 having a wall thickness D to form a bag-shaped engagement hole 27, and the U-shaped bent portion 19b of the spiral spring 19 is inserted into the engagement hole 27. It is designed so that it can be locked.

28 is a projecting piece formed between the first bottomed hole 24 and the second bottomed hole 25 by drilling them in the first drum 10 and the recess 18 . The tip of the protruding piece 28 is rounded to match the inner shape of the folded portion of the U-shaped bent portion 19b of the spiral spring 19.

Since the present invention has the above-described configuration, once the U-shaped bent portion 19b of the spiral spring 19 is locked in the engagement hole 27, the U-shaped bent portion 19b of the first drum 10 is fixed. There is no fear that it will be misaligned in the direction of the central axis or completely detached from the first drum 10, which eliminates the conventional problems of friction between the spiral spring and the case and problems of the spiral spring popping out from the drum. be able to.

Further, according to the present invention, when the first drum 10 is molded from a synthetic resin material, the first bottomed hole 24
By forming a convex portion complementary to the second bottomed hole 25 and a convex portion complementary to the second bottomed hole 25 on the mold members facing each other at 180 degrees, a part of the hole is shaped like a bag. There is an advantage that the engagement hole 27 having a shape can be easily formed and the problem of cutting out the mold can be solved.

It goes without saying that the present invention can be applied not only to the above-mentioned specific example but also to any case where a spiral spring is housed in a drum.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the main parts showing an example of a locking structure of a spiral spring to a drum in a conventional wind regulator device, and FIG. 2 is a front view of a window equipped with a first drum to which the present invention is applied. FIG. 3 is an enlarged sectional view of only the case taken along the - line in FIG. 2, and FIG. 4 is a front view showing the overall configuration of the regulator device. The enlarged cross-sectional view of the whole section, FIG. 5, is the − of FIG.
The vertical cross-sectional view along the line, FIG. 6, is the − of FIG. 5.
7 is a sectional view taken along the line - in FIG. 6, and FIG. 8 is a perspective view of the main part of the first drum. 8... Drive device, 9... Case, 10... First
Drum, 14...second drum, 16...rotating shaft,
18... recess, 19... spiral spring, 19a...
Bent part, 19b... U-shaped bent part, 20... Slit, 24... First bottomed hole, 25... Second bottomed hole, 26... Closure piece, 27... Engagement hole, 28...
Projection piece, A...Locking part, D...Thickness.

Claims (1)

[Scope of utility model registration request] A recess for storing a spiral spring is formed at one end of the drum, and a first orifice is formed at one end and the other end of the drum on the outer periphery of the recess, facing substantially the same direction as the central axis of the drum, and communicating with the recess. a second hole which faces in substantially the same direction as the bottom hole and the center axis of the drum, and whose inner side portion communicates with the first bottomed hole;
By drilling the bottomed holes in a staggered manner, the engaging hole is bent outward from the periphery of the recessed portion in a hook shape, and has a bag-shaped tip. A structure of a spiral spring locking part in a drum, characterized in that it can lock a U-shaped bent part at the outer end of the spiral spring housed in the recess.