JPH0336111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a window regulator for an automobile door, and more particularly to a so-called wire-driven type window regulator that raises and lowers a window glass by winding and unwinding a wire. Regarding.

BACKGROUND ART Conventionally, a wire-driven type wind regulator is known, such as that shown in Japanese Utility Model Application Publication No. 17473/1983, for example. As shown in FIG. 1, the drive drum 2 as a wire winding drum of the drive device 1 is rotated in the direction A in the figure to wind up the wire 3, and the glass holder 21 connected to the wire 3 is rotated. The wire 3 is raised along the guide rail 22, or the wire 3 is unwound from the drive drum 2 by rotating the drive drum 2, which serves as a wire winding drum, in the direction B in the same figure, and the wire 3 is wound onto the driven drum 4. Glass holder 2 by winding
1 is lowered along the guide rail 22, and the door glass 2 with the glass holder 21 fixed thereto.
The elongation of the wire 3 is absorbed by the relative rotation of the driving drum 2 engaged with the ratchet 5 with the driven drum 4. Specifically, as shown in FIG. 2, the above-mentioned drive device 1 has
A drive drum 2 has ratchet teeth 5a on the peripheral edge of one side, and has one wire end 3a of the wire 3 moored to a locking groove 2a formed on the end face, and a ratchet on the peripheral edge of the side facing the drive drum 2. tooth 5b
The other wire end 3b of the wire 3 is moored to a locking groove 4a formed on the end surface, and the drive drum 2
A bottomed cylindrical driven drum is attached to a shaft 8 that is pivotally supported by a boss portion 7 of a casing 6 on the same axis as the drive drum 2, and is engaged with the ratchet 5 by meshing the ratchet teeth 5a and 5b with the driving drum 2. 4, a waving washer 9 which is a first spring member that urges the driven drum 4 toward the driving drum 2, and a waving washer 9 which is installed inside the driven drum 4, and whose one end is locked to the inner periphery of the drum 4 and whose other end is a waving washer 9. The second spring member 10 is a second spring member that engages with the boss portion 7 of the casing 6 and urges the driven drum 4 in the advancing direction of the ratchet 5.
When the wire 3 is stretched, by rotating the drive drum 2 in the direction A, the ratchet teeth 5a of the drive drum 2 advance against the ratchet teeth 5b of the driven drum 4, absorbing the stretch of the wire 3. do. This function is particularly effective when the door glass 24 is located at the highest position.

By the way, by driving such a wire-driven type wind regulator with a motor,
When configuring a so-called power window regulator, as shown in FIG. 1, a motor 16, a deceleration mechanism 17 consisting of a worm and a worm wheel, and a pinion 18 provided at the end of the output shaft of the deceleration mechanism
A power unit 15 consisting of the following is used. The aforementioned pinion 18 is connected to the disk 19 and the disk 1.
The locking pawl 20 is composed of a plurality of protrusions 20a extending radially with a gathering part at the center on one side of the 9. This locking pawl 20 is attached to the drive drum 2 as shown in FIG. and configured to engage and transmit power. Further, the locking pawl 20 of the pinion 18
A bumper rubber 12 is externally fitted as a buffer to eliminate looseness between the locking pawl 20 and the locking hole 11, and the door glass 24 is fitted when the regulator is not in operation.
This is to prevent noise caused by collision between the locking pawl 20 and the locking hole 11 due to vibrations, and to prevent collision noise between the locking pawl 20 and the locking hole 11 during operation of the regulator.

However, in this conventional structure, when the regulator is operated, the bumper rubber 12 receives the entire input from the pinion 18 as a compressive load between the side surface of the locking pawl 20 of the pinion 18 and the locking hole 11, as shown in FIG. As a result, the bumper rubber 12 undergoes a large flexural deformation from the state shown in A to the state shown in B in the same figure, and power is transmitted to the drive drum 2. This increases the stress on the bumper rubber 12, causing it to lose its durability and become prone to wear out at an early stage. , there was a problem that impaired the function of the bumper rubber. In addition, 13 in Fig. 2 is the casing 6.
14 indicates a casing cover.

Purpose of the Invention In view of the above-mentioned conventional situation, the present invention provides a wind regulator that can avoid excessive compressive load from being applied to the shock absorber during operation of the regulator and improve the durability of the shock absorber. The purpose is to

Structure of the Invention In order to achieve the above object, in the present invention, the locking pawl of the pinion of the power unit is engaged with a locking hole formed in the center of the wire winding drum via a buffer body, and the pinion of the power unit is The structure is such that the wire is wound and unwound by operation, and a glass holder connected to the wire is moved up and down along a guide rail to raise and lower the door glass, and a buffer is provided in the locking hole of the wire winding drum. A stopper portion is formed to restrict the bending deformation of the body.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

That is, as shown in FIGS. 5 to 7, the present invention includes a drive drum 2 as a wire-wrapped drum to which one end of a wire 3 is tethered, and the other end of the wire 3 is tethered and is pivotally supported on a shaft 8A on the casing 6 side. A driven drum 4, which is also a wire-wrapped drum, is disposed on the same axis as the driving drum 2, and is engaged with the driving drum 2 by a ratchet 5, and urges the driven drum 4 toward the driving drum 2. The waving washer 9 as a first spring member, the spiral spring 10 as a second spring member that biases the driven drum 4 in the advancing direction of the ratchet 5, and the side locking pawl 20 of the pinion 18 are connected to the center of the drive drum 2. It is equipped with a power unit 15 that engages with a locking hole 11A formed in the hole 11A through a bumper rubber 12 as a shock absorber and operates the drive drum 2. Winding the wire 3 between
By unwinding, the glass holder 21 connected to the wire 3 is moved up and down along the guide rail 22 to raise and lower the window glass 24. A stopper portion 25 is formed to restrict the bending deformation of the portion 12.

In this embodiment, a locking pawl 20 is provided on the side surface of the disk 19 of the pinion 18, and a plurality of protrusions 2 are provided independently on the same circumference near the periphery of the disk 19.
0A, and a plurality of locking holes 11A in the center of the drive drum 2 corresponding to these protrusions 20A.
It is formed by penetrating it. Furthermore, a bearing hole 30 is formed in the center of the drum surrounded by the plurality of locking holes 11A, and the support shaft 8A of the driven drum 4 is inserted through the bearing hole 30. The driving drum 2 and the driven drum 4 are arranged coaxially. A bearing hole 31 is also formed in the center of the disk 19 to bear the end of the shaft 8A, and the shaft 8A is supported on both sides by the boss 7 on the casing side and the disk 19.

Further, the stopper portion 25 is integrally provided on the opening edge of the locking hole 11A facing the driven drum 4 and protrudes toward both sides of the locking pawl 20.

According to the above embodiment structure, the bumper rubber 1 is moved by the rotation of the pinion 18 when the regulator is operated.
2 receives a compressive load due to the input from the locking pawl 20, this bumper rubber 12
Although it is deflected in the compression direction in a more protruding area,
When the locking pawl 20 locks with the stopper part 25, further deflection deformation is restricted, and the input from the pinion 18 is directly transmitted to the drive drum 2 via the stopper part 25. As a result, bumper rubber 1
An excessive compressive load is not applied to the bumper rubber 12, and the durability of the bumper rubber 12 can be further improved.

In particular, as in this embodiment, the locking pawl 20 is provided with a plurality of independent protrusions 20A near the periphery of the disk 19.
By doing so, the locking hole 11A of the drum 2 is provided on the same circumference away from the center of the drum in correspondence with the protrusion 20A, and the bearing hole 30 of the shaft 8A is formed at the center of the drum. Driven drum 4
Since the driving drum 2 can be coaxially arranged with the shaft 8A, even if the drum width of the driving drum 2 is set to the height dimension of the locking pawl 20, misalignment will occur due to the coaxial arrangement with the driven drum 4. There is an advantage that the drive device 1 can be made more compact by narrowing the width of the drive drum 2.

In the embodiment shown in FIG. 8, the bumper rubber 12 is formed shorter than the length in the radial direction of the projection 20A, and the bumper rubber 12 is formed to be shorter than the length in the radial direction of the projection 20A. The stopper portion 25 is integrally provided, and in this case as well, the same stopper effect as in the embodiment described above can be obtained and the durability of the bumper rubber 12 can be improved.

Note that the present invention can be similarly applied even when using a pinion 18 having a conventional locking pawl 20 shown in FIGS. 1 to 4. Further, the shock absorber can be made of a flexible soft resin instead of a rubber one.

Effects of the Invention As described above, according to the present invention, it is possible to restrict the deflection deformation in the compression direction of the buffer body interposed between the pinion locking pawl and the locking hole of the wire wrapping drum to a certain amount. As a result, an excessive compressive load is not applied to the shock absorber when the regulator is activated, and the durability of the shock absorber can be improved and its buffering function can be maintained over a long period of time, which is a great practical effect. has.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a conventional wind regulator, Fig. 2 is an exploded perspective view of the drive device of the regulator, Fig. 3 is a sectional view of the same assembled state, and Fig. 4 is the same as the Fig. A cross-sectional view taken along the - line of
5 is an exploded perspective view of an embodiment of the present invention, FIG. 6 is a sectional view of the assembled state, and FIG. Figure 7 is a sectional view taken along the - line in Figure 6.
A is a normal state diagram of the bumper rubber, B is a compression deformation state diagram thereof, and FIG. 8 is a sixth diagram showing a different example of the present invention.
FIG. 1... Drive device, 2... Drive drum (wire wrapped drum), 3... Wire, 4... Driven drum (wire wrapped drum), 5... Ratchet, 8,8
A... Shaft, 9... First spring member, 10...
Second spring member, 11, 11A...Locking hole, 12...
... Bumper rubber (buffer), 15 ... Power unit, 18 ... Pinion, 20 ... Locking claw, 2
1...Glass holder, 22...Guide rail, 2
4... Door glass, 25... Stopper section.

Claims (1)

[Claims] 1. The end of the wire is moored to the wire winding drum, and the locking pawl of the pinion of the power unit is engaged with the locking hole formed in the center of the wire winding drum via a buffer body, and the power unit is operated. The structure is such that the door glass is raised and lowered by winding and unwinding the wire and moving the glass holder connected to the wire up and down along the guide rail, and the locking hole of the wire winding drum. A wind regulator characterized in that a stopper portion is formed to restrict deflection deformation of a buffer body.