JPH074313Y2 - Driven drum for window regulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a driven drum for a cable type window regulator. More specifically, it relates to a driven drum having a cavity in which an accessory can be provided.

[Prior Art] Conventionally, for example, a window regulator shown in FIG. 2 has been used as a means for opening and closing an automobile window. This window regulator transmits the rotational drive of the worm (61) to a drum (57) consisting of a drive drum (57a) and a driven drum (57b), and one end of each is locked to the outer periphery of the drum (57). A drive device (63) for converting the two wires (58) which are wound and wound in opposite directions to each other into a linear movement of the wires (58) by winding and sending out by the drum (57). )When,
The window glass (6) to which the other end of the wire (58) is fixed.
2) and the like, and a driven device (64) for guiding the same in the opening / closing direction (arrow (b) direction).

As a drive device (63) used in such a window regulator, for example, one shown in FIG. 3 is known. This drive device includes a casing (51), a worm wheel (60) rotatably provided in the casing (51), a worm (61) meshed with the worm wheel (60) and driven by a motor, and the worm. Drive drum (57a) to which torque is transmitted from the wheel (60)
And driven drums (57b), these drums (57a),
Drums (57a), (57) for connecting (57b) together.
b) Ratchet teeth (65
Wave washers (5) for engaging a) and (65b)
5) and a spring spring (56) that prevents the required power from changing depending on the direction of rotation.

Driven drum (57b) to provide a spring spring (56)
Has a hollow portion inside, and the hollow portion is opened to one side surface of the driven drum (57b) for attachment or detachment work of the spring spring (56). An inner end of the main spring (56) is locked to a support shaft (54) projecting inside the casing (51), and an outer end of the spring (56) is drum (57).
b) Locked inside. In addition, in FIGS.
2) is the inside of the casing (51), (53) is the wire (58)
Of the spring, (54) is the locking projection of the spring (56),
(59) is a locking portion at the end of the wire (58).

[Problems to be Solved by the Invention] However, when a driven drum having one side surface opened is used, water that has entered the casing can easily reach the cavity of the drum. Has the drawback that it is easily corroded. As the mainspring, a steel spring is generally used because of its functional requirements, and it is possible to eliminate this drawback by changing it to a material with high corrosion resistance, but it becomes expensive. Therefore, it is not preferable.

Further, the fact that one side surface of the driven drum is open has a cantilever structure, which is disadvantageous in terms of strength.

An object of the present invention is to provide an inexpensive driven drum for a wind regulator which can solve the above-mentioned drawbacks.

[Means for Solving the Problems] A driven drum for a window regulator according to the present invention has a hollow portion in which an accessory can be provided, and a ratchet formed along the circumferential direction on an end surface of the hollow portion. A pair of first drum elements, which are driven drums for a window regulator to which driving force is transmitted from a driving drum, and which form one drum in which the cavity is substantially closed by closely fitting each other, and The first drum element is formed of a second drum element, and an axially projecting projection is formed on an end surface of the first drum element facing the second drum element. The inner peripheral surface of the protrusion of the first drum element is formed with a notch that can be closely fitted.

The accessory parts include a spiral spring and a wire end fixing structure.

[Operation] In the present invention, when the pair of the first drum element and the second drum element are fitted and combined with each other, the driven drum having the cavity therein is formed, and both side surfaces of the driven drum are substantially formed. Is blocked.

Therefore, it is possible to prevent entry of water and the like into the cavity and to improve the strength by making the driven drum a structure of supporting both ends.

Example Next, an example will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a driven drum for a window regulator according to the present invention. The first drum element (1) has a cavity (3) for providing a mainspring spring, a wire end fixing structure, etc., and one opening side end surface thereof can be fitted to the second drum element (2). The notch (1b) is formed so that the protrusion (1a) protrudes in the axial direction, and the ratchet teeth (1c) are formed on the other end face to receive the rotational force from the driving side (not shown). Has been done. On the side peripheral surface of the second drum element (2), a notch (2a) having a shape capable of tightly fitting with the inner peripheral surface of the protrusion (1a) of the first drum element (1) is formed. Between the cutouts (2a), there is formed a protrusion (2b) which can be fitted into the cutout (1b) of the first drum element (1). If the first drum element (1) and the second drum element (2) are fitted so that the protrusion (1a) and the notch (2a) and the notch (1a) and the protrusion (2b) are closely fitted, respectively. , The drum elements are in close contact with each other, and they (1),
Since it is between (2), water cannot easily enter.

In the embodiment shown in FIG. 1, the second drum element (2)
Is provided with a wire end fixing structure composed of a recess (4) and a groove (5). The recess (4) has a closed portion on the inner surface side of the drum for attaching or detaching the wire end. There is. The recess (4) and the groove (5) are
Each nipple (7) when the wire ends are fixed
And a part for holding the wire (8).

The driven drum formed by fitting the first drum element (1) and the second drum element (2) together has, for example, the same arrangement as the above-mentioned conventional example (the drum (57) in FIGS. 2 and 3). It is installed in the casing (51).

In this way, when the first drum element (1) and the second drum element (2) are fitted together, the driven drum has a structure of supporting both ends, which is advantageous in strength as compared with a drum whose side surfaces are open. Is. Although an accessory such as a mainspring may be attached to the inside of the driven drum, it may be used as a type not attached.

When water such as rainwater enters the casing, even if the outer surface of the driven drum gets wet with water, the mainspring provided inside the driven drum is protected by the driven drum.

Since the driven drum can be made of, for example, a synthetic resin, it is possible to easily manufacture a driven drum that is inexpensive and has excellent corrosion resistance.

Further, in the present embodiment, the wire end fixing structure including the concave portion (4) and the groove portion (5) is provided in the second drum element (2). A secondary advantage is that the spring end prevents the nipple (7) from coming out of the opening of the recess (4) inside the driven drum, so that there is almost no possibility that the wire end will come off the drum during use. There is also.

[Effects] According to the present invention, among the drums used in the drive device of the window regulator, the driven drum has a structure in which a pair of the first drum element and the second drum element are fitted to each other, and a spring spring or the like is provided on the side surface of the drum. Since the opening for attaching or detaching the spring is not provided, even if water or the like enters the casing during use, corrosion of the main spring is prevented.

Further, since the strength of the driven drum itself is improved, the durability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a driven drum for a window regulator according to the present invention, FIG. 2 is an explanatory view showing the entire structure of a conventional window regulator, and FIG. 3 is a window regulator including a drum for a conventional window regulator. It is an exploded perspective view showing a drive part. (Main symbols in the drawing) (1): First drum element (1c): Ratchet tooth (2): Second drum element (3): Cavity (6): Spring spring

Claims (1)

[Scope of utility model registration request] 1. A driven drum for a window regulator, which has a hollow portion in which an accessory can be provided, and in which a driving force is transmitted from a driving drum via a ratchet formed on an end surface thereof along a circumferential direction. A first drum element and a second drum element that are closely fitted to each other to form a drum in which the cavity is substantially closed. A projecting portion projecting in the axial direction is formed on an end surface of the element facing the second drum element, and an inner peripheral surface of the projecting portion of the first drum element is closely fitted to an outer peripheral surface of the second drum element. A driven drum for a wind regulator, which is formed with a notch that can be fitted.