JP2966049B2 - Drive device for cable type wind regulator - Google Patents

Description

The present invention relates to a drive device for a cable type window regulator. More specifically, the present invention relates to a device for driving a cable in a cable-type window regulator for opening and closing a window glass of a car, a building, or the like.

[Prior Art] In a conventional drive device for a cable-type window regulator, a spiral spring (balance spring) is used to balance the operating force when the window glass is raised and lowered.
(For example, JP-A-60-246977). Such a spiral spring is disposed concentrically with a wire driving drum (50) driven to rotate by a driving shaft (55) as shown in FIG.
It is housed in the housing (51) so as to give a biasing force in the direction of lifting the window glass to 0).

In the driving device shown in FIG. 6, the spiral spring (52) is accommodated in a bottomed cylindrical spring case (53). A crank handle (57) is fixed to the end of the drive shaft (55), and the spring case (5
3) and the drum (50) are provided rotatably on the drive shaft (55). The drum (50) is engaged with the flange (56) of the drive shaft (55) with play in the rotation direction.

In such a conventional drive device, when the window glass is lowered, the load is increased by involving the spiral spring,
The load can be reduced by using the restoring force of the spiral spring when ascending, so that the ascent and descent can be balanced.

[Problem to be Solved by the Invention] In the conventional driving device, when the weight of the window glass is large, the operating force is increased by increasing the crank handle (57) or decreasing the diameter of the drum (50). Have an appropriate range. However, the radius of the crank handle is limited for convenience of operation, and the drum diameter is limited by the minimum radius of curvature of the wire, so that the balance force is insufficient. To increase the biasing force of the spiral spring, a considerably large spiral spring and a spring case (53) are required. Furthermore, there is a problem that various spring cases and, consequently, housings must be prepared according to the window glass.

The present invention solves such a problem, and can provide a sufficient balance force even for a heavy window glass, and can provide an appropriate balance force according to the window glass weight by changing only a few components. It is intended to provide a drive device for a window regulator.

[Means for Solving the Problems] A drive device for a cable-type window regulator according to the present invention is (a) a housing and (b) rotatably supported in the housing, and winds and sends out a cable for raising and lowering a window. (C) a drive shaft rotatably supported in the housing substantially parallel to the drum, and (d) a drive shaft arranged concentrically with the drive shaft and having one of the drive shafts. (E) a first gear that is concentrically engaged with the spiral spring and that is capable of transmitting torque, and (f) a spiral spring for biasing the spiral spring in the rotational direction.
Concentrically connected to the drum and capable of transmitting torque,
A second gear meshing with the first gear,
(G) the spiral spring comprises a first gear and a second gear;
A first ratchet tooth is radially formed on an end surface of the drum, and the first gear is formed on a side surface of the second gear. A second ratchet tooth meshing with the ratchet tooth is formed.

In such a drive device, when the weight of the window glass is large, the diameter of the second gear is set to be larger than that of the first gear, thereby reducing the operation force by performing a deceleration action.
At the same time, the biasing torque of the spiral spring can be increased and transmitted to the drum, and by engaging the drum and the second gear with ratchet teeth, the cable can be slackened when assembling the window regulator.

[Operation] The rotational operation of the driving force is transmitted to the drum via the first gear and the second gear, and one of the two cables locked and wound on the drum is wound up and the other is sent out. Thus, the window glass can be moved up and down via the cable.

When the window glass is lowered, the spiral spring is involved with the rotation of the drive shaft, and when the window glass is raised, it is released.

The torque of the spiral spring is increased (decelerated) or decreased (increased) according to the gear ratio of the first gear and the second gear and transmitted to the drum to balance with the weight of the window glass.

Therefore, an appropriate balance force according to the weight of the window glass can be given, and a smooth operation can be performed. Further, since it is only necessary to change the gear ratio between the first gear and the second gear, there is an advantage that other parts such as the spiral spring and the housing can be shared.

[Embodiment] Next, a driving device of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are a sectional view and an exploded perspective view, respectively, showing an embodiment of the driving device of the present invention, and FIGS. 3 and 4 are second gears and drums of the driving device of FIGS. FIG. 5 is a front view showing one embodiment of a window regulator provided with the driving device of the present invention.

In FIG. 1, the housing (1) comprises a main body (1a) and a lid (1b). The main body (1a) has a first chamber (3) in which the drive shaft (2) is housed, and a second chamber (5) in which the drum (4) is housed.

A first boss (7) protrudes from the bottom center of the first chamber (3) and rotatably supports the drive shaft (2) together with the hole (8) of the lid (1b). A drive means such as a motor or a crank handle (10) is connected or fixed to an end of the drive shaft (2) projecting from the hole (8) of the lid (1b).

A bottomed cylindrical spring case (9) is rotatably provided on the outer periphery of the drive shaft (2), and a spiral spring (11) is housed in the spring case (9). The inner end of the spiral spring (11) is engaged with the first boss (7), and the outer end thereof is engaged with the spring case (9). A) It is urged to rotate in the direction.

A first gear (1) is provided on the outer periphery of the upper part of the spring case (9).
2) are integrally formed, and two conventionally known fan-shaped engaging projections (13) are provided on the upper end surface. On the other hand, a flange (14) is fixed to the drive shaft (2), and the flange (14) has a sector-shaped notch (15) that can engage with the engagement protrusion (13) with play in the rotation direction. )
Are formed. As a result, torque transmission between the drive shaft (2) and the spring case (9) becomes possible.

The outer peripheral surface of the flange (14) of the drive shaft (2) and the lid (1
A conventionally known brake spring (17) is inserted between the inner peripheral surface of the cylindrical portion (16) protruding from b), and the bent portions (17a) and (17b) at both ends are respectively provided. It is inserted into a gap between the notch (15) and the engaging projection (13). The play between the flange (14) and the engagement projection (13) is for operating the brake spring (17).

A second boss (18) protrudes from the bottom center of the second chamber (5) of the housing body (1a), and penetrates the slit (21) of the lid (1b) through the second boss (18). The lower end of the pin (19) is fitted. A flange (20) is formed on the upper end of the pin (19), and a slit (21) of the lid is formed on the lower surface of the flange (20).
A step (22) that fits with the pin is formed to restrict the rotation of the pin (19).

On the outer periphery of the pin (19), a second gear (24) meshing with the first gear (12) and a drum (4) for winding and sending out the cables (27) and (28) are rotatable. It is provided in. Radial first ratchet teeth (23) are formed on the upper end surface of the drum (4), and radial first ratchet teeth (23) engaging with the first ratchet teeth (23) are formed on the lower surface of the second gear (24). Two ratchet teeth ((25) in FIG. 3) are formed. The ratchet teeth (23) and (25) are for taking up the slack of the cable when assembling the window regulator. After the lid (1b) is securely attached, the second gear (24) and the drum (4) are connected. Rotate together.

A first cable (27) for lowering the window glass and a second cable (28) for raising the window glass are wound around the drum (4), and an end (27a) of the first cable (27) is a gear. A first locking portion provided on the lower surface of (24) ((27 in FIG. 3)
b)), and the end (28a) of the second cable (28) is locked by a second locking portion ((28b) in FIG. 4) provided on the lower end surface of the drum (4). ing.

The first cable (27) and the second cable (28) sent from the drum (4) pass through slits (29) and (30) (may be holes) provided in the housing body (1a), Through a conduit (31), it is fixed to a carrier plate (34) attached to a window glass (33) of an automobile or the like, for example, as shown in FIG.

The drive device (35) shown in FIG. 5 is connected to a guide rail (36) that slidably guides the carrier plate (34) by two conduits (31) to form a window regulator, and is used as a door panel of an automobile. Attached to. The driving device (35) in FIG. 5 is driven by a crank handle.

Next, the operation of the driving device configured as described above will be described with reference to FIG. 1 and FIG.

1 and 2, the crank handle (10)
When the drive shaft (2) is rotated in the direction of the arrow (A),
The spring case (9) also rotates in the direction of the arrow (A) by the engagement between the notch (15) and the engagement projection (13). At the same time, the second gear (24) meshing with the first gear (12) rotates in the direction of arrow (C), and is engaged with the first ratchet teeth (23) and the second ratchet teeth (25). The drum (4) also rotates in the direction of the arrow (C). In that case, the second cable (28) is wound up and the first cable (27) is sent out. As a result, the windowpane rises.

At this time, the spiral spring (11) is urged to rotate in the direction of the arrow (A), and thus assists the operating force when the window glass is raised.

On the other hand, when the crank handle (10) is rotated in the direction of the arrow (B), the rotation is reverse to the above, the spring case (9) moves in the direction of the arrow (B), and the second gear (24) and the drum (4) move in the direction of the arrow. Rotate in the direction (D). As a result, the first cable (27) is wound up and the window glass is lowered. In that case, the lid (1b) and the body (1a)
Since the gear (24) and the drum (4) are sandwiched, the ratchet teeth (23) and (25) do not idle.

During the lifting operation, the spiral spring (11) moves the spring case (9) in the direction of the arrow (A) as described above.
Since it is urged to rotate in the direction, it assists the operating force when the window glass is raised, and becomes a load when the window glass is lowered.

That is, when operating the window regulator, raising the window glass requires a larger operating force for the weight of the window glass, but the spiral spring assists when ascending and increases the load when descending. Therefore, it is possible to balance the operation force in both the up and down directions.

At this time, the torque generated by the spiral spring (11) is increased by the first gear (12) and the second gear (24) and transmitted to the drum (4), so that even a heavy window glass can be sufficiently balanced.

Further, a spring case (9) and a second gear (24)
By simply changing the gear ratio by exchanging the gears, it is possible to easily configure a device suitable for window glasses of different weights.

In the driving device shown in FIGS. 1 and 2, the drum (4) and the spring case (9) are supported by separate shafts, and are housed in separate picture chambers. There is also an advantage that rainwater does not wet the spiral spring.

[Effect of the Invention] In the drive device of the present invention, a drum for winding a cable,
The spiral spring and the power transmission means are separately arranged, and a deceleration / speed-up mechanism including a first gear and a second gear is interposed therebetween. Because it can apply force and can be adapted to window regulators with window glasses of various weights, and ratchet teeth between the drum and the second gear are formed and engaged, When assembling the window regulator, slack in the cable can be taken.

[Brief description of the drawings]

1 and 2 are a sectional view and an exploded perspective view, respectively, showing an embodiment of a driving device according to the present invention, and FIGS.
5 is a perspective view of the driving device shown in FIGS. 1 and 2 as viewed from below the second gear and drum. FIG. 5 is a front view showing an embodiment of a window regulator provided with the driving device of the present invention. FIG. 1 is an exploded perspective view showing an example of a conventional driving device. (Main symbols in the drawings) (1): Housing (2): Drive shaft (4): Drum (11): Spiral spring (12): First gear (19): Pin (24): Second gear

Claims (3)

(57) [Claims] (A) a housing; (b) a drum rotatably supported in the housing for winding and sending out a cable for raising and lowering a window; and (c) separately from the drum in the housing. A drive shaft rotatably supported on the drive shaft; (d) a spiral spring disposed concentrically with the drive shaft and biasing the drive shaft in one rotational direction; and (e) the spiral spring. And (f) a second gear concentrically with the drum so as to be capable of transmitting torque and meshing with the first gear. (G) the spiral spring comprises a first gear and a second gear;
A drive device for a cable-type window regulator for urging a drum in a rising direction of a window glass through a gear, wherein first ratchet teeth are radially formed on an end surface of the drum, and the second gear is formed. A second ratchet tooth meshing with the first ratchet tooth is formed on a side surface of the driving device. 2. The housing according to claim 1, wherein the housing comprises a main body and a lid, wherein the main body has a first chamber for accommodating the drive shaft and a second chamber for accommodating the drum. Item 2. The driving device according to Item 1. 3. The drive device according to claim 1, wherein a spring case for housing the spiral spring is provided on an outer periphery of the drive shaft.