JPH1193507A - Rotary drive mechanism of pinion in window regulator for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence abnormal sound by enlarging and deforming a coil spring when an opening torque for a window glass is input from a pinion side. SOLUTION: First and second notches 11a, 11b are formed in a drum 11 and first and second engaging parts 12a, 12b are bent and formed in a support 12. When an opening torque for a window glass is input from a pinion 6 side, the side edge b of the second engaging part 12b of the support 12 comes into contact with the side edge b of the second notch 11b of the drum 11. Then, both side edges a, b of the first engaging part 12a do not come into contact with the bends 13a, 13b of a coil spring 13 and hence, a braking action is not generated between the coil spring 13 and the inner peripheral face of the cover. In this way, abnormal sound is prevented on opening the window glass and the whole parts for manual operation and power window regulators except the support 12 can be used in common and hence, it is resulted in costdown.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinion rotation drive mechanism for a vehicle window regulator.

[0002]

2. Description of the Related Art As a vehicle window regulator, for example, as shown in FIG. 1, a main arm 1 having a gear 2 attached to a base and a roller 8 attached to a tip end thereof,
And the rollers 9 and 9 'at both ends.
And a base plate 4 having a main arm 1 fixed to a door inner panel.
And the rollers 8 and 9 are fitted into the guide rails 7 provided on the lower edge of the window glass, and the rollers 9 'are fitted into the guide rails 7' fixed to the door inner panel. By rotating the assembled pinion 6, the main arm 1 swings up and down around the shaft 5 via the gear 2 meshing with the pinion 6, and the sub-arm 3 swings up and down with the gear, thereby turning the window glass. A so-called X-arm type window regulator which is moved up and down is generally used.

A so-called single-arm window regulator in which the sub-arm 3 and the guide rail 7 'are omitted from the X-arm window regulator and the window glass is raised and lowered only by vertically swinging the main arm 1 is also known. It has been generally used conventionally.

[0005] In the above description, the rotation drive mechanism of the pinion 6 conventionally comprises a drive shaft 10 integrally connected to a drum 11 and an engaging portion 12a integrally connected to the pinion 6, as shown in FIG. A bent support 12 and a coil spring 13 wound around the drum 11
And a cover 14 for assembling them. A notch is provided on one side of the drum 11, and the coil spring 13 has both ends bent at the notch 1 of the drum 11.
1a is wound around the outer periphery of the drum 11 in a state of being engaged with both side edges, and a pinion 6 is
And the engaging portion 12a of the support 12 is positioned in the notch 11a of the drum 11, and these are assembled into the cover 14 in this state. The two sides of the notch 11a of the drum 11 and the coil spring 1
3 and between the both bent portions of the coil spring 13 and both side edges of the engaging portion 12a of the support 12, there is a play. 4 so that the pinion 6 is engaged with the gear 2 of the main arm 1.

When the drive shaft 10 is rotated by rotating the handle or rotating the electric motor, the drive shaft 10 and the drum 11 integrated therewith are rotated. However, first, one side edge of the notch 11a pushes one of the bent portions of both ends of the coil spring 13 in the direction in which the coil is wound, so that the coil spring 13 is tightened and the coil diameter becomes small. The outer periphery of the coil spring 13 and the cover 1
Friction between the inner peripheral wall of the support 4 and the inner peripheral wall of the support 4 is reduced. In this state, the engaging portion 12a of the support 12 is pushed, the pinion 6 is driven to rotate via the support 12, and the window glass can be raised and lowered.

Conversely, with respect to the load (rotational force) such as the weight load of the window glass and vehicle vibration input from the pinion 6 side.
First, the engaging portion 12a of the support 12 is
3 is pressed in the direction of expanding the coil diameter, so that the outer periphery of the coil spring 13 and the cover 14 are pressed.
The friction between the pinion 6 and the inner peripheral wall increases, and the rotation of the pinion 6 is prevented by the braking function.

[0007]

The above-described mechanism for preventing the pinion from reversing by the coil spring 13 is used in a window regulator manually operated by a handle.
This is necessary to keep the windowpane in the fully closed state or the half-opened state from slipping and moving due to the weight load of the windowpane itself and vehicle vibration while the vehicle is running.

However, in a power window regulator that opens and closes a window glass by driving an electric motor,
Since a speed reducer composed of a worm gear mechanism or the like has a function of locking the rotation of the pinion 6 with respect to the load input from the window glass side, the mechanism for preventing the pinion from reversing by the coil spring 13 is unnecessary. In order to reduce the cost by sharing the parts of the window regulator and the power window regulator, the power window regulator uses exactly the same as a manually operated window regulator having a pinion reversal prevention mechanism by the coil spring 13. is the current situation.

However, in a power window regulator equipped with the above-described pinion reverse rotation preventing mechanism, when the window glass is opened from the fully closed state, abnormal noise may be generated. have.

When the cause of the generation of abnormal noise was investigated, the following was found.

That is, when the window glass is closed and the window glass is fully closed and an overtorque in the closing direction is input from the electric motor, the overtorque causes bending of the arm, the door inner panel, etc., and the overtorque is released. The support force of the deflection of the arm and inner panel
The rotation of the arm, the inner panel, and the like is maintained in a bent state by being input to the one end bent portion of the coil spring 13 through the coil spring 13 whose diameter has been increased. Next, when the electric motor is driven in the opening direction to open the window glass, the engaging portion 1 of the support 12 is opened.
When 2a separates from the one-end bent portion of the coil spring 13 and the reverse rotation preventing function is released, the reaction force of the bending of the arm or the door inner panel is suddenly released at that moment, and the arm or the door inner panel is released. It was found that the sudden return of the bending caused abnormal noise.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the occurrence of the above-mentioned abnormal noise without significantly impairing the advantage of cost reduction by sharing parts between a manually operated window regulator and a power window regulator. is there.

[0013]

SUMMARY OF THE INVENTION The present invention relates to a drum integrally fitted and connected to a drive shaft, a support integrally fitted and connected to a pinion, and a coil wound around the outer periphery of the drum. In a pinion rotation drive mechanism including a spring, a first notch portion and a second notch portion are provided on a drum, and a first engagement portion and a second engagement portion are bent and formed on a support. The spring is assembled with the bent portions at both ends engaged with both side edges of the first notch of the drum, and the support is formed by the first engagement portion and the second engagement portion of the first notch of the drum. Assembled in a state where it is located in the notch and the second notch, respectively, and when a rotational force is input from the drive side shaft,
After one side edge of the first notch of the drum presses one bent portion of the coil spring to reduce the diameter of the coil spring, one side edge of the second notch is the second side of the support.
When one side edge of the engaging portion is pressed and rotated, and a rotational force in the window glass opening direction is input from the pinion side, the first engaging portion of the support contacts the bent portions at both ends of the coil spring. One side edge of the second engagement portion of the support presses and rotates one side edge of the second notch portion of the drum in a state where the support is not in contact with the support, and the rotational force in the window glass closing direction from the pinion side. Is input, one side edge of the first engagement portion of the support presses one bent portion of the coil spring to expand and deform the coil spring. This is to increase the friction between the surface and the surface.

As described above, the arm or the door inner panel is bent by the over torque of the power unit when the window glass is closed, and when the bending reaction force is held on the pinion, the next window glass is opened. In operation,
The held bending reaction force is not suddenly released at one time, and the bending reaction force is gradually released as the power unit is driven in the opening direction, so that no abnormal noise is generated. In addition, a support for manual operation having only the first engagement portion without the second engagement portion is prepared, and by simply replacing the support, the rotational force from the pinion side to the windowpane opening direction is obtained. When the input is made, it is possible to easily obtain a pinion rotation drive mechanism for manual operation that prevents the reverse rotation by expanding and deforming the coil spring, and all parts other than the above support can be shared, so that cost reduction by sharing parts Almost no loss of benefits.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 shows an example of a rotation drive mechanism of the pinion 6 according to the present invention. The drive shaft 10, a drum 11 integrally fitted to the drive shaft 10 and a pinion 6 are shown. A support 12 integrally fitted to the drum 11, a coil spring 13 wound around the outer periphery of the drum 11, and a cover fixed to the base plate 4 to mount the drum 11, the support 12, the coil spring 13 and the like. 14 constitutes a rotation drive mechanism of the pinion 6 in the same manner as the conventional pinion rotation drive mechanism shown in FIG. The drive shaft 10 is driven to rotate by a conventionally known power unit (not shown) including an electric motor and a speed reducer.

The difference from the conventional configuration is that the drum 11 is provided with a first notch 11a and a second notch 11b, and the support 12 is provided with a first notch 12a and a second notch 12b. Is formed by bending the first notch 1 of the drum 11.
1a, both end bent portions 13 of the coil spring 13
a and 13b are engaged with each other, the coil spring 13 is wound around the outer periphery of the drum 11, and the first engagement portion 12a and the second engagement portion 12b of the support 12 are connected to the first engagement portion of the drum 11. The support 12 is mounted on the drum 11 while being positioned in the notch 11a and the second notch 11b, respectively.

When a rotational force is input from the drive shaft 10 and a leftward (counterclockwise) rotational force is input as shown in FIG.
1a presses one bent portion 13a of the coil spring 13 in a counterclockwise direction.
After reducing the friction between the coil spring 13 and the inner peripheral surface of the cover 14, one side edge a of the second notch 11 b of the drum 11 is connected to the second engagement portion 12 b of the support 12. By contacting one side edge a and pressing it in a counterclockwise direction, the support 12 and the pinion 6 integrally connected thereto are rotated, and the main arm is rotated via the gear 2 meshed with the pinion 6. 1 is rotated around the axis 5 to open the window glass.

As shown in FIG. 3B, the drive side shaft 10
When a rightward (clockwise) rotational force is input from the other side, the other side edge b of the first cutout portion 11a of the drum 11 presses the other bent portion 13b of the coil spring 13 in the clockwise direction. 13 and the coil spring 1
After the friction between the third notch 3 and the inner peripheral surface of the cover 14 is reduced, the other side edge b of the second notch portion 11b of the drum 11 is connected to the other side edge b of the second engagement portion 12b of the support 12. By contacting and pressing in the clockwise direction, the pinion 6 is rotated via the support 12, the main arm 1 is rotated about the shaft 5 via the gear 2, and the window glass is closed.

When, for example, a weight load of a window glass, a vibration load of a vehicle, or the like is input from the pinion 6 as a rotational force, if the counterclockwise rotation (counterclockwise) as shown in FIG. Other side edge b of the second engagement portion 12b
Abuts against the other side edge b of the second notch 11b of the drum 11 and presses it counterclockwise. At this time, the first engaging portion 12a of the support 12 has both side edges separated from the bent portions 13a and 13b at both ends of the coil spring 13 so that the diameter of the coil spring 13 is not increased. There is no increase in friction with the cover 14, so that the other side edge b of the second notch 11b is pressed counterclockwise by the other side edge b of the second engagement portion 12b, The drive-side shaft 10 is about to be rotated counterclockwise via the drum 11, but the rotation of the drive-side shaft 10 is provided by a power unit speed reducer (usually constituted by a worm gear mechanism) not shown. The window glass is locked by the reverse rotation prevention function, and the window glass does not move downward due to its own weight load or the vibration load of the vehicle.

As shown in FIG. 3D, when a rightward (clockwise) rotational force is input from the pinion 6 side, one side edge a of the first engagement portion 12a of the support 12 is connected to the coil spring. 13, one of the bent portions 13a is pressed in a clockwise direction to expand the coil spring 13 so that the friction between the coil spring 13 and the inner peripheral surface of the cover 14 is increased. The clockwise rotation force input from the pinion side is locked, and the windowpane does not move upward due to vibration of the vehicle or the like. In this case, one side edge a of the first engagement portion 12 a of the support 12 is connected to one of the bent portions 13 of the coil spring 13.
a, the side edges a, b of the second engagement portion 12b of the support 12 are located at positions away from the side edges a, b of the second notch 11b of the drum 11. hand,
The transmission of the rotational force from the second engagement portion 12b to the drum 11 is not performed.

As described above, when at least the rotational force in the direction of opening the window glass is input from the pinion 6 side, FIG.
As shown in (C), the second engagement portion 12 of the support 12
b is the side edge b of the second notch 11b of the drum 11.
, The both side edges a and b of the first engagement portion 12a are both bent portions 13a and 1b of the coil spring 13.
3b, no noise is generated when the window glass is opened by a configuration in which a braking action is not generated between the coil spring 13 and the inner peripheral surface of the cover.

That is, when the window glass is closed and the window glass is fully closed, and an overtorque in the closing direction is input from the electric motor, the overtorque causes bending of the arm and the door inner panel, and the reaction force of the bending is reduced. When the power unit is held by the gear mechanism of the speed reducer and then the power unit is driven in the opening direction to open the window glass, the bending reaction force of the held arms and the door inner panel is temporarily reduced. Since the bending reaction force is not released suddenly and the bending reaction force is gradually released as the power unit is driven in the opening direction, no abnormal noise is generated.

When the above-described pinion rotation drive mechanism is applied to a manually operated window regulator, as shown in FIG. 4, the first engagement portion 11a does not have the second engagement portion 11b.
A manual support 12 'having only a bent portion is prepared, and the manual support 12' is used in place of the power window regulator support 12 shown in FIGS. When a force is input, the coil spring 13 is reduced in diameter, and when a rotational force is input from the pinion side, the coil spring 13 is expanded and deformed to increase friction between the coil spring 13 and the inner peripheral surface of the cover 14. The conventional function of preventing reverse rotation can be provided.

The pinion rotation drive mechanism of the present invention is not limited to the X-arm type window regulator as shown in FIG. 1, but can be applied as a pinion rotation drive mechanism for any other type of window regulator such as a single arm type. is there.

[0026]

As described above, according to the present invention, the first support is formed by bending only the first engagement portion.
A support for the power window regulator in which the engagement portion and the second engagement portion are bent is prepared, and the above two types of supports are appropriately selected and used between the window regulator for manual operation and the power window regulator. The power window regulator can completely prevent abnormal noise that could be generated when the window glass is opened, and all of the above support insulator parts are manually operated. This can be used for both the power window regulator and the power window regulator, which can bring about a great effect in practical use, in combination with the fact that the advantage of cost reduction by sharing parts is hardly impaired.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a window regulator to which the present invention is applied.

FIG. 2, showing an embodiment of the present invention, is a longitudinal side view of a pinion rotation drive mechanism for a power window regulator.

3A is a front view showing an operation state of the pinion rotation drive mechanism shown in FIG. 2, wherein FIG. 3A shows a case where a leftward rotation force is input from a drive shaft, and FIG. 3B shows a right rotation from a drive shaft. (C) shows a case where a leftward rotation force is input from the pinion side, and (D) shows a case where a rightward rotation force is input from the pinion side.

4A and 4B show an example of a pinion rotation drive mechanism of a window regulator for manual operation, in which FIG. 4A is a longitudinal sectional side view of a pinion rotation drive mechanism, and FIGS. 4B and 4C are operations of the pinion rotation drive mechanism. It is a front view showing a state, (B)
Indicates that when a rotational force in the left rotation direction is input from the pinion side,
(C) shows the case where the rotational force in the right rotation direction is input from the pinion side.

FIG. 5 is an exploded perspective view showing an example of a conventional pinion rotation drive mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main arm 2 Gear 3 Sub arm 4 Base plate 5 Axis 6 Pinion 7, 7 'Guide rail 8 Roller 9, 9' Roller 10 Driving shaft 11 Drum 11a First cutout 11b Second cutout 12 Support 12a First Engaging part 12b Second engaging part 13 Coil spring 14 Cover

Claims (2)

[Claims] At least a pinion and an arm having a gear meshing with the pinion are rotatably mounted on a base plate, and the pinion is rotationally driven so that the arm swings up and down to open and close a window glass. In the above-described vehicle window regulator, the rotation drive mechanism of the pinion includes a drive shaft, a first cutout portion and a second cutout portion which are integrally fitted and coupled to the drive shaft, and are provided on the outer periphery. A support having a first engagement portion and a second engagement portion formed on the outer peripheral portion by bending and fitting integrally with the pinion; A coil spring wound around the outer periphery of the drum in a state of being engaged with both side edges of the notch portion, and a cover for assembling the drum, the support and the coil spring. The port is assembled to the drum in a state where the first engagement portion and the second engagement portion are located in the first notch and the second notch, respectively, and when a rotational force is input from the drive side shaft, After one side edge of the first notch of the drum presses one bent portion of the coil spring to reduce the diameter of the coil spring, one side edge of the second notch is the second side of the support. When one side edge of the engaging portion is pressed and rotated, and a rotational force in the window glass opening direction is input from the pinion side, the first engaging portion of the support contacts the bent portions at both ends of the coil spring. One side edge of the second engagement portion of the support presses and rotates one side edge of the second notch portion of the drum in a state where the support is not in contact with the support, and the rotational force in the window glass closing direction from the pinion side. Is input, one side edge of the first engagement portion of the support is A wind regulator for a vehicle, wherein the friction between the coil spring and the inner peripheral surface of the cover is increased by pressing one bent portion to expand and deform the coil spring. Pinion rotation drive mechanism. 2. The pinion rotation drive mechanism for a vehicle window regulator according to claim 1, wherein the drive shaft is rotatably driven by a power unit including an electric motor and a speed reducer. Pinion rotation drive mechanism for vehicle window regulators.