JPH05178168A - Wiper driving motor - Google Patents

Abstract

PURPOSE:To obtain a wiper driving motor that is capable of intermittently operating a wiper with simple construction and low cost and whose degree of freedom in selection of an applicable place is high. CONSTITUTION:Movable contact points 58, 60 are provided on a cam plate 28 mounted in the vicinity of a rotary gear wheel 12, and constitute an electric circuit for intermittent rotation together with an A contact lever 68, etc. The cam plate 28 is pressed by the projection 26 of the rotary gear wheel 12 and forcibly moved at a specified turning position. And, a tension spring 40 is connected to the cam plate 28, and, at the same time, a damper 44 is also engaged with it. When the cam plat 28 is moved by the projection 26, electricity connection to a motor part 10A is stopped. The cam plate 28 gradually (slowly) returns to its original position by the action of the tension spring 40 and the damper 44, and this returning time becomes the stopping time in the intermittent rotation of a motor, therefore, application range of this wiper driving motor also expands at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper drive motor for operating a vehicle wiper in response to an operation of a wiper switch, and more particularly to a wiper drive motor capable of operating the wiper intermittently.

[0002]

2. Description of the Related Art In a wiper drive motor for operating a vehicle wiper, a worm gear is formed on a motor rotating shaft, and a gear wheel is meshed with the worm gear. Further, a crank arm for driving the wiper is connected to the rotary shaft of the gear wheel, whereby the rotation of the motor rotary shaft is transmitted to the crank arm for rotation.

When the wiper is operated intermittently by such a motor, it is necessary to rotate the motor intermittently. For this reason, conventionally, the motor is intermittently rotated by providing the motor drive power source control relay and its operation time setting circuit (controller) separately from the motor or by incorporating the relay in the motor. That is, the relay is turned ON / OFF every set time.
Thus, the power supply to the motor is switched, the motor is intermittently rotated every predetermined time, and the wiper is intermittently operated.

[0004]

However, in the case of intermittently operating the wiper with the above-mentioned structure, the motor intermittent rotation relay and the operation time setting circuit are expensive, and further the electrical wiring connection work is required. Since it is complicated, there is a drawback that the cost becomes high as a whole.

Further, the relay contacts arranged in such a relay are used when the wiper is intermittently operated (when the motor is intermittently rotated).
Since "contact" and "disconnection" are repeated many times,
It had low durability (short life) and was a cause of noise. Further, a large-capacity motor for the front wind wiper needs to use a large-capacity relay, and the degree of freedom in selecting an application point is low (for example, it can be used only for the rear wind wiper). ..

In consideration of the above facts, the present invention has an object to obtain a wiper drive motor which has a simple structure and can operate the wiper intermittently at a low cost, and which has a high degree of freedom in selecting an application site. is there.

[0007]

A wiper drive motor according to a first aspect of the present invention is a wiper drive motor for operating a wiper in response to an operation of a wiper switch having an intermittent mode, the motor rotating shaft. A rotary gear wheel that rotates together with the wiper, a plate member that is movably supported near the rotary gear wheel, and the plate that rotates with the rotary gear wheel at a predetermined rotational position of the rotary gear wheel. An operating means for pressing and moving the member, a delaying means for returning the plate member moved by the operating means to the original position after a predetermined time has passed, the rotary gear wheel and the plate member, When the intermittent mode of the wiper switch is selected, movement of the plate member by the actuating means causes a connection state. There stops the power supply to the changed motor, and is characterized by comprising a contact which constitutes an electric circuit for supplying power to the motor by the return of the plate member by the lagged section.

A wiper drive motor according to a second aspect of the present invention is the wiper drive motor according to the first aspect of the present invention, wherein the actuating means directs one of the rotary gear wheel and the plate member toward the other. And a contact portion formed corresponding to the protrusion on the other side, and the protrusion and the contact portion are in contact with each other when the rotary gear wheel rotates. In that case, the plate member is moved together with the rotary gear wheel.

A wiper drive motor according to a third aspect of the present invention is the wiper drive motor according to the first or second aspect of the present invention, wherein the delay means is connected to the plate member and the plate member is at a reference position. It is characterized by including an elastic body that constantly urges in the direction of, and a damper that engages with the plate member and dissipates the urging force of the elastic body.

A wiper drive motor according to a fourth aspect of the present invention is a wiper drive motor for actuating a wiper in response to an operation of a wiper switch having an intermittent mode. The wiper drive motor rotates together with a motor rotating shaft to connect the wiper. Rotary gear wheel, a cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel, a cam plate rotatably supported in the vicinity of the rotary gear wheel, and a predetermined rotary gear wheel An operating means for pressing and rotating the cam plate in accordance with the rotation of the rotary gear wheel in the rotational position, and one end fixed to the cover and the other end extending toward the rotary gear wheel and the cam plate. The fixed contact is integrally provided on the surface of the rotary gear wheel on the fixed contact side, and abuts on the fixed contact to form the fixed contact. Therefore, the pattern-shaped first moving contact for forming an electric circuit corresponding to the wiper switch and the fixed contact-side surface of the cam plate are integrally provided, and contact the fixed contact to fix the fixed contact and The pattern-shaped second moving contact for forming an electric circuit corresponding to the wiper switch by the first moving contact and the cam plate rotated by the actuating means are moved to their original positions after a predetermined time has elapsed. And a delaying means for returning to.

A wiper drive motor according to a fifth aspect of the present invention is a wiper drive motor for actuating a wiper in response to an operation of a wiper switch having an intermittent mode, the wiper drive motor rotating together with a motor rotating shaft to connect the wiper. Rotary gear wheel, a cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel, a cam plate that is coaxial with the rotary gear wheel and is relatively rotatable, and the rotary gear wheel An operating means for pressing and rotating the cam plate with the rotation of the rotary gear wheel at a predetermined rotational position of the rotary gear wheel, and integrally provided on the cam plate side surface of the rotary gear wheel,
A pattern-shaped first moving contact for forming an electric circuit corresponding to the wiper switch, one end of which is fixed to the cam plate and the other end of which extends toward the rotary gear wheel, A second moving contact for contacting the moving contact of the second moving contact for forming an electric circuit corresponding to the wiper switch with the first moving contact, and the cam plate rotated by the operating means for a predetermined time. And a delaying means for returning to the original position later.

A wiper drive motor according to a sixth aspect of the present invention is a wiper drive motor for actuating a wiper in response to an operation of a wiper switch having an intermittent mode, the wiper drive motor rotating together with a motor rotating shaft to connect the wiper. Rotary gear wheel, a cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel, a slider that is slidably arranged in the vicinity of the rotary gear wheel, and a predetermined portion of the rotary gear wheel. Actuating means for pressing and sliding the slider in accordance with the rotation of the rotary gear wheel in the rotational position, and one end fixed to the cover and the other end fixed toward the rotary gear wheel and the slider. The contact and the surface of the rotary gear wheel on the fixed contact side are integrally provided and contact the fixed contact. The pattern-shaped first moving contact for forming an electric circuit corresponding to the wiper switch by the constant contact and the fixed contact side surface of the slider are integrally provided, and abut on and fixed to the fixed contact. The pattern-shaped second moving contact for forming an electric circuit corresponding to the wiper switch by the contact and the first moving contact, and the slider slid by the actuating means are restored after a predetermined time has elapsed. And a delaying means for returning to the position.

[0013]

In the wiper drive motor according to the present invention, when the intermittent mode of the wiper switch is selected and the wiper is operated intermittently, that is, when the motor rotates intermittently, the rotary gear wheel rotates to a predetermined rotational position. When it reaches, the plate member is pressed by the actuating means and is moved as the rotary gear wheel rotates. Therefore, the connection state of the contacts forming the electric circuit corresponding to the wiper switch is changed, and the power supply to the motor is automatically stopped temporarily.

After a lapse of a predetermined time, the plate member is returned to the original position again by the retarding means, the connection state of the contacts becomes the original state, and the power supply to the motor is automatically restarted. After that, this is sequentially repeated.

Thus, the motor automatically and intermittently rotates according to the wiper switch without using other parts such as a motor controller.

In the wiper drive motor according to the second aspect of the invention, when the rotary gear wheel rotates and reaches a predetermined rotational position, the projection constituting the actuating means engages with the abutting portion and presses the abutting portion. Move the member with the rotating gear wheel. For this reason, the contact forming the electric circuit corresponding to the wipe pass switch is moved together with the plate member to change the contact position.

As described above, since the plate member is moved by the protrusion and the abutting portion, the structure is simple and the power supply to the motor can be surely stopped, and other parts such as a motor controller are used. Without this, the wiper switch can be automatically and intermittently rotated.

In the wiper drive motor according to the third aspect of the invention, when the plate member is moved in accordance with the rotation of the rotary gear wheel, the urging force (energy) is temporarily accumulated in the elastic body, so that the plate member is originally formed. Trying to return to the position. Here, the accumulated biasing force is gradually dissipated by the damper, whereby the plate member is gradually returned to the original position. When the plate member returns to the original position, the motor is again energized. After that, this is sequentially repeated.

In this way, the recovery time of the plate member, that is, the time for resuming energization to the motor can be set with a simple structure of the elastic body and the damper, and the automatic operation is possible without using other parts such as the motor controller. It can be intermittently rotated.

In the wiper drive motor according to the fourth aspect, when the wiper is intermittently operated, that is, when the motor is intermittently rotated, when the rotary gear wheel reaches a predetermined rotation position, the cam is driven by the operating means. The plate is pressed and rotated as the rotary gear wheel rotates. Therefore, the second circuit that constitutes an electric circuit corresponding to the wiper switch
Moving contact moves with the cam plate, thereby changing the contact position with the fixed contact, and automatically stopping the energization of the motor temporarily.

After a lapse of a predetermined time, the cam plate is returned to the original position again by the delaying means, the second moving contact moves together with the cam plate, and the contact position with the fixed contact becomes the original state, and the automatic position is automatically restored. The power supply to the motor is restarted. After that, this is sequentially repeated.

As described above, the motor automatically and intermittently rotates according to the wiper switch without using other parts such as a motor controller.

In the wiper drive motor according to the fifth aspect, when the wiper is intermittently operated, that is, when the motor is intermittently rotated, when the rotary gear wheel reaches a predetermined rotation position, the cam is driven by the operating means. The plate is pressed and rotated as the rotary gear wheel rotates. Therefore, the second circuit that constitutes an electric circuit corresponding to the wiper switch
Moving contact moves with the cam plate, whereby the contact position with the first moving contact is changed, and the power supply to the motor is automatically stopped temporarily.

After a lapse of a predetermined time, the cam plate is returned to the original position again by the retarding means, the second moving contact moves together with the cam plate, and the contact position with the first moving contact is in the original state. Then, the power supply to the motor is automatically restarted. After that, this is sequentially repeated.

Thus, the motor automatically and intermittently rotates according to the wiper switch without using other parts such as a motor controller.

In the wiper drive motor according to the sixth aspect, when the wiper is intermittently operated, that is, when the motor is intermittently rotated, when the rotary gear wheel reaches a predetermined rotational position, the slider is operated by the operating means. Is pressed and is slid along with the rotation of the rotary gear wheel. Therefore, the second moving contact forming the electric circuit corresponding to the wiper switch moves together with the slider, thereby changing the contact position with the fixed contact and automatically stopping the energization of the motor temporarily. ..

When the predetermined time has passed, the slider is returned to the original position again by the delaying means, the second moving contact moves together with the slider, and the contact position with the fixed contact returns to the original position, so that the slider automatically moves. Power supply to the motor is restarted. After that, this is sequentially repeated.

Thus, the motor automatically and intermittently rotates according to the wiper switch without using other parts such as a motor controller.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall construction of a wiper driving motor 10 according to a first embodiment of the present invention. Further, FIG. 2 shows an overall perspective view of the motor 10, and FIG. 3 shows an exploded perspective view of a main part of the motor 10.

The motor 10 is composed of a motor portion 10A and a gear portion 10B connected to the motor portion 10A. The rotation shaft of the motor unit 10A extends into the gear unit 10B, and a worm gear (not shown) is formed at the tip. The worm gear meshes with the rotary gear wheel 12 arranged in the gear portion 10B.

The rotary gear wheel 12 is rotatably supported by a cover 14 of the gear portion 10B, and a crank arm 18 is connected to a tip portion of a shaft 16. Therefore, when the motor unit 10A operates to rotate the rotating shaft, this rotating force is transmitted to the rotating gear wheel 12 via the worm gear.
Is transmitted to the rotary gear wheel 12, and the crank arm 18 is rotated around the shaft 16 accordingly.

As shown in detail in FIGS. 1 and 3, a moving contact 20 as a first moving contact is provided on the surface of the rotary gear wheel 12 on the cover 14 side. Moving contact 20
Has a ring shape (pattern shape) and is integrally formed with the rotary gear wheel 12, and rotates together with the rotary gear wheel 12.

A projecting portion 22 is formed on the inner peripheral side of the moving contact 20 so as to project inward in the radial direction, and the outer peripheral side corresponding to the projecting portion 22 is cut out over a predetermined range in the circumferential direction. 24 is formed (in other words, a part of the moving contact 20 is missing in the cutout portion 24). The moving contact 20 constitutes an electric circuit corresponding to the wiper switch 76 (see FIG. 6) with fixed contacts (+ contact lever 62, S contact lever 64, G contact lever 66) described later.

Further, the rotary gear wheel 12 is formed with a projection 26 which constitutes an operating means in the vicinity of the notch 24 so as to project.

On the other hand, in the vicinity of the rotary gear wheel 12,
A cam plate 28 is arranged. Cam plate 28
Are formed in a substantially circular shape, and are rotatably supported by a support shaft 32 protruding from the housing 30. At one end of the cam plate 28, an abutting portion 34 which is convex toward the rotary gear wheel 12 and constitutes an operating means is formed, and is engageable with the protrusion 26. That is, the protrusion 2
6 is in contact with the contact portion 34, the rotary gear wheel 12
Is rotated, the cam plate 28 is pressed and the support shaft 32
It is configured to rotate around forcibly.

An arc-shaped through hole 36 is formed in the vicinity of the contact portion 34 of the cam plate 28.
A guide pin 38 protruding from the housing 30 is movably inserted therein. Therefore, the cam plate 2
8 can be rotated only in the range in which the guide pin 38 moves from one end of the through hole 36 to the other end.

One end of a tension spring 40 as an elastic body is connected near the through hole 36 of the cam plate 28, and the other end of the tension spring 40 is connected to the housing 30. As a result, the cam plate 28 is always urged in the direction in which the contact portion 34 approaches the rotary gear wheel 12, and normally, the contact portion 34 is normally rotated by the contact portion 34.
The guide pin 38 is located at one end of the through hole 36 (upper end in FIG. 1) while being located on the movement locus of the protrusion 26.

A gear portion 42 is formed on a side wall of the cam plate 28 on the side of the through hole 36, and a damper 44 meshes with the gear portion 42. As shown in FIG. 4, the damper 44 has a structure in which the shaft 50 of the pinion 48 is supported by the case 46, and the pinion 48 meshes with the gear portion 42 of the cam plate 28. Therefore, when the cam plate 28 rotates around the support shaft 32, the pinion 48 of the damper 44 also rotates. The shaft 50 located in the case 46 of the damper 44 has a small hole 5
A pair of wings 54 formed with 2 are integrally fixed to each other, and silicone oil 56 is enclosed in the case 46. Therefore, by rotating the blade 54 together with the shaft 50 in the silicon oil 56, the rotational force (energy) transmitted through the pinion 48 can be dissipated (in other words, the rotational force can be attenuated). it can).

On the surface of the cam plate 28 having the above-mentioned structure on the cover 14 side, the moving contact 5 as the second moving contact is formed.
8 and a moving contact 60 are provided. The moving contact 58 and the moving contact 60 are, like the moving contact 20, formed integrally with the cam plate 28 in a pattern and rotate together with the cam plate 28. One moving contact 58 corresponds to a fixed contact (A contact lever 68, B contact lever 70) described later, and the other moving contact 60 is similarly fixed contact (C contact lever 7) described later.
2, D contact lever 74), and each constitutes an electric circuit corresponding to the wiper switch 76.

Between the rotary gear wheel 12 (moving contact 20) and the cover 14, three contact levers as fixed contacts, that is, + contact lever 62, S contact lever 64 and G contact lever 66 are arranged. ing. As shown in FIG. 5, one end of each contact lever is fixed to the inner peripheral wall of the cover 14, the other end extends toward the rotary gear wheel 12 and the tip thereof moves to the moving contact 20 (or the rotary gear wheel 12). Of the surface).

Further, the cam plate 28 (moving contact 5
8, 60) and the cover 14 are similarly provided with four contact levers as fixed contacts, that is, A contact lever 68, B contact lever 70, C contact lever 72 and D contact lever 74. There is. Similar to the contact lever, each contact lever has one end fixed to the inner peripheral wall of the cover 14,
The other end extends in the direction of the cam plate 28, and the tip is in contact with the moving contacts 58, 60 (or the surface of the cam plate 28).

Next, the structure of the electric circuit will be described. FIG. 6 shows an overall schematic configuration diagram including the wiper switch 76, and FIGS. 7 to 12 show the connection state of each contact lever.

The + contact lever 62 is connected to the power source + side via the wiper switch 76, and the tip end thereof can come into contact with the moving contact 20 of the rotary gear wheel 12 (in other words, the notch 24 is provided). Corresponding, it will be in a non-contact state at this position). The S contact lever 64 is
Through the wiper switch 76, the motor 10 (the motor unit 10
It is connected to the LOW terminal 78 of A), and the tip portion is always in contact with the moving contact 20. G contact lever 66
Is connected to the B contact lever 70, and the tip end thereof can come into contact with the protrusion 22 of the moving contact 20 (in other words, it corresponds to the protrusion 22 and contacts with the protrusion 22 only at this position. State).

On the other hand, the A contact lever 68 is grounded and its tip can contact the moving contact 58 of the cam plate 28. The B contact lever 70 is
It is connected to the above-mentioned G contact lever 66, and the tip end thereof can contact the moving contact 58. The C contact lever 72 is connected to the LOW terminal 78 of the motor unit 10A, and the tip end thereof can come into contact with the moving contact 60. The D contact lever 74 is powered by the wiper switch 76.
Is connected to the side, and the tip portion is always in contact with the moving contact 60.

Here, the wiper switch 7 shown in FIG.
6 indicates that the connection line in the portion corresponding to the “◯” mark is closed. For example, when the wiper switch 76 is set to the “LOW” position, the + connection line (terminal) and L
It shows that the OW connection line (terminal) is closed.

Next, the operation of this embodiment will be described. 7 to 12 show the operating states of the moving contact 20, the protrusion 26, the cam plate 28, the moving contacts 58, 60, etc. of the rotary gear wheel 12 when the motor 10 rotates intermittently.

In FIG. 7, the wiper switch 76 is "INT".
The state is shown in which the motor 10 (motor unit 10A) is switched to the position and stopped by the dynamic braking. In this state, the projection 26 of the rotary gear wheel 12 abuts against the abutment portion 34 and presses the abutment portion 34, whereby the cam plate 28 is supported by the support shaft 32.
Since it is forcibly rotated around, the C contact lever 72 is separated from the moving contact 60 and is in a non-contact state. The A contact lever 68 and the B contact lever 70 are both in contact with the moving contact 58.
Further, the G contact lever 66 is in contact with the protruding portion 22 of the moving contact 20. Therefore, L of the motor unit 10A
The OW terminal 78 includes the S contact lever 64 and the moving contact 2
0, G contact lever 66, B contact lever 7
0, the moving contact 58 and the A contact lever 68 are grounded. Therefore, the motor unit 10
A is in a stopped state.

When the motor 10 is stopped by this dynamic braking, the tension spring 40 connected to the cam plate 28 is expanded by forcibly rotating the cam plate 28 around the support shaft 32. The cam plate 28 is biased.

Then, as shown in FIG. 8, the cam plate 28 starts to rotate around the support shaft 32 to the original position by the urging force of the tension spring 40. Here, the cam plate 28
Is rotated around the support shaft 32, the pinion 4 of the damper 44 is rotated.
8 is also rotated. Since the blades 54 are fixed inside the damper 44 and the silicone oil 56 is enclosed, the shaft 5
When the blade 54 rotates in the silicone oil 56 together with 0, the rotational force (energy) transmitted through the pinion 48 is dissipated. Therefore, the cam plate 28 gradually (slowly) moves to the original position.

When the cam plate 28 reaches the original position completely (the guide pin 38 comes into contact with the end of the through hole 36), as shown in FIG.
The contact levers 70 are both separated from the moving contact 58 and are in a non-contact state. At approximately the same time, the C contact lever 72 contacts the moving contact 60 and is connected to the D contact lever 74 via the moving contact 60. Therefore, the power supply + side is connected to the LOW terminal 78 of the motor unit 10A via the D contact lever 74, the moving contact 60, and the C contact lever 72, and the LOW terminal 7
8 is in the "+" state. At this point, the moving contact 2
The G contact lever 66 connected to the S contact lever 64 via 0 is grounded because the A contact lever 68 and the B contact lever 70 are both separated from the moving contact 58 and are not connected to each other. No shortage, no short circuit.

Therefore, the motor section 10A starts to operate,
The rotary gear wheel 12 together with the crank arm 18 is shown in FIG.
Starts to rotate in the clockwise direction (arrow CW direction). Therefore, the wiper is also activated.

As shown in FIG. 10, when the protrusion 26 of the rotary gear wheel 12 contacts the contact portion 34 of the cam plate 28 after the motor portion 10A (rotary gear wheel 12) continues to rotate, the protrusion 26 contacts. The portion 34 is pressed to forcibly rotate the cam plate 28 around the support shaft 32. Therefore, the C contact lever 72 is separated from the moving contact 60 to be in a non-contact state, and the connection with the D contact lever 74 (that is, the power source + side) is released (the state shown in FIG. 11). However, at this point of time, the + contact lever 62 is still in contact with the moving contact 20, so that the LOW terminal 78 of the motor unit 10A passes through the S contact lever 64, the moving contact 20 and the + contact lever 62. Power supply + side is still connected, and L
The OW terminal 78 remains in the "+" state. Therefore,
The motor 10 still continues to rotate.

As shown in FIG. 12, when the pressing of the contact portion 34 by the projection 26 is completed and the cam plate 28 reaches the most rotated position (when the guide pin 38 contacts the end of the through hole 36), A Both the contact lever 68 and the B contact lever 70 come into contact with the moving contact 58 to prepare for dynamic braking.

Further, when the rotation of the rotary gear wheel 12 advances and the + contact lever 62 reaches the cutout portion 24 of the moving contact 20, the contact with the moving contact 20 is released, and the LOW terminal 78 of the motor portion 10A and the power source are connected. The connection with the + side is released. Immediately after that, the G contact lever 66
Contacts the protrusion 22 of the moving contact 20.

Therefore, as shown in FIG. 7 again, the LOW terminal 78 of the motor unit 10A is connected to the S contact lever 64,
Moving contact 20, G contact lever 66, B contact lever 70, moving contact 58 and A contact lever 68
Grounded through the motor 10
Automatically brakes automatically. At this time, the wiper intermittently stops at the lower reversal position located at the lower end of the windshield glass.

After that, the above-described steps are repeated and the motor 1
0 automatically rotates intermittently, and the wiper can be operated intermittently.

As described above, the protrusion 26 presses the contact portion 34 to forcibly rotate the cam plate 28 around the support shaft 32, and the connection between the LOW terminal 78 of the motor portion 10A and the power source + side is released. After that, the cam plate 28 is gradually moved by the action of the damper 44, and the C contact lever 7 is again moved.
When the motor 2 contacts the moving contact 60 and the positive side of the power source is connected to the LOW terminal 78 of the motor unit 10A,
This is the stop time for intermittent rotation.

As described above, since the cam plate 28 is rotated by the protrusion 26 formed on the rotary gear wheel 12 and the contact portion 34 formed on the cam plate 28, the structure is simple and reliable. Power supply to 10A can be stopped. Further, with the simple structure of the tension spring 40 and the damper 44, the return time of the cam plate 28, that is, the resumption time of energization to the motor portion 10A can be set, and the intermittent rotation time can be easily set.
Furthermore, since other parts such as an expensive motor controller, which are indispensable in the conventional wiper drive motor, are not required and an electric wiring connection work is not required, the cost is extremely low. It also does not cause noise. Also, since no electric parts such as a motor controller are used,
The intermittent rotation time does not fluctuate due to environmental temperature changes, and the reliability is also improved.

Next, another embodiment of the present invention will be described. The same components as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment and the description thereof is omitted.

FIG. 13 shows the overall structure of a wiper driving motor 80 according to the second embodiment of the present invention. Further, FIG. 14 shows a perspective view of a main part of the motor 80.

In the motor 80, a cam plate 82 is arranged coaxially with the rotary gear wheel 12. The cam plate 82 is formed in a substantially fan shape, and is rotatably supported by a support shaft 84 protruding from the cover 14. Therefore, the cam plate 82 can rotate relative to the rotary gear wheel 12.

At the radially outer end of the cam plate 82, one end portion in the circumferential direction thereof is extended with a tongue portion 86 which constitutes actuating means and is elastically deformable. The tip of the tongue piece 86 is bent in a substantially V shape, and is located on the movement locus of the protrusion 26 formed on the rotary gear wheel 12 and can be engaged with this. That is, when the rotary gear wheel 12 rotates while the protrusion 26 is in contact with the tongue portion 86, the cam plate 82 is pressed and forcedly rotated around the support shaft 84, and the pressing force by the protrusion 26 is further applied. When the elastic force of the portion 86 is exceeded, the tongue piece portion 86 is elastically deformed and the engagement between the projection 26 and the tongue piece portion 86 is released (the projection 26 rides over the tongue piece portion 86).

The cover 1 is provided on both sides of the cam plate 82.
A pair of stoppers 88 and 90 are formed so as to project from the position 4. Therefore, the cam plate 82 includes the stopper 88,
The configuration is such that it can rotate only in the range in which it abuts 90.

One end of a tension spring 92 as an elastic body is connected to the end of the cam plate 82 opposite to the tongue piece 86 (on the side of the stopper 88).
The other end of 2 is connected to the cover 14. This allows
The cam plate 82 is always urged in the direction of contacting the stopper 88. The biasing force of the tension spring 92 is set to be smaller than the force by which the protrusion 26 rides over the tongue piece portion 86 (elastic force of the tongue piece portion 86).

A gear portion 94 is formed on the outer peripheral edge of the cam plate 82 in the radial direction, and a damper 44 having the same construction as that of the first embodiment is meshed with the gear portion 94.

Rotating gear wheel 12 of cam plate 82
The + contact lever 96 and the G contact lever 98 as the second moving contact are arranged on the side surface.
One end of each contact lever is fixed to the inner peripheral wall of the cam plate 82, and the other end of the contact lever is the rotary gear wheel 12.
The tip extends in the direction and contacts the moving contact 20 (or the surface of the rotary gear wheel 12).

The rotary gear wheel 12 (moving contact 2
0) and the cover 14, an S contact lever 100 as a fixed contact is arranged, and the tip of the S contact lever 100 contacts the moving contact 20.

Next, the structure of the electric circuit will be described. FIG. 15 shows a schematic configuration diagram of the entire electric circuit including the wiper switch 102, and FIGS. 16 and 17 show the connection state of each contact lever.

The + contact lever 96 is connected to the power source + side through the wiper switch 102, and the tip end thereof can come into contact with the moving contact 20 of the rotary gear wheel 12 (in other words, the cutout portion 24 is provided). Corresponding, it will be in a non-contact state at this position). S contact lever 100
LOW of the motor 80 via the wiper switch 102.
It is connected to the terminal 104 and its tip is always the moving contact 2.
It is in contact with 0. The G contact lever 98 is grounded, and the tip of the G contact lever 98 is the protrusion 22 of the moving contact 20.
(In other words, it corresponds to the protrusion 22 and is in contact with the protrusion 22 only at this position).

In this case, when the cam plate 82 is in contact with one of the stoppers 88, the tip of the + contact lever 96 contacts the moving contact 20 and the tip of the G contact lever 98 contacts the moving contact 20. Protrusion 22
When the cam plate 82 is in contact with the other stopper 90, the tip of the + contact lever 96 is located in the notch 24 and the moving contact 2
The positional relationship between the respective parts is set so that the G contact lever 98 is in non-contact with 0 and the tip of the G contact lever 98 is in contact with the protrusion 22 of the moving contact 20.

Next, the operation of this embodiment will be described. FIG.
Shows the state in which the wiper switch 102 has been switched to the “INT” position and the motor 80 has stopped due to dynamic braking. In this state, the cam plate 82 is rotated and is in contact with one stopper 90. Therefore, the + contact lever 96 reaches the cutout portion 24 of the moving contact 20, and the contact with the moving contact 20 is released. Also,
The G contact lever 98 is in contact with the protruding portion 22 of the moving contact 20. Therefore, the LOW terminal 10 of the motor 80
4 is an S contact lever 100, a moving contact 20 and a G
It is grounded via a contact lever 98. Therefore, the motor 80 is in a stopped state.

When the motor 80 is stopped by this dynamic braking, the tension spring 92 connected to the cam plate 82 is expanded by forcibly rotating the cam plate 82 around the support shaft 84. The cam plate 82 is biased.

Next, the cam plate 82 is rotated around the support shaft 84 by the urging force of the tension spring 92 (see FIG. 1).
6) Rotate to the left). Here, the cam plate 8
When 2 rotates around the support shaft 84, the pinion 4 of the damper 44
8 is also rotated. For this reason, the rotational force (energy) transmitted through the pinion 48 is dissipated, and the cam plate 82 gradually (slowly) moves to the original position.

When the cam plate 82 completely reaches the original position (abuts on the stopper 88), the + contact lever 96 comes into contact with the moving contact 20 as shown in FIG. At the same time, the G contact lever 98 is separated from the protruding portion 22 of the moving contact 20 and the connection is released. Therefore, the + contact lever 96 and the moving contact 20
And L of the motor 80 via the S contact lever 100
The + side of the power supply is connected to the OW terminal 104, and L
The OW terminal 104 is in the "+" state.

For this reason, the motor 80 starts to operate, and the rotary gear wheel 12 starts to rotate together with the crank arm 18 in the clockwise direction (arrow CW direction) in FIG. Therefore, the wiper is also activated.

When the projection 26 of the rotary gear wheel 12 contacts the tongue piece 86 of the cam plate 82 after the motor 80 (rotary gear wheel 12) continues to rotate, the projection 26 presses the tongue piece 86 and the cam is pressed. The plate 82 is forcibly rotated around the support shaft 84. Therefore, the + contact lever 96 and the G contact lever 98 move together with the cam plate 82, and the contact position with the moving contact 20 is gradually changed.

When the projection 26 presses the tongue piece 86, that is, the rotation of the cam plate 82, the + contact lever 96 reaches the cutout portion 24 of the moving contact 20, and the contact with the moving contact 20 is released. LOW terminal 1
The connection between 04 and the power supply + side is released. Immediately after that, the G contact lever 98 moves the protrusion 2 of the moving contact 20.
Touch 2. Therefore, again as shown in FIG.
The W terminal 104 is grounded via the S contact lever 100, the moving contact 20, and the G contact lever 98, and the motor 80 automatically performs dynamic braking.

In this case, until the G contact lever 98 comes into contact with the projecting portion 22 of the moving contact 20 to completely stop after starting the dynamic braking, the rotary gear wheel 12 tries to continue to rotate due to inertial force, The projection 26 is the tongue portion 8
Press 6. When this pressing force exceeds the elastic force of the tongue piece portion 86, the tongue piece portion 86 is elastically deformed and the projection 26 and the tongue piece portion 86.
Is disengaged and the projection 26 rides over the tongue piece 86.

Thereafter, the above-described steps are repeated and the motor 8
0 automatically rotates intermittently, and the wiper is operated intermittently.

As described above, in the motor 80, after the G contact lever 98 comes into contact with the protruding portion 22 of the moving contact 20 to start the dynamic braking (the LOW terminal 1 of the motor 80).
04, after the connection between the power supply + side is released), the damper 4
By the action of 4, the cam plate 82 is gradually rotated,
The time during which the + contact lever 96 contacts the moving contact 20 again and the + side of the power source is connected to the LOW terminal 104 of the motor 80 is the stop time in the intermittent rotation of the motor 80.

As described above, also in this embodiment, the projection 26 formed on the rotary gear wheel 12 and the cam plate 8 are
The cam plate 82 by the tongue piece portion 86 formed on the
Since it is configured to rotate, the structure is simple and the power supply to the motor 80 can be reliably stopped. In addition, with a simple configuration of the tension spring 92 and the damper 44, the return time of the cam plate 82, that is, the resumption time of energization of the motor 80 can be set, and the intermittent rotation time can be set easily. Further, in this case as well, expensive parts such as a motor controller are not required and electrical wiring connection work is not required, which is extremely low in cost and does not cause noise. In addition, the intermittent rotation time does not fluctuate due to changes in the environmental temperature, and the reliability is improved.

FIG. 18 shows the overall structure of a wiper driving motor 110 according to the third embodiment of the present invention.

In the motor 110, the rotary gear wheel 12
The moving contact 20 provided as the first moving contact, and the + contact lever 62, the S contact lever 64, and the G contact lever 66, which are the fixed contacts corresponding to the moving contact 20, are basically the first embodiment described above. It has the same configuration as. Further, the rotary gear wheel 12 is formed with a protrusion 112 that constitutes an actuating means. The protrusion 112 is formed relatively long along the circumferential direction of the rotary gear wheel 12.

On the other hand, in the vicinity of the rotary gear wheel 12,
A slider 114 is arranged. Slider 114
Is formed in a rectangular plate shape and is slidably arranged on the upper surface of the cover 14, as schematically shown in FIG. On the lower surface of the slider 114, an abutting portion 11 that projects toward the rotary gear wheel 12 and constitutes an operating means is provided.
6 is formed and can be engaged with the protrusion 112. That is, when the rotary gear wheel 12 rotates while the protrusion 112 is in contact with the contact portion 116, the slider 1
14 is pressed and forced to slide in the tangential direction of the rotary gear wheel 12.

One end of the tension spring 118 as an elastic body is connected to one end of the slider 114, and the other end of the tension spring 118 is connected to the housing 30. As a result, the slider 114 is always in contact with the contact portion 1.
16 is biased in a direction in which the protrusion 112 of the rotary gear wheel 12 moves into the movement locus of the protrusion 112.
6 is located on the movement trajectory of the protrusion 112.

Rotating gear wheel 12 of slider 114
A gear portion 120 is formed on the side wall on the side of, and a damper 44 similar to that of the first embodiment is engaged.

A moving contact 122 as a second moving contact is provided on the upper surface of the slider 114 having the above structure. Similar to the moving contact 20, the moving contact 122 has a crank shape and is integrally formed with the slider 114, and moves together with the slider 114. This moving contact 122 is an A contact lever 1 as a fixed contact.
24, B contact lever 126, C contact lever 128, and the tip of each contact lever contacts the moving contact 122 (or the surface of the slider 114) to form an electric circuit corresponding to the wiper switch 130. It is like this.

Next, the structure of the electric circuit will be described. FIG. 20 shows an overall schematic configuration diagram including the wiper switch 130, and FIGS. 21 to 26 show the connection state of each contact lever.

The + contact lever 62 is connected to the + side of the power source, and its tip can contact the moving contact 20 of the rotary gear wheel 12 (in other words, it corresponds to the notch 24, At the position will be in a non-contact state). The S contact lever 64 is connected to the LOW terminal 132 of the motor 110 via the wiper switch 130, and the tip end thereof is always in contact with the moving contact 20. The G contact lever 66 is grounded and its tip can contact the protrusion 22 of the moving contact 20 (in other words, it corresponds to the protrusion 22 and only contacts the protrusion 22 at this position). State).

On the other hand, the A contact lever 124 is grounded, and its tip can contact the moving contact 122 of the slider 114. B contact lever 12
6 is the L of the motor 110 via the wiper switch 130.
It is connected to the OW terminal 132, and its tip is always in contact with the moving contact 122. The C contact lever 128 is connected to the + side of the power source, and the tip end thereof can contact the moving contact 122.

Next, the operation of this embodiment will be described. 21 to 26 show operating states of the moving contact 20, the protrusion 112, the slider 114, the moving contact 122, and the like of the rotary gear wheel 12 when the motor 110 intermittently rotates.

In FIG. 21, the wiper switch 130 is set to "IN.
The state is shown in which the motor 110 is switched to the “T” position and the motor 110 stops by dynamic braking. In this state, the motor 11
The LOW terminal 132 of 0 is connected to the B contact lever 126 via the wiper switch 130 and is in a closed state. Further, in this state, the rotary gear wheel 1
The slider 114 is forcibly slid against the urging force of the tension spring 118 by the second projection 112 abutting and pressing the abutting portion 116. Therefore, the C contact lever 128 moves the moving contact 122. It is separated from and is in a non-contact state. The A contact lever 124 and the B contact lever 126 are both in contact with the moving contact 122. Therefore, the L of the motor 110
The OW terminal 132 is grounded via the B contact lever 126, the moving contact 122, and the A contact lever 124. Therefore, the motor 110 is in a stopped state.

Then, as shown in FIG. 22, the slider 114 starts to slide to the original position by the urging force of the tension spring 118. Here, when the slider 114 slides, the moving force (energy) of the slider 114 is dissipated in the same manner as in the first embodiment described above, whereby the slider 114 gradually (slowly) slides to its original position. Moving.

When the slider 114 completely reaches the original position, the A contact lever 124 is separated from the moving contact 122 and is in a non-contact state as shown in FIG. 23, and the C contact lever 128 is in contact with the moving contact 122. The B contact lever 126 through the moving contact 122.
Connected with. Therefore, the C contact lever 128,
The + side of the power supply is connected to the LOW terminal 132 of the motor 110 via the moving contact 122 and the B contact lever 126, and the LOW terminal 132 is in the “+” state.
Therefore, the motor 110 starts to operate, and the rotary gear wheel 12 starts to rotate together with the crank arm 18 in the clockwise direction (arrow CW direction) of FIGS. 23 to 25. Therefore, the wiper is also activated.

As shown in FIG. 25, after the motor 110 (rotary gear wheel 12) continues to rotate, the projection 112 of the rotary gear wheel 12 is brought into contact with the contact portion 116 of the slider 114.
When abutting against, the projection 112 presses the abutting portion 116 to forcibly slide the slider 114. Therefore, as shown in FIG. 26, the C contact lever 128 is separated from the moving contact 122 to be in the non-contact state, and the power source +
The connection with the side is released. Therefore, the L of the motor 110
The OW terminal 132 is in a neutral state, but the motor 1
10 (rotary gear wheel 12) continues to rotate due to inertial force.

When the pressing of the contact portion 116 by the projection 112 is completed and the slider 114 reaches the most slid position, the A contact lever 124 comes into contact with the moving contact 122, and again as shown in FIG. LO
The W terminal 132 is grounded via the B contact lever 126, the moving contact 122, and the A contact lever 124, and the motor 110 automatically performs dynamic braking. At this time, the wiper intermittently stops at the lower reversal position located at the lower end of the windshield glass.

Thereafter, the above-described process is repeated and the motor 1
The 10 automatically rotates intermittently, and the wiper can be operated intermittently.

As described above, after the projection 112 presses the contact portion 116 to forcibly slide the slider 114 and the LOW terminal 132 of the motor 110 is grounded, the slider 44 is gradually moved by the action of the damper 44. After being moved, the C contact lever 128 again contacts the moving contact 122 and the LOW terminal 132 of the motor 110 is moved.
The time until the power supply + side is connected to is the stop time in the intermittent rotation of the motor 110.

As described above, also in the motor 110 according to the third embodiment, the protrusion 112 formed on the rotary gear wheel 12 and the contact portion 11 formed on the slider 114.
Since the slider 114 is slid by 6 and 6, the structure is simple and the energization of the motor 110 can be reliably stopped. Also, tension spring 1
The slider 11 has a simple structure including 18 and the damper 44.
4 can be set, that is, the resumption time of energization to the motor 110 can be set, and the intermittent rotation time can be easily set. Furthermore, since other parts such as an expensive motor controller, which are indispensable in the conventional wiper drive motor, are unnecessary and the electrical wiring connection work is unnecessary, the cost is extremely low. It also does not cause noise.
Further, since no electric parts such as a motor controller are used, the intermittent rotation time does not vary due to environmental temperature changes, and reliability is improved.

In each of the above embodiments, the damper 4
Although 4 is an oil type in which silicone oil 56 is enclosed, the present invention is not limited to this, and other configurations such as an air type damper may be used. Further, the tension springs 40, 92, 118 as elastic bodies and the damper 44 may be integrally combined. Even in these cases, the returning operation of the cam plates 28, 82 or the slider 114 can be easily controlled, and the intermittent rotation time can be set arbitrarily.

[0101]

As described above, the wiper drive motor according to the present invention can operate the wiper intermittently with a simple structure and at a low cost, and can increase the degree of freedom in selecting the application site. Has the effect that can.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a wiper driving motor according to a first embodiment of the present invention.

FIG. 2 is an overall perspective view of the motor according to the first embodiment.

FIG. 3 is an exploded perspective view of essential parts of the motor according to the first embodiment.

FIG. 4 is a sectional view of a damper.

FIG. 5 is a partial cross-sectional view of a motor showing an arrangement state of a rotary gear wheel, a contact lever and the like.

FIG. 6 is an overall circuit configuration diagram of a motor including a wiper switch.

FIG. 7 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 8 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 9 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 10 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 11 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 12 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 13 is an overall configuration diagram of a wiper driving motor according to a second embodiment of the present invention.

FIG. 14 is a perspective view of a main part of a motor according to a second embodiment.

FIG. 15 is an overall circuit configuration diagram of a motor including a wiper switch.

FIG. 16 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 17 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 18 is an overall configuration diagram of a wiper driving motor according to a third embodiment of the present invention.

FIG. 19 is a partial cross-sectional view of a motor showing an arrangement state of a rotary gear wheel, a contact lever and the like.

FIG. 20 is an overall circuit configuration diagram of a motor including a wiper switch.

FIG. 21 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 22 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 23 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 24 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 25 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

FIG. 26 is a schematic diagram showing an operating state of each part of the motor during intermittent rotation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 motor 10A motor part 10B gear part 12 rotary gear wheel 14 cover 20 moving contact (first moving contact) 26 protrusion (operating means) 28 cam plate 34 contact part (operating means) 40 tension spring (slowing means, elasticity) Body 44 Damper (slow moving means) 58 Moving contact (second moving contact) 60 Moving contact (second moving contact) 62 + Contact lever (fixed contact) 64 S Contact lever (fixed contact) 66 G Contact lever ( Fixed contact) 68 A contact lever (fixed contact) 70 B contact lever (fixed contact) 72 C contact lever (fixed contact) 74 D contact lever (fixed contact) 76 Wiper switch

Claims (6)

[Claims] 1. A wiper drive motor for actuating a wiper in response to an operation of a wiper switch having an intermittent mode, the rotary gear wheel rotating together with a motor rotation shaft and having the wiper connected thereto, said rotary gear wheel. A plate member that is movably supported in the vicinity of, and an operating unit that presses and moves the plate member as the rotary gear wheel rotates at a predetermined rotational position of the rotary gear wheel; And a delay means for returning the plate member to the original position after a predetermined time has passed, the rotary gear wheel and the plate member are provided, and when the intermittent mode of the wiper switch is selected, The connection state is changed by the movement of the plate member to stop the power supply to the motor, and the delay means The plate motor wiper drive, characterized in that it comprises a contact which constitutes an electric circuit for supplying power to the motor, the by the return of the member with. 2. The actuating means comprises a protrusion formed on either one of the rotary gear wheel and the plate member so as to project toward the other, and an abutment formed on the other one corresponding to the protrusion. 2. The wiper according to claim 1, wherein the plate member is moved together with the rotary gear wheel by bringing the protrusions and the contact portion into contact with each other when the rotary gear wheel rotates. Drive motor. 3. The retarding means includes an elastic body that is connected to the plate member and always biases the plate member toward a reference position; and a damper that engages with the plate member and dissipates the biasing force of the elastic body. The wiper drive motor according to claim 1 or 2, further comprising: 4. A wiper drive motor for operating a wiper in response to operation of a wiper switch having an intermittent mode, the rotary gear wheel rotating with a motor rotation shaft and having the wiper connected thereto, said rotary gear wheel. A cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel; a cam plate rotatably supported in the vicinity of the rotary gear wheel; and a rotation of the rotary gear wheel at a predetermined rotational position of the rotary gear wheel. An actuating means for pressing and rotating the cam plate; a fixed contact having one end fixed to the cover and the other end extending toward the rotary gear wheel and the cam plate; and the fixing of the rotary gear wheel. It is provided integrally with the surface on the contact side and contacts the fixed contact, and the fixed contact causes electricity corresponding to the wiper switch. A pattern-shaped first moving contact for forming a circuit, and a fixed contact and the first moving contact that are integrally provided on the surface of the cam plate on the fixed contact side and contact the fixed contact. Pattern-shaped second moving contacts for forming an electric circuit corresponding to the wiper switch; delaying means for returning the cam plate rotated by the operating means to the original position after a predetermined time has passed; A motor for driving a wiper, comprising: 5. A wiper drive motor for operating a wiper in response to operation of a wiper switch having an intermittent mode, the rotary gear wheel rotating with a motor rotation shaft and having the wiper connected thereto, said rotary gear wheel. A cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel; a cam plate that is coaxial with the rotary gear wheel and is rotatable relative to the rotary gear wheel; and a rotation of the rotary gear wheel at a predetermined rotational position of the rotary gear wheel. And a pattern for forming an electric circuit corresponding to the wiper switch, which is integrally provided on the surface of the rotary gear wheel on the cam plate side, which presses and rotates the cam plate. A first moving contact, one end of which is fixed to the cam plate and the other end of which extends in the direction of the rotary gear wheel. And a second moving contact for contacting the first moving contact to form an electric circuit corresponding to the wiper switch with the first moving contact, and the cam plate rotated by the operating means. A wiper drive motor, comprising: a delaying unit that returns to the original position after a predetermined time has passed. 6. A wiper drive motor for operating a wiper in response to operation of a wiper switch having an intermittent mode, the rotary gear wheel rotating with a motor rotation shaft and having the wiper connected thereto, said rotary gear wheel. A cover that accommodates the rotary gear wheel and rotatably supports the rotary gear wheel; a slider that is slidably arranged near the rotary gear wheel; and a rotary gear wheel that rotates at a predetermined rotational position of the rotary gear wheel. An operating means for pressing and sliding the slider, a fixed contact having one end fixed to the cover and the other end extending toward the rotary gear wheel and the slider, and the fixed contact of the rotary gear wheel. Is integrally provided on the side surface and comes into contact with the fixed contact and is fixed to the wiper switch by the fixed contact. A pattern-shaped first moving contact for forming a corresponding electric circuit, and a fixed contact and the first moving contact that are integrally provided on a surface of the slider on the fixed contact side and contact the fixed contact. And a pattern-shaped second moving contact for forming an electric circuit corresponding to the wiper switch, and a delay means for returning the slider slid by the actuating means to the original position after a lapse of a predetermined time. And a wiper drive motor.