JPH0453332Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a wiper device for a door window glass, and in particular to a door window wiper device that can prevent rattling of a reduction gear mechanism when the operation is stopped and that has low operating noise. This invention relates to a windshield wiper device.

[Prior Art] This type of conventional door window glass wiper device generally includes a wiper motor built into the inside of the door, a wiper blade that wipes the door window glass surface by reciprocating drive of the wiper motor, and this wiper blade. The wiper motor includes a reduction gear mechanism that is installed on each of the wiper motors and connects the wiper blades and the wiper motor, and a control mechanism that is connected to the wiper motor and controls the drive of the wiper motor.

In such a door window glass wiper device, when the wiper motor is driven reciprocally, the rotational force of the wiper motor is transmitted to the wiper blade via a reduction gear mechanism, and the wiper blade rotates reciprocatingly, thereby reducing the amount of dust that adheres to the door window glass. Wipe away water droplets and other deposits. As a result, it is possible to prevent a decrease in visibility.

An example of the above-mentioned door window glass wiper device is the one described in Japanese Patent Laid-Open No. 129353/1983.

[Problem that the invention attempts to solve]

However, since the above-mentioned door window glass wiper device simply equips the wiper motor and the wiper blade with a reduction gear mechanism, this reduction gear mechanism generates backlash due to backlash when the device stops operating. Furthermore, since a normal motor is used as the wiper motor, there are problems such as high operating noise.

SUMMARY OF THE INVENTION An object of the present invention is to provide a door window glass wiper device that can prevent rattling of a reduction gear mechanism when the device is stopped and has low operating noise.

[Means for solving problems]

The present invention uses a surface wave motor as a wiper motor, and holds the surface wave motor in a holder fixed inside the door so as to be movable in the meshing direction of the output gear and input gear of the reduction gear mechanism. The present invention is characterized in that an elastic body is provided between the wiper motor and the holding body to constantly bias the output gear and input gear of the reduction gear mechanism that mesh with each other in the direction of meshing.

[Effect]

In this invention, the elastic body interposed between the holder and the surface wave motor constantly biases the output gear and input gear of the reduction gear mechanism, which mesh with each other, in the direction of meshing. It is possible to prevent the gear mechanism from rattling.

Furthermore, by using a surface wave motor as the wiper motor, the operating force can be reduced compared to the case where a normal motor is used.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a door window glass wiper device according to the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a car door, and this door 1
It is formed into a hollow shape by an outer plate 10 and an inner plate 11, and an opening 12 is provided at the upper end surface of the outer plate 10 and inner plate 11, and a door lip 13 is provided at the edge of the opening 12. A window glass 14 is disposed inside the door 1 so as to be movable up and down by a window regulator (not shown).

Reference numeral 2 denotes a holder, which in this embodiment consists of a hollow case 20 and a cover 21. Guide slide portions 22 are provided vertically on both sides inside this case 20, and mounting pieces 23 are provided protrudingly on the outside of the case 20. The holding body 2 thus formed is housed in the door 1, and the mounting piece 23 of the holding body 2 is fixed to the mounting body 15 inside the outer panel 10 of the door 1 with screws 24.

3 is a surface wave motor as a wiper motor. This surface wave motor 3 is thin, lightweight, and small, and can obtain large torque at low speed rotation. This surface wave motor 3 is mounted on the guide slide portion 22 of the above-mentioned holder 2 in the vertical direction, that is, an output gear 50 and an input gear 51 (to be described later).
It is held so that it can slide in the direction of engagement.

Reference numeral 4 denotes a wiper rotation shaft rotatably supported on the cover 21 of the holder 2. The base end of a wiper arm 40 is fixed to the wiper rotation shaft 4 with a key 41, and a wiper stay 42 is connected to the tip of the wiper arm 40. A rubber ribbon 43 is provided, and the rubber ribbon 43 is brought into contact with the outer surface of the door window glass 14. This wiper arm 40 and wiper stay 4
2 and the rubber ribbon 43 constitute a wiper blade.

Reference numeral 5 denotes a reduction gear mechanism, and this reduction gear mechanism 5 includes an output gear 50 fixed to the rotation shaft (output shaft) 30 of the surface wave motor 3, and a key 41 attached to the wiper rotation shaft 4.
It consists of a pin-shaped input gear 51 fixed with
The output gear 50 and the input gear 51 having a pinion shape are meshed with each other. The above-mentioned input gear 51 is
A meshing tooth portion 510 with a center angle of about 120, a boss portion 511 fixed to the wiper rotation shaft 4, and the boss portion 51
1 and a connecting arm portion 512 integrally connected between the meshing tooth portion 510 and the meshing tooth portion 510.

6 is an elastic body, and in this embodiment, a pressure spring made by bending a leaf spring into a chevron shape is used.
interposed between a stopper 60 fixed to the lower end of the guide slide portion 22 and the lower surface of the surface wave motor 3, and constantly pushing up the surface wave motor 3;
The output gear 50 of the reduction gear mechanism 5 and the meshing tooth portion 510 of the input gear 51 of the input gear 51 are always biased in the meshing direction.

Reference numerals 70 and 71 refer to limit switches as control mechanisms, which are fixed in the holder 2 and connected to the surface wave motor 3 and an operating switch (not shown) disposed in the driver's seat.
linked to. The limit switch 70 on the left side detects the clockwise rotation of the pinion gear 51 (ie, the left end of the pinion gear 51), and switches the rotation of the surface wave motor 3 from counterclockwise to clockwise. Further, the limit switch 71 on the right side detects the counterclockwise rotation of the pinion gear 51 (that is, the right end of the pinion gear 51), and switches the rotation of the surface wave motor 3 from the clockwise direction to the counterclockwise direction. The limit switches 70 and 71 constitute a control mechanism.

The door window glass wiper device of the present invention in this embodiment has the above configuration, and its operation will be explained below.

First, the wiper (wiper arm 40, wiper stay 42, rubber ribbon 43) is
As shown in the figure, turn on the operation switch while the door is stored inside the door 1. Then, the rotating shaft 30 of the surface wave motor 3 rotates clockwise, the gear 50 also rotates clockwise, and the pinion gear 51 meshing with the gear 50 rotates counterclockwise. The wiper also rotates counterclockwise.

The above-mentioned pinion gear 51 reaches the limit switch 71 on the right side, and the limit switch 7 on the right side reaches the limit switch 71 on the right side.
1 detects the counterclockwise rotation of the pinion gear 51, that is, the right end of the pinion gear 51. Then, the rotation of the rotation shaft 30 of the surface wave motor 3 switches from clockwise to counterclockwise, and the gear 5 rotates accordingly.
0 also rotates counterclockwise, and the pinion gear 51 that meshes with the gear 50 rotates clockwise, and the wiper also rotates clockwise accordingly.

The above-mentioned pinion gear 51 reaches the limit switch 70 on the left side, and the limit switch 7 on the left side
0 detects the clockwise rotation of the pinion gear 51, that is, the left end of the pinion gear 51. Then,
The rotating shaft 30 of the surface wave motor 3 rotates clockwise, the wiper rotates counterclockwise, and the above-mentioned operation is repeated to cause the wiper to reciprocate, removing water droplets and dirt attached to the outer surface of the door window glass 14. Wipe off any deposits. As a result, visibility from the side of the automobile or the rear or side from an outside mirror is ensured.

Then, when the operating switch is set to 0FF, the wiper is housed in the door 1 as shown in FIGS. 1 and 4. At this time, the surface wave motor 3 is constantly pushed up by the pressure spring 6, and the output gear 50 of the reduction gear mechanism 5 is always biased in the direction of meshing with the input gear 51 of the pinion type. The backlash with the input gear 51 is reduced, and as a result, there is no backlash between the output gear 50 and the input gear 51 having an annular shape when the wiper device is stopped.

Furthermore, since the door window glass wiper device of the present invention in this embodiment uses the surface wave motor 3 as the wiper motor, it has advantages such as lower operating noise compared to the case of a normal motor.

In this way, the drive unit is thin (approximately 35 mm thick).
Since the light and small surface wave motor 3 is used, the drive section can be housed inside the door 1 and the wiper section can be positioned on the door window glass 14 surface. Also, high torque (more than 15cm Kg) can be obtained with one deceleration.

In addition, in the above-mentioned embodiment, the reduction gear mechanism 5
Since the deceleration occurs only once between the gear 50 and the pinion gear 51, the operating noise is low.

[Effect of idea]

As is clear from the above, the door window glass wiper device of the present invention can prevent rattling of the reduction gear mechanism when the operation is stopped, and the operation noise is small.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of a door window glass wiper device according to the present invention, in which FIG. 1 is a cross-sectional view showing the main parts, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1 and 4 are cross-sectional views showing the state of use. 1...Door, 14...Door window glass, 2
... Holding body, 22 ... Guide slide part, 3 ...
Surface wave motor (wiper motor), 30... Rotating shaft (output shaft), 4... Wiper rotating shaft, 40... Wiper arm, 42... Wiper stay, 43... Rubber ribbon, 5... Reduction gear mechanism, 50... Output gear, 51 . . . Angle-shaped input gear, 6 . . . Pressure spring (elastic body), 70 and 71 . . . Limit switch (control mechanism).

Claims (1)

[Scope of Claim for Utility Model Registration] A wiper motor built into the inside of the door via a holder, a wiper blade that wipes the door window glass surface by reciprocating drive of the wiper motor,
In a door window glass wiper device comprising a reduction gear mechanism installed on the wiper blade and the wiper motor, and a control mechanism connected to the wiper motor and controlling the drive of the wiper motor, the reduction gear mechanism The wiper motor includes an output gear fixed to the output shaft of the wiper motor and an input gear fixed to the wiper blade, the wiper motor being a surface wave motor,
The holding body holds the output gear and the input gear of the reduction gear mechanism so as to be movable in a direction in which the output gear and the input gear of the reduction gear mechanism mesh with each other. An elastic body that constantly biases the gear in the direction of meshing.
A wiper device for a door window glass.