JPH0428281Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wiper device for an openable window that wipes the glass surfaces of openable side windows, rear windows, etc. in a vehicle.

[Problems to be solved by the prior art and the invention] Today, vehicles with side mirrors attached to the doors are mass-produced. It may be difficult to see. Therefore, as shown in Japanese Utility Model Publication No. 60-1006 and U.S. Pat. No. 3,107,383, there have been known devices equipped with a wiper device for wiping window glass that opens and closes. This device stops the operation of the wiper motor when the window glass opens more than a predetermined amount, thereby preventing the blade from coming off the window glass and flying into the room. However, these devices use a detection switch to detect the opening and closing of the window glass, and control the wiper motor based on this. As a result, the structure becomes complicated, requiring time and effort to assemble, which increases costs. However, since it is installed inside the door, there is a problem in that the detection switch is exposed to dust, rainwater, etc. and its reliability is significantly impaired.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was created with the aim of providing a wiper device for an opening/closing window that can eliminate these drawbacks. In a wiper device that wipes a window glass with a blade provided at the tip of a wiper arm that reciprocates in response to power from a wiper drive means, the wiper arm may be free from the drive of the wiper drive means. On the other hand, a locking part provided on the wiper arm side contacts the window glass side to prevent the blade from wiping beyond the tip edge of the window glass that opens when the wiper arm moves forward. This is characterized by the provision of a regulating body that is free with respect to the driving means and restricts further forward movement.

With this configuration, the present invention prevents the blade from coming off the window glass without using a detection switch for detecting that the window glass is opened.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, reference numeral 1 denotes a side wiper device attached to a door 2. A wiper arm 3 constituting the side wiper device 1 has an arc shape, and a blade 5 is disposed in the left-right direction at the upper end of the wiper arm 3 via a bracket 4. installed.
Reference numeral 6 denotes an arm guide provided on the outer panel 2a side of the door 2, and the arm guide 6 guides the wiper arm 3 up and down. 6a and a pulley 6b around which it is wound are provided above and below. The operating wire 7 and the wiper arm 3 are connected via a connecting body 8, which will be described later. In addition, 2c is a glass guide that guides the front edge of the window glass 2b, 2d is an inner plate of the door, and 2e
is a molding provided on the upper edge of the outer panel 2a.

9 is a drive motor, and the drive motor 9 is integrally attached to the inner plate 2d side.
A motor shaft (not shown) of the drive motor 9 projects forward, and is adapted to rotate a pulley (not shown) inside the pulley case 10 in forward and reverse directions. The actuation wire 7 is wound so as to bypass the front edge from the front side. Then, the drive motor 9 is controlled in conjunction with turning on a wiper switch (not shown) (control to reverse the motor 9 by detecting the position of the coupling body 8, the stopped state of rotation of the motor 9, or the overload current of the motor 9) The operating wire 7 is reciprocated by forward and reverse driving, which causes the wiper arm 3 to move up and down, thereby wiping the window glass surface with the blade 5.

The lower end of the wiper arm 3 passes through the connecting body 8 so as to be slidable in the vertical direction, and a torque clutch 11 is interposed between the connecting body 8 and the wiper arm 3. In other words, this torque clutch 11 is
A bullet 11 accommodated in a groove 8a formed in the connecting body 8
a, and the ball 1 that is pressed by the bullet 11a.
1b, and normally the ball 11b is elastically engaged with the engagement hole 11c formed in the wiper arm 3, so that the connecting body 8 and the wiper arm 3 are in the normal power transmission state in which they are integrated. However, as will be described later, when a high load is applied to the wiper arm 3, the ball 11b resists the bullet 11a and sinks into the groove 8a, causing the torque clutch 1 to
1 is cut, and the integral relationship between the connecting body 8 and the wiper arm 3 is released.

On the other hand, 12 is a regulating body provided at the lower end of the window glass 2b, and when the regulating body 12 moves downward with the opening operation of the window glass 2b, it regulates the upward movement of the wiper arm 3. There is. That is, the wiper arm 3 moves up and down as the connecting body 8 moves up and down in the range between the stoppers 13, 13 provided on the wiper guide 6, but when the window glass 2b is opened beyond a predetermined value, The engaging piece 3b provided at the lower end of the wiper arm 3 is the regulating body 1.
2, the upward movement above a predetermined height is regulated. And this regulatory body 1
2, when the wiper arm 3 is restricted from rising, the wiper arm 3 receives a high load and the power transmission from the torque clutch 11 is cut off.As a result, only the connecting body 8 is separated from the wiper arm 3, and the wiper arm 3 is completely removed. The wiper arm 3 reaches the raised position, but when the connecting body 8 is reversed and lowered, the torque clutch 11 is engaged again and the wiper arm 3 is lowered. Therefore, the wiper arm 3 is configured to reciprocate up and down within a range in which it is allowed to rise even if it is restricted by the regulating body 12 .

In the embodiment of the present invention constructed as described above, the wiping of the window glass surface of the door 2 is carried out by the drive motor 9.
This is achieved by the vertical and reciprocating movement of the blade 5 linked to the controlled forward and reverse drive of However, if the wiper is operated while the window glass 2b is opened for a predetermined amount or more, or if the window glass 2b is opened for a predetermined amount or more while the wiper is in operation, the regulator 12 on the window glass 2b side will close to the wiper arm. 3, and thereby the blade 5 wipes within the permissible range within which it does not fly upwards from the window glass 2b.

As described above, in the present invention, the window glass surface can be wiped when necessary, and when the window glass 2b is opened more than a predetermined amount, the operation is restricted and the blade 5 does not come off from the window glass 2b. Although it is designed to prevent this, the wiper motor is not controlled using a detection switch that detects the opening and closing of the window glass 2b, as in the past, but instead of controlling the wiper motor using a detection switch that detects the opening and closing of the window glass 2b. The wiping range of the blade 5 can be controlled by mechanical interference with the engaging piece 3b. Therefore, the structure can be significantly simplified and costs can be significantly reduced, and there is no risk of malfunction due to dust or rainwater entering the door, unlike those using detection switches, and the cost is high. It can be made reliable. Furthermore, when the window glass 2b opens more than a predetermined amount, the wiper operation is not immediately stopped, but the wiper wipes the window glass 2b as long as the blade 5 does not come off. Regardless of the weather, the window glass surface can always be kept wiped clean and in an optimal condition. Furthermore, in this case, even if the blade 5 stops midway for some reason, if the torque clutch 11 is pressed down strongly, the torque clutch 11 will be disengaged, so the blade 5 can be moved down together with the wiper arm 3 to a position where it will not get in the way. It can be displaced. Therefore, even in such a case, there is no problem that the view is obstructed by the blade 5 or that the window cannot be opened, which is extremely convenient.

It should be noted that the present invention is of course not limited to the above embodiment, and the torque clutch is not formed between the coupling body and the wiper arm as in the embodiment, but instead is formed between the coupling body and the actuating wire. The torque clutch may be formed between the wiper arm and the wiper arm, or the wiper arm may be divided and formed here.In short, it is sufficient that the torque clutch is provided in the power transmission path from the wiper drive means to the wiper arm. .

[Operations and Effects] In summary, the present invention is constructed as described above, and although the present invention is designed to wipe the openable window glass surface by the reciprocating action of the blade, there is no problem when the window glass is opened. In this state, the locking part of the wiper arm moving forward comes into contact with the regulating body on the window glass side, and further wiping operation is restricted, and at this time, the wiper arm becomes free from the wiper drive means. Thus, the blade wipes within the permissible range within which it does not come off the window glass. Therefore, the mechanism for preventing the blade from coming off can be constructed using only a mechanical mechanism, without using a complicated detection switch that detects the opening and closing of the window glass as in the past, and as a result, the structure It is possible to significantly reduce the cost by significantly simplifying the process, and it also has high reliability because there is no risk of malfunction due to dust or rainwater entering the door, unlike those using detection switches. It can be equipped with the following. Moreover, with this device, when the window glass opens more than a predetermined amount, the wiper operation does not immediately stop as in the case of conventional wipers, and the wiper can continue wiping the window glass as long as the blade does not come off. The window glass surface can always be kept in an optimal state of being wiped clean regardless of the open state of the window.

[Brief explanation of the drawing]

The drawings show an embodiment of the wiper device for opening/closing windows according to the present invention, in which FIG. 1 is a front view of the side wiper device, FIG. 2 is a cross-sectional view of the main part of the door, and FIG. FIG. 4 is a side view of the wiper arm, FIG. 4 is a sectional view of the torque clutch portion, and FIGS. 5A and 5B are side views of essential parts for explaining the action. In the figure, 1 is a wiper device, 2 is a door, 2b is a window glass, 3 is a wiper arm, 5 is a blade, 11 is a torque clutch, and 12 is a regulator.

Claims (1)

[Scope of utility model registration request] In a wiper device that wipes openable window glass with a blade provided at the tip of a wiper arm that reciprocates in response to power from a wiper drive means, the wiper arm is freely driven by the wiper drive means. On the other hand, a locking part provided on the wiper arm side is in contact with the window glass side to prevent the blade from wiping beyond the tip edge of the window glass that opens when the wiper arm moves forward. A wiper device for an opening/closing window, characterized in that a wiper arm is free with respect to a wiper drive means and is provided with a regulating body that restricts further forward movement.