JPH0537616U - Wiper device - Google Patents

Abstract

(57) [Summary] [Object] To provide a wiper device for suppressing permanent deformation of a blade rubber of a wiper blade. A wiper blade 2 for wiping a window panel 3 is attached to the tip of a wiper arm 1 rotated by a wiper motor 11, and when a wiper switch is turned on, the wiper motor 11 causes the wiper blade to be wiped through the wiper arm 1. 2 reciprocates between the upper reversal position B and the stop position A, and when the wiper switch is turned off, the wiper blade 2 returns to the stop position A and is stopped. Alternately repeat the case where the wiper blade 2 that has moved from the position B side stops without exceeding the stop position A and the case where the wiper blade 2 exceeds the stop position A and then reverses and returns to the stop position A to stop. It has a control device 12 for controlling the wiper motor 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiper device used in automobiles, ships, etc., and more particularly to a wiper device that suppresses permanent deformation of a wiper blade.

[0002]

[Prior Art]

 Generally, conventional wiper devices include, for example, those shown in FIGS. 5 and 6. In this wiper device, the wiper arm 1 is swung at a certain rotation angle by a drive means (not shown), and the window panel 3 is wiped by the wiper blade 2 provided at the tip of the wiper arm 1. Has become.

The wiper blade 2 has a plurality of levers (not shown) and a blade rubber 4 (see FIG. 6) supported by these levers. The blade rubber 4 has a lip portion 4a slidably contacting the window panel 3, which is tiltably connected to a base portion 4b attached to a lever via a neck portion 4c. When the window panel 3 is wiped, as shown in FIG. 6, the lip portion 4a is inclined at a predetermined angle with respect to the window panel 3 to ensure the wiping performance.

When a wiper switch (not shown) is turned on, the wiper blade 2 reciprocates between a stop position A and an upper reversal position B in FIG. 5, so that the window panel 3 is wiped and the wiper switch is turned off. The wiper blade 2 returns to the stop position A and is stopped.

Examples of this type include those described on page 128 of “Kankaidou Co., Ltd., published in 1980,“ Automotive Engineering Complete Book, Vol. 10, Electrical Equipment, Body Equipment, Engine Parts ”. JP-A-57-66053, JP-A-57-178956, JP-A-61-247541 and JP-A-61-247542.

[0006]

[Problems to be solved by the device]

 However, in such a conventional device, when the wiper blade 2 is stopped, the lip portion 4a of the blade rubber 4 is always tilted and stopped in the same direction at the stop position A as shown in FIG. Therefore, in this state, permanent deformation easily occurs, and in such a case, the wiping performance deteriorates.

Therefore, an object of the present invention is to provide a wiper device that suppresses permanent deformation of the blade rubber of the wiper blade.

[0008]

[Means for Solving the Problems]

 This invention has been made in view of such a conventional problem, and a wiper blade for wiping a window panel is attached to a tip end portion of a wiper arm rotated by a drive means, and when the wiper switch is turned on, the drive means is driven. At the wiper device, the wiper blade reciprocates between the reverse position and the stop position via the wiper arm, and when the wiper switch is turned off, the wiper blade returns to the stop position and is stopped. Each time, the wiper blade moved from the reversal position side stops without exceeding the stop position, or the wiper blade reverses after exceeding the stop position and returns to the stop position to stop. The wiper device is provided with a control means for controlling the driving means so as to alternately repeat the above. It is set to.

[0009]

[Work]

 According to such means, when the wiper switch is turned on, the wiper arm is swung by the drive means within a certain rotation angle range, and the wiper blade provided at the tip of the wiper arm causes the wiper arm to move to the reverse position of the window panel. There will be a gap between the and stop position.

When the wiper switch is turned off, the wiper blade that has moved from the reverse position side stops at one point without exceeding the stop position. Next, when the wiper switch is turned on and off, the wiper blade, in turn, reverses beyond the stop position and returns to the stop position and stops. By repeating such a stopping operation alternately, the lip portion of the blade rubber stops in a state of alternately tilting in the opposite direction, so compared with the case of always tilting in one direction and stopping, Deformation is suppressed, and the wiping performance can be secured for a long period of time as compared with the past.

[0011]

【Example】

 The invention will be described below with reference to the drawings.

1 to 4 are views showing an embodiment of the present invention.

First, the structure will be described. Reference numeral 11 in FIG. 1 is a wiper motor as a driving means. The wiper motor 11 is driven to swing the wiper arm 1 and is attached to the tip end portion of the wiper arm 1. The window panel 3 is wiped by the wiper blade 2. The wiper motor 11 is of a direct current type, and is rotated in the normal and reverse directions by changing the direction of current flow by a control device 12 as a control means.

Then, first, second, and third sensors 13, 14, 15 for detecting the position of the wiper arm 1 are provided, and these sensors 13, 14, 15 are connected to the control device 12. The first sensor 13 detects the upper reversal position B of the wiper arm 1, the second sensor 14 detects the stop position A of the wiper arm 1, and the third sensor 15 detects the lower reversal position C. It is supposed to do.

The control device 12 is controlled as follows. That is, as shown in FIG. 3, when a wiper switch (not shown) is turned on in step 101, for example, a value of k = 1 is input in step 102, and 1 × (−1) = − 1. Next, in step 103, the wiper motor 11 is rotated in the normal direction, the wiper arm 1 is rotated upward from the stop position A, and in step 104, the position of the wiper arm 1 is detected by the first sensor 13. Then, in step 105, a reverse current is applied to the wiper motor 11 to reverse it. As a result, the wiper arm 1 is rotated downward, and in step 106, the position of the wiper arm 1 is detected by the second sensor 14. Then, in step 107, it is determined whether the wiper switch is on or off. When the wiper switch is on, the process returns to step 103, and steps 104, 105 and 106 are repeated.

On the other hand, when it is off, it is determined in step 108 whether K is larger or smaller than 0. Since k = -1 from step 102, which is smaller than 0, the routine proceeds to step 109, where the wiper motor 11 is stopped and the wiper blade 2 stops without exceeding the stop position A 1. In this state, for example, the lip portion 4a of the blade rubber 4 is tilted to one side and is in contact with the window panel 3 as shown by the solid line in FIG.

After that, when the wiper switch is turned on again in step 101, the value of k = −1 obtained in the previous operation is input in step 102, and (−1) × (−1) = 1 Becomes Then, in steps 103 to 107, the same operation as described above is performed, and when the wiper switch is turned off in step 107, it is determined in step 108 whether k is larger or smaller than 0. In this case, since k = 1 in step 102, which is larger than 0, the process proceeds to step 110. When the wiper motor 11 is driven in the inverted state, the wiper arm 1 is rotated further downward beyond the stop position A and moved to the third sensor 15, the third sensor 15 outputs a signal. This signal causes the wiper motor 11 to rotate in the normal direction in step 111, and when the wiper arm 1 moves to the stop position A in step 112, a signal is output from the second sensor 14 and the wiper motor 11 in step 113. Is stopped. In this state, as shown by the chain double-dashed line in FIG. 4, the lip portion 4a is inclined and is in contact with the window panel 3.

As described above, every time the wiper switch is turned off, the lip portion 4a repeatedly stops in the state shown by the solid line in FIG. 4 and the state shown by the chain double-dashed line. It never leans and stops. Therefore, when the lip portion 4a is inclined to one side, the degree of permanent deformation is small, and good wiping performance can be obtained for a long period of time.

[0019]

[Effect of the device]

 As described above, according to the present invention, every time the wiper switch is turned off, the wiper blade moved from the reverse position side does not exceed the stop position and stops as it is, and after the stop position is exceeded. By providing the control means for controlling the driving means so as to alternately repeat the case of reversing and returning to the stop position to stop, the lip portion of the blade rubber stops alternately in the state of being inclined in the opposite direction. Compared with the one that always tilts in only one direction and stops, permanent deformation is suppressed, and the wiping performance can be secured for a long period of time, which is a useful effect in practice.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a wiper device of the present invention.

FIG. 2 is a block diagram of a wiper device of the same embodiment.

FIG. 3 is a flowchart of the control device of the same embodiment.

FIG. 4 is a cross-sectional view showing a blade rubber in a stop position showing the same embodiment.

FIG. 5 is an explanatory diagram showing a wiping pattern by a wiper device.

FIG. 6 is a sectional view corresponding to FIG. 4 showing a conventional example.

[Explanation of symbols]

 1 Wiper Arm 2 Wiper Blade 3 Window Panel 4 Blade Rubber 4a Lip Part 11 Wiper Motor (Drive Means) 12 Control Device (Control Means) A Stop Position B Upper Reverse Position (Reverse Position)

Claims (1)

[Scope of utility model registration request] 1. A wiper blade for wiping a window panel is attached to a tip end portion of a wiper arm rotated by a driving means, and when the wiper switch is turned on, the wiper blade is reversed by the driving means via the wiper arm. In a wiper device that reciprocates between a stop position and a wiper switch, and when the wiper switch is turned off, the wiper blade returns to the stop position and is stopped, each time the wiper switch is turned off, the wiper blade is moved from the reverse position side. Control means for controlling the driving means so as to alternately repeat a case where the wiper blade stops without exceeding the stop position and a case where the wiper blade exceeds the stop position and then reverses and returns to the stop position to stop. A wiper device characterized by being provided.