JPH0792538A - Wiper device - Google Patents

Abstract

PURPOSE:To provide a wiper device for preventing the wiped water droplets, etc., from being restuck to a glass. CONSTITUTION:When an arm 18 is rocked and approaches a retreat block BOA, a guiding roller 28 is raised along the tapered surface of the retreat block 30A, guided to its flat part and temporarily stopped. Thus, a wiper blade 24 is retreated from a front frame 14 and simultaneously, the water droplets, etc., wiped by the wiper bade 24 leave therefrom and are retained in the position. When the arm 18 is rocked in an opposite direction, the guiding roller 28 is guided to a guiding plate 32A from the flat part and onto the front frame 14. Thus, the wiper blade 24 is retreated from the front frame 14 and passes the position where the water droplets, etc., are retained in this state, so that the wiped water droplets, etc., are not moved together with tone wiper blade 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device, and more particularly to a wiper device for wiping off water drops and the like adhering to the protective glass of a TV camera lens.

[0002]

2. Description of the Related Art In a television camera used outdoors, if water drops, mud or dust adheres to the protective glass mounted on the front surface of the taking lens, it interferes with taking pictures, so the taking photographer wipes it off each time. However, when the TV camera is operated remotely, the photographer cannot wipe the protection glass even if the protection glass becomes dirty.

Therefore, in order to eliminate such a problem, a wiper device shown in FIG. 15 disclosed in Japanese Utility Model Laid-Open No. 3-59776 has been proposed. The wiper device 1
Is provided inside the hood 3 attached to the front surface of the television camera housing 2, and a wiper blade 5 as a wiper member is attached to the tip of the arm 4 swingably around a fulcrum 5a.

When the drive motor 7 swings the arm 4 with the base end portion 6 as a fulcrum, the wiper blade 5 reciprocates on the front surface of the protective glass 8 as shown by the chain double-dashed line in the figure, so that the protective glass is protected. It is possible to wipe off water droplets and the like adhering to 8. Therefore, by remotely controlling the drive motor 7, the dirt on the protective glass 8 can be wiped off even at a position away from the television camera.

[0005]

However, in the conventional wiper device 1, the water droplets wiped off by the wiper blade 5 collect at both ends of the moving range of the wiper blade 5, and the wiper blade 5 moves in the opposite direction. At times, there is a drawback that the accumulated water droplets and the like move along with the wiper blade 5 and reattach to the protective glass 8.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a wiper device in which wiped water drops and the like do not reattach to the glass.

[0007]

In order to achieve the above object, the present invention provides a wiper device for reciprocally moving a wiper member to wipe off water droplets and the like adhering to glass, at both ends of the moving range of the wiper member. And a retracting member for retracting the moved wiper member from the surface of the glass is provided, and the wiper member moving in the opposite direction from the retracting member is retracted from the surface of the glass more than the retracted position of the wiper member. It is characterized in that a guide member for guiding the inside of the moving range and guiding on the surface of the glass is provided.

[0008]

According to the present invention, when the wiper member moves to both ends of the movement range of the wiper member, the wiper member is retracted from the surface of the glass by the retracting member, so that the wiped water droplets and the like are separated from the wiper member. . Then, when the wiper member moves in the opposite direction from the retracting member, the wiper member moves from the retracted position of the wiper member in the state of being retracted from the surface of the glass by the guide member, that is, from the position where the wiped water droplets and the like are accumulated. Is guided inside and is guided on the surface of the glass.

Thus, according to the present invention, even if the wiper member moves in the opposite direction, the wiped water droplets and the like do not move along with the wiper member, so that the water droplets and the like can be prevented from reattaching to the glass.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a wiper device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a front view of a television camera housing to which a wiper device according to the present invention is attached. The wiper device 10 is attached to a side of a protective glass 16 fixed to a front frame 14 of a television camera housing 12. The protective glass 16 is provided at a position corresponding to the front surface of the taking lens of a TV camera (not shown) installed in the TV camera housing 12.

The lower end 18A of the arm 18 of the wiper device 10 is connected to the rotating shaft 22 of the motor 20 shown in FIG. 2, and the driving force from the motor 20 causes the arm 18 to move from the position indicated by A in FIG. 1 to B in FIG. It is rocked back and forth within the range of the position indicated by. A wiper blade 24, which is a wiper member, is fixed in the longitudinal direction of the arm 18 as indicated by a dotted line in the figure. The wiper blade 24 reciprocates on the surface of the protective glass 16 by the swing of the arm 18, and can wipe off water droplets and the like adhering to the protective glass 16.

As shown in FIG. 2, the lower end 18A of the arm 18 is biased toward the protective glass 16 by the biasing force of the spring 26 attached to the rotary shaft 22. Therefore, the wiper blade 24 reciprocates while being pressed by the protective glass 16. Further, as shown in FIG. 1, a guide roller 28 is rotatably provided on the upper end portion 18B of the arm 18. The guide roller 28 is pressed against the front frame 14 of the television camera housing 12 by the urging force of the pulling 26, and
The arm 18 swings to move on the front frame 14 while rotating.

On the other hand, at both ends of the moving range of the wiper device 10, as shown in FIGS.
A and 30B and guide plates 32A and 32B are provided. The retraction blocks 30A and 30B are the wiper device 1
The guide roller 28 of the wiper device 10 formed in a trapezoidal shape having the tapered surfaces 34A and 34B inside the moving range of 0 is guided to the upper flat portions 36A and 36B via the tapered surfaces 34A and 34B. be able to.
As a result, the wiper blade 24 shown in FIG. 1 moves in a direction in which the arm 18 moves away from the front frame 14 against the biasing force of the spring 26 shown in FIG. To retract from the front frame 14.

The guide plates 32A and 32B are provided inside the moving range of the wiper device 10 with respect to the retract blocks 30A and 30B. In addition, the guide plate 32
A and 32B are swingably supported by shafts 38A and 38B, and the guide roller 2 is attached to the front frame 14.
It is provided with a gap through which 8 can pass. Further, the guide plate 32A is urged in the counterclockwise direction in FIG. 3 with the shaft 38A as the fulcrum by the urging force of a spring (not shown), and the guide plate 32B is urged in the clockwise direction in FIG. 4 with the shaft 38B as the fulcrum. It is energized.

Next, the operation of the wiper device configured as described above will be described with reference to FIGS. First, when the arm 18 of the wiper device 10 swings counterclockwise in FIG. 1 and approaches the retract block 30A, the guide roller 28 moves along the taper surface 34A of the retract block 30A as shown in FIG. Rise. And
The guide roller 28 pushes up the guide plate 32A against the biasing force of the spring as shown in FIG. 6, and is guided by the flat portion 36A of the retract block 30A as shown in FIG. Also, the guide plate 32A
Is returned to the original position shown in FIG. 5 by the biasing force of the spring. As a result, the wiper blade 24 shown in FIG.
Is retracted from the front frame 14, so that the water droplets wiped off by the wiper blade 24 are separated from the wiper blade 24, that is, the position where the wiper blade 24 is retracted from the front frame 14.

Next, when the arm 18 swings clockwise in FIG. 1, the guide roller 28 moves from the flat portion 36A of the retract block 30A to the guide plate 32 as shown in FIG.
Guided to the upper surface 40A of A. As a result, the wiper blade 24 is retracted from the front frame 14 and, after passing through the position where water droplets and the like are accumulated, the guide plate 32A is urged by a spring as shown in FIG. By swinging in the clockwise direction against the front frame 14
Guided above. The wiper blade 24 guided on the front frame 14 moves on the protective glass 16 shown in FIG. 1 by the swing of the arm 18, and wipes off water droplets and the like adhering to the protective glass 16.

As a result, water droplets and the like wiped off by the wiper blade 24 do not move along with the wiper blade 24 and therefore do not reattach to the protective glass 16. Next, when the arm 18 approaches the retreat block 30B, the guide roller 28 rises along the tapered surface 34B of the retreat block 30B as shown in FIG. 10, and the guide plate 32B as shown in FIG. It pushes up against the biasing force of the spring, and is guided by the flat portion 36B of the retract block 30B as shown in FIG. As a result, the wiper blade 24 shown in FIG. 1 retracts from the front frame 14, so that water droplets and the like wiped off by the wiper blade 24 leave the wiper blade 24 and collect at that position.

Next, when the arm 18 swings counterclockwise in FIG. 1, the guide roller 28 is guided from the flat portion 36B of the retract block 30B to the upper surface 40B of the guide plate 32B as shown in FIG. As a result, the wiper blade 24 is guided to the front frame 14 as shown in FIG. 14 after passing through the position where water droplets and the like have accumulated in the state of being retracted from the front frame 14. The wiper blade 24 guided on the front frame 14 moves on the protective glass 16 shown in FIG. 1 by the swing of the arm 18, and wipes off water droplets and the like adhering to the protective glass 16.

As a result, the water droplets wiped off by the wiper blade 24 do not move along with the wiper blade 24 and therefore do not reattach to the protective glass 16. In the present embodiment, the wiper blade 24 is retracted from the front frame 14 to remove the water droplets wiped off by the wiper blade 24 from the wiper blade 24, but the present invention is not limited to this. Draining members for forcibly removing the wiped water droplets may be provided at both ends of the moving range of the wiper device 10.

Further, although the wiper device applied to the television camera housing has been described in the present embodiment, the present invention is not limited to this, and the wiper device attached to a passenger car or the like can be applied.

[0021]

As described above, according to the wiper device of the present invention, the wiper member is retracted from the surface of the glass by the retracting members provided at both ends of the moving range of the wiper member, and the surface of the glass is guided by the guide member. Since the wiper member is guided to the inside of the range of movement of the wiper member in the retracted state and is guided to the surface of the glass, the wiped water droplets and the like do not move along with the wiper member. Therefore, in the wiper device of the present invention, the wiped water droplets and the like do not redeposit on the glass.

[Brief description of drawings]

FIG. 1 is a front view of a wiper device according to the present invention applied to a television camera housing.

FIG. 2 is an enlarged cross-sectional view showing a mounted state of a base end portion of a wiper device according to the present invention.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG.

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG.

FIG. 5 is an operation explanatory diagram of the wiper device according to the present invention.

FIG. 6 is an operation explanatory diagram of the wiper device according to the present invention.

FIG. 7 is an operation explanatory view of the wiper device according to the present invention.

FIG. 8 is an operation explanatory view of the wiper device according to the present invention.

FIG. 9 is an operation explanatory view of the wiper device according to the present invention.

FIG. 10 is an operation explanatory view of the wiper device according to the present invention.

FIG. 11 is a diagram for explaining the operation of the wiper device according to the present invention.

FIG. 12 is an operation explanatory diagram of the wiper device according to the present invention.

FIG. 13 is an operation explanatory view of the wiper device according to the present invention.

FIG. 14 is an operation explanatory view of the wiper device according to the present invention.

FIG. 15 is an explanatory view showing an embodiment of a conventional wiper device.

[Explanation of symbols]

 10 ... Wiper device 12 ... Television camera housing 16 ... Protective glass 18 ... Arm 24 ... Wiper blade 26 ... Spring 30A, 30B ... Retraction block 32A, 32B ... Guide plate

Claims (1)

[Claims] 1. A wiper device for reciprocally moving a wiper member to wipe water droplets and the like adhering to glass, at a both end of a moving range of the wiper member, withdrawing the wiper member having moved from the surface of the glass. A member is provided, and the wiper member moving in the opposite direction from the retracting member is guided to the inside of the moving range from the retracted position of the wiper member in the state of being retracted from the surface of the glass and is guided to the surface of the glass. A wiper device comprising a guide member.