JP3463370B2 - Wiper device - Google Patents

Description

Description: 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 water droplets or the like adhered to a protective glass of a lens for a television camera. 2. Description of the Related Art A television camera used outdoors has a problem that if a waterdrop, mud or dust adheres to a protective glass attached to a front surface of a lens of the television camera, the photographing is hindered. ing. Alternatively, wiper devices incorporating a motor, such as the wiper device disclosed in Japanese Utility Model Laid-Open Publication No. 3-59776 and the device disclosed in Japanese Patent Application Laid-Open No. 5-68191, have been proposed. Are already in practical use. [0003] However, the wiper devices and the like disclosed in Japanese Utility Model Laid-Open Publication No. 3-59776 are electrically operated to drive the wipers using a motor. Consumes power. When using a TV camera outdoors, a battery may be used. When power is consumed for driving the wiper, there are drawbacks in that the usable time of the battery is shortened and an extra battery is required. The present invention has been made in view of the above circumstances, and has been made by a manual method which does not require a power supply, and which has a zoom,
An object of the present invention is to provide a wiper device that can be operated without affecting a normal camera operation such as focus. According to the present invention, in order to achieve the above object, the present invention is provided so as to be swingably provided near a protective glass attached to a front surface of a lens for a television camera, and to adhere to the protective glass. A wiper blade for wiping water drops and the like, an elastic member for urging the wiper blade in a direction to retract from the protective glass, one end of the wiper blade is detachably connected to the wiper blade, and the other end is connected to a cable operation member. A wire cable member for operating the cable operating member by pulling a wire to advance the wiper blade to the front surface of the protective glass against the urging force of the elastic member to wipe off water droplets or the like attached to the protective glass. And According to the present invention, when water drops or the like adhere to the protective glass, the wire cable is pulled, the tension is transmitted to the wiper blade via the wire cable, and the wiper blade is attached to the elastic member. Advance to the front of the protective glass against the power. Then release the wire cable that was pulled,
The tension of the wire is released, and the wiper blade is retracted from the protective glass by the urging force of the elastic member. By pulling / releasing the wire cable as described above, the wiper blade is reciprocally oscillated while utilizing the biasing force of the spring, thereby wiping water droplets and the like adhered to the protective glass. A preferred embodiment of a wiper device according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an example of a television camera device to which a wiper device 10 according to the present invention is attached. A television camera 18 and a lens housing 20 are mounted on a cam head 14 of the tripod 12. A hood 22 is mounted on the front surface of the lens housing 20, and a wiper device 10 described later is mounted inside the hood 22. In the vicinity of a grip 26 of an operation handle (pan bar) 24 connected to the cam head 14, an operation lever 28 is detachably attached together with an attachment 30 by an attachment screw 32. As will be described later, the wiper device 10 provided inside the hood 22 is connected to the operation lever 28 by a wire cable 34. FIG. 2 is an enlarged view of a front surface of a housing provided with the wiper device 10. The wiper device 10 is mounted inside the hood 22 fixed to the front surface of the housing 20 at a position adjacent to the protective glass 36. ing. The protective glass 36 is provided on the front surface of a not-shown television camera lens provided inside the housing 20. The wiper device 10 mainly includes a wiper blade 40, a spring 42, and a wire cable 34. The wiper blade 40 is substantially L-shaped (the substantially L-shaped
Arm 41) and a rubber blade 43. The arm 41 is a rotation fulcrum shaft 4 fixed to the hood 22.
4 so as to be able to swing back and forth. The long portion 41C of the arm 41 is connected to the inner wall of the hood 22 by a spring 42 and is urged in the retracting direction. On the other hand, a slit portion 46 is formed in the short portion 41D, and the clasp 48 of the wire cable 34 is inserted. The arm long portion 4 of the wiper blade 40
1C, an elongated rubber blade 43 has an arm elongated portion 4.
It is attached along the longitudinal direction of 1C. Food 22
Is formed with a slit 50 cut from the outer edge of the hood, and the fixing ring 52 of the wire cable 34 is inserted. The wire cable 34 is fixed to the hood 22 by inserting the fixing ring 52 into the slit 50, and the wire and the wiper blade 40 are connected by inserting the clasp 48 into the slit hole 46. As shown in FIG. 1, the other end of the wire cable 34 is connected to an operation lever 28 which is detachably mounted near a grip 26 of an operation handle (pan bar) 24, and is operated by operating the operation lever 28. The tension of 34 is transmitted to the wiper blade 40. Since the operating lever 28 is detachable via the mounting screw 32, when the wiper device is not required, the clasp 48 and the fixing ring 52 are detached from the slit holes 46 and 50, respectively, and further mounted. By loosening the screw 32 and removing the operation lever 28 and the attachment 30, the wire cable 34, the operation lever 28, and the like can be separated from the camera device. In the wiper device 10 configured as described above, when the operation lever 28 is gripped and the wire cable 34 is pulled, the arm short portion 41D connected by the clasp 48 is pulled down. Along with this movement, the wiper blade 40 swings around the rotation fulcrum shaft 44 in the direction of arrow A in FIG. 2 against the urging force of the spring 42. When the operating force of the operating lever 28 that has been pulled is released, the wire tension of the wire cable 34 is released, and the wiper blade 40 is swung in the direction of arrow B in FIG. Returned to position. Thus, wiper blade 4
As the 0 reciprocates, water droplets and the like attached to the protective glass 36 are wiped off. The embodiment shown in FIG. 3 corresponds to the wiper blade 4 shown in FIG.
2, the same or similar members in the embodiment of FIG. 2 are given the same numbers, and the description is omitted. In the embodiment of FIG. 3, the arm short section 4 of the wiper blade 40 is used.
The direction of the slit hole 47 formed in 1D is changed by about 90 degrees with respect to the direction of the slit 50 formed in the hood 22 as shown in FIG. Along the slit 50, the wire cable 34
After the fixing ring 52 is inserted, the clasp 48 is inserted along the slit hole 47, so that the wire cable 34 is hardly detached from the slits 50 and 47.
Further, the slit hole 47 formed as described above has a step in which a portion where the clasp 48 is accommodated is depressed in the thickness direction, and the inserted clasp 48 stays in the recess.
By doing so, the wire cable 34 is pulled,
Even when the arm short portion 41D moves downward, the catch 4
8 does not fall out of the slit hole 47. In the embodiments shown in FIGS. 2 and 3, the wiper blade 40 has been described as having a substantially L-shape which is bent at about 45 degrees in order to show a mounting portion of the wiper device. If the angle is made smaller, the swing width of the wiper blade 40 can be further increased. In the above embodiment, the operation lever 28 is used as the cable operation member, but a foot pedal 60 may be used instead of the operation lever 28 as shown in FIG. FIG. 4 shows a foot pedal 60 as a mechanism for operating a wire. The pedal swinging portion 60A and the pedal bottom plate 60B are swingably connected at a swing fulcrum 62, and a return spring 64 is disposed. I have. Wire cable 3
4 is removably connected to the pedal swinging portion 60A, and the other end is connected to the wiper blade 40 of the wiper device 10 via a roller 66 provided on the pedal bottom plate 60B. still,
The wiper device 10 may be the embodiment of FIG. 2 or the embodiment of FIG. The foot pedal 60 is provided near the foot of the tripod 12 in FIG. This is so that the pedal 60 can be operated while operating the camera device with the pan bar 24. When the pedal 60 is depressed with the foot, the pedal swinging portion 60A swings in the direction of arrow E, the connected wire cable 34 is pulled, and the return spring 64 is contracted. At this time, the wiper blade 40 of the wiper device 10 of FIG. 2 connected by the wire cable 34 advances to the front of the protective glass against the urging force of the spring 42. Pedal swing part 6
When the foot is released from 0A, the pedal swing unit 6 of the pedal 60
0A is returned to the original position by the restoring force of the return spring 64, and the wiper blade 40 is retracted from the protective glass by the urging force of the spring 42. By repeatedly depressing / releasing the pedal as described above, the pulling / releasing operation of the wire cable is performed, and the wiper blade is swung back and forth to wipe off water droplets and the like adhering to the protective glass. As described above, according to the wiper apparatus of the present invention, the photographer manually operates the wire cable connected to the wiper blade, thereby utilizing the urging force of the spring. By oscillating the wiper blade, water droplets or the like attached to the protective glass can be wiped off. Therefore, power is not required for driving the wiper, so that the usable time of the battery of the camera is prolonged or an extra battery is not required. Further, since the wiper device according to the present invention can be attached to an ordinary camera device, the wiper device can be selectively disposed in a place where there is no influence on the operation of the camera. The wiper device can be operated without affecting the normal operation of the camera.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view of a television camera device on which a wiper device according to the present invention is mounted. FIG. 2 is a perspective view of a main part of the wiper device in FIG. FIG. 3 is a perspective view of a main part showing another embodiment of the present invention. FIG. 4 is a view showing a main part for describing a second embodiment of the wiper device according to the present invention. [Description of Signs] 10 Wiper device 22 Hood 24 Operation handle (pan bar) 26 Grip 28 Operation lever 34 Wire cable 36 Protective glass 40 Wiper blade 42 Spring 43 Rubber blade 44 Rotation Support shafts 46, 47 ... Slit hole 48 ... Clasp 60 ... Foot pedal

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Claims (1)

(57) [Claim 1] A wiper blade that is swingably provided in the vicinity of a protective glass attached to a front surface of a lens for a television camera and wipes water droplets or the like adhered to the protective glass. An elastic member that urges the wiper blade in a direction to retreat from the protective glass; one end is detachably connected to the wiper blade and the other end is connected to the cable operation member, and the cable operation member is operated by pulling a wire. And a wire cable member for advancing the wiper blade to the front surface of the protective glass against the urging force of the elastic member and wiping water droplets or the like adhered to the protective glass.