JPS62139536A - Color temperature filter switching device for video camera - Google Patents

Abstract

PURPOSE:To obtain an inexpensive switching device by sliding the spherical projection of an elastic piece part provided on a slide metallic fitting into a stopper hole bored in a lever holder. CONSTITUTION:A switching lever 6 is moved as shown by an arrow and then a filter fitting tool 1 also rotates arcuately around a pin 3 implanted in the lever holder 2 because a pin 5 implanted in the cut and raised part 6a of the lever 6 is inserted into a long hole 1a pierced to filter fitting tool 1. Further, when the lever 6 is moved as shown by an arrow, the slide metallic fitting 4 also moves at the same time and the spherical projection of the elastic piece part 4c provided to the metallic fitting 4 slides between stopper holes 2b formed in the holder 2, so that the spherical projection part slides in the stopper hole 2b at the time of moving to the stopper hole 2b. Then, the switching operation is completed while the spherical projection part slides in the stopper hole 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a color temperature filter switching device used in video cameras and the like.

2. Description of the Related Art The configuration of a color temperature filter switching device in a conventional video camera is shown in FIGS.

In FIG. 6, the filter mount 1 to which the color temperature filter is fixed is placed in the optical path of the imaging light by means of a fulcrum pin 3 planted in one side wall of the lever holder 2, which has a groove 2a opening upward. It is rotatably mounted between a first position located at the center and a second position located away from the optical path. Reference numeral 4 denotes a slide fitting 4 consisting of a sliding portion 4a that slides in contact with the bottom surface of the groove portion 2a, and a cut and raised portion 4b extending upward from the sliding portion 4a. The provided pin 6 is connected to the filter fitting 1.
The filter fitting 1 is inserted into a long hole 1a bored in the filter fitting 1 in response to sliding of the slide fitting 4 in the direction of the arrow.
The rotor rotates in an arc between the first position and the second position about the fulcrum.

As clearly shown in FIG. 6, the sliding portion 4a of the slide fitting 4 is connected to the switching lever 6 with a screw 7 through an elongated hole 2c provided in the bottom surface of the groove portion 2a of the lever holder 2. . That is, by moving the switching lever 6 in the direction of the arrow, the slide fitting 4 slides,
The filter fitting 1 is formed to rotate along with this sliding movement. Furthermore, a deep groove 6a is provided on the side surface of the switching lever 6. A sphere 8 and a spring 9 that serves to push the sphere 8 out are installed in the deep groove 6a, and the sphere 8 is constantly pressed against the side wall of the lever holder 2.

Further, as shown in FIG. 5, stopper holes 2b having a diameter smaller than the diameter of the sphere 8 are provided in the side wall of the lever holder 2 at predetermined intervals.

In the above configuration, by moving the switching lever 6 in the direction of the arrow, the slide fitting 4 is also moved at the same time, and the bin 5 planted in the cut and raised portion 4b of the slide fitting 4 is moved to the filter fitting 1. The long hole 1 bored in
a, the filter fitting 1 also rotates in an arc around the fulcrum pin 3 implanted in the lever holder 2. At that time, the sphere 8 slides between the stopper hole 2b bored in the lever holder 2, and when it moves to the stopper ib, it slides into the stopper hole 2b. It is put into scraps. The switching is completed when the spherical body 8 is inserted into the stopper hole 2b, and the state where the spherical body 8 is inserted into the stopper hole 2b is the lock point for switching.

Problems to be Solved by the Invention However, the conventional switching device that uses the force of a spring to insert the ball into one hole of the stopper requires precision machining due to the provision of a deep groove in the switching lever. In addition, the number of parts such as spheres and springs increased, resulting in high costs.

In view of the above-mentioned problems, the present invention provides an inexpensive switching device that reduces the number of parts that require precision machining and reduces the number of parts.

Means for Solving the Problems In order to solve the above-mentioned problems, the switching device of the present invention includes an elastic piece integrally provided on the slide fitting that also rotates the filter fitting according to the sliding position of the switching device. An engagement protrusion is provided in the center of the elastic piece, and an engagement recess that engages with the engagement protrusion is provided on the sliding surface on which the slide fitting slides.

Operation According to the above configuration, when the slide fitting is slid to a predetermined position, the engagement protrusion provided on the elastic piece integrally provided on the slide fitting engages the engagement protrusion provided on the sliding surface. Debris enters the recess, is stopped dynamically at that position, and filters are switched.

Embodiment Hereinafter, a color temperature filter switching device according to an embodiment of the present invention will be explained with reference to the drawings.

In FIG. 1, the filter mount 1 is configured such that the color temperature filter is positioned in the optical path of the imaging light by means of a fulcrum pin 3 installed on one side wall of the lever holder 2, which has a groove 2a opening upward as in the conventional case. The light beam is rotatably mounted between a first position where the light beam is located and a second position which is away from the optical path. Reference numeral 4 denotes a slide fitting that slides in contact with the bottom surface of the groove portion 2a, and the slide fitting 4 is made of, for example, a 0.6 mm thick iron plate by pressing or the like, as shown in an enlarged view in FIG. When molding, an elastic piece 4c extending in the sliding direction and a spherical protrusion 4d located approximately at the center of the elastic piece 4c are formed at the same time. Reference numeral 6 denotes a switching lever that is slidably provided on the bottom surface of the lever holder 2, and is connected to the slide fitting 4 with a screw 7 through a long hole 2c provided on the bottom surface of the lever holder 2. ing. A cutout 16a at the tip of the switching lever e
A pin 6 implanted in the filter fixture 1 is inserted into a long hole 1a bored in the filter fixture 1, and the filter fixture 1 is moved to the fulcrum bin 3 in response to sliding of the switching lever 6 in the direction of the arrow. It serves to rotate in an arc between the first position and the second position around .

In FIG. 2, stopper holes 2b are bored in the bottom surface of the lever holder 2 at predetermined intervals.

In the above configuration, by moving the switching lever 6 in the direction of the arrow, the pin 6 implanted in the cut and raised portion 6a of the switching lever 6 is inserted into the long hole 1a formed in the filter fitting 1. Since the filter fitting 1 is also inserted into the lever holder 2, the pin 3 is inserted into the lever holder 2.
Rotates in an arc around the center. Furthermore, when the switching lever 6 is moved in the direction of the arrow, the slide fitting 4 also moves at the same time, and the spherical protrusion 4d of the elastic piece portion 4C provided on the slide fitting 4 is drilled into the lever holder 2. When the spherical protrusion 4d moves to the stopper hole 2b, debris is introduced into the stopper hole 2b.

Switching is completed when the spherical protrusion 4d is inserted into the stopper hole 2b, and the lock point for switching is when the spherical protrusion 4d is slid into the stopper hole 2b. There is.

Effects of the Invention As described above, the switching device of the present invention has a structure in which switching is performed by sliding a sphere into a hole in a stopper using a conventional spring, in which the switching device uses a spherical projection on an elastic piece provided on a slide fitting. Switching is performed by sliding the lever into a stopper hole provided in the lever holder, eliminating the need for the conventional sphere and spring, and also eliminating the need for deep groove machining on the switching lever to install the sphere and spring. An inexpensive switching device can be realized.

[Brief explanation of drawings]

1 is a plan view of a color temperature filter switching device for a video camera according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1 seen from the input direction, and FIG. 3 is an enlarged view of the slide fitting. 4
The figures are a cross-sectional view taken along line xx' in FIG. 2, FIG. 6 is a plan view of a conventional color temperature filter switching device, and FIG. 6 is a cross-sectional view taken along line Y-Y' in FIG. 1... Filter mounting fixture, 2... Lever holder, 3... Fulcrum pin, 4... Slide metal fitting, 6... Pin, 6... Switching lever, 7... Screw, 8... Ball, 9
······spring. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure x x' Figure 3 Figure 4

Claims (1)

[Claims] Supporting a fixed filter mount for a color temperature filter and a movable support for the filter mount between a first position where the color temperature filter is located in the optical path of the imaging light and a second position away from the optical path. a support pin and a third support pin along the sliding surface.
a slide fitting held so as to be slidably movable between a position and a fourth position; a pin for rotating the filter fitting in response to sliding of the slide fitting; and the sliding surface of the slide fitting. an elastic piece part that is formed in a pair on a surface facing the and has an engaging protrusion in a part thereof, the engaging protrusion abuts the sliding surface, and the slide fitting is in the third and fourth positions. A color temperature filter switching device for a video camera, comprising an engagement recess provided on the sliding surface so as to engage with the engagement protrusion of the slide fitting located therein.