JPH0422607Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an attachment mechanism for a cathode ray tube for a viewfinder attached to a video camera.

[Background of the idea]

In a conventional video camera with a viewfinder, the cathode ray tube constituting the viewfinder is mounted directly using a rib or an elastic body on the case of the viewfinder, as shown in Japanese Utility Model Application Publication No. 53-14417, for example. It was. However, this had problems such as causing the cathode ray tube to shake and making it difficult to assemble the cathode ray tube into the case.

In addition, as a means to facilitate the centering work of the cathode ray tube screen during installation, for example,
As described in the above publication, a mounting member having a projection for tightening the head of a rectangular cathode ray tube has been devised.

However, this conventional technology is aimed at a rectangular cathode ray tube with a rectangular outer circumference, which requires a complicated manufacturing process, as a cathode ray tube for a viewfinder.
Furthermore, no consideration has been given to the problem of misalignment of the cathode ray tube in the viewfinder with a swinging mechanism due to forces in the rotating direction or in the axial direction.

[Purpose of invention]

The purpose of this invention is to be able to firmly hold a round cathode ray tube with a cylindrical outer circumference against rotational force or axial force, and to also be able to control the axial mounting position of the cathode ray tube. An object of the present invention is to provide a cathode ray tube mounting device for a viewfinder that is easy to install.

[Summary of the idea]

In order to achieve the above object, the present invention includes a cathode ray tube cover having a square hole in the center corresponding to the angle of view of a round cathode ray tube and groove-shaped ribs formed at both ends; and a cathode ray tube holder with flexible ribs around the hole;
A CRT metal fitting is arranged to wrap around the side of the flexible rib of the CRT holder and bends the rib inward, and a CRT rubber is provided to cover the side wall of the tube surface of the CRT. After inserting the CRT into the round hole and inserting both ends of the CRT holder into the grooved ribs of the CRT cover and slidingly attaching it to regulate the axial installation position of the CRT, the CRT fitting was tightened with a screw to hold the CRT. .

[Example of idea]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of the view finder of the present invention, and its internal structure is shown in FIGS. 2 to 4. 2 to 4, a cathode ray tube rubber 4 is placed over the side wall of the cathode ray tube 1, and a cathode ray tube holder 3 is passed through the hole from the rear of the cathode ray tube 1 and attached onto the cathode ray tube rubber 4. Next, attach the cathode ray tube fitting 2 that tightens the cylindrical part at the front of the cathode ray tube from the rear of the cathode ray tube cover 5, temporarily tighten the screws 6, and then insert it into the grooves on both sides of the cathode ray tube cover 5 and slide it to install it, and the position is determined. Tighten the screw at the correct position, and move the cathode ray tube holder 3 with the slit 7 in the direction of arrow A to firmly fix the cathode ray tube.

According to this embodiment, the cathode ray tube 1 is integrated with the cathode ray tube holder 3 by contacting the cathode ray tube rubber 4 and retracting the slit portion 7 of the cathode ray tube holder 3 using the cathode ray tube fitting 2. It is firmly held in both the axial direction.

Further, since the cathode ray tube holder 3 and the cathode ray tube cover 5 are attached using rail-shaped ribs and grooves, the attachment is easy.

[Effect of idea]

According to this invention, the cathode ray tube can be held very firmly against forces in the rotational direction or in the axial direction, so even when using a viewfinder with an oscillating mechanism, the screen can be held securely. This has the effect of eliminating problems caused by holding the cathode ray tube, such as bending.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the finder, Fig. 2 is an exploded perspective view of the assembly process of an embodiment of the present invention, and Fig. 3 is an exploded perspective view of the assembly process of an embodiment of the present invention.
The figures are a front view and a back view of the completed mounting device of the present invention, and FIG. 4 is a sectional view of FIG. 3. 1... Braun tube, 2... Braun tube fittings, 3
...Cathode ray tube holder, 4...Cathode ray tube rubber, 5
...CRT cover, 6...Screw, 7...Slit.

Claims (1)

[Claims for Utility Model Registration] A device for attaching a viewfinder cathode ray tube to a viewfinder having a cylindrical outer periphery, which has a rectangular hole in the center corresponding to the angle of view of the cathode ray tube and groove-like ribs at both ends. A cathode ray tube cover formed, a cathode ray tube holder having a round hole in the center and a deflectable rib provided around the hole, and the rib arranged to wrap around the side surface of the deflectable rib of the cathode ray tube holder. It is equipped with a cathode ray tube fitting that can be bent inward, and a cathode ray tube rubber that covers the side wall of the tube surface of the cathode ray tube, and after covering the cathode ray tube with the cathode ray tube rubber, it is inserted into the round hole of the cathode ray tube holder, and is inserted into the grooved rib of the cathode ray tube cover. A cathode ray tube mounting device for a viewfinder, characterized in that the cathode ray tube is held by inserting both ends of the cathode ray tube holder and slidingly mounting it to regulate the axial mounting position of the cathode ray tube, and then tightening the cathode ray tube fitting with a screw.