JPH0143811Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an image pickup tube yoke assembly, and relates to a contact in which a contact piece for an electrode connection portion and a tongue piece for centering are integrated.

Conventionally, various methods have been devised and implemented as methods for centering an image pickup tube in a yoke assembly for an image pickup tube in which electrode leads are parallel to the optical axis and extend outward from the rear end surface. There are the following. That is, a plurality of centering tongues integrally molded with the coil bobbin are provided around the glass circular surface of the imaging tube, and the centering tongues are tightened with a metal band or the like to fix the imaging tube and perform centering. Or, by attaching a rubber ring or a plurality of rubber tongue pieces to the glass circumferential surface of the image pickup tube, and tightening the rubber ring or rubber tongue pieces together with a coil bobbin from the periphery, the image pickup tube is fixed and centered, etc. However, both methods have some drawbacks. Since the tongue piece integrated with the coil bobbin is mostly a resin molded product, it deforms when exposed to high temperatures, which causes the image pickup tube to be fixed in a wrong position, resulting in poor centering accuracy and poor registration. Moreover, the image pickup tube may be destroyed if it is tightened too much. In the case of rubber rings and rubber tongues, it is difficult to improve centering accuracy due to variations during manufacturing and differences in tightening force. As shown in Fig. 1, in the case of an image pickup tube 3 having an electrode connection part 5 on the side surface of the rear end, there is a restriction on the space for installing tongues, rubber rings, etc. for centering, so the image pickup tube must be fixed and centered. It is necessary to devise a method for dispensing. As for the known ones,
There is a method that utilizes the elasticity of the contact piece 2 that contacts the electrode connection part 5 on the side of the image pickup tube 3 to simultaneously perform electrical connection and centering while fixing the image pickup tube 3, but it also has drawbacks. . That is, since there is variation in the position of each electrode connection part 5, the pressure contact force between the contact piece 2 and the electrode connection part 5 is different, and it is difficult to improve the accuracy of centering. In addition, in order to fix the image pickup tube with the contact piece 2 and improve centering accuracy, the elasticity of the contact piece 2 must be made considerably strong, and the contact ability between the electrode connection part 5 and the contact piece 2 is not strong enough to withstand fine vibrations. It becomes weaker and causes electrical problems.

The present invention eliminates the above-mentioned drawbacks. The centering tongue piece 13 and the contact piece 12 shown in FIGS. 2 and 3
The contact 11 is an integrated contact 11. Contact piece 12
Since the centering tongue piece 13 and the centering tongue piece 13 are integrated and separated at the same time, it is possible to provide optimal elasticity for each role. In particular, the centering tongue piece 13 can be brought into direct pressure contact with the outer circumferential surface of the imaging tube, and by increasing the elasticity of the centering tongue piece 13, the image pickup tube 3 can be firmly fixed, improving the centering accuracy. I can do it. Further, since the contact piece 12 does not need to fix the image pickup tube 3, it can sufficiently cope with even small vibrations by providing it with appropriate elasticity.

As mentioned above, by using the contact integrated with the contact piece and centering tongue according to the present invention, the registration does not deteriorate even at high temperatures.
It has the advantage of being resistant to vibrations and being able to reduce costs to some extent.

[Brief explanation of drawings]

FIG. 1 is a partial vertical sectional view of a yoke assembly for an image pickup tube using conventional contacts, FIG. 2 is a partial vertical sectional view of a yoke assembly for an image pickup tube using contacts according to the present invention, and FIG. The figure shows a perspective view of the contact according to the present invention. 1: Contact, 2: Contact piece, 3: Image pickup tube,
4: Coil bobbin, 5: Electrode contact part, 11: Contact, 12: Contact piece, 13: Centering tongue piece, 1
4: Coil bobbin.

Claims (1)

[Scope of utility model registration request] In a yoke assembly for an image pickup tube that has an electrode connection portion on the rear side surface, a plurality of contacts are used in which a contact piece that contacts the electrode contact portion and a centering tongue piece that fixes the image pickup tube are integrated. Features a yoke assembly for image pickup tubes.