JPS58159074A - Fixing device of image pickup tube - Google Patents

Abstract

PURPOSE:To improve the quality, by interposing a doughnut-shaped elastic material between an imege pickup tube and coil parts and connecting and fixing them with a high coaxial degree. CONSTITUTION:When the inside diameter of the aperture part of a bobbin 4 is denoted as phiC and the outside diameter of a glass valve of an image pickup tube 1 is denoted as phiT, a doughnut-shaped elastic material 10 has >=phiC outside diameter and <=phiT inside diameter. Therefore, the elastic material 10 is fixed between a ring electrode 2 and a position setting part 11 of the bobbin 4. The elastic material 10 is compressed in the diameter direction by relations of inside and outside diameters, and the axis of coil parts 3 and that of the image pickup tube 1 coincide with each other accurately, and the front end part of the image pickup tube is fixed to parts 3 by the elastic material 10. When parts 3 and the image pickup tube 1 are fixed in this state in a rear end part 7 of the bobbin 4 by a clamping band, axes of them coincide with each other in the rear end part, and thus, a space length DELTAS between them is constant in any position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for integrating and fixing an image pickup tube and a coil component for the image pickup tube, and provides a device that can ensure the coaxiality of both and the fixation of the image pickup tube. The purpose is to

First, examples of conventional fixing devices for fixing an image pickup tube and a coil component using various combinations will be described with reference to FIGS. 1A to 1C.

The electromagnetic focusing/electromagnetic deflection (M-M) method is commonly used as a driving method for image pickup tubes.

There are electrostatic focusing/electromagnetic deflection (S-M) method and electromagnetic focusing/electrostatic deflection (M-8) method.

Corresponding to these driving methods, it is necessary to include only a deflection coil or a deflection coil and a focusing coil as coil components. In Figure 1, A and B are for the S-M method, and C is for the M-M method.
FIG. 4 is a detailed cross-sectional view when the image pickup tube and coil component for the system are integrated and fixed.

In A, 1 is an image pickup tube and 3 is a coil component.

The coil component 3 has a deflection coil 5 wound around a bobbin 4, and its outer periphery is magnetically shielded by a magnetic plate 6.

Further, a plurality of tongue portions 7 are provided at the rear end portion in contact with the image pickup tube 1.
is provided, and is fixed to the image pickup tube 1 with a tightening band 8. The fixing method is to insert the imaging tube 1 into the coil component 3 and fix it with a tightening band 8 at a position where the ring electrode 2 of the imaging tube 1 contacts the position setting convex portion 11 of the pobbin 4.

C shows the case of the M-M system, in which a focusing coil 9 is added to the coil component 3. The fixed force method is the same as in case A.

Further, B is of the S-M type similar to A, but the fixing method is to provide a plurality of tongue portions 7' in front of the deflection coil 6 and fix it with a tightening band 8. To make it even stronger,
The rear end of bobbin 4 (indicated by dashed line) as in A-C.
Sometimes used together.

By the way, as shown in the enlarged view in the first diagram, between the image pickup tube 1 and the coil component 3, there is a spatial distance of ΔS in terms of the allowable error dimension, so it is important to check whether the coaxiality of the two is particularly good. is an important issue, and image pickup tube 1 and coil parts 3
There is a problem in that the imaging characteristics deteriorate if the camera is installed with the camera at an angle.

When considering the coaxiality of the A-C fixing device from this point of view, various problems arise. First, in the case of A and C which are fixed at the rear end of the bobbin 4, if the distance between the ring electrode 2 and the fixed part is L, the image pickup tube 1 can be moved up to a maximum of θ2tanΔS/L with respect to the coil part 3. There is a risk of it tilting. On the other hand, in case of B, there is almost no problem if it is fixed at the front and rear of the bobbin 4, but if it is fixed only at the front end, it will be similar to the above case.

For these reasons, it is most preferable to fix the imaging tube 1 at the front and rear ends of the bobbin 4 as shown in B.

However, this structure can only be used in the S-M system which has only the deflection coil 6 as the coil component 3.

The reason is that the M-S method, which requires a focusing coil 9,
- In the M type, a long coil length is required as the focusing coil 9 due to the magnetic field, and the focusing coil 9 must be extended to the vicinity of the face glass 12 of the image pickup tube 1. This is because it is not possible to provide a structure in which a plurality of tongue pieces 7' are provided and fixed with the tightening band 8.

In view of this, the present invention provides a device that can fix an image pickup tube and a coil component with good coaxiality and with a simple configuration, regardless of the structure of the coil component depending on the drive method of the image pickup tube. It is aimed at I.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

In this device, as shown in FIG. 2, a donut-shaped elastic material 1o is interposed between the image pickup tube 1 and the coil component 3 when inserting the coil component 3 on the outer periphery of the image pickup tube 1. The feature is that it is made to do. Figure 3A,
H shows a detailed sectional view of the state in which both are integrated and fixed.

Here, A is a diagram showing the arrangement relationship among the donut-shaped elastic material 10, the image pickup tube 1, and the coil component 3.

If the inner diameter of the open portion of the bobbin 4 is φC2, and the outer diameter of the glass bulb of the image pickup tube 1 is φT, then the donut-shaped elastic member 1o has the relationship of outer diameter≧φC and inner diameter≦φT.

Therefore, by interposing the donut-shaped elastic material 1o, the donut-shaped elastic material 1o is fixed between the ring electrode 2 and the positioning convex portion 11 of the bobbin 4. Then, due to the relationship between the inner and outer diameters described above, the donut-shaped elastic material 10 is compressed in the radial direction, and the central axis of the coil component 3 and the central axis of the image pickup tube 1 exactly match, and the donut-shaped elastic material 10 is compressed in the radial direction. The front end of the imaging tube is fixed to the coil component 3 by the elastic material 10 . In this state, if the coil component 3 and the image pickup tube 1 are fixed with the decorative band 8 at the rear end 7 of the bobbin 4, the central axes of both will coincide at the rear end, so the spatial distance ΔS between the two will be is constant everywhere. With such a structure, the image pickup tube 1 is neither tilted nor moved in parallel, and can be integrated with the coil component 3 in an ideal state.

Further, FIG. 3B is an example showing an integrated state of the image pickup tube 1 and the coil component 3 in the case of the M-M system.

As is clear from these examples, since the donut-shaped elastic material 1o is located inside the opening of the bobbin 4, it was difficult to fix it in front of the imaging tube with the conventional electrode focusing type, but with this device, it is difficult to fix it in front of the imaging tube. It can be easily realized. of course,
As described above, it goes without saying that the present invention can be applied to all of the various driving methods of the image pickup tube.

Furthermore, according to the present device, the following effects can also be obtained.

First, when inserting the image pickup tube 1 into the coil component 3, in the conventional type, the ring electrode 2 is inserted into the protrusion 1 for positioning the bobbin 4.
1, so there is a risk of damaging the image pickup tube 1 if the insertion force is too large.
By interposing the o, the impact force can be greatly alleviated, so damage can be prevented.

Furthermore, the ring electrode 2 of the image pickup tube 1 is generally fixed by pressing using an indium, but if variations in the standard setting position of the ring electrode 2 occur during this process, the ring electrode 2 may Position setting convex portion 11 of bobbin 4
The positional relationship between the image pickup tube 1 and the coil component 3 is set at the position where the image pickup tube 1 and the coil component 3 hit, which causes the image pickup tube 1 and the coil component 3 to deviate from the optimal position. Since the elastic material 1o is interposed, even if the standard setting position of the ring electrode 2 in the image pickup tube deviates, if multiple types of donut-shaped elastic material 1o with different thicknesses t are prepared, the image pickup tube 1 It becomes possible to set the optimum position between the coil part 3 and the coil part 3.

As described above, according to the present invention, the image pickup tube and the coil components can be coupled and fixed with good coaxiality with a simple configuration, which is highly effective in improving quality.

4. Description of Drawings #q FIGS. 1A, B, C, and D are sectional views and enlarged sectional views of a conventional imaging tube fixing device, and FIG. 2 is a sectional view of the present invention.

1... Image pickup tube, 2... Ring electrode, 3
......Coil parts, 4...Bobbin, 11
. . . Position setting convex portion, 10 . . . Donut-shaped elastic material.

Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure @3■

Claims (1)

[Claims] A coil component for the image pickup tube is provided on the outer periphery of the image pickup tube, and a donut-shaped elastic material is interposed between the ring electrode of the image pickup tube and the image pickup tube position setting part in the bobbin opening of the coil component into which the ring electrode is inserted. An image pickup tube fixing device 0 characterized in that the image pickup tube and the coil component are integrated and fixed by the elastic force of the donut-shaped elastic material.