JPH056657U - Electron gun - Google Patents

Abstract

(57) [Abstract] [Purpose] In the process of fixing the ceramic parts to the electron gun assembly using a retainer, there are few burrs,
It is another object of the present invention to reduce the variation of the electrode spacing of the electron gun assembly due to the applied pressure. [Structure] The retainer is made of a spring material, and a part of the surface to be bonded to the ceramic component is cut and raised. [Effects] By using the above-mentioned retainer, it is possible to assemble with a smaller pressing force than before and it is not necessary to weld the retainer end portion, so a high-quality electron gun can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an electron gun incorporated in a cathode ray tube.

[0002]

[Prior Art]

 This will be described with reference to FIGS. 2, 3 and 5. In FIG. 5, 1 is a retainer, 2 is a ceramic component, 3 is a first electrode, 4 is a second electrode, 5 is a third electrode, 6 is a fourth electrode, and 7 is a bead for insulatingly holding the first to fourth electrodes. 3 is an electron gun assembly in which the first to fourth electrodes are insulated and held by the bead glass 7 in FIG. 3, and the retainer 1 is shown in FIG.

Description will be made with reference to FIGS. 2, 3, 4, 7, and 8. FIG. 4 shows a state in which the ceramic part 2 and the retainer 1 are put in the electron gun assembly 8. In order to fix the ceramic component 2 to the first electrode 3 of the electron gun assembly 8, the retainer 1 and the first electrode 3 are joined by resistance welding (upper electrode 11, lower electrode 9). (Fig. 7) At this time, the L1K interval in Fig. 8 is important, but the ceramic component 2 is not joined to the first electrode 3 and is sandwiched between the first electrode 3 and the retainer 1. It is fixed. Therefore, simply joining the first electrode 3 and the retainer 1 may cause the ceramic part 2 to move somewhat within the first electrode 3, and in order to completely fix it, pressure is applied by the pressurizer 10 and the welding point is shown. As shown in 7, the end of the retainer 1 on the side of the ceramic component 2 is caulked and welded.

[0004]

[Problems to be solved by the device]

 In the conventional assembly using the retainer 1, it is necessary to use the above means, and it is necessary to apply pressure and crimp welding. Due to deformation of the first electrode 3 due to pressure, L1K in FIG. There was a problem in high-precision assembly due to fluctuations in the L12 interval, fluctuations in the L34 interval due to deformation of the fourth electrode 6, and the like. Moreover, since the end portion of the retainer 1 is welded, burrs are easily generated, which is a problem.

The present invention has been made in order to solve the above-mentioned problems, and the pressing force can be set low, and the ceramic component 2 can be completely fixed without welding the end portion of the retainer 1. The purpose is to provide such retainer 1 parts.

[0006]

[Means for Solving the Problems]

 The retainer component according to the present invention uses a spring material.

[0007]

[Action]

 Since the retainer in this invention is made of a spring material, a small pressing force is required and there is no need to weld the retainer end. Therefore, the variation of the intervals L1K, L12, L34 in FIG. Become.

[0008]

【Example】

 Example 1. FIG. 1 shows a retainer component in this invention. FIG. 4 is a state diagram in which the ceramic part 2 and the retainer 1 are put in the electron gun assembly 8. FIG. 6 is an assembly state diagram for joining the retainer 1 and the first electrode 3 and fixing the ceramic component 2 in the first electrode 3.

The retainer component 1 has a partly cut-and-raised portion on the bonding surface with the ceramic component 2, and the retainer component 1 is bonded to the first electrode 3 to fix the ceramic component 2 by a relatively weak pressing force in the assembly process. By joining the retainer 1 and the first electrode 3 while the cut and raised portion of 1 is deformed and becomes flat, the ceramic component 2 is always pressed by the retainer 1 to the first electrode 3, Fixed completely.

[0010]

[Effect of the device]

 As described above, according to the present invention, since the ceramic component 2 can be fixed without welding the end portion of the retainer 1 and with a pressure force smaller than the conventional pressure, burrs are less likely to occur, and the interval variation (L1K, L12) can be reduced. , L34) with a small number of electron guns, it is possible to obtain a good quality electron gun.

[Brief description of drawings]

FIG. 1 is a retainer component according to an embodiment of the present invention.

FIG. 2 is a conventional retainer component.

FIG. 3 is an electron gun assembly.

FIG. 4 is a view showing a state where a retainer component according to an embodiment of the present invention is mounted on an electron gun assembly.

FIG. 5 is a state diagram in which a conventional retainer component is mounted on an electron gun assembly.

FIG. 6 is a view showing a state in which a retainer component according to an embodiment of the present invention is joined to an electron gun assembly.

FIG. 7 is a state diagram of joining a conventional retainer component to an electron gun assembly.

FIG. 8 is a view showing an electrode interval of an electron gun which becomes a problem in a process of inserting a ceramic component and a retainer into an electron gun assembly and joining the retainer component to the electron gun assembly.

[Explanation of symbols]

 1 retainer 2 ceramic parts 8 electron gun assembly

Claims (1)

[Claims for utility model registration] 1. An electron gun in which a retainer component used for fixing a ceramic component to an electron gun assembly is a spring material.