JP2000236558A - Structure for fitting degaussing coil to cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the fitting of a degaussing coil and to reduce the number of parts by integrally providing plural protrusions at the peripheral edge parts of an explosion proof band wound to the tubular body of a cathode-ray tube and fitting the degaussing coil to the plural protrusion so that it is attached to the explosion proof band. SOLUTION: Plural protrusions 3 are integrally and protrusively provided at the peripheral edge part of an explosion proof band 2 wound to the tubular body 10 of a cathode-ray tube 1. A degaussing coil 4 is attached to the explosion proof band 2 and it can be fitted to the plural protrusions 3. The plural protrusions 3 have elasticity and the degaussing coil 4 is fitted to the outer surface of the tubular body 10 of the cathode-ray tube 1 with the elasticity of the protrusions 3 by pressing and holding. The tips of the plural protrusions 3 are bent and it is desirable that the degaussing coil 4 is hung and fitted to the bend parts at the tips of the plural protrusions 3. Since the degaussing coil 4 is fitted to the protrusions 3 of the explosion band 2 wound to the tubular body 10 of the cathode ray tube 1, fitting becomes easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for mounting a degaussing coil on a cathode ray tube.

[0002]

2. Description of the Related Art Conventionally, in order to attach a degaussing coil to a cathode ray tube, two upper ears of ears protruding outward from four corners of an explosion-proof band wound on the cathode ray tube are used. The upper part of the degaussing coil was hooked, and the lower part of the degaussing coil was attached to the surface of the cathode ray tube with tape. However, in this case, there is a problem that the work of attaching the degaussing coil is troublesome and difficult to perform.

A cathode ray tube described in Japanese Patent Application Laid-Open No. 63-221790 has a tube 1 as shown in FIG.
The demagnetizing coil 104 is attached in a state where the demagnetizing coil 104 is wound around the rear extending portions 103a of the upper and lower sides of the explosion-proof band 102 wound around the band 01. However, in this case, there is a problem that the length of the degaussing coil 104 is limited, and there is a problem that the material cost increases because the area of the rear extension 103a of the explosion-proof band 104 is large.

As shown in FIGS. 5A and 5B, a cathode ray tube disclosed in Japanese Utility Model Laid-Open Publication No. 55-5411 has a wire rod on the periphery of an explosion-proof band 205 wound around a tube 203. As shown in FIG. The demagnetizing coil 209 is attached by the reference numeral 208. However, in this case, since the degaussing coil 209 is attached with the wire 208, there is a problem that the attaching operation is troublesome, and the number of components increases because the wire 209 is used.

The cathode ray tube described in Japanese Utility Model Laid-Open No. 63-147481 is disclosed in FIGS. 6, 7 and 8 (a).
As shown in (b), in the cathode ray tube 301 to which the explosion-proof band 312 and the external magnetic shield member 313 are attached, the external magnetic shield member 313 to which the degaussing coil 304 is attached has the claw portion 315 and the funnel portion 30.
1f, and the claw portion 315 has an explosion-proof band 312.
The external magnetic shield member 313 is fitted to the engaging portion 316 provided on the mounting ear 314, and is integrally attached to the explosion-proof band 312. However, in this case, the claws 315 are provided on the external magnetic shield member 313 to which the degaussing coil 304 is attached, and the explosion-proof band 3 is provided.
It is necessary to provide the engaging portion 316 on the 12 mounting ears 314, and the structure is complicated and expensive, and there is a problem that the mounting operation is difficult and time-consuming.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a structure for mounting a degaussing coil on a cathode ray tube, in which the degaussing coil can be easily mounted and the number of parts is small. It is an object.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of projections are integrally formed on a peripheral portion of an explosion-proof band wound around a cathode ray tube. And
The demagnetizing coil is attached to the plurality of protrusions so as to be attached to the explosion-proof band.

According to a second aspect of the present invention, the plurality of projections have elasticity, and the degaussing coil is pressed and held by the elasticity of the projections. The invention according to claim 3 is characterized in that the tips of the plurality of projections are bent, and the degaussing coil is hooked and attached to the bent portions at the tips of the plurality of projections. . The invention according to claim 4 is characterized in that a plurality of projections are provided at a plurality of locations of the explosion-proof band, and a degaussing coil is fitted and attached above and below these projections. And

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a structure for mounting a degaussing coil to a cathode ray tube according to the present invention will be described below with reference to the drawings. 1A and 1B show a mounting structure of a degaussing coil to a cathode ray tube according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view thereof, FIG. 1B is a rear view thereof, and FIG. FIG. 2 is a schematic cross-sectional view of a main part of the degaussing coil mounting structure of FIG.

As shown in FIGS. 1 (a) and 1 (b), a structure for mounting a degaussing coil to a cathode ray tube according to the first embodiment is provided at the periphery of an explosion-proof band 2 wound around a tube 10 of a cathode ray tube 1. A plurality of protrusions 3 are integrally provided, and the degaussing coil 4 is
And is attached to the plurality of protrusions 3. Further, the plurality of projections 3 have elasticity, and the demagnetizing coil 4 is pressed and held on the outer surface of the tube 10 of the cathode ray tube 1 by the elasticity of the projections 3.

Further, as shown in FIG.
Is bent, and the demagnetizing coil 4 is preferably hooked and attached to the bent portion 31 at the tip of each of the plurality of protrusions 3. As described above, the degaussing coil 4 is attached to the plurality of protrusions 3 protruding from the periphery of the explosion-proof band 2 wound around the tube 10 of the cathode ray tube 1 so as to be attached to the explosion-proof band 2. Therefore, the mounting of the degaussing coil 4 is easy, and a wire or the like for mounting the degaussing coil 4 is not required, so that the number of parts can be reduced.

Further, since the degaussing coil 4 is pressed and held on the outer surface of the tube 10 of the cathode ray tube 1 by the elasticity of the projection 3, the degaussing coil 4 can be reliably held in the mounted state. As a result, it is possible to prevent the degaussing coil 4 from accidentally coming off. If the tips of the plurality of protrusions 3 are bent and the demagnetizing coil 4 is hooked and attached to the bent portion 31 at the tip of the plurality of protrusions 3, the degaussing coil 4 may come off and come off. Absent.

FIG. 3 shows a mounting structure of a degaussing coil to a cathode ray tube according to a second embodiment, wherein (a) is a perspective view, (b) is a rear view, and (c) is a partial plan view of a main part thereof. It is. As shown in FIGS. 3 (a) and 3 (b), the mounting structure of the degaussing coil to the cathode ray tube of the second embodiment has three rows at the upper left and right and the lower central part of the explosion-proof band 2 respectively. A projection 3 is provided. Then, as shown in FIG. 3 (c), the degaussing coil 4 is hooked and fitted on the upper and lower sides of these three projections 3 and attached. According to the structure for mounting the degaussing coil on the cathode ray tube of the second embodiment, the degaussing coil 4 is hooked and fitted on the upper and lower sides of the three projections 3, respectively, so that the degaussing coil 4 is hard to come off. It can be securely attached and fixed.

[0014]

As described above, according to the first aspect of the present invention, the demagnetizing coil is attached to the explosion-proof band on the plurality of projections projecting from the periphery of the explosion-proof band wound around the tube of the cathode ray tube. , The mounting of the degaussing coil is easy, and a wire or the like for mounting the degaussing coil is not required, so that the number of parts can be reduced.

According to the second aspect of the present invention, since the degaussing coil is pressed and held by the elasticity of the projection, the degaussing coil can be securely held in the mounted state, and the degaussing coil can be held. Can be prevented from accidentally coming off. According to the third aspect of the present invention, the tips of the plurality of projections are bent, and the demagnetizing coils are hooked and attached to the bent portions at the tips of the plurality of projections. Will not come off.

According to the fourth aspect of the present invention, the degaussing coil is hardly detached because the degaussing coil is hooked and fitted on the upper and lower sides of the plurality of projections provided at a plurality of locations of the explosion-proof band. It can be securely attached and fixed.

[Brief description of the drawings]

FIG. 1 shows a mounting structure of a degaussing coil to a cathode ray tube according to a first embodiment of the present invention, and FIG.

FIG. 2 is a schematic sectional view of a main part of a structure for attaching a degaussing coil to a cathode ray tube according to the first embodiment.

3A and 3B show a mounting structure of a degaussing coil to a cathode ray tube according to a second embodiment, wherein FIG. 3A is a perspective view, FIG. 3B is a rear view, and FIG. 3C is a partial plan view of a main part thereof. .

FIG. 4 is a perspective view showing a first example of a conventional cathode ray tube.

FIGS. 5A and 5B show a second example of a conventional cathode ray tube, in which FIG. 5A is a partially cutaway side view, and FIG. 5B is an enlarged sectional view showing a mounting portion of the degaussing coil.

FIG. 6 is an exploded perspective view showing a third example of a conventional cathode ray tube.

FIG. 7 is an exploded perspective view showing a third example of a conventional cathode ray tube.

8A and 8B show a mounting structure of an external magnetic shield member and an explosion-proof band in a third example of a conventional cathode ray tube, wherein FIG. 8A is a partially exploded perspective view, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cathode ray tube 10 Tube 2 Explosion-proof band 3 Projection part 31 Bent part 4 Degaussing coil

Claims (4)

[Claims] 1. An explosion-proof band wound around a tube of a cathode ray tube having a plurality of projections integrally protruding from a peripheral portion thereof, and a degaussing coil attached to the plurality of projections so as to be attached to the explosion-proof band. A structure for mounting a degaussing coil to a cathode ray tube, characterized in that: 2. The plurality of projections have elasticity,
2. The structure for mounting a degaussing coil to a cathode ray tube according to claim 1, wherein said degaussing coil is pressed and held by elasticity of said projection. 3. The method according to claim 1, wherein tips of the plurality of projections are bent, and the demagnetizing coils are hooked and attached to bent portions of the tips of the plurality of projections. 3. A structure for attaching a degaussing coil to the cathode ray tube according to 2. 4. The explosion-proof band according to claim 1, wherein a plurality of protrusions are provided at a plurality of positions, and degaussing coils are fitted on and attached to the protrusions above and below the protrusions. 3. A structure for attaching a degaussing coil to the cathode ray tube according to 1 or 2.