JP2003209853A - Apparatus for mounting degaussing coil and color display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mount apparatus for a degaussing coil with a small number of components and providing less fluctuation in the mount position. <P>SOLUTION: This invention provides the mount apparatus for the degaussing coil characterized in that the apparatus is provided with a cabinet front frame with a cathode ray tube mounted thereon, a plurality of fixed ribs extended in a tube axis direction of the cathode ray tube and projected toward the peripheral part of the cathode ray tube are formed to an inner circumferential part of the front frame, and recesses fitting to degaussing coil are provided to the fixed ribs. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching a degaussing coil to a cathode ray tube, and a color display device to which the degaussing coil is attached.

[0002]

2. Description of the Related Art Conventionally, in a color television receiver or a color display device using a cathode ray tube, a degaussing coil is attached to the cathode ray tube in order to prevent a shadow mask in the cathode ray tube from being magnetized by the earth's magnetism. There is. This degaussing coil is attached to the cone portion on the outer circumference of the cathode ray tube, and an alternating attenuation current is passed through the degaussing coil when the power is turned on to remove the magnetism magnetized in the shadow mask. As a result, it is possible to prevent the deviation of the convergence.

Generally, in a color television receiver,
The cathode ray tube is fixed to the front frame of the cabinet while the degaussing coil is temporarily fixed to the outer circumference of the cathode ray tube. The degaussing coil is composed of, for example, two coil parts attached to the upper part and the lower part of the cathode ray tube, and each coil part is formed into a substantially inverted trapezoidal shape by winding a lead wire which is a conductor a plurality of times. Insulating tape is wrapped around the circumference.

Since such a degaussing coil has some variations in the shape and length of the ring when it is manufactured, there is a problem in that it is displaced or loosened after being attached to the cathode ray tube. Therefore, after the degaussing coil is temporarily fixed to the cathode ray tube, the degaussing coil is fixed to the tube surface of the cathode ray tube with adhesive tape, or a tie band having a special structure is used for the lugs provided at the corners of the cathode ray tube. Are positioned and fixed.

However, when fixing with a tape, it is necessary to attach the tape to a plurality of positions of the degaussing coil, and even when using a binding band, the mounting work takes time and the workability is low. It had the drawback of being inferior.

Further, as shown in Japanese Utility Model Registration No. 3077825, a plate-like rib is integrally provided upright on the front surface of the cabinet, and a degaussing coil is sandwiched between the rib and the cathode ray tube. Although there is a structure, in the example described in this publication, since the degaussing coil is simply sandwiched between the rib and the cathode ray tube, there is a disadvantage that the position of the degaussing coil is easily displaced and the degaussing effect is reduced. It was

[0007]

As described above, in the conventional degaussing coil mounting device, since it is necessary to fix the degaussing coil by using the tape or the binding band, it takes a long time to carry out the mounting work.
There was a drawback that workability was poor. Also, in the structure in which a flat plate-shaped rib is erected upright on the front surface of the cabinet and the degaussing coil is sandwiched between this rib and the cathode ray tube, the position of the degaussing coil easily shifts and the degaussing effect decreases. There was a problem of doing.

The present invention solves the above-mentioned inconvenience, improves the mounting work, and enables the degaussing coil to be mounted without the need for special parts for mounting, and the degaussing coil mounting device with little displacement after mounting. And a color display device.

[0009]

According to the present invention, there is provided a degaussing coil mounted on an outer peripheral surface of a cathode ray tube, and a cabinet front frame to which a front surface of the cathode ray tube is mounted. On the inner peripheral surface of the cathode ray tube extending in the tube axis direction, and protruding in the vertical direction toward the outer peripheral portion of the cathode ray tube, a plurality of recesses formed at a predetermined position facing the outer peripheral portion of the cathode ray tube. The degaussing coil mounting device is characterized in that a fixing rib is provided, and the degaussing coil is fitted into a recess of the fixing rib.

According to the above construction, the degaussing coil can be positioned by fitting it into the recess of the fixing rib, and the mounting position of the degaussing coil can be accurately determined.

According to a fifth aspect of the present invention, a cathode ray tube having an explosion-proof band on an outer peripheral surface thereof, a degaussing coil attached to a cone portion of the cathode ray tube, and a front surface portion of the cathode ray tube are attached to an inner peripheral portion. Extending in the axial direction of the cathode ray tube on the surface,
Further, the first recess is formed so as to vertically project toward the outer peripheral portion of the cathode ray tube, the first recess is formed at a position facing the explosion-proof band of the cathode ray tube, and the second recess is formed at a position where the degaussing coil is attached. And a cabinet front frame provided with a plurality of fixing ribs, wherein the explosion-proof band is housed in the first recess and the degaussing coil is fitted in the second recess. It is a color display device.

According to the above construction, the mounting position of the cathode ray tube and the mounting position of the degaussing coil can be determined by the recesses of the fixing ribs, and a color display device having a high degaussing effect can be provided.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a color display device and a degaussing coil mounting device of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view showing the entire structure of the color display device of the present invention, and FIG. 2 is an enlarged side view showing the mounting structure of the degaussing coil.

FIG. 1 shows a color television receiver, in which reference numeral 11 is a cathode ray tube, and a degaussing coil 21 is attached to the outer periphery thereof. The degaussing coil 21 is composed of, for example, two coil portions 22 and 23 attached to the upper portion and the lower portion of the cathode ray tube 11, respectively.
Reference numerals 2 and 23 are formed by winding a lead wire, which is a conductor, a plurality of times to form an annular shape, and an insulating tape is wound around the entire circumference. The shape of the degaussing coil is not limited to the illustrated example, and may be another shape.

The degaussing coil 21 is temporarily fixed to the outer peripheral portion of the cathode ray tube 11 and then fixed to the front frame 31 of the cabinet. For the temporary fixing, there is a method of fixing to the explosion-proof band 12 provided on the outer periphery near the front surface of the cathode ray tube 11 by using a linear material or the like. A lug 13 is provided at the corner of the cathode ray tube 11.

On the other hand, the front frame 31 of the cabinet is made of synthetic resin and has an opening 32 through which the front glass portion of the cathode ray tube can be seen. The inside of the corner of the opening 32 has the lug 13 of the cathode ray tube 11. Is provided with a boss 33 for fixing the lug 1 of the cathode ray tube 11 to the boss 33.
3 is fixed with a screw 14. Also,
A plurality of columnar bosses 34 project from the inner surface of the front frame 31, and a back cover (not shown) of the cabinet is attached to the bosses 34 with screws.

Further, the front frame 31 is provided with a guide rib 35 for mounting the speaker 41 and a guide rib 36 for mounting the printed board 42, and a fixing rib 37 for fixing and holding the degaussing coil 21. , 38
A plurality of (hereinafter referred to as fixed ribs) are provided.

The cathode ray tube 11 is inserted into the rear surface of the front frame 31 with the degaussing coil 21 temporarily fixed to the outer periphery thereof, and the degaussing coil 21 is inserted between the fixing ribs 37 and 38 and the cathode ray tube 11. The lug 13 is attached so as to fit therein, and after fixing the position of the degaussing coil 21, the lug 13 is fixed to the boss 33 of the front frame 31 using the screw 41.

FIG. 2 is an enlarged view of the structure of the rib 37 for fixing the degaussing coil 21, in which the inner peripheral surface of the front frame 31 of the cabinet extends in the tube axis direction of the cathode ray tube and A fixing rib 37 is formed so as to vertically project toward the outer peripheral portion of the cathode ray tube. This rib 37 is
Recess 37 for positioning and fixing the degaussing coil 21
1 and a second portion 37B having a recess 372 for accommodating and holding the explosion-proof band 12 of the cathode ray tube 11.

The cathode ray tube 11 is inserted in the front frame 31 so as to be lifted from below, the degaussing coil 21 is fitted in the recess 371, and the explosion-proof band 12 is mounted in the recess 372. The fixed rib 38 provided on the lower portion of the front frame 31 has the same structure as the rib 37.

The degaussing coil 21 includes a rib 37 and a cathode ray tube 1.
1 is inserted from the gap L1 between the degaussing coil 1 and the concave portion 371, and the diameter L2 of the degaussing coil 21 is set to L1 <L2 with respect to the width L1 of the gap. After fitting in, it can be positioned without slipping out. Even if L1 <L2,
Since the outer circumference of the degaussing coil 21 is wrapped with an insulating tape, it is possible to pass the degaussing coil 21 through the gap L1 by having some elasticity and slightly bending the front frame 31. Further, in order to facilitate the insertion of the degaussing coil 21 into the gap L1, the tip of the first portion 37A of the rib has a slope 373.

The fixing rib 38 provided on the lower portion of the front frame 31 can be omitted. That is, since the substrate 42 is attached to the bottom surface portion of the front frame 31, the fixing rib 38 can be removed when a member for positioning the degaussing coil 21 is attached to the substrate 42.

As described above, according to the present invention, the degaussing coil 21 can be fixed to the rib 37 (or 38) provided on the front frame 31 and can be accurately positioned by being fitted into the recess 371. This allows the recess 37 to be formed.
By determining the position of 1, the degaussing coil can be attached to the position where the degaussing effect is highest. Also, the recess 37
Since the explosion-proof band 12 of the cathode ray tube 11 is housed in 2,
The mounting position of the cathode ray tube 11 can also be reliably determined.

[0024]

According to the present invention, the degaussing coil 21 can be fixed by utilizing the rib 37 provided on the front frame 31, and the degaussing coil 21 can be positioned and fixed by the concave portion 371. The degaussing coil can be installed at a high position. Moreover, many components are not required for positioning, and the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a color display device according to an embodiment of the present invention.

FIG. 2 is a side view showing the configuration of the main part of the degaussing coil mounting device of the present invention.

[Explanation of symbols]

11 ... Cathode ray tube 12 ... Explosion-proof band 21 ... Degaussing coil 31 ... Cabinet front frame 37 ... Fixed rib 371 ... Depression coil fitting recess 372 ... Recess for storing explosion-proof band 373 ... Slope

Claims (6)

[Claims] 1. A degaussing coil attached to an outer peripheral surface of a cathode ray tube, and a cabinet front frame to which a front portion of the cathode ray tube is attached, wherein an inner peripheral surface of the front frame extends in a tube axial direction of the cathode ray tube. Extended,
Further, a plurality of fixing ribs are provided which are vertically projected toward the outer peripheral portion of the cathode ray tube, and have a concave portion formed at a predetermined position facing the outer peripheral portion of the cathode ray tube, and the degaussing portion is provided in the concave portion of the fixing rib. A degaussing coil mounting device, characterized in that a coil is fitted. 2. When the gap between the fixing rib and the outer peripheral portion of the cathode ray tube is L1 and the outer diameter of the degaussing coil is L2, L1 <L2, and the degaussing coil is inserted into the gap. The degaussing coil mounting device according to claim 1, wherein the degaussing coil mounting device is fitted in the recess. 3. An inclined surface is formed in the introduction portion of the fixing rib in order to make the gap of the introduction portion of the gap between the fixing rib and the outer peripheral portion of the cathode ray tube larger than the outer diameter L2 of the degaussing coil. The degaussing coil mounting device according to claim 1, which is characterized in that. 4. The fixing rib is projectingly provided at least on an inner surface of a top portion of the front frame.
Degaussing coil mounting device described. 5. A cathode ray tube having an explosion-proof band on an outer peripheral surface, a degaussing coil attached to a cone portion of the cathode ray tube, a front surface portion of the cathode ray tube is attached, and a tube shaft of the cathode ray tube on an inner peripheral surface. Of the cathode ray tube, the first recess is formed at a position facing the explosion-proof band of the cathode ray tube, and the second recess is formed at a position where the degaussing coil is attached. A cabinet front frame provided with a plurality of fixing ribs each having a recess formed therein, wherein the explosion-proof band is housed in the first recess and the degaussing coil is fitted in the second recess. A color display device characterized by the above. 6. When the gap between the fixing rib and the outer peripheral portion of the cathode ray tube is L1 and the outer diameter of the degaussing coil is L2, L1 <L2, and the gap between the fixing rib and the outer peripheral portion of the cathode ray tube. Of the degaussing coil is L2.
6. The color display device according to claim 5, wherein an inclined surface is formed at the introduction portion of the fixing rib in order to make the size larger.