JP2001285887A - Degaussing coil holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a degaussing coil holder that can realize mount of a degaussing coil onto a cathode ray tube(CRT) with excellent workability at a low cost. SOLUTION: A degaussing coil holder 52 consists of a screw fastening section 52a with a screw hole 52al and of a retainer section 52b. The screw fastening section 52a is provided with a couple of claws 52a2 that clamps a fixing metallic fixture of the CRT. A couple of the claws 52a2 tentatively fixes the degaussing coil holder 52 to the fixing metallic fixture and the CRT with the degaussing coil holder 52 is screw-fastened to a cabinet. The degaussing coils are arranged at a circumferential part of the CRT and retained by folding the retainer section 52b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cathode ray tube (CR)
The present invention relates to a degaussing coil holder for holding a degaussing coil in T).

[0002]

2. Description of the Related Art In an image display apparatus using a CRT, a degaussing coil is attached to the CRT to prevent the shadow mask of the CRT from being magnetized by an external magnetic field such as terrestrial magnetism. Is demagnetized.

FIG. 6 is a view showing a conventional degaussing coil holding structure, and FIG. 7 is a perspective view showing a degaussing coil holding tool used in the conventional degaussing coil holding structure. In FIG. 6, CR
At four corners of T1, a fixing bracket 2 for fixing the CRT 1 to a cabinet (not shown) is integrally provided. A screw hole 2a is formed in the fixing bracket 2, and the CRT 1 is fixed by passing the screw 3 through the screw hole 2a and screwing the screw 3 to the cabinet. The CRT 1 is fixed to a cabinet after a degaussing coil 4 described later is mounted on the CRT 1.

[0004] A degaussing coil 4 is arranged around the CRT 1. For example, screw holes 2a
A pair of small holes 2b are formed so as to sandwich. The degaussing coil holder 5 is passed through the small hole 2b, and the degaussing coil holder 5 is wound around the degaussing coil 4 and twisted to hold the degaussing coil 4 on the CRT 1. As shown in FIG. 7, the degaussing coil holder 5 has a wire 5a covered with a vinyl cover 5b, and has a width of, for example, about 3 mm.

[0005]

In the conventional degaussing coil holding structure described above, when the CRT 1 is screwed to the cabinet with the screw 3, the washer 3a attached to the screw 3 tends to damage the coating of the degaussing coil 4. There was a problem. The inside of the degaussing coil 4 is a primary side circuit,
Since the fixing metal 2 is the ground of the secondary circuit, if the degaussing coil 4 contacts the fixing metal 2, the dielectric strength will be poor.

Therefore, the demagnetizing coil holder 5 is loosened in advance, and the demagnetizing coil 4 is manually separated from the washer 3a by hand so that the demagnetizing coil 4 does not contact the washer 3a.
After that, a complicated operation of fixing the degaussing coil 4 by re-twisting the degaussing coil holder 5 was necessary. As described above, the conventional degaussing coil holder has a problem that workability when attaching the degaussing coil 4 to the CRT 1 is poor.

As another conventional example, there is one disclosed in Japanese Patent Application Laid-Open No. 9-9177.
There was a problem that the structure was complicated, the cost was increased, and the workability was not good. Therefore, the degaussing coil 4 is connected to the CRT 1
There has been a demand for a demagnetizing coil holder that has good workability at the time of attachment to the device and can be realized at low cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a degaussing coil holder which has good workability when attaching a degaussing coil to a cathode ray tube and can be realized at low cost. And

[0009]

According to the present invention, a first screw hole (2a) for screwing a cathode ray tube (1) to a cabinet is formed in order to solve the above-mentioned problems of the prior art. Degaussing coil holder (52) for holding a degaussing coil (4) in a cathode ray tube having a fixing bracket (2)
, A screwing portion (52a) having a second screw hole (52a1) and being fixed to the fixing bracket by a screw (3) for screwing the cathode ray tube to the cabinet by the fixing bracket. And a holding portion (52b) connected to the screwing portion and holding a degaussing coil disposed near the fixing bracket, wherein the screwing portion fixes the screwing portion by the screw. A temporary fixing means (52a2) for temporarily fixing the degaussing coil holder to the fixing bracket before fixing to the metal fitting, wherein the screwing portion and the pressing portion are in an initial state before pressing the degaussing coil. The holding portion is bent in the direction of the screwing portion to hold the degaussing coil when holding the degaussing coil. It is intended to provide a degaussing coil holder characterized by the following.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A degaussing coil holder according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a degaussing coil holder of the present invention, FIG. 2 is a perspective view showing a state where the degaussing coil holder of the present invention is temporarily fixed to a cathode ray tube, and FIG. 3 is a degaussing coil of the present invention. Diagram for explaining the operation when fixing the holder to the cathode ray tube with screws,
FIG. 4 is a perspective view showing a degaussing coil holder related to the degaussing coil holder of the present invention, and FIG. 5 is a perspective view for explaining an operation when the degaussing coil holder is held by using the degaussing coil holder shown in FIG. FIG. 1 to 5, the same parts as those in FIG. 6 are denoted by the same reference numerals.

Before describing the degaussing coil holder of the present invention, a degaussing coil holder related to the degaussing coil holder of the present invention will be described with reference to FIGS. FIG.
The demagnetizing coil holder 50 shown in FIG.
Proposed in 56912. As shown in FIG. 4, the degaussing coil holder 50 is made of a substantially L-shaped metal plate in an initial state. The degaussing coil holder 50 has a screw hole 50
a1 and a degaussing coil 4 to be described later.
And a holding portion 50b for holding the pressing force. Screw part 50
a and the holding portion 50b are integrated.

The holding portion 50b is covered with a heat-shrinkable tube (coating) 50b1 for preventing the demagnetizing coil 4 from being damaged. In this example, the screw hole 50
The inside diameter of a1 is 4.75 mm, and the plate thickness of the degaussing coil holder 50 (the screwed portion 50a) is 0.5 mm. These dimensions are determined by the dimensions of the screw 3 passing through the screw hole 50a1.

In order to hold the degaussing coil 4 using the degaussing coil holder 50, the following is performed. A cabinet (not shown) is face down, and the CRT 1 is placed in the cabinet from above. As shown in FIG. 5, the screw 3 is passed through the screw hole 50a1 of the degaussing coil holder 50, and the screw 3 and the degaussing coil holder 50 are held at the tip of the bit 6 of the magnetized air driver. Then, the screw 3 is transferred together with the degaussing coil holder 50 to the screw hole 2a of the fixing bracket 2 provided on the CRT 1.

Next, the screw 3 is tightened, and the CRT 1 is fixed to the cabinet by screwing it to the cabinet. In FIG. 5, the washer 3a is omitted. Screwing to the cabinet with the screws 3 of the CRT 1 is performed at four corners of the CRT 1 as in the conventional case. A degaussing coil holder 50 is attached to all four fixing brackets 2.
At the same time, when the screw 3 is screwed, the degaussing coil 4 is arranged around the CRT 1, the pressing portion 50 b of the degaussing coil holder 50 is bent, and the degaussing coil 4 is pressed and fixed. The degaussing coil 4 is fixed in the vicinity of the fixing fitting 2 where the degaussing effect is most effective.

According to the degaussing coil holder 50, the CR
When the T1 is screwed to the cabinet with the screw 3, the degaussing coil 4 is not mounted on the CRT 1, so that the washer 3a mounted on the screw 3 does not damage the coating of the degaussing coil 4. Moreover, since the degaussing coil 4 can be fixed only by bending the holding portion 50b, workability when attaching the degaussing coil 4 to the CRT 1 is extremely good. The pressing portion 50b has a predetermined length, and any portion thereof can be bent.
The demagnetizing coil 4 can be fixed even if the position changes slightly. Therefore, the degaussing coil holder 50 is highly versatile for various sizes and shapes of the CRT 1 and the degaussing coil 4. Further, since the degaussing coil holder 50 can be easily formed of a metal plate, it can be realized at extremely low cost.

By the way, as shown in FIG. 5, the degaussing coil holder 50 described above is
In order to attach to the fixing bracket 2 of the RT 1, it is necessary to hold down the holding portion 50 b of the degaussing coil holder 50 by hand in order to prevent the rotation of the degaussing coil holder 50.

Therefore, while maintaining the features of the degaussing coil holder 50 and improving the workability when mounting the CRT 1 to the fixing bracket 2, the degaussing of the present invention will be described with reference to FIGS. It is a coil holder. FIG. 1 shows that the degaussing coil holder can be temporarily fixed to the fixing bracket 2 when the degaussing coil holder is mounted on the fixing bracket 2 of the CRT 1.
Therefore, the demagnetizing coil holder according to the present invention does not need to be held down by hand without rotating or shifting the position of the demagnetizing coil holder. The degaussing coil holder of the present invention is referred to as a degaussing coil holder 52.

In FIG. 1, the degaussing coil holder 52 of the present invention is made of a substantially L-shaped metal plate in an initial state. The degaussing coil holder 52 includes a screwing portion 52a having a screw hole 52a1 and a holding portion 5 for holding the degaussing coil 4.
2b. In order to prevent the demagnetizing coil 4 from being damaged, the pressing portion 52b is covered with a heat-shrinkable tube (coating) 52b1 for preventing damage. A vinyl tube may be used instead of the heat-shrinkable tube for scratch prevention, and the coating is not limited to these.

The demagnetizing coil holder 52 differs from the demagnetizing coil holder 50 in a screwing portion 52a. The width of the screwing portion 52a of the degaussing coil holder 52 is wider than the width of the screwing portion 50a of the degaussing coil holder 50. The width of the screwing portion 52a of the degaussing coil holder 52 is substantially the same as the width of the fixing bracket 2, and both ends of the screwing portion 52a in the width direction are provided with the degaussing coil holder 52. Are formed with a pair of claws 52a2 for temporary fixing. The pair of claws 52a2 are provided with the degaussing coil holder 52.
Is a temporary fixing means for temporarily fixing to the fixing fitting 2.

The claw 52a2 is integrated with the screwing portion 52a. The claw 52a2 is formed by bending a rectangular tongue protruding from both ends in the width direction of the screwing portion 52a in a direction opposite to the pressing portion 52b, and further bending the bent middle portion inward in a V shape. Have been. The interval between the bent portions 52a3 is smaller than the width of the fixing bracket 2. Thereby, as described later, the screwing portion 52a is fixed to the fixing fitting 2 by a pair of claws 52a2.
, And the degaussing coil holder 52 can be temporarily fixed to the fixing bracket 2.

With the cabinet (not shown) turned down,
The CRT 1 is placed in the cabinet from above. When the screwing portion 52a of the degaussing coil holder 52 is pushed into the fixing bracket 2 from above the fixing bracket 2, a pair of claws 5
Since 2a2 has flexibility, an end in the width direction of the fixing bracket 2 abuts on the bent portion 52a3, and the pair of claws 52a2 spread outward. Then, when the bent portion 52a3 reaches the back surface side (the screen side of the CRT 1) of the fixing bracket 2, the bent portion 5a3
2a3 returns to the inside, and presses the back side of the fixing bracket 2. Thereby, as shown in FIG. 2, the pair of claws 52a2
Are screwed portions 52a abutting on the surface side of the fixing bracket 2
Cooperate with to clamp the fixing fitting 2. In this way,
The degaussing coil holder 52 is temporarily fixed to the fixing bracket 2. The pair of claws 52a2 are holding means for holding the fixing fitting 2. The holding means is a preferred example of the temporary fixing means, but the temporary fixing means is not limited to the holding means alone.

Then, as shown in FIG.
The screw 3 is passed through the screw hole 52a1 of 2a and the screw hole 2a of the fixture 2 through the washer 3a, the screw 3 is tightened by the bit 6 of the air driver, and the CRT 1 is fixed to the cabinet by screwing the CRT 1 to the cabinet. . In this state, the degaussing coil holder 52 is completely fixed to the fixing bracket 2. Next, a degaussing coil 4 is provided around the CRT 1.
(Not shown here) and the degaussing coil holder 52
Is bent, and the degaussing coil 4 is pressed down and fixed.

[0023]

As described above in detail, the degaussing coil holder of the present invention has a screw hole, and is fixed to the fixing bracket by the screw for fixing the cathode ray tube to the cabinet by the fixing bracket. And a holding part connected to the screwing part and holding the degaussing coil arranged near the fixing bracket, the screwing part being before the screwing part is fixed to the fixing bracket by a screw. And a temporary fixing means for temporarily fixing the degaussing coil holder to the fixing bracket, wherein the screwed portion and the holding portion are substantially L-shaped in an initial state before pressing the degaussing coil, and hold the degaussing coil. At the time, the holding part was bent in the direction of the screwing part so as to hold the degaussing coil,
Since it is not necessary to hold down the degaussing coil holder to the fixing bracket with screws by hand, workability when attaching the degaussing coil to the cathode ray tube is good, and it can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a degaussing coil holder of the present invention.

FIG. 2 is a perspective view showing a state in which the degaussing coil holder of the present invention is temporarily fixed to a cathode ray tube.

FIG. 3 is a diagram for explaining an operation when the degaussing coil holder of the present invention is fixed to a cathode ray tube with screws.

FIG. 4 is a perspective view showing a degaussing coil holder related to the degaussing coil holder of the present invention.

FIG. 5 is a perspective view for explaining an operation when the degaussing coil is held by using the degaussing coil holder shown in FIG. 4;

FIG. 6 is a diagram showing a conventional degaussing coil holding structure.

FIG. 7 is a perspective view showing a conventional degaussing coil holder.

[Explanation of symbols]

 Reference Signs List 1 cathode ray tube (CRT) 2 fixing bracket 2a screw hole 3 screw 3a washer 4 degaussing coil 6 bit 50,52 degaussing coil holder 50a, 52a screwing part 50a1,52a1 screw hole 52a2 claws (clamping means, temporary fixing means) 52a3 Bent part 50b, 52b Press part 50b1, 52b1 Heat-shrinkable tube (coating)

Claims (3)

[Claims] 1. A degaussing coil holder for holding a degaussing coil in a cathode ray tube having a fixing fitting formed with a first screw hole for screwing the cathode ray tube to a cabinet, wherein a second screw hole is provided. A screwing portion fixed to the fixing bracket by a screw for screwing the cathode ray tube to the cabinet with the fixing bracket; and near the fixing bracket connected to the screwing portion. And a fixing portion for holding the degaussing coil disposed on the fixing member. The screwing portion temporarily fixes the degaussing coil holding member to the fixing metal member before fixing the screw fixing portion to the fixing metal member by the screw. The screwing portion and the holding portion are substantially L-shaped in an initial state before pressing the degaussing coil. Degaussing coil holder, characterized by being configured so as to press said degaussing coil and the holding portion is bent to the screwing portion direction when pressing the Le. 2. The degaussing coil holder according to claim 1, wherein said temporary fixing means is a holding means for holding said fixing metal. 3. The cover according to claim 1, wherein the pressing portion is provided with a coating for preventing the degaussing coil from being damaged.
Or the degaussing coil holder according to 2.