JP3505832B2 - Degauss coil mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a degauss coil used in a cathode ray tube (CRT) of a television receiver, and more specifically, to an adhesion device to a cathode ray tube by a mounting device utilizing the rigidity of the degauss coil. And a squealing (resonance) noise of the degauss coil, and a work for attaching the degauss coil to the cathode ray tube with improved workability.

[0002]

2. Description of the Related Art In recent years, the performance of electronic equipment has been improved due to the development of electronic technology and the growing needs of users. For example, in television receivers, the screen size and the image quality are increasing. In the cathode ray tube used in these television receivers, a member for controlling the scanning position with respect to the fluorescent screen of the electron beam, which is called a shadow mask or an aperture grill made of an iron-based material in the cathode ray tube, is magnetized by the geomagnetism. In order to prevent the convergence from deviating, it is general to mount a decouse coil for the purpose of demagnetizing this member. The present invention relates to a mounting device for this degauss coil, and its configuration will be described below.

The mounting state of the prior art degauss coil in a television receiver will be described with reference to FIG. FIG. 3A is a perspective view showing an example of a conventional degauss coil mounting device, and FIG. 3B is an enlarged view of a mounting portion of a cathode ray tube.

In FIG. 3, a television receiver of the related art to which a degauss coil is attached is a beznet (a cover of a panel portion of a cathode ray tube) which is a front cabinet.
Alternatively, it is generally composed of a bezel cabinet 1 in which the bez net and the side cover are integrated, a cathode ray tube 2 and a degauss coil 3. On the inner surface (back surface portion) of the bezel cabinet 1, there is provided a holding member 5 for locking the boss 4 and the degauss coil 3 having screw holes for mounting the cathode ray tube 2 in the installed state of the cathode ray tube 2. It is formed integrally with the bezel cabinet 1 at a plurality of locations in the longitudinal direction.

The cathode ray tube 2 is composed of a panel portion which is an image display portion, a funnel portion, a neck portion into which an electron gun is inserted, and the like, and inside the panel portion,
An electron beam passage hole (not shown) made of an iron-based material and including a shadow mask and an aperture grill (not shown) is arranged. Further, a reinforcing metal fitting 6 for preventing implosion of the valve is usually wound around the outer peripheral portion of the panel portion of the cathode ray tube 2,
The cathode ray tube 2 is attached to the four corners of the reinforcing metal fitting 6 as described above.
Ear pieces 7 for attaching to the cabinet 1 are integrally provided. The ear piece 7 is provided with a screwing hole, and the cathode ray tube 2 has a screw 8 which penetrates the screwing hole of the ear piece 7 and is screwed into a screw hole provided in the boss 4. Is attached to the bezel cabinet 1.

The detailed structure of the degauss coil 3 is formed by winding a lead wire, which is a conductor, several times to form an inverted trapezoidal shape having an upper side 10 and a lower side 9 for the upper part of the cathode ray tube 2. Further, for the lower part of the cathode ray tube 2, the lower side 9 is formed into a substantially trapezoidal shape with the lower side 9 as a common side and is formed (shaped). Furthermore,
An electrically insulating tape called an UL tape made of an insulating material such as vinyl chloride (PCV) is wound around the entire circumference so as to have a circular cross-sectional shape.

When the degauss coil 3 is attached to the cathode ray tube 2, the degauss coil 3 is brought from above and applied to the panel upper part of the cathode ray tube 2 shown in FIG.
Furthermore, avoiding the neck portion, the cathode ray tube 2 is attached so as to be applied to the lower portion of the panel. At that time, while the degauss coil 3 is pressed against the funnel portion of the cathode ray tube 2, a part of the upper and lower two parallel long sides of the degauss coil 3 is inserted and fixed between the holding members 5 of the bezel cabinet 1. Further, although not shown in the drawing, a lead wire provided with a connector is led out to the degauss coil 3, and a predetermined degaussing current (from the external electric circuit via the lead wire when the power of the television receiver is turned on ( Damping oscillating current)
By adding a higher magnetic flux density, the electron beam passage hole made of the iron-based material described above is demagnetized.

[0008]

However, in the conventional degauss coil mounting device described above,
The annular length, shape (thickness), etc. of the manufactured many degauss coils each have variations (variations), and there is a problem that looseness easily occurs in the attached state. Further, it is preferable that the degauss coil is stably attached to the cathode ray tube as closely as possible, but the attachment device of the prior art degauss coil is poorly attached because of the above-mentioned reason, and it should be attached in a state of being lifted from the cathode ray tube. Therefore, when the degauss coil rattles or when a degaussing current is applied to the degauss coil, there is a problem that the coil squeal occurs due to resonance with the cathode ray tube or the like.

Further, as a measure for suppressing the coil squeal that occurs when the degauss coil resonates with a cathode ray tube or the like, the degauss coil will be described with reference to FIG. As a countermeasure, a tape C to be pressed down is attached, or a cushion D that absorbs vibration when a degauss coil is applied with a degaussing current is attached to the cathode ray tube. However, in this case, it takes a lot of time to mount the tape or cushion, and the tape or cushion corrodes and falls off over the years, which causes a problem of impairing the coil squeal suppressing effect. Furthermore,
According to FIG. 3 (b), the degauss coil comes into contact with the screw 8 for mounting the cathode ray tube, and the coating of the degauss coil is broken, which causes a malfunction of the television receiver.

The present invention has been made in consideration of the above points, and improves the adhesion of the degauss coil to the cathode ray tube by absorbing the variation of the degauss coil, etc., and makes the coil squeal regardless of the tape or the cushion. It is an object of the present invention to provide a prevention device for a decounce coil.

[0011]

In order to solve the above-mentioned problems, in the degauss coil mounting device of the present invention,
Ear pieces are provided at four corners of the reinforcing metal fitting wound around the outer periphery of the panel portion, and the cathode wires are attached to the cabinet by fixing the ear pieces to the cathode ray tube attachment portion provided in the cabinet with attaching screws. A device for attaching a degauss coil to a tube, wherein a holder seat is formed at a position at a predetermined interval on the upper side part and the lower side part of the reinforcing metal fitting, and on the inner surface of the cabinet, a position around the cathode ray tube. And a part of the cathode ray tube mounting portion and a first rib that supports the degauss coil formed at a position corresponding to a predetermined position between holder seats formed at a predetermined interval on the reinforcing metal fitting. Second ribs constituting the ribs and supporting the degauss coil formed at predetermined positions around the cathode ray tube are integrally formed with the cabinet, and The above-mentioned problem is provided by including a holder that is mounted on a holder seat, presses the degauss coil against the first rib and the second rib, and uses the restoring force of the degauss coil to lock the degauss coil. Solved.

Further, the height of the second rib is made equal to or more than the mounting screw for mounting the cathode ray tube on the cabinet, thereby solving the above problem.

[0013]

In the attachment device of the degauss coil of the present invention, the degauss coil shaped into a predetermined shape is once attached on the cathode ray tube and then pressed by the holder with the first rib and the second rib as fulcrums, I attached it by using the restoring force of the Degauss coil. Therefore, the installation work of the degauss coil can be easily performed, and the degauss coil can be closely attached to the cathode ray tube and stably installed, and the coil squeaking that occurs when a degaussing current is applied to the degauss coil is prevented. You can

In particular, since the height of the second rib is equal to or more than the mounting screw for mounting the cathode ray tube on the cabinet, the degauss coil strongly contacts the screw for mounting the cathode ray tube on the cabinet, and The coating does not break and cause a failure of the television receiver.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a degauss coil mounting device of the present invention will be described below with reference to FIGS. Figure 1
FIG. 2 is a perspective view showing a degauss coil attaching device of the present invention, FIG. 2A is a top view showing a degauss coil attaching device of the present invention, and FIG. Yes, (c) is an enlarged cross-sectional view taken along the line Loro, and (d) is an enlarged cross-sectional view taken along the line Har. It should be noted that parts common to those described in the related art are designated by the same reference numerals, and description thereof will be omitted.

First, an outline of a degauss coil mounting device of the present invention will be described with reference to FIG. In FIG.
Reference numeral 11 indicates a degauss coil attachment device of the present invention. Degauss coil attachment device 11 of the present invention
Is generally composed of a bezel cabinet (including a benet) as a front cabinet, a cathode ray tube 2 and a degauss coil 3. The detailed structure of the bezel cabinet 1 includes a boss 4 having a screw hole for mounting the cathode ray tube 2 on an inner surface thereof and a first boss 4 for newly supporting the degauss coil which is a characteristic part of the present invention. Rib 1
2, 12 'are formed at predetermined locations on the upper and lower portions of the bezel cabinet 1. Also, the second rib 1
3, 13 'are separated from the boss 4 and integrally with each other, or are close to the boss 4 and are separate bodies.
Is formed integrally with the.

The construction of the cathode ray tube 2 is such that a reinforcing metal fitting 6 is wound around the outer peripheral portion of the panel portion of the cathode ray tube 2, and the cathode ray tube 2 is provided at each of four corners of the reinforcing metal fitting 6 with the above-mentioned bezel cabinet 1. The ear piece 7 for attaching to the head and the holder seat 14 which is a characteristic part of the present invention are integrally provided with the lock hole 15. The cathode ray tube 2 is attached to the bezel cabinet 1 by passing a screw 8 through a screwing hole of the ear piece 7 and screwing the screw 8 to the boss 4.

The degauss coil 3 is formed by winding a lead wire several times to form a substantially trapezoidal upper part having an upper side 10 and a lower side 9, and an upper side 10 having the lower side 9 as a common side. A conventionally known one is used which is formed for the lower part and is wound with an electric insulating tape.
Then, when the power of the television receiver is turned on, a high magnetic flux density is applied with a predetermined degaussing current from an electric circuit (not shown),
The electron beam passage hole is demagnetized. Further, the degauss coil attaching device 11 of the present invention is provided separately from the above-described components, and is provided with a holder 17 having a lock claw 16 for inserting the degauss coil 3 into the holder seat 14. Has been done. The above-mentioned constituent elements are the above-mentioned bezel cabinet 1 and cathode ray tube 2.
Although it is similarly formed in the lower part of the above, its description is omitted because it is formed symmetrically with the upper part.

Next, the mounting operation of the degauss coil mounting device of the present invention will be described with reference to FIGS. 1 and 2A to 2D. Note that FIG. 2 is configured with the same elements as in FIG. 1, and the description of the configuration is omitted. In FIG. 1, as described above, the two degauss coils 3 that have been formed into a substantially trapezoidal shape in advance are brought from above, and the cathode ray tube 2 is covered so as to avoid the neck portion of the cathode ray tube 2. Then, the degauss coil 3 is fitted to the outer periphery of the panel portion of the cathode ray tube 2 and fixed at two positions above and below the cathode ray tube 2.

2A, at this time, the shape of the portion of the degauss coil 3 sandwiched between the second rib 13 and the second rib 13 'is substantially straight. Then, the degauss coil 3 is sandwiched by the holder 17 and fitted into the holder seat 14, and the holder 17 is attached to the cathode ray tube 2
It is inserted by pressing in the direction of arrow A, which is the front of the. In this way, when the degauss coil 3 is attached to the cathode ray tube 2, the degauss coil 3 is temporarily fixed by fitting it to the outer periphery of the panel portion of the cathode ray tube 2 and then the holder 17 presses the degauss coil 3. Since it is a two-step method of inserting and attaching, the workability of inserting and attaching the attachment device of the degauss coil is improved.

Further, referring to FIG. 2A, the degauss coil 3 attached in this manner has a second rib 13 integrally formed with the bezel cabinet 1 and a first rib 12.
Then, the first rib 12 'and the second rib 13' are forcibly deformed into a substantially M shape. The degauss coil 3
The spring generates a restoring force (rigidity) due to the spring back by receiving such a deforming force, so that the state of always receiving the restoring force B in the arrow direction is maintained. By holding the degauss coil 3 in this manner, it is possible to suppress vibration that occurs when a degaussing current is applied to the degauss coil 3 and prevent coil squeal.

Further, in FIG. 2B, the first rib 12 'integrally formed on the bezel cabinet 1 has a shape which allows the cathode ray tube 2 to be easily inserted, and the degauss coil 3
Is sandwiched between the first rib 12 'and the reinforcing metal 6 wound around the cathode ray tube 2, and the degauss coil 3 is pressed against the first rib 12' under the restoring force B. Will be. In FIG. 2C, the degauss coil 3 is sandwiched between the tip of the holder 17 and the reinforcing metal 6 wound around the cathode ray tube 2, and receives the restoring force B to be maintained. The holder seat 14 and the holder 17 are in such a relationship that the fitting portion 18 of the holder 17 is fitted into the holder seat 14 and the lock claw 16 is locked and locked in the lock hole 15 as shown in FIG.

Further, in FIG. 2 (d), since it is a corner portion of the cathode ray tube 2, the degauss coil 3 receives a downward force and a restoring force B to be pressed against the second rib 13 '. Is maintained. At the same time, the second rib 1
The cathode ray tube 2 shown in FIG. 2 (a) located in the vicinity of 3'is not strongly contacted with the screw 8 for attaching to the bezel cabinet. Therefore, the degauss coil 3 does not come into strong contact with the screw 8 to break the coating of the degauss coil 3 and cause a failure of the television receiver. In the above-described embodiment, the apparatus for mounting the degauss coil is illustrated in the upper part of the cathode ray tube, but the same effect can be obtained in the lower part of the cathode ray tube.

The present invention is not limited to the above embodiment, and various embodiments can be adopted. For example, although a cathode ray tube that is generally used is illustrated in this embodiment, a wide-type or high-vision type cathode-ray tube is also included therein. Further, the two substantially trapezoidal shapes have been illustrated as the shape of the degauss coil, but the shape can be applied to the loop shape and other shapes, and the shape of the degauss coil is not limited at all. Needless to say, it can be applied to other embodiments.

[0025]

As described above, according to the degauss coil attaching device of the first to third aspects, the degauss coil is pressed and inserted by the holder and the first rib and the second rib. The state in which the degauss coil receives a restoring force is always maintained, and the slack in the attached state due to the annular length, shape (thickness), and the like of many degauss coils can be absorbed. Therefore, the adhesion of the degauss coil to the cathode ray tube increases, and the rattling of the degauss coil,
Vibration generated when a degaussing current is applied can be absorbed and coil squeal can be prevented.

Further, as a measure for suppressing the coil squeal of the degauss coil, no tape or cushion is required, and the number of steps for attaching the tape or cushion can be reduced. The prevention effect is not impaired.

Further, since the height of the second rib is equal to or more than the mounting screw for mounting the cathode ray tube on the cabinet, the degauss coil does not come into contact with the screw. Therefore, it is possible to prevent a failure of the television receiver due to a short circuit or the like and realize a highly reliable television receiver.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting device for a degauss coil according to the present invention.

2A is a top view showing a mounting device for a degauss coil according to the present invention, FIG. 2B is an enlarged sectional view taken along the line EE, and FIG. 2C is an enlarged sectional view taken along the line ROLL. And
(D) is an enlarged cross-sectional view taken along the line Har.

FIG. 3A is a perspective view showing an example of a conventional degauss coil mounting device, and FIG. 3B is an enlarged view of a mounting portion of a cathode ray tube.

[Explanation of symbols]

1 Basil cabinet 2 cathode ray tube 3 Degauss coil 4 Boss 5 holding member 6 reinforcing metal fittings 7 ear pieces 8 screws 9 bottom 10 Upper side 11 Degauss coil attachment device of the present invention 12, 12 'First rib 13, 13 'Second rib 14 Holder seat 15 Lock hole 16 lock claws 17 holder 18 Fitting part

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Claims (3)

(57) [Claims] 1. A reinforcing metal fitting 4 wound around the outer periphery of a panel portion.
Ear pieces are provided in the corners, and the ear pieces are not installed on the cabinet.
Fixed to the attached cathode ray tube with a mounting screw.
A device for attaching a degauss coil to a cathode ray tube attached to the cabinet , wherein a predetermined interval is provided on the upper side and the lower side of the reinforcing metal fitting.
A holder seat is formed at a predetermined position, and an inner surface of the cabinet has a position around the cathode ray tube.
And is formed on the reinforcing metal member at a predetermined interval.
A first rib supporting the degauss coil at a position corresponding to a predetermined position between the holder seats and the cathode ray.
A rib forming a part of the tube mounting portion of the cathode ray tube
Supports the degauss coil formed at a predetermined position around the
That together with the second and the ribs are formed integrally with the cabinet, is mounted on the holder seat, presses the degaussing coil to said first rib and said second rib, said Degau
Lock the degauss coil by utilizing the restoring force of the coil
Mounting device degaussing coil, characterized in that it comprises a holder for. 2. A lock hole is formed in the holder seat,
The holder is formed with locking pawls, which are
The device according to claim 1, characterized in that
Mounting device for the above-mentioned degauss coil. 3. The second rib connects the cathode ray tube to the cathode.
Same as the height of the mounting screw to be attached to the pole tube mounting part.
The device according to claim 1, wherein the height is equal to or higher than the above.
Mounting device for the above-mentioned degauss coil.