JPH062192Y2 - Convergence device holder structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a convergence method in which an electron beam emitted from an electron gun of an in-line type color cathode ray tube having a plurality of electron guns is concentrated at one point on the screen portion of the color cathode ray tube. Regarding the device.

[Conventional technology]

Conventionally, the static convergence device used for this kind of in-line type color cathode-ray tube has a holder that holds two movable thin magnets, each of which is capable of finely adjusting the synthetic magnetic force, at equal intervals, with a tightening band at the neck of the cathode-ray tube.
It is designed to be tightened and fixed with a load of ~ 25 kg.

Also, in a color television receiver using this convergence device, the shooting signal is differentiated, a compensation signal is created, the signal is further added to the auxiliary deflection coil, and the scanning speed of the electron beam is controlled to rise, A technique for displaying a sharp falling image to improve the image quality is used. And the auxiliary deflection coil is 0.2-0.4
Two coils formed to a thickness of mm are provided in a heat-resistant holder with a groove of 0.2 to 0.4 mm for positioning and incorporation. Further, a metal band and a screw are attached to a flexible portion for fixing to the neck portion of the cathode ray tube at the end of the holder.

A conventional perspective view of this holder is shown in FIG.

Reference numeral 11 is a groove having a depth of about 0.2 to 0.4 mm and a width of about 2 mm for positioning and incorporating the auxiliary deflection coil. Thirteen
The botches a and 13b are a lower protrusion and an upper protrusion for fixing the metal tightening band. When tightened with a band, the inner diameter of the flexible portion of the holder becomes thin, and the holder 1 is fixed to a glass tube (not shown) of a color cathode ray tube.

[Problems to be solved by the device]

Since the holder 1 is provided with a groove having a depth of approximately 0.2 to 0.4 mm in order to position and incorporate the two auxiliary deflection coils in this manner, the wall thickness of that portion of the holder 1 is outside. It is approximately 0.2-0.4mm thinner than the part.

The neck of the cathode ray tube is made of glass, and it is fastened with screws (screws) to secure it with a metal band. In that case, if only the part of the fixing groove of the auxiliary deflection coil is thin, only that part will fall down first, and uneven load will be applied to the glass at the neck part, and in some cases cracks may occur in the glass. become.

That is, in that case, the wall thickness of the holder 1 is 1 to 1.5 mm, but only the groove for fixing the coil of the auxiliary deflection 11 is 0.2 to 0.4 mm thinner, so that the band When tightened, the thin part first collapses, and the lagging flexible part with no groove falls gently and tightens. Therefore, the load is unevenly applied to the glass tube, and the load on the glass tube is locally increased as shown in FIG.

According to the present invention, when the holder is fastened with a band and attached to the neck portion of the glass cathode ray tube, the inner peripheral surface of the holder is almost evenly collapsed and an even load is applied to the glass, causing a problem such as cracking. To provide a holder structure for a convergence device that does not occur,
To that end.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a concave groove all around the holder flexible portion so that the groove has a strength substantially equal to that of the groove for fixing the auxiliary deflection coil, and is tightened with a metal band. Moreover, the entire circumference of the holder is tightened almost uniformly.

[Action]

The bobbin structure of the convergence device configured as described above is added to each of the tongue pieces that form the tip of the flexible portion bobbin made of the heat-resistant resin of the holder Since the groove is opened, when tightening the holder to the neck of the color cathode-ray tube with a metal band, the tightening load by the tongue with the auxiliary deflection coil fixing groove and the bobbin without the auxiliary deflection coil fixing groove An unbalanced distribution of the tightening loads due to the tongues is avoided, and uniform tightening is achieved.

〔Example〕

 A perspective view of an embodiment of the present invention is shown in FIG.

The holder structure of this convergence device is shown in FIG. 3a as a side view and in FIG. 3b as a front view, and an exploded plan view of a part of the auxiliary deflection coil is shown in FIG.

The auxiliary deflection coil 3 forms two loops and is wound around the outer circumference of the neck portion of the color CRT.

In this case, the long sides 3a and 3b of the auxiliary deflection coil 3 are inserted into the bottom surface of the auxiliary deflection coil fixing groove 11 of the bobbin 10 integrally molded of heat-resistant resin without breaking the shape of FIG.
It is fixed by adhesion with a flexible resin.

The auxiliary deflection coil fixing groove 11 is engraved in such a manner that a step is formed at the root portion of a tongue-shaped strip divided into a number near the tip of the bobbin 10.

Therefore, in the present invention, as shown in FIG. 1, an additional groove 12 which does not exist in the conventional example is formed in the joint portion 15 in which the bobbin 10 and the device fixing means 6 are integrally formed.

The shape of the additional groove is closer to the tip than the auxiliary deflection coil fixing groove 11 and its groove width is narrower, as indicated by the dotted line in the development view of FIG. This is because the band 2 is not loaded with the auxiliary deflection coil 3 but the bobbin 1 when tightening the band 2 with the screw 7.
This is because the tongue piece of 0 is bent evenly, and is appropriately selected according to the mechanical strength of the tongue piece.

Further, 13a and 13b are lower protrusions and upper protrusions of a bocchi-like shape provided on the tongue of the bobbin 10 for determining the tightening position of the band 2, and 16a and 16b are the bending between the tongues of the bobbin 10. The thin-walled portions 51, 52, 53, which have a considerable strength while keeping the inner circumferential surface of the bobbin 10, are fitted to the outer circumferential surface of the bobbin 10 so as to be slidable along the circumference of the bobbin 10. The magnet piece for the purity, the magnet piece for the four poles, the magnet piece for the six poles, and the magnet piece for the six poles, which are made of a ring-shaped non-magnetic heat-resistant resin plate and have opposite polarities to the adjacent magnetic poles facing the inner peripheral surface, It is a lead-out terminal for introducing an exciting current to the auxiliary deflection coil 3 in which two loops are connected at a connection point 31.

The holder 1 thus formed is loaded into the neck portion of the color cathode ray tube, and then the fastening screw is twisted and tightened to be fixedly attached.

The tightening stress of the load generated at that time is the tightening stress generating portion 14
It is distributed like the shaded part of the developed view of FIG.

As is clear from the comparison with the conventional example (Fig. 6), the tightening stress generating part is widely expanded under the same tightening load, so the stress applied to the neck part of the color CRT per unit area is increased. The size of the bobbin 10 is reduced, and the tongue of the bobbin 10 is not damaged, and the color CRT is not cracked.

That is, in the case of the present invention, the auxiliary deflection coil fixing groove 11 is provided over the entire circumference of the flexible portion like the additional groove 12 in FIG.
It has a groove with a depth of 0.2-0.4 mm, which is almost the same as the above, and when the flexible portion bobbin 10 of the holder is tightened with the same metal band 2, it is at the same time as the fixing groove 11 of the auxiliary deflection coil. The entire circumference of the flexible portion is simultaneously tightened under the same conditions to tighten the neck portion of the glass tube, and as a result, the weight is uniformly applied to the glass tube as shown in FIG.

In addition, as another embodiment of the present invention, means for using all the additional grooves 12 as the auxiliary deflection coil fixing grooves 11 can be considered.

[Effect of device]

Thus, according to the present invention, when the bobbin is mounted on the neck portion of the color cathode ray tube, the flexible tongue of the bobbin flexes evenly, the tightening load is shared in a wide area, and the bobbin tongue is locally overloaded. The load is not applied to break or damage the tongue of the bobbin or to crack the neck of the color cathode ray tube, which significantly improves the reliability of the bobbin mechanism of the convergence device and extends its service life. It is possible to exert an effect.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of the present invention, and FIG.
The figure shows a load state distribution diagram on the back surface of the bobbin (contact surface with the cathode-ray tube), FIG. 3 is a side view of the holder, a front view, and FIG. 4 is a partial development view of the auxiliary deflection coil, FIG. 5, FIG. FIG. 6 is an explanatory diagram of a conventional example. 1 ... Holder, 2 ... Band, 3 ... Auxiliary deflection coil, 6 ...
Device fixing means, 7 ... Tightening screw, 10 ... Bobbin, 11 ...
Auxiliary deflection coil fixing groove, 12 ... Additional groove, 13a, 13
b ... protrusion (botch) part, 14 ... tightening stress generating part, 15 ...
Joined portions, 16a, 16b ... Thin portion.

Claims (1)

[Scope of utility model registration request] 1. A convergence device for concentrating an electron beam emitted from an electron gun of an in-line type color cathode ray tube having a plurality of electron guns at one point on a screen portion of the color cathode ray tube, in which the electron beam is provided on an outer peripheral portion of a neck portion of the color cathode ray tube. A bobbin made of heat-resistant resin with which the peripheral part abuts, two auxiliary deflection coils wound in a flat shape so as to circulate around the neck part via the bobbin, and the inner peripheral surface of the bobbin fits on the outer peripheral surface. However, a plurality of ring-shaped non-magnetic heat-resistant resin plates that are slidable along the circumference of the ring-shaped non-magnetic heat-resistant resin plate are evenly spaced on the inner peripheral surface of the ring-shaped non-magnetic heat-resistant resin plate A plurality of permanent magnets facing each other and fixed so that the adjacent magnetic poles have mutually different polarities, and an auxiliary deflection coil for fixing the auxiliary deflection coil to a part of the outer peripheral surface of the bobbin. Holder Structure convergence device, characterized in that substantially provided additional grooves of the same shape as the circumferential direction in the auxiliary deflection coil fixing groove of the remaining portions to form a Le fixing grooves in the circumferential direction.