JPS60175345A - Deflection yoke - Google Patents

Abstract

PURPOSE:To increase a coil surface area for improving the radiating efficiency by arranging the conductive part of the frontal end or the rear end of a horizontal deflection coil arranged in a saddle shape on a core while being bent in the center direction of the deflection yoke outside the core. CONSTITUTION:A horizontal deflection coil 2 arranged in a saddle shape and a vertical deflection coil 3 wound around the core 4 form a deflection yoke 1 for a cathode-ray tube. Further, the end conductive part 2a of either of the frontal and rear ends or those of both ends of the horizontal deflection coil 2 are so constituted as to be bent in the center direction of the deflection yoke 1 outside the core 4 while further adding a radiating plate to the vicinity of the bent parts of the end conductive parts 2a as occasion demands. Accordingly, the surface area of the horizontal deflection coil 2 increases so as to play a role of radiation thus to reduce a temperature rise while being used extremely efficiently for a cathode-ray tube or the like for the high precision display having especially high horizontal deflection frequency and a large deflection current.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a deflection yoke that is used by being attached to a cathode ray tube for high-definition Tispray, which has a particularly high horizontal deflection frequency and a large deflection current. ] In general, high-definition displays have a horizontal deflection frequency of 50-1.
With high-speed deflection of okHz, the horizontal deflection current is driven with a large current of about 10 to 15 A, depending on the impedance of the deflection coil and the withstand voltage of the drive transistor. For this reason, the horizontal deflection coil, which is formed for 1 second on the deflection yoke, has an increased resistance value due to the skin effect and an increase in copper loss, resulting in an increase in heat generation in the deflection yoke, which has become a major problem.

FIG. 1 is a perspective view of a conventional deflection yoke, and FIG. 2 is a perspective view of essential parts to clearly show the positional relationship between a horizontal deflection coil and a core.

In these figures, 1 is a deflection yoke, 2 is a horizontal deflection coil, 3 vertical deflection coils, 4i1 is a core, 5 is a separator, and 6 is a Cree J7 ((shown).

Conventionally, regarding the heat generation of such a deflection yoke.

A method of forcibly cooling air by installing a fan inside the sensor is used, but it requires a special circuit and the mounting position is limited so as not to adversely affect the deflection magnetic field. There were drawbacks to British soil.

[Object of the Invention] An object of the present invention is to provide a deflection yoke that has a function of reducing temperature rise by itself without using other means such as the above-mentioned 71n.

[Summary of the invention]

The deflection yoke of the present invention effectively dissipates the heat generated by the deflection coil.
One or both end conductor portions are bent toward the center of the deflection yoke on the outside of the core.

Mayu, the deflection coil is immersed in an insulating material with good thermal conductivity.
A heat dissipation plate 2 is provided on the end conductor portion of the deflection coil to further enhance the heat dissipation effect.

[Embodiments of the invention]

Hereinafter, an embodiment of the present invention shown in a tray diagram will be described. Third
4 is a perspective view showing an embodiment of the present invention, and FIG. 4 is a perspective view showing a main part of the positional relationship between the horizontal deflection coil 2 and the core 4 in FIG. 3. As shown in these figures, in the present invention, either or both of the front end and the rear end of the horizontal deflection coil are bent toward the center of the deflection yoke on the outside of the end conductor portion 2ai core 4. It has an outstanding configuration. (The figure shows the case where the present invention is applied to the front end of the horizontal deflection coil υ.) Next, the effect of this is explained. , the surface area of the horizontal deflection coil 2 increases and it plays a role as a heat sink? As a result, the temperature rise of the horizontal deflection coil 2 as a whole is effectively reduced. Further, since the end conductor portion 2a of the horizontal deflection coil 2 is bent to the outside of the core 4, this end conductor portion 2a is bent toward the outside of the core 4.
Since the magnetic field generated at a is shunted by the core 4,
The king deflection generated inside the deflection yoke is large in the world.

It will not have any significant impact.

Now, the system shown in FIGS. 5 and 6 will be described as the most effective first embodiment. In this case, the horizontal deflection coil 2 located inside the deflection yoke is made of an insulating material with good thermal conductivity (
For example, it is impregnated with epoxy resin, resin, silicone, etc.), and a heat dissipation plate 7 is disposed near the bent portion of the horizontal deflection coil end conductor portion 2a. With such a configuration, the heat generated by the horizontal deflection coil 2 is transmitted to the insulating material 8 with good thermal conductivity, and the heat radiation plate fL'fc is installed so as to be in contact with the heat radiated from the heat conductive material 8. 7 into the air. And the heat sink 7
As shown in FIGS. 5 and 6, an 8-ton insulating material with good thermal conductivity is provided near the bent portion of the end conductor portion 2a of the horizontal deflection coil 2 provided outside the core. Therefore, sufficient insulation between the horizontal deflection coil 2 and the heat sink 7 is ensured, and even if the heat sink is made of a metal magnetic material, it is installed outside the core 4, so it must be formed inside the deflection yoke. There is no adverse effect on the deflection magnetic field.

As shown in FIGS. 7 and 8, this means uses the horizontal deflection coil 2 of the normal deflection yoke 1 as shown in FIGS. 7 and 8.
Even when the shape of the end conductor is formed in the direction of the road surface angle with respect to the center axis of the deflection yoke 1, heat is radiated through the insulating material 8 with good thermal conductivity behind the end conductor 2a. It is also effective to have seven trays.

Next, as another embodiment of the deflection yoke 1 of the present invention, the ninth
FIG. 10 shows a deflection yoke 1 using a core 4 having grooves 9r formed on the inner surface of the core as shown in the figure.

The effect of the wooden deflection yoke 1 is as shown in Fig. 7.
, Q, J have the same effect as deflection yoke 1, but in particular,
As shown in FIG. 11, when the core 4 has a structure in which a notch 10 is provided at both ends or one end, two horizontal deflection coils are passed through the notch 10 of the core 4, and the end Similarly to the method 7j shown in FIG. By simply providing the heat dissipation plate 7, the temperature rise reduction effect i can be obtained.

〔Effect of the invention〕

Since the deflection yoke according to the present invention is configured as described above, the heat generation of the deflection yoke, which increases by 1% in high-definition displays, can be reduced by the deflection yoke alone, without using other means. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional deflection yoke, FIG. 2 is a perspective view showing the mounting relationship between the horizontal deflection coil and the core, and FIG. 3 is a perspective view of a conventional deflection yoke according to an embodiment of the present invention. FIG. 4 is a perspective view showing the main parts of the attachment relationship between the horizontal deflection coil and the core, and FIG. 5 is a view of the deflection yoke according to another embodiment 1 of the present invention. The perspective view, Figure 6, is
7 is a perspective view of a deflection yoke as yet another embodiment of the present invention, FIG. 8 is a side view of this device, and FIG. 9 is a diagram showing a structure in which grooves are provided on the inner surface of the core. FIG. 10 is a perspective view of a deflection yoke as another embodiment of the present invention using the core of FIG. 9. FIG. 11 is a perspective view of a core with a notch r provided at the end of the core. It is a diagram. Explanation of symbols 1... Deflection yoke % 2, 2a... Horizontal deflection coil, 3... Vertical deflection coil, 4... Core, 5... Separator, 6... Cliff, 7... Heat sink, 8...
- Insulating material, 9... groove, 1o... notch. Figure 1 Figure 2 Figure 3 Figure 4 Figure 51 71 Work 58 Figure 9 Figure 10

Claims (1)

[Claims] 1) In a deflection yoke in which the deflection coils are arranged in a square shape in the core, the southern conductor portion of either or both of the front end and the rear end of the deflection coil is bent toward the center of the deflection yoke on the outside of the core. Deflection yoke with t% characteristics.