JPS58100342A - Deflecting device - Google Patents

Abstract

PURPOSE:To enhance greatly the deflecting efficiency of the captioned device, by forcing a pair of main cores to be magnetically combined by means of an auxiliary core and by making a vertical deflecting coil to be wound around the auxiliary coil in a troidal form with regard to the deflecting device used for a television receiver and the view finder of a video camera. CONSTITUTION:Even if the width in the tube-axial direction of auxiliary cores 6 and 7, namely, vertical defecting coils 8 and 9 is small, a magnetic field space of necessary intensity can be obtained in the tube-axial direction. Consequently, the resistance R can be minimized by shortening the entire length of the winding of coils 8 and 9, so the deflection exponent RI<2> becomes small, and the vertical deflection efficiency can be improved remarkably. On the other hand, with regard to the horizontal deflection, the ineffective magnetic flux can be minimized by bringing main cores 1 and 2 into close contact with a horizontal deflecting coil 5, so the deflection exponent LI<2> becomes small and the efficiency becomes better.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deflection device used in a view finder of a television receiver or a video camera.

The winding structure for horizontal deflection coils and vertical deflection coils is as follows:
There are saddle type and toroidal type. Due to its structure, saddle-shaped coils have the advantage that the spread of magnetic flux distribution on the tube axis is small, and therefore there is little invalid magnetic flux.However, on the other hand, in order to increase the magnetic field space, the coil must be made longer in the tube axis direction. This will increase the electrical resistance of the coil. On the other hand, with a toroidal coil, the magnetic flux distribution spreads widely along the tube axis due to its structure, so the required magnetic field space can be obtained without making the coil long in the tube axis direction, and the coil's electrical resistance Although this has the advantage of being able to reduce the , the leakage flux to the outer periphery of the coil is large, so the effective inductance becomes large.

By the way, the deflection index indicating the deflection efficiency is the inductance of the deflection coil, and the resistance is R1, the current value 'rI for obtaining a predetermined deflection width.In the horizontal deflection coil, LI
and RI2 for the vertical deflection coil. That is, in a horizontal deflection coil, the smaller the inductance L, the smaller the deflection index, and the better the efficiency. In the vertical deflection coil, the smaller the resistance R, the smaller the deflection index.
Improves efficiency. Therefore, from the point of view of deflection efficiency, the horizontal deflection coil has a saddle shape with less effective magnetic flux.
A toroidal type vertical deflection coil is advantageous because it can reduce resistance. .

For this reason, the horizontal deflection coil is usually wound in a saddle shape, and the vertical deflection coil is wound in a toroidal shape.

The present invention further significantly improves the deflection efficiency in a deflection device in which the horizontal deflection coil is wound in a saddle shape and the vertical deflection coil is wound in a toroidal shape. , FIGS. 1 to 3 are examples of the deflection device of the present invention. In the present invention, a pair of main cores 1 and 2 having a shape along the tube surface and having a sufficient width in the axial direction of the tube are arranged to face each other in the horizontal direction with gaps 3 and 1 formed in the upper and lower positions. be done. A horizontal deflection coil 5 is wound inside the main cores 1 and 2 in a saddle shape.

Furthermore, a pair of arm-shaped auxiliary cores 6 and 7 are disposed above and below the outer sides of the pair of main cores l and 7, respectively, and both ends of the auxiliary cores 6 and 7 sandwich the pair of main cores l and 2, respectively. As shown in FIG.
magnetically coupled by. And this auxiliary core 6
and 7 are wound with vertical deflection coils, wg and wa in a toroidal shape.

According to this structure, a horizontal deflection magnetic field is formed in the tube by the horizontal deflection coil 5, while magnetic flux generated in the auxiliary cores 6 and 7 by the vertical deflection coils g and wa is transmitted from the ends of the auxiliary cores B and 7 to the main core. As shown in the figure, a vertical deflection magnetic field V is formed inside the tube by forming air gaps 3 and 2 above and below, as shown in the figure. Since the main cores l and 2 separate the main cores l and 2, if main cores l and 2 have high electrical resistance, the horizontal deflection coil and the vertical deflection coil g and cod can be completely insulated.

Conventionally, a vertical deflection coil is wound around a core having a certain width in the tube axis direction for forming a magnetic field.

In contrast, in the present invention, the auxiliary cores 6 and 7 around which the vertical deflection coils 9 are wound are mainly used to generate magnetic force, and the magnetic field is formed by the main cores 1 and 2. Therefore, according to the present invention, even if the width of the auxiliary cores 6 and 7, that is, the vertical deflection coils g and 9, in the tube axis direction is small as shown in FIGS. 1 and 2, the required width in the tube axis direction can be maintained. It is possible to obtain a large magnetic field space. Therefore, the coil width 9
Since the total length of the winding can be shortened and its resistance R can be reduced, the deflection index RI2 is reduced and the efficiency of vertical deflection is significantly improved. On the other hand, regarding the horizontal deflection as well, by bringing the main cores 1 and 2 into close contact with the horizontal deflection coil 5, the ineffective magnetic flux can be reduced, so that the deflection index LI2 is small and efficiency is improved. For the structure shown in Figures 1 to 3 for a 4-inch tube with a neck diameter of 20Tr1rrI and a deflection angle of 50°, the thickness of the winding of the vertical deflection coil and the winding 9 were made the same as before, and the total length was When measured at about 30% of the conventional value, it was found that the deflection index RI in the vertical range was about tI0%, and the deflection index LI of the horizontal deflection was about 7 inches, both lower than the conventional one.

Note that if the upper and lower air gaps 3 and V are large, the efficiency of horizontal deflection will decrease, and if the vertical deflection coils g and t are wound unevenly, the distribution of the vertical deflection magnetic field will become asymmetric. It is desirable that the upper and lower air gaps 3 and V be appropriately small. In practice, an annular core with an inner diameter somewhat smaller than the outer diameter of the horizontal deflection coil S is divided into two, and a pair of main cores L
If you put them together, the gap 3
It is possible to reduce the size of bits and I, and also to reduce manufacturing costs.

In addition, in order to accurately form the voids 3 and 3 in the upper and lower positions, for example, as shown in FIG. Neck side separator or back cover t5 and /A
On the contrary, the main cores 1 and 2 may be assembled by forming convex portions or four portions and engaging the two portions.In this way, the assembly process of the device can also be shortened.

The auxiliary cores 6 and 2 may be attached to the main core and 2 by adhesive or the like, but the auxiliary cores 6 and 7 may be made of a resilient magnetic material such as a silicon steel plate.
and 2 may be attached so as to press down from both sides. Furthermore, as shown in FIG. 2, a recess may be formed at the center of the main cores 1 and 2 in the vertical direction, and the tips of the auxiliary core 6 and the auxiliary core may be hooked into this recess.

Note that if a magnetic material such as a silicon steel plate with high magnetic permeability and high saturation magnetic flux density is used as the auxiliary cores 6 and 7, the efficiency of vertical deflection can be further improved.

The auxiliary core around which the vertical deflection coil is wound is for generating magnetic force, and if the air gaps 3 and 3 are small, the influence of this magnetomotive force section will not directly reach the inside of the main cores 1 and 2.
Two auxiliary cores are not necessarily required; as shown in FIG. S, only one auxiliary core B may be wound with a vertical deflection coil g. In addition, for the structure shown in Fig. S for a pipe with a neck diameter of 20 rrrm and a deflection angle of 500 inches, the thickness of the winding of the vertical one-station coil g is the same as the conventional one, and the total length is about 3 s% of the conventional one. As a result of measurements, it was found that the deflection index RI2 of vertical deflection was about 5 g%, and the deflection index LI2 of horizontal deflection was about 7%, both lower than in the past.

Further, as shown in FIGS. 6 and 7, the vertical deflection coils 10 and/or surround the ends of the two auxiliary cores 6 and 7 at both ends of the auxiliary cores 6 and 70, respectively. It may be wrapped. Furthermore, as shown in Figure 3, 1
It is sufficient that the vertical deflection coil 10 is simply wound around one end of the auxiliary core B. However, depending on the size of the air gap 3 formed by the pair of main cores L and 2, the vertical deflection magnetic field becomes the bottle cushion magnetic field. Therefore, if it is necessary to change the magnetic field distribution in the tube axis direction, such as for a color ten vision receiver, the size of the gaps 3 and l should be changed in the tube axis direction, or the As shown in FIGS. 9 and 70, other magnetic bodies 13 and /G (
It is also possible to achieve the purpose by inserting i.

According to the present invention, in particular, the efficiency of vertical deflection can be greatly improved compared to the conventional method, and it is possible to use ICs for vertical deflection circuits and extend the lifespan of portable video cameras. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of an example of the deflection device of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a sectional view taken along line 11-11 in FIGS. 1 and 2, and FIGS. 3 is a cross-sectional view of another example of the deflection device of the present invention, FIG. 6 is a side view of still another example of the deflection device of the present invention, and FIG. 7 is a cross-sectional view taken along the line ■-■. 3 is a sectional view similar to FIG. 7 of still another example of the deflection device of the present invention, and FIG. 9 is a plan view showing the main core and void of still another example of the deflection device of the present invention. Figure 70 shows that
- It is a sectional view on the X-ray. In the figure, l and 2 are main cores, 3 and da are air gaps, S is a horizontal deflection coil, 6 and 7 are auxiliary cores, and g~// are vertical deflection coils. Figure 1, Figure 2, Figure 3, Figure 4 ~, Figure 5, Figure 8, 41-Pi1!

Claims (1)

[Claims] A pair of main cores having a sufficient width in the tube axis direction and having a shape along the tube surface are arranged facing each other in the horizontal direction with a gap formed in the upper and lower positions, and a horizontal deflection coil is placed inside the main cores. Wrapped around a mold, an arm-shaped auxiliary core is arranged outside the pair of main cores, and both ends of the auxiliary core are connected to the vertical center position of the pair of main cores so as to sandwich the pair of main cores. The pair of main cores are magnetically coupled by the auxiliary core, and a vertical deflection coil is wound around the auxiliary core in a toroidal shape.