JPH1083776A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change a cathode-ray tube in the tube axis direction, and cope with different kinds of machines by positioning cores of a coil bobbin on a collar through a height changeable core support member formed as a separate body. SOLUTION: Cores 3a and 3b of a coil bobbin 10 are positioned on a collar 10a through a core support member 12 formed as a separate body. That is, the core support member 12 has a trapezoidal recessed part 12a, and is arranged so as to be inserted into a projection 10c correspondingly arranged in the recessed part 12a on the vertical and horizontal axis of a deflection yoke of a rear end side surface of the collar 10a. A projection 12b extending in parallel to an upper end surface is formed on the core support member 12, and this projection 12b comes into contact with front side end surfaces of the cores 3a and 3b. Here, the coil bobbin 10 is formed so that the position of the cores 3a and 3b can be changed in the tube axis direction of a cathode-ray tube by installing the core support member 12 different in height (h) according to its necessity. Therefore, it can cope even with different kinds of machines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and is particularly applicable to a case where a magnet wire is wound around a core to form a vertical deflection coil. The present invention forms a core support member for positioning the core separately from the coil bobbin holding the core, so that the position of the vertical deflection coil can be changed by using a core support member having a different height as necessary. And the coil bobbin can be diverted to different models.

[0002]

2. Description of the Related Art Conventionally, there is a deflection yoke in which a magnet wire is wound around a core to form a vertical deflection coil. In such a deflection yoke,
The core is positioned by a core supporting portion formed on the coil bobbin, and the vertical deflection coil is held at a predetermined position with respect to the horizontal deflection coil.

FIG. 7 is a side view showing a deflection yoke of this type. The description of the deflection yoke shown in FIG. 7 will be omitted with the description of the vertical deflection coil omitted.

In a deflection yoke 1 of this type, a horizontal deflection coil is wound in a saddle shape by winding using a mold, and a pair of horizontal deflection coils wound in this manner are coil bobbins 2 having a substantially funnel shape. It is arranged so that it may oppose inside. Instead of this, a magnet wire is wound directly on the coil bobbin 2 to form a saddle-shaped horizontal deflection coil. In the deflection yoke 1, in a separate winding step, a magnet wire is wound around each of cores 3a and 3b obtained by dividing a substantially conical cylindrical shape, and a vertical deflection coil is wound.

Further, the deflection yoke 1 has a core 3a on which a vertical deflection coil is wound outside the coil bobbin 2.
And 3b are arranged, and then the front cover 4, the back cover 5
Are arranged and formed.

As shown in FIG. 8, the coil bobbin 2 on which the cores 3a and 3b are arranged is injection-molded into a substantially funnel shape by injection molding a resin as shown in FIG. Collars 2a and 2b are formed at the rear end of the electron gun, respectively. Furthermore, in this front end side collar 2a,
A projection protruding toward the rear end is formed. Thus, the deflection yoke 1 forms the core supporting portions 2c by the projections, and abuts the front end surfaces of the cores 3a and 3b on the core supporting portions 2c to position the cores 3a and 3b in the tube axis direction of the cathode ray tube. . Further, in this state, the cores 3a and 3b are adhered to the coil bobbin 2 by the adhesive 6 (FIG. 7), whereby the vertical deflection coil is held at a predetermined position with respect to the horizontal deflection coil.

[0007]

By the way, this kind of coil bobbin 2 is formed in a shape following the outer shape of the funnel of the cathode ray tube, so that when the cathode ray tube has the same deflection angle, the applied cathode ray tube is different. Are formed in substantially the same shape. Therefore, in such a case, it would be convenient if the coil bobbin could be shared by each deflection yoke.

However, even when the cathode ray tube has the same funnel outer shape, the required characteristics are different, so that the optimum position of the vertical deflection coil with respect to the horizontal deflection coil is different for each model. For this reason, the conventional deflection yoke has a problem that it is difficult to use the coil bobbin for different models.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a deflection yoke that can use a coil bobbin for different models.

[0010]

According to the present invention, a coil bobbin and a core supporting member are formed separately from each other.

If the coil bobbin and the core supporting member are formed separately, the position of the core can be changed by using core supporting members having different heights as required, so that the coil bobbin can be used for other models. it can.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(1) First Embodiment FIG. 1 is a side view of a coil bobbin shown in comparison with FIG. 7, and is applied to a deflection yoke according to a first embodiment of the present invention. This coil bobbin 10 is formed into a substantially funnel shape by injection molding, similarly to the coil bobbin 2 described above with reference to FIG. Further, the coil bobbin 10 has collars 10a and 1a at the front end on the display screen side and the rear end on the electron gun side, respectively.
0b is formed.

Further, the coil bobbin 10 is provided on the vertical axis and the horizontal axis of the deflection yoke so that the front end surfaces of the cores 3a and 3b can be directly abutted, avoiding the magnet wires of the vertical deflection coils wound on the cores 3a and 3b. A core support member 12 formed separately from the coil bobbin 10 is arranged on the front end side flange 2a on the shaft, and the cores 3a and 3b are positioned by the core support member 12.

Here, as shown in an enlarged manner by an arrow A,
The core support member 12 is disposed by being inserted into a protrusion 10c formed on the coil bobbin 10. That is, the coil bobbin 10 is provided on the rear end side surface of the collar 10a at positions corresponding to the vertical axis and the horizontal axis of the deflection yoke, respectively.
0c is formed. These projections 10c are formed in a trapezoidal cross section so as to extend in the vertical axis and horizontal axis of the deflection yoke, respectively, and so that the rear end side of the coil bobbin 10 is on the bottom side.

On the other hand, the core supporting member 12 is formed by, for example, injection molding using the same resin as the coil bobbin 10. The core supporting member 12 has a recess 12 having a trapezoidal cross section corresponding to the projection 10c on the lower surface side in this drawing.
Thus, as shown by an arrow B, the concave portion 12a can be arranged on the collar 10a of the coil bobbin 10 by engaging and pressing the concave portion 12a with the projection 10c. Further, the core supporting member 12 has a projection 12b extending in parallel on an upper end surface thereof.
2b is in contact with the front end surfaces of the cores 3a and 3b.

As a result, as shown in FIG. 2, the coil bobbin 10 is provided with core support members 12 having different heights h as necessary, and the positions of the cores 3a and 3b are variously changed in the tube axis direction of the cathode ray tube. The position of the vertical deflection coil with respect to the horizontal deflection coil is variously selected so that it can be adapted to different models.

Thus, after the cores 3a and 3b are bonded to the coil bobbin with the adhesive in a state where the cores 3a and 3b are positioned by the core support member 12, the deflection yoke 1 performs the same process as the conventional deflection yoke. Formed through

In the above configuration, in the deflection yoke (FIG. 1), the core support member 12 having a height h corresponding to the position of the vertical deflection coil with respect to the horizontal deflection coil selected by design is selected. The concave portion 12a of the core support member 12 is engaged with and pressed by the protrusions 10c formed on the horizontal axis and the vertical axis of the coil bobbin 10.
As a result, the deflection yoke 1 is fixed to the flange 1 of the coil bobbin
The core support member 12 having a height h required for Oa is disposed.

In this state, in the deflection yoke, a vertical deflection coil is wound around each of the cores 3a and 3b in a vertical winding step, and a horizontal deflection coil is wound inside the coil bobbin 10 in a horizontal winding step. You. Subsequently, the cores 3 a and 3 b on which a vertical deflection coil is wound from the outside of the coil bobbin 10 are arranged such that the end surface on the display screen side comes into contact with the projection 12 b of the core support member 12. As a result, the deflection yoke moves the cores 3a and 3b at positions corresponding to the height h of the core support member 12 with respect to the coil bobbin 10.
Can be positioned. Therefore, the coil bobbin 10
In, even when a coil bobbin is diverted to another model, the position of the vertical deflection coil with respect to the horizontal deflection coil can be set variously by selecting the core support members 12 having different heights h as needed.

Thus, after the front yoke is attached to the deflection yoke, the cores 3a and 3b are positioned in the tube axis direction of the cathode ray tube in this way. 3b is a coil bobbin 10
It is formed by being fixedly adhered to.

According to the above configuration, by forming the core support member separately from the coil bobbin, the core support members 12 having different heights h are selected as necessary, and the position of the vertical deflection coil with respect to the horizontal deflection coil is selected. Can be set variously. Therefore, the coil bobbin 10 can be diverted to another model as needed, and the coil bobbin can be used effectively accordingly.

Further, since the position of the vertical deflection coil can be freely changed by selecting the core support member 12 as required, the work of designing and studying can be simplified, and the degree of freedom in designing can be improved. be able to.

(2) Second Embodiment FIG. 3 is a side view of a coil bobbin shown in comparison with FIG. The deflection yoke according to this embodiment employs the core support member 22 shown in FIG. 3 instead of the core support member 12 described above with reference to FIG. The configuration of the deflection yoke according to this embodiment other than the core support member 22 is the same as that of the deflection yoke according to the above-described first embodiment.

Here, the core supporting member 22 has a concave portion 22a formed on the lower side similarly to the above-described core supporting member 12, and the concave portion 22a is engaged with the projection 10c of the coil bobbin 10 and pressed to thereby form the deflection yoke. It is arranged on a horizontal axis and a vertical axis.

Similarly to the above-described core support member 12, the core support member 22 has a convex portion 22b formed in parallel with the upper end surface, and the front end surfaces of the cores 3a and 3b abut on the convex portion 22b. 3a and 3b can be positioned.

Further, the core supporting member 22 is
b, an elastic piece 22c protruding along the side surface of the coil bobbin 10 is formed integrally on the inner peripheral side, and the cores 3a and 3c are formed.
When b is pressed against the collar 10a, the elastic piece 22c is bent toward the inner peripheral side of the coil bobbin 10 and presses the inner side surfaces of the cores 3a and 3b toward the outer peripheral side as shown by an arrow C.

As a result, as shown in FIG. 4, in this deflection yoke, the cores 3a and 3b are pressed by the elastic pieces 22c of the core support members 22 arranged in the horizontal axis direction and the vertical axis direction. Center axis is coil bobbin 10
So that it is not displaced with respect to. Thus, in this deflection yoke, the cores 3a and 3b are connected to the collar 10a.
The cores 3a and 3b are adhered and fixed to the coil bobbin 10 while being pressed to the a side.

According to the structure shown in FIG. 3, the elastic piece is formed on the separately formed core supporting member and the inner side surface of the core is pressed, so that in addition to the effect of the first embodiment, The center axis of the core can be positioned.

(3) Third Embodiment FIG. 5 is a side view of a coil bobbin shown in comparison with FIG. The deflection yoke according to this embodiment employs the core support member 32 shown in FIG. 5 instead of the core support member 12 described above with reference to FIG. In the deflection yoke according to this embodiment, the configuration other than the core support member 32 is the same as that of the deflection yoke according to the above-described first embodiment.

Here, the core support member 32 has a concave portion 32a formed on the lower side similarly to the above-described core support member 12, and the concave portion 32a is engaged with the projection 10c of the coil bobbin 10 to be pressed, whereby the deflection yoke is formed. It is arranged on a horizontal axis and a vertical axis.

Similarly to the core support member 12 described above, the core support member 32 has a convex portion 32b formed in parallel with the upper end surface, and the front end surfaces of the cores 3a and 3b abut on the convex portion 32b. 3a and 3b can be positioned.

Further, the core supporting member 32 is
A plate-like projection 32c protruding from the outer periphery of the coil bobbin is formed below b, so that when the vertical deflection coil is wired, a lead wire of the vertical deflection coil can be hooked on the projection and drawn around. .

Thus, as shown in FIG. 6, in this deflection yoke, the projections 32c are arranged on the core support members 32 arranged in the horizontal axis direction and the vertical axis direction, and the wiring work can be simplified by the projections 32c. It has been made like that.

In the above-described embodiment, a case has been described where the concave portion 12a having a trapezoidal cross section of the core supporting member 12 is arranged so as to be engaged with the projection 10c of the coil bobbin. The present invention is not limited to this. For example, when the core supporting member is arranged on the coil bobbin with an adhesive, various arrangement methods can be widely applied as necessary.

Further, in the above-described embodiment, a case has been described in which the vertical deflection coil is formed by winding the cores 3a and 3b obtained by dividing the substantially conical cylindrical shape, but the shape of the core is not limited to this. Instead, the present invention can be applied to a case where a vertical deflection coil is formed by winding a coil around an integral core.

Further, in the above-described embodiment, FIG.
As described above, the case where the core supporting members are arranged in the horizontal axis direction and the vertical axis direction has been described, but the present invention is not limited to this, and can be widely applied to the case where the core supporting members are arranged in other positions.

[0038]

As described above, according to the present invention, by separating the coil bobbin and the core supporting member from each other, the position of the core can be adjusted in the tube axis direction of the cathode ray tube using the core supporting members having different heights. It can be changed, so that the coil bobbin can be used for another model.

[Brief description of the drawings]

FIG. 1 is a side view showing a coil bobbin of a deflection yoke according to a first embodiment of the present invention.

FIG. 2 is a side view showing the coil bobbin of FIG. 1;

FIG. 3 is a side view showing a coil bobbin of a deflection yoke according to a second embodiment.

FIG. 4 is a sectional view showing the deflection yoke of FIG. 3;

FIG. 5 is a side view showing a coil bobbin of a deflection yoke according to a third embodiment.

FIG. 6 is a sectional view showing the deflection yoke of FIG. 5;

FIG. 7 is a side view showing a conventional deflection yoke.

FIG. 8 is a side view showing the coil bobbin of FIG. 7;

[Explanation of symbols]

1 ... deflection yoke, 2, 10 ... coil bobbin, 2a,
2b, 10a, 10b ... collar, 10c, 32c ... protrusion, 12, 22, 32 ... core support member, 12a ... recess, 12b ... protrusion, 22c ... elastic piece

Claims (3)

[Claims] 1. A deflection yoke formed by winding a vertical deflection coil around a core, wherein a coil bobbin and a core support member are formed separately, the coil bobbin holds the core, and the core support member is A deflection yoke, wherein the core is positioned in a tube axis direction of a cathode ray tube. 2. The deflection yoke according to claim 1, wherein the core supporting member has an elastic piece for pressing an inner side surface of the core. 3. The deflection yoke according to claim 1, wherein the core support member has a protrusion protruding on an outer peripheral side of the coil bobbin.