JPH0338932Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-line color cathode ray tube convergence device, and more particularly to a ring-shaped coil bobbin used in the convergence device.

For example, Tokuko Sho 51-4815 or Tokuko Sho No.
As described in Publication No. 51-45936, in the case of in-line color cathode ray tubes, due to tolerances of each component during manufacturing, or because each electron beam is in the correct position with respect to the tube. Depending on the type of vertical and horizontal deflection fields used, different misconvergence results. For this reason, in the invention described in Japanese Patent Publication No. 51-4815, a pair of E-shaped cores are arranged opposite to each other in the color cathode ray tube neck, and each leg of both cores is wound with a required correction coil. A correction current for horizontal or vertical synchronization is applied to correct misconvergence.
However, when a pair of E-shaped cores are used in this manner, there is a drawback that the convergence device becomes large in size, and the manufacturing process is complicated and expensive due to the large number of parts.

In order to eliminate the above-mentioned drawbacks, the present applicant fixed a ring-shaped coil for dynamic convergence, in which 4-pole and 6-pole coils were wound toroidally around a ring-shaped core, to a terminal plate. proposed a compact and simple-structure convergence device for color cathode ray tubes, which is attached to a device holder equipped with a ring magnet for static convergence.

The purpose of the present invention is to provide a bobbin suitable for use in the ring-shaped coil of a convergence device having such a configuration, and in particular, to increase the sensitivity by reducing the inner diameter of the ring-shaped core. The present invention provides a convergence device for a color cathode ray tube that is equipped with a ring-shaped coil bobbin that enables the following.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a side view and a front view showing an example of a color cathode ray tube convergence device using a bobbin according to the present invention.
indicates a device holder, and the front part of this holder 1 is spread out in the shape of a morning glory, and a terminal plate attachment part 2 in the shape of a ring is fixed at the tip by a frame member 3 having a plurality of (eight in the figure) a plurality of frame members 3. has been done. Holder 1
The rear part of the unit has multiple units (6 in the figure) for fixing the convergence device to the neck of the color cathode ray tube.
It is formed into a tongue piece 4 extending in the tube axis direction. 5, 6 and 7 each indicate a pair of ring magnets rotatably mounted on the holder 1;
Each pair of ring magnets 5 to 7 is, for example, 2
It is magnetized into poles, 4 poles, and 6 poles, and is used for purity and static convergence. Reference numeral 8 indicates a ring magnet locking member, and with this locking member 8 loosened, each ring magnet 5 to
After rotating the magnet 7 and adjusting the tightness and static convergence, the locking member 8 is tightened to fix the ring magnets 5 to 7 at optimal positions. 9, 10 and 11 indicate spacers. Reference numeral 14 denotes a dynamic convergence coil, which is formed by arranging a ring-shaped core (not shown) on a ring-shaped bobbin 13 having 12 segments arranged at approximately equal intervals, and winding a required coil in a toroidal shape. A ring-shaped coil 14 is shown, and this ring-shaped coil 14 is arranged in the central opening of the terminal plate 15. Reference numeral 16 indicates a terminal pin attached to the terminal plate 15, and reference numeral 17 indicates a screw (the nut is not visible in the figure) for fixing the terminal plate 15 to the terminal plate attachment portion 2 of the holder 1.

In the present invention, the ring-shaped bobbin 13 includes:
A plurality of protrusions (in the illustrated example, there are 12 segments 12, so 12 protrusions) protruding from the inner diameter part in the axial direction are formed at approximately equal intervals,
These protrusions are the only portions of the bobbin that come into contact with the inner diameter surface of the ring-shaped core.

In one embodiment of the present invention, as shown in FIGS. 3 to 5, the segment 12 is formed into a substantially L-shaped rectangular rod-like body, and one leg portion 12a of the segment 12 is formed along the surface of the ring-shaped bobbin body 18. The legs 12b are arranged radially from the center at angular intervals of about 30° from each other, and the other leg portions 12b protrude from the inner diameter of the bobbin body 18 in the axial direction at angular intervals of about 30°. It forms a protrusion. Of course, this is merely an example, and the intended purpose of the present invention is achieved by simply forming a plurality of protrusions that protrude from the inner diameter portion of the ring-shaped bobbin body 18 at approximately equal intervals in the axial direction. achieved.

In the illustrated example, one leg 12a of each segment 12
A substantially L-shaped wiring processing portion/terminal board fixing portion 21 ₁ to 21 ₁₂ having a recess 19 for wiring processing and a protrusion 20 for fixing the terminal board is integrally formed at the tip of the terminal board. These wiring processing parts and terminal board fixing parts 21 ₁ ~
One of the wiring processing parts 21 ₁₂ , for example 21 ₁ , has a different shape from the other wiring processing parts/terminal board fixing parts 21 ₂ to 21 ₁₂ . That is, as clearly shown in FIG. 5A, the terminal board fixing protrusion 20 of this wiring processing part/terminal board fixing part _{21 1} is connected to the protrusion ₂₀ ( (see Fig. 5B), the width in the radial direction is wider than that of the bobbin 13.
It also serves as a positioning means when attaching the terminal board 15 to the terminal board 15. As shown in FIG. 6, the circular central opening 22 of the terminal board 15 has 12 holes at positions corresponding to the protrusions 20 of the terminal board fixing parts 21 ₁ to 21 ₁₂ .
recesses 23 ₁ to 23 ₁₂ are formed, of which the recess 23 ₁ corresponding to the wide protrusion 20 of the terminal board fixing portion 21 ₁ is formed deeper than the other recesses 23 ₂ to 23 ₁₂ . Of course, these recesses 23 ₁ to 23
₁₂ is formed in a size and shape that allows the protrusion 20 to fit therein. Therefore, the wide protrusion 20, which also serves to position the terminal board fixing part ₂₁₁ , fits only into the deep recess ₂₃₁ of the terminal board 15, so the position of the bobbin 13 with respect to the terminal board 15 can be easily determined. . Of course, this positioning may be performed using other engagement means. In addition, in the illustrated example, as is clear from FIG. 3, the one leg portion 12a of the segment 12 along the radial direction on the bobbin surface and the wiring processing portion/terminal board fixing portion 21 ₁ to 21 at the tip thereof.
₁₂ as a whole is formed in a slightly tapered shape with the width becoming slightly wider as it goes outward in the radial direction, but this is just an example and is not limited to this shape. In addition, a printed circuit is formed on the back side of the terminal board 15, so the terminal board 15 also has the function of a printed circuit board, and is therefore called a terminal board. It is equivalent to the one with 16 attached.

A ring-shaped core is arranged on the bobbin 13 configured in this way, and in this example, two sets of six-pole and four-pole coils are wound in a toroidal shape (specifically, the coils are wound in a toroidal manner at the beginning).
The ring-shaped coil 14 for dynamic convergence is wound by winding two sets of pole coils with the poles shifted by about 30 degrees from each other, and then two sets of the four-pole coils are wound with the poles shifted by about 45 degrees from each other. and then the protrusions 2 of the terminal plate fixing parts 21 ₁ to 21 ₁₂ of the bobbin 13.
0 into the recesses 23 ₁ to 23 ₁₂ of the terminal plate 15,
The ring-shaped coil 14 is connected to the center opening 2 of the terminal plate 15.
The ring-shaped coil 14 is fixed to the terminal plate 15 by, for example, heat-sealing the tip of each protrusion 20 protruding in the axial direction from the rear of the terminal plate 15 to the terminal plate 15, and the ring-shaped coil 14 is fixed to the terminal plate 15 and positioned. do. in this case,
The protrusion 20 is formed longer than the thickness of the terminal plate 15. Of course, the bobbin 13 can be removed by means other than the above.
may be fixed to the terminal plate 15 and positioned.

Since the present invention is configured as described above, the ring-shaped core can be disposed in contact with the back surface of the bobbin body 18 and in contact with the other leg portion 12b of the segment 12, so that the inner diameter of the core can be 1
8, and the inner diameter of the core can be made smaller by the thickness of the bobbin compared to the conventional case where a bobbin is also present on the inner diameter surface of the core. Therefore, since the core is closer to the cathode ray tube, there is a great advantage that sensitivity is increased. It also has the advantage of being cheaper because it saves on materials. Note that since the other leg portion 12b of the segment 12 of the bobbin 13 is in contact with the inner diameter surface of the core in the axial direction, it functions as a separator for the coil, and therefore does not interfere with the winding operation of the coil at all. do not have.

In this case, the other leg 12b of the segment 12
The length of the ring-shaped core is preferably selected to be approximately equal to the length of the ring-shaped core in the axial direction.

The embodiments described above are for illustrating the present invention, and therefore, it goes without saying that various modifications and changes may be made as necessary in addition to those described above and illustrated.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of a color cathode ray tube convergence device equipped with a ring-shaped coil using a bobbin according to the present invention, Figure 2 is a front view of Figure 1, and Figure 3 is a ring-shaped coil according to the present invention. A front view showing one embodiment of a coil bobbin, FIG.
Figure 5A is a sectional view of Figure 3 taken along line 5A-5A, Figure 5B is a cross-sectional view of Figure 3 taken along line 5B-5.
FIG. 6 is a cross-sectional view taken along line B, and a plan view of the terminal board used in the device of FIG. 1. 12: Segment of bobbin, 12a: One leg of segment, 12b: Other leg of segment, 13: Ring-shaped bobbin.

Claims (1)

[Scope of utility model registration request] In a convergence device for a color cathode ray tube that uses a ring-shaped coil in which a required coil is wound in a toroidal shape around a ring-shaped core, a plurality of coils protrude in the axial direction from an inner diameter part of a ring-shaped bobbin in which the ring-shaped core is disposed. A convergence device for a color cathode ray tube, characterized in that protrusions are formed at approximately equal intervals, and the inner diameter surface of the ring-shaped core is disposed in opposition to the protrusions of the ring-shaped bobbin.