JPH04184845A - Horizontal deflective winding device for deflection yoke and manufacture of device - Google Patents

Abstract

PURPOSE:To enhance the assembly accuracy and reduce costs by making a bobbin for horizontal winding in the form of ring-shaped fragments generated through dividing with a plane perpendicular to the tube axis direction, and butting the edges of these fragments to accomplish a single piece construction. CONSTITUTION:A horizontal bobbin for horizontal winding assumes fragments generated by dividing with dividing parts 19, 21 situated in a plane perpendicular to the tube axis (Z-axis) and is composed of a screen part 23, intermediate part, and neck part 27. The butting edges of these dividing parts have small wall thickness 29 and have a complementary form to allow yielding a consolidated structure when assembled. The dividing may produce only two fragments. The screen part 23, intermediate part 25, and neck part 27 of this horizontal bobbin are provided with ribs 37, 39, 41 for forming respective slots 31, 33, 35. A plurality of hooks 43, 45 for winding a horizontal deflection winding are formed at the screen end and the neck end, respectively. The horizontal winding is embodied in saddle winding through utilization of these hooks and slots.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a deflection yoke for a picture tube device, and more particularly to a deflection yoke whose design and manufacturing process can be easily controlled. In more detail, we will control the horizontal winding distribution (H magnetic field distribution), eliminate unnecessary changes in the horizontal winding bobbin (H bobbin) due to the inch size of the picture tube and impedance deflection, and make common use of component parts. This invention relates to a deflection yoke for picture tubes that enables reduction of variations by reducing the number of steps and improving assembly accuracy.

[Prior art]

A conventional slit bobbin type deflection yoke is shown in FIGS. 1 to 5, in which a trumpet-shaped two-part magnetic ferrite core 1 is equipped with a vertical deflection coil (not shown) that generates a vertical deflection magnetic field (the magnetic field direction is horizontal). Either toroidal winding is performed directly, or a 4.4° vertical saddle coil (V coil) consisting of two parts is provided on the inner surface of the ferrite core 1 as shown in Fig. 2.
Alternatively, a vertical axis (Y axis) two-split vertical winding guide (V bobbin) 2.2° having a large number of guide grooves or slits (neck end side 5, screen end side 6) as shown in Fig. 3 is provided. Using these slits as guides, seven windings are applied, and a 3.3° integrated or horizontal bobbin (H bobbin) with a number of guide grooves or slits 7 with a horizontal axis (X axis) is provided on its inner surface. A horizontal deflection coil (H coil) that generates a horizontal deflection magnetic field (the magnetic field direction is vertical) is wound there. The second object of the present invention is to improve the horizontal bobbin (H bobbin) in such a horizontal and round deflection yoke. The conventional horizontal bobbin, as shown in Figs. 1 and 4,
It is a one-piece type or an X-axis two-piece horizontal bobbin. Such a horizontal bobbin is made of a plastic molded body with specific dimensions to match the dimensions and characteristics of the picture tube, and is provided with a large number of slits 7 extending in the tube axis direction or at an angle thereto. Since the saddle-shaped horizontal deflection coil is wound, the winding position is stable and a horizontal deflection coil with stable characteristics can be obtained.

[Problem to be solved by the invention]

In general, bobbins have a large number of turns, so there is a lot of freedom in winding design, but integrated or X-axis two-split horizontal bobbins have fewer windings, so there is less freedom in design when changing impedance.
Further, there is a problem in that different sizes of picture tubes require horizontal bobbins of different sizes, which increases the manufacturing cost of the horizontal bobbins. Furthermore, even when the dimensions are the same, the conventional X-axis two-split horizontal bobbin is relatively easily deformed by external force applied in the radial direction, causing variations in product characteristics. Therefore, an object of the present invention is to provide a highly accurate horizontal deflection winding device using a horizontal bobbin with a structure that reduces manufacturing costs.

[Means to solve the problem]

The present invention employs a split structure that allows horizontal bobbins of various sizes to be constructed in order to manufacture horizontal deflection winding devices of various sizes from a minimum number of members. but,
The horizontal bobbin dividing structure of the present invention is not divided into two parts in the direction of the tube axis (Z-axis) as in the past, but is done in a plane perpendicular to the tube axis, thereby providing manufacturing flexibility. increases significantly. That is, the present invention provides a horizontal winding bobbin in the shape of a horn having a plurality of slits on the inner surface extending in the axial direction of the picture tube.
The annular divided piece is divided into two or three planes perpendicular to the tube axis direction, the edges of these divided pieces are butt to form an integral structure, and a horizontal winding is wound around the slit. A horizontal deflection winding device for a deflection yoke is provided. In this case, it is advantageous if each pair of abutted edges of the divided pieces are formed in a step-like shape complementary to each other. When a divided piece has a neck part, a screen part, and an intermediate part, it is called an intermediate part, and in the method of the present invention, at least one of the divided pieces on the neck side and the screen side (and the intermediate part) is prepared in two or more types, By changing these combinations according to the dimensions of the picture tube, assembling them, and applying the prescribed windings, a wide variety of horizontal bobbins can be constructed from the minimum material and number of members, and the number and distribution of windings can be adjusted accordingly. The present invention, which allows a wide range of characteristics to be designed by changing the characteristics, has a particularly large material saving effect, and since the divided pieces are annular, they are not easily deformed by external forces and have good dimensional accuracy. The invention will be explained in detail with reference to examples. In the present invention, the horizontal bobbin has an axis (x,
It is manufactured in a shape divided along a plane including the y-axis). On the other hand, vertical bobbins can be used or not.
If used, a one-piece type or a Y-axis bipartite type can be used. The two-split type has the advantage of being easy to wind, since it can be combined after winding. If a bobbin is not used, a vertical toroidal winding that winds the magnetic ferrite core directly or a vertical saddle winding may be used. The magnetic ferrite core may be of an integrated type or may be of a type divided along the Y axis. In the case of dividing the Y-axis into two, two conventionally used clips or hooks may be used. The following examples describe specific combinations of these measures and should not be construed as limiting. 6 to 8 show a magnetic ferrite core 11 used in the embodiment. The core 11 is divided into two along the vertical axis (Y axis). The core halves are fixed to each other by inserting the ends of two spring clips (not shown) into the four fixing grooves 13. The inner surface of the core 11 is provided with a plurality of slots (grooves) 15 extending in the direction of the tube axis or at an angle with respect to the tube axis, and a vertical winding ( (not shown) are saddle wound in these grooves to create a vertical deflection field (horizontal field) within the core. 9 to 11 are cross-sectional views showing the structure of a plastic horizontal bobbin 17 according to the present invention. First, the horizontal bobbin has a shape divided by dividing parts 19 and 21 on a plane perpendicular to the tube axis (two axes), and is composed of a screen part 23, an intermediate part 25, and a neck part 27. The abutting edges of these divided portions become thinned portions 29, which are complementary to each other and are combined into one body. Prepare at least one of these divided pieces with different dimensions, select the one that suits your purpose, and use it in combination.You can use two zero-divided pieces instead of the three shown. Of the bobbin, the screen part 23, the middle part 25 and the neck part 27 each have ribs 37 for forming slots 31, 33, 35.
．． It has 39.41. Furthermore, a plurality of hooks 43, 45 for winding horizontal deflection windings are formed at the screen end and the neck end, respectively. Horizontal windings are saddle wound using these hooks and slots. FIG. 10 is an assembled view of a deflection yoke using the horizontal bobbin 17 of the present invention. Windings are omitted for ease of understanding. The ferrite core 11 is supported from the outside by a support frame 47 made of plastic. The support frame 47 has a plurality of hooks 49.5 at the screen end and neck end.
1 to assist in winding the vertical deflection windings into the slots 15 of the core 11. A horizontal bobbin 17 according to the present invention is fixed on the inner surface of the core 11, and a horizontal deflection winding is applied to the surface using slots 31, 33, 35 and hooks 43, 45.6 In the design and manufacturing process,
If the horizontal bobbin has a screen part, a neck part, or an intermediate part, prepare at least one, preferably two or more, of different sizes for the intermediate part. 0 When assembling, select from among them. A desired combination can be selected and assembled. However, it is necessary that only the divided portions to be butted have the same size and shape even if they are of different types.

【Effect of the invention】

As described above, according to the structure and manufacturing method of the horizontal bobbin of the present invention, there is no need to manufacture the entire bobbin for each dimension and characteristic, and it is possible to change the winding distribution in inch size by replacing a part of the horizontal bobbin. is possible, and impedance change (
Changes in the number of turns) can now be handled by replacing part of the horizontal bobbin, and the magnetic field in the middle, which is the key to horizontal magnetic field distribution, can be controlled by the slot formed by the rib formed on the middle split piece of the horizontal bobbin. Therefore, the annular structure reduces variations due to winding up and improved assembly accuracy, and further reduces costs due to common use.

[Brief explanation of the drawing]

Figure 1 is an assembled sectional view of a conventional deflection yoke for a picture tube.
Figure 2 is a front view of a conventional vertical deflection saddle coil viewed from the screen side, Figure 3 is a front view of a conventional vertical winding bobbin viewed from the screen side, and Figure 4 is a conventional horizontal winding bobbin. Fig. 5 is a front view of a conventional ferrite core using a core fastener as seen from the screen side, and Fig. 6 shows a ferrite core used in an embodiment of the deflection yoke of the present invention. A front view of the core seen from the screen side, FIG. 7 is a sectional view of the center, FIG. 8 is a plan view of the same, and FIG. 9 is a cross section including the tube axis (two axes) of the horizontal bobbin for horizontal winding of the present invention. 10 is an assembled sectional view of the deflection yoke of the present invention, and FIG. 11 is a front view of the horizontal bobbin of the present invention shown in FIG. 10 as viewed from the screen side. Figure 1 Figure 2 Figure 8 Figure 10

Claims (4)

[Claims] (1) A bugle-shaped horizontal winding bobbin is made into an annular divided piece divided by two or three planes perpendicular to the tube axis direction, and an image is received on the inner surface of each of these divided pieces. A deflection yoke characterized in that a plurality of winding guide slits extending in the axial direction of a tube are formed, the edges of which are butted together to form an integral structure, and a horizontal winding is wound using the slits. horizontal deflection winding device. (2) The horizontal deflection winding according to item 1, wherein the pair of abutting edges of the divided pieces are formed in a step-like shape complementary to each other, and each divided piece has a slit for guiding the winding. Device. (3) A split piece obtained by dividing a trumpet-shaped horizontal winding bobbin, which has a plurality of slits on its inner surface extending in the tube axis direction of the picture tube, into two or three planes perpendicular to the tube axis direction, Prepare divided pieces so that at least one of them has two or more different sizes, abut the edges of a pair of divided pieces selected from these to form an integral structure, and use the slit to horizontally A method for manufacturing a horizontal deflection winding device for a deflection yoke, characterized by winding a winding wire. (4) The method for manufacturing a horizontal deflection winding device according to item 3, wherein each pair of edges of the divided pieces to be butted are formed in a step-like shape complementary to each other.