JPH0733359Y2 - Deflection yoke device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a deflection yoke device, and more particularly to a structure for fixing a saddle-shaped wound vertical deflection coil to a bobbin.

[Prior Art] As a device mounted on the neck portion of a CRT for deflecting an electron beam traveling inside the CRT, that is, a deflection yoke device, one disclosed in, for example, Japanese Utility Model Publication No. 60-1490 is known. There is.

In this conventional example, for example, a deflection coil having a structure similar to that disclosed in Japanese Patent Publication No. 57-55179 is used.

The deflection coil in this conventional example is a so-called bentless saddle-shaped deflection coil (hereinafter referred to as a bentless coil) formed by extending a tail crossing portion in a straight line.

That is, the deflection yoke device of this conventional example is a horizontal deflection coil (hereinafter, referred to as an H coil) that is a ventless coil.
And a vertical deflection coil (hereinafter referred to as a V coil) which is also a ventless coil, a bobbin on which the H coil and the V coil are mounted, and a core fitted on the V coil. That is, inside the morning glory bobbin,
The H coil is inserted, and the V coil is mounted on the outer surface of the bobbin. Further, the core is fitted so as to press the V coil on the outer surface of the bobbin to form an integral deflection yoke device. Then, the electron beam is deflected by the horizontal and vertical deflection magnetic fields generated by the H coil and the V coil.

[Problems to be Solved by the Invention] However, in the conventional deflection yoke device having such a configuration, when the V coil is pressed by the core,
Coil slippage, backlash, and the like are likely to occur, and there is a problem in the position accuracy of the V coil.

The present invention has been made to solve the above problems, and an object thereof is to obtain a deflection yoke device in which the positional accuracy of the V coil is improved.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a rib on the outer surface of the bobbin near the head at a distance narrower than the width of the window portion of the head crossover portion of the V coil. A plurality of protrusions are provided, and the head coil connecting portion of the V coil is sandwiched between the rib and the flange portion of the bobbin.

[Operation] In the deflection yoke device of the present invention, the rib extending from the outer surface of the bobbin near the head supports the head crossover portion of the saddle-shaped wound V coil. The distance between the rib and the flange of the bobbin can be determined by design according to the thickness of the head connecting wire portion of the V coil.
The coil is prevented from slipping, rattling, etc., and the positional accuracy of the V coil is improved. Further, by determining the thickness of the rib, the position of the core in the neck-head direction can be restricted at the same time. Further, since the ribs are provided so as to project at a narrower interval than the width of the window portion of the V coil head connecting wire portion, the V coil head connecting wire portion has a degree of freedom with respect to the rotating direction of the bobbin. Therefore, this degree of freedom is used to reduce V to reduce crosstalk.
The position adjustment of the coil can be executed.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a deflection yoke device according to an embodiment of the present invention.

The deflection yoke device shown in this figure is a bobbin 10 having a bobbin shape having a flange portion 10a, and a ventless coil wound around the outer surface of the bobbin 10, and a head crossover portion 12a.
With two V coils 12 and a core 14 made of a magnetic material such as ferrite that holds the V coils 12 against the bobbin 10.
And two H coils (not shown) that are mounted inside the bobbin 10 and are bentless coils similar to the V coil.

Further, in this embodiment, a fixing rib 16 which is a feature of the present invention is provided, and the fixing rib 16 presses the head crossing portion 12a of the V coil 12 so as to press the bobbin 1.
It is provided so as to project from the outer surface near the flange portion 10a of 0.

2 to 4, the bobbin 1 constituting this embodiment is shown.
The configurations of 0, V-coil 12 and core 14 are shown respectively.

In FIG. 2, the bobbin 10 is provided with four fixing ribs 16 according to the features of the present invention. The four fixing ribs 16 are arranged in pairs, and two fixing ribs 16 are arranged close to each other. The paired fixing ribs 16 press the head crossover portion 12a of the V coil 12 respectively.

Next, a procedure for assembling the deflection yoke device according to the embodiment having such a configuration will be described.

5 (a) is a plan view of the bobbin 10 and FIG. 5 (b).
FIG. 3 is a side view of the bobbin 10.

FIGS. 6 (a) and 6 (b) show a state in which the bobbin 10 as shown in FIG. 5 is mounted with the V coil 12 as shown in FIG. That is, by mounting the V coil 12, which is a ventless coil, on the taper portion of the bobbin 10 by accommodating the head crossover portion 12a between the flange portion 10a of the bobbin 10 and the fixed rib 16, as described above. 2 V coils
The bobbins 10 are arranged on both sides of the bobbin 10 in parallel.

After that, by mounting the core 14 shown in FIG. 4 on the outer periphery of the V coil 12, a deflection yoke device having the structure shown in FIG. 1 can be obtained. Further, for example, the neck portion of the bobbin 10 can be obtained. The V coil 12 is fixed via the core 14 by fitting a fixing portion such as a bobbin cap.

According to the deflection yoke device of this embodiment having such a configuration, the head crossing portion 12a of the V coil 12 is held by the fixed rib 16 and the flange portion 10a of the bobbin 10, and the position of the V coil 12 is regulated. It As a result, in the conventional deflection yoke device that does not include the fixed rib 16, when the V coil 12 is pressed by the core 14, the taper of the plane of the core 14 and the shape of the V coil 12 do not match, and the head portion Although the crossover portion 12a is slipped or otherwise misaligned, such misalignment is prevented in this embodiment, and the positional accuracy of the V coil 12 is improved.

The V coil 12 can slide in the left-right direction of the V coil 12 (rotational direction about the axis of the bobbin 10), but generally, fine adjustment of the position of the V coil 12 in the left-right direction is required to reduce crosstalk. Therefore, sliding in this direction is not unnecessary. Usually, the V coil 12 is fixed to the bobbin 10 with a hot melt adhesive or the like after the completion of the black stroke adjustment.

Further, the fixing rib 16 according to the feature of the present invention is also effective for preventing the backlash of the core 14, and the position of the V coil 12 and the core 14 can be restricted at the same time.

In this embodiment, the fixing ribs 16 have the respective V
Two coils 12 are provided, but the number of the fixing ribs 16 is not limited to two. When two bobbins 10 are provided as in this embodiment, it is possible to prevent the rotation slip around the axis perpendicular to the axial direction of the bobbin 10.

Further, in other FIG. 6, the length of the fixing rib 16 is drawn so as to protrude to the middle of the head connecting wire portion 12a of the V coil 12, but the length of the fixing rib 16 is It suffices that it protrudes outward from the inner diameter of the head connecting wire portion 12a, and further, the disposition position of the fixing rib 16 is narrower than the width of the window portion of the head connecting wire portion 12a for each V coil 12. . Further, the thickness of the fixing rib 16 may be determined according to the thickness of the head connecting wire portion 12a of the V coil 12 and the shape of the core. In other words, even when the core 14 is positioned, the fixing rib 16 may be formed.
16 is valid.

Although the ventless coil is used as the V coil 12 in the present embodiment, the present invention is not limited to the ventless coil, and a coil having a vent may be used.

[Effects of the Invention] As described above, according to the present invention, the V coil can be prevented from slipping, rattling, etc., and the positional accuracy of the V coil can be improved. Further, since ribs for sandwiching the head crossover wire of the V coil with the flange portion of the bobbin are provided at a narrower interval than the width of the window portion of the head crossover wire portion of the V coil, Since the head crossover portion has a degree of freedom of movement with respect to the rotation direction of the bobbin, V
The position of the coil can be adjusted to reduce crosstalk.

[Brief description of drawings]

FIG. 1 is a side view showing the structure of a deflection yoke device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the structure of a bobbin according to the present invention, and FIG. 3 is a V coil according to the present invention. FIG. 4 is a perspective view showing a winding structure, FIG. 4 is a perspective view showing a shape of a core in the present invention, and FIG. 5 is a work-in-process shape diagram for explaining an assembling procedure of the present embodiment. FIG. 6A is a plan view of the bobbin, FIG. 5B is a side view of the bobbin, and FIG. 6 is a work-in-process shape diagram of this embodiment, similar to FIG. FIG. 6A is a plan view when the V coil is mounted on the bobbin shown in FIG. 5, and FIG. 6B is a side view. 10 …… bobbin 10a …… flange section 12 …… V coil 12a …… head crossover section 14 …… core 16 …… fixing rib

Claims (1)

[Scope of utility model registration request] 1. A deflection yoke device comprising at least a boshbin-shaped bobbin, a vertical deflection coil wound on the outer surface of the bobbin in a saddle shape, and a core mounted outside the vertical deflection coil. On the outer surface of the bobbin near the head, a plurality of ribs are provided at intervals smaller than the width of the window of the head crossover part of the vertical deflection coil, and between the rib and the flange of the bobbin. A deflection yoke device in which a head crossover portion of the vertical deflection coil is sandwiched.