JPH0425801Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a deflection yoke equipped with an auxiliary deflection coil for horizontal scanning velocity modulation.

(b) Prior art The deflection yoke used in so-called beam index television receivers that reproduce color images using a single electron beam is equipped with an auxiliary deflection coil called a chroma scan coil for horizontal scanning velocity modulation. We need to be prepared.

This auxiliary deflection coil was conventionally used, for example, in the 1980s.
As shown in Japanese Patent No. 744, it is desirable to have an integral structure with the main deflection yoke. However, according to the above publication, in order to attach the auxiliary deflection coil to the coil separator, the auxiliary deflection coil is wound in advance into a pair of air-core saddle-type coils, and is then formed on the inner periphery of an annular auxiliary coil holder. This holder is attached to the outer periphery of the neck holder.

However, the conventional deflection yoke described above requires a separate auxiliary coil holder, which increases the number of parts.

After the auxiliary deflection coil is attached to the auxiliary coil holder, it is attached to the neck holder, which increases the number of work steps.

The preformed auxiliary deflection coil has very low strength and may be deformed before it is installed.

Since the auxiliary deflection coil has a small number of turns, 2 to 5 turns, it is necessary to use self-bonding wire or use tape or adhesive to prevent the wire from coming apart.

It has many drawbacks such as.

(c) Problems that the invention aims to solve This invention was created in view of the above points,
The object of the present invention is to provide a deflection yoke that reduces the number of parts and work steps, and eliminates the need to form an auxiliary deflection coil in advance.

(d) Means for solving the problem The present invention combines a pair of air-core saddle type auxiliary deflection coils and a main deflection coil used for horizontal scanning velocity modulation into one.
In the deflection yoke held by one holder, the holder is provided with a pair of coil winding ribs and a plurality of wire locking ribs.

(E) Function The present invention functions to form an auxiliary deflection coil by winding a wire around a coil winding rib and locking it onto a wire locking rib.

(f) Example An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the deflection yoke of this embodiment. In the figure, 1 is a saddle-shaped horizontal deflection coil, 2 is a toroidal-shaped vertical deflection coil wound around a core 3, and 4 is a horizontal and vertical deflection coil. A holder holds the coils 1 and 2, 5 is an air-core saddle-type auxiliary deflection coil wound around this holder, and 6 is a centering magnet.

Figure 2 A to D are top views and front views of the holder 4;
The A-A′ cross-sectional view and side view of FIG. 4 are shown.
Reference numerals a and 4a denote a pair of U-shaped coil winding ribs, and the auxiliary deflection coil is wound in the gaps 4b and 4b formed between these ribs and the outer periphery of the holder in accordance with the procedure described later. 4c, 4c and 4d, 4d
... are the first and second locking ribs that lock the winding in the middle of winding, 4e, 4e... are the third locking ribs that lock the winding in the middle of winding, at the beginning and at the end of winding. can be,
The upper parts of the first and second locking ribs are elastic tongue pieces 4f,
It has a function of holding the centering magnet 6 together with the centering magnet 4f.

4g, 4g are a pair of clamping ribs that clamp the clamping ring 7 for fixing the holder to the cathode ray tube neck (not shown), and 4h is a positioning rib that fits into the through hole 7a formed in the clamping ring. It is a protrusion.

Next, the method of winding the auxiliary deflection coil in this embodiment will be explained according to FIGS. 3A and 3B to 6A and 6B.

First, as shown in FIG. 3A and B, the wire 8 is wound around one of the third locking ribs 4e at the lower right in the figure for at least one turn, and then it is wound once around the coil winding rib 4a. , Fold back to the lower second locking ribs 4d, 4d in the figure.
Attach the locking piece to the

Next, as shown in FIGS. 4A and 4B, the wire rod 8 locked on the second locking ribs 4d, 4d is further wound around the coil winding rib 4a, and then the third locking rib 4e at the lower left in the figure and is locked to the first locking rib 4c on the left side in the figure. In this state, one air-core saddle type coil is formed.

Furthermore, as shown in Figures 5A and 5B (note that Figure 5A and Figure 6B, which will be described later), are views seen from the opposite side of Figure 3A and Figure 4A, and Correspondingly, the tops and bottoms of Figure B and Figure 6B are reversed. After passing through the stopper ribs 4d, 4d, the coil is wound around the coil winding rib 4a from the opposite direction. Furthermore, as shown in FIGS. 6A and 6B, the wire 8 is wound once more around the coil winding rib 4a, and then wrapped around the third locking rib 4e at the lower right in the figure for more than one turn. This completes the formation of a pair of air-core saddle-type auxiliary deflection coils.

(g) Effects of the invention As mentioned above, the present invention forms the auxiliary deflection coil by winding the wire directly around the holder of the main deflection coil, which makes it possible to reduce the number of parts and work processes, and also allows the auxiliary deflection coil to be assembled in advance. There is no need to form it.

[Brief explanation of the drawing]

Fig. 1 is a front view of a deflection yoke according to an embodiment of the present invention, and Fig. 2 A, B, C, and D are respectively a top view, a front view, and a sectional view taken along A-A' of the holder, and a side view of the deflection yoke. FIG. 3, FIG. 4, FIG. 5, and FIG. 6 are explanatory diagrams of the method of winding the coil, respectively. 1...Horizontal deflection coil, 2...Vertical deflection coil, 4...Holder, 5...Auxiliary deflection coil.

Claims (1)

[Scope of utility model registration request] A deflection yoke in which a pair of air-core saddle-type auxiliary deflection coils and a main deflection coil used for horizontal scanning velocity modulation are held in one holder, the holder having a pair of coil winding ribs and a plurality of wire rod locking parts. A deflection yoke comprising a rib, and the auxiliary deflection coil is formed by winding a wire around the coil winding rib and locking the wire into the wire locking rib.