JPH0227775B2 - TOROIDARUGATAHENKOYOOKU - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a toroidal deflection yoke that is attached to a cathode ray tube of a television receiver or the like and deflects an electron beam emitted from an electron gun.

Conventional structure and its problems Traditionally, the deflection yoke has an all-saddle type deflection yoke in which both horizontal and vertical deflection are performed using a coil wound in a saddle shape (hereinafter referred to as a saddle-shaped coil), and a horizontal deflection yoke. A semi-toroidal type deflection yoke that uses a saddle type coil for deflection, and a toroidal type coil for vertical deflection (hereinafter referred to as a toroidal type coil), and a toroidal type coil for both horizontal and vertical deflection. , all-toroidal deflection yoke. Of the above two types of coils, Figure 1 shows a side view and a perspective view of the toroidal type coil.
Shown in ab. The explanation will be given below according to the drawings.

Generally, a toroidal coil has a semicircular core 1
After winding 2 is applied to each, the two are used in combination. The semicircular core 1 is provided with steps 1a above and below the side end surface for the purpose of positioning the winding 2. When winding 2 around the core 1, a part of the core holding arm 3 of the winding machine fits into the step 1a to ensure reliable positioning. The turned winding 2 is the core 1
In order to improve the convergence characteristics, the core neck part 1b is wound in a concentrated manner to form a barrel magnetic field, and the core head part 1c is
For the purpose of distributing the winding to create a pin magnetic field, the winding is performed diagonally around the core, that is, in the direction of arrow A. For this reason, winding is difficult, and the winding may become misaligned even after winding.
This method has drawbacks such as uneven magnetic field distribution when energized. Therefore, as shown in FIG. 2, a coil frame 4 made of resin is fixed to the neck portion 1b and head portion 1c of the core 1 with an adhesive or the like. The coil frame 4 is configured such that the wire is wound between a plurality of guides 4a arranged upright in a comb shape.

However, as mentioned above, this coil frame 4 was fixed with adhesive, etc., so it took time for the adhesive etc. to harden, and the winding was done before the adhesive etc. completely hardened. However, there were problems in that the position of the coil frame 4 was shifted and the required magnetic field distribution could not be obtained.

OBJECTS OF THE INVENTION An object of the present invention is to provide a toroidal deflection yoke having a toroidal coil that solves the above-mentioned conventional problems.

Structure of the Invention In the toroidal deflection yoke of the present invention, steps are provided at both ends of the neck portion of the core divided into two and at both ends of the head of the same core, while a plurality of steps are provided on the upper surface of the resin-molded coil frame. A guide is set upright, a step is provided at the end of the coil frame to fit into the step provided on the core, and an ear is provided on the outer periphery of the coil frame, so that the coil frame is fitted to the core. By fixing the core, there is no need to use other bonding means such as adhesive, and furthermore, the windings wound around the core can be reliably positioned.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, a step 5a is provided that fits into the step 1a by utilizing the steps 1a at both ends of the neck and both ends of the head of the core 1, which were conventionally provided for the purpose of positioning the winding. In addition, the coil frame 5, which has an ear portion 5b and a plurality of guides 5c and is made of a flexible material, is attached to the neck portion 1b of the core 1.
and the head 1c. As shown in FIG. 4, the radius of curvature R of the coil frame 5 is slightly smaller than the radius of curvature r of the core 1.

Next, the state in which the coil frame 5 is attached to the core 1 will be explained. The step 5a of the coil frame 5 fits into the step 1a of the core 1, and the ear portion 5 of the coil frame 5 fits into the step 1a of the core 1.
b is attached by pressing the core 1. Here, as described above, the radius of curvature R of the coil frame 5 is slightly smaller than the radius of curvature r of the core 1, so when the coil frame 5 is attached to the core 1, the step 5a of the coil frame 5 A pulling stress is generated in the ear part 5b and the ear part 5b, making the attachment more secure.
In addition, since the guide 5c is provided, there is no deviation in the winding position of the winding wire, so there is no variation in quality in the manufactured products. Since no adhesive or the like is used for attachment, there is no need to wait for the adhesive or the like to harden, and this also leads to a reduction in manufacturing costs.

Although one embodiment has been described above, the coil frame 5
It goes without saying that the ears 5b may be provided on both the outside and inside of the coil frame, or may be provided in plural pieces or over the entire coil frame.

Effects of the Invention As explained above, the present invention provides a step on the side end surface of the core, and a step that fits into the step on the side end surface of the core on the coil frame attached to the neck and head of the core. is provided, and an ear is provided on the outer periphery,
In addition, since multiple guides are provided on the top surface, the coil frame can be easily and reliably attached to the neck of the core and the head without the use of adhesives, leading to reduced manufacturing costs. , since it is provided with a guide, it is extremely effective in practice in that the winding position of the winding can be reliably determined.

[Brief explanation of drawings]

Figures 1a and b are side views and perspective views of a conventional toroidal coil, Figure 2 is a perspective view of a conventional toroidal yoke in which a coil frame is attached to the neck and head of the core, and Figure 3 is a side view and perspective view of a conventional toroidal coil. FIG. 4 is a perspective view of a toroidal deflection yoke according to an embodiment of the invention, and FIG. 4 is a side view of the same embodiment. 1...Core, 1a...Step, 1b...Network portion, 1c...Head, 2...Winding, 5...Coil frame, 5a...Step, 5b...Ear portion, 5c...Guide.

Claims (1)

[Claims] 1. A first step is provided at both ends of the neck portion of the semi-rapper-shaped core and both ends of the head of the core, and the first step is provided at both ends of the coil frame attached to the neck portion of the core and the head. A second level difference that fits into the first level difference is provided, ears are provided on the outer periphery of both coil frames, and a plurality of comb-shaped winding guides are provided on the upper surface of both coil frames, so that the core neck A toroidal type deflection yoke, wherein the coil frame is attached to a portion and a head portion, the first step and the second step are fitted together, and the ear portion is attached to a side surface of the core.