JPH0355813A - Winding method of deflecting coil - Google Patents

Abstract

PURPOSE:To obtain a winding method, through which no strain is generated after completion, by previously abutting the intermediate point of the whole wire against a die for winding the wire and alternately winding the wire in a section from the intermediate point to one end and that from the intermediate point to the other end in the opposite directions. CONSTITUTION:An intermediate point 8 in the whole wire is abutted previously against a die for winding the wire constituted for forming a coil in an aimed shape, and a wire 5a in a section from the intermediate point 8 to one end and a wire 5b in a section from the intermediate point 8 to the other end are wound on said die for winding the wire alternately at the same time or at every specified number. An electric wire 5 in the half of quantity required for completing one coil is wound on a temporary winding bobbin 6, and the intermediate section 8 of the electric wire 5 is fixed to a wire fixing means on a key body 4. An electric-wire guide member 7 and the temporary winding bobbin 6 are turned simultaneously in the opposite directions in order to rotate the wire 5a on the main bobbin side in the direction of the arrow A and the wire 5b on the temporary winding bobbin 6 side in the direction of the arrow B, and the wire 5a and the wire 5b are wound on the die for winding the wire so as to be crossed by bent-up sections 2, 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of winding a deflection coil attached to a cathode ray tube.

Prior Art FIG. 10 shows a saddle-shaped deflection coil of a deflection yoke mounted on a cathode ray tube. One way to make such a saddle-shaped coil is to use a pair of molds shown in Figure 14, and with these two molds joined together as shown in Figure 15, a special mold is used for this mold. There is a method of winding the wire using a winding machine, and before removing the resulting wire bundle from the mold, an electric current is passed through the wire to generate heat and fix each wire. In Figure 14,
12 is a first mold, and 13 is a second mold, and when they are fitted together as shown by the arrows, the state shown in FIG. 15 is obtained.

In FIG. 15, 14 is a wire guide member, and 15 is a wire drawn out from the wire guide member. The wire is wound around the mold by rotational movement of the wire guide member 14 around the mold in a single direction, the direction of arrow C. To explain the steps below, first, the first mold 12 and the second mold 13 are fitted together as shown in FIG. 15. Next, the end of the wire pulled out from the wire guide member 14 is fixed to something other than the mold. Next, the electric wire guide member is rotated. FIG. 11 shows only the coil in the winding process. After winding the wire a predetermined number of times, the wire is cut and the beginning and end of the winding are connected to a power source and a predetermined current is applied to generate heat.

Problems to be Solved by the Invention The conventional method as described above fixes the end of the wire,
The wire guide member is simply wound in one direction while being turned. By the way, when winding the wire, some tension is applied to the wire, and in that state the wire is wound only in one direction. However, there is a force in the wire that causes it to shrink, and that force does not disappear even after the wire has been wound. This remains as stress in the completed coil, and this stress causes distortion in the completed coil as shown in FIGS. 12 and 13.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for winding a deflection coil that does not cause distortion after completion.

Means for Solving the Problems In order to solve the above problems, the present invention first places the middle point of the entire wire in a wire winding die and winds the section from the middle point to one end, that is, the first section. The line and the section from the midpoint to the other end, that is, the line of the second section, are rotated in opposite directions.

When the action is completed, the stress generated on the line of the first section and the stress generated on the line of the second section act to distort the deflection yoke in opposite directions, and as a result, the effects are They will be killed off.

EXAMPLE Hereinafter, an example of a method for winding a deflection coil according to the present invention will be described. FIG. 1 is a perspective view of the deflection coil in this embodiment. In FIG. 1, 1 is a central opening, 2 is a pend-up portion formed in a small diameter part on the electron gun side, and 2 is a large diameter part on the phosphor screen side. It is a pend-up part formed in the part.

The winding operation will be explained below. In Figure 2, 4
Reference numeral denotes a key body interposed between a pair of molds, 6 a temporary winding bobbin for temporarily winding up half of the required wire, and 7 a wire guide member. First, the tip of the electric wire 5 pulled out from the electric wire guide member 7 is fixed to the temporary winding bobbin 6, and the temporary winding bobbin 6 is rotated. Then the main bobbin (
The electric wire 5 that was wound around the temporary winding bobbin 6 (not shown)
It is wound up. When half of the electric wire 5 required to complete one coil is wound onto the temporary winding bobbin 6, the rotation of the temporary winding bobbin 6 is stopped and the temporary winding operation is completed. FIG. 2 shows a state in which the temporary winding operation has been completed. 8 is the middle part of the wire 5, that is, the middle part of the whole wire necessary to complete one coil.

When the temporary winding operation to the temporary winding pobin 6 is completed,
The intermediate portion 7 of the electric wire is fixed to the wire fixing means on the key unit 4. Then, the wire guide member 7 and the temporary winding bobbin 6 are simultaneously rotated in opposite directions in order to rotate the wire on the main bobbin side in the direction of arrow 8 and the wire on the temporary winding bobbin 6 side in the direction of arrow B.

Then, the wire 5 is pulled out from the wire guide member 7 and the temporary winding bobbin 6, respectively, and wound around the respective wire winding molds. These series of operations are all automatically performed by numerical control in accordance with predetermined numerical data input in advance.

FIGS. 3 to 7 show this situation in detail. In FIG. 3, 5a is a line drawn out from the main bobbin, and 5b is a line drawn out from the temporary winding bobbin 6. Line 5a moves in the eight directions of arrows, and line 5b moves in the direction of arrow B. At this time, the wires 5a and 5b intersect at the pend-up portion 3 on the large diameter side and the hand-up portion 2 on the small diameter side. For example, on the large-diameter side, as shown in FIGS. 5 and 6, by intersecting the lines 5a and *5b, the intersection will be located at the pend-up portion 3. Also, in the pend-up part 2 on the small diameter part side opposite to that part, the line 5
The line a intersects with the line 5b.

Here, if the speed of movement of the wire guide member 7 and the temporary winding bobbin 6 is maintained constant, the intersecting parts will gather at the pend-up parts 3 and 2 on the large diameter part side and the small diameter part side. No intersection occurs in the other straight portions 9 and 10.

Effects of the Invention As described above, in the present invention, the middle point of the entire wire is first placed in a wire winding mold, and the line in the section from the middle point to one end and the section from the middle point to the other end are separated. By winding the wire into the above-mentioned wire winding mold simultaneously or alternately at every predetermined number of floors,
The stress caused by the wire in one section and the stress caused by the wire in the other section are canceled out, and no distortion occurs in the coil in the completed state.

[Brief explanation of drawings]

Fig. 1 is a plan view of a saddle-shaped deflection coil according to an embodiment of the present invention, Fig. 2 is an explanatory diagram when winding is performed using the winding method of the same embodiment, Figs. 3, 4, and 5. , FIGS. 6 and 7 are explanatory diagrams showing the same winding method in order, FIG. 8 is a rear view of the saddle-shaped deflection coil in the same embodiment, FIG. 9 is a side view of the same, and FIG.
Figure 0 is a perspective view of a conventional saddle-type deflection coil, Figure 11 is an explanatory diagram showing a conventional method of winding a saddle-type deflection coil, and Figure 12 is a diagram of a saddle-type deflection coil wound using a conventional method. Rear view,
FIG. 13 is a side view of the same, FIG. 14 is a perspective view showing a mold used for the winding, and FIG. 15 is a perspective view showing the state of the winding. 1: Central opening 2, 3: Pend-up section 4: Key unit 7: Wire guide members 9, 10: Straight section 12: L-th mold 6: Temporary winding bobbin 8: Intermediate section 3: Second mold

Claims (1)

[Claims] First, apply the midpoint of the entire wire to a wire winding mold configured to shape the coil into the desired shape, and then insert the wire in the section from the midpoint to one end and the section from the midpoint to the other end. A method of winding a deflection coil, characterized in that the wires of the sections are wound around the wire winding mold simultaneously or alternately every predetermined number of times.