JP2001216897A - Method of manufacturing coil of deflecting yoke and winder of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a coil of a deflecting yoke, capable of preventing the dispersion of characteristics such as convergence or the like, in an actual operation, and provide a device for executing this method. SOLUTION: This method of manufacturing a coil of a deflecting yoke comprises a step S1 for building the deflecting yoke into a CRT, and measuring event temperatures at the time of actual operation of a wire material constituting the coil of the deflecting yoke and a coil bobbin under an actual operating condition of the CRT, a step S2 for calculating the amount of thermal expansion of the coil bobbin caused by the difference between the temperature of the coil bobbin (environment temperature during winding) in winding the wire material on the coil bobbin and a temperature at the time of actual operation of the coil bobbin, a step S3 for determining the optimum temperature of the wire material at winding, for minimizing the lowering of the tension of the wire material under actual operating conditions on the basis of the temperature at the time of actual operation of the wire material and the amount of thermal expansion of the coil bobbin, and a step S4 for winding the wire material onto the coil bobbin with a rise of temperature to the optimum temperature, by heating the wire material to be supplied to the coil bobbin by a heater mounted near the coil bobbin, and jetting the air current to the coil bobbin to cool the coil bobbin, while winding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a coil for a deflection yoke and a coil winding device, and more particularly, to a deflection yoke which suppresses variations in various characteristics such as convergence in the actual operating state of the deflection yoke. The present invention relates to a method for producing a yoke coil and a coil winding device most suitable for the coil production method.

[0002]

2. Description of the Related Art A coil of a deflection yoke used in a CRT of a television receiver is wound in a section by winding a wire around a bobbin of the deflection yoke to form a coil, or by winding a wire around a mold. There is a die method of manufacturing a coil by using a method. When a coil is manufactured using a mold, a wire having a fusion layer on the outer surface of a conductive wire is used and wound around a mold having the same shape as the coil. At the end of winding, the coil wound around the mold is heated to melt the fusion layer, the wires are fused together to form a coil, and then the coil is removed from the mold. On the other hand, in the section winding method, the production of the coil is completed when the wire is wound around the coil bobbin.

Here, a section winding method of the coil of the deflection yoke will be described with reference to FIGS. FIG. 3 is a perspective view showing a configuration of a coil bobbin of the deflection yoke, and FIG. 4 is a schematic diagram showing a configuration of a coil winding device of a section winding method. The coil bobbin 10 of the deflection yoke is shown in FIG.
As shown in FIG. 5, a trumpet-shaped or frusto-conical shape having a first opening end 12 having a larger diameter on one side and a second opening end 14 having a smaller diameter than the diameter of the first opening end 12 on the other side. It is formed as a plastic cylinder 16. First
Hook-shaped claws 18A, B, C,... For hooking the wire material of the winding are provided on the opening edge of the opening end portion 12 corresponding to the number of windings.
They are sequentially provided along the opening edge. Similarly, hook-shaped claws 18a, b, c,... For hooking the wire of the winding are provided on the opening edge of the second opening end 14, and claws 18A, B, C of the first opening end 12. .. corresponding to the opening edge.

In a section winding deflection yoke coil,
As shown in FIG. 3, first, a wire 20 mainly containing copper is used.
Is hooked on the claw 18A of the first opening end 12 (however,
In FIG. 3, for convenience of illustration, the hook is hooked on another claw other than 18 </ b> A, and so on). Then, the wire 20 reaches the second open end 14 through the hollow portion of the cylindrical body 16, Nail 1
8a, and then passes through the hollow portion of the cylindrical body 16 in the reverse direction to reach the first open end portion 12, and the claw 18B adjacent to the claw 18A
Hanged on. Next, the wire 20 reaches the second opening end 14 again through the hollow portion of the cylindrical body 16, is hooked on the claw 18b next to the claw 18a, and then reverses the hollow portion of the cylindrical body 16 And reaches the first opening end portion 12 and is hooked on the claw 18C adjacent to the claw 18B. By repeating this,
A coil can be formed. In order to manufacture a coil by applying the section winding method, as shown in FIG. 4, the coil is manufactured by guiding the wire 20 using the guide 22 as described above.

[0005]

By the way, in the section winding method, when the wire is wound around the coil bobbin of the deflection yoke, the temperature of the coil bobbin and the wire is almost room temperature. On the other hand, in a state where the deflection yoke is mounted on the CRT and used (actual operation state), the temperature of the deflection yoke rises to a high temperature of about 100 ° C., so that the coil bobbin and the wire material expand according to their respective thermal expansion coefficients. The coefficient of thermal expansion of the coil bobbin is about 2.5 × 10 ⁻⁵ / ° C., and the coefficient of thermal expansion of the wire is about 1.6 × 10 ⁻⁵ / ° C., which depends on the structure and winding shape of the coil bobbin. ,mainly,
Due to this difference in the coefficient of thermal expansion, the tension load (tension) of the wire of the coil is reduced and loosened during actual operation, and the position of the wire is changed with respect to the coil bobbin. It changes from the shape. As a result, there is a problem that various characteristics of the deflection yoke, such as convergence, vary during actual operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a coil of a deflection yoke which can suppress variations in various characteristics such as convergence during operation, and an apparatus for implementing the coil manufacturing method.

[0007]

SUMMARY OF THE INVENTION In producing a section winding deflection yoke for winding a wire around a substantially cylindrical coil bobbin, the present inventor, when winding the wire around the coil bobbin, tensions the wire of the coil in actual operation. An experiment was conducted in consideration of controlling the temperature of the coil bobbin and the wire so as to minimize the decrease, that is, heating the wire in advance and winding it around the coil bobbin, and came to the present invention.

In order to achieve the above object, a method of manufacturing a coil of a deflection yoke according to the present invention is to provide a method of manufacturing a coil of a deflection yoke in a CRT, the actual operation of a wire and a coil bobbin constituting a coil of the deflection yoke in an actual state of the CRT. The temperature of the coil bobbin when the wire is wound around the coil bobbin, that is, the amount of thermal expansion of the coil bobbin caused by the difference between the ambient temperature at the time of winding and the actual temperature of the coil bobbin is calculated, and the actual operation of the wire Based on the time temperature and the amount of thermal expansion of the coil bobbin, the optimum temperature of the wire at the time of winding, which minimizes the decrease in the tension of the wire in the actual working condition, is obtained.
When the wire is wound, the wire provided to the coil bobbin is heated by a heater provided in the vicinity of the coil bobbin, and the wire is wound around the coil bobbin while being heated to an optimum temperature.

In the method of the present invention, when the optimum temperature of the wire at the time of winding is set, the tension of the wire exceeds the elastic limit of the coil bobbin when the temperature is lower than the actual operating state, and there is a possibility that the coil bobbin may be deformed or broken. Therefore, the optimal temperature is
After the deflection yoke is manufactured, when it is at room temperature, the tension applied to each part of the coil bobbin by the wire is not more than the upper limit temperature at which plastic deformation of the coil bobbin does not occur. Further, in a preferred embodiment of the method of the present invention, while winding the wire rod heated to the optimum temperature around the coil bobbin,
Air is blown onto the coil bobbin to cool it. Thereby, the coil bobbin is prevented from being heated and expanded by the heat of the wire, and the wire can be wound as calculated, that is, as set. By winding the deflection yoke by the method of the present invention, it is possible to suppress variations in various characteristics such as convergence in an actual use state.

A coil winding device according to the present invention is a coil winding device for winding a wire around a coil bobbin to produce a coil for a deflection yoke. The coil winding device is arranged near the coil bobbin and heats the wire. Type heater, a thermometer for measuring the temperature of the wire heated by the heater, and adjusting the current supplied to the heater based on the temperature of the wire obtained by the thermometer so as to heat the wire to a predetermined temperature. A temperature control device, and a cooling device that cools a coil bobbin around which the wire is being wound. At a predetermined temperature, a deflection yoke is incorporated in a CRT, and each of a wire and a coil bobbin constituting a coil of the deflection yoke in the actual operating state of the CRT. The actual operating temperature of the coil bobbin is measured, and the temperature of the coil bobbin when the wire is wound around the coil bobbin, Calculate the amount of thermal expansion of the coil bobbin due to the difference between the actual operating temperature of the coil and the actual operating temperature of the wire, and based on the thermal expansion of the coil bobbin, minimize the decrease in the tension of the wire in the actual operating state. And the optimum temperature at the time of winding the wire rod.

[0011] Preferably, the heater is a coil-type electric resistance heating type heater in which an electric resistance heating wire such as a Ni-Cr wire is wound in a coil shape, so that the wire is heated while passing through the coil of the heater. To As the thermometer, a radiation thermometer or the like that measures the temperature of the wire using thermal infrared rays or the like radiated from the wire is used rather than a thermometer that measures the temperature by directly contacting the wire. The cooling device is not limited as long as it can cool the coil bobbin, but is practically an air blow device that cools the coil bobbin by blowing air onto the coil bobbin.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment of coil winding device This embodiment is an example of an embodiment of a coil winding device according to the present invention, and FIG. 1 shows a configuration of a coil winding device of the embodiment. It is a schematic diagram. The coil winding device 30 of the present embodiment is disposed near a coil bobbin C and heats a wire L by a coil type electric resistance heating type heater 3.
2, a radiation thermometer 34 for measuring the temperature of the wire L heated by the heater 32, and a heater for heating the temperature of the wire L to a predetermined temperature based on the temperature of the wire L obtained by the thermometer 34. A temperature controller 36 for adjusting the current supplied to the coil 32, a guide 38 for guiding and winding the wire L into the coil bobbin C, and an air blowing device 40 for blowing air onto the wire L for cooling.

The predetermined temperature means that the deflection yoke is incorporated in the CRT, the actual temperature of the wire L and the coil bobbin C constituting the coil of the deflection yoke is measured in the actual state of the CRT, and the wire L is wound around the coil bobbin C. The amount of thermal expansion of the coil bobbin C caused by the difference between the temperature of the coil bobbin C at the time of winding (environmental temperature at the time of winding) and the actual temperature of the coil bobbin C is calculated. This is the optimum temperature at the time of winding of the wire, which was determined based on the thermal expansion amount so as to minimize the decrease in the tension of the wire L in the actual working state.

Embodiment of the Method of Manufacturing the Coil of the Deflection Yoke This embodiment is an example of the embodiment in which the method of manufacturing the coil of the deflection yoke according to the present invention is implemented using the above-described coil winding device 30. FIG. 2 is a flowchart showing the procedure of the method of manufacturing the coil of the deflection yoke according to the embodiment.
In the method of the present embodiment, first, in step S _1, incorporating a deflection yoke in CRT, while maintaining the CRT in a state of displaying an image (production state), the temperature of the wire and the coil bobbin stable, wire And the actual operating temperature of the coil bobbin are measured. Next, in step S _2, the temperature of the coil bobbin at the time of winding the wire to a coil bobbin of the deflection yoke (ambient temperature during winding), simulating the thermal expansion amount of the coil bobbin based on the difference in the production time of the temperature of the coil bobbin, etc. Ask for.

Next, in step S _3, the expansion amount due to a temperature difference in the production time and the time of winding of the production time of the coil bobbin obtained at a temperature in the previous wire rod, lowering of the tension of the wire does not occur in the actual operation state winding Find the optimum temperature of the wire at the time of wire drawing. By the way, when the wire is heated to the optimum temperature and wound, and when the work is completed and the temperature becomes normal temperature, the tension of the wire exceeds the elastic limit of the coil bobbin, and the coil bobbin may be deformed or broken. That is, after the deflection yoke is manufactured, the tension applied to each part of the coil bobbin when the temperature of the coil bobbin reaches room temperature may cause plastic deformation of the coil bobbin. Therefore, when determining the optimum temperature, the optimum temperature is the upper limit temperature at which the tension applied to each part of the coil bobbin by the wire does not cause plastic deformation of the coil bobbin when the deflection yoke is at room temperature. The following is assumed.

[0016] Then, in step S _4, performs winding operation of the wire. At that time, the wire L supplied to the coil bobbin C is heated by the heater 32 provided in the vicinity of the coil bobbin, the temperature is raised to the set optimum temperature, and the coil L is wound around the coil bobbin C. Further, while winding around the coil bobbin C, the airflow from the air blow device 40 is
And cool. Thereby, the coil bobbin C is heated by the heat of the wire L and is suppressed from expanding,
The wire can be wound as calculated, that is, as set.

In the method of this embodiment, when the wire is wound around the coil bobbin, the temperature of the coil bobbin and the wire is controlled so that the tension of the wire of the coil during operation is minimized, that is, the wire is previously wound. It is heated and wound around a coil bobbin. Therefore, by winding the deflection yoke by the method of the present embodiment, even in actual operation,
Since the wire of the coil is not loosened, the wire is prevented from changing from the position at the time of winding. Therefore, it is possible to prevent variations in various characteristics such as the convergence of the deflection yoke in the working state.

[0018]

According to the method of the present invention, when the wire is wound, the wire provided to the coil bobbin is heated by the heater provided in the vicinity of the coil bobbin, and the wire is wound around the coil bobbin while being heated to the optimum temperature. Accordingly, it is possible to minimize a decrease in the tension of the wire rod due to a rise in temperature during actual operation, and it is possible to prevent the occurrence of variations in various characteristics such as convergence. The device of the present invention
An optimal implementation of the method of the invention is realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a coil winding device according to an embodiment.

FIG. 2 is a flowchart illustrating a procedure of a method of manufacturing a coil of a deflection yoke according to the embodiment.

FIG. 3 is a perspective view showing a configuration of a coil bobbin of a deflection yoke.

FIG. 4 is a schematic diagram showing a configuration of a conventional winding device of a section winding method.

[Explanation of symbols]

10 Coil bobbin of deflection yoke, 12 First open end, 14 Second open end, 16 Cylindrical plastic body, 18 Claw, 20 Wire, 22 Guide , 30... Coil winding device of embodiment example, 32.
Coil type electric resistance heating type heater, 34 ... radiation thermometer,
36 temperature control device, 38 guide, 40 air blow device.

Claims (4)

[Claims] 1. A deflection yoke is incorporated in a CRT, and
The actual temperature of the wire and the coil bobbin constituting the coil of the deflection yoke is measured in the actual operating state of T, and the coil bobbin caused by the difference between the temperature of the coil bobbin when the wire is wound around the coil bobbin and the actual temperature of the coil bobbin. The amount of thermal expansion of the wire rod is calculated, and based on the actual operating temperature of the wire rod and the thermal expansion amount of the coil bobbin, the optimum temperature of the wire rod at the time of winding is determined to minimize the decrease in the tension of the wire rod in the actual operating state. A method of manufacturing a coil for a deflection yoke, wherein a wire provided to a coil bobbin is heated by a heater provided in the vicinity of the coil bobbin, and the wire is wound around the coil bobbin while being heated to an optimum temperature. 2. The method of manufacturing a coil for a deflection yoke according to claim 1, wherein air is blown onto the coil bobbin to cool the wire while the wire heated to the optimum temperature is wound around the coil bobbin. 3. A coil winding device for forming a deflection yoke coil by winding a wire around a coil bobbin, wherein the coil winding device is arranged near the coil bobbin and is heated by an electric resistance heating heater for heating the wire. A thermometer for measuring the temperature of the wire, a temperature controller for adjusting a current supplied to the heater based on the temperature of the wire obtained by the thermometer so as to heat the wire to a predetermined temperature, and a wire wound around the wire. A cooling device that cools the coil bobbin being started, and a predetermined temperature is adjusted by incorporating the deflection yoke into the CRT.
The actual operating temperature of the wire and the coil bobbin constituting the coil of the deflection yoke in the actual operating state is measured, and the coil bobbin caused by the difference between the coil bobbin temperature when the wire is wound around the coil bobbin and the actual operating temperature of the coil bobbin. Calculates the amount of thermal expansion, and based on the actual operating temperature of the wire and the thermal expansion of the coil bobbin, determines the optimal temperature at the time of winding the wire in such a way as to minimize the decrease in the tension of the wire in the actual operating state. A coil winding device, characterized in that: 4. The coil winding device according to claim 3, wherein the cooling device is an air blow device that blows air to the coil bobbin to cool the coil bobbin.