JPH1050217A - Deflection yoke device and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make metallic joint reliably and speedily by interposing brazing material in the vicinity of a terminal and a coated electric wire end. SOLUTION: A coil 24 is made of a large number of coated wires (litz wires) 23. To connect them, they are aligned in a row with the coat left as it is. Furthermore, they are aligned in two rows to be brought into contact with a clad terminal 16. The clad terminal 16 is made of a copper plate clad with a hard-solder containing phosphorus. The litz wires 23 arranged as described above are inserted into the terminal 16 processed as shown in the drawing and combined. Next, they are squeezed between electrodes 31, 32 of an electric- heat-pressing device, heated using a power supply 33, and pressed. With this operation, the phosphorus-containing hard-solder is heated, the coat on the litz wires is melted, and carbonized. Continued heating and pressing expel the carbonized material, and melt the hard-solder. The litz wires 23 from which coating is removed are connected to the terminal 16.

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 deflection yoke of a cathode ray tube image display (CRT) used for a television receiver, a personal computer, and the like, and a deflection yoke. The present invention relates to a method of manufacturing a deflection yoke having a simple coil connection and a deflection yoke.

[0002]

2. Description of the Related Art A deflection yoke device is a component mounted on a CRT for moving an electron beam of the CRT right and left and up and down to display a screen. The deflection yoke device is moved up and down with a horizontal deflection coil for moving the electron beam left and right. And a vertical deflection coil.

[0003] The deflection yoke is obtained by winding a coated copper lead wire around a deflection yoke frame a number of times and placing it near the electron gun of a CRT. FIG. 7 is a perspective view showing the appearance of a conventional deflection yoke having such an operation. In the drawing, reference numeral 1 denotes a molded component in which a horizontal deflection coil 2 is disposed, and is made of a resin material. Reference numeral 3 denotes a core, on which a vertical deflection coil 4 is wound. Reference numeral 5 denotes a terminal plate on which the terminals 6 are arranged. In the configuration as described above, the terminal portions of the coil wires 2 and 4 of the deflection yoke are led to the terminal plate 5 and connected by the terminals 6.

[0004] With the recent improvement in the quality of television broadcasting and the increase in the amount of information in computer equipment, it has become necessary to apply a much higher frequency current to the coil of the deflection yoke and move the position of the electron beam at a higher speed. Is coming out. The high-frequency current has a characteristic of flowing on the surface of the current. In order to flow high-frequency current with low resistance, it is necessary to increase the surface area of the wire, so a large number of thin wires with a small diameter are bundled, and in some cases, a wire called a litz wire that twists those wires is used Have been. Specifically, a thin wire having a diameter of 0.12 to 0.20 mm is used as 21 to 50 single wires or stranded wires.

[0005] Since the litz wire is covered with a covering material, the terminal portion is connected to a terminal, so that the terminal portion is immersed in a chemical, the covering material is chemically dissolved and peeled off, and the Cu material of the core material is removed.
The exposed litz wire is wrapped around the metal terminal and soldered. The steps of peeling the coating material and soldering the terminals are performed manually. More specifically, in this case, the coating material has high heat resistance of OBS-1EIW: and a chemical is also used by heating. Immediately after the coating material has peeled off, remove the chemicals with warm water or the like. The stripped Cu wire is wrapped around the metal terminal to be connected in triplicate.
Subsequently, a flux is applied to the connection portion of the litz wire which has been twisted, and the solder is applied by heating with a soldering iron or the like.

[0006]

In the above prior art, the connection between the litz wire and the terminal is made manually. Therefore, there was a problem that productivity was poor and cost reduction was difficult.
In order to perform soldering by hand, a solder with a low melting point and excellent handling properties must be used. However, the melting point of the solder is as low as 180 ° C. in the solid phase temperature, and it is inferior in heat resistance to a cathode ray tube. There has been a problem that the horizontal sensitivity cannot be improved by reducing the size of the deflection yoke component and increasing the output of the display device.

A first object of the present invention is to provide a method for securely connecting the terminal of the deflection coil of the deflection yoke to the terminal in a shorter time and a deflection yoke joined by the method.

A second object of the present invention is to improve the heat resistance by joining the joint between the deflection coil end of the deflection yoke and the terminal with a brazing material having higher heat resistance. It is an object of the present invention to provide a method of manufacturing a deflection yoke with high output and a deflection yoke manufactured by the method.

[0009]

According to the present invention, there is provided a cathode ray tube which is located near an electron gun.
In a method of manufacturing a deflection yoke device including a plurality of deflection coils for controlling a direction of an electron beam, an end of a plurality of covered electric wires forming the deflection coil, and a metal terminal for flowing a current to the deflection coil. In the vicinity of the terminal and the end of the covered electric wire, a brazing material is interposed, and at least a part of the contact surface between the terminal and the covered electric wire is heated and pressurized to carbonize the coating of the end of the covered electric wire. And melting the brazing material to join the terminal and the end of the covered electric wire.

In the above, the brazing material is P-Cu, P
-It is preferable to use a Cu-Ag alloy or a silver solder.

Further, it is preferable that the brazing material is clad on the joint surface of the terminal.

[0012] It is preferable that the plurality of covered electric wires are arranged so as to be arranged in one row or two rows before joining, and thereafter, the terminal and the end portion of the covered electric wire are joined.

[0013] In addition, after the plurality of covered electric wires are arranged so as to be arranged in one row or two rows before joining, the terminal may be deformed so as to be wound around the end of the covered electric wire and joined. After the brazing material is arranged between the plurality of covered electric wires, the electric wires may be heated and pressed to join them.

According to the invention of the present application, in a deflection yoke device which is located near an electron gun of a cathode ray tube and has a plurality of deflection coils for controlling the direction of an electron beam, a plurality of covered electric wires forming the deflection coils are provided. The end and a metal terminal for flowing a current through the deflection coil are made of Cu containing Cu, Cu-
Provided is a deflection yoke device joined by any one of an Ag alloy and a silver brazing material.

[0015] The coating material of the plurality of coated coil materials used for the deflection yoke is polyester wire (PEW), polyesterimide (EIW), polyesterimide enamel wire (AMW), and polyamideimide wire (AIW) having a heat resistance of 130 ° C or higher. ) And a polyimide enameled wire (IMW).

A description will now be given of how the configuration of the present invention is adopted.

Welding, brazing, and the like are considered as connection prostheses for improving heat resistance. For the welding, a TIG (tungsten inert gas) welding method, a laser welding, or the like is conceivable. However, each was examined, but the coating material of the litz wire could not be successfully removed.

On the other hand, for brazing, an attempt was made to braze with a micro torch capable of working fine parts. This method was able to remove the outer coating material, but was insufficient in removing the central coating material. Met. In addition, the heating range is widened, and the thermal damage to the insulating coating is prolonged, which requires reprocessing of the insulating coating.

That is, neither the welding method nor the brazing method were sufficient connection methods.

Therefore, the present inventors have tried to examine the brazing method by various experiments. The goal in this case is to remove the covering material of the litz wire and to completely join the core material and the metal terminal of the litz wire from which the covering material has been removed with the brazing material.

For this purpose, if there is a brazing material near the joint that melts similarly when the coating material is heated and carbonized, the coating material is removed and wetted and reacted with the exposed core Cu wire. It was thought that metallic joining was achieved. The type of brazing material could be joined with the solder used in the conventional joining, but further studies were also made on the type of brazing material. In addition, it was found that it was possible to wet the connection part and braze it successfully. EIW for coating type and brazing material
650 ° C. to 750 for (polyester imide wire)
A brazing material that melts at 0 ° C has been found to be suitable.

It has also been found that, in order to carry out this joining method, the carbonization range of the coating material is shortened by using an electric resistance heating / pressing device.

That is, according to the present invention, a brazing material adjusted to the carbonization temperature (or peeling temperature) of the insulating coating is placed at the connection portion of the metal terminal, and the metallic joining is performed simultaneously with the peeling of the coating.

By joining using such a brazing material, it is possible to provide a method that has high joining strength and high heat resistance and can be joined together, and a deflection yoke device used for a CRT.

The reason why a resistance welding machine is used as a joining device is as follows.
Heating and pressurization can be performed simultaneously, and bonding can be performed in a short time. And since most of them are joined in the atmosphere, the shorter the joining time, the less the reaction with oxygen, so that a good joint can be obtained. Further, the resistance welding machine preferably employs a two-stage heating and pressurizing method in order to further enhance the reliability of the joint.

That is, the first step is heating and pressurizing for carbonizing the insulating coating and melting the brazing material containing P.
Subsequently, the coating material carbonized in the second stage is discharged to the outside of the joining surface, and at the same time, the P-containing brazing material is sufficiently wetted to the litz core wire and the terminal, and the excess brazing material is discharged to obtain a metallic joint. Things.

The reason why the brazing material containing P is used as the brazing material is that P (phosphorus) is used to join the coated electric wire and the terminal, thereby removing the oxide film of the material to be joined and improving the wettability of the solder. This is because it has an effect of removing the carbonized insulating coating material remaining on the surface of the Cu wire, which is the core wire of the litz wire, from the Cu wire surface.

In particular, by the action of removing the carbonized insulating coating, a good metallic joint can be formed at the joint. Further, since the flux which is usually required for brazing can be made unnecessary, there is no need to perform cleaning after joining, and it is also possible to eliminate the conventional corrosion of the material to be joined due to the remaining flux. The brazing material used at this time must be selected according to the type of insulating coating. This is because, even if the coating has a high carbonization temperature, even if the brazing filler metal with a low melting point is clad, the brazing filler metal is melted before the coating is carbonized and discharged due to pressurization, and it can serve as a metallic joint. Absent. Rather, excessive reaction with the terminal is promoted, and the bent portion may be broken.

On the other hand, if a brazing material having a high melting point is used, good joining cannot be expected without melting. At the time of joining, it is necessary to join under the condition that the brazing material is melted at the same time as the insulating coating of the insulated coating wire is carbonized or after the insulating coating is carbonized. That is, a brazing material having a melting temperature equal to or higher than the carbonization temperature of the insulating coating is interposed in the bonding surface, and the coating of the litz wire is carbonized by heating and pressurizing the bonding portion, thereby melting the brazing material. A metallic joint can be created at the joint. For insulation coating of litz wire, polyester wire (PEW), polyester imide (EIW), polyester imide enamel wire (AMW), polyamide imide wire (AIW), polyimide enamel wire (IMW), etc. with heat resistance of 130 ° C or higher , Cu-7% P, Cu-15% Ag-
A brazing filler metal containing P such as 5% P is applied. The carbonization temperature of the above-mentioned insulating coating material is about 500 ° C. to 620 ° C., but the temperature at which carbides are easily peeled is a somewhat higher temperature. Therefore, a brazing material of about 700 ° C. to 800 ° C., which melts at a higher melting temperature, is effective.

On the other hand, various combinations of the clad material of the P-containing brazing material can be considered. As the terminal material, copper and copper alloys such as copper, brass and nickel silver, furthermore, soft copper and stainless steel can be applied. In the cladding method, a thin plate of brazing material containing P is bonded to the above-described terminal, and hot or cold processing is performed to integrate the brazing material and the terminal. The ratio of the brazing material thickness to the total thickness at that time is approximately 5 to 10%.
% Is good.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) Hereinafter, a deflection yoke device used for a CRT according to the present invention will be described. FIG. 1 is a perspective view showing the configuration of the deflection yoke device. In the figure, reference numeral 11 denotes a molded component on which a horizontal deflection coil 12 is arranged, which is made of a resin material. Reference numeral 13 denotes a core, and the core 13 includes a vertical deflection coil 1.
4 are wound. Reference numeral 15 denotes a terminal plate on which terminals 16 are arranged. In the configuration as described above, the terminal portions of the coil wires 12 and 14 of the deflection yoke are guided to the terminal plate 15 and connected by the terminals 16.

FIGS. 2 and 3 show basic examples of coil wires and terminals which are connection points of the deflection yoke.

In FIG. 2, (a) shows a flat plate of the terminal 16, and the terminal 16 is formed by cladding 21 copper plates with 22 brazing material containing P. (B) shows 23 coil-covered wires (Litz wire), and in order to connect them,
(C) As in 23, they are arranged in substantially one line without stripping. (D) shows a combination of 23 coil wires, which are arranged in substantially one row without stripping, and is combined with 16 clad terminals shown in (a).

In FIG. 3A, the coil 24 is composed of a multi-coil covered wire (Litz wire) like 23, and 23 is a stranded wire. In order to connect them, (b) is arranged substantially in a line without stripping.

In (c), the 23 coil wires arranged in substantially one row without stripping the coating are arranged in substantially two rows so as to contact the 16 clad terminals shown in (d).
(D) shows the litz wire 2 arranged substantially in two rows in (c).
3 is injected into a clad terminal processed as shown in FIG. 16 and connected in combination.

FIG. 4 shows a method of connecting with a heating and pressurizing device. That is, 23 litz wires are wrapped in 16 clad terminals as shown in the figure. In order to connect this, it is sandwiched between the upper electrode 31 and the lower electrode 32, and is pressurized by the heat generated by the power supply of 33 and the pressing force of 34. By this connection operation, the brazing material containing P is heated, and the coating material of the 23 litz wire is melted and carbonized by the heat, and the above-mentioned carbide is discharged by the subsequent heating and pressurization, and the brazing material is melted and coated. The litz wire from which the wire has been peeled off and the terminal are joined.

The 23 litz wires and 16 terminals joined as described above are fixed to 15 terminal boards as shown in FIG.

(Embodiment 2) FIG. 6 shows a state before the joining in which a material to be joined is arranged in an energizing heating and pressing device in a post-step of the deflection yoke in another application example. (A) shows a state where 23 litz wires are wound around and joined to 16 clad terminals. In (b), since all of the 23 litz wires do not contact the 16 clad terminals, 43 brazing material containing P is arranged at the center and heated by a power supply of 46 between the upper electrode of 44 and the lower electrode of 45. Then, a state where pressure is applied by the pressing force of 47 is shown.

The litz wire has a diameter of φ0.12 to φ0.20,
21 to 50 pieces were applied.

(Comparative Example) The coating material of the litz wire was removed with a chemical, and a copper plate was used for the terminal.
n was soldered in the same shape as in Example 1.

The characteristics of the joints produced in Example 1 and Comparative Example, which were joined in the above steps, were evaluated.

High temperature (100 ° C. and 250 ° C.) tensile tests of the joints showed significant differences in properties. That is, in the solder joint of the comparative example, the litz wire came off the terminal at 100 ° C., and at 250 ° C., the litz wire came off the terminal with a weaker force. On the other hand, the litz wire did not come off even at 100 ° C. and 250 ° C., and the litz wire itself was cut in the vicinity of the terminal joint at the junction fabricated in the example of the present invention. That is, it became clear that the joint between the litz wire and the terminal was very firmly joined. It was found that the deflection yoke device of the present invention produced in this way had excellent image clarity and heat resistance as a deflection yoke device.

[0043]

As described above, the deflection yoke device according to the present invention exhibits high heat resistance and high performance characteristics by achieving metallic bonding with the terminal without removing the covering material of the lissa wire. can do. Further, it is not necessary to remove the coating material, and an automatic line can be realized by applying the clad terminal, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing Embodiment 1 of a deflection yoke device according to the present invention.

FIG. 2 is a perspective view showing a basic example of a clad terminal and a coil wire which are connection points of a deflection yoke.

FIG. 3 is a perspective view showing a basic example of a coil wire and a clad terminal which are connection points of a deflection yoke.

FIG. 4 is a cross-sectional view illustrating a method of connecting with a heating and pressurizing device.

FIG. 5 is an enlarged perspective view showing a state where the litz wire and the terminal in FIG. 1 are joined.

FIG. 6 shows another application example of the present invention.

FIG. 7 is a perspective view showing the appearance of a conventional deflection yoke device.

[Explanation of symbols]

1, 11: molded part, 2, 12: horizontal deflection coil, 3,
13 core, 4, 14 vertical deflection coil, 5, 15 terminal plate, 6 terminal, 16 clad terminal, 21 copper plate, 2
2, 43: brazing material, 23: litz wire, 24: coil, 3
1, 41 ... upper electrode, 32, 42 ... lower electrode, 33, 46 ...
Power supply, 34, 47 ... Pressure.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuru Ura, 1st Kitano, Makino, Mizusawa-shi, Iwate Prefecture Inside Hitachi Media Electronics Co., Ltd. Inside Media Electronics (72) Inventor Yoshio Sato 3300 Hayano, Mobara-shi, Chiba Electronic Device Division, Hitachi, Ltd.

Claims (7)

[Claims] 1. A method of manufacturing a deflection yoke device, comprising: a plurality of deflection coils for controlling a direction of an electron beam, which is located near an electron gun of a cathode ray tube, wherein a plurality of ends of a plurality of covered electric wires forming the deflection coils are provided. And a metal terminal for flowing an electric current to the deflection coil. A brazing material is interposed between the terminal and the end of the covered electric wire, and at least a part of a contact surface between the terminal and the covered electric wire is electrically heated. And pressurizing to carbonize the coating of the coated wire end, melt the brazing material, and join the terminal and the coated wire end. 2. The method according to claim 1, wherein the brazing material is P-
A method of manufacturing a deflection yoke device, comprising a Cu, P-Cu-Ag alloy or a silver braze. 3. The method according to claim 1, wherein the brazing material is P-
A method of manufacturing a deflection yoke device, comprising a Cu, P-Cu-Ag alloy, a silver solder, and clad on a joint surface of the terminal. 4. The method according to claim 1, wherein the plurality of insulated wires are lined up in a row or two rows before joining, and then the terminal and the end of the insulated wire are joined. Manufacturing method of the deflection yoke device. 5. The method according to claim 4, wherein after arranging the plurality of insulated wires so as to be arranged in one row or two rows before joining, the terminals are joined by deforming ends of the insulated wires. A method for manufacturing a deflection yoke device. 6. The method of manufacturing a deflection yoke device according to claim 1, wherein the brazing material is disposed between the plurality of covered electric wires, and thereafter, the members are joined by applying current and heating and pressing. 7. A deflection yoke device which is located near an electron gun of a cathode ray tube and has a plurality of deflection coils for controlling the direction of an electron beam, comprising: an end portion of a plurality of covered electric wires forming the deflection coil; A metal terminal for supplying current to the deflection coil is a C terminal including P
A deflection yoke device which is joined by any one of u, Cu-Ag alloy, and silver brazing material.