JP2001085242A - Connection terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an insulated electric wire to be markedly enhanced in mechanical strength such as tensile strength to a connection terminal by a method wherein a tin (solder) pool is provided to a part of a metal plated board, and the tin pool is previously filled up with tin (solder). SOLUTION: A metal-plated board 2 is a brass board plated with tin or solder, and the metal-plated board 2 is formed into a cylindrical connection terminal 1. A pool 3 as deep as 0.2 to 0.5 mm corresponding to the size of the connection terminal 1 is provided to a pressure part of the connection terminal 1 nearly surrounding it. At the same time, the pool 3 is previously filled up with tin or solder 8. Moreover, the cylindrical connection terminal 1 can be varied in dimensions corresponding to its use, and the pool 3 is provided not only to a part of the connection terminal 1 surrounding it but also to a part partially surrounding it or to several parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal / vertical coil constituting a coil or a deflection yoke formed by winding a self-fusing insulated wire having a plurality of insulated copper wires such as a magnet wire. Related to the connection terminal used to connect the terminal lead wire of the deflection coil to an external circuit, etc., and in particular, a deflection coil using a self-fusing insulated wire obtained by bundling and twisting a plurality of micro-insulated wires in parallel. The present invention relates to a connection terminal suitable for use in the present invention.

[0002]

2. Description of the Related Art Conventionally, a self-fusing insulated wire formed by bundling or twisting a plurality of fine insulated wires in parallel has been used for a horizontal deflection coil and a vertical deflection coil constituting a coil and a deflection yoke. I have. These coils are wound with a self-fusing insulated wire using a dedicated mold, and after winding, the self-fusing insulated wires are welded to each other by applying current and heating from the terminal lead wire of the coil. Is formed in a predetermined shape so that the coil does not lose its shape even if it is removed from the mold. The electric heating for forming the coil is shown in FIG.
As shown in FIG. 1, for example, a terminal portion of a coil is inserted into a cylindrical connection terminal 1A made of a metal plating plate 2 in which a brass plate is tin-plated, and electrodes (not shown) are applied from above and below the connection terminal 1A. This is performed while applying power at a predetermined voltage while applying pressure. At this time, the coil terminal part is initially
As shown in the figure, the insulating film 5 is in a state as it is.
However, when current is applied at the same time as pressurization, the insulating film on the coil terminal portion is burned or melted due to Joule heat of the connection terminal 1A, and the copper wire 6 and the connection terminal 1A come into contact with each other to energize the self-fusing insulated wire 4. Will be done. Then, the heat generated based on the resistance of the self-fusing insulated wires 4 heats and melts the insulating film 5 of the coil, so that the self-fusing insulated wires 4 are fixed to each other. Therefore, if the coil is removed from the mold after cooling, a coil having a predetermined shape can be obtained.

[0003]

The connection terminal 1
When a predetermined voltage is applied while applying pressure from above and below the electrode A, when the insulating film 5 of the self-fusing insulated wire 4 is burned or melted, the connection terminal 1A and the copper wire 6 come into contact. Electric power is supplied to the self-fusing insulated wire 4. At this time, the portion where the connection terminal 1A and the copper wire 6 are in direct contact is
As shown in (b), the tin-copper alloy layer 7 is formed, and the connection terminal 1A and the copper wire 6 are welded. But,
The tin-copper alloy layer 7 was not formed in the portion between the copper wires 6, and the copper wire 6 and the copper wire 6 were merely in contact with each other. For this reason, the mechanical strength such as the pulling of the copper wire 6 with respect to the connection terminal 1A is weak, and when the connection terminal 1A is connected to the circuit side via a connector or the like, the copper wire 6 is likely to come off due to vibration or the like. There was a disadvantage that lacked reliability. Therefore, it was not practical to use such a connection terminal 1A for connection between the coil and the circuit side. Therefore, in order to connect the coil and the circuit side, means for cutting and discarding the connection terminal 1A, peeling off the insulating film 5 on the coil terminal lead wire portion again, and connecting to the circuit side by soldering have been taken. However, in order to connect the coil and the circuit side by such means, a plurality of work steps are required, and the connection terminal 1
Since A is disposable, there is a problem that the obtained coil is expensive.

[0004] Therefore, an object of the present invention is suitable for energizing and heating a coil formed by winding a self-fusing insulated wire. Even when the coil is used for connection via a connector, the mechanical strength of the coil terminal lead wire is high. It is another object of the present invention to provide a connection terminal capable of obtaining an inexpensive coil with improved connection reliability.

[0005]

According to an aspect of the present invention,
A connection terminal made of a metal plating plate 2 used for electrical connection of the coil formed by winding the self-fusing insulated wire 4 having a plurality of insulated copper wires 6 with the plurality of copper wires 6. A connection terminal characterized in that a pool (3) of tin (solder) 8 is provided in a part of the metal plating plate 2 and the pool (3) is filled with tin (solder) 8 in advance. provide.

In the connection terminal according to the aspect of the present invention, the tin (solder) 8 previously filled in the pool portion 3 is heated and melted by energizing heating and flows into the details between the plurality of copper wires 6. As a result, the tin-copper alloy layer 7 is formed over the entirety of the connection terminal 1, the copper wire 6, and the copper wire 6, and the connection terminal 1, the copper wire 6, and the entire copper wire 6 are welded to each other. The mechanical strength of the insulated insulated wire 4 at the time of connection is greatly increased, and the reliability of the connection is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited by this.

First Embodiment FIG. 1 is an explanatory view showing a configuration of a connection terminal according to a first embodiment of the present invention, in which the characteristic portions of the present invention are exaggerated. FIG. 2A is a perspective view of the same, and FIG. 2B is a cross-sectional view of a main part of FIG. In the figure, reference numeral 1 denotes a connection terminal formed by forming a metal plating plate 2 obtained by applying a tin or solder plating to a brass plate into a cylindrical shape.
Of the pressurized portion 3 has a depth (0.2 mm to 0.5 mm) corresponding to the size of the connection terminal 1 over substantially the entire circumference.
The pool 3 is provided with tin or solder 8.
Is satisfied in advance. The specific dimensions of the cylindrical connection terminal 1 of the embodiment are 5 mm to 8 mm in length, the outer diameter of both ends is 3 mm, and the outer diameter of the pool 3 is 4 mm, but the pool 3 is exaggerated. . In addition, the dimensions of the cylindrical connection terminal 1 can be variously changed according to the application. It goes without saying that it is good.

Second Embodiment FIG. 2 is an explanatory view showing a configuration of a connection terminal according to a second embodiment of the present invention. FIG. 2A is a perspective view of the connection terminal, and FIG. It is principal part sectional drawing of FIG. In the figure,
Reference numeral 1 denotes a connection terminal formed of a metal plating plate 2 in which a brass plate is plated with tin or solder, and is formed by folding the long metal plating plate 2 into a U-shape. A portion 3 having a depth of 0.5 mm to 1 mm is provided in a portion to be pressed at a substantially middle portion of the upper portion of the metal plating plate 2 bent in a U-shape. Is filled with tin or solder 8 in advance. Specific dimensions of the U-shaped connection terminal 1 of the embodiment are 5 mm to 8 mm in length, 3 mm to 5 mm in width, and the tip of the pool portion 3 is 0.5 mm to 1 mm from the surface of the metal plating plate 2. It sticks out.
In addition, it goes without saying that the pool portion 3 may be provided on both upper and lower surfaces of the bent metal plating plate 2, and a plurality of the pool portions may be provided on each surface.

The energization heating using the connection terminal 1 configured as described above is performed, for example, as follows. First,
When the terminal portion of the coil is inserted into the connection terminal 1 and energized while pressurizing the pool portion 3 so as to be sandwiched between upper and lower electrodes (not shown), the insulation film of the self-fusing insulated wire 4 is heated by the Joule heat of the connection terminal 1. The connection terminal 1A and the copper wire 6 come into contact with each other and the self-fusing insulated wire 4 is energized. At the same time, the tin (solder) 8 previously filled in the pool portion 3 is heated and melted by the Joule heat of the connection terminal 1 and uniformly flows into the plurality of copper wires 6 at the coil terminal portion, so that the tin-copper alloy layer 7 is formed. Is formed. (FIG. 3
(See (a).) In this manner, the tin-copper alloy layer 7 is formed on the entire connection terminal 1A and the coil terminal portion, and the connection terminal 1, the copper wire 6, and the copper wires 6 are joined to each other. 1 and the self-fusing insulated wire 4 greatly improved in mechanical strength in connection, the pull-out of the copper wire 6 by pulling was prevented, and connection reliability was improved. Further, since the connection terminal 1 used for the electric heating can be used as it is for connection to the external circuit side, a plurality of steps conventionally required for connection between the coil and the external circuit side are not required, and an inexpensive coil is used. was gotten.

[0011]

According to the present invention, the connection terminal for connecting the connection terminal to the self-fusing insulated wire by conducting and heating by a simple means of providing a pool of tin or solder at a part of the connection terminal. The mechanical strength such as the pulling of the insulated wire can be greatly increased, and the connection reliability can be greatly improved. Further, this connection terminal can be used as it is for connection to the external circuit side via a connector or the like, and a plurality of steps for connection conventionally required are unnecessary, and an inexpensive coil can be obtained. The practical effect is large.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a connection terminal according to a first embodiment of the present invention, wherein FIG. 1 (a) is a perspective view thereof, and FIG. 1 (b) is a sectional view of a main part of FIG. 1 (a). It is.

FIGS. 2A and 2B are explanatory views showing a configuration of a connection terminal according to a second embodiment of the present invention, wherein FIG. 2A is a perspective view thereof, and FIG. It is.

FIGS. 3A and 3B are explanatory diagrams showing a welded state of a connection terminal and a copper wire. FIG. 3A shows a case where there is a pool, and FIG. It is principal part sectional drawing.

FIG. 4 is a sectional view showing a configuration of a self-fusing insulated wire.

FIG. 5 is an explanatory view showing a conventional example of a connection terminal, and FIG.
1 is a perspective view of a cylindrical connection terminal, and FIG. 2B is a perspective view of a flat connection terminal.

[Explanation of symbols]

 1, 1A Connection terminal 2 Metal plating plate 3 Reservoir 4 Self-fusing insulated wire 5 Insulation coating 6 Copper wire 7 Alloy layer 8 Tin

Claims (1)

[Claims] 1. A metal plating plate 2 used for electrical connection of a coil formed by winding a self-fusing insulated wire 4 having a plurality of insulated copper wires 6 with the plurality of copper wires 6. A connection terminal made of tin (solder) 8 on a part of the metal plating plate 2.
And the reservoir 3 is preliminarily provided with tin (solder).
8. A connection terminal characterized by satisfying (8).