JP2001291620A - Arc welding terminal and welding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the arc welding terminal of a small transformer, capable of protecting its molded holder against deformation or burning due to welding heat. SOLUTION: A projection, a recessed part, or a thickened part is provided to the welding terminal 1 of a small transformer for the formation of a stepped part 2, a linear welding member 3 as a transformer winding terminal is wound on the top side of the stepped part 2, and an arc welding operation is carried out separated from the molded resin holder 4 by a certain gap, so that a melt zone is restrained from coming into direct contact with the molded resin holder 4. Therefore, a resin molded holder is given no heat directly and is protected against deformation or burning, and an arc welding terminal 1 ensuring high welding strength can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a welded terminal for arc welding used in electric and electronic equipment such as a transformer, and a method for welding the same.

[0002]

2. Description of the Related Art Conventionally, a terminal to be welded of a transformer is formed by winding a linear welding member of a transformer winding terminal around a terminal having a constant width protruding from a mold resin forming a bobbin of the transformer and joining the terminals by arc welding. However, the terminal to be welded is melted by arc welding and is welded to the linear welding member. However, since the heat capacity of a small transformer is small, when the terminal is melted and reaches the holding portion, the holding portion is heated and deformed or burnt.

FIG. 5 shows a state in which a linear welding member at the end of a transformer winding is wound around a welded terminal for arc welding of a conventional transformer. The terminal to be welded has a holding portion formed of mold resin and held. The terminal to be welded is formed of copper or a copper alloy such as phosphor bronze, and is heated and melted by the arc with the copper or copper alloy of the linear welding member.

FIG. 6 shows a state in which a linear welding member of a transformer winding terminal is wound around a terminal to be welded of a conventional transformer and is welded. Since the linear welding member is close to the mold resin, the terminal to be welded is melted. At this time, the molten terminal to be welded comes into contact with the molding resin, and has a disadvantage that the molding resin is deformed or burnt by the heat of fusion.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and has as its object to provide a stepped terminal to be welded in a small transformer so that a linear welding member can be directly molded resin. By adopting a structure that does not make contact, it is possible to provide a welding method that can ensure the strength of welding without directly applying heat to the mold resin.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the invention according to the present invention is characterized in that a step is provided in a terminal to be welded, and a portion around which a linear welding member is wound is located on the tip side from the step, thereby reducing the mold. In the case where the linear welding member is wound around the terminal to be welded and arc welding is performed while maintaining a constant distance from the resin portion holding portion, the configuration is such that the molten portion does not directly contact the insulating resin portion.

Generally, a linear welding member of a transformer winding terminal is wound around a terminal to be welded, and arc welding is performed from the tip of the welding terminal. Therefore, as in the claimed invention,
When a linear welding member is wound around the distal end of the terminal to be welded, the molten metal from the distal end of the terminal to be welded covers the linear welding member, and the linear welding member is moved toward the mold resin holding portion of the terminal to be welded. The metal that is held at a certain distance and melted by arc welding can reach the linear welding member without reaching the mold resin.

Since the arc welding point between the terminal to be welded and the member to be welded has a certain distance from the molding resin, the heat generated by the arc welding can be reduced, and the molding resin can be prevented from being thermally deformed or burnt. .

There is no displacement of the linear welding member during the arc welding, the linear welding member is held at a fixed distance during the arc welding, does not contact the mold resin, and the arc welding does not contact the molten metal with the mold resin holding portion. It can be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal to be welded and a method for welding the same according to the present invention will be described below with reference to the accompanying drawings. In the description of the drawings, the same members will be denoted by the same reference symbols, without redundant description.

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of a terminal 1 to be welded by arc welding. This welded terminal 1 is provided with a step 2, a linear welding material 3 is wound around the tip end side of the welded terminal 1, the metal of the welded terminal 1 is melted from the tip end by arc welding, and the metal is a linear welding member. 3 shows the shape of the arc welded portion 6 of the terminal 1 to be welded formed.

FIG. 2 shows an embodiment of a small transformer according to the present invention. FIG. 2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. 2 (c) is a plan view. Side is 10mm
The following is a small transformer. The bobbin 9 of the transformer has a terminal to be welded integrally formed of a mold resin such as a phenol resin.

FIG. 3 shows details of the terminal 1 to be welded.
The terminal 1 to be welded of the transformer 7 is a bobbin 9 of the transformer winding 8.
The terminal 1 to be welded is formed to be wider on the mold resin holding portion 4 side than the tip portion 5 side, and the linear welding member 3 is connected to the terminal 1 to be welded.
Can be easily wound around the step 2 on the side of the front end 5.

The same effect can be obtained even if the terminal 1 to be welded is provided with a projection which does not reach the mold resin holding portion as the step 2.
The linear welding member 3 can be held at a certain distance from the mold resin holding portion 4 and away from the heat of melting the terminal 1 to be welded by arc welding.

FIG. 4 shows a terminal to be welded showing an embodiment having a recess according to the present invention. When a linear welding member is wound, the linear welding member 3 wound around the terminal 1 is molded without displacement. It is possible to keep a certain distance from the resin holding part 4, and it is possible to avoid deformation and burning of the mold resin holding part 4 due to heat.

Accordingly, the linear welded member 3 of the transformer winding is wound around the welded terminal 1 of the transformer having the step 2 and arc-welded as in the first aspect of the present invention, so that the mold of the welded terminal 1 is formed. Arc welding is possible without deforming or burning out the resin holding portion 4.

Further, according to the invention as set forth in claim 2, in the invention as set forth in claim 1, the step 2 is provided at the welded terminal of the transformer, so that the linear welding member 3 which is a transformer winding is provided.
The arc welded portion 6 can be formed with a predetermined distance from the mold resin holding portion 4 and no displacement.

If the terminal 1 to be welded on the mold resin holding portion 4 side is made thick as shown in FIG. 3, the holding strength is increased, and the effect of dissipating the heat of melting is also preferable.

[0019]

According to the present invention, it is possible to fix the winding position of the linear welding member at the end of the transformer winding by making a step on the terminal to be welded of the small transformer by increasing a projection, a concave portion, and a width, and further performing arc welding. It is possible to maintain a constant interval from the melting heat of the metal by arc welding, and to avoid deformation and burning of the mold resin.

[0020]

[Brief description of the drawings]

FIG. 1 is an arc welding shape showing an embodiment of the present invention.

FIG. 2 is a diagram showing an embodiment of the small transformer of the present invention.

FIG. 3 is a view showing an embodiment of a terminal to be welded of the present invention.

FIG. 4 is a terminal to be welded showing an embodiment having a concave portion according to the present invention.

FIG. 5 is a diagram in which a linear welding member is wound around a conventional terminal to be welded.

FIG. 6 shows a welding shape using a conventional terminal to be welded.

[Explanation of symbols]

 Terminal to be welded Step linear welding member Mold resin holding part Tip arc welding part Transformer winding Bobbin

Claims (2)

[Claims] 1. A terminal to be welded held by a mold resin for connecting a winding of a small transformer having a side of 10 mm or less, wherein a linear welding member forming a transformer winding is wound around the terminal to be welded. In a welded terminal to be joined by arc welding, a step is provided at a root of the terminal to be welded, and a linear welding member is wound around an upper end of the step and welded. 2. An arc welding terminal according to claim 1, wherein a terminal width of the terminal to be welded is made larger or smaller than a part to be wound by a linear welding member.