JPH0488613A - Bobbin for transformer - Google Patents

Abstract

PURPOSE:To slacken the wire between a terminal and a winding barrel part by a method wherein the wire, which has been wound on the winding barrel part of a bobbin for transformer, is engaged to a wire-passing piece, it is connected to the terminal for winding connection, and the wire-passing piece is cut by bending or bent. CONSTITUTION:After the starting-end part 38a of a wiring 38 has been connected to the terminal 26 to be used for start of winding using a wrapping joint method, the wiring 38 is led out to the outer circumferential surface part of a winding barrel part 12 from the lower part of a wire lead-out groove 30 through wire-guide protruding pieces 32 and 34. Then, the winding of the wire 38 on the winding barrel part 12 is started, a winding-finished wire 38b is connected to a terminal 28, to be used for the finish of winding, ranging to a wire-passing piece. In the above-mentioned condition, the wire 38b connected to the terminal 28 is brought into a state of tension. By bending and cutting the wire-passing piece 36 in the direction where the tensile stress generated on the wire 38b will not be increased further in the above-mentioned state, the wire 38 is brought into a relaxed state.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an improvement in a winding frame for a transformer.

[Prior Art and Problems to be Solved by the Invention] FIG. 6 is a perspective view of a main part of a conventional transformer winding frame having terminals for connecting windings. In such a conventional transformer winding frame a, when winding is performed, an automatic winding machine is generally used to wind the electric wire around the winding trunk to form the winding 111c, and then wind the electric wire d after winding. For example, it was directly connected to the connection terminal e by wrapping, soldering, etc. FIG. 6 shows the wrapped state.

However, when an automatic winding machine is used, the electric wire d connected to the terminal e after winding is normally in a tensioned state as shown in FIG.

Therefore, due to the expansion or contraction of the electric wire e and the winding frame a due to heat generation of the winding C due to use as a transformer, changes in outside temperature, etc., or the terminal e may be damaged by, for example, the plug blade f.
If the plug blade f deforms when inserted into or removed from an outlet or the like, there is a risk that the electric wire d may be cut.

The present invention has been made in view of the above-mentioned problems existing in the prior art, and its purpose is to reduce the concentration change of the electric wire after winding around the winding body of the transformer winding frame. It is an object of the present invention to provide a winding frame for a transformer that can easily prevent cutting caused by the like.

[Means for Solving the Problems 1 In order to achieve the above object, 1 the transformer winding frame of the present invention has the following features:
A winding frame for a transformer having a terminal for connecting a winding, in which a breakable or bendable transit piece on which the wire that has been wound around the winding body can be hung and passed through is used to connect a portion of the winding to the winding body. When connecting the finished wire to the terminal, the wire connected to the front north terminal via the transit piece should be placed at a position away from the shortest path that the wire should pass, so that the wire is not loosened due to breakage or bending of the transit piece. It is set up so that it faces the space it allows.

[Operation] The electric wire that has been wound around the winding body of the transformer winding frame is hung on the relay piece, passed through the wire, and then connected to the winding connection terminal. The relay piece is provided at a position away from the shortest path that the wire should take when connecting the wire that has finished winding around the winding body to the terminal, and the wire is not bent or bent. Since the electric wire is provided so as to face a space that allows the electric wire to be relaxed, by breaking or bending the electric wire in the direction in which the electric wire is relaxed, the electric wire can be relaxed without fear of being cut.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 5.

1 to 4 are perspective views of essential parts of a winding frame for a transformer according to an embodiment of the present invention. However, Figures 1, 3 and 4
The figure is a perspective view of the plug tooth from above and behind, and FIG. 2 is a perspective view of the plug tooth from above and front.

The transformer winding frame 10 can be formed from an insulating synthetic resin such as polyethylene terephthalate.

12 is @ body part, 14 is front flange part, 16 is rear flange part,
The front flange 14 and the rear flange 16 project outward at the front and rear of the winding trunk 12, respectively.

18 and 19 are plug teeth, 20 and 22, front flange 1
The upper part of No. 4 also has a smooth plug tooth (a retaining part).

The bases 24 and 25 of the plug teeth 18 and 19 are formed in an oval shape, as shown by hidden lines in FIG. The plug tooth holding parts 20 and 221 are embedded and held with the upper parts protruding as the terminals 26 and 28.

26 is a terminal for the start of winding, and 281 is a terminal for the end of winding. In addition, the groove 304 provided between the plug tooth holding parts 20 and 22, the groove for the wire bow 1, and the terminal 26 for starting winding are also provided above and in front of the plug tooth holding part 20. Each of the protruding pieces 32 and 34 is a wire guiding protrusion.

36 is a transit piece. This transit piece 361, the winding drum section 12
The electric wire that has been wound can be routed through the 1/1 threaded loop to be connected to the terminal 28 for the end of winding, and can be easily twisted by hand or by machine. It is arranged in a breakable manner. Via piece 36
To make it easy to bend, for example, the material,
This is possible by appropriately selecting the shape, the cross-sectional area of the portion to be cut or bent, etc.

Further, this transit piece 36 is provided to protrude upward from the upper corner portion of the front flange portion 14 with a gap between it and the plug tooth holding portion 22 in which the winding end terminal 28 is provided. Therefore, the position of the relay piece 36 is deviated from the shortest path that the wire should take when connecting the wire that has finished winding to the winding trunk 12 to the end-of-winding terminal 28.
The space created by the interval between the wire 36 and the wire 36 allows the electric wire 38b connected to the winding end terminal 28 via the wire 36 to be relaxed by breaking or bending the wire 36.

To manufacture a transformer by winding the transformer winding frame 10, first, as shown in FIGS. After connecting to the terminal 26 by wrapping, the electric wire 38 is led out from the lower part of the wire pulling groove 30 to the outer circumferential surface of the winding drum 12 as shown by the arrow through the wire guide protrusions 32 and 34.

Next, winding of the electric wire 38 around the winding trunk 12 is started as shown by arrow A in FIG.
As shown by arrow B, it is hooked onto the via piece 36 and connected to the end-of-winding terminal 28 via the via piece 36 by wrapping. 40 is a winding. In this state, the electric wire 38b connected to the end-of-winding terminal 28 after winding is in a tensioned state.

In this state, the wire 38 is cut as shown in FIG. Be in a relaxed state.

Note that after the electric wire 38 is connected to the terminals 26 and 28 by wrapping, the connecting portion is further soldered.

FIG. 5 is a perspective view of a main part of a transformer winding frame 10 according to another embodiment.

In this embodiment, the wire 38b that has finished winding is relaxed by bending the route piece 42 toward the terminal 28 for almost the end of winding. In this case, a material is used for the transit piece 42 that can maintain its bent shape without being broken.

Note that the terminal does not necessarily need to be integral with the plug teeth, and the shape of the via piece may be, for example, a plate shape instead of a rod shape. Further, for example, a notch may be provided in the front flange, and a passage piece may be provided at the entrance of the notch. In this case, the space created by the notch allows the electric wire connected to the end-of-winding terminal via the via piece to relax by breaking or bending the via piece.

[Effects of the Invention] In the transformer winding frame of the present invention, the electric wire that has been wound around the winding body of the transformer winding frame is hung on the relay piece, passed through the wire, and then connected to the winding connection terminal. Then, by breaking or bending the passing piece, the electric wire between the terminal and the winding trunk can be relaxed, and the electric wire can be caused by expansion or contraction of the electric wire and the winding frame due to temperature changes. For example, when the terminal is integrated with a plug blade, it is possible to prevent the plug blade from being deformed and cut when inserted into or removed from an outlet or the like.

[Brief explanation of drawings]

1 to 4 are perspective views of main parts of a transformer winding frame according to one embodiment of the present invention, and FIG. 5 is a main part perspective view of a transformer winding frame according to another embodiment. FIG. 6 is a perspective view of the main parts of a conventional transformer winding frame. In the drawing, 10 is a transformer winding frame, 12 is a winding trunk, 28 is a terminal, 36 and 42 are transit pieces, and 38b is an electric wire. Figure 3

Claims (1)

[Scope of Claims] A winding frame for a transformer having terminals for connecting windings, comprising a breakable or bendable transit piece on which a wire that has been wound can be passed through the winding trunk. When connecting the electric wire that has finished winding around the winding drum to the terminal, the electric wire connected to the terminal via the relay piece is placed at a position away from the shortest path that the electric wire should take, and the wire is bent or folded. A winding frame for a transformer, characterized in that it is provided so as to face a space that allows relaxation.