JPS6314486B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer winding frame, in which it is easy to attach a plastic-covered lead wire, and furthermore, the connection of the plastic-covered lead wire to the coil end and other lead wires is easy. The plastic-coated lead wire is characterized by excellent tensile strength.

Conventionally, the method for connecting and fixing lead wires to a transformer is to connect the lead wire to the end of the coil, bend the connection part downward, place cardboard (press board, etc.) on top of it, and then tighten it with insulating tape. A method is to configure the lead wire so that it cannot be pulled out, or a method is to use a terminal board in which a plastic covered lead wire is welded to a plastic substrate having the width between the top and bottom flanges of the transformer winding frame (for example, Japanese Patent Publication No. 53-27450). )
etc., but there is a drawback that it requires time and effort in manufacturing the transformer.

The present invention eliminates the above-mentioned drawbacks and is further characterized in that a large number of plastic-covered lead wires can be drawn out easily.

An embodiment of the present invention will be described in detail below with reference to the drawings.

The drawing shows a transformer with concentrically wound coils.

That is, it is composed of an inner coil bobbin a, an outer coil bobbin b, terminal plates c and cl, and a cover d for the connection part.

First, let's talk about the inner coil bobbin a.
The inner coil bobbin a is composed of upper and lower flanges 1 and 2 and a winding body part 30, and one of the flanges, that is, the lower flanges 2
is made somewhat smaller than the upper flange 1, and is configured to be fitted into the winding body 9 of the outer coil bobbin b, which will be described later.Furthermore, on one side of the upper flange 1, an appropriate number of holes are provided for pulling out the coil end. A notch 3 is provided.
Furthermore, bent pieces 4 are provided at the four corners of the upper surface at appropriate intervals from the upper surface, and locking holes 5 are provided in each of the bent pieces 4. In the figure, reference numeral 6 indicates upright walls that stand up on both sides of the core fitting portion.

Next, talking about the outer coil bobbin b, the outer coil bobbin b is composed of upper and lower flanges 7 and 8 and a winding body part 9, and the upper surface of the upper flanges 7 facing the notch 3 of the inner coil bobbin a is provided with an appropriate interval. An appropriate number of protrusions 10 are provided.

It is preferable that the protruding piece 10 is configured such that one end thereof is bent outward as shown in the third figure.
Furthermore, the lower collar 8 at a position facing the protruding piece 10 has an appropriate number of notches 11 for pulling out the coil end.
Furthermore, bent pieces 4 and locking holes 5 having the same structure as the bent pieces 4 and locking holes 5 provided at the four corners of the upper surface of the inner coil bobbin a are provided at the four corners of the lower surface of the outer coil bobbin b. It is being

Further, an appropriate number of notches 12 and an upright wall 13 are provided on the opposite side of the upper collar 7 from the projecting piece 10.
Furthermore, a receiving plate 14 is provided inside the lower flange 8 of the winding body 9 on which the lower flange 2 of the inner coil bobbin a is appropriately placed.

Next, terminal plates c and cl will be described.

The terminal plates c and cl have the same structure, and the above-mentioned inner coil bobbin a is installed on the upper and lower ends of the terminal plates c and cl, respectively.
and a bent piece 4 provided on the outer coil bobbin b.
An engaging piece 15 is provided with a length that reaches the inner coil bobbin a and the outer coil bobbin b. A projection 16 is provided. Further, its upper and lower surfaces and outer surfaces serve as plastic-coated lead wire attachment parts.

That is, lead wire insertion holes 17 and bending fixing pieces 18 are provided on the outer surface and the upper and lower surfaces so as to be vertically opposed to each other at appropriate intervals.

To be more specific, as shown in FIG. 3, each lead wire insertion hole 17 has an outer portion having approximately the same diameter as the plastic-coated lead wire 19, and an inner portion having the diameter of a bare wire portion from which the plastic coating has been peeled off. They are configured to have a very small diameter and are provided at appropriate intervals.

Next, bent fixing pieces 18 are provided on the upper and lower surfaces of the outer coil bobbin b in the mounting direction corresponding to the lead wire insertion holes 17, respectively.

The bent fixing piece 18 is inserted into the lead wire insertion hole 17.
A receiving portion 20 for the plastic-covered lead wire is formed with a downward radius so that the plastic-covered lead wire 19, which is inserted into the plastic-covered lead wire in an upright state, can be bent and locked.

In the present invention having the above structure, the inner coil 21 is wound around the inner coil bobbin a, and the end of the inner coil 21 and other lead wires 22 are drawn out from the cut 3. Outer coil 2 is attached to the other outer coil bobbin b.
3 is wound, the end of the outer coil 23 and other lead wires 24 are pulled out from the notch 11, and the inner coil bobbin a is fitted into the outer coil bobbin b to form an integral structure.

On the other hand, plastic-coated lead wires 19 are inserted into the lead insertion holes 17 of the terminal plates c and cl, respectively.
It is bent and fixed to the receiving part 20 of the bent fixing piece 18. Then, it is set from both sides of the outer coil bobbin b and the inner coil bobbin a, which are integrally constructed.

As a result, the engaging pieces 1 at both upper ends of the terminal plates c and cl
The locking protrusions 16 of 5 engage with the locking holes 5 of the bent piece 4 provided at the four corners of the upper surface of the inner coil bobbin a,
The locking protrusions 16 of the engaging pieces 15 at both lower ends of the terminal plates c and cl engage with the locking holes 5 of the bent pieces a provided at the four corners of the lower surface of the outer coil bobbin b, and the outer coil bobbin b and the inner coil bobbin a and the terminal plates c and cl are integrally constructed, and the plastic covered lead wire 19
are bent and raised by the protruding pieces 10 of the outer coil bobbin b.

Next, the end of the inner coil pulled out from the notch 3 of the inner coil bobbin a and other lead wires 2
2 may be twisted onto the bare wire portion protruding downward from the lead wire insertion hole 17 through between the protruding pieces 10 of the outer coil bobbin b and between the bent fixing pieces 18 of the terminal plates c and cl, and then soldered.

Further, the ends of the outer coil drawn out from the notch 11 of the outer coil bobbin b and the other lead wires 24 may be connected to the plastic-coated lead wire 19 in the same manner. In the case of the embodiment shown in the drawings, a raised portion 25 is formed at the center of the terminal plates c and cl.

The raised portion 25 is connected to the plastic covered lead wire 19.
When inserted into the lead wire insertion hole 17, the bare wire naturally protrudes outward, making it easy to twist the ends of the coils and the other lead wires 22, 24, and also It is possible to collectively braze the twisted parts at a point farther away from the plates c and cl.

Then, connect the brazed connection part to the lead wire insertion hole 1.
7 and cover the outer and upper and lower surfaces of the terminal plates c and cl with covers d.

As described above, according to the present invention, it is easy to attach the plastic-covered lead wire, and furthermore, the connection with the coil end and other lead wires is easy, and the plastic-covered lead wire is bent in two places into a crank shape. It has the effect of being bendable and having excellent tensile strength.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway plan view of a transformer, FIG. 2 is a longitudinal cross-sectional view of the main parts of a transformer, and FIG. It is an exploded view. 10... Projection piece, 17... Lead wire insertion hole, 18
...Bending fixing piece, 19...Plastic covered lead wire, a...Inner coil bobbin, b...Outer coil bobbin, c, cl...Terminal plate, d...Cover.

Claims (1)

[Claims] 1. A terminal board with lead wire insertion holes provided at appropriate intervals on the outer surface, and a bent fixing piece for a plastic-covered lead wire provided on the top surface in correspondence with the lead wire insertion holes; a coil bobbin provided with protrusions that engage and bend and erect plastic-coated lead wires passed through the bending fixing pieces on the flanges facing the bending fixing pieces of the terminal plate;
A transformer winding frame comprising a cover that covers the outer surface and upper and lower surfaces of a terminal board.