JPS6031213A - Transformer - Google Patents

Abstract

PURPOSE:To attach connecting terminals to the outside overlapped parts of overlapped masks and avoid the short circuit between a coil and the connecting terminals by a method wherein the coil and a leakage core are simultaneously insulated and bound together by insulating members made of folded insulation sheets. CONSTITUTION:Folds are prepared to insulation sheets and a mask 7 touches the periphery of a coil 1. From this condition, the coil 1 is wrapped by masks 7-11 so that the wires of the coil 1 are bundled. A leakage core 2 is wrapped cylindrically by masks 8, 11, 12, 13. The insulating members 3, 4 formed like this are bound by a tape. A separating piece 18 is fold into an acute angle against the mask 12. The top and bottom ends of the leakage core 2 are held by the separating pieces 18. When the transformer is assembled, a center leg 15 can get contact with an L-shape path earth plate 25 by holding the path earth plate 25 with the leakage core 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention This invention relates to a transformer.Technical background of the invention and its problems 7 In a transformer, when two coils are assembled on an iron core, there is a Conventionally, the two coils and the leakage core are each individually wrapped in an insulating sheet or the like and bound together with tape or the like. Therefore, the number of man-hours required for insulation work increases, and the amount of insulation material used also increases.

Further, a connection terminal for connecting the coil to an external circuit is held on the terminal block. This has the disadvantage that the number of parts and the number of assembly steps further increase.

Purpose of the Invention The present invention has been made in view of the above points, and an object thereof is to simplify the insulation structure and further simplify the mounting structure of the connection terminal.

SUMMARY OF THE INVENTION This invention forms an insulating member having a plurality of covering surfaces, an overlapping portion overlapping at least a portion of the covering surfaces, and a partitioning surface by bending a single insulating sheet. The coil and the cage core are covered and bound together by a partitioning surface with a partitioning surface between them, and a connecting terminal is attached to the overlapping part overlapping the masking surface to prevent a short circuit between the connecting terminal and the coil. It is constructed so that the terminal block is omitted and the number of assembly steps can be further reduced.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. 1 to 5. A coil 1 and a pair of left and right glued cage iron cores 2 are provided on both sides of one end surface of the coil 1. Next, a pair of left and right insulating members 3.4 are provided. These insulating members 3゜4 are bilaterally symmetrical, and are formed by bending insulating sheets 5 having the same external shape along folding lines 6 shown as dotted lines in FIG. This allows it to be used for left and right.

The number of fold lines 6 is 6, which allows a plurality of covered surfaces 7° 8.
9, 10, 11, 12.13 are formed. The covered surface 9 that contacts the inner circumferential surface of the coil 1 is the E iron core 14 which is the main iron core.
It is formed short to match the height of the central leg 15 of. Further, the upper part of the masking surface IO is formed wide, and four recesses 16 are formed in the upper part of the masking surface 11, and two upper and lower separation holes 18 are formed by forming a cut 17 in the masking surface 13. It is formed. The legs 20 of the connection terminal 19 are inserted into the attachment hole 16 from the outside and bent at the back side.

A holding piece 22 for holding down the lead wire 21 of the coil 1 is formed on these connection terminals 19 .

In such a configuration, the insulating sheet 5 is creased in advance, and from the state where the covering surface 7 is brought into contact with the outer peripheral surface of the coil 1, the covering surface 7 is folded so as to bundle the windings of the coil 1.
, 8, 9.10. surrounded by l 1, and further covered by mask 8,
11, 12. 13, the leakage core 2 is made into a cylindrical shape of 1u.
ll, and the insulating member 3 formed by bending in this way,
4 are bound together with tape 23. Further, the separation pieces 18 are bent at an acute angle with respect to the covering surface 12, and the upper and lower ends of the leakage core 2 are pressed by these separation pieces 18. In this state, the masking surface 8 also serves as a partitioning surface 24 that insulates and partitions the coil 1 and leakage core 2. In addition, by sandwiching the L-shaped bus ground plate 25 between the leakage core 2 during assembly, when the coil 1 and leakage core 2 are assembled together with other coils 26 into the E-shaped core 14, the center leg 15 can be connected to the pass ground Fi25. can be brought into contact with.

This makes it extremely easy to assemble the leakage core 2 and the E-shaped core 14 while connecting them.

The coil 1 and the leakage core 2 are not insulated individually, but are simultaneously insulated by the insulating member 3 or 4 and bundled together, so less insulating material is required and the assembly work is easy with less man-hours. I can go there.

Further, the lead wire 21 of the coil 1 is drawn out to the outside and soldered to the connection terminal 19 in a stable state in which it is held by the holding piece 22. The connection terminal I9 is connected to the covering surface 11 overlapping the covering surface 7, that is, the overlapping portion 11. a, and its legs 20 are attached to the masked surface 7
Since it is insulated by the coil 1, a short circuit with the coil 1 is prevented.

There is no need to insulate the tip of the lead wire 21 with a tube or tape, and the terminal block can be omitted, further reducing the number of assembly steps.

In addition, as mentioned above, although the upper part of the mask 10 is wide,
A part 10a of the wide part of the masking surface 10 is bent toward the masking surface 10 side as shown in FIG. A short circuit between 20 and the coil 1 may be prevented by the cover 10. In this case, the covering surface 7 at the end can be omitted.

Furthermore, although it has been described that the connection terminals are formed by bending the connection sheet, the way in which the insulation sheet 1- is folded may be either a spiral shape or a crank shape. Although this embodiment has a corner shape, it has a spiral shape. Further, the first covering surface of the insulation sheath 1- may be started from any side of the coil 1 and the leakage core 2.

Effects of the Invention Since the present invention is constructed as described above, the coil and the cage core can be integrally bound together while simultaneously insulating them using the insulating member formed by bending the insulating sheet.
and 9, the insulation work can be easily done with less man-hours, and the connection terminal can be attached to the overlapping part on the outside of the overlapped covers to prevent short circuit between the connection terminal and the coil. This has the advantage that the terminal block can be omitted and the assembly work can be easily performed with fewer man-hours.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a plan view of an insulating sheet, FIG. 4 is a perspective view of an insulating member, and FIG. FIG. 6 is a partially enlarged cross-sectional view showing the connection terminal mounting structure, and FIG. 6 is a partially perspective view showing a modified example of the insulating member. 1... Coil, 2... Leakage core, 3, 4...
Insulating member, 5... Insulating sheet, 7-13... Covered surface, 1
0a to Ila...Overlapping part, 14...E type core (main core), 16...Mounting hole, 19...Connection terminal, 24/Partition surface Applicant: Tokyo Denki Shiki Kaisha], 33 times 1 )j)j)JO,,33■Fig.

Claims (1)

[Claims] 1. A coil installed in the main core by bending a single insulating sheet, a partition surface inserted between the cage core, and one side of the coil installed in the main core. A plurality of covering surfaces surrounding the wires so as to bundle the wires, a plurality of covering surfaces covering the leakage iron core in a cylindrical shape on one side of the coil, and an overlapping portion located on at least a part of the surface of the covering surfaces and overlapping each other are formed. 1. A transformer characterized in that an insulating member is provided, and the coil and the leakage core are integrally bound by the insulating member. 2. By bending a single insulating sheet, a partition surface is inserted between the coil installed in the main core and the leakage core, and one side of the coil is surrounded so as to bundle the windings of this coil. An insulating member is provided in which a plurality of covering surfaces, a plurality of covering surfaces covering the leakage iron core in a cylindrical shape on one side of the coil, and an overlapping portion located on at least a part of the surface of the covering surfaces and overlapping each other are formed, 1. A first herrance characterized in that the coil and the leakage iron core are integrally bound by an insulating member, and a mounting hole for mounting a connecting terminal is formed in the overlapping part.