JPH041691Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electromagnetic coil formed by fixing a terminal seat made of an insulating material to which a terminal is attached to the outer peripheral surface of a bare coil.

[Technical background of the invention]

A conventional electromagnetic coil is shown in FIGS. 23 and 24. In the figure, reference numeral 2 denotes a bare coil whose inner peripheral surface is covered with insulating paper 1, and this coil 2 is formed by winding a coil bare wire without using a flanged coil bobbin. Since the end face of such a bare coil 2 is exposed,
In the varnish treatment for the bare coil 2, the varnish is easily impregnated into the inner part of the bare coil 2 from the exposed end face. Therefore, since the heat dissipation characteristics through the varnish are improved, it has long life characteristics. 3 is a terminal seat body fixed to the outer peripheral surface of the bare coil 2 via a fixing tape (not shown); 4
is a terminal seat insulating plate between the bare coil 2 and the terminal seat main body 3. Note that the terminal seat main body 3 and the terminal seat insulating plate 4 form a terminal seat. A terminal 5 is attached to the terminal seat body 3, and this terminal 5
A lead wire from the elementary coil 2 is connected to the .

In this type of electromagnetic coil, it is necessary to insulate between the lead wire from the elementary coil 2 and the end face of the coil.
Therefore, in the past, the lead wire from the element coil 2 was covered with an insulating tube 6.

[Problems with background technology]

However, since the insulating tube 6 is used, the conventional electromagnetic coil has a disadvantage of having a large number of parts and a complicated structure. At the same time, during assembly, it is necessary to cut the insulating tube 6 to match the length of the leader wire from the bare coil 2, and to pass the tube 6 through the leader wire, which reduces assembly work efficiency. There are bad flaws.

[Purpose of invention]

Therefore, an object of the present invention is to provide an electromagnetic coil that can realize insulation between the end face of the coil and the lead wire from the element coil with a simple structure, and can improve the ease of assembly.

[Summary of the idea]

The present invention provides a terminal seat made of an insulating material with a terminal attached to the outer surface of the winding layer at the end of the winding, which forms the outer circumferential surface of a coil formed by winding a coil wire without using a flanged coil bobbin. In the electromagnetic coil in which a winding layer is fixed, the terminal seat connects both end surfaces of the elementary coil, in which the starting layer and the ending layer of the elementary coil appear on the outer surface, from the starting layer to the ending layer. It is characterized in that it has an end cover section that covers each of the winding layers to form a substantially U-shape, and that a lead wire from the element coil connected to the terminal is arranged along the outside of the end cover section. .

According to this electromagnetic coil, the end face cover portion, which is integrally provided with the terminal seat made of an insulating material, is interposed between the end face of the coil and the lead wire from the bare coil, so insulation between these was previously required. This can be achieved without using an insulating tube or increasing the number of parts, resulting in a simple electromagnetic coil structure, and since the terminal seat is approximately U-shaped, the coil lead wire can be drawn out from either side of both end faces of the coil. It can be used in any case. Since no insulating tube is used, it is possible to omit the troublesome work of cutting the tube and wiring the wire to the tube. You can assemble it by aligning it and connecting it to the terminal. Therefore, assembly work efficiency can be improved.

[Example of idea]

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

In the figure, reference numeral 12 indicates a bare coil formed by winding coil wires in an aligned manner without using a flanged coil bobbin.
At the same time, the final winding layer forming the outer peripheral surface of the coil 12 is protected by being covered with an upper wrapping paper (not shown).

A terminal seat 13 made of an insulating material such as pressboard is fixed to the outer peripheral surface of the coil 12. The terminal seat 13 is made of a pressboard plate provided with a plurality of perforations 14 to 17 serving as folding lines and a slit-shaped terminal mounting hole 18 at one end, as shown in FIG. It is folded and assembled as shown in FIG. 5 through the bending process shown in the figure. By this assembly, the terminal seat 1
3 is integrally provided with end face cover parts 13b and 13c on both sides of an inner wall part 13a that is in contact with the outer peripheral surface of the winding of the elementary coil 12, and one end face cover part 13c.
The outer wall portion 13d is integrally connected to the outer wall portion 13d and overlaps the outer surface of the inner wall portion 13a, and is formed into a substantially U-shape. Since it has a pair of end cover parts 13b and 13c in this way, the element coil 1
It is possible to handle the case where the coil lead wire is drawn out from either side of both end surfaces where the start winding layer and the end winding layer forming the winding outer periphery of No. 2 are exposed on the outside. Moreover, the width A of the inner wall portion 13a is equal to the width B of the elementary coil 12.
It is determined that the relationship A≦B is satisfied. Further, a terminal 19 is attached to the terminal attachment hole 18. This terminal 19 is formed by inserting one piece of the U-shaped terminal into the terminal mounting hole 18 from the inner wall 13a side, and then bending the one piece so as to contact the outer surface of the outer wall 13d. It is attached to the terminal seat 13. Note that at least one terminal 19 is sufficient.

The terminal seat 13 has its inner wall portion 13a in contact with the outer circumferential surface of the coil 12,
It is attached to the bare coil 12, and its fixation is achieved by providing an adhesive tape 20 across the terminal seat 13 and the insulating paper 11. In addition, this terminal seat 1
3 is fixed by a lead wire from the bare coil 12, for example, in this embodiment, the low voltage side coil winding start lead wire 12a,
The terminal 19 is oriented so that the terminal 19 is located on the lead-out side of the coil winding end lead-out wire 12b on the high-voltage side.

By fixing the terminal seat 13 to the outer circumferential surface of the winding of the bare coil 12, one end face cover portion 13b covers the coil end face of the bare coil 12 on the side from which the lead wires 12a, 12b are drawn out, that is, the winding start layer. and an end winding layer forming the outer periphery of the winding is provided to cover the end face exposed on the outside, and the other end face cover part 13
c is provided to cover the other coil end face of the elementary coil 12. Moreover, in this embodiment, due to the dimensional relationship of A≦B, the pair of end cover portions 13b, 13c
are arranged in a substantially V-shape so as to gradually move away from the end face of the element coil 12 toward the winding frame 11 side,
In this state, it is fixed with adhesive tape 20.

The coil winding start lead wire 12a runs along the outside of the end cover portion 13b, and is connected to the terminal 19 by being wound around it. Further, the coil winding end drawn-out end 12b crosses the side end surface of the terminal seat 13 and is wound around and connected to another terminal 19.

Insulation between the end face of the elementary coil 12 and the coil winding start lead wire 12a in the electromagnetic coil having the above structure is provided by the end face cover part 13 integrally provided with the terminal seat 13.
This can be achieved by b. Moreover, in this embodiment, since the end cover portion 13b has a structure that expands outward, a larger insulation distance can be obtained. Therefore, since the insulating tube that was conventionally necessary can be omitted, all the disadvantages caused by using the insulating tube can be eliminated.

In the second embodiment of the present invention shown in FIGS. 7 to 10, the bare coil 12 has a lead wire 12c (made of stranded wire) from its intermediate tap, and this lead wire 12c is An application example is shown in which the winding start lead wire 12a is drawn out from the end face of the coil opposite to the side from which it is drawn out. In this second embodiment, as shown in FIG. 9, a pressboard plate serving as a terminal seat 13 has a plurality of holes 21 extending on both sides of the perforation 16, and a plurality of holes 21 extending on both sides of the perforation 17 as a border. A terminal seat 13 is used which is assembled by bending holes 22 provided in each hole. Therefore, the terminal seat 13 has a groove 21' formed by a hole 21 in the end cover portion 13c. After passing through the groove 21', the lead wire 12c passes through the end cover portion 1.
3c, and is hooked onto the edge of the hole 22 and along the outer wall 13d, and is connected to the terminal 19 for the intermediate tap by being wound around it. Note that the parts other than the structure described above are the same as in the first embodiment.

Therefore, also in this second embodiment, the intended purpose of the present invention can be achieved by the end cover portions 13b and 13c. Moreover, the middle part of the leader line 12c is connected to the hole 22.
Since this wire 12c can be temporarily fixed by hooking it on the edge of the lead wire 12c, the workability of winding the lead wire 12c around the terminal 19 can be improved.

In the third embodiment of the present invention shown in FIGS. 11 and 12, a cutout groove 23 aligned with the intermediate tap terminal 19 is formed in the end cover portion 13b, and the element coil 12 is inserted from this groove 23. The structure is the same as that of the first embodiment, except for the structure in which the leader wire 12c is drawn out from the intermediate tap, and this wire 12c is connected to the terminal 19 for the intermediate tap along the outside of the end cover portion 13b. be. In addition, the notch groove 23
Of course, it is formed by cutting to the drawing position of the drawing line 12c.

Therefore, even in this third embodiment, the intended purpose of the present invention can be achieved by the end cover portion 13b.
Furthermore, since the lead wire 12c is positioned at the intermediate tap terminal 19 by engagement with the cutout groove 23, the workability of connecting the lead wire 12c to the terminal 19 can be improved.

In the fourth embodiment of the present invention shown in FIGS. 13 and 14, the end cover portion 13b is provided with a notch 24 forming a corner aligned with the terminal 19 for the intermediate tap. The lead wire 12c from the intermediate tap of the element coil 12 is pulled out from the intermediate tap 24 by engaging with the corner, and the wire 12c is drawn out along the outside of the end cover portion 13b to connect the terminal 1 for the intermediate tap.
The parts other than the structure connected to 9 have the same structure as the first embodiment.

Therefore, the end cover portion 13b of this fourth embodiment can also achieve the intended purpose of the present invention.
Moreover, since the lead wire 12c is positioned at the intermediate tap terminal 19 by the corner of the notch 24,
The workability of connecting this lead wire 12c to the terminal 19 can be improved.

In the fifth embodiment of the present invention shown in FIGS. 15 to 18, a plurality of holes 21 are provided in the pressboard plate serving as the terminal seat 13, as shown in FIG. A plurality of holes 22 are provided on both sides of the perforation 16, a notch 24 is provided to form a corner in the portion that will become the end cover portion 13b, and a terminal mounting hole 18 is provided in the portion that will become the outer wall portion 13d. A terminal seat 13 is used, which is assembled by bending this board.
Then, the lead wire 12c from the intermediate tap of the bare coil 12 is passed through the groove 21' formed by the hole 21, and is hooked onto the edge of the hole 22.
d, wrap it around the intermediate tap terminal 19 and connect it. Note that the parts other than the structure described above are the same as in the first embodiment.

Therefore, in this fifth embodiment as well, the intended purpose of the present invention can be achieved by the end cover portions 13b and 13c. At the same time, since the terminal seat 13 has the groove 21' and the notch 24, the element coil 1
The leader line 12c can be drawn out from any end surface of 2.

In the sixth embodiment of the present invention shown in FIGS. 19 to 22, the pressboard plate serving as the terminal seat 13 has a plurality of holes 21 on both sides of the perforation 16 as shown in FIG. A plurality of holes 22 are provided on both sides of the perforation 17, a notch 24 is provided to form a corner in the portion that will become the end cover portion 13b, and a terminal mounting hole 18 is provided in the portion that will become the outer wall portion 13d. The locking groove 25 is opposite to the
Terminal seat 1 obtained by cutting out and bending this board
3 is used. Then, the lead wire 12c from the intermediate tap of the element coil 12 is passed through the groove 21' formed by the hole 21, for example, and is hooked onto the edge of the hole 22, along the outer wall 13d, and a terminal for the intermediate tap is inserted. 19 and connected. Further, the locking groove 25 is set to have substantially the same width as the terminal 19, and the rising base of the terminal 19 is exactly fitted into this groove. Note that the parts other than the structure described above are the same as in the above embodiment.

Therefore, the end cover portions 13b and 13c can also achieve the intended purpose of the present invention in this sixth embodiment. At the same time, since the terminal seat 13 has the groove 21' and the notch 24, the element coil 1
The leader line 12c can be drawn out from any end surface of 2. Moreover, since the locking groove 25 is provided in the terminal seat 13 and the terminal 19 is exactly fitted into the locking groove 25, the terminal
9 can be prevented from wobbling, the workability of winding each lead wire 12a, 12b, 12c around each terminal 19 can be further improved, and the insulation distance between the terminals 19 after winding can be ensured. By the way, terminal mounting hole 1
In a structure in which the terminal 19 is supported by only the terminal 8, the terminal mounting hole 18 is formed to be large in consideration of the insertion of the terminal 19, and therefore the terminal 19 cannot be properly mounted. However, side-to-side wobbling may occur. This may impair the workability of winding the leader wire or make it impossible to ensure a sufficient insulation distance between the terminals.

Each of the above embodiments is configured as described above, but
When implementing this invention, unless it is contrary to the gist of the invention, terminal seats, bare coils, coil lead wires, terminals,
The specific structure, shape, position, material, etc. of the end cover portion etc. are not limited to the above embodiments.
Of course, it can be configured and implemented in various ways.

[Effect of idea]

As explained above, the present invention is an insulator in which terminals are attached to the outer surface of the winding layer at the end of the winding, which forms the outer circumferential surface of the coil, which is formed by winding a coil wire without using a flanged coil bobbin. In an electromagnetic coil in which a terminal seat made of material is fixed, the terminal seat connects both end surfaces of the bare coil, in which the starting winding layer and the winding end winding layer of the bare coil appear on the outer surface, to the outer surface of the bare coil. It has an end cover section covering each layer from the winding layer to the end winding layer to form a substantially U-shape, and the lead wire from the element coil connected to the terminal is placed along the outside of the end surface cover section. Due to the structure, the end face cover part integrally provided with the terminal seat provides insulation measures between the end face and the lead wire from the raw coil that crosses the end face of the raw coil. Since this can be realized by using the above-mentioned insulation tube, the insulating tube that was conventionally required for the above-mentioned insulation measures can be omitted, the structure can be simplified, and the assembly work efficiency can be improved compared to the conventional method. It has excellent practical effects, such as being able to handle cases where it can be pulled out from either side of the surface.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a side view, and FIGS. 3 to 5 are perspective views showing the terminal base in the order of assembly.
FIG. 6 is a perspective view of the terminal mounting section. 7 to 10 show a second embodiment of the present invention, FIG. 7 is a perspective view, FIG. 8 is a side view, FIG. 9 is a perspective view of the terminal seat before assembly, and FIG. FIG. 3 is a perspective view of the terminal seat after assembly. Figures 11 and 12 show a third embodiment of the present invention, with Figure 11 being a perspective view and Figure 12 being a perspective view;
Figure 2 is a side view. 13 and 14 show a fourth embodiment of the present invention, FIG. 13 is a perspective view,
FIG. 14 is a side view. Figures 15 to 18 show a fifth embodiment of the present invention, Figure 15 is a perspective view, Figure 16 is a side view, Figure 17 is a perspective view of the terminal seat before assembly, and Figure 18 is assembled. It is a perspective view of a rear terminal seat. 19 to 22 show a sixth embodiment of the present invention, FIG. 19 is a side view, FIG. 20 is a perspective view of the terminal seat before assembly, and FIG. 21 is a perspective view of the terminal seat after assembly. , FIG. 22 is a perspective view of the terminal mounting portion. 23 and 24 show a conventional example, with FIG. 23 being a perspective view and FIG. 24 being a side view. 12... Elementary coil, 12a, 12b, 12c...
...Leader wire, 13...Terminal seat, 13b, 13c...
End cover part, 19...terminal.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal is attached to the outer surface of the end winding layer that forms the outer circumferential surface of a coil formed by winding a coil wire without using a flanged coil bobbin. In the electromagnetic coil to which a terminal seat made of an insulating material is fixed, the terminal seat connects both end surfaces of the bare coil with the starting winding layer and the winding end winding layer of the bare coil appearing on the outer surface. It has an end cover section that covers each layer from the first winding layer to the last winding layer to form a substantially U-shape, and the lead wire from the bare coil connected to the terminal is connected along the outside of the end surface cover section. An electromagnetic coil characterized by a (2) The electromagnetic coil as set forth in claim (1) of the utility model registration, wherein the end face cover portion is gradually separated from the end face of the elemental coil as it goes inside the elemental coil.