JPH0451443Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to electromagnets, and particularly relates to improvements in the connecting portion between the coil wire wound on the bobbin and the lead wire. Related to effective use in solenoids, etc. used in

[Conventional technology]

The fifth electromagnet used in solenoids, etc.
Something like the one shown in the figure. That is,
This electromagnet is equipped with a coil 1 in which a coil wire 3 is wound around a bobbin 2. After an insulating sheet 4 is pasted on the outer periphery of the coil 1, the coil wire 3 is
A connecting portion 6 in which the terminal of the coil 1 and the lead wire 5 are soldered is fixed by an insulating tape 7 that is wrapped around the outer circumference of the coil 1. A case 8 is wrapped around the outside of the coil 1 so as to cover it, and the lead wire 5 is inserted through a rubber grommet 9 fitted to the body of the case 8 and drawn out.

[Problem that the invention attempts to solve]

In such electromagnets, the outer diameter of the case is set large in order to prevent contact between the connecting part and the case, so an unnecessary space is formed between the case and the coil. However, there is a problem in that the volume of the entire device becomes large in proportion to the capacity.

An object of the present invention is to provide an electromagnet that can be downsized while ensuring insulation properties.

[Means for solving problems]

The electromagnet according to the present invention is integrally molded using an insulating resin, and has a pair of flanges 13, 13A at both ends of a cylindrical body 12, which are radially outward at right angles to the axis. The bobbins 11 and 11A are arranged and protrude in a circular ring shape, respectively, and the body portions 12 of the bobbins 11 and 11A are wound.
Coil wire material 14 made of a conductor with an insulating coating
The coils 15 and 15A are connected to both ends of the coil wire 14 at the beginning and end of the winding, respectively, via the connecting portions 18.
A pair of lead wires 17, 17, each of which is a conductor covered with an insulating material, is placed on the outside of the coils 15, 15A so as to be completely wrapped around them, and the outer periphery of each end is crimped so as to be pushed inward. In an electromagnet equipped with a cylindrical case 28 that is relatively integrated with the bobbin 11, 11A by processing, an annular groove 16 is provided on the outer periphery of the coil 15, 15A.
16A is arranged and recessed along one of the bobbin flanges 13, 13A, and both lead wires 1 are inserted into the annular grooves 16, 16A.
On the other hand, a pair of lead wire insertion parts 20 and 20A are cut on the outer peripheries of the flanges 13 and 13A adjacent to the annular grooves 16 and 16A of the bobbins 11 and 11A, respectively. Both insertion parts 20, 20A, 2
0 and 20A, protective pipes 21 with a stopper are arranged and fixed at right angles to the end faces of the flanges 13 and 13A, respectively.
7 and 17 are inserted through them, and both lead wires 17 and 17 are held and fixed by respective protective pipes 21 and 21, and the outer diameter of the coils 15 and 15A is the same as that of the flange 13 and the outer diameter of the coils 15 and 15A. 13A, and the inner diameter of the case 28 is set to the minimum dimension within a range in which the flanges 13, 13A can be inserted.

[Effect]

According to the above-mentioned means, since the lead wire is inserted into the annular groove formed on the outer periphery of the coil, the outer diameter of the coil including the lead wire becomes small, and the outer diameter of the case is reduced to the extent that it does not touch the outer periphery of the coil. It is only necessary to set the dimensions, and unnecessary internal space can be suppressed to a minimum. As a result, the ratio of volume to capacity can be kept small.

〔Example〕

FIG. 1 is a longitudinal sectional view showing an electromagnet that is an embodiment of the present invention, and FIG. 2 is a plan sectional view taken along the - line in FIG.

In this embodiment, this electromagnet is configured to be used in a solenoid such as a solenoid valve, and includes a bobbin 11 integrally molded using an insulating resin. The body 12 of the bobbin 11 is formed into a cylindrical shape, and a pair of flanges 1 are provided at both ends of the body 12.
3 are disposed perpendicularly to the axis, facing outward in the radial direction, and protrude in a circular annular shape. A coil wire 14 made of a conductor having an insulating coating is wound around the body 12 of the bobbin 11.
5 is substantially comprised. An annular groove 16 is disposed on the outer periphery of the coil 15 along the inside of one of the bobbin collars 13, and is recessed so as to accommodate a lead wire to be described later. Possible means for forming the annular groove 16 on the outer periphery of the coil 15 include a method in which the number of turns of the coil wire 14 is reduced.

One end of a lead wire 17 made of a conductor covered with an insulator is soldered to both ends of the coil wire 14 at the beginning and end of winding, respectively.
The soldered portion substantially constitutes the connecting portion 18. The lead wire 17 is arranged so as to fit into the annular groove 16 and is wound around the outer periphery of the coil 15. At this time, an insulating sheet (not shown) is laid at the bottom of the annular groove 16, and the connection part 18 is placed on this insulating sheet, or an insulating tube is used to ensure insulation. It is desirable to process it in such a way. An insulating tape 19 is wound and adhered onto the annular groove 16 on the outer periphery of the coil 15, and the lead wire 17 is covered with this tape 19 and is fixed to the coil 15. At this time, the outer diameter of the coil 15 is approximately the same throughout the length.

On the other hand, on the outer periphery of the collar 13 adjacent to the annular groove 16 of the bobbin 11, a pair of notches 20 are formed as lead wire insertion parts, and each of the notches 20 has a protective pipe 21 with a retainer. It is arranged and fixed at right angles to the end face of the flange part 13. The lead wire 17 is inserted into the pipe 21, and the pipe 21 is caulked so as to be crushed after the lead wire 17 is inserted.
Therefore, the lead wire 17 is held and fixed by the caulked pipe 21.

A cylindrical sleeve 22 is fitted into the bobbin body 12, and a plunger 2 is inserted into the sleeve 22.
3 is accommodated so as to be slidable in the axial direction. A spring 24 and a mounting member 25 are provided at both ends of the sleeve 22, and the mounting member 25
is configured to be screwed onto a frame or the like (not shown) of the solenoid valve. An end plate 26 is brought into contact with the outer end surface of the flange 13 of the bobbin 11 on the side opposite to the attachment member 25, with a spacer 27 interposed therebetween.

A cylindrical case 28 is disposed on the outside of the coil 15 so as to enclose the entire body, and the case 28 is caulked so that the outer periphery of both ends of the case 28 is pressed inward, thereby attaching the bobbin 11 to the coil 15. , are relatively integrated with the mounting member 25, end plate 26, etc. here,
The inner diameter of the case 28 is such that the inner circumference of the case 28 is the same as that of the coil 15.
The inner circumference of the case 28 and the coil 1 are set to the minimum dimensions that can avoid contact with the outer circumference of the case 28.
5. The unnecessary space between the outer periphery and the outer periphery is set to a minimum.

Next, the effect will be explained.

When the coil wire 14 is energized through the lead wire 17, the plunger 23 is moved by the magnetic force of the coil 15.
is slid. At this time, although the radial dimension of the case 28 is set small, the outer diameter dimension of the coil 15 is maintained at the desired value, so the plunger 23 is driven by a magnetic force of the desired magnitude. It turns out.

By the way, in the electromagnet shown in FIG. 5, when an external force is applied to the lead wire 5 in the pulling direction, the external force tends to be directly applied to the connecting portion 6, so that disconnection defects are likely to occur. .

However, in this embodiment, the lead wire 17 is inserted into the annular groove 16 and wound around the coil 15, and is also pulled out in a direction parallel to the axis through a notch 20 formed in the flange 13. Therefore, even if an external force is applied to the lead wire 17 in the pulling direction, the external force will not be directly applied to the connection part 18, and as a result, the occurrence of disconnection defects can be prevented. . Moreover, since the lead wire 17 is firmly held by the pipe 21 fixed to the flange 13, the transmission of the pulling force is blocked by the pipe 21, and it is certain that a disconnection failure will occur. Prevented.

FIG. 3 is a partial vertical sectional view showing another embodiment of the present invention, and FIG. 4 is a plan sectional view taken along the - line in FIG.

This embodiment differs from the previous embodiments in that the annular groove 1 into which the coil wire 14 is fitted and wound is
6A is formed on the outer periphery of the flange 13A of the bobbin 11A in the coil 15A. Further, a notch 20A is provided in the flange 13A to prevent the pipe 21 from coming off from interfering with the lead wire 17.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes are possible.

For example, the electromagnet according to the present invention is not limited to use in solenoids, but can be used for other purposes.

[Effect of idea]

As explained above, according to the present invention, by inserting the lead wire into the annular groove formed on the outer periphery of the coil, the diameter of the case surrounding the coil can be set to the minimum dimension, thereby increasing the capacity. It is possible to realize downsizing while suppressing the decrease in size.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an electromagnet that is an embodiment of the present invention, and FIG. 2 is a plan sectional view taken along the - line in FIG. FIG. 3 is a partial vertical sectional view showing another embodiment of the present invention, and FIG. 4 is a plan sectional view taken along the - line in FIG. FIG. 5 is a longitudinal sectional view showing a conventional example. 11, 11A... Bobbin, 12... Body, 1
3,13A...Flame part, 14...Coil wire material, 1
5, 15A... Coil, 16, 16A... Annular groove, 17... Lead wire, 18... Connection portion, 19...
...Insulating tape, 20, 20A...Notch (lead wire insertion part), 21...Protection pipe with retainer,
22...Sleeve, 23...Plunger, 24...
... Spring, 25 ... Mounting member, 26 ... End plate, 27 ... Spacer, 28 ... Case.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of flanges 13, 13A at both ends of the body 12, which is integrally molded using insulating resin and formed in a cylindrical shape, are perpendicular to the axis and have a diameter. Bobbins 11 and 11A are arranged outward in the direction and protrude in a circular annular shape, and the bobbins 11,
Coils 15, 15A are wound around the body 12 of the coil wire 11A and are equipped with a coil wire 14 made of a conductor having an insulating coating, and a connecting portion 18 is connected to both ends of the coil wire 14 at the beginning and end of the winding. A pair of lead wires 17, 17 each having a conductor coated with an insulating material are arranged so as to wrap around the entire outside of the coils 15, 15A, with the outer periphery of both ends facing inward. The electromagnet is equipped with a cylindrical case 28 that is relatively integrated with the bobbins 11 and 11A by caulking so that the coils 15 and 15A are pushed down.
6 and 16A are arranged and recessed along one of the bobbin flanges 13 and 13A, and both of the lead wires 17 and 17 are accommodated and wound in the annular grooves 16 and 16A, respectively. On the other hand, a pair of lead wire insertion parts 20, 20A are cut in the outer peripheries of the flanges 13, 13A adjacent to the annular grooves 16, 16A in the bobbins 11, 11A, respectively.
A, 20, 20A are provided with protective pipes 21 that are fixed to prevent them from coming off and are arranged perpendicularly to the end faces of the flanges 13, 13A, respectively, and inside these protective pipes 21 are both the lead wires 1.
7 and 17 are inserted, and both lead wires 1
7 and 17 are held and fixed by respective protective pipes 21 and 21, and the outer diameters of the coils 15 and 15A are set to be equal to or smaller than the outer diameter of the flanges 13 and 13A of the bobbin, and the case 28 The inner diameter of the collar part 13, 13A
An electromagnet characterized in that the dimensions are set to the minimum within the range in which the electromagnet can be inserted. (2) The electromagnet according to claim 1, wherein the annular groove 16 is recessed in the outer periphery of the coil 15 so that the number of turns of the coil wire 14 is reduced. (3) The electromagnet according to claim 1, wherein the annular groove 16A is formed on the outer periphery of the flange 13A of the bobbin 11A of the coil 15A.