JPH0447923Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an electromagnetic device.

(Problems to be solved by the prior art and the invention) Conventionally, as an electromagnet device,
As shown in the figure, a coil bobbin 1 has flanges 3 and 4 facing each other at both ends of a cylindrical winding part 2, and a coil (not shown) wound around the winding part 2 of the coil bobbin 1. ), an iron core (not shown) inserted into the winding part 2, and a substantially L-shaped cross section, with the iron core protruding into the insertion hole 7 provided in the bent part 6 on one side. One end of the yoke 5 is fixed by caulking, and the other end thereof is disposed substantially parallel to the winding portion 2.

However, in this case, since the winding part 2 is merely cylindrical, there is a problem that the wound coil rotates out of alignment during coil winding or exterior taping, and the coil becomes disconnected as it rotates. Ta.

Furthermore, as shown in Japanese Utility Model Application No. 50-141633, it is conceivable to provide a cylindrical coil bobbin with a large number of protrusions in the longitudinal direction to prevent the coil from rotating. , the outer diameter of the wound coil becomes large, and if an attempt is made to keep the insulation distance from the yoke 5 constant, there is a problem that the device inevitably becomes larger.

Furthermore, the winding part 2 of the coil bobbin 1 has been made into a cylindrical shape having a triangular cross section, for example, but when this is done, there is a problem that the wound coil breaks at the corner. .

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an electromagnet device that secures insulation distance without increasing the size of the device and prevents the wound coil from being disconnected.

(Means for Solving the Problems) In order to achieve the above object, an electromagnet device according to the present invention includes a coil bobbin in which a cylindrical winding portion is provided with flanges facing each other at both ends thereof, and a winding portion of the coil bobbin. A coil wound around a winding part, an iron core inserted into an insertion hole of the winding part, and one side connected to one end of the iron core protruding from the insertion hole,
An electromagnet device comprising a yoke that is fixed and whose other side is arranged substantially parallel to the winding portion,
At least one protrusion is provided on the outer peripheral surface of the winding portion in the longitudinal direction of the winding, which does not protrude from a tangent on the yoke side among tangents to the outer peripheral surface of the winding portion that are parallel to the lower surface of the yoke. That is.

(Function) Therefore, according to the present invention, the distance between the wound coil and the yoke is constant, and the wound coil is locked to the protrusion of the wound portion, so that it does not rotate out of alignment. do not have.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings of FIGS. 3 to 7.

As shown in FIGS. 3 to 5 and 7, the electromagnet device according to the first embodiment is almost the same as the conventional example described above, except that a protrusion 8 is provided on the outer peripheral surface of the coil bobbin 1. Also, a protrusion 9 is provided at a symmetrical position with respect to the protrusion 8 and the axis 11.

As shown in FIG. 7, the protrusion 8 is provided on the outer peripheral surface of the winding part 2 of the coil bobbin 1 so as not to protrude upward from the tangent line m of the winding part outer peripheral surface parallel to the lower surface of the yoke 5. It is something.

Therefore, when the coil 14 is wound around the winding section 2, the coil 14 becomes non-circular in cross section due to the presence of the protrusions 8, so the wound coil rotates during the coil winding section or exterior taping. There will be no disconnection.

Further, the tip of the protrusion 8 does not protrude from the tangent line m, and the distance L between the lower surface of the yoke 5 and the coil 14 is
Since it is the same as the case shown in FIG. 1 without the protrusion 8, the insulation distance remains unchanged and the device does not become larger.

Note that the protrusions 8 and 9 are not limited to small protrusions as described above, but may be flat protrusions as shown in FIG. 6, and the number thereof is not limited to one.

In each of the above embodiments, the yoke 5 is L-shaped, but it may be a U-shaped yoke in which yoke pieces are disposed on both sides of the coil bobbin 1. Even in this case, the protrusion on the other side It is sufficient that the strip does not protrude from the tangent of the winding portion 2 parallel to the other yoke piece.

(Effects of the invention) As is clear from the above description, according to the present invention, at least one protrusion is provided on the outer peripheral surface of the cylindrical winding portion in the longitudinal direction of the outer peripheral surface.
Even when the coil is wound, since it is wound in a non-circular cross-section, the wound coil does not shift and rotate, so it is possible to prevent the coil from breaking.

Moreover, the protrusions are provided on the outer peripheral surface of the winding part so as not to protrude from the tangent to the outer peripheral surface of the winding part that is parallel to the lower surface of the yoke.In other words, the insulation distance between the wound coil and the lower surface of the yoke is Although the coil has a non-circular cross section, it is similar to the case where no protrusions are provided, and the device does not become larger in any way.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment according to a conventional example;
2 is a side view of FIG. 1 after assembly, FIG. 3 is an exploded perspective view of the first embodiment of the present invention, FIG. 4 is a side view of FIG. 3 after assembly, and FIG. Figure 4 -
6 is a sectional view of the second embodiment of the present invention, and FIG. 7 is an enlarged sectional view of the coil wound in FIG. 5. 1... Coil bobbin, 2... Winding section, 3, 4...
...Brim part, 5...Yoke, 6...Bending part (one side),
8, 9, 12, 13...projection, 14...coil.

Claims (1)

[Claims for Utility Model Registration] (1) A coil bobbin having a cylindrical winding portion with flanges facing each other at both ends, a coil wound around the winding portion of the coil bobbin, and the winding portion of the coil bobbin. an iron core inserted through an insertion hole in the part, and a yoke whose one side is connected and fixed to one end of the iron core protruding from the insertion hole, and whose other side is arranged substantially parallel to the winding part. In the electromagnet device, a protrusion that does not protrude from a tangent on the yoke side of the tangents to the outer peripheral surface of the winding portion parallel to the lower surface of the yoke is provided on the outer peripheral surface of the winding portion. An electromagnet device characterized in that at least one electromagnet is provided in the direction. (2) Claim 1 of the utility model registration claim is characterized in that the protrusions are provided on the outer circumferential surface of the winding part so as to face each other across the axis of the winding part. Electromagnetic device as described.