JP2002313626A - Electromagnet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnet device which has a wide margin for selecting its assembling process and for which the work of the assembling process can be designed easily. SOLUTION: A spool 21 has a pair of winding drum sections 24 and 25 which are faced to each other in parallel at a prescribed interval and guide grooves 27 and 28 into which an iron core 40 is slidingly inserted are respectively provided on the facing surfaces of the winding drum sections 24 and 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet device,
The present invention relates to a thin electromagnet device.

[0002]

2. Description of the Related Art Conventionally, as an electromagnet device, for example, there is an electromagnet device using a coil bobbin described in Japanese Patent Application Laid-Open No. 7-297024. That is, in a coil bobbin in which a coil wound portion is mounted around an iron core having a polygonal cross section, a cutout portion is provided in a corner portion having a polygonal cross section of the iron core, and the coil wound portion is provided with a coil. A coil bobbin characterized by being formed with a molded body that fills a cutout portion of an iron core so that a gap is provided between the coil and the iron core when is wound.

However, the formed body of the coil-wound portion has a cross-sectional shape that fills the cutout of the iron core so that a gap can be formed between the coil and the iron core when the coil is wound. is there. For this reason, as a result, the molded body has an elongated shape, and it is necessary to perform outsert molding at a corner portion of the iron core. The work of inserting the core cannot be performed. As a result, the conventional coil electromagnet apparatus has a problem in that the order of the assembling steps is limited, and there is little room for selecting an assembling step.

SUMMARY OF THE INVENTION [0004] In view of the above problems, an object of the present invention is to provide an electromagnet apparatus which has a large scope for selecting an assembling process and facilitates work design in the assembling process.

[0005]

To achieve the above object, an electromagnet apparatus according to the present invention is an electromagnet apparatus in which a coil is wound around a spool through which an iron core is inserted, wherein the spool faces in parallel at a predetermined interval. In addition to having a pair of winding drums, guide grooves are provided on opposite surfaces of the winding drum so that the iron core can be slidably fitted thereto.

Therefore, according to the present invention, the iron core may be inserted immediately after forming the spool, or the iron core may be inserted after winding the coil around the spool. For this reason, an electromagnet device is provided which has a wide range of choices in the assembling process and facilitates the work design in the assembling process. Further, since the guide groove is provided on the opposite surface of the body portion so that the iron core can be slidably fitted therein, the iron core can be easily inserted without any deviation when the iron core is inserted. For this reason, even if the iron core is inserted after the coil is wound around the spool, disconnection of the coil when the iron core is inserted can be effectively prevented. Further, a pair of body portions of the spool are arranged on the opposing surface of the iron core. In particular, if a pair of body portions of a spool are respectively disposed on the upper and lower end surfaces of an iron core having a vertically long cross section, the winding height can be secured and a thin electromagnet device can be obtained. Further, since it is only necessary to provide a minimum notch in the corner portion of the iron core so as to be able to slide into the guide groove of the body portion, an electromagnet device with a small loss in the cross-sectional area of the iron core can be obtained.

Further, the cross-sectional shape of the winding drum section may be formed to be vertically long. According to this embodiment, the second moment of area of the winding drum portion is increased, and the bending during coil winding can be prevented, so that the workability of coil winding is improved.

Further, the side surface of the winding drum section and the side surface of the iron core may be formed flush. According to the present embodiment, even when the coil is wound, no gap is generated between the coil and the iron core. Therefore, while the cross-sectional area of the iron core can be used effectively,
Even with the same cross-sectional area, there is an effect that the number of coil turns increases and an electromagnet device having a large magnetomotive force can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS. The embodiment according to the present invention is a case where the present invention is applied to an electromagnet block 20 incorporated in various electronic devices.

As shown in FIG. 2, the electromagnet block 20 includes a spool 21 and a pair of coil terminals 30 and 31.
, A coil 39, an iron core 40, and a yoke 50.

The spool 21 has a pair of flanges 22, 2
This is a resin molded product in which a pair of winding drum portions 24 and 25 are vertically extended between three. The flanges 22 and 23 are provided with square holes 22a and 23a having the same axis. Further, guide grooves 24a and 25a for guiding the iron core 40 are formed on the facing surfaces of the winding drum portions 24 and 25, respectively. A mounting base 26 for press-fitting coil terminals 30 and 31 described below extends on the flange portion 22 of the spool 21. The mounting base 26 has two coil terminals 3
Press-in holes 27 and 28 for press-fitting 0 and 31 are formed.

As shown in FIG. 3, the iron core 40 is made of a plate-shaped magnetic material having a wide one end, and the one end is bent to form a magnetic pole part 41. The magnetic pole portion 41 has a suction area expanded by crushing or shaving the suction surface 41a. Further, guide ridges 43 and 44 are provided on the upper and lower end surfaces of the iron core 40, respectively, for easy and reliable insertion into the spool 21. However, the guide ridges 43,
The intermediate portion 44 is discontinuous in order to reduce frictional resistance during insertion.

As shown in FIG. 2, the yoke 50 is made of a magnetic material bent in a substantially L-shape. On the other hand, a crimping hole 53 is provided in the vertical portion 52 of the yoke 50.

As shown in FIG. 2, the pair of coil terminals 30 and 31 are formed with horizontal portions 32a and 33a by bending the external lead-out terminals 32 and 33, respectively. The vertical portions of the coil terminals 30 and 31 are also pressed to form step portions 30a and 31a. However, the coil terminals 30 and 31 are connected by connecting portions 34 and 35 before attachment to the spool 21. Therefore, the coil terminals 30 and 31 are separated by cutting off the connecting portions 34 and 35 after being mounted on the mounting base 26 of the spool 24.

Therefore, the mounting base 2 for the spool 21
6, the coil terminals 30, 31 are inserted into the press-fit grooves 27, 28.
And press-fit each so that the lashes protrude. The coil 39 is attached to the winding drum portions 24 and 25 of the spool 21.
, And the lead wire is tied to the kinked portions of the coil terminals 30 and 31 and soldered.

Next, the square hole 2 of the flange 22 of the spool 21
2a, one end 42 of the iron core 40 is inserted, and
The guide ridges 43 and 44 of the iron core 40 are fitted and inserted into the guide grooves 24a and 25a of the 4, 25, respectively. At this time, FIG.
As shown in (A), both sides of the iron core 40 and the winding drum 24,
25 are flush with each other. Therefore, according to the present embodiment, as compared with the conventional example shown in FIG. 4B, the coil 3 is wound around the rectangular cylinder-shaped winding drum of the spool 2 in which the iron core 1 is inserted. There is an advantage that a thin electromagnet device can be obtained.

Then, one end 42 of the iron core 40 protruding from the square hole 23a of the flange 23 is fixed to a crimping hole 53 provided in the vertical part 52 of the yoke 50. Subsequently, the electromagnet block 20 is completed by cutting off the connecting portions 34 and 35 of the coil terminals 30 and 31.

[0018]

According to the present invention, the iron core may be inserted after the spool is formed, or the iron core may be inserted after the coil is wound around the spool. For this reason, there is an effect that an electromagnet device is provided in which there is wide room for selecting an assembling process and the work design of the assembling process is easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electromagnet block according to the present invention.

FIG. 2 is an exploded perspective view of the electromagnet block shown in FIG.

FIG. 3 is an enlarged perspective view of the iron core shown in FIG. 1 as viewed from a different angle.

4A is a partial sectional view of the electromagnet block shown in FIG. 1, and FIG. 4B is a partial sectional view of an electromagnet block according to a conventional example.

[Explanation of symbols]

20: electromagnet block, 21: spool, 22, 23 ...
Flanges, 24, 25: winding drum, 24a, 25a: guide groove, 26: mounting base, 27, 28: guide groove, 30, 31
... Coil terminals, 32, 33 ... Terminal parts, 32a, 33a ...
Horizontal portion, 34, 35 connecting portion, 30a, 31a step portion, 39 coil, 40 iron core, 41 magnetic pole portion, 41a
... suction surface, 43, 44 ... guide ridge, 50 ... yoke.

Claims (3)

[Claims] 1. An electromagnet device in which a coil is wound around a spool through which an iron core is inserted, wherein the spool has a pair of winding drums facing each other in parallel at a predetermined interval, and the opposite surface of the winding drum, An electromagnet device comprising: a guide groove in which an iron core is slidably fitted. 2. The electromagnet device according to claim 1, wherein a cross-sectional shape of the winding drum is elongated. 3. The electromagnet device according to claim 1, wherein a side surface of the winding drum portion and a side surface of the iron core are flush with each other.