JPH06120058A - Electromagnetic device - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] A coil bobbin can be easily attached to a laminated core,
Moreover, it is an object of the present invention to provide an electromagnetic device in which the coil bobbin and the laminated iron core can be securely fixed together and noise due to vibration of the legs can be prevented. [Structure] A pair of laminated iron cores 2 in which legs 5 and 6 are arranged to face each other with a gap, a through hole 8 into which the legs 6 are inserted, and a coil 3 around which a coil 3 is wound. The coil bobbin 4 having the winding body portion 9 and the winding body portion 9 of the coil bobbin 4 facing the laminated iron core 2 are provided with displacement members protruding in the laminating direction of the laminated iron core 2. ,
When the coil 3 is wound around the coil bobbin 4, the coil 3 displaces the coil 3 toward the laminated core 2 and the insertion hole 8 is formed.
The inner surface of the laminated core protrudes, and when the pair of laminated iron cores 2, 2 is inserted into the coil bobbin 4, the displacement member abuts on the leg portion 6 of the laminated iron core 2 and is press-fitted. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic device for positioning and fixing a laminated iron core on a tubular winding body around which a coil of a coil bobbin is wound.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic device such as a transformer in which a coil is wound around a coil bobbin and then the coil bobbin is sandwiched between a plurality of laminated iron cores has a structure shown in FIGS. It has been known.

A main body 50 of the electromagnetic device having the construction shown in FIGS. 5 and 6 has flange portions 51 formed at both ends thereof, and a winding body portion 52.
Of the laminated iron core 57 in which the E-shaped iron core 56 is superposed in the thickness direction in the insertion hole 55 formed in the central axis of each cylindrical coil bobbin 54 made of synthetic resin such as plastic in which the coil 53 is wound around. The central leg portions 58 are inserted so as to face each other, and the both end leg portions 59 are joined by welding or the like. The laminated core 57 is formed with a slight space between the facing central legs 58, 58 due to magnetic characteristics and manufacturability. Taking into account about one iron core (0.3 mm to 0.5 mm)
It is getting thinner. Between the central legs 58 and the laminated core 5
7 in the gap between the inner peripheral surface 60 of the coil bobbin 54 and the adhesive 6
1 and the like are injected to integrally form the electromagnetic device body 50. Alternatively, a groove 62 may be formed on the inner peripheral surface 60 of the coil bobbin 54 in order to improve the fluidity of the adhesive 61.

Further, the main body 50 of the electromagnetic device is provided with a case lid 63 and a case bottom 64 made of a steel plate and having a substantially convex cross section.
It is sandwiched between and formed.

[0005]

However, in the electromagnetic device 50 having the above-mentioned structure, the injected adhesive 61 flows out before being cured, and the upper portion 58 of the central leg portion 58 of the laminated iron core 57.
On the side of the laminated core 57, the adhesive fixation becomes insufficient, and during the process of sandwiching and fixing the case lid 63 and the case bottom 64, the laminated iron core 57 is transported or wired, or due to the action of a magnetic field due to conduction to the coil. There is a problem that the iron core 56 is peeled off and noise is generated at the time of energization.

Further, although not shown, in order to fix the central leg portion and reduce the flow-out of the adhesive, a method of manufacturing by sandwiching a wire or the like between the opposing central leg portions along the thickness direction of the central leg portion. However, there is a problem that the number of members is increased and the manufacturability is reduced.

The present invention has been made in view of the above problems, and a coil bobbin can be easily mounted on a laminated iron core, and
An object of the present invention is to provide an electromagnetic device in which the coil bobbin and the laminated iron core can be reliably fixed together and noise due to vibration of the legs can be prevented.

[0008]

A pair of laminated iron cores in which legs are arranged to face each other with a gap, and a tubular shape around which coils are wound and through holes into which the legs are inserted are formed. A coil bobbin having a winding body of, and the winding body facing the lamination direction of the laminated core of the coil bobbin is provided with a displacement member protruding in the lamination direction of the laminated core, the displacement member, When a coil is wound around the coil bobbin, the coil is pressed by the coil, is displaced toward the laminated iron core side, and the inner surface of the insertion hole is projected, and when the pair of laminated iron cores is inserted into the coil bobbin, a displacement member is provided on the leg portion. It is equipped with.

[0009]

When the coil is wound around the winding body of the tubular coil bobbin, the displacement member formed on the winding body protrudes to the inner peripheral surface of the insertion hole and extends in the width direction of the central leg of the laminated core. Since the protruding portions that come into contact with each other are formed, when the central leg portions of the pair of laminated cores are inserted into the insertion holes so as to face each other, the central leg portions are inserted while being pressed against the protruding portions. The leg portions can be easily positioned and fixed by simply inserting into the insertion hole, and can be securely sandwiched integrally, and the generation of noise due to the vibration of the central leg portion when energized can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an electromagnetic device of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes an electromagnetic device body as an electromagnetic device, and the electromagnetic device body 1 is
For example, used in a transformer or the like used in a ballast of a lighting device (not shown), between the opposing E-shaped laminated iron cores 2,
The coil bobbin 4 having a rectangular tube shape around which the coil 3 is wound is sandwiched and fixed. The laminated core 2 is formed in an E shape having a plate-like member made of a steel plate or the like and having leg portions 5 projecting in the same direction at both ends and a central leg portion 6 projecting in the same direction as the leg portion 5. The formed iron cores 7 are formed by being stacked in the thickness direction. On the other hand, the coil bobbin 4 has a cubic columnar shape made of synthetic resin such as plastic and has the laminated core 2
A rectangular tubular winding body 9 is formed with a through hole 8 into which the central leg 6 is inserted as a central axis. Flange portions 10 are formed on both ends of the winding body 9 in the axial direction so as to face each other along the peripheral edge. Further, a plurality of terminal blocks 11 are formed on the flange portion 10 so as to project outward on the upper side 12 side, which is the same side of the flange portion 10,
The terminal block 11 of one flange portion 10 has terminal metal fittings 13,1
3 is attached so as to project outward along the axial direction. A coil 14 is wound around the winding body 9 by winding a conductor wire 14 whose surface is covered with insulation, and both ends of the coil 3 are entwined with the base ends of the terminal fittings 13, 13. .

Further, a displacement member 16 is attached to the winding body 9 on which the central leg surface 15 of the central leg 6 of the coil bobbin 4 abuts.
Are formed. The displacement member 16 is the winding body 9
Projecting from the outer surface 17 of the winding barrel 9 in the longitudinal direction of
The winding member 9 is formed on substantially the same surface as the back surface 19 of the winding body portion 9. Further, the displacement member 16 is displaceable so that the insertion hole 8 is formed.
A thin portion 18 is formed on the side of the displacement member 16. Furthermore, when the displacement member 16 is pressed toward the insertion hole 8 side,
It is displaced toward the insertion hole 8 side and protrudes inward from the back surface 19 of the insertion hole 8. The amount of protrusion is about one iron core, and when the central leg portion 6 of the laminated iron core 2 is inserted into the insertion hole 8, it is fixed to abut.

On the other hand, 20 is a case body, and this case body 2
Reference numeral 0 denotes a case bottom plate 21 having a substantially U-shaped cross section attached to a chassis of a lighting fixture (not shown), and a case body 20 having a substantially convex cross-section fitted to the case bottom plate 21. It consists of and. The case bottom plate 21 is made of a steel plate that has been subjected to vibration damping processing, and is made of a bottom plate portion 22 and the bottom plate portion 2.
2 is formed from a pair of joint pieces 23 that are bent in a substantially U shape from both sides in the longitudinal direction. In addition, this joint piece 23
A mounting surface 24 is formed on the upper surface of the joining piece portion 23 so that the lower surface portion of the laminated iron core 2 of the electromagnetic device body 1 contacts.
Further, at both ends of the bottom plate portion 22, mounting holes 25 which are screwed to a chassis of a lighting device (not shown) are formed. Further, the case body 20 is formed with contact portions 27 for sandwiching the upper surface portion 26 of the laminated iron core 2 of the electromagnetic equipment body 1, and further, a pair of contact portions 27 bent downward are formed. The side plate portion 28 is formed, and a plurality of caulking pieces 29 that protrude downward in a rectangular shape are formed at intervals at the edge portions of each side plate portion 27 with a gap. In the electromagnetic equipment body 1, the laminated core 7 and the contact portion 27 of the case body 20 are connected to each other.
It is clamped by the bottom plate 21, and the crimping piece 29 of the case body 20 is crimped by engaging with the lower end edge of the joining piece part 23 of the case bottom plate 21 to clamp and hold the main body 1 of the electromagnetic device. It is arranged and fixed to.

In the embodiment shown in FIGS. 1 to 4, the explanation was made without using the adhesive, but the gap may be filled with the adhesive as in the prior art.

Next, the operation of the above embodiment will be described with reference to the drawings. First, a coil 14 is wound around a winding body 9 of a coil bobbin 4 in which a terminal fitting 13 is attached to a terminal block 11 to form a coil 3, and both ends of the coil 3 are connected to the terminal fitting 13. Engage with the base end and solder. When the conducting wire 14 is wound around the winding body portion 9 of the coil bobbin 4, the displacing member 16 formed so as to project from the outer surface of the winding body portion 9 toward the insertion hole 8 side by the winding force of the conducting wire 14. It is displaced and protrudes inward from the inner peripheral surface of the insertion hole 8 to form a protrusion that abuts in the width direction of the central leg 6 of the laminated iron core 2, and is prevented from returning to its original position by the conductor 14. It Next, when the central leg portions 6,6 of the pair of laminated iron cores 2,2 are inserted into the insertion holes 8 so as to face each other, the central leg portions 6,6 are inserted while being pressed against the projecting portions. By simply inserting the central leg portion 6 into the insertion hole 8, the leg portions 5 and 6 can be positioned and fixed easily and can be securely held together, and the projecting portion can be returned to its original position by the conducting wire 14. Since the conductor 14 is blocked, when the force is applied to the conductor 14, the conductor extends. Therefore, when the central leg portion 6 is inserted into the insertion hole 8, the protrusion has the spring property of the displacement member as much as the conductor is displaced. Therefore, it is easy to insert the central leg portion, and the positioning and fixing of the central leg portion can be surely performed. Further, the workability is improved, and the noise due to the vibration of the central leg portion 6 at the time of energization can be prevented.

[0015]

Since the present invention is configured as described above, the displacement member formed on the winding body is displaced toward the insertion hole by simply winding the conductive wire around the winding body of the coil bobbin. The protrusions are formed so as to protrude inward from the inner peripheral surface, and the central legs of the pair of laminated iron cores are simply inserted into the insertion holes so that they face each other, and the central legs are inserted while being pressed against the protrusions. Then, it is positioned and fixed and can be securely clamped integrally. Also,
Since the projecting portion is prevented from returning to its original position by the conductive wire, when the central leg is inserted into the insertion hole, the projecting portion has a spring property as much as the conductive wire is displaced, so that the central portion is formed. The legs are easy to insert, and the positioning and fixing of the central leg can be ensured, and the workability is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an electromagnetic device of the present invention.

FIG. 2 is a perspective view of a coil bobbin of the present invention.

FIG. 3A is a plan sectional view of a displacement member of the coil bobbin of the present invention.

FIG. 3B is a plan sectional view when an external force is applied to the displacement member of the coil bobbin of the present invention.

FIG. 4 is a plan sectional view of a coil bobbin of the present invention in which a conductive wire is wound.

FIG. 5 is an exploded perspective view showing an example of a conventional electromagnetic device.

FIG. 6 is a perspective view of a conventional coil bobbin.

[Explanation of symbols]

 2 Laminated iron core 3 Coil 4 Coil bobbin 6 Leg 8 Insertion hole 9 Winding body 16 Displacement member

Claims (1)

[Claims] 1. A pair of laminated cores in which legs are arranged to face each other with a space, and a cylindrical winding cylinder around which a coil is wound and an insertion hole into which the legs are inserted is formed. A coil bobbin having a portion, and a winding member facing the laminating direction of the laminated iron core of the coil bobbin is provided with a displacement member protruding in the laminating direction of the laminated iron core. When it is wound, the coil is pressed by the coil, is displaced toward the laminated core, the inner surface of the insertion hole is projected, and when the pair of laminated cores is inserted into the coil bobbin, the displacement member comes into contact with the leg portion. An electromagnetic device characterized by being press-fitted.