JPH01209709A - Electromagnetic equipment - Google Patents

Abstract

PURPOSE:To push the floating of the laminated plates of a laminated iron core, to prevent the generation of beat sound and to improve magnetic characteristics, by bringing the bottom part of a terminal cover into contact with the upper surface of the laminated iron core in the laminating direction. CONSTITUTION:A terminal cover 16 is placed on a terminal 15 from the front side. A pushing protruding part 37 of the bottom part of the cover is pushed and slidden on the upper surface of a laminated iron core 14 and inserted. Engaging steps 34 on both sides of the cover 16 are engaged with pawls 25 of a coil bobbin 12 and the cover is attached to the bobbin 12. When the pushing protruding part 37 of the terminal cover 16 is pushed on the upper surface of the iron core 14, contact resistance is small in comparison with the case wherein an entire bottom surface 36 of the cover 16 is pushed on the upper surface of the core 14. Since the pushing protruding part 37 is provided in a tapered shape in the inserting direction, the pushing protruding part 37 can be readily inserted even if the part is pushed on the upper surface of the core 14. The bottom surface of an electromagnetic-equipment body 11 is covered with a bottom plate 61. The upper surface and both side surfaces are covered with a case 62 as a unit. Both side-edge parts of a side-leg iron core 42 of the laminated iron core 14 between the bottom plate 61 and the case 62 are covered with the case 62. The both side-edge parts are held from the laminating direction. Under this state, the lower end parts on both sides of the case 62 are connected to both side edge parts of the bottom plate 61 by caulking.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objectives of the Invention) (Field of Industrial Application) The present invention relates to electromagnetic equipment, such as ballasts for discharge lamps.

(Prior art) As an electromagnetic Ia device, for example, as shown in Fig. 7, a coil 1
The coil bobbin 2 wound with the coil bobbin 2 is fitted onto the outer periphery of the center leg of the laminated core 3 formed by laminating a plurality of laminated plates 3a, and protrudes from the laminated core 3 and the upper and lower surfaces of the laminated core 3 in the lamination direction. There is a ballast for a discharge lamp in which a bottom plate 4 and a case 5 are attached to cover a coil 1. The bottom plate 4 covers the lower surface of the laminated core 3, etc., and the case 5 integrally covers the top and both side surfaces of the laminated core 3, etc., and the bottom plate 4 and the case 5
W
Both lower end edges of the case 5 are caulked and joined to both side edges of the bottom plate 4 while being sandwiched from the direction of the A layer.

(Problems to be Solved by the Invention) By the way, the laminated core 3 is divided into two parts, such as an El core, an I-shaped core, and a pair of E-shaped cores, in order to fit the coil 1 into the central leg within the shell. It is constructed by laminating laminate plates 3a having these shapes, and the laminate plates 3a are held by caulking the bottom plate 4 and the case 5 without fixing the laminate plates 3a,
Outside of the butt part of the two cores (laminated surface covered by case 5)
The laminated plate 3a is held and fixed by welding, etc. However, the laminated portion of the laminated core 3 located outside the flange portion of the coil bobbin 2, that is, the laminated portion on both end faces of the laminated core 3, is held between the laminated plates 38. In many cases, it is not clamped by a case or fixed by welding, etc.

Therefore, when the laminated core 3 is caulked with the bottom plate 4 and the case 5, as shown in FIG. The floating laminated plate 3a resonates due to the magnetic vibration at the time, generating a humming sound and affecting the magnetic properties.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide an electromagnetic device that can prevent the laminates of the laminated iron core from floating, thereby preventing the generation of humming noise and improving the magnetic properties. It is something to do.

[Structure of the invention]

(Means for Solving the Problems) The present invention has an electromagnetic device main body in which a coil wound around a coil bobbin is fitted into a laminated iron core, and protrudes from the upper surface of the laminated iron core in the I11 direction of the electric mis main body. An electromagnetic device in which a terminal is attached to the outside of the 7 flange portion of a coil bobbin, a terminal cover is attached to cover the terminal, and a bottom plate and a case are caulked and attached to the laminated iron core so as to cover the periphery of the electric generator main body. In this case, the bottom part of the terminal cover is attached to the top surface of the laminated core in the stacking direction.

Further, a presser protrusion is provided on the bottom of the terminal cover to abut against the upper surface of the laminated core in the stacking direction.

(Function) The present invention provides a laminated core that covers the periphery of an electromagnetic equipment body and is attached to the laminated core by tightly connecting the bottom plate and the case by making the bottom of the terminal cover come into contact with the upper surface of the laminated core in the stacking direction. Prevents the laminate from floating on the end surface.

In addition, the holding protrusion on the terminal cover makes contact with the top surface of the laminated core when attaching the terminal cover to the coil bobbin.
Reduce dynamic resistance.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

In the figure, reference numeral 11 denotes an electromagnetic MVS main body, which is composed of primary and secondary coils 13 wound around a pair of coil bobbins 12, and a laminated iron core 14 into which the coils 13 are fitted. A self-locking terminal 15 and a terminal cover 16 are attached to cover the terminal 15.

The coil bobbin 12 has flange portions 22 provided on both sides of a winding drum portion 21 around which a coil 13 is wound, and a pair of terminal block portions 23 to which terminals 15 are attached are arranged in parallel on the outside of one of the flange portions 22. At the same time, each terminal block section 23
A locking claw 25 having a claw portion 24 that engages with the terminal cover 16 at the tip thereof is protrudingly provided at a side position of the terminal cover 16 .

Further, the terminal 15 attached to the terminal block portion 23 of the coil bobbin 12 is made of a conductive material having spring properties such as phosphor bronze, and is approximately U-shaped from the front end of the connecting piece portion 26 toward the lower surface of the connecting piece portion 26. A locking piece 27 is provided by being bent into a shape, and a fixing piece 28 that is attached to the terminal block part 23 from the rear end of the connecting piece 26 is bent, and a lead wire is inserted into the front surface of the locking piece 27. A hole 29 is provided. Note that FIG. 1 shows a narrow terminal 15 having one lead wire insertion hole 29 and a wide terminal 15 having two lead wire insertion holes 29.

The terminal cover 16, which is attached to the coil bobbin 12 while covering the terminals 15, is made of synthetic resin having electrical insulation properties, and has terminal storage PIIs 31 partitioned by partition walls 30 to correspond to the respective terminals 15. A lead wire insertion hole 32 is provided inside and communicated with each of the terminal accommodating portions 31 on the front surface. The terminal housing section 31 of the terminal cover 16 has an open rear surface, a cover portion 33 protruding from the upper part of the rear end, locking steps 34 on both sides, and a lower edge. A regulating protrusion 35 is provided protruding from the bottom surface 36, and a presser protrusion 37 is provided protruding from the bottom surface 36. This presser protrusion 37 is
A band-shaped protrusion is provided along the front-rear direction at the center and both sides of the bottom surface 36, and the width of the protrusion from the bottom surface 36 is tapered such that the width of the protrusion is larger on the front side and smaller on the rear side.

As shown in FIG. 5, the laminated core 14 has a structure in which it is separated into a central leg core 41 around which the coil 13 is wound and a side leg core 42 having a rectangular annular shape. This central leg core 4
1, a predetermined number of laminated plates 41a are laminated, each having a central leg joint surface 43 formed of a punched surface with the side leg core 42 on both end surfaces, and a pass portion 44 approximately in the middle of both sides. The laminated plate 4 is secured by caulking portions 45 provided at two locations.
1a are interconnected to form a layered structure. Further, the side leg core 42 has a rectangular opening 46 on the inside, and the laminated plate 4 of the center leg core 41 has a rectangular opening 46 on the inside of the yoke part 47.
Rectangular annular laminated plates 42a each having a side leg joint surface 48 constituted by a stamped surface obtained by punching 1a are laminated in correspondence to the number of laminated layers of the central leg core 41, and caulked portions 49 are provided near the four corners. The laminated plates 42a are interconnected to form a laminated structure. As shown in FIG. 6, the caulking portions 45, 49 are formed by caulking approximately V-shaped caulking pieces 51 of the upper laminated plates 41a, 42a into caulking holes 50 provided in the lower laminated plates 41a, 42a. It is supposed to be done.

To assemble the electromagnetic device body 11, first attach the terminals 15 to each terminal block part 23 of the coil bobbin 12, wind the coil 13 around the winding WApH 21, and connect the lead wire of this coil 13 to the terminal 15. .

Next, the primary and secondary coils 13 are wound around both ends of the central leg core 41, and the lζ coil bobbin 12 is attached to the central leg core 41. The center leg core 41 and the like are inserted between the inner sides of the frontage portions 46 of the side leg cores 42 by press-fitting them into the surfaces 48 from above, and the center leg core 41 and the side leg cores 42
Combine which.

Next, the terminal cover 16 is placed over the terminal 15 from the front, and the holding protrusion 37 at the bottom is pressed against the top surface of the laminated iron core 14 and inserted while sliding, and the locking steps 34 on both sides of the terminal cover 16 are engaged with the coil bobbin 12. It is attached to the coil bobbin 12 by being engaged with the retaining claw 25. At this time, terminal cover 1
By press-contacting the presser protrusion 37 of No. 6 to the upper surface of the laminated core 14, the contact resistance is lower than when the bottom surface 36 of the terminal cover 16 is entirely press-contacted to the upper surface of the laminated core 14. Since the portion 31 is provided in a tapered shape in the insertion direction, even if the presser protrusion 37 comes into pressure contact with the upper surface of the laminated iron core 14, it can be easily inserted. In the attached state of the terminal cover 16, the horizontal position of the terminal cover 16 in the front, rear, left and right directions is determined by the locking claws 25, and the cover portion 33 of the terminal cover 16 is joined onto the flange portion 22, and the regulating protrusion 35 is joined to the lower surface of the locking pawl 25, thereby determining the vertical position of the terminal cover 16. Therefore, the terminal cover 16 is positioned and fixed with respect to the coil bobbin 16, and the pressing protrusion 37 is pressed against the upper surface of the laminated core 14. Power is maintained.

The electromagnetic device main body 11 assembled in this way has a bottom plate 6.
1 covers the bottom surface, the case 62 integrally covers the top surface and both sides, and the bottom plate 61 and the case 62
Both side edges of the side leg cores 42 of the laminated core 14 covered by the case 62 are sandwiched between them from the stacking direction, and the lower edges of the case 62 are caulked and joined to both side edges of the bottom plate 61. .

By caulking the bottom plate 61 and the case 62 to the electromagnetic II main body 11, the central part of the laminated plate 42a on the outside in the lamination direction at both end faces of the laminated core 14, that is, the yoke portion 47 of the side leg core 42, tends to float up. However, coil bobbin 1
Since the holding protrusion 37 of the terminal cover 16 attached to the terminal cover 2 is pressed against the upper surface of the upper laminated plate 42a,
It is possible to reliably prevent the wi layer plate 42a from floating up.

Note that the terminal cover 16 may be attached to the coil bobbin 12 after the bottom plate 61 and the case 62 are attached. In this case, the upper @ layer plate 42a may float up due to the attachment of the bottom plate 61 and the case 62. Even though
By attaching the terminal cover 16, the floating laminate 42a can be held down.

Further, the terminal cover 16 has a presser protrusion 37 protruding from the bottom surface 36 that contacts the upper surface of the laminated iron core 14, and the electromagnetic device main body 1
1, there is a gap 63 between the bottom surface 36 and the top surface of the 8IiW4 core 14, so even if the heat generated by the coil 13 is transmitted and the temperature of the laminated core 14 increases when the coil 13 is energized, the temperature of the laminated core 14 increases. The heat from the laminated core 14 is less likely to be transmitted to the terminal cover 16 than when the bottom surface 36 is brought into contact with the entire top surface of the laminated core 14.
The terminal 15 housed inside the terminal 6 can be prevented from being oxidized, and the contact resistance between the terminal 15 and the lead wire connected to the terminal 15 can be reduced.

Further, the shape of the presser protrusion 31 of the terminal cover 16 may be a plurality of protrusions, in addition to the band shape as in the above embodiment.
In those cases, it is desirable to have a tapered surface or an arcuate surface in the direction of insertion into the coil bobbin 12 in order to facilitate insertion.

〔Effect of the invention〕

According to the present invention, the bottom part of the terminal cover comes into contact with the upper surface of the laminated core in the lamination direction, so that the end face of the laminated core when the bottom plate and the case are caulked and attached to the laminated core while covering the periphery of the electromagnetic device main body. It is possible to suppress the floating of the laminated plate in the magnetic field, prevent the generation of humming noise, and improve the magnetic properties.

In addition, the pressing protrusion at the bottom of the terminal cover can reduce the sliding resistance against the upper surface of the lrI layer core in the stacking direction when attaching the terminal cover to the coil bobbin, making it easier to attach the terminal cover.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electromagnetic device of the present invention, FIG. 2 is a perspective view of the terminal cover seen from the bottom, FIG. 3 is an end view of the assembled state, and FIG. 4 is an overall view of the electromagnetic device. FIG. 5 is a perspective view of the product Wi iron core, FIG. 6 is a sectional view of the caulked portion thereof, and FIG. 7 is an end view of the conventional electromagnetic vA device. 11. Electromagnetic equipment body, 12. Coil bobbin, 13.
・Coil, 14...Metal core, 15...Terminal, 16...
Terminal cover, 22...7 lange part, 37...presser protrusion,
61...Bottom plate, 62...Case.

Claims (2)

[Claims] (1) It has an electromagnetic device body in which a coil wound around a coil bobbin is fitted into a laminated core, and a terminal is attached to the outside of the flange portion of the coil bobbin that protrudes from the upper surface in the stacking direction of the laminated core of the electromagnetic device body. In an electromagnetic device in which a terminal cover is attached to cover the terminal, and a bottom plate and a case are caulked and attached to the laminated core to cover the periphery of the electromagnetic device main body, the bottom of the terminal cover is attached to the laminated core. An electromagnetic device characterized by being mounted in contact with the top surface in the stacking direction. (2) The electromagnetic device according to claim 1, further comprising a presser protrusion projecting from the bottom of the terminal cover to abut against the upper surface of the laminated core in the lamination direction.