JP2842562B2 - Electromagnetic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic device such as a discharge lamp ballast provided with a coil bobbin having a terminal block.

[0002]

2. Description of the Related Art Hitherto, as this type of electromagnetic equipment, for example, a configuration described in Japanese Patent Application Laid-Open No. Hei 1-30912 is known. Or a discharge lamp ballast of a lighting fixture as shown in FIG.

The electromagnetic devices shown in FIGS. 9 to 11 are:
It has a coil bobbin 63 around which the coil 61 is wound and the iron core 62 is inserted, and the coil bobbin 63 is provided with flange portions 65 at both ends of a cylindrical winding body portion 64 around which the coil 61 is wound on the outer peripheral surface. In addition, a terminal block 66 is provided on the outer surface of the flange portion 65. The terminal block 66 has a plurality of box-shaped terminal holding portions 69 having terminal insertion grooves 68 opening upward. Further, these terminal holding portions 69 are formed so that holding grooves 70 and 70 are cut out in a U-shape from the upper edge of the terminal insertion groove 68 so as to face each other along the axial direction of the coil bobbin 63.

[0004] The lead wire drawn from the coil 61
Insert 61e, 61f, 61g through the holding grooves 70, 70
The terminal fitting 72 is inserted into the terminal insertion groove 68 from above, and the lead wires 61e, 61f, 61g are fixed to the terminal holding portion 69 from above, and the lead wires 61e, 61g projecting from the end face of the terminal holding portion 69.
Are cut off by an automatic cutting device (not shown).

The coil 61 is composed of two first and second coils 61a and 61b having different numbers of turns.
Intermediate tap between two first and second coils 61a, 61b
61c. Then, the intermediate tap 61c inserts the lead wire 61e of the first coil 61a wound around the winding drum section 64 into the holding grooves 70, 70 of the terminal holding section 69 and fixes it with the terminal fitting 72. Further, the intermediate tap 61c folds the lead wire 61f derived from the end face of the terminal holding portion 69 along the outer surface of the terminal holding portion 69, winds the lead wire again around the winding drum portion 64, and makes the second coil 61b
And an intermediate tap protruding from the end face of the terminal holding part 69
The lead line 61f of 61c is formed without being cut by an automatic cutting device.

[0006]

However, in the electromagnetic devices shown in FIGS. 9 to 11, the lead wires 61e and 61g derived from the terminal holding portion 69 after the winding of the coil 61 are cut by an automatic cutting device. At this time, the lead wires 61e and 61g derived from some terminal holding parts 69 are cut off, and the lead wires of the intermediate tap 61c are cut.
The cutting work must be performed so as not to cut the 61f. The cutting work of the lead wires 61e, 61f, and 61g is complicated, the productivity is reduced, and the structure of the jig for cutting is complicated. There are problems such as an increase in the size of the device.

On the other hand, since the cutting positions of the lead wires 61e and 61g are different between those having no or a plurality of intermediate taps 61c and those having different outputs, in order to improve cutting efficiency, a cutting jig is required. It is necessary to prepare various.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an electromagnetic device in which a common jig for cutting a lead wire is used, cutting efficiency is improved, and manufacturability is improved. .

[0009]

The electromagnetic device according to the present invention has flange portions at both ends of a winding drum portion around which a coil is wound, and a lead wire from the coil is fixed to the flange portion with terminal fittings. In an electromagnetic device in which an iron core is inserted into a coil bobbin provided with a terminal block, the terminal block of the coil bobbin has a terminal holding portion into which the terminal fitting is inserted and mounted, and a lead wire of the coil penetrating the terminal holding portion. A holding groove formed in a concave shape through which a notch is inserted, and provided on the end face of the terminal holding section so as to intersect the holding groove in a direction substantially orthogonal to the holding groove, and the lead wire is located inside the end face of the terminal holding section. And a guide groove to be inserted.

[0010]

According to the electromagnetic device of the present invention, the lead wire of the coil wound around the winding drum portion is inserted into the holding groove facing the terminal holding portion through the terminal holding portion and pulled out. Since the wire is inserted into the guide groove that intersects the holding groove in the direction orthogonal to the holding groove so as to be inside the end face of the terminal holding part, the lead wire not inserted into the guide groove is cut, and the lead wire inserted into the guide groove is not cut. In addition, only unnecessary lead wires can be easily cut, so that cutting efficiency is improved and manufacturability is improved, and a jig for cutting can be shared.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an electromagnetic apparatus according to the present invention.

1 to 3, reference numeral 1 denotes an electromagnetic device main body of, for example, a discharge lamp ballast. In the electromagnetic device main body 1, an iron core 4 is inserted into a coil bobbin 3 around which a coil 2 is wound. As shown in FIG. 8, the coil 2 includes a first coil 2a and a second coil 2b in series, and an intermediate tap 2c is provided between the first coil 2a and the second coil 2b. Have been.

The coil bobbin 3 is formed with a cylindrical winding drum 11 around which the conductor 2d is wound on the outer peripheral surface and the central leg of the iron core 4 is fitted on the inner peripheral side. Are formed at both ends. In addition, a terminal block 13 is formed on an upper portion of an outer surface of each flange portion 12, respectively.
An iron core fitting base 14 is formed at a lower portion of the outer surface.

On the other hand, each terminal block 13 has a pair of terminal holding portions.
Each of the terminal holding portions 15 is provided with a terminal insertion groove 16 that opens upward.

Then, the terminal insertion groove 16 is provided in FIG.
As shown in FIG. 5, the horizontal cross section is substantially square, and the terminal insertion groove 16 has a concave along the vertical direction in the side direction, that is, at both corners of both inner wall surfaces in a direction orthogonal to the insertion direction of the iron core 4. A groove 17 is provided. A chamfered insertion guide surface 18 is provided on the periphery of the upper end opening of the terminal insertion groove 16 so as to expand upward. Further, at the bottom of the terminal insertion groove 16, a horizontally elongated oval-shaped pedestal 19 is provided so as to protrude upward in the end face direction which is the insertion direction of the iron core 4.

A concave portion 20 is provided on the outer surface of the terminal holding portion 15 in the direction of the end face so as to communicate with the terminal insertion groove 16, and the upper and lower portions capable of holding the lead wires 2e, 2f, 2g of the coil 2 are provided. A holding wall 22 having a holding groove 21 notched in a direction concave is provided. A guide surface 23 that is inclined toward the holding groove 21 is provided above the holding groove 21.

Further, on the outer surface of the terminal holding portion 15 in the direction of the end surface, a guide groove intersecting with the holding groove 21 and communicating with the holding groove 21 at a substantially perpendicular direction to the holding groove 21, that is, in the horizontal direction.
24 are formed. The guide groove 24 is formed wider and deeper than the diameters of the lead wires 2e, 2f, 2g of the coil 2. On the outer surface side of one terminal holding portion 15, a projection 25 facing the holding groove 21 is provided in a protruding manner.

On the other hand, on the inner surface side of the terminal holding portion 15 in the end surface direction, the lead wires 2e, 2 of the coil 2 facing the holding groove of the holding wall are provided.
A guide wall 26 having a holding groove 21 through which f and 2g can be inserted is provided. Further, a recess 27 communicating with the holding groove 21 is provided in the guide wall 26, and a guide surface 28 that is inclined upward is provided above the holding groove 21. In addition, guide portions 29 and 30 are provided on the outside of the concave portion 27 in the side surface direction and at the end portion facing the winding drum portion 11 to smoothly pull out the lead wires 2e, 2f and 2g of the coil 2. A groove 31 communicating with the recess 27 and opening upward is provided.

The iron core 4 is a winding drum of the coil bobbin 3.
Center leg fitted on the inner circumference side of 11 and side legs fitted on both sides
3a, a pair of E-shaped iron cores 36,
Are fitted together from the end face direction.

On the other hand, a self-locking terminal fitting 41 is inserted and mounted in the terminal insertion groove 16 of the coil bobbin 3. As shown in FIG. 7, the terminal fittings 41 are opposed to both side plates 42.
Is formed in a substantially U-shape connected by a bottom plate 43, and a lock plate 44 is bent from the upper portion of one side plate 42 to the lower side of the other side plate 42. The bottom plate 43 of the terminal fitting 41 is provided with a fitting groove 45 that can be fitted to the outside of the pedestal 19 projecting from the bottom of the terminal insertion groove 16 of the terminal holding portion 15. Each side plate 42 is provided with a slit 46 in communication with the side plate. Further, on both sides of each side plate 42, engaging claws 47 having a lower surface side as an inclined surface and an upper surface side as a horizontal surface are provided.

A terminal cover (not shown) that covers the terminal block 13 from above and covers the terminal fittings 41 and the like is provided on both side surfaces and outer end surfaces of each terminal block 13 of the coil bobbin 3. Stop claws 51 and 52 are provided.

Next, the assembling operation of the embodiment will be described.

First, the conductor 2d is wound around the outer peripheral surface of the winding body 11 of the coil bobbin 3, and the coil 2 is wound. That is, the conductor 2d is inserted across the terminal insertion groove 16 into each of the holding grooves 21 and 21 of the one terminal holding portion 15 of the terminal block 13 on one end side facing the holding wall 22 and the guide wall 26, and the terminal holding portion 15 Through the torso 11
Pass to the side. Then, the first coil 2a is wound around the winding drum section 11 by winding a predetermined number of turns.

Next, the lead wire 2f of the first coil 2a is connected to the holding groove 22 of the terminal holding part 15 on the opposite side of the terminal holding part 15 through the lead wire 2e at the beginning of winding. 21, 21,
Insert across the terminal insertion groove 16 and pass through the outer end face side. Then, it is inserted into the guide groove 24 on the outer end surface of the terminal holding portion 15, and the side surface of the terminal holding portion 15 is turned back to form an intermediate tap 2c,
The second coil 2b is wound around the first coil 2a wound around the winding drum section 11 again by a predetermined number of turns, and the second coil 2b is wound.

Further, 2 g of a lead wire at the end of winding of the coil 2
Is inserted across the terminal insertion groove 16 into the holding grooves 22 of the other terminal holding portion 15 and the guide wall 26 of the other terminal holding portion 15 of the terminal block 13 on one end side, and is passed through the outer end face side.

The lead wires 2e, 2f, 2g of the coil 2 through which the terminal holding portion 15 is passed are press-fitted into the holding grooves 21, 21 and clamped, respectively, and each of the recesses 20, the terminal insertion groove 16, the guide groove
25, inserted into the recess 27. In addition, since the guide surfaces 23 and 28 are provided above the holding grooves 21 and 21, the lead wires 2 e, 2 f and 2 g can be easily inserted and can be adapted to automatic winding.

Next, the terminal fittings 41 are inserted from above into the terminal insertion grooves 16 of the terminal holding portions 15 through the lead wires 2e, 2f, 2g. At this time, the side plate 42 obtained by bending the lock plate 44
To the outer end face side. In the process of inserting the terminal fitting 41, the lead wires 2e, 2f, 2g are press-fitted into the slit 46 through the fitting groove 45 of the terminal fitting 41, and the insulating coating on the surface of the lead wires 2e, 2f, 2g is peeled off. To make it electrically conductive.

By inserting the terminal fitting 41, the lead wires 2e,
Even if 2f and 2g are pushed downward, the lead wires 2e, 2f and 2g abut on the upper surface of the pedestal 19 to restrict the downward movement. Pressed into. When the terminal fitting 41 is inserted, the fitting groove 45 of the bottom plate 43 is fitted to the outside of the receiving base 19, and the engaging claws 47 projecting from both sides of the side plate 42 are engaged with the concave groove 17 and Is stopped.

Thereafter, the cutting jig of the automatic cutting device (not shown) is slid on the outer end surfaces of the terminal holding portions 15, 15, and the winding start and end lead wires 2 e derived from the outer end surfaces of the terminal holding portions 15. , Cut 2g. At this time, the lead wire of the intermediate tap 2c
Since 2f is located in the guide groove 24 of the terminal holding portion 15, it is not cut by the cutting jig.

Next, a pair of E-shaped iron cores 36, 36 are fitted and assembled from the end face direction of the coil bobbin 3 to form the E-shaped iron cores 36, 36.
Of the electromagnetic device body 1 by welding
To form

When the main body 1 of the electromagnetic device is used, for example, in a region where the commercial power supply is 50 Hz, the lead wire 2e at the beginning of winding is used.
A lead wire for lighting circuit wiring (not shown) is connected to both terminal fittings 41 of the terminal block 13 on one end side to which the lead wire 2g at the end of the wire is connected. A lead wire is connected to the terminal fitting 41 to which the lead wire 2f of the tap 2c is connected.

On the other hand, to connect the lead wire for lighting circuit wiring, the core wire of the lead wire is inserted from above into the terminal fitting 41, and the tip of the locking plate 44 of the terminal fitting 41 and the locking By press-fitting the tip between the side plate 42 and the opposing side plate 42, the lead wire is crimped between the locking plate 44 and the side plate 42 to be electrically conducted, and the tip of the locking plate 44 is connected to the lead wire. It is bitten into and is retained.

Therefore, according to the above embodiment, the extra lead lines 2e and 2g to be cut are led out from the outer end face of the terminal holding portion 15, and the lead line 2f that is not cut like the intermediate tap 2c is
Cut the extra lead wires 2e and 2g only with a cutting jig that slides the outer end surface of each terminal holding portion 15 into the guide groove 24 on the outer end surface of the terminal holding portion 15. There is no necessity, and only the extra lead wires 2e and 2g can be cut in one operation, so that cutting efficiency is improved and productivity can be improved.

Further, even if the cutting position is different between the electromagnetic device main bodies 1 such as a case where there are a plurality of pairs of terminal holding portions 15 and a plurality of intermediate taps 2c and a case where the intermediate tap 2c is not provided,
It is not necessary to select a cutting position and cut at each cutting position, and the same cutting jig can be used.

In the above embodiment, the terminal holding portion 15
Are described so that the holding grooves 21 and 21 are positioned so that the facing direction of the holding grooves 21 and 21 is along the end face direction of the coil bobbin 3, and each of the terminal blocks 13 is provided with a pair. The same effect can be obtained even when the holding grooves 21 and 21 of the terminal holding portion 15 are formed along the side surface of the coil bobbin 3 so as to face each other.

The terminal fitting 41 is a self-locking terminal fitting.
Although described using 41, for example, one terminal piece of a substantially L-shaped terminal fitting is inserted into the holding groove 31 of the terminal holding portion 15, and the other terminal piece is arranged on the upper surface of the terminal insertion groove 16, and A structure in which a lead wire is connected and fixed to the other terminal piece by screwing or soldering can also be used.

[0037]

According to the electromagnetic apparatus of the present invention, the lead wire of the coil wound around the winding drum portion is inserted into the holding groove facing the terminal holding portion through the terminal holding portion and pulled out. In the case of, since the lead wire is inserted into the guide groove intersecting the holding groove so as to be inside the end face of the terminal holding portion, the lead line not inserted into the guide groove is cut, and the lead line inserted into the guide groove is not cut. Therefore, only unnecessary lead wires can be easily cut, cutting efficiency can be improved, manufacturability can be improved, and a jig for cutting can be shared.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an electromagnetic device of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is an enlarged plan view of the vicinity of the terminal holding unit.

FIG. 5 is a sectional view in the direction of the upper end face.

FIG. 6 is a cross-sectional view in the same side surface direction.

FIG. 7 is a perspective view showing the terminal fitting.

FIG. 8 is a circuit diagram showing the same coil.

FIG. 9 is a plan view showing one embodiment of a conventional electromagnetic device.

FIG. 10 is a side view of the same.

FIG. 11 is a front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic equipment main body 2 Coil 2e, 2f, 2g Lead wire 3 Coil bobbin 4 Iron core 11 Roller body 12 Flange part 13 Terminal block 15 Terminal holding part 16 Terminal insertion groove 21 Holding groove 24 Guide groove 41 Terminal fitting

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01F 27/28 H01F 30/00 H01F 41/06 H01F 41/10

Claims (1)

(57) [Claims] 1. An iron core is inserted into a coil bobbin having a flange at both ends of a winding body on which a coil is wound, and a terminal block on which a lead wire from the coil is fixed with terminal fittings. In the electromagnetic device, the terminal block of the coil bobbin has a terminal holding portion into which the terminal fitting is inserted and mounted, and a notch formed in a concave shape through which the lead wire of the coil is inserted through the terminal holding portion. A holding groove, and a guide groove provided on the end face of the terminal holding portion so as to intersect the holding groove in a direction substantially perpendicular to the holding groove and into which the lead wire is inserted inside the end face of the terminal holding portion. Electromagnetic equipment characterized by the following.