JPS5831386Y2 - Ballast for discharge lamps - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ballast for a discharge lamp, and for example, to a structure for incorporating an external iron type ballast into a lighting fixture using a discharge lamp such as a fluorescent lamp.

Conventional ballasts used in this type of lighting equipment generally have a structure in which laminated cores A are stacked and housed in a case body parallel to the bottom surface, as shown in Figure 3. In the second structure, the cross section of the iron core is limited by the height and lateral width of the lighting fixture, so in ballasts with relatively large capacity, the length of the iron core in the vertical direction, which is the length direction of the fixture body, is limited. Increasing the length of this iron core in the vertical direction increases the magnetic resistance, and the necessary supermagnetic force must also increase accordingly, making it less economical.

The present invention was devised in view of the above-mentioned drawbacks, and the laminated iron core is housed vertically to suppress the widthwise dimension of the ballast body.
To provide an economical ballast for a discharge lamp that can realize a ballast with a relatively large power capacity with a small amount of iron core and copper while suppressing the increase in size due to the chassis of the ballast body.

Next, the structure of one embodiment of the present invention will be explained.

Reference numeral 1 denotes a ballast main body, which is composed of a laminated core 2 and a coil 3, and this laminated core 2 has E-type core pieces 4, 4a made of electrical steel plate arranged vertically as shown in FIGS. 1 and 2. The coils 3 are stacked in parallel in a shape, and the upper and lower leg cores 5 on both sides are butt-joined to each other, and the coils 3 wound around the central leg 6 of the laminated core 2 protrude from both sides of the laminated core 2.

Next, reference numeral 7 denotes a case body that houses the ballast main body 1, and the laminate core 2 is clamped from both sides with approximately the same length in the width direction, which is the lateral direction, of the laminated core 2 of the ballast main body 1. It has a bottom plate part 8 with a width as wide as possible, and side plate parts 9, which are bent perpendicularly from both side edges of the bottom plate part 8 and have the same height as the height of the laminated iron core 2, and the top surface and both end surfaces are open. There is.

The length of the case body 7 in the vertical direction is longer than the length of the laminated iron core 2 of the ballast main body 1 in the vertical direction.

Further, an opening 10 through which the protrusion of the coil 3 is inserted is cut out in the center of the upper edge of both side plates 9, 9 of the case body 7, and the protrusion of the coil 3 is disposed outside the opening 10. The crotch portion 11 is formed by bulging portions 12 that bulge outward on both side plate portions 9°9.

Further, a plurality of tightening protrusions 13 are provided protruding from the upper edges of both side plate portions 9, 9 of the case body 7.

Next, 14 is a case lid body, and the case body 76 is attached to both side edges.
Outside the upper edges of both side plate parts 9, 9* ('overlapping') both side edge pieces 15, 15 are formed, and the tightening protrusions 13 of the front case body 7 are formed on both side edges of the case lid body 14. A retaining portion 16 is provided for insertion and locking.

Reference numeral 17 denotes a terminal block, which is attached to the upper surface of the protruding portion of the laminated core 2 of the coil 3, and has a terminal piece 19 to which the bowed wire 18 of the coil 3 is connected.

Further, stabilizer mounting holes 20 are drilled in both end extensions of the bottom plate portion 8 of the case body 7.

The case body 7 and the stabilizer body 1 constitute a stabilizer body 21.

Reference numeral 22 denotes a device main body formed in a U-shape, the inner width of which is approximately equal to the outer width of the stabilizer body 21, and the stabilizer body 21 is connected to the device main body 22 so that the iron core 2 is in the vertical direction. to fit.

Next, a method of assembling this embodiment will be explained.

First, insert the laminated core piece 4 of the lower half of the ballast body 1 into the upper opening of the case body 7 in a vertical direction parallel to the side plate parts 9, 9 of the case body 7, and then insert the laminated core piece 4 into the upper surface of the case body 7. Piece 4
Insert the terminal block 17 of the coil 3 into the center leg trough 6 of the coil 3 so that it is above the terminal block f.

Furthermore, the laminated core piece 4a of the upper half of the ballast main body 1 is inserted, and the laminated core 2 is housed in both side supports 9,9.

Also, when the ballast main body 1 of this case body 7 is stored, the protruding parts of the coil 3 are the side plate parts? .

Next, the upper opening of the case body 7 is closed with the case lid 14,' by the insertion engagement between the tightening protrusion 13 and the retaining part 16, and the tightening protrusion 13 is folded outward. Bend and tighten the laminated iron core 2 between this case body 14 and the bottom plate part 8 of the low-loss body 7.
To obtain a crow.

Next, in □, the ballast body 21 thus assembled is superimposed on a fixture main body 22 such as a chassis of a lighting fixture so that the laminated core 2 is perpendicular.

Next (comparing the ballast main body 1 shown in Fig. 2 and the conventional ballast using the laminated core A shown in Fig. 3),
The voltage e induced in the ballast is transferred to the inductor '7. Considering that it is only involved in If e2.i = 12) is the same, then the laminated cores shown in FIGS. 3 and 2 will be as follows.

however shows Figure 3, shows FIG.

Even if the ballast is limited in height and width by the lighting equipment, it can be used in the vertical direction (longitudinal direction of the lighting equipment).
Because it is possible to lengthen only the length of
, : and this results in .

That is, compared to the laminated core A shown in FIG. 3, the laminated core 2 shown in FIG. 2 has a center leg center i1 of 5 cr? Sangq S
2 can be made larger, and the magnetic span length t26 can be made smaller to reduce the magnetic resistance. Therefore, the number of turns n2 of the coil 3 can be reduced because less magnetomotive force is required.

Furthermore, since the coil insertion window can be formed into a substantially square shape, the effective utilization rate of the coil insertion window can be improved and scrap of the iron core can be reduced.

Next, to show a specific numerical example of the present invention, in a 30W choke type ballast for a fluorescent lamp, the ballast of the present invention has a lower amount of iron than a conventional ballast.
The amount of copper can be extremely reduced.

According to the present invention, the coil with the laminated core oriented vertically and the coil wound horizontally is inserted into the case body and tightened, so the assembly direction of the ballast body and the direction of insertion into the case body are the same. This simplifies assembly work and allows for continuous assembly.In cases where the height and width of the ballast body are limited by the fixture body, such as a lighting fixture, the vertical direction, which is the longitudinal direction of the fixture body, The length in the direction can be increased, the cross-sectional area of the central leg 6 of the laminated core can be increased, and the magnetic path length can be shortened. Magnetic resistance can be reduced, the required magnetomotive force can be reduced, and the number of coil turns can be reduced. This reduces the amount of iron core and copper, making it economical. It also enables miniaturization without increasing the width of the chassis due to the ballast, and allows for effective use of space in relation to lighting equipment. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a lighting fixture showing an embodiment of the present invention, FIG. 2 is a perspective view of a laminated core of the present invention, and FIG. 3 is a perspective view of a conventional laminated core. 1... Ballast main body, 2... Laminated core,
3...Coil, 7...Case body, 8.
...Bottom plate of case body 7, 12...Coil arrangement part, 21...Stabilizer body, 22...
・The instrument body.

Claims (1)

[Scope of utility model registration request] The ballast body consists of a laminated iron core and a coil wound around the laminated iron core, and a case body having at least a bottom plate part and side plate parts having coil arrangement parts perpendicular to both side edges of the bottom plate part. In this case body, the ballast main body is housed with its laminated core oriented vertically, and a coil that is tightened from both sides thereof and whose winding direction is horizontal, with the laminated core oriented vertically and the laminated core oriented in the width direction. The stabilizer body is housed in the device body such that the laminated core of the stabilizer body is vertical and the width direction is along the longitudinal direction of the device body. Ballast for discharge lamps.