JPH027455Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a ballast in which a ballast body is housed in a case so that iron cores are sandwiched and tightened from both sides in the stacking direction.

<Prior art> For example, in a ballast for a discharge lamp, as shown in FIG. 29, a case 103 having a base 101 and a cover 102 is used to secure the ballast by sandwiching and tightening the iron core 105 of the ballast main body 104 from both sides in the stacking direction. Some ballasts have a housing body 104, but in conventional ballasts of this type, both ends of the case 103 in the longitudinal direction are open as shown in the same figure (for example, the case 103 is open at both ends in the longitudinal direction).
23871).

<Problems to be solved by the invention> Therefore, it is effective to fill the ballast main body 104 with a compound in order to suppress the temperature rise of the ballast and reduce noise, but the case 103
The compound injected into the case 103 leaked from both longitudinal ends of the case 103, making it difficult to fill the case 103 with the compound. For this reason, the ballast main body 104 is generally hardened with varnish, which causes a large temperature rise and generates large noise.

In view of the above-mentioned problems, the present invention has been developed so that the main body of the ballast can be easily filled with a compound and the temperature rise and noise can be effectively suppressed.

(Means for solving the problem) The technical means of the present invention for solving this technical problem is that the central magnetic path of the laminated iron core 2 has a central magnetic path 5 and a pair of outer magnetic paths 6 in the width direction. 5, coil bobbin 3
The stabilizer body 1 includes a ballast body 1 formed by winding coils 4a and 4b through coils 4a and 3b.
and a case 13 for storing the stabilizer main body 1 so as to sandwich and tighten the iron core 2 from both sides in the stacking direction, and the stabilizer main body 1 is provided with terminals 41, 42, 43,
44 is provided to protrude outward, and the terminals 41, 42, 43,
Terminal covers 52 and 53 are provided for storing and protecting the coils 44, and the case 13 has a storage convex portion 16 that projects outward in the stacking direction to accommodate the coils 4a and 4b that project from the outer end surface of the iron core 2 in the stacking direction. In the ballast provided with a pair of widthwise pressing plate portions 17 protruding outward in the width direction from the storage convex portion 16 along the outer magnetic path 6, the coil bobbins 3a, 3b are provided with storage at the outer ends in the longitudinal direction. Flange portions 10 are provided so as to close both sides in the longitudinal direction of the convex portion 16, and a compound 27 is filled between these collar portions 10 so as to close the space between the case 13 and the ballast main body 1, and the terminal cover 52, 53 is characterized in that wedge portions 63 and 64 are provided which are fitted between the collar portion 10 and the storage convex portion 16.

<Function> When the compound 27 is injected into the housing convex portion 16 of the case 13, the compound 27 is prevented from leaking from the housing convex portion 16 outward in the longitudinal direction by the collar portion 10 and the wedge portions 63, 64. , the compound 27 can be easily and reliably filled so as to close the space between the case 13 and the stabilizer body 1.

<Embodiment> Hereinafter, the present invention will be explained according to the illustrated embodiment. In FIGS. 1 to 6, 1 is a ballast main body, a Japanese character-shaped laminated core 2, and a pair of coil bobbins 3a, 3b. , the primary coil 4a and the secondary coil 4
b. The iron core 2 is formed in a Japanese character shape as shown in FIGS. 7 and 8, and has a central magnetic path 5, a pair of outer magnetic paths 6 in the width direction, and a pair of yoke parts 7 in the longitudinal direction. The primary coil 4a and the secondary coil 4b are wound around the central magnetic path 5 of the iron core 2 via coil bobbins 3a and 3b, respectively. As shown in FIG. 9, the coil bobbins 3a, 3b have a rectangular cylindrical body 8 that fits around the central magnetic path 5, and a pair of flanges 9, 10 that protrude radially from both ends of the body 8.

Reference numeral 13 denotes a ballast case that houses the ballast main body 1, and includes a base 14 and a cover 15 that sandwich and tighten the iron core 2 from both sides in the stacking direction. base 14
As shown in FIG. 10, there is a storage convex portion 1 projecting outward in the stacking direction so as to store the coils 4a and 4b.
6, and a pair of widthwise pressing plate portions 17 protruding outward in the width direction from the storage convex portion 16 along the lower surface of the outer magnetic path 6.
and a bent edge 18 at the outer end in the width direction which is bent from the pressing plate part 17. The cover 15 has the coil 4a,
a housing convex portion 20 that protrudes outward in the stacking direction so as to store the magnetic flux 4b; a pair of widthwise pressing plate portions 21 that protrudes outward in the width direction from the housing convex portion 20 along the upper surface of the outer magnetic path 6; A pair of side wall portions 22 in the width direction protrude from the pressing plate portion 21 toward the base 14 along the outer end surface of the outer magnetic path 6 so as to overlap the bent edge portion 18 thereof. Closing walls 23 that protrude toward the yoke portion 7 are provided at both longitudinal ends of the storage convex portion 20 so as to close both longitudinal ends of the convex portion 20 . The cover 15 is constructed by bending the claws 24 protruding from the side wall 22 and engaging the bent edges 18 of the base 14, so that the ballast main body 1 can be held between the base 14 and the cover 15. It is fixed to the base 14.

Flange portion 10 at the outer end of the coil bobbin 3a, 3b
As shown in FIG. 9, the height F and width E are larger than the height F' and width E' of the inner end flange 9, and each of the storage protrusions 16, 20 of the base 14 and cover 15
Both sides of the longitudinal direction are closed tightly. Reference numeral 26 designates injection holes for compound injection provided in the longitudinal center of the base 14, and a pair of injection holes 26 are formed corresponding to intermediate positions between the bobbins 3a and 3b, as shown in FIGS. 11 and 12. 28 is a rectangular plate-shaped insulating paper,
It is interposed between the coils 4a, 4b and the storage convex portion 20 of the cover 15. 29 is the coil 4a, 4b
and the storage convex portion 16 of the base 14, and the insulating paper 29 has first
As shown in FIG. 0, FIG. 13, and FIG. The insulating paper 29 is engaged with the arcuately curved locking piece 35, thereby positioning and fixing the insulating paper 29 along the bottom wall of the storage projection 20. Further, as shown in FIGS. 10 to 13, the insulating paper 29 is provided with a pair of leak-preventing valves 36 corresponding to the injection holes 26, and each valve 36 is a circular plate-shaped blocker larger than the injection hole 26. The piece 37 and the closing piece 37 are covered with insulating paper 2.
9, the valve 36 closes the injection hole 26 with a closing piece 37 by elastic deformation of the connecting piece 38, etc. so that the injection hole 26 can be opened and closed. Then, as shown in FIGS. 11 and 12, a resin press-fitting jig 39 is inserted through the injection hole 26, and the jig 3
9 presses the valve 36 inward to open the injection hole 26 while injecting the compound 27 into the case 13.
The case 13 is filled so as to prevent leakage between 0 and 10 and close the space between the base 14 and the cover 15 and the stabilizer main body 1. and compound 2
After injection of 7, the internal pressure of the case 13 closes the valve 3.
6 is pressed against the opening edge of the injection hole 26 so as to close the injection hole 26.

Terminals 41, 42, 43, 44 of ballast body 1
As shown in FIGS. 7 and 15 to 17, the terminals 41 are provided with a pair of terminal mounting pieces 45 integrally provided on the flanges 10, 10, respectively, projecting outwardly. It has a clamping piece 46 and a coil 4a,
Connection piece 48 for winding and connecting the coil ends of 4b
is cut and formed. Terminals 42, 43, 44
have the same configuration as each other, and the connecting pieces 49,
50 is cut and formed. Reference numerals 52 and 53 designate terminal covers, which have holding recesses 54, 55, 56, and 57 that house and hold the terminals 41, 42, 43, and 44, and holding recesses 54 and 5, as shown in FIGS.
Openings 58, 59, 60, 6 communicating with 5, 56
1 and a cylindrical hole 62. Also, the terminal cover 5
2 and 53 are a pair of wedge portions 63 and 64 in the width direction.
and a pair of plate pieces 65 and 66 in the width direction. Each holding recess 54, 55, 56, 57 has a
As shown in FIGS. 15, 17, 19, and 25, a stepped portion 67 is provided, and a plurality of rectangular parallelepiped-shaped inner protrusions 68 are provided, and each terminal 41, 4
2, 43, and 44 are bent so as to follow the stepped portion 67, and are brought into contact with or close to the inner protrusion 68 so that the two-folded tip portions are in surface contact with the inner protrusion 68. The holding part 46 of the terminal 41 is located at a position corresponding to the cylindrical hole part 62 as shown in FIG.
The locking pieces 35 are located between the plate pieces 5 and 66. As shown in FIG. 16, the wedge portions 63 and 64 are fitted between the side wall 16b of the storage convex portion 16 and the flange portion 10 so as to close the space between the two. It is completely leak-tight to prevent it from leaking to the outside. At the lower corners of the terminal covers 52 and 53, as shown in FIGS. 16, 19, and 25, there are cutouts formed to avoid the radius between the bottom wall 6a and the side wall 6b of the storage projection 16. A portion 70 is provided so that the covers 52 and 53 can be brought into close contact with the base 14. Both longitudinal ends of the insulating paper 29 are stacked on the lower surfaces of the plate pieces 65, 66 of the terminal covers 52, 53, as shown in FIG.

Reference numeral 72 denotes a power terminal block, which has storage portions 73, 74, a through hole 75, and a pair of locking recesses 76 in the width direction, as shown in FIGS. 15, 18, 19, 20, and 24. . Terminal screws 77, 78 and terminal fittings 79, 80 are stored in the storage parts 73, 74,
Each terminal screw 77, 78 has a square holding plate 81, 8.
2 are screwed together, and the holding plates 81 and 82 can be adjusted up and down by rotating the terminal screws 77 and 78. A fitting protrusion 83 is provided on the power terminal block 72 to project downward, and the fitting protrusion 83 is removably fitted into the fitting recess 84 of the terminal cover 52, so that the power terminal block 72 is attached to the terminal cover 52.
It is placed in a polymeric manner against the Terminal fitting 79
is integrally provided with a clamping piece 85, and this clamping piece 8
Both ends of the fuse 86 are removably held between the terminal fitting 79 and the holding piece 46, respectively.
and the terminal 41. Further, a connection key 87 is integrally provided on the terminal fitting 80, and the key 87 protrudes downward from the through hole 75 to connect the terminal 4.
2, thereby connecting the terminal 42 and the terminal fitting 80. A pair of side wall portions 22 in the width direction of the cover 15 are provided with cut and raised pieces respectively cut and formed as shown in FIG.
The tip of the cut-and-raised piece 8 is engaged with the locking recess 76.
A power terminal block 72 is clamped and fixed between the terminals 9 and 9.

Note that the pressing plate portion 21 of the cover 15 is bent into a waveform as shown in FIG. 26, thereby not only reinforcing the cover 15 but also effectively reducing the noise of the ballast. Further, a lid body having a screwdriver insertion hole for rotating the terminal screws 77 and 78 is detachably attached to the power terminal block 72 so as to close the upper end opening.

FIG. 27 is a circuit diagram showing the connection of the ballast main body 1 and the fuse 86 to a power source and a discharge lamp. In the figure, 91 is an AC power source and 92 is a discharge lamp. Note that the terminal 44 is provided for internal wiring.

FIG. 28 shows a modification of the terminal and terminal cover portion, in which the tip end of the terminal 41 is brought into contact with or close to the stepped portion 67 in surface contact.

<Effects of the invention> According to the invention, the flanges 10 are provided at the outer ends of the coil bobbins 3a and 3b in the longitudinal direction so as to close both longitudinal sides of the storage convex portion 16 of the case 13. The compound 27 injected into the storage convex portion 16 can be prevented from leaking by the flange 10. Therefore, the compound 27 can be easily and reliably filled between the case 13 and the ballast main body 1, and the ballast The temperature rise of the main body 1 and the generation of noise can be effectively suppressed. Moreover, since the terminal covers 52 and 53 are provided with wedge portions 63 and 64 that are fitted between the flange portion 10 and the storage convex portion 16, the wedge portions 63 and 64 connect the flange portion 10 and the storage convex portion 16. The space between the compound 2 and the compound 2 can be sealed.
7 can be ensured, and there is no need to directly seal both sides of the storage projection 16 in the longitudinal direction with the flange 10. Therefore, precision is not required for the flange 10, and manufacturing is simplified. Stabilizer body 1
When assembling the stabilizer body 1 into the case 13, there is no fear that the flange portion 10 is too large for the storage convex portion 16, making it difficult to assemble the stabilizer body 1, and the practical effect thereof is significant.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
The figures are the same side view, Fig. 3 is the bottom view, Fig. 4 is the front view, Fig. 5 is the same side sectional view, Fig. 6 is the same front sectional view, and Fig. 7 is the ballast main body part. Bottom view, Figure 8 is a perspective view of the main body of the ballast, Figure 9 is a perspective view of the coil bobbin, Figure 10 is a plan view of the base and insulating paper, and Figure 11 is an enlarged view of the base. A front sectional view, a sectional view taken along the line A-A in FIG. 12 and FIG. 3, and FIG. 13 are a plan view of the insulating paper. 14 is a sectional view taken along the line B-B in FIG. 3, FIG. 15 is an enlarged side sectional view, FIG. 16 is an enlarged bottom view of the terminal cover portion, and FIG. 17 is a plan view of the terminal portion. Figure 18 is a plan view of the power terminal block, and Figure 19 is the 18th
Figure 20 is a sectional view taken along the line C-C, and Figure 20 is the line D-
A sectional view taken along line D, and FIG. 21 a plan view of the terminal cover.
Fig. 22 is a front view of the same terminal cover, Fig. 23 is a plan view of another terminal cover, Fig. 24 is a bottom view of the same power terminal block, and Fig. 25 is a cross section taken along line E-E in Fig. 15. Figure 26 is a sectional view taken along the line FF in Figure 1, Figure 27 is the same circuit diagram, Figure 28 is a side sectional view showing a modified example of the terminal and terminal cover portion, and Figure 29 is a conventional example. FIG. 1... Ballast main body, 2... Laminated core, 3a, 3
b...Coil bobbin, 4a, 4b...Coil, 5
... Central magnetic path, 6 ... Outer magnetic path, 10 ... Flange, 1
3...Case, 16...Storage convex portion, 17...Press plate portion, 27...Compound, 41, 42, 4
3, 44... terminal, 52, 53... terminal cover,
63, 64...Wedge part.

Claims (1)

[Scope of utility model registration request] Coil bobbin 3a,
A case that includes a stabilizer body 1 formed by winding coils 4a and 4b through coils 3b, and houses the stabilizer body 1 so as to sandwich and tighten the iron core 2 of the stabilizer body 1 from both sides in the stacking direction. 13, terminals 41, 42, 43, 44 are provided to protrude outward from the ballast main body 1, and terminal covers 52, 53 are provided for housing and protecting the terminals 41, 42, 43, 44,
The case 13 includes a storage convex portion 16 that protrudes outward in the lamination direction to accommodate the coils 4a and 4b protruding from the outer end surface of the iron core 2 in the lamination direction, and a width extending from the storage convex portion 16 along the outer magnetic path 6. In the ballast provided with a pair of widthwise pressing plate parts 17 projecting outward in the direction, a flange part 10 is provided at the longitudinally outer end of the coil bobbins 3a, 3b so as to close both longitudinally sides of the storage convex part 16. A compound 27 is filled between these flanges 10 so as to close the space between the case 13 and the ballast main body 1, and the terminal cover 52,
53 is provided with wedge parts 63 and 64 that are fitted between the collar part 10 and the storage convex part 16.