JPH0225223Y2 - - Google Patents

Description

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

<Prior Art> For example, as shown in FIGS. 20 and 21, there is a conventional discharge lamp in which a ballast body 33 is housed in a base 35 and a cover 36 so that the core 34 of the ballast body 33 is sandwiched and tightened from both sides in the stacking direction. As shown in the figure, in the ballast, protrusions 38 are arranged in a row on the base 35 corresponding to the outer magnetic path 37 of the iron core 34, and each protrusion 38 is brought into contact with the laminated end surface of the outer magnetic path 37. In some cases, the iron core 2 is held between the base 35 and the cover 36 in this state, thereby increasing the tightening force on the iron core 2.

<Problems to be solved by the invention> However, in this case, although both widthwise sides of the iron core 34 can be firmly tightened, the yoke portions 39 at both longitudinal ends of the iron core 34 cannot be strongly tightened. This also caused the ballast main body 33 to generate vibrations and loud noises.

In view of the above-mentioned problems, the present invention aims to make it possible to strongly tighten the yokes at both longitudinal ends of the iron core using the base and cover, thereby reducing the vibration and noise of the ballast body. purpose.

<Means for Solving the Problem> The technical means of the present invention for solving this technical problem is a central magnetic path 5, a pair of outer magnetic paths 6 in the width direction, and a longitudinal direction connecting the central magnetic path 5 and the outer magnetic path 6. A ballast main body 1 is provided in which coils 4a and 4b are wound around a central magnetic path 5 of a laminated iron core 2 having a pair of yoke parts 7 in a pair of directions, and the iron core 2 of the ballast main body 1 is In a ballast including a base 14 and a cover 15 that house the ballast main body 1 so as to be clamped and tightened from both sides, one of the cover 15 and the base 14 includes:
It is characterized by the provision of a protrusion 27 that abuts on the yoke portion 7 of the iron core 2 with a small contact surface and holds the iron core 2 between it and the other base 14 or cover 15.

<Example> Hereinafter, the present invention will be described according to the illustrated example. In FIGS. 1 to 7, 1 is a ballast main body, a Japanese letter-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. 8 and 9, 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 connected to the central magnetic path 5 of the iron core 2 via coil bobbins 3a and 3b, respectively.
is wrapped around.

Reference numeral 13 denotes a ballast case that houses the ballast main body 1, and includes a base 14 that pinches and tightens the iron core 2 from both sides in the stacking direction, and a cover 15. base 1
Reference numeral 4 denotes a housing convex portion 16 that protrudes outward in the stacking direction to house the coils 4a and 4b, and a pair of widthwise pressing plates that protrudes outward in the width direction from the housing convex portion 16 along the lower surface of the outer magnetic path 6. portion 17 and a bent edge portion 18 at the outer end in the width direction that is bent from the pressing plate portion 17 . The cover 15 includes a storage convex portion 20 that projects outward in the stacking direction to store the coils 4a and 4b, and an outer magnetic path 6.
A pair of widthwise pressing plate portions 21 protrude outward in the widthwise direction from the storage convex portion 20 along the upper surface of the press plate portion 21 .
A pair of side walls 22 in the width direction are provided on the base 14 side along the outer end surface of the outer magnetic path 6 so as to overlap the bent edges 18 thereof. Closing walls 23 are provided at both longitudinal ends of the storage convex portion 20 and protrude toward the yoke portion 7 so as to close both longitudinal ends of the convex portion 20 . The cover 15 is attached to the bent edge 18 of the base 14 by bending the claw 24 protruding from the side wall 22.
By engaging the base 14 and the cover 1
Base 1 with ballast body 1 sandwiched between 5 and 5.
It is fixed at 4.

Reference numeral 26 denotes a projection formed on each pressing plate portion 17 of the base 14 so as to protrude upward. A plurality of projections 26 are arranged in a row in the longitudinal direction of the pressing plate portion 17, and the pressing plate portion 17 It is pressed into contact with the outer magnetic path 6 of No. 2. Reference numeral 27 denotes a pair of protrusions provided on the cover 15. A pair of protrusions are provided downwardly on each of the closing walls 23 of the cover 15, and the cover 15 presses into contact with the yoke portion 7 of the iron core 2 through the protrusions 27 with a small contact surface. ing. Thus, the protrusions 26 of the base 14 can strongly tighten the outer magnetic path 6 portions at both outer ends of the core 2 in the width direction with the cover 15, and the protrusions 27 of the cover 15
As a result, the yoke portions 7 at both longitudinally outer ends of the iron core 2 can be strongly tightened with the base 14.

10 to 15 show another embodiment, in which the base 14 has a storage convex portion 16, a pair of pressing plate portions 17 in the width direction, and a base 14 that protrudes from the pressing plate portion 17 along the outer end surface of the outer magnetic path 6. The cover 15 has a pair of side walls 30 in the width direction; A claw 24 protruding from the portion 30
By bending and engaging the bent edge 31, the ballast body 1 is fixed to the base 16 with the ballast main body 1 sandwiched between the base 14 and the cover 15.
Similarly to the embodiment described above, a protrusion 26 that presses into contact with the outer magnetic path 6 of the iron core 2 is attached to the pressing plate portion 17 of the base 14.
are arranged in a row, and a protrusion 27 is provided on the closing wall 23 of the cover 15 to press against the yoke part 7 of the iron core 2. In other respects, the configuration is similar to that of the previous embodiment.

In the above embodiment, the ballast main body 1 has the primary coil 4a and the secondary coil 4b, but instead of this, the ballast main body 1 has the coil 4 as shown in FIG. 16 or 17. It may have only one. Further, in the embodiment described above, the protrusion 2 is provided on the cover 15.
7 and a protrusion 26 is provided on the base 14, but as shown in FIG. 18 or 19, the base 14
Alternatively, the protrusion 26 may not be provided, and the protrusion 27 may be provided only on the cover 15, so that the base 14 contacts the outer magnetic path 6 of the iron core 2 on the upper surface of the press plate portion 17. Furthermore, the laminated core 2 is not limited to a combination of a pair of E-type core and I-type core in a Japanese character shape as shown in FIG. It may also be a combination. Further, in the embodiment described above, the protrusion 27 is provided on the cover 15, but the base 1
It is also possible to provide a protrusion 27 on the base 14 side that presses into contact with the yoke portion 7 of the iron core 2 by providing a closure wall similar to the closure wall 23 of the cover 15 on the base 14 .

<Effects of the invention> According to the invention, one of the cover 15 or the base 14 is in contact with the yoke part 7 of the iron core 2 with a small contact surface, and the iron core 2 is held between the other base 14 or the cover 15. Since the gripping protrusion 27 is provided, the cover 1
It becomes possible to strongly tighten the yoke portions 7 at both longitudinal ends of the iron core 2 between the ballast 5 and the base 14, and the generation of vibration and noise in the ballast main body 1 can be significantly reduced. Moreover, it has a very simple structure in which only the protrusion 27 is provided, so it is easy to manufacture and can be provided at low cost, and its practical effects are significant.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
The drawings 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 A of Fig. 4. 8 is a plan view of the main body of the ballast, FIG. 9 is a perspective view of the main body of the ballast, FIG. 10 is a plan view showing another embodiment, and FIG. 11 is a plan view of the ballast main body. 12 is a front view of the same, FIG. 13 is a sectional view of the same side, FIG. 14 is a front sectional view of the same, FIG. 15 is a sectional view taken along the line B-B of FIG. 17 is a side sectional view showing other embodiments, FIGS. 18 and 19 are front sectional views showing other embodiments, FIG. 20 is a front sectional view showing the conventional example, and FIG. 21 is a front sectional view showing the same example. It is an exploded perspective view. 1... Ballast main body, 2... Laminated core, 4a...
Primary coil, 4b...Secondary coil, 5...Central magnetic path, 6...Outer magnetic path, 7...Yoke part, 14...Base, 15...Cover, 27...Protrusion.

Claims (1)

[Scope of utility model registration request] Coils 4a, 4b, and a base 14 and a cover 15 for storing 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. In the ballast, one of the cover 15 or the base 14 is provided with a protrusion 27 that contacts the yoke part 7 of the iron core 2 with a small contact surface and holds the iron core 2 between the other base 14 or the cover 15. A stabilizer characterized by: