JP2000357618A - Ballast for discharging lamp and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a ballast for discharging lamp in which variations of characteristics can be reduced and noise can be reduced without requiring a vibration-proof means employing adhesive. SOLUTION: The ballast body 11 fixed in a case body defined by a bottom plate and a case caulked thereto has a pair of E type laminate cores 15 having side legs 22 abutting each other. Recesses (press part receivers) 23 are provided at the corners of the side legs 22 of both cores 15 on the side opposite to the forward end face 22a thereof. A bead (core pressing part) 35 projecting to the backside of the side plate part 33 of a case being stacked on the outer surface 15b of the side leg is formed integrally with the side plate part. When the case body is assembled, each bead 35 is engaged in each recess 23 in order to press both cores 15 in the abutting direction. According to the structure, the forward end faces 22a of the side legs 22 of both cores 15 are abutted strongly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp ballast used for lighting a discharge lamp such as a fluorescent lamp, and a lighting fixture provided with the ballast.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 6-120058 describes a discharge lamp ballast in which a ballast body is mounted in a case body. The ballast body is formed by abutting a pair of E-shaped laminated iron cores with the ends of their side legs, and fitting a coil bobbin to the central leg of these iron cores.
A coil is wound around the outer periphery of the coil bobbin. The case body is formed of a bottom plate attached to a chassis (apparatus main body) of the lighting fixture, and a case connected to the bottom plate and covering the periphery of the ballast main body.

[0003] This discharge lamp ballast is assembled by supporting the ballast body over a pair of overhangs of the bottom plate, and then winding and caulking the connecting end of the case to the back side of the overhang. At the same time that the case body is assembled by this assembly, the side legs of the E-shaped laminated iron core are sandwiched between the shoulders of the case and the overhanging portion of the case body in the stacking direction, and the flat cover side plate of the case is E-shaped. The ballast body is fixed in the case body by making surface contact with the outer surface of the side leg (the side leg surface farther from the center leg) of the mold laminated core.

[0004] In the discharge lamp ballast thus assembled, the pair of E-shaped laminated iron cores are abutted against each other by a force between the shoulder portion and the overhanging portion in which the side legs are sandwiched in the stacking direction and an E side of the cover side plate portion.
It is held depending on the force that comes into close contact with the outer surface of the side leg of the mold laminated core. However, hitherto, no attempt has been made to actively strengthen the matching.

[0005] Therefore, there is a possibility that the proper butting of the pair of E-shaped laminated iron cores may be weakened due to a strong impact during the manufacturing process or the like, or due to vibration of the tip of the side leg due to energization in the performance test. Yes, especially when swaging is insufficient. Then, when a poor matching occurs in this way, the magnetic resistance at the butting surface of the side legs forming the magnetic path increases, the characteristics of the discharge lamp ballast vary, and the tip of the side legs is restrained from moving. As the force is reduced and the tip is more likely to vibrate under the influence of the magnetic field, the quality is reduced, such as increased noise.

Conventionally, in order to suppress noise, an adhesive is injected into a gap between an outer peripheral surface of a coil wound around a coil bobbin and a tip of a side leg where a pair of E-shaped laminated cores abut. As a result, vibration of the tip of the side leg is also prevented. However, taking such anti-vibration means increases the time and labor required for manufacturing, and therefore, improvement is desired.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge lamp ballast capable of reducing variations in characteristics and reducing noise without using an anti-vibration means using an adhesive, and a lighting fixture having the same. Is to get

[0008]

According to a first aspect of the present invention, there is provided a discharge lamp ballast having a central leg and a pair of side legs, the ballast being opposite to the tip of the side leg. A pair of E-shaped laminated iron cores formed by providing pressing portion receivers at the corners and joined by abutting the tips of the side legs, and a coil bobbin around which a coil is wound and fitted to the central leg And a bottom plate that supports a ballast body formed with the coil bobbin and the pair of E-shaped laminated cores, and a bottom plate that is supported by the bottom plate. A cover side plate portion facing the ballast body, a shoulder portion connected to the cover side plate portion and holding the side leg between the overhang portion, a connection end portion wound around the overhang portion on the back side thereof and caulked; Back side of the cover side plate A case that has a core pressing portion that is provided to protrude and engages with the pressing portion receiver and presses the pair of E-shaped laminated cores in the butting direction, and forms a case body with the bottom plate. It is characterized by.

In the present invention and each of the following inventions, a choke coil type or a leakage transformer type can be used for the ballast body. The pressing portion receiver of the E-shaped laminated iron core can be formed by a concave portion as in the invention of claim 2, and a corner portion opposite to the tip of the side leg, that is,
The end face of the corner portion sandwiched between the end face of the E-shaped laminated core and the outer face of the side leg may be used. When the pressing portion receiver is formed of a concave portion formed over the end surface and the outer surface of the side leg, the bottom surface of the concave portion may be an arc surface or an inclined surface. The core pressing portion of the cover side plate portion that engages with the pressing portion receiver is configured to protrude from the root so that a component force in a direction perpendicular to the protruding direction is applied in the butting direction of the E-shaped laminated core with the engagement with the pressing portion receiver. It is desirable that the shape be gradually tapered.
Also, the core pressing portion may be formed by bulging a part of the cover side plate portion to the back side, or may be formed by cutting and raising a part of the cover side plate portion. Can be formed by bending the edge of the rear side.

[0010] The ballast for discharge lamp of the present invention is assembled by winding and caulking the connection end of the case to the back side of the overhang while supporting the ballast body over the pair of overhangs of the bottom plate. With this assembly, the shoulder of the case and the overhang of the bottom plate sandwich the side legs of the E-shaped laminated core from the stacking direction, and the cover side plate of the case is positioned on the outer surface of the side legs of the E-shaped laminated core (far from the center leg). The ballast body is fixed in the case body by surface contact with the side leg surface of the ballast. And at this time,
An iron core pressing portion protruding from the back surface of the cover side plate portion engages with a pressing portion receiver of the E-shaped laminated core. Accordingly, a pair of E-shaped laminated iron cores are pressed in the butting direction, and these E-shaped laminated iron cores are pressed.
Since the butting of the mold-laminated cores is positively strengthened, it is possible to prevent the occurrence of poor butting between the pair of E-shaped laminated cores. Therefore, variation in the characteristics of the discharge lamp ballast can be reduced, and vibration can be prevented at the tip of the side leg without injecting an adhesive for suppressing vibration, thereby suppressing noise. Also, since the pressing portion receiver is provided at the corner opposite to the tip end surface of the side leg of the E-shaped laminated core, the effective magnetic path cross-sectional area of the E-shaped laminated core is not reduced by this pressing portion receiving,
There is no loss of characteristics.

According to a third aspect of the present invention, in the discharge lamp ballast, the pitch between the pair of core pressing portions of the cover side plate portion is set between the pressing portion receivers positioned in the direction in which the pair of E-shaped laminated cores are arranged. Characterized in that the pitch is smaller than the pitch.

Due to such a pitch relationship, when the core pressing portion of the cover side plate portion engages with the pressing portion receiver of the E-shaped laminated core with the assembly of the cover body, the pair of E-shaped laminated cores are securely connected to each other. By pressing in the butting direction, the butting of these E-shaped laminated cores can be positively strengthened.

According to a fourth aspect of the present invention, in the discharge lamp ballast, the length of the core pressing portion is made equal to the thickness of the E-shaped laminated core, and both ends of the core pressing portion in the longitudinal direction are respectively set to the length. It is characterized in that it is formed by a cut surface that comes into contact with the overhang portion and the shoulder portion.

Both ends in the longitudinal direction of the iron core pressing portion protruding from the back surface of the case side plate portion abut against the projecting portion of the bottom plate and the shoulder portion of the case, respectively, so that the pressing portion is located between the projecting portion and the shoulder portion. It becomes a stopper to be sandwiched. Therefore, it is possible to prevent the overhang portion and the shoulder portion from excessively strongly sandwiching the side legs of the E-shaped laminated core and deforming the E-shaped laminated core.

According to a fifth aspect of the present invention, there is provided a lighting apparatus, wherein the apparatus body, a discharge lamp mounted on the apparatus body via a lamp holder, and the lighting apparatus connected to the discharge lamp and mounted on the apparatus main body. Any one of items 1-4
And a discharge lamp stabilizer according to the item (1).

Due to the engagement between the core pressing portion protruding from the rear surface of the cover side plate portion and the pressing portion receiver of the E-shaped laminated core, variations in characteristics are small, and noise is reduced without the need for an anti-vibration means using an adhesive. Since the discharge lamp ballast that can be reduced is provided, a high-quality lighting fixture can be provided.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side view partially showing the configuration of a lighting apparatus according to an embodiment. Reference numeral 1 denotes a circular apparatus main body directly mounted on a ceiling surface (not shown), the center of which is shown in FIG. The hook ceiling 2 is passed through the portion. A ring-shaped fluorescent lamp 4 (only one is shown) as a discharge lamp is detachably supported on the appliance body 1 via a lamp holder 3. Furthermore, a lighting tube 5 is provided inside the fixture body 4 inside each ring-shaped fluorescent lamp 4 with a lighting tube socket 6.
And a discharge lamp ballast 7 is mounted. Also, a light-diffusing and transparent shade 8 is removably mounted on the instrument body 11 so as to cover the fluorescent lamp 4 and other electric components and the like.

Next, a discharge lamp ballast 7 electrically connected to the fluorescent lamp 4 for lighting the lamp 4 will be described with reference to FIGS.

The discharge lamp ballast 7 is of a choke coil type, and includes a ballast body 11 and a case body 12 which houses and fixes the body 11. The ballast body 11 includes a coil bobbin 14 around which a coil 13 is wound, and a pair of E-shaped laminated cores 15 combined with the bobbin 14. The case body 12 is formed by combining a bottom plate 16 and a case 17.

The coil bobbin 14 made of synthetic resin has a rectangular cylindrical through hole 14a, and a plurality of terminal fittings 14b protrude from one flange outer surface. Electric wires (not shown) are connected to the metal fittings 14b, and terminals of the coil 13 are connected to the metal fittings 14b.

Each of the E-shaped laminated iron cores 15 is formed by laminating a large number of iron core plates 15c shown in FIG.
4 (B) and the like. This laminated core 15
Has an E-shape with a pair of side legs 22 provided on both sides of the center leg 21. These legs 21 and 22 are provided in parallel with each other, and the central leg 21 is thicker than the side legs 22,
The side legs 22 are slightly longer than the center leg 21. And FIG.
As shown in FIG. 5, a pair of E-shaped laminated cores 15 are combined by abutting the end surfaces 22a of the side legs 22 with each other.

The pair of E-shaped laminated iron cores 15 have a corner opposite to the tip of the side leg 22, that is, the end face 15 a of the E-shaped laminated iron core 15 and the central leg of the side leg 22. At both corners sandwiched between the side leg outer surfaces 15b.
A concave portion 23 is formed as a receiving portion of the pressing portion extending over the portions a and 15b. The bottom surfaces of these recesses 23 are arc-shaped. As shown in FIG. 4A, the shortest distance E between the bottom surface of the concave portion 23 and the inner end of the base of the side leg 22 is equal to the length of the side leg 22.
Larger than or equal to the width F. This is possible because the recess 23 is provided in the corner.
Thereby, the effective magnetic path cross-sectional area is prevented from becoming small on the root side of the side leg 22.

The coil bobbin 14 has a fitting hole 14a.
Are fitted to the center legs 21 of the two E-shaped laminated cores 15 so that the ballast body 11 as shown in FIG.
Are formed together with a pair of E-shaped laminated iron cores 15.

As shown in FIG. 2 and FIG.
Is formed from a metal plate having a relatively large thickness and a high strength in a concave groove shape, and has a pair of overhang portions 25 at a central portion in the longitudinal direction. Each of the overhanging portions 25 is horizontally extended outwardly, and a crimped edge 25a is bent downward at FIG. Mounting holes 26 are formed at both ends in the longitudinal direction of the bottom plate 16, and the bottom plate 16 can be mounted on the inner surface of the instrument body 1 through a fixing tool such as a screwing bed (not shown) passing therethrough. ing.

As shown in FIGS. 2 and 3, the case 17 made of a metal plate thinner than the bottom plate 16 has a cover side plate portion 33 which is formed by bending shoulder portions 32 formed on both sides of a top plate 31. It is formed integrally. At the tip of the cover side plate portion 33, a plurality of connecting ends 34 for caulking are provided at predetermined intervals. Further, each of the cover side plate portions 33 is provided with a pair of beads 35 as a pair of iron core pressing portions projecting from the back surface thereof.

These beads 35 are formed by pressing to extend in the height direction of the cover side plate portion 33. And the length A of each bead 35 is the E-shaped laminated core 15
, And both ends in the longitudinal direction are formed by cut surfaces that abut against the overhang portion 25 or the shoulder portion 32. Therefore, each bead 35 is provided with a pair of slit-shaped cuts provided in advance in a metal plate as a raw material at intervals of a bead length A, and in this state, the gap between these slits is formed on the rear side of the cover side plate portion 33. It is formed by applying a press process to swell the surface. As shown in FIG. 5, the pitch C between the pair of beads 35 formed on the cover side plate portion 33 is the pitch D between the pair of recesses 23 located in the long-day direction of the pair of E-shaped laminated cores 15. It is set slightly smaller.

Next, the assembly of the discharge lamp ballast 7 will be described. First, the ballast body 11 is assembled. The main body 11 includes a coil bobbin 1 around which a coil 13 is wound.
4 from both sides of the bobbin 14 into the through holes 14a.
The assembly is completed by inserting the central leg 21 of the laminated core 15, and the assembly is completed when the tip surfaces 22 a of the side legs 22 of both the E-shaped laminated cores 15 abut against each other. The assembled ballast body 11 is shown in FIG.

Thereafter, the ballast body 11 is arranged over the overhang 25 of the bottom plate 16. With this arrangement, the lower surfaces of the side legs 22 of both the E-shaped laminated cores 15 are placed on the overhang portions 25.

Next, the case 17 is combined with the bottom plate 16 so as to cover the periphery of the ballast body 11 on the bottom plate 16, and the case 17 is caulked to the bottom plate 16. FIG. 6 shows a combination state immediately before the crimping in this case. As shown in FIG. 6, the caulking stopper deforms the connecting end 34 of the case 17 so as to be rolled into the back side of the caulking edge 25 a of the overhang portion 25, and connects these connecting ends 34 to the front and back of the caulking edge 25 a. It is realized by caulking so that it is clamped. The case body 12 is assembled with the ballast body 11 housed inside the case body 12 by such connection by crimping.

In this assembled state, the shoulder 32 of the case 17 and the bottom plate 16 are
The side legs 22 of each of the E-shaped laminated iron cores 15 are sandwiched in the stacking direction with the overhang portions 25 of the E-shaped laminated iron cores 15, and the cover side plate portions 33 of the case 17 come into surface contact with the side leg outer surfaces 15b of the E-shaped laminated iron cores 15, The ballast body 11 is fixed in the case body 12.

Then, the case side plate portion 3 is assembled with the assembly described above.
The both ends of the bead 35 projecting from the back surface of the abutment 3 come into contact with the overhang portion 25 and the shoulder portion 32, respectively, and are sandwiched between them at the same time as the side legs 22. Thereby, each bead 35 acts as a stopper in the direction in which the overhang portion 25 and the shoulder portion 32 are sandwiched with respect to the side leg 22, and the overhang portion 25 and the shoulder portion 32 are connected to the side leg of the E-shaped laminated core 15 by the caulking operation. 22
Will not be pinched excessively strongly. For this reason, it is possible to prevent the central portion of the both legs of the portion forming the magnetic path between the two legs 22 from being deformed so as to expand in the thickness direction due to excessive pinching, and to generate noise due to this deformed state. Can also be prevented.

In the above-described assembling, as the cover side plate portion 33 comes into close contact with the side leg outer surface 15b, the beads E projecting integrally from the back surface of the side plate portion 33 come into contact with each other and are combined with each other. Four corner recesses 23 of laminated core 15
And engage with each other. At this time, as described above, since the pitch D between the two concave portions 23 is smaller than the pitch C between the beads 35, the pair of E-shaped laminated cores 15 are pressed in the butting directions as the beads 35 enter the concave portions 23, respectively. The match is strengthened. In addition, since each bead 35 is tapered, a component force in a direction perpendicular to the projecting direction is applied in the butting direction of the E-shaped laminated core 15 due to the engagement, so that the pair of E-shaped laminated cores 15 are also provided. Match is strengthened.

As described above, the engagement between the pair of beads 35 projecting from the rear surface of the cover side plate 33 and the recessed portion 23 of the E-shaped laminated core 15 positively strengthens the butting of the pair of E-shaped laminated cores 15. The butted state of the two iron cores 15 can be stabilized. Therefore, even if the discharge lamp ballast 7 receives a strong impact during the manufacturing process or the like,
Also, the butted state of the pair of E-shaped laminated iron cores 15 can be properly maintained irrespective of the vibration of the distal end of the side leg 22 accompanying the energization in the performance test. As a result, it is possible to prevent the magnetic resistance between the end faces of the abutted side legs 22 from increasing and prevent the characteristics of the discharge lamp ballast from varying, thereby stabilizing the quality.

At the same time, the restraining force against the vibration at the distal end of the side leg 22 is also improved with the strengthening of the abutment, so that the vibration at the distal end of the side leg 22 is suppressed, and therefore the noise can be suppressed. In addition, since the noise is suppressed by strengthening the butt as described above, an adhesive for preventing vibration at the tip of the side leg 22 is applied to the side leg 22 and the ballast body 1.
Since there is no need to inject between them, the productivity can be improved.

In addition, since the concave portion 23 with which the bead 35 is engaged is provided at a corner opposite to the distal end face 22a of the side leg 22 of the E-shaped laminated core 15, the concave portion 23 allows the E-shaped laminated core 15 to be formed. The effective magnetic path cross-sectional area does not decrease and the characteristics are not impaired.

[0037]

The present invention is embodied in the form described above and has the following effects.

According to the first to third aspects of the present invention, the effective magnetic path disconnection of the E-shaped laminated core is achieved by the engagement between the core pressing portion protruding from the rear surface of the cover side plate and the pressing portion receiver of the E-shaped laminated core. Since the butting of the pair of E-shaped laminated cores is strengthened without reducing the area, variation in characteristics due to poor butting of these E-shaped laminated cores can be reduced, and vibration is prevented at the tip of the side leg by the adhesive. The noise can be reduced without the need for noise.

According to the fourth aspect of the present invention, the core pressing portion serves as a stopper, and the overhanging portion and the shoulder prevent the side legs of the E-shaped laminated core from being too tightly clamped to deform the E-shaped laminated core. it can.

According to the fifth aspect of the present invention, there is little variation in characteristics due to the engagement between the core pressing portion protruding from the back surface of the cover side plate and the pressing portion receiver of the E-shaped laminated core, and the adhesive is used. Since a discharge lamp ballast capable of reducing noise without the need for an anti-vibration means is provided, a high-quality lighting fixture can be provided.

[Brief description of the drawings]

FIG. 1 is a side view partially showing a configuration of a lighting apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a discharge lamp ballast according to an embodiment of the present invention provided in the lighting fixture shown in FIG. 1;

FIG. 3 is a perspective view showing a configuration of a case of the discharge lamp ballast shown in FIG. 2;

FIG. 4A is a plan view showing an iron core plate forming an E-shaped laminated iron core of the discharge lamp ballast shown in FIG. 2; (B) is FIG. 4 (A)
The perspective view which shows the E type laminated core formed using the iron core board shown in FIG.

FIG. 5 is a plan view partially showing a relationship between a ballast body of the discharge lamp ballast shown in FIG. 2 and a cover side plate portion of a case;

FIG. 6 is a front view showing the discharge lamp ballast shown in FIG. 2 in the middle of assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lighting equipment 3 ... Lamp holder 4 ... Fluorescent lamp 7 ... Discharge lamp stabilizer 11 ... Ballast body 12 ... Case body 13 ... Coil 14 ... Coil bobbin 15 ... E-type laminated iron core 15a ... End face of E-shaped laminated iron core 15b ... E Side leg outer surface of mold laminated iron core 16 Bottom plate 17 Case 21 Central leg 22 Side leg 22 a Tip end surface of side leg 23 Depressed portion (pressed portion receiving) 25 Projected portion 25 a Caulked edge 33 Cover side plate portion 34 ... Connection end 35... Bead (iron core pressing portion) A... Bead length B... E-type laminated core thickness C.

Claims (5)

[Claims] 1. A head having a center leg and a pair of side legs, and formed by providing pressing portion receivers at corners opposite to the ends of the side legs, respectively, and being combined by abutting the ends of the side legs. A pair of E-shaped laminated iron cores, a coil bobbin around which a coil is wound and fitted to the central leg, and a pair of overhang portions, respectively.
A bottom plate for supporting a ballast body formed with the coil bobbin and the pair of E-shaped laminated cores; a cover side plate portion opposed to the ballast body supported on the bottom plate; A shoulder portion for holding the side leg between the overhanging portion, a connection end portion which is wound around the overhanging portion on the back side thereof and caulked, and a pressing portion support provided on the back surface of the cover side plate portion. And a case forming a case body together with the bottom plate, wherein the case has a core pressing portion for pressing the pair of E-shaped laminated cores in the butting direction. 2. The discharge lamp ballast according to claim 1, wherein said pressing portion receiver is formed by a concave portion. 3. A pitch between a pair of core pressing portions of the cover side plate portion is smaller than a pitch between the pressing portion receivers arranged in a direction in which the pair of E-shaped laminated cores are arranged. The discharge lamp ballast according to claim 2. 4. A cut surface in which the length of the core pressing portion is made equal to the thickness of the E-shaped laminated core, and both ends in the longitudinal direction of the core pressing portion abut on the overhang portion and the shoulder portion, respectively. The discharge lamp ballast according to any one of claims 1 to 3, wherein the ballast is formed by: 5. An appliance body, a discharge lamp attached to the appliance body via a lamp holder, and any one of claims 1 to 4 connected to the discharge lamp and attached to the appliance body. A lighting fixture, comprising: the discharge lamp ballast according to claim 1.