JP3677823B2 - Discharge lamp ballast - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a capacitor mounting structure for a discharge lamp ballast.
[0002]
[Prior art]
FIG. 9 shows a discharge lamp ballast in which a capacitor is attached to the outside of the ballast body (hereinafter referred to as “external”). Further, FIGS. 10 and 11 show a first conventional technique and a second conventional technique in which a capacitor is externally attached to the ballast body.
[0003]
With reference to FIG. 10, a capacitor mounting structure according to the first prior art will be described. The rectangular capacitor 11 is embedded in a case 12 whose outer shell is covered with plastic or metal, and a part of the capacitor main body 13 or in the capacitor case 12. It consists of a pair of protruding rectangular capacitor fixing plates 14, 14, and these capacitor fixing plates 14, 14 are attached to a bottom plate 5 constituting a part of the ballast body 2 by a method (not shown). 19 are fixed with screws 15 respectively.
[0004]
With reference to FIG. 11, a capacitor mounting structure when there is no capacitor fixing plate according to the second prior art will be described.
[0005]
The edge portion 9 formed on the periphery of the upper surface 17 of the capacitor 10 has a pair of substantially L formed so as to protrude from the capacitor mounting bracket 20 attached to the bottom plate 5 constituting a part of the ballast body 2 by a method not shown. When fitted into the character-like cut and raised portions 6 and 6, the capacitor 10 is held between the pair of cut and raised portions 6 and 6 and the locking piece 8 at the same time. Then, both ends of the substantially U-shaped capacitor fixing band 16 are respectively inserted into the insertion holes 7 and 7 formed to face the capacitor mounting bracket 20, and further bent upward to fix the capacitor 10 to the capacitor mounting bracket 20. It was.
[0006]
Next, with reference to FIG. 9 and FIG. 12 to FIG. 14, the first terminal fitting inserted into the terminal block of the transformer main body will be described.
[0007]
As shown in FIGS. 12 to 13, the ballast body 2 shown in FIG. 9 includes a coil winding portion (not shown) around which the coil 30 is wound, and flange portions 34 respectively formed at both ends of the coil winding portion. A transformer main body 28 comprising a combination of a bobbin 31 made of the above, a central leg iron core (not shown) attached in the axial direction of the bobbin 31, and side leg iron cores 29 respectively disposed on both sides of the bobbin 31 is covered with a cover 22. In addition, the base plate 5 is housed in a case 21 including a first end plate 23 and a second end plate 24.
[0008]
Further, first terminal fittings 26 are respectively inserted and attached to terminal blocks 32 formed to protrude outward from both upper sides of the bobbin 31 of the transformer main body 28.
[0009]
As shown in FIG. 13, the first terminal fittings 26 of the transformer body 28 are electrically connected to each other by soldering or the like. Further, as shown in FIG. 12, the second terminal fitting 27 provided on the first end plate 23 and the second terminal fitting 27 provided on the second end plate 24 and the first terminal fitting of the transformer main body 28. 26 are electrically connected by soldering or the like. The second end plate 24 has an opening 33 for filling with a polyester resin or the like.
[0010]
As shown in FIG. 14A, the flat first terminal fitting 26 inserted into the terminal block 32 is raised obliquely in consideration of winding of the lead wire 38 of the coil 30.
[0011]
As shown in FIG. 14B, the first terminal fitting 26 around which the lead wire 38 is wound is flattened toward the terminal block 32 on the side opposite to the flange portion of the bobbin. Bend like so. At this time, as shown in FIG. 14B, the lead line 38 is in the extending direction, so that there is a problem that the lead line 38 may be disconnected.
[0012]
The reason for flattening the terminal fitting 26 is an operation that takes into consideration the connection between the terminal fittings or the connection with the lead wire, which is the next step.
[0013]
Next, soldering or the like is performed to electrically connect the terminal fitting 26 and the lead wire 38. When soldering in the state of FIG. 14B, the tip of the soldering iron hits the lead wire 38, and the heat of the soldering iron is transmitted to the terminal fitting 26 through the lead wire 38.
[0014]
For this reason, since the contact area where the soldering iron is in contact with the lead wire is small, the heat of the soldering iron is slowly transmitted to the terminal fitting 26, and there is a problem that it takes a lot of work time for soldering. .
[0015]
Further, since the direct soldering iron presses the lead wires such as the lead wires 38, there is a problem that the lead wires may be broken by the pressing force.
[0016]
[Problems to be solved by the invention]
As described above, the capacitor mounting of the discharge lamp ballast according to the first prior art is performed by fixing a capacitor fixing plate embedded in a part of the capacitor body or the capacitor case to the capacitor mounting bracket with a screw. Was.
[0017]
Also, the capacitor mounting of the discharge lamp ballast according to the second prior art without the capacitor fixing plate is fixed to the capacitor mounting bracket with a capacitor fixing band or the like.
[0018]
In any of the above cases, components other than the capacitor mounting bracket for mounting the capacitor, that is, in the case of the first conventional technique, a screw and a capacitor fixing plate embedded in the capacitor, in the case of the second conventional technique, the capacitor A fixed band was used.
[0019]
For this reason, there are problems that the number of parts is large, resulting in an increase in cost and an increase in the number of assembly steps.
[0020]
This invention is made | formed in view of said point, and makes it a subject to provide the discharge lamp ballast which can attach a capacitor | condenser simply and reliably with few parts.
[0021]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a discharge lamp ballast according to the present invention includes a ballast body that houses a transformer body made up of a bobbin and a core that are wound with a coil in a case, and the ballast body that is integral with the ballast body. In a discharge lamp ballast comprising a capacitor mounting member mounted on a capacitor and a capacitor covered with a case of synthetic resin or the like mounted on the capacitor mounting member, the edge of the capacitor case protrudes from its upper surface. , And R-shaped bottom portions having square-shaped edge portions formed on both side edges, and the capacitor mounting member is formed with protruding cut-and-raised portions that hook and engage the edge portions of the upper surface of the capacitor. In addition, the capacitor is provided on the opposite side of the cut-and-raised part, matches the shape of the R-shaped bottom surface part of the capacitor , and is located close to and opposed to the angular edge. press with an elastic that The fixing piece is characterized in that it has integrally formed.
[0022]
In the above configuration, the edge formed on the upper surface of the capacitor is fitted into a substantially L-shaped cut-and-raised portion protruding from the capacitor mounting bracket, and the R-shaped bottom surface of the capacitor is integrated with the capacitor mounting bracket. When pressing in toward the R-shaped presser foot fixing piece formed in the above, the presser foot fixing piece portion is deformed outward.
[0023]
However, since the presser fixing piece portion is made of an elastic member and has elasticity, the R-shaped presser fixing piece portion closely contacts the bottom surface portion of the capacitor after the capacitor is fitted into the presser fixing piece portion. At the same time, the pressing force F that is cut and raised toward the piece acts, so that the capacitor is securely fixed to the capacitor mounting bracket.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. The same structure as that of the prior art will be described with the same number.
[0025]
FIG. 1 is a perspective view showing a discharge lamp ballast in which a capacitor mounting bracket according to an embodiment of the present invention to which a capacitor is mounted is externally attached to a ballast body.
[0026]
The reason why the capacitor is externally attached is to make it difficult for heat generated from the transformer body 60 built in the ballast body 43 to be transmitted to the capacitor, and this type of capacitor is generally externally attached.
[0027]
As shown in FIGS. 3 and 4, reference numeral 42 denotes a capacitor mounting bracket which is a capacitor mounting member for mounting the square capacitor 50, which is made of a case 65 covered with a synthetic resin or the like. A pair of substantially flat mounting portions 47 to which the longitudinal side surface 54 of the capacitor 50 is attached, and a portion of the edge portion 52 protruding from the upper surface 51 of the capacitor 50 is hooked and fixed to the mounting portion 47. The L-shaped cut and raised portions 44 and 44 are respectively cut and raised, and the rising pieces 45 for regulating the width direction of the capacitor 50 are respectively bent and formed at both ends of the mounting portion 47. Yes.
Further, the bottom of the R-shaped capacitor has a pair of elasticity at a position facing the opening 48 of the cut-and-raised portion 44 and is engaged with an R-shaped engagement surface 55 formed on the bottom surface 53 of the capacitor 50. The pieces 46 and 46 are formed, respectively. Further, arc-shaped fitting guide portions 49 for guiding the capacitor bottom surface portion 53 are formed at the tips of the presser fixing piece portions 46, respectively.
Further, as shown in FIGS. 2 and 3, the square capacitor 50 has square edge portions 65 a formed in a square shape on both side edges of the bottom surface portion 53 where the R-shaped engagement surface 55 is formed. ing. The distal end side portion of the presser fixing piece 46 disposed between the square edges 65a and engaged with the R-shaped engagement surface 55 approaches and faces the square edges 65a.
[0028]
Further, a member for connecting and fixing to the bottom plate 5 constituting a part of the ballast body 43 is provided in the capacitor mounting bracket 42. That is, the capacitor mounting bracket 42 has a pair of insertion piece portions 61 bent in the opposite direction to the cut and raised portion 44 provided in the mounting portion 47 and a pair of fixing claws 62 fixed to the bottom plate 5. , 62 are formed.
[0029]
Next, the procedure for assembling the capacitor into the capacitor mounting bracket will be described.
[0030]
First, as shown in FIG. 2, the upper surface edge portion 52 of the capacitor 50 is fitted into the pair of raised portions 44 and 44. Subsequently, the bottom surface 53 side of the capacitor 50 is pushed toward the pair of R-shaped presser fixing pieces 46 and 46. At this time, since the fitting guide portion 49 is formed in an arc shape outward, the capacitor 50 can be smoothly fixed to the pressing and fixing piece portion 46.
[0031]
Further, since the presser fixing piece 46 is formed in an R shape and has elasticity, when the capacitor 50 is inserted, the presser fixing piece 46 is deformed outward. Since the presser fixing piece 46 comes into close contact with the bottom surface portion 53 of the capacitor 50, the capacitor 50 can be securely attached and fixed by the presser fixing piece 46. Note that, as shown in FIG. 3 (B), a force F directed toward the cut-and-raised portion 44 acts on the presser fixing piece portion 46 that is in close contact with the R-shaped engagement surface 55a of the capacitor bottom surface portion 53. The capacitor 50 is securely fixed to the capacitor mounting bracket 42 .
[0032]
In this way, the capacitor can be easily and surely attached to the capacitor mounting bracket with a small number of parts simply by providing the capacitor mounting bracket with the elastic R-shaped capacitor retainer fixing piece 46.
[0033]
The presser fixing piece may be manufactured as a separate part and fixed integrally to the capacitor mounting bracket with a fixing member such as a rivet (not shown).
[0034]
The capacitor mounting bracket 42 is attached to the bottom plate 5 in a not-shown insertion hole formed in the bottom plate 5 with a pair of insertion piece portions 61 formed by bending the capacitor mounting bracket 42 so as to face the opposite direction of the portion 44. The capacitor fitting 42 is fixed to the bottom plate 5 by inserting and bending the fixing claw 62 so as to be wound around the rising piece of the bottom plate 5.
[0035]
Next, with reference to FIG. 1 and FIG. 5 to FIG. 8, the first terminal fitting to be inserted into the terminal block of the transformer main body will be described.
[0036]
As shown in FIG. 7, the ballast body 43 shown in FIG. 1 includes a bobbin 31 around which the coil 30 is wound, a central leg iron core (not shown) attached in the axial direction of the bobbin 31, and both sides of the bobbin 31. As shown in FIG. 1, a transformer main body 60 composed of a combination with the side leg cores 29 and 29 to be arranged is composed of a cover 22, a bottom plate 5, a first end plate 23, and a second end plate 24. It is housed in the case 21 . Further, terminal blocks 32 are provided so as to protrude outward from the upper portions on both sides of the bobbin 31.
[0037]
Then, a flat first terminal fitting 70 is inserted into and fixed to the terminal block 32, and the first terminal fittings 70 of the transformer body 60 are electrically connected to each other with solder or the like as shown in FIG. . Next, the second terminal fitting 27 provided on the first end plate 23, the second terminal fitting 27 provided on the second end plate 24, and the first terminal fitting 70 of the transformer body 60 are soldered together. Connect electrically. The second end plate 24 has an opening 33 for filling with a polyester resin or the like.
[0038]
As shown in FIG. 8, the first terminal fitting 70 of the transformer main body 60 is formed with a cut and raised portion 71 bent upward using a part of the terminal fitting 70. Further, a bent portion 72 is bent outwardly (in a direction opposite to the flange portion of the coil bobbin) at a substantially right angle at the tip of the cut and raised portion 71.
[0039]
Since the bent portion 72 has its tip bent outward at a substantially right angle, there is no fear that it will come off even if the lead wire 38 is wound around the cut and raised portion 71.
[0040]
As a means for electrically connecting the terminal fitting 70 and the lead wire 38, there is soldering or the like. In this case, when a soldering iron is applied to the upper surface 72 a of the bent portion 72, the heat of the soldering iron is transmitted from the bent portion 72 to the cut and raised portion 71, and the lead wire wound around the cut and raised portion 71. 38 is soldered .
[0041]
For this reason, since the tip of the soldering iron comes into contact with the flat bent portion 72, the contact area of the soldering iron is increased, so that the work time required for soldering can be shortened.
[0042]
In addition, since the cut-and-raised portion 71 around which the lead wire 38 is wound and the other terminal fittings are connected to an external line, the connection work is facilitated.
[0043]
Furthermore, since the cut-and-raised portion 71, which is the winding portion of the lead wire 38, is located above the terminal block 32, solder connection at the dip is also facilitated.
[0044]
As explained above, in the terminal device that inserts the terminal fitting on the outside of the coil bobbin formed of synthetic resin or the like, on the upper part of the cut and raised portion formed by cutting and raising a part of the flat terminal fitting, Since the terminal device is provided with a bent portion by bending substantially outward at a right angle, the following effects are obtained.
[0045]
1stly, since the cut-and-raised part which is a winding part of a leader line exists above a terminal block, winding of a leader line becomes easy.
[0046]
Secondly, since the bent portion formed by bending at a substantially right angle in the outer direction is provided at the upper portion of the cut and raised portion, there is no winding failure of the lead wire.
[0047]
Third, a soldering iron is applied to the bent portion, and the lead wire and the cut-and-raised portion are connected by soldering, so that the soldering operation is facilitated.
[0048]
Furthermore, since the soldering iron does not directly contact the lead wire, the lead wire does not break.
[0049]
【The invention's effect】
As described in detail above, according to the present invention, in the discharge lamp ballast, the capacitor mounting member has a cut-and-raised portion that engages with the edge of the capacitor, and a presser fixing that has elasticity that matches the outer shape of the bottom surface of the capacitor. After the capacitor is mounted on the capacitor mounting member, the elastic clamp holding piece is in close contact with the bottom surface of the capacitor, and the capacitor can be easily and securely attached to the capacitor mounting member with fewer parts. Can be installed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a discharge lamp ballast with an external capacitor according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state where a capacitor is attached in the same embodiment;
FIG. 3 shows a state where a capacitor is attached in the same embodiment;
(A) is a perspective view. (B) is a front view.
FIG. 4 is a perspective view showing a capacitor mounting bracket in the same embodiment.
FIG. 5 is a perspective view showing a state in which the terminal fitting of the transformer main body and the terminal fitting of the end plate are matched with each other in the embodiment.
FIG. 6 is a perspective view showing a state in which the terminal fittings of the transformer bodies in the embodiment are matched with each other.
FIG. 7 is a perspective view showing a state where the terminal fitting is inserted into the transformer body in the same embodiment.
FIG. 8 is a perspective view showing a terminal fitting in the embodiment.
FIG. 9 is a perspective view showing a discharge lamp ballast with an external capacitor according to the prior art.
FIG. 10 is a perspective view showing a state in which a capacitor is attached to a ballast body in the first prior art.
FIG. 11 is a perspective view showing a state in which a capacitor is attached to a ballast body in the second prior art.
FIG. 12 is a perspective view showing a state in which a terminal fitting of a transformer body and a terminal fitting of an end plate are matched with each other in the prior art.
FIG. 13 is a perspective view showing a state in which terminal fittings of transformer bodies in the prior art are matched with each other.
14A is a perspective view showing a terminal fitting of a transformer body in the prior art, in which FIG.
(B) is a perspective view which shows the state which wound the lead wire around the terminal metal fitting and bent it.
[Explanation of symbols]
42: Capacitor mounting bracket (capacitor mounting member),
43 ... ballast body,
44. Cut-and-raised part,
46: Presser foot fixing piece,
47. Placement part,
49 ... Guide 50 ... Capacitor,
51 ... top surface of capacitor,
52 ... the edge of the upper surface ,
53 ... Bottom of capacitor,
55 ... R-shaped engagement surface at the bottom,
60 ... transformer body,
65: Case of capacitor ,
65a: Square edge of the capacitor .

Claims (1)

A ballast body that houses a transformer body consisting of a bobbin and an iron core in which a coil is wound in a case;
A capacitor mounting member integrally mounted on the ballast body;
In a discharge lamp ballast comprising a capacitor covered with a case of synthetic resin or the like attached to the capacitor mounting member ,
The capacitor has an edge protruding from its upper surface, and an angular edge formed in an angular shape on both side edges of the R-shaped bottom surface;
In the capacitor mounting member,
While projecting and forming a raised part that hooks and engages the edge of the upper surface of the capacitor,
It is provided on the opposite side of the cut-and-raised portion with the capacitor in between, and matches the shape of the R-shaped bottom surface portion of the capacitor , and is disposed close to and opposed to the angular edge portion. A discharge lamp ballast characterized by integrally forming a presser fixing piece portion having the holding member.

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