JP3133798B2 - Ballast for discharge lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballast for a discharge lamp, and more particularly to an improved assembly structure.

[0002]

2. Description of the Related Art Conventionally, a ballast for a discharge lamp has been used for stably lighting a discharge lamp or the like. The ballast for a discharge lamp is usually provided at a coil insertion portion formed by an outer core and an inner core. It is configured by inserting a bobbin around which a winding is wound. By the way, it is necessary to connect external wiring etc. to supply current to the windings to the ballast for the discharge lamp, and to prevent overheating, damage and burnout due to overcurrent while using the ballast. , It is necessary to install a current fuse.

Conventionally, connection of external wires, thermal fuses, and the like is performed manually, and the thermal fuses are fixed to the windings with a tape or a tightening band to properly detect the temperature of the discharge lamp ballast. I was

[0004]

However, in such a manufacturing method that relies on the skill of the assembling worker, the insulation configuration differs depending on the worker, and furthermore, the displacement of the mounting position of the thermal fuse or the current fuse or the like is not affected by the temperature or the temperature. It is extremely difficult to stably obtain a ballast for a discharge lamp having a uniform performance because it affects the detection result of the current. In recent years, automation has been strongly demanded for the production of ballasts for discharge lamps, and it has become necessary to appropriately automate and mechanize such manual operations.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a ballast for a discharge lamp which can reliably obtain uniform performance and can be adapted to automation and mechanization of assembly. Is to do.

[0006]

Means for Solving the Problems] discharge lamp ballast according to the present invention in order to achieve the object, wound wound on the bobbin, in the discharge lamp ballast to be inserted into the core, the
The ballast for the discharge lamp is fixed to at least the bobbin and the bobbin.
And a terminal block having legs for constant support, the ball
The bin is electrically connected to the winding at a position exposed from the iron core.
A first terminal portion is formed, and the terminal block is
When fixedly supported on the bobbin by the part ,
A second terminal portion electrically coupled to the formed first terminal portion and supplied with power from an external wiring held in a predetermined position , wherein the terminal block has a leg portion of the terminal block and a bobbin. Is arranged in the gap formed by and electrically connected to the second terminal part
And a temperature fuse and current fuse that is, the temperature
When the terminal fuse is fixedly supported on the bobbin,
At the position where it contacts the winding wound on the bobbin.
The current fuse fixes the terminal block to a bobbin.
When held, it is arranged at a position separated from the winding .

[0007]

In the ballast for a discharge lamp according to the present invention, as described above, the external wiring is connected to the terminal block, and the terminal block and the bobbin are joined to supply power to the bobbin winding through both terminal portions. Is done. On the other hand, the current fuse and the thermal fuse are arranged in the leg gap of the terminal block and are mounted on the bobbin together with the terminal block, so that a predetermined position with respect to each winding is always secured.

As described above, according to the ballast for a discharge lamp according to the present invention, connection and arrangement of external wiring and positioning of a current fuse and a thermal fuse can be performed only by mounting and fixing a terminal block on a bobbin. In addition, the assembly work can be automated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a ballast for a discharge lamp according to one embodiment of the present invention. In FIG. 1, the ballast 10 for a discharge lamp includes a transformer 12, a terminal block 14, and a capacitor 16. The terminal block 14 is fixed to a bobbin 18 disposed in an iron core 17 of the transformer 12. Is fixed to the capacitor 16. Then, the connected body of the transformer 12, the terminal block 14, and the capacitor 16 is inserted into the case 20, and is fixed by a compound (not shown).

In this embodiment, the terminal block 14 is configured as shown in FIG. That is, FIG.
4, (B) is a front view from the same direction as FIG. 1,
(C) is a side view, (D) is a back view (bobbin mounting side),
(E) is a rear view. In the figure, the terminal block 14 has a square frame 22, a terminal mounting portion 24 arranged on the front side in the figure, and legs 26a, 26 extending downward at four corners.
b,... 26d. The terminal mounting portion 24 is provided with insertion holes 28a, 28b,.
, Male contacts (second terminal portions) provided at the tips of the external wires are inserted and fixed. Therefore, when the external wiring is attached, the tip of the male contact projects from the lower part of the insertion hole 28.

The legs 26 each have a U-shaped tip and constitute an engaging portion with the bobbin 18. FIG. 3 shows a state in which the external wiring 30 and the capacitor 16 are attached to the terminal block 14, and FIG.
(B) is a side view, and (C) is a bottom view. In the figure, four external wirings 30 are adhered in a line, and the external wirings 30a and 30b have bifurcated male contacts 32a and 32b at their ends, respectively.
Od is joined to one male contact 32c. The male contacts 32a, 32b, and 32c are inserted into the insertion holes 28a, 28b, and 28c, respectively.
Male contacts 3 2 d alone is inserted and fixed to 8d.

A current fuse 3 is connected to the male contact 32d.
4 and the thermal fuse 36 are connected in series, and the other end of the thermal fuse 36 is connected to the male contact 32a. The male contact 32a is connected to one end of the capacitor 16, and the male contact 32c is connected to the other end of the capacitor 16. On the other hand, bobbin 18
It is configured as shown in FIG. That is, FIG. 4A is a top view, FIG. 4B is a front view from the same direction as FIG. 1, and FIG. 4C is a side view. As is clear from the figure, a winding 40 is wound around the bobbin 18 to form a coil. The ends of the windings 40 are connected to female contacts 42a and 42b (first terminal portions) provided at the upper front part in FIG.

At four corners of the upper portion of the bobbin 18, the fitting portions 44a, 4 which are fitted to the tips of the legs 26 of the terminal block 14, respectively.
.. 44d are provided, and the fitting portion 44 is formed in a wedge-like shape having a pointed top in the figure. The terminal block 14 and the bobbin 18 according to the present embodiment are configured as described above. For this reason, by positioning the terminal block 14 on the bobbin 18 and pushing it downward, the leg 2
6a to 26d are the corresponding fitting portions 44a to 4 of the bobbin 18.
Spreads along the 4d wedge shape, and legs 26a to 26d
Is firmly positioned and fixed in a state where the U-shaped end portion of the U-shape goes over the fitting portions 44a to 44d.

At this time, the tips of the male contacts 32b and 32d projecting below the terminal block 14 are
The female contacts 8a and 42b of FIG. 8 are fitted to each other to obtain an electrical connection therebetween. On the other hand, current fuse <br/> over 34 as described above, the temperature fuse 36 is disposed in the space between the bobbin 18 which is formed by the legs 26, current fuse 34
Is located at a position separated from the bobbin 18 (coil), and the thermal fuse 36 is located at a position in contact with the winding 40. Therefore, current fuse 34 can be carried out to monitor the current without greatly influenced by the heat generated from the windings 40, and the temperature fuse 36 can be monitored with good responsiveness to the temperature of the winding 40.

As described above, according to the ballast for a discharge lamp according to the present embodiment, since the positioning of each member can be performed accurately, uniform performance can be obtained without variation by an operator, and further, the assembly can be performed. Automation and mechanization can be achieved. In addition, wiring errors and the like can be prevented by the collection of components, and workability is improved by simplifying the work.

Further, the temperature fuse and the current fuse are arranged at fixed positions, so that a reliable operation can be obtained. It is preferable that the mounting position of the current fuse is separated from the coil surface by 2 cm or more. The normal current fuse is configured to operate when a current flows at least five times the rated current. In addition, since the thermal fuse has only a difference of 5 to 10 ° C from the actual temperature of the coil surface by bringing the thermal fuse into close contact with the coil surface, use a thermal fuse having a coil safe temperature of -5 to 10 ° C. Is preferred.

[0017]

As described above, according to the ballast for a discharge lamp according to the present invention, the external wiring is concentrated and fixed to the terminal block.
And a second terminal block provided in the gap between the terminal block and the transformer .
Since the temperature fuse and the current fuse were electrically connected to the terminal section, the first terminal section of the bobbin and the second terminal section of the terminal block were simply inserted into the bobbin.
Since the connection is made, each electrical connection and the positioning of the thermal fuse and the current fuse with respect to the transformer can be performed.

[Brief description of the drawings]

FIG. 1 is an external side view of a ballast for a discharge lamp according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a terminal block used in the ballast for a discharge lamp shown in FIG.

FIG. 3 is an explanatory diagram showing a state where a capacitor, a fuse, and the like are attached to the terminal block shown in FIG. 2;

FIG. 4 is an explanatory view of a bobbin used in the ballast for a discharge lamp shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ballast for discharge lamps 12 Transformer 14 Terminal block 18 Bobbin 26 Leg 34 Current fuse 36 Thermal fuse

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 60-174225 (JP, U) Japanese Utility Model Showa 59-166434 (JP, U) Japanese Utility Model Showa 55-167634 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H01F 30/00-38/42

Claims (1)

(57) [Claims] A winding is wound around a bobbin and inserted into an iron core.
Discharge ballastThe discharge lamp ballast includes at least a bobbin and the bobbin.
And a terminal block having legs for fixedly supporting the terminal block. ,The bobbin is electrically connected to the winding at a position exposed from the iron core.
The combined first terminal portion is formed, The terminal block is provided by the legs. Fixed support on the bobbinI
WhenThe bobbinFormed inWith the first terminalElectrically
CombineFrom external wiring held in placePowered
ToHaving a second terminal portion,In the terminal block, the terminal block Formed by leg and bobbin
Is placed in the gapIs electrically coupled to the second terminal
WasEquipped with thermal fuse and current fuse, The thermal fuse fixedly supports the terminal block on a bobbin.
At the position where it touches the winding wound on the bobbin when
And The current fuse fixedly supports the terminal block on a bobbin.
Is placed at a position separated from the winding Specially
Discharge lamp ballast.