JPS59130002A - Illuminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a lighting device, and particularly to a mounting structure for a lamp and a lighting circuit.

[Technical background of the invention]

For example, high-pressure discharge lamps used in automobile headlamps are equipped with a pulse transformer that generates a high voltage when starting. This pulse transformer is attached to a printed circuit board together with other electrical components used in the starting circuit and the booster circuit, and is connected to the discharge lamp via a lead wire.

[Problems with background technology]

However, this pulse transformer has a pulse width of 1 μz.
It generates a high pulse voltage of approximately tc, and since the pulse transformer and the discharge lamp are separated and connected via a lead wire, radio noise is radiated via the lead wire. This radio noise had a negative effect on the radio or the microcomputer that controlled the engine.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a lighting device that reduces radio wave noise and does not adversely affect radio or engine control.

In order to reduce radio noise, it is possible to shorten the distance between the pulse transformer and the discharge lamp.

Therefore, the lighting device of the present invention includes a lamp and a coil device that is wound around a bobbin and constitutes at least a part of a lighting device that lights the lamp, and the lamp and the flanges of the bobbin are electrically and mechanically connected to each other. The device is characterized in that it has an engaging means that connects with each other.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described based on Figures 1 and 2.

Figure i11 is a circuit diagram of a lighting device used in an automobile headlight. In this figure, (11 is D C
I is a power supply terminal to which 2V is applied, and this power supply terminal (1)
In between are switching transistors (21 (31), resistors (
4) (5), oscillator (6), inverter transformer (power,
A booster circuit α2 consisting of a rectifier (8), capacitors (9) (10), and a constant current inductor (11), and this booster circuit (capacitor α3Q4 located after 121),
A starting circuit H consisting of a resistor (151, a diac aω, and a pulse transformer aη as a coil device) is connected to a metal halide lamp (19).

Figure 2 shows the structure of the starting circuit (181) and lamp (L9).The pulse transformer a''7] is equipped with a core C2 and a bobbin 4, and the lower flange (24) of this bobbin (24) is shown in Figure 2.
A component arranging portion (24) is formed protrudingly on the negative side of 3). On the top surface of this parts installation part, electrical components such as a capacitor (131 (2), a resistor 151, and a diac) that constitute the starting circuit (2) shown in Figure 1 are electrically connected. Fixed.

Two terminal pins (27) as electrodes are fixed to the lower surface of the flange (c) of this pulse transformer (17), and the starting circuit is connected to the lead wires in Figure I-1. It is connected to the terminal (α)←) shown.

This pulse transformer αη has terminal bins (27) (5) on the bottom surface.
) is fixed to an insulating plate (28) made of resin etc. that inserts and supports the electrical parts (c).
It is surrounded by an outer container. Furthermore, (30)
is a lead wire that connects the booster circuit a and the starting circuit a barrel.

The socket part r34 of one metal halide lamp has a connection hole (G) (33) that serves as a recess that is removably inserted into the terminal bin +27) (27+), and the inside of this connection hole C (31 (33)) is opened. A conductor (not shown) connected to the filament of the lamp Q is provided.

Next, the operation of this embodiment will be explained.

First, the operation of the circuit shown in Figure 1 will be explained. Power terminal (
The voltage of DC1 2V inputted to 1) is boosted to approximately 200V by an inverter in booster circuit a.

When the lamp (191) is started, a pulse width of 1 μsec is generated between terminals (α) (4) by the operation of the starting circuit a mallet.
A high pulse voltage of approximately 5KV is generated at about 500 volts, which is applied to the lamp to start the lamp.

In this way, the lamp is started and turned on, but at this time, the odor of the lamp is emitted by the pulse transformer a, as shown in Figure 2.
η bobbin (terminal pin (2) 07 fixed to 24) K
Because the socket part r3) is inserted directly, the distance between the lamp frame and the pulse transformer (1η) that generates high voltage is short.For this reason, the lamp and pulse transformer cannot be connected with a lead wire as in the conventional case. This means that the source that emits radio noise is smaller than in the case of a conventional system, and the generation of radio noise that adversely affects radios, microcomputers, etc. can be reduced.

Also, when replacing the lamp α
7) and the socket part 0, and this can be easily done.

Furthermore, since the electrical components (251) that constitute the starting circuit discharge are fixedly connected to the component mounting section (2a) formed on the flange (c) of the bobbin (2), the above-mentioned components can be arranged as before. It does not require a printed circuit board for this purpose, making it inexpensive.

In addition, pulse transformer CI? ) and the lamp σ, as shown in Figure 3, a connecting hole (361 ( 36], and the terminal piece 6 connected to the terminal (α) (8) shown in FIG. t381081, insert the open terminal pin into the connection hole 4361 (36), and connect the terminal piece C3η.
It is also possible to configure the connection to 0η. With this configuration, since the terminals (a) (-') that generate high voltage are not exposed, accidents such as electric shock can be prevented and safety can be improved.

In each of the above embodiments, the starting circuit a is provided, and the lamp (Li2) is fixed to the insulating plate to which the pulse transformer housing η of the starting circuit a is fixed. Connect the terminal pin t2uη or connection hole (36) to the flange (c) of the transformer (Lη) (27I).
(36) etc., and the lamp α1 can be directly fixed to the flange (c).

Note that the lamp←9) and bobbin (221) are the connection hole (33
1 (331 (361 (g) and terminal pin (27) (2ηG
In addition to the insertion and insertion with the mark, separate auxiliary fixing means may be provided using mechanical means.

In addition, not only for automobile headlights but also for household fluorescent lamps that do not require a starting circuit σ8), the lamp may be fixed to the inverter transformer (power bobbin) of the booster circuit α4.ゝ＼ Also, since the distance over which the boosted voltage is applied is shorter than when connecting with a lead wire as in the past, the noise caused by the boosted voltage can be reduced.In this way, the lead wire is omitted. By doing so, the attenuation of high frequency voltage can be reduced.

In addition to metal halide lamps and fluorescent lamps, halogen lamps and the like can also be used as the lamps. Note that in the case of a halogen lamp, the rated lamp voltage is generally low, so a step-down transformer can be used in this case. In addition, in the case of a bright light lamp, it must be a ring-shaped lamp or a U-shaped lamp with the filament terminal in one direction.

〔Effect of the invention〕

According to the present invention, the distance between the lamp and the transformer that generates high voltage is shortened, so the distance over which high-voltage AC voltage is applied is shortened, and the source of noise is reduced.
Noise generation can be reduced.

[Brief explanation of drawings]

Figure 1 is a circuit diagram showing one embodiment of the lighting device of the present invention.]
・Figure 2 is a cross-sectional view showing the structure of the above starting circuit and lamp,
FIG. 3 is a sectional view showing another embodiment of the same structure. (121...External pressure circuit that constitutes the lighting circuit, (L'0...
・Pulse transformer as coil device ρ, (181・
・The starting circuit, the rice cake, the lamp, and the four components that make up the lighting circuit.
Bobbin, (27) (28)... Terminal pin as an electrode, (elutriation (3)... Connection hole as a recess. January 14, 1982)

Claims (3)

[Claims] (1) A lamp comprising a lamp and a coil device that is wound around a bobbin and constitutes at least a part of a lighting circuit that lights the lamp, and the lamp and the flanges of the bobbin are electrically and mechanically connected to each other. A lighting device comprising an engaging means. (2) The lamp has a pair of protruding electrodes, and the flange of the bobbin has a pair of recesses that have a conductive part inside and engage with the pair of electrodes. A lighting device according to claim 1. (3) The flange portion of the bobbin has a pair of protruding electrodes, and the lamp has a pair of four portions each having a conductive portion disposed therein and engaging with the pair of electrodes. A lighting device according to claim 1.