JPS6231933Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source device comprising a high-output discharge lamp for use in, for example, a movie projector, which requires cooling.

Generally, a light source device equipped with a discharge lamp requires a lighting starting device to obtain the high voltage necessary for initial breakdown.
In particular, high-output discharge lamps generate a large amount of heat as they emit light, which tends to cause the envelope to reach extremely high temperatures, shortening its lifespan.Therefore, additional cooling means are required to prevent this. be done.

For this reason, conventionally, as shown in FIG.
Metal heat dissipation members 2A, 2B having A, 24B
are fixedly provided, a recess is formed in each of the opposing surface portions of the heat radiating members 2A and 2B, and the caps 31A and 31B of the discharge lamp 3 are inserted into these recesses. are electrically connected and held, and each of the heat dissipating members 2A, 2B is connected to a lead wire 4.
A and 4B are connected to the lighting starting device 5 disposed outside the lamp 1, and the lamp 1 is
For example, a cooling fan 100 that supplies cooling air into the
The light source device 6 is constructed by providing a cooling air supply mechanism such as the above. 7 is a mirror, and 8 is a light transmitting window. In order to supply power to the light source device 6, a power source device 9 is connected to the lighting starting device 5.

However, in a light source device having such a configuration, for example, a xenon short arc lamp is used as the discharge lamp 3, and a frequency of 2 MHz and a voltage of 40 kV are set, for example, to perform initial breakdown.
Even if a high frequency high voltage is generated by the lighting starting device 5 and supplied to the discharge lamp 3,
Since the lighting starting device 5 and the heat dissipating members 2A, 2B are connected by the lead wires 4A, 4B,
The high voltage from the lighting starting device 5 is connected to this lead wire 4A.
Alternatively, the light attenuates considerably at 4B, and as a result, starting the discharge lamp 3 may fail.

The present invention was developed based on the above-mentioned circumstances, and it is possible to reliably supply the high voltage from the lighting starting device to the discharge lamp as it is, and therefore to ensure the lighting starting of the discharge lamp. The purpose of this device is to provide a light source device that can provide high-performance light source equipment, and its features include a lamp, a metal heat radiating member fixedly provided within the lamp, and a discharge lamp that is electrically connected and held to the heat radiating member. a mating part provided on the heat dissipation member that also serves as an electrical contact; a through hole formed in the outer wall of the lamp opposite to the mating part; and an output terminal that fits into the mating part. and a lighting starting device having a fitting part that also serves as an electrical contact,
The fitting part of the lighting starting device is fitted into the fitted part of the heat radiating member through the through hole, so that the lighting starting device is electrically connected to the heat radiating member and held. .

Embodiments of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention, FIGS.
As shown in the figure, an insulating material 1 is attached to the lower bottom wall 11 inside the lamp 1.
A pair of metal heat dissipating members 2A and 2B are fixed and placed opposite each other through the heat dissipating members 2A and 2B, and a recess is formed in each of the opposing surfaces of the heat dissipating members 2A and 2B. Each cap 31A, 31B of the electric lamp 3 is inserted to electrically connect and hold the discharge lamp 3, and a mirror 7 is fixed to the back wall 12 of the lamp 1 so as to be located behind the discharge lamp 3,
A light transmitting window 8 is provided on the front wall 13 of the lamp 1 located in front of the discharge lamp 3, and each side surface portion 22A of the heat dissipating members 2A, 2B facing the back wall 12 of the lamp 1,
Holes are provided in 22B to form concave fitted parts 23A and 23B which also serve as electrical contacts, and through holes 121A and 121B are formed in the back wall 12 at positions where the fitted parts 23A and 23B face each other, respectively. Then, from the outside of the lamp 1, the lighting starting device 5, which has convex fitting parts 51A and 51B that have a shape that can be fitted to the fitted parts 23A and 23B and also serves as an electrical contact as an output terminal, is connected to the lighting starting device 5 from the outside of the lamp 1. The fitting portions 51A and 51B are arranged on the back wall 12, and the fitting portions 51A and 51B are connected to the fitted portion 23 through the through holes 121A and 121B.
A, 23B, the lighting starting device 5 is electrically connected to the heat dissipating members 2A, 2B, and is fixedly held thereto, thereby forming a light source device 6. Here, the relationship between the projections and depressions may be reversed, and the fitted portion 23A,
23B and the fitting portions 51A, 51B,
It is sufficient to use an electrical connection member that corresponds to the size of a cylindrical plug with a diameter of about 5 to 10 mm because it can withstand considerable weight and vibration, and other known electrical connection members can be used. . For example, in a light source device equipped with a discharge lamp 3 with an output of 300W, the dimensions of the lamp 1 are 15 cm in width, 15 cm in thickness, and 15 cm in height.
The size of the lighting activation device 5 is approximately 15cm.
Approximately 12cm long, 4cm thick, 10cm high, and weighs approximately 200g.
Therefore, the lighting starting device 5 is held and fixed firmly enough.

FIG. 4 shows an example of a circuit of a light source device 6 and a power supply device 9 for supplying power to the light source device 6. The power supply device 9 rectifies alternating current from a switch S and a power source E into direct current. The light source device 6 is composed of a bridge rectifier D and a smoothing circuit consisting of a resistor R2 and a capacitor C2 for smoothing the direct current from the bridge rectifier D. A charging capacitor C1, a side capacitor SSS that turns on when the charging voltage of the charging capacitor C1 exceeds a breakover voltage, and a primary coil are connected between the side capacitor C1 and the capacitor C1.
The next coil is constituted by a pulse transformer PT inserted between the smoothing circuit and the discharge lamp 3.

According to the above configuration, when the switch S is closed, the DC voltage smoothed by the power supply device 9 is applied to the capacitor C1 of the light source device 6 to charge it, and the magnitude of this charging voltage is the breakdown of the SIDAC SSS. When the voltage exceeds the voltage, the charge in the capacitor C1 is instantly released and flows to the primary coil of the pulse transformer PT, which induces a high frequency high voltage in the secondary coil of the pulse transformer PT, and this high frequency high voltage is applied to the discharge lamp 3. Supplied and started.

In this embodiment, the lighting starting device 5
Since the fitting parts 51A and 51B, which are the output terminals of the Only the heat dissipating members 2A and 2B are interposed between them, and the lead wires 4A and 4B as shown in FIG. As a result, the high voltage path is significantly shortened, and therefore the high frequency high voltage from the lighting starting device 5 is supplied to the discharge lamp 3 as it is with almost no attenuation, and as a result, the discharge lamp 3 can be lit reliably. can.

The heat dissipating members 2A and 2B are made of metal and have a good heat dissipating effect and are strong.On the other hand, the lighting starting device is small and lightweight, so the fitting part 5
By fitting the parts 1A and 51B into the fitting parts 23A and 23B, the lighting starting device 5 can be securely held and fixed, and the light source device can be made compact as a whole.

FIG. 5 shows another embodiment, in which only one base 31A of the discharge lamp 3 is fixed to the bottom wall 11 of the lamp 1. The discharge lamp 3 is electrically connected and held in place, and the other base 31B is placed in an exposed state, and the heat dissipating member 2 is fitted with a fitted part that also serves as an electrical contact, as in the above-mentioned example. 23, and has a shape capable of fitting into the fitted portion 23, and serves as an electrical contact as an output terminal.
1, the high voltage side is connected to the heat dissipation member 2 by fitting the fitting part 51 to the fitted part 23 through the through hole 121 provided in the lamp 1. At the same time, one end is held, and the other end is screwed onto the lamp 1 with, for example, a screw 52 to hold it, and the exposed cap 31B and the other output terminal of the lighting starting device 5 are connected to each other by a connecting wire 33. It is connected and configured. Reference numeral 7 denotes a mirror disposed in a recess formed in the heat dissipating member 2.

Even in this configuration, since the high voltage path from the lighting starting device 5 to the discharge lamp 3 is short, the high frequency high voltage from the lighting starting device 5 can be supplied to the discharge lamp 3 almost as is. lighting can be performed reliably. By fitting the fitting part 51 into the fitted part 23, one end of the lighting starting device 5 can be held, so by fixing the other end to the lamp 1 with, for example, a screw 52, the lighting starting device 5 can be reliably maintained.

As described above, the present invention includes a lamp, a metal heat radiating member fixedly provided within the lamp, a discharge lamp electrically connected and held to the heat radiating member, and an electrical contact provided on the heat radiating member. A lighting device comprising: a mating portion that also serves as an output terminal, a through hole formed in an outer wall of the lamp opposite to the mating portion, and a mating portion that also serves as an electrical contact as an output terminal that fits into the mating portion. a starting device, the fitting part of the lighting starting device is fitted into the fitted part of the heat radiating member through the through hole, and the lighting starting device is electrically connected to the heat radiating member. Since the structure is characterized in that the high voltage from the lighting starting device can be reliably supplied to the discharge lamp as is, the light source can reliably start the lighting of the discharge lamp. equipment can be provided.

[Brief explanation of the drawing]

Fig. 1 is an explanatory sectional view showing an example of a conventional light source device, Fig. 2 is an explanatory sectional view showing an embodiment of the present invention, and Fig. 3 is an explanation of the main parts of the example shown in Fig. 2. FIG. 4 is an explanatory circuit diagram showing an example of a circuit of a light source device and a power supply device connected thereto, and FIG. 5 is an explanatory cross-sectional view showing another embodiment of the present invention. 1... Lamp, 2A, 2B, 2... Heat dissipation member, 3
...Discharge lamp, 31A, 31B...Base, 4A, 4
B... Lead wire, 5... Lighting starting device, 6... Light source device, 9... Power supply device, 14... Insulating material, 23
A, 23B, 23... Fitted part, 121A, 12
1B, 121...Through hole, 51A, 51B, 51
...Mating part, S...Switch, D...Bridge rectifier, C1...Charging capacitor, SSS...Sidac, PT...Pulse transformer, 33...Connecting wire.

Claims (1)

[Scope of utility model registration request] A lamp, a metal heat radiating member fixedly provided within the lamp, a discharge lamp electrically connected and held to the heat radiating member, and a fitted portion provided on the heat radiating member that also serves as an electrical contact; The lamp includes a through hole formed in an outer wall of the lamp facing the fitted part, and a lighting starting device having a fitting part that also serves as an electrical contact as an output terminal that fits into the fitted part, The fitting part of the lighting starting device is fitted into the fitted part of the heat radiating member through the through hole, so that the lighting starting device is electrically connected to and held by the heat radiating member. Light source device.