JPH03280324A - Reflector discharge lamp - Google Patents

Abstract

PURPOSE:To eliminate exposed part so as to ensure safety by providing a pin on the outer wall of a cover member for fitting a reflecting mirror, and by drawing a lead wire of an emission tube in the cover member, so as to connect the lead wire and the pin together in the cover member. CONSTITUTION:An emission tube 1 is fixed in the center of a reflecting mirror 3 such as one made of glass, with a bonding agent such as a cement 5, while a multi-layered film 3b is formed on the reflecting surface of the reflecting mirror 3, and only visible light (a) is reflected thereby and a heat ray (b) is absorbed therein. The reflecting mirror 3 is fitted in a bottomed cylindrical cover member 6, and a cement 8 is buried in the fitted part as a bonding agent. A heat-resistant insulator such as ceramics is used for the cover 6, and a pair of pins 10, 12 are provided on the outer wall of a bottom part 6a of the cover 6, while a lead wire 7 from one end of the emission tube 1 is connected to the pin 10, and a lead wire 15 guided from the other end is once drawn into the cover 6 between a peripheral part 3a and the cover 6, and is connected to the pin 12 in the cover 6. An exposed part is eliminated thereby, and safety is thus ensured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reflective discharge lamp, and in particular to a reflective discharge lamp that integrates a reflector with a lamp such as a metal halide lamp, a xenon lamp, or an ultra-high pressure mercury lamp. Regarding electric lights.

[Conventional technology]

Generally, reflective discharge lamps are known in which a lamp such as a metal halide lamp, a xenon lamp, or an ultra-high pressure mercury lamp is integrated with a reflector. This type of reflective discharge lamp is used as a light source for screen projection television equipment and the like.

FIG. 4 shows a conventional reflective discharge lamp. In the figure, reference numeral 1 indicates an arc tube, and the arc tube 1 is fixed to the center of a reflecting mirror 3 made of glass or ceramics with cement 5 interposed therebetween. A lead wire 7 led out from one end of the arc tube 1 is connected to a male threaded portion 9a of a base 9, and a terminal 13 is connected to this male threaded portion 9a via a nut 11. Further, a lead wire 15 led out from the other end of the arc tube 1 is connected to the peripheral edge 3a of the reflecting mirror 3 via a cap 17, and a female threaded portion 17a of the cap 17 is connected to a terminal via a bolt 19. 21 is connected.

[Problem to be solved by the invention]

By the way, in the conventional type, the terminals 21 are exposed on the peripheral edge 3a of the reflector 3, so when incorporating this reflective discharge lamp into a projection television device, etc., it is a hassle to avoid leakage of high-voltage pulses, etc. There is a problem that requires some ingenuity. Further, when connecting the terminals 13.21 from the outside, there is a problem that it is electrically dangerous because the male threaded portion 9a and the female threaded portion 17a are exposed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technology, to eliminate the need for troublesome measures to avoid leakage of high-voltage pulses, and to provide a method that avoids dangerous reflections when connecting between terminals. Our objective is to provide a shaped discharge lamp.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a reflective discharge lamp in which a light emitting tube is integrated into the center of a reflective mirror, in which the reflective mirror is fitted inside a cover member made of a heat-resistant insulator. , a pin is provided protruding from the outer wall of the cover member, a lead wire of the arc tube is drawn into the inside of the cover member, and the lead wire and the pin are connected inside the cover member.

[Function] According to the present invention, a pin is provided protruding from the outer wall of the cover member into which the reflecting mirror is fitted, and the lead wire of the arc tube is drawn into the inside of the cover member, and the lead wire and the pin are connected inside the cover member. Since the connecting terminals are connected, the connecting terminals are not exposed at the peripheral edge of the reflecting mirror, and therefore, there is no need to take measures to avoid leakage of high-voltage pulses. Further, if the terminal of the external connection line is made into a socket, the socket can be simply connected to the pin when connecting the wire, so the connection becomes easy and the replacement of the arc tube becomes extremely easy.

〔Example〕

Hereinafter, an embodiment of the reflective discharge lamp according to the present invention will be described with reference to FIGS. 1 and 2, in which the same parts as in FIG. 4 are denoted by the same reference numerals.

In FIG. 1, reference numeral 1 indicates an arc tube, and the arc tube 1 is fixed to the center of a reflecting mirror 3 made of glass or ceramics with cement 5 as an adhesive interposed therebetween. A multilayer film 3b is formed on the reflective surface of the reflecting mirror 3, and this multilayer film 3b has the property of reflecting only visible light a and absorbing heat rays.

Further, as is clear from FIG. 2, the reflecting mirror 3 is fitted inside a cover member 6 having a cylindrical shape with a bottom, and cement 8 as an adhesive is embedded in the fitting part. . This cover member 6 is made of a heat-resistant insulator such as ceramics.

A pair of pins 10.1 are provided on the outer wall of the bottom 6a of the cover member 6.
A lead wire 7 led out from one end of the arc tube 1 is directly connected to a pin 10. Also,
A lead wire 15 led out from the other end of the arc tube 1 connects to the reflecting mirror 3.
It passes between the peripheral edge 3a of the cover member 6 and the cover member 6, and is then drawn into the cover member 6, and is connected to the pin 12 inside the cover member 6.

According to the above configuration, since the connection terminals are not exposed on the peripheral edge 3a of the reflector 3 as in the conventional case, there is no need for troublesome measures to avoid leakage of high-voltage pulses, etc., and this discharge lamp can be projected. When incorporating it into a type television set or the like, it is only necessary to make a round hole in the wire plate, insert the cover member 6 into the hole, and fix it, making the work extremely simple.

Furthermore, if the terminals of the external connection wires are made into sockets, it is only necessary to connect the sockets to the pins 10 and 12 at the time of wiring, making the connection easy and the replacement of the luminous tube 1 extremely easy. Become. Furthermore, according to this connection method,
Since there are no electrically exposed parts, it is highly safe. Furthermore, if the bottom part 6a of the cover member 6 is formed into a lid shape (see FIG. 2), and this is fixed to the cover member 6 with adhesive or the like after connecting the connecting wire and the pin, The connecting wires are short and the wiring work is extremely easy.

FIG. 3 shows another embodiment, in which a plurality of ventilation holes 16 are bored in the outer periphery of a cover member 6 made of ceramics. Normally, when the outside of the reflecting mirror 3 is covered with the cover member 6, the interior space A (see FIG. 1) becomes extremely hot.

However, according to this embodiment, since the ventilation holes 16 are provided, the cooling effect in the interior space A can be enhanced.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a pin is provided protruding from the outer wall of the cover member into which the reflecting mirror is fitted, and the lead wire of the arc tube is drawn into the inside of the cover member. Since the lead wires and pins are connected with each other, the connection terminals are not exposed at the periphery of the reflector, and no measures are needed to avoid leakage of high-voltage pulses. Also,
If the terminals of the external connection wires are made into sockets, it is only necessary to connect the sockets to the pins when connecting the wires, making the connection easy and lamp replacement etc. extremely easy.

Furthermore, this connection method eliminates electrically exposed parts, making it safer.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a reflective discharge lamp according to the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a perspective view showing another embodiment, and FIG. 4 is a conventional reflective discharge lamp. FIG. 2 is a longitudinal cross-sectional view showing a discharge lamp. 1... Arc tube, 3... Reflector, 3a... Multilayer film,
5゜8...Cement, 6...Cover member, 6a...
・Bottom, 7°15... Lead wire, 10.12... Pin. Crane 4

Claims (1)

[Claims] In a reflective discharge lamp integrally configured with an arc tube built into the center of a reflector, the reflector is fitted into a cover member made of a heat-resistant insulator, and a pin is provided protruding from the outer wall of the cover member. A reflective discharge lamp characterized in that the lead wire of the arc tube is drawn into the inside of the cover member, and the lead wire and the pin are connected inside the cover member.