JPH03272509A - Illumination fixture - Google Patents

Abstract

PURPOSE:To embody an illumination fixture in a simple structure and decrease the number of parts used without imposing burden on a lightweight mirror by supporting a lamp holder by an electricity feeder mounted on the base, and supplying power to a light source through the electricity feeder. CONSTITUTION:A socket 40 is held, with which a light source 43 arranged oppositely in optical terms to a lightweight mirror 31 is connected, and therein are supported a lamp holder 33 situated above the lightweight mirror 31 and another lamp holder 33 mounted on the base 21, and further an electricity feeder 32 is furnished to feed low voltage power to the light source 43. That is, over the lightweight mirror 31 is arranged the lamp holder 33 which holds the socket 40 by the electricity feeder 32 installed on the base 21, wherein the light source 43 is fitted in the socket 40. The low voltage power from the power supply part 2 is fed to this socket 40 in connection with the light source 43 through the electricity feeder 32. This allows accomplishing the illumination fixture in a simple structure and with a lesser number of parts in use.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a lighting fixture using a lightweight mirror.

(Prior Art) This type of conventional lighting equipment uses electric power from a commercial AC power source to light up light sources that are optically disposed in opposition within a mirror.

(Problems to be Solved by the Invention) However, in the conventional lighting equipment described above, since the mirror is heavy, a member that holds the lighting equipment is made of a relatively strong member. Further, the power supply line that supplies power to the light source is used only for supplying power. Therefore, there are problems in that the structure becomes complicated and the number of parts increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture that has a simple structure and can reduce the number of parts.

[Structure of the invention]

(Means for Solving the Problems) The lighting device according to claim 1 includes a base, a lightweight mirror attached to the base and formed of a thin member, and a light source optically opposed to the lightweight mirror. a lamp holder that holds a socket to be connected and is located above the lightweight mirror;
The power supply body is attached to the base body, supports the lamp holder, and supplies low voltage to the light source.

The lighting device according to claim 2 includes: a base body provided with a lightweight mirror formed of a thin-walled member that is optically opposed to the light source; a locking body connected to a power supply section that supplies a low voltage; The power supply wire is attached to a base body and has an intermediate portion suspended from the locking body to supply power to the light source, and the hanging position of the power supply wire can be varied to change the angle of the base body.

(Function) In the lighting device according to the first aspect, a lamp holder for holding a socket to which a light source is attached is disposed and held above a lightweight mirror by a power supply body attached to a base. Further, low voltage power from the power supply unit is supplied to the socket to which the light source is connected via the power supply body.

In the lighting device according to the second aspect of the invention, a base body provided with a lightweight mirror to which a light source is optically opposed is held by a power supply wire suspended from a locking body. Then, by changing the hanging position of this power supply wire, the angle of the base body is changed. Further, low voltage power from the power supply unit is supplied to the socket connected to the light source via the power supply wire.

(Example) Hereinafter, one example of the lighting fixture of the present invention will be described with reference to the drawings.

In Figures 1 and 2, reference numeral 1 denotes a mounting body that is attached to the ceiling, etc., and a power supply unit 2 is built into the mounting body 1. A bent conductive hanging rod 3 is attached, the proximal end is electrically connected to the power supply section 2, and the lower horizontal tip is
A locking body 5 is attached to electrically and mechanically connect the conductive flexible power supply wire 4.

As shown in FIG. 3, this locking body 5 is formed into a cylindrical shape with a feed wire insertion hole 11 in the diameter direction and a thread 12 cut inside, and is fixed to the hanging rod 3 with a set screw 13. After inserting the power supply wire 4 into the power supply wire insertion hole 11, a bolt 14 is inserted into the screw thread 12 and tightened to fix the power supply wire 4. Note that the hanging rod 3 and the power supply wire 4 are electrically connected.

Furthermore, stoppers 16 are provided at both ends of the power supply wire 4, as shown in FIG. The power supply wire 4 is connected to an upper small-diameter hole IE17 formed in the axial direction and a large-diameter hole wider than the small-diameter hole 17 with a screw thread formed in communication with the small-diameter hole IE17. It is inserted into a connecting body 19 having a section 18, and a stopper 16 is locked with a set screw 20. Reference numeral 21 denotes a substrate as a base, and this substrate 21 has a substantially square plate shape, and is sandwiched between two aluminum plates 23 with a circular irradiation hole in the center and mounting holes 22 in the four corners. , a plastic washer 24 is inserted and formed. Then, insert the bolt 25 into the mounting hole 22, screw the bolt 25 into the thread of the large diameter hole 18 of the cap body 19, and connect the power supply wire 4 to the board electrically and mechanically. It is connected.

Furthermore, a dichroic mirror 31 is attached to the upper surface of the substrate 21 as a lightweight umbrella-shaped mirror made of plastic. Furthermore, among the four cap bodies 19, two cap bodies 1 to which different power supply wires 4 are connected
9 is attached with a conductive rod power supply body 32 which is bent into a single character shape and curved along the outline of the umbrella-shaped dichroic mirror 31. At the tip of this power supply body 32, an umbrella-shaped A lamp holder 33 located above the dichroic mirror 31 is attached so that the lamp holder 33 does not apply a load to the umbrella-shaped dichroic mirror 31. This lamp holder 33 has an upper lamp holder part 34 and a lower lamp holder part 3 as shown in FIG.
5, the tip of the power supply body 32 is held in the clamping notch recesses 36 and 37 formed in the upper lamp holder part 34 and the lower lamp holder part 35, respectively, and is supported by the power supply body 32. Attach the U-shaped connection piece 38 to the screw 3
9, the upper lamp holder part 34
and a lower lamp holder portion 35 are attached. In addition, a porcelain socket 40 is attached to the lower lamp holder portion 35 with a screw 4.
1 and holds a ceramic socket 40, and the tip of the power supply body 32 is electrically connected to the ceramic socket 40 by a conductive wire 42. And porcelain socket 40
A lamp 43 as a light source is connected to the dichroic mirror 31, which is optically opposed to the umbrella-shaped dichroic mirror 31. Furthermore, this dichroic mirror 31 and lamp 43
A mirror 44 for indirect illumination, which is a dichroic mirror, is attached to the substrate 21 via a support piece 45 opposite to the substrate 21 .

These mirrors 31 and 44 have a wall thickness of 1, for example.
A light-absorbing layer made of titanium carbide, silicon carbide, or a chromium compound formed on a substrate made of a light-transmitting material such as 25#- heat-resistant plastic or aluminum or a non-light-transmitting material, and this light-absorbing layer. It consists of an optical multilayer film formed on the surface of. This optical multilayer film is made of, for example, a titanium oxide (TiO□) film layer and a silicon oxide (SiO2) film layer.
It is constructed by alternately laminating film layers, and depending on the thickness and number of these film layers, visible light is reflected and infrared light is transmitted among the luminous flux from the lamp 43. It has become. In addition, if it is made of translucent plastic, it may be made to transmit light to the outside.

Next, the power supply section 2 will be explained with reference to FIG.

This power supply section 2 is connected to a commercial AC power source 51 via a connection plug (not shown), and to a filter 53 via a fuse 52. This filter 53 is composed of a Zener diode 54, a capacitor 55, an inductor 56, and a Zener diode 57. Also,
A rectifier circuit 58 such as a diode bridge is connected between the output terminals of this filter 53, and between the output terminals of this rectifier circuit 58, the collector-emitter of a transistor 61, the resistor 62, the collector-emitter of a transistor 63, and a resistor are connected. 64 is connected, and feedback diodes 65 and 66 are connected between both ends of the transistor 61 and the resistor 62, and between both ends of the transistor 63 and the resistor 64, respectively.

One end of the primary winding 67M of the saturable current transformer 67 is connected to the connection point of the feedback diode 65, 66, and the saturable current transformer is connected between the base of the transistor 61 and the emitter of the transistor 61 via the resistor 62. A first secondary winding 67b of the saturable current transformer 67 is connected, and a second secondary winding 67c of the saturable current transformer 67 is connected between the base of the transistor 63 and the emitter of the transistor 63 via the resistor 64. . Furthermore, the second secondary winding 67c includes an auxiliary winding 67d.
A series circuit of a thyristor 68 and a thyristor 68 are connected, and the gate of the thyristor 68 is connected to the emitter of the transistor 63 via a Zener diode 69.
A parallel circuit of a resistor 71 and a capacitor 72 is connected between the gate and cathode of the transistor 8. In addition, the rectifier circuit 58
A series circuit of a resistor 73 and a capacitor 74 is connected between the output terminals of the resistor 73 and a capacitor 74. A diode 75 is connected between the connection point of the resistor 73 and the capacitor 74 and the collector of the transistor 63. A constant voltage element 76 is connected between the connection point and the base of the transistor 63. Furthermore, the rectifier circuit 5
Between the output terminals of 8, two voltage dividing capacitors 81,
82 are connected in series, and the connection point of these capacitors 81 and 82 is connected to one end of the input winding 83 of an output transformer 83 for step-down, and the other end of this input winding 83M is connected to a saturable current transformer. 67 is connected to the other end of the primary winding 67M. The lamp 43 is connected to the output winding 83b of the output transformer 83 via the power supply wire 4.4 and the power supply body 32°32.

Next, the operation of the above embodiment will be explained.

First, the hanging positions of the two power supply wires 4, 4 are set, and the irradiation angle is varied, for example, as shown in FIG.

In this state, when the power is turned on, the 100μ AC from the commercial AC power supply 51 passes through the filter 53 and is rectified by the rectifier circuit 58. When the capacitor 74 is charged, the constant voltage element 76 is turned on and the transistor A base current is supplied to transistor 63, and transistor 63 is turned on. Then, the primary winding 671 of the saturable current transformer 67 becomes saturated, turning on the transistor 61, and then turning on the transistor 61 and the transistor 62 alternately, so that the output winding 83b of the output transformer 83 is turned on. A low voltage of 12V is induced, and the lamp 43 is lit at high frequency via the power supply wire 4 and the power supply body 32.

The light from the lamp 43 is reflected by a mirror 44 for indirect illumination, and then reflected again by an umbrella-shaped dichroic mirror 31. These mirrors 31 and 44 reflect visible light and transmit infrared rays for irradiation. Prevent things from heating up.

Then, for example, when the two power supply wires 4, 4 are short-circuited, the Zener diode 69 turns on and the thyristor 6
8 is turned on, the base current of the transistor 63 is stopped, the transistor 63 is turned off, and the output from the power supply section 2 is stopped, thereby preventing the risk of a short circuit.

Further, in the above embodiment, the output of the power supply section is stopped in the event of a short circuit, but the output may be simply reduced without being stopped.

〔Effect of the invention〕

According to the lighting device according to claim 1, the lamp holder is supported by the power supply body attached to the base body, and power is supplied to the light source via the power supply body, so that the light source can be easily and easily installed without imposing any load on the lightweight mirror. It is possible to have a simple configuration and reduce the number of parts.

According to the lighting device according to claim 2, by suspending the power supply wire attached to the base from the locking body, the structure is simple and the number of parts is reduced without putting a burden on the lightweight mirror. You can also change the angle.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the lighting fixture of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a partially exploded view showing the locking body of the above, and Fig. 4 is a partial cross section showing the board of the above. Figure 5 is a sectional view showing the above lighting fixture, Figure 6 is an exploded view showing the lamp holder, Figure 7 is a circuit diagram showing the power supply section, and Figure 8 is a sectional view showing the above lighting fixture.
The figure shows the state of use of the same as above. 2. Power supply unit, 4. Power supply wire, 5. Locking body,
21...Substrate as a base body, 31...Dichroic mirror as a lightweight mirror, 32...Power supply body, 33...Lamp holder, 40...Socket, 43...Lamp as a light source.

Claims (2)

[Claims] (1) A base, a lightweight mirror attached to the base and made of a thin member, and a lamp holder located above the lightweight mirror and holding a socket to which a light source is connected optically opposite the lightweight mirror. and a power supply body that is attached to the base body, supports the lamp holder, and supplies low voltage to the light source. (2) a base body provided with a lightweight mirror formed of a thin-walled member that is optically opposed to the light source; a locking body connected to a power supply unit that supplies a low voltage; 1. A lighting device comprising: a power supply wire whose intermediate portion is suspended from a stopper body to supply power to the light source; and the angle of the base body can be changed by changing the hanging position of the power supply wire.