JPH04482Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to lighting devices such as spot lights that use halogen lamps as light source lamps.The purpose of this invention is to extend the service life of the halogen lamps and to make the device compact The purpose is to provide equipment.

(Background of the Idea) In illumination devices such as spot lights that require high illuminance, a halogen lamp a having high brightness as shown in FIG. 2 is used as a light source lamp.

This halogen lamp a has discharge electrodes d and d housed in electrode cover tubes c and c extending in opposite directions from a lamp bulb b, respectively, and the tips of both discharge electrodes d and d are located inside the lamp bulb e. The two electrode cover tubes c, c are opposed to each other with a discharge gap f maintained between them, and the tips of the two electrode cover tubes c, c are sealed with electrode caps g, g, respectively, and halogen gas is sealed inside.

This halogen lamp a had a relatively short life and had to be replaced frequently during use.

(Prior art and its problems) Conventionally, it has been thought that the short life of the halogen lamp a is because the tips of the two discharge electrodes d, d are overheated to a high temperature, causing thermal deterioration of the two discharge electrodes d, d. Therefore, it was considered necessary to cool the lamp bulb e, where the tips of the discharge electrodes d and d are located, with as large an air volume as possible.

Therefore, in the conventional lighting device h shown in FIG. 3 using a halogen lamp a, a blower i directed toward the lamp bulb e was used, and the lamp bulb e was cooled with a large amount of cooling air from the blower i. .

However, even with this cooling method using the blower i, the service life of the halogen lamp a was short.

Moreover, since the blower i is relatively large, the overall device shape is large, making it inconvenient to handle.

Further, as in Japanese Utility Model Publication No. 54-5787 (Welding, Melting, and Heat Processing Apparatus Using Light Energy), a technique is disclosed in which a cooling fluid is caused to flow from one end of an arc thermal light source lamp to the other end.

This technique will be explained based on FIG.

Reference numeral 101 denotes an outer case with an opening at the bottom, and a bottom plate 102 is fixed to the opening at the lower end of the outer case 101.
A light transmitting body 103 is provided in a portion through which light energy passes.

A partition plate 10 is provided in the middle part of the outer case 101.
4 is provided, and an elliptical reflector 105 is attached to the lower surface of this partition plate 104, and this ellipse reflector 10
Arc heat light source lamp 108 in the first focal point F ₁ part of 5
and an opening 109 for feeding cooling fluid into the bottom of the elliptical reflector 105.
is provided.

A jet nozzle 111 is fitted into this opening 109, and fluid is supplied to the arc heat light source lamp 108 from a fluid jet device 110 provided at the upper part of the partition plate 104.
It is designed to be injected into the

The fluid that has cooled the arc thermal light source lamp 108 is discharged from between the bottom plate 102 and the elliptical reflector 105 to the outside of the outer case 101 by a fluid ejection device 112 .

At this time, the suction port 114 of the fluid ejection device 112
If it is installed toward the end of the arc thermal light source lamp 108, a large amount of the cooling fluid will collide with the end, so cooling can be achieved most efficiently.

The heating processing device having such a configuration has a second
Excessive heating due to reflection of light energy from the workpiece placed near the focal point _F2 can be efficiently prevented.

However, this technique is aimed at preventing excessive heating of the lamp from reflection of light energy from the workpiece, and only uses a single cooling device to move the lamp from one end to the other. The technology was only capable of efficiently sending cooling fluid up to the point where it was needed.

In other words, this technology uses cooling fluid sent from one end and heated by the lamp bulb to cool the other end; in halogen lamps, this heated cooling fluid flows through the electrode tube and electrode cap. The fluid used to cool the air was hot air over 200°C, which should be excluded.

Therefore, the cooling mechanism in this heating processing device is not a technology that can be used in lighting devices that use halogen lamps, and there is no point in cooling only the electrode tube and electrode cap at one end, and the service life of the halogen lamp is limited. It was not a technology that could be used to extend lifespan.

(Issues to be solved by the invention) In view of the above-mentioned circumstances, the industry has desired the creation of a lighting device that can extend the useful life of a halogen lamp and make the device more compact.

(Progress of the invention) The inventor of this invention believes that the reason why the halogen lamp a is short-lived is not due to thermal deterioration of the discharge electrodes d, but rather due to the materials of the electrode cover tubes c, c and the electrode caps g, g. Since they are made of glass and metal, normally if the temperature exceeds 200℃, the sealing condition at the tips of electrode cover tubes c and c will be insufficient due to the difference in thermal expansion, and even if there is a small gap between electrode cover tube c and electrode cap. It was discovered that even if it occurs in the sealed part of the halogen lamp a, it is because the halogen gas that has been sealed in the lamp leaks from the gap over time.
is cooled by the electrode caps g, g rather than by the lamp bulb e.
We came up with this idea because we thought it was necessary to focus on this.

(Means for Solving the Problems) In this invention, a halogen lamp is provided, in which the tips of front and rear electrode cover tubes extending in opposite directions from a lamp bulb are sealed with electrode caps, and A curved reflector provided behind the lamp bulb of the lamp, an air guide case provided behind the curved reflector, and an intake propeller fan provided on the rear top plate of the main body case that communicates with the air guide case. a first cooling air device consisting of;
This lighting device consists of a second cooling air device, which is an intake port provided on the front bottom plate of the main body case, and an exhaust propeller fan provided on the front top plate of the main body case. The lamp is installed facing forward and backward, and a lamp insertion hole is drilled in the center of the curved reflector provided behind the lamp bulb of the halogen lamp, and the air flows from the intake propeller fan provided behind the curved reflector. A lamp insertion hole opposite to the lamp insertion hole is formed in the air guide case through which the cooling air of the halogen lamp is guided, and a rear electrode cover tube of the halogen lamp leaves a ventilation gap in each of the lamp insertion hole and the lamp insertion hole. At the same time, the rear electrode cap is inserted into the air guide case, and the intake port is disposed below the front electrode cap, and the exhaust propeller fan is disposed above the front electrode cap. All of the above problems are solved by providing a lighting device.

(Example) An example of this invention will be described based on the drawings.

1A to 1C are diagrams illustrating an illumination device according to an embodiment of this invention, and in the figures, 1 indicates a spotlight as the illumination device.

First, the configuration of the spotlight 1 will be explained.

2 is the main body case.

Inside the main body case 2, a halogen lamp 3 is installed as a light source lamp in the front-rear direction.

The halogen lamp 3 includes electrode cover tubes 5 extending from the lamp bulb 4 in opposite directions.
Discharge electrodes 6, 6 are housed in the tubes 5, respectively, and the tips of the discharge electrodes 6, 6 are opposed to each other with a discharge gap 7 held within the lamp bulb 4, and the electrode cover tubes 5, 5
The tips of each are sealed with electrode caps 8, 8, respectively, and halogen gas is sealed inside.

In this invention, a xenon lamp or the like which is heated to a high temperature can also be used in the same way as a halogen lamp.

A parabolic curved reflecting mirror 9 is disposed behind the lamp bulb 4, and a lamp insertion hole 10 is formed in the center thereof.

A wind guide case 12 is arranged behind the curved reflector 9 to guide the cooling air from the intake propeller fan 11.

The intake propeller fan 11 is attached to the lower surface of the top plate 13 of the main body case 2, and the vertical axis 1 with respect to the top plate 1
Rotate around 4.

A lamp insertion hole 15 is formed in the air guide case 12 and is opposed to the lamp insertion hole 10 of the curved reflector 9.

The intake propeller fan 11 and the air guide case 12 form a first cooling air device.

This first cooling air device is a device that specifically cools the rear electrode cover tube 5 and the rear electrode cap 8.

The electrode cover tube 5 at the rear of the halogen lamp 3 is inserted into the lamp insertion hole 10 and the lamp insertion hole 15.
are inserted in series leaving ventilation gaps 16 and 17, respectively, and the rear electrode cap 8 is inserted into the ventilation case 12.

An intake port 18 is located below the electrode cap 8 at the front.
However, an exhaust propeller fan 19 is provided above.

The intake port 18 has a parallel horizontal groove shape and is formed in the bottom plate 20 of the main body case 2.

This intake port 18 is a second cooling air device, and includes a front electrode cover tube 5 and a front electrode cap 8.
This is a device that specifies and cools the

The exhaust propeller fan 19 is attached to the upper surface of the top plate 13 of the main body case 2 and rotates around a vertical axis 21 with respect to the top plate 13.

In addition, in this spotlight 1, the base end side cover body 2
Lamp attachment/detachment operation lever 2 exposed by opening 2
3 to engage and disengage the rear electrode cap 8 of the halogen lamp 3 from the collector chuck 24, replace the halogen lamp 3 through the open opening of the windshield 25, and adjust the forward/backward movement of the halogen lamp 3 using the forward/backward adjustment bolt 26. and then tilt plate 2
The mounting angle of the halogen lamp 3 is adjusted by tilting the tilt plate 27 operated by four tilt adjustment bolts 28 located at the four corners of the lamp 7.

The structure of the spotlight 1 according to an embodiment of this invention is as described above, and the method of using the same will be explained next.

When lighting is performed using the spotlight 1, the halogen lamp 3 is energized, and the light emitted from the halogen lamp 3 is reflected by the curved reflector 9 and irradiated forward through the windshield 25.

At this time, the intake propeller fan 11 and the exhaust propeller fan 19 are driven, and the outside air introduced by the intake propeller fan 11 is passed from inside the ventilation case 12 through the ventilation gaps 16 and 17 as the first cooling air 29. Exit towards the exhaust propeller fan 19,
In the process, the rear electrode cap 8, the rear electrode cover tube 5, and the lamp bulb 4 are cooled in this order.

On the other hand, the outside air taken in through the intake port 18 escapes as a second cooling air 30 toward the exhaust propeller fan 19, and in the process, the front electrode cover tube 5 and the front electrode cap 8 are cooled.

The first cooling air 29 reaches a high temperature of 200°C or more after cooling the high-temperature lamp bulb 4, but the second cooling air 30 passes around the front electrode cap 8 and the front electrode cover tube 5. Therefore, the second cooling air 3
0 becomes an air curtain, and the high-temperature first cooling air 29 is discharged in the direction of the exhaust propeller fan 19 without reaching the front electrode cap 8 and the front electrode cover tube 5.

(Effect of the invention) This invention consists of a halogen lamp in which the tips of the front and rear electrode cover tubes extending in opposite directions from the lamp bulb are sealed with electrode caps, and the back of the lamp bulb of this halogen lamp. A first cooling system consisting of a curved reflector provided on the main body case, an air guide case provided behind the curved reflector, and an intake propeller fan connected to the air guide case and provided on the rear top plate of the main body case. The wind device and the second air intake port provided on the front bottom plate of the main body case.
This lighting device consists of a cooling air device and an exhaust propeller fan provided on the front top plate of the main body case.A halogen lamp is installed inside the main body case facing forward and backward, and the lamp bulb of this halogen lamp A lamp insertion hole is bored in the center of the curved reflector provided behind the curved reflector, and the lamp insertion hole is provided in the air guide case through which the cooling air from the intake propeller fan provided behind the curved reflector is guided. A lamp insertion hole is formed facing the lamp insertion hole, and the rear electrode cover tube of the halogen lamp is inserted into the lamp insertion hole and the lamp insertion hole in series, leaving a ventilation gap, and the rear electrode cap is inserted into the ventilation case. The lighting device is inserted into the front electrode cap, and has the intake port located below the front electrode cap, and the exhaust propeller fan located above the front electrode cap, so that the following effects can be achieved.

The outside air introduced by the intake propeller fan exits as the first cooling air from inside the air guide case through the ventilation gap toward the exhaust propeller fan, and is then sent to the rear electrode cap, rear electrode cover tube, and lamp bulb in that order. For cooling, completely unheated air is supplied to the rear electrode cap, which is made of metal and has a large coefficient of thermal expansion and requires the most cooling, so that the rear electrode cap is cooled most intensively.

On the other hand, the outside air taken in through the intake port escapes as second cooling air toward the exhaust propeller fan, cooling the front electrode cover tube and the front electrode cap.

Moreover, the first cooling air, which has become hot after passing through the high-temperature lamp bulb, does not become an air curtain and reach the front electrode cover tube and the front electrode cap. The front electrode cap is completely unimpeded by the first cooling air that has become hot after passing through the high-temperature lamp bulb, and both electrode caps are efficiently and efficiently cooled.
There is no leakage of the sealed halogen gas, and the life of the halogen lamp is extended.

Furthermore, unlike conventional cooling methods, the lamp bulb is not supercooled with a large amount of air from a blower, but rather
Since we have adopted an effective cooling method that focuses on cooling the electrode cap, there is no need to generate a large amount of air, and by using a propeller fan, effective results can be obtained over the life of the halogen lamp, and the overall shape of the device can be reduced. is more compact and easier to handle.

[Brief explanation of drawings]

Fig. 1A is a front view of a spot light according to an embodiment of this invention, Fig. 1B is a side view of the same, Fig. 1C is a sectional view taken along line C-C in Fig. 1A, and Fig. 2 is a background explanatory diagram of the invention. , FIG. 3 is an explanatory diagram of the prior art, and FIG. 4 is an explanatory diagram of the prior art. 1...Spotlight, 2...Body case, 3
...Halogen lamp, 4...Lamp bulb, 5...Electrode cover tube, 8...Electrode cap, 9...
Curved reflector, 10... Lamp insertion hole, 11... Intake propeller fan, 12... Wind guide case, 15
... Lamp insertion hole, 16 ... Ventilation gap, 17 ...
Ventilation gap, 18...Intake port, 19...Exhaust propeller fan.

Claims (1)

[Scope of utility model registration request] A halogen lamp, each of which has front and rear electrode cover tubes extending in opposite directions from the lamp bulb, each end of which is sealed with an electrode cap, and a curved reflector provided behind the lamp bulb of the halogen lamp. , a first cooling air device consisting of an air guide case provided behind the curved reflector and an intake propeller fan connected to the air guide case and provided on the rear top plate of the main body case; A lighting device consisting of a second cooling air device, which is an intake port provided on the bottom plate, and an exhaust propeller fan provided on the front top plate of the main body case, and a halogen lamp is installed inside the main case in the front and rear direction. A lamp insertion hole is drilled in the center of the curved reflector installed behind the lamp bulb of this halogen lamp, and the cooling air from the intake propeller fan installed behind the curved reflector is A lamp insertion hole opposite to the lamp insertion hole is formed in the air guide case, and the rear electrode cover tube of the halogen lamp is inserted in series into the lamp insertion hole and the lamp insertion hole, respectively, leaving a ventilation gap. and a rear electrode cap is inserted into a wind guide case, and the intake port is disposed below the front electrode cap, and the exhaust propeller fan is disposed above the front electrode cap.