JPH0740972Y2 - Lamphouse for optical equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a natural convection cooling type lamp house which is used by being attached to an optical device body such as a microscope or a measuring instrument.

[Problems to be solved by conventional techniques and devices]

FIG. 4 shows a configuration example of a conventional lamp house of this type. In the figure, reference numeral 1 has upper and lower openings 1a and 1b and an opening 1c on the optical axis to be connected to the main body of the optical device. Outer frame,
2 is an opening 2a, 2b corresponding to the opening 1a, 1b and 1c
An inner frame 3 having 2c and fixed inside the outer frame 1, 3 is a shading plate attached so as to block a certain area of the opening 2a of the inner frame 2, and 4 corresponds to each opening 2b. The light-shielding fins 5 formed as described above are heat-absorbing filters fitted in the openings 2c so as to be arranged on the optical axis, and 6 is a lamp for a light source. In such a lamp house, when the lamp 6 is turned on, the direct light of the lamp 6 is all reflected by the inner frame 2, the light shielding plate 3 and the light shielding fins 4, so that there is no leakage of light outside the lamp house except in the optical axis direction. The reflected light is higher than the following. On the other hand, part of the heat generated by lighting the lamp 6 is absorbed by the outer frame 1 and the inner frame 2, and part of the heat is generated by the opening.
It is discharged to the outside of the lamp house through 2a, 1a and 2b, 1b.

By the way, in order to prevent the direct light of the lamp 6 from leaking to the outside of the lamp house, it is necessary to enlarge the light-shielding plate 3 to reduce the area of the opening 2a and to dispose the light-shielding plate 3 at a position close to the lamp 6. However, if you do this
The generated heat becomes difficult to be discharged to the outside of the lamp house and accumulates inside the inner frame 2, so that the temperature of the lamp 6 itself becomes extremely high and its life is shortened, and also the heat absorption filter 5 is increased by the temperature rise. There are problems such as deterioration. Further, the light reflected by the inner surface of the inner frame 2 near the light shielding plate 3 leaks to the outside through the opening 1a as it is.

In order to solve such an inconvenience, as shown in FIG. 5, a plurality of light-shielding plates 3, 3 ', 3 ... Are horizontally provided above the lamp 6 to improve the light-shielding effect. Although proposed, it is possible to almost eliminate the light leaking above the lamp house, but on the contrary, there is a drawback that the generated heat is more likely to be trapped in the lamp house. Also, the sixth
Even in the case of providing a large number of light-shielding plates 3 that are bent in a V shape as shown in the figure, the effect of preventing the leakage of direct light is obtained, and therefore the arrangement interval is narrow and the bending is small. Since a large number of light-shielding plates 3 having a large angle are provided, there is a problem that the flow of air in the lamp house is rather deteriorated and the cost is increased.

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a lamp house for an optical device, which has an excellent light shielding effect and can eliminate the influence of heat generation of the lamp.

[Means for Solving the Problems]

In the lamp house for optical equipment according to the present invention, a plurality of partition plates are suspended above the lamp and an inclined plate is disposed below the lower part of each partition plate, and the horizontal plane projection length of the inclined plate is the partition plate. The interval is set to 1.5 times or less.

Further, the partition plate can be made of a honeycomb member.

[Action]

When the lamp for the light source in the lamp house is turned on, its direct light, especially the light directed upwards of the lamp house, is reflected by the inclined plate first, and is further reflected by the partition plate arranged in the vertical direction, Direct light does not leak to the outside of the lamp house, but only reflected light of the second or higher order. On the other hand, the heat generated by lighting the lamp is released to the upper part of the lamp house by the natural convection of air from the bottom part to the top part of the lamp house, but at that time, the inclined plate and the partition plate above the lamp should not interfere with the air convection. The heat of the lamp is completely discharged to the outside without being accumulated in the lamp house.

〔Example〕

Hereinafter, a first embodiment of a lamp house for an optical device according to the present invention will be described with reference to FIG. In the figure, 7 is a plurality of partition plates that are suspended above the light source lamp 6 in the inner frame 2 at regular intervals, and 8 is an inclined plate formed by bending the lower ends of the partition plates 7. The horizontal plane projection length of the inclined plate 8 is set to be about 1.5 times the interval between the partition plates 7 or less.
Since the other configurations are basically the same as those of the above-described conventional example, the description thereof will be omitted.

Since the lamp house for optical equipment according to the present invention is configured as described above, when the lamp 6 is turned on, the light in the optical axis direction passes through the heat ray absorption filter 5 and becomes a light ray other than infrared rays. (Not shown). or,
Direct light traveling upward from the lamp house is projected onto the inclined plate 8 first, but since the horizontal projection length of this inclined light 8 is larger than the interval between the partition plates 7, most of it is reflected by the inclined plate 8. Be punished. Then, the direct light which is not reflected by the inclined plate 8 and goes further upward is reflected by the partition plate 7 and the inner surface of the inner frame 2 and attenuated, and leaks to the outside of the lamp house through the opening 1a of the outer frame 1. . In this way, the leaked light is separated by the partition plate 7 and the inner frame 2 before it leaks to the outside of the lamp house.
It is greatly weakened because it is reflected multiple times by.
Therefore, by providing the inner surfaces of the partition plate 7 and the inner frame 2 with black matte or the like, it is possible to substantially prevent light leaking above the lamp house. Further, the direct light traveling downward of the lamp house is completely blocked by the light shielding fins 4 of the inner frame 2.

On the other hand, the heat generated by lighting the lamp 6 slightly raises the temperature of the lamp house, but the air flowing in through the openings 1b, 2b and flowing upwards through the openings 2a, 1a. It is released to the outside of the lamp house by natural convection. In this case, the projected length of the inclined plate 8 in the horizontal plane is about 1.5 times or less the interval between the partition plates 7, that is, a sufficient gap is formed without blocking the space between the partition plates 7, so that the convection of such air is prevented. A smooth flow can be formed without obstruction, so that the heat generated by the lamp 6 can be efficiently emitted. In this way, the side of the partition plate 7 close to the lamp 6 is appropriately bent and installed in the inner frame 2, so that the heat generated by the lighting of the lamp 6 is released to the outside of the lamp house to suppress the temperature rise of the lamp itself. In addition to being able to form natural convection, it is possible to prevent light leaking to the outside of the lamp house.

FIG. 2 shows a second embodiment of the lamp house for optical equipment according to the present invention. In this example, a slanting plate 8'is suspended in the inner frame 2 and is arranged below the partitioning plates 7'corresponding to the partitioning plates 7 '. Although formed on the body, it is possible to smooth the natural convection of air and prevent leaked light, as in the case of the first embodiment.

In each of the above embodiments, instead of the partition plate 7 or 7 ', a honeycomb member having openings at both ends as shown in FIG. 3 may be suspended in the inner frame 2. By using it, the same effect as the above can be obtained.

The numbers of the partition plates 7 and 7'and the inclined plates 8 and 8'are not limited to the examples shown in the figures, and may be increased or decreased as necessary. Further, instead of the light shielding fin 4, a partition plate 7
Similarly to the inclined plate 8, a partition plate bent so as to have a vertical portion and an inclined portion may be arranged so as not to prevent natural convection of air to be formed.

[Effect of device]

As described above, according to the present invention, the heat generated by the lamp is smoothly discharged to the outside of the lamp house without obstructing the air flow in the lamp house, so that the temperature rise of the lamp itself is suppressed and the life of the lamp is improved. In addition, the temperature rise around the lamp house can be suppressed.
Further, by combining the partition plate and the inclined plate, a large effect of preventing light leakage can be obtained with a small number of sheets, so that there is an advantage that the structure can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a lamp house for optical equipment according to the present invention, FIG. 2 is a vertical sectional view of a second embodiment of the lamp house, and FIG. 3 is a partition plate according to the present invention. FIG. 4, FIG. 5, FIG. 5 and FIG. 6 are longitudinal sectional views of a conventional lamp house for optical equipment. 1 ... Outer frame, 2 ... Inner frame, 4 ... Shading fins, 5 ...
Heat ray absorption filter, 6 ... Lamp, 7,7 '... Partition plate, 8,8' ... Inclined plate.

Claims (2)

[Scope of utility model registration request] 1. A plurality of partition plates are suspended above a lamp, and an inclined plate is disposed below the lower part of each partition plate, and the horizontal projection length of the inclined plate is 1.5 times the interval between the partition plates. A lamp house for optical equipment configured as follows. 2. The lamp house for an optical device according to claim 1, wherein the partition plate is made of a honeycomb-shaped member.