JPH0519793Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a spectrophotometer.

[Prior Art] A spectrophotometer uses a WI lamp, D ₂ lamp, or Xe lamp as a light source, and these are arranged in a light source room together with a condenser mirror.
A lid that can be opened and closed is attached to this light source chamber to facilitate lamp replacement from the outside.

[Problems to be solved by the invention] When such a spectrophotometer is used, the lamp is generally turned on continuously, so when used for a long time, the temperature of the entire light source chamber rises, and the lid also becomes very hot. temperature becomes high. For this reason, there is a problem in that when the lamp is replaced, touching the lid may cause unexpected burns, which is dangerous, and the user has to wait until the lamp cools down.

The present invention aims to solve the above-mentioned problems and provide a spectrophotometric system in which lamp replacement work can be carried out quickly and without danger.

[Means for Solving the Problems] For this reason, the present invention includes a heat reflecting plate that has a glossy surface and reflects light from the light source as a heat insulating member on the indoor side of the lid for replacing the light source lamp in the light source chamber. It was attached via.

[Function] This prevents the lid itself from being directly overheated by the radiant heat from the light source lamp, and
Even if the heat reflector becomes overheated, the heat is shielded by the heat insulating material, so the temperature rise is small and the lamp replacement work can be done quickly and without danger.

[Examples] Hereinafter, the present invention will be described in detail with reference to examples.

FIG. 1 is an external perspective view of a spectrophotometer according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the main body frame 1 with the cover 2 removed. In these figures, a light source chamber 3, a spectrometer section 4, a printed circuit board 5 on which electrical components are mounted, a fan 6 for heat radiation, and the like are arranged on a main body frame 1.

A lamp 3a and a condensing mirror 3b are arranged in the light source chamber 3, and a U-shaped heat reflecting plate 3c made of, for example, stainless steel and formed to have a glossy inner surface covers three outer surfaces excluding the outer surface. is surrounded. A hole 3d for passing the light from the lamp 3a focused by the condensing mirror 3b is formed on one surface of the heat reflection plate 3c on the side of the spectrometer section 4, and each surface of the hole 3d is provided inside the light source chamber. Small holes (not shown) are appropriately drilled for ventilation.

A lid 7 is attached to the cover 2 at a position above the light source chamber 3 for lamp replacement. The lid 7 has a heat reflecting plate, which is also L-shaped and has a glossy surface on its inner surface like a heat reflecting plate 3c, on the inner surface of an outer frame 7b, which is an L-shaped metal plate in which a slit hole 7a is formed to take in outside air. 7c is fixed.
As shown in FIG. 3, the reflector plate 7c is fixed to the outer frame 7b at several locations at its ends by screws 7d via heat insulating washers 7e made of a heat insulating material and spacers 7f. The lid 7 is fixed to the cover 2 with screws 7g.

A slit hole 2a formed in the cover 2 is an outlet for air exhausted from the fan 6.

The spectrophotometer of this embodiment has the above configuration, and when the power is turned on and the spectrophotometer is operated, the fan 6 rotates. Although the light source chamber 3 and the printed circuit board 5 generate heat during operation, the heated air inside the cover 2 is exhausted by the fan 6, and the outside air at room temperature flows in through the slit hole 7a. As a result, the light source chamber 3
And abnormal overheating of the printed circuit board 5 is prevented.

Further, since the light source chamber 3 is surrounded by the heat reflecting plates 3c and 7b, the radiant heat of the lamp 3a does not directly overheat the outside of the light source chamber 3 or the outer frame 7b.
Further, even if the heat reflecting plate 7c is overheated, the heat insulating washer 7e prevents heat conduction to the outer frame 7b.
As a result, when you hold the outer frame 7b in your hand to open and close the lid 7 and replace the lamp 3a, the temperature will not rise to the extent that you will get burned, unlike in the past.
This prevents danger and eliminates the need to wait for it to cool down.

[Effects of the invention] As described above, according to the invention, a heat reflecting plate having a glossy surface and reflecting light from the light source is attached via a heat insulating member to the indoor side of the lid for replacing the light source lamp. Therefore, the lid will not be directly overheated by the radiant heat from the light source lamp, and even if the heat reflector gets overheated, the heat will be shielded by the insulating material, so the temperature rise will be small and it will be easier to replace the lamp. Work can be done quickly and without danger.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a spectrophotometer according to an embodiment of the present invention, Fig. 2 is a plan view of the main body frame showing the arrangement of each part, and Fig. 3 is a cross section of the part where the heat reflector is attached to the outer frame. It is a diagram. 1...Body frame, 2...Cover, 2a, 7a
...Slit hole, 3...Light source chamber, 3a...Lamp,
3b...Collecting mirror, 3c, 7c...Heat reflecting plate, 3d...
... Hole, 4 ... Spectrometer section, 5 ... Printed circuit board, 6
...fan, 7...lid, 7b...outer frame, 7d, 7g...
...screw, 7e...insulating washer, 7f...spacer.

Claims (1)

[Claims for Utility Model Registration] (1) In a spectrophotometer having a lid that can be opened and closed for replacing the light source lamp in the light source chamber, the lid has a glossy surface on the indoor side to protect the light source from the light source. A spectrophotometer characterized in that a heat reflecting plate that reflects light is attached via a heat insulating member. (2) The spectrophotometer as set forth in claim 1 of the utility model registration, characterized in that it is equipped with a fan that exhausts superheated air within a light source chamber.