JPS5914838A - Light source apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a light source device used as a light source in, for example, an endoscope.◎ When an endoscope is used to observe the inside of a body cavity, this endoscope can be used as a light source through its universal cord. The endoscope is connected to a light source device, and the interior of the body cavity is illuminated by guiding illumination light output from the light source device into the endoscope and emitting it from the distal end of the insertion section. Therefore, in the above-mentioned light source device, the lamp is arranged inside the case, and the light from the lamp is focused and guided to the light guide fiber in the above-mentioned unidirectional cord through an optical system consisting of a lens, etc. It is composed of

Incidentally, since the lamp of the light source device is desired to have a high output in order to improve the degree of illumination inside the body cavity, the amount of heat generated from the lamp is large. For this reason, in the past, a cooling fan was placed near the lamp, and this cooling fan cooled the rung and its vicinity. It was difficult to properly cool the lamp, and there was a problem that the heat from the lamp was trapped inside the case, causing the inside of the case to become high temperature. There were problems such as the generation of heat and the heat generated by these electronic components.

This invention was made in view of these circumstances, and its purpose is to provide a light source device that can efficiently cool lamps and the electronic components mentioned above to prevent their thermal deterioration and heat generation. We are here to provide you with the following.

That is, the present invention is characterized in that a cooling fan is disposed between an electronic circuit section inside the case and an optical system including a lamp or a lens.

An embodiment of the present invention will be described below with reference to the drawings.

1 in FIG. 1 is an endoscope, and this endoscope 1 has an operating section 2.
A universal cord 4 is connected to the operating section 2, and the connector section 6 of the universal cord 4 is detachably connected to the socket section 7 of the light source device 6. It is possible. Note that 8 is an eyepiece for observation.

As shown in detail in FIG. 2, the light source device 6 includes a lamp housing 11 within a case 10.

Inside this lamp housing 11 is a pair of heat sinks 1.
The xenon lamp 13 is held between 2 and 42.
4 is a parabolic mirror of the xenon lamp 13. Further, as shown in FIG. 3, a large number of radiation fins 15 are formed on one side of the heat sink 12.12, and each of these heat sinks 12.12 has its radiation fins 15. It is located.

An optical system 16 is disposed at the front of the lamp housing 11, facing the xenon lamp f13. This optical system 16 is composed of a condensing lens 12, etc.
This condensing lens 17 causes the light beam Lt of the xenon lamp 13 to be converged onto the incident end surface 19 of the light guide 18 . Note that the light guide 18 is optically connected to the light guide fiber 20 in the universal cord 4 when the connector portion 5 of the universal cord 4 is connected to the socket portion 7. Further, in FIG. 3, reference numeral 21 denotes a notch hole portion through which the light flux passes through the tube.

Further, a turret plate 22 and a reflecting mirror 23 are installed between the rung housing 11 and the condensing lens 11. The turret plate 22 is rotatably supported around a rotating shaft 24, and a plurality of filters 25 are attached to the periphery of the turret plate 22 at intervals in the circumferential direction. These filters 25... are the turret plate 22
By zero rotation, it is selectively positioned on the above-mentioned light beam. Note that 26 is a motor that rotationally drives the turret plate 22, and the drive shaft 2 of the motor 26 is
1 is connected to the rotating shaft 24 via gears 28 and 29.

f. The mirror holder of the reflecting mirror 23, which is rotated by a rotary lens 30 within and outside the optical path of the light beam, is attached to the body 3 by adhesive or the like. This reflecting mirror 28 is optically opposed to a preliminary lamp 32 made of a halodane lamp 9, and projects into the optical path only when the xenon lamp 3 is not lit, so that the light from the preliminary lamp 32 is incident on the above. It is designed to focus on the end face 5-19.

Then, the lamp housing 11 and the condensing lens 1
On the side of the optical system 16 consisting of 7 etc., there is an electronic circuit section 33.3.
4 is placed. These electronic circuit parts 33, 34 are constructed by, for example, cylindrical boards 35... being installed upright at intervals as shown in FIGS. 2 and 3, and these printed boards 35...
...It is constructed by mounting electronic components such as transformers and power transistors on top. Note that the electronic circuit section 33
．． The reference numeral 34 not only constitutes a lighting circuit for the xenon lamp 13 and the preliminary lamp 32, but also constitutes an electronic circuit necessary as the light source device 6 of the endoscope 1.

Cooling fans 3 are provided between the electronic circuit portions 33 and 34, the lamp housing 11, and the optical system 16, respectively.
5.36 is placed.

As shown in FIG. 3, these cooling fans 35, 36 are configured so that an impeller 37 can be rotated by a motor (not shown), and in FIG.
Cooling air is generated that flows parallel to the two heat dissipating fins 156. In addition, 37137 (only one is shown) is a ventilation hole formed in the side wall of the case 10.

The light source device 6 having such a configuration normally focuses the light from the xenon lamp 'JJ onto the incident end surface 19 of the light guide 18 by the condensing lens 17 of the optical system 16. The light is guided from there through the universal cord 4 and the light guide fiber 20 in the endoscope 1 to the tip of the insertion section 3, and is emitted from this tip. Therefore, in the endoscope 1, the inside of the body cavity can be illuminated with the illumination light output from the light source device 6, and the inside of this body cavity can be observed from the eyepiece 8. can be done.

According to the light source device 6 of the above embodiment, the cooling fan 35 is provided between the lamp housing 11 and the electronic circuit section 33.
Since the cooling fan 5sVc is not only able to cool the xenon lamp 13 inside the lamp housing 11, but also allows the electronic circuit section 33 to be cooled simultaneously with the cooling of the xenon lamp 13. In other words, As shown in FIG. 3, the electronic circuit section 33 includes a cooling fan 3
The xenon lamp 13 is cooled by the wind sucked into the xenon lamp 5, and the cooling fan 36 can efficiently cool the xenon lamp 13 and the electronic circuit Wt section 33. Thermal deterioration and amount of heat of the electronic components on the part 33 side can be prevented.

Further, in this embodiment, cooling 77 is also provided between the optical system 16 including the condensing lens 17 and the electronic circuit section 34.
6, the above-mentioned condenser lens 17 is arranged in the same way.
In addition, it also has the advantage of being able to prevent thermal deterioration and amount of heat of electronic components on the electronic circuit section 34 side.

Although the above embodiment has been described as being applied to a light source device used in an endoscope, the present invention is applicable to various light source devices.

As explained above, in the present invention, a cooling fan is arranged between an electronic circuit section inside a case and an optical system including a rung or a lens. Therefore, since the lamp or optical system and the electronic circuit section can be simultaneously cooled by the cooling fan, the temperature inside the case can be prevented from increasing, and the structure can be simplified and the parts on both sides of the cooling fan can be cooled.
It has an excellent effect of preventing thermal deterioration and heat loss.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of the whole, Fig. 2 is a partially cutaway view of the inside of the light source device, and Fig. 3 is a partially cutaway view of the inside of the light source device.
A perspective view of the vicinity of the Zusha cooling fan 9 10...Case, 13...Xenon lamp, 16,
・, Optical system, 17... Condensing lens N J J * J
4.City Electronics Circuit Department 1.35.36...Cooling fans and applicant's agent Takehiko Suzue, S)
-Figure 111

Claims (1)

[Claims] In a light source device in which a lamp is arranged in a case and light from the lamp is emitted through an optical system equipped with a lens, there is provided a light source device between an electronic circuit section in the case and the lamp or the optical system. A light source device characterized in that a cooling fan is arranged in the.