JPH0480365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source device used as a light source for, for example, an endoscope.

When observing the inside of a body cavity using an endoscope, this endoscope is connected to a light source device via its universal cord, and the illumination light output from this light source device is guided into the endoscope. The interior of the body cavity is illuminated by emitting light from the tip 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 configured to be focused and guided to the light guide fiber within the universal cord via an optical system consisting of lenses and the like.

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, conventionally, a cooling fan is disposed near the lamp, and the lamp and its vicinity are cooled by this cooling fan.

However, even when such a cooling fan is used, it is difficult to properly cool the entire inside of the case, and there is a problem in that the heat from the lamp is trapped inside the case, resulting in a high temperature inside the case. This has caused problems such as thermal deterioration of the heat-sensitive electronic components and the above-mentioned optical system within the case, and further heat loss of these electronic components.

This invention was made based on the above circumstances, and its purpose is to provide a light source that can efficiently cool lamps and the electronic components mentioned above to prevent their thermal deterioration and heat loss. The goal is to provide equipment.

That is, the light source device of the present invention is characterized in that an electronic circuit board is arranged almost perpendicularly to the ventilation opening of the case, and a cooling fan is arranged between the electronic circuit board and the lamp or optical system. It is something to do.

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

Reference numeral 1 in FIG. 1 is an endoscope, and the endoscope 1 is composed of an operating section 2 and an insertion section 3. As shown in FIG. Further, a universal cord 4 is connected to the operation section 2, and a connector section 5 of the universal cord 4 can be detachably connected to a socket section 7 of a light source device 6. 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, a xenon lamp 13 is held between a pair of heat sinks 12, 12, and 14 is a xenon lamp 1.
3 parabolic mirror. In addition, the heat sink 1
As shown in FIG. 3, a large number of heat radiation fins 15 are formed on one side of each of the heat sinks 12, 12, and these heat sinks 12, 12 are arranged with the heat radiation fins 15, 15 facing away from each other.

An optical system 16 is disposed in front of the lamp housing 11, facing the xenon lamp 13. The optical system 16 is composed of a condenser lens 17 and the like, and the condenser lens 17 converges the light beam L of the xenon lamp 13 onto the incident end surface 19 of the light guide 18. 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 above-mentioned luminous flux L passes.

Furthermore, the lamp housing 11 and the condensing lens 17
There is a turret plate 22 and a reflecting mirror 2 between the
3 is installed. 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 selectively positioned on the light beam L by rotating the turret plate 22. Note that 26 is a motor for rotationally driving the turret plate 22, and a drive shaft 27 of this motor 26 is connected to the rotating shaft 24 through gears 28 and 29.

The reflecting mirror 23 is attached by adhesive or the like to a mirror receiver 31 which is rotated by a rotary solenoid 30 within and outside the optical path of the light beam L. This reflecting mirror 23 is optically opposed to a preliminary lamp 32 consisting of a halogen lamp, and the xenon lamp 1
Only when lamp 3 is not lit, it projects into the optical path and focuses the light from the preliminary lamp 32 onto the incident end surface 19.

Electronic circuit sections 33 and 34 are arranged on the sides of the optical system 16, which includes the lamp housing 11, condensing lens 17, and the like. These electronic circuit parts 33, 34 each have a plurality of electronic circuit boards 33a,..., 34a... installed in parallel at intervals as shown in FIGS. 2 and 3, and each electronic circuit Substrates 33a,..., 34a...
A ventilation hole 3, which will be described later, is formed in the side wall of the case 10.
The electronic circuit boards 33a, . . . , 34a . . . are arranged perpendicularly to the electronic circuit boards 33a, 34a, . Note that the electronic circuit sections 33 and 34
Not only does it constitute a lighting circuit for the xenon lamp 13 and the spare lamp 32, but it also constitutes an electronic circuit necessary as the light source device 6 of the endoscope 1.

Cooling fans 35 and 36 are arranged between the electronic circuit sections 33 and 34 and the lamp housing 11 and optical system 16, respectively. As shown in FIG. 3, these cooling fans 35 and 36 are configured so that an impeller 37 can be rotated by a motor (not shown), and in FIG. It is designed to generate cooling air that flows in parallel.
Note that 39, 39 (only one is shown) are ventilation holes formed in the side wall of the case 10.

The light source device 6 having such a configuration normally directs light from the xenon lamp 13 to the incident end surface 19 of the light guide 18 using the condensing lens 17 of the optical system 16.
As a result, the light is guided from the light guide 18 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. be. Therefore, in the endoscope 1, 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.

According to the light source device 6 of the above embodiment,
Since the cooling fan 35 is disposed between the lamp housing 11 and the electronic circuit section 33, the cooling fan 35 not only cools the xenon lamp 13 inside the lamp housing 11, but also cools the xenon lamp 13. At the same time, the electronic circuit section 33 can be cooled. That is, as shown in FIG.
The xenon lamp 13 is cooled by the wind sucked in by the cooling fan 35, and the xenon lamp 13 is cooled by the wind blown out from the cooling fan 35. Therefore, by one cooling fan 35, the xenon lamp 1
3 and the electronic circuit section 33 can be efficiently cooled, thermal deterioration and heat loss of not only the components on the xenon lamp 13 side but also the electronic components on the electronic circuit section 33 side can be prevented. Furthermore, since the electronic circuit boards 33a,..., 34a... are arranged almost perpendicularly to the ventilation opening 39, the cooling air flows unhindered from the ventilation opening 39 toward the lamp or the optical system 16. There is no stagnation and a more efficient cooling effect can be obtained.

In addition, in this embodiment, the condenser lens 17
Since a cooling fan 36 is also arranged between the optical system 16 and the electronic circuit section 34, which is equipped with the optical system 16, etc., the cooling fan 36 is arranged between the optical system 16 and the electronic circuit section 34.
It also has the advantage of preventing thermal deterioration and heat loss of electronic components on the fourth 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 disposed between an electronic circuit section inside a case and an optical system including a lamp or a lens. Therefore, since the lamp or optical system and the electronic circuit section can be simultaneously cooled by the cooling fan, it is possible to prevent high temperatures inside the case, simplify the structure, and prevent thermal deterioration of parts on both sides of the cooling fan. It has an excellent effect of preventing heat loss. Furthermore, since the electronic circuit board is arranged almost perpendicularly to the ventilation opening, the cooling air flows unhindered from the ventilation opening towards the lamp or optical system, eliminating stagnation of the air flow and increasing efficiency. A good cooling effect can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is a partially cutaway view of the interior of the light source device, and FIG. 3 is a perspective view of the vicinity of the cooling fan. 10...Case, 13...Xenon lamp, 1
6...Optical system, 17...Condensing lens, 33a, 3
4a...electronic circuit board, 39...ventilation port, 33,
34...Electronic circuit section, 35, 36...Cooling fan.

Claims (1)

[Claims] 1. 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, wherein a ventilation hole is provided in the case, and the ventilation hole is provided in the case. In addition to placing the electronic circuit board almost perpendicular to the mouth,
A light source device characterized in that a cooling fan is disposed between the electronic circuit board and the lamp or the optical system.