JP2000102504A - Light source device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device for an endoscope which can achieve heat radiation by a light source lamp with a simple structure and at a low cost and which can prevent light from escaping to the outside of the device. SOLUTION: A light source lamp 3 set near the center of the box-type main body 4 of this device supplies illuminating light to a light guide connector of an endoscope connected to a light guide connector connecting part 12 in front of the lamp 3. The light source lamp 3 is cooled by a first fan 23 and a second fan 24 on one side of the light source lamp 3 with blowing air to the other side of the light source lamp 3. The blowing air, passing through an air vent 25 formed on a side panel 15a of a lamp holder 15 and an air vent 28 formed on a side panel 27 of a lid board 18, is exhausted from air vents 26 and 29 on the outer shell member facing to the outside of the air vent 28 to the outside of the box-type main body 4. And the air vents 25 and 26, and 28 and 29, which are opposite to each other, are formed so that the light shielding parts are alternate, so the light of the light source lamp 3 will not escape to the outside of the box-type main body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope light source device for supplying illumination light to a light guide of an endoscope.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used in the medical and industrial fields. When inspecting an internal inspection site such as a living body with the endoscope, an endoscope light source that supplies illumination light to a light guide as illumination light transmission means of the endoscope in order to illuminate the inspection site. The device is adopted.

In a light source device for an endoscope, it is necessary to radiate heat generated by a light source lamp (illumination lamp). In a conventional example disclosed in Japanese Patent Application No. 62-74954, one of the light source lamps inside the device is required. By disposing a blower on the side and providing a ventilating opening in the ventilation plate on the other exterior on the ventilation plate, the blower discharges the heat of the light source lamp from the vent to the outside of the device and dissipates heat. Light is prevented from leaking out of the device and becoming dazzling light for the user.

[0004]

By providing the thick ventilation plate with the ventilation holes in the oblique direction as in the above-mentioned conventional example, it is possible to considerably prevent the light of the light source lamp from leaking and dazzling the user. In order to increase the wall thickness and provide ventilation holes in an oblique direction, special processing is required, and there has been a problem that the manufacturing cost is increased. In addition, when the thickness is increased, the weight is increased and the weight is increased, and it is not suitable for the resource saving tendency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a simple structure, can achieve heat radiation by a light source lamp at a low cost, and can prevent light from leaking out of the device. It is intended to provide.

[0006]

According to the present invention, there is provided an endoscope light source device in which a cooling vent is provided on an exterior of the endoscope light source device for supplying illumination light to the endoscope by a light source lamp.
A shielding plate having a ventilation hole between the light source lamp and the device exterior inside the device between the light source lamp and the device exterior so as to prevent light from the light source lamp from being emitted to the outside of the device from the ventilation opening. Is provided, heat radiation by the light source lamp can be achieved with a simple structure and at low cost, and light is prevented from leaking out of the device.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 5 relate to an embodiment of the present invention, FIG. 1 shows an appearance of a light source device for an endoscope of this embodiment, and FIG. 2 shows an endoscope of FIG. FIG. 3 shows a state in which the lamp holder is slid and moved, FIG. 4 shows an AA section and a BB section in FIG.
Shows the shielding configuration in detail.

As shown in FIG. 1, a light source device 1 for an endoscope according to an embodiment of the present invention has a height 2 and a small size in the left-right direction inside a housing 2 as an exterior member, as shown in FIG. The light source lamp 3 and the like are housed in the housing.

The housing 2 has a bottom plate portion, a front plate portion 4a formed by bending both ends of the bottom plate portion, and a back plate portion, and covers the upper surface and both side surfaces of the housing body 4. A ceiling plate 5 having a shape is formed, and an opening 7 for lamp replacement is formed in, for example, a side plate 6 on the left side of the ceiling plate 5, and the opening 7 is fixed with screws. The lamp is replaced by a lamp replacement door 8. These are formed of a metal plate member, for example, and have good heat resistance and light shielding properties.

As shown in FIGS. 1 and 2, a light guide connector connecting portion 12 to which a light guide connector 11 of an endoscope (not shown) is detachably connected is provided near the center of a front plate portion 4a of the housing 2. A power switch 13 and a diaphragm adjustment knob 14 are provided at left and right positions of the connector connection portion 12 on the front plate portion 4a.

A substantially U-shaped lamp house 16 to which a lamp holder 15 to which the light source lamp 3 is attached is slidably mounted to the left in the vicinity of the center in the front-rear direction inside the housing is provided on the bottom plate portion. Installed. An opening is provided near the center of the front surface of the lamp house 16, and when the lamp holder 15 is set at a predetermined mounting position as shown in FIG. The light source lamp 3 is exposed.

An upper surface of the opening of the lamp house 16 is attached with a cover plate 18 with screws, so that the lamp house 1 can be opened.
6 is closed. This cover plate 18 is used for the lamp house 16.
An upper portion of the ceiling plate 5 is formed by closing the opening on the upper surface of the lamp housing 16 and extending from the front surface of the lamp house 16 to the front side.
Has the function of a shielding plate that shields from being heated.

For this reason, when the cover plate 18 is mounted on the upper surface of the lamp house 16, the (extended portion 19) of the cover plate 18 is arranged in contact with the ceiling plate 5 and inside through a gap therebetween without being in contact with the ceiling plate 5. Even if the extension 19 is heated, the heat is not immediately transmitted to the ceiling plate 5.

As will be described later, the extending portion 19 of the cover plate 18 is bent to form a side plate portion 27, and the side plate portion 27 is cooled by blowing air from a blowing means for air cooling. Further, an opening for ventilation is provided in the side plate portion 27 to be used for light shielding (described later). Note that the lamp house 16, the lamp holder 15, and the cover plate 18 are, for example, metal plates, and have good heat resistance and light blocking properties, and good heat transfer characteristics.

Driving power is supplied to the light source lamp 3 via a transformer 21 disposed at the rear of the lamp house 16.
The illuminating light of the light source lamp 3 that has been turned on is reflected and condensed by the reflecting mirror 17 and can be supplied to the end face of the light guide connector 11 mounted on the connector connection portion 12 disposed on the illumination light path in front of the light source lamp 3. I have to.

A stop (not shown) is disposed in the illumination optical path. By turning a stop adjustment knob 14, the base end of the stop is turned to supply illumination to the end face of the light guide connector 11. The light can be adjusted. In the present embodiment, a radiating means or a cooling means by blowing air for preventing heat generation by the light source lamp 3 is provided as described below. The light source lamp 3 is opposed to one (right side) of the lamp house 16 which is open on both sides.
A first fan 23 as a blower for heat radiation (or air cooling) for blowing air to dissipate the heat generated in the first fan 23 is fixed to the bottom plate portion, and a second fan 24 is disposed adjacent to the first fan 23. Is attached.

The first fan 23 is directed from one side opening of the lamp house 16 to the other side opening side, that is, the back side of the reflecting mirror 17 which blows sideways and generates heat from the light source lamp 3. Then, the lamp house 16, the lamp holder 15, the cover plate 18 and the like are cooled.

A side plate portion 15a of the lamp holder 15 faces the other opening side, and the blown air is supplied to the side plate portion 1a.
The air is discharged to the outside of the housing 2 through a ventilation opening (venting opening) 25 formed in 5a and further through a ventilation opening 26 provided in the lamp replacement door 8 facing the outside. This part is shown in FIG.
Is shown in In the present embodiment, as shown in FIG. 2 and the like, the vents 25 and 26 are formed as slit-shaped openings extending in the horizontal direction.

The second fan 24 is connected to the lamp house 1.
6 blows laterally between the front surface and the inner surface of the front plate portion 4a to cool the front surface of the reflector 17 and the front surface of the lamp house 16 and the extension portion 19 of the cover plate 18 which are heated by the radiant heat of the light source lamp 3 and the like. I do. A side plate portion 27 formed by bending the extension portion 19 of the cover plate 18 faces the other side portion facing the second fan 24, and the blown air passes through a vent formed in the side plate portion 27. 28, the side plate portion 6 facing the outside.
The air is discharged to the outside of the housing 2 through the vent hole 29 provided in the housing 2.
This part is shown in FIG.

In addition, a shielding plate (not shown) is provided below the opening on the front surface of the lamp house 16 below the opening where the light source lamp 3 is exposed, in order to prevent the radiation heat of the light source lamp 3 from hitting the bottom plate and being heated. The shield plate is also air-cooled by blowing air from the second fan 24.

A shield (not shown) for preventing the radiant heat of the light source lamp 3 from hitting the front plate portion 4a and heating the front plate portion 4a also in the space between the front surface of the lamp house 16 and the front plate portion 4a. A plate is disposed, and this shielding plate is also air-cooled by blowing air from the second fan 24.

In this case, the shield plate is provided with a switch shield plate portion for shielding the power switch 13 provided on the front plate portion 4a from radiant heat of the light source lamp 3 from being applied.
This switch shielding plate is also air-cooled by the air blow by the second fan 24. In addition, as shown in FIG.
Side plate portion 6 that faces the outside of fans 23 and 24
Also, a slit-shaped ventilation port 30 is provided, and the air flowing through this ventilation port 30 is used for air cooling.

As shown in FIG. 3, a spare lamp 31 is mounted on the bottom surface of the lamp holder 15 in this embodiment in a state of being mounted on the reflecting mirror 32. In other words, the elastic force reflecting mirror 32 of the wire spring 33 is attached to the hook 34 by hooking it. The handle of the wire spring 33 is held, and the wire spring 33 can be easily removed by removing the hook from the hook 34. .

The reflecting mirror 1 is provided on the front of the lamp holder 15.
The light source lamp 3 attached together with 7 is also attached using the elastic force of the wire spring 33,
The wire spring 33 can be easily removed by holding the handle of the wire spring 33 and removing the wire spring 33 from the hook 34.

Accordingly, by removing the lamp replacement door 8, the lamp holder 15 is slid to move the lamp holder 15 out of the opening 7 so that the lamp can be easily replaced.

In the present embodiment, ventilation holes 26 and 29 for discharging air used for cooling are provided on the outer surface of the housing 2, and the light of the light source lamp 3 is controlled by the side plates 15 a and 27 disposed inside the ventilation holes 26 and 29. Is also used as a shielding plate for shielding the outside of the housing 2 from leaking.

In this case, for example, FIG.
As shown in FIGS. 4 (A) and 4 (B), respectively, of the BB section, a vent on the exterior member side of the housing 2 and an inner side plate so that light from the light source lamp 3 does not leak outside the housing 2. The ventilation holes on the side of the section are arranged at alternate positions.

That is, in FIG. 4A, the light of the light source lamp 3 is shielded at portions other than the vent 28 of the side plate portion 27 of the cover plate 18 and the light passing through the vent 28 forms the housing 2. The portion of the side plate 6 of the ceiling plate 5 that faces the ventilation port 29 is shielded from light so that it does not leak outside the housing.

In FIG. 4B, the light of the light source lamp 3 is shielded by a portion other than the ventilation hole 25 of the side plate portion 15a of the lamp holder 15, and the light passing through the ventilation hole 25 is covered by the exterior member of the housing 2. The light is shielded from light at the portion of the lamp replacement door 8 facing the ventilation opening 26 so as not to leak outside the housing.

The lamp replacement door 8 has a U
A leaf spring 37 bent in the shape of a letter is attached, and the leaf spring 37 presses the bottom side of the side plate portion 15a of the lamp holder 15 so that the lamp holder 15 does not come off the predetermined mounting position of the lamp house 16. ing.

FIG. 5 shows, for example, FIG. 4B in more detail. A lamp replacement door, part of which emits light from the light source lamp 3, radially forms an external member of the housing 2 through respective ventilation holes 25 provided at equal intervals in the vertical direction in the side plate portion 15a of the lamp holder 15, for example. 8 side, each vent 2
No vent 26 is provided in the portion where the light that has passed through 5 is provided, and the vent 26 is formed adjacent to the light-shielding portion so as to serve as a light-shielding portion (that is, the side plate portion 15 a Vent 2 in the area where the shaded light hits without being shaded
6 is provided), so that the light of the light source lamp 3 does not leak out of the housing.

In the present embodiment, the light shielding plate provided with the ventilation port which is alternately arranged with the ventilation port is disposed opposite to the inside of the exterior member provided with the ventilation port as described above, so that a simple configuration and low power consumption can be achieved. The light of the light source lamp 3 is reliably prevented from leaking outside at a cost.

Further, as shown in FIG. 4, the (apparatus) exterior member provided with ventilation holes 29 or 26 and the side plate portion 2 as a shielding plate provided with alternate ventilation holes 28 or 25 inside thereof.
By facing the air outlet 7 or 15a via an appropriate gap (interval), the cooled air due to the staggered vents (with respect to the light from the light source lamp 3) does not hinder the air from being exhausted to the outside of the housing. Like that. In this case, if the interval at which the vent is formed is reduced, the interval between the exterior member and the shielding plate can be reduced.

In this embodiment, the light of the light source lamp 3 leaks to one side opposite to the side where the lamp replacement door 8 is provided, but the first fan 23 and the second fan 23 Fan 24 is arranged, and each fan 23 or 2
Almost all light is shielded by the frame portion 4.

An opening is provided in the rotating blade portion of the fan 23 or 24. The adjacent blades substantially overlap each other before and after the rotation axis, and the light emitted from the light source lamp 3 in a radial direction. Almost no light leaks through the opening, and a vent 30 is provided in the side plate 6 facing the outside. However, no light leaks through the vent 30.

For this reason, in the present embodiment, the first fan 23 and the second fan 24 have a function of a light shielding plate for shielding light from the light source lamp 3, so that the first fan 23 and the second fan No shielding plate is arranged on one side where the second fan 24 is arranged.

On the other hand, when the first fan 23 and the second fan 24 have a structure which does not have a function of a light-shielding plate for shielding light from the light source lamp 3, such a structure is adopted. What is necessary is just to provide the above-mentioned shielding plate inside the exterior member. As described above, according to the present embodiment, heat radiation by the light source lamp 3 can be achieved simply and at low cost, and light can be prevented from leaking out of the device. The present invention is also effective when a discharge lamp such as a xenon lamp or a metal halide lamp is used as the light source lamp 3 in addition to the halogen lamp.

Further, inside the light-shielding exterior member provided with the ventilation opening, the portions which are disposed separately from the exterior member and which oppose the opening and the light-shielding portion adjacent to the opening are the light-shielding portion and the opening, respectively. Since the air blown from the air cooling means is blown onto the (shielding portion of) the shielding plate formed so as to be air-cooled, the shielding plate can be surely cooled.

In the present embodiment, one of the two shielding plates is provided on the lid 18 of the lamp house 16,
Since the radiant heat from the light source lamp 3 also serves as a shielding member that prevents the ceiling plate 5 of the exterior member from hitting and heating it, the ceiling plate 5 of the exterior member is effectively prevented from being heated by the air cooling. Yes, Lamphouse 1
6 can be effectively prevented from being heated.

Since the other of the two shielding plates is provided on the lamp holder 15, the lamp holder 15 to which the light source lamp 3 is attached and which is easily heated can be cooled by the above-described air cooling.

[Supplementary Notes] In the endoscope light source device provided with a cooling vent in the exterior of the light source device for supplying illumination light by the light source lamp to the endoscope, light from the light source lamp is emitted from the vent hole. Wherein a shielding plate having a ventilation hole is provided between the light source lamp and the device exterior inside the device between the light source lamp and the device exterior so as not to be emitted outside the device. Light source device for mirror.

2. In Supplementary Note 1, the ventilation port on the exterior of the device and the ventilation port on the shielding plate have a slit shape. 3. In Supplementary Note 1, the ventilation port of the exterior of the apparatus and the ventilation port of the shielding plate are set in a positional relationship in accordance with a radiation direction of light of the light source lamp. 4. In Supplementary Note 1, air is blown onto the shielding plate by a blowing unit that sends cooling air.

5. An endoscope in which a light source lamp is housed inside a housing and supplies illumination light of the light source lamp to a light guide connector of an endoscope detachably connected to a connector connecting portion provided on the front of the housing. In the mirror light source device,
Blowing means that is arranged on one of both sides sandwiching the light source lamp in the housing and sends cooling air to the other side via the light source lamp, and one side of the housing facing the blowing means and A ventilation port provided on each of the other side surfaces, and a shielding plate provided to face the other side surface and provided with ventilation holes so as to alternate with the position of the ventilation hole with respect to the light source lamp are provided. An endoscope light source device characterized by the above-mentioned.

[0044]

As described above, according to the present invention, an endoscope in which a cooling vent in a light source device for an endoscope which supplies illumination light by a light source lamp to an endoscope is provided on the exterior of the device. In the mirror light source device, between the light source lamp and the device exterior inside the device, at an alternate position with the opening of the ventilation opening of the device exterior, so that the light from the light source lamp is not emitted to the outside of the device from the ventilation opening. Since the shielding plate having the ventilation hole is provided, heat radiation by the light source lamp can be achieved with a simple structure and at low cost, and light can be prevented from leaking out of the device.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a light source device for an endoscope according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the endoscope light source device of FIG. 1;

FIG. 3 is a perspective view showing a state where a lamp holder is slid.

FIG. 4 is a sectional view showing an AA section and a BB section of FIG. 1;

FIG. 5 is an explanatory diagram showing a shielding configuration in detail.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 endoscope light source device 2 housing 3 light source lamp 4 housing body 4 a front plate 5 ceiling plate 6 side plate 7 opening 8 lamp replacement door 11 light guide connector 12 ... Light guide connector connector 13 Power switch 14 Aperture adjustment knob 15 Lamp holder 16 Lamp house 17 Reflecting mirror 18 Cover plate 19 Extension 21 Transformer 23 First fan 24 Second Fans 25, 26, 28, 29: Vent (vent) 27: Side plate 31: Spare lamp

Claims (1)

[Claims] 1. An endoscope light source device in which a cooling vent in a light source device for an endoscope that supplies illumination light from a light source lamp to an endoscope is provided on an exterior of the device. In order to prevent the light from the lamp from being emitted to the outside of the device, a shielding plate having a ventilation hole is provided between the light source lamp and the device exterior inside the device and at an alternate position with the opening of the ventilation hole of the device exterior. Characteristic light source device for endoscope.