JPH056164B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source device for an endoscope that has versatility and can be applied to many types of endoscopes.

The endoscope is connected to a light source device via a light guide cable, and illuminates the inside of the body cavity by guiding light output from the light source device.
In other words, the light source device includes a light source in the main body of the device,
The light source includes a condenser lens, an optical filter, and the like that converges the light beam from the light source onto the incident end surface of the light guide.

By the way, the above-mentioned optical filter is used to correct colors and improve color balance when observing the inside of a body cavity, for example. Therefore, when using a different model of endoscope, it is necessary to improve the color balance when observing the inside of a body cavity. An optical filter suitable for the inside of the body cavity in which the treatment is performed is required. For this reason, in the past, various optical filters were attached to the turret plate according to each endoscope, and when the endoscope was connected to a light source device, a discriminating circuit was used to detect this endoscope at the same time as the connection. There is a system in which a predetermined optical filter can be automatically set by determining the type of mirror and rotating the turret plate by a drive circuit based on a signal from the determining circuit.

However, in such devices, optical filters are uniformly set by the endoscope, so even if you want to observe through an optical filter other than this automatically set optical filter, you can select an optical filter. The endoscope was not usable, and there was a problem that it restricted the way the endoscope could be used.

This invention was made based on the above circumstances, and its purpose is to provide a light source device for an endoscope that can automatically and selectively switch optical filters for use. .

That is, this invention automatically sets a predetermined optical filter according to the model of the connected endoscope, and sets an optical filter other than the optical filter specified by the model of the endoscope. It is characterized by the provision of a selection changeover switch that can be selectively set.

An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, 1 is an endoscope, and 2 is a light source device.
The endoscope 1 consists of an operating section 3 and an insertion section 4, into which an image guide 5 and a light guide 6 are inserted, as shown in FIG. The distal end of the image guide 5 is optically connected to the objective lens 7 at the distal end of the insertion section 4, and the base end thereof is optically connected to the eyepiece lens 9 provided in the eyepiece section 8 of the operation section 3. Further, the tip of the light guide 6 similarly faces the illumination window 10, and the base end thereof is inserted through a light guide cable 11 connected to the operation section 3. The tip end of the light guide cable 11 can be detachably connected to the socket 13 of the light source device 2 via the connector 12, and when connected, the incident end surface 14 of the light guide 6 is positioned at a predetermined position. It is becoming more and more common.

On the other hand, a first light source 16 is provided within the main body 15 of the light source device 2, as shown in FIG. This first light source 16 is constructed by incorporating a xenon lamp 18 into a parabolic mirror 17. A condensing lens 19 is provided in front of the first light source 16 and facing the first light source 16.
The light beam L from the light guide 6 is converged onto the incident end surface 14 of the light guide 6 by the condenser lens 19 .

Then, the first light source 16 and the light guide 6
A turret plate 20 and a reflecting mirror 21 are installed in the middle of the optical path connecting the incident end face 14 of the light beam. The turret plate 20 has a disk shape as shown in FIG. 3, and a rotating shaft 22 is provided at the center thereof. This rotating shaft 22 is rotatably supported by bearings 23, 23 provided on both sides of the turret plate 20, and one end thereof is connected to a drive shaft 26 of a step motor 25 via a coupling 24. The turret plate 20 can be rotated. Optical filters 27 are mounted on the periphery of the turret plate 20 at equal intervals in the circumferential direction. Various types of optical filters 27 are provided depending on the type of endoscope 1 to be connected, for example, a gastric or duodenal endoscope. A predetermined optical filter 27 depending on the model of the endoscope 1 is positioned on the optical path. That is, the apparatus main body 15 is provided with a discrimination circuit 28. This discrimination circuit 28 is, for example, connected to the connector 12 of the endoscope 1.
By providing an identification pin (not shown) according to the model in the connector 12, the connector 12 can be connected to the socket 1
At the same time as the endoscope 1 is connected to the endoscope 1, a model signal obtained from the discrimination pin is inputted, thereby making it possible to discriminate the model of the endoscope 1. The discrimination circuit 28 then sends a discrimination signal according to the model to the control circuit 28.
The control circuit 29 and the drive circuit 30 rotate the step motor 25 and rotate the turret plate 2.
The optical filter 27 corresponding to the model of the endoscope 1 is positioned on the optical path by controlling the rotation angle of zero.

Further, the reflecting mirror 21 is attached by adhesive or the like to a mirror receiver 32 which is rotated within and outside the optical path by a rotary solenoid 31, and a second light source 3 consisting of a halogen lamp is attached.
3 and can be optically opposed to each other. That is, the luminous flux of the second light source 33 is reflected by the reflecting mirror 21 that projects into the optical path only when the first light source 16 is not lit, and is focused on the incident end surface 14.

Among the optical filters 27 of the turret plate 20, at least one optical filter 27a is detachably mounted. That is, a notch 34 is formed at the peripheral edge of the turret plate 20, and the optical filter 27a is removably attached to this notch 34 via a filter frame 35 thereof. The optical filter 27a is not automatically set depending on the model of the endoscope 1, but can be set independently for the model.
That is, the device main body 15 is provided with a setting switch 36 (selection switch) for specifying the optical filter 27a, and when the setting switch 36 is turned on, the turning signal is input to the control circuit 29. Ru. And this control circuit 2
9 is configured to output a control signal to the drive circuit 30 when the input signal is obtained, regardless of the discrimination signal from the discrimination circuit 28, and rotate the turret plate 20 based on this control signal. This allows the optical filter 27a to be positioned on the optical path.

Further, in addition to the setting switch 36, the apparatus main body 15 is provided with selection buttons 37 (selection changeover switch). These selection buttons 37..., like the setting switch 36 above, can select the optical filter 27... regardless of the model of the endoscope 1, and when these selection buttons 37... are turned on, the discrimination circuit 28 selects the optical filter 27... Optical filters 27 other than the automatically set optical filter 27 and the optical filter 27a designated by the setting switch 36 can be set via the control circuit 29.

Therefore, according to the light source device 2 having the above configuration,
It is not limited to the optical filter 27 that is automatically set, and any optical filter 27 on the turret plate 20 can be used by turning on the setting switch 36 and selection switch 37 as necessary. It is possible to easily diversify usage patterns. Further, the optical filter 27...
At least one optical filter 27a is replaceably attached to the turret plate 20, so if the optical filter 27a is a filter for special photography such as ultraviolet, infrared, or fluorescent photography, When photographing the inside of a body cavity, the optical filter can be easily replaced using the setting switch 36. Furthermore, the present invention is excellent in versatility, since it is not limited to the special imaging filter described above, and examiners such as doctors can use their own special filters.

Note that in the above embodiment, the optical filter 2
Although one of the optical filters 27a among the optical filters 27a is replaceable, the specific structure can be modified in various ways, such as having two or more replaceable optical filters.

As explained above, the present invention provides a light source device in which a predetermined optical filter is automatically set from among various optical filters according to the model of an endoscope.
A selection switch is provided to selectively set the optical filter regardless of the model of the endoscope.
Furthermore, at least one of the various optical filters described above is replaceably mounted on the turret plate. Therefore, the device can be used in a variety of ways, such as easily observing the inside of a body cavity through not only the automatically set optical filter but also other optical filters, resulting in excellent versatility.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the entire system, FIG. 2 is a schematic diagram of the overall configuration, and FIG. 3 is a perspective view of a turret plate. 1...Endoscope, 6...Light guide, 15...
Apparatus body, 16...first light source, 20...turret plate, 27, 27a...optical filter, 28...
...Discrimination circuit, 29...Control circuit, 30...Drive circuit, 36...Setting switch (selection changeover switch), 37...Selection button (selection changeover switch).

Claims (1)

[Scope of Claims] 1. A light source is disposed within a device main body, and a light guide of an endoscope is configured to be connectable within the device main body, and a light guide is provided in the middle of an optical path connecting the light source and the incident end surface of the light guide. A rotatable turret plate is provided, and a plurality of various optical filters are attached to the periphery of the turret plate at intervals in the circumferential direction, and when an endoscope is connected to the device body, the endoscope's A discrimination circuit for discriminating the model is provided, and the turret plate is rotated based on a signal from the discrimination circuit to automatically select a predetermined optical filter according to the endoscope from among the various optical filters on the optical path. In an endoscope light source device equipped with a drive circuit located at
A control circuit is provided to control the drive circuit to position the optical filter designated by the selection switch on the optical path regardless of the determination by the determination circuit, and at least one of the various optical filters is positioned relative to the turret plate. A light source device for an endoscope, characterized in that it is installed in a replaceable manner.