JP2004344218A - Light source connecting adaptor of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the light source connecting adaptor of an endoscope capable of obtaining an endoscopic observation image having good brightness always suitable for observation by properly controlling the quantity of illumination light entering the light guide of the endoscope even if a non-genuine endoscope not corresponding to a light source device is used. <P>SOLUTION: The light source connecting adaptor of the endoscope is constituted by integrally providing a connector connection part 42 to which the light guide connector 25 of the non-genuine endoscope 20 is connected, a light guide member 43 for guiding the light, which is emitted from a light source lamp 11, to the light guide connector 25 of the non-genuine endoscope 20 connected to the connector connection part 42, an iris driving member 45 for driving an iris member 44 and an iris control circuit 46 for controlling the operation of the iris driving member 45 on the basis of the input signal from the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light source connection adapter for an endoscope for connecting and using a light guide connector of a non-genuine endoscope that is not compatible with a light source device to the light source device.
[0002]
[Prior art]
The endoscope is provided with a light guide connector that is connected to a light source device, which is a source of illumination light, to supply illumination light to the illumination light guide. The light guide connector is inserted and connected to the provided connector receiver.
[0003]
However, when the manufacturer differs between the light source device and the endoscope (hereinafter referred to as “when a non-genuine endoscope that does not correspond to the light source device is used”), the light guide connector of the endoscope is used. And the connector receiver of the light source device do not match, so that even if the light guide connector can be inserted into the connector receiver, sufficient illumination light does not enter the light guide.
[0004]
Therefore, conventionally, a light source connection adapter is inserted and connected to a connector receiver of the light source device, and a light guide connector of a non-genuine endoscope is inserted and connected to the light source connection adapter, so that the light source lamp built in the light source device can be removed. The emitted illumination light can be made sufficiently incident on a light guide of a non-genuine endoscope (for example, Patent Document 1).
[0005]
[Patent Document 1]
JP-B-7-43461 [0006]
[Problems to be solved by the invention]
Generally, an illumination window that emits illumination light from the endoscope toward the subject is provided alongside the observation window at the distal end of the insertion portion of the endoscope. The brightness of the subject changes according to the distance (in inverse proportion to the square of the distance).
[0007]
Therefore, in order to maintain the brightness of the subject suitable for observation, it is necessary to constantly control the amount of illumination light supplied from the light source device to the light guide of the endoscope. Built in.
[0008]
However, when a non-genuine endoscope that does not correspond to the light source device is used as described above, the illumination light can be incident on the light guide by using the light source connection adapter, but the non-genuine endoscope is used. The light control device in the light source device cannot be operated by the output signal from the light source device.
[0009]
Therefore, it is not possible to control the amount of illumination light incident on the light guide of the endoscope, so that a good endoscope observation image can be obtained when the brightness of the subject greatly varies depending on the observation distance. Did not.
[0010]
Accordingly, the present invention provides a method of appropriately controlling the amount of illumination light incident on a light guide of an endoscope, and thus always suitable for observation even when a non-genuine endoscope not corresponding to the light source device is used. It is an object of the present invention to provide an endoscope light source connection adapter capable of obtaining an endoscope observation image with a high brightness.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a light source connection adapter for an endoscope according to the present invention includes a genuine endoscope in a connector receiver of a light source device for connecting a light guide connector of a genuine endoscope corresponding to the light source device. Endoscope that is connected in place of the light guide connector and guides the illumination light emitted from the light source lamp built in the light source device to the light guide connector of a non-genuine endoscope that is not compatible with the light source device. A light source connection adapter for a mirror, wherein the light guide connector of the non-genuine endoscope is connected to the light guide connector of the non-genuine endoscope, and the light guide connector of the non-genuine endoscope connected to the connector connection part from the light source lamp. A light guide member for guiding the emitted illumination light, a diaphragm member for controlling the amount of illumination light incident on the light guide connector of the non-genuine endoscope, and a diaphragm for driving the diaphragm member A drive member and a diaphragm control circuit for controlling on the basis of the input signal of the operation of the diaphragm driving member from the outside, in which integrally formed.
[0012]
The luminance signal in the video signal of the endoscope observation image obtained by the non-genuine endoscope is input to the aperture control circuit, and the operation of the aperture member is controlled in accordance with the luminance signal value. You may.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 10 denotes a light source device having a built-in light source lamp 11. When a light guide connector (not shown) of a genuine endoscope corresponding to the light source device 10 is connected to the connector receiver 12, the light source lamp 11 is turned on. The illumination light radiated from the endoscope is efficiently and efficiently incident on the illumination light guide of the endoscope.
[0014]
Reference numeral 20 denotes a non-genuine endoscope that does not correspond to the light source device 10, and captures an endoscope observation image inside an observation window (not shown) arranged at the distal end 21a of the insertion section 21. Solid-state image sensor (not shown) is disposed.
[0015]
Then, a signal cable 22 for transmitting an imaging signal or the like of an endoscope observation image captured by the solid-state imaging device passes through the inside of the insertion portion 21 to reach the signal connector 23, and corresponds to the endoscope 20 ( Therefore, when the signal connector 23 is inserted into the socket 31 of the video processor 30 (which is non-genuine with respect to the light source device 10), the imaging signal is input to the video process circuit 32 in the video processor 30 and processed, and the video signal is processed. Is output.
[0016]
An emission end of a light guide fiber 24 for transmitting illumination light for illuminating the observation range is arranged inside an illumination window (not shown) arranged at the distal end 21a of the insertion portion 21 alongside the observation window. The light guide fiber 24 passes through the inside of the insertion portion 21 to reach the light guide connector 25, and the incident end face of the light guide fiber 24 is disposed at the tip end face of the light guide connector 25.
[0017]
Reference numeral 40 denotes a light source for efficiently causing illumination light emitted from the light source lamp 11 incorporated in the light source device 10 to enter the light guide fiber 24 of the non-genuine endoscope 20 that does not correspond to the light source device 10. It is a light source connection adapter.
[0018]
As shown in FIG. 1, the light source connection adapter 40 includes a rod-shaped light source connection portion 41 inserted and connected to the connector receiver 12 of the light source device 10, and a light guide connector 25 of the non-genuine endoscope 20. And the connector connecting portion 42 to be inserted and connected are formed straight on a straight line.
[0019]
In the light source connecting portion 41, a light guide member 43 formed of, for example, a rod-shaped light guide or the like for transmitting the illumination light emitted from the light source lamp 11 to the light guide fiber 24 is inserted and arranged at an axial position. When the connection portion 41 is inserted and connected to the connector receiver 12, the illumination light emitted from the light source lamp 11 efficiently enters the light guide member 43 without waste and is transmitted to the other end side (the emission end face) of the light guide member 43. Is done.
[0020]
When the light guide connector 25 is inserted and connected to the connector connection portion 42, the incident end face of the light guide fiber 24 is set at a position facing the emission end face of the light guide member 43, as shown in FIG.
[0021]
In a narrow gap between the incident end face of the light guide fiber 24 and the exit end face of the light guide member 43, a diaphragm member 44 for controlling the amount of illumination light incident on the light guide connector 25 from the light guide member 43 is provided. Are located. Reference numeral 45 denotes an actuator built in the light source connection adapter 40 for driving the diaphragm member 44 to rotate.
[0022]
As shown in FIG. 3, for example, the aperture member 44 has a slit 44a formed at a position where the illumination light passes, the width of which gradually changes along the locus of an arc centered on a drive shaft 44b rotationally driven by an actuator 45. The amount of illumination light incident on the light guide connector 25 from the light guide member 43 changes according to the amount of rotation of the stop member 44.
[0023]
Returning to FIG. 1, an aperture control circuit 46 for controlling the operation of such an actuator 45 is also built in the light source connection adapter 40. The aperture control circuit 46 of this embodiment is provided with a luminance signal from the outside. Is input, the operation of the actuator 45 is controlled so as to make the luminance signal value constant. Note that the circuit configuration of such a control circuit is general and publicly known, so that the illustration is omitted.
[0024]
As shown in FIG. 2, the luminance signal in the video signal of the endoscopic observation image output from the video processing circuit 32 of the video processor 30 is supplied to the light source by a connection cord 50 connected to the output terminal 33. The data is input to the aperture control circuit 46 of the connection adapter 40.
[0025]
With such a configuration, even when the non-genuine endoscope 20 that is not compatible with the light source device 10 is used, the stop member 44, the actuator 45, the stop control circuit 46, and the like are connected to the light source connection unit 41 and the connector connection unit. By using the light source connection adapter 40 integrally disposed with the light source 42, the amount of illumination light incident on the light guide fiber 24 of the endoscope 20 is appropriately controlled, so that a good brightness suitable for observation is always obtained. An endoscope observation image can be obtained.
[0026]
The present invention is not limited to the above-described embodiment. For example, the illumination light amount control performed in the light source connection adapter 40 can adopt various modes such as enabling more complicated control.
[0027]
【The invention's effect】
By using the light source connection adapter of the present invention, even if a non-genuine endoscope that does not correspond to the light source device is used and the light control device in the light source device cannot be operated, the light of the endoscope can be used. By appropriately controlling the amount of illumination light incident on the guide, it is possible to always obtain an endoscope observation image with good brightness suitable for observation even when the observation distance changes.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a light source connection adapter of an endoscope according to an embodiment of the present invention.
FIG. 2 is a side view showing a partial cross section of the entire configuration of the system according to the embodiment of the present invention.
FIG. 3 is a front view of a diaphragm member according to the embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 10 light source device 11 light source lamp 12 connector receiver 20 non-genuine endoscope 24 light guide fiber 25 light guide connector 30 video processor 32 video process circuit 40 light source connection adapter 41 light source connection portion 42 connector connection portion 43 light guide member 44 aperture member 45 Actuator (aperture drive member)
46 Aperture control circuit 50 Connection code

Claims (2)

A light guide connector of the genuine endoscope corresponding to the light source device is connected in place of the light guide connector of the genuine endoscope to a connector receiver of the light source device for connection, and is incorporated in the light source device. A light source connection adapter for an endoscope for guiding illumination light emitted from a light source lamp to a light guide connector of a non-genuine endoscope that does not correspond to the light source device,
A connector connection portion to which the light guide connector of the non-genuine endoscope is connected, and illumination light emitted from the light source lamp to the light guide connector of the non-genuine endoscope connected to the connector connection portion. A light guide member for guiding, an aperture member for controlling the amount of illumination light incident on the light guide connector of the non-genuine endoscope, an aperture drive member for driving the aperture member, and the aperture drive member A light source connection adapter for an endoscope, wherein a stop control circuit for controlling the operation of the diaphragm based on an external input signal is provided integrally. A luminance signal in the video signal of the endoscope observation image obtained by the non-genuine endoscope is input to the aperture control circuit, and the operation of the aperture member is controlled in accordance with the luminance signal value. A light source connection adapter for an endoscope according to claim 1.

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