JPS6323120A - Endoscope - Google Patents

Abstract

PURPOSE:To separate the display device of an endoscope from its light source device so that the display device can be set at any position at which the operator of the endoscope can easily watch the display device, by separating a signal line from a light guide fiber inside a connector installed to a universal cord and connecting the signal line to the display device. CONSTITUTION:A connector 11 is installed to the end of a universal cord 6 housing a light guide fiber 10 and signal line 16 and the fiber 10 and line 16 are separated from each other inside the connector 11. When the light guide fiber 10 is connected with a light source device 12 through the connector 11 and signal line 16 is connected with a display device 18, the display device 18 can be set independently at a separate place from the light source device 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention allows the viewing range such as the angle of view and viewing direction of the observation optical system provided on the tip component side to be changed by an optical adapter that is detachably attached. Regarding the improvement of endoscopes.

[Conventional technology]

Generally, in body cavity calibration using an endoscope.

Endoscopes with different viewing ranges are used depending on what part of the body cavity is to be observed.

In other words, endoscopes with different angles of view are used depending on whether a large area or a narrow area is to be observed precisely, and whether the area to be observed is passed through a direct-viewing endoscope or a side-viewing endoscope is used. Endoscopes with different viewing directions are used depending on whether the observation site is suitable or not, and endoscopes with different viewing ranges are used to accommodate various observation conditions.

However, since endoscopy is very S1-valent.

It is extremely uneconomical to prepare many endoscopes with different viewing ranges such as viewing angles and viewing directions.

Therefore, an optical adapter is detachably attached to the tip component of the endoscope, and the angle of view and viewing direction can be changed OT, making it unnecessary to prepare many endoscopes. was developed, but with the conventional configuration, when an optical adapter was attached, the top and bottom of the image that could be seen at the eyepiece of the endoscope were sometimes reversed, so it was difficult to use it. There was a problem in that it was easy for users to make incorrect operations. In this case, for example, it is conceivable to arrange a prism or the like in the optical adapter to make the observed image correct, but this has the disadvantage of increasing the size of the entire insertion section of the endoscope.

In addition, the distal end component of the endoscope is made detachable from the flexible tube, and an observation optical system and a solid-state image sensor are incorporated into this distal end component, so that the image formed by the observation optical system is transferred to the solid state. The image sensor converts it into an electrical signal, electrically connects the contact on the tip component side and the contact on the flexible tube section, and uses the LFI image formed by the viewing optical system as an electrical signal for use in a display device, etc. Some were configured to transmit data to

However, in this case, when the tip component is removed from the flexible tube section, each electrical contact is exposed to the outside, so there is a risk of electric shock to the user, which is dangerous.

On the other hand, a universal cord connected to the endoscope body has a light guide fiber and a signal line inside, and a connector is provided on this universal cord. In addition to connecting this connector to a light source device, the light guide fiber is connected to the light source of the light source device, and the signal line is connected to a display device provided in the light source device.

Then, 1ifll* imaged by the observation optical system is converted into an electrical signal by the solid-state image sensor and input to the display device.

[Problem that the invention seeks to solve]

By the way, conventionally, when a connector provided at the tip of a universal cord is connected to a light source device, it is optically connected by a light guide fiber, and a signal line is electrically connected by a terminal pin or the like. therefore.

When the light source device and the optical display device are integrated and the former operates the endoscope while observing the lfI image on the display device,
It is necessary to set the light source device close to the surgeon.

This issue 9J was made focusing on the above ◆ situation.

The purpose is to provide an endoscope in which only a display device can be installed in a position where the operator can easily see the display device in addition to the light source device.

[Means and effects for solving the problem] In the present invention, a connector 11 is provided at the tip of the universal cord 6 in which a light guide fiber and a signal line are installed, and the light guide fiber and the signal line are connected inside the connector 11. This is due to the separation of the

Then, the light guide fiber is connected to the light source device 12 with the connector fully valved, and the signal line is connected to the display device 1ii.
18, the display device 18 can be connected to the light source device 1.
The reason is that it can be installed separately from 2.

〔Example〕

The present invention will be described below based on an embodiment shown in the drawings. In FIGS. 1 to 3, 1 is an endoscope main body. This endoscope main body 1 includes an operating section 2, a flexible tube section 3. The operating section 2 is formed from a curved section 4 and a tip structure section 5.
A universal cord 6 is connected to the . Further, the operating portion 2 is provided with an operating knob 2, and when the operating knob 7 is rotated, the bending portion 4 can be bent using the K. As shown in FIG. 2, the tip component 5 is formed with a narrow diameter portion 8, and therein is an observation optical system 9 consisting of a plurality of lenses and a light guide fiber as an illumination optical system consisting of an optical fiber bundle. 10 is installed. The light guide fiber 10 is connected to a connector 11 via the flexible tube section 3 and the operating section 2, and further through the universal cord 6. When the connector 11 is connected to the light source device 12, the light source device 12 is guided by the light guide fiber part 0, and the light from the light guide fiber 10 is guided to the radiation end face 1 at the tip of the light guide fiber 10.
3, it is radiated to the outside. Further, the viewing optical system 9 has a wide field of view, that is, an angle of view, which is set to α° as shown in FIG. A sheet glass 14 is attached to the front of the observation optical system 90, and a solid-state image sensor 15 is disposed at the rear. And observation optical system 9
An electrical signal corresponding to the imaged pixel (image) of the light-receiving surface K irE of the solid-state image sensor 15 is outputted by the solid-state image sensor 15, and a lead wire 16 as a signal line is outputted by the solid-state image sensor 15.
The flexible tube section 3. Operation unit 2. universal code 6
The signal is sent to the connector 11 via the . Further, the light guide fiber 10 and the lead wire 16 housed in this connector 11 are separated inside the connector I. The light guide fiber 10 is connected to a socket of a light source device 12, and the lead wire 16 is connected to a display device 18 via a cord cable 17 led out from the side of the connector 11.

This display device 18 restores the electric signal to an image and displays it on the cathode ray tube surface of the display device 18. When the image formed on the light-receiving surface of the solid-state sensor 9R element 15 is inverted based on the electric signal sent from the solid-state image sensor 15, the display device 18 displays this inverted image. It is also possible to switch it so that it stands upright.

On the other hand, a protrusion 1 is provided on the outer circumferential surface of the narrow diameter portion 8 of the tip component 5.
A locking body 20 having a locking body 9 and a band-shaped backing 2 are provided on the distal end side of the locking body 20. and,
An optical adapter 22 is detachably attached to the narrow diameter portion 8. This optical adapter 22 has a #424 formed on the inner circumferential surface of the adapter main body 23, which fits into the protrusion 19, and a recess 25 which presses against the backing 2, and the narrow diameter part 8 of the tip component 5. is attached watertight to the Further, inside this optical adapter 22, a field of view changing optical system 26 and an illumination range changing optical system 27 are provided along the axial direction of the adapter body 23, and these optical systems 26 and 27 are provided.
．． 27 are optically connected to the observation optical system 9 and the light guide 10 built into the tip component 5, respectively. The field of view changing optical system 26 includes a plurality of lenses 28 whose focal length is sufficiently larger than that of the observation optical system 9.
・・・Karana 9. The viewing angle αO of the observation optical system 9 has also been expanded to a large angle r. Further, the illumination range changing optical system 27 is composed of an optical fiber bundle 29.

Therefore, with some of the configurations described above, simply by attaching the optical adapter 22 to the tip component 5 of the endoscope body 1, the angle of view of the tip component 5 can be changed from the angle of view α0 of the observation optical system 9. The field of view changing optical system 26 has a larger angle of view β0 than α0.
can be changed to Moreover, since the adagetor body 23 of the optical adapter 22 is tightly attached to the distal end component 5 of the endoscope body 1, bodily fluids and the like will not infiltrate into the adapter body 22. Furthermore, in this case, the user can always twist the original text image.

It is easy to use and reduces the risk of erroneous operation. Further, since there is no need to incorporate an erecting grism into the optical agegator as in the conventional case, there is no fear that the entire insertion section will become larger. Furthermore, the face M4 image is sent to the display device 18 by the electric No. 4J VC output from the LLID body imaging probe 15.

The outer diameter of the insertion section can also be made smaller than in the case where the observation image is sent through an optical fiber bundle. -Also, one shot? ! Since the element 15 is provided on the side of the tip component 5, even if the optical agegator 22 is removed from the tip component 5, the electrical contacts will not be exposed to the outside. Therefore, there is no risk of electric shock to the user, and it is safe.

〔Effect of the invention〕

As explained above, according to the present invention, the light guide fiber and the signal line are separated inside the nine connectors installed in the universal cord, and the signal line can be connected to the display device, so that only one light source device can be used. The display device f can be set separately for each. Therefore, the effect is that the display device can be installed at a position where the operator can easily see it.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of this invention.
Figure 1 is a perspective view showing the state of use, Figure 2 is a longitudinal sectional view showing the tip component, and Figure 3 is an optical adapter t attached to the tip component.
- It is a vertical cross-sectional view showing a state in which it is installed. 1... Endoscopic fi body, 6... Universal cord. 10...Light guide fiber, 11...Connector. 16...Lead wire (signal line), 12...Light source device. 18...Display device. Applicant's representative Patent attorney Jun Tsuboi Figure 1

Claims (1)

[Claims] In an endoscope in which a light guide fiber and a signal line are installed in a universal cord connected to the endoscope body, and a connector for connecting the light guide fiber to a light source device is provided in the universal cord,
An endoscope characterized in that a light guide fiber and a signal line are separated inside the connector, the light guide fiber is connected to a light source device via the connector, and the signal line is connected to a display device.