JPS58163331A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope in which a television camera device can be installed in the eyepiece.

When observing the inside of a patient's body cavity using an endoscope, a television camera device is often connected to the 88 section of the endoscope via a connecting device, and the image of the patient is displayed on a television monitor. Friend, at the same time as this endoscopic observation, it may be necessary to use other medical equipment on the above patient, such as an electrocardiograph, with its contacts touching the patient's body surface. .

Like Jin, when using an endoscope and an electrocardiograph at the same time, there are cases where the electrocardiograph is forgotten to be grounded or unplugged carelessly, and also due to electrocardiograph malfunctions or accidents. If a large current is generated, this current can flow from the contact to the patient, and then down through the endoscope and connection device to the television camera system. In other words, since current will be passed through the patient's body, an extremely serious problem will arise in which the patient's life will be in a very dangerous situation in such a case.

Jin's invention was made based on the above circumstances, and its purpose is to electrically insulate the operating section of an endoscope and the section *a provided in this operating section with an insulator. B. Provides an endoscope that prevents current from passing through the patient's body.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 in FIG. 1 is an endoscope. This endoscope 1 consists of an insertion section 2 and an operation section 3, and the operation section 3 includes an eyepiece section 4.
and universal code 5 are provided. The insertion section 2 is inserted into the body cavity 7 of the patient 6. A television camera device 9 is connected to the eyepiece section 4 via a connecting device 8, and a connector 5a provided at the end of the universal cord 5 is connected to a light source device 11 via an insulating end plate 10. ing. The insulating end plate 10 electrically insulates the connector 5a and the light source device 11. Note that the light source device 1 is connected to a power source 12 and connected to a first ground 9.
1s) is grounded.

A control device 15 is connected to the television camera device 9 by a first cable 14, and a second
A television monitor 17 is connected by a cable 16 . Therefore, the electric signal from the television camera device 9 is amplified by the control device 15 and then becomes a video signal.
Further, a composite Eirin signal obtained by adding a synchronization signal to this video signal is sent to the television monitor 17, so that the Eirin appears on the television monitor 11.

Hiko, the control device 15 is connected to a power source 18 and is grounded by a second grounding wire 19. At the same time as observing the inside of the body cavity i using the endoscope 1,
An electrocardiograph zoom probe 21 is brought into contact with the body surface of the patient 6 to measure the electrocardiogram. The electrocardiograph 20 has a power supply 22
The l111 section 4 is constructed as shown in FIG. 2. That is, numeral 24 in the figure is a companion attachment with a collar 25 provided at one end. The collar 25 of the mounting tube 24 has an annular connecting plate 2 made of an insulator such as synthetic resin or ceramic material.
7 is joined and fixed on one side. The other side of the connecting plate 27 is fixed to the wall 28 of the operating section 3. Therefore, the operating section 3 and the mounting tube 24 are electrically insulated by the connecting plate 27. A pace 29 is fitted and fixed in the mounting tube 24.

A mounting hole 30 is bored in the center of this pace 29, into which the end of an image kite 31 guided from the operating section 3 is inserted and fixed. A lens frame 33 holding an eyepiece lens 33a is slidably fitted into this cylindrical portion 32. The lens frame 33 has a number of pins 34 which are inserted into nine elongated holes along the axial direction of the cylindrical portion 32.
The eyepiece lens 33a is always urged in the direction of the image guide 31 by a spring 36 which is sandwiched between these pins 34 and 35 and the tip of the cylindrical portion 32. A photographing cam 31, a diopter adjustment cam 38, and a diopter adjustment ring 39 are sequentially and rotatably provided on the outside of the cylindrical portion 32. The photographing cam 37 and the diopter adjustment cam 38 each have a cam hole, and the diopter adjustment cam 38 further has an engagement groove 40, and the pin 35 is inserted into each cam hole and engaged. The groove 40 has a diopter adjustment lens 3.
Interlocking pin 4 protruding from 9 is engaged. Therefore, by rotating the diopter adjustment ring 39 by operating its protruding portion from the mounting tube 24, the diopter adjustment cam 3
8 is rotated in conjunction with the diopter adjustment cam 38.
A pin 35 engages with the cam surface (the edge of the cam hole), thereby moving the eyepiece lens 33a in the direction of its optical axis to adjust the diopter.

Further, a bayonet 42 is attached to the tip of the cylindrical portion 32. This bayonet 42 has an arcuate hole 43, through which a projection 44 integrally projecting from the photographing cam 37 passes. This protrusion 44 is inserted into and engaged with the hole 46 of the nine claws 45 provided on the connecting device 8 when the connecting device 8 is attached to the eyepiece portion 4 .

That is, the connecting device 8 includes a cylindrical main body 41 and a positioning tube 48 that is fitted and fixed in the main body 41. The positioning tube 48 has a stepped portion 49 having a shape corresponding to the bayonet 42. The mold 45 is provided on this stepped portion 49. Then, by rotating the connecting device 8 by a predetermined angle with the protrusion 44 inserted into and engaged with the hole 46 of the claw 45, the cam surface and the pin 35 are engaged with each other as the photographing cam 37 rotates. The lens frame 33 holding the eyepiece lens 33a is moved toward the television camera device 9, which is connected to the connecting device 8, and enters a photographing state. That is, the focal position of the eyepiece lens 33a is located within the case 48 of the television camera device 9 connected to the connecting device 8, and on the imaging surface 50 of the nine camera tube 49.

Also, at this time, by rotating the connecting device 8 by a predetermined angle, the leaf spring 51 provided on the mold 45 is compressed.
The spring force fixes the connecting device 8 to the eyepiece portion 4 without wobbling.

Note that the diopter adjustment ring 39 has an 0 ring 1 on the outer periphery.
52 are attached, and these are in loose contact with the mounting tube 53.

Using the endoscope 1 configured in this way, the eyepiece I14 is
TV camera device via K connection device 8! 9 to project the inside of the body cavity i on the television monitor 17 for observation, and at the same time to bring the contact 21 of the electrocardiograph 20 into contact with the body surface of the patient 6 to measure the electrocardiogram. If the grounding wire 23 is not grounded and a large current is generated due to a failure or accident in the electrocardiograph 20, this current will flow from the contact 21 to the patient 6.

However, in the endoscope 1 whose insertion section 2 is inserted into the body cavity 7 of the patient 6, the eyepiece section 4 has a connecting plate 2 made of an insulator.
1 , the universal cord 6 is electrically insulated from the operating section 3 , and the universal cord 6 is also insulated from the light source device 11 by an insulating end plate 10 . Therefore, the running current flowing from the electrocardiograph 20 to the patient 6 is insulated by the connecting plate 27 and the insulating end plate 1o, and does not flow down from the television camera device 9 or the light source device 11, thereby preventing the electrocardiograph 20 from malfunctioning. There is no risk of the patient 6 being electrocuted by a large current generated by an accident.

Note that the eyepiece section 4 of the present invention may have a configuration as shown in FIG. 3. That is, in this embodiment, a flange 24m is integrally formed on the inner circumferential surface of the mounting tube 24 formed of an insulator, and the flange 24m presses the operating portion 3 to provide the eyepiece portion 4. According to such a configuration, it is possible to electrically insulate the operation part 3 and the eyepiece part 4 as in the above embodiment, or the insulation can be provided by the mounting tube 24 which is a component of the eyepiece part 4. Since it can be done, no extra parts are required and the configuration can be simplified.

As described above, in the present invention, the eyepiece section provided in the operation section of the endoscope to which the television camera device is connected is electrically insulated from the operation section by an insulator. If another medical device is used in contact with the patient's body at the same time as watching TV, and a large current is generated due to a malfunction or accident in that medical device, this large current will flow through the TV camera device. It is possible to eliminate the risk of the patient receiving an electric shock due to the large current passing through the patient's body.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing one embodiment of the present invention;
The figure is a cross-sectional view of the same <II@ part, and FIG. 3 is a cross-sectional view of the eyepiece part showing another embodiment of the present invention. 2... Insertion section, 3... Operation section, 4... Eyepiece section, 9
...TV camera device, 24...Mounting tube (insulator)
, 27... Connection plate (insulator).

Claims (3)

[Claims] (1) It consists of an insertion section and an operation section, and a television camera device can be connected to the operation section. The endoscope is provided with an eyepiece, and IF #11m indicates that the eyepiece is electrically insulated from the operation part by an insulator. (2) The endoscope according to claim 91, wherein the insulator is made of synthetic resin. (3) The endoscope according to claim 1, wherein the insulator is made of ceramic or other material.