JPH0210499Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Industrial Application Field) The present invention relates to an ultra-thin endoscope device that is inserted into a small hole for inspection.

(Prior Art) A conventional ultrafine endoscope device is configured as shown in FIG. That is, 100 in the figure is an ultra-fine endoscope, and the ultra-fine optical tube 101 (about 1 mm in diameter) of this ultra-fine endoscope 100 is inserted into a mantle tube 102 and set. At this time, the distal end of the optical viewing tube 101 is inserted into a small hole in the affected area, and the affected area is directly observed through the eyepiece 103 of the ultra-thin endoscope 100, and the image of the affected area is captured by the camera 104.
Take a photo with When photographing with the camera 104,
A camera 104 is installed in the eyepiece section 103 of the ultra-fine endoscope 100.
Attach. That is, a pin 105 is formed on the outer periphery of the eyepiece 103, and a guide groove 106 is formed in the camera 104, so that the pin 105 and the guide groove 106 are engaged with each other.

(Problem to be solved by the invention) In the above configuration, the correct work procedure after photographing is as follows. First, the camera 10 is inserted from the ultra-fine endoscope 100 while leaving the mantle tube 102 in the affected area.
4, and then insert the ultrafine endoscope 100 into the outer tube 102.
pull it out. Thereafter, another ultra-fine endoscope with a different viewing direction is inserted while leaving the distal end of the mantle tube 102 in the affected area. However, he forgot the above correct procedure and used the ultra-fine endoscope 10 with the camera 104 attached.
0 may be pulled out of the mantle tube 102. In this case, since the camera 104 is pulled out while holding the relatively heavy camera 104, delicate operations such as pulling out the optical viewing tube 101 while holding it coaxially with the mantle tube 102 are difficult, and the axis of the optical viewing tube 101 is aligned with the mantle tube. There have been cases where the rod-shaped lens housed inside the optical viewing tube 101 is broken due to bending stress deviating from the axis of the optical viewing tube 102 .

Structure of the invention (means for solving the problems) The present invention was made to solve the above problems, and its gist is an ultra-thin endoscope having an ultra-thin optical tube, and this ultra-thin endoscope. An ultra-thin endoscope apparatus is provided with a mantle tube for inserting and guiding an optical viewing tube, characterized in that a camera attachment mechanism is provided at the proximal end of the mantle tube.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4. The illustrated device is a device for examining joints. In the figure, numeral 10 is an ultra-thin endoscope. The ultra-fine endoscope 10 includes a rigid and ultra-fine optical tube 1.
1, a cylindrical portion 12 formed on the proximal end side of the optical viewing tube 11 and having a larger diameter than the optical viewing tube 11, and a flange-shaped eyepiece portion 13 formed on the proximal end side of the cylindrical portion 12. have.

Since the optical viewing tube 11 is well known, it will not be described in detail.
Inside, there is a rod-shaped objective lens 1 as shown in Figure 2.
4 and a relay lens 15 are housed therein. Further, the eyepiece section 13 houses an eyepiece lens 16 that is coaxial with the lenses 14 and 15 described above.

As shown in FIG. 3, a light guide cord 17 is connected to the cylindrical portion 12. As shown in FIG. The base end portion of the light guide cord 17 is protected by a hard pipe 17a whose one end is fixed to the cylindrical portion 12. A plug 18 is attached to the tip side of the light guide cord 17. An illumination optical fiber (not shown) extends from the distal end surface of the plug 18 through the light guide cord 17 to the distal end of the optical viewing tube 11. In addition, optical viewing tube 1
1, the optical fibers are arranged around the outer periphery of the objective lens 14 and the relay lens 15. Then, when the plug 18 is connected to the light source device 19,
Light from the light source device 19 is irradiated from the tip of the optical viewing tube 11 via an optical fiber.

The ultra-thin endoscope 10 is adapted to be inserted into a mantle tube 20. The mantle tube 20 has a cylindrical portion 21 and a proximal end portion 22 formed on the proximal side of the cylindrical portion 21 and having a larger diameter than the cylindrical portion 21 . A communication hole 23 is formed in the side wall of the cylindrical portion 21 for supplying cleaning water to the affected area and recovering it again. A housing hole 24 is formed in the base end portion 22 and matches the outer shape of the cylindrical portion 12 and the eyepiece portion 13 of the ultra-thin endoscope 10 .

A coil spring 25 and a steel ball 26 biased by the coil spring 25 are provided on the inner peripheral side of the base end portion 22 as a fixing mechanism for the ultrafine endoscope 10. On the other hand, the cylindrical part 1 of the ultra-thin endoscope 10
2 is formed with a recess 12a that engages with the steel ball 26.

As shown in FIG. 3, the proximal end 22 of the mantle tube 20
A slit 27 is formed in the slit 27, and the light guide cord 17 and pipe 17a of the ultra-thin endoscope 10 are led out from the slit 27.

A pin 26 is provided on the outer circumferential side of the base end 22 of the mantle tube 20 as a camera attachment mechanism. On the other hand, the cylindrical portion 31 of the camera 30 has an L at a position corresponding to the pin 28, as shown in FIGS. 1 and 4.
A letter-shaped guide groove 32 is formed. Further, a locking flange portion 35 is formed on the inner peripheral side of the cylindrical portion 31 . The camera 30 includes an optical system 33 and a film 34.
is stored.

The operation of the device having the above configuration will be explained. first,
A scalpel is inserted into the affected joint of the subject to create a wound for testing. On the other hand, an inner needle (not shown) is set in the outer tube 20. The inner needle is fixed within the outer tube 20 in the same manner as the ultrafine endoscope 10 described later.
In this state, the tip of the inner needle is connected to the cylindrical portion 21 of the outer tube 20.
protrudes from the tip of the Next, the outer tube 20 with the inner needle set is inserted into the examination wound of the affected area, and the inner needle is penetrated deeper into the affected area than the wound to form a small hole.

Next, the inner needle is pulled out while leaving the outer tube 20 in the examination wound, and the ultrafine endoscope 10 is inserted in its place. The ultra-fine endoscope 10 includes a cylindrical part 12 and an eyepiece part 13.
is aligned with the storage hole 24 of the mantle tube 20, the recess 1
When the steel ball 26 enters into 2a, it is fixed. In this fixed state, the distal end of the optical viewing tube 11 protrudes from the distal end of the cylindrical portion 21 of the mantle tube 20. Therefore, when the ultrafine endoscope 10 is inserted into the outer tube 20, the tip of the optical viewing tube 11 enters the inspection hole formed by the inner needle. Ultra-fine endoscope 10
After insertion, the inside of the affected area is observed with the naked eye through the eyepiece 13.

When taking images of the inside of the affected area, camera 3
Insert the pin 28 into the groove 32 of the camera 30.
The camera 30 is attached to the proximal end 22 of the mantle tube 20 by turning. In this state, camera 30
The locking flange 35 of the eyepiece 13 of the ultra-fine endoscope 10
Since the micro endoscope 10 is locked against the end surface of the micro endoscope 10, the micro endoscope 10 can be prevented from moving toward the camera 30, and damage to the camera 30 can be reliably prevented.

After the photographing is completed, the camera 30 is removed from the mantle 20 while leaving the mantle 20 in the affected area. Next, the ultra-thin endoscope 10 is pulled out from the mantle tube 20. That is, first, grasp the hard pipe 17a that protects the light guide cord 17, and insert the eyepiece 13 into the outer tube 2.
0 from the base end 22 of the eyepiece 13.
, and pull out the ultra-fine endoscope 10. On this occasion,
Since the camera 30 is attached only to the outer tube 20 and is not connected to the ultra-fine endoscope 10, it is impossible to pull out the ultra-fine endoscope 10 with the camera 30 attached, and it is recommended to always pull it out alone. Mandated by work procedures. Since the ultra-fine endoscope 10 is relatively light, if it is used alone, the outer tube 20 can be easily pulled out while remaining coaxial. Therefore, the optical viewing tube 11 can be prevented from being bent by hitting the outer tube 20, and the extremely thin objective lens 14 and relay lens 15 inside can be prevented from being bent.

After this, the optical viewing tube 11 with different fields of view is inserted into the outer tube 2.
0 and repeat the same operation as above.

The present invention is not limited to the above embodiments, and various embodiments are possible. For example, the present invention can be applied to the case where a television camera is attached instead of the above camera.

Effects of the Invention As explained above, in the present invention, the camera is attached to the outer tube. Therefore, since the ultra-thin endoscope is always pulled out from the mantle tube by itself, it can be pulled out without bending the optical viewing tube, and problems such as breaking the rod-shaped lens of the optical viewing tube can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an ultra-fine endoscope device that is an embodiment of the present invention, Fig. 2 is a diagram showing the optical system of the ultra-fine endoscope, and Fig. 3 is a side view showing the light guide cord lead-out mechanism. 4 is a side view showing a camera mounting mechanism, and FIG. 5 is a sectional view showing a conventional ultrafine endoscope device. 10... Extra-fine endoscope, 11... Optical viewing tube, 1
4, 15... Rod-shaped lens, 20... Mantle tube, 22
... Proximal end of the mantle tube, 28 ... Camera mounting mechanism (pin), 30 ... Camera, 32 ... Guide groove.

Claims (1)

[Scope of utility model registration request] In an apparatus equipped with an ultra-fine endoscope having an ultra-thin optical viewing tube and a mantle tube into which the optical sight tube of this ultra-fine endoscope is inserted and guided, a camera mounting mechanism is provided at the proximal end of the mantle tube. An ultra-fine endoscope device characterized by: