JPH0133043Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an endoscope that removes dirt adhering to the operation wire for raising and operating the treatment instrument, and enables smooth reciprocation of the operation wire. .

(Prior Art) As is well known, an endoscope is used to observe the inside of a human body cavity. For example, FIG. 4 shows a distal end portion 4' of a conventional endoscope. This distal end component 4' is connected to the distal end 3a' of the insertion section 3'. A water pipe 10' is disposed within the insertion portion 3'. The tip of this water pipe 10' is connected to the base end of the tip component 4' and communicates with the injection nozzle 5'. If the observation window 6' provided in the distal end component 4' becomes dirty with body fluids inside the body cavity,
Cleaning is performed by spraying cleaning and disinfecting water supplied from a water pipe 10' from a spray nozzle 5'.
Further, a spiral pipe 14' is disposed within this water pipe 10'. An operating wire 16' is inserted into this spiral tube 14'. This operating wire 16'
is inserted into an insertion hole 20' drilled in the base of the tip component 4', and its tip is connected to the guide element 2.
3'. This guide 23' is rotatably supported in a storage chamber 22' formed in the tip component 4', and is rotated by the operation wire 16' to erect the tip of the forceps 25'. It is now possible to do so. An annular packing 21' is provided midway through the insertion hole 20'.
There is no gap between the annular packing 21' and the operating wire 16', and the operating wire 16' is sealed by the annular packing 21'. and,
When the operating wire 16' is moved backward, most of the dirt adhering to the operating wire 16' is scraped off by an annular gasket 21'. Also,
Dirt remaining on the operating wire 16' is washed away with cleaning water for cleaning the observation window 6' flowing inside the water pipe 10'.

(Problems to be Solved by the Invention) However, the conventional means for removing dirt adhering to the operating wire 16' has the following drawbacks. That is, the dirt removed by the annular packing 21' accumulates in the insertion hole 20' in front of the annular packing 21', which is unsanitary.
This dirt hardens and makes it impossible for the operating wire 16' to move forward and backward.

Structure of the device (means for solving the problem) This device was created to solve the above problem, and its gist is (a) the delivery from the hand operation section to the distal end component via the insertion section. a water pipe; (b) an injection nozzle for cleaning the observation window that is provided in the tip component and communicates with the water pipe; and (c) a spray nozzle that is provided in the water pipe, one end of which is connected to the hand control unit and the other end of which is connected to the tip. a spiral tube that communicates with the component; and (d) a spiral tube provided within the spiral tube, one end of which is connected to the operation knob of the hand control section, and the other end of which is inserted into the insertion hole provided in the tip component. an operating wire; (e) an annular gasket provided in the insertion hole into which the operating wire is inserted to remove dirt attached to the operating wire; and (f) a storage formed in the tip component. In an endoscope that is housed in a room and is equipped with a guide that rotates and raises a treatment instrument when driven by the operating wire, a minute gap is formed between the operating wire and the annular gasket. The endoscope is characterized by:

(Example) Hereinafter, an example of this invention will be described based on the drawings of FIGS. 1 to 3.

Reference numeral 1 in FIG. 1 is an endoscope. This endoscope 1
, a hand control section 2, an insertion section 3 consisting of a flexible tube, etc.
and a distal end forming section 4 connected to the distal end 3a of the insertion section 3. Tip 3a of insertion section 3
The bending operation can be performed remotely using each angle operation knob (not shown) of the hand operation unit 2.

The tip component 4 is provided with an injection nozzle 5, an observation window 6 facing the injection nozzle 5, and an illumination window (not shown), respectively. Observation window 6 above
is transmitted to the eyepiece section 7 of the hand operation section 2 via an objective lens system installed in the distal end component 4 and an image transmission optical system (not shown) consisting of an optical fiber bundle installed inside the insertion section 3. It is optically connected to an internal eyepiece system. The illumination window is connected to a plug 9 at the tip of the cable 8 via an illumination transmission optical system (not shown) consisting of the insertion section 3, the hand control section 2, and an optical fiber bundle installed in the cable 8.
optically connected to. This plug 9 is connected to a light source device (not shown).

A water pipe 10 is arranged from the hand operation section 2 through the insertion section 3 to the distal end component 4. One end of this water pipe 10 communicates with a water supply channel 11 . This water supply channel 11 passes from the hand control section 2 through the cable 8 and opens at a plug 9. A valve 12 is provided in the water supply channel 11 of the hand operation unit 2. Further, the other end of the water pipe 10 is connected to a pipe 13 fixed to the base end of the tip component 4, and communicates with the injection nozzle 5.

A spiral pipe 14 is disposed within the water pipe 10. One end of this spiral tube 14 is connected to the hand control unit 2
The other end is connected to a pipe 15 fixed to the base end of the distal end component 4. An operating wire 16 is inserted into this spiral tube 14 . One end of this operating wire 16 is connected to a rack 17. This rack 17 is
It meshes with a pinion 19 fixed to the operation knob 18 of the hand operation section 2. In addition, the operation wire 1
The other end of the tip 6 is inserted into an insertion hole 20 formed in the base of the tip component 4.

The diameter of the insertion hole 20 is formed to be slightly larger than the diameter of the operating wire 16. An annular packing 21 is provided in the middle of the insertion hole 20. The annular packing 21 has an inner diameter slightly larger than the operating wire 16, and a small gap H is formed between the annular packing 21 and the operating wire 16.

A storage chamber 22 is formed in the tip forming portion 4 . A guide 23 is housed within this storage chamber 22. The tip of the operating wire 16 is connected to one side of the guide 23 . Further, the guide 23 is configured to rotate about a shaft 24 by the reciprocating motion of the operating wire 16, thereby allowing the forceps 25 (treatment instrument) to be raised or lowered. Note that the forceps 25 are inserted through the forceps port 26 of the hand operation section 2, and are passed from the hand operation section 2 to the insertion section 3.
A channel 27 that reaches the proximal end of the distal end component 4 through
It is inserted through the inside and protrudes toward the storage chamber 22 side.

In the above-described configuration, when the endoscope 1 is inserted into a body cavity and used, the forceps 25 are inserted into the channel 27 from the forceps opening 26, and the distal end thereof is passed through to the storage chamber 22 of the distal end component portion 4. At this time, the guide 23 is laid down in the storage chamber 22, and the tip of the forceps 25 is guided by the upper surface of the guide 23 to protrude from the tip component 4 to the outside. In this case, forceps 25
The tip protrudes at a small inclination angle with respect to the longitudinal direction of the insertion section 3.

When the forceps 25 are to be erected at an even larger angle, when the operating wire 16 is moved back by operating the operating knob 18, the guide 23 is rotated upward about the shaft 24. This allows the tip of the forceps 25 to stand up.

During use, dirt such as body fluids in the body cavity adheres to the operating wire 16, but most of this dirt is
It is removed with an annular packing 21. That is, there is a gap H between the operating wire 16 and the annular packing 21.
If a gap H is formed, the amount of dirt to be removed should be reduced by the gap H. However, since the operating wire 16 is not a rigid body and has flexibility, the operating wire 16 is loosened, so that the size of the gap H is different at each portion in the circumferential direction of the annular packing 21. At locations where the gap H is small, most of the dirt adhering to the operating wire 16 is scraped off. Moreover, the location where the gap H becomes smaller changes depending on the operation of the operation wire 16 and the orientation of the tip component 4. Therefore, regardless of the existence of the gap H, most of the dirt attached to each part of the operating wire 16 is scraped off by the annular packing 21. However, if the size of the gap H is made too large, it becomes impossible to remove the dirt attached to the operating wire 16. The size of the gap H is set through experiments or the like within a range in which the above-described scraping can be performed. The scraped dirt accumulates in the insertion hole 20 in front of the annular packing 21. Further, dirt in the body cavity may adhere to the observation window 6 of the distal end component 4. In this case, cleaning and disinfecting water is supplied to the water pipe 10 by operating the valve 12 of the hand-held operation unit 2, and this cleaning and disinfecting water is sprayed from the spray nozzle 5 onto the observation window 6 for cleaning. At this time,
Since a gap H is formed between the annular gasket 21 and the operating wire 16, a portion of the cleaning and disinfecting water also flows into the insertion hole 20. As a result, dirt accumulated inside the insertion hole 20 can be completely cleaned and disinfected. As a result, it is not only extremely hygienic, but also prevents dirt from hardening inside the insertion hole 20.
The operating wire 16 can be smoothly reciprocated. Therefore, stable rotation of the guide element 23 is always obtained, and the tip of the forceps 25 can be smoothly raised.

Note that the gap H is determined so that a sufficient amount of cleaning and disinfecting water can be supplied to the observation window 6, and the amount of this supply and the amount of supply to the insertion hole 20 are in a desired ratio (for example, 8:2). Ru.

This invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, cleaning water and air may be selectively supplied to the water pipe.

Effects of the invention As explained above, in this invention, by providing a minute gap between the annular gasket provided in the insertion hole of the tip component and the operating wire, the observation window cleaning A part of the cleaning water can flow into the insertion hole through the annular packing, and dirt accumulated in the insertion hole can be washed away by being scraped off by the annular packing. As a result, it is hygienic and dirt does not harden inside the insertion hole, so the reciprocating movement of the operating wire is always performed smoothly.

[Brief explanation of the drawing]

The drawings from Fig. 1 to Fig. 3 show one embodiment of this invention, Fig. 1 is a general schematic side view of the endoscope, and Fig. 2 is an enlarged sectional view of the distal end component of the endoscope. 3 are further enlarged cross-sectional views of essential parts, and FIG. 4 is an enlarged cross-sectional view of the distal end component of a conventional endoscope. 1... Endoscope, 2... Hand operation section, 3... Insertion section, 4
...Tip component, 5...Injection nozzle, 6...Observation window, 1
0... Water pipe, 14... Spiral tube, 16... Operation wire,
18...operation knob, 20...insertion hole, 21...annular gasket, 22...storage chamber, 23...guide, 25...forceps (treatment tool), H...gap.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) A water pipe leading from the hand control section through the insertion section to the tip component, and (b) An observation window cleaning tube provided in the tip component and communicating with the water pipe. an injection nozzle; (c) a spiral tube provided within the water pipe, one end communicating with the hand control section and the other end communicating with the tip component; (d) a spiral tube provided within the spiral tube, one end communicating with the hand control section. (e) an operating wire connected to the operating knob and whose other end is inserted through an insertion hole provided in the tip component; (e) an operating wire provided in the insertion hole for removing dirt attached to the operating wire; an annular packing into which the operating wire is inserted; (f) a guide which is housed in a storage chamber formed in the distal end component and rotates when driven by the operating wire to erect the treatment tool; An endoscope comprising: a minute gap is formed between the operation wire and the annular packing.