JPH0730005Y2 - Piping structure in endoscope - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvement of a piping structure in an endoscope.

[Conventional technology]

A treatment instrument insertion passage is formed in an endoscope in which forceps and other treatment instruments can be used, but generally, the treatment instrument insertion passage is also used as a suction channel. Therefore, such an endoscope has a treatment tool insertion mouthpiece that is attached to the exterior case that covers the operation portion of the endoscope by opening it outwardly, and a flexible member that is inserted into the insertion portion of the endoscope. A forceps channel made of a synthetic resin tube, a suction tube connected so as to communicate with a suction means, a connecting member for connecting the treatment tool insertion mouthpiece, the forceps channel and the suction tube to each other. Have

And in the conventional endoscope, the connection member is attached to the frame in the operation section separately from the treatment tool insertion mouthpiece attached to the outer case of the operation section, and the position and orientation of the connection member are determined by the frame. Was there.

[Problems to be solved by the device]

However, if the connection member and the forceps insertion mouthpiece are separately attached to the frame of the operation portion and the outer case, it may be difficult or impossible to assemble the connection member and the forceps insertion mouthpiece due to an error in each attachment position. May be.
Then, if they are forcibly assembled, problems such as a water leakage accident from the connection portion and a crack in the outer case made of synthetic resin occurring at a later date due to irregular residual stress have occurred.

In order to prevent the occurrence of such problems, it is necessary to increase the accuracy of each mounting position, but then it is inevitable that the machining cost of parts will greatly increase and the part acceptance rate will decrease.
The cost will increase significantly.

The present invention eliminates such conventional drawbacks and can reliably and reasonably connect the connection member and the forceps insertion mouthpiece,
Moreover, it is an object of the present invention to provide a piping structure for an endoscope that does not increase the cost.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the piping structure of the endoscope of the present invention comprises a treatment tool insertion mouthpiece that is attached to the exterior case that covers the operation portion of the endoscope by opening it outward, and an endoscope. The forceps channel made of a flexible synthetic resin tube inserted into the insertion portion, a suction tube connected so as to communicate with the suction means, the treatment tool insertion cap, the forceps channel, and the suction tube to each other. In a piping structure in an endoscope having a connecting member for communicating connection, the connecting member is attached to the outer case of the operation portion together with the treatment instrument insertion / insertion mouthpiece, and the connection to the treatment instrument insertion mouthpiece is performed. Characterize.

[Action]

The connection member and the treatment tool insertion cap are both attached to the exterior case of the operation portion and are connected for communication, and by the connection member,
The treatment tool insertion cap, the forceps channel, and the suction tube are connected and connected.

〔Example〕

 Embodiments will be described with reference to the drawings.

FIG. 3 is an overall view of the endoscope. A forceps channel 3 made of a flexible synthetic resin tube is inserted into the insertion portion 2 connected to the operation portion 1 over the entire length, and the tip of the insertion portion 2 is opened to the outside. Further, a treatment instrument insertion mouthpiece 4 communicating with the forceps channel 3 is provided below the operation portion 1 so as to project outwardly.

A suction operation valve 5 forms a part of the suction means, and is connected to a suction pump (not shown). And
The suction operation valve 5 and the forceps channel 3 are communicatively connected via a suction tube 6 provided in the operation portion 1.

FIG. 1 shows the structure of the lower part of the operation unit 1. 3 and 6 are the forceps channel and suction tube described above,
In FIG. 1, a rubber forceps plug 9 is detachably attached to a mouth 4a of a treatment instrument insertion mouthpiece 4 formed in a so-called luer lock shape.

Reference numeral 10 denotes an outer case made of synthetic resin that covers the operation portion 1, and a mounting hole 11 is formed in a protruding portion 10a for mounting the treatment instrument insertion cap 4.

A step 12 is formed at the back of the mounting hole 11,
A connection member 13 made of, for example, stainless steel is fitted in that portion. As shown by the arrow A in FIG. 2, the connecting member 13 can be fitted into the step 12 portion from the side in the outer case 10.

Then, the collar 13a protruding from the upper end side of the connecting member 13 has the step 1
It comes into contact with 2 and restricts the movement of the connecting member 13 in the axial direction.
Further, the outer surface of the body portion 13b of the connecting member 13 has a half-round polygonal shape, and a mounting hole into which the portion is fitted.
The inner part 11a of 11 is also formed in the same polygonal shape. As a result, the connection member 13 is in a state in which rotation is also restricted.

A forceps channel connection pipe 15 for connecting the forceps channel 3 and a suction tube connection pipe 16 for connecting the suction tube 6 are connected to the connection member 13 from directions different from each other by approximately 90 degrees, and silver brazing or the like is performed. Is stuck by.

The forceps channel connection pipe 15 is formed by being smoothly bent, but its radius of curvature is preferably as large as possible so as not to impair the insertability of the treatment tool. Further, in order to secure the freedom of movement of the position of the forceps channel 3, it is preferable that the forceps channel connection pipe 15 be as short as possible.

Therefore, the forceps channel connection pipe 15 is configured to be inserted into the connection member 13 as deeply as possible, and a portion that interferes with the passage on the suction tube 6 side is cut out. 15a is the notch. The forceps channel connection pipe 15 has an obliquely cut-out portion on the inside of the bend so that the treatment instrument can smoothly pass therethrough. 15b is the cutout portion.

Further, the retaining ring 1 is provided on the outer peripheral surface near each end of the forceps channel connection pipe 15 and the suction tube connection pipe 16.
8,19 are stuck. Then, the forceps channel 3 and the suction tube 6 are bonded so as to cover the outer periphery thereof. Therefore, the forceps channel 3 and the suction tube 6
And are joined to the connecting pipes 15 and 16 in a state that is very difficult to pull out. Reference numerals 20 and 21 are coils wound to further reinforce the adhesive strength and to prevent the tube from breaking.

The distal end portion of the treatment instrument insertion mouthpiece 4 has a connecting member 13 such that the inlet shaft of the forceps channel connection pipe 15 is aligned with the tube axis.
Is fitted to. 23 and 24 are O-rings for sealing.
A portion of the distal end of the treatment instrument insertion mouthpiece 4 is also cut out so as to interfere with the passage on the suction tube 6 side. 4a is the cutout portion.

The treatment tool insertion mouth ring 4 has a non-circular outer peripheral surface formed in the middle portion, and the mounting hole 11 side is also formed in the same non-circular shape and fitted therein. In FIG. 1, reference numeral 30 denotes a non-circular fitting portion, by which the rotation of the treatment instrument insertion cap 4 is restricted.

Reference numeral 26 denotes a pressing nut for pressing and fixing the treatment tool insertion cap 4 from the mouth side of the mounting hole 11 to the back side. By tightening the pressing nut 26, the treatment tool insertion cap 4 is fixed.
The connecting member 13 and the connecting member 13 are fixed to the outer case 10 together.
Therefore, the force in the same direction acts equally on the treatment instrument insertion cap 4 and the connecting member 13, and the two are connected in a watertight manner without difficulty.

The device of the above embodiment is assembled by the following procedure.

1) First, as shown in FIG. 2, the retaining ring 18,1
After the connection pipes 15 and 16 to which 9 is fixed are fixed to the connection member 13, the forceps channel 3 is connected and fixed to the forceps channel connection pipe 15.

2) The insertion section 2 of the endoscope is connected to an operation section frame (not shown) to allow various internal components to pass through the operation section frame, and the connecting member 13 is arranged in the operation section frame.

3) Connect and fix the suction tube 6 to the suction tube connection pipe 16.

4) The outer case 10 of the operation unit 1 is arranged at a predetermined position. At this time, the connecting member 13 is retracted to a position where it does not interfere with the outer case 10, and after the outer case 10 is set at a predetermined position, the connecting member 13 is connected from the outside through a mounting hole 11 using a rod, a wire, a coil, or the like. The member 13 is pulled up to a predetermined position.

5) The treatment tool insertion cap 4 is fitted into the mounting hole 11 from the outside to be fitted with the connecting member 13, and finally, the pressing nut 26
Tighten and fix.

The present invention is not limited to the above embodiment,
For example, dividing the treatment instrument insertion base 4 into a plurality of parts,
Various implementations are possible.

[Effect of device]

According to the piping structure of the endoscope of the present invention, since the connecting member and the treatment tool insertion cap are both attached and connected to the outer case of the operation portion, there is no deviation in the position or orientation between them. It has an excellent effect that the connection can be made without difficulty, the structure is simpler than the conventional one, and the parts cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment, FIG. 2 is a partial assembly view of the embodiment, and FIG. 3 is an overall configuration diagram of an endoscope of the embodiment. DESCRIPTION OF SYMBOLS 1 ... Operating part, 3 ... Forceps channel, 4 ... Treatment tool insertion mouthpiece, 6 ... Suction tube, 10 ... Exterior case, 11 ... Attachment hole, 13 ... Connection member, 15 ... Forceps channel connection pipe, 16
… Suction tube connection pipe.

Claims (1)

[Scope of utility model registration request] Claims: 1. A treatment instrument insertion mouthpiece attached to an exterior case for enclosing an operation section of an endoscope by opening it outward, and a flexible synthetic resin tube inserted into the insertion section of the endoscope. An endoscope having a forceps channel made of, a suction tube connected so as to communicate with a suction means, and a connection member for communicatingly connecting the treatment instrument insertion mouthpiece, the forceps channel and the suction tube to each other. In the piping structure in, a flange and a stepped portion that are in contact with each other on the side surface of the connection member and the inner surface of the outer case of the operation portion so as to restrict the connection member from axially moving relative to the outer case. And a non-circular cross-sectional portion that engages with each other so as to restrict rotation of the connecting member around the axis, and the connecting member together with the treatment instrument insertion / insertion mouthpiece is provided outside the operating portion. A piping structure in an endoscope, which is attached to a packaging case and connected to the treatment tool insertion cap.