JPS6243528Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope with an improved channel structure for guiding a treatment instrument into a body cavity.

Generally, the operation section of an endoscope is provided with an insertion port body for guiding a treatment instrument into a body cavity through a channel. This insertion port body is provided at an angle with respect to the axis of the operating section so that the operator can easily insert and remove the treatment instrument while looking into the eyepiece section. The channel is therefore curved within the operating part and leads to the insertion part connected to this operating part.

Conventionally, in the channel, the curved portion inside the operating section was formed from a rigid pipe, and the other portion was formed from a flexible tube. In other words, when inserting the treatment instrument into the channel from the insertion port body, the tip of the treatment instrument strongly hits the curved part of the channel. This is because the problem of damage occurs.

However, if the channel is made of a hard pipe and a flexible tube, the number of parts increases, which complicates the assembly work, and the treatment instrument gets caught in the stepped part of the connection, making it difficult to insert and remove it. Not only is there a problem in that it may not be possible to perform the procedure smoothly, but since a hard pipe is connected to the insertion port body, a stepped portion may also be formed at this connection portion, and the treatment instrument may get caught. Furthermore, there is an endoscope in which the insertion port body is provided at the lower end of a grip part formed in the operation part for the operator to grasp, that is, at the connection end side with the insertion part, to further improve the insertion and withdrawal operation of the treatment instrument. However, in such an endoscope, if the channel is formed of a hard pipe and a flexible tube as described above, the hard pipe and the hard pipe and flexible tube are formed below the insertion port body of the operating section. Since a space must be secured to accommodate the connection part with the endoscope, the operation part becomes longer by that amount, which has the disadvantage of reducing the operability of the endoscope.

This idea was made based on the above circumstances,
The purpose of this is to form the channel with only a flexible tube so that the curved part within the operating section will not be damaged by the treatment instrument, thereby simplifying the configuration and the insertion and removal of the treatment instrument. It is an object of the present invention to provide an endoscope that facilitates the operation and that does not cause an increase in the length of the operating section.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 in FIG. 1 denotes an endoscope, and this endoscope 1 consists of an operating section 2 and an insertion section 3. The operation unit 2 is a third
As shown in the figure, it is formed by joining a pair of covers 4, 4, and an eyepiece part 5 is provided on the upper end surface along the axis of the operating part 2, and an operating knob 6 is provided on one side of the upper part. , a universal cord 7 is provided on the other side. Furthermore, the operating section 2 is formed with a grip section 8 which is thinner than the upper end section and is intended for the operator to grasp at a portion below the operation knob 6. A mounting portion 10 having a mounting hole 9 communicating with the inside of the operating portion 2 is provided on the connection end side with its axis inclined with respect to the axis of the operating portion 2 . The mounting hole 9 has a cylindrical insertion opening body 11.
is inserted into the operating section 2 with its tip protruding into the operating section 2. A valve body 12 made of an elastic material and capable of opening and closing is provided in the rear end of the insertion port body 11, and this valve body 12 is held by a retaining nut 13 screwed onto the rear end of the insertion port body 11. There is.

A first connection port body 14 is held on the inner peripheral surface of the lower end of the operating portion 2, and a second connection port body 1 is held on the outer peripheral surface of the collar portion 14a formed on the first connection port body 14.
5 is screwed on. A flexible tube 16 forming the insertion portion 3 is connected to the first connection port 14, and a tapered bending member 17 that covers the outer circumference of the end of the flexible tube 16 is connected to the second connection port 15. has been done.

On the other hand, one end of a flexible tube 18 forming a channel is fitted onto the end of the insertion port body 11 that protrudes into the operating section 2, and this connecting portion is fixed with a holding nut 19. This flexible tube 1
8 is inserted into the soft tube 16 after being curved within the operating section 2 because the insertion port body 11 has its axis inclined with respect to the axis of the operating section 2 . The outside of the curved portion 18a of the flexible tube 18 is connected to a curved surface 2 of a guide member 20 which is protruded from the inner surface of one cover 4 forming the operation section 2.
0a, and the curved state is maintained by this contact.

According to the endoscope 1 having the above configuration, the first
As shown in the figure, when a treatment instrument 21 such as forceps is inserted into the flexible tube 18 from the insertion port body 11 while elastically deforming the valve body 12, the tip of the treatment instrument 21 is inserted into the flexible tube 18. It is unavoidable that it hits the outer inner surface of the curved portion 18a. However, since the outside of the curved portion 18a of the flexible tube 18 is in contact with the curved surface 20a of the guide member 20 and the curved state is maintained, even if the tip of the treatment instrument 21 hits this portion, The guide member 20
The curved surface 20a prevents the curved portion 18a of the flexible tube 18 from being deformed or damaged.

That is, according to the above configuration, even if the entire channel is formed of the flexible tube 18 without using a hard pipe for the curved portion of the channel, damage to the curved portion of the flexible tube 18 can be reliably prevented. be able to.

In the above embodiment, the endoscope 1 is described in which the insertion port body 11 is provided at the lower end of the grip portion 8 of the operating section 2, but the endoscope 1 is described in which the insertion port body 11 is provided at the upper end of the operating section 2. It goes without saying that the present invention is also applicable to the endoscope 1.

As described above, in the present invention, the entire channel is formed of a flexible tube, and a guide member is provided in the operating section to maintain this curved state by contacting the curved outside of the flexible tube. Even if the treatment tool inserted into the tube hits the curved portion of the flexible tube, the guide member prevents this portion from being damaged. Therefore, the channel can be formed only with a flexible tube without using a rigid pipe, which simplifies the configuration by reducing the number of parts. Unlike a conventional channel in which a flexible tube is connected to a pipe, there is no step formed at each connection portion, and the treatment instrument is not caught on these steps, making it difficult to insert and remove the treatment instrument smoothly. Furthermore, in an endoscope in which the insertion port body is provided on the connection end side of the operation section with the insertion section in order to facilitate the insertion and removal of the treatment instrument, the portion of the operation section that is closer to the insertion section than the insertion port body is Since there is no need to secure space to accommodate the rigid pipe or the connecting part between the rigid pipe and the flexible tube as in the past, the operating section can be shortened accordingly, improving the operability of the endoscope. can be done.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an overall view, FIG. 2 is a sectional view of the operating section, and FIG. 3 is a sectional view taken along the line of FIG. 2. 2... Operation section, 3... Insertion section, 11... Insertion port body, 1
2... Flexible tube, 18a... Curved portion, 20...
Guide member, 20a...curved surface.

Claims (1)

[Scope of utility model registration request] An insertion port body for a treatment instrument is provided in the operating section of the endoscope at an angle with respect to this axis, and a flexible device whose one end is connected to this insertion port body and the other end is inserted from the operating section to the insertion section. 1. An endoscope comprising: a tube; and a guide member provided within the operating section and abutting against the curved outside of the flexible tube to maintain the curved state of the flexible tube.