JPS62189041A - Suction controller of 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 [Field of Industrial Application] The present invention relates to a suction control device for an endoscope for suctioning and removing dirt and the like within a body cavity.

[Conventional technology]

When using an endoscope to diagnose or test inside a body cavity,
If dirt accumulates in the body cavity, these tasks cannot be performed properly. Therefore, an endoscope is equipped with a suction control device to suction out any filth that accumulates in the body cavity.

Conventionally, as the above-mentioned suction control device, for example,
The one shown in Japanese Patent No. 23001 is known. That is, in this prior art, a guide tube is provided in a support tube (cylinder), and a slide tube (piston) is held in this guide tube with a cap made of an elastic material and is slidably provided therein. The support tube communicates with an endoscope-side channel and a suction tube, and the cap has a communication hole that communicates the internal space of the support tube with the outside air. Therefore, if the suction tube normally draws outside air through a through hole, or if the surgeon closes the communication hole with his or her finger, the suction force generated in the suction tube will be drawn into the internal space of the support tube. Since it acts on the channel through the channel, it is possible to suction and remove dirt from the body cavity.

[Problem that the invention seeks to solve]

However, according to the above-mentioned conventional technology, when the operator switches from a suction state in which the communication hole of the cap is closed with his fingers to a non-suction state in which the communication hole is opened, there is force from the channel into the support cylinder. Sucked body fluids and other filth may flow into the communication hole. This has the disadvantage that it is extremely unsanitary, as dirt adheres to the operator's fingers or scatters around.

This invention is an endoscope suction device that prevents dirt such as body fluids from adhering to the surgeon's fingers or scattering around when switching from a suction state to a non-suction state. [Means and actions for solving the problems] This invention aims to provide s tU.
The first connection hole 9 and the suction channel 1 to which the suction device is connected
The piston 22 is slidably inserted into the cylinder 8 formed with the second connection hole 11 to which the cylinder 4 is connected, and the cylinder 8 is provided with a through hole 19a that communicates this internal space with the outside air. An elastic member 31 is provided which allows communication between the first connection hole 9 and the second connection hole 1 indicated by L through the internal space of the cylinder 8 from the blocked state when the piston 22 is pushed in. Resistance members 34 and 35 are provided in the internal space of the cylinder 8 closer to the through holes 19a than the respective connecting holes to regulate the flow from the second connecting holes 1 to the through holes 19B. Then, dirt such as bodily fluids is removed from the resistor part 34, 35VC through the above-mentioned through hole 19a.
It is designed to prevent it from reaching .

〔Example〕

The first embodiment of this invention will be described below with reference to FIGS. 1 and 2. Refer to and explain. The endoscope 1 shown in FIG. 2 includes an operating section 2. The endoscope 1 shown in FIG. This operating section 2 is provided with a suction control device 3, and is connected to an insertion section 4 and a universal cord 5. The suction control device 3 is constructed as shown in FIG. The suction control device 3 has a cylinder 8 having a nine-diameter portion 6 with a screw 6a formed on its inner peripheral surface at one end and a small-diameter portion 7 at the other end. A first connecting hole 9 is formed in the axially intermediate portion of the peripheral wall of the cylinder 8, and a second connecting hole 1 is formed in the small diameter portion 7.

One end of a suction tube 12 is connected to the first connection hole 9, as shown in FIG. This suction tube 12
The other end is connected to a suction cap 13 provided on the operating section 2. A suction device (not shown) such as a vacuum pump is connected to this suction mouthpiece 13 . One end of the suction channel 14 is connected to the second connection hole 1no.

The other end of this suction channel 14 opens at the distal end of the insertion section 4 . Further, an airtight forceps mouth body 15 provided in the operating section 2 is connected to the suction channel 14 through a branch pipe 16.

An inner cylinder 17 is inserted and held within the cylinder 8.

This inner cylinder 17 has a support part 18 which has a smaller diameter than the middle part of the cylinder 8, and a screw 19 on the outer peripheral surface which has a larger diameter than the support part 18. It is formed from a mounting portion 19 in which If is formed.

The inner circumferential noa is held in the cylinder 8 with its mounting portion 19 screwed into the large diameter portion 6 of the E cylinder 8 and with an O-ring 2 interposed therebetween. A piston 22 is slidably inserted into this inner periphery 17. A cylindrical operating body 23 is provided at the upper end of this piston 22.
is attached by a holding plate 23a having a larger diameter than this. Further, a first elastic member 24 formed of rubber or the like in a ring shape is attached to the periphery of the holding plate 23a during construction. This first elastic member 24 is connected to the piston 2
2 when pressed down, it comes into contact with the upper end surface of the mounting portion 19 and closes the opening at the end of the mounting portion 19, that is, the through hole 19a.

Further, the lower end of the piston 22 is formed into a small diameter shaft part 26 via a stepped part 25, and this small diameter shaft part 26 is connected to the inner cylinder 1.
A through hole 27 is also formed at the bottom of the hole 7. A stopper 28 is attached to the projecting end of the small diameter shaft portion 26 to prevent the piston 22 from being pulled out of the inner cylinder 17.

A second elastic member 3 made of a material such as rubber and formed into a cylindrical shape is fixedly attached to the stopper 28 . Further, a spring 32 is provided within the support portion 18, thereby urging the piston 22 in the upward direction. When the piston 22 is biased by the spring 32, the first elastic member 24 is separated from the upper end surface of the mounting portion 19 of the inner cylinder 17, and the second elastic member 31 is moved away from the upper end surface of the mounting portion 19 of the inner cylinder 17.
The valve seat portion 8a is formed on the inner circumferential surface of the valve seat portion 8a. 1st
When the elastic member 24 is spaced from the upper end surface of the mounting part 19, the cylinder 8 is leaked through the leak hole 33 formed in the support part 18 of the inner cylinder 17 and the through hole J9a formed in the mounting part 19. The internal space of the air is communicated with the outside air. Further, the second elastic member 31 comes into contact with the valve seat portion 8a, so that the cylinder 8
Communication between the internal space of the suction channel 14 connected to the second connection hole 11 is cut off. On the other hand, piston 2
2 is pushed in against the biasing force of the spring 32, the first elastic portion 424 comes into contact with the upper end surface of the mounting portion I9 and closes the through hole 19a.
, the communication state between the internal space of the cylinder 8 and the outside air is cut off, and the contact state y^1 between the second elastic member 3 and the valve seat portion 8a is released, so that the internal space of the cylinder 8 is closed. and the suction channel 14 communicate with each other.

Further, on the inner circumferential surface of the cylinder 8, which is the internal space of the cylinder 8, and on the outer circumferential surface of the inner cylinder 17, a first protrusion 34 and a second protrusion 34, each having a roughly triangular cross section, are provided as a resistance part assembly. 35 are provided protruding from each other over the entire circumference. These protrusions 34.degree. and 35 are formed in a portion between the first connection hole 9 and the through hole 19a with slight vertical deviations.

Therefore, the passage resistance from the second connection hole J1 to the through hole 19a in the internal space of the cylinder 8 is increased by the respective protrusions 34 and 35. In other words, it is difficult for dirt such as bodily fluids sucked into the cylinder 8 to flow into the T-shaped hole 19a.

Next, the operation of the above-mentioned suction control device 3 will be explained. First, when a suction operation is not required, the piston 22 is kept raised by the urging force of the spring 32, as shown in FIG. Then, the first elastic member 24
Since the lower end of the suction tube 12 is separated from the upper end surface of the mounting portion 19, the suction tube 12
and the outside air, and the second elastic member 31 is connected to the valve seat ms.
By coming into contact with a, communication between the internal space of the cylinder 8 and the suction channel 14 is cut off. Therefore, the suction force generated in the suction tube 12 does not act on the suction tube 14, and the outside air is suctioned.

When performing a suction operation, the piston 22 is pushed in against the biasing force of the spring 32 by placing a finger on the presser plate 23B holding the operating body 23. Then, the first elastic member 24 comes into contact with the upper end surface of the mounting portion 19 and closes the through hole 19a.
Communication between the suction tube 12 and the outside air is cut off. Further, since the contact state between the second elastic member 31 and the valve seat portion 8a is released, the suction tube 12 and the suction channel 14
are in communication with each other through the internal space of the cylinder 8. Therefore, the suction force generated in the suction tube 12 acts on the suction channel 14, thereby making it possible to suction and remove dirt and the like within the body cavity.

By the way, in the suction control device 3 having the above structure, when the piston 22 is changed from the suction state in which it is pushed in to the non-suction state in which the piston 22 is released from the push-in state, the suction type is forcefully drawn into the internal space of the cylinder 8. Body fluids and other filth that are present in the cylinder 8 tend to scatter to the outside from the through hole 19a at the upper end of the mounting portion 19. However, in the internal space of the cylinder 8, there is a first protrusion that increases the flow resistance of this internal space. A strip 34 and a second protrusion 35 are provided.Therefore, during the switching operation, the internal space of the cylinder 8 is closed to the through hole 19a.
Even if the cylinder 8 is communicated with the outside air through the cylinder 8, the contaminants inside the cylinder 8 can be prevented from scattering to the outside through the first through hole 19a by the respective protrusions 34 and 35.

FIG. 3 shows a second embodiment of the invention, which differs from the first embodiment in the resistance member. That is, in this embodiment, a groove 41 is formed on the outer peripheral surface of the support part 18 of the inner cylinder 17 as a resistance member, and a blade-like member 42 is formed by molding an elastic material such as rubber into a skirt shape in the groove 4. I installed it.

Even in such a structure, the dirt sucked into the cylinder 8 by the wing-like member 42 can be prevented from scattering to the outside through the through hole 19a.

FIG. 4 shows a third embodiment of the present invention, in which the inner peripheral surface of the through hole 19af formed in the mounting portion 19 is 15I.
The outer peripheral surface of the operating body 23 is formed into a tapered surface 23b at an angle corresponding to the taper 119b.
was formed. In this way, when the piston 22 is pushed in, the opening degree of the through hole 19a is adjusted to the level of the pair of tapered surfaces 1.
Since the suction force is gradually decreased by ri) fy23b, the suction force generated in the second connecting hole 1 can be finely adjusted.

〔Effect of the invention〕

As described above, according to the present invention, when switching from a suction state to a non-suction state, body fluids and other filth that are forcefully suctioned into the internal space of the cylinder are vented to the outside air through the internal space. In order to prevent the particles from scattering to the outside, a resistor member was provided in the internal space. Therefore, when the above-mentioned dirt adheres to the operator's fingers during the switching operation,
θj to prevent unsanitary situations such as scattering into the surrounding area.
It has the advantage that it can be stopped.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a sectional view of a suction fMIJ control device showing a first embodiment of the present invention, FIG. 2 is a schematic diagram of the endoscope, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a sectional view of a portion of a suction control device showing a third embodiment of the present invention. 8... Cylinder, 9... First connection hole, 11...
Second connection hole, 12... Suction tube, 22... Piston, 24... First elastic part f, J, 34.35
... Projection (resistance member) %42 ... Wing-shaped member (resistance member). d1 applicant's agent Patent attorney Jun Tsuboi 11
% 20 Series 剋国 1114 Figure 3 3a No. 41 Go Proceedings Rectification Book +y (pn @, "nICn 'pII' Director General of the Correction Agency Mr. Uga Michibu ■, 'Old' To Indication Patent Application 1986-32221 No. 2, Name of the invention Endoscope suction control device 3, When corrected, IVI surface patent applicant 7 Lake! (037) Olympus Optical-1 Changmi Co., Ltd. 11:4, Agent 5, voluntary amendment, 7. In the statement of contents of the amendment, page 8, lines 11 to 12, "second elastic member 3" was replaced with "second elastic member 3". 3 no,” he corrected.

Claims (1)

[Claims] a cylinder in which a first connection hole to which the suction device is connected and a second connection hole to which the suction channel is connected; a piston slidably inserted into the cylinder; and a piston provided in the cylinder and provided in the cylinder. a through hole that communicates the internal space of the cylinder with the outside air; and an elastic member that connects the first connecting hole and the second connecting hole from a blocked state through the internal space of the cylinder when the piston is pushed in. , a resistance member provided closer to the through hole than each of the connection holes in the internal space of the cylinder and regulating the flow from the second connection hole to the through hole. suction control device.