JP3217996B2 - Endoscope suction operation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction operation section of an endoscope.

[0002]

2. Description of the Related Art An endoscope is provided with a base grip and a body insertion portion projecting from the base grip, and the body insertion portion may be provided with a suction channel. The suction operation section structure is provided on the proximal end grip, and by operating the suction operation section structure, the inside of the suction channel is brought into a suction state, and sputum or the like in the bronchi is sucked through the suction channel.

By the way, this type of conventional suction operation section structure has, for example, an upper opening cylinder whose lower opening is connected to a suction channel, and a suction hole which is fitted in the cylinder and has a side portion. An inner cylinder, a valve body made of an elastic material provided in the cylinder and covering a lower opening of the inner cylinder, and a valve body which is inserted into the inner cylinder so as to be able to advance and retreat, and is pushed down by the pushing operation. An operating member projecting from the opening and opening the slit provided in the valve body, and a cover member made of an elastic material for elastically returning the operating member to a fixed position from a pushing operation state of the operating member There was something with. A suction device is connected to the suction hole of the inner cylinder via a base or the like.

That is, normally, a hole formed in a side portion of the cover member and a suction hole of the inner cylinder are in communication with each other, and a lower opening of the inner cylinder is covered with a valve body. As a result, the suction channel and the inner cylinder are brought into a non-communication state, whereby air enters the suction operation portion structure from the hole of the cover member and exits through the suction hole, so that the suction channel does not enter the suction state and enters the body. Body fluid is not sucked.

However, if the operation member is pushed in, the slit of the valve body is opened by the operation member,
The hole formed in the cover member and the suction hole of the inner cylinder are not in communication with each other, and the suction device and the suction channel are in communication with each other, so that the suction channel is in a suction state and the body fluid or the like is sucked into the body. You.

[0006]

However, in the above-described suction operation portion structure, the operation member is pushed in to open the slit of the valve body in order to make the suction state.
When the distal end of the operation member protrudes into the slit and returns to the original non-sucking state, it does not return to the original state due to being caught, or by being used for a long time, In some cases, the mating surfaces of the slits were chipped or worn, so that the mating surfaces could not be properly fitted, and the lower opening of the inner cylinder could not be covered.

In addition, the number of parts as a whole is large, inventory management is troublesome, and disassembly / assembly is troublesome, making it difficult to clean.

Therefore, the suction operation section of the endoscope which has a small number of parts as a whole, is easy to disassemble and assemble, is easy to clean, and can perform the switching operation stably and reliably over a long period of time. The purpose is to provide a structure.

[0009]

In order to achieve the above-mentioned object, an endoscope suction operation structure of an endoscope according to the present invention comprises a proximal grip and a body insertion portion protruding from the proximal grip. A suction operation portion structure provided on the proximal grip of the endoscope provided with a tubular portion having an opening portion connected to a suction channel in the body insertion portion and connected to a suction source. A casing having a port portion,
The lower half is removably fitted to the cylindrical part of the casing, and the upper half protrudes to the outside in the shape of a drum that can be flat, and is connected to the upper half to the outside. A hole for air suction is provided, and a communication hole connected to the port of the casing is provided in the lower half, and the upper half and the lower half are integrally formed.
A cylindrical body made of elastic material, and an upper opening of the upper half of the cylindrical body, which is detachably engaged with the cylindrical body, covers the upper opening, and is in a free state. The air suction hole and the communication hole are pushed up to communicate with each other , and
An operation button portion for shutting off the lower half and the upper half while the upper opening is covered by pressing down along with the elastic deformation of the half to the flat shape, and being integrally connected to the operation button; Both are loosely inserted into the lower half of the tubular body, and when the tubular body is in a free state, its lower bulging portion covers the lower opening of the lower half of the tubular body to allow the communication. A rod-shaped part in which the hole and the opening of the cylindrical part are in a non-communicating state, and the cover of the lower bulging part is released by a pressing operation of the operating part, so that the communicating hole and the opening are in a communicating state. And with.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 3 shows an endoscope provided with a suction operation portion structure according to the present invention. The endoscope includes a base grip 1 and an insertion portion 2 protruding from the base grip 1. The body insertion section 2 is inserted into a body, for example, a bronchus or the like, to observe an affected part or to aspirate a body fluid or the like in the body.

For this purpose, an image guide, a light guide, a swinging operation wire, a suction channel, and the like are inserted into the insertion portion 2 (not shown). That is,
At the distal end of the image guide, an objective lens provided at the distal end of the insertion portion 2 is continuously provided, and at the proximal end thereof, an eyepiece provided at the proximal end of the proximal grip 1 is provided continuously. Enables observation of The light guide is composed of a plurality of fiber strands and is inserted into a light guide plug of a branch pipe 3 branched from the base grip 1. And
The light guide plug is connected to a lamp (not shown), and irradiates light from the lamp to a site to be observed or the like. In FIG. 3, reference numeral 6 denotes a focus adjustment dial.

In this case, the swinging operation wire is 2
It has a book, each distal end is fixed to the distal end of the insertion section 2, and each proximal end is connected to a swing operation lever 4 provided on the proximal grip 1. The swing operation lever 4 is moved from the neutral state shown in FIG. 3 (in this case, the state in which the tip swing section 5 is linear).
When swinging to one of the arrows, one of the oscillating operation wires is pulled toward the proximal grip 1, and the distal oscillating portion 5 is moved from one side to the other as shown by an imaginary line. When the swinging operation lever 4 is swung to the other side of the arrow, the other swinging operation wire is pulled toward the base end grip 1 and the imaginary line is formed. As shown in the figure, the distal end swinging portion 5 bends to the other side to be in a swinging state.

Thus, the suction operation section structure according to the present invention is provided on the proximal grip 1, and the suction operation section structure is configured to suction the body fluid or the like through the suction channel while holding the proximal grip 1. In addition, it is possible to perform a switching operation to a non-suction state in which a body fluid or the like is not sucked.

As shown in FIG. 1, the suction operation portion structure is such that a casing 9 having a tubular portion 7 and a port portion 8 and a lower half portion 10 is removably fitted to the tubular portion 7 of the casing 9. The upper half 11 of the casing 9 is made of an elastic material protruding from the tubular portion 7 of the casing 9, and the operating member 13 is inserted into the tubular body 12.
And.

The cylindrical portion 7 of the casing 9 has its lower end (base end) fixed to the base grip 1. That is, the hole of the cylindrical portion 7 has a large-diameter portion 14 and a small-diameter portion 15,
The cylindrical body 12 is fitted into the tube 14, and the suction channel is connected to the small-diameter portion 15 so that the small-diameter portion 15 becomes an opening S that is connected to the suction channel. The port 8 of the casing 9 is connected to a suction source (suction device) (not shown).

Further, as described above, the cylindrical body 12 includes the upper half 11
The lower half 10 has a circumferential notch 16 at the upper end of the outer peripheral surface, and the inner flange 17 at the upper open end of the cylindrical portion 7 is formed in the notch 16. Mated. And the lower half
When 10 is fitted into the cylindrical portion 7, its outer peripheral surface is in close contact with the inner peripheral surface of the large-diameter portion 14 of the cylindrical portion 7 (omitting the notch 18 at the lower end).

The lower half 10 of the tubular body 12 is provided with a plurality of communication holes 20 communicating with the port portion 8. Each communication hole 20 is connected by a circumferential groove 21. ing. Also,
A circumferential cutout 22 is provided at the lower end of the inner peripheral surface of the lower half 10.

In this case, the upper half 11 of the tubular body 12 is
It has a diameter larger than 10 and its central part in the axial direction is bulged to form a so-called drum shape. The lower end surface 23 is in close contact with the upper surface 24 of the cylindrical portion 7, and an inner flange 25 is provided in the upper opening thereof, and the inner flange 25 fits into the concave peripheral groove 26 of the operation member 13. A plurality of air suction holes 27 through which air is sucked are formed in the upper half 11 at the axial center thereof.

Thus, the operation member 13 is provided with an operation button portion 28 which is removably engaged with the upper opening of the upper half portion of the cylindrical body 12.
And a rod-shaped portion 29 integrally connected to the operation button portion 28, and the cylindrical body 12 is provided in a concave peripheral groove 26 provided in the operation button portion 28.
The inner flange 25 of the upper half portion 11 is engaged so as to be disengageable.

That is, the operation button section 28 is
And a small disk 28b provided on the lower surface of the disk 28a and having a tapered lower surface.
The concave peripheral groove 26 is provided on the outer peripheral surface of the cylindrical body 12, and the upper opening of the upper half portion 11 of the cylindrical body 12 is covered with the inner flange 25 engaged with the concave peripheral groove 26. When the operation button portion 28 is pressed as shown by an arrow A in FIG. 2, the lower surface 30 of the disc-shaped body 28a of the operation button portion 28 becomes the inner bottom surface 31 of the upper half portion 11 of the cylindrical body 12.
To cut off the upper half 11 and the lower half 10. When the operation button portion 28 is pressed as shown by an arrow A in FIG. 2, the upper half portion 11 of the tubular body 12 is made of an elastic material and has a drum shape as described above. As shown in FIG. 2, the upper half 11 can be easily made flat.

The rod portion 29 has a main body portion 32 whose outer diameter is sufficiently smaller than the inner diameter of the lower half portion 10, and a bulging portion 33 connected to the lower end of the main body portion 32, The bulging portion 33 has a rugby ball shape, and is in a free state (that is, as shown in FIG. 1).
In the state where the operation button portion 28 is not pressed), the cylindrical body 12 is pressed against the circumferential notch 22 of the lower half 10 of the cylindrical body 12 and slightly elastically deformed, thereby opening the lower opening of the lower half 10 of the cylindrical body 12. Is covered. Further, since the rod-shaped portion 29 is loosely inserted into the lower half portion 10 of the cylindrical body 12, an air passage between the outer peripheral surface of the rod-shaped portion 29 and the inner peripheral surface of the lower half portion 10 is provided. A gap 19 is formed. That is,
In the state shown in FIG. 1, the opening S of the cylindrical portion 7 and the port 8 are not in communication with each other, and the communication hole 20 and the suction hole
27 is in communication with the above through the gap 19.

Then, as shown in FIG.
28, the upper half 11 and the lower half
10 is blocked, and the bulging portion of the rod-shaped portion 29 is
33 is separated from the circumferential cutout 22 of the tubular body 12, and the covered state is released. When the cover is released, the lower half portion 10 of the tubular body 12 and the opening S of the tubular portion 7 are in communication with each other, and the suction channel communicates with the port 8 and the suction source. State.

In this endoscope, as shown in FIG. 3, a branch pipe 36 protrudes from the proximal end grip 1 so that, for example, forceps or a laser fiber can be inserted thereinto. It can be used to inject chemicals such as anesthetics.

Next, a method of using an endoscope provided with the suction operation unit structure configured as described above will be described. While grasping the proximal end grip 1, the insertion section 2 is sequentially inserted into the body while being swung, to observe an affected part or the like, or to press-in a drug solution such as an anesthetic solution from a syringe or the like attached to the branch pipe 36. . At this time, a suction device (suction source) is connected to the port portion 8, and during this observation or treatment, air enters the cylindrical body 12 through the air suction hole 27 as shown by the arrow B in FIG. Communication hole
From 20 is discharged to the suction device. In other words, a state in which air inflow noise is generated when air enters the air suction hole 27 (non-suction state). Then, when it is desired to discharge a body fluid, a drug solution, or the like to the outside, the operation button unit 28 is pressed as shown by an arrow A in FIG. 2 to bring the state shown in FIG. As a result, the upper half 11 and the lower half 10 of the tubular body 12 are shut off, and the port 8 and the suction channel are in communication with each other, so that air flows as shown by the arrow C in FIG. The suction channel is in a suction state, so that a body fluid, a drug solution, or the like can be sucked and discharged to the outside.

When the operation button 28 is released from the suction state, the upper half 11 of the tubular body 12 returns to the state shown in FIG. 1 by its restoring force, and returns to the above-mentioned non-suction state. That is, it is usually in a non-suction state, and only when it is desired to suck body fluids, etc.
What is necessary is just to press the operation button part 28, and the switching operation between the suction state and the non-suction state can be easily performed. Moreover, since the cylindrical body 12 is made of an elastic material, it can be easily disassembled and assembled.

The elastic material used for the cylindrical body 12 can be, for example, natural rubber or synthetic rubber (chloroprene rubber, silicon rubber, or the like). ), When the operating member 13 is pushed up to cover the lower opening of the lower half portion 10 of the tubular body 12 with the bulging portion 33, and after pressing the operating button portion 28, the pressing is released. In addition, any material having elasticity capable of returning to the state of FIG. 1 by the restoring force may be used.

The diameter and number of the communication hole 20 and the air suction hole 27 provided in the cylindrical body 12 can be freely set. In the case of the air suction hole 27, the operation button 28 is pressed. It is necessary to deform the upper half portion 11 of the cylindrical body 12 into a flat shape substantially uniformly.Therefore, it is preferable to arrange a plurality of the air suction holes 27 at a constant pitch in the circumferential direction. If the hole diameter is small, the air inflow noise becomes too loud or the air inflow does not work well, and if the hole diameter is too large or the number is too large (depending on the material used). Due to the weight of the operating member 13 in the free state, there is a possibility that the upper half portion 11 of the tubular body 12 may be flattened as shown in FIG. Therefore, it is necessary to determine the hole diameter and the number of the air suction holes 27 in consideration of the material, shape, and the like of the cylindrical body 12.

[0029]

Since the present invention is configured as described above, the following effects can be obtained.

The switching between the non-sucking state and the sucking state can be reliably performed by a simple operation, and the total number of parts is small, so that disassembly and assembly can be easily performed. For this reason, each component can be easily and reliably cleaned. Further, the return of the operation button section 28 utilizes the elasticity of the cylindrical body 12, so that small parts such as O-rings and springs are not used, and when disassembling at the time of washing, etc. There is no worry about loss.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a suction operation unit structure according to the present invention.

FIG. 2 is a sectional view of an operation state of a suction operation unit structure.

FIG. 3 is an overall view of an endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base end grip 2 Internal insertion part 7 Cylindrical part 8 Port part 9 Casing 10 Lower half part 11 Upper half part 12 Cylindrical body 20 Communication hole 27 Air suction hole 28 Operation button part 29 Rod part 33 Swelling part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 1/00-1/32 G02B 23/24

Claims (1)

(57) [Claims] 1. A suction operation part structure provided on a proximal grip of an endoscope having a proximal grip and an internal insertion part protruding from the proximal grip, wherein suction inside the internal insertion part is provided. A casing having a tubular portion having an opening portion connected to the channel and having a port portion connected to the suction source, and a lower half portion fitted to the tubular portion of the casing so as to be able to be fitted and removed. The upper half can be flattened
The upper half portion has an air suction hole that communicates with the outside and the lower half portion has a communication hole that communicates with the port portion of the casing, and the upper half portion has an upper half portion.
And a tubular body made of an elastic material having a lower half integrally formed ,
The upper portion of the cylindrical body is detachably engaged with the upper opening to cover the upper opening and is pushed up by the cylindrical body in a free state to communicate with the air suction hole. The lower half and the upper half are shut off while the upper opening is closed by pressing down the upper half of the cylindrical body due to the elastic deformation of the cylindrical body into the flat shape while making the hole communicate with the hole. An operation button portion, which is integrally connected to the operation button portion, and is loosely inserted into the lower half of the cylindrical body so that the lower bulge portion of the cylindrical body is free when the cylindrical body is in a free state. The lower opening of the lower half is covered to make the communication hole and the opening of the cylindrical portion in a non-communicating state, and the cover of the lower bulging portion is released by pressing down the operating portion. And a rod-shaped portion for making said communication hole and the opening communicate with each other.