JP3825752B2 - Endoscope pipe switching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope conduit switching device.
[0002]
[Prior art]
In the endoscope, an operation device for performing air supply / water supply and suction operations is arranged in an operation unit.
[0006]
[Problems to be solved by the invention]
[0008]
However, the conventional ones apparatus Ri Do complex and costly, also had complete cleaning also difficulties Tsu name after use.
[0009]
The present invention is simple and therefore an object of the washing after use at a low cost to provide a conduit switching apparatus easy endoscope.
[0010]
In order to achieve the above object, an endoscope channel switching device according to the present invention includes a channel that opens outward at the distal end of an insertion portion as a plurality of fluid conduits that are piped to an endoscope, and an external feeding device. The piston body is inserted into the cylinder body to which the three fluid conduits of the air supply pipe connected to the air device and the suction pipe connected to the suction device are connected, so that the piston body can be moved back and forth in the axial direction. By performing the push-in operation, the connection relationship between the air supply pipe and the suction pipe with respect to the channel that opens outward at the distal end of the insertion portion is switched between the predetermined intermediate push position and the maximum push position of the movement range of the piston body. In the endoscope channel switching device, the elastic member for returning the piston body from the pushed-in state to the standby state has a hollow 8-shaped cross-sectional shape from the thickness of the half on the head side. Base half meat It is formed in a thin shape, the elastic member shaped cross section of the hollow 8 along with the piston body is pressed is squashed in the vertical direction, the thin base of the wall thickness of the two halves The position when the side half is completely crushed is made to coincide with the predetermined intermediate pushing position.
[0011]
In addition, it is good that the vent hole which connects the inside of an elastic member and the exterior is formed in the outer wall part of an elastic member, In that case, a vent hole is a thick head of two half parts of an elastic member. It should be formed in the side half, and when the head side half is completely crushed, an air passage between the two halves is formed between the two halves. It is good to have.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 5 shows an endoscope used for gastrointestinal tract examinations such as the stomach, wherein 2 is an operation part, and 3 is an insertion part made of a flexible tube. A distal end main body 5 incorporating an objective optical system and the like is connected to the distal end of the insertion portion 3.
[0013]
The operation unit 2 is provided with an air supply / suction switching operation valve 40 on the front side, and an eyepiece unit 8 projects from the upper end. A connector (not shown) that is detachably connected to the light source device is attached to the distal end of the coupling flexible tube 9 that is coupled to the operation unit 2.
[0014]
An air supply / suction / forceps channel 6 (hereinafter simply referred to as “channel 6”) that opens outward from the distal end body 5 is inserted into the insertion portion 3 from the operation portion 2.
[0015]
The base end side of the channel 6 is connected in communication with the bottom of the air / suction switching operation valve 40. Further, an external air supply device (not shown) and an air supply tube 11 and a suction tube 12 connected to the suction device are connected to the side surface of the air supply / suction switching operation valve 40 through the connecting flexible tube 9. Yes.
[0016]
FIG. 1 shows a standby state of the air supply / suction switching operation valve 40, in which a cylinder body 41 is provided in the operation unit 2, and its mouth opens to the outside of the operation unit 2. The channel 6 is connected to the central axis position at the bottom of the cylinder body 41, and the air supply pipe 11 and the suction pipe 12 are connected to the side surface of the cylinder body 41. In addition, a leak hole 42 communicating with the atmosphere is formed in the side surface of the cylinder body 41.
[0017]
A metal or plastic piston body 43 is fitted and inserted into the cylinder body 41 so as to be able to advance and retreat in the axial direction. A shaft hole 45 (passage) extending through the entire length penetrates the axial position of the piston body 43. It has been drilled.
[0018]
A wide communication groove 46 that communicates with the air supply pipe 11, the suction pipe 12, and the leak hole 42 is formed on the outer circumferential surface of the piston body 43 on the circumferential surface. A narrow circumferential groove 47 is formed on the proximal side (mouth side) from the communication groove 46, and the communication hole 48 communicates the circumferential groove 47 and the shaft hole 45. O-rings for sealing are mounted on the outer periphery of the piston body 43 before and after the grooves 46 and 47, respectively.
[0019]
The head of the piston body 43 protrudes outward from the mouth of the cylinder body 41, and an elastic operation button 50 (elastic member) made of, for example, rubber is attached to the protruding end of the protruding portion.
[0020]
The projecting end side of the operation button 50 is detachably attached to a flange-like portion 43 a projecting from the projecting end portion of the piston body 43, and the base portion of the operation button 50 is a flange projecting from the mouth of the cylinder body 41. It is detachably attached to the shape part 41a.
[0021]
The operation button 50 is formed in a hollow 8-shaped cross-sectional shape, and an air passage 51 for communicating the upper and lower chambers is formed between the piston body 43 and an intermediate portion thereof.
[0022]
The operation button 50 is formed so that the thickness of the base side half 50a near the cylinder body 41 is thinner than the thickness of the head side half 50b. Therefore, when the operation button 50 is pushed with the fingertip from the protruding end side in the direction in which the piston body 43 is pushed into the cylinder body 41, the base side half 50a is first crushed as shown in FIG. As shown in FIG. 3, the head-side half 50b is crushed.
[0023]
When the pushing force of the fingertip is loosened, the elasticity of the operation button 50 first restores the head-side half 50b as shown in FIG. 2, and then the base-side half 50a as shown in FIG. Restore.
[0024]
Reference numeral 52 denotes a vent hole formed in the outer wall surface of the head-side half 50b in order to allow the air in the operation button 50 to be taken in and out during such an operation. Reference numeral 53 denotes a ventilation groove 53 for taking in and out air between the head-side half 50b and the base-side half 50a when the head-side half 50b is crushed as shown in FIG. is there.
[0025]
A finger rest 54 for applying an operation finger is formed at the protruding end portion of the operation button 50, and in the center thereof is a “−” shape that is normally closed and opened when the treatment instrument 100 is inserted. A slit is formed, and that portion is a so-called forceps plug.
[0026]
In the embodiment apparatus thus formed, in the standby state, as shown in FIG. 1, the air fed into the cylinder body 41 from the air feeding pipe 11 is sucked into the suction pipe 12 through the communication groove 46. Then, the difference air between the air supply amount and the suction amount is sent out or sucked in from the leak hole 42.
[0027]
Then, as shown in FIG. 2, when the piston body 43 is pushed to the position where the proximal half 50a of the operation button 50 is completely crushed with the fingertip applied to the finger pad 54, the circumferential groove 47 is formed in the air pipe. 11, the air supply pipe 11 communicates with the shaft hole 45 through the circumferential groove 47 and the communication hole 48, and further air is supplied from the air supply pipe 11 to the distal end of the insertion section through the channel 6. Air is sucked into the suction pipe 12 through the leak hole 42 and the communication groove 46.
[0028]
As shown in FIG. 3, when the piston body 43 is pushed in until the operation button 50 is completely crushed, the circumferential groove 47 faces the opening of the suction pipe 12 and the circumferential groove 47 and the communication hole 48 are interposed. Thus, the suction tube 12 communicates with the shaft hole 45, and suction is performed from the distal end of the insertion portion to the suction tube 12 through the channel 6. The air sent into the cylinder body 41 from the air supply pipe 11 is released to the atmosphere through the ventilation path 51, the ventilation groove 53 and the ventilation hole 52.
[0029]
As shown in FIG. 4, when the treatment tool 100 is inserted from the outside into the slit of the forceps plug 55 in the standby state, the treatment tool 100 pushes the slit open to form the shaft hole 45 formed in the piston body 43. It is guided into the channel 6 through the inside and protrudes from the opening at the distal end of the insertion portion.
[0030]
Further, after the end of the endoscopy, the operation button 50 is removed from the cylinder body 41 and the piston body 43, the piston body 43 is extracted from the cylinder body 41, and the inside of the cylinder body 41, the piston body 43, the forceps plug 55, etc. are simultaneously attached. Easy to clean.
[0031]
【The invention's effect】
According to the pipe switching device of an endoscope of the present invention, also washing Yogo used at low cost in inch simple it can be Rukoto facilitate construction.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embodiment in a standby state.
FIG. 2 is a longitudinal sectional view of an air supply state according to the embodiment.
FIG. 3 is a longitudinal sectional view of the suction state of the embodiment.
FIG. 4 is a longitudinal sectional view of the treatment instrument in use according to the embodiment.
FIG. 5 is a side view of the endoscope according to the embodiment.
[Explanation of symbols]
6 channel 11 air supply pipe 12 suction pipe 41 cylinder body 43 piston body

Claims (4)

Three fluids: a channel that opens outward at the distal end of the insertion portion as a plurality of fluid pipes piped to the endoscope, an air supply pipe connected to an external air supply apparatus, and a suction pipe connected to the suction apparatus The piston body is inserted into the cylinder body to which the pipe line is connected so as to be able to advance and retreat in the axial direction, and the piston body is pushed from the standby state. In the endoscope channel switching device configured to switch the connection relationship between the air supply tube and the suction tube with respect to the channel that opens outward at the distal end of the insertion portion at the pushing position,
The elastic member for returning the piston body from the pushed-in state to the standby state has a hollow 8-shaped cross-sectional shape and is thicker at the base side half than at the head side half. Is formed into a thin shape, and as the piston body is pushed in, the hollow 8-shaped elastic member having a cross-sectional shape is crushed in the vertical direction, and the thickness of the two halves is thin. An endoscope pipe switching device characterized in that a position when a base half is completely crushed is matched with the predetermined intermediate pushing position. 2. The endoscope channel switching device according to claim 1, wherein a vent hole communicating the inside and outside of the elastic member is formed in an outer wall portion of the elastic member. 3. The endoscope channel switching device according to claim 2, wherein the vent hole is formed in a thicker head half of the two halves of the elastic member. 4. The air passage according to claim 3, wherein an air passage for taking in and out air between the two halves when the head half is completely crushed is formed between the two halves. Endoscope switching device.

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