JP2010268866A - Air feed, liquid feed suction device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air feed, liquid feed suction device for an endoscope which has an increased air feed rate per unit time and is capable of properly washing an objective lens. <P>SOLUTION: Air flowing into a first air feed, liquid feed cylinder 120 from a first air flowing inlet 123 flows into a leak tube 133 via a space near a bottom part 128 of the first air feed liquid feed cylinder 120 because there is a gap between the first air feed, liquid feed cylinder 120 and the first air flowing inlet 123. The air pressure in the leak tube 133 is raised because a leak hole 145 is closed. A first check valve 140 deforms due to the rise of the air pressure and thus air flows into a second air flowing inlet 163 from the leak tube 133 via a first air flowing outlet tubular path 225. Air is fed to the space near the bottom part 128 of a suction cylinder 160 from the second air flowing inlet 163. Thereafter, the air is discharged from a suction port via a negative pressure inlet 165 and a suction tubular path 241. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is an endoscope that is provided inside an endoscope, sends out gas and liquid from the distal end portion of the endoscope, and sucks and discharges an object near the distal end portion from the body of the subject. The present invention relates to an air / liquid feeding / suction device.

  Endoscope is a water supply pipe that sends out liquid for cleaning the objective lens and observation object, an air supply pipe that sends gas to the organ to be observed or blows away foreign substances attached to the objective lens There is known one having a suction pipe for sucking a foreign object or the like attached to a path and an observation object or inserting forceps (Patent Document 1). In such an endoscope, a nozzle is attached to the distal end in order to properly clean the objective lens. Further, the cross-sectional areas of the water supply pipe and the air supply pipe are smaller than the cross-sectional area of the suction pipe.

  When three pipes are provided, the diameter of the insertion portion of the endoscope becomes thick and the load applied to the subject increases, so attempts have been made to share the pipes (Patent Documents 2 and 3).

Japanese Patent No. 3678614 Japanese Patent Publication No. 01-057577 JP 05-228103 A

  In a conventional endoscope having three conduits, if the diameter of the insertion portion of the endoscope is to be reduced, the cross-sectional areas of the water supply conduit and the air supply conduit must be reduced. When the cross-sectional areas of these pipe lines are reduced, the amount of gas that can be supplied at a time is reduced. For this reason, the time required to inflate the organ for observation becomes longer, and the load on the subject increases.

  Furthermore, when a common pipe line is used, if a nozzle is attached to the distal end portion in order to properly clean the objective lens, foreign matter adhering to the observation target cannot be properly inhaled. On the other hand, if the nozzle is omitted, the objective lens cannot be cleaned properly.

  The present invention has been made in view of these problems, and obtains an endoscopic air-feeding / feeding / suctioning apparatus that has a large amount of air-feeding per unit time and can appropriately clean an objective lens. For the purpose.

  An endoscope air-feed / suction device according to the present invention includes a gas inflow conduit through which gas flows in, a gas outflow conduit through which gas flows out, a liquid inflow conduit through which liquid flows, and a liquid through which liquid flows out. An air / liquid feeding member connected to the outflow pipe and a suction pipe connected to a suction port provided at the distal end of the endoscope are connected, and the gas outflow pipe is supplied and fed A suction member directly connected from the liquid member, and the liquid outflow pipe is connected to a liquid feeding port provided at a distal end portion of the endoscope. The gas that is larger than the cross-sectional area of the outflow pipe, the liquid outflow pipe, and the liquid supply port and that flows into the air supply / liquid supply member through the gas inflow pipe directly flows into the suction member through the gas outflow pipe The liquid that has flowed out of the suction port through the suction pipe and that has flowed into the air / liquid feeding member through the liquid inflow pipe Characterized in that it flows out from the liquid feed port through the road.

  It is preferable that the gas outflow pipe not connected to the suction member is connected to the liquid feeding port after being connected to the liquid outflow pipe.

  A plurality of gas outflow pipes are connected to the air supply / liquid supply member, one of the plurality of gas outflow pipes is connected to the suction member, and a gas outflow pipe not connected to the suction member is connected to the distal end of the endoscope. It is preferable to be directly connected to the liquid feeding port provided at the end.

  The air / liquid feeding member has a leak hole connected to the gas inflow conduit and first to third air / liquid feeding operation positions, and the air / liquid feeding member is located at the first air / liquid feeding operation position. In some cases, when the leak hole is sealed, it is preferable that the gas flowing into the air / liquid feeding member from the gas inflow pipe is led to the liquid feeding port via the gas outflow pipe not connected to the suction member. .

  The air / liquid feeding member has first to third air / liquid feeding operation positions, and when the air / liquid feeding member is in the second air / liquid feeding operation position, air is fed via the gas inflow conduit. The gas that has flowed into the liquid feeding member may directly flow into the suction member via the gas outflow pipe and be guided to the suction port via the suction pipe.

  The suction member has first and second suction operation positions, and when the suction member is in the first suction operation position, the gas directly flowing into the suction member from the air / liquid feeding member via the gas outflow conduit is Alternatively, it may be configured to be guided to the suction port via the suction pipe.

  At this time, the suction member is connected to the negative pressure line to which negative pressure is applied, and has first and second suction operation positions. When the suction member is in the second suction operation position, the suction pipe It is preferable that the path and the negative pressure line are connected.

  The air / liquid feeding member has first to third air / liquid feeding operation positions, and when the air / liquid feeding member is in the third air / liquid feeding operation position, air is fed via the liquid inflow conduit. The liquid flowing into the liquid feeding member may be directly guided to the liquid feeding port via the liquid outflow conduit.

  The air / liquid feeding member can be moved linearly by the user's pressing, and is placed in the first air / liquid feeding operation position when not operated, and the second air / liquid feeding operation position when half-pressed. It is preferably placed at the third air / liquid feeding operation position when fully depressed.

  The air / liquid feeding member can be moved linearly by the user's pressing, and is placed in the first air / liquid feeding operation position when not operated, and the third air / liquid feeding operation position when half-pressed. It may be configured to be placed at the second air / liquid feeding operation position when fully depressed.

  The suction member can be moved linearly by a user's pressing, and is preferably placed at the first suction operation position when not operated and placed at the second suction operation position when fully pressed.

  The air / liquid feeding member preferably includes a gas / liquid seal member that prevents connection with the gas inflow conduit, the gas outflow conduit, the liquid inflow conduit, and the liquid outflow conduit.

  The gas-liquid seal member is preferably an O-ring.

  It is preferable that the air / liquid feeding member further includes a check valve that controls so that the gas flowing in from the gas inflow conduit flows into only one of the plurality of gas outflow conduits.

  The suction member may include a suction seal member that prevents connection between the gas outflow conduit and the negative pressure conduit.

  The suction seal member is preferably an O-ring.

  It is preferable that a forceps port for inserting forceps or injecting a drug is connected to the suction pipe.

  According to the present invention, an insufflation / feeding / suctioning device for an endoscope is obtained that has a large amount of insufflation per unit time and can appropriately clean an objective lens.

It is the figure which showed schematically the cross section of the endoscope which has the 1st endoscope air supply / liquid feeding suction apparatus by 1st Embodiment. It is sectional drawing which showed the 1st air / liquid feeding member in the 1st air / liquid feeding operation position. It is sectional drawing of the 1st air / liquid feeding member in the III-III line of FIG. It is sectional drawing which showed the 1st air supply / liquid supply member in a 2nd air supply / liquid supply operation position, and the suction member in a 1st suction operation position. It is sectional drawing which showed the 1st air / liquid feeding member in a 3rd air / liquid feeding operation position. It is sectional drawing which showed the suction member in a 2nd suction operation position. It is the figure which showed schematically the cross section of the endoscope which has the 2nd endoscope air supply / liquid feeding / suction apparatus by 2nd Embodiment. It is sectional drawing which showed the 2nd air / liquid feeding member in a 1st air / liquid feeding operation position. It is sectional drawing which showed the 2nd air / liquid feeding member in a 2nd air / liquid feeding operation position. It is sectional drawing which showed the 2nd air supply / liquid supply member in a 3rd air supply / liquid supply operation position, and the suction member in a 1st suction operation position. It is sectional drawing of the 1st air / liquid feeding member in the XI-XI line of FIG. It is the figure which showed schematically the cross section of the endoscope which has the 3rd endoscope air supply / feeding liquid suction apparatus by 3rd Embodiment. It is sectional drawing which showed the 3rd air supply / liquid supply member in a 1st air supply / liquid supply operation position, and the suction member in a 1st suction operation position. It is sectional drawing which showed the 3rd air supply / liquid supply member in a 3rd air supply / liquid supply operation position, and the suction member in a 1st suction operation position. It is sectional drawing which showed the 3rd air supply / liquid supply member in a 1st air supply / liquid supply operation position, and the suction member in a 2nd suction operation position.

  Hereinafter, an endoscopic air-feeding / suctioning device according to the present invention will be described with reference to the accompanying drawings.

  The configuration of the first endoscope air / fluid feeding / suction device 100 according to the first embodiment will be described with reference to FIGS. 1 to 4.

  The first endoscope air / liquid feeding / suction device 100 is stored in the first endoscope 200. The first endoscope 200 includes a connector unit 210 connected to an endoscope processor (not shown), a first operation unit 220 held by a user during use, a connector unit 210, and a first operation unit 220. Are connected to each other, and a universal cable portion 230 for connecting the first and second operation portions 220 and an insertion portion 240 inserted into the body of the subject.

  The connector unit 210 includes an air supply port 211, a water supply port 212, and a negative pressure supply port 213. An air supply / water supply connector extending from an air supply / water supply tank is connected to the air supply port 211 and the water supply port 212, and air is supplied to the air supply port 211 and water is supplied to the water supply port 212. These air and water are pressurized to a predetermined pressure. The negative pressure supply port 213 is connected to a negative pressure connector extending from the negative pressure pump to apply a negative pressure. The air supply / water supply tank, the air supply / water supply connector, the negative pressure pump, and the negative pressure connector are not shown.

  A gas inflow conduit 231, a liquid inflow conduit 232, and a negative pressure conduit 233 that extend to the first operation unit 220 through the inside of the connector and the universal cable 230 are an air supply port 211, a water supply port 212, and a negative pressure supply port 213. Are respectively connected to the inner ends of the connectors.

  The distal end portion 246 of the insertion portion 240 is provided with an objective lens and an illumination lens (not shown), a suction port 245, and an air / liquid feeding port 243 that is a liquid feeding port. A suction line 241 extending from the first operation unit 220 is connected to the suction port 245, and a liquid outflow line 242 and a second gas outflow line 221 extending from the first operation unit 220 are connected to the air supply / liquid supply port 243. Connected. A nozzle 244 is attached to the air / liquid feeding port 243 so that water and air can be ejected toward the objective lens.

  The first operation unit 220 includes a forceps insertion port 222 for inserting forceps or injecting medicine, a first air / fluid feeding member 110, and a suction member 150. A forceps conduit 223 branched from the suction conduit 241 is connected to the forceps insertion port 222. A forceps plug 224 having a slit is attached to the forceps insertion port 222 so that gas, liquid, foreign matter and the like flowing through the forceps conduit 223 do not flow out of the forceps insertion port 222. When a user inserts forceps or the like to collect foreign matter or the like and performs a treatment such as excision, the slit of the forceps plug 224 is expanded to insert the forceps or the like into the forceps insertion port 222.

  The first air / liquid feeding member 110 and the suction member 150 mainly constitute the first air / liquid feeding / suctioning device 100 for an endoscope.

  The first air / liquid feeding member 110 includes a cylindrical first gas-feeding / liquid-feeding cylinder 120 having a bottomed shape and a columnar first gas inserted into the inner peripheral surface 121 of the first air-feeding / liquid-feeding cylinder 120. And an air / liquid feeding piston 130. The first air / liquid supply piston 130 is inserted so as to be coaxial with the first air / liquid supply cylinder 120.

  The first air / liquid feeding cylinder 120 is attached to a hole provided in the exterior 226 of the first operation unit 220 and opens to the outside of the first operation unit 220.

  The first air / liquid feeding cylinder 120 includes a first gas inlet 123, a first gas outlet 124, and a first gas penetrating from the inner peripheral surface 121 to the outer surface 122 of the first air / liquid feeding cylinder 120. Two gas outlets 125, a liquid inlet 126, and a liquid outlet 127. In the direction of the axis X of the first air / liquid feeding cylinder 120, the respective inflow / outflow ports are provided at different positions. More specifically, the first gas inlet 123, the first gas outlet 124, the second gas outlet 125, the liquid from the bottom 128 of the first air / liquid feeding cylinder 120 toward the opening 129. An inlet 126 and a liquid outlet 127 are attached in this order.

  The diameter of the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 at the joint between the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 and the first gas inflow port 123 is such that each inflow / outflow port has a different diameter. It is slightly larger than the diameter at the part that is not provided. The diameter of the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 at the joint between the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 and the liquid inlet 126 is provided for each inflow / outlet port. It is slightly larger than the diameter at the part that cannot be obtained.

  A gas inflow conduit 231 is provided at the first gas inlet 123, a first gas outlet conduit 225 is provided at the first gas outlet 124, and a second gas outlet conduit 221 is provided at the second gas outlet 125. The liquid inlet 126 is connected to the liquid inlet 126, and the liquid outlet 242 is connected to the liquid outlet 127, respectively.

  The second gas outflow line 221 is connected to the liquid outflow line 242 inside the first operation unit 220. Note that the second gas outflow pipe 221 may be directly connected to the air supply port without being connected to the liquid outflow pipe 242 inside the first operation unit 220.

  In the first air / liquid feeding piston 130, the end facing the bottom portion 128 of the first air / liquid feeding cylinder 120 is the tip 131, and the end of the first air / liquid feeding cylinder 120 on the opening 129 side. Is the pressing end 132.

  The first air / liquid feeding piston 130 includes a cylindrical leak pipe 133 that penetrates the entire length in the axial direction, and first, second, and third portions formed on the outer circumferential surface over the entire circumference in the circumferential direction. Recesses 134, 135, and 136 are provided. The first to third recesses 134 to 136 have a depth in the radial direction of the first air / liquid feeding piston 130 and have a width in the axial direction. The first to third recesses 134 to 136 are different in depth and width. Cross sections of the first to third recesses 134-136 in a plane passing through the axis X of the first air / liquid feeding piston 130 are U-shaped or inverted U-shaped, and are symmetrical with respect to the axis X. is there.

  From the distal end portion 131 toward the pressing end portion 132, there are two first concave portions 134, one third concave portion 136, four first concave portions 134, one second concave portion 135, and first One recess 134 is provided.

  In the first to third recesses 134 to 136, a curved surface parallel to the axis X of the first air / fluid feeding piston 130 is used as a bottom surface, and is perpendicular to the axis X of the first air / fluid feeding piston 130. The plane located on the bottom 128 side of the first air / fluid feeding cylinder 120 is the lower side surface, and the plane located on the opening 129 side of the first air / fluid feeding cylinder 120 is the upper side surface. .

  An O-ring 137 is attached to the first recess 134 having the smallest depth and width. The O-ring 137 slightly protrudes from the outer surface 138 of the first air / liquid feeding piston 130 in the radial direction. Nothing is attached to the second recess 135 having the same depth as the first recess 134 and a wide width.

  The third recess 136 has a greater depth and width than the first recess 134 and a smaller width than the second recess 135. A first through hole 139 that penetrates to the leak pipe 133 is opened at the bottom surface of the third recess 136. The first through hole 139 is a cylindrical hole whose axis is a straight line perpendicular to the axis X of the first air / liquid feeding piston 130. The flow of gas that passes from the leak pipe 133 toward the third recess 136 is slightly resistant, and the flow of gas that passes from the third recess 136 toward the first through hole 139 is sealed. A first check valve 140 is attached to the bottom surface of the third recess 136.

  The first check valve 140 is made of an annular elastic member. The axis of the first check valve 140 coincides with the axis X of the first air / liquid feeding piston 130. The cross section passing through the axis X of the first check valve 140 has a V shape in which the central portion in the axial direction protrudes toward the inner peripheral side. The outer peripheral side end of the first check valve 140 engages with the upper side surface and the lower side surface of the third recess 136. When the pressure applied from the leak pipe 133 side exceeds the elastic force of the first check valve 140, the first check valve 140 is deformed and the pressure is increased in the outer circumferential direction of the first air / liquid feeding piston 130. Let it go. When the pressure applied from the leak pipe 133 does not exceed the elastic force of the first check valve 140, the first check valve 140 does not release the pressure in the outer circumferential direction of the first air / liquid feeding piston 130. . When pressure is applied from the outer peripheral side of the first air / liquid feeding piston 130, the first check valve 140 comes into close contact with the upper side surface and the lower side surface of the third recess 136 and releases the pressure to the leak pipe 133 side. Absent.

  One end of the first air / liquid feeding piston 130 protrudes from the opening 129 of the first air / liquid feeding cylinder 120, and the first pressing portion 141 is attached thereto.

  The first pressing part 141 includes a first pressing button 142, a second pressing button 143, and a first base part 144.

  The first base 144 is fixed to the exterior 226 of the first operation unit 220 and the first air / liquid feeding cylinder 120.

  The first push button 142 is a cylinder, and a leak hole 145 passes through the center thereof. The first push button 142 is attached to the first air / liquid feeding piston 130 so that the leak hole 145 and the leak pipe 133 are coaxially connected.

  A first coil compression spring 146 is provided between the first push button 142 and the first base 144. The first coil compression spring 146 holds the first press button 142 at the position that protrudes most from the first operation unit 220 when the user does not operate the first press button 142. At this time, the first air / liquid feeding piston 130 is in the first air / liquid feeding operation position where it is inserted most shallowly into the first air / liquid feeding cylinder 120.

  When the first gas / liquid feeding piston 130 is in the first gas / liquid feeding operation position, the first gas inlet 123 and the first gas / liquid feeding piston 130 are the first gas / liquid feeding cylinder. The second gas outlet 125 and a part of the third recess 136 overlap in the radial direction of the first air / liquid feeding cylinder 120 without overlapping in the radial direction of 120. The O-ring 137 attached to the first recess 134 located on both sides of the third recess 136 in the axial direction of the first air / liquid supply cylinder 120 is connected to the first air / liquid supply piston 130 and the first air supply / liquid supply piston 130. Therefore, the space formed by the connection between the first gas inlet 123 and the first gas outlet 124 is sealed.

  The second pressing button 143 has a cylindrical shape having an inner diameter larger than the outer diameter of the first pressing button 142, and the inner periphery is fitted with the outer periphery of the first pressing button 142 while ensuring a slight play. .

  A second coil compression spring 147 is provided between the second push button 143 and the first base 144. The second coil compression spring 147 holds the second press button 143 at the position most protruded from the first operation unit 220 when the user does not operate the second press button 143. The spring constant of the second coil compression spring 147 is larger than the spring constant of the first coil compression spring 146.

  When the user presses the first press button 142 with a finger in the axial direction of the first air / liquid supply piston 130, the finger contacts the second press button 143. At this time, since the spring constant of the second coil compression spring 147 is larger than the spring constant of the first coil compression spring 146, the user feels resistance and easily stops the operation of pushing the first push button 142. can do. This state is referred to as a half-pressed state, and the first air / liquid feeding piston 130 is placed at the second air / liquid feeding operation position. When the first gas / liquid feeding piston 130 is in the second gas / liquid feeding operation position, the first gas inlet 123 and the first gas / liquid feeding piston 130 are connected to the first gas / liquid feeding cylinder. The first gas outlet 124 and a part of the third recess 136 overlap in the radial direction of the first air / liquid feeding cylinder 120. The O-ring 137 attached to the first recess 134 located on both sides of the third recess 136 in the axial direction of the first air / liquid supply cylinder 120 is connected to the first air / liquid supply piston 130 and the first air supply / liquid supply piston 130. Therefore, the space formed by the connection between the first gas inlet 123 and the first gas outlet 124 is sealed.

  Further, when the user presses the first press button 142, the first press button 142 and the second press button 143 are completely pressed. In this state, the first air / liquid feeding piston 130 is placed at the third air / liquid feeding operation position most inserted in the first air / liquid feeding cylinder 120. This state is called a fully pressed state. When the first gas / liquid feeding piston 130 is in the third gas / liquid feeding operation position, the liquid inlet 126 and a part of the second recess 135 are in the radial direction of the first gas / liquid feeding cylinder 120. The liquid outlet 127 and a part of the second recess 135 overlap in the radial direction of the first air / liquid feeding cylinder 120. Thereby, the liquid inlet 126 and the liquid outlet 127 are physically connected. Then, since the O-ring 137 attached to the first recess 134 seals between the first air / liquid feeding piston 130 and the first air / liquid feeding cylinder 120, the liquid inlet 126 and the liquid outlet are provided. The space formed by the connection with 127 is sealed.

  The suction member 150 includes a bottomed cylindrical suction cylinder 160 and a columnar suction piston 170 inserted into the inner peripheral surface 161 of the suction cylinder 160.

  The suction cylinder 160 is attached to a hole provided in the exterior 226 of the first operation unit 220 and opens to the outside of the first operation unit 220.

  The suction cylinder 160 has a second gas inlet 163 and a negative pressure outlet 164 that penetrate from the inner peripheral surface 161 to the outer side surface 162 of the suction cylinder 160, and a negative pressure inlet 165 provided at the bottom 166. In the axial direction of the suction cylinder 160, the second gas inlet 163 and the negative pressure outlet 164 are provided at different positions. More specifically, a second gas inlet 163 and a negative pressure outlet 164 are sequentially provided from the bottom 166 of the suction cylinder 160 toward the opening 167.

  The diameter of the inner peripheral surface 161 of the suction cylinder 160 at the joint between the inner peripheral surface 161 of the suction cylinder 160 and the second gas inflow port 163 is slightly larger than the diameter at the portion where the second gas inflow port 163 is not provided. large.

  The second gas inlet 163 is connected directly to the first gas outlet 124 via the first gas outlet line 225, that is, without any branching. A negative pressure line 233 is connected to the negative pressure outlet 164, and a suction line 241 is connected to the negative pressure inlet 165.

  In the suction piston 170, an end facing the bottom 166 of the suction cylinder 160 is a suction tip 171, and an end on the opening 167 side of the suction cylinder 160 is a suction press end 172.

  The suction piston 170 penetrates from the suction tip 171 to substantially the center in the axial direction, and then is bent 90 degrees and opened to the outer periphery of the suction piston 170, and on the outer peripheral surface over the entire circumference. It has the 4th and 5th recessed parts 174 and 175 formed. The fourth and fifth recesses 174 and 175 have a depth in the radial direction of the suction piston 170 and a width in the axial direction. The fourth and fifth recesses 174 and 175 have the same depth but different widths. Cross sections of the fourth and fifth recesses 174 and 175 in a plane passing through the axis Y of the suction piston 170 form a U-shape or an inverted U-shape and are line-symmetric with respect to the axis Y.

  One fourth recess 174 and one fifth recess 175 are provided from the suction tip 171 toward the suction pressing end 172. The opening of the negative pressure introducing tube 173 is provided closer to the suction pressing end 172 than the fifth recess 175.

  The fourth recess 174 has the same shape as that of the first recess 134, and an O-ring 176 is attached thereto. The O-ring 176 slightly protrudes from the outer surface 178 of the suction piston 170 in the radial direction. The fifth recess 175 has a larger width than the fourth recess 174.

  A seal ring 177 made of an annular elastic member is attached around the opening of the negative pressure introducing pipe 173. The seal ring 177 slightly protrudes from the outer periphery of the suction piston 170.

  One end of the suction piston 170 protrudes from the opening 167 of the suction cylinder 160, and the suction pressing part 180 is attached. The suction pressing unit 180 includes a third pressing button 181 and a second base 182. The second base 182 is fixed to the exterior 226 of the first operation unit 220 and the suction cylinder 160. The third push button 181 has a cylindrical shape and is attached to the suction piston 170 so as to be coaxial.

  A third coil compression spring 183 is provided between the third push button 181 and the second base 182. The third coil compression spring 183 holds the third press button 181 at the position that protrudes most from the first operation unit 220 when the user does not operate the third press button 181. At this time, the suction piston 170 is in the first suction operation position where it is inserted into the suction cylinder 160 most shallowly. When the user presses the third push button 181 completely, the suction piston 170 is in the second suction operation position where it is inserted deepest into the suction cylinder 160. At this time, it is said that the suction piston 170 is fully pressed.

  The cross-sectional areas of the suction pipe 241 and the suction port 245 in a plane perpendicular to the extending direction are larger than the cross-sectional areas of the second gas outflow pipe 221, the liquid outflow pipe 242 and the air / liquid feeding port 243. .

  Next, the movement of the first air / liquid feeding member 110 and the suction member 150 will be described with reference to FIGS.

  First, a state where no force is applied to the first air / liquid feeding piston 130 and the suction piston 170 and the leak hole 145 is sealed by the user's finger will be described with reference to FIG.

  At this time, the pressurized air from the gas inflow conduit 231 is supplied to the first air feeding / feeding member 110, and the water pressurized from the liquid inflow conduit 232 is supplied to the first air feeding / feeding member 110. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. Further, since no force is applied to the first air / liquid feeding piston 130 and the suction piston 170, the first air / liquid feeding piston 130 is at the first air / liquid feeding operation position, and the suction piston 170 is at the first position. 1 is placed in the suction operation position.

  When the first air / liquid feeding piston 130 is in the first air / liquid feeding operation position, a space is provided between the tip portion 131 and the bottom portion 128 of the first air / liquid feeding cylinder 120. And the 1st gas inflow port 123 is connected to this space. Therefore, the air supplied to the first air / liquid feeding member 110 from the gas inflow conduit 231 through the first gas inlet 123 flows into the leak pipe 133.

  On the other hand, since the leak hole 145 is blocked, the air pressure in the leak pipe 133 increases. The first check valve 140 closes the first through-hole 139 until the inside of the leak pipe 133 reaches a predetermined air pressure, but when the predetermined pressure is exceeded, the first check valve 140 is deformed and the leak pipe 133 is blocked. And the second gas outlet 125 are physically connected. Then, the air flows out from the leak pipe 133 through the second gas outlet 125 to the second gas outlet pipe 221. Then, air is discharged from the air / liquid feeding port 243.

  On the other hand, an O-ring 137 attached to the first concave portion 134 located on both sides of the third concave portion 136 in the axial direction of the first air / liquid feeding cylinder 120, and the tip of the first air / fluid feeding cylinder 120 Since the O-ring 137 attached to the first recess 134 located on the side of the part 131 seals between the first air / liquid feeding piston 130 and the first air / liquid feeding cylinder 120, the air is No leakage at the inlet / outlet of Similarly, O-rings 137 attached to the first recesses 134 located on both sides of each inflow / outlet in the axial direction of the first air / liquid feeding cylinder 120 are connected to the first air / liquid feeding piston 130 and the first air / liquid feeding piston 130. Therefore, the inflow / outflow ports are not physically connected to each other. That is, air and water do not leak to other inflow / outflow ports.

  Next, FIG. 4 shows a state where the first air / liquid feeding piston 130 is half-pressed by the user, no force is applied to the suction piston 170, and the leak hole 145 is sealed by the user's finger. It explains using.

  At this time, the pressurized air from the gas inflow conduit 231 is supplied to the first air feeding / feeding member 110, and the water pressurized from the liquid inflow conduit 232 is supplied to the first air feeding / feeding member 110. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. The first air / liquid feeding piston 130 is placed at the second air / liquid feeding operation position, and the suction piston 170 is placed at the first suction operation position.

  When the first air / liquid feeding piston 130 is in the second air / liquid feeding operation position, the first gas inflow port 123 and the first air / gas feed are arranged in the radial direction of the first air / liquid feeding cylinder 120. The liquid cylinder 120 overlaps, and the first gas outlet 124 and the third recess 136 overlap in the radial direction of the first air / liquid feeding cylinder 120.

  The diameter of the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 at the joint between the first gas inlet 123 and the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 is such that each inflow / outflow port has a different diameter. Since the diameter is slightly larger than the diameter at the portion not provided, there is a gap between the first air / liquid feeding cylinder 120 and the first gas inlet 123. Therefore, the air that has flowed into the first air / fluid feeding cylinder 120 from the first gas inlet 123 flows between the tip 131 of the first air / fluid feeding piston 130 and the first air / fluid feeding cylinder 120. It flows into the leak pipe 133 through the space formed between the bottom portion 128.

  On the other hand, since the leak hole 145 is blocked, the air pressure in the leak pipe 133 increases. The first check valve 140 closes the first through-hole 139 until the inside of the leak pipe 133 reaches a predetermined air pressure, but when the predetermined pressure is exceeded, the first check valve 140 is deformed and the leak pipe 133 is blocked. And the first gas outlet 124 are physically connected. Then, air flows out from the leak pipe 133 through the first gas outlet 124 to the first gas outlet pipe 225. Then, air flows into the second gas inlet 163.

  When the suction piston 170 is in the first suction operation position, a space is provided between the suction tip 171 and the bottom 166 of the suction cylinder 160. The second gas inlet 163 is connected to this space. Therefore, the air supplied from the first gas outlet line 225 to the first suction member 150 via the second gas inlet 163 flows into the negative pressure inlet 165. Thereafter, air is discharged from the suction port 245 through the suction pipe 241.

  On the other hand, the O-ring 137 attached to the first recess 134 located on both sides of the third recess 136 in the axial direction of the first air / liquid supply cylinder 120 is connected to the first air / liquid supply piston 130 and the first air supply / liquid supply piston 130. Therefore, air does not leak to other inflow / outflow ports. The other inflow / outflow ports are the same as when the first air / liquid feeding piston 130 is in the first air / liquid feeding operation position, and thus the description thereof is omitted.

  Next, a state where the first air / liquid feeding piston 130 is fully pressed by the user will be described with reference to FIG.

  At this time, the pressurized air from the gas inflow conduit 231 is supplied to the first air feeding / feeding member 110, and the water pressurized from the liquid inflow conduit 232 is supplied to the first air feeding / feeding member 110. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. Further, the first air / liquid feeding piston 130 is placed at the third air / liquid feeding operation position.

  When the first gas / liquid feeding piston 130 is in the third gas / liquid feeding operation position, the liquid inlet 126 and a part of the second recess 135 are arranged in the radial direction of the first gas / liquid feeding cylinder 120. And the liquid outlet 127 and the second recess 135 overlap in the radial direction of the first air / liquid feeding cylinder 120.

  The diameter of the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 at the joint between the inner peripheral surface 121 of the first air / fluid feeding cylinder 120 and the liquid inlet 126 is not provided with each inflow / outflow port. Since it is slightly larger than the diameter at the part, there is a gap between the first air / liquid feeding cylinder 120 and the liquid inlet 126. Therefore, the water that has flowed into the first air / liquid feeding cylinder 120 from the liquid inlet 126 flows into the liquid outlet 127 through the second recess 135. Then, water is discharged from the air / liquid supply port 243 through the liquid outflow conduit 242.

  On the other hand, an O-ring 137 attached to the first recess 134 located on both sides of the second recess 135 in the axial direction of the first air / liquid supply cylinder 120 is connected to the first air / liquid supply piston 130 and the first air supply / liquid supply piston 130. Therefore, air does not leak to other inflow / outflow ports. The other inflow / outflow ports are the same as when the first air / liquid feeding piston 130 is in the first air / liquid feeding operation position, and thus the description thereof is omitted.

  Next, a state where the suction piston 170 is in the second suction operation position, that is, a state where the suction piston 170 is fully pressed by the user will be described with reference to FIG. A negative pressure is supplied to the suction member 150 from the negative pressure line 233.

  When the suction piston 170 is in the second suction operation position, the negative pressure outlet 164 and the negative pressure introduction pipe 173 overlap in the radial direction of the suction cylinder 160. Therefore, the negative pressure supplied from the negative pressure line 233 is supplied to the suction line 241 through the negative pressure introduction pipe 173 and the negative pressure inlet 165. Then, a negative pressure is generated at the suction port 245. With this negative pressure, foreign matter in the body of the subject can be sucked from the suction port 245 and taken out from the negative pressure supply port 213 through a path opposite to the negative pressure.

  On the other hand, since the seal ring 177 attached around the opening of the negative pressure introduction pipe 173 seals between the suction piston 170 and the suction cylinder 160, the negative pressure does not leak into the second gas inlet 163. . Thereby, it can prevent that a foreign material flows out into the 2nd gas inflow port 163.

  According to the present embodiment, air can be discharged from the distal end 246 using the suction pipe 241 having a diameter larger than that of the liquid outflow pipe 242, so that the amount of air supplied per unit time can be increased.

  Further, since the liquid outflow pipe 242 and the suction pipe 241 are provided, air can be provided at a low flow rate when the liquid outflow pipe 242 is used, and air can be provided at a high flow rate when the suction pipe 241 is used. Therefore, after supplying a large flow rate first, a small flow rate can be provided to finely adjust the air supply amount. Thereby, the burden on the subject can be reduced.

  Further, since the liquid outflow pipe 242 and the suction pipe 241 are provided, the objective lens can be washed with water and air.

  If a drug is injected from the forceps insertion port while air is flowing through the suction pipe, the same effect as when the spray tube is used can be obtained.

  Next, the configuration of a second endoscope air / liquid feeding / suction device 300 according to the second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The second endoscopic air / liquid feeding / suction device 300 is stored in the second endoscope 400. The second endoscope 400 is different from the first operation unit 220 in the connection state of pipes provided inside the second operation unit 420.

  The second air / liquid feeding member 310 and the suction member 150 mainly constitute the second endoscope air / liquid feeding / suction device 300.

  The second air / liquid feeding member 310 has a bottomed cylindrical second air / liquid feeding cylinder 320 and a columnar second gas inserted into the inner peripheral surface 121 of the second air / liquid feeding cylinder 320. And an air / liquid feeding piston 330.

  The second gas supply / liquid supply cylinder 320 is provided in order from the bottom 128 of the second gas supply / liquid supply cylinder 320 toward the opening 129, a first gas inlet 123, a second gas outlet 125, A liquid inlet 126, a liquid outlet 127, and a first gas outlet 124 are provided.

  The second air / liquid feeding piston 330 includes a cylindrical leak pipe 133 that penetrates the entire length in the axial direction, and first, second, third, and third portions formed on the outer circumferential surface over the entire circumference in the circumferential direction. And sixth recesses 134, 135, 136, and 331. The sixth recess 331 has the same depth as the small width with respect to the first to third recesses 134-136. A cross section of the sixth recess 331 in a plane passing through the axis L of the second air / fluid feeding piston 330 forms a U-shape or an inverted U-shape and is symmetrical with respect to the axis L.

  From the distal end portion 131 toward the pressing end portion 132, there is one first concave portion 134, one third concave portion 136, three first concave portions 134, one second concave portion 135, and first Are provided with two recesses 134, one sixth recess 331, and one first recess 134.

  In the sixth recess 331, a curved surface parallel to the axis L of the second air / fluid feeding piston 330 is a bottom surface, and a plane perpendicular to the axis L of the second air / fluid feeding piston 330 is provided. The plane located on the bottom surface side of the second air / liquid feeding cylinder 320 is defined as the lower side surface, and the plane located on the opening portion 129 side of the second air / fluid feeding / cylinder 320 is defined as the upper side surface.

  A second through hole 332 that penetrates to the leak pipe 133 is opened on the bottom surface of the sixth recess 331. The second through hole 332 is a cylindrical hole whose axis is a straight line perpendicular to the axis L of the second air / liquid feeding piston 330.

  When the second gas / liquid feeding piston 330 is in the first gas / liquid feeding operation position, the first gas inlet 123 and the second gas / liquid feeding piston 330 are connected to the second gas / liquid feeding cylinder. The second gas outlet 125 and a part of the third recess 136 overlap in the radial direction of the second air / liquid feeding cylinder 320 without overlapping in the radial direction of 320.

  When the second gas / liquid feeding piston 330 is in the second gas / liquid feeding operation position, the liquid inlet 126 and a part of the second recess 135 are in the radial direction of the second gas / liquid feeding cylinder 320. The liquid outlet 127 and a part of the second recess 135 overlap in the radial direction of the second air / liquid feeding cylinder 320. Thereby, the liquid inlet 126 and the liquid outlet 127 are physically connected. Then, since the O-ring 137 attached to the first recess 134 seals between the second air / liquid feeding piston 330 and the second air / liquid feeding cylinder 320, the liquid inlet 126 and the liquid outlet are provided. The space formed by the connection with 127 is sealed.

  When the second gas / liquid feeding piston 330 is in the third gas / liquid feeding operation position, the first gas outlet 124 and a part of the sixth recess 331 serve as the second gas / liquid feeding cylinder 320. Overlapping in the radial direction. An O-ring 137 attached to the first recess 134 located on the opening 129 side from the third recess 136 in the axial direction of the second air / liquid supply cylinder 320, and the second air / liquid supply cylinder The O-ring 137 attached to the first recess 134 located on both sides of the sixth recess 331 in the axial direction of 320 is formed between the second air supply / liquid supply piston 330 and the second air supply / liquid supply cylinder 320. In order to seal the gap, the space formed by the connection between the first gas inlet 123 and the first gas outlet 124 is sealed.

  Next, the movement of the second air / liquid feeding member 310 and the suction member 150 will be described with reference to FIGS.

  FIG. 8 shows a state in which no force is applied to the second air / liquid feeding piston 330 and the suction piston 170 and the leak hole 145 is sealed by the user's finger. At this time, since no force is applied to the second air / liquid feeding piston 330 and the suction piston 170, the second air / liquid feeding piston 330 is at the first air / liquid feeding operation position, and the suction piston 170 is It is placed in the first suction operation position. Since this state is the same as that in the first embodiment, description thereof is omitted.

  FIG. 9 shows a state where the second air / liquid feeding piston 330 is half pressed by the user. At this time, the second gas / liquid feeding piston 330 is placed at the third gas / liquid feeding operation position, and in the radial direction of the second gas / liquid feeding cylinder 320, the liquid inlet 126 and the second recess 135. And the liquid outlet 127 and a part of the second recess 135 overlap. Since this state is the same as the state where the first air / liquid feeding piston 130 is fully pressed by the user in the first embodiment, the description thereof is omitted.

  Next, the second air / liquid feeding piston 330 is fully pressed by the user, no force is applied to the suction piston 170, and the leak hole 145 is sealed by the user's finger as shown in FIGS. 11 will be used for explanation.

  At this time, pressurized air from the gas inflow conduit 231 is supplied to the second air feeding / feeding member 310, and water pressurized from the liquid inflow conduit 232 is supplied to the second air feeding / feeding member 310. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. Further, the second air / liquid feeding piston 330 is placed at the third air / liquid feeding operation position, and the suction piston 170 is placed at the first suction operation position.

  When the second gas / liquid feeding piston 330 is in the third gas / liquid feeding operation position, the first gas inlet 123 and the third recess 136 are related to the radial direction of the second gas / liquid feeding cylinder 320. And the first gas outlet 124 and the sixth recess 331 overlap.

  The diameter of the inner peripheral surface 121 of the second air / fluid feeding cylinder 320 at the joint between the first gas inlet 123 and the inner peripheral surface 121 of the second air / fluid feeding cylinder 320 is such that each inflow / outlet port has a different diameter. Since it is slightly larger than the diameter at the portion where it is not provided, there is a gap between the second air / liquid feeding cylinder 320 and the first gas inlet 123. Therefore, the air that has flowed into the second air / fluid feeding cylinder 320 from the first gas inlet 123 flows between the tip 131 of the second air / fluid feeding piston 330 and the second air / fluid feeding cylinder 320. It flows into the leak pipe 133 through the space formed between the bottom portion 128.

  On the other hand, since the leak pipe 133 is connected to the second through-hole 332 provided on the bottom surface of the sixth recess 331, air flows into the sixth recess 331 from the leak pipe 133 (see FIG. 11). ). Then, air flows out from the sixth recess 331 to the first gas outflow pipe 225 through the first gas outlet 124. Thereafter, the air flows from the first gas outlet line 225 into the second gas inlet 163.

  Since the flow of air flowing in from the second gas inlet 163 when the suction piston 170 is in the first air / liquid feeding operation position is the same as that in the first embodiment, description thereof is omitted. Also, when the suction piston 170 is in the second suction operation position, the description is omitted because it is the same as in the first embodiment.

  According to this embodiment, the same effect as that of the first embodiment can be obtained.

  Next, the configuration of a third endoscope air-feed / suction device 500 according to the third embodiment will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The third endoscope air-feed / suction device 500 is stored in the third endoscope 600. The third endoscope 600 is different from the first operation unit 220 in the connection state of pipes provided inside the third operation unit 620.

  The distal end portion 246 of the insertion portion 240 is provided with an objective lens and an illumination lens (not shown), a suction port 245, and a liquid feeding port 247. A suction pipe 241 extending from the third operation unit 620 is connected to the suction port 245, and a liquid outflow pipe 642 extending from the third operation unit 620 is connected to the liquid feeding port 247.

  The third air / liquid feeding member 510 and the suction member 150 mainly constitute the third air / liquid feeding / suctioning device 500 for endoscope.

  The third air / fluid feeding member 510 has a bottomed cylindrical third air / fluid feeding cylinder 520 and a cylindrical third air / liquid feeding cylinder 520 inserted into the inner peripheral surface 521 of the third air / liquid feeding cylinder 520. And an air / liquid feeding piston 530.

  The third gas / liquid feeding cylinder 520 includes a first gas inlet 123, a first gas outlet 124, and a liquid that penetrate from the inner peripheral surface 521 to the outer surface 522 of the third gas / liquid feeding cylinder 520. It has an inlet 126 and a liquid outlet 127. In the axial direction of the third air / liquid feeding cylinder 520, the respective inflow / outflow ports are provided at different positions. More specifically, the first gas inlet 123, the first gas outlet 124, the liquid inlet 126, and the liquid outlet 127 are directed from the bottom 528 of the third air / liquid feeding cylinder 520 toward the opening 529. Are provided in order.

  The diameter of the inner peripheral surface 521 of the third air / liquid feeding cylinder 520 at the joint between the inner peripheral surface 521 of the third air / liquid feeding cylinder 520 and the first gas outlet / outlet 124 is such that each inflow / outflow port It is slightly larger than the diameter at the part that is not provided.

  The gas inlet line 231 is connected to the first gas inlet 123, the first gas outlet line 225 is connected to the first gas outlet 124, the liquid inlet line 232 is connected to the liquid inlet 126, and the liquid outlet 127 is changed. A liquid outflow pipe 642 is connected to each.

  In the third air / liquid feeding piston 530, the end facing the bottom 528 of the third air / liquid feeding cylinder 520 is the tip 531, and the end of the third air / liquid feeding cylinder 520 on the opening 529 side. Is the pressing end 132.

  The third air / liquid feeding piston 530 includes a cylindrical leak pipe 133 that penetrates the entire length in the axial direction, and seventh, eighth, ninth, and And tenth recesses 534, 535, 536, and 548. The seventh to tenth recesses 534-548 have a depth in the radial direction of the third air / liquid feeding piston 530 and a width in the axial direction. The seventh to tenth recesses 534-548 differ in depth and width. Cross sections of the seventh and tenth concave portions 534 and 548 in a plane passing through the axis M of the third air / liquid feeding piston 530 are U-shaped or inverted U-shaped, and are symmetrical with respect to the axis M. is there. The cross section of the eighth recess 535 in the same plane forms a U-shape or an inverted U-shape extending toward the outer surface 522 of the third air / liquid feeding piston 530 and is line symmetric with respect to the axis M. . The cross section of the ninth recess 536 in the same plane has an inverted L shape that is wider than the depth and opens to the bottom 528.

  From the distal end portion 531 toward the pressing end portion 132, there is one ninth recess 536, one seventh recess 534, one tenth recess 548, two seventh recesses 534, and eighth. One recess 535 and one seventh recess 534 are provided.

  In the seventh to tenth recesses 534-548, the bottom surface is a curved surface parallel to the axis M of the third air / fluid feeding piston 530, and is perpendicular to the axis M of the third air / fluid feeding piston 530. A plane located on the bottom surface side of the third air / liquid feeding cylinder 520 is a lower side surface, and a plane located on the opening 529 side of the third air / liquid feeding cylinder 520 is an upper side surface. However, the ninth recess 536 has no lower side surface.

  The seventh recess 534 has the largest depth and the smallest width, and the O-ring 537 is attached to the seventh recess 534. Since the configuration of the seventh recess and the O-ring 537 is the same as the configuration of the first recess 134 and the O-ring 137, the description is omitted. The eighth to tenth recesses 535-548 have substantially the same depth and width, and have a shallower depth and longer width than the seventh recess 534.

  A second check valve 540 is attached to the bottom surface of the ninth recess 536. The second check valve 540 is made of an annular elastic member. The axis of the second check valve 540 coincides with the axis M of the third air / liquid feeding piston 530. The cross section passing through the axis M of the second check valve 540 has a V shape in which the inner peripheral side protrudes toward the tip portion 531. The outer peripheral side end of the second check valve 540 engages with the inner surface of the third air / liquid feeding cylinder 520. When the pressure applied from the tip 531 side exceeds the elastic force of the second check valve 540, the second check valve 540 is deformed to release the pressure toward the pressing end 132. When the pressure applied from the tip portion 531 side does not exceed the elastic force of the second check valve 540, the second check valve 540 does not release the pressure toward the pressing end portion 132. When pressure is applied from the pressing end 132 side, the second check valve 540 comes into close contact with the inner surface of the third air / liquid feeding cylinder 520 and does not release pressure in the direction of the tip 531.

  One end of the third air / liquid feeding piston 530 protrudes from the opening 529 of the third air / liquid feeding cylinder 520, and the second pressing portion 541 is attached thereto.

  The second pressing portion 541 includes a fourth pressing button 542 and a third base portion 544. The third base 544 is fixed to the exterior 226 of the third operation unit 620 and the third air / liquid feeding cylinder 520. The fourth push button 542 is a cylinder, and a leak hole 145 passes through the center thereof. A fourth push button 542 is attached to the third air / liquid feeding piston 530 so that the leak hole 145 and the leak pipe 133 are coaxially connected.

  A fourth coil compression spring 546 is provided between the fourth push button 542 and the third base 544. The fourth coil compression spring 546 holds the fourth press button 542 at the position that protrudes most from the third operation unit 620 when the user does not operate the fourth press button 542. At this time, the third gas / liquid feeding piston 530 is at the first gas / liquid feeding operation position where it is inserted most shallowly into the third gas / liquid feeding cylinder 520. When the user presses the fourth push button 542 completely, the third air / liquid feeding piston 530 is inserted into the third air / liquid feeding cylinder 520 most deeply. In position. At this time, it is said that the third air / liquid feeding piston 530 is fully pressed.

  Since the configuration of the suction member 150 is the same as that of the first embodiment, the description thereof is omitted.

  The cross-sectional areas of the suction pipe 241 and the suction port 245 in a plane perpendicular to the extending direction are larger than the cross-sectional areas of the liquid outflow pipe 642 and the liquid feed port 247.

  Next, the movement of the third air / liquid feeding member 510 and the suction member 150 will be described with reference to FIGS.

  First, a state where no force is applied to the third air / liquid feeding piston 530 and the suction piston 170 and the leak hole 145 is sealed by the user's finger will be described with reference to FIG.

  At this time, pressurized air from the gas inflow conduit 231 is supplied to the third air feeding / feeding member 510, and water pressurized from the liquid inflow conduit 232 is supplied to the third air feeding / feeding member 510. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. Further, since no force is applied to the third air / liquid feeding piston 530 and the suction piston 170, the third air / water feeding piston 530 is at the first air / liquid feeding operation position, and the suction piston 170 is at the first position. 1 is placed in the suction operation position.

  When the third gas / liquid feeding piston 530 is in the first gas / liquid feeding operation position, a space is provided between the tip 531 and the bottom 528 of the third gas / liquid feeding cylinder 520. And the 1st gas inflow port 123 is connected to this space. Therefore, the air supplied from the gas inflow conduit 231 to the third air supply / liquid supply member 510 via the first gas inflow port 123 flows into the leak pipe 133.

  On the other hand, since the leak hole 145 is blocked, the air pressure in the leak pipe 133 increases. The second check valve 540 closes the gap between the third air / liquid feeding cylinder 520 and the third air / water feeding / piston 530 until the inside of the leak pipe 133 reaches a predetermined air pressure. If it exceeds, the 2nd non-return valve 540 will deform | transform and the leak pipe 133 and the 1st gas outflow port 124 will be physically connected. Then, air flows out from the leak pipe 133 through the first gas outlet 124 to the first gas outlet pipe 225. Then, air flows into the second gas inlet 163.

  When the suction piston 170 is in the first suction operation position, a space is provided between the suction tip 171 and the bottom 166 of the suction cylinder 160. The second gas inlet 163 is connected to this space. Therefore, the air supplied from the first gas outlet pipe 225 to the suction member 150 via the second gas inlet 163 flows into the negative pressure inlet 165. Thereafter, air is discharged from the suction port 245 through the suction pipe 241.

  On the other hand, the O-ring 537 attached to the seventh recessed portion 534 located on the axially pressed end side of the third air / liquid feeding cylinder 520 includes the third air / liquid feeding piston 530 and the third air / water feeding / liquid feeding. Since the space between the cylinder 520 is sealed, air does not leak to other inflow / outflow ports. That is, air does not leak into the liquid inlet 126 and the liquid outlet 127.

  Next, a state where the third air / liquid feeding piston 530 is fully pressed by the user will be described with reference to FIG.

  At this time, pressurized air from the gas inflow conduit 231 is supplied to the third air feeding / feeding member 510, and water pressurized from the liquid inflow conduit 232 is supplied to the third air feeding / feeding member 510. The negative pressure is supplied from the negative pressure line 233 to the suction member 150. The third gas / liquid feeding piston 530 is placed at the third gas / liquid feeding operation position.

  When the third gas / liquid feeding piston 530 is in the third gas / liquid feeding operation position, the liquid inlet 126 and a part of the eighth recess 535 are arranged in the radial direction of the third gas / liquid feeding cylinder 520. And the liquid outlet 127 and a part of the eighth recess 535 overlap in the radial direction of the third air / liquid feeding cylinder 520.

Since the outer diameter of the eighth recess 535 is smaller than the inner diameter of the inner peripheral surface 521 of the third air / liquid feeding cylinder 520, there is a gap between the eighth recess 535 and the liquid inlet 126. Yes.
Therefore, the water that has flowed into the third air / liquid feeding cylinder 520 from the liquid inlet 126 flows into the liquid outlet 127 through the eighth recess 535. Then, water is discharged from the liquid supply port 247 through the liquid outflow conduit 242.

  On the other hand, the O-ring 537 attached to the seventh recess 534 located on both sides of the eighth recess 535 in the axial direction of the third air / fluid feeding cylinder 520 includes the third air / fluid feeding piston 530 and the third Therefore, the air does not leak into the first gas inlet 123 and the first gas outlet 124.

  FIG. 15 shows a state in which the third air / liquid feeding piston 530 is not pressed and the suction piston 170 is fully pressed by the user. At this time, the third air / liquid feeding piston 530 is placed at the first air / liquid feeding operation position, and the suction piston 170 is placed at the second suction operation position. Since this state is the same as the state in which the suction piston 170 in the first embodiment is fully pressed by the user, description thereof is omitted.

  According to this embodiment, the same effects as those of the first and second embodiments can be obtained with a simple structure.

  In addition, the position of each inflow / outflow port is not limited to the position shown in the first to third embodiments.

DESCRIPTION OF SYMBOLS 100 1st endoscope air supply / liquid feeding suction device 110 1st air supply / liquid supply member 120 1st air supply / liquid supply cylinder 121 Inner peripheral surface 122 Outer surface 123 1st gas inflow port 124 1st Gas outlet 125 Second gas outlet 126 Liquid inlet 127 Liquid outlet 128 Bottom portion 129 Opening portion 130 First air feeding / feeding piston 131 Front end portion 132 Pressing end portion 133 Leak pipe 134 First concave portion 135 Second portion Recessed portion 136 Third recessed portion 137 O-ring 139 First through hole 140 First check valve 141 First pressing portion 142 First pressing button 143 Second pressing button 144 First base portion 145 Leakage hole 146 First coil compression spring 147 Second coil compression spring 150 Suction member 160 Suction cylinder 161 Inner peripheral surface 163 Second gas inlet 1 4 Negative pressure outlet 165 Negative pressure inlet 166 Bottom 170 Suction piston 171 Suction tip 172 Suction press end 173 Negative pressure introduction pipe 174 4th recess 175 5th recess 176 O-ring 177 Seal ring 180 Suction press 181 3rd Button 182 second base 183 third coil compression spring 221 second gas outflow line 225 first gas outflow line 226 exterior 231 gas inflow line 232 liquid inflow line 233 negative pressure line 241 suction pipe Route 242 Liquid outflow conduit

Claims (17)

A gas inflow conduit through which gas flows in, a gas outflow conduit through which gas flows out, a liquid inflow conduit through which liquid flows in, and an air feeding / feeding member connected to a liquid outflow conduit through which liquid flows out;
A suction pipe connected to a suction port provided at a distal end portion of the endoscope, and a suction member to which the gas outflow pipe is directly connected from the air / liquid feeding member;
The liquid outflow conduit is connected to a liquid feeding port provided at a distal end portion of the endoscope,
The cross-sectional areas of the suction pipe and the suction port are larger than the cross-sectional areas of the gas outflow pipe, the liquid outflow pipe, and the liquid feeding port,
Gas that has flowed into the air / liquid feeding member through the gas inflow conduit directly flows into the suction member through the gas outflow conduit, and flows out of the suction port through the suction conduit,
An endoscopic air / liquid feeding / suction device in which the liquid that has flowed into the air / liquid feeding member via the liquid inflow conduit flows out from the liquid feeding port via the liquid outflow conduit.   The air / liquid feeding / suction device for an endoscope according to claim 1, wherein the gas outflow conduit not connected to the suction member is connected to a liquid feeding port after being connected to the liquid outflow conduit. A plurality of the gas outflow pipes are connected to the air / liquid feeding member,
One of the plurality of gas outlet lines is connected to the suction member;
The air supply / fluid suction device for an endoscope according to claim 1, wherein the gas outflow conduit not connected to the suction member is directly connected to an air supply port provided at a distal end portion of the endoscope. . The air / liquid feeding member has a leak hole connected to the gas inflow conduit, and first to third air / liquid feeding operation positions,
When the air supply / liquid supply member is in the first air supply / liquid supply operation position and the leak hole is sealed, the gas flowing into the air supply / liquid supply member from the gas inflow conduit is The insufflation / feeding / suctioning device for an endoscope according to claim 3, wherein the feeding / suctioning device for endoscope is guided to the feeding port through the gas outflow pipe not connected to a suction member. The air / liquid feeding member has first to third air / liquid feeding operation positions,
When the air / liquid feeding member is in the second air / liquid feeding operation position, the gas flowing into the air / liquid feeding member via the gas inflow conduit is The insufflation / feeding / suctioning device for an endoscope according to claim 3, which directly flows into the suction member and is guided to the suction port via the suction pipe. The suction member has first and second suction operation positions;
When the suction member is in the first suction operation position, the gas directly flowing into the suction member from the air / liquid feeding member via the gas outflow conduit is connected to the suction port via the suction conduit. The air / liquid feeding / suction device for an endoscope according to claim 5, which is guided to the above. The suction member is connected to a negative pressure line to which negative pressure is applied, and has first and second suction operation positions,
The endoscope air / fluid feeding / suction device according to claim 6, wherein when the suction member is at the second suction operation position, the suction conduit and the negative pressure conduit are connected. The air / liquid feeding member has first to third air / liquid feeding operation positions,
When the air / liquid feeding member is in the third air / liquid feeding operation position, the liquid that has flowed into the air / liquid feeding member via the liquid inflow conduit passes through the liquid outflow conduit. The insufflation / feeding / suctioning device for endoscope according to claim 3, which is directly guided to the feeding port.   The air / liquid feeding member can be moved linearly by a user's pressing, and is placed at the first air / liquid feeding operation position when not operated, and when half-pressed, the second air / water feeding member. 9. The endoscope air / liquid feeding / suction device according to claim 4, 5 and 8, wherein the endoscope is placed at a liquid operating position and when fully depressed, is placed at the third air / liquid feeding operation position.   The air / liquid feeding member can be moved linearly by a user's pressing, and is placed at the first air / liquid feeding operation position when not operated, and when half-pressed, the third air / liquid feeding member. 9. The endoscope air / fluid feeding / suction device according to claim 4, 5 and 8, which is placed at the liquid operation position and placed at the second air / liquid feeding operation position when fully depressed.   The suction member is linearly movable by a user's pressing, and is placed at the first suction operation position when not operated, and is placed at the second suction operation position when fully pressed. And an air / liquid feeding / suction device for an endoscope according to 7.   The said air / liquid feeding member is provided with the gas-liquid sealing member which prevents the connection with the said gas inflow conduit, the said gas outflow conduit, the said liquid inflow conduit, and the said liquid outflow conduit. Endoscope air / liquid suction device.   The air / liquid feeding / suction device for an endoscope according to claim 12, wherein the gas / liquid sealing member is an O-ring.   The said air / liquid feeding member is further equipped with the non-return valve which controls so that the gas which flowed in from the said gas inflow conduit may flow only into any one of these gas outflow conduits. Endoscope air / liquid suction device.   The endoscope air / liquid feeding / suction device according to claim 7, wherein the suction member includes a suction seal member that prevents connection between the gas outflow conduit and the negative pressure conduit.   The endoscopic air / liquid feeding / suction device according to claim 15, wherein the suction seal member is an O-ring.   The endoscopic air-feed / suction device according to claim 1, wherein a forceps port for inserting forceps or injecting a drug is connected to the suction pipe.

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