Disclosure of Invention
The invention aims to design an operation instrument to solve the problem of cross infection caused by the instrument.
The invention is realized by the following technical scheme:
The application provides an operation device, which comprises a fixed part, a moving part, a device part, a container and a puncture part; the fixing piece is provided with a guide channel extending from the proximal end to the distal end; the moving piece can reciprocate between a first position and a second position along the guide channel relative to the fixed piece; the proximal end of the instrument piece is fixedly connected to the moving piece; the container is internally stored with glue solution and is arranged on the moving path of the moving piece; the puncture element is connected with the moving element and protrudes out of the distal end surface of the moving element towards the container; wherein the piercing member is capable of piercing the container when the moving member is moved to the first position; the glue can flow out of the pierced portion of the container into the guide channel.
With the adoption of the arrangement structure, the container which can be pierced by the piercing member is arranged on the moving path of the moving member which drives the instrument member to move, and the piercing member is arranged at the distal end of the moving member, so that the piercing member has the capability of piercing the container during working. Like this, when moving the condition that the piece moved to the first position, the moving piece impaled the container through the piercing element, and the glue solution that makes in the container can flow to the direction passageway through the piercing element, after a period of time, will form the barrier that hinders the moving piece removal or will guide the passageway inside wall and the cementing structure that the piece is connected to the moving after the glue solution solidification that is arranged in the direction passageway for operating device can't normally use, with this measure restriction operating device's normal use time, avoid operating device's use repeatedly, can avoid the problem of cross infection because of using repeatedly well.
Further in order to better realize the invention, the following arrangement structure is adopted: the guide channel is arranged as a duct, and the moving piece is in plug-in sliding fit with the guide channel.
Further in order to better realize the invention, the following arrangement structure is adopted: the periphery wall of moving member is provided with first guiding gutter, the distal end of first guiding gutter sets up to the opening that forms in the distal end face of moving member.
When the setting structure is adopted, the far end of the first diversion trench arranged on the peripheral wall of the moving part forms an opening on the far end face of the moving part, so that part of glue solution flowing into the guide channel can be transferred to a position between the periphery of the moving part and the inner side wall of the guide channel through the first diversion trench, the glue solution can form a glue joint structure between the periphery of the moving part and the inner side wall of the guide channel after solidification, and the moving part and the fixing part can be fixed more reliably.
Further in order to better realize the invention, the following arrangement structure is adopted: the periphery wall of moving member is provided with the second guiding gutter, the both ends of second guiding gutter all are located between the near-end and the distal end of moving member, at least one end of second guiding gutter with first guiding gutter side direction intercommunication.
When adopting above-mentioned setting structure, set up the both ends of the second guiding gutter that all is located the moving part perisporium between the proximal end and the distal end to through at least one end and first guiding gutter side direction intercommunication, make the second guiding gutter can be as the branch will get into the position between moving part periphery and the direction passageway inside wall more evenly to the glue solution in the first guiding gutter, can form the cementing structure on wider face, make the cementing of moving part and mounting fix more reliably.
Further in order to better realize the invention, the following arrangement structure is adopted: the moving piece comprises a push rod and an operating handle connected to the far end of the push rod, and the push rod is in insertion sliding fit with the guide channel; the periphery wall of the fixing piece is provided with a window extending along the extending direction of the guide channel, and the operating handle extends out of the window to the outer side of the fixing piece.
Further in order to better realize the invention, the following arrangement structure is adopted: the proximal end of the fixing piece is provided with a fixed finger ring used for placing a thumb, and two opposite sides of the part of the operating handle, which is positioned outside the fixing piece, are provided with movable finger rings used for placing an index finger and a middle finger respectively.
Further in order to better realize the invention, the following arrangement structure is adopted: the device comprises a fixing piece, a protective tube, an instrument piece and a proximal end, wherein the fixing piece is arranged on the inner side of the protective tube, the distal end of the protective tube is fixed in the fixing piece and sealed, and the proximal end of the protective tube is closer to the proximal end of the fixing piece than the proximal end of the container.
By adopting the arrangement structure, the far end of the protective tube is sealed with the fixing piece, and the near end of the protective tube extends out of the container towards the near end, so that glue solution entering the guide channel can be well prevented from being attached to the instrument piece.
Further in order to better realize the invention, the following arrangement structure is adopted: the distal end face of the mover is provided with a proximally extending exhaust passage.
By adopting the arrangement structure, the exhaust channel is arranged on the far end surface of the moving part, so that the moving part can smoothly exhaust when moving forwards towards the far end or smoothly supplement air when moving backwards towards the near end, and the moving part can be ensured to move smoothly.
Further in order to better realize the invention, the following arrangement structure is adopted: the puncture piece is arranged as a needle tube with a head obliquely cut.
By adopting the arrangement structure, the puncture member is a hollow needle tube, the head part of the puncture member is obliquely cut to form an oblique incision extending along the axial direction, and the glue solution can be smoothly discharged through the oblique incision in a one-stage process in the process of puncturing the container by the puncture member.
Further in order to better realize the invention, the following arrangement structure is adopted: the moving member compresses the container in an extending direction of the guide passage when the moving member moves to the first position.
Further in order to better realize the invention, the following arrangement structure is adopted: the catheter is fixed in the fixed part, the instrument piece is arranged in the catheter in a penetrating mode, the moving part is located at the second position, the distal end of the instrument piece is located in the catheter, the moving part is located at the first position, and the distal end of the instrument piece is located outside the catheter.
Further in order to better realize the invention, the following arrangement structure is adopted: the container is configured as an annular bladder disposed about the instrument.
Further in order to better realize the invention, the following arrangement structure is adopted: the moving part is connected with a plurality of puncture parts, and all puncture parts are sequentially arranged around the instrument part.
Further in order to better realize the invention, the following arrangement structure is adopted: still include the mounting bracket, the mounting bracket include the barrel with set up in the flange portion of barrel distal end, the barrel wear to locate in the mesopore of container and support the inner peripheral wall of container, flange portion supports the distal end face of container.
By adopting the arrangement structure, the mounting frame supports the inner peripheral wall of the container through the cylinder body, so that the shape of the peripheral side of the container can be maintained, and the influence of inward contraction of the container on the movement of the instrument can be well avoided.
The invention has the following advantages and beneficial effects:
in the invention, a container which can be pierced by the piercing member is arranged on the moving path of the moving member which drives the instrument member to move, and the piercing member is arranged at the distal end of the moving member, so that the piercing member has the capability of piercing the container during operation. Like this, when moving the condition that the piece moved to the first position, the moving piece impaled the container through the piercing element, and the glue solution that makes in the container can flow to the direction passageway through the piercing element, after a period of time, will form the barrier that hinders the moving piece removal or will guide the passageway inside wall and the cementing structure that the piece is connected to the moving after the glue solution solidification that is arranged in the direction passageway for operating device can't normally use, with this measure restriction operating device's normal use time, avoid operating device's use repeatedly, can avoid the problem of cross infection because of using repeatedly well.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are merely used for convenience in describing the invention and to simplify the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The operation device of the application has the measures for limiting the normal use time, avoids the possibility of repeated use, can better avoid the problem of cross infection caused by repeated use, and is particularly provided with the following structure as shown in figures 1-10:
The operating instrument basically includes a fixed member 10, a movable member 20, an instrument member 30, a container 40 and a piercing member 50.
The fixed member 10 serves as a support member for the entire operation device, and provides a mounting base for other components, such as the movable member 20, the device member 30, the container 40, etc., which are mounted to the fixed member 10 in a direct or indirect manner. In use, the mount 10 is typically held in the hand and some of the operations are performed by manipulating the movement member 20 relative to the mount 10.
The fixing member 10 is provided with a guide channel 131 extending from the proximal end toward the distal end.
The moving member 20 is movably connected with the fixed member 10, and the moving member 20 and the fixed member 10 have guiding performance, so that the moving member 20 can reciprocate along the guiding channel 131 between a first position and a second position relative to the fixed member 10. Illustratively, the fixed member 10 is provided with a guiding component or structure such as a rail or groove along the guiding channel 131, and the movable member 20 is connected to the guiding component or structure by a corresponding adapting component or structure such as a slider provided thereon, so that the movable member 20 can move along the guiding channel 131. Illustratively, portions of the structure of the moveable member 20 are located outside of the fixed member 10 or exposed within the open structure of the fixed member 10 such that a person may apply a pushing force to the portions of the structure of the moveable member 20 distally or proximally along the direction of extension of the guide channel 131 to effect movement of the moveable member 20 between the first and second positions.
The instrument 30 is an elongated member, and the proximal end of the instrument 30 is fixedly connected to the movable member 20 and moves with the movement of the movable member 20. Depending on the needs of the procedure, the instrument 30 may be a lithotomy basket or a blocking basket, biopsy forceps, or the like.
The container 40 has a closed space therein, in which a glue solution is stored. The glue solution has fluidity such that it can ooze from the damaged portion of the container 40 and remain in the guide channel 131 to be at least partially adhered to the surface of the object including the inner side wall of the guide channel 131, and the glue solution is cured after being exposed to the environment for a period of time to adhere to the adhered object. The container 40 is disposed on the moving path of the moving member 20, i.e., at a position somewhere between the first position and the second position. Moving member 20, when moved to the first position, pierces container 40 by piercing member 50. Illustratively, the container 40 may be made of an elastic rubber or may be made of an iron sheet.
Attached to the displacement member 20 is a piercing member 50 having a distal end provided with a sharp portion for piercing the container 40. The distal end of the piercing member 50 projects toward the distal surface of the movable member 20 in the direction of the container 40 to enable forward piercing of the container 40 during movement of the movable member 20 from the second position to the first position.
With the movable member 20 moved to the first position, the piercing member 50 is able to pierce the container 40, leaving a piercing location on the container 40. Glue can flow out of the pierced portion of the container 40 into the guide channel 131.
In fig. 2 and 3, the moveable member 20 is in a position between the first position and the second position, and the piercing member 50 has not pierced the container 40. Continued distal movement of the moveable member 20 relative to the fixed member 10 from the position of fig. 2 and 3 will eventually reach the first position.
In this embodiment, the moving member 20 that moves the instrument member 30 is provided with the container 40 that can be pierced by the piercing member 50, and the positioning of the piercing member 50 at the distal end of the moving member 20 will enable the piercing member 50 to have the capability of piercing the container 40 during operation. In this way, when the moving member 20 moves to the first position, the moving member 20 pierces the container 40 through the piercing member 50, so that the glue solution in the container 40 can flow into the guiding channel 131 through the piercing portion, after a period of time, the glue solution in the guiding channel 131 will form an obstacle for obstructing the movement of the moving member 20 or a glue joint structure for connecting the inner side wall of the guiding channel 131 with the moving member 20 after solidification, so that the operating device cannot be used normally.
For example, glue solutions with different curing durations can be selected according to the type of surgical instrument. Specifically, some surgical instruments with shorter surgical time can select glue solution with shorter curing time. For some surgical instruments with longer surgical duration, a glue solution with longer curing time can be selected. Illustratively, the curing time for storing the glue in the container 40 may be half an hour, 1 hour, 2 hours, etc. It should be noted that the glue solution in the prior art can control the curing time of the glue solution by adjusting the components of the glue solution. The curing time period refers to the time period between the time when the glue solution seeps out from the container 40 and the time when the glue solution is cured to the time when the moving member 20 can be blocked from moving so that the operating device cannot be used normally.
According to some alternative embodiments, the inside of the fixed part 10 is provided with a guide channel 131, the guide channel 131 is provided as a duct, the profile of the moving part 20 is adapted to the profile of the guide channel 131, inserted into the guide channel 131, and slidingly engaged with the inner side wall of the guide channel 131 by means of the peripheral wall thereof. The moving member 20 is in guiding fit with the guiding channel 131 through the shaft hole in an inserting mode, the structure is simple, and the moving member 20 moves stably.
According to some alternative embodiments, as shown in fig. 4 and 5, the peripheral wall of the moving member 20 is provided with a first guide groove 2111, the first guide groove 2111 has a certain length in the extending direction of the guide passage 131, and the distal end of the first guide groove 2111 is provided as an opening formed on the distal end surface of the moving member 20 such that a portion of the glue solution flowing into the guide passage 131 can be transferred to a position between the outer periphery of the moving member 20 and the inner side wall of the guide passage 131 through the first guide groove 2111. After solidification, the glue solution entering the first diversion trench 2111 can form a glue joint structure between the periphery of the moving member 20 and the inner side wall of the guiding channel 131, so that the glue joint structure and the glue joint structure are glued together in the lateral direction, thereby fixing the moving member 20 and the fixed member 10 more reliably, and effectively reducing the possibility of being reused.
The number of the first diversion trenches 2111 may be one or a plurality of mutually non-communicated diversion trenches. In some embodiments, the first diversion trenches 2111 are arranged in a plurality of channels as in fig. 5, and all the first diversion trenches 2111 are sequentially and equidistantly arranged along the axial direction of the moving member 20, so that the glue solution can be uniformly transferred between the outer periphery of the moving member 20 and the inner side wall of the guiding channel 131.
Preferably, as shown in fig. 5, the peripheral wall of the moving member 20 is further provided with a second guide groove 2112, and both ends of the second guide groove 2112 are located between the proximal end and the distal end of the moving member 20. At least one end of the second guide groove 2112 is laterally communicated with the first guide groove 2111 to more uniformly transfer the glue solution entered into the first guide groove 2111 to a position between the outer circumference of the moving member 20 and the inner side wall of the guide passage 131.
The second diversion trench 2112 is exemplified as a circumferentially extending trench as shown in fig. 5, and may also be exemplified as a trench extending spirally along the peripheral wall of the moving member 20, however, the second diversion trench 2112 may also include both a circumferentially extending trench and a spirally extending trench in the case of providing a plurality of channels.
Illustratively, the end of the second channel 2112 may be in lateral communication with the middle section of the first channel 2111, or may be in lateral communication with the proximal end of the first channel 2111. In the situation shown in fig. 5, some of the second channels 2112 have ends that laterally communicate with the middle section of the first channel 2111, and other second channels 2112 have ends that laterally communicate with the proximal end of the first channel 2111.
In some embodiments, both ends of the second diversion trench 2112 are in lateral communication with the first diversion trench 2111. Under the condition that the first diversion trench 2111 is one, two ends of the second diversion trench 2112 are respectively communicated with the first diversion trench 2111 from two sides of the first diversion trench 2111, and under the condition that the first diversion trench 2111 is multiple, two ends of the second diversion trench 2112 are respectively laterally communicated with different first diversion trenches 2111.
In some embodiments, as shown in fig. 5, a plurality of first diversion trenches 2111 are disposed on the peripheral wall of the moving member 20, and a plurality of second diversion trenches 2112 are disposed on the peripheral wall of the moving member along the circumferential Xiang Yi sequence at equal intervals, all the second diversion trenches 2112 are disposed in a row in the circumferential direction and the axial direction, the end portions of part of the second diversion trenches 2112 are laterally communicated with the middle section of the first diversion trench 2111, and the end portions of part of the second diversion trenches 2112 are laterally communicated with the proximal end of the first diversion trench 2111. The end portions of the second diversion trenches 2112 located at the same axial position are circumferentially communicated with each other through the first diversion trench 2111.
When the first diversion trench 2111 and the second diversion trench 2112 are simultaneously arranged on the peripheral wall of the moving member 20, the second diversion trench 2112 serves as a branch to more uniformly transfer the glue solution entering the first diversion trench 2111 to the position between the outer periphery of the moving member 20 and the inner side wall of the guiding channel 131, so that a gluing structure can be formed on a wider surface, and the gluing fixation of the moving member 20 and the fixing member 10 is more reliable.
According to some alternative embodiments, as shown in fig. 4, the moving member 20 includes a push rod 21 and an operating handle 22 connected to a distal end of the push rod 21, and the push rod 21 is inserted into a shaft hole of the guide channel 131 to achieve a sliding fit.
In some embodiments, as shown in fig. 1 and 2, the peripheral wall of the fixing member 10 is provided with a window 111 exposing the side of the guide passage 131, the window 111 extends along the extending direction of the guide passage 131, and a portion of the operation handle 22 protrudes from the window 111 to the outside of the fixing member 10.
Preferably, the portion of the handle 22 outside the holder 10 is formed with a sleeve surrounding the holder 10, and opposite sides of the sleeve are provided with moving finger rings 221 for placing the index finger and the middle finger, respectively. The moving finger ring 221 may be a closed ring or an open ring structure as shown in fig. 4.
Preferably, the proximal end of the fixing member 10 is provided with a fixing finger ring 112 for receiving a thumb so that a person can easily operate the fixing member 10 and the moving member 20 with one hand.
In other embodiments, the lever 22 extends proximally along the axis of the plunger 21 beyond the guide channel 131 to the outside of the mount 10, similar to the configuration of a conventional medical injector barrel to plunger.
According to some alternative embodiments, as shown in fig. 2 and 3, a protective tube 80 is fixed in the fixing member 10, a distal end of the protective tube 80 is fixed to the fixing member 10, and the instrument member 30 is inserted into the protective tube 80. The distal end of the protective tube 80 is fixed to the fixing member 10 and sealed such that glue cannot enter the protective tube 80 from the distal end of the protective tube 80, and the proximal end of the protective tube 80 is closer to the proximal end of the fixing member 10 than the proximal end of the container 40, so as to better avoid glue entering the guide channel 131 from the proximal end of the protective tube 80 into the protective tube 80 to be attached to the instrument 30.
The protective tubing 80 may be, for example, a hose or a wand.
In some embodiments, the proximal end of the shield tube 80 extends into a through hole formed in the center of the push rod 21 of the mover 20 along the extending direction of the guide channel 131.
According to some alternative embodiments, as shown in fig. 3, the movable member 20 is provided with a vent passage 213, a distal opening of the vent passage 213 is formed on a distal end surface of the movable member 20, the vent passage 213 extends proximally, and a space in front of the distal end surface of the movable member 20 of the guide passage 131 is communicated with the environment. The moving member 20 can smoothly exhaust air when moving forward toward the distal end and smoothly supplement air when moving backward toward the proximal end, so as to ensure that the moving member 20 can move smoothly.
According to alternative embodiments, as shown in fig. 7, the piercing member 50 is configured as a needle tube, and the head portion of the needle tube is obliquely cut to form an oblique slit 51 extending in the axial direction, so that the glue solution can be smoothly discharged through a portion of the oblique slit, which has not been inserted into the container 40, during the piercing of the container 40 by the piercing member 50.
According to some alternative embodiments, as shown in fig. 1-3, the distal end of the fixing member 10 is fixedly connected to the proximal end of a flexible catheter 60, the instrument member 30 is inserted into the catheter 60, the distal end of the instrument member 30 is completely located in the catheter 60 without using the instrument member 30, the instrument member 30 can be extended or retracted from the catheter 60 along with the movement of the moving member 20, and the instrument member 30 is pushed out of the catheter 60 by the moving member 20 only when the relevant operation is required to be completed by using the instrument member 30. Wherein, when the moving member 20 is located at the second position, the distal end of the instrument member 30 is located inside the catheter 60, and when the moving member 20 is located at the first position, the distal end of the instrument member 30 is located outside the catheter 60. As shown in fig. 1 and 2, the displacement member 20 is positioned between a second position and a first position, wherein the distal end of the instrument member 30 extends beyond the catheter 60.
According to some alternative embodiments, as shown in fig. 3-6, the container 40 is provided as an annular capsule which is arranged around the device 30 to provide a greater glue reservoir in the event of limited space. The container 40 may be a closed annular capsule to provide a complete annular capsule for storing glue or an open annular capsule as shown in fig. 6.
In some embodiments where a protective tube 80 is provided, as shown in FIG. 3, the container 40 surrounds the outer periphery of the protective tube 80.
According to alternative embodiments, a plurality of piercing elements 50 are coupled to the displacement member 20 in order to create a plurality of piercing locations on the container 40 for the glue to flow smoothly.
In some embodiments in which the container 40 is provided as an annular capsule, all of the piercing elements 50 are sequentially disposed about the instrument 30.
Preferably, as shown in fig. 3 to 6, the container 40 is supported to be held in shape by a mounting bracket 70, and the mounting bracket 70 is a flange-like member including a cylindrical body 71 and a flange 72 provided at a distal end of the cylindrical body 71. The tubular body 71 is inserted into the middle hole of the annular container 40, and supports the inner peripheral wall of the container 40 with the outer peripheral wall, and the proximal end surface of the flange 72 supports the distal end surface of the container 40. The mounting bracket 70 maintains the shape of the peripheral side of the container 40 by the cylindrical body 71 and the flange 72, and can preferably avoid the influence of the inward contraction of the container 40 on the movement of the instrument 30.
According to some alternative embodiments, the distal end of the container 40 abuts against the fixing member 10 in the extending direction along the guide passage 131, so that the container 40 is positioned at a certain position on the moving path of the moving member 20. In this position of the container 40, when the moving member 20 moves to the first position, the moving member 20 compresses the container 40 in the extending direction of the guide passage 131, so that the container 40 is crushed to some extent, so that the glue solution in the container 40 can be squeezed out more before the moving member 20 moves to the first position.
According to some alternative embodiments, as shown in fig. 2 and 3, the fixture 10 includes a barrel 11, an end cap 12, and an inner liner 13. An inner bushing 13 is inserted into the barrel 11, and an end cap 12 is screwed and fixed at the distal end of the barrel 11, so that the inner bushing 13 is pressed and fixed at the distal end of the barrel 11. The inner bushing 13 is provided with a stepped through hole therein, which provides a guide passage 131. The container 40 abuts against the stepped surface of the stepped through hole. The moving member 20 is movably inserted in the inner bushing 13 to slidably fit with the guide passage 131. The proximal end of the instrument 30 is fixedly coupled to the moving member 20 after passing through the end cap 12 and the inner liner 13 in sequence.
In some embodiments, as shown in fig. 2, the peripheral wall of the barrel 11 is provided with a window 111 exposing the side of the guide channel 131, and the window 111 extends along the extending direction of the guide channel 131.
In some embodiments, a stationary finger ring 112 is disposed at the distal end of the barrel 11.
According to some alternative embodiments, as shown in fig. 2-5, the mover 20 includes a push rod 21 and an operating handle 22 detachably mounted to a proximal end of the push rod 21. The penetrating member 50 is fixedly attached to the distal end of the plunger 21.
In some embodiments, the push rod 21 is movably inserted into the guide channel 131 inside the inner liner 13. A portion of the lever 22 protrudes through a window 111 provided in the cylinder 11.
In some embodiments, the peripheral wall at the distal end of the push rod 21 is provided with a first channel 2111 alone or with both a first channel 2111 and a second channel 2112.
Preferably, as shown in fig. 5 to 8, the push rod 21 includes a detachable rod body 211 and an end cover 212, and the outer peripheral wall of the push rod 21 is provided with a first diversion trench 2111 alone or with a first diversion trench 2111 and a second diversion trench 2112 at the same time. The center of the push rod 21 is provided with a center hole 2113, the end cap 212 is screwed into the center hole 2113 of the rod body 211, and the distal end face of the end cap 212 is flush with the distal end face of the rod body 211. The puncture element 50 is fixed to the cap 212 by being inserted therethrough.
As shown in fig. 3, the central portion of the central bore 2113 has a tapered section that tapers from the distal end toward the proximal end such that a section of the central bore 2113 forward of the tapered section has a larger aperture than a section rearward of the tapered section. The protective tube 80 is disposed through the central bore 2113, and the distal end of the protective tube 80 is disposed through a smaller bore section of the central bore 2113.
In some embodiments, the protective tube 80 passes through a through hole provided in the center of the end cap 212 and contacts the hole wall to achieve a dynamic sealing fit.
According to some alternative embodiments, as shown in fig. 3, the push rod 21 is provided with an exhaust channel 213. The distal opening of the vent channel 213 is located on the distal face of the push rod 21, and the vent channel 213 extends through the push rod 21 along the push rod 21 from the distal face to the proximal face.
In some embodiments, the exhaust passage 213 provided by the push rod 21 of the moving member 20 is constituted by a central hole 2113 provided in the rod body 211 and an air vent 2121 provided in the end cap 212. A central hole 2113 penetrates the rod body 211, and a distal end of the central hole 2113 is screwed with the end cap 212 by an internal thread. The vent 2121 penetrates the end cap 212 from the distal end face to the proximal end face, a proximal end opening of the vent 2121 communicates with the central hole 2113, and a distal end opening of the vent 2121 is formed on the distal end face of the end cap 212 as a distal end opening of the exhaust channel 213.
The vent 2121 provided in the end cap 212 may be provided in plural numbers, in addition to one. As shown in fig. 7-10, a plurality of vent holes 2121 on the end cap 212 are arranged in sequence along the axial direction of the end cap 212.
In this embodiment, a distal opening of the air discharge channel 213 is formed on the distal end face of the moving member 20, and the air discharge channel 213 extends proximally, communicating the space of the guide channel 131 in front of the distal end face of the moving member 20 with the environment. The moving member 20 can smoothly exhaust air when moving forward toward the distal end and smoothly supplement air when moving backward toward the proximal end, so as to ensure that the moving member 20 can move smoothly.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.