WO2024012037A1 - 一种活检针 - Google Patents

一种活检针 Download PDF

Info

Publication number
WO2024012037A1
WO2024012037A1 PCT/CN2023/093887 CN2023093887W WO2024012037A1 WO 2024012037 A1 WO2024012037 A1 WO 2024012037A1 CN 2023093887 W CN2023093887 W CN 2023093887W WO 2024012037 A1 WO2024012037 A1 WO 2024012037A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
seat
upper cover
insertion direction
needle seat
Prior art date
Application number
PCT/CN2023/093887
Other languages
English (en)
French (fr)
Inventor
彭愉林
冯波
曾俊华
Original Assignee
经方精密医疗（深圳）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 经方精密医疗（深圳）有限公司 filed Critical 经方精密医疗（深圳）有限公司
Publication of WO2024012037A1 publication Critical patent/WO2024012037A1/zh

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms

Definitions

  • the present application relates to medical assistive devices and, more particularly, to a biopsy needle.
  • the biopsy needle of which the semi-automatic biopsy needle is more commonly used.
  • the Chinese utility model patent with the authorization announcement number CN213075849U and the name "A manipulation structure and biopsy needle” discloses a semi-automatic biopsy needle.
  • the outer needle seat of this semi-automatic biopsy needle does not have a sufficient limiter structure for moving up, down, left and right, and its stability is poor.
  • this semi-automatic biopsy needle is loaded by pulling the handle, and then pushing the handle forward to fire.
  • the Chinese invention patent application with the authorization announcement number CN113303839A and the name "Safety Locking Device for Semi-Automatic Biopsy Needles” discloses a safety locking device for the handle.
  • a locking piece is inserted into the through hole of the transition section of the handle, and is passed along the The through-hole movable locking piece can switch the locked state and the non-locking state as needed. In the locked state, the stroke of the handle will be blocked by the locking piece and cannot be fired.
  • the locking piece inserted on the handle outside the housing still has the risk of falling off easily, and cannot effectively prevent the biopsy needle from being fired accidentally.
  • the technical problem to be solved by this application is to provide a biopsy needle that can effectively achieve safe locking and avoid false firing in view of the above-mentioned defects of the prior art.
  • a biopsy needle which includes an upper cover, a base, an outer needle assembly and an inner needle assembly.
  • a needle inlet is formed at one end and a needle outlet is formed at the needle outlet end.
  • the outer needle assembly includes an outer needle seat and an outer needle tube fixedly connected to the outer needle seat.
  • the inner needle assembly includes an inner needle seat and an inner needle fixedly connected to the outer needle seat.
  • the inner needle bar of the seat where:
  • the outer needle holder is installed in the internal space of the upper cover and the base by reciprocating sliding along the needle insertion direction.
  • the outer needle holder is also provided with the inner space of the upper cover and the base to cooperate in the reciprocating sliding direction to provide at least one buckle.
  • the elastic buckle structure is in the closed position, and the outer needle tube extends through the needle outlet;
  • the inner needle bar is inserted into the outer needle tube after passing through the needle inlet.
  • the inner needle seat is provided with a loading rod that extends in a direction parallel to the needle insertion direction and is slidably inserted into the internal space of the upper cover and the base.
  • a guide rod, at least one of the loading rod and the guide rod is provided with an engaging structure that cooperates with the outer needle seat to pull the inner needle seat to move backward in the needle insertion direction and at the same time drive the outer needle seat to move backward,
  • the loading rod is also provided with a firing structure that releases the buckle of the elastic buckle structure in the process of pushing the inner needle seat to move forward in the needle insertion direction;
  • the biopsy needle is also provided with a safety buckle at the needle entry end formed by the upper cover and the base being fastened together.
  • the safety buckle has a mounting post that is coaxially rotatably mounted on the needle entry port, and the mounting post has a hole along the axis. There is a through inner needle hole for the inner needle bar to pass through.
  • the outer periphery of the mounting column and the needle inlet are provided with a backward movement limiting structure that cooperates with the axial backward movement of the mounting column.
  • the mounting column There is also a rotation operation part exposed outside the needle inlet to operate the installation column to rotate.
  • the rotation operation part is provided with a locking protrusion that can be stuck on at least one of the loading rod and the guide rod after rotating at an angle.
  • One of the at least one locking slots corresponding to the at least one snap gear is opened to prevent the inner needle seat from moving forward and backward in the needle insertion direction;
  • An elastic member that is elastically deformed in the needle insertion direction is also in contact between the outer needle seat and the safety buckle.
  • the elastic member pulls the inner needle seat and simultaneously drives the outer needle seat to move backward to the elastic buckle.
  • the structure is compressed when it is engaged in a engaging position.
  • the elastic reset drives the outer needle tube to be fired.
  • the backward movement limiting structure provided between the outer periphery of the mounting post and the needle entry end includes an annular flange formed on the outer periphery of the mounting post and an inlet end.
  • the upper cover and the base of the needle end jointly define a surrounding annular groove, and the annular flange is installed in the annular groove to limit the axial rearward movement of the installation column.
  • the elastic member is a spring
  • the rear end of the spring is sleeved on the mounting post and offsets the front end surface of the ring flange.
  • the front end is installed in the spring mounting hole opened in the outer needle seat.
  • the outer needle holder has a first slot on the first side in the needle insertion direction, and a second slot on the second side in the needle insertion direction, so
  • the front ends of the loading rod and the guide rod of the inner needle seat are respectively provided with first and second bosses protruding toward the first and second clamping grooves.
  • the first and second bosses are The bases are respectively placed into the first and second latching grooves to form an engaging structure; the inner needle holder is pulled to move backward until the first and second bosses are respectively in contact with the first and second latching grooves.
  • the front portion of the first slot on the first side of the outer needle holder in the needle insertion direction protrudes relatively from the at least one buckling position.
  • the inner wall of the upper cover corresponding to the first side of the outer needle seat forms an elastic hook, and the elastic hook is connected with the at least one group of gear bumps.
  • the firing structure of the loading rod of the inner needle seat is a firing slope formed on the other side of the first boss at the front end of the loading rod away from the outer needle seat.
  • guide ribs are provided at the upper portions of the front ends of the guide rod and the loading rod, and the guide ribs are respectively slid into corresponding guide chute formed on the inner top of the upper cover.
  • an upper limit block is provided on the top of the outer needle holder in the needle insertion direction, and the upper limit block has a first limit top surface, a first limit left On the side and the right side of the first limiter, an upper limit chute for installing the upper limit block is provided on the inner top of the upper cover.
  • the upper limit chute has a first limit joint with the upper limit block.
  • the second limiting top surface of the upper limit block has abutted with the first limiting left side and the first limiting right side of the upper limit block, and the left side and upper limit of the upper limiting chute have respectively abutted The right side of the chute; the bottom of the outer needle seat in the needle insertion direction is provided with a lower limit block.
  • the lower limit block has a first limit bottom surface, a second limit left side and a second limit right side.
  • the base is provided with a lower limiting chute for installing the lower limiting block.
  • the lower limiting chute has a second limiting bottom surface that abuts and cooperates with the first limiting bottom surface of the lower limiting block;
  • the left side and the right side of the lower limiting chute respectively abut and cooperate with the second limiting left side and the second limiting right side of the lower limiting block.
  • the upper cover is provided with at least one viewing window corresponding to at least one snapping position of the outer needle seat, and a position mark is provided corresponding to each viewing window.
  • the left and right sides of the base in the needle insertion direction are also respectively formed with hand-held rings, and a rubber pad is embedded in the inner periphery of the hand-held ring.
  • the biopsy needle according to the embodiment of the present application is provided with a safety buckle that can rotate but cannot move axially at the needle insertion end formed by the upper cover and the base.
  • the locking protrusion on the rotating operating part rotates to a certain angle and snaps into the loading rod or the locking groove on the guide rod of the inner needle seat to lock the inner needle seat to prevent accidental firing.
  • Turn the safety buckle in the opposite direction to make the locking protrusion The inner needle seat can be unlocked by pulling it out of the slot. Since the safety buckle is limited by the upper cover and the base, the needle insertion end cannot move axially, so there is no risk of falling off, effectively achieving safe locking of the biopsy needle.
  • the outer needle seat can only move axially and cannot move up, down, left, and right through the fastening of the upper cover and the base, thereby improving the stability of the biopsy needle.
  • Figure 1 is a schematic diagram of the overall structure of a biopsy needle according to one embodiment of the present application.
  • Figure 2 is a schematic diagram of the exploded structure of the biopsy needle shown in Figure 1;
  • Figure 3 is a schematic structural diagram of an upper cover according to an embodiment of the present application.
  • Figure 4 is a schematic structural diagram of an outer needle assembly according to an embodiment of the present application.
  • Figure 5 is a schematic structural view of the outer needle assembly shown in Figure 4 from another angle;
  • Figure 6 is a schematic structural diagram of the inner needle assembly according to one embodiment of the present application.
  • Figure 7 is a schematic structural diagram of an insurance buckle according to an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a base according to an embodiment of the present application.
  • Figure 9 is a structural cross-sectional view of the biopsy needle in an initial state according to one embodiment of the present application.
  • Figure 10 is a structural cross-sectional view of the biopsy needle shown in Figure 9 in the first buckling position
  • Figure 11 is a structural cross-sectional view of the biopsy needle shown in Figure 9 in the second buckling position
  • Figure 12 is a structural cross-sectional view of the safety buckle in an initial state in an embodiment of the present application.
  • Figure 13 is a structural cross-sectional view of the safety buckle shown in Figure 12 in a locked state.
  • FIGS. 1 and 2 respectively show the overall structure and exploded structure schematic diagram of the biopsy needle 100 according to an embodiment of the present application.
  • the biopsy needle 100 is mainly composed of an upper cover 10 , a base 20 , an outer needle assembly 30 , an inner needle assembly 40 , a safety buckle 50 and a spring 60 .
  • the upper cover 10 and the base 20 are interlocked to form an internal space and form a needle inlet (not visible in Figure 1) at the needle inlet end, and a needle outlet 80 at the needle outlet end (see Figure 1).
  • two buckles 111 and 112 respectively extend downward on the left and right sides of the upper cover 10 in the needle insertion direction, and are provided on the left and right sides of the front end in the needle insertion direction.
  • 182b is inserted into the mounting guide positioning holes 242a and 242b.
  • the outer needle assembly 30 includes an outer needle base 31 and an outer needle tube 32 fixedly connected to the outer needle base 31 .
  • the outer needle seat 31 is slidably installed in the internal space of the upper cover 10 and the base 20 along the needle insertion direction, and the outer needle tube 32 extends through the needle outlet 80 .
  • the inner needle assembly 40 includes an inner needle seat 41 and an inner needle bar 42 fixedly connected to the inner needle seat 41.
  • the inner needle bar 42 passes through the needle entrance. Then it is inserted into the outer needle tube 32 .
  • a sampling groove 421 is opened at the front end of the inner needle bar 42 .
  • the safety buckle 50 is installed on the needle insertion end formed by the fastening of the upper cover 10 and the base 20, and is used to lock and unlock the forward and backward movement of the inner needle seat 41 in the needle insertion direction.
  • the spring 60 is in contact between the outer needle seat 31 and the safety buckle 50 to provide elastic deformation in the needle insertion direction.
  • the outer needle seat 31 is provided with an upper limit block 311 at the top in the needle insertion direction.
  • the upper limit block 311 has a first limit top surface 3113, a first limit block 311, and a first limit block 311.
  • the inner top of the upper cover 10 is provided with an upper limit chute 17 for installing the upper limit block 311.
  • the upper limit chute 17 has a second limit top surface 173, a left side 171 of the upper limit chute and an upper limit slide. 172 on the right side of the slot.
  • the second limiting top surface 173 of the upper limiting chute 17 abuts and cooperates with the first limiting top surface 3113 of the upper limiting block 311 , and the upper limiting chute 17 slides
  • the left side surface 171 of the slot and the right side surface 172 of the upper limit chute abut and cooperate with the first limiting left side surface 3111 and the first limiting right side surface 3112 of the upper limiting block 311 respectively.
  • a lower limiting block 313 is provided at the bottom of the outer needle seat 31 in the needle insertion direction.
  • the lower limiting block 313 has a first limiting bottom surface 3133, a second limiting left side 3131, and a second limiting right side 3132.
  • the base 40 is provided with a lower limiting chute 25 for installing the lower limiting block 313 .
  • the second limiting bottom surface 253 of the lower limiting chute 25 abuts and cooperates with the first limiting bottom surface 3133 of the lower limiting block 313 .
  • the side surface 251 and the right side surface 252 of the lower limiting chute abut and cooperate with the second limiting left side surface 3131 and the second limiting right side surface 3132 of the lower limiting block 313 respectively.
  • the outer needle holder 30 can only slide back and forth in the needle insertion direction in the internal space formed by the fastening of the upper cover 10 and the base 20, and cannot move up, down, left, and right, ensuring that the biopsy needle 100 is very stable during loading and firing.
  • the upper cover 10 is provided with a first T-shaped semi-cylindrical groove 16 at the needle outlet end
  • the base 20 is provided with a second T-shaped semi-cylindrical groove 23 at the needle outlet end.
  • they After being fastened with the base 20, they enclose a T-shaped cylindrical space in the needle outlet 80, in which a T-shaped cylindrical member 321 is installed to guide the outer needle tube 32 of the outer needle assembly 30 to penetrate, ensuring the coaxiality of puncture.
  • the upper cover 10 is provided with a first arc-shaped groove 181 and a second arc-shaped groove 183 connected with each other at the needle entry end
  • the base 20 is provided with a third arc-shaped groove 181 at the needle entry end corresponding to the first arc-shaped groove 181.
  • the groove 24 after the upper cover 10 and the base 20 are fastened, surrounds a needle inlet, which is used to install the safety buckle 50 for the inner needle shaft 42 of the inner needle assembly 40 to penetrate.
  • the outer needle seat 31 is provided with a spring mounting hole 312 extending from the rear end to the front end in the needle insertion direction for installing the spring 60.
  • the front end of the spring 60 is in contact with the front end surface of the spring mounting hole 312. .
  • the rear end of the spring 60 is sleeved on the mounting post 51 of the safety buckle 50 and abuts against the front end surface of the annular flange 52 . In this way, when the outer needle seat 30 slides backward in the internal space formed by the coupling of the upper cover 10 and the base 20 , the spring 60 is compressed.
  • the outer needle seat 31 is provided with a first slot 318 extending along the needle insertion direction on the first side (i.e., the right side) in the needle insertion direction, and on the second side in the needle insertion direction.
  • a second slot 314 extending along the needle insertion direction is provided on the side (i.e., the left side).
  • the first slot 318 and the second slot 314 are used to engage with the first boss 414b and the first boss 414b on the inner needle seat 41 respectively.
  • the second boss 414a cooperates to drive the outer needle seat 31 to move backward together with the inner needle seat 41 .
  • the first side (ie the right side) of the outer needle seat 31 in the needle insertion direction also protrudes the first set of gear projections 315a and 315b and the second group of gears in front of the second slot 318.
  • the channels 317 facing the second slot 318 are formed between the convex blocks 316a and 316b, the first group of two gear convex blocks 315a and 315b, and the second group of the second group of the two gear convex blocks 316a and 316b.
  • the first set of gear protrusions 315a, 315b and the second set of gear protrusions 316a, 316b respectively correspond to the two strokes of the outer needle seat 31 moving backward from the initial state, that is, the two buckles of the biopsy needle 100. gear.
  • an elastic hook 19 is formed on the inner wall of the upper cover 10 corresponding to the first side (ie, the right side) of the outer needle seat 31 .
  • the elastic hook 19 can pass over the first set of gear protrusions 315a, 315b or the second set of gear protrusions 316a, 316b when the outer needle base 31 moves backward relative to the upper cover 10, and then connects with the first set of gear protrusions 316a, 316b.
  • the bumps 315a, 315b or the second group of gear bumps 316a, 316b are limited to prevent the outer needle seat 31 from moving forward, ensuring that the outer needle base 31 is in the first group of gear bumps 315a, 315b or the second group.
  • the first engaging gear or the second engaging gear corresponding to the gear protrusions 316a and 316b.
  • the outer needle seat 31 is formed by the elastic hook 19 and the first set of gear protrusions 315a, 315b and the second set of gear protrusions 316a, 316b in the internal space formed by the fastening of the upper cover 10 and the base 20.
  • the elastic buckle structure realizes the design of two buckle gears in the reciprocating sliding direction.
  • the inner needle seat 41 includes a hand-held part 411 , and the inner needle bar 42 is fixedly connected to the hand-held part 411 .
  • the inner needle seat 41 also extends a guide rod 413 and a loading rod 412 from the front end of the hand-held portion 411 in a direction parallel to the needle insertion direction (that is, the axial direction of the inner needle tube 42).
  • the guide rod 413 and the loading rod 412 are respectively located in the inner needle tube. 42 on the left and right sides.
  • the upper cover 10 also has first guide grooves 185 and second guide grooves 184 corresponding to the left and right sides of the needle inlet for the loading rod 412 and the guide rod 413 of the inner needle seat 41 to be inserted. Movement provides guidance.
  • the front end of the loading rod 412 is provided with a first boss 414b protruding into the first slot 318 on the right side of the outer needle seat 31
  • the front end of the guide rod 413 is provided with a first boss 414b extending toward the left side of the outer needle seat 31 .
  • a second boss 414a protrudes from the second slot 314 on the side.
  • the first boss 414b and the second boss 414a are placed in the first slot 318 and the second slot 314 respectively to offset the rear end surface 3181 of the first slot 318 and the rear end face 3141 of the second slot 314, thus forming a
  • the engaging structure can be used to pull the inner needle seat 41 to move backward in the needle insertion direction and at the same time drive the outer needle seat 31 to move backward.
  • the upper front ends of the guide rod 413 and the loading rod 412 are provided with guide ribs 416a and 416b.
  • the guide ribs 416a and 416b are respectively slid into the guide chute 186a and 186b formed on the inner top of the upper cover 10, which can be the inner needle seat.
  • the forward and backward movement of 41 provides further guidance, reduces the shaking of the inner needle seat 41 after being pulled out and loaded, and enhances the stability of the biopsy needle 100.
  • the cooperation between the guide ribs 416a and 416b and the guide slide grooves 186a and 186b can also prevent the inner needle seat 41 from being completely pulled out from the rear end.
  • the other side of the first boss 414b at the front end of the loading rod 412 away from the outer needle seat 31 forms a firing slope 417.
  • the middle channel 317 of the position bumps 316a, 316b can pass through the channel 317.
  • the firing slope 417 at the front end of the loading rod 412 can push the elastic hook 19 outward, so that the elastic hook 19 can be pushed outward.
  • the hook 19 is disengaged from the first group of gear protrusions 315a, 315b or the second group of gear protrusions 316a, 316b, thereby releasing the elastic hook 19 from the first group of gear protrusions 315a, 315b or the second group.
  • the engagement of the gear bumps 316a and 316b is thereby releasing the elastic hook 19 from the first group of gear protrusions 315a, 315b or the second group.
  • the outer needle seat 31 can be pushed forward instantly under the elastic force of the compressed spring 60, thereby driving the outer needle tube 32 to be fired and penetrate into the target position.
  • the firing slope 417 can also be replaced by other firing structures that can also release the elastic buckling structure in the process of pushing the inner needle seat 41 forward.
  • the hand-held portion 411 of the inner needle seat 41 is pulled backward, and the first boss 414b and the second boss 414a at the front end of the loading rod 412 and the guide rod 413 are connected with the first clamping groove 318 and the second clamping groove 318 .
  • the contact of the rear end surface of the groove 314 simultaneously drives the outer needle seat 31 to move backward to perform the loading operation, and the spring 60 is gradually compressed.
  • the elastic hook 19 engages with the first set of gear protrusions 315a, 315b to prevent the outer needle seat 31 It moves forward under the elastic force of spring 60.
  • the biopsy needle 100 is in the first engaging position of the upper chamber. Then, as shown in Figure 11, continue to pull the hand-held portion 411 of the inner needle seat 41 backward, through the first boss 414b and the second boss 414a at the front end of the loading rod 412 and the guide rod 413, and the first clamping groove 318 and the second
  • the contact of the rear end surface of the slot 314 simultaneously drives the outer needle seat 31 to continue to move backward, and the spring 60 is further compressed.
  • the elastic hook 19 engages with the second set of gear protrusions 316a, 316b to prevent the outer needle holder 31 from moving backward.
  • the biopsy needle 100 is in the second engaging position of the upper chamber.
  • the biopsy needle 100 needs to be fired during surgery, regardless of whether the biopsy needle 100 is in the first buckling position shown in Figure 10 or the second buckling position shown in Figure 11, push the handle of the inner needle seat 41 forward. 411, so that the first boss 414b at the front end of the loading rod 412 moves forward along the first slot 318 on the outer needle seat 31 and enters the first set of gear bumps 315a, 315b and the second group of gear bumps 316a, 316b of the middle channel 317.
  • the firing slope 417 at the front end of the loading rod 412 pushes the elastic hook 19 outward, causing the elastic hook 19 to disengage from the first group of gear bumps 315a, 315b or the second group of gear bumps. 316a, 316b abut, thereby releasing the buckle. In this way, the outer needle seat 31 is instantly pushed forward under the elastic force of the compressed spring 60, thereby driving the outer needle tube 32 to be fired.
  • the biopsy needle 100 is also provided with a safety buckle 50 .
  • the safety buckle 50 is installed on the needle insertion end formed by the fastening of the upper cover 10 and the base 20, and is used to lock and unlock the forward and backward movement of the inner needle seat 41 in the needle insertion direction to prevent misoperation.
  • the safety buckle 50 has a mounting post 51 , and the mounting post 51 is provided with an axially penetrating inner needle hole 511 for the inner needle bar 42 to pass through.
  • An annular flange 52 is formed on the outer periphery of the mounting column 51.
  • the upper cover 10 and the base 20 are respectively provided with a first arc-shaped groove 181 (see Figure 3) and a third arc-shaped groove 241 (see Figure 8) at the needle entry end, which are fastened together on the upper cover 10 and the base 20. and then together form an annular groove coaxial with the needle inlet.
  • the annular flange 52 of the safety buckle 50 is installed in the annular groove, thereby being restricted from moving backward along the axial direction.
  • the spring 60 is set on the mounting column 51 The contact with the front end surface of the annular flange 52 can restrict the annular flange 52 from moving forward in the axial direction.
  • the annular flange 52 can only move around the first arc groove 181 and the third arc groove 241 .
  • the entire safety catch 50 cannot come out from the needle end.
  • the rear end of the mounting column 51 is provided with a rotation operating portion 53 exposed outside the needle inlet.
  • the rotation operating portion 53 is provided with an operating protrusion 531 and a locking protrusion 532 .
  • the loading rod 412 of the inner needle seat 41 is provided with a first latching slot 415a, a second latching slot 415b and a third latching position respectively corresponding to the initial position, the first snapping position and the second snapping position. Groove 415c (see Figure 6).
  • the operating protrusion 531 of the safety buckle 50 is held in hand to drive the safety buckle 50 to rotate at a certain angle and the locking protrusion 532 is locked into the corresponding first locking slot. 415a (see Figure 13), the inner needle seat 41 can be prevented from moving forward and backward in the needle insertion direction, making it convenient to continue to adjust the direction of the biopsy needle 100 in order to achieve optimal sampling conditions.
  • pull the inner needle seat 41 backward to load the biopsy needle 100 to the first buckle position or the second buckle position and then use the operating protrusion 531 of the hand-held safety buckle 50 to drive the safety buckle 50 to rotate a certain amount.
  • the inner needle seat 41 can be prevented from moving forward and backward in the needle insertion direction, thereby preventing false firing.
  • the rear end of the spring 60 is in contact with the front end surface of the annular flange 52 of the safety buckle 50, the backward force generated by the pressure of the spring 60 pushes against the circular flange 52, causing the annular flange 52 to move in the annular concave position. There is a certain rotational friction force in the groove and it will not rotate freely.
  • the user needs to apply a certain rotational force to the safety buckle 50 by operating the protrusion 531 in order to drive the locking protrusion 532 to snap into the first and second locking grooves 415a and 415a.
  • the second latching slot 415b or the third latching slot 415c is in or comes out of it to ensure that the safety buckle 50 effectively locks the inner needle seat 41.
  • the biopsy needle 100 is provided with a safety buckle 50 that can rotate but cannot move axially at the needle insertion end formed by fastening the upper cover 10 and the base 20.
  • the latching protrusion 532 rotates at a certain angle and then engages in the first latching groove 415a, the second latching groove 415b or the third latching groove 415c on the loading rod 412 of the inner needle holder 41 to lock the inner needle holder 41. Misoperation.
  • the upper cover 10 is provided with a first viewing window 131 and a second viewing window 132 corresponding to the first snapping position and the second snapping position of the outer needle seat 31 , and corresponding to the first snapping position.
  • the window 131 and the second window 132 are respectively provided with a first gear mark 141 and a second mark 142 to facilitate operational distinction and verification.
  • the color of the outer needle seat 31 is displayed in the first window 131 and the second window 132, synchronously.
  • the top of the upper cover 10 can also be provided with a groove 15 for pasting needle-type labels for needle-type specifications of partitioned biopsy needles.
  • two hand-held rings 21 a and 21 b are formed on the left and right sides of the base 20 in the needle insertion direction to facilitate the operation of the biopsy needle 100 .
  • rubber pads 70a and 70b are respectively embedded in the inner peripheries of the two hand-held rings 21a and 21b to enhance the comfort of use.
  • a ring of limiting ribs 211 is protruding from the inner periphery of each hand-held ring 21a, 21b.
  • the ring of limiting ribs 211 forms a gap 212 near the base body, and a strip-shaped protrusion is provided in the gap 212.
  • the rubber pads 70a and 70b have an outer contour that matches the inner periphery of the hand-held rings 21a and 21b, and a groove 71 is provided on the outer circumference thereof for assembly with the limiting ribs 211 of the hand-held rings 21a and 21b to limit the rubber pads 70a and 21b. 70b of up and down movement.
  • the rubber pads 70a and 70b are also provided with openings 72 corresponding to the bar-shaped bosses 213 of the hand-held rings 21a and 21b for the bar-shaped bosses 213 to be inserted, and a wider open groove 73 is formed inside the opening 72 for use with the top. Both sides of the cover 10 are assembled corresponding to the downwardly extending wrapping pieces 12 .
  • the wrapping piece 12 is inserted into the open groove 73 of the rubber pads 70a and 70b to close the open groove 73 (see Figure 1), thereby preventing the rubber pads 70a and 70b from being removed from the hand ring. Falling off in 21a and 21b.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种活检针（100）包括上盖（10）、底座（20）、外针组件（30）和内针组件（40），还在上盖（10）和底座（20）扣合而成的进针端设有保险扣（50），保险扣（50）具有同轴转动安装于进针口的安装柱（51），安装柱（51）开设有沿轴向贯通的内针孔（511）以供内针杆（42）穿过，安装柱（51）的外周与进针口设有相配合以限制安装柱（51）轴向向后移动的后移限位结构，安装柱（51）还设有露在进针口外侧以操作安装柱（51）转动的转动操作部（53），转动操作部（53）设有卡位凸起（532），卡位凸起（532）在转动一角度后可卡入加载杆（412）或导向杆（413）上与至少一个扣合档位相对应的至少一个卡位槽（415a、415b、415c）中的一个卡位槽（415a、415b、415c）内以阻止内针座（41）在进针方向上的前后移动。

Description

一种活检针 技术领域
本申请涉及医疗辅助器械，更具体地说，涉及一种活检针。
背景技术
近几年，肿瘤潜伏在人类身边，且发病率逐渐上升。早期发现、及时治疗可以大大预防肿瘤的病变，这就需要在超声引导下对病灶细胞或组织进行穿刺取样，用于病理分析诊断。穿刺取样要用到的一个非常重要的工具就是活检针，其中比较常用的是半自动活检针。例如，授权公告号为CN213075849U、名称为“一种操纵结构和活检针”的中国实用新型专利便公开了一种半自动活检针。但是，这种半自动活检针的外针座没有充分的上下左右移动限位结构，稳定性较差。而且，这种半自动活检针在使用时通过拉动拉手上膛，然后向前推动拉手进行击发，但是没有设置针对拉手的安全锁定装置，在手术过程中可能导致活检针的误击发。为此，授权公告号为CN113303839A、名称为“半自动活检针的安全锁定装置”的中国发明专利申请便公开了针对拉手的安全锁定装置，在拉手的过渡段通孔内插设锁定件，通过沿通孔移动锁定件可以根据需要对锁定状态和非锁定状态进行切换，锁定状态下拉手的行程会被锁定件阻碍而无法击发。但是，这种插设在壳体外的拉手上的锁定件仍然存在容易脱落的风险，无法有效杜绝活检针的误击发。
发明内容
本申请要解决的技术问题在于，针对现有技术的上述缺陷，提供一种能够有效实现安全锁定而避免误击发的活检针。
本申请解决其技术问题所采用的技术方案是：提出一种活检针，包括上盖、底座、外针组件和内针组件，所述上盖和底座相互扣合包围形成内部空间并在进针端形成进针口、在出针端形成出针口，所述外针组件包括外针座和固定连接于外针座的外针管，所述内针组件包括内针座和固定连接于内针座的内针杆，其中：
所述外针座沿进针方向往复滑动安装于上盖和底座的内部空间中，所述外针座与上盖和底座的内部空间还设有在往复滑动方向上相配合以提供至少一个扣合档位的弹性扣合结构，所述外针管穿过所述出针口伸出；
所述内针杆穿过所述进针口后插设于外针管，所述内针座设有沿与进针方向平行的方向延伸并滑插入上盖和底座的内部空间中的加载杆和导向杆，所述加载杆和导向杆中至少一者与外针座设有相配合以在拉动内针座在进针方向上向后移动的同时带动外针座向后移动的卡合结构，所述加载杆还设有在推动内针座在进针方向上向前移动的过程中解除所述弹性扣合结构的扣合的击发结构；
所述活检针还在上盖和底座扣合而成的进针端设有保险扣，所述保险扣具有同轴转动安装于所述进针口的安装柱，所述安装柱开设有沿轴向贯通的内针孔以供内针杆穿过，所述安装柱的外周与所述进针口设有相配合以限制安装柱轴向向后移动的后移限位结构，所述安装柱还设有露在进针口外侧以操作安装柱转动的转动操作部，所述转动操作部设有卡位凸起在转动一角度后可卡入所述加载杆和导向杆中至少一者上开设的与所述至少一个扣合档位相对应的至少一个卡位槽中的一个卡位槽内以阻止内针座在进针方向上的前后移动；
所述外针座与所述保险扣之间还抵接一在进针方向上弹性变形的弹性件，所述弹性件在拉动内针座同时带动外针座向后移动至所述弹性扣合结构扣合于一个扣合档位时被压缩，所述弹性件在推动内针座向前移动至解除所述弹性扣合结构的扣合时弹性复位带动外针管被击发。
根据本申请所述的活检针的一个实施例中，所述安装柱的外周与所述进针端之间设置的后移限位结构包括形成于所述安装柱的外周的环形凸缘和进针端的上盖和底座共同开设围成的环形凹槽，所述环形凸缘安装于所述环形凹槽内以限制安装柱轴向向后移动。
根据本申请所述的活检针的一个实施例中，所述弹性件为弹簧，所述弹簧的后端套设于所述安装柱上与所述环凸缘的前端面相抵，所述弹簧的前端安装于外针座开设的弹簧安装孔内。
根据本申请所述的活检针的一个实施例中，所述外针座在进针方向上的第一侧开设第一卡槽，在进针方向上的第二侧开设第二卡槽，所述内针座的加载杆和导向杆的前端分别设有向所述第一卡槽和第二卡槽凸伸的第一凸台和第二凸台，所述第一凸台和第二凸台分别置入所述第一卡槽和第二卡槽内构成卡合结构；拉动内针座向后移动至所述第一凸台和第二凸台分别与所述第一卡槽和第二卡槽的前端相抵时带动外针座一起向后移动。
根据本申请所述的活检针的一个实施例中，所述外针座在进针方向上的第一侧所述第一卡槽的前部相对凸伸出与所述至少一个扣合档位相对应的至少一组档位凸块，所述上盖的与外针座的第一侧相对应的内侧壁形成一弹性卡勾，所述弹性卡勾与所述至少一组档位凸块相配合以构成所述弹性扣合结构。
根据本申请所述的活检针的一个实施例中，所述内针座的加载杆的击发结构为形成于所述加载杆前端的第一凸台的远离外针座的另一侧的击发斜面；推动内针座向前移动的过程中所述加载杆前端的第一凸台从所述至少一组档位凸块中每组档位凸块的中间通道通过，所述加载杆前端的击发斜面向外推挤所述弹性卡勾以解除弹性卡勾与档位凸块的扣合。
根据本申请所述的活检针的一个实施例中，所述导向杆和加载杆前端上部设置有导向凸筋，所述导向凸筋分别滑设于所述上盖内侧顶部对应形成的导向滑槽内。
根据本申请所述的活检针的一个实施例中，所述外针座在进针方向上的顶部设有上限位块，所述上限位块具有第一限位顶面、第一限位左侧面和第一限位右侧面，所述上盖的内侧顶部开设有用于安装所述上限位块的上限位滑槽，所述上限位滑槽具有与所述上限位块的第一限位顶面抵接配合的第二限位顶面已经与所述上限位块的第一限位左侧面和第一限位右侧面分别抵接配合的上限位滑槽左侧面和上限位滑槽右侧面；所述外针座在进针方向上的底部设有下限位块，所述下限位块具有第一限位底面、第二限位左侧面和第二限位右侧面，所述底座开设有用于安装所述下限位块的下限位滑槽，所述下限位滑槽具有与所述下限位块的第一限位底面抵接配合的第二限位底面以及与所述下限位块的第二限位左侧面和第二限位右侧面分别抵接配合的下限位滑槽左侧面和下限位滑槽右侧面。
根据本申请所述的活检针的一个实施例中，所述上盖开设有与所述外针座的至少一个扣合档位相对应的至少一个视窗，并对应每个视窗设置档位标识。
根据本申请所述的活检针的一个实施例中，所述底座在进针方向上的左右两侧还分别形成手持环，所述手持环的内周嵌装橡胶护垫。
实施本申请的活检针，具有以下有益效果：根据本申请实施例的活检针在上盖和底座扣合而成的进针端设置可以转动但不可以轴向移动的保险扣，通过保险扣的转动操作部上的卡位凸起转动一定角度后卡入内针座的加载杆或导向杆上的卡位槽中将内针座锁定，从而防止误击发，反向转动该保险扣使卡位凸起从卡位槽中脱出便可解除对内针座的锁定。由于保险扣限位在上盖和底座扣合而成的进针端不能轴向移动，便不存在脱落的风险，有效实现活检针的安全锁定。此外，根据本申请实施例的活检针还可通过上盖和底座的扣合使得外针座仅能轴向移动，不能上下左右移动，从而提高活检针的稳定性。
附图说明
下面将结合附图及实施例对本申请作进一步说明，附图中：
图1是本申请一个实施例的活检针的整体结构示意图；
图2是图1所示的活检针的分解结构示意图；
图3是本申请一个实施例的上盖的结构示意图；
图4是本申请一个实施例的外针组件的结构示意图；
图5是图4所示的外针组件的另一个角度的结构示意图；
图6是本申请一个实施例的内针组件的结构示意图；
图7是本申请一个实施例的保险扣的结构示意图；
图8是本申请一个实施例的底座的结构示意图；
图9是本申请一个实施例的活检针处于初始状态的结构剖视图；
图10是图9所示的活检针处于第一扣合档位状态的结构剖视图；
图11是图9所示的活检针处于第二扣合档位状态的结构剖视图；
图12是本申请一个实施例中的保险扣处于初始状态的结构剖视图；
图13是图12所示的保险扣处于锁定状态的结构剖视图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。并且，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
图1和图2分别示出了根据本申请一个实施例的活检针100的整体结构和分解结构示意图。如图1和图2所示，活检针100主要由上盖10、底座20、外针组件30、内针组件40、保险扣50和弹簧60构成。上盖10和底座20相互扣合包围形成内部空间并在进针端形成进针口(图1中不可见)，在出针端形成出针口80(参见图1所示)。具体如图2并结合图3和图8所示，上盖10在进针方向上的左右两侧分别向下伸出两个卡扣111和112，在进针方向上的前端左右两侧设有向下凸伸的安装导向定位柱182a和182b；对应地，底座20的左右两侧对应开设有与卡扣111和112卡扣配合的卡槽221和222，和供安装导向定位柱182a和182b插置的安装导向定位孔242a和242b。将上盖10的两个安装导向定位柱182a和182b插入底座20的两个安装导向定位孔242a和242b，并将上盖10两侧的卡扣111和112卡入底座20两侧的卡槽221和222内，便可将上盖10和底座20扣合。外针组件30包括外针座31和固定连接于外针座31的外针管32。外针座31沿进针方向往复滑动安装于上盖10和底座20的内部空间中，外针管32穿过出针口80伸出。内针组件40包括内针座41和固定连接于内针座41的内针杆42，内针杆42穿过进针口 后插设于外针管32中。内针杆42的前端开设有取样槽421。保险扣50安装在上盖10和底座20扣合而成的进针端，用于对内针座41在进针方向上的前后移动进行锁定和解锁。弹簧60抵接于外针座31与保险扣50之间以提供进针方向上的弹性变形。
具体结合图3、图4、图5和图8所示，外针座31在进针方向上的顶部设有上限位块311，上限位块311具有第一限位顶面3113、第一限位左侧面3111和第一限位右侧面3112。对应地，上盖10的内侧顶部开设有用于安装上限位块311的上限位滑槽17，上限位滑槽17具有第二限位顶面173、上限位滑槽左侧面171和上限位滑槽右侧面172。当上盖10与底座20扣合后，上限位滑槽17的第二限位顶面173与上限位块311的第一限位顶面3113抵接配合，上限位滑槽17的上限位滑槽左侧面171和上限位滑槽右侧面172分别与上限位块311的第一限位左侧面3111和第一限位右侧面3112抵接配合。此外，外针座31在进针方向上的底部设有下限位块313，下限位块313具有第一限位底面3133、第二限位左侧面3131和第二限位右侧面3132。对应地，底座40上开设有用于安装下限位块313的下限位滑槽25。当上盖10与底座20扣合后，下限位滑槽25的第二限位底面253与下限位块313的第一限位底面3133抵接配合，下限位滑槽25的下限位滑槽左侧面251和下限位滑槽右侧面252分别与下限位块313的第二限位左侧面3131和第二限位右侧面3132抵接配合。如此，外针座30在上盖10和底座20扣合而成的内部空间中只能沿进针方向前后往复滑动，不能上下左右移动，确保活检针100在上膛和击发过程中都非常稳定。
再结合图3和图8所示，上盖10在出针端设有第一T形半柱状凹槽16，底座20在出针端设有第二T形半柱状凹槽23，上盖10和底座20扣合后二者在出针口80包围出一个T形柱状空间，其内安装T形柱状件321以引导外针组件30的外针管32穿出，保证穿刺的同轴度。同时，上盖10在进针端设有彼此连通的第一弧形凹槽181和第二弧形凹槽183，底座20在进针端对应第一弧形凹槽181设有第三弧形凹槽241，上盖10和底座20扣合后包围出一个进针口，用于安装保险扣50以供内针组件40的内针杆42穿入。
再参见图4所示，外针座31开设有在进针方向上从后端向前端延伸的弹簧安装孔312，用于安装弹簧60，弹簧60的前端与弹簧安装孔312的前端面相抵接。再参见图9所示，弹簧60的后端套设在保险扣50的安装柱51上与环形凸缘52的前端面相抵接。如此，当外针座30在上盖10和底座20扣合而成的内部空间中向后滑动时，弹簧60被压缩。
再参见图4和图5所示，外针座31在进针方向上的第一侧(即右侧)开设有沿进针方向延伸的第一卡槽318，在进针方向上的第二侧(即左侧)开设有沿进针方向延伸的第二卡槽314，该第一卡槽318和第二卡槽314用于分别与内针座41上的第一凸台414b和 第二凸台414a配合以带动外针座31随内针座41一起向后移动。并且，外针座31在进针方向上的第一侧(即右侧)还在第二卡槽318的前部相对凸伸出第一组档位凸块315a和315b以及第二组档位凸块316a和316b，第一组两个档位凸块315a和315b之间以及第二组两个档位凸块316a和316b之间形成与第二卡槽318正对的通道317。该第一组档位凸块315a、315b和第二组档位凸块316a、316b分别对应于外针座31从初始状态向后移动的两个行程，也即活检针100的两个扣合档位。再参见图3所示，上盖10的与外针座31的第一侧(即右侧)相对应的内侧壁形成一弹性卡勾19。该弹性卡勾19可在外针座31相对于上盖10向后移动的过程中越过第一组档位凸块315a、315b或第二组档位凸块316a、316b后与第一组档位凸块315a、315b或第二组档位凸块316a、316b相抵限位，以阻止外针座31向前移动，确保外针座31处于第一组档位凸块315a、315b或第二组档位凸块316a、316b所对应的第一扣合档位或第二扣合档位上。如此，外针座31在上盖10和底座20扣合而成的内部空间中便通过弹性卡勾19与第一组档位凸块315a、315b和第二组档位凸块316a、316b构成的弹性扣合结构实现往复滑动方向上的两个扣合档位设计。
再参见图6所示，内针座41包括手持部411，内针杆42与手持部411固定连接。内针座41还从手持部411的前端沿与进针方向(亦即内针管42的轴向)平行的方向延伸出导向杆413和加载杆412，导向杆413和加载杆412分设于内针管42的左右两侧。上盖10亦在进针口的左右两侧对应开设有第一导向槽185和第二导向槽184，以供内针座41的加载杆412和导向杆413插入，为内针座41的前后移动提供导向作用。进一步如图6所示，加载杆412的前端设有向外针座31右侧的第一卡槽318内凸伸的第一凸台414b，导向杆413的前端设有向外针座31左侧的第二卡槽314内凸伸的第二凸台414a。第一凸台414b和第二凸台414a分别置入第一卡槽318和第二卡槽314内与第一卡槽318的后端面3181和第二卡槽314的后端面3141相抵，便构成可以在拉动内针座41在进针方向上向后移动的同时带动外针座31向后移动的卡合结构。同时，导向杆413和加载杆412前端上部设置有导向凸筋416a和416b，导向凸筋416a和416b分别滑设于上盖10内侧顶部形成的导向滑槽186a和186b内，可以为内针座41的前后移动提供进一步的导向作用，减小内针座41拉出加载后的晃动，增强活检针100的稳定性。同时，导向凸筋416a和416b与导向滑槽186a和186b的配合还能防止内针座41从后端完全被拉出。进一步，加载杆412前端的第一凸台414b的远离外针座31的另一侧形成击发斜面417。推动内针座41向前移动的过程中，加载杆412前端的第一凸台414b沿外针座31上的第一卡槽318进入第一组档位凸块315a、315b和第二组档位凸块316a、316b的中间通道317并可从通道317通过，同时，加载杆412前端的击发斜面417可向外推挤弹性卡勾19，使弹性卡 勾19脱离与第一组档位凸块315a、315b或第二组档位凸块316a、316b的抵接，从而解除弹性卡勾19与第一组档位凸块315a、315b或第二组档位凸块316a、316b的扣合。这样，外针座31便可在被压缩的弹簧60的弹力作用下被瞬间向前推，从而带动外针管32被击发，刺入目标位置。根据本申请的不同实施例中，击发斜面417也可以用其它能同样在推动内针座41向前移动的过程中解除弹性扣合结构的扣合的击发结构来代替。
以下结合图9、图10和图11详细介绍根据本申请一个实施例的活检针的上膛和击发的具体实现过程：首先如图9所示的初始状态下，上盖10的弹性卡勾19位于外针座31的第一组档位凸块315a、315b的后方，弹簧60处于初始状态，内针座41的加载杆412和导向杆413前端的第一凸台414b和第二凸台414a伸入外针座31的第一卡槽318和第二卡槽314内与分别与第一卡槽318和第二卡槽314的后端面抵接。然后如图10所示，向后拉动内针座41的手持部411，通过加载杆412和导向杆413前端的第一凸台414b和第二凸台414a与第一卡槽318和第二卡槽314后端面的抵接同时带动外针座31向后移动进行上膛操作，弹簧60被逐渐压缩。当外针座31向后移动至弹性卡勾19越过第一组档位凸块315a、315b时，弹性卡勾19与第一组档位凸块315a、315b相扣合，阻止外针座31在弹簧60的弹力作用下向前移动。此时，活检针100处于上膛的第一扣合档位。然后如图11所示，继续向后拉动内针座41的手持部411，通过加载杆412和导向杆413前端的第一凸台414b和第二凸台414a与第一卡槽318和第二卡槽314后端面的抵接同时带动外针座31继续向后移动，弹簧60进一步被压缩。当外针座31向后移动至弹性卡勾19越过第二组档位凸块316a、316b时，弹性卡勾19与第二组档位凸块316a、316b相扣合，阻止外针座31在弹簧60的弹力作用下向前移动。此时，活检针100处于上膛的第二扣合档位。手术中需要击发活检针100时，无论活检针100是处于图10所示的第一扣合档位，还是处于图11所示的第二扣合档位，向前推动内针座41的手持部411，使加载杆412前端的第一凸台414b沿外针座31上的第一卡槽318向前移动进入第一组档位凸块315a、315b和第二组档位凸块316a、316b的中间通道317，同时，加载杆412前端的击发斜面417向外推挤弹性卡勾19，使弹性卡勾19脱离与第一组档位凸块315a、315b或第二组档位凸块316a、316b的抵接，从而解除扣合，这样，外针座31便在被压缩的弹簧60的弹力作用下被瞬间向前推，从而带动外针管32被击发。
进一步参见图1和图7所示，活检针100还设有保险扣50。保险扣50安装在上盖10和底座20扣合而成的进针端，用于对内针座41在进针方向上的前后移动进行锁定和解锁，以防误操作。具体如图7所示，保险扣50具有安装柱51，安装柱51开设有沿轴向贯通的内针孔511以供内针杆42穿过。安装柱51的外周形成有环形凸缘52，对应地， 上盖10和底座20分别在进针端开设有第一弧形凹槽181(参见图3)和第三弧形凹槽241(参见图8)，二者在上盖10和底座20扣合后共同围成与进针口同轴的环形凹槽，保险扣50的环形凸缘52安装于该环形凹槽内，从而被限制沿轴向向后移动，同时弹簧60套设在安装柱51上与环形凸缘52的前端面相抵接能限制环形凸缘52沿轴向向前移动，如此，环形凸缘52便只能在第一弧形凹槽181和第三弧形凹槽241围成的环形凹槽内绕轴向转动，整个保险扣50便不能从进针端脱出。再如图7所示，安装柱51的后端设有露在进针口外侧的转动操作部53，转动操作部53上设有操作凸起531和卡位凸起532。同时，内针座41的加载杆412上对应于初始位置、第一扣合档位和第二扣合档位分别开设有第一卡位槽415a、第二卡位槽415b和第三卡位槽415c(参见图6所示)。活检针100在插入病灶位置处于图9所示的初始状态下时，通过手持保险扣50的操作凸起531带动保险扣50转动一定角度将卡位凸起532卡入对应的第一卡位槽415a内(参见图13所示)，便可阻止内针座41在进针方向上的前后移动，方便继续调整活检针100的方向，以便达到最佳状态下取样。活检针100上膛时，向后拉动内针座41使活检针100上膛至第一扣合档位或第二扣合档位后，通过手持保险扣50的操作凸起531带动保险扣50转动一定角度将卡位凸起532卡入对应的第二卡位槽415b或第三卡位槽415c内，便可阻止内针座41在进针方向上的前后移动，防止出现误击发。此外，由于弹簧60的后端抵接于保险扣50的环形凸缘52的前端面，弹簧60受压产生的向后的作用力推抵圆形凸缘52，使环形凸缘52在环形凹槽内具有一定的转动摩擦力，不会自由转动，需要使用者通过操作凸起531向保险扣50施加一定的转动作用力，才能带动卡位凸起532卡入第一卡位槽415a、第二卡位槽415b或第三卡位槽415c内或从中脱出，确保保险扣50将内针座41有效锁定。
根据本申请上述实施例的活检针100在上盖10和底座20扣合而成的进针端设置可以转动但不可以轴向移动的保险扣50，通过保险扣50的转动操作部53上的卡位凸起532转动一定角度后卡入内针座41的加载杆412上的第一卡位槽415a、第二卡位槽415b或第三卡位槽415c中将内针座41锁定，从而防止误操作。反向转动该保险扣50使卡位凸起532从第一卡位槽415a、第二卡位槽415b或第三卡位槽415c中脱出便可解除对内针座41的锁定。由于保险扣50限位在上盖10和底座20扣合而成的进针端不能轴向移动，便不存在脱落的风险，有效实现活检针100的安全锁定。
进一步地，参见图2所示，上盖10开设有与外针座31的第一扣合档位和第二扣合档位相对应的第一视窗131和第二视窗132，并对应第一视窗131和第二视窗132分别设置第一档位标识141和第二标识142，以便于操作区分和核对。例如，通过外针座31相对于上盖10的移动，外针座31的颜色在第一视窗131和第二视窗132中显示出来，同步 对应加载的扣合档位。上盖10的顶部还可设置凹槽15，用于粘贴针型标签，用于分区活检针的针型规格。
进一步地，参见图2和图8所示，底座20在进针方向上的左右两侧还形成两个手持环21a和21b，以方便操作活检针100。并且，两个手持环21a和21b的内周分别嵌装橡胶护垫70a和70b，以增强使用的舒适度。具体如图8所示，每个手持环21a、21b的内周凸设一圈限位筋211，该一圈限位筋211在靠近底座本体的部分形成缺口212，并在缺口212中设置条形凸台213。橡胶护垫70a、70b具有与手持环21a、21b内周相配合的外形轮廓，其外周开设一圈凹槽71用于和手持环21a、21b的限位筋211装配，限制橡胶护垫70a、70b的上下移动。橡胶护垫70a、70b还对应手持环21a、21b的条形凸台213设置开口72以供条形凸台213插装，并在开口72的内侧形成更宽的开放槽73，用于和上盖10的两侧对应向下伸出的包裹片12装配。当上盖10和底座20扣合后，包裹片12插入橡胶护垫70a、70b的开放槽73内将开放槽73封闭(参见图1所示)，从而防止橡胶护垫70a、70b从手持环21a、21b中脱落。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种活检针，包括上盖、底座、外针组件和内针组件，所述上盖和底座相互结合包围形成内部空间并在进针端形成进针口、在出针端形成出针口，所述外针组件包括外针座和固定连接于外针座的外针管，所述内针组件包括内针座和固定连接于内针座的内针杆，其特征在于：
    所述外针座沿进针方向往复滑动安装于上盖和底座的内部空间中，所述外针座与上盖和底座的内部空间还设有在往复滑动方向上相配合以提供至少一个扣合档位的弹性扣合结构，所述外针管穿过所述出针口伸出；
    所述内针杆穿过所述进针口后插设于外针管，所述内针座设有沿与进针方向平行的方向延伸并滑插入上盖和底座的内部空间中的加载杆和导向杆，所述加载杆和导向杆中至少一者与外针座设有相配合以在拉动内针座在进针方向上向后移动的同时带动外针座向后移动的卡合结构，所述加载杆还设有在推动内针座在进针方向上向前移动的过程中解除所述弹性扣合结构的扣合的击发结构；
    所述活检针还在上盖和底座扣合而成的进针端设有保险扣，所述保险扣具有同轴转动安装于所述进针口的安装柱，所述安装柱开设有沿轴向贯通的内针孔以供内针杆穿过，所述安装柱的外周与所述进针口设有相配合以限制安装柱轴向向后移动的后移限位结构，所述安装柱还设有露在进针口外侧以操作安装柱转动的转动操作部，所述转动操作部设有卡位凸起在转动一角度后可卡入所述加载杆和导向杆中至少一者上开设的与所述至少一个扣合档位相对应的至少一个卡位槽中的一个卡位槽内以阻止内针座在进针方向上的前后移动；
    所述外针座与所述保险扣之间还抵接一在进针方向上弹性变形的弹性件，所述弹性件在拉动内针座同时带动外针座向后移动至所述弹性扣合结构扣合于一个扣合档位时被压缩，所述弹性件在推动内针座向前移动至解除所述弹性扣合结构的扣合时弹性复位带动外针管被击发。
  2. 根据权利要求1所述的活检针，其特征在于，所述安装柱的外周与所述进针端之间设置的后移限位结构包括形成于所述安装柱的外周的环形凸缘和进针端的上盖和底座共同开设围成的环形凹槽，所述环形凸缘安装于所述环形凹槽内以限制安装柱轴向向后移动。
  3. 根据权利要求2所述的活检针，其特征在于，所述弹性件为弹簧，所述弹簧的后端套设于所述安装柱上与所述环凸缘的前端面相抵，所述弹簧的前端安装于外针座开设的 弹簧安装孔内。
  4. 根据权利要求1所述的活检针，其特征在于，所述外针座在进针方向上的第一侧开设第一卡槽，在进针方向上的第二侧开设第二卡槽，所述内针座的加载杆和导向杆的前端分别设有向所述第一卡槽和第二卡槽凸伸的第一凸台和第二凸台，所述第一凸台和第二凸台分别置入所述第一卡槽和第二卡槽内构成卡合结构；拉动内针座向后移动至所述第一凸台和第二凸台分别与所述第一卡槽和第二卡槽的前端相抵时带动外针座一起向后移动。
  5. 根据权利要求4所述的活检针，其特征在于，所述外针座在进针方向上的第一侧所述第一卡槽的前部相对凸伸出与所述至少一个扣合档位相对应的至少一组档位凸块，所述上盖的与外针座的第一侧相对应的内侧壁形成一弹性卡勾，所述弹性卡勾与所述至少一组档位凸块相配合以构成所述弹性扣合结构。
  6. 根据权利要求5所述的活检针，其特征在于，所述内针座的加载杆的击发结构为形成于所述加载杆前端的第一凸台的远离外针座的另一侧的击发斜面；推动内针座向前移动的过程中所述加载杆前端的第一凸台从所述至少一组档位凸块中每组档位凸块的中间通道通过，所述加载杆前端的击发斜面向外推挤所述弹性卡勾以解除弹性卡勾与档位凸块的扣合。
  7. 根据权利要求6所述的活检针，其特征在于，所述导向杆和加载杆前端上部设置有导向凸筋，所述导向凸筋分别滑设于所述上盖内侧顶部对应形成的导向滑槽内。
  8. 根据权利要求1所述的活检针，其特征在于，所述外针座在进针方向上的顶部设有上限位块，所述上限位块具有第一限位顶面、第一限位左侧面和第一限位右侧面，所述上盖的内侧顶部开设有用于安装所述上限位块的上限位滑槽，所述上限位滑槽具有与所述上限位块的第一限位顶面抵接配合的第二限位顶面已经与所述上限位块的第一限位左侧面和第一限位右侧面分别抵接配合的上限位滑槽左侧面和上限位滑槽右侧面；所述外针座在进针方向上的底部设有下限位块，所述下限位块具有第一限位底面、第二限位左侧面和第二限位右侧面，所述底座开设有用于安装所述下限位块的下限位滑槽，所述下限位滑槽具有与所述下限位块的第一限位底面抵接配合的第二限位底面以及与所述下限位块的第二限位左侧面和第二限位右侧面分别抵接配合的下限位滑槽左侧面和下限位滑槽右侧面。
  9. 根据权利要求1所述的活检针，其特征在于，所述上盖开设有与所述外针座的至少一个扣合档位相对应的至少一个视窗，并对应每个视窗设置档位标识。
  10. 根据权利要求1所述的活检针，其特征在于，所述底座在进针方向上的左右两侧还分别形成手持环，所述手持环的内周嵌装橡胶护垫。
PCT/CN2023/093887 2022-07-11 2023-05-12 一种活检针 WO2024012037A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210818262.3 2022-07-11
CN202210818262.3A CN115211905A (zh) 2022-07-11 2022-07-11 一种活检针

Publications (1)

Publication Number Publication Date
WO2024012037A1 true WO2024012037A1 (zh) 2024-01-18

Family

ID=83612804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/093887 WO2024012037A1 (zh) 2022-07-11 2023-05-12 一种活检针

Country Status (2)

Country Link
CN (1) CN115211905A (zh)
WO (1) WO2024012037A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115211905A (zh) * 2022-07-11 2022-10-21 经方精密医疗（深圳）有限公司 一种活检针

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120130276A1 (en) * 2009-08-12 2012-05-24 Coloplast A/S Reusable biopsy gun and a lockable biopsy needle for use therewith
CN103315778A (zh) * 2013-06-26 2013-09-25 德迈特医学技术（北京）有限公司 活检装置
CN111067578A (zh) * 2020-01-17 2020-04-28 普昂(杭州)医疗科技有限公司 一种安全穿刺的活检装置
CN111358506A (zh) * 2020-04-13 2020-07-03 苏州市立普医疗科技有限公司 一种一次性细胞学活检针
CN213075849U (zh) * 2020-06-30 2021-04-30 南京康友医疗科技有限公司 一种操纵结构和活检针
CN113288235A (zh) * 2021-06-17 2021-08-24 常州市新能源吻合器总厂有限公司 一种具有保险结构的全自动活检针
CN113925543A (zh) * 2021-11-11 2022-01-14 湖南拓界医疗科技有限公司 一种新型半自动活检装置
CN215778266U (zh) * 2021-01-27 2022-02-11 马驰自动化科技（苏州）有限公司 一种医用活检针
CN115211905A (zh) * 2022-07-11 2022-10-21 经方精密医疗（深圳）有限公司 一种活检针

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120130276A1 (en) * 2009-08-12 2012-05-24 Coloplast A/S Reusable biopsy gun and a lockable biopsy needle for use therewith
CN103315778A (zh) * 2013-06-26 2013-09-25 德迈特医学技术（北京）有限公司 活检装置
CN111067578A (zh) * 2020-01-17 2020-04-28 普昂(杭州)医疗科技有限公司 一种安全穿刺的活检装置
CN111358506A (zh) * 2020-04-13 2020-07-03 苏州市立普医疗科技有限公司 一种一次性细胞学活检针
CN213075849U (zh) * 2020-06-30 2021-04-30 南京康友医疗科技有限公司 一种操纵结构和活检针
CN215778266U (zh) * 2021-01-27 2022-02-11 马驰自动化科技（苏州）有限公司 一种医用活检针
CN113288235A (zh) * 2021-06-17 2021-08-24 常州市新能源吻合器总厂有限公司 一种具有保险结构的全自动活检针
CN113925543A (zh) * 2021-11-11 2022-01-14 湖南拓界医疗科技有限公司 一种新型半自动活检装置
CN115211905A (zh) * 2022-07-11 2022-10-21 经方精密医疗（深圳）有限公司 一种活检针

Also Published As

Publication number Publication date
CN115211905A (zh) 2022-10-21

Similar Documents

Publication Publication Date Title
WO2024012037A1 (zh) 一种活检针
US11266208B2 (en) Male buckling component for magnetic buckling assembly
EP1285674B1 (en) A non-dosing cartridge for an injection device
JP5833229B2 (ja) 低コストの単回使用注射器
WO2018113511A1 (zh) 注液防护装置、雾化器及电子烟
GB2414398A (en) Injection Device.
JP3226131U (ja) プルバックル
WO2019061420A1 (zh) 安全针头及安全针头装置
US20200030540A1 (en) Auto-injector
CN111436951A (zh) 采血针
CN113476044B (zh) 安全采血针
KR101593118B1 (ko) 차량의 연료주입구 도어 잠금장치
US20060084913A1 (en) Safety syringe with needle orienting mechanism
JPH09215694A (ja) 回転可能な耳刺し通しカートリッジ組立体
US20230076297A1 (en) Injection device
CN217090331U (zh) 一种用于压力锅盖的安全锁结构和具有此结构的压力锅
CN221577649U (zh) 锁定机构和内窥镜
US20230109255A1 (en) Needle assembly with extending safety shield
US20240285856A1 (en) Auto-Injector With Motor Body and Cassette Body
WO2023059927A1 (en) Needle assembly with extending safety shield
SK68198A3 (en) Connection device between a vacuum cleaner and a suction hose
JP4154192B2 (ja) 引違い戸用錠
TW201914635A (zh) 安全針頭及安全針頭裝置
WO2023151957A1 (en) Rotator for a medicament delivery device
JPH0537294Y2 (zh)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23838532

Country of ref document: EP

Kind code of ref document: A1