WO2023165031A1

WO2023165031A1 - Biopsy gun

Info

Publication number: WO2023165031A1
Application number: PCT/CN2022/094628
Authority: WO
Inventors: 王雲涛; 张婵娟
Original assignee: 浙江伽奈维医疗科技有限公司
Priority date: 2022-03-02
Filing date: 2022-05-24
Publication date: 2023-09-07
Also published as: CN114533145A; CN114533145B

Abstract

Provided is a biopsy gun (100), comprising a housing (1), a push member (2), and a safety lock mechanism (A). The safety lock mechanism (A) comprises a rotating member (3) slidably arranged in a circumferential direction of the housing (1), and a positioning part (IV) arranged on the housing (1). The rotating member (3) comprises a stop part (31), one of the stop part (31) and the positioning part (IV) is provided with a locking positioning hole (41), and the other one is provided with an elastic protuberance (321). When the elastic protuberance (321) is stuck into the locking positioning hole (41), the stop part (31) maintains relative positioning with the housing (1). The rotating member (3) comprises an unlocking position (I) and a locking position (II).

Description

a biopsy gun

related application

This application claims the priority of the Chinese patent application filed on March 2, 2022 with the application number 202210198466.1 and the title of the invention "a biopsy gun", the entire content of which is incorporated in this application by reference.

technical field

The application relates to the technical field of medical devices, in particular to a biopsy gun.

Background technique

In cancer treatment, pathological diagnosis plays a key role in the selection of treatment options, and biopsy is the main way to obtain pathological diagnosis results, and biopsy guns are mainly required for biopsy. Biopsy guns, also known as biopsy needles, are mainly used for puncture sampling.

A biopsy gun in the related art includes an outer sleeve assembly, a cutting tube assembly, an inner core needle and a handle assembly, the outer sleeve assembly includes an outer sleeve and an outer sleeve holder, and the cutting tube assembly includes a cutting tube and a cutting tube holder , the inner core needle is fixedly installed on the handle assembly, the upper shell and the lower shell form the inner cavity of the handle, a first step is arranged in the inner cavity of the handle, and a cutting tube fixing part is arranged in the inner cavity of the handle to drive the outer tube fixing part The chute moves back and forth, and a push handle is arranged outside the inner cavity of the handle.

The amount of tissue taken out by the above-mentioned biopsy gun at one time is equivalent to more than twice that of the traditional semicircular cutting groove, and the amount taken out is thicker, which ensures the accuracy of pathological analysis.

However, the above-mentioned biopsy gun mainly relies on pushing the push handle along the axial direction of the biopsy gun to realize the firing action of the biopsy gun. Although the operation is simple, the push handle can slide freely on the biopsy gun, so it is easy to touch the push handle by mistake. Cause the biopsy gun to fire, causing unnecessary damage to the patient, so it remains to be improved.

Contents of the invention

According to various embodiments of the present application, a biopsy gun is provided.

This application provides the following technical solutions:

A biopsy gun, comprising a housing, and a pusher arranged on the housing to slide axially along the housing to control the firing action of the biopsy gun. When the pusher is pushed to the firing position, the biopsy gun performs the firing action. The biopsy gun also includes a safety lock mechanism, the safety lock mechanism includes a rotating member slidingly arranged along the circumferential direction of the housing, and a positioning part provided on the housing, the rotating member includes a stopper, and the stopper part and positioning part, one of which is provided with a locking positioning hole, and the other is provided with an elastic protrusion, when the elastic protrusion snaps into the locking positioning hole, the stopper part and the housing remain relatively positioned; the rotation The component includes an unlocked position and a locked position. In the locked position, the stopper rotates to the advancing path of the pusher to limit the pusher from reaching the firing position, and the elastic protrusion snaps into the locking positioning hole; in the unlocked position, The stop portion forms an escape on the advancement path of the pusher.

In one embodiment, the biopsy gun further includes a cutting tube fixing part and an outer tube fixing part which are respectively arranged in the housing to slide along the axial direction of the housing, and the cutting tube fixing part is used to fix the cutting tube of the biopsy gun to Drive the cutting tube to move, and the outer tube fixing part is used to fix the outer tube of the biopsy gun to drive the outer tube to move; there is also a cutting tube fixing part and the outer tube fixing part between the cutting tube fixing part and the outer tube fixing part The sliding part against which the fixing part is located; the sliding part is slidably arranged in the casing along the axial direction of the casing, and the sliding part is slidably connected with the cutting pipe in the axial direction.

In one embodiment, the elastic protrusion is disposed on the stopper portion, and the locking positioning hole is disposed on the positioning portion.

In one embodiment, the positioning part is further provided with an unlocking positioning hole, and the unlocking positioning hole and the locking positioning hole are arranged at intervals along the rotation direction of the stopper part. In the unlocked position, the elastic protrusion snaps into the unlocking positioning hole Keep the stopper and the housing relatively positioned.

In one embodiment, the stopper has an arc-shaped structure, and a chute arranged along the circumference of the casing is provided on the outer peripheral wall of the casing, and the stopper is arranged in the chute along the circumference of the chute. in the locked position, at least part of the stop part protrudes out of the chute to block the pusher.

In one embodiment, the stop part is provided with an elastic arm whose end is relatively fixed to the stop part, and the space between the elastic arm and the stop part is arranged to form a space for the deformation of the elastic arm; the elastic protrusion It is set on the inner side of the other end of the elastic arm.

In one embodiment, the stop part is further provided with a rotating handle for assisting in rotating the stop part, and a space for the elastic arm to deform is provided between the elastic arm and the rotating handle.

In one embodiment, the positioning part includes a shell fixedly sleeved on the shell, the shell and the shell are spaced apart to form a sandwich space, the stopper slides in the sandwich space, and the The turning handle and the elastic arm are located on the outer side of the casing; the casing is provided with an avoidance opening for the movement of the connecting part of the turning handle and the stopper.

In one embodiment, the biopsy gun further includes a sheath tube detachably installed at the front end of the biopsy gun, and the core needle, the outer cannula, and the cutting tube are all located inside the sheath tube.

In one embodiment, one end of the sheath tube is fixed with a clamping piece, and the opposite sides of the clamping piece are bent outwards to form chucks, and the end of the biopsy gun is respectively provided with The clamping part is clamped in the clamping slot to realize the fixing of the sheath tube and the biopsy gun, and the side of the clamping part opposite to the clamping head is bent outward to form a force part for manual pressing.

Other advantages and effects of the present application are explained in detail in the specific embodiment section.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will be apparent from the description, drawings and claims.

Description of drawings

In order to better describe and illustrate embodiments and/or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. Additional details or examples used to describe the drawings should not be considered limitations on the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode of these inventions currently understood.

Fig. 1 is a schematic diagram of the overall structure of a biopsy gun according to one or more embodiments.

Figure 2 is a cross-sectional view of a biopsy gun according to one or more embodiments.

Fig. 3 is a schematic structural view of a cutting pipe fixing member according to one or more embodiments.

Fig. 4 is a schematic structural diagram of a pusher according to one or more embodiments.

Fig. 5 is a schematic structural view of an overtube fixing member according to one or more embodiments.

Fig. 6 is a schematic structural diagram of a shift member according to one or more embodiments.

Fig. 7 is a schematic structural diagram of a slider according to one or more embodiments.

Fig. 8 is a schematic diagram of the internal structure of a biopsy gun according to one or more embodiments.

FIG. 9 is an enlarged view of part A in FIG. 1 .

Fig. 10 is a schematic diagram of the structure of a biopsy gun according to one or more embodiments with the housing removed.

Fig. 11 is a schematic structural diagram of a rotating member according to one or more embodiments.

12 is a flow diagram of switching a safety lock mechanism from an unlocked position to a locked position, according to one or more embodiments.

Fig. 13 is an enlarged view of part B in Fig. 1 .

FIG. 14 is a schematic diagram of the structure of a sheath tube according to one or more embodiments.

Fig. 15 is a schematic structural diagram of a safety lock mechanism according to one or more embodiments.

Fig. 16 is a schematic structural diagram of a safety lock mechanism according to one or more embodiments.

Detailed ways

The following clearly and completely describes the technical solutions in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Please refer to FIGS. 1-14, the present embodiment provides a biopsy gun 100, which mainly includes a housing 1, a core needle 11, a cutting tube 12, a cutting tube fixing member 5, an outer sleeve 13, an outer sleeve fixing member 6, Spring 112, gear position member 8, pusher 2 and so on. For the convenience of description, in this embodiment, the puncture end of the biopsy gun 100 is marked as the front, and the opposite end is marked as the rear. For details, refer to FIG. 1 .

As shown in FIG. 2 , the core needle 11 is fixedly installed on the housing 1 along the axial direction of the housing 1 .

The cutting tube 12 is fixed on the cutting tube fixture 5, for example, the cutting tube 12 is fixedly installed on the cutting tube fixture 5 by dispensing; It is fixedly installed on the outer casing fixture 6; the cutting tube 12 is movably inserted in the outer casing 13, and the core needle 11 is movably inserted in the cutting tube 12, and the core needle 11, the cutting tube 12, and the outer casing 13 are coaxially arranged.

Both the cutting tube fixing part 5 and the outer casing fixing part 6 are slidably installed in the casing 1 along the axial direction of the casing 1 .

As shown in Figure 2, a lubricating tube 111 is movably sleeved on the core needle 11, and the lubricating tube 111 is located between the cutting tube fixing part 5 and the rear end of the housing 1, and the spring 112 is sleeved on the lubricating tube 111, and its two The front end of the lubricating pipe 111 and the rear end of the housing 1 respectively, and the front end of the lubricating pipe 111 abuts against the rear end of the cutting pipe fixing member 5, so that the spring 112 pushes the lubricating pipe 111 so that the cutting pipe fixing member 5 Apply forward thrust.

As shown in Figure 2 and Figure 3, the front end of the cutting tube fixing part 5 is provided with a bayonet 51 for connecting with the outer tube fixing part 6, the rear end of the cutting tube fixing part 5 is provided with a first barb 52, and the casing 1. A first step 14 is fixed on the inner wall; the first barb 52 is hooked on the first step 14 so that the cutting tube fixing member 5 is kept positioned relative to the casing 1 and enters the ready state.

As shown in Figure 10, the pusher 2 is arranged on the casing 1, and the pusher 2 is arranged to control the firing action of the biopsy gun 100 along the axial direction of the casing 1. When the pusher 2 is pushed to the firing position, the biopsy gun 100 to perform the firing action, specifically:

As shown in FIG. 4 and FIG. 10 , the pusher 2 includes a body part 21 located inside the housing 1 and a push button 22 connected to the body part 21 and located outside the housing 1. The body part 21 has an arc-shaped half-shell structure Used to slide inside the housing 1 , the body part 21 is driven to slide in the housing 1 by pushing the push knob 22 along the axial direction of the housing 1 .

As shown in FIG. 2 , the front end of the body part 21 is provided with a second step 211, and the cutting tube fixing member 5 is provided with an abutment surface for the second step 211 to abut against. When the body part 21 is pushed backward, the second step The step 211 abuts against the abutment surface, and then pulls the cutting pipe fixing member 5 backward.

The inner side of the rear end of the body portion 21 is provided with a second barb 212 matched with the first barb 52 , a first slope is provided at the rear end of the first barb 52 , and a second barb is provided at the front end of the second barb 212 . Two slopes, when the main body part 21 is pushed forward to perform the firing action, the second slope constantly pushes the first slope outwards, so that the first barb 52 is released from the first step 14, and the first step 14 releases the cutting tube. The limitation of the fixing part 5, at this moment, under the effect of the spring 112, the cutting tube fixing part 5 just moves forward, so that the cutting tube fixing part 5 is in the fired state.

As shown in FIG. 2 and FIG. 5 , the outer sleeve fixing member 6 is arranged on the front side of the cutting tube fixing member 5 along the axial direction of the housing 1 , and the outer sleeve fixing member 6 is provided with a bayonet for the cutting tube fixing member 5 The third step 61 against which the rear side of the housing 51 abuts has a space in the bayonet 51 for the third step 61 to move axially along the housing 1 , and the axial length of the space is greater than or equal to the cutting distance of the cutting tube 12 .

The front end of the outer tube fixing part 6 is provided with a stopper 62 for the front end of the bayonet socket 51 to abut against. The stopper 62 can move relative to the outer casing fixing part 6. When the stopper 62 abuts against the front end of the bayonet socket 51, the cutting tube is fixed. There is a distance between the piece 5 and the outer sleeve fixing piece 6, for the cutting tube 12 to advance and cut.

When cutting, when the cutting tube fixing part 5 is fired and moves forward, it drives the outer casing fixing part 6 to advance. The block 62 abuts against the front end of the bayonet socket 51 without the restriction of the stopper 62, and the cutting tube fixture 5 drives the cutting tube 12 to continue to advance a certain distance to perform the cutting action under the thrust of the spring 112.

Specifically, the biopsy gun in the related art includes an outer sleeve assembly, a cutting tube assembly, an inner core needle, and a handle assembly. The outer sleeve assembly includes an outer sleeve and an outer sleeve holder, and the outer sleeve is fixedly installed on the outer sleeve holder. Above, the cutting tube assembly includes a cutting tube and a cutting tube fixing piece, the cutting tube is fixedly mounted on the cutting tube fixing piece, the handle assembly includes an upper shell and a lower shell, and the inner core needle is fixedly mounted on the handle assembly Above, the outer casing is set on the outer periphery of the cutting tube, the cutting tube is set on the outer periphery of the inner core needle, the upper shell and the lower shell form the inner cavity of the handle, and a first step is arranged in the inner cavity of the handle. The inner cavity of the handle is provided with a chute through which the cutting tube fixing part can drive the outer casing fixing part to move back and forth. The cutting principle of the biopsy gun is as follows: in the initial state, the inner core needle is retracted in the outer sleeve, the push handle is pulled back, the push handle drives the cutting tube fixing part to move backward, and the cutting tube fixing part drives the outer sleeve fixing part to move backward at the same time, Until the cutting tube fixing part is hooked on the first step of the upper shell and the lower shell; when it is in the puncture state, it can be punctured percutaneously; push the handle forward to unhook the cutting tube fixing part from the first step, In this way, the overcoat fixing part is driven forward together. At this time, the cutting tube and the overtube fixing part move forward together and are inserted into the tissue. The inner cavity of the cutting tube will be filled with cylindrical tissue strips until the stopper of the overcoat fixing part When the upper and lower chamfers are touched, the limiter sinks along the sinking slope of the limiter, so that the outer tube fixing part is separated from the cutting tube fixing part, so that the cutting tube fixing part continues to move forward under the action of the spring, driving the cutting tube Advance, thereby completing the cutting of the tissue.

As shown in Figure 6 and Figure 8, the gear member 8 is mainly used to adjust the cutting length, including a screw 81 and a knob 82, the screw 81 is passed through the front end of the housing 1, and can move along the axial direction of the housing 1. The circumferential direction relative to the housing 1 is kept in position, and the knob 82 is rotatably connected to the front end of the housing 1. The inside of the knob 82 has a screw thread, which is threadedly connected with the screw rod 81. In this way, the rotation of the knob 82 drives the screw rod 81 to move back and forth to realize adjustment. Effect.

In this embodiment, as shown in FIG. 5 , an opening 60 is provided on the outer sleeve fixing member 6 , and the opening 60 is arranged radially along the housing 1 . Axial sliding (that is, the radial sliding of the housing 1), as shown in Figure 6 and Figure 8, on both sides of the rear end of the screw 81 are provided with oppositely arranged slope surfaces 811, and a stopper is formed between the two slope surfaces 811 62 sinks into the sinking space 812. When cutting is fired, the cutting tube fixing part 5 drives the outer casing fixing part 6 to advance. When the outer casing fixing part 6 touches the rear end of the screw rod 81, it reaches the end position. At this time, the outer casing The fixing part 6 stops, and now the stopper 62 on the outer sleeve fixing part 6 advances to the sinking space 812, so that the stopper 62 sinks into the sinking space 812, thereby releasing the restriction to the cutting tube fixing part 5, so that Under the promotion of the spring 112, the cutting pipe fixing member 5 continues to advance for a certain distance to perform the cutting action.

In this embodiment, in the initial state, the stopper 62 is against the front end of the bayonet 51. At this time, the distance between the cutting tube fixing part 5 and the outer casing fixing part 6 determines the cutting stroke of the final cutting tube 12. When assembling, it is necessary to replace the cutting tube 12 of different specifications, and the cutting strokes of the cutting tube 12 of different specifications are different, and the axial length of the outer sleeve fixing part 6 or the cutting tube fixing part 5 needs to be increased or decreased accordingly, so as to To change the distance between the two to adapt to the cutting tube 12 of this specification, and the cutting tube fixing part 5 and the outer tube fixing part 6 are used as core components, when the processing is changed, not only the processing difficulty is large but also the processing cost is high.

Therefore, this embodiment is further improved. Specifically, as shown in FIG. 7 and FIG. 8 , in this embodiment, there is also a set between the cutting tube fixing part 5 and the outer casing fixing part 6 for fixing the cutting tube. The sliding part 7 against which the part 5 and the outer casing fixing part 6 abut; the sliding part 7 is slidably arranged in the casing 1 along the axial direction of the casing 1, and the sliding part 7 is slidably connected with the cutting tube 12 in the axial direction , the sliding part 7 is in the shape of a plate; in this way, the sliding part 7 as a whole is equivalent to a pad, and finally when cutting, the cutting tube fixing part 5 presses the sliding part 7 to the outer tube fixing part 6. In the initial state, when When the sliding part 7 abuts against the outer casing fixing part 6, the distance between the cutting tube fixing part 5 and the sliding part 7 is the cutting stroke of the cutting tube 12, so that when it is necessary to replace the cutting tube 12 of different specifications, only the cutting tube 12 needs to be replaced. The sliding part 7 of different thickness (being the axial length of sliding part 7) just can change cutting stroke, so just need not carry out lengthening or shortening processing to cutting tube fixing part 5 or outer tube fixing part 6; For sliding part 7 Compared with the cutting tube fixing part 5 and the outer casing fixing part 6 as the core components, the processing difficulty and processing cost are undoubtedly much smaller.

For this biopsy gun 100, the cutting action is triggered mainly by the pusher 2. However, since the pusher 2 can slide freely on the housing 1, it is easy to accidentally touch the pusher 2 to make the biopsy gun 100 perform the firing action. Therefore, the present embodiment makes further improvements, specifically:

As shown in Fig. 1, Fig. 9, Fig. 10 and Fig. 11, the biopsy gun 100 also includes a safety lock mechanism A, the safety lock mechanism A includes a rotating member 3 slidingly arranged along the circumferential direction of the housing 1, and The positioning part IV on the housing 1, the rotating part 3 includes a stopper part 31, and the stopper part 31 is mainly used to block the advancement of the pusher part 2 when locking.

In this application, a safety lock mechanism A is provided on the biopsy gun 100, so that the biopsy gun 100 can be locked through the safety lock mechanism A to form a blocking effect on the advancement path of the pusher 2, so as to avoid accidentally touching the pusher and causing the biopsy gun to 100 risk of firing.

As shown in Figure 9 and Figure 15, in this embodiment, an elastic protrusion 321 is provided on the stopper part 31, and a locking positioning hole 41 is provided on the positioning part IV, when the elastic protrusion 321 snaps into the locking positioning hole 41 , the stopper portion 31 and the housing 1 remain relatively positioned. It can be understood that, as shown in FIG. 16 , in other embodiments, the elastic protrusion 321 can also be provided on the positioning part IV, and the locking positioning hole 41 is correspondingly provided on the stopper part 31, which is also It can achieve the effect that the stop part 31 and the housing 1 maintain relative positioning during locking.

When the elastic protrusion 321 is disposed on the positioning portion IV and the corresponding locking positioning hole 41 is correspondingly disposed on the stop portion 31 , the number of the elastic protrusion 321 can be two. The two elastic protrusions 321 are distributed along the circumferential direction of the positioning part IV at intervals, and the two elastic protrusions 321 are respectively snapped into the locking positioning hole 41 to realize relative positioning or unlocking of the stopper part 31 and the housing 1 .

Through the stopper 31 and the positioning part IV, one of them is provided with a locking positioning hole 41, and the other is provided with an elastic protrusion 321, so that when the stopper 31 is turned to the locking position II, the elastic protrusion 321 It will snap into the locking positioning hole 41, so that under the cooperation of the elastic protrusion 321 and the locking positioning hole 41, the stopper 31 remains locked to be positioned on the biopsy gun 100. If there is no external force, the stopper 31 Part 31 just is difficult to continue to rotate, thereby guarantees the stability of locking.

As shown in Figure 12, the rotating member 3 rotates in the circumferential direction relative to the housing 1 to produce an unlocked position I and a locked position II. When the firing position is reached, the specific stop part 31 will stop at the front side of the body part 21, as shown by the M part in FIG. The firing position here refers to the position where the pusher 2 triggers the biopsy gun 100 to perform the firing action. In other words, when the pusher 2 moves to the firing position, the biopsy gun 100 fires to realize subsequent cutting and sampling actions.

As shown in Figure 12 and Figure 15, in the unlocked position I, the elastic projection 321 escapes from the locking positioning hole 41, and the stopper 31 forms an avoidance on the advancing path of the pusher 2, where the avoidance refers to the stop The blocking portion 31 moves out from the advancement path of the pusher 2, so that the pusher 2 can normally advance to the firing position, thereby triggering the biopsy gun 100 to perform the firing action.

In this way, the stopper 31 can be rotated to the advance path of the pusher 2, so that the stopper 31 will form a block on the advance path of the pusher 2 to limit the pusher 2 from reaching the firing position, thereby realizing For the locking effect, the locking method using the rotation stopper 31 is easy to operate and convenient to operate with one hand.

Moreover, when the stopper 31 is rotated to the locking position II, the elastic projection 321 will snap into the locking positioning hole 41, so that the stopper 31 remains locked under the cooperation of the elastic projection 321 and the locking positioning hole 41. state to be positioned on the biopsy gun 100, if there is no external force, the stopper 31 is difficult to continue to rotate, thereby ensuring the stability of the lock.

As shown in Figure 9, Figure 12 and Figure 15, in order to ensure the stability of the stopper 31 at the unlocking position I, in this embodiment, the positioning part IV is also provided with an unlocking positioning hole 42, and the unlocking positioning The hole 42 and the locking positioning hole 41 are spaced apart along the rotation direction of the stopper 31 . In the unlocking position I, the elastic protrusion 321 snaps into the unlocking positioning hole 42 to keep the stopper 31 and the housing 1 in relative position.

As shown in Figure 16, when the elastic projection 321 is arranged on the positioning part IV, and the corresponding locking positioning hole 41 is correspondingly provided on the stop part 31, the stop part 31 is also provided with an unlocking positioning hole 42, The unlocking positioning hole 42 and the locking positioning hole 41 are distributed at intervals along the rotation direction of the stopper 31. Under the unlocking position I, the elastic protrusion 321 snaps into the unlocking positioning hole 42 to keep the stopper 31 and the housing 1 in relative position. .

It can be seen that when the stopper 31 is rotated until the elastic protrusion 321 snaps into the unlocking positioning hole 42, the stopper and the housing 1 will also be in a state of maintaining relative positioning, so that the stopper is not easy to rotate easily, ensuring the lock Stability of the catch 31 in the unlocked position I.

Moreover, another advantage of adopting the locking positioning hole 41 and the unlocking positioning hole 42 at the same time is that it is helpful to respectively set marks marking the unlocking position I and the locking position II on the positioning part IV in actual use to judge the safety. The current state of the lock mechanism A; for example, "S" is printed on the positioning part IV to indicate the locked position II, and "F" is printed to indicate the unlocked position I. When the stopper rotates to the locking position II, the elastic protrusion 321 snaps into the locking positioning hole 41, and the rotating part 3 points to the character "S", indicating that the current state of the safety lock mechanism A is locked; similarly, when When the stopper rotates to the unlocking position I, the elastic projection 321 snaps into the unlocking positioning hole 42, and the rotating member 3 points to the character "F", indicating that the current state of the safety lock mechanism A is in the unlocking state. Therefore, after the user gets the biopsy gun 100, he can observe the sign to which the rotating member 3 is currently pointing to know whether the current safety lock mechanism A is in the locked state or the unlocked state, in other words, whether the stopper 31 is in the unlocked position I or the locked position II.

On the contrary, if the locking positioning hole 41 and the unlocking positioning hole 42 are not provided, the rotating part 3 will rotate freely on the housing 1 if the elastic protrusion 321 is positioned in cooperation. Even if a mark is set on the biopsy gun 100, the rotating part 3 will Free rotation, so that it is impossible to accurately point to the corresponding logo, and thus it is impossible to judge the current state of the safety lock mechanism A.

In this embodiment, the stop portion 31 has an arc-shaped structure, and the outer peripheral wall of the casing 1 is provided with a chute 10 arranged along the circumference of the casing 1, and the stop portion 31 is arranged on the chute 10 Sliding along the circumferential direction of the chute 10, by setting the chute 10 to slide and guide the stopper 31, the stopper 31 can be prevented from axially shifting along the housing 1; in the locked position II, the stopper 31 is at least partially extended. Out of the chute 10 forms a barrier to the body part 21 of the pusher 2 .

As shown in FIG. 11 , the stop portion 31 is provided with an elastic arm 32 whose end is relatively fixed to the stop portion 31 . In this embodiment, the stop portion 31 includes an elastic arm 32 and an elastic protrusion 321 It is arranged on the elastic arm 32, and the interval between the elastic arm 32 and the stopper 31 is arranged to form a space for the deformation of the elastic arm 32; the elastic protrusion 321 is arranged on the inner side of the other end of the elastic arm 32. The elastic deformation of the arm 32 causes the elastic protrusion 321 to snap into the locking positioning hole 41 or the unlocking positioning hole 42 . The outer edge of the elastic protrusion 321 can be provided with an arc structure or a slope structure, so that the elastic protrusion 321 can turn in and out from the unlocking positioning hole 42 and the locking positioning hole 41 more smoothly.

In order to facilitate the rotation of the stopper 31, in this embodiment, the stopper 31 is also provided with a rotating handle 33 for assisting the rotation of the stopper 31, and the stopper 31 includes an elastic arm 32 and a rotating handle 33 , the elastic protrusion 321 is disposed on the elastic arm 32 . A space for the deformation of the elastic arm 32 is provided between the elastic arm 32 and the rotating handle 33, through which the elastic arm 32 can drive the elastic protrusion 321 to deform to the side away from the housing 1, so that the elastic protrusion 321 It can be turned in and out from the locking positioning hole 41 and the unlocking positioning hole 42 normally.

The specific structure of the positioning part IV is as follows: as shown in Figure 9 and Figure 12, the positioning part IV includes a shell 4 fixedly sleeved on the shell 1, and the shell 4 and the shell 1 are spaced apart to form an interlayer space, the stopper 31 slides in the interlayer space, and the casing 4 is provided to restrict the stopper 31 from slipping out along the radial direction of the housing 1 .

The rotating handle 33 and the elastic arm 32 are located on the outside of the casing 4, so as to operate the rotating handle 33 externally; the casing 4 is provided with an avoidance port 43 for the movable connecting part of the rotating handle 33 and the stopper 31, through The setting of the avoidance port 43 can ensure that the rotating handle 33 can rotate normally, and then drive the stopper 31 to rotate.

Of course, it can be understood that a sliding opening for the pusher 2 to slide is also provided on the shell 4 to ensure that the pusher 2 can be pushed on the shell 4 normally.

In this embodiment, as shown in FIG. 13 and FIG. 14 , in order to protect the core needle 11, outer sleeve 13, and cutting tube 12 during transportation, the embodiment described in this embodiment also includes a biopsy gun that is detachably installed. The sheath tube 9 at the front end of 100, the core needle, the outer sleeve 13, and the cutting tube 12 are all located inside the sheath tube 9, and the exposed parts of the core needle, the outer sleeve 13, and the cutting tube 12 are mainly inside the sheath tube 9.

In order to facilitate the loading and unloading of the sheath tube 9, one end of the sheath tube 9 in this embodiment is fixedly provided with a clamping piece 91, and the clamping piece 91 has a certain elastic deformation capacity; Bending outside to form chucks 911, the end of the biopsy gun 100 is respectively provided with slots 821 corresponding to the two chucks 911, specifically, the slots 821 here can be two opposite notches on the knob 82, so There is no need to additionally provide a locking slot 821 on the biopsy gun 100 , and the locking part is locked in the locking slot 821 to realize the fixing of the sheath tube 9 and the biopsy gun 100 .

In order to facilitate the insertion or removal of the clamp head 911 from the slot 821, in this embodiment, the clamping member 91 is bent outwards relative to the side of the clamp head 911 to form a force part 912 for human hands to press. When 912 is pressed to the middle, the two chucks 911 will open in the direction away from each other. Specifically, the force part 912 is in a sheet-like structure, which is equivalent to the effect of a wrench. Press the two force parts 912 in the middle with your hand to make the two The clips 911 are opened in a direction away from each other, so that there is enough space between the two clips 911 to be inserted into the clip slot 821 or taken out from the clip slot 821 .

It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, but that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and not restrictive in all points of view, and the scope of the application is defined by the appended claims rather than the foregoing description, and it is intended that the scope of the present application be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in this application.

Claims

A biopsy gun, comprising a housing, and a pusher arranged on the housing to slide axially along the housing to control the firing action of the biopsy gun. When the pusher is pushed to the firing position, the biopsy gun performs the firing action. The biopsy gun also includes a safety lock mechanism, the safety lock mechanism includes a rotating member slidingly arranged along the circumferential direction of the housing, and a positioning part provided on the housing, the rotating member includes a stopper, and the stopper part and positioning part, one of which is provided with a locking positioning hole, and the other is provided with an elastic protrusion, when the elastic protrusion snaps into the locking positioning hole, the stopper part and the housing remain relatively positioned; the rotation The component includes an unlocked position and a locked position. In the locked position, the stopper rotates to the advancing path of the pusher to limit the pusher from reaching the firing position, and the elastic protrusion snaps into the locking positioning hole; in the unlocked position, The stop portion forms an escape on the advancement path of the pusher.
The biopsy gun according to claim 1, wherein the biopsy gun further comprises a cutting tube fixing part and an outer sleeve fixing part which are arranged in the casing and are respectively slid along the axial direction of the casing, and the cutting tube fixing part is used to fix The cutting tube of the biopsy gun drives the cutting tube to move, and the outer tube fixing part is used to fix the outer tube of the biopsy gun to drive the outer tube to move; The sliding part against which the tube fixing part and the outer casing fixing part abut; the sliding part is slidably arranged in the casing along the axial direction of the casing, and the sliding part is slidably connected with the cutting pipe along the axial direction.
The biopsy gun according to claim 1, wherein the elastic protrusion is provided on the stopper part, and the locking positioning hole is provided on the positioning part.
The biopsy gun according to claim 3, wherein the positioning part is further provided with an unlocking positioning hole, and the unlocking positioning hole and the locking positioning hole are arranged at intervals along the rotation direction of the stop part, and in the unlocked position, the elastic protrusion Snapping into the unlocking positioning hole keeps the stopper part and the housing in a relative position.
The biopsy gun according to claim 3 or 4, wherein the stop part is in an arc shape, the outer peripheral wall of the housing is provided with a chute along the circumference of the housing, and the stop part is provided with Sliding in the chute along the circumferential direction of the chute; in the locked position, at least a part of the stop part protrudes out of the chute to block the pusher.
The biopsy gun according to claim 5, wherein the stop part is provided with an elastic arm whose end is relatively fixed to the stop part, and an interval between the elastic arm and the stop part is provided to form a space for the elastic arm to deform. space; the elastic protrusion is arranged inside the other end of the elastic arm.
The biopsy gun according to claim 6, wherein a rotating handle for assisting in rotating the stopping part is further provided on the stop part, and a space for deformation of the elastic arm is provided between the elastic arm and the rotating handle.
The biopsy gun according to claim 7, wherein the positioning part includes a shell fixedly sleeved on the shell, the shell and the shell are spaced apart to form an interlayer space, and the stopper is positioned between the interlayer The rotating handle and the elastic arm are located on the outer side of the casing; the casing is provided with an escape opening for the movement of the connecting part of the rotating handle and the stopper.
The biopsy gun according to claim 1, wherein the biopsy gun further comprises a sheath tube detachably installed at the front end of the biopsy gun, and the core needle, the outer sleeve and the cutting tube are all located inside the sheath tube.
The biopsy gun according to claim 9, wherein one end of the sheath tube is fixedly provided with a clamping piece, and the opposite sides of the clamping piece are bent outward to form clamping heads, and the ends of the biopsy gun correspond to The two clips are respectively provided with slots, and the clips are clipped in the slots to realize the fixing of the sheath tube and the biopsy gun. Focus on the Ministry.