Full-automatic biopsy needle

Abstract

The utility model provides a full-automatic biopsy needle, which belongs to the technical field of biopsy needles, and particularly comprises a shell, a biopsy needle assembly, a percussion assembly, a triggering assembly and a locking assembly, the locking assembly comprises a locking piece, and at a locking position, the locking piece prevents the triggering assembly from moving towards a triggering position; a fixed supporting disc is formed in the shell, when the locking key moves to the locking position, the far-end side of the locking piece abuts against the fixed supporting disc, the locking assembly is arranged between the triggering assembly and the percussion assembly, the triggering assembly is prevented from moving to the triggering position, the situation that the locking assembly is arranged on a percussion path of the percussion assembly can be avoided, and the percussion effect is improved. When the percussion assembly conducts percussion, the percussion assembly is switched from the energy storage state to the percussion state, the locking assembly stops the percussion assembly from conducting percussion on the path of the percussion assembly, the percussion assembly can keep the percussion state all the time, the elastic force of the spring is large, and the locking assembly is prone to failure under long-time extrusion of the elastic force.

Description

TECHNICAL FIELD

[0001] The utility model relates to biopsy needle technical field, specifically, relate to a full -automatic biopsy needle. BACKGROUND

[0002] Full -automatic biopsy needle is a kind of advanced medical equipment for obtaining tissue sample to carry out pathological detection.Compared with traditional manual biopsy mode, full -automatic biopsy needle realizes automation in launching, sampling, improves the efficiency and accuracy of biopsy sampling.

[0003] Full -automatic biopsy needle in the related art usually includes shell, firing assembly and biopsy needle assembly, firing assembly is provided with spring, so it has energy storage state and firing state, when energy storage state, firing assembly drives biopsy needle assembly to shrink to the direction of shell, and spring energy storage;When firing state, spring releases elastic potential energy to drive firing assembly and biopsy needle assembly to move away from the direction of shell quickly, to complete biopsy sampling.

[0004] In order to prevent the operator from being mistaken, the locking structure is usually designed in the related art, and the firing assembly is locked in the energy storage state before the operator operates sampling, and due to the structure layout limitation of full -automatic biopsy needle in the related art, the locking structure is usually arranged on the firing path of firing assembly, even if the operator causes firing assembly to fire due to mistaken, then because of the locking of locking structure to firing assembly, the operation accident is prevented from happening.But, in the actual use of the applicant, it is found that, because the spring firing force is large, the locking structure is prone to be damaged by the impact of firing assembly and even failure, if the spring firing force is reduced, the effect of quick firing cannot be achieved. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of full -automatic biopsy needle, to solve the problem that locking structure is prone to damage and cause failure in the related art.

[0006] The additional aspects and advantages of the utility model will be partly set forth in the following description, and part will become obvious from the description, or can be obtained by the practice of the utility model.

[0007] According to the first aspect of the utility model, a kind of full -automatic biopsy needle is provided, comprising:

[0008] Shell, biopsy needle assembly, firing assembly, trigger assembly, locking assembly;

[0009] The biopsy needle assembly, firing assembly, trigger assembly, locking assembly are assembled in the shell;

[0010] The firing assembly has an energy storage state of retracting the biopsy needle assembly to the proximal direction of the housing and a firing state of extending the biopsy needle assembly to the distal direction of the housing under the trigger of the trigger assembly, and the biopsy needle assembly performs biopsy sampling in the switching process from the energy storage state to the firing state;

[0011] The trigger assembly is used for triggering the firing assembly, is assembled on the proximal side of the firing assembly on the housing, and has an initial position and a trigger position of moving along the trigger path toward the distal direction of the housing to trigger the switching of the firing assembly from the energy storage state to the firing state.

[0012] The locking assembly comprises a locking piece which is rotatably mounted on the proximal side of the housing, has an unlocking position and a locking position of rotating along the circumferential direction of the housing to be inserted between the trigger assembly and the firing assembly, and blocks the movement of the trigger assembly to the trigger position in the locking position; and a fixed support disc is formed in the housing and is arranged to abut against the distal end face of the locking piece when the locking piece rotates to the locking position.

[0013] In an exemplary embodiment of the utility model, the locking assembly further comprises a locking key assembled on the housing, the locking key is fixedly connected with the locking piece or is an integral structure, a waist-shaped hole extending along the circumferential direction of the housing is formed on the housing, and the locking key is rotatably mounted in the waist-shaped hole along the circumferential direction of the housing and drives the locking piece to switch between the unlocking position and the locking position.

[0014] In an exemplary embodiment of the utility model, the trigger assembly comprises a rear trigger key and a trigger link, the rear trigger key is pressingly mounted on the proximal end face of the housing, the trigger link is mounted on the distal side of the rear trigger key in the housing, the rear trigger key drives the trigger link to move from the initial position to the trigger position, and the trigger link triggers the firing assembly in the trigger position.

[0015] In the locking position, the proximal end face of the locking piece abuts against the trigger link, and the distal end face of the locking piece is abutted by the fixed support disc.

[0016] In an exemplary embodiment of the utility model, the end face of the insertion end of the locking piece inserted between the trigger assembly and the firing assembly is formed with a relief inclined surface for cooperating with the trigger link.

[0017] In an exemplary embodiment of the utility model, the shell comprises an outer shell and an inner shell, the outer shell is sleeved outside the inner shell, the inner shell comprises a firing assembly mounting cavity at a distal end side and a trigger assembly mounting cavity at a proximal end side, and a biopsy needle assembly mounting cavity at one side of the firing assembly mounting cavity and the trigger assembly mounting cavity, the firing assembly, the trigger assembly and the biopsy needle assembly are respectively assembled in the firing assembly mounting cavity, the trigger assembly mounting cavity and the biopsy needle assembly mounting cavity.

[0018] In an exemplary embodiment of the utility model, the fixed support disc is a cavity wall at a distal end side of the trigger assembly mounting cavity, a first clamping hole for the firing assembly to extend out of and be clamped with an extending end of the firing assembly is formed in the middle of the fixed support disc, and the firing assembly extends out of the first clamping hole in the energy storage state.

[0019] In an exemplary embodiment of the utility model, the trigger connecting rod has a pair of elastic fins extending to two sides, a blocking wall for resisting the elastic fins is formed in the trigger assembly mounting cavity, and when the trigger connecting rod moves from the initial position to the trigger position, the blocking wall resists the elastic fins to deform and store energy, and after the rear trigger key is released from driving the trigger connecting rod, the trigger connecting rod drives the rear trigger key to automatically move from the trigger position to the initial position under the action of the elastic fins deforming and recovering.

[0020] In an exemplary embodiment of the utility model, the biopsy needle assembly comprises a needle core and a needle tube slidingly sleeved outside the needle core.

[0021] The firing assembly comprises a first sub-firing assembly arranged at a proximal end and a second sub-firing assembly arranged at a distal end, the firing assembly mounting cavity has a first cavity arranged at a proximal end and a second cavity arranged at a distal end, the fixed support disc is formed at the connection between the first cavity and the trigger assembly mounting cavity, the first sub-firing assembly is arranged in the first cavity, the second sub-firing assembly is arranged in the second cavity, the needle core is connected to the first sub-firing assembly, the needle tube is connected to the second sub-firing assembly, the first sub-firing assembly is switched from the energy storage state to the firing state under the triggering of the trigger assembly, and simultaneously drives the needle core to pop out in a distal end direction, and the first sub-firing assembly is switched to the firing state to trigger the second sub-firing assembly to switch from the energy storage state to the firing state, and simultaneously drives the needle tube to pop out in a distal end direction.

[0022] In an exemplary embodiment of the utility model, the first sub-firing assembly comprises a first sliding block and a first elastic member, and the second sub-firing assembly comprises a second sliding block and a second elastic member.

[0023] The needle core is fixed to the first slider, the first slider is slidingly installed in the first cavity, the first slider has an energy storage state in which the first elastic member is compressed to retract the needle core, and the first slider also has a cocking state in which the needle core is ejected.

[0024] The needle tube is fixed to the second slider, the second slider is slidingly installed in the second cavity, the second slider has an energy storage state in which the second elastic member is compressed to retract the needle tube, and the second slider also has a cocking state in which the needle tube is ejected.

[0025] The exemplary embodiments of the utility model can have the following parts or all of the beneficial effects:

[0026] In the full-automatic biopsy needle provided by the exemplary embodiment of the utility model, the locking assembly is used for locking the biopsy needle assembly, the cocking assembly has an energy storage state in which the biopsy needle assembly is retracted towards the proximal end of the shell and a cocking state in which the biopsy needle assembly is extended towards the distal end of the shell under the triggering of the triggering assembly, and the biopsy needle assembly performs biopsy sampling in the switching process from the energy storage state to the cocking state; the triggering assembly is used for triggering the cocking assembly, the triggering assembly is assembled on the proximal end side of the cocking assembly on the shell, the triggering assembly has an initial position and a triggering position which moves along the triggering path towards the distal end of the shell to trigger the cocking assembly to switch from the energy storage state to the cocking state; the locking assembly includes a locking piece, the locking piece is rotatably installed on the proximal end side of the shell, the locking piece has an unlocking position and a locking position which is rotated and inserted between the triggering assembly and the cocking assembly along the circumferential direction of the shell, the locking piece is rotated along the circumferential direction of the shell to switch between the unlocking position and the locking position, and the locking position of the locking piece is located between the triggering assembly and the cocking assembly, that is, in the utility model, the locking position is located on the triggering path of the triggering assembly. When the full-automatic biopsy needle is in a non-working state, for safety, the operator usually locks the full-automatic biopsy needle, in the specific implementation, the locking piece is operated to rotate from the unlocking position to the locking position which is inserted between the triggering assembly and the cocking assembly along the circumferential direction of the shell, and in the locking position, the locking piece can block the movement of the triggering assembly to the triggering position; in the full-automatic biopsy needle provided by the exemplary embodiment of the utility model, a fixed support disc is further included, the fixed support disc is formed inside the shell, and the fixed support disc is arranged to abut against the distal end face of the locking piece to support the locking piece when the locking piece is rotated to the locking position.

[0027] On the one hand, by setting the locking position between the trigger assembly and the firing assembly, i.e. setting the locking position on the trigger path, even if the operator is mistaken, the trigger force borne by the locking piece is far less than the firing force in the related art, avoiding the situation that the locking piece is damaged and fails; on the other hand, the locking piece is horizontally rotatably installed in the shell, the horizontal rotatable installation mode can reduce the vertical occupied space, which is beneficial to reduce the vertical size of the biopsy needle as a whole; on the other hand, by setting the fixed support disc to support the distal end surface of the locking piece of the locking position, the locking piece can bear greater axial force, and the locking piece is less likely to be deformed, compared with the cantilever beam scheme of penetrating the shell into the trigger path to lock the trigger assembly, the scheme of the utility model that rotates and inserts into the trigger path and is supported by the fixed support disc makes the locking piece bear greater axial force and is less likely to be deformed, and importantly, there is no need to open holes on the left and right sides of the shell, avoiding the situation that the overall strength of the product is reduced due to the strength reduction of the shell because of the opening.

[0028] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the utility model, and together with the specification are used to explain the principles of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0030] Figure 1 A structure schematic view of a kind of full-automatic biopsy needle in the utility model embodiment 1 is shown;

[0031] Figure 2 An explosion view of a kind of full-automatic biopsy needle in the utility model embodiment 1 is shown;

[0032] Figure 3 Partial explosion view of a kind of full-automatic biopsy needle in the utility model embodiment 1 is shown;

[0033] Figure 4 A sectional view when the firing assembly in the utility model embodiment 1 is in energy storage state is shown;

[0034] Figure 5 A structure schematic view when the firing assembly in the utility model embodiment 1 is in firing state is shown; Figure 4 Enlarged schematic view in A of the utility model;

[0035] Figure 6 A structure schematic view when the firing assembly in the utility model embodiment 1 is in firing state is shown;

[0036] Figure 7 shows the sectional view of the firing assembly in the firing state in the embodiment 1 of the utility model;

[0037] Figure 8 shows the structure schematic view of the firing assembly in the embodiment 1 of the utility model;

[0038] Figure 9 shows the exploded schematic view of the needle core in the biopsy needle assembly in the embodiment 1 of the utility model.

[0039] Mark explanation:

[0040] 1, biopsy needle assembly; 101, needle core; 1011, needle body; 1012, needle tip; 1013, sensor assembly channel; 1014, sampling groove; 102, needle tube;

[0041] 2, shell; 3, rear trigger key; 4, side trigger key; 5, trigger assembly; 51, third slider; 511, second inclined surface; 52, elastic fin;

[0042] 6, firing assembly; 61, first sub firing assembly; 611, first slider; 6111, first elastic block; 6112, first inclined surface; 612, first elastic member; 62, second sub firing assembly; 621, second slider; 6211, second elastic block; 6212, third inclined surface; 622, second elastic member;

[0043] 7, first inner shell; 8, second inner shell; 9, second pressing key; 10, first pressing key; 11, first electromagnetic navigation sensor; 12, connecting through hole; 14, fixed protection tube; 15, trigger connecting rod; 16, first clamping hole; 17, second clamping hole; 18, fourth inclined surface; 19, locking member; 191, avoiding inclined surface; 20, fixed support disc; 21, locking key; 23, positioning protrusion. DETAILED DESCRIPTION

[0044] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any number of manners, and are not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like or similar elements throughout the drawings, and thus a detailed description of them will not be repeated. Furthermore, the drawings are merely schematic and are not necessarily drawn to scale.

[0045] Although relative terms are used in this description, such as "upper," "lower," to describe one component's relationship to another component, these terms are used herein solely for convenience and are in no way limiting. It is to be understood that these terms are intended to encompass different positional relationships of an apparatus including the device as those apparatuses are oriented in different directions. For example, if the device is turned over, components described as being on "upper" side of other components would then be oriented on a "lower" side. Similarly, the term "on" as used herein refers to an in-direct or direct attachment between two components, unless otherwise noted.

[0046] The terms "one," "a," "an," and "the" are used to mean one or more than one, unless otherwise indicated. The term "includes" and "including" means, and is used to mean, "comprising" or "comprising." The term "first," "second," and the like, are used to describe various components, and do not imply a limitation on the number of such components. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0047] Embodiment 1

[0048] The present embodiment provides a specific implementation of a fully automatic biopsy needle, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , including a housing, a biopsy needle assembly 1, a firing assembly 6, a trigger assembly 5, and a locking assembly, wherein the biopsy needle assembly 1, the firing assembly 6, the trigger assembly 5, and the locking assembly are all assembled in the housing. The firing assembly 6 is connected with the biopsy needle assembly 1, and the firing assembly 6 has an energy storage state of driving the biopsy needle assembly 1 to retract in the proximal direction of the housing and a firing state of driving the biopsy needle assembly 1 to extend in the distal direction of the housing under the trigger of the trigger assembly 5, and in the process of switching from the energy storage state to the firing state, the biopsy needle assembly 1 performs biopsy sampling; the trigger assembly 5 is used to trigger the firing assembly 6, and is assembled on the proximal side of the firing assembly 6 on the housing, and the trigger assembly 5 has an initial position and a trigger position moving along the distal direction of the housing to trigger the firing assembly 6 to switch from the energy storage state to the firing state; the locking assembly includes a locking piece 19, which is rotatably installed on the proximal side of the housing, and the locking piece 19 has an unlocking position and a locking position, and the locking position is that the locking piece 19 is inserted between the trigger assembly 5 and the firing assembly 6 along the circumferential direction of the housing, and when the locking piece 19 is in the locking position, the locking piece 19 blocks the trigger assembly 5 from moving to the trigger position, and a fixed support disc is formed in the housing, and the fixed support disc is arranged such that the distal end of the locking piece 19 abuts against the fixed support disc 20 when the locking piece 19 is rotated to the locking position.

[0049] In the embodiment, the biopsy needle assembly 1 is internally provided with a hollow sensor assembly channel 1013, and the first electromagnetic navigation sensor 11 is extended to the target position at the distal end of the sensor assembly channel 1013, so that the biopsy needle assembly 1 of the embodiment can position (position and attitude) the biopsy needle assembly 11 inserted into the human body through the first electromagnetic navigation sensor 11 under the navigation device, so that the operator can quickly and accurately insert the biopsy needle assembly 1 into the target sampling position (target point) of the tissue in the human body, that is, the efficiency and accuracy of the biopsy are improved.

[0050] In the embodiment, the locking position is arranged between the trigger assembly 5 and the firing assembly 6, that is, the locking position is arranged on the trigger path, so that even if the operator is mistaken, the trigger force borne by the locking piece 19 is much smaller than the firing force in the related art, and the damage and failure of the locking piece 19 are avoided; on the other hand, the locking piece 19 is horizontally rotatably arranged in the housing, and the horizontal rotatable arrangement can reduce the vertical space occupation, which is beneficial to reduce the vertical size of the biopsy needle as a whole; on the other hand, the distal end surface of the locking piece 19 of the locking position is supported by the fixed support disc 20, so that the locking piece 19 can bear a larger axial force and is less likely to be deformed, compared with the cantilever beam scheme of penetrating the housing to extend into the trigger path to lock the trigger assembly 5, the scheme of the utility model that the locking piece 19 is rotatably inserted into the trigger path and supported by the fixed support disc 20 can bear a larger axial force and is less likely to be deformed, and importantly, the left and right sides of the housing do not need to be holed, so that the overall strength of the product is not reduced due to the strength reduction of the housing caused by the holed.

[0051] In the use of the full-automatic biopsy needle of the embodiment to perform biopsy, the operator first needs to assemble the first electromagnetic navigation sensor 11 to the biopsy needle assembly 1, specifically, the operator can first adjust the biopsy needle assembly 1 to the energy storage state, that is, the firing assembly 6 is driven to retract the biopsy needle assembly 1 to the energy storage state in the proximal direction of the housing by pressing the key, then the distal end of the first electromagnetic navigation sensor 11 is extended to the target position at the distal end of the sensor assembly channel 1013, and the proximal end of the first electromagnetic navigation sensor 11 is connected to the navigation device from the proximal end of the full-automatic biopsy needle, at this time, after being powered on, the navigation device can identify the spatial position (position and attitude) of the first electromagnetic navigation sensor 11, and then determine the spatial position (position and attitude) of the needle tip 1012 and the sampling groove 1014 according to the specific size relationship between the target position at the distal end of the sensor assembly channel 1013 and the needle tip 1012 and the sampling groove 1014 of the biopsy needle assembly 1. Then the operator can select a body surface needle insertion point, adjust the needle insertion path according to the navigation, confirm that the target point of the pre-puncture is on the needle insertion path, and then insert the biopsy needle assembly into the target point of the human body along the needle insertion path.

[0052] It should be noted that in some embodiments, the navigation device reserves the firing distance of the biopsy needle assembly 1, that is, when the crosshair of the biopsy needle assembly 1 is located at the pre-puncture target point according to the navigation, the position of the needle tip 1012 of the biopsy needle assembly 1 is actually still away from the target position by a firing distance, at this time, the operator controls the firing assembly 6 to drive the biopsy needle assembly 1 to switch from the energy storage state to the firing state, and the needle tip 1012 and the sampling groove 1014 of the biopsy needle assembly 1 will just penetrate into the target sampling position (the target position).

[0053] It should also be noted that before firing, the locking assembly is always in the locked position, which is to prevent the operator from triggering by mistake. When the crosshair of the biopsy needle assembly 1 is aimed at the pre-puncture target point, the locking assembly is switched from the locked position to the unlocked position, the trigger assembly 5 is operated to trigger the firing assembly 6, the firing assembly 6 is switched from the energy storage state to the firing state, and the target tissue sampling is completed.

[0054] Further, the locking assembly in the embodiment further includes a locking key 21 assembled on the housing, the locking key 21 is fixedly connected with the locking piece 19 or is an integral structure, a waist-shaped hole extending along the axial direction of the housing is formed on the housing, and the locking key 21 is rotatably installed in the waist-shaped hole. When the locking key 21 moves in the waist-shaped hole, the locking piece 19 can be switched between the unlocked position and the locked position. Considering the strength of the locking assembly, preferably, the locking key 21 and the locking piece 19 are an integral structure, but the utility model is not limited in this way, and in other embodiments, the locking key 21 and the locking piece 19 can be two independent components which are fixedly connected through a fixed connection structure. The form of the fixed connection structure is not limited and can be clamping, bonding or the like.

[0055] In the embodiment, the trigger assembly 5 includes a rear trigger key 3 and a trigger connecting rod 15. The rear trigger key 3 is pressingly installed on the proximal end face of the housing, and the trigger connecting rod 15 is installed in the housing and located on the distal end side of the rear trigger key 3. When the operator presses the rear trigger key 3, the rear trigger key 3 drives the trigger connecting rod 15 to move from the initial position to the trigger position, the trigger connecting rod 15 triggers the firing assembly 6 when it moves to the trigger position, the firing assembly 6 is switched from the energy storage state to the firing state, and the biopsy needle assembly 1 is driven to extend outwardly to the distal end of the housing for biopsy sampling.

[0056] Further, when the locking piece 19 moves to the locked position, the operator presses the rear trigger key 3, the trigger connecting rod 15 presses the proximal end face of the locking piece 19, the distal end face of the locking piece 19 abuts against the fixed support disc 20, the locking piece 19 is clamped between the trigger connecting rod 15 and the fixed support disc 20, the trigger connecting rod 15 is blocked from moving to the trigger position, and the biopsy needle assembly 1 in the fully automatic biopsy needle cannot be ejected for sampling before being unlocked, so that the biopsy needle assembly 1 can reach the target position for biopsy sampling, and the accuracy of the sampling result is ensured.

[0057] Further, the locking piece 19 is used for inserting the end face of the insertion end between the trigger assembly 5 and the firing assembly 6 is profiled with an avoidance slope 191 for cooperating with the trigger link 15. During biopsy sampling, there are sometimes multiple sampling cases. After multiple firing of the fully automatic biopsy needle, the automatic return function effect of the trigger link 15 may be reduced, so that the trigger link 15 cannot be accurately returned to the initial position. At this time, when the locking piece 19 is rotated and inserted between the trigger link 15 and the firing assembly 6, the trigger link 15 which is not returned to the initial position is easy to block the locking piece 19 from moving to the locking position. The design of the avoidance slope 191 can leave a certain size, so that when the locking piece 19 moves to the locking position, the end of the trigger link 15 first contacts the avoidance slope 191. With the auxiliary action of the avoidance slope 191, the trigger link 15 can be pushed in the initial position direction, so as to facilitate the locking piece 19 to move to the locking position through the avoidance slope 191, and better lock the fully automatic biopsy needle.

[0058] In this embodiment, the shell includes an outer shell 2 and an inner shell, the inner shell is formed by a first inner shell 7 and a second inner shell 8, the outer shell 2 is sleeved outside the inner shell, the inner shell includes a firing assembly installation cavity at the distal end side and a trigger assembly installation cavity at the proximal end side, and a biopsy needle assembly installation cavity located at one side of the firing assembly installation cavity and the trigger assembly installation cavity and penetrating through the inner shell and the outer shell 2, the firing assembly 6, the trigger assembly 5 and the biopsy needle assembly 1 are respectively assembled in the firing assembly installation cavity, the trigger assembly installation cavity and the biopsy needle assembly installation cavity.

[0059] Further, as shown in Figure 4 , Figure 5 and Figure 7 , the fixed support disc 20 is the cavity wall of the trigger assembly installation cavity at the distal end side, and a first clamping hole 16 is profiled in the middle of the fixed support disc 20 for the firing assembly 6 to extend and be clamped at the extending end of the firing assembly 6. The firing assembly 6 extends from the first clamping hole 16 when in the energy storage state. When the extending end of the firing assembly 6 is clamped in the first clamping hole 16, the firing assembly 6 remains in the energy storage state. When the trigger link 15 in the trigger assembly 5 moves to the trigger position, the extending end of the firing assembly 6 can be separated from the first clamping hole 16, so that the firing assembly 6 is switched from the energy storage state to the firing state.

[0060] In the embodiment, the trigger link 15 has a pair of elastic fins 52 extending to both sides, a blocking wall is formed in the trigger assembly mounting cavity for resisting the elastic fins 52, when the trigger link 15 moves from the initial position to the trigger position, the blocking wall resists the elastic fins 52 to deform the elastic fins 52 to store energy, after the rear trigger key 3 is released from driving the trigger link 15, the trigger link 15 drives the rear trigger key 3 to automatically move from the trigger position to the initial position under the restoring action of the deformed elastic fins 52, so that the rear trigger key 3 and the trigger link 15 can automatically reset. Further, after the fully automatic biopsy needle is fired multiple times, the elastic fins 52 may be elastic fatigue, so that the trigger link 15 and the rear trigger key 3 cannot reset to the initial position, at this time, when the locking member 19 is rotated and inserted between the trigger link 15 and the firing assembly 6, the trigger link 15 which is not reset to the initial position is easily blocked, so that the locking member 19 cannot move to the locking position, and the design of the avoidance slope 191 can leave a certain size, so that when the locking member 19 moves to the locking position, the end of the trigger link 15 first contacts the avoidance slope 191, and under the auxiliary action of the avoidance slope 191, the trigger link 15 can be pushed to the initial position direction, so that the locking member 19 moves to the locking position through the avoidance slope 191, better locking the fully automatic biopsy needle.

[0061] In the embodiment, the firing assembly 6 and the trigger assembly 5 are arranged in the housing, the firing assembly 6 is connected with the biopsy needle assembly 1, the firing assembly 6 has an energy storage state of retracting the biopsy needle assembly 1 into the housing, and the firing assembly 6 also has a firing state of making the needle core 101 and the needle tube 102 of the biopsy needle assembly 1 pop out in sequence, the firing assembly 6 drives the needle core 101 and the needle tube 102 to extend outward in the direction of the distal end of the housing in sequence, so that there is a time difference in the extension process of the needle core 101 and the needle tube 102, so that the needle core 101 and the needle tube 102 complete biopsy sampling; the trigger assembly 5 can drive the firing assembly 6 to switch from the energy storage state to the firing state.

[0062] Further, the trigger assembly 5 further includes a third sliding block 51 formed on the trigger link 15, and the elastic fins 52 extend from both sides of the third sliding block 51, when the operator presses the rear trigger key 3, the rear trigger key 3 drives the trigger link 15 and the third sliding block 51 to slide from the initial position to the trigger position, so as to drive the firing assembly 6 to switch from the energy storage state to the firing state.

[0063] In the embodiment, the firing assembly 6 comprises a first sub-firing assembly 61 and a second sub-firing assembly 62, the firing assembly mounting cavity comprises a first cavity and a second cavity, the first sub-firing assembly 61 is mounted in the first cavity, the second sub-firing assembly 62 is mounted in the second cavity, the needle core 101 is connected to the first sub-firing assembly 61, the needle tube 102 is connected to the second sub-firing assembly 62, and the first sub-firing assembly 61 and the second sub-firing assembly 62 enter the firing state in sequence to make the needle core 101 and the needle tube 102 pop out in a preset order.

[0064] Further, as shown in Figure 6 , the first sub-firing assembly 61 comprises a first slider 611 and a first elastic member 612, and the second sub-firing assembly 62 comprises a second slider 621 and a second elastic member 622; the needle core 101 is fixedly connected to the first slider 611, the first slider 611 has an energy storage state in the first cavity in which the first elastic member 612 is compressed to make the needle core 101 retract, and the first slider 611 also has a firing state in the first cavity in which the needle core 101 is driven to pop out under the elastic force of the first elastic member 612; the needle tube 102 is fixedly connected to the second slider 621, the second slider 621 is slidingly mounted in the second cavity, the second slider 621 has an energy storage state in the second cavity in which the second elastic member 622 is compressed to make the needle tube 102 retract, and the second slider 621 also has a firing state in the second cavity in which the needle tube 102 is driven to pop out under the elastic force of the second elastic member 622.

[0065] Specifically, as shown in Figure 7 and Figure 8 , the first end of the first slider 611 has a first clamping portion, the first cavity has a first clamping hole 16 matched with the first clamping portion, when the first clamping portion is clamped into the first clamping hole 16, the first slider 611 enters the energy storage state, when the first clamping portion is separated from the first clamping hole 16, the first slider 611 enters the firing state, the trigger assembly 5 can drive the first clamping portion to separate from the first clamping hole 16, so that the first slider 611 enters the firing state from the energy storage state and drives the needle core 101 to pop out; the first end of the second slider 621 has a second clamping portion, the second cavity has a second clamping hole 17 matched with the second clamping portion, when the second clamping portion is clamped into the second clamping hole 17, the second slider 621 enters the energy storage state, when the second clamping portion is separated from the second clamping hole 17, the second slider 621 enters the firing state, when the first slider 611 slides to the distal end of the first cavity, the second clamping portion can be pushed out of the second clamping hole 17, so that the second clamping portion is separated from the second clamping hole 17, the second slider 621 enters the firing state and drives the needle tube 102 to pop out.

[0066] In the embodiment, as shown in Figure 8As shown, the first end of the first slider 611 is shaped with a first elastic clamping block 6111, the first elastic clamping block 6111 passes through the first clamping hole 16 and is clamped on the side of the first clamping hole 16, so that the first slider 611 remains in the energy storage state. When the third slider 51 slides to the trigger position, the first elastic clamping block 6111 is separated from the first clamping hole 16, the first slider 611 enters the firing state, and drives the needle core 101 to extend outwardly away from the shell; the first end of the second slider 621 is shaped with a second elastic clamping block 6211, the second elastic clamping block 6211 passes through the second clamping hole 17 and is clamped on the side of the second clamping hole 17, so that the second slider 621 remains in the energy storage state. When the first slider 611 slides to the tail end of the first cavity, the end of the first slider 611 extrudes the second elastic clamping block 6211, so that the second elastic clamping block 6211 is separated from the second clamping hole 17, the second slider 621 enters the firing state, and drives the needle tube 102 to extend outwardly away from the shell. When the needle core 101 and the needle tube 102 extend outwardly away from the shell, the biopsy sampling of the target position is completed.

[0067] In this embodiment, the outer diameter of the first elastic clamping block 6111 away from the trigger assembly 5 is greater than the outer diameter of the first elastic clamping block 6111 close to the trigger assembly 5. When the first slider 611 is in energy storage, the first elastic clamping block 6111 is offset radially inward under the extrusion of the side wall of the first clamping hole 16, so that the first elastic clamping block 6111 can enter the first clamping hole 16 and pass through the first clamping hole 16. After the first elastic clamping block 6111 passes through the first clamping hole 16, it is no longer extruded by the side wall of the first clamping hole 16, and the first elastic clamping block 6111 is offset radially outward under the elastic action of itself to expand, so that the first elastic clamping block 6111 is clamped on the side of the first clamping hole 16, blocking the first elastic clamping block 6111 from sliding out of the first clamping hole 16, so that the first slider 611 remains in the energy storage state.

[0068] Similarly, the outer diameter of the second elastic clamping block 6211 away from the first slider 611 is greater than the outer diameter of the second elastic clamping block 6211 close to the first slider 611. When the second slider 621 is in energy storage, the second elastic clamping block 6211 is offset radially inward under the extrusion of the side wall of the second clamping hole 17, so that the second elastic clamping block 6211 can enter the second clamping hole 17 and pass through the second clamping hole 17. After the second elastic clamping block 6211 passes through the second clamping hole 17, it is no longer extruded by the side wall of the second clamping hole 17, and the second elastic clamping block 6211 is offset radially outward under the elastic action of itself to expand, so that the second elastic clamping block 6211 is clamped on the side of the second clamping hole 17, blocking the second elastic clamping block 6211 from sliding out of the second clamping hole 17, so that the second slider 621 remains in the energy storage state.

[0069] In the embodiment, the first cavity and the second cavity are through, and the first cavity and the second cavity are arranged in the moving direction of the needle core 101 and the needle body 1011, so that the first slider 611 and the second slider 621 facilitate the movement of the needle core 101 and the needle body 1011 when sliding in the first cavity and the second cavity. At the same time, when the first slider 611 slides to the tail end of the first cavity, the second elastic clamping block 6211 can be pressed, so that the second slider 621 switches from the energy storage state to the firing state, so that the second slider 621 drives the needle tube 102 to extend outwardly away from the shell.

[0070] In other embodiments, the first cavity and the second cavity can also be separately arranged, and the first slider 611 and the second slider 621 are triggered separately, as long as the first slider 611 and the second slider 621 are triggered in sequence.

[0071] In the embodiment, the inner shell includes a first inner shell 7 and a second inner shell 8, and the first inner shell 7 and the second inner shell 8 are snap-fitted. The first inner shell 7 and the second inner shell 8 are both mounted in the shell, and the first cavity and the second cavity are formed in the internal space of the first inner shell 7 and the second inner shell 8, which facilitates the rational use of the internal space of the shell. The first cavity and the second cavity are formed by assembling the first inner shell 7 and the second inner shell 8, which reduces the processing cost of the shell and increases the applicability of the shell. Other models of the first inner shell 7 and the second inner shell 8 can also be assembled to install biopsy needle assemblies 1 of different specifications (thickness and length of needle core and needle tube).

[0072] In the embodiment, the first elastic clamping block 6111 has a first inclined surface 6112 at the end portion facing the third slider 51. The inclination direction of the first inclined surface 6112 is inclined upward from the direction close to the third slider 51 to the direction away from the third slider 51. The radial dimension of the first inclined surface 6112 is smaller than the inner diameter of the first clamping hole 16, so that when the first slider 611 slides, the first inclined surface 6112 first enters the first clamping hole 16. As the first inclined surface 6112 gradually enters, the inner wall of the first clamping hole 16 starts to press the first inclined surface 6112, so that the first elastic clamping block 6111 contracts radially inward, and finally completely enters the first clamping hole 16. After passing through the first clamping hole 16, the first elastic clamping block 6111 expands radially outward under the action of its own elastic force and recovers deformation. At this time, the radial dimension of the end portion of the first elastic clamping block 6111 facing the first clamping hole 16 is greater than the inner diameter of the first clamping hole 16, which prevents the first elastic clamping block 6111 from separating from the first clamping hole 16, so that the first slider 611 remains in the energy storage state.

[0073] Further, the third slider 51 has a second inclined surface 511 matching the first inclined surface 6112 at the end of the first slider 611. During the process of sliding the third slider 51 to the trigger position, the first elastic clamping block 6111 moves radially inward under the extrusion of the second inclined surface 511, so that the radial dimension of the first elastic clamping block 6111 is less than or equal to the inner diameter of the first clamping hole 16, so that the first elastic clamping block 6111 can escape from the restriction of the first clamping hole 16 and enter the first clamping hole 16, and the first slider 611 is switched from the energy storage state to the firing state under the elastic force of the first elastic member 612, driving the needle core 101 to pop out to the distal end of the shell.

[0074] In the embodiment, the second elastic clamping block 6211 has a third inclined surface 6212 at the end of the first slider 611. The third inclined surface 6212 is inclined upward from the direction close to the first slider 611 to the direction away from the first slider 611, and the radial dimension of the third inclined surface 6212 is less than the inner diameter of the second clamping hole 17, so that when the second slider 621 slides, the third inclined surface 6212 first enters the second clamping hole 17, and as the third inclined surface 6212 gradually enters, the inner wall of the second clamping hole 17 begins to extrude the third inclined surface 6212, so that the second elastic clamping block 6211 contracts radially inward, and finally completely enters the second clamping hole 17. After passing through the second clamping hole 17, the second elastic clamping block 6211 expands radially outward under the action of its own elastic force and recovers deformation. At this time, the radial dimension of the second elastic clamping block 6211 towards the end of the second clamping hole 17 is greater than the inner diameter of the second clamping hole 17, preventing the second elastic clamping block 6211 from escaping from the second clamping hole 17, so that the second slider 621 remains in the energy storage state.

[0075] Further, the first slider 611 has a fourth inclined surface 18 matching the third inclined surface 6212 at the end of the second slider 621. During the process of sliding the first slider 611 to the tail end of the first cavity, the second elastic clamping block 6211 moves radially inward under the extrusion of the fourth inclined surface 18, so that the radial dimension of the second elastic clamping block 6211 is less than or equal to the inner diameter of the second clamping hole 17, so that the second elastic clamping block 6211 can escape from the restriction of the second clamping hole 17 and enter the second clamping hole 17, and the second slider 621 is switched from the energy storage state to the firing state under the elastic force of the second elastic member 622, driving the needle tube 102 to pop out to the distal end of the shell.

[0076] In the embodiment, as Figure 2 and Figure 9As shown, the biopsy needle assembly 1 comprises a needle core 101 and a needle tube 102 slidingly sleeved outside the needle core 101, the needle core 101 comprises a needle body 1011 and a needle tip 1012, the needle body 1011 is internally formed with a sensor assembly channel 1013 extending along the length direction of the needle body 1011, the first electromagnetic navigation sensor 11 can be inserted into the sensor assembly channel 1013 through the proximal end opening of the needle body 1011, so that during the biopsy, the first electromagnetic navigation sensor 11 can be inserted into the distal target position of the needle body 1011 from the proximal end opening of the needle body 1011, close to the position of the needle tip 1012, so that when the biopsy needle is inserted into the human body, the operator can identify the spatial position of the first electromagnetic navigation sensor 11 in the human body by using the navigation device, and then accurately calculate the spatial position of the needle tip 1012 and the sampling groove 1014 in the human body by using the size relationship between the first electromagnetic navigation sensor 11, the needle tip 1012 and the sampling groove 1014 in the biopsy needle assembly 1, wherein the positions of the needle tip 1012 and the sampling groove 1014 can be determined according to their own sizes and the positional relationship relative to the first electromagnetic navigation sensor 11, the navigation device can compensate the data of the needle tip 1012 and the sampling groove 1014 relative to the first electromagnetic navigation sensor 11, and then determine the position of the needle tip 1012 according to the position of the first electromagnetic navigation sensor 11, and then determine the distance between the needle tip 1012 and the target position through the first electromagnetic navigation sensor 11, so as to accurately sample at the target position. Wherein, the proximal end refers to the end close to the operator, and the distal end refers to the end away from the operator.

[0077] In the embodiment, a fixed protection tube 14 is further arranged in the shell, the fixed protection tube 14 is arranged in alignment with the sensor assembly channel 1013, the first electromagnetic navigation sensor 11 is guided to extend into the sensor assembly channel 1013 through the fixed protection tube 14, the fixed protection tube 14 penetrates through the elastic fin 52, the elastic fin 52 is formed with an avoidance hole through which the fixed protection tube 14 penetrates and which avoids interference with the fixed protection tube 14 when the trigger link 15 moves, the fixed protection tube 14 is arranged corresponding to the needle body 1011 from the avoidance hole, the diameter of the avoidance hole is slightly larger than the outer diameter of the fixed protection tube 14, so that when the trigger link 15 drives the elastic fin 52 to deform during the sliding process, the avoidance hole can move slightly on the fixed protection tube 14, avoiding that the avoidance hole of the elastic fin 52 is tightly sleeved on the fixed protection tube 14 and cannot move, affecting the sliding of the trigger link 15.

[0078] In order to precisely and conveniently assemble the first electromagnetic navigation sensor 11, in the embodiment, a connecting through hole 12 is formed in the proximal end of the shell, the connecting through hole 12 is in communication with the sensor assembly channel 1013, a first connecting piece is mounted on the connecting through hole 12, the first connecting piece is internally formed with a channel suitable for the first electromagnetic navigation sensor 11 to pass through, the first connecting piece is arranged to be fixed relative to the first electromagnetic navigation sensor 11 when the first electromagnetic navigation sensor 11 passes through the channel and extends to the target position at the distal end of the sensor assembly channel 1014, and the proximal end of the first electromagnetic navigation sensor 11 is adapted to pass out of the first connecting piece and be connected to the navigation device.

[0079] In view of the fact that the first electromagnetic navigation sensor may be damaged or affect the accuracy of the operation when the surgeon performs the biopsy or the navigation device works (for example, needs to be moved), for example, the surgeon rotates the shell (also referred to as the handle) of the full-automatic biopsy needle, or the navigation device is accidentally touched to cause the first electromagnetic navigation sensor to be twisted, which may cause the first electromagnetic navigation sensor to be damaged by external torque, therefore, in the embodiment, the connection between the first connecting piece and the connecting through hole 12 is arranged such that the first connecting piece can rotate relative to the connecting through hole under external torque. In this way, when the shell is subjected to external torque, the first electromagnetic navigation sensor 11 can rotate relative to the shell and the biopsy needle assembly 1 to adapt to the external torque, thereby avoiding damage to the first electromagnetic navigation sensor 11 or affecting the positioning accuracy.

[0080] Further specifically, in the embodiment, the distal end of the first connecting piece is provided with a connecting cap, the connecting cap is inserted into the connecting through hole 12, and an annular groove is arranged on the side wall of the connecting cap. Correspondingly, a positioning protrusion 23 is arranged on the inner wall of the connecting through hole 12, the positioning protrusion 23 and the annular groove are matched, and the first connecting piece fixed relative to the first electromagnetic navigation sensor 11 can rotate relative to the connecting through hole under the cooperation of the positioning protrusion 23 and the annular groove when the first electromagnetic navigation sensor 11 is subjected to external torque.

[0081] Still further specifically, the proximal end of the first electromagnetic navigation sensor 11 is sleeved with a second connecting piece, the distal end of the first electromagnetic navigation sensor 11 passes through the second connecting piece, the first electromagnetic navigation sensor 11 is fixedly connected to the second connecting piece, the proximal end of the first electromagnetic navigation sensor 11 passes out of the second connecting piece and is detachably connected to the navigation device, and the distal end of the second connecting piece is detachably connected to the proximal end of the first connecting piece. In this way, when the first electromagnetic navigation sensor 11 needs to be assembled, the surgeon can hold the second connecting piece, connect the distal end of the second connecting piece to the proximal end of the first connecting piece mounted on the connecting through hole, and thus complete the assembly of the first electromagnetic navigation sensor 11 on the full-automatic biopsy needle.

[0082] In order to further ensure the accuracy of the assembly, the connection between the second connecting member and the first connecting member is arranged such that when the two are connected in place, the distal end of the first electromagnetic navigation sensor 11 just extends into the target position of the sensor assembly channel 1014.

[0083] As a preferred embodiment of the present embodiment, the distal end of the second connecting member is connected to the proximal end of the first connecting member in a quick release manner. Specifically, the distal end of the second connecting member is arranged as a plug, and the proximal end of the first connecting member is arranged as a socket. During assembly, the plug can be quickly inserted into the socket to achieve connection. Of course, the positions of the plug and the socket can be interchanged. It should be noted that the connection between the distal end of the second connecting member and the proximal end of the first connecting member can be a fixed connection or a rotating connection, and the present utility model does not limit this.

[0084] As a preferred embodiment of the present embodiment, the first connecting member is a first connecting tube, and the second connecting member is a second connecting tube (not shown in the figure). The inner diameter of the first connecting tube is larger than the outer diameter of the first electromagnetic navigation sensor 11, i.e., there is a gap between the first connecting tube and the first electromagnetic navigation sensor 11. This makes it more convenient for the first electromagnetic navigation sensor to pass in, and the inner wall of the second connecting tube is fixed to the first electromagnetic navigation sensor 11.

[0085] As an example of the above preferred embodiment, the first electromagnetic navigation sensor 11 is an elongated wire, and the second connecting tube can have a split structure, which includes a first connecting sub-tube on the distal side and an insulating sheath wrapped outside the wire on the proximal side. The wire is fixed in the insulating sheath. The first connecting sub-tube of the second connecting tube and the first connecting tube are both plastic transparent tubes. When the first electromagnetic navigation sensor 11 is manufactured, the wire without the insulating sheath on the distal side is inserted into the first connecting sub-tube, and then the distal end of the insulating sheath and the proximal end of the first connecting sub-tube are fixed together through a heat shrink tube (other fastening methods can also be used). When the first electromagnetic navigation sensor 11 is assembled, the operator holds the first connecting sub-tube or the insulating sheath outside the wire to insert the wire on the distal side into the first connecting tube until the distal wire extends into the distal end of the sensor assembly channel 1013 of the biopsy needle. Then the operator can quickly insert the distal end of the first connecting sub-tube into the proximal end of the first connecting tube. The distal end of the wire just extends into the target position at the distal end of the sensor assembly channel 1013, and the assembly of the first electromagnetic navigation sensor 11 is completed.

[0086] It should be noted that in the present embodiment, the sensor is preferably arranged at the distal end of the wire. However, the present utility model does not limit this, and in some other embodiments, the sensor can also have multiple sensors. In addition to being arranged at the distal end of the wire, it can also be arranged at other positions along the wire.

[0087] Further, in the embodiment, during actual assembly, the operator first connects the first connecting tube to the connecting hole 12 through the connecting cap, which provides an installation channel for installation of the first electromagnetic navigation sensor 11, then the operator holds the second connecting tube to extend the first electromagnetic navigation sensor 11 into the first connecting tube, and then fixes the distal end of the second connecting tube to the proximal end of the first connecting tube, at this time, the first electromagnetic navigation sensor 11 is just extended to the target position at the distal end of the sensor assembly channel 1014.

[0088] Further specifically, the proximal end of the first electromagnetic navigation sensor 11 is provided with a quick plug female head, and the navigation device is provided with a quick plug male head for cooperating with the quick plug female head, the quick plug female head and the quick plug male head can form a fixed mechanical connection, and at the same time, the quick plug female head and the quick plug male head also realize the electrical connection between the first electromagnetic navigation sensor 11 and the navigation device. The positions of the quick plug female head and the quick plug male head can be interchanged.

[0089] The utility model does not limit the detachable fixed connection of the distal end of the second connecting tube and the proximal end of the first connecting tube, which can be quick plug fixed connection or threaded connection, as long as it can realize the fixed and detachable connection of the second connecting tube and the first connecting tube.

[0090] In actual use, the first connecting tube and the full-automatic biopsy needle are a set, and the first electromagnetic navigation sensor 11 and the second connecting tube are a set. The full-automatic biopsy needle has different length specifications according to different actual conditions, while the length of the first electromagnetic navigation sensor 11 is usually fixed. In order to make the first electromagnetic navigation sensor 11 be able to extend to the target position of the full-automatic biopsy needle with different length specifications, in the embodiment, the first connecting tube is designed to have different length specifications to match the full-automatic biopsy needle with different length specifications (for example, when the full-automatic biopsy needle is relatively short, the length of the first connecting tube is relatively long), so as to ensure that the first electromagnetic navigation sensor 11 can extend to the target position of the full-automatic biopsy needle after the first connecting tube and the second connecting tube are connected.

[0091] In the embodiment, a fixed protection tube 14 is arranged at the proximal end of the shell, the proximal end of the biopsy needle assembly 1 extends into the fixed protection tube 14, the fixed protection tube is used for protecting the biopsy needle assembly 1 and guiding the first electromagnetic navigation sensor 11 to extend into the sensor assembly channel 1013 when the first electromagnetic navigation sensor 11 is assembled, wherein the fixed protection tube 14 is arranged in the shell through the avoiding hole on the elastic fin 52. By arranging the fixed protection tube 14, on the one hand, the first electromagnetic navigation sensor 11 is protected from being damaged by other components in the shell, and on the other hand, the assembly of the first electromagnetic navigation sensor 11 is guided, so that the operator can more easily extend the first electromagnetic navigation sensor 11 into the target position of the sensor channel 1013.

[0092] In order to accurately position the positions of the needle tip 1012 and the sampling groove 1014, in the embodiment, further, the center of the fixed protection tube 14, the connecting through hole 12 and the center of the sensor assembly channel 1013 are aligned, which on the one hand can ensure that the center of the first electromagnetic navigation sensor 11 is aligned with the center of the sensor assembly channel 1013 during assembly, thereby facilitating the navigation device to obtain the spatial positions of the needle tip 1012 and the sampling groove 1014 according to the specific spatial position of the first electromagnetic navigation sensor 11 and the specific size and relative position relationship between the first electromagnetic navigation sensor 11 and the needle tip 1012 and the sampling groove 1014; on the other hand, the elongated first electromagnetic navigation sensor 11 does not fire together with the biopsy needle assembly 1 when firing, and since the firing assembly 6 is quickly fired (or said to be fired instantaneously) when switching from the energy storage state to the firing state, the firing force is large, and the quick and large firing force is easy to form a quick and large friction force of the biopsy needle assembly 1 on the first electromagnetic navigation sensor 11. After the center of the fixed protection tube 14 is aligned with the center of the sensor assembly channel 1013, the first electromagnetic navigation sensor 11 can extend to the distal end of the needle body 1011 along a straight line, and the friction force generated instantaneously when the needle body 1011 is ejected can be avoided to pull the first electromagnetic navigation sensor 11 off.

[0093] In the embodiment, the needle tube 102 is used to cooperate with the sampling groove 1014 on the needle tip 1012 to complete sampling.

[0094] Further, the end of the needle tube 102 is provided with a ring blade, and when the needle tube 102 slides relative to the needle body 1011, the ring blade can separate the tissue sample in the sampling groove 1014 from the tissue cutting to obtain the tissue sample in cooperation with the sampling groove 1014.

[0095] In the embodiment, the needle tip 1012 is detachably connected to the needle body 1011, the needle tip 1012 is a solid structure, and the sampling groove 1014 is arranged on the needle tip 1012. Further, the end of the needle body 1011 is provided with a plug-in connector, and the end of the needle tip 1012 is provided with a plug-in hole matched with the plug-in connector. The plug-in connector is inserted into the plug-in hole to realize the installation of the needle tip 1012 to the needle body 1011. Specifically, the plug-in connector can be a cylinder integrally formed with the needle body 1011, and the plug-in hole is a blind hole arranged on the needle tip 1012 and matched with the diameter of the cylinder. The cylinder is inserted into the blind hole to connect the needle tip 1012 to the needle body 1011, wherein the cylinder and the blind hole can be coated with glue or adhesive or welded to make the connection of the needle tip 1012 to the needle body 1011 more firm.

[0096] In the embodiment, the needle core 101 and the needle tube 102 are slidingly arranged, the needle tube 102 is slidingly sleeved outside the needle core 101, and the needle core 101 and the needle tube 102 slide in sequence. The needle core 101 moves to a target position first, the tissue at the target position is filled into the sampling groove 1014, and then the needle tube 102 slides relative to the needle core 101. During the sliding of the needle tube 102, the ring blade at the end of the needle tube 102 cuts and separates the tissue in the sampling groove 1014 from other tissues to complete the sampling work.

[0097] In the embodiment, a rubber sleeve can be sleeved at the end of the needle core 101 and the needle tube 102. When the fully automatic biopsy needle is not used, the rubber sleeve is sleeved at the end of the needle core 101 and the needle tube 102 to protect the end of the needle core 101 and the needle tube 102 and avoid damaging the needle tip 1012.

[0098] In the embodiment, the side trigger key 4 and the rear trigger key 3 are respectively arranged on the side and tail end of the handle formed by the shell, and the side trigger key 4 and the rear trigger key 3 are connected through the trigger connecting rod 15. The side trigger key 4 and the rear trigger key 3 move synchronously, and no matter which trigger key is pressed by the operator, the other trigger key moves synchronously. The trigger connecting rod 15 is connected with the third sliding block 51, and the side trigger key 4 and the rear trigger key 3 are connected with the third sliding block 51 through the trigger connecting rod 15. The trigger connecting rod 15 is slidingly arranged in the shell, so that the operator can drive the third sliding block 51 to move from the initial position to the trigger position through the trigger connecting rod 15 no matter the side trigger key 4 or the rear trigger key 3 is operated.

[0099] In the embodiment, the first pressing key 10 and the second pressing key 9 are also included, and the first pressing key 10 and the second pressing key 9 are both slidingly installed in the shell and at least partially exposed outside the shell, wherein the first pressing key 10 is fixedly connected with the first sliding block 611, and the second pressing key 9 is fixedly connected with the second sliding block 621, and the operator can control the first sliding block 611 to move inwardly to the energy storage state by pressing the first pressing key 10, and the operator can control the second sliding block 621 to move inwardly to the energy storage state by pressing the second pressing key 9.

[0100] Embodiment 2

[0101] The embodiment provides a specific implementation of a biopsy system based on electromagnetic positioning, which includes the fully-automatic biopsy needle, the second electromagnetic navigation sensor and the navigation device in the above embodiments. In use, the second electromagnetic navigation sensor is fixed on an ultrasonic probe, which can be a body surface probe or an intraoperative probe, and no limitation is made on this. The navigation device is configured to extract electromagnetic signals of the first electromagnetic navigation sensor 11 and the second electromagnetic navigation sensor, and determine the spatial positional relationship between the fully-automatic biopsy needle and the ultrasonic probe based on the electromagnetic signals.

[0102] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application embodiment. The present application is intended to cover any variations, uses or adaptive changes of the present application following the general principles of the present application and including general knowledge or conventional technical means in the art of the present application not expressly present in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A fully automatic biopsy needle, characterized in that, The application relates to a biopsy needle device. The device comprises a housing, a biopsy needle assembly, a firing assembly, a trigger assembly and a locking assembly. The biopsy needle assembly, the firing assembly, the trigger assembly and the locking assembly are assembled in the housing. The firing assembly has an energy storage state in which the biopsy needle assembly is retracted towards the proximal end of the housing and a firing state in which the biopsy needle assembly is extended towards the distal end of the housing under the trigger of the trigger assembly, and in the process of switching from the energy storage state to the firing state, the biopsy needle assembly performs biopsy sampling. The trigger assembly is used for triggering the firing assembly and is assembled on the proximal end side of the firing assembly on the housing. The trigger assembly has an initial position and a trigger position along the trigger path towards the distal end of the housing to trigger the firing assembly to switch from the energy storage state to the firing state.

2. The power biopsy needle of claim 1, wherein, The locking assembly comprises a locking member which is rotatably installed on the proximal end side of the housing.

3. The power biopsy needle of claim 1, wherein, The locking member has an unlocking position and a locking position in which the locking member is rotatably inserted between the trigger assembly and the firing assembly along the circumferential direction of the housing. In the locking position, the locking member blocks the movement of the trigger assembly to the trigger position.

4. The power biopsy needle of claim 3, wherein, The housing is formed with a fixed support disc.

5. The fully automatic biopsy needle according to claim 3 or 4, characterized in that The fixed support disc is arranged to abut against the distal end surface of the locking member when the locking member is rotated to the locking position.

6. The power biopsy needle of claim 5, wherein, The locking assembly further comprises a locking key assembled on the housing. The locking key is fixedly connected with the locking member or is an integral structure. The housing is provided with a waist-shaped hole extending along the circumferential direction of the housing. The locking key is rotatably installed in the waist-shaped hole along the circumferential direction of the housing and drives the locking member to switch between the unlocking position and the locking position. The trigger assembly comprises a rear trigger key and a trigger link. The rear trigger key is pressingly installed on the proximal end surface of the housing. The trigger link is installed on the distal end side of the rear trigger key in the housing. The rear trigger key drives the trigger link to move from the initial position to the trigger position. The trigger link triggers the firing assembly in the trigger position. In the locking position, the proximal end surface of the locking member abuts against the trigger link, and the distal end surface of the locking member is abutted by the fixed support disc. The end surface of the insertion end of the locking member is formed with a relief slope for cooperating with the trigger link. The housing comprises an outer shell and an inner shell. The outer shell is sleeved outside the inner shell. The inner shell comprises a firing assembly mounting cavity on the distal end side, a trigger assembly mounting cavity on the proximal end side and a biopsy needle assembly mounting cavity on one side of the firing assembly mounting cavity and the trigger assembly mounting cavity. The firing assembly, the trigger assembly and the biopsy needle assembly are respectively assembled in the firing assembly mounting cavity, the trigger assembly mounting cavity and the biopsy needle assembly mounting cavity. The fixed support disc is a cavity wall on the distal end side of the trigger assembly mounting cavity. The fixed support disc is formed with a first clamping hole in the middle part for the firing assembly to extend out of and be clamped with the extended end of the firing assembly. In the energy storage state, the firing assembly extends out of the first clamping hole.

7. The power biopsy needle of claim 5, wherein, The trigger link has a pair of elastic wings extending to both sides, a stop wall for resisting the elastic wings is formed in the trigger assembly mounting cavity, when the trigger link moves from the initial position to the trigger position, the stop wall resists the elastic wings to deform and store energy, after the rear trigger key is released from driving the trigger link, the trigger link drives the rear trigger key to automatically move from the trigger position to the initial position under the restoring action of the deformed elastic wings.

8. The power biopsy needle of claim 7, wherein, The biopsy needle assembly comprises a needle core and a needle tube slidingly sleeved outside the needle core; The firing assembly comprises a first sub-firing assembly arranged at the proximal end and a second sub-firing assembly arranged at the distal end, the firing assembly mounting cavity has a first cavity arranged at the proximal end and a second cavity arranged at the distal end, the fixed support disc is formed at the connection between the first cavity and the trigger assembly mounting cavity, the first sub-firing assembly is mounted in the first cavity, the second sub-firing assembly is mounted in the second cavity, the needle core is connected to the first sub-firing assembly, the needle tube is connected to the second sub-firing assembly, the first sub-firing assembly is switched from the energy storage state to the firing state by the trigger of the trigger assembly, and at the same time drives the needle core to pop out in the distal direction, the first sub-firing assembly triggers the second sub-firing assembly to switch from the energy storage state to the firing state when the first sub-firing assembly switches to the firing state, and at the same time drives the needle tube to pop out in the distal direction.

9. The power biopsy needle of claim 8, wherein, The first sub-firing assembly comprises a first slider and a first elastic member, and the second sub-firing assembly comprises a second slider and a second elastic member; The needle core is fixedly connected to the first slider, the first slider is slidingly mounted in the first cavity, and the first slider has an energy storage state in the first cavity for compressing the first elastic member to retract the needle core, and the first slider also has a firing state in the first cavity for driving the needle core to pop out; The needle tube is fixedly connected to the second slider, the second slider is slidingly mounted in the second cavity, and the second slider has an energy storage state in the second cavity for compressing the second elastic member to retract the needle tube, and the second slider also has a firing state in the second cavity for driving the needle tube to pop out.

Images