CN217853072U - Disposable full-automatic biopsy needle - Google Patents

Abstract

The application discloses a disposable full-automatic biopsy needle, wherein first hooks are symmetrically arranged on two sides of the tail of a needle tube seat, second hooks are symmetrically arranged on the tail of a needle core seat, and the first hooks and the second hooks are respectively contacted with a first baffle and a second baffle; the side surfaces of the needle tube seat and the needle core seat are respectively provided with a first connecting bulge and a second connecting bulge, the winding-up excitation device comprises a needle tube key and a needle core key, a connecting groove on the needle tube key is connected with the first connecting bulge, and a connecting groove on the needle core key is connected with the second connecting bulge; the needle tube key is provided with a limiting step, the needle core key is provided with a limiting bulge, and the limiting step limits the limiting bulge. The utility model discloses it stimulates the operation stably to go up the chord, and the first couple of needle tube seat and the second couple of nook closing member seat respectively with first baffle and the cooperation of second baffle contact on the inner shell, atress dispersion when going up the chord and arousing more has the equilibrium to restrict needle tubing button and nook closing member button operation order, improve the security.

Description

Disposable full-automatic biopsy needle

Technical Field

The utility model relates to a puncture equipment technical field, concretely relates to full-automatic biopsy needle of disposable.

Background

The biopsy needle is used for sampling and sucking living tissues of kidney, liver, lung, mammary gland, thyroid gland, prostate, pancreas, testis, uterus, ovary, body surface and the like, and can be used for sampling living tissues of cone tumor, unknown tumor and the like. The puncture needle used at present is a hollow and superfine circular tube-shaped structure and can be provided with a solid needle core, the solid needle core just fills the hollow part of the puncture needle, and the solid needle core prevents tissue debris and other non-target tissues from entering the hollow part of the puncture needle in the puncture process to interfere or influence the diagnosis result. The operation puncture operation needs to be finished under the guidance of the ultrasonic probe, an operator needs to hold the probe with one hand and carry out the puncture needle with the other hand, if the puncture needle without a solid needle core is used, tissue debris or non-target cells can easily enter the puncture needle, and the accuracy of judging the quality of a target is interfered or influenced; if the puncture needle with the solid needle core is used, the situation can be avoided as much as possible, but certain practical application problems exist, the solid needle core needs to be pulled out when the puncture needle reaches a target object, if an operator gives up holding the puncture needle to pull out the solid needle core and puts the needle core at a safe place, the puncture needle can be displaced due to the flexibility and elasticity of soft tissues, and important tissues and organs around the target object can be damaged. The full-automatic biopsy needle can complete puncture without manually pulling out the solid needle core. When the needle core and the needle tube are used, the corresponding two upper chord buttons are pressed respectively, so that the needle core and the needle tube are driven to contract to the limited positions, the spring is compressed, and the needle core and the needle tube are in a state to be excited at the moment. Under the guidance of ultrasonic imaging equipment, after the puncture position is determined, the trigger button is pushed, the needle core and the needle tube are released, the resilience force released by the spring drives the needle core and the needle tube to rapidly advance towards a focus area, the excitation of the needle core and the needle tube has time difference, namely, the needle core firstly enters the focus, and the needle tube enters later, so that a certain tissue sample is obtained in the inner needle sampling groove.

The existing full-automatic biopsy needle has the following problems: (1) When the upper chord is excited, stress imbalance exists, so that the stability is poor when the upper chord is triggered; (2) In the actual sampling process, the needle tube key is required to be pressed firstly, then the needle core key is pressed, the purposes of firstly removing the core and then discharging the tube are achieved, the tissue sample is taken out after sampling, the reverse operation cannot be realized, the operation of the winding button during the existing winding excitation has no operation sequence limitation, and potential safety hazards exist; (3) The triggering operation is inconvenient, and meanwhile, the operation risk of mistaken collision exists.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect of full-automatic biopsy needle, improve full-automatic biopsy needle and at last string stability of arousing, trigger operation's convenience and security, this application provides a safe, reliable full-automatic biopsy needle of disposable.

The utility model provides a technical scheme that above-mentioned problem adopted is:

the full-automatic biopsy needle comprises an operating handle device and an inner shell triggering mechanism, wherein the operating handle device comprises an outer shell, an upper chord exciting device, a safety lock catch and a triggering switch device, the inner shell triggering mechanism is arranged in the outer shell, the upper chord exciting device comprises a needle tube key and a needle core key, the inner shell triggering mechanism comprises an inner shell and a movable assembly, the movable assembly comprises a needle tube seat, a needle core seat, a front spring, a rear spring, a needle tube and a needle core, the tail part of the needle tube is connected with the needle tube seat, the tail part of the needle core is connected with the needle core seat, the needle tube seat and the needle core seat are assembled in the inner shell, the inner shell comprises an upper inner shell and a lower inner shell, a first baffle and a second baffle are arranged in the upper inner shell and the lower inner shell, the front spring and the rear spring are respectively sleeved on the needle tube seat and the needle core seat, first hooks are symmetrically arranged on two sides of the tail part of the needle tube seat, second hooks are symmetrically arranged on two sides of the tail part of the needle tube seat, and are respectively contacted with the first baffle and the second baffle; the side surfaces of the needle tube seat and the needle core seat are respectively provided with a first connecting bulge and a second connecting bulge, the winding excitation device comprises a needle tube key and a needle core key, a connecting groove on the needle tube key is connected with the first connecting bulge, and a connecting groove on the needle core key is connected with the second connecting bulge.

As a preferred mode, the needle tube key is provided with a limiting step, the needle core key is provided with a limiting bulge, and the limiting step limits the limiting bulge.

As a preferred mode, an upper inner shell inner hole and a lower inner shell inner hole are respectively arranged in the upper inner shell and the lower inner shell behind the first baffle, and an upper cushion and a lower cushion are respectively arranged in the upper inner shell inner hole and the lower inner shell inner hole. Go up the cushion and play the cushioning effect with lower cushion, prevent to trigger the back strength too big, improve and trigger stability.

As a preferred mode, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are assembled by an upper buckle and a lower buckle, the combination line is arranged on the side face of the handle, and the lower shell is provided with an anti-skidding bulge. The bonding line is positioned on the side surface of the handle, so that the gloves can be prevented from being scratched during sampling.

As a preferred mode, the front end and the rear end of the needle core seat are respectively provided with a front needle core seat touch inclined plane and a rear needle core seat touch inclined plane, and the rear end of the needle tube seat is provided with a needle tube seat touch inclined plane.

As a preferable mode, the trigger switch device comprises a bottom switch and a middle switch, the bottom switch comprises a touch part and a pressing part, and the touch part is provided with a touch inclined plane matched with the rear touch inclined plane of the needle core seat; a limiting part is arranged between the touch part and the pressing part, the limiting part is in a double-wing shape, and the limiting part is abutted against the inner wall of the shell; one side of a touch part of the bottom switch is connected with the connecting strip, the connecting strip upwards extends to the middle of the shell, and the middle switch is fixed in the front of the connecting strip and located in a switch mounting groove of the shell.

As a preferable mode, the tail parts of the upper casing and the lower casing are provided with a bottom switch mounting groove, and the outer end face of the pressing part of the bottom switch is located in the bottom switch mounting groove. The bottom switch is concave to prevent mistakenly touching the bottom switch.

As a preferable mode, the safety lock catch comprises a locking part and operating parts symmetrically arranged at two sides of the locking part, an upper shell and a lower shell of the shell are respectively provided with an upper stopping groove and a lower stopping groove, and the operating parts fall into the upper stopping grooves or the lower stopping grooves; the locking portion of the safety catch is located between the touch portion 411 of the bottom switch and the upper inner case.

As a preferred mode, the front ends of the upper shell and the lower shell are provided with needle opening seats, the needle opening seats are respectively connected with the upper shell and the lower shell in a clamping mode, and the needle core and the needle tube penetrate out of a needle tube channel on the needle opening seats. The needle mouth seat makes epitheca and inferior valve connect more firmly, and airtight shell front end simultaneously, the needle tubing passageway is to the needle tubing pinpoint, and the shake when preventing to take a sample makes the sample more accurate.

As a preferable mode, the front part of the needle tube is provided with an embossing used for indicating the length, and the embossing can be used for realizing accurate positioning under the ultrasonic guidance, so that the accuracy of a sampling position is ensured, and the operation time is saved.

As a preferred mode, the needle tube key and the needle core key are numbered sequentially.

The beneficial effects of the utility model reside in that: (1) The upper chord excitation device is reasonable in connection design with the needle tube seat and the needle core seat, stable in upper chord excitation operation, capable of limiting the operation sequence of the needle tube key and the needle core key and capable of improving safety. (2) The first hook of the needle tube seat and the second hook of the needle core seat are respectively in contact fit with the first baffle and the second baffle on the inner shell, so that the stress is dispersed when the winding is excited, the balance is better, the triggering accuracy in the using process is enhanced, and the triggering is avoided. (3) The trigger switch comprises a bottom switch and a middle switch, and the trigger operation is more flexible and convenient. (4) The safety lock catch is provided with the operation parts on two sides, both sides of the outer shell can be operated, and the operation is simple and rapid.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the structure of the present invention.

Fig. 3 is a schematic view of the internal cross-sectional structure of the present invention.

FIG. 4 is a schematic view of the upper chord excitation device.

Fig. 5 is a schematic view of the inner housing structure.

FIG. 6 is a schematic view of the needle holder and the core holder.

Fig. 7 is a schematic structural view of the trigger switch device.

Fig. 8 is a schematic view of a safety latch structure.

Fig. 9 is a schematic view of the structure of the needle core and the needle tube.

Fig. 10 is a schematic view of the needle seat structure.

In the figure: 1 outer shell, 11 upper shell, 111 upper chord excitation device mounting hole, 112 middle switch mounting groove, 113 bottom switch mounting groove, 114 upper stop groove, 12 lower shell, 121 anti-slip bulge, 122 bottom switch mounting groove, 123 lower stop groove, 13 needle seat, 131 needle channel, 132, 133 clamp bulge, 2 upper chord excitation device, 21 needle key, 211 connecting groove, 212 limit step, 22 needle core key, 221 connecting groove, 222 limit bulge, 3 safety lock, 31 operating part, 32 lock part, 4 trigger switch device, 41 bottom switch, 411 touch part, 411a touch slant, 412 limit part, 413 press part, 42 middle switch, 43 connecting strip, 5 inner shell, 51 upper inner shell, 511 upper inner shell inner hole, 512 upper soft cushion, 52 lower inner shell, 521 lower inner shell inner hole, 522 lower soft cushion, 53 first baffle, 54 second baffle, 6 movable assembly, 61 needle seat, 611 first connecting bulge, 612 first hook, 613 touch seat, 62 needle core seat, 621 second connecting bulge, 623 second hook, 623, 66 needle tube seat, front needle core spring seat, 64 needle core spring, front needle core seat, rear needle core spring, 64 needle core spring, and sampling needle seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

As shown in fig. 1, fig. 2 and fig. 3, the present invention discloses a disposable full-automatic biopsy needle, which comprises an operating handle device and an inner shell trigger mechanism, wherein the operating handle device comprises an outer shell 1, an upper string excitation device 2, a safety lock catch 3 and a trigger switch device 4, the inner shell trigger mechanism is disposed in the outer shell 1, the upper string excitation device 2 comprises a needle tube key 21 and a needle core key 22, an upper string excitation device 2 mounting hole 111 is disposed on the outer shell 1, the upper string excitation device 2 is mounted in the upper string excitation device mounting hole 111, the inner shell trigger mechanism comprises an inner shell 5 and a movable component 6, the needle tube seat 61, the needle core seat 62, a front spring 63, a rear spring 64, a needle tube 65 and a needle core 66 are disposed on the outer shell 1, the tail of the needle tube 65 is connected with the needle tube seat 61, the tail of the needle core 66 is connected with the needle tube seat 62, the needle tube seat 61 and the needle core seat 62 are assembled in the inner shell 5, the inner shell 5 comprises an upper inner shell 51 and a lower shell 52, a first baffle 53 and a second baffle 54 are disposed on the inner shell 51 and a second baffle 54, a hook 612 and a hook pedestal 54 are symmetrically disposed on the needle seat 622. The bottom of the needle tube seat 61 and the bottom of the needle core seat 62 are provided with inclined planes matched with the upper inner shell 51 and the lower inner shell 52, and the needle tube seat 61 and the needle core seat 62 are matched and move along the upper inner shell 51 and the lower inner shell 52 in the process of upper chord excitation or triggering, so that the needle tube 65 and the needle core are driven to retreat or advance. In this embodiment, the first hooks 612 are symmetrically disposed at the tail of the needle tube seat 61, the second hooks 622 are symmetrically disposed at the tail of the needle core seat 62, and the first hooks 612 and the second hooks 622 are matched with the first baffle 53 and the second baffle 54 in the inner housing 5, so that the force is uniformly distributed when the upper string excitation device 2 is applied to the upper string, and the balance is better, and the triggering accuracy in the using process is enhanced.

In this embodiment, the needle base 61 and the needle core base 62 are respectively provided with a first connecting protrusion 611 and a second connecting protrusion 621 on different sides, the winding-up actuating device 2 includes a needle key 21 and a needle core key 22, the connecting slot 211 on the needle key 21 is connected with the first connecting protrusion 611, and the connecting slot 221 on the needle core key 22 is connected with the second connecting protrusion 621. The needle core key 22 and the needle tube key 21 are rapidly assembled with the needle core seat 62 and the needle tube seat 61 through the structure that the bulges are matched with the grooves, the needle tube key 21 and the needle core key 22 are pressed to respectively push the needle tube seat 61 and the needle core seat 62 to move towards the tail part of the inner shell 5, and the front spring 63 and the rear spring 64 are compressed. Preferably, the needle tube key 21 is provided with a limit step 212, the needle core key 22 is provided with a limit protrusion 222, and the limit step 212 limits the limit protrusion 222, as shown in fig. 4. The limiting step 212 on the hour tube key 21 limits the limiting bulge 222 when the needle core key 22 is pressed, and the needle core key 22 cannot be pressed; therefore, the operation sequence is corrected by pressing the needle tube key 21 and then the needle core key 22, thereby improving the safety. The needle tube key 21 and the needle core key 22 can be numbered sequentially, for example, by adopting the modes of numbers, letters and the like, the needle tube key 21 is firstly pressed and then the needle core key 22 is pressed, so that the operation is convenient, and the time is saved.

In this embodiment, as shown in fig. 5, an upper inner shell inner hole 511 and a lower inner shell inner hole 521 are respectively formed in the upper inner shell 51 and the lower inner shell 52 behind the first baffle 53, and an upper cushion 512 and a lower cushion 522 are respectively mounted on the upper inner shell inner hole 511 and the lower inner shell inner hole 521. The upper cushion 512 and the lower cushion 522 play a role in buffering, so that excessive force after triggering is prevented, and the triggering stability is improved.

In this embodiment, the housing 1 includes an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are assembled by an upper buckle and a lower buckle, a joint line is arranged on the side surface of the handle, and the lower shell 12 is provided with an anti-slip bulge 121. The bonding line is positioned on the side surface of the handle, so that the gloves can be prevented from being scratched during sampling. The front ends of the upper shell 11 and the lower shell 12 are provided with a needle seat 13, the needle seat 13 is respectively connected with the upper shell 11 and the lower shell 12 in a clamping way, and the needle core 66 and the needle tube 65 penetrate out of a needle tube channel 131 on the needle seat 13. The structure of the needle hub 13 is shown in fig. 10, wherein the needle hub 13 is provided with locking protrusions 132 and 133, the corresponding positions of the upper shell 11 and the lower shell 12 are provided with locking grooves, and the locking protrusions 132 and 133 are inserted into the locking grooves to fix the needle hub 13 with the upper shell 11 and the lower shell 12. The needle seat 13 enables the upper shell 11 and the lower shell 12 to be connected more firmly, meanwhile, the front end of the sealed shell 1 is sealed, the needle tube channel 131 accurately positions the needle tube 65, vibration and shake during sampling are prevented, and sampling is more accurate.

In this embodiment, the structure of the core print 62 and the needle holder 61 is as shown in fig. 6, the front end and the rear end of the core print 62 are respectively provided with a core print front touching inclined plane 624 and a core print rear touching inclined plane 623, and the rear end of the needle holder 61 is provided with a needle holder touching inclined plane 613. The structure is more stable and the triggering effect is good by utilizing the contact between the inclined planes for triggering.

In this embodiment, the trigger switch device 4 includes a bottom switch 41 and a middle switch 42, as shown in fig. 7, the bottom switch 41 includes a touch portion 411 and a pressing portion 413, the touch portion 411 is provided with a touch inclined surface 411a matching with the rear touch inclined surface 623 of the plunger seat; a limiting part 412 is arranged between the touch part 411 and the pressing part 413, the limiting part 412 is double-wing shaped, and the limiting part 412 is abutted against the inner wall of the shell 1; the touching portion 411 side of the bottom switch 41 is connected to the connecting bar 43, the connecting bar 43 extends upward to the middle of the upper shell 11 of the housing 1, and the middle switch 42 is fixed to the front of the connecting bar 43 and located in the middle switch mounting groove 112 of the housing 1. The stopper 412 stops the trigger switch device 4 so that it does not move freely when the bottom switch 41 or the middle switch 42 is not touched, and when a force is applied to the pressing portion 413 of the bottom switch 41 or the middle switch 42, the stopper 411 moves forward and acts on the core holder 62 to trigger the movement against the resistance of the stopper 412. The middle switch 42 is arranged at the middle upper part of the upper shell 11, when the operating handle is held by hand, the thumb just touches the middle switch 42, the bottom switch 41 or the middle switch 42 can be selected according to the operation requirement to be triggered, and the operation is more flexible and convenient.

In order to prevent the false touch of the operation switch, in the present embodiment, bottom switch mounting grooves 113 and 122 are formed at the tail portions of the upper shell 11 and the lower shell 12, and the outer end surfaces of the pressing portions 413 of the bottom switch 41 are located in the bottom switch mounting grooves 113 and 122, so that the bottom switch 41 is recessed to prevent the false touch of the bottom switch 41.

In this embodiment, as shown in fig. 8, the safety catch 3 includes a locking portion 32 and operation portions 31 symmetrically disposed at two sides of the locking portion 32, the upper casing 11 and the lower casing 12 of the housing 1 are respectively provided with an upper stop groove 114 and a lower stop groove 123, and the operation portions 31 fall into the upper stop groove 114 or the lower stop groove 123; the locking portion 32 of the safety catch 3 is located between the touching portion 411 of the bottom switch 41 and the upper inner case 51. The safety lock catch 3 can be operated on both sides of the shell, and after the upper chord excitation device 2 is triggered, the safety lock catch 3 can be pushed into the lower stopping groove 123 of the lower shell 12, so that the switch is prevented from being touched by mistake, sampling can be realized after the safety lock catch is pushed by one hand in the sampling process, and the operation is simple and rapid.

In order to conveniently determine the entering depth of the biopsy needle, the front part of the needle tube 65 is provided with an embossing 651 for indicating the length, and the embossing 651 can be used for realizing accurate positioning under ultrasonic guidance, so that the accuracy of a sampling position is ensured, and the operation time is saved.

The utility model discloses a full-automatic biopsy needle of disposable use can be dismantled and assembled, its equipment operation is relatively simple, during the equipment, is connected upper cushion 512 and upper inner shell hole 511, and lower cushion 522 and lower inner shell hole 521 are connected, connects syringe seat 61 and needle 65 afterbody, and front spring 63 and syringe seat 61 afterbody are connected, and the stylet seat 62 is connected with the stylet 66, and back spring 64 and 62 afterbody connections of stylet seat constitute movable assembly 6; the assembled components are assembled between the upper inner shell 51 and the lower inner shell 52 together to form an inner shell trigger mechanism, the connecting grooves 211 and 221 on the needle tube key 21 are connected with the first connecting bulges 611 on the needle tube seat 61, the connecting grooves 211 and 221 on the needle core key 22 are connected with the second connecting bulges 621 on the needle core seat 62, the assembled components and the bottom switch 41 are assembled in the upper shell 11, the middle switch 42 is assembled in the middle switch mounting groove 112 on the upper shell 11 and is connected with the connecting strips 43 on the bottom switch 41, the safety lock catch 3 is assembled between the bottom switch 41 and the upper inner shell 51, the lower shell 12 is assembled in the clamping groove structure of the upper shell 11 to form an operating handle device, the needle port seat 13 is assembled at the head of the operating handle device and is connected with the upper shell 11 and the lower shell 12, and the assembly of the disposable full-automatic biopsy needle is completed.

When in use, the needle tube key 21 and the stylet key 22 are pressed in sequence, the front spring 63 and the rear spring 64 are compressed, so that the first hook 612 of the needle tube seat 61 and the second hook 622 of the stylet seat 62 are contacted with the first baffle 53 and the second baffle 54 formed by buckling the upper inner shell 51 and the lower inner shell 52 to complete the upper chord excitation process, the safety lock catch 3 is pushed to be contacted with the lower stopping groove 123 at the bottom of the lower shell 12, and the upper chord excitation operation is completed; the strung assembly punctures the skin to the position to be sampled under the guidance of the ultrasonic probe, pushes the safety lock catch 3 in the upper stop slot 114 of the upper shell 11 in the opposite direction, pushes or presses the bottom switch 41 forward by the middle switch 42, so that the contact inclined plane 411a on the bottom switch 41 presses the contact inclined plane 623 after the needle core seat, and the needle core seat is plastically deformed, so that under the pushing of the rear spring 64, the needle core seat 62 slides forward and hits the upper cushion 512 and the lower cushion 522, the upper cushion 512 and the lower cushion 522 are deformed by the pressing, the needle core seat front contact inclined plane 624 presses the needle core seat contact inclined plane 613 to be plastically deformed, the lower needle seat 61 is pushed by the action of the front spring 63 to slide forward to be stopped in contact with the baffle 661 formed by buckling the upper inner shell 51 and the lower inner shell 52, the tissue cutting process is completed, and the samples enter the sampling groove 661 of the needle core 66.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. Full-automatic biopsy needle of disposable, including operating handle device and inner shell trigger mechanism, its characterized in that: the operating handle device comprises an outer shell, an upper string excitation device, a safety lock catch and a trigger switch device, wherein an inner shell trigger mechanism is arranged in the outer shell, the upper string excitation device comprises a needle tube key and a needle core key, the inner shell trigger mechanism comprises an inner shell and a movable assembly, a needle tube seat, a needle core seat, a front spring, a rear spring, a needle tube and a needle core are arranged in the movable assembly, the tail part of the needle tube is connected with the needle tube seat, the tail part of the needle core is connected with the needle core seat, the needle tube seat and the needle core seat are assembled in the inner shell, the inner shell comprises an upper inner shell and a lower inner shell, a first baffle and a second baffle are arranged in the upper inner shell and the lower inner shell, the front spring and the rear spring are respectively sleeved on the needle tube seat and the needle core seat, first hooks are symmetrically arranged on two sides of the tail part of the needle tube seat, second hooks are symmetrically arranged on the tail part of the needle core seat, and the first hooks and the second hooks are respectively contacted with the first baffle and the second baffle; the side surfaces of the needle tube seat and the needle core seat are respectively provided with a first connecting bulge and a second connecting bulge, the winding excitation device comprises a needle tube key and a needle core key, a connecting groove on the needle tube key is connected with the first connecting bulge, and a connecting groove on the needle core key is connected with the second connecting bulge.

2. The fully automated single use biopsy needle of claim 1, wherein: the needle tube key is provided with a limiting step, the needle core key is provided with a limiting bulge, and the limiting step limits the limiting bulge.

3. The fully automated single use biopsy needle of claim 1, wherein: an inner shell inner hole and an inner shell inner hole are formed in the upper inner shell and the lower inner shell behind the first baffle respectively, and an upper cushion and a lower cushion are mounted in the upper inner shell inner hole and the lower inner shell inner hole respectively.

4. The fully automated single use biopsy needle of claim 1, wherein: the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are assembled by upper and lower buckles, a combination line is arranged on the side face of the handle, and the lower shell is provided with an anti-skid bulge.

5. The fully automated single use biopsy needle of any one of claims 1-4, wherein: the front end and the rear end of the needle core seat are respectively provided with a front needle core seat touch inclined plane and a rear needle core seat touch inclined plane, and the rear end of the needle tube seat is provided with a needle tube seat touch inclined plane.

6. The fully automated single use biopsy needle of claim 5, wherein: the trigger switch device comprises a bottom switch and a middle switch, the bottom switch comprises a touch part and a pressing part, and the touch part is provided with a touch inclined plane matched with the rear touch inclined plane of the needle core seat; a limiting part is arranged between the touch part and the pressing part, the limiting part is in a double-wing shape, and the limiting part is abutted against the inner wall of the shell; one side of a touch part of the bottom switch is connected with the connecting strip, the connecting strip upwards extends to the middle of the shell, and the middle switch is fixed in the front of the connecting strip and is positioned in a switch mounting groove of the shell.

7. The fully automated single use biopsy needle of claim 6, wherein: the afterbody of epitheca and inferior valve is equipped with bottom switch mounting groove, and bottom switch presses the splenium outer terminal surface to be located bottom switch mounting groove.

8. The fully automated single use biopsy needle of claim 6, wherein: the safety lock catch comprises a locking part and operating parts symmetrically arranged on two sides of the locking part, an upper shell and a lower shell of the shell are respectively provided with an upper stopping groove and a lower stopping groove, and the operating parts fall into the upper stopping grooves or the lower stopping grooves; the locking part of the safety lock catch is positioned between the touch part of the bottom switch and the upper inner shell.

9. The fully automated single use biopsy needle according to any one of claims 1-4, wherein: the front ends of the upper shell and the lower shell are provided with needle opening seats which are respectively connected with the upper shell and the lower shell in a clamping way, and the needle core and the needle tube penetrate out from a needle tube channel on the needle opening seats.

10. The fully automated single use biopsy needle according to any one of claims 1-4, wherein: the front part of the needle tube is provided with an embossing used for indicating the length; the needle tube key and the needle core key are numbered in sequence.

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