CN114176734A

CN114176734A - Interventional department puncture device with adjustable puncture depth

Info

Publication number: CN114176734A
Application number: CN202210020059.1A
Authority: CN
Inventors: 孟令武
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-03-15
Anticipated expiration: 2042-01-06
Also published as: CN114176734B

Abstract

The invention relates to a medical instrument, in particular to an interventional puncture device with an adjustable puncture depth, comprising a cylindrical shell with two ends penetrating through, and a top cover and a bottom cover are detachably provided at both ends of the shell; One end of the opening towards the top cover has a larger diameter, and the other end has a smaller opening diameter; a needle cylinder that can move along the axial direction of the casing is coaxially arranged inside the casing, and the side of the needle cylinder facing the bottom cover is coaxially fixed with a puncture The puncture needle is communicated with the inside of the needle barrel; an elastic needle ejection mechanism is arranged between the syringe barrel and the top cover, and a switch assembly is also arranged between the elastic needle ejection mechanism and the housing. Through the cooperation of the switch assembly and the elastic needle ejection mechanism, the puncture needle can be quickly inserted into the human body after the bottom cover is removed, leaving a very short reaction time for the patient, thereby eliminating the pain during the puncture process, including Psychological and physical pain, the set adjustment component can adjust the depth of a single puncture.

Description

Interventional department puncture device with adjustable puncture depth

Technical Field

The invention relates to a medical instrument, in particular to a puncture device with adjustable puncture depth for an interventional department.

Background

The interventional puncture is a new technology for further clinical diagnosis and treatment under the guidance of an ultrasonic probe under the guidance of imaging, can complete various puncture biopsies by the guidance of the ultrasonic interventional puncture, can perform operations such as suction and intubation and medicine injection on some focuses, and can play a good complementary role in the range which is not easy to reach or is an operation forbidden area in a surgical operation.

Currently, needle biopsies typically take anywhere from 30 minutes to 1 hour. And (5) whether the operation is smooth, whether the packet block is limited and whether the puncture is successful are seen. The specific steps are as follows, step 1, local anesthesia is carried out after color Doppler ultrasound positioning. And step 2, puncturing the puncture needle to the vicinity of the package under the guidance of the B ultrasonic. And 3, triggering the puncture needle and taking out part of the tissue. And 4, pulling out the puncture needle, and placing the tissue in the fixing liquid for fixing. This completes 1 puncture test. Generally, 3 points are punctured, and after enough specimens are collected, pathological examination is performed.

Most of the existing puncture devices do not have the function of depth adjustment, and when puncturing is carried out, a puncture needle is punctured into a human body manually by a doctor, so that on one hand, the accuracy is limited, on the other hand, the puncturing speed is low, and bad emotion is easily brought to a patient.

Disclosure of Invention

The invention aims to provide an interventional department puncture device with adjustable puncture depth, so as to solve the XXX problem in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an interventional department puncture device with adjustable puncture depth comprises a cylindrical shell with two through ends, wherein a top cover and a bottom cover are detachably arranged at the two ends of the shell respectively; the diameter of an opening of the shell towards one end of the top cover is larger, and the diameter of an opening of the other end of the shell towards the top cover is smaller;

a needle cylinder capable of moving along the axial direction of the shell is coaxially arranged in the shell, a puncture needle is coaxially fixed on one side of the needle cylinder facing the bottom cover, and the puncture needle is communicated with the inside of the needle cylinder;

an elastic needle discharging mechanism is arranged between the needle cylinder and the top cover, a switch component is also arranged between the elastic needle discharging mechanism and the shell, and after the switch component is started, the elastic needle discharging mechanism pushes the needle cylinder and the puncture needle to move along the axis of the shell;

and an adjusting component is also arranged between the shell and the needle cylinder and is used for adjusting the stroke of the needle cylinder and the puncture needle moving along the axis of the shell.

The invention further defines the scheme as follows: the elastic needle discharging mechanism comprises a push cylinder with one end sealed and attached to the end part of the needle cylinder; the push cylinder is sleeved with a sleeve rod fixed in the top cover in a sliding mode, a pressure spring is sleeved on the sleeve rod, one end of the pressure spring is attached to the inner wall of the top cover, and the other end of the pressure spring is attached to one end, close to the top cover, of the push cylinder;

two guide rods are respectively fixed at two sides of the center of the push cylinder, and guide holes matched with the guide rods in a sliding manner are arranged on the sleeve rods.

The invention also provides a scheme as follows: the switch assembly comprises a supporting rod fixed on the inner wall of the shell, an extrusion sheet in sliding fit with the supporting rod, an elastic sheet elastically connecting the inner wall of the shell and the extrusion sheet, a rotating shaft fixed in the shell and a swing arm rotatably arranged on the rotating shaft;

the button with the extrusion piece laminating, the one end of swing arm rotate be provided with the gyro wheel of extrusion piece roll laminating, the other end has wedge portion seted up on the outer wall of push-off drum with the wedge groove of wedge portion adaptation.

The invention also provides a scheme as follows: the top cover and the shell are detachably connected through a clamping structure; the clamping structure comprises an inverted L-shaped clamping groove arranged on the top cover, and a bulge matched with the inverted L-shaped clamping groove is arranged on the outer wall of one side, close to the top cover, of the shell; the clamping structures are multiple groups and are distributed between the shell and the top cover along the circumference.

The invention also provides a scheme as follows: the outer wall of the needle cylinder is integrally provided with a stop strip, and the inner wall of the shell is provided with a sliding groove matched with the stop strip.

The invention also provides a scheme as follows: the adjusting assembly comprises an adjusting ring arranged on the periphery of the shell, an internal thread is arranged on the inner wall of the adjusting ring, and an external thread matched with the internal thread on the inner wall of the adjusting ring is arranged on one section of outer wall of the shell;

and the outer wall of the shell is provided with a through groove which is arranged along the length direction of the shell, the inner wall of the adjusting ring is also provided with a circle of annular grooves, and the annular grooves are provided with baffle arms which penetrate through the through grooves in a sliding manner.

The invention also provides a scheme as follows: the inner wall of the bottom cover is also provided with internal threads, and the outer wall of the shell close to the opening with the smaller diameter is provided with external threads matched with the internal threads on the inner wall of the bottom cover;

and an inner pad for plugging an opening with a smaller diameter of the shell is arranged in the center of the inner wall of the bottom cover.

The invention also provides a scheme as follows: the outside cover of shell is equipped with the sheath, the one end of sheath is uncovered, is provided with the concave circle of round on the open one end inner wall, be provided with on the outer wall of shell the round with the protruding circle of concave circle adaptation, and open one section go up to be provided with a plurality of fretwork grooves along the circumference equidistance.

Compared with the prior art, the invention has the beneficial effects that: through the switch module and the cooperation of elasticity play needle mechanism that set up, can be with the bottom demolish the back, can be quick prick the puncture needle into human body in, the time of leaving for the patient reaction is extremely short to eliminate the misery of puncture in-process, including the misery in psychology and physiology, the adjusting part of setting can be adjusted the degree of depth of single puncture, adapts to the depth of different focuses, and the practicality is strong, suitable comprehensive popularization.

Drawings

Fig. 1 is a schematic structural diagram of an interventional department puncture device with adjustable puncture depth.

Fig. 2 is a partial exploded view of an interventional procedure puncture device with adjustable puncture depth.

Fig. 3 is a schematic structural diagram of a top cover and an inverted L-shaped clamping groove in the interventional department puncture device with adjustable puncture depth.

Fig. 4 is a top view of an adjustable penetration depth interventional procedure device.

Fig. 5 is a sectional view taken along the line a-a in fig. 4.

Fig. 6 is a sectional view taken along line B-B in fig. 4.

Fig. 7 is an enlarged view at F in fig. 6.

Fig. 8 is an enlarged view at D in fig. 5.

Fig. 9 is an enlarged view at E in fig. 5.

Fig. 10 is an enlarged view at C in fig. 6.

Fig. 11 is a structural schematic view of the interventional department puncture device with the puncture depth adjustable after the sliding sleeve is removed.

Fig. 12 is a partial section of the adjusting ring and the structure of the blocking arm and the annular groove.

In the figure: 1-a sheath; 2-a housing; 3-a top cover; 4-bulge; 5-an inverted L-shaped slot; 6-push button; 7-hollow out grooves; 8-concave ring; 9-convex ring; 10-bottom cover; 11-an adjusting ring; 12-a catch arm; 13-syringe; 14-puncture needle; 15-a push cylinder; 16-a loop bar; 17-a guide rod; 18-a pressure spring; 19-a stop bar; 20-a chute; 21-rubber plugging piece; 22-a support rod; 23-extruding a sheet; 24-a spring plate; 25-a roller; 26-a swing arm; 27-a rotating shaft; 28-inner pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 12, as an embodiment of the present invention, the interventional procedure puncturing device with adjustable puncturing depth includes a cylindrical housing 2 with two through ends, wherein a top cover 3 and a bottom cover 10 are detachably disposed at two ends of the housing 2;

wherein, the opening diameter of the shell 2 towards one end of the top cover 3 is larger, and the opening diameter of the other end is smaller.

A needle cylinder 13 which can move along the axial direction of the shell 2 is coaxially arranged in the shell 2, a puncture needle 14 is coaxially fixed on one side of the needle cylinder 13 facing the bottom cover 10, and the puncture needle 14 is communicated with the inside of the needle cylinder 13.

When the puncture operation is needed, the bottom cover 10 is removed, and the needle cylinder 13 drives the puncture needle 14 to move in the shell 2 and is close to one end of the shell 2 with smaller opening diameter; after the needle 14 passes through the smaller diameter opening, it contacts the body of the patient and penetrates into the lesion.

Here, a plurality of taking ports are equidistantly arranged on the outer wall of the puncture needle 14 along the circumference, the taking ports are conical, and the conical ports are inclined to one side of the top cover 3, so that a barbed cross section is formed;

the tissue in the patient is not removed by the access during the insertion of the puncture needle 14 into the body, but when the puncture needle 14 is pulled out of the body of the patient, a part of the living tissue is removed from the body of the patient by the access of the section of the barb, so that pathological studies can be performed.

An elastic needle discharging mechanism is arranged between the needle cylinder 13 and the top cover 3, a switch component is also arranged between the elastic needle discharging mechanism and the shell 2, and after the switch component is started, the elastic needle discharging mechanism pushes the needle cylinder 13 and the puncture needle 14 to move along the axis of the shell 2 until the puncture needle 14 crosses one end of the opening with smaller diameter and punctures into a focus.

An adjusting component is further arranged between the shell 2 and the needle cylinder 13 and is used for adjusting the stroke of the needle cylinder 13 and the puncture needle 14 moving along the axis of the shell 2.

In this embodiment, the switch assembly is engaged with the elastic needle discharging mechanism, so that the puncture needle 14 can be quickly inserted into the patient after the bottom cover 10 is removed, thereby shortening the puncture time and reducing the pain of the patient.

In the prior art, when puncturing, a puncture needle is punctured into a human body manually, the puncturing process is slow, and extremely strong discomfort is brought to a patient in physiology and cardiac force; the elastic needle outlet mechanism arranged in the invention is matched with the switch component, so that the puncture needle 14 can be quickly inserted into a human body, and the reaction time of a patient is extremely short, thereby eliminating the pain in the puncture process, including the psychological pain and the physiological pain.

As another embodiment of the present invention, the elastic needle-out mechanism includes a push tube 15 with one end sealed and attached to the end of the needle cylinder 13;

in detail, one end of the push cylinder 15, which is sealed, is attached to one end of the needle cylinder 13, which is far away from the puncture needle 14, and a rugged excretory opening is arranged in the center of one end of the needle cylinder 13, which is attached to the push cylinder 15, and a soft rubber plugging piece 21 is inserted in the excretory opening;

wherein, the periphery of the rubber plugging piece 21 is also in a convex-concave shape, and one end of the rubber plugging piece 21 is flush with one end of the needle cylinder 13 attached to the push cylinder 15.

When the puncture device is used for biopsy puncture, the puncture needle 14 and a taking port on the puncture needle can be used for taking away human pathological tissues, the cyst is punctured and sampled, and after the puncture needle 14 is punctured into the cyst, tissue fluid in the cyst can enter the needle cylinder 13 through the taking port; after the puncture device is removed from the body, the tissue fluid in the cylinder 15 can be removed from the excretion hole by opening the rubber stopper 21.

Since the inner wall of the drain port is rugged, the drain port can be sealed by using the soft rubber sealing member 21 having rugged outer periphery.

The push cylinder 15 is in sliding fit with a sleeve rod 16 fixed in the top cover 3, a pressure spring 18 is sleeved on the sleeve rod 16, one end of the pressure spring 18 is attached to the inner wall of the top cover 3, and the other end of the pressure spring is attached to one end, close to the top cover 3, of the push cylinder 15.

In order to prevent the push cylinder 15 from rotating relative to the sleeve rod 16 and causing the switch assembly to be misplaced, a guide rod 17 is respectively fixed at two sides of the center of the push cylinder 15, and a guide hole matched with the guide rod 17 in a sliding mode is arranged on the sleeve rod 16.

When the switch component is started, the push cylinder 15 is automatically pushed to slide along the sleeve rod 16 under the action of the elastic force of the pressure spring 18, the needle cylinder 13 and the puncture needle 14 are pushed to the bottom cover 10, and the puncture needle 14 penetrates through the opening with the smaller diameter and enters the human body.

As another embodiment of the present invention, a gap is formed in the housing 2, a button 6 capable of being pressed is disposed at the gap, the switch assembly includes a supporting rod 22 fixed on an inner wall of the housing 2, a pressing sheet 23 in sliding fit with the supporting rod 22, an elastic sheet 24 elastically connecting the inner wall of the housing 2 and the pressing sheet 23, a rotating shaft 27 fixed in the housing 2, and a swing arm 26 rotatably disposed on the rotating shaft 27;

the button 6 with the extrusion piece 23 laminating, the one end of swing arm 26 is rotated and is provided with the gyro wheel 25 of extrusion piece 23 roll laminating, and the other end has wedge portion seted up on the outer wall of push-out jack 15 with the wedge groove of wedge portion adaptation.

In this embodiment, pressing the button 6 drives the squeezing sheet 23 to approach the pushing cylinder 15 under the guiding action of the supporting rod 22, and the elastic sheet 24 is elastically deformed, so as to drive the end of the swing arm 26, which is provided with the roller 25, to approach the pushing cylinder 15, and to rotate the swing arm 26 around the rotating shaft 27 by a certain angle; in the process, the other end of the swing arm 26 is separated from the wedge-shaped groove, so that the push cylinder 15 is unlocked, and the unlocked push cylinder 15 slides along the loop bar 16 under the action of the pressure spring 18 to drive the needle cylinder 13 and the puncture needle 14 to move along the axis of the shell 2.

As another embodiment of the present invention, the top cover 3 is detachably connected to the housing 2 through a snap structure; the clamping structure comprises an inverted L-shaped clamping groove 5 arranged on the top cover 3, and a bulge 4 matched with the inverted L-shaped clamping groove 5 is arranged on the outer wall of one side, close to the top cover 3, of the shell 2; the clamping structures are multiple groups and are distributed between the shell 2 and the top cover 3 along the circumference.

In the embodiment, the top cover 3 can be kept to be stably arranged on one end of the shell 2 all the time by matching the arranged inverted L-shaped clamping groove 5 with the protrusion 4 and skillfully utilizing the elasticity of the pressure spring 18;

when the top cover 3 is pressed to approach the shell 2, the pressure spring 18 is further compressed, after the upper edge of the inverted L-shaped clamping groove 5 on the top cover 3 is attached to the protrusion 4, the top cover 3 can be taken out from the end part of the shell 2 after rotating for a certain angle, and at the moment, the loop bar 16 and the push cylinder 15 can be taken out from the shell 2 together, so that the puncture needle 14 and the needle cylinder 13 in the shell 2 can be taken out from the shell 2.

As still another embodiment of the present invention, in order to keep the cylinder 13 and the puncture needle 14 rotated in the housing 2, the puncture needle 14 is rotated into the human body to give a sense of discomfort to the patient; a stop strip 19 is integrally arranged on the outer wall of the needle cylinder 13, and a sliding groove 20 matched with the stop strip 19 is arranged on the inner wall of the shell 2.

The cooperation of the stop strip 19 and the slide groove 20 makes the needle cylinder 13 only slide along the axis of the housing 2 in the housing 2, and can not rotate.

As another embodiment of the present invention, the adjusting assembly includes an adjusting ring 11 disposed on the outer periphery of the housing 2, an inner thread is disposed on the inner wall of the adjusting ring 11, and an outer thread adapted to the inner thread on the inner wall of the adjusting ring 11 is disposed on a section of outer wall of the housing 2;

and the outer wall of the shell 2 is provided with a through groove which is arranged along the length direction of the shell 2, the inner wall of the adjusting ring 11 is also provided with a circle of annular grooves, and the annular grooves are provided with baffle arms 12 which penetrate through the through grooves in a sliding manner.

Specifically, the stopper arm 12 has a slider at one end thereof, and the slider is slidably fitted in the annular groove.

In the embodiment, the adjusting ring 11 is rotated to drive the baffle arm 12 to slide along the length direction of the through groove along the shell 2 under the action of the internal thread and the external thread, and the position of the baffle arm 12 is adjusted;

when the elastic needle-out mechanism releases the elastic force of the pressure spring 18, the needle cylinder 13 approaches to the blocking arm 12, and when one end of the needle cylinder 13, which is provided with the puncture needle 14, moves to be attached to the blocking arm 12, the blocking arm 12 blocks the needle cylinder 13 to stop the movement of the needle cylinder 13 and the puncture needle 14;

adjusting the position of the arm 12 adjusts the end of travel of the needle 14 and barrel 13, thereby adjusting the depth of penetration.

As another embodiment of the present invention, the inner wall of the bottom cover 10 is also provided with an internal thread, and an external thread adapted to the internal thread on the inner wall of the bottom cover 10 is provided on the outer wall of the housing 2 near the opening with smaller diameter;

an inner pad 28 for sealing the opening of the housing 2 having a smaller diameter is provided at the center of the inner wall of the bottom cap 10.

In this embodiment, the bottom cap 10 is detachably connected to the housing 2 by the matching of the internal thread on the inner wall of the bottom cap 10 and the external thread on the outer wall of the housing 2, and when the two are connected, the opening with smaller diameter is blocked by the inner pad 28 to prevent the outside air from entering the housing 2 and polluting the puncture needle 14.

As another embodiment of the present invention, a sheath 1 is sleeved outside the housing 2, one end of the sheath 1 is open, a circle of concave ring 8 is arranged on the inner wall of the open end, a circle of convex ring 9 adapted to the concave ring 8 is arranged on the outer wall of the housing 2, and a plurality of hollowed-out grooves 7 are equidistantly arranged along the circumference on the open section.

In the embodiment, when the puncture device is not used, the through groove on the shell 2 is blocked by the sheath 1 to isolate the outside air, and the sheath 1 is stably connected with the shell 2 when being sleeved by the concave ring 8 and the convex ring 9; when the sheath 1 needs to be removed, the sheath 1 is pulled forcefully, so that the end of the sheath 1 with the concave ring 8 is expanded, and is separated from the convex ring 9.

The purpose of the provision of the hollowed-out groove 7 is to reserve an outwardly expanding gap for the end of the sheath 1 having the recessed ring 8.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An interventional puncture device with adjustable puncture depth, characterized in that it comprises a cylindrical shell (2) with two ends running through, and a top cover (2) is detachably provided at both ends of the shell (2). 3) and the bottom cover (10); one end of the casing (2) facing the top cover (3) has a larger opening diameter, and the other end has a smaller opening diameter;

A needle cylinder (13) that can move along the axial direction of the casing (2) is coaxially arranged inside the casing (2), and the side of the needle cylinder (13) facing the bottom cover (10) is coaxially fixed with a a puncture needle (14), the puncture needle (14) communicates with the interior of the needle cylinder (13);

An elastic needle ejection mechanism is arranged between the needle cylinder (13) and the top cover (3), and a switch assembly is also arranged between the elastic needle ejection mechanism and the housing (2). , the elastic needle ejection mechanism pushes the needle cylinder (13) and the puncture needle (14) to move along the axis of the housing (2);

An adjustment assembly is further provided between the casing (2) and the needle cylinder (13), and the adjustment assembly is used to adjust the movement of the needle cylinder (13) and the puncture needle (14) along the axis of the casing (2). Itinerary adjustment.

2. An interventional puncture device with adjustable puncture depth according to claim 1, characterized in that the elastic needle ejection mechanism comprises a pusher with one end sealed and fitted with the end of the needle cylinder (13). a cylinder (15); the push cylinder (15) is slidably sleeved with a sleeve rod (16) fixed in the top cover (3), and a compression spring (18) is sleeved on the sleeve rod (16). One end of the compression spring (18) is fitted with the inner wall of the top cover (3), and the other end is fitted with the end of the push cylinder (15) close to the top cover (3);

A guide rod (17) is fixed on both sides of the center of the push cylinder (15), and a guide hole is provided on the sleeve rod (16) for sliding fit with the guide rod (17).

3. The interventional puncture device with an adjustable puncture depth according to claim 2, characterized in that a notch is provided on the casing (2), and a push button (6) is provided at the notch. ), the switch assembly comprises a support rod (22) fixed on the inner wall of the housing (2), a pressing piece (23) slidingly matched with the support rod (22), and elastically connected to the housing (2) The inner wall and the elastic piece (24) of the extruding sheet (23), the rotating shaft (27) fixed in the casing (2), and the swing arm (26) rotatably arranged on the rotating shaft (27);

The button (6) is fitted with the pressing sheet (23), one end of the swing arm (26) is rotatably provided with a roller (25) that rolls and fits with the pressing sheet (23), and the other end A wedge-shaped portion is provided, and a wedge-shaped groove adapted to the wedge-shaped portion is opened on the outer wall of the push cylinder (15).

4. An interventional puncture device with adjustable puncture depth according to claim 2, characterized in that, the top cover (3) and the housing (2) are detachably connected through a snap-fit structure; The engaging structure includes an inverted L-shaped snap groove (5) provided on the top cover (3), and an outer wall of one side of the casing (2) close to the top cover (3) is provided with an inverted L-shaped snap groove (5). A protrusion (4) adapted to the card slot (5); the engaging structure is in multiple groups and distributed between the casing (2) and the top cover (3) along the circumference.

5. An interventional puncture device with adjustable puncture depth according to claim 2, characterized in that, a stopper strip (19) is integrally provided on the outer wall of the needle barrel (13), and a stopper strip (19) is integrally provided on the outer wall of the casing (13). The inner wall of (2) is provided with a chute (20) adapted to the stop bar (19).

6. An interventional puncture device with adjustable puncture depth according to claim 2, characterized in that, the adjustment component comprises an adjustment ring (11) arranged on the outer circumference of the housing (2), the adjustment The inner wall of the ring (11) is provided with an inner thread, and a section of the outer wall of the housing (2) is provided with an outer thread that matches the inner thread on the inner wall of the adjusting ring (11);

And the outer wall of the outer casing (2) is provided with a through groove, the through groove is arranged along the length direction of the outer casing (2), and an annular groove is also arranged on the inner wall of the adjustment ring (11), The annular groove is slidably provided with a blocking arm (12) passing through the groove.

7 . The interventional puncture device with adjustable puncture depth according to claim 1 , wherein the inner wall of the bottom cover ( 10 ) is provided with an internal thread, and the diameter near the outer casing ( 2 ) is smaller. 8 . The outer wall on one side of the opening is provided with an outer thread that matches the inner thread on the inner wall of the bottom cover (10);

In the center of the inner wall of the bottom cover (10), an inner gasket (28) for sealing the opening with a smaller diameter of the casing (2) is arranged.

8 . The interventional puncture device with adjustable puncture depth according to claim 1 , wherein a sheath ( 1 ) is provided on the outer side of the outer casing ( 2 ). One end is open, the inner wall of the open end is provided with a concave ring (8), the outer wall of the housing (2) is provided with a convex ring (9) adapted to the concave ring (8), and the open A plurality of hollow grooves (7) are arranged at equal distances along the circumference on the upper part of the section.