A disposable laparoscopic trocar and method

Abstract

This invention provides a disposable laparoscopic trocar and method, relating to the field of laparoscopic trocars. The invention includes an outer tube, the upper end of which is fixedly connected to a housing. A trocar is mounted on the upper surface of the housing. A fixing ring is arranged around the outer tube, and a fixing device is provided on the inner wall of the fixing ring. A limiting device is provided on the inner surface of the fixing ring. The fixing ring, by fixing the outer tube around the puncture site, reduces the pressure of the inflated pleural cavity on the skin around the puncture site, reducing the possibility of wound tearing at the puncture site. The fixing ring, fixing device, and limiting device provide a certain degree of fixation to the outer tube, reducing secondary wound damage caused by repeated adjustments to the outer tube's tilt. The adjusting device allows for adjustment of the insertion depth of the outer tube into the abdominal cavity and facilitates fixation, improving operational efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laparoscopic puncture device, in particular to a disposable laparoscopic puncture device and method. BACKGROUND

[0002] The puncture device (also known as puncture needle or puncture trocar) used in laparoscopic surgery is a device for penetrating the abdominal wall and providing an access channel for laparoscopes or other surgical tools. The main function of the puncture device is to create a channel through the abdominal wall, allowing laparoscopes, surgical instruments or other equipment to safely enter the abdominal cavity for operation. Before the start of laparoscopic surgery, the puncture device is often used to insert a gas conduit to inject carbon dioxide gas into the abdominal cavity. The function of the gas is to raise the abdominal wall and expand the abdominal cavity space to provide sufficient operating space and vision for the operation. The design of the puncture device is usually very precise to avoid damaging the organs or blood vessels in the abdominal cavity.

[0003] The existing puncture device structure uses the lower needle part to puncture the abdominal cavity. After the puncture is completed, the external sleeve is left in the abdominal cavity to facilitate the passage of other instruments through the sleeve into the abdominal cavity for operation. At the same time, gas is introduced into the abdominal cavity through the external sleeve to facilitate operation. When inflating, the doctor needs to accurately monitor the gas pressure to avoid injury caused by excessive pressure in the abdominal cavity. This monitoring is relatively energy-consuming. At the same time, when the sleeve is inserted into the abdominal cavity, the doctor needs to hold and control the direction of the sleeve at all times. When the doctor takes the instrument, the sleeve may move to other directions. The doctor needs to re-center later, which may cause the wound to expand. When the sleeve is not held, the sleeve may fall. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a disposable laparoscopic puncture device and method, which solves the problem of the need for the doctor to manually control the direction of the sleeve at all times.

[0006] (II) Technical solutions

[0007] To achieve the above purpose, the present application is implemented by the following technical solutions: a disposable laparoscopic puncture device and method, comprising an external sleeve, the upper end of the external sleeve is fixedly connected with a shell, the upper surface of the shell is installed with a puncture device, the periphery of the external sleeve is provided with a fixing ring, the inner side wall of the fixing ring is provided with a fixing device, the inner surface of the fixing ring is provided with a limiting device, the outer side wall of the external sleeve and below the shell is provided with an adjusting device, the outer side wall of the shell is fixedly connected with a gas pipe, the internal passage of the gas pipe is communicated with the inner side of the shell, the inner side wall of the shell and close to the upper end of the shell is fixedly connected with a sealing rubber, the lower surface of the fixing ring is installed with an adhesive.

[0008] Preferably, the limiting device comprises a movable ring, a moving switch, a moving block, an extension rod, a roller, an inclined surface and a limiting groove, the movable ring is rotationally connected to the inner side surface of the fixed ring, the moving switch is fixedly connected to the upper surface of the movable ring, the moving block is uniformly provided with four groups and is slidingly connected to the inner side surface of the fixed ring, the extension rod is uniformly provided with four groups and is fixedly connected to the inner side surface of the movable ring, the roller is fixedly connected to the inner side surface of the protruding end of the extension rod, the inclined surface is arranged in the direction of the side of the moving block close to the outer sleeve, the inclined surface corresponds to the roller, and the limiting groove is arranged in the direction of the side of the moving block close to the outer sleeve and is located at one end of the inclined surface.

[0009] Preferably, the fixing device comprises a fixed column, a fixed rod, a guide block, a guide rod, a sliding sleeve, a spring, a limiting clamp block and a ball, one end of the fixed column is fixedly connected to the inner side wall of the fixed ring, the other end of the fixed column is sleeved to the inner side surface of the sliding sleeve, the spring is installed on the inner side surface of the sliding sleeve, one end of the spring is fixedly connected to the outer side wall surface of the limiting clamp block, and the other end of the spring is fixedly connected to the end surface of the fixed column close to the limiting clamp block.

[0010] Preferably, the sliding sleeve is fixedly connected to the side surface of the limiting clamp block located at the middle position of the outer side wall, the fixed rod is provided with two groups and is symmetrically arranged between the moving block and the limiting clamp block, one end of the fixed rod is fixedly connected to the side surface of the moving block close to the outer sleeve, the other end of the fixed rod is fixedly connected to the outer side wall surface of the limiting clamp block, the guide block is fixedly connected to the inner side surface of the fixed column, one end of the guide rod is fixedly connected to the surface of the sliding sleeve located at one side of the movable ring, the other end of the guide rod is slidingly connected to the inner side surface of the guide block, and the ball is rotationally connected to the inner side surface of the inner wall of the limiting clamp block.

[0011] Preferably, the adjusting device comprises an arc sleeve, a sleeve thread, a moving sleeve, a threaded limiting rod and a limiting hole, the sleeve thread is fixedly connected to the outer side wall surface of the outer sleeve, the arc sleeve is slidingly connected to the outer side surface of the sleeve thread, the arc sleeve is divided into a ring part and a spherical part, the upper end of the ring part of the arc sleeve is fixedly connected to the lower end of the moving sleeve, and the upper end of the moving sleeve is slidingly connected to the inner side surface of the shell through the protruding sliding rod.

[0012] Preferably, the limiting hole is arranged on the surface of the outer side wall of the moving sleeve, the surface of the threaded limiting rod is threadedly connected to the inner side surface of the shell, the threaded limiting rod corresponds to the hole in the inner side of the limiting hole at one end of the moving sleeve, and the inner side wall of the limiting clamp block is an arc groove and is fitted with the spherical part of the arc sleeve.

[0013] Preferably, the puncture device comprises a hand-held head, a puncture rod and a puncture tip, the puncture tip is fixedly connected to the lower end of the puncture rod, the hand-held head is fixedly connected to the upper end of the puncture rod, the puncture rod is sleeved on the inner side surface of the outer sleeve tube, and the puncture tip protrudes from the lower end of the outer sleeve tube when the puncture rod is installed in the outer sleeve tube.

[0014] The application provides a use method of a disposable laparoscope puncture device.

[0015] Step one: tear the protective film of adhesive arranged below the fixing ring and stick it around the puncture position, at this time, the puncture position is located between the plurality of limiting clamping blocks, then pull the moving switch to drive the movable ring to rotate, and the rotation drives the roller to move to the inclined surface under the pushing of the extension rod and to the position of the limiting groove, thereby driving the moving block to move outward;

[0016] Step two: move the limiting clamping block to the position of the fixing ring through the fixed rod while the moving block is moving, and the limiting clamping block is stationary after the movement is completed, then install the puncture device in the outer sleeve tube, and aim the puncture tip at the position needing puncture between the limiting clamping blocks, perform the puncture operation, after the puncture is completed, the sleeve thread is located in the skin, then take out the puncture device, adjust the depth of the outer sleeve tube, manually adjust the position of the arc surface sleeve tube, adjust the lower end of the arc surface sleeve tube to the position outside the skin and contacting the skin, then rotate the threaded limiting rod to move one end in the housing to the hole in the limiting hole for limiting,

[0017] Step three: then pull the moving switch back to the original position, thereby moving the roller out of the limiting groove, releasing the limiting of the limiting clamping block, and the limiting clamping block moves to the original position under the elastic force of the spring, the annular groove in the limiting clamping block is attached to the arc surface sleeve tube, and the ball in the limiting clamping block also contacts the arc surface sleeve tube to facilitate the movement of the arc surface sleeve tube, and the trachea is opened to fill the gas into the abdominal cavity, then the surgical instrument is inserted into the abdominal cavity through the outer sleeve tube for operation, after the operation is completed, the instrument is taken out, then the gas in the trachea is discharged, then the moving switch is pulled to move the limiting clamping block to release the limiting of the arc surface sleeve tube, facilitating the removal of the outer sleeve tube, and then the fixing ring is removed to complete the operation.

[0018] (Three) beneficial effects

[0019] The application provides a disposable laparoscope puncture device and method.

[0020] 1. The fixing ring is arranged around the puncture position to fix, slow down the pressure of the inflated gas in the chest cavity on the skin around the puncture position, and reduce the possibility of wound tearing of the puncture position.

[0021] 2、Through the setting of the fixing ring, the fixing device and the limiting device, the outer sleeve is fixed to a certain extent, when the hands need to leave the outer sleeve to take medical equipment, the outer sleeve is limited to the position before the hands leave the outer sleeve, and subsequent contact does not need to adjust the inclination degree of the outer sleeve on the skin for many times, and secondary injury of the wound caused by adjusting the inclination degree of the outer sleeve is reduced.

[0022] 3、Through the setting of the adjusting device, the depth of the outer sleeve inserted into the abdominal cavity can be adjusted, and the outer sleeve is fixed conveniently, and the operation efficiency is improved. DETAILED DESCRIPTION

[0023] Figure 1 It is a whole structure schematic view of the disposable laparoscope puncture device and method;

[0024] Figure 2 It is a top view of the disposable laparoscope puncture device and method;

[0025] Figure 3 It is an internal structure schematic view of the disposable laparoscope puncture device and method;

[0026] Figure 4 It is a first structure schematic view of the limiting device of the disposable laparoscope puncture device and method;

[0027] Figure 5 It is a second structure schematic view of the limiting device of the disposable laparoscope puncture device and method;

[0028] Figure 6 It is a first structure schematic view of the fixing device of the disposable laparoscope puncture device and method;

[0029] Figure 7 It is a second structure schematic view of the fixing device of the disposable laparoscope puncture device and method;

[0030] Figure 8 It is a first structure schematic view of the adjusting device of the disposable laparoscope puncture device and method;

[0031] Figure 9 It is a second structure schematic view of the adjusting device of the disposable laparoscope puncture device and method;

[0032] Figure 10 It is a third structure schematic view of the adjusting device of the disposable laparoscope puncture device and method;

[0033] Figure 11 This is a schematic diagram of the puncture device structure of a disposable laparoscopic puncture instrument and method proposed in this invention.

[0034] The components are as follows: 1. Outer sleeve; 2. Shell; 3. Adjustment device; 301. Arc-shaped sleeve; 302. Sleeve thread; 303. Moving sleeve; 304. Threaded limit rod; 305. Limiting hole; 4. Puncture device; 401. Handheld head; 402. Puncture rod; 403. Puncture tip; 5. Limiting device; 501. Movable ring; 502. Moving switch; 503. Moving block; 504. Extension rod; 505. Roller; 506. Inclined surface; 507. Limiting groove; 6. Fixed ring; 7. Fixing device; 701. Fixed column; 702. Fixed rod; 703. Guide block; 704. Guide rod; 705. Sliding sleeve; 706. Spring; 707. Limiting clamp; 708. Ball bearing; 8. Air tube; 9. Sealing rubber. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figures 1-11 As shown, this embodiment of the invention provides a disposable laparoscopic trocar and method, including an outer tube 1, a housing 2 fixedly connected to the upper end of the outer tube 1, a trocar 4 mounted on the upper surface of the housing 2, a fixing ring 6 arranged around the outer tube 1, a fixing device 7 provided on the inner side wall of the fixing ring 6, a limiting device 5 provided on the inner surface of the fixing ring 6, an adjusting device 3 provided on the outer side wall of the outer tube 1 and below the housing 2, a trachea 8 fixedly connected to the outer side wall of the housing 2, the internal channel of the trachea 8 communicating with the inner side of the housing 2, a sealing rubber 9 fixedly connected to the inner side wall of the housing 2 near the upper end of the housing 2, and adhesive installed on the lower surface of the fixing ring 6.

[0038] The adhesive below the fixation ring 6 is an existing adhesive device used to adhere to the skin. The adhesive can be set to be easy to peel off to prevent damage to the wound. The fixation ring 6 also serves to fix the wound during subsequent suturing of the puncture site to prevent unnecessary stretching or displacement, and at the same time facilitates the connection between wounds.

[0039] The limiting device 5 comprises a movable ring 501, a moving switch 502, a moving block 503, an extension rod 504, a roller 505, an inclined surface 506 and a limiting groove 507, the movable ring 501 is rotationally connected to the inner side surface of the fixed ring 6, the moving switch 502 is fixedly connected to the upper surface of the movable ring 501, the moving block 503 is uniformly provided with four groups and is slidingly connected to the inner side surface of the fixed ring 6, the extension rod 504 is uniformly provided with four groups and is fixedly connected to the inner side surface of the movable ring 501, the roller 505 is fixedly connected to the inner side surface of the protruding end of the extension rod 504, the inclined surface 506 is arranged on the side direction of the moving block 503 close to the outer sleeve pipe 1, the inclined surface 506 corresponds to the roller 505, and the limiting groove 507 is arranged on the side direction of the moving block 503 close to the outer sleeve pipe 1 and is located at one end of the inclined surface 506.

[0040] The limiting groove 507 can provide a certain limitation for the moving block 503 when the roller 505 moves to the position of the limiting groove 507, so that the moving block 503 is prevented from moving by itself.

[0041] The fixing device 7 comprises a fixed column 701, a fixed rod 702, a guide block 703, a guide rod 704, a sliding sleeve pipe 705, a spring 706, a limiting clamp block 707 and a ball 708, one end of the fixed column 701 is fixedly connected to the inner side wall of the fixed ring 6, the other end of the fixed column 701 is sleeved to the inner side surface of the sliding sleeve pipe 705, the spring 706 is mounted to the inner side surface of the sliding sleeve pipe 705, one end of the spring 706 is fixedly connected to the outer side wall surface of the limiting clamp block 707, and the other end of the spring 706 is fixedly connected to the end surface of the fixed column 701 close to the limiting clamp block 707.

[0042] The arrangement of the ball 708 matched with the curved surface sleeve pipe 301 provides a relatively flexible inclination for the curved surface sleeve pipe 301, and meanwhile the ball 708 can clamp the curved surface sleeve pipe 301 to position the inclined outer sleeve pipe 1 to a certain extent, so that the damage to the wound caused by shaking of the hand away from the outer sleeve pipe 1 is prevented.

[0043] The sliding sleeve pipe 705 is fixedly connected to the side surface of the limiting clamp block 707 located at the middle position of the outer side wall, the fixed rod 702 is provided with two groups and is symmetrically arranged between the moving block 503 and the limiting clamp block 707, one end of the fixed rod 702 is fixedly connected to the side surface of the moving block 503 close to the outer sleeve pipe 1, the other end of the fixed rod 702 is fixedly connected to the outer side wall surface of the limiting clamp block 707, the guide block 703 is fixedly connected to the inner side surface of the fixed column 701, one end of the guide rod 704 is fixedly connected to the surface of the sliding sleeve pipe 705 located at one side of the movable ring 501, the other end of the guide rod 704 is slidingly connected to the inner side surface of the guide block 703, and the ball 708 is rotationally connected to the inner side surface of the inner wall of the limiting clamp block 707.

[0044] The arrangement of the ball 708 makes the rotation of the arc sleeve 301 more convenient.

[0045] The adjusting device 3 comprises an arc sleeve 301, a sleeve thread 302, a moving sleeve 303, a threaded limiting rod 304 and a limiting hole 305. The sleeve thread 302 is fixedly connected to the outer side wall surface of the outer sleeve 1. The arc sleeve 301 is slidingly connected to the outer side surface of the sleeve thread 302. The arc sleeve 301 is divided into a ring part and a spherical part. The upper end of the ring part of the arc sleeve 301 is fixedly connected to the lower end of the moving sleeve 303. The upper end of the moving sleeve 303 is slidingly connected to the inner side surface of the shell 2 through a protruding slide rod. The limiting hole 305 is arranged on the surface of the outer side wall of the moving sleeve 303. The surface of the threaded limiting rod 304 is threadedly connected to the inner side surface of the shell 2. The threaded limiting rod 304 is located at one end of the moving sleeve 303 corresponding to the hole on the inner side of the limiting hole 305. The inner side wall of the limiting clamp block 707 is an arc groove and is fitted with the spherical part of the arc sleeve 301.

[0046] The up-down adjustment of the arc sleeve 301 is arranged on one hand to cooperate with the fixing device 7 for positioning and on the other hand to adjust the depth of the outer sleeve 1 into the abdominal cavity.

[0047] The puncture device 4 comprises a handheld head 401, a puncture rod 402 and a puncture tip 403. The puncture tip 403 is fixedly connected to the lower end of the puncture rod 402. The handheld head 401 is fixedly connected to the upper end of the puncture rod 402. The puncture rod 402 is sleeved on the inner side surface of the outer sleeve 1. When the puncture rod 402 is installed in the outer sleeve 1, the puncture tip 403 protrudes from the lower end of the outer sleeve 1.

[0048] The lower part of the handheld head 401 can be provided with an existing buckle device for installing the puncture device 4 on the shell 2, which is convenient for use.

[0049] A use method of a disposable puncture device for laparoscopes is proposed, which comprises the following steps:

[0050] Step one: tear off the protective film of the adhesive arranged below the fixing ring 6 and paste it around the puncture site. At this time, the puncture site is located between the plurality of limiting clamp blocks 707. Then, pull the moving switch 502 to drive the movable ring 501 to rotate. The rotation moves the roller 505 to the inclined surface 506 under the pushing of the extension rod 504 and continues to move to the position of the limiting groove 507, thereby driving the moving block 503 to move outward.

[0051] Step Two: While the moving block 503 moves, the fixed rod 702 drives the limiting clamp 707 to move towards the fixed ring 6. After the movement is completed, it is limited and stationary. Then, the puncture device 4 is installed in the outer tube 1, and the puncture tip 403 is aligned with the position to be punctured between the limiting clamps 707. The puncture operation is performed. After the puncture is completed, the cannula thread 302 is located in the skin. Then, the puncture device 4 is removed. After adjusting the depth of insertion of the outer tube 1, the position of the arc-shaped cannula 301 is manually adjusted so that the lower end of the arc-shaped cannula 301 is adjusted to the position on the outside of the skin and in contact with the skin. Then, the threaded limiting rod 304 is rotated to move the end located in the housing 2 to the hole inside the limiting hole 305 for limiting.

[0052] Step 3: Next, move the movable switch 502 back to its original position, thereby moving the roller 505 out of the limiting groove 507, releasing the limiting clamp 707. Under the elastic force of the spring 706, the limiting clamp 707 moves to its original position. The annular groove inside the limiting clamp 707 fits against the arc-shaped sleeve 301. At the same time, the ball bearing 708 inside the limiting clamp 707 also contacts the arc-shaped sleeve 301 to facilitate the movement of the arc-shaped sleeve 301. Simultaneously, open the trachea 8 to inflate the abdominal cavity with gas. Then, insert the surgical instruments into the abdominal cavity through the outer tube 1 for operation. After the operation is completed, remove the instruments. Then, start the trachea 8 to expel the gas. After that, move the movable switch 502 to move the limiting clamp 707 to release the limiting of the arc-shaped sleeve 301, making it easier to remove the outer tube 1. Finally, remove the fixing ring 6 to complete the operation.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.

[0054] The requirement is to find its equivalents.

Claims

1. A disposable laparoscopic trocar comprising an outer cannula (1), characterized in that: The upper end of the outer sleeve (1) is fixedly connected with a shell (2), a puncture device (4) is installed on the upper surface of the shell (2), a fixing ring (6) is arranged around the outer sleeve (1), a fixing device (7) is arranged on the inner side wall of the fixing ring (6), a limiting device (5) is arranged on the inner surface of the fixing ring (6), an adjusting device (3) is arranged on the outer side wall of the outer sleeve (1) and below the shell (2), a trachea (8) is fixedly connected with the outer side wall of the shell (2), the inner passage of the trachea (8) is communicated with the inner side of the shell (2), a sealing rubber (9) is fixedly connected with the inner side wall of the shell (2) and close to the upper end of the shell (2), and an adhesive is installed on the lower side surface of the fixing ring (6); The limiting device (5) comprises a movable ring (501), a moving switch (502), a moving block (503), an extension rod (504), a roller (505), an inclined surface (506) and a limiting groove (507), the movable ring (501) is rotationally connected with the inner side surface of the fixing ring (6), the moving switch (502) is fixedly connected with the upper surface of the movable ring (501), four groups of the moving block (503) are evenly arranged around the outer sleeve (1) and are slidingly connected with the inner side surface of the fixing ring (6), four groups of the extension rod (504) are fixedly connected with the inner side surface of the movable ring (501), the roller (505) is fixedly connected with the inner side surface of one end of the extension rod (504), the inclined surface (506) is arranged on the side direction of the moving block (503) close to the outer sleeve (1), the inclined surface (506) corresponds to the roller (505), and the limiting groove (507) is arranged on the side direction of the moving block (503) close to the outer sleeve (1) and at one end of the inclined surface (506). The fixing device (7) comprises a fixed column (701), a fixed rod (702), a guide block (703), a guide rod (704), a sliding sleeve (705), a spring (706), a limiting clamp block (707) and a ball (708), one end of the fixed column (701) is fixedly connected with the inner side wall of the fixing ring (6), the other end of the fixed column (701) is sleeved with the inner side surface of the sliding sleeve (705), the spring (706) is installed on the inner side surface of the sliding sleeve (705), one end of the spring (706) is fixedly connected with the outer side wall surface of the limiting clamp block (707), and the other end of the spring (706) is fixedly connected with the end surface of the fixed column (701) close to the limiting clamp block (707).

2. The disposable laparoscopic trocar according to claim 1, wherein: The sliding sleeve (705) is fixedly connected to the side surface of the limiting clamp block (707) at the middle position of the outer side wall, the fixed rod (702) is provided with two groups and symmetrically arranged between the moving block (503) and the limiting clamp block (707), one end of the fixed rod (702) is fixedly connected to the side surface of the moving block (503) close to the outer sleeve (1), the other end of the fixed rod (702) is fixedly connected to the outer side wall surface of the limiting clamp block (707), the guide block (703) is fixedly connected to the inner side surface of the fixed column (701), one end of the guide rod (704) is fixedly connected to the surface of the sliding sleeve (705) at one side of the movable ring (501), the other end of the guide rod (704) is slidingly connected to the inner side surface of the guide block (703), and the rolling ball (708) is rotatably connected to the inner side surface of the inner wall of the limiting clamp block (707).

3. The disposable laparoscopic trocar according to claim 1, wherein: The adjusting device (3) comprises an arc sleeve (301), a sleeve thread (302), a moving sleeve (303), a threaded limiting rod (304) and a limiting hole (305), the sleeve thread (302) is fixedly connected to the outer side wall surface of the outer sleeve (1), the arc sleeve (301) is slidingly connected to the outer side surface of the sleeve thread (302), the arc sleeve (301) is divided into a ring part and a spherical part, the upper end of the ring part of the arc sleeve (301) is fixedly connected to the lower end of the moving sleeve (303), and the upper end of the moving sleeve (303) is slidingly connected to the inner side surface of the shell (2) through the protruding sliding rod.

4. The disposable laparoscopic trocar according to claim 3, wherein: The limiting hole (305) is arranged on the surface of the outer side wall of the moving sleeve (303), the surface of the threaded limiting rod (304) is threadedly connected to the inner side surface of the shell (2), one end of the threaded limiting rod (304) corresponds to the hole in the inner side of the limiting hole (305), and the inner side wall of the limiting clamp block (707) is an arc groove and is fitted with the spherical part of the arc sleeve (301).

5. The single-use laparoscopic trocar of claim 1, wherein: The puncture device (4) comprises a handheld head (401), a puncture rod (402) and a puncture tip (403), the puncture tip (403) is fixedly connected to the lower end of the puncture rod (402), the handheld head (401) is fixedly connected to the upper end of the puncture rod (402), the puncture rod (402) is sleeved on the inner side surface of the outer sleeve (1), and when the puncture rod (402) is installed in the outer sleeve (1), the puncture tip (403) protrudes from the lower end of the outer sleeve (1).

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