Remaining needle with auxiliary puncture and needle withdrawing functions
By designing an indwelling needle with auxiliary puncture and retardation functions, the problems of cumbersome operation of traditional indwelling needles, high failure rate of retardation and low safety are solved, and stable puncture and efficient retardation of one-handed operation are achieved, and safety is improved.
Patent Information
- Application Number
- CN202420872056.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The traditional butterfly indwelling needle has complicated steps in puncture and tube retention operations, and requires cooperation between both hands, resulting in a large swing of the needle tip, a high failure rate for tube retention, and the needle is exposed after the needle is removed, which is low in safety.
A recessed needle with auxiliary puncture and needle withdrawal functions was designed. By fitting the needle handle base in the needle withdrawal cannula, combining the needle retraction cannula and piston rod design, stable puncture and efficient tube retraction for one-hand operation, and safe return of the steel needle is achieved through rotary clamping blocks and push-plate slots.
It improves the puncture success rate and tube retention effectiveness, reduces operating steps, enhances stability and safety, and avoids the risk of needle stab injuries.
Smart Images
Figure CN222640566U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a medical auxiliary device, in particular to an indwelling needle, and in particular to an indwelling needle with auxiliary puncture and needle withdrawal functions. Background Art
[0002] Disposable butterfly indwelling needle is used for vascular punctures such as arterial puncture, venous puncture, central vein puncture, and sacral nerve block in children. During traditional butterfly-style indwelling needle puncture, the thumb and middle finger are used to fix the butterfly wing, and the index finger is used to stabilize the position of the needle handle and tube seat. After the steel needle head punctures into the target blood vessel and blood returns smoothly, the operator needs to change hands to stabilize the butterfly wing, and then use the other hand to push the push plate on the indwelling needle handle tube seat forward, so that the indwelling needle hose runs forward to complete the tube refilling operation, and then withdraw the steel needle and needle handle base from the needle tube sleeve; or the thumb is placed on the tail end of the needle handle base, and the index finger is placed on the butterfly wing position to fix it. After the steel needle head punctures into the target blood vessel and blood returns smoothly, the operator needs to change hands to push the push plate forward, so that the indwelling needle hose runs forward to refill the tube, and the steel needle moves relatively and is pushed out; or the butterfly wing is fixed, and then the other hand withdraws the needle handle base from the needle tube sleeve, while the left hand pushes the butterfly wing forward to refill the tube.
[0003] The above-mentioned methods of changing hands to renew the tube all have complicated operation steps and require both hands to operate at the same time. When completing a series of operations such as changing hands, fixing, withdrawing the needle, and renewing the tube in steps, the needle tip swings greatly and the failure rate of renewing the tube is high. In addition, after the renewing and withdrawing the needle operation is completed, the steel needle is exposed to the outside, which is easy to cause needlestick injuries, and the safety factor is low.
[0004] Therefore, an indwelling needle with a simple structure, convenient operation, stable operation, high puncture success rate, avoidance of needle shaking, high tube renewing efficiency, strong stability, single-handed operation, improved work and operation efficiency, reduced tube renewing operation steps during puncture operation, high tube renewing success rate, avoidance of needle stick injuries, high safety, and an auxiliary puncture and needle withdrawal function is provided, which has broad market prospects. Summary of the invention
[0005] In view of the shortcomings of the prior art, the utility model provides an indwelling needle with a simple structure, convenient operation, stable operation, high puncture success rate, avoidance of needle shaking, high tube renewing efficiency, strong stability, and single-handed operation, which improves work and operation efficiency, reduces the number of tube renewing operation steps during puncture operation, has a high tube renewing success rate, avoids needle stick injuries, and is highly safe, and has auxiliary puncture and needle withdrawal functions, which is used to overcome the defects in the prior art.
[0006] The technical solution of the utility model is achieved as follows: an indwelling needle with auxiliary puncture and needle withdrawal functions, comprising a needle handle base, a steel needle, a needle tube sleeve, an indwelling needle hose, a push plate and a butterfly wing, the needle handle base is sleeved in the needle withdrawal sleeve, a side wall of the needle withdrawal sleeve is provided with a needle withdrawal positioning slot, a needle withdrawal sliding block fixedly connected to the tail of the needle handle base is movably installed in the needle withdrawal positioning slot, a follow-up needle sleeve is fixedly installed on the upper part of the needle withdrawal sleeve, a piston rod is installed in the follow-up needle sleeve, the outer end of the piston rod is fixedly connected to the rotating shaft block, the rotating shaft block is fixedly connected to the rotating clamping block through a push-pull groove portion, a push plate clamping block is arranged below the push-pull groove portion, a push plate clamping groove matching with the push plate is arranged between the push plate clamping block and the rotating clamping block, and a pinching seat matching with the rotating shaft block is fixedly installed on the other side wall of the needle withdrawal sleeve.
[0007] The bottom of the rotating clamping block is fixedly mounted with a needle-continue stabilizing auxiliary connecting block, and the bottom of the needle-continue stabilizing auxiliary connecting block is provided with a side wing clamping groove matched with the butterfly-type side wing.
[0008] The needle withdrawal positioning slot extends from the middle front part of the needle withdrawal sleeve to the tail part of the needle withdrawal sleeve. The needle withdrawal sleeve is a cylindrical tube structure with an opening at the front end. The inner diameter of the needle withdrawal sleeve matches the outer diameter of the needle handle base.
[0009] The outer end of the needle withdrawal sliding block is fixedly installed with a needle withdrawal pulling block, the outer end of the indwelling needle hose is sleeved with an anti-needle puncture sleeve, and the front side of the holding seat is provided with an anti-slip layer.
[0010] The length of the needle extension sleeve is not less than the length of the steel needle, the front end of the needle extension sleeve is flush with the front end of the needle withdrawal sleeve, and a piston block connected to the inner end of the piston rod is installed in the needle extension sleeve.
[0011] The inner end of the rotating shaft block is located at the upper rear side of the front end opening of the needle follower sleeve, and the bottom of the rotating shaft block is located at the outer side of the circumferential direction of the needle follower sleeve.
[0012] The rotating clamping block is a semicircular block structure, and a rotating pull groove is arranged on one side of the rotating clamping block facing the positioning slot.
[0013] The inner side of the top of the holding seat is provided with a rotating shaft block clamping groove matched with the rotating shaft block.
[0014] The auxiliary connection block for stabilizing the needle continuation is a sheet-like structure with an arc-shaped outer side surface. The auxiliary connection block for stabilizing the needle continuation is an integral structure with the rotating clamping block. The inner side surface of the auxiliary connection block for stabilizing the needle continuation is provided with a groove portion that matches the outer side surface of the needle tube sleeve.
[0015] The utility model has the following positive effects:
[0016] 1. This product is improved on the basis of the original traditional butterfly-type indwelling needle. The base of the needle handle is installed in the needle withdrawal sleeve to form an integral indwelling needle structure, which extends the length of the indwelling needle. During the overall operation, it is helpful to increase the rear length during the needle continuation process and improve the stability of the needle continuation. At the same time, the needle withdrawal sleeve becomes the withdrawal and accommodation space for the steel needle after the needle continuation operation. After the needle continuation operation is completed, the needle withdrawal sliding block moves backward to drive the needle handle base and the steel needle to realize that the steel needle is completely accommodated in the needle withdrawal sleeve. The needle will not leak out during the discard collection operation, and needle stick injuries will not occur during the subsequent processing.
[0017] 2. This product is equipped with a needle follow-up sleeve for use with a needle tube sleeve, and uses a piston rod that can translate in the needle follow-up sleeve to drive the rotating clamping block and the push plate clamping groove to clamp the push plate, and then reserves a push-pull groove to provide bottom support for the index finger when performing the push-pull operation, thereby achieving the forward movement of the needle tube sleeve for needle follow-up operation by limiting the push-pull groove.
[0018] 3. In order to improve the stability and flexibility of this product during operation, and to enable the push plate slot to detach from the push plate after the needle is continued, so as to realize the withdrawal of the steel needle and its recovery into the needle withdrawal sleeve, this product is provided with a rotating clamping block, and cooperates with the use of a rotating dial groove. When the rotating dial groove provided on the rotating clamping block is dialed, the rotating clamping block can rotate in a circle with the axis of the piston rod as a circle, and rotate the rotating shaft block into the rotating shaft block clamping groove, so as to realize the detachment of the components after the needle is continued, and avoid the influence of the rotating clamping block on the needle sleeve due to shaking or movement.
[0019] 4. In order to further improve the stability during operation, this product is equipped with a needle stabilization auxiliary connection block, which uses the side wing clamping groove after rotation and positioning to clamp the butterfly side wing to achieve the stability of the needle sleeve during the needle push forward process. At the same time, after the needle is in place, the needle stabilization auxiliary connection block can follow the rotation of the piston rod to separate from the butterfly side wing. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the main structure of the utility model.
[0021] Figure 2 It is a rear view structural schematic diagram of the utility model.
[0022] Figure 3 It is a partial structural schematic diagram of the utility model.
[0023] Figure 4 It is a right side structural schematic diagram of the utility model after being clamped.
[0024] Figure 5 It is a left-side structural schematic diagram of the utility model after being clamped.
[0025] Figure 6It is a right side structural schematic diagram of the utility model after being disengaged from the clamping connection.
[0026] Figure 7 It is a left-side structural schematic diagram of the utility model after being disengaged from the clamping connection.
[0027] Figure 8 This is one of the schematic diagrams of the structure of the utility model in use state.
[0028] Fig. 9 This is the second schematic diagram of the structure of the utility model in use state. DETAILED DESCRIPTION
[0029] like Figure 1 , 2 , 3, 4, 5, 6, 7, 8, and 9 show an indwelling needle with auxiliary puncture and needle withdrawal functions, comprising a needle handle base 3, a steel needle 8 fixedly mounted on the front end of the needle handle base 3, a needle tube sleeve 5 sleeved on the outside of the steel needle 8, an indwelling needle hose 6 mounted on the front end of the needle tube sleeve 5, a push plate 9 and a butterfly wing 22 respectively arranged at the top and bottom of the needle tube sleeve 5, the needle handle base 3 is sleeved in the needle withdrawal sleeve 1, and a needle withdrawal positioning slot 2 is provided on one side wall of the needle withdrawal sleeve 1, and a part fixedly connected to the tail of the needle handle base 3 is movably mounted in the needle withdrawal positioning slot 2. A needle withdrawal sliding block 19, a needle refilling sleeve 10 is fixedly installed on the upper part of the needle withdrawal sleeve 1, a piston rod 12 is installed in the needle refilling sleeve 10, the outer end of the piston rod 12 is fixedly connected with the rotating shaft block 13, the rotating shaft block 13 is fixedly connected with the rotating clamping block 15 through the push-pull groove portion 14, a push plate clamping block 17 is arranged below the push-pull groove portion 14, a push plate clamping groove 24 matched with the push plate 9 is arranged between the push plate clamping block 17 and the rotating clamping block 15, and a pinching seat 20 matched with the rotating shaft block 13 is fixedly installed on the side wall of the other side of the needle withdrawal sleeve 1.
[0030] The bottom of the rotating clamping block 15 is fixedly mounted with a needle stabilizing auxiliary connection block 18, and the bottom of the needle stabilizing auxiliary connection block 18 is provided with a side wing clamping groove 23 that matches the butterfly side wing 22. The needle stabilizing auxiliary connection block 18 is a sheet-like structure with an arc surface on the outer side, and the needle stabilizing auxiliary connection block 18 and the rotating clamping block 15 are an integral structure, and the inner side of the needle stabilizing auxiliary connection block 18 is provided with a groove portion 25 that matches the outer side of the needle tube sleeve 5.
[0031] The needle withdrawal positioning slot 2 extends from the middle front part of the needle withdrawal sleeve 1 to the tail part of the needle withdrawal sleeve 1. The needle withdrawal sleeve 1 is a cylindrical tube structure with an opening at the front end. The inner diameter of the needle withdrawal sleeve 1 matches the outer diameter of the needle handle base 3. The outer end of the needle withdrawal sliding block 19 is fixedly installed with a needle withdrawal pull block 4, the outer end of the indwelling needle hose 6 is sleeved with an anti-needle puncture sleeve 7, and the front side of the holding seat 20 is provided with an anti-slip layer 21. The length of the needle continuation sleeve 10 is not less than the length of the steel needle 8. The front end of the needle continuation sleeve 10 is flush with the front end of the needle withdrawal sleeve 1, and a piston block 11 connected to the inner end of the piston rod 12 is installed in the needle continuation sleeve 10. The inner end of the rotating shaft block 13 is located at the upper rear side of the front end opening of the needle continuation sleeve 10, and the bottom of the rotating shaft block 13 is located on the outer side of the needle continuation sleeve 10 in the circumferential direction. The rotating clamping block 15 is a semicircular block structure, and a rotating pull groove 16 is arranged on one side of the rotating clamping block 15 facing the positioning slot 2. A rotating shaft block clamping groove matching with the rotating shaft block 13 is arranged on the inner side of the top of the holding seat 20.
[0032] In order to further describe the present invention in detail, the following examples are provided.
[0033] Example 1: This example refers to Figure 1 , 2 , 3, 4, 5, 6, 7, 8, and 9. It should be noted that the structure of this embodiment does not include the needle stabilization auxiliary connection block 18 and the side wing clamping groove 23. This embodiment includes a needle handle base 3, a steel needle 8 fixedly installed at the front end of the needle handle base 3, a needle tube sleeve 5 sleeved on the outside of the steel needle 8, an indwelling needle hose 6 installed at the front end of the needle tube sleeve 5, a push plate 9 and a butterfly side wing 22 respectively arranged at the top and bottom of the needle tube sleeve 5, the needle handle base 3 is sleeved in the needle withdrawal sleeve 1, and a needle withdrawal positioning slot 2 is provided on one side wall of the needle withdrawal sleeve 1, and a needle withdrawal sliding block 19 fixedly connected to the tail of the needle handle base 3 is movably installed in the needle withdrawal positioning slot 2, and the upper part of the needle withdrawal sleeve 1 A needle refill sleeve 10 is fixedly installed, and a piston rod 12 is installed in the needle refill sleeve 10. The outer end of the piston rod 12 is fixedly connected to a rotating shaft block 13. The rotating shaft block 13 is fixedly connected to a rotating clamping block 15 through a push-pull groove portion 14. A push plate clamping block 17 is arranged below the push-pull groove portion 14. A push plate clamping groove 24 that cooperates with the push plate 9 is arranged between the push plate clamping block 17 and the rotating clamping block 15. A pinching seat 20 that cooperates with the rotating shaft block 13 is fixedly installed on the other side wall of the needle withdrawal sleeve 1.
[0034] The needle withdrawal positioning slot 2 extends from the middle front part of the needle withdrawal sleeve 1 to the tail part of the needle withdrawal sleeve 1. The needle withdrawal sleeve 1 is a cylindrical tube structure with an opening at the front end. The inner diameter of the needle withdrawal sleeve 1 matches the outer diameter of the needle handle base 3. The outer end of the needle withdrawal sliding block 19 is fixedly installed with a needle withdrawal pull block 4, the outer end of the indwelling needle hose 6 is sleeved with an anti-needle puncture sleeve 7, and the front side of the holding seat 20 is provided with an anti-slip layer 21. The length of the needle continuation sleeve 10 is not less than the length of the steel needle 8. The front end of the needle continuation sleeve 10 is flush with the front end of the needle withdrawal sleeve 1, and a piston block 11 connected to the inner end of the piston rod 12 is installed in the needle continuation sleeve 10. The inner end of the rotating shaft block 13 is located at the upper rear side of the front end opening of the needle continuation sleeve 10, and the bottom of the rotating shaft block 13 is located on the outer side of the needle continuation sleeve 10 in the circumferential direction. The rotating clamping block 15 is a semicircular block structure, and a rotating pull groove 16 is arranged on one side of the rotating clamping block 15 facing the positioning slot 2. A rotating shaft block clamping groove matching with the rotating shaft block 13 is arranged on the inner side of the top of the holding seat 20.
[0035] During operation, the anti-acupuncture sleeve 7 is removed, the thumb is in contact with the needle handle base 3, and the middle finger is in contact with the holding seat 20, so that the thumb and the middle finger are in a state of holding the needle handle base 3, and then the indwelling needle hose 6 sleeved on the outside of the steel needle 8 is directed to the corresponding puncture position. In the initial state, the push plate slot 24 is engaged with the push plate. After aligning the position, the index finger falls into the push-pull groove 14 and pushes the rotating clamping block 15 forward. The rotating clamping block 15 drives the push plate clamping block 17 to move forward. During the movement, the push plate 9 engaged in the push plate slot 24 drives the needle tube sleeve 5 to move forward to complete the tube extension. After the tube extension is completed, the index finger swings the rotating clamping block 15, the push plate slot 24 is separated from the push plate 9, and the rotating shaft block 13 rotates around the piston rod 12, and finally contacts the rotating shaft block clamping groove on the holding seat 20 for limiting support. After the tube is renewed, the steel needle 8 is exposed. At this time, the needle withdrawal sliding block 19 is moved in the needle withdrawal positioning slot. The needle withdrawal sliding block 19 drives the needle handle base 3 to move toward the rear part of the needle withdrawal sleeve 1 along the needle withdrawal positioning slot 2 under the limiting action, until the steel needle 8 falls completely into the needle withdrawal sleeve 1, completing the needle withdrawal and anti-needle puncture recovery operation.
[0036] Example 2: Figure 1 , 2, 3, 4, 5, 6, 7, 8, and 9 show an indwelling needle with auxiliary puncture and needle withdrawal functions, comprising a needle handle base 3, a steel needle 8 fixedly mounted on the front end of the needle handle base 3, a needle tube sleeve 5 sleeved on the outside of the steel needle 8, an indwelling needle hose 6 mounted on the front end of the needle tube sleeve 5, a push plate 9 and a butterfly wing 22 respectively arranged at the top and bottom of the needle tube sleeve 5, the needle handle base 3 is sleeved in the needle withdrawal sleeve 1, and a needle withdrawal positioning slot 2 is provided on one side wall of the needle withdrawal sleeve 1, and a part fixedly connected to the tail of the needle handle base 3 is movably mounted in the needle withdrawal positioning slot 2. The needle withdrawal sliding block 19, the needle withdrawal sleeve 1 is fixedly installed with the needle continuation sleeve 10 on the upper part, the piston rod 12 is installed in the needle continuation sleeve 10, the outer end of the piston rod 12 is fixedly connected with the rotating shaft block 13, the rotating shaft block 13 is fixedly connected with the rotating clamping block 15 through the push-pull groove portion 14, a push plate clamping block 17 is arranged below the push-pull groove portion 14, a push plate clamping groove 24 matching with the push plate 9 is arranged between the push plate clamping block 17 and the rotating clamping block 15, and a holding seat 20 matching with the rotating shaft block 13 is fixedly installed on the other side wall of the needle withdrawal sleeve 1. The bottom of the rotating clamping block 15 is fixedly installed with the needle continuation stabilization auxiliary connection block 18, and the bottom of the needle continuation stabilization auxiliary connection block 18 is provided with a side wing clamping groove 23 matching with the butterfly side wing 22. The auxiliary connection block 18 for stabilizing the needle continuation is a sheet-like structure with an arc-shaped outer side surface. The auxiliary connection block 18 for stabilizing the needle continuation is an integral structure with the rotating clamping block 15. The inner side surface of the auxiliary connection block 18 for stabilizing the needle continuation is provided with a groove portion 25 that matches the outer side surface of the needle tube sleeve 5.
[0037] The needle withdrawal positioning slot 2 extends from the middle front part of the needle withdrawal sleeve 1 to the tail part of the needle withdrawal sleeve 1. The needle withdrawal sleeve 1 is a cylindrical tube structure with an opening at the front end. The inner diameter of the needle withdrawal sleeve 1 matches the outer diameter of the needle handle base 3. The outer end of the needle withdrawal sliding block 19 is fixedly installed with a needle withdrawal pull block 4, the outer end of the indwelling needle hose 6 is sleeved with an anti-needle puncture sleeve 7, and the front side of the holding seat 20 is provided with an anti-slip layer 21. The length of the needle continuation sleeve 10 is not less than the length of the steel needle 8. The front end of the needle continuation sleeve 10 is flush with the front end of the needle withdrawal sleeve 1, and a piston block 11 connected to the inner end of the piston rod 12 is installed in the needle continuation sleeve 10. The inner end of the rotating shaft block 13 is located at the upper rear side of the front end opening of the needle continuation sleeve 10, and the bottom of the rotating shaft block 13 is located on the outer side of the needle continuation sleeve 10 in the circumferential direction. The rotating clamping block 15 is a semicircular block structure, and a rotating pull groove 16 is arranged on one side of the rotating clamping block 15 facing the positioning slot 2. A rotating shaft block clamping groove matching with the rotating shaft block 13 is arranged on the inner side of the top of the holding seat 20.
[0038] During operation, the anti-needle puncture sleeve 7 is removed, the thumb is in contact with the needle handle base 3, and the middle finger is in contact with the pinching seat 20, so that the thumb and middle finger are in a state of pinching the needle handle base 3, and then the indwelling needle hose 6 sleeved on the outside of the steel needle 8 is directed to the corresponding puncture position. In the initial state, the push plate slot 24 is engaged with the push plate, and the side wing slot 23 is engaged with the butterfly side wing 22.
[0039] After the alignment, the index finger falls into the push-pull groove 14 and pushes the rotating clamping block 15 forward. The rotating clamping block 15 drives the push plate clamping block 17 to move forward. During the movement, the push plate 9 clamped in the push plate clamping groove 24 drives the needle tube sleeve 5 to move forward to complete the tube extension. After the tube extension is completed, the index finger swings the rotating clamping block 15, the push plate clamping groove 24 is separated from the push plate 9, and the side wing clamping groove 23 and the butterfly side wing 22 are also separated. The rotating shaft block 13 rotates around the piston rod 12 and finally contacts the limiting support with the rotating shaft block clamping groove on the holding seat 20. After the tube extension is completed, the steel needle 8 is exposed. At this time, the needle withdrawal sliding block 19 is moved in the needle withdrawal positioning slot hole. The needle withdrawal sliding block 19 drives the needle handle base 3 to move toward the rear of the needle withdrawal sleeve 1 along the needle withdrawal positioning slot hole 2 under the limiting action until the steel needle 8 falls into the needle withdrawal sleeve 1 completely, completing the needle withdrawal anti-needle puncture recovery operation.
Claims
1. An indwelling needle with auxiliary puncture and needle withdrawal functions, comprising a needle handle base (3), a steel needle (8), a needle sleeve (5), an indwelling needle hose (6), a push plate (9) and a butterfly-type side wing (22), characterized in that: The needle handle base (3) is sleeved in the needle withdrawal sleeve (1), a side wall of the needle withdrawal sleeve (1) is provided with a needle withdrawal positioning slot (2), a needle withdrawal sliding block (19) fixedly connected to the tail of the needle handle base (3) is movably installed in the needle withdrawal positioning slot (2), a needle follower sleeve (10) is fixedly installed on the upper part of the needle withdrawal sleeve (1), a piston rod (12) is installed in the needle follower sleeve (10), and the outer end of the piston rod (12) is connected to the rotating shaft block (10) by the outer end of the piston rod (12). 13), the rotating shaft block (13) is fixedly connected with the rotating clamping block (15) through the push-pull groove portion (14), a push plate clamping block (17) is arranged below the push-pull groove portion (14), a push plate clamping groove (24) matching with the push plate (9) is arranged between the push plate clamping block (17) and the rotating clamping block (15), and a holding seat (20) matching with the rotating shaft block (13) is fixedly installed on the other side wall of the needle withdrawal sleeve (1).
2. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The bottom of the rotating clamping block (15) is fixedly mounted with a needle-continue stabilizing auxiliary connecting block (18), and the bottom of the needle-continue stabilizing auxiliary connecting block (18) is provided with a side wing clamping groove (23) that matches the butterfly side wing (22).
3. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The needle withdrawal positioning slot (2) extends from the middle front part of the needle withdrawal sleeve (1) to the tail part of the needle withdrawal sleeve (1). The needle withdrawal sleeve (1) is a cylindrical tube structure with an opening at the front end. The inner diameter of the needle withdrawal sleeve (1) matches the outer diameter of the needle handle base (3).
4. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The outer end of the needle withdrawal sliding block (19) is fixedly mounted with a needle withdrawal pull block (4), the outer end of the indwelling needle hose (6) is sleeved with an anti-needle puncture sleeve (7), and the front side of the holding seat (20) is provided with an anti-slip layer (21).
5. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The length of the needle extension sleeve (10) is not less than the length of the steel needle (8), the front end of the needle extension sleeve (10) is flush with the front end of the needle withdrawal sleeve (1), and a piston block (11) connected to the inner end of the piston rod (12) is installed in the needle extension sleeve (10).
6. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The inner end of the rotating shaft block (13) is located at the upper rear side of the front end opening of the needle follower sleeve (10), and the bottom of the rotating shaft block (13) is located at the outer side of the needle follower sleeve (10) in the circumferential direction.
7. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The rotating clamping block (15) is a semicircular block structure, and a rotating pull groove (16) is arranged on one side of the rotating clamping block (15) facing the positioning slot hole (2).
8. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 1, characterized in that: The inner side of the top of the holding seat (20) is provided with a rotating shaft block engaging groove which matches the rotating shaft block (13).
9. The indwelling needle with auxiliary puncture and needle withdrawal functions according to claim 2, characterized in that: The auxiliary connection block (18) for stabilizing the needle continuation is a sheet-like structure with an arc-shaped outer side surface. The auxiliary connection block (18) for stabilizing the needle continuation is an integral structure with the rotating clamping block (15). The inner side surface of the auxiliary connection block (18) for stabilizing the needle continuation is provided with a groove portion (25) that matches the outer side surface of the needle tube sleeve (5).