Needle assisting device and medical device

Abstract

The utility model discloses a needle assisting device and a medical device. The needle assisting device comprises an implanting seat; a remaining needle; the puncture needle seat comprises a puncture needle; the bottom plate comprises a bottom plate buckle; an indwelling needle is detachably fixed below the implanting seat; the implantation seat is detachably connected with the puncture needle seat, the puncture needle seat is coupled with the implantation seat during needle implantation, and the puncture needle seat is dissociated from the implantation seat during needle withdrawal; the puncture needle penetrates through the remaining needle. In the application, the indwelling needle is directly fixed by the implantation seat, and the implantation seat is coupled with the puncture needle seat, so that the puncture needle seat and the puncture needle move downwards along with the implantation seat in the needle implantation process, before the implantation seat and the puncture needle seat are decoupled, the puncture needle is ensured to penetrate through the indwelling needle, and when the implantation seat and the puncture needle seat are decoupled, the puncture needle is ensured to penetrate through the indwelling needle. The puncture needle seat and the puncture needle are pushed by the needle withdrawing spring to move away from the bottom plate, and if the remaining needle is not implanted in place at the moment, the remaining needle can be continuously pushed downwards by the implanting seat until the remaining needle is reliably buckled with the bottom plate buckle. The device has the advantages of stable and reliable use, high needle planting success rate and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a needle assisting device and a medical device. BACKGROUND

[0002] Insulin is a hormone that can lower blood sugar, while promoting glycogen, fat, protein synthesis. Exogenous insulin is mainly used to treat diabetes. The patch type insulin pump needs to inject the drug solution into the user's body smoothly and reliably through the subcutaneous implantation of the pipeline, and the subcutaneously implanted pipeline needs to be implanted into the user's body by the needle assisting system and fixed safely and reliably. The needle assisting system of the prior art can refer to patent CN116159206A, which mainly includes a base plate, a needle assisting assembly, a subcutaneously implanted pipeline, etc.

[0003] In the needle assisting system of the prior art, the indwelling needle is usually fixed by the puncture needle seat, and the puncture needle seat is fixed by the implantation seat. In use, the spring pushes the implantation seat, the implantation seat pushes the puncture needle seat, the puncture needle seat pushes the indwelling needle to implant, and the indwelling needle is withdrawn until the indwelling needle is just clamped by the base plate. In fact, due to unavoidable problems such as manufacturing errors or design gaps, it is difficult to grasp the timing of withdrawing the needle, which may cause the implantation to fail due to early withdrawal or non-withdrawal of the needle. UTILITY MODEL CONTENT

[0004] Therefore, the present application provides a needle assisting device and a medical device, which can solve the above-mentioned technical problems. The present application provides the following technical solutions:

[0005] A needle assisting device, comprising: an implantation seat; an indwelling needle; a puncture needle seat comprising a puncture needle; a base plate comprising a base plate buckle for fixing the indwelling needle; the indwelling needle is detachably fixed below the implantation seat; the implantation seat and the puncture needle seat are detachably connected, wherein the puncture needle seat and the implantation seat are coupled during needle implantation, and the puncture needle seat and the implantation seat are decoupled during needle withdrawal; the puncture needle passes through the indwelling needle.

[0006] Optionally, further comprising: a safety cap, a top shell, a shell, an implantation spring, a needle withdrawal spring, and an implantation button, wherein: the safety cap is located above the top shell; the top shell, the shell, and the base plate combine to form a containing cavity; the puncture needle seat, the implantation seat, the puncture needle, the indwelling needle, the implantation spring, and the needle withdrawal spring are located in the containing cavity; at least a part of the implantation button is located in the containing cavity and is used to trigger the needle implantation action; the implantation spring is located between the top shell and the implantation seat, the implantation spring is in a compressed state before needle implantation, and the implantation spring is released and pushes the puncture needle seat, the implantation seat, the puncture needle, and the indwelling needle to move downward during needle implantation; the needle withdrawal spring is located between the implantation seat and the puncture needle seat, the needle withdrawal spring is in a compressed state before needle withdrawal, and the needle withdrawal spring is released and pushes the puncture needle seat and the puncture needle to move upward during needle withdrawal.

[0007] Optionally, the puncture needle base comprises a side wing hook, the bottom of the side wing hook has a first slope; the implant base comprises a side wall clamping hole capable of matching the side wing hook; the shell comprises a bottom column, the top of the bottom column has a second slope matching the first slope; the side wing hook and the side wall clamping hole are used to realize the coupling of the puncture needle base and the implant base; and the bottom column is used to assist the decoupling of the puncture needle base and the implant base.

[0008] Optionally, the implant base and the implant key are integrated structures.

[0009] Optionally, the safety cap comprises an inner safety column arranged inside the implant key and an outer safety shell arranged outside the implant key.

[0010] Optionally, the shell and the bottom plate are coupled or decoupled through relative rotation; the needle helper further comprises a rotation stopping structure used to prevent undesired decoupling between the shell and the bottom plate.

[0011] Optionally, the rotation stopping structure comprises a rotation stopping block, the implant key contacts the top of the rotation stopping block before implanting the needle to lock the rotation stopping block, and the implant key is away from the top of the rotation stopping block after implanting the needle to unlock the rotation stopping block.

[0012] Optionally, the rotation stopping structure further comprises an unlocking spring, the first end of the unlocking spring abuts the lower surface of the first protrusion on the rotation stopping block, and the second end of the unlocking spring abuts the upper surface of the second protrusion on the shell.

[0013] Optionally, the elastic member is arranged between the puncture needle base and the indwelling needle.

[0014] A medical device comprising an insulin pump and the needle helper.

[0015] In the technical solution of the present application, the indwelling needle is directly fixed by the implant base, and the implant base is coupled with the puncture needle base, which makes the product in use push the implant base by the implant spring to push the indwelling needle to move downward, and because the implant base and the puncture needle base are coupled together, the puncture needle base and the puncture needle follow the implant base to move downward, and before the implant base and the puncture needle base are decoupled, the puncture needle is ensured to penetrate the indwelling needle, and the puncture needle tip exceeds the indwelling needle tip. When the implant base and the puncture needle base are decoupled, the puncture needle base and the puncture needle are pushed away from the bottom plate by the needle withdrawal spring, at this time, if the indwelling needle has not been implanted in place, the implant base can continue to push downward until the reliable and bottom plate clamping buckle is buckled. Because the puncture needle penetrates the indwelling needle, the puncture needle tip exceeds the indwelling needle tip by a distance (at least 1-2 mm), and this distance is enough to ensure the implant reliability of the indwelling needle being continuously pushed downward by the implant base. The present application can improve the probability of the indwelling needle being implanted in place, and has the advantages of stable and reliable use, high implanting needle success rate, etc. BRIEF DESCRIPTION OF DRAWINGS

[0016] For the purpose of illustration and not limitation, the present application will now be described according to the preferred embodiments of the present application, with particular reference to the figures, wherein:

[0017] Figure 1 is a cross-sectional view of a needle guide according to an example embodiment of the present application;

[0018] Figure 2A is a perspective view of a safety cap in a needle guide according to an example embodiment of the present application Figure 1 ;

[0019] Figure 2B is a perspective view of a safety cap in a needle guide according to an example embodiment of the present application

[0020] Figure 3A is a perspective view of a top housing in a needle guide according to an example embodiment of the present application Figure 1 ;

[0021] Figure 3B is a perspective view of a top housing in a needle guide according to an example embodiment of the present application

[0022] Figure 4A is a perspective view of a housing in a needle guide according to an example embodiment of the present application Figure 1 ;

[0023] Figure 4B is a perspective view of a housing in a needle guide according to an example embodiment of the present application

[0024] Figure 5A is a perspective view of a piercing needle seat in a needle guide according to an example embodiment of the present application Figure 1 ;

[0025] Figure 5B is a perspective view of a piercing needle seat in a needle guide according to an example embodiment of the present application

[0026] Figure 6A is a perspective view of an implant seat in a needle guide according to an example embodiment of the present application Figure 1 ;

[0027] Figure 6B is a perspective view of an implant seat in a needle guide according to an example embodiment of the present application

[0028] Figure 7 is a perspective view of a bottom plate in a needle guide according to an example embodiment of the present application;

[0029] Figure 8 is a perspective view of a stopper in a needle guide according to an example embodiment of the present application;

[0030] Figure 9 is a partial cross-sectional view of the fixed condition of the puncture needle and the indwelling needle in the needle helper according to an example embodiment of the present application;

[0031] Figure 10 is a partial cross-sectional view of the coupling of the implant seat and the puncture needle seat in the needle helper according to an example embodiment of the present application;

[0032] Figure 11 is a partial cross-sectional view of the decoupling of the implant seat and the puncture needle seat in the needle helper according to an example embodiment of the present application;

[0033] Figure 12 is a schematic view of the coupling or decoupling of the housing and the bottom plate by relative rotation in the needle helper according to an example embodiment of the present application;

[0034] Figure 13 is a cross-sectional view of the locking of the rotation stopper in the needle helper according to an example embodiment of the present application;

[0035] Figure 14 is a peripheral partial view of the locking of the rotation stopper in the needle helper according to an example embodiment of the present application;

[0036] Figure 15 is a cross-sectional view of the unlocking of the rotation stopper in the needle helper according to an example embodiment of the present application;

[0037] Figure 16 is a partial cross-sectional view of the elastic member in the needle helper according to an example embodiment of the present application;

[0038] Figures 17A to 17I is a process schematic view of the method of using the needle helper according to an example embodiment of the present application.

[0039] In the drawings:

[0040] safety cap 1, inner safety column 101, outer safety shell 102, top shell 2, housing 3, bottom stand 301, second slope 3011, puncture needle seat 4, side wing catch 401, first slope 4011, implant seat 5, implant button 510, side wall catch hole 501, puncture needle 6, indwelling needle 7, implant spring 801, needle withdrawal spring 802, bottom plate 9, bottom plate through hole 901, bottom plate catch 902, rotation stopper 10, first protrusion 1001, second protrusion 309, unlocking spring 20, elastic member 30. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0042] In the description of the present application, the side defined as close to the skin is described as "bottom" or "under"; the side defined as away from the skin is described as "top" or "over". It should be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] An aid needle device, comprising: an implant seat 5; a remaining needle 7; a puncture needle seat 4, the puncture needle seat 4 comprising a puncture needle 6; a bottom plate 9 comprising a bottom plate buckle 902 for fixing the remaining needle 7. The remaining needle 7 is detachably fixed below the implant seat 5; the implant seat 5 is detachably connected with the puncture needle seat 4, wherein the puncture needle seat 4 is coupled with the implant seat 5 when implanting, and the puncture needle seat 4 is decoupled with the implant seat 5 when withdrawing; the puncture needle 6 penetrates through the remaining needle 7. In the aid needle device, the remaining needle is directly fixed by the implant seat, and the implant seat is coupled with the puncture needle seat, which makes the product use the implant spring to push the implant seat to move downwardly, and at the same time, because the implant seat and the puncture needle seat are coupled together, the puncture needle seat and the puncture needle follow the implant seat to move downwardly, and before the implant seat and the puncture needle seat are decoupled, it is ensured that the puncture needle penetrates through the remaining needle, and the puncture needle tip exceeds the remaining needle tip. When the implant seat and the puncture needle seat are decoupled, the puncture needle seat and the puncture needle are pushed by the withdrawal spring to move away from the bottom plate, at this time, if the remaining needle has not been implanted in place, the implant seat can continue to push downwardly until the bottom plate buckle is reliably buckled. Because the puncture needle penetrates through the remaining needle, the puncture needle tip exceeds the remaining needle tip by a distance (at least 1-2 mm), and the distance is sufficient to ensure the implant reliability of the remaining needle being continuously pushed downwardly by the implant seat. The present application can improve the probability of the remaining needle being implanted in place, and has the advantages of stable and reliable use, high implant success rate and the like.

[0044] Figure 1 is a cross-sectional schematic view of an aid needle device according to an example embodiment of the present application, as Figure 1 shown, the aid needle device according to an example embodiment of the present application mainly comprises a safety cap 1, a top shell 2, an outer shell 3, a puncture needle seat 4, an implant seat 5, a puncture needle 6, a remaining needle 7, an implant spring 801, a withdrawal spring 802, a bottom plate 9 and an implant button 510.

[0045] Safety helmet 1 Figure 2A and 2B As shown, it is generally shaped like a cap and is positioned on top of the top shell 2 to provide protection. The top shell 2 is as follows... Figure 3A and 3B As shown, it is generally formed in a disk shape. The outer shell 3 is as follows... Figure 4A and Figure 4B As shown, the overall structure is cylindrical. The top shell 2, outer shell 3, and bottom plate 9 combine to form a receiving cavity. The puncture needle seat 4 is as follows... Figure 5A and Figure 5B As shown, it is formed into a cylindrical shape overall. The implant base 5 is as follows... Figure 6A and Figure 6B As shown, it is generally cylindrical in shape. The puncture needle seat 4, implantation seat 5, puncture needle 6, indwelling needle 7, implantation spring 801, and withdrawal spring 802 are located within the receiving cavity. At least a portion of the implantation button 510 is located within the receiving cavity to trigger the needle implantation action. The puncture needle seat 4 may be located above the implantation seat 5; however, this is only for illustration and not a limitation. The puncture needle seat 4 and implantation seat 5 are detachably connected. During needle implantation, the puncture needle seat 4 is coupled to the implantation seat 5; during needle withdrawal, the puncture needle seat 4 is disengaged from the implantation seat 5. The puncture needle 6 is fixedly connected below the puncture needle seat 4, and the indwelling needle 7 is detachably fixed below the implantation seat 5, with the puncture needle 6 penetrating the indwelling needle 7. The implantation spring 801 is located between the top shell 2 and the implantation seat 5. Before needle implantation, the implantation spring 801 is compressed; during needle implantation, the implantation spring 801 is released and pushes the puncture needle seat 4, implantation seat 5, puncture needle 6, and indwelling needle 7 downwards. The base plate 9 is as follows... Figure 7 As shown, the overall structure is square-shaped. The base plate 9 mainly includes a base plate through hole 901 and a base plate buckle 902. When the needle is inserted to the bottom, the base plate buckle 902 is used to hold the indwelling needle 7. The needle withdrawal spring 802 is located between the implantation seat 5 and the puncture needle seat 4. Before needle withdrawal, the needle withdrawal spring 802 is in a compressed state. When the needle is withdrawn, the needle withdrawal spring 802 is released and used to push the puncture needle seat 4 and the puncture needle 6 upward.

[0046] like Figure 9 As shown, in the needle assist device of this application embodiment, unlike the prior art where "the indwelling needle and the puncture needle seat are coupled", the indwelling needle 7 and the puncture needle seat 4 are decoupled. That is, the indwelling needle 7 is directly fixed by the implantation seat 5, and the puncture needle seat 4 is also coupled to the implantation seat 5. When in use, the implantation spring 801 pushes the implantation seat 5, which in turn pushes the puncture needle seat 4, the puncture needle 6 and the indwelling needle 7 to move downward together. This can increase the probability that the indwelling needle 7 is implanted in place and has the advantages of stable and reliable use and high needle implantation success rate.

[0047] Figure 10 The image shows the coupling between the implantation seat 5 and the puncture needle seat 4, i.e., the state before needle withdrawal.Figure 11 The disengagement of the implant seat 5 from the puncture needle seat 4 is shown, i.e. the state of needle withdrawal is presented. As shown in Figure 10 and Figure 11 , the puncture needle seat 4 comprises a side wing hook 401, the bottom of which has a first inclined surface 4011; the implant seat 5 comprises a side wall clamping hole 501 capable of matching the side wing hook 401; the outer shell 3 comprises a bottom column 301, the top of which has a second inclined surface 3011 matching the first inclined surface 4011; the side wing hook 401 and the side wall clamping hole 501 are used to realize the coupling of the puncture needle seat 4 and the implant seat 5; the bottom column 301 is used to assist the disengagement of the puncture needle seat 4 and the implant seat 5. The specific process of this coupling / disengagement is explained as follows: as shown in Figure 10 , the side wing hook 401 is embedded in the side wall clamping hole 501 to realize the coupling of the puncture needle seat 4 and the implant seat 5. When the needle is implanted, the puncture needle seat 4 and the implant seat 5 remain coupled and move downward together. When the puncture needle seat 4 moves to a position low enough, as shown in Figure 11 , the first inclined surface 4011 at the bottom of the side wing hook 401 and the second inclined surface 3011 at the top of the bottom column 301 come into contact with each other and interact with each other. The interaction specifically means that since the second inclined surface 3011 remains stationary, the first inclined surface 4011 is forced to contract inward and slide downward at the same time. At this time, the side wing hook 401 deforms and comes out of the side wall clamping hole 501 to realize the disengagement of the puncture needle seat 4 and the implant seat 5. Then the puncture needle seat 4 moves upward under the elastic force of the needle withdrawal spring 802, i.e. automatically performs the needle withdrawal action.

[0048] As shown in Figure 1 , Figure 6A and Figure 6B , the implant seat 5 and the implant key 510 can be an integrated structure. Designing the implant seat 5 and the implant key 510 as one component can reduce costs, reduce assembly steps, and improve production efficiency.

[0049] As shown in Figure 1 , Figure 2A and Figure 2B , the safety cap 1 can comprise an inner safety column 101 and an outer safety shell 102. The inner safety column 101 is arranged inside the implant key 510, and the outer safety shell 102 is arranged outside the implant key 510. The inner safety column 101 is used to prevent accidental triggering caused by vibration during product transportation and the like; the outer safety shell 102 is used to prevent accidental triggering caused by unintended accidental pressing of the implant key by the user.

[0050] In the needle helper of the example embodiment of the present application, the outer shell 3 and the bottom plate 9 are coupled or disengaged by relative rotation. Specifically, as shown in Figure 12As shown, the three-point contact mode is adopted to implement the detachable rotary fixation. The needle holder can also include a rotation-stopping structure for preventing the undesired disengagement between the shell 3 and the bottom plate 9. The rotation-stopping structure can be a pin, a buckle or the like structure to realize the switching between the locked non-rotatable state and the unlocked rotatable state.

[0051] In the needle holder of the example embodiment of the present application, the rotation-stopping structure can include a rotation-stopping block 10 which can be formed as a sheet-shaped block with a certain curvature as a whole as shown. Figure 8 The rotation-stopping block 10 is arranged at the side of the shell 3 and above the bottom plate 9. Before the needle implantation, the implantation button 510 contacts the top of the rotation-stopping block 10 to lock the rotation-stopping block 10, and after the needle implantation, the implantation button 510 moves away from the top of the rotation-stopping block 10 to unlock the rotation-stopping block 10. The rotation-stopping structure can also include an unlocking spring 20, the first end of which abuts against the lower surface of the first protrusion 1001 on the rotation-stopping block 10, and the second end of which abuts against the upper surface of the second protrusion 309 on the shell 3. In this example embodiment, the unlocking spring 20 is in the compressed state when the rotation-stopping block 10 is locked, and when the rotation-stopping block 10 is unlocked, the unlocking spring 20 restores to its original shape after being released, thereby pushing the rotation-stopping block 10 to move upward. It should be noted that the unlocking spring 20 is optional and not necessary, and if the unlocking spring 20 is omitted, the rotation-stopping block 10 can also be manually lifted.

[0052] For better understanding of the rotation-stopping structure, it can be understood in combination with Figures 13 to 15 As shown in Figure 13 and Figure 14 Before the needle holder is used, the rotation-stopping block 10 is limited by the implantation button 510 to be in the position close to the bottom plate 9, and the shell 3 is prevented from rotating relative to the bottom plate 9, i.e. the structure above the bottom plate 9 of the needle holder is prevented from being detached from the bottom plate 9. As shown in Figure 15 When the implantation action of the needle holder is completed, the implantation button 510 moves away from the top of the rotation-stopping block 10, and the rotation-stopping block 10 moves away from the bottom plate 9 under the action of the unlocking spring 20, so that the structure above the bottom plate 9 of the needle holder is unlocked from the bottom plate 9, and the shell 3 can rotate relative to the bottom plate 9 (e.g. counterclockwise) to disengage from the bottom plate 9.

[0053] To achieve another implementation method for improving the implantation success rate of the needle holder, on the basis of the existing scheme (i.e. the indwelling needle is fixed with the puncture needle seat), a piece of elastic member 30 is fixed between the indwelling needle 7 and the puncture needle seat 4. The elastic member 30 has a certain hardness and has sufficient supporting force required for the indwelling needle 7 to be clamped into the bottom plate 9, and has a certain deformation amount, so that the needle withdrawal point of the puncture needle seat 4 can be adjusted within a certain range to compensate for the manufacturing errors and mechanical clearances.

[0054] The method for using the needle helper of the example embodiment of the present application is applicable to the needle helper of the example embodiment of the present application, and mainly includes the following steps: pulling the safety cap 1 upward; pressing the implant button 510 inward; and separating the shell 3 from the bottom plate 9. The method has few operation steps and is simple and easy to use. For the convenience of understanding, the method will be described in detail below. Figures 17A to 17I

[0055] First, as shown in Figure 17A and Figure 17B , the safety cap 1 is pulled upward.

[0056] Second, as shown in Figure 17C and Figure 17D , the implant button 510 is pressed inward. After the pressing, the needle helper first automatically performs the implanting action as shown in Figure 17E and the rotation stopping block is unlocked, the needle is implanted to the bottom as shown in Figure 17F , and then the needle is automatically withdrawn as shown in Figure 17G .

[0057] Finally, as shown in Figure 17H and Figure 17I , the shell 3 is separated from the bottom plate 9. If the shell 3 and the bottom plate 9 in the needle helper are detachably connected in a rotating manner, they are relatively rotated to be separated as shown in the figure.

[0058] It should be noted that, as shown in Figures 17A to 17D , the implant seat 5 and the indwelling needle 7 are connected. From the moment shown in Figure 17E , the indwelling needle 7 moves to the lowest position and is fixed by the bottom plate buckle 902. Since the connection between the indwelling needle 7 and the bottom plate buckle 902 is stronger, when the part above the bottom plate 9 is removed as shown in Figure 17H and Figure 17I , the indwelling needle 7 remains in the bottom plate 9, and the implant seat 5 and the indwelling needle 7 are separated.

[0059] The medical device of the example embodiment of the present application can include an insulin pump and the needle helper of the example embodiment of the present application.

[0060] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principles of the present application should be included in the protection scope of the present application.​

Claims

1. A needle-aiding device, comprising: Implant site (5); Indwelling needle (7); Puncture needle seat (4), the puncture needle seat (4) includes a puncture needle (6); The base plate (9) includes a base plate buckle (902) for fixing the indwelling needle (7); Its features are: The indwelling needle (7) is detachably fixed below the implantation seat (5); The implantation seat (5) is detachably connected to the puncture needle seat (4), wherein the puncture needle seat (4) is coupled to the implantation seat (5) when the needle is inserted, and the puncture needle seat (4) is disengaged from the implantation seat (5) when the needle is withdrawn; The puncture needle (6) passes through the indwelling needle (7).

2. The needle-aiding device according to claim 1, characterized in that, Also includes: The safety helmet (1), top shell (2), outer shell (3), implanted spring (801), pin release spring (802), and implanted button (510) are as follows: The safety helmet (1) is located on top of the top shell (2); The top shell (2), the outer shell (3), and the bottom plate (9) are combined to form a receiving cavity; The puncture needle seat (4), the implantation seat (5), the puncture needle (6), the indwelling needle (7), the implantation spring (801), and the needle withdrawal spring (802) are located within the receiving cavity; At least a portion of the implantable button (510) is located within the receiving cavity and is used to trigger the needle implantation action; The implanted spring (801) is located between the top shell (2) and the implantation seat (5). The implanted spring (801) is in a compressed state before the needle is implanted. When the needle is implanted, the implanted spring (801) is released and pushes the puncture needle seat (4), the implantation seat (5), the puncture needle (6) and the indwelling needle (7) downward. The needle withdrawal spring (802) is located between the implantation seat (5) and the puncture needle seat (4). The needle withdrawal spring (802) is in a compressed state before needle withdrawal. When the needle is withdrawn, the needle withdrawal spring (802) is released and pushes the puncture needle seat (4) and the puncture needle (6) upward.

3. The needle-aiding device according to claim 2, characterized in that, The puncture needle hub (4) includes a side wing hook (401), the bottom of which has a first inclined surface (4011). The implant (5) includes a side wall latch (501) that can match the side wing latch (401). The outer casing (3) includes a bottom post (301) with a second slope (3011) at the top that matches the first slope (4011). The side wing hook (401) and the side wall hole (501) are used to couple the puncture needle seat (4) and the implant seat (5); the bottom column (301) is used to assist the puncture needle seat (4) and the implant seat (5) in dissociating.

4. The needle-aiding device according to claim 2, characterized in that, The implant base (5) and the implant button (510) are an integrated structure.

5. The needle-aiding device according to claim 2, characterized in that, The safety helmet (1) includes an inner safety post (101) and an outer safety shell (102). The inner safety post (101) is located inside the implanted button (510), and the outer safety shell (102) is located outside the implanted button (510).

6. The needle-aiding device according to claim 2, characterized in that, The outer shell (3) and the base plate (9) are coupled or disengaged by relative rotation; The needle aid also includes an anti-rotation structure to prevent undesirable separation between the housing (3) and the base plate (9).

7. The needle-aiding device according to claim 6, characterized in that, The anti-rotation structure includes an anti-rotation block (10). Before needle implantation, the implantation button (510) contacts the top of the anti-rotation block (10) to lock the anti-rotation block (10). After needle implantation, the implantation button (510) moves away from the top of the anti-rotation block (10) to unlock the anti-rotation block (10).

8. The needle-aiding device according to claim 7, characterized in that, The anti-rotation structure also includes an unlocking spring (20), the first end of which abuts against the lower surface of the first protrusion (1001) on the anti-rotation block (10), and the second end of which abuts against the upper surface of the second protrusion (309) on the outer shell (3).

9. The needle-aiding device according to claim 1, characterized in that, It also includes an elastic element (30) disposed between the puncture needle seat (4) and the indwelling needle (7).

10. A medical device, characterized in that, Includes an insulin pump and an needle assist device according to any one of claims 1 to 9.

Images