Needle assisting device and detector

Abstract

The invention discloses a needle assisting device and a detector, the needle assisting device is used for the detector, and the detector further comprises a detection assembly. The needle assisting device comprises a shell structure, a triggering piece, a needle assisting piece and a needle retracting piece. The shell structure is provided with a containing cavity. The trigger piece is arranged on the side wall of the shell structure. The triggering piece pushes the needle assisting piece under the action of external force, so that the needle assisting piece is unlocked on the shell structure, and the needle assisting piece can move to a first position towards a cavity opening of the containing cavity relative to the shell structure, and the needle feeding operation is completed; the detection assembly is used for being separated from the needle assisting piece under the action of external force when the needle assisting piece is located at the first position so as to be attached to the skin of a user. When the needle assisting piece moves to the first position, the shell structure abuts against the needle retracting piece, the needle retracting piece is unlocked to the needle assisting piece, the needle retracting piece can move to the second position opposite to the cavity opening of the containing cavity relative to the needle assisting piece, and needle withdrawing operation is completed. According to the needle assisting device in the design, a user can achieve needle feeding operation and needle withdrawing operation by pressing the triggering piece once, and operation is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a needle assist device and a detector. Background Art

[0002] Diabetes is a metabolic disease characterized by high blood sugar levels, which are caused by impaired insulin secretion, impaired insulin action, or both. Diabetics must regularly inject insulin to control their overall condition.

[0003] Currently, due to the structural design of the needle assist device on the market, the operation process of the needle assist device is relatively cumbersome for users (especially the elderly). Therefore, it is necessary to design a needle assist device to improve the convenience of use for users. Summary of the Invention

[0004] The embodiments of the present application provide a needle assist device and a detector, which can solve the problem in the related art that the needle assist device has a relatively cumbersome operation process for users due to its own structural design.

[0005] The embodiment of the present application provides a needle assistant; the needle assistant is used for a detector, the detector also includes a detection component, the needle assistant includes a shell structure, a trigger part, a needle assistant part and a needle retraction part, the shell structure has a accommodating cavity, the trigger part is arranged on the side wall of the shell structure, the needle assistant part is movably connected to the shell structure, the trigger part is suitable for pushing the needle assistant part under the action of an external force, so that the needle assistant part is unlocked from the shell structure, so that the needle assistant part can move relative to the shell structure along the central axis of the shell structure toward the cavity opening of the accommodating cavity to a first position, thereby completing the needle feeding operation, the needle assistant part is used to be detachably connected to the detection component, and the detection component is used to detach from the needle assistant part under the action of an external force when the needle assistant part is in the first position, so as to be attached to the user's skin, the needle retraction part is movably connected to the needle assistant part, and when the needle assistant part moves to the first position, the shell structure pushes the needle retraction part, so that the needle retraction part is unlocked from the needle assistant part, so that the needle retraction part can move relative to the needle assistant part along the central axis of the shell structure back to the cavity opening of the accommodating cavity to a second position, thereby completing the needle withdrawal operation.

[0006] An embodiment of the present application provides a detector; the detector includes a detection component and the above-mentioned needle assisting device, and the detection component and the needle assisting device are detachably connected.

[0007] An embodiment of the present application provides a needle assisting device; the needle assisting device is used in a detector, the detector includes a detection component, the needle assisting device includes a shell structure, a trigger part, a needle assisting part and a needle retracting part, the trigger part is arranged on the side wall of the shell structure and is connected to the needle assisting part through the needle assisting part, the trigger part is suitable for generating displacement and / or deformation in the radial direction of the shell structure under the action of external force, so as to drive the needle assisting part to complete the needle feeding operation and drive the needle retracting part to complete the needle retracting operation, and the needle retracting part is used to be detachably connected to the detection component.

[0008] The needle assist device and detector according to the embodiments of the present application are designed with a trigger member, so that the user can advance and withdraw the needle with a single press of the trigger member, making operation simpler and more convenient. By designing the trigger member on the side wall of the housing structure, the needle assist device is miniaturized by reducing its volume. On the other hand, it is easier for the user to hold the housing structure with one hand while pressing the trigger member with a finger, thereby improving the convenience of single-handed operation of the needle assist device. The user applies a force to the trigger part, which pushes the needle aid part under the action of external force, so that the needle aid part is unlocked from the shell structure, and the needle aid part moves to the first position relative to the shell structure along the central axis of the shell structure toward the cavity opening of the accommodating cavity. At this time, the needle body of the detection component is inserted into the user's injection site with the assistance of the steel needle of the needle aid, and the detection component is attached to the user's skin. While the needle aid part moves to the first position, the shell structure pushes the needle retraction part, so that the needle retraction part is unlocked from the needle aid part, and the needle retraction part moves to the second position relative to the needle aid part along the central axis of the shell structure toward the cavity opening of the accommodating cavity. Then the user pulls out the needle aid with the help of the shell structure in the direction away from the injection site. At this time, since the adhesive force of the adhesive layer is greater than the connecting force between the detection component and the needle aid part, the detection component can be separated from the needle aid part and attached to the user's skin, and the injection can be completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 This is a schematic structural diagram of a needle assist device in one embodiment of the present application;

[0011] Figure 2 This is a schematic structural diagram of the needle assist device in one embodiment of the present application after the end cover is removed;

[0012] Figure 3 Schematic diagram of the cross-sectional structure of the needle assisting device in one embodiment of the present application when the needle assisting member is locked in the housing structure;

[0013] Figure 4 Schematic diagram of the cross-sectional structure of the needle assisting device in one embodiment of the present application when the needle assisting member is in the first position;

[0014] Figure 5 Schematic diagram of the cross-sectional structure of the needle assisting device in one embodiment of the present application when the needle retraction member is in the second position;

[0015] Figure 6 This is a schematic structural diagram of a detection component in one embodiment of the present application;

[0016] Figure 7 This is a schematic diagram of the explosion structure of the needle assist device in one embodiment of the present application;

[0017] Figure 8 for Figure 7 Schematic diagram of the structure from another perspective;

[0018] Figure 9 This is a structural diagram of the needle-assisting member in one embodiment of the present application when locked in the inner shell;

[0019] Figure 10 This is a schematic structural diagram of the needle assist member and the inner shell in one embodiment of the present application from a first viewing angle;

[0020] Figure 11 This is a structural diagram of a steel needle installed on a needle reduction member in one embodiment of the present application;

[0021] Figure 12 This is a schematic structural diagram of the needle assist member and the inner shell in one embodiment of the present application at a second viewing angle;

[0022] Figure 13 This is a schematic structural diagram of the needle assist component and the inner shell in one embodiment of the present application from a third perspective.

[0023] Figure numerals: 1, detector; 10, housing structure; 11, outer shell; 11a, first opening; 12, inner shell; 12a, second opening; 121, first barrel section; 122, second barrel section; 122a, second socket; 123, second guide wall; 123a, guide groove; 124, push protrusion; 125, step structure; 125a, first socket; 20, trigger member; 30, needle-aiding member; 31, first main body; 31a, first surface; 311, bottom wall; 311a, through hole; 312, surrounding wall; 312a, third opening; 313, first Guide wall; 313a, avoidance space; 314, abutment wall; 32, first locking portion; 33, limiting portion; 34, connecting portion; 40, needle reduction member; 41, second main body; 42, second locking portion; 50, detection component; 51, shell; 51a, second surface; 52, adhesive layer; 53, detection member; 61, first elastic member; 62, second elastic member; 70, sealing member; 71, sealing soft glue; 71a, card hole; 80, anti-accidental touch cover; 81, cover body; 82, card bulge; 91, buffer member; 92, end cover; 93, sealing ring; 94, steel needle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0025] Diabetes is a metabolic disease characterized by high blood sugar levels, which are caused by impaired insulin secretion, impaired insulin action, or both. Diabetics must regularly inject insulin to control their overall condition.

[0026] Currently, due to the structural design of the needle assist device on the market, the user needs to continuously rotate the corresponding structural part of the needle assist device to complete the needle insertion operation, or the user needs to continuously push the corresponding structural part of the needle assist device to complete the needle insertion operation. This makes the operation process of the needle assist device more cumbersome for users (especially for the elderly). Therefore, it is necessary to design a needle assist device to improve the convenience of user use.

[0027] To solve the above problems, please refer to Figure 1-Figure 5 As shown, the present application proposes a detector 1 , which includes a needle assist device and a detection component 50 .

[0028] The needle assist device includes a shell structure 10, a trigger member 20, a needle assist member 30 and a needle retracting member 40. The shell structure 10 has a accommodating cavity. The trigger member 20 is arranged on the side wall of the shell structure 10. The needle assist member 30 is movably connected to the shell structure 10; the trigger member 20 is suitable for pushing the needle assist member 30 under the action of an external force, so that the needle assist member 30 is unlocked from the shell structure 10, so that the needle assist member 30 can move relative to the shell structure 10 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity to the first position, thereby completing the needle feeding operation. The needle assist member 30 is used to be detachably connected to the detection component 50, and the detection component 50 is used to detach from the needle assist member 30 under the action of an external force when the needle assist member 30 is in the first position, so as to adhere to the user's skin. The needle retraction member 40 is movably connected to the needle assisting member 30; when the needle assisting member 30 moves to the first position, the shell structure 10 pushes the needle retraction member 40, so that the needle retraction member 40 is unlocked from the needle assisting member 30, so that the needle retraction member 40 can move relative to the needle assisting member 30 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity to the second position, thereby completing the needle withdrawal operation.

[0029] The following combination Figures 1-13 The specific structure of the needle assist device is introduced in detail.

[0030] like Figures 1-6 As shown, the needle assisting device includes a housing structure 10 , a triggering member 20 , a needle assisting member 30 and a needle retracting member 40 .

[0031] The shell structure 10 serves as the shell component of the needle assist device. The shell structure 10 has a receiving cavity. The specific material of the shell structure 10 is not limited here, and designers can make a reasonable selection based on actual needs. For example, the material of the shell structure 10 can be, but is not limited to, plastic, plastic, or silicone. The specific shape of the cavity opening of the receiving cavity is not limited here, and designers can make a reasonable design based on actual needs. For example, the shape of the cavity opening of the receiving cavity can be, but is not limited to, circular or rectangular. The specific structure of the shell structure 10 will be described in detail below.

[0032] The trigger member 20 serves as a trigger switch of the needle assist device. The trigger member 20 can be, but is not limited to, a key, a button, or a switch.

[0033] The trigger member 20 is disposed on the side wall of the housing structure 10. The trigger member 20 is disposed on the side wall of the housing structure 10 and is connected to the needle retracting member 40 through the needle assisting member 30. The trigger member 20 is adapted to generate displacement and / or deformation in the radial direction of the housing structure 10 under the action of an external force, so as to drive the needle assisting member 30 to complete the needle feeding operation, and to drive the needle retracting member 40 to complete the needle retracting operation. For example, when the trigger member 20 is fixedly connected to the side wall of the housing structure 10, the trigger member 20 is adapted to generate elastic deformation. At this time, the trigger member 20 generates elastic deformation under the action of an external force to push the needle assisting member 30. For another example, when the trigger member 20 is movably connected to the side wall of the housing structure 10, the trigger member 20 can slide directly relative to the housing structure 10 along the radial direction of the housing structure 10 under the action of an external force to push the needle assisting member 30.

[0034] The needle assisting member 30 is a structural member in the needle assisting device for performing the needle feeding operation to insert the detection member 53 (such as the detection electrode) of the detection assembly 50 into the user's injection site. The specific structure of the needle assisting member 30 will be introduced in detail below.

[0035] The needle assisting member 30 is movably connected to the housing structure 10 , that is, the position of the needle assisting member 30 relative to the housing structure 10 can be changed.

[0036] The trigger member 20 is adapted to push the needle assisting member 30 under the action of an external force, so that the needle assisting member 30 is unlocked from the shell structure 10, so that the needle assisting member 30 can move relative to the shell structure 10 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity to the first position, thereby completing the needle feeding operation. At this time, the detection member 53 of the detection assembly 50 is inserted into the user's injection site with the assistance of the steel needle 94 of the needle assisting device. It should be noted that before the trigger member 20 is subjected to an external force, the needle assisting member 30 is locked to the shell structure 10, and the position between the needle assisting member 30 and the shell structure 10 remains relatively fixed. It should be noted that the needle tip of the steel needle 94 of the needle assisting device is designed with a cutting edge, which can not only ensure that the steel needle 94 can penetrate the user's skin, but also reduce the pain when the steel needle 94 penetrates the user's skin.

[0037] The needle retracting member 40 is a structural member in the needle assisting device for performing the needle withdrawal operation to pull the steel needle 94 of the needle assisting device out of the user's injection site. The specific structure of the needle assisting member 30 will be introduced in detail below.

[0038] The needle retracting member 40 is movably connected to the needle assisting member 30 , that is, the position of the needle retracting member 40 relative to the needle assisting member 30 can be changed.

[0039] When the needle assisting member 30 moves to the first position, the shell structure 10 pushes against the needle retracting member 40, so that the needle retracting member 40 is unlocked from the needle assisting member 30, so that the needle retracting member 40 can move relative to the needle assisting member 30 along the central axis of the shell structure 10 toward the cavity opening of the accommodating chamber to the second position, thereby completing the needle withdrawal operation. At this time, the steel needle 94 of the needle assisting device will follow the needle retracting member 40 and move along the central axis of the shell structure 10 toward the cavity opening of the accommodating chamber, and the steel needle 94 of the needle assisting device will be pulled out from the user's injection site. It should be noted that before the needle assisting member 30 moves to the first position, the needle retracting member 40 is locked to the needle assisting member 30, and the positions of the needle retracting member 40 and the needle assisting member 30 remain relatively fixed.

[0040] like Figures 1-6 As shown, the detection component 50 serves as the injection structure of the detector 1 , and the specific structure of the detection component 50 will be described in detail below.

[0041] The detection assembly 50 is configured to be detachably connected to the needle assisting member 30. The specific method of detachably connecting the detection assembly 50 and the needle assisting member 30 is not limited herein, and designers may design a suitable method based on actual needs. For example, the detection assembly 50 may be connected to the needle assisting member 30 via at least one of a snap-fit ​​connection and a plug-fit connection, but is not limited thereto.

[0042] When the needle assisting member 30 is in the first position, the detection assembly 50 is used to separate from the needle assisting member 30 under the action of an external force so as to be attached to the user's skin. It should be noted that the detection component 50 includes a shell 51 and an adhesive layer 52. The adhesive layer 52 is arranged on the surface of the shell 51 facing the cavity opening of the accommodating cavity. During the movement of the needle aid 30 relative to the shell structure 10 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity, the detection component 50 detachably connected to the needle aid 30 will follow the needle aid 30 and move along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity until the needle aid 30 moves to the first position. At this time, the detection component 53 of the detection component 50 is inserted into the user's injection site with the assistance of the steel needle 94 of the needle aid, and the adhesive layer 52 is adhered to the user's skin. Then the user pulls out the needle aid in the direction away from the injection site with the help of the shell structure 10. At this time, since the bonding force of the adhesive layer 52 is greater than the connection force between the detection component 50 and the needle aid 30, the detection component 50 can be detached from the needle aid 30 and adhered to the user's skin.

[0043] Based on the needle assist device in the embodiment of the present application, the trigger member 20 is designed so that the user can perform both the needle insertion and withdrawal operations by pressing the trigger member 20 once, making operation simpler and more convenient. By designing the trigger member 20 on the side wall of the housing structure 10, the miniaturization of the needle assist device is achieved by reducing the volume of the trigger member 20. On the other hand, it is easier for the user to hold the housing structure 10 with one hand while pressing the trigger member 20 with a finger, thereby improving the convenience of the user's one-handed operation of the needle assist device. The user applies a force to the trigger member 20, and the trigger member 20 pushes the needle assisting member 30 under the action of external force, so that the needle assisting member 30 is unlocked from the shell structure 10, and the needle assisting member 30 moves relative to the shell structure 10 along the central axis of the shell structure 10 toward the cavity opening of the accommodating chamber to the first position. At this time, the detection member 53 of the detection assembly 50 is inserted into the user's injection site with the assistance of the steel needle 94 of the needle assisting device, and the detection assembly 50 is adhered to the user's skin. At the same time as the needle assisting member 30 moves to the first position, the shell structure 10 pushes the needle retraction member 40, so that the needle retraction member 40 is unlocked from the needle assisting member 30, and the needle retraction member 40 moves relative to the needle assisting member 30 along the central axis of the shell structure 10 away from the cavity opening of the accommodating chamber to the second position. Then the user pulls out the needle assisting device in the direction away from the injection site with the help of the shell structure 10. At this time, since the adhesive force of the adhesive layer 52 is greater than the connection force between the detection assembly 50 and the needle assisting member 30, the detection assembly 50 can be detached from the needle assisting member 30 and adhered to the user's skin, and the injection can be completed.

[0044] like Figure 3-Figure 5 、 Figure 7-Figure 8As shown, the sidewall of the housing structure 10 has an opening, and the trigger member 20 is connected to the sidewall of the housing structure 10 corresponding to the opening. The needle assist member 30 includes a first main body 31 and a first locking portion 32. The first main body 31 is movably connected to the housing structure 10, and the first locking portion 32 is connected to the first main body 31. The first locking portion 32 engages with the opening to lock the needle assist member 30 to the housing structure 10. The trigger member 20 is adapted to push the first locking portion 32 against the opening under the action of an external force, thereby disengaging the first locking portion 32 from the opening, thereby unlocking the needle assist member 30 from the housing structure 10.

[0045] The first locking portion 32 serves as a locking structure for the needle assisting member 30. The first locking portion 32 engages with the opening in the sidewall of the housing structure 10 to lock the needle assisting member 30 to the housing structure 10, thereby achieving relative fixation between the needle assisting member 30 and the housing structure 10. The first locking portion 32 and the first main body 31 can be fixedly connected or removably connected. For example, when the first locking portion 32 and the first main body 31 are fixedly connected, the first locking portion 32 is an L-shaped cantilever. In this case, the long side of the L-shaped cantilever is fixedly connected to the first main body 31, and the short side of the L-shaped cantilever engages with the opening. When the trigger member 20 is subjected to an external force, it pushes against the short side of the L-shaped cantilever, causing the short side of the L-shaped cantilever to squeeze the long side of the L-shaped cantilever, causing the long side of the L-shaped cantilever to elastically deform, and the short side of the L-shaped cantilever to disengage from the opening, thereby unlocking the needle assisting member 30 from the housing structure 10. For another example, when the first locking portion 32 and the first main body portion 31 are movably connected, the first locking portion 32 is a wedge block, and the needle-assisting component 30 also includes a spring. At this time, the wedge block is slidingly connected to the first main body portion 31 (the wedge block can slide radially relative to the first main body portion 31 along the shell structure 10), and the spring is pressed tightly between the wedge block and the first main body portion 31. The wedge block is plugged into the opening, and the trigger member 20 pushes the wedge block under the action of external force. The wedge block squeezes the spring and moves radially along the shell structure 10 until it disengages from the opening, thereby unlocking the needle-assisting component 30 from the shell structure 10.

[0046] By designing the first main portion 31 and the first locking portion 32, the first locking portion 32 engages with the opening in the side wall of the housing structure 10 to lock the needle assisting member 30 to the housing structure 10, thereby achieving a relative fixation between the needle assisting member 30 and the housing structure 10. Under the action of an external force, the trigger member 20 pushes against the first locking portion 32, causing the first locking portion 32 to disengage from the opening in the side wall of the housing structure 10, thereby unlocking the needle assisting member 30 from the housing structure 10. At this time, the needle assisting member 30 can move relative to the housing structure 10 along the central axis of the housing structure 10 toward the cavity opening of the accommodating cavity to the first position, thereby completing the needle delivery operation.

[0047] like Figure 3-Figure 5 、 Figure 7-Figure 8As shown, the housing structure 10 includes an outer shell 11 and an inner shell 12. The sidewall of the outer shell 11 has a first opening 11a, and the trigger member 20 is connected to the sidewall of the outer shell 11 corresponding to the first opening 11a. The inner shell 12 is at least partially located within the cavity of the outer shell 11. The inner shell 12 is fixedly connected to the outer shell 11, and the sidewall of the inner shell 12 has a second opening 12a corresponding to the first opening 11a. The above openings include the first opening 11a and the second opening 12a. The first locking portion 32 engages with the second opening 12a to lock the needle assisting member 30 to the housing structure 10. The trigger member 20 is adapted to push the first locking portion 32 under the action of an external force, so that the first locking portion 32 disengages the second opening 12a, thereby unlocking the needle assisting member 30 from the housing structure 10.

[0048] Among them, the inner shell 12 can be, but is not limited to, a detachable fixed connection with the outer shell 11 by at least one of screw connection, snap connection or plug-in connection, and the inner shell 12 can also be, but is not limited to, a non-detachable fixed connection with the outer shell 11 by gluing, riveting, injection molding or 3D printing.

[0049] By designing the outer shell 11 and the inner shell 12, the outer shell 11 and the inner shell 12 form a double-layer structure, which not only effectively enhances the structural strength of the housing structure 10, but also facilitates the assembly of the needle assisting member 30, the needle retracting member 40, the outer shell 11, and the inner shell 12. The first locking portion 32 engages with the second opening 12a on the side wall of the inner shell 12 to lock the needle assisting member 30 to the housing structure 10, thereby achieving relative fixation between the needle assisting member 30 and the housing structure 10. The trigger member 20 is connected to the side wall of the outer shell 11 corresponding to the first opening 11a. Under the action of an external force, the trigger member 20 pushes the first locking portion 32, causing the first locking portion 32 to disengage from the second opening 12a on the side wall of the inner shell 12, thereby unlocking the needle assisting member 30 from the housing structure 10. At this time, the needle assisting member 30 can move relative to the housing structure 10 along the central axis of the housing structure 10 toward the cavity opening of the accommodating cavity to the first position, thereby completing the needle feeding operation.

[0050] like Figure 3-Figure 5 、 Figure 7-Figure 8As shown, the needle assist device further includes a first elastic member 61, which is tightly pressed between the housing 11 and the first main body 31. When the needle assist member 30 is locked to the housing structure 10, the first elastic member 61 is in a compressed state. When the needle assist member 30 is released from the housing structure 10, the first elastic member 61 recovers its elastic deformation, and the needle assist member 30 moves relative to the housing structure 10 along the central axis of the housing structure 10 toward the cavity opening of the accommodating cavity to a first position under the elastic restoring force of the first elastic member 61. The first elastic member 61 can be a spring or a spring, and is suitable for generating an elastic restoring force along the central axis of the housing structure 10 during the process of recovering its elastic deformation. By designing the first elastic member 61, when the needle assisting member 30 is locked in the shell structure 10, the relative position between the needle assisting member 30 and the shell structure 10 remains fixed. At this time, the first elastic member 61 is pressed tightly between the first main body 31 and the shell 11 and can be maintained in a compressed state. When the needle assisting member 30 is unlocked from the shell structure 10, the relative position between the needle assisting member 30 and the shell structure 10 can change. At this time, the needle assisting member 30 moves relative to the shell structure 10 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity under the action of the elastic restoring force of the first elastic member 61 until the needle assisting member 30 moves to the first position.

[0051] like Figure 9-10As shown, the first main body portion 31 includes a bottom wall 311 , a surrounding wall 312 , a first guide wall 313 and an abutting wall 314 . The bottom wall 311 has a through hole 311a; the surrounding wall 312 is connected to the side of the bottom wall 311 facing away from the cavity opening of the accommodating cavity corresponding to the through hole 311a, and the surrounding wall 312 forms a cavity for accommodating the needle shrinkage part 40, and the needle shrinkage part 40 is movably connected to the surrounding wall 312; the first guide wall 313 is connected to the side of the bottom wall 311 facing away from the cavity opening of the accommodating cavity, and the first guide wall 313 forms an avoidance space 313a, and the first locking portion 32 is an L-shaped cantilever, the long side end of the L-shaped cantilever is connected to the first guide wall 313, and the short side end of the L-shaped cantilever is plugged into the second opening 12a to lock the needle auxiliary part 30 to the shell structure 10; the abutment wall 314 is connected to the side of the bottom wall 311 facing away from the cavity opening of the accommodating cavity, and the first elastic member 61 is pressed tightly between the shell 11 and the abutment wall 314. The bottom wall 311, surrounding wall 312, first guide wall 313, abutment wall 314, and L-shaped cantilever can be formed into an integral structure through, but not limited to, injection molding or 3D printing. The number of first guide walls 313 can be one or more (two or more); in the embodiment of the present application, there are three first guide walls 313, and the three first guide walls 313 are arranged 90 degrees apart around the central axis of the shell structure 10. There are multiple abutment walls 314 to provide stable support for the first elastic member 61; in the embodiment of the present application, there are four abutment walls 314, and the four abutment walls 314 are arranged 90 degrees apart around the central axis of the shell structure 10. Of course, in the embodiment of the present application, the abutment wall 314 is also connected to the surrounding wall 312, so that the abutment wall 314 can also serve as a reinforcing rib to enhance the structural strength of the surrounding wall 312. In this case, the second barrel section 122 has a second socket 122a connected to its cavity, and the second socket 122a is connected to the first socket 125a.

[0052] The inner shell 12 includes a first barrel section 121, a second barrel section 122, a second guide wall 123, and a push-up protrusion 124. The second barrel section 122 is connected to the side of the first barrel section 121 facing away from the cavity opening. The barrel diameter of the second barrel section 122 is smaller than that of the first barrel section 121, forming a step structure 125. The step surface of the step structure 125 adjacent to the second barrel section 122 has a first socket 125a connected to the cavity of the first barrel section 121. The second guide wall 123 is connected to the step surface of the step structure 125. The second guide wall 123 forms a guide groove 123a connected to the cavity of the first barrel section 121. The side of the second guide wall 123 away from the second barrel section 122 has a second opening 12a connected to the guide groove 123a. The push-up protrusion 124 is connected to the inner barrel wall surface of the second barrel section 122 and is located adjacent to the barrel opening of the first barrel section 121. The bottom wall 311 is located within the cavity of the first barrel section 121, the surrounding wall 312 is located within the cavity of the second barrel section 122, the first guide wall 313 is inserted into the guide groove 123a formed by the second guide wall 123, and the abutment wall 314 is inserted into the first insertion opening 125a. When the needle assisting member 30 moves to the first position, the abutment protrusion 124 abuts the needle retracting member 40, thereby unlocking the needle retracting member 40 from the needle assisting member 30. The first barrel section 121, the second barrel section 122, the second guide wall 123, and the abutment protrusion 124 can be formed into an integrated structure by, but not limited to, injection molding or 3D printing. The number of second guide walls 123 can be one or more; in the embodiment of the present application, there are three second guide walls 123, and the three second guide walls 123 are arranged at 90-degree intervals around the central axis of the housing structure 10. Each first guide wall 313 is correspondingly inserted into the guide groove 123a formed by one second guide wall 123. The number of first sockets 125a can be multiple; in the embodiment of the present application, there are four first sockets 125a, and the four first sockets 125a are arranged at 90-degree intervals around the central axis of the housing structure 10. Each abutting wall 314 is correspondingly inserted into one first socket 125a.

[0053] By designing the first guide wall 313 and the second guide wall 123, the first guide wall 313 is disposed within the guide groove 123a formed by the second guide wall 123. Thus, when the needle assisting member 30 moves relative to the housing structure 10 along the central axis of the housing structure 10 toward the opening of the accommodating cavity, the guide groove 123a formed by the second guide wall 123 guides the first guide wall 313, thereby improving the stability of the movement of the needle assisting member 30 relative to the housing structure 10, thereby ensuring the effectiveness of the needle feeding operation. By designing the abutment wall 314, the abutment wall 314 not only provides stable support for the first elastic member 61, but also engages with the first socket 125a. Thus, when the needle assisting member 30 moves relative to the housing structure 10 along the central axis of the housing structure 10 toward the opening of the accommodating cavity, the first socket 125a guides the abutment wall 314, achieving dual guidance and further improving the stability of the movement of the needle assisting member 30 relative to the housing structure 10.

[0054] like Figure 3-Figure 5 、 Figure 7-Figure 8 As shown, the needle assist device further includes a second elastic member 62, which is tightly pressed between the needle assist member 30 and the needle retraction member 40. When the needle retraction member 40 is locked to the needle assist member 30, the second elastic member 62 is in a compressed state. When the needle retraction member 40 is unlocked from the needle assist member 30, the second elastic member 62 recovers its elastic deformation, and the needle retraction member 40 moves relative to the needle assist member 30 along the central axis of the housing structure 10, away from the cavity opening of the accommodating cavity, to a second position under the elastic restoring force of the second elastic member 62. The second elastic member 62 can be a spring or a spring sheet, and is suitable for generating an elastic restoring force along the central axis of the housing structure 10 during the process of recovering its elastic deformation. By designing the second elastic member 62, when the needle retracting member 40 is locked to the needle assisting member 30, the relative position between the needle retracting member 40 and the needle assisting member 30 remains fixed. At this time, the second elastic member 62 is pressed against the needle retracting member 40 and the needle assisting member 30 and can be kept in a compressed state. When the needle retracting member 40 is unlocked from the needle assisting member 30, the relative position between the needle retracting member 40 and the needle assisting member 30 can be changed. At this time, the needle retracting member 40 moves relative to the needle assisting member 30 along the central axis of the shell structure 10 toward the cavity opening of the accommodating cavity under the action of the elastic restoring force of the second elastic member 62 until the needle retracting member 40 moves to the second position.

[0055] like Figures 9-11As shown, the surrounding wall 312 has a third opening 312a. The needle retracting member 40 includes a second main body 41 and a second locking portion 42. The second main body 41 is connected to the needle 94 of the needle assisting device, and the second locking portion 42 is connected to the second main body 41. The second locking portion 42 engages with the third opening 312a to lock the needle retracting member 40 to the needle assisting member 30. When the needle assisting member 30 moves to the first position, the pushing protrusion 124 pushes against the second locking portion 42, disengaging the second locking portion 42 from the third opening 312a, thereby unlocking the needle retracting member 40 from the needle assisting member 30.

[0056] The second locking portion 42 serves as a locking structure for the needle reducing member 40. The second locking portion 42 engages with the third opening 312a of the surrounding wall 312 to lock the needle reducing member 40 to the needle assisting member 30, thereby achieving a relative fixation between the needle reducing member 40 and the needle assisting member 30. The second locking portion 42 and the second main body 41 can be fixedly connected or movably connected. For example, when the second locking portion 42 and the second main body portion 41 are fixedly connected, the second locking portion 42 is another L-shaped cantilever. At this time, the long side end of the other L-shaped cantilever is fixedly connected to the second main body portion 41, and the short side end of the other L-shaped cantilever is plugged into the third opening 312a. When the needle aid 30 moves to the first position, the pushing protrusion 124 pushes the short side end of the other L-shaped cantilever, and the short side of the other L-shaped cantilever squeezes the long side of the other L-shaped cantilever. The long side of the other L-shaped cantilever produces elastic deformation, and the short side end of the other L-shaped cantilever disengages from the third opening 312a, so that the needle reduction component 40 can be unlocked from the needle aid 30. For another example, when the second locking portion 42 and the second main body portion 41 are movably connected, the second locking portion 42 is another wedge block, and the needle reduction component 40 also includes another spring. At this time, the other wedge block is slidably connected to the second main body portion 41 (the other wedge block can slide radially relative to the second main body portion 41 along the shell structure 10), and the other spring is pressed between the other wedge block and the second main body portion 41. The other wedge block is plugged into the third opening 312a. When the needle assist component 30 moves to the first position, the pushing protrusion 124 pushes the other wedge block, and the other wedge block squeezes the other spring and moves radially along the shell structure 10 until it disengages from the third opening 312a, thereby unlocking the needle reduction component 40 from the needle assist component 30.

[0057] By designing the second main portion 41 and the second locking portion 42, the second locking portion 42 engages with the third opening 312a on the surrounding wall 312 to lock the needle retracting member 40 to the needle assisting member 30, thereby achieving relative fixation between the needle retracting member 40 and the needle assisting member 30. When the needle assisting member 30 moves to the first position, the abutting protrusion 124 pushes against the second locking portion 42, causing the second locking portion 42 to disengage from the third opening 312a on the surrounding wall 312, thereby unlocking the needle retracting member 40 from the needle assisting member 30. At this time, the needle retracting member 40 can move relative to the needle assisting member 30 along the central axis of the housing structure 10, away from the cavity opening of the accommodating cavity, to the second position, thereby completing the needle withdrawal operation.

[0058] like Figure 7 、 Figure 8 and Figure 12 As shown, the needle assist device further includes a seal 70, which is used to seal the gap between the trigger 20 and the edge of the corresponding opening on the side wall of the housing structure 10 (specifically, the first opening 11a on the side wall of the housing 11). This effectively seals the trigger 20 against the side wall of the housing structure 10.

[0059] Specifically, the sealing member 70 includes a sealing soft glue 71, and the trigger member 20 is connected to the side wall of the housing structure 10 (specifically, the side wall of the shell 11 mentioned above) through the sealing soft glue 71. By designing the sealing member 70 as the sealing soft glue 71, the sealing soft glue 71 can, on the one hand, achieve an effective seal between the trigger member 20 and the side wall of the housing structure 10, and on the other hand, the sealing soft glue 71 can also position the trigger member 20 on the side wall of the housing structure 10 to achieve the connection between the trigger member 20 and the side wall of the housing structure 10. Of course, in other embodiments, the sealing member 70 can also be an annular sealing ring, which is wound around the periphery of the trigger member 20. In this case, the annular sealing ring can be, but is not limited to, detachably connected to the trigger member 20 (or the side wall of the housing structure 10) by at least one of screw connection, clip connection, or plug connection. The annular sealing ring can also be, but is not limited to, non-detachably connected to the trigger member 20 (the side wall of the housing structure 10) by glue.

[0060] The needle assist device also includes an anti-accidental touch cover 80, which covers the trigger 20 and is detachably connected to at least one of the sealing member 70 and the side wall of the shell structure 10 (specifically, the side wall of the shell 11 mentioned above). The anti-accidental touch cover 80 can be, but is not limited to, detachably connected to the sealing member 70, or detachably connected to the side wall of the shell structure 10, or detachably connected to the sealing member 70 and the side wall of the shell structure 10 by at least one of snap-on, plug-in, magnetic adsorption, etc., or detachably connected to both the sealing member 70 and the side wall of the shell structure 10. By designing the anti-accidental touch cover 80, the anti-accidental touch cover 80 covers the trigger 20 to effectively shield the trigger 20, thereby effectively preventing the trigger 20 from being accidentally triggered, thereby effectively preventing the needle assist device from failing.

[0061] Specifically, the anti-accidental touch cover 80 is detachably connected to the sealing member 70 by snap-fitting, so that the anti-accidental touch cover 80 and the sealing member 70 can be easily installed and removed.

[0062] More specifically, the side of the sealing soft glue 71 facing the anti-accidental touch cover 80 has multiple (more than two) latch holes 71a. The anti-accidental touch cover 80 includes a cover body 81 and multiple latch protrusions 82. The multiple latch protrusions 82 are connected to the side of the cover body 81 facing the sealing soft glue 71, and the multiple latch protrusions 82 are latched in a one-to-one correspondence with the multiple latch holes 71a to position the anti-accidental touch cover 80 on the sealing soft glue 71, so that the anti-accidental touch cover 80 effectively blocks the trigger 20, which can effectively prevent the trigger 20 from being triggered by mistake and causing the needle assist device to fail. Among them, the latch protrusions 82 can be, but are not limited to, formed into an integral structure with the cover body 81 by injection molding or 3D printing. The multiple latch holes 71a can be, but are not limited to, evenly spaced around the circumference of the trigger 20. In this way, the anti-accidental touch cover 80 is evenly stressed when connected to the sealing soft glue 71, which can improve the connection stability between the anti-accidental touch cover 80 and the sealing soft glue 71.

[0063] like Figure 3-Figure 5 、 Figure 7-Figure 8 As shown, the needle assist device further includes a buffer member 91, which is disposed on the barrel end wall of the housing structure 10 and corresponding to the needle retraction member 40. The buffer member 91 is used to cushion the impact force of the needle retraction member 40 during the needle withdrawal operation. It is understandable that during the needle withdrawal operation, the needle retraction member 40 moves relative to the needle assist member 30 along the central axis of the housing structure 10 away from the cavity opening of the accommodating cavity. The needle retraction member 40 is likely to collide with the barrel end wall of the housing structure 10 and produce a large impact sound. By designing the buffer member 91, the needle retraction member 40 directly impacts the buffer member 91, and the buffer member 91 can be used to cushion the impact force of the needle retraction member 40, thereby effectively reducing noise and vibration.

[0064] Specifically, the buffer member 91 includes a buffer pad connected to the barrel end wall of the shell structure 10 (specifically, the barrel end wall of the above-mentioned shell 11). The specific material of the buffer pad can be, but is not limited to, sponge, elastic rubber, or elastic silicone. The buffer pad can be, but is not limited to, being non-detachably connected to the barrel end wall of the shell structure 10 by gluing or riveting. The buffer pad can also be, but is not limited to, being detachably connected to the barrel end wall of the shell structure 10 by at least one of screwing, clamping, or plugging. Of course, in other embodiments, the buffer member 91 can also include a buffer spring or a buffer block, as long as it is a component that can provide a good buffering effect on the needle shrinking member 40.

[0065] like Figure 1-Figure 2 、 Figure 7-Figure 8As shown, the needle-assist device further includes an end cap 92, which is detachably connected to the housing structure 10 to open or close the opening of the receiving chamber. The needle-assist device further includes a sealing ring 93, which is disposed on the end cap 92. When the end cap 92 closes the opening of the receiving chamber, the housing structure 10 squeezes the sealing ring 93 against the end of the receiving chamber where the opening is located. The sealing ring 93 can be detachably connected to the end cap 92 by, but is not limited to, at least one of a screw connection, a snap connection, or a plug-in connection. The sealing ring 93 can also be non-detachably connected to the end cap 92 by, but is not limited to, an adhesive connection. By designing the end cap 92, the end cap 92 covers the opening of the receiving chamber to effectively shield it, effectively protecting the needle 94 of the needle-assist device and the detection assembly 50. By designing the sealing ring 93, the sealing ring 93 can achieve a seal between the opening of the receiving chamber and the end cap 92, providing a waterproof and dustproof effect, thereby protecting the detection element 53 of the detection assembly 50 from external contamination.

[0066] like Figure 3-Figure 5 and Figure 13 As shown, the needle-assisting member 30 further includes a limiting portion 33 and a connecting portion 34. The first main body portion 31 has a first surface 31a facing the cavity opening of the accommodating cavity, and the limiting portion 33 and the connecting portion 34 are both arranged on the first surface 31a. The detection assembly 50 further includes a matching portion (not shown in the figure) and a positioning portion (not shown in the figure). The shell 51 has a second surface 51a facing away from the cavity opening of the accommodating cavity, and the matching portion and the positioning portion are both arranged on the second surface 51a. When the detection assembly 50 is connected to the needle-assisting member 30, the limiting portion 33 is used to cooperate with the matching portion to limit the movement of the shell 51 relative to the first main body portion 31 in a plane perpendicular to the central axis of the shell structure 10, and the connecting portion 34 is used to cooperate with the positioning portion to limit the movement of the shell 51 relative to the first main body portion 31 along the direction of the central axis of the shell structure 10.

[0067] Among them, the limiting portion 33 can be a physical structure such as a limiting protrusion arranged on the first surface 31a of the first main body portion 31, and the matching portion is a virtual structure such as a limiting groove formed on the second surface 51a of the shell 51; the limiting portion 33 can also be a virtual structure such as a limiting groove formed on the first surface 31a of the first main body portion 31, and the matching portion is a physical structure such as a limiting protrusion arranged on the second surface 51a of the shell 51; the limiting protrusion and the limiting groove are plugged into each other to limit the movement of the shell 51 relative to the first main body portion 31 in a plane perpendicular to the central axis of the shell structure 10. The connecting portion 34 can be a physical structure such as a snap fastener provided on the first surface 31a of the first main body portion 31, and in this case, the positioning portion is a virtual structure such as a slot formed on the second surface 51a of the shell 51; the connecting portion 34 can also be a virtual structure such as a slot formed on the first surface 31a of the first main body portion 31, and in this case, the positioning portion is a physical structure such as a snap fastener provided on the second surface 51a of the shell 51; the snap fastener and the slot are engaged to limit the movement of the shell 51 relative to the first main body portion 31 along the direction of the central axis of the shell structure 10.

[0068] By designing the limiting portion 33 to cooperate with the matching portion and the connecting portion 34 to cooperate with the positioning portion, the relative fixation of the position between the shell 51 and the first main body portion 31 can be achieved, thereby achieving a detachable connection between the shell 51 assembly and the needle assisting member 30. The structure is simple and easy to implement.

[0069] The working principle of the detector 1 is introduced below:

[0070] The user removes the end cap 92 and the anti-accidental touch cover 80, aligns the opening of the accommodating cavity with the site to be injected and fits it against the user's skin. The user presses the trigger member 20, which pushes the first locking portion 32 of the needle aid member 30. The first locking portion 32 disengages from the second opening 12a of the inner shell 12. At this time, the needle aid member 30 is unlocked from the shell structure 10. Under the action of the elastic restoring force of the first elastic member 61, the entire needle aid member 30 moves relative to the inner shell 12 along the central axis of the shell structure 10 toward the opening of the accommodating cavity. The detection component 50, which is detachably connected to the needle aid member 30, moves along the central axis of the shell structure 10 toward the opening of the accommodating cavity together with the needle aid member 30 until the needle aid member 30 moves to the first position. At this time, the detection member 53 is inserted into the user's site to be injected with the assistance of the steel needle 94, and the adhesive layer 52 is adhered to the user's skin. When the needle assisting member 30 moves to the first position, the pushing protrusion 124 of the inner shell 12 pushes the second locking portion 42 of the needle retracting member 40 to disengage from the third opening 312a of the surrounding wall 312. At this time, the needle retracting member 40 is unlocked from the needle assisting member 30. Under the action of the elastic restoring force of the second elastic member 62, the entire needle retracting member 40 moves relative to the needle assisting member 30 along the central axis of the shell structure 10, away from the cavity opening of the accommodating chamber, to the second position. The steel needle 94 connected to the needle retracting member 40 will follow the needle retracting member 40 and move along the central axis of the shell structure 10, away from the cavity opening of the accommodating chamber, to disengage from the injection site. The user then grasps the outer shell 11 and pulls out the needle assisting member in a direction away from the injection site. At this time, the adhesive force of the adhesive layer 52 is greater than the connecting force between the detection component 50 and the needle assisting member 30. The detection component 50 is separated from the needle assisting member 30 and adheres to the user's skin, thus completing the entire operation process. It should be noted that the needle assisting device in the embodiment of the present application is a disposable injection device, and the discarded needle assisting device can be discarded after use.

[0071] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0072] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A needle assist device, characterized in that: Used in a detector, the detector also includes a detection component; the needle assist device includes: A shell structure having a receiving cavity; a triggering member, disposed on a side wall of the housing structure; The needle assisting member is movably connected to the housing structure, and the trigger member is adapted to push the needle assisting member under the action of an external force, so that the needle assisting member is unlocked from the housing structure, so that the needle assisting member can move relative to the housing structure along the central axis of the housing structure toward the cavity opening of the accommodating cavity to a first position, thereby completing the needle feeding operation; the needle assisting member is adapted to be detachably connected to the detection assembly, and the detection assembly is adapted to be detached from the needle assisting member under the action of an external force when the needle assisting member is in the first position, so as to be adhered to the user's skin; The needle retraction piece is movably connected to the needle assisting piece. When the needle assisting piece moves to the first position, the shell structure pushes the needle retraction piece, so that the needle retraction piece is unlocked from the needle assisting piece, so that the needle retraction piece can move relative to the needle assisting piece along the central axis of the shell structure away from the cavity opening of the accommodating cavity to the second position, thereby completing the needle withdrawal operation.

2. The needle assist device according to claim 1, wherein: The side wall of the housing structure has an opening, and the trigger member is connected to the side wall of the housing structure corresponding to the opening; The needle assist component includes a first main body and a first locking portion, the first main body is movably connected to the shell structure, the first locking portion is connected to the first main body, and the first locking portion locks the needle assist component to the shell structure by plugging into the opening; the trigger component is suitable for pushing the first locking portion under the action of external force to disengage the first locking portion from the opening, thereby unlocking the needle assist component from the shell structure.

3. The needle assist device according to claim 2, characterized in that: The housing structure includes an outer shell and an inner shell, the side wall of the outer shell having a first opening, the trigger member being connected to the side wall of the outer shell corresponding to the first opening, at least a portion of the inner shell being located within the cavity of the outer shell, the inner shell being fixedly connected to the outer shell, and the side wall of the inner shell having a second opening corresponding to the first opening, the openings including the first opening and the second opening; The first locking portion is plugged into the second opening to lock the needle assisting member to the shell structure, and the trigger member is suitable for pushing the first locking portion under the action of external force to disengage the first locking portion from the second opening, thereby unlocking the needle assisting member from the shell structure.

4. The needle assist device according to claim 3, characterized in that: The needle assist device also includes a first elastic member, which is tightly pressed between the outer shell and the first main body. When the needle assist device is locked in the shell structure, the first elastic member is in a compressed state. When the needle assist device is unlocked from the shell structure, the first elastic member restores its elastic deformation, and under the action of the elastic restoring force of the first elastic member, the needle assist device moves relative to the shell structure along the central axis of the shell structure toward the cavity opening of the accommodating cavity to the first position.

5. The needle assist device according to claim 4, characterized in that: The first main body portion includes a bottom wall, a surrounding wall, a first guide wall and an abutting wall, the bottom wall having a through hole, the surrounding wall corresponding to the through hole being connected to a side of the bottom wall facing away from the cavity opening of the accommodating cavity, the surrounding wall forming a cavity for accommodating the needle shrinkage member, the needle shrinkage member being movably connected to the surrounding wall, the first guide wall being connected to a side of the bottom wall facing away from the cavity opening of the accommodating cavity, the first guide wall forming an avoidance space, the first locking portion being an L-shaped cantilever, the long side end of the L-shaped cantilever being connected to the first guide wall, the short side end of the L-shaped cantilever being plugged into the second opening to lock the needle assist member in the shell structure, the abutting wall being connected to a side of the bottom wall facing away from the cavity opening of the accommodating cavity, and the first elastic member being tightly pressed between the shell and the abutting wall; The inner shell includes a first barrel section, a second barrel section, a second guide wall and a push-up protrusion, the second barrel section is connected to the side of the first barrel section facing away from the cavity opening of the accommodating cavity, the barrel diameter of the second barrel section is smaller than the barrel diameter of the first barrel section to form a step structure, the step surface of the step structure adjacent to the second barrel section has a first socket connected to the cavity of the first barrel section, the second guide wall is connected to the step surface of the step structure, the second guide wall forms a guide groove connected to the cavity of the first barrel section, the second guide wall has a second opening connected to the guide groove on the side away from the second barrel section, the push-up protrusion is connected to the inner barrel wall surface of the second barrel section, and the push-up protrusion is arranged adjacent to the barrel end of the first barrel section; The bottom wall is located in the cavity of the first barrel section, the surrounding wall is located in the cavity of the second barrel section, the first guide wall is inserted into the guide groove formed by the second guide wall, and the abutment wall is inserted into the first socket. When the auxiliary needle part moves to the first position, the pushing protrusion pushes the needle reduction part, so that the needle reduction part is unlocked from the auxiliary needle part.

6. The needle assist device according to claim 1, wherein: The side wall of the housing structure has an opening, and the trigger is connected to the side wall of the housing structure corresponding to the opening; the needle assist device also includes a sealing member, which is used to seal the gap between the trigger and the edge of the side wall of the housing structure corresponding to the opening; the sealing member includes a sealing soft glue, and the trigger is connected to the side wall of the housing structure through the sealing soft glue; The needle aid also includes an anti-accidental touch cover, which covers the trigger component and is detachably connected to the sealing component and at least one of the side walls of the shell structure; the anti-accidental touch cover is detachably connected to the sealing component by snap-fitting; the side of the sealing soft glue facing the anti-accidental touch cover has a plurality of snap holes, and the anti-accidental touch cover includes a cover body and a plurality of snap protrusions, the plurality of snap protrusions are connected to the side of the cover body facing the sealing soft glue, and the plurality of snap protrusions are snap-fitted with the plurality of snap holes in a one-to-one correspondence.

7. The needle assist device according to claim 1, wherein: The needle assist device further comprises a buffer component, which is arranged on the barrel end wall of the shell structure and corresponds to the needle retracting component; the buffer component comprises a buffer pad connected to the barrel end wall of the shell structure.

8. The needle assist device according to claim 1, wherein: The needle assist device further includes an end cover, which is detachably connected to the housing structure to open or close the opening of the accommodating cavity; The needle assist device further includes a sealing ring, which is arranged on the end cover. When the end cover covers the cavity opening of the accommodating cavity, the shell structure squeezes the sealing ring at the end where the cavity opening of the accommodating cavity is located.

9. The needle assist device according to claim 1, wherein: The needle assisting member includes a first main body, a limiting portion, and a connecting portion. The first main body is movably connected to the housing structure. The first main body has a first surface facing the cavity opening of the accommodating cavity. The limiting portion and the connecting portion are both provided on the first surface. The detection assembly includes a housing, a matching portion, and a positioning portion. The housing has a second surface facing away from the cavity opening of the accommodating cavity. The matching portion and the positioning portion are both provided on the second surface. When the detection assembly is connected to the needle assist component, the limiting portion is used to cooperate with the matching portion to limit the movement of the shell relative to the first main body in a plane perpendicular to the central axis of the shell structure, and the connecting portion is used to cooperate with the positioning portion to limit the movement of the shell relative to the first main body along the direction of the central axis of the shell structure.

10. The needle assisting device according to claim 1, wherein: The needle assist device also includes a second elastic member, which is pressed tightly between the needle assist member and the needle retraction member. When the needle retraction member is locked to the needle assist member, the second elastic member is in a compressed state. When the needle retraction member is unlocked from the needle assist member, the second elastic member restores its elastic deformation, and under the action of the elastic restoring force of the second elastic member, the needle retraction member moves relative to the needle assist member along the central axis of the shell structure toward the cavity opening of the accommodating cavity to the second position.

11. A detector, characterized in that: include: Detection components; The needle assist device according to any one of claims 1 to 10, wherein the detection assembly is detachably connected to the needle assist member.

12. A needle assist device, characterized in that: Used in a detector, the detector includes a detection component; the needle assisting device includes a shell structure, a triggering member, a needle assisting member and a needle retracting member, the triggering member is arranged on the side wall of the shell structure and is connected to the needle assisting member through the needle assisting member, the triggering member is suitable for generating displacement and / or deformation in the radial direction along the shell structure under the action of external force, so as to drive the needle assisting member to complete the needle feeding operation and drive the needle retracting member to complete the needle retracting operation, and the needle retracting member is used to be detachably connected to the detection component.

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