Needle assisting device

Abstract

The utility model relates to the technical field of medical equipment, in particular to a needle assisting device. The needle assisting device comprises a shell assembly, a needle assisting assembly, a driving mechanism and a locking structure, the shell assembly comprises a shell, the shell is provided with a cavity, and the needle assisting assembly is used for clamping a puncture needle head to move between a puncture position and an energy storage position of the cavity, so that the needle assisting assembly obtains needle assisting potential energy at the energy storage position; and needle assisting potential energy is released at the puncture position to puncture the puncture needle into the subcutaneous part of the patient. The locking structure is arranged on the surface of the shell, the locking structure is used for locking the needle assisting assembly to the energy storage position, the driving mechanism is used for driving the needle assisting assembly to the puncture position from the energy storage position when the locking structure is unlocked, and an abutting plate extends from the end of the shell and is used for making contact with the skin of a patient to adjust the puncture angle of the puncture needle head. The needle assisting device has the advantages that the abutting plate facilitates angle adjustment of the needle assisting device, the locking structure can prevent the needle assisting device from being touched by mistake, and the needle assisting device is arranged on the shell to facilitate operation of a user.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a needle assisting device. Background Art

[0002] Diabetic patients need to take insulin injections regularly, and traditional insulin injections are usually injected subcutaneously. Each insulin injection requires acupuncture, which brings great inconvenience to diabetic patients.

[0003] Therefore, in order to facilitate multiple insulin injections per day for diabetic patients, an infusion channel between the subcutaneous tissue and the drug needs to be established on the diabetic patient's body, generally by implanting an infusion needle on the patient's body. However, due to the variety of body shapes of patients, different body shapes of patients (such as obesity) are suitable for different implantation angles, and the current implantation process of the puncture needle is generally manual, which is not very stable and the insertion angle is difficult to control. Utility Model Content

[0004] Based on this, the utility model provides a needle assisting device to solve the above technical problems.

[0005] A needle-assisting device, which is used to insert a puncture needle under the skin of a patient, and the needle-assisting device comprises: a shell assembly, which comprises an outer shell, and the outer shell has a chamber; a needle-assisting assembly, which is used to clamp the puncture needle and move it between a puncture position and an energy storage position in the chamber, so that the needle-assisting assembly can obtain needle-assisting potential energy at the energy storage position, and release the needle-assisting potential energy at the puncture position to insert the puncture needle under the skin of the patient; a locking structure, which is arranged on the surface of the outer shell, and is used to lock the needle-assisting assembly to the energy storage position; a driving mechanism, which is used to drive the needle-assisting assembly from the energy storage position to the puncture position when the locking structure is unlocked; an abutment plate extends from the end of the outer shell, and the abutment plate is used to contact the patient's skin to adjust the insertion angle of the puncture needle.

[0006] In this arrangement, the driving mechanism drives the needle-assisting assembly to extend, and when the needle-assisting assembly extends, the puncture needle is implanted under the patient's skin. Therefore, during the implantation process, the needle-assisting device first abuts against the human skin through the abutment plate, and then the needle-assisting device is driven by the driving mechanism to pierce the puncture needle under the patient's skin. Therefore, the abutment plate can facilitate the angle adjustment of the needle-assisting device relative to the patient's skin. The locking structure is arranged on the surface of the shell, which is convenient for the user to operate it, and the state of the locking structure can be intuitively observed.

[0007] In one embodiment, the locking structure includes a trigger unit which has a locking position and an unlocking position. The trigger unit is configured to be movable between the locking position and the unlocking position in response to an external force. When the trigger unit is in the locking position, it abuts against the needle assisting assembly, and when the trigger unit is in the unlocking position, it disengages from the needle assisting assembly.

[0008] In one embodiment, the driving mechanism includes a first elastic member. The needle assisting assembly includes a driving rod which is located in the chamber. One end of the first elastic member abuts against the driving rod, and the other end abuts against the housing assembly.

[0009] In one embodiment, the housing assembly includes a locking seat and an unlocking switch. The locking seat is connected to one end of the outer shell away from the needle assisting assembly, and a first clamping block protrudes from the inner wall of the locking seat. A second clamping block is provided on the outer peripheral side of one end of the driving rod close to the locking seat. The outer diameter of the second clamping block is larger than the inner diameter of the first clamping block, so that the first clamping block and the second clamping block are in clamping engagement. An opening is provided on the locking seat, and the unlocking switch is arranged in the opening and can move along the axial direction of the locking seat. As the unlocking switch moves towards the driving rod, the unlocking switch can abut against the second clamping block and make it move in the radially inward direction to release the locking between the first clamping block and the second clamping block.

[0010] In one embodiment, an abutting flange protrudes from the outer peripheral side of the unlocking switch. A first inclined surface is provided on the side of the abutting flange facing the driving rod, and a second inclined surface is provided on the outer peripheral side of the second clamping block. The first inclined surface and the second inclined surface are inclined in the same direction.

[0011] In one embodiment, a straight groove is provided on the outer shell, and a rotating groove is provided on the unlocking switch. The rotating groove includes a first section and a second section which are communicated. The first section is arranged parallel to the straight groove, and the second section is arranged at an angle with the first section. The housing assembly further includes a locking column which passes through the straight groove and the rotating groove. As the locking column moves from one end to the other end in the straight groove, the locking column also moves from the first section to the second section to drive the unlocking switch to rotate from a first position to a second position. A step is provided on the side wall of the unlocking switch. When the unlocking switch is in the second position, the step abuts against the first clamping block to stop the axial movement of the unlocking switch. When the unlocking switch is in the first position, the step disengages from the first clamping block.

[0012] In one embodiment, a trigger groove is provided on the shell, and the drive rod includes a main rod and a trigger button, the trigger button is elastically connected to the main rod and partially extends out of the trigger groove, the trigger button abuts against the groove wall of the trigger groove and stops the movement of the drive rod to drive the auxiliary needle assembly to extend out of the chamber, and the trigger button is configured to be able to release the abutment with the groove wall of the trigger groove in response to movement toward the main rod.

[0013] In one embodiment, the auxiliary needle assembly also includes a safety lock catch, a toggle groove is provided on the side of the shell facing away from the trigger groove, the safety lock catch is rotatably connected to the main rod, and a portion of the safety lock catch extends out of the toggle groove; the safety lock catch can switch the trigger unit between a locked position and an unlocked position by rotating relative to the main rod, when the trigger unit is in the locked position, one end of the safety lock catch abuts against the trigger button and stops the trigger button from moving toward the main rod, and when the trigger unit is in the unlocked position, the safety lock catch and the trigger button are spaced apart from each other.

[0014] In one embodiment, the auxiliary needle assembly also includes a safety lock catch, a toggle groove is provided on the side of the shell facing away from the trigger groove, the safety lock catch is rotatably connected to the main rod, and a portion of the safety lock catch extends out of the toggle groove; the safety lock catch has a locked state and an unlocked state, and can switch between the locked state and the unlocked state by rotating relative to the main rod, when the safety lock catch is in the locked state, one end of the safety lock catch abuts against the trigger button and stops the movement of the trigger button toward the main rod, and when the safety lock catch is in the unlocked state, the safety lock catch and the trigger button are spaced apart from each other.

[0015] In one embodiment, the needle-assisting assembly further includes a clamping unit and a puncture needle, wherein the puncture needle is detachably installed in the clamping unit, and the clamping unit is connected to the driving rod.

[0016] In one embodiment, the clamping unit includes a clamping block and a second elastic member, the clamping block is rotatably connected to the driving rod, and the second elastic member is located on one side of the connection point between the clamping block and the driving rod, one end of the second elastic member abuts against the clamping block, and the other end abuts against the driving rod, and the puncture needle is installed on the other side of the connection point between the clamping block and the driving rod.

[0017] In one embodiment, the abutment plate is arranged obliquely relative to the axis of the shell assembly, and the abutment plate has an abutment surface for abutting against human skin, and at least a part of the abutment surface is a curved surface structure.

[0018] In one embodiment, the abutment plate is inclined toward the axial direction of the shell, and an avoidance groove is provided on the abutment plate, and at least part of the auxiliary needle assembly extends through the avoidance groove to the side of the abutment plate facing away from the shell assembly; the avoidance groove is provided in the middle of the abutment plate and forms a first abutment section and a second abutment section that are spaced apart, and the first abutment section and the second abutment section are symmetrically arranged relative to the center line of the abutment plate.

[0019] Compared with the prior art, the present invention sets an abutment block at the front end of the needle-assisting device that can abut against the patient's skin. With the aid of the inclined abutment block and the abutment surface on the abutment block that is set in an arc shape, the needle-assisting assembly and the skin can be stably set at an angle, which is convenient for the needle-assisting assembly to be inserted at an angle inclined to the skin, and for the needle-assisting device to adjust the angle. A locking structure is also set to prevent accidental touch of the trigger switch, which can ensure that the needle-assisting device will not accidentally touch the extended needle-assisting assembly and cause a medical accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a needle-assisting device according to one embodiment of the present invention, in which the needle-assisting component is in an extended state;

[0021] Figure 2 A structural cross-sectional view of a needle assisting device according to one embodiment of the present invention, in which the needle assisting assembly is in an extended state;

[0022] Figure 3 A schematic structural diagram of a needle-assisting assembly of one embodiment of the needle-assisting device provided by the utility model in a retracted state;

[0023] Figure 4 This is a structural schematic diagram of one embodiment of the needle-assisting device provided by the utility model, in which the needle-assisting assembly is in a retracted state and a patch is installed;

[0024] Figure 5 A partial structural schematic diagram of one embodiment of the locking seat and the unlocking switch provided by the utility model;

[0025] Figure 6 A partial structural schematic diagram of one embodiment of the locking seat provided by the utility model;

[0026] Figure 7 A partial structural schematic diagram of the needle assisting device provided by the utility model when the unlocking switch is in the first position;

[0027] Figure 8 A partial structural schematic diagram of the needle assisting device provided by the utility model when the unlocking switch is in the second position;

[0028] Figure 9A structural cross-sectional view of a safety lock in another embodiment of the needle assisting device provided by the utility model in a locked state;

[0029] Figure 10 A structural cross-sectional view of a safety lock in another embodiment of the needle assisting device provided by the utility model in an unlocked state;

[0030] Figure 11 This is a partial structural schematic diagram of another embodiment of the needle assisting device provided by the utility model.

[0031] The symbols in the figure mean the following:

[0032] 100, needle assist device; 10, housing assembly; 11, housing; 111, chamber; 112, straight groove; 113, trigger groove; 114, toggle groove; 12, abutment plate; 121, abutment surface; 122, avoidance groove; 123, first abutment section; 124, second abutment section; 13, locking seat; 131, first clamping block; 132, opening; 14, unlocking switch; 141, abutment flange; 1411, first inclined surface; 142, rotation groove; 1421, first section; 1 422. Second section; 143. Step; 15. Locking column; 20. Needle-assisting assembly; 21. Clamping unit; 211. Clamping block; 2111. Clamping protrusion; 212. Second elastic member; 22. Puncture needle; 30. Driving mechanism; 31. First elastic member; 32. Driving rod; 321. Second clamping block; 3211. Second inclined surface; 322. Main rod; 323. Trigger button; 3231. Movable groove; 33. Safety lock; 34. Hook structure; 40. Applicator. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature or in indirect contact with the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, when the first feature is "above", "over" or "on top of" the second feature, it may be directly above or obliquely above the second feature, or merely indicate that the first feature has a higher horizontal height than the second feature. When the first feature is "under", "beneath" or "underneath" the second feature, it may be directly below or obliquely below the second feature, or merely indicate that the first feature has a lower horizontal height than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meaning as commonly understood by those skilled in the technical field to which this application pertains. The terms used in the description of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0038] The present utility model provides a needle assisting device 100 for implanting a puncture needle 22 into patients such as diabetic patients who need to implant a subcutaneous liquid infusion device (such as an indwelling needle), and can abut against the human skin to control the insertion angle of the puncture needle 22.

[0039] Please refer to Figures 1-4 , the needle assisting device 100 includes a housing assembly 10, a needle assisting assembly 20, a driving mechanism 30 and a locking structure. The housing assembly 10 includes a housing 11 which has a chamber 111. The needle assisting assembly 20 is used for clamping the puncture needle 22 to move between the puncture position and the energy storage position in the chamber 111, so that the needle assisting assembly 20 obtains needle assisting potential energy at the energy storage position and releases the needle assisting potential energy at the puncture position to pierce the puncture needle 22 into the patient's subcutaneous tissue. The locking structure is arranged on the surface of the housing 11 and is used for locking the needle assisting assembly 20 to the energy storage position. The driving mechanism 30 is used for driving the needle assisting assembly 20 from the energy storage position to the puncture position when the locking structure is unlocked. An abutting plate 12 extends from the end of the housing 11, and the abutting plate 12 is used for contacting the patient's skin to adjust the insertion angle of the puncture needle 22.

[0040] In this way, the driving mechanism 30 drives the needle-assisting assembly 20 to extend, and the needle-assisting assembly 20 extends to implant the puncture needle 22 into the patient's subcutaneous tissue. Therefore, during the implantation process, the needle-assisting device 100 first abuts against the human skin through the abutment plate 12, and then drives the needle-assisting assembly 20 through the driving mechanism 30 to pierce the puncture needle 22 into the patient's subcutaneous tissue. Therefore, the abutment plate 12 can facilitate the angle adjustment of the needle-assisting device 100 relative to the patient's skin. The locking structure is arranged on the surface of the housing 11, which is convenient for the user to operate it, and the state of the locking structure can be intuitively observed.

[0041] Specifically, the abutment plate 12 is tilted relative to the axis of the housing assembly 10, and the abutment plate 12 has an abutment surface 121 for abutting against human skin, and at least part of the abutment surface 121 is a curved surface structure. The auxiliary needle assembly 20 is installed at one end of the housing assembly 10 and partially accommodated in the chamber 111. The drive mechanism 30 is installed in the chamber 111 and connected to the auxiliary needle assembly 20, and can drive the auxiliary needle assembly 20 to extend or retract along the axial direction of the housing assembly 10.

[0042] Since the abutment plate 12 is tilted relative to the axis of the shell assembly 10, and the extension and retraction direction of the auxiliary needle assembly 20 is the axial direction of the shell assembly 10, after the abutment plate 12 is in contact with the skin (that is, the abutment plate 12 is parallel to the skin it abuts), the auxiliary needle assembly 20 is set at an angle to the skin, so the auxiliary needle assembly 20 can be inserted into the subcutaneous tissue at an angle inclined to the skin, and since the abutment surface 121 is an arc surface structure, it is also convenient for the operator to adjust the angle through the arc-shaped abutment surface 121. During the adjustment process, the abutment surface 121 always fits the skin, so its angle adjustment is also more stable.

[0043] Furthermore, the abutment plate 12 is inclined toward the axial direction of the housing, and an avoidance groove 122 is provided on the abutment plate 12, and at least part of the auxiliary needle assembly 20 extends to the side of the abutment plate 12 facing away from the housing assembly 10 through the avoidance groove 122. In this way, the abutment plate 12 will not interfere with the extension of the auxiliary needle assembly 20, and the abutment plate 12 and the auxiliary needle assembly 20 can be used at the same time.

[0044] Of course, in other embodiments, the abutment plate 12 may not avoid the auxiliary needle assembly 20 by providing the avoidance groove 122, but may be directly set on one lateral side of the auxiliary needle assembly 20, which can also ensure the simultaneous use of the abutment plate 12 and the auxiliary needle assembly 20.

[0045] In this embodiment, the avoidance groove 122 is formed in the middle of the abutting plate 12 and forms a first abutting section 123 and a second abutting section 124 which are arranged at intervals. The first abutting section 123 and the second abutting section 124 are symmetrically arranged with respect to the midline of the abutting plate 12. In this way, the avoidance groove 122 is formed in the middle of the abutting plate 12. Therefore, the needle assisting assembly 20 can extend from the middle position of the avoidance groove 122, so as to ensure that when the abutting plate 12 is in use, the forces on both sides are balanced, and to avoid the inclination of the piercing direction of the needle assisting assembly 20 after the force is offset.

[0046] Furthermore, the groove wall of the avoidance groove 122 is arranged in a circular arc structure with continuous curvature. In this way, when the abutting plate 12 abuts against the patient's skin, the abutting effect is more stable, the patient's skin can be stressed more evenly, the patient's experience is better, and the foreign body sensation is reduced.

[0047] The locking structure includes a trigger unit. The trigger unit has a locking position and an unlocking position. The trigger unit is configured to be able to move between the locking position and the unlocking position in response to an external force, and when the trigger unit is in the locking position, it abuts against the needle assisting assembly 20, and when the trigger unit is in the unlocking position, it disengages from the needle assisting assembly 20. In this way, when the trigger unit abuts against the needle assisting assembly 20, it can stop the needle assisting assembly 20 from extending along the axial direction of the outer shell 11, that is, prevent the needle assisting assembly 20 from driving the piercing needle 22 to extend. Therefore, when the trigger unit is in the locking position, it means that the locking structure locks the needle assisting assembly 20 in the energy storage position. On the contrary, when the trigger unit disengages from the needle assisting assembly 20, there is no abutting and blocking effect, and the needle assisting assembly 20 can freely extend in response to the driving of the driving mechanism 30, so as to realize the piercing action of the piercing needle 22.

[0048] The driving mechanism 30 includes a first elastic member 31. The needle assisting assembly 20 includes a driving rod 32. The driving rod 32 is located in the chamber 111. One end of the first elastic member 31 abuts against the driving rod 32, and the other end abuts against the housing assembly 10. In this way, when the driving rod 32 retracts along the axis of the accommodating cavity, the first elastic member 31 can be compressed, so that the first elastic member 31 accumulates elastic potential energy. When the first elastic member 31 can return to its initial length, it can convert the elastic potential energy into the power of the driving rod 32, so as to drive the driving rod 32 to drive the needle assisting assembly 20 to extend into the patient's skin.

[0049] In this embodiment, the first elastic member 31 is a spring. In other embodiments, the first elastic member 31 can also be made of elastic rubber or other materials.

[0050] As can be seen from the above, the first elastic member 31 has an extended state and a retracted state. In order to keep the first elastic member 31 in a compressed state, the housing assembly 10 includes a locking seat 13 and an unlocking switch 14. The locking seat 13 is connected to one end of the outer shell 11 away from the needle assisting assembly 20, and a first clamping block 131 protrudes from the inner wall of the locking seat 13. A second clamping block 321 is provided on the outer peripheral side of one end of the driving rod 32 close to the locking seat 13. The outer diameter of the second clamping block 321 is larger than the inner diameter of the first clamping block 131, so that the first clamping block 131 and the second clamping block 321 are clamped and matched. Therefore, through the limiting cooperation between the first clamping block 131 and the second clamping block 321, the driving rod 32 can be limited through the locking seat 13. When there is no axial displacement of the driving rod 32, the first elastic member 31 can be kept in a compressed state.

[0051] Furthermore, in order for the first elastic member 31 to be freely released, an opening 132 is formed in the locking seat 13, and the unlocking switch 14 is arranged in the opening 132 and can move along the axial direction of the locking seat 13. As the unlocking switch 14 moves towards the driving rod 32, the unlocking switch 14 can abut against the second clamping block 321 and make it move in the radially inward direction to release the locking between the first clamping block 131 and the second clamping block 321. That is to say, the unlocking switch 14 is a button that can move axially. When the needle assisting device 100 needs to pierce the needle assisting assembly 20 into the patient's skin, press the unlocking switch 14 to make the unlocking switch 14 move towards the needle assisting assembly 20, abut against the second clamping block 321, and make the second clamping block 321 deform inward until it disengages from the abutment with the first clamping block 131. Once the abutment between the first clamping block 131 and the second clamping block 321 is released, the elastic force of the first elastic member 31 is released, thereby pushing the driving rod 32 to drive the needle assisting assembly 20 to quickly extend and pierce into the patient's skin to complete the implantation of the puncture needle 22.

[0052] In this embodiment, a plurality of second clamping blocks 321 are arranged at the end of the driving rod 32, and the plurality of second clamping blocks 321 are arranged along the circumferential direction of the driving rod 32. Each second clamping block 321 can be clamped with a first clamping block 131 to ensure a more stable clamping effect.

[0053] Preferably, the end of the driving rod 32 close to the locking seat 13 is circumferentially divided into a plurality of claw structures 34. The end of the claw structure 34 protrudes radially outward to form the above-mentioned second clamping block 321. Since the plurality of claw structures 34 are thinner than the driving rod 32, their structural strength is lower and they are prone to deformation. Therefore, when the unlocking switch 14 abuts against the second clamping block 321 on the claw structure 34, each claw structure 34 deforms radially inward, thereby completing the unlocking action with the first clamping block 131.

[0054] Abutment grooves are formed between the plurality of hook structures 34, and a portion of the first elastic member 31 is disposed in the abutment grooves, and one end of the first elastic member 31 abuts against the bottom of the abutment groove, and the other end abuts against the housing assembly 10. In this way, the outer peripheral wall of the first elastic member 31 can be limited by each hook structure 34, reducing the shaking of the first elastic member 31, and preventing the first elastic member 31 from falling out and being misplaced, ensuring that the first elastic member 31 is always located between the driving rod 32 and the housing assembly 10 and plays a stable elastic role.

[0055] Furthermore, an abutting flange 141 is convexly provided on the outer circumference of the unlocking switch 14, a first inclined surface 1411 is provided on the side of the abutting flange 141 facing the driving rod 32, a second inclined surface 3211 is provided on the outer circumference of the second clamping block 321, and the first inclined surface 1411 and the second inclined surface 3211 are inclined in the same direction. In this way, since the first clamping block 131 and the second clamping block 321 are abutted by two mutually adapted inclined surfaces, the inclined surfaces can convert the axial movement into a radial component force, thereby facilitating the mutual separation between the first clamping block 131 and the second clamping block 321.

[0056] In this embodiment, the first inclined surface 1411 and the second inclined surface 3211 are both configured as inclined straight surfaces. In other embodiments, they may also be configured as arc surfaces abutting against each other, which can also achieve the same technical effect.

[0057] In addition, in order to prevent the problem of accidental unlocking between the first clamping block 131 and the second clamping block 321 due to the accidental touching of the unlocking switch 14, another embodiment is provided:

[0058] See also Figures 5-8 In this embodiment, a straight groove 112 is further provided on the housing 11, and a rotating groove 142 is provided on the unlocking switch 14. The rotating groove 142 includes a first section 1421 and a second section 1422 that are connected. The first section 1421 is arranged parallel to the straight groove 112, and the second section 1422 is arranged at an angle to the first section 1421. The housing assembly 10 includes a locking column 15. The locking column 15 is penetrated in the straight groove 112 and the rotating groove 142. As the locking column 15 moves from one end of the straight groove 112 to the other end, the locking column 15 also moves from the first section 1421 to the second section 1422 to drive the unlocking switch 14 to rotate from the first position to the second position. Since the opening path of the straight groove 112 is a straight line, the locking column 15 moves along a straight line in the straight groove 112, and the first section 1421 and the second section 1422 are set at an angle. Therefore, as the locking column 15 moves in a straight line, when it needs to enter the second section 1422, the unlocking switch 14 will rotate in response to the movement of the locking column 15, otherwise interference will occur. That is to say, the movement of the locking column 15 in the straight groove 112 can drive the unlocking switch 14 to rotate circumferentially around the axis of the housing 11.

[0059] Specifically, in this embodiment, the straight groove 112 is arranged parallel to the axis of the outer shell 11. The first section 1421 is parallel to the axis of the outer shell 11, and the second section 1422 is arranged at an angle to the axis of the outer shell 11.

[0060] A step 143 is provided on the side wall of the unlocking switch 14. When the unlocking switch 14 is in the second position, the step 143 abuts against the first clamping block 131 to stop the axial movement of the unlocking switch 14. That is, the movement of the unlocking switch 14 towards the driving rod 32 will be limited and stopped due to the abutment of the step 143 and the first clamping block 131. Therefore, when the unlocking switch 14 is in the second position, it cannot be accidentally pressed, and at this time, the unlocking switch 14 is locked. On the contrary, when the unlocking switch 14 is in the first position, the step 143 is disengaged from the first clamping block 131. At this time, the unlocking switch 14 is unlocked and can freely move axially along the outer shell 11 towards the driving rod 32, so as to abut against the driving rod 32 and disengage the first clamping block 131 and the second clamping block 321.

[0061] Preferably, a plurality of steps 143 are provided on the side wall of the unlocking switch 14, and when the unlocking switch 14 is in the second position, all the plurality of steps 143 can abut against the first clamping block 131 to improve the locking effect of the locking column 15 on the unlocking switch 14.

[0062] Please refer to Figures 9-11 , the present utility model also provides another anti-misoperation scheme, which is elaborated in detail here.

[0063] In this embodiment, the straight groove 112 is no longer provided on the outer shell 11, and the unlocking switch 14 does not have a rotating groove 142. Instead, a trigger groove 113 is provided on the outer shell 11. The driving rod 32 is provided as a main rod 322 and a trigger button 323. The trigger button 323 is elastically connected to the main rod 322 and partially extends out of the trigger groove 113, and an operator can operate the trigger button 323 on the outside of the outer shell 11.

[0064] The trigger button 323 abuts against the groove wall of the trigger groove 113 and stops the movement of the driving rod 32 to drive the needle assisting assembly 20 to extend out of the chamber 111. And the trigger button 323 is configured to be able to release the abutment with the groove wall of the trigger groove 113 in response to the movement towards the main rod 322. That is to say, when the operator presses the trigger button 323 along the pressing direction from the outside to the inside, and the trigger button 323 moves in the radially inward direction through deformation, the trigger button 323 no longer abuts against the groove wall of the trigger groove 113 axially, and its abutment with the groove wall of the trigger groove 113 is released. At this time, the main rod 322 can drive the needle assisting assembly 20 to extend out of the chamber 111 and pop out in response to the elastic force of the first elastic member 31.

[0065] Preferably, in order to prevent the trigger button 323 from being accidentally touched, the drive mechanism 30 also includes a safety lock catch 33. A toggle slot 114 is provided on the side of the housing 11 facing away from the trigger slot 113. The safety lock catch 33 is rotatably connected to the main rod 322, and a portion of the safety lock catch 33 extends out of the toggle slot 114. The safety lock catch 33 has a locked state and an unlocked state, and can switch between the locked state and the unlocked state by rotating relative to the main rod 322. When the safety lock catch 33 is in the locked state, one end of the safety lock catch 33 abuts against the trigger button 323 and stops the trigger button 323 from moving toward the main rod 322. When the safety lock catch 33 is in the unlocked state, the safety lock catch 33 and the trigger button 323 are spaced apart from each other.

[0066] In this way, since part of the safety lock catch 33 extends out of the toggle slot 114, it is convenient for the operator to toggle the safety lock catch 33 inside the housing 11, so that the safety lock catch 33 rotates relative to the main rod 322 and switches between the locked state and the unlocked state. When the safety lock catch 33 is in the locked state, since the safety lock catch 33 is rotationally connected to the main rod 322, it cannot produce an overall displacement, but can only produce a rotation. One end of the safety lock catch 33 in the locked state abuts against the housing 11, and the other end abuts against the trigger button 323 to stop the radial inward movement of the trigger button 323, thereby preventing the failure of the stop between the trigger button 323 and the housing 11. When the safety lock catch 33 is in the unlocked state, it can rotate freely, so the trigger button 323 can also be pressed freely.

[0067] Specifically, in this embodiment, the end of the trigger button 323 away from the main rod 322 (that is, the end that can extend out of the housing 11) is bent to form a movable groove 3231, and the notch of the movable groove 3231 faces the axis direction of the main rod 322. When the safety lock 33 is in the unlocked state, one end of the safety lock 33 is located in the movable groove 3231 and can rotate in the movable groove 3231. Therefore, the movable groove 3231 formed by the bending of the trigger button 323 provides the safety lock 33 with a movable space, ensuring that it can rotate freely in the unlocked state.

[0068] The needle assisting assembly 20 includes a clamping unit 21 and a puncture needle 22. The puncture needle 22 is detachably installed in the clamping unit 21, and the clamping unit 21 is connected to the driving rod 32. In this way, the puncture needle 22 can be replaced, so that the needle assisting device 100 can be used repeatedly. During multiple uses, it is only necessary to replace a different puncture needle 22 and install it in the clamping unit 21.

[0069] The clamping unit 21 includes a clamping block 211 and a second elastic member 212. The clamping block 211 is rotatably connected to the driving rod 32, and the second elastic member 212 is located on one side of the connection point between the clamping block 211 and the driving rod 32. One end of the second elastic member 212 abuts against the clamping block 211, and the other end abuts against the driving rod 32. The puncture needle 22 is installed on the other side of the connection point between the clamping block 211 and the driving rod 32. Thus, since the second elastic member 212 and the puncture needle 22 are respectively located on both sides of the connection point between the clamping block 211 and the driving rod 32, when one side of the clamping block 211 rises, it means the other side drops. Therefore, when the elastic force of the second elastic member 212 acts on the clamping block 211 and the driving rod 32 respectively, and pushes the clamping block 211 and the driving rod 32 to move away from each other respectively, the clamping force of the other end of the clamping block 211 on the puncture needle 22 will be stronger, thereby ensuring the clamping strength of the clamping unit 21 on the puncture needle 22 and preventing the problem of the puncture needle 22 falling off.

[0070] Of course, in other embodiments, the clamping unit 21 can also be set as a clip that generates clamping force only through deformation. Or a torsion spring can be installed at one end connection of the clamping block 211 and the driving rod 32, so as to drive the clamping block 211 to always maintain the clamping force on the puncture needle 22.

[0071] Specifically, in this embodiment, a plurality of clamping protrusions 2111 are further protruded on the clamping block 211. The clamping protrusions 2111 can be adapted to the grooves on the puncture needle 22, and at the same time, the limiting effect on the puncture needle 22 is also improved. When the puncture needle 22 applicable to the clamping block 211 does not have a groove, the clamping protrusions 2111 can also improve the clamping pressure on the puncture needle 22.

[0072] A dressing 40 is also adhered to the needle assisting assembly 20. After the needle assisting assembly 20 completes the puncture action, the operator can adhere the dressing 40 to the patient's skin to ensure the stable position of the needle assisting assembly 20.

[0073] Compared with the prior art, the present utility model is provided with an abutting block capable of abutting against the patient's skin at the front end of the needle assisting device 100. By means of the obliquely arranged abutting block and the abutting surface 121 arranged in an arc surface on the abutting block, the needle assisting assembly 20 can be stably arranged at an angle with the skin, which is convenient for the needle assisting assembly 20 to pierce along an angle inclined to the skin, and is also convenient for the needle assisting device 100 to adjust the angle. And a locking structure is provided to prevent accidental touch of the trigger switch, which can ensure that the needle assisting device 100 will not accidentally touch and extend the needle assisting assembly 20 to cause a medical accident.

[0074] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0075] The above-described embodiments only express several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A needle aid, characterized in that, The needle assisting device is used to insert a puncture needle (22) under the skin of a patient, and the needle assisting device includes: a housing assembly (10), the housing assembly (10) includes a housing (11), and the housing (11) has a chamber (111); a needle assisting assembly (20), the needle assisting assembly (20) is used to clamp the puncture needle (22) and move it between a puncture position and an energy storage position in the chamber (111), so that the needle assisting assembly (20) obtains needle assisting potential energy at the energy storage position and releases the needle assisting potential energy at the puncture position to insert the puncture needle (22) under the skin of the patient; a locking structure, the locking structure is arranged on the surface of the housing (11), and the locking structure is used to lock the needle assisting assembly (20) to the energy storage position; a driving mechanism (30), the driving mechanism (30) is used to drive the needle assisting assembly (20) from the energy storage position to the puncture position when the locking structure is unlocked; an abutting plate (12) extends from an end of the housing (11), and the abutting plate (12) is used to contact the skin of the patient to adjust the insertion angle of the puncture needle (22).

2. The needle aid according to claim 1, characterized in that, The locking structure includes a triggering unit, the triggering unit has a locking position and an unlocking position, the triggering unit is configured to be able to move between the locking position and the unlocking position in response to an external force, and when the triggering unit is in the locking position, it abuts against the needle assisting assembly (20), and when the triggering unit is in the unlocking position, it disengages from the needle assisting assembly (20).

3. The needle aid according to claim 2, characterized in that, The driving mechanism (30) includes a first elastic member (31), the needle assisting assembly (20) includes a driving rod (32), the driving rod (32) is located in the chamber (111), one end of the first elastic member (31) abuts against the driving rod (32), and the other end abuts against the housing assembly (10).

4. The needle aid according to claim 3, characterized in that, The housing assembly (10) includes a locking seat (13) and an unlocking switch (14), the locking seat (13) is connected to an end of the housing (11) away from the needle assisting assembly (20), and a first clamping block (131) protrudes from the inner wall of the locking seat (13). The outer peripheral side of one end of the driving rod (32) close to the locking seat (13) has a second clamping block (321), and the outer diameter of the second clamping block (321) is greater than the inner diameter of the first clamping block (131), so that the first clamping block (131) and the second clamping block (321) are clamped and matched; The locking seat (13) has an opening (132), the unlocking switch (14) is arranged in the opening (132) and can move along the axial direction of the locking seat (13). As the unlocking switch (14) moves towards the driving rod (32), the unlocking switch (14) can abut against the second clamping block (321) and make it move in the radially inward direction to release the locking between the first clamping block (131) and the second clamping block (321).

5. The needle aid according to claim 4, characterized in that, An abutting flange (141) is convexly provided on the outer peripheral side of the unlocking switch (14); a first inclined surface (1411) is provided on the side of the abutting flange (141) facing the driving rod (32); a second inclined surface (3211) is provided on the outer peripheral side of the second clamping block (321); the first inclined surface (1411) and the second inclined surface (3211) are inclined in the same direction.

6. The needle assisting device according to claim 4, characterized in that, The housing (11) is provided with a straight groove (112), the unlocking switch (14) is provided with a rotating groove (142), the rotating groove (142) comprises a first section (1421) and a second section (1422) which are connected, the first section (1421) is arranged parallel to the straight groove (112), and the second section (1422) is arranged at an angle to the first section (1421); The housing assembly (10) further comprises a locking column (15), wherein the locking column (15) is inserted into the straight groove (112) and the rotating groove (142), and as the locking column (15) moves from one end to the other end of the straight groove (112), the locking column (15) also moves from the first section (1421) to the second section (1422) to drive the unlocking switch (14) to rotate from the first position to the second position, and a step (143) is provided on the side wall of the unlocking switch (14). When the unlocking switch (14) is located at the second position, the step (143) abuts against the first clamping block (131) to stop the axial movement of the unlocking switch (14), and when the unlocking switch (14) is located at the first position, the step (143) is disengaged from the first clamping block (131).

7. The needle aid according to claim 3, characterized in that A trigger groove (113) is provided on the housing (11), and the drive rod (32) includes a main rod (322) and a trigger button (323). The trigger button (323) is elastically connected to the main rod (322) and partially extends out of the trigger groove (113). The trigger button (323) abuts against the groove wall of the trigger groove (113) and stops the movement of the drive rod (32) driving the auxiliary needle assembly (20) to extend out of the chamber (111), and the trigger button (323) is configured to be able to release the abutment with the groove wall of the trigger groove (113) in response to movement toward the main rod (322).

8. The needle aid according to claim 7, characterized in that, The needle-assisting assembly (20) further comprises a safety lock buckle (33); a toggle groove (114) is provided on a side of the housing (11) facing away from the trigger groove (113); the safety lock buckle (33) is rotatably connected to the main rod (322), and a portion of the safety lock buckle (33) extends out of the toggle groove (114); The safety lock catch (33) can switch the trigger unit between a locked position and an unlocked position by rotating relative to the main rod (322); when the trigger unit is in the locked position, one end of the safety lock catch (33) abuts against the trigger button (323) and stops the trigger button (323) from moving toward the main rod (322); when the trigger unit is in the unlocked position, the safety lock catch (33) and the trigger button (323) are spaced apart from each other.

9. The needle assisting device according to claim 8, characterized in that, The needle-assisting assembly (20) further comprises a safety lock buckle (33); a toggle groove (114) is provided on a side of the housing (11) facing away from the trigger groove (113); the safety lock buckle (33) is rotatably connected to the main rod (322), and a portion of the safety lock buckle (33) extends out of the toggle groove (114); The safety lock catch (33) has a locked state and an unlocked state, and can be switched between the locked state and the unlocked state by rotating relative to the main rod (322). When the safety lock catch (33) is in the locked state, one end of the safety lock catch (33) abuts against the trigger button (323) and stops the trigger button (323) from moving toward the main rod (322). When the safety lock catch (33) is in the unlocked state, the safety lock catch (33) and the trigger button (323) are spaced apart from each other.

10. The needle assisting device according to claim 3, characterized in that, The needle-assisting assembly (20) further comprises a clamping unit (21) and a puncture needle (22), wherein the puncture needle (22) is detachably mounted in the clamping unit (21), and the clamping unit (21) is connected to the driving rod (32).

11. The needle assisting device according to claim 10, wherein, The clamping unit (21) comprises a clamping block (211) and a second elastic member (212), wherein the clamping block (211) is rotatably connected to the driving rod (32), and the second elastic member (212) is located on one side of a connection point between the clamping block (211) and the driving rod (32), one end of the second elastic member (212) abuts against the clamping block (211), and the other end abuts against the driving rod (32), and the puncture needle (22) is installed on the other side of a connection point between the clamping block (211) and the driving rod (32).

12. The needle aid according to claim 1, characterized in that, The abutment plate (12) is arranged obliquely relative to the axis of the shell assembly (10), and the abutment plate (12) has an abutment surface (121) for abutting against human skin, and at least a part of the abutment surface (121) is a curved surface structure.

13. The needle aid according to claim 12, characterized in that, The abutting plate (12) is inclined in the axial direction of the housing, and an avoidance groove (122) is formed in the abutting plate (12). At least a part of the needle assisting assembly (20) extends to the side of the abutting plate (12) facing away from the housing assembly (10) through the avoidance groove (122); the avoidance groove (122) is formed in the middle of the abutting plate (12) and forms a first abutting segment (123) and a second abutting segment (124) arranged at intervals, and the first abutting segment (123) and the second abutting segment (124) are symmetrically arranged with respect to the median line of the abutting plate (12).

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