Injection auxiliary device

Abstract

The invention relates to the technical field of injector auxiliary equipment, in particular to an injection auxiliary device.A needle head cover is in threaded connection with a main body, the needle head cover and the main body form a containing cavity used for containing an injector, the main body comprises a rear end opening communicated with the containing cavity, and a pushing mechanism can penetrate into the rear end opening and then stretch into the containing cavity; one side of the main body is provided with a long-strip-shaped opening which is arranged along the length direction and is communicated with the accommodating cavity, the main body further comprises an indication limiting structure which penetrates through the long-strip-shaped opening and extends outwards, and the main body further comprises a graduated scale arranged at the long-strip-shaped opening and braille alphabets arranged at the graduated scale. The beneficial effects lie in that the whole injector is clamped in the threaded cavity of the main body-needle head cover, and the pushing mechanism is pushed and pulled by a single hand, so that the limiting part can stop when colliding with the strip-shaped opening with the braille graduated scale, and the three functions of accurate dose positioning, axial needle head fixing and automatic reading by blind people are completed at one time; and safe, accurate and barrier-free use is considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of syringe auxiliary equipment, in particular to a syringe auxiliary device. BACKGROUND

[0002] As one of the most commonly used drug delivery tools in the medical field, syringes are widely used in subcutaneous, intramuscular and intravenous injection scenarios. However, in actual use, especially when operated by non-professionals (such as patients themselves, family members or caregivers), the following technical problems generally exist: Inaccurate injection dose control: Traditional syringes rely on visual observation of the scale, which is prone to dose errors due to visual angle deviation or operational errors, especially for visually impaired people (such as the blind or low vision groups), who are almost unable to independently complete accurate injection.

[0003] Poor auxiliary adaptability: The tactile recognition needs of blind users are not considered, and there is a lack of Braille scale and anti-slip operation structure.

[0004] Therefore, the existing technology still has obvious defects in injection accuracy and barrier-free use. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a syringe auxiliary device to solve the problems of inaccurate dose and inability of blind people to operate independently, and to achieve full population, full cycle, and barrier-free safe injection.

[0006] The technical solution adopted by the present application to solve the technical problem is to provide a syringe auxiliary device to assist in the use of a syringe, the syringe comprising a needle, a needle cylinder and a piston push rod, a main body and a needle cover, the needle cover being threadedly connected with the main body, and the two forming a containing cavity for placing the syringe, the needle cover being provided with a front end opening communicating with the containing cavity, when the syringe is placed in the containing cavity, the needle of the syringe is arranged to extend outward through the front end opening, and the needle cylinder of the syringe is arranged to be limited in the containing cavity inside the front end opening; a pushing mechanism, the main body comprising a rear end opening communicating with the containing cavity, the pushing mechanism being arranged to extend into the containing cavity through the rear end opening, and a front and rear moving structure being arranged between the pushing mechanism and the containing cavity to push the piston push rod of the syringe; a side of the main body is provided with a long strip opening arranged along the length direction and communicating with the containing cavity, and further comprising an indication limiting structure penetrating into the long strip opening and extending outward, the indication limiting structure comprising an indication part extending outward from the long strip opening, and a limiting part arranged in the containing cavity, the pushing mechanism being limited by the limiting part in the pushing stroke; The main body further comprises a scale arranged at the long strip opening, and a Braille arranged at the scale, which represents the scale value corresponding to the scale.

[0007] Preferably, the front end opening of the needle cover is provided with a needle protection part, the needle protection part comprises a lifting protection cover and a return spring, the lifting protection cover comprises a bottom opening and a top needle hole, the lifting protection cover is partially embedded into the accommodating cavity through the front end opening, and a first limiting structure is arranged between the end of the lifting protection cover and the needle cover.

[0008] Preferably, one end of the return spring is fixed to the inner side of the lifting protection cover.

[0009] Preferably, the first limiting structure comprises a first protruding ring arranged at the end of the lifting protection cover and extending outward, and the first protruding ring is limited to the inner side of the front end opening of the needle cover; and the front end of the needle cylinder is provided with a needle part for fixing the needle, and the partial segment of the needle part has a cross-sectional area smaller than that of the needle cylinder; and the needle cover is a conical structure to block and limit the needle cylinder.

[0010] Preferably, the limiting part is an annular structure, the piston push rod passes through the annular hole of the limiting part and abuts against the top of the pushing mechanism; and the connecting segment between the indicating part and the limiting part passes through the long strip opening, the connecting segment is wrapped with a flexible layer, and the connecting segment abuts against the long strip opening through the flexible layer.

[0011] Preferably, the end of the pushing mechanism is provided with a needle withdrawing structure, the needle withdrawing structure is provided with a needle withdrawing bent groove, and the bottom of the needle withdrawing bent groove is inwardly and downwardly inclined from the edge as a starting point to form a conical bottom or a similar conical bottom.

[0012] Preferably, the third magnet is arranged in the needle withdrawing bent groove to magnetically attract the needle.

[0013] Preferably, the needle withdrawing bent groove is arranged at a non-central position of the end of the pushing mechanism; and the end of the pushing mechanism is inwardly and downwardly inclined from the edge as a starting point to the edge of the slot of the needle withdrawing bent groove.

[0014] Preferably, the needle withdrawing structure is detachably arranged in the accommodating groove at the end of the pushing mechanism, the needle withdrawing structure is embedded with a first magnet, and the end of the pushing mechanism is embedded with a second magnet; and the first magnet and the third magnet are arranged in the needle withdrawing structure, or the first magnet and the third magnet are the same magnet structure.

[0015] Preferably, one side of the main body is provided with a recessed surface, the long strip opening is arranged in the recessed surface, the Braille is expressed as a minimum unit of scale value at the long strip opening close to the rear end opening, and the scale value is sequentially increased by one unit of interval towards the front end opening direction; and the pushing mechanism is further provided with a sliding rail, and the main body is provided with a limiting protrusion matched with the sliding rail.

[0016] The present application has the advantages that, compared with the prior art, the present application can achieve the functions of precise dose positioning, needle axial fixation and blind person self-reading by clamping the syringe in the threaded cavity of the main body-needle cover, stopping at the long strip opening with Braille scale by one push of the pushing mechanism, giving tactile feedback, and one-time completion of the three functions, and the present application also has the advantages of safety, precision and barrier-free use. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and examples, wherein: The present application will be further described below in conjunction with the drawings and examples, wherein: Figure 1 is a schematic view of the pushing mechanism of the injection assisting device of the present application in the pushing start position; Figure 2 is a schematic view of the pushing mechanism of the injection assisting device of the present application in the storage state; Figure 3 is a schematic view of the existing syringe; Figure 4 is a partial enlarged schematic view of the main body and the needle cover of the present application in the exploded state; Figure 5 is a schematic view of the needle cover of the present application; Figure 6 is a partial cross-sectional schematic view of the reset spring of the needle protection part of the present application in the compressed state; Figure 7 is a partial cross-sectional schematic view of the needle protection part of the present application sleeved on the needle part; Figure 8 is a partial cross-sectional schematic view of the reset spring of the needle protection part of the present application in the released state; Figure 9 is a partial cross-sectional perspective schematic view of the needle protection part and the needle cover of the present application in the first position; Figure 10 is a partial cross-sectional perspective schematic view of the needle protection part and the needle cover of the present application in the second position; Figure 11 is a partial cross-sectional perspective schematic view of the needle cover and the syringe of the present application; Figure 12is a partial cross-sectional perspective view of the injection assisting device of the present application in a pushing start position; Figure 13 is a partial cross-sectional perspective view of the injection assisting device of the present application with an injector built-in; Figure 14 is a schematic view of the needle retracting structure of the present application; Figure 15 is an exploded perspective view of the end of the pushing mechanism and the needle retracting structure of the present application; Figure 16 is a partial enlarged view of the pushing mechanism of the present application; Figure 17 is a cross-sectional view of the first embodiment of the indication limiting structure of the present application; Figure 18 is a cross-sectional view of the second embodiment of the indication limiting structure of the present application. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present application will be described in detail with reference to the drawings.

[0019] As shown in Figures 1 to 5 , Figure 12 and Figure 13 , the present application provides a preferred embodiment of an injection assisting device 100.

[0020] The injection assisting device 100 is used for assisting the injection of the injection device 200, the injection device 200 comprises a needle 210, a needle cylinder 220 and a piston push rod 230, the injection assisting device 100 comprises a main body 120 and a needle cover 110, the needle cover 110 is threadedly connected with the main body 120, and the needle cover 110 and the main body 120 form a containing cavity 101 for placing the injection device 200, the needle cover 110 is provided with a front end opening 112 which is communicated with the containing cavity 101, when the injection device 200 is placed in the containing cavity 101, the needle 210 of the injection device 200 is arranged to extend outwardly through the front end opening 112, and the needle cylinder 220 of the injection device 200 is arranged to be limited in the containing cavity 101 on the inner side of the front end opening 112; the injection assisting device 100 further comprises a pushing mechanism 130, the main body 120 comprises a rear end opening which is communicated with the containing cavity 101, the pushing mechanism 130 can be arranged to extend into the containing cavity 101 through the rear end opening, and the pushing mechanism 130 and the containing cavity 101 are provided with a front and rear moving structure 131 for pushing the piston push rod 230 of the injection device 200; one side of the main body 120 is provided with a long strip opening 122 which is arranged along the length direction and is communicated with the containing cavity 101, and further comprises an indicating limiting structure 140 which is arranged to extend outwardly through the long strip opening 122, the indicating limiting structure 140 comprises an indicating part 141 which extends outwardly through the long strip opening 122, and a limiting part 142 which is arranged in the containing cavity 101, and the pushing mechanism 130 is limited by the limiting part 142 in the pushing stroke; the main body 120 further comprises a scale 151 which is arranged at the long strip opening 122, and a Braille 152 which is arranged at the scale 151, the Braille 152 represents the scale value corresponding to the scale 151.

[0021] In the embodiment, the injection assisting device 100 is used for assisting the injection device 200 to complete the injection operation, especially for facilitating the operation of the blind people, so that the blind people can know the injection amount, and the injection device 200 is convenient to assemble and disassemble, especially in the injection process, the injection amount can be known by the movement of the indicating limiting structure 140 and the corresponding Braille 152 in the movement process. Generally, the injection assisting device 100 is adapted to the injection device 200 with a conventional structure, the injection device 200 is a conventional medical injection device 200 in the prior art, or a special injection device 200, such as an insulin injection device 200, the injection device 200 generally comprises a needle 210 for puncturing and delivering liquid medicine, a needle cylinder 220 for storing liquid medicine to be injected, and a piston push rod 230 for pushing the liquid medicine in the needle cylinder 220 to be discharged through the needle 210, the piston push rod 230 can reciprocate along the axis direction of the needle cylinder 220, and the quantitative injection of the liquid medicine is realized by pushing the piston push rod 230.

[0022] The Braille 152 is a convex injection molding and is integrally formed with the main body 120 of the injection assisting device 100. Further, considering the sliding direction of the blind person's fingers, the Braille 152 scale is arranged perpendicular to the sliding direction to avoid misreading.

[0023] In the embodiment, the needle cover 110 and the main body 120 are detachably connected by threads. The mating surfaces of the threaded connection are provided with matching external threads and internal threads. Specifically, the needle cover 110 includes an extending male thread 111. The external thread of the needle cover 110 is inserted into the internal thread of the main body 120 to achieve threaded connection. Further, after the needle cover 110 is assembled with the main body 120, an internally enclosed cylindrical accommodating cavity 101 is formed, which is adapted to the outer contour of the syringe 200. The inner diameter of the accommodating cavity 101 and the outer diameter of the conventional syringe 200 barrel 220 are gap-fitted, with a gap value controlled between 0.5-1mm, which facilitates smooth placement of the syringe 200 and avoids excessive shaking after placement. Further, the threaded connection is not only convenient to disassemble and assemble, but also facilitates quick assembly and disassembly and recycling after use. In addition, according to the length requirements of different specifications of the syringe 200, the effective length of the accommodating cavity 101 can be adjusted by adjusting the depth of the threaded connection, which improves the adaptability of the device and the process of twisting by the blind user.

[0024] In addition, the end of the needle cover 110 away from the main body 120 is provided with a front end opening 112 communicating with the accommodating cavity 101. Meanwhile, the front end of the barrel 220 is provided with a needle head 211 fixing the needle 210. The cross-sectional area of part of the needle head 211 is smaller than that of the barrel 220. In actual use, the needle head 211 extends out of the front end opening 112, and the barrel 220 abuts against the needle cover 110, so as to realize the fixed design of the syringe 200 in the accommodating cavity 101. Further, the front end opening 112 matches the fixed needle 210 of the syringe 200, which can form all-around wrapping and limiting of the syringe 200, ensuring that the syringe 200 always maintains stable axis during injection, avoiding problems such as needle 210 deviation and puncture deviation caused by unstable manual holding.

[0025] In the embodiment, the injection assisting device 100 further includes a pushing mechanism 130 for driving the syringe 200 piston push rod 230. The end of the main body 120 away from the needle cover 110 is provided with a rear end opening communicating with the accommodating cavity 101. The inner diameter of the rear end opening is matched with the outer diameter of the pushing mechanism 130. The pushing mechanism 130 can extend into the accommodating cavity 101 after penetrating into the rear end opening along the axial direction. In order to realize the stable forward and backward movement of the pushing mechanism 130 to accurately push the piston push rod 230, the pushing mechanism 130 is further provided with a sliding rail, and the main body 120 is provided with a limiting protrusion matched with the sliding rail. Figure 16 ​

[0026] In this embodiment, in order to achieve precise control of injection dosage and tactile prompts suitable for blind users, a long strip opening 122 communicating with the receiving cavity 101 is provided on one side of the main body 120 along its length direction. The length of the long strip opening 122 matches the maximum travel of the pushing mechanism 130, and the width is controlled at 8-10mm. This facilitates the connection between the internal structure and the external indicator part 141, and also avoids the opening being too large, which would reduce the sealing of the receiving cavity 101. A pointing and limiting structure 140 is provided corresponding to the elongated opening 122. The pointing and limiting structure 140 is T-shaped and consists of an integrally formed pointing part 141 and a limiting part 142. The pointing part 141 is located outside the main body 120 and extends outward from the elongated opening 122. The limiting part 142 is located inside the receiving cavity 101 and cooperates with the pushing mechanism 130. The two are fixed by a connecting section 143 that passes through the elongated opening 122. The width of the connecting section 143 is matched with the width of the elongated opening 122 to ensure that the pointing and limiting structure 140 can slide smoothly along the elongated opening 122 without significant shaking.

[0027] Specifically, combined Figure 17 and Figure 18 The limiting part 142 has an annular structure, and the piston push rod 230 passes through the annular hole 1421 of the limiting part 142 and abuts against the top of the pushing mechanism 130; and, the indicating part 141 and the limiting part 142 include a connecting section 143 passing through the elongated opening 122, the connecting section 143 is wrapped with a flexible layer 1431, the connecting section 143 abuts against the elongated opening 122 through the flexible layer 1431, and the surface of the indicating part 141 is provided with anti-slip texture, so that blind users can perceive its position by touch. The specific usage process is as follows: After installing the syringe 200, adjust the pushing mechanism 130 until the piston rod 230 is pressed tightly but the needle 210 is not ejecting liquid. Next, adjust the indicator 141 so that it slides up and down on the main body 120, first sliding to the bottom. At this time, the limiting part 142 abuts against the top of the pushing mechanism 130, and the current scale value A is obtained through the Braille 152. Continue to adjust the indicator 141 and slide it according to the required injection volume until the next scale value B is reached. At this time, the scale value B = scale value A + injection volume. Finally, push the piston rod 230 through the pushing mechanism 130 until you feel resistance and stop pushing. At this time, the pushing mechanism 130 abuts against the limiting part 142, and the injection is completed.

[0028] Furthermore, the connecting segment 143 is wrapped with a flexible layer 1431. The connecting segment 143 is pressed against the elongated opening 122 through the flexible layer 1431. The thickness of the flexible layer 1431 combined with the connecting segment 143 is slightly larger than the width of the gap in the elongated opening 122. Relying on the compressibility of the flexible layer 1431, the connecting segment 143 is radially squeezed by both sides of the elongated opening 122, forming a continuous interference. The positive pressure generated by the interference maintains static frictional resistance between the indicating limiting structure 140 and the main body 120. When the pushing mechanism 130 reaches the set scale and impacts the limiting part 142, this resistance is sufficient to counteract the impact inertia, ensuring that the indicating limiting structure 140 does not slip or retract, thereby achieving reliable positioning that stops upon impact.

[0029] Furthermore, the surface of the indicator 141 is provided with anti-slip texture, which makes it easier for blind users to perceive its position by touching it with their hands. The anti-slip texture gives the blind person's "fingertips" the same resolution as the "eyes" of a sighted person, turning "not being able to see" into "being able to touch accurately", and truly achieving safe and accurate injection.

[0030] like Figures 6 to 10 As shown, the present invention provides a preferred embodiment of the needle protection part 160.

[0031] A needle protection part 160 is provided at the front opening 112 of the needle cover 110. The needle protection part 160 includes a lifting protective cover 161 and a return spring 162. The lifting protective cover 161 includes a bottom opening 1613 and a top needle hole 1611. The lifting protective cover 161 partially passes through the front opening 112 and is embedded in the receiving cavity 101. A first limiting structure is provided between the end of the lifting protective cover 161 and the needle cover 110.

[0032] After the syringe 200 is installed and fixed, the length of the needle 210 extending from the front opening 112 is a fixed distance. Generally, different models of syringes 200 are used with needle protection parts 160 of different heights, so that under normal circumstances, the needle 210 is located inside the needle lifting protective cover 161. The front opening 112, the bottom opening 1613, the internal space of the lifting protective cover 161, and the top needle hole 1611 are connected in sequence, and the needle 210 passes through the front opening 112 and the bottom opening 1613 in sequence into the internal space of the lifting protective cover 161. The lifting protective cover 161 moves up and down at the front opening 112. At the same time, under normal conditions, the return spring 162 keeps the lifting protective cover 161 at its outermost position. Generally, one end of the return spring 162 rests against the inner top of the lifting protective cover 161, and the other end rests against the needle head 211.

[0033] The top of the lifting protective cover 161 is provided with anti-slip protrusions 1612 to increase the friction with the skin and prevent slippage.

[0034] When administering the injection, press the lifting protective cover 161 against the skin and push it forward to lower the lifting protective cover 161 at the front opening 112 and to its lowest point. This allows the needle 210 to pass through the front opening 112, the bottom opening 1613, and the internal space of the lifting protective cover 161 in sequence, and then extend out from the top needle hole 1611 and be inserted into the skin. At this time, the return spring 162 is in a compressed state.

[0035] In this embodiment, reference Figures 6 to 8 One end of the return spring 162 is fixed to the top inner side of the lifting protective cover 161, meaning the other end of the return spring 162 is suspended. Normally, it extends to the bottom opening 1613 of the lifting protective cover 161. When the needle head 211 is installed in the syringe 200, it approaches or penetrates the bottom opening 1613 into the lifting protective cover 161, preferably just abutting against the other end of the return spring 162. During the movement of the lifting protective cover 161, the return spring 162 is located between the lifting protective cover 161 and the needle head 211 and is in a compressed state. The return spring 162 thus resets the lifting protective cover 161 after the external force is removed.

[0036] in, Figure 6 This is a partial cross-sectional view of the return spring 162 of the needle protection part 160 of the present invention in a compressed state, and the lifting protective cover 161 is in cross-sectional view. Figure 7 This is a partial cross-sectional schematic diagram of the needle protection part 160 of the present invention being fitted into the needle head 211, with the lifting protective cover 161 in cross-sectional view. Figure 8 This is a partial cross-sectional view of the reset spring 162 of the needle protection part 160 of the present invention in the released state, and the lifting protective cover 161 is in cross-sectional view.

[0037] The return spring 162 adopts a suspended layout with one end fixed and the other end freely extended. The fixed end is anchored in the central area of ​​the inner side of the top of the lifting protective cover 161, making the entire spring axis coaxial with the lifting axis of the protective cover. When the syringe 200 is inserted into the needle cover 110, the front conical surface of the needle head 211 will slowly slide into the inner cavity of the lifting protective cover 161 through the bottom opening 1613. During this process, the outer peripheral surface of the front end of the needle head 211 just abuts against the free end of the return spring 162. Ideally, it will not be prematurely locked or radially offset, but will complete the axial pre-positioning in a light touch manner. At this time, the free end of the spring is gently supported by the needle head 211, and the entire spring still maintains a near-natural length, with no obvious pre-compression or visible bending, leaving the maximum elastic margin for subsequent stroke.

[0038] During the injection phase, the lifting protective cover 161 is pressed against the skin surface and slides proximally relative to the needle cover 110. The lifting protective cover 161 causes its inner top fixed end to move downwards. Meanwhile, the needle head 211, already abutting against the front opening 112 of the needle cover 110, remains stationary. The return spring 162 is then sandwiched between the two, its upper end moving downwards with the protective cover, while its lower end is held in place by the needle head 211. After the injection, the operator releases their finger, and the fixed end continues to spring upwards, causing the entire lifting protective cover 161 to rise synchronously. The free end remains pressed against the outer periphery of the needle head 211.

[0039] It eliminates the need for a complex support inside the needle cap 110 and ensures that the spring remains coaxial throughout the compression and reset process, avoiding jamming caused by lateral forces. At the same time, the "soft contact" between the free end and the needle head 211 also plays an additional role in damping and noise reduction, making the entire injection process quiet and smooth.

[0040] In this embodiment, reference Figure 9 and Figure 10 The first limiting structure includes a first protruding ring 1614 disposed at the end of the lifting protective cover 161 and extending outward. The first protruding ring 1614 is limited to the inner side of the front opening 112 of the needle cover 110. Through the limiting setting of the first protruding ring 1614 of the first limiting structure, when the lifting protective cover 161 is reset, the first protruding ring 1614 abuts against the inner side of the needle cover 110 and cannot penetrate into the front opening 112, thereby preventing the lifting protective cover 161 from detaching.

[0041] in, Figure 9 and Figure 10 This is a partial cross-sectional perspective view of the needle protection part 160 and the needle cover 110 of the present invention. They are located in different positions. The part of the needle protection part 160 inside the needle cover 110 is in cross-sectional view, and the needle cover 110 is in perspective view.

[0042] In this embodiment, reference Figure 11 The needle cover 110 has a conical structure to block and limit the syringe 220. When the syringe 200 is installed in place, the needle cover 110 will abut against the top of the syringe 220 of the syringe 200. The middle area of ​​the conical slope of the needle cover 110 abuts against the top of the syringe 220, so that a certain space can be reserved between the upper area of ​​the needle cover 110 and the syringe 220, providing sufficient clearance for the descent of the lifting protective cover 161.

[0043] in, Figure 11 This is a partial cross-sectional perspective view of the needle cover 110 and the syringe 200 of the present invention. The part of the syringe 200 inside the needle cover 110 is in cross-sectional view, and the needle cover 110 is in perspective view.

[0044] Furthermore, due to the design of the tapered slope, the syringe 220 can be pressed and positioned at the top, ensuring that the syringe 220 will not shake during the entire injection process.

[0045] like Figure 14 and Figure 15 As shown, the present invention provides a preferred embodiment of the needle retraction structure 310.

[0046] The end of the pushing mechanism 130 is provided with a needle retraction structure 310, which is provided with a needle retraction bending groove 320. The bottom of the needle retraction bending groove 320 is inclined inward and downward from the edge to form a conical bottom or a quasi-conical bottom. The needle retraction bending groove 320 is located at a non-central position at the end of the pushing mechanism 130. The end of the pushing mechanism 130 is inclined inward and downward from the edge of the groove opening of the needle retraction bending groove 320. A needle retraction structure 310 has a needle retraction bending groove 320 on one side surface. The needle retraction bending groove 320 is a blind groove. The groove opening of the needle retraction bending groove 320 is located at and extends through the outer periphery of the needle retraction structure 310. The bottom of the needle retraction bending groove 320 extends inward from the edge of the groove opening and is designed with an inclination to form a continuous and smooth inclined surface. The conical bottom or quasi-conical bottom is used to guide the needle 210 to generate lateral displacement through the inclined surface after the needle 210 enters the needle retraction bending groove 320, and to continuously apply lateral component force, so that the needle 210 undergoes plastic bending in the groove.

[0047] The needle retraction bending groove 320 is offset from the central axis of the end of the push mechanism 130, so that the needle 210 is subjected to a lateral force that is asymmetrical with respect to its axis when it enters the groove. This eccentric torque causes the needle 210 to bend in a directional manner, avoiding bidirectional random bending or irregular offset that may occur in the centrally symmetrical structure, ensuring that the bending direction is consistent, the bending angle is stable, and reducing the axial thrust required for bending.

[0048] In this embodiment, a third magnet 311 is provided in the needle retraction bending groove 320 for magnetically attracting the needle tip 210. The third magnet 311 is embedded in the groove wall or bottom of the needle retraction bending groove 320 to form an adsorption surface; when the needle tip 210 approaches the needle retraction bending groove 320, the magnetic field generated by the third magnet 311 applies a magnetic attraction force to the needle tip 210 in the direction of the groove opening, causing the needle tip 210 to be attracted and deflected and guided into the needle retraction bending groove 320, thereby guiding the needle tip 210 into the groove.

[0049] When the needle 210 enters the needle retraction bending groove 320 and comes into contact with the adsorption surface during the bending process, the third magnet 311 generates a magnetic attraction force on the needle 210, keeping the needle 210 in contact with the groove wall or bottom, preventing the needle 210 from springing back or coming out after bending, thereby maintaining the bending shape and fixing the position of the needle 210 relative to the needle retraction structure 310.

[0050] In this embodiment, the needle retraction structure 310 is detachably disposed in the end receiving groove of the pushing mechanism 130. The needle retraction structure 310 is embedded with a first magnet, and the end of the pushing mechanism 130 is embedded with a second magnet 133. The first magnet and the third magnet 311 are both disposed in the needle retraction structure 310, or the first magnet and the third magnet 311 are the same magnet structure.

[0051] The first magnet and the second magnet 133 are opposite in polarity and arranged opposite each other. They achieve axial positioning and quick assembly / disassembly of the needle retraction structure 310 and the pushing mechanism 130 through magnetic attraction. The third magnet 311 is also disposed inside the needle retraction structure 310 and is used to generate a magnetic attraction effect on the needle tip 210. The first magnet and the third magnet 311 can be independent magnets or can be composed of the same permanent magnet, which has both connection and magnetic attraction functions.

[0052] like Figure 12 , 13 As shown in Figures 1 and 15, the present invention provides a preferred embodiment of the needle retraction structure 310.

[0053] A grooved surface 1201 is provided on one side of the main body 120, and a long strip opening 122 is provided in the grooved surface 1201. Braille 152 is represented as the smallest unit scale value at the end of the long strip opening 122 near the rear opening, and increases by one unit scale value at the same interval towards the front opening 112.

[0054] The groove surface 1201 is recessed relative to the outer wall of the main body 120, forming a long strip-shaped recessed area. The long strip opening 122 is opened at the bottom of the groove surface 1201 and communicates with the receiving cavity 101 inside the main body 120. The length direction of the long strip opening 122 is parallel to the axis of the main body 120. A scale 151 is provided on the surface of the groove surface 1201. The scale value of the scale 151 is presented in the form of Braille 152. The starting point of the Braille 152 is located at the end of the long strip opening 122 near the rear opening. The Braille 152 at this point represents the smallest unit scale. From the starting point, the Braille 152 is continuously arranged at equal intervals along the long strip opening 122 toward the front opening 112. Each time the distance is moved, the scale value shown by the Braille 152 increases by one unit, thereby forming an equally spaced, tactile scale sequence.

[0055] Among them, reference Figure 17 and Figure 18 Due to the different cross-sectional designs of the main body 120, the cross-sectional design of the limiting part 142 is also different to adapt to the cross-sectional design of the main body 120.

[0056] The above description is merely the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the claims of the present invention are covered by the present invention.

Claims

1. An injection aid device for assisting a syringe in injection, the syringe comprising a needle, a syringe barrel, and a piston rod, characterized in that: The syringe has a main body and a needle cover, the needle cover being threadedly connected to the main body and the two forming a receiving cavity for placing a syringe. The needle cover has a front opening communicating with the receiving cavity. When the syringe is placed in the receiving cavity, the needle of the syringe extends outward through the front opening, and the syringe barrel is confined in the receiving cavity inside the front opening. The pushing mechanism includes a rear opening that communicates with the receiving cavity. The pushing mechanism can be inserted into the rear opening and then extended into the receiving cavity. A back-and-forth moving structure is provided between the pushing mechanism and the receiving cavity to push the piston rod of the syringe. The main body has a long opening along its length and communicating with the receiving cavity on one side, and also includes an indicator limiting structure that passes through the long opening and extends outward. The indicator limiting structure includes an indicator part extending outward from the long opening and a limiting part disposed in the receiving cavity. The pushing mechanism collides with the limiting part and limits the movement during the pushing stroke. The main body also includes a scale set at the opening of the long strip, and Braille set at the scale, wherein the Braille indicates the scale value corresponding to the scale.

2. The injection aid device according to claim 1, characterized in that: The needle cover has a needle protection part at the front opening. The needle protection part includes a lifting protective cover and a return spring. The lifting protective cover includes a bottom opening and a top needle hole. The lifting protective cover part passes through the front opening and is embedded in the receiving cavity. A first limiting structure is provided between the end of the lifting protective cover and the needle cover.

3. The injection aid device according to claim 2, characterized in that: One end of the reset spring is fixed to the inside of the lifting protective cover.

4. The injection aid device according to claim 2, characterized in that: The first limiting structure includes a first convex ring disposed at the end of the lifting protective cover and extending outward, the first convex ring being limited to the inner side of the front opening of the needle cover; and a needle head for fixing the needle is disposed at the front end of the syringe, a portion of the cross-sectional area of ​​the needle head being smaller than the cross-sectional area of ​​the syringe; the needle cover is a conical structure to block and limit the syringe.

5. The injection aid device according to claim 1, characterized in that: The limiting part is an annular structure, and the piston push rod passes through the annular hole of the limiting part and abuts against the top of the pushing mechanism; and the indicating part and the limiting part include a connecting section passing through the elongated opening, the connecting section is wrapped with a flexible layer, and the connecting section abuts against the elongated opening through the flexible layer.

6. The injection aid device according to claim 1, characterized in that: The end of the pushing mechanism is provided with a needle retraction structure, which is provided with a needle retraction bending groove. The bottom of the needle retraction bending groove is set inward and downward from the edge to form a conical bottom or a conical-like bottom.

7. The injection aid device according to claim 6, characterized in that: A third magnet is provided in the needle retraction bending groove for magnetically attracting the needle tip.

8. The injection aid device according to claim 6, characterized in that: The needle retraction bending groove is located at a non-central position at the end of the pushing mechanism; and the end of the pushing mechanism is inclined inward and downward from the edge of the needle retraction bending groove.

9. The injection aid device according to claim 7, characterized in that: The needle retraction structure is detachably mounted in the end receiving groove of the pushing mechanism. The needle retraction structure is embedded with a first magnet, and the end of the pushing mechanism is embedded with a second magnet. The first magnet and the third magnet are both mounted in the needle retraction structure, or the first magnet and the third magnet are the same magnet structure.

10. The injection aid device according to claim 1, characterized in that: The main body has a grooved surface on one side, and the elongated opening is located in the grooved surface. The Braille is represented as the smallest unit scale value at the end of the elongated opening near the rear end, and increases by one unit scale value at equal intervals towards the front end. The pushing mechanism is also provided with a sliding rail, and the main body is provided with a limiting protrusion that cooperates with the sliding rail.

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