Syringe auxiliary device

Abstract

The utility model relates to the technical field of injectors, and provides an injector auxiliary device which comprises a first sleeve, a second sleeve, a third sleeve and an elastic piece, and the first sleeve comprises a plurality of elastic arms arranged at intervals in the circumferential direction of the first sleeve; the second sleeve comprises a jacking part, the second sleeve is arranged and fixed on the first sleeve in a sleeving manner, and the jacking part is used for jacking the plurality of elastic arms so as to enable the plurality of elastic arms to clamp the injector; the third sleeve is movably mounted on the first sleeve or the second sleeve along the axial direction of the injector; and the elastic piece applies elastic force to the third sleeve, so that the third sleeve covers a needle head of the injector after the injector auxiliary device is mounted on the injector. After the injector auxiliary device is installed on the injector, the elastic piece can apply elastic force to the third sleeve so that the third sleeve can cover the needle head of the injector, and the problem that the needle head is exposed outside when the injector injects is solved.

Description

Technical Field

[0001] The present application relates to the technical field of syringes, and in particular to a syringe auxiliary device. Background Art

[0002] At present, the syringes used in the market mainly include disposable simple syringes and syringes specially used for self-injection of drugs such as insulin. There are two main types of syringes currently used for injecting insulin. One is a disposable syringe, in which the drug is pre-installed in the syringe. When in use, the needle is inserted, and then the dose is adjusted and the syringe is directly self-injected until the drug in the syringe is used up and then discarded. The other is a repeatable syringe, which can separate the drug chamber from the drive device. When the syringe is used, the drug and the needle are installed separately, and the drug is self-administered according to the preset dose. When the drug is used up, the bottle is taken out and replaced with a new drug.

[0003] The needle of the above-mentioned syringe is exposed during each injection. When the user performs self-injection or is injected, the user often feels fear because of the sight of the needle. Especially for underage patients, when adults help them with injections, the injection often fails due to fear, and then the needle may need to be replaced or a simple syringe may be used for re-injection. This not only wastes the needle or injection solution, but also causes the patient to suffer the pain of needlestick again, affecting the injection effect. In addition, since the needle of the syringe is exposed after the injection, it is also easy to cause secondary infection during post-processing. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a syringe auxiliary device to solve the problem of the syringe needle being exposed.

[0005] An embodiment of the present application proposes a syringe auxiliary device, comprising a first sleeve, a second sleeve, a third sleeve and an elastic member, wherein the first sleeve comprises a plurality of elastic arms arranged at intervals along its circumference; the second sleeve comprises a pressing portion, the second sleeve is sleeved and fixed on the first sleeve, the pressing portion presses the plurality of elastic arms so that the plurality of elastic arms clamp the syringe; the third sleeve is movably mounted on the first sleeve or the second sleeve along the axial direction of the syringe; the elastic member applies elastic force to the third sleeve so that the third sleeve covers the needle of the syringe after the syringe auxiliary device is mounted on the syringe.

[0006] The syringe auxiliary device provided in the embodiment of the present application includes a first sleeve and a second sleeve. When the second sleeve is sleeved and fixed on the first sleeve, the pressing part of the second sleeve can press the multiple elastic arms of the first sleeve so that the multiple elastic arms press the syringe, thereby fixing the syringe auxiliary device on the syringe; since the syringe auxiliary device is installed by pressing the syringe with the elastic arms, the syringe auxiliary device can be installed on various types of syringes, such as insulin syringes, simple syringes, etc. The syringe auxiliary device also includes a third sleeve and an elastic member, wherein the third sleeve is movably installed on the first sleeve or the second sleeve along the axial direction of the syringe; before injection, the elastic member applies elastic force to the third sleeve so that the third sleeve covers the needle of the syringe to prevent the needle from being exposed; during injection, the skin pushes the third sleeve so that the third sleeve compresses the elastic member so that the needle is gradually inserted into the skin. Since the patient cannot see the needle during the above process, fear of the patient when seeing the needle is avoided, the success rate of injection is guaranteed, and the injection effect is improved.

[0007] In some embodiments, the third sleeve is movably installed in the second sleeve along the axial direction of the second sleeve, and the elastic member is located between the first sleeve and the third sleeve.

[0008] In some embodiments, an annular groove is provided on one end surface of the third sleeve, the elastic member has a first end and a second end along its axial direction, and the first end of the elastic member is located in the annular groove;

[0009] A limiting protrusion is provided on the inner wall of the first sleeve, and the limiting protrusion has a first side surface facing away from the elastic member and a second side surface facing the elastic member, the second end of the elastic member abuts against the second side surface, and the first side surface is used for limiting cooperation with the medicine chamber of the syringe.

[0010] In some embodiments, a slide groove extending along the axial direction of the third sleeve is provided on the outer wall surface of the third sleeve, and a slider slidably matched with the slide groove is provided on the inner wall surface of the second sleeve; or,

[0011] A sliding groove extending along the axial direction of the second sleeve is provided on the inner wall surface of the second sleeve, and a sliding block slidably matched with the sliding groove is provided on the outer wall surface of the third sleeve.

[0012] In some embodiments, the third sleeve is movably installed outside the second sleeve along the axial direction of the second sleeve, and the elastic member is located between the second sleeve and the third sleeve.

[0013] In some embodiments, the inner wall surface of the third sleeve is provided with a limiting convex portion, and the end surface of the second sleeve close to the limiting convex portion is provided with an annular groove, one end of the elastic member is in the annular groove, and the other end of the elastic member abuts against the limiting convex portion;

[0014] Wherein, a slide groove extending along the axial direction of the second sleeve is provided on the outer wall surface of the second sleeve, and a slider slidably matched with the slide groove is provided on the inner wall surface of the third sleeve; or,

[0015] A sliding groove extending along the axial direction of the third sleeve is provided on the inner wall surface of the third sleeve, and a sliding block slidably matched with the sliding groove is provided on the outer wall surface of the second sleeve.

[0016] In some embodiments, an inner wall surface of the elastic arm is provided with an extrusion protrusion, and at least two of the extrusion protrusions on the same elastic arm are arranged at intervals along the axial direction of the first sleeve.

[0017] In some embodiments, an outer wall surface of the first sleeve is provided with an external thread, an inner wall surface of the second sleeve is provided with an internal thread, and the second sleeve is threadedly connected to the first sleeve.

[0018] In some embodiments, the outer wall surface of the first sleeve is further provided with a guide protrusion, the guide protrusion is located at the thread termination end of the external thread, and the guide protrusion has a guide inclined surface for guiding the second sleeve to be sleeved on the first sleeve.

[0019] In some embodiments, the pressing portion is an annular protrusion, and the inner diameter of the pressing portion is smaller than the diameter of the circle where the outer wall surface of the guiding protrusion is located.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 is a schematic structural diagram of a first state of a syringe auxiliary device provided in some embodiments of the present application;

[0023] Figure 2 yes Figure 1 a cross-sectional view of the syringe auxiliary device shown;

[0024] Figure 3 yes Figure 2 A partial enlarged view of the syringe auxiliary device shown;

[0025] Figure 4 yes Figure 2 A schematic diagram of the structure of the first sleeve;

[0026] Figure 5 yes Figure 4 a cross-sectional view of the first sleeve shown;

[0027] Figure 6 yes Figure 2 A schematic diagram of the structure of the second sleeve;

[0028] Figure 7 yes Figure 6 a cross-sectional view of the second sleeve shown;

[0029] Figure 8 yes Figure 2 A schematic diagram of the structure of the third sleeve;

[0030] Fig. 9 is a schematic structural diagram of a second state of a syringe auxiliary device provided in some embodiments of the present application;

[0031] Fig.10 is a partial enlarged view of a syringe auxiliary device provided in some other embodiments of the present application;

[0032] Fig.11 It is a partial enlarged view of a syringe auxiliary device provided in some other embodiments of the present application.

[0033] The meanings of the marks in the figure are:

[0034] 10. Syringe auxiliary device;

[0035] 11. first sleeve; 111. elastic arm; 1111. extrusion convex portion; 112. limiting convex portion; 1121. first side surface; 1122. second side surface; 113. external thread; 114. guide convex portion; 1141. guide inclined surface; 115. long through hole; 116. short through hole;

[0036] 12. second sleeve; 121. pressing portion; 122. slider; 123. first annular rib; 124. internal thread; 125. second annular rib;

[0037] 13. third sleeve; 131. annular groove; 132. slide groove; 133. stopper; 1331. mounting slope;

[0038] 14. elastic member; 141. first end; 142. second end;

[0039] 20. Medicine room;

[0040] 21. Needle;

[0041] 22. Needle cap. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] The embodiment of the present application provides a syringe auxiliary device. Figure 1 and Figure 2 The syringe auxiliary device 10 includes a first sleeve 11, a second sleeve 12, a third sleeve 13 and an elastic member 14. The first sleeve 11 includes a plurality of elastic arms 111 arranged at intervals along the circumference thereof; the second sleeve 12 includes a pressing portion 121, the second sleeve 12 is sleeved and fixed on the first sleeve 11, and the pressing portion 121 presses the plurality of elastic arms 111 so that the plurality of elastic arms 111 press the medicine chamber 20 of the syringe; the third sleeve 13 is movably installed on the first sleeve 11 or the second sleeve 12 along the axial direction of the medicine chamber 20; the elastic member 14 applies elastic force to the third sleeve 13 so that the third sleeve 13 covers the needle 21 after the syringe auxiliary device 10 is installed on the medicine chamber 20.

[0051] The first sleeve 11 is a cylindrical structure with two ends open. The axial direction of the first sleeve 11 is consistent with the axial direction of the medicine chamber 20. The first sleeve 11 is used to be mounted on and fixed on the medicine chamber 20. Figure 2 Direction indicated by the arrow.

[0052] The first sleeve 11 includes a plurality of elastic arms 111 arranged at intervals along its circumference. Figure 4, that is, a long through hole 115 is provided between two adjacent elastic arms 111. With this design, when the multiple elastic arms 111 are squeezed and moved toward the center line of the first sleeve 11, no interference occurs between the two adjacent elastic arms 111, which is conducive to the movement of the elastic arms 111 toward the first sleeve 11. The number of elastic arms 111 can be set as needed, for example, two, three, or four or more elastic arms 111 are provided.

[0053] It is understandable that the length and width of each elastic arm 111 can also be set as needed, as long as the elastic arm 111 can clamp the medicine chamber 20. The length direction of the elastic arm 111 refers to the axial direction of the first sleeve 11, and the width direction of the elastic arm 111 refers to the circumferential direction of the first sleeve 11.

[0054] It can be understood that the elastic arm 111 can be integrally formed with the first sleeve 11, so that the processing of the elastic arm 111 is relatively convenient; of course, the elastic arm 111 can also be fixed (including but not limited to snap-fitting, interference connection, riveting, etc.) on the first sleeve 11.

[0055] Optionally, the elastic arm 111 has a certain curvature in the circumferential direction of the first sleeve 11, that is, multiple elastic arms 111 can form a circular cavity connected to the long through hole 115 to be suitable for the cylindrical medicine chamber 20; of course, the elastic arm 111 may also have no curvature, that is, the elastic arm 111 is a straight arm.

[0056] The second sleeve 12 is a cylindrical structure with two ends opened. The axial direction of the second sleeve 12 is consistent with the axial direction of the medicine chamber 20 . The second sleeve 12 is used to be sleeved on the first sleeve 11 .

[0057] The present application does not limit the manner in which the second sleeve 12 is fixed to the first sleeve 11. For example, the second sleeve 12 may be threadedly connected to the first sleeve 11; or the second sleeve 12 may be clamped to the first sleeve 11; or the second sleeve 12 may be interference connected to the first sleeve 11.

[0058] Optionally, the pressing portion 121 is arranged on the inner wall surface of the second sleeve 12; it can be understood that the pressing portion 121 can be at the end of the second sleeve 12, or, the pressing portion 121 can also be in the middle or close to the middle of the second sleeve 12, as long as the pressing portion 121 can effectively push the elastic arm 111.

[0059] It can be understood that the pressing portion 121 may be an annular protrusion or a C-shaped protrusion; or, the pressing portion 121 may include a plurality of dot-shaped protrusions arranged at intervals along the circumference of the second sleeve 12 .

[0060] It can be understood that the pressing portion 121 can be integrally formed with the second sleeve 12, so that the processing of the pressing portion 121 is relatively convenient; of course, the pressing portion 121 can also be fixed (including but not limited to snap-fitting, interference connection, riveting, etc.) on the second sleeve 12.

[0061] The third sleeve 13 is a cylindrical structure with two ends open, and the axial direction of the third sleeve 13 is consistent with the axial direction of the medicine chamber 20. The third sleeve 13 is movably mounted on the first sleeve 11 or the second sleeve 12 along the axial direction of the medicine chamber 20. It can be understood that the third sleeve 13 can be mounted inside or outside the first sleeve 11 and can reciprocate along the axial direction of the medicine chamber 20 in the first sleeve 11; or, the third sleeve 13 is mounted inside or outside the second sleeve 12 and can reciprocate along the axial direction of the medicine chamber 20 in the second sleeve 12.

[0062] It can be understood that the elastic member 14 can be located between the third sleeve 13 and the first sleeve 11 ; or, the elastic member 14 can be located between the third sleeve 13 and the second sleeve 12 ; or, the elastic member 14 can also be located between the third sleeve 13 and the medicine chamber 20 .

[0063] The elastic member 14 may be a spring, rubber or the like.

[0064] The working principle of the syringe auxiliary device 10 provided in the embodiment of the present application is as follows: before injection, the syringe with the needle 21 and the needle cap 22 is first inserted into the first sleeve 11 of the preliminarily assembled syringe auxiliary device 10. After the insertion is in place, the elastic arm 111 of the first sleeve 11 clamps the medicine chamber 20 by screwing the second sleeve 12, so that the syringe auxiliary device 10 is fixed on the syringe; and under the elastic force of the elastic member 14, the third sleeve 13 can cover the needle 21, such as Figure 2 When injecting, the needle cap 22 is removed, the needle 21 can be hidden in the third sleeve 13, and the third sleeve 13 is pressed against the skin. During the process of pressing the syringe, the third sleeve 13 gradually compresses the elastic member 14 so that the needle 21 is inserted into the skin, thereby performing the injection. Fig. 9 As shown; when the needle 21 is pulled out, the third sleeve 13 covers the needle 21 again under the elastic force of the elastic member 14, thereby achieving a protective effect, avoiding the potential risk of secondary infection of the self-injector or infection caused by others being pricked by the needle 21, and avoiding the spread of the disease.

[0065] The syringe auxiliary device 10 provided in the embodiment of the present application includes a first sleeve 11 and a second sleeve 12. When the second sleeve 12 is sleeved and fixed on the first sleeve 11, the pressing portion 121 of the second sleeve 12 can press the multiple elastic arms 111 of the first sleeve 11, so that the multiple elastic arms 111 press the medicine chamber 20, thereby fixing the syringe auxiliary device 10 on the syringe; since the syringe auxiliary device 10 is installed by using the elastic arms 111 to press the medicine chamber 20, the syringe auxiliary device 10 can be installed on various types of syringes, such as insulin syringes, simple syringes, etc. The syringe auxiliary device 10 further includes a third sleeve 13 and an elastic member 14, wherein the third sleeve 13 is movably mounted on the first sleeve 11 or the second sleeve 12 along the axial direction of the drug chamber 20; before injection, the elastic member 14 applies elastic force to the third sleeve 13 so that the third sleeve 13 covers the needle 21 to prevent the needle 21 from being exposed; during injection, the skin pushes the third sleeve 13 so that the third sleeve 13 compresses the elastic member 14, so that the needle 21 is gradually inserted into the skin. Since the patient cannot see the needle 21 during the above process, fear of the patient when seeing the needle 21 is avoided, the success rate of injection is guaranteed, and the injection effect is improved.

[0066] Please also refer to Figure 2 , Figure 3 and Figure 7 In some embodiments, the third sleeve 13 is movably installed in the second sleeve 12 along the axial direction of the second sleeve 12 , and the elastic member 14 is located between the first sleeve 11 and the third sleeve 13 .

[0067] Optionally, the third sleeve 13 may be a cylindrical sleeve, and the end of the second sleeve 12 away from the pressing portion 121 (i.e. Figure 7 The inner wall surface of the third sleeve 13 is provided with a first annular rib 123, and the inner diameter of the first annular rib 123 is the same as the outer diameter of the third sleeve 13, so as to ensure that the third sleeve 13 will not deflect in the second sleeve 12 along the axial direction of the second sleeve 12. At the same time, the third sleeve 13 is close to the elastic member 14 (i.e. Figure 8 A stopper is provided on the outer wall surface of the upper end of the sleeve 12, which can prevent the third sleeve 13 from escaping from the second sleeve 12 under the elastic force of the elastic member 14.

[0068] Optionally, the third sleeve 13 can be a conical sleeve, and a first annular rib 123 is provided on the inner wall surface of one end of the second sleeve 12 away from the top pressing portion 121, the diameter of one end of the third sleeve 13 inside the second sleeve 12 is larger than the inner diameter of the first annular rib 123, and the diameter of one end of the third sleeve 13 outside the second sleeve 12 is smaller than the inner diameter of the first annular rib 123, so that the third sleeve 13 will not fall out of the second sleeve 12 under the elastic force of the elastic member 14.

[0069] In other embodiments, Fig.10As shown, the third sleeve 13 is movably installed in the first sleeve 11 along the axial direction of the first sleeve 11 , and the elastic member 14 is located between the first sleeve 11 and the third sleeve 13 .

[0070] Please also refer to Figure 3 , Figure 5 and Figure 8 In some embodiments, an annular groove 131 is provided on the end surface of one end of the third sleeve 13, and the elastic member 14 has a first end 141 and a second end 142 along its axial direction, and the first end 141 of the elastic member 14 is in the annular groove 131; a limiting protrusion 112 is provided on the inner wall of the first sleeve 11, and the limiting protrusion 112 has a first side surface 1121 facing away from the elastic member 14 and a second side surface 1122 facing the elastic member 14, and the second end 142 of the elastic member 14 abuts against the second side surface 1122, and the first side surface 1121 is used for limiting cooperation with the medicine chamber 20 of the syringe.

[0071] The end surface where the annular groove 131 is located refers to the end surface of the third sleeve 13 facing the elastic member 14 .

[0072] It can be understood that the elastic member 14 can be a coil spring, a cylindrical rubber, etc.

[0073] It can be understood that the annular groove 131 can be formed by the concave end surface of the third sleeve 13, that is, the bottom wall of the annular groove 131 is lower than the end surface of the third sleeve 13; or, the end surface of the third sleeve 13 is provided with two annular ribs, and the two annular ribs surround the annular groove 131, that is, the bottom wall of the annular groove 131 is flush with the end surface of the third sleeve 13. Among them, the elastic member 14 is sleeved outside the needle head 21, and the first end 141 of the elastic member 14 is in the annular groove 131. The annular groove 131 can limit the first end 141 to prevent the first end 141 from moving in a direction perpendicular to the axial direction of the third sleeve 13, which is conducive to ensuring the stability of the elastic member 14 during the telescopic process. In other embodiments, the annular groove 131 may not be provided, and an annular step may be provided on the end surface of one end of the third sleeve 13, and the first end 141 of the elastic member 14 is located on the annular step, and the annular step may limit the first end 141; or, the annular groove 131 may not be provided, and a plurality of positioning grooves may be provided on the end surface of one end of the third sleeve 13, and the plurality of positioning grooves are arranged at intervals along the circumference of the third sleeve 13, and the elastic member 14 includes a plurality of coil springs, and the plurality of coil springs are arranged at intervals along the circumference of the third sleeve 13, and one end of each coil spring is located in the corresponding positioning groove.

[0074] It can be understood that the limiting protrusion 112 can be integrally formed with the first sleeve 11, so that the processing of the limiting protrusion 112 is relatively convenient; of course, the limiting protrusion 112 can also be fixed on the first sleeve 11 (including but not limited to snap-on, interference connection, bonding, riveting, etc.).

[0075] It can be understood that the limiting protrusion 112 can be an annular protrusion or a C-shaped protrusion; or, the limiting protrusion 112 can also include a plurality of dot-shaped protrusions arranged at intervals along the circumference of the first sleeve 11 .

[0076] Optionally, the first side surface 1121 is an inclined surface to match the end surface of the drug chamber 20 close to the needle 21. The second side surface 1122 is a plane.

[0077] The first side surface 1121 is limitedly matched with the end surface of the medicine chamber 20 close to the needle 21 to ensure the accuracy of the installation position of the first sleeve 11 on the medicine chamber 20. At the same time, the second end 142 of the elastic member 14 abuts against the second side surface 1122, so that the elastic member 14 is limited between the first sleeve 11 and the third sleeve 13, and the elastic member 14 is prevented from falling out of the first sleeve 11.

[0078] In other embodiments, the limiting protrusion 112 may not be provided, and the upper end of the elastic member 14 directly abuts against the end surface of the medicine chamber 20 close to the needle 21 .

[0079] Please also refer to Figure 3 , Figure 6 and Figure 8 In some embodiments, a slide groove 132 extending along the axial direction of the third sleeve 13 is provided on the outer wall surface of the third sleeve 13 , and a slider 122 slidably matched with the slide groove 132 is provided on the inner wall surface of the second sleeve 12 .

[0080] Among them, one or more slide grooves 132 can be set, and correspondingly, one or more sliders 122 are set; when there are multiple slide grooves 132, the multiple slide grooves 132 are arranged at intervals along the circumference of the third sleeve 13, and the multiple sliders 122 are arranged at intervals along the circumference of the second sleeve 12.

[0081] Optionally, two slide grooves 132 are provided and arranged symmetrically with respect to the center, and two sliders 122 are provided and arranged symmetrically with respect to the center.

[0082] It is understandable that the first annular rib 123 may be provided on the inner wall surface of the second sleeve 12 , and the slider 122 may be provided on the inner wall surface of the first annular rib 123 ; or, the first annular rib 123 may not be provided, and the slider 122 may be directly provided on the inner wall surface of the second sleeve 12 .

[0083] Optionally, a stopper 133 is provided at one end of the slide groove 132, and a side of the stopper 133 facing the elastic member 14 is a mounting inclined surface 1331. The stopper 133 is equivalent to the above-mentioned stopper, and the stopper 133 cooperates with the slider 122 to prevent the third sleeve 13 from being disengaged from the second sleeve 12 under the elastic force of the elastic member 14. The number of the stopper 133, the slider 122 and the slide groove 132 is the same.

[0084] Optionally, the end of the slide groove 132 away from the elastic member 14 is not through, which can prevent the third sleeve 13 from entering the second sleeve 12 under external force and not cover the needle 21 under the elastic force of the elastic member 14.

[0085] By adopting the above technical solution, the sliding groove 132 and the slider 122 are slidably matched, so that the third sleeve 13 can only move in its axial direction without rotating, which is beneficial to the reciprocating movement of the third sleeve 13 on the second sleeve 12; at the same time, a mounting bevel 1331 is provided on the stopper 133, which is beneficial for the slider 122 to enter the sliding groove 132.

[0086] In other embodiments, a slide groove 132 extending along the axial direction of the second sleeve 12 may be provided on the inner wall surface of the second sleeve 12, and a slider 122 slidably matched with the slide groove 132 may be provided on the outer wall surface of the third sleeve 13; alternatively, the slide groove 132 and the slider 122 may not be provided, in which case the third sleeve 13 may both move along its axial direction and rotate.

[0087] In other embodiments, when the end of the slide groove 132 away from the elastic member 14 is through, the mounting inclined surface 1331 may not be provided on the stopper 133 , and the slider 122 may be installed into the slide groove 132 from the end of the slide groove 132 away from the elastic member 14 .

[0088] Please refer to Fig.11 The third sleeve 13 is movably installed outside the second sleeve 12 along the axial direction of the second sleeve 12 , and the elastic member 14 is located between the second sleeve 12 and the third sleeve 13 .

[0089] Optionally, a limiting protrusion is provided on the inner wall surface of the third sleeve 13, an annular groove is provided on one end surface of the second sleeve 12 close to the limiting protrusion, one end of the elastic member 14 is in the annular groove, and the other end of the elastic member 14 abuts against the limiting protrusion.

[0090] Optionally, a slide groove extending along the axial direction of the second sleeve 12 is provided on the outer wall surface of the second sleeve 12, and a slider slidably matched with the slide groove is provided on the inner wall surface of the third sleeve 13. In other embodiments, a slide groove extending along the axial direction of the third sleeve 13 is provided on the inner wall surface of the third sleeve 13, and a slider slidably matched with the slide groove is provided on the outer wall surface of the second sleeve 12.

[0091] Please also refer to Figure 4 and Figure 5 In some embodiments, an inner wall surface of the elastic arm 111 is provided with an extrusion protrusion 1111 , and at least two extrusion protrusions 1111 on the same elastic arm 111 are arranged at intervals along the axial direction of the first sleeve 11 .

[0092] The elastic arm 111 clamps the medicine chamber 20 by squeezing the protrusion 1111 .

[0093] It can be understood that the extrusion protrusion 1111 can be integrally formed with the elastic arm 111, so that the processing of the extrusion protrusion 1111 is relatively convenient; of course, the extrusion protrusion 1111 can also be fixed (including but not limited to snap-on, interference connection, bonding, riveting, etc.) on the elastic arm 111.

[0094] The shape of the extrusion convex portion 1111 is not limited in this application. For example, the extrusion convex portion 1111 may be a straight-line structure, a broken-line structure, or a hemispherical structure. When the extrusion convex portion 1111 is a straight-line structure, the extrusion convex portion 1111 may extend along the circumference of the first sleeve 11, that is, the extrusion convex portion 1111 is perpendicular to the axis of the first sleeve 11; or, the extrusion convex portion 1111 may also extend along the axial direction of the first sleeve 11, that is, the extrusion convex portion 1111 is parallel to the axis of the first sleeve 11; the extrusion convex portion 1111 may also be arranged obliquely, that is, the skew angle between the extrusion convex portion 1111 and the axis of the first sleeve 11 is 0-90°.

[0095] Among them, a side of the extrusion protrusion 1111 away from the third sleeve 13 is provided with a chamfer to facilitate the insertion of the medicine chamber 20 into the third sleeve 13.

[0096] It can be understood that two, three or more extrusion protrusions 1111 on the same elastic arm 111 can be arranged at intervals along the axial direction of the first sleeve 11 .

[0097] Optionally, the number of the extrusion protrusions 1111 on each elastic arm 111 is the same, for example, four elastic arms 111 are provided, eight extrusion protrusions 1111 are provided, and each elastic arm 111 is provided with two extrusion protrusions 1111. Of course, in other embodiments, the number of the extrusion protrusions 1111 on each elastic arm 111 may be different, or the number of the extrusion protrusions 1111 on each elastic arm 111 may be partially the same and partially different.

[0098] Squeezing the medicine chamber 20 by the extrusion protrusion 1111 is conducive to the elastic arm 111 clamping the medicine chamber 20; moreover, the length of the medicine chamber 20 is generally longer, and there are at least two extrusion protrusions 1111 on the same elastic arm 111 arranged at axial intervals along the first sleeve 11, which can further increase the stability of the elastic arm 111 after clamping the medicine chamber 20.

[0099] In other embodiments, the inner wall surface of the elastic arm 111 may be provided with one or no extrusion protrusion 1111 .

[0100] In some embodiments, the side of the extrusion protrusion 1111 that is used to contact the medicine chamber 20 of the syringe is provided with anti-slip grooves.

[0101] It can be understood that the anti-slip pattern can be a concave-convex structure, a strip structure or a dot structure, etc.

[0102] By adopting the above technical solution, the friction between the extrusion protrusion 1111 and the medicine chamber 20 can be increased, so that the extrusion protrusion 1111 is not easy to slide relative to the medicine chamber 20, further ensuring the stability of the elastic arm 111 after clamping the medicine chamber 20.

[0103] Please also refer to Figure 3 , Figure 5 and Figure 7 In some embodiments, an outer wall surface of the first sleeve 11 is provided with an external thread 113 , an inner wall surface of the second sleeve 12 is provided with an internal thread 124 , and the second sleeve 12 is threadedly connected to the first sleeve 11 .

[0104] Optionally, a second annular rib 125 is provided on the inner wall surface of the second sleeve 12 , the second annular rib 125 is located between the pressing portion 121 and the first annular rib 123 , and the internal thread 124 is located on the inner wall surface of the second annular rib 125 .

[0105] The length of the external thread 113 can be set as needed, for example, the length of the external thread 113 can be 10-20 mm, specifically, the length of the external thread 113 is 15 mm. The length of the internal thread 124 can be less than, equal to or greater than the length of the external thread 113.

[0106] Among them, the inner diameter of the pressing portion 121 is smaller than the diameter of the circle where the outer wall surface of the elastic arm 111 is located. When the second sleeve 12 is threadedly connected to the first sleeve 11, the pressing portion 121 can press the elastic arm 111 to make the elastic arm 111 deform toward the medicine chamber 20, thereby pressing it tightly on the medicine chamber 20, so as to fix the syringe auxiliary device 10 on the syringe.

[0107] By threading the second sleeve 12 onto the first sleeve 11 , it is convenient to assemble and disassemble the syringe auxiliary device 10 , so as to realize the recycling of the syringe auxiliary device 10 .

[0108] In other embodiments, the second sleeve 12 can be snap-fitted and fixed to the first sleeve 11 . For example, a snap-fitting protrusion is provided on the inner wall surface of the second sleeve 12 , and a snap-fitting groove matched with the snap-fitting protrusion is provided on the outer wall surface of the first sleeve 11 .

[0109] In some embodiments, a short through hole 116 is provided at one end of the first sleeve 11 away from the elastic arm 111, and a plurality of short through holes 116 are arranged at intervals along the circumference of the first sleeve 11; when the second sleeve 12 is sleeved on the first sleeve 11 through this end, this end of the first sleeve 11 can be contracted to facilitate the second sleeve 12 to be sleeved on the first sleeve 11.

[0110] The external thread 113 is located between the long through hole 115 and the short through hole 116 .

[0111] Optionally, two short through holes 116 are provided and arranged symmetrically with respect to the center.

[0112] Please refer to Figure 4 In some embodiments, the outer wall surface of the first sleeve 11 is further provided with a guide protrusion 114 , which is located at the thread termination end of the external thread 113 , and has a guide bevel 1141 for guiding the second sleeve 12 to be sleeved on the first sleeve 11 .

[0113] The thread termination end of the external thread 113 refers to the end where the thread termination line of the external thread 113 is located.

[0114] It can be understood that the guide protrusion 114 can be integrally formed with the first sleeve 11, so that the processing of the guide protrusion 114 is relatively convenient; of course, the guide protrusion 114 can also be fixed on the first sleeve 11 (including but not limited to snap-on, interference connection, bonding, riveting, etc.).

[0115] It is understood that one or more guide protrusions 114 can be provided. When there is one guide protrusion 114, the guide protrusion 114 is an annular protrusion or a C-shaped protrusion; when there are multiple guide protrusions 114, the multiple guide protrusions 114 are arranged at intervals along the circumference of the first sleeve 11.

[0116] Optionally, two guide protrusions 114 are provided and arranged symmetrically with respect to the center.

[0117] The guiding bevel 1141 is arranged toward the third sleeve 13 . Optionally, the included angle between the guiding bevel 1141 and the axis of the third sleeve 13 is 45°.

[0118] Optionally, the diameter of the circle where the outer wall surface of the guiding protrusion 114 is located is larger than the inner diameter of the second annular rib 125 , and when the second annular rib 125 of the second sleeve 12 is screwed onto the guiding protrusion 114 , it cannot be screwed further.

[0119] Guided by the guiding inclined surface 1141 on the guiding protrusion 114 , the guiding protrusion 114 can open the pressing portion 121 , so that the elastic arm 111 enters into the second sleeve 12 , thereby facilitating the second sleeve 12 to be sleeved on the first sleeve 11 .

[0120] In some embodiments, the pressing portion 121 is an annular convex portion, and the inner diameter of the pressing portion 121 is smaller than the diameter of the circle where the outer wall surface of the guiding protrusion 114 is located. During assembly, when the pressing portion 121 passes over the guiding protrusion 114, the pressing portion 121 can limit the guiding protrusion 114 in the direction of separation of the second sleeve 12 from the first sleeve 11, so that the second sleeve 12 and the first sleeve 11 are pre-assembled together and are not easy to separate.

[0121] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A syringe auxiliary device, characterized in that: It includes a first sleeve, a second sleeve, a third sleeve and an elastic member, the first sleeve includes a plurality of elastic arms arranged at intervals along its circumference; the second sleeve includes a pressing portion, the second sleeve is sleeved and fixed on the first sleeve, the pressing portion presses the plurality of elastic arms so that the plurality of elastic arms clamp the syringe; the third sleeve is movably installed on the first sleeve or the second sleeve along the axial direction of the syringe; the elastic member applies elastic force to the third sleeve so that the third sleeve covers the needle of the syringe after the syringe auxiliary device is installed on the syringe.

2. The syringe assisting device according to claim 1, characterized in that: The third sleeve is movably installed in the second sleeve along the axial direction of the second sleeve, and the elastic member is located between the first sleeve and the third sleeve.

3. The syringe assisting device according to claim 2, characterized in that: An annular groove is provided on one end surface of the third sleeve, and the elastic member has a first end and a second end along its axial direction, and the first end of the elastic member is located in the annular groove; A limiting protrusion is provided on the inner wall of the first sleeve, and the limiting protrusion has a first side surface facing away from the elastic member and a second side surface facing the elastic member, the second end of the elastic member abuts against the second side surface, and the first side surface is used for limiting cooperation with the medicine chamber of the syringe.

4. The syringe auxiliary device according to claim 3, characterized in that: The outer wall surface of the third sleeve is provided with a slide groove extending along the axial direction of the third sleeve, and the inner wall surface of the second sleeve is provided with a slider slidably matched with the slide groove; or, A sliding groove extending along the axial direction of the second sleeve is provided on the inner wall surface of the second sleeve, and a sliding block slidably matched with the sliding groove is provided on the outer wall surface of the third sleeve.

5. The syringe assisting device according to claim 1, characterized in that: The third sleeve is movably installed outside the second sleeve along the axial direction of the second sleeve, and the elastic member is located between the second sleeve and the third sleeve.

6. The syringe assisting device according to claim 5, characterized in that: The inner wall surface of the third sleeve is provided with a limiting convex portion, and the end surface of the second sleeve close to the limiting convex portion is provided with an annular groove, one end of the elastic member is located in the annular groove, and the other end of the elastic member abuts against the limiting convex portion; Wherein, a slide groove extending along the axial direction of the second sleeve is provided on the outer wall surface of the second sleeve, and a slider slidably matched with the slide groove is provided on the inner wall surface of the third sleeve; or, A sliding groove extending along the axial direction of the third sleeve is provided on the inner wall surface of the third sleeve, and a sliding block slidably matched with the sliding groove is provided on the outer wall surface of the second sleeve.

7. The syringe assisting device according to claim 1, characterized in that: The inner wall surface of the elastic arm is provided with an extrusion protrusion, and at least two of the extrusion protrusions on the same elastic arm are arranged at intervals along the axial direction of the first sleeve.

8. The syringe assisting device according to claim 1, characterized in that: The outer wall surface of the first sleeve is provided with an external thread, the inner wall surface of the second sleeve is provided with an internal thread, and the second sleeve is threadedly connected to the first sleeve.

9. The syringe assisting device according to claim 8, characterized in that: The outer wall surface of the first sleeve is further provided with a guiding protrusion, the guiding protrusion is located at the thread termination end of the external thread, and the guiding protrusion has a guiding inclined surface for guiding the second sleeve to be sleeved on the first sleeve.

10. The syringe assisting device according to claim 9, characterized in that: The pressing portion is an annular convex portion, and the inner diameter of the pressing portion is smaller than the diameter of the circle where the outer wall surface of the guiding convex portion is located.

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