Auto-injector and its actuation assembly

Abstract

The present invention relates to an actuating assembly of an auto-injector, which is used to be combined with a containing assembly equipped with a medicine bottle. The actuating assembly of the auto-injector includes: an actuating sleeve, an actuating rod sleeve, a first elastic member, a rear cover, a push rod, and a second elastic member. The whole actuating assembly corresponds to an axis. Through the symmetric two cantilevers of the actuating rod sleeve and the structural design of corresponding components, the actuating sleeve is not only used to control the movement of the push rod before and after being actuated, but also provides a sound during assembly to remind whether the assembly is in place and the end of auto-injection. Accordingly, when the actuating sleeve is actuated, it can urge the push rod to move towards the medicine bottle to achieve the effect of auto-injection.

Description

Technical Field

[0001] The present invention relates to an actuating assembly of an auto - injector, in particular to an actuating assembly of an auto - injector capable of actuating a mounted vial to perform an injection. The present invention also relates to an auto - injector using the above - mentioned actuating assembly.

Background Art

[0002] In the past, when patients had a need for drug injection, they always needed the assistance of medical staff to perform the injection procedure. With the progress of medical technology, auto - injection needles that can be operated by patients themselves have been widely used. Patients only need to operate the auto - injection needle with one hand to complete the drug injection, which reduces the consumption of medical manpower and resources, and improves the convenience and flexibility of injection.

[0003] However, in order to achieve the purpose of being easy to operate and capable of performing auto - injection, the existing auto - injection needles are often too complex in structural design, resulting in the disadvantage that such needles are not conducive to assembly and cause an increase in manufacturing costs. Therefore, how to simplify the structure and quantity of assembled parts, reduce the assembly difficulty of auto - injection needles, and be more user - friendly is indeed a research topic worthy of study.

Summary of the Invention

[0004] The present invention is made in view of the above problems, and its purpose is to provide an auto - injector and its actuating assembly, which can simplify the structural design, improve the convenience of assembly, and meet the medical regulatory standards during the assembly and injection processes.

[0005] The actuating assembly of the auto - injector of the present invention includes an actuating sleeve, an actuating rod sleeve, a first elastic member, a rear cover, a push rod, and a second elastic member. The actuating sleeve includes a channel; the actuating rod sleeve is movably disposed in the channel along an axis, the actuating rod sleeve includes two symmetric cantilevers, and each cantilever includes a fastening portion; two ends of the first elastic member respectively abut against the actuating sleeve and the actuating rod sleeve; the rear cover is coupled to one end of the actuating rod sleeve; the push rod is movably disposed in the actuating rod sleeve along the axis, the push rod includes two grooves; and two ends of the second elastic member respectively abut against the rear cover and the push rod. When the cantilevers of the actuating rod sleeve are restricted in the channel of the actuating sleeve, the fastening portions of the cantilevers are snapped into the grooves of the push rod to restrict the movement of the push rod; when the actuating sleeve moves relative to the actuating rod sleeve along the axis direction, the first elastic member is gradually compressed, so that the fastening portions of the cantilevers of the actuating rod sleeve are disengaged from the grooves of the push rod, and the push rod is actuated by the compressed second elastic member to move towards the vial.

[0006] In an embodiment of the present invention, the actuating sleeve includes a flange portion disposed on the outer surface of the actuating sleeve, and the actuating rod sleeve further includes a plurality of abutting portions; two ends of the first elastic member respectively abut against the flange portion of the actuating sleeve and the plurality of abutting portions of the actuating rod sleeve.

[0007] In one embodiment of the present invention, the actuating sleeve further includes a plurality of grooves, and a plurality of locking portions of the actuating sleeve pass through the plurality of grooves to protrude from the outer surface of the actuating sleeve, and when the actuating sleeve moves relative to the actuating sleeve, the plurality of locking portions move along the plurality of grooves.

[0008] In one embodiment of the present invention, the actuating sleeve further includes a plurality of fastening portions, and the rear cover further includes a plurality of fastening members correspondingly fastened to the plurality of fastening portions.

[0009] In one embodiment of the present invention, the rear cover further includes a plurality of guiding members, and the actuating sleeve further includes a plurality of corresponding guiding members; when the rear cover moves relative to the actuating sleeve, the rear cover moves along the axis relative to the actuating sleeve by the cooperation of the plurality of guiding members and the plurality of corresponding guiding members.

[0010] In one embodiment of the present invention, the actuating sleeve further includes at least one stop structure, and at least one stop structure protrudes from the surface of the channel.

[0011] In one embodiment of the present invention, each cantilever further includes an outwardly expanding portion correspondingly snapped into at least one stop structure.

[0012] In one embodiment of the present invention, the actuating sleeve further includes at least one auxiliary mounting hole, and at least one auxiliary mounting hole penetrates from the outer surface of the actuating sleeve to the channel, and at least one auxiliary mounting hole is located between one end of the actuating sleeve adjacent to the rear cover and at least one stop structure.

[0013] The automatic syringe of the present invention includes the actuating assembly and the accommodating assembly as described above. The accommodating assembly is coupled to one end of the actuating assembly, and the accommodating assembly includes an outer housing, a vial sleeve, and a needle cap. The vial sleeve is coupled to the outer housing for mounting a vial; the needle cap penetrates and partially exposes outside the outer housing, and the needle cap is movable relative to the outer housing and the vial sleeve. When the needle cap is moved toward the outer housing by an external force, the actuating sleeve of the actuating assembly is pushed by the needle cap, so that the two locking portions of the two cantilevers of the actuating sleeve are disengaged from the grooves of the push rod, and then the push rod is actuated by the compressed second elastic member, and the push rod is urged to move toward the vial to complete the injection.

[0014] In one embodiment of the present invention, the automatic syringe further includes a gasket, and the gasket is disposed at one end of the vial sleeve adjacent to the actuating assembly.

[0015] According to the automatic syringe and its actuating assembly of the present invention, through the structural design of the symmetric two cantilevers of the actuating sleeve and the corresponding components, the structural design of each component can be effectively simplified, the convenience of assembly can be improved, and a sound can be emitted during the assembly and injection processes to prompt that the assembly and injection are in place and the automatic injection is completed, meeting the medical regulatory standards for the assembly and injection processes.

[0016] The specific technology adopted by the present invention will be further described through the following embodiments and the accompanying drawings. [Description of the Drawings]

[0017] Figure 1 It is an exploded view of the actuation assembly of the auto-injector of the present invention.

[0018] Figure 2 It is a schematic view of the actuation assembly of the auto-injector of the present invention.

[0019] Figure 3 It is a cross-sectional view of the actuation sleeve of the actuation assembly of the auto-injector of the present invention passing through the execution sleeve.

[0020] Figure 4 It is an exploded view of the auto-injector of the present invention.

[0021] Figure 5 It is a schematic view of the auto-injector of the present invention.

[0022] Figure 6 It is an exploded view of the accommodation assembly of the auto-injector of the present invention.

[0023] Main component symbol description:

[0024] 1 Auto-injector

[0025] 10 Actuation assembly

[0026] 11 Actuation sleeve

[0027] 111 Channel

[0028] 112 Flange portion

[0029] 113 Groove

[0030] 114 Engagement portion

[0031] 115 Auxiliary mounting hole

[0032] 116 Stop structure

[0033] 12 Execution sleeve

[0034] 121 Cantilever

[0035] 1211 Clamping portion

[0036] 1212 Expanding portion

[0037] 122 Latching portion

[0038] 123 Buckling portion

[0039] 124 Guiding structure

[0040] 13 First elastic member

[0041] 14 Rear cover

[0042] 141 Buckling member

[0043] 142 Corresponding guiding structure

[0044] 143 Positioning member

[0045] 15 Push rod

[0046] 151 Groove

[0047] 16 Second elastic member

[0048] 20 Accommodating assembly

[0049] 21 Outer housing

[0050] 211 Buckling hole

[0051] 212 Inspection hole

[0052] 22 Medicine bottle sleeve

[0053] 221 Inspection part

[0054] 23 Needle cap

[0055] 231 Slide groove

[0056] 232 Corresponding engaging part

[0057] 24 Gasket ring

[0058] 30 Medicine bottle

[0059] L Axis

Detailed implementation manners

[0060] To fully understand the purpose, features and effects of the present invention, the present invention will be described in detail below by means of the following specific embodiments in conjunction with the accompanying drawings. The description is as follows.

[0061] In the present invention, "a" or "an" is used to describe the units, elements and components described herein. This is only for convenience of description and provides a general meaning to the scope of the present invention. Therefore, unless otherwise clearly indicated, such description should be understood to include one, at least one, and the singular also includes the plural.

[0062] In the present invention, the terms "comprising", "including", "having", "containing" or any other similar terms are intended to cover non-exclusive inclusions. For example, an element, structure, article or device containing a plurality of components is not limited to only these components listed herein, but may include other components that are not explicitly listed but are normally inherent in the element, structure, article or device. In addition, unless there is a clear contrary indication, the term "or" refers to an inclusive "or", rather than an exclusive "or".

[0063] The actuation assembly of the auto-injector of the present invention is used to be combined with the accommodation assembly equipped with a medicine bottle, and the medicine bottle is actuated through the actuation assembly to perform an injection operation towards the user. Please first refer to Figure 1 and Figure 2 , wherein Figure 1 is an exploded view of the actuation assembly of the auto-injector of the present invention, Figure 2 is a schematic view of the actuation assembly of the auto-injector of the present invention. As shown in Figure 1 and Figure 2 , the actuation assembly 10 of the auto-injector of the present invention includes an actuation sleeve 11, an execution sleeve 12, a first elastic member 13, a rear cover 14, a push rod 15 and a second elastic member 16. The entire actuation assembly 10 corresponds to an axis L, such that the movable components of the actuation assembly 10 move relative to other components along the direction of the axis L. The actuation sleeve 11, the execution sleeve 12, the rear cover 14 and the push rod 15 can be made of the same or different strong materials, such as plastic materials, metals or alloys, etc., while the first elastic member 13 and the second elastic member 16 can be made of metals or alloys. In terms of structural design, the actuation sleeve 11, the execution sleeve 12 and the push rod 15 are all similar to tubular members in appearance, such that the hollow parts of the foregoing components can accommodate corresponding components, but the present invention is not limited thereto.

[0064] The actuation sleeve 11 includes a channel 111 and a flange portion 112. The channel 111 penetrates from one end of the actuation sleeve 11 to the other end for passing through components such as the execution sleeve 12. The flange portion 112 is provided on the outer surface of the actuation sleeve 11, and the flange portion 112 protrudes from the outer surface by a sufficient height for abutting against the first elastic member 13.

[0065] The actuation sleeve 11 further includes a plurality of grooves 113 and a plurality of engaging portions 114. Each groove 113 is a semi-open groove, that is to say, each groove 113 extends from one end of the actuation sleeve 11 towards the other end but does not reach the other end. Here, the plurality of grooves 113 are two symmetrically arranged grooves, but the number and positions of the plurality of grooves 113 are not limited thereto. The plurality of engaging portions 114 are provided at the opposite ends of the actuation sleeve 11 where the plurality of grooves 113 are formed for interlocking with the foregoing accommodation assembly. Here, the plurality of engaging portions 114 are two symmetrically arranged bumps, but the number and positions of the plurality of engaging portions 114 are not limited thereto.

[0066] In an embodiment of the present invention, the actuating sleeve 11 further includes at least one auxiliary mounting hole 115, and each auxiliary mounting hole 115 penetrates from the outer surface of the actuating sleeve 11 to the channel 111. At least one auxiliary mounting hole 115 provides a path for an external tool to assist in threading the actuating sleeve 12. Here, at least one auxiliary mounting hole 115 is two symmetrically arranged openings, but the number and position of at least one auxiliary mounting hole 115 are not limited thereto.

[0067] The actuating sleeve 12 is movably inserted along the axis L into the channel 111 of the actuating sleeve 11. The actuating sleeve 12 includes two symmetric cantilevers 121, which control the movement of the push rod before and after the actuating sleeve 11 is actuated. Each cantilever 121 extends substantially along the direction of the axis L, and one end of each cantilever 121 is connected to the main body of the actuating sleeve 12 to form a fulcrum, and the other end is a free end, so that it can swing based on the fulcrum to change the distance from the axis L. Each cantilever 121 includes a clamping portion 1211 and an outwardly extending portion 1212 provided at the aforementioned free end, wherein the clamping portion 1211 extends in a direction approaching the axis L, and the outwardly extending portion 1212 extends in a direction away from the axis L and parallel to the axis L, so that the actuating sleeve 12 has the minimum cross-sectional diameter length of the actuating sleeve 12 in the surrounding area at the position where the clamping portion 1211 is located in the direction perpendicular to the axis L, and has the maximum cross-sectional diameter length of the actuating sleeve 12 in the surrounding area at the position where the outwardly extending portion 1212 is located in the direction perpendicular to the axis L. Here, the clamping portion 1211 is a convex block, and the outwardly extending portion 1212 forms a structure with a tip shape along the direction of the axis L.

[0068] The actuating sleeve 12 further includes a plurality of abutting portions 122. The plurality of abutting portions 122 are provided on the outer surface of the actuating sleeve 12, and the plurality of abutting portions 122 protrude from the outer surface by a sufficient height for abutting against the first elastic member 13. In an embodiment of the present invention, when the actuating sleeve 12 is inserted into the channel 111 of the actuating sleeve 11, the plurality of abutting portions 122 of the actuating sleeve 12 pass through the plurality of grooves 113 to protrude from the outer surface of the actuating sleeve 11, and when the actuating sleeve 12 moves relative to the actuating sleeve 11, the plurality of abutting portions 122 move along the plurality of grooves 113.

[0069] In an embodiment of the present invention, the actuating sleeve 12 further includes a plurality of fastening portions 123. The plurality of fastening portions 123 are disposed at one end of the combined rear cover 14 for fastening the rear cover 14. Here, the plurality of fastening portions 123 are a plurality of symmetrically arranged stoppers, and each stopper forms an inclined surface structure on the side facing the rear cover 14. However, the number and position of the plurality of fastening portions 123 are not limited thereto. A plurality of engaging portions 114 are disposed at the opposite ends of the actuating sleeve 11 where a plurality of grooves 113 are formed for engaging the aforementioned accommodating assembly. Here, the plurality of engaging portions 114 are two symmetrically arranged stoppers. However, the number and position of the plurality of engaging portions 114 are not limited thereto.

[0070] The actuating sleeve 12 further includes a plurality of guiding structures 124. The plurality of guiding structures 124 are disposed at one end of the actuating sleeve 12 where the rear cover 14 is combined. Here, the plurality of guiding structures 124 are two semi-open grooves arranged symmetrically, and each groove extends from the end of the actuating sleeve 12 in a direction parallel to the axis L. However, the number and position of the plurality of guiding structures 124 are not limited thereto.

[0071] Both ends of the first elastic member 13 respectively abut against the actuating sleeve 11 and the actuating sleeve 12. In an embodiment of the present invention, both ends of the first elastic member 13 respectively abut against the flange portion 112 of the actuating sleeve 11 and the plurality of abutting portions 122 of the actuating sleeve 12, and the cross-sectional diameter length of the first elastic member 13 is greater than the minimum cross-sectional diameter length of the outer surfaces of the sleeve 11 and the actuating sleeve 12, so that the first elastic member 13 is generally assembled on the outer surfaces of the actuating sleeve 11 and the actuating sleeve 12. When the actuating sleeve 11 moves relative to the actuating sleeve 12 along the direction of the axis L, as the flange portion 112 of the actuating sleeve 11 approaches the plurality of abutting portions 122 of the actuating sleeve 12, the first elastic member 13 is compressed, and conversely, as the flange portion 112 of the actuating sleeve 11 moves away from the plurality of abutting portions 122 of the actuating sleeve 12, the first elastic member 13 expands by the elastic restoring force.

[0072] Please refer to Figure 3 It is a cross-sectional view of the actuating sleeve of the actuating assembly of the automatic injector of the present invention passing through the actuating sleeve. As Figure 3As shown, in one embodiment of the present invention, the actuating sleeve 11 of the actuating assembly 10 of the automatic injector of the present invention further includes at least one stop structure 116. The at least one stop structure 116 is convexly disposed on the surface of the channel 111. Here, the at least one stop structure 116 is an annular protrusion structure, and a concave space corresponding to the penetration direction of the execution sleeve 12 and capable of being inserted by the tip of the outward expansion portion 1212 is formed between the annular protrusion structure and the surface of the channel 111 of the actuating sleeve 11. In terms of structural design, the cross-sectional diameter length of the channel 111 of the actuating sleeve 11 based on the direction perpendicular to the axis L is smaller than the maximum cross-sectional diameter length of the execution sleeve 12 (for example, the cross-sectional diameter length corresponding to the outward expansion portion 1212 of the two cantilevers 121 of the execution sleeve 12). Accordingly, when the execution sleeve 12 is inserted relative to the actuating sleeve 11 along the axis L, the execution sleeve 12 cannot directly pass through the channel 111 of the actuating sleeve 11, and must first press against the outer expansion portion 1212 of the two cantilevers 121 of the execution sleeve 12 to swing toward the axis L, so that the maximum cross-sectional diameter length of the execution sleeve 12 is not greater than the cross-sectional diameter length of the channel 111 of the actuating sleeve 11 based on the direction perpendicular to the axis L, and then perform the insertion operation. Then, when the outer expansion portion 1212 of the cantilever 121 of the execution sleeve 12 reaches the position of at least one stop structure 116, the tip of the outer expansion portion 1212 will be stuck in the recessed space formed between the at least one stop structure 116 and the surface of the channel 111 of the actuating sleeve 11, thereby limiting the movement of the execution sleeve 12. At this time, the assembler must use an external tool to pass through the at least one auxiliary installation hole 115 and apply pressure to the cantilever 121 of the actuator sleeve 12, so that the cantilever 121 of the actuator sleeve 12 moves in the direction close to the axis L and reduces the maximum cross-sectional diameter of the actuator sleeve 12, so that the actuator sleeve 12 can pass through the at least one stop structure 116 and continue to complete the insertion operation. In the above process, the tip of the outer expansion part 1212 of the cantilever 121 will make a sound due to the external force bouncing off the at least one stop structure 116, so that the assembler can confirm whether the tip of the outer expansion part 1212 of the cantilever 121 has left the above recessed space.

[0073] Another example Figure 1 and Figure 2As shown, the rear cover 14 is coupled to one end of the actuating sleeve 12. In an embodiment of the present invention, the rear cover 14 includes a plurality of fastening members 141, and the plurality of fastening members 141 are correspondingly fastened to the plurality of fastening portions 123 of the actuating sleeve 12. Here, the plurality of fastening members 141 are a plurality of symmetrically arranged elastic arm structures, and each elastic arm structure extends towards the actuating sleeve 12 along the direction parallel to the axis L, and a elastic piece extending along the direction perpendicular to the axis L is formed on the side close to the actuating sleeve 12. The number, position and structure of the plurality of fastening members 141 are all matched with the plurality of fastening portions 123 of the aforementioned actuating sleeve 12. When the rear cover 14 is coupled to the actuating sleeve 12, the elastic pieces of the plurality of fastening members 141 will move along the inclined surface structure of the plurality of fastening portions 123 until the elastic pieces of the plurality of fastening members 141 move to the rear of the plurality of fastening portions 123. During the above process, the elastic pieces of the plurality of fastening members 141 will generate elastic force to impact the actuating sleeve 12 when crossing the plurality of fastening portions 123, making a sound for the assembler to confirm that the plurality of fastening members 141 of the rear cover 14 are fastened to the plurality of fastening portions 123 of the actuating sleeve 12. At this time, the elastic pieces of the plurality of fastening members 141 of the rear cover 14 will be blocked by the plurality of fastening portions 123 of the actuating sleeve 12 along the direction of the axis L, so that the rear cover 14 cannot be disengaged from the actuating sleeve 12 along the direction of the axis L.

[0074] The rear cover 14 further includes a plurality of corresponding guiding structures 142. Here, the plurality of corresponding guiding structures 142 are two symmetrically arranged convex strips, and each convex strip extends towards the actuating sleeve 12 along the direction parallel to the axis L. The number, position and structure of the plurality of corresponding guiding structures 142 are all matched with the plurality of guiding structures 124 of the aforementioned actuating sleeve 12. When the rear cover 14 is coupled to the actuating sleeve 12, through the cooperation of the plurality of corresponding guiding structures 142 of the rear cover 14 and the plurality of guiding structures 124 of the sleeve 12, the rear cover 14 and the actuating sleeve 12 can be coupled along the direction parallel to the axis L.

[0075] In addition, in an embodiment of the present invention, the rear cover 14 further includes a positioning member 143 for the second elastic member 16 to pass through and be positioned. Here, the positioning member 143 is a single rod-shaped member, and the rod-shaped member extends towards the actuating sleeve 12 along the direction parallel to the axis L.

[0076] The push rod 15 is mainly used to push the plunger of the medicine bottle in the accommodating assembly. The push rod 15 is movably inserted into the actuating sleeve 12 along the axis L. In an embodiment of the present invention, the push rod 15 includes two grooves 151, and the setting position and structure of the two grooves 151 are matched with the fastening portions 1211 of the two cantilevers 121 of the aforementioned actuating sleeve 12. A channel is provided inside the push rod 15 to penetrate both ends of the push rod 15, and openings of different sizes are formed at both ends of the push rod 15. The push rod 15 forms a smaller opening at the end far from the rear cover 14 through which the second elastic member 16 cannot pass.

[0077] Both ends of the second elastic member 16 respectively abut against the rear cover 14 and the push rod 15. In an embodiment of the present invention, one end of the second elastic member 16 passes through the positioning member 143 of the rear cover 14 to abut against the rear cover 14, and the other end of the second elastic member 16 penetrates into the push rod 15 from one end of the push rod 15 and abuts against the other end of the push rod 15 away from the rear cover 14. The cross-sectional diameter length of the second elastic member 16 is greater than the cross-sectional diameter length of the positioning member 143 of the rear cover 14, but less than the cross-sectional diameter length of the inner channel of the push rod 15. When the actuation assembly 10 of the automatic syringe of the present invention is assembled, the actuator sleeve 12 restricts the movement of the push rod 15, so that the second elastic member 16 is in a compressed state. When the actuator sleeve 12 is actuated by the actuation sleeve 11 to release the movement restriction on the push rod 15, the push rod 15 will be pushed by the elastic restoring force of the second elastic member 16 to move the push rod 15.

[0078] The actuation sleeve 11 moves relative to the actuator sleeve 12 along the axis L direction, so that the actuator sleeve 12 compresses the first elastic member 13 as the flange portion 112 of the actuation sleeve 11 approaches the plurality of abutting portions 122 of the actuator sleeve 12, and conversely, the first elastic member 13 expands by the elastic restoring force as the flange portion 112 of the actuation sleeve 11 moves away from the plurality of abutting portions 122 of the actuator sleeve 12.

[0079] During the assembly process of the actuation assembly 10 of the automatic syringe of the present invention, the actuator sleeve 12 is first passed through the channel 111 of the actuation sleeve 11, and at this time, the first elastic member 13 is clamped between the actuator sleeve 12 and the actuation sleeve 11; then, the rear cover 14 is combined with one end of the actuator sleeve 12. After the above procedures are completed, the actuation sleeve 11 is moved relative to the actuator sleeve 12 along the axis L direction to compress the first elastic member 13, so that the two cantilevers 121 of the actuator sleeve 12 pass through the channel 111 and are exposed at the end of the actuation sleeve 11 away from the rear cover 14, and then the push rod 15 and the second elastic member 16 are passed through the actuator sleeve 12, and the second elastic member 16 is in a compressed state. Finally, the actuation sleeve 11 is moved relative to the actuator sleeve 12 along the axis L direction in the reverse direction to the original position where the first elastic member 13 is not compressed. At this time, the two cantilevers 121 of the actuator sleeve 12 will be restricted in the channel 111 of the actuation sleeve 11, and the clamping portions 1211 of each cantilever 121 will be correspondingly clamped into the groove 151 of the push rod 15, thereby restricting the movement of the push rod 15. Accordingly, the assembly of the actuation assembly 10 of the automatic syringe of the present invention is completed.

[0080] When the actuating sleeve 11 of the actuating assembly 10 of the auto-injector of the present invention is actuated to move relative to the actuating sleeve 12 along the axis L direction, causing the first elastic member 13 to be gradually compressed, the actuating sleeve 11 will release the restriction on the cantilever 121 of the actuating sleeve 12, causing the cantilever 121 to elastically move away from the axis L. At this time, the locking portion 1211 of the cantilever 121 will disengage from the groove 151 of the push rod 15. Therefore, the push rod 15 is actuated by the compressed second elastic member 16 to move away from the rear cover 14.

[0081] The auto-injector of the present invention is used to install and inject a medicine bottle. Please refer to Figures 4 to 6 , wherein Figure 4 is an exploded view of the auto-injector of the present invention, Figure 5 is a schematic view of the auto-injector of the present invention, Figure 6 is an exploded view of the accommodating assembly of the auto-injector of the present invention. As Figures 4 to 6 shown, the auto-injector 1 of the present invention includes the actuating assembly 10 and the accommodating assembly 20 as described above. The accommodating assembly 20 is coupled to one end of the actuating assembly 10 where the push rod 15 is exposed. The accommodating assembly 20 includes a housing 21, a medicine bottle sleeve 22, and a needle cap 23. The accommodating assembly 20 as a whole also corresponds to the axis L, such that the movable components of the accommodating assembly 20 move relative to other components along the axis L. The housing 21, the medicine bottle sleeve 22, and the needle cap 23 can be made of the same or different rigid materials, such as plastic materials, metals, or alloys, etc. In terms of structural design, the housing 21, the medicine bottle sleeve 22, and the needle cap 23 are all similar to tubular members in appearance, such that the hollow portions of the foregoing components can accommodate the corresponding components, but the present invention is not limited thereto.

[0082] The housing 21 includes a plurality of fastening holes 211 and inspection holes 212. The plurality of fastening holes 211 are available for the plurality of fastening members 141 of the rear cover 14 to be fastened, such that the actuating assembly 10 is fixed to the housing 21 of the accommodating assembly 20 through the rear cover 14. Each of the foregoing fastening members 141 is provided with a protruding fastening structure on the side where the elastic piece faces outward, such that during the process of the actuating assembly 10 being combined with the accommodating assembly 20 along the axis L direction, the fastening structures of each fastening member 141 are snapped into the fastening holes 211 through the action of the elastic arms, and then make a sound when hitting the housing 21 due to the elastic force, for the assembly personnel to confirm that the plurality of fastening structures of the rear cover 14 and the plurality of fastening holes 211 of the housing 21 are engaged. At this time, the rear cover 14 of the actuating assembly 10 can be fixed to the housing 21 of the accommodating assembly 20. The inspection hole 212 is available for the user to confirm the injection state of the medicine bottle 30.

[0083] The vial sleeve 22 is coupled to the outer housing 21 for mounting the vial 30. The vial sleeve 22 includes a viewing portion 221 which is disposed on the outer surface of the vial sleeve 22, and the vial sleeve 22 protrudes from the outer surface by a sufficient height such that the vial sleeve 22 is fixed to the viewing hole 212 of the outer housing 21 through the viewing portion 221. In an embodiment of the present invention, the vial sleeve 22 is at least made of a transparent material for the viewing portion 221 to facilitate the user to view the vial 30 through the viewing portion 221.

[0084] The needle cap 23 is inserted through the outer housing 21, and a part of the needle cap 23 is exposed at one end of the outer housing 21. The needle cap 23 is movable relative to the outer housing 21 and the vial sleeve 22, and the actuation sleeve 11 can be actuated by the movement of the needle cap 23. The needle cap 23 includes a chute 231 and a plurality of corresponding engaging portions 232. In an embodiment of the present invention, when the vial sleeve 22 is inserted into the needle cap 23, the viewing portion 221 of the vial sleeve 22 passes through the chute 231 and is fixed to the viewing hole 212 of the outer housing 21, and when the needle cap 23 moves relative to the vial sleeve 22, the viewing portion 221 moves within the chute 231. The plurality of corresponding engaging portions 232 are disposed at one end of the needle cap 23 adjacent to the actuation assembly 10 for guiding the plurality of engaging portions 114 of the actuation sleeve 11 to engage with the plurality of corresponding engaging portions 232 after the needle cap 23 moves towards the actuation assembly 10, so that the needle cap 23 and the actuation sleeve 11 are interlocked. Here, the plurality of corresponding engaging portions 232 are two open holes symmetrically arranged to cooperate with the plurality of engaging portions 114.

[0085] In an embodiment of the present invention, the accommodating assembly 20 further includes a gasket 24. The gasket 24 is disposed at one end of the vial sleeve 22 adjacent to the actuation assembly 10, so that when the vial 30 is mounted in the vial sleeve 22 of the accommodating assembly 20, the gasket 24 can serve as a mounting and injection buffer for the vial 30.

[0086] In addition, in an embodiment of the present invention, the accommodating assembly 20 further includes an extension member 25 and a cover 26. The extension member 25 is disposed at the opposite end of the accommodating assembly 20 where the actuation assembly 10 is coupled, and the extension member 25 is fixed to the vial sleeve 22. The cover 26 is used to close the opposite end of the outer housing 21 of the accommodating assembly 20 where the actuation assembly 10 is coupled, so that in the unused state of the automatic syringe 1 of the present invention, the cover 26 can prevent accidental contact with the needle cap 23 exposed outside the outer housing 21.

[0087] During the assembly process of the automatic syringe 1 of the present invention, the vial 30 is first mounted in the vial sleeve 22 of the accommodating assembly 20, and at this time, the cover 26 of the accommodating assembly 20 closes the end of the outer housing 21 where the needle cap 23 is exposed; then, the actuation assembly 10 is coupled to the other end of the accommodating assembly 20. Accordingly, the assembly of the automatic syringe 1 of the present invention is completed.

[0088] The following can be used in conjunction with Figures 1 to 6 As shown, when the user desires to use the auto-injector 1 of the present invention, first remove the cover 26 from the outer housing 21 so that the needle cap 23 is exposed; then, place the end of the auto-injector 1 of the present invention with the exposed needle cap 23 against the body part to be injected, and apply force to the skin by holding the outer housing 21, causing the needle cap 23 to move inwardly towards the outer housing 21. At this time, the end of the needle cap 23 adjacent to the actuating assembly 10 will push against the actuating sleeve 11, causing the actuating sleeve 11 to be actuated and move along the axis L direction relative to the actuating sleeve 12, and the first elastic member 13 is gradually compressed. The actuating sleeve 11 after movement will release the restriction on the cantilever 121 of the actuating sleeve 12, causing the cantilever 121 to pop out in a direction away from the axis L, so that the outward expansion portion 1212 of the cantilever 121 strikes the needle cap 23 to produce a clicking sound, prompting the user that the injection procedure has been started and meeting the standards of medical regulations. Then, the locking portion 1211 of the cantilever 121 will disengage from the groove 151 of the push rod 15. Therefore, the push rod 15 is actuated by the compressed second elastic member 16 without interference and moves towards the medicine bottle 30, thereby pushing the plunger in the medicine bottle 30 to drive the medicine to be output towards the needle part. When the injection is completed, the user removes the auto-injector 1 of the present invention from the body part. At this time, the actuating sleeve 11 returns to its original position by the elastic restoring force of the first elastic member 13, and drives the needle cap 23 to move and be exposed outside the outer housing 21 again to conceal the needle part of the medicine bottle 30.

[0089] Although the embodiments of the present invention are disclosed as above, they are not intended to limit the present invention. Any person skilled in the relevant art can make some changes to the shape, structure, features, methods and quantities described in the claims of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the scope of the claims attached to this specification.

Claims

1. An actuation assembly of an auto-injector for coupling with a receiving assembly having a vial disposed therein, characterized in that, The actuation assembly of the auto-injector comprises: An actuation sleeve including a channel; An actuator sleeve movably disposed along an axis within the channel, the actuator sleeve including two symmetric cantilevers, and each of the cantilevers including a fastening portion; A first elastic member having two ends respectively abutting against the actuation sleeve and the actuator sleeve; A rear cover coupled to one end of the actuator sleeve; A push rod movably disposed along the axis within the actuator sleeve, the push rod including two grooves; and a second elastic member having two ends respectively abutting against the rear cover and the push rod; Wherein when the cantilevers of the actuator sleeve are restricted within the channel of the actuation sleeve, the fastening portions of the cantilevers snap into the grooves of the push rod to restrict movement of the push rod; when the actuation sleeve moves relative to the actuator sleeve along the axis direction, the first elastic member is gradually compressed such that the fastening portions of the cantilevers of the actuator sleeve disengage from the grooves of the push rod, and the push rod is actuated by the compressed second elastic member to move towards the vial; Wherein the actuation sleeve further includes at least one stop structure protruding from a surface of the channel, the actuation sleeve further includes at least one auxiliary mounting hole penetrating from an outer surface of the actuation sleeve to the channel, and the at least one auxiliary mounting hole is located between one end of the actuation sleeve adjacent to the rear cover and the at least one stop structure.

2. The actuation assembly of the auto-injector according to claim 1, characterized in that, Wherein the actuation sleeve includes a flange portion disposed on an outer surface of the actuation sleeve, and the actuator sleeve further includes a plurality of abutting portions; two ends of the first elastic member respectively abut against the flange portion of the actuation sleeve and the plurality of abutting portions of the actuator sleeve.

3. The actuation assembly of the autoinjector according to claim 2, characterized in that, Wherein the actuation sleeve further includes a plurality of grooves, the plurality of abutting portions of the actuator sleeve pass through the plurality of grooves to protrude from the outer surface of the actuation sleeve, and when the actuator sleeve moves relative to the actuation sleeve, the plurality of abutting portions move along the plurality of grooves.

4. The actuation assembly of the autoinjector according to claim 1, characterized in that, Wherein the actuator sleeve further includes a plurality of fastening portions, and the rear cover further includes a plurality of fastening members correspondingly fastened to the plurality of fastening portions.

5. The actuation assembly of the auto-injector according to claim 1, wherein, Wherein the rear cover includes a plurality of guiding members, and the actuator sleeve further includes a plurality of corresponding guiding members; when the rear cover moves relative to the actuator sleeve, the rear cover moves along the axis relative to the actuator sleeve by means of the cooperation of the plurality of guiding members and the plurality of corresponding guiding members.

6. The actuation assembly of the autoinjector according to claim 1, characterized in that, Wherein each of the cantilevers further includes an outwardly expanding portion correspondingly snapped into the at least one stop structure.

7. An auto-injector for loading and injecting a vial, characterized in that, The auto-injector comprises: An actuation assembly according to any one of claims 1 to 6; and A housing assembly coupled to one end of the actuation assembly, the housing assembly including: An outer housing; A vial sleeve coupled to the outer housing for mounting the vial; and A needle cap penetrating and partially exposed from the outer housing, and the needle cap is movable relative to the outer housing and the vial sleeve; When the needle cap moves towards the outer housing under an external force, the actuating sleeve of the actuating assembly is pushed by the needle cap, so that the clamping portion of the cantilever of the actuating sleeve disengages from the groove of the push rod, and then the push rod is actuated by the compressed second elastic member, prompting the push rod to move towards the medicine bottle to complete the injection.

8. The autoinjector according to claim 7, wherein The accommodating assembly further includes a gasket, and the gasket is disposed at one end of the medicine bottle sleeve adjacent to the actuating assembly.

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