CN215741028U - Auto-injector and actuation assembly therefor - Google Patents

Abstract

The present creation is an auto-injector and an actuating assembly thereof, the actuating assembly of the auto-injector for combining a receiving assembly provided with a vial, the actuating assembly of the auto-injector comprising: the actuating sleeve, the first elastic piece, the back cover, the push rod and the second elastic piece. The actuating assembly integrally corresponds to one axis, and the actuating sleeve is used for controlling the movement of the push rod before and after the actuating sleeve is actuated through the structural design of the two symmetrical cantilever arms and the corresponding parts of the actuating sleeve, and sounds during assembly to remind whether the assembly is in place or not and the automatic injection is finished. Accordingly, when the actuating sleeve is actuated, the push rod can be urged to move towards the medicine bottle to complete the automatic injection effect.

Description

Auto-injector and actuation assembly therefor

[ technical field ] A method for producing a semiconductor device

The present invention relates to an actuating assembly for an automatic injector, and more particularly, to an actuating assembly for an automatic injector that actuates a vial mounted for performing an injection. The present invention also relates to an auto-injector using the above-described actuation assembly.

[ background of the invention ]

When a patient needs to inject medicine in the past, medical staff is always needed to assist in executing an injection procedure. With the progress of medical technology, automatic injection needles that can be operated and fired by patients have been widely used. The patient only needs to operate the automatic injection needle tool by one hand to complete the injection of the medicine, thereby reducing the consumption of medical manpower and resources and improving the convenience and the flexibility of the injection.

However, in order to achieve the purpose of easy operation and automatic injection, the conventional automatic injection needle is often too complicated in structural design, which results in that the needle is not easy to assemble and the manufacturing cost is increased. Therefore, how to simplify the structure and number of the assembling parts, reduce the assembling difficulty of the automatic injection needle, and facilitate the operation of the user is a subject worth to be studied.

[ Utility model ] content

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an automatic injector and an actuating assembly thereof, which can simplify the structural design, improve the convenience of assembly, and meet the medical standards of assembly and injection procedures.

The actuating assembly of the automatic injector comprises an actuating sleeve, a first elastic piece, a rear cover, a push rod and a second elastic piece. The actuating sleeve includes a channel; the execution sleeve is movably arranged in the channel in a penetrating way along one axis and comprises two symmetrical cantilevers, and each cantilever comprises a clamping part; two ends of the first elastic piece are respectively abutted against the actuating sleeve and the actuating sleeve; the back cover is combined with one end of the execution sleeve; the push rod is movably arranged in the execution sleeve in a penetrating way along the axis and comprises two grooves; and two ends of the second elastic piece are respectively abutted against the rear cover and the push rod. When the cantilever of the actuating sleeve is limited in the channel of the actuating sleeve, the clamping part of the cantilever is clamped into the groove of the push rod to limit the movement of the push rod; when the actuating sleeve moves relative to the actuating sleeve along the axial direction, the first elastic piece is gradually compressed to enable the clamping portion of the cantilever of the actuating sleeve to be separated from the groove of the push rod, and the push rod is actuated to move towards the medicine bottle through the compressed second elastic piece.

In one embodiment of the present disclosure, the actuating sleeve includes a flange portion disposed on an outer surface of the actuating sleeve, and the actuating sleeve further includes a plurality of engaging portions; two ends of the first elastic piece are respectively abutted against the flange part of the actuating sleeve and the plurality of clamping parts of the actuating sleeve.

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

In an embodiment of the present disclosure, the execution 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.

In one embodiment of the present creation, the back cover further comprises a plurality of guides, and the actuation sleeve further comprises a plurality of corresponding guides; when the back cover moves relative to the actuating sleeve, the back cover moves relative to the actuating sleeve along the axis by the plurality of guides engaging the plurality of corresponding guides.

In one embodiment of the present invention, the actuating sleeve further comprises at least one stop structure protruding from the surface of the channel.

In one embodiment of the present invention, each cantilever further comprises an outward-expanding portion, which is correspondingly clamped into at least one stop structure.

In one embodiment of the present disclosure, the actuating sleeve further includes at least one auxiliary mounting hole, the at least one auxiliary mounting hole is formed from an outer surface of the actuating sleeve to the channel, and the at least one auxiliary mounting hole is located between an end of the actuating sleeve adjacent to the rear cover and the at least one stopping structure.

The inventive autoinjector includes an actuating assembly as previously described and a containment assembly. The accommodating component is combined with one end of the actuating component and comprises an outer shell, a medicine bottle sleeve and a needle cover. The medicine bottle sleeve is combined with the outer shell for installing the medicine bottle; the needle cover penetrates through and is partially exposed out of the outer shell, and the needle cover can move relative to the outer shell and the medicine bottle sleeve. When the needle cover moves towards the outer shell under the action of external force, the needle cover pushes against the actuating sleeve of the actuating component, so that the two clamping parts of the two cantilevers of the actuating sleeve are separated from the groove of the push rod, and the compressed second elastic piece actuates the push rod to enable the push rod to move towards the medicine bottle so as to finish injection.

In one embodiment of the present creation, the automatic injector further comprises a grommet disposed at an end of the vial sleeve adjacent the actuation assembly.

According to the automatic injector and the actuating assembly thereof, the structural design of the two symmetrical cantilevers of the actuating sleeve and the corresponding parts can be effectively simplified, the assembly convenience is improved, the automatic injector can make a sound in the assembly and injection processes to prompt the assembly and injection to be in place and the automatic injection to be finished, and the automatic injector and the actuating assembly thereof accord with the medical regulation standards of the assembly and injection processes.

The specific techniques employed in the present invention will be further described with reference to the following examples and accompanying drawings.

[ description of the drawings ]

Figure 1 is an exploded view of the actuation assembly of the inventive autoinjector.

Figure 2 is a schematic view of the actuation assembly of the inventive autoinjector.

Figure 3 is a cross-sectional view of the actuation sleeve of the actuation assembly of the inventive autoinjector with the actuation sleeve disposed through the actuation sleeve.

Figure 4 is an exploded view of the automatic injector of the present creation.

Figure 5 is a schematic view of the inventive autoinjector.

Figure 6 is an exploded view of the containment assembly of the inventive autoinjector.

Description of the main component symbols:

1 automatic injector

10 actuating assembly

11 actuating sleeve

111 channel

112 flange part

113 groove

114 joint part

115 auxiliary mounting hole

116 stop structure

12 execution sleeve

121 cantilever

1211 fastener part

1212 external expanding part

122 clamping part

123 fastening part

124 guiding structure

13 first elastic member

14 back cover

141 fastener

142 corresponds guide structure

143 locating element

15 push rod

151 groove

16 second elastic member

20 accommodation assembly

21 outer casing

211 buckling hole

212 inspection hole

22 medicine bottle sleeve

221 inspection part

23-needle cover

231 chute

232 corresponding joint part

24 backing ring

30 medicine bottle

L axis

[ detailed description ] embodiments

For a fuller understanding of the objects, features and advantages of the present disclosure, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In this disclosure, the use of "a" or "an" is used to describe elements, components and assemblies described herein. This is for convenience of illustration only and provides a general sense of the scope of the present disclosure. Thus, unless clearly indicated to the contrary, such description should be read to include one, at least one and the singular also includes the plural.

In this disclosure, the terms "comprising," "including," "having," "containing," or any other similar term are intended to cover non-exclusive inclusions. For example, an element, structure, article, or apparatus that comprises a plurality of elements is not limited to only those elements but may include other elements not expressly listed or inherent to such element, structure, article, or apparatus. In addition, unless expressly stated to the contrary, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or".

The actuating assembly of the inventive autoinjector is adapted to engage a receiving assembly provided with a vial, the vial being actuated by the actuating assembly to perform an injection operation towards a user. Referring first to fig. 1 and 2, fig. 1 is an exploded view of an actuating assembly of the automatic injector of the present invention, and fig. 2 is a schematic view of the actuating assembly of the automatic injector of the present invention. As shown in fig. 1 and 2, the actuating assembly 10 of the automatic injector of the present invention includes an actuating sleeve 11, an actuating sleeve 12, a first elastic member 13, a rear cap 14, a push rod 15, and a second elastic member 16. The actuation assembly 10 generally corresponds to an axis L such that the movable part of the actuation assembly 10 moves relative to the other parts in the direction of said axis L. The actuating sleeve 11, the actuating sleeve 12, the rear cover 14 and the push rod 15 may be made of the same or different rigid materials, such as plastic materials, metals or alloys, and the first elastic element 13 and the second elastic element 16 may be made of metals or alloys. In terms of structural design, the actuating sleeve 11, the actuating sleeve 12 and the push rod 15 are similar to tubular members in appearance, so that the hollow portions of the aforementioned components can accommodate the corresponding components, but the present invention is not limited thereto.

The actuating sleeve 11 comprises a channel 111 and a flange portion 112. The passage 111 extends from one end of the actuating sleeve 11 to the other end thereof, and is used for passing components such as the actuating sleeve 12. The flange portion 112 is disposed on the outer surface of the actuating sleeve 11, and the flange portion 112 protrudes from the outer surface by a sufficient height for abutting against the first elastic member 13.

The actuating sleeve 11 further comprises a plurality of grooves 113 and a plurality of joints 114. Each groove 113 is a semi-open groove, that is, each groove 113 extends from one end of the actuating sleeve 11 toward the other end but does not reach the other end. The plurality of grooves 113 are two grooves symmetrically disposed, but the number and the positions of the plurality of grooves 113 are not limited thereto. The engaging portions 114 are disposed at opposite ends of the actuating sleeve 11 forming the grooves 113 for cooperating with the receiving members. The plurality of connecting portions 114 are two symmetrically disposed bumps, but the number and the positions of the plurality of connecting portions 114 are not limited thereto.

In one embodiment of the present disclosure, the actuating sleeve 11 further comprises at least one auxiliary mounting hole 115, each auxiliary mounting hole 115 extending 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, the at least one auxiliary mounting hole 115 is two symmetrically disposed openings, but the number and the position of the at least one auxiliary mounting hole 115 are not limited thereto.

The actuating sleeve 12 is movably disposed along the axis L through the passage 111 of the actuating sleeve 11. The actuating sleeve 12 includes two symmetrical cantilever arms 121 for controlling the movement of the push rod before and after the actuating sleeve 11 is actuated. Each arm 121 extends substantially along the axis L, and one end of each arm 121 is connected to the body of the actuating sleeve 12 to form a fulcrum, while the other end is a free end, so that it can swing about the fulcrum to vary the distance from the axis L. Each cantilever 121 includes a fastening portion 1211 and an expanding portion 1212, wherein the fastening portion 1211 and the expanding portion 1212 are disposed at the free end, and the fastening portion 1211 extends toward the direction close to the axis L, and the expanding portion 1212 extends toward the direction away from the axis L and parallel to the axis L, so that the execution sleeve 12 has a minimum cross-sectional diameter length of the execution sleeve 12 in a surrounding area where the fastening portion 1211 is located based on the direction perpendicular to the axis L, and has a maximum cross-sectional diameter length of the execution sleeve 12 in a surrounding area where the expanding portion 1212 is located based on the direction perpendicular to the axis L. The fastening portion 1211 is a protrusion, and the flaring portion 1212 is formed in a shape of a tip along the axis L.

The actuating sleeve 12 further includes a plurality of abutments 122. The plurality of engaging portions 122 are disposed on the outer surface of the actuating sleeve 12, and the plurality of engaging portions 122 protrude from the outer surface by a sufficient height for engaging with the first elastic member 13. In one embodiment of the present disclosure, when the actuating sleeve 12 is disposed in the channel 111 of the actuating sleeve 11, the plurality of engaging 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 engaging portions 122 move along the plurality of grooves 113.

In one embodiment of the present creation, the actuation sleeve 12 further comprises a plurality of clasps 123. The fastening portions 123 are disposed at one end of the rear cover 14 for fastening the rear cover 14. Here, the plurality of fastening portions 123 are a plurality of stoppers symmetrically disposed, and each stopper has a slope structure on a side facing the rear cover 14, but the number and the position of the plurality of fastening portions 123 are not limited thereto. A plurality of engaging portions 114 are provided at opposite ends of the actuating sleeve 11 forming a plurality of grooves 113 for engaging the receiving members. Here, the plurality of coupling portions 114 are two stoppers symmetrically disposed, but the number and positions of the plurality of coupling portions 114 are not limited thereto.

The actuator sleeve 12 also includes a plurality of guide structures 124. A plurality of guide structures 124 are disposed at one end of the actuating sleeve 12 that engages the rear cover 14. The plurality of guiding structures 124 are two half-open grooves symmetrically disposed, and each groove extends from the end of the actuating sleeve 12 along a direction parallel to the axis L, but the number and the position of the plurality of guiding structures 124 are not limited thereto.

The two ends of the first elastic element 13 respectively abut against the actuating sleeve 11 and the actuating sleeve 12. In one embodiment of the present disclosure, two ends of the first elastic element 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 of the first elastic element 13 is greater than the minimum cross-sectional diameter of the outer surfaces of the actuating sleeve 11 and the actuating sleeve 12, so that the first elastic element 13 is substantially assembled on the outer surfaces of the actuating sleeve 11 and the actuating sleeve 12. When the actuating sleeve 11 moves in the direction of the axis L relative to the actuating sleeve 12, the first elastic element 13 is compressed as the flange portion 112 of the actuating sleeve 11 approaches the plurality of abutment portions 122 of the actuating sleeve 12, whereas the first elastic element 13 is expanded by the elastic restoring force as the flange portion 112 of the actuating sleeve 11 moves away from the plurality of abutment portions 122 of the actuating sleeve 12.

Fig. 3 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 shown in fig. 3, in one embodiment of the present creation, the actuation sleeve 11 of the actuation assembly 10 of the present creation further comprises at least one stop structure 116. At least one stop structure 116 is disposed on the surface of the channel 111. Here, the at least one stopping structure 116 is an annular protrusion structure, and a concave space corresponding to the penetrating direction of the actuating sleeve 12 and into which the tip of the flaring portion 1212 can be inserted 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 in the direction perpendicular to the axis L is smaller than the maximum cross-sectional diameter length of the actuating sleeve 12 (e.g., the cross-sectional diameter length corresponding to the flared section 1212 of the two cantilever arms 121 of the actuating sleeve 12). Accordingly, when the actuating sleeve 12 is inserted along the direction of the axis L relative to the actuating sleeve 11, the actuating sleeve 12 cannot directly pass through the passage 111 of the actuating sleeve 11, and must first press the flaring portions 1212 of the two cantilever arms 121 of the actuating sleeve 12 to swing toward the axis L, so that the maximum cross-sectional diameter of the actuating sleeve 12 is not longer than the cross-sectional diameter of the passage 111 of the actuating sleeve 11 in the direction perpendicular to the axis L, and then the insertion operation is performed. Then, when the flaring portion 1212 of the cantilever arm 121 of the actuating sleeve 12 reaches the position of the at least one stopping structure 116, the tip of the flaring portion 1212 is caught in the recessed space formed between the at least one stopping structure 116 and the surface of the channel 111 of the actuating sleeve 11, so as to limit the movement of the actuating sleeve 12. At this time, the assembling personnel must pass through the at least one auxiliary mounting hole 115 and press the cantilever 121 of the actuating sleeve 12 by an external tool, so that the cantilever 121 of the actuating sleeve 12 moves toward the direction close to the axis L to reduce the maximum cross-sectional length of the actuating sleeve 12, so that the actuating sleeve 12 can pass through the at least one stopping structure 116 to continue to complete the threading operation. In the above process, the tip of the flaring portion 1212 of the cantilever 121 will be bounced off the at least one stopping structure 116 by an external force to make a sound, so that the assembling personnel can confirm whether the tip of the flaring portion 1212 of the cantilever 121 has been disengaged from the recessed space.

As also shown in fig. 1 and 2, the rear cover 14 is coupled to one end of the actuating sleeve 12. In one embodiment of the present disclosure, the rear cover 14 includes a plurality of fasteners 141, and the plurality of fasteners 141 are correspondingly fastened to the plurality of fastening portions 123 of the actuating sleeve 12. The plurality of fastening members 141 are symmetrically arranged a plurality of elastic arm structures, each of the elastic arm structures extends toward the actuating sleeve 12 along the direction parallel to the axis L, and an elastic sheet extending along the direction perpendicular to the axis L is formed on one side close to the actuating sleeve 12, and the number, position and structure of the plurality of fastening members 141 are all matched with the plurality of fastening parts 123 of the actuating sleeve 12. When the rear cover 14 is coupled to the actuating sleeve 12, the resilient pieces of the plurality of fastening members 141 move along the inclined plane structure of the plurality of fastening portions 123 until the resilient pieces of the plurality of fastening members 141 move behind the plurality of fastening portions 123. In the above process, the elastic pieces of the plurality of fasteners 141 may generate an elastic force to impact the actuating sleeve 12 to make a sound due to the elastic force generated by passing over the plurality of fastening portions 123, so that the assembler can confirm that the plurality of fasteners 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 pieces 141 of the rear cover 14 are blocked by the plurality of fastening parts 123 of the actuating sleeve 12 along the direction of the axis L, so that the rear cover 14 cannot be separated from the actuating sleeve 12 along the direction of the axis L.

The rear cover 14 also includes a plurality of corresponding guide structures 142. Here, the corresponding guiding structures 142 are two symmetrically disposed protruding strips, and each protruding strip extends toward the actuating sleeve 12 along the direction parallel to the axis L, and the number, position and structure of the corresponding guiding structures 142 are all matched with the guiding structures 124 of the actuating sleeve 12. During the process of coupling the back cover 14 to the actuating sleeve 12, the plurality of guide structures 124 of the sleeve 12 are engaged by the plurality of corresponding guide structures 142 of the back cover 14 such that the back cover 14 and the actuating sleeve 12 can remain coupled in a direction parallel to the axis L.

In addition, in an embodiment of the present disclosure, the rear cover 14 further includes a positioning element 143 for the second elastic element 16 to pass through and be positioned. The positioning element 143 is a single rod-shaped element extending in a direction parallel to the axis L towards the actuating sleeve 12.

The push rod 15 is primarily used to push the plunger of the vial contained within the assembly. The push rod 15 is movably disposed through the actuating sleeve 12 along the axis L. In one embodiment of the present invention, the push rod 15 includes two grooves 151, and the two grooves 151 are disposed at positions and structures matching with the fastening portions 1211 of the two cantilevers 121 of the actuating sleeve 12. The push rod 15 is provided with a channel inside to penetrate through two ends of the push rod 15, and openings with different sizes are formed at two ends of the push rod 15. The push rod 15 forms a small opening at the end remote from the rear cover 14 through which the second elastic member 16 cannot pass.

Both ends of the second elastic member 16 abut against the rear cover 14 and the push rod 15, respectively. In an embodiment of the present disclosure, one end of the second elastic element 16 penetrates through the positioning element 143 of the rear cover 14 to abut against the rear cover 14, and the other end of the second elastic element 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 second elastic member 16 has a sectional diameter longer than the positioning member 143 of the rear cover 14 but shorter than the passage in the push rod 15. When the actuator assembly 10 of the present automatic injector is assembled, the actuator sleeve 12 restricts the movement of the plunger 15 such that the second resilient member 16 is in a compressed state. When the actuating sleeve 12 is actuated by the actuating sleeve 11 to release the movement restriction of the push rod 15, the push rod 15 is pushed by the elastic restoring force of the second elastic member 16 to move the push rod 15.

The actuating sleeve 11 moves in the direction of the axis L relative to the actuating sleeve 12, such that the actuating sleeve 12 causes the first elastic element 13 to be compressed as the flange portion 112 of the actuating sleeve 11 approaches the plurality of abutting portions 122 of the actuating sleeve 12, whereas the first elastic element 13 is expanded by the elastic restoring force as the flange portion 112 of the actuating sleeve 11 moves away from the plurality of abutting portions 122 of the actuating sleeve 12.

In the assembling process of the actuating assembly 10 of the automatic injector of the present invention, the actuating sleeve 12 is first inserted into the channel 111 of the actuating sleeve 11, and the first elastic element 13 is then sandwiched between the actuating sleeve 12 and the actuating sleeve 11; then, the rear cap 14 is coupled to one end of the actuating sleeve 12. After the above procedure is completed, the actuating sleeve 11 is moved along the axis L direction relative to the actuating sleeve 12 to compress the first elastic element 13, such that the two suspension arms 121 of the actuating sleeve 12 pass through the channel 111 and are exposed at an end of the actuating sleeve 11 away from the rear cover 14, and then the push rod 15 and the second elastic element 16 are inserted into the actuating sleeve 12, such that the second elastic element 16 is in a compressed state. Finally, the actuating sleeve 11 is moved reversely along the axis L direction relative to the actuating sleeve 12 to the original position of the uncompressed first elastic element 13, at this time, the two cantilever arms 121 of the actuating sleeve 12 are restricted in the channels 111 of the actuating sleeve 11, and the fastening portion 1211 of each cantilever arm 121 is correspondingly fastened into the groove 151 of the push rod 15, so as to restrict the movement of the push rod 15. Accordingly, assembly of the actuation assembly 10 of the inventive autoinjector is completed.

When the actuating sleeve 11 of the actuating assembly 10 of the present automatic injector is actuated to move along the direction of the axis L relative to the actuating sleeve 12, causing the first elastic member 13 to be gradually compressed, the actuating sleeve 11 releases the restriction on the cantilever arms 121 of the actuating sleeve 12, so that the cantilever arms 121 are sprung away from the axis L, and the locking portions 1211 of the cantilever arms 121 are disengaged from the grooves 151 of the push rod 15, so that the push rod 15 is actuated to move away from the rear cover 14 by the compressed second elastic member 16.

The automatic injector of this creation is used for installing and injecting the medicine bottle. Referring to fig. 4 to 6, fig. 4 is an exploded view of the automatic injector of the present invention, fig. 5 is a schematic view of the automatic injector of the present invention, and fig. 6 is an exploded view of the housing assembly of the automatic injector of the present invention. As shown in fig. 4 to 6, the inventive auto-injector 1 comprises an actuating assembly 10 and a receiving assembly 20 as described above. The receiving assembly 20 is coupled to an end of the actuating assembly 10, which exposes the push rod 15, and the receiving assembly 20 includes an outer housing 21, a medicine bottle sleeve 22 and a needle cover 23. The containing assembly 20 as a whole also corresponds to the axis L, so that the movable part of the containing assembly 20 moves relative to the other parts along said axis L. The outer housing 21, vial sleeve 22 and needle cover 23 may be made of the same or different rigid materials, such as plastic, metal or alloy. In terms of structural design, the outer housing 21, the vial sleeve 22 and the needle cover 23 are similar to a tubular member in appearance, so that the hollow portion of the aforementioned components can accommodate the corresponding components, but the present invention is not limited thereto.

The outer housing 21 includes a plurality of snap holes 211 and a viewing hole 212. The plurality of fastening holes 211 are adapted to be fastened by the plurality of fasteners 141 of the rear cover 14, so that the actuating assembly 10 is fixed to the outer housing 21 of the accommodating assembly 20 through the rear cover 14. The fastening structure of each fastening member 141 is provided with a protruding fastening structure on the outward side of the elastic sheet, so that when the actuating assembly 10 is combined toward the accommodating assembly 20 along the direction of the axis L, the fastening structure of each fastening member 141 is fastened into the fastening hole 211 under the action of the elastic arm, and then the elastic force strikes the outer casing 21 to make a sound, so that the assembler can confirm that the fastening structures of the rear cover 14 are fastened with the fastening holes 211 of the outer casing 21. At this time, the rear cover 14 of the actuating assembly 10 can be fixed to the outer housing 21 of the accommodating assembly 20. The sight hole 212 allows the user to confirm the injection state of the medicine bottle 30.

The vial sleeve 22 is coupled to the outer housing 21 for receiving the vial 30. The vial sleeve 22 includes a viewing portion 221, the viewing portion 221 is disposed on an 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 aperture 212 of the outer housing 21 through the viewing portion 221. In one embodiment of the present disclosure, the vial sleeve 22 may be made of a transparent material at least for the inspection portion 221, so as to facilitate the user to inspect the vial 30 through the inspection portion 221.

The needle cover 23 is disposed through the outer casing 21, and a portion of the needle cover 23 is exposed at one end of the outer casing 21. The needle cover 23 is movable relative to the outer housing 21 and the vial sleeve 22, and the actuation sleeve 11 is actuatable by movement of the needle cover 23. The needle cover 23 includes a slide groove 231 and a plurality of corresponding coupling portions 232. In one embodiment of the present disclosure, when the medicine bottle sleeve 22 is inserted into the needle cover 23, the inspection portion 221 of the medicine bottle sleeve 22 passes through the sliding slot 231 and is clamped in the inspection hole 212 of the outer housing 21, and when the needle cover 23 moves relative to the medicine bottle sleeve 22, the inspection portion 221 moves in the sliding slot 231. The corresponding engaging portions 232 are disposed at an end of the needle cover 23 adjacent to the actuating assembly 10, so that the needle cover 23 can guide the engaging portions 114 of the actuating sleeve 11 to engage with the corresponding engaging portions 232 after moving toward the actuating assembly 10, so that the needle cover 23 and the actuating sleeve 11 are interlocked. Here, the corresponding connecting portions 232 are two open holes symmetrically disposed in cooperation with the connecting portions 114.

In one embodiment of the present creation, the containment assembly 20 further includes a backing ring 24. The rim 24 is disposed at an end of the vial sleeve 22 adjacent to the actuating assembly 10 such that the vial 30 may be mounted and injection buffered by the rim 24 when the vial 30 is mounted in the vial sleeve 22 of the receiving assembly 20.

In addition, in one embodiment of the present disclosure, the accommodating component 20 further includes an extension component 25 and a cover 26. An extension member 25 is disposed at an opposite end of the receiving assembly 20 from the actuating assembly 10, and the extension member 25 is secured to the vial sleeve 22. The cover 26 is used to close the opposite end of the housing 21 of the receiving assembly 20 combined with the actuating assembly 10, so that the auto-injector 1 of the present invention can avoid the needle cover 23 exposed out of the housing 21 from being touched by mistake through the cover 26 when not in use.

In the assembling process of the automatic injector 1 of the present invention, the medicine bottle 30 is first installed in the medicine bottle sleeve 22 of the accommodating component 20, and at this time, the cover body 26 of the accommodating component 20 closes one end of the outer shell 21, which exposes the needle cover 23; then, the actuating assembly 10 is coupled to the other end of the accommodating assembly 20. Accordingly, the automatic injector 1 of the present invention is assembled.

Referring now to fig. 1 to 6, when a user wants to use the automatic injector 1 of the present invention, the cover 26 is first removed from the outer housing 21, so that the needle cover 23 is exposed; then, the automatic injector 1 of the present invention is pressed against the body part to be injected with one end of the exposed needle cover 23, and the outer housing 21 is held by hand to apply a force to the skin, so that the needle cover 23 moves inward toward the outer housing 21. At this time, the end of the needle cover 23 adjacent to the actuating assembly 10 pushes against the actuating sleeve 11, so that the actuating sleeve 11 is actuated to move along the direction of the axis L relative to the actuating sleeve 12, and the first elastic element 13 is gradually compressed. The moved actuating sleeve 11 will release the restriction on the cantilever arms 121 of the actuating sleeve 12, causing the cantilever arms 121 to spring out in a direction away from the axis L, causing the flared portions 1212 of the cantilever arms 121 to spring against the needle cover 23 to make a click sound, thereby indicating to the user that the injection procedure has been initiated, in compliance with the standards of medical regulations. Then, the locking portion 1211 of the cantilever 121 disengages from the groove 151 of the pushing rod 15, so that the pushing rod 15 is actuated to move toward the medicine bottle 30 by the compressed second elastic member 16 under an interference-free condition, and further pushes the plunger in the medicine bottle 30 to drive the medicine to be output toward the needle portion. After the injection is completed, the user removes the body of the automatic injector 1, and the actuating sleeve 11 returns to the original position by the elastic restoring force of the first elastic member 13, and drives the needle cover 23 to move and expose out of the outer casing 21 again to conceal the needle head of the medicine bottle 30.

Although the embodiments of the present disclosure have been described above, it should be understood that various changes in the form, construction, features, methods and quantities described in the claims may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and therefore the scope of the present disclosure should not be limited by the claims appended hereto.

Claims (10)

1. An actuating assembly for an automatic injector for use in conjunction with a container assembly housing a vial, the actuating assembly comprising:

an actuating sleeve including a channel;

the execution sleeve is movably arranged in the channel in a penetrating way along an axis and comprises two symmetrical cantilevers, and each cantilever comprises a clamping part;

the two ends of the first elastic piece are respectively abutted against the actuating sleeve and the actuating sleeve;

the rear cover is combined with one end of the execution sleeve;

the push rod is movably arranged in the execution sleeve in a penetrating way along the axis and comprises two grooves; the two ends of the second elastic piece are respectively abutted against the rear cover and the push rod;

wherein when the cantilever of the actuation sleeve is constrained within the channel of the actuation sleeve, the detent of the cantilever snaps into the groove of the pushrod to limit movement of the pushrod; when the actuating sleeve moves relative to the actuating sleeve along the axial direction, the first elastic piece is gradually compressed to enable the clamping portion of the cantilever of the actuating sleeve to be disengaged from the groove of the push rod, and the push rod is actuated to move towards the medicine bottle through the compressed second elastic piece.

2. The actuating assembly of an automatic injector of claim 1, wherein said actuating sleeve includes a flange portion disposed on an outer surface of said actuating sleeve, and said actuating sleeve further includes a plurality of catch portions; two ends of the first elastic piece are respectively abutted against the flange part of the actuating sleeve and the plurality of clamping parts of the actuating sleeve.

3. The actuating assembly of an auto-injector of claim 2, wherein the actuating sleeve further comprises a plurality of grooves through which the plurality of catches of the actuating sleeve pass to project from an outer surface of the actuating sleeve, and the plurality of catches move along the plurality of grooves as the actuating sleeve moves relative to the actuating sleeve.

4. The actuating assembly of an automatic injector of claim 1, wherein the actuating sleeve further comprises a plurality of snap-fit portions and the back cover further comprises a plurality of snap-fit members correspondingly snap-fit to the plurality of snap-fit portions.

5. The actuating assembly of an automatic injector of claim 1, wherein the rearward cap includes a plurality of guides and the actuation sleeve further includes a plurality of corresponding guides; when the back cover moves relative to the actuation sleeve, the back cover moves relative to the actuation sleeve along the axis by the plurality of guides engaging the plurality of corresponding guides.

6. The actuating assembly of an automatic injector of claim 1, wherein said actuating sleeve further comprises at least one stop structure, and said at least one stop structure is raised above a surface of said channel.

7. The actuating assembly of an automatic injector of claim 6, wherein each of said cantilevered arms further includes a flared portion that correspondingly snaps into said at least one stop structure.

8. The actuating assembly of an automatic injector of claim 6, wherein the actuating sleeve further comprises at least one secondary mounting hole extending through the channel from an outer surface of the actuating sleeve, the at least one secondary mounting hole being located between an end of the actuating sleeve adjacent the rear cap and the at least one stop structure.

9. An automatic injector for receiving and injecting a vial, the automatic injector comprising:

an actuating assembly according to any one of claims 1 to 8; and

a housing assembly coupled to an end of the actuating assembly, the housing assembly comprising:

an outer casing;

a medicine bottle sleeve which is combined with the outer shell and is used for installing the medicine bottle; and

the needle cover penetrates through and is partially exposed out of the outer shell, and the needle cover can move relative to the outer shell and the medicine bottle sleeve;

when the needle cover moves towards the outer shell under the action of external force, the needle cover pushes against the actuating sleeve of the actuating component, so that the clamping part of the cantilever of the actuating sleeve is separated from the groove of the push rod, and the push rod is actuated through the compressed second elastic piece to enable the push rod to move towards the medicine bottle so as to finish injection.

10. The automatic injector of claim 9, wherein said receiving assembly further comprises a grommet disposed at an end of said vial sleeve adjacent said actuator assembly.

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