Sound-generating components, excitation mechanism, and injection pen

Abstract

This utility model belongs to the field of injection pen technology, specifically relating to a sound-generating component, including: an end cap inserted into the rear end of the upper pen body; a fixing sleeve inserted into the end cap, the side wall of the fixing sleeve having a sliding groove; a striking sleeve inserted into the fixing sleeve, the side wall of the striking sleeve having a striking block, the striking block being inserted into the sliding groove, and a striking spring provided at the front end of the striking block, the striking spring being adapted to push the striking block along the sliding groove to the rear end after the injection pen is activated, so as to strike the front end wall of the end cap to generate sound; in short, a striking block is provided on the side wall of the striking sleeve and is slidably disposed in the sliding groove, after the injection pen is activated, the striking spring is released to push the striking block to strike the front end wall of the end cap to generate sound, ensuring accurate sound generation after injection is completed.

Description

Technical Field

[0001] This utility model belongs to the field of injection pen technology, specifically relating to a sound-generating component, an excitation mechanism, and an injection pen. Background Technology

[0002] Injection pens reduce the difficulty of injection treatment and reduce patient pain, thus gaining popularity among many medical professionals and patients. Existing injection pens typically include a sound-emitting component and an activation mechanism. When the activation mechanism activates the injection pen, it simultaneously triggers the sound-emitting component to emit sound, making it impossible for users to determine whether the injection has been completed based on the sound.

[0003] Therefore, how to prevent users from being unable to determine whether the injection has been completed based on the sound produced is a technical problem that urgently needs to be solved in this field.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0005] This disclosure provides at least one sound-generating component, an excitation mechanism, and an injection pen.

[0006] In a first aspect, embodiments of this disclosure provide a sound-generating component, comprising: an end cap inserted into the rear end of an upper pen body; a fixing sleeve inserted into the end cap, the side wall of the fixing sleeve having a sliding groove; a striking sleeve inserted into the fixing sleeve, the side wall of the striking sleeve having a striking block, the striking block being inserted into the sliding groove; and a striking spring provided at the front end of the striking block, the striking spring being adapted to push the striking block to slide along the sliding groove toward the rear end after the injection pen is activated, so as to strike the front end wall of the end cap to generate sound.

[0007] In one optional embodiment, the end cap has a countersunk hole for mounting, and the side wall of the countersunk hole has a notch for insertion; the side wall of the fixing sleeve is provided with a snap-fit, and the snap-fit ​​is engaged in the notch for fixing the fixing sleeve and the end cap.

[0008] In one alternative embodiment, the striking block strikes the front end wall of the mounting countersunk hole to produce sound.

[0009] In one alternative embodiment, the sliding groove extends through the rear end of the fixed sleeve; the striking block extends out of the sliding groove.

[0010] In one alternative embodiment, the side wall of the end cap is provided with a snap-fit ​​to engage with the snap-fit ​​notch in the upper pen body.

[0011] Secondly, this disclosure also provides an excitation mechanism, comprising: the aforementioned sound-generating component, wherein a limiting rod is integrally provided on the end cap, and a push rod is sleeved on the limiting rod; and an excitation spring is provided in the gap between the limiting rod and the push rod, the two ends of the excitation spring respectively abutting against the end cap and the push rod, so that the push rod always tends to slide towards the front end; a limiting buckle is provided on the side wall of the striking sleeve, the limiting buckle being adapted to engage the push rod, so that the side wall of the striking sleeve... The striking block of the wall always abuts against the bottom of the sliding groove; a sliding sleeve is sleeved on the striking sleeve, and a striking spring is sleeved on the sliding sleeve, the end of the striking spring always abuts against the striking block; and the sliding sleeve is adapted to slide rearward to compress the striking spring while releasing the limiting buckle from the push rod, so that pushing the push rod actuates and completing the injection. After that, the striking block slides rearward under the action of the striking spring to strike the front end wall of the end cap to produce a sound.

[0012] In one optional embodiment, the side wall of the striking sleeve has a notch for a limiting spring, and the limiting buckle is disposed at the end of the limiting spring; the side wall of the push rod has a limiting notch, wherein; when the sliding sleeve is in the initial position, the inner wall of the sliding sleeve presses against the limiting buckle, so that the limiting buckle engages with the limiting notch to engage the push rod, while the striking block always abuts against the bottom of the sliding groove; when the sliding sleeve slides to the rear end, the inner wall of the sliding sleeve moves away from the limiting buckle, so that the limiting buckle slides out of the limiting notch, and the push rod is released to activate.

[0013] In one optional embodiment, an auxiliary protrusion is provided on the outer side of the limiting buckle; wherein, when the sliding sleeve slides rearward to abut against the fixed sleeve, the inner wall of the sliding sleeve moves away from the limiting buckle, and the limiting buckle is pushed by the side wall of the push rod, so that the auxiliary protrusion abuts against the end of the sliding sleeve, thereby limiting the striking sleeve; and when the side wall of the push rod moves away from the limiting buckle, the auxiliary protrusion springs inward to release the limiting of the striking sleeve, and the striking block is pushed rearward by the striking spring to strike the end cap and produce a sound.

[0014] In one alternative embodiment, an excitation sleeve is further included, which is slidably disposed within the lower pen body. The rear end of the excitation sleeve always abuts against the sliding sleeve, and the excitation sleeve always extends out of the lower pen body. The extended end of the excitation sleeve is adapted to be squeezed to slide rearward, thereby driving the sliding sleeve.

[0015] Thirdly, this disclosure also provides an injection pen, comprising: an upper pen body; a lower pen body inserted into the front end of the upper pen body; a vial assembly inserted into the lower pen body, wherein the needle of the vial assembly always extends out of the lower pen body; and the aforementioned activation mechanism, wherein the push rod is aligned with the rubber stopper of the vial assembly.

[0016] The beneficial effect of this utility model is that the sound-generating component, the excitation mechanism and the injection pen are provided with a striking block on the side wall of the striking sleeve and the striking block is slidably disposed in the sliding groove. After the injection pen is excited, the striking spring is released to push the striking block to strike the front end wall of the end cap to generate sound, thus ensuring accurate sound generation after the injection is completed.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A perspective view of an injection pen provided in an embodiment of this disclosure;

[0021] Figure 2 A cross-sectional view of an injection pen provided in an embodiment of this disclosure;

[0022] Figure 3 A state diagram of the striking sleeve during the excitation process of the push rod, provided by an embodiment of this disclosure;

[0023] Figure 4 This is a diagram showing the state of a striking sleeve after the push rod has completed activation, as provided in an embodiment of this disclosure.

[0024] Figure 5 An exploded view of a sound-generating component provided in an embodiment of this disclosure.

[0025] In the picture:

[0026] 1. End cap; 11. Mounting countersunk hole; 12. Insertion notch; 13. Limiting rod; 13a. Release spring; 14. Front end wall;

[0027] 2. Fixed sleeve; 21. Sliding groove; 22. Insertion buckle;

[0028] 3. Striking sleeve; 31. Striking block; 32. Limiting buckle; 32a. Auxiliary protrusion; 33. Limiting spring;

[0029] 4. Push rod; 41. Limiting notch;

[0030] 5. Sliding sleeve; 51. Striking spring;

[0031] 6. Excitation sleeve;

[0032] 7. Upper pen body; 8. Lower pen body; 9. Medicine bottle assembly. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0035] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0036] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0037] Research has revealed that in existing technologies, the sound emitted by injection pens is generated synchronously with the excitation process, making it impossible to accurately determine whether the injection has been completed. This is the problem and objective that the utility model aims to solve.

[0038] Based on the above research, this disclosure provides a sound-generating component, an excitation mechanism, and an injection pen. After the injection pen is activated, the striking spring is released to push the striking block to strike the front end wall of the end cap to generate sound, ensuring accurate sound generation after injection.

[0039] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as contributions made by the utility model inventor to this disclosure.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] See Figures 1 to 5The illustration shows a sound-generating assembly, comprising: an end cap 1, which is inserted into the rear end of an upper pen body 7 (in this application, the part near the end cap is the rear end); a fixing sleeve 2, which is inserted into the end cap 1, and the side wall of the fixing sleeve 2 has a sliding groove 21; a striking sleeve 3, which is inserted into the fixing sleeve 2, and the side wall of the striking sleeve 3 is provided with a striking block 31, the striking block 31 being inserted into the sliding groove 21; and the front end of the striking block 31 (in this application, the part near the needle is the front end). The end cap 1 is provided with a striking spring 51, which is adapted to push the striking block 31 to slide along the sliding groove 21 to the rear end after the injection pen is activated, so as to strike the front end wall 14 of the end cap 1 to produce sound; in short, the striking block 31 is provided on the side wall of the striking sleeve 3 and is slidably disposed in the sliding groove 21. After the injection pen is activated, the striking spring 51 is released to push the striking block 31 to strike the front end wall 14 of the end cap 1 to produce sound, ensuring accurate sound production after injection is completed.

[0043] In some embodiments, the end cap 1 has a countersunk hole 11, and the side wall of the countersunk hole 11 has an insertion notch 12; the side wall of the fixing sleeve 2 is provided with an insertion buckle 22, and the insertion buckle 22 is engaged in the insertion notch 12 to fix the fixing sleeve 2 and the end cap 1; in short, the insertion buckle 22 is engaged in the insertion notch 12, and the detachable connection between the fixing sleeve 2 and the end cap 1 is completed, which is simple and reliable.

[0044] In some embodiments, the striking block 31 strikes the front end wall 14 of the mounting countersunk hole 11 to produce sound; the sliding groove 21 penetrates the rear end of the fixing sleeve 2; the striking block 31 extends out of the sliding groove 21; in short, the striking block 31 extends out of the sliding groove 21 to stably strike the front end wall 14 of the mounting countersunk hole 11, producing a crisp sound and improving recognizability; furthermore, the sliding groove 21 penetrates the rear end of the fixing sleeve 2 so that the striking block 31 can be inserted from the rear end of the fixing sleeve 2 for easy installation and portability.

[0045] In some embodiments, the side wall of the end cap 1 is provided with a snap-fit ​​22 to engage with the snap-fit ​​notch 12 of the upper pen body 7; in short, the end cap 1 and the upper pen body 7 are detachably connected through the snap-fit ​​22 and the snap-fit ​​notch 12.

[0046] See Figures 1 to 5An excitation mechanism is shown, comprising: the aforementioned sound-generating assembly; a limiting rod 13 integrally provided on the end cap 1, and a push rod 4 sleeved on the limiting rod 13; and an excitation spring 13a disposed between the limiting rod 13 and the push rod 4, the two ends of the excitation spring 13a respectively abutting the end cap 1 and the push rod 4, so that the push rod 4 always tends to slide towards the front end; a limiting buckle 32 provided on the side wall of the striking sleeve 3, the limiting buckle 32 being adapted to engage the push rod 4, so that the striking block 31 on the side wall of the striking sleeve 3 always abuts the bottom of the sliding groove 21; a sliding sleeve 5 sleeved on the striking sleeve 3, a striking spring 51 sleeved on the sliding sleeve 5, the end of the striking spring 51 always abutting the striking block 31; and the aforementioned... The sliding sleeve 5 is adapted to slide rearward to compress the striking spring 51 and simultaneously release the engagement between the limiting buckle 32 and the push rod 4, thereby activating the push rod 4. After injection, the striking block 31 slides rearward under the drive of the striking spring 51 to strike the front end wall 14 of the end cap 1 to produce sound. In short, the push rod 4 always tends to slide forward due to the activation spring 13a. At the same time, since the limiting buckle 32 engages the push rod 4, the striking block 31 striking the side wall of the sleeve 3 can always abut against the bottom of the sliding groove 21. When the sliding sleeve 5 slides rearward, the engagement between the limiting buckle 32 and the push rod 4 is released. After injection (i.e., after the push rod 4 is completely released), the striking block 31 striking the side wall of the sleeve 3 slides rearward to strike the front end wall 14 of the end cap to produce sound.

[0047] In some embodiments, the side wall of the striking sleeve 3 is provided with a notch to accommodate a limiting spring 33, and the limiting buckle 32 is disposed at the end of the limiting spring 33; the side wall of the push rod 4 is provided with a limiting notch 41, wherein; when the sliding sleeve 5 is in the initial position, the inner wall of the sliding sleeve 5 presses against the limiting buckle 32, so that the limiting buckle 32 engages with the limiting notch 41 to engage the push rod 4, while the striking block 31 always abuts against the bottom of the sliding groove 21; when the sliding... When the sleeve 5 slides to the rear end, the inner wall of the sliding sleeve 5 leaves the limiting buckle 32, so that the limiting buckle 32 slides out of the limiting notch 41, and the push rod 4 is released to activate; in short, when the sliding sleeve 5 is in the initial position, the inner wall of the sliding sleeve 5 presses against the limiting buckle 32, so that the limiting buckle 32 engages with the limiting notch 41, thereby activating the push rod 4. When the sliding sleeve 5 slides to the rear end along with the activating sleeve 6, the side wall of the sliding sleeve 5 leaves the limiting buckle 32, thereby releasing the push rod 4 from activation.

[0048] In some embodiments, an auxiliary protrusion 32a is provided on the outer side of the limiting buckle 32; wherein, when the sliding sleeve 5 slides rearward to abut against the fixed sleeve 2, the inner wall of the sliding sleeve 5 leaves the limiting buckle 32, and the limiting buckle 32 is pushed by the side wall of the push rod 4, so that the auxiliary protrusion 32a abuts against the end of the sliding sleeve 5, thereby limiting the striking sleeve 3; and when the side wall of the push rod 4 leaves the limiting buckle 32, the auxiliary protrusion 32a springs inward (the striking spring 51 pushes the striking sleeve 3 to slide rearward), thereby releasing the limiting of the striking sleeve 3, and the striking block 3 1 is pushed to the rear end by the striking spring 51 to strike the end cap 1 and produce sound; in short, in order to prevent the striking sleeve 3 from sliding to the rear end when the side wall of the sliding sleeve 5 just leaves the limiting buckle 32, an auxiliary protrusion 32a is provided on the outside of the limiting buckle 32; when the sliding sleeve 5 slides to the rear end to abut against the fixed sleeve 2, the push rod 4 is released from the fastening, and the side wall of the push rod 4 presses against the limiting buckle 32 so that the auxiliary protrusion 32a abuts against the end of the sliding sleeve 5, preventing the striking sleeve 3 from sliding to the rear end, until the push rod 4 leaves the auxiliary protrusion 32a (i.e. after the injection is completed), so that the auxiliary protrusion 32a moves inward, so that the striking sleeve 3 slides to the rear end and produces sound.

[0049] In some embodiments, an excitation sleeve 6 is further included, which is slidably disposed within the lower pen body 8. The rear end of the excitation sleeve 6 always abuts against the sliding sleeve 5, and the excitation sleeve 6 always extends out of the lower pen body 8. The extended end of the excitation sleeve 6 is adapted to be squeezed to slide rearward, thereby driving the sliding sleeve 5. In short, the excitation sleeve 6 is slidably disposed within the lower pen body 8, and its end always extends out of the lower pen body 8. When injection is performed, the excitation sleeve 6 is squeezed to slide rearward to complete the excitation of the excitation mechanism.

[0050] See Figures 1 to 5 The image shows an injection pen comprising: an upper pen body 7; a lower pen body 8 inserted into the front end of the upper pen body 7; a vial assembly 9 inserted into the lower pen body 8, wherein the needle of the vial assembly 9 always extends out of the lower pen body 8; and the aforementioned activation mechanism, wherein the push rod 4 is aligned with the rubber stopper of the vial assembly 9.

[0051] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0053] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0054] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0055] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sound producing assembly, characterized by, include: End cap (1), which is inserted into the rear end of the upper pen body (7); A fixed sleeve (2) is inserted into the end cap (1), and a sliding groove (21) is provided on the side wall of the fixed sleeve (2). A striking sleeve (3) is inserted into the fixed sleeve (2), and a striking block (31) is provided on the side wall of the striking sleeve (3). The striking block (31) is inserted into the sliding groove (21), and... The front end of the striking block (31) is provided with a striking spring (51). The striking spring (51) is adapted to push the striking block (31) to slide along the sliding groove (21) to the rear end after the injection pen is activated, so as to strike the front end wall (14) of the end cap (1) to produce sound.

2. The sound-generating component as described in claim 1, characterized in that, The end cap (1) has a mounting countersunk hole (11), and the side wall of the mounting countersunk hole (11) has an insertion notch (12). The side wall of the fixed sleeve (2) is provided with a plug-in buckle (22), which is engaged in the plug-in notch (12) to fix the fixed sleeve (2) and the end cap (1).

3. The sound-generating component as described in claim 2, characterized in that, The striking block (31) strikes the front end wall (14) of the mounting countersunk hole (11) to produce sound.

4. The sound-generating component as described in claim 2, characterized in that, The sliding groove (21) passes through the rear end of the fixed sleeve (2); The striking block (31) extends out of the sliding groove (21).

5. The sound-generating component as described in claim 4, characterized in that, The end cap (1) is provided with a plug-in buckle (22) on its side wall to be fastened into the plug-in notch (12) of the upper pen body (7).

6. An excitation mechanism, characterized in that, include: The sound-generating assembly as described in any one of claims 1-5, wherein the end cap (1) is integrally provided with a limiting rod (13), and a push rod (4) is sleeved on the limiting rod (13); and, A triggering spring (13a) is provided in the gap between the limiting rod (13) and the push rod (4). The two ends of the triggering spring (13a) abut against the end cap (1) and the push rod (4) respectively, so that the push rod (4) always has a tendency to slide towards the front end. The side wall of the striking sleeve (3) is provided with a limit buckle (32), which is adapted to engage the push rod (4) so ​​that the striking block (31) on the side wall of the striking sleeve (3) always abuts against the bottom of the sliding groove (21). A sliding sleeve (5) is fitted onto the striking sleeve (3), and a striking spring (51) is fitted onto the sliding sleeve (5), the end of which always abuts against the striking block (31); and, The sliding sleeve (5) is adapted to slide to the rear end to compress the striking spring (51) and simultaneously release the locking buckle (32) from the push rod (4), so that the push rod (4) is activated and the injection is completed. After that, the striking block (31) slides to the rear end under the action of the striking spring (51) to strike the front end wall (14) of the end cap (1) to produce a sound.

7. The excitation mechanism as described in claim 6, characterized in that, The side wall of the striking sleeve (3) is provided with a notch to provide a limiting spring (33), and the limiting buckle (32) is provided at the end of the limiting spring (33); The side wall of the push rod (4) has a limiting notch (41), wherein; When the sliding sleeve (5) is in the initial position, the inner wall of the sliding sleeve (5) presses against the limiting buckle (32) so that the limiting buckle (32) is engaged in the limiting notch (41) to engage the push rod (4), while the striking block (31) always abuts against the bottom of the sliding groove (21); When the sliding sleeve (5) slides to the rear end, the inner wall of the sliding sleeve (5) leaves the limiting buckle (32), so that the limiting buckle (32) slides out of the limiting notch (41), and the push rod (4) is released to activate.

8. The excitation mechanism as described in claim 7, characterized in that, The outer side of the limiting buckle (32) is provided with an auxiliary protrusion (32a); wherein, When the sliding sleeve (5) slides to the rear end to abut against the fixed sleeve (2), the inner wall of the sliding sleeve (5) moves away from the limiting buckle (32), and the limiting buckle (32) is pushed by the side wall of the push rod (4), so that the auxiliary protrusion (32a) abuts against the end of the sliding sleeve (5), thereby limiting the striking sleeve (3), and, When the side wall of the push rod (4) leaves the limiting buckle (32), the auxiliary protrusion (32a) springs inward to release the limiting of the striking sleeve (3), and the striking block (31) is pushed to the rear end by the striking spring (51) to strike the end cap (1) and make a sound.

9. The excitation mechanism as described in claim 8, characterized in that, It also includes an excitation sleeve (6), which is slidably disposed within the lower pen body (8). The rear end of the excitation sleeve (6) always abuts against the sliding sleeve (5), and the excitation sleeve (6) always extends out of the lower pen body (8). The extended end of the excitation sleeve (6) is adapted to be squeezed to slide towards the rear end, thereby driving the sliding sleeve (5).

10. An injection pen, characterized in that, include: Upper pen body (7); The lower pen body (8) is inserted into the front end of the upper pen body (7); The vial assembly (9) is inserted into the lower pen body (8), and the needle of the vial assembly (9) always extends out of the lower pen body (8). The activating mechanism as described in any one of claims 6-9, wherein the push rod (4) is aligned with the rubber stopper of the vial assembly (9).

Images