Automatic injection pen

Abstract

The invention relates to the technical field of medical instruments, and discloses an automatic injection pen which comprises a shell, a needle cylinder, a plunger, a driving assembly, a first sound production part and a second sound production part. The needle cylinder is connected into the shell and can move in the first direction. The plunger is arranged in the shell, the length direction of the plunger is the same as the first direction, the plunger and the needle cylinder are arranged in the first direction, at least part of the plunger extends into the needle cylinder, and the plunger can move in the first direction; the first sound production part is connected to the plunger and located outside the needle cylinder; the second sound production component is arranged in the shell and located between the first sound production component and the needle cylinder in the first direction, in the actual application process, the plunger is driven by the driving assembly to move towards the side where the needle cylinder is located in the first direction so that medicine in the needle cylinder can be pushed out, and when the plunger moves to the preset position, the medicine in the needle cylinder can be pushed out. The first sound production part and the second sound production part are coupled and produce sound prompts, so that a patient can clearly know the injection progress.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to an automatic injection pen. Background Art

[0002] An automatic injection pen is a medical device used to assist in drug injection. The efficacy of many drugs is closely related to the accurate injection dose. For example, insufficient dose of insulin will have an adverse effect on the patient's blood sugar control. During the injection process, the patient cannot clearly know the injection progress. The patient may move the injection pen away from the injection site prematurely due to distraction, tension or inaccurate time control, which affects the efficacy. Therefore, in actual applications, it is particularly important to let the patient know the injection progress exactly. Summary of the invention

[0003] The primary purpose of the present invention is to provide an automatic injection pen capable of prompting injection progress.

[0004] In order to achieve the above-mentioned object, the present invention provides an automatic injection pen, comprising a housing, a syringe, a plunger, a drive assembly, a first sound-generating component and a second sound-generating component;

[0005] The housing has a first orientation;

[0006] The syringe is connected to the housing, and the syringe can move along the first direction;

[0007] The plunger is disposed in the housing, the length direction of the plunger is the same as the first direction, the plunger and the syringe are arranged along the first direction, and the plunger at least partially extends into the syringe, and the plunger can move along the first direction;

[0008] The driving assembly is connected to the housing, and is used to drive the plunger to move along the first direction toward the side where the syringe is located, so as to push out the medicine in the syringe;

[0009] The first sound-generating component is connected to the plunger, and the first sound-generating component is located outside the syringe;

[0010] The second sound-generating component is disposed in the housing, and in the first direction, the second sound-generating component is located between the first sound-generating component and the syringe;

[0011] Wherein, the second sound-emitting component is used to couple with the first sound-emitting component to emit a sound prompt.

[0012] In a specific embodiment of the present invention, the plunger comprises a cylinder and a pusher;

[0013] The length direction of the column is the same as the first direction, the column is arranged in the housing, and at least part of the column extends into the syringe;

[0014] The pushing member is detachably connected to the column, and the pushing member is located outside the syringe;

[0015] The first sound-generating component is connected to the outer circumferential surface of the column, and the second sound-generating component is connected to the pushing member;

[0016] In which, the driving assembly is used to drive the column to move along the first direction, and the pushing member is used to push the syringe to move from a first preset position to a second preset position along the first direction under the action of the driving assembly. When the syringe is located at the second preset position, the syringe is fixed, the pushing member is separated from the column, and the column continues to move under the action of the driving assembly to push out the medicine in the syringe.

[0017] In a specific embodiment of the present invention, the drive assembly includes a locking member and an elastic member, the locking member is connected to the shell, and in the first direction, the locking member is detachably connected to an end of the column away from the syringe, the elastic member is arranged in the shell, and the elastic member connects the shell and the column, and the elastic member is used to drive the column to move along the first direction after the locking member is separated from the column.

[0018] In a specific embodiment of the present invention, the first sound-emitting component has a guide slope, and a side of the first sound-emitting component facing away from the column and a side of the first sound-emitting component facing the syringe are connected through the guide slope, and the guide slope extends obliquely from the outside to the inside along the first direction, and an avoidance space is formed between the side of the first sound-emitting component facing away from the column and the inner wall surface of the shell;

[0019] The second sound-generating component comprises a connecting column and a buckle body, wherein the length direction of the connecting column is the same as the first direction, one end of the connecting column along the first direction is connected to a side of the pusher facing away from the syringe, and the other end is connected to the buckle body;

[0020] Among them, in the first direction, the buckle body is at least partially opposite to the guide slope surface, and in the radial direction of the column, there is a preset distance between the side of the connecting column facing away from the column and the inner wall surface of the shell, and the connecting column can be deformed toward the side where the inner wall surface of the shell is located under the action of the first sound-emitting component, and the avoidance space is used for the connecting column to pass through.

[0021] In a specific embodiment of the present invention, in the first direction, the elastic member is arranged on a side of the first sound-emitting component away from the second sound-emitting component, and one end of the elastic member along the first direction is connected to the column through the first sound-emitting component, and the other end is connected to the shell.

[0022] In a specific embodiment of the present invention, the elastic member is a spring, and the elastic member is sleeved on the outer circumference of the column;

[0023] The first sound-generating component is annular and is arranged around the axis of the cylinder;

[0024] In the radial direction of the column, the connecting column is arranged on an end of the pushing member away from the column.

[0025] In a specific embodiment of the present invention, the first sound-emitting component has a plurality of limiting portions, which are arranged on the outer wall surface of the first sound-emitting component at intervals around the axis of the column, and one end of the limiting portion away from the center of the first sound-emitting component is in contact with the inner wall surface of the shell, and the outer wall surface of the first sound-emitting component, the inner wall surface of the shell and the avoidance space are formed between the outer wall surface of the first sound-emitting component, the inner wall surface of the shell and two adjacent limiting portions.

[0026] In a specific embodiment of the present invention, the pushing member is annular and has a connecting portion, the connecting portion is located on the inner hole wall of the pushing member, the pushing member is sleeved on the outer circumference of the column, and the connecting portion is detachably connected to the column.

[0027] In a specific embodiment of the present invention, the plunger further comprises a limit block, the limit block is connected to the column, and the limit block is located at an end of the column away from the syringe in the first direction;

[0028] In the first direction, the elastic member is arranged on a side of the limit block away from the syringe, one end of the elastic member along the first direction is connected to the column through the limit block, and the other end is connected to the shell.

[0029] In a specific embodiment of the present invention, the elastic member is a spring, and the elastic member is sleeved on the outer circumference of the column;

[0030] There are multiple limit blocks, and the multiple limit blocks are arranged around the column at intervals, and a containing space is formed between two adjacent limit blocks;

[0031] The number of the first sound-generating components is at least two, and all the first sound-generating components are spaced around the column and evenly arranged in different accommodating spaces;

[0032] The outer wall surface of the column is provided with a snap-in groove;

[0033] The pusher is annular and sleeved on the outer circumference of the column;

[0034] The number of the second sound-emitting components is at least two, all of which are arranged at intervals around the center of the pushing member, and one second sound-emitting component corresponds to one first sound-emitting component. In the second sound-emitting components, the connecting column is arranged on the inner edge of the pushing member, the buckle body can be detachably clamped in the clamping groove, and the pushing member can be detachably connected to the column through the second sound-emitting component.

[0035] The automatic injection pen according to the embodiment of the present invention has the following beneficial effects compared with the prior art:

[0036] The automatic injection pen of the embodiment of the present invention, in actual application, drives the plunger to move along the first direction toward the side where the syringe is located through the driving assembly to push out the medicine in the syringe. Since the first sounding component is arranged on the plunger and is located outside the syringe, the second sounding component is arranged in the shell and is located between the first sounding component and the syringe in the first direction, that is, the second sounding component is arranged on the travel path of the plunger, and the function of the first sounding component is to couple with the second sounding component to issue a sound prompt. Therefore, when the plunger moves to the preset position, the first sounding component is coupled with the second sounding component and issues a sound prompt, thereby enabling the patient to clearly know the injection progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a front view of the automatic injection pen according to an embodiment of the present invention;

[0038] Figure 2 is an exploded schematic diagram of an automatic injection pen according to an embodiment of the present invention;

[0039] Figure 3 is a stereoscopic diagram of the cooperation between the plunger, the first sound-generating component and the housing according to an embodiment of the present invention;

[0040] Figure 4 is a stereoscopic diagram of the cooperation between the plunger, the first sound-generating component and the second sound-generating component according to an embodiment of the present invention;

[0041] Figure 5 It is a front view of the coupling state of the first sound-emitting component and the second sound-emitting component in an embodiment of the present invention;

[0042] Figure 6 is another stereoscopic diagram of the cooperation between the plunger, the first sound-generating component and the second sound-generating component according to an embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of a syringe in an embodiment of the present invention when it is in a first preset position;

[0044] Figure 8 It is a schematic diagram of the syringe in the embodiment of the present invention when it is in the second preset position.

[0045] In the figure, X, first direction; 1, shell; 2, syringe; 3, plunger; 31, column; 3101, snap-in groove; 3102, third limiting groove; 32, pushing member; 321, connecting part; 33, limiting block; 3301, second limiting groove; 4, driving assembly; 41, locking member; 42, elastic member; 5, first sound-emitting component; 501, guide slope; 502, first limiting groove; 51, limiting part; 6, second sound-emitting component; 61, connecting column; 62, buckle body; 100, avoidance space; 200, accommodating space. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] like Figures 1 to 8 As shown, an automatic injection pen according to an embodiment of the present invention comprises a housing 1, a syringe 2, a plunger 3, a driving assembly 4, a first sounding component 5 and a second sounding component 6; the housing 1 has a first direction X; the syringe 2 is connected to the housing 1, and the syringe 2 can move along the first direction X; the plunger 3 is arranged in the housing 1, the length direction of the plunger 3 is the same as the first direction X, the plunger 3 and the syringe 2 are arranged along the first direction X, and the plunger 3 at least partially extends into the syringe 2, and the plunger 3 can move along the first direction X; the driving assembly 4 is connected to the housing 1, and the driving assembly 4 is used to drive the plunger 3 to move along the first direction X toward the side where the syringe 2 is located to push out the medicine in the syringe 2; the first sounding component 5 is connected to the plunger 3, and the first sounding component 5 is located outside the syringe 2; the second sounding component 6 is arranged in the housing 1, and in the first direction X, the second sounding component 6 is located between the first sounding component 5 and the syringe 2; wherein the second sounding component 6 is used to couple with the first sounding component 5 to emit a sound prompt.

[0048] In actual application, the driving assembly 4 drives the plunger 3 to move along the first direction X toward the side where the syringe 2 is located to push out the medicine in the syringe 2. Since the first sounding component 5 is arranged on the plunger 3 and is located outside the syringe 2, the second sounding component 6 is arranged in the housing 1 and is located between the first sounding component 5 and the syringe 2 in the first direction X, that is, the second sounding component 6 is arranged on the travel path of the plunger 3, and the function of the first sounding component 5 is to couple with the second sounding component 6 to issue a sound prompt. Therefore, when the plunger 3 moves to the preset position, the first sounding component 5 is coupled with the second sounding component 6 and issues a sound prompt, thereby enabling The patient is clearly aware of the injection progress; illustratively, the first sounding component 5 and the second sounding component 6 are coupled after the plunger 3 squeezes out the medicine in the syringe 2 to issue a sound prompt. At this time, the injection progress prompted is that the automatic injection pen has completed the injection; in other embodiments, the first sounding component 5 and the second sounding component 6 can be coupled within a preset time before the injection is completed, or the two are coupled in the middle of the injection, which serves to prompt the corresponding injection progress; specifically, the coupling timing of the first sounding component 5 and the second sounding component 6 is determined by the distance between the two, and the distance is set according to the actual application, and the present application does not impose any restrictions on this.

[0049] In the present application, the housing 1 is cylindrical and has a simple structure. The operator can hold it in hand and the operation is convenient.

[0050] In this embodiment, if Figure 4 As shown, the plunger 3 includes a column 31 and a pusher 32; the length direction of the column 31 is the same as the first direction X, the column 31 is arranged in the housing 1, and the column 31 at least partially extends into the syringe 2; the pusher 32 is detachably connected to the column 31, and the pusher 32 is located outside the syringe 2; the first sounding component 5 is connected to the outer peripheral surface of the column 31, and the second sounding component 6 is connected to the pusher 32; wherein the driving assembly 4 is used to drive the column 31 to move along the first direction X, and the pusher 32 is used to push the cylinder 31 under the action of the driving assembly 4 The syringe 2 moves from the first preset position to the second preset position along the first direction X. When the syringe 2 is at the second preset position, the syringe 2 is fixed, the pusher 32 is separated from the column 31, and the column 31 continues to move under the action of the drive assembly 4 to push out the medicine in the syringe 2, while the pusher 32 stays at the position in contact with the syringe 2. When the column 31 continues to move and reaches the preset position, the first sounding component 5 is coupled with the second sounding component 6 and emits a sound prompt. Specifically, when the syringe 2 is at the first preset position, as shown in FIG. Figure 7 As shown, the syringe 2 is completely located in the housing 1. At this time, the needle of the syringe 2 will not be exposed outside the housing 1, and the automatic injection pen will not be accidentally injected when it is idle, thereby improving the safety of the automatic injection pen when it is not in use; and when the syringe 2 is in the second preset position, such as Figure 8As shown, the needle is exposed outside the housing 1, wherein the syringe 2 can be fixedly arranged by setting a limiting boss on the inner wall surface of the housing 1, and the automatic injection pen also includes a protective cover, such as Figure 7 As shown, the protective sleeve is slidably disposed in the shell 1, and a spring is connected between the protective sleeve and the shell 1. In actual application, when the protective sleeve contacts the skin and is continuously subjected to pressure toward the skin, the protective sleeve will retract into the shell 1, thereby allowing the needle to smoothly penetrate the skin to ensure a smooth injection process.

[0051] like Figure 2 As shown, the drive assembly 4 includes a locking member 41 and an elastic member 42. The locking member 41 is connected to the housing 1. In the first direction X, the locking member 41 is detachably connected to the end of the column 31 away from the syringe 2. The elastic member 42 is arranged in the housing 1, and the elastic member 42 connects the housing 1 and the column 31. The elastic member 42 is used to drive the column 31 to move along the first direction X after the locking member 41 is separated from the column 31; specifically, the locking member 41 includes a button and a locking claw. The locking claw fastens the column 31. Pressing the button can make the locking claw release the column 31. When the locking claw fastens the column 31, the housing 1 and the column 31 compress the elastic member 42 along the first direction X. Therefore, after the locking claw releases the column 31, the elastic member 42 elastically recovers, and the elastic member 42 drives the column 31 to move along the first direction X.

[0052] like Figure 3 and Figure 4As shown, the first sound-emitting component 5 has a guide slope 501, and the side of the first sound-emitting component 5 facing away from the cylinder 31 and the side of the first sound-emitting component 5 facing the syringe 2 are connected through the guide slope 501. The guide slope 501 extends obliquely from the outside to the inside along the first direction X, and an escape space 100 is formed between the side of the first sound-emitting component 5 facing away from the cylinder 31 and the inner wall surface of the shell 1; the second sound-emitting component 6 includes a connecting column 61 and a buckle body 62, and the length direction of the connecting column 61 is the same as the first direction X. One end of the connecting column 61 along the first direction X is connected to the side of the pusher 32 facing away from the syringe 2, and the other end is connected to the buckle body 62; wherein, in the first direction X, the buckle body 62 is at least partially opposite to the guide slope 501, and in the radial direction of the cylinder 31, the connecting column 61 is connected to the pusher 32. The buckle body 62 is connected to the guide slope 501. There is a preset distance between the side of the column 61 facing away from the column body 31 and the inner wall surface of the shell 1. The connecting column 61 can be deformed toward the side where the inner wall surface of the shell 1 is located under the action of the first sound-emitting component 5, and the avoidance space 100 is used for the connecting column 61 to pass through; specifically, the first sound-emitting component 5 and the second sound-emitting component 6 are both made of plastic. After the pusher 32 is separated from the column body 31, the column body 31 continues to move to the preset position. The buckle body 62 first contacts the guide slope 501, and then moves along the direction of the guide slope 501. During this process, the connecting column 61 will deform and bend toward the side where the inner wall surface of the shell 1 is located. After the buckle body 62 passes over the first sound-emitting component 5, at this time, the structural diagram of the cooperation between the first sound-emitting component 5 and the second sound-emitting component 6 is as shown in the figure Figure 5 As shown, since the buckle body 62 is no longer subjected to force, the connecting column 61 will elastically reset. During this process, the connecting column 61 will emit a prompt sound. This structure can achieve the emission of the prompt sound and can make full use of the space between the plunger 3 and the inner wall of the shell 1. The structure is compact and makes the structure of the automatic injection pen relatively simple and easy to process. The push member 32 plays a role in pushing the syringe 2 to move and cooperates with the second sound-emitting component 6 to emit a prompt sound. The push member 32 and the column 31 are detachably connected. Therefore, the push member 32 can be processed into the second sound-emitting component 6 at the same time during processing. The structure is simple and the processing is convenient. When the push member 32 is assembled on the column 31, the second sound-emitting component 6 can also be directly assembled in the shell 1. The assembly operation is simple.

[0053] In some other implementations, the second sound-emitting component 6 may be connected to the housing 1 , which is not limited in the present application.

[0054] In this embodiment, if Figure 2As shown, in the first direction X, the elastic member 42 is arranged on the side of the first sound-emitting component 5 away from the second sound-emitting component 6. One end of the elastic member 42 along the first direction X is connected to the column 31 through the first sound-emitting component 5, and the other end is connected to the shell 1. At this time, the first sound-emitting component 5 plays a role in connecting the elastic member 42 while emitting a prompt sound. This makes it unnecessary to set up an additional connecting structure for the automatic injection pen to connect the elastic member 42 to the column 31, and the automatic injection pen has the characteristic of compact structure.

[0055] like Figure 2 and Figure 4 As shown, the elastic member 42 is a spring, which is sleeved on the outer periphery of the column 31. The spring is used as the elastic member 42 for driving the column 31 to move. The structure is simple, the installation is convenient and the driving force is balanced. The first sound-emitting component 5 is annular, and the first sound-emitting component 5 is arranged around the axis of the column 31, thereby stably supporting the spring so that the column 31 can stably move along the first direction X under the drive of the elastic member 42. Preferably, the first sound-emitting component 5 is concave on one side facing away from the pushing member 32 to form a first limiting groove 502, and the spring is inserted into the first limiting groove 502, so that the connection between the spring and the first sound-emitting component 5 can be more stable. At this time, in the radial direction of the column 31, the connecting column 61 is arranged on the end of the pushing member 32 away from the column 31, thereby ensuring that the first sound-emitting component 5 and the second sound-emitting component 6 can be smoothly coupled.

[0056] Further, such as Figure 3 and Figure 4 As shown, the first sound-emitting component 5 has a plurality of limiting portions 51, and the plurality of limiting portions 51 are arranged on the outer wall surface of the first sound-emitting component 5 at intervals around the axis of the column 31. The end of the limiting portion 51 away from the center of the first sound-emitting component 5 contacts the inner wall surface of the shell 1, and an escape space 100 is formed between the outer wall surface of the first sound-emitting component 5, the inner wall surface of the shell 1, and two adjacent limiting portions 51. Based on the setting of the limiting portion 51, the first sound-emitting component 5 can always maintain contact with the inner wall surface of the shell 1, thereby preventing the column 31 from deviating from the central axis of the automatic injection pen, so that the column 31 can smoothly squeeze out the liquid in the syringe 2.

[0057] like Figure 4As shown, the pushing member 32 is annular and has a connecting portion 321, which is located on the inner hole wall of the pushing member 32. The pushing member 32 is sleeved on the outer periphery of the column 31, and the connecting portion 321 is detachably connected to the column 31, wherein the connecting portion 321 can be a card block, and a card slot is provided on the column 31, and the card block can be detachably connected to the card slot. When the pushing member 32 is subjected to force, the card block can be separated from the card slot. In this way, the pushing member 32 and the column 31 are detachably connected, the structure is simple and reliable, and the processing is convenient; in other embodiments, the connecting portion 321 can be a weak part, and the weak part can be broken when subjected to force. Based on this, the detachable connection between the pushing member 32 and the column 31 can also be achieved.

[0058] In the present application, another implementation of the plunger 3 is as follows Figure 6 As shown, the plunger 3 also includes a limit block 33, which is connected to the column 31, and the limit block 33 is located on one end of the column 31 away from the syringe 2 in the first direction X; in the first direction X, the elastic member 42 is arranged on the side of the limit block 33 away from the syringe 2, and one end of the elastic member 42 along the first direction X is connected to the column 31 through the limit block 33, and the other end is connected to the shell 1. At this time, the first sound-emitting component 5 does not play a role in connecting the elastic member 42, thereby, the connection between the column 31 and the elastic member 42 can also be achieved.

[0059] Similarly, the elastic member 42 is also a spring, and the elastic member 42 is sleeved on the outer periphery of the column 31; based on this, the number of the limit blocks 33 is multiple, and the multiple limit blocks 33 are arranged at intervals around the column 31 to stably support the spring, and a accommodating space 200 is formed between two adjacent limit blocks 33, and the number of the first sound-emitting components 5 is at least two, and all the first sound-emitting components 5 are arranged at intervals around the column 31 and are evenly arranged in different accommodating spaces 200, that is, the first sound-emitting components 5 and the limit blocks 33 are arranged circumferentially around the column 31, and the space occupied by the two in the first direction X is relatively small, and the structure is compact; the outer wall surface of the column 31 is provided with a clamping groove 3101; the pushing member 32 is annular, and the pushing member 32 is sleeved on the outer periphery of the column 31; the number of the second sound-emitting components 6 is at least two, and all the second sound-emitting components 6 are arranged at intervals around the center of the pushing member 32, and one second sound-emitting component 6 corresponds to one first sound-emitting component 5. In the second sound-emitting component 6, the connecting column 61 is arranged on the pushing member 3 2, the buckle body 62 can be detachably snapped into the snap-in groove 3101, and the push member 32 can be detachably connected to the column 31 through the second sound-emitting component 6. At this time, the second sound-emitting component 6 not only cooperates with the first sound-emitting component 5 to emit a prompt sound, but also makes the push member 32 detachably connected to the column 31, which can simplify the structure of the push member 32 and facilitate production. In addition, since the second sound-emitting component 6 is arranged on the inner edge of the push member 32, and the distance between the inner edge of the push member 32 and the inner wall surface of the shell 1 is relatively large, the cross-sectional area of ​​the connecting column 61 perpendicular to the first direction X can be increased to improve the rigidity of the connecting column 61, so that during the reset process of the second sound-emitting component 6 after coupling with the first sound-emitting component 5, the impact force of the connecting column 61 on the first sound-emitting component 5 will be greater, and the connecting column 61 will not reduce the impact force. Therefore, the prompt sound emitted by the second sound-emitting component 6 when coupled with the first sound-emitting component 5 will be louder, and the prompt effect will be obvious.

[0060] Preferably, a surface of each limiting block 33 facing away from the pushing member 32 is concave to form a second limiting groove 3301, and a spring is inserted into the second limiting groove 3301, which can make the arrangement of the spring more stable.

[0061] Further, such as Figure 6As shown, a third limiting groove 3102 is provided on the column 31, and the third limiting groove 3102 extends along the first direction X, the first sound-emitting component 5 is arranged in the third limiting groove 3102, and the clamping groove 3101 is also arranged in the third limiting groove 3102, at this time, the buckle body 62 of the second sound-emitting component 6 is inserted in the third limiting groove 3102, and the setting of the third limiting groove 3102 can guide the second sound-emitting component 6 to move relative to the column 31 along the first direction X, thereby enabling the first sound-emitting component 5 and the second sound-emitting component 6 to couple smoothly to emit a prompt sound; wherein, a first sound-emitting component 5, a second sound-emitting component 6 cooperate with a third limiting groove 3102, and the number of the third limiting grooves 3102 is set according to the number of the first sound-emitting component 5 and the second sound-emitting component 6, and the present application will not make too many elaborations on this.

[0062] In the present application, the housing 1 is also provided with a viewing window, which is directly opposite to the syringe 2, so that the user can observe through the viewing window whether the medicine in the syringe 2 has been injected, which can make the use of the automatic injection pen more convenient.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic injection pen, characterized in that: It comprises a housing (1), a syringe (2), a plunger (3), a drive assembly (4), a first sound-generating component (5) and a second sound-generating component (6); The housing (1) has a first direction (X); The syringe (2) is connected to the housing (1), and the syringe (2) is movable along the first direction (X); The plunger (3) is arranged in the housing (1), the length direction of the plunger (3) is the same as the first direction (X), the plunger (3) and the syringe (2) are arranged along the first direction (X), and the plunger (3) at least partially extends into the syringe (2), and the plunger (3) is movable along the first direction (X); The driving assembly (4) is connected to the housing (1), and is used to drive the plunger (3) to move along the first direction (X) toward the side where the syringe (2) is located, so as to push out the medicine in the syringe (2); The first sound-generating component (5) is connected to the plunger (3), and the first sound-generating component (5) is located outside the syringe (2); The second sound-emitting component (6) is disposed in the housing (1), and in the first direction (X), the second sound-emitting component (6) is located between the first sound-emitting component (5) and the syringe (2); Wherein, the second sound-emitting component (6) is used to couple with the first sound-emitting component (5) to emit a sound prompt.

2. The automatic injection pen according to claim 1, characterized in that: The plunger (3) comprises a column (31) and a pushing member (32); The length direction of the column (31) is the same as the first direction (X), the column (31) is arranged in the housing (1), and at least a portion of the column (31) extends into the syringe (2); The pushing member (32) is detachably connected to the column (31), and the pushing member (32) is located outside the syringe (2); The first sound-generating component (5) is connected to the outer peripheral surface of the column (31), and the second sound-generating component (6) is connected to the pushing member (32); The driving assembly (4) is used to drive the column (31) to move along the first direction (X), and the pushing member (32) is used to push the syringe (2) to move from a first preset position to a second preset position along the first direction (X) under the action of the driving assembly (4). When the syringe (2) is located at the second preset position, the syringe (2) is fixedly arranged, the pushing member (32) is separated from the column (31), and the column (31) continues to move under the action of the driving assembly (4) to push out the medicine in the syringe (2).

3. The automatic injection pen according to claim 2, characterized in that: The driving assembly (4) comprises a locking member (41) and an elastic member (42), wherein the locking member (41) is connected to the housing (1), and in the first direction (X), the locking member (41) is detachably connected to an end of the column (31) away from the syringe (2), and the elastic member (42) is arranged in the housing (1), and the elastic member (42) connects the housing (1) and the column (31), and the elastic member (42) is used to drive the column (31) to move along the first direction (X) after the locking member (41) is separated from the column (31).

4. The automatic injection pen according to claim 3, characterized in that: The first sound-generating component (5) has a guide slope (501), and a side of the first sound-generating component (5) facing away from the column (31) and a side of the first sound-generating component (5) facing the syringe (2) are connected via the guide slope (501), and the guide slope (501) extends obliquely from the outside to the inside along the first direction (X), and an avoidance space (100) is formed between a side of the first sound-generating component (5) facing away from the column (31) and an inner wall surface of the housing (1); The second sound-generating component (6) comprises a connecting column (61) and a buckle body (62), wherein the length direction of the connecting column (61) is the same as the first direction (X), and one end of the connecting column (61) along the first direction (X) is connected to a surface of the pushing member (32) facing away from the syringe (2), and the other end is connected to the buckle body (62); In which, in the first direction (X), the buckle body (62) is at least partially opposite to the guide slope (501), and in the radial direction of the column (31), there is a preset distance between the side of the connecting column (61) facing away from the column (31) and the inner wall surface of the shell (1), and the connecting column (61) can be deformed toward the side where the inner wall surface of the shell (1) is located under the action of the first sound-emitting component (5), and the avoidance space (100) is used for the connecting column (61) to pass through.

5. The automatic injection pen according to claim 4, characterized in that: In the first direction (X), the elastic member (42) is arranged on a side of the first sound-emitting component (5) away from the second sound-emitting component (6); one end of the elastic member (42) along the first direction (X) is connected to the column (31) through the first sound-emitting component (5), and the other end is connected to the housing (1).

6. The automatic injection pen according to claim 5, characterized in that: The elastic member (42) is a spring, and the elastic member (42) is sleeved on the outer circumference of the column (31); The first sound-generating component (5) is annular and is arranged around the axis of the column (31); In the radial direction of the column (31), the connecting column (61) is arranged on an end of the pushing member (32) away from the column (31).

7. The automatic injection pen according to claim 6, characterized in that: The first sound-emitting component (5) has a plurality of limiting portions (51), and the plurality of limiting portions (51) are arranged at intervals on the outer wall surface of the first sound-emitting component (5) around the axis of the column (31), and one end of the limiting portion (51) away from the center of the first sound-emitting component (5) contacts the inner wall surface of the shell (1), and the outer wall surface of the first sound-emitting component (5), the inner wall surface of the shell (1), and the avoidance space (100) is formed between the outer wall surface of the first sound-emitting component (5), the inner wall surface of the shell (1), and two adjacent limiting portions (51).

8. The automatic injection pen according to claim 6, characterized in that: The pushing member (32) is annular and has a connecting portion (321). The connecting portion (321) is located on the inner hole wall of the pushing member (32). The pushing member (32) is sleeved on the outer periphery of the column (31). The connecting portion (321) is detachably connected to the column (31).

9. The automatic injection pen according to claim 4, characterized in that: The plunger (3) further comprises a limit block (33), wherein the limit block (33) is connected to the column (31), and the limit block (33) is located at an end of the column (31) away from the syringe (2) in the first direction (X); In the first direction (X), the elastic member (42) is arranged on a side of the limit block (33) away from the syringe (2), and one end of the elastic member (42) along the first direction (X) is connected to the column (31) through the limit block (33), and the other end is connected to the shell (1).

10. The automatic injection pen according to claim 9, characterized in that: The elastic member (42) is a spring, and the elastic member (42) is sleeved on the outer circumference of the column (31); There are a plurality of the limit blocks (33), and the plurality of limit blocks (33) are arranged at intervals around the column (31), and an accommodating space (200) is formed between two adjacent limit blocks (33); The number of the first sound-generating components (5) is at least two, and all of the first sound-generating components (5) are arranged at intervals around the column (31) and are evenly arranged in different accommodating spaces (200); The outer wall surface of the column (31) is provided with a clamping groove (3101); The pushing member (32) is annular and is sleeved on the outer circumference of the column (31); The number of the second sound-emitting components (6) is at least two, and all the second sound-emitting components (6) are arranged at intervals around the center of the pushing member (32), and one second sound-emitting component (6) is arranged corresponding to one first sound-emitting component (5). In the second sound-emitting component (6), the connecting column (61) is arranged on the inner edge of the pushing member (32), the buckle body (62) is detachably engaged with the engaging groove (3101), and the pushing member (32) is detachably connected to the column (31) through the second sound-emitting component (6).

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