Simulation injection pen

Abstract

The embodiment of the present application provides a simulation injection pen, which is used to reduce the cost of users practicing or teaching the use of automatic injection pens. The embodiment of the present application includes: a pen body, a reset structure, a resettable unlocking structure, a resettable triggering structure, and a resettable propulsion structure; the triggering structure moves relative to the pen body and changes from an untriggered state to a triggered state; the triggering structure changes to a triggered state, so that the unlocking structure changes from an ununlocked state to an unlocked state; the unlocking structure changes to an unlocked state, so that the propulsion structure changes from a propulsion accumulation state to a propulsion end state; the reset structure cooperates with the propulsion structure, and the reset structure is used to reset the propulsion structure from the propulsion end state to the propulsion accumulation state; the reset structure cooperates with the unlocking structure, and the reset structure is used to reset the unlocking structure from an unlocked state to an ununlocked state.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical devices, and specifically to a simulation injection pen. Background Art

[0002] Currently, various autoinjector pens are available on the market to meet users' needs for self-administered medication injections, improving the convenience and timeliness of drug injections. However, since autoinjector pens are specialized medical devices, their use is often unfamiliar to the average user. Therefore, familiarity with their use requires practice and instruction.

[0003] Due to hygiene requirements, the needles and drugs of automatic injection pens are disposable items. If automatic injection pens are used for practice and teaching, it will cause huge waste. Summary of the Invention

[0004] The embodiments of the present application provide a simulation injection pen for reducing the cost of users practicing or teaching how to use an automatic injection pen.

[0005] The embodiment of the present application provides a simulation injection pen, comprising: a pen body, a reset structure, a resettable unlocking structure, a resettable trigger structure, and a resettable propulsion structure;

[0006] The unlocking structure and the propulsion structure are installed inside the pen body, and the triggering structure is partially set outside the pen body;

[0007] The push structure includes two states, namely the push-up state and the push-end state; the trigger structure includes two states, namely the untriggered state and the triggered state; the unlock structure includes two states, namely the unlocked state and the unlocked state;

[0008] The trigger structure moves relative to the pen body, changing from an untriggered state to a triggered state; the trigger structure changes to the triggered state, causing the unlocking structure to change from an ununlocked state to an unlocked state; the unlocking structure changes to the unlocked state, causing the propulsion structure to change from a propulsion accumulation state to a propulsion completion state;

[0009] The reset structure cooperates with the propulsion structure, and the reset structure is used to reset the propulsion structure from the propulsion end state to the propulsion accumulation state; the reset structure cooperates with the unlocking structure, and the reset structure is used to reset the unlocking structure from the unlocked state to the unlocked state.

[0010] It can be seen from the above technical solution that the embodiments of the present application have the following advantages: using a simulated injection pen with a resettable unlocking structure, a resettable trigger structure, and a resettable propulsion structure, and using a reset structure to reset each resettable structure, thereby achieving reusable use of the simulated injection pen, and being able to use one simulated injection pen for multiple practices and teaching, which significantly reduces costs compared to using an automatic injection pen for practice and teaching.

[0011] In one implementation of the present application, the simulation injection pen further includes a resettable push-end sounding structure;

[0012] The propulsion end sounding structure is installed inside the pen body;

[0013] The advancing and ending phonation structure includes two states: the phonation accumulation state and the phonation ending state;

[0014] The propulsion structure changes to the propulsion end state, so that the propulsion end phonation structure changes from the phonation accumulation state to the phonation end state;

[0015] The reset structure cooperates with the propulsion end sounding structure, and the reset structure is used to reset the propulsion end sounding structure from the sounding end state to the sounding accumulation state.

[0016] In this embodiment, a resettable propulsion completion sounding structure is used to emit a sound when the propulsion process ends to remind the user that the propulsion process is finished, thereby improving the feasibility of this solution.

[0017] In one implementation of the real-time example of the present application, the propulsion end sound-emitting structure realizes sound through catapult collision; the propulsion end sound-emitting structure includes a second elastic element, a second sound piece and a second blocking part; one end of the second elastic element is fixed relative to the second blocking part, and the other end of the second elastic element acts on the second sound piece; when the propulsion structure is transformed into the propulsion end state, the second sound piece moves relative to the second blocking part under the action of the second elastic element, and the second sound piece collides with the second blocking part to produce a sound.

[0018] In this embodiment, the propulsion end sounding structure realizes sounding through ejection collision, which improves the feasibility of the solution.

[0019] In one implementation of the present application, the propulsion end sound emitting structure further includes a housing elastic element, a housing track and a fixed window track; the second blocking member includes a sound member housing and a fixed window;

[0020] The second acoustic member moves within the acoustic member housing. The housing track is fixedly disposed on the acoustic member housing. The housing track is L-shaped and includes a fourth sub-track and a fifth sub-track. The second acoustic member is provided with a fourth track mating member. The fourth track mating member cooperates with the housing track so that when the fourth track mating member is located in the fifth sub-track, the second acoustic member can rotate relative to the acoustic member housing but cannot move forward or backward. When the fourth track mating member is located in the fourth sub-track, the second acoustic member can move backward relative to the acoustic member housing but cannot rotate.

[0021] The front end of the second elastic element acts on the second sound component, and the rear end of the second elastic element acts on the sound component housing;

[0022] The acoustic housing moves forward relative to the fixed window under the action of the housing elastic element, one end of the housing elastic element is fixed relative to the fixed window, and the other end of the housing elastic element is used to push the acoustic housing;

[0023] The fixed window track is fixedly arranged on the fixed window, and the fourth track matching member matches the fixed window track. The fixed window track includes a first sub-track, a second sub-track and a third sub-track, wherein the first sub-track and the third sub-track are parallel to each other, the first sub-track, the second sub-track and the third sub-track are connected, the rear end of the second sub-track is connected to the front end of the third sub-track, and the front end of the second sub-track is connected to the rear end of the first sub-track, so that the second sound member moves back and forth relative to the fixed window on the first sub-track and the third sub-track, and the second sound member rotates while the second sub-track moves back and forth relative to the fixed window;

[0024] The outer shell track and the fixed window track cooperate so that the fourth track cooperation piece is on the fourth sub-track at the same time as the first sub-track, the fourth track cooperation piece is on the fifth sub-track at the same time as the third sub-track, and rotates on the fifth sub-track while the second sub-track moves.

[0025] In this embodiment, the movement of the second sound component is controlled by providing a housing track and a fixed window track, thereby improving the feasibility of the solution.

[0026] In one implementation of the present application, the propulsion structure includes a piston cylinder, a piston rod, and a propulsion elastic element; the propulsion structure is a piston-type structure; the piston rod and the piston cylinder are capable of relative movement;

[0027] The piston rod is fixed relative to the pen body, and the piston cylinder is the movable part of the propulsion structure, or

[0028] The piston cylinder is fixed relative to the pen body, and the piston rod is the movable part of the propulsion structure;

[0029] One end of the propulsion elastic element is fixed relative to the pen body, and the other end of the propulsion elastic element acts on the propulsion structure movable part.

[0030] In this embodiment, the propulsion structure is divided into fixedly installed components and movable propulsion structure parts, and adopts a piston-type structure, which improves the feasibility of the solution.

[0031] In one implementation of the present application, the propulsion structure further includes a piston head, which is disposed at the end of the piston rod and cooperates with the piston cylinder.

[0032] In this embodiment, a piston head is provided at the end of the piston rod. The piston head cooperates with the piston cylinder. The time of the propulsion process can be adjusted by adjusting the size and material of the piston head, thereby improving flexibility.

[0033] In one implementation of the present application, the unlocking structure includes unlocking the linear motion part, unlocking the rotational motion part, and unlocking the fixed part;

[0034] When the unlocking structure is in an unlocked state, the unlocking linear motion part and the unlocking rotary motion part are in static cooperation;

[0035] When the unlocking structure changes from the unlocked state to the unlocked state, the unlocking rotary moving member cooperates with the unlocking fixed member under the push of the trigger structure, and the unlocking rotary moving member moves backward relative to the unlocking fixed member while rotating in the second direction; the unlocking linear moving member moves backward relative to the unlocking fixed member under the push of the unlocking rotary moving member until the unlocking linear moving member disengages from the unlocking rotary moving member;

[0036] When the unlocking structure is reset from the unlocked state to the unlocked state, the unlocking linear motion part cooperates with the unlocking rotary motion part under the push of the reset structure, the unlocking linear motion part moves backward relative to the unlocking fixed part, and the unlocking rotary motion part rotates in the second direction relative to the unlocking fixed part until the unlocking linear motion part and the unlocking rotary motion part are stationary.

[0037] In this embodiment, the unlocking structure is composed of an unlocking linear motion member, an unlocking rotational motion member, and an unlocking fixed member, which improves the feasibility of this solution.

[0038] In one implementation of the present application, the unlocking structure further includes: a first track, a second track, an unlocking positioning portion, a third track, a first elastic element, and a first rotating elastic element;

[0039] The third track is fixedly arranged on the unlocking fixing member, one end of the first elastic element is fixed relative to the pen body, and the other end of the first elastic element acts on the unlocking linear motion member;

[0040] A first track matching member is provided inside the unlocking linear motion member, and the first track matching member cooperates with the first track, so that the unlocking linear motion member can move forward and backward relative to the unlocking fixed member but cannot rotate relative to the unlocking fixed member;

[0041] The second track fixing and unlocking positioning portion is arranged on the inner side of the unlocking rotary moving member, and the unlocking positioning portion is connected to the second track; a second track matching member is arranged on the outer side of the unlocking linear moving member, and the second track matching member matches the second track, so that when the second track matching member moves backward along the second track, the unlocking rotary moving member rotates in the second direction relative to the unlocking linear moving member;

[0042] One end of the first rotating elastic element is connected to the trigger structure, and the other end of the first rotating elastic element is connected to the unlocking rotating moving member; the unlocking positioning portion is fixedly arranged on the inner side of the unlocking rotating moving member, and the unlocking positioning portion is connected to the second track, so that when the second track matching member moves backward along the second track until it is separated from the second track, the unlocking rotating moving member rotates in the first direction under the action of the first rotating elastic element, so that the second track matching member is matched with the unlocking positioning portion;

[0043] A third track fitting part is provided outside the unlocking rotary moving part, and the third track fitting part cooperates with the third track, so that when the third track fitting part moves backward along the third track, the unlocking rotary moving part rotates in the second direction relative to the pen body.

[0044] In this embodiment, the unlocking structure is provided with a plurality of tracks for controlling the movement modes of the unlocking linear motion part and the unlocking rotational motion part, thereby improving the feasibility of the solution.

[0045] In one implementation of the present application, the trigger structure includes a needle guard and a skin elastic element;

[0046] The needle guard is arranged at the front end of the pen body and can move back and forth relative to the pen body; one end of the skin elastic element is fixed relative to the pen body, and the other end of the skin elastic element acts on the needle guard; the rear end of the needle guard is connected to one end of the first rotating elastic element, and the rear end of the needle guard is against the front end of the unlocking rotating moving part.

[0047] In this embodiment, the needle guard and the skin elastic element are used to form a trigger structure, which improves the feasibility of this solution.

[0048] In one implementation of the present application, the reset structure includes a reset needle; the reset needle is used to be pushed in from the front end of the pen body.

[0049] In this embodiment, a reset pin is used as the reset structure, which has a simple structure and is easy to use.

[0050] In one implementation of the present application, the simulation injection pen further includes a cap;

[0051] The cap is detachably connected to the front end of the pen body;

[0052] The reset structure is arranged at the rear end of the pen cap.

[0053] In this embodiment, the reset structure is connected to the cap, so that the steps of closing the cap and resetting the cap are combined into one step, which is more convenient to use.

[0054] In one implementation of the present application, the pen body is provided with a window, which is transparent or hollow, so that the user can observe the propulsion structure through the window.

[0055] In this embodiment, a viewing window is provided on the pen body to facilitate the user to observe the movement of the propulsion structure through the eyes.

[0056] In one implementation of the present application, the simulation injection pen further includes a resettable stop structure;

[0057] The anti-retraction structure is installed inside the pen body;

[0058] The anti-retraction structure includes two states, namely, the anti-retraction active state and the anti-retraction locked state;

[0059] The trigger structure moves relative to the pen body, from the triggered state back to the untriggered state, causing the backstop structure to transition from the backstop active state to the backstop locked state; the backstop structure in the backstop locked state locks the trigger structure in the untriggered state, preventing the trigger structure from transitioning from the untriggered state to the triggered state;

[0060] The reset structure cooperates with the anti-retraction structure, and the anti-retraction structure is used to reset the anti-retraction structure from the anti-retraction locking state to the anti-retraction active state.

[0061] In this embodiment, a resettable stop structure is used to prevent the trigger structure from being triggered again before resetting after completing an exercise, thereby improving the feasibility of this solution.

[0062] In one implementation of the present application, the anti-retraction structure includes a rotation locking component, a second rotation elastic element and an anti-retraction blocking component;

[0063] The anti-retraction blocking component is fixedly mounted on the pen body, one end of the second rotation elastic element is connected to the trigger structure, and the other end of the second rotation elastic element is connected to the rotation locking component. The rotation locking component can rotate relative to the trigger structure, but cannot move forward and backward relative to the trigger structure. A anti-retraction protrusion is provided on the outer side of the rotation locking component, and the anti-retraction blocking component is provided with a anti-retraction track.

[0064] When the anti-retraction structure is in the anti-retraction active state, the anti-retraction protrusion cooperates with the anti-retraction track, so that the rotation locking component moves backward relative to the anti-retraction blocking component under the push of the trigger structure;

[0065] When the trigger structure returns to the untriggered state from the triggered state, the trigger structure drives the rotation locking component to move forward until the stop protrusion is disengaged from the front end of the stop track. After the stop protrusion is disengaged from the stop track, the rotation locking component rotates in the second direction under the action of the second rotation elastic element, so that the rear end of the stop protrusion abuts against the front end of the stop blocking component, thereby preventing the rotation locking component from moving backward.

[0066] When the anti-retreat structure is in the anti-retreat locking state, the rotation locking component cannot move backward relative to the anti-retreat blocking component at the locked position.

[0067] In this embodiment, the anti-retraction structure is formed by using the rotation locking component, the second rotation elastic element and the anti-retraction blocking component, which improves the feasibility of this solution.

[0068] In one implementation of the present application, the simulation injection pen further includes a resettable propulsion-starting sounding structure;

[0069] The propulsion and starting sound generating structure is installed inside the pen body;

[0070] The structure of the propulsion initial phonation includes two states, namely the phonation accumulation state and the phonation end state;

[0071] The unlocking structure changes to the unlocked state, causing the propulsion start sounding structure to change from the sounding accumulation state to the sounding end state; the propulsion start sounding structure changes to the sounding end state, causing the propulsion structure to change from the propulsion accumulation state to the propulsion end state;

[0072] The reset structure cooperates with the propulsion start sounding structure, and the reset structure is used to reset the propulsion start sounding structure from the sound ending state to the sound accumulation state.

[0073] In this embodiment, a resettable propulsion start sounding structure is used to emit a sound when the propulsion process begins to remind the user that the propulsion process has begun, thereby improving the feasibility of this solution.

[0074] In one implementation of the real-time example of the present application, the propulsion starting sound-generating structure realizes sound through catapult collision; the propulsion starting sound-generating structure includes a starting elastic element, a first sound component and a first blocking component; one end of the starting elastic element is fixed relative to the pen body, and the other end of the starting elastic element acts on the first sound component; when the unlocking structure is changed to the unlocked state, the first sound component moves relative to the first blocking component under the action of the starting elastic element, and the first sound component collides with the first blocking component to produce a sound.

[0075] In this embodiment, the propulsion-starting sound-generating structure generates sound through ejection collision, thereby improving the feasibility of this solution.

[0076] In one implementation of the present application, the propulsion structure includes a piston cylinder, a piston rod, and a propulsion elastic element; the propulsion structure is a piston-type structure; the piston rod and the piston cylinder are capable of relative movement;

[0077] The piston rod is fixed relative to the pen body, and the piston cylinder is the movable part of the propulsion structure, or

[0078] The piston cylinder is fixed relative to the pen body, and the piston rod is the movable part of the propulsion structure;

[0079] One end of the propulsion elastic element is fixed relative to the pen body, and the other end of the propulsion elastic element acts on the propulsion structure movable part;

[0080] The first blocking component is fixedly connected to the movable part of the propulsion structure.

[0081] In this embodiment, the first blocking component is fixedly connected to the movable part of the propulsion structure, which improves the feasibility of this solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 is a front view of the simulated injection pen of an embodiment of the present application before use;

[0083] Figure 2 is a cross-sectional view of the simulated injection pen of an embodiment of the present application before use;

[0084] Figure 3 is a three-dimensional diagram of the simulated injection pen in use according to an embodiment of the present application;

[0085] Figure 4 is a cross-sectional view of the simulated injection pen in use according to an embodiment of the present application;

[0086] Figure 5 is a cross-sectional view of the unlocked state of the simulated injection pen according to an embodiment of the present application;

[0087] Figure 6 is a cross-sectional view of the first sound component of the simulated injection pen according to an embodiment of the present application in a collision and sounding state;

[0088] Figure 7 is a cross-sectional view of the second sound component of the simulated injection pen according to an embodiment of the present application in a collision and sounding state;

[0089] Figure 8 is a cross-sectional view of the simulated injection pen in a locked state according to an embodiment of the present application;

[0090] Figure 9 This is an exploded view of the simulated injection pen according to an embodiment of the present application;

[0091] Figure 10 is another exploded view of the simulated injection pen according to an embodiment of the present application;

[0092] Figure 11 is a three-dimensional diagram of an unlocking linear motion component of a simulation injection pen according to an embodiment of the present application;

[0093] Figure 12 is a three-dimensional diagram of an unlocking rotary moving part of a simulation injection pen according to an embodiment of the present application;

[0094] Figure 13 is a cross-sectional view of an unlocking rotary moving part of the simulation injection pen according to an embodiment of the present application;

[0095] Figure 14 This is a front view of the unlocking fixture of the simulation injection pen according to an embodiment of the present application;

[0096] Figure 15 is a three-dimensional diagram of the piston cylinder of the simulated injection pen according to an embodiment of the present application;

[0097] Figure 16 is a three-dimensional diagram of the second sound component and the sound component housing of the simulation injection pen according to an embodiment of the present application in a sound-generating and ready-to-sound state;

[0098] Figure 17 is a three-dimensional diagram of the second sound component and the sound component housing of the simulation injection pen according to an embodiment of the present application in a state where sound production has ended;

[0099] Figure 18 is a three-dimensional diagram of a fixed window of a simulated injection pen according to an embodiment of the present application;

[0100] Figure 19 This is a front view of the fixed window of the simulated injection pen according to an embodiment of the present application;

[0101] 1. Pen body; 101. Window; 2. Reset needle; 301. Unlocking linear motion member; 3011. First track matching member; 3012. Second track matching member; 302. Unlocking rotational motion member; 3021. Third track matching member; 303. Unlocking fixing member; 304. First track; 305. Second track; 306. Third track; 307. First elastic element; 308. First rotational elastic element; 309. Unlocking positioning part; 401. Needle guard head; 402. Needle guard connector; 403. Skin elastic element; 501. Piston cylinder; 502. Piston rod; 503. Piston head; 504. Window; 505. Propelling elastic element; 601. Second sound member; 6011. Fourth track Mating part; 602, sound component housing; 6021, first half shell; 6022, second half shell; 6023, sound component housing sleeve; 603, fixed window; 604, second elastic element; 605, housing elastic element; 606, housing track; 6061, fourth sub-track; 6062, fifth sub-track; 607, fixed window track; 6071, first sub-track; 6072, second sub-track; 6073, third sub-track; 701, rotation locking component; 7011, stop protrusion; 702, stop blocking component; 703, second rotation elastic element; 801, first sound component; 802, first blocking component; 803, starting elastic element; 9, pen body rear cover; 10, cap; 11, pen body front frame. DETAILED DESCRIPTION

[0102] The terms "first," "second," "third," "fourth," and the like in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0103] A simulated injection pen, also known as an injection practice pen, is used to simulate an automatic injection pen. The simulated injection pen can be used to cultivate the user's usage habits or for teaching, so the operating procedures of the simulated injection pen should be consistent with the operating procedures of the automatic injection pen, but the simulated injection pen does not perform injection work, so it does not carry a needle and a medicine bottle. The general process of an automatic injection pen includes triggering, unlocking, a voice prompt at the start of advancement, advancement, a window 101 prompt, a voice prompt at the end of advancement, and a syringe protection stop. All or part of the process of the automatic injection pen needs to be reproduced in the simulated injection pen, and different processes are executed by different structures. In order to simplify the structure, structures that execute different processes often need to share some parts. Since it is a simulated injection pen, in order to save costs, the simulated injection pen needs to be designed to be resettable for recycling.

[0104] For the convenience of description, the direction from the back cover of the pen cap to the needle guard cylinder head 401 is defined as the front, and the direction from the needle guard cylinder head 401 to the back cover of the pen cap is defined as the rear.

[0105] like Figures 1 to 10 As shown, the simulation injection pen of the embodiment of the present application includes a pen body 1, a reset structure, a resettable unlocking structure, a resettable trigger structure, and a resettable propulsion structure;

[0106] The unlocking structure and the propulsion structure are installed inside the pen body 1, and the triggering structure is partially set outside the pen body 1;

[0107] The push structure includes two states, namely the push-up state and the push-end state; the trigger structure includes two states, namely the untriggered state and the triggered state; the unlock structure includes two states, namely the unlocked state and the unlocked state;

[0108] The trigger structure moves relative to the pen body 1, changing from an untriggered state to a triggered state; the trigger structure changes to the triggered state, causing the unlocking structure to change from an unlocked state to an unlocked state; the unlocking structure changes to the unlocked state, causing the propulsion structure to change from a propulsion accumulation state to a propulsion completion state;

[0109] The reset structure cooperates with the propulsion structure, and the reset structure is used to reset the propulsion structure from the propulsion end state to the propulsion accumulation state; the reset structure cooperates with the unlocking structure, and the reset structure is used to reset the unlocking structure from the unlocked state to the unlocked state.

[0110] The embodiments of the present application have the following advantages: a simulated injection pen with a resettable unlocking structure, a resettable trigger structure, and a resettable propulsion structure is used, and each resettable structure is reset using a reset structure, thereby achieving reusability of the simulated injection pen, and being able to use one simulated injection pen for multiple practice and teaching, which significantly reduces costs compared to using an automatic injection pen for practice and teaching.

[0111] like Figures 1 to 10 As shown, the simulation injection pen of the embodiment of the present application includes a pen body 1, a reset structure, a resettable unlocking structure, a resettable trigger structure, and a resettable propulsion structure;

[0112] The unlocking structure and the propulsion structure are installed inside the pen body 1, and the triggering structure is partially set outside the pen body 1;

[0113] The push structure includes two states, namely the push-up state and the push-end state; the trigger structure includes two states, namely the untriggered state and the triggered state; the unlock structure includes two states, namely the unlocked state and the unlocked state;

[0114] The trigger structure moves relative to the pen body 1, changing from an untriggered state to a triggered state; the trigger structure changes to the triggered state, causing the unlocking structure to change from an unlocked state to an unlocked state; the unlocking structure changes to the unlocked state, causing the propulsion structure to change from a propulsion accumulation state to a propulsion completion state;

[0115] The reset structure cooperates with the propulsion structure, and the reset structure is used to reset the propulsion structure from the propulsion end state to the propulsion accumulation state; the reset structure cooperates with the unlocking structure, and the reset structure is used to reset the unlocking structure from the unlocked state to the unlocked state.

[0116] The simulation injection pen also includes a resettable push-end sounding structure;

[0117] The push-end sounding structure is installed inside the pen body 1;

[0118] The advancing and ending phonation structure includes two states: the phonation accumulation state and the phonation ending state;

[0119] The propulsion structure changes to the propulsion end state, so that the propulsion end phonation structure changes from the phonation accumulation state to the phonation end state;

[0120] The reset structure cooperates with the propulsion end sounding structure, and the reset structure is used to reset the propulsion end sounding structure from the sounding end state to the sounding accumulation state.

[0121] The simulation injection pen also includes a resettable anti-retraction structure;

[0122] The anti-retraction structure is installed inside the pen body 1;

[0123] The anti-retraction structure includes two states, namely, the anti-retraction active state and the anti-retraction locked state;

[0124] The trigger structure moves relative to the pen body 1, from the triggered state back to the untriggered state, causing the backstop structure to transition from the backstop active state to the backstop locked state; the backstop structure in the backstop locked state locks the trigger structure in the untriggered state, preventing the trigger structure from transitioning from the untriggered state to the triggered state;

[0125] The reset structure cooperates with the anti-retraction structure, and the anti-retraction structure is used to reset the anti-retraction structure from the anti-retraction locking state to the anti-retraction active state.

[0126] The simulation injection pen also includes a resettable propulsion-starting sounding structure;

[0127] The propulsion initial sound generating structure is installed inside the pen body 1;

[0128] The structure of the propulsion initial phonation includes two states, namely the phonation accumulation state and the phonation end state;

[0129] The unlocking structure changes to the unlocked state, causing the propulsion start sounding structure to change from the sounding accumulation state to the sounding end state; the propulsion start sounding structure changes to the sounding end state, causing the propulsion structure to change from the propulsion accumulation state to the propulsion end state;

[0130] The reset structure cooperates with the propulsion start sounding structure, and the reset structure is used to reset the propulsion start sounding structure from the sound ending state to the sound accumulation state.

[0131] It should be noted that the resettable propulsion end sounding structure, the resettable retreat stop structure and the resettable propulsion start sounding structure are optional structures.

[0132] The simulation injection pen of the embodiment of the present application can be divided into a pen body 1, a reset structure, a resettable unlocking structure, a resettable trigger structure, a resettable propulsion structure, a resettable propulsion end sounding structure, a resettable stop structure and a resettable propulsion start sounding structure, which are explained below respectively.

[0133] like Figures 1 to 2 As shown, the simulation injection pen is provided with a pen body 1. The pen body 1 is a tubular structure with a through hole inside, and can be a cylinder or a prism. The front end of the pen body 1 is provided with a protrusion or a buckle for connecting to the pen body front frame 11, and the rear end of the pen body 1 is provided with a protrusion or a buckle for connecting to the pen body rear cover 9. A window 101 can be provided on the side of the pen body 1. The window 101 is transparent or hollow so that the user can observe the propulsion structure through the window 101; alternatively, the pen body 1 is transparent so that the user can observe the propulsion structure through the pen body 1. The fixed window 603 can also be transparent to facilitate the user to observe the movement of the sound component housing 602.

[0134] like Figures 3 and 4As shown, the simulated injection pen is provided with a reset structure. The reset structure can be a reset needle 2 or a reset button. The reset needle 2 is used as an example for description below. The reset needle 2 is cylindrical or prismatic and is used to be inserted from the front end of the pen body 1 and push the various structures to reset.

[0135] The reset structure works in conjunction with the propulsion structure, resetting the propulsion structure from the end-of-propulsion state to the pre-propelled state. It also works in conjunction with the unlocking structure, resetting the unlocking structure from the unlocked state to the unlocked state. The reset structure works in conjunction with the propulsion end sounding structure, resetting the propulsion end sounding structure from the end-of-sounding state to the pre-sounding state. The reset structure works in conjunction with the stop-retraction structure, resetting the stop-retraction structure from the stop-retraction locked state to the stop-retraction active state. The reset structure works in conjunction with the propulsion start sounding structure, resetting the propulsion start sounding structure from the end-of-sounding state to the pre-sounding state.

[0136] The reset pin 2 can be installed in the cap 10, simplifying the use process and combining the reset step and the step of putting on the cap 10 into one step. A reset pin 2 seat is provided at the rear end of the cap 10, and one end of the reset pin 2 is inserted into the reset pin 2 seat to complete the installation of the reset pin 2.

[0137] like Figures 1 to 15 As shown, the simulation injection pen is provided with a resettable unlocking structure.

[0138] The unlocking structure includes an unlocking linear motion part 301, an unlocking rotational motion part 302, and an unlocking fixed part 303;

[0139] When the unlocking structure is in an unlocked state, the unlocking linear motion member 301 and the unlocking rotary motion member 302 are in static cooperation;

[0140] When the unlocking structure changes from the unlocked state to the unlocked state, the unlocking rotary moving member 302 cooperates with the unlocking fixed member 303 under the push of the trigger structure, and the unlocking rotary moving member 302 moves backward relative to the unlocking fixed member 303 while rotating in the second direction; the unlocking linear moving member 301 moves backward relative to the unlocking fixed member 303 under the push of the unlocking rotary moving member 302 until the unlocking linear moving member 301 disengages from the unlocking rotary moving member 302;

[0141] When the unlocking structure is reset from the unlocked state to the unlocked state, the unlocking linear motion member 301 cooperates with the unlocking rotary motion member 302 under the push of the reset structure, the unlocking linear motion member 301 moves backward relative to the unlocking fixed member 303, and the unlocking rotary motion member 302 rotates in the second direction relative to the unlocking fixed member 303 until the unlocking linear motion member 301 and the unlocking rotary motion member 302 are stationary.

[0142] The unlocking structure further includes: a first track 304 , a second track 305 , an unlocking positioning portion 309 , a third track 306 , a first elastic element 307 , and a first rotational elastic element 308 .

[0143] The third track 306 is fixedly mounted on the unlocking fixing member 303. One end of the first elastic member 307 is fixed relative to the pen body 1, and the other end of the first elastic member 307 acts on the unlocking linear motion member 301.

[0144] A first track 304 matching piece 3011 is provided inside the unlocking linear motion piece 301. The first track 304 matching piece 3011 cooperates with the first track 304, so that the unlocking linear motion piece 301 can move forward and backward relative to the unlocking fixed piece 303 but cannot rotate relative to the unlocking fixed piece 303.

[0145] The second track 305 fixing and unlocking positioning portion 309 is provided on the inner side of the unlocking rotary motion member 302, and the unlocking positioning portion 309 is connected to the second track 305; the second track 305 matching member 3012 is provided on the outer side of the unlocking linear motion member 301, and the second track 305 matching member 3012 matches the second track 305, so that when the second track 305 matching member 3012 moves backward along the second track 305, the unlocking rotary motion member 302 rotates in the second direction relative to the unlocking linear motion member 301;

[0146] One end of the first rotating elastic element 308 is connected to the trigger structure, and the other end of the first rotating elastic element 308 is connected to the unlocking rotating member 302; the unlocking positioning portion 309 is fixedly disposed inside the unlocking rotating member 302, and the unlocking positioning portion 309 is connected to the second track 305, so that when the matching member 3012 of the second track 305 moves backward along the second track 305 until it is separated from the second track 305, the unlocking rotating member 302 rotates in the first direction under the action of the first rotating elastic element 308, so that the matching member 3012 of the second track 305 is engaged with the unlocking positioning portion 309;

[0147] A third track 306 matching piece 3021 is provided outside the unlocking rotational moving piece 302. The third track 306 matching piece 3021 matches with the third track 306 so that when the third track 306 matching piece 3021 moves backward along the third track 306, the unlocking rotational moving piece 302 rotates in the second direction relative to the pen body 1.

[0148] It should be noted that in this embodiment, the first direction is the counterclockwise direction when looking down, and the second direction is the clockwise direction when looking down; the first direction can also be determined as the clockwise direction when looking down, and the second direction can be determined as the counterclockwise direction when looking down.

[0149] When the first rotational elastic element 308 is a torsion spring, the unlocking rotational moving member 302 is provided with a protrusion or a groove for engaging with the first rotational elastic element 308; and the rear end of the needle guard cylinder connecting member 402 is provided with a protrusion or a groove for engaging with the first rotational elastic element 308. When the first rotational elastic element 308 is a torsion spring, the first rotational elastic element 308 can be disposed outside the unlocking rotational moving member 302 or outside the needle guard cylinder connecting member 402.

[0150] like Figures 2 to 10 As shown, the simulated injection pen is provided with a resettable trigger structure. The trigger structure can be installed at the front end, rear end, or side wall of the pen body 1. The following description will take the trigger structure installed at the front end of the pen body 1 as an example. The front end of the needle guard is exposed from the pen body 1, allowing the user to press the front end of the needle guard. The trigger structure includes a needle guard and a skin elastic element 403; the needle guard is arranged at the front end of the pen body 1 and can move back and forth relative to the pen body 1; one end of the skin elastic element 403 is fixed relative to the pen body 1, and the other end of the skin elastic element 403 acts on the needle guard; the rear end of the needle guard is connected to one end of the first rotating elastic element 308, and the rear end of the needle guard abuts the front end of the unlocking rotating moving part 302. The skin elastic element 403 is a spring.

[0151] The syringe guard includes a syringe head 401 and a syringe connector 402. The rear end of the syringe head 401 is fixedly mounted to the front end of the syringe connector 402. Separating the syringe head 401 and the connector 402 facilitates installation. One end of the skin elastic element 403 is fixed to the pen body 1, while the other end of the skin elastic element 403 acts on the syringe head 401. The rear end of the syringe connector 402 is connected to one end of the first rotating elastic element 308, and the rear end of the syringe connector 402 abuts against the front end of the unlocking rotating member 302.

[0152] It should be noted that for the trigger mechanism, the triggered state refers to the needle guard being in the rearmost position it can move relative to the pen body 1, and the untriggered state refers to the needle guard being in the forwardmost position it can move relative to the pen body 1. Under the action of the skin spring, the trigger mechanism can return from the triggered state to the untriggered state after the external pressure on the needle guard is released.

[0153] like Figures 2 to 10 and Figures 14 and 15 As shown, the simulated injection pen is equipped with a resettable propulsion mechanism. This propulsion mechanism simulates the injection time of a real injection pen, so the propulsion time of the propulsion mechanism is equal to the injection time of a real injection pen. To facilitate the user's observation of the start, progress, and end of the propulsion, visual cues such as windows and window plates can be provided, as well as auditory cues such as propulsion start and propulsion end sound structures.

[0154] The propulsion structure includes a piston cylinder 501, a piston rod 502 and a propulsion elastic element 505; the propulsion structure is a piston-type structure; the piston rod 502 and the piston cylinder 501 can move relative to each other; the piston rod 502 is fixedly installed relative to the pen body 1, and the piston cylinder 501 is the movable part of the propulsion structure, or the piston cylinder 501 is fixedly installed relative to the pen body 1, and the piston rod 502 is the movable part of the propulsion structure; one end of the propulsion elastic element 505 is fixed relative to the pen body 1, and the other end of the propulsion elastic element 505 acts on the movable part of the propulsion structure.

[0155] The propulsion structure also includes a piston head 503, which is disposed at the end of the piston rod 502 and engages with the piston cylinder 501. The propulsion time can be adjusted by adjusting the tightness of the fit between the piston head 503 and the piston cylinder 501. The piston head 503 is made of silicone or rubber.

[0156] It should be noted that the piston rod 502 is fixed relative to the pen body 1 and the piston cylinder 501 is the movable part of the propulsion structure, or the piston cylinder 501 is fixed relative to the pen body 1 and the piston rod 502 is the movable part of the propulsion structure. The propulsion structure can also be a tape measure structure.

[0157] like Figures 2 to 10 and Figures 16 to 19 As shown, the simulation injection pen is provided with a resettable sounding structure at the end of advancement. The sounding structure at the end of advancement is used to make a sound when advancement is completed to remind the user that advancement is completed.

[0158] The propulsion end sound-emitting structure realizes sound through catapult collision; the propulsion end sound-emitting structure includes a second elastic element 604, a second sound piece 601 and a second blocking component; one end of the second elastic element 604 is fixed relative to the second blocking component, and the other end of the second elastic element 604 acts on the second sound piece 601; when the propulsion structure is transformed into the propulsion end state, the second sound piece 601 moves relative to the second blocking component under the action of the second elastic element 604, and the second sound piece 601 collides with the second blocking component to produce a sound.

[0159] The propulsion end sounding structure further includes a housing elastic element 605, a housing track 606 and a fixed window track 607; the second blocking member includes a sound member housing 602 and a fixed window 603;

[0160] The second acoustic member 601 moves within the acoustic member housing 602. The housing track 606 is fixedly mounted on the acoustic member housing 602. The housing track 606 is L-shaped and includes a fourth sub-track 6061 and a fifth sub-track 6062. The second acoustic member 601 is provided with a fourth track fitting member 6011. The fourth track fitting member 6011 cooperates with the housing track 606 so that when the fourth track fitting member 6011 is located on the fifth sub-track 6062, the second acoustic member 601 can rotate relative to the acoustic member housing 602 but cannot move forward or backward. When the fourth track fitting member 6011 is located on the fourth sub-track 6061, the second acoustic member 601 can move backward relative to the acoustic member housing 602 but cannot rotate.

[0161] The front end of the second elastic element 604 acts on the second sound component 601 , and the rear end of the second elastic element 604 acts on the sound component housing 602 ;

[0162] The acoustic housing 602 moves forward relative to the fixed window 603 under the action of the housing elastic element 605. One end of the housing elastic element 605 is fixed relative to the fixed window 603, and the other end of the housing elastic element 605 is used to push the acoustic housing 602.

[0163] The fixed window track 607 is fixedly mounted on the fixed window 603. The fourth track matching member 6011 matches the fixed window track 607. The fixed window track 607 includes a first sub-track 6071, a second sub-track 6072, and a third sub-track 6073. The first sub-track 6071 and the third sub-track 6073 are parallel to each other and connected to each other. The rear end of the second sub-track 6072 is connected to the front end of the third sub-track 6073, and the front end of the second sub-track 6072 is connected to the rear end of the first sub-track 6071. This allows the second sound member 601 to move back and forth relative to the fixed window 603 on the first sub-track 6071 and the third sub-track 6073. The second sound member 601 rotates while the second sub-track 6072 moves back and forth relative to the fixed window 603.

[0164] The outer shell track 606 and the fixed window track 607 cooperate so that the fourth track fitting part 6011 is on the fourth sub-track 6061 at the same time as the first sub-track 6071, and the fourth track fitting part 6011 is on the fifth sub-track 6062 at the same time as the third sub-track 6073, and rotates in the fifth sub-track 6062 at the same time as the second sub-track 6072 moves.

[0165] The acoustic housing 602 includes a first half shell 6021, a second half shell 6022, and an acoustic housing sleeve 6023. The acoustic housing 602 can be divided into left and right halves, i.e., the first half shell 6021 and the second half shell 6022 are separated by a plane passing through the axis of the acoustic housing 602. The first half shell 6021 and the second half shell 6022 mate with each other, and the rear end of the acoustic housing 602 mates with the piston cylinder 501. To reinforce the acoustic housing 602, an acoustic housing sleeve 6023 can be provided at the front end of the acoustic housing 602. The acoustic housing 602 can also be divided into front and back halves, i.e., the first half shell 6021 and the second half shell 6022 are separated along a cross section. The first half shell 6021 and the second half shell 6022 can be connected by threads.

[0166] The second elastic element 604 is a tower-shaped elastic element. The propulsion elastic element 505, the housing elastic element 605 and the first elastic element 307 can be the same elastic element.

[0167] like Figures 2 to 10 Figures 12 to 14 As shown, the simulated injection pen is equipped with a resettable stop structure. The stop structure is used to prevent the trigger structure from being triggered a second time. Specifically, when the stop structure is in the stop active state, the trigger structure enters the triggered state from the untriggered state and then returns from the triggered state to the untriggered state. The stop structure then enters the stop locked state from the stop active state. When the stop structure is in the stop locked state, the trigger structure is locked in the untriggered state and cannot return from the untriggered state to the triggered state.

[0168] The anti-retraction structure includes a rotation locking component 701, a second rotation elastic element 703 and an anti-retraction blocking component 702;

[0169] The anti-retraction blocking component 702 is fixedly mounted on the pen body 1. One end of the second rotational elastic element 703 is connected to the trigger structure, and the other end of the second rotational elastic element 703 is connected to the rotational locking component 701. The rotational locking component 701 can rotate relative to the trigger structure, but cannot move forward or backward relative to the trigger structure. A anti-retraction protrusion 7011 is provided on the outer side of the rotational locking component 701, and the anti-retraction blocking component 702 is provided with a anti-retraction track.

[0170] When the anti-retraction structure is in the anti-retraction active state, the anti-retraction protrusion 7011 cooperates with the anti-retraction track, so that the rotation locking component 701 moves backward relative to the anti-retraction blocking component 702 under the push of the trigger structure;

[0171] When the trigger structure returns to the untriggered state from the triggered state, the trigger structure drives the rotation locking component 701 to move forward until the stop protrusion 7011 is disengaged from the front end of the stop track. After the stop protrusion 7011 is disengaged from the stop track, the rotation locking component 701 rotates in the second direction under the action of the second rotation elastic element 703, so that the rear end of the stop protrusion 7011 abuts against the front end of the stop blocking component 702, thereby preventing the rotation locking component 701 from moving backward.

[0172] When the anti-retreat structure is in the anti-retreat locking state, the rotation locking component 701 cannot move backward relative to the anti-retreat blocking component 702 in the locked position.

[0173] When the second rotational elastic element 703 is a torsion spring, the rotational locking component 701 is provided with a protrusion or a groove for engaging with the second rotational elastic element 703; and the rear end of the needle guard cylinder connecting piece 402 is provided with a protrusion or a groove for engaging with the second rotational elastic element 703. When the second rotational elastic element 703 is a torsion spring, the second rotational elastic element 703 can be disposed outside the rotational locking component 701 or outside the needle guard cylinder connecting piece 402.

[0174] like Figures 2 to 15 As shown, the simulation injection pen is provided with a resettable push-start sounding structure. The push-start sounding structure is used to prompt the start of push-up. The push-start sounding structure makes a sound when the push-up structure starts to push after the unlocking structure changes to the unlocked state.

[0175] The propulsion-starting sound-generating structure realizes sound through catapult collision; the propulsion-starting sound-generating structure includes a starting elastic element 803, a first sound component 801 and a first blocking component 802; one end of the starting elastic element 803 is fixed relative to the pen body 1, and the other end of the starting elastic element 803 acts on the first sound component 801; when the unlocking structure is transformed into the unlocked state, the first sound component 801 moves relative to the first blocking component 802 under the action of the starting elastic element 803, and the first sound component 801 collides with the first blocking component 802 to produce a sound.

[0176] The propulsion structure includes a piston cylinder 501, a piston rod 502 and a propulsion elastic element 505; the propulsion structure is a piston-type structure; the piston rod 502 and the piston cylinder 501 can move relative to each other;

[0177] The piston rod 502 is fixed relative to the pen body 1, and the piston cylinder 501 is a movable part of the propulsion structure, or,

[0178] The piston cylinder 501 is fixed relative to the pen body 1, and the piston rod 502 is a movable part of the propulsion structure;

[0179] One end of the propulsion elastic element 505 is fixed relative to the pen body 1, and the other end of the propulsion elastic element 505 acts on the movable part of the propulsion structure;

[0180] The first blocking component 802 is fixedly connected to the movable part of the propulsion structure.

[0181] It should be noted that the first elastic element 307, the propulsion elastic element 505, the skin elastic element 403, the second elastic element 604, the housing elastic element 605, and the starting elastic element 803 are springs or rubber bands, etc.; the first rotational elastic element 308 and the second rotational elastic element 703 are torsion springs or rubber bands, etc. The second elastic element 604 can be a conical spring.

[0182] The first track 304, the second track 305, the third track 306, the shell track 606, and the fixed window track 607 can be grooves or protrusions; the first track 304 matching piece 3011, the second track 305 matching piece 3012, the third track 306 matching piece 3021, and the fourth track matching piece 6011 can be protrusions or grooves.

[0183] The unlocking fixture 303 , the backstopping member 702 , the third track 306 , and the piston rod 502 may be designed as one component, namely a lock.

[0184] When the first elastic element 307 is a spring, a spring groove may be provided at the rear end of the unlocking linear motion member 301 .

[0185] In order to further illustrate the cooperation between different structures, the operation of the entire simulation injection pen is described below. The following is only an example. Figures 1 to 19 As shown, the simulation injection pen of the embodiment of the application includes a pen body 1, a reset structure, a resettable unlocking structure, a resettable trigger structure, a resettable propulsion structure, a resettable propulsion end sounding structure, a resettable stop structure and a resettable propulsion start sounding structure;

[0186] The structural changes of the virtual injection pen can be divided into use and reset. Use can be divided into the pre-use state, the in-use state, and the post-use state. Reset can be divided into the pre-reset state, the in-reset state, and the post-reset state. The pre-use state is the same as the post-reset state, and the post-use state is the same as the pre-reset state. The virtual injection pen can be recycled, resetting after use and then resetting again, alternating in a continuous cycle.

[0187] The structure and movement of the simulated injection pen in different states are described below.

[0188] 1. Status before use.

[0189] The reset needle 2 is installed on the reset needle 2 seat of the cap 10 , the cap 10 is installed at the front end of the pen body 1 , and the reset needle 2 is inserted into the pen body 1 .

[0190] The needle guard head 401 is located at the front end where the needle guard head 401 can move relative to the pen body 1 .

[0191] The fourth track engaging member 6011 of the second acoustic member 601 is located on the fifth sub-track 6062 of the outer track 606 of the acoustic member housing 602. The fourth track engaging member 6011 of the second acoustic member 601 is located on the third segment of the fixed window track 607 of the fixed window 603. The second acoustic member 601 is located at the rearmost end of its movement relative to the pen body 1, and the acoustic member housing 602 is located at the rearmost end of its movement relative to the pen body 1.

[0192] The piston rod 502 is fixedly mounted relative to the pen body 1, and the piston cylinder 501 is the movable member of the propulsion mechanism. The acoustic housing 602 is fixedly connected to the piston cylinder 501. The piston cylinder 501 is open rearward, and the piston head 503 is located at the end of the piston rod 502 and engages with the piston cylinder 501.

[0193] The unlocking linear motion member 301 mates with the unlocking rotary motion member 302. The second track 305 engaging member 3012 of the unlocking linear motion member 301 is located in the unlocking positioning portion 309 of the unlocking rotary motion member 302. The unlocking rotary motion member 302 and the rotation locking component 701 are identical components and are collectively referred to as the unlocking rotary motion member 302. Since the second track 305 engaging member 3012 is located in the unlocking positioning portion 309 of the unlocking rotary motion member 302, the retaining protrusion 7011 of the unlocking rotary motion member 302 mates with the retaining track.

[0194] The first track 304 is fixedly mounted on the sidewall of the piston cylinder 501. The first track 304 mating member 3011 of the unlocking linear motion member 301 engages with the first track 304 and is located at the very front end of the first track 304. A first blocking member 802, which propels the initial sounding mechanism, is fixedly mounted on the sidewall of the piston cylinder 501. The front end of the unlocking linear motion member 301 contacts the first blocking member 802. The first sounding member 801 and the unlocking linear motion member 301 are identical components and are hereinafter collectively referred to as the unlocking linear motion member 301. The second rotational elastic element 703 connecting the trigger structure and the rotation locking member 701 and the first rotational elastic element 308 connecting the trigger structure and the unlocking rotary motion member 302 are identical components and are hereinafter collectively referred to as the first rotational elastic element 308.

[0195] The first elastic element 307 that pushes the unlocking linear motion member 301, the propulsion elastic element 505 that pushes the piston cylinder 501, the starting elastic element 803 that pushes the first sound member 801, and the shell elastic element 605 that pushes the sound member shell 602 are the same part, hereinafter collectively referred to as the first elastic element 307.

[0196] The state before use is the state after reset.

[0197] 2. In use.

[0198] The user pulls out the cap 10 and the reset needle 2 .

[0199] The user places the front end of the needle guard against the skin and presses firmly, causing the needle guard to move backward relative to the pen body 1. The needle guard comprises a needle guard head 401 and a needle guard connector 402, which are fixedly connected. The needle guard connector 402 moves backward relative to the pen body 1, pushing the unlocking rotary member 302 and the unlocking linear member 301 backward. The third track 306 mating element 3021 on the outer side of the unlocking rotary member 302 engages with the third track 306, causing the unlocking rotary member 302 to move backward along the third track 306 while simultaneously rotating in a second direction relative to the pen body 1. Since the unlocking linear member 301 cannot rotate relative to the pen body 1, the rotational movement of the unlocking rotary member 302 in the second direction disengages the mating element 3012 of the second track 305 of the unlocking linear member 301 from the unlocking positioning portion 309.

[0200] The engaging piece 3012 of the second track 305 of the unlocking linear motion member 301 disengages from the unlocking positioning portion 309, causing the unlocking linear motion member 301 to move forward along the first track 304 under the push of the first elastic element 307. The unlocking linear motion member 301 moves forward along the first track 304 until it collides with the first blocking member 802 fixed to the outside of the piston cylinder 501, causing a sound to be emitted from the collision.

[0201] After the collision, the first elastic element 307 continues to push the unlocking linear motion member 301 forward, causing it and the piston cylinder 501 to move forward together. The piston cylinder 501 and piston rod 502 move relative to each other. Windows 504 are provided on either side of the piston cylinder 501. The movement of these windows 504 can be observed through the windows 101 on the side of the pen body 1. These windows 504 can be designed in a color different from the pen body 1, such as orange or blue.

[0202] The piston cylinder 501 is fixedly connected to the acoustic member housing 602, and the piston cylinder 501 pushes the acoustic member housing 602 forward relative to the fixed window 603. The fourth track fitting member 6011 of the second acoustic member 601 moves forward along the third sub-track 6073 of the fixed window track 607, while the fourth track fitting member 6011 of the second acoustic member 601 remains stationary relative to the acoustic member housing 602 on the fifth sub-track 6062 of the housing track 606. The acoustic member housing 602 moves forward further, and the fourth track fitting member 6011 of the second acoustic member 601 moves forward along the second sub-track 6072 of the fixed window track 607 while rotating relative to the fixed window 603. It rotates along the fifth track of the outer shell track 606 relative to the sound component outer shell 602; the sound component outer shell 602 moves further forward, and the fourth track matching piece 6011 of the second sound component 601 breaks away from the fifth sub-track 6062 of the outer shell track 606 and enters the fourth sub-track 6061. At the same time, the fourth track matching piece 6011 enters the first sub-track 6071 of the fixed window track 607. Under the action of the second elastic element 604, the second sound component 601 moves forward relative to the sound component outer shell 602 until it collides with the sound component outer shell 602 or the fixed window 603, and the collision makes a sound.

[0203] 3. Status after use.

[0204] The second sound component 601 moves forward relative to the sound component housing 602, colliding and making a sound, indicating the end of advancement. The user removes the simulated injection pen from the skin. Under the action of the skin elastic element 403, the needle guard moves forward relative to the pen body 1 until it reaches the forwardmost position to which it can move. The forward movement of the needle guard drives the unlocking rotary member 302 forward. The unlocking rotary member 302 moves forward until the third track 306 mating member 3021 on the outer side of the unlocking rotary member 302 disengages from the third track 306. The third track 306 mating member 3021 and the stop protrusion 7011 are the same component and are hereinafter collectively referred to as the third track 306 mating member 3021. After the third track 306 engaging member 3021 outside the unlocking rotary member 302 disengages from the third track 306, the unlocking rotary member 302, under the action of the first rotational elastic element 308, rotates relative to the anti-retraction blocking member 702 in the first direction, causing the rear end of the engaging member 3021 of the third track 306 to abut against the anti-retraction blocking member 702. Because the rear end of the needle guard abuts the front end of the unlocking rotary member 302, the needle guard cannot move backward relative to the pen body 1 when the engaging member 3021 of the third track 306 abuts against the anti-retraction blocking member 702.

[0205] The state after use is the state before reset.

[0206] 4. Resetting status.

[0207] The user inserts the reset pin 2 from the front end of the pen body 1, and the reset pin 2 pushes the fourth track matching piece 6011 of the second sound piece 601 to move backward along the fourth sub-track 6061 of the outer shell track 606. At the same time, the fourth track matching piece 6011 of the second sound piece 601 moves backward along the first sub-track 6071 of the fixed window track 607. The reset pin 2 pushes further, and the fourth track matching piece 6011 of the second sound piece 601 enters the fifth sub-track 6062 of the outer shell track 606, so that the second sound piece 601 can It is enough to push the sound component shell 602 to move backward, and at the same time, the fourth track matching piece 6011 of the second sound component 601 enters the second sub-track 6072 of the fixed window track 607, and the second sound component 601 moves backward along the second sub-track 6072 relative to the fixed window 603 while rotating, and the second sound component 601 rotates along the fifth sub-track 6062 relative to the sound component shell 602; the fourth track matching piece 6011 of the second sound component 601 enters the third sub-track 6073 of the fixed window track 607 and moves backward.

[0208] The acoustic member housing 602 is fixedly connected to the piston cylinder 501. When the acoustic member housing 602 moves backward under the push of the second acoustic member 601, the piston cylinder 501 moves backward relative to the piston rod 502. A first blocking member 802 fixed to the sidewall of the piston cylinder 501 pushes the unlocking linear motion member 301 backward. As the unlocking linear motion member 301 moves backward, the mating member 3012 of the second track 305 outside the unlocking linear motion member 301 engages with the second track 305, causing the unlocking linear motion member 301 to move backward while the unlocking rotary motion member 302 rotates in the second direction relative to the backstop blocking member 702. The unlocking rotary motion member 302 rotates in the second direction relative to the backstop blocking member 702, causing the mating member 3021 of the third track 306 outside the unlocking rotary motion member 302 to no longer contact the backstop blocking member 702, and the mating member 3021 of the third track 306 engages with the third track 306. The unlocking linear motion member 301 moves backward until the second track 305 mating member 3012 outside the unlocking linear motion member 301 disengages from the second track 305 and enters the unlocking positioning portion 309. The second track 305 mating member 3012 outside the unlocking linear motion member 301 disengages from the second track 305 and enters the unlocking positioning portion 309, so that the unlocking linear motion member 301 cannot move forward relative to the unlocking rotary motion member 302.

[0209] The reset needle 2 is fully inserted, the cap 10 is installed on the front end of the pen body 1, and the simulated injection pen is in a reset state.

[0210] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A simulation injection pen, characterized in that: include: Pen body, reset structure, resettable unlocking structure, resettable trigger structure, resettable propulsion structure; The unlocking structure and the propulsion structure are installed inside the pen body, and a part of the triggering structure is arranged outside the pen body; The propulsion structure includes two states, namely the propulsion accumulation state and the propulsion end state; the trigger structure includes two states, namely the untriggered state and the triggered state; the unlocking structure includes two states, namely the un-unlocked state and the unlocked state; The trigger structure moves relative to the pen body and changes from an untriggered state to a triggered state; the trigger structure changes to a triggered state, causing the unlocking structure to change from an ununlocked state to an unlocked state; the unlocking structure changes to an unlocked state, causing the propulsion structure to change from a propulsion accumulation state to a propulsion end state; The reset structure cooperates with the propulsion structure, and the reset structure is used to reset the propulsion structure from the propulsion end state to the propulsion accumulation state; the reset structure cooperates with the unlocking structure, and the reset structure is used to reset the unlocking structure from the unlocked state to the unlocked state; Resettable propulsion end sounding structure; The propulsion end sounding structure is installed inside the pen body; The advancing and ending phonation structure includes two states, namely, the phonation accumulation state and the phonation ending state; The propulsion structure changes to the propulsion end state, so that the propulsion end phonation structure changes from the phonation accumulation state to the phonation end state; The reset structure cooperates with the propulsion end sounding structure, and the reset structure is used to reset the propulsion end sounding structure from the sounding end state to the sounding potential accumulation state; The propulsion end sounding structure realizes sounding through ejection collision; the propulsion end sounding structure comprises a second elastic element, a second sound piece and a second blocking component; one end of the second elastic element is fixed relative to the second blocking component, and the other end of the second elastic element acts on the second sound piece; when the propulsion structure is transformed into the propulsion end state, the second sound piece moves relative to the second blocking component under the action of the second elastic element, and the second sound piece collides with the second blocking component to produce a sound; The propulsion end sounding structure also includes a housing elastic element, a housing track and a fixed window track; The second blocking component includes a sound component housing and a fixed window; The second sound component moves in the sound component housing, the housing track is fixedly arranged on the sound component housing, the housing track is L-shaped, the housing track includes a fourth sub-track and a fifth sub-track, the second sound component is provided with a fourth track matching piece, the fourth track matching piece matches with the housing track, so that when the fourth track matching piece is located at the fifth sub-track, the second sound component can rotate relative to the sound component housing and cannot move forward and backward, and when the fourth track matching piece is located at the fourth sub-track, the second sound component can move backward relative to the sound component housing and cannot rotate; The front end of the second elastic element acts on the second sound component, and the rear end of the second elastic element acts on the sound component housing; The acoustic component housing moves forward relative to the fixed window under the action of the housing elastic element, one end of the housing elastic element is fixed relative to the fixed window, and the other end of the housing elastic element is used to push the acoustic component housing; The fixed window track is fixedly arranged on the fixed window, the fourth track matching piece matches with the fixed window track, the fixed window track comprises a first sub-track, a second sub-track and a third sub-track, wherein the first sub-track and the third sub-track are parallel to each other, the first sub-track, the second sub-track and the third sub-track are connected, the rear end of the second sub-track is connected to the front end of the third sub-track, and the front end of the second sub-track is connected to the rear end of the first sub-track, so that the second sound piece moves forward and backward relative to the fixed window on the first sub-track and the third sub-track, and the second sound piece rotates while the second sub-track moves forward and backward relative to the fixed window; The housing track cooperates with the fixed window track so that the fourth track cooperation piece is on the fourth sub-track while the first sub-track is in progress, the fourth track cooperation piece is on the fifth sub-track while the third sub-track is in progress, and the fifth sub-track rotates while the second sub-track is in progress.

2. The simulation injection pen according to claim 1, characterized in that: The propulsion structure comprises a piston cylinder, a piston rod and a propulsion elastic element; the propulsion structure is a piston type structure; the piston rod and the piston cylinder can move relative to each other; The piston rod is fixedly installed relative to the pen body, and the piston cylinder is a movable part of the propulsion structure, or, The piston cylinder is fixedly installed relative to the pen body, and the piston rod is a movable part of the propulsion structure; One end of the propulsion elastic element is fixed relative to the pen body, and the other end of the propulsion elastic element acts on the propulsion structure movable part.

3. The simulation injection pen according to claim 2, characterized in that: The propulsion structure also includes a piston head, which is arranged at the end of the piston rod and cooperates with the piston cylinder.

4. The simulation injection pen according to claim 1 or 3, characterized in that: The unlocking structure includes unlocking linear motion parts, unlocking rotational motion parts, and unlocking fixed parts; When the unlocking structure is in an unlocked state, the unlocking linear motion part and the unlocking rotary motion part are in static cooperation; When the unlocking structure changes from the unlocked state to the unlocked state, the unlocking rotary moving part cooperates with the unlocking fixed part under the push of the trigger structure, and the unlocking rotary moving part moves backward relative to the unlocking fixed part while rotating in the second direction; the unlocking linear moving part moves backward relative to the unlocking fixed part under the push of the unlocking rotary moving part until the unlocking linear moving part is separated from the unlocking rotary moving part; When the unlocking structure is reset from the unlocked state to the unlocked state, the unlocking linear motion part cooperates with the unlocking rotary motion part under the push of the reset structure, the unlocking linear motion part moves backward relative to the unlocking fixed part, and the unlocking rotary motion part rotates in the second direction relative to the unlocking fixed part until the unlocking linear motion part and the unlocking rotary motion part are stationary.

5. The simulation injection pen according to claim 4, characterized in that: The unlocking structure further includes: a first track, a second track, an unlocking positioning portion, a third track, a first elastic element, and a first rotating elastic element; The third track is fixedly arranged on the unlocking fixing member, one end of the first elastic element is fixed relative to the pen body, and the other end of the first elastic element acts on the unlocking linear motion member; A first track matching piece is arranged inside the unlocking linear motion piece, and the first track matching piece matches with the first track, so that the unlocking linear motion piece can move forward and backward relative to the unlocking fixed piece but cannot rotate relative to the unlocking fixed piece; The second track fixing and unlocking positioning part is arranged on the inner side of the unlocking rotary moving part, and the unlocking positioning part is connected to the second track; the second track matching part is arranged on the outer side of the unlocking linear moving part, and the second track matching part matches with the second track, so that when the second track matching part moves backward along the second track, the unlocking rotary moving part rotates in the second direction relative to the unlocking linear moving part; One end of the first rotating elastic element is connected to the trigger structure, and the other end of the first rotating elastic element is connected to the unlocking rotating moving part; the unlocking positioning part is fixedly arranged on the inner side of the unlocking rotating moving part, and the unlocking positioning part is connected to the second track, so that when the second track matching part moves backward along the second track to be separated from the second track, the unlocking rotating moving part rotates in the first direction under the action of the first rotating elastic element, so that the second track matching part matches with the unlocking positioning part; A third track matching piece is arranged outside the unlocking rotating moving piece, and the third track matching piece matches with the third track, so that when the third track matching piece moves backward along the third track, the unlocking rotating moving piece rotates in the second direction relative to the pen body.

6. The simulation injection pen according to claim 3, characterized in that: The trigger structure includes a needle guard and a skin elastic element; The needle guard is arranged at the front end of the pen body, and the needle guard can move back and forth relative to the pen body; one end of the skin elastic element is fixed relative to the pen body, and the other end of the skin elastic element acts on the needle guard; the rear end of the needle guard is connected to one end of the first rotating elastic element, and the rear end of the needle guard resists the front end of the unlocking rotating moving part.

7. The simulation injection pen according to claim 3, 5 or 6, characterized in that: The reset structure includes a reset pin; the reset pin is used to be pushed in from the front end of the pen body.

8. The simulation injection pen according to claim 3, 5 or 6, characterized in that: Also includes a cap; The cap is detachably connected to the front end of the pen body; The reset structure is arranged at the rear end of the pen cap.

9. The simulation injection pen according to claim 3, 5 or 6, characterized in that: The pen body is provided with a window, which is transparent or hollow, so that the user can observe the propulsion structure through the window.

10. The simulation injection pen according to claim 3, 5 or 6, characterized in that: Also includes a resettable backstop structure; The backstop structure is installed inside the pen body; The backstop structure includes two states, namely, the backstop active state and the backstop locked state; The trigger structure moves relative to the pen body, from the triggered state to the untriggered state, so that the stop structure changes from the stop active state to the stop locked state; The stop structure in the stop lock state locks the trigger structure in the untriggered state, and the trigger structure cannot be changed from the untriggered state to the triggered state; The reset structure cooperates with the anti-retraction structure, and the anti-retraction structure is used to reset the anti-retraction structure from the anti-retraction locking state to the anti-retraction active state.

11. The simulation injection pen according to claim 10, characterized in that: The anti-retraction structure comprises a rotation locking component, a second rotation elastic element and an anti-retraction blocking component; The back-stopping blocking component is fixedly mounted on the pen body, one end of the second rotation elastic element is connected to the trigger structure, and the other end of the second rotation elastic element is connected to the rotation locking component, the rotation locking component can rotate relative to the trigger structure, and the rotation locking component cannot move forward and backward relative to the trigger structure; The outer side of the rotation locking component is provided with a stop protrusion, and the stop blocking component is provided with a stop track; When the anti-retraction structure is in the anti-retraction active state, the anti-retraction protrusion cooperates with the anti-retraction track, so that the rotation locking component moves backward relative to the anti-retraction blocking component under the push of the trigger structure; When the trigger structure returns from the triggered state to the untriggered state, the trigger structure drives the rotation locking component to move forward until the stop projection is disengaged from the front end of the stop track. After the stop projection is disengaged from the stop track, the rotation locking component rotates in the second direction under the action of the second rotation elastic element, so that the rear end of the stop projection abuts against the front end of the stop blocking component, thereby preventing the rotation locking component from moving backward. When the anti-retreat structure is in the anti-retreat locking state, the rotation locking component cannot move backward relative to the anti-retreat blocking component in the locked position.

12. The simulation injection pen according to claim 3, 5, 6 or 11, characterized in that: Also included is a resettable propulsion start sounding structure; The propulsion start sounding structure is installed inside the pen body; The structure of advancing the initial phonation includes two states, namely, the phonation accumulation state and the phonation end state; The unlocking structure is changed into the unlocked state, so that the propulsion start sounding structure is changed from the sounding potential accumulation state to the sounding end state; the propulsion start sounding structure is changed into the sounding end state, so that the propulsion structure is changed from the propulsion potential accumulation state to the propulsion end state; The reset structure cooperates with the propulsion start sounding structure, and the reset structure is used to reset the propulsion start sounding structure from the sounding end state to the sounding accumulation state.

13. The simulation injection pen according to claim 12, characterized in that: The propulsion starting sounding structure realizes sound through ejection collision; the propulsion starting sounding structure includes a starting elastic element, a first sound piece and a first blocking component; one end of the starting elastic element is fixed relative to the pen body, and the other end of the starting elastic element acts on the first sound piece; when the unlocking structure is changed to an unlocked state, the first sound piece moves relative to the first blocking component under the action of the starting elastic element, and the first sound piece collides with the first blocking component to produce a sound.

Images