Automatic uniform mixing type protein medicine electric injector and using method thereof

Abstract

The invention discloses an automatic uniform mixing type protein medicine electric injector, which belongs to the technical field of medical apparatus and instruments, and comprises a gun-shaped shell, and an operation unit, a steering engine, a transmission unit, a pressing block sleeve, a spring, a rotating sleeve, a torsion spring and a boosting unit which are arranged on the gun-shaped shell, the pressing block sleeve is further connected to the gun-shaped shell through a spring, the rotating sleeve is rotationally connected with the pressing block sleeve, a torsional spring is further connected between the rotating sleeve and the pressing block sleeve, an arc-shaped guide groove is formed in the rotating sleeve, a guide protrusion in sliding fit with the arc-shaped guide groove is arranged on the gun-shaped shell, and the boosting unit is arranged in the pressing block sleeve. The push rod is used for pushing the double-cavity medicine core mounted in the rotating sleeve; and the steering engine and the boosting unit are controlled by the operation unit. According to the injector, the steering engine serves as a power source, medicine can be automatically shaken up, in other words, the injector is composed of the reciprocating component and the rotating component, the medicine core can be mixed and shaken up through the coupling effect of the reciprocating linear motion and the rotating motion at the same time, the mixing effect is good, and the mixing efficiency is high. The invention further provides a using method of the automatic uniform mixing type protein medicine electric injector.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and provides an automatic mixing protein drug electric injector and a use method thereof. Background Art

[0002] Self-injection by patients has become a treatment method for many chronic diseases due to its convenience. To facilitate patient operation, automatic syringes with pre-filled medicines have appeared on the market. Among them, many injectable medicines are protein drug injections, such as insulin, Ipsy, Omalizumab, etc. However, protein drugs have poorer stability and shorter shelf life than lyophilized powders in solution state. Keeping protein drugs in lyophilized powder state before injection is beneficial to the preservation of drugs. This is also a prerequisite for the storage of some drugs at room temperature. This can be achieved by storing drugs in double-chamber cartridges or double-chamber pre-filled syringes. Double-chamber cartridges or double-chamber pre-filled syringes usually have a rubber piston for push injection and two chambers, one chamber for storing solid powder and the other chamber for storing supporting solvents. An isolation structure that can be removed before injection is set between the two chambers.

[0003] At present, there are many electric injectors on the market, such as a fully automatic insulin injection method and injection pen with Chinese patent publication number CN114432543A, an automatic injector with Chinese patent publication number CN219614595U, etc. However, most of the automatic injectors prefilled with medicine use ordinary cartridge bottles, that is, the bottle is directly filled with injection liquid, and the medicine liquid can be quantitatively pushed out from the bottle mouth by pushing the rubber stopper.

[0004] In order to cooperate with the use of double-chamber cartridge bottles, the syringe needs to meet the following requirements: First, the push rod can be advanced in stages to different set distances to achieve the process of first releasing the isolation and then injecting a certain dose; second, it is convenient to shake the drug to meet the requirement of sufficient solid-liquid mixing; in addition, due to the high viscosity of protein drugs, the injection time is usually longer than that of small molecule drugs of the same dose. Patients will feel uncomfortable if they use uneven force or shake when manually pushing, so the push rod is required to push as evenly and steadily as possible. In addition, in order to facilitate the use of patients, electric syringes are usually required to have the following functions: First, after replacing the drug core once, multiple small-dose injections can be achieved; second, the single injection dose can be adjusted with sufficient adjustment accuracy; third, it is easy to operate, usually only a button is required to trigger.

[0005] The present invention aims to meet the requirements of dual-chamber cartridge injection and to facilitate the injection of protein drugs for patients, and provides a protein drug electric injector capable of automatically mixing drugs. Summary of the invention

[0006] In view of this, the purpose of the present invention is to propose an automatic mixing protein drug electric syringe and a method of using the same, so as to adapt to the use of a double-chamber cartridge (or a double-chamber drug core) and facilitate the injection of protein drugs by patients.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides an automatic mixing type protein drug electric injector, comprising a gun-shaped housing, on which an operating unit, a steering gear, a transmission unit, a pressure block sleeve, a spring, a rotating sleeve, a torsion spring and a booster unit are arranged, wherein: the steering gear is connected to the pressure block sleeve through the transmission unit to provide the rotational motion of the steering gear to the pressure block sleeve and make it slide axially; and the pressure block sleeve is also connected to the gun-shaped housing through the spring to cooperate with the transmission unit so that the axial sliding of the pressure block sleeve has reciprocating linear motion; the steering gear is arranged at the grip of the gun-shaped housing; the pressure block sleeve is located above the steering gear; the transmission unit is composed of a driven disk, a guide rod and a cam, the driven disk is fixed to the bottom of the pressure block sleeve through the guide rod, and the upper end of the guide rod is fixedly connected to the pressure block sleeve, the output shaft of the steering gear is transmission-connected to the cam, and the cam can act on the driven disk; through the design of the cam, the rotational motion of the steering gear can be effectively The rotating sleeve is rotatably connected to the pressing block sleeve at the corresponding end facing the pressing block sleeve, and a torsion spring is connected between the two. The torque provided by the torsion spring cooperates with the reciprocating linear motion of the pressing block sleeve to drive the rotating sleeve to rotate alternately in both directions. The rotating sleeve is provided with an arc guide groove on the outer wall of the end away from the pressing block sleeve, and a guide protrusion that slides with the arc guide groove is provided on the gun-shaped shell. The rotating sleeve is provided with an axially through drug barrel, and the inner wall of the drug barrel at one end close to the pressing block sleeve is provided with an internal thread that is rotatably fixed with the double-chamber drug core. This design ensures that the drug core can be firmly fixed in the drug barrel during installation to avoid loosening or drug leakage during use. The booster unit is provided in the pressing block sleeve and is used to push the double-chamber drug core installed in the rotating sleeve. The operating unit controls the servo and the booster unit. With the above scheme, when the user starts the syringe through the operating unit, the servo starts to work and drives the pressing block sleeve to perform reciprocating linear motion. During the movement of the compression sleeve, the torsion force provided by the torsion spring causes the rotating sleeve to rotate accordingly, ensuring that the two drugs in the double-chamber drug core are fully mixed. The booster unit pushes the mixed drug into the patient's body to achieve efficient and accurate injection. In this way, the syringe has a built-in mixing and shaking mechanism to ensure that the drug is fully mixed before injection and improves the efficacy. The gun-shaped shell design and simple operation unit make it easy for patients to use. At the same time, the electric drive system provides precise dosage control to reduce human errors, and the safety mechanism of the servo and compression sleeve design ensures that the injection will not be performed when it is not ready. In short, the design of this automatic mixing protein drug electric syringe combines modern electric drive technology and a user-friendly operating interface to provide patients with a safe, efficient and convenient self-injection solution.

[0009] Optionally, the gun-shaped housing is provided with a stopper head for disassembling and assembling the double-chamber drug core at the front end away from the grip. In this way, the design of the stopper head allows the user to easily disassemble and assemble the drug core for replacement or maintenance. When the double-chamber drug core needs to be replaced, the user only needs to point the front end of the syringe upwards, press the release button of the stopper head or rotate the stopper head to easily disassemble the drug core. After disassembly, push the new double-chamber drug core in and ensure that it is in place, and then fix the stopper head again.

[0010] Optionally, the lower end of the guide rod is inserted into the linear guide groove of the gun-shaped housing, and the extension direction of the linear guide groove is consistent with the axial sliding direction of the pressure block sleeve. The combined design of the guide rod and the linear guide groove ensures that the pressure block sleeve remains stable during the sliding process, avoiding jitter and deviation during the movement. This structure of the transmission unit is relatively simple, easy to manufacture and maintain, and also reduces the failure rate.

[0011] Optionally, a pressure protrusion and a strip guide groove are provided on the pressure block sleeve. The pressure protrusion is used to connect one end of the spring. The purpose of designing the pressure protrusion is to effectively apply a reset tensile force when the pressure block sleeve reciprocates. Another guide protrusion that slides in cooperation with the strip guide groove is also provided on the gun-shaped housing to ensure that the pressure block sleeve maintains stable and smooth sliding during the entire movement process to avoid deviation and stagnation.

[0012] Optionally, the rotating sleeve is provided with a concentrically mounted connecting cylinder on the same side of the medicine cylinder, and an accommodating chamber for accommodating the torsion spring is formed between the medicine cylinder and the connecting cylinder to ensure the flexibility and stability of the torsion spring during operation.

[0013] Optionally, the booster unit is composed of a motor, a screw and an injection block. The motor is used to drive the screw, and the injection block is set at the front end of the screw facing the double-chamber medicine core. In this way, the motor-driven screw system can efficiently and evenly inject the drug to ensure the accuracy and consistency of the injection. Through the control of the motor, the injection speed and dosage can be flexibly adjusted to meet the needs of different patients or different drugs. At the same time, the structure of the booster unit is relatively simple, easy to manufacture and maintain, and reduces the failure rate; and the design can realize automated injection, reduce the complexity of the patient's operation during the injection process, and improve the safety and convenience of use.

[0014] Optionally, the operating unit is composed of an injection button, a control screen, an adjustment knob and a shake button. The control screen is integrated with a program controller, and the injection button, the adjustment knob and the shake button are all electrically connected to the program controller. The injection button and the adjustment knob are also electrically connected to the motor, and the shake button is also electrically connected to the steering gear. In this way, the design of the operating unit enables the user to control the syringe intuitively and easily, reducing the complexity of operation. And through the integration of the program controller, efficient control of the motor, steering gear, etc. can be achieved, improving the accuracy and safety of the injection. The real-time information display of the control screen enables the user to understand the status of the syringe at any time, enhancing the sense of security in use. Also through the adjustment knob, the user can flexibly adjust the injection parameters as needed to meet the needs of different drugs and patients. In short, the design structure of the operating unit ensures the ease of use and efficiency of the automatic mixing type protein drug electric syringe. Through the intelligent control of the program controller, the user can easily set and monitor the injection process, improving the overall performance and user experience of the syringe.

[0015] The present invention is also based on the method for using the above-mentioned automatic mixing protein drug electric injector, comprising the following steps:

[0016] B1), using the limit head at the front end of the gun-shaped shell to disassemble and assemble the double-chamber core of the rotating sleeve;

[0017] B2), press the shake button to start the booster unit, so that the motor drives the screw rod to rotate and push the injection block to release the solid-liquid isolation of the double-chamber medicine core; then, the motor is turned off, and the steering gear automatically operates, so that the cam drives the driven plate to drive the pressing block sleeve to move forward and backward in a straight line under the guidance of the guide rod and the linear guide groove and the extension and stretching of the spring, and the synchronous rotating sleeve is driven by the pressing block sleeve and the arc guide groove and the guide protrusion and the torsion and stretching of the torsion spring to couple to form forward and reverse rotation until the protein drug in the double-chamber medicine core is shaken evenly;

[0018] B3), rotating the adjustment knob to adjust the preset injection volume, and setting the rotation angle of the motor of the booster unit in subsequent injections according to the preset injection volume;

[0019] B4), remove the safety cap that comes with the needle, hold the handle of the gun-shaped shell, and stably place the front limit head on the skin of the injection site, then press the injection button to make the servo drive the cam to rotate to the maximum angle and maintain it. At this time, the pressure block sleeve stops the rotating sleeve and is at the front end, so that the injection needle of the double-chamber medicine core pierces the skin of the injection site, and then the motor drives the screw rod to push the injection block to push out the corresponding dose of medicine according to the preset injection volume. Finally, the servo and motor are controlled to reset the pressure block sleeve, the rotating sleeve and the booster unit to complete the injection.

[0020] The beneficial effects of the present invention are:

[0021] 1. The automatic mixing protein drug electric injector mentioned in the present invention uses a steering gear as a power source to automatically shake the medicine. That is, it consists of a reciprocating motion component and a rotating component, which can enable the medicine core to simultaneously achieve the coupling effect of reciprocating linear motion and rotational motion to mix and shake, so that the mixing effect is good and the mixing efficiency is high.

[0022] 2. The automatic mixing protein drug electric injector mentioned in the present invention is controlled by a single-chip microcomputer, and the single-chip microcomputer is combined with a motor and a servo with a subdivision function. The motor and the servo can be controlled by a simple program and an existing algorithm to achieve high-precision quantitative and approximately uniform injection.

[0023] 3. The automatic mixing protein drug electric injector mentioned in the present invention has a control interface provided with a control screen, a shake button, an injection button, and an adjustment knob. By pressing the shake button with one key, the drug can be mixed; by pressing the injection button with another key, the drug can be injected; and by rotating the adjustment button with one key, the injection volume can be adjusted; the entire operation is simple and easy to learn.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0027] Figure 2 for Figure 1 A partial cross-sectional view of

[0028] Figure 3 for Figure 1 Schematic diagram of the internal structure;

[0029] Figure 4 for Figure 1 A stereoscopic view of the pressing block sleeve in FIG.

[0030] Figure 5 for Figure 1 A three-dimensional diagram of the rotating sleeve in FIG.

[0031] Figure 6 for Figure 5 Axial section of the

[0032] Figure 7 for Figure 1 Overall axial section plan view;

[0033] Figure numerals: 1-gun-shaped housing, 11-limiting head, 12-handle, 13-guide protrusion, 14-linear guide groove; 2, operating unit, 21-injection button, 22-control screen, 23-adjusting knob, 24-shake button; 3-servo engine, 31-output shaft; 4-transmission unit, 41-driven disk, 42-guide rod, 43-cam; 5-pressure block sleeve, 51-pressure protrusion, 52-strip guide groove; 6-spring; 7-rotating sleeve, 71-arc guide groove, 72-accommodating chamber, 73-internal thread, 74-drug cartridge, 75-connecting cylinder; 8-torsion spring; 9-boost unit, 91-motor, 92-screw rod, 93-injection block; 10-double-chamber medicine core. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0035] like Figure 1-7As shown, an automatic mixing protein drug electric injector mentioned in the present invention comprises a gun-shaped housing 1 with a hollow structure, which is designed in a gun shape for easy holding and operation by patients. The gun-shaped housing 1 is provided with an operating unit 2, a steering gear 3, a transmission unit 4, a pressure block sleeve 5, a spring 6, a rotating sleeve 7, a torsion spring 8 and a booster unit 9, wherein: the gun-shaped housing 1 is provided with a limit head 11 for disassembling and assembling a double-chamber drug core 10 at the front end away from its grip 12, and the limit head 11 has an opening through which an injection needle (not shown) provided at the front end of the double-chamber drug core 10 passes, and a cavity for accommodating the steering gear 3 and a power supply (not shown) is provided inside the rear grip 12. The power supply is a conventional device as a power source for providing electrical energy to the steering gear 3, and no further description will be given. The servo 3 is responsible for converting the electrical signal into mechanical motion, and driving the axial sliding of the pressing sleeve 5 through the transmission unit 4 to achieve the mixing and injection of protein drugs, that is, the servo 3 is connected to the pressing sleeve 5 through the transmission unit 4, so as to provide the rotational motion of the servo 3 to the pressing sleeve 5 and make it slide axially; and the pressing sleeve 5 is also connected to the gun-type housing 1 through a spring 6, so as to cooperate with the transmission unit 4 so that the axial sliding of the pressing sleeve 5 has a reciprocating linear motion; the servo 3 is arranged at the handle 12 of the gun-type housing 1; the pressing sleeve 5 is located above the servo 3; in this way, the pressing sleeve 5 performs a reciprocating linear motion under the control of the servo 3, and the pressing sleeve 5 is connected to the gun-type housing 1 through the spring 6 to ensure that the reciprocating motion of the pressing sleeve 5 is stable.

[0036] The transmission unit 4 is responsible for connecting the steering gear 3 and the pressure block sleeve 5 to convert the rotational motion of the steering gear 3 into the axial motion of the pressure block sleeve 5. It is composed of a driven plate 41, a guide rod 42 and a cam 43. The driven plate 41 is fixed to the bottom of the pressure block sleeve 5 through the guide rod 42, and the upper end of the guide rod 42 is fixedly connected to the pressure block sleeve 5, and is responsible for converting the rotational motion of the steering gear 3 into linear motion. The lower end of the guide rod 42 is inserted into the linear guide groove 14 of the gun-shaped housing 1, and the linear guide groove 14 has a certain length. degree, and its extension direction is consistent with the axial sliding direction of the block sleeve 5, so as to adapt to the block sleeve 5 with reciprocating linear motion and the guide rod 42 of the transmission unit 4 fixed thereon, to ensure the smooth sliding of the block sleeve 5 and avoid deflection; the output shaft 31 of the steering gear 3 is connected with the cam 43 in transmission, and the cam 43 can act on the driven disk 41, that is, the cam 42 contacts the driven disk 41 during the process of rotating with the steering gear 3, and can convert the rotational motion of the steering gear 3 into the motion of the driven disk 41. In this way, when the steering gear 3 is started, the rotation of the output shaft 31 causes the cam 43 to rotate, and the shape of the cam 43 causes the driven disk 41 to perform linear motion under the guidance of the guide rod 42, thereby driving the block sleeve 5 to cooperate with the spring 6 to perform reciprocating sliding. At the same time, by adjusting the rotation speed and angle of the steering gear 3, the movement of the block sleeve 5 can be accurately controlled, thereby realizing the rotational coordination of the rotating sleeve 7 and accurate injection control. The design structure of the transmission unit 4 greatly improves the performance and stability of the automatic mixing type protein drug electric injector. Through precise mechanical structure and motion conversion method, the syringe can achieve efficient and accurate drug injection to meet the needs of patients.

[0037] The rotating sleeve 7 is rotatably connected to the pressing block sleeve 5 at the corresponding end facing the pressing block sleeve 5. The rotatable connection structure can adopt a bearing connection structure, or a ring groove and annular convex strip auxiliary structure, and a torsion spring 8 is also connected between the two. The design of the torsion spring 8 can provide the necessary torsional resilience for the rotating sleeve 7; the torsion provided by the torsion spring 8 cooperates with the reciprocating linear motion of the pressing block sleeve 5 to enable the rotating sleeve 7 to have positive and negative alternating rotation while following the forward and backward movement of the pressing block sleeve 5; the rotating sleeve 7 is provided with an arc-shaped guide groove 71 on the outer wall of the away end away from the pressing block sleeve 5, and the gun-shaped housing 1 is provided with a guide protrusion 13 that slidably cooperates with the arc-shaped guide groove 71, that is, the gun-shaped housing 1 is provided with a threaded hole for installing the guide protrusion 13, and the guide protrusion 13 is provided with a countersunk through hole, so that the guide protrusion 13 is fixed to the gun-shaped housing 1 by bolt connection, and the guide protrusion 13 axially extends into the arc-shaped guide groove 71 of the rotating sleeve 7 and slides and fits therewith to guide and position, so as to cooperate with the torsion spring 8 so that the rotation of the rotating sleeve 7 has positive and negative alternating rotation; the rotating sleeve 7 is used to install the double-chamber medicine core 10, and the rotating sleeve 7 is provided with an axially through medicine barrel 74, and the medicine barrel 75 is provided with an internal thread 73 on the inner wall of one end close to the pressure block sleeve 5 for rotation and fixation with the double-chamber medicine core 10; the rotating sleeve 7 is provided with a concentrically sleeved connecting cylinder 75 on the same side of the medicine barrel 74, and a accommodating chamber 72 for accommodating the torsion spring 8 is formed between the medicine barrel 74 and the connecting cylinder 75.

[0038] The booster unit 9 is arranged in the pressing block sleeve 5, and is used to push the double-chamber medicine core 10 installed in the rotating sleeve 7, which is responsible for pushing the mixed protein drug into the patient's body; the booster unit 9 is composed of a motor 91, a screw 92 and a push block 93. The motor 91 adopts a through-type motor, which is the output power of the booster unit 9 and is responsible for driving the rotation of the screw 92. The motor should be selected to be efficient and fast-responding to ensure that precise control can be achieved during the injection process, and the speed and steering adjustment of the motor 91 can be achieved to meet the injection requirements of different drugs. Its output shaft is used to drive the screw 92, which is connected to the motor 91 and is responsible for converting the rotational motion of the motor 91 into linear motion. The design of the screw 92 should have good wear resistance and strength to withstand the pressure during the push injection process. A push block 93 is set at the front end of the screw 92, and the shape and size of the push block should be adapted to the double-chamber medicine core to ensure that the drug can be effectively pushed. The push block 93 is a component that directly contacts the medicine core. Its design should ensure that it can apply pressure evenly and push the medicine into the patient's body. When the user starts the syringe through the operating unit, the motor starts working and drives the screw to rotate. The rotation of the screw will be converted into linear movement of the push block, which moves forward and applies pressure to push the medicine in the double-chamber medicine core out. Through the control of the motor, the moving speed and distance of the push block can be accurately adjusted, thereby achieving accurate control of the injection dose.

[0039] The operating unit 2 can be used by the patient to control various functions of the syringe, such as controlling the working state of the steering engine 3 and the booster unit 9. The user can select parameters such as injection dose and speed through buttons or control screens. The operating unit 2 is composed of an injection button 21, a control screen 22, an adjustment knob 23 and a shake button 24. The control screen 22 is a touch screen, which is integrated with a program controller. The injection button 21, the adjustment knob 23 and the shake button 24 are all electrically connected to the program controller. The injection button 21 and the adjustment knob 23 are also electrically connected to the motor 91, and the shake button 24 is also electrically connected to the steering engine 3. In this way, the user sets the injection dose and speed by adjusting the knob. After pressing the injection button, the program controller receives the signal and starts the motor and the booster unit to start the injection process. If the drug needs to be shaken, the user can press the shake button, and the program controller will instruct the steering engine to rotate the rotating sleeve to ensure that the drug is fully mixed. In addition, the program controller is a conventional device. If a single-chip microcomputer automatic control technology is adopted, the control program can be implemented by simple programming by technicians in this field, which is common knowledge in this field. Moreover, the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain in detail the control method and the integrated circuit connection of the single-chip microcomputer.

[0040] In this embodiment, the pressure block sleeve 5 is provided with a pressure protrusion 51 and a strip guide groove 52. The pressure protrusion 51 is used to connect one end of the spring 6. The gun-shaped housing 1 is also provided with another guide protrusion 13 that slides with the strip guide groove 52. For example, the pressure block sleeve 5 is a double-layer sleeve as a whole. The outer wall of the pressure block sleeve 5 is provided with a strip guide groove 52. The strip guide groove 52 is adapted to the guide protrusion 13 to better assist the reciprocating linear motion of the pressure block sleeve 5. The front end of the pressure block sleeve 5 is provided with a pressure protrusion 51. The pressure protrusion 51 is connected to the spring 6 so that the spring 6 can exert an elastic force on the pressure block sleeve 5. The other end of the spring 6 is fixedly connected to the gun-shaped housing 1.

[0041] The following is a detailed introduction to the use of the automatic mixing protein drug electric syringe, including the following:

[0042] Step 1, remove the limit head 11 at the front end of the gun-shaped shell 1. Since the inner wall of the medicine barrel 74 of the rotating sleeve 7 is provided with an internal thread 73 threadably connected to the double-chamber medicine core 10, the double-chamber medicine core 10 containing the protein drug lyophilized powder and the supporting solution is installed into the rotating sleeve 7 through the internal thread 73, and the injection needle is installed at the front end of the double-chamber medicine core 10, and then the limit head 11 is reinstalled.

[0043] Step 2: Press the shake button 24, the control screen 22 prompts the shake state, the motor 91 of the booster unit 9 is started, the motor 91 drives the screw 92 to rotate, and pushes the injection block 93 to the set position, so that the solid-liquid isolation of the double-chamber drug core 10 is released, and the protein drug lyophilized powder and the supporting solution therein begin to mix; then, the motor 91 is turned off, and the steering gear 3 is started, and the output shaft 31 of the steering gear 3 drives the cam 43 to rotate within the set angle, and then the cam 43 pushes the driven plate 41 to rotate between the guide rod 42 and the through-type linear guide of the gun-shaped housing 1. Under the guidance of the arc-shaped guide groove 14, the pressure block sleeve 5 performs a linear motion forward (or leftward), and because the driven plate 41 and the pressure block sleeve 5 are fixedly connected through the guide rod 42, the pressure block sleeve 5 and the driven plate 41 move forward (or leftward) synchronously, and the spring 6 is stretched and retracted; then, the pressure block sleeve 5 pushes the rotating sleeve 7 to move forward (or leftward), and the rotating sleeve 7 simultaneously performs a clockwise rotational motion under the cooperation of the arc-shaped guide groove 71 and the guide protrusion 13 of the gun-shaped housing 1, and at this time, the guide protrusion 13 moves from the rear end of the arc-shaped guide groove 71 to the front end (or the right end to the left end), as shown in FIG. Figure 3 As shown, the torsion spring 8 is twisted and stretched; then, when the guide rod 42 of the driven disk 41 reaches the maximum stroke of the front end (left end) relative to the linear guide groove 14, and the guide protrusion 13 also reaches the maximum stroke of the front end (left end) relative to the arc guide groove 71, that is, when the convex end of the cam 43 rotates, the spring 6 releases the energy stored in the stretching process, and the pressure block sleeve 5 moves backward (or rightward) linearly and resets, and the torsion spring 8 simultaneously releases the energy stored in the twisting and stretching process, so that the rotating sleeve 7 rotates counterclockwise and resets at the same time; then, because the cam 43 reciprocates multiple times within the set angle, the above-mentioned process with the servo 3 as an output power is performed multiple times, and is coupled with the reciprocating linear motion of the pressure block sleeve 5 and the forward and reverse rotation operation of the rotating sleeve 7, until the protein drug in the double-chamber medicine core 10 is shaken evenly.

[0044] Step 3, rotate the adjustment knob 23, the control screen 22 prompts the adjustment status and displays the preset injection volume; then, the adjustment knob 23 is turned forward, the preset injection volume increases, and the adjustment knob 23 is turned reversely, the preset injection volume decreases; synchronously, the program controller calculates the rotation angle of the corresponding motor 91 according to the preset injection volume according to the preset program;

[0045] Step 4, remove the safety cap that comes with the needle, hold the handle 12 at the rear of the gun-shaped shell 1, and place the limit head 11 at the front end stably on the skin of the injection site. After stabilization, press the injection button 21, the control screen 22 prompts the injection status, and the steering gear 3 drives the cam 43 to rotate to the maximum angle and maintain it. At this time, the pressing block sleeve 5 stops the rotating sleeve 7 to the left to the maximum stroke, that is, the guide protrusion 13 stops at the front end of the arc guide groove 71, and the front end of the rotating sleeve 7 reaches the limit head 11, and the injection needle of the double-chamber medicine core 10 penetrates the skin of the injection site. Then, the program controller controls the motor 91 to rotate forward, and the motor 91 drives the screw rod 92 to advance, so that the push block 93 pushes out the corresponding dose of medicine according to the preset injection volume; finally, the motor 91 and the steering gear 3 are controlled to rotate to reset the rotating sleeve 7, the pressing block sleeve 5 and the booster unit 9 to complete the drug injection.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An automatic mixing protein drug electric injector, comprising a gun-shaped housing (1), characterized in that: The gun-shaped housing (1) is provided with an operating unit (2), a steering gear (3), a transmission unit (4), a pressure block sleeve (5), a spring (6), a rotating sleeve (7), a torsion spring (8) and a booster unit (9), wherein: The steering gear (3) is connected to the pressure block sleeve (5) through the transmission unit (4) to provide the rotational motion of the steering gear (3) to the pressure block sleeve (5) and make it slide axially; and the pressure block sleeve (5) is also connected to the gun-shaped housing (1) through the spring (6) to cooperate with the transmission unit (4) so ​​that the axial sliding of the pressure block sleeve (5) has reciprocating linear motion; the steering gear (3) is arranged at the handle (12) of the gun-shaped housing (1); the pressure block sleeve (5) is located above the steering gear (3); The transmission unit (4) is composed of a driven disc (41), a guide rod (42) and a cam (43); the driven disc (41) is fixed to the bottom of the pressure block sleeve (5) through the guide rod (42); the output shaft (31) of the steering gear (3) is connected to the cam (43) in a transmission manner, and the cam (43) can act on the driven disc (41); The rotating sleeve (7) is rotatably connected to the pressing block sleeve (5) at the corresponding end facing the pressing block sleeve (5), and the torsion spring (8) is also connected between the two, and the torsion force provided by the torsion spring (8) cooperates with the reciprocating linear motion of the pressing block sleeve (5) to drive the rotating sleeve (7) to rotate alternately forward and reverse; the rotating sleeve (7) is provided with an arc-shaped guide groove (71) on the outer wall of the away end away from the pressing block sleeve (5), and the gun-shaped housing (1) is provided with a guide protrusion (13) that slidably cooperates with the arc-shaped guide groove (71); The rotating sleeve (7) is provided with an axially penetrating medicine cartridge (74), and the medicine cartridge (75) is provided with an internal thread (73) on the inner wall of one end close to the pressing block sleeve (5) for rotationally fixing with the double-chamber medicine core (10); The boosting unit (9) is arranged in the pressing block sleeve (5) and is used to push the double-chamber medicine core (10) installed in the rotating sleeve (7); The operating unit (2) controls the steering engine (3) and the thrust unit (9).

2. The automatic mixing protein drug electric injector according to claim 1, characterized in that: The gun-shaped housing (1) is provided with a limiting head (11) at the front end away from the grip (12) for disassembling and assembling the double-chamber core (10).

3. The automatic mixing protein drug electric injector according to claim 1, characterized in that: The upper end of the guide rod (42) is fixedly connected to the pressure block sleeve (5), and the lower end of the guide rod (42) is inserted into the linear guide groove (14) of the gun-shaped housing (1). The extension direction of the linear guide groove (14) is consistent with the axial sliding direction of the pressure block sleeve (5).

4. The automatic mixing protein drug electric injector according to claim 1, characterized in that: The pressure block sleeve (5) is provided with a pressure protrusion (51) and a strip guide groove (52), the pressure protrusion (51) is used to connect one end of the spring (6), and the gun-shaped housing (1) is also provided with another guide protrusion (13) that cooperates and slides with the strip guide groove (52).

5. The automatic mixing protein drug electric injector according to claim 1, characterized in that: The rotating sleeve (7) is provided with a concentrically mounted connecting cylinder (75) on the same side as the medicine cylinder (74), and a receiving chamber (72) for accommodating the torsion spring (8) is formed between the medicine cylinder (74) and the connecting cylinder (75).

6. The automatic mixing protein drug electric injector according to any one of claims 1 to 5, characterized in that: The boosting unit (9) is composed of a motor (91), a screw rod (92) and a push block (93); the motor (91) is used to drive the screw rod (92); the push block (93) is arranged at the front end of the screw rod (92) facing the double-chamber medicine core (10).

7. The automatic mixing protein drug electric injector according to claim 6, characterized in that: The operating unit is composed of an injection button (21), a control panel (22), an adjustment knob (23) and a shake button (24); the control panel (22) is integrated with a program controller; the injection button (21), the adjustment knob (23) and the shake button (24) are all electrically connected to the program controller; the injection button (21) and the adjustment knob (23) are also electrically connected to the motor (91); and the shake button (24) is also electrically connected to the steering gear (3).

8. The method for using the automatic mixing protein drug electric injector according to claim 7, characterized in that: The steps include: B1), using the limiting head (11) at the front end of the gun-shaped housing (1) to disassemble and assemble the double-chamber core (10) on the rotating sleeve (7); B2), press the shake button (24), start the booster unit (9), so that the motor (91) drives the screw rod (92) to rotate and push the injection block (93) to release the solid-liquid isolation of the double-chamber medicine core (10); then, the motor (91) is turned off, and the steering gear (3) automatically operates, so that the cam (43) drives the driven plate (41) to drive the pressing block sleeve (5) to move forward and backward in a straight line under the guidance of the guide rod (42) and the linear guide groove (14) and in coordination with the expansion and contraction of the spring (6), and the synchronous rotating sleeve (7) is driven by the pressing block sleeve (5) and under the guidance of the arc-shaped guide groove (71) and the guide protrusion (13) and in coordination with the torsion and extension of the torsion spring (8) to couple to form forward and reverse rotation until the protein drug in the double-chamber medicine core (10) is shaken evenly; B3), rotating the adjustment knob (23) to adjust the preset injection volume, and setting the rotation angle of the motor (91) of the booster unit (9) in subsequent injections according to the preset injection volume; B4), remove the safety cap attached to the needle, hold the handle (12) of the gun-shaped housing (1), and stably place the limit head (11) at the front end on the skin of the injection site, then press the injection button (21), so that the steering gear (3) drives the cam (43) to rotate to the maximum angle and maintain it, at which time the pressing block sleeve (5) abuts against the rotating sleeve (7) and is located at the front end, so that the injection needle of the double-chamber medicine core (10) then pierces the skin of the injection site, then the motor (91) drives the screw rod (92) to push the injection block (93) and push out the corresponding dose of medicine according to the preset injection volume, finally, control the steering gear (3) and the motor (91) to reset the pressing block sleeve (5), the rotating sleeve (7) and the booster unit (9), and complete the injection.

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