Intelligent injector for protein drugs

Abstract

The utility model discloses an intelligent injector for protein medicine, which belongs to the technical field of medical instruments and comprises a gun-shaped shell, an operating unit, a steering engine, a transmission unit, a pressing block sleeve, a spring, a rotating sleeve, a torsion spring and a boosting unit, the steering engine is connected to the pressing block sleeve through the transmission unit, and the pressing block sleeve is further connected to the gun-shaped shell through the 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 and used for pushing the double-cavity medicine core; and the steering engine and the boosting unit are controlled by the operation unit. According to the utility model, the steering engine is used as a power source, the medicament can be automatically and uniformly shaken, namely, the device consists of two parts, namely the reciprocating component and the rotating component, so that the medicament core can be simultaneously mixed and uniformly shaken under the coupling action of the reciprocating linear motion and the rotating motion, and the mixing effect is good and the mixing efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the medical instrument technical field, provide a protein medicine intelligent injector. BACKGROUND

[0002] Patient self-injection has become a treatment method for many chronic diseases due to its convenience. In order to facilitate patient operation, automatic injectors using pre-filled drugs have appeared on the market. Among them, many injected drugs are protein drug injections, such as insulin, epoetin, omalizumab, etc. Protein drugs in solution state have poorer stability and shorter shelf life than lyophilized powder. Keeping protein drugs in lyophilized powder state before injection is beneficial to drug preservation, which is also a prerequisite for normal temperature storage of some drugs, which can be achieved by using double-chamber cartridge bottles or double-chamber pre-filled injectors. Double-chamber cartridge bottles or double-chamber pre-filled injectors usually have a rubber piston for bolus injection and two chambers, one chamber stores solid drug powder, and the other chamber stores matching solvent, and an isolation structure is provided between the two chambers which can be removed before injection.

[0003] At present, there are many electric injectors on the market, such as a kind of full-automatic insulin injection method and injection pen with patent number CN114432543A, and an automatic injector with patent number CN219614595U. However, most automatic injectors for pre-filled drugs use ordinary cartridge bottles, i.e. the bottle is directly filled with injection liquid, and the rubber plug can be pushed to make the liquid quantitatively push out from the bottle opening.

[0004] To cooperate with the use of double-chamber cartridge bottles, the injector needs to meet the following requirements: first, the injection rod can be advanced in different stages to achieve the process of first removing the isolation and then injecting a certain dose; second, it is convenient to shake the drug to meet the requirement of fully mixing the solid and liquid; in addition, due to the high viscosity of protein drugs, the injection time is usually longer than that of small molecule drugs with the same dose, and uneven force or shaking during manual injection by patients will cause discomfort, so the injection rod is required to be advanced as uniformly and stably as possible. In addition, in order to facilitate the use of patients, the electric injector usually has the following functions: first, after replacing the drug core, it can realize multiple small dose injections; second, it can adjust the single injection dose with sufficient adjustment accuracy; third, the operation is simple, usually only needs to press the key to activate.

[0005] The utility model provides a protein medicine intelligent injector aiming at the requirement of adapting double-chamber cartridge bottle injection, and taking the convenience of patient injection of protein drugs as the improvement target. SUMMARY

[0006] Therefore, the utility model aims at providing a protein medicine intelligent injector to adapt to the use of double-chamber cartridge bottles (or double-chamber drug cores) and facilitate the injection of protein drugs by patients.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of protein medicine intelligent injector, including gun type shell, operation unit, rudder, transmission unit, briquetting sleeve, spring, rotating sleeve, torsional spring and boost unit are provided on the gun type shell, wherein: rudder is connected in briquetting sleeve by transmission unit, to provide the rotary motion of rudder to briquetting sleeve and make it do axial sliding;And briquetting sleeve is also connected in gun type shell by spring, to make the axial sliding of briquetting sleeve have reciprocating linear motion with transmission unit cooperation;Rudder is arranged at the handle of gun type shell;Briquetting sleeve is located above rudder;Rotating sleeve is rotationally connected with briquetting sleeve at corresponding end facing briquetting sleeve, and torsional spring is also connected between the two, and the torsional force provided by torsional spring cooperates with the reciprocating linear motion of briquetting sleeve to drive rotating sleeve positive and negative alternate rotation;Arc-shaped guide groove is formed on the outer wall of the end of rotating sleeve away from briquetting sleeve, and guide protrusion is arranged on gun type shell and slidably cooperates with arc-shaped guide groove;Boost unit is arranged in briquetting sleeve, and is used to push double-cavity medicine core installed in rotating sleeve;Rudder and boost unit are controlled by operation unit. When user starts injector by operation unit, rudder starts to work, and drives briquetting sleeve to reciprocate linearly. And in the movement process of briquetting sleeve, the torsional force provided by torsional spring makes rotating sleeve rotate, to ensure that two kinds of medicines in double-cavity medicine core are mixed sufficiently. Boost unit pushes the mixed medicine into patient's body, to realize efficient and accurate injection. In this way, the built-in mixing and shaking mechanism of the injector ensures that medicine is mixed sufficiently before injection, to improve curative effect, and gun type shell design and simple operation unit enable patient to use easily, meanwhile, electric drive system provides accurate dose control, to reduce human error, and the safety mechanism designed by rudder and briquetting sleeve ensures that injection is not performed when not ready. In general, the design of the protein medicine intelligent injector combines modern electric drive technology and user-friendly operation interface, to provide a safe, efficient and convenient self-injection solution for patient.

[0009] Optionally, limit head for disassembling double-cavity medicine core is arranged on the front end of gun type shell away from handle. In this way, the design of limit head allows user to disassemble medicine core conveniently, to facilitate replacement or maintenance. When double-cavity medicine core needs to be replaced, user only needs to put the front end of injector upwards, press release button of limit head or rotate limit head, to disassemble medicine core easily. After disassembly, new double-cavity medicine core is pushed in and ensured to be in place, and limit head is fixed again.

[0010] Optionally, the transmission unit is composed of a driven disc, a guide rod and a cam, the driven disc is fixed at the bottom of the pressing sleeve through the guide rod, the upper end of the guide rod is fixedly connected with the pressing sleeve, the lower end of the guide rod penetrates through the linear guide groove of the gun-shaped shell, and the extension direction of the linear guide groove is consistent with the axial sliding direction of the pressing sleeve; the output shaft of the steering engine is in transmission connection with the cam, and the cam can act on the driven disc. In this way, through the design of the cam, the rotary motion of the steering engine can be effectively converted into linear motion, and the efficiency of power transmission is improved. The combination design of the guide rod and the linear guide groove ensures that the pressing sleeve remains stable during the sliding process, and avoids shaking and deviation during the motion process. The structure of the transmission unit is relatively simple, facilitating manufacturing and maintenance, and reducing the failure rate.

[0011] Optionally, the pressing sleeve is provided with a pressing protrusion and a strip-shaped guide groove, the pressing protrusion is used for connecting one end of the spring, and the design purpose of the pressing protrusion is to effectively apply a reset tensile force when the pressing sleeve reciprocates. The gun-shaped shell is also provided with another guide protrusion that slides in cooperation with the strip-shaped guide groove, so as to ensure that the pressing sleeve smoothly slides stably during the entire motion process, and avoid deviation and jamming.

[0012] Optionally, the rotating sleeve is provided with an axial through medicine cylinder, and the medicine cylinder is provided with an internal thread for fixing the double-cavity type medicine core on the inner wall of one end close to the pressing sleeve; this design ensures that the medicine core can be firmly fixed in the medicine cylinder during installation, avoiding loosening or drug leakage during use. The connecting cylinder is coaxially sleeved on the same side of the medicine cylinder, and a containing chamber for accommodating the torsional spring is formed between the medicine cylinder and the connecting cylinder, so as to ensure the flexibility and stability of the torsional spring during work.

[0013] Optionally, the boosting unit is composed of a motor, a lead screw and a injection block, the motor is used to drive the lead screw, and the injection block is arranged at the front end of the lead screw facing the double-cavity type medicine core. In this way, the motor-driven lead screw system can efficiently and uniformly inject medicine, ensuring the accuracy and consistency of injection. Through the control of the motor, the injection speed and dose can be flexibly adjusted to meet the needs of different patients or different medicines. At the same time, the structure of the boosting unit is relatively simple, facilitating manufacturing and maintenance, and reducing the failure rate; and the design can realize automatic injection, reducing the operation complexity of the patient during injection, improving the safety and convenience of use.

[0014] Optionally, the operation unit is composed of an injection button, a control screen, an adjusting knob and a shaking button, the control screen is integrated with a program controller, the injection button, the adjusting knob and the shaking button are electrically connected with the program controller, the injection button and the adjusting knob are further electrically connected with the motor, and the shaking button is further electrically connected with the steering engine. In this way, the design of the operation unit enables the user to intuitively and easily control the injector, reducing the operation complexity. Through the integration of the program controller, efficient control of the motor, the steering engine and the like can be realized, improving the precision and safety of injection. The real-time information display of the control screen enables the user to know the state of the injector at any time, enhancing the safety of use. Through the adjusting knob, the user can flexibly adjust the injection parameters according to the needs, meeting the needs of different drugs and patients. In summary, the design structure of the operation unit ensures the ease of use and efficiency of the protein drug intelligent injector. Through the intelligent control of the program controller, the user can conveniently set and monitor the injection process, improving the overall performance and user experience of the injector.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The protein drug intelligent injector mentioned in the utility model can realize automatic shaking of the medicament through the steering engine as a power source, that is, it is composed of a reciprocating motion component and a rotating component, can realize the coupling of reciprocating linear motion and rotating motion of the medicine core to mix and shake, and has good mixing effect and high mixing efficiency.

[0017] 2. The protein drug intelligent injector mentioned in the utility model is controlled by a single-chip microcomputer, the single-chip microcomputer is combined with a motor and a steering engine with a subdivision function, and the motor and the steering engine can be controlled through a simple program and an existing algorithm to realize quantitative injection with high precision and approximate uniform speed.

[0018] 3. The protein drug intelligent injector mentioned in the utility model is provided with a control screen, a shaking button, an injection button and an adjusting knob on the control interface, the medicine can be mixed through one-key pressing of the shaking button, the medicine can be injected through one-key pressing of the injection button, and the injection amount can be adjusted through one-key rotation of the adjusting knob, so that the whole operation is simple and easy to learn.

[0019] Other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in preferred detail below in combination with the drawings, wherein

[0021] Figure 1 It is the overall structure perspective view of the utility model;

[0022] Figure 2 It is the partial sectional view in Figure 1 ;

[0023] Figure 3 It is the internal structure schematic view of Figure 1 ;

[0024] Figure 4 It is the briquetting sleeve perspective view in Figure 1 ;

[0025] Figure 5 It is the rotating sleeve perspective view in Figure 1 ;

[0026] Figure 6 It is the axial sectional plane view of Figure 5 ;

[0027] Figure 7 It is the overall axial sectional plane view of Figure 1 ;

[0028] Reference signs: 1-gun-shaped shell, 11-limiting head, 12-grip, 13-guiding protrusion, 14-linear guide groove;2, operation unit, 21-injection button, 22-control screen, 23-adjusting knob, 24-shaking button;3-steering gear, 31-output shaft;4-transmission unit, 41-driven disc, 42-guiding rod, 43-cam;5-briquetting sleeve, 51-pressing protrusion, 52-strip-shaped guide groove;6-spring;7-rotating sleeve, 71-arc-shaped guide groove, 72-receiving chamber, 73-internal thread, 74-medicine cartridge, 75-connecting cartridge;8-torsional spring;9-boosting unit, 91-motor, 92-screw rod, 93-injection block;10-double-cavity type medicine core. DETAILED DESCRIPTION

[0029] The utility model will be further described below in combination with specific implementation. Wherein, the drawings are only for example description, and the representation is only schematic diagram, and can not be understood as the limitation of the patent;In order to better illustrate the embodiment of the utility model, some components of the drawings can be omitted, enlarged or reduced, and the size of actual product is not represented;For those skilled in the art, it can be understood that some well-known structures in the drawings and their description can be omitted.

[0030] As Figures 1-7As shown, the utility model relates to a kind of protein medicine intelligent injectors, including the hollow structure gun-shaped casing 1, design into gun type, it is convenient for patient to hold and operate, the gun-shaped casing 1 is provided with operating unit 2, rudder 3, transmission unit 4, briquetting sleeve 5, spring 6, rotating sleeve 7, torsional spring 8 and boost unit 9, wherein: the gun-shaped casing 1 is provided with the limiting head 11 for disassembling double-cavity type medicine core 10 in the front end away from its handle 12, and limiting head 11 has the opening of double-cavity type medicine core 10 front end set injection needle (not drawn) penetration, the handle 12 inside its rear portion is provided with the cavity of placing rudder 3 and power supply (not drawn), power supply is as the power source for providing electrical energy to rudder 3, as conventional device, do not make too much repetition, and rudder 3 is responsible for converting electrical signal into mechanical movement, the axial sliding of briquetting sleeve 5 is driven by transmission unit 4 to realize the mixing and injection of protein medicine etc., i.e. rudder 3 is connected to briquetting sleeve 5 by transmission unit 4, to provide the rotary motion of rudder 3 to briquetting sleeve 5 and make it axial sliding;And briquetting sleeve 5 is also connected to gun-shaped casing 1 by spring 6, to make the axial sliding of briquetting sleeve 5 have reciprocating linear motion with transmission unit 4;Rudder 3 is arranged at the handle 12 of gun-shaped casing 1;Briquetting sleeve 5 is located above rudder 3;In this way, briquetting sleeve 5 reciprocating linear motion under the control of rudder 3, and briquetting sleeve 5 and gun-shaped casing 1 are connected by spring 6, ensure the reciprocating motion of briquetting sleeve 5 stable.

[0031] The transmission unit 4 is responsible for connecting the steering engine 3 and the pressing block sleeve 5, so as to convert the rotary motion of the steering engine 3 into the axial motion of the pressing block sleeve 5, which is composed of a driven disc 41, a guide rod 42 and a cam 43. The driven disc 41 is fixed on the bottom of the pressing block sleeve 5 through the guide rod 42, and the upper end of the guide rod 42 is fixedly connected with the pressing block sleeve 5, which is responsible for converting the rotary motion of the steering engine 3 into linear motion. The lower end of the guide rod 42 is arranged in the linear guide groove 14 of the gun-shaped shell 1. The linear guide groove 14 has a certain length, and its extension direction is consistent with the axial sliding direction of the pressing block sleeve 5, so as to adapt to the pressing block sleeve 5 with reciprocating linear motion and the guide rod 42 of the transmission unit 4 fixed on the pressing block sleeve 5, so as to ensure the smooth sliding of the pressing block sleeve 5 and avoid deflection. The output shaft 31 of the steering engine 3 is in transmission connection with the cam 43, and the cam 43 can act on the driven disc 41, that is, the cam 42 is in contact with the driven disc 41 in the process of rotating with the steering engine 3, which can convert the rotary motion of the steering engine 3 into the motion of the driven disc 41. In this way, when the steering engine 3 is started, the rotation of the output shaft 31 drives the cam 43 to rotate, and the shape of the cam 43 promotes the linear motion of the driven disc 41 under the guidance of the guide rod 42, and then drives the pressing block sleeve 5 to reciprocate with the spring 6. At the same time, by adjusting the rotary speed and angle of the steering engine 3, the motion of the pressing block sleeve 5 can be accurately controlled, so as to realize the rotary cooperation of the rotary sleeve 7 and the accurate control of injection. The design structure of the transmission unit 4 greatly improves the performance and stability of the protein drug intelligent injector. Through the accurate mechanical structure and motion conversion mode, the injector can realize efficient and accurate drug injection, which meets the needs of patients.

[0032] The rotating sleeve 7 is rotationally connected with the briquetting sleeve 5 at the corresponding end facing the briquetting sleeve 5. The rotational connection structure can adopt a bearing connection structure, or a ring groove and ring-shaped convex strip pair structure, and a torsional spring 8 is further connected between the two. The torsional spring 8 is designed to provide the necessary torsional resilience for the rotating sleeve 7. The torsional force provided by the torsional spring 8 cooperates with the reciprocating linear motion of the briquetting sleeve 5 to make the rotating sleeve 7 have positive and negative alternating rotation while following the back and forth movement of the briquetting sleeve 5. An arc-shaped guide groove 71 is formed on the outer wall of the end of the rotating sleeve 7 away from the briquetting sleeve 5, and a guide protrusion 13 is provided on the gun-shaped shell 1 to slidingly cooperate with the arc-shaped guide groove 71. That is, the gun-shaped shell 1 is provided with a threaded hole for installing the guide protrusion 13. The guide protrusion 13 is provided with a countersunk through hole, so that the guide protrusion 13 is fixed on the gun-shaped shell 1 by bolt connection. The guide protrusion 13 axially extends into the arc-shaped guide groove 71 of the rotating sleeve 7 and slidingly cooperates with it to guide and position, so as to cooperate with the torsional spring 8 to make the rotating sleeve 7 have positive and negative alternating rotation. The rotating sleeve 7 is used for installing the double-cavity medicine core 10. An axial through medicine cylinder 74 is provided on the rotating sleeve 7. An internal thread 73 is provided on the inner wall of one end of the medicine cylinder 74 close to the briquetting sleeve 5, and is rotationally fixed with the double-cavity medicine core 10. A connecting cylinder 75 concentrically sleeved with the medicine cylinder 74 is provided on the same side of the medicine cylinder 74, and an accommodating chamber 72 for accommodating the torsional spring 8 is formed between the medicine cylinder 74 and the connecting cylinder 75.

[0033] The boost unit 9 is arranged in the briquetting sleeve 5 and is used for pushing the double-cavity medicine core 10 installed in the rotating sleeve 7, and is responsible for pushing the mixed protein drug into the patient's body. The boost unit 9 is composed of a motor 91, a lead screw 92 and a push block 93. The motor 91 is a through motor, which is the output power of the boost unit 9 and is responsible for driving the rotation of the lead screw 92. The motor should be of a type that is efficient and responds quickly to ensure precise control during injection. The speed and direction of the motor 91 can be adjusted to meet the injection needs of different drugs. The output shaft of the motor is used to drive the lead 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 lead screw 92 should have good wear resistance and strength to withstand the pressure during the injection process. The push block 93 is arranged at the front end of the lead screw 92. The shape and size of the push block should be adapted to the double-cavity medicine core to ensure effective injection of the drug. The push block 93 is the component that directly contacts the medicine core. Its design should ensure that it can uniformly apply pressure and push the drug into the patient's body. When the user starts the injector through the operation unit, the motor starts to work and drives the lead screw to rotate. The rotation of the lead screw will be converted into linear motion of the push block, which moves forward and applies pressure to push the drug in the double-cavity medicine core out. Through the control of the motor, the movement speed and distance of the push block can be accurately adjusted to realize precise control of the injection dose.

[0034] The operation unit 2 can be controlled by the patient to control the functions of the injector, such as the working state of the rudder 3 and the boost unit 9, and the user can select the injection dose, speed and other parameters through the button or control screen; the operation unit 2 is composed of an injection button 21, a control screen 22, an adjusting knob 23 and a shaking button 24, the control screen 22 is a touch screen, and a programmer is integrated in the control screen 22, the injection button 21, the adjusting knob 23 and the shaking button 24 are electrically connected with the programmer, and the injection button 21 and the adjusting knob 23 are also electrically connected with the motor 91, and the shaking button 24 is also electrically connected with the rudder 3. In this way, the user sets the injection dose and speed through the adjusting knob. After pressing the injection button, the programmer receives the signal and starts the motor and the boost unit, and the injection process begins. If the user needs to shake the medicine, he can press the shaking button, and the programmer will instruct the rudder to rotate the rotating sleeve to ensure that the medicine is fully mixed. In addition, the programmer is a conventional device, such as using single-chip microcomputer automatic control technology, the control program can be realized by simple programming of the programmer, which belongs to the common knowledge in the art, and the utility model is mainly used to protect the mechanical device, so the control mode and the integrated circuit connection of the single-chip microcomputer are not explained in detail.

[0035] In the embodiment, the pressing sleeve 5 is provided with a pressing protrusion 51 and a strip-shaped guide groove 52, the pressing protrusion 51 is used to connect one end of the spring 6, and the gun-shaped shell 1 is also provided with another guide protrusion 13 which slides with the strip-shaped guide groove 52. The pressing sleeve 5 is a double-layer sleeve as a whole, the strip-shaped guide groove 52 is arranged on the outer wall of the pressing sleeve 5, and the strip-shaped guide groove 52 is matched with the guide protrusion 13, so as to better assist the reciprocating linear motion of the pressing sleeve 5; the pressing sleeve 5 is provided with the pressing protrusion 51 at the front end, and the pressing protrusion 51 is connected with the spring 6, so that the spring 6 can exert an elastic force on the pressing sleeve 5, and the other end of the spring 6 is fixedly connected on the gun-shaped shell 1.

[0036] The use method of the protein drug intelligent injector will be described in detail below, including the following steps:

[0037] Step one, remove the limiting head 11 at the front end of the gun-shaped shell 1, because the inner wall of the rotating sleeve 7 is provided with an inner thread 73 which is threadedly connected with the double-cavity type medicine core 10, the double-cavity type medicine core 10 loaded with protein drug lyophilized powder and matched solution is installed into the rotating sleeve 7 through the inner thread 73, and the injection needle is installed at the front end of the double-cavity type medicine core 10, and then the limiting head 11 is installed.

[0038] Step two, press the shake button 24, control screen 22 prompt shake state, boost unit 9 motor 91 start, the motor 91 positive transmission drive screw 92 rotation, and push the push block 93 to the set position, so that the double cavity type drug core 10 of solid-liquid isolation is removed, the protein drug freeze-dried powder in it and the matching solution begin to mix; then, the motor 91 is closed, and the steering gear 3 is started, the cam 43 is rotated in the set angle by the output shaft 31 of the steering gear 3, then the cam 43 pushes the driven disc 41 to move forward (or left) under the guidance of the guide rod 42 and the through straight guide groove 14 of the gun-shaped shell 1, and because the driven disc 41 and the pressure block sleeve 5 are fixedly connected through the guide rod 42, the pressure block sleeve 5 moves forward (or left) synchronously with the driven disc 41, and the spring 6 is stretched; then, the pressure block sleeve 5 pushes the rotary sleeve 7 to move forward (or left), and the rotary sleeve 7 rotates clockwise at the same time under the cooperation of the arc-shaped guide groove 71 and the guide protrusion 13 of the gun-shaped shell 1, at this time, the guide protrusion 13 moves from the rear end to the front end (or the right end to the left end) of the arc-shaped guide groove 71, as shown in Figure 3 , and the torsional spring 8 is twisted and stretched; then, when the guide rod 42 of the driven disc 41 reaches the maximum stroke at the front end (left end) relative to the straight guide groove 14, and the guide protrusion 13 also reaches the maximum stroke at the front end (left end) relative to the arc-shaped guide groove 71, that is, the convex end of the cam 43 is rotated, the spring 6 releases the energy stored in the stretching process, so that the pressure block sleeve 5 moves linearly backward (or right) and resets, and the torsional spring 8 synchronously releases the energy stored in the torsional stretching process, so that the rotary sleeve 7 rotates counterclockwise at the same time and resets; then, because the cam 43 rotates back and forth in the set angle, the above process with the steering gear 3 as an output power is repeated many times, and is coupled with the reciprocating linear motion of the pressure block sleeve 5 and the forward and reverse rotation of the rotary sleeve 7, until the protein drug in the double cavity type drug core 10 is shaken evenly.

[0039] Step three, rotate the adjustment knob 23, the control screen 22 prompts the adjustment state and displays the preset injection amount; then, rotate the adjustment knob 23 forward, the preset injection amount increases, and rotate the adjustment knob 23 backward, the preset injection amount decreases; at the same time, the program controller calculates the corresponding rotation angle of the motor 91 according to the preset injection amount;

[0040] Step four, take off the safety cap with needle, hand-held gun-shaped shell 1 rear handle 12, its front end of the limiting head 11 stable placed in the injection site skin, stable after pressing the injection button 21, control screen 22 prompt injection state, and rudder 3 drive cam 43 rotation to the maximum angle and keep, at this time the block set 5 to stop rotating sleeve 7 to the left a and to the maximum stroke, namely the guide boss 13 stop in the front end of the arc-shaped guide slot 71, and the rotating sleeve 7 front end reaches the limiting head 11, double cavity type drug core 10 needle is inserted into the injection site skin, then, the program control motor 91 forward rotation, and the motor 91 drive screw 92 advance, so that the push block 93 press out the corresponding dose of drug according to the preset injection volume, finally, control motor 91 and rudder 3 rotation, to reset the rotating sleeve 7, block set 5 and boost unit 9, complete the injection of drug.

[0041] Finally, it is pointed out that the above examples are used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, which should be covered by the scope of the claims of the present application.

Claims

1. A protein drug smart injector comprising a gun type case (1), characterized in that, The gun-shaped shell (1) is provided with an operation unit (2), a rudder (3), a transmission unit (4), a pressing block sleeve (5), a spring (6), a rotating sleeve (7), a torsional spring (8) and a boosting unit (9), wherein: The rudder (3) is connected to the pressing block sleeve (5) through the transmission unit (4) to provide the rudder (3) with a rotating motion to the pressing block sleeve (5) and make it axially slide; and the pressing block sleeve (5) is also connected to the gun-shaped shell (1) through the spring (6) to cooperate with the transmission unit (4) so that the axial sliding of the pressing block sleeve (5) has a reciprocating linear motion; the rudder (3) is arranged at a handle (12) of the gun-shaped shell (1); the pressing block sleeve (5) is located above the rudder (3); The rotating sleeve (7) is rotationally connected with the pressing block sleeve (5) at a corresponding end facing the pressing block sleeve (5), and the torsional spring (8) is further connected therebetween; the torsional force provided by the torsional spring (8) cooperates with the reciprocating linear motion of the pressing block sleeve (5) to drive the rotating sleeve (7) to alternately rotate in opposite directions; the rotating sleeve (7) is provided with an arc-shaped guide groove (71) on an outer wall of a far end away from the pressing block sleeve (5), and the gun-shaped shell (1) is provided with a guide protrusion (13) which is in sliding cooperation with the arc-shaped guide groove (71); The boosting unit (9) is arranged in the pressing block sleeve (5) and is used to push a double-cavity type medicine core (10) installed in the rotating sleeve (7); The rudder (3) and the boosting unit (9) are controlled by the operation unit (2).

2. The protein drug intelligent syringe of claim 1, wherein, The gun-shaped shell (1) is provided with a limiting head (11) at a front end away from the handle (12) for disassembling the double-cavity type medicine core (10).

3. The protein drug intelligent syringe of claim 1, wherein, 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 pressing block sleeve (5) through the guide rod (42), the upper end of the guide rod (42) is fixedly connected with the pressing block sleeve (5), the lower end of the guide rod (42) penetrates through a linear guide groove (14) of the gun-shaped shell (1), the extending direction of the linear guide groove (14) is consistent with the axial sliding direction of the pressing block sleeve (5); the output shaft (31) of the rudder (3) is in transmission connection with the cam (43), and the cam (43) can act on the driven disc (41).

4. The protein drug intelligent syringe of claim 1, wherein, The pressing block sleeve (5) is provided with a pressing protrusion (51) and a strip-shaped guide groove (52); the pressing protrusion (51) is used to connect one end of the spring (6); the gun-shaped shell (1) is further provided with another guide protrusion (13) which is in sliding cooperation with the strip-shaped guide groove (52).

5. The protein drug intelligent syringe of claim 1, wherein, The rotating sleeve (7) is provided with an axial through medicine cylinder (74), which is provided with an internal thread (73) fixedly rotating with the double-cavity medicine core (10) on the inner wall of one end close to the briquetting sleeve (5); the rotating sleeve (7) is provided with a concentrically sleeved connecting cylinder (75) on the same side of the medicine cylinder (74), and an accommodating chamber (72) for accommodating the torsion spring (8) is formed between the medicine cylinder (74) and the connecting cylinder (75).

6. The protein drug intelligent syringe according to any one of claims 1-5, wherein, The boosting unit (9) is composed of a motor (91), a lead screw (92) and a push injection block (93), the motor (91) is used for driving the lead screw (92), and the lead screw (92) is provided with the push injection block (93) at the front end facing the double-cavity medicine core (10).

7. The protein drug intelligent syringe according to claim 6, wherein, The operation unit is composed of an injection button (21), a control screen (22), an adjusting knob (23) and a shaking button (24), the control screen (22) is integrated with a program controller, the injection button (21), the adjusting knob (23) and the shaking button (24) are electrically connected with the program controller, the injection button (21) and the adjusting knob (23) are also electrically connected with the motor (91), and the shaking button (24) is also electrically connected with the rudder (3).

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