Pen type injector and injection system
By incorporating the motor drive module and detection module of the pen syringe, the problem of insufficient precision in existing syringes has been solved, enabling precise control of injection volume and depth, and improving the safety and ease of operation of the syringe.
Patent Information
- Application Number
- CN202610352189.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-20
- Publication Date
- 2026-05-15
AI Technical Summary
Existing syringes are difficult to inject with precise doses of 0.005 to 0.01 ml, and the injection depth is not accurately controlled, which causes inconvenience to medical staff.
The pen-type syringe includes a housing, an injection module, a first drive module, and a second drive module. It uses a motor to drive the extension depth of the injection needle and the movement of the piston. Combined with a detection module and a control module, it can achieve precise control of the injection volume and depth.
It achieves precise control of injection volume and depth, avoiding dosage deviations caused by uneven force or speed fluctuations, and improving the safety and accuracy of injection.
Smart Images
Figure CN122031833A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to a pen-type syringe and injection system. Background Technology
[0002] Currently, some medications have strict dosage requirements; injecting too much may cause side effects, while injecting too little may not achieve the desired effect. Existing syringes consist of a needle and a piston rod, with the piston rod embedded within the needle and sliding within it. Pushing the piston rod causes it to slide within the needle, injecting the medication into the patient.
[0003] When medical staff use syringes to administer medications to patients, especially those requiring precise dosage control, traditional syringes rely on manual operation of the plunger and visual judgment to determine the injection volume. This method cannot achieve accurate dosages within the 0.005–0.01 ml range, potentially resulting in dosages exceeding or falling short of the prescribed amount. Traditional syringes also cannot control the needle depth to within 1 mm. Furthermore, using conventional syringes of appropriate specifications, particularly when drawing large amounts of medication, results in excessive syringe length and a significant distance between the plunger and needle tip, causing considerable inconvenience for medical personnel in holding the syringe and controlling the injection precisely. Summary of the Invention
[0004] The purpose of this invention is to provide a pen-type syringe and injection system to solve the problems existing in the prior art, thereby improving injection accuracy and work efficiency.
[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a pen-type syringe, comprising a housing, an injection module, a first driving module, and a second driving module. The injection module, the second driving module, and the first driving module are sequentially disposed within the housing along a first direction. The front end of the housing has a needle outlet for the injection module to extend out. The injection module is movable along the first direction and includes a reservoir, a piston movably disposed within the reservoir, and an injection needle communicating with the reservoir. The first driving module drives the second driving module and the injection module to move along the first direction, causing the injection needle to extend out of the needle outlet and pierce the skin. The second driving module is connected to the piston and drives the piston to move along the first direction to eject the injection liquid from the reservoir.
[0006] In some embodiments, a support frame is also included, the second drive module is fixedly mounted on the support frame, the first drive module is fixedly mounted inside the housing, the output component of the first drive module is fixedly connected to the support frame, and the first drive module drives the support frame to move along a first direction, thereby causing the second drive module and the injection module to move synchronously.
[0007] In some embodiments, the first drive module includes a first motor, a lead screw, and a first moving block. The output end of the first motor is fixedly connected to the lead screw, the lead screw is threadedly connected to the first moving block, the first moving block is fixedly connected to the support frame, and the support frame is slidably connected to the housing along the first direction. The first motor can drive the lead screw to rotate, thereby driving the support frame to move along the first direction.
[0008] In some embodiments, the second drive module includes a second motor, a push rod, and a guide member. The output end of the second motor is fixedly connected to the push rod, and the second motor can drive the push rod to move along the first direction, thereby squeezing the piston and pushing out the injection liquid in the reservoir. The guide member is fixedly connected to the support frame, and the guide member is sleeved on the push rod and guides the movement of the push rod in the first direction.
[0009] In some embodiments, a detection module is also included, which is disposed within the housing. The detection module is used to identify whether the injection module is being used for the first time. The housing includes a first housing and a second housing, which are detachably connected. The injection module is detachably installed within the housing. The front end of the first housing has a needle outlet for the injection module to extend out.
[0010] In some embodiments, the surface of the liquid storage cylinder is provided with identity information. The detection module can read and store the identity information and compare the currently read identity information with the stored identity information. If the current identity information is not in the stored information, the liquid storage cylinder is determined to be used for the first time; if the current identity information is in the stored information, the liquid storage cylinder is determined to be used for the second time.
[0011] In some embodiments, a control module is also included, which is disposed on the housing and is signal-connected to the first drive module and the second drive module respectively, and is capable of controlling the injection depth and injection volume of the pen syringe.
[0012] In some embodiments, the housing has a diameter of 13-16 mm and a length of 150-180 mm.
[0013] The present invention also provides an injection system, including a support platform, a control console, and a pen-type injector as described in any one of the above. The control console is disposed on the support platform and is signal-connected to the first drive module and the second drive module, and is capable of controlling the injection depth and injection volume of the pen-type injector.
[0014] In some embodiments, the console is provided with a plurality of knobs, wherein at least one of the knobs is connected to the first drive module for adjusting the injection depth, and at least one of the knobs is connected to the second drive module for adjusting the injection volume.
[0015] The present invention achieves the following technical effects compared to the prior art: This invention employs a first driving module and a second driving module. The first driving module drives the injection module and the second driving module to move along the first direction of the housing, precisely controlling the depth and speed at which the injection needle extends from the needle outlet. It allows for flexible adjustment of needle parameters based on the injection site and skin thickness, ensuring precise and controllable needle insertion depth. This avoids damage to blood vessels due to excessive insertion or leakage of medication due to insufficient insertion, laying the foundation for accurate subsequent medication delivery. The second driving module is independently connected to the piston and drives the piston to move along the first direction. It precisely controls the distance and speed of piston movement according to the required medication dosage, achieving accurate control of the medication delivery volume and eliminating dosage deviations caused by uneven force or speed fluctuations in manual or single-drive injections. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a pen-type syringe in one embodiment of Example 1; Figure 2 This is an exploded view of a pen-type syringe in one embodiment of Example 1; Figure 3 This is a schematic diagram of the injection system in one embodiment of Example 2.
[0018] Wherein: 1-Control console; 2-Pen syringe; 3-Knob; 4-Support platform; 5-Control module; 6-Housing; 61-First housing; 62-Second housing; 8-Injection needle; 9-Reservoir; 10-Piston; 12-Main board protection; 13-Push rod; 14-Guide; 15-Second motor; 16-Support frame; 17-First moving block; 18-Lead screw; 19-First motor; 21-First motor bracket; 22-Main board; 24-Housing decorative strip; 25-Keycap; 30-Second drive module; 40-First drive module; 50-Injection module. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] Example 1 This invention provides a pen-type syringe 2, such as Figure 1-3As shown, the device includes a housing 6, an injection module 50, a first drive module 40, and a second drive module 30. The injection module 50, the second drive module 30, and the first drive module 40 are sequentially disposed within the housing 6 along a first direction. The front end of the housing 6 has a needle outlet for the injection module 50 to extend from it. The injection module 50 is movable along the first direction and includes a reservoir 9, a piston 10 movably disposed within the reservoir 9, and an injection needle 8 communicating with the reservoir 9. The first drive module 40 drives the second drive module 30 and the injection module 50 to move along the first direction, causing the injection needle 8 to extend from the needle outlet and pierce the skin. The second drive module 30 is connected to the piston 10 and drives the piston 10 to move along the first direction to dissipate the contents of the reservoir 9. The injection solution is ejected. In this embodiment, a first drive module 40 and a second drive module 30 are set up. The first drive module 40 is used to drive the injection module 50 and the second drive module 30 to move along the first direction of the housing 6, and precisely control the depth and speed at which the injection needle 8 extends out of the needle outlet. The needle parameters can be flexibly adjusted according to the injection site and skin thickness to ensure that the needle insertion depth is accurate and controllable, avoiding damage to blood vessels due to excessive insertion or leakage of the drug solution due to insufficient insertion, thus laying the foundation for subsequent accurate drug delivery. The second drive module 30 is independently connected to the piston 10 and is used to drive the piston 10 to move along the first direction. It can precisely control the distance and speed of the piston 10 to move according to the drug dosage requirements, so as to achieve precise control of the amount of drug solution ejected and eliminate the dosage deviation caused by uneven force and speed fluctuations in manual injection or single-drive injection.
[0022] In some embodiments of this example, the pen injector 2 further includes a support frame 16, a second drive module 30 fixedly mounted on the support frame 16, a first drive module 40 fixedly mounted inside the housing 6, and an output component of the first drive module 40 fixedly connected to the support frame 16. The first drive module 40 drives the support frame 16 to move in a first direction, thereby driving the second drive module 30 and the injection module 50 to move synchronously. The first drive module 40 is fixedly connected to the first motor bracket 21, and the second drive module 30 is fixedly mounted on the support frame 16. The first drive module 40 directly drives the support frame 16, integrating the first drive module 40, the second drive module 30, and the injection module 50 into a single motion unit. This reduces scattered parts, shrinks the overall size, and miniaturizes the pen injector 2, making it easier to use.
[0023] In some embodiments of this example, the first drive module 40 includes a first motor 19, a lead screw 18, and a first moving block 17. The output end of the first motor 19 is fixedly connected to the lead screw 18, the lead screw 18 is threadedly connected to the first moving block 17, and the first moving block 17 is fixedly connected to the support frame 16. The support frame 16 is slidably connected to the housing 6 along a first direction. The first motor 19 can drive the lead screw 18 to rotate, thereby driving the support frame 16 to move along the first direction. The drive structure of the first motor 19, the lead screw 18, and the first moving block 17 can accurately convert the rotational motion of the first motor 19 into linear motion, which has the characteristics of smooth transmission, high positioning accuracy, and good controllability. At the same time, the first drive module 40 has a compact structure, occupies little space, and has high reliability, which is conducive to realizing the miniaturization design and stable and reliable linear drive control of the pen syringe 2.
[0024] In some embodiments of this example, the second drive module 30 includes a second motor 15, a push rod 13, and a guide member 14. The output end of the second motor 15 is fixedly connected to the push rod 13. The guide member 14 is sleeved on the push rod 13 and fixedly connected to the support frame 16. The second motor 15 can drive the push rod 13 to move in a first direction, thereby squeezing the piston 10 and pushing out the injection liquid in the liquid storage cylinder 9. The guide member 14 is fixedly connected to the support frame 16 and is sleeved on the outside of the push rod 13, guiding the movement of the push rod 13 in the first direction. The system employs a structure that combines a second motor 15, a push rod 13, and a guide component 14. The second motor 15 drives the push rod 13 to extend and retract along a first direction to compress the piston 10 and eject the injection liquid. The guide component 14 constrains and guides the movement of the push rod 13, ensuring smooth movement, high coaxiality, and no off-center load. This effectively avoids jamming and shaking, improving the stability of the injection force and the uniformity of the liquid output. At the same time, the second drive module 30 has a compact structure and reliable installation, which helps to improve the injection accuracy and reliability of the pen syringe 2.
[0025] In some embodiments of this example, the pen syringe 2 further includes a detection module, which is disposed within the housing 6. The detection module is used to identify whether the injection module 50 is being used for the first time. The housing 6 includes a first housing 61 and a second housing 62, which are detachably connected. The injection module 50 is detachably installed within the housing 6. The front end of the first housing 61 has a needle outlet for the injection module 50 to extend out. By setting the detection module within the housing 6, it is possible to effectively identify whether the injection module 50 is being used for the first time, avoiding repeated use of the injection module 50 and improving injection safety and hygiene. The housing 6 adopts a separate arrangement of the first housing 61 and the second housing 62, which facilitates the assembly, layout, and maintenance of internal components. At the same time, the needle outlet at the front end of the first housing 61 can guide and limit the extension of the injection module 50, ensuring stable and accurate needle delivery. The injection module 50 is detachably installed within the housing 6, which allows for the reuse of the pen syringe 2 body and the single-use of the injection module 50. This ensures safe and reliable use while simplifying replacement operations and reducing usage costs.
[0026] In some embodiments of this example, the surface of the liquid reservoir 9 is provided with identification information. The detection module can read and store the identification information and compare the currently read identification information with the stored identification information. If the current identification information is not in the stored information, the liquid reservoir 9 is determined to be used for the first time; if the current identification information is in the stored information, the liquid reservoir 9 is determined to be used for the second time. By setting identification information on the surface of the liquid reservoir 9, and having the detection module read, store, and compare the identification information, each liquid reservoir 9 can be uniquely identified, accurately determining whether it is used for the first time. This fundamentally avoids the reuse of the liquid reservoir 9, effectively reduces the risk of cross-infection, and improves the safety and reliability of injection use. At the same time, the identification information is traceable, which facilitates the management of the liquid, the recording of usage, and the data-driven control, further improving the intelligence and standardization level of the pen syringe 2.
[0027] In some embodiments of this example, the pen injector 2 further includes a control module 5. The control module 5 is mounted on the housing 6 and is connected to the first drive module 40 and the second drive module 30 via signals. It is capable of controlling the injection depth and injection volume of the pen injector 2. The control module 5 includes a main board 22, a main board protective component 12, a housing decorative strip 24, and a keycap 25. By installing the control module 5 on the pen injector 2, which is connected to the first drive module 40 and the second drive module 30 via signals, the injection depth and injection volume can be precisely controlled, improving injection accuracy and medication safety, and achieving automated and intelligent injection. The control module 5 utilizes the main board 22... The combination structure of the motherboard protector 12, the outer shell decorative strip 24, and the keycap 25 is as follows: the motherboard 22 is located inside the control module 5 and is used to realize circuit control and signal processing; the motherboard protector 12 is located below the motherboard 22 to protect the motherboard 22; the outer shell decorative strip 24 is installed on the outer surface of the control module 5 to realize appearance decoration and internal component limit; the keycap 25 passes through the outer shell decorative strip 24 and cooperates with the motherboard, and triggers the motherboard 22 to complete the input of operation commands by pressing. This design can effectively protect the motherboard 22, ensure circuit stability and reliability, optimize appearance assembly and operation feel, and improve the overall structure, assembly convenience and user experience.
[0028] In some embodiments of this example, the diameter of the shell 6 is 13-16mm and the length is 150-180mm; by setting the diameter of the shell 6 to 13-16mm and the length to 150-180mm, the overall shape and size conform to ergonomic grip habits, making it comfortable to hold and stable to operate. At the same time, its slim and compact shape makes it easy to carry and store.
[0029] Example 2 This embodiment also provides an injection system, including a support platform 4, a control console 1, and a pen-type injector 2 as described in Embodiment 1. The control console 1 is mounted on the support platform 4 and is signal-connected to the first drive module 40 and the second drive module 30, and can control the injection depth and injection volume of the pen-type injector 2. In this embodiment, by setting the first drive module 40 and the second drive module 30, the first drive module 40 is used to drive the injection module 50 and the second drive module 30 to move along the first direction of the housing 6, accurately controlling the depth and speed at which the injection needle 8 extends out of the needle outlet. The needle parameters can be flexibly adjusted according to the injection site and skin thickness to ensure that the needle insertion depth is accurate and controllable, avoiding damage to blood vessels due to excessive insertion or leakage of drug solution due to insufficient insertion, thus laying the foundation for subsequent accurate drug delivery. The second drive module 30 is independently connected to the piston 10 and is used to drive the piston 10 to move along the first direction. It can accurately control the distance and speed of the piston 10 movement according to the drug dosage requirements, realizing precise control of the drug delivery volume and eliminating dosage deviations caused by uneven force and speed fluctuations in manual injection or single-drive injection.
[0030] In some embodiments of this example, the control panel 1 is provided with several knobs 3, which are connected to the pen syringe 2. At least one knob 3 is connected to the first drive module 40 for adjusting the injection depth, and at least one knob 3 is connected to the second drive module 30 for adjusting the injection volume. The injection depth and injection volume can be adjusted independently through the knobs 3. The operation is intuitive, the adjustment is convenient, and the response is rapid. This allows medical staff to adjust the injection parameters in real time and accurately, improving the flexibility of operation and the accuracy of control. At the same time, the knobs 3 have high reliability and low accidental touch rate, which helps to improve the stability and safety of the injection process.
[0031] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A pen-type syringe, characterized in that: The device includes a housing, an injection module, a first driving module, and a second driving module. The injection module, the second driving module, and the first driving module are sequentially disposed inside the housing along a first direction of the housing. The front end of the housing has a needle outlet for the injection module to extend out. The injection module is movable along the first direction. The injection module includes a liquid reservoir, a piston movably disposed in the liquid reservoir, and an injection needle communicating with the liquid reservoir. The first driving module is used to drive the second driving module and the injection module to move along the first direction, so that the injection needle extends out of the needle outlet and pierces the skin; The second drive module is connected to the piston and is used to drive the piston to move along the first direction to push out the injection liquid in the reservoir.
2. The pen-type syringe according to claim 1, characterized in that: It also includes a support frame, the second drive module is fixedly mounted on the support frame, the first drive module is fixedly mounted inside the housing, the output component of the first drive module is fixedly connected to the support frame, and the first drive module drives the support frame to move along a first direction, thereby driving the second drive module and the injection module to move synchronously.
3. The pen-type syringe according to claim 2, characterized in that: The first drive module includes a first motor, a lead screw, and a first moving block. The output end of the first motor is fixedly connected to the lead screw, the lead screw is threadedly connected to the first moving block, the first moving block is fixedly connected to the support frame, and the support frame is slidably connected to the housing along the first direction. The first motor can drive the lead screw to rotate, thereby driving the support frame to move along the first direction.
4. The pen-type syringe according to claim 3, characterized in that: The second drive module includes a second motor, a push rod, and a guide. The output end of the second motor is fixedly connected to the push rod. The second motor can drive the push rod to move along the first direction, thereby squeezing the piston and pushing out the injection liquid in the reservoir. The guide is fixedly connected to the support frame. The guide is sleeved on the push rod and guides the movement of the push rod in the first direction.
5. The pen-type syringe according to claim 4, characterized in that: It also includes a detection module, which is disposed inside the housing. The detection module is used to identify whether the injection module is being used for the first time. The housing includes a first housing and a second housing, which are detachably connected. The injection module is detachably installed inside the housing. The front end of the first housing has a needle outlet for the injection module to extend out.
6. The pen-type syringe according to claim 5, characterized in that: The surface of the liquid storage cylinder is provided with identification information. The detection module can read and store the identification information and compare the currently read identification information with the stored identification information. If the current identification information is not in the stored information, the liquid storage cylinder is determined to be used for the first time; if the current identification information is in the stored information, the liquid storage cylinder is determined to be used for the second time.
7. The pen-type syringe according to claim 4, characterized in that: It also includes a control module, which is disposed on the housing. The control module is connected to the first drive module and the second drive module respectively, and is capable of controlling the injection depth and injection volume of the pen syringe.
8. The pen-type syringe according to claim 1, characterized in that: The shell has a diameter of 13-16mm and a length of 150-180mm.
9. An injection system, characterized in that: The device includes a support platform, a control console, and a pen-type injector as described in any one of claims 1-8. The control console is disposed on the support platform and is signal-connected to the first drive module and the second drive module, and is capable of controlling the injection depth and injection volume of the pen-type injector.
10. The injection system according to claim 9, characterized in that: The control panel is equipped with several knobs, at least one of which is connected to the first drive module for adjusting the injection depth, and at least one of the knobs is connected to the second drive module for adjusting the injection volume.