An injection device containing a hidden needle assembly

Abstract

The present application relates to the technical field of medical devices, and provides an injection device containing a hidden needle assembly, which comprises a body, a hidden needle assembly and an injection assembly; the body is formed with an injection outlet; the hidden needle assembly comprises a hidden needle sleeve and a position sensor; the hidden needle sleeve is slidably connected to the injection outlet and is adapted to be switched between a first position and a second position; in the first position, the hidden needle sleeve extends out of the injection outlet; in the second position, the hidden needle sleeve is retracted into the injection outlet; the position sensor is arranged at the injection outlet and is used for detecting the position of the hidden needle sleeve; the injection assembly is arranged in the body and is electrically connected with the position sensor. The injection device can hide the injection needle, and the injection button is omitted; the control of injection can be realized without the injection button; the injection device has the characteristics of simple structure, convenient use, high safety performance and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an injection device containing a hidden needle assembly. BACKGROUND

[0002] Most of the existing injection devices are electronic injection pens, which are provided with an injection assembly and a cartridge bottle. The injection needle of the cartridge bottle is located outside the injection outlet of the electronic injection pen, and the injection assembly pushes the rubber plug of the cartridge bottle to perform injection.

[0003] For special groups such as the elderly, the disabled or children, not only do they need to use the electronic injection pen with the injection needle, but also need to control the injection button of the electronic injection pen, which is extremely inconvenient to use. Long-term and frequent control of the injection button can cause corrosion and short circuit due to loosening and water ingress, which poses a safety hazard to injection. SUMMARY

[0004] The present application provides an injection device containing a hidden needle assembly, which can hide the injection needle and eliminate the injection button. The control of injection can be realized without the injection button, and the injection device has the characteristics of simple structure, convenient use, high safety performance, etc.

[0005] The present application provides an injection device containing a hidden needle assembly, which comprises:

[0006] a machine body formed with an injection outlet;

[0007] a hidden needle assembly, comprising: a hidden needle sleeve and a position sensor, the hidden needle sleeve is slidably connected to the injection outlet and is adapted to switch between a first position and a second position, in the first position, the hidden needle sleeve extends out of the injection outlet, in the second position, the hidden needle sleeve is retracted into the injection outlet; the position sensor is arranged at the injection outlet and is used for detecting the position of the hidden needle sleeve;

[0008] an injection assembly arranged in the machine body and electrically connected with the position sensor.

[0009] According to the injection device containing a hidden needle assembly provided by the present application, the hidden needle assembly further comprises:

[0010] a guide sleeve arranged in the machine body along the extension and retraction direction of the hidden needle sleeve;

[0011] a resilient member arranged in the guide sleeve;

[0012] the first end of the hidden needle sleeve is connected with the resilient member.

[0013] According to the injection device with the hidden needle assembly provided by the application, the first end of the hidden needle sleeve is formed with a guide column arranged in the extension direction, the guide column is slidably arranged in the guide sleeve and connected with the elastic member.

[0014] According to the injection device with the hidden needle assembly provided by the application, the hidden needle assembly further comprises:

[0015] The toggle key is arranged on the body and connected with the hidden needle sleeve, and is used for driving the hidden needle sleeve to extend or retract.

[0016] According to the injection device with the hidden needle assembly provided by the application, the end surface of the injection outlet is formed with a first flange, the first end of the hidden needle sleeve is formed with a second flange, in the first position, the second flange abuts on the first flange, and in the second position, the second flange is separated from the first flange.

[0017] According to the injection device with the hidden needle assembly provided by the application, the first flange is formed with a containing groove, the position sensor is a Hall switch, the Hall switch is arranged in the containing groove, and the second end of the hidden needle sleeve is provided with a first magnetic member matched with the Hall switch.

[0018] According to the injection device with the hidden needle assembly provided by the application, the injection assembly comprises:

[0019] The driving assembly is used for pushing the rubber plug of the cartridge bottle in the body.

[0020] The controller is electrically connected with the driving assembly and the position sensor respectively.

[0021] According to the injection device with the hidden needle assembly provided by the application, the driving assembly comprises:

[0022] The bracket;

[0023] The driving motor is arranged on the bracket and electrically connected with the controller.

[0024] The lead screw is connected with the driving motor in transmission, and the driving motor is adapted to drive the lead screw to rotate.

[0025] The lead screw sleeve is threadedly sleeved on the outer wall of the lead screw.

[0026] The limiting seat is arranged on the bracket, and the limiting seat is formed with a limiting groove matched with the lead screw sleeve, and is used for enabling the lead screw sleeve to move linearly to push the rubber plug of the cartridge bottle.

[0027] According to the injection device with the hidden needle assembly provided by the application, the body comprises:

[0028] A main control bin, the injection assembly is arranged in the main control bin;

[0029] A medicine bin, the needle-protected assembly is arranged in the medicine bin, the medicine bin is formed with the injection outlet, a cartridge is arranged in the medicine bin, the injection needle of the cartridge is located outside the injection outlet and is adapted to be shielded by the needle-protected sleeve;

[0030] And the main control bin and the medicine bin are detachably connected.

[0031] According to the injection device with the needle-protected assembly provided by the application, one of the connection end of the main control bin and the connection end of the medicine bin is provided with a second magnetic element, and the other is provided with a magnetic induction element matched with the second magnetic element, for controlling the on-off of the injection device.

[0032] The injection device with the needle-protected assembly provided by the application, the needle-protected sleeve is slidably connected to the injection outlet of the body and is adapted to be switched between the first position and the second position, in the first position, the needle-protected sleeve extends out of the injection outlet and can shield the injection needle outside the injection outlet, hiding the injection needle to ensure safety, in the second position, the needle-protected sleeve is retracted into the injection outlet, for injection; the position sensor is arranged at the injection outlet, which can detect the position of the needle-protected sleeve; the injection assembly is arranged in the body and is electrically connected with the position sensor, which can perform injection based on the position information of the needle-protected sleeve detected by the position sensor. Therefore, the injection needle can be hidden, and the injection key is omitted, the control of injection can be realized without the injection key, and the injection device has the characteristics of simple structure, convenient use, high safety performance and the like.

[0033] In addition, one of the connection end of the main control bin and the connection end of the medicine bin is provided with a second magnetic element, and the other is provided with a magnetic induction element matched with the second magnetic element, the magnetic induction element can realize the on-off of the injection device by inducting the magnetism of the second magnetic element.

[0034] The application further provides a control method of the injection device with the needle-protected assembly, including an automatic start-up injection process or / and an automatic shutdown process after injection.

[0035] Additional aspects and advantages of the application will be made apparent by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to make the technical solutions in the present application or the related art clearer, the attached drawings needed to be used in the embodiments or the related description will be briefly introduced. Obviously, the attached drawings in the following description are some embodiments of the present application, and other attached drawings can be obtained by those skilled in the art without any creative effort based on these attached drawings.

[0037] Figure 1 is a structural schematic view of the injection device with the hidden needle assembly provided by the present application;

[0038] Figure 2 is a structural schematic view of the hidden needle assembly provided by the present application;

[0039] Figure 3 is a structural schematic view of the injection device with the hidden needle assembly provided by the present application;

[0040] Figure 4 is a sectional view of A-A of Figure 3

[0041] Figure 5 is an enlarged view of B of Figure 4

[0042] Figure 6 is an enlarged view of C of Figure 4

[0043] Reference signs:

[0044] 1: machine body; 101: main control bin; 102: medicine bin;

[0045] 2: cassette bottle; 3: hidden needle sleeve; 4: position sensor; 5: guide sleeve;

[0046] 6: elastic member; 7: guide column; 8: push key; 9: sliding groove; 10: connecting part;

[0047] 11: first flange; 12: second flange; 13: accommodating groove; 14: first magnetic member;

[0048] 15: controller; 16: support; 17: driving motor; 18: lead screw; 19: lead screw sleeve;

[0049] 20: limiting seat; 21: nut; 22: display screen; 23: end cover; 24: needle cap;

[0050] 25: second magnetic member; 26: magnetic induction element; 27: recessed part; 28: observation window. DETAILED DESCRIPTION

[0051] ​​​In order to make the objects, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application with reference to the drawings in the present application. Obviously, the described embodiments are only a part of embodiments of the present application, but not all embodiments of the present application. Based upon the embodiments in the present application, all other embodiments obtained by those ordinarily skilled in the art without creative efforts should fall into the scope of the present application.

[0052] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0053] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0056] The following will be described in conjunction with Figures 1-6 The injection device with a hidden needle assembly of the present application is described.

[0057] According to one embodiment of the present application, referring to Figures 1-6 The injection device with a hidden needle assembly provided by the present application mainly comprises: a body 1, a hidden needle assembly and an injection assembly.

[0058] Generally, the bottom end of the body 1 is formed with an injection outlet, and a cassette bottle 2 is detachably assembled in the body 1, the cassette bottle 2 is mainly used for containing growth hormone, insulin and other drugs, and the injection needle of the cassette bottle 2 extends to the outside of the injection outlet of the body 1, so as to facilitate injection of the drug.

[0059] Referring to Figure 2 , Figure 4 and Figure 5 The hidden needle assembly mainly comprises: a hidden needle sleeve 3 and a position sensor 4, the hidden needle sleeve 3 is slidably connected to the injection outlet of the body 1, the hidden needle sleeve 3 can be extended and retracted along the length direction of the body 1 at the injection outlet, and the hidden needle sleeve 3 is adapted to be switched between a first position and a second position, at the first position, the hidden needle sleeve 3 extends out of the injection outlet and can shield the injection needle outside the injection outlet, hiding the injection needle to ensure safety, at the second position, the hidden needle sleeve 3 is retracted into the injection outlet to facilitate injection.

[0060] It can be understood that the first position of the present application is the initial state of non-injection, so that when not injecting, the hidden needle sleeve 3 can shield the injection needle outside the injection outlet, ensuring safety; the second position is the injection state, during the injection process, the hidden needle sleeve 3 always abuts against the skin, the hidden needle sleeve 3 is retracted into the injection outlet, at this time, the injection needle is still shielded and hidden, so that the injection needle cannot be seen when using, eliminating the fear of the injection needle to the user, thereby improving the user experience.

[0061] The position sensor 4 is arranged at the injection outlet of the body 1 and is used to detect the position of the needle sleeve 3; the injection assembly is arranged in the body 1 and is electrically connected with the position sensor 4, and the injection assembly can control the injection process based on the position information of the needle sleeve 3 detected by the position sensor 4. Specifically, when the position sensor 4 detects that the needle sleeve 3 is in the first position, the position sensor 4 sends a closing signal to the injection assembly, and the injection assembly is in a closed state and does not perform injection; when the position sensor 4 detects that the needle sleeve 3 is in the second position, the position sensor 4 sends an opening signal to the injection assembly, and the injection assembly is in an open state and performs injection.

[0062] Therefore, the injection device with the needle sleeve assembly provided by the embodiment of the present application can hide the injection needle, ensure safety, eliminate fear, and improve the user experience by using the needle sleeve 3, the position sensor 4, and the injection assembly in combination. In addition, the injection button in the related art can be omitted, and the injection function can be controlled by the injection button, and the injection device has the characteristics of simple structure, convenient use, high safety, and the like.

[0063] According to an embodiment of the present application, as shown in Figure 2 and Figure 4 , the needle sleeve assembly further comprises a guide sleeve 5 and an elastic member 6; the guide sleeve 5 is arranged in the body 1 along the extension direction of the needle sleeve 3, that is, the guide sleeve 5 is arranged along the length direction of the body 1; the elastic member 6 is arranged in the guide sleeve 5, and the guide sleeve 5 can guide the extension and retraction movement of the elastic member 6; the first end (the upper end in this example) of the needle sleeve 3 is connected with the elastic member 6, and the needle sleeve 3 can realize extension and retraction movement through the elastic member 6.

[0064] The specific number of the guide sleeve 5 is not particularly limited in the present application, and in this example, the guide sleeve 5 is arranged as two, and the two guide sleeves 5 are symmetrically arranged with the vertical central axis of the needle sleeve 3 as the axis of symmetry, which can improve the sliding stability of the needle sleeve 3.

[0065] In addition, the specific type of the elastic member 6 is not particularly limited in the present application, as long as the elastic member 6 can make the needle sleeve 3 realize extension and retraction movement. In this example, the elastic member 6 is a spring.

[0066] According to an embodiment of the present application, as shown in Figure 2 and Figure 4 , the first end of the needle sleeve 3 is formed with a guide column 7 arranged along the extension direction, the guide column 7 is slidably arranged in the guide sleeve 5, and the guide column 7 is connected with the elastic member 6. The needle sleeve 3 of the embodiment of the present application can further improve the sliding stability of the needle sleeve 3 by arranging the guide column 7.

[0067] According to one embodiment of the present application, referring to Figures 1-3 As shown in the figure, the hidden needle assembly further comprises a push key 8, which is arranged on the body 1 and connected with the hidden needle sleeve 3, and is used to drive the hidden needle sleeve 3 to slide in and out. Specifically, a sliding groove 9 is formed on the body 1 to accommodate the push key 8, and the push key 8 can slide in the sliding groove 9 in the direction of expansion and contraction. The first end of the hidden needle sleeve 3 is provided with a connecting part 10, and the inner end of the push key 8 is fixedly connected with the connecting part 10 of the hidden needle sleeve 3. When the push key 8 is pushed, the hidden needle sleeve 3 can be driven to move synchronously. By arranging the push key 8, the user can actively control the extension and retraction of the hidden needle sleeve 3 through the push key 8, thereby further improving the user experience.

[0068] In one specific example, the injection needle of the cartridge bottle 2 can be better installed and disassembled by pushing the push key 8. Specifically, the push key 8 does not need to be operated during injection. When the injection is completed and the injection needle needs to be disassembled, the injection needle is hidden by the hidden needle sleeve 3 at this time, and the push key 8 can be pushed to compress the elastic member 6, so that the hidden needle sleeve 3 retreats to expose the injection needle, thereby facilitating the user to disassemble the injection needle. Similarly, before injection, the push key 8 can also be pushed to compress the elastic member 6 when the injection needle is installed, thereby facilitating the user to connect the injection needle with the outlet end of the cartridge bottle 2.

[0069] According to one embodiment of the present application, referring to Figure 5 As shown in the figure, the end surface of the injection outlet of the body 1 is provided with a first flange 11, and the first end surface of the hidden needle sleeve 3 is provided with a second flange 12. When the hidden needle sleeve 3 is in the first position, the second flange 12 abuts against the first flange 11. When the hidden needle sleeve 3 is in the second position, the second flange 12 is separated from the first flange 11. By arranging the flange structure, the movement stroke of the hidden needle sleeve 3 can be limited, so that the hidden needle sleeve 3 is always clamped at the injection outlet of the body 1 and is not easy to fall off.

[0070] According to one embodiment of the present application, the first flange 11 of the injection outlet of the body 1 is provided with a receiving groove 13, the position sensor 4 is a Hall switch, the Hall switch is arranged in the receiving groove 13, and the second end (the lower end in this example) of the hidden needle sleeve 3 is provided with a first magnetic member 14 matched with the Hall switch. Specifically, when the hidden needle sleeve 3 is in the first position and extends out of the injection outlet of the body 1, the first magnetic member 14 is away from the Hall switch, thereby being out of the detection range of the Hall switch. The Hall switch sends a closing signal to the injection assembly, and the injection assembly does not perform injection. When the hidden needle sleeve 3 is in the second position and is retracted into the injection outlet of the body 1, the second end surface of the hidden needle sleeve 3 is flush with the end surface of the injection outlet at the bottom of the body 1, i.e., they are in the same plane. At this time, the first magnetic member 14 approaches the Hall switch and is in the detection range of the Hall switch, thereby triggering the Hall switch to send an opening signal to the injection assembly, and the injection assembly performs injection.

[0071] It can be understood that the Hall switch is a new type of electrical appliance accessory, has the characteristics of non-contact, low power consumption, long service life, high response frequency, etc., is integrally encapsulated by epoxy resin, can work reliably in various harsh environments, and is beneficial to improve the reliability of the injection device.

[0072] The specific type of the first magnetic member 14 is not particularly limited as long as it has magnetism and can cooperate with the Hall switch, for example, the first magnetic member 14 can be a magnet.

[0073] In addition, the magnet can be designed as a small sheet and embedded in the inside of the second end of the needle sleeve 3, which can reduce the mass and ensure the aesthetics.

[0074] According to one embodiment of the present application, referring to Figure 4 As shown in the figure, the injection assembly mainly comprises: a driving assembly and a controller 15, the driving assembly is arranged on the upper part of the body 1, used to push the rubber plug of the cartridge bottle 2 in the lower part of the body 1, so that the medicine in the cartridge bottle 2 is injected into the human body through the injection needle; the controller 15 is electrically connected with the driving assembly and the position sensor 4 respectively, used to control the whole injection process of the injection device.

[0075] According to one embodiment of the present application, referring to Figure 4 As shown in the figure, the driving assembly mainly comprises: a bracket 16, a driving motor 17, a lead screw 18, a lead screw sleeve 19 and a limiting seat 20. Among them, the bracket 16 is used as a mounting carrier, mainly used to integrate and install the driving motor 17, the lead screw 18, the lead screw sleeve 19 and the limiting seat 20 and other components, by integrally designing and assembling the above parts on the bracket 16, the integration and compactness of the overall structure are improved, which is beneficial to reduce the volume of the overall structure.

[0076] The driving motor 17 is fixedly installed on the bracket 16 by fasteners such as bolts and is electrically connected with the controller 15, the lead screw 18 is connected with the output shaft of the driving motor 17 in transmission, the driving motor 17 can drive the lead screw 18 to rotate when working; the lead screw sleeve 19 is threadedly sleeved on the outer wall of the lead screw 18, and the lead screw sleeve 19 will be rotated when the lead screw 18 rotates; the limiting seat 20 is fixedly installed on the bracket 16 by fasteners such as bolts, and the limiting seat 20 is formed with a limiting groove matched with the lead screw sleeve 19, that is, the lead screw sleeve 19 is arranged in the limiting groove, the rotation of the lead screw sleeve 19 can be limited by the limiting groove, and the lead screw sleeve is converted from rotary motion to linear motion to push the rubber plug of the cartridge bottle 2.

[0077] According to one of the embodiments of the present application, the limiting groove of the limiting seat 20 is substantially square, and the outer wall of the screw sleeve 19 is correspondingly formed with four planes which abut against the inner wall of the limiting groove of the limiting seat 20. When the screw 18 rotates, the limiting groove of the limiting seat 20 limits the rotation of the screw sleeve 19, so that the screw sleeve 19 reciprocally and linearly slides in the limiting groove.

[0078] According to one of the embodiments of the present application, the inner wall of the screw sleeve 19 is inlaid with the nut 21, and the screw sleeve 19 is threadedly connected with the outer thread of the screw 18 through the nut 21.

[0079] According to one of the embodiments of the present application, the controller 15 is integrally arranged on the bracket 16, and the controller 15 can be a PCB board which is integrally provided with a processor, a control chip, a display screen 22 and other elements.

[0080] According to one of the embodiments of the present application, the injection assembly further comprises a power supply which is arranged on the bracket 16 and electrically connected with the controller 15, and is used for supplying power to the whole assembly. In the present example, the power supply is a lithium battery.

[0081] According to one of the embodiments of the present application, the screw sleeve 19 is provided with an end cover 23 at the end (i.e. the lower end) away from the driving motor 17, which is used for sealing the screw sleeve 19, so as to avoid impurities from entering the screw sleeve 19, to ensure the moving performance of the screw sleeve 19, thereby improving the injection precision of the assembly; in addition, the end cover 23 can prevent moisture or electrolyte solution from entering the screw sleeve 19, to avoid the screw 18 and the screw sleeve 19 from rusting, and to improve the service life.

[0082] It is worth mentioning that, by arranging the end cover 23, the contact area with the rubber plug of the vial 2 can be increased, so as to ensure that the rubber plug stably moves in the vial 2, to improve the stability of the injection process, and to accurately control the injection amount of the medicine.

[0083] According to one of the embodiments of the present application, as shown in Figures 1-4 , the machine body 1 comprises a main control bin 101 and a medicine bin 102 which are detachably connected, and the injection assembly is arranged in the main control bin 101; the needle hiding assembly is arranged in the medicine bin 102, the bottom end of the medicine bin 102 is formed with an injection outlet, and the medicine bin 102 is provided with the vial 2, the injection needle of the vial 2 is located outside the injection outlet and is adapted to be shielded by the needle hiding sleeve 3.

[0084] In addition, the injection needle is sleeved with a needle cap 24, so as to protect the injection needle, thereby ensuring the safety.

[0085] In this embodiment of the invention, the main body 1 is designed as a detachable split structure, which makes it easy to carry. On the other hand, the main control compartment 101 and the medicine compartment 102 can be stored separately. The main control compartment 101 can be placed in a protective box and stored in a cool place, while the medicine compartment 102 can be placed in another protective box and then refrigerated at 2-8°C to ensure the quality of the medicine in the cartridge bottle 2 in the medicine compartment 102.

[0086] It is understandable that when the body 1 is a split structure, the wiring of the Hall switch and the controller 15 can be detachably connected through connectors and other components, thereby achieving synchronous assembly of the mechanical structure and the circuit structure.

[0087] According to one embodiment of the present invention, the connecting end (i.e., the lower end) of the main control compartment 101 and the connecting end (i.e., the upper end) of the medicine compartment 102 are connected by a snap-fit ​​and slot structure.

[0088] In related technologies, electronic injection pens have power on / off buttons. For special groups such as the elderly, disabled, or child patients, using them requires not only stabilizing the electronic injection pen with the injection needle, but also operating the injection button, power on / off button, and other buttons, making it extremely inconvenient.

[0089] To solve the above technical problems, refer to Figure 6 As shown, in this embodiment of the invention, one of the connection ends of the main control chamber 101 and the connection ends of the drug chamber 102 is provided with a second magnetic element 25, and the other is provided with a magnetic sensing element 26 that cooperates with the second magnetic element 25. The magnetic sensing element 26 is electrically connected to the injection assembly and is used to control the on / off state of the injection device.

[0090] Specifically, the magnetic sensing element 26 is electrically connected to the controller 15 of the injection assembly. When the main control chamber 101 and the drug chamber 102 are engaged, the magnetic sensing element 26 detects the magnetism of the second magnetic component 25 and sends a power-on signal to the controller 15, automatically powering on the injection device. When the main control chamber 101 and the drug chamber 102 are separated, the magnetic sensing element 26 separates from the second magnetic component 25, the magnetism disappears, and the magnetic sensing element 26 sends a power-off signal to the controller 15, causing the injection device to enter a power-off or sleep state. Therefore, this embodiment of the invention achieves the power-on and power-off of the device by sensing the presence or absence of magnetism.

[0091] In other examples, if the user forgets to separate the main control compartment 101 and the medicine compartment 102 after using the injection device, the controller 15 can be set to automatically shut down the device after N seconds of inactivity to save power.

[0092] Therefore, the injection device provided by the embodiment of the present application can realize switching on and off of the injection device by combining the body 1 split structure with the magnetic induction technology, can save the switching on and off button, and can realize the control of switching on and off of the injection device without the switching on and off button, and has the characteristics of simple structure, convenient use, high safety performance and the like.

[0093] In one specific example, the second magnetic member 25 is embedded in the inner part of the upper end of the medicine bin 102, and the magnetic induction element 26 is embedded in the inner part of the lower end of the main control bin 101. In this way, on the one hand, the magnetic induction element 26 is convenient for connecting the wiring with the controller 15; on the other hand, the design can ensure the aesthetic appearance.

[0094] The specific type of the second magnetic member 25 is not particularly limited, as long as it has magnetism and can cooperate with the magnetic induction element 26, for example, the second magnetic member 25 can be a magnet.

[0095] In addition, the magnet can be designed as a small sheet, which can reduce the mass.

[0096] According to one embodiment of the present application, as shown in Figure 1 and Figure 3 , the back side of the main control bin 101 of the body 1 is formed with an arc-shaped recess 27. In use, the user holds the body 1 by hand, and the fingers can be placed in the arc-shaped recess 27, so as to hold the injection device more comfortably. Therefore, the embodiment of the present application can improve the user experience by this design.

[0097] According to one embodiment of the present application, as shown in Figure 3 , the medicine bin 102 of the body 1 is provided with a transparent observation window 28, which can facilitate the observation of the installation condition of the injection needle and the amount of medicine in the cassette bottle 2.

[0098] The working principle of the injection device with the hidden needle assembly provided by the present application will be described below in combination with one specific embodiment, which generally includes an automatic start-up injection process and an automatic shutdown process after injection.

[0099] Automatic start-up injection process: the main control bin 101 is connected with the medicine bin 102, the magnetic induction element 26 on the main control bin 101 is attracted to the second magnetic member 25 on the medicine bin 102, the magnetic induction element 26 senses the magnetism, the magnetic induction element 26 feeds back the signal to the controller 15, and the injection device is automatically started; as the user contacts the injection device with the skin, the second end face of the hidden needle sleeve 3 will shrink to the same plane as the end face of the injection outlet of the body 1 due to the pressure, that is, in the second position, the Hall switch detects the first magnetic member 14, the Hall switch is in the open state (with injection conditions), and the Hall switch feeds back the signal to the controller 15, and the controller 15 controls the driving motor 17 to rotate, drives the lead screw sleeve 19 to push the rubber plug of the cassette bottle 2, and starts injection.

[0100] The automatic shutdown process after injection: after injection, the needle sleeve 3 is reset to the initial first position, the first magnetic member 14 is separated from the detection range of the Hall switch, the Hall switch is in the off state at this time, the Hall switch feeds back this signal to the controller 15, and the injection device stops injection; as the user separates the main control bin 101 and the medicine bin 102, the magnetic induction element 26 on the main control bin 101 is separated from the second magnetic member 25 on the medicine bin 102, the magnetism disappears, and the magnetic induction element 26 feeds back this signal to the controller 15, and the injection device enters the shutdown state.

[0101] In summary, the injection device of the present application can achieve the effects of no switch key and injection key automatic on-off, and injection at any time by setting the first magnetic member 14, the position sensor 4, the second magnetic member 25 and the magnetic induction element 26.

[0102] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An injection device containing a needle hiding assembly, characterized in that The injection device comprises: a body formed with an injection outlet; a needle cover assembly comprising a needle cover and a position sensor, the needle cover being slidably connected to the injection outlet and adapted to switch between a first position in which the needle cover extends out of the injection outlet and a second position in which the needle cover is retracted into the injection outlet, and the position sensor being arranged at the injection outlet for detecting the position of the needle cover; an injection assembly arranged in the body and electrically connected to the position sensor; the needle cover assembly further comprises: a guide sleeve arranged in the body along the extension and retraction direction of the needle cover; a resilient member arranged in the guide sleeve; a guide post arranged on the first end of the needle cover along the extension and retraction direction, the guide post being slidably arranged in the guide sleeve and connected to the resilient member; a toggle key arranged on the body and connected to the needle cover for driving the needle cover to slide in the extension and retraction direction; an end surface of the injection outlet is formed with a first flange, and an end surface of the first end of the needle cover is formed with a second flange, in the first position, the second flange abuts against the first flange, and in the second position, the second flange is separated from the first flange.

2. The needle-in-hub assembly injection device of claim 1, wherein, The first flange is formed with a receiving groove, the position sensor is a Hall switch, the Hall switch is arranged in the receiving groove, and the second end of the needle cover is provided with a first magnetic member matched with the Hall switch.

3. The needle-in-hub assembly injection device of claim 1, wherein, The injection assembly comprises: a driving assembly for pushing the rubber plug of a cartridge arranged in the body; a controller electrically connected to the driving assembly and the position sensor, respectively.

4. The needle-in-hub assembly injection device of claim 3, wherein, The driving assembly comprises: a bracket; a driving motor arranged on the bracket and electrically connected to the controller; a lead screw connected in transmission with the driving motor, the driving motor being adapted to drive the lead screw to rotate; a lead screw sleeve threadedly sleeved on the outer wall of the lead screw; a limiting seat arranged on the bracket and formed with a limiting groove matched with the lead screw sleeve for enabling the lead screw sleeve to move linearly to push the rubber plug of the cartridge.

5. The needle-inclusion assembly of any one of claims 1-4, wherein, The body comprises: a main control compartment in which the injection assembly is arranged; a medicine compartment in which the needle cover assembly is arranged, the medicine compartment being formed with the injection outlet, the medicine compartment being provided with a cartridge, and the injection needle of the cartridge being located outside the injection outlet and adapted to be shielded by the needle cover; and the main control compartment and the medicine compartment are detachably connected.

6. The needle-in-hub assembly of claim 5, wherein, One of the connecting end of the main control compartment and the connecting end of the medicine compartment is provided with a second magnetic member, and the other is provided with a magnetic sensing element matched with the second magnetic member for controlling the on-off of the injection device.

Images