Quick-release structure for the needle of an electronic injection pen and electronic injection pen

Abstract

The present invention discloses a quick-disassembly structure for the needle of an electronic injection pen and an electronic injection pen. The quick-disassembly structure for the needle of the electronic injection pen includes a needle and a quick-disassembly component. The needle is detachably installed at the front end of a medicine storage chamber. The medicine storage chamber has a side flip-up structure, and the medicine storage chamber is installed on one side of a sliding base. The sliding base is reciprocally slidably arranged inside a housing body. A driving device for driving the sliding base to reciprocate is arranged inside the housing body. The quick-disassembly component includes a contact switch, a switch dial, and a protective cover for covering the needle. The contact switch is fixed inside the housing body, and the switch dial is fixed on the protective cover. Compared with the prior art, the present invention can quickly realize the replacement of the needle, and the operation is convenient and simple.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a needle quick-release structure for an electronic injection pen and an electronic injection pen. Background Art

[0002] Chinese patent document with application number 201910937222.9 discloses a fully automatic electronic insulin injection pen, which includes an outer shell and a sliding base. A side flip-up medicine storage chamber is provided on one side of the sliding base. A medicine bottle is installed in the medicine storage chamber. A drug administration injection driving device is provided on the sliding base in cooperation with the medicine bottle. The drug administration injection driving device includes a driving rod. An injection needle implantation driving device is provided on the sliding base. A medicine storage chamber safety insurance device configured to open the medicine storage chamber only after the driving rod retracts in place is provided between the outer shell and the medicine storage chamber. An injection needle safety insurance device configured to open the medicine storage chamber only after the injection needle is completely removed is provided at the front end of the medicine storage chamber. The above fully automatic electronic insulin injection pen not only has a simple structure, is convenient and fast for changing medicine, and operates stably and reliably; but also the medicine storage chamber can only be opened after removing the injection needle and the driving rod retracts completely in place, avoiding misoperation by the user and improving the safety and reliability of the fully automatic syringe.

[0003] However, the sliding base of the above fully automatic electronic insulin injection pen is located inside the outer shell, and only the injection needle protrudes through the hole on the outer shell. However, the outer shell is a closed structure, and when it is necessary to replace the injection needle, the operation is extremely inconvenient. Therefore, this problem needs to be solved urgently. Summary of the Invention

[0004] The purpose of the present invention is to provide a needle quick-release structure for an electronic injection pen and an electronic injection pen to solve the problem of inconvenient replacement of the injection needle of the existing fully automatic electronic insulin injection pen.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A quick-release needle structure for an electronic injection pen comprises a needle and a quick-release assembly, wherein the needle can be detachably mounted at the front end of a drug storage bin, the drug storage bin is a side flip-cover structure, and the drug storage bin is mounted on one side of a sliding base, the sliding base can be reciprocatingly slidably arranged inside an outer shell, a driving device for driving the sliding base to reciprocate is arranged inside the outer shell, the quick-release assembly comprises a contact switch, a switch block and a protective cover for covering the needle, the contact switch is fixed inside the outer shell, the switch block is fixed on the protective cover, and the protective cover has two states, namely, an open state and a closed state; when the protective cover is in the open state, the switch block on the protective cover is disengaged from the contact switch so that the driving device is started and drives the needle to extend to the front end; when the protective cover is in the closed state, the switch block hits the contact switch so that the driving device is started and drives the needle to reset.

[0007] As a preferred solution of the present invention, one end of the protective cover is hinged to the outer shell through a pin, and the other end of the protective cover is snap-connected to the front end of the outer shell.

[0008] As a preferred solution of the present invention, the outer shell includes a front cover plate located at the front end thereof, a first through hole for the needle to extend out is formed on the front cover plate, an active hook is movably connected to the inner end of the front cover plate, a second through hole is formed on the active hook at a position corresponding to the first through hole, and a protruding hook portion is provided on one side of the active hook, an opening is formed on the front cover plate for the hook portion to extend out, a slot matching the hook portion is provided on the protective cover, a spring slot is formed on the other side of the active hook, a spring is installed in the spring slot so that the hook portion extends out from the opening of the front cover plate, and a pressing assembly is installed on the outer shell to drive the active hook to retract so that the hook portion is disengaged from the slot.

[0009] As a preferred solution of the present invention, the pressing assembly includes a button installed on the outer shell and a toggle block located inside the outer shell, the toggle block is rotatably connected to the front cover plate via a rotating shaft, the toggle block includes a transmission part and a pushing part, the transmission part is fixedly connected to the inner end of the button, a protruding abutting part is provided on the movable hook, the pushing part abuts against the abutting part, and a first torsion spring is installed on the rotating shaft.

[0010] As a preferred solution of the present invention, a second torsion spring is installed on the pin shaft so that the protective cover is automatically opened when the movable hook is disengaged from the slot.

[0011] As a preferred embodiment of the present invention, a skin sensor is provided on the outer surface of the protective cover, and an elastic conductive column electrically connected to the skin sensor is installed on the protective cover. A conductor is fixedly connected to the front cover plate. The conductor is electrically connected to the controller, and a conductive groove matching with the elastic conductive column is formed on the conductor. When the protective cover is in an open state, the elastic conductive column disengages from the conductive groove. When the protective cover is in a closed state, the elastic conductive column is inserted into the conductive groove.

[0012] As a preferred embodiment of the present invention, the driving device includes a sliding motor, a sliding speed reducer, a sliding lead screw and a transmission block. The transmission block is threadedly connected to the sliding lead screw, and the transmission block is fixedly connected to the sliding base. The output shaft of the sliding motor is drivingly connected to the input shaft of the sliding speed reducer, and the output shaft of the sliding speed reducer is drivingly connected to the sliding lead screw.

[0013] As a preferred embodiment of the present invention, a fixing plate is installed inside the outer housing. A sliding groove is formed on the fixing plate, and a sliding block slidably matched with the sliding groove is arranged on the sliding base.

[0014] As a preferred embodiment of the present invention, a drug administration injection driving device is arranged on the sliding base. The drug administration injection driving device includes a push rod, a driving motor, a speed reducer and a lead screw. The output end of the driving motor is drivingly connected to the input end of the speed reducer, the output end of the speed reducer is drivingly connected to the lead screw, and the push rod is threadedly connected to the lead screw.

[0015] An electronic injection pen includes a needle quick-release structure of an electronic injection pen as described above.

[0016] The beneficial effect of the present invention is that, compared with the prior art, the present invention can quickly realize the replacement of the needle, and the operation is convenient and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of a needle quick-release structure of an electronic injection pen;

[0018] Figure 2 is an internal structure schematic diagram of a needle quick-release structure of an electronic injection pen;

[0019] Figure 3 is another internal structure schematic diagram of a needle quick-release structure of an electronic injection pen;

[0020] Figure 4 is a structural schematic diagram of a movable hook;

[0021] Figure 5 is a structural schematic diagram of a pressing component.

[0022] In the figure:

[0023] 1. Outer housing; 2. Protective cover; 3. Elastic conductive column; 4. Conductor; 5. Conductive groove; 6. Contact switch; 7. Switch slider; 8. Front cover plate; 9. Movable hook; 10. Button; 11. Toggle block; 12. Spring; 13. Card slot; 14. Sliding base; 15. Hook part; 16. Second through hole; 17. Abutting part; 18. Spring groove; 19. Transmission part; 20. Pushing part; 21. Needle. Specific embodiments

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments. It can be understood that the embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0025] Please refer to Figures 1 to 5 as shown Figure 1 which is a three-dimensional schematic diagram of a quick-release structure of the needle of an electronic injection pen; Figure 2 which is an internal structure schematic diagram of a quick-release structure of the needle of an electronic injection pen; Figure 3 which is another internal structure schematic diagram of a quick-release structure of the needle of an electronic injection pen; Figure 4 which is a structural schematic diagram of the movable hook; Figure 5 which is a structural schematic diagram of the pressing assembly.

[0026] In this embodiment, a quick-release structure of the needle of an electronic injection pen includes a needle 21 and a quick-release assembly. The needle 21 is detachably installed at the front end of the medicine storage chamber. The medicine storage chamber has a side flip-up structure, and the medicine storage chamber is installed on one side of the sliding base 14. The sliding base 14 is reciprocally slidably arranged inside the outer housing 1. A driving device for driving the sliding base 14 to reciprocate is arranged inside the outer housing 1. The quick-release assembly includes a contact switch 6, a switch slider 7, and a protective cover 2 for covering the needle 21. One end of the protective cover 2 is hinged to the outer housing 1 through a pin shaft, and the other end of the protective cover 2 is snap-connected to the front end of the outer housing 1. The contact switch 6 is fixed inside the outer housing 1, and the switch slider 7 is fixed on the protective cover 2. The protective cover 2 has two states: an open state and a closed state. When the protective cover 2 is in the open state, the switch slider 7 on the protective cover 2 disengages from the contact switch 6 so that the driving device is activated and drives the needle 21 to extend forward. When the protective cover 2 is in the closed state, the switch slider 7 abuts against the contact switch 6 so that the driving device is activated and drives the needle 21 to reset.

[0027] Specifically, in this embodiment, the outer housing 1 includes a front cover plate 8 at its front end. A first through hole for the needle 21 to protrude is formed in the front cover plate 8. The inner end of the front cover plate 8 is movably connected with a movable hook 9. A second through hole 16 is formed in the movable hook 9 corresponding to the position of the first through hole. And a protruding hook portion 15 is provided on one side of the movable hook 9. An opening for the hook portion 15 to protrude is formed in the front cover plate 8. A clamping groove 13 matching with the hook portion 15 is provided on the protective cover 2. A spring groove 18 is formed on the other side of the movable hook 9. A spring 12 is installed in the spring groove 18 to make the hook portion 15 protrude from the opening of the front cover plate 8. A pressing assembly is installed on the outer housing 1 to drive the movable hook 9 to retract so that the hook portion 15 is disengaged from the clamping groove 13. The pressing assembly includes a key 10 installed on the outer housing 1 and a toggle block 11 located inside the outer housing 1. The toggle block 11 is rotatably connected to the front cover plate 8 through a rotating shaft. The toggle block 11 includes a transmission portion 19 and a pressing portion 20. The transmission portion 19 is fixedly connected to the inner end of the key 10. A protruding abutting portion 17 is provided on the movable hook 9. The pressing portion 20 abuts against the abutting portion 17. A first torsion spring is installed on the rotating shaft.

[0028] In order to enable the protective cover 2 to automatically open when the movable hook 9 is disengaged from the clamping groove 13, in this embodiment, a second torsion spring is installed on the pin shaft.

[0029] Specifically, in this embodiment, a skin sensor is provided on the outer surface of the protective cover 2. And an elastic conductive column 3 electrically connected to the skin sensor is installed on the protective cover 2. A conductor 4 is fixedly connected to the front cover plate 8. The conductor 4 is electrically connected to the controller. And a conductive groove 5 matching with the elastic conductive column 3 is formed in the conductor 4. When the protective cover 2 is in the open state, the elastic conductive column 3 is disengaged from the conductive groove 5. When the protective cover 2 is in the closed state, the elastic conductive column 3 is inserted into the conductive groove 5. By adopting the above structural design, when the protective cover 2 is in the open state, even if the skin sensor on the protective cover 2 contacts the skin, it cannot give a signal to the controller, so as to ensure that the drug injection driving device does not perform the drug injection action when the protective cover 2 is in the open state.

[0030] Specifically, in the present embodiment, the driving device includes a sliding motor, a sliding reducer, a sliding screw and a transmission block, the transmission block is threadedly connected to the sliding screw, and the transmission block is fixedly connected to the sliding base, the output shaft of the sliding motor is transmission-connected to the input shaft of the sliding reducer, and the output shaft of the sliding reducer is transmission-connected to the sliding screw; further, in order to improve the stability of the interaction, in the present embodiment, a fixed plate is installed inside the outer shell 1, a sliding groove is opened on the fixed plate, and a sliding block that slides with the sliding groove is provided on the sliding base 14.

[0031] Specifically, in this embodiment, a medication injection drive device is provided on the sliding base 14, and the medication injection drive device includes a push rod, a driving motor, a reducer and a screw rod. The output end of the driving motor is transmission-connected to the input end of the reducer, and the output end of the reducer is transmission-connected to the screw rod. The push rod is threadedly connected to the screw rod.

[0032] When the needle 21 needs to be replaced, the button 10 is pressed, which in turn drives the toggle block 11 to rotate, so that the movable hook 9 is disengaged from the slot 13, and the protective cover 2 is automatically opened under the action of the second torsion spring. At this time, the switch toggle block 7 is disengaged from the contact switch 6, and the contact switch 6 gives a signal to the controller. The controller controls the sliding motor to start, thereby driving the sliding base 14 to move forward, so that the needle 21 is extended, thereby facilitating the replacement of the needle 21.

[0033] This embodiment also discloses an electronic injection pen, including the needle quick-release structure of the electronic injection pen as described above.

[0034] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subjected to various changes and modifications, which are within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims.

Claims

1. A quick-release needle structure for an electronic injection pen, comprising a needle and a quick-release assembly, wherein the needle can be detachably mounted on the front end of a drug storage bin, the drug storage bin is a side flip-cover structure, and the drug storage bin is mounted on one side of a sliding base, the sliding base can be reciprocatingly slidably arranged inside an outer shell, and a driving device for driving the sliding base to reciprocate is arranged inside the outer shell, Features: The quick-release assembly includes a contact switch, a switch block, and a protective cover for covering the needle, wherein the contact switch is fixed inside the outer shell, the switch block is fixed on the protective cover, and the protective cover has two states: an open state and a closed state; When the protective cover is in the open state, the switch block on the protective cover disengages from the contact switch so that the drive device is started and drives the needle to extend to the front end; when the protective cover is in the closed state, the switch block hits the contact switch so that the drive device is started and drives the needle to reset, one end of the protective cover is hinged to the outer shell through a pin shaft, and the other end of the protective cover is connected to the front end of the outer shell by a snap-in connection, the outer shell includes a front cover plate located at the front end thereof, a first through hole for the needle to extend out is formed on the front cover plate, an active hook is movably connected to the inner side end of the front cover plate, a second through hole is formed on the active hook at a position corresponding to the first through hole, and a protruding hook portion is provided on one side of the active hook, and a protruding hook portion is provided on the front cover plate for the hook to be inserted The hook portion extends out of an opening, and the protective cover is provided with a slot matching the hook portion, a spring slot is provided on the other side of the movable hook, and a spring is installed in the spring slot so that the hook portion extends out from the opening of the front cover plate, and a pressing assembly is installed on the outer shell to drive the movable hook to retract so that the hook portion is disengaged from the slot, the pressing assembly includes a button installed on the outer shell and a toggle block located inside the outer shell, the toggle block is rotatably connected to the front cover plate via a rotating shaft, the toggle block includes a transmission part and a pushing part, the transmission part is fixedly connected to the inner side end of the button, a protruding abutting part is provided on the movable hook, the pushing part abuts against the abutting part, and a first torsion spring is installed on the rotating shaft.

2. The quick-release needle structure of an electronic injection pen according to claim 1, Features: A second torsion spring is installed on the pin shaft so that the protective cover is automatically opened when the movable hook is disengaged from the slot.

3. The quick-release needle structure of an electronic injection pen according to claim 2, Features: A skin sensor is provided on the outer surface of the protective cover, and an elastic conductive column electrically connected to the skin sensor is installed on the protective cover, a conductor is fixedly connected to the front cover plate, the conductor is electrically connected to the controller, and a conductive groove matching with the elastic conductive column is opened on the conductor; when the protective cover is in an open state, the elastic conductive column is separated from the conductive groove, and when the protective cover is in a closed state, the elastic conductive column is inserted into the conductive groove.

4. A needle quick-release structure of an electronic injection pen according to any one of claims 1 to 3, characterized in that: The driving device includes a sliding motor, a sliding reducer, a sliding lead screw and a transmission block. The transmission block is threadedly connected to the sliding lead screw, and the transmission block is fixedly connected to the sliding base. The output shaft of the sliding motor is drivingly connected to the input shaft of the sliding reducer, and the output shaft of the sliding reducer is drivingly connected to the sliding lead screw.

5. A needle quick-release structure of an electronic injection pen according to claim 4, characterized in that: A fixing plate is installed inside the outer shell body. A sliding groove is formed on the fixing plate, and a slider slidably matched with the sliding groove is arranged on the sliding base.

6. A needle quick-release structure of an electronic injection pen according to claim 5, characterized in that: A drug administration injection driving device is arranged on the sliding base. The drug administration injection driving device includes a push rod, a driving motor, a reducer and a lead screw. The output end of the driving motor is drivingly connected to the input end of the reducer, and the output end of the reducer is drivingly connected to the lead screw. The push rod is threadedly connected to the lead screw.

7. An electronic injection pen, characterized in that: It includes a needle quick-release structure of an electronic injection pen according to any one of claims 1 to 6.

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