CN213347232U

CN213347232U - Injection pen

Info

Publication number: CN213347232U
Application number: CN202020856433.8U
Authority: CN
Inventors: 谌辉; 陈松; 曹兵; 陆慧云; 孙振宇
Original assignee: Wuxi Hongyu Medical Technology Co ltd
Current assignee: Wuxi Hongyu Medical Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-06-04
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses an injection pen, including the shell body with can set up with reciprocating sliding in the inside sliding base of shell body, one side of sliding base is provided with the storage drug bin of side flip formula, the inside in storage drug bin can be dismantled installs the medicine bottle, the inside of medicine bottle is provided with the piston, the cooperation the medicine bottle in be provided with the injection drive arrangement of dosing on the sliding base, the injection drive arrangement of dosing includes push rod, driving motor, reduction gear and lead screw, driving motor's output and the input transmission of reduction gear are connected, the output and the lead screw transmission of reduction gear are connected, push rod threaded connection in on the lead screw, the last position of sliding base one side in storage drug bin is provided with contact switch, installs pressure sensor on the terminal surface of the front end of push rod. The injection pen can discharge air in the medicine bottle, realizes automatic filling of liquid medicine in the medicine bottle, avoids air from entering a human body, and greatly improves safety.

Description

Injection pen

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an injection pen.

Background

Chinese patent application No. 201910937222.9 discloses a full-automatic electronic insulin injection pen, which comprises an outer shell and a sliding base, one side of the sliding base is provided with a drug storage bin with a side-flip cover, a drug bottle is installed in the drug storage bin, a drug administration injection driving device is arranged on the sliding base in cooperation with the drug bottle, the drug administration injection driving device comprises a driving rod, a needle implantation driving device is arranged on the sliding base, a drug storage bin safety device which is configured to enable the drug storage bin to be opened after the driving rod retracts to the right position is arranged between the outer shell and the drug storage bin, and a needle safety device which is configured to enable the drug storage bin to be opened after the needle is completely detached is arranged at the front end of the drug storage bin. The full-automatic electronic insulin injection pen is simple in structure, convenient and quick to change the medicine and stable and reliable in operation; and the medicine storage bin can be opened only after the injection needle is taken down and the driving rod is completely retracted to the right position, so that misoperation of a user is avoided, and the safety and reliability of the full-automatic injector are improved.

Above-mentioned full-automatic electronic type insulin injection pen can realize the autoinjection of insulin, however, receives technical limitation, has some air in the medicine bottle inevitable, can't realize the liquid medicine and be full, if adopt the injection of straight connecing of above-mentioned full-automatic electronic type insulin injection, can inject some air into the human body, serious probably causes pain, local tissue necrosis and subcutaneous emphysema scheduling problem, from this, the urgent need is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned problem, provide an injection pen to solve current full-automatic electronic type insulin injection pen can't inject partial air into the human body with the gas outgoing in the medicine bottle, during the injection insulin, serious can cause the problem of pain, local tissue necrosis and subcutaneous emphysema.

The utility model aims at realizing through the following technical scheme:

the utility model provides an injection pen, includes the shell body and can set up with reciprocating sliding in the inside sliding base of shell body, one side of sliding base is provided with the storage drug bin of side flip formula, the inside in storage drug bin can be dismantled installs the medicine bottle, the inside of medicine bottle is provided with the piston, the cooperation the medicine bottle in be provided with the injection drive arrangement of dosing on the sliding base, the injection drive arrangement of dosing includes push rod, driving motor, reduction gear and lead screw, driving motor's output with the input transmission of reduction gear is connected, the output of reduction gear with the lead screw transmission is connected, push rod threaded connection in on the lead screw, lie in on the sliding base one side in storage drug bin is provided with contact switch, install pressure sensor on the terminal surface of the front end of push rod, storage drug bin has open mode, Closed state is 2 states altogether, works as be equipped with the medicine bottle in the storage storehouse and be in during the closed state, the medicine bottle top bumps contact switch so that driving motor starts and drive the push rod and stretch out, realizes that the medicine bottle traditional chinese medicine liquid's is automatic to be full.

As a preferred scheme of the utility model, still including being used for injecing the travel switch of the flexible stroke of push rod.

As an optimized scheme of the utility model, driving motor is servo motor.

As a preferred scheme of the utility model, be fixed with the transmission piece on the sliding bottom seat, transmission piece threaded connection is on the slip lead screw, fixedly connected with sliding motor on the shell body, sliding motor's output shaft is connected with the input shaft transmission of slip reduction gear, the output shaft of slip reduction gear with the transmission of slip lead screw is connected.

As an optimized scheme of the utility model, the internally mounted of shell body has the fixed plate, it has the spout to open on the fixed plate, be provided with on the sliding base with spout sliding fit's slider.

The beneficial effects of the utility model are that, an injection pen can discharge the air in the medicine bottle, realizes that the automation of liquid medicine is sufficient in the medicine bottle, avoids the air admission human body, has improved the security greatly.

Drawings

FIG. 1 is a schematic perspective view of an injection pen;

fig. 2 is a schematic cross-sectional structure diagram of an injection pen.

In the figure:

1. an outer housing; 2. a slide base; 3. a medicine storage bin; 4. a medicine bottle; 5. a piston; 6. a push rod; 7. a drive motor; 8. a speed reducer; 9. a screw rod; 10. a contact switch.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the present invention and are not limiting thereof.

Referring to fig. 1 and 2, fig. 1 is a schematic perspective view of an injection pen; fig. 2 is a schematic cross-sectional structure diagram of an injection pen.

In this embodiment, an injection pen includes an outer casing 1 and a sliding base 2 capable of being reciprocally slidably disposed inside the outer casing 1, a drug storage bin 3 with a side-hinged cover is disposed on one side of the sliding base 2, a drug bottle 4 is detachably disposed inside the drug storage bin 3, a piston 5 is disposed inside the drug bottle 4, the drug bottle 4 is matched with a drug delivery injection driving device disposed on the sliding base 2, the drug delivery injection driving device includes a push rod 6, a driving motor 7, a speed reducer 8 and a lead screw 9, an output end of the driving motor 7 is in transmission connection with an input end of the speed reducer 8, an output end of the speed reducer 8 is in transmission connection with the lead screw 9, the push rod 6 is in threaded connection with the lead screw 9, a contact switch 10 is disposed on one side of the drug storage bin 3 on the sliding base 2, and a pressure sensor is disposed on an end face of a front end of the push rod 6, medicine storage 3 has 2 states totally of open mode, closed state, works as medicine storage 3 is equipped with medicine bottle 4 in and is in during the closed state, 4 bumps on the top of medicine bottle contact switch 10 so that driving motor 7 starts and drive push rod 6 and stretch out, realizes that the automation of medicine liquid is abundant in medicine bottle 4.

In order to limit the extension and retraction stroke of the push rod 6, the administration injection driving device also comprises a travel switch for limiting the extension and retraction stroke of the push rod 6.

In order to improve the control accuracy, in this embodiment, the driving motor 7 is a servo motor.

Specifically, in this embodiment, be fixed with the transmission piece on slide base 2, transmission piece threaded connection is on sliding screw, fixedly connected with sliding motor on the shell body 1, sliding motor's output shaft and sliding reducer's input shaft transmission are connected, sliding reducer's output shaft with sliding screw transmission is connected, and is further, in order to improve gliding stability, in this embodiment, the internally mounted of shell body 1 has the fixed plate, it has the spout to open on the fixed plate, slide base 2 is last be provided with spout sliding fit's slider.

When the injection device works, when a medicine bottle 4 is loaded into the medicine storage bin 3, and the medicine storage bin 3 is closed, the body of the medicine bottle 4 touches the contact switch 10, the contact switch 10 sends a signal to the controller, the controller controls the driving motor 7 to start, and further drives the screw rod 9 to rotate, so as to drive the push rod 6 to extend out, when the push rod 6 touches the piston 5 in the medicine bottle 4, the push rod 6 drives the piston 5 to advance to discharge air, after the air is discharged, the push rod 6 stops advancing, in the process, the judgment is carried out through a pressure signal given by a pressure sensor at the front end of the push rod 6, the thrust required by air discharge is smaller than the thrust required by injection, therefore, the pressure applied at the front end of the push rod 6 is detected, the signal is fed back to the controller in real time, when the set upper limit value of the pressure is reached, the driving motor 7 is immediately controlled to stop running, the push rod 6 does not advance, the liquid medicine in the medicine bottle 4 reaches the filling state.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims.

Claims

1. The utility model provides an injection pen, include the shell body with can set up with reciprocating sliding in the inside sliding base of shell body, one side of sliding base is provided with the storage drug bin of side flip formula, the inside in storage drug bin can be dismantled installs the medicine bottle, the inside of medicine bottle is provided with the piston, the cooperation the medicine bottle in be provided with the injection drive arrangement of dosing on the sliding base, the injection drive arrangement of dosing includes push rod, driving motor, reduction gear and lead screw, driving motor's output with the input transmission of reduction gear is connected, the output of reduction gear with lead screw transmission connects, push rod threaded connection in on the lead screw, its characterized in that: lie in on the sliding base one side in the storage medicine storehouse is provided with contact switch, install pressure sensor on the terminal surface of the front end of push rod, the storage medicine storehouse has 2 states totally of open mode, closed state, works as be equipped with the medicine bottle in the storage medicine storehouse and be in during the closed state, the medicine bottle bumps the contact switch is in order to make driving motor start and drive the push rod and stretch out, realizes that the automation of medicine liquid is full in the medicine bottle.

2. An injection pen according to claim 1, wherein: and the travel switch is used for limiting the telescopic travel of the push rod.

3. An injection pen according to claim 2, wherein: the driving motor is a servo motor.

4. An injection pen according to any one of claims 1 to 3, wherein: the sliding base is fixedly provided with a transmission block, the transmission block is in threaded connection with the sliding screw rod, the shell is fixedly connected with a sliding motor, an output shaft of the sliding motor is in transmission connection with an input shaft of the sliding speed reducer, and an output shaft of the sliding speed reducer is in transmission connection with the sliding screw rod.

5. An injection pen according to claim 4, wherein: the inner mounting of shell body has the fixed plate, it has the spout to open on the fixed plate, be provided with on the sliding base with spout sliding fit's slider.