Hand-operated insulin needle withdrawing device

Abstract

The utility model provides a hand-operated insulin needle withdrawing device which comprises a shell and a handle, the shell and the handle are integrally formed, and a roller, a sleeve, a transmission assembly and a needle withdrawing assembly are arranged in the shell. According to the hand-operated insulin needle withdrawing device, a user does not need to directly contact the needle with the hand, the needle of an insulin injection pen can be quickly disassembled, meanwhile, the needle withdrawing operation of the needle can be completed after the needle is disassembled, and therefore the needle stabbing event is effectively avoided, and operation is easy, convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a hand-cranked insulin needle ejector. Background Art

[0002] The insulin injection pen needs to be used with a disposable sterile needle. The needle is screwed and installed on the insulin injection pen. After removing the needle protective cover, the insulin drug can be injected. After the drug injection is completed, the user needs to manually screw the needle to remove the used needle from the insulin injection pen. It is easy to be pricked by the needle during the removal process. Summary of the invention

[0003] The purpose of the utility model is to provide a hand-cranked insulin needle ejector, which can realize quick removal of the needle without the user directly touching the needle with his hands, and can complete the needle ejection operation after removal, thereby effectively avoiding needle stick incidents.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] The hand-cranked insulin needle ejector comprises a shell and a handle, the shell and the handle are integrally formed, a roller, a sleeve, a transmission assembly and a needle ejector assembly are arranged inside the shell; the roller is fixedly connected to the sleeve;

[0006] The transmission assembly includes a fixed plate, a driving rod, a linkage gear, a hollow gear and a reset spring A; the driving rod is connected to the handle through a fixing nail, the fixing nail is fixedly connected to the handle, the driving rod is movably sleeved on the fixing nail, and the driving rod can rotate relative to the handle; one end of the reset spring A is connected to the handle, and the other end of the reset spring A is connected to the driving rod; one end of the driving rod is a fan-shaped gear, and a double gear A matching the fan-shaped gear is provided on the fixed plate, and the shaft of the double gear A is installed in a circular groove opened on the fixed plate, and a double gear B matching the double gear A is also provided on the fixed plate, and the shaft of the double gear B is installed in an arc track opened on the fixed plate, and the shaft of the double gear B can slide in the arc track; the hollow gear matching the double gear B is fixedly sleeved on the sleeve; the sleeve passes through the fixed plate;

[0007] The needle withdrawal assembly includes a sleeve, a needle withdrawal rod and a reset spring B. The needle withdrawal rod is movably arranged in the sleeve and both ends of the needle withdrawal rod extend out of the sleeve. The part of the surface of the needle withdrawal rod located in the sleeve is sleeved with a reset spring B. A fixed block is fixedly connected to the needle withdrawal rod, and a baffle is also fixedly connected to the sleeve. One end of the needle withdrawal rod is movably sleeved in the sleeve, and a groove is provided at the end of the needle withdrawal rod sleeved in the sleeve.

[0008] Furthermore, the sleeve is in a truncated cone shape.

[0009] The utility model has the following beneficial effects:

[0010] The hand-cranked insulin needle withdrawer of the utility model can realize the quick disassembly of the needle of the insulin injection pen, and can complete the needle withdrawal operation after disassembly, and the operation is simple, convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the hand-cranked insulin needle ejector of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the transmission assembly of the utility model.

[0013] 1-linkage gear A, 2-linkage gear B, 3-hollow gear, 4-driving rod, 5-arc track, 6-handle, 7-reset spring A, 8-reset spring B, 9-needle withdrawal rod, 10-fixed plate, 11-roller, 12-baffle, 13-sleeve, 14-casing, 15-fixed block, 16-housing. DETAILED DESCRIPTION

[0014] like Figure 1 , 2 As shown, the hand-cranked insulin needle ejector of the present invention comprises a shell 16 and a handle 6. The shell 16 and the handle 6 are integrally formed, and a roller 11, a sleeve 13, a transmission assembly and a needle ejector assembly are arranged inside the shell; the roller 11 is fixedly connected to the sleeve 13.

[0015] The transmission assembly includes a fixed plate 10, a driving rod 4, a linkage gear A1, a linkage gear B2, a hollow gear 3 and a reset spring A7; the driving rod 4 is connected to the handle 6 through a fixing nail, the fixing nail is fixedly connected to the handle 6, the driving rod 4 is movably sleeved on the fixing nail, and the driving rod 4 can rotate relative to the handle 6; one end of the reset spring A7 is connected to the handle 6, and the other end of the reset spring A7 is connected to the driving rod 4; one end of the driving rod 4 is a fan-shaped gear, and a double gear A1 matching the fan-shaped gear is provided on the fixed plate 10, and the shaft of the double gear A1 is installed in a circular groove opened on the fixed plate 10, and a double gear B2 matching the double gear A is also provided on the fixed plate 10, and the shaft of the double gear B2 is installed in an arc track 5 opened on the fixed plate 10, and the shaft of the double gear B2 can slide in the arc track 5; the hollow gear 3 matching the double gear B2 is fixedly sleeved on the sleeve 13; the sleeve 13 passes through the fixed plate 10.

[0016] The user holds the handle and presses the drive rod to rotate in the direction of the handle. The arc gear on the drive rod drives the small gear on the double gear A, thereby driving the double gear A to rotate. This is the first-stage transmission. The large gear on the double gear A drives the small gear on the double gear B, thereby driving the double gear B to rotate. This is the second-stage transmission. The large gear on the double gear B drives the hollow gear to rotate, thereby realizing the third-stage transmission. The large gear drives the small gear, and the third-stage speed increase transmission. The shaft on the double gear B can slide in the arc track to realize the variable center distance transmission. The purpose is: when the drive rod is reset under the rebound force of the reset spring A, it is ensured that the drum will not reverse when the drive rod is reset in the opposite direction, so it is necessary to disengage, and the implementation method is to increase the center distance.

[0017] The needle withdrawal assembly includes a sleeve 14, a needle withdrawal rod 9 and a reset spring B8. The needle withdrawal rod 9 is movably arranged in the sleeve 14 and both ends of the needle withdrawal rod extend out of the sleeve. The partial surface of the needle withdrawal rod 9 located in the sleeve 14 is sleeved with a reset spring B8. A fixing block 15 is fixedly connected to the needle withdrawal rod 9. A baffle 12 is also fixedly connected to the sleeve 14. One end of the needle withdrawal rod 9 is movably sleeved in the sleeve 13, and a groove is provided at the end of the needle withdrawal rod sleeved in the sleeve 13.

[0018] Furthermore, the sleeve is in the shape of a truncated cone, which is convenient for the user to clamp the small end of the truncated cone with the index finger and the middle finger, and press the needle withdrawal rod with the thumb to complete the needle withdrawal operation.

[0019] The working process and working principle of the hand-cranked insulin needle ejector of the utility model:

[0020] When in use, first insert the insulin injection pen needle into the drum, and let the needle tip extend into the sleeve. Hold the handle and press the drive rod to rotate in the direction of the handle. The fan gear, double gear A, double gear B, and hollow gear realize three-level transmission. The hollow gear drives the sleeve and the drum to rotate at the same time, and the needle cover can be loosened from the insulin injection pen. Hold the small end of the truncated cone with the index finger and middle finger, and press the needle withdrawal rod with the thumb. The groove of the needle withdrawal rod contacts the needle tip and bends the needle tip. At the same time, the needle cover is pushed out of the drum, and the needle removal operation is completed. The user does not need to directly touch the needle with his hands, and the needle can be quickly removed, thereby effectively avoiding needle punctures. The operation is convenient and quick. The reset spring B is located between the fixed block and the baffle. When the reset spring B is pressed, it is squeezed. After the needle withdrawal rod is released, the needle withdrawal rod is reset under the rebound force of the reset spring B. When the handle is held and the driving rod is pressed to rotate in the direction of the handle, the reset spring A is stretched. After the driving rod is released, the driving rod is reset under the action of the rebound force of the reset spring A, and the shaft on the double gear B slides downward in the arc track, and the double gear B disengages from the hollow gear, thereby ensuring that the drum will not reverse when the driving rod is reset in the opposite direction.

Claims

1. A hand-cranked insulin needle ejector, comprising a housing and a handle, wherein the housing and the handle are integrally formed, and characterized in that: A roller, a sleeve, a transmission assembly and a needle withdrawal assembly are arranged inside the housing; the roller is fixedly connected to the sleeve; The transmission assembly includes a fixed plate, a driving rod, a linkage gear, a hollow gear and a reset spring A; the driving rod is connected to the handle through a fixing nail, the fixing nail is fixedly connected to the handle, the driving rod is movably sleeved on the fixing nail, and the driving rod can rotate relative to the handle; one end of the reset spring A is connected to the handle, and the other end of the reset spring A is connected to the driving rod; one end of the driving rod is a fan-shaped gear, and a double gear A matching the fan-shaped gear is provided on the fixed plate, and the shaft of the double gear A is installed in a circular groove opened on the fixed plate, and a double gear B matching the double gear A is also provided on the fixed plate, and the shaft of the double gear B is installed in an arc track opened on the fixed plate, and the shaft of the double gear B can slide in the arc track; the hollow gear matching the double gear B is fixedly sleeved on the sleeve; the sleeve passes through the fixed plate; The needle withdrawal assembly includes a sleeve, a needle withdrawal rod and a reset spring B. The needle withdrawal rod is movably arranged in the sleeve and both ends of the needle withdrawal rod extend out of the sleeve. The part of the surface of the needle withdrawal rod located in the sleeve is sleeved with a reset spring B. A fixed block is fixedly connected to the needle withdrawal rod, and a baffle is also fixedly connected to the sleeve. One end of the needle withdrawal rod is movably sleeved in the sleeve, and a groove is provided at the end of the needle withdrawal rod sleeved in the sleeve.

2. The hand-cranked insulin needle ejector according to claim 1, characterized in that: The sleeve is in a truncated cone shape.

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