Injection device and injection pen

Abstract

An injection pen comprises a housing, a moving part movably arranged in the housing, a toggle switch arranged at one of the housing and the moving part, and a trigger assembly arranged at the other of the housing and the moving part, wherein the toggle switch has a movable lever, the lever can be triggered to move to at least two different positions, and the moving part is configured to be able to trigger the lever to move to the at least two different positions by the trigger assembly when moving relative to the housing, so that the toggle switch generates a corresponding signal. Through the mechanical contact between the toggle switch and the trigger assembly, the toggle switch can be switched between an on state and a off state to determine whether various states are actually executed. Thereby, the detection accuracy and reliability can be improved. The present invention also provides an injection device having an injection pen.

Description

Technical Field

[0001] The present invention relates to an injection device, in particular to an injection device and an injection pen for injecting medicine into a human body. Background Art

[0002] Existing smart injection pens have a detection function to determine whether various states during use are actually executed. However, existing smart injection pens have the defect of inaccurate detection, so there may be situations of non-detection or false detection, resulting in poor detection reliability. Summary of the invention

[0003] An object of the present invention is to provide an injection pen that overcomes at least one disadvantage of the background art.

[0004] The purpose of the present invention and the background technical problem to be solved are achieved by adopting the following technical scheme. According to the injection pen proposed in the present invention, it includes a shell, a moving part movably arranged in the shell, a toggle switch arranged on one of the shell and the moving part, and a touch component arranged on the other of the shell and the moving part. The toggle switch has a movable lever, and the lever can be touched to move to at least two different positions. The moving part is configured to be able to move relative to the shell and the touch component can trigger the lever to move to the at least two different positions, so that the toggle switch generates a corresponding signal.

[0005] In the injection pen of the present invention, the trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. When the movable member is arranged to move from an initial position to a predetermined position along a retracted direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from it.

[0006] In the injection pen of the present invention, the trigger assembly includes a trigger protrusion for triggering and abutting the lever, and when the movable member is configured to move from a predetermined position to a retracted position along a retracted direction, the trigger protrusion first triggers the lever to move to a corresponding one of the positions and then moves and is temporarily positioned at another corresponding position.

[0007] In the injection pen of the present invention, the trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. When the movable member is arranged to move from the retracted position to the initial position along the extended direction, the trigger protrusion will first trigger the lever to move to the position in sequence and then pass over the lever and separate from it.

[0008] In the injection pen of the present invention, the toggle switch is arranged on the housing, and the positions are respectively a first position and a second position. The touch assembly includes a first touch protrusion arranged on the moving member and capable of moving with the moving member. The first touch protrusion is used to touch the lever and can pass over the lever. When the moving member is arranged to move from an initial position to a predetermined position along a retracting direction, the first touch protrusion will first touch the lever to move to the first position and the second position in sequence and then pass over the lever and separate from it.

[0009] In the injection pen of the present invention, the trigger assembly further comprises a second trigger protrusion which is arranged on the movable member and can move with the movable member, the first trigger protrusion and the second trigger protrusion are spaced apart along the length direction of the shell, the second trigger protrusion is used to trigger and abut the lever, and the movable member is arranged such that when the movable member moves from the predetermined position along the retracted direction to the retracted position, the second trigger protrusion will first trigger the lever to move to the first position and then move and be temporarily positioned at the second position.

[0010] In the injection pen of the present invention, the lever can also be touched by the first touching protrusion to move to a third position and a fourth position, the first position is between the second position and the third position, and the third position is between the first position and the fourth position. The movable member is configured such that when it moves from the retracted position to the initial position along an extending direction opposite to the retracted direction, the second touching protrusion will first separate from the lever, and then the first touching protrusion will first touch the lever to move to the third position and the fourth position in sequence and then pass over the lever and separate from it.

[0011] In the injection pen of the present invention, the first touch convex portion has a first pushing arc surface, a pushing inclined surface and a first thickness, the first pushing arc surface is used to push the lever to make it swing along the first swing direction to the first position and the second position, the pushing inclined surface is opposite to the first pushing arc surface and is used to push the lever to make it swing along the second swing direction opposite to the first swing direction to the third position and the fourth position, the second touch convex portion has a second pushing arc surface and a second thickness, the second pushing arc surface faces the pushing inclined surface and is used to push the lever to make it swing along the first swing direction to the first position and the second position, and the second pushing arc surface is used to push the lever to temporarily position it at the second position, and the second thickness is greater than the first thickness.

[0012] In the injection pen of the present invention, the lever can swing between the original position and the position, and the lever is configured to automatically reset from the corresponding position to the original position when separated from the trigger component. When the lever is in the original position, the toggle switch does not generate a signal.

[0013] In the injection pen of the present invention, the toggle switch is arranged on the shell, the touch assembly includes a first touch protrusion arranged on the moving member and capable of moving with the moving member, the first touch protrusion is used to touch the lever and can go over the lever, the injection pen further includes a push member capable of driving the moving member to move, and a locking member movably arranged in the shell, the push member has a first ratchet, the locking member is used to engage with the first ratchet, when the push member moves from an initial position to a retracted position along a retracted direction, the first touch protrusion is adjacent to the lever and does not touch the lever, the locking member engages with the first ratchet to lock the push member in the retracted position.

[0014] In the injection pen of the present invention, the push member further has a second ratchet connected to one end of the first ratchet. When the push member moves from the retracted position to a predetermined position along the retracted direction, the first actuating protrusion first actuates the lever to move to the position in sequence and then passes over the lever and separates from it, and the locking member is engaged with the second ratchet.

[0015] The injection pen of the present invention, the trigger assembly also includes a second trigger protrusion arranged on the moving member and capable of moving with the moving member to trigger and abut against the lever, the moving member is arranged so that when the moving member moves from the predetermined position along the retracted direction to the retracted position, the second trigger protrusion will first trigger the lever to move to a corresponding one of the positions and then move and temporarily position at another corresponding position, the injection pen also includes an unlocking member movably arranged in the shell, and a button rotatably pivoted to the shell, when the moving member is at the predetermined position, the unlocking member is blocked by the moving member so that the unlocking member can block the button, and the pushing member is at the predetermined position, when the moving member is at the retracted position, the unlocking member is not blocked by the moving member, so that the button can be pressed and the locking member is driven to move away from the second ratchet by the unlocking member.

[0016] The injection pen of the present invention has a housing formed with an accommodating space and a receiving space, the movable part is arranged in the accommodating space, and the trigger component is arranged on the movable part. The injection pen also includes a circuit board assembly arranged in the receiving space, a sealing gasket arranged in the housing, and a flexible circuit board. The flexible circuit board has a connecting plate portion passing through the sealing gasket, and a first plate portion and a second plate portion respectively connected to opposite ends of the connecting plate portion. The first plate portion is located in the receiving space and is electrically connected to the circuit board assembly, and the second plate portion is located in the accommodating space and is electrically connected to the toggle switch.

[0017] The injection pen of the present invention further includes a supporting plate located in the accommodating space and fixedly connected to the shell, the second plate portion is adhered to the supporting plate, the supporting plate is formed with two positioning holes, the second plate portion is formed with two through holes respectively connected to the positioning holes, the toggle switch has two positioning bosses, each of the positioning bosses is penetrated through the corresponding through hole and locked in the corresponding positioning hole.

[0018] Another object of the present invention is to provide an injection device that overcomes at least one disadvantage of the background art.

[0019] The purpose of the present invention and the background technical problem to be solved are achieved by adopting the following technical scheme. According to the injection device proposed in the present invention, it includes a detachable medicine box and an injection pen. The injection pen includes a shell for inserting the medicine box, a moving part movably arranged in the shell for connecting the medicine box, a toggle switch arranged on one of the shell and the moving part, and a trigger component arranged on the other of the shell and the moving part. The toggle switch has a movable lever, and the lever can be triggered to move to at least two different positions. When the medicine box links the moving part to move relative to the shell, the trigger component can trigger the lever to move to the at least two different positions, so that the toggle switch generates a corresponding signal.

[0020] In the injection device of the present invention, the trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever, and the movable member is configured such that when it moves from an initial position along a retracted direction to a predetermined position, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from the lever, so that the injection device is in a loading state in which the injection pen is loaded with the drug cartridge.

[0021] In the injection device of the present invention, the trigger assembly includes a trigger protrusion for triggering and pressing against the lever, and when the movable member is arranged to move from a predetermined position to a retracted position along a retracted direction, the trigger protrusion will first trigger the lever to move to a corresponding one of the positions and then move and temporarily position at another corresponding position, so that the injection device is in a pre-pressing completion state in which the medicine magazine pre-presses the skin.

[0022] In the injection device of the present invention, the trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever, and the movable member is configured so that when it moves from the retracted position to the initial position along the extended direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from the lever, so that the injection device is in a disassembly state in which the drug magazine extends out of the injection pen.

[0023] The purpose of the present invention and the background technical problem to be solved are achieved by adopting the following technical scheme. According to the injection device proposed in the present invention, it includes a detachable medicine box and an injection pen. The injection pen includes a shell for inserting the medicine box, a moving part movably arranged in the shell, and a toggle switch arranged on one of the shell and the moving part. The toggle switch has a movable lever. After the medicine box is inserted into the shell, it can link the moving part to move relative to the shell and trigger the lever to move to different positions, so that the toggle switch generates a corresponding signal.

[0024] The beneficial effect of the present invention is that the toggle switch can be switched between the on state and the off state by mechanical contact between the toggle switch and the first and second touch convex parts of the touch assembly to determine whether various states are actually executed, thereby improving the detection accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective exploded view of an embodiment of the injection device of the present invention, illustrating the assembly relationship between a detachable medicine box and an injection pen;

[0026] Figure 2 is along Figure 1 An exploded cross-sectional view taken along the II-II line;

[0027] Figure 3 is along Figure 1 An exploded cross-sectional view taken along line III-III in FIG.

[0028] Figure 4 is a three-dimensional exploded view of the injection pen of this embodiment;

[0029] Figure 5 is an incomplete three-dimensional exploded view of the injection pen of this embodiment;

[0030] Figure 6 is an incomplete cross-sectional view of the injection pen of this embodiment;

[0031] Figure 7 is a side view of the toggle switch of this embodiment;

[0032] Figure 8 is an incomplete three-dimensional exploded view of the injection pen of this embodiment;

[0033] Fig. 9 is along Figure 1 An incomplete cross-sectional view taken along the line IX-IX in FIG.

[0034] Fig.10 is a step flow chart of the method of using this embodiment;

[0035] Fig.11 is a digital signal waveform diagram of the toggle switch of the present embodiment;

[0036] Fig.12 is a cross-sectional view of this embodiment;

[0037] Figures 13 to 15 is an incomplete cross-sectional view of this embodiment;

[0038] Fig.16 is a cross-sectional view of this embodiment;

[0039] Figure 17 to Figure 18 is an incomplete cross-sectional view of this embodiment;

[0040] Fig.19 is a cross-sectional view of this embodiment;

[0041] Figure 20 to Figure 24 is an incomplete cross-sectional view of this embodiment;

[0042] Figure 25 to Figure 27 is a cross-sectional view of this embodiment; and

[0043] Figures 28 to 30 It is an incomplete cross-sectional view of this embodiment. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0045] Before the present invention is described in detail, it should be noted that similar elements are denoted by the same reference numerals in the following description.

[0046] See also Figure 1 , Figure 2 and Figure 3 , is an embodiment of the injection device 100 of the present invention, comprising a detachable medicine box 1 and an injection pen 2.

[0047] The medicine box 1 is detachably assembled in the injection pen 2 and comprises a box shell 11, a sleeve 12, a syringe 13, and an end cap 14. The box shell 11 is in the shape of a hollow long shell and extends along a length direction D1. The box shell 11 has a head end 111, a tail end 112, and two buckle parts 113. The head end 111 and the tail end 112 are spaced apart along the length direction D1. The two buckle parts 113 are spaced apart along a first transverse direction D2 perpendicular to the length direction D1 and are adjacent to the tail end 112. The sleeve 12 is sleeved on the box shell 11 and can slide relative to the box shell 11 along the length direction D1. The syringe 13 has a syringe 131 arranged in the box shell 11 for accommodating medicine (not shown), a needle 132 arranged at the head end of the syringe 131, and a plunger 133 arranged in the syringe 131. The syringe 13 can move relative to the cartridge case 11 along the length direction D1 so that the needle 132 protrudes out of the head end 111 of the cartridge case 11. The end cover 14 is detachably sleeved on the cartridge case 11 to cover the head end 111.

[0048] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 The injection pen 2 includes a shell 3, a circuit board assembly 4, a sensor assembly 5, a push mechanism 6, a locking assembly 7, and a button 8. The shell 3 is in the shape of a long shell and extends along the length direction D1 and includes a shell 31 and a cover 32. The shell 31 is formed with a receiving space 310, an opening 311 that connects the receiving space 310 with the external environment, and a mounting groove 312 that connects the receiving space 310 with the external environment. The opening 311 is located at the head end of the shell 31, and the medicine box 1 can be inserted into the receiving space 310 through the opening 311. The mounting groove 312 is located on one side of the shell 31 and away from the opening 311. The shell 31 has a rear wall 313 opposite to the opening 311, two limit blocks 314 arranged in the receiving space 310, and two guide pillars 315 arranged in the receiving space 310. The two limit blocks 314 are spaced apart along a second transverse direction D3 and are adjacent to the opening 311. The second transverse direction D3 is perpendicular to the length direction D1 and the first transverse direction D2. The two guide pillars 315 are spaced apart along the first transverse direction D2 and are adjacent to the tail wall 313. Each guide pillar 315 extends along the second transverse direction D3. The cover body 32 is disposed outside the shell 31 and defines a receiving space 33 together with the shell 31. The receiving space 33 is spaced apart from the accommodating space 310 along the second transverse direction D3 and is connected through the mounting groove 312.

[0049] The circuit board assembly 4 is disposed in the receiving space 33 of the housing 3 and includes a circuit board 41 . The circuit board 41 is fixedly disposed on the housing 31 .

[0050] See also Figure 4 , Figure 5 and Figure 6, the sensing assembly 5 includes a sealing gasket 51, a carrier plate 52, a flexible circuit board 53, and a toggle switch 54. The sealing gasket 51 is made of an elastic material such as rubber and can be fixed in the mounting groove 312 by, for example, bonding. The sealing gasket 51 is formed with a through hole 511 that communicates with the accommodating space 310 and the receiving space 33. The carrier plate 52 is located in the accommodating space 310 and is fixedly connected to the housing 31 by, for example, bonding. The carrier plate 52 is formed with two positioning holes 521 spaced apart along the second transverse direction D3. The flexible circuit board 53 has a connecting plate portion 531, and a first plate portion 532 and a second plate portion 533 respectively connected to the opposite ends of the connecting plate portion 531. The connecting plate portion 531 extends along the second transverse direction D3 and penetrates the through hole 511 of the sealing gasket 51. The first plate portion 532 is perpendicular to the connecting plate portion 531, is located in the receiving space 33, and is electrically connected to the circuit board 41 of the circuit board assembly 4. The second plate portion 533 is located in the accommodating space 310 and is fixed to the supporting plate 52. The second plate portion 533 is formed with two through holes 534 respectively communicating with the two positioning holes 521.

[0051] See also Figure 5 , Figure 6 and Figure 7The toggle switch 54 has a housing 541, a plurality of terminals 542, and a lever 543. The housing 541 has two positioning bosses 544 spaced apart along the second transverse direction D3, each positioning boss 544 is inserted into a corresponding through hole 534 and locked in a corresponding positioning hole 521. In this way, the toggle switch 54 can be firmly fixed to the carrier board 52 without rotating relative to the carrier board 52 or the flexible circuit board 53. A portion of each terminal 542 protrudes out of the housing 541 and is electrically connected to the second plate portion 533 of the flexible circuit board 53. The lever 543 is movably connected to the housing 541 and a portion of it protrudes out of the housing 541. The lever 543 can be moved to at least two different positions by being triggered. In this embodiment, the toggle switch 54 is a swing-type toggle switch as an example, and the lever 543 is swingably pivoted to the housing 541. The lever 543 is constantly kept at an original position P0 by an elastic force applied to the lever 543 by a spring (not shown) disposed in the housing 541. The lever 543 extends along the second lateral direction D3 when in the original position P0. The lever 543 can be triggered to swing to four different positions, namely a first position P1, a second position P2, a third position P3 and a fourth position P4. The original position P0 is between the first position P1 and the third position P3, the first position P1 is between the original position P0 and the second position P2, and the third position P3 is between the original position P0 and the fourth position P4. The lever 543 can swing from the original position P0 to the first position P1 or the second position P2 along a first swing direction R1, and the lever 543 can swing from the original position P0 to the third position P3 or the fourth position P4 along a second swing direction R2 opposite to the first swing direction R1. When the lever 543 is at the original position P0, the toggle switch 54 is in the OFF state and does not generate any signal. When the lever 543 is at the first position P1, the second position P2, the third position P3 or the fourth position P4, the toggle switch 54 is in the ON state and can generate a corresponding signal.

[0052] By disposing the flexible circuit board 53, the circuit board assembly 4 and the toggle switch 54 respectively located in the receiving space 33 and the receiving space 310 can be electrically connected through the flexible circuit board 53. By disposing the sealing gasket 51, the receiving space 33 can be kept sealed to prevent foreign matter such as water or dust in the receiving space 310 from entering the receiving space 33 and affecting the circuit board assembly 4. By supporting the flexible circuit board 53 and the toggle switch 54 on the supporting plate 52, the second plate portion 533 of the flexible circuit board 53 and the toggle switch 54 can be firmly fixed in the receiving space 310.

[0053] Although the present embodiment takes the slide switch 54 as an example in which it is indirectly disposed in the housing 31 of the housing 3 through the flexible circuit board 53 and the carrier board 52, the present invention is not limited thereto. In other implementations of the present embodiment, the slide switch 54 may also be directly embedded in the housing 31 of the housing 3 and electrically connected to the flexible circuit board 53 through a wire.

[0054] See also Figure 2 , Figure 3 , Figure 4 and Figure 8 The push mechanism 6 is disposed in the accommodating space 310 of the housing 3 and includes a moving member 61, a trigger assembly 62, a spring 63, a push member 64, a spring assembly 65, and a push frame 66. The moving member 61 can move relative to the housing 3 along the length direction D1 and has a sleeve 610 and two side guide frames 611, 611'. The two side guide frames 611, 611' are respectively connected to the two opposite sides of the sleeve 610 and protrude from the head end of the sleeve 610. The two side guide frames 611, 611' are spaced apart along the first transverse direction D2 and define a guide groove 612 together with the sleeve 610. Each side guide frame 611, 611' has a buckle arm 613 and a stop block 614 spaced apart along the length direction D1. The buckle arm 613 is adjacent to the opening 311 of the housing 3 and is used to buckle with the corresponding buckle portion 113 of the medicine box 1. The stopper 614 is away from the opening 311 of the housing 3. The side guide frame 611' has a long plane 615, and the long direction of the long plane 615 extends along the length direction D1.

[0055] See also Figure 7 , Figure 8 and Fig. 9 , the touch assembly 62 includes a first touch protrusion 621 and a second touch protrusion 622. The first touch protrusion 621 and the second touch protrusion 622 are disposed on the moving member 61 and are spaced apart along the length direction D1 and can move with the moving member 61 to touch the toggle lever 543 of the toggle switch 54. In the present embodiment, the first touch protrusion 621 and the second touch protrusion 622 are integrally convexly disposed on the long plane 615 of the side guide frame 611' of the moving member 61, thereby enabling the touch assembly 62 and the moving member 61 to be manufactured by integral molding, thereby improving the convenience of manufacturing. The first touch protrusion 621 is adjacent to the sleeve 610 and away from the opening 311 of the housing 3. The first touch protrusion 621 has a first push arc surface 623 and a push inclined surface 624 spaced apart along the length direction D1. The first push arc surface 623 faces the tail wall 313 (such as Figure 2The first actuating protrusion 621 has a first thickness T1 along the second transverse direction D3. The second actuating protrusion 622 is away from the sleeve 610 and adjacent to the opening 311 of the housing 3. The second actuating protrusion 622 has a second thickness T2 along the second transverse direction D3. The second actuating protrusion 622 has a second thickness T2 along the second transverse direction D3. The second actuating protrusion 622 has a second thickness T2 along the second transverse direction D3. The second thickness T2 is greater than the first thickness T1. The second actuating protrusion 622 has a second actuating arc surface 625 facing the actuating inclined surface 624. The second actuating arc surface 625 has a first arc surface segment 626 connected to the long plane 615, and a second arc surface segment 627 connected to an end of the first arc surface segment 626 opposite to the long plane 615. The first arc surface segment 626 is used to actuate the lever 543 to make it swing along the first swing direction R1 to the first position P1. The second arc surface segment 627 is used to actuate the lever 543 to make it swing along the first swing direction R1 from the first position P1 to the second position P2, and the second arc surface segment 627 is used to actuate the lever 543 to temporarily position it at the second position P2. The actuating inclined surface 624 of the first actuating protrusion 621, the second actuating arc surface 625 of the second actuating protrusion 622, and the long plane 615 together define a receiving groove 628 for receiving the lever 543.

[0056] See also Figure 2 , Figure 3 , Figure 7 and Fig. 9 The moving member 61 can be in an initial position (such as Figure 2 , 3 As shown), a predetermined position (such as Fig.16 ), and a retracted position (as shown Fig.21The predetermined position is between the initial position and the retracted position. The moving member 61 is adjacent to the opening 311 of the housing 3 when it is in the initial position. The moving member 61 is away from the opening 311 of the housing 3 when it is in the predetermined position or the retracted position. The moving member 61 is configured to be able to swing the lever 543 through the trigger assembly 62 when it moves relative to the housing 3, so that the lever 543 is temporarily positioned at the first position P1, the second position P2, the third position P3 or the fourth position P4, so that the toggle switch 54 generates a corresponding signal. Specifically, when the moving member 61 moves from the initial position to the predetermined position, the first trigger protrusion 621 will first trigger the lever 543 to swing to the first position P1 and the second position P2 and then separate from the lever 543. When the moving member 61 moves from the predetermined position to the retracted position, the second trigger protrusion 622 triggers the lever 543 to swing to the second position P2 and temporarily position it at the second position P2. When the moving member 61 moves from the retracted position to the initial position, the second actuating protrusion 622 will first separate from the lever 543, and then the first actuating protrusion 621 will actuate the lever 543 to swing to the third position P3 and the fourth position P4 and then separate from the lever 543. The lever 543 of the toggle switch 54 is configured to automatically return to the original position P0 from the corresponding position by the bias of the spring when it is separated from the first actuating protrusion 621 or the second actuating protrusion 622 of the actuating assembly 62.

[0057] The spring 63 is sleeved on the sleeve 610 of the moving member 61 and has two ends respectively abutting against the moving member 61 and the rear wall 313 of the housing 3 to apply elastic force to the moving member 61 toward the opening 311 .

[0058] See also Figure 2 , Figure 3 , Figure 4 and Figure 8The push member 64 is movably disposed in the guide groove 612 of the movable member 61 along the length direction D1 and includes a push rod 640 and a sliding frame 641 fixed to the push rod 640 and slidably connected to the guide groove 612. The push rod 640 has a push head 642, which is used to push the plunger 133 of the syringe 13 to move it toward the needle 132, so that the plunger 133 can squeeze the medicine into the needle 132 and eject it through the needle 132. The push rod 640 is formed with two guide grooves 643 and two grooves 644. The two guide grooves 643 are spaced apart along the second transverse direction D3, and each guide groove 643 extends along the length direction D1. The two grooves 644 are spaced apart along the first transverse direction D2 and are adjacent to the push head 642. The sliding frame 641 has a set of connecting walls 645, two stop arms 646, and two side arms 647. The sleeve wall 645 is sleeved and fixed at the middle position of the push rod 640 to block the head end of the sleeve 610 of the moving member 61. Two abutting arms 646 are respectively connected to the two opposite sides of the sleeve wall 645 and are spaced along the second transverse direction D3 and protrude from the head end of the sleeve wall 645 to respectively abut against the two limit blocks 314 of the housing 3. The two side arms 647 are respectively connected to the other two opposite sides of the sleeve wall 645 and are spaced along the first transverse direction D2. Each side arm 647 protrudes from the head and tail ends of the sleeve wall 645. Each side arm 647 has a rack 648 extending along the length direction D1 on the outside. The rack 648 is spaced from the tail end of the sleeve wall 645 along the length direction D1 and has a first ratchet 649 and a second ratchet 650. The first ratchet 649 is away from the sleeve wall 645. The second ratchet 650 is connected to one end of the first ratchet 649 and is adjacent to the sleeve wall 645. The push member 64 can be in an initial position (such as Figure 2 , 3 As shown), a retracted position (as shown Fig.12 ), and a predetermined position (as shown Fig.16 The retracted position is between the initial position and the predetermined position. The push member 64 is adjacent to the opening 311 of the housing 3 when in the initial position. The push member 64 is away from the opening 311 of the housing 3 when in the retracted position or the predetermined position.

[0059] The spring assembly 65 is sleeved on the pushing rod 640 of the pushing member 64 and has two ends respectively abutting against the rear end of the sleeve wall 645 and the rear wall 313 of the housing 3 to apply elastic force to the pushing member 64 toward the opening 311 .

[0060] The push frame 66 is movably sleeved on the push rod 640 and abutted by the guide frames 611, 611' on both sides of the movable member 61. The push frame 66 has two sliding parts 661, two buckle parts 662, and two push parts 663. The two sliding parts 661 are spaced apart along the second transverse direction D3 and are slidably connected to the two guide grooves 643 respectively. The two buckle parts 662 are spaced apart along the first transverse direction D2 and are respectively buckled in the two grooves 644, so that the push frame 66 is positioned at a position spaced apart from the push head 642. The two push parts 663 are spaced apart along the second transverse direction D3 to push the sliding sleeve 12 and the syringe 13 of the medicine box 1 to make them move relative to the box shell 11.

[0061] The locking assembly 7 is disposed in the accommodating space 310 of the housing 3 and adjacent to the rear wall 313. The locking assembly 7 includes a locking member 71, an unlocking member 72, and two springs 73. The locking member 71 is covered on the push mechanism 6 and has a first arc wall 711 and two first side walls 712 respectively connected to two opposite sides of the first arc wall 711 and spaced apart along the first transverse direction D2. The two first side walls 712 are respectively sleeved on the two guide posts 315 and can move along the extension direction of the guide posts 315. Each first side wall 712 has a locking hook 713 on the inner side thereof, and the locking hook 713 is used to engage with the first ratchet 649 or the second ratchet 650 of the corresponding rack 648 of the push member 64 to lock the push member 64. The locking hook 713 has an inclined surface 714, and the inclined surface 714 is used for the first ratchet 649 or the second ratchet 650 to contact and push. The locking member 71 can be in a first locking position (eg Fig.13 As shown), a second locking position (as shown Fig.17 ) and an unlocked position (as shown Fig.24 When the locking member 71 is in the first locking position, the locking hook 713 engages the first ratchet 649 of the corresponding rack 648 to lock the push member 64. When the locking member 71 is in the second locking position, the locking hook 713 engages the second ratchet 650 of the corresponding rack 648 to lock the push member 64. When the locking member 71 is in the unlocking position, the locking hook 713 can release the first ratchet 649 or the second ratchet 650 to release the locking state of the push member 64.

[0062] The unlocking member 72 is covered on the pushing mechanism 6 and has a second arc wall 721, and two second side walls 722 respectively connected to the two opposite sides of the second arc wall 721 and spaced apart along the first transverse direction D2. The second arc wall 721 abuts against the first arc wall 711. The two second side walls 722 are respectively sleeved on the two guide posts 315 and can move along the extending direction of the guide posts 315. Each second side wall 722 has a stop block 723 on the inner side, and the stop block 723 and the locking hook 713 are spaced apart along the length direction D1. The stop block 723 is used to abut against the corresponding stop block 614 of the moving member 61 so as to be stopped by the corresponding stop block 614, thereby preventing the unlocking member 72 from moving along the guide post 315. A guide groove 724 and an avoidance groove 725 are formed on the inner side of each second side wall 722. The guide groove 724 extends along the length direction D1 and is located on a side of the stop block 723 opposite to the second arc wall 721. The guide groove 724 is used to guide the movement of the corresponding stop block 614. The avoidance groove 725 is between the stop block 723 and the locking hook 713 and communicates with the guide groove 724. The avoidance groove 725 extends along the second transverse direction D3 to accommodate the corresponding stop block 614.

[0063] The button 8 is rotatably pivoted to the housing 31 of the casing 3 and abuts against the second arc wall 721 of the unlocking member 72. A portion of the button 8 is exposed from the housing 31 for pressing to drive the unlocking member 72 and the locking member 71 to move along the guide column 315.

[0064] When each of the stop blocks 614 of the moving member 61 is located in the corresponding guide groove 724 of the unlocking member 72 and blocks the corresponding stop block 723, the unlocking member 72 is in a blocked state (eg Fig.13 , 14 As shown in FIG. 1 ), the second arc-shaped wall 721 of the unlocking member 72 can block the button 8 to prevent the button 8 from being pressed by mistake and rotating relative to the housing 3. When each stop block 614 of the moving member 61 is located in the corresponding avoidance groove 725 of the unlocking member 72 and does not block the corresponding stop block 723, the unlocking member 72 is in an unblocked state (as shown in FIG. 1 ). Fig. 22 As shown), the button 8 can be pressed to rotate relative to the housing 3.

[0065] The two springs 73 are respectively sleeved on the two guide pillars 315 , and two ends of each spring 73 respectively abut against the shell 31 of the housing 3 and the corresponding first side wall 712 to apply elastic force to the locking member 71 in a direction away from the pushing mechanism 6 .

[0066] See also Figure 2 , Figure 3 and Figure 8Before the medicine cartridge 1 is assembled to the injection pen 2, the spring assembly 65 exerts an elastic force on the push member 64, so that the push member 64 is positioned at the initial position where the two stop arms 646 respectively stop against the two limit blocks 314 of the housing 3. The spring 63 exerts an elastic force on the moving member 61, so that the moving member 61 is positioned at the initial position where the sleeve 610 stops against the sleeve wall 645 of the push member 64. The spring 73 exerts an elastic force on the locking member 71, so that the locking member 71 is positioned at the position where the first arcuate wall 711 stops against the second arcuate wall 721, and the unlocking member 72 abutting against the locking member 71 is positioned at the position where the second arcuate wall 721 stops against the housing 31 and the button 8.

[0067] The following is a detailed description of the method of using the injection device 100:

[0068] Fig.10 1 is a step flow chart of the method of using the injection device 100 of the present embodiment, comprising the following steps: step S1: loading the drug cartridge into the injection pen, step S2: pre-pressing the skin, step S3: injecting the drug, and step S4: removing the drug cartridge.

[0069] Fig.11 3 is a digital signal waveform diagram of the toggle switch 54 of the present embodiment during use of the injection device 100, which includes a first unsensed section US1, a first sensing section SS1, a second unsensed section US2, a second sensing section SS2, a third unsensed section US3, a third sensing section SS3, and a fourth unsensed section US4.

[0070] See also Fig.10 , Fig.12 and Fig.13In step S1, the tail end 112 of the medicine box 1 is first aligned with the opening 311 of the injection pen 2. Then, the medicine box 1 is inserted into the opening 311 along a retraction direction D11 parallel to the length direction D1, so that the medicine box 1 extends into the accommodating space 310 through the opening 311. During the movement of the medicine box 1 along the retraction direction D11, the two buckle parts 113 will first push the two buckle arms 613 of the moving member 61 outward respectively, so that the two buckle arms 613 are then buckled into the two buckle parts 113 respectively. Afterwards, the tail end 112 of the cartridge housing 11 will push the side guide frames 611, 611' of the moving member 61 to move, and the moving member 61 will compress the spring 63 during the movement to deform it and accumulate the reset elastic force. At the same time, the plunger 133 of the syringe 13 will push the push head 642 of the push member 64 to move, and the push member 64 will compress the spring assembly 65 during the movement to deform it and accumulate the reset elastic force. Then, the first ratchet tooth 649 of the rack 648 of each side arm 647 will contact and push the inclined surface 714 of the corresponding locking hook 713 of the locking member 71. The component force applied by the first ratchet tooth 649 to the inclined surface 714 will prompt the locking member 71 to move toward the spring 73 and compress the spring 73 to deform it and accumulate the restoring elastic force.

[0071] When the first ratchet 649 of each side arm 647 passes over the corresponding locking hook 713, the restoring elastic force accumulated by the spring 73 rebounds the locking member 71, so that the locking member 71 moves to the first locking position where the locking hook 713 is engaged with the first ratchet 649, thereby locking the push member 64 in place. Fig.12 At the same time, each stopper 614 of the moving member 61 moves into the corresponding guide groove 724 and stops the corresponding stopper 723, so that the unlocking member 72 is in a stopped state. Figure 2 As shown in the figure, the locking member 71 is mistakenly pressed and the unlocking member 72 drives the locking member 71 to move away from the first locking position.

[0072] See also Fig.11 , Fig.12 and Fig.14 Since the sleeve 610 of the moving member 61 is stopped by the sleeve wall 645 of the pushing member 64, when the pushing member 64 is positioned at the retracted position, the moving member 61 is also positioned at the position as shown in FIG. Fig.12 At this time, the first push arc surface 623 of the first trigger protrusion 621 of the trigger component 62 is adjacent to the lever 543 of the toggle switch 54 and just contacts the lever 543. Since the lever 543 has not been triggered and is located at the original position P0, the toggle switch 54 is in the closed state with the digital signal being 0, and the waveform of the digital signal is in the first unsensed section US1.

[0073] See also Fig.11 , Fig.12 , Fig.13 and Fig.15When the medicine box 1 continues to move along the retracting direction D11 and drives the moving member 61 and the pushing member 64 to move, the second ratchet 650 of the rack 648 of each side arm 647 will contact and push the inclined surface 714 of the corresponding locking hook 713 of the locking member 71. The component force applied by the second ratchet 650 to the inclined surface 714 will cause the locking member 71 to move toward the spring 73 and compress the spring 73 to deform and accumulate the restoring elastic force, so that the locking hook 713 moves away from the first locking position and moves toward the unlocking position. At the same time, the first pushing arc surface 623 of the first contact protrusion 621 of the contact assembly 62 pushes the lever 543 to swing the lever 543 along the first swing direction R1 to the first position P1. The first contact protrusion 621 pushes the lever 543 through the first pushing arc surface 623 to increase the uniformity of the force applied to the lever 543, so that the lever 543 can swing smoothly along the first swing direction R1 to the first position P1. At this time, the toggle switch 54 is switched from the closed state to the open state and generates a signal, so that the digital signal is transformed from 0 to 1 and the waveform is transformed to the first sensing section SS1. Figure 2 When a controller (not shown) of the injection device 100 receives a signal generated by the toggle switch 54, the injection device 100 is in a sensing state ST1, and the injection pen 2 of the injection device 100 switches from a dormant state to a working state.

[0074] See also Fig.11 , Fig.16 , Fig.17 and Fig.18 When the medicine box 1 continues to move along the retracting direction D11 and drives the moving member 61 and the pushing member 64 to move, the second ratchet teeth 650 of the rack 648 of each side arm 647 will move away from the corresponding locking hook 713 in the unlocking position, and the first pushing arc surface 623 of the first actuating protrusion 621 of the actuating assembly 62 will push the lever 543 of the toggle switch 54 to rotate it to the second position P2 (such as Figure 7 As shown). When the second ratchet 650 passes over the corresponding locking hook 713 in the unlocked position, the restoring elastic force accumulated by the spring 73 rebounds the locking member 71, so that the locking member 71 moves to the second locking position where the locking hook 713 engages with the second ratchet 650, so as to lock the push member 64 in the predetermined position, and the moving member 61 is positioned in the predetermined position. At the same time, the first touch protrusion 621 passes over the lever 543 in the second position P2, so that the lever 543 is accommodated in the accommodating groove 628. The elastic force applied by the spring to the lever 543 causes the lever 543 to swing along the second swinging direction R2 and reset to the original position P0. At this time, the toggle switch 54 switches from the on state to the off state without generating a signal, so that the digital signal is converted from 1 to 0 and the waveform is converted to the second unsensed section US2. Circuit board assembly 4 (as shown Figure 2When the controller (not shown) of the injection pen 2 does not receive the signal generated by the toggle switch 54, it means that the loading of the medicine cartridge 1 is completed and the injection device 100 is in a loading state ST2 in which the injection pen 2 is loaded with the medicine cartridge 1.

[0075] See also Fig.10 , Fig.17 , Fig.18 and Fig.19 Then, step S2 is performed, firstly, the end cover 14 (such as Fig.16 The cartridge case 11 is detached from the cartridge case 11, and the injection device 100 is moved to the user's skin 9 so that the head end 111 of the cartridge case 11 contacts the skin 9. Fig.16 The outer wall surface of the rear wall 313 of the housing 3 of the injection pen 2 is pressed in the extension direction D12 (shown in FIG. 1 ). Since the head end 111 of the cartridge housing 11 contacts the skin 9, and the side guide frames 611, 611' of the moving member 61 abut against the rear end 112 of the cartridge housing 11, during the process of pressing the rear wall 313 of the housing 3, the cartridge housing 11 and the moving member 61 remain fixed, and the housing 3 moves relative to the cartridge housing 11 and the moving member 61.

[0076] During the movement of the housing 3 along the extension direction D12, the rear wall 313 pushes the push member 64 through the spring assembly 65, so that the push head 642 is inserted into the plunger 133 of the syringe 13. The push rod 640 of the push member 64 drives the push frame 66 to move, so that the push frame 66 pushes the sliding sleeve 12 and the syringe 13 to move relative to the cartridge case 11. In this way, the needle 132 can approach the skin 9. During the movement of the housing 3, the circuit board assembly 4, the sensor assembly 5, the locking assembly 7 and the button 8 are driven to move at the same time, so that the lever 543 of the toggle switch 54 gradually approaches the second push arc surface 625 of the second actuating protrusion 622, and each guide groove 724 of the unlocking member 72 gradually moves away from the corresponding stop block 614 and each avoidance groove 725 gradually approaches the corresponding stop block 614.

[0077] See also Fig.11 , Fig.19 and Fig. 20 When the housing 3 moves a predetermined distance to Fig.19 When the toggle switch 54 is in the position shown, the lever 543 of the toggle switch 54 contacts the first arc segment 626 of the second push arc surface 625 and is pushed by the first arc segment 626, so that the lever 543 swings along the first swing direction R1 to the first position P1. At this time, the toggle switch 54 switches from the closed state to the open state and generates a signal, so that the digital signal is transformed from 0 to 1 and the waveform is transformed to the second sensing section SS2. The circuit board assembly 4 (such as Figure 2When the controller (not shown) receives the signal generated by the toggle switch 54 again, it means that the injection device 100 is in a sensing state ST3.

[0078] See also Fig.11 , Fig.21 and Fig. 22 When the housing 3 continues to move a predetermined distance to Fig. 22 When the lever 543 of the toggle switch 54 is in the position shown, the lever 543 contacts the second arc segment 627 of the second push arc surface 625 and is pushed by the second arc segment 627, so that the lever 543 swings from the first position P1 to the second position P2 along the first swing direction R1. At this time, the second arc segment 627 pushes against the lever 543 to temporarily position it at the second position P2, so that the toggle switch 54 remains in the on state, and the injection device 100 is in a pre-compression completion state ST4. The second actuating protrusion 622 can increase the uniformity of the force applied to the lever 543 by pushing the lever 543 through the second push arc surface 625, so that the lever 543 can swing smoothly and sequentially to the first position P1 and the second position P2 along the first swing direction R1.

[0079] In addition, the moving member 61 (such as Fig.19 As shown in the figure, when the unlocking member 72 is in the retracted position relative to the housing 3, each guide groove 724 of the unlocking member 72 moves away from the corresponding stop block 614 and each avoidance groove 725 moves to the corresponding stop block 614 and is accommodated by the corresponding stop block 614, so that the stop block 723 will not be stopped by the corresponding stop block 614, so that the unlocking member 72 is in the unblocked state. By moving the housing 3 along the extension direction D12 by the aforementioned predetermined stroke, the unlocking member 72 can be switched from the blocked state to the unblocked state. Therefore, the button 8 can be pressed and the locking member 71 can be unlocked by driving the unlocking member 72.

[0080] See also Fig.23 and Fig.24 Then, step S3 is performed, in which the button 8 is pressed in a pressing direction D31 parallel to the second transverse direction D3, so that the button 8 rotates relative to the housing 31 of the housing 3. During the rotation of the button 8, the second arcuate wall 721 of the unlocking member 72 is pressed downward, so that the unlocking member 72 moves along the guide column 315. During the movement of the unlocking member 72, the first arcuate wall 711 of the locking member 71 is pressed downward by the second arcuate wall 721, so that the locking member 71 moves along the guide column 315 and compresses the spring 73. When the locking member 71 moves to Fig.24 In the unlocked position shown in FIG. 1 , each locking hook 713 of the locking member 71 releases the second ratchet tooth 650 of the corresponding rack 648 to release the locking push member 64 (eg, Fig.19 The locked state is shown.

[0081] See also Fig.11 and Fig.25When the locking state of the push member 64 is released, the restoring elastic force accumulated by the spring assembly 65 will rebound the push member 64 and make the push member 64 move along the extension direction D12. During the movement of the push member 64, the push frame 66 pushes the sliding sleeve 12 and the syringe 13 to move along the extension direction D12. Fig.25 When the syringe 13 moves to the position shown in FIG. Fig.25 When the position shown in FIG. 1 is reached, the needle 132 is inserted into the skin 9 so that the syringe 13 no longer moves. Thus, the pusher frame 66 stops and is positioned at Fig.25 The push rod 640 of the push member 64 will continue to move relative to the push frame 66 and the syringe 131 of the syringe 13, so that the two grooves 644 move away from the two claws 662 respectively, and the push head 642 pushes the plunger 133 to move toward the needle 132. Thereby, the plunger 133 can start to squeeze the medicine into the needle 132 and inject it into the skin 9 through the needle 132. At this time, the injection device 100 is in an injection start state ST5.

[0082] See also Fig.11 and Fig.26 The restoring elastic force accumulated by the spring assembly 65 continues to drive the push member 64 to move along the extension direction D12, so that the plunger 133 continues to squeeze the medicine into the needle 132 and inject it into the skin 9 through the needle 132. Fig.26 When the push head 642 stops at the position of the syringe 131, it is no longer possible to push the plunger 133 to move, so that the push member 64 is positioned at a push completion position (such as the push completion position) between the initial position and the predetermined position and adjacent to the initial position. Fig.26 At this time, the injection device 100 is in an injection end state ST6.

[0083] See also Fig. 9 , Fig.11 and Fig.21 Since the second thickness T2 of the second actuating protrusion 622 is greater than the first thickness T1 of the first actuating protrusion 621, the second arc segment 627 can push against the lever 543 to temporarily position it at the second position P2. In this way, it can be ensured that the injection device 100 can only proceed to step S3 in the pre-pressing completion state ST4. In addition, since the pre-pressing completion state ST4, the injection start state ST5 and the injection end state ST6 are all in the second sensing section SS2, it can be determined whether the injection device 100 has actually completed the operations of step S2 and step S3 by detecting the length of time the toggle switch 54 remains in the on state.

[0084] See also Fig.10 , Fig.11 , Figure 27 to Figure 28Finally, step S4 is performed. After the injection of the injection device 100 is completed, the injection pen 2 is moved along the retracting direction D11. The elastic force applied by the spring assembly 65 to the push member 64 causes the push member 64 to move toward the initial position. The elastic force applied by the spring 63 to the moving member 61 causes the moving member 61 to move along the extending direction D12 and push the sliding sleeve 12 to move relative to the cartridge housing 11, and the second actuating protrusion 622 moves relative to the toggle switch 54. In this way, the medicine cartridge 1 can gradually extend out of the opening 311 and move away from the accommodating space 310. When the housing 3 moves away from the skin 9 for a predetermined distance, the second actuating arc surface 625 of the second actuating protrusion 622 separates from the lever 543. The elastic force applied by the spring to the lever 543 causes the lever 543 to swing along the second swinging direction R2 and return to the original position P0. At this time, the toggle switch 54 switches from the on state to the off state without generating any signal, so that the digital signal changes from 1 to 0 and the waveform changes to the third unsensed section US3. Figure 2 When the controller (not shown) does not receive the signal generated by the toggle switch 54, it means that the injection device 100 is in a removal state ST7 away from the skin 9.

[0085] See also Fig.11 and Fig.29 When the housing 3 continues to move away from the skin 9 for a predetermined distance, the push inclined surface 624 of the first actuating protrusion 621 pushes the lever 543, causing the lever 543 to swing along the second swing direction R2 to the third position P3. At this time, the toggle switch 54 switches from the closed state to the open state and generates a signal, so that the digital signal changes from 0 to 1 and the waveform changes to the third sensing section SS3. The circuit board assembly 4 (such as Figure 2 When the controller (not shown) receives the signal generated by the toggle switch 54 again, it means that the injection device 100 is in a sensing state ST8 in which the drug cartridge 1 is extended and moved away from the injection pen 2.

[0086] See also Fig.11 , Fig.29 and Fig.30 When the housing 3 continues to move away from the skin 9 for a predetermined distance, the pushing inclined surface 624 of the first actuating protrusion 621 continues to push the lever 543, so that the lever 543 swings along the second swing direction R2 to the fourth position P4 (such as Figure 7As shown). The first touch protrusion 621 can increase the uniformity of the force applied to the lever 543 by pushing the lever 543 with the push inclined surface 624, so that the lever 543 can smoothly swing to the third position P3 and the fourth position P4 in sequence along the second swing direction R2. When the housing 3 continues to move away from the skin 9 for a predetermined distance, the first touch protrusion 621 will pass over the lever 543 at the fourth position P4. The elastic force applied to the lever 543 by the spring causes the lever 543 to swing along the first swing direction R1 and reset to the original position P0. At this time, the toggle switch 54 switches from the on state to the off state without generating a signal, so that the digital signal is converted from 1 to 0 and the waveform is converted to the fourth unsensed section US4. Circuit board assembly 4 (as shown Figure 2 When the controller (not shown) of the injection device 100 does not receive the signal generated by the toggle switch 54, it means that the injection device 100 is in a disassembly state ST9 in which the drug cartridge 1 extends out of the injection pen 2.

[0087] See also Figure 3 , when the moving member 61 returns to Figure 3 When the drug cartridge 1 is in the initial position shown, the user can pull the drug cartridge 1 out of the injection pen 2 .

[0088] It should be noted that the injection device 100 of this embodiment may also have the following different implementations depending on the needs:

[0089] In one embodiment, the trigger assembly 62 has only the first trigger protrusion 621 and omits the second trigger protrusion 622. When the medicine box 1 moves the linked moving member 61 from the initial position to the predetermined position or from the retracted position to the initial position, the first trigger protrusion 621 cooperates with the lever 543 to enable the toggle switch 54 to generate a signal.

[0090] In another embodiment, the trigger assembly 62 only has the second trigger protrusion 622 and omits the first trigger protrusion 621. When the medicine box 1 links the movable member 61 to move from the predetermined position to the retracted position, the second trigger protrusion 622 cooperates with the lever 543 to make the toggle switch 54 generate a signal.

[0091] Another embodiment is that the toggle switch 54 is disposed on the moving member 61, the trigger assembly 62 is disposed on the housing 3, and the first trigger protrusion 621 and the second trigger protrusion 622 are disposed along the Fig. 9 The length direction D1 is shown as being reversed, that is, the first actuating protrusion 621 and the second actuating protrusion 622 are respectively adjacent to the opening 311 of the housing 3 and away from the opening 311 of the housing 3 .

[0092] In summary, the injection device 100 of this embodiment, through the mechanical contact between the toggle switch 54 and the first actuating protrusion 621 and the second actuating protrusion 622 of the actuating assembly 62, enables the toggle switch 54 to be switched between the on state and the off state to determine whether various states are actually executed. In this way, the detection accuracy and reliability can be improved, and the purpose of the present invention can be achieved.

Claims

1. An injection pen; Features: The injection pen comprises a housing, a moving part movably arranged in the housing, a toggle switch arranged in the housing, and a trigger assembly arranged in the moving part, the toggle switch has a movable lever, the lever can be triggered to move to at least two different positions, the moving part is configured to be able to trigger the lever to move to the at least two different positions through the trigger assembly when moving relative to the housing, so that the toggle switch generates a corresponding signal; The toggle switch is arranged on the housing, the positions are respectively a first position and a second position, the touch assembly comprises a first touch convex portion arranged on the moving member and capable of moving with the moving member, the first touch convex portion is used to touch the lever and can pass over the lever, and the moving member is arranged such that when the moving member moves from the initial position along the retracting direction to the predetermined position, the first touch convex portion first touches the lever to move to the first position and the second position in sequence and then passes over the lever and separates from the lever; The touch assembly also includes a second touch protrusion arranged on the moving member and capable of moving with the moving member, the first touch protrusion and the second touch protrusion are spaced apart along the length direction of the shell, the second touch protrusion is used to touch and press against the lever, and the moving member is configured such that when the moving member moves from the predetermined position along the retracted direction to the retracted position, the second touch protrusion will first touch the lever to move to the first position and then move and be temporarily positioned at the second position.

2. The injection pen according to claim 1, Features: The trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. When the moving member moves from an initial position to a predetermined position along a retracted direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from it.

3. The injection pen according to claim 1, Features: The trigger assembly includes a trigger protrusion for triggering and abutting the lever. When the movable member moves from a predetermined position to a retracted position along a retracted direction, the trigger protrusion first triggers the lever to move to a corresponding one of the positions and then moves and is temporarily positioned at another corresponding position.

4. The injection pen according to claim 1, Features: The trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. When the moving member moves from the retracted position to the initial position along the extended direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from it.

5. The injection pen according to claim 1, Features: The lever can also be touched by the first touching protrusion to move to a third position and a fourth position, the first position is between the second position and the third position, the third position is between the first position and the fourth position, and the moving member is configured to move from the retracted position to the initial position along an extending direction opposite to the retracted direction, the second touching protrusion will first separate from the lever, and then the first touching protrusion will first touch the lever to move to the third position and the fourth position in sequence and then cross the lever and separate from it.

6. The injection pen according to claim 5, Features: The first touch convex portion has a first pushing arc surface, a pushing inclined surface and a first thickness, the first pushing arc surface is used to push the lever to make it swing along a first swing direction to the first position and the second position, the pushing inclined surface is opposite to the first pushing arc surface and is used to push the lever to make it swing along a second swing direction opposite to the first swing direction to the third position and the fourth position, the second touch convex portion has a second pushing arc surface and a second thickness, the second pushing arc surface faces the pushing inclined surface and is used to push the lever to make it swing along the first swing direction to the first position and the second position, and the second pushing arc surface is used to push the lever to temporarily position it at the second position, and the second thickness is greater than the first thickness.

7. The injection pen according to any one of claims 1 to 6, Features: The lever can swing between the original position and the position. The lever is configured to automatically reset from the corresponding position to the original position when separated from the trigger assembly. When the lever is in the original position, the toggle switch does not generate a signal.

8. The injection pen according to claim 1, Features: The toggle switch is arranged on the housing, the touch assembly includes a first touch protrusion arranged on the moving member and movable with the moving member, the first touch protrusion is used to touch the lever and can go over the lever, the injection pen further includes a push member capable of driving the moving member to move, and a locking member movably arranged in the housing, the push member has a first ratchet, the locking member is used to engage with the first ratchet, when the push member moves from an initial position to a retracted position along a retracted direction, the first touch protrusion is adjacent to the lever and does not touch the lever, the locking member engages with the first ratchet to lock the push member in the retracted position.

9. The injection pen according to claim 8, Features: The pushing member also has a second ratchet connected to one end of the first ratchet. When the pushing member moves from the retracted position to a predetermined position along the retracted direction, the first actuating protrusion first actuates the lever to move to the position in sequence and then passes over the lever and separates from it, and the locking member is engaged with the second ratchet.

10. The injection pen according to claim 9, Features: The trigger assembly also includes a second trigger protrusion arranged on the moving member and capable of moving with the moving member to trigger and abut against the lever. The moving member is arranged so that when the moving member moves from the predetermined position along the retracted direction to the retracted position, the second trigger protrusion will first trigger the lever to move to a corresponding one of the positions and then move and temporarily position at another corresponding position. The injection pen also includes an unlocking member movably arranged in the shell, and a button rotatably pivoted to the shell. When the moving member is at the predetermined position, the unlocking member is blocked by the moving member so that the unlocking member can block the button, and the pushing member is at the predetermined position. When the moving member is at the retracted position, the unlocking member is not blocked by the moving member, so that the button can be pressed and the locking member is driven to move away from the second ratchet by the unlocking member.

11. The injection pen according to claim 1, Features: The shell is formed with an accommodating space and a receiving space, the moving part is arranged in the accommodating space, the trigger component is arranged on the moving part, and the injection pen also includes a circuit board assembly arranged in the receiving space, a sealing gasket arranged in the shell, and a flexible circuit board, the flexible circuit board has a connecting plate portion passing through the sealing gasket, and a first plate portion and a second plate portion respectively connected to opposite ends of the connecting plate portion, the first plate portion is located in the receiving space and is electrically connected to the circuit board assembly, and the second plate portion is located in the accommodating space and is electrically connected to the toggle switch.

12. The injection pen according to claim 11, Features: The injection pen also includes a supporting plate located in the accommodating space and fixedly connected to the housing, the second plate portion is adhered to the supporting plate, the supporting plate is formed with two positioning holes, the second plate portion is formed with two through holes respectively connected to the positioning holes, the toggle switch has two positioning bosses, each of the positioning bosses is penetrated through the corresponding through hole and locked in the corresponding positioning hole.

13. An injection device; Features: The injection device comprises a detachable medicine box and an injection pen, wherein the injection pen comprises a housing for inserting the medicine box, a moving part movably arranged in the housing for connecting the medicine box, a toggle switch arranged on the housing, and a trigger assembly arranged on the moving part, wherein the toggle switch has a movable lever, and the lever can be triggered to move to at least two different positions, and when the medicine box links the moving part to move relative to the housing, the trigger assembly can trigger the lever to move to the at least two different positions, so that the toggle switch generates a corresponding signal. The toggle switch is arranged on the housing, the positions are respectively a first position and a second position, the touch assembly comprises a first touch convex portion arranged on the moving member and capable of moving with the moving member, the first touch convex portion is used to touch the lever and can pass over the lever, and the moving member is arranged such that when the moving member moves from the initial position along the retracting direction to the predetermined position, the first touch convex portion first touches the lever to move to the first position and the second position in sequence and then passes over the lever and separates from the lever; The touch assembly also includes a second touch protrusion arranged on the moving member and capable of moving with the moving member, the first touch protrusion and the second touch protrusion are spaced apart along the length direction of the shell, the second touch protrusion is used to touch and press against the lever, and the moving member is configured such that when the moving member moves from the predetermined position along the retracted direction to the retracted position, the second touch protrusion will first touch the lever to move to the first position and then move and be temporarily positioned at the second position.

14. The injection device according to claim 13, Features: The trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. When the movable member is arranged to move from an initial position to a predetermined position along a retracted direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from the lever, so that the injection device is in a loading state in which the injection pen is loaded with the drug cartridge.

15. The injection device according to claim 14, Features: The trigger assembly includes a trigger protrusion for triggering and pressing against the lever. When the movable member is arranged to move from a predetermined position to a retracted position along a retracted direction, the trigger protrusion first triggers the lever to move to a corresponding one of the positions and then moves and temporarily positions at another corresponding position, so that the injection device is in a pre-pressing completion state of the drug magazine pre-pressing the skin.

16. The injection device according to claim 15, Features: The trigger assembly includes a trigger protrusion for triggering the lever and being able to pass over the lever. The movable member is configured such that when it moves from the retracted position to the initial position along the extended direction, the trigger protrusion first triggers the lever to move to the position in sequence and then passes over the lever and separates from the lever, so that the injection device is in a disassembly state in which the drug magazine extends out of the injection pen.

17. An injection device; Features: The injection device comprises a detachable medicine box and an injection pen, wherein the injection pen comprises a housing for inserting the medicine box, a moving part movably arranged in the housing, and a toggle switch arranged in the housing, wherein the toggle switch has a movable lever, and when the medicine box is inserted into the housing, the moving part can be linked to move relative to the housing and the lever can be triggered to move to different positions, so that the toggle switch generates a corresponding signal; The toggle switch is arranged on the housing, the positions are respectively a first position and a second position, the touch assembly comprises a first touch convex portion arranged on the moving member and capable of moving with the moving member, the first touch convex portion is used to touch the lever and can pass over the lever, and the moving member is arranged such that when the moving member moves from the initial position along the retracting direction to the predetermined position, the first touch convex portion first touches the lever to move to the first position and the second position in sequence and then passes over the lever and separates from the lever; The touch assembly also includes a second touch protrusion arranged on the moving member and capable of moving with the moving member, the first touch protrusion and the second touch protrusion are spaced apart along the length direction of the shell, the second touch protrusion is used to touch and press against the lever, and the moving member is configured such that when the moving member moves from the predetermined position along the retracted direction to the retracted position, the second touch protrusion will first touch the lever to move to the first position and then move and be temporarily positioned at the second position.

Images