Insulin injection pen with easy assembly and recovery

Abstract

The application discloses an insulin injection pen convenient to assemble and recycle, and belongs to the technical field of dosing devices. The insulin injection pen comprises a pen body, a medicine bottle is arranged in the pen body, an adjusting mechanism, a driving mechanism and a positive and negative adjusting wheel. The adjusting mechanism comprises a dose rotating drum, the positive and negative adjusting wheel and a transmission pipe. The dose rotating drum is rotatably connected with the pen body. The positive and negative adjusting wheel is arranged in the dose rotating drum. The transmission pipe is arranged in the pen body. The driving mechanism is assembled in the pen body and is used for pushing a plug in the medicine bottle to move forward and dose. The positive and negative adjusting wheel is integrated with an elastic structure. The transmission pipe is connected with the dose rotating drum through the elastic structure. The insulin injection pen is switched from a dose adjusting state to an injection state through the up and down clutch of the transmission pipe and is injected and dosed through the driving mechanism. The elastic structure integrated with the positive and negative adjusting wheel replaces a metal spring. The product can be composed of plastic parts. The product is convenient to recycle, has high integration degree and reduces the number of parts, cost and assembly procedures.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drug delivery devices, and particularly relates to an insulin injection pen convenient to assemble and recycle. BACKGROUND

[0002] The current insulin injector has a large number of components, and the integration degree of the components is low, resulting in problems of complicated assembly process and high manufacturing cost. In addition, the current insulin injector often contains one or more metal springs, and other components are plastic parts, so that the product recycling is not convenient, and the recycling cost is high. SUMMARY

[0003] The present application is directed to the above problems existing in the prior art, and proposes an insulin injection pen with a small number of components, which is convenient to assemble and recycle.

[0004] The present application can be implemented by the following technical solutions:

[0005] An insulin injection pen convenient to assemble and recycle comprises:

[0006] A pen body, in which a medicine bottle is installed;

[0007] An adjusting mechanism, which comprises a dose drum, a forward and reverse adjusting wheel, and a transmission pipe, the dose drum is rotatably connected with the pen body, the forward and reverse adjusting wheel is arranged in the dose drum, and the transmission pipe is arranged in the pen body;

[0008] A driving mechanism, which is assembled in the pen body and is used for pushing the plug in the medicine bottle to move forward and administer medicine;

[0009] The forward and reverse adjusting wheel is integrated with an elastic structure, the transmission pipe and the dose drum are connected in clutch through the elastic structure, the insulin injection pen is switched from the dose adjusting state to the injection state through the up and down clutch of the transmission pipe, and the driving mechanism is used for injection administration.

[0010] As a further improvement of the present application, the adjusting mechanism further comprises:

[0011] A threaded sleeve, which is assembled in the pen body, the dose drum is screwed with the threaded sleeve, and the threaded sleeve is used for enabling the dose drum to rotate forward and reverse and adjust the medicine dosage;

[0012] An injection button is installed on the forward-reverse adjusting wheel, wherein the forward-reverse adjusting wheel and the injection button are respectively buckled with the dose drum, in the initial state, the transmission pipe can be relatively rotated with the dose drum and can jump up and down along the engagement surface therebetween, at this time, the dose drum can be freely rotated and the required dose is adjusted, when the injection button is pressed, the forward-reverse adjusting wheel presses the transmission pipe to be engaged with the dose drum through the teeth, then the transmission pipe pushes the inner plug of the medicine bottle forward through the driving mechanism and injection is performed.

[0013] As a further improvement of the present application, the forward-reverse adjusting wheel further integrates a first elastic tooth and a second elastic tooth, the first elastic tooth is buckled with the first thorn provided in the inner wall of the dose drum, and the second elastic tooth is buckled with the second thorn provided in the inner wall of the transmission pipe.

[0014] As a further improvement of the present application, the first elastic tooth and the second elastic tooth can only produce one-way bending deformation;

[0015] When the dose drum is rotated forward, the forward-reverse adjusting wheel is relatively rotated with the dose drum and produces sound, at the same time, the forward-reverse adjusting wheel is synchronously rotated with the transmission pipe;

[0016] When the dose drum is rotated reversely, the forward-reverse adjusting wheel is synchronously rotated with the dose drum, at the same time, the forward-reverse adjusting wheel is relatively rotated with the transmission pipe and produces sound.

[0017] As a further improvement of the present application, a memory ring is further included, which is sleeved on the transmission pipe and connected with the transmission pipe through threads, along with the rotation of the transmission pipe, the memory pipe moves up and down along the transmission pipe and memorizes the single-dose.

[0018] As a further improvement of the present application, the driving mechanism includes:

[0019] A driving pipe is arranged inside the transmission pipe and is drivingly connected with the transmission pipe, the driving pipe is rotated by the rotation of the transmission pipe;

[0020] A screw rod is arranged inside the driving pipe, the screw rod is threadedly connected with the driving pipe and the pen body, the screw rod is rotated and moves up and down by the rotation of the driving pipe.

[0021] As a further improvement of the present application, a medicine cartridge is further included, which is installed at the end of the pen body away from the dose drum, and the medicine bottle is installed in the medicine cartridge.

[0022] As a further improvement of the present application, a piston push piece is installed at the end of the screw rod, the piston push piece can push the inner plug of the medicine bottle and perform the action of injection.

[0023] As a further improvement of the present application, the end of the driving tube close to the medicine bottle is provided with a limiting block, the circumferential surface of the limiting block is provided with third elastic teeth, and the inner wall of the pen body is provided with third ratchets which are buckled with the third elastic teeth, with the rotation of the driving tube, the third elastic teeth move along the surface of the third ratchets and achieve the purpose of injection sound.

[0024] As a further improvement of the present application, a baffle is further included, which is sleeved on the screw rod, and the dose drum presses the baffle on the upper surface of the third ratchets, at this time, the baffle can limit the limiting block in the area where the third ratchets are located.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] 1. The elastic structure integrated by the forward and reverse adjusting wheels replaces the metal spring in the prior art, on the basis of realizing dose adjustment and injection, the whole insulin injection pen can be composed of plastic parts, which is convenient for product recycling, in addition, all parts of the forward and reverse adjusting wheels are integrally connected, the product integration degree is high, the product material and manufacturing cost are reduced, thereby the purchase cost of users can also be reduced, and the assembly process of the whole insulin injection pen is also simplified;

[0027] 2. The forward and reverse adjusting wheels simultaneously integrate the elastic structure and the adjusting sound structure, which further improves the product integration degree, reduces the number of product accessories and product materials, is convenient for assembly, reduces the production cost and improves the production efficiency;

[0028] 3. The number of product parts is reduced to thirteen, the process is reduced, and the production efficiency is improved;

[0029] 4. The screw rod is directly screwed with the pen body, which improves the stability of the dose precision of the product;

[0030] 5. The scale on the medicine bin is directly formed on the mold, which saves the original ink printing, reduces the process, reduces pollution, improves the production efficiency and reduces the production cost;

[0031] 6. The memory ring is installed on the transmission pipe, the memory ring is connected with the transmission pipe through threads, with the rotation of the transmission pipe, the memory pipe moves up and down along the transmission pipe and remembers the single dose;

[0032] 7. Unique matching connection structures are arranged between each part, which improves the connection firmness and stability, thereby improves the injection precision and ensures the stability and reliability of the product in use. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1is the structural schematic diagram and cross-sectional view of the insulin injection pen of the present application;

[0034] Figure 2 is the schematic diagram of the assembly process of the insulin injection pen of the present application;

[0035] Figure 3 is the structural schematic diagram of various perspectives of the dose drum of the present application;

[0036] Figure 4 is the structural schematic diagram of various perspectives of the threaded sleeve of the present application;

[0037] Figure 5 is the structural schematic diagram of various perspectives of the pen body of the present application;

[0038] Figure 6 is the structural schematic diagram of the cartridge and protective cap of the present application;

[0039] Figure 7 is the structural schematic diagram of various perspectives of the forward and reverse adjustment wheel of the present application;

[0040] Figure 8 is the structural schematic diagram of various perspectives of the injection button of the present application;

[0041] Figure 9 is the structural schematic diagram of various perspectives of the transmission tube of the present application;

[0042] Figure 10 is the structural schematic diagram of various perspectives of the drive tube of the present application;

[0043] Figure 11 is the structural schematic diagram of the screw rod of the present application.

[0044] In the figure, 100, pen body; 110, third thorn; 120, threaded sleeve assembly groove; 130, cartridge assembly positioning surface; 140, cartridge assembly hole;

[0045] 200, medicine bottle; 210, cartridge; 211, pen body assembly positioning inclined surface; 212, pen body assembly boss; 213, protective cap buckling boss;

[0046] 300, adjustment mechanism;

[0047] 310, dose drum; 311, transmission tube matching tooth; 312, first thorn; 313, memory ring stop block; 314, zero dose stop position clamping block; 315, maximum dose stop position clamping block; 316, injection button assembly buckle; 317, forward and reverse adjustment wheel assembly buckle;

[0048] 320. Adjustable wheel; 321. Elastic structure; 322. First assembly part; 3221. Assembly plate; 3222. Mounting ring; 323. Second assembly part; 324. First elastic tooth; 325. Second elastic tooth;

[0049] 330. Transmission tube; 331. Clutch surface; 332. Dosing cylinder meshing teeth; 333. Second thorn; 334. Memory ring positioning boss;

[0050] 340. Threaded sleeve; 341. Assembly positioning boss; 342. Zero-dose stop positioning surface; 343. Thread upper end endpoint; 344. Dosage scale window;

[0051] 350. Injection button; 351. Press lever;

[0052] 360, memory ring;

[0053] 400. Drive mechanism;

[0054] 410. Drive tube; 411. Limiting block; 412. Third elastic tooth; 413. Slot; 414. Protrusion;

[0055] 420. Screw; 421. Drive tube mating groove;

[0056] 430. Piston pusher plate;

[0057] 440. Baffle plate;

[0058] 500. Protective cap; 510. Medicine compartment fastener. Detailed Implementation

[0059] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0060] like Figures 1-11 As shown, the present invention provides an insulin injection pen that is easy to assemble and recycle, comprising:

[0061] The pen body 100 contains a medicine bottle 200.

[0062] The adjustment mechanism 300 includes a dosage drum 310, a forward and reverse adjustment wheel 320, and a transmission tube 330. The dosage drum 310 is rotatably connected to the pen body 100, the forward and reverse adjustment wheel 320 is disposed inside the dosage drum 310, and the transmission tube 330 is disposed inside the pen body 100.

[0063] A drive mechanism 400 is assembled inside the pen body 100 and is used to push the plug inside the medicine bottle 200 forward to administer the medicine;

[0064] The positive and negative adjusting wheel 320 is integrated with an elastic structure 321, the transmission pipe 330 is connected with the dose drum 310 through the elastic structure 321, the insulin injection pen is switched from the dose adjusting state to the injection state through the up and down connection of the transmission pipe 330, and the injection is given through the driving mechanism 400;

[0065] Specifically, the transmission pipe 330 has a clutch surface 331 for being connected with the dose drum 310, the bottom surface of the clutch surface 331 is provided with a dose drum meshing tooth 332 protruding downward, and the dose drum 310 has a transmission pipe matching tooth 311 protruding upward, in the dose adjusting state, the dose drum meshing tooth 332 of the transmission pipe 330 is separated from the transmission pipe matching tooth 311 of the dose drum 310, at this time, the dose adjustment of the injection can be performed by rotating the dose drum 310 in the positive direction or in the reverse direction, when the dose is adjusted to the required dose, the elastic structure 321 is deformed by pressing the positive and negative adjusting wheel 320 downward through external force, until the positive and negative adjusting wheel 320 presses the transmission pipe 330 downward to the state that the dose drum meshing tooth 332 is engaged with the transmission pipe matching tooth 311 of the dose drum 310, and then the transmission pipe 330 can complete the injection action through the driving mechanism 400.

[0066] It is worth mentioning here that in the embodiment, the elastic structure 321 integrated with the positive and negative adjusting wheel 320 replaces the metal spring in the prior art, on the basis of realizing dose adjustment and injection, the entire insulin injection pen can be composed of plastic parts, which is convenient for product recycling, in addition, all the parts of the positive and negative adjusting wheel 320 are integrally connected, the product has high integration, the product material and manufacturing cost are reduced, the purchase cost of the user is also reduced, and the assembly process of the entire insulin injection pen is also simplified.

[0067] Preferably, the adjusting mechanism 300 further comprises:

[0068] The threaded sleeve 340 is assembled in the pen body 100, the dose drum 310 is screwed with the threaded sleeve 340, and the dose drum 310 can be rotated in the positive direction and in the reverse direction and the dose is adjusted through the threaded sleeve 340;

[0069] The injection button 350 is installed on the positive and negative adjusting wheel 320, wherein the positive and negative adjusting wheel 320 and the injection button 350 are respectively connected with the dose drum 310, in the initial state, the transmission pipe 330 and the dose drum 310 can rotate relative to each other and the transmission pipe 330 can jump up and down along the clutch surface therebetween, at this time, the dose drum 310 can be freely rotated and the required dose can be adjusted, when the injection button 350 is pressed, the positive and negative adjusting wheel 320 presses the transmission pipe 330 downward to be engaged with the dose drum 310 through the teeth, and then the transmission pipe 330 pushes the plug in the medicine bottle 200 forward and injects the medicine through the driving mechanism 400.

[0070] The positive and negative adjusting wheel 320 comprises a first assembly part 322 and a second assembly part 323, the first assembly part 322 is used for cooperating connection with the dose drum 310 and the transmission pipe 330, the second assembly part 323 is used for mounting the injection button 350 and plays a role of elastically supporting the injection button 350 and the transmission pipe 330, the elastic structure 321 is integrated between the first assembly part 322 and the second assembly part 323, in the initial state, the first assembly part 322 is separated from the transmission pipe 330, at this time, the insulin injection pen is in the adjusting state, and the dose drum 310 can be freely rotated to adjust to the required dose; when injection is needed, the injection button 350 is pressed to overcome the elastic force of the elastic structure 321 to press the first assembly part 322 downward, until the first assembly part 322 presses the transmission pipe 330 to connect with the dose drum 310, at this time, the insulin injection pen is in the injection state and can inject the medicine.

[0071] In addition, in the embodiment, the elastic structure 321 is preferably composed of a plurality of elastic ribs, the two ends of the elastic ribs are connected with the first assembly part 322 and the second assembly part 323 respectively, the setting of the elastic ribs also improves the hand feeling when the user presses the injection button 350;

[0072] Specifically, the plurality of elastic ribs are arranged at intervals and distributed in a spiral shape, first, the elastic rib itself is made of a plastic elastic piece, so it has a certain elastic force, and because the plurality of elastic ribs are distributed in a spiral shape, when the injection button 350 is pressed, only a small force is needed to make the elastic rib deform, which is more convenient for injection.

[0073] Further, the first assembly part 322 comprises an assembly disc 3221 and a mounting ring 3222 connected with each other, the second assembly part 323, the mounting ring 3222 and the assembly disc 3221 are arranged in sequence from top to bottom, the two ends of the elastic rib are connected with the second assembly part 323 and the mounting ring 3222 respectively, the second assembly part 323 is arranged in a ring structure and has a mounting hole for mounting the injection button 350, the mounting ring 3222 has a through hole in the middle part, and the through hole and the mounting hole are located on the same vertical axis.

[0074] Specifically, when the injection button 350 is mounted on the second assembly part 323, the pressing rod 351 of the injection button 350 extends into the through hole, in the adjusting state of the insulin injection pen, the pressing rod 351 of the injection button 350 is separated from the assembly disc 3221, when the injection button 350 is pressed, the elastic rib deforms until the pressing rod 351 of the injection button 350 abuts against the assembly disc 3221, then the assembly disc 3221 moves downward and presses the transmission pipe 330 to connect with the dose drum 310, at this time, the insulin injection pen is converted to the injection state.

[0075] Preferably, the positive and negative adjusting wheel 320 also integrates a first elastic tooth 324 and a second elastic tooth 325, wherein the first elastic tooth 324 is arranged on the outer circumference of the mounting ring 3222, the second elastic tooth 325 is arranged on the bottom of the assembly disc 3221, and the first and second elastic blocks are respectively located on the upper and lower sides of the assembly disc 3221, so that the structural layout of the entire positive and negative adjusting wheel 320 is more reasonable, facilitating the cooperation and connection with the dose rotating drum 310 and the transmission pipe 330.

[0076] Among them, the first elastic tooth 324 is buckled with the first thorn 312 opened in the inner wall of the dose rotating drum 310, and the second elastic tooth 325 is buckled with the second thorn 333 opened in the inner wall of the transmission pipe 330. It should be noted that since the first elastic tooth 324 and the second elastic tooth 325 have a certain elasticity, they can be bent inward under the action of external force, so the "buckling" here is not completely locked, but a relatively rotating connection.

[0077] Specifically, when the dose rotating drum 310 rotates forward, the positive and negative adjusting wheel 320 rotates relative to the dose rotating drum 310 and makes a sound, and at the same time, the positive and negative adjusting wheel 320 rotates synchronously with the transmission pipe 330, that is, during the forward rotation of the dose rotating drum 310, the positive and negative adjusting wheel 320 and the dose rotating drum 310 are relatively movable, while the positive and negative adjusting wheel 320 and the transmission pipe 330 are locked.

[0078] Conversely, when the dose rotating drum 310 rotates reversely, the positive and negative adjusting wheel 320 rotates synchronously with the dose rotating drum 310, and at the same time, the positive and negative adjusting wheel 320 rotates relative to the transmission pipe 330 and makes a sound, thereby achieving the purpose of having and only one sound when the dose rotating drum 310 rotates forward or reversely.

[0079] In addition, it is worth mentioning that the positive and negative adjusting wheel 320 in the embodiment simultaneously integrates the elastic structure 321 and the adjusting sound structure, further improving the product integration, reducing the number of product accessories and product materials, facilitating assembly, reducing production cost and improving production efficiency.

[0080] Preferably, it also includes a memory ring 360, which is sleeved on the transmission pipe 330 and connected with the transmission pipe 330 through threads, and moves up and down along the transmission pipe 330 with the rotation of the transmission pipe 330 and memorizes the single dose, wherein the up and down stroke of the memory ring 360 is determined by the stop position on the transmission pipe 330 and the stop position in the inner hole of the dose rotating drum 310.

[0081] Among them, the uppermost end of the dose cylinder part of the dose rotating drum 310 forms a memory ring stop block 313, which serves as the maximum memory ring stop block 313.

[0082] Preferably, the driving mechanism 400 comprises:

[0083] a driving pipe 410, which is arranged inside the transmission pipe 330 and is in transmission connection with the transmission pipe 330, and the driving pipe 410 is driven to rotate by the rotation of the transmission pipe 330;

[0084] a screw rod 420, which is arranged inside the driving pipe 410, and the screw rod 420 is in threaded connection with the driving pipe 410 and the pen body 100, and the screw rod 420 is driven to rotate and move up and down by the rotation of the driving pipe 410;

[0085] That is, when the injection button 350 is pressed and the transmission pipe 330 is in gear engagement with the dose drum 310, the screw rod 420 is driven to move forward by the rotation of the transmission pipe 330, and the injection action is performed.

[0086] Preferably, the insulin injection pen further comprises a medicine bin 210, which is mounted at the end of the pen body 100 away from the dose drum 310, and the medicine bottle 200 is mounted in the medicine bin 210.

[0087] Preferably, the end of the screw rod 420 is provided with a piston push piece 430, and the piston push piece 430 is driven to push the plug in the medicine bottle 200 by the forward movement of the screw rod 420, so that the injection action is performed.

[0088] Preferably, the end of the driving pipe 410 close to the medicine bottle 200 is provided with a limiting block 411, and the circumferential surface of the limiting block 411 is provided with a third elastic tooth 412, and the inner wall of the pen body 100 is provided with a third ratchet 110 which is in engagement with the third elastic tooth 412, and the third elastic tooth 412 moves along the surface of the third ratchet 110 by the rotation of the driving pipe 410, and the purpose of injection sound is achieved.

[0089] Preferably, the insulin injection pen further comprises a stop piece 440, which is sleeved on the screw rod 420, and the dose drum 310 presses the stop piece 440 against the upper surface of the third ratchet 110, and at this time the stop piece 440 limits the limiting block 411 of the driving pipe 410 in the area of the third ratchet 110, thereby limiting the position of the driving pipe 410.

[0090] In addition, in order to improve the assembly precision, the insulin injection pen in the embodiment is provided with a plurality of cooperation structures between the parts, which are as follows:

[0091] 1. The inner wall of the pen body 100 is provided with a threaded sleeve assembly groove 120, and the outer wall of the threaded sleeve 340 is vertically provided with an assembly positioning boss 341, and the assembly positioning boss 341 is inserted along the threaded sleeve assembly groove 120;

[0092] 2、dose drum portion of the dose drum 310, the upper and lower ends are respectively provided with zero dose stopper block 314 and maximum dose stopper block 315, while the top surface of the threaded sleeve 340 is provided with zero dose stop position 342, wherein the threaded sleeve 340 zero dose stop position 342 and dose drum 310 zero dose stopper block cooperate, while the maximum dose stopper block 315 of the dose drum 310 cooperates with the threaded upper end of the threaded sleeve 340, which is provided with the threaded upper end of the threaded sleeve 340, thereby realizing the maximum and minimum dose limiting, avoiding the over rotation of the dose drum 310;

[0093] 3、dose drum 310 is provided with injection button assembly buckle 316 and positive and negative adjustment wheel assembly buckle 317 for facilitating the assembly of injection button 350 and positive and negative adjustment wheel 320;

[0094] 4、pen body 100 is used for connecting with the cartridge 210, which is provided with cartridge assembly positioning surface 130 and cartridge assembly hole 140, while the cartridge 210 is provided with pen body assembly positioning inclined surface 211 and pen body assembly boss 212, when the cartridge 210 is assembled into the pen body 100, the pen body assembly positioning inclined surface 211 cooperates with the cartridge assembly positioning surface 130, and the pen body assembly boss 212 is embedded into the cartridge assembly hole 140;

[0095] 5、it also includes a protective cap 500, which is provided with cartridge buckle 510 and protective cap buckle boss 213 respectively matched with the cartridge 210;

[0096] 6、threaded sleeve 340 is provided with dose scale window 344, which is convenient for users to check the dose scale;

[0097] 7、the outer wall of the drive pipe 410 is provided with a plurality of vertical slots 413 for cooperating with the transmission pipe 330, and the inner wall of the drive pipe 410 is further provided with a protrusion 414 for cooperating with the screw rod 420;

[0098] 8、the screw rod 420 is provided with a drive pipe matching groove 421 for cooperating with the drive pipe 410;

[0099] 9、the threaded bottom end of the transmission pipe 330 is provided with a memory ring positioning boss 334 for cooperating with the memory ring 360.

[0100] The technical means disclosed in the scheme of the present application is not limited to the technical means disclosed in the above technical means, but also includes the technical solutions composed of any combination of the above technical features. The above is the specific embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, these improvements and refinements are also considered as the protection scope of the present application.

[0101] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., are only used for explanation purposes and are not intended to limit the scope of the present application.

[0102] In addition, the terms "first", "second", "one", etc. in the present application are only used for descriptive purposes and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0103] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0104] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. An insulin injection pen that is easy to assemble and recycle, characterized in that, The application relates to an insulin injection pen, which comprises the following parts: a pen body, in which a medicine bottle is arranged; an adjusting mechanism, which comprises a dose drum, a forward-reverse adjusting wheel and a transmission pipe, the dose drum is rotatably connected with the pen body, the forward-reverse adjusting wheel is arranged in the dose drum, and the transmission pipe is arranged in the pen body; a driving mechanism, which is arranged in the pen body and is used for pushing a plug in the medicine bottle to move forward and for medicine injection; the forward-reverse adjusting wheel is integrated with first elastic teeth and second elastic teeth, the first elastic teeth are buckled with first thorn holes arranged in the inner wall of the dose drum, and the second elastic teeth are buckled with second thorn holes arranged in the inner wall of the transmission pipe; the first elastic teeth and the second elastic teeth can only produce one-way bending deformation; when the dose drum rotates forward, the forward-reverse adjusting wheel rotates relative to the dose drum and produces sound, and the forward-reverse adjusting wheel rotates synchronously with the transmission pipe; when the dose drum rotates reversely, the forward-reverse adjusting wheel rotates synchronously with the dose drum, and the forward-reverse adjusting wheel rotates relative to the transmission pipe and produces sound; the forward-reverse adjusting wheel is integrated with an elastic structure, the transmission pipe and the dose drum are connected through the elastic structure, the insulin injection pen is switched from a dose adjusting state to an injection state through the up-down connection of the transmission pipe, and the driving mechanism is used for medicine injection; the forward-reverse adjusting wheel comprises a first assembly part and a second assembly part, the first assembly part is used for matched connection with the dose drum and the transmission pipe, the second assembly part is arranged with an injection button, and the elastic structure is integrated between the first assembly part and the second assembly part, wherein in an initial state, the first assembly part is separated from the transmission pipe, at this moment, the insulin injection pen is in the adjusting state, and the dose drum is freely rotated to adjust to a required dose; when injection is needed, the injection button is pressed to overcome the elastic force of the elastic structure and press the first assembly part downward until the first assembly part presses the transmission pipe to connect with the dose drum, at this moment, the insulin injection pen is in the injection state; the elastic structure is composed of a plurality of elastic strips, the two ends of the elastic strips are connected with the first assembly part and the second assembly part respectively, the plurality of elastic strips are arranged at intervals and distributed in a spiral shape, and the elastic strips are made of plastic elastic members.

2. The insulin injection pen of claim 1, wherein, the adjusting mechanism further comprises a threaded sleeve, which is arranged in the pen body, the dose drum is screwed with the threaded sleeve, the threaded sleeve is used for enabling the dose drum to rotate forward and reversely and for adjusting a medicine dose, wherein the forward-reverse adjusting wheel and the injection button are buckled with the dose drum respectively, in the initial state, the transmission pipe and the dose drum can rotate relative to each other and the transmission pipe can jump up and down along the disengagement surface between the two, at this moment, the dose drum can be freely rotated to adjust a required dose; when the injection button is pressed, the forward-reverse adjusting wheel presses the transmission pipe to connect with the dose drum through the teeth, and then the transmission pipe pushes the plug in the medicine bottle to move forward through the driving mechanism and for medicine injection.

3. The insulin injection pen of claim 1, wherein, The memory ring is sleeved on the transmission pipe and connected with the transmission pipe through threads, and moves up and down along the transmission pipe and memorizes the single dose of the medicine as the transmission pipe rotates.

4. The insulin injection pen of claim 1, wherein, The driving mechanism comprises: The driving pipe is arranged inside the transmission pipe and is in transmission connection with the transmission pipe, and rotates as the transmission pipe rotates; The screw rod is arranged inside the driving pipe, and is in threaded connection with the driving pipe and the pen body, and rotates and moves up and down as the driving pipe rotates.

5. An insulin injection pen for ease of assembly and disposal as defined in claim 4, wherein, The medicine cartridge is arranged in the pen body far from the dose drum, and the medicine bottle is arranged in the medicine cartridge.

6. An insulin injection pen for ease of assembly and disposal as defined in claim 5, wherein, The end of the screw rod is provided with the piston push piece, and the piston push piece can push the plug in the medicine bottle and perform the injection and administration action.

7. An insulin injection pen for ease of assembly and disposal as defined in claim 4, wherein, The end of the driving pipe close to the medicine bottle is provided with the limiting block, the circumferential surface of the limiting block is provided with the third elastic tooth, the inner wall of the pen body is provided with the third thorn in engagement with the third elastic tooth, and the third elastic tooth moves along the surface of the third thorn as the driving pipe rotates to achieve the injection sound generation purpose.

8. An insulin injection pen for ease of assembly and disposal as defined in claim 7, wherein, The blocking piece is sleeved on the screw rod, and the dose drum presses the blocking piece on the upper surface of the third thorn, and the blocking piece can limit the limiting block in the area where the third thorn is located.

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