Cam assembling mechanism for medical injection practice pen

Abstract

The utility model relates to the technical field of medical practice tool assembling, in particular to a medical injection practice pen cam assembling mechanism which comprises a conveying mechanism, a positioning mechanism, a transparent sleeve feeding mechanism, a piston rod feeding mechanism, a cam rod feeding mechanism, an assembling rotary disc mechanism, a pressing mechanism and a material taking and assembling mechanism. A conveying jig is conveyed on the conveying mechanism, a piston sleeve is placed on the conveying jig, and the positioning mechanism is used for positioning the conveying jig on the conveying mechanism; an assembling jig is arranged on the assembling rotary disc mechanism, and the pressing mechanism is used for pressing and assembling a cam rod to a transparent sleeve and limiting a piston rod; the material taking and assembling mechanism is used for grabbing the assembled cam rod and assembling the cam rod and the transparent sleeve to the piston sleeve. The problems that existing manual assembly is high in difficulty and low in efficiency are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical practice tool assembly, in particular to a cam assembly mechanism for a medical injection practice pen. Background Art

[0002] An insulin practice injection pen is a medical device designed specifically for diabetic patients, aiming to simulate the real insulin injection process to help patients become familiar with and master the insulin injection skills. The internal structure of the pen is carefully designed to simulate the actual operation of an insulin injection pen. The insulin practice injection pen usually does not contain real insulin liquid, but uses simulated liquid to ensure that patients will not come into contact with drugs during practice, thus ensuring safety. Through repeated practice, patients can proficiently master key steps such as preparation before injection, selection of injection sites, control of injection angles, control of injection depths, and post-injection handling.

[0003] The injection practice pen is assembled from multiple accessories. In the existing production process of the injection practice pen, it is assembled manually or by semi-automatic equipment. This assembly method has low efficiency, high difficulty, and high cost. Therefore, it is necessary to make an automated design for the production of the existing injection practice pen. Summary of the Utility Model

[0004] To solve the above problems, the utility model first performs automatic feeding of a transparent sleeve, then loads a piston rod, then loads a cam rod, compresses it after assembly, and grabs and assembles the assembled structure onto a piston sleeve on a jig to complete automatic assembly. It solves the problems of high difficulty and low efficiency in the existing manual assembly of a cam assembly mechanism for a medical injection practice pen.

[0005] The technical solution adopted by the utility model is: a cam assembly mechanism for a medical injection practice pen, including a conveying mechanism, a positioning mechanism, a transparent sleeve feeding mechanism, a piston rod feeding mechanism, a cam rod feeding mechanism, an assembly turntable mechanism, a compressing mechanism, and a picking and assembling mechanism. A conveying jig is transported on the conveying mechanism, and a piston sleeve is placed on the conveying jig. The positioning mechanism is used to position the conveying jig on the conveying mechanism. An assembly jig is arranged on the assembly turntable mechanism, and the assembly turntable mechanism is used to drive the assembly jig to sequentially pass through the transparent sleeve feeding mechanism, the piston rod feeding mechanism, the cam rod feeding mechanism, the compressing mechanism, and the picking and assembling mechanism. The transparent sleeve feeding mechanism is used to automatically feed the transparent sleeve to the assembly jig. The piston rod feeding mechanism is used to feed the piston rod to be assembled onto the transparent sleeve. The cam rod feeding mechanism is used to feed and assemble the cam rod onto the transparent sleeve. The compressing mechanism is used to compress and assemble the cam rod onto the transparent sleeve and limit the piston rod. The picking and assembling mechanism is used to grab the assembled cam rod and assemble it together with the transparent sleeve onto the piston sleeve.

[0006] A further improvement to the above solution is that the conveying mechanism includes a conveying support, conveying rollers, a conveyor belt, a conveying motor, and conveying baffles. The conveying baffles are arranged on both sides of the conveying support and form a conveying groove on the conveying support. The conveying rollers are arranged at both ends of the conveying support. The conveyor belt is arranged on the conveying rollers and is located in the conveying groove. The conveying motor is arranged on the conveying support and is drivingly connected to the conveying rollers. The conveyor belt is used to drive the conveying fixture to be transported on the conveying groove.

[0007] A further improvement to the above solution is that the conveying fixture includes a fixture bottom plate and a fixed placement seat. The fixed placement seat is provided with a placement groove for placing the piston sleeve. The positioning mechanism includes a conveying positioning module and a position positioning module. The conveying positioning module includes a first fixing frame, a conveying positioning cylinder, and a conveying positioning pressing block arranged on the conveying mechanism. The conveying positioning cylinder is arranged on the first fixing frame. The conveying positioning pressing block is arranged at the driving end of the conveying positioning cylinder. The conveying positioning pressing block is provided with a positioning surface facing the conveying direction of the conveying fixture. The positioning surface is used for positioning the fixture bottom plate on the conveying mechanism.

[0008] A further improvement to the above solution is that the position positioning module is located on one side of the conveying positioning module. The positioning surface is provided with a positioning pressing plate. The position positioning module includes a jacking cylinder and a jacking positioning block. The jacking positioning block faces the positioning pressing plate to clamp and position the fixture bottom plate.

[0009] A further improvement to the above solution is that the jacking positioning block is provided with a position positioning block. The fixture bottom plate is provided with a positioning groove. The position positioning block is used to cooperate with the positioning groove to position the fixture bottom plate and form a double-sided positioning structure in combination with the positioning surface. A positioning inclined surface is arranged on the upper side of the position positioning block.

[0010] A further improvement to the above solution is that positioning pins are arranged on both sides of the jacking positioning block where the position positioning block is located. Positioning pin holes are arranged on both sides of the fixture bottom plate. The positioning pin holes cooperate with the positioning pins to position the fixture bottom plate.

[0011] A further improvement to the above solution is that the transparent sleeve feeding mechanism includes a transparent sleeve feeding tray, a transparent sleeve feeding track, and a transparent sleeve picking component. One end of the transparent sleeve feeding track is connected to the transparent sleeve feeding tray. The transparent sleeve picking component is used to grab the transparent sleeve on the transparent sleeve feeding track and place it on the assembly fixture.

[0012] A further improvement to the above solution is that the piston rod feeding mechanism includes an end cap feeding tray, an end cap feeding track, an end cap picking component, a piston rod feeding tray, a piston rod feeding track, a piston rod picking component, and a piston rod assembling component. The end cap feeding tray is used to convey the end cap towards the end cap feeding track. The end cap picking component is used to pick up the end cap and place it on the piston rod assembling component. The piston rod feeding tray is used to supply the piston rod towards the piston rod feeding track. The piston rod picking component is used to grab the piston rod on the piston rod feeding track, assemble it with the end cap, and then place it on the transparent sleeve on the assembly jig for assembly.

[0013] A further improvement to the above solution is that the cam rod feeding mechanism includes a cam rod feeding tray, a cam rod feeding track, and a cam rod picking component. One end of the cam rod feeding track is connected to the cam rod feeding tray. The cam rod picking component is used to grab the cam rod on the cam rod feeding track and place it on the transparent sleeve.

[0014] A further improvement to the above solution is that the pressing mechanism includes a pressing drive cylinder and a pressing block, which are used to press and assemble the cam rod onto the transparent sleeve. The picking and assembling mechanism includes a picking transmission module and a picking and assembling jaw. The picking and assembling jaw is used to grab and place the assembled transparent sleeve onto the piston sleeve.

[0015] A further improvement to the above solution is that a pressing component with the same structure as the pressing mechanism is provided on one side of the conveying mechanism. The pressing component is used to press and fit the transparent sleeve into the piston sleeve.

[0016] The beneficial effects of the present utility model are as follows:

[0017] Compared with the assembly of existing medical injection practice pens, the present utility model realizes the automatic assembly of the cam structure. First, the transparent sleeve is fed, then the piston rod is inserted, then the cam rod is inserted. After the assembly is completed, it is pressed, and the assembled structure is grabbed and assembled onto the piston sleeve on the jig to complete the automatic assembly. It solves the problems of high difficulty and low efficiency in existing manual assembly.

[0018] This utility model integrates multiple automated modules such as conveying, positioning, feeding, assembling, pressing, and picking and assembling, realizing a one-stop automated production process from raw materials to finished products. It significantly reduces the labor operation cost, while improving the production efficiency and stability. The collaborative work of the conveying mechanism and the positioning mechanism ensures the precise position control of the conveying jig and the piston sleeve during the processing, avoiding assembly quality problems caused by position deviation and improving the qualified rate of products. The feeding mechanisms for key components such as the transparent sleeve, piston rod, and cam rod are independently designed, facilitating maintenance and upgrading. Moreover, the orderly scheduling of the assembling turntable mechanism ensures seamless connection between each process, enhancing the flexibility and efficiency of the overall production line. The design of the pressing mechanism not only ensures the firm connection between the cam rod and the transparent sleeve, but also effectively prevents loosening and misalignment during the assembly process by restricting the position of the piston rod, improving the durability and use safety of the product. The picking and assembling mechanism adopts intelligent grasping technology to precisely assemble the assembled cam rod and transparent sleeve combination onto the piston sleeve, achieving efficient and accurate finished product assembly and further improving the product quality and production efficiency. This utility model provides reliable technical support for medical teaching and practice through automation, precision, and intelligence, promoting technological progress and industrial upgrading in the medical training field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of the cam assembling mechanism of the medical injection practice pen of this utility model;

[0020] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of another perspective of the cam assembling mechanism of the medical injection practice pen in

[0021] Figure 3 is Figure 1 a top view schematic diagram of the cam assembling mechanism of the medical injection practice pen in

[0022] Figure 4 is Figure 1 a schematic diagram of the conveying mechanism of the cam assembling mechanism of the medical injection practice pen in

[0023] Figure 5 is Figure 1 a structural schematic diagram of the positioning mechanism of the cam assembling mechanism of the medical injection practice pen in

[0024] Figure 6 is Figure 1 an exploded schematic diagram of the positioning mechanism of the cam assembling mechanism of the medical injection practice pen in

[0025] Figure 7 is Figure 1 a schematic diagram of the piston rod feeding mechanism of the cam assembling mechanism of the medical injection practice pen in

[0026] Figure 8 This is a schematic structural diagram of the medical injection practice pen of the present utility model.

[0027] Explanation of the reference numerals in the drawings: conveying mechanism 1, conveying support 11, conveying roller 12, conveyor belt 13, conveying motor 14, conveying baffle 15, pressing assembly 16;

[0028] positioning mechanism 2, conveying and positioning module 21, first fixing frame 211, conveying and positioning cylinder 212, conveying and positioning pressing block 213, positioning surface 214, positioning pressing plate 215, position positioning module 22, lifting cylinder 221, lifting and positioning block 222, position positioning block 223, positioning pin 224;

[0029] transparent sleeve feeding mechanism 3, transparent sleeve feeding tray 31, transparent sleeve feeding track 32, transparent sleeve picking component 33;

[0030] piston rod feeding mechanism 4, end cap feeding tray 41, end cap feeding track 42, end cap picking component 43, piston rod feeding tray 44, piston rod feeding track 45, piston rod picking component 46, piston rod assembly component 47;

[0031] cam rod feeding mechanism 5, cam rod feeding tray 51, cam rod feeding track 52, cam rod picking component 53;

[0032] assembly turntable mechanism 6, assembly fixture 61;

[0033] pressing mechanism 7, pressing drive cylinder 71, pressing block 72;

[0034] picking and assembling mechanism 8, picking transmission module 81, picking and assembling jaw 82;

[0035] conveying fixture 9, fixture bottom plate 91, positioning groove 911, positioning pin hole 912, fixed placement seat 92, placement groove 921. Specific embodiments

[0036] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present utility model more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. As Figures 1 to 8 shown, in an embodiment of this utility model, a cam assembly mechanism for a medical injection practice pen is involved, which includes a conveying mechanism 1, a positioning mechanism 2, a transparent sleeve feeding mechanism 3, a piston rod feeding mechanism 4, a cam rod feeding mechanism 5, an assembly turntable mechanism 6, a pressing mechanism 7 and a picking and assembling mechanism 8. A conveying fixture 9 is conveyed on the conveying mechanism 1, and a piston sleeve is placed on the conveying fixture 9. The positioning mechanism 2 is used to position the conveying fixture 9 on the conveying mechanism 1. An assembly fixture 61 is arranged on the assembly turntable mechanism 6, and the assembly turntable mechanism 6 is used to drive the assembly fixture 61 to sequentially pass through the transparent sleeve feeding mechanism 3, the piston rod feeding mechanism 4, the cam rod feeding mechanism 5, the pressing mechanism 7 and the picking and assembling mechanism 8. The transparent sleeve feeding mechanism 3 is used to automatically feed the transparent sleeve to the assembly fixture 61. The piston rod feeding mechanism 4 is used to feed the piston rod for assembly onto the transparent sleeve. The cam rod feeding mechanism 5 is used to feed and assemble the cam rod onto the transparent sleeve. The pressing mechanism 7 is used to press and assemble the cam rod onto the transparent sleeve and limit the piston rod. The picking and assembling mechanism 8 is used to grab the assembled cam rod and assemble the transparent sleeve onto the piston sleeve on the fixture. This embodiment realizes the automatic assembly of the cam structure, sequentially feeds the transparent sleeve, then loads the piston rod, then loads the cam rod, presses it after completion of the assembly, and grabs and assembles the assembled structure onto the piston sleeve on the fixture to complete the automatic assembly. It solves the problems of high difficulty and low efficiency in existing manual assembly.

[0039] In this embodiment, by integrating multiple automated modules such as conveying, positioning, feeding, assembling, pressing, and picking and assembling, a one-stop automated production process from raw materials to finished products is achieved, significantly reducing the labor operation cost, while improving production efficiency and stability. The coordinated work of the conveying mechanism 1 and the positioning mechanism 2 ensures the precise position control of the conveying jig 9 and the piston sleeve during the processing, avoiding assembly quality problems caused by position deviation and improving the qualified rate of products. The feeding mechanisms for key components such as the transparent sleeve, the piston rod, and the cam rod are independently designed, facilitating maintenance and upgrading, and the orderly scheduling of the assembling turntable mechanism 6 ensures seamless connection between various processes, improving the flexibility and efficiency of the overall production line. The design of the pressing mechanism 7 not only ensures the firm connection between the cam rod and the transparent sleeve, but also effectively prevents loosening and misalignment during the assembly process by restricting the position of the piston rod, improving the durability and use safety of the product. The picking and assembling mechanism 8 adopts intelligent grasping technology to precisely assemble the assembled cam rod and transparent sleeve combination onto the piston sleeve, achieving efficient and accurate finished product assembly and further improving product quality and production efficiency. This embodiment provides reliable technical support for medical teaching and practice through automation, precision, and intelligence, promoting technological progress and industrial upgrading in the field of medical training.

[0040] Refer to Figure 4 As shown, the conveying mechanism 1 includes a conveying bracket 11, conveying rollers 12, a conveyor belt 13, a conveying motor 14, and conveying baffles 15. The conveying baffles 15 are arranged on both sides of the conveying bracket 11 and form a conveying groove on the conveying bracket 11. The conveying rollers 12 are arranged at both ends of the conveying bracket 11. The conveyor belt 13 is arranged on the conveying rollers 12 and is located in the conveying groove. The conveying motor 14 is arranged on the conveying bracket 11 and is drivingly connected to the conveying rollers 12. The conveyor belt 13 is used to drive the conveying jig 9 to be transmitted on the conveying groove. In this embodiment, the conveying bracket 11 stably supports the entire system, ensuring the stability of the operation environment. The precise cooperation between the conveying rollers 12 and the conveying motor 14 drives the conveyor belt 13 to run smoothly, reducing the vibration and damage risks of the injection pen during transmission. The design of the conveyor belt 13 not only optimizes the transmission path, but also enables the injection pen jig to move precisely and quickly in the preset conveying groove, greatly improving the continuity and automation level of the assembly operation. The setting of the conveying baffles 15 effectively avoids the lateral deviation of the injection pen during transmission, ensuring precise docking of the assembly.

[0041] Refer to Figures 5 to 6As shown, the conveying fixture 9 includes a fixture base plate 91 and a fixed placement seat 92. The fixed placement seat 92 is provided with a placement groove 921 for placing the piston sleeve. The positioning mechanism 2 includes a conveying positioning module 21 and a position positioning module 22. The conveying positioning module 21 includes a first fixing frame 211, a conveying positioning cylinder 212, and a conveying positioning pressure block 213 provided on the conveying mechanism 1. The conveying positioning cylinder 212 is provided on the first fixing frame 211, and the conveying positioning pressure block 213 is provided at the driving end of the conveying positioning cylinder 212. A positioning surface 214 is provided in the conveying direction of the conveying fixture 9 on the conveying positioning pressure block 213, and the positioning surface 214 is used for positioning the fixture base plate 91 on the conveying mechanism 1. In this embodiment, through the combination of the fixture base plate 91 and the fixed placement seat 92, the stable placement of the piston sleeve is ensured, facilitating subsequent automated operations. The conveying positioning module 21 utilizes the cooperative action of the conveying positioning cylinder 212 and the conveying positioning pressure block 213 to achieve precise positioning of the fixture base plate 91 on the conveying mechanism 1, reducing the assembly error caused by position deviation. The addition of the position positioning module 22 further refines the relative positions between components, ensuring high consistency in the heights of the various components of the medical injection pen during the assembly process. This structural design not only speeds up the assembly speed but also significantly improves the assembly quality of the product, meeting the requirements of the medical field for high-precision and high-efficiency production equipment.

[0042] The position positioning module 22 is located on one side of the conveying positioning module 21. A positioning pressure plate 215 is provided on the positioning surface 214. The position positioning module 22 includes a jacking cylinder 221 and a jacking positioning block 222. The jacking positioning block 222 faces the positioning pressure plate 215 to clamp and position the fixture base plate 91. In this embodiment, the position positioning module 22 is cleverly placed on one side of the conveying module. Through the precisely designed positioning surface 214 and the positioning pressure plate 215, the stable clamping and precise positioning of the fixture base plate 91 during the assembly process are ensured. The cooperation of the jacking cylinder 221 and the jacking positioning block 222 achieves rapid and error-free lifting adjustment of the fixture base plate 91, not only improving the automation level of the assembly but also significantly enhancing the safety and efficiency of the operation. This design effectively reduces the assembly error caused by position deviation, ensuring the precision and consistency of the assembly of the medical injection pen.

[0043] The lifting positioning block 222 is provided with a position positioning block 223. The fixture bottom plate 91 is provided with a positioning groove 911. The position positioning block 223 is used to cooperate with the positioning groove 911 to position the fixture bottom plate 91 and form a double-sided positioning structure in combination with the positioning surface 214. A positioning inclined surface is provided on the upper side of the position positioning block 223. Specifically, positioning pins 224 are provided on both sides of the lifting positioning block 222 where the position positioning block 223 is located. Positioning pin holes 912 are provided on both sides of the fixture bottom plate 91. The positioning pin holes 912 cooperate with the positioning pins 224 to position the fixture bottom plate 91. In this embodiment, the lifting positioning block 222 and the position positioning block 223 work together to construct a stable double-sided positioning structure by precisely matching the positioning groove 911 of the fixture bottom plate 91, effectively preventing offset and shaking during the assembly process and ensuring the precise docking of each component of the injection pen. In addition, the design of the positioning inclined surface on the upper side of the position positioning block 223 further optimizes the positioning process, making the contact smoother and reducing friction and wear. Coupled with the close cooperation between the positioning pins 224 on both sides and the positioning pin holes 912 of the fixture bottom plate 91, multiple positioning guarantees are formed, greatly improving the stability and reliability of the assembly.

[0044] Refer to Figure 3 As shown, the transparent sleeve feeding mechanism 3 includes a transparent sleeve feeding tray 31, a transparent sleeve feeding track 32, and a transparent sleeve picking component 33. One end of the transparent sleeve feeding track 32 is connected to the transparent sleeve feeding tray 31. The transparent sleeve picking component 33 is used to grab the transparent sleeve on the transparent sleeve feeding track 32 and place it on the assembly fixture 61. In this embodiment, the stable and continuous supply of the sleeve is realized through the transparent sleeve feeding tray 31, and the smoothness and directionality of the sleeve transmission are ensured in cooperation with the precisely designed feeding track. The transparent sleeve picking component 33 adopts advanced picking technology, can accurately pick up the sleeve on the feeding track and precisely place it on the assembly fixture 61, significantly improving the automation level and production efficiency of the assembly. This structure not only reduces manual intervention and the risk of operation errors, but also ensures the cleanliness and assembly quality of the transparent sleeve during the assembly process of the medical injection pen.

[0045] Refer to Figure 7As shown, the piston rod feeding mechanism 4 includes an end cap feeding tray 41, an end cap feeding track 42, an end cap picking component 43, a piston rod feeding tray 44, a piston rod feeding track 45, a piston rod picking component 46, and a piston rod assembly component 47. The end cap feeding tray 41 is used to convey the end cap towards the end cap feeding track 42. The end cap picking component 43 is used to pick the end cap and place it on the piston rod assembly component 47. The piston rod feeding tray 44 is used to supply the piston rod towards the piston rod feeding track 45. The piston rod picking component 46 is used to grab the piston rod on the piston rod feeding track 45, assemble it with the end cap, and then place it on the transparent sleeve on the assembly jig 61 for assembly. In this embodiment, through the precisely designed end cap and piston rod feeding systems, the efficiency and accuracy during the assembly process are ensured. The automatic feeding and picking of the end cap and piston rod greatly improve the production efficiency, reduce manual intervention, and thus reduce the operation error. At the same time, the assembly component in the mechanism can accurately assemble the piston rod and the end cap and stably place them on the transparent sleeve of the assembly jig 61.

[0046] The cam rod feeding mechanism 5 includes a cam rod feeding tray 51, a cam rod feeding track 52, and a cam rod picking component 53. One end of the cam rod feeding track 52 is connected to the cam rod feeding tray 51. The cam rod picking component 53 is used to grab the cam rod on the cam rod feeding track 52 and place it on the transparent sleeve. In this embodiment, by integrating the cam rod feeding tray 51, the feeding track, and the picking component, the efficient supply and accurate picking of the cam rod are realized. This mechanism ensures that the cam rod can be stably and continuously conveyed from the feeding tray through the track to the designated position, and then accurately placed into the transparent sleeve by the picking component.

[0047] The pressing mechanism 7 includes a pressing drive cylinder 71 and a pressing block 72 for pressing the cam rod onto the transparent sleeve for assembly. The picking and assembling mechanism 8 includes a picking transmission module 81 and a picking and assembling jaw 82. The picking and assembling jaw 82 is used to grab and place the assembled transparent sleeve onto the piston sleeve. Specifically, on one side of the conveying mechanism 1, there is a pressing component 16 with the same structure as the pressing mechanism 7. The pressing component 16 is used to press the transparent sleeve into the piston sleeve for assembly. In this embodiment, the precise cooperation between the pressing drive cylinder 71 and the pressing block 72 ensures the stable assembly between the cam rod and the transparent sleeve, avoids the performance degradation caused by loosening, and guarantees the stability and safety of the injection pen during use. At the same time, the efficient linkage between the picking transmission module 81 and the picking and assembling jaw 82 realizes the precise picking and positioning of the assembled transparent sleeve, greatly shortens the assembly cycle, reduces manual intervention, and improves the automation level. The design of the pressing component 16 beside the conveying mechanism 1 further stably presses the transparent sleeve into the piston sleeve through the pressing mechanism 7 with the same principle, realizing automatic assembly.

[0048] The above embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A cam assembly mechanism for a medical injection practice pen, characterized in that: It includes a conveying mechanism, a positioning mechanism, a transparent sleeve feeding mechanism, a piston rod feeding mechanism, a cam rod feeding mechanism, an assembly turntable mechanism, a pressing mechanism and a picking and assembling mechanism. There is a conveying fixture transmitted on the conveying mechanism, and a piston sleeve is placed on the conveying fixture. The positioning mechanism is used to position the conveying fixture on the conveying mechanism. An assembly fixture is arranged on the assembly turntable mechanism, and the assembly turntable mechanism is used to drive the assembly fixture to sequentially pass through the transparent sleeve feeding mechanism, the piston rod feeding mechanism, the cam rod feeding mechanism, the pressing mechanism and the picking and assembling mechanism. The transparent sleeve feeding mechanism is used to automatically feed the transparent sleeve to the assembly fixture. The piston rod feeding mechanism is used to feed the piston rod for assembly on the transparent sleeve. The cam rod feeding mechanism is used to feed and assemble the cam rod onto the transparent sleeve. The pressing mechanism is used to press and assemble the cam rod onto the transparent sleeve and limit the piston rod. The picking and assembling mechanism is used to grab the assembled cam rod and assemble it with the transparent sleeve onto the piston sleeve.

2. The cam assembly mechanism of the medical injection practice pen according to claim 1, wherein: The conveying mechanism includes a conveying bracket, conveying rollers, a conveyor belt, a conveying motor and conveying baffles. The conveying baffles are arranged on both sides of the conveying bracket and form a conveying groove on the conveying bracket. The conveying rollers are arranged at both ends of the conveying bracket. The conveyor belt is arranged on the conveying rollers and is located in the conveying groove. The conveying motor is arranged on the conveying bracket and is drivingly connected to the conveying rollers. The conveyor belt is used to drive the conveying fixture to be transmitted on the conveying groove.

3. The cam assembly mechanism of the medical injection practice pen according to claim 1, wherein: The conveying fixture includes a fixture bottom plate and a fixed placement seat. The fixed placement seat is provided with a placement groove for placing the piston sleeve. The positioning mechanism includes a conveying positioning module and a position positioning module. The conveying positioning module includes a first fixed frame arranged on the conveying mechanism, a conveying positioning cylinder and a conveying positioning pressing block. The conveying positioning cylinder is arranged on the first fixed frame. The conveying positioning pressing block is arranged at the driving end of the conveying positioning cylinder. The conveying positioning pressing block is provided with a positioning surface facing the conveying direction of the conveying fixture. The positioning surface is used to position the fixture bottom plate on the conveying mechanism.

4. The cam assembly mechanism of the medical injection practice pen according to claim 3, characterized in that: The position positioning module is located on one side of the conveying positioning module. The positioning surface is provided with a positioning pressing plate. The position positioning module includes a jacking cylinder and a jacking positioning block. The jacking positioning block is opposite to the positioning pressing plate to clamp and position the fixture bottom plate.

5. The cam assembly mechanism of the medical injection practice pen according to claim 4, characterized in that: The jacking positioning block is provided with a position positioning block. The fixture bottom plate is provided with a positioning groove. The position positioning block is used to cooperate with the positioning groove to position the fixture bottom plate and form a double-sided positioning structure in combination with the positioning surface. A positioning inclined surface is arranged on the upper side of the position positioning block.

6. The cam assembly mechanism of the medical injection practice pen according to claim 5, characterized in that: Positioning pin studs are arranged on both sides of the jacking positioning block where the position positioning block is located. Positioning pin holes are arranged on both sides of the fixture bottom plate. The positioning pin holes cooperate with the positioning pin studs to position the fixture bottom plate.

7. The cam assembly mechanism of the medical injection practice pen according to claim 1, characterized in that: The transparent sleeve feeding mechanism includes a transparent sleeve feeding tray, a transparent sleeve feeding track and a transparent sleeve picking component. One end of the transparent sleeve feeding track is connected to the transparent sleeve feeding tray. The transparent sleeve picking component is used to grab the transparent sleeve on the transparent sleeve feeding track and place it on the assembly fixture.

8. The cam assembly mechanism of the medical injection practice pen according to claim 1, characterized in that: The piston rod feeding mechanism includes an end cap feeding tray, an end cap feeding track, an end cap picking component, a piston rod feeding tray, a piston rod feeding track, a piston rod picking component, and a piston rod assembling component. The end cap feeding tray is used to convey the end cap towards the end cap feeding track. The end cap picking component is used to pick the end cap and place it on the piston rod assembling component. The piston rod feeding tray is used to supply the piston rod towards the piston rod feeding track. The piston rod picking component is used to grab the piston rod on the piston rod feeding track, assemble it with the end cap, and then place it on the transparent sleeve on the assembly jig for assembly.

9. The cam assembly mechanism of the medical injection practice pen according to claim 1, characterized in that: The cam rod feeding mechanism includes a cam rod feeding tray, a cam rod feeding track, and a cam rod picking component. One end of the cam rod feeding track is connected to the cam rod feeding tray. The cam rod picking component is used to grab the cam rod on the cam rod feeding track and place it on the transparent sleeve.

10. The cam assembly mechanism of the medical injection practice pen according to claim 1, characterized in that: The pressing mechanism includes a pressing drive cylinder and a pressing block for pressing and assembling the cam rod onto the transparent sleeve. The picking and assembling mechanism includes a picking transmission module and a picking and assembling jaw. The picking and assembling jaw is used to grab and place the assembled transparent sleeve onto the piston sleeve. On one side of the conveying mechanism, there is a pressing component with the same structure as the pressing mechanism. The pressing component is used to press and assemble the transparent sleeve into the piston sleeve.

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