Automatic assembly line for medical injection practice pens

Abstract

The invention relates to the technical field of medical practice tool assembly, in particular to a medical injection practice pen automatic assembly line which comprises a circulating conveying mechanism, a positioning mechanism, a shell feeding mechanism, a needle cylinder assembly mechanism, an inner piston assembly mechanism, a cam sleeve assembly mechanism, an inner spring assembly mechanism and a tail cover assembly mechanism. Conveying jigs are conveyed on the circulating conveying mechanism, and the positioning mechanism is used for positioning the conveying jigs on the circulating conveying mechanism. The circulating conveying mechanism is used for driving the conveying jig to sequentially pass through the shell feeding mechanism, the needle cylinder assembling mechanism, the inner piston assembling mechanism, the cam sleeve assembling mechanism, the inner spring assembling mechanism and the tail cover assembling mechanism. The shell feeding mechanism is used for placing shells and piston sleeves on the conveying jig. The problems that existing manual assembly is low in efficiency and high in difficulty are solved. The production capacity is greatly increased, the production cost is reduced, and mass production is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of medical practice tool assembly, in particular to an automatic assembly line for medical injection practice pens. Background Art

[0002] The insulin practice pen is a medical device designed for diabetic patients to simulate the real insulin injection process and help patients become familiar with and master the skills of insulin injection. The internal structure of the pen is carefully designed to simulate the actual operation of the insulin pen. The insulin practice pen usually does not contain real insulin solution, but uses simulated liquid to ensure that patients will not come into contact with the drug during practice, thereby ensuring safety. Through repeated practice, patients can master key steps such as preparation before injection, selection of injection site, mastery of injection angle, control of injection depth, and post-injection treatment.

[0003] The injection practice pen is assembled from multiple parts. The existing injection practice pens are assembled manually or by semi-automatic equipment during the production process. This assembly method is inefficient, difficult, and costly. Therefore, it is necessary to make an automated design for the existing injection practice pen production. Summary of the invention

[0004] To solve the above problems, the present invention solves the problems of low efficiency and high difficulty of existing manual assembly, greatly increases production capacity, reduces production costs, and is suitable for mass production of medical injection practice pen automatic assembly lines.

[0005] The technical solution adopted by the present invention is: an automatic assembly line for medical injection practice pens, including a circulating conveying mechanism, a positioning mechanism, a shell feeding mechanism, a syringe assembly mechanism, an inner piston assembly mechanism, a cam sleeve assembly mechanism, an inner spring assembly mechanism and a tail cover assembly mechanism, the circulating conveying mechanism is provided with a conveying jig, and the positioning mechanism is used to position the conveying jig on the circulating conveying mechanism. The circulating conveying mechanism is used to drive the conveying jig to pass through the outer shell feeding mechanism, the syringe assembly mechanism, the inner piston assembly mechanism, the cam sleeve assembly mechanism, the inner spring assembly mechanism and the tail cover assembly mechanism in sequence; the outer shell feeding mechanism is used to place the outer shell and the piston sleeve on the conveying jig; the syringe assembly mechanism is used to assemble the syringe and install it on the piston sleeve, the inner piston assembly mechanism is used to assemble the inner piston and install it on the syringe, the cam sleeve assembly mechanism is used to assemble the cam kit and install it on the inner piston, and the inner spring assembly mechanism is used to install the inner spring on the inner piston; a combination mechanism is provided on one side of the inner spring assembly mechanism, the combination mechanism is used to grab the completely assembled syringe and install it on the outer shell, and the tail cover assembly mechanism installs the tail cover on the outer shell.

[0006] A further improvement to the above scheme is that the circulating conveying mechanism includes an upper conveying assembly, a lower conveying assembly, a first lifting assembly and a second lifting assembly, a connecting frame is provided between the upper conveying assembly and the lower conveying assembly, the first lifting assembly and the second lifting assembly are respectively arranged at the two ends of the lower conveying assembly and the upper conveying assembly to form a closed-loop conveying channel, and the closed-loop conveying channel is used for conveying jigs.

[0007] A further improvement to the above scheme is that the upper conveying components are provided with multiple groups, and two adjacent groups of upper conveying components are connected end to end; the lower conveying components are provided with multiple groups, and two adjacent groups of lower conveying components are connected end to end; the upper conveying components are opposite to the lower conveying components in vertical direction.

[0008] A further improvement to the above scheme is that the upper conveying assembly includes an upper conveying frame, an upper conveying roller, an upper conveying belt, an upper conveying motor and an upper conveying baffle, the upper conveying rollers are arranged at both ends of the upper conveying frame, the upper conveying belt is transmission-connected to the upper conveying rollers, the upper conveying motor is arranged on the connecting frame and is drivingly connected to the upper conveying rollers; the upper conveying baffle is arranged on both sides of the upper conveying frame, and an upper conveying trough is formed on the upper side of the upper conveying belt, and the upper conveying belt is used to drive the conveying jig to transmit along the upper conveying trough.

[0009] A further improvement to the above scheme is that the lower conveying assembly includes a lower conveying frame, a lower conveying roller, a lower conveying belt, a lower conveying motor and a lower conveying baffle, the lower conveying rollers are arranged at both ends of the lower conveying frame, the lower conveying belt is transmission-connected to the lower conveying rollers, the lower conveying motor is arranged on the connecting frame and is drivingly connected to the lower conveying rollers; the lower conveying baffle is arranged on both sides of the lower conveying frame, and a lower conveying trough is formed on the upper side of the lower conveying belt, and the lower conveying belt is used to drive the conveying jig to transmit along the lower conveying trough.

[0010] A further improvement to the above scheme is that the conveying jig includes a jig base plate and a fixed placement seat, the fixed placement seat is provided with a first placement groove for placing the piston sleeve and a second placement groove for placing the outer shell; the positioning mechanism includes a conveying positioning module and a position positioning module, the conveying positioning module includes a first fixed frame, a conveying positioning cylinder and a conveying positioning pressure block arranged on the upper conveying component, the conveying positioning cylinder is arranged on the first fixed frame, the conveying positioning pressure block is arranged at the driving end of the conveying positioning cylinder, the conveying positioning pressure block is provided with a positioning surface facing the conveying direction of the conveying jig, and the positioning surface is used to position the jig base plate on the upper conveying component.

[0011] A further improvement to the above scheme is that the position positioning module is located on one side of the conveying positioning module, the positioning surface is provided with a positioning pressure plate, the position positioning module includes a lifting cylinder and a lifting positioning block, and the lifting positioning block is opposite to the positioning pressure plate to clamp and position the fixture bottom plate.

[0012] A further improvement to the above scheme is that the lifting positioning block is provided with a position positioning block, and 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 combined with the positioning surface to form a double-sided positioning structure; the upper side of the position positioning block is provided with a positioning inclined surface.

[0013] A further improvement to the above scheme is that positioning pins are provided on both sides of the jacking positioning block, and positioning pin holes are provided on both sides of the fixture bottom plate, and the positioning pin holes cooperate with the positioning pins to position the fixture bottom plate.

[0014] A further improvement to the above scheme is that the syringe assembly mechanism includes a syringe loading device, a first spring loading device, a second spring loading device, a syringe turntable device and a syringe picking mechanism, the syringe turntable device is provided with a syringe assembly jig, the syringe loading device is used to load the syringe onto the syringe assembly jig, the syringe turntable device is used to drive the syringe assembly jig to pass through the first spring loading device and the second spring loading device in sequence, the first spring loading device is used to install the first spring on the outer diameter of the syringe, and the second spring loading device is used to install the second spring on the inner diameter of the syringe; the syringe picking mechanism is used to grab the assembled syringe and install it on the piston cylinder.

[0015] A further improvement to the above scheme is that the syringe loading device includes a syringe feeding tray, a syringe feeding track and a syringe picking assembly, the syringe feeding track is connected to the syringe feeding tray, and the syringe picking assembly is used to grab the syringe on the syringe feeding track and place it on the syringe assembly jig; the syringe picking assembly is provided with a syringe picking rotating module and a syringe clamping module, the syringe picking rotating module is used to drive the syringe clamping module to rotate to adjust the angle of the syringe picking, and the syringe clamping module is used to clamp the syringe for loading.

[0016] A further improvement to the above scheme is that the first spring loading device includes a first spring feeding tray, a first spring feeding track and a first spring picking assembly, the first spring feeding track is connected to the first spring feeding tray, and the first spring picking assembly is used to grab the first spring on the first spring feeding track and assemble it to the outer diameter of the syringe.

[0017] A further improvement to the above scheme is that the second spring feeding device includes a second spring feeding tray, a second spring feeding track and a second spring picking assembly, the second spring feeding track is connected to the second spring feeding tray, and the second spring picking assembly is used to grab the second spring on the second spring feeding track and assemble it to the inner diameter of the syringe.

[0018] A further improvement to the above scheme is that the syringe material picking mechanism includes a gantry, an assembly transfer transmission module and a transfer grasping device, the assembly transfer transmission module is arranged on the gantry, the transfer grasping device is arranged on the assembly transfer transmission module, the transfer grasping device includes a transverse bracket and two groups of assembly robots arranged on the transverse bracket, a directional sleeve is arranged on one side of the syringe turntable device, the directional sleeve is used for positioning the direction of the syringe, the assembly transfer transmission module is used to drive two groups of assembly robots to alternate between the syringe assembly jig, the directional sleeve and the conveying jig; the assembly robot is provided with a direction adjustment motor and a grasping air claw, the direction adjustment motor is used to adjust the pay-off of the grasped syringe, and the grasping air claw is used to grasp the syringe; a CCD camera is arranged on the gantry to photograph the assembly condition and direction of the syringe.

[0019] A further improvement to the above scheme is that the inner piston assembly mechanism includes a transparent sleeve feeding mechanism, a piston rod feeding mechanism, a cam rod feeding mechanism, an inner piston turntable mechanism, a clamping mechanism and an inner piston assembly mechanism; the inner piston turntable mechanism is used to drive the piston assembly jig to pass through the transparent sleeve feeding mechanism, the piston rod feeding mechanism, the cam rod feeding mechanism, the clamping mechanism and the inner piston assembly mechanism in sequence, the transparent sleeve feeding mechanism is used to automatically feed the transparent sleeve to the piston assembly jig, and the piston rod feeding mechanism is used to feed the piston rod to the transparent The cam rod is assembled on a transparent sleeve, the cam rod feeding mechanism is used to load and assemble the cam rod onto the transparent sleeve, the clamping mechanism is used to clamp and assemble the cam rod onto the transparent sleeve, and limit the piston rod; the inner piston assembly mechanism is used to grab the assembled cam rod and assemble it onto the piston sleeve together with the transparent sleeve; the cam sleeve assembly mechanism is used to grab and orient the cam sleeve and assemble it onto the piston rod, and the cam sleeve assembly mechanism is used to grab and assemble the cam sleeve ring onto the cam rod; the inner spring assembly mechanism is used to install the inner spring into the inner diameter of the cam rod.

[0020] A further improvement to the above scheme is that the transparent sleeve loading mechanism includes a transparent sleeve feeding tray, a transparent sleeve feeding track and a transparent sleeve picking assembly, one end of the transparent sleeve feeding track is connected to the transparent sleeve feeding tray, and the transparent sleeve picking assembly is used to grab the transparent sleeve on the transparent sleeve feeding track and place it on the piston assembly jig.

[0021] A further improvement to the above scheme is that the piston rod feeding mechanism includes an end cover feeding tray, an end cover feeding track, an end cover picking assembly, a piston rod feeding tray, a piston rod feeding track, a piston rod picking assembly and a piston rod assembly assembly, the end cover feeding tray is used to transport the end cover toward the end cover feeding track, the end cover picking assembly is used to pick up the end cover and put it onto the piston rod assembly assembly, the piston rod feeding tray is used to feed the piston rod toward the piston rod feeding track, the piston rod picking assembly is used to grab the piston rod on the piston rod feeding track and assemble it with the end cover, and then place it on the transparent sleeve on the piston assembly jig for assembly.

[0022] A further improvement to the above scheme is that the cam rod feeding mechanism includes a cam rod feeding tray, a cam rod feeding track and a cam rod picking assembly, one end of the cam rod feeding track is connected to the cam rod feeding tray, and the cam rod picking assembly is used to grab the cam rod on the cam rod feeding track and place it on the transparent sleeve.

[0023] A further improvement to the above scheme is that the clamping mechanism includes a clamping drive cylinder and a clamping block, which are used to clamp the cam rod onto the transparent sleeve; the inner piston assembly mechanism includes a material picking transmission module and a material picking assembly clamp, and the material picking assembly clamp is used to grab the assembled transparent sleeve and place it on the piston sleeve.

[0024] A further improvement to the above solution is that a clamping assembly having the same structure as the clamping mechanism is provided on one side of the circulating conveying mechanism, and the clamping assembly is used to press the transparent sleeve into the piston sleeve.

[0025] A further improvement to the above scheme is that the cam sleeve assembly mechanism includes a cam sleeve feed tray, a cam sleeve feed track, a cam sleeve material picking assembly and a cam orienting mechanism, one end of the cam sleeve feed track is connected to the cam sleeve feed tray, and the cam sleeve material picking assembly is provided with a plurality of cam sleeve material picking claws, and the plurality of cam sleeve material picking claws are alternately transmitted to the cam sleeve feed track, the cam orienting mechanism and the conveying fixture to assemble the cam sleeve on the cam rod.

[0026] A further improvement to the above scheme is that the inner spring assembly mechanism includes an inner spring feed tray, an inner spring feed track and an inner spring picking assembly, one end of the inner spring feed track is connected to the inner spring feed tray, and the inner spring picking assembly is used to grab the inner spring on the inner spring feed track and place it on the inner diameter of the cam rod.

[0027] A further improvement to the above scheme is that the tail cap assembly mechanism includes a tail cap feed tray, a tail cap feed track and a tail cap picking assembly, one end of the tail cap feed track is connected to the tail cap feed tray, and the tail cap picking assembly is used to grab the tail cap on the tail cap feed track and assemble it to one end of the outer shell.

[0028] The beneficial effects of the present invention are: Compared with the existing medical injection practice pen assembly, the present invention adopts fully automated assembly, drives the conveying fixture to be transferred through the circular conveying mechanism, and positions it through the positioning mechanism during the conveying process, and assembles each accessory automatically in turn. It solves the problem of low efficiency and high difficulty of existing manual assembly. It greatly increases production capacity, reduces production costs, and is suitable for mass production.

[0029] The present invention realizes the full automation of the medical injection practice pen from shell loading to tail cover assembly by integrating a circular conveying mechanism and multiple precision positioning and assembly mechanisms. This continuous and uninterrupted production process greatly shortens the production cycle, reduces manual intervention and waiting time, and thus significantly improves production efficiency and overall production capacity. Under the same manpower configuration, more high-quality products can be produced to meet the market's growing demand for medical teaching and practice tools. The automated assembly line uses high-precision positioning mechanisms and special assembly equipment to ensure the precise execution of each assembly step. Whether it is the accurate matching of the shell and the piston sleeve, or the layer-by-layer assembly of the syringe, inner piston, cam sleeve and inner spring, it can be completed under strict process control, effectively avoiding errors and defective products that may be introduced by manual assembly. This highly consistent production method not only improves the overall quality of the product, but also enhances the user experience and trust. The introduction of the automated assembly line greatly reduces the labor demand on the production line and reduces labor costs. At the same time, by reducing the manual operation links, the error rate and scrap rate caused by human factors are reduced, further saving raw materials and production costs. In addition, the stable operation and efficient output of automated equipment also provide companies with more flexible production scheduling space, helping them to quickly adjust production plans according to market demand and improve market response speed.

[0030] Traditional medical device assembly operations often involve complex manual operations and potential mechanical injury risks. The application of automated assembly lines frees workers from heavy physical labor and high-risk working environments, improves working conditions, and reduces the risk of occupational injuries. At the same time, the safety protection mechanism and emergency shutdown function inside the equipment also provide strong guarantees for safety during the production process. With its efficient, precise, safe, and intelligent technical features, the present invention has brought significant technical and economic benefits to the production of medical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional schematic diagram of the automatic assembly line of the medical injection practice pen of the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of the automatic assembly line of the traditional Chinese medicine injection practice pen from another perspective; Figure 3 for Figure 1 A top view of the automatic assembly line for traditional Chinese medicine injection practice pens; Figure 4 for Figure 1 A top view schematic diagram of a circulating conveying mechanism of an automatic assembly line for traditional Chinese medicine injection practice pens; Figure 5 for Figure 1 Schematic diagram of the positioning mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Figure 6 for Figure 1 An exploded schematic diagram of a positioning mechanism of an automatic assembly line for a traditional Chinese medicine injection practice pen; Figure 7 for Figure 1 Schematic diagram of a partial structure of an automatic assembly line for traditional Chinese medicine injection practice pens; Figure 8 for Figure 1 Schematic diagram of the syringe assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig. 9 for Figure 1 Schematic diagram of the syringe assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig.10 for Figure 1 Schematic diagram of the inner piston assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig.11 for Figure 1 Schematic diagram of the inner piston assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig.12 for Figure 1 A top view of the inner piston assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig.13 for Fig.11 Schematic diagram of the cam rod feeding mechanism of the inner piston assembly mechanism; Fig.14 for Figure 1 Schematic diagram of the cam sleeve assembly mechanism of the automatic assembly line of the traditional Chinese medicine injection practice pen; Fig.15 for Figure 2 A is an enlarged schematic diagram; Fig.16 It is a schematic diagram of the explosion of the medical injection practice pen of the present invention.

[0032] Description of reference numerals: circulating conveying mechanism 1, upper conveying assembly 11, upper conveying frame 111, upper conveying roller 112, upper conveying belt 113, upper conveying motor 114, upper conveying baffle 115, lower conveying assembly 12, lower conveying frame 121, lower conveying roller 122, lower conveying belt 123, lower conveying motor 124, lower conveying baffle 125, first lifting assembly 13, second lifting assembly 14, connecting frame 15; Positioning mechanism 2, conveying positioning module 21, first fixing frame 211, conveying positioning cylinder 212, conveying positioning block 213, positioning surface 214, positioning plate 215, position positioning module 22, lifting cylinder 221, lifting positioning block 222, position positioning block 223, positioning pin 224, shell feeding mechanism 3; Syringe assembly mechanism 4, syringe loading device 41, syringe feeding disk 411, syringe feeding track 412, syringe picking assembly 413, syringe picking rotating module 4131, syringe clamping module 4132, first spring loading device 42, first spring feeding disk 421, first spring feeding track 422, first spring picking assembly 423, second spring loading device 43, second spring feeding disk 431, second spring feeding track 432, second spring picking assembly 433, syringe turntable device 44, syringe assembly fixture 441, directional shaft sleeve 442, syringe picking mechanism 45, gantry 451, CCD camera 4511, assembly transfer transmission module 452, transfer grabbing device 453, transverse bracket 4531, assembly manipulator 4532; Inner piston assembly mechanism 5, transparent sleeve feeding mechanism 51, transparent sleeve feeding tray 511, transparent sleeve feeding track 512, transparent sleeve picking assembly 513, piston rod feeding mechanism 52, end cover feeding tray 521, end cover feeding track 522, end cover picking assembly 523, piston rod feeding tray 524, piston rod feeding track 525, piston rod picking assembly 526, piston rod assembly assembly 527, cam rod feeding mechanism 53, cam rod feeding tray 531, cam rod feeding track 532, cam rod picking assembly 533, inner piston turntable mechanism 54, piston assembly fixture 541, clamping mechanism 55, clamping drive cylinder 551, clamping block 552, inner piston assembly mechanism 56, picking transmission module 561, picking assembly clamp 562; Cam sleeve assembly mechanism 6, cam sleeve feeding tray 61, cam sleeve feeding track 62, cam sleeve material taking component 63, cam sleeve material taking clamping claw 631, cam orientation mechanism 64; Inner spring assembly mechanism 7, inner spring feeding tray 71, inner spring feeding track 72, inner spring taking assembly 73; Tail cover assembly mechanism 8, tail cover feeding tray 81, tail cover feeding track 82, tail cover taking component 83; The conveying fixture 9 , the fixture bottom plate 91 , the positioning groove 911 , the positioning pin hole 912 , the fixed placement seat 92 , the first placement groove 921 , the second placement groove 922 , and the assembly mechanism 10 . DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention 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 of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Figure 1 to Figure 16As shown, in one embodiment of the present invention, an automatic assembly line for a medical injection practice pen is involved, comprising a circulating conveying mechanism 1, a positioning mechanism 2, a shell feeding mechanism 3, a syringe assembly mechanism 4, an inner piston assembly mechanism 5, a cam sleeve assembly mechanism 6, an inner spring assembly mechanism 7 and a tail cover assembly mechanism 8, wherein a conveying jig 9 is transported on the circulating conveying mechanism 1, and the positioning mechanism 2 is used to position the conveying jig 9 on the circulating conveying mechanism 1. The circular conveying mechanism 1 is used to drive the conveying fixture 9 to pass through the shell feeding mechanism 3, the syringe assembly mechanism 4, the inner piston assembly mechanism 5, the cam sleeve assembly mechanism 6, the inner spring assembly mechanism 7 and the tail cover assembly mechanism 8 in sequence; the shell feeding mechanism 3 is used to put the shell and the piston sleeve on the conveying fixture 9; the syringe assembly mechanism 4 is used to assemble the syringe and load it onto the piston sleeve, the inner piston assembly mechanism 5 is used to assemble the inner piston and load it onto the syringe, the cam sleeve assembly mechanism 6 is used to assemble the cam set and load it onto the inner piston, and the inner spring assembly mechanism 7 is used to load the inner spring onto the inner piston; a combination mechanism 10 is provided on one side of the inner spring assembly mechanism 7, and the combination mechanism 10 is used to grab and load the fully assembled syringe onto the shell, and the tail cover assembly mechanism 8 loads the tail cover onto the shell. This embodiment adopts fully automated assembly, and the conveying fixture 9 is driven to be transferred by the circular conveying mechanism 1, and is positioned by the positioning mechanism 2 during the conveying process, and each accessory is automatically assembled in sequence. The problem of low efficiency and high difficulty of existing manual assembly is solved. It greatly increases production capacity, reduces production costs, and is suitable for mass production.

[0036] This embodiment realizes the full automation of the medical injection practice pen from shell loading to tail cover assembly by integrating a circular conveying mechanism 1 and multiple precision positioning and assembly mechanisms. This continuous and uninterrupted production process greatly shortens the production cycle, reduces manual intervention and waiting time, and thus significantly improves production efficiency and overall production capacity. Under the same manpower configuration, more high-quality products can be produced to meet the market's growing demand for medical teaching and practice tools. The automated assembly line uses a high-precision positioning mechanism 2 and special assembly equipment to ensure the precise execution of each assembly step. Whether it is the accurate matching of the shell and the piston sleeve, or the layer-by-layer assembly of the syringe, inner piston, cam sleeve and inner spring, it can be completed under strict process control, effectively avoiding errors and defective products that may be introduced by manual assembly. This highly consistent production method not only improves the overall quality of the product, but also enhances the user experience and trust. The introduction of the automated assembly line greatly reduces the labor demand on the production line and reduces labor costs. At the same time, by reducing the manual operation links, the error rate and scrap rate caused by human factors are reduced, further saving raw materials and production costs. In addition, the stable operation and efficient output of automated equipment also provide companies with more flexible production scheduling space, helping them to quickly adjust production plans according to market demand and improve market response speed.

[0037] Traditional medical device assembly operations often involve complex manual operations and potential mechanical injury risks. The application of automated assembly lines frees workers from heavy physical labor and high-risk working environments, improves working conditions, and reduces the risk of occupational injuries. At the same time, the safety protection mechanism and emergency shutdown function inside the equipment also provide strong guarantees for safety during the production process. This embodiment, with its efficient, precise, safe, and intelligent technical features, has brought significant technical and economic benefits to medical device production.

[0038] See also Figure 4As shown, the circulating conveying mechanism 1 includes an upper conveying component 11, a lower conveying component 12, a first lifting component 13 and a second lifting component 14. A connecting frame 15 is provided between the upper conveying component 11 and the lower conveying component 12. The first lifting component 13 and the second lifting component 14 are respectively arranged at the two ends of the lower conveying component 12 and the upper conveying component 11 to form a closed-loop conveying channel, and the closed-loop conveying channel is used for conveying the jig 9. Specifically, the upper conveying component 11 is provided with multiple groups, and the two adjacent groups of upper conveying components 11 are connected end to end; the lower conveying component 12 is provided with multiple groups, and the two adjacent groups of lower conveying components 12 are connected end to end; the upper conveying component 11 and the lower conveying component 12 are opposite to each other up and down. In this embodiment, through the ingenious layout of the upper and lower conveying components 12 and the end-to-end connection design between multiple groups of components, efficient and continuous material transmission is achieved, which significantly improves the automation level of the assembly line. The setting of the first and second lifting assemblies 14 not only constructs a closed-loop conveying channel to ensure seamless connection of the jig transmission, but also optimizes space utilization and reduces waiting time during material handling. The relative configuration of the upper and lower layers effectively utilizes the vertical space, making the production line layout more compact and improving overall production efficiency. In addition, the mechanism also enhances the flexibility of the production process, making it easy to adjust the conveying speed and path of the jig according to production needs.

[0039] The upper conveying assembly 11 includes an upper conveying frame 111, an upper conveying roller 112, an upper conveying belt 113, an upper conveying motor 114 and an upper conveying baffle 115. The upper conveying roller 112 is arranged at both ends of the upper conveying frame 111, the upper conveying belt 113 is transmission-connected to the upper conveying roller 112, the upper conveying motor 114 is arranged on the connecting frame 15, and is drivingly connected to the upper conveying roller 112; the upper conveying baffle 115 is arranged on both sides of the upper conveying frame 111, and an upper conveying trough is formed on the upper side of the upper conveying belt 113, and the upper conveying belt 113 is used to drive the conveying jig 9 to be transmitted along the upper conveying trough. Specifically, the lower conveying assembly 12 includes a lower conveying frame 121, a lower conveying roller 122, a lower conveying belt 123, a lower conveying motor 124 and a lower conveying baffle 125. The lower conveying roller 122 is arranged at both ends of the lower conveying frame 121, the lower conveying belt 123 is connected to the lower conveying roller 122, the lower conveying motor 124 is arranged on the connecting frame 15, and is connected to the lower conveying roller 122 by driving; the lower conveying baffle 125 is arranged on both sides of the lower conveying frame 121, and a lower conveying trough is formed on the upper side of the lower conveying belt 123, and the lower conveying belt 123 is used to drive the conveying fixture 9 to be transmitted along the lower conveying trough. In this embodiment, the upper conveying trough of the upper conveying belt 113 and the lower conveying trough of the lower conveying belt 123 are used to realize the rapid diversion and orderly transmission of the conveying fixture 9. The upper and lower conveying motors 124 are driven independently, ensuring flexible adjustment of the conveying speed in each area and meeting the time synchronization requirements of different processes. The stable setting of the conveying rollers and the close cooperation of the conveyor belt reduce vibration and deviation during material transmission and improve assembly accuracy.

[0040] See also Figure 5~Figure 6As shown, the conveying jig 9 includes a jig base plate 91 and a fixed placement seat 92, the fixed placement seat 92 is provided with a first placement groove 921 for placing a piston sleeve and a second placement groove 922 for placing an outer shell; the positioning mechanism 2 includes a conveying positioning module 21 and a position positioning module 22, the conveying positioning module 21 includes a first fixed frame 211, a conveying positioning cylinder 212 and a conveying positioning block 213 arranged on the upper conveying component 11, the conveying positioning cylinder 212 is arranged on the first fixed frame 211, the conveying positioning block 213 is arranged at the driving end of the conveying positioning cylinder 212, and the conveying positioning block 213 is provided with a positioning surface 214 facing the conveying direction of the conveying jig 9, and the positioning surface 214 is used to position the jig base plate 91 on the upper conveying component 11. Specifically, the position positioning module 22 is located on one side of the conveying positioning module 21, and the positioning surface 214 is provided with a positioning plate 215. The position positioning module 22 includes a lifting cylinder 221 and a lifting positioning block 222. The lifting positioning block 222 is opposite to the positioning plate 215 to clamp and position the fixture bottom plate 91. The lifting positioning block 222 is provided with a position positioning block 223, and 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 combined with the positioning surface 214 to form a double-sided positioning structure; the upper side of the position positioning block 223 is provided with a positioning inclined surface. The lifting positioning block 222 is provided with positioning pins 224 on both sides of the position positioning block 223, and the 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, by integrating the jig base plate 91 and the fixed placement seat 92, the accurate placement of key components such as the piston is ensured, and the stability and accuracy of the assembly process are improved. The synergistic effect of the conveying positioning module 21 and the position positioning module 22 not only realizes the rapid positioning of the jig base plate 91 on the upper conveying component 11, but also constructs a stable double-sided positioning structure through the double-sided clamping design of the positioning surface 214 of the conveying positioning pressure block 213 and the lifting positioning block 222, effectively preventing the jig base plate 91 from deflecting during the conveying process, and ensuring the consistency and efficiency of subsequent assembly operations. In addition, the positioning bevel on the position positioning block 223 is closely matched with the positioning groove 911 of the jig base plate 91, combined with the precise docking of the positioning pin 224 and the positioning pin hole 912, further enhancing the positioning accuracy and reliability, and reducing assembly errors. Under the combined effect of these design features, the automation level and production efficiency of the medical injection practice pen assembly line are significantly improved, while ensuring the consistency of product quality.

[0041] See also Figure 7~Figure 9As shown, the syringe assembly mechanism 4 includes a syringe loading device 41, a first spring loading device 42, a second spring loading device 43, a syringe turntable device 44 and a syringe picking mechanism 45. The syringe turntable device 44 is provided with a syringe assembly jig 441. The syringe loading device 41 is used to load the syringe onto the syringe assembly jig 441. The syringe turntable device 44 is used to drive the syringe assembly jig 441 to pass through the first spring loading device 42 and the second spring loading device 43 in sequence. The first spring loading device 42 is used to install the first spring on the outer diameter of the syringe, and the second spring loading device 43 is used to install the second spring on the inner diameter of the syringe; the syringe picking mechanism 45 is used to grab the assembled syringe and install it on the piston cylinder. In this embodiment, through the integrated syringe loading, spring automatic installation and syringe picking functions, the syringe and spring are assembled quickly and accurately, which effectively reduces manual intervention and reduces the operating error rate. The design of the syringe turntable device 44 enables the syringe to flow smoothly between various processes, ensuring the continuity and stability of the production process. At the same time, the first spring and the second spring are accurately installed on the inner and outer diameters of the syringe, respectively, meeting the strict requirements of the injection practice pen on the syringe structure. Finally, the syringe material removal mechanism 45 accurately installs the assembled syringe on the piston cylinder.

[0042] The syringe loading device 41 includes a syringe feeding tray 411, a syringe feeding track 412 and a syringe picking assembly 413. The syringe feeding track 412 is connected to the syringe feeding tray 411. The syringe picking assembly 413 is used to grab the syringe on the syringe feeding track 412 and place it on the syringe assembly fixture 441; the syringe picking assembly 413 is provided with a syringe picking rotating module 4131 and a syringe clamping module 4132. The syringe picking rotating module 4131 is used to drive the syringe clamping module 4132 to rotate to adjust the angle of the syringe picking, and the syringe clamping module 4132 is used to clamp the syringe for loading. The first spring feeding device 42 includes a first spring feeding tray 421, a first spring feeding track 422 and a first spring taking component 423, wherein the first spring feeding track 422 is connected to the first spring feeding tray 421, and the first spring taking component 423 is used to grab the outer diameter of the first spring assembled to the syringe on the first spring feeding track 422. The second spring feeding device 43 includes a second spring feeding tray 431, a second spring feeding track 432 and a second spring taking component 433, wherein the second spring feeding track 432 is connected to the second spring feeding tray 431, and the second spring taking component 433 is used to grab the inner diameter of the second spring assembled to the syringe on the second spring feeding track 432. In this embodiment, through the independent feeding system of the syringe, the first spring and the second spring, the continuity and stability of material supply are achieved, and the assembly efficiency and consistency are effectively improved. The design of the piston cylinder and syringe material taking component, especially the rotating and clamping module in the syringe material taking component 413, flexibly adjusts the grabbing angle, ensures the accuracy of syringe material feeding, and reduces human errors. At the same time, the first spring and the second spring are respectively automatically assembled for the inner and outer diameters of the syringe, which not only improves the assembly accuracy, but also greatly shortens the assembly cycle. Overall, the application of this set of feeding mechanism not only optimizes the production process, improves production efficiency and product quality, but also reduces labor costs.

[0043] The syringe material taking mechanism 45 includes a gantry 451, an assembly transfer transmission module 452 and a transfer grabbing device 453, wherein the assembly transfer transmission module 452 is arranged on the gantry 451, and the transfer grabbing device 453 is arranged on the assembly transfer transmission module 452. The transfer grabbing device 453 includes a transverse bracket 4531 and two groups of assembly manipulators 4532 arranged on the transverse bracket 4531. A directional sleeve 442 is arranged on one side of the syringe turntable device 44, and the directional sleeve 442 is used for the needle The assembly transfer transmission module 452 is used to drive two groups of assembly manipulators 4532 to alternate between the syringe assembly jig 441, the directional sleeve 442 and the conveying jig 9; the assembly manipulator 4532 is provided with a direction adjustment motor 4533 and a grabbing air gripper 4534, the direction adjustment motor 4533 is used to adjust the release of the grabbed syringe, and the grabbing air gripper 4534 is used to grab the syringe; the gantry 451 is provided with a CCD camera 4511 to photograph the assembly status and direction of the syringe. In this embodiment, the gantry 451 has a stable structure and provides a solid support platform for the entire material collection process. The flexible layout of the assembly transfer transmission module 452 on the gantry 451, combined with the precise operation of the transfer grabbing device 453, realizes the seamless connection and efficient transfer of the syringe from the assembly jig to the directional sleeve 442 and then to the conveying jig 9. The coordinated work of the direction adjustment motor 4533 and the gripping air gripper 4534 not only ensures the accuracy of the syringe gripping, but also allows the syringe direction to be flexibly adjusted to meet the assembly accuracy requirements. The setting of the directional sleeve 442 significantly improves the accuracy of the syringe direction positioning and avoids assembly errors. The CCD camera 4511 integrated on the gantry 451 monitors the syringe assembly status and direction in real time, providing an intuitive basis for quality control and ensuring the qualified rate of the final product.

[0044] See also Figure 10~Figure 13As shown, the inner piston assembly mechanism 5 includes a transparent sleeve feeding mechanism 51, a piston rod feeding mechanism 52, a cam rod feeding mechanism 53, an inner piston turntable mechanism 54, a clamping mechanism 55 and an inner piston assembly mechanism 56; the inner piston turntable mechanism 54 is used to drive the piston assembly jig 541 to pass through the transparent sleeve feeding mechanism 51, the piston rod feeding mechanism 52, the cam rod feeding mechanism 53, the clamping mechanism 55 and the inner piston assembly mechanism 56 in sequence, the transparent sleeve feeding mechanism 51 is used to automatically feed the transparent sleeve to the piston assembly jig 541, and the piston rod feeding mechanism 52 is used to The piston rod is loaded onto the transparent sleeve for assembly. The cam rod loading mechanism 53 is used to load and assemble the cam rod onto the transparent sleeve. The clamping mechanism 55 is used to clamp and assemble the cam rod onto the transparent sleeve and limit the piston rod. The inner piston assembly mechanism 56 is used to grab the assembled cam rod and assemble the transparent sleeve onto the piston sleeve. The cam sleeve assembly mechanism 6 is used to grab and orient the cam sleeve and assemble it onto the piston rod. The cam sleeve assembly mechanism 6 is used to grab and assemble the cam sleeve ring onto the cam rod. The inner spring assembly mechanism 7 is used to install the inner spring into the inner diameter of the cam rod. In this embodiment, the seamless connection and stability between the components are ensured and the human operation error is reduced through the automatic loading and precise assembly of the transparent sleeve, the piston rod and the cam rod. The introduction of the clamping mechanism 55 effectively ensures the close fit between the cam rod and the transparent sleeve, while limiting the position of the piston rod and enhancing the overall stability of the structure. The inner piston assembly mechanism 56 further accurately installs the assembled components onto the piston sleeve, realizing the rapid integration between the components. In addition, the automated assembly of the cam sleeve and inner spring not only improves assembly efficiency, but also ensures the integrity and functionality of the product's internal structure, providing reliable performance guarantees for the medical injection practice pen.

[0045] The transparent sleeve loading mechanism 51 includes a transparent sleeve feeding tray 511, a transparent sleeve feeding track 512 and a transparent sleeve picking assembly 513. One end of the transparent sleeve feeding track 512 is connected to the transparent sleeve feeding tray 511. The transparent sleeve picking assembly 513 is used to grab the transparent sleeve on the transparent sleeve feeding track 512 and place it on the piston assembly fixture 541. The piston rod feeding mechanism 52 includes an end cover feeding tray 521, an end cover feeding track 522, an end cover picking assembly 523, a piston rod feeding tray 524, a piston rod feeding track 525, a piston rod picking assembly 526 and a piston rod assembly assembly 527. The end cover feeding tray 521 is used to transport the end cover toward the end cover feeding track 522, the end cover picking assembly 523 is used to pick up the end cover onto the piston rod assembly assembly 527, the piston rod feeding tray 524 is used to feed the piston rod toward the piston rod feeding track 525, and the piston rod picking assembly 526 is used to grab the piston rod on the piston rod feeding track 525 and assemble it with the end cover, and then place it on the transparent sleeve on the piston assembly jig 541 for assembly. The cam rod feeding mechanism 53 includes a cam rod feeding tray 531, a cam rod feeding track 532 and a cam rod picking assembly 533. One end of the cam rod feeding track 532 is connected to the cam rod feeding tray 531. The cam rod picking assembly 533 is used to grab the cam rod on the cam rod feeding track 532 and place it on the transparent sleeve. In this embodiment, the transparent sleeve feeding mechanism 51 ensures the smooth supply and precise positioning of the sleeve, laying a solid foundation for the subsequent assembly steps. The piston rod feeding mechanism 52 realizes the automatic combination of the end cover and the piston rod through an integrated feeding and assembly process, and then accurately places them in the transparent sleeve, which greatly reduces manual intervention and improves the consistency and speed of assembly. The cam rod feeding mechanism 53 ensures the rapid and accurate installation of the cam rod, further consolidating the mechanical structure and functional integrity of the practice pen.

[0046] The clamping mechanism 55 includes a clamping drive cylinder 551 and a clamping block 552, which are used to clamp the cam rod onto the transparent sleeve; the inner piston assembly mechanism 56 includes a material taking transmission module 561 and a material taking assembly clamp 562, and the material taking assembly clamp 562 is used to grab and place the assembled transparent sleeve onto the piston sleeve. A clamping assembly with the same structure as the clamping mechanism 55 is provided on one side of the circulation conveying mechanism 1, and the clamping assembly is used to press the transparent sleeve into the piston sleeve. In this embodiment, the clamping mechanism 55 ensures that the cam rod is firmly assembled onto the transparent sleeve through the precise coordination of the clamping drive cylinder 551 and the clamping block 552, thereby improving the tightness and consistency of the assembly and reducing the failure rate caused by improper assembly. The inner piston assembly mechanism 56 utilizes the efficient operation of the material taking transmission module 561 and the clamp to achieve accurate grabbing and placement of the transparent sleeve to the piston sleeve, significantly improving assembly efficiency and product quality. At the same time, the clamping assembly with the same structure arranged on the circulating conveying mechanism 1 further ensures that the transparent sleeve can be pressed smoothly and tightly into the interior of the piston sleeve, thus achieving the smoothness and continuity of the overall assembly process.

[0047] See also Figure 14~Figure 15As shown, the cam sleeve assembly mechanism 6 includes a cam sleeve feed tray 61, a cam sleeve feed track 62, a cam sleeve pick-up assembly 63 and a cam orientation mechanism 64. One end of the cam sleeve feed track 62 is connected to the cam sleeve feed tray 61. The cam sleeve pick-up assembly 63 is provided with a plurality of cam sleeve pick-up jaws 631. The plurality of cam sleeve pick-up jaws 631 are alternately transmitted to the cam sleeve feed track 62, the cam orientation mechanism 64 and the conveying fixture 9 to assemble the cam sleeve on the cam rod. The inner spring assembly mechanism 7 includes an inner spring feed tray 71, an inner spring feed track 72 and an inner spring pick-up assembly 73. One end of the inner spring feed track 72 is connected to the inner spring feed tray 71. The inner spring pick-up assembly 73 is used to grab the inner spring on the inner spring feed track 72 and place it on the inner diameter of the cam rod. The tail cover assembly mechanism 8 includes a tail cover feed tray 81, a tail cover feed track 82 and a tail cover pick-up assembly 83, one end of the tail cover feed track 82 is connected to the tail cover feed tray 81, and the tail cover pick-up assembly 83 is used to grab the tail cover on the tail cover feed track 82 and assemble it to one end of the shell. In this embodiment, through the automated feed tray and track system, the continuous and stable supply of key components such as the cam sleeve, inner spring and tail cover is ensured, manual intervention is reduced, and errors and delays caused by human factors are avoided. The alternating transmission design of the cam sleeve pick-up assembly 63, in conjunction with the cam orientation mechanism 64, realizes the precise assembly of the cam sleeve on the cam rod, ensuring the close fit and movement accuracy between the components. The precise grabbing and placement of the inner spring pick-up assembly 73 effectively guarantees the correctness of the inner spring assembly position and enhances the performance and life of the practice pen. The tail cover pick-up assembly 83 ensures the stable connection between the tail cover and the shell, and improves the overall sealing and aesthetics of the product.

[0048] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An automatic assembly line for medical injection practice pens, characterized in that: It includes a circulating conveying mechanism, a positioning mechanism, a shell feeding mechanism, a syringe assembly mechanism, an inner piston assembly mechanism, a cam sleeve assembly mechanism, an inner spring assembly mechanism and a tail cover assembly mechanism. The circulating conveying mechanism is provided with a conveying jig, and the positioning mechanism is used to position the conveying jig on the circulating conveying mechanism. The circulating conveying mechanism is used to drive the conveying jig to pass through the outer shell feeding mechanism, the syringe assembly mechanism, the inner piston assembly mechanism, the cam sleeve assembly mechanism, the inner spring assembly mechanism and the tail cover assembly mechanism in sequence; the outer shell feeding mechanism is used to put the outer shell and the piston sleeve on the conveying jig; the syringe assembly mechanism is used to assemble the syringe and install it on the piston sleeve, the inner piston assembly mechanism is used to assemble the inner piston and install it on the syringe, the cam sleeve assembly mechanism is used to assemble the cam kit and install it on the inner piston, and the inner spring assembly mechanism is used to install the inner spring on the inner piston; A combination mechanism is provided on one side of the inner spring assembly mechanism, and the combination mechanism is used to grab the completely assembled syringe and install it on the outer shell, and the tail cover assembly mechanism installs the tail cover on the outer shell.

2. The automatic assembly line for medical injection practice pens according to claim 1, characterized in that: The circulating conveying mechanism includes an upper conveying assembly, a lower conveying assembly, a first lifting assembly and a second lifting assembly. A connecting frame is provided between the upper conveying assembly and the lower conveying assembly. The first lifting assembly and the second lifting assembly are respectively arranged at both ends of the lower conveying assembly and the upper conveying assembly to form a closed-loop conveying channel, and the closed-loop conveying channel is used for conveying jigs; The upper conveying components are provided with multiple groups, and two adjacent groups of upper conveying components are connected end to end; the lower conveying components are provided with multiple groups, and two adjacent groups of lower conveying components are connected end to end; the upper conveying components are opposite to the lower conveying components in vertical direction.

3. The automatic assembly line for medical injection practice pens according to claim 2, characterized in that: The upper conveying assembly includes an upper conveying frame, an upper conveying roller, an upper conveying belt, an upper conveying motor and an upper conveying baffle. The upper conveying rollers are arranged at both ends of the upper conveying frame. The upper conveying belt is connected to the upper conveying rollers. The upper conveying motor is arranged on the connecting frame and is connected to the upper conveying rollers. The upper conveying baffle is arranged on both sides of the upper conveying frame and forms an upper conveying trough on the upper side of the upper conveying belt. The upper conveying belt is used to drive the conveying jig to be transmitted along the upper conveying trough. The lower conveying assembly includes a lower conveying frame, a lower conveying roller, a lower conveying belt, a lower conveying motor and a lower conveying baffle. The lower conveying rollers are arranged at both ends of the lower conveying frame. The lower conveying belt is transmission-connected to the lower conveying rollers. The lower conveying motor is arranged on the connecting frame and drivingly connected to the lower conveying rollers. The lower conveying baffle is arranged on both sides of the lower conveying frame and forms a lower conveying trough on the upper side of the lower conveying belt. The lower conveying belt is used to drive the conveying jig to transmit along the lower conveying trough.

4. The automatic assembly line for medical injection practice pens according to claim 3, characterized in that: The conveying jig includes a jig base plate and a fixed placement seat, the fixed placement seat is provided with a first placement groove for placing a piston sleeve and a second placement groove for placing an outer shell; the positioning mechanism includes a conveying positioning module and a position positioning module, the conveying positioning module includes a first fixed frame, a conveying positioning cylinder and a conveying positioning pressure block arranged on the upper conveying component, the conveying positioning cylinder is arranged on the first fixed frame, the conveying positioning pressure block is arranged at the driving end of the conveying positioning cylinder, the conveying positioning pressure block is provided with a positioning surface facing the conveying direction of the conveying jig, and the positioning surface is used to position the jig base plate on the upper conveying component.

5. The automatic assembly line for medical injection practice pens according to claim 4, 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 plate, the position positioning module includes a lifting cylinder and a lifting positioning block, the lifting positioning block is opposite to the positioning plate to clamp and position the fixture bottom plate; The lifting positioning block is provided with a position positioning block, and 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; the upper side of the position positioning block is provided with a positioning inclined surface; The lifting positioning block is provided with positioning pins on both sides of the position positioning block, and the two sides of the fixture bottom plate are provided with positioning pin holes, and the positioning pin holes cooperate with the positioning pins to position the fixture bottom plate.

6. The automatic assembly line for medical injection practice pens according to claim 1, characterized in that: The syringe assembly mechanism includes a syringe loading device, a first spring loading device, a second spring loading device, a syringe turntable device and a syringe picking mechanism. The syringe turntable device is provided with a syringe assembly jig. The syringe loading device is used to load the syringe onto the syringe assembly jig. The syringe turntable device is used to drive the syringe assembly jig to pass through the first spring loading device and the second spring loading device in sequence. The first spring loading device is used to install the first spring on the outer diameter of the syringe, and the second spring loading device is used to install the second spring on the inner diameter of the syringe. The syringe picking mechanism is used to grab the assembled syringe and install it on the piston cylinder.

7. The automatic assembly line for medical injection practice pens according to claim 6, characterized in that: The syringe feeding device comprises a syringe feeding tray, a syringe feeding track and a syringe picking assembly, wherein the syringe feeding track is connected to the syringe feeding tray, and the syringe picking assembly is used to grab the syringe on the syringe feeding track and place it on the syringe assembly jig; the syringe picking assembly is provided with a syringe picking rotating module and a syringe clamping module, wherein the syringe picking rotating module is used to drive the syringe clamping module to rotate to adjust the syringe picking angle, and the syringe clamping module is used to clamp the syringe for feeding; The first spring feeding device comprises a first spring feeding tray, a first spring feeding track and a first spring taking assembly, wherein the first spring feeding track is connected to the first spring feeding tray, and the first spring taking assembly is used to grab the first spring on the first spring feeding track and assemble it to the outer diameter of the syringe; The second spring feeding device comprises a second spring feeding tray, a second spring feeding track and a second spring taking assembly, wherein the second spring feeding track is connected to the second spring feeding tray, and the second spring taking assembly is used to grab the second spring on the second spring feeding track and assemble it to the inner diameter of the syringe; The syringe picking mechanism includes a gantry, an assembly transfer transmission module and a transfer grabbing device, the assembly transfer transmission module is arranged on the gantry, the transfer grabbing device is arranged on the assembly transfer transmission module, the transfer grabbing device includes a transverse bracket and two groups of assembly manipulators arranged on the transverse bracket, a directional sleeve is arranged on one side of the syringe turntable device, the directional sleeve is used for positioning the direction of the syringe, the assembly transfer transmission module is used to drive the two groups of assembly manipulators to alternate between the syringe assembly jig, the directional sleeve and the conveying jig; the assembly manipulator is provided with a direction adjustment motor and a grabbing air claw, the direction adjustment motor is used to adjust the pay-off of the grabbed syringe, and the grabbing air claw is used to grab the syringe; a CCD camera is arranged on the gantry to shoot the assembly condition and direction of the syringe.

8. The automatic assembly line for medical injection practice pens according to claim 1, characterized in that: The inner piston assembly mechanism includes a transparent sleeve feeding mechanism, a piston rod feeding mechanism, a cam rod feeding mechanism, an inner piston turntable mechanism, a clamping mechanism and an inner piston assembly mechanism; the inner piston turntable mechanism is used to drive the assembly jig to pass through the transparent sleeve feeding mechanism, the piston rod feeding mechanism, the cam rod feeding mechanism, the clamping mechanism and the inner piston assembly mechanism in sequence, 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 the transparent sleeve for assembly, the cam rod feeding mechanism is used to feed and assemble the cam rod to the transparent sleeve, the clamping mechanism is used to clamp and assemble the cam rod to the transparent sleeve, and limit the piston rod; the inner piston assembly mechanism is used to grab the assembled cam rod and assemble the transparent sleeve to the piston sleeve; the cam sleeve assembly mechanism is used to grab and orient the cam sleeve and assemble it to the piston rod, and the cam sleeve assembly mechanism is used to grab and assemble the cam sleeve ring to the cam rod; the inner spring assembly mechanism is used to install the inner spring in the inner diameter of the cam rod; The transparent sleeve feeding mechanism includes a transparent sleeve feeding tray, a transparent sleeve feeding track and a transparent sleeve picking assembly. One end of the transparent sleeve feeding track is connected to the transparent sleeve feeding tray. The transparent sleeve picking assembly is used to grab the transparent sleeve on the transparent sleeve feeding track and place it on the assembly fixture.

9. The automatic assembly line for medical injection practice pens according to claim 8, characterized in that: The piston rod feeding mechanism comprises an end cover feeding tray, an end cover feeding track, an end cover picking assembly, a piston rod feeding tray, a piston rod feeding track, a piston rod picking assembly and a piston rod assembly assembly, wherein the end cover feeding tray is used to convey the end cover toward the end cover feeding track, the end cover picking assembly is used to pick up the end cover onto the piston rod assembly assembly, the piston rod feeding tray is used to feed the piston rod toward the piston rod feeding track, the piston rod picking assembly is used to grab the piston rod on the piston rod feeding track and assemble it with the end cover, and then place it on the transparent sleeve on the assembly jig for assembly; The cam rod feeding mechanism comprises a cam rod feeding tray, a cam rod feeding track and a cam rod picking assembly, one end of the cam rod feeding track is connected to the cam rod feeding tray, and the cam rod picking assembly is used to grab the cam rod on the cam rod feeding track and place it on the transparent sleeve; The clamping mechanism includes a clamping drive cylinder and a clamping block, which are used to clamp and assemble the cam rod onto the transparent sleeve; the inner piston assembly mechanism includes a material picking transmission module and a material picking assembly clamp, and the material picking assembly clamp is used to grab the assembled transparent sleeve and place it on the piston sleeve; A clamping assembly having the same structure as the clamping mechanism is arranged on one side of the circulation conveying mechanism, and the clamping assembly is used for pressing the transparent sleeve into the piston sleeve.

10. The automatic assembly line for medical injection practice pens according to claim 1, characterized in that: The cam sleeve assembly mechanism includes a cam sleeve feeding tray, a cam sleeve feeding track, a cam sleeve picking assembly and a cam orientation mechanism. One end of the cam sleeve feeding track is connected to the cam sleeve feeding tray. The cam sleeve picking assembly is provided with a plurality of cam sleeve picking jaws. The plurality of cam sleeve picking jaws are alternately driven to the cam sleeve feeding track, the cam orientation mechanism and the conveying fixture to assemble the cam sleeve on the cam rod. The inner spring assembly mechanism comprises an inner spring feeding tray, an inner spring feeding track and an inner spring picking assembly, one end of the inner spring feeding track is connected to the inner spring feeding tray, and the inner spring picking assembly is used to grab the inner spring on the inner spring feeding track and place it on the inner diameter of the cam rod; The tail cover assembly mechanism includes a tail cover feeding tray, a tail cover feeding track and a tail cover picking assembly, one end of the tail cover feeding track is connected to the tail cover feeding tray, and the tail cover picking assembly is used to grab the tail cover on the tail cover feeding track and assemble it to one end of the shell.

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