Needle type injection system assembling machine

Abstract

The needle type injection system assembling machine comprises a carrier mechanism, a lateral clamping mechanism, a material moving mechanism and a lateral material pushing mechanism, a pre-filling needle carrier of the carrier mechanism comprises a supporting seat, a bearing part and a first reset part, the bearing part can move between a first position and a second position, the first position is far away from the supporting seat, and the second position is far away from the supporting seat. The second position is close to the supporting seat, the first reset part is configured to enable the bearing part to deviate to the first position, the bearing part is used for bearing the pre-filling needles of the needle type injection system, and needle tips of the matched pre-filling needles with various lengths are all kept suspended. On one hand, the tops of the pre-filling needles with different lengths can be assembled with other parts at the same height to adapt to the pre-filling needles with different lengths, and on the other hand, the needle tip is always suspended in the air in the assembling process to prevent the needle tip from being in contact with a carrier or other parts, so that the risks of medicament pollution and needle tip damage are reduced; and the automation degree of assembly of the needle type injection system is improved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a needle injection system assembly machine. Background Technology

[0002] Traditional needle injection system assembly relies primarily on manual operation, requiring operators to manually assemble each component. Manual assembly is inefficient and inconsistent, impacting research and development progress and production validation. Furthermore, safety during assembly is difficult to control; unsanitary contact between the needle tip and external surfaces increases the risk of drug contamination or needle tip damage.

[0003] If assembly is performed using assembly equipment, the accuracy and stability of the assembly are difficult to guarantee. This is especially true for needle injection systems with various capacity specifications, where the parts vary in size. If a separate assembly equipment is designed for each specification of needle injection system, the research and development costs will increase significantly, and frequent mold changes or equipment adjustments will be required, reducing production flexibility.

[0004] Therefore, existing needle injection systems have low assembly efficiency, poor safety, and cannot meet the needs of assembling various specifications of needle injection systems. There is an urgent need to improve the automation rate of needle injection system assembly. Summary of the Invention

[0005] To address the issue of low automation rates in the assembly of commonly used needle injection systems, the present invention aims to provide a needle injection system assembly machine that is compatible with various specifications of needle injection systems, protects needle tip safety, and improves assembly efficiency and accuracy.

[0006] To achieve the above-mentioned objective, one embodiment of the present invention provides a needle injection system assembly machine, comprising: A carrier mechanism includes a pre-filled needle carrier, the pre-filled needle carrier including a support, a carrier member and a first reset part, the carrier member being movable between a first position away from the support and a second position close to the support, the first reset part being configured to bias the carrier member toward the first position, the carrier member being used to carry the pre-filled needle of the needle injection system, and the needle tips of the pre-filled needles of various lengths being kept suspended; The lateral clamping mechanism includes a pre-first clamping part for clamping the pre-charge needle; The transfer mechanism is configured to move the trigger of the needle injection system to a position aligned with the pre-filled needle, and drive the carrier to move from the first position to the second position, while keeping the pre-filled needle fixed under the clamping of the lateral clamping mechanism; A lateral feeding mechanism is configured to drive the side insert of the needle injection system to securely connect the pre-filled needle and the trigger.

[0007] As a further improvement of the present invention, the first reset part includes a first guide member and a first elastic member. The first guide member is fixedly connected to the support base. The first guide member includes a guide rod and a limiting cap. The limiting cap is disposed at one end away from the support base. The carrier member moves along the guide rod. The first elastic member drives the carrier member to move to the first position where it abuts against the limiting cap.

[0008] As a further improvement of the present invention, the material transfer mechanism includes a material transfer module, a lateral movement module and a longitudinal movement module. The lateral movement module drives the longitudinal movement module to move laterally, and the longitudinal movement module drives the material transfer module to move longitudinally. The material transfer module includes a gripping part, which includes a pair of material transfer grippers to grip the trigger.

[0009] As a further improvement of the present invention, the needle injection system assembly machine includes a pusher block, which is configured to drive the carrier to move from the first position to the second position during the process of the material transfer mechanism moving toward the carrier; The push block is provided on the side of the transfer clamp facing the carrier, and / or the push block is provided on the side of the carrier facing one of the transfer clamps.

[0010] As a further improvement of the present invention, the needle injection system assembly machine further includes a vertical movement module, which drives the carrier mechanism to reciprocate in a vertical direction, the vertical direction being perpendicular to the plane containing the transverse and longitudinal directions.

[0011] As a further improvement of the present invention, the clamping part further includes a first top block and a plurality of pairs of second top blocks, a clamping opening is formed between the pair of transfer clamps, the first top block is disposed at one end of the pair of transfer clamps away from the clamping opening, the plurality of pairs of second top blocks are elastically connected to the pair of transfer clamps, each pair of second top blocks is disposed opposite to the pair of transfer clamps, the plurality of pairs of second top blocks are disposed longitudinally on the pair of transfer clamps, the first top block and the second top blocks respectively abut against the ends of the triggers of different specifications to adapt to the triggers of different lengths.

[0012] As a further improvement of the present invention, the pre-charge needle includes a first protrusion, the carrier is provided with a first insertion hole, the carrier is provided with a second insertion hole, the first insertion hole and the second insertion hole are aligned in the longitudinal direction, the pre-charge needle is inserted into the first insertion hole and the second insertion hole in sequence, and the first protrusion is supported by the carrier to keep the needle tip suspended.

[0013] As a further improvement of the present invention, the vehicle mechanism includes a side-plug vehicle, the side-plug vehicle including a push rod and a second reset part, the second reset part guiding the push rod to extend along a first direction and driving the push rod away from the pre-charge member; The lateral pushing part is fixedly connected to the support base, and the lateral pushing mechanism abuts against the push rod to drive it to move towards the pre-filling needle.

[0014] As a further improvement of the present invention, the side plug carrier further includes a pair of guide blocks, a guide groove extending along the first direction is formed between the pair of guide blocks, the side plug is placed in the guide groove, and the push rod pushes the side plug to move along the guide groove through surface contact with the side plug; The carrier forms a clearance groove, and the guide block is inserted into the clearance groove so that the side plug is adjacent to the precharge pin.

[0015] As a further improvement of the present invention, the needle injection system assembly machine includes a photoelectric detection mechanism, which includes a first photoelectric unit, a second photoelectric unit, and a third photoelectric unit. The first photoelectric unit detects the side insert, the second photoelectric unit detects the pre-charge needle, and the third photoelectric unit detects the trigger.

[0016] Compared with commonly used technologies, the present invention has the following beneficial effects: This needle injection system assembly machine achieves multi-specification compatibility through the coordinated design of a pre-filled needle carrier, a lateral clamping mechanism, a transfer mechanism, and a lateral pushing mechanism. The pre-filled needle carrier, through the cooperation of a support base, a carrier component, and a first reset part, allows the tops of pre-filled needles of different lengths to be assembled with other parts at the same height, thus adapting to pre-filled needles of different lengths. On the other hand, it keeps the needle tip suspended during the assembly process, avoiding contact between the needle tip and the carrier or other components, reducing the risk of drug contamination and needle tip damage. Furthermore, the precise movement of the transfer mechanism and the lateral pushing mechanism driving the side plug to complete a firm connection reduce manual intervention while being compatible with multiple specifications of needle injection systems, thus improving the automation level of needle injection system assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a needle injection system assembly machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a needle injection system assembly machine according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a needle injection system assembly machine according to an embodiment of the present invention; Figure 4 This is an exploded view of a needle injection system according to an embodiment of the present invention; Figure 5This is a schematic diagram of the structure of a lateral clamping mechanism and a lateral pushing mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a vehicle mechanism according to an embodiment of the present invention; Figure 7 This is a top view of a vehicle mechanism according to an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of a material transfer module according to an embodiment of the present invention; Figure 9 This is a side view of a material transfer module according to an embodiment of the present invention; Among them, 100 is a needle injection system assembly machine; 10 is a carrier mechanism; 11 is a side insert carrier; 111 is a push rod; 112 is a second reset part; 113 is a guide block; 1130 is a guide groove; 12 is a pre-charged needle carrier; 121 is a support base; 1211 is a second insertion hole; 122 is a carrier; 1220 is a clearance groove; 123 is a first reset part; 1231 is a first elastic element; 1232 is a first guide element; 13 is a trigger carrier; 14 is a needle receiving carrier; 15 is an intermediate layer carrier; 16 is a pen cap carrier; 17 is an outer sleeve carrier; 20 is a lateral clamping mechanism; 21 is a first clamping part; 22 is a second clamping part; 23 is a third clamping part; 24 is a fourth clamping part; 30 is a material transfer mechanism; 31 is a lateral movement module; 32 is a longitudinal movement module; 33. Material transfer module; 331. Clamping part; 3311. Material transfer clamp; 3312. First top block; 3313. Second top block; 3314. Clamp head; 3315. Push block; 332. Elastic pressing part; 3321. Pressing head; 3322. First abutment block; 3323. Buffer; 3324. Second abutment block; 40. Lateral pushing mechanism; 50. Vertical moving module; 60. Photoelectric detection mechanism; 61. First photoelectric unit; 62. Second photoelectric unit; 63. Third photoelectric unit; 64. Fourth photoelectric unit; 65. Fifth photoelectric unit; 66. Sixth photoelectric unit; 67. Seventh photoelectric unit; 70. Needle injection system; 71. Side insert; 72. Pre-charge needle; 73. Trigger; 74. Needle retractor; 75. Intermediate layer; 76. Pen cap; 77. Outer sleeve. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0019] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative position” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0020] One embodiment of the present invention provides a needle injection system assembly machine, which enables efficient and precise assembly of needle injection system components, and is particularly suitable for assembling various specifications of needle injection systems.

[0021] The needle injection system of this embodiment includes, but is not limited to, pen-type syringes. For example, some products, especially syringes with electronic systems, are no longer "pen-type" in shape.

[0022] The needle injection system described in this embodiment is suitable for drugs requiring highly precise dosage, such as insulin, growth hormone, follicle-stimulating hormone, parathyroid hormone, and interferon. Taking an insulin pen as an example, the needle injection system is favored by patients due to its advantages such as accurate dosage, simple operation, and convenient portability.

[0023] The needle injection system assembly machine 100 in this embodiment is as follows: Figure 1 and 2 As shown, the assembly system includes a carrier mechanism 10, a lateral clamping mechanism 20, a material transfer mechanism 30, and a lateral pushing mechanism 40. Through the coordinated operation of the carrier mechanism 10, the lateral clamping mechanism 20, the material transfer mechanism 30, and the lateral pushing mechanism 40, the assembly system achieves high-precision assembly of the needle injection system 70.

[0024] Needle injection system 70 Figure 3 As shown, the system includes a side insert 71, a pre-charge needle 72, a trigger 73, a needle retractor 74, an intermediate layer 75, a pen cap 76, and an outer sleeve 77. The assembly process is as follows: First, the pre-charge needle 72 and the trigger 73 are fixedly connected through the side insert 71, then snapped together with the needle retractor 74, and then snapped together with the intermediate layer 75 to form an internal component. After the internal component is installed into the outer sleeve 77 and assembled with it, the pen cap 76 is put on to complete the assembly of the needle injection system 70.

[0025] Different sizes of needle injection systems 70 have different dimensions of some parts. For example, the 0.5ml and 1ml needle injection systems 70 have shorter pre-filled needles 72 and longer pre-filled needles 72. Also, some needle injection systems 70 have shorter triggers 73 and outer sleeves 77 for the 0.5ml size and longer triggers 73 and outer sleeves 77 for the 1ml size. The needle injection system assembly machine 100 of this embodiment is adapted to the assembly needs of needle injection systems 70 of different sizes.

[0026] like Figure 4 , 6 As shown in Figures 7 and 8, the carrier mechanism 10 includes a base, and a side insert carrier 11, a pre-charge needle carrier 12, a trigger carrier 13, a retractor carrier 14, an intermediate layer carrier 15, a pen cap carrier 16, and an outer sleeve carrier 17 arranged sequentially on the base. Before assembly, each part is loaded onto the corresponding carrier.

[0027] To clearly express the positions and directions described in this embodiment, in this embodiment, the direction from the side plug-in carrier 11 to the outer sleeve carrier 17 is defined as arranged sequentially from left to right, with the opposite direction being left. The base is located below these carriers, with the opposite direction being up. The two sides perpendicular to the plane containing the top, bottom, left, and right are respectively front and rear.

[0028] In this embodiment, the horizontal direction is parallel to the left-right direction, and the vertical direction is parallel to the up-down direction.

[0029] The pre-charge needle carrier 12 includes a support base 121, a carrier 122, and a first reset part 123.

[0030] The support base 121 is fixedly connected to the base. The support base 121 extends upward to provide stable support for the load-bearing member 122 and the first reset part 123. The support base 121 can be a cantilever beam structure, extending out of the support platform to load the load-bearing member 122 and the first reset part 123 above.

[0031] The carrier 122 is a movable component that can move back and forth between a first position (the initial state away from the support 121) and a second position (the assembled state close to the support 121). In this embodiment, the second position is located directly below the first position.

[0032] The pre-charge needle 72 has a first protrusion, which is supported by the upper surface of the support member 122 when it is supported by the support member 122.

[0033] The first reset part 123 is used to drive the carrier 122 back to the first position when no external force is applied. The first reset part 123 may be an elastic element, a gas spring, or other structure. After the carrier 122 moves to the second position and the external force is removed, it drives the carrier 122 back to the first position.

[0034] The pre-filled needle 72 is supported by the carrier 122, and the needle tip of the pre-filled needle 72 of various lengths is kept suspended, such as the pre-filled needle 72 of the 0.5ml or 1ml needle injection system 70 mentioned above.

[0035] When the pre-charge needle carrier 12 is inserted, the carrier 122 supports the top of the pre-charge needle 72, keeping the needle tip suspended in the support base 121. On the one hand, the top of the pre-charge needles 72 of various lengths is kept at the same height, only the height of the needle tip ends is different, which can automatically adapt to multiple pre-charge needle 72 models and reduce the complexity of debugging multiple devices. On the other hand, it avoids the needle tip from contacting any surface, significantly reducing the risk of needle tip damage or drug contamination, and meets the high cleanliness standards of drug production.

[0036] like Figure 5 As shown, the lateral clamping mechanism 20 includes a first clamping part 21, a second clamping part 22, a third clamping part 23 and a fourth clamping part 24. In this embodiment, the first clamping part 21 is used to clamp the pre-filling needle 72.

[0037] The first clamping part 21 consists of a pair of symmetrical clamping arms. The clamping arms are controlled to open and close by a pneumatic or electric actuator, clamping the pre-charged needle 72 from the side of its tube wall to avoid contact with the needle tip. The opening and closing stroke of the clamps is adjustable to accommodate pre-charged needles 72 of different diameters.

[0038] The transfer mechanism 30 is configured to move the trigger 73 of the needle injection system 70 to a position aligned with the pre-charge needle 72 and drive the carrier 122 to move from a first position to a second position, while the pre-charge needle 72 is held in place by the lateral clamping mechanism 20.

[0039] The transfer mechanism 30 is responsible for moving the trigger 73 to a position aligned with the pre-charge needle 72 and driving the carrier 122 to complete the position switch. The transfer mechanism 30 moves downward, and while moving the trigger 73 downward to align with the pre-charge needle 72, it also presses the carrier 122 down to the second position.

[0040] The lateral pusher mechanism 40 is configured to drive the side insert 71 of the needle injection system 70 to fix the pre-charge needle 72 and the trigger 73. The lateral pusher mechanism 40 is aligned between the trigger 73 and the pre-charge needle 72, and the side insert 71 is inserted into the pre-charge needle 72 and the trigger 73 at the same time to complete the fixation. The lateral pusher mechanism 40 uses a cylinder or motor to provide the thrust.

[0041] The assembly process of the precharge pin 72, trigger 73, and side plug 71 is as follows: The pre-charge needle 72 is inserted into the pre-charge needle carrier 12, the first protrusion is supported by the upper surface of the carrier 122, and the needle tip at the lower end of the pre-charge needle 72 is suspended in the air.

[0042] When the carrier mechanism 10 is in the assembly position, the first clamping part 21 clamps the side of the pre-charge needle 72, keeping the pre-charge needle 72 fixed.

[0043] The material transfer mechanism 30 moves downward, aligning the trigger 73 with the pre-charge needle 72. During the downward movement, the carrier 122 is simultaneously driven to move to the second position. Since the pre-charge needle 72 is clamped and fixed by the first clamping part 21, the first protrusion above the pre-charge needle 72 separates from the carrier 122, and space is reserved below the first protrusion for the insertion of the side plug 71.

[0044] The lateral pusher mechanism 40 is activated, pushing the side plug 71 to move laterally. The side plug 71 is inserted into the connection between the pre-charge needle 72 and the trigger element 73, thus completing the fixation.

[0045] After assembly, the material transfer mechanism 30 moves upward, the lateral pushing mechanism 40 resets, and the carrier 122 resets under the drive of the first reset part 123.

[0046] The spring design of the second reset part 112 enables the push rod 111 to automatically reset after assembly, reducing cycle time and improving automation efficiency.

[0047] Through the synergistic effect of the aforementioned mechanisms, the carrier mechanism 10 ensures that the tip of the pre-filled needle 72 remains suspended throughout the process, meeting the high cleanliness requirements of pharmaceutical production. Furthermore, one device is compatible with multiple pre-filled needle 72 specifications, reducing the cost of multiple devices.

[0048] like Figure 6 , 7 As shown, the first reset part 123 includes a first guide member 1232 and a first elastic member 1231. The first guide member 1232 is fixedly connected to the support base 121. The first guide member 1232 includes a guide rod and a limiting cap. The limiting cap is disposed at one end away from the support base 121. The carrier member 122 moves along the guide rod. The first elastic member 1231 drives the carrier member 122 to move to a first position that abuts against the limiting cap.

[0049] The first guide member 1232 consists of a guide rod and a limiting cap. The guide rod is a cylindrical metal rod, fixed to the support base 121 and extending in the vertical direction. The limiting cap is located at the top of the guide rod (the end away from the support base 121), and its diameter is larger than that of the guide rod to prevent the carrier member 122 from moving excessively during resetting. The surface of the guide rod is smooth to reduce frictional resistance and ensure smooth movement of the carrier member 122. Figure 6 , 7 In the middle, four first guide members 1232 are provided, located at the four corners of the rectangle, and are set as countersunk screws.

[0050] The first elastic element 1231 is a compression spring, and two sets are provided, each set between two adjacent first guide elements 1232. One end of the compression spring abuts against the support seat 121, and the other end abuts against the carrier element 122. When the carrier element 122 is subjected to an external force (such as the downward force of the transfer mechanism 30) and moves from the first position to the second position, the first elastic element 1231 is compressed; when the external force is released, the elastic force of the first elastic element 1231 drives the carrier element 122 to move upward along the guide rod until it abuts against the limit cap and returns to the first position.

[0051] Furthermore, such as Figure 2 As shown, the material transfer mechanism 30 includes a material transfer module 33, a lateral movement module 31, and a longitudinal movement module 32. The lateral movement module 31 drives the longitudinal movement module 32 to move laterally, and the longitudinal movement module 32 drives the material transfer module 33 to move longitudinally. The material transfer module 33 includes a gripping part 331, which includes a pair of material transfer clamps 3311 to grip the trigger 73.

[0052] Both the lateral movement module 31 and the longitudinal movement module 32 consist of linear guide rails and servo motors. The guide rail of the lateral movement module 31 is mounted on the frame of the needle injection system assembly machine 100 along the left-right direction. The servo motor drives the longitudinal movement module 32 and the material transfer module 33 to move along the guide rails via gear transmission, achieving horizontal positioning. The guide rail of the longitudinal movement module 32 is mounted along the vertical direction, driving the material transfer module 33 to move and position itself in the vertical direction.

[0053] like Figure 8 and 9 As shown, the gripping part 331 consists of a pair of pneumatic transfer clamps 3311. The transfer clamps 3311 are controlled to open and close by a cylinder, and grip the trigger member 73. The end of the gripping arm is provided with a chuck 3314, and the chuck 3314 has a V-shaped structure to ensure stable gripping.

[0054] Furthermore, the needle injection system assembly machine 100 includes a pusher block 3315, which is configured to drive the carrier 122 from a first position to a second position during the movement of the transfer mechanism 30 toward the carrier 122.

[0055] A push block 3315 is provided on the side of one of the transfer clamps 3311 facing the support member 122, and / or, a push block 3315 is provided on the side of the support member 122 facing one of the transfer clamps 3311.

[0056] The contact surface of the push block 3315 is a plane or a surface that conforms to the surface of the other side. The height and position of the push block 3315 are precisely designed to ensure that it can accurately abut against the carrier 122 when the transfer clamp 3311 is pressed down, without affecting other parts.

[0057] This embodiment Figure 8 and9 The pusher block 3315 is installed at the lower end of one of its chucks 3314. Figure 6 The upper surface of the middle support member 122 is also provided with a protrusion that connects with the push block 3315.

[0058] like Figure 2 and 3 As shown, the needle injection system assembly machine 100 also includes a vertical movement module 50, which drives the carrier mechanism 10 to reciprocate in the vertical direction, which is perpendicular to the plane containing the transverse and longitudinal directions.

[0059] The vertical movement module 50 is installed below the base and drives the base to move in the front-to-back direction. When it is necessary to load various parts on the carrier mechanism 10, the vertical movement module 50 moves the carrier mechanism 10 to the front. After loading is completed, the carrier mechanism 10 is moved to the rear, which facilitates the loading of parts of the needle injection system 70.

[0060] like Figure 9 As shown, the clamping part 331 also includes a first top block 3312 and several pairs of second top blocks 3313. A clamping opening is formed between a pair of transfer clamps 3311. The first top block 3312 is disposed at one end of the pair of transfer clamps 3311 away from the clamping opening. Several pairs of second top blocks 3313 are elastically connected to a pair of transfer clamps 3311. Each pair of second top blocks 3313 is disposed opposite to a pair of transfer clamps 3311. Several pairs of second top blocks 3313 are disposed longitudinally on a pair of transfer clamps 3311. The first top block 3312 and the second top block 3313 respectively abut against the ends of trigger members 73 of different specifications to adapt to trigger members 73 of different lengths.

[0061] The first top block 3312 is fixed relative to the cylinder position of the clamping part 331, located above the other second top blocks 3313, and does not move with the movement of the transfer clamp 3311.

[0062] Several pairs of second top blocks 3313 are elastically connected to the transfer clamp 3311 by springs, and each pair of top blocks is arranged opposite to each other on the transfer clamp 3311. Figure 9 A pair of second top blocks 3313 are shown, that is, the clamping part 331 of this embodiment can be adapted to two specifications of trigger 73. If there is a need to assemble trigger 73 of more length specifications, more pairs of second top blocks 3313 can be arranged in the vertical direction.

[0063] During assembly, for longer trigger elements 73, such as the trigger element 73 corresponding to a 1ml needle injection system 70, when the transfer clamp 3311 clamps, the second top block 3313 clamps the side wall of the trigger element 73, and the top of the trigger element 73 abuts against the first top block 3312. When the transfer module 33 presses down, the side of the trigger element 73 is clamped by the transfer clamp 3311, and the upper end is limited by the first top block 3312, thereby stably pressing down the trigger element 73.

[0064] For shorter triggers 73, such as the trigger 73 corresponding to a 0.5ml syringe injection system 70, when the transfer clamp 3311 clamps, the second top block 3313 is brought closer by the spring. The top of the trigger 73 abuts against the lower surface of the second top block 3313. When the transfer module 33 presses down, the side of the trigger 73 is held by the transfer clamp 3311, and the upper end is limited by the second top block 3313, thereby stably pressing down the trigger 73.

[0065] Furthermore, such as Figure 6 As shown, the carrier 122 is provided with a first insertion hole and a second insertion hole 1211. The first insertion hole and the second insertion hole 1211 are aligned in the longitudinal direction. The pre-charge needle 72 is inserted into the first insertion hole and the second insertion hole 1211 in sequence. The first protrusion is supported by the carrier 122 to keep the needle tip suspended.

[0066] The first protrusion at the top of the pre-charge pin 72 is supported by the upper edge of the first socket, causing the pin tip to suspend below the second socket 1211. The diameter of the socket is slightly larger than the diameter of the pre-charge pin 72 to ensure smooth insertion and stable positioning.

[0067] The top of the first protrusion pre-charge pin 72 is designed with a ring or waist-shaped first protrusion. The outer diameter of the first protrusion is larger than the diameter of the first socket. When the pre-charge pin 72 is inserted, the first protrusion is supported by the edge of the first socket to prevent the pre-charge pin 72 from falling.

[0068] Furthermore, such as Figure 6 and 7 As shown, the vehicle mechanism 10 includes a side-mounted vehicle 11, which includes a push rod 111 and a second reset part 112. The second reset part 112 guides the push rod 111 to extend along a first direction and drives the push rod 111 away from the pre-charged component.

[0069] The lateral pushing part is fixedly connected to the support base 121, and the lateral pushing mechanism 40 abuts against the push rod 111 to drive it to move in the direction of the pre-filling needle 72.

[0070] The push rod 111 has a long strip structure. The end of the push rod 111 near the side plug 71 has a similar surface shape to the side plug 71. In this embodiment, both are arc-shaped, which plays a role in positioning and stabilizing the push.

[0071] The second guide is a guide groove or guide rail fixed to the support base 121, extending along the first direction (i.e., the insertion direction of the side plug 71, i.e., the left-right direction). The second elastic element is a compression spring, installed between the push rod 111 and the support base 121, which drives the push rod 111 away from the pre-charge pin 72 direction when no external force is applied, maintaining the initial reset state.

[0072] The lateral drive unit is an independent cylinder or servo motor, which is set separately from the lateral push unit and mounted on the frame of the needle injection system assembly machine 100. During assembly, the piston rod of the cylinder or the drive shaft of the motor abuts against the tail end of the push rod 111, and drives the push rod 111 to move in the direction of the pre-charge needle 72 by thrust.

[0073] Furthermore, the side insert carrier 11 also includes a pair of guide blocks 113, with a guide groove 1130 extending in a first direction formed between the pair of guide blocks 113. The side insert 71 is placed in the guide groove 1130, and the push rod 111 pushes the side insert 71 to move along the guide groove 1130 through surface contact with the side insert 71.

[0074] The carrier 122 forms a clearance groove 1220, and the guide block 113 is inserted into the clearance groove 1220 so that the side plug 71 is adjacent to the precharge pin 72.

[0075] The guide groove 1130 is elongated and is set along the first direction (the insertion direction of the side plug 71, i.e., the left-right direction). The width of the guide groove 1130 is slightly larger than the width of the side plug 71 to ensure that the side plug 71 can slide smoothly. The side plug 71 is placed in the guide groove 1130 and is pushed by the push rod 111 through surface contact. The contact surface is designed to be flat or slightly curved to increase the contact area and stabilize the push.

[0076] Figure 7 In the middle, the carrier 122 is provided with a relief groove 1220. The carrier 122 is I-shaped, and the relief groove 1220 is located on the side of the carrier 122 near the lateral pushing mechanism 40. The relief groove 1220 is a rectangular or U-shaped groove that allows the guide block 113 to be inserted into it, so that the side plug 71 mates with it closer to the first protrusion.

[0077] The assembly process of the lateral pushing mechanism 40 is as follows: In the initial state, the second elastic element positions the push rod 111 away from the pre-charge pin 72, and the side insert 71 is placed in the guide groove 1130.

[0078] When the carrier 122 moves to the second position (near the support 121), the lateral pusher mechanism 40 is activated, the piston rod or drive shaft abuts against the push rod 111, driving it to move along the second guide towards the pre-charge needle 72, and the push rod 111 pushes the side insert 71 to move along the guide groove 1130 until it moves to the position adjacent to the pre-charge needle 72. The push rod 111 pushes the side plug 71 to insert into the connection between the precharge pin 72 and the trigger 73, thus completing the fixation. After the lateral pushing mechanism 40 retracts, the second elastic element drives the push rod 111 to reset, ready for the next assembly.

[0079] Furthermore, such as Figure 2 , 3 As shown in Figure 5, the needle injection system assembly machine 100 includes a photoelectric detection mechanism 60. The photoelectric detection mechanism 60 includes a first photoelectric unit 61, a second photoelectric unit 62, a third photoelectric unit 63, a fourth photoelectric unit 64, a fifth photoelectric unit 65, a sixth photoelectric unit 66, and a seventh photoelectric unit 67. The first photoelectric unit 61 detects the side plug-in 71, the second photoelectric unit 62 detects the pre-charge needle 72, the third photoelectric unit 63 detects the trigger element 73, the fourth photoelectric unit 64 detects the needle receiving element 74, the fifth photoelectric unit 65 detects the intermediate layer 75, the sixth photoelectric unit 66 detects the pen cap 76, and the seventh photoelectric unit 67 detects the outer sleeve 77.

[0080] These optoelectronic components use infrared optoelectronic sensors or laser optoelectronic sensors to detect the presence of corresponding parts in the needle injection system 70. Based on the emitted and received light signals, they determine whether each part is in place. If any part is not placed in place on the carrier mechanism 10, assembly will not be performed, thus preventing assembly errors, reducing defect rates, achieving automated detection and feedback, and improving the intelligence level of the production line.

[0081] like Figure 5 As shown, the second clamping part 22 in this embodiment includes a pair of positioning clamps. When the pair of positioning clamps are clamped, they enclose a positioning hole. The positioning hole is aligned with the needle receiving member 74 in the longitudinal direction. The positioning hole is configured to guide the pre-charged needle 72 to be inserted into the needle receiving member 74 in the longitudinal direction.

[0082] The second clamping part 22 is installed above the needle take-up carrier 14. The two positioning clamps together form a positioning hole. The positioning hole is circular and its diameter is larger than the diameter of the needle tube of the pre-filled needle 72. The central axis of the positioning hole is precisely aligned with the mounting hole of the needle take-up part 74.

[0083] During assembly, the material transfer mechanism 30 moves the pre-charged needle 72 above the positioning hole, and the positioning clamp clamps it to form the positioning hole, guiding the pre-charged needle 72 to be inserted longitudinally into the needle receiving part 74.

[0084] During the downward insertion of the pre-charge pin 72 into the retractor 74, the positioning hole restricts the lateral movement of the pre-charge pin 72, ensuring accurate insertion path. This prevents some pre-charge pins 72 from being too long, causing the lower tip to deviate from the hole in the retractor 74 due to excessive swing.

[0085] That is, the second clamping part 22 prevents the pre-charged needle 72 from shifting or shaking during the assembly process, and at the same time, the second clamping part 22 prevents the tip of the pre-charged needle 72 from directly contacting the clamp, thus protecting the integrity and cleanliness of the needle tip.

[0086] After the pre-charge needle 72 begins to enter the hole of the needle take-up piece 74, a pair of positioning clamps are released, allowing the transfer module 33 to continue pressing down until the pre-charge needle 72 and the needle take-up piece 74 are tightly inserted.

[0087] like Figure 5 As shown, one of the multiple clamping units is a third clamping part 23, which includes a pair of tightening clamps. The intermediate layer 75 includes multi-lobed sidewalls with gaps between adjacent sidewalls. The pair of tightening clamps clamp the multi-lobed sidewalls to reduce the gaps between adjacent sidewalls, so as to facilitate the insertion of the needle receiving member 74.

[0088] The third clamping part 23 is installed next to the intermediate layer carrier 15 and uses pneumatic drive to achieve the clamping action. Figure 4 The middle layer 75 includes two side walls that form a U-shaped opening. During the assembly process, the transfer mechanism 30 moves the needle take-up piece 74 above the middle layer 75. The tightening clamp of the third clamping part 23 is activated to clamp the two side walls until the needle take-up piece 74 moves down to the appropriate position. Then, the pair of tightening clamps are released so that the needle take-up piece 74 and the middle layer 75 are assembled in place.

[0089] Furthermore, the outer sleeve 77 includes a limiting hole and a mounting hole, the limiting hole being located above the mounting hole, and the middle layer 75 includes a snap-fit ​​portion for mating with the mounting hole.

[0090] The outer casing 77 is the outer housing of the needle injection system 70. Its side wall has a limiting hole and a mounting hole located below the limiting hole. The limiting hole is configured to provide a limiting function when the needle injection system 70 is in the activated state, restricting the movement trajectory of internal components (such as the trigger 73) during activation. The mounting hole is used to mate with the snap-fit ​​portion of the intermediate layer 75, forming a secure snap-fit ​​connection. The intermediate layer 75 is the internal support structure of the needle injection system 70. The snap-fit ​​portion is a protruding structure, and its shape matches both the limiting hole and the mounting hole. After insertion, it is fixed by a snap-fit ​​mechanism. During assembly in the unactivated state, if the limiting hole is not sealed, the snap-fit ​​portion may mistakenly snap into the limiting hole, resulting in incomplete assembly.

[0091] like Figure 5 As shown, one of the multiple clamping units is a fourth clamping part 24. The fourth clamping part 24 includes a pair of limiting clamps. The pair of limiting clamps align with the limiting holes and block the limiting holes when clamping, so that the snap-fit ​​part avoids the limiting holes when the internal components are installed downwards.

[0092] The limiting clamp is installed next to the limiting hole on the outer sleeve carrier 17. The clamping end of the limiting clamp is designed to be a flat or arc shape that matches the shape of the limiting hole, so as to completely block the limiting hole when clamped.

[0093] The outer sleeve 77 is placed in the positioning groove of the outer sleeve carrier 17, with the limiting hole and the mounting hole facing the horizontal plane. The material transfer mechanism 30 moves the intermediate layer 75 above the outer sleeve 77. During the downward insertion process, the snap-fit ​​part is aligned with the limiting hole and the mounting hole in sequence, but the limiting hole is blocked by the limiting clamp to prevent the snap-fit ​​part from accidentally snapping into the limiting hole. The intermediate layer 75 continues to move downward until the snap-fit ​​part is inserted into the mounting hole along the longitudinal direction, and the docking is completed.

[0094] The fourth clamping part 24 serves two purposes: firstly, it fixes the outer sleeve 77, and secondly, it ensures that the snap-fit ​​part of the middle layer 75 is accurately inserted into the mounting hole, avoiding improper assembly caused by the snap-fit ​​part being stuck in the limiting hole.

[0095] Furthermore, such as Figure 8 As shown, the transfer module 33 includes an elastic pressing part 332. The elastic pressing part 332 includes a frame and a pressing head 3321, a first abutting block 3322, a buffer 3323 and a second abutting block 3324 arranged longitudinally on the frame. The pressing head 3321 is fixed to the first abutting block 3322. The buffer 3323 is elastically supported between the first abutting block 3322 and the second abutting block 3324. The second abutting block 3324 is adjustablely connected to the frame in the longitudinal direction. The pressing head 3321 is configured to push the internal components and the pen cap 76 into the outer sleeve 77 respectively.

[0096] The elastic pressing part 332 solves the problem that the clamping part 331 cannot reach the assembly height due to interference from the outer sleeve 77, and protects the product through elastic deformation. The elastic pressing part 332 and the clamping part 331 are arranged in the left-right direction.

[0097] The frame moves together with the gripping part 331, and can move up, down, left, and right under the action of the horizontal moving module 31 and the vertical moving module 32.

[0098] The end shape of the pressing head 3321 matches the top of the intermediate layer 75 and the pen cap 76, and its end diameter is smaller than the inner diameter of the outer sleeve 77, allowing it to fully enter the outer sleeve 77 for pressing. The pressing head 3321 is fixed to the first abutment block 3322, which transmits the pressing force. The buffer 3323 can be a compression spring, installed between the first abutment block 3322 and the second abutment block 3324, configured to absorb impact force during pressing and protect the parts. The second abutment block 3324 is connected to the frame by bolts or a groove, and its longitudinal position is adjustable to adapt to different assembly depths.

[0099] The assembly process is as follows: The gripping part 331 (gripper) of the transfer module 33 grasps the intermediate layer 75 or the pen cap 76, moves it above the outer sleeve 77 and releases the part, so that it is initially placed inside the outer sleeve 77. Because the side wall of the outer sleeve 77 interferes with the gripper, the gripper cannot descend to the required assembly height.

[0100] The lateral movement module 31 moves to align the elastic pressing part 332 with the outer sleeve 77, and the longitudinal movement module 32 drives the elastic pressing part 332 to move downward. The end of the pressing head 3321 enters the interior of the outer sleeve 77 and abuts against the top of the middle layer 75 or the pen cap 76. It is then pushed completely into the outer sleeve 77 by longitudinal pressing until it is assembled in place.

[0101] During the pressing process, the spring of the buffer 3323 is compressed to absorb excess impact force and prevent the intermediate layer 75 or pen cap 76 from being damaged by excessive pressure.

[0102] After assembly, the elastic pressing part 332 moves upward, the spring returns to its original state, and the pressing head 3321 resets, ready for the next round of assembly.

[0103] The end of the pressing head 3321 can fully enter the outer sleeve 77, overcoming the limitation that the grippers cannot reach the assembly height due to interference from the outer sleeve 77, ensuring the precise assembly of the intermediate layer 75 and the pen cap 76; the spring deformation of the buffer 3323 absorbs the impact force during the pressing process, protecting the intermediate layer 75 and pen cap 76 from excessive pressure damage, and improving the yield rate.

[0104] Furthermore, the second abutment block 3324 is connected to the frame by bolts or a slide groove, and its length can be adjusted to achieve different amounts of downward pressure of the pressing head 3321. That is, when the second abutment block 3324 moves upward, the pressing head 3321 can be inserted deeper, and vice versa. This allows the needle injection system assembly machine 100 to handle outer sleeves 77 of different specifications, enhancing the versatility of the assembly system.

[0105] Compared with commonly used technologies, this embodiment has the following beneficial effects: The needle injection system assembly machine 100 achieves multi-specification compatibility through the coordinated design of the pre-filled needle carrier 12, the lateral clamping mechanism 20, the transfer mechanism 30, and the lateral pushing mechanism 40. The pre-filled needle carrier 12, through the cooperation of the support base 121, the carrier 122, and the first reset part 123, allows the tops of pre-filled needles 72 of different lengths to be assembled with other parts at the same height, thus adapting to pre-filled needles 72 of different lengths. On the other hand, it keeps the needle tip suspended during the assembly process, avoiding contact between the needle tip and the carrier or other parts, reducing the risk of drug contamination and needle tip damage. Furthermore, the precise movement of the transfer mechanism 30 and the lateral pushing mechanism 40 driving the side plug 71 to complete a firm connection reduce manual intervention while being compatible with multiple specifications of needle injection systems 70, thus improving the automation level of needle injection system 70 assembly.

[0106] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0107] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A needle injection system assembly machine, characterized in that, include: A carrier mechanism includes a pre-filled needle carrier, the pre-filled needle carrier including a support, a carrier member and a first reset part, the carrier member being movable between a first position away from the support and a second position close to the support, the first reset part being configured to bias the carrier member toward the first position, the carrier member being used to carry the pre-filled needle of the needle injection system, and the needle tips of the pre-filled needles of various lengths being kept suspended; The lateral clamping mechanism includes a pre-first clamping part for clamping the pre-charge needle; The transfer mechanism is configured to move the trigger of the needle injection system to a position aligned with the pre-filled needle, and drive the carrier to move from the first position to the second position, while keeping the pre-filled needle fixed under the clamping of the lateral clamping mechanism; A lateral feeding mechanism is configured to drive the side insert of the needle injection system to securely connect the pre-filled needle and the trigger.

2. The needle injection system assembly machine according to claim 1, characterized in that, The first reset part includes a first guide member and a first elastic member. The first guide member is fixedly connected to the support base. The first guide member includes a guide rod and a limiting cap. The limiting cap is disposed at one end away from the support base. The carrier member moves along the guide rod. The first elastic member drives the carrier member to move to the first position where it abuts against the limiting cap.

3. The needle injection system assembly machine according to claim 1, characterized in that, The material transfer mechanism includes a material transfer module, a lateral movement module, and a longitudinal movement module. The lateral movement module drives the longitudinal movement module to move laterally, and the longitudinal movement module drives the material transfer module to move longitudinally. The material transfer module includes a gripping part, which includes a pair of material transfer grippers to grip the trigger.

4. The needle injection system assembly machine according to claim 3, characterized in that, The needle injection system assembly machine includes a pusher block, which is configured to drive the carrier to move from the first position to the second position during the process of the material transfer mechanism moving towards the carrier; The push block is provided on the side of the transfer clamp facing the carrier, and / or the push block is provided on the side of the carrier facing one of the transfer clamps.

5. The needle injection system assembly machine according to claim 3, characterized in that, The needle injection system assembly machine also includes a vertical movement module, which drives the carrier mechanism to reciprocate in a vertical direction, the vertical direction being perpendicular to the plane containing the transverse and longitudinal directions.

6. The needle injection system assembly machine according to claim 3, characterized in that, The clamping part further includes a first top block and several pairs of second top blocks. A clamping opening is formed between the pair of transfer clamps. The first top block is disposed at one end of the pair of transfer clamps away from the clamping opening. The several pairs of second top blocks are elastically connected to the pair of transfer clamps. Each pair of second top blocks is disposed opposite to the pair of transfer clamps. The several pairs of second top blocks are disposed longitudinally on the pair of transfer clamps. The first top block and the second top blocks respectively abut against the ends of the triggers of different specifications to adapt to triggers of different lengths.

7. The needle injection system assembly machine according to claim 1, characterized in that, The pre-charge needle includes a first protrusion, the carrier has a first insertion hole, the carrier has a second insertion hole, the first insertion hole and the second insertion hole are aligned in the longitudinal direction, the pre-charge needle is inserted into the first insertion hole and the second insertion hole in sequence, and the first protrusion is supported by the carrier to keep the needle tip suspended.

8. The needle injection system assembly machine according to claim 1, characterized in that, The vehicle mechanism includes a side-mounted vehicle, the side-mounted vehicle including a push rod and a second reset part, the second reset part guiding the push rod to extend along a first direction and driving the push rod away from the pre-charged component; The lateral pushing part is fixedly connected to the support base, and the lateral pushing mechanism abuts against the push rod to drive it to move towards the pre-filling needle.

9. The needle injection system assembly machine according to claim 8, characterized in that, The side insert carrier also includes a pair of guide blocks, with a guide groove extending along the first direction formed between the pair of guide blocks. The side insert is placed in the guide groove, and the push rod pushes the side insert to move along the guide groove through surface contact with the side insert. The carrier forms a clearance groove, and the guide block is inserted into the clearance groove so that the side plug is adjacent to the precharge pin.

10. The needle injection system assembly machine according to claim 1, characterized in that, The needle injection system assembly machine includes a photoelectric detection mechanism, which includes a first photoelectric unit, a second photoelectric unit, and a third photoelectric unit. The first photoelectric unit detects the side insert, the second photoelectric unit detects the pre-charge needle, and the third photoelectric unit detects the trigger.

Images