Needle injection system assembly device

Abstract

This utility model discloses a needle injection system assembly device, including a carrier mechanism and a transfer mechanism. The carrier mechanism includes multiple carrier units arranged laterally, each carrier unit configured to support different parts of the needle injection system. The transfer mechanism includes a transfer module and a drive module that drives the transfer module to move laterally and longitudinally, sequentially connecting at least some internal parts to form internal components by longitudinal pressing, and fixing the internal components within external parts. This needle injection system assembly device significantly reduces manual intervention through the automated collaboration of the carrier mechanism and the transfer mechanism. By sequentially assembling parts using longitudinal pressing, it ensures the accuracy of the assembly process and product consistency, achieving precise and efficient assembly, and providing an innovative solution for needle injection system assembly.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a needle injection system assembly device. Background Technology

[0002] Needle injection systems are widely used quantitative injection devices in the medical field, and their assembly process is of great significance in research and development and production. Traditional needle injection system assembly mainly relies on manual operation, requiring operators to manually assemble multiple parts. However, manual assembly is inefficient, inconsistent, and prone to operator fatigue, resulting in slow assembly speed, low assembly accuracy, and low product yield, making it difficult to meet the needs of research and development verification and mass production. Therefore, there is an urgent need for a needle injection system assembly device that can improve assembly efficiency and ensure assembly accuracy. Summary of the Invention

[0003] To address the problem of low automation rate in the assembly of commonly used needle injection systems, the purpose of this utility model is to provide a needle injection system assembly device that improves assembly efficiency and accuracy.

[0004] To achieve the above-mentioned utility model objectives, one embodiment of this utility model provides a needle injection system assembly device, comprising: The carrier mechanism includes a plurality of carrier units arranged laterally, each carrier unit being configured to support a component of the needle injection system, the component including a plurality of internal components and external components; 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 and the material transfer module to move laterally, and the longitudinal movement module drives the material transfer module to move longitudinally, so as to sequentially connect at least some of the internal parts to form an internal assembly by longitudinal pressing, and fix the internal assembly inside the external parts.

[0005] As a further improvement of this utility model, each of the carrier units is provided with a positioning groove that matches the shape of each part, for supporting and positioning the corresponding part; The internal components include a pre-charge needle, one of the carrier units being a pre-charge needle carrier, the pre-charge needle including an upper first protrusion and a lower needle tip, and a positioning groove of the pre-charge needle carrier supporting the first protrusion to suspend the needle tip.

[0006] As a further improvement of this utility model, the needle injection system assembly device further includes a lateral clamping mechanism, which includes multiple clamping units configured to position at least some parts of the needle injection system.

[0007] As a further improvement of this utility model, one of the plurality of clamping units is a first clamping part, which is used to clamp the pre-charge needle to keep the pre-charge needle fixed when the positioning groove of the pre-charge needle carrier is away from the first protrusion.

[0008] As a further improvement of this utility model, one of the plurality of clamping units is a second clamping part, the second clamping part includes a pair of positioning clamps, the pair of positioning clamps clamp together to form a positioning hole, the internal parts include a first part, the first part has an insertion hole for inserting the pre-charge needle, the positioning hole and the insertion hole are aligned longitudinally, the positioning hole is configured to guide the pre-charge needle to be inserted longitudinally into the insertion hole.

[0009] As a further improvement of this utility model, one of the plurality of clamping units is a third clamping part, the third clamping part includes a pair of tightening clamps, the internal part includes a second part, the second part includes multi-lobed sidewalls, and a gap is formed between adjacent sidewalls. The pair of tightening clamps clamp the multi-lobed sidewalls to reduce the gap between adjacent sidewalls, so as to facilitate the insertion of the first part.

[0010] As a further improvement of this utility model, the external part includes a limiting hole and a mounting hole, the limiting hole being located above the mounting hole, and the second part includes a snap-fit ​​part for engaging with the mounting hole; One of the plurality of clamping units is a fourth clamping part, which includes a pair of limiting clamps. The pair of limiting clamps align with the limiting hole and block the limiting hole when clamped, so that the snap-fit ​​part avoids the limiting hole when the internal component is installed downward.

[0011] As a further improvement of this utility model, the material transfer module includes a clamping part, which is configured to connect at least a portion of the internal parts to form an internal assembly by longitudinal pressing.

[0012] As a further improvement of this utility model, the needle injection system assembly device includes a photoelectric detection mechanism, which includes multiple photoelectric sensors; The photoelectric sensors detect the presence status of each component.

[0013] As a further improvement of this utility model, the material transfer module includes an elastic pressing part, the elastic pressing part includes a frame, and a pressing head, a first abutting block, a buffer member and a second abutting block are arranged sequentially along the longitudinal direction on the frame. The pressing head is fixed to the first abutting block, the buffer member is elastically supported between the first abutting block and the second abutting block, and the second abutting block is adjustablely connected to the frame along the longitudinal direction. The pressing head is configured to push the internal part into the external part.

[0014] Compared with commonly used technologies, this utility model has the following advantages: the needle injection system assembly device significantly reduces manual intervention through the automated collaboration of the carrier mechanism and the transfer mechanism. The transfer mechanism precisely controls the movement of the transfer module through the lateral movement module and the longitudinal movement module, and sequentially connects at least some internal parts into internal components by using a longitudinal pressing method, and connects the internal components with the external parts, ensuring the accuracy of the assembly process and the consistency of the product, achieving precise and efficient assembly, and providing an innovative solution for needle injection system assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembly device for a needle injection system 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 device according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a needle injection system assembly device 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 5 This 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 device; 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-filled 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. Transfer module; 331. Clamping part; 3311. 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

[0016] 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 protection scope of the present invention.

[0017] 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.

[0018] One embodiment of this utility model provides a needle injection system assembly device, which enables efficient and precise assembly of needle injection system components and is particularly suitable for automated production environments.

[0019] 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.

[0020] 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.

[0021] The needle injection system assembly device 100 in this embodiment is as follows: Figure 1 and 2 As shown, it includes a carrier mechanism 10 and a transfer mechanism 30. Through the coordinated work of the carrier mechanism 10 and the transfer mechanism 30, the precise alignment and connection of each part during the assembly process are ensured.

[0022] The needle injection system 70 includes multiple internal and external components, with the internal components being fixed within the external components.

[0023] In this embodiment, as Figure 3 As shown, the internal components include a side insert 71, a pre-charged needle 72, a trigger 73, a retractor 74, and an intermediate layer 75, while the external components include a pen cap 76 and an outer sleeve 77.

[0024] The assembly process is as follows: First, the pre-charge needle 72 and the trigger element 73 are fixedly connected through the side plug 71, then they are snapped together with the needle receiving element 74, and then snapped together with the middle 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 device 100 of this embodiment can adapt to the assembly requirements 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 plurality of carrier units arranged laterally on the base, each carrier unit being configured to support a component of the needle injection system 70.

[0027] In this embodiment, each carrier unit is sequentially configured as a side insert carrier 11, a pre-charged needle carrier 12, a trigger carrier 13, a needle retractor carrier 14, an intermediate layer carrier 15, a pen cap carrier 16, and an outer sleeve carrier 17. Before assembly, each part is loaded onto the corresponding carrier.

[0028] 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.

[0029] In this embodiment, the horizontal direction is parallel to the left-right direction, and the vertical direction is parallel to the up-down direction.

[0030] Each unit independently supports a specific part, facilitating maintenance and adjustment. Each carrier unit has a positioning groove that matches the shape of the part, used to support and position the corresponding part. The carrier unit fixes the part by magnetic force or mechanical clamping.

[0031] like 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 and the material transfer module 33 to move laterally, and the longitudinal movement module 32 drives the material transfer module 33 to move longitudinally. This allows at least some of the internal parts to be connected sequentially to form an internal assembly by longitudinal pressing. The internal assembly is then connected to the outer sleeve 77, and the pen cap 76 is connected to the outer sleeve 77 to fix the internal assembly between the outer sleeve 77 and the pen cap 76.

[0032] The transfer mechanism 30 moves the parts from the needle injection system 70 to the assembly position and performs pressing assembly, achieving high-precision and high-efficiency automated assembly.

[0033] The lateral movement module 31 and the longitudinal movement module 32 adopt a servo motor driven linear guide rail system. The guide rails extend laterally and vertically, respectively. The lateral movement module 31 controls the longitudinal movement module 32 to move along the lateral guide rail. The longitudinal movement module 32 drives the transfer module 33 to move longitudinally. The transfer module 33 is a pneumatic or electric clamp. The control system realizes the gripping and release of parts. The longitudinal movement module 32 applies a downward pressing force to the transfer module 33.

[0034] like Figure 2 and 3 As shown, the needle injection system assembly device 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.

[0035] 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.

[0036] The assembly process of the needle injection system 70 is as follows: The corresponding parts are loaded onto the multiple carrier units of the carrier mechanism 10.

[0037] Drive the vertical movement module 50 to move the carrier mechanism 10 to the assembly station.

[0038] The transfer mechanism 30 actuates, driving the transfer module 33 to move to the target position to grasp internal parts (such as pre-charged pins 72, trigger elements 73, etc.), and moves them horizontally and vertically above other carrier units, pressing them together to form internal components. The pressing speed and force are precisely adjusted by the control system to ensure a firm connection.

[0039] The transfer module 33 moves the internal components above the outer sleeve 77 and inserts them into the outer sleeve 77 by pressing them vertically.

[0040] The transfer module 33 picks up the pen cap 76, moves it above the outer sleeve 77, and presses it to connect the pen cap 76 and the outer sleeve 77. After connection, the internal components are fixed between the outer sleeve 77 and the pen cap 76, completing the assembly.

[0041] Automated pressing ensures controllable force and depth for each assembly, improving product quality. Furthermore, the continuous automated assembly process significantly enhances production efficiency, meeting the needs of mass production.

[0042] like Figure 6 As shown, the pre-charge needle 72 in this embodiment includes a first protrusion on the top and a needle tip on the bottom. The positioning groove of the pre-charge needle carrier 12 supports the first protrusion so that the needle tip is suspended in the air.

[0043] The pre-charge needle carrier 12 includes a support base 121, a carrier 122, and a first reset part 123.

[0044] 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.

[0045] The carrier 122 is a movable component capable of reciprocating 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. The first protrusion is supported by the upper surface of the carrier 122.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Furthermore, the needle injection system assembly device 100 also includes a lateral clamping mechanism 20, which includes a plurality of clamping units configured to position at least some parts of the needle injection system 70.

[0050] The lateral clamping mechanism 20 secures at least some parts of the needle injection system 70 during assembly, ensuring stable positioning.

[0051] The clamping unit clamps various parts on horizontal planes in all directions (front, back, left, and right). The clamping unit is pneumatically or electrically controlled, and its opening and closing are achieved through a control system. The lateral clamping mechanism 20 works in conjunction with the control system to achieve automatic clamping and release, improving production efficiency.

[0052] like Figure 5 As shown, the lateral clamping mechanism 20 of this embodiment includes a first clamping part 21, a second clamping part 22, a third clamping part 23 and a fourth clamping part 24.

[0053] The first clamping part 21 is used to clamp the pre-charge needle 72. When the carrier mechanism 10 is in the assembly position, the first clamping part 21 clamps the side of the pre-charge needle 72 and keeps the pre-charge needle 72 fixed when the positioning groove of the pre-charge needle carrier 12 is away from the first protrusion.

[0054] 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.

[0055] 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.

[0056] The needle injection system assembly device 100 also includes a lateral pusher mechanism 40, which is configured to drive the side insert 71 of the needle injection system 70 to securely connect 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 simultaneously inserts the side insert 71 into the pre-charge needle 72 and the trigger 73 to complete the fixation. The lateral pusher mechanism 40 uses a cylinder or motor to provide the thrust.

[0057] When the transfer mechanism 30 moves downward, it aligns the trigger 73 with the pre-charge needle 72. During this downward movement, it simultaneously drives the carrier 122 to the second position. Because 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, leaving space below the first protrusion for the insertion of the side insert 71. Subsequently, the lateral pushing mechanism 40 pushes the side insert 71 laterally, as... Figure 6 and 7 As shown, the side plug 71 is inserted into the connection between the precharge pin 72 and the trigger 73 to complete the fixation.

[0058] The clamping design of the first clamping part 21 ensures that the pre-charge needle 72 remains fixed in its original position when the carrier 122 that originally supported the pre-charge needle 72 moves down, thus preventing the pre-charge needle 72 from falling and failing to expose the first protrusion; on the other hand, it prevents the needle tip from touching other structures and being contaminated.

[0059] like Figure 5 As shown, one of the multiple clamping units is a second clamping part 22. The second clamping part 22 includes a pair of positioning clamps. When the pair of positioning clamps are clamped, they enclose a positioning hole. The internal parts include a first part. The first part has an insertion hole for inserting a pre-charge needle 72. The positioning hole is longitudinally aligned with the insertion hole. The positioning hole is configured to guide the pre-charge needle 72 to be inserted longitudinally into the insertion hole.

[0060] The first component in this embodiment is a needle take-up member 74. The positioning hole is aligned with the needle take-up member 74 in the longitudinal direction. The positioning hole is configured to guide the pre-charged needle 72 to be inserted into the needle take-up member 74 in the longitudinal direction.

[0061] 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.

[0062] During assembly, the 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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 internal parts include a second part, which includes a multi-lobed sidewall.

[0067] The second component in this embodiment may be an intermediate layer 75, which includes multi-lobed sidewalls with gaps between adjacent sidewalls. A pair of clamping clips clamp the multi-lobed sidewalls to reduce the gaps between adjacent sidewalls, so as to facilitate the insertion of the receiving needle 74.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] Furthermore, the transfer module 33 includes a clamping part 331, which is configured to assemble the trigger 73 with the pre-charge needle 72, the retractor 74 and the intermediate layer 75 by longitudinal pressing, and to assemble the pen cap 76 with the outer sleeve 77.

[0076] like Figure 8 and 9 As shown, the material transfer module 33 includes a gripping part 331, which includes a pair of material transfer clamps 3311 to grip the trigger 73 and the pen cap 76. The gripping part 331 is a pair of pneumatic material transfer clamps 3311. The material transfer clamps 3311 are controlled to open and close by a cylinder. In this embodiment, the pair of material transfer clamps 3311 are arranged vertically to facilitate the insertion of parts from top to bottom.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] For shorter triggers 73, such as the trigger 73 corresponding to a 0.5ml needle 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, which stably presses down the trigger 73.

[0082] Furthermore, the needle injection system assembly device 100 includes a photoelectric detection mechanism 60, which includes multiple photoelectric sensors, each of which detects the presence status of a component.

[0083] like Figure 5 As shown, 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 pin 72, the third photoelectric unit 63 detects the trigger element 73, the fourth photoelectric unit 64 detects the pin 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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 device 100 to handle outer sleeves 77 of different specifications, enhancing the versatility of the device.

[0095] Compared with commonly used technologies, this embodiment has the following beneficial effects: The needle injection system assembly device 100 significantly reduces manual intervention through the automated cooperation of the carrier mechanism 10 and the transfer mechanism 30. The transfer mechanism 30 precisely controls the movement of the transfer module 33 through the lateral movement module 31 and the longitudinal movement module 32, and sequentially connects at least some internal parts into internal components by longitudinal pressing, and connects the internal components to the outer sleeve 77 and the pen cap 76, ensuring the accuracy of the assembly process and the consistency of the product, achieving precise and efficient assembly, and providing an innovative solution for the assembly of the needle injection system 70.

[0096] 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.

[0097] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A needle injection system assembly device, characterized in that, include: The carrier mechanism includes a plurality of carrier units arranged laterally, each carrier unit being configured to support a component of the needle injection system, the component including a plurality of internal components and external components; 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 and the material transfer module to move laterally, and the longitudinal movement module drives the material transfer module to move longitudinally, so as to sequentially connect at least some of the internal parts to form an internal assembly by longitudinal pressing, and fix the internal assembly inside the external parts.

2. The needle injection system assembly device according to claim 1, characterized in that, Each of the aforementioned carrier units is provided with a positioning groove that matches the shape of each part, for supporting and positioning the corresponding part; The internal components include a pre-charge needle, one of the carrier units being a pre-charge needle carrier, the pre-charge needle including an upper first protrusion and a lower needle tip, and a positioning groove of the pre-charge needle carrier supporting the first protrusion to suspend the needle tip.

3. The needle injection system assembly device according to claim 2, characterized in that, The needle injection system assembly device further includes a lateral clamping mechanism, which comprises multiple clamping units configured to position at least some parts of the needle injection system.

4. The needle injection system assembly device according to claim 3, characterized in that, One of the plurality of clamping units is a first clamping part, which is used to clamp the pre-charge needle to keep the pre-charge needle fixed when the positioning groove of the pre-charge needle carrier is away from the first protrusion.

5. The needle injection system assembly device according to claim 3, characterized in that, One of the plurality of clamping units is a second clamping part, the second clamping part including a pair of positioning clamps, which enclose a positioning hole when clamped. The internal part includes a first part having an insertion hole for inserting the pre-charge needle. The positioning hole is longitudinally aligned with the insertion hole, and the positioning hole is configured to guide the pre-charge needle to be inserted longitudinally into the insertion hole.

6. The needle injection system assembly device according to claim 5, characterized in that, One of the plurality of clamping units is a third clamping part, the third clamping part including a pair of tightening clamps, the internal part including a second part, the second part including multi-lobed sidewalls, with gaps formed between adjacent sidewalls, the pair of tightening clamps clamping the multi-lobed sidewalls to reduce the gaps between adjacent sidewalls to facilitate the insertion of the first part.

7. The needle injection system assembly device according to claim 6, characterized in that, The external component includes a limiting hole and a mounting hole, the limiting hole being located above the mounting hole; the second component includes a snap-fit ​​part for engaging with the mounting hole. One of the plurality of clamping units is a fourth clamping part, which includes a pair of limiting clamps. The pair of limiting clamps align with the limiting hole and block the limiting hole when clamped, so that the snap-fit ​​part avoids the limiting hole when the internal component is installed downward.

8. The needle injection system assembly device according to claim 1, characterized in that, The material transfer module includes a clamping part configured to connect at least a portion of the internal parts to form an internal assembly by longitudinal pressing.

9. The needle injection system assembly device according to claim 1, characterized in that, The needle injection system assembly device includes a photoelectric detection mechanism, which includes multiple photoelectric sensors. The photoelectric sensors detect the presence status of each component.

10. The needle injection system assembly device according to claim 1, characterized in that, The material transfer module includes an elastic pressing part, which includes a frame and a pressing head, a first abutting block, a buffer, and a second abutting block arranged sequentially along the longitudinal direction on the frame. The pressing head is fixed to the first abutting block, the buffer is elastically supported between the first abutting block and the second abutting block, and the second abutting block is adjustablely connected to the frame along the longitudinal direction. The pressing head is configured to push the internal part into the external part.

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