Air tightness test tool for injector assembly line

Abstract

The utility model discloses an air tightness test tool for an injector assembly line, which relates to the technical field of injector processing, and comprises a base, an air tightness test device, a pressure test device and an air tightness test device, the controller is arranged on the base, the tester is arranged on the base, and the tester is connected with the controller; the fixing device and the tester are distributed at an interval, and the fixing device comprises a pair of clamping assemblies capable of relatively moving to clamp and loosen the injector; the first sealing mechanism is arranged on the base in a sliding mode, and the first sealing mechanism is used for blocking the large end of an injector; and the second sealing mechanism is arranged in the insertion hole of the tester, and the second sealing mechanism is used for sealing the outer side of the small end of the injector. The device is good in stability, convenient to operate and capable of effectively improving the production efficiency and the product quality of an injector assembly line.

Description

Technical Field

[0001] The utility model relates to the technical field of syringe processing, and particularly relates to an airtightness testing tooling for a syringe assembly line. Background Art

[0002] In the medical industry, as a common medical device, the quality of a syringe is directly related to the life, health and safety of patients. During the production and assembly process of a syringe, airtightness testing is a crucial step. Only through strict airtightness detection can it be ensured that there will be no leakage problems during the use of the syringe, thus guaranteeing the accuracy and safety of medical operations.

[0003] Currently, in the prior art, when performing airtightness testing on a syringe, the commonly used method is to seal one end of the syringe through a specific sealing structure, and the other end is connected to a professional testing instrument to detect the airtightness condition of the syringe. However, due to the large variety of syringe specifications on the market, there are significant differences in the length and tube diameter of syringes of different specifications. This diversity of specifications makes it difficult for the existing sealing structures and testing instruments to perfectly adapt to syringes of various specifications.

[0004] When encountering the situation of non-matching specifications, problems such as inaccurate test results due to poor sealing or inability to perform the test because it cannot be normally connected to the testing instrument may occur, greatly limiting the scope of use of the existing testing structures. This not only increases the testing cost and time of production enterprises, but also may lead to unqualified products flowing into the market due to inaccurate testing, posing potential risks to medical safety. Therefore, there is an urgent need to improve the existing testing structures to meet the airtightness testing requirements of syringes of different specifications, improve the accuracy and efficiency of testing, and guarantee the product quality of syringes. Content of the Utility Model

[0005] In view of this, the utility model provides an airtightness testing tooling for a syringe assembly line to solve the technical problem that it is difficult for a syringe to adapt to a sealing structure and a tester due to the variety of syringe specifications (length and tube diameter), resulting in limited use.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] An airtightness testing tooling for a syringe assembly line, comprising:

[0008] A base, on which a controller is arranged;

[0009] A tester, which is arranged on the base and is connected to the controller;

[0010] A fixing device, which is spaced apart from the tester, and the fixing device includes a pair of clamping components capable of relatively moving to clamp and release a syringe;

[0011] A first sealing mechanism, which is slidably arranged on the base, and the first sealing mechanism is used to block the large end of the syringe;

[0012] A second sealing mechanism, which is arranged in the insertion hole of the tester, and the second sealing mechanism is used to seal the outside of the small end of the syringe.

[0013] Furthermore, the fixing device further includes:

[0014] An installation box, which is installed on the base;

[0015] A motor, which is installed on the installation box;

[0016] A gear, which is connected to the output end of the motor;

[0017] A lower rack and an upper rack, which are oppositely arranged, and the upper rack and the lower rack are respectively meshed and connected to the upper and lower sides of the gear, and the upper rack and the lower rack are both connected to the corresponding clamping component.

[0018] Furthermore, the fixing device further includes a pair of guiding components, and the guiding components include a sliding rod and a slider in sliding fit, the sliding rod is fixed on the side wall of the installation box, a connecting rod is arranged on the slider, and the connecting rod is connected to the corresponding clamping component.

[0019] Furthermore, the clamping component includes:

[0020] A pair of connecting seats, which are connected to the corresponding connecting rods;

[0021] A pair of clamping plates, which are connected to the corresponding connecting seats;

[0022] A pair of protective pads, which are installed on the corresponding clamping plates.

[0023] A pair of sliding holes are provided at the upper end of the installation box, and the connecting seat is in sliding fit with the corresponding sliding hole.

[0024] Furthermore, at least one pressure sensor is arranged on the protective pad, and the pressure sensor is electrically connected to the controller.

[0025] Furthermore, two supporting seats are arranged at the upper end of the installation box, and the supporting seats are used to support the syringe.

[0026] Furthermore, the first sealing mechanism includes:

[0027] A mounting frame, at the bottom of the mounting frame is provided with a moving seat, and the moving seat is slidably arranged on the sliding groove of the base;

[0028] A locking screw, which is in threaded cooperation with the moving seat. The locking screw can pass through the moving seat and abut against the side wall of the sliding groove to realize the locking of the mounting frame;

[0029] A mounting seat, which is mounted on the mounting frame;

[0030] A sealing gasket, which is inserted and fixed in the limiting groove of the mounting seat, and the sealing gasket is used to seal the large end.

[0031] Furthermore, the second sealing mechanism includes:

[0032] A sealing ring, which is arranged in the blind hole at the outer end of the insertion hole;

[0033] A sealing collar, which is mounted in the blind hole and sleeved on the small end;

[0034] A stopper, which is sleeved on the outside of the sealing collar and is located in the blind hole.

[0035] Furthermore, the sealing collar includes a sealing main body, and the inner wall of the sealing main body has a first sealing lip and a second sealing lip which are distributed at intervals. The first sealing lip and the second sealing lip can abut against the outer wall of the small end to realize the sealing of the outer periphery of the small end.

[0036] Furthermore, the stopper includes:

[0037] A ring sleeve body, which is sleeved on the outer periphery of the sealing collar;

[0038] An outer retaining arm and an inner retaining arm, which are integrally connected to the ring sleeve body. The outer retaining arm abuts against the blind hole, the inner retaining arm abuts against the shoulder on the outside of the sealing main body, and there is a concave cavity between the outer retaining arm and the inner retaining arm, and a filler is arranged in the concave cavity.

[0039] As can be seen from the above technical solutions, the advantages of the present utility model are:

[0040] 1. In the present utility model, there is a movable first sealing mechanism, so that the present utility model can be applied to syringes of different lengths, and the first sealing mechanism can fully seal the large end of the syringe, making the detection result accurate.

[0041] 2. The present utility model is provided with a second sealing mechanism, which is installed at the insertion hole of the tester. It is convenient to replace and can tightly abut against the outer wall of the small end, so that the tester and the outer periphery of the small end are fully sealed, further ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0043] Figure 1 It is a schematic structural diagram of the present utility model.

[0044] Figure 2 It is a side cross-sectional view of the fixing device of the present utility model.

[0045] Figure 3 is Figure 2 a partial enlarged view of part A of

[0046] Figure 4 It is a schematic structural diagram of the first sealing mechanism of the present utility model.

[0047] Figure 5 It is a partial enlarged view of the connection relationship between the second sealing mechanism and the small end of the present utility model.

[0048] Figure 6 is Figure 5 a partial enlarged view of part C of

[0049] Description of the reference numerals: 1 - base; 11 - chute; 2 - controller; 3 - tester; 31 - insertion hole; 32 - blind hole; 4 - fixing device; 41 - installation box; 411 - support seat; 412 - sliding hole; 42 - motor; 43 - gear; 44 - lower rack; 45 - upper rack; 46 - guiding assembly; 461 - sliding rod; 462 - slider; 463 - connecting rod; 47 - connecting seat; 48 - clamping plate; 481 - protective pad; 49 - pressure sensor; 5 - first sealing mechanism; 51 - mounting bracket; 52 - locking screw; 53 - moving seat; 54 - mounting seat; 541 - limiting groove; 542 - positioning groove; 543 - mounting hole; 55 - sealing gasket; 551 - flange; 6 - second sealing mechanism; 61 - sealing ring; 62 - sealing ring; 621 - sealing main body; 622 - first sealing lip; 623 - second sealing lip; 624 - shoulder; 63 - blocking member; 631 - ring sleeve body; 632 - outer blocking arm; 633 - concave cavity; 634 - inner blocking arm; 64 - filling material; 100 - syringe; 101 - large end; 102 - small end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] To make the objectives, technical solutions, and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present utility model and their descriptions are used to explain the present utility model, but not to limit the present utility model.

[0051] In the field of medical device production, the airtightness of the syringe 100 is a key indicator to ensure its safety and effectiveness. The R & D team first went deep into the production site of the syringe assembly line, communicated with production personnel, quality inspection personnel, etc., and understood the problems existing in the current syringe airtightness test process. For example, it was found that the existing test tooling was difficult to adapt to the test requirements of syringes of different specifications, resulting in low production efficiency; the adaptability of the sealing structure to the syringe and the tester was poor, and gas leakage was likely to occur, affecting the test accuracy and other problems. Based on these actual needs, the R & D goal was defined as designing an airtightness test tooling that could adapt to syringes of different specifications, had high test accuracy, good stability, and was easy to operate.

[0052] Refer to Figures 1 to 6 , as Figure 1 shown, this embodiment provides an airtightness test tooling for a syringe assembly line. The airtightness test tooling for the syringe assembly line in this embodiment is specifically designed for airtightness testing of the syringe 100 on the syringe assembly line. The tooling is composed of main components such as a base 1, a tester 3, a fixing device 4, a first sealing mechanism 5, and a second sealing mechanism 6. Each component cooperates with each other to jointly complete the airtightness test task of syringes of different specifications.

[0053] As Figure 1 , Figure 4 shown, the base 1 serves as the support foundation of the entire tooling and is made of high-strength cast iron material, having good stability and load-bearing capacity. The upper surface of the base 1 is provided with an installation area for the controller 2, and the controller 2 is firmly fixed by screws. At the same time, two parallel sliding grooves 11 are also provided on the base 1 for the sliding installation of the first sealing mechanism 5 to ensure the smooth movement of the first sealing mechanism 5. The base 1 provides a stable installation platform for other components and, through connection with the controller 2, realizes the centralized control of the entire test process.

[0054] As Figure 1 , Figure 5As shown, the tester 3 is installed at a specific position on the base 1 and is connected to the controller 2 through a data cable to achieve data transmission and interaction of control instructions. The tester 3 is a high-precision airtightness testing device in the prior art. During testing, the tester 3 starts the internal air extraction pump or air supply pump, and changes the air pressure inside the syringe 100 by means of air extraction or air supply. At the same time, the high-precision pressure sensor inside the tester 3 monitors the air pressure change in real time and transmits the data to the controller 2 so that the controller 2 can judge the airtightness of the syringe 100.

[0055] As Figure 1 , Figure 2 and Figure 3 As shown, the installation box 41 is made of aluminum alloy material, with the characteristics of light weight and high strength. The installation box 41 is installed on the base 1 by screws, and two support seats 411 are arranged at its upper end. The surface of the support seat 411 is polished and smooth, which can effectively reduce the friction with the syringe 100 and ensure the levelness of the syringe 100 during the test. A pair of sliding holes 412 are also provided at the upper end of the installation box 41. The inner wall of the sliding hole 412 is finely processed and slidably matched with the connecting seat 47 of the clamping assembly to ensure the smooth movement of the clamping assembly. The motor 42 is a high-precision servo motor and is installed on the side of the installation box 41 and fixed by a motor bracket. The servo motor has the characteristics of stable rotation speed and high control precision, and can provide precise power for the movement of the clamping assembly. The gear 43 is connected to the output end of the motor 42 by a key. The module and number of teeth of the gear 43 are carefully designed to ensure good meshing with the lower rack 44 and the upper rack 45 to achieve stable transmission.

[0056] The lower rack 44 and the upper rack 45 are arranged oppositely and are respectively meshed and connected to the upper and lower sides of the gear 43. The upper rack 45 and the lower rack 44 are both made of high-strength alloy steel material, and the surface is quenched to improve the hardness and wear resistance of the rack. The upper rack 45 and the lower rack 44 are both connected to the corresponding clamping assembly. When the gear 43 rotates, it drives the upper rack 45 and the lower rack 44 to move relatively, thereby realizing the relative movement of the clamping assembly.

[0057] The fixing device 4 further includes a pair of guiding components 46. Each guiding component 46 includes a sliding rod 461 and a slider 462 that are slidably matched. The sliding rod 461 is made of stainless steel material, and the surface is polished, having good wear resistance and corrosion resistance. The sliding rod 461 is fixed on the side wall of the installation box 41 and fastened by screws. A connecting rod 463 is provided on the slider 462. The connecting rod 463 is connected to the corresponding clamping assembly. The lower rack 44 and the upper rack 45 are both connected to the corresponding slider 462. The guiding component 46 plays a guiding role to ensure the stability of the movement of the clamping assembly and prevent the clamping assembly from shifting during the movement.

[0058] The clamping assembly includes a pair of connecting seats 47, a pair of clamping plates 48 and a pair of protective pads 481. The connecting seat 47 is made of aluminum alloy material and is connected to the corresponding connecting rod 463 by threads, which is convenient for disassembly and replacement. The clamping plate 48 is connected to the corresponding connecting seat 47 by screws. The shape of the clamping plate 48 is designed according to the shape of the syringe 100 and can fit the surface of the syringe 100 tightly. The protective pad 481 is made of rubber material, has good elasticity and wear resistance, and is installed on the corresponding clamping plate 48. At least one pressure sensor 49 is arranged on the protective pad 481. The pressure sensor 49 adopts a high-precision piezoresistive sensor and is electrically connected to the controller 2. It can monitor the clamping pressure of the clamping assembly on the syringe 100 in real time and transmit the signal to the controller 2 so that the controller 2 can adjust the clamping force as needed to avoid excessive clamping pressure to damage the syringe 100 or too little clamping pressure to loosen the syringe 100.

[0059] like Figure 1 and Figure 4 As shown, the mounting frame 51 is made of aluminum alloy profiles, and has the characteristics of simple structure, light weight and high strength. A moving seat 53 is arranged at the bottom of the mounting frame 51, and the moving seat 53 matches the slide groove 11 of the base 1, so that the moving seat 53 can be slidably arranged on the slide groove 11 of the base 1, so that the mounting frame 51 can slide on the base 1.

[0060] The locking screw 52 is threadedly matched with the moving seat 53, and the head of the locking screw 52 is provided with anti-slip grooves, which is convenient for the operator to tighten and loosen. The locking screw 52 can pass through the moving seat 53 and abut against the side wall of the slide slot 11, thereby locking the mounting frame 51 by increasing the friction force. When the position of the mounting frame 51 needs to be adjusted, the locking screw 52 is loosened; after adjustment, the locking screw 52 is tightened to fix the mounting frame 51 at the desired position.

[0061] The mounting seat 54 is made of plastic material, which is light and low in cost. The mounting seat 54 is mounted on the mounting frame 51, and the mounting seat 54 is fixed on the mounting frame 51 by screws passing through the mounting holes 543. A limiting groove 541 is provided on the mounting seat 54, and the shape of the limiting groove 541 matches the shape of the sealing gasket 55. The outer end of the limiting groove 541 has a protruding positioning groove 542, and the width of the positioning groove 542 is slightly larger than the width of the flange 551 of the sealing gasket 55, which can not only realize the rapid installation of the sealing gasket 55, but also ensure that the sealing gasket 55 will not easily fall off the limiting groove 541.

[0062] The gasket 55 is made of silicone material and has good elasticity and sealing performance. The gasket 55 is inserted and fixed in the limiting groove 541 of the mounting seat 54. The outer end of the gasket 55 has a flange 551, and the flange 551 cooperates with the positioning groove 542. The gasket 55 is used to seal the large end 101 of the syringe 100. Its surface has been specially treated, with good wear resistance and corrosion resistance, and can ensure the sealing effect during long-term use.

[0063] As Figure 1 , Figure 5 and Figure 6 shown, the sealing ring 61 is made of rubber material and is arranged in the blind hole 32 at the outer end of the insertion hole 31 of the tester 3. The cross-section of the sealing ring 61 is circular, and its diameter is slightly larger than the diameter of the blind hole 32, which can play a role in preliminary sealing to a certain extent and prevent gas from leaking from the connection between the insertion hole 31 and the small end 102.

[0064] The sealing ring 62 is installed in the blind hole 32 and sleeved on the small end 102 of the syringe 100. The sealing ring 62 includes a sealing main body 621, and the sealing main body 621 is made of polytetrafluoroethylene material, with good corrosion resistance and self-lubrication performance. The inner wall of the sealing main body 621 has a first sealing lip 622 and a second sealing lip 623 distributed at intervals. The first sealing lip 622 and the second sealing lip 623 are made of rubber material, with good elasticity and sealing performance. The first sealing lip 622 and the second sealing lip 623 can abut against the outer wall of the small end 102 to achieve the sealing of the outer periphery of the small end 102. A shoulder 624 is also provided on the outside of the sealing main body 621, and the shoulder 624 can cooperate with the stopper 63 to ensure the stability of the sealing ring 62.

[0065] The stopper 63 is sleeved on the outside of the sealing ring 62 and is located in the blind hole 32. The stopper 63 includes a ring sleeve body 631, an outer retaining arm 632, and an inner retaining arm 634. The ring sleeve body 631 is made of plastic material and is sleeved on the outer periphery of the sealing ring 62, leaving a certain gap between the ring sleeve body 631 and the sealing ring 62 to facilitate the installation and disassembly of the sealing ring 62. The outer retaining arm 632 and the inner retaining arm 634 are integrally connected to the ring sleeve body 631. The outer retaining arm 632 abuts against the blind hole 32, and the inner retaining arm 634 abuts against the shoulder 624 on the outside of the sealing main body 621. There is a cavity 633 between the outer retaining arm 632 and the inner retaining arm 634, and a filler 64 (such as an elastic object like sponge or silicone) is arranged in the cavity 633. By filling the cavity 633 with the filler 64, the abutting effect of the outer retaining arm 632 against the outer wall of the blind hole 32 and the abutting effect of the inner retaining arm 634 against the sealing ring 62 can be strengthened, thereby prompting the first sealing lip 622 and the second sealing lip 623 to tightly abut against the outer wall of the small end 102, ensuring full sealing and no leakage between the small end 102 and the tester 3.

[0066] Working process:

[0067] 1. Syringe placement: Place the syringe 100 horizontally on the two support seats 411 in the direction that the large end 101 is on the right and the small end 102 is on the left. The two support seats 411 can ensure the levelness of the syringe 100 and keep the syringe 100 stable during the test.

[0068] 2. Sealing and connection of the small end: First, insert the small end 102 into the insertion hole 31 to connect the syringe 100 with the tester 3. At this time, the sealing ring 61 of the second sealing mechanism 6 plays a preliminary sealing role to prevent gas from leaking from the connection between the insertion hole 31 and the small end 102. At the same time, the first sealing lip 622 and the second sealing lip 623 of the sealing ring 62 tightly abut against the outer wall of the small end 102 under the action of the stopper 63, further ensuring the sealing between the small end 102 and the tester 3.

[0069] 3. Syringe clamping: Drive the gear 43 to rotate through the motor 42 of the fixing device 4, drive the upper rack 45 and the lower rack 44 to move relative to each other, and then make the clamping assembly move relative to each other. During the movement, the guiding assembly 46 ensures the stability of the movement of the clamping assembly and prevents the clamping assembly from shifting. When the clamping assembly contacts the syringe 100, the protective pad 481 plays a buffering role. At the same time, the pressure sensor 49 monitors the clamping pressure of the clamping assembly on the syringe 100 in real time and transmits the signal to the controller 2. The controller 2 controls the rotation of the motor 42 according to the preset clamping pressure value. When the clamping pressure reaches the set value, the motor 42 stops rotating and clamps the syringe 100.

[0070] 4. Sealing of the large end: Loosen the locking screw 52, move the mounting bracket 51, and make the sealing pad 55 gradually approach the large end 101 of the syringe 100. When the sealing pad 55 abuts against the large end 101, tighten the locking screw 52 to fix the mounting bracket 51. At this time, the sealing pad 55 fits tightly against the large end 101 to achieve the sealing of the large end 101 and prevent gas from leaking from the large end 101.

[0071] 5. Air tightness test: During the test, the tester 3 starts the internal air extraction pump or air supply pump and changes the air pressure inside the syringe 100 by means of air extraction or air supply. At the same time, the high-precision pressure sensor inside the tester 3 monitors the air pressure change in real time and transmits the data to the controller 2. The controller 2 analyzes and processes the air pressure change data according to the preset air tightness judgment standard. If the air pressure change is within the allowable range, it is determined that the air tightness of the syringe 100 is good; if the air pressure change exceeds the allowable range, it is determined that the air tightness of the syringe 100 is unqualified, and an alarm signal is issued to prompt the operator to take corresponding measures.

[0072] The airtightness test tooling for the syringe assembly line in this embodiment can meet the airtightness test requirements of syringes 100 with different specifications through the reasonable design and coordinated work of various components, and solves the technical problem that it is difficult for the syringe 100 in the prior art to be adapted to the sealing structure and the tester 3, resulting in limited use. At the same time, this tooling has the advantages of high test accuracy, good stability, and convenient operation, and can effectively improve the production efficiency and product quality of the syringe assembly line.

[0073] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An airtightness test tool for a syringe assembly line, characterized in that Including: A base (1) with a controller (2) disposed thereon; A tester (3) disposed on the base (1), and the tester (3) is connected to the controller (2); A fixing device (4) spaced from the tester (3), and the fixing device (4) includes a pair of clamping components capable of relative movement to clamp and release a syringe (100); A first sealing mechanism (5) slidably disposed on the base (1), and the first sealing mechanism (5) is used to block the large end (101) of the syringe (100), and the first sealing mechanism (5) can move to adapt to syringes (100) of different lengths; A second sealing mechanism (6) disposed in the insertion hole (31) of the tester (3), and the second sealing mechanism (6) is used to seal the outer side of the small end (102) of the syringe (100); Two support seats (411) are provided at the upper end of the mounting box (41), and the support seats (411) are used to support the syringe (100); The second sealing mechanism (6) includes: a sealing ring (61) disposed in a blind hole (32) at the outer end of the insertion hole (31); A sealing ring (62) installed in the blind hole (32) and sleeved on the small end (102); a stopper (63) sleeved on the outer side of the sealing ring (62) and located in the blind hole (32); The sealing ring (62) includes a sealing body (621), and the inner wall of the sealing body (621) has a first sealing lip (622) and a second sealing lip (623) distributed at intervals. The first sealing lip (622) and the second sealing lip (623) can abut against the outer wall of the small end (102) to achieve sealing of the outer periphery of the small end (102), and the first sealing lip (622) and the second sealing lip (623) can adapt to syringes (100) of different diameters.

2. The airtightness test tooling for the syringe assembly line according to claim 1, characterized in that, The fixing device (4) further includes: A mounting box (41) installed on the base (1); A motor (42) installed on the mounting box (41); A gear (43) connected to the output end of the motor (42); A lower rack (44) and an upper rack (45) oppositely arranged, and the upper rack (45) and the lower rack (44) are respectively meshed and connected to the upper and lower sides of the gear (43), and the upper rack (45) and the lower rack (44) are both connected to the corresponding clamping components; The fixing device (4) further includes a pair of guiding components (46). The guiding components (46) include a sliding rod (461) and a slider (462) in sliding fit. The sliding rod (461) is fixed on the side wall of the mounting box (41). A connecting rod (463) is provided on the slider (462), and the connecting rod (463) is connected to the corresponding clamping component.

3. The airtightness testing tooling for a syringe assembly line according to claim 2, characterized in that, The clamping component includes: A pair of connecting seats (47), and the connecting seats (47) are connected to the corresponding connecting rods (463); A pair of clamping plates (48), and the clamping plates (48) are connected to the corresponding connecting seats (47); A pair of protective pads (481), and the protective pads (481) are installed on the corresponding clamping plates (48); A pair of sliding holes (412) are provided at the upper end of the mounting box (41), and the connecting seats (47) are in sliding fit with the corresponding sliding holes (412).

4. The airtightness test tooling for the syringe assembly line according to claim 3, characterized in that, At least one pressure sensor (49) is provided on the protective pad (481), and the pressure sensor (49) is electrically connected to the controller (2).

5. The airtightness test tooling for the syringe assembly line according to claim 1, characterized in that, The first sealing mechanism (5) includes: A mounting frame (51). A moving seat (53) is provided at the bottom of the mounting frame (51), and the moving seat (53) is slidably arranged on the chute (11) of the base (1); A locking screw (52) is in threaded fit with the moving seat (53). The locking screw (52) can pass through the moving seat (53) and then abut against the side wall of the chute (11) to lock the mounting frame (51); A mounting seat (54), and the mounting seat (54) is installed on the mounting frame (51); A sealing gasket (55) is inserted and fixed in the limiting groove (541) of the mounting seat (54), and the sealing gasket (55) is used to seal the large end (101).

6. The airtightness test tooling for the syringe assembly line according to claim 1, characterized in that, The stopper (63) includes: A ring sleeve body (631), and the ring sleeve body (631) is sleeved on the outer periphery of the sealing ring (62); An outer stopper arm (632) and an inner stopper arm (634). The outer stopper arm (632) and the inner stopper arm (634) are integrally connected to the ring sleeve body (631). The outer stopper arm (632) abuts against the blind hole (32), and the inner stopper arm (634) abuts against the shoulder (624) on the outside of the sealing main body (621). There is a cavity (633) between the outer stopper arm (632) and the inner stopper arm (634), and a filler (64) is arranged in the cavity (633).

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