A kind of needle cap strength testing device and testing method of prefilled syringe

Abstract

The invention discloses a needle cap strength detection device for a prefilled syringe and a detection method thereof, belonging to the technical field of strength detection. The invention proposes the following scheme, which comprises a detection mechanism, wherein a test mechanism is mounted on the detection mechanism, wherein the detection mechanism comprises a bottom plate, wherein an annular plate and a feeding assembly are arranged at the upper middle part of the bottom plate; the invention drives a first gear and a second gear to transmit by a motor, so that a rotating shaft drives a turntable to rotate, and the turntable drives the needle cap to rotate through a steering wheel, and a roller moves on the annular plate, so that after the roller enters an uphill portion, a bracket drives a dovetail slide rail to move upward, so that a tooth segment and a third gear are transmitted, so that the steering plate flips an inclined angle, so that the needle cap rotates, and as the slope of the uphill portion increases, the steering angle of the needle cap is different, so that the needle cap can automatically adjust the angle, and the needle cap can be impact-strength tested at different angles, thereby improving the yield rate.

Description

Technical Field

[0001] The present invention relates to the technical field of strength detection, and in particular to a needle cap strength detection device for a prefilled syringe and a detection method thereof. Background Art

[0002] Prefilled syringes are widely used in the packaging of high-end drugs such as vaccines, antithrombotic drugs, bioengineering drugs, and cosmetic drugs. Prefilled syringes are pre-filled with a certain amount of liquid medicine, which is safe and hygienic. External bacteria can only contaminate the liquid medicine through the needle, so the design of the needle cap is particularly critical.

[0003] At present, in order to ensure the strength of needle caps after production, it is often necessary to perform strength tests on needle caps. However, the needle cap strength testing equipment for prefilled syringes commonly used in the prior art can often only apply pressure to the needle caps at a single angle, and cannot simulate the impact on the needle caps at multiple angles and the impact on the airtight strength of the needle caps. Moreover, only a single needle cap can be tested at a time. When performing batch testing on needle caps, it takes a long time, and it is difficult to achieve continuous and efficient testing.

[0004] In view of the above problems, the present invention document proposes a needle cap strength detection device and a detection method for a prefilled syringe. Summary of the invention

[0005] The purpose of the present invention is to solve the problems that the common prefilled syringe needle cap strength testing equipment in the prior art can often only apply pressure to the needle cap at a single angle, cannot simulate the impact on the needle cap at multiple angles and the impact on the airtight strength of the needle cap, and can only test a single needle cap at a time. When batch testing of needle caps is performed, it takes a long time and it is difficult to achieve continuous and efficient testing. A prefilled syringe needle cap strength testing equipment and a testing method are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A needle cap strength detection device for a prefilled syringe comprises a detection mechanism, on which a testing mechanism is mounted;

[0008] The detection mechanism includes a bottom plate, an annular plate and a feeding assembly are arranged in the middle of the top of the bottom plate, the annular plate is located below the feeding assembly, a plurality of transmission assemblies are slidably connected on the annular plate, the transmission assemblies are transmitted to the steering assembly, and the steering assembly is arranged on the feeding assembly;

[0009] The testing mechanism comprises a lifting assembly, on which a plurality of arc-shaped limiting assemblies are arranged, the limiting assemblies limit the position of a detachable testing block, and the detachable testing block is connected to one end of the lifting assembly;

[0010] The feeding assembly drives the steering assembly to drive the needle cap to rotate, and at the same time the transmission assembly cooperates with the annular assembly to move, so that the transmission assembly and the steering assembly transmit the steering of the needle cap at different positions, and the lifting assembly releases the detachable test block through the limit assembly to perform a strength test on the needle cap.

[0011] Preferably, an airtightness detection device is fixedly installed above the bottom plate;

[0012] A fixing rod is fixedly connected to the bottom of the annular plate, and the fixing rod is fixedly connected to the bottom plate. The annular plate includes an arc-shaped portion, and an upslope portion and a downslope portion are respectively provided at both ends of the arc-shaped portion. The upslope portion is connected to the downslope portion, and the slope of the portion extending from the upslope portion to the downslope portion increases.

[0013] Preferably, the lifting assembly includes a fixed frame, which is fixedly connected to the base plate, and a multi-stage electric push rod is fixedly installed on the fixed frame. The top of the multi-stage electric push rod is fixedly connected to a connecting plate, and ropes are fixedly connected below multiple ends of the connecting plate. The ropes pass through the fixed frame and are fixedly connected to the detachable test block.

[0014] Preferably, a telescopic rod is fixedly connected to the top of the detachable test block, and the telescopic rod is fixedly mounted on a fixing frame.

[0015] Preferably, the limiting assembly includes a top plate, two sliding rods and two springs are fixedly connected to the bottom of the top plate, the sliding rods are slidably connected in the sliding sleeves, the sliding sleeves are fixedly connected to the fixed frame, the top of the sliding sleeves is fixedly connected to the springs, and the bottom ends of the two sliding rods are fixedly connected to the same connecting shaft.

[0016] Preferably, the connecting shaft is slidably connected in the oblique opening, the oblique opening is opened on the limit plate, the limit plate is slidably connected in the hole sleeve, the hole sleeve is fixedly connected to the upper wall of the fixed frame, one end of the limit plate is an inclined surface, the limit plate is engaged with the inclined surface block, and the inclined surface block is fixedly connected above the detachable test block.

[0017] Preferably, the loading assembly includes a motor, which is fixedly mounted on the base plate, and the output shaft of the motor is fixedly connected to a first gear, the first gear is meshed with a second gear, the second gear is fixedly connected to a rotating shaft, the rotating shaft is rotatably mounted on the base plate through a bearing, and the top end of the rotating shaft is fixedly connected to a turntable.

[0018] Preferably, the transmission assembly includes a bracket, the upper wall and the lower wall of the bracket are fixedly connected with rollers, the two rollers slide on the upper and lower sides of the annular plate respectively, a dovetail slide rail is fixedly connected to the top of the bracket, a tooth segment is fixedly connected to the dovetail slide rail, the dovetail slide rail is slidably connected to the dovetail guide rail, and the dovetail guide rail is fixedly connected to the turntable.

[0019] Preferably, the steering assembly includes a steering plate, which is rotatably connected to the turntable via a pin shaft, a third gear is fixedly connected to the middle portion of the pin shaft, the third gear is meshed with the tooth segment, a needle head is installed on the steering plate, and a needle cap is engaged on the needle head.

[0020] A method for detecting a needle cap strength detection device for a prefilled syringe comprises the following steps:

[0021] S1. When testing the needle cap, the needle cap is engaged with the needle head and positioned, and then the motor drives the first gear to rotate, the first gear and the second gear are transmitted, the second gear drives the shaft to rotate, the shaft drives the turntable to rotate, and after the turntable rotates, the needle cap follows the movement, and the roller moves along the annular plate at the same time. When the roller moves to the uphill part of the annular plate, the inclined surface of the uphill part pushes the roller to drive the bracket to move upward, so that the bracket drives the dovetail slide rail to move upward, the tooth segment and the third gear are transmitted, the third gear drives the pin shaft and the steering plate to rotate, and the steering plate drives the needle cap to rotate. Since the slope of the uphill part gradually increases, the rotation direction of each needle cap is different;

[0022] S2. When the needle cap is at different angles, the multi-stage electric push rod retracts to drive the connecting plate to move downward. When the connecting plate contacts the top plate downward, the top plate drives the sliding rod to move downward, and the sliding rod drives the connecting shaft to move, so that the connecting shaft moves through the oblique mouth to squeeze the limit plate, and the limit plate is separated from the inclined block. At this time, the detachable test block moves downward by its own gravity acceleration, so that the detachable test block hits the needle cap downward, thereby meeting the strength test of the needle cap at different angles;

[0023] S3, then the roller moves downward through the downhill portion, so that the tooth segment and the third gear are transmitted, so that the steering plate is flipped and reset to keep it horizontal, and the needle cap is kept vertical. When the needle cap is located at the position of the airtight detection device, the airtight detection device performs a detection operation on the needle cap.

[0024] Compared with the prior art, the present invention provides a needle cap strength detection device and a detection method for a prefilled syringe, which have the following beneficial effects:

[0025] 1. The needle cap strength detection device and detection method of the prefilled syringe drive the first gear and the second gear to drive the rotating shaft to rotate the turntable through the motor, and the turntable drives the needle cap to rotate through the steering wheel, and the roller moves on the annular plate, so that after the roller enters the uphill part, the bracket drives the dovetail slide rail to move upward, so that the tooth segment and the third gear are transmitted, so that the steering plate flips the tilt angle, and the needle cap rotates, and as the slope of the uphill part increases, the steering angle of the needle cap is different, thereby meeting the operation of automatically adjusting the angle of the needle cap, meeting the impact strength test of the needle cap at different angles, and improving the yield rate.

[0026] 2. The needle cap strength testing device and testing method of the prefilled syringe retracts the multi-stage electric push rod to move the connecting plate downward, and the connecting plate presses the top plate downward. The sliding rod drives the connecting shaft to move, so that the connecting shaft is displaced by the oblique mouth squeezing the limit plate, so that the limit plate is separated from the inclined block. At this time, the detachable test block hits the needle cap through the acceleration of gravity, so that the strength of the needle caps at different angles can be tested simultaneously, thereby improving the detection efficiency.

[0027] 3. The needle cap strength testing device and testing method of the prefilled syringe drive the first gear and the second gear to transmit through the motor, so that the rotating shaft drives the needle cap to rotate through the turntable, so that the needle cap changes its position, and when the roller moves to the uphill part, the roller moves upward, and the tooth segment can be transmitted with the third gear, so that the angle of the needle cap can be changed, and the angle of the needle cap at different positions can be changed according to the slope of the uphill part, so that the needle cap can not only meet the purpose of continuous feeding, but also can continuously change the angle of the needle cap, meet the continuous detection operation of the needle cap, and then the needle cap strength test is performed, the roller enters the downhill part, and resets downward through the downhill part, at this time, the steering plate rotates and resets to keep it horizontal, so that the needle cap remains in an upright state, and then moves to the position of the airtight detection equipment, thereby meeting the continuous detection operation of the airtightness of the needle cap and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional view of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0029] Figure 2 A three-dimensional view of a ring plate of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0030] Figure 3 A bottom-up stereoscopic view of a feeding assembly of a needle cap strength testing device and a testing method for a prefilled syringe provided by the present invention;

[0031] Figure 4A three-dimensional view of a lifting assembly of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0032] Figure 5 A three-dimensional view of a limiter assembly of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0033] Figure 6 A three-dimensional view of the bottom plate of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0034] Figure 7 A view showing the connection between the annular plate and the transmission assembly of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0035] Figure 8 A three-dimensional view of a feeding assembly of a needle cap strength testing device and a testing method for a prefilled syringe proposed by the present invention;

[0036] Fig. 9 A view showing the connection between the transmission component and the steering component of a needle cap strength detection device and detection method for a prefilled syringe proposed by the present invention;

[0037] Fig.10 A three-dimensional view of a steering assembly of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention;

[0038] Fig.11 A three-dimensional view of a transmission component of a needle cap strength detection device and a detection method for a prefilled syringe proposed by the present invention.

[0039] In the figure: 100, test mechanism; 101, lifting assembly; 1011, fixed frame; 1012, multi-stage electric push rod; 1013, connecting plate; 1014, rope; 102, limit assembly; 1021, top plate; 1022, spring; 1023, sliding sleeve; 1024, sliding rod; 1025, limit plate; 1026, connecting shaft; 1027, oblique mouth; 1028, hole sleeve; 1029, inclined block; 103, detachable test block; 104, telescopic rod; 200, detection mechanism; 201, bottom plate; 202, feeding assembly; 2021, motor; 2 022, first gear; 2023, bearing; 2024, second gear; 2025, rotating shaft; 2026, turntable; 203, annular plate; 2031, fixing rod; 2032, arc-shaped portion; 2033, uphill portion; 2034, downhill portion; 204, airtightness detection equipment; 205, transmission assembly; 2051, bracket; 2052, roller; 2053, tooth segment; 2054, dovetail slide rail; 2055, dovetail guide rail; 206, steering assembly; 2061, steering plate; 2062, needle head; 2063, third gear; 2064, pin shaft. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] Example 1: Reference Figure 1-3 and Figure 6-11 , a needle cap strength testing device for a prefilled syringe, comprising a testing mechanism 200, on which a testing mechanism 100 is mounted;

[0043] The detection mechanism 200 includes a bottom plate 201, and an airtight detection device 204 is fixedly installed above the bottom plate 201. The airtight detection device 204 can be used to detect the needle cap. An annular plate 203 and a feeding assembly 202 are arranged in the middle of the upper part of the bottom plate 201. A fixing rod 2031 is fixedly connected to the lower part of the annular plate 203. The fixing rod 2031 is located at the inner ring edge below the annular plate 203, so that the fixing rod 2031 supports the annular plate 203 and prevents the fixing rod 2031 from blocking the roller 2052, so that the roller 2052 can roll smoothly on the annular plate 203. The fixing rod 2031 is fixedly connected to the bottom plate 201. The annular plate 203 includes an arc portion 2032, and the arc portion 2032 is a plane, so as to keep the roller 2052 rolling smoothly. The smooth movement of the wheel 2052 prevents the roller 2052 from moving up and down, so that the needle cap can smoothly correspond to the airtight detection device 204, which is convenient for the needle cap to be airtightly detected. The two ends of the arc portion 2032 are respectively provided with an upslope portion 2033 and a downslope portion 2034. When the roller 2052 moves to the downslope portion 2034, the roller 2052 moves downward along the downslope portion 2034, so that the roller 2052 is reset downward, and the upslope portion 2033 is connected to the downslope portion 2034. The slope of the part of the upslope portion 2033 extending to the downslope portion 2034 increases, and the slope of the upslope portion 2033 increases, so that the roller 2052 gradually moves upward, thereby increasing the upward movement distance of the roller 2052, so that the tooth segment 2053 and the third tooth segment 2053 are aligned. The transmission distance of the wheel 2063 is extended, so that different angles of the needle cap can be changed at different positions. The annular plate 203 is located below the feeding assembly 202, and a plurality of transmission assemblies 205 are slidably connected to the annular plate 203. The transmission assembly 205 includes a bracket 2051, and the upper wall and the lower wall of the bracket 2051 are fixedly connected with rollers 2052. The two rollers 2052 slide on the upper and lower sides of the annular plate 203 respectively. By arranging two rollers 2052 and placing the two rollers 2052 on the upper and lower sides of the annular plate 203, the rollers 2052 can move smoothly along the annular plate 203, and can achieve the purpose of vertical movement along the upslope 2033 and the downslope 2034, and the rollers 2052 can reduce resistance, thereby maintaining smooth movement. The bracket 2051 is fixedly connected with a dovetail rail 2054 on the top, and a tooth segment 2053 is fixedly connected to the dovetail rail 2054. The dovetail rail 2054 is slidably connected to the dovetail guide rail 2055. The dovetail guide rail 2055 can guide the dovetail rail 2054 to keep the dovetail rail 2054 sliding up and down smoothly, so that the tooth segment 2053 can move up and down smoothly, so that the tooth segment 2053 and the third gear 2063 can be smoothly transmitted. The dovetail guide rail 2055 is fixedly connected to the turntable 2026, and the transmission assembly 205 is transmitted with the steering assembly 206. The steering assembly 206 includes a steering plate 2061, and the steering plate 2061 is rotatably connected to the turntable 2026 through a pin shaft 2064. The pin shaft 2064 can provide a rotation point for the steering plate 2061.The steering plate 2061 and the third gear 2063 can smoothly rotate. The middle part of the pin 2064 is fixedly connected with the third gear 2063. The third gear 2063 is meshed with the tooth segment 2053. When the tooth segment 2053 moves, the tooth segment 2053 can realize transmission with the third gear 2063, so that the steering plate 2061 can be driven to drive the needle cap to rotate. A needle head 2062 is installed on the steering plate 2061. A needle cap is engaged with the needle head 2062. The needle head 2062 has the same size as the needle, so that the needle cap can be smoothly engaged with the needle head 2062, so that the needle cap can be positioned. The steering assembly 206 is arranged on the feeding assembly 202. The feeding assembly 202 includes a motor 2021. The motor 2021 The motor 2021 is fixedly mounted on the bottom plate 201. The output shaft of the motor 2021 is fixedly connected with the first gear 2022. The first gear 2022 is meshed with the second gear 2024. The first gear 2022 and the second gear 2024 are transmitted, so that the second gear 2024 can smoothly drive the rotating shaft 2025 to rotate, so that the rotating shaft 2025 drives the rotating disk 2026 to rotate, so that the needle cap can be cyclically loaded. The second gear 2024 is fixedly connected to the rotating shaft 2025. The rotating shaft 2025 is rotatably mounted on the bottom plate 201 through the bearing 2023. The bearing 2023 can support the rotating shaft 2025, and the bearing 2023 can assist the rotating shaft 2025 to rotate stably. The top of the rotating shaft 2025 is fixedly connected with the rotating disk 2026.

[0044] The test mechanism 100 includes a lifting assembly 101, on which a plurality of arc-shaped limiting assemblies 102 are arranged, and the limiting assemblies 102 limit the position of a detachable test block 103, and the detachable test block 103 is connected to one end of the lifting assembly 101;

[0045] The feeding assembly 202 drives the steering assembly 206 to drive the needle cap to rotate, and at the same time the transmission assembly 205 cooperates with the displacement of the annular assembly, so that the transmission assembly 205 and the steering assembly 206 transmit the steering of the needle cap at different positions, and the lifting assembly 101 releases the detachable test block 103 through the limit assembly 102 to perform a strength test on the needle cap.

[0046] In this embodiment: the motor 2021 drives the first gear 2022 and the second gear 2024 to transmit, so that the rotating shaft 2025 drives the turntable 2026 to rotate, and the turntable 2026 drives the needle cap to rotate through the steering wheel, and the roller 2052 moves on the annular plate 203, so that the roller 2052 enters the uphill portion 2033, and the bracket 2051 drives the dovetail slide rail 2054 to move upward, so that the tooth segment 2053 and the third gear 2063 are transmitted, so that the steering plate 2061 flips the tilt angle, so that the needle cap rotates, and as the slope of the uphill portion 2033 increases, the steering angle of the needle cap is different, thereby meeting the operation of automatically adjusting the angle of the needle cap, meeting the impact strength test of the needle cap at different angles, and improving the yield rate.

[0047] Example 2: Reference Figure 4-5 A needle cap strength testing device for a prefilled syringe comprises a lifting assembly 101, wherein the lifting assembly 101 comprises a fixing frame 1011, through which a multi-stage electric push rod 1012 can be lifted and fixed, and a detachable test block 103 can be lifted to a certain height, so as to facilitate an impact strength test of the needle cap. The fixing frame 1011 is fixedly connected to a bottom plate 201, and a multi-stage electric push rod 1012 is fixedly mounted on the fixing frame 1011. The multi-stage electric push rod 1012 is moved. When the multi-stage electric push rod 1012 is extended, the connecting plate 1013 drives the rope 1014 to move upward, and the rope 1014 drives the detachable test block 103 to move upward, so that the detachable test block 103 is smoothly lifted. The top of the multi-stage electric push rod 1012 is fixedly connected to the connecting plate 1013, and the lower ends of the connecting plate 1013 are fixedly connected to the rope 1014. When the connecting plate 1013 drops to the position of the top plate 1021, the rope 1014 is retracted. When the detachable test block 103 automatically falls downward, the rope 1014 can avoid affecting the falling of the detachable test block 103, and the portion where the rope 1014 passes through the fixing frame 1011 is provided with an opening, and the size of the opening is larger than the diameter of the rope 1014, so as to reduce the resistance of the rope 1014, and the rope 1014 passes through the fixing frame 1011 and is fixedly connected to the detachable test block 103, and the detachable test block 103 is composed of a top threaded head and a bottom threaded measuring block, and the bottom threaded measuring block is threaded with the top threaded head. The detachable test block 103 is connected to the top of the detachable test block 103, thereby achieving the purpose of fixing, and can also be disassembled for replacement. The telescopic rod 104 is fixedly connected to the top of the detachable test block 103, and the telescopic rod 104 can guide the detachable test block 103 to keep the detachable test block 103 sliding up and down smoothly, avoiding the problem of the rope 1014 being easy to shake when lifting the detachable test block 103, so that the inclined block 1029 corresponds to one end of the limit plate 1025, and the telescopic rod 104 is fixedly installed on the fixing frame 1011;

[0048] The limiting assembly 102 includes a top plate 1021, and two sliding rods 1024 and two springs 1022 are fixedly connected to the bottom of the top plate 1021. The sliding rod 1024 is slidably connected to the sliding sleeve 1023, and the sliding sleeve 1023 guides the sliding rod 1024 to keep the sliding sleeve 1023 sliding smoothly. The sliding sleeve 1023 is fixedly connected to the fixed frame 1011, and the top of the sliding sleeve 1023 is fixedly connected to the spring 1022. After the spring 1022 is reset, the sliding rod 1024 can be driven to reset upward, so that the connecting rod drives the limiting plate 1025 to move through the oblique opening 1027, so that the limiting plate 1025 is engaged with the inclined block 1029, thereby locking the position of the detachable test block 103. The bottom ends of the two sliding rods 1024 are fixedly connected to the same connecting shaft 1026, and the connecting shaft 1026 is slidably connected to the oblique opening 1027. Through the oblique setting of the oblique opening 1027, the connecting The movement of the shaft 1026 can squeeze the limit plate 1025 through the oblique opening 1027 to perform lateral translation movement. The oblique opening 1027 is provided on the limit plate 1025. The limit plate 1025 is slidably connected to the hole sleeve 1028. The hole sleeve 1028 guides the limit plate 1025 so that the limit plate 1025 slides smoothly, thereby making the limit plate 1025 smoothly locked with the inclined surface block 1029. The hole sleeve 1028 is fixedly connected to the fixing frame 10 The upper wall of 11, one end of the limit plate 1025 is a slope, and the limit plate 1025 is engaged with the slope block 1029. When the test block moves upward, the slope of the slope block 1029 is pressed upward against the slope of the limit plate 1025, so that the limit plate 1025 is away from the slope block 1029. At this time, the top of the slope block 1029 can be moved to the top of the limit plate 1025, and the slope block 1029 is fixedly connected to the top of the detachable test block 103.

[0049] In this embodiment: the multi-stage electric push rod 1012 is retracted to make the connecting plate 1013 move downward, and the connecting plate 1013 presses the top plate 1021 downward. The sliding rod 1024 drives the connecting shaft 1026 to move, so that the connecting shaft 1026 squeezes the limit plate 1025 through the oblique opening 1027 to generate displacement, so that the limit plate 1025 is separated from the inclined block 1029. At this time, the detachable test block 103 hits the needle cap through the acceleration of gravity, so that the strength of the needle caps at different angles can be tested simultaneously, thereby improving the detection efficiency.

[0050] Example 3: Reference Figure 2 , Figure 4-5 and Figure 8-11, a needle cap strength testing device for a prefilled syringe, comprising a feeding assembly 202, the feeding assembly 202 comprising a motor 2021, the motor 2021 being fixedly mounted on a bottom plate 201, the output shaft of the motor 2021 being fixedly connected with a first gear 2022, the first gear 2022 being meshed with a second gear 2024, the second gear 2024 being fixedly connected with a rotating shaft 2025, the rotating shaft 2025 being rotatably mounted on the bottom plate 201 through a bearing 2023, the top end of the rotating shaft 2025 being fixedly connected with a rotating disk 2026;

[0051] The transmission assembly 205 includes a bracket 2051, the upper wall and the lower wall of the bracket 2051 are fixedly connected with rollers 2052, the two rollers 2052 slide on the upper and lower sides of the annular plate 203 respectively, a dovetail guide rail 2054 is fixedly connected to the upper side of the bracket 2051, a tooth segment 2053 is fixedly connected to the dovetail guide rail 2054, the dovetail guide rail 2054 is slidably connected to the dovetail guide rail 2055, and the dovetail guide rail 2055 is fixedly connected to the turntable 2026;

[0052] A fixing rod 2031 is fixedly connected to the lower part of the annular plate 203, and the fixing rod 2031 is fixedly connected to the bottom plate 201. The annular plate 203 includes an arc-shaped portion 2032, and an upslope portion 2033 and a downslope portion 2034 are respectively provided at both ends of the arc-shaped portion 2032. The upslope portion 2033 is connected to the downslope portion 2034, and the slope of the portion of the upslope portion 2033 extending to the downslope portion 2034 increases;

[0053] The steering assembly 206 includes a steering plate 2061, which is rotatably connected to the turntable 2026 via a pin shaft 2064. A third gear 2063 is fixedly connected to the middle of the pin shaft 2064, and the third gear 2063 is meshed with the tooth segment 2053. A needle head 2062 is installed on the steering plate 2061, and a needle cap is engaged with the needle head 2062.

[0054] In this embodiment: the motor 2021 drives the first gear 2022 and the second gear 2024 to transmit, so that the rotating shaft 2025 drives the needle shield to rotate through the rotating disk 2026, so that the needle shield changes its position, and when the roller 2052 moves to the uphill portion 2033, the roller 2052 moves upward, and the tooth segment 2053 can transmit with the third gear 2063, so that the angle of the needle shield can be changed, and the angle of the needle shield at different positions can be changed according to the slope of the uphill portion 2033. The needle cap can not only meet the purpose of continuous feeding, but also continuously change the angle of the needle cap to meet the continuous detection operation of the needle cap. Then, the needle cap strength test is performed, so that the roller 2052 enters the downslope portion 2034 and resets downward through the downslope portion 2034. At this time, the steering plate 2061 rotates and resets to remain horizontal, so that the needle cap remains in an upright state and then moves to the position of the airtight detection device 204, thereby meeting the continuous airtightness detection operation of the needle cap and improving the detection efficiency.

[0055] A method for detecting a needle cap strength detection device for a prefilled syringe comprises the following steps:

[0056] S1. When testing the needle cap, the needle cap is engaged with the needle head 2062 and positioned. Then, the motor 2021 drives the first gear 2022 to rotate. The first gear 2022 and the second gear 2024 are driven. The second gear 2024 drives the shaft 2025 to rotate. The shaft 2025 drives the turntable 2026 to rotate. After the turntable 2026 rotates, the needle cap follows the movement. At the same time, the roller 2052 moves along the annular plate 203. When the roller 2052 moves to the annular plate 203, the needle cap is rotated. The upslope portion 2033 of the shaped plate 203 causes the push roller 2052 on the inclined surface of the upslope portion 2033 to drive the bracket 2051 to move upward, so that the bracket 2051 drives the dovetail slide rail 2054 to move upward, so that the tooth segment 2053 and the third gear 2063 are transmitted, and the third gear 2063 drives the pin shaft 2064 and the steering plate 2061 to rotate, so that the steering plate 2061 drives the needle guard cap to rotate. Since the slope of the upslope portion 2033 gradually increases, the rotation direction of each needle guard cap is different;

[0057] S2. When the needle guard cap is at different angles, the multi-stage electric push rod 1012 retracts to drive the connecting plate 1013 to move downward. When the connecting plate 1013 contacts the top plate 1021 downward, the top plate 1021 drives the sliding rod 1024 to move downward. The sliding rod 1024 drives the connecting shaft 1026 to move, so that the connecting shaft 1026 squeezes the limit plate 1025 through the oblique opening 1027 to move, and the limit plate 1025 is separated from the inclined block 1029. At this time, the detachable test block 103 moves downward by its own gravity acceleration, so that the detachable test block 103 hits the needle guard cap downward, thereby meeting the strength test of the needle guard cap at different angles;

[0058] S3, then the roller 2052 moves downward through the downslope portion 2034, so that the tooth segment 2053 and the third gear 2063 are transmitted, so that the steering plate 2061 is flipped and reset to keep horizontal, so that the needle cap is kept vertical, and when the needle cap is located at the position of the airtight detection device 204, the airtight detection device 204 performs a detection operation on the needle cap.

[0059] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A needle cap strength testing device for a prefilled syringe, comprising a testing mechanism (200), characterized in that: The detection mechanism (200) is equipped with a testing mechanism (100); The detection mechanism (200) comprises a base plate (201), an airtightness detection device (204) is fixedly mounted above the base plate (201), an annular plate (203) and a feeding assembly (202) are arranged in the middle of the upper part of the base plate (201), the annular plate (203) is located below the feeding assembly (202), a plurality of transmission assemblies (205) are slidably connected to the annular plate (203), the transmission assemblies (205) are transmitted to the steering assembly (206), and the steering assembly (206) is arranged on the feeding assembly (202); The testing mechanism (100) comprises a lifting component (101), a plurality of arc-shaped limiting components (102) are provided on the lifting component (101), the limiting components (102) limit the position of a detachable testing block (103), and the detachable testing block (103) is connected to one end of the lifting component (101); The feeding assembly (202) drives the steering assembly (206) to rotate the needle guard cap, and the transmission assembly (205) cooperates with the displacement of the annular assembly, so that the transmission assembly (205) and the steering assembly (206) are driven to realize the steering of the needle guard cap at different positions, and the lifting assembly (101) releases the detachable test block (103) through the limit assembly (102) to perform a strength test on the needle guard cap; A fixing rod (2031) is fixedly connected below the annular plate (203), the fixing rod (2031) being fixedly connected to the bottom plate (201), the annular plate (203) comprising an arc-shaped portion (2032), an upslope portion (2033) and a downslope portion (2034) being respectively arranged at both ends of the arc-shaped portion (2032), the upslope portion (2033) being connected to the downslope portion (2034), and the slope of the portion where the upslope portion (2033) extends to the downslope portion (2034) is increased; The feeding assembly (202) comprises a motor (2021), the motor (2021) is fixedly mounted on the bottom plate (201), the output shaft of the motor (2021) is fixedly connected to a first gear (2022), the first gear (2022) is meshed with a second gear (2024), the second gear (2024) is fixedly connected to a rotating shaft (2025), the rotating shaft (2025) is rotatably mounted on the bottom plate (201) via a bearing (223), and the top end of the rotating shaft (2025) is fixedly connected to a rotating disk (2026); The transmission assembly (205) comprises a bracket (2051), the upper wall and the lower wall of the bracket (2051) are both fixedly connected with rollers (2052), the two rollers (2052) slide on the upper and lower sides of the annular plate (203) respectively, a dovetail slide rail (2054) is fixedly connected above the bracket (2051), a tooth segment (2053) is fixedly connected to the dovetail slide rail (2054), the dovetail slide rail (2054) is slidably connected to the dovetail guide rail (2055), and the dovetail guide rail (2055) is fixedly connected to the turntable (2026); The steering assembly (206) comprises a steering plate (2061), the steering plate (2061) being rotatably connected to the turntable (2026) via a pin shaft (2064), a third gear (2063) being fixedly connected to the middle portion of the pin shaft (2064), the third gear (2063) being meshed with the tooth segment (2053), a needle head (2062) being mounted on the steering plate (2061), and a needle head protective cap being engaged with the needle head (2062).

2. The needle cap strength testing device for a prefilled syringe according to claim 1, characterized in that: The lifting assembly (101) comprises a fixing frame (1011), the fixing frame (1011) being fixedly connected to a base plate (201), a multi-stage electric push rod (1012) being fixedly mounted on the fixing frame (1011), a connecting plate (1013) being fixedly connected to the top of the multi-stage electric push rod (1012), ropes (1014) being fixedly connected below multiple ends of the connecting plate (1013), and the ropes (1014) passing through the fixing frame (1011) and being fixedly connected to the detachable test block (103).

3. The needle cap strength testing device for a prefilled syringe according to claim 1, characterized in that: A telescopic rod (104) is fixedly connected to the top of the detachable test block (103), and the telescopic rod (104) is fixedly mounted on a fixing frame (1011).

4. The needle cap strength testing device for a prefilled syringe according to claim 2, characterized in that: The limit assembly (102) comprises a top plate (1021), two sliding rods (1024) and two springs (1022) are fixedly connected to the bottom of the top plate (1021), the sliding rods (1024) are slidably connected in the sliding sleeves (1023), the sliding sleeves (1023) are fixedly connected to the fixing frame (1011), the top of the sliding sleeves (1023) is fixedly connected to the springs (1022), and the bottom ends of the two sliding rods (1024) are fixedly connected to the same connecting shaft (1026).

5. The needle cap strength testing device for a prefilled syringe according to claim 4, characterized in that: The connecting shaft (1026) is slidably connected in the oblique opening (1027), the oblique opening (1027) is provided on the limit plate (1025), the limit plate (1025) is slidably connected in the hole sleeve (1028), the hole sleeve (1028) is fixedly connected to the upper wall of the fixing frame (1011), one end of the limit plate (1025) is an inclined surface, the limit plate (1025) is engaged with the inclined surface block (1029), and the inclined surface block (1029) is fixedly connected above the detachable test block (103).

6. The detection method of the needle cap strength detection device for a prefilled syringe according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. When performing a needle cap test, the needle cap is engaged with the needle head (2062) and positioned. Then, the motor (221) drives the first gear (2022) to rotate. The first gear (2022) and the second gear (2024) are driven to transmit the transmission. The second gear (2024) drives the rotating shaft (225) to rotate. The rotating shaft (225) drives the rotating disk (226) to rotate. After the rotating disk (2026) rotates, the needle cap follows the movement. At the same time, the roller (2052) moves along the annular plate (203). When the roller (2052) moves to the annular plate (203), the needle cap moves to the annular plate (203). The upslope portion (2033) of the plate (203) causes the push roller (2052) on the inclined surface of the upslope portion (2033) to drive the bracket (2051) to move upward, so that the bracket (2051) drives the dovetail slide rail (2054) to move upward, so that the tooth segment (2053) and the third gear (2063) are driven to rotate, and the third gear (2063) drives the pin shaft (2064) and the steering plate (2061), so that the steering plate (2061) drives the needle guard cap to rotate. Since the slope of the upslope portion (2033) gradually increases, the rotation direction of each needle guard cap is different. S2. When the needle guard cap is at different angles, the multi-stage electric push rod (1012) is retracted to drive the connecting plate (1013) to move downward. When the connecting plate (1013) contacts the top plate (1021) downward, the top plate (1021) drives the sliding rod (1024) to move downward. The sliding rod (1024) drives the connecting shaft (1026) to move, so that the connecting shaft (1026) squeezes the limit plate (1025) through the oblique opening (1027) to move. The limit plate (1025) is separated from the inclined surface block (1029). At this time, the detachable test block (103) moves downward by its own gravity acceleration, so that the detachable test block (103) hits the needle guard cap downward, thereby meeting the strength test of the needle guard cap at different angles; S3, the roller (2052) then moves downward through the downslope portion (2034), causing the tooth segment (2053) to transmit to the third gear (2063), thereby causing the steering plate (2061) to flip and reset to remain horizontal, causing the needle guard cap to remain vertical, and when the needle guard cap is located at the position of the airtight detection device (204), the airtight detection device (204) performs a detection operation on the needle guard cap.

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