An infusion pump pushrod assembly detection fixture

Abstract

The present application relates to infusion pump push rod detection technical field, and disclose a kind of infusion pump push rod assembly detection tool, including test body, the upper surface of test body is equipped with bottom plate, the surface of bottom plate is fixedly connected with tool seat, the surface of tool seat is equipped with multiple groups of placement slot for placing infusion pump push rod, the infusion pump push rod to be detected is placed in the placement slot on the surface of tool seat in the present application, then support assembly supports infusion pump push rod tail portion, and infusion pump push rod interface is connected with photoelectric switch, pushing assembly can open the gripper in infusion pump push rod, driving assembly can drive movement component and detection component to move, when gripper is normally unfolded, detection component extrudes pressure sensor, photoelectric switch opens, realizes detection operation, when gripper is not normally unfolded, detection component cannot contact pressure sensor, solve the problem that traditional equipment function is single, need multiple equipment cooperation, simplify detection procedure.

Description

Technical Field

[0001] This invention relates to the field of injection pump push rod testing technology, specifically to a testing fixture for injection pump push rod assemblies. Background Technology

[0002] Infusion pumps are core equipment for precise clinical infusion. Through mechanical drive, they achieve quantitative and rate-controlled infusion of medication, precisely controlling the infusion flow rate and volume, avoiding errors caused by manual adjustment. They are suitable for scenarios with high requirements for infusion accuracy, such as intensive care, chemotherapy, and pediatrics, ensuring medication safety and treatment efficacy. The infusion pump push rod is its core actuator. As a key structure for power transmission, it is linked with the pump's drive mechanism and pushes the infusion set's reservoir or piston through linear reciprocating motion, smoothly pushing the medication into the infusion line according to the set parameters.

[0003] The infusion pump push rod has a built-in pressure sensor used to precisely control the threshold range of injection force. The performance testing of this sensor is a key process in the extrusion rod production. Existing testing equipment has insufficient adaptability and cannot efficiently test the sensor based on the structural characteristics of the infusion pump push rod. At the same time, some testing equipment has limited functions and can only perform basic performance testing, which cannot meet the multi-dimensional testing needs. Moreover, the operation process is cumbersome, and the adaptability and practicality are poor, making it difficult to meet the testing requirements of large-scale production of extrusion rods, thus restricting the improvement of production efficiency and testing accuracy.

[0004] Therefore, we propose a testing fixture for the injection pump push rod assembly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a testing fixture for injection pump push rod assemblies. This solves the problem of insufficient adaptability of existing testing equipment, which makes it difficult to perform efficient sensor testing based on the structural characteristics of injection pump push rods. Furthermore, some testing equipment has limited functionality, only capable of basic performance testing, and cannot meet multi-dimensional testing needs. Moreover, the operation process is cumbersome, and the adaptability and practicality are poor, making it difficult to match the testing requirements of large-scale production of extrusion rods, thus hindering the improvement of production efficiency and testing accuracy.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing fixture for an infusion pump push rod assembly, comprising a testing body, a base plate mounted on the upper surface of the testing body, a fixture seat fixedly connected to the surface of the base plate, multiple placement slots for placing the infusion pump push rod on the surface of the fixture seat, multiple support components mounted on the base plate for supporting the tail end of the infusion pump push rod, two guide rails fixedly connected to the surface of the base plate, guide rail blocks slidably connected to the surfaces of the two guide rail blocks, a movable seat mounted on the surfaces of the movable seat, multiple testing components mounted on the movable seat for simulating the maximum outer diameter of a syringe, and a driving component provided on the base plate for controlling the movement of the movable seat, wherein the testing components compress and test the infusion pump push rod;

[0007] The test unit is equipped with a display screen on its surface and a PLC control board inside. A photoelectric switch is located on one side of the base plate, which is adjacent to the support assembly. A positioning detection assembly is located between the moving base and the base plate. The surface of the fixture base is also equipped with multiple sets of pushing assemblies to control the knob in the injection pump push rod, allowing the grippers to open. During testing, the injection pump push rod can be placed in the mounting groove on the surface of the fixture base. Simultaneously, the support assembly supports the tail end of the injection pump push rod and connects the signal wire connector in the injection pump push rod to the photoelectric switch. Then, by pushing the assembly, the gripper in the injection pump push rod is opened to its maximum. The drive assembly can move the moving base and the clamping assembly. When the gripper in the injection pump push rod is normally opened to its maximum, the detection assembly can squeeze out the pressure sensor in the injection pump push rod, the photoelectric switch is turned on, and the display screen shows the data. If the gripper is not normal, the detection assembly cannot properly trigger the pressure sensor for detection.

[0008] Preferably, the photoelectric sensor, PLC control board, display screen and photoelectric sensor are connected by wires. The photoelectric switch is used to receive pressure sensor data in the injection pump push rod and transmit the data to the display screen through the PLC control board for display.

[0009] Preferably, the support assembly includes a support base mounted on the surface of the base plate, the surface of which has an arc-shaped groove for supporting the tail end of the injection pump push rod.

[0010] Preferably, the detection component includes a positioning seat fixed to the surface of the movable seat, and a push block is fixedly connected to the surface of the positioning seat.

[0011] Preferably, the pusher is arranged in a ring shape, and the diameter of the pusher is 35mm.

[0012] Preferably, the drive assembly includes two fixed seats mounted on the surface of the base plate. A threaded rod is rotatably connected inside the fixed seats. The threaded rod is threadedly connected to the inner wall of the movable seat. A drive motor is mounted on the surface of the base plate. A coupling is mounted on the output end of the drive motor. The other end of the coupling is fixedly connected to the threaded rod. Through the above components, during the drive process, when the drive motor is turned on, the drive motor can drive the threaded rod to rotate through the coupling. The threaded rod drives the guide block on the movable seat to move linearly along the guide rail, thereby realizing the detection operation.

[0013] Preferably, the pushing assembly includes a fixed plate mounted on the surface of the tooling base. A fixed frame is fixedly connected to the surface of the fixed plate, a handle is rotatably connected to the surface of the fixed frame, a connecting arm is rotatably connected to the surface of the handle, and a pressing rod is slidably connected to the inner wall of the fixed frame. The connecting arm is rotatably connected to the inner wall of the pressing rod. Through the above components, during use, the handle can be rotated, and the handle, in conjunction with the connecting arm, can drive the pressing rod to slide within the fixed frame. When the pressing rod moves, it can push the knob in the injection pump push rod, thereby causing the gripper to open.

[0014] Preferably, the extrusion rod includes a rod body and a rubber head, the rubber head being fixed to one end of the rod body.

[0015] Preferably, the positioning detection component includes an auxiliary component fixed to the surface of the movable seat, and positioning switch one and positioning switch two are respectively installed on the surface of the base plate for detecting the position of the auxiliary component and the movable seat.

[0016] In summary, the technical effects and advantages of this invention are as follows:

[0017] 1. In this invention, the infusion pump push rod to be tested is placed in the placement groove on the surface of the tooling base. Then, the support assembly supports the tail of the infusion pump push rod and connects the interface of the infusion pump push rod to the photoelectric switch. The pushing assembly can open the gripper in the infusion pump push rod, and the driving assembly can drive the moving assembly and the detection assembly to move. When the gripper is properly extended, the detection assembly squeezes the pressure sensor, and the photoelectric switch is turned on to realize the detection operation. When the gripper is not properly extended, the detection assembly cannot contact the pressure sensor. This solves the problem of traditional equipment having a single function and requiring multiple devices to cooperate, and simplifies the detection process.

[0018] 2. In this invention, the pusher block in the detection component is a circular ring. The 35mm pusher block simulates the maximum outer diameter of the syringe to determine whether the gripper unfolding angle is normal.

[0019] 3. In this invention, by setting a pushing component, the knob in the infusion pump push rod can be pushed quickly, allowing the grippers in the infusion pump push rod to quickly expand to their maximum size. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the test state structure of a testing fixture for an infusion pump push rod assembly according to the present invention;

[0021] Figure 2 This is a side view of a testing fixture for an infusion pump push rod assembly according to the present invention.

[0022] Figure 3 This is a schematic diagram of another perspective of the testing fixture for an infusion pump push rod assembly according to the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a testing fixture for an infusion pump push rod assembly according to the present invention;

[0024] Figure 5 This invention provides a testing fixture for an infusion pump pusher assembly. Figure 4 Partial structural diagram;

[0025] Figure 6 This is a schematic diagram of the moving seat structure of a testing fixture for an infusion pump push rod assembly according to the present invention;

[0026] Figure 7 This is a schematic diagram of the fixture seat structure of a testing fixture for an injection pump push rod assembly according to the present invention.

[0027] In the diagram: 1. Test body; 2. Display screen; 3. PLC control board; 4. Photoelectric switch; 5. Support assembly; 51. Support base; 52. Arc groove; 6. Auxiliary parts; 7. Position switch one; 8. Position switch two; 9. Guide rail; 10. Push assembly; 101. Fixing plate; 102. Fixing frame; 103. Extrusion rod; 1031. Rod body; 1032. Rubber head; 104. Handle; 105. Connecting arm; 11. Drive assembly; 111. Fixing base; 112. Threaded rod; 113. Drive motor; 114. Coupling; 12. Moving base; 13. Guide rail block; 14. Detection assembly; 141. Positioning base; 142. Push block; 15. Tooling base; 16. Placement groove; 17. Base plate; I. Injection pump push rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] refer to Figure 1 - Figure 7The invention illustrates a testing fixture for an infusion pump pusher I assembly, comprising a test body 1, a base plate 17 mounted on the upper surface of the test body 1, a fixture base 15 fixedly connected to the surface of the base plate 17, multiple placement slots 16 for placing the infusion pump pusher I on the surface of the fixture base 15, multiple support components 5 mounted on the base plate 17 for supporting the tail end of the infusion pump pusher I, two guide rails 9 fixedly connected to the surface of the base plate 17, guide rail blocks 13 slidably connected to the surfaces of the two guide rails 9, and movable seats 12 mounted on the surfaces of the two guide rail blocks 13. Multiple testing components 14 are mounted on the movable seats 12 to simulate the maximum syringe outer diameter. A drive component 11 is also provided on the base plate 17 for... The control unit 12 moves, and the detection component 14 presses and tests the injection pump push rod I. The surface of the test body 1 is equipped with a display screen 2, and the PLC control board 3 is installed inside. The base plate 17 is located on one side of the support component 5 and is equipped with a photoelectric switch 4. The position detection component 14 is set between the moving base 12 and the base plate 17. The surface of the tooling base 15 is also equipped with multiple sets of push components 10, which are used to control the knob in the injection pump push rod I to open the gripper. The photoelectric sensor, PLC control board 3, display screen 2 and photoelectric sensor are connected by wires. The photoelectric switch 4 is used to receive the pressure sensor data in the injection pump push rod I and transmit the data to the display screen 2 for display through the PLC control board 3.

[0030] In this implementation scheme: During the testing process, the infusion pump push rod I can be placed in the mounting groove on the surface of the tooling base 15. At the same time, the support component 5 supports the tail end of the infusion pump push rod I, and the signal line connector in the infusion pump push rod I is connected to the photoelectric switch 4. Then, by pushing the component 10, the clamp in the infusion pump push rod I is opened to the maximum. The drive component 11 can drive the moving base 12 and the clamping component to move. When the clamp in the infusion pump push rod I is normally opened to the maximum, the detection component 14 can squeeze out the pressure sensor in the infusion pump push rod I, the photoelectric switch 4 is turned on, and the display screen 2 displays the data. When the clamp is abnormal, the detection component 14 cannot trigger the pressure sensor to perform detection normally.

[0031] The support assembly 5 includes a support base 51 mounted on the surface of the base plate 17. The surface of the support base 51 is provided with an arc-shaped groove 52 for supporting the tail end of the injection pump push rod I.

[0032] The detection component 14 includes a positioning seat 141 fixed on the surface of the movable seat 12. A push block 142 is fixedly connected to the surface of the positioning seat 141. The push block 142 is arranged in a ring and has a diameter of 35mm.

[0033] The drive assembly 11 includes two fixed seats 111 mounted on the surface of the base plate 17. A threaded rod 112 is rotatably connected inside the fixed seat 111. The threaded rod 112 is threadedly connected to the inner wall of the movable seat 12. A drive motor 113 is mounted on the surface of the base plate 17. A coupling 114 is mounted on the output end of the drive motor 113. The other end of the coupling 114 is fixedly connected to the threaded rod 112.

[0034] In this implementation scheme: During the driving process, the drive motor 113 is turned on, and the drive motor 113 can drive the threaded rod 112 to rotate through the coupling 114. The threaded rod 112 drives the guide block 13 on the moving seat 12 to move linearly along the guide rail 9 to realize the detection operation.

[0035] The pushing component 10 includes a fixed plate 101 mounted on the surface of the tooling base 15. A fixed frame 102 is fixedly connected to the surface of the fixed plate 101. A handle 104 is rotatably connected to the surface of the fixed frame 102. A connecting arm 105 is rotatably connected to the surface of the handle 104. A pressing rod 103 is slidably connected to the inner wall of the fixed frame 102. The connecting arm 105 is rotatably connected to the inner wall of the pressing rod 103. The pressing rod 103 includes a rod body 1031 and a rubber head 1032. The rubber head 1032 is fixed to one end of the rod body 1031.

[0036] In this embodiment: During use, the handle 104 can be rotated. The handle 104, in conjunction with the connecting arm 105, can drive the extrusion rod 103 to slide in the fixed frame 102. When the extrusion rod 103 moves, it can push the knob in the infusion pump push rod I, thereby causing the gripper to open.

[0037] The positioning detection component 14 includes an auxiliary component 6 fixed on the surface of the movable seat 12, and positioning switches 7 and 8 are respectively installed on the surface of the base plate 17 to detect the position of the auxiliary component 6 and the movable seat 12.

[0038] Working principle of this invention: During use, the operator logs into the test unit 1 and places multiple infusion pump push rods I to be tested into the corresponding placement slots 16 on the surface of the fixture 15. Simultaneously, the arc-shaped groove 52 on the surface of the support base 51 supports the tail end of the infusion pump push rod I. Then, the interface in the infusion pump push rod I is connected to the photoelectric switch 4. Simultaneously, pushing the push assembly 10 on the fixture 15 rotates the handle 104. The handle 104, in conjunction with the connecting arm 105, drives the extrusion rod 103 to slide within the fixed frame 102. When the extrusion rod 103 moves, the rod body 1031, in conjunction with the rubber head 1032, pushes the knob in the infusion pump push rod I, thereby opening the gripper. This allows for simultaneous testing at multiple stations or single-station testing. During testing, the drive motor 113 is turned on to drive... Motor 113 can drive threaded rod 112 to rotate via coupling 114. Threaded rod 112 drives guide block 13 on movable seat 12 to move linearly along guide rail 9. Movable seat 12 drives positioning seat 141 and push block 142 to move. When the gripper of infusion pump push rod I is normally open, push block 142 can contact the pressure sensor in infusion pump push rod I. The pressure block then presses the pressure sensor button, outputting a pressure value. If it is within the range of 44N±5N, it is OK. The diameter of the pressure block is 35mm, simulating the maximum outer diameter of the syringe. When the gripper opening angle is small, the pressure block cannot contact the pressure sensor button, and photoelectric switch 4 is not triggered, resulting in NG. Such data is displayed on display screen 2. If the test result shows OK, it means that the opening angle is normal and the pressure sensor is normal. After the test is completed, release the signal line, release the quick clamp, remove the product, and turn off the power.

[0039] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing fixture for an infusion pump push rod assembly, comprising a testing body (1), characterized in that: The upper surface of the test body (1) is equipped with a base plate (17), and a tooling seat (15) is fixedly connected to the surface of the base plate (17). The surface of the tooling seat (15) is provided with multiple sets of placement slots (16) for placing the infusion pump push rod. Multiple support components (5) are also installed on the base plate (17) to support the tail end of the infusion pump push rod. Two guide rails (9) are fixedly connected to the surface of the base plate (17). Guide rail blocks (13) are slidably connected to the surfaces of the two guide rails (9). Movable seats (12) are installed on the surfaces of the two guide rail blocks (13). Multiple sets of detection components (14) are installed on the movable seats (12) to simulate the maximum outer diameter of the syringe. A drive component (11) is also provided on the base plate (17) to control the movement of the movable seats (12). The detection components (14) squeeze the test infusion pump push rod. The test body (1) is equipped with a display screen (2) on its surface and a PLC control board (3) inside. The base plate (17) is located on one side of the support assembly (5) and is equipped with a photoelectric switch (4). The movable seat (12) and the base plate (17) are equipped with a positioning detection assembly (14). The surface of the tooling seat (15) is also equipped with multiple sets of push assemblies (10) to control the knob in the injection pump push rod to open the gripper. The pushing assembly (10) includes a fixed plate (101) mounted on the surface of the tooling base (15), a fixed frame (102) fixedly connected to the surface of the fixed plate (101), a handle (104) rotatably connected to the surface of the fixed frame (102), a connecting arm (105) rotatably connected to the surface of the handle (104), a pressing rod (103) slidably connected to the inner wall of the fixed frame (102), and the connecting arm (105) rotatably connected to the inner wall of the pressing rod (103). The extrusion rod (103) includes a rod body (1031) and a rubber head (1032), the rubber head (1032) being fixed to one end of the rod body (1031).

2. The testing fixture for an infusion pump push rod assembly according to claim 1, characterized in that: The photoelectric sensor, PLC control board (3), display screen (2) and photoelectric sensor are connected by wires. The photoelectric switch (4) is used to receive the pressure sensor data in the injection pump push rod and transmit the data to the display screen (2) through the PLC control board (3) for display.

3. The testing fixture for an infusion pump push rod assembly according to claim 1, characterized in that: The support assembly (5) includes a support base (51) mounted on the surface of the base plate (17), and the surface of the support base (51) is provided with an arc groove (52) for supporting the tail end of the injection pump push rod.

4. The testing fixture for an infusion pump push rod assembly according to claim 1, characterized in that: The detection component (14) includes a positioning seat (141) fixed on the surface of the movable seat (12), and a push block (142) is fixedly connected to the surface of the positioning seat (141).

5. The testing fixture for an infusion pump push rod assembly according to claim 4, characterized in that: The push block (142) is arranged in a ring shape, and the diameter of the push block (142) is 35mm.

6. The testing fixture for an infusion pump push rod assembly according to claim 1, characterized in that: The drive assembly (11) includes two fixed seats (111) mounted on the surface of the base plate (17). A threaded rod (112) is rotatably connected inside the fixed seat (111). The threaded rod (112) is threadedly connected to the inner wall of the movable seat (12). A drive motor (113) is mounted on the surface of the base plate (17). A coupling (114) is mounted on the output end of the drive motor (113). The other end of the coupling (114) is fixedly connected to the threaded rod (112).

7. The testing fixture for an infusion pump push rod assembly according to claim 1, characterized in that: The positioning detection component (14) includes an auxiliary component (6) fixed on the surface of the movable seat (12). Position switch one (7) and position switch two (8) are respectively installed on the surface of the base plate (17) for detecting the position of the auxiliary component (6) and the movable seat (12).

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