Efficient assembly type blood collection tube cap device
By combining the support groove, negative pressure pump and brush, the rapid positioning of the plastic cap and the automated assembly of the rubber stopper are achieved, solving the problem of low assembly efficiency in the existing technology and improving the assembly efficiency and process safety of blood collection tube caps.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN MINGYUAN WELLCOME TECH CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-06-23
AI Technical Summary
In the existing technology, the assembly efficiency of blood collection tube caps is low, especially when distinguishing the front and back, which takes a long time and affects the efficiency of the blood collection process.
By designing a combination of support grooves, a negative pressure pump, and a brush, the plastic cover is adsorbed by negative pressure and positioned with the opening facing upwards. The rubber stopper is then quickly inserted and pressed into the cover, achieving automated assembly.
This improved the assembly efficiency of blood collection tube caps, reduced manual operation time, and enhanced the safety and efficiency of the blood collection process.
Smart Images

Figure CN224394553U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blood collection tube cap assembly technology, specifically a high-efficiency assembled blood collection tube cap device. Background Technology
[0002] Blood collection tube caps are mostly made of plastic and come in various colors. Different colors correspond to different additives and uses. For example, red caps have no additives and are used for serum testing; purple caps contain the anticoagulant EDTA and are suitable for routine blood tests; green caps contain lithium heparin and can be used for biochemical tests. The cap design needs to be well-sealed to prevent sample leakage or contamination, while also being easy to open and puncture to ensure a safe and efficient blood collection process. Blood collection tube caps consist of a plastic cap shell and a rubber stopper. During assembly, the rubber stopper needs to be placed inside the plastic cap shell, and then the rubber stopper is pressed tightly into the inside of the plastic cap shell.
[0003] To achieve low-cost production, existing technologies still rely on semi-automatic assembly equipment for blood collection tube caps, which involves manual feeding. Since the plastic caps have a front and back, the opening of the cap must face upwards before a rubber stopper is pre-inserted and then pressed into the cap to complete the assembly. Although the rubber stopper can be quickly pre-inserted into the cap without distinguishing between front and back, the process of placing the caps requires careful orientation, which is time-consuming and hinders efficient assembly. Therefore, we propose a highly efficient assembly device for blood collection tube caps. Utility Model Content
[0004] The purpose of this invention is to provide a highly efficient assembled blood collection tube cap device. By using support grooves to support the plastic cap shell, and utilizing the air extraction and inlet holes connected to the negative pressure pump in conjunction with the brushing action of the brush, the plastic cap shell with its opening facing upwards can be quickly and easily positioned and locked in different support grooves. This facilitates the quick and easy positioning of the plastic cap shell and the insertion of the rubber stopper. Subsequently, the rubber stopper is pressed into the plastic cap shell, which improves the assembly efficiency of the blood collection tube cap and solves the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency assembled blood collection tube cap device, comprising a workbench and an upper plate. The upper plate is supported above the workbench by support rods at its four bottom corners. Electric push rods are vertically installed on both sides of the upper plate surface. A lifting plate placed below the upper plate is horizontally fixed at the end of the electric push rods. Multiple abutment rods are vertically and evenly fixed at the bottom of the lifting plate. Multiple support grooves are evenly opened on the surface of the workbench, placed directly below different abutment rods. Air extraction holes and air inlets are opened on the bottom surface of the support grooves. An air extraction pipe is connected below the air extraction hole, and the air inlet is connected to the bottom of the workbench.
[0006] By adopting the above technical solution, the plastic cap can be quickly adsorbed and placed in the support groove using negative pressure adsorption, and positioned with its opening facing upwards. This facilitates the quick pre-insertion of the rubber stopper and its pressing into the plastic cap to complete the assembly, resulting in higher efficiency for manual assembly.
[0007] Optionally, the surface of the workbench is provided with a transverse groove, and the support groove is placed on the workbench surface within the transverse groove.
[0008] By adopting the above technical solution, it is easy to place the plastic cover on one side inside the transverse groove, and then brush it to the other side to quickly place it into the support groove.
[0009] Optionally, both ends of the transverse groove are connected to the side, and the transverse groove is located at the middle position of the front and back of the worktable surface.
[0010] By adopting the above technical solution, when adsorbing and fixing the plastic cap, the brush moves to one side to facilitate the sweeping out and collection of excess plastic cap, and after assembly, the brush moves to the other side to facilitate the collection of the assembled blood collection tube cap.
[0011] Optionally, a stop plate is fixed to the bottom end of the stop rod, and the stop plate is fixed to the end of the stop rod by welding.
[0012] By adopting the above technical solution, a larger area of the abutment plate makes it easier to press the rubber stopper into the plastic cap.
[0013] Optionally, the workbench is supported by four legs at its bottom corners, and the legs are all the same height.
[0014] By adopting the above technical solution, the workbench is supported by multiple legs of the same height.
[0015] Optionally, the diameter of the air inlet is equal to the diameter of the air extraction port.
[0016] By adopting the above technical solution, when the plastic cover is supported in the groove with the opening facing downwards, the speed of air intake and exhaust is not affected by the difference in aperture, thus avoiding the adsorption force on the plastic cover.
[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:
[0018] 1. The technical solution of this application utilizes support grooves to support the plastic cover shell. By using the air extraction hole and air inlet connected to the negative pressure pump in conjunction with the brushing action of the brush, the plastic cover shell with its opening facing upwards can be quickly placed and locked in different support grooves. This facilitates the quick positioning of the plastic cover shell and the insertion of the rubber stopper. Subsequently, the rubber stopper is pressed into the plastic cover shell, which can improve the assembly efficiency of the blood collection tube cap.
[0019] 2. The technical solution of this application makes the two ends of the transverse groove connected to the side, so that during use, it is convenient to sweep out and collect the excess plastic cap from one side, and convenient to sweep out and collect the pre-fitted blood collection tube cap from the other side. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency assembled blood collection tube cap device of this utility model;
[0022] Figure 2 This is a detailed structural diagram of the support groove of the high-efficiency assembled blood collection tube cap device of this utility model;
[0023] Figure 3 This is a schematic diagram of the bottom structure of the lifting plate of the high-efficiency assembled blood collection tube cap device of this utility model;
[0024] Figure 4 This is a schematic diagram of the structure of the plastic cover shell of the high-efficiency assembled blood collection tube cap device of this utility model with the opening facing downwards.
[0025] Figure 5 This is a schematic diagram of the structure of the plastic cover shell of the high-efficiency assembled blood collection tube cap device of this utility model when the opening is facing upwards.
[0026] In the diagram: 1. Workbench; 11. Horizontal groove; 12. Support leg; 2. Top plate; 21. Electric actuator; 22. Lifting plate; 221. Support rod; 222. Support plate; 23. Support rod; 3. Support groove; 31. Air extraction hole; 311. Air extraction pipe; 32. Air inlet; 4. Plastic cover. Detailed Implementation
[0027] Please see Figure 1-5 This utility model provides a technical solution: a high-efficiency assembled blood collection tube cap device, including a workbench 1 and an upper plate 2. The bottom four corners of the workbench 1 are supported by support legs 12, and the support legs 12 are of the same height, so that the workbench 1 is horizontally supported on the ground. The upper plate 2 is supported above the workbench 1 by support rods 23 at its bottom four corners, and the upper plate 2 is parallel to the surface of the workbench 1.
[0028] Electric actuators 21 are vertically installed on both sides of the surface of the upper plate 2. The protruding end of the electric actuator 21 extends through to the bottom of the upper plate 2, and a lifting plate 22 placed below the upper plate 2 is horizontally fixed at the end of the electric actuator 21. Multiple abutments 221 are vertically and evenly fixed at the bottom of the lifting plate 22. In use, the electric actuators 21 are connected to an industrial control computer or a synchronous controller, which can control the two electric actuators 21 to rise and fall synchronously, and drive the lifting plate 22 and the abutments 221 at its bottom to rise and fall.
[0029] Multiple support grooves 3 are evenly distributed on the surface of the workbench 1, positioned directly below different support rods 221. A transverse groove 11 is also horizontally distributed on the surface of the workbench 1. The support grooves 3 are placed within the transverse grooves 11 on the surface of the workbench 1. Both ends of the transverse groove 11 are connected to the side edges. The transverse groove 11 is located at the midpoint between the front and back of the surface of the workbench 1. An air extraction hole 31 and an air inlet 32 are provided on the bottom surface of the support groove 3. An air extraction pipe 311 is connected below the air extraction hole 31, and the air inlet 32 is connected to the bottom of the workbench 1. During use, the air extraction pipe 311 is connected to a negative pressure pump and the negative pressure pump is started. A sufficient amount of plastic cap 4 is scooped out using a container and placed into the transverse groove 11 on the right side. Then, a brush is used to repeatedly move the plastic cap 4 from right to left. During this movement, the plastic cap 4 may be placed in the support groove 3 with its opening facing upwards or downwards. When the opening is downwards (e.g....), the plastic cap 4 is placed in the support groove 3 with its opening facing downwards. Figure 4 External air enters through the air inlet 32 and is then drawn out through the air outlet 31. The diameter of the air inlet 32 is equal to the diameter of the air outlet 31, which balances the speed of air entering and exiting. As a result, the plastic cover 4 has no adsorption effect and will be brushed to the left by the brush again and eventually slide out from the left side of the horizontal groove 11 and fall into the collection basket for collection.
[0030] When the opening faces upwards (e.g.) Figure 5 This will block the air inlet 32 and the air outlet 31, preventing external air from entering. This will create a negative pressure state at the air outlet 31, causing the plastic cover 4 to be firmly adsorbed in the support groove 3. The brush cannot brush the plastic cover 4 away, so it is firmly adsorbed in the support groove 3. This allows the plastic cover 4 to be quickly locked with its opening facing upwards. Then, the rubber plug can be quickly inserted into the plastic cover 4 with its opening facing upwards. The lifting plate 22 and the bottom support rod 221 are used to lower the height and press the rubber plug into the plastic cover 4 to complete the assembly.
[0031] A stop plate 222 is fixed at the bottom end of the stop rod 221. The stop plate 222 is fixed to the end of the stop rod 221 by welding. The area of the stop plate 222 is smaller than the area of the plastic cover 4. When the rubber stopper is pressed down, the larger area of the stop plate 222 can ensure that the rubber stopper can be pressed into the plastic cover 4 accurately and effortlessly.
[0032] In use, place the collection basket of plastic cap 4 at the bottom of the workbench 1 on the lower left side of the transverse groove 11, and place the assembled blood collection tube cap collection basket at the bottom of the workbench 1 on the lower right side of the transverse groove 11. Connect the two electric actuators 21 to the industrial control computer and connect the suction pipe 311 to the negative pressure pump. During assembly, first start the negative pressure pump, use a container to scoop out a sufficient amount of plastic cap 4 and place it into the transverse groove 11 on the right side. Then use a brush to move the plastic cap 4 from right to left multiple times. During the movement, place the plastic cap 4 in the support groove 3 with the opening facing upwards or downwards. When the opening is downwards (e.g., Figure 4After entering through the air inlet 32, external air is drawn out through the air outlet 31. It has no adsorption effect on the plastic cover 4 and will be brushed to the left again by the brush, eventually sliding out from the left side of the transverse groove 11 and falling into the collection basket. When the opening is facing upwards (e.g., ...), Figure 5 This process blocks the air inlet 32 and the air outlet 31, preventing external air from entering and creating a negative pressure at the air outlet 31. This causes the plastic cover 4 to be firmly adhered to the support groove 3, preventing the brush from removing it and ensuring it remains firmly in place. This allows the plastic cover 4 to be quickly locked with its opening facing upwards. A rubber plug is then pre-inserted into each plastic cover 4. The two electric actuators 21 are then controlled to simultaneously lower the lifting plate 22, and the abutment plate 222 at the end of the abutment rod 221 presses the rubber plug into the plastic cover 4, completing the assembly. The electric actuators 21 then raise the lifting plate 22 again, stopping the negative pressure pump and preventing it from adhering to the assembled blood collection tube covers. The brush can then be used again to brush the right side of the transverse groove 11, sweeping the assembled blood collection tube covers into the collection basket on the right. This process can be repeated for blood collection tube cover assembly. The assembled blood collection tube covers can be used after undergoing sterilization again.
Claims
1. A high-efficiency assembled blood collection tube cap device, comprising a workbench (1) and an upper plate (2), characterized in that: The upper plate (2) is supported above the workbench (1) by the support rods (23) at the four corners of its bottom. Electric push rods (21) are vertically installed on both sides of the surface of the upper plate (2). A lifting plate (22) is horizontally fixed at the end of the electric push rod (21) and placed below the upper plate (2). Multiple abutments (221) are vertically and evenly fixed at the bottom of the lifting plate (22). The surface of the workbench (1) is evenly provided with multiple support grooves (3) placed directly below different support rods (221). The bottom surface of the support groove (3) is provided with an air extraction hole (31) and an air inlet hole (32). An air extraction pipe (311) is connected below the air extraction hole (31), and the air inlet hole (32) is connected to the bottom of the workbench (1).
2. The high-efficiency assembled blood collection tube cap device according to claim 1, characterized in that: The surface of the workbench (1) is provided with a transverse groove (11), and the support groove (3) is placed on the surface of the workbench (1) within the transverse groove (11).
3. The high-efficiency assembled blood collection tube cap device according to claim 2, characterized in that: Both ends of the transverse groove (11) are connected to the side, and the transverse groove (11) is located in the middle position of the front and back of the workbench (1) surface.
4. The high-efficiency assembled blood collection tube cap device according to claim 1, characterized in that: The bottom end of the abutment (221) is fixed with abutment plate (222), which is fixed to the end of the abutment (221) by welding.
5. The high-efficiency assembled blood collection tube cap device according to claim 1, characterized in that: The workbench (1) is supported by four legs (12) at the bottom corners, and the legs (12) are all the same height.
6. The high-efficiency assembled blood collection tube cap device according to claim 1, characterized in that: The diameter of the air inlet (32) is equal to the diameter of the air extraction port (31).