A small blood oxygenator

Abstract

The application provides a small blood oxygenator, belonging to the technical field of oxygenators, which comprises a shell, an oxygenator core body arranged in the shell, an upper end cover and a lower end cover respectively arranged on the vertical two sides of the shell, a liquid inlet connector connected to the lower end of one side of the shell, a liquid outlet connector connected to the upper end of the other side of the shell, an air inlet connector connected to the upper end cover, an air outlet connector connected to the lower end cover, and the liquid inlet connector, the liquid outlet connector, the air inlet connector and the air outlet connector are respectively connected with corresponding external channels through a butt joint structure. The application solves the problem that the air inlet, the air outlet, the liquid outlet and the liquid inlet of the existing small oxygenator are mostly connected with the corresponding external pipeline through a wire connection method when in use, and the positions of the air inlet, the air outlet, the liquid outlet and the liquid inlet are mostly connected with each other through a rubber ring to realize the leakage prevention function, the leakage prevention effect is not good, leakage may occur, and the normal use of the oxygenator cannot be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of oxygenator technology, specifically relating to a small blood oxygenator. Background Technology

[0002] Currently, the blood oxygenators used in clinical practice are usually hollow fiber membrane oxygenators, which are typically composed of hollow fiber filaments that are crossed and overlapped to form hollow fiber bundles. When working, oxygen flows inside the fiber membrane, while blood flows outside the fiber membrane. Oxygen molecules diffuse from inside the fiber membrane into the blood to oxygenate the blood, while carbon dioxide molecules in the blood diffuse through the fiber membrane and are carried away.

[0003] Existing technology CN223323839U discloses a small blood oxygenator, including a shell and upper and lower end caps. An oxygenator core is housed inside the shell. An air inlet is located on the upper end cap, and an air outlet is located on the lower end cap, with the inlet and outlet situated on opposite sides of the oxygenator core. A liquid outlet and a liquid inlet are also located on opposite sides of the oxygenator core. A gap exists between the outer periphery of the oxygenator core and the inner ring of the shell, allowing liquid to flow into the gap through the inlet and out through the outlet, with the outlet positioned above the inlet. In use, the air inlet, air outlet, liquid outlet, and liquid inlet of this oxygenator all need to be connected to corresponding external pipelines, mostly using threaded connections. Furthermore, leak-proof measures are often achieved through rubber rings at the connection points, which are ineffective and may lead to leaks, compromising the normal operation of the oxygenator. Summary of the Invention

[0004] This invention provides a small blood oxygenator, which aims to solve the problem that in existing small oxygenators, the air inlet, air outlet, liquid outlet, and liquid inlet are mostly connected to the corresponding external pipelines by threaded connections, and the connection points are mostly equipped with rubber rings to achieve a leak-proof function. However, the leak-proof effect is not good, which may cause leakage and cannot guarantee the normal use of the oxygenator.

[0005] This invention provides a small blood oxygenator, comprising a shell, an oxygenator core installed inside the shell, an upper end cap and a lower end cap installed on each of the vertical sides of the shell, a liquid inlet connector connected to the lower end of one side of the shell, a liquid outlet connector connected to the upper end of the other side of the shell, an air inlet connector connected to the upper end cap, and an air outlet connector connected to the lower end cap, with external channels installed on the other side of the liquid inlet connector, liquid outlet connector, air inlet connector and air outlet connector, and each of the liquid inlet connector, liquid outlet connector, air inlet connector and air outlet connector is connected to the corresponding external channel via a docking structure; The docking structure includes a connecting pipe 2 that connects to the external channel and a connecting pipe 1 that connects to the liquid inlet connector. The connecting pipe 2 is threaded to the connecting pipe 1. The connecting pipe 1 consists of a support pipe and a connecting pipe that is threaded to the connecting pipe 2. The connecting pipe is fixed to the outside of the support pipe. An assembly opening is reserved between the outer surface of the support pipe and the inner surface of the connecting pipe. A leak-proof silicone tube is installed in the assembly port; the leak-proof silicone tube is ring-shaped. A round tube clamped to the outer surface of the support tube; A storage unit installed in a circular tube and capable of injecting air into a leak-proof silicone cylinder. The storage unit is an annular cylinder for storing air, and the annular cylinder is made of TPE material. A storage chamber is reserved between the annular cylinder and the connecting pipe. A compression unit installed on one side of the storage unit compresses the storage unit, causing air to flow toward the leak-proof silicone cylinder. The compression unit includes a compression plate, a linkage rod, and a rotating tube. The compression plate is circular and can be movably installed in the circular tube. The linkage rod is assembled on the compression plate, and a spiral beryllium copper wire is attached to the outer circumference of the linkage rod. The two sides of the spiral beryllium copper wire are connected to the circular tube and the compression plate, respectively. A circular cooperating platform is installed on the inner surface of one side of the rotating tube. A cooperating port that works with the linkage rod is installed on the cooperating platform. Multiple cooperating rods are fixedly connected to the inner surface of the cooperating platform. The storage unit is circular and includes a docking center and a pair of connecting ends. The pair of connecting ends are connected to the circular tube and the support tube, respectively. The docking center is connected to the pressure plate. The inner and outer walls of the docking center are equipped with variable ends, and the two sides of the variable ends are connected to the docking center and the connecting ends, respectively.

[0006] Furthermore, an air injection head is installed on the leak-proof silicone tube, and ring-shaped leak-proof protrusions are installed sequentially from the inside to the outside on one side of the leak-proof silicone tube.

[0007] Furthermore, a through-hole is reserved on the connecting pipe, which is used to connect to the storage unit or to the gas injection head.

[0008] Furthermore, a through groove is reserved on the round tube for movable connection with the linkage rod, and the round tube is installed on the support tube and the connecting tube.

[0009] Furthermore, the support tube has multiple mating ports that are movably connected to the cooperating rod. The mating ports consist of a pair of stop ports for stopping the cooperating rod and a movable port for connecting the stop ports.

[0010] The beneficial effects of this invention are as follows: This invention enhances the leak-proof function of the liquid inlet connector, liquid outlet connector, air inlet connector, and air outlet connector connected to their respective external channels, ensuring the normal use of the oxygenator; Connector tube one and connector tube two are assembled by threaded connection. By rotating the tube, the linkage rod can drive the pressure plate to approach the storage unit. The pressure plate presses the storage unit, causing air to flow into the leak-proof silicone cylinder, which expands and makes tight contact with the leak-proof wall, thus achieving the purpose of leak prevention. This can prevent connector tube one from scratching the leak-proof silicone cylinder during assembly. Air is injected into the leak-proof silicone cylinder through the storage unit, which expands the leak-proof silicone cylinder and makes tight contact with the leak-proof wall, ensuring the leak-proof function. Connector tube two and connector tube one are connected by threaded connection, which is convenient for assembly and does not require the use of other instruments. The storage unit is an annular cylinder. When the annular cylinder is compressed, the air in the annular cylinder will flow into the leak-proof silicone cylinder, causing the leak-proof silicone cylinder to expand. The shape of the changing end is changed by the docking middle end on the changing ring. The changing end reduces the storage chamber space, and the air in the storage chamber will flow into the leak-proof silicone cylinder, causing the leak-proof silicone cylinder to expand. The installed compression unit includes a compression plate, a linkage rod, a spiral beryllium copper wire, and a rotating tube. By changing the compression plate, the storage unit can be compressed to inject air into the leak-proof silicone tube. The docking middle end of the storage unit is assembled on the compression plate. By changing the compression plate, the docking middle end can be driven to change the shape of the changing end, which injects air into the leak-proof silicone tube. Therefore, the compression unit can better match the storage unit and reduce limitations. The installed cooperating port can constrain the linkage rod, and because of the installation of the cooperating port, the rotating tube can rotate around the support tube.

[0011] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the docking structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the disassembled docking structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the connecting pipe structure according to an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the connecting pipe according to an embodiment of the present invention; Figure 6This is a schematic diagram of the storage unit under compression in an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 A magnified structural diagram at point M; Figure 8 This is a schematic diagram of the connecting pipe, elastic gas storage component, compression unit, and circular tube structure according to an embodiment of the present invention; Figure 9 This is an embodiment of the present invention. Figure 9 A magnified structural diagram at point N; Figure 10 This is a schematic cross-sectional view of the storage unit according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the rotating tube structure according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the leak-proof silicone tube structure according to an embodiment of the present invention; Reference numerals: 1. Outer shell; 2. Upper end cover; 3. Lower end cover; 4. Liquid inlet connector; 5. Liquid outlet connector; 6. Air inlet connector; 7. Air outlet connector; 8. External channel; 9. Docking structure; 91. Connecting pipe one; 911. Supporting pipe; 9111. Stop port; 912. Connecting pipe; 9121. Through port; 913. Assembly port; 92. Connecting pipe two; 93. Round pipe; 94. Storage unit; 941. Changing end; 942. Connecting end; 943. Docking middle end; 95. Storage chamber; 96. Compression unit; 961. Compression plate; 962. Linkage rod; 963. Spiral beryllium copper wire; 964. Rotating tube; 9641. Cooperative platform; 9642. Cooperative port; 9643. Cooperative rod; 97. Leak-proof silicone tube; 971. Leak-proof protrusion; 972. Air injection head. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0014] Reference Figures 1-12This invention provides a small blood oxygenator, comprising a shell 1, an oxygenator core housed within the shell 1, an upper end cap 2 and a lower end cap 3 on each of the vertical sides of the shell 1, a liquid inlet connector 4 connected to the lower end of one side of the shell 1, a liquid outlet connector 5 connected to the upper end of the other side of the shell 1, an air inlet connector 6 connected to the upper end cap 2, and an air outlet connector 7 connected to the lower end cap 3, with an external channel 8 installed on the other side of the liquid inlet connector 4, the liquid outlet connector 5, the air inlet connector 6, and the air outlet connector 7, respectively. Each of the liquid inlet connector 4, the liquid outlet connector 5, the air inlet connector 6, and the air outlet connector 7 is connected to the corresponding external channel 8 via a docking structure 9. It should be noted that the shell 1, the oxygenator core, the upper end cap 2, and the lower end cap 3 are all prior art and will not be described in detail here.

[0015] The installation of the docking structure 9 ensures the leak-proof function of the docking positions of the liquid inlet connector 4, liquid outlet connector 5, air inlet connector 6, and air outlet connector 7 with their respective external channels 8, thus ensuring the normal operation of the oxygenator.

[0016] It should also be noted that, since the liquid inlet connector 4, liquid outlet connector 5, air inlet connector 6, and air outlet connector 7 are all connected to the corresponding external channels 8 via interconnected docking structures 9, this embodiment will be described in detail using the example of the liquid inlet connector 4 being connected to the external channels 8 via docking structures 9.

[0017] The docking structure 9 includes a second connecting pipe 92 that connects to the external channel 8 and a first connecting pipe 91 that connects to the liquid inlet connector 4. The second connecting pipe 92 and the first connecting pipe 91 are threaded together. The first connecting pipe 91 is composed of a support pipe 911 and a connecting pipe 912 that is threaded together with the second connecting pipe 92. The connecting pipe 912 is fixed to the outside of the support pipe 911. An assembly port 913 is reserved between the outer surface of the support pipe 911 and the inner surface of the connecting pipe 912. A leak-proof silicone sleeve 97 is installed in the assembly port 913. The leak-proof silicone sleeve 97 is in the shape of a ring. A circular tube 93 is clamped to the outer surface of the support tube 911; A storage unit 94 is installed in the circular tube 93 and can inject air into the leak-proof silicone tube 97. The storage unit 94 is an annular tube for storing air. The annular tube is made of TPE material. A storage chamber 95 is reserved between the annular tube and the connecting tube 912. The compression unit 96 installed on one side of the storage unit 94 compresses the storage unit 94, causing air to flow toward the leak-proof silicone cylinder 97.

[0018] The annular cylinder is fixed to the connecting pipe 912. The venting connector of the annular cylinder can be connected to the through port 9121. However, after the annular cylinder is compressed, the air inside the annular cylinder can flow through the through port 9121 into the leak-proof silicone cylinder 97, causing the leak-proof silicone cylinder 97 to expand.

[0019] At this moment, a barrier ring is attached to the outer surface of the support tube 911. The barrier ring and the support tube 911 are inserted into each other and can be separated. The barrier ring can constrain the rotating tube 964 to prevent the rotating tube 964 from moving out of the support tube 911.

[0020] The pressing unit 96 includes a pressing plate 961, a linkage rod 962, and a rotating tube 964. The pressing plate 961 is in the shape of a ring and is movably installed in the round tube 93. The linkage rod 962 is assembled on the pressing plate 961. A spiral beryllium copper wire 963 is attached to the outer circumference of the linkage rod 962. The two sides of the spiral beryllium copper wire 963 are respectively connected to the round tube 93 and the pressing plate 961. A circular cooperating platform 9641 is installed on the inner surface of one side of the rotating tube 964. A cooperating port 9642 that cooperates with the linkage rod 962 is installed on the cooperating platform 9641. Multiple cooperating rods 9643 are fixedly connected to the inner surface of the cooperating platform 9641.

[0021] Rotating the rotating tube 964 causes the cooperating rod 9643 to move from the stop port 9111 to the movable port, and then presses the rotating tube 964 towards the side connected to the connecting tube 912. At this moment, the cooperating rod 9643 moves from one side of the movable port to the other side, pressing the linkage rod 962 through the rotating tube 964, causing the spiral beryllium copper wire 963 to be in an extended state. The linkage rod 962 drives the pressure plate 961 to approach the storage unit 94. The pressure plate 961 presses the storage unit 94, causing air to move into the leak-proof silicone sleeve 97, which in turn causes the leak-proof silicone sleeve 97 to expand and seal tightly against the leak-proof wall. The rotating tube 964 is rotated to move the cooperating rod 9643 from the movable port to another stop port 9111. The cooperating rod 9643 is stopped by the stop port 9111, which secures the rotating tube 964. This prevents the connecting tube 1 from scratching the leak-proof silicone cylinder 97 during assembly. Air is injected into the leak-proof silicone cylinder 97 through the storage unit 94, causing the leak-proof silicone cylinder 97 to expand and make tight contact with the leak-proof wall to ensure the leak-proof function. The connecting tube 2 92 and the connecting tube 1 91 are connected by a threaded connection, which is convenient for assembly and does not require the use of other instruments. During the movement of the rotating tube 964 back to its initial position, the deformation of the spiral beryllium copper wire 963 drives the linkage rod 962, which in turn drives the pressure plate 961 back to its initial position, freeing the storage unit 94 from pressure. At this moment, the air in the leak-proof silicone tube 97 flows toward the storage unit 94, causing the leak-proof silicone tube 97 to shrink to its initial state, move away from the leak-proof wall, and lose its leak-proof function. Then, the connecting tube 1 91 can be removed from the connecting tube 2 92.

[0022] The reserved cooperation port 9642 can constrain the linkage rod 962. The installation of the cooperation port 9642 allows the rotating tube 964 to successfully rotate around the support tube 911.

[0023] The rotating tube 964 and the support tube 911 can also be connected by a threaded connection. By rotating the rotating tube 964, the rotating tube 964 can be moved, which in turn allows the linkage rod 962 to slide in the through groove.

[0024] The storage unit 94 is circular and includes a docking middle end 943 and a pair of connecting ends 942. The pair of connecting ends 942 are respectively connected to the circular tube 93 and the support tube 911. The docking middle end 943 is connected to the pressure plate 961. The inner and outer walls of the docking middle end 943 are equipped with variable ends 941. The two sides of the variable ends 941 are respectively connected to the docking middle end 943 and the connecting ends 942.

[0025] When the rotating tube 964 is pressed towards the side closer to the connecting tube 912, the pressing plate 961 drives the docking middle end 943 to move towards the storage chamber 95. The moving docking middle end 943 causes the shape of the changing end 941 to change. The changing end 941 reduces the space of the storage chamber 95, and the air in the storage chamber 95 flows into the leak-proof silicone sleeve 97, causing the leak-proof silicone sleeve 97 to expand and make tight contact with the leak-proof wall, thus achieving the leak-proof function. When the rotating tube 964 is pressed towards the side farther from the connecting tube 912, the pressing plate 961 drives the docking middle end 943 to return to the initial position, allowing the storage unit 94 to return to the initial state. At this time, the air in the leak-proof silicone sleeve 97 flows into the storage chamber 95, and the leak-proof silicone sleeve 97 moves away from the leak-proof wall, losing its leak-proof function.

[0026] In order to inject air into the storage chamber 95, an air injection channel can be installed on the external connection end 942. The air injection channel passes through the rotating tube 964, and air can be injected into the storage chamber 95 through the through port 9121 even when the leak-proof silicone sleeve 97 is not installed.

[0027] An air injection head 972 is installed on the leak-proof silicone tube 97. Circular leak-proof protrusions 971 are sequentially installed on one side of the leak-proof silicone tube 97 from the inside out. The leak-proof protrusions 971 and the leak-proof silicone tube 97 form an integral structure. The leak-proof protrusions 971 can be embedded into the gap between the connecting pipe 912 and the connecting pipe 92 and contact the leak-proof wall, thereby enhancing the leak-proof function.

[0028] The connecting pipe 912 has a through port 9121, which is used to connect to the storage unit 94 or the air injection head 972. The through port 9121 allows the storage unit 94 to connect to the storage chamber 95 and the leak-proof silicone tube 97. When the air in the storage unit 94 and the storage chamber 95 does not flow to the leak-proof silicone tube 97, some air is also left in the leak-proof silicone tube 97, so that the leak-proof silicone tube 97 and the interior of the storage unit 94 and the storage chamber 95 maintain the same pressure intensity.

[0029] The circular tube 93 has a through groove that is movably connected to the linkage rod 962. The circular tube 93 is installed on the support tube 911 and the connecting tube 912. The through groove is used to assemble the linkage rod 962. The circular tube 93 supports the linkage rod 962. The cross section of the circular tube 93 is bent. The assembly area formed between the circular tube 93, the support tube 911 and the connecting tube 912 is used to assemble the storage unit 94 and also gives the pressure plate 961 a range of motion.

[0030] The support tube 911 has multiple mating ports that can be movably connected to the cooperating rod 9643. The mating ports consist of a pair of stop ports 9111 used to stop the cooperating rod 9643 and a movable port used to connect the stop ports 9111. The movable port allows the rotating tube 964 to move along the support tube 911; the stop ports 9111 can stop the cooperating rod 9643 and tighten the rotating tube 964.

[0031] After assembling the connecting tube 91 to the end of the connecting tube 92, rotate the rotating tube 964 to allow the cooperating rod 9643 to move from the stop port 9111 into the movable port. Then, press the rotating tube 964 towards the side approaching the connecting tube 912. At this moment, the cooperating rod 9643 moves from one side of the movable port to the other side, pressing the linkage rod 962 through the rotating tube 964. This keeps the spiral beryllium copper wire 963 in an extended state. The linkage rod 962 drives the pressing plate 961 to approach the storage sheet. The storage unit 94 is compressed by the pressure plate 961, allowing air to flow into the leak-proof silicone cylinder 97. Finally, the leak-proof silicone cylinder 97 expands and makes tight contact with the leak-proof wall, achieving the purpose of preventing leakage. Then, the rotating tube 964 is rotated to move the cooperating rod 9643 from the movable port to another stop port 9111. The cooperating rod 9643 is tightened through the stop port 9111, achieving the tightening of the rotating tube 964, thereby achieving the leak prevention between the connecting pipe 2 92 and the connecting pipe 1 91. When disassembly is to be performed, during the process of moving the rotating tube 964 back to its initial position, the deformation of the spiral beryllium copper wire 963 pulls the linkage rod 962. The linkage rod 962 drives the pressure plate 961 back to its initial position, preventing the storage unit 94 from being compressed. At this moment, the air in the leak-proof silicone tube 97 flows towards the storage unit 94, the leak-proof silicone tube 97 shrinks and returns to its initial state, moves away from the leak-proof wall, and loses its leak-proof function. Then the connecting tube 1 91 and connecting tube 2 92 can be separated.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A small blood oxygenator, comprising a shell, an oxygenator core disposed within the shell, and an upper end cap and a lower end cap disposed on each of the vertical sides of the shell, characterized in that, The lower end of one side of the outer casing is connected to the liquid inlet connector, the upper end of the other side of the outer casing is connected to the liquid outlet connector, the upper end cover is connected to the air inlet connector, and the lower end cover is connected to the air outlet connector. External channels are installed on the other side of the liquid inlet connector, liquid outlet connector, air inlet connector, and air outlet connector. Each of the liquid inlet connector, liquid outlet connector, air inlet connector, and air outlet connector is connected to the corresponding external channel via a docking structure. The docking structure includes a connecting pipe 2 that connects to the external channel and a connecting pipe 1 that connects to the liquid inlet connector. The connecting pipe 2 is threaded to the connecting pipe 1. The connecting pipe 1 consists of a support pipe and a connecting pipe that is threaded to the connecting pipe 2. The connecting pipe is fixed to the outside of the support pipe. An assembly opening is reserved between the outer surface of the support pipe and the inner surface of the connecting pipe. A leak-proof silicone tube is installed in the assembly port; the leak-proof silicone tube is ring-shaped. A round tube clamped to the outer surface of the support tube; A storage unit installed in a circular tube and capable of injecting air into a leak-proof silicone cylinder. The storage unit is an annular cylinder for storing air, and the annular cylinder is made of TPE material. A storage chamber is reserved between the annular cylinder and the connecting pipe. A compression unit installed on one side of the storage unit compresses the storage unit, causing air to flow toward the leak-proof silicone cylinder. The compression unit includes a compression plate, a linkage rod, and a rotating tube. The compression plate is circular and can be movably installed in the circular tube. The linkage rod is assembled on the compression plate, and a spiral beryllium copper wire is attached to the outer circumference of the linkage rod. The two sides of the spiral beryllium copper wire are connected to the circular tube and the compression plate, respectively. A circular cooperating platform is installed on the inner surface of one side of the rotating tube. A cooperating port that works with the linkage rod is installed on the cooperating platform. Multiple cooperating rods are fixedly connected to the inner surface of the cooperating platform. The storage unit is circular and includes a docking center and a pair of connecting ends. The pair of connecting ends are connected to the circular tube and the support tube, respectively. The docking center is connected to the pressure plate. The inner and outer walls of the docking center are equipped with variable ends, and the two sides of the variable ends are connected to the docking center and the connecting ends, respectively.

2. A miniature blood oxygenator according to claim 1, characterized in that: An air injection head is installed on the leak-proof silicone tube, and ring-shaped leak-proof protrusions are installed sequentially from the inside to the outside on one side of the leak-proof silicone tube.

3. A miniature blood oxygenator according to claim 2, characterized in that: The connecting pipe has a pre-drilled through-hole, which is used to connect to the storage unit or the gas injection head.

4. A miniature blood oxygenator according to claim 1, characterized in that: The round tube has a pre-drilled groove for movable connection with the linkage rod, and the round tube is installed on the support tube and the connecting tube.

5. A miniature blood oxygenator according to claim 1, characterized in that: The support tube has multiple pre-drilled ports that can be movably connected to the collaborating rod. The collaborating ports consist of a pair of stop ports for stopping the collaborating rod and a movable port for connecting the stop ports.

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