Test tube clamping device

Abstract

The utility model relates to the field of biomedical treatment, in particular to a test tube clamping device which comprises a rack, a guide mechanism, a movable frame, a buffer mechanism and a clamp, the guide mechanism is arranged on the rack, the movable frame is used for placing a test tube and arranged on the guide mechanism, the guide mechanism guides the movable frame to move up and down, and the buffer mechanism is arranged on the clamp. The buffer mechanism is arranged between the rack and the movable frame, the buffer mechanism is arranged on the movable frame and / or the rack, the buffer mechanism is used for buffering the vertical movement of the movable frame, the clamp is arranged on the movable frame, and the clamp is used for clamping a test tube placed on the movable frame. The test tube enters the test tube clamping device, the test tube applies downward pressure to the movable frame, and the buffer mechanism performs buffer protection on the movable frame under the guidance of the guide mechanism, so that the risk that the test tube is broken or exploded in the grabbing and moving process due to misoperation or improper operation is effectively prevented and avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of biological medical treatment, especially a test tube clamping device. BACKGROUND

[0002] In the pretreatment process of microbial samples, we often face the dual challenges of high biological hazard risk and low processing efficiency. This link plays a crucial role in the entire instrument workflow, especially the opening and closing of the sample tube. Therefore, how to effectively improve the success rate of opening and closing, and how to prevent microbial sample tube rupture from causing sample overflow, become technical difficulties in the product design and improvement process.

[0003] Currently, most of the related products on the market use self-designed clamping mechanical structures to solve this problem. However, the reliability of these structures is not satisfactory. If the test tube is placed with relatively soft materials, or in a position below the halfway point in the program design, it may result in the test tube not being correctly positioned. In this case, the test tube may tilt or slide, affecting subsequent experimental operations and the accuracy of the results. In addition, if the test tube is placed with excessive force, it may cause excessive pressure on the bottom of the test tube, leading to test tube rupture and biological contamination. This not only pollutes the experimental environment, but also poses a threat to the health of the operator. SUMMARY

[0004] The technical problem to be solved by the utility model is to solve one or more technical problems existing in the prior art and provide at least one beneficial option or create conditions.

[0005] The solution to the technical problem of the utility model is a test tube clamping device, which includes a rack, a guide mechanism, a movable frame, a buffer mechanism, and a clamp. The guide mechanism is arranged on the rack. The movable frame is used to place test tubes. The movable frame is arranged on the guide mechanism. The guide mechanism guides the up-and-down movement of the movable frame. The buffer mechanism is arranged between the rack and the movable frame. The buffer mechanism is arranged on the movable frame and / or the rack. The buffer mechanism is used to buffer the up-and-down movement of the movable frame. The clamp is arranged on the movable frame. The clamp is used to clamp the test tubes placed on the movable frame.

[0006] The utility model has the beneficial effect that the test tube enters the test tube clamping device, the test tube exerts downward pressure on the movable frame, and under the guidance of the guide mechanism, the buffer mechanism buffers and protects the movable frame, effectively preventing and avoiding the risk of test tube rupture or pressure explosion during the grabbing and moving process due to operational errors or improper operation.

[0007] In summary, the utility model relates to a test tube clamping device, clever design can effectively prevent and avoid the risk of test tube rupture or pressure burst due to the mistake or improper operation procedure. The device is small in size, compact design, suitable for various scenes of fixing test tube in laboratory environment. Its simple and clear structure design not only facilitates user operation, but also ensures the high reliability of the equipment, thereby greatly prolonging the service life. In addition, the test tube clamping device adopts a highly device structure, if any component wears or damages during daily use, the user can easily replace or repair, thereby reducing the maintenance cost and improving the maintenance efficiency.

[0008] As a further improvement of the above technical solution, the guide mechanism includes a sliding block and a guide rail, the guide rail is arranged inside the rack in the vertical direction, one side of the sliding block is connected with the guide rail, and the movable frame is fixedly connected to the other side of the sliding block.

[0009] As a further improvement of the above technical solution, the guide rail is arranged inside the rack and arranged in the vertical direction. One side of the sliding block is connected with the guide rail, which ensures that the sliding block can move smoothly on the guide rail. The movable frame is fixedly connected to the other side of the sliding block, so that the movable frame can be adjusted in position accordingly with the movement of the sliding block. According to the size of the test tube, we can also replace the movable frame. The flexibility of this design makes the equipment adapt to test tubes of different sizes, greatly improving the scope of application and practicality of the equipment. Users can choose different sizes of movable frame according to actual needs, so as to meet various experimental needs.

[0010] As a further improvement of the above technical solution, the movable frame includes a frame body and a test tube limiting block, the frame body is provided with a first opening at the top for inserting a test tube, and the test tube limiting block is provided with a second opening, the first opening and the second opening are concentrically arranged, and the test tube limiting block is detachably fixed on the frame body.

[0011] As a further improvement of the above technical solution, the test tube limiting block precisely positions and limits the test tube inserted into the first opening, effectively preventing the test tube from tilting or sliding during use, ensuring the stability and accuracy of the experiment. In addition, users can choose test tubes of different sizes as needed and replace the limiting block with appropriate size openings accordingly. This design makes the clamping device flexible to adapt to test tubes of various sizes, thereby improving the versatility and scope of application of the equipment. In addition, this design simplifies the operation process, so that users do not need to make complex adjustments or replace the entire clamping device when replacing the test tube, greatly improving the experimental efficiency and user experience.

[0012] As a further improvement of the above technical solution, the movable rack further comprises a test tube support arranged below the first opening for supporting the bottom of the test tube.

[0013] As a further improvement of the above technical solution, the mounting bracket provides a stable support point for the test tube, ensuring that the bottom of the test tube can be effectively supported, thereby maintaining the stability and safety of the test tube during the experiment. The fixation of the test tube is more stable, reducing the risk of displacement or tipping of the test tube due to vibration or inclination during the experiment, thereby improving the accuracy and reliability of the experiment. The bottom of the test tube is better protected, avoiding possible wear or damage to the bottom of the test tube due to direct contact with a hard surface, prolonging the service life of the test tube.

[0014] As a further improvement of the above technical solution, the movable rack further comprises a light coupling device and a light coupling mounting plate, the light coupling mounting plate being fixed inside the frame, and the light coupling device being mounted on the light coupling mounting plate, the light coupling device being used to detect whether the test tube is correctly placed on the test tube support.

[0015] As a further improvement of the above technical solution, the main function of the light coupling device is to detect whether the test tube has been correctly inserted into the mounting bracket. When the test tube is inserted, the light coupling device can detect the presence of the test tube through its internal optical sensor and convert this information into an electrical signal, thereby achieving real-time monitoring of the test tube insertion status. This function is crucial for ensuring the accuracy and repeatability of the experiment, as it can prevent experimental data errors or equipment damage due to incorrect insertion of the test tube. It improves the automation level of the entire device, reducing the need for manual intervention and thereby reducing the likelihood of operational errors.

[0016] As a further improvement of the above technical solution, the buffer mechanism comprises a plurality of plug screws and a plurality of springs, the plug screws corresponding one-to-one with the springs, the bottom of the frame being fixed to the rack through the plug screws, the springs being sleeved on the plug screws, one end of the springs being connected to the frame, and the other end of the springs being connected to the rack.

[0017] As a further improvement of the above technical solution, the bottom of the frame is fixedly connected with the rack through the plug screws, thereby realizing the stable combination between the frame and the rack. Each spring is sleeved on the corresponding plug screw, forming a unique buffer structure to reduce damage caused by vibration or impact. The spring can produce appropriate elastic deformation when subjected to external force, thereby playing a buffering and shock-absorbing role. Not only can effectively absorb and disperse external force, but also can ensure the stable connection between the frame and the rack, thereby improving the stability and reliability of the whole device.

[0018] As a further improvement of the above technical solution, the clamp comprises a driving device and two clamping jaws, the two clamping jaws are arranged in parallel, the clamping jaws are in sliding connection with the driving device, and the two clamping jaws are driven by the driving device to move away from or close to each other for clamping the test tube.

[0019] As a further improvement of the above technical solution, through the parallel arrangement of the two clamping jaws, the test tube can be clamped more stably, avoiding the sliding or tilting of the test tube during clamping, thereby improving the reliability and safety of clamping. Secondly, the sliding connection design of the clamping jaw and the driving device makes the clamping jaw more flexible during movement, which can adapt to test tubes of different sizes and shapes, improving the application range and flexibility of the clamp.

[0020] As a further improvement of the above technical solution, the clamping jaw is provided with a corresponding anti-slip silica gel block, the anti-slip silica gel block is symmetrically arranged, and an arc-shaped slot in the vertical direction is formed on the anti-slip silica gel block for preventing the test tube from sliding during cap rotation.

[0021] As a further improvement of the above technical solution, the arrangement of the anti-slip silica gel block significantly enhances the friction between the clamping jaw and the test tube, thereby providing more stable support when grabbing and rotating the test tube, and reducing the potential damage risk caused by test tube sliding. The use of silica gel material also has a certain elasticity, which can absorb part of the vibration and impact, further protecting the test tube from damage.

[0022] As a further improvement of the above technical solution, a plurality of positioning holes are arranged on the rack, all the positioning holes penetrate the thickness of the rack, and the positioning holes are used for mounting and positioning the rack on a plane.

[0023] As a further improvement of the above technical solution, through the use of positioning holes, the position accuracy of the rack during installation can be ensured, thereby improving the installation efficiency and use performance of the whole device. Secondly, the design of the positioning hole simplifies the installation process, making the installation work more convenient, even non-professionals can easily complete the installation task. In addition, the existence of the positioning hole also enhances the connection strength between the rack and the plane, improves the stability and durability of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] In the attached diagram: 1-frame, 2-guide mechanism, 3-movable frame, 4-buffer mechanism, 5-clamp, 6-sliding block, 7-guide rail, 8-frame, 9-test tube limiting block, 10-first opening, 11-second opening, 12-test tube support, 13-optical coupler device, 14-optical coupler mounting plate, 15-positioning hole, 16-plug screw, 17-spring, 18-drive device, 19-gripper, 20-anti-slip silicone block. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0027] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0028] In the pretreatment of microbial samples, we often face the dual challenges of high biohazard risk and low processing efficiency. This step plays a crucial role in the entire instrument workflow, especially the opening and closing of the sample tube caps. Therefore, how to effectively improve the success rate of cap opening and closing, and how to prevent microbial sample tube breakage leading to sample spillage, have become technical challenges in the design and improvement of this product.

[0029] At present, the related products on the market mostly use self-designed clamping mechanical structures to solve this problem. However, the reliability of these structures is not satisfactory. If the placement of the test tube uses a softer material, or the program design places the test tube in a position below the half-space, it may cause the test tube to fail to be correctly positioned. In this case, the test tube may tilt or slide, thereby affecting the subsequent experimental operation and the accuracy of the results. In addition, if the test tube is placed with excessive force, the bottom of the test tube may bear excessive pressure, causing the test tube to break and causing biological contamination. This not only pollutes the experimental environment, but also poses a threat to the health of the operator.

[0030] Therefore, a test tube clamping device, with reference to Figure 1 which comprises a rack 1, a guide mechanism 2, a movable frame 3, a buffer mechanism 4 and a clamp 5, the guide mechanism 2 is arranged on the rack 1, the movable frame 3 is used for placing a test tube, the movable frame 3 is arranged on the guide mechanism 2, the guide mechanism 2 guides the movable frame 3 to move up and down, the buffer mechanism 4 is arranged between the rack 1 and the movable frame 3, the buffer mechanism 4 is arranged on the movable frame 3 and / or the rack 1, the buffer mechanism 4 is used for buffering the up and down movement of the movable frame 3, and the clamp 5 is arranged on the movable frame 3, the clamp 5 is used for clamping the test tube placed on the movable frame 3.

[0031] When the test tube enters the test tube clamping device, the test tube exerts a downward pressure on the movable frame 3, and under the guidance of the guide mechanism 2, the buffer mechanism 4 buffers and protects the movable frame 3, effectively preventing and avoiding the risk of test tube breakage or pressure explosion during the grabbing and moving process due to operation errors or improper operation.

[0032] In summary, the test tube clamping device of the present application has the advantages of clever design, effective prevention and avoidance of the risk of test tube breakage or pressure explosion due to operation errors or improper operation, small size, compact design, and suitability for various scenarios of test tube fixation in laboratory environments. The structure design is simple and clear, which not only facilitates user operation and use, but also ensures high reliability of the equipment, thereby greatly prolonging the service life. In addition, the test tube clamping device adopts a highly device-based structure, so that if any component is worn or damaged during daily use, the user can easily replace or repair it, thereby reducing maintenance costs and improving maintenance efficiency.

[0033] The movable frame 3 can be tilted during the experiment. Therefore, in an embodiment, the guide mechanism 2 comprises a sliding block 6 and a guide rail 7, the guide rail 7 is arranged inside the frame 1 in the vertical direction, one side of the sliding block 6 is in sliding connection with the guide rail 7, and the other side of the sliding block 6 is fixedly connected with the movable frame 3. The guide rail 7 is arranged inside the frame 1 and arranged in the vertical direction. One side of the sliding block 6 is in sliding connection with the guide rail 7, which ensures that the sliding block 6 can move smoothly on the guide rail 7. The movable frame 3 is fixedly connected to the other side of the sliding block 6, so that the movable frame 3 can be adjusted in position accordingly with the movement of the sliding block 6. According to the size of the test tube, we can also replace the movable frame 3. The flexibility of this design makes the device adapt to test tubes of different sizes, greatly improving the scope of application and practicality of the device. Users can choose different sizes of movable frame 3 according to actual needs, so as to meet various experimental needs.

[0034] The test tube can be tilted or slipped during use. Therefore, in an embodiment, the movable frame 3 comprises a frame 8 and a test tube limiting block 9, the frame 8 is provided with a first opening 10 at the top for inserting a test tube, the test tube limiting block 9 is provided with a second opening 11, the first opening 10 and the second opening 11 are arranged concentrically, and the test tube inserted into the first opening 10 is limited, preventing the test tube from tilting, and the test tube limiting block 9 is detachably fixed on the frame 8. The test tube limiting block 9 precisely positions and limits the test tube inserted into the first opening 10, effectively preventing the test tube from tilting or slipping during use, ensuring the stability and accuracy of the experiment. In addition, users can choose test tubes of different sizes according to their needs, and replace the limiting block with appropriate size openings accordingly. This design makes the clamping device flexible to adapt to test tubes of various sizes, thereby improving the versatility and scope of application of the device. In addition, this design simplifies the operation process, so that users do not need to make complex adjustments or replace the entire clamping device when replacing the test tube, greatly improving the experimental efficiency and user experience.

[0035] If the test tube is placed with too much force, it can cause the bottom of the test tube to bear too much force, leading to test tube rupture and biological contamination. Therefore, in an embodiment, the movable rack 3 further comprises a test tube support 12 arranged below the first opening 10 for supporting the bottom of the test tube. The mounting support provides a stable support point for the test tube, ensuring that the bottom of the test tube is effectively supported, thereby maintaining the stability and safety of the test tube during the experiment. This makes the fixation of the test tube more stable, reducing the risk of displacement or tipping of the test tube during the experiment due to vibration or tilting, thereby improving the accuracy and reliability of the experiment. The bottom of the test tube is better protected, avoiding possible wear or damage to the bottom of the test tube due to direct contact with a hard surface, prolonging the service life of the test tube.

[0036] During use, it is necessary to ensure that the test tube is correctly inserted into the test tube clamping device before clamping. Therefore, in an embodiment, the movable rack 3 further comprises a light coupling device 13 and a light coupling mounting plate 14, the light coupling mounting plate 14 being fixed inside the frame 8, and the light coupling device 13 being mounted on the light coupling mounting plate 14, the light coupling device 13 being used to detect whether the test tube is correctly placed on the test tube support 12. The main function of the light coupling device 13 is to detect whether the test tube has been correctly inserted into the mounting support. When the test tube is inserted, the light coupling device 13 can detect the presence of the test tube through its internal optical sensor and convert this information into an electrical signal, thereby achieving real-time monitoring of the insertion state of the test tube. This function is crucial for ensuring the accuracy and repeatability of the experiment, as it can prevent experimental data errors or equipment damage due to incorrect insertion of the test tube. It improves the automation level of the entire device, reducing the need for manual intervention and thereby reducing the likelihood of human error.

[0037] When the test tube is placed in the test tube clamping device, a downward pressure will be generated. Therefore, in an embodiment, the buffer mechanism 4 comprises a plurality of jam screws 16 and a plurality of springs 17, the jam screws 16 correspond to the springs 17 one by one, the bottom of the frame 8 is fixed with the rack 1 through the jam screws 16, and the springs 17 are sleeved on the jam screws 16, one end of the spring 17 is connected with the frame 8, and the other end of the spring 17 is connected with the rack 1. The bottom of the frame 8 is fixedly connected with the rack 1 through the jam screws 16, so that the stable combination between the frame 8 and the rack 1 is realized. Each spring 17 is sleeved on the corresponding jam screw 16, forming a unique buffer structure to reduce damage caused by vibration or impact. The spring 17 can produce appropriate elastic deformation when subjected to external force, thereby playing a buffering and shock-absorbing role. Not only can effectively absorb and disperse external force, but also can ensure the stable connection between the frame 8 and the rack 1, thereby improving the stability and reliability of the whole equipment.

[0038] In order to ensure the safety and stability of the test tube, prevent the test tube from slipping, breaking or other accidents during operation. Therefore, in an embodiment, the clamp 5 comprises a driving device 18 and two clamping jaws 19, the two clamping jaws 19 are arranged in parallel, the clamping jaws 19 are slidably connected with the driving device 18, and the two clamping jaws 19 are driven by the driving device 18 to move away from or close to each other for clamping the test tube. Through the parallel arrangement of the two clamping jaws 19, the test tube can be clamped more stably, avoiding the test tube from slipping or tilting during clamping, thereby improving the reliability and safety of clamping. Secondly, the sliding connection design of the clamping jaw 19 and the driving device 18 makes the clamping jaw 19 more flexible during movement, which can adapt to test tubes of different sizes and shapes, improving the application range and flexibility of the clamp 5.

[0039] During the operation of the test tube, especially when the hands are wet or there is liquid on the surface of the test tube, the test tube is easy to slip, which not only affects the operation efficiency, but also may cause the test tube to break or the liquid to splash. Therefore, in an embodiment, the clamping jaw 19 is provided with anti-slip silica gel blocks 20 one by one, the anti-slip silica gel blocks 20 are symmetrically arranged, and arc-shaped grooves in the vertical direction are formed on the anti-slip silica gel blocks 20 for preventing the test tube from slipping during cap rotation. The arrangement of the anti-slip silica gel blocks 20 significantly enhances the friction between the clamping jaw 19 and the test tube, thereby providing more stable support when grabbing and rotating the test tube, and reducing the potential damage risk caused by test tube slipping. The use of silica gel material also has a certain elasticity, which can absorb part of the vibration and impact, further protecting the test tube from damage.

[0040] In addition, it is worth noting that a pressure sensor can be installed at the clamping site to monitor the size and changes of the clamping force in real time, so as to realize accurate control and adjustment of the clamping force. Specifically, the pressure sensor can be installed on the surface of the arc-shaped groove inside the anti-slip silica gel block 20. Through the connection with the controller, the clamping force data can be collected in real time, and adjusted according to the actual needs. When the clamping force is detected to be insufficient, the clamping force can be increased by increasing the output torque of the driving device 18 or adjusting the controller parameters; on the contrary, when the clamping force is too large, the clamping force can be reduced by reducing the output torque of the driving device 18 or adjusting the controller parameters. In this way, accurate control and adjustment of the clamping force can be realized, thereby improving the clamping effect and the stability of the system.

[0041] In the experiment process, the test tube clamping device needs to be set stably to ensure the accuracy of the experiment. Therefore, in an embodiment, a plurality of positioning holes 15 are arranged on the rack 1, all the positioning holes 15 penetrate the thickness of the rack 1, and the positioning holes 15 are used to install and position the rack 1 on a plane. Through the use of the positioning holes 15, the position accuracy of the rack 1 during installation can be ensured, thereby improving the installation efficiency and use performance of the entire device. Secondly, the design of the positioning holes 15 simplifies the installation process, so that the installation work is more convenient, and even non-professionals can easily complete the installation task. In addition, the existence of the positioning holes 15 also enhances the connection strength between the rack 1 and the plane, improves the stability and durability of the device.

[0042] The preferred embodiments of the utility model are described above, but the utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A test tube clamping device comprising a frame (1), characterized in that, The test tube clamping device further comprises: a guide mechanism (2) arranged on the rack (1); a movable frame (3) for placing test tubes, the movable frame (3) being arranged on the guide mechanism (2), the guide mechanism (2) guiding the movable frame (3) to move up and down; a buffer mechanism (4) arranged between the rack (1) and the movable frame (3), the buffer mechanism (4) being arranged on the movable frame (3) and / or the rack (1), the buffer mechanism (4) being used for buffering the up and down movement of the movable frame (3); a clamp (5) arranged on the movable frame (3), the clamp (5) being used for clamping the test tubes placed on the movable frame (3).

2. A test tube clamping device according to claim 1, characterized in that The guide mechanism (2) comprises a sliding block (6) and a guide rail (7), the guide rail (7) being arranged on the inner side of the rack (1) in the vertical direction, one side of the sliding block (6) being in sliding connection with the guide rail (7), and the other side of the sliding block (6) being fixedly connected with the movable frame (3).

3. A test tube clamping device according to claim 1, wherein The movable frame (3) comprises a frame body (8) and a test tube limiting block (9), the frame body (8) being provided with a first opening (10) at the top for inserting test tubes, the test tube limiting block (9) being provided with a second opening (11), the first opening (10) and the second opening (11) being concentrically arranged, the test tube limiting block (9) being detachably fixed on the frame body (8).

4. A test tube clamping device according to claim 3, wherein The movable frame (3) further comprises a test tube support (12) arranged below the first opening (10) for supporting the bottom of the test tube.

5. A test tube clamping device according to claim 4, wherein The movable frame (3) further comprises a light coupling device (13) and a light coupling mounting plate (14), the light coupling mounting plate (14) being fixed inside the frame body (8), the light coupling device (13) being mounted on the light coupling mounting plate (14), the light coupling device (13) being used for detecting whether the test tube is correctly placed on the test tube support (12).

6. A test tube clamping device according to claim 3, wherein The buffer mechanism (4) comprises a plurality of plug screws (16) and a plurality of springs (17), the plug screws (16) corresponding to the springs (17) one by one, the bottom of the frame body (8) being fixed with the rack (1) through the plug screws (16), the springs (17) being sleeved on the plug screws (16), one end of the springs (17) being connected with the frame body (8), and the other end of the springs (17) being connected with the rack (1).

7. The test tube clamping device of claim 1, wherein The clamp (5) comprises a driving device (18) and two clamping jaws (19), the two clamping jaws (19) being arranged in parallel, the clamping jaws (19) being in sliding connection with the driving device (18), the two clamping jaws (19) being driven by the driving device (18) to move away from or close to each other, and being used for clamping the test tubes.

8. A test tube clamping device according to claim 7, characterized in that A corresponding anti-skid silica gel block (20) is arranged on the clamp jaw (19), the anti-skid silica gel block (20) is symmetrically arranged, and an arc-shaped slot in the vertical direction is arranged on the anti-skid silica gel block (20) to prevent the test tube from sliding when the cap is rotated.

9. The test tube clamping device of claim 1, wherein A plurality of positioning holes (15) are arranged on the rack (1), all the positioning holes (15) penetrate the thickness of the rack (1), and the positioning holes (15) are used for mounting and positioning the rack (1) on a plane.

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