Cage changing platform

Abstract

A cage replacing table comprises an air supply cover body, a cage replacing table body and a cage replacing table body, the main body is located below the air supply cover body, the top surface of the main body is provided with a cage placing area, the cage placing area is provided with an air return hole, and the mounting hole is opposite to the air return hole; the air pipe is located between the air supply cover body and the main body and connected with the air supply cover body and the main body, and the air supply cover body, the air pipe and the main body form an air supply duct; and the fan, the flow equalizing film and the filtering piece are all arranged in the air supply duct. Disordered airflow in the air supply duct forms laminar flow air after passing through the flow equalizing film, and the laminar flow air is blown out through the mounting hole, flows from top to bottom between the mounting hole and the cage placement area, and then returns to the air passing duct through the air return hole under negative pressure suction of the air return hole; according to the scheme, the stability of laminar flow protection formed by laminar flow air between the mounting holes and the cage containing areas is better, tiny pollutants such as dust can be better prevented from escaping in the cage replacing process, and under the same laminar flow protection performance, the cage replacing table is smaller in size and more convenient to move and use.

Description

Technical Field

[0001] This utility model relates to the technical field of laboratory animal cage changing workbench, and more specifically, to a cage changing workbench. Background Technology

[0002] Laboratory animals have long played an irreplaceable role in traditional biological fields such as life sciences, medicine, and pharmacy, driving continuous breakthroughs in life sciences. High-quality laboratory animals are crucial for obtaining accurate and stable experimental data. However, during cage changes, the need to open the cages exposes the animals to direct contact, posing a significant risk of cross-contamination. This exposure also spreads contaminants such as animal excrement, hair, and bedding dust to the rearing environment and the personnel handling the cage changes. Therefore, providing dual safety and cleanliness protection for animals, personnel, and the environment during cage changes is of paramount importance.

[0003] As biosafety issues gained increasing attention, cage changing stations emerged as specialized equipment. Around the 1950s, cage changing stations were designed with only simple protective structures, such as simple isolation hoods in the changing area or rudimentary air filtration devices to reduce the spread of contaminants like animal hair and dander. From the 1980s to the 21st century, the rapid development of life science research and the wider application of laboratory animals led to more specialized design and manufacturing of cage changing stations. Cage changing workstations based on laminar flow principles emerged, ensuring a certain level of cleanliness during operations. In recent years, cage changing workstations have continued to evolve towards higher standards of cleanliness control, operational efficiency, and animal welfare, with automation and intelligentization becoming new trends.

[0004] The current mainstream cage changing platform includes a main body, an air supply cover, and connectors. The air supply cover is located on top of the main body, and the connectors connect the air supply cover and the main body on the left and right sides. The bottom surface of the air supply cover has mounting holes, and the top surface of the main body has a cage placement area and a return air vent. The return air vent is arranged in a ring-shaped mesh structure along the circumference of the cage placement area. The mounting holes are opposite to the top surface of the main body. To ensure the laminar flow effect of the airflow formed between the mounting holes and the return air vent (the velocity of the laminar airflow should not be less than 0.36 m / s, which generally requires two fans), this type of cage changing platform is large and heavy, making it very difficult to move and relocate. In the context of generally limited laboratory space, a large cage changing platform occupies too much valuable space, affecting the laboratory layout and the placement of other experimental equipment, limiting the effective use of laboratory space. Therefore, most cage changing platforms are basically idle and not effectively used. Utility Model Content

[0005] This utility model embodiment provides a cage changing platform, including: an air supply cover with a mounting hole; a main body located below the air supply cover, the top surface of the main body having a cage placement area with a return air hole, the mounting hole being opposite to the return air hole; an air duct located between the air supply cover and the main body and connecting the air supply cover and the main body, the air supply cover, the air duct, and the main body forming an air supply duct, the inlet of the air supply duct being the return air hole, and the outlet of the air supply duct being the mounting hole; a fan, a flow equalization membrane, and a filter element, all disposed in the air supply duct.

[0006] In some exemplary embodiments, the flow equalization membrane is disposed at the mounting hole, and the fan and the filter are disposed within the main body.

[0007] In some exemplary embodiments, the filter element includes a primary filter element and a secondary filter element. The interior of the main body has a first sub-air duct and a second sub-air duct. The second sub-air duct is located on the upper rear side of the first sub-air duct and is connected to the air duct. The secondary filter element is disposed in the second sub-air duct. The first sub-air duct is connected to the return air hole. The primary filter element is disposed in the first sub-air duct and is opposite to the return air hole. The fan connects the first sub-air duct and the second sub-air duct. The air supply duct includes the first sub-air duct and the second sub-air duct.

[0008] In some exemplary embodiments, the return air holes are a plurality of first through holes arranged in a matrix, and the plurality of first through holes fill the cage placement area.

[0009] In some exemplary embodiments, the diameter of each first through hole is set to 4mm to 8mm, the hole spacing between adjacent first through holes is 10mm to 20mm, the size of the cage placement area in the left-right direction is 710mm to 770mm, and the size of the cage placement area in the front-back direction is 530mm to 590mm.

[0010] In some exemplary embodiments, the top surface of the main body also has an installation area located behind the cage placement area, the lower end of the air duct is fixed to the installation area, and the upper end of the air duct is fixedly connected to the rear part of the air supply cover.

[0011] In some exemplary embodiments, the front side of the air duct is provided with a human-machine interaction module and a storage component, the storage component is located below the human-machine interaction module, the air supply cover is provided with a light source module and a camera module, the main body is provided with a control module and a power module, and the human-machine interaction module, the light source module, the camera module and the power module are all electrically connected to the control module.

[0012] In some exemplary embodiments, the lower front part of the main body is provided with a rearwardly recessed leg receiving area, and the bottom surface of the air supply cover is an inclined surface that extends upward from back to front.

[0013] In some exemplary embodiments, the front end of the air supply cover is located behind the front end of the cage placement area. The distance between the front end of the air supply cover and the front end of the cage placement area in the front-back direction is 360mm~420mm, the distance between the top surface of the air supply cover and the cage placement area in the vertical direction is 820mm~880mm, and the distance between the bottom surface of the air supply cover and the cage placement area in the vertical direction is 570mm~630mm.

[0014] In some exemplary embodiments, the left and right ends of the cage placement area are provided with handles that can be pushed and pulled up and down, and each handle is arranged in the front-back direction.

[0015] In some exemplary embodiments, the cage changing platform further includes: a chassis located below the main body and having rollers on its bottom surface; and a lifting mechanism connecting the main body and the chassis.

[0016] In some exemplary embodiments, the main body includes a frameless shell with an outer surface roughness of no more than 1.0 μm, and the cage placement area is located on the top surface of the top plate of the frameless shell.

[0017] The technical solution provided by this utility model embodiment involves a flow equalization membrane and a fan located in the air supply duct. The disordered airflow in the air supply duct forms laminar airflow after passing through the flow equalization membrane. The laminar airflow is blown out through the mounting hole and flows from top to bottom between the mounting hole and the cage placement area. Then, under the negative pressure suction of the return air hole, it carries the polluted airflow emitted during the cage changing process back into the air supply duct through the return air hole and is filtered by the filter. This solution provides better stability of the laminar flow protection formed by the laminar airflow between the mounting hole and the cage placement area, which can better prevent the escape of dust and other tiny pollutants during the cage changing process, protecting operators from biological hazards. Moreover, under the same laminar flow protection performance, the cage changing platform can be made smaller, resulting in a lighter cage changing platform that is easier to move and relocate, making it more convenient to move and use within animal husbandry facilities.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0020] Figure 1 A three-dimensional structural diagram of a cage-changing platform provided for related technologies;

[0021] Figure 2 For this Figure 1 A schematic cross-sectional view of the left side of the cage changing platform shown.

[0022] Figure 3 for Figure 1 The diagram shows a top view of the cage changing platform.

[0023] The correspondence between the reference numerals and the component names is as follows:

[0024] 100 Air supply cover, 110 Mounting hole, 120 Light source module, 200 Main body, 210 Cage placement area, 211 Return air hole, 220 First sub-air duct, 230 Second sub-air duct, 240 Leg housing area, 250 Handle, 260 Mounting area, 300 Air duct, 310 Human-machine interaction module, 400 Fan, 500 Flow equalization membrane, 610 Primary filter element, 620 Secondary filter element, 700 Wind speed sensor, 810 Chassis, 820 Lifting mechanism. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0026] The cage changing platform provided in this embodiment of the utility model, such as Figures 1 to 3 As shown, it includes: an air supply cover 100, which has a mounting hole 110; a main body 200, which is located below the air supply cover 100, and has a cage placement area 210 on its top surface, which has a return air hole 211, with the mounting hole 110 opposite to the return air hole 211; an air duct 300, which is located between the air supply cover 100 and the main body 200 and connects the air supply cover 100 and the main body 200, and the air supply cover 100, the air duct 300 and the main body 200 form an air supply duct, with the return air hole 211 as the inlet of the air supply duct and the mounting hole 110 as the outlet of the air supply duct; a fan 400, a flow equalization membrane 500 and a filter element, which are all located in the air supply duct, with the flow equalization membrane 500 located at the mounting hole 110.

[0027] In this cage changing platform, the flow equalization membrane 500 and the fan 400 are located in the air supply duct. The disordered airflow in the air supply duct forms laminar airflow after passing through the flow equalization membrane 500. The laminar airflow is blown out through the mounting hole 110 and flows from top to bottom between the mounting hole 110 and the cage placement area 210. Then, under the negative pressure suction of the return air hole 211, it carries the polluted airflow emitted during the cage changing process back into the air supply duct through the return air hole 211 and is filtered by the filter. This scheme provides better stability of the laminar flow protection formed by the laminar airflow between the mounting hole 110 and the cage placement area 210, which can better prevent the escape of dust and other small pollutants during the cage changing process, protect the operators from biological hazards, and, under the same laminar flow protection performance, the size of the cage changing platform can be made smaller, thus reducing the weight of the cage changing platform, which is conducive to the movement and relocation of the cage changing platform and makes it more convenient to use.

[0028] In some embodiments, such as Figure 2 As shown, the flow equalization membrane 500 is located at the mounting hole 110, which improves the laminar flow protection effect of the laminar air flowing from top to bottom between the mounting hole 110 and the cage placement area 210; the fan 400 and the filter are located inside the main body 200, which makes it easier to maintain the fan 400 and replace the filter.

[0029] In some examples, such as Figure 2 As shown, the filter includes a primary filter 610 and a secondary filter 620. The main body 200 has a first sub-air duct 220 and a second sub-air duct 230 inside. The second sub-air duct 230 is located on the upper rear side of the first sub-air duct 220 and is connected to the air duct 300. The secondary filter is located in the second sub-air duct 230. The upper part of the first sub-air duct 220 is connected to the return air hole 211. The primary filter is located in the first sub-air duct 220 and is opposite to the return air hole 211. The fan 400 is connected to the lower part of the first sub-air duct 220 and the lower part of the second sub-air duct 230. The air supply duct includes the first sub-air duct 220 and the second sub-air duct 230. This scheme has a compact internal structure and occupies little space, which is beneficial to reducing the volume of the cage changing platform. Among them, the primary filter element 610 is a pre-filter and the secondary filter element 620 is a high-efficiency filter. Under the negative pressure suction of the return air hole 211, the laminar air carrying the polluted airflow emitted by the feeding cages first passes through the primary filter and the high-efficiency filter in sequence from the return air hole 211 for cleaning treatment, and then flows through the air duct 300, the flow equalization membrane 500 and the air supply cover 100 to the mounting hole 110.

[0030] In some embodiments, such as Figures 1 to 3As shown, the return air vents 211 consist of multiple first through-holes arranged in a matrix, filling the cage placement area 210. This effectively increases the return air volume of the return air vents 211. The diameter of each first through-hole is set to 4mm~8mm, and the spacing between adjacent first through-holes is 10mm~20mm. The dimensions of the cage placement area 210 are 710mm~770mm in the left-right direction and 530mm~590mm in the front-back direction. This allows for the use of only one fan 400 to ensure a laminar airflow velocity of 0.5m / s, preventing the leakage of contaminated airflow during cage changing and achieving dual protection for both the experimental animals and the experimenters. (This scheme is suitable for high-throughput 400 m³ / s.) 3 At a laminar flow rate of / h, the cage placement area 210 can simultaneously hold 4-8 cages, ensuring a fully enclosed laminar flow around the cages (preventing the leakage of polluted airflow during cage changing). Furthermore, compared to a cage changing platform using two 400mm fans, the cage changing platform provided in this application has lower manufacturing costs, is lighter, and can be made smaller. Moreover, the diameter of each first through-hole is set to 4mm-8mm (e.g., 6mm), allowing multiple first through-holes to filter larger materials, followed by a pre-filter to filter large dust particles, and a high-efficiency filter to filter fine dust.

[0031] In this application, the fan 400 uses a volute fan, such as a 24V volute fan. The 24V volute fan can be automatically controlled to achieve high wind speed and low noise operation. The motor of the volute fan is located inside the first sub-duct 220, so the airflow passing through the first sub-duct 220 can also cool the motor, which is more conducive to the continuous high wind speed and low noise operation of the volute fan.

[0032] In some embodiments, such as Figure 1 and Figure 3 As shown, the top surface of the main body 200 also has an installation area 260, which is located behind the cage placement area 210. The lower end of the air duct 300 is fixed to the installation area 260, and the upper end of the air duct 300 is fixed to the rear of the air supply cover 100. This design only has obstruction (air duct 300) on the rear side of the cage placement area 210. There is no obstruction on the left, right, and front sides of the cage placement area 210. This ensures that the operator's operating space in the left and right directions of the cage placement area 210 is completely unobstructed, which is more conducive to the operator changing cages on the front side of the cage placement area 210. Among them, the air duct 300 includes two air ducts that are spaced apart on the left and right. The lower ends of the two air ducts 300 are located in the installation area 260, and the upper ends of the two air ducts 300 are connected to the rear end of the air supply cover 100.

[0033] In some embodiments, such as Figure 1 and Figure 2As shown, the front side of the duct 300 is equipped with a human-machine interface module 310 and a storage component. The storage component is located below the human-machine interface module 310. The main body 200 houses a control module (including a PLC programmable controller, which adjusts the speed of the fan 400 based on the wind speed detected by the wind speed sensor 700, thus automatically adjusting the wind speed of the laminar flow). The control module is electrically connected to the human-machine interface module 310. This design not only facilitates the operator's access to operate the human-machine interface module 310, but also allows the operator to monitor the operating status of the cage-changing platform in real time through the human-machine interface module 310. Furthermore, the operator is less likely to accidentally touch the human-machine interface module 310 during use and movement of the cage-changing platform. The storage component, located below the human-machine interface module 310, is used to store cage-changing auxiliary tools. This design also facilitates the operator's access to these tools within the storage component. The storage component can be a storage bag or a storage box, etc.

[0034] In some embodiments, such as Figure 2 As shown, the air supply cover 100 is equipped with a light source module 120 and a camera module, and the main body 200 also contains a power supply module. The human-machine interaction module 310, the light source module 120, the camera module, and the power supply module are all electrically connected to the control module. The camera module is used to record the cage changing operation process for easy review later; the light source module 120 is used to provide supplementary lighting for the area between the mounting hole 110 and the return air hole 211, which helps the experimenter to better perform the cage changing operation.

[0035] In some embodiments, the lower front part of the main body 200 is provided with a rearwardly recessed leg receiving area 240, so that the experimenter can insert his / her legs into the leg receiving area 240 and perform cage changing operations while sitting. The bottom surface of the air supply cover 100 is an inclined surface that extends upward from back to front. The flow equalization membrane 500 adopts a mesh size of 100~150. The diameter of the air passage on the flow equalization membrane 500 varies with different mesh sizes. The light source module 120 is located on the upper side of the flow equalization membrane 500. The light emitted by the light source module 120 passes through the air passage on the flow equalization membrane 500 and is directed towards the cage placement area 210, thereby providing supplemental lighting to the area between the mounting hole 110 and the return air hole 211.

[0036] Of course, it can also be, such as Figure 1 and Figure 2 As shown, the light source module 120 is located on the lower side of the air supply cover 100, which can also achieve the purpose of this application. Its purpose has not deviated from the design concept of this utility model, and will not be repeated here. It should also fall within the protection scope of this application.

[0037] In some embodiments, such as Figure 1 and Figure 2As shown, the front end of the air supply cover 100 is located behind the front end of the cage placement area 210. The distance between the front end of the air supply cover 100 and the front end of the cage placement area 210 in the front-back direction is 360mm~420mm. The distance between the top surface of the air supply cover 100 and the cage placement area 210 in the vertical direction is 820mm~880mm. The minimum distance between the bottom surface of the air supply cover 100 and the cage placement area 210 in the vertical direction is 570mm~630mm. With this scheme, the experimenter can achieve a 360-degree full-view cage replacement operation, and the head will not bump into the air supply cover 100.

[0038] In some embodiments, such as Figures 1 to 3 As shown, the left and right ends of the cage placement area 210 are provided with handles 250 that can be pushed and pulled up and down. Each handle 250 is arranged in the front-back direction. Pulling up and fixing the handle 250 allows the experimenter to easily move the cage changing platform through the handles 250. During the cage changing process, the two handles 250 can also be pulled up and fixed to limit the cage in the left and right directions and prevent the cage from falling in the left and right directions.

[0039] In some examples, such as Figure 1 and Figure 2 As shown, the cage-changing platform also includes: a base 810, located below the main body 200 and equipped with casters on its bottom surface; and a lifting mechanism 820, connecting the main body 200 and the base 810. By raising or lowering the main body 200 using the lifting mechanism 820, it ensures that experimenters of different heights can comfortably perform cage-changing operations in the cage placement area 210, thus improving the comfort of experimenters of different heights. The lifting height of the lifting mechanism 820 can be set to 0~10cm. The power module is configured as a UPS uninterruptible power supply. The rollers include multiple casters and directional casters (in this application, there are four rollers, including two casters and two directional casters). The casters have a brake locking structure. The lifting mechanism 820 includes multiple lifting mechanisms 820, which are arranged at intervals along the circumference of the chassis 810 (in this application, there are four lifting mechanisms 820, which are evenly distributed and configured to rise and fall synchronously).

[0040] In some embodiments, such as Figure 2 As shown, the main body 200 includes a frameless shell, and the cage placement area 210 is located on the top surface of the top plate of the frameless shell, thus creating a space with an area of ​​approximately 0.58m². 2 It occupies a space of approximately 1m³. 3This is a small, portable cage changing platform weighing approximately 80kg. The frameless casing's side, top, and bottom walls are made of stainless steel or aluminum alloy, allowing for cleaning and disinfection with acid and alkali chemicals. The surface roughness of the frameless casing is set to no more than 1.0µm (e.g., 0.8µm), making it easier to wipe clean. During operation, the air duct can be fumigated with hydrogen peroxide for disinfection.

[0041] In summary, the technical solution provided by this utility model embodiment features a flow equalization membrane and a fan located in the air supply duct. The disordered airflow in the air supply duct forms laminar airflow after passing through the flow equalization membrane. The laminar airflow is blown out through the mounting hole and flows from top to bottom between the mounting hole and the cage placement area. Then, under the negative pressure suction of the return air hole, it carries the polluted airflow emitted during the cage changing process back into the air supply duct through the return air hole and is filtered by the filter. This solution provides better stability of the laminar flow protection formed by the laminar airflow between the mounting hole and the cage placement area, which can better prevent the escape of dust and other tiny pollutants during the cage changing process, protecting operators from biological hazards. Moreover, under the same laminar flow protection performance, the cage changing platform can be made smaller, resulting in a lighter cage changing platform that is easier to move and relocate, making it more convenient to move and use within animal husbandry facilities.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "'mouth' structure", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Although the embodiments disclosed in this utility model are as described above, the content described is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be defined by the appended claims.

Claims

1. A cage changing platform, characterized in that, include: The air supply cover is equipped with mounting holes; The main body is located below the air supply cover. The top surface of the main body has a cage placement area, and the cage placement area is provided with a return air hole. The mounting hole is opposite to the return air hole. The air duct is located between the air supply cover and the main body and connects the air supply cover and the main body. The air supply cover, the air duct and the main body form an air supply channel. The inlet of the air supply channel is the return air hole and the outlet of the air supply channel is the mounting hole. The fan, flow equalization membrane, and filter are all located in the air supply duct.

2. The cage changing platform according to claim 1, characterized in that, The flow equalization membrane is disposed at the mounting hole, and the fan and the filter are disposed inside the main body.

3. The cage changing platform according to claim 2, characterized in that, The filter element includes a primary filter element and a secondary filter element. The main body has a first sub-air duct and a second sub-air duct inside. The second sub-air duct is located on the upper rear side of the first sub-air duct and is connected to the air duct. The secondary filter element is disposed in the second sub-air duct. The first sub-air duct is connected to the return air hole. The primary filter element is disposed in the first sub-air duct and is opposite to the return air hole. The fan connects the first sub-air duct and the second sub-air duct. The air supply duct includes the first sub-air duct and the second sub-air duct.

4. The cage changing platform according to any one of claims 1 to 3, characterized in that, The return air vents are multiple first through holes arranged in a matrix, which fill the cage placement area. The diameter of each first through hole is set to 4mm~8mm, the spacing between adjacent first through holes is 10mm~20mm, the size of the cage placement area in the left-right direction is 710mm~770mm, and the size of the cage placement area in the front-back direction is 530mm~590mm.

5. The cage changing platform according to any one of claims 1 to 3, characterized in that, The top surface of the main body also has an installation area, which is located behind the cage placement area. The lower end of the air duct is fixed to the installation area, and the upper end of the air duct is fixedly connected to the rear part of the air supply cover. The air duct has a human-machine interface module and a storage component on its front side, with the storage component located below the human-machine interface module. The air supply cover has a light source module and a camera module. The main body has a control module and a power module. The human-machine interface module, the light source module, the camera module, and the power module are all electrically connected to the control module.

6. The cage changing platform according to any one of claims 1 to 3, characterized in that, The lower front part of the main body is provided with a leg receiving area that is recessed to the rear, and the bottom surface of the air supply cover is an inclined surface that extends upward from back to front.

7. The cage changing platform according to claim 6, characterized in that, The front end of the air supply cover is located behind the front end of the cage placement area. The distance between the front end of the air supply cover and the front end of the cage placement area in the front-back direction is 360mm~420mm. The distance between the top surface of the air supply cover and the cage placement area in the vertical direction is 820mm~880mm. The distance between the bottom surface of the air supply cover and the cage placement area in the vertical direction is 570mm~630mm.

8. The cage changing platform according to any one of claims 1 to 3, characterized in that, The cage placement area is provided with handles that can be pushed up and down at both ends, and each handle is arranged in the front-to-back direction.

9. The cage changing platform according to any one of claims 1 to 3, characterized in that, Also includes: The chassis is located below the main body and has rollers on its bottom surface; and A lifting mechanism connects the main body and the chassis.

10. The cage changing platform according to any one of claims 1 to 3, characterized in that, The main body includes a frameless shell, the roughness of the outer surface of the frameless shell is not greater than 1.0 μm, and the cage placement area is located on the top surface of the top plate of the frameless shell.

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