A biological safety cabinet
By introducing adjustable armrest components into the biosafety cabinet, the problem that traditional fixed support frames cannot meet the needs of multiple people working together is solved, improving experimental efficiency and comfort, while reducing maintenance difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAYUAN (SHANGHAI) BIOPHARMACEUTICAL CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-05-29
AI Technical Summary
The existing biosafety cabinets have fixed and non-adjustable hand support structures, which cannot meet the needs of multi-person collaborative operation, resulting in hands blocking the air outlet, triggering safety alarms, and reducing experimental efficiency.
A biosafety cabinet comprising a drive assembly and a handrail assembly has been designed. The handrail assembly is movable and adjustable through a square shell and an L-shaped handrail plate. Combined with bolt rods, rubber pads, and ball bearings, it enables multiple position selection and height adjustment to meet the needs of different body types and operating habits.
It improves the comfort and efficiency of laboratory personnel, reduces fatigue, lowers the difficulty and cost of equipment maintenance, and extends the service life.
Smart Images
Figure CN224293292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biosafety cabinet design technology, and in particular to a biosafety cabinet. Background Technology
[0002] As a core protective device in modern biological laboratories, biosafety cabinets play an irreplaceable role in ensuring the safety of laboratory personnel and maintaining a clean experimental environment. Through their unique negative pressure design and air purification system, these cabinets effectively curb the diffusion of bioaerosols generated during experiments, providing crucial primary protection for operators. With the rapid development of biomedical research, genetic engineering, and vaccine development, the application scenarios for biosafety cabinets are becoming increasingly diversified. Especially in experimental environments requiring multi-person collaborative operation, traditional designs have revealed significant limitations.
[0003] Taking AMES experiments as an example, such research requiring teamwork often necessitates multiple researchers operating simultaneously inside a biosafety cabinet. However, the existing hand support structure of biosafety cabinets has significant drawbacks: the fixed installation method not only limits the flexibility of the usage location but also makes it difficult to meet the needs of multiple people operating at the same time. This design flaw directly leads to situations where hands easily block the air vents during experiments, thereby triggering the equipment's safety alarm system and seriously affecting the experimental process and data reliability. In addition, the single and non-adjustable support frame structure cannot adapt to the personalized needs of different experimental operating postures and body types, further reducing experimental efficiency and personnel comfort.
[0004] To address these pain points in practical applications, there is an urgent need for innovative improvements to the hand support system of biosafety cabinets. The ideal solution should break through the limitations of traditional fixed structures and realize functions such as movable support frames, multiple position selection, and adjustable range, thereby improving the practicality of the equipment and meeting the growing collaborative operation needs of modern biological laboratories. This improvement can not only optimize experimental procedures but also fundamentally ensure the safety of experimental personnel and the accuracy of experimental results. Utility Model Content
[0005] This invention provides a biosafety cabinet that solves the problems mentioned in the background.
[0006] To solve the above-mentioned technical problems, this utility model provides a biosafety cabinet, including a cabinet body, an internal mounting platform, a ventilation opening on the platform, a drive assembly mounted on one side of the ventilation opening, and a handrail assembly mounted by horizontal movement of the drive assembly. The handrail assembly includes a square shell that moves horizontally on the top of the platform, an L-shaped handrail plate inserted into the top of the square shell and fixedly connected, and the side wall of the square shell connected to the drive assembly for translation and position limitation.
[0007] Preferably, the square shell and the L-shaped handle plate are threaded together on both sides with bolt rods, and the side of the L-shaped handle plate has a row of bolt holes corresponding to the bolt rods.
[0008] Preferably, a rubber pad is adhered to the surface of the L-shaped handrail, and a film can be adhered to the surface of the rubber pad.
[0009] Preferably, the bottom of the square shell is provided with a row of ball grooves, and balls are installed in the grooves, which roll on the platform surface.
[0010] Preferably, the drive assembly includes a crossbar and a lead screw fixed to the top of the platform. The crossbar passes through the block to form a sliding connection. The lead screw is threaded to a round sleeve. The round sleeve passes through the corresponding round opening of the block to rotate with low resistance. Knob sleeves are fixedly connected to both ends of the round sleeve. The block is fixedly mounted on the platform.
[0011] The surface of the knob sleeve is designed to be non-slip, and one end is in contact with the side wall of the block. The inner wall of the knob sleeve is designed not to contact the lead screw.
[0012] Preferably, the block has a square groove on one side, and the part of the round sleeve located in the groove has a ring of external teeth. The external teeth mesh with a toothed plate. The toothed plate is fixed to one side of the square rod. The square rod slides through one side of the box body, and the box body is fixed to one side of the block. The inner wall of the box body is connected to the toothed plate by a spring.
[0013] Preferably, the crossbar and lead screw are fixed to the side wall of the connecting plate, and a convex block is fixed to the side wall of the connecting plate. The convex block is inserted from the top of the slot, and the slot is fixed to the top of the platform. The top of the slot and the convex block are jointly nailed to a limiting plate.
[0014] Preferably, the crossbar and lead screw can jointly wrap multiple sections of protective cloth, and both ends of the protective cloth can contact the connecting plate and the side wall of the block.
[0015] Compared with related technologies, the biosafety cabinet provided by this utility model has the following beneficial effects:
[0016] This utility model provides a biosafety cabinet in which the position and height of the handrail component can be adjusted flexibly according to the body shape and operating habits of different staff members, accurately adapting to diverse usage needs, greatly improving the comfort of staff members during use, reducing fatigue caused by long-term operation, and thus effectively improving work efficiency.
[0017] On the other hand, the drive assembly and the handle assembly adopt a detachable design, which facilitates quick installation and disassembly according to the actual use scenario. At the same time, it can protect the crossbar and lead screw from contamination by reagents, etc., reduce maintenance difficulty and cost, extend the service life of the equipment, and meet the use needs of various complex working environments. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;
[0019] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;
[0020] Figure 3 This is a three-dimensional structural diagram of the handrail component of this utility model;
[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the drive component of this utility model. Figure 1 ;
[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the drive component of this utility model. Figure 2 ;
[0023] Figure 6 This is a partial three-dimensional structural diagram of the drive component of this utility model;
[0024] Figure 7 This is a top view schematic diagram of the positioning ring block of this utility model.
[0025] Numbered in the diagram: 1. Cabinet; 11. Platform; 12. Ventilation opening; 2. Drive assembly; 21. Crossbar; 22. Lead screw; 23. Square block; 24. Round sleeve; 25. Knob sleeve; 26. Box body; 27. Square rod; 28. Spring; 29. Toothed plate; 210. External tooth; 211. Convex block; 212. Slot; 213. Limiting plate; 214. Protective cloth; 3. Handrail assembly; 31. L-shaped handrail plate; 32. Square shell; 33. Bolt rod; 34. Rubber pad; 35. Ball bearing. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0027] Depend on Figures 1-7The present invention includes a cabinet 1, an internal platform 11, a ventilation opening 12 on the platform 11, a drive assembly 2 on one side of the ventilation opening 12, and a handle assembly 3 installed by the drive assembly 2 moving horizontally. The handle assembly 3 includes a plurality of square shells 32 that move horizontally on the top of the platform 11, and there are an even number of square shells 32. An L-shaped handle plate 31 is inserted into the top of the square shell 32 and fixedly connected. The side walls of the square shell 32 are connected to the drive assembly 2 for translation and position limitation.
[0028] With the design of the handrail assembly 3, multiple workers can sit on one side of the platform 11 of the cabinet 1 during work. When adjusting, the position of the square shell 32 is adjusted by the drive assembly 2, and the adjustment is highly accurate. After the adjustment is completed, the L-shaped handrail 31 is inserted into the top of the square shell 32 and fixed. The angle of the L-shaped handrail 31 can be designed to be different (for standing work, it can be designed to tilt upwards) to adapt to different workers.
[0029] The square shell 32 and the L-shaped handle plate 31 are connected by bolt rods 33 on both sides. The side of the L-shaped handle plate 31 has a row of bolt holes corresponding to the bolt rods 33. A rubber pad 34 is glued to the surface of the L-shaped handle plate 31. A film can be glued to the surface of the rubber pad 34. The bottom of the square shell 32 is provided with a row of ball grooves, and ball balls 35 are installed in the grooves. The ball balls 35 roll on the surface of the platform 11.
[0030] Furthermore, by selecting suitable bolt holes on the side of the L-shaped handrail 31 and connecting them with the square shell 32 via bolt rods 33, the height of the L-shaped handrail 31 can be finely adjusted. At the same time, the rubber pad 34 improves comfort, and the film can provide protection to prevent some sticky substances from sticking to the rubber pad 34. PE film or similar materials can be selected. When the L-shaped handrail 31 moves, the ball 35 rolls on the surface of the platform 11, providing a certain degree of support.
[0031] The drive assembly 2 includes a crossbar 21 and a lead screw 22 fixed to the top of the platform 11. The crossbar 21 passes through the block 23 to form a sliding connection. The lead screw 22 is threaded to the round sleeve 24. The round sleeve 24 passes through the corresponding round opening of the block 23 to rotate with low resistance. The two ends of the round sleeve 24 are fixedly connected to the knob sleeve 25. The block 23 is fixed to the side wall of the square shell 32. The surface of the knob sleeve 25 is designed to be non-slip, and one end is in contact with the side wall of the block 23. The inner wall of the knob sleeve 25 is designed not to contact the lead screw 22.
[0032] A square groove is provided on one side of the block 23. The part of the round sleeve 24 located in the groove is provided with a ring of external teeth 210. The external teeth 210 mesh with the toothed plate 29. The grooves of the external teeth 210 and the toothed plate 29 are both designed with high density. The toothed plate 29 is fixed to one side of the square rod 27. The square rod 27 slides through the opening on one side of the box 26. The box 26 is fixed to one side of the block 23. The inner wall of the box 26 is connected to the toothed plate 29 by a spring 28.
[0033] By designing the drive assembly 2, when the square shell 32 is moved, one hand pulls the square rod 27 outward, the toothed plate 29 moves outward to compress the spring 28, and it loses engagement with the external tooth 210. Then, the other hand pinches the knob sleeve 25 at either end to make it rotate. Since the knob sleeve 25 is fixedly connected to the round sleeve 24, the round sleeve 24 rotates accordingly. Because the round sleeve 24 is threadedly connected to the lead screw 22, and the round sleeve 24 rotates with low resistance within the corresponding round opening of the square block 23, the square block 23 is restricted by the crossbar 21 to move only in the horizontal direction. Therefore, when the round sleeve 24 rotates, the square block 23 will move horizontally in a straight line along the direction of the crossbar 21 and the lead screw 22. The square block 23 is fixed to the side wall of the square shell 32, so the square shell 32 will also move horizontally in the direction of the crossbar 21 and the lead screw 22. Block 23 moves together. During the movement, the ball 35 at the bottom of the square shell 32 rolls on the surface of the platform 11, providing smooth rolling support for the movement of the square shell 32, reducing friction during movement, and ensuring the stability of the movement of the square shell 32, avoiding shaking or jamming. When the square shell 32 moves to the appropriate position, the outwardly pulled square rod 27 is released. Under the elastic force of the spring 28, the toothed plate 29 moves inward quickly and re-engages with the external teeth 210 on the round sleeve 24. Note that if it cannot engage, the position can be readjusted by a small distance, which has little impact. Some scale marks can also be designed on the crossbar 21 for easy alignment. This is a conventional design and will not be described in detail here.
[0034] The crossbar 21 and the lead screw 22 are fixed to the side wall of the connecting plate, and the side wall of the connecting plate is fixed with a convex block 211. The convex block 211 is inserted from the top of the slot 212, and the slot 212 is fixed to the top of the platform 11. The top of the slot 212 and the convex block 211 are jointly nailed to the limit plate 213.
[0035] Thus, during installation, the convex block 211 is inserted from the top of the slot 212 and then fixed by the limiting plate 213, making the drive assembly 2 and the handle assembly 3 detachable to meet the usage needs of different situations.
[0036] The crossbar 21 and the lead screw 22 can jointly wrap multiple sections of protective cloth 214, and the two ends of the protective cloth 214 can contact the side walls of the connecting plate and the block 23.
[0037] Furthermore, after adjustment, the crossbar 21 and lead screw 22, which are divided into multiple segments, can be wrapped with protective cloth 214 as much as possible to prevent reagents from getting on the crossbar 21 and lead screw 22 during operation. After wrapping, some easy-to-remove adhesive tape can be used for fixation. This is a conventional design and will not be elaborated on here.
[0038] Working principle: During adjustment, pull the square rod 27 outward with one hand. Under the action of external force, the toothed plate 29 moves outward to compress the spring 28 and loses engagement with the external tooth 210 on the round sleeve 24. With the other hand, pinch the knob sleeve 25 and rotate it. The round sleeve 24 rotates accordingly. The block 23 will drive the square shell 32 fixed on its side wall to move horizontally in a straight line along the direction of the crossbar 21 and the lead screw 22. When the square shell 32 moves to the appropriate position, release the square rod 27. Under the action of the elastic force of the spring 28, the toothed plate 29 re-engages with the external tooth 210. If it cannot engage, the position of the square shell 32 can be finely adjusted. At the same time, a scale mark can be designed on the crossbar 21 to assist in alignment.
[0039] After adjustment, insert the L-shaped handrail 31 into the top of the square shell 32. Fine-tune the height of the L-shaped handrail 31 by selecting the appropriate bolt hole on the side of the L-shaped handrail 31 and connecting it with the square shell 32 using the bolt rod 33. The rubber pad 34 on the surface of the L-shaped handrail 31 improves the comfort of the staff during use. The film adhered to the surface of the rubber pad 34 can protect against the contamination of sticky substances. After adjustment, the protective cloth 214 can be used to wrap and fix the multi-segmented crossbar 21 and screw rod 22 as much as possible.
[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A biosafety cabinet, comprising a cabinet body (1), an installation platform (11) inside the cabinet body (1), wherein the platform (11) is provided with a ventilation opening (12), characterized in that: A drive assembly (2) is installed on the platform (11) on one side of the vent (12), and a handrail assembly (3) is installed by the horizontal movement of the drive assembly (2); The handrail assembly (3) includes a square shell (32) that moves horizontally on the top of the platform (11). An L-shaped handrail plate (31) is inserted into the top of the square shell (32) and fixedly connected. The side wall of the square shell (32) is connected to the drive assembly (2) for translation and position limitation.
2. A biosafety cabinet according to claim 1, characterized in that, The square shell (32) and the L-shaped handle plate (31) are threaded together on both sides with bolt rods (33), and the side of the L-shaped handle plate (31) has a row of bolt holes corresponding to the bolt rods (33).
3. A biosafety cabinet according to claim 2, characterized in that, The L-shaped handrail (31) has a rubber pad (34) bonded to its surface, and the surface of the rubber pad (34) can be bonded with a thin film.
4. A biosafety cabinet according to claim 2, characterized in that, The bottom of the square shell (32) is provided with a row of ball grooves, and ball (35) is installed in the grooves. The ball (35) rolls on the surface of the platform (11).
5. A biosafety cabinet according to claim 1, characterized in that, The drive assembly (2) includes a crossbar (21) and a lead screw (22) fixed to the top of the platform (11). The crossbar (21) passes through the block (23) to form a sliding connection. The lead screw (22) is threadedly connected to the round sleeve (24). The round sleeve (24) passes through the corresponding round opening of the block (23) to rotate with low resistance. The two ends of the round sleeve (24) are fixedly connected to the knob sleeves (25). The block (23) is fixed to the side wall of the square shell (32). The surface of the knob sleeve (25) is designed to be non-slip, and one end is in contact with the side wall of the block (23). The inner wall of the knob sleeve (25) is designed not to contact the lead screw (22).
6. A biosafety cabinet according to claim 5, characterized in that, The block (23) has a square groove on one side, and the part of the round sleeve (24) located in the groove has a ring of external teeth (210). The external teeth (210) mesh with a toothed plate (29). The toothed plate (29) is fixed to one side of the square rod (27). The square rod (27) slides through one side of the box (26), and the box (26) is fixed to one side of the block (23). The inner wall of the box (26) is connected to the toothed plate (29) by a spring (28).
7. A biosafety cabinet according to claim 5, characterized in that, The crossbar (21) and the lead screw (22) are fixed to the side wall of the connecting plate, and a convex block (211) is fixed to the side wall of the connecting plate. The convex block (211) is inserted from the top of the slot (212), and the slot (212) is fixed to the top of the platform (11). The top of the slot (212) and the convex block (211) are jointly nailed to the limit plate (213).
8. A biosafety cabinet according to claim 7, characterized in that, The crossbar (21) and the lead screw (22) can jointly wrap multiple sections of protective cloth (214), and the two ends of the protective cloth (214) can contact the side walls of the connecting plate and the block (23).