Biological safety cabinet convenient to use

Abstract

The utility model discloses a biosafety cabinet convenient to use, which comprises a bottom frame, a top frame and four groups of support connecting rods, the top frame and the bottom frame are rectangular frames, each support connecting rod comprises two support rods, the first ends of the two support rods are mutually hinged, and the second ends of the support rods are respectively hinged to the lower side of the top frame and the upper side of the bottom frame; the two supporting rods are installed at the four top corners of the bottom frame and the top frame respectively, two driving connecting rods are further arranged, the two ends of each driving connecting rod are rotatably installed at the hinged positions of the two supporting rods respectively, a driving frame is arranged between the bottom frame and the top frame, a driving screw is rotatably installed on the driving frame, and the middles of the driving connecting rods are in threaded connection with the driving screw. A driving motor is fixedly installed on the driving frame, and an operation cabinet is fixedly installed above the top frame. The supporting connecting rod and the driving connecting rod are arranged and matched with the driving screw rod, so that the height of the operation cabinet can be adjusted when the operation cabinet is used, and the operation cabinet can meet the use requirements of different heights.

Description

Technical Field

[0001] This utility model belongs to the field of biosafety cabinet technology and relates to a biosafety cabinet that is easy to use. Background Technology

[0002] A biosafety cabinet is a box-type air-purifying negative pressure safety device that prevents the aerosol release of hazardous or unknown biological particles during experimental procedures. During operation, the biosafety cabinet uses negative pressure to circulate gases within the cabinet, minimizing the impact on operators.

[0003] However, existing biosafety cabinets are placed on a frame structure, and the height that staff of different heights need to adapt to when operating them is different, especially the height of the respiratory tract, which reduces the adaptability of the biosafety cabinet's protective effect to different groups of people. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes an easy-to-use biosafety cabinet that effectively solves the issues in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An easy-to-use biosafety cabinet includes:

[0007] The base frame and the top frame are both rectangular frames;

[0008] The support link includes two support rods, the first ends of the two support rods are hinged to each other, and the second ends of the support rods are respectively hinged to the lower side of the top frame and the upper side of the base frame. The support link is provided in four sets, which are respectively installed at the four corners of the base frame and the top frame.

[0009] A drive link is provided, with its two ends rotatably mounted at the hinged joint positions of the two support rods. The axial direction of the drive link is parallel to the hinged rotation axis of the support rods. Two drive links are provided, each connecting one of the two support rods.

[0010] A drive frame is located between the base frame and the top frame, and both ends of the drive linkage can be slidably mounted on the drive frame;

[0011] A drive screw is rotatably mounted on the drive frame. The middle parts of the drive connecting rods are threadedly connected to the drive screw. When the drive screw rotates, the two drive connecting rods slide towards each other or slide in opposite directions.

[0012] A drive motor is fixedly mounted on the drive frame, and the output end of the drive motor is fixedly connected to the drive screw;

[0013] The control cabinet is fixedly installed above the top frame.

[0014] Optionally, an auxiliary connecting rod is hinged to the middle of the support rod, and the end of the auxiliary connecting rod away from the support rod is hinged to the upper side of the drive frame.

[0015] Optionally, the drive motor is electrically connected to a start switch, which is mounted on the base frame.

[0016] Optionally, the base frame is rotatably mounted with a pedal, the pedal rotation shaft is located in the middle of the pedal, and the start switch includes a forward and reverse switch, which are located at both ends of the pedal respectively.

[0017] Optionally, there are two drive screws, which are located near the two ends of the drive connecting rod. The output end of the drive motor is connected to a single-input double-output reducer, and the drive screws are respectively connected to the output end of the reducer.

[0018] Optionally, the drive link is slidably mounted with a limit tube, and a limit spring is provided between both ends of the drive link and the limit tube. The limit tube is threadedly connected to the drive screw.

[0019] Optionally, a caster wheel with brakes is installed under the base frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting up support rods and drive rods, which cooperate with drive screws, the height of the control cabinet can be adjusted during use, so that the control cabinet can adapt to the usage needs of different heights;

[0022] 2. By setting auxiliary connecting rods, support is provided for the drive frame section, thereby improving the structural stability of the drive frame section;

[0023] 3. During the experiment, the experimenter's hands are inside the control cabinet. Adjusting the height of the control cabinet may cause contamination. Therefore, the start switch is located on the base frame, allowing the experimenter to control the height with their feet, which facilitates operation and reduces the risk of contaminant leakage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the base frame portion according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the anti-limiting pipe part in an embodiment of this utility model.

[0027] Attached reference numerals: 11. Base frame; 12. Top frame;

[0028] 2. Supporting link; 21. Supporting rod; 22. Auxiliary link;

[0029] 3. Drive linkage;

[0030] 4. Drive frame;

[0031] 51. Drive screw; 511. Anti-limiting tube; 512. Anti-limiting spring; 52. Drive motor; 53. Pedal;

[0032] 6. Control cabinet. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figure 1 and Figure 2 This invention discloses a user-friendly biosafety cabinet, comprising a base frame 11, a top frame 12, and supporting rods 2. Both the top frame 12 and the base frame 11 are rectangular frames. The supporting rods 2 include two support rods 21, with their first ends hinged together and their second ends hinged to the lower side of the top frame 12 and the upper side of the base frame 11, respectively. Four sets of supporting rods 2 are provided, respectively installed at the four corners of the base frame 11 and the top frame 12. Two driving rods 3 are also provided, with their two ends rotatably mounted at the hinged positions of the two support rods 21. The driving rods 3 are axially... A hinged rotating shaft is connected to each other parallel to the support rod 21. Two drive rods 3 are respectively connected to two of the support rods 2. A drive frame 4 is set between the base frame 11 and the top frame 12. Both ends of the drive rods 3 can be slidably installed on the drive frame 4. The drive frame 4 is rotatably installed with a drive screw 51. The middle of the drive rods 3 is threadedly connected to the drive screw 51. When the drive screw 51 rotates, the two drive rods 3 slide towards each other or in opposite directions. A drive motor 52 is fixedly installed on the drive frame 4. The output end of the drive motor 52 is fixedly connected to the drive screw 51. An operating cabinet 6 is fixedly installed on the top frame 12.

[0035] Specifically, two H-shaped movable supports consisting of support rods 2 and drive rods 3 are installed below the control cabinet 6. The two drive rods 3 are connected by drive screws 51. When the drive screws 51 rotate and the drive rods 3 move closer to each other, the height of the support rods 2 decreases, thus lowering the height of the control cabinet 6. Conversely, when the drive screws 51 rotate in the opposite direction, the height of the control cabinet 6 increases.

[0036] In this way, by setting up the support link 2 and the drive link 3, which cooperate with the drive screw 51, the height of the control cabinet 6 can be adjusted during use, so that the control cabinet 6 can adapt to the usage needs of different heights.

[0037] It should be understood that a biosafety cabinet is a safety device that reduces the leakage of experimental materials such as pathogens through negative pressure. By setting up two H-shaped movable supports composed of support rods 2 and drive rods 3, the four top corners of the biosafety cabinet are synchronously supported and synchronously driven by the same drive screw 51, ensuring the stability of the biosafety cabinet during the lifting process and preventing the contents of the experimental container from being shaken and splashed, which would affect the safety of the biosafety cabinet.

[0038] In some feasible embodiments, the operating cabinet 6 is the functional part of the biosafety cabinet, which is existing technology and will not be described in detail here. Both the top frame 12 and the bottom frame 11 are rectangular frames. For easy movement, the bottom frame 11 is equipped with a universal wheel support rod 21 with brakes and a drive linkage 3, both of which are rectangular rods. The two ends of the drive linkage 3 are fixedly connected to cylindrical ends, which are rotatably connected to the two support rods 21.

[0039] The drive frame 4 is a rectangular frame. Sliding holes are provided on both sides of the drive frame 4 for mounting the drive connecting rod 3. The drive connecting rod 3 can be slidably installed in the sliding holes. The drive screw 51 passes through the two drive connecting rods 3 and is threadedly connected to the drive connecting rods 3. The threads at both ends of the drive screw 51 are turned in opposite directions, so that when the drive screw 51 rotates, the two drive connecting rods 3 move in opposite directions.

[0040] As one specific embodiment of a user-friendly biosafety cabinet provided in the application, an auxiliary connecting rod 22 is hinged to the middle of the support rod 21, and the end of the auxiliary connecting rod 22 away from the support rod 21 is hinged to the upper side of the drive frame 4.

[0041] Overall, by setting up auxiliary connecting rod 22, support is provided for the drive frame 4, thereby improving the structural stability of the drive frame 4.

[0042] In some feasible embodiments, the auxiliary link 22 is a rectangular rod, and the distance between the rotation axes at both ends of the auxiliary link 22 is half the distance between the rotation axes at both ends of the support rod 21.

[0043] As another specific embodiment of the user-friendly biosafety cabinet provided in the application, the drive motor 52 is electrically connected to a start switch, which is mounted on the base frame 11.

[0044] Considering the specific usage scenario, during the operation experiment, the experimenter's hands are inside the control cabinet 6. Adjusting the height of the control cabinet 6 may cause contamination. Therefore, the start switch is set on the base frame 11, allowing the experimenter to control the lifting and lowering with their feet, which is convenient for operation and reduces the risk of contaminant leakage.

[0045] Furthermore, the base frame 11 is rotatably mounted with a pedal 53, the rotation shaft of the pedal 53 is located in the middle of the pedal 53, and the start switch includes a forward and reverse switch, which are located at both ends of the pedal 53 respectively.

[0046] It should be understood that by setting the pedal 53 and placing the forward and reverse switches at both ends of the pedal 53, the pedal 53 can only trigger one switch at a time, reducing the possibility of simultaneous triggering and burning out the circuit during operation.

[0047] In some feasible configurations, the start switch is a push-button switch, and the pedal 53 is a rectangular plate.

[0048] As a specific embodiment of the biosafety cabinet provided in the application, there are two drive screws 51, which are located near the two ends of the drive connecting rod 3. The output end of the drive motor 52 is connected to a single-input double-output reducer, and the drive screws 51 are respectively connected to the output end of the reducer.

[0049] In specific usage scenarios, the two drive linkages 3 bear the component of the downward pressure from the control cabinet 6, which compresses part of the drive screw 51. By setting two drive screws 51, the pressure on the drive screw 51 is distributed, reducing the possibility of the drive screw 51 bending and deforming under pressure, and improving the stability of the support.

[0050] In some feasible ways, the single-input dual-output reducer is a synchronous dual-output reducer, which makes the two drive screws 51 rotate synchronously.

[0051] Further, please refer to Figure 2 and Figure 3 The drive link 3 is slidably mounted with a limit tube 511. A limit spring 512 is provided between the drive link 3 and both ends of the limit tube 511. The limit tube 511 is threadedly connected to the drive screw 51.

[0052] It should be understood that by setting the anti-limiting tube 511 and the anti-limiting spring 512, there is a certain sliding space between the drive screw 51 and the drive connecting rod 3. On the one hand, this reduces the interference that may occur when the two drive screws 51 operate synchronously. On the other hand, by setting the anti-limiting spring 512, when the drive motor 52 starts, the acceleration is large, which may cause the drive screw 51 to vibrate when it rotates. By setting the anti-limiting spring 512, the vibration compresses the spring axially, and the spring slowly returns to its original position, reducing the impact of sudden vibration on the operating cabinet 6, thereby reducing the impact on the experimental materials inside the operating cabinet 6 and reducing the possibility of experimental materials splashing.

[0053] In some feasible embodiments, the limiting tube 511 is an I-shaped tube, and the limiting spring 512 is sleeved on the outside of the limiting tube 511.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A user-friendly biosafety cabinet, characterized in that, include: The base frame and the top frame are both rectangular frames; The support link includes two support rods, the first ends of the two support rods are hinged to each other, and the second ends of the support rods are respectively hinged to the lower side of the top frame and the upper side of the base frame. The support link is provided in four sets, which are respectively installed at the four corners of the base frame and the top frame. A drive link is provided, with its two ends rotatably mounted at the hinged joint positions of the two support rods. The axial direction of the drive link is parallel to the hinged rotation axis of the support rods. Two drive links are provided, each connecting one of the two support rods. A drive frame is located between the base frame and the top frame, and both ends of the drive linkage can be slidably mounted on the drive frame; A drive screw is rotatably mounted on the drive frame. The middle parts of the drive connecting rods are threadedly connected to the drive screw. When the drive screw rotates, the two drive connecting rods slide towards each other or slide in opposite directions. A drive motor is fixedly mounted on the drive frame, and the output end of the drive motor is fixedly connected to the drive screw; An operating cabinet is fixedly installed above the top frame; There are two drive screws, which are located near the two ends of the drive connecting rod. The output end of the drive motor is connected to a single-input double-output reducer, and the drive screws are respectively connected to the output end of the reducer. The drive link is slidably mounted with a limit tube, and a limit spring is provided between both ends of the drive link and the limit tube. The limit tube is threadedly connected to the drive screw.

2. The user-friendly biosafety cabinet according to claim 1, characterized in that: An auxiliary connecting rod is hinged to the middle of the support rod, and the end of the auxiliary connecting rod away from the support rod is hinged to the upper side of the drive frame.

3. The user-friendly biosafety cabinet according to claim 1, characterized in that: The drive motor is electrically connected to a start switch, which is mounted on the base frame.

4. The user-friendly biosafety cabinet according to claim 3, characterized in that: The base frame is rotatably mounted with a pedal, the pedal's rotation shaft is located in the middle of the pedal, and the start switch includes a forward and reverse switch, which are located at both ends of the pedal, respectively.

5. A user-friendly biosafety cabinet according to claim 1, characterized in that: The underframe is equipped with universal wheels with brakes.

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