A foldable biosafety cabinet

Abstract

The present invention provides a foldable biosafety cabinet, which is a product that provides a highly clean operation environment for fields such as biopharmaceuticals and scientific research experiments. A foldable biosafety cabinet includes a cabinet body that can be embedded in a wall, the cabinet body having a return air duct and a supply air duct; two first rotating shafts, the two first rotating shafts are rotatably arranged on the cabinet body and are parallel to each other; two baffles, the two baffles are fixed on the two first rotating shafts and can rotate around the axis of the first rotating shaft; a placement plate, the placement plate is hinged on the cabinet body and is located between the two first rotating shafts, and the rotation axis of the placement plate is perpendicular to the axis of the first rotating shaft; a first transmission assembly, the first transmission assembly connects the two baffles and the placement plate, so that the placement plate and the two baffles can move synchronously and switch between a folded state and an unfolded state.

Description

Technical Field

[0001] The present invention belongs to the technical field of biopharmaceuticals and their scientific research experiments, and particularly relates to a foldable biological safety cabinet. Background Art

[0002] Traditional biological safety cabinets generally have an integral structure, with a clean air source introduced at the rear of the cabinet body and an outlet for discharging air.

[0003] Biological laboratories are costly to build, have limited space, and are equipped with a large number of devices. General biological safety cabinets are large in size and occupy a lot of space. Therefore, there is an urgent need to design a safety cabinet that can be opened or folded according to actual needs and make rational use of space. Summary of the Invention

[0004] The object of the present invention is to address the above problems existing in the prior art and propose a foldable biological safety cabinet, which has the characteristics of being able to be folded up and reducing the occupied space.

[0005] The object of the present invention can be achieved by the following technical solutions:

[0006] A foldable biological safety cabinet, characterized by comprising

[0007] A cabinet body that can be embedded in a wall, the cabinet body having a return air duct and a supply air duct;

[0008] Two first rotating shafts, the two first rotating shafts being rotatably provided on the cabinet body and being parallel to each other;

[0009] Two baffle plates, the two baffle plates being fixed on the two first rotating shafts and being able to rotate around the axis of the first rotating shaft;

[0010] A storage plate, the storage plate being hinged on the cabinet body and located between the two first rotating shafts, the rotation axis of the storage plate being perpendicular to the axis of the first rotating shaft;

[0011] A first transmission assembly, the first transmission assembly connecting the two baffle plates and the storage plate, so that the storage plate and the two baffle plates can move synchronously and switch between a folded state and an unfolded state;

[0012] In the folded state, the two baffle plates are in the same plane and the storage plate is located between the baffle plates and the inner wall of the cabinet body;

[0013] In the unfolded state, the two baffle plates are in a parallel state and the storage plate is perpendicular to the two baffle plates, the storage plate is in a horizontal state, and the two baffle plates define an operation space.

[0014] In the above-mentioned foldable biological safety cabinet, the first transmission assembly includes

[0015] A second rotating shaft, which is rotatably arranged on the cabinet body, and the second rotating shaft is perpendicular to the first rotating shaft;

[0016] Two first helical gears, which are respectively fixed at both ends of the second rotating shaft;

[0017] Two second helical gears, which are respectively coaxially connected to the two first rotating shafts, and the two second helical gears are respectively meshed with the two first helical gears;

[0018] A connecting rod assembly, which connects the second rotating shaft and the storage plate so that the storage plate and the second rotating shaft move synchronously.

[0019] In the above-mentioned folding biosafety cabinet, the connecting rod assembly includes

[0020] A first connecting rod, which is fixed on the lower surface of the storage plate, and a guiding sliding hole is provided on the first connecting rod;

[0021] A second connecting rod, one end of which is hinged on the cabinet body, the other end of the second connecting rod is provided with a connecting part, the connecting part is slidably arranged in the guiding sliding hole, and the second connecting rod can rotate around the axis of the connecting part;

[0022] A third connecting rod, one end of which is hinged to the second connecting rod;

[0023] A fourth connecting rod, one end of which is hinged to the other end of the third connecting rod, and the other end of the fourth connecting rod is fixedly connected to the second rotating shaft.

[0024] In the above-mentioned folding biosafety cabinet, the folding biosafety cabinet further includes an air valve for opening or closing the return air duct, and the air valve includes

[0025] A perforated plate, which is fixedly connected to the cabinet body and closes the air supply duct;

[0026] A shielding plate, which is slidably connected to the perforated plate and can move along a first direction, and the shielding plate has a through hole corresponding to the perforated plate, and the shielding plate is connected to one of the first rotating shafts through a second transmission component so that the shielding plate and the first rotating shaft operate synchronously, so that the mesh holes of the perforated plate are closed or opened.

[0027] In the above-mentioned folding biosafety cabinet, the second transmission component includes

[0028] A first connecting piece, which is fixedly connected to the first rotating shaft;

[0029] The first pull rod, one end of the first pull rod is connected to the shielding plate;

[0030] The first connecting rod, one end of the first connecting rod is hingedly connected to the first connecting member, and the other end is hingedly connected to the first pull rod.

[0031] In the above-mentioned foldable biosafety cabinet, the foldable biosafety cabinet further includes a louver structure, the louver structure is arranged at the return air duct, the louver structure includes a plurality of fan blades capable of synchronously rotating, the fan blades are connected to the first rotating shaft through a third transmission assembly, and the fan blades rotate synchronously with the first rotating shaft, so that the fan blades can close the air supply duct or form a gap between adjacent fan blades to communicate with the air supply duct.

[0032] In the above-mentioned foldable biosafety cabinet, a connecting shaft is provided at one end of the fan blade,

[0033] The third transmission assembly includes

[0034] The second connecting member, the second connecting member is fixedly connected to the first rotating shaft;

[0035] The second connecting rod, one end of the second connecting rod is hingedly connected to the second connecting member;

[0036] The second pull rod, one end of the second pull rod is hingedly connected to the other end of the second connecting rod;

[0037] A plurality of first swing members, the swing members are fixed on the side wall of the connecting shaft,

[0038] The first transmission rod, the first transmission rod is rotatably connected to the ends of all swing members away from the connecting shaft;

[0039] The gear, the gear is rotatably arranged on the frame of the louver structure,

[0040] The rack, the rack is fixed on the other end of the second pull rod and meshes with the gear;

[0041] The second transmission rod, one end of the second transmission rod is hinged on the gear, and the other end is hinged on The first drive rod on.

[0042] In the above-mentioned foldable biosafety cabinet, a receiving cavity is provided on the cabinet body. In the folded state, the two baffles and the placing plate can be hidden in the receiving cavity.

[0043] In the above-mentioned foldable biosafety operation cabinet, the foldable biosafety operation cabinet also includes two upper rolling curtain devices and lower rolling curtain devices arranged at the upper and lower ends of the two partitions, and a guide groove is opened along the outer edge of the baffle; the downward rolling curtain device has a first curtain and a first guide rod connected to the first curtain, and the upper rolling curtain device has a second curtain and a second guide rod connected to the second curtain;

[0044] Both ends of the first guide rod and the second guide rod have guide parts, and the guide parts can be inserted into the guide groove and slide along the guide groove;

[0045] The first guide rod can be moved at least to a height not lower than the storage plate, and the first curtain, the baffle plate, and the inner wall of the cabinet form a ventilation space connected to the return air duct;

[0046] The second curtain is made of transparent material.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] In the present invention, the two baffles are connected to the storage plate through the first transmission assembly. When the storage plate or the baffle is moved, the storage plate and the baffle can be closed synchronously. When the storage plate is flipped downward, the two baffles can also be flipped inward at the same time, thereby achieving synchronous closure and facilitating user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a three-dimensional structural schematic diagram of the present application;

[0050] Figure 2 It is a front view structural schematic diagram of the present application;

[0051] Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure at the AA position;

[0052] Figure 4 It is a structural schematic diagram in the first position in this application;

[0053] Figure 5 yes Figure 2 A schematic diagram of a cross-sectional structure at the middle BB position;

[0054] Figure 6 It is a schematic diagram of two structures at the mesh plate in this application;

[0055] Figure 7 It is a schematic diagram of the structure in which the magnetic guide rods in the two rolling curtain devices in the present application are attached together;

[0056] Figure 8It is a schematic diagram of the open part of the upper rolling curtain device in this application;

[0057] Figure 9 It is a schematic diagram of the transmission structure of the shutter structure in this application;

[0058] Figure 10 It is another schematic diagram of the transmission structure of the shutter structure in this application.

[0059] Figure 11 Another schematic diagram of the open part of the upper rolling curtain device in this application;

[0060] In the figure,

[0061] 2. Cabinet body; 21. Return air duct; 22. Supply air duct; 23. Accommodation cavity;

[0062] 3. First rotating shaft;

[0063] 4. Baffle; 41. Guide groove;

[0064] 5. Storage board;

[0065] 6. First transmission assembly; 61. Second rotating shaft; 62. First helical gear; 63. Second helical gear; 64. Link assembly; 641. First link; 6411. Guide sliding hole; 642. Second link; 6421. Connection part; 643. Third link; 644. Fourth link;

[0066] 7. Mesh plate; 71. Mesh holes;

[0067] 8. Shading baffle; 81. Through holes;

[0068] 9. Second transmission assembly; 91. First connecting piece; 92. First pull rod; 93. First connecting rod;

[0069] 10. Shutter structure; 101. Fan blades; 1011. Connecting shaft; 102. Third transmission assembly; 1021. Second connecting piece; 1022. Second connecting rod; 1023. Second pull rod; 1024. First swinging piece; 1025. First transmission rod; 1026. Gear; 1027. Rack; 1028. Second transmission rod;

[0070] 11. Lower rolling curtain device; 111. First curtain; 1111. First guide rod;

[0071] 12. Upper rolling curtain device; 121. Second curtain; 1211. Second guide rod. Detailed implementation manners

[0072] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0073] Figure 3 In Figure a, it shows a schematic diagram where the mesh holes 71 of the mesh plate 7 are aligned with the through holes 81 of the shielding plate 8, and in Figure b, it shows a schematic diagram where the mesh plate 7 will close the through holes 81 of the shielding plate 8.

[0074] As Figures 1 to 11 shown, a foldable biosafety cabinet includes a cabinet body 2 that can be embedded in a wall, two first rotating shafts 3, two baffle plates 4, a storage plate 5, and a first transmission assembly 6. The cabinet body 2 has a return air duct 21 and a supply air duct 22; the two first rotating shafts 3 are rotatably arranged on the cabinet body 2 and are parallel to each other; the two baffle plates 4 are fixed on the two first rotating shafts 3 and can rotate around the axis of the first rotating shaft 3; the storage plate 5 is hinged on the cabinet body 2 and is located between the two first rotating shafts 3, and the rotation axis of the storage plate 5 is perpendicular to the axis of the first rotating shaft 3; the first transmission assembly 6 connects the two baffle plates 4 and the storage plate 5 so that the storage plate 5 and the two baffle plates 4 can move synchronously and switch between a folded state and an unfolded state; in the folded state, the two baffle plates 4 are in the same plane and the storage plate 5 is located between the baffle plate 4 and the inner wall of the cabinet body 2; in the unfolded state, the two baffle plates 4 are in a parallel state and the storage plate 5 is perpendicular to the two baffle plates 4, the storage plate 5 is in a horizontal state, and the two baffle plates 4 define an operation space.

[0075] In the present invention, the cabinet body 2 is embedded in the wall. In the folded state, the two baffle plates 4 and the storage plate 5 are in a retracted state, and the protruding part relative to the wall surface can be hidden, thereby reducing the floor area and not blocking people's line of sight and usage space when not in use; in the unfolded state, the two baffle plates 4 and the storage plate 5 are opened, so as to roughly form an operation space through the two baffle plates 4. Items can be stored on the storage plate 5. The supply air duct 22 is connected to a clean air source, and the return air duct 21 is connected to the outside. The substances in the operation space are taken out through the return air duct 21 by inputting clean air.

[0076] The clean air sent by the supply air duct 22 is input through a clean air conditioner;

[0077] The air discharged from the return air duct 21 returns to the clean air conditioner or the room through the return air duct 21;

[0078] In the present invention, the two baffles 4 are connected to the storage plate 5 through the first transmission assembly 6. When the storage plate 5 or the baffle 4 is moved, the storage plate 5 and the baffle 4 can be closed synchronously. When the storage plate 5 is flipped downward, the two baffles 4 can also be flipped inward at the same time, thereby achieving synchronous closure and facilitating user use.

[0079] In the present invention, the folded state refers to the state when the foldable biosafety operating cabinet is fully folded. Figure 4 As shown in the figure, the unfolded state refers to the state in which the foldable biosafety operation cabinet is opened and can be used, such as Figure 1 shown.

[0080] In the present invention, the baffle 4 is fixedly connected to the first rotating shaft 3 via two connecting members.

[0081] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, the first transmission assembly 6 includes a second rotating shaft 61, two first bevel gears 62, two second bevel gears 63 and a connecting rod assembly 64. The second rotating shaft 61 is rotatably set on the cabinet 2, and the second rotating shaft 61 and the first rotating shaft 3 are perpendicular to each other; the two first bevel gears 62 are respectively fixed at both ends of the second rotating shaft 61; the two second bevel gears 63 are respectively coaxially connected to the two first rotating shafts 3, and the two second bevel gears 63 are respectively meshed with the two first bevel gears 62; the connecting rod assembly 64 connects the second rotating shaft 61 and the storage plate 5, so that the storage plate 5 and the second rotating shaft 61 move synchronously.

[0082] In the present application, the baffle 4 is flipped, and the baffle 4 drives the first rotating shaft 3 to rotate. The first rotation drives the two second bevel gears 63 to rotate. The two second bevel gears 63 respectively drive the two first bevel gears 62 to rotate, thereby driving the second rotating shaft 61 to rotate. The second rotating shaft 61 drives the storage plate 5 to flip through the connecting rod assembly 64. When the baffle 4 flips inward, the storage plate 5 will also flip downward until the two baffles 4 flip to approximately the same plane.

[0083] Through this structure, the door panel and the storage plate 5 can be opened or closed at the same time, and the user can easily open the baffle 4 and the storage plate 5 at the same time, so that the customer can operate it at one time with high efficiency.

[0084] It is formed by the meshing of the first bevel gear 62 and the second bevel gear 63. It is relatively stable during the linkage process and has relatively high precision, and can reach the preset position every time it is opened or closed.

[0085] Specifically, Figure 1 ,Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown in Figure 8 , the connecting rod assembly 64 includes a first connecting rod 641, a second connecting rod 642, a third connecting rod 643, and a fourth connecting rod 644. The first connecting rod 641 is fixed to the lower surface of the storage plate 5, and a guiding sliding hole 6411 is provided on the first connecting rod 641. One end of the second connecting rod 642 is hinged to the cabinet body 2, and a connecting portion 6421 is provided at the other end of the second connecting rod 642. The connecting portion 6421 is slidably disposed in the guiding sliding hole 6411, and the second connecting rod 642 can rotate around the axis of the connecting portion 6421. One end of the third connecting rod 643 is hinged to the second connecting rod 642. One end of the fourth connecting rod 644 is hinged to the other end of the third connecting rod 643, and the other end of the fourth connecting rod 644 is fixedly connected to the second rotating shaft 61.

[0086] In the present invention, the first connecting rod 641 is disposed along the width direction of the storage plate 5, and the guiding sliding hole 6411 on the first connecting rod 641 is also disposed along the width direction of the storage plate 5.

[0087] When it is necessary to close the storage plate 5, the second rotating shaft 61 rotates, driving the fourth connecting rod 644 to flip away from the cabinet body 2 side, then driving the third connecting rod 643 to move downward, driving the second connecting rod 642 to rotate along the end connected to the cabinet body 2 through the third connecting rod 643, and the connecting portion 6421 on the second connecting rod slides along the guiding sliding hole 6411, so that the storage plate 5 gradually flips downward.

[0088] In this embodiment, there are two sets of connecting rod assemblies 64, which are respectively disposed on both sides of the storage plate 5.

[0089] Specifically, as Figures 1 - 6 shown, the foldable biosafety cabinet further includes a gas valve for opening or closing the air supply duct 22. The gas valve includes a mesh plate 7 and a shielding plate 8. The mesh plate 7 is fixedly connected to the cabinet body 2 and closes the air supply duct 22. The shielding plate 8 is slidably connected to the mesh plate 7 and can move along the first direction, and the shielding plate 8 has a through hole 81 corresponding to the mesh plate 7. The shielding plate 8 is connected to one of the first rotating shafts 3 through a second transmission assembly 9, so that the shielding plate 8 rotates synchronously with the first rotating shaft 3, so that the mesh holes 71 of the mesh plate 7 are closed or opened.

[0090] In the present invention, during the rotation of the first rotating shaft 3, the first rotating shaft 3 drives the shielding plate 8 to move along the first direction through the second transmission assembly 9. In the folded state, the shielding plate 8 completely shields the mesh holes 71 of the mesh plate 7. In the unfolded state, the through hole 81 on the shielding plate 8 communicates with the mesh holes 71 on the mesh plate 7.

[0091] An efficient filtration structure is also provided at the air supply duct 22. The efficient filtration structure is of the prior art.

[0092] This action is carried out in coordination when the turning baffle 4 or the placing plate 5 is turned. Specifically, the second transmission assembly 9 includes a first connecting member 91, a first pull rod 92 and a first connecting rod 93. The first connecting member 91 is fixedly connected to the first rotating shaft 3; one end of the first pull rod 92 is connected to the shielding baffle 8; one end of the first connecting rod 93 is hingedly connected to the first connecting member 91, and the other end is hingedly connected to the first pull rod 92.

[0093] When the first rotating shaft 3 rotates, it drives the first connecting member 91 to rotate. The first connecting member 91 undergoes displacement, causing the end of the first connecting member 91 far from the first rotating shaft 3 to move and displace. And this end is connected to the first pull rod 92, so the first pull rod 92 also moves accordingly, and the first pull rod 92 drives the shielding baffle 8 to move.

[0094] In this embodiment, the shielding baffle 8 is arranged between the mesh plate 7 and the cabinet body 2.

[0095] Specifically, as Figure 1 , Figure 9 , Figure 10 shown, the foldable biosafety cabinet further includes a louver structure 10. The louver structure 10 is arranged at the return air duct 21. The louver structure 10 includes a plurality of fan blades 101 that can rotate synchronously. The fan blades 101 are connected to the first rotating shaft 3 through a third transmission assembly 102. The fan blades 101 rotate synchronously with the first rotating shaft 3 so that the fan blades 101 can close the return air duct 21 or form a gap between adjacent fan blades 101 to communicate with the return air duct 21.

[0096] When the first rotating shaft 3 rotates, it can drive the fan blades 101 in the louver structure 10 to move through the third transmission assembly 102. In the folded state, all the fan blades 101 rotate and close the return air duct 21, while in the unfolded state, the fan blades 101 rotate and form a gap between adjacent fan blades 101, and the gap communicates with the return air duct 21.

[0097] Generally, a fan is arranged outside the return air duct 21 for air extraction. To form a unidirectional air flow, clean air enters from the air supply duct 22 and then is extracted from the return air duct 21, without causing leakage. This action is carried out in coordination when the turning baffle 4 or the placing plate 5 is turned.

[0098] Specifically, as Figure 9 , Figure 10As shown, one end of the fan blade 101 is provided with a connecting shaft 1011. The third transmission assembly 102 includes a second connecting member 1021, a second connecting rod 1022, a second pull rod 1023, a plurality of first swing members 1024, a first transmission rod 1025, a gear 1026, a rack 1027, and a second transmission rod 1028. The second connection is fixedly connected to the first rotating shaft 3; one end of the second connecting rod 1022 is hinged to the second connecting member 1021; one end of the second pull rod 1023 is hinged to the other end of the second connecting rod 1022; the swing member is fixed on the side wall of the connecting shaft 1011, and the first transmission rod 1025 is rotatably connected to the ends of all swing members away from the connecting shaft 1011; the gear 1026 is rotatably arranged on the frame of the louver structure 10, and the rack 1027 is fixed to the other end of the second pull rod 1023 and meshes with the gear 1026; one end of the second transmission rod 1028 is hinged to the gear 1026, and the other end is hinged to the first transmission rod 1025. One end of the second transmission rod 1028 is eccentrically hinged to the gear 1026.

[0099] When the first rotating shaft rotates, it drives the second connecting member 1021 to rotate. The second connecting member 1021 drives the second connecting rod 1022 to swing. The second connecting rod 1022 drives the second pull rod 1023 to move. The other end of the second pull rod 1023 drives the rack 1027 to move. The rack 1027 drives the gear 1026 to rotate. The gear 1026 drives one end of the second transmission rod 1028 to move. One end of the second transmission rod 1028 is eccentrically arranged on the gear 1026. The second transmission rod 1028 drives the first transmission rod 1025 to move up and down. The second transmission rod 1028 drives the swing member to swing up and down, thereby driving the fan blade 101 to turn up and down, so as to control the opening or closing of the fan blade 101.

[0100] In this embodiment, the first transmission rod 1025 can be slightly deformed.

[0101] In the folded state, the fan blade 101 is in a closed state. In the unfolded state, the fan blade 101 is in an open state.

[0102] This design enables the fan blade 101 to automatically close when the foldable biosafety cabinet is not in use, so that air cannot flow from the louver structure 10.

[0103] Specifically, the cabinet body 2 is provided with a receiving cavity 23. In the folded state, the two baffles 4 and the placement plate 5 can be hidden in the receiving cavity 23.

[0104] This design enables the outer surface of the baffle 4 to be substantially in the same plane as the outer surface of the cabinet body 2 when the baffle 4 is turned inward, so as to further reduce the floor space.

[0105] Specifically, as Figure 7, Figure 8 As shown in Figure 8 , the foldable biosafety cabinet further includes an upper rolling curtain device 12 and a lower rolling curtain device 11 disposed at the upper and lower ends of two partitions. A guide groove 41 is formed along the outer edge of the baffle 4; the lower rolling curtain device 11 has a first curtain 111 and a first guide rod 1111 connected to the first curtain 111, and the upper rolling curtain device 12 has a second curtain 121 and a second guide rod 1211 connected to the second curtain 121;

[0106] Both ends of the first guide rod 1111 and the second guide rod 1211 have guide portions, and the guide portions can be inserted into the guide groove 41 and slide along the guide groove 41;

[0107] The first guide rod 1111 can move at least to a position not lower than the height of the placement plate 5, and the first curtain 111 forms a ventilation space communicating with the return air duct 21 with the inner wall of the baffle 4 and the cabinet body 2; the second curtain 121 is made of a transparent material.

[0108] In addition, the first guide rod 1111 and the second guide rod 1211 have magnetic portions, and the first guide rod 1111 and the second guide rod 1211 can be magnetically connected. The first guide rod 1111 and the second guide rod 1211 can be magnetically connected after contact, so as to achieve better sealing.

[0109] After the two baffles 4 are completely opened, the placement plate 5 is in a horizontal state. The first curtain 111 and the second curtain 121 in the lower rolling curtain device 11 and the upper rolling curtain device 12 can be pulled out. The guide portions at both ends of the first guide rod 1111 of the first curtain 111 can be inserted into the guide groove 41. The first guide rod 1111 can be manually pulled and pulled to the middle position of the baffle 4 until the first guide rod 1111 is pulled to the same height as the placement plate 5. After the first guide rod 1111 and the second guide rod 1211 of the upper rolling curtain device 12 and the lower rolling curtain device 11 come into contact and are magnetically attracted, the control space can be roughly closed. When an item needs to be placed on the placement plate 5 or taken out from the placement plate 5, only the second guide rod 1211 of the upper rolling curtain device 12 above needs to be manually moved upward. The second guide rod 1211 can stop at any position in the guide groove 41 of the baffle 4, and the position of the second guide rod 1211 can be adjusted according to actual needs. Moreover, after the guide portions at both ends of the first guide rod 1111 and the second guide rod 1211 enter the guide grooves 41 of the two baffles 4, the first guide rod 1111 and the second guide rod 1211 can serve as supports to prevent the two baffles 4 from turning inward, so that heavier objects can be placed on the placement plate 5.

[0110] When the baffle 4 and the placement plate 5 need to be reset to the folded state, the guide rods on the two rolling curtain devices need to be completely reset to the initial position. The initial position refers to the state where the curtain in the rolling curtain device is completely wound inside.

[0111] The second curtain 121 made of a transparent material enables users to conveniently observe the state of internal objects. The transparent material is, for example, transparent plastic.

[0112] The lower rolling curtain device 11 and the upper rolling curtain device 12 are prior arts. The first curtain 111 and the second curtain 121 can be manually pulled out and can be automatically wound up when not affected by external forces. The rolling curtain device 11 further includes a box body and a winding shaft for winding the rolling curtain. One end of the winding shaft is provided with a torsion spring, and one end of the rolling curtain is connected to the shaft. When the rolling curtain is not affected by external forces, the shaft will automatically wind up the rolling curtain through the torsion spring.

[0113] In this embodiment, a notch communicating with the guide groove 41 is formed in the baffle 4. When the rolling curtain 111 is retracted, the guiding portions of the first guide rod 1111 and the second guide rod 1211 can move out of the notch of the guide groove 41. Thus, during the inward flipping process of the baffle 4, the guiding portion can disengage from the guide groove 41. When the baffle 4 flips outward, the guiding portion will re-enter the guide groove 41 from the notch position.

[0114] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0115] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes the A scenario, or the B scenario, or the scenario where both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0116] The above components are all common standard parts or parts known to those skilled in the art, and their structures and principles can all be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0117] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A foldable biosafety cabinet, characterized in that, it includes a cabinet body (2) that can be embedded in a wall, and the cabinet body (2) has a return air duct (21) and a supply air duct (22); two first rotating shafts (3), and the two first rotating shafts (3) are rotatably arranged on the cabinet body (2) and are parallel to each other; two baffle plates (4), and the two baffle plates (4) are fixed on the two first rotating shafts (3) and can rotate around the axis of the first rotating shaft (3); a placement board (5), the placement board (5) is hinged on the cabinet body (2) and is located between the two first rotating shafts (3), and the rotation axis of the placement board (5) is perpendicular to the axis of the first rotating shaft (3); a first transmission assembly (6), the first transmission assembly (6) connects the two baffle plates (4) and the placement board (5) so that the placement board (5) and the two baffle plates (4) can move synchronously and switch between a folded state and an unfolded state; In the folded state, the two baffle plates (4) are in the same plane and the placement board (5) is located between the baffle plate (4) and the inner wall of the cabinet body (2); In the unfolded state, the two baffle plates (4) are in a parallel state and the placement board (5) is perpendicular to the two baffle plates (4), the placement board is in a horizontal state, and the two baffle plates (4) define an operation space; The first transmission assembly (6) includes a second rotating shaft (61), the second rotating shaft (61) is rotatably arranged on the cabinet body (2), and the second rotating shaft (61) is perpendicular to the first rotating shaft (3); two first helical gears (62), and the two first helical gears (62) are respectively fixed at both ends of the second rotating shaft (61); two second helical gears (63), the two second helical gears (63) are respectively coaxially connected to the two first rotating shafts (3), and the two second helical gears (63) are respectively meshed with the two first helical gears (62); a connecting rod assembly (64), the connecting rod assembly (64) connects the second rotating shaft (61) and the placement board (5) so that the placement board (5) and the second rotating shaft (61) move synchronously; The connecting rod assembly (64) includes a first connecting rod (641), the first connecting rod (641) is fixed on the lower surface of the placement board (5), and a guiding sliding hole (6411) is provided on the first connecting rod (641); a second connecting rod (642), one end of the second connecting rod (642) is hinged on the cabinet body (2), the other end of the second connecting rod (642) is provided with a connecting portion (6421), the connecting portion (6421) is slidably arranged in the guiding sliding hole (6411), and the second connecting rod (642) can rotate around the axis of the connecting portion (6421); a third connecting rod (643), one end of the third connecting rod (643) is hinged to the second connecting rod (642); a fourth connecting rod (644), one end of the fourth connecting rod (644) is hinged to the other end of the third connecting rod (643), and the other end of the fourth connecting rod (644) is fixedly connected to the second rotating shaft (61).

2. The foldable biosafety cabinet according to claim 1, characterized in that, it further comprises an air valve for opening or closing the air supply duct 22, and the air valve comprises a perforated plate (7), the perforated plate (7) is fixedly connected to the cabinet body (2) and blocks the air supply duct (22); a shielding plate (8), the shielding plate (8) is slidably connected to the perforated plate (7) and can move along a first direction, and the shielding plate (8) has a through hole (81) corresponding to the perforated plate (7), and the shielding plate (8) is connected to one of the first rotating shafts (3) through a second transmission component (9), and the shielding plate (8) rotates synchronously with the first rotating shaft (3) so as to close or open the mesh holes (71) of the perforated plate (7).

3. The foldable biosafety cabinet according to claim 2, characterized in that, the second transmission component (9) comprises a first connecting member (91), the first connecting member (91) is fixedly connected to the first rotating shaft (3); a first pull rod (92), one end of the first pull rod (92) is connected to the shielding plate (8); a first connecting rod (93), one end of the first connecting rod (93) is hingedly connected to the first connecting member (91), and the other end is hingedly connected to the first pull rod (92).

4. The foldable biosafety cabinet according to claim 1, characterized in that, it further comprises a louver structure (10), the louver structure (10) is arranged at the return air duct (21), the louver structure (10) comprises a plurality of fan blades (101) capable of rotating synchronously, and the fan blades (101) are connected to the first rotating shaft (3) through a third transmission component (102), and the fan blades (101) rotate synchronously with the first rotating shaft (3) so as to block the return air duct (21) or form a gap between adjacent fan blades (101) and communicate with the return air duct (21).

5. The foldable biosafety cabinet according to claim 4, characterized in that, one end of the fan blade (101) is provided with a connecting shaft (1011), the third transmission component (102) comprises a second connecting member (1021), the second connecting member (1021) is fixedly connected to the first rotating shaft (3); a second connecting rod (1022), one end of the second connecting rod (1022) is hingedly connected to the second connecting member (1021); a second pull rod (1023), one end of the second pull rod (1023) is hingedly connected to the other end of the second connecting rod (1022); a plurality of first swinging members (1024), the swinging members are fixed on the side wall of the connecting shaft (1011), a first transmission rod (1025), the first transmission rod (1025) is rotationally connected to the ends of all the swinging members away from the connecting shaft (1011); a gear (1026), the gear (1026) is rotatably arranged on the frame of the louver structure (10), A rack (1027), the rack (1027) being fixed to the other end of the second pull rod (1023) and meshing with the gear (1026); A second transmission rod (1028), one end of the second transmission rod (1028) being hinged to the gear (1026) and the other end being hinged to the first transmission rod (1025).

6. The foldable biosafety cabinet according to claim 1, characterized in that a receiving cavity (23) is provided on the cabinet body (2), and in the folded state, the two baffles (4) and the placement board (5) can be hidden in the receiving cavity (23).

7. The foldable biosafety cabinet according to claim 1, characterized in that the foldable biosafety cabinet further includes an upper rolling curtain device (12) and a lower rolling curtain device (11) provided at the upper and lower ends of the two baffles 4, and a guide groove (41) is formed along the outer edge of the baffle (4); the lower rolling curtain device (11) has a first curtain (111) and a first guide rod (1111) connected to the first curtain (111), and the upper rolling curtain device (12) has a second curtain (121) and a second guide rod (1211) connected to the second curtain (121); both ends of the first guide rod (1111) and the second guide rod (1211) have guide parts, and the guide parts can be inserted into the guide groove (41) and slide along the guide groove (41); the first guide rod (1111) can move at least to a position not lower than the height of the placement board (5), and the first curtain (111) and the inner walls of the baffle (4) and the cabinet body (2) form a ventilation space communicating with the return air duct (21); the second curtain (121) is made of a transparent material.

8. The foldable biosafety cabinet according to claim 7, characterized in that the first guide rod (1111) and the second guide rod (1211) have magnetic parts, and the first guide rod (1111) and the second guide rod (1211) can be magnetically connected.

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