Feedback structure and biosafety cabinet

Abstract

The embodiment of the application provides a feedback structure and a biological safety cabinet, and relates to the technical field of feedback structures.The feedback structure comprises a cover plate, a glass window, a tactile feedback component and a visual feedback component, the cover plate is arranged on a cabinet body of the biological safety cabinet, the glass window is slidably arranged relative to the cover plate, the tactile feedback component is arranged on the cover plate, and the visual feedback component is used for being triggered by the tactile feedback component to generate visual feedback when the glass window moves to a working position.The feedback structure can move together with the glass window during use, and when the glass window moves to the working position, the tactile feedback component can trigger the visual feedback component, so that the visual feedback component generates visual feedback, and it is ensured that the glass window has reached the working position can be accurately known.The feedback structure can accurately feed back when the glass window reaches the working position, and is more accurate and convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of feedback structure, and in particular, relates to a feedback structure and a biological safety cabinet. BACKGROUND

[0002] The biological safety cabinet is a box type air purification negative pressure safety device capable of preventing some biological particles containing danger or unknownness from emitting aerosol during experimental operation and processing. The biological safety cabinet in the prior art comprises a cabinet body and a glass window, and a user opens or closes the cabinet body by pushing the glass window. When the glass window reaches the working position, the user needs accurate feedback, so a feedback structure is generally arranged on the cabinet body.

[0003] The feedback structure in the prior art has the problem of inaccurate feedback. SUMMARY

[0004] The present application provides a feedback structure and a biological safety cabinet, which can accurately feedback when the glass window reaches the working position, and are more accurate and convenient to use.

[0005] The embodiments of the present application can be implemented as follows:

[0006] The embodiments of the present application provide a feedback structure, which comprises:

[0007] a cover plate;

[0008] a glass window, which is slidably arranged relative to the cover plate;

[0009] a tactile feedback member, which is arranged on the cover plate;

[0010] a visual feedback member, which is used to be triggered by the tactile feedback member to generate visual feedback when the glass window moves to the working position.

[0011] Optionally, the tactile feedback member comprises a first working unit, the first working unit is connected with the glass window, and the first working unit is used to contact the cover plate to trigger the visual feedback member when the glass window moves to the working position.

[0012] Optionally, the first working unit comprises a fixed plate, an execution plate and a fixed rod, the fixed plate and the execution plate are elastically rotatably connected through the fixed rod, the fixed plate is connected with the glass window, and the fixed plate is used to move along with the glass window to drive the execution plate to move, and the execution plate contacts the cover plate to trigger the visual feedback member when the glass window moves to the working position.

[0013] Optionally, the first processing unit further comprises a first torsion spring sleeved on the fixed rod, and the execution plate is configured to rotate relative to the fixed rod under the elastic force of the first torsion spring, so that the execution plate contacts the cover plate to trigger the visual feedback element.

[0014] Optionally, the execution plate comprises a plate body and a first induction plate, the plate body is elastically rotatably connected with the fixed rod, and the first induction plate is arranged on the top surface of the plate body, the first induction plate is electrically connected with the visual feedback element, and the first induction plate is configured to contact the cover plate when the plate body rotates relative to the fixed rod, so that the visual feedback element generates tactile feedback.

[0015] Optionally, the cover plate is provided with a reserved hole, the visual feedback element is mounted in the reserved hole, and the plate body rotates relative to the fixed rod in the reserved hole under the elastic force of the first torsion spring when the glass window moves to the working position, so that the first induction plate contacts the top wall of the reserved hole to trigger the visual feedback element to generate tactile feedback.

[0016] Optionally, the visual feedback element comprises a human-computer interface and a first indicator light, the human-computer interface is mounted in the reserved hole, the first indicator light is electrically connected with the human-computer interface, and the first indicator light is configured to be bright when the first induction plate contacts the top wall of the reserved hole.

[0017] Optionally, the tactile feedback element further comprises a second processing unit, the human-computer interface is provided with a spring hole, the second processing unit is elastically arranged in the spring hole, and the second processing unit is configured to extend out of the spring hole when the glass window reaches the working position, so that the second processing unit abuts against the first processing unit.

[0018] Optionally, the top wall of the reserved hole is provided with a second induction plate, the spring hole is provided with a de-energized electromagnet, the de-energized electromagnet is configured to fix the second processing unit in the elastic hole, and the de-energized electromagnet is energized and demagnetized when the second induction plate contacts the first induction plate, so that the second processing unit extends out of the spring hole, and the second processing unit abuts against the first processing unit.

[0019] The embodiment also provides a biosafety cabinet comprising a cabinet body and a feedback structure, and the glass window is slidably mounted on the cabinet body to close or open the cabinet body.

[0020] The feedback structure and the biosafety cabinet have the following beneficial effects, for example:

[0021] The feedback structure comprises a cover plate, a glass window, a tactile feedback piece and a visual feedback piece. The cover plate is arranged on the cabinet body of the biosafety cabinet. The glass window is slidably arranged relative to the cover plate. The tactile feedback piece is arranged on the cover plate. The visual feedback piece is triggered by the tactile feedback piece when the glass window moves to the working position to generate visual feedback. In use, the tactile feedback piece can move together with the glass window. When the glass window moves to the working position, the tactile feedback piece can trigger the visual feedback piece to generate visual feedback, so that it can be accurately known that the glass window has reached the working position. The feedback structure can accurately feedback when the glass window reaches the working position, and is more accurate and convenient to use.

[0022] The biosafety cabinet comprises a cabinet body and a feedback structure. The glass window is slidably arranged on the cabinet body. In use, the tactile feedback piece can move together with the glass window. When the glass window moves to the working position, the tactile feedback piece can trigger the visual feedback piece to generate visual feedback, so that it can be accurately known that the glass window has reached the working position. The feedback structure can accurately feedback when the glass window reaches the working position, and is more accurate and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The structure schematic diagram of the biosafety cabinet provided for the present embodiment;

[0025] Figure 2 The structure schematic diagram of the feedback structure provided for the present embodiment from the first perspective;

[0026] Figure 3 The structure schematic diagram of the feedback structure provided for the present embodiment from the second perspective;

[0027] Figure 4 The structure schematic diagram of the feedback structure provided for the present embodiment from the third perspective;

[0028] Figure 5 The structure schematic diagram of the visual feedback piece provided for the present embodiment from the first perspective;

[0029] Figure 6 The structure schematic diagram of the visual feedback piece provided for the present embodiment from the second perspective;

[0030] Figure 7 Structure diagram of the third perspective of the visual feedback member provided in the embodiment;

[0031] Figure 8 Structure diagram of the first perspective of the first working unit provided in the embodiment;

[0032] Figure 9 Structure diagram of the second perspective of the first working unit provided in the embodiment;

[0033] Figure 10 Structure diagram of the first perspective of the second working unit provided in the embodiment;

[0034] Figure 11 Structure diagram of the second perspective of the second working unit provided in the embodiment.

[0035] Icon: 10 - cover plate; 11 - reserved hole; 12 - second induction plate; 20 - glass window; 30 - tactile feedback member; 31 - first working unit; 311 - fixed plate; 312 - execution plate; 3121 - plate body; 3122 - first induction plate; 3123 - mounting groove; 313 - fixed rod; 314 - first torsional spring; 32 - second working unit; 321 - matching plate; 322 - connecting plate; 323 - round rod; 324 - spring; 325 - spring rod; 326 - handle; 327 - connecting hole; 328 - second torsional spring; 40 - visual feedback member; 41 - human-computer interface; 411 - spring hole; 412 - de-energized electromagnet; 413 - movable hole; 42 - first indicator light; 43 - second indicator light; 50 - spring baffle; 60 - induction block; 100 - feedback structure; 200 - cabinet body; 1000 - biological safety cabinet. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0038] It should be noted that like reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0039] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0042] A biological safety cabinet is a box-shaped air purification negative pressure safety device capable of preventing certain aerosols containing hazardous or unknown biological particles from escaping during experimental operation and processing. The biological safety cabinet in the prior art includes a cabinet body and a glass window, and a user opens or closes the cabinet body by pushing the glass window. When the glass window reaches the working position, the user needs accurate feedback, so a feedback structure is generally provided on the cabinet body.

[0043] The feedback structure in the related art has the problem of inaccurate feedback.

[0044] Please refer to Figures 1-11 The present embodiment provides a biological safety cabinet 1000, which includes a cabinet body 200 and a feedback structure 100, the feedback structure 100 is installed on the cabinet body 200 and is used to feedback the state of the cabinet body 200. The biological safety cabinet 1000 can effectively improve the above-mentioned technical problems, and can accurately feedback when the glass window 20 reaches the working position, and is more accurate and convenient to use.

[0045] Please refer to Figures 1-4 The feedback structure 100 includes a cover plate 10, a glass window 20, a tactile feedback piece 30 and a visual feedback piece 40, the cover plate 10 is used to be arranged on the cabinet body 200 of the biological safety cabinet 1000, the glass window 20 is slidably arranged relative to the cover plate 10, the tactile feedback piece 30 is arranged on the cover plate 10, and the visual feedback piece 40 is used to be triggered by the tactile feedback piece 30 when the glass window 20 moves to the working position, so as to produce visual feedback.

[0046] The glass window 20 is installed at the front of the cabinet body 200, and a user can manually push the glass window 20 along a predetermined stroke to move the glass window 20 up and down. When the glass window 20 is at the lowermost end of the test area of the cabinet body 200, the biosafety cabinet 1000 is in a closed state.

[0047] Specifically, the tactile feedback member 30 includes a first working unit 31, the first working unit 31 is connected with the glass window 20, and the first working unit 31 is used to contact the cover plate 10 when the glass window 20 moves to the working position to trigger the visual feedback member 40. This allows the user to know that the glass window 20 has reached the working position at the first time, and accurately feedback the stroke of the glass window 20.

[0048] Please refer to Figure 8 and Figure 9 and refer to Figures 2-4 The first working unit 31 includes a fixed plate 311, an execution plate 312, and a fixed rod 313. The fixed plate 311 and the execution plate 312 are elastically rotatably connected through the fixed rod 313. The fixed plate 311 is connected with the glass window 20 and is used to move with the glass window 20 to drive the execution plate 312 to move. When the glass window 20 moves to the working position, the execution plate 312 contacts the cover plate 10 to trigger the visual feedback member 40.

[0049] The fixed plate 311 is a right trapezoidal structure, and the side connected with the glass window 20 is a hypotenuse structure. The inclination angle of the hypotenuse is matched with the glass window 20, so that the top surface of the fixed plate 311 is parallel to the top surface of the cabinet body 200.

[0050] The side of the fixed plate 311 close to the execution plate 312 and the side of the execution plate 312 close to the fixed plate 311 are both provided with connecting heads, and the fixed rod 313 passes through all the connecting heads to connect the fixed plate 311 and the execution plate 312. Specifically, the connecting head is a U-shaped structure.

[0051] In this embodiment, the execution plate 312 is a cuboid structure.

[0052] Furthermore, the top surface of the execution plate 312 can be provided with a roller, and the side wall of the cover plate 10 is provided with a roller hole, and the roller can slide in the roller hole.

[0053] It needs to be explained that the first working unit 31 further comprises a first torsion spring 314 sleeved on the fixed rod 313, and the execution plate 312 is used to rotate relative to the fixed rod 313 under the elastic force of the first torsion spring 314, so that the execution plate 312 and the cover plate 10 are in contact to trigger the visual feedback piece 40. Wherein, the number of the first torsion spring 314 is multiple, and the multiple first torsion springs 314 are all sleeved on the fixed rod 313, and the two ends of the first torsion spring 314 are fixedly connected with the execution plate 312 and the fixed plate 311 respectively, and the first torsion spring 314 makes the execution plate 312 and the fixed plate 311 located on the same horizontal line through the elastic force of itself.

[0054] The fixed plate 311 is fixedly connected with the glass window 20, and the execution plate 312 and the fixed plate 311 are arranged at an angle when the glass window 20 does not reach the working position, the side wall of the execution plate 312 and the cover plate 10 are in contact, and the first torsion spring 314 is in a squeezed state. In the case that the glass window 20 is manually pushed, the fixed plate 311 moves together with the glass window 20, and the execution plate 312 slides relative to the side wall of the cover plate 10 under the driving of the fixed plate 311. During the sliding process, the friction between the execution plate 312 and the cover plate 10 can consume part of the inertia brought by the pushing of the glass window 20, prevent the glass window 20 from moving out of the working position under the action of inertia, and make the sliding more stable. At the same time, it reminds the user that the glass window 20 is about to reach the working position, so as to slow down the speed of pushing the glass window 20. In the case that the glass window 20 reaches the working position, the side wall of the execution plate 312 and the cover plate 10 are separated, the execution plate 312 rotates under the elastic force of the first torsion spring 314, until the execution plate 312 and the fixed plate 311 are located on the same horizontal line, the execution plate 312 and the cover plate 10 are in contact to produce tactile feedback, so as to trigger the visual feedback piece 40.

[0055] It also needs to be explained that the execution plate 312 comprises a plate body 3121 and a first induction plate 3122, the plate body 3121 is elastically rotatably connected with the fixed rod 313, and the first induction plate 3122 is arranged on the top surface of the plate body 3121. The first induction plate 3122 is electrically connected with the visual feedback piece 40, and the first induction plate 3122 is used to contact the cover plate 10 to trigger the visual feedback piece 40 to produce tactile feedback when the plate body 3121 rotates relative to the fixed rod 313.

[0056] Specifically, the top surface of the plate body 3121 is provided with a mounting groove 3123, and the first induction plate 3122 is mounted in the mounting groove 3123. In this embodiment, the shape of the mounting groove 3123 is matched with the shape of the first induction plate 3122.

[0057] Further, the bottom surface of the execution plate 312 is provided with an induction block 60.

[0058] Please continue to refer to Figures 2-4In the embodiment, the cover plate 10 is provided with a reserved hole 11, the visual feedback element 40 is installed in the reserved hole 11, and when the glass window 20 is moved to the working position, the plate body 3121 rotates relative to the fixed rod 313 in the reserved hole 11 by the elastic force of the first torsion spring 314, so that the first sensing plate 3122 contacts the top wall of the reserved hole 11 to trigger the visual feedback element 40 to generate tactile feedback. The reserved hole 11 penetrates through the cover plate 10, and the cross section of the reserved hole 11 is a right trapezoid.

[0059] Please refer to Figures 5-7 The visual feedback element 40 includes a human-computer interface 41 and a first indicator light 42. The human-computer interface 41 is installed in the reserved hole 11, the first indicator light 42 is electrically connected with the human-computer interface 41, and the first indicator light 42 is used to light up when the first sensing plate 3122 contacts the top wall of the reserved hole 11. In the embodiment, the first indicator light 42 emits green light to indicate that the glass window 20 reaches the working position.

[0060] Please refer to Figures 5-7 and Figures 10-11 It should be further pointed out that the tactile feedback element 30 further includes a second working unit 32, the human-computer interface 41 is provided with a spring hole 411, and the second working unit 32 is elastically arranged in the spring hole 411. The second working unit 32 is used to extend out of the spring hole 411 when the glass window 20 reaches the working position, so that the second working unit 32 abuts against the first working unit 31. The spring hole 411 is provided with a spring stop plate 50. The spring stop plate 50 is used to resist the second working unit 32. After the second working unit 32 abuts against the first working unit 31, the spring stop plate 50 can prevent the execution plate 312 from being bent again, so that the glass window 20 moves out of the working position, and at the same time, the spring stop plate 50 can cooperate with the first working unit 31 to assist the biological safety cabinet 1000 suspension system to lock the glass window 20, thereby improving the safety of the biological safety cabinet 1000.

[0061] Specifically, the second working unit 32 includes a matching plate 321, a connecting plate 322, a round rod 323, a spring rod 325, a spring 324, and a handle 326. The matching plate 321 and the connecting plate 322 are connected through the round rod 323. One end of the spring rod 325 is connected with the connecting plate 322, the other end of the spring rod 325 is connected with the handle 326, the spring 324 is sleeved on the spring rod 325, the spring 324 is connected with the spring stop plate 50, and the handle 326 is located outside the spring hole 411. Similarly, a second torsion spring 328 is arranged between the connecting plate 322 and the matching plate 321, and the second torsion spring 328 is sleeved on the round rod 323. The second torsion spring 328 is used to prevent the matching plate 321 from limiting the first working unit 31 when the glass window 20 is pushed at a high speed, so as to avoid damaging the glass window 20.

[0062] The spring baffle 50 is a circular ring structure, and the spring baffle 50 is used to limit the position of the spring 324 of the second working unit 32 in the spring hole 411.

[0063] In the embodiment, the matching plate 321 and the connecting plate 322 are both cuboid structures. When the glass window 20 reaches the working position, the first sensing plate 3122 on the execution plate 312 contacts the cover plate 10, the matching plate 321 moves towards the direction close to the glass window 20, so that the matching plate 321 and the execution plate 312 contact, and the matching plate 321 provides resistance for the execution plate 312, preventing the execution plate 312 from turning again. The top surface of the matching plate 321 contacts the bottom surface of the execution plate 312, preventing the execution plate 312 from counterclockwise rotation.

[0064] In the embodiment, the number of spring rods 325 is multiple, and the multiple spring rods 325 are arranged along the length direction of the connecting plate 322. Specifically, the number of spring rods 325 is three.

[0065] The human-computer interface 41 is also provided with a movable hole 413, which is arranged in a cuboid structure and communicates with the spring hole 411. The movable hole 413 is used to provide space for the movement of the second working unit 32. The de-energized electromagnet 412 is arranged at the position where the spring hole 411 and the movable hole 413 meet.

[0066] Further, the number of spring holes 411 is matched with the number of spring rods 325.

[0067] The connecting plate 322 is provided with a connecting hole 327, which is a stepped hole, so as to fix the spring rod 325 in the connecting hole 327.

[0068] The connecting plate 322 and the matching plate 321 are both provided with connecting heads on the side close to each other. The round rod 323 connects all the connecting heads at the same time, so as to connect the matching plate 321 and the connecting plate 322.

[0069] Further, the top wall of the reserved hole 11 is provided with a second sensing plate 12, and the spring hole 411 is provided with a de-energized electromagnet 412. The de-energized electromagnet 412 is used to fix the second working unit 32 in the spring hole. When the second sensing plate 12 contacts the first sensing plate 3122, the de-energized electromagnet 412 is energized and demagnetized, so that the second working unit 32 extends out of the spring hole 411, and the second working unit 32 and the first working unit 31 abut. When the glass window 20 does not reach the working position, the connecting plate 322 is adsorbed on the de-energized electromagnet 412.

[0070] More, the visual feedback member 40 further comprises a second indicator light 43, the second indicator light 43 is electrically connected with the human-machine interface 41, and the second indicator light 43 is used for lighting after the loss type electromagnet 412 is separated from the connecting plate 322, so as to generate visual feedback. Specifically, the second indicator light 43 is bright yellow.

[0071] In the initial state, the glass window 20 is located at the lowermost end of the cabinet body 200, at this time, the biosafety cabinet 1000 is in a closed state, at this time, the fixed plate 311 and the execution plate 312 of the first working unit 31 are in a parallel state, the connecting plate 322 is adsorbed on the loss type electromagnet 412, and the first indicator light 42 and the second indicator light 43 are both in an extinguished state.

[0072] The glass window 20 is pushed upwards, the execution plate 312 is blocked by the side wall of the cover plate 10 and changes the orientation, under the action of the first torsion spring 314, the execution plate 312 rotates counterclockwise relative to the fixed plate 313, the first working unit 31 is in a curved state, and part of inertia brought by the pushing of the glass window 20 can be consumed.

[0073] When the glass window 20 reaches the working position, the position of the first working unit 31 corresponds to the position of the reserved hole 11, the execution plate 312 is no longer blocked by the cover plate 10, and the execution plate 312 restores to the original state through the elastic force of the torsion spring, the top surface of the first sensing plate 3122 of the execution plate 312 is blocked by the cover plate 10, tactile feedback is generated, and the first indicator light 42 is bright green.

[0074] At the same time, the first sensing plate 3122 and the second sensing plate 12 are in contact, so that the loss type electromagnet 412 is powered and demagnetized, the connecting block of the second working unit 32 is separated from the loss type electromagnet 412, and is popped out of the spring hole 411 under the elastic force of the spring rod 325 and the spring 324, so that the top surface of the matching plate 321 and the bottom surface of the execution plate 312 are in contact, at this time, the second indicator light 43 is bright yellow.

[0075] In summary, the embodiment of the present application provides a feedback structure 100 and a biosafety cabinet 1000, the feedback structure 100 comprises a cover plate 10, a glass window 20, a tactile feedback piece 30 and a visual feedback piece 40, the cover plate 10 is arranged on a cabinet body 200 of the biosafety cabinet 1000, the glass window 20 is slidably arranged relative to the cover plate 10, the tactile feedback piece 30 is arranged on the cover plate 10, and the visual feedback piece 40 is used to be triggered by the tactile feedback piece 30 when the glass window 20 moves to a working position, so as to generate visual feedback. When the feedback structure 100 is used, the tactile feedback piece 30 can move together with the glass window 20, and when the glass window 20 moves to the working position, the tactile feedback piece 30 can trigger the visual feedback piece 40, so that the visual feedback piece 40 generates visual feedback, ensuring that it can be accurately known that the glass window 20 has reached the working position. The feedback structure 100 can accurately feedback when the glass window 20 reaches the working position, and is more accurate and convenient to use.

[0076] The biosafety cabinet 1000 comprises a cabinet body 200 and a feedback structure 100, and the glass window 20 is slidably mounted on the cabinet body 200. When the feedback structure 100 is used, the tactile feedback piece 30 can move together with the glass window 20, and when the glass window 20 moves to the working position, the tactile feedback piece 30 can trigger the visual feedback piece 40, so that the visual feedback piece 40 generates visual feedback, ensuring that it can be accurately known that the glass window 20 has reached the working position. The feedback structure 100 can accurately feedback when the glass window 20 reaches the working position, and is more accurate and convenient to use.

[0077] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A feedback structure, characterized in that, include: Cover plate (10); A glass window (20) is slidably disposed relative to the cover plate (10); A tactile feedback element (30) is disposed on the cover plate (10); A visual feedback element (40) is used to generate visual feedback when the glass window (20) is moved to the working position by the tactile feedback element (30). The tactile feedback device (30) includes a first working unit (31), which includes a fixed plate (311), an execution plate (312), and a fixed rod (313). The fixed plate (311) and the execution plate (312) are rotatably connected by the fixed rod (313). The fixed plate (311) is connected to the glass window (20). The fixed plate (311) is used to follow the movement of the glass window (20) to drive the execution plate (312) to move. When the glass window (20) moves to the working position, the execution plate (312) contacts the cover plate (10) to trigger the visual feedback device (40). The execution plate (312) includes a plate body (3121) and a first sensing plate (3122). The plate body (3121) and the fixing rod (313) are rotatably connected. The first sensing plate (3122) is disposed on the top surface of the plate body (3121). The first sensing plate (3122) is electrically connected to the visual feedback element (40). The first sensing plate (3122) is used to contact the cover plate (10) when the plate body (3121) rotates relative to the fixing rod (313) to trigger the visual feedback element (40) to generate tactile feedback.

2. The feedback structure according to claim 1, characterized in that, The first work unit (31) further includes a first torsion spring (314), which is sleeved on the fixed rod (313). The actuating plate (312) is used to rotate relative to the fixed rod (313) under the elastic force of the first torsion spring (314), so that the actuating plate (312) and the cover plate (10) come into contact to trigger the visual feedback device (40).

3. The feedback structure according to claim 2, characterized in that, The cover plate (10) is provided with a reserved hole (11). The visual feedback device (40) is installed in the reserved hole (11). When the glass window (20) is moved to the working position, the plate (3121) rotates relative to the fixed rod (313) in the reserved hole (11) by the elastic force of the first torsion spring (314), so that the first sensing plate (3122) and the top wall of the reserved hole (11) come into contact, thereby triggering the visual feedback device (40) to generate tactile feedback.

4. The feedback structure according to claim 3, characterized in that, The visual feedback device (40) includes a human-machine interface (41) and a first indicator light (42). The human-machine interface (41) is installed in the reserved hole (11). The first indicator light (42) is electrically connected to the human-machine interface (41). The first indicator light (42) is used to light up when the first sensing plate (3122) and the top wall of the reserved hole (11) are in contact.

5. The feedback structure according to claim 4, characterized in that, The tactile feedback device (30) also includes a second work unit (32). The human-machine interface (41) is provided with a spring hole (411). The second work unit (32) is elastically disposed in the spring hole (411). The second work unit (32) is used to extend out of the spring hole (411) when the glass window (20) reaches the working position, so that the second work unit (32) and the first work unit (31) abut against each other.

6. The feedback structure according to claim 5, characterized in that, The top wall of the reserved hole (11) is provided with a second sensing plate (12), and a de-energized electromagnet (412) is provided in the spring hole (411). The de-energized electromagnet (412) is used to fix the second working unit (32) in the spring hole (411). When the second sensing plate (12) and the first sensing plate (3122) are in contact, the de-energized electromagnet (412) is energized and demagnetized, so that the second working unit (32) extends out of the spring hole (411) and the second working unit (32) abuts against the first working unit (31).

7. A biosafety cabinet, characterized in that, Includes a cabinet (200) and a feedback structure (100) as described in any one of claims 1-6, wherein the glass window (20) is slidably mounted on the cabinet (200).

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