Cabinet door mechanism and biosafety cabinet

Abstract

The application relates to the technical field of biological safety cabinets, and discloses a cabinet door mechanism which comprises a body, a counterweight structure and a driving structure. The body comprises a door frame and a glass door, the glass door is installed in the door frame in a liftable manner, the counterweight structure is connected with the upper portion of the glass door, the driving structure comprises a foot pedal rotating wheel and a connecting assembly, the foot pedal rotating wheel is located below the body, one end of the connecting assembly is connected with the lower portion of the glass door, the other end of the connecting assembly is hinged with the foot pedal rotating wheel and changes in position when the foot pedal rotating wheel rotates, and the driving structure drives the connecting assembly to displace through the rotation of the foot pedal rotating wheel, so that the glass door is driven to move upwards or downwards. The cabinet door mechanism disclosed by the application can reduce the contact between the hands of an experimenter and the handle of the glass door, thereby reducing the pollution of the hands, reducing the force exerted by the experimenter when opening the door, enhancing the reliability of the equipment, and reducing the production cost of the equipment. The application further discloses a biological safety cabinet.

Description

Technical Field

[0001] This application relates to the field of biosafety cabinet technology, such as a cabinet door mechanism and a biosafety cabinet. Background Technology

[0002] Currently, biosafety cabinet glass doors can be opened in two main ways: manually and electrically. Manual opening typically involves holding the door handle and pulling the door up or down. Electrical opening usually uses a tubular motor to control the door's movement, with control buttons or an electric foot switch to adjust the door's position.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] Manual opening mode: 1. It is physically demanding, and because the biosafety cabinet has a 1.8-meter-wide glass door, considerable force is required to pull it open; 2. Before opening the door, the operator needs to place the instruments they are holding elsewhere to free their hand, making it difficult to promptly place the instruments back into the cabinet after opening the door, resulting in inconvenient operation; 3. In high-level biosafety laboratories, hand contact with the glass door handle can easily lead to infection.

[0005] Electric opening mode: 1. In the power-off state, the tubular motor will lock up and cannot open or close the door; 2. The tubular motor has a limited lifespan, which is generally 10,000 to 20,000 cycles; 3. The tubular motor is expensive. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a cabinet door mechanism and a biosafety cabinet to reduce hand contact with the glass door, and improves the reliability of the cabinet door structure by adopting a mechanical structure, thereby reducing the cost of the cabinet door mechanism.

[0008] In some embodiments, the cabinet door mechanism includes a body, a counterweight structure, and a drive structure. The body includes a door frame and a glass door, with the glass door being liftable and height-adjustable within the door frame. The counterweight structure is connected to the upper part of the glass door. The drive structure includes a foot pedal wheel and a connecting assembly. The foot pedal wheel is located below the body, one end of the connecting assembly is connected to the lower part of the glass door, and the other end of the connecting assembly is hinged to the foot pedal wheel and changes position as the foot pedal wheel rotates. The drive structure causes the connecting assembly to move by rotating the foot pedal wheel, thereby moving the glass door up or down.

[0009] In some embodiments, the connecting assembly includes a first link and a second link. The first link is connected to the lower part of the glass door and is used to support and / or pull the glass door. The first end of the second link is hinged to the first link, and the second end is hinged to the foot pedal wheel and changes position as the foot pedal wheel rotates. The second link is used to support and / or pull the first link.

[0010] In some embodiments, the length of the second link is greater than the diameter of the pedal wheel.

[0011] In some embodiments, the pedal wheel includes a drum and a mounting base. A plurality of pedals are evenly arranged on the outer circumferential surface of the drum, and a second connecting rod is hinged to the drum. The mounting base is connected to the end of the drum and includes a first rotating shaft. The drum rotates around the first rotating shaft, and the first rotating shaft is collinear with the central axis of the drum.

[0012] In some embodiments, the second link is hinged to the end of the rotating drum, and the hinge point between the second link and the rotating drum is eccentrically set.

[0013] In some embodiments, the second link is hinged to the side and / or center of the outer peripheral surface of the rotating cylinder.

[0014] In some embodiments, the counterweight structure includes a counterweight block and a pulley assembly. The pulley assembly includes a wire rope and a pulley block. One end of the wire rope is connected to the counterweight block, and the other end of the wire rope passes through the pulley block and is connected to the upper part of the glass door.

[0015] In some embodiments, an opening is provided at the bottom of the door frame, through which a connecting component connects the glass door to the foot pedal wheel.

[0016] In some embodiments, the inner sidewall of the door frame is provided with a guide rail, and the glass door is embedded in the door frame and can move along the guide rail.

[0017] In some embodiments, the biosafety cabinet includes a door mechanism as described in any of the preceding embodiments.

[0018] The cabinet door mechanism and biosafety cabinet provided in this disclosure can achieve the following technical effects:

[0019] The cabinet door mechanism disclosed herein uses a counterweight mechanism and a drive structure to adjust the position of the glass door. The counterweight structure is connected to the upper part of the glass door and is mainly used to balance the force on the glass door. The drive structure is connected to the lower part of the glass door and is mainly used to support the glass door or pull the glass door. The counterweight structure and the drive structure work together to make the glass door stationary or move up or down.

[0020] The drive structure includes a foot pedal wheel and a connecting component. The experimenter can drive the foot pedal wheel to rotate by stepping on it, which in turn causes the end of the connecting component to change position as the foot pedal wheel rotates. The glass door moves up or down along the door frame under the influence of the connecting component.

[0021] Firstly, this reduces hand contact between the experimenter and the glass door handle, thus minimizing hand contamination. Secondly, since leg strength is greater than hand strength, using foot-operated wheels reduces the effort required for opening the door. Thirdly, compared to electric opening with a tubular motor, this invention uses a combination of human power and mechanical structure to raise and lower the glass door, allowing operation even when the biosafety cabinet is powered off, enhancing equipment reliability. Fourthly, compared to electric opening with a tubular motor, this invention uses foot-operated wheels for human-driven operation, reducing equipment production costs.

[0022] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0024] Figure 1 This is a schematic diagram of a cabinet door mechanism provided in an embodiment of this disclosure;

[0025] Figure 2 This is a schematic diagram of the upward movement state of the cabinet door mechanism provided in this embodiment. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the upward movement state of the cabinet door mechanism provided in this embodiment. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the downward movement state of the cabinet door mechanism provided in this embodiment. Figure 1 ;

[0028] Figure 5 This is a schematic diagram of the downward movement state of the cabinet door mechanism provided in this embodiment. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the force analysis of a glass door in a static state provided in an embodiment of this disclosure;

[0030] Figure 7This is a schematic diagram of the force analysis of the glass door in the upward-moving state provided in an embodiment of this disclosure;

[0031] Figure 8 This is a schematic diagram of the force analysis of the glass door in the downward state provided in an embodiment of this disclosure.

[0032] Figure label:

[0033] 10: Body; 11: Glass door; 12: Guide rail;

[0034] 20: Counterweight structure; 21: Steel wire rope; 22: Pulley; 23: Counterweight block;

[0035] 30: Drive structure; 31: Foot pedal wheel; 311: Rotary drum; 312: Pedal; 313: Mounting base; 314: First pivot; 32: Connecting assembly; 321: First link; 322: Second link; 323: Second pivot; 324: Third pivot. Detailed Implementation

[0036] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0037] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0039] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0040] Unless otherwise stated, the term "multiple" means two or more.

[0041] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0042] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0044] Combination Figure 1-5 As shown, this embodiment of the disclosure provides a cabinet door mechanism, including a body 10, a counterweight structure 20, and a drive structure 30.

[0045] The main body 10 includes a door frame and a glass door 11, which can be raised and lowered and installed inside the door frame.

[0046] The counterweight structure 20 is connected to the upper part of the glass door 11.

[0047] The drive structure 30 includes a foot pedal wheel 31 and a connecting component 32. The foot pedal wheel 31 is located below the body 10. One end of the connecting component 32 is connected to the lower part of the glass door 11, and the other end of the connecting component 32 is hinged to the foot pedal wheel 31 and changes position as the foot pedal wheel 31 rotates. The drive structure 30 causes the connecting component 32 to move by rotating the foot pedal wheel 31, thereby driving the glass door 11 to move up or down.

[0048] It is understood that the cabinet door mechanism disclosed herein uses a counterweight mechanism and a drive structure 30 to adjust the position of the glass door 11. The counterweight structure 20 is connected to the upper part of the glass door 11 and is mainly used to balance the force on the glass door 11. The drive structure 30 is connected to the lower part of the glass door 11 and is mainly used to support the glass door 11 or pull the glass door 11. The counterweight structure 20 and the drive structure 30 work together to make the glass door 11 stationary or move up or down.

[0049] The drive structure 30 is equipped with a foot pedal wheel 31 and a connecting component 32. The experimenter can use his foot to step on the foot pedal wheel 31 to drive the wheel to rotate, thereby causing the end of the connecting component 32 to change position as the foot pedal wheel 31 rotates. The glass door 11 moves up or down along the door frame under the drive of the connecting component 32.

[0050] The cabinet door mechanism of this disclosure offers several advantages. First, it reduces hand contact between the operator and the handle of the glass door 11, thus minimizing hand contamination. Second, since leg strength is greater than hand strength, the use of foot-operated wheels 31 reduces the effort required for opening the door. Third, compared to electric opening via a tubular motor, this disclosure combines human power with mechanical structure for raising and lowering the glass door 11, allowing operation even during power outages in the biosafety cabinet, enhancing equipment reliability. Fourth, compared to electric opening via a tubular motor, the use of foot-operated wheels 31 for human-driven operation reduces equipment production costs.

[0051] As an example, the connecting component 32, the foot pedal wheel 31, the glass door 11, and the door frame constitute a crank-slider mechanism. The connecting component 32 is a rigid structure. The first end of the connecting component 32 is hinged to the end of the foot pedal wheel 31 and moves in position as the foot pedal wheel 31 rotates. The second end of the connecting component 32 is hinged to the lower part of the glass door 11. When the foot pedal wheel 31 rotates, the first end of the connecting component 32 also rotates, pulling the second end of the connecting component 32 to move. Since the glass door 11 can be raised and lowered within the door frame, the movement of the second end of the connecting component 32 will cause the glass door 11 to move up and down within the door frame.

[0052] Optionally, the connecting assembly 32 includes a first link 321 and a second link 322. The first link 321 is connected to the lower part of the glass door 11 and is used to support and / or pull the glass door 11. The first end of the second link 322 is hinged to the first link 321, and the second end is hinged to the foot pedal wheel 31 and changes position as the foot pedal wheel 31 rotates. The second link 322 is used to support and / or pull the first link 321.

[0053] Understandably, the first link 321 and the second link 322 are hinged. When the glass door 11 is stationary or moves upward, the first link 321 is used to support the glass door 11, and the second link 322 is used to support the first link 321. When the glass door 11 moves downward, the first link 321 is used to pull the glass door 11, and the second link 322 is used to pull the first link 321.

[0054] As an example, the first link 321 and the second link 322 are hinged together by the second pivot 323.

[0055] Optionally, the length of the second link 322 is greater than the diameter of the pedal wheel 31.

[0056] Understandably, when the second end of the second link 322 is located at the bottom of the pedal wheel 31, the first end of the second link 322 will also extend beyond the pedal wheel 31. This facilitates the connection between the first link 321 and the second link 322, giving the first link 321 ample room to move.

[0057] Optionally, the pedal wheel 31 includes a rotating drum 311 and a mounting base 313. Multiple pedals 312 are evenly arranged on the outer circumferential surface of the rotating drum 311. The second connecting rod 322 is hinged to the rotating drum 311. The mounting base 313 is connected to the end of the rotating drum 311. The mounting base 313 includes a first rotating shaft 314. The rotating drum 311 rotates around the first rotating shaft 314. The first rotating shaft 314 is collinear with the central axis of the rotating drum 311.

[0058] Understandably, the mounting base 313 is equipped with a first rotating shaft 314, which provides a rotation center for the rotating drum 311, allowing the rotating wheel to be rotatably mounted on the mounting base 313. A pedal 312 is provided on the rotating drum 311. The experimenter applies rotational force to the rotating drum 311 by stepping on the pedal 312, causing the rotating drum 311 to rotate, thereby driving the connecting assembly 32 to move, causing the glass door 11 to move up or down.

[0059] Optionally, the second connecting rod 322 is hinged to the end of the rotating drum 311, and the hinge point between the second connecting rod 322 and the rotating drum 311 is eccentrically set.

[0060] Understandably, the second connecting rod 322 is hinged to the end of the rotating drum 311 to avoid affecting the movement of the rotating drum 311. The hinge point between the second connecting rod 322 and the rotating drum 311 is eccentrically set, that is, the hinge point between the second connecting rod 322 and the rotating drum 311 is not on the axis of the rotating drum 311. In this way, when the rotating drum 311 rotates, the second end of the second connecting rod 322 also rotates with the rotating drum 311.

[0061] As an example, when there is one rotating cylinder 311, the second connecting rod 322 is respectively located at both ends of the rotating cylinder 311; when there are two rotating cylinders 311, the two rotating cylinders 311 are arranged side by side, and there are three second connecting rods 322, with two second connecting rods 322 located at the relatively far ends of the rotating cylinders 311, and the other located between the two rotating cylinders 311.

[0062] Optionally, the second link 322 is hinged to the side and / or center of the outer peripheral surface of the rotating cylinder 311.

[0063] It is understandable that the second link 322 is connected to the outer peripheral surface of the rotating cylinder 311. The second link 322 can be connected to the side of the outer peripheral surface near the edge, or it can be connected to the middle part of the rotating cylinder 311.

[0064] Optionally, the counterweight structure 20 includes a counterweight block 23 and a pulley 22 assembly. The pulley 22 assembly includes a wire rope 21 and a pulley 22 group. One end of the wire rope 21 is connected to the counterweight block 23, and the other end of the wire rope 21 passes through the pulley 22 group and is connected to the upper part of the glass door 11.

[0065] It is understandable that the counterweight structure 20 uses a counterweight block 23 in conjunction with a pulley 22 assembly. The pulley 22 assembly redirects the pulling force of the counterweight on the glass door 11, so as to facilitate the reasonable positioning of the counterweight structure 20.

[0066] Optionally, an opening is provided at the bottom of the door frame, through which the connecting component 32 connects the glass door 11 to the foot pedal wheel 31. This facilitates the movement of the connecting component 32.

[0067] Optionally, a guide rail 12 is provided on the inner side wall of the door frame, and the glass door 11 is embedded in the door frame and can move along the guide rail 12.

[0068] Understandably, the guide rail 12 primarily guides the movement of the glass door 11, facilitating its upward or downward movement. Friction exists between the guide rail 12 and the glass door 11.

[0069] The following is combined Figures 1 to 8 The cabinet door mechanism of this application will be described.

[0070] This disclosure provides a cabinet door mechanism, including a body 10, a counterweight structure 20, and a drive structure 30.

[0071] The main body 10 includes a door frame and a glass door 11, which is height-adjustable and installed within the door frame. A counterweight structure 20 is connected to the upper part of the glass door 11. The drive structure 30 includes a foot pedal wheel 31 and a connecting assembly 32. The foot pedal wheel 31 is located below the main body 10. One end of the connecting assembly 32 is connected to the lower part of the glass door 11, and the other end of the connecting assembly 32 is hinged to the foot pedal wheel 31 and changes position as the foot pedal wheel 31 rotates. The drive structure 30 causes the connecting assembly 32 to move by rotating the foot pedal wheel 31, thereby moving the glass door 11 up or down.

[0072] The foot-operated rotating wheel 31 includes a rotating cylinder 311 and a mounting base 313. Multiple pedals 312 are evenly arranged on the outer circumference of the rotating cylinder 311. A second connecting rod 322 is hinged to the rotating cylinder 311. The mounting base 313 is connected to the end of the rotating cylinder 311. A first rotating shaft 314 is provided on the mounting base 313, providing a rotation center for the rotating cylinder 311, allowing the wheel to be rotatably mounted on the mounting base 313. The pedals 312 are provided on the rotating cylinder 311. By stepping on the pedals 312, the experimenter provides rotational force to the rotating cylinder 311, causing it to rotate, thereby driving the connecting assembly 32 to move, causing the glass door 11 to move up or down.

[0073] The connecting assembly 32 includes a first link 321 and a second link 322. The first link 321 is connected to the lower part of the glass door 11. The first end of the second link 322 is hinged to the first link 321 through a second pivot 323, and the second end is hinged to the foot pedal wheel 31 through a third pivot 324. The position changes as the foot pedal wheel 31 rotates. When the glass door 11 is stationary or moves upward, the first link 321 supports the glass door 11, and the second link 322 supports the first link 321. When the glass door 11 moves downward, the first link 321 pulls the glass door 11, and the second link 322 pulls the first link 321.

[0074] The connecting component 32, the foot pedal wheel 31, the glass door 11, and the door frame constitute a crank-slider mechanism. The connecting component 32 is a rigid structure. The first end of the connecting component 32 is hinged to the end of the foot pedal wheel 31 and moves with the rotation of the foot pedal wheel 31. The second end of the connecting component 32 is hinged to the lower part of the glass door 11. When the foot pedal wheel 31 rotates, the first end of the connecting component 32 also rotates, pulling the second end of the connecting component 32 to move. Since the glass door 11 can be raised and lowered within the door frame, the movement of the second end of the connecting component 32 will cause the glass door 11 to move up and down within the door frame.

[0075] like Figure 1 As shown, the glass door 11 is at its lowest position, and the counterweight is at its highest position. At this time, when the foot pedal 312 is stepped on, the turntable rotates clockwise, and the third rotating shaft 324 moves clockwise along the outer side of the turntable, simultaneously driving the second connecting rod 322, the second rotating shaft 323, and the first connecting rod 321 to move upward in sync, and the glass door 11 moves upward.

[0076] Glass door 11 arrived Figure 3 The position shown is the normal opening height of the safety cabinet door. Continue pressing pedal 312; the turntable rotates clockwise, and the glass door 11 reaches its position. Figure 4 The position shown is the highest position the safety cabinet door can be opened to.

[0077] Continue pressing pedal 312 with your foot; the turntable rotates clockwise, and glass door 11 is reached. Figure 5 The position shown is the door opening height of the safety cabinet during normal operation.

[0078] Continue pressing pedal 312 with your foot; the turntable rotates clockwise, and glass door 11 is reached. Figure 6 As shown, the glass door 11 of the safety cabinet is closed.

[0079] from Figures 1 to 5 The process repeats itself, with glass door 11 moving up and down repeatedly. Figures 1 to 3 It is the process of the glass door 11 rising. Figures 3 to 5 This refers to the process of the glass door 11 descending.

[0080] Glass door 11 can be installed at an angle or vertically. The following describes the installation process. Figures 6 to 8 The stress analysis of the glass door 11 of this disclosure is performed with the glass door 11 set vertically.

[0081] like Figure 6 As shown, when glass door 11 is stationary: F1+G=F2+F3.

[0082] G: The weight of glass door 11;

[0083] F1: The force exerted by the foot pedal wheel 31 on the glass door 11;

[0084] F2: Friction between glass door 11 and the sliding track;

[0085] F3: The counterweight applies force to the glass door 11 through the steel wire rope 21;

[0086] like Figure 7 As shown, when the glass door 11 moves upward: F1+F3≥G+F2.

[0087] G: The weight of glass door 11;

[0088] F1: The force exerted by the foot pedal wheel 31 on the glass door 11;

[0089] F2: Friction between glass door 11 and the sliding track;

[0090] F3: The counterweight applies force to the glass door 11 through the steel wire rope 21;

[0091] like Figure 8 As shown, when glass door 11 moves down: F1+G≥F2+F3.

[0092] G: The weight of glass door 11;

[0093] F1: The force exerted by the foot pedal wheel 31 on the glass door 11;

[0094] F2: Friction between glass door 11 and the sliding track;

[0095] F3: The counterweight applies force to the glass door 11 through the steel wire rope 21.

[0096] On the other hand, embodiments of this disclosure provide a biosafety cabinet, including the cabinet door mechanism as described in any of the preceding claims.

[0097] Using the biosafety cabinet of this disclosure, firstly, the operator can reduce hand contact with the handle of the glass door 11, thereby reducing hand contamination. Secondly, since the strength of the human leg is greater than that of the hand, the use of foot-operated casters 31 can reduce the force required for the operator to open the door. Thirdly, compared with the electric opening mode using a tubular motor, this disclosure uses a combination of human power and mechanical structure to raise and lower the glass door 11, which can still be operated when the biosafety cabinet is powered off, enhancing the reliability of the equipment. Fourthly, compared with the electric opening mode using a tubular motor, this disclosure uses foot-operated casters 31 for human power drive, reducing the production cost of the equipment.

[0098] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A cabinet door mechanism, characterized by The cabinet door mechanism comprises: a body (10) comprising a door frame and a glass door (11) which is installed in the door frame in a lifting manner; a counterweight structure (20) connected to an upper portion of the glass door (11), the counterweight structure (20) comprising a counterweight block (23); a driving structure (30) comprising a foot pedal rotating wheel (31) and a connecting assembly (32), the foot pedal rotating wheel (31) being located below the body (10), one end of the connecting assembly (32) being connected to a lower portion of the glass door (11), the other end of the connecting assembly (32) being hingedly connected to the foot pedal rotating wheel (31) and changing position along with the rotation of the foot pedal rotating wheel (31), the driving structure (30) causing the connecting assembly (32) to displace by rotating the foot pedal rotating wheel (31) to drive the glass door (11) to move upward or downward; wherein the connecting assembly (32) comprises: a first connecting rod (321) connected to the lower portion of the glass door (11), the first connecting rod (321) being used for supporting and pulling the glass door (11); a second connecting rod (322) hingedly connected to the first connecting rod (321) at a first end and hingedly connected to the foot pedal rotating wheel (31) at a second end and changing position along with the rotation of the foot pedal rotating wheel (31), the second connecting rod (322) being used for supporting and pulling the first connecting rod (321); the foot pedal rotating wheel (31) comprising a rotating drum (311) having a plurality of pedals (312) uniformly arranged on an outer circumferential surface of the rotating drum (311), the second connecting rod (322) being hingedly connected to the rotating drum (311), the second connecting rod (322) being hingedly connected to an end portion of the rotating drum (311); wherein when the glass door is at a lowest position and the counterweight block is at a highest position, the pedals are stepped by feet, the rotating disc rotates clockwise, the third rotating shaft moves clockwise along the outer side of the rotating disc, simultaneously driving the second connecting rod, the second rotating shaft and the first connecting rod to move upward synchronously, and the glass door moves upward; when the glass door reaches an opening height during normal operation of the safety cabinet, the pedals are continuously stepped by feet, the rotating disc rotates clockwise, the glass door reaches a highest opening position of the safety cabinet; when the glass door reaches the opening height during normal operation of the safety cabinet, the pedals are continuously stepped by feet, the rotating disc rotates clockwise, the glass door reaches a closing position; when the glass door is stationary, F1+G=F2+F3, wherein G is the gravity of the glass door, F1 is the force applied by the foot pedal rotating wheel to the glass door, F2 is the friction between the glass door and the sliding rail, and F3 is the force applied by the counterweight block to the glass door.

2. The cabinet door mechanism according to claim 1, wherein the length of the second connecting rod (322) is greater than the diameter of the foot pedal rotating wheel (31).

3. The cabinet door mechanism of claim 2, wherein, the foot pedal rotating wheel (31) further comprises: a mounting seat (313) connected to the end portion of the rotating drum (311), the mounting seat (313) comprising a first rotating shaft (314), the rotating drum (311) rotating around the first rotating shaft (314), and the first rotating shaft (314) being collinear with the central axis of the rotating drum (311).

4. The cabinet door mechanism according to any one of claims 1 to 3, wherein The second connecting rod (322) is eccentrically arranged with the hinge point of the rotating drum (311).

5. The cabinet door mechanism according to any one of claims 1 to 3, wherein The counterweight structure (20) further comprises: A pulley assembly comprising a steel wire rope (21) and a pulley set, one end of the steel wire rope (21) being connected with the counterweight (23), the other end of the steel wire rope (21) being connected with the upper part of the glass door (11) through the pulley set.

6. The cabinet door mechanism according to any one of claims 1 to 3, characterized in that, The bottom of the door frame is provided with an opening, and the connecting assembly (32) connects the glass door (11) and the foot pedal rotating drum (31) through the opening.

7. The cabinet door mechanism according to any one of claims 1 to 3, characterized in that, The inner side wall of the door frame is provided with a guide rail (12), and the glass door (11) is embedded in the door frame and can move along the guide rail (12).

8. A biological safety cabinet, characterized by, A cabinet comprising the cabinet door mechanism according to any one of claims 1 to 7.

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