A multi-directional locking door lock mechanism

Abstract

This application discloses a multi-directional locking door lock mechanism for installation on a sealed cabinet door. It includes a trigger assembly and a locking assembly. The locking assembly includes a rotating plate connected to the end of the trigger assembly. Rotating connecting plates are rotatably provided at both ends of the rotating plate, and each end of the two connecting plates is rotatably provided with an active locking bar. A locking pin is fixedly connected to the end of the active locking bar. An adjusting plate is also rotatably provided at the end of the adjusting plate connected to the rotating connecting plate. A driven locking bar is rotatably provided at the end of the adjusting plate, and the installation direction of the driven locking bar is perpendicular to the installation direction of the active locking bar. Several adjusting plates are provided on the active locking bar along the installation direction of the driven locking bar, and several adjusting plates are provided on the driven locking bar along the installation direction of the active locking bar. A locking pin is fixedly connected to the end of each adjusting plate. Rotating the trigger assembly drives the entire locking assembly, and the multiple locking pins work together to generate a more uniform clamping force on the contact surface between the cabinet door and the cabinet body.

Description

Technical Field

[0001] This application relates to the technical field of sealing between cabinet doors and cabinet bodies, and in particular to a multi-directional locking door lock mechanism. Background Technology

[0002] The door lock mechanism is a key component that connects the cabinet door to the cabinet side panel and enables its rotation and opening. Its performance directly affects the smoothness of the door opening and closing, installation stability, and overall sealing effect. In applications with high requirements for airtightness, such as refrigerators, constant temperature and humidity equipment cabinets, and airtight cabinets, traditional door lock mechanisms usually require multiple mounting holes to be made on the door panel and side panel during installation, and are fastened with screws.

[0003] However, this method of installation by opening holes has obvious drawbacks. Opening holes, whether in cabinet doors or side panels, will damage the integrity of the material and form tiny airflow channels, which will seriously affect the overall airtightness of the door. Secondly, traditional screw installation points are often concentrated on a single plane, and the force-bearing structure is simple. When the door is frequently opened and closed and subjected to loads, the connection points are prone to loosening, causing the door to sag or shift, resulting in insufficient reliability in the long term. Summary of the Invention

[0004] To achieve high-standard sealing performance and long-term durability in the connection between the door and the cabinet, a multi-directional locking mechanism is provided.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: A multi-directional locking door lock mechanism is used to install on a sealed cabinet door, including at least one set of trigger components and locking components. The two ends of the trigger components are respectively located on the inner and outer sides of the cabinet door, and the locking components include a rotating piece connected to the end of the trigger components. The rotating plate has rotating connecting plates at both ends, and each end of the two rotating connecting plates has an active locking bar. The end of the active locking bar is fixedly connected to a locking pin, and the installation directions of the rotating plate, rotating connecting plate, active locking bar and locking pin are all located on the same horizontal line. The end of the active locking bar connected to the rotating connecting piece is also provided with an adjusting plate, and the end of the adjusting plate is provided with a driven locking bar. The installation direction of the driven locking bar is perpendicular to the installation direction of the active locking bar. The active locking bar has several adjusting blades along the installation direction of the driven locking bar, and the driven locking bar has several adjusting blades along the installation direction of the active locking bar, and each adjusting blade is fixedly connected to a locking pin at its end.

[0006] By adopting the above technical solution, the entire locking assembly can be driven by rotating the trigger component, avoiding the need for opening holes in the cabinet door side panel to install traditional door lock mechanisms. In addition to the locking force in the active lock bar installation direction, a locking force in the driven lock bar installation direction is added, constraining the cabinet door in both horizontal and vertical directions. The locking mechanisms in both directions work together to form a more stable spatial force system. Furthermore, by setting multiple locking points, the weight of the door and the opening and closing force are distributed to multiple locking pins, avoiding excessive force at a single point. The combined action of multiple locking pins generates a more uniform pressing force on the contact surface between the cabinet door and the cabinet body, fundamentally solving the airtightness leakage problem caused by the mounting holes. When rotating the trigger component, the rotational motion can be efficiently converted into linear motion of the locking pin along its own installation direction, thereby applying a stable and uniform horizontal pressing force to the cabinet body installed with the door, ensuring the sealing between the cabinet door and the cabinet body.

[0007] Preferably, the adjusting vane includes two opposing rotating ends and a fixed end located between the two rotating ends, and a vane seat is fixedly provided on the inner side of the cabinet door, and the end of the vane seat is rotatably connected to the fixed end.

[0008] By adopting the above technical solution, the fixed end is rotatably connected to the end of the rotating plate seat. This structure provides a stable rotation center point for adjusting the rotation of the rotating plate, ensuring the accuracy and efficiency of force transmission. It can effectively convert the linear motion of the lock bar into the linear motion of the lock pin in another direction, which is a key structure for realizing the conversion of spatial force system.

[0009] Preferably, a plurality of locking pin brackets are fixed on the inner wall of the cabinet door, and the locking pin brackets are provided with guide holes for the locking pins to slide along their own installation direction.

[0010] By adopting the above technical solution, the guide hole on the locking pin bracket provides precise linear guidance for the movement of the locking pin, preventing radial sway or jamming during the movement of the locking pin, providing additional support points for the locking pin, reducing the risk of bending deformation of the locking pin due to force, thereby improving the rigidity and stability of the entire locking system.

[0011] Preferably, the end of the locking pin is tapered.

[0012] By adopting the above technical solution, the conical shape facilitates the initial insertion of the locking pin into the pressing surface on the cabinet, reducing the assembly difficulty and making the locking process of the locking pin a gradual locking process, which increases the locking force of the locking pin and ensures the sealing of the cabinet door after it is closed.

[0013] Preferably, a plurality of limiting seats are fixedly provided on the inner side of the cabinet door, and each of the limiting seats has a limiting hole for the active locking bar and the driven locking bar to slide along their own installation direction.

[0014] By adopting the above technical solution, the limiting seat effectively supports and guides the slender locking bar, preventing it from bending or twisting longitudinally when transmitting force, ensuring transmission efficiency, ensuring that the first and driven locking bars always move along the predetermined path in complex multi-link motion, and ensuring the synchronization and consistency of multiple locking pin actions.

[0015] Preferably, the triggering component includes a fixed ring, a rotating rod, and a protective ring arranged coaxially. The fixed ring passes through the cabinet door and is connected to the cabinet door. The protective ring is located on the outside of the cabinet door. The rotating rod is rotatably connected to the fixed ring. One end of the rotating rod is located on the outside of the cabinet door and rotates and locks the protective ring against the outer surface of the cabinet door. The other end of the rotating rod passes through the fixed ring and is connected to the rotating plate.

[0016] By adopting the above technical solution, the fixed ring, rotating rod, and protective ring are designed as a coaxial structure, and the axial movement of the rotating rod is converted into a clamping force on the cabinet door using a threaded connection. This allows the locking assembly to be driven through a single operating point to lock and seal the cabinet door and cabinet body, greatly simplifying the operation. The sealing ring set on the outside of the cabinet door forms a clamping structure, which not only stabilizes the lock itself, but more importantly, blocks the through hole of the rotating rod passing through the cabinet door. At the same time, the protective ring provides physical protection for the rotating rod, preventing it from being damaged by external collisions, thus improving the durability and security of the lock.

[0017] Preferably, it further includes a sealing assembly, which includes a threaded insert and an elastic sealing sleeve. The elastic sealing sleeve covers the periphery of the protective ring, the threaded insert is fixedly connected to the circumferential inner wall of the elastic sealing sleeve, and the threaded insert is threadedly connected to the circumferential outer wall of the protective ring.

[0018] By adopting the above technical solution, the elastic sealing protective sleeve, as the outermost barrier, can effectively isolate gas molecules, dust, moisture, and other contaminants from entering the internal locking mechanism, preventing the rotating rod from malfunctioning, the threaded pair from jamming, or the sealing ring from failing due to the accumulation or corrosion of contaminants. Furthermore, the elastic sealing protective sleeve and the protective ring are fixed by a threaded connection through a threaded insert. The end of the elastic sealing protective sleeve will press against the cabinet door to form the first static seal, and the threaded insert and the outer wall of the protective ring form the second static seal. The two static seals work together to block the passage of the rotating rod through the cabinet door, forming multiple sealing protections and significantly enhancing the airtightness of this critical part.

[0019] Preferably, the cabinet door is hinged to the cabinet body, and a first sealing strip is fixedly provided on the side of the cabinet body facing the cabinet door for the cabinet door to abut against. A second sealing strip is fixedly provided on the inner side of the cabinet door, and a door frame is provided around the cabinet body around the first sealing strip. When the cabinet door is closed, the door frame abuts against the second sealing strip to form a double-layer sealing protection.

[0020] By adopting the above technical solution, when the cabinet door is locked, the door frame presses the first sealing strip to form the first seal, while the edge of the cabinet door presses the second sealing strip to form the second seal. The two independent sealing lines greatly improve the sealing reliability. Even if one of the seals fails slightly, the other can still maintain an effective seal.

[0021] In summary, this application has at least the following beneficial effects: 1. By driving the entire transmission chain through the trigger component, the rotational motion is efficiently converted into the linear pressing motion of multiple locking pins in the horizontal and vertical directions, forming a uniform and stable multi-directional pressing force on the cabinet. This solves the inherent defect of poor sealing at traditional screw connection points, making the hinge particularly suitable for scenarios with stringent requirements for airtightness, such as refrigerators and constant temperature and humidity equipment, and achieving a high standard of sealing at the connection between the door and the cabinet. 2. By introducing orthogonally arranged active and passive locking bars, and combining them with adjusting discs for motion conversion and force transmission, a rigid system that performs multi-dimensional limiting and locking in space is constructed. This allows the force to be effectively distributed to multiple locking points in multiple directions, rather than concentrated on a single plane or a few connection points. This improves the stress structure and enhances the structural stability and mechanical durability of the hinge during long-term use. 3. Through the original coaxial integrated door lock component design, the technical problem of traditional locks damaging the integrity of cabinet doors during installation is fundamentally solved. The component integrates locking and sealing functions on a single axis and uses threaded transmission. Through the fixing ring and sealing ring set on the inner and outer sides of the cabinet door, an inner and outer clamping structure is formed. While achieving strong locking force, it minimizes the number of openings on the cabinet door and effectively seals them, significantly improving the inherent airtightness of the device from the structural source. 4. The end of the elastic sealing protective sleeve will press against the cabinet door to form the first static seal. The threaded ring and the outer wall of the protective ring are connected by threads to form the second static seal. The two static seals work together to block the passage of the rotating rod through the cabinet door, forming a multi-layer sealing protection. The double redundant sealing strip between the cabinet door and the cabinet body and the two independent sealing lines greatly improve the sealing reliability. Even if one seal fails slightly, the other can still maintain an effective seal. Attached Figure Description

[0022] Figure 1A schematic diagram of the structure between the cabinet door and the cabinet body; Figure 2 This is a schematic diagram of the installation structure of the door lock mechanism; Figure 3 for Figure 1 A sectional view; Figure 4 for Figure 3 A magnified view of a portion at point A; Figure 5 This is a schematic diagram of the explosion that triggers the component; Figure 6 This is a structural diagram of the locking component.

[0023] Reference numerals in the attached drawings: 1. Cabinet door; 11. Second sealing strip; 2. Cabinet body; 21. First sealing strip; 22. Door frame; 3. Trigger assembly; 31. Fixing ring; 32. Rotating rod; 33. Protective ring; 4. Sealing assembly; 41. Elastic sealing protective sleeve; 42. Threaded insert ring; 5. Locking assembly; 51. Rotating plate; 52. Rotating connecting plate; 53. Active locking bar; 54. Locking pin; 55. Adjusting plate; 551. Rotating end; 552. Fixed end; 553. Rotating hole; 56. Rotating plate seat; 57. Locking pin bracket; 571. Guide hole; 58. Limiting seat; 581. Limiting hole; 6. Driven locking bar. Detailed Implementation

[0024] The following section provides a more detailed description, in conjunction with the accompanying diagrams: As attached Figure 1 and attached Figure 2 As shown, a multi-directional locking door lock mechanism is used to install on a sealed cabinet door 1. The cabinet door 1 is usually hinged to the cabinet body 2. It also includes a trigger component 3 and a locking component 5 installed on the cabinet door 1. The locking component 5 is located inside the cabinet door 1. The trigger component 3 can trigger the locking component 5 to limit the cabinet door 1, thereby keeping the cabinet door 1 and the cabinet body 2 in a closed state. Here, there are two sets of trigger components 3 and locking components 5. The specific number of sets can be arranged according to the size requirements of the door panel, and the quantity can be one or more. Here, the two sets of trigger components 3 and locking components 5 are located on both sides of the cabinet door 1.

[0025] The cabinet body 2 extends toward the cabinet door 1 and is provided with a door frame 22. A first sealing strip 11 is fixedly connected to the inside of the cabinet door 1. The first sealing strip 21 has a rectangular structure. A second sealing strip 21 is fixedly connected to the periphery of the cabinet body 2 around the door frame 22. The second sealing strip 21 has a rectangular structure. When the cabinet door 1 is closed, the door frame 22 presses against the first sealing strip 11 to form a first seal. At the same time, the edge of the cabinet door 1 presses against the second sealing strip 21 to form a second seal. The two independent sealing lines greatly improve the sealing reliability. Even if one seal fails slightly, the other can still maintain an effective seal.

[0026] As attached Figure 3 and attached Figure 4 As shown, the trigger assembly 3 includes a fixing ring 31, a rotating rod 32, and a protective ring 33. The fixing ring 31, rotating rod 32, and protective ring 33 are coaxially arranged. The fixing ring 31 passes through the cabinet door 1, and all four sides of the fixing ring 31 are cut with flat surfaces, so that the fixing ring 31 has a square structure instead of a columnar structure, so that the fixing ring 31 can be restricted to the cabinet door 1 and will not rotate. The sealing ring is located on the outside of the cabinet door 1. The rotating rod 32 is rotatably connected to the fixing ring 31. The two ends of the rotating rod 32 are located on the inner and outer sides of the cabinet door 1, respectively, but the rotating rod 32 is located on the cabinet door 1. The diameter of the outer end is larger than the diameter of the fixing ring 31, and the end of the rotating rod 32 located on the outside of the cabinet door 1 is located inside the protective ring 33 and abuts against the bottom wall of the protective ring 33. The end of the rotating rod 32 located on the inside of the cabinet door 1 passes through the fixing ring 31. The outer circumferential wall of the fixing ring 31 is also provided with threads. The end of the fixing ring 31 located on the inside of the cabinet door 1 is threaded with a hexagonal nut. When the hexagonal nut is tightened, the rotating rod 32 can press against the protective ring 33 on the outside of the cabinet door 1, thereby fixing the fixing ring 31 and the protective ring 33, while the rotating rod 32 can rotate.

[0027] As attached Figure 4 and attached Figure 5 As shown, a sealing component 4 is also provided on the outside of the cabinet door 1. The sealing component 4 includes an elastic sealing protective sleeve 41 and a threaded ring 42. The elastic sealing protective sleeve 41 is made of rubber, and the threaded ring 42 is made of metal. The outer circumferential wall of the threaded ring 42 is embedded inside the inner circumferential wall of the elastic sealing protective sleeve 41. The elastic sealing protective sleeve 41 has a cap-like structure. The diameter of the elastic sealing protective sleeve 41 is larger than the diameter of the protective ring 33, and the elastic sealing protective sleeve 41 covers the outer periphery of the protective ring 33. The inner circumferential wall of the threaded ring 42 and the outer circumferential wall of the protective ring 33 are tightly connected by threads, and a first static seal is formed between their mating surfaces. The elastic sealing protective sleeve 41 presses against the cabinet door 1 to form a second static seal. The two static seals work together to block the passage of the rotating rod 32 through the cabinet door 1, forming multiple sealing protections and significantly enhancing the airtightness of this key part.

[0028] As attached Figure 4 and attached Figure 6As shown, the locking assembly 5 includes a rotating plate 51 fixedly connected to the end of the rotating rod 32. The rotating plate 51 is plate-shaped and is arranged vertically. The rotating plate 51 rotates with the rotation of the trigger assembly 3. Rotating connecting plates 52 are rotatably connected to the upper and lower ends of the rotating plate 51. The rotating connecting plates 52 are strip-shaped. The rotating connecting plates 52 and the rotating plate 51 are rotatably connected by means of pins or the like. The rotating connecting plates 52 and the rotating plate 51 are located on the same horizontal line in the vertical direction, so that one rotating connecting plate 52 can tilt downward as the rotating plate 51 rotates, and the other rotating connecting plate 52 can tilt upward as the rotating plate 51 rotates.

[0029] The end of the rotating connecting piece 52 furthest from the rotating piece 51 is rotatably connected to an active locking bar 53. The active locking bar 53 is long and narrow. The active locking bar 53 and the rotating connecting piece 52 are rotatably connected by a pin or other means. The end of the active locking bar 53 is fixedly connected to a locking pin 54. The locking pin 54 is cylindrical and tapered at the end, so that the locking process of the locking pin 54 is a progressive locking process, which increases the locking force of the locking pin 54 and ensures the sealing of the cabinet door 1 after it is closed. Furthermore, the active locking bar 53 and the rotating connecting piece 52 are on the same horizontal line in the vertical direction. Therefore, the upward or downward movement of the rotating connecting piece 52 can drive the active locking bar 53 and the locking pin 54 to move up and down in the vertical direction.

[0030] An adjusting vane 55 is rotatably mounted on the active locking bar 53. The adjusting vane 55 is V-shaped and includes two opposing rotating ends 551 and a fixed end 552 located between them. Several vane seats 56 corresponding to the adjusting vane 55 are fixedly connected to the inner wall of the cabinet door 1. The vane seats 56 are fixedly connected to the cabinet door 1 by welding, and the ends of the vane seats 56 and the fixed ends 552 of the adjusting vane 55 are rotatably connected by pins. This structure provides a stable rotation center point for the rotation of the adjusting vane 55, ensuring the accuracy and efficiency of force transmission. It can effectively convert the linear motion of the locking bar into the linear motion of the locking pin 54 in another direction, which is a key structure for realizing the conversion of spatial force system.

[0031] The rotating end 551 of the adjusting vane 55 has a long rotating hole 553, which makes it easier to adjust the angle. One rotating end 551 of the adjusting vane 55 is rotatably connected to the active locking bar 53 through a pin. The other rotating end 551 of the adjusting vane 55 is rotatably connected to the driven locking bar 6 through a pin. The driven locking bar 6 is long and has two bars. Both driven locking bars 6 are rotatably connected to the two active locking bars 53 in one of the locking components 5 through the adjusting vane 55. The installation direction of the driven locking bar 6 is perpendicular to the installation direction of the active locking bar 53.

[0032] The active locking bar 53 is provided with several adjusting blades 55 along the installation direction of the driven locking bar 6, and the driven locking bar 6 is provided with several adjusting blades 55 along the installation direction of the active locking bar 53. The fixed ends 552 of the adjusting blades 55 on the active locking bar 53 and the driven locking bar 6 are fixedly connected to the cabinet door 1 through the blade seat 56. One rotating end 551 is rotatably connected to the active locking bar 53 or the driven locking bar 6, and the other rotating end 551 is fixedly connected to the locking pin 54. By setting multiple adjusting blades 55 and locking pins 54, the limiting and sealing points can be increased, and the overall stability and sealing performance can be improved.

[0033] Several locking pin brackets 57 are also fixedly connected to the inner wall of the cabinet door 1. The locking pin brackets 57 are fixed to the inner wall of the cabinet door 1 by welding. The locking pin brackets 57 are respectively set to correspond to the locking pins 54. The locking pin brackets 57 have guide holes 571 for the locking pins 54 to slide along their own installation direction. The guide holes 571 can guide and restrict the sliding of the locking pins 54, ensuring that the locking pins 54 slide on the correct track.

[0034] Several limiting seats 58 are also fixedly connected to the inner wall of the cabinet door 1. The limiting seats 58 are fixed to the inner wall of the cabinet door 1 by welding. Each of the limiting seats 58 has a limiting hole 581 for the active locking bar 53 and the driven locking bar 6 to slide along their own installation direction. The limiting hole 581 can guide and restrict the sliding of the active locking bar 53 and the driven locking bar 6, ensuring that the active locking bar 53 slides in the vertical direction and that the driven locking bar 6 slides in the horizontal direction.

[0035] The implementation principle of this embodiment is as follows: When the user rotates the rotating rod 32, it drives the rotating plate 51 fixedly connected to it to rotate, which in turn drives the active locking bar 53 and the locking pin 54 to move vertically through the rotating connecting plates 52 at both ends, forming the first level of vertical locking force. On this basis, by hinged V-shaped adjusting discs 55 on the active locking bar 53 and connecting the other end of the adjusting discs 55 to the driven locking bar 6, the movement of the active locking bar 53 can be further converted into the movement of the driven locking bar 6 in the horizontal direction, realizing the second level of horizontal locking, forming a spatial orthogonal bidirectional limiting and pressing. The arrangement of multiple adjusting discs 55 and locking pins 54 realizes the distribution of load and the uniform distribution of sealing pressure. The whole system achieves high sealing performance, high stability and long-term durability of the door through multi-level linkage and spatial locking without the need to open holes in the door panel or side panel.

[0036] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A multi-directional locking door lock mechanism for being provided on a sealed cabinet door (1), characterized in that, It includes at least one set of trigger components (3) and locking components (5), the two ends of the trigger components (3) are located on the inner and outer sides of the cabinet door (1) respectively, and the locking components (5) include a rotating piece (51) connected to the end of the trigger components (3). The two ends of the rotating plate (51) are respectively provided with rotating connecting plates (52), and the ends of the two rotating connecting plates (52) are respectively provided with active locking bars (53). The ends of the active locking bars (53) are fixedly connected with locking pins (54), and the installation directions of the rotating plate (51), rotating connecting plates (52), active locking bars (53) and locking pins (54) are all located on the same horizontal line. The active locking bar (53) is connected to the rotating connecting piece (52) at one end, and an adjusting plate (55) is rotatably provided at the end of the adjusting plate (55). The driven locking bar (6) is rotatably provided at the end of the adjusting plate (55). The installation direction of the driven locking bar (6) is perpendicular to the installation direction of the active locking bar (53). The active locking bar (53) has a plurality of adjusting blades (55) along the installation direction of the driven locking bar (6), and the driven locking bar (6) has a plurality of adjusting blades (55) along the installation direction of the active locking bar (53), and each adjusting blade (55) is fixedly connected to a locking pin (54) at its end.

2. The multi-directional locking door lock mechanism according to claim 1, characterized in that, The adjusting vane (55) includes two opposing rotating ends (551) and a fixed end (552) located between the two rotating ends (551). The inner side of the cabinet door (1) is fixedly provided with a vane seat (56), and the end of the vane seat (56) is rotatably connected to the fixed end (552).

3. A multi-directional locking door latch mechanism according to claim 1 wherein, Several locking pin brackets (57) are fixed on the inner wall of the cabinet door (1). The locking pin brackets (57) have guide holes (571) for the locking pins (54) to slide along their own installation direction.

4. A multi-directional locking door latch mechanism according to claim 1, wherein, The end of the locking pin (54) is tapered.

5. A multi-directional locking door latch mechanism according to claim 1 wherein, The cabinet door (1) is fixedly provided with several limiting seats (58) on its inner side. Each of the limiting seats (58) has a limiting hole (581) for the active locking bar (53) and the driven locking bar (6) to slide along their own installation direction.

6. A multi-directional locking door latch mechanism according to claim 1 wherein, The triggering component (3) includes a fixed ring (31), a rotating rod (32), and a protective ring (33) arranged coaxially. The fixed ring (31) passes through the cabinet door (1) and is connected to the cabinet door (1). The protective ring (33) is located outside the cabinet door (1). The rotating rod (32) is rotatably connected to the fixed ring (31). One end of the rotating rod (32) is located outside the cabinet door (1) and rotates and locks the protective ring (33) against the outer surface of the cabinet door (1). The other end of the rotating rod (32) passes through the fixed ring (31) and is connected to the rotating plate (51).

7. A multi-directional locking door latch mechanism according to claim 6 wherein, It also includes a sealing assembly (4), which includes a threaded insert (42) and an elastic sealing sleeve (41). The elastic sealing sleeve (41) covers the periphery of the protective ring (33). The threaded insert (42) is fixedly connected to the circumferential inner wall of the elastic sealing sleeve (41), and the threaded insert (42) is threadedly connected to the circumferential outer wall of the protective ring (33).

8. A multi-directional deadbolt door lock mechanism as defined in claim 1 wherein, The cabinet door (1) is hinged to the cabinet body (2). The cabinet body (2) is fixedly provided with a first sealing strip (21) on the side facing the cabinet door (1) for the cabinet door (1) to abut against. The cabinet door (1) is fixedly provided with a second sealing strip (11) on the inside. The cabinet body (2) is provided with a door frame (22) around the first sealing strip (21). When the cabinet door (1) is closed, the door frame (22) abuts against the second sealing strip (11) to form a double-layer sealing protection.

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