Cabinet door device

Abstract

The invention discloses a cabinet door device which comprises a door frame, a movable door located in the door frame and a plurality of pulley assemblies connecting the door frame and the movable door, the door frame comprises a top rail and a bottom rail which are parallel to each other, and the movable door is located between the top rail and the bottom rail. The pulley assembly comprises a top pulley assembly and a bottom pulley assembly which are respectively provided with a pulley box, a moving wheel set and an elastic component connected with the pulley box and the moving wheel set. In the top pulley assembly, a pulley box is fixedly held at the top of the movable door, and a movable wheel set is clamped on a top rail and upwards lifts the pulley box and the movable door through an elastic component; in the bottom pulley assembly, a pulley box is fixedly arranged at the bottom of the movable door, and a movable wheel set is clamped on the bottom rail and upwards pushes the pulley box and the movable door through an elastic component. The top pulley assembly and the bottom pulley assembly both provide supporting force for the movable door through elastic components. The elastic component is adjustable, and the vertical position of the movable door can be adjusted in the vertical direction by changing the spring pressure of the elastic component.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture products, and particularly to a cabinet door device applied to folding cabinet doors. Background Art

[0002] With the improvement of living standards, while people's requirements for the quality of home life increase, they also pay more attention to the utilization rate of furniture space and the convenience of use. The emergence of folding cabinet doors solves the problem that traditional hinged doors need to occupy a large space when opened. The pulley device of the existing folding cabinet door hoists the wardrobe door panel on the top track through the top pulley device and restricts the movement range of the bottom of the wardrobe door panel through the bottom limiting device; among them, the bottom limiting device does not provide an upward supporting force to the door panel in the vertical direction, resulting in the entire weight of the door panel falling on the top track, so that the top track and the cabinet body or wall for installing the door panel need to have higher load-bearing capacity to meet the normal use of the folding cabinet door.

[0003] At the same time, the top pulley device in the existing pulley device of the folding cabinet door cannot be adjusted, and the bottom limiting device can only be used within a limited precision range, resulting in high precision requirements for the size of the cabinet body or wall for installing the door panel, greatly restricting the applicable range of the existing pulley device of the folding cabinet door; that is, the top of the wall or cabinet body needs to have strong load-bearing capacity, and there cannot be a large height difference between the top and bottom of the wall or cabinet body.

[0004] Therefore, it is hoped to propose a new cabinet door device to overcome the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a cabinet door device, the pulley assembly of which can provide an upward supporting force to the moving door in the vertical direction and can be flexibly adjusted.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A cabinet door device includes a door frame, at least one movable door located within the door frame, and several pulley assemblies connected between the door frame and the movable door. The door frame includes a top track and a bottom track that extend horizontally and are parallel to each other. The movable door is located between the top track and the bottom track. The several pulley assemblies include a top pulley assembly connecting the top track and the movable door and a bottom pulley assembly connecting the bottom track and the movable door. And each pulley assembly is provided with a pulley box fixed to the movable door, a movable wheel set that moves vertically relative to the pulley box, and an elastic member connected between the pulley box and the movable wheel set. In the top pulley assembly, the pulley box is fixed to the top of the movable door, the movable wheel set is clamped to the top track, and the movable wheel set pulls up the pulley box and the top of the movable door through the elastic member. In the bottom pulley assembly, the pulley box is fixed to the bottom of the movable door, the movable wheel set is clamped to the bottom track, and the movable wheel set pushes up the pulley box and the bottom of the movable door through the elastic member.

[0007] In a preferred embodiment, the pulley box is provided with a box body extending vertically, a through groove penetrating the box body vertically, and a transverse groove located within the box body. The elastic member includes a connecting member connected to the movable wheel set, a screw rod received in the through groove, a spring sleeved on the screw rod, and a gasket clamped in the transverse groove. The connecting member is provided with a protruding portion partially extending into the through groove, and the protruding portion is connected to the vertical end of the screw rod. The screw rod is provided with a nut at the other vertical end. One end of the spring abuts against the gasket and the other end abuts against the nut or the protruding portion.

[0008] In a preferred embodiment, in the top pulley assembly, the movable wheel set is located above the pulley box. The connecting member is connected to the lower part of the movable wheel set and the protruding portion extends downward into the through groove. The screw rod is assembled into the through groove vertically from bottom to top and sequentially passes through the spring and the gasket until it is connected to the protruding portion. The screw rod is threadedly connected to the protruding portion of the connecting member.

[0009] In a preferred embodiment, in the top pulley assembly, the gasket is disposed adjacent to the protruding portion. The upper end of the spring is connected to the gasket and the lower end is connected to the nut of the screw rod. The nut pushes up the gasket through the spring, so that the movable wheel set pulls up the pulley box holding the gasket and the movable door connected to the pulley box.

[0010] In a preferred embodiment, in the bottom pulley assembly, the moving wheel set is located below the pulley box, the connecting member is connected above the moving wheel set and the protruding portion extends upward into the through groove, the screw is assembled vertically downward into the through groove and sequentially passes through the gasket and the spring until it is connected to the protruding portion, and the screw is threadedly connected to the protruding portion of the connecting member.

[0011] In a preferred embodiment, in the bottom pulley assembly, the gasket is disposed adjacent to the nut, the upper end of the spring is connected to the gasket and the lower end is connected to the protruding portion of the connecting member, and the protruding portion upwardly pushes the gasket via the spring, such that the moving wheel set upwardly pushes the pulley box holding the gasket and the moving door connected to the pulley box.

[0012] In a preferred embodiment, the box body is provided with a first short side and a second short side that are parallel to each other and a first long side and a second long side that are connected to the transverse sides of the first short side and the second short side, the through groove vertically penetrates the first short side and the second short side, and the through groove is disposed adjacent to the first long side.

[0013] In a preferred embodiment, the pulley box is provided with at least one hinge hole adjacent to the second long side, the pulley assembly includes a hinge connecting the pulley box and the moving door, one end of the hinge is inserted and fixed in the hinge hole and the other end is held on the moving door.

[0014] In a preferred embodiment, the connecting member is arranged in an L shape and is provided with a connecting seat extending transversely, the protruding portion is formed by extending vertically from the connecting seat, the moving wheel set is provided with a seat body and several moving wheels mounted on the seat body, the seat body is provided with a mounting portion extending transversely beyond the first long side and a clamping portion extending vertically from the mounting portion, the moving wheels are held on the mounting portion, and the clamping portion is assembled transversely to the connecting seat of the connecting member.

[0015] In a preferred embodiment, the moving door is a movable folding door and is provided with a pair of door leaves and hinges connecting between the pair of door leaves, the pair of door leaves are folded relative to the hinges, and several pulley assemblies are respectively arranged at the corners of the door leaves away from the hinges.

[0016] Compared with the prior art, the present invention has the following beneficial effects: several of the pulley assemblies include a top pulley assembly connecting the top track and the moving door and a bottom pulley assembly connecting the bottom track and the moving door, and each pulley assembly is provided with a pulley box fixed to the moving door, a moving wheel set moving vertically relative to the pulley box, and an elastic member connecting the pulley box and the moving wheel set. In the top pulley assembly, the pulley box is fixed to the top of the moving door, the moving wheel set is clamped to the top track, and the moving wheel set pulls up the pulley box and the top of the moving door through the elastic member; in the bottom pulley assembly, the pulley box is fixed to the bottom of the moving door, the moving wheel set is clamped to the bottom track, and the moving wheel set pushes up the pulley box and the bottom of the moving door through the elastic member. Both the top pulley assembly and the bottom pulley assembly provide an upward supporting force to the moving door in the vertical direction through their elastic members; and both the top pulley assembly and the bottom pulley assembly are in a state that can be adjusted at any time. By changing the spring pressure of the elastic member, the up and down positions of the moving door can be adjusted in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the cabinet door device in a preferred embodiment of the present invention.

[0018] Figure 2 is Figure 1 the front view of the cabinet door device shown.

[0019] Figure 3 is Figure 2 the sectional view of the forward top pulley assembly shown.

[0020] Figure 4 is Figure 3 the exploded view of the forward top pulley assembly shown.

[0021] Figure 5 is Figure 2 the sectional view of the reverse top pulley assembly shown.

[0022] Figure 6 is Figure 5 the exploded view of the reverse top pulley assembly shown.

[0023] Figure 7 is Figure 2 the sectional view of the forward bottom pulley assembly shown.

[0024] Figure 8 is Figure 7 the exploded view of the forward bottom pulley assembly shown.

[0025] Figure 9 is Figure 2 the sectional view of the reverse bottom pulley assembly shown.

[0026] Figure 10 is Figure 9 an exploded view of the reverse bottom pulley assembly shown in the figure. Specific embodiments

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0028] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the description of the present invention, unless otherwise clearly defined and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Please refer to Figures 1 to 10 As shown in the figure, a preferred embodiment of the present invention discloses a cabinet door device 100, which is usually applied to the wardrobe of household products. The wardrobe has a cabinet body and the cabinet door device 100. The cabinet body is used to store clothes or other items, and the cabinet door device 100 is used to close or open the cabinet body.

[0031] Please refer to Figures 1 to 2 As shown in the figure, the cabinet door device 100 includes a door frame 10, at least one movable door 20 located inside the door frame 10, and several pulley assemblies 30 connected between the door frame 10 and the movable door 20. The several pulley assemblies 30 are all composed of general components, so that the pulley assemblies 30 have a wider application range.

[0032] The door frame 10 is provided with an upper door frame 11 extending horizontally, a left door frame 12 and a right door frame 13 connected to the two lateral sides of the upper door frame 11, and a top rail 14 and a bottom rail 15 extending horizontally and parallel to each other. The upper door frame 11 is located above the ground and is arranged parallel to the ground. The left door frame 12 and the right door frame 13 are arranged parallel to each other and extend vertically along the two lateral sides of the upper door frame 11 to the ground. The top rail 14 is connected to the bottom of the upper door frame 11. In this embodiment, the door frame 10 is not provided with a lower door frame, so the bottom rail 15 is installed on the ground to reduce the height of the bottom rail 15. In other embodiments, the door frame 10 may also be provided with a lower door frame located on the ground, and at this time the bottom rail 15 is installed on the top of the lower door frame.

[0033] The movable door 20 is located between the top rail 14 and the bottom rail 15. In this embodiment, the top rail 14 and the bottom rail 15 play a role in limiting and guiding the movement of the movable door 20. The movable door 20 is a movable folding door and is used to move and fold on the door frame 10. Specifically, the movable door 20 is provided with a pair of door leaves 21 and a hinge 22 connected between the pair of door leaves 21. The pair of door leaves 21 can be folded relative to the hinge 22. In other embodiments, two adjacent door leaves 21 can also be connected by a rotating shaft, a hinge, etc.

[0034] Combined Figure 1 As shown, the movable door 20 can be moved to any position according to actual needs to ensure that the space inside the cabinet can be opened, so as to facilitate the access of items inside the cabinet and also facilitate the opening of the side-mounted drawers, improving the utilization rate and convenience of use of the furniture. In this embodiment, there are two movable doors 20, and the two movable doors 20 are arranged side by side horizontally, and the number of door leaves 21 of each movable door 20 is two. In other embodiments, the movable door 20 can be provided with three, four or other numbers of door leaves 21 according to actual needs, and the pulley assemblies 30 on each movable door 20 are not limited to two groups and can also be multiple groups.

[0035] Please refer to Figures 3 to 10 As shown, the pulley assembly 30 is connected to the movable door 20 and is used to realize the sliding of the movable door 20 on the door frame 10. In this embodiment, several pulley assemblies 30 are respectively arranged at the corners of the door leaves 21 of the movable door 20 far from the hinge 22. And each pulley assembly 30 is provided with a pulley box 40 fixed on the movable door 20, a moving wheel set 50 moving vertically relative to the pulley box 40, and an elastic member 60 connected between the pulley box 40 and the moving wheel set 50. In this embodiment, the moving wheel set 50 pulls or pushes the pulley box 40 through the elastic member 60.

[0036] A plurality of the pulley assemblies 30 include a top pulley assembly 31 connecting the top track 14 and the movable door 20 and a bottom pulley assembly 32 connecting the bottom track 15 and the movable door 20. Among them, in the top pulley assembly 31, the pulley box 40 is held at the top of the movable door 20, the moving wheel set 50 is clamped to the top track 14, and the moving wheel set 50 upwardly pulls the pulley box 40 and the top of the movable door 20 through the elastic member 60; in the bottom pulley assembly 32, the pulley box 40 is held at the bottom of the movable door 20, the moving wheel set 50 is clamped to the bottom track 15, and the moving wheel set 50 upwardly pushes the pulley box 40 and the bottom of the movable door 20 through the elastic member 60. In this embodiment, both the top pulley assembly 31 and the bottom pulley assembly 32 provide an upward supporting force to the movable door 20 in the vertical direction through their elastic members 30; and the top pulley assembly 31 and the bottom pulley assembly 32 are in a state that can be adjusted at any time. By changing the spring pressure of the elastic member 60, the up and down positions of the movable door 20 can be adjusted in the vertical direction.

[0037] On the other hand, each component in a plurality of the pulley assemblies 30 is a general component, and at least two functions of the pulley assemblies can be realized by adjusting the directions or installation positions of the components, that is, the pulley assembly 30 has at least two forms of the top pulley assembly 31 and the bottom pulley assembly 32; when the pulley assembly 30 is in the form of the top pulley assembly 31, the moving wheel set 50 is located above the pulley box 40 for clamping to the top track 14; when the pulley assembly 30 is in the form of the bottom pulley assembly 32, the moving wheel set 50 is located below the pulley box 40 for clamping to the bottom track 15.

[0038] The pulley box 40 is provided with a box body 41 and a box cover 42 extending vertically, a through groove 43 vertically penetrating the box body 41, and two transverse grooves 44 located in the box body 41. The box cover 42 is connected to the box body 41 by screw cooperation to form the above-mentioned pulley box 40. The box body 41 of the pulley box 40 is provided with a first short side 411 and a second short side 412 that are parallel to each other, and a first long side 413 and a second long side 414 connecting the two transverse sides of the first short side 411 and the second short side 412; the through groove 43 vertically penetrates the first short side 411 and the second short side 412, and the through groove 43 is arranged adjacent to the first long side 413. The two transverse grooves 44 include a first transverse groove 441 adjacent to the first short side 411 and a second transverse groove 442 adjacent to the second short side 412.

[0039] In this embodiment, the pulley box 40 is vertically symmetrically arranged, and the pulley box 40 has a forward position and a reverse position. When the pulley box 40 is in the forward position, the first short side 411 is above the second short side 412. When the pulley box 40 is in the reverse position, the second short side 412 is above the first short side 411; that is, rotating the pulley box 40 in the forward position by 180° is the reverse position of the pulley box 40. The pulley box 40 is designed with a vertically symmetric structure. By adjusting the left - right direction of the pulley box 40 and the position of the gasket 64 of the elastic component 60 in the pulley box 40, a set of general components can realize the functions of at least two pulley assemblies, which are four in this embodiment. The pulley box 40 is further provided with at least one hinge hole 45 adjacent to the second long side 414. The pulley assembly 30 further includes a hinge 70 connecting the pulley box 40 and the moving door 20. One end of the hinge 70 is inserted and fixed in the hinge hole 45 and the other end is held on the door leaf 21 of the moving door 20.

[0040] The moving wheel set 50 is provided with a seat body 51 and several moving wheels 52 mounted on the seat body 51. The number of moving wheels 52 can be two, four or more. In this embodiment, there are four moving wheels 52, and they are arranged in pairs on the longitudinal sides of the seat body 51. The seat body 51 is provided with a mounting portion 511 extending transversely beyond the first long side 413 and a clamping portion 512 extending vertically from the mounting portion 511. The moving wheels 52 are held on the mounting portion 511 and clamped to the top track 14 or the bottom track 15. The clamping portion 512 is assembled transversely to the connecting member 61 of the elastic component 60.

[0041] The elastic component 60 includes a connecting member 61 connected to the moving wheel set 50, a screw rod 62 received in the through - slot 43, a spring 63 sleeved on the screw rod 62, and a gasket 64 clamped in the transverse slot 44. The connecting member 61 is arranged in an L - shape and is provided with a connecting seat 611 extending transversely and a protruding portion 612 extending vertically from the connecting seat 611. At least a part of the protruding portion 612 extends into the through - slot 43.

[0042] The connecting seat 611 is provided with a slot (not labeled) extending transversely. The seat body 51 is provided with clamping protrusions (not labeled) protruding outward from both longitudinal sides of the clamping portion 512. The clamping portion 512 of the seat body 51 is inserted from one side of the second long side 414 transversely towards the first long side 413 into the connecting seat 611; at this time, the clamping protrusions are received in the slot, and the clamping portion 512 and the connecting seat 611 are fixed together by means of screw connection.

[0043] The screw rod 62 is formed to extend vertically. One vertical end of the screw rod 62 is connected to the protruding portion 612 of the connecting member 61, and a nut 621 is provided at the other vertical end, that is, the protruding portion 612 is connected to the vertical end of the screw rod 62 far from the nut 621. One end of the spring 63 abuts against the gasket 64, and the other end abuts against the nut 621 or the protruding portion 612; the pulley assembly 30 is configured with the spring 63, and the elastic force of the spring 63 provides a supporting force for the door leaf 21 of the movable door 20; and, the screw rod 62 is threadedly connected to the protruding portion 612 of the connecting member 61, so that the pulley assembly 30 can be flexibly adjusted to be in a state of being adjustable at any time.

[0044] Please refer to Figures 3 to 6 As shown, the pulley assembly 30 is in the form of the top pulley assembly 31. The moving wheel set 50 is located above the pulley box 40. The connecting member 61 is connected below the moving wheel set 50, and the protruding portion 612 extends downward into the through groove 43. The screw rod 62 is assembled into the through groove 43 vertically from bottom to top and sequentially passes through the spring 63 and the gasket 64 until it is connected to the protruding portion 612. The gasket 64 is arranged adjacent to the protruding portion 612, that is, the gasket 64 is clamped in the transverse groove 44 adjacent to the moving wheel set 50.

[0045] The upper end of the spring 63 is connected to the gasket 64, and the lower end is connected to the nut 621 of the screw rod 62. The nut 621 pushes the gasket 64 upward via the spring 63, so that the moving wheel set 50 pulls up the pulley box 40 holding the gasket 64 and the movable door 20 connected to the pulley box 40. Specifically, the moving wheel set 50 at the top track 14 can provide an upward pulling force for the screw rod 62, and through the elastic force of the spring 63, the gasket 64 can provide an upward supporting force for the pulley box 40, and then provide an upward supporting force for the door leaf 21 through the hinge 70 on the pulley box 40. At the same time, in the top pulley assembly 31, by turning the screw rod 62 to adjust the compression amount of the spring 63, and further adjusting the pressure of the spring 63, the up and down position of the door leaf 21 can be adjusted in the vertical direction.

[0046] Furthermore, the top pulley assembly 31 can also be divided into a forward top pulley assembly 311 and a reverse top pulley assembly 312. Combining Figure 3 and Figure 4 As shown, the top pulley assembly 31 is the forward top pulley assembly 311. At this time, the pulley box 40 is in the forward position. The screw rod 62 is inserted into the through groove 43 from the second short side 412, and the gasket 64 is clamped in the first transverse groove 441. Combining Figure 5 and Figure 6As shown, the top pulley assembly 31 is a reverse top pulley assembly 312, the pulley box 40 is in the reverse position, the screw 62 is inserted into the through groove 43 from the first short side 411, and the gasket 64 is clamped in the second transverse groove 442. It can be seen that the forward top pulley assembly 311 and the reverse top pulley assembly 312 are symmetrically arranged along the vertical axis.

[0047] Please refer to Figures 7 to 10 As shown, the pulley assembly 30 is in the form of the bottom pulley assembly 32, the moving wheel set 50 is located below the pulley box 40, the connecting piece 61 is connected above the moving wheel set 50 and the protruding part 612 extends upward into the through groove 43, and the screw 62 is assembled into the through groove 43 vertically from top to bottom and sequentially passes through the gasket 64 and the spring 63 until it is connected to the protruding part 612. The gasket 64 is arranged adjacent to the nut 621, that is, the gasket 64 is clamped in the transverse groove 44 away from the moving wheel set 50.

[0048] The upper end of the spring 63 is connected to the gasket 64 and the lower end is connected to the protruding part 612 of the connecting piece 61. The protruding part 612 pushes the gasket 64 upward via the spring 63, so that the moving wheel set 50 pushes the pulley box 40 holding the gasket 64 and the moving door 20 connected to the pulley box 40 upward. Specifically, the spring 63 is always in a compressed state, the moving wheel set 50 at the bottom track 15 is always pressed on the bottom track 15, and the connecting piece 61 on the moving wheel set 50 enables the gasket 64 to provide an upward supporting force for the pulley box 40 through the elastic force of the spring 63, and then provides an upward supporting force for the door leaf 21 through the hinge 70 on the pulley box 40.

[0049] Furthermore, the bottom pulley assembly 32 can also be divided into a forward bottom pulley assembly 321 and a reverse bottom pulley assembly 322. Combining Figure 7 and Figure 8 As shown, the bottom pulley assembly 32 is a forward bottom pulley assembly 321, the pulley box 40 is in the forward position, the screw 62 is inserted into the through groove 43 from the first short side 411, and the gasket 64 is clamped in the first transverse groove 441. Combining Figure 9 and Figure 10 As shown, the bottom pulley assembly 32 is a reverse bottom pulley assembly 322, the pulley box 40 is in the reverse position, the screw 62 is inserted into the through groove 43 from the second short side 412, and the gasket 64 is clamped in the second transverse groove 442. It can be seen that the forward bottom pulley assembly 321 and the reverse bottom pulley assembly 322 are symmetrically arranged along the vertical axis.

[0050] In the present invention, several of the pulley assemblies 30 include a top pulley assembly 31 connecting the top track 14 and the moving door 20 and a bottom pulley assembly 32 connecting the bottom track 15 and the moving door 20. Each pulley assembly 30 is provided with a pulley box 40 fixed to the moving door 20, a moving wheel set 50 moving vertically relative to the pulley box 40, and an elastic member 60 connecting the pulley box 40 and the moving wheel set 50. In the top pulley assembly 31, the pulley box 40 is fixed to the top of the moving door 20, the moving wheel set 50 is clamped to the top track 14, and the moving wheel set 50 pulls up the pulley box 40 and the top of the moving door 20 through the elastic member 60. In the bottom pulley assembly 32, the pulley box 40 is fixed to the bottom of the moving door 20, the moving wheel set 50 is clamped to the bottom track 15, and the moving wheel set 50 pushes up the pulley box 40 and the bottom of the moving door 20 through the elastic member 60. Both the top pulley assembly 31 and the bottom pulley assembly 32 provide an upward supporting force to the moving door 20 in the vertical direction through their elastic members 60; and the top pulley assembly 31 and the bottom pulley assembly 32 are in a state of being adjustable at any time. By changing the spring pressure of the elastic member 60, the vertical position of the moving door 20 can be adjusted in the vertical direction.

[0051] In summary, the above are only the preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A cabinet door device, comprising a door frame, at least one movable door located in the door frame, and a plurality of pulley assemblies connected between the door frame and the movable door, wherein the door frame comprises a top track and a bottom track extending in a transverse direction and parallel to each other, and the movable door is located between the top track and the bottom track; characterized in that: The plurality of pulley assemblies include a top pulley assembly connecting the top track and the moving door and a bottom pulley assembly connecting the bottom track and the moving door, and each of the pulley assemblies is provided with a pulley box fixed on the moving door, a moving wheel group moving vertically relative to the pulley box, and an elastic component connected between the pulley box and the moving wheel group; in the top pulley assembly, the pulley box is fixed on the top of the moving door, the moving wheel group is clamped on the top track, and the moving wheel group pulls the pulley box and the top of the moving door upwards through the elastic component; in the bottom pulley assembly, the pulley box is fixed on the bottom of the moving door, the moving wheel group is clamped on the bottom track, and the moving wheel group pushes the pulley box and the bottom of the moving door upwards through the elastic component.

2. The cabinet door device according to claim 1, characterized in that: The pulley box is provided with a box body extending vertically, a through groove penetrating the box body vertically and a transverse groove located in the box body, the elastic component includes a connecting piece connected to the moving wheel group, a screw rod accommodated in the through groove, a spring sleeved on the screw rod and a gasket clamped in the transverse groove, the connecting piece is provided with a protruding portion partially extending into the through groove, and the protruding portion is connected to one vertical end of the screw rod, the screw rod is provided with a nut located at the other vertical end, one end of the spring abuts against the gasket and the other end abuts against the nut or the protruding portion.

3. The cabinet door device according to claim 2, characterized in that: In the top pulley assembly, the moving wheel group is located above the pulley box, the connecting piece is connected to the bottom of the moving wheel group and the protrusion extends downward into the through groove, the screw is assembled into the through groove from bottom to top vertically and passes through the spring and the gasket in sequence until it is connected to the protrusion, and the screw is threadedly connected to the protrusion of the connecting piece.

4. The cabinet door device according to claim 3, characterized in that: In the top pulley assembly, the gasket is arranged adjacent to the protruding portion, the upper end of the spring is connected to the gasket and the lower end is connected to the nut of the screw rod, and the nut pushes the gasket upward via the spring, so that the moving wheel group pulls up the pulley box that holds the gasket and the moving door connected to the pulley box.

5. The cabinet door device according to claim 2, characterized in that: In the bottom pulley assembly, the moving wheel group is located below the pulley box, the connecting piece is connected to the top of the moving wheel group and the protrusion extends upward into the through groove, the screw is assembled into the through groove from top to bottom vertically and passes through the gasket and the spring in sequence until it is connected to the protrusion, and the screw is threadedly connected to the protrusion of the connecting piece.

6. The cabinet door device according to claim 5, characterized in that: In the bottom pulley assembly, the gasket is arranged adjacent to the nut, the upper end of the spring is connected to the gasket and the lower end is connected to the protruding portion of the connecting member, and the protruding portion pushes the gasket upward via the spring, so that the moving wheel group pushes upward against the pulley box that holds the gasket and the moving door connected to the pulley box.

7. The cabinet door device according to claim 2, characterized in that: The box body is provided with a first short side and a second short side parallel to each other and a first long side and a second long side connected to the first short side and the second short side on both lateral sides. The through slot vertically penetrates the first short side and the second short side, and the through slot is arranged adjacent to the first long side.

8. The cabinet door device according to claim 7, characterized in that: The pulley box is provided with at least one hinge hole adjacent to the second long side, and the pulley assembly comprises a hinge connecting the pulley box and the movable door, one end of the hinge is inserted and fixed in the hinge hole and the other end is fixed on the movable door.

9. The cabinet door device according to claim 8, characterized in that: The connecting member is L-shaped and is provided with a connecting seat extending in the transverse direction. The protruding portion is formed by extending vertically from the connecting seat. The moving wheel group is provided with a seat body and a plurality of moving wheels mounted on the seat body. The seat body is provided with a mounting portion extending in the transverse direction beyond the first long side and a clamping portion extending vertically from the mounting portion. The moving wheels are fixed on the mounting portion, and the clamping portion is assembled to the connecting seat of the connecting member in the transverse direction.

10. The cabinet door device according to claim 1, characterized in that: The movable door is a movable folding door and is provided with a pair of door leaves and a hinge connected between the pair of door leaves. The pair of door leaves are folded relative to the hinge, and the plurality of pulley assemblies are respectively arranged at corners of the door leaves away from the hinge.

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