Cabinet door device

Abstract

The utility model 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 utility model relates to furniture technology field especially, it relates to a cabinet door device for folding cabinet door. BACKGROUND

[0002] With the improvement of living standards, people's requirements for the quality of home life are improved, and they also pay more attention to the utilization rate and convenience of furniture space. The emergence of folding cabinet door solves the problem of large space occupied by traditional hinged door opening. The pulley device of the existing folding cabinet door is hung on the top track by the top pulley device, and the movement range of the bottom of the cabinet door plate is limited by the bottom limiting device; wherein, the bottom limiting device does not provide upward supporting force to the door plate in the vertical direction, so that the weight of the whole door plate falls on the top track, so that the top track and the cabinet or wall body on which the door plate is installed need to have higher bearing capacity to meet the normal use of the folding cabinet door.

[0003] At the same time, the top pulley device of the existing folding cabinet door pulley device cannot be adjusted, and the bottom limiting device can only be used within a limited precision range, so that the size of the cabinet or wall body on which the door plate is installed has a higher precision requirement, which greatly limits the application range of the existing folding cabinet door pulley device; that is, the top of the wall body or the cabinet needs to have strong bearing capacity, and the top and bottom of the wall body or the cabinet cannot have large height difference.

[0004] Therefore, it is hoped to provide a new cabinet door device to overcome the above defects. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a cabinet door device, which can provide upward supporting force to the moving door in the vertical direction and can be adjusted flexibly.

[0006] To achieve the above object, the utility model discloses the following technical scheme: a cabinet door device, including door frame, at least one mobile door in the door frame and the several pulley assembly connected between the door frame and the mobile door, the door frame includes the top rail and bottom rail that extend along the transverse and are parallel to each other, and the mobile door is located between the top rail and the bottom rail. Several pulley assemblies include the top pulley assembly connected with the top rail and the mobile door and the bottom pulley assembly connected with the bottom rail and the mobile door, and each pulley assembly is provided with the pulley box held on the mobile door, the mobile wheel group moving along the vertical direction relative to the pulley box and the elastic component connected between the pulley box and the mobile wheel group. In the top pulley assembly, the pulley box is held on the top of the mobile door, the mobile wheel group is clamped on the top rail, and the mobile wheel group pulls up the pulley box and the top of the mobile door through the elastic component; in the bottom pulley assembly, the pulley box is held on the bottom of the mobile door, the mobile wheel group is clamped on the bottom rail, and the mobile wheel group pushes up the pulley box and the bottom of the mobile door through the elastic component.

[0007] In the preferred implementation, the pulley box is provided with a box body extending along the vertical direction, a through slot penetrating the box body along the vertical direction, and a horizontal slot in the box body. The elastic component includes a connecting piece connected to the mobile wheel group, a screw rod received in the through slot, a spring sleeved on the screw rod, and a gasket clamped in the horizontal slot. The connecting piece is provided with a protruding portion extending into the through slot, and the protruding portion is connected to a 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 the preferred implementation, in the top pulley assembly, the mobile wheel group is located above the pulley box, the connecting piece is connected below the mobile wheel group, and the protruding portion extends downward into the through slot. The screw rod is assembled into the through slot from bottom to top along the vertical direction, and sequentially passes through the spring and the gasket until connected to the protruding portion. The screw rod is threadedly connected to the protruding portion of the connecting piece.

[0009] In the preferred implementation, 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. The nut pushes up the gasket via the spring, so that the mobile wheel group pulls up the pulley box holding the gasket and the mobile door connected to the pulley box.

[0010] In a preferred embodiment, 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 slot, the screw rod is assembled into the through slot vertically from top to bottom and sequentially passes through the gasket and the spring until connected to the protruding portion, and the screw rod is threadedly connected to the protruding portion of the connecting member.

[0011] In a preferred embodiment, 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, the protruding portion pushes the gasket upward through the spring, so that the moving wheel set pushes the pulley box holding the gasket and the moving door connected to the pulley box upward.

[0012] In a preferred embodiment, 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 lateral sides of the first short side and the second short side, 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.

[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 fixedly inserted into 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 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 set 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 held on the mounting portion, and the clamping portion is assembled in the transverse direction to the connecting seat of the connecting member.

[0015] In a preferred embodiment, the moving door is a moving 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 a plurality of pulley assemblies are respectively arranged on the door leaves at corners away from the hinge.

[0016] Compared with the prior art, the utility model have following beneficial effect: several the sheave assembly including connecting top rail and moving door's top sheave assembly and connecting bottom rail and moving door's bottom sheave assembly, and each the sheave assembly is equipped with the sheave box of holding on moving door, the moving wheel group of relative sheave box along vertical motion and the elastic component of being connected between sheave box and moving wheel group. In the top sheave assembly, the sheave box holds on the top of moving door, the moving wheel group is held in the top rail, and the moving wheel group is pulled up sheave box and the top of moving door through elastic component, in the bottom sheave assembly, the sheave box holds on the bottom of moving door, the moving wheel group is held in the bottom rail, and the moving wheel group is pushed up sheave box and the bottom of moving door through elastic component. The top sheave assembly and bottom sheave assembly are provided with the upward support force to moving door in vertical direction through its elastic component, and the top sheave assembly and bottom sheave assembly are in the state of adjustable at any time, through changing the spring pressure of elastic component, can adjust the up-down position of moving door in vertical direction. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the perspective view of the cabinet door device in the preferred embodiment of the utility model.

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

[0019] Figure 3 It is Figure 2 the sectional view of the positive top sheave assembly.

[0020] Figure 4 It is Figure 3 the exploded view of the positive top sheave assembly.

[0021] Figure 5 It is Figure 2 the sectional view of the reverse top sheave assembly.

[0022] Figure 6 It is Figure 5 the exploded view of the reverse top sheave assembly.

[0023] Figure 7 It is Figure 2 the sectional view of the positive bottom sheave assembly.

[0024] Figure 8 It is Figure 7 the exploded view of the positive bottom sheave assembly.

[0025] Figure 9 It is Figure 2 the sectional view of the reverse bottom sheave assembly.

[0026] Figure 10 is Figure 9 is an exploded schematic view of the reverse bottom pulley assembly. DETAILED DESCRIPTION

[0027] The technical solutions of the utility model will be further described below in combination with the drawings and through specific embodiments.

[0028] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, if the terms "connection" and the like indicating the connection relationship between components appear, the terms should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication inside two components or the interaction relationship between two components. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0030] Please refer to Figures 1 to 10 The preferred embodiment of the utility model discloses a cabinet door device 100, which is usually applied to a wardrobe of a household product. The wardrobe has a cabinet body and the cabinet door device 100, the cabinet body is used for storing clothes or other articles, and the cabinet door device 100 is used for closing or opening the cabinet body.

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

[0032] The door frame 10 is provided with an upper door frame 11 extending in the transverse direction, left and right door frames 12 and 13 connected to the left and right sides of the upper door frame 11, and a top rail 14 and a bottom rail 15 extending in the transverse direction and parallel to each other. The upper door frame 11 is located above the ground and is arranged parallel to the ground, and the left and right door frames 12 and 13 are arranged parallel to each other and extend vertically along the left and right 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 the present 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 can also be provided with a lower door frame located on the ground, and the bottom rail 15 is installed on the top of the lower door frame.

[0033] The moving door 20 is located between the top rail 14 and the bottom rail 15. In the present embodiment, the top rail 14 and the bottom rail 15 limit and guide the movement of the moving door 20. The moving door 20 is a movable folding door and is used to move and fold on the door frame 10. Specifically, the moving 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 are foldable relative to the hinge 22. In other embodiments, two adjacent door leaves 21 can also be connected by a rotating shaft, a hinge, or the like.

[0034] In combination Figure 1 As shown, the moving door 20 can be moved to any position as needed to ensure that the space inside the cabinet can be opened, thereby facilitating the storage and retrieval of items inside the cabinet and improving the utilization rate and convenience of the furniture. In the present embodiment, the moving door 20 is two, and the two moving doors 20 are arranged side by side in the transverse direction, and the number of door leaves 21 of each moving door 20 is two. In other embodiments, the moving door 20 can be provided with three, four, or any other number of door leaves 21 as needed, and the pulley assembly 30 on each moving door 20 is not limited to two groups, but can also be multiple groups.

[0035] As shown in Figures 3 to 10 The pulley assembly 30 is connected to the moving door 20 and is used to realize the sliding movement of the moving door 20 on the door frame 10. In the present embodiment, a plurality of pulley assemblies 30 are arranged at the corners of the door leaves 21 of the moving door 20 away from the hinge 22. 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 connected between the pulley box 40 and the moving wheel set 50. In the present embodiment, the moving wheel set 50 pulls or pushes the pulley box 40 through the elastic member 60.

[0036] Several of the pulley assemblies 30 include a top pulley assembly 31 connecting the top rail 14 and the moving door 20, and a bottom pulley assembly 32 connecting the bottom rail 15 and the moving door 20. In the top pulley assembly 31, the pulley box 40 is held on the top of the moving door 20, the moving wheel set 50 is clamped on the top rail 14, and the moving wheel set 50 pulls the pulley box 40 and the top of the moving door 20 upward through the elastic member 60; in the bottom pulley assembly 32, the pulley box 40 is held on the bottom of the moving door 20, the moving wheel set 50 is clamped on the bottom rail 15, and the moving wheel set 50 pushes the pulley box 40 and the bottom of the moving door 20 upward through the elastic member 60. In the present embodiment, the top pulley assembly 31 and the bottom pulley assembly 32 both provide upward support to the moving 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 an adjustable state at any time, and the up-and-down position of the moving door 20 can be adjusted in the vertical direction by changing the spring pressure of the elastic member 60.

[0037] On the other hand, each component of the several pulley assemblies 30 is a universal component, and at least two functions of the pulley assemblies can be realized by adjusting the direction or mounting position of each component, 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 to be clamped on the top rail 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 to be clamped on the bottom rail 15.

[0038] The pulley box 40 is provided with a box body 41 and a box cover 42 extending in the vertical direction, a through slot 43 penetrating the box body 41 in the vertical direction, and two transverse grooves 44 located in the box body 41, and the box cover 42 is connected to the box body 41 by screw fitting 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 parallel to each other, and a first long side 413 and a second long side 414 connected to the transverse sides of the first short side 411 and the second short side 412; the through slot 43 penetrates the first short side 411 and the second short side 412 in the vertical direction, and the through slot 43 is located 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 the embodiment, the pulley box 40 is vertically symmetrical, and 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, the forward position of the pulley box 40 is rotated 180° to become the reverse position of the pulley box 40. The pulley box 40 is designed to be vertically symmetrical. By adjusting the left-right direction of the pulley box 40 and the position of the gasket 64 in the pulley box 40, a set of universal components can realize the functions of at least two pulley assemblies, four in the embodiment. The pulley box 40 is also 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 a plurality of moving wheels 52 mounted on the seat body 51. The moving wheels 52 can be provided with two, four or more. In the embodiment, the moving wheels 52 are four and are arranged on the longitudinal sides of the seat body 51. The seat body 51 is provided with a mounting portion 511 extending beyond the first long side 413 in the transverse direction and a clamping portion 512 extending from the mounting portion 511 in the vertical direction. The moving wheels 52 are held on the mounting portion 511 and clamped on the top rail 14 or the bottom rail 15. The clamping portion 512 is assembled on the connecting piece 61 of the elastic component 60 in the transverse direction.

[0041] The elastic component 60 includes a connecting piece 61 connected to the moving wheel set 50, a screw rod 62 accommodated in the through groove 43, a spring 63 sleeved on the screw rod 62, and a gasket 64 clamped in the horizontal groove 44. The connecting piece 61 is arranged in an L shape and is provided with a connecting seat 611 extending in the transverse direction and a protruding portion 612 extending from the connecting seat 611 in the vertical direction. The protruding portion 612 at least partially extends into the through groove 43.

[0042] The connecting seat 611 is provided with an insertion slot (not numbered) extending in the transverse direction. The seat body 51 is provided with clamping protrusions (not numbered) protruding outward from the longitudinal sides of the clamping portion 512. The clamping portion 512 of the seat body 51 is inserted into the connecting seat 611 from one side of the second long side 414 to the side of the first long side 413 in the transverse direction. At this time, the clamping protrusions are accommodated in the insertion slot, and the clamping portion 512 and the connecting seat 611 are fixed together by screw connection.

[0043] The screw rod 62 is vertically extended, and one end of the screw rod 62 is connected to the protruding portion 612 of the connecting member 61 and is provided with a nut 621 at the other end. The protruding portion 612 of the connecting member 61 is connected to the end of the screw rod 62 away from the nut 621. One end of the spring 63 abuts against the washer 64, and the other end abuts against the nut 621 or the protruding portion 612. The pulley assembly 30 is provided with the spring 63, and the spring 63 provides a supporting force for the door leaf 21 of the moving door 20. 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 an adjustable state at any time.

[0044] Please refer to Figures 3 to 6 As shown in the drawings, the pulley assembly 30 is in 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 slot 43. The screw rod 62 is vertically assembled into the through slot 43 from bottom to top and sequentially passes through the spring 63 and the washer 64 until it is connected to the protruding portion 612. The washer 64 is arranged adjacent to the protruding portion 612, that is, the washer 64 is clamped in the transverse slot 44 adjacent to the moving wheel set 50.

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

[0046] Further, the top pulley assembly 31 can be divided into a forward top pulley assembly 311 and a reverse top pulley assembly 312. Please refer to Figure 3 and Figure 4 As shown in the drawings, the top pulley assembly 31 is the forward top pulley assembly 311, at this time, the pulley box 40 is located at the forward position, the screw rod 62 is inserted into the through slot 43 from the second short side 412, and the washer 64 is clamped in the first transverse slot 441. Please refer to Figure 5 and Figure 6As shown, the top pulley assembly 31 is a reverse top pulley assembly 312, the pulley box 40 is in a reverse position, the screw rod 62 is inserted into the through slot 43 from the first short side 411 and the washer 64 is clamped in the second horizontal slot 442. Thus, the forward top pulley assembly 311 and the reverse top pulley assembly 312 are arranged vertically symmetrically along the vertical axis.

[0047] As shown, 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 below the pulley box 40, the connecting member 61 is connected to the upper side of the moving wheel set 50 and the protruding portion 612 extends upwardly into the through slot 43, the screw rod 62 is assembled into the through slot 43 vertically from top to bottom and sequentially passes through the washer 64 and the spring 63 until it is connected to the protruding portion 612. The washer 64 is arranged adjacent to the nut 621, that is, the washer 64 is clamped in the horizontal slot 44 away from the moving wheel set 50.

[0048] The upper end of the spring 63 is connected to the washer 64 and the lower end is connected to the protruding portion 612 of the connecting member 61, the protruding portion 612 pushes the washer 64 upwardly via the spring 63, so that the moving wheel set 50 pushes the pulley box 40 holding the washer 64 and the moving door 20 connected to the pulley box 40 upwardly. Specifically, the spring 63 is always in a compressed state, the moving wheel set 50 at the bottom rail 15 is always pressed on the bottom rail 15, and the connecting member 61 on the moving wheel set 50 is pushed by the elastic force of the spring 63, so that the washer 64 can provide upward supporting force for the pulley box 40, and then the hinge 70 on the pulley box 40 provides upward supporting force for the door leaf 21.

[0049] Further, the bottom pulley assembly 32 can also be divided into a forward bottom pulley assembly 321 and a reverse bottom pulley assembly 322. In combination with 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 a forward position, the screw rod 62 is inserted into the through slot 43 from the first short side 411 and the washer 64 is clamped in the first horizontal slot 441. In combination with 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 a reverse position, the screw rod 62 is inserted into the through slot 43 from the second short side 412 and the washer 64 is clamped in the second horizontal slot 442. Thus, the forward bottom pulley assembly 321 and the reverse bottom pulley assembly 322 are arranged vertically symmetrically along the vertical axis.

[0050] The utility model discloses, several the pulley assembly 30 include the top pulley assembly 31 of connecting top rail 14 and movable door 20 and the bottom pulley assembly 32 of connecting bottom rail 15 and movable door 20 to each pulley assembly 30 all be equipped with the pulley box 40 of holding on movable door 20, the movable wheel group 50 of vertical motion relative to pulley box 40 and the elastic component 60 of connecting between pulley box 40 and movable wheel group 50. In the top pulley assembly 31, the pulley box 40 holds on the top of movable door 20, the movable wheel group 50 holds in the top rail 14, and the movable wheel group 50 is through the elastic component 60 and pulls up the pulley box 40 and the top of movable door 20, in the bottom pulley assembly 32, the pulley box 40 holds on the bottom of movable door 20, the movable wheel group 50 holds in the bottom rail 15, and the movable wheel group 50 is through the elastic component 60 and pushes up the pulley box 40 and the bottom of movable door 20. The top pulley assembly 31 and bottom pulley assembly 32 all provide the support force of going up to movable door 20 in vertical through its elastic component 60, and the top pulley assembly 31 and bottom pulley assembly 32 are in the state of adjustable at any time, through the spring pressure of changing elastic component 60, can adjust the up-down position of movable door 20 in vertical.

[0051] In conclusion, the above is only the preferred embodiment of the utility model, should not be restricted by this, the range of the utility model, namely, all the simple equivalent changes and modification of the contents of the utility model claims and specification made according to the utility model should still belong to the scope of the utility model patent.

Claims

1. A cabinet door arrangement comprising a door frame, at least one moving door located within said door frame, and a plurality of pulley assemblies connected between said door frame and said moving door, said door frame comprising a top rail and a bottom rail extending transversely and parallel to each other, said moving door being located between said top rail and said bottom rail; characterized by: Several of the pulley assemblies include a top pulley assembly connecting the top rail and the moving door and a bottom pulley assembly connecting the bottom rail and the moving door, and each of the pulley assemblies is provided with a pulley box held on the moving door, a moving wheel set moving vertically relative to the pulley box, and an elastic member connected between the pulley box and the moving wheel set; in the top pulley assembly, the pulley box is held on the top of the moving door, the moving wheel set is clamped on the top rail, and the moving wheel set pulls the pulley box and the top of the moving door upward through the elastic member; in the bottom pulley assembly, the pulley box is held on the bottom of the moving door, the moving wheel set is clamped on the bottom rail, and the moving wheel set pushes the pulley box and the bottom of the moving door upward through the elastic member.

2. The cabinet door arrangement of claim 1, wherein: The pulley box is provided with a box body extending vertically, a through slot extending vertically through the box body, and a transverse slot in the box body, the elastic member includes a connecting piece connected to the moving wheel set, a screw received in the through slot, a spring sleeved on the screw, and a gasket clamped in the transverse slot, the connecting piece is provided with a protruding portion extending partially into the through slot, and the protruding portion is connected to a vertical end of the screw, the screw is provided with a nut at a vertical opposite end, and 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 arrangement of claim 2, wherein: In the top pulley assembly, the moving wheel set is above the pulley box, the connecting piece is connected below the moving wheel set, and the protruding portion extends downward into the through slot, the screw is assembled into the through slot from bottom to top in the vertical direction and sequentially passes through the spring and the gasket until connected to the protruding portion, and the screw is threadedly connected to the protruding portion of the connecting piece.

4. The cabinet door arrangement of claim 3, wherein: 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, the nut pushes the gasket upward via the spring, so that the moving wheel set pulls the pulley box holding the gasket and the moving door connected to the pulley box upward.

5. The cabinet door arrangement of claim 2, wherein: In the bottom pulley assembly, the moving wheel set is below the pulley box, the connecting piece is connected above the moving wheel set, and the protruding portion extends upward into the through slot, the screw is assembled into the through slot from top to bottom in the vertical direction and sequentially passes through the gasket and the spring until connected to the protruding portion, and the screw is threadedly connected to the protruding portion of the connecting piece.

6. The cabinet door arrangement of claim 5, wherein: 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 piece, the protruding portion pushes the gasket upward via the spring, so that the moving wheel set pushes the pulley box holding the gasket and the moving door connected to the pulley box upward.

7. The cabinet door arrangement of claim 2, wherein: 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 lateral sides of the first short side and the second short side, 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 arrangement of claim 7, wherein: The pulley box is provided with at least one hinge hole adjacent to the second long side, the pulley assembly comprises a hinge connecting the pulley box and the movable door, one end of the hinge is fixedly inserted into the hinge hole, and the other end is held on the movable door.

9. The cabinet door arrangement of claim 8, wherein: The connecting piece is L-shaped and is provided with a connecting seat extending in the transverse direction, the protruding part is formed by extending from the connecting seat in the vertical direction, the movable wheel set is provided with a seat body and a plurality of movable wheels mounted on the seat body, the seat body is provided with a mounting part extending beyond the first long side in the transverse direction and a clamping part extending from the mounting part in the vertical direction, the movable wheels are held on the mounting part, and the clamping part is assembled on the connecting seat of the connecting piece in the transverse direction.

10. The cabinet door arrangement of claim 1, wherein: 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 a plurality of pulley assemblies are respectively arranged on the corners of the door leaves away from the hinge.

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