Lifting hanger

Abstract

The invention provides a lifting hanger. The lifting hanger comprises a first frame assembly, a second frame assembly, a rotating assembly and a balance assembly. The first frame assembly comprises a first frame and a middle connecting plate connected with the first frame, and the first frame assembly is slidably arranged relative to the second frame assembly; the two rotating assemblies are symmetrically arranged in the first direction, each rotating assembly comprises a first rotating piece and a second rotating piece, and the balance assembly comprises two elastic mechanisms symmetrically arranged in the first direction. The rotating assembly enables the first frame to move up and down relative to the second frame under the action of external force and stop at any position, and elastic force generated by the elastic mechanism, the first elastic piece and the second elastic piece is used for counteracting the gravity of the load of the first frame.

Description

Technical Field

[0001] The invention relates to the technical field of display screen mounting accessories, and in particular to a liftable hanging rack. Background Art

[0002] Display screens, such as touch screens and flat-panel TVs, are usually fixed to the wall to save space. Once installed, the installation height of the display screen cannot be adjusted, which can lead to poor user experience due to different user needs. Taking touch screens as an example, fixed-position touch screens cannot meet the operating needs of all user groups. For example, if a minor is short, he or she cannot operate a touch screen installed at a position that matches the height of an adult. Or, taking flat-panel TVs as an example, most users currently choose to fix the TV screen to the wall with a bracket, which can give full play to the advantage of occupying less space. Since the height of the TV cannot be adjusted, the center height of the TV may not be at the same level as the viewer's line of sight when different viewers are watching TV, resulting in poor picture quality, affecting viewing, and causing discomfort to the viewer. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a liftable bracket, so that after the display screen is installed through the bracket, the height can be adjusted to meet the operation or viewing needs of different users. The specific technical solution is as follows:

[0004] The present application provides a liftable hanger, comprising: a first frame assembly, a second frame assembly, a rotating assembly and a balancing assembly; the first frame assembly is slidably arranged relative to the second frame assembly; the first frame assembly comprises a first frame and an intermediate connecting plate connected to the first frame; the rotating assembly is symmetrically arranged in two groups along a first direction, each group of the rotating assembly comprises a first rotating member and a second rotating member, the lower end of the first rotating member is rotatably connected to the bottom of the second frame assembly, the upper end of the first rotating member is rotatably connected to the second rotating member, and the upper end of the second rotating member is rotatably connected to the intermediate connecting plate; the balancing assembly comprises two groups of elastic mechanisms symmetrically arranged along the first direction, the upper end of each group of the elastic mechanisms is respectively connected to the top end of the second frame assembly, the lower end of each group of the elastic mechanisms is connected to the first rotating member corresponding to each other, and the connection point between the lower end of the elastic mechanism and the first rotating member is located between the two ends of the first rotating member.

[0005] The liftable rack provided in this application may also have the following technical features:

[0006] In some embodiments, the balancing assembly further comprises two first elastic members, the upper end of each of the first elastic members being respectively connected to the corresponding first rotating member, and the lower end of each of the first elastic members being respectively connected to the second frame assembly; and / or, the balancing assembly further comprises two second elastic members, the lower end of each of the second elastic members being respectively connected to the corresponding second rotating member, and the upper end of each of the second elastic members being respectively connected to the intermediate connecting plate.

[0007] In some embodiments, the balancing assembly also includes a connecting member, the first rotating member includes protrusions relatively arranged along the width direction of the first rotating member; the second frame assembly includes a second frame and a first connecting plate arranged at the bottom of the second frame, a second rotating shaft is provided on the first connecting plate, the second rotating shaft is located above the protrusion, the connecting member is wound around the second rotating shaft, and one end of the connecting member is connected to the elastic mechanism, and the other end of the connecting member is connected to the protrusion; the connecting member is a chain or a rope.

[0008] In some embodiments, the connecting member is a chain, a gear is provided on the second rotating shaft, and the chain is wound around the gear and meshes with the gear.

[0009] In some embodiments, the liftable bracket further includes two symmetrically arranged first adjusting screws for adjusting the stretching length of the elastic mechanism, and each group of the elastic mechanism is connected to the top end of the second frame via a corresponding first adjusting screw.

[0010] In some embodiments, the first frame is provided with side guide rails, and the extension direction of the side guide rails is parallel to the middle connecting plate; the second frame is fixedly provided with side pulleys, and the side guide rails cooperate with the side pulleys to enable the first frame assembly to slide relative to the second frame assembly.

[0011] In some embodiments, the side pulleys are arranged in two rows along the sliding direction of the first frame assembly, the centers of the two rows of side pulleys are staggered front and back, and each row of side pulleys cooperates with the front side wall or the rear side wall of the side guide rail respectively.

[0012] In some embodiments, a mounting portion is provided on the second frame assembly, and the mounting portion is located above the connection position between the first rotating member and the second frame assembly. The liftable bracket also includes a second adjusting screw, one end of the second adjusting screw is rotatably connected to the mounting portion, and the other end of the second adjusting screw is connected to the first elastic member. The second adjusting screw is adjusted to make the length of the first elastic member adjustable.

[0013] In some embodiments, the first frame is provided with two limit parts, and the two limit parts are respectively arranged at the top and bottom of the first frame, and the bottom of the second frame is provided with a limit matching part that matches with the limit parts, and the limit part cooperates with the limit matching part to limit the sliding stroke of the first frame.

[0014] In some embodiments, the liftable bracket also includes a front cover plate, which covers the front side of the second frame assembly, and a first window is provided on the front cover plate at a position corresponding to the elastic mechanism; a first scale is provided on the front cover plate near the position of the first window along the extension direction of the first window.

[0015] In some embodiments, the liftable bracket also includes a second connecting plate, which is buckled in front of the first frame assembly, and the edge of the second connecting plate is fixedly connected to the second frame assembly, and the second connecting plate is provided with at least two guide pulleys, and the guide pulleys are arranged on both sides of the middle connecting plate, and the surrounding walls of the guide pulleys can abut against the two side walls of the middle connecting plate.

[0016] In some embodiments, a second window is provided on the second connecting plate at a position corresponding to the first elastic member; a second indicator bar is provided on the first elastic member at a position corresponding to the second window, and a second scale is provided on the second connecting plate near the second window along the extension direction of the second window.

[0017] Beneficial effects of the embodiments of the present invention:

[0018] The liftable hanger provided by the embodiment of the present invention has a simple structure, a thinner product, and a stable and smooth lifting process. The rotating assembly includes two symmetrically arranged groups, so that when the rotating assembly drives the middle connecting plate to move, the first frame is subjected to a more uniform force, so that it is more stable when sliding up and down relative to the second frame assembly. The second rotating member is rotatably connected to the first rotating member, and the first rotating member is rotatably connected to the second connecting plate, and the second rotating member is rotatably connected to the middle connecting plate, so that the rotating assembly can move in a direction where the angle between the two gradually decreases under the action of an external force, or can move in a direction where the angle between the two gradually increases, thereby realizing the downward movement or upward movement of the first frame, so that the height of the equipment to be lifted and lowered installed on the first frame can be changed to meet the needs of different users. The elastic mechanism can generate a reverse force in the opposite direction of the movement, and the setting of the balancing assembly can make the display screen stably stop at the position when it is adjusted to any height, and maintain balance. Since the first frame assembly is slidably arranged relative to the second frame assembly, the first frame can slide up and down relative to the second frame assembly under the drive of the rotating assembly, and can stably stop at any position required by the user under the action of the balancing assembly.

[0019] Of course, it is not necessary to achieve all of the advantages described above at the same time to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure of a liftable rack provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 Schematic diagram of the explosion structure of the liftable rack;

[0023] Figure 3a It is a structural schematic diagram of the first frame assembly facing the second frame assembly;

[0024] Figure 3b for Figure 3a An enlarged schematic diagram of the middle part;

[0025] Figure 4 is a schematic diagram of the structure of the first frame assembly at the highest point;

[0026] Figure 5 is a schematic diagram of the structure of the first frame assembly at the lowest point;

[0027] Figure 6 is a cross-sectional view of the first frame assembly at the highest point;

[0028] Figure 7 is a cross-sectional view of the first frame assembly at the lowest point;

[0029] Figure 8 for Figure 2 A magnified schematic diagram of part B;

[0030] Fig. 9 for Figure 2 A magnified schematic diagram of part A;

[0031] Fig.10 is a schematic diagram of the connection structure of the elastic mechanism;

[0032] Fig.11 for Fig.10 Schematic diagram of the exploded structure of the connection structure of the elastic mechanism;

[0033] Fig.12is a structural schematic diagram of the first frame assembly at another viewing angle at the highest point;

[0034] Fig.13 for Fig.12 A magnified schematic diagram of part C;

[0035] Fig.14 is a structural schematic diagram of the first frame assembly at another viewing angle at the lowest point;

[0036] Fig.15 for Fig.14 An enlarged schematic diagram of part D in the middle;

[0037] Fig.16 A schematic diagram of the overall structure of the liftable rack provided in an embodiment of the present application from another perspective;

[0038] Fig.17 for Fig.16 The enlarged schematic diagram of part E in the middle;

[0039] Fig.18 for Fig.16 The enlarged schematic diagram of part F in the middle;

[0040] Fig.19 It is a schematic structural diagram of the first elastic member.

[0041] The reference numerals are as follows:

[0042] First frame assembly 10; first frame 11; first side wall 111; side guide rail 112; limit portion 113; middle connecting plate 12; first hinge point 121; second hinge point 122; hanging arm 13;

[0043] The second frame assembly 20; the second frame 21; the second side wall 211; the side pulley 212; the position-limiting matching portion 213; the first connecting plate 22; the second rotating shaft 221; the gear 2211; the mounting portion 222; the second connecting plate 23; the second window 231; the guide pulley 232; the front cover 24; the first window 241;

[0044] Rotating assembly 30; first rotating member 31; protruding portion 311; first rotating shaft 312; cam 313; second rotating member 32;

[0045] Balance assembly 40; elastic mechanism 41; third elastic member 411; first elastic member 42; threaded sleeve 421; second elastic member 43; connecting member 44; adapter 441; first adjusting screw 45; second adjusting screw 46; first indicator bar 47; first scale 48; second indicator bar 49;

[0046] Limiting assembly 50; first limiting plate 51; second limiting plate 52; limiting member 53; third side wall 531; limiting hole 5311; bottom wall 532; limiting pin 54; limiting groove 55; first direction L; second direction W; third direction H. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0048] The present application provides a liftable rack, such as Figure 1 and Figure 2 As shown, it includes: a first frame assembly 10, a second frame assembly 20, a rotating assembly 30 and a balancing assembly 40. The first frame assembly 10 is slidably arranged relative to the second frame assembly 20. The first frame assembly 10 includes a first frame 11 and an intermediate connecting plate 12 connected to the first frame 11. The rotating assembly 30 is symmetrically arranged in two groups along the first direction L. Each group of rotating assemblies 30 includes a first rotating member 31 and a second rotating member 32. The lower end of the first rotating member 31 is rotatably connected to the bottom of the second frame assembly 20, the upper end of the first rotating member 31 is rotatably connected to the second rotating member 32, and the upper end of the second rotating member 32 is rotatably connected to the intermediate connecting plate 12; the balancing assembly 40 includes two groups of elastic mechanisms 41 symmetrically arranged along the first direction L. The upper end of each group of elastic mechanisms 41 is respectively connected to the top of the second frame assembly 20, and the lower end of each group of elastic mechanisms 41 is connected to the first rotating member 31 corresponding to each other, and the connection point between the lower end of the elastic mechanism 41 and the first rotating member 31 is located between the two ends of the first rotating member 31.

[0049] In this embodiment, the first direction L is a direction perpendicular to the sliding direction, and the second direction W is a sliding direction. Specifically, the first direction L and the second direction W are the length direction and the width direction of the liftable rack, respectively, and the third direction H is the thickness direction of the liftable rack. The second frame assembly 20 is used to be installed on a wall, and the first frame 11 is used to install the equipment to be lifted, such as but not limited to a flat-screen TV, a touch screen, and other display screens. The first frame assembly 10 and the second frame assembly 20 are connected through a rotating assembly 30 and a balancing assembly 40. The rotating assembly 30 includes two symmetrically arranged groups, so that when the rotating assembly 30 drives the middle connecting plate 12 to move, the first frame 11 is subjected to a more uniform force, so that it is more stable when sliding up and down relative to the second frame assembly 20. The second rotating member 32 is rotatably connected to the first rotating member 31, and the first rotating member 31 is rotatably connected to the second connecting plate 23, and the second rotating member 32 is rotatably connected to the middle connecting plate 12, so the rotating assembly 30 can move in the direction of gradually decreasing the angle between the two under the action of external force, or can move in the direction of gradually increasing the angle between the two under the action of external force, so as to realize the downward movement or upward movement of the first frame 11, so that the height of the equipment to be lifted and lowered installed on the first frame 11 can be changed to meet the needs of different users. The elastic mechanism 41 can generate a reverse force in the opposite direction of movement, and the setting of the balancing assembly 40 can make the display screen stably docked at the position when it is adjusted to any height to maintain balance. Since the first frame assembly 10 is slidably arranged relative to the second frame assembly 20, the first frame 11 can slide up and down relative to the second frame assembly 20 under the drive of the rotating assembly 30, and can stably dock at any position required by the customer under the action of the balancing assembly 40.

[0050] The liftable rack provided in the embodiment of the present application relies on the rotating assembly 30 to move the first frame 11, and relies on the balancing assembly 40 to allow it to dock at any position within the adjustable range, and has the advantages of simple structure and easy operation. Figure 2 It can be seen that the elastic mechanism 41 is distributed on both sides of the rotating assembly 30, which can reasonably utilize the space between the first frame assembly 10 and the second frame assembly 20 so that the orthographic projections of the two in the third direction H do not overlap, thereby further reducing the thickness of the liftable bracket.

[0051] More specifically, if Figure 1 , Figure 2As shown, the middle connecting plate 12 is arranged in the middle of the first frame 11 along the second direction W, the first frame 11 includes a hanging wall 13, the hanging arm 13 is arranged on the side of the first side wall 111 of the first frame 11 away from the second frame assembly 20, the first side wall 111 is a two side wall extending along the second direction W of the first frame 11, and the hanging arm 13 is used to hang the equipment to be lifted. The first rotating member 31 and the second rotating member 32 are arranged up and down along the second direction W.

[0052] Furthermore, if Figure 6 , Figure 7 As shown, the balancing assembly 40 also includes two first elastic members 42, the upper end of each first elastic member 42 is respectively connected to the corresponding first rotating member 31, and the lower end of each first elastic member 42 is respectively connected to the second frame assembly 20; optionally, the balancing assembly 40 also includes two second elastic members 43, the lower end of each second elastic member 43 is respectively connected to the corresponding second rotating member 32, and the upper end of each second elastic member 43 is respectively connected to the intermediate connecting plate 12.

[0053] Specifically, combined Figure 3a and Figure 6 As shown, the second rotating member 32 and the middle connecting plate 12 are rotatably connected, for example, by hinges, that is, the second rotating member 32 is fixed to the middle connecting plate 12 via a first hinge point 121, and the second elastic member 43 and the middle connecting plate 12 can also be rotatably connected, for example, by hinges, that is, the second elastic member 43 is fixed to the middle connecting plate 12 via a second hinge point 122. The first elastic member 42 and the second elastic member 43 can be springs.

[0054] In this embodiment, the first elastic member 42 and the second elastic member 43 can effectively pull the first rotating member 31 and the second rotating member 32 respectively, so that the first elastic member 42, the second elastic member 43 and the elastic mechanism 41 resist the gravity of the load hung by the liftable rack. The elastic mechanism 41 and the first elastic member 42 and the second elastic member 43 jointly generate elastic force for offsetting the gravity of the load of the first frame 11, further increasing the weight range of the load that can be lifted by the liftable rack and ensuring the smooth lifting.

[0055] In some embodiments, Figure 3a-Figure 7 As shown, the balancing assembly 40 further includes a connecting member 44, and the first rotating member 31 includes protrusions 311 arranged opposite to each other along the width direction of the first rotating member 31. The second frame assembly 20 includes a second frame 21 and a first connecting plate 22 arranged at the bottom of the second frame 21, a second rotating shaft 221 is arranged on the first connecting plate 22, and the second rotating shaft 221 is located above the protrusion 311, and the connecting member 44 is wound around the second rotating shaft 221, and one end of the connecting member 44 is connected to the elastic mechanism 41, and the other end of the connecting member 44 is connected to the protrusion 311. The connecting member 44 is a chain or a rope.

[0056] In this embodiment, the setting of the connecting member 44 and the second rotating shaft 221 can make the pulling force of the elastic mechanism 41 always maintain the vertical direction. The connecting member 44 changes direction after passing through the second rotating shaft 221, so as to form a pulling force on the first rotating member 31, and enable the connecting member 44 to always maintain a tensioned state, thereby effectively pulling the first rotating member 31.

[0057] As a feasible approach, Figure 6 , Figure 7 As shown, the connecting member 44 can be a chain or a rope. Chains or ropes are easy to change direction, and after changing direction, they are all pulling forces on the second rotating member 32, without bending stress in other directions.

[0058] Furthermore, if Figure 6-Figure 8 As shown, the connecting member 44 is a chain, a gear 2211 is provided on the second rotating shaft 221 , and the chain is wound around the gear 2211 and meshes with the gear 2211 .

[0059] In this embodiment, the chain is meshed with the gear 2211, which has better stability, higher strength, avoids sliding friction, and reduces wear.

[0060] Furthermore, a first rotating shaft 312 is provided between the protruding portions 311 , and the connecting member 44 and the protruding portions 311 are rotationally connected via the first rotating shaft 312 .

[0061] Among them, Figure 6-Figure 8 As shown, the chain and the first rotating shaft 312 can be rotatably connected via the cam 313. While there is enough space to set a connecting hole for installing the chain, the volume of the cam 313 can be minimized to reduce the risk of interference with other components.

[0062] As a concrete and feasible way, Figure 1-Figure 7 As shown, the lower end of the first rotating member 31 is rotatably connected to the first connecting plate 22, the upper end of the first rotating member 31 is rotatably connected to the second rotating member 32, and the upper end of the second rotating member 32 is rotatably connected to the intermediate connecting plate 12; the balancing assembly 40 includes two groups of elastic mechanisms 41, two first elastic members 42 and two second elastic members 43 symmetrically arranged along the first direction L, along the second direction W, the lower end of each group of elastic mechanisms 41 is respectively connected to the top end of the second frame 21, the upper end of each group of elastic mechanisms 41 is connected to the respective corresponding first rotating member 31, the upper end of each first elastic member 42 is respectively connected to the respective corresponding first rotating member 31, and the lower end of each first elastic member 42 is respectively connected to the first connecting plate 22; the lower end of each second elastic member 43 is respectively connected to the respective corresponding second rotating member 32, and the upper end of each second elastic member 43 is respectively connected to the intermediate connecting plate 12.

[0063] In some embodiments, Figure 4-Figure 7 As shown, the liftable bracket also includes two first adjusting screws 45 symmetrically arranged along the first direction L. Each set of elastic mechanisms 41 is connected to the top end of the second frame 21 through a corresponding first adjusting screw 45, and the top end of the first adjusting screw 45 is threadedly connected to the top end of the second frame 21.

[0064] In this embodiment, the first adjusting screw 45 is threadedly connected to the top end of the second frame 21 , and the stretching length of the elastic mechanism 41 can be adjusted by screwing it in or out to adapt to display screens of different weights.

[0065] In some embodiments, Figure 2 , Figure 9-11 As shown, the liftable rack also includes two groups of limit assemblies 50 arranged opposite to the two first adjustment screws 45, each group of limit assemblies 50 includes a first limit plate 51 and a second limit plate 52 arranged oppositely and spaced apart along the first direction L, and a limit member 53 and a limit pin 54 connected to the bottom of the first limit plate 51 and the second limit plate 52, the first limit plate 51 and the second limit plate 52 are fixedly connected to the second frame 21, and the limit member 53 includes a limit pin 54 parallel to the first limit plate 51 and the second limit plate 52. Two third side walls 531 and a bottom wall 532 connected to the two third side walls 531 are provided, the first adjusting screw 45 is threadedly connected to the bottom wall 532, the elastic mechanism 41 is fixedly connected to the bottom wall 532, the two third side walls 531 are provided with limiting holes 5311, the first limiting plate 51 and the second limiting plate 52 are provided with limiting grooves 55 connected to the limiting holes 5311, and the limiting pin 54 passes through the limiting hole 5311 and the limiting groove 55 to limit the rotation of the limiting member 53, thereby limiting the rotation of the elastic mechanism 41.

[0066] In this embodiment, the limiting assembly 50 is used to limit the rotation of the elastic mechanism 41, so that during the adjustment of the first adjusting screw 45, the elastic mechanism 41 will not rotate therewith, thereby facilitating the adjustment of the first adjusting screw 45, wherein the first limiting plate 51 and the second limiting plate 52 are fixedly connected to the second frame 21, and the top ends of the first limiting plate 51 and the second limiting plate 52 may be fixedly connected to the top ends of the second frame 21.

[0067] In some embodiments, the elastic mechanism 41 includes at least two third elastic members 411 , the upper ends of the third elastic members 411 are connected to the bottom wall 532 , and the lower ends of the third elastic members 411 are connected to the connecting member 44 .

[0068] In this embodiment, the elastic mechanism 41 includes two or more third elastic members 411, which can increase the combined force of the elastic mechanism 41 and increase the load-bearing range of the liftable rack. Among them, the bottom end of the third elastic member 411 can be connected to the third elastic member 411 and the connecting member 44 by means of an adapter 441, that is, the two third elastic members 411 are connected to the top of the adapter 441, and the connecting member 44 is connected to the bottom of the adapter 441. Specifically, the adapter 441 can be a strip block. By connecting two or more third elastic members 411 and the connecting member 44 through the adapter 441, it is convenient to keep the elastic force direction of each third elastic member 411 consistent and vertical, so as to maximize the combined force between multiple elastic members and effectively stretch the connecting member 44.

[0069] It is understandable that the third elastic member 411 may be a spring. The elastic mechanism 41 may also have only one third elastic member 411. When the elastic mechanism 41 has only one third elastic member 411, the third elastic member 411 may be directly connected to the connecting member 44.

[0070] In some embodiments, Figure 2 , Figure 3a As shown, the first frame 11 is provided with a side guide rail 112, and the extension direction of the side guide rail 112 is parallel to the middle connecting plate 12; the second frame 21 is fixedly provided with a side pulley 212, and the side guide rail 112 cooperates with the side pulley 212 to enable the first frame assembly 10 to slide relative to the second frame assembly 20.

[0071] In this embodiment, through the cooperation between the side pulley 212 and the side guide rail 112, the side pulley 212 can limit the left and right deviation of the side guide rail 112, so that when the first frame 11 slides relative to the second frame 21, it can slide along a predetermined route to prevent the sliding track from deviating. In addition, when the first frame assembly 10 slides relative to the second frame assembly 20, since the contact area between the side pulley 212 and the side guide rail 112 is small and the side pulley 212 can rotate, the friction between the two can be further reduced, the wear caused by each other can be reduced, and their service life can be extended.

[0072] Specifically, Figure 3aAs shown, the side guide rail 112 is arranged on a side of the first frame 11 close to the second frame 21, and is arranged on the inner side of the first side wall 111. The first side wall 111 is two side walls of the first frame 11 extending along the second direction W. The inner side of the first side wall 111 refers to being located inside the first frame 11 and being arranged close to the first side wall 111. A side pulley 212 is arranged on a side of the second frame 21 close to the first frame 11. The side pulley 212 is arranged on two second side walls 211 of the second frame 21 opposite to the first frame 11, and the opening direction of the side guide rail 112 faces the first side wall 111 on the opposite side, that is, the side guide rail 112 cooperates with the side pulley 212 along the first direction L, which is also conducive to reducing the thickness of the liftable rack.

[0073] It should be noted that the structure for cooperating with the side guide rail 112 in the present application is not limited to the side pulley 212, and can also be set as a long strip protrusion, as long as it can cooperate with the side guide rail 112 to play a limiting role.

[0074] Preferably, the side pulleys 212 are arranged in two rows along the sliding direction of the first frame assembly 10 , the centers of the two rows of side pulleys 212 are staggered front to back, and each row of side pulleys 212 cooperates with the front side wall or the rear side wall of the side guide rail 112 respectively.

[0075] In this embodiment, the side pulleys 212 are arranged in two rows along the sliding direction, i.e., the second direction W, and two adjacent side pulleys 212 are in different rows, and each row of side pulleys 212 cooperates with the side guide rail 112. In this way, the front side wall and the rear side wall of the side guide rail 112 can contact the side pulleys 212, reducing shaking during the up and down sliding of the first frame assembly 10.

[0076] In some embodiments, Figure 6 , Figure 7 As shown, the second frame assembly 20 is provided with a mounting portion 222, the mounting portion 222 is located above the connection position between the first rotating member 31 and the second frame assembly 20, and the first elastic member 42 is rotatably connected to the mounting portion 222. The liftable bracket further includes a second adjusting screw 46, one end of which is rotatably connected to the mounting portion 222, and the other end of which is connected to the first elastic member 42. The second adjusting screw 46 is adjusted so that the length of the first elastic member 42 is adjustable.

[0077] In this embodiment, the first elastic member 42 is connected to the second frame assembly 20, and the second frame assembly 20 is provided with a mounting portion 222 above the connection position between the second rotating member 32 and the second frame assembly 20, so that the component force of the first elastic member 42 can offset part of the gravity of the device to be lifted, and make a certain contribution to the force balance of the liftable rack. The second adjusting screw 46 is provided so that the length of the first elastic member 42 is adjustable, which is convenient for adapting to devices to be lifted of different weights and improving the applicability of the liftable rack.

[0078] Specifically, a mounting portion 222 is provided on the first connecting plate 22 of the second frame assembly 20, a threaded sleeve 421 is fixed to the outside or inside of the first elastic member 42, and the second adjusting screw 46 is threadedly connected to the threaded sleeve 421, so that the second adjusting screw 46 can be screwed in or out along the axial direction of the threaded sleeve 421, thereby adjusting the length of the first elastic member 42.

[0079] In some embodiments, Figure 12-Figure 15 As shown, the first frame 11 is provided with two limit portions 113, and the two limit portions 113 are respectively arranged at the top and bottom of the first frame 11, and the bottom of the second frame 21 is provided with a limit matching portion 213 matching with the limit portion 113, and the limit portion 113 cooperates with the limit matching portion 213 to limit the continued sliding of the first frame 11.

[0080] In this embodiment, the first frame 11 and the second frame 21 are provided with a limit portion 113 and a limit matching portion 213 that can cooperate. When the two cooperate, they can prevent the first frame 11 from continuing to slide, thereby preventing the first frame 11 from sliding beyond the allowable range and causing unnecessary losses.

[0081] The limiting portion 113 may be a limiting block, and the limiting matching portion 213 may also be a limiting step, or the limiting portion 113 may be a limiting step, and the limiting matching portion 213 may be a limiting groove 55 or a limiting hole 5311. Or conversely, the limiting portion 113 may be a limiting groove 55 or a limiting hole 5311, and the limiting matching portion 213 may be a limiting step, as long as the two can cooperate to limit the first frame 11.

[0082] In some embodiments, Figure 1 , Figure 2 and Fig.16 As shown, the liftable rack further includes a front cover plate 24, which covers the front side of the second frame assembly 20, and a first window 241 is provided on the front cover plate 24 at a position corresponding to the elastic mechanism 41. Figure 1 , Figure 2 , Fig.10 , Fig.11 , Fig.16 and Fig.17 As shown, the liftable bracket also includes two sets of limit assemblies 50 arranged opposite to the two sets of first adjusting screws 45 for limiting the rotation of the elastic mechanism 41, the limit assemblies 50 are provided with a first indicator bar 47 at the position corresponding to the first window 241, and the front cover plate 24 is provided with a first scale 48 along the extension direction of the first window 241 near the position of the first window 241.

[0083] In this embodiment, the front cover plate 24 covers the side of the second frame assembly 20 close to the first frame assembly 10, so that the outer surface of the second frame assembly 20 is shielded, which can better protect the internal structure of the liftable rack and further improve the aesthetics of the liftable rack. The first window 241 is convenient for observing the elongation of the first adjusting screw 45, and it can be simply judged whether it matches the weight of the device to be lifted, and the first adjusting screw 45 is adjusted to make the balancing assembly 40 match the weight of the device to be lifted.

[0084] The first scale 48 can be engraved around the first window 241 by silk screen printing or laser printing. The first scale 48 can be the actual weight of the device to be lifted, or have a certain corresponding relationship with the actual weight of the device to be lifted. The weight of the device to be lifted can be obtained according to the position of the first indicator bar 47 and its corresponding scale on the first window 241, so as to judge whether the weight of the device to be lifted exceeds the allowable range, and then decide whether it is necessary to adjust the first adjusting screw 45 so that the elastic mechanism 41 matches the weight of the device to be lifted.

[0085] Specifically, the first indicator bar 47 may be disposed at a position of the limiting member 53 corresponding to the first window 241 .

[0086] Furthermore, if Figure 2 As shown, the edge of the front cover plate 24 is fixedly connected to the second frame 21 ( Figure 2 In order to show the matching relationship between the front cover plate 24 and the first frame 11 , the distance between the front cover plate 24 and the first frame 11 is not increased), and the middle part of the front cover plate 24 is concave to avoid the middle connecting plate 12 .

[0087] In some embodiments, Figure 3a , Figure 3b As shown, the liftable bracket also includes a second connecting plate 23, which is buckled in front of the first frame assembly 10, and the edge of the second connecting plate 23 is fixedly connected to the second frame assembly 20, and the second connecting plate 23 is provided with at least two guide pulleys 232, and the guide pulleys 232 are arranged on both sides of the middle connecting plate 12, and the peripheral walls of the guide pulleys 232 can abut against the two side walls of the middle connecting plate 12.

[0088] In this embodiment, by providing a guide pulley 232 on the second connecting plate 23, the stability of the lifting process of the liftable rack can be improved.

[0089] In addition, the second connecting plate 23 can also cover the first frame 11, so that the outer surface of the second frame assembly 20 is more completely covered, and the appearance flatness of the liftable rack is improved. Among them, the front cover plate 24 and the second connecting plate 23 cover the first frame 11 together, and the orthographic projections of the front cover plate 24 and the second connecting plate 23 on the second frame 21 may not overlap, or may partially overlap. Preferably, the orthographic projections of the front cover plate 24 and the second connecting plate 23 on the second frame 21 do not overlap, which can save materials and is also conducive to reducing the thickness of the liftable rack.

[0090] Furthermore, the first connecting plate 22 is arranged on the side of the second frame 21 away from the second frame assembly 20, and the second connecting plate 23 is arranged on the side of the first frame 11 away from the second frame assembly 20, so that the balancing assembly 40 and the rotating assembly 30 are arranged between the first connecting plate 22 and the second connecting plate 23, which is conducive to thinning the thickness of the liftable bracket, and at the same time can also shield the internal structure, play a role in protecting the internal structure, and can make the appearance of the liftable bracket look more simple and generous.

[0091] More specifically, if Figure 2 As shown, the second connecting plate 23 is fixedly mounted on the second frame assembly 20 by screws on the left and right sides. The second connecting plate 23 is provided with an avoidance portion at a position corresponding to the intermediate connecting plate 12. The avoidance portion is used to avoid the intermediate connecting plate 12, so that the intermediate connecting plate 12 and the second connecting plate 23 can maintain a flat surface after installation, and it is helpful to reduce the overall thickness of the liftable rack. Moreover, when the intermediate connecting plate 12 drives the first frame 11 to move relatively, the second connecting plate 23 can remain stationary. The setting of the avoidance portion prevents interference between the intermediate connecting plate 12 and the second connecting plate 23.

[0092] In some embodiments, Figure 1 , Figure 2 , Fig.16 , Fig.18 and Fig.19 As shown, a second window 231 is provided on the second connecting plate 23 at a position corresponding to the first elastic member 42. Figure 1 , Figure 2 , Fig.16 , Fig.18 and Fig.19 As shown, a second indicator bar 49 is provided at a position of the first elastic member 42 corresponding to the second window 231 , and a second scale is provided at a position of the second connecting plate 23 close to the second window 231 along an extending direction of the second window 231 .

[0093] In this embodiment, the second connecting plate 23 is provided with a second window 231 at a position corresponding to the first elastic member 42. The second window 231 is convenient for observing the elongation of the first elastic member 42, so as to simply judge whether it matches the weight of the equipment to be lifted and whether adjustment is needed, thereby avoiding unnecessary adjustment procedures.

[0094] The second scale can be engraved around the second window 231 by silk screen printing or laser printing. The second scale can be the actual weight of the equipment to be lifted, or there is a certain correspondence with the actual weight of the equipment to be lifted. The weight of the equipment to be lifted can be obtained according to the position of the second indicator bar 49 and its corresponding scale on the second window 231, so as to judge whether the weight of the equipment to be lifted exceeds the allowable range. It can be determined whether the second adjustment screw 46 needs to be adjusted to match the weight of the first elastic member 42 with the weight of the equipment to be lifted according to the actual situation. Specifically, the indicator bar 47 corresponding to the second window 231 can be set at the end of the second window 231 away from the second adjustment screw 46.

[0095] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0096] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A liftable rack, characterized in that: include: A first frame assembly (10), a second frame assembly (20), a rotating assembly (30) and a balancing assembly (40); The first frame assembly (10) is slidably arranged relative to the second frame assembly (20); The first frame assembly (10) comprises a first frame (11) and an intermediate connecting plate (12) connected to the first frame (11); The rotating assembly (30) is symmetrically arranged in two groups along the first direction (L), and each group of the rotating assembly (30) includes a first rotating member (31) and a second rotating member (32), the lower end of the first rotating member (31) is rotatably connected to the bottom of the second frame assembly (20), the upper end of the first rotating member (31) is rotatably connected to the second rotating member (32), and the upper end of the second rotating member (32) is rotatably connected to the middle connecting plate (12); The balancing assembly (40) comprises two groups of elastic mechanisms (41) symmetrically arranged along the first direction (L), the upper end of each group of the elastic mechanisms (41) is respectively connected to the top end of the second frame assembly (20), the lower end of each group of the elastic mechanisms (41) is connected to the first rotating member (31) respectively corresponding to the first rotating member, and the connection point between the lower end of the elastic mechanism (41) and the first rotating member (31) is located between the two ends of the first rotating member (31).

2. The liftable rack according to claim 1, characterized in that: The balancing assembly (40) further comprises two first elastic members (42), the upper end of each of the first elastic members (42) being respectively connected to the first rotating member (31) corresponding thereto, and the lower end of each of the first elastic members (42) being respectively connected to the second frame assembly (20); and / or, The balancing assembly (40) further comprises two second elastic members (43), the lower end of each second elastic member (43) being respectively connected to the corresponding second rotating member (32), and the upper end of each second elastic member (43) being respectively connected to the intermediate connecting plate (12).

3. The liftable rack according to claim 1, characterized in that: The balancing assembly (40) further comprises a connecting member (44), and the first rotating member (31) comprises protrusions (311) arranged opposite to each other along a width direction of the first rotating member (31); The second frame assembly (20) comprises a second frame (21) and a first connecting plate (22) arranged at the bottom of the second frame (21); a second rotating shaft (221) is arranged on the first connecting plate (22); the second rotating shaft (221) is located above the protruding portion (311); the connecting member (44) is arranged around the second rotating shaft (221); one end of the connecting member (44) is connected to the elastic mechanism (41); and the other end of the connecting member (44) is connected to the protruding portion (311); The connecting member (44) is a chain or a rope.

4. The liftable rack according to claim 3, characterized in that: The connecting member (44) is a chain, a gear (2211) is provided on the second rotating shaft (221), and the chain is wound around the gear (2211) and meshes with the gear (2211).

5. The liftable rack according to claim 1, characterized in that: The liftable hanger also includes two symmetrically arranged first adjusting screws (45) for adjusting the stretching length of the elastic mechanism (41), and each group of the elastic mechanism (41) is connected to the top end of the second frame (21) via a corresponding first adjusting screw (45).

6. The liftable rack according to claim 3, characterized in that: The first frame (11) is provided with a side guide rail (112), and the extension direction of the side guide rail (112) is parallel to the middle connecting plate (12); The second frame (21) is fixedly provided with a side pulley (212), and the side guide rail (112) cooperates with the side pulley (212) to enable the first frame assembly (10) to slide relative to the second frame assembly (20).

7. The liftable rack according to claim 6, characterized in that: The side pulleys (212) are arranged in two rows along the sliding direction of the first frame assembly (10), the centers of the two rows of side pulleys (212) are staggered front to back, and each row of side pulleys (212) is respectively matched with the front side wall or the rear side wall of the side guide rail (112).

8. The liftable rack according to claim 2, characterized in that: The second frame assembly (20) is provided with a mounting portion (222), and the mounting portion (222) is located above the connection position between the first rotating member (31) and the second frame assembly (20). The liftable bracket also includes a second adjusting screw (46), one end of the second adjusting screw (46) is rotatably connected to the mounting portion (222), and the other end of the second adjusting screw (46) is connected to the first elastic member (42). The second adjusting screw (46) is adjusted to make the length of the first elastic member (42) adjustable.

9. The liftable rack according to claim 3, characterized in that: The first frame (11) is provided with two limiting parts (113), and the two limiting parts (113) are respectively arranged at the top and the bottom of the first frame (11); the bottom of the second frame (21) is provided with a limiting matching part (213) matching with the limiting part (113), and the limiting part (113) matches with the limiting matching part (213) to limit the sliding stroke of the first frame (11).

10. The liftable rack according to claim 1, characterized in that: The liftable rack further comprises a front cover plate (24), the front cover plate (24) covers the front side of the second frame assembly (20), and a first window (241) is provided on the front cover plate (24) at a position corresponding to the elastic mechanism (41); The front cover plate (24) is provided with a first scale (48) at a position close to the first window (241) along the extension direction of the first window (241).

11. The liftable rack according to claim 2, characterized in that: The liftable hanger also includes a second connecting plate (23), the second connecting plate (23) is buckled in front of the first frame assembly (10), and the edge of the second connecting plate (23) is fixedly connected to the second frame assembly (20), the second connecting plate (23) is provided with at least two guide pulleys (232), the guide pulleys (232) are arranged on both sides of the middle connecting plate (12), and the peripheral wall of the guide pulley (232) can abut against the two side walls of the middle connecting plate (12).

12. The liftable rack according to claim 11, characterized in that: A second window (231) is provided on the second connecting plate (23) at a position corresponding to the first elastic member (42); A second indicator bar (49) is provided at a position of the first elastic member (42) corresponding to the second window (231), and a second scale is provided at a position of the second connecting plate (23) close to the second window (231) along an extension direction of the second window (231).

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