Supporting foot stool with adjustable elasticity

Abstract

The supporting foot stand with the adjustable elasticity is provided with a frame, a first space is formed between the first side and the second side of the frame, a linkage assembly is positioned in the first space and comprises a connecting piece, the bottom end of the connecting piece is rotationally connected with one end of a rotating piece, a connecting part of the rotating piece is connected with one end of a traction piece, and the traction piece is connected with the first space. The other end of the rotating piece is rotationally connected with a first shaft rod; two ends of the first shaft rod are respectively connected with the first side and the second side; the traction piece bypasses the first shaft rod, and the other end of the traction piece is connected with the bottom end of an elastic piece; the adjusting assembly is connected with the frame, and one end of the adjusting assembly is connected with the top end of the elastic piece to adjust the elastic force of the elastic piece; a sliding assembly is connected with the frame, one end of the sliding assembly is connected with the top end of the connecting piece so as to synchronously move the connecting piece, and the sliding assembly stops moving through the elastic piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to a support foot frame with adjustable elasticity, in particular to a support foot frame with adjustable elasticity for adjusting the lifting elastic support force to adapt to various sizes of flat electronic devices. BACKGROUND

[0002] Flat electronic devices such as tablet computers, AIO computers or flat displays are often supported by a support foot frame to stand upright, and a linkage mechanism in the support foot frame is used to achieve the lifting function. For example, a set of sliding rails is arranged on both sides of a trolley in the foot frame to smoothly lift the flat electronic device. In order to make the trolley slide up and down along the guide of the two sets of sliding rails, a lifting module is arranged in the support foot frame to balance the weight of the flat electronic device, and the elastic extension of at least one constant force spring set makes the flat electronic device stop at any height to facilitate personnel use.

[0003] Although the above-mentioned linkage mechanism can meet the basic operation requirements, when the constant force spring set is stretched, a channel needs to be specially left out to accommodate the area of the sheet spring stretching section, which increases the thickness of the foot frame in this direction and limits the lifting height to the length of the sheet spring stretching section, which cannot meet the thinness requirement of the foot frame. In addition, there are various sizes of displays on the market, and different sizes of displays need to be matched with support foot frames with adaptive elastic force. In addition to the fact that the same support foot frame cannot be used for different sizes of displays, if a larger size display is equipped with more than one constant force spring set, the overall size will be larger.

[0004] To solve the above-mentioned problems, the commonly used support foot frame with adjustable torque mostly uses two sets of constant force springs arranged in the foot frame. For example, the "Lifting support structure" patent case (CN222230002U) shows that by switching an adjustment assembly, the lifting piece is connected to one or two sets of constant force springs to achieve different torque switching. The "Switching elastic force structure and support foot frame" patent case (CN222747015U) shows that a single set of constant force spring is wound around different shaft diameters to achieve torque amplification or reduction. However, the above-mentioned two support foot frame structures with constant force springs to switch torque values have large size, many parts and complex assembly process, which do not meet the current product requirements of thinness and cost reduction. UTILITY MODEL CONTENTS

[0005] Therefore, in order to provide a structure different from the prior art and improve the above-mentioned shortcomings, the inventor has accumulated years of experience and continuous research and development to produce the utility model.

[0006] One objective of this invention is to provide an adjustable elastic support leg, which solves the problem that existing support legs mainly rely on an adjustment component to switch the torque value of at least a certain force spring, resulting in a large overall size, a large number of parts, and a complex assembly process.

[0007] To achieve the aforementioned objectives, the adjustable elastic support frame of this utility model mainly comprises a frame, a linkage assembly, an adjustment assembly, and a sliding assembly. The frame has a first side and a second side that are parallel to each other, with a first space between the first and second sides. The linkage assembly is positioned within the first space and includes a connector, a rotating member, a traction member, and an elastic member. The bottom end of the connector is rotatably connected to one end of the rotating member, and the rotating member has a connecting portion that connects to one end of the traction member. The other end of the rotating member is rotatably connected to a first shaft, with both ends of the first shaft connected to the first and second sides of the frame, respectively. The traction member passes around the first shaft, and its other end is connected to the bottom end of the elastic member. The adjustment assembly is movably connected to the frame, with one end connected to the top of the elastic member for adjusting its elasticity. The sliding assembly is connected to the frame, with one end connected to the top of the connector for synchronously moving the connector, and the elastic member stops the movement of the sliding assembly.

[0008] In implementation, the frame includes a main frame member with a first side and a second side. The first side has a first side plate, and the second side has a second side plate, which is parallel to the first side plate. The top of the main frame member has a top plate with a limiting hole. The adjustment assembly includes an adjustment screw and a movable plate. The adjustment screw passes through the limiting hole and is screwed onto the top of the movable plate. The bottom of the movable plate is connected to the top of the elastic element.

[0009] In practice, the main frame also includes a rear side plate, the surface of which has a limiting groove; the surface of the movable plate has at least one limiting part, one end of which passes through the limiting groove to limit the movement direction of the movable plate.

[0010] In practice, the frame also includes an outer frame piece that fits onto the main frame piece. One side of the outer frame piece has an elongated vertical groove for the other end of the sliding assembly to pass through.

[0011] In implementation, the sliding assembly includes a sliding member, a first slide rail group and a second slide rail group. One end of the sliding member has a connecting part with an elongated vertical groove. The other end of the sliding member is connected to the top of the connecting member. The two sides of the sliding member are respectively connected to the first slide rail group and the second slide rail group. The first slide rail group and the second slide rail group are respectively fixedly connected to the first side and the second side of the frame for the sliding assembly to move up and down.

[0012] In implementation, the utility model also includes a steering positioning piece, the steering positioning piece connects the back side plate of main frame piece, the steering positioning piece has a pulley, the other end of traction piece passes through the pulley and then connects the bottom end of elastic piece.

[0013] In implementation, the connecting piece includes a first long plate and a second long plate which are parallel to each other, a second space is arranged between the first long plate and the second long plate, the top end of the first long plate and the top end of the second long plate are connected to one end of the sliding component, a support rod is arranged at the middle segment position of the connecting piece, the two ends of the support rod are connected to the first long plate and the second long plate respectively, and the bottom end of the first long plate and the bottom end of the second long plate are connected to the top end of the rotating piece.

[0014] In implementation, the rotating piece includes a first short plate and a second short plate which are parallel to each other, a third space is arranged between the first short plate and the second short plate, the top end of the first short plate is rotationally connected to the bottom end of the first long plate, the top end of the second short plate is rotationally connected to the bottom end of the second long plate, the first shaft rod includes a first roller, the first roller is positioned in the third space and is used for allowing the traction piece to pass through, and the third space is provided with a connecting portion, the two ends of the connecting portion are connected to the middle segment positions of the first short plate and the second short plate respectively.

[0015] In implementation, the first shaft rod includes two shaft sleeves, the two shaft sleeves are arranged in the third space and are arranged on the two sides of the first roller respectively, and the outer sides of the two shaft sleeves abut against the inner side surfaces of the first short plate and the second short plate respectively.

[0016] In implementation, the utility model also includes a first adapter plate, a second adapter plate, a first torsion unit and a second torsion unit, the two sides of the first adapter plate are connected to one end of the first shaft rod and the first side of the frame respectively, and the first torsion unit is clamped between the first adapter plate and the first short plate, the two sides of the second adapter plate are connected to the other end of the first shaft rod and the second side of the frame respectively, and the second torsion unit is clamped between the second adapter plate and the second short plate.

[0017] In implementation, the utility model also includes a steering positioning piece, the steering positioning piece connects the frame, the steering positioning piece has a pulley, the other end of the traction piece sequentially passes through the first shaft rod and the pulley and then connects the bottom end of the elastic piece.

[0018] In implementation, the utility model also includes a second shaft rod, the two ends of the second shaft rod are connected to the first side and the second side of the frame respectively, the second shaft rod is parallel to the first shaft rod, and one end of the traction piece sequentially passes through the second shaft rod and the first shaft rod and then connects the connecting portion.

[0019] The utility model discloses a beneficial effect is: through being equipped with a linkage assembly between the both sides of a frame, through the swing of the connecting piece and a rotating piece of linkage assembly relative to frame and a sliding assembly, to replace and shorten longitudinal sliding stroke of rotation, simultaneously make the both ends of a elastic piece connect an adjustment assembly and a traction piece respectively, change the elastic force of elastic piece through the adjustment of adjustment assembly, to be applicable to the lifting and support display of different size, and make the volume of whole relatively smaller, to satisfy the requirement of thin type. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the exploded view of first embodiment of the utility model.

[0021] Figure 2 It is the exploded view of part element of first embodiment of the utility model.

[0022] Figure 3 It is the exploded view of first embodiment of the utility model.

[0023] Figure 4 It is the section view of first embodiment of the utility model.

[0024] Figure 5 It is the use state schematic drawing of first embodiment of the utility model when rotating adjustment screw to make the longitudinal displacement of moving plate.

[0025] Figure 6 It is the use state schematic drawing of sliding piece of first embodiment of the utility model when moving downward.

[0026] Figure 7 It is the use state schematic drawing of sliding piece of first embodiment of the utility model when stagnating in the lowest position.

[0027] Figure 8 It is the use state schematic drawing of display of second embodiment of the utility model when stagnating in the highest position.

[0028] Figure 9 It is the use state schematic drawing of display of second embodiment of the utility model when moving downward.

[0029] Figure 10 It is the use state schematic drawing of display of second embodiment of the utility model when stagnating in the lowest position.

[0030] Figure 11 It is the use state schematic drawing of second embodiment of the utility model when rotating adjustment screw to lengthen elastic piece.

[0031] REFERENCE SIGNS

[0032] 1: support foot stand;

[0033] 2: frame;

[0034] 20: base;

[0035] 21: main frame member;

[0036] 211: opening;

[0037] 212: first side;

[0038] 213: first side edge plate;

[0039] 214: second side;

[0040] 215: second side edge plate;

[0041] 216: first space;

[0042] 217: top plate;

[0043] 2171: limiting hole;

[0044] 218: back side plate;

[0045] 2181: limiting long slot;

[0046] 22: outer frame member;

[0047] 221: long vertical slot;

[0048] 222: round hole portion;

[0049] 3: sliding assembly;

[0050] 31: sliding member;

[0051] 311: engaging portion;

[0052] 312: protruding portion;

[0053] 32: first slide rail set;

[0054] 321: first slide bar;

[0055] 322: first guide rail;

[0056] 33: second slide rail set;

[0057] 331: second slide bar;

[0058] 332: second guide rail;

[0059] 4: linkage assembly;

[0060] 41: connecting member;

[0061] 411: first long plate;

[0062] 412: second long plate;

[0063] 413: support rod;

[0064] 414: second space;

[0065] 415: pivot;

[0066] 42: rotating member;

[0067] 421: first short plate;

[0068] 422: second short plate;

[0069] 423: connecting portion;

[0070] 424: first shaft;

[0071] 425: third space;

[0072] 426: first roller;

[0073] 427: shaft sleeve;

[0074] 43: traction member;

[0075] 44: elastic member;

[0076] 5: first adapter plate;

[0077] 51: first torsion unit;

[0078] 511: first fixed piece;

[0079] 512: first elastic piece;

[0080] 6: second adapter plate;

[0081] 61: second torsion unit;

[0082] 611: second fixed piece;

[0083] 612: second elastic piece;

[0084] 7: adjustment assembly;

[0085] 71: moving plate;

[0086] 711: threaded hole portion;

[0087] 712: limiting portion;

[0088] 72: adjustment screw;

[0089] 721: head portion;

[0090] 8: steering positioning member;

[0091] 81: pulley;

[0092] 9: second shaft. DETAILED DESCRIPTION

[0093] The adjustable elastic supporting foot frame of the utility model mainly includes a frame, a linkage assembly, an adjusting assembly and a sliding assembly. The frame has a first side and a second side which are parallel to each other, and a first space is formed between the first side and the second side; the linkage assembly is positioned in the first space, and mainly includes a connecting piece, a rotating piece, a traction piece and an elastic piece; the bottom end of the connecting piece is rotatably connected to one end of the rotating piece; the middle section of the rotating piece is provided with a connecting portion, and one end of the traction piece is connected to the connecting portion; the other end of the rotating piece is rotatably connected to a first shaft, and the two ends of the first shaft are connected to the first side and the second side of the frame; in this way, the connecting piece and the rotating piece can be swung relative to the frame, and the longitudinal sliding stroke can be replaced and shortened in a rotary manner; the traction piece passes around the first shaft, and the other end of the traction piece is connected to the bottom end of the elastic piece; the adjusting assembly is movably connected to the frame, and one end of the adjusting assembly is connected to the top end of the elastic piece; the sliding assembly is connected to the frame, and one end of the sliding assembly is connected to the top end of the connecting piece, so that the connecting piece can be synchronously moved, and the movement of the sliding assembly is stopped by the elastic piece. In addition, the elastic force of the elastic piece can be changed by the longitudinal movement of the adjusting assembly, so that the adjustable elastic supporting foot frame can be applied to lifting and supporting displays of different sizes.

[0094] Please refer to Figures 1-4 The adjustable elastic supporting foot frame 1 of the utility model includes a frame 2, a sliding assembly 3, a linkage assembly 4, a first adapter plate 5, a second adapter plate 6 and an adjusting assembly 7. The frame 2 is a rectangular shell, and includes a main frame piece 21 and an outer frame piece 22. The front side of the main frame piece 21 is provided with an opening 211, the left side of the main frame piece 21 is a first side 212, the first side 212 is provided with a first side edge plate 213, the right side of the main frame piece 21 is a second side 214, the second side 214 is provided with a second side edge plate 215 which is parallel to the first side edge plate 213, and a first space 216 is formed between the first side edge plate 213 and the second side edge plate 215. The top end of the main frame piece 21 is provided with a top plate 217, the plate surface of the top plate 217 is provided with an upper and lower through hole 2171, the rear side of the main frame piece 21 is provided with a rear side plate 218, and the plate surface of the rear side plate 218 is provided with a longitudinal limiting long groove 2181.

[0095] The outer frame member 22 is sleeved with the main frame member 21, the front side of the outer frame member 22 has an elongated vertical groove 221, the elongated vertical groove 221 passes through the opening 211 on the front side of the main frame member 21 and communicates with the first space 216, and the top surface of the outer frame member 22 has a circular hole part 222 coaxially communicating with the limiting hole 2171 of the main frame member 21. The bottom end of the frame 2 is mounted on a base 20, and in implementation, the bottom end of the frame 2 can also be downwardly sleeved on a telescopic support or an adjustable support arm, or directly fixed on a desktop or a device through a clamp.

[0096] The sliding assembly 3 comprises a sliding member 31, a first sliding rail set 32 and a second sliding rail set 33, the front end of the sliding member 31 has a connecting part 311, the connecting part 311 passes through the elongated vertical groove 221 from the first space 216 to the front to connect the rear side of a display, the rear end of the sliding member 31 has a protruding part 312 in the shape of a cuboid, the protruding part 312 is pivotally connected with the top end of a connecting member 41, one side surface of the sliding member 31 is lockingly connected with a first sliding strip 321, the first sliding strip 321 and a first guide rail 322 are combined to form the first sliding rail set 32, the first guide rail 322 is lockingly fixed on the inner side surface of the first side plate 213, the other side surface of the sliding member 31 is lockingly connected with a second sliding strip 331, the second sliding strip 331 and a second guide rail 332 are combined to form the second sliding rail set 33, the second guide rail 332 is lockingly fixed on the inner side surface of the second side plate 215, so that the sliding member 31 and the display can be simultaneously moved up and down.

[0097] The connecting assembly 4 is positioned in the first space 216 of the main frame member 21, the connecting assembly 4 comprises the connecting member 41, a rotating member 42, a pulling member 43 and an elastic member 44, the connecting member 41 comprises a first long plate 411, a second long plate 412 and a support rod 413, the first long plate 411 and the second long plate 412 are parallel to each other, and the first long plate 411 and the second long plate 412 have a second space 414 therebetween, the first long plate 411 and the second long plate 412 are respectively located on the two sides of the protruding part 312 of the sliding member 31, and the top ends of the first long plate 411 and the second long plate 412 are pivotally connected with the protruding part 312 through a pivot 415, so that when the sliding member 31 moves up and down, the connecting member 41 can be relatively rotated with the sliding member 31 about the pivot 415, and the support rod 413 is located at the middle position of the connecting member 41, and the two ends of the support rod 413 are respectively connected with the first long plate 411 and the second long plate 412, so as to increase the structural strength of the connecting member 41.

[0098] The rotating member 42 comprises a first short plate 421, a second short plate 422, a connecting portion 423 and a first shaft 424, wherein the first short plate 421 and the second short plate 422 are parallel to each other, the first short plate 421 and the second short plate 422 have a third space 425 therebetween, the top end of the first short plate 421 is rotatably connected to the bottom end of the first long plate 411, and the top end of the second short plate 422 is rotatably connected to the bottom end of the second long plate 412; the third space 425 has a straight rod therein, which is the connecting portion 423, the two ends of the connecting portion 423 are connected to the middle positions of the first short plate 421 and the second short plate 422 respectively, in implementation, the connecting portion 423 can also be arranged at one end close to the connecting member 41 or at one end close to the first shaft 424, and the connecting portion 423 is not on the same axis as the first shaft 424. The first shaft 424 comprises a first roller 426 and two shaft sleeves 427, the first roller 426 and the shaft sleeves 427 are positioned in the third space 425, the shaft sleeves 427 are arranged on the two sides of the first roller 426 respectively, the outer sides of the two shaft sleeves 427 abut against the inner sides of the first short plate 421 and the second short plate 422 respectively, so as to strengthen the structure to prevent the first shaft 424 from being deformed due to long-term bearing.

[0099] The traction member 43 is a pull rope, one end of the traction member 43 is connected to the connecting portion 423 of the rotating member 42, the other end of the traction member 43 is downwardly wound around the first roller 426 of the first shaft 424, sequentially passes through the third space 425 and the second space 414, and then extends upwardly to connect the bottom end of a tension spring, in implementation, the tension spring serves as the elastic member 44.

[0100] The first adapter plate 5 and the second adapter plate 6 are transverse plates, the two sides of the first adapter plate 5 are connected to one end of the first shaft 424 and the first side edge plate 213 of the frame 2 respectively, a first fixing piece 511 and a plurality of first elastic pieces 512 are clamped between the first adapter plate 5 and the first short plate 421, in implementation, the first fixing piece 511 and the plurality of first elastic pieces 512 are combined as a first torsion unit 51; the two sides of the second adapter plate 6 are connected to the other end of the first shaft 424 and the second side edge plate 215 of the frame 2 respectively, a second fixing piece 611 and a plurality of second elastic pieces 612 are clamped between the second adapter plate 6 and the second short plate 422, in implementation, the second fixing piece 611 and the plurality of second elastic pieces 612 are combined as a second torsion unit 61. In this way, the rotating frictional torque can be increased through the first torsion unit 51 and the second torsion unit 61, so that the first short plate 421 and the second short plate 422 can stably and smoothly rotate, and the sliding member 31 and the display can be freely stopped at a certain height position.

[0101] The adjusting assembly 7 comprises a moving plate 71 and an adjusting screw 72. The moving plate 71 is a longitudinal standing plate formed by bending a sheet metal. The top surface of the moving plate 71 has a threaded hole part 711. A plurality of head screws are screwed on the surface of the moving plate 71 and pass through the limiting long grooves 2181 on the rear side of the main frame 21, so as to limit the moving direction of the moving plate 71. In practice, the head screws serve as limiting parts 712, and the bottom end of the surface of the moving plate 71 hooks the top end of the elastic member 44. The adjusting screw 72 is a head screw rod. The head 721 of the adjusting screw 72 presses downward to limit the top plate 217 of the main frame 21. The rod body of the adjusting screw 72 passes through the round hole part 222 of the outer frame 22 and the limiting hole 2171 of the main frame 21 in sequence, and then is screwed in the threaded hole part 711 of the moving plate 71. Thus, as shown in Figure 4 、 Figure 5 , when the adjusting screw 72 is rotated to make the moving plate 71 longitudinally displace, the elastic member 44 is stretched or relaxed, and the elastic tension of the elastic member 44 is adjusted, so as to be suitable for lifting and supporting display devices of different sizes.

[0102] Please refer to Figure 4 、 Figure 6 and Figure 7 , when the display device is stopped at a higher position of the frame 2, the pulling member 43 passes around the first roller 426 of the first shaft 424 downward and connects the elastic member 44. When the user presses the display device downward, the connecting member 41 is pushed downward by the sliding member 31, the connecting member 41 and the rotating member 42 are relatively rotated and swung, the pulling direction of the pulling member 43 is changed, and the display device is stopped at a lower position of the frame 2.

[0103] Figures 8-10 The second embodiment of the adjustable elastic supporting foot stand 1 of the utility model is different from the first embodiment in that the utility model further comprises a turning positioning member 8 and a second shaft 9. The turning positioning member 8 is connected to the rear plate 218 of the main frame 21 and has a pulley 81. The two ends of the second shaft 9 are connected to the first side plate 213 and the second side plate 215 of the main frame 21, respectively. The second shaft 9 is parallel to the first shaft 424. One end of the pulling member 43 is connected to the connecting part 423 of the rotating member 42. The other end of the pulling member 43 passes around the first roller 426 and the second shaft 9 in sequence and then passes around the pulley 81 of the turning positioning member 8 to connect the bottom end of the elastic member 44. The pulling direction of the pulling member 43 can be changed, and the display device can be stopped at a height position. As shown in Figure 11 , when the adjusting screw 72 is rotated to make the moving plate 71 longitudinally displace upward, the elastic member 44 can be lengthened to increase the elastic tension, so as to be suitable for lifting and supporting heavier display devices.

[0104] Based on the above structure, the utility model is equipped with a linkage assembly between the both sides of the frame, and swings relative to the frame and the moving plate through the connecting piece and the rotating piece, that is, the original linear moving mode is replaced by the rotating mode, so as to shorten the longitudinal sliding stroke, make the overall volume relatively smaller, and meet the requirement of thinning; during the manufacturing process, the sliding assembly and the linkage assembly can be assembled first to form a module, then the module is fixedly connected into the main frame through the first rotating plate, the second rotating plate and the screw and the like locking pieces, so as to simplify the assembly process; an adjusting assembly is connected to the frame, the adjusting assembly comprises a moving plate and an adjusting screw, the both ends of the moving plate are connected to the adjusting screw and one end of the elastic piece respectively, then the moving plate can be longitudinally displaced along the support by rotating the adjusting screw, and the elastic piece is stretched or relaxed to adjust the elastic force, so as to be applicable to lifting and supporting displayers of different sizes / weights; in addition, a plurality of longitudinal interval limiting parts are arranged on the surface of the moving plate, and the plurality of limiting parts are connected to the limiting long groove at the rear side of the limiting main frame 21, so as to guide and limit the moving direction of the moving plate, and the user can observe the corresponding weight position of the displayer; at the same time, as shown in the second embodiment, a pulley and / or a second shaft rod are arranged between the elastic piece and the rotating piece, so as to maintain the stretching amount of the elastic piece in the minimum state to avoid elastic fatigue, prolong the service life, and avoid the interference between the elastic piece and the pull rope and the support rod, so as to make the operation more smooth.

[0105] The utility model discloses although the preferred embodiment for realizing the above-mentioned purpose is disclosed, but it is not used to limit the structural features of the utility model, any person skilled in the art should know that under the technical spirit of the utility model, any easily thought change or modification is possible, and all are covered in the patent application range of the utility model.

Claims

1. An adjustable stiffness support leg, characterized by, include: A frame having a first side and a second side that are parallel to each other, with a first space between the first side and the second side; A linkage assembly is positioned within the first space. The linkage assembly includes a connector, a rotating member, a traction member, and an elastic member. The bottom end of the connector is rotatably connected to one end of the rotating member. The rotating member has a connecting portion that connects to one end of the traction member. The other end of the rotating member is rotatably connected to a first shaft. The two ends of the first shaft are respectively connected to the first side and the second side of the frame. The traction member passes around the first shaft, and the other end of the traction member is connected to the bottom end of the elastic member. An adjustment component, movably connected to the frame, one end of which is connected to the top of the elastic element for adjusting the elastic force of the elastic element; and A sliding assembly is connected to the frame, one end of which is connected to the top of the connector for synchronous movement of the connector, and the movement of the sliding assembly is stopped by the elastic element.

2. The adjustable resistance support leg of claim 1, wherein, The frame includes a main frame member having a first side and a second side. The first side has a first side plate, and the second side has a second side plate parallel to the first side plate. The top of the main frame member has a top plate with a limiting hole. The adjustment assembly includes an adjustment screw and a movable plate. The adjustment screw passes through the limiting hole and is screwed onto the top of the movable plate. The bottom of the movable plate is connected to the top of the elastic member.

3. The adjustable resistance support leg of claim 2, wherein, The main frame also includes a rear side plate, the surface of which has a limiting groove; the surface of the movable plate has at least one limiting part, one end of which passes through the limiting groove to limit the movement direction of the movable plate.

4. The adjustable elastic support frame as described in claim 2, characterized in that, The frame also includes an outer frame that fits onto the main frame, and one side of the outer frame has an elongated vertical groove for the other end of the sliding assembly to pass through.

5. The adjustable elastic support frame as described in claim 4, characterized in that, The sliding assembly includes a slider, a first slide rail assembly, and a second slide rail assembly. One end of the slider has a connecting portion through which the elongated vertical groove passes. The other end of the slider is connected to the top of the connecting member. The two sides of the slider are respectively connected to the first slide rail assembly and the second slide rail assembly. The first slide rail assembly and the second slide rail assembly are respectively fixedly connected to the first side and the second side of the frame for the sliding assembly to move up and down.

6. The adjustable elastic support frame as described in claim 3, characterized in that, It also includes a steering positioning component that is connected to the rear side plate of the main frame; the steering positioning component has a pulley, and the other end of the traction component passes over the pulley and is then connected to the bottom end of the elastic component.

7. The adjustable elastic support frame as described in claim 1, characterized in that, The connector includes a first long plate and a second long plate that are parallel to each other, with a second space between the first long plate and the second long plate. The top ends of the first long plate and the second long plate are connected to one end of the sliding assembly. A support rod is provided in the middle section of the connector, with both ends of the support rod connected to the first long plate and the second long plate, respectively. The bottom ends of the first long plate and the second long plate are connected to the top end of the rotating component, respectively.

8. The adjustable elastic support frame as described in claim 7, characterized in that, The rotating component includes a first short plate and a second short plate that are parallel to each other, with a third space between the first short plate and the second short plate. The top end of the first short plate is rotatably connected to the bottom end of the first long plate, and the top end of the second short plate is rotatably connected to the bottom end of the second long plate. The first shaft includes a first roller, which is positioned within the third space for the traction component to pass around. The third space has a connecting portion, with both ends of the connecting portion connected to the middle sections of the first short plate and the second short plate, respectively.

9. The adjustable elastic support frame as described in claim 8, characterized in that, The first shaft includes two bushings, which are disposed in the third space and respectively located on both sides of the first roller. The outer sides of the two bushings respectively abut against the inner side of the first short plate and the inner side of the second short plate.

10. The adjustable elastic support frame as described in claim 8, characterized in that, It also includes a first adapter plate, a second adapter plate, a first torque unit and a second torque unit. The two sides of the first adapter plate are respectively connected to one end of the first shaft and the first side of the frame, and the first torque unit is sandwiched between the first adapter plate and the first short plate. The two sides of the second adapter plate are respectively connected to the other end of the first shaft and the second side of the frame, and the second torque unit is sandwiched between the second adapter plate and the second short plate.

11. The adjustable elastic support frame as described in claim 1, characterized in that, It also includes a steering positioning component connected to the frame; the steering positioning component has a pulley, and the other end of the traction component passes sequentially around the first shaft and the pulley before connecting to the bottom end of the elastic component.

12. The adjustable elastic support frame as described in claim 1 or 11, characterized in that, It also includes a second shaft, the two ends of which are respectively connected to the first side and the second side of the frame, and the second shaft is parallel to the first shaft; one end of the traction member passes around the second shaft and the first shaft in sequence, and then connects to the connecting part.

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