Lifting supporting structure

Abstract

The lifting supporting structure is provided with a supporting frame, a sliding piece is provided with a connecting part, the connecting part is arranged in a long vertical groove of the supporting frame in a penetrating mode, the sliding piece is connected with a first sliding rail set and a second sliding rail set, and the first sliding rail set and the second sliding rail set are fixed to the two sides of the supporting frame respectively. The first constant force spring module is provided with a first constant force spring set, the first constant force spring set is provided with a first shaft rod and a first constant force spring piece, and the two ends of the first shaft rod are connected with the two sides of the supporting frame respectively; the first containing wheel is provided with a first mandrel and a first fixing part, the two ends of the first mandrel are connected with the two sides of the supporting frame respectively, and the first fixing part is connected with the first stretching end of the first constant force spring piece; a traction piece is wound around the first mandrel, one end of the traction piece is connected with the sliding piece, and therefore the overall size can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to a lifting support structure, in particular to a structure that can support a planar electronic device and enable the planar electronic device to be lifted up and down. Background Art

[0002] Since flat electronic devices such as tablet computers, AIO computers or flat monitors cannot stand on their own, they are often supported by a support stand to make the flat electronic devices stand, and a linkage mechanism in a lifting bracket is used to achieve the lifting function. For example, in order to make the flat electronic devices lift smoothly, a set of slide rails are respectively provided on both sides of the pulley in the bracket; and in order to make the pulley lift and slide along the guidance of the two sets of slide rails, a lifting module is provided in the lifting bracket. The weight of the flat electronic devices is balanced by the lifting module, and at the same time, the elastic force of at least a certain force spring group is extended and retracted, so that the flat electronic devices can be stopped at any height for the convenience of personnel.

[0003] However, in actual use, although the above-mentioned linkage mechanism can meet the basic operating requirements, when the constant force spring group is stretched, a special channel needs to be vacated to accommodate the area of ​​the stretched section of the leaf spring, which increases the thickness of the bracket in this direction, and the lifting height is limited by the stretched length of the leaf spring, which cannot meet the thinness requirement of the bracket; in addition, there are monitors of various sizes on the market, and monitors of different sizes are respectively provided with lifting brackets adapted to the elastic force. In this way, the same lifting bracket cannot be shared by monitors of different sizes. Utility Model Content

[0004] In view of this, in order to provide a structure different from the prior art and improve the above-mentioned disadvantages.

[0005] The utility model aims to provide a lifting support structure to solve the problem that the structural characteristics of the constant force spring group of the existing lifting module will increase the overall volume; a first constant force spring group and a first storage wheel are arranged in parallel between the two sides of the support frame, the first fixed part of the first storage wheel is connected to the first tensile end of the first constant force spring member to reel in the first constant force spring member, and a traction member is used to wind up the first spindle of the first storage wheel, and one end of the traction member is connected to the structure of the sliding member, which can effectively reduce the area covering the tensile section of the constant force spring to increase the utilization of space, and the lifting height is not limited, and the overall volume is relatively reduced to meet the requirements of thinness; in addition, a second constant force spring group, a second storage wheel and a switching member are also provided in the support frame, and the switching member can push the second storage wheel to connect or separate it relative to the first storage wheel, which can not only adjust the lifting elastic force, but also be suitable for large-size displays.

[0006] To achieve the above-mentioned purpose, the lifting support structure provided by the utility model mainly includes a support frame, a sliding member and a first constant force spring module. One side of the upper end of the support frame has an elongated vertical groove; one end of the sliding member has a connecting portion, which is inserted into the elongated vertical groove; the other end of the sliding member is respectively connected to a first slide rail group and a second slide rail group, the first slide rail group and the second slide rail group respectively fix the two sides of the support frame for the sliding member to move up and down; the first constant force spring module includes a first constant force spring group, a first receiving wheel and a traction member, the first constant force spring group has a first shaft and a first constant force spring member wound around the first shaft, and the two ends of the first shaft are respectively connected to the two sides of the support frame; the first receiving wheel has a first spindle and a first fixing portion, the first spindle and the first spindle are parallel and juxtaposed, and the two ends of the first spindle are respectively connected to the two sides of the support frame, the first fixing portion is connected to a first tensile end of the first constant force spring member, and the first constant force spring member is wound around the first spindle, and one end of the traction member is connected to the other end of the sliding member.

[0007] During implementation, the other end of the sliding member has a protrusion, one side of the protrusion is connected to the first slide rail group, and the other side of the protrusion is connected to the second slide rail group; one side of the protrusion has a positioning portion, and the positioning portion is connected to one end of the positioning traction member.

[0008] During implementation, the positioning portion includes a through slot and a clamping slot that are interconnected, the traction member has a pull rope, one end of the pull rope has a clamping block, the pull rope passes through the through slot, and the clamping block is limited in the clamping slot.

[0009] During implementation, the axis of the first receiving wheel has a clamping hole, and the outer periphery of the first spindle has a clamping portion, and the clamping portion corresponds to the connected clamping hole, so that the first receiving wheel and the first spindle can rotate synchronously; the first fixed portion includes a first positioning groove, and the first tensioning end of the first constant force spring member has a first wing and a second wing extending in opposite directions, and the first wing and the second wing are limited in the first positioning groove, so that the first fixed portion can be connected to the first tensioning end.

[0010] During implementation, the first spindle includes a first rod portion and a second rod portion extending coaxially, one end of the first rod portion is connected to one side of the support frame, and the traction member is wrapped around the first rod portion; the diameter of the second rod portion is larger than the diameter of the first rod portion, and the outer periphery of the second rod portion has a clamping portion; one end of the first spindle is connected to the other side of the support frame.

[0011] During implementation, the utility model also includes a second constant force spring module and a switching component. The second constant force spring module includes a second constant force spring group and a second storing wheel. The second constant force spring group has a second shaft rod and a second constant force spring member wound around the second shaft rod, and the two ends of the second shaft rod are respectively connected to the two sides of the support frame; the second storing wheel is coaxially connected to the first storing wheel and slidably sleeved on the first spindle, one side of the first storing wheel has a first connecting portion, and one side of the second storing wheel has a second connecting portion corresponding to the first connecting portion, and the outer periphery of the second storing wheel has a second fixing portion, and the second fixing portion is connected to a second tensile end of the second constant force spring member for winding up the second constant force spring member; the switching component is connected to the second constant force spring module for pushing the second constant force spring module so that the second storing wheel is connected or separated relative to the first storing wheel.

[0012] During implementation, the utility model further comprises a second spindle, which is sleeved with a third rod portion of the first spindle in a relatively movable manner, and the second receiving wheel sleeves and positions the second spindle so that the second receiving wheel is coaxially connected to the first receiving wheel.

[0013] During implementation, one end of the switching member has a pushing portion, and the other end of the member has a left support plate and a right support plate parallel to each other, the left support plate has a first axial hole on the plate surface, and the right support plate has a second axial hole on the plate surface; the second shaft rod is provided with a sliding shaft that moves axially, and the constant force spring member is wound around the sliding shaft; the first axial hole and the second axial hole are respectively sleeved with the second shaft rod and clamp the two ends of the sliding shaft to push the second constant force spring member.

[0014] During implementation, one end of the second spindle has a first stop portion, one side of the second receiving wheel has a second stop portion corresponding to the first stop portion, and a third axial hole of the right support plate is sleeved on the second spindle; the other end of the second spindle has an annular groove, which is connected to a buckle and abuts against the outer side of the third axial hole for synchronously pushing the second spindle and the second receiving wheel.

[0015] During implementation, the support frame further includes an inner frame, and the two sides of the inner frame have a left vertical plate and a right vertical plate parallel to each other. The left vertical plate and the right vertical plate are respectively fixedly connected to the two sides of the support frame, and the two ends of the first shaft, the two ends of the second shaft and the two ends of the first spindle are respectively connected to the left vertical plate and the right vertical plate of the inner frame.

[0016] During implementation, the inner frame has a long bottom plate, and the two ends of the long bottom plate in the long direction respectively have a left vertical plate and a right vertical plate. The bottom plate has a limiting groove on its surface for the left support plate and the right support plate to pass through.

[0017] During implementation, the right vertical plate has a positioning protrusion, and the other side of the second storage wheel has a positioning concave portion, and the positioning protrusion extends into the positioning concave portion to limit the second constant force spring module.

[0018] In order to facilitate a deeper understanding of the utility model, it is described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 A three-dimensional schematic diagram of the preferred embodiment of the utility model;

[0021] Figure 2 It is an exploded view of some components of a preferred embodiment of the utility model;

[0022] Figure 3 It is an exploded view of some components of a preferred embodiment of the utility model;

[0023] Figure 4 It is a three-dimensional appearance schematic diagram of the first storage wheel and the second storage wheel of the utility model;

[0024] Figure 5 A side view of a preferred embodiment of the utility model;

[0025] Figure 6 This is a diagram of the use state of the display of the preferred embodiment of the utility model when it is stagnant at the highest position;

[0026] Figure 7 This is a diagram of the use state of the preferred embodiment of the utility model when the display is stagnant at the lowest position;

[0027] Figure 8 This is a diagram showing the use state of the first storage wheel and the second storage wheel of the utility model when they are connected;

[0028] Fig. 9 This is a diagram of the use state of the utility model when the first storage wheel and the second storage wheel are connected and the display is stopped at the lowest position.

[0029] Description of Reference Numerals

[0030] 1. Lifting support structure;

[0031] 2. Support frame;

[0032] 21. Left side panel;

[0033] 22. Right side panel;

[0034] 23. Long vertical groove;

[0035] 3. Sliding parts;

[0036] 31. Connecting part;

[0037] 32. protrusion;

[0038] 321, positioning unit;

[0039] 322, groove;

[0040] 323, card slot;

[0041] 33. The first slide rail assembly;

[0042] 331, first slider;

[0043] 332, first guide rail;

[0044] 34. Second slide rail set;

[0045] 341, second slider;

[0046] 342, second guide rail;

[0047] 4. Internal frame;

[0048] 41. Left vertical board;

[0049] 42. Long bottom plate;

[0050] 421, limit slot;

[0051] 43. Right side stand;

[0052] 431. Position the convex part;

[0053] 5. The first constant force spring module;

[0054] 51. A first constant force spring group;

[0055] 511, first shaft;

[0056] 512, a first constant force spring member;

[0057] 513, first stretching end;

[0058] 514, first wing;

[0059] 515, second wing;

[0060] 52. First collection wheel;

[0061] 521, the first wheel body;

[0062] 522, first spindle;

[0063] 523, first fixing portion;

[0064] 524, card hole;

[0065] 525, first connecting portion;

[0066] 526, first rod;

[0067] 527, second rod;

[0068] 528, third rod;

[0069] 529, clamping part;

[0070] 520, first positioning groove;

[0071] 53. Traction parts;

[0072] 531. Pull rope;

[0073] 532, card block;

[0074] 6. Switching parts;

[0075] 61. Promotion Department;

[0076] 62. Left support plate;

[0077] 621, first shaft hole;

[0078] 63. Right support plate;

[0079] 631, second shaft hole;

[0080] 632, third axis hole;

[0081] 7. Second constant force spring module;

[0082] 71. Second constant force spring group;

[0083] 711, second shaft;

[0084] 712, a second constant force spring member;

[0085] 713, second stretching end;

[0086] 714, first protrusion;

[0087] 715, second protrusion;

[0088] 72. Second collection wheel;

[0089] 73. Second wheel body;

[0090] 731. Position the recess;

[0091] 732, second fixing portion;

[0092] 733, second positioning groove;

[0093] 734, second stopper;

[0094] 735, second connecting portion;

[0095] 74. Second spindle;

[0096] 741, first stopper;

[0097] 742, annular groove;

[0098] 743, buckle;

[0099] 75. Sliding shaft. DETAILED DESCRIPTION

[0100] The lifting support structure of the utility model mainly includes a support frame, a sliding member and a first constant force spring module. One side of the support frame has an elongated vertical groove; one end of the sliding member has a connecting portion, which is inserted into the elongated vertical groove; the other end of the sliding member is respectively connected to a first slide rail group and a second slide rail group, and the first slide rail group and the second slide rail group are respectively fixed to the two sides of the support frame; the first constant force spring module includes a first constant force spring group, a first receiving wheel and a traction member, the first constant force spring group has a first shaft and a first constant force spring member wound around the first shaft, and the two ends of the first shaft are respectively connected to the two sides of the support frame; the first receiving wheel has a first spindle and a first fixing portion, the first spindle and the first spindle are parallel and juxtaposed, and the two ends of the first spindle are respectively connected to the two sides of the support frame, and the first fixing portion is connected to a first tensile end of the first constant force spring member to wind up the first constant force spring member; and the traction member is wound around the first spindle, and one end of the traction member is connected to the other end of the sliding member.

[0101] See also Figure 1-Figure 3 As shown, it is a preferred embodiment of the lifting support structure 1 of the utility model, which mainly includes a support frame 2, a sliding member 3, an inner frame 4, a first constant force spring module 5, a switching member 6 and a second constant force spring module 7. The support frame 2 has a left side plate 21 and a right side plate 22 parallel to each other, and the upper end of the front side of the support frame 2 has a long vertical groove 23, and the bottom end of the support frame 2 is installed on a base. During implementation, the bottom end of the support frame 2 can also be plugged downward on the telescopic bracket or the adjustable support arm, or directly fixed on a desktop or a device through a clamp.

[0102] One end of the sliding member 3 has a connecting portion 31, which passes through the long vertical slot 23 to connect to the rear side of a display. The other end of the sliding member 3 has a rectangular protruding portion 32, and a positioning portion 321 is provided on one side of the protruding portion 32. The positioning portion 321 includes a through slot 322 and a clamping slot 323 that are interconnected. One side of the protruding portion 32 is locked and connected to a first slide bar 331, and the first slide bar 331 and a first guide rail 332 are combined to form a first slide rail set 33, and the first guide rail 332 is fixed to the left side plate 21 of the support frame 2; the other side of the protruding portion 32 is locked and connected to a second slide bar 341, and the second slide bar 341 and a second guide rail 342 are combined to form a second slide rail set 34, and the second guide rail 342 is fixed to the right side plate 22 of the support frame 2, so that the sliding member 3 can be lifted and moved.

[0103] The inner frame 4 is a U-shaped plate, including a left vertical plate 41, a long bottom plate 42 and a right vertical plate 43, wherein the left vertical plate 41 and the right vertical plate 43 are parallel to each other, the left vertical plate 41 is locked outwardly with the left side plate 21 of the support frame 2, and the right vertical plate 43 is locked outwardly with the right side plate 22 of the support frame 2, and one end of the right vertical plate 43 has a positioning protrusion 431 bent inwardly; the long bottom plate 42 has a left vertical plate 41 and a right vertical plate 43 at both ends in the long direction, and a rectangular limiting groove 421 is provided on the plate surface of the long bottom plate 42.

[0104] like Figure 3-Figure 7 As shown, the first constant force spring module 5 is positioned in the inner frame 4. The first constant force spring module 5 includes a first constant force spring group 51, a first receiving wheel 52 and a traction member 53. The first constant force spring group 51 has a first shaft 511 and a first constant force spring member 512 wound around the first shaft 511. The two ends of the first shaft 511 are respectively connected and positioned on the plate surfaces of the left vertical plate 41 and the right vertical plate 43; the first constant force spring member 512 has a first stretching end 513, and the first stretching end 513 has a first wing 514 and a second wing 515 extending in the opposite direction.

[0105] The first storage wheel 52 includes a first wheel body 521, a first spindle 522 and a first fixing portion 523. The axis of the first wheel body 521 has a snap-in hole 524. A side surface of the first wheel body 521 has a plurality of grooves arranged in a circular array, and the plurality of grooves are collectively provided as a first connecting portion 525. The first spindle 522 and the first shaft 511 are parallel and juxtaposed, and the first spindle 522 includes a first rod portion 526, a second rod portion 527 and a third rod portion 528 extending coaxially. One end of the first rod portion 526 is connected and positioned on the board surface of the left vertical plate 41. The diameter of the second rod portion 527 is larger than the diameter of the first rod portion 526. The outer periphery of the second rod portion 527 has a snap-in portion 529. The snap-in portion 529 corresponds to the connected snap-in hole 524, so that the first storage wheel 52 and the first spindle 522 rotate synchronously. One end of the third rod portion 528 is connected and positioned on the board surface of the right vertical plate 43. The first fixing portion 523 is located at the outer periphery of the first receiving wheel 52 , and the first fixing portion 523 has a first positioning groove 520 . The first wing 514 and the second wing 515 are limited in the first positioning groove 520 to connect the first fixing portion 523 and the first tensile end 513 of the first constant force spring component 512 , and to retract the first constant force spring component 512 .

[0106] The traction member 53 has a pull rope 531 , one end of which has a clamping block 532 , and the other end of the pull rope 531 is coupled to and wound around the first rod portion 526 of the first spindle 522 . The pull rope 531 passes through the through slot 322 of the sliding member 3 , and the clamping block 532 is limited in the clamping slot 323 .

[0107] The switching member 6 is a U-shaped plate, and a long protrusion is provided at the bottom of one end of the switching member 6, and the long protrusion serves as a pushing part 61. The other end of the switching member 6 has a left support plate 62 and a right support plate 63 parallel to each other, and the left support plate 62 and the right support plate 63 pass upward through the limiting groove 421 of the long bottom plate 42; the left support plate 62 has a first axial hole 621 on the plate surface, and the right support plate 63 has a second axial hole 631 and a third axial hole 632 spaced apart from each other at the upper and lower sides.

[0108] The second constant force spring module 7 includes a second constant force spring group 71 and a second storage wheel 72. The second constant force spring group 71 has a second shaft 711 and a second constant force spring member 712. The second shaft 711 includes a sliding shaft 75 that is slidably connected. The second constant force spring member 712 is wound around the sliding shaft 75. The two ends of the second shaft 711 are respectively positioned on the plate surfaces of the left vertical plate 41 and the right vertical plate 43, and respectively pass through the first shaft hole 621 of the left support plate 62 and the second shaft hole 631 of the right support plate 63, so that the left support plate 62 and the right support plate 63 clamp the two ends of the sliding shaft 75 respectively, and the second constant force spring member 712 moves with the movement of the switching member 6; the second constant force spring member 712 has a second stretching end 713, and the second stretching end 713 has a first protruding piece 714 and a second protruding piece 715 extending in the opposite direction.

[0109] The second receiving wheel 72 includes a second wheel body 73 and a second spindle 74. One side surface of the second wheel body 73 has a plurality of protrusions arranged in a circular array, and the plurality of protrusions are collectively provided as a second connecting portion 735. The other side surface of the second wheel body 73 is provided with a positioning recess 731 corresponding to the positioning protrusion 431; the outer periphery of the second wheel body 73 has a second fixing portion 732, and the second fixing portion 732 has a second positioning groove 733; the first protrusion 714 and the second protrusion 715 are limited in the second positioning groove 733 to connect the second fixing portion 732 and the second tensile end 713 of the second constant force spring member 712, and to reel up the second constant force spring member 712. The second spindle 74 is a sleeve, and one end of the second spindle 74 has a head, which serves as a first stopper 741. The other end of the second spindle 74 passes through the third shaft hole 632 of the right support plate 63, and the other end of the second spindle 74 has an annular groove 742. The second spindle 74 is sleeved with the third rod 528 of the first spindle 522, so that the second spindle 74 and the first spindle 522 can move relative to each other. In addition, one side of the shaft hole of the second wheel body 73 has a groove, which serves as a second stopper 734. When the second wheel body 73 sleeves the second spindle 74 and passes through the third shaft hole 632, the first stopper 741 is correspondingly abutted against the second stopper 734, and a buckle 743 is buckled on the annular groove 742, so that the buckle 743 is clamped against the outer side of the right support plate 63 to fix the right support plate 63, the second wheel body 73 and the second spindle 74, so that the second wheel body 73 and the second spindle 74 can move synchronously.

[0110] Figures 5 to 7The operation process when a set of constant force spring modules is used, wherein when the display is stopped at a height position higher than the support frame 2, the first constant force spring member 512 of the first constant force spring group 51 and the pull rope 531 of the pulling member 53 are respectively wound around the first shaft 511 and the first rod 526. When the user presses the display downward, the pulling direction of the first tension end 513 and the clamping block 532 can be changed, so that the first constant force spring member 512 is wound inside the first receiving wheel 52, and the pull rope 531 is stretched downward, so that the display is stopped at a height position lower than the support frame 2.

[0111] And as Figure 4 , Figure 8 and Fig. 9 As shown, when the user pushes the pushing portion 61 of the switching member 6 with the right vertical plate 43 toward the left vertical plate 41, the second wheel body 73, the second spindle 74, the sliding shaft 75 and the second constant force spring member 712 are moved synchronously, and the first storage wheel 52 and the second storage wheel 72 can be rotated synchronously by correspondingly inserting the multiple protrusions of the second connecting portion 735 into the multiple grooves of the first connecting portion 525, so that the first constant force spring member 512 and the second constant force spring member 712 are respectively wound in the first storage wheel 52 and the second storage wheel 72, thereby increasing the overall torque to achieve the effect of carrying a heavier display. When the user pushes the pushing part 61 in the opposite direction to separate the second constant force spring module 7 from the first constant force spring module 5 and extends the positioning protrusion 431 into the engaging positioning recess 731, the second connection part 735 of the second wheel body 73 can be prevented from instantly reversing due to the rebound of the pre-stressed second constant force spring component 712 when it is separated from the first connection part 525, so that the torque value of the second constant force spring component 712 can be kept constant.

[0112] It should be particularly noted that although the preferred embodiment of the utility model is described with two groups of constant force spring modules, one or more groups of constant force spring modules can be set as appropriate to allow displays of different sizes to stop freely; in addition, the first constant force spring group 51 and the first storage wheel 52 of the first constant force spring module 5 can also be set upside down, and the first shaft rod 511 and the second shaft rod 711 can also be coaxially arranged, that is, the first constant force spring group 51 and the second constant force spring group 71 are coaxially arranged in parallel in the inner frame 4, and can also be pushed by the switching member 6 to selectively connect or separate the first constant force spring module 5 and the second constant force spring module 7 to adjust the lifting elastic force and effectively reduce the overall volume.

[0113] Based on the above structure, the utility model is provided with at least one constant force spring module in the support frame, wherein the first constant force spring module has a first constant force spring group and a first storage wheel arranged in parallel at a close distance, the first constant force spring group 51 has a first constant force spring member 512, and the first storage wheel rolls up the first stretching end of the first constant force spring member, which can effectively shorten the length of the tensile section of the constant force spring, reduce the area of ​​the support frame shielding the tensile section of the constant force spring, thereby increasing the utilization of space and making the overall volume relatively smaller to meet the requirements of thinness; and a second constant force spring module is arranged on one side of the first constant force spring module, and the second storage wheel can be connected or separated relative to the first storage wheel by pushing a switching member, so that one constant force spring module can be flexibly used, or two constant force spring modules can be used at the same time, so as to be suitable for carrying displays of different sizes and weights; and the sliding member connected to the display is connected to a first spindle on the first wheel body through a pull rope, which amplifies the elastic force through the shaft diameter difference, and can bear a larger load, so as to be suitable for the lifting operation of heavier displays.

[0114] Although the present invention discloses a preferred specific embodiment to achieve the above-mentioned purpose, it is not intended to limit the structural features of the present invention. Any technician in this technical field should know that under the technical spirit of the present invention, any easily conceivable changes or modifications are possible and are all covered by the scope of the patent application of the present invention.

Claims

1. A lifting support structure, characterized in that: include: A support frame, one side of the upper end of which has an elongated vertical groove; A sliding member, one end of which has a connecting portion, the connecting portion is inserted into the elongated vertical slot; the other end of the sliding member is slidably connected to a first slide rail set and a second slide rail set, respectively, the first slide rail set and the second slide rail set are fixed to two sides of the support frame; and A first constant force spring module includes a first constant force spring group, a first storage wheel and a traction member, the first constant force spring group has a first shaft and a first constant force spring member wound around the first shaft, and the two ends of the first shaft are respectively connected to the two sides of the support frame; the first storage wheel has a first spindle and a first fixing portion, the first spindle and the first spindle are parallel and juxtaposed, and the two ends of the first spindle are respectively connected to the two sides of the support frame, and the first fixing portion is connected to a first tensioning end of the first constant force spring member; the traction member is wound around the first spindle, and one end of the traction member is connected to the other end of the sliding member.

2. The lifting support structure according to claim 1, characterized in that: The other end of the sliding member has a protrusion, one side of the protrusion is connected to the first slide rail group, and the other side of the protrusion is connected to the second slide rail group; one side of the protrusion has a positioning portion, and the positioning portion is connected to position one end of the traction member.

3. The lifting support structure according to claim 2, characterized in that: The positioning portion includes a through slot and a clamping slot which are interconnected. The traction member has a pull rope, one end of which has a clamping block. The pull rope passes through the through slot so that the clamping block is limited in the clamping slot.

4. The lifting support structure according to claim 1, characterized in that: The axis of the first receiving wheel has a clamping hole, and the outer periphery of the first spindle has a clamping portion, which is correspondingly connected to the clamping hole so that the first receiving wheel and the first spindle can rotate synchronously; the first fixing portion includes a first positioning groove, and the first tensile end of the first constant force spring member has a first wing and a second wing extending in opposite directions, and the first wing and the second wing are limited in the first positioning groove.

5. The lifting support structure according to claim 4, characterized in that: The first spindle includes a first rod portion and a second rod portion extending coaxially, one end of the first rod portion is connected to one side of the support frame, and the traction member is wound around the first rod portion; the diameter of the second rod portion is greater than the diameter of the first rod portion, and the outer periphery of the second rod portion has the clamping portion; one end of the first spindle is connected to the other side of the support frame.

6. The lifting support structure according to any one of claims 1 to 5, characterized in that: It also includes a second constant force spring module and a switching component, the second constant force spring module includes a second constant force spring group and a second receiving wheel, the second constant force spring group has a second shaft and a second constant force spring member wound around the second shaft, the two ends of the second shaft are respectively connected to the two sides of the support frame; the second receiving wheel is coaxially connected to the first receiving wheel and slidably sleeved on the first spindle, one side of the first receiving wheel has a first connecting portion, one side of the second receiving wheel has a second connecting portion corresponding to the first connecting portion, the outer periphery of the second receiving wheel has a second fixing portion, the second fixing portion is connected to a second tensile end of the second constant force spring member; the switching component is connected to the second constant force spring module for pushing the second constant force spring module to connect or separate the second receiving wheel relative to the first receiving wheel.

7. The lifting support structure according to claim 6, characterized in that: It also includes a second spindle, which is sleeved with a third rod portion of the first spindle in a relatively movable manner, and the second receiving wheel is sleeved and positioned on the second spindle so that the second receiving wheel is coaxially connected to the first receiving wheel.

8. The lifting support structure according to claim 7, characterized in that: One end of the switching member has a pushing portion, and the other end of the switching member has a left support plate and a right support plate parallel to each other, the left support plate has a first axial hole on the plate surface, and the right support plate has a second axial hole on the plate surface; the second shaft rod is provided with a sliding shaft that moves axially, and the second constant force spring member is wound around the sliding shaft; the first axial hole and the second axial hole are respectively sleeved on the second shaft rod and clamp the two ends of the sliding shaft.

9. The lifting support structure according to claim 8, characterized in that: One end of the second spindle has a first stop portion, one side of the second receiving wheel has a second stop portion corresponding to the first stop portion, and a third axial hole of the right support plate is sleeved on the second spindle; the other end of the second spindle has an annular groove connected to a buckle and abuts against the outer side of the third axial hole.

10. The lifting support structure according to claim 8, characterized in that: The support frame also includes an inner frame, and the two sides of the inner frame have a left vertical plate and a right vertical plate parallel to each other. The left vertical plate and the right vertical plate are respectively fixedly connected to the two sides of the support frame, and the two ends of the first shaft, the two ends of the second shaft and the two ends of the first spindle are respectively connected to the left vertical plate and the right vertical plate of the inner frame.

11. The lifting support structure according to claim 10, characterized in that: The inner frame has a long bottom plate, and the two ends of the long bottom plate in the long direction respectively have the left vertical plate and the right vertical plate. The plate surface of the long bottom plate is provided with a limiting groove for the left supporting plate and the right supporting plate to pass through.

12. The lifting support structure according to claim 10, characterized in that: The right side vertical plate has a positioning protrusion, and the other side of the second storage wheel has a positioning concave portion, and the positioning protrusion extends into the positioning concave portion.

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