Elastic force switching structure and supporting foot stool

Abstract

The elastic force switching structure is provided with a frame, a containing space is formed between the first side and the second side of the frame, a constant force spring set is positioned in the containing space, a constant force spring piece is wound on a constant force spring wheel of the constant force spring set, and the constant force spring wheel is connected with a first shaft rod in a sliding and sleeved mode. The stretching end of the constant force spring piece is connected with a storage wheel, the storage wheel is connected with a second shaft rod in a sliding and sleeving mode, and the second shaft rod is connected with a traction piece in a winding mode; a long guide groove is formed in the large-diameter part and the small-diameter part of the sleeve part so as to limit the constant-force spring piece in a sliding manner; a sliding component of a switching module is connected with the constant-force spring wheel, and the sliding component stops moving through a locking piece, so that the constant-force spring piece is wound on the large-diameter part or the small-diameter part respectively, and the lifting elastic force of a supporting foot stand is adjusted.

Description

Technical Field

[0001] The utility model relates to a switchable elastic force structure and a supporting stand, and more particularly to a structure capable of adjusting the lifting elastic force and being suitable for carrying flat electronic devices of different sizes. 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 upright, 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 allow the pulley to slide along the two sets of slide rails to lift and lower, a lifting module is provided in the lifting bracket. The lifting module is used to balance the weight of the flat electronic devices, 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 stop at any height for convenient use.

[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 causes the thickness of the bracket in this direction to increase, 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 addition to the fact that the same lifting bracket cannot share monitors of different sizes, if a larger monitor is equipped with more than one set of constant force spring groups, the overall volume will be larger. Utility Model Content

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

[0005] One object of the utility model is to provide a switchable elastic force structure and a support stand, which can solve the problem that the structural characteristics of the fixed force spring group of the existing lifting module will increase the overall volume, and the same lifting bracket with fixed elastic force cannot share monitors of different sizes; and can effectively reduce the area of ​​shielding the stretched section of the fixed force spring piece to increase the utilization of space by arranging a parallel fixed force spring wheel and a storage wheel between the two sides of a frame, the fixed force spring wheel is wound with the fixed force spring sheet, the storage wheel is connected with the stretched end of the fixed force spring sheet, a sleeve member is sleeved with the second shaft rod and allows the fixed force spring sheet to pass through, and a switchable module structure is arranged on the side of the frame, so as to increase the utilization of space, and the lifting height is not limited; in addition, by unlocking a locking member to axially push the fixed force spring wheel and the storage wheel, the fixed force spring sheet can be axially moved to be wound on the large diameter part or the small diameter part of the sleeve member respectively, not only can the lifting elastic force be adjusted only by the fixed force spring group, but also it can be suitable for carrying monitors of different sizes, and the overall volume can be relatively reduced to meet the requirements of thinness.

[0006] To achieve the above-mentioned purpose, the switching elastic force structure provided by the utility model mainly includes a frame, a constant force spring group, a sleeve member and a switching module. The frame has a first side and a second side, and a containing space is provided between the first side and the second side; the constant force spring group is positioned in the containing space, the constant force spring group has a constant force spring wheel and a receiving wheel, the constant force spring wheel is wound with the constant force spring sheet, the constant force spring wheel is slidably sleeved with a first shaft rod, and the two ends of the first shaft rod are respectively connected to the first side and the second side; the receiving wheel is connected to a stretching end of the constant force spring sheet, the receiving wheel is slidably sleeved with a second shaft rod, and the two ends of the second shaft rod are respectively connected to the first side and the second side; the second shaft rod is connected to one end of a traction member for winding the traction member; the sleeve member is sleeved with the second shaft rod, the sleeve member has a large diameter portion extending axially, and the large diameter portion has a long guide groove for sliding and limiting the constant force spring sheet; the switching module is connected to the frame, the switching module has a sliding assembly and a locking member, one end of the sliding assembly is connected to the constant force spring wheel, for synchronously moving the constant force spring wheel and the constant force spring sheet, and the locking member is used to stop the movement of the sliding assembly.

[0007] During implementation, the frame includes a main frame portion and a second side panel, the main frame portion has a first side and a second side, the first side has a first side panel, the second side has an upper curved plate and a lower curved plate, the upper curved plate and the lower curved plate are laterally connected to the second side panel, and the second side panel is parallel to the first side panel.

[0008] During implementation, two ends of the first shaft rod are respectively connected to the first side plate and the second side plate, two ends of the second shaft rod are respectively connected to the first side plate and the second side plate, and the first shaft rod is parallel to the second shaft rod.

[0009] During implementation, the utility model also includes a first elastic member, which is a compression spring sleeved on the first shaft rod. One end of the first elastic member presses against one end of the fixed force spring wheel, and the other end of the first elastic member presses against the second side, which is used to push the fixed force spring wheel and the spring sheet.

[0010] During implementation, one end of the sliding assembly has an upward push piece, which is connected to the fixed force spring wheel and is used to synchronously move the fixed force spring wheel and the fixed force spring sheet.

[0011] During implementation, the push-up member is an elongated sleeve having at least one first notch. The push-up member passes through the first side of the frame, and one end of the push-up member presses against the other end of the fixed force spring wheel.

[0012] During implementation, the utility model also includes a second elastic member, which is a compression spring connected to the storage wheel and is used to push the storage wheel and the fixed force spring sheet; the second elastic member is sleeved with the second shaft rod, one end of the second elastic member presses against one end of the storage wheel, and the other end of the second elastic member presses against one end surface of the sleeve member.

[0013] During implementation, one end of the sliding assembly is provided with a push-down member, which is connected to the receiving wheel to synchronously push the receiving wheel and the stretching end of the fixed force spring sheet.

[0014] During implementation, the push-down member is an elongated sleeve having at least one second notch. The push-down member passes through the first side of the frame, and one end of the push-down member presses against the other end of the storage wheel.

[0015] During implementation, the first side of the frame has a first left plate and a first right plate, the sliding assembly includes a movable plate, a positioning groove is provided on the plate surface of the movable plate, and the movable plate has a second left plate and a second right plate, the second left plate is slidably connected to the first left plate, and the second right plate is slidably connected to the first right plate; one end of the locking member is rotatably connected to the first side, and the other end of the locking member has a positioning portion, which is used to rotate the positioning portion to stop the movement of the sliding assembly after the locking member passes through the positioning groove.

[0016] During implementation, a first side of the frame has a limiting hole, a stop portion is provided on the first side around the limiting hole, one end of the locking member passes through the limiting hole, and one end of the locking member has a pressing portion, so that one end of the locking member can be rotated to connect with the first side, and the pressing portion can press the stop portion to stop the rotation.

[0017] During implementation, the sleeve member also has a small diameter portion, which is coaxially arranged on one side of the large diameter portion, and a long guide groove extends from the large diameter portion and is arranged on the small diameter portion, for sliding the limit-fixing force spring sheet.

[0018] The support leg provided by the utility model mainly comprises a switching elastic force structure, a cover plate, a support frame and a sliding member. The cover plate is connected to the other end of the sliding assembly; one side of the support frame has a long vertical groove, and the other side of the support frame has a slot for passing the cover plate; one end of the sliding member has a connecting part, and the connecting part is provided with the long vertical groove; the other end of the sliding member is connected to the other end of the traction member, and 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 inside the support frame, so as to make the sliding member move up and down.

[0019] In order to facilitate a deeper understanding of the utility model, it is described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 It is a three-dimensional exploded view of a preferred embodiment of the supporting tripod of the utility model.

[0022] Figure 2 It is a three-dimensional exploded view of some components of a preferred embodiment of the support tripod of the utility model.

[0023] Figure 3 It is a three-dimensional exploded view of a preferred embodiment of the switchable elastic force structure of the utility model.

[0024] Figure 4 It is a three-dimensional exploded view of some components of a preferred embodiment of the switchable elastic force structure of the utility model.

[0025] Figure 5 It is a three-dimensional exploded view of some components of a preferred embodiment of the switchable elastic force structure of the utility model.

[0026] Figure 6 It is a three-dimensional exploded view of some components of a preferred embodiment of the switchable elastic force structure of the utility model.

[0027] Figure 7 This is a diagram of the preferred embodiment of the utility model, in which the display is stopped at the highest position and the small diameter portion can be wound around the constant force spring sheet.

[0028] Figure 8 This is a diagram of the preferred embodiment of the utility model when the display is stopped at the highest position and the large diameter portion can be wound around the constant force spring sheet.

[0029] Fig. 9 This is a schematic three-dimensional appearance diagram of a preferred embodiment of the present invention when the display is stopped at the highest position and the large diameter portion can be wound around the constant force spring sheet.

[0030] Description of Reference Numerals

[0031] 1: Support tripod;

[0032] 2: Switch the elastic force structure;

[0033] 21: Cover plate;

[0034] 211: Hook;

[0035] 22: support frame;

[0036] 220: Positioning space;

[0037] 221: Long vertical groove;

[0038] 222: slotting;

[0039] 23: sliding part;

[0040] 231: connection part;

[0041] 232: protrusion;

[0042] 24: first slide rail set;

[0043] 241: first slider;

[0044] 242: first rail;

[0045] 25: second slide rail set;

[0046] 251: second slider;

[0047] 252: Second guide rail;

[0048] 3: Framework;

[0049] 31: main frame;

[0050] 32: second side panel;

[0051] 33: first side;

[0052] 331: first side panel;

[0053] 332: first left side plate;

[0054] 333: first right side panel;

[0055] 334: limiting hole;

[0056] 335, 336: convex column;

[0057] 337: stopper;

[0058] 338: first sliding hole;

[0059] 339: second sliding hole;

[0060] 34: Second side;

[0061] 341: Upper curved plate;

[0062] 342: lower curved plate;

[0063] 35: Accommodation space;

[0064] 36: long bottom plate;

[0065] 361: through hole;

[0066] 4: Constant force spring group;

[0067] 41: Fixed force spring wheel;

[0068] 42: Fixed force spring sheet;

[0069] 421: stretching end;

[0070] 43: Storage wheel;

[0071] 44: first shaft;

[0072] 45: first elastic member;

[0073] 46: second shaft;

[0074] 47: second annular plate;

[0075] 471: Second piercing;

[0076] 48: fixing ring;

[0077] 481: Third piercing;

[0078] 5: Sleeve parts;

[0079] 51: Large diameter part;

[0080] 52: small track section;

[0081] 53: long guide groove;

[0082] 54: second elastic member;

[0083] 55: first annular plate;

[0084] 551: first perforation;

[0085] 56: Neck constriction;

[0086] 57: traction parts;

[0087] 6: Switch module;

[0088] 7: Sliding assembly;

[0089] 71: movable board;

[0090] 72: positioning slot;

[0091] 73: push-up piece;

[0092] 74: first extension portion;

[0093] 741: First missing slot;

[0094] 75: push-down member;

[0095] 76: second extension portion;

[0096] 761: Second missing slot;

[0097] 77: second left side plate;

[0098] 771: first guide groove;

[0099] 772, 782: head screws;

[0100] 78: second right side plate;

[0101] 781: second guide groove;

[0102] 79: card hole;

[0103] 8: Locking piece;

[0104] 81: crossbar;

[0105] 82: annular plate;

[0106] 83: Nut;

[0107] 84: pressing part;

[0108] 85: Positioning unit. DETAILED DESCRIPTION

[0109] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0110] The switching elastic force structure of the utility model mainly includes a frame, a constant force spring group, a sleeve member and a switching module. The frame has a first side and a second side, and there is a accommodating space between the first side and the second side; the constant force spring group is positioned in the accommodating space, the constant force spring group has a constant force spring wheel and a receiving wheel, the constant force spring wheel is wound around the constant force spring sheet, and the constant force spring wheel is slidably sleeved with a first shaft rod; the receiving wheel is connected to the tensile end of the constant force spring sheet, the receiving wheel is slidably sleeved with a second shaft rod, and the second shaft rod is connected with one end of a traction member to wind the traction member; the sleeve member is sleeved with the receiving wheel, the sleeve member has a coaxial large diameter part and a small diameter part, and the large diameter part and the small diameter part have a long guide groove on them, so as to allow the constant force spring sheet to pass through and slide to limit the constant force spring sheet; and the switching module has a sliding assembly and a locking member, one end of the sliding assembly is connected to the constant force spring wheel to synchronously move the constant force spring wheel and the constant force spring sheet, and the locking member is used to stop the movement of the sliding assembly. Thus, by axially pushing the fixed force spring wheel and the receiving wheel and then positioning them, the fixed force spring sheet can be respectively wound on the large diameter part or the small diameter part of the sleeve member to adjust the elastic force of the fixed force spring sheet.

[0111] See also Figure 1 , Figure 2 As shown, it is a preferred embodiment of the support stand 1 of the utility model, which mainly includes a switching elastic force structure 2, a cover plate 21, a support frame 22 and a sliding member 23. The switching elastic force structure 2 has a sliding assembly 7, the cover plate 21 has two hooks 211, and the other end of the sliding assembly 7 has two clamping holes 79. The cover plate 21 is correspondingly engaged with the two clamping holes 79 of the sliding assembly 7 through the two hooks 211, so as to be fixedly connected to one end of the sliding assembly 7; the support frame 22 has a left side and a right side parallel to each other, and a positioning space 220 is provided between the left side and the right side. The switchable elastic force structure 2 is accommodated in the positioning space 220, and the left and right sides of the switchable elastic force structure 2 are respectively locked to the left and right sides of the support frame 22; the upper front end of the support frame 22 has an upright long vertical groove 221, and the long vertical groove 221 is connected to the front end of the positioning space 220; the rear side of the support frame 22 has a rectangular slot 222, and the slot 222 is connected to the rear end of the positioning space 220, and the cover plate 21 passes through the slot 222 to the rear; the bottom end of the support frame 22 is installed on a base. During implementation, the bottom end of the support frame 22 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.

[0112] One end of the sliding member 23 has a connecting portion 231, which passes through the elongated vertical groove 221 forward to connect to the rear side of a display; the other end of the sliding member 23 has a protruding portion 232 with a rectangular shape, and the protruding portion 232 is fixedly connected to a pull rope, which serves as a traction member 57; one side of the protruding portion 232 is locked and connected to a first slide bar 241, and the first slide bar 241 and a first guide rail 242 are collectively configured as a first slide rail group 24, and the first guide rail 242 is fixed to the left side surface inside the support frame 22; the other side of the protruding portion 232 is locked and connected to a second slide bar 251, and the second slide bar 251 and a second guide rail 252 are collectively configured as a second slide rail group 25; the second guide rail 252 is fixed to the right side surface inside the support frame 22, so that after pulling the traction member 57, the sliding member 23 can be lifted and moved, and freely stop at a certain height position.

[0113] like Figure 3 to Figure 7 As shown, it is a preferred embodiment of the switch elastic force structure 2 of the utility model, which mainly includes a frame 3, a constant force spring group 4, a sleeve member 5 and a switch module 6. The frame 3 includes a main frame portion 31 and a second side plate 32. The main frame portion 31 is a rectangular frame body. The rear end of the main frame portion 31 is a first side 33. The first side 33 has a first side plate 331. One side of the first side plate 331 has a first left side plate 332 bent backwards. The other side of the first side plate 331 has a first right side plate 333 bent backwards. The first side plate 331 has a limiting hole 334 on its plate surface. The first side plate 331 around the limiting hole 334 has two opposite convex columns (335, 336). The two convex columns (335, 336) are combined to form a stopper 337. The first side plate 331 has two first sliding holes 338 on its plate surface, and the first side plate 331 has two second sliding holes 339 on its plate surface.

[0114] The front side end of the main frame portion 31 is the second side 34, and the second side 34 has an upper bent plate 341 bent downward and a lower bent plate 342 bent upward. The upper bent plate 341 and the lower bent plate 342 are laterally locked and connected to the second side plate 32, so that the second side plate 32 is parallel to the first side plate 331, and a receiving space 35 is formed between the first side plate 331 of the first side 33 and the second side plate 32 of the second side 34; the bottom end of the main frame portion 31 has a long bottom plate 36, and the plate surface of the long bottom plate 36 has a through hole 361, so that the traction member 57 passes downward and is connected to the protruding portion 232 of the sliding member 23.

[0115] The fixed force spring assembly 4 is positioned in the accommodating space 35 of the frame 3; the fixed force spring assembly 4 has a fixed force spring wheel 41, a fixed force spring sheet 42 and a receiving wheel 43. The fixed force spring wheel 41 is wound around the fixed force spring sheet 42, and the fixed force spring wheel 41 is slidably sleeved with a first shaft 44, the two ends of the first shaft 44 are respectively connected to the first side plate 331 and the second side plate 32, and one end of the first shaft 44 is sleeved with a compression spring, which serves as a first elastic member 45; one end of the first elastic member 45 presses against one end of the fixed force spring wheel 41, and the other end of the first elastic member 45 presses against the second side 34 of the frame 3. A tension end 421 of the fixed force spring sheet 42 is connected to the receiving wheel 43, and the receiving wheel 43 is slidably sleeved with a second shaft 46, the second shaft 46 is parallel to the first shaft 44, and the two ends of the second shaft 46 are respectively connected to the first side plate 331 and the second side plate 32.

[0116] The sleeve member 5 is sleeved on the receiving wheel 43. The sleeve member 5 has a coaxial large diameter portion 51 and a small diameter portion 52. The large diameter portion 51 and the small diameter portion 52 have a long guide groove 53 extending axially, so that the fixed force spring piece 42 can pass through the upper and lower parts and the fixed force spring piece 42 can be slidably limited in the long guide groove 53. One end of the second shaft 46 is sleeved with a compression spring, which serves as a second elastic member 54. One end of the second elastic member 54 presses against one end of the receiving wheel 43, and the other end of the second elastic member 54 presses against one end surface of the small diameter portion 52. In addition, a first annular plate 55 is axially provided at one end of the small diameter portion 52, and a first through hole 551 is provided on the plate surface of the first annular plate 55; a necking portion 56 is provided between the first annular plate 55 and the small diameter portion 52 for winding one end of the traction member 57; one end of the second shaft rod 46 has a coaxial second annular plate 47 and a fixing ring 48, wherein the second annular plate 47 is correspondingly locked with the first annular plate 55, and a second through hole 471 is provided on the plate surface of the second annular plate 47, and the fixing ring 48 has a third through hole 481 which penetrates radially; one end of the traction member 57 bypasses the necking portion 56, and then passes through the first through hole 551, the second through hole 471 and the third through hole 481 in sequence, so that one end of the traction member 57 is firmly connected to the second shaft rod 46.

[0117] The switching module 6 has a sliding assembly 7 and a locking member 8. The sliding assembly 7 mainly includes a movable plate 71. The movable plate 71 has two card holes 79 for the card hooks 211 of the cover plate 21 to be correspondingly buckled and fixedly connected; the plate surface of the movable plate 71 has a long vertical positioning groove 72, and one end of the movable plate 71 is horizontally connected to two long sleeves, wherein a long sleeve fixed above the positioning groove 72 is used as an upper push member 73, and the upper push member 73 has two first extensions 74, and two first notches 741 are formed between the two first extensions 74. The first extension 74 passes through the two first side plates 331. The first sliding hole 338 allows one end of the push-up member 73 to press against the other end of the fixed force spring wheel 41, so as to synchronously move the fixed force spring wheel 41 and the fixed force spring sheet 42; and another elongated sleeve fixed below the positioning groove 72 serves as a push-down member 75, and the push-down member 75 has two second extensions 76, and two second notches 761 are formed between the two second extensions 76; the two second extensions 76 pass through the two second sliding holes 339 of the first side plate 331, so that one end of the push-down member 75 presses against the other end of the storage wheel 43, so as to synchronously move the storage wheel 43 and the stretched end 421 of the fixed force spring sheet 42. During implementation, the two first extensions 74 and the corresponding first sliding holes 338 are in an arc shape, and the two second extensions 76 and the corresponding two second sliding holes 339 are also in an arc shape. In other embodiments, they may also be in other shapes such as linear or angular. As long as the shapes of the first extensions 74 and the second extensions 76 do not interfere with the rotation of the first shaft 44 and the second shaft 46, and can achieve the effect of respectively pushing the fixed force spring wheel 41 and the storage wheel 43 to slide, and making the sliding holes relatively limit the extensions, their shapes are not limited.

[0118] One side of the movable plate 71 has a second left side plate 77 bent forward, and a first guide groove 771 is formed on the plate surface of the second left side plate 77, and one end of a head screw 772 passes through the first guide groove 771 to lock the first left side plate 332; the other side of the movable plate 71 has a second right side plate 78 bent forward, and a second guide groove 781 is formed on the plate surface of the second right side plate 78, and one end of another head screw 782 passes through the second guide groove 781 to lock the first right side plate 333; thereby, the second left side plate 77 can be slidably connected to the first left side plate 332, and the second right side plate 78 can be slidably connected to the first right side plate 333.

[0119] The locking member 8 is a "T"-shaped rod, and one end of the locking member 8 has a crossbar 81, which passes through an annular plate 82 and then through a limiting hole 334 on the first side plate 331, and is locked to the first side plate 331 with a nut 83, so that one end of the locking member 8 can be rotated and positioned in the limiting hole 334; a sector-shaped portion radially protrudes from the periphery of the annular plate 82, and the sector-shaped portion serves as a pressing portion 84; the other end of the locking member 8 has a straight rod perpendicular to the crossbar 81, and the straight rod serves as a positioning portion 85. When the positioning portion 85 of the locking member 8 is rotated, the two side ends of the pressing portion 84 press against the two convex columns (335, 336) of the stopper 337, respectively, so that the locking member 8 can be limited to a fixed rotation angle and the locking member 8 stops rotating further.

[0120] Thus, when the display stops at a height position higher than the support frame 22, the fixed force spring sheet 42 and the traction member 57 are respectively wound on the fixed force spring wheel 41 and the second shaft 46. When the user presses the display downward, the pulling direction of the stretching end 421 and the traction member 57 can be changed, so that the fixed force spring sheet 42 is wound on the small diameter portion 52 of the sleeve member 5, and the traction member 57 is stretched downward, so that the display stops at a height position lower than the support frame 22. At this time, since the positioning portion 85 of the locking member 8 and the positioning groove 72 of the movable plate 71 intersect with each other, the sliding assembly 7 can stop moving, and the first elastic member 45 and the second elastic member 54 are respectively in a compressed and stored state.

[0121] like Figure 1 , Figure 8 and Fig. 9As shown, when the display stops at a height position above the support frame 22 and the fixed force spring piece 42 is not wound on the small diameter portion 52 of the sleeve member 5, the user rotates the positioning portion 85 of the locking member 8 to allow the positioning portion 85 and the positioning groove 72 of the movable plate 71 to overlap on the same straight line, and the elastic force of the first elastic member 45 and the second elastic member 54 can be used to restore the fixed force spring wheel 41 and the storage wheel 43 to slide axially on the first shaft rod 44 and the second shaft rod 46 respectively, and at the same time, the fixed force spring piece 42 is moved and positioned from the small diameter portion 52 to the large diameter portion 51; at this time, when the user presses the display downward, the fixed force spring piece 42 can be wound on the large diameter portion 51 of the sleeve member 5, so as to adjust the lifting elastic force, and allow the traction member 57 to be stretched downward, so that the display stops at a height position below the support frame 22. When the user presses the cover plate 21 at the rear side of the support frame 22, the sliding assembly 7, the fixed force spring wheel 41 and the storage wheel 43 can be synchronously driven to allow the fixed force spring sheet 42 to move from the large diameter portion 51 to the small diameter portion 52, and at the same time, by rotating the positioning portion 85 of the locking member 8, the fixed force spring sheet 42 is restored to a state where it can be wound around the small diameter portion 52. In implementation, the sleeve member 5 can also have only the large diameter portion 51, and the large diameter portion 51 has a long guide groove 53 extending axially; the fixed force spring sheet 42 can be directly wound around the storage wheel 43 before being unlocked and during the lifting process; and after unlocking, the fixed force spring assembly 4 is pushed by the switching module 6, so that the fixed force spring sheet 42 passes through the long guide groove 53 to move and position toward the large diameter portion 51, and during the lifting process, the fixed force spring sheet 42 is wound around the large diameter portion 51 to adjust the lifting elastic force, and at the same time simplify the structure of the sleeve member 5.

[0122] Based on the above structure, the utility model is provided with a switching elastic force structure in the supporting tripod, and the switching elastic force structure has a constant force spring wheel, the constant force spring wheel is wound with the constant force spring sheet, the constant force spring wheel is parallel to a storage wheel at a close distance, and the storage wheel is connected to a stretching end of the constant force spring sheet, which can effectively shorten the length of the stretching section of the constant force spring sheet, reduce the area where the supporting tripod shields the stretching section of the constant force spring sheet, thereby increasing the utilization of space and making the overall volume relatively smaller to meet the requirements of thinness; and a sleeve member is sleeved on the outer periphery of the storage wheel, so that the constant force spring sheet passes through and is slidably limited in a long guide groove of the sleeve member, and a switching module is provided on the side of the frame, so that it can be unlocked. After a locking member is released, the fixed force spring wheel and the storage wheel are axially pushed, and the fixed force spring sheet is selectively wound on the large diameter part or the small diameter part of the sleeve member. The lifting elastic force is adjusted by the axial diameter difference between the large and small diameter parts. The lifting elastic force adjustment can be achieved by a switching module and a fixed force spring group, and it can be suitable for carrying displays of different sizes and reducing the overall volume. Furthermore, the first shaft rod and the second shaft rod are respectively provided with a first elastic member and a second elastic member. After the locking member is unlocked, the elastic force is released, so that the fixed force spring wheel, the fixed force spring sheet and the storage wheel are synchronously and quickly moved to a position, which can also make the operation more efficient and allow the fixed force spring sheet to be surely wound on the large diameter part or the small diameter part.

[0123] Although the present invention discloses preferred specific embodiments 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 protection scope of the present invention.

Claims

1. A switching elastic force structure, characterized in that: include: A frame having a first side and a second side, wherein a receiving space is formed between the first side and the second side; A constant force spring group is positioned in the accommodating space, the constant force spring group comprises a constant force spring wheel and a receiving wheel, the constant force spring wheel is wound with the constant force spring sheet, the constant force spring wheel is slidably sleeved with a first shaft rod, and the two ends of the first shaft rod are respectively connected to the first side and the second side; the receiving wheel is connected to a stretching end of the constant force spring sheet, the receiving wheel is slidably sleeved with a second shaft rod, and the two ends of the second shaft rod are respectively connected to the first side and the second side; the second shaft rod is connected to one end of a traction member for winding the traction member; A sleeve member, which is sleeved with the second shaft rod, and the sleeve member has a large diameter portion extending axially, and the large diameter portion has a long guide groove for slidingly limiting the fixed force spring sheet; as well as A switching module is connected to the frame. The switching module has a sliding assembly and a locking piece. One end of the sliding assembly is connected to the fixed force spring wheel for synchronously moving the fixed force spring wheel and the fixed force spring sheet, and the locking piece is used to stop the movement of the sliding assembly.

2. The switching elastic force structure according to claim 1, characterized in that: The frame includes a main frame portion and a second side plate, the main frame portion has the first side and the second side, the first side has a first side plate, the second side has an upper curved plate and a lower curved plate, the upper curved plate and the lower curved plate are laterally connected to the second side plate, and the second side plate is parallel to the first side plate.

3. The switching elastic force structure according to claim 2, characterized in that: The two ends of the first shaft rod are respectively connected to the first side plate and the second side plate, the two ends of the second shaft rod are respectively connected to the first side plate and the second side plate, and the first shaft rod is parallel to the second shaft rod.

4. The switching elastic force structure according to claim 1, characterized in that: It also includes a first elastic member, which is a compression spring sleeved on the first shaft, one end of the first elastic member presses against one end of the fixed force spring wheel, and the other end of the first elastic member presses against the second side, so as to push the fixed force spring wheel and the spring sheet.

5. The switching elastic force structure according to claim 4, characterized in that: One end of the sliding assembly is provided with an upward push piece, which is connected to the fixed force spring wheel and is used for synchronously moving the fixed force spring wheel and the fixed force spring sheet.

6. The switching elastic force structure according to claim 5, characterized in that: The push-up member is an elongated sleeve with at least one first notch. The push-up member passes through the first side of the frame. One end of the push-up member is pressed against the other end of the fixed force spring wheel.

7. The switching elastic force structure according to claim 1, characterized in that: It also includes a second elastic member, which is connected to a compression spring of the storage wheel and is used to push the storage wheel and the fixed force spring sheet; the second elastic member is sleeved with the second shaft rod, one end of the second elastic member is pressed against one end of the storage wheel, and the other end of the second elastic member is pressed against an end surface of the sleeve member.

8. The switching elastic force structure according to claim 7, characterized in that: One end of the sliding assembly is provided with a push-down member, which is connected to the receiving wheel and is used for synchronously pushing the receiving wheel and the stretching end of the fixed force spring sheet.

9. The switching elastic force structure according to claim 8, characterized in that: The push-down member is an elongated sleeve with at least one second notch. The push-down member passes through the first side of the frame, and one end of the push-down member is pressed against the other end of the storage wheel.

10. The switching elastic force structure according to claim 1, characterized in that: The first side of the frame has a first left side plate and a first right side plate, the sliding assembly includes a movable plate, a plate surface of the movable plate has a positioning groove, and the movable plate has a second left side plate and a second right side plate, the second left side plate is slidably connected to the first left side plate, and the second right side plate is slidably connected to the first right side plate; one end of the locking member is rotationally connected to the first side, and the other end of the locking member has a positioning portion, which is used to rotate the positioning portion to stop the movement of the sliding assembly after the locking member passes through the positioning groove.

11. The switching elastic force structure according to claim 10, characterized in that: The first side of the frame has a limiting hole, and the first side around the limiting hole has a stopping portion. One end of the locking member passes through the limiting hole, and the end of the locking member has a pressing portion for rotatably connecting the end of the locking member to the first side, and allowing the pressing portion to press against the stopping portion to stop the rotation.

12. The switching elastic force structure according to any one of claims 1 to 11, characterized in that: The sleeve member also has a small diameter portion, which is coaxially arranged on one side of the large diameter portion. The long guide groove extends from the large diameter portion and is arranged on the small diameter portion for slidingly limiting the constant force spring sheet.

13. A support stand using the switchable elastic force structure as claimed in claim 12, characterized in that: include: a cover plate connected to the other end of the sliding assembly; a support frame, one side of which has an elongated vertical slot, and the other side of which has an opening slot for passing the cover plate; and A sliding member has a connecting portion at one end, and the connecting portion passes through the long vertical groove; the other end of the sliding member is connected to the other end of the traction member, and 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 two sides of the inside of the support frame for the lifting and lowering movement of the sliding member.

14. A support stand using the switchable elastic force structure according to any one of claims 1 to 11, characterized in that: include: a cover plate connected to the other end of the sliding assembly; a support frame, one side of which has an elongated vertical slot, and the other side of which has an opening slot for passing the cover plate; and A sliding member has a connecting portion at one end, and the connecting portion passes through the long vertical groove; the other end of the sliding member is connected to the other end of the traction member, and 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 two sides of the inside of the support frame to enable the sliding member to move up and down.

Images