Lifting platform

Abstract

The utility model provides a lifting platform, which belongs to the technical field of foot rests and comprises a top frame and a bottom frame, the top frame and the bottom frame are connected through a shear-type structure, a first side of the shear-type structure is rotatably connected with the top frame and the bottom frame, and a second side of the shear-type structure is matched with the top frame and the bottom frame in a sliding mode. The adjustable assembly comprises a friction rod, one end of which is connected with the second side of the shear-type structure; the friction structure is movably matched with the friction rod, the friction structure is provided with an unlocking position capable of sliding relative to the friction rod and a locking position incapable of moving relative to the friction rod, and when the friction structure is located at the unlocking position, the second side of the shear type structure can slide relative to the top frame and the bottom frame; one end of the triggering piece serves as a triggering end, the other end of the triggering piece is connected with or abuts against the friction structure, and the position of the friction structure can be changed to the unlocking position by pressing the triggering end. The stepless adjusting device can achieve stepless adjustment of products, and is simple in adjusting structure, low in cost and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of footrests, and particularly relates to a lifting platform. Background Art

[0002] At present, a footrest is a commonly used auxiliary office furniture for placing feet or calves to relax leg muscles and relieve fatigue. At present, a scissor-lift footrest appears on the market. Such a footrest mainly borrows the structure of a scissor-lift platform. Generally, one side of the scissor structure is fixed and the other side slides to achieve lifting. When the height of the lifting platform needs to be adjusted, it is generally achieved by adjusting the gear between a buckle and a card slot. For example, a lifting workbench disclosed in Chinese Patent (CN210433048U) realizes the adjustment of the workbench height through the clamping cooperation between the lock teeth on the lock bar and the lock buckle.

[0003] However, this adjustment method of the footrest with the above similar structure cannot achieve stepless adjustment on the one hand, and on the other hand, the structure is complex, the manufacturing cost is high, and the adjustment is inconvenient. It is necessary to bend down and reach under the table to operate the adjustment components of the footrest. Summary of the Utility Model

[0004] The purpose of the present utility model is to address the above problems existing in the prior art, and propose a lifting platform with a simple structure, low manufacturing cost, and capable of achieving stepless adjustment.

[0005] The purpose of the present utility model can be achieved by the following technical solutions: A lifting platform, comprising:

[0006] A top frame and a bottom frame arranged vertically, and the top frame and the bottom frame are connected by a scissor structure. Among them, the first side of the scissor structure is rotatably connected to the top frame and the bottom frame, and the second side of the scissor structure is slidably matched with the top frame and the bottom frame. By the relative sliding between the scissor structure and the top frame and the bottom frame, the relative distance between the top frame and the bottom frame is adjusted;

[0007] An adjustable assembly, comprising:

[0008] A friction rod, one end of which is connected to the second side of the scissor structure;

[0009] A friction structure, which is movably matched with the friction rod. The friction structure has an unlocking position where it can slide relative to the friction rod and a locking position where it cannot move relative to the friction rod. When the friction structure is in the unlocking position, the second side of the scissor structure can slide relative to the top frame and the bottom frame;

[0010] A trigger member, one end of which is used as a trigger end, and the other end is connected to or abuts against the friction structure. Among them, by pressing the trigger end, the position of the friction structure can be changed to the unlocking position.

[0011] In the above-mentioned lifting platform, the friction structure includes a first friction plate and a second friction plate. One ends of the first friction plate and the second friction plate are both rotatably connected to the top frame. Jacks are provided at the other ends of the first friction plate and the second friction plate, and the jacks are in plug-in fit with the friction rods. Among them, when the trigger end is pressed, the first friction plate and the second friction plate can rotate relative to each other to the unlocking position, releasing the clamping between the friction rod and the inner wall of the jack.

[0012] In the above-mentioned lifting platform, a first elastic member is further included. The first elastic member is sleeved on the friction rod. The two ends of the first elastic member are respectively connected to the first friction plate and the second friction plate. The elastic force of the first elastic member is used to drive the first friction plate and the second friction plate to tilt relative to the friction rod to the locking position; or,

[0013] The lifting platform includes two first elastic members. The first ends of the first elastic members are connected to the top frame. The second end of one first elastic member is connected to the first friction plate, and the second end of the other first elastic member is connected to the second friction plate. The elastic force of the first elastic member is used to drive the first friction plate and the second friction plate to tilt relative to the friction rod to the locking position.

[0014] In the above-mentioned lifting platform, two supporting feet are provided on the trigger member, and a first contact surface and a second contact surface are respectively provided on the two supporting feet. Among them, when the trigger end is pressed, the first contact surface and the second contact surface respectively abut against the first friction plate and the second friction plate, causing the first friction plate and the second friction plate to rotate relative to each other, synchronously releasing the locking between the first friction plate, the second friction plate and the friction rod.

[0015] In the above-mentioned lifting platform, a connecting plate is provided on the top frame, and a through groove for the friction structure to pass through is provided on the connecting plate. Lugs are provided at the edges of the through groove, and one end of the friction structure is rotatably connected to the lugs, and the other end of the friction structure is in plug-in fit with the friction rod.

[0016] In the above-mentioned lifting platform, the trigger member is movably connected to the connecting plate. Two supporting feet are provided on the trigger member, and the two supporting feet can be in snap-fit with the through groove. Among them, a first contact surface and a second contact surface are respectively provided on the opposite sides of the two supporting feet.

[0017] In the above-mentioned lifting platform, barbs are provided on the opposite sides of the two supporting feet. When the friction structure is in the unlocking position, the barbs are used to limit the trigger member from disengaging from the connecting plate.

[0018] In the above-mentioned lifting platform, a guiding structure is provided between the connecting plate and the trigger member. The guiding structure includes a first guiding post or a guiding hole provided on the connecting plate, and a second guiding post provided on the trigger member. Among them, the first guiding post and the second guiding post, or the guiding hole and the second guiding post are in plug-in fit.

[0019] In the above-mentioned lifting platform, the scissor-type structure includes a first scissor-type arm and a second scissor-type arm connected by rotation, and the first scissor-type arm is provided with a first fixed block and a first sliding block at both ends, and the second scissor-type arm is provided with a second fixed block and a second sliding block at both ends, wherein the first fixed block and the second fixed block are respectively connected to the top frame and the bottom frame as the fixed side of the scissor-type structure, and the first sliding block and the second sliding block are respectively slidably matched with the top frame and the bottom frame as the movable side of the scissor-type structure, and the first fixed block and the first sliding block, and the second fixed block and the second sliding block are connected by a second elastic member.

[0020] In the above-mentioned lifting platform, it also includes a table top connected to the top frame, a clearance hole is provided in the middle of the table top, the trigger end of the trigger member passes through the clearance hole, and the trigger end of the trigger member is higher than the plane where the upper surface of the table top is located.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model provides a lifting platform which can realize stepless adjustment of products, and has a simple adjustment structure, low cost and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a lifting platform of the utility model.

[0024] Figure 2 It is a partial exploded view of an embodiment of a lifting platform of the utility model.

[0025] Figure 3 It is a structural schematic diagram of another viewing angle of an embodiment of a lifting platform of the utility model.

[0026] Figure 4 It is a partial structural schematic diagram of an embodiment of a lifting platform of the utility model.

[0027] Figure 5 It is a structural schematic diagram of a trigger member in a preferred embodiment of the utility model.

[0028] In the figure, 10, top frame; 11, connecting plate; 111, through slot; 112, lug; 113, first guide column;

[0029] 20. Bottom frame;

[0030] 30. Scissor-type structure; 31. Scissor-type hinge; 32. First scissor-type arm; 33. Second scissor-type arm; 34. First fixed block; 35. First sliding block; 36. Second fixed block; 37. Second sliding block; 38. Second elastic member;

[0031] 40. Adjustable component; 41. Friction rod; 42. Friction structure; 421. First friction plate; 422. Second friction plate; 423. Jack; 424. Rotating shaft; 43. Trigger member; 431. Trigger end; 432. Leg; 433. First contact surface; 434. Second contact surface; 435. Barbs; 436. Second guide post; 44. First elastic member

[0032] 50. Tabletop; 51. Relief hole Detailed implementation mode

[0033] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly

[0035] Although the original intention of the research and development of the present invention is to provide a new footrest, this should not be an adverse limitation to the present invention. For the convenience of description, the structure of the present invention will be described below starting from the embodiment of the lifting platform including the inventive concept of the present invention

[0036] As Figures 1 to 5 shown, a lifting platform provided by the present invention includes

[0037] A top frame 10 and a bottom frame 20 arranged vertically, and the top frame 10 and the bottom frame 20 are connected by a scissor structure 30. Among them, the first side of the scissor structure 30 is rotatably connected to the top frame 10 and the bottom frame 20, and the second side of the scissor structure 30 is slidably matched with the top frame 10 and the bottom frame 20. By the relative sliding between the scissor structure 30 and the top frame 10 and the bottom frame 20, the relative distance between the top frame 10 and the bottom frame 20 is adjusted

[0038] An adjustable component 40, including

[0039] A friction rod 41, one end of which is connected to the second side of the scissor structure 30

[0040] A friction structure 42, which is movably matched with the friction rod 41. The friction structure 42 has an unlocking position where it can slide relative to the friction rod 41 and a locking position where it cannot move relative to the friction rod 41. When the friction structure 42 is in the unlocking position, the second side of the scissor structure 30 can slide relative to the top frame 10 and the bottom frame 20

[0041] The trigger 43 has one end as the trigger end 431 and the other end is connected to or abuts against the friction structure 42. Among them, by pressing the trigger end 431, the position of the friction structure 42 can be changed to the unlocking position.

[0042] It is worth mentioning that in this embodiment, when the product is in the unlocked state, the change in the relative position between the top frame 10 and the bottom frame 20 directly comes from the sliding fit between the scissor structure 30 and the top frame 10 and the bottom frame 20, so as to achieve stepless speed regulation of the product in the lifting direction. In the prior art, as in the comparative document, it is through the engagement of the lock catch and the lock teeth on the lock bar and then transitions to the sliding fit between the scissor structure 30 and the top frame 10 and the bottom frame 20. And according to common knowledge, the lock catch and the lock teeth are in meshing transmission, and when the lock catch and the lock teeth are engaged, they are engaged one by one, and stepless adjustment cannot be formed, which also causes the product in the comparative document to be unable to achieve stepless adjustment.

[0043] A lifting platform provided by the utility model can achieve stepless adjustment of the product, and the adjustment structure is simple, the cost is low, and the operation is convenient.

[0044] Preferably, the friction structure 42 includes a first friction plate 421 and a second friction plate 422, and one ends of the first friction plate 421 and the second friction plate 422 are both rotatably connected to the top frame 10. The other ends of the first friction plate 421 and the second friction plate 422 are both provided with insertion holes 423, and the insertion holes 423 are in plug-in fit with the friction rod 41, that is, the friction rod 41 passes through the insertion holes 423 on the two friction plates, and the insertion holes 423 are slightly larger than the cross-section of the friction rod 41. Among them, when the trigger end 431 is pressed, the first friction plate 421 and the second friction plate 422 can rotate relative to each other to the unlocking position, and the engagement between the friction rod 41 and the hole wall of the insertion hole 423 is released.

[0045] According to the above, the friction structure 42 in this embodiment forms two forms through the relative rotation between the first friction plate 421 and the second friction plate 422. One is the unlocking form, and the other is the locking form. Among them, when the friction structure 42 is in the unlocked state, the hole walls of the insertion holes 423 on the first friction plate 421 and the second friction plate 422 do not form an engagement with the friction rod 41. At this time, the first friction plate 421 and the second friction plate 422 are relatively parallel or close to being relatively parallel, and the first friction plate 421, the second friction plate 422 and the friction rod 41 form a similar "H" structure; when the friction structure 42 is in the locked state, the first friction plate 421 and the second friction plate 422 are inclined relative to the axis of the friction rod 41, and the hole walls of the insertion holes 423 on the first friction plate 421 and the second friction plate 422 form an engagement with the friction rod 41. At this time, the first friction plate 421 and the second friction plate 422 are in a horn form, and the first friction plate 421, the second friction plate 422 and the friction rod 41 form a similar triangular structure, so as to improve the engagement effect.

[0046] It is worth mentioning that by changing the relative positions of the first friction plate 421 and the second friction plate 422 with respect to the friction rod 41, the locking and unlocking of the friction structure 42 are realized. The switching between the unlocked and locked states of the friction structure 42 is achieved by pressing the trigger 43. That is, when the trigger 43 is pressed, the friction structure 42 is in the unlocked state, and when the trigger 43 is released, the friction structure 42 is in the locked state. The operation is convenient and reliable, and it is convenient to adjust the relative distance between the top frame 10 and the bottom frame 20.

[0047] Preferably, the adjustable component 40 further includes a first elastic member 44. The first elastic member 44 is sleeved on the friction rod 41 and is located between the two friction plates. Wherein, both ends of the first elastic member 44 are respectively connected to the first friction plate 421 and the second friction plate 422, and the elastic force of the first elastic member 44 is used to drive the first friction plate 421 and the second friction plate 422 to tilt relative to the friction rod 41 to the locking position.

[0048] In this embodiment, the first elastic member 44 is sleeved on the friction rod 41, and both ends of the first elastic member 44 are respectively connected to the first friction plate 421 and the second friction plate 422. Wherein, when the trigger 43 is pressed, the first friction plate 421 and the second friction plate 422 rotate relative to each other, so that the first elastic member 44 is in a compressed state. When the trigger 43 is released, the first elastic member 44 expands and pushes the first friction plate 421 and the second friction plate 422 to the locking position respectively. At this time, the axis of the jack 423 on the friction plate forms a certain angle with the axis of the friction rod 41, and the upper and lower edges of the jack 423 contact the friction rod 41, completing the clamping between the first friction plate 421, the second friction plate 422 and the friction rod 41. The setting of the first elastic member 44 can ensure reliable clamping between the first friction plate 421, the second friction plate 422 and the friction rod 41 during reset, improving the reliability of product use.

[0049] In the lifting platform of another embodiment, two first elastic members 44 are included. The first ends of the two first elastic members 44 are both connected to the top frame 10. The second end of one first elastic member 44 is connected to the first friction plate 421, and the second end of the other first elastic member 44 is connected to the second friction plate 422. The elastic force of the first elastic member 44 is used to drive the first friction plate 421 and the second friction plate 422 to tilt relative to the friction rod 41 to the locking position.

[0050] Specifically, the top frame 10 can extend downward two parallel mounting plates. The two mounting plates are respectively arranged on the opposite sides of the two friction plates. The two first elastic members 44 are both sleeved on the friction rod 41 and are respectively arranged between the first friction plate 421 and the corresponding mounting plate, and between the second friction plate 422 and the opposite mounting plate.

[0051] Preferably, two feet 432 are provided on the trigger 43, and a first contact surface 433 and a second contact surface 434 are respectively provided on the two feet 432. When the trigger end 431 is pressed, the first contact surface 433 and the second contact surface 434 respectively abut against the first friction plate 421 and the second friction plate 422, so that the first friction plate 421 and the second friction plate 422 rotate relative to the friction rod 41, and the locking between the first friction plate 421, the second friction plate 422 and the friction rod 41 is synchronously released.

[0052] It is further pointed out that when the friction structure 42 is in the locked state, the first contact surface 433 and the second contact surface 434 are respectively not in contact with the first friction plate 421 and the second friction plate 422; when the trigger 43 is pressed, the first contact surface 433 and the second contact surface 434 are respectively in contact with the first friction plate 421 and the second friction plate 422, and the first friction plate 421 and the second friction plate 422 are squeezed, so that the first friction plate 421 and the second friction plate 422 rotate relative to each other, realizing the unlocking of the friction structure 42; or when the friction structure 42 is in the locked state, the first contact surface 433 and the second contact surface 434 are respectively in contact with the first friction plate 421 and the second friction plate 422, but no extrusion occurs between the corresponding two; when the trigger 43 is pressed, the first contact surface 433 and the second contact surface 434 respectively squeeze the first friction plate 421 and the second friction plate 422, prompting the first friction plate 421 and the second friction plate 422 to rotate relative to each other, realizing the unlocking of the friction structure 42.

[0053] In this embodiment, the rotation of the first friction plate 421 and the second friction plate 422 is realized by the first contact surface 433 and the second contact surface 434 respectively squeezing the end faces of the first friction plate 421 and the second friction plate 422 away from the rotating shaft, so that the first friction plate 421 and the second friction plate 422 can rotate relative to each other.

[0054] It is worth mentioning that the first contact surface 433 and the second contact surface 434 in this embodiment can also be arranged on the opposite sides of the two feet 432. At this time, when the trigger 43 is pressed, the first contact surface 433 and the second contact surface 434 respectively slide relative to and squeeze the first friction plate 421 and the second friction plate 422, thereby prompting the relative rotation of the first friction plate 421 and the second friction plate 422, and further realizing the unlocking of the friction structure 42.

[0055] Preferably, a connecting plate 11 is provided on the top frame 10, and a through groove 111 for the friction structure 42 to pass through is provided on the connecting plate 11. Lugs 112 are provided on the edge of the through groove 111, and one end of the friction structure 42 is rotatably connected to the lug 112, and the other end of the friction structure 42 is inserted and matched with the friction rod 41.

[0056] It is further pointed out that the first friction plate 421 and the second friction plate 422 are rotatably connected to the lug 112 through the rotating shaft 424.

[0057] It is further pointed out that the trigger member 43 is movably connected to the connecting plate 11. Two supporting feet 432 are provided on the trigger member 43, and the two supporting feet 432 can be snap-fitted with the through groove 111. Wherein, barbs 435 are provided on the opposite sides of the two supporting feet 432. When the friction structure 42 is in the unlocked position, the barbs 435 are used to limit the trigger member 43 from disengaging from the connecting plate 11.

[0058] It is further pointed out that a guiding structure is provided between the connecting plate 11 and the trigger member 43. The guiding structure includes a first guiding column 113 or a guiding hole provided on the connecting plate 11, and a second guiding column 436 provided on the trigger member 43. Wherein, the first guiding column 113 and the second guiding column 436, or the guiding hole and the second guiding column 436 are inserted and matched.

[0059] In this embodiment, by providing the guiding structure, the straightness of the trigger member 43 during the movement is ensured, so that the barbs 435 can be reliably snap-fitted on the edge of the through groove 111 during the reset process of the trigger member 43.

[0060] Preferably, the scissor structure 30 includes a first scissor arm 32 and a second scissor arm 33 rotatably connected through a scissor hinge 31. The two ends of the first scissor arm 32 are respectively provided with a first fixing block 34 and a first sliding block 35, and the two ends of the second scissor arm 33 are respectively provided with a second fixing block 36 and a second sliding block 37. Wherein, the first fixing block 34 and the second fixing block 36 are respectively connected to the top frame 10 and the bottom frame 20. The first scissor arm 32 and the second scissor arm 33 are respectively rotatably connected to the first fixing block 34 and the second fixing block 36, serving as the fixed side of the scissor structure 30. The first sliding block 35 and the second sliding block 37 are respectively slidably matched with the top frame 10 and the bottom frame 20. The first scissor arm 32 and the second scissor arm 33 are respectively rotatably connected to the first sliding block 35 and the second sliding block 37, serving as the movable side of the scissor structure 30. And a second elastic member 38 is connected between the first fixing block 34 and the first sliding block 35, and between the second fixing block 36 and the second sliding block 37.

[0061] Preferably, it further includes a tabletop 50 connected to the top frame 10. A relief hole 51 is provided in the middle of the tabletop 50. The triggering end 431 of the trigger member 43 passes through the relief hole 51, and the triggering end 431 of the trigger member 43 is higher than the plane of the upper surface of the tabletop 50. When an external force presses the trigger member 43, the trigger member 43 moves downward, and the support leg 432 presses the friction plate. The axes of the jacks 423 on the two friction plates gradually coincide with the axis of the friction rod 41. Since the size of the jack on the friction plate is slightly larger than the cross-sectional size of the friction rod 41, the friction rod 41 can freely pass through the jacks 423 of the two friction plates. At this time, the lifting platform is in an unlocked state. When the tabletop 50 is pressed down or lifted up, the top frame 10 can be lifted or lowered.

[0062] When the external force pressing the trigger member 43 disappears, the first elastic member 44 abuts against the friction plate, and the friction plate reversely presses the support leg 432 of the trigger member 43, pushing the trigger member 43 to move upward until the barb 435 on the support leg 432 hooks the edge of the through groove 111, thereby ensuring that the trigger member 43 does not disengage from the connecting plate 11. At this time, when the tabletop 50 is pressed down, the friction rod 41 will generate a frictional force on the first friction plate 421, causing the first friction plate 421 to rotate in the clockwise direction, thereby increasing the pressure between the first friction plate 421 and the friction rod 41. The pressure direction and the frictional force direction between the first friction plate 421 and the friction rod 41 reach the friction dead angle, thereby increasing the frictional force to lock the mechanism, and the tabletop 50 cannot be pressed down; when the tabletop 50 is lifted up, the friction rod 41 will generate a frictional force on the second friction plate 422, causing the second friction plate 422 to rotate in the counterclockwise direction, thereby increasing the pressure between the second friction plate 422 and the friction rod 41. The pressure direction and the frictional force direction between the second friction plate 422 and the friction rod 41 reach the friction dead angle, thereby increasing the frictional force to lock the mechanism, and the tabletop 50 cannot be lifted up. At this time, the lifting platform is in a locked state.

[0063] Based on the above embodiments, the lifting platform of this embodiment is applicable to a footrest. The tabletop 50 serves as a footrest platform or a tabletop for placing the calves, and the second elastic member 38 is a spring in a stretched state. When it is necessary to operate the lifting of the footrest, one foot can step on the triggering end 431 to unlock, and the other foot or leg steps on the tabletop 50 to lower the tabletop 50, or one foot gently steps on the triggering end 431 to unlock without applying an external force to the tabletop. At this time, under the action of the second elastic member 38, the tabletop 50 is raised; when the tabletop 50 is raised or lowered to the desired height, the trigger member 43 is released, and the tabletop 50 is locked at the current height.

[0064] In this embodiment, the tabletop 50 serves as the bearing plane of the lifting platform, and the triggering end 431 of the triggering member 43 is higher than the plane where the upper surface of the tabletop 50 is located. When the user's foot is placed on the tabletop 50, it is convenient for the foot to touch the triggering end 431 on the triggering member 43, without the user having to bend down and reach under the table to operate the lifting of the lifting platform, making the use of the product more convenient.

[0065] It should be noted that in the present utility model, descriptions such as "first", "second", and "one" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0066] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0067] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A lifting platform, characterized in that: include: A top frame (10) and a bottom frame (20) are arranged in an upper and lower distribution, and the top frame (10) and the bottom frame (20) are connected via a scissor-type structure (30), wherein a first side of the scissor-type structure (30) is rotatably connected to the top frame (10) and the bottom frame (20), and a second side of the scissor-type structure (30) is slidably matched with the top frame (10) and the bottom frame (20), and the relative distance between the top frame (10) and the bottom frame (20) is adjusted by relative sliding between the scissor-type structure (30) and the top frame (10) and the bottom frame (20); The adjustable component (40) comprises: A friction rod (41), one end of which is connected to the second side of the scissor-type structure (30); a friction structure (42) movably matched with the friction rod (41), the friction structure (42) having an unlocking position at which the friction rod (41) can slide relative to the friction rod (41) and a locking position at which the friction rod (41) cannot move relative to the friction rod (41), and when the friction structure (42) is in the unlocking position, the second side of the scissor-type structure (30) can slide relative to the top frame (10) and the bottom frame (20); A trigger member (43) has one end serving as a trigger end (431) and the other end connected to or in contact with the friction structure (42), wherein the position of the friction structure (42) can be changed to an unlocking position by pressing the trigger end (431).

2. A lifting platform according to claim 1, characterized in that: The friction structure (42) comprises a first friction plate (421) and a second friction plate (422), and one end of the first friction plate (421) and the second friction plate (422) are both rotatably connected to the top frame (10), and the other ends of the first friction plate (421) and the second friction plate (422) are both provided with a plug hole (423), and the plug hole (423) is plugged into and matched with the friction rod (41), wherein when the trigger end (431) is pressed, the first friction plate (421) and the second friction plate (422) can be relatively rotated to the unlocking position, thereby releasing the clamping connection between the friction rod (41) and the hole wall of the plug hole (423).

3. A lifting platform according to claim 2, characterized in that: It also includes a first elastic member (44), the first elastic member (44) is sleeved on the friction rod (41), wherein the two ends of the first elastic member (44) are respectively connected to the first friction plate (421) and the second friction plate (422), and the elastic force of the first elastic member (44) is used to drive the first friction plate (421) and the second friction plate (422) to tilt relative to the friction rod (41) to the locking position; or, The lifting platform comprises two first elastic members (44), wherein the first ends of the first elastic members (44) are connected to the top frame (10), wherein the second end of one of the first elastic members (44) is connected to the first friction plate (421), and the second end of the other first elastic member (44) is connected to the second friction plate (422), and the elastic force of the first elastic member (44) is used to drive the first friction plate (421) and the second friction plate (422) to tilt relative to the friction rod (41) to the locking position.

4. A lifting platform according to claim 2, characterized in that: The trigger member (43) is provided with two legs (432), and the two legs (432) are respectively provided with a first contact surface (433) and a second contact surface (434), wherein when the trigger end (431) is pressed, the first contact surface (433) and the second contact surface (434) respectively contact with the first friction plate (421) and the second friction plate (422), so that the first friction plate (421) and the second friction plate (422) rotate relative to each other, and the lock between the first friction plate (421), the second friction plate (422) and the friction rod (41) is synchronously released.

5. A lifting platform according to claim 4, characterized in that: A connecting plate (11) is provided on the top frame (10), and a through slot (111) is provided on the connecting plate (11) for the friction structure (42) to pass through, a lug (112) is provided on the edge of the through slot (111), and one end of the friction structure (42) is rotatably connected to the lug (112), and the other end of the friction structure (42) is plug-fitted to the friction rod (41).

6. A lifting platform according to claim 5, characterized in that: The trigger member (43) is movably connected to the connecting plate (11), and two supporting legs (432) are provided on the trigger member (43), and the two supporting legs (432) can be engaged with the through groove (111), wherein the first contact surface (433) and the second contact surface (434) are respectively provided on opposite sides of the two supporting legs (432).

7. A lifting platform according to claim 6, characterized in that: Barbs (435) are provided on opposite sides of the two legs (432); when the friction structure (42) is in the unlocked position, the barbs (435) are used to limit the trigger member (43) from being separated from the connecting plate (11).

8. A lifting platform according to claim 7, characterized in that: A guide structure is provided between the connecting plate (11) and the trigger member (43), and the guide structure comprises a first guide column (113) or a guide hole provided on the connecting plate (11), and a second guide column (436) provided on the trigger member (43), wherein the first guide column (113) and the second guide column (436), or the guide hole and the second guide column (436) are plug-fitted.

9. A lifting platform according to any one of claims 1 to 8, characterized in that: The scissor-type structure (30) comprises a first scissor-type arm (32) and a second scissor-type arm (33) connected by rotation, and the two ends of the first scissor-type arm (32) are respectively provided with a first fixed block (34) and a first sliding block (35), and the two ends of the second scissor-type arm (33) are respectively provided with a second fixed block (36) and a second sliding block (37), wherein the first fixed block (34) and the second fixed block (36) are respectively connected to the top frame (10) and the bottom frame (20) as the fixed side of the scissor-type structure (30), and the first sliding block (35) and the second sliding block (37) are respectively slidably matched with the top frame (10) and the bottom frame (20) as the movable side of the scissor-type structure (30), and the first fixed block (34) and the first sliding block (35) and the second fixed block (36) and the second sliding block (37) are connected by a second elastic member (38).

10. A lifting platform according to any one of claims 1 to 8, characterized in that: It also comprises a table top (50) connected to the top frame (10), a clearance hole (51) being provided in the middle of the table top, a trigger end (431) of the trigger member (43) passing through the clearance hole (51), and the trigger end (431) of the trigger member (43) being higher than the plane where the upper surface of the table top (50) is located.

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