Lifting mechanism of lifting table board

Abstract

The utility model discloses a lifting mechanism of a lifting table board, the lifting mechanism is suitable for the lifting table board with a fixed seat assembly and a table board assembly, the lifting mechanism comprises a fixed support, a coil spring piece and a rope piece, the coil spring piece is wound at the bottom of the fixed support, one end of the rope piece is connected with the coil spring piece to bypass the top of the fixed support, and the rope piece is connected with the fixed support. The other end of the lifting table plate is connected with the table plate assembly, the side portion of the table plate assembly is movably connected with the fixing support, and the lifting table plate comprises a folded state and an unfolded state; when the lifting table plate is in the retracting state, the unfolding length of the coil spring piece is consistent with the moving stroke of the table plate assembly relative to the fixed support, and when the lifting table plate is converted from the retracting state to the unfolding state, the unfolded coil spring piece retracts to drive the rope piece to pull the table plate assembly to complete the moving stroke.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and more specifically to a lifting mechanism for a lifting table. Background Technology

[0002] In today's world of increasingly sophisticated transportation and in-vehicle lifestyles, functional accessories inside vehicles such as automobiles are receiving more and more attention. As a key component for enhancing in-vehicle convenience, the lift-up table has broad application prospects in various cars, RVs, and even some special-purpose vehicles, providing numerous conveniences for drivers and passengers.

[0003] However, existing lift-up tables used in vehicles such as automobiles have significant design limitations, particularly in the lifting function of the table assembly. Traditional lift-up tables used in such vehicles often employ relatively simple and basic mechanical structures to achieve the lifting action of the tray. Common methods include using direct linkages with simple spring assistance, lifting the table assembly through spring thrust. Therefore, due to the structural layout constrained by the limited space inside the vehicle, the available power sources, and the less-than-ideal force transmission path, the extension stroke of the table assembly is greatly limited. Generally, it can only achieve a movement stroke of about 150 mm. Due to insufficient subsequent stroke, it cannot be lifted smoothly to a more ideal height position, and the user has to manually lift the table assembly to make up for the remaining height difference.

[0004] In conclusion, how to effectively increase the extension stroke of the table assembly under the limited space of vehicles such as automobiles, so as to achieve convenient operation without the need for manual lifting by the user, and make the lifting table more stable and efficient during vehicle lifting, has become a key technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this application is to provide a lifting mechanism for a lifting table to solve the problem of short extension stroke of the lifting table in related technologies.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A lifting mechanism for a height-adjustable table is provided. This lifting mechanism is applicable to a height-adjustable table with a fixed base assembly and a table assembly. The lifting mechanism includes a fixed bracket, a coil spring, and a rope. The coil spring is wound around the bottom of the fixed bracket, and one end of the rope is connected to the coil spring to pass over the top of the fixed bracket, while the other end is connected to the table assembly. The side of the table assembly is movably connected to the fixed bracket. The height-adjustable table includes a retracted state and an extended state. When the height-adjustable table is in the retracted state, the extended length of the coil spring is consistent with the travel distance of the table assembly relative to the fixed bracket. When the height-adjustable table changes from the retracted state to the extended state, the extended coil spring retracts to drive the rope to pull the table assembly to complete the travel distance.

[0007] As a preferred embodiment, when the lifting table is in the retracted state, the unfolded portion of the coil spring is located on one side of the fixed bracket.

[0008] As another preferred embodiment, a slot is provided between the bottom and the top of the fixing bracket, the slot extending from the bottom to the top of the fixing bracket, the slot for accommodating the unfolded portion of the coil spring.

[0009] More preferably, the coil spring is wound around the bottom of the fixed bracket via a gear assembly, the gear assembly including: a coil spring shaft and a damping gear, the coil spring shaft being fixedly connected to the coil spring, the coil spring shaft meshing with the damping gear, and the extension and retraction of the coil spring driving the rotation of the coil spring shaft and the damping gear.

[0010] Preferably, the lifting mechanism further includes a lifting platform, which is rotatably connected to the table assembly. The fixed base assembly is provided with two opposing slide rails along the moving direction of the table assembly, thereby the lifting platform is slidably connected to the slide rails.

[0011] Preferably, when the lifting table changes from the retracted state to the unfolded state, the lifting platform moves along the slide rail from the bottom to the top of the fixed bracket, and when the lifting platform reaches the top of the fixed bracket, the lifting platform self-locks relative to the slide rail.

[0012] Further preferably, the table assembly includes: a tray body and a platform body, the tray body and the platform body being rotatably connected, and the lifting platform including: a locking spindle and a linkage assembly, the locking spindle being disposed through the platform body, the linkage assembly being connected to the lifting platform, and a groove being provided on the slide rail near the top position of the fixed bracket; wherein, when the table assembly moves to the top of the fixed bracket, the locking spindle drives the linkage assembly to engage in the groove, thereby completing the fixation of the lifting platform relative to the slide rail.

[0013] Further preferably, the linkage component includes: a first locking side shaft and a second locking side shaft, the first locking side shaft and the second locking side shaft being movably connected to the lifting platform, the first locking side shaft and the second locking side shaft being arranged opposite to each other, and the slide rails on both sides of the opposite arrangement being provided with the grooves corresponding to the first locking side shaft and the second locking side shaft; wherein, the end of the locking main shaft is located close to the first locking side shaft and the second locking side shaft, the end of the locking main shaft, the first locking side shaft, and the second locking side shaft are all arranged with wedge-shaped inclined surfaces, and then the locking main shaft is pressed down to squeeze and interfere with the first locking side shaft and the second locking side shaft through the wedge-shaped inclined surfaces, so that the first locking side shaft and the second locking side shaft move away from each other to be embedded in the corresponding grooves for fixation.

[0014] Preferably, a first recess of a first depth and a second recess of a second depth are formed on two adjacent surfaces of the tray body. The first recess and the second recess are smoothly transitioned. By rotating the tray body relative to the platform body, the locking spindle can move between the first recess and the second recess. The first depth is less than the second depth. When the locking spindle moves from the second recess to the first recess, the end of the locking spindle near the linkage component extends to drive the linkage component to engage with the groove.

[0015] Preferably, the locking spindle is fitted with an elastic element. When the locking spindle moves from the first recess into the second recess, the elastic element can drive the locking spindle to reset and spring back, so that the locking spindle separates from the first locking side shaft and the second locking side shaft, and the first locking side shaft and the second locking side shaft move closer to each other to release the self-locking.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] The coil spring possesses excellent elastic energy storage characteristics. When the lifting table is in the retracted state, the coil spring is in an extended, energy-storing state, storing a significant amount of elastic potential energy. As the lifting table transitions to the extended state, the coil spring begins to retract. Since one end of the rope is connected to it, the coiling force of the coil spring is transmitted to the table assembly through the rope. Unlike the traditional method where a spring pops out to move the table assembly, the rope in this application, acting as a flexible connector, can change the direction of the force, efficiently converting the vertical coiling force of the coil spring into a pulling force that causes the table assembly to rise along the fixed support, avoiding force dispersion and loss. Furthermore, the rope can be flexibly arranged according to the lifting path of the table assembly, without being overly restricted by the shape of the fixed support structure. This allows the force generated by the resetting of the coil spring to act on the table assembly along an optimized path, thus smoothly and powerfully pulling the table assembly and easily overcoming the original travel limitations. Attached Figure Description

[0018] Figure 1 A schematic diagram of the retracted lifting table.

[0019] Figure 2 This is a structural diagram of the lifting mechanism and table assembly in the retracted state.

[0020] Figure 3 This is a side view of the lifting mechanism and table assembly in the retracted state.

[0021] Figure 4 A schematic diagram of the top position of the lifting mechanism in the retracted state;

[0022] Figure 5 A schematic diagram of the structure near the bottom of the gear assembly in the lifting mechanism when it is in the retracted state;

[0023] Figure 6 This is a schematic diagram of the gear assembly.

[0024] Figure 7 This is a partial structural diagram of the lifting table in its unfolded state.

[0025] Figure 8 This is a partial structural diagram of the lifting platform location;

[0026] Figure 9 This is a partial structural sectional view of the lifting platform location;

[0027] Figure 10 A schematic diagram of the structure for locking the spindle against the tray body;

[0028] Figure 11 This is a schematic diagram of the locking mechanism in the lifting table.

[0029] In the diagram: 1. Lifting table; 10. Fixed base assembly; 20. Lifting mechanism; 30. Fixed bracket; 31. Slot; 32. Slide rail; 33. Groove; 40. Table assembly; 41. Tray body; 411. First recess; 412. Second recess; 42. Lifting platform; 421. Platform body; 422. Locking spindle; 423. First locking side shaft; 424. Second locking side shaft; 50. Spring component; 60. Rope component; 70. Gear assembly; 71. Spring shaft; 72. Damping gear; h1. First depth; h2. Second depth; 80. Elastic component; 81. Table; 82. Table base; 83. Button; 84. Button connecting rod; 85. Unlocking spring; 86. Hook; 87. Hook. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0034] In a preferred embodiment, see Figures 1 to 11This application provides a lifting mechanism 20 for a height-adjustable tabletop 1. The lifting mechanism 20 is suitable for the height-adjustable tabletop 1, which includes a fixed base assembly 10, a tabletop assembly 40, and the lifting mechanism 20. The lifting mechanism 20 is fixedly connected to the fixed base assembly 10 and is placed inside the fixed base assembly 10. The lifting mechanism 20 includes a fixed bracket 30, a coil spring 50, and a rope 60. The coil spring 50 is wound around the bottom of the fixed bracket 30, and one end of the rope 60 is connected to the coil spring 50 to bypass the fixed bracket 30. The top of the table 1 is connected to the table assembly 40 at the other end. The side of the table assembly 40 is movably connected to the fixed bracket 30. The lifting table 1 includes a retracted state and an extended state. When the lifting table 1 is in the retracted state, the extended length of the coil spring 50 is consistent with the travel distance of the table assembly 40 relative to the fixed bracket 30. When the lifting table 1 changes from the retracted state to the extended state, the extended coil spring 50 retracts to drive the rope 60 to pull the table assembly 40 to complete the travel distance.

[0035] In traditional similar product designs, the extension stroke of the table assembly 40 is generally short, limited to only 150 mm due to structural and power limitations. Furthermore, because of this short stroke, users must manually lift the tray after the table assembly 40 extends, which is not only physically demanding but also extremely inconvenient. This application ingeniously employs an innovative design that utilizes the coordinated operation of the rope component 60 and the coil spring component 50. It fully leverages the unique coiling characteristics of the coil spring component 50, converting its elastic potential energy into the traction force of the rope component 60, thereby smoothly and powerfully pulling the table assembly 40. This easily overcomes the original stroke limitation, achieving a stroke of up to 300 mm, eliminating the need for manual lifting, completely freeing the user's hands, greatly improving the extension convenience and stroke length of the table assembly 40, fully meeting the needs of diverse usage scenarios, and achieving a fusion of practicality and convenience.

[0036] It should also be noted that, see Figures 3 to 5The coil spring 50 possesses excellent elastic energy storage characteristics. When the lifting table 1 is in the retracted state, the coil spring 50 is in an extended, energy-storing state, storing a large amount of elastic potential energy. When the lifting table 1 transitions to the extended state, the coil spring 50 begins to retract. Since one end of the rope 60 is connected to it, the coiling force of the coil spring 50 is transmitted to the table assembly 40 through the rope 60. Unlike the traditional method where a spring pops out to push the table assembly 40 to move, in this application, the rope 60, as a flexible connector, can change the direction of the force, efficiently converting the vertical coiling force of the coil spring 50 into a pulling force that causes the table assembly 40 to rise along the fixed bracket 30, thus avoiding force dispersion and loss. Moreover, the rope component 60 can be flexibly arranged according to the lifting path of the table assembly 40, without being overly restricted by the structural shape of the fixed bracket 30. This allows the force generated by the reset of the coil spring component 50 to act on the table assembly 40 along the optimal path, thereby pulling the table assembly 40 smoothly and powerfully, and thus easily breaking through the original stroke limit.

[0037] As a preferred option, see Figure 4 When the lifting table 1 is in the retracted state, the extended part of the coil spring 50 is located on one side of the fixed bracket 30, without having to go around the fixed pulley set on the top of the fixed bracket 30. Thus, the coil spring 50 set on one side can reduce the kinetic energy loss when the extended part of the coil spring is retracted.

[0038] Specifically, the continuous friction between the extended portion of the coil spring 50 and the fixed pulley consumes a significant amount of kinetic energy, greatly reducing the original elastic potential energy of the coil spring 50 during the retraction process and preventing it from being efficiently converted into effective power to pull the table assembly 40. Furthermore, frequent friction accelerates component wear and shortens the overall lifespan of the device. This application cleverly avoids frictional losses between the fixed pulley and the coil spring 50 by placing the coil spring 50 on one side next to the fixed bracket 30. This not only allows the extended portion of the coil spring 50 to convert elastic potential energy into lifting power for the table assembly 40 more efficiently during retraction, ensuring powerful lifting and lowering of the tray each time, but also significantly reduces wear between components, extending the device's durability. From the user's perspective, the lifting and lowering process of the table assembly 40 is smoother and more stable, without any jerking due to insufficient power, further ensuring the stability and reliability of the table assembly 40's lifting and lowering action.

[0039] As another preferred option, see Figure 2A slot 31 is provided between the bottom and top of the fixed bracket 30, extending from the bottom to the top, for the placement of the unfolded portion of the coil spring 50. During the operation of the lifting mechanism 20 of the lifting table 1, if the unfolded portion of the coil spring 50 lacks adequate space, it is highly susceptible to entanglement, collision, or other interference with surrounding components. Such problems not only hinder the normal winding and extension of the coil spring, preventing the table assembly 40 from lifting smoothly, but may also damage the coil spring or other related components due to hard friction between parts, causing a malfunction of the entire lifting mechanism 20 and severely affecting the product's performance and lifespan. This application specifically designs a slot 31 between the bottom and top of the fixed bracket 30. This slot 31 is a dedicated channel for the unfolded portion of the coil spring 50, precisely guiding its movement during extension and retraction, ensuring it always operates in an orderly and standardized manner. This effectively avoids the coil spring from getting tangled with surrounding components, ensuring that the coil spring can retract and extend smoothly without any obstruction. This guarantees the smooth operation of the entire lifting mechanism from the source, greatly reduces the probability of failure, provides users with a stable and reliable user experience, and reduces maintenance troubles and usage interruptions caused by equipment failure.

[0040] In a further preferred embodiment, the coil spring 50 is wound around the bottom of the fixed bracket 30 via a gear assembly 70. The gear assembly 70 includes a coil spring shaft 71 and a damping gear 72. The coil spring shaft 71 is fixedly connected to the coil spring 50, and the coil spring shaft 71 meshes with the damping gear 72. The extension and retraction of the coil spring 50 drives the rotation of the coil spring shaft 71 and the damping gear 72. The damping gear 72 provides a certain damping for the rotation of the coil spring shaft 71, preventing the coil spring 50 from retracting too quickly, so that the table assembly 40 rises slowly and uniformly.

[0041] Preferably, the lifting mechanism 20 further includes a lifting platform 42, which is rotatably connected to the table assembly 40. The fixed base assembly 10 has two opposing slide rails 32 along the moving direction of the table assembly 40, thereby allowing the lifting platform 42 to slide slidably connect to the slide rails 32. (For ease of structural description...) Figure 2 The side of the central lifting mechanism 20 is shown with a slide rail 32.

[0042] Preferred, see Figures 7 to 9 When the lifting table 1 changes from the retracted state to the unfolded state, the lifting platform 42 moves along the slide rail 32 from the bottom to the top of the fixed bracket 30, and when the lifting platform 42 reaches the top of the fixed bracket 30, the lifting platform 42 locks itself relative to the slide rail 32.

[0043] Further preferably, the table assembly 40 includes: a tray body 41 and a table body 421, the tray body 41 and the table body 421 being rotatably connected; the lifting platform 42 includes: a locking spindle 422 and a linkage assembly, the locking spindle 422 being disposed through the table body 421, the linkage assembly being connected to the lifting platform 42; and a groove 33 is provided on the slide rail 32 near the top of the fixed bracket 30; wherein, when the table assembly 40 moves to the top of the fixed bracket 30, the locking spindle 422 drives the linkage assembly to engage in the groove 33, thereby fixing the lifting platform 42 relative to the slide rail 32.

[0044] Further preferably, the linkage component includes: a first locking side shaft 423 and a second locking side shaft 424, which are movably connected to the lifting platform 42. The first locking side shaft 423 and the second locking side shaft 424 are arranged opposite to each other, and the two side slide rails 32 arranged opposite to each other are provided with grooves 33 corresponding to the first locking side shaft 423 and the second locking side shaft 424. The end of the locking main shaft 422 is located close to the first locking side shaft 423 and the second locking side shaft 424. The end of the locking main shaft 422, the first locking side shaft 423, and the second locking side shaft 424 are all arranged with wedge-shaped inclined surfaces. The locking main shaft 422 is pressed down to squeeze and interfere with the first locking side shaft 423 and the second locking side shaft 424 through the wedge-shaped inclined surfaces, so that the first locking side shaft 423 and the second locking side shaft 424 move away from each other to be embedded in the corresponding grooves 33 and fixed.

[0045] When the lifting platform 42 needs to self-lock, the locking spindle 422 only needs to undergo a slight displacement change. Its wedge-shaped inclined surface quickly converts this longitudinal displacement into a powerful lateral thrust, efficiently driving the first locking side shaft 423 and the second locking side shaft 424 to move rapidly to both sides. This design, utilizing the mechanical principle of inclined surfaces, greatly simplifies the operation process. It eliminates the need for complex multi-step operations or additional power assistance; the natural downward pressure of the locking spindle 422 alone is sufficient to complete the instantaneous self-locking action, achieving rapid and precise locking. Simultaneously, due to the mechanical advantages of the wedge-shaped inclined surface, the precision requirements for the construction of each component are relatively low. Compared to some high-precision locking structures, this effectively reduces processing difficulty and costs during manufacturing, improving production efficiency. It ensures efficient self-locking while balancing production costs and efficiency.

[0046] Preferred, see Figure 10The tray body 41 has a first recess 411 with a first depth h1 and a second recess 412 with a second depth h2 on two adjacent surfaces. The first recess 411 and the second recess 412 are smoothly transitioned. The tray body 41 is rotated relative to the table body 421 so that the locking spindle 422 can move between the first recess 411 and the second recess 412. The first depth h1 is less than the second depth h2. When the locking spindle 422 moves from the second recess 412 into the first recess 411, the end of the locking spindle 422 near the linkage component extends to drive the linkage component to engage in the groove 33.

[0047] When the locking spindle 422 transitions from the deeper second recess 412 to the shallower first recess 411, the end of the locking spindle 422 near the linkage component naturally elongates due to the change in recess depth. This precisely triggers the engaging action of the linkage component, allowing it to smoothly embed into the groove 33 on the slide rail 32, thus completing the self-locking of the lifting platform 42. Therefore, in specific operation, the difference between the first depth h1 and the second depth h2 is preferably only 4 mm. Thus, when the locking spindle 422 moves from the second recess 412 to the first recess 411, the locking spindle 422 only descends by 4 mm, which is sufficient to complete the wedge-shaped horizontal axial movement of the locking spindle 422 pushing the first locking side shaft 423 and the second locking side shaft 424.

[0048] Preferably, the locking spindle 422 is fitted with an elastic element 80. When the locking spindle 422 moves from the first recess 411 into the second recess 412, the elastic element 80 can drive the locking spindle 422 to reset and spring back, so that the locking spindle 422 separates from the first locking side shaft 423 and the second locking side shaft 424, and the first locking side shaft 423 and the second locking side shaft 424 move closer to each other to release the self-locking.

[0049] It should be noted that the elastic element 80 is a spring structure. With the setting of the elastic element 80, when it is necessary to return the lifting table 1 from the unfolded state to the retracted state, it is only necessary to rotate the tray body 41. The elastic element 80 drives the locking main shaft 422 to reset into the second recess 412. Due to the upward movement of the locking main shaft 422, the first locking side shaft 423 and the second locking side shaft 424 also move closer to each other under the rebound of the sleeved elastic element 80, thereby disengaging from the groove 33 and completing the unlocking. Therefore, the lifting table 1 in this application does not need to be lifted when resetting, which optimizes the product structure and reduces the complexity of operation.

[0050] In a complete operation process, the lifting table 1 in this application document is in its initial state, that is, it is presented as... Figure 1When the tabletop 81 is in its retracted state, to change it from the retracted state to the unfolded state, the user only needs to press the button 83 located on the fixed bracket 30. Pressing the button 83 will cause the button connecting rod 84 to move down, and then the button connecting rod 84 will touch the pressing hook 87. Since the hook 87 is rotatably connected to the fixed bracket 30, the hook 87 will rotate around the connection point, causing the hook 87 to separate from the hook tooth 86. The hook tooth 86 is fixed to the lifting platform 42. When the hook tooth 86 separates from the hook 87, the lifting platform 42 is no longer limited by the fixed limit of the hook 87. Therefore, as the coil spring 50 retracts and resets, the rope 60 is pulled up by the fixed pulley at the top of the fixed bracket 30 to extend the lifting platform 42 to travel the retracted length of the coil spring 50, that is, to complete the movement stroke of the lifting platform 42. Returning to the position of hook 87, hook 87 rotates under the downward pressure of button connecting rod 84. As a result, hook 87 rotates, it presses down on unlocking spring 85. Unlocking spring 85 deforms. After the user releases button 83, unlocking spring 85 returns to its original position, which in turn drives hook 87 to return to its original position, thus completing one transformation of the lifting table 1.

[0051] Furthermore, after the tray body 41 is fully unfolded, the tabletop 81 is still in a folded state. The tabletop 81 in this application is provided in two pieces, which are stacked by hinges. Therefore, when using it, the two tabletops 81 need to be unfolded by hinges, and the tabletop 81 needs to be rotated relative to the tabletop base 82 so that the tabletop 81 extends relative to the tabletop base 82 to ensure the usable range of the tabletop 81.

[0052] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism for a height-adjustable table, characterized in that, The lifting mechanism is applicable to the lifting tabletop with a fixed base assembly and a tabletop assembly, and the lifting mechanism includes: The system includes a fixed bracket, a coil spring, and a rope. The coil spring is wound around the bottom of the fixed bracket, and one end of the rope is connected to the coil spring to pass over the top of the fixed bracket. The other end of the rope is connected to the table assembly. The side of the table assembly is movably connected to the fixed bracket. The lifting table includes a retracted state and an extended state. When the lifting table is in the retracted state, the extended length of the coil spring is consistent with the travel distance of the table assembly relative to the fixed bracket. When the lifting table changes from the retracted state to the extended state, the extended coil spring retracts to drive the rope to pull the table assembly to complete the travel distance.

2. The lifting mechanism of the lifting table as described in claim 1, characterized in that, When the lifting table is in the retracted state, the unfolded part of the coil spring is located on one side of the fixed bracket.

3. The lifting mechanism of the lifting table as described in claim 1, characterized in that, A slot is provided between the bottom and the top of the fixed bracket, the slot extending from the bottom to the top of the fixed bracket, the slot being for the unfolded part of the coil spring to be placed.

4. The lifting mechanism of the lifting table as described in claim 1, characterized in that, The coil spring is wound around the bottom of the fixed bracket via a gear assembly, the gear assembly including: a coil spring shaft and a damping gear, the coil spring shaft being fixedly connected to the coil spring, the coil spring shaft meshing with the damping gear, and the extension and retraction of the coil spring driving the rotation of the coil spring shaft and the damping gear.

5. The lifting mechanism of the lifting table as described in any one of claims 1-4, characterized in that, The lifting mechanism also includes a lifting platform, which is rotatably connected to the table assembly. The fixed base assembly is provided with two opposing slide rails along the moving direction of the table assembly, thereby the lifting platform is slidably connected to the slide rails.

6. The lifting mechanism of the lifting table as described in claim 5, characterized in that, When the lifting table changes from the retracted state to the extended state, the lifting platform moves along the slide rail from the bottom to the top of the fixed bracket, and when the lifting platform reaches the top of the fixed bracket, the lifting platform self-locks relative to the slide rail.

7. The lifting mechanism of the lifting table as described in claim 6, characterized in that, The table assembly includes: a tray body and a platform body, wherein the tray body and the platform body are rotatably connected, and the lifting platform includes: A locking spindle and linkage assembly are provided, wherein the locking spindle is disposed through the platform body, the linkage assembly is connected to the lifting platform, and a groove is provided on the slide rail near the top position of the fixed bracket; When the table assembly moves to the top of the fixed bracket, the locking spindle drives the linkage component to engage in the groove, thereby fixing the lifting platform relative to the slide rail.

8. The lifting mechanism of the lifting table as described in claim 7, characterized in that, The linkage component includes: The first locking side shaft and the second locking side shaft are movably connected to the lifting platform. The first locking side shaft and the second locking side shaft are arranged opposite to each other, and the slide rails on both sides of the opposite arrangement are provided with the grooves corresponding to the first locking side shaft and the second locking side shaft. The locking spindle has an end that corresponds to the position where the first locking side shaft and the second locking side shaft are close to each other. The end of the locking spindle, the first locking side shaft, and the second locking side shaft are all wedge-shaped. The locking spindle is pressed down to squeeze and interfere with the first locking side shaft and the second locking side shaft through the wedge-shaped slope, so that the first locking side shaft and the second locking side shaft move away from each other to be embedded in the corresponding groove for fixation.

9. The lifting mechanism of the lifting table as described in claim 8, characterized in that, The tray body has a first recess of a first depth and a second recess of a second depth on two adjacent surfaces. The first recess and the second recess are smoothly transitioned. The locking spindle can move between the first recess and the second recess by rotating the tray body relative to the platform body. Wherein, the first depth is less than the second depth, and when the locking spindle moves from the second recess to the first recess, the end of the locking spindle near the linkage component extends to drive the linkage component to engage in the groove.

10. The lifting mechanism of the lifting table as described in claim 9, characterized in that, The locking spindle is fitted with an elastic element. When the locking spindle moves from the first recess into the second recess, the elastic element can drive the locking spindle to reset and spring back, so that the locking spindle separates from the first locking side shaft and the second locking side shaft. The first locking side shaft and the second locking side shaft move closer to each other to release the self-locking.

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