Desktop stretching and retracting method and electric stretching and retracting table

Abstract

The invention relates to the technical field of furniture, in particular to a table top stretching and retracting method and an electric telescopic table, and the electric telescopic table comprises a first table plate and two second table plates arranged in a sliding mode; the method comprises a first switching method for switching the electric telescopic table from an unfolded state to a folded state and a second switching method for switching the electric telescopic table from the folded state to the unfolded state, and the two second table plates leave a passing space for the first table plate through translation and are spliced to form the folded state or the unfolded state. The first table plate is spliced with the second table plate through lifting and rotating to form an unfolded state or hidden at the bottom of the second table plate to form an unfolded state. According to the telescopic method, the space utilization rate is high, the clearance height before and after the first table plate is unfolded is not changed, and the attractiveness is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture, and more specifically, to a tabletop extension method and an electric extension table. Background Art

[0002] As one of the important furniture, the table has derived a variety of multifunctional tables with the increasing demand of users. Among them, the telescopic table is a table with adjustable desktop size. Its advantages mainly include space saving, flexibility and versatility. It can be stretched or shrunk as needed to adapt to different occasions and the number of people, and is especially suitable for small-sized families. For example, it can be shrunk to a smaller size at ordinary times and stretched out for use when needed. Users can adjust the size of the dining table according to actual needs to suit different numbers of people. Compared with a fixed-size dining table, it can provide more functions in a limited space. However, the telescopic tables commonly available on the market are relatively heavy, and the table top used for expansion is exposed when stored, which is not beautiful and has a poor user experience.

[0003] The Chinese patent of the prior art CN202211721681.1 discloses an electric telescopic table and a method of using the same, comprising a desktop, the bottom of both ends of the desktop are movably connected with an expansion board through a hinge, both sides of the middle of the lower surface of the desktop are movably connected with a baffle through a pin, the upper surface of one end of the baffle is fitted with the expansion board, and the four corners of the lower surface of the desktop are fixed with legs, and both sides of the upper ends of the legs are fixedly connected with the desktop through a reinforcing plate. The present invention is provided with expansion boards at both ends of the desktop, the expansion boards are hidden under the desktop when not in use, and are blocked and limited by the baffles, which does not affect the normal use of the desk. When expansion is required, the expansion board is released by rotating the baffle, and then the expansion board is rotated, and the limit plate is moved into the groove on the expansion board, so that the expansion board can be limited, so that the expansion board can be quickly and stably expanded, thereby improving the expansion efficiency of the device, but the expansion board of the technical solution is exposed when stored, and the aesthetics is poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiency of the prior art electric retractable table that the extension plate is exposed when stored, and to propose a desktop retracting method, which makes the extended table board not exposed when stored, and the desktop frame has better integrity and better user experience.

[0005] To achieve the above-mentioned purpose, the present invention provides a tabletop extension method, wherein the electric extendable table comprises a first tabletop and two second tabletops arranged in a sliding manner; the method comprises a first switching method for switching the electric extendable table from an extended state to a folded state and a second switching method for switching the folded state to an extended state;

[0006] The first switching method includes: controlling the two second table boards to translate outwards respectively, controlling the first table board to move upwards to a height higher than the second table board, controlling the first table board to rotate α, where α is (0°, 90°], controlling the first table board to move downwards to a height lower than the second table board, and controlling the two second table boards to translate inwards respectively until the ends of the two second table boards abut against each other;

[0007] The second switching method includes: controlling the two second table boards to translate outward respectively, controlling the first table board to move upward to a height higher than the second table board, controlling the first table board to rotate α, controlling the first table board to move downward to a height flush with the second table board, and controlling the two second table boards to translate inward respectively until the two second table boards are abutted against the two ends of the first table board.

[0008] In the present technical solution, the first table board is raised to a position higher than the second table board so that the rotation of the first table board is not restricted by the positions of the second table boards on both sides, shortening the translation distance required for the second table board to avoid the first table board, high space utilization, a more compact overall structure, and reduced space requirements for shape transformation. In the folded state, the first table board is rotated and stored at the bottom of the two second table boards. After the two second table boards are spliced ​​together, the first table board is completely hidden, and the edge of the first table board is not exposed, making the appearance more beautiful, and the clearance height remains unchanged before and after the state switching, which is convenient for users to use and provides a good experience.

[0009] As a preferred solution, in order to make the expansion and retraction of the two second table tops more coordinated, controlling the two second table tops to translate outwards respectively and controlling the two second table tops to translate inwards respectively are both: controlling the two second table tops to move synchronously in opposite directions at the same rate.

[0010] As a preferred solution, in order to make the first table top translate upward or downward, the control of the first table top moving upward and the control of the first table top moving downward include: a driving step of inputting a rotational drive, a first transmission step of converting the rotational drive into a horizontal linear motion, a second transmission step of converting the horizontal linear motion into a vertical linear motion, and a step of vertical linear motion of the first table top.

[0011] As a preferred solution, in order to keep the first table top in a translational posture without tilting during movement, when controlling the first table top to move upward and when controlling the first table top to move downward, at least three different areas of the first table top are controlled to move synchronously.

[0012] As a preferred solution, in order to move the second table top into place when it is in a folded state or an unfolded state, the two second table tops are controlled to translate inward respectively: including the step of positioning the relative position between the first table top and the second table top; or including the step of positioning the relative position between the two second table tops.

[0013] To achieve the above-mentioned purpose, the present invention provides an electric retractable table for implementing the above-mentioned retractable method, comprising a bracket, table legs, a lifting assembly including a second drive device, a rotating assembly including a third drive device, a first table board, two translation assemblies including the first drive device, and two second table boards movably spliced ​​on both sides of the first table board, the table legs are installed at the bottom of the bracket, the two translation assemblies are respectively installed on both sides of the bracket, and the second table boards are respectively arranged at both ends of the bracket, the bracket has a storage space for storing the first table board, the lifting assembly and the rotating assembly, the power output end of the rotating assembly is connected to the lifting assembly, the power output end of the lifting assembly is connected to the first table board, the power output end of the translation assembly is connected to the second table board, and the bracket is also provided with a controller electrically connected to the first drive device, the second drive device and the third drive device.

[0014] In this technical solution, when in the folded state, the two second table tops are spliced ​​together, and the first table top is stored in the accommodating space in the bracket in a horizontal posture. The first table top is completely hidden, and the edge of the first table top is not exposed, making the appearance of the telescopic table more beautiful.

[0015] When the folded state is switched to the unfolded state, the controller controls the first driving device to drive the translation components on both sides of the bracket to translate the two second table boards to the left and right sides respectively, reserving space for the passage of the first table board, and then controls the second driving device to drive the lifting component to lift the first table board to a height higher than the height of the second table board to avoid collision with the second table boards on both sides when the first table board rotates, and then controls the third driving device to drive the rotating component to rotate the first table board by α, where α is (0°, 90°], controls the second driving device to drive the lifting component to lower the first table board to a height equal to that of the second table board, and finally controls the translation component to splice the second table boards on both sides to the two sides of the first table board to form an unfolded state.

[0016] When the unfolded state is switched to the folded state, the controller controls the first driving device to drive the translation components on both sides of the bracket to translate the two second table boards to the left and right sides respectively, reserving space for the passage of the first table board, and then controls the second driving device to drive the lifting component to lift the first table board to a height higher than the height of the second table board to avoid collision with the second table boards on both sides when the first table board rotates, then controls the third driving device to drive the rotating component to rotate the first table board α, and then controls the second driving device to drive the lifting component to lower the first table board and store it in the accommodating space, and finally controls the translation component to splice the second table boards on both sides to form a folded state. The electric telescopic table of this scheme can realize automatic switching of shapes, and the clearance height remains unchanged before and after unfolding, which is convenient for users to use and has a good experience.

[0017] As a preferred solution, in order to accommodate the first table top to make the appearance of the electric retractable table more beautiful, cross beams are fixed on both sides of the bracket, and the accommodating space is arranged between the two cross beams. The width of the first table top is adapted to the distance between the two cross beams, and the length of the first table top is smaller than the splicing length of the two second table tops.

[0018] As a preferred solution, in order to make the two second table boards move synchronously, each of the translation components includes a first slide rail and a plurality of first sliders, each of the first slide rails is connected to each of the cross beams, and the plurality of first sliders are slidably connected to each of the first slide rails, each of the second table boards is connected to each of the first sliders, and both ends of each of the cross beams are rotatably connected to a first guide wheel, and a first synchronous belt corresponding to the position of the first slide rails is wound around the two first guide wheels, and a power output end of the first driving device is connected to the middle part of the first synchronous belt to drive the first synchronous belt to circulate, and a first slider connected to one of the second table boards is connected to one side of the first synchronous belt, and a first slider connected to the other second table board is connected to the other side of the first synchronous belt, and pressure wheels are respectively provided on both sides of the first synchronous belt, and the pressure wheels are used to press the first synchronous belt against the power output end of the first driving device to ensure that the first synchronous belt does not slip.

[0019] As a preferred solution, in order to lift the first table board, the lifting assembly includes a screw, a second slide rail, two second sliders and two connecting rods, the screw is rotatably connected to the bracket through a provided mounting seat, the second slide rail is installed on the bracket and corresponds to the position of the screw, the two second sliders are respectively slidably connected to the two ends of the second slide rail, the left and right sections of the screw are threads with opposite rotation directions, the two second sliders are respectively provided with threaded holes adapted to the two sections of the screw threads, the two second sliders are respectively threadedly connected to the screw, the power output end of the second driving device is connected to one end of the screw, the bottoms of the two connecting rods are respectively rotatably connected to the two second sliders, and the tops of the two connecting rods are respectively rotatably connected to the bottom of the rotating assembly, and the power output end of the second driving device drives the screw to rotate so that the second sliders located on its left and right sides are respectively moved away from or approached, so as to drive the bottoms of the two connecting rods to move away from or approached, thereby realizing the lowering or rising of the first table board on the rotating assembly.

[0020] As a preferred solution, in order to rotate the first table top, the rotating assembly includes a base and a turntable, the bottom of the base is rotatably connected to the top of the connecting rod, the turntable is rotatably installed on the top of the base, the first table top is connected to the turntable, and the power output end of the third driving device is connected to the turntable.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The telescopic method of the present invention reserves space for the passage of the first table board by controlling the translation of the two second table boards. The first table board is spliced ​​with the second table boards on both sides through lifting and rotating to complete the expansion of the desktop. The structure is compact, the space utilization rate is high, the space requirement for state switching is small, the application scenarios are wide, and the clearance height before and after the state switching remains unchanged, which is easy to use.

[0023] 2. When the present invention is in a folded state, the first table board is hidden at the bottom of the two second table boards, and the edge of the first table board is not exposed, so the structure is more compact and the appearance is higher.

[0024] 3. The present invention controls the first drive device, the second drive device and the third drive device through a controller to respectively drive the translation of the second table top and the lifting and rotation of the first table top, thereby realizing the automatic expansion and retraction of the electric retractable table with a compact structure.

[0025] 4. The present invention realizes synchronous movement of the two second table tops through the first synchronous belt, and the state switching action is more coordinated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an exploded schematic diagram of the electric retractable table of the present invention;

[0027] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0028] Figure 3 It is a schematic diagram of the structure of the lifting assembly and the rotating assembly;

[0029] Figure 4 is a schematic diagram of the electric retractable table of the present invention in an unfolded state;

[0030] Figure 5 is a schematic diagram of the electric retractable table of the present invention in a folded state;

[0031] Figure 6 yes Figure 4 A magnified schematic diagram of part B;

[0032] Figure 7 is a schematic diagram of the position of the first table board in a folded state;

[0033] Figure 8 Schematic diagram of the position of the first table top in the unfolded state.

[0034] In the figure: the first table top 1; the second table top 2; the supporting arm 21; the bracket 3; the crossbeam 31; the accommodating space 32; the table leg 4; the translation assembly 5; the first slide rail 51; the first slider 52; the first driving device 53; the first guide wheel 54; the first synchronous belt 55; the pressure wheel 56; the lifting assembly 6; the screw rod 61; the second slide rail 62; the second slider 63; the connecting rod 64; the second guide wheel 65; the second synchronous belt 66; the second driving device 67; the rotating assembly 7; the base 71; the turntable 72; the third driving device 73; the limit device 8; the limit pin 81; the limit hole 82; the controller 9. DETAILED DESCRIPTION

[0035] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0038] Embodiment 1:

[0039] like Figure 7 , 8 As shown, this embodiment provides a tabletop extension method, wherein the electric retractable table comprises a first tabletop 1 and two sliding second tabletops 2; the method comprises a first switching method for switching the electric retractable table from an unfolded state to a folded state and a second switching method for switching from a folded state to an unfolded state;

[0040] The first switching method includes: controlling the two second table boards 2 to translate outwards respectively, controlling the first table board 1 to move upwards to a height higher than the second table board 2, controlling the first table board 1 to rotate α, where α is (0°, 90°], controlling the first table board 1 to move downwards to a height lower than the second table board 2, and controlling the two second table boards 2 to translate inwards respectively until the ends of the two second table boards 2 abut against each other;

[0041] The second switching method includes: controlling the two second table boards 2 to translate outward respectively, controlling the first table board 1 to move upward to a height higher than the second table board 2, controlling the first table board 1 to rotate α, controlling the first table board 1 to move downward to a height flush with the second table board 2, and controlling the two second table boards 2 to translate inward respectively until the two second table boards 2 are in contact with the two ends of the first table board 1.

[0042] In this embodiment, α is preferably 90°, in which case the first table top 1 and the second table top 2 are both rectangular. When α is other angles, the first table top 1 and the second table top 2 are parallelograms.

[0043] Specifically, controlling the two second table boards 2 to translate outwards respectively and controlling the two second table boards 2 to translate inwards respectively both mean: controlling the two second table boards 2 to move synchronously in opposite directions at the same speed, so that the movement of the second table boards 2 is more coordinated.

[0044] Specifically, controlling the first table top 1 to move upward and controlling the first table top 1 to move downward include: a driving step of inputting a rotational drive, a first transmission step of converting the rotational drive into a horizontal linear motion, a second transmission step of converting the horizontal linear motion into a vertical linear motion, and a step of vertical linear motion of the first table top 1.

[0045] Specifically, when controlling the first table top 1 to move upward and controlling the first table top 1 to move downward, at least three different regions of the first table top 1 are controlled to move synchronously, so that the first table top 1 can achieve translation without tilting.

[0046] Specifically, the controlling of the two second table tops 2 to translate inwards respectively includes: a step of positioning the relative position between the first table top 1 and the second table top 2; or a step of positioning the relative position between the two second table tops 2.

[0047] Embodiment 2:

[0048] like Figures 1 to 5 , 7 and 8, this embodiment provides an electric telescopic table for the above-mentioned telescopic method, including a bracket 3, table legs 4, a lifting assembly 6 including a second drive device 67, a rotating assembly 7 including a third drive device 73, a first table board 1, two translation assemblies 5 including a first drive device 53, and two second table boards 2 movably spliced ​​on both sides of the first table board 1, the table legs 4 are installed at the bottom of the bracket 3, the two translation assemblies 5 are respectively installed on both sides of the bracket 3, and each of the second table boards 2 is respectively arranged at both ends of the bracket 3, and the bracket 3 has a storage container for the first table board 1, the lifting assembly 6 and the rotating assembly 7. The space 32 is arranged, the power output end of the rotating component 7 is connected to the lifting component 6, the power output end of the lifting component 6 is connected to the first table top 1, the power output end of the translation component 5 is connected to the second table top 2, and the bracket 3 is also provided with a controller 9 electrically connected to the first driving device 53, the second driving device 67 and the third driving device 73, and the controller 9 is provided with a control unit for controlling the operation of the first driving device 53, the second driving device 67 and the third driving device 73 and a monitoring unit for monitoring the operating status of the first driving device 53, the second driving device 67 and the third driving device 73.

[0049] In this embodiment, before and after the expansion, the use height of the electric retractable table remains unchanged, the clearance height under the table is 750mm, the space under the table is large, the comfort level is high, and the user experience is good.

[0050] In this embodiment, the first drive device 53, the second drive device 67 and the third drive device 73 are servo motors, and the control unit in the controller 9 controls the above motors respectively, so as to accurately adjust the sliding distance of the second table top 2, the lifting height of the first table top 1 and the rotation angle of the first table top 1. Among them, the monitoring unit in the controller 9 monitors the current changes of the above motors respectively, so as to determine whether an obstacle is encountered and stop in time, thereby realizing the anti-pinch finger function, with high safety. The electric retractable table is powered by batteries, has low requirements for the use environment, and is more convenient to use.

[0051] Specifically, Figure 1 , 4 As shown in Figures 7 and 8, beams 31 are fixed on both sides of the bracket 3, and the accommodating space 32 is arranged between the two beams 31. The width of the first table board 1 is adapted to the distance between the two beams 31, and the length of the first table board 1 is smaller than the splicing length of the two second table boards 2.

[0052] In this embodiment, the first table top 1 can be rotated 90 degrees and raised and lowered, so that it can be placed horizontally in the accommodation space 32 and at the bottom of the first table top 2 in the initial stage. Figure 7 As shown, the length of the first table top 1 is smaller than the joint length of the two second table tops 2, so that the first table top 1 is hidden in the bracket 3 and its edge is not exposed, thereby making the appearance of the electric retractable table of the present invention more beautiful.

[0053] Specifically, Figure 1 , 2 As shown, the two translation assemblies 5 are arranged mirror-symmetrically about the middle part of the bracket 3, and each of the translation assemblies 5 includes a first slide rail 51 and a plurality of first sliders 52, each of the first slide rails 51 is connected to each of the cross beams 31, and a plurality of the first sliders 52 are slidably connected to each of the first slide rails 51, each of the second table tops 2 is connected to each of the first sliders 52, and both ends of each of the cross beams 31 are rotatably connected to a first guide wheel 54, and a first synchronous belt 55 corresponding to the position of the first slide rail 51 is wound around the two first guide wheels 54, and the first driving device 5 3 is installed in the middle of the crossbeam 31, the power output end of the first driving device 53 is connected to the middle of the first synchronous belt 55 to drive the first synchronous belt 55 to circulate, one of the first sliders 52 connected to the second table board 2 is connected to one side of the first synchronous belt 55, and the other first slider 52 connected to the second table board 2 is connected to the other side of the first synchronous belt 55, and the first synchronous belt 55 is provided with a clamping wheel 56 on both sides, and the clamping wheel 56 is used to clamp the first synchronous belt 55 to the power output end of the first driving device 53.

[0054] In this embodiment, support arms 21 are respectively provided on both sides of the bottom of each second table top 2, and each support arm 21 is respectively connected to the first slider 52. A pulley is also provided on the first slider 52 to reduce the friction between it and the first slide rail 51, so that the movement of the second table top 2 is smoother. Driven by the first synchronous belt 55, the two second table tops 2 can move synchronously. The upper and lower ends of the power output end of the first driving device 53 are respectively connected to the upper and lower inner sides of the first synchronous belt 55, wherein the clamping wheel 56 can ensure the reliability of the connection between the power output end and the first synchronous belt 55. In addition to using the synchronous belt transmission method, the screw transmission method can also be used to drive the first slider 52 to slide to avoid slipping.

[0055] Specifically, Figure 1 , 3 As shown, the lifting assembly 6 includes a screw 61, a second slide rail 62, two second sliders 63 and two connecting rods 64. The screw 61 is rotatably connected to the bracket 3 through a provided mounting seat. The second slide rail 62 is installed on the bracket 3 and corresponds to the position of the screw 61. The two second sliders 63 are respectively slidably connected to the two ends of the second slide rail 62. The left and right sections of the screw 61 are threads with opposite rotation directions. The two second sliders 63 are respectively provided with threaded holes adapted to the two sections of the threads of the screw 61. The two second sliders 63 are respectively threadedly connected to the screw 61. The power output end of the second driving device 67 is connected to one end of the screw 61. The bottoms of the two connecting rods 64 are respectively rotatably connected to the two second sliders 63, and the tops of the two connecting rods 64 are respectively rotatably connected to the bottom of the rotating assembly 7.

[0056] In this embodiment, the first table board 1 can be lifted by the lifting assembly 6. After being lifted, the first table board 1 is at a different horizontal height from the second table board 2. The first table board 1 does not interfere with the second table board 2 when rotating. After the second table board 2 slides to both sides through the translation assembly 5, only a distance between the second table boards 2 that is adapted to the longer side of the first table board 1 is required to meet the need for the first table board 1 to descend and pass through, thereby reducing the space requirements for the shape transformation of the telescopic table of the present invention. When the first table board 1 rotates 90° to form a horizontal posture, the shorter side of the first table board 1 can be accommodated between the two beams 31, resulting in high space utilization and a more compact structure.

[0057] Specifically, Figure 3As shown, there are four lifting assemblies 6, which are respectively arranged at the four corners of the bottom of the rotating assembly 7, and the screws 61 in the two lifting assemblies 6 on the same side are connected end to end, and one end of the screws 61 on both sides is respectively fixed with a second guide wheel 65, and the two second guide wheels 65 are wound with a second synchronous belt 66, and the power output end of the second driving device 67 is connected to the other end of the screw 61 on one side.

[0058] In this embodiment, two lifting assemblies 6 on the same side form a group, and the screw rods 61 in the same group are connected end to end through a coupling. At the same time, the two groups of screw rods 61 are connected by a second synchronous belt 66 to ensure that the four screw rods 61 can rotate synchronously.

[0059] Specifically, Figure 3 As shown, the rotating assembly 7 includes a base 71 and a turntable 72. The bottom of the base 71 is rotatably connected to the top of the connecting rod 64. The turntable 72 is rotatably installed on the top of the base 71. The first table top 1 is connected to the turntable 72. The power output end of the third driving device 73 is connected to the turntable 72.

[0060] In this embodiment, the third driving device 73 is fixed to the bottom of the base 71 , the edge of the turntable 72 is provided with teeth, and the power output end of the third driving device 73 is connected to a transmission gear, which passes through the base 71 and meshes with the teeth on the turntable 72 .

[0061] In this embodiment, the monitoring unit monitors the power output ends of the first drive device 53, the second drive device 67 and the third drive device 73 respectively. If it is detected that the power output ends of the first drive device 53, the second drive device 67 and the third drive device 73 encounter resistance, the control unit controls the corresponding power output ends of the first drive device 53, the second drive device 67 and the third drive device 73 to stop.

[0062] In this embodiment, the monitoring unit can be used to implement the hand-pinch prevention function of the electric retractable table of the present invention, thereby improving the safety of use.

[0063] Specifically, the translation speed of the second table top 2 is 40 mm to 80 mm / s, the lifting speed of the first table top 1 is 10 mm to 20 mm / s, and the rotation speed of the first table top 1 is 10 rad / s to 20 rad / s.

[0064] Embodiment 3:

[0065] This embodiment is similar to Embodiment 2, except that, in this embodiment, Figure 6As shown, the joint sides of the first table top 1 and the second table top 2 are respectively provided with limiting devices 8, one of the limiting devices 8 is provided with a limiting pin 81, and the other limiting device 8 is provided with a limiting hole 82 adapted to the limiting pin 81.

[0066] In this embodiment, the splicing sides of the first table board 1 and the second table board 2 are respectively provided with limiting devices 8, one of the limiting devices 8 is provided with a limiting pin 81, and the other limiting device 8 is provided with a limiting hole 82 adapted to the limiting pin 81, and when the first table board 1 and the second table board 2 are spliced, the limiting pin 81 is inserted into the limiting hole 82.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0068] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for extending and retracting a tabletop, wherein an electrically retractable table comprises a first tabletop (1) and two second tabletops (2) arranged in a sliding manner; characterized in that: The method includes a first switching method for switching the electric telescopic table from an unfolded state to a folded state and a second switching method for switching from a folded state to an unfolded state; The first switching method comprises: controlling the two second table boards (2) to translate outwards respectively, controlling the first table board (1) to move upwards to a height higher than the second table board (2), controlling the first table board (1) to rotate by α, wherein α is (0°, 90°], controlling the first table board (1) to move downwards to a height lower than the second table board (2), and controlling the two second table boards (2) to translate inwards respectively until the ends of the two second table boards (2) abut against each other; The second switching method comprises: controlling the two second table boards (2) to translate outwards respectively, controlling the first table board (1) to move upwards to a height higher than the second table board (2), controlling the first table board (1) to rotate by α, controlling the first table board (1) to move downwards to a height flush with the second table board (2), and controlling the two second table boards (2) to translate inwards respectively until the two second table boards (2) are in contact with the two ends of the first table board (1).

2. The desktop extension method according to claim 1, characterized in that: Said controlling the two second table tops (2) to translate outwards respectively and said controlling the two second table tops (2) to translate inwards respectively both involve: controlling the two second table tops (2) to move synchronously in opposite directions at the same speed.

3. The method for extending and retracting an electric retractable table according to claim 1, characterized in that: The control of the first table top (1) to move upward and the control of the first table top (1) to move downward include: a driving step of inputting a rotational drive, a first transmission step of converting the rotational drive into a horizontal linear motion, a second transmission step of converting the horizontal linear motion into a vertical linear motion, and a step of vertical linear motion of the first table top (1).

4. The method for extending and retracting an electric retractable table according to claim 3, characterized in that: When the first table top (1) is controlled to move upward and when the first table top (1) is controlled to move downward, at least three different areas of the first table top (1) are controlled to move synchronously.

5. The method for extending and retracting an electric retractable table according to claim 1, characterized in that: The step of controlling the two second table tops (2) to respectively translate inwards comprises the step of positioning the relative position between the first table top (1) and the second table top (2); or comprises the step of positioning the relative position between the two second table tops (2).

6. An electric retractable table for implementing the retractable method according to any one of claims 1 to 5, characterized in that: The table comprises a support (3), table legs (4), a lifting assembly (6) including a second driving device (67), a rotating assembly (7) including a third driving device (73), a first table board (1), two translation assemblies (5) including a first driving device (53), and two second table boards (2) movably connected to both sides of the first table board (1), wherein the table legs (4) are mounted on the bottom of the support (3), the two translation assemblies (5) are respectively mounted on both sides of the support (3), and each of the second table boards (2) is respectively arranged on both sides of the support (3). The support (3) has a storage space (32) for storing the first table top (1), the lifting assembly (6) and the rotating assembly (7); the power output end of the rotating assembly (7) is connected to the lifting assembly (6); the power output end of the lifting assembly (6) is connected to the first table top (1); the power output end of the translation assembly (5) is connected to the second table top (2); and the support (3) is also provided with a controller (9) electrically connected to the first drive device (53), the second drive device (67) and the third drive device (73).

7. The electric retractable table according to claim 6, characterized in that: Crossbeams (31) are fixed on both sides of the bracket (3), and the accommodating space (32) is arranged between the two crossbeams (31). The width of the first table top (1) is adapted to the distance between the two crossbeams (31), and the length of the first table top (1) is less than the splicing length of the two second table tops (2).

8. The electric retractable table according to claim 7, characterized in that: Each of the translation assemblies (5) comprises a first slide rail (51) and a plurality of first sliders (52), each of the first slide rails (51) is connected to each of the cross beams (31), and a plurality of the first sliders (52) are respectively slidably connected to each of the first slide rails (51), and each of the second table tops (2) is respectively connected to each of the first sliders (52). The two ends of each of the cross beams (31) are respectively rotatably connected to a first guide wheel (54), and a first synchronous belt (55) corresponding to the position of the first slide rail (51) is wound around the two first guide wheels (54). The power output end of the first driving device (53) is connected to the middle part of the first synchronous belt (55) to drive the first synchronous belt (55) to circulate, and each of the first sliders (52) is respectively connected to the first synchronous belt (55).

9. The electric retractable table according to claim 6, characterized in that: The lifting assembly (6) comprises a screw (61), a second slide rail (62), two second sliders (63) and two connecting rods (64); the screw (61) is rotatably connected to the bracket (3) through a provided mounting seat; the second slide rail (62) is mounted on the bracket (3) and corresponds to the position of the screw (61); the two second sliders (63) are respectively slidably connected to the two ends of the second slide rail (62); the left and right sections of the screw (61) are respectively threads with opposite rotation directions; the two second sliders (63) are respectively provided with threaded holes adapted to the two sections of the threads of the screw (61); the two second sliders (63) are respectively threadedly connected to the screw (61); the power output end of the second driving device (67) is connected to one end of the screw (61); the bottoms of the two connecting rods (64) are respectively rotatably connected to the two second sliders (63); and the tops of the two connecting rods (64) are respectively rotatably connected to the bottom of the rotating assembly (7).

10. The electric retractable table according to claim 9, characterized in that: The rotating assembly (7) includes a base (71) and a turntable (72), the bottom of the base (71) is rotatably connected to the top of the connecting rod (64), the turntable (72) is rotatably mounted on the top of the base (71), the first table top (1) is connected to the turntable (72), and the power output end of the third driving device (73) is connected to the turntable (72).

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