Rocker arm flip-up extension table

Abstract

This application provides a rocker arm flip-up extension table, relating to the field of extension table technology. The rocker arm flip-up extension table includes: a main tabletop, a sliding frame, and a secondary tabletop; the sliding frame slides relative to the main tabletop in a first direction to a first position and a second position. In the first position, the sliding frame is hidden under the main tabletop; in the second position, the sliding frame is exposed on the main tabletop. The sliding frame has at least two pairs of sliding grooves, each pair of which extends along the first direction. The secondary tabletop is installed within the frame of the sliding frame, and a sliding shaft is provided on the side of the secondary tabletop away from the main tabletop. The number of sliding shafts is the same as the number of pairs of sliding grooves and corresponds one-to-one. The two ends of a single sliding shaft are respectively placed in the same pair of sliding grooves. Pushing and opening the secondary tabletop in a second direction perpendicular to the first direction causes the sliding shafts to slide within the sliding grooves. When the sliding shafts are in place, the surface of the secondary tabletop and the surface of the main tabletop are on the same horizontal plane. This application simplifies the structure, making unfolding or folding smoother.

Description

Technical Field

[0001] This application relates to the field of extension tables, and more specifically, to a rocker arm flip-up extension table. Background Technology

[0002] With the continuous development of furniture design and manufacturing technology, various functional tables have gradually entered people's daily lives. Especially in scenarios where space utilization efficiency is crucial, extendable tables, as a type of furniture that expands usable space, are widely used. Common extendable tables typically consist of a main table body and an extendable panel, with the extension panel being pulled out, unfolded, and fixed through a specific mechanical structure.

[0003] To achieve the upward unfolding action of the extension plate, existing technologies often employ complex linkage mechanisms or slide rail guide systems. These structures typically require multiple cooperating components, such as guide grooves, rollers, hinges, and elastic elements, to ensure that the extension plate can smoothly transition from a horizontally folded state to an upward-tilted use state during unfolding. Because this process relies on precise component fit and motion guidance, the overall opening structure is quite complex, assembly is difficult, and high requirements are placed on the machining accuracy and durability of the parts. Utility Model Content

[0004] The purpose of this application is to provide a rocker arm flip-up extension table that can simultaneously tilt and slide, simplifying the structure and making it easier to unfold or store.

[0005] This utility model provides a rocker arm flip-up extension table, which includes: Main table; The sliding frame slides relative to the main tabletop in a first direction to a first position and a second position. In the first position, the sliding frame is hidden under the main tabletop, and in the second position, the sliding frame is exposed on the main tabletop. The sliding frame is provided with at least two pairs of sliding grooves, and the sliding groove in each pair extends along the first direction. A secondary table is installed within the frame of a sliding frame, and a sliding shaft is provided on the side of the secondary table away from the main table. The number of sliding shafts is the same as the number of pairs of sliding grooves and they correspond one-to-one. The two ends of a single sliding shaft are respectively placed in the same pair of sliding grooves. The secondary table is pushed and opened along a second direction perpendicular to the first direction. The sliding shaft slides within the sliding groove. When the sliding shaft is in place, the surface of the secondary table is on the same horizontal plane as the surface of the main table.

[0006] In an optional embodiment, the sliding frame is rectangular and includes a first connector, a second connector, a third connector, and a fourth connector. The first connector and the second connector are arranged parallel to each other, and the third connector and the fourth connector are arranged parallel to each other. The third connector is perpendicularly adjacent to the first connector. The third connector and the fourth connector are respectively provided with the sliding grooves on the same straight line. A sliding groove on the third connector and a sliding groove on the fourth connector are a pair.

[0007] In an optional embodiment, the displacement vectors of the two pairs of sliding grooves are equal in the second direction, and the displacement vectors of the two pairs of sliding grooves are equal in a third direction that is perpendicular to both the first and second directions.

[0008] In an optional embodiment, the sliding path of the first pair of sliding grooves includes an upper inclined section and a horizontal section, and in the second direction, the ratio of the displacement vector of the upper inclined section to the displacement vector of the horizontal section is 7:1.

[0009] In an optional embodiment, the first pair of sliding grooves and the second pair of sliding grooves are arranged sequentially along the second direction. The sliding path of the second pair of sliding grooves includes a ramp section, an arc section, and a horizontal movement section. In the second direction, the ratio of the displacement vector of the ramp section, the displacement vector of the arc section, and the displacement vector of the horizontal movement section is 1:1:5.

[0010] In an optional embodiment, the sliding frame and the main tabletop are slidably connected by two sets of three-section rails. The two sets of three-section rails are symmetrically arranged along the center line of the main tabletop, and the center line is perpendicular to the second direction. Each set of three-section rails includes a first sliding rail, a second sliding rail, and a third sliding rail that are slidably connected in sequence. The two first sliding rails are respectively fixedly connected to the main tabletop, one third sliding rail constitutes the first connecting member, and one third sliding rail constitutes the second connecting member.

[0011] In an optional embodiment, the rocker arm flip-up extension table further includes a first leveling component and a second leveling component. The first leveling component and the second leveling component are disposed on the side of the sub-table away from the main table. When slid into place, the first leveling component is located between the sub-table and the first connecting component, and the second leveling component is located between the sub-table and the second connecting component.

[0012] In an optional embodiment, along the second direction, the sliding shaft slides relative to the sliding groove between an initial position and a final position. At the final position, the size of the sliding groove is larger than the size of the sliding shaft. At positions other than the final position, the sliding groove and the sliding shaft are in clearance fit.

[0013] In an optional embodiment, the sub-table includes a first sub-table and a second sub-table, the sliding shaft is disposed on the side of the first sub-table away from the main table, and the second sub-table is hinged to the first sub-table and folded on the side of the first sub-table closer to the main table.

[0014] In an optional embodiment, the sub-table further includes a support shaft and a connector. One end of the connector is rotatably connected to the support shaft, and the other end of the connector is rotatably connected to the second sub-table, so that the second sub-table is flipped open and each of the sliding shafts slides.

[0015] Compared to existing technologies, the beneficial effects of this application are: This application achieves two states for the secondary tabletop: concealed within the main tabletop and exposed within it, by installing the secondary tabletop inside a sliding frame that is slidably connected to the main tabletop. Furthermore, by utilizing two pairs of sliding grooves and sliding shafts, this application can simultaneously achieve sliding and tilting, simplifying the structure and making unfolding or folding smoother. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of the rocker arm flip-up extension table in a folded state is shown in some embodiments; Figure 2 A three-dimensional structural diagram of the exposed sliding frame is shown in some embodiments; Figure 3 The diagram shows the connection between the sliding frame, the sub-table, and the first leveling component in some embodiments; Figure 4 A plan view of the sliding groove is shown in some embodiments; Figure 5 A schematic diagram of the planar structure of the rocker arm flip-up extension table in an open state is shown in some embodiments; Figure 6 The diagrams showing the connection between the support shaft and the connector in some embodiments are illustrated. Figure 7 A three-dimensional structural diagram of the second tabletop being flipped open relative to the first tabletop is shown in some embodiments; Figure 8A three-dimensional structural diagram is shown in some embodiments where the second tabletop is further opened relative to the first tabletop; Figure 9 A three-dimensional structural diagram is shown in some embodiments, in which the second tabletop is fully opened relative to the first tabletop.

[0018] Explanation of key component symbols: 100-Main tabletop; 200-Sliding frame; 210-First connector; 220-Second connector; 230-Third connector; 240-Fourth connector; 201-First pair of sliding grooves; 201a-Upper inclined section; 201b-Horizontal section; 202-Second pair of sliding grooves; 202a-Slope section; 202b-Arc section; 202c-Horizontal moving section; 300-Secondary tabletop; 310-First secondary tabletop; 320-Secondary secondary tabletop; 330-Sliding shaft; 340-Hinge; 350-Support shaft; 360-Connector; 400-Three-section rail; 410-First sliding rail; 420-Second sliding rail; 430-Third sliding rail; 500-First leveling component; 600-Second leveling component. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] This embodiment applies to folding rocker arm extension tables. When the rocker arm extension table is opened, the tabletop is square, round, oval, or horse-belly shaped, etc. This embodiment takes a square rocker arm extension table as an example for explanation. The bottom of the rocker arm extension table is a leg. The leg is common knowledge in the field, and it will not be described in detail here.

[0025] Please see Figure 1 and Figure 2 This embodiment provides a rocker arm flip-up extension table, which includes a main tabletop 100, a sliding frame 200, and a secondary tabletop 300.

[0026] The main tabletop is rectangular.

[0027] The sliding frame 200 slides relative to the main tabletop 100 in a first direction to a first position and a second position. In the first position, the sliding frame 200 is hidden under the main tabletop 100, and in the second position, the sliding frame 200 is exposed on the main tabletop 100. The sliding frame 200 is provided with at least two pairs of sliding grooves, and the sliding grooves in each pair extend along a first direction.

[0028] Please see Figure 3 and Figure 4The sliding frame 200 is rectangular and includes a first connector 210, a second connector 220, a third connector 230, and a fourth connector 240. The first connector 210 and the second connector 220 are arranged in parallel, and the third connector 230 and the fourth connector 240 are arranged in parallel. The third connector 230 is perpendicularly adjacent to the first connector 210. The third connector 230 and the fourth connector 240 are respectively provided with sliding grooves on the same straight line. A sliding groove on the third connector 230 and a sliding groove on the fourth connector 240 are a pair.

[0029] In the second direction, the displacement vectors L of the two pairs of sliding grooves are equal, and in a third direction that is perpendicular to both the first and second directions, the displacement vectors H of the two pairs of sliding grooves are equal.

[0030] The sliding path of the first pair of sliding grooves 201 includes an upper inclined section 201a and a horizontal section 201b. In the second direction, the ratio of the displacement vector of the upper inclined section 201a to the displacement vector of the horizontal section 201b is 7:1.

[0031] The first pair of sliding grooves 201 and the second pair of sliding grooves 202 are arranged sequentially along the second direction (the opening direction of the sub-table). The sliding path of the second pair of sliding grooves 202 includes a ramp section 202a, an arc section 202b, and a horizontal moving section 202c. In the second direction, the ratio of the displacement vector of the ramp section 202a, the displacement vector of the arc section 202b, and the displacement vector of the horizontal moving section 202c is 1:1:5.

[0032] For ease of understanding, in Figure 4 The sections are divided using dashed lines. During actual unfolding, the second pair of sliding grooves 202 are the active grooves, and the first pair of sliding grooves 201 are the driven grooves. Through precise calculations and simulation experiments, this embodiment demonstrates that the sliding path design with the aforementioned proportions allows the heavier sub-tabletop 300 to move smoothly along the sliding path. This embodiment utilizes the ramp section 202a and the arc section 202b to cause the sub-tabletop 300 to tilt upwards during opening, preventing it from colliding with the frame of the sliding frame 200. No other auxiliary installation components are needed to control the tilting angle, resulting in a simple structure.

[0033] Please see Figure 5 In this embodiment, the sliding frame 200 and the main table 100 are slidably connected by two sets of three-section rails 400. The two sets of three-section rails 400 are symmetrically arranged along the center line of the main table 100, and the center line is perpendicular to the second direction. Each set of three-section rails 400 includes a first sliding rail 410, a second sliding rail 420 and a third sliding rail 430 that are slidably connected in sequence. The two first sliding rails 410 are respectively fixedly connected to the main table 100. One third sliding rail 430 constitutes a first connecting member 210 and another third sliding rail 430 constitutes a second connecting member 220.

[0034] The 400-section three-rail design can accommodate different shapes of rocker arm flip-up extension table designs and is compatible with different shapes of rocker arm flip-up extension table legs.

[0035] In some other embodiments, a two-section rail sliding connection may be used.

[0036] Please see Figure 1 , Figure 2 and Figure 5 The secondary table 300 is installed in the frame of the sliding frame 200. That is, the secondary table 300 slides along the first direction with the sliding frame 200. When the sliding frame 200 is exposed in the main table 100, the secondary table 300 is also exposed in the main table 100. Therefore, in this embodiment, the extension is on one side of the main table 100.

[0037] In some other embodiments, a secondary tabletop 300 can be provided on each side of the main tabletop 100, thereby extending the length on both sides.

[0038] In some embodiments, the main tabletop 100 is divided into two table bodies, with a secondary tabletop 300 positioned between them. The two table bodies can be pulled apart, and the secondary tabletop 300 can be flipped up to extend the table. When folded up, the two table bodies are closed, with the secondary tabletop 300 located beneath them.

[0039] In this embodiment, the first direction can be set as the length direction of the main table 100, and the secondary table 300 is an extension of the main table 100 in the length direction, which extends the length of the rocker arm flip-up extension table and increases the usable area of ​​the rocker arm flip-up extension table.

[0040] The side of the secondary table 300 away from the main table 100 is provided with a sliding shaft 330. The number of sliding shafts 330 is the same as the number of sliding grooves and they correspond one-to-one. The two ends of a sliding shaft 330 are respectively placed in the same pair of sliding grooves.

[0041] This embodiment adopts a double-slide design, that is, there are two sliding shafts 330. The first sliding shaft is located in the first pair of sliding grooves 201, and the second sliding shaft is located in the second pair of sliding grooves 202. The first sliding shaft is the active sliding shaft (i.e., the main sliding), and the second sliding shaft is the driven sliding shaft (i.e., the auxiliary sliding). Compared with related technologies that only set one sliding shaft, this embodiment can improve the smoothness of sliding.

[0042] This embodiment utilizes the cooperation of double sliding grooves and double sliding shafts to guide the movement of the sub-table 300, allowing it to slide and tilt smoothly, simplifying operation. It is understood that the sliding paths of the two pairs of sliding grooves designed in this embodiment are different. Compared to related technologies that use an extension plate guided by a single sliding groove, this embodiment increases the number of sliding shafts 330, which is equivalent to increasing the sliding fulcrum, thereby improving the ease of movement of the sub-table 300.

[0043] In addition, in this embodiment, the components below the sub-table 300 are simplified, reducing the space occupied by the components, providing space for the installation of table legs, and enabling it to adapt to different types of table legs, improving the flexibility of the design and meeting different adaptation scenarios.

[0044] In some embodiments, there are two sub-tables 300, each including a first sub-table 310 and a second sub-table 320. A sliding shaft 330 is disposed on the side of the first sub-table 310 away from the main table 100. In this embodiment, the two sliding shafts 330 serve as supports for the first sub-table 310, improving the stability of the first sub-table 310 after it is opened. At the same time, this embodiment does not require additional support design, which has the advantage of simplified structure and reduced production and assembly processes.

[0045] The second sub-tabletop 320 is hinged to the first sub-tabletop 310 and folded over the side of the first sub-tabletop 310 closest to the main tabletop 100. In this embodiment, the first sub-tabletop 310 and the second sub-tabletop 320 are the same size, and the first sub-tabletop 310 and the second sub-tabletop 320 are hinged together by hinges 340, with multiple hinges 340 spaced apart along the length of the sub-tabletop 300.

[0046] Please see Figure 3 , Figure 5 and Figure 6 The secondary table 300 also includes a support shaft 350 and a connector 360. One end of the connector 360 is rotatably connected to the support shaft 350, and the other end of the connector 360 is rotatably connected to the second secondary table 320. The second secondary table 320 is opened and the sliding shafts 330 are driven to slide.

[0047] As mentioned above, applying force to the second tabletop 320 achieves linkage, which involves the second tabletop 320 opening relative to the first tabletop 310, and the first tabletop 310 sliding relative to the sliding frame 200 in a second direction.

[0048] After the rocker arm flip-up extension table is opened, in the first direction, the length of the second tabletop 320 is equal to the length of the first tabletop 310, and the extension length is equal to the length of the second tabletop 320 and the first tabletop 310. At this time, the total length of the rocker arm flip-up extension table is the sum of the length of the main tabletop 100 and the extension length.

[0049] After the rocker arm flip-up extension table is opened, in the second direction, the width of the second tabletop 320 is equal to the width of the first tabletop 310, the extension width is equal to the sum of the width of the second tabletop 320 and the width of the first tabletop 310, and the extension width is also equal to the width of the main tabletop 100.

[0050] Push and open the secondary table 300 along a second direction perpendicular to the first direction. The sliding shaft 330 slides in the sliding groove. When it slides into place, the table surface of the secondary table 300 and the table surface of the main table 100 are on the same horizontal plane.

[0051] Specifically, in the folded state, the surface of the second tabletop 320 is in contact with the surface of the first tabletop 310. When the second tabletop 320 is unfolded, the surface of the second tabletop 320 and the surface of the first tabletop 310 gradually move away from each other until they are on the same horizontal plane. The connection position of the hinge 340 is the adjacent position of the first tabletop 310 and the second tabletop 320.

[0052] In some embodiments, the rocker arm flip-up extension table further includes a first leveling member 500 and a second leveling member 600, both of which are capable of adjusting their height along their axial direction.

[0053] The first leveling component 500 and the second leveling component 600 are located on the side of the sub-table 300 away from the main table 100. When slid into place, the first leveling component 500 is located between the sub-table 300 and the first connecting component 210, and the second leveling component 600 is located between the sub-table 300 and the second connecting component 220.

[0054] Specifically, the first leveling component 500 is located between the first sub-tabletop 310 and the first connecting component 210, and the second leveling component 600 is located between the second sub-tabletop 320 and the second connecting component 220. That is, the first leveling component 500 has the function of adjusting the height of the tabletop of the first sub-tabletop 310, and the second leveling component 600 has the function of adjusting the height of the tabletop of the second sub-tabletop 320.

[0055] This embodiment, through the setting of the first leveling component 500 and the second leveling component 600, enables the adjustment of the tabletop height after the rocker arm flip-up extension table is installed, ensuring that the first auxiliary tabletop 310, the second auxiliary tabletop 320 and the main tabletop 100 are on the same horizontal plane, reducing the manufacturing and installation accuracy requirements and saving costs.

[0056] In practical application, the first leveling component 500 and the second leveling component 600 are respectively connected to the side of the auxiliary table plate 300 away from the main table plate 100 by bolts. By adjusting the connection length between the bolts and the auxiliary table plate 300, the height of the first leveling component 500 and the second leveling component 600 can be adjusted.

[0057] The height here refers to the relative position between the first leveling component 500 and the sub-table 300, and the relative position between the second leveling component 600 and the sub-table 300. The sub-table 300 has a first mounting hole and a second mounting hole. The first leveling component 500 is placed in the first mounting hole, and the second leveling component 600 is placed in the second mounting hole.

[0058] Please see Figures 3 to 5 Along the second direction, the sliding shaft 330 slides relative to the sliding groove between the initial position and the final position. At the final position, the size of the sliding groove is larger than the size of the sliding shaft 330. At positions other than the final position, the sliding groove and the sliding shaft 330 are in clearance fit.

[0059] As mentioned above, at the termination position, the size of the sliding groove is designed to be larger than the size of the sliding shaft 330. This means that when the sliding shaft 330 is in the termination position, the sliding shaft 330 can move up and down in the sliding groove, thereby adapting to the first leveling component 500 and the second leveling component 600 of different heights, reserving sufficient adjustment space to ensure that the table surface of the rocker arm flip-board extension table is flat.

[0060] Based on the above, this embodiment further explains the working principle of the rocker arm flip-up extension table as follows: like Figure 1 The image shows the folded state of the rocker arm flip-up extension table. Figure 7 The secondary tabletop 300 shown is completely concealed beneath the main tabletop 100. S100. Push the sliding frame 200 along the first direction, so that the sliding frame 200 and the secondary tabletop 300 are fully exposed above the main tabletop 100. (See also...) Figure 8 .

[0061] S200. Flip the second tabletop 320 upwards. As the second tabletop 320 flips up relative to the first tabletop 310, the first tabletop 310 slides relative to the sliding frame 200 in the second direction.

[0062] Please see Figure 9 When the slides into place, the first auxiliary table 310, the second auxiliary table 320 and the main table 100 are on the same horizontal plane.

[0063] This embodiment achieves two states for the secondary tabletop 300: concealed within the main tabletop 100 and exposed within it, by installing the secondary tabletop 300 within the sliding frame 200, which is slidably connected to the main tabletop 100. Furthermore, this embodiment utilizes two pairs of sliding grooves and two sliding shafts 330 to simultaneously achieve sliding and tilting, simplifying the unfolding or folding process and reducing operational difficulty. The rocker arm flip-up extension table provided in this embodiment has a sliding and flipping structure, meeting the functional requirements of various table types for the secondary tabletop 300, such as: single-sided extension structure, central linkage single-sided extension structure, and central extension structure.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A rocker flap extension table characterized by, include: Main table; The sliding frame slides relative to the main tabletop in a first direction to a first position and a second position. In the first position, the sliding frame is hidden under the main tabletop, and in the second position, the sliding frame is exposed on the main tabletop. The sliding frame is provided with at least two pairs of sliding grooves, and the sliding groove in each pair extends along the first direction. A secondary table is installed within the frame of a sliding frame, and a sliding shaft is provided on the side of the secondary table away from the main table. The number of sliding shafts is the same as the number of pairs of sliding grooves and they correspond one-to-one. The two ends of a single sliding shaft are respectively placed in the same pair of sliding grooves. The secondary table is pushed and opened along a second direction perpendicular to the first direction. The sliding shaft slides within the sliding groove. When the sliding shaft is in place, the surface of the secondary table is on the same horizontal plane as the surface of the main table.

2. The swing arm flap extension table of claim 1, wherein, The sliding frame is rectangular and includes a first connector, a second connector, a third connector, and a fourth connector. The first connector and the second connector are arranged parallel to each other, and the third connector and the fourth connector are arranged parallel to each other. The third connector is perpendicularly adjacent to the first connector. The third connector and the fourth connector are respectively provided with sliding grooves on the same straight line. A sliding groove on the third connector and a sliding groove on the fourth connector are a pair.

3. The swing arm flap extension table of claim 2, wherein, In the second direction, the displacement vectors of the two pairs of sliding grooves are equal, and in a third direction that is simultaneously perpendicular to the first direction and the second direction, the displacement vectors of the two pairs of sliding grooves are equal.

4. The swing arm flap extension table of claim 3, wherein, The sliding path of the first pair of sliding grooves includes an upper inclined section and a horizontal section. In the second direction, the ratio of the displacement vector of the upper inclined section to the displacement vector of the horizontal section is 7:

1.

5. The swing arm flap extension table of claim 4, wherein, The first pair of sliding grooves and the second pair of sliding grooves are arranged sequentially along the second direction. The sliding path of the second pair of sliding grooves includes a ramp section, an arc section and a horizontal movement section. In the second direction, the ratio of the displacement vector of the ramp section, the displacement vector of the arc section and the displacement vector of the horizontal movement section is 1:1:

5.

6. The swing arm flap extension table of any one of claims 2 to 5, wherein, The sliding frame and the main tabletop are slidably connected by two sets of three-section rails. The two sets of three-section rails are symmetrically arranged along the center line of the main tabletop, and the center line is perpendicular to the second direction. Each set of three-section rails includes a first sliding rail, a second sliding rail, and a third sliding rail that are slidably connected in sequence. The two first sliding rails are respectively fixedly connected to the main tabletop. One third sliding rail constitutes the first connecting member, and one third sliding rail constitutes the second connecting member.

7. The swing arm flap extension table of any one of claims 2 to 5, wherein, It also includes a first leveling component and a second leveling component. The first leveling component and the second leveling component are disposed on the side of the sub-table away from the main table. When slid into place, the first leveling component is located between the sub-table and the first connecting component, and the second leveling component is located between the sub-table and the second connecting component.

8. The swing arm flap extension table of claim 7, wherein, Along the second direction, the sliding shaft slides relative to the sliding groove between an initial position and a final position. At the final position, the size of the sliding groove is larger than the size of the sliding shaft. Outside the final position, the sliding groove and the sliding shaft are in clearance fit.

9. The swing arm flap extension table of any one of claims 1 to 5, wherein, The secondary table includes a first secondary table and a second secondary table. The sliding shaft is located on the side of the first secondary table away from the main table. The second secondary table is hinged to the first secondary table and folded onto the side of the first secondary table closer to the main table.

10. The swing arm flap extension table of claim 9, wherein, The sub-table also includes a support shaft and a connector. One end of the connector is rotatably connected to the support shaft, and the other end of the connector is rotatably connected to the second sub-table. The second sub-table is flipped open, which causes each of the sliding shafts to slide.

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