A desktop expandable table

Abstract

A kind of desktop expandable table, it includes first guide rail and second guide rail of symmetrical distribution front and back, the bottom of first guide rail and second guide rail is provided with several cross beams, the bottom of cross beam is equipped with support part;It also includes first tabletop and second tabletop of opposite installation, the bottom of first tabletop and second tabletop is equipped with first sliding frame and second sliding frame respectively, first sliding frame and second sliding frame are slidably installed in first guide rail and second guide rail in front and back two sides, so that first tabletop and second tabletop can be moved relative to first guide rail and second guide rail;It also includes lifting tabletop installed between first tabletop and second tabletop.The beneficial effects of the utility model are: the utility model discards the linkage mechanism of complex connecting rod, gear or cam etc. in prior art, and innovatively uses the direct sliding cooperation mode of guide column and 7-shaped guide groove to realize the lifting and support of lifting tabletop.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, specifically to a table with an expandable desktop. Background Technology

[0002] With the changing living spaces and social needs of modern people, multifunctional furniture is increasingly favored by the market. Among them, tables with expandable tabletops can flexibly adjust their size according to the number of users or the occasion, combining the convenience of daily use with the practicality of entertaining guests, and are therefore widely used.

[0003] A typical expandable desktop usually consists of two main desktop panels that can be positioned close together or far apart, and one or more extended desktop panels hidden beneath the main desktop panels. When the desktop needs to be expanded, the user pulls the two main desktop panels apart, then removes and lays out the hidden extended desktop panels to increase the overall desktop area.

[0004] To enhance user experience and automation, some cleverly designed expandable desks have optimized the raising and lowering process of the central extended desktop. In these existing technologies, when the main desktops on both sides are pulled outwards, a preset linkage mechanism automatically raises the hidden lower desktop below to the same height as the main desktops.

[0005] However, the inventor of this utility model has discovered through research that the technical solution employing this linkage mechanism has the following significant drawbacks:

[0006] 1. To achieve synchronous lifting, translation, and precise positioning of the lifting tabletop during the unfolding of the two side tables, this linkage mechanism typically requires the integration of multiple precision components such as linkages, gears, springs, sliders, or cams. These components require complex motion transmission and coordination, which not only presents a significant design challenge but also directly leads to a decrease in the overall reliability of the mechanism due to the excessive number of motion nodes and mating parts. After prolonged use, wear, loosening, or lubrication failure of components can easily cause movement jamming, inaccurate positioning, or even complete mechanism failure.

[0007] 2. The numerous precision components in the linkage mechanism require extremely high standards in terms of materials and machining accuracy, which undoubtedly increases the manufacturing cost of individual parts. At the same time, the complex structure leads to a cumbersome and time-consuming assembly process, requiring skilled workers to perform precise adjustments, further increasing the total production cost of the product and limiting its market competitiveness.

[0008] 3. Once the aforementioned complex linkage mechanism malfunctions, troubleshooting and repair become extremely difficult. Because the mechanism is typically compactly installed inside the table, it is virtually impossible for non-professionals to repair it themselves. Even factory repairs often require significant disassembly of the table, resulting in lengthy repair cycles and high costs. This high maintenance cost and the resulting inconvenience severely impact the long-term user experience, thus necessitating further improvements. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a desktop expandable table that is simple in structure, easy to use, effectively simplifies the expansion and height adjustment of the desktop, reduces production costs, and improves the durability and maintainability of the product while ensuring functionality.

[0010] The purpose of this utility model is achieved by the following means: a table with an expandable desktop, which includes a first guide rail and a second guide rail symmetrically distributed front and back, a number of crossbeams are provided at the bottom of the first guide rail and the second guide rail, and a support part is installed at the bottom of the crossbeams, and the support part supports the crossbeams on the ground.

[0011] It also includes a first desktop and a second desktop installed opposite to each other. The bottom of the first desktop and the second desktop are respectively equipped with a first sliding frame and a second sliding frame. The first sliding frame and the second sliding frame are slidably installed in the first guide rail and the second guide rail on the front and rear sides, so that the first desktop and the second desktop can move relative to the first guide rail and the second guide rail.

[0012] It also includes a liftable desktop installed between the first desktop and the second desktop, wherein a liftable frame is installed at the bottom of the liftable desktop and the liftable frame is located between the first guide rail and the second guide rail;

[0013] The lifting frame is provided with several guide columns, and correspondingly, several guide grooves are provided on the first guide rail and the second guide rail. The guide columns extend into the guide grooves and slide to adjust the height of the lifting frame.

[0014] Furthermore: the support part includes a support base and support legs. There is one support base located on one side of the first guide rail and the second guide rail. There are two support legs located on the other side of the first guide rail and the second guide rail, and they are symmetrically distributed front and back.

[0015] Furthermore, the support base is a multi-faceted prism shape, smaller at the top and larger at the bottom.

[0016] Furthermore, the top of the support base is connected to the first guide rail and the second guide rail via at least two crossbeams.

[0017] Furthermore, the top of the support leg is provided with a connecting seat, which is connected to the first guide rail or the second guide rail.

[0018] Furthermore, the guide groove includes a vertically distributed lifting groove and a horizontally extending bearing groove located on its top, with the lifting groove and the bearing groove arranged in a "U" shape.

[0019] Furthermore, a locking groove is also provided vertically downward within the bearing groove.

[0020] The beneficial effects of this utility model are: 1. The structure is extremely simple and the operation is stable and reliable.

[0021] This invention abandons the complex linkage mechanisms such as rods, gears, or cams found in existing technologies, and innovatively adopts a direct sliding engagement between the guide column and the 7-shaped guide groove to achieve the lifting and support of the adjustable tabletop. This design greatly simplifies the overall structure, reduces the number of moving parts, and fundamentally reduces the risk of operational jamming or malfunction due to component wear or misalignment. This makes the table's expansion and storage process smoother, and significantly improves operational stability and long-term reliability.

[0022] Because the core lifting structure is simplified to guide columns and guide grooves, its manufacturing and assembly become exceptionally simple. The significant increase in production efficiency and the substantial reduction in manufacturing costs give the product a much stronger competitive edge in the market.

[0023] When operating the device, users simply need to manually pull apart the two sides of the desktop and then lift the lifting desktop. The guide column will then rise along the lifting groove and fall into the bearing groove under the action of gravity or a slight thrust. The action is intuitive and easy to understand.

[0024] Due to its simple structure, this invention has virtually no complex failure modes. Even if problems occur, they are easy to diagnose and repair, usually requiring only inspection of the guide pillars and guide grooves. No professional personnel or special tools are needed, greatly reducing the user's subsequent maintenance costs and time costs, and improving the overall user experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the desktop of this utility model in an extended state.

[0026] Figure 2 This is a schematic diagram of the desktop of this utility model in the storage state.

[0027] Figure 3 , 4 This is an exploded view of the structure of this utility model.

[0028] Figure 5 In this utility model Figure 4 Enlarged view of a local structure.

[0029] Figure 6 This is an exploded view of the lifting frame, the first guide rail, and the second guide rail in this utility model.

[0030] Figure 7 In this utility model Figure 6 Enlarged view of the structure of part A.

[0031] Figure 8 This is a schematic diagram of the first embodiment of the guide groove in this utility model.

[0032] Figure 9 This is a schematic diagram of the second embodiment of the guide groove in this utility model. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings. A table with an expandable desktop includes a first guide rail 1 and a second guide rail 2 symmetrically distributed front and back. Several crossbeams 3 are provided at the bottom of the first guide rail 1 and the second guide rail 2. A support part is installed at the bottom of the crossbeams 3, and the support part supports the crossbeams 3 on the ground.

[0034] It also includes a first desktop 4 and a second desktop 5 installed opposite to each other. The bottom of the first desktop 4 and the second desktop 5 are respectively equipped with a first sliding frame 41 and a second sliding frame 51. The first sliding frame 41 and the second sliding frame 51 are slidably installed in the first guide rail 1 and the second guide rail 2 on the front and rear sides, so that the first desktop 4 and the second desktop 5 can move relative to the first guide rail 1 and the second guide rail 2.

[0035] It also includes a lifting desktop 6 installed between the first desktop 4 and the second desktop 5. The lifting desktop 6 has a lifting frame 61 installed at its bottom, and the lifting frame 61 is located between the first guide rail 1 and the second guide rail 2.

[0036] The lifting frame 61 is provided with a number of guide columns 62. Correspondingly, the first guide rail 1 and the second guide rail 2 are provided with a number of guide grooves 7. The guide columns 62 extend into the guide grooves 7 and slide to adjust the height of the lifting frame 61.

[0037] In this embodiment: the first and second guide rails are connected by a crossbeam to form a stable parallel track frame, and are stably supported on the ground by a support unit, forming the "keel" of the entire table.

[0038] The first and second desktops are connected to the guide rail via sliding brackets at their bottoms. When the desktop needs to be extended, the user can pull the first and second desktops outwards, and the sliding brackets will slide smoothly outwards along the guide rails, thus creating a space between them to accommodate the height-adjustable desktop.

[0039] The centrally located lifting tabletop 6 forms a kinematic pair with the guide post 62 on its lifting frame 61 and the guide groove 7 on the guide rail. The guide post 62 can slide within the trajectory defined by the guide groove 7, thereby realizing the vertical height change of the lifting frame 61 and the lifting tabletop 6. This provides basic guidance and constraints for the subsequent "lift-translation-locking" action.

[0040] Compared to traditional technologies, this embodiment features a simplified, non-linkage-based extended lifting platform. It decouples the two core functions of "left and right extension" and "center lifting" of the desktop, achieving them through two independent sliding mechanisms.

[0041] In one embodiment: the support part includes a support base 8 and a support leg 9. There is one support base 8, located on one side of the first guide rail 1 and the second guide rail 2. There are two support legs 9, located on the other side of the first guide rail 1 and the second guide rail 2, and they are symmetrically distributed front and back.

[0042] In this embodiment, an asymmetrical support structure is used to simultaneously meet stability and specific space requirements. One side employs a single, large-volume support base 8 to provide strong primary support and anti-overturning moment; the other side uses two separate support legs 9 to provide auxiliary, symmetrical support points to ensure the balance and stability of the entire table frame.

[0043] In one embodiment, the support base 8 is a multi-diameter prism with a smaller top and a larger bottom.

[0044] This embodiment utilizes basic physical principles of stability. The "larger at the bottom" design allows the support base 8 to have a wider bottom contact area and a lower center of gravity, while the "smaller at the top" design saves material and leaves room for space under the tabletop. The multi-faceted prismatic shape, through the combination of multiple planes, appears visually modern and simple. At the same time, the structure of being smaller at the top and larger at the bottom significantly improves the table's resistance to tipping over, making it very stable. In addition, the multi-faceted prismatic design is simple, elegant, and modern; compared to traditional square prisms, its corner transitions are also smoother, preventing accidental bumps and knocks.

[0045] In one embodiment, the top of the support base 8 is connected to the first guide rail 1 and the second guide rail 2 via at least two crossbeams 3.

[0046] In this embodiment, the load from the upper frame is effectively distributed and transferred to the support 8 through multiple connections. This forms a stable force transmission path and prevents stress concentration at the connection points.

[0047] This enhances the overall rigidity and torsional resistance of the table frame. Meanwhile, the connection via multiple crossbeams ensures an extremely secure link between the guide rail and support base 8, preventing frame deformation even under uneven stress on the tabletop and guaranteeing smooth operation of the sliding components.

[0048] In one embodiment, the top of the support leg 9 is provided with a connecting seat 91, which is connected to the first guide rail 1 or the second guide rail 2.

[0049] In this embodiment, the front support leg 9 is connected to one of the guide rails via its connecting seat 91, and the rear support leg 9 is connected to the other guide rail via its connecting seat 91, thus forming a stable support structure spanning between the two guide rails. The connecting seat 91 serves as a standardized connection interface, simplifying assembly.

[0050] In this embodiment, the stability of one side of the table is ensured. Using connector 91 as an intermediate component makes the connection more standardized and convenient, reducing the difficulty of installation.

[0051] like Figure 8 As shown, in one embodiment, the guide groove 7 includes a vertically distributed lifting groove 71 and a horizontally extending bearing groove 72 disposed on its top, with the lifting groove 71 and the bearing groove 72 arranged in a "7" shape.

[0052] In this embodiment, the lifting desktop is divided into two stages of movement.

[0053] Lifting and lowering phase: When the user lifts the lifting tabletop 6 upwards, its guide column 62 is guided within the vertical lifting groove 71, allowing it to move purely vertically upwards until it reaches the top.

[0054] Supporting Phase: Once the guide column 62 reaches the top of the lifting slot 71, the user applies a slight horizontal push to the lifting tabletop 6, causing the guide column 62 to slide into the horizontal support slot 72. At this point, the guide column 62 is firmly supported by the lower edge of the support slot 72, and the lifting tabletop 6 is stably maintained at the same height as the main tabletop, without the need for any additional locking devices.

[0055] Compared to traditional technologies, this embodiment uses a simple "7"-shaped groove to completely replace the complex linkage mechanism in the prior art, resulting in an extremely simple structure. Furthermore, without any complex transmission pairs, it only involves column-groove sliding, leading to an extremely low failure rate and high durability.

[0056] like Figure 9 As shown, a locking groove 73 is also provided vertically downward within the bearing groove 72.

[0057] Compared to the previous implementation, this example adds a locking function to the support function. Its working principle is as follows: when the guide post 62 slides into the support groove 72, due to gravity, it will naturally fall into the vertically downward locking groove 73. Once in place, the guide post 62 is horizontally restricted, preventing it from accidentally sliding out of the support groove 72. This greatly enhances safety. This simple locking groove 73 forms a secondary lock, effectively preventing the risk of the lifting tabletop 6 accidentally shifting horizontally when the table is accidentally shaken or pushed, causing it to detach from the support groove 72 and suddenly fall, giving users greater peace of mind.

[0058] The specific working principle is as follows: Figure 1 As shown, in the case of this table, when the tabletop is in its stowed state, the first tabletop 4 and the second tabletop 5 are close together, while the lifting tabletop 6 is lowered and hidden beneath them. Its guide post 62 is located at the bottom of the lifting groove 71 in the "7"-shaped guide groove 7. The entire table is stably supported by a support base 8 at one end (smaller at the top and larger at the bottom) and two support legs 9 at the other end.

[0059] When the desktop needs to be expanded, the user simply pulls the first desktop 4 and the second desktop 5 to the sides. The sliding brackets at the bottom of them will slide smoothly along the guide rails that serve as the main frame, thus exposing the lower lifting desktop 6 in the middle.

[0060] Then, the user lifts the lifting tabletop 6 upwards. Its bottom guide column 62 rises vertically to the top along the lifting groove 71 on the guide rail.

[0061] Then, the user gently pushes the lifting tabletop 6, or under the action of gravity, the guide post 62 slides horizontally into the bearing groove 72. Immediately afterwards, the guide post 62 falls into the locking groove 73 within the bearing groove 72 under the action of gravity and is firmly locked in place.

[0062] Thus, the lifting tabletop 6, guided by the lifting groove, supported by the bearing groove, and locked by the locking groove, is steadily raised and fixed at a height flush with the side tabletops through a series of ingenious purely mechanical structural actions, completing the entire expansion process. The entire process requires no complex linkage mechanisms, is intuitive to operate, and has a reliable structure, greatly improving the product's practicality and reliability while reducing costs, thus allowing for widespread use.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A table with an expandable desktop, characterized in that: It includes a first guide rail (1) and a second guide rail (2) symmetrically distributed front and back. Several crossbeams (3) are provided at the bottom of the first guide rail (1) and the second guide rail (2). A support part is installed at the bottom of the crossbeam (3), and the support part supports the crossbeam (3) on the ground. It also includes a first desktop (4) and a second desktop (5) installed opposite to each other. The bottom of the first desktop (4) and the second desktop (5) are respectively equipped with a first sliding frame (41) and a second sliding frame (51). The first sliding frame (41) and the second sliding frame (51) are slidably installed in the first guide rail (1) and the second guide rail (2) on the front and rear sides, so that the first desktop (4) and the second desktop (5) can move relative to the first guide rail (1) and the second guide rail (2). It also includes a lifting tabletop (6) installed between the first tabletop (4) and the second tabletop (5), wherein a lifting frame (61) is installed at the bottom of the lifting tabletop (6), and the lifting frame (61) is located between the first guide rail (1) and the second guide rail (2); The lifting frame (61) is provided with several guide columns (62). Correspondingly, several guide grooves (7) are provided on the first guide rail (1) and the second guide rail (2). The guide columns (62) extend into the guide grooves (7) and slide to adjust the height of the lifting frame (61).

2. The desktop expandable table according to claim 1, characterized in that: The support includes a support base (8) and support legs (9). There is one support base (8) located on one side of the first guide rail (1) and the second guide rail (2). There are two support legs (9) located on the other side of the first guide rail (1) and the second guide rail (2) and they are symmetrically distributed front and back.

3. A desktop expandable table according to claim 2, characterized in that: The support base (8) is a multi-diameter prism with a smaller top and a larger bottom.

4. A desktop expandable table according to any one of claims 2 or 3, characterized in that: The top of the support base (8) is connected to the first guide rail (1) and the second guide rail (2) by at least two crossbeams (3).

5. A desktop expandable table according to claim 2, characterized in that: The top of the support leg (9) is provided with a connecting seat (91), which is connected to the first guide rail (1) or the second guide rail (2).

6. A desktop expandable table according to claim 1, characterized in that: The guide groove (7) includes a vertically distributed lifting groove (71) and a horizontally extending bearing groove (72) located on its top. The lifting groove (71) and the bearing groove (72) are distributed in a "7" shape.

7. A desktop expandable table according to claim 6, characterized in that: The bearing groove (72) is also provided with a locking groove (73) extending vertically downward.

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