A desktop extension table

Abstract

The utility model relates to furniture manufacturing technical field, especially a desktop extension table, the utility model discloses a main table body with fixed table board, extension table board, at least one group drive extension table board and store in the drive mechanism of the mobile between the storage position of main table body inside and the extension position adjacent to fixed table board flush, and locking mechanism, drive mechanism includes slide rail assembly, cantilever piece, at least two rotating pieces, at least two rotating pieces will cantilever piece with the way of low and high position translation be connected in slide rail assembly, locking mechanism can selectably lock cantilever piece in low or high position, and the front part of cantilever piece is fixed with extension table board, and slide rail assembly is connected to main table body, by adopting slide rail assembly, cantilever piece and at least two rotating pieces, with extension table board locking in extension position to realize the length of the desktop of extension fixed table board, so as to form the overall big desktop of adjacent flush.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing technology, and in particular to a desktop extension table. Background Technology

[0002] With the diversification of modern lifestyles and work styles, people have placed higher demands on the functionality, flexibility, and spatial adaptability of furniture, especially tables. In different settings such as homes, offices, schools, and public spaces, tables, as one of the most basic and frequently used pieces of furniture, need to be designed not only to meet basic load-bearing and usage requirements, but also to adapt to constantly changing spatial layouts and the number of users.

[0003] Traditional fixed tables typically consist of a fixed-size tabletop and supporting structure (such as legs, frame, or side support panels). The tabletop length is permanently determined after manufacturing and cannot be adjusted to suit actual usage needs. This non-adjustable length limits their usability. For example, during family meals, a fixed-size table may not be able to accommodate more people if unexpected guests arrive; conversely, an excessively large tabletop may take up too much space for everyday use.

[0004] Of course, there are many solutions to the problem of the desktop length remaining unchanged in existing technologies. For example, a common approach is to connect a side tabletop with a hinge or add a pull-out tabletop. The advantage of the hinged design is that the side tabletop can be folded flat with the original desktop to form a large, integrated desktop. However, the user needs to manually unlock the hinge, which can easily pinch fingers. Moreover, as the core rotating component, the hinge is prone to metal fatigue from frequent flipping, leading to decreased connection strength and even hinge breakage or desktop sagging, thus rendering the table's expandability ineffective. While pull-out tabletops are easier to pull out and push back than hinged ones, they cannot form a flat desktop after being pulled out, making them unsuitable for scenarios requiring a high degree of desktop flatness.

[0005] Therefore, there is an urgent need for a table that is not easily damaged and can be extended to a flat surface to improve space utilization and accommodate different usage scenarios. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a desktop extension table, which solves the technical problem that the existing desktop extension table cannot simultaneously ensure that it is not easily damaged and can be extended to create a flat and large desktop.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] This utility model provides a desktop extension table, including a main table body with a fixed tabletop, an extension tabletop, at least one drive mechanism for moving the extension tabletop between a recessed position inside the main table body and an extension position adjacent and flush with the fixed tabletop, and a locking mechanism. The drive mechanism includes a slide rail assembly, a cantilever member, and at least two rotating members. The at least two rotating members connect the cantilever member to the slide rail assembly in a translational manner between a low position and a high position. The locking mechanism can selectively lock the cantilever member in either the low or high position. The front part of the cantilever member is fixed to the extension tabletop. The slide rail assembly is connected to the main table body and can drive the cantilever member in the low position and the extension tabletop in the low position to extend and retract relative to the main table body. When the extension tabletop extends relative to the main table body and is in the high position, the extension tabletop is in the extension position.

[0011] Preferably, in the drive mechanism: at least two of the rotating members are arranged in a parallel and inclined state along the extension direction of the extended table, the first end of the rotating member is rotatably connected to the slide rail assembly, the second end of the rotating member is rotatably connected to the cantilever member, and the cantilever member is in a horizontal state in both the low and high positions; the inclination angle of the rotating member is in the range of 0°-30°.

[0012] Preferably, the locking mechanism includes a driving end, a locking end, and a transmission assembly. Each driving mechanism is matched with at least one locking end. The locking end is movably connected to the second end of the rotating member in a direction perpendicular to the cantilever member. The slide rail assembly is provided with a low-position locking hole and a high-position locking hole. The positions of the low-position locking hole and the high-position locking hole are on the arc trajectory of the locking end with the rotational connection point between the first end of the rotating member and the slide rail assembly as the center. The driving end drives the locking end to selectively engage with the low-position locking hole or the high-position locking hole via the transmission assembly, so as to selectively lock the cantilever member in a low position or a high position.

[0013] Preferably, two sets of drive mechanisms are provided, which are fixed to the left and right sides inside the main table body, respectively.

[0014] Preferably, the locking mechanism further includes a fixed cylinder, which is vertically connected to the opposing walls of the two cantilever members; the transmission assembly includes a connecting rod, an elastic element, and a fixing ring; the locking end, the connecting rod, and the driving end are connected in sequence, the locking end is located at the end of the fixed cylinder, and the locking end can pass through its corresponding cantilever member and be inserted into the low-position locking hole or the high-position locking hole to lock the extended tabletop in a low or high position; the outer wall of the fixed cylinder is provided with a movable hole, and the driving end can be movably placed in the movable hole along the axis of the fixed cylinder; the fixing ring is sleeved. The connecting rod is mounted on the connecting rod, and the outer wall of the fixing ring is fixedly connected to the inner wall of the fixing cylinder to guide the movement trajectory of the connecting rod. The elastic element is sleeved on the connecting rod, and both ends of the elastic element abut or are fixedly connected to the locking end and the fixing ring respectively to provide a rebound force for the locking end. Pulling or releasing the driving end can drive the connecting rod and the locking end to move simultaneously toward the direction away from or toward the slide rail assembly and along the axis of the fixing cylinder, so that the locking end disengages from or is inserted into the low-position locking hole or the high-position locking hole to unlock or lock the extended table.

[0015] Preferably, the extended tabletop includes a horizontal plate and a vertical plate connected in an L-shape. When the extended tabletop is in a low position or a high position, the horizontal plate is horizontal. The vertical plate is connected to the front end of the horizontal plate and extends vertically downward. The front part of the cantilever is fixedly connected to the vertical plate via a front bracket and / or fixedly connected to the horizontal plate via an upper bracket. Alternatively, the extended tabletop is a horizontal plate. When the extended tabletop is in a low position or a high position, the horizontal plate is horizontal. The front part of the cantilever is fixedly connected to the horizontal plate via an upper bracket.

[0016] Preferably, the cantilever component is a long strip plate structure; the first end and the second end of the rotating component are both circular plates, the two circular plates are fixedly connected by a connecting plate, and the first ends of at least two of the rotating components are rotatably connected to the slide rail assembly, and the second ends of at least two of the rotating components are rotatably connected to the cantilever component.

[0017] Preferably, the slide rail assembly includes a fixed slide rail, a primary slide rail, a secondary slide rail, and a tertiary slide rail arranged sequentially from the outside to the inside; the openings of the fixed slide rail, the primary slide rail, and the secondary slide rail all face the cantilever member, and are arranged opposite to the opening of the tertiary slide rail; the fixed slide rail is fixedly installed on the inner side wall of its corresponding support plate, the primary slide rail is slidably connected to the fixed slide rail, the secondary slide rail is slidably connected to the primary slide rail, and the tertiary slide rail is slidably connected to the secondary slide rail; at least two of the rotating members are rotatably installed on the side wall of the tertiary slide rail away from the secondary slide rail via a rotating shaft, and the low-position locking hole and the high-position locking hole are both formed on the tertiary slide rail.

[0018] Preferably, the slide rail assembly further includes a plurality of balls; the top and bottom of the secondary slide rail are provided with grooves, and the plurality of balls are respectively placed in the two grooves; the outer walls of the plurality of balls in the groove at the top of the secondary slide rail are in contact with the inner wall at the top of the primary slide rail and the outer wall at the top of the tertiary slide rail, and the outer walls of the plurality of balls in the groove at the bottom of the secondary slide rail are in contact with the inner wall at the bottom of the primary slide rail and the outer wall at the bottom of the tertiary slide rail, so as to reduce the friction between the secondary slide rail and the primary and tertiary slide rails.

[0019] Preferably, the slide rail assembly further includes a limiting plate; the limiting plate is vertically arranged and is vertically fixedly connected to one end of the third-level slide rail facing the extended tabletop; the limiting plate extends toward the second-level slide rail to limit the sliding range of the third-level slide rail.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] This invention fixes the front part of the cantilever to the extended tabletop, and the cantilever is mounted on the slide rail assembly via at least two rotating parts. This allows the extended tabletop to extend into the interior of the main table body via the slide rail assembly when the extended tabletop moves from a low position to a high position. Then, through the action of at least two rotating parts, the cantilever can always be raised horizontally, so that the extended tabletop can be raised horizontally along with the cantilever. The cantilever is locked in the high position by a locking mechanism, thereby locking the extended tabletop in the extended position so that the top surface of the extended tabletop is flush with the top surface of the fixed tabletop. This extends the length of the tabletop of the extended tabletop, so as to form an adjacent flush, large tabletop. Compared to the hinged tabletops in existing technologies that are prone to failure, the extended tabletop in this invention uses cantilever and rotating components to achieve the transition between the retracted and extended positions. This makes the extended tabletop more stable when rotating through the rotating components and extending and retracting through the slide rail assembly, avoiding the failure of hinged structures due to repeated folding. It also improves the strength of the extended tabletop when transitioning between the retracted and extended positions, preventing component damage caused by metal fatigue. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the extended tabletop of the desktop extension table of the present invention when the extended tabletop is in the storage position;

[0024] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0025] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the extended tabletop of the desktop extension table of the present invention when the extended tabletop is in the extended position;

[0026] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0027] Figure 5 This is a three-dimensional structural diagram of the driving mechanism and locking mechanism of a desktop extension table according to the present invention.

[0028] Figure 6 This is a schematic diagram of the overall front view of the driving mechanism and locking mechanism of a first embodiment of the desktop extension table of the present invention.

[0029] Figure 7 This is a three-dimensional disassembly diagram of the driving mechanism and locking mechanism of a first embodiment of the desktop extension table of this utility model.

[0030] Figure 8 This is a three-dimensional disassembly diagram of the locking mechanism of a desktop extension table according to the present invention;

[0031] Figure 9 This is a three-dimensional disassembly diagram of another driving mechanism and locking mechanism of a desktop extension table according to the present invention.

[0032] Figure 10 This is a three-dimensional disassembly diagram of the driving mechanism and locking mechanism of a second embodiment of the present utility model of a desktop extension table;

[0033] Figure 11 This is a three-dimensional disassembly diagram of the driving mechanism and locking mechanism of a third embodiment of the present invention for a desktop extension table.

[0034] [Explanation of Labels in the Attached Image]

[0035] 1: Fixed tabletop; 2: Fixed plate; 3: Extended tabletop; 31: Horizontal plate; 32: Vertical plate; 4: Drive mechanism; 41: Slide rail assembly; 411: Fixed slide rail; 412: Primary slide rail; 413: Secondary slide rail; 4131: Groove; 414: Tertiary slide rail; 415: Ball bearing; 416: Limiting plate; 42: Cantilever component; 43: Rotating component; 431: Circular plate; 432: Connecting plate; 43a: First plate component; 43b: Second plate component; 5: Locking mechanism; 51: Drive end; 52: Locking end; 53: Transmission assembly; 531: Connecting rod; 532: Elastic component; 533: Fixed ring; 54: Fixed cylinder; 541: Moving hole; 6: Front bracket; 7: Upper bracket; a: Low-position locking hole; b: High-position locking hole. Detailed Implementation

[0036] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0037] Example 1

[0038] like Figures 1-4 As shown, a desktop extension table in this embodiment includes a main table body with a fixed tabletop 1, an extension tabletop 3, at least one set of drive mechanisms 4 for moving the extension tabletop 3 between a storage position inside the main table body and an extension position adjacent and flush with the fixed tabletop 1, and a locking mechanism 5.

[0039] The main table is supported on the ground, and its rear end can be mounted on a fixed plate 2. The fixed plate 2 can be a wall panel, a wooden board, etc., to form a table that is directly connected to a wall or attached to a bookcase, sideboard, or other cabinet. Alternatively, the main table can be an independent table that can stand on its own. The part of the main table connecting the fixed table plate 1 and the ground can be multiple independent table legs, side panels, or a frame, etc., with no structural limitations. However, as can be understood from the following description of the extended table plate 3 and related driving structure, the main table's use of side panels to support the fixed table plate 1 on the ground can conceal the extended table plate 3 and related driving structure located in the storage area, which is beneficial for aesthetics and tidiness.

[0040] When the extended tabletop 3 is in its extended position, its top surface is flush with the top surface of the fixed tabletop 1, forming a large, flat tabletop. Both the fixed tabletop 1 and the extended tabletop 3 are made of wood. For example... Figure 1 As shown, the length direction of the fixed tabletop 1 is front and back, i.e., the direction away from the fixed tabletop 2 is front (X), and the direction towards the fixed tabletop 2 is back. The width direction of the fixed tabletop 1 is left (Y), and the width direction is right. The height direction of the fixed tabletop 2 is up (Z), and the height direction is down.

[0041] Furthermore, such as Figure 2 , Figure 4 and Figure 5 and Figure 6 As shown, two sets of drive mechanisms 4 are set, fixed to the left and right sides of the main table body respectively. They can provide balanced support to the extended tabletop 3 on both sides, making the force on the extended tabletop 3 more even during extension, lifting, and use, avoiding problems such as tabletop tilting, center of gravity shift, or local stress concentration that may occur with unilateral support. Even when heavy objects are placed on the edge of the extended tabletop 3, the two drive mechanisms 4 can work together to bear the load, ensuring the overall stability of the tabletop and further enhancing the structure's resistance to deformation. Of course, if the drive mechanism 4 in this patent is only intended to extend the tabletop to a flush position, only one set can be set in the middle of the main table body; while if more stable support for the extended tabletop 3 is desired, three or more sets can be set side by side along the left and right directions, but this would make the internal structure of the main table body more complex. Therefore, setting only one set of drive mechanisms 4 on each side is a comprehensive consideration of stable support and structural simplicity.

[0042] Specifically, the drive mechanism 4 includes a slide rail assembly 41, a cantilever 42, and two rotating members 43. The two rotating members 43 connect the cantilever 42 to the slide rail assembly 41 in a translational manner between a low position and a high position. The locking mechanism 5 can selectively lock the cantilever 42 in either a low or high position. The front part of the cantilever 42 is fixed to the extension tabletop 3. The slide rail assembly 41 is connected to the main table body and can drive the cantilever 42, which is located in the low position, and the extension tabletop 3, which is also located in the low position, to extend and retract relative to the main table body. When the extension tabletop 3 is extended relative to the main table body and is in the high position, the extension tabletop 3 is in the extended position.

[0043] By fixing the front part of the cantilever 42 to the extended tabletop 3, and mounting the cantilever 42 on the slide rail assembly 41 via two rotating parts 43, the extended tabletop 3 can extend into the interior of the main table body via the slide rail assembly 41 when the extended tabletop 3 moves from a low position to a high position. Then, through the action of the two rotating parts 43, the cantilever 42 can always be raised horizontally, so that the extended tabletop 3 can be raised horizontally along with the cantilever 42. The cantilever 42 is locked in the high position by the locking mechanism 5, so that the extended tabletop 3 is locked in the extended position, so that the top surface of the extended tabletop 3 is flush with the top surface of the fixed tabletop 1, thereby extending the length of the tabletop of the extended fixed tabletop 1 to form an adjacent flush overall large tabletop. Furthermore, compared to the hinged tabletops in the prior art that are prone to failure, the extended tabletop 3 in this utility model achieves the conversion between the storage position and the extended position through the cantilever component 42 and the rotating component 43. This makes the extended tabletop 3 more stable when rotating through the rotating component 43 and extending and retracting through the slide rail assembly 41, avoiding the problem of hinged structures failing under repeated folding. It also improves the strength of the extended tabletop 3 when converting between the storage position and the extended position, and avoids component damage caused by metal fatigue.

[0044] Specifically, in this embodiment, in the drive mechanism 4, two rotating members 43 are arranged parallel to each other and inclined along the extension direction of the extended table 3, forming a support structure similar to a "parallelogram linkage." This allows the cantilever member 42 to translate between its low and high positions, ensuring that the cantilever member 42 is parallel to each other in its low, high, and any position in between. This, in turn, ensures that the extended table 3, fixed to the cantilever member 42, is horizontal in its low, high, and any position in between. In this embodiment, the cantilever member 42 is horizontal, and the extended table 3 is parallel to the cantilever member 42. Of course, in other embodiments, the cantilever member 42 may not be horizontal; it may form an angle with the extended table 3, but the extended table 3 must remain horizontal. The advantage of a horizontal cantilever member 42 is that it occupies less space in the height direction, thus saving space.

[0045] In this embodiment, the tilt angle of the rotating member 43 is between 0° and 30°. Specifically, when the extended tabletop 3 is in the stowed position, the angle between the rotating member 43 and the horizontal plane can be 0°. When the extended tabletop 3 is in the extended position, the rotating member 43 needs to drive the cantilever member 42 to rotate, so the angle between the rotating member 43 and the horizontal plane can be 30°. At this time, the rotating member 43 is obliquely upward in the direction of extension of the slide rail assembly 41. Conversely, when the extended tabletop 3 is in the stowed position, the angle between the rotating member 43 and the horizontal plane can be 30°. At this time, the rotating member 43 is obliquely downward in the direction of extension of the slide rail assembly 41. Since the rotating member 43 needs to drive the cantilever member 42 to a higher position, the angle between the rotating member 43 and the horizontal plane can be 0° when the extended tabletop 3 is in the extended position. Of course, for the above two situations, when the extended table 3 is in the storage position or the extended position, the angle between the rotating member 43 and the horizontal plane is 0°. In this embodiment, the rotating member 43 is not limited to having an angle of 0° with the horizontal plane. The angle between it and the horizontal plane can also be other angles. This embodiment will not elaborate on this further.

[0046] In addition, the parallelogram linkage configuration ensures that the force on each rotating component 43 is consistent and evenly distributed. Furthermore, the tilted design of the two rotating components 43 allows for a more efficient transfer of the weight of the extended tabletop 3 and the load during use to the slide rail assembly 41, avoiding localized stress concentration. Combined with the coordinated support of multiple rotating components 43, this further enhances the rigidity of the extended tabletop 3, effectively preventing minor deformations or wobbling caused by stress when the extended tabletop 3 is in its extended position. The first end of the rotating component 43 is rotatably connected to the slide rail assembly 41, and the second end is rotatably connected to the cantilever component 42. The cantilever component 42 is horizontal in both low and high positions, preventing tilting or jamming of the extended tabletop 3 during lifting, lowering, or extension. Meanwhile, the two rotating parts 43 are arranged along the extension direction, and their extension and retraction movements are coordinated with those of the slide rail assembly 41, making the entire movement of the extended table 3 from the storage position to the extended position more smooth and continuous. That is, it first extends along the slide rail and then is lifted by the rotating parts 43, which reduces the risk of interference between components and ensures that the extended table 3 can accurately reach the position adjacent to and flush with the fixed table 1, thereby improving the smoothness of operation and the accuracy of positioning.

[0047] Of course, the number of rotating parts 43 in a drive mechanism is not limited to two; three or more can be arranged along the extension direction to provide more stable support for the cantilever 42. The number of rotating parts 43 should be determined in conjunction with the length of the cantilever 42 and the length of the extended table, taking into account whether it is necessary to provide a greater number of rotating parts 43. In this embodiment, the length of the cantilever 42 is 150mm-400mm, and the length of the extended table is 150mm-300mm; two rotating parts 43 can meet the stable support requirements. The preferred material for the two rotating parts 43 is stainless steel or aluminum alloy.

[0048] Preferably, such as Figure 2 , Figure 4 and Figure 5 As shown, the cantilever component 42 is a long, plate-like structure made of stainless steel or aluminum alloy, possessing high structural rigidity and bending resistance, enabling it to more stably bear the weight of the extended tabletop 3 and the loads during use. The rotating component 43 is also a long, plate-like structure, with circular plates 431 at both its first and second ends. The two circular plates 431 are fixedly connected by a connecting plate 432, ensuring the relative position stability of the two circular plates 431 and forming a rigid whole. Furthermore, the circular plates 431 at both ends of the rotating component 43 increase the contact area with the slide rail assembly 41 and the cantilever component 42, distributing the force during rotation. Simultaneously, the rotating component 43 is symmetrically designed along its central plane perpendicular to its length, and the symmetrical design of the first and second ends, in particular, simplifies its installation.

[0049] Furthermore, such as Figure 9 As shown, the rotating part 43 at the end of the cantilever 42 away from the extended table 3 includes a first plate 43a and a second plate 43b. Both the first plate 43a and the second plate 43b include circular plates 431 at both ends and a connecting plate 432 in the middle. The first plate 43a and the second plate 43b are coaxially arranged and clamp the end of the cantilever 42 between them. A pad is provided between the first ends of the first plate 43a and the second plate 43b. The thickness of the pad is the same as the thickness of the cantilever 42. The first ends of the pad, the first plate 43a, and the second plate 43b are all circular plates 431, and the outer contours of the three are consistent, so that the cantilever 42 fits more closely with the first plate 43a and the second plate 43b when installed. The first end of the first plate 43a near the slide rail assembly 41 is rotatably mounted on the slide rail assembly 41 via a pivot. The second plate 43b is inserted into the pivot of the plate near the slide rail assembly 41 by a pin passing through the plate and the pad in sequence. The cantilever 42 is clamped between the second ends of the first plate 43a and the second plate 43b, and is also connected to the cantilever 42 via a pivot, so that the cantilever 42 can rotate.

[0050] The rotating member 43 at the end of the cantilever 42 near the extended table 3 consists of only one plate, which includes circular plates 431 at both ends and a connecting plate 432 in the middle. The first end of the plate is rotatably mounted on the slide rail assembly 41 via a pivot, and the second end of the plate is fixed in conjunction with the locking mechanism 5. The locking mechanism 5 can move as the plate rotates, thereby selectively locking the cantilever 42 in a low or high position.

[0051] Furthermore, such as Figures 7-9 As shown, there are two locking mechanisms 5, which are symmetrically arranged along the horizontal centerline of the extending table 3. Each locking mechanism 5 includes a driving end 51, a locking end 52, and a transmission assembly 53. Each of the two driving mechanisms 4 is matched with one locking end 52. Both locking ends 52 are movably connected to the second end of the plate near one end of the extending table 3 in a direction perpendicular to the cantilever member 42, and the two locking ends 52 can move towards or away from each other. The two sets of slide rail assemblies 41 are respectively provided with a low-position locking hole a and a high-position locking hole b. The positions of the low-position locking hole a and the high-position locking hole b are on the arc trajectory centered on the first end of the plate near the end of the locking end 52 close to the extension table 3 and the rotation connection point of the slide rail assembly 41. This ensures that the locking end 52 is perfectly matched with the trajectory of the locking end 52 as it moves with the rotating part 43. This ensures that when the cantilever part 42 is in the low or high position, the locking end 52 can be precisely aligned with the corresponding low-position locking hole a or high-position locking hole b, making the insertion of the locking end 52 smoother and avoiding locking failure or jamming due to position deviation. This significantly improves the reliability of the locking mechanism 5 and ensures that the extension table 3 can be securely locked in both storage and use states. The drive end 51 drives the locking end 52 via the transmission assembly 53 to selectively engage with either the low-position locking hole a or the high-position locking hole b, thereby selectively locking the cantilever component 42 in either the low or high position. This allows the user to simultaneously drive both drive ends 51, which in turn drives both locking ends 52 via the two sets of transmission assemblies 53 to engage with either the low-position locking hole a or the high-position locking hole b on the two sets of slide rail assemblies 41. This ensures that the cantilever component 42 and the extended tabletop 3 are stably locked in the storage or extended position. Compared to the traditional method of manually inserting and removing locking components, this method eliminates the need for direct contact with the locking parts, making the locking and releasing process smoother and further reducing the difficulty of operation for the user.

[0052] Furthermore, such as Figure 8 As shown, the locking mechanism 5 also includes a fixing cylinder 54, which is vertically connected to the opposite walls of the two cantilever members 42. It can connect the two cantilever members 42 into a whole, thereby improving the coordination of the dual-side drive mechanism 4.

[0053] In this embodiment, two sets of drive mechanisms 4 are provided, and each drive mechanism 4 is matched with a locking end 52. Therefore, if two drive mechanisms 4 are provided, two locking ends 52 are matched. That is, there are two drive ends 51 and two transmission components 53. The two drive ends 51, two transmission components 53 and two locking ends 52 are arranged symmetrically with respect to the axis of the fixed cylinder 54.

[0054] Specifically, in this embodiment, the transmission assembly 53 includes a connecting rod 531, an elastic element 532, and a fixing ring 533. The locking end 52, connecting rod 531, and driving end 51 are connected sequentially. The connecting rod 531 passes through the fixed cylinder 54, allowing axial movement of all three components 54. A moving hole 541 is provided on the outer wall of the fixed cylinder 54, allowing the driving end 51 to be movably positioned within the moving hole 541 along the axis of the fixed cylinder 54. This ensures that the driving end 51 always moves precisely along the axis of the fixed cylinder 54, preventing movement deviation or jamming, and making the locking / unlocking action smoother and more reliable. The fixing ring 533 is sleeved on the connecting rod 531, and its outer wall is fixedly connected to the inner wall of the fixed cylinder 54. It guides the movement trajectory of the connecting rod 531, ensuring that the connecting rod 531 always moves precisely along the axis of the fixed cylinder 54, preventing movement deviation or jamming. The locking end 52 is located at the end of the fixed cylinder 54. The elastic element 532 is sleeved on the connecting rod 531, and both ends of the elastic element 532 abut against or are fixedly connected to the locking end 52 and the fixed ring 533, respectively, to provide a rebound force to the locking end 52. This allows the locking end 52 to automatically insert into the low-position locking hole a or the high-position locking hole b under the action of the elastic force, eliminating the need for manual pushing and greatly simplifying the operation process. At the same time, the elastic element 532 continuously applies pressure to the locking end 52 toward the low-position locking hole a or the high-position locking hole b, ensuring that the locking end 52 and the low-position locking hole a or the high-position locking hole b are always tightly inserted. This effectively prevents accidental unlocking caused by external forces such as vibration and collision, significantly improving the anti-loosening performance of the locking mechanism 5 and ensuring the stability of the extended table 3 in use or storage. Pulling or releasing the drive end 51 causes the connecting rod 531 and the locking end 52 to move simultaneously toward or away from the slide rail assembly 41 and along the axis of the fixed cylinder 54, so that the locking end 52 disengages from or inserts into the low locking hole a or the high locking hole b, thereby unlocking or locking the extension table 3. That is, Figure 8As shown, when it is necessary to rotate the extended tabletop 3 from the storage position or the extended position to the extended position or the storage position, it is only necessary to drive the two drive ends 51 to move towards each other in the moving hole 541 at the same time, so as to simultaneously drive the connecting rod 531 and the locking end 52 corresponding to the two drive ends 51 to move away from the low locking hole a or the high locking hole b, so that the locking end 52 disengages from the low locking hole a or the high locking hole b, thereby unlocking the extended tabletop 3. At this time, the elastic element 532 is in a compressed state. Then, through the action of the two rotating parts 43, the locking mechanism 5 can rotate with the rotation of the cantilever part 42. When the locking end 52 is aligned with the high locking hole b or the low locking hole a, the two driving ends 51 are released at the same time, so that the two driving ends 51 move in opposite directions due to the rebound force of the elastic part 532. At the same time, the locking end 52, the connecting rod 531 and the driving end 51 move towards the low locking hole a or the high locking hole b due to the rebound force of the elastic part 532, so that the locking end 52 can be inserted into the extension slot or the storage slot, thereby accurately locking the extension table 3 in the extension position or the storage position, improving the operability and portability of the locking mechanism 5.

[0055] In this design, the driving end 51 can be a handle, a lever, etc., the locking end 52 can be a plug, a locking pin, a locking rod, etc., and the elastic element 532 can be a spring. Of course, in other embodiments, the locking end 52 can also be directly connected to the linkage rod or through other rigid or elastic connections. The driving end adapts to the form of the locking end to perform corresponding driving operations.

[0056] Furthermore, such as Figures 2-4 As shown, the extended tabletop 3 includes a horizontal plate 31 and a vertical plate 32 connected in an L-shape. When the extended tabletop 3 is in both its low and high positions, the horizontal plate 31 is horizontal. The vertical plate 32 is connected to the front end of the horizontal plate 31 and extends vertically downwards. The front part of the cantilever 42 is fixedly connected to the vertical plate 32 via a front bracket 6. This allows the load of the horizontal plate 31 to be more evenly transferred and distributed to the cantilever 42 and the drive mechanism 4 through the vertical plate 32, reducing local stress and extending the service life of each component. Furthermore, the vertical plate 32 can act as a baffle, concealing the drive mechanism 4 when in its stowed position, thus achieving compact, concealed storage.

[0057] Preferably, the drive end 51 is positioned horizontally towards the vertical plate 32 and passes through the vertical plate 32, allowing the user to easily operate the drive end 51 to drive the locking end 52 into or out of the lower locking hole a or the higher locking hole b via the transmission assembly 53, making operation convenient. Simultaneously, the portion of the drive end 51 passing through the vertical plate 32 bends towards its corresponding locking pin for easier user operation. Furthermore, the distance between the two drive ends 51 is sufficient for one-handed pulling, thereby improving the efficiency of locking and unlocking the extended tabletop 3 and simplifying operation.

[0058] Furthermore, such as Figures 4-7 As shown, the slide rail assembly 41 includes a fixed slide rail 411, a primary slide rail 412, a secondary slide rail 413, and a tertiary slide rail 414 arranged sequentially from the outside in. These four slide rails are vertically arranged, but their extension directions are all in the direction of extending and retracting the tabletop, and the four slide rails can slide relative to each other. The openings of the fixed slide rail 411, primary slide rail 412, and secondary slide rail 413 all face the cantilever member 42, and their openings are opposite to those of the tertiary slide rail 414. The fixed slide rail 411 is fixedly installed on the inner wall of its corresponding support plate 2. The primary slide rail 412 is slidably connected to the fixed slide rail 411, the secondary slide rail 413 is slidably connected to the primary slide rail 412, and the tertiary slide rail 414 is slidably connected to the secondary slide rail 413. At least two rotating parts 43 are rotatably mounted on the side wall of the third-stage slide rail 414 away from the second-stage slide rail 413 via a pivot. Both the low-position locking hole a and the high-position locking hole b are formed on the third-stage slide rail 414. The low-position locking hole a and the high-position locking hole b are through holes; however, in other embodiments, they can also be non-through holes. By setting the fixed slide rail 411, the first-stage slide rail 412, the second-stage slide rail 413, and the third-stage slide rail 414, which are nested and slidably connected in sequence, a multi-stage telescopic structure is formed. This significantly increases the horizontal sliding stroke of the extended tabletop 3, enabling a larger desktop extension area even in limited installation space, greatly improving the adaptability of the desktop extension table.

[0059] Furthermore, such as Figures 4-7 As shown, the slide rail assembly 41 also includes multiple balls 415. Grooves 4131 are provided at both the top and bottom of the secondary slide rail 413, and the multiple balls 415 are respectively placed in the two grooves 4131. The outer walls of the multiple balls 415 in the groove 4131 at the top of the secondary slide rail 413 are in contact with the top inner wall of the primary slide rail 412 and the top outer wall of the tertiary slide rail 414. The outer walls of the multiple balls 415 in the groove 4131 at the bottom of the secondary slide rail 413 are in contact with the bottom inner wall of the primary slide rail 412 and the bottom outer wall of the tertiary slide rail 414. This reduces the friction between the secondary slide rail 413 and the primary and tertiary slide rails 412 and 414, converting sliding friction into rolling friction. This significantly reduces the friction between the multiple slide rails, making the sliding and pushing-back process of the extended tabletop 3 extremely smooth and effortless. Among them, the fixed slide rail 411, the first-level slide rail 412, the second-level slide rail 413, the third-level slide rail 414 and the ball bearing 415 are preferably made of stainless steel or aluminum alloy.

[0060] Furthermore, the multiple ball bearings 415 can also serve as brakes. In the stowed state, the multiple ball bearings 415 have gaps between them; when the extended table 3 is pulled to move, the cantilever 42 drives the third-stage slide rail 414 to move relative to the second-stage slide rail 413, the multiple ball bearings 415 roll and the gaps decrease until the relative movement of the third-stage slide rail 414 and the second-stage slide rail 413 squeezes the multiple ball bearings 415. At this time, the first-stage slide rail 412 and the third-stage slide rail 414 are locked with the second-stage slide rail 413; if the extended table 3 is pulled further, the third-stage slide rail 414, the first-stage slide rail 412 and the second-stage slide rail 413 move together relative to the fixed slide rail 411 until the extended table 3 is completely extended out of the fixed table 1, at which point the pulling of the extended table 3 is stopped.

[0061] When the third-stage slide rail 414 slides relative to the second-stage slide rail 413, multiple balls 415 roll accordingly, making the movement of the third-stage slide rail 414 smoother. Due to the continuous movement of the third-stage slide rail 414, the gap between the multiple balls 415 decreases until they press against each other, increasing the friction between them. This locks the first-stage slide rail 412, second-stage slide rail 413, and third-stage slide rail 414, achieving braking and preventing the balls 415 from rolling out of the groove 4131. Simultaneously, when the first-stage slide rail 412, second-stage slide rail 413, and third-stage slide rail 414 are braked due to the pressure of the balls 415, the first-stage slide rail 412 can continue to slide relative to the fixed slide rail 411 through its sliding connection with the fixed slide rail 411, allowing the extended tabletop 3 to continue extending, thus extending the tabletop of the fixed tabletop 1 and improving the adaptability and versatility of the tabletop extension table.

[0062] Furthermore, such as Figure 5 As shown, the slide rail assembly 41 also includes a limiting plate 416. The limiting plate 416 is vertically arranged and is vertically fixedly connected to one end of the third-level slide rail 414 facing the extended tabletop 3. The limiting plate 416 extends towards the second-level slide rail 413 to limit the sliding range of the third-level slide rail 414, so that the third-level slide rail 414 stops at the preset storage reference position after each retraction, avoiding asymmetrical storage of the two-sided drive mechanism 4 due to excessive or insufficient retraction, ensuring that the extended tabletop 3 does not shift when stored in a low position, and preventing the third-level slide rail 414 from derailing, deforming or structurally damaged due to excessive retraction, thus ensuring the overall aesthetics and compactness of the space in the stored state.

[0063] Based on the above structure, the working principle of a desktop extension table in this embodiment is as follows:

[0064] like Figure 1 and Figure 2As shown, this embodiment is first assembled. After assembly, the extended tabletop 3 is in the stowed position, and the two locking ends 52 are inserted into the low-position locking holes a. When it is necessary to extend the length of the fixed tabletop 1, the extended tabletop 3 is first pulled, so that the extended tabletop 3 extends out of the fixed tabletop 1. At the same time, the cantilever 42 moves with the movement of the extended tabletop 3, so that the third-stage slide rail 414 moves relative to the second-stage slide rail 413. As the extended tabletop 3 continues to extend, the gap between the multiple balls 415 gradually decreases. After the multiple balls 415 press against each other, both the first-stage slide rail 412 and the third-stage slide rail 414 are locked to the second-stage slide rail 413, achieving braking. If the extended tabletop 3 has not yet fully extended from the fixed tabletop 1, the extended tabletop 3 can be pulled further, causing the first-level slide rail 412, the second-level slide rail 413, and the third-level slide rail 414 to move simultaneously relative to the fixed slide rail 411, so that the extended tabletop 3 can continue to extend from the fixed tabletop 1. Pulling the extended tabletop 3 should be stopped once it is fully extended from the fixed tabletop 1.

[0065] Then, simultaneously drive the two drive ends 51 to move towards each other within the two moving holes 541, causing them to respectively drive their corresponding connecting rods 531 and locking ends 52 to move along the axis of the fixed cylinder 54 in a direction away from the low-position locking hole a, so that the two locking ends 52 disengage from the two low-position locking holes a on the two three-stage slide rails 414, at which point the extended table 3 is in the unlocked state. Then lift the extended table 3, so that the cantilever 42 moves with the lifting of the extended table 3, and the two rotating parts 43 rotate around the axis of their first end, while the cantilever 42 rotates around the axis of the second end of the two rotating parts 43, so that the cantilever 42 and the horizontal plate 31 of the extended table 3 are always in a horizontal state. When the top surface of the horizontal plate 31 of the extended table 3 is adjacent to and flush with the top surface of the fixed table 1, stop lifting the extended table 3. Then, both drive ends 51 are released simultaneously, causing the locking end 52, connecting rod 531, and drive end 51 to move in opposite directions due to the rebound force of elastic element 532. This allows the two locking ends 52 to be inserted into the two high-position locking holes b on the two three-stage slide rails 414, thereby completing the desktop extension of the fixed tabletop 1 in this embodiment of the desktop extension table. Figure 3 and Figure 4 As shown.

[0066] When it is necessary to retract the extended tabletop 3 from its extended position into its retracted position, the unlocking steps described above are continued to unlock the extended tabletop 3 from its extended position. Then, the extended tabletop 3 is lowered, allowing it to rotate under the fixed tabletop 1 via the cantilever 42 and the two rotating members 43. The extended tabletop 3 is then pushed, causing it to retract into the fixed tabletop 1 via the slide rail assembly 41 until the limiting plate 416 abuts against the end of the secondary slide rail 413 near the extended tabletop 3. At this point, the extended tabletop 3 is in its retracted position. Finally, the two driving ends 51 simultaneously cause the two locking ends 52 to insert into the two low-position locking holes a on the three-stage slide rail 414, thereby retracting the extended tabletop 3. Figure 1 and Figure 2 As shown.

[0067] Example 2

[0068] Unlike Example 1, as Figure 10 As shown, in this embodiment, the front part of the cantilever 42 is fixedly connected to the vertical plate 32 and the horizontal plate 31 through the front bracket 6 and the upper bracket 7, respectively, so that the connection between the cantilever 42 and the extended table 3 is more stable. When the extended table 3 is subjected to load, the load can be transferred to the cantilever 42 through the upper bracket 7 and the front bracket 6, and then transferred to the slide rail assembly 41 through the rotating member 43, thereby improving the strength and stability of the extended table 3 when bearing load.

[0069] Example 3

[0070] Unlike Embodiment 1 and Embodiment 2, as Figure 11 As shown, in this embodiment, the extended table 3 is a horizontal plate 31. When the extended table 3 is in a low position or a high position, the horizontal plate 31 is in a horizontal state. The front part of the cantilever 42 is fixedly connected to the horizontal plate 31 through the upper bracket 7. The horizontal plate 31 consumes less material, has a lighter structure, reduces the load on the drive mechanism 4, makes the extension and lifting operation of the extended table 3 easier, and simplifies the processing technology, which helps to reduce manufacturing costs.

[0071] Additionally, when the extended tabletop 3 is a horizontal plate 31, the drive end 51 can be set vertically or horizontally. A horizontal setting is preferred for ease of user operation.

[0072] Example 4

[0073] Unlike Embodiment 1, the locking mechanism 5 (not shown in the figure) in this embodiment includes two fixed cylinders 54, two driving ends 51, four locking ends 52, four elastic elements 532, four connecting rods 531 and four fixing rings 533.

[0074] Two fixing cylinders 54 are respectively fixed and vertically connected to the opposite side walls of the two cantilever members 42. The two fixing cylinders 54 are located at the end of the cantilever member 42 closer to the extended table 3 and the end of the cantilever member 42 away from the extended table 3, respectively. Each fixing cylinder 54 contains two locking ends 52, two elastic elements 532, two connecting rods 531, and two fixing rings 533. The two fixing rings 533 are fixedly installed on the inner wall of the fixing cylinder 54. The two locking ends 52, two elastic elements 532, two connecting rods 531, and two fixing rings 533 in the same fixing cylinder 54 are symmetrically arranged with respect to the horizontal centerline of the extension direction of the extended table 3.

[0075] Both drive ends 51 are horizontally positioned and symmetrically arranged along the horizontal centerline of the extending tabletop 3. The two drive ends 51 pass through two fixed cylinders 54 and a vertical plate 32 in sequence. Furthermore, each drive end 51 is vertically mounted with two connecting rods 531. The end of each connecting rod 531 away from the drive end 51 is connected to a locking end 52. An elastic element 532 is fitted on the outer wall of each connecting rod 531, and each connecting rod 531 passes through a fixing ring 533. The two ends of each elastic element 532 abut against or connect to the opposite sidewalls of its corresponding locking end 52 and fixing ring 533.

[0076] Low-position locking holes a and high-position locking holes b are respectively provided on the side walls at both ends of the two three-stage slide rails 414. The four locking ends 52 can pass through the second ends of the four rotating parts 43 and the two ends of the two cantilever parts 42 in sequence, and are respectively inserted into the four low-position locking holes a or the four high-position locking holes b of the two three-stage slide rails 414. Specifically, when the extended table 3 is unlocked, the two driving ends 51 are driven to move towards each other at the same time, so that the four connecting rods 531 and the four locking ends 52 move towards each other at the same time, so that the four locking ends 52 disengage from their corresponding four low-position locking holes a or high-position locking holes b. At this time, the four elastic parts 532 are all compressed. At this time, the extended table 3 is in the unlocked state. When the extended tabletop 3 is locked, the two drive ends 51 are released simultaneously. The four locking ends 52 move toward the low locking hole a or the high locking hole b due to the rebound force of their corresponding elastic elements 532. At this time, the elastic elements 532 rebound, and the four connecting rods 531 and the two drive ends 51 move with the movement of their corresponding locking ends 52. The two drive ends 51 move in opposite directions so that the four locking ends 52 are respectively inserted into their corresponding high locking hole b or low locking hole a, thereby locking the extended tabletop 3.

[0077] By setting four locking ends 52, the locking mechanism 5 is made more stable when locking the extended table 3 and the cantilever 42, and also more stable when supporting the extended table 3 and the cantilever 42.

[0078] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0079] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0080] In this utility model, unless otherwise explicitly 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 indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "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 the present invention. 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.

[0082] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A desktop extension table, comprising a main table body with a fixed tabletop (1), an extension tabletop (3), at least one drive mechanism (4) for moving the extension tabletop (3) between a storage position housed inside the main table body and an extension position adjacent and flush with the fixed tabletop (1), and a locking mechanism (5), characterized in that, The drive mechanism (4) includes a slide rail assembly (41), a cantilever (42), and at least two rotating members (43). The at least two rotating members (43) connect the cantilever (42) to the slide rail assembly (41) in a translational manner between a low position and a high position. The locking mechanism (5) can selectively lock the cantilever (42) in a low position or a high position. The front part of the cantilever (42) is fixed to the extension table (3). The slide rail assembly (41) is connected to the main table body and can drive the cantilever (42) located at the lower position and the extension table (3) located at the lower position to extend and retract relative to the main table body. When the extended tabletop (3) extends relative to the main table body and is in a high position, the extended tabletop (3) is in the extended position.

2. The desktop extension table as described in claim 1, characterized in that: In the drive mechanism (4): At least two of the rotating members (43) are arranged in a parallel and inclined state along the extension direction of the extended table (3), the first end of the rotating member (43) is rotatably connected to the slide rail assembly (41), the second end of the rotating member (43) is rotatably connected to the cantilever member (42), and the cantilever member (42) is horizontal in both the low and high positions; The tilt angle range of the rotating component (43) is 0°-30°.

3. The desktop extension table as described in claim 2, characterized in that: The locking mechanism (5) includes a drive end (51), a locking end (52) and a transmission assembly (53). Each drive mechanism (4) is matched with at least one locking end (52). The locking end (52) is movably connected to the second end of the rotating member (43) in a direction perpendicular to the cantilever member (42). The slide rail assembly (41) is provided with a low-position locking hole (a) and a high-position locking hole (b). The positions of the low-position locking hole (a) and the high-position locking hole (b) are on the arc trajectory of the locking end (52) with the rotation connection point between the first end of the rotating member (43) and the slide rail assembly (41) as the center. The driving end (51) drives the locking end (52) via the transmission assembly (53) to selectively plug into the low-position locking hole (a) or the high-position locking hole (b) to selectively lock the cantilever (42) in the low or high position.

4. The desktop extension table as described in claim 3, characterized in that: Two sets of drive mechanisms (4) are set up and fixed to the left and right sides of the main table body, respectively.

5. The desktop extension table as described in claim 4, characterized in that: The locking mechanism (5) further includes a fixing cylinder (54), which is vertically connected to the opposite walls of the two cantilever members (42); The transmission assembly (53) includes a connecting rod (531), an elastic element (532), and a retaining ring (533); The locking end (52), the connecting rod (531) and the driving end (51) are connected in sequence. The locking end (52) is located at the end of the fixed cylinder (54), and the locking end (52) can pass through its corresponding cantilever (42) and be inserted into the low locking hole (a) or the high locking hole (b) to lock the extended table (3) in the low or high position. The outer wall of the fixed cylinder (54) is provided with a movable hole (541), and the driving end (51) can be movably placed in the movable hole (541) along the axis of the fixed cylinder (54). The fixing ring (533) is sleeved on the connecting rod (531), and the outer wall of the fixing ring (533) is fixedly connected to the inner wall of the fixing cylinder (54) for guiding the movement trajectory of the connecting rod (531). The elastic element (532) is sleeved on the connecting rod (531), and the two ends of the elastic element (532) abut or are fixedly connected to the locking end (52) and the fixing ring (533) respectively, so as to provide a rebound force for the locking end (52); Pulling or releasing the drive end (51) can cause the connecting rod (531) and the locking end (52) to move simultaneously toward the slide rail assembly (41) and along the axis of the fixed cylinder (54), so that the locking end (52) disengages from or is inserted into the low locking hole (a) or the high locking hole (b), thereby unlocking or locking the extension table (3).

6. The desktop extension table as described in claim 1, characterized in that: The extended tabletop (3) includes a horizontal plate (31) and a vertical plate (32) connected in an L-shape. When the extended tabletop (3) is in a low or high position, the horizontal plate (31) is horizontal. The vertical plate (32) is connected to the front end of the horizontal plate (31) and extends vertically downward. The front part of the cantilever (42) is fixedly connected to the vertical plate (32) via a front bracket (6) and / or fixedly connected to the horizontal plate (31) via an upper bracket (7); or The extended table (3) is a horizontal plate (31). When the extended table (3) is in a low position or a high position, the horizontal plate (31) is in a horizontal state. The front part of the cantilever (42) is fixedly connected to the horizontal plate (31) through the upper bracket (7).

7. The desktop extension table as described in claim 6, characterized in that: The cantilever component (42) is a long strip plate; The first and second ends of the rotating component (43) are both circular plates (431), the two circular plates (431) are fixedly connected by a connecting plate (432), and the first end of each rotating component (43) is rotatably connected to the slide rail assembly (41), and the second end of each rotating component (43) is rotatably connected to the cantilever component (42).

8. The desktop extension table as described in claim 5, characterized in that: The slide rail assembly (41) includes a fixed slide rail (411), a primary slide rail (412), a secondary slide rail (413), and a tertiary slide rail (414) arranged sequentially from the outside to the inside. The openings of the fixed slide rail (411), the first-level slide rail (412) and the second-level slide rail (413) are all facing the cantilever (42), and are arranged opposite to the opening of the third-level slide rail (414). The fixed slide rail (411) is fixedly installed on the left or right side of the main table body. The first-level slide rail (412) is slidably connected to the fixed slide rail (411). The second-level slide rail (413) is slidably connected to the first-level slide rail (412). The third-level slide rail (414) is slidably connected to the second-level slide rail (413). The first end of the rotating component (43) is rotatably mounted on the side wall of the third-level slide rail (414) away from the second-level slide rail (413), and the low-position locking hole (a) and the high-position locking hole (b) are both opened on the third-level slide rail (414).

9. The desktop extension table as described in claim 8, characterized in that: The slide rail assembly (41) also includes a plurality of balls (415). The top and bottom of the secondary slide rail (413) are provided with grooves (4131), and multiple balls (415) are respectively placed in the two grooves (4131); The outer walls of the multiple balls (415) in the groove (4131) at the top of the secondary slide rail (413) are in contact with the top inner wall of the primary slide rail (412) and the top outer wall of the tertiary slide rail (414). The outer walls of the multiple balls (415) in the groove (4131) at the bottom of the secondary slide rail (413) are in contact with the bottom inner wall of the primary slide rail (412) and the bottom outer wall of the tertiary slide rail (414) to reduce the friction between the secondary slide rail (413) and the primary slide rail (412) and the tertiary slide rail (414).

10. The desktop extension table as described in claim 9, characterized in that: The slide rail assembly (41) also includes a limiting plate (416). The limiting plate (416) is vertically set, and the limiting plate (416) is vertically fixedly connected to one end of the three-stage slide rail (414) facing the extended table (3). The limiting plate (416) extends toward the secondary slide rail (413) to limit the sliding range of the tertiary slide rail (414).

Images