Reversible folding base mechanism and mahjong machine

Abstract

The utility model provides a kind of overturning folding base mechanism and mahjong machine, overturning folding base mechanism includes fixed base, overturning base, stand, overturning support, upper connecting rod and lower connecting rod;The overturning base is hinged on fixed base, and fixed base and overturning base are unfolded horizontally to form support base together;The stand is vertically fixed on fixed base, and the top end of the stand is hinged on overturning support, and overturning support can realize horizontal position and vertical position overturning switching under the limiting action of the top surface and side surface of the stand;The bottom end of the upper connecting rod is hinged on the top end of lower connecting rod, and the stand is vertically provided with sliding slot, and the hinged shaft of the upper connecting rod and lower connecting rod is slidably arranged in the sliding slot;The top end of the upper connecting rod is hinged on overturning support, and the bottom end of lower connecting rod is hinged on overturning base.The mechanism can realize 90° overturning folding of base, greatly reduce the occupied space in non-use state;Buffer damping closure is realized by double connecting rod linkage structure, and component loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mahjong machine technology, specifically to a flip-foldable base mechanism and a mahjong machine equipped with the flip-foldable base mechanism. Background Technology

[0002] As a common entertainment device, the practicality of the base mechanism of a mahjong machine directly affects the user experience and space utilization. Most existing mahjong machine bases are fixed structures, which occupy a large amount of space and are difficult to store, especially when not in use. Some foldable bases use a single-link transmission structure, which is prone to hard contact during folding and lacks buffering and damping effects. This not only generates collision noise but also easily leads to wear and tear on parts, shortening the service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a flip-foldable base mechanism that enables the base to flip and fold 90°, significantly reducing the space occupied when not in use; and achieves buffered damping closure through a double-link linkage structure, avoiding hard contact during the folding process and reducing component wear.

[0004] The technical solution of this utility model:

[0005] This utility model provides a flip-up folding base mechanism, including a fixed base, a flip-up base, a column, a flip-up bracket, an upper connecting rod, and a lower connecting rod. The flip-up base is hinged to the fixed base, and the fixed base and the flip-up base together form a supporting base when horizontally unfolded. The column is vertically fixed to the fixed base, and the flip-up bracket is hinged to the top of the column. Under the limiting action of the top surface and side surface of the column, the flip-up bracket can achieve flip-up switching between horizontal and vertical positions. The bottom end of the upper connecting rod is hinged to the top end of the lower connecting rod. A vertical groove is provided on the column, and the hinge shaft connecting the upper and lower connecting rods is slidably and vertically arranged in the groove. The top end of the upper connecting rod is hinged to the flip-up bracket, and the bottom end of the lower connecting rod is hinged to the flip-up base. When the flip-up bracket flips, it drives the flip-up base to flip synchronously through the upper and lower connecting rods.

[0006] According to one embodiment of the present invention, the fixed base includes a connecting seat and a base frame; the connecting seat is installed at the bottom of the column, and the base frame is detachably installed on the connecting seat by bolts.

[0007] According to one embodiment of the present invention, the base frame includes two parallel insert rods and a connecting rod connecting one end of the two insert rods; each insert rod is inserted into the insertion hole of the corresponding connecting seat and fixed by bolts.

[0008] According to one embodiment of the present invention, the base frame further includes a sealing plate; the sealing plate is fixed to a frame composed of two insert rods and a connecting rod.

[0009] According to one embodiment of the present invention, the flipping base includes two flipping rods arranged in parallel, a fixing rod fixed between one end of the two flipping rods, and a base plate fixed to the two flipping rods and the fixing rod; the end of each flipping rod away from the fixing rod is hinged to the corresponding connecting seat.

[0010] According to one embodiment of the present invention, two columns are arranged in parallel; each column has a connecting seat and a flipping bracket fixed at its bottom and top respectively, and each column has a corresponding sliding groove. Each flipping bracket is hinged to the flipping base through a corresponding upper connecting rod and lower connecting rod.

[0011] According to one embodiment of the present invention, the flipping bracket includes a top plate and two folded plates vertically connected to both sides of the top plate to form a U-shaped groove; the width of the U-shaped groove is adapted to the thickness of the top of the column, so that the flipping bracket is horizontally limited to the top of the column through the U-shaped groove.

[0012] According to one embodiment of the present invention, it further includes a hook fixed to the flipping bracket and an elbow clamp installed on the column; the elbow clamp is used to lock and fix the hook so that the flipping bracket is in a horizontal support state.

[0013] According to one embodiment of the present invention, it further includes four rollers installed at the bottom of the fixed base and two rollers installed at the bottom of the flip base; at least two rollers of the fixed base are equipped with a self-locking mechanism.

[0014] This utility model also provides a mahjong machine, including a main body and the aforementioned flip-foldable base mechanism; the main body is mounted on the flip-folding bracket.

[0015] The flip-up folding base mechanism of this utility model has outstanding advantages in terms of ease of operation, space utilization and structural durability through the innovative design of double linkage and limit guide structure, and has significant practical value.

[0016] I. Buffer Protection and Controllable Trajectory Enhance Durability: The mechanism adopts a double-link structure formed by the hinge of the upper and lower links. The hinge axis of the two links can slide vertically along the groove of the column, forming a buffer positioning effect similar to damping linkage, achieving slow closing, effectively avoiding component damage and noise caused by hard contact, and extending service life. At the same time, the coordinated operation of the double links can achieve multi-track control. Compared with the single-link structure, it has stronger controllability over the flipping and folding process, ensuring stable and reliable operation.

[0017] II. Synchronous Linkage, Efficient and Labor-Saving Operation: This utility model utilizes the hinged connection between the upper and lower connecting rods, combined with the lifting and sliding of their hinge shafts within the groove of the column, to directly transmit the flipping action of the flipping bracket to the flipping base, achieving synchronous flipping switching between the two. The expansion and folding of the support base can be completed without additional drive components, greatly simplifying the operation process. Furthermore, the lever effect of the double connecting rods effectively reduces the force required for flipping, improving ease of use.

[0018] 3. Precise positioning and convenient folding storage: The flip-up bracket can precisely switch between horizontal and vertical positions thanks to the positioning on the top and sides of the column. Simultaneously, a double-link linkage drives the flip-up base to rotate synchronously around the fixed base. When folded, the flip-up bracket is in a vertical position, with the flip-up base folded to the side of the fixed base. This transforms the originally horizontally unfolded support base into a compact structure, significantly reducing space occupation when not in use, and adapting to storage needs in various scenarios such as homes and game rooms.

[0019] IV. Stable Structure and Strong Support and Protection: When the fixed base and the tilting base are horizontally unfolded, they together form a complete support base. Combined with the limiting support of the uprights for the tilting bracket and the synergistic force distribution of the double connecting rods, the weight load of the equipment can be effectively distributed, improving the overall support stability and load-bearing capacity of the mechanism. At the same time, the sliding trajectory of the hinge shaft along the slide groove is controllable, which can form a buffer effect during the tilting process, avoiding hard contact between the tilting bracket and the tilting base due to rapid rotation, reducing component collision and wear, and extending the service life of the mechanism.

[0020] In summary, this mechanism, through its synchronous linkage, precise positioning, and stable support structural design, effectively solves the problems of cumbersome operation, large space occupation, and easy wear and tear of traditional base mechanisms, and has extremely high practicality and promotional value.

[0021] The preferred embodiments of this utility model and their beneficial effects will be further described in detail in conjunction with specific implementation methods. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but should not be construed as limiting the present invention. In the drawings:

[0023] Figure 1 This is a perspective view of the flip-foldable base mechanism of this utility model;

[0024] Figure 2 This is an exploded view of the flip-foldable base mechanism of this utility model;

[0025] Figure 3 This is a front view of the flip-foldable base mechanism of this utility model;

[0026] Figure 4 This is a diagram showing the usage state of the flip-foldable base mechanism of this utility model.

[0027] The following are the reference numerals: 1. Fixed base; 2. Flip base; 3. Column; 4. Flip bracket; 5. Upper connecting rod; 6. Lower connecting rod; 30. Slide groove; 11. Connecting seat; 12. Base frame; 13. Bolt; 121. Insert rod; 122. Connecting rod; 123. Sealing plate; 21. Flip rod; 22. Fixed rod; 23. Base plate; 41. Top plate; 42. Folding plate; 7. Hook; 8. Elbow clamp; 9. Roller. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0029] Please see Figures 1 to 4 This utility model provides a flip-foldable base mechanism, including a fixed base 1, a flip base 2, a column 3, a flip bracket 4, an upper connecting rod 5, and a lower connecting rod 6.

[0030] The flip base 2 is hinged to the fixed base 1. When the fixed base 1 and the flip base 2 are horizontally unfolded, they together form a support base.

[0031] The column 3 is vertically fixed to the fixed base 1. The flip bracket 4 is hinged to the top of the column 3. Under the limiting action of the top surface and side surface of the column 3, the flip bracket 4 can realize the flip switching between the horizontal and vertical positions.

[0032] The bottom end of the upper connecting rod 5 is hinged to the top end of the lower connecting rod 6. A vertical groove 30 is provided on the column 3. The hinge shaft that connects the upper connecting rod 5 and the lower connecting rod 6 is slidably mounted in the groove 30.

[0033] The top end of the upper connecting rod 5 is hinged to the flipping bracket 4, and the bottom end of the lower connecting rod 6 is hinged to the flipping base 2.

[0034] When the flip bracket 4 flips, the flip base 2 flips synchronously through the upper connecting rod 5 and the lower connecting rod 6.

[0035] The flip-up folding base mechanism of this utility model has outstanding advantages in terms of ease of operation, space utilization and structural durability through the innovative design of double linkage and limit guide structure, and has significant practical value.

[0036] I. Buffer Protection and Controllable Trajectory Enhance Durability: The mechanism adopts a double-link structure formed by the hinge of upper link 1 and lower link 6. The hinge axis of the two links can slide vertically along the groove of column 4, forming a buffer positioning effect similar to damping linkage, achieving slow closing, effectively avoiding component damage and noise caused by hard contact, and extending service life. At the same time, the coordinated operation of the double links can achieve multi-track control. Compared with the single-link structure, it has stronger controllability in the flipping and folding process, ensuring stable and reliable operation.

[0037] II. Synchronous Linkage, Efficient and Labor-Saving Operation: This utility model utilizes the hinged connection between the upper connecting rod 5 and the lower connecting rod 6, combined with the lifting and sliding of their hinge shaft within the slide groove 30 of the column 3, to directly transmit the flipping action of the flipping bracket 4 to the flipping base 2, achieving synchronous flipping switching between the two. The expansion and folding of the support base can be completed without additional drive components, greatly simplifying the operation process. Furthermore, the lever effect of the double connecting rods effectively reduces the force required for flipping, improving ease of use.

[0038] III. Precise Positioning and Convenient Folding Storage: The flip bracket 4, with its top and side supports of the column 3, precisely switches between horizontal and vertical positions. Simultaneously, a double-link linkage drives the flip base 2 to rotate around the fixed base 1. When folded, the flip bracket 4 is in a vertical position, and the flip base 2 is folded to the side of the fixed base 1, transforming the originally horizontally unfolded support base into a compact structure. This significantly reduces space occupation when not in use, making it suitable for storage needs in various scenarios such as homes and game rooms.

[0039] IV. Stable Structure and Strong Support and Protection: When the fixed base 1 and the tilting base 2 are horizontally unfolded, they together form a complete support base. Combined with the limiting support of the column 3 for the tilting bracket 4 and the synergistic force distribution of the double connecting rods, the weight load of the equipment can be effectively distributed, improving the overall support stability and load-bearing capacity of the mechanism. At the same time, the sliding trajectory of the hinge shaft along the slide groove 30 is controllable, which can form a buffer effect during the tilting process, avoiding hard contact between the tilting bracket 4 and the tilting base 2 due to rapid rotation, reducing component collision wear, and extending the service life of the mechanism.

[0040] In summary, this mechanism, through its synchronous linkage, precise positioning, and stable support structural design, effectively solves the problems of cumbersome operation, large space occupation, and easy wear and tear of traditional base mechanisms, and has extremely high practicality and promotional value.

[0041] In this embodiment, the fixed base 1 includes a connecting seat 11 and a base frame 12. The connecting seat 11 is installed at the bottom of the column 3. The base frame 12 is detachably installed on the connecting seat 11 by bolts 13. The fixed base 1 is composed of the connecting seat 11 and the base frame 12 detachably connected by bolts 13. Compared with an integrated base structure, the components can be disassembled during transportation or storage, significantly reducing the packaging and storage volume, reducing the difficulty of handling, and improving the convenience of carrying and storage. It can be understood that the fixed base 1 can also be an integrated base structure.

[0042] In this embodiment, the base frame 12 includes two parallel insert rods 121 and a connecting rod 122 connecting one end of the two insert rods 121. Each insert rod 121 is inserted into the corresponding insertion hole of the connecting seat 11 and fixed by bolts 13. The base frame 12 is inserted into the corresponding insertion hole of the connecting seat 11 by the two parallel insert rods 121. The cooperation between the insertion hole and the insert rod 121 can form a pre-positioning effect. The mounting holes of the bolts 13 can be quickly aligned without repeatedly adjusting the relative position of the base frame 12 and the connecting seat 11. Compared with bolt connections without guidance, this greatly shortens the assembly time and improves the installation efficiency.

[0043] In this embodiment, the base frame 12 also includes a sealing plate 123, which is fixed to the frame formed by the two insert rods 121 and the connecting rod 122. The sealing plate 123, fixed to the frame formed by the two insert rods 121 and the connecting rod 122, connects the originally dispersed rod-shaped frame into an integrated rigid structure, effectively enhancing the deformation resistance of the base frame 12. Compared to a simple frame structure, this design can more evenly distribute the weight of the equipment and external forces, reduce stress concentration at the connection between the insert rods 121 and the connecting rod 122, and significantly improve the load-bearing reliability and overall structural stability of the base frame 12.

[0044] In this embodiment, the flip base 2 includes two flip rods 21 arranged in parallel, a fixing rod 22 fixed between one end of the two flip rods 21, and a base plate 23 fixed to the two flip rods 21 and the fixing rod 22. The end of each flip rod 21 away from the fixing rod 22 is hinged to the corresponding connecting seat 11.

[0045] The ends of the two flipping rods 21 furthest from the fixed rod 22 are respectively hinged to the corresponding connecting seats 11, forming a symmetrical hinged support structure. This design ensures that the flipping base 2 is subjected to balanced forces on both sides when rotating around the hinge point, avoiding flipping jams or offsets caused by unilateral forces. Combined with the linkage of the double connecting rods, it can achieve smooth and synchronous flipping with the flipping bracket, improving the stability and accuracy of operation.

[0046] The tilting base 2 is constructed with two parallel tilting rods 21 and a fixed rod 22 forming a basic frame, which, together with the base plate 23 fixed to the frame, forms a complete support structure. Compared to a single rod-shaped or plate-shaped structure, the frame provides rigid support for the base plate 23, while the base plate 23 transforms the dispersed frame force into a planar load-bearing structure, which can more evenly distribute the weight of the equipment and effectively improve the load-bearing capacity and support stability of the tilting base 2.

[0047] In this embodiment, two columns 3 are arranged in parallel. Each column 3 has a connecting seat 11 and a flipping bracket 4 fixed at its bottom and top, respectively. Each column 3 has a corresponding sliding groove 30. Each flipping bracket 4 is hinged to the flipping base 2 through a corresponding upper connecting rod 5 and lower connecting rod 6.

[0048] Two columns 3 are arranged in parallel, with connecting seats 11 fixed at their bottoms and flipping brackets 4 connected to their tops, forming a symmetrical double-column support structure. Compared with a single-column design, the double columns can more evenly distribute the weight of the equipment and external loads, reduce stress concentration at a single support point, and, together with the planar bearing capacity of the flipping base 2, significantly enhance the overall mechanism's anti-overturning ability and support reliability.

[0049] Two upright columns 3 are provided with corresponding sliding grooves 30, and each flipping bracket 4 is hinged to the flipping base 2 via an independent upper connecting rod 5 and a lower connecting rod 6, forming a double set of symmetrical linkage mechanisms. The double sets of connecting rods move synchronously under the guidance of the corresponding sliding grooves, which can ensure that the flipping trajectory of the flipping brackets on both sides and the flipping base are completely consistent, avoiding unilateral deviation or jamming, making the flipping process smoother and more stable, and improving the accuracy and convenience of operation.

[0050] The symmetrically distributed double-column and double-link structure distributes the stress on the tilting bracket 4, connecting rods, and tilting base 2 evenly to both sides of the components, preventing excessive wear caused by overload on a single connecting rod or column. Simultaneously, the stable support of the double columns reduces assembly gap wobble between the connecting seat 11 and the base frame 12, lowers collision losses at each hinge point, and effectively extends the service life of the overall mechanism.

[0051] In this embodiment, the flip-up bracket 4 includes a top plate 41 and two folded plates 42 vertically connected to both sides of the top plate 41, forming a U-shaped groove. The width of the U-shaped groove is adapted to the thickness of the top of the column 3, so that the flip-up bracket 4 is horizontally limited to the top of the column 3 through the U-shaped groove. The flip-up bracket 4 forms a U-shaped groove through the top plate 41 and the two side folded plates 42, and the width of the U-shaped groove is adapted to the thickness of the top of the column 3, so that the top of the column 3 can be fitted and limited therein. Compared with a support structure with a single contact point, the U-shaped groove can form a wrapping limit on the column 3 from both sides and the top, effectively preventing the flip-up bracket 4 from shifting or shaking in the horizontal direction, and greatly improving its support stability when carrying equipment.

[0052] In this embodiment, the upper connecting rod 5 and the lower connecting rod 6 are flat rods. As core linkage components, the use of flat rods in the upper connecting rod 5 and the lower connecting rod 6 can more stably transmit the force between the flipping bracket 4 and the flipping base 2, effectively distribute the load, reduce the risk of connecting rod deformation, and significantly improve the load-bearing stability and service life of the double-link linkage structure.

[0053] This utility model's flip-up folding base mechanism also includes a hook 7 fixed to the flip-up bracket 4 and an elbow clamp 8 mounted on the column 3. The elbow clamp 8 is used to lock and fix the hook 7, so that the flip-up bracket 4 is in a horizontal support state. When the flip-up bracket 4 is flipped to the horizontal use position, the hook 7 fixed to the flip-up bracket 4 can precisely cooperate with the elbow clamp 8 on the column 3, and the elbow clamp 8 locks and fixes the hook 7, which can form a rigid limit for the flip-up bracket 4. Compared with the positioning method that relies solely on connecting rods or gravity, this locking structure can effectively prevent the flip-up bracket 4 from accidentally flipping when bearing the weight of the equipment or being impacted by external forces, significantly improving the structural stability and safety protection of the mechanism during use.

[0054] The flip-folding base mechanism of this utility model also includes four rollers 9 mounted on the bottom of the fixed base 1, and two rollers 9 mounted on the bottom of the flip base 2. At least two rollers 9 of the fixed base 1 are equipped with a self-locking mechanism.

[0055] The four rollers 9 at the bottom of the fixed base 1 and the two rollers 9 at the bottom of the flip base 2 form multi-point rolling support, allowing the entire mechanism to move flexibly in any direction. Compared with a fixed structure without rollers, this significantly reduces the difficulty of moving and repositioning the equipment. Whether it's relocating the equipment for home storage or optimizing the layout in scenarios such as a game room, it can be easily achieved, significantly improving the mechanism's adaptability to different scenarios.

[0056] At least two rollers 9 of the fixed base 1 are equipped with a self-locking mechanism. When the mechanism is extended to the use state, locking the rollers 9 restricts their rolling, ensuring the overall support base is stably positioned and effectively preventing the equipment from shifting or sliding due to external impacts or vibrations during use. Compared to roller designs without a self-locking function, this structure significantly improves the stability of the mechanism when carrying equipment and reduces safety hazards.

[0057] In this embodiment, a crossbeam is connected between the bottoms of the two columns 3, and a cover plate is fixed on the crossbeam.

[0058] The core working principle of this utility model's flip-foldable base mechanism is as follows: Driven by the flipping action of the flipping bracket 4, a double-link linkage structure consisting of the upper link 5 and the lower link 6, combined with the lifting guide of the hinge shaft within the slide groove 30 of the column 3, enables the synchronous flipping switching of the flipping bracket 4 and the flipping base 2. Simultaneously, the limiting effect of the column 3 ensures the accuracy of the action. The specific process is divided into two stages: unfolding and folding.

[0059] I. Unfolding process (from storage state to usage state)

[0060] In the initial state, the flip bracket 4 is in a vertical storage position under the limiting action of the side of the column 3, and the flip base 2 is folded to the side of the fixed base 1 under the pull of the double connecting rod. The hinge shaft is located in the upper area of ​​the slide groove 30 of the column 3.

[0061] When the mechanism needs to be unfolded, external force drives the flipping bracket 4 to flip upwards around its hinge point with the top of the column 3 until the top of the column 3 forms a limit on it, stabilizing the flipping bracket 4 in a horizontal position. During this process, the flipping bracket 4 drives the top of the upper connecting rod 5, which is hinged to it, to rotate downwards synchronously. The bottom of the upper connecting rod 5 drives the top of the lower connecting rod 6 to move through the hinge shaft. Because the hinge shaft is restricted by the vertical guide of the slide groove 30 of the column 3, it can only slide downwards along the slide groove 30. The bottom of the lower connecting rod 6 then pushes the flipping base 2, which is hinged to it, causing the flipping base 2 to flip downwards around its hinge point with the fixed base 1. Finally, the flipping base 2 and the fixed base 1 unfold together to form a horizontal support base, and the hinge shaft slides to the lower limit position of the slide groove 30, completing the unfolding action of the mechanism.

[0062] II. Folding process (from usage state to storage state)

[0063] In use, the flip bracket 4 remains horizontal under the limiting action of the top surface of the column 3, the flip base 2 and the fixed base 1 are horizontally unfolded, and the hinge shaft is located at the lower part of the slide groove 30.

[0064] When folding and storage are required, external force drives the flipping bracket 4 to flip downwards around the hinge point, disengaging from the top surface limit of the column 3 and moving towards the side of the column 3 until the side of the column 3 limits it to form a vertical storage state. During this process, the flipping bracket 4 drives the top of the upper connecting rod 5 to rotate upwards synchronously, and the bottom of the upper connecting rod 5 pulls the top of the lower connecting rod 6 through the hinge shaft, and the hinge shaft slides upwards along the slide groove 30. The bottom of the lower connecting rod 6 then pulls the flipping base 2, causing the flipping base 2 to flip upwards around its hinge point with the fixed base 1, gradually folding it to the side of the fixed base 1. Finally, the hinge shaft slides to the upper limit position of the slide groove 30, and both the flipping bracket 4 and the flipping base 2 are stored, realizing the folding action of the mechanism.

[0065] In summary, through the active flipping of the flipping bracket 4, the force and motion transmission of the double linkage, the guiding sliding of the hinge shaft in the slide groove 30, and the limiting positioning of the column 3, the mechanism can achieve precise synchronous linkage between the flipping bracket and the flipping base, and achieve efficient switching between support and storage states.

[0066] This utility model also provides a mahjong machine, including the above-mentioned flip-foldable base mechanism, with the main body of the mahjong machine mounted on the flip bracket 4.

[0067] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying importance; the words "bottom surface" and "top surface," "inner" and "outer" respectively refer to the geometric direction toward or away from a specific component.

[0068] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0069] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A reversible folding base mechanism, characterized by, It includes a fixed base (1), a flip base (2), a column (3), a flip bracket (4), an upper connecting rod (5), and a lower connecting rod (6). The flip base (2) is hinged to the fixed base (1), and the fixed base (1) and the flip base (2) together form a support base when they are horizontally unfolded. The column (3) is vertically fixed on the fixed base (1), and the flip bracket (4) is hinged to the top of the column (3). Under the limiting action of the top surface and side surface of the column (3), the flip bracket (4) can realize the flip switching between the horizontal position and the vertical position. The bottom end of the upper connecting rod (5) is hinged to the top end of the lower connecting rod (6), and a sliding groove (30) is vertically provided on the column (3). The hinge shaft that is hinged to the upper connecting rod (5) and the lower connecting rod (6) can be raised and lowered and slidably arranged in the sliding groove (30). The top end of the upper connecting rod (5) is hinged to the flipping bracket (4), and the bottom end of the lower connecting rod (6) is hinged to the flipping base (2). When the flipping bracket (4) flips, the upper connecting rod (5) and the lower connecting rod (6) drive the flipping base (2) to flip synchronously.

2. The reversible folding base mechanism of claim 1, wherein, The fixed base (1) includes a connecting seat (11) and a base frame (12); the connecting seat (11) is installed at the bottom of the column (3), and the base frame (12) is detachably installed on the connecting seat (11) by bolts (13).

3. The flip-up foldable base mechanism according to claim 2, characterized in that, The base frame (12) includes two parallel insert rods (121) and a connecting rod (122) connecting one end of the two insert rods (121); each insert rod (121) is inserted into the insertion hole of the corresponding connecting seat (11) and fixed by bolts (13).

4. The flip-up foldable base mechanism according to claim 3, characterized in that, The base frame (12) also includes a sealing plate (123); the sealing plate (123) is fixed to the frame formed by two insert rods (121) and a connecting rod (122).

5. The flip-up foldable base mechanism according to claim 2, characterized in that, The flip base (2) includes two flip rods (21) arranged in parallel, a fixing rod (22) fixed between one end of the two flip rods (21), and a base plate (23) fixed on the two flip rods (21) and the fixing rod (22); the end of each flip rod (21) away from the fixing rod (22) is hinged to the corresponding connecting seat (11).

6. The flip-up foldable base mechanism according to claim 2, characterized in that, Two columns (3) are arranged in parallel; each column (3) has a connecting seat (11) and a flipping bracket (4) fixed at its bottom and top respectively. Each column (3) has a corresponding sliding groove (30) and each flipping bracket (4) is hinged to the flipping base (2) through the corresponding upper connecting rod (5) and lower connecting rod (6).

7. The flip-up foldable base mechanism according to claim 1, characterized in that, The flipping bracket (4) includes a top plate (41) and two folding plates (42) vertically connected to both sides of the top plate (41) to form a U-shaped groove; the width of the U-shaped groove is adapted to the thickness of the top of the column (3) so that the flipping bracket (4) is horizontally limited to the top of the column (3) through the U-shaped groove.

8. The flip-up foldable base mechanism according to claim 1, characterized in that, It also includes a hook (7) fixed to the flip bracket (4) and an elbow clamp (8) installed on the column (3); the elbow clamp (8) is used to lock the hook (7) so that the flip bracket (4) is in a horizontal support state.

9. The flip-up foldable base mechanism according to claim 1, characterized in that, It also includes four rollers (9) mounted on the bottom of the fixed base (1) and two rollers (9) mounted on the bottom of the flip base (2); at least two rollers (9) of the fixed base (1) are equipped with a self-locking mechanism.

10. A mahjong machine, characterized in that, It includes a main body and a flip-foldable base mechanism as described in any one of claims 1-9; the main body is mounted on the flip-fold bracket (4).

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