Integrated board game apparatus

Abstract

An integrated board game apparatus, comprising a board main body and at least one game-piece transformation unit arranged therein. The game-piece transformation unit comprises: a left base and a left flap connected thereto by means of a left hinge; and a right base and a right flap connected thereto by means of a right hinge. The left flap and the right flap are connected to each other by means of a middle hinge, and one of the left base and the right base is linearly displaceable relative to the other in the thickness direction of the board main body. The board game apparatus of the present invention can realize game piece placing and game piece capturing by means of a simple pressing operation, and has the advantages of convenient piece moving, obvious distinguishability between different types of pieces, portability, etc.

Description

Integrated chess set Technical Field

[0001] This invention relates to a chess set, and more particularly to a Go set. Background Technology

[0002] Existing chess sets typically consist of an independent chessboard and pieces. Users manipulate the pieces on a horizontally placed board, and the pieces are collected in a container after the game. The independent nature of the board and pieces makes these sets inconvenient to carry and prone to accidental movement of the pieces. Furthermore, prolonged play with such sets requires looking down at the board, which can cause neck and shoulder discomfort, particularly detrimental to the health of adolescents who are still developing.

[0003] Patent applications KR200330389Y1, CN102836547A, CN101474478A, CN209790832U, CN2358948Y, CN2496513Y, CN2040792U, CN2274508Y, CN2363755Y, CN203043509U, and CN86208082U disclose integrated, flat-mounted Go boards with essentially similar structures. The multi-faceted Go pieces are rotatably positioned at corresponding points on the board, and moves are made by manually rotating the pieces to reveal their respective faces (corresponding to black, white, and empty pieces). While this system integrates the board and pieces, the need for an additional rotating mechanism results in a complex structure, increased size, and higher cost. Furthermore, this rotating method of play is both inconvenient to operate and does not conform to traditional Go playing habits.

[0004] CN2037624U, CN88203058U, and CN201949608U disclose integrated, flat-position Go boards with essentially similar structures. The Go pieces are configured as two hinged halves, and moves are made by manually flipping one half of the piece outwards to overlap with the other half. While this type of device achieves integration of the board and pieces, it is only suitable for portable boards made of foldable or rollable sheet material. Furthermore, this manual outward-flipping method is inconvenient to operate and does not conform to traditional Go playing habits.

[0005] US3781014 discloses a chess set including a perforated chessboard for vertical use and individual chess pieces. When in use, the pieces are placed on horizontal brackets extending to both sides of the chessboard through the perforations. After use, the pieces can be collected in a storage box. When using this set, players on either side of the vertical chessboard can see the pieces on the horizontal brackets through the corresponding perforations, thus solving the problem of players needing to spend long periods looking down at a horizontally placed chessboard, as is common with conventional sets. However, this set has a complex structure, a very unsightly appearance, and is inconvenient to use. Furthermore, the individual pieces are very easy to accidentally fall off the board during play.

[0006] CN118649407A or WO2024160241A1 discloses an integrated chess set that can be used vertically. This chess set features an integrated chessboard and pieces, making it particularly suitable for dual-games such as Go or Gomoku. The chessboard can be used vertically, and the type or status of a piece is distinguished by whether it is recessed, flush, or protruding from the board. This chess set offers numerous advantages, including convenient movement, quick reset, protection from visual distractions, relief from prolonged neck and shoulder muscle tension, effective prevention of undoing moves, and portability. However, since this chess set primarily distinguishes the type of piece (placement) by the recess or protrusion of the (movable) pieces relative to the board, its visual differentiation needs further improvement. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated chess set that is at least easy to operate.

[0008] According to one aspect of the present invention, a chess set is provided, comprising a chessboard body and at least one piece conversion unit disposed therein, wherein the at least one piece conversion unit comprises:

[0009] The left base and the left flap connected to it via the left hinge; and

[0010] The right base and the right flap connected to it via the right hinge,

[0011] The left and right flaps are connected to each other by a central hinge, and one of the left and right bases is linearly movable relative to the other along the thickness direction of the chessboard body.

[0012] In a preferred embodiment of the chess piece conversion unit of the present invention, the left flip plate and the right flip plate have the same flip plate thickness and are arranged flush with each other (side by side) on the corresponding left base and right base, and both the left base and the right base are linearly movable relative to the chessboard body.

[0013] The left and right bases are preferably connected by a transmission mechanism so that when one of them moves relative to the chessboard body, the other moves in the opposite direction relative to the chessboard body. For automated chess sets, the left and right bases may also be controlled and driven separately instead of being connected by a transmission mechanism.

[0014] The transmission mechanism can be configured such that the inward displacement of one of the left and right bases relative to the chessboard body is always equal to the outward displacement of the other of the left and right bases relative to the chessboard body. Such a reverse synchronous transmission mechanism may, for example, include a left rack on the left base, a right rack on the right base, and a common gear engaged between the left and right racks, the common gear being rotatable about an axis perpendicular to the thickness direction of the chessboard body.

[0015] This reverse synchronous shifting structure ensures that the overall concavity and convexity of the piece conversion unit relative to the main board remains constant, and during manual operation, the shifting distance of the corresponding base is only the thickness of a flip plate to complete the corresponding conversion. Although it is possible to make only one of the left and right bases linearly shiftable relative to the main board while keeping the other fixed, this would not only cause the entire piece conversion unit to shift relative to the main board but also double the shifting distance of the corresponding base.

[0016] The transmission mechanism can also be configured such that when one of the left and right bases shifts inward by a first predetermined distance relative to the chessboard body, the other of the left and right bases shifts outward by a second predetermined distance relative to the chessboard body, causing one of the left and right flip plates, which are arranged horizontally on each other by default, to flip outward and overlap the other of the left and right flip plates. The first predetermined distance is less than the thickness of the flip plate, the second predetermined distance is greater than the thickness of the flip plate, and the sum of the two is equal to twice the thickness of the flip plate. Such a reverse asynchronous transmission mechanism may, for example, include: an upper left rack and a lower left rack integrally formed on the left rack holder; an upper right rack and a lower right rack integrally formed on the right rack holder; pinions that mesh with the upper left and upper right racks on one transmission plane; and large gears that mesh with the lower left and lower right racks on another transmission plane, wherein the pinions and large gears are coaxially arranged and can rotate relative to each other with a restriction.

[0017] By adopting this reverse asynchronous shift structure, the overall concavity and convexity of the piece conversion unit relative to the main body of the chessboard can be changed. That is, in the default state, it can be flush with the main body of the chessboard, and in the piece state, it can protrude from the main body of the chessboard.

[0018] The left and right flip plates of the chess piece conversion unit can be designed as semi-circular or rectangular plates with the same thickness of 1-10 mm, such as a semi-circular plate with a radius of about 1 cm and a thickness of about 3 mm.

[0019] The main body of the chessboard can also be equipped with a limiting mechanism for the relative limit travel of the left and right bases.

[0020] In another preferred embodiment of the chess set of the present invention, both the left base and the right base (at the opposite end to their flip plates) are connected to reverse stops, which are also arranged flush with each other by default. Therefore, by keeping these reverse stops flush with each other, the left and right flip plates can be quickly returned to their default positions.

[0021] For example, the chess set of the present invention may further include a reset plate, movably mounted on the chessboard body along the thickness direction of the chessboard body. The reverse stops provided on the left and right bases, when flush, can cooperate to prevent the reset plate from moving further toward the chessboard body. The reset plate allows each piece switching unit to quickly and conveniently return to its default central position. Alternatively, the reset plate can be omitted, and movable legs can be used to support the chessboard body; in this case, the tabletop support can serve as the reset plate.

[0022] Furthermore, the aforementioned reverse stops can also have aligned concave lines, which, together with corresponding concave lines formed on the reverse surface of, for example, the main body of the chessboard, can create a tactile chess game pattern. When the chess set is used upright, visually impaired individuals can touch the corresponding chess game pattern on this reverse side of the main body of the chessboard and press and manipulate the corresponding reverse stops to interact and play against the person on the other side without interfering with each other.

[0023] The left and right flip panels can also have aligned recessed lines, which, together with corresponding recessed lines on the surface of the chessboard, can form a visible and tactile chessboard pattern. This allows the player to use the chess set from the same side regardless of their visual limitations.

[0024] According to a specific embodiment of the chess set of the present invention, the main body of the chessboard has a display surface, the left base has a first chess piece surface, the right base has a second chess piece surface, the left flip panel has a default surface and a reversed first chess piece surface, and the right flip panel has a default surface and a reversed second chess piece surface. When they are aligned with each other, the first chess piece surface and the reversed first chess piece surface constitute a first chess piece pattern, and the second chess piece surface and the reversed second chess piece surface constitute a second chess piece pattern. The two default surfaces of the left and right flip panels, together with the display surface of the main body of the chessboard, define the default pattern.

[0025] In another preferred embodiment of the chess piece conversion unit of the present invention, the left flip plate and the right flip plate have a symmetrical configuration, and the left base and the right base also have a similar symmetrical configuration.

[0026] In another preferred embodiment of the chess piece conversion unit of the present invention, each hinge is a film hinge made of an independent thin film or composed of different portions of the same thin film. Any other suitable elastic or flexible sheet hinge, such as a paper hinge, or even a mechanical rigid hinge, may also be used.

[0027] In addition, each membrane hinge is preferably configured to bend and unfold around the rounded inner edge of the corresponding flap or base. This configuration of the membrane hinges not only allows the flaps to fit flat against each other or against the corresponding base, but also minimizes the default distance between them without excessively affecting the appearance of the piece conversion unit and the entire chessboard.

[0028] Furthermore, the left base, left flap, right flap, and right base are preferably arranged to magnetically attract each other sequentially. This structural arrangement further facilitates the flat and secure fit of the flaps.

[0029] In another preferred embodiment of the chess piece conversion unit of the present invention, the chessboard body defines at least one receiving hole for accommodating the at least one chess piece conversion unit, and the inner wall of the at least one receiving hole is provided with a longitudinal dividing rib, which protrudes inside the intermediate hinge between the left and right flaps that are arranged flush with each other by default. Preferably, two opposing longitudinal dividing ribs are provided.

[0030] The partition ribs ensure that the spacing between the default flush or side-by-side flaps and the base remains constant, effectively preventing rotation and resulting in more even stress on the membrane hinges. Additionally, the partition ribs also contribute to the smooth flipping of the flaps.

[0031] The chess piece conversion unit of the present invention may further include:

[0032] The reverse left base and the reverse left flap connected to it via the reverse left hinge; and

[0033] The reverse right base and the reverse right flap connected to it via the reverse right hinge.

[0034] The reverse left flap and the reverse right flap are connected to each other by a reverse middle hinge. The left base and the reverse left base are connected as one unit, and the right base and the reverse right base are also connected as one unit.

[0035] When using the aforementioned chess piece conversion unit with a symmetrical structure at both ends, the main body of the chessboard can also have a reverse display surface, a reverse left base with a second chess piece surface, a reverse right base with a first chess piece surface, a reverse left flip plate with a default surface and a reverse second chess piece surface, and a reverse right flip plate with a default surface and a reverse first chess piece surface. When they are aligned with each other, the first chess piece surface of the reverse right base and the reverse first chess piece surface of the reverse right flip plate constitute the first chess piece pattern, the second chess piece surface of the reverse left base and the reverse second chess piece surface of the reverse left flip plate constitute the second chess piece pattern, and the two default surfaces of the reverse left flip plate and the reverse right flip plate together define the default pattern with the reverse display surface of the main body of the chessboard.

[0036] This symmetrical chess set can be used vertically, allowing players to sit on either side for convenient gameplay. For example, the white player sits on one side and the black player on the other. Players can quickly place or capture pieces by pressing the lower flip-up panel of each piece switching unit. Of course, the piece switching unit can also be designed so that both players can play either black or white, as long as the black and white colors are displayed differently on the same side. Using this structure also reduces visual distractions and neck and shoulder muscle strain during gameplay, creating a more comfortable playing environment.

[0037] The chess set of the present invention is preferably a chess set such as Go, Gomoku or Checkers with two kinds of chess pieces, and the at least one chess piece conversion unit is a plurality of chess piece conversion units forming an array.

[0038] According to another aspect of the present invention, a display device (e.g., a picture frame) is also provided, which includes at least one conversion unit, said at least one conversion unit comprising:

[0039] A left base and at least one left flap, which are pivotally connected in sequence; and

[0040] The right base and at least one right flap are pivotally connected in sequence.

[0041] The outermost flap of the at least one left flap and the outermost flap of the at least one right flap are also pivotally connected together, and one of the left base and the right base is linearly displaceable relative to the other.

[0042] In summary, the integrated chess set of the present invention can realize the placement and capture of pieces through simple tap operations, and has the advantages of convenient chess moves, clear distinction between different types of chess pieces, and portability. Attached Figure Description

[0043] Figure 1 is a perspective view of a chess set according to an embodiment of the present invention;

[0044] Figure 2 is a partial cross-sectional view of the chess set shown in Figure 1, which includes two chess piece conversion units;

[0045] Figure 3 is a front view of the chess piece conversion unit in the middle default position in Figure 2;

[0046] Figure 4 is a top view of the chess piece conversion unit shown in Figure 3;

[0047] Figure 5 is a front view of the piece conversion unit in the second conversion position;

[0048] Figure 6 is a perspective view of the main body of the chessboard of a chess set according to another embodiment of the present invention;

[0049] Figure 7 is a partial perspective view of the chess set shown in Figure 6 with the chess piece conversion unit installed.

[0050] Figure 8 is a perspective view of the chess piece conversion unit shown in Figure 7 in the middle default state;

[0051] Figure 9 is a front view of the chess piece conversion unit shown in Figure 7 during the flipping process;

[0052] Figure 10 is a cross-sectional view of the chess piece conversion unit shown in Figure 9;

[0053] Figure 11 is a front view of a chess piece conversion unit according to yet another embodiment of the present invention;

[0054] Figure 12 is a front view of a chess set in use according to another embodiment of the present invention, wherein the legs are in a downwardly extending support position relative to the chessboard body.

[0055] Figure 13 is a front view of the chess set shown in Figure 12 in an abnormal use state, in which the legs are in a retracted position relative to the main body of the chessboard.

[0056] Figure 14 is a perspective view of the chess set shown in Figure 12;

[0057] Figure 15 is an enlarged longitudinal section of the upper part of the chess piece conversion unit shown in Figure 3;

[0058] Figure 16 is a perspective view showing the assembly of each thin film hinge and each thin film retainer in Figure 15.

[0059] Figure 17 is a perspective view of the thin-film hinge;

[0060] Figure 18 is a perspective view of the thin film holder;

[0061] Figure 19 is a schematic perspective view of the base and the flap on the same side connected together by a membrane hinge;

[0062] Figure 20 is a partial cross-sectional view of a chess set according to another embodiment of the present invention;

[0063] Figure 21 is a top view of the chess set shown in Figure 20, with the bases and flip panels removed;

[0064] Figure 22 is a schematic diagram of the chess set shown in Figure 20 in an upright position;

[0065] Figure 23 is a partial perspective view of a chess set according to another embodiment of the present invention, Figure 24 is a corresponding top view, and Figure 25 is a cross-sectional view of one of the chess piece conversion units.

[0066] Figure 26 is a side view of the upper part of the chess piece conversion unit shown in Figure 25, and Figure 27 is its assembly perspective view.

[0067] Figure 28 is an exploded perspective view of the upper part of the chess piece conversion unit shown in Figure 27;

[0068] Figure 29 is a schematic diagram of the assembly of the thin film retainer and the thin film hinge;

[0069] Figure 30 is a schematic diagram of the partitioning of the thin film hinge;

[0070] Figures 31 and 32 show perspective and sectional views of several chess piece conversion units, respectively;

[0071] Figure 33 shows a partial perspective view of the main body of the chessboard;

[0072] Figures 34 and 35 show cross-sectional views of several chess piece conversion units with different transmission mechanisms.

[0073] Figure 36 shows a cross-sectional view of a chess piece conversion unit with a reverse asynchronous transmission mechanism;

[0074] Figure 37 is a schematic diagram of the installation of the pinion and gear of the transmission mechanism shown in Figure 36, and Figure 38 is a perspective view of the two gears when they are separated.

[0075] Figure 39 is a cross-sectional view of the chess piece conversion unit shown in Figure 36 in the first conversion position; and

[0076] Figure 40 shows the bottom of the chess set shown in Figures 12-14 in a partial perspective view. Detailed Implementation

[0077] The chess set of the present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0078] Figure 1 is a perspective view of a chess set according to an embodiment of the present invention. The chess set includes a chessboard body 10 having an upper surface 14 and a plurality of independent piece conversion units 20 or 20', which are manually operablely disposed in corresponding receiving holes 12 within the chessboard body 10. The chessboard body 10 is also provided with legs 11 and a reset plate 13, which will be described in further detail later. For ease of manufacturing, the illustrated chessboard body 10 is designed as two parts, upper and lower, which are connected as one piece by fasteners, for example, in mounting holes 15. The upper surface 14 can also be finished with a film or paint to form the desired display surface.

[0079] Figure 2 is a partial cross-sectional view of the chess set shown in Figure 1, which includes two chess piece conversion units 20 and 20'. Figure 3 is a front view of the chess piece conversion unit 20 in the default middle position in Figure 2, and Figure 4 is its top view. As shown in Figures 2-4, the chess piece conversion unit 20 includes a semi-circular left base 21 with a left rack 25 fixed thereon and a semi-circular right base 22 with a right rack 26 fixed thereon. The left rack 25 and the right rack 26 mesh with a common pinion 27, which is rotatable around an axis 270 fixed to the chessboard body 10. The axis 270 is installed perpendicular to the thickness direction of the chessboard body 10. In addition, the left rack 25 is provided with a straight guide rib 250, and the right rack 26 is also provided with a straight guide rib 260 (as shown more clearly in Figure 5), which respectively cooperate with the corresponding guide grooves provided on the inner wall of the receiving hole 12 of the chessboard body 10. Thus, when the left base 21 moves downward in a straight line a certain distance, the right base 22 moves upward in a straight line a certain distance. Furthermore, a left stop base 28 is fixed to the lower end of the left rack 25, and a right stop base 29 is fixed to the lower end of the right rack 26. Stop shoulders 16, 17, 18, and 19 are also respectively provided on the inner wall of the receiving hole 12 of the chessboard body 10 shown in Figure 2.

[0080] As shown more clearly in Figure 3, a semi-circular left flap 23 is stacked on the left base 21, and the two are connected by a flexible or elastic membrane hinge 31; a semi-circular right flap 24 is stacked on the right base 22, and the two are connected by a membrane hinge 32. The left flap 23 and the right flap 24 are also connected by a membrane hinge 30.

[0081] The left base 21 and the right base 22 have symmetrical shapes and remain flush with each other in the default position shown in Figure 3. The left flap 23 and the right flap 24 also have similar symmetrical shapes and the same thickness, and remain flush with each other in the default position shown in Figure 3, and are substantially flush with or slightly protruding from the upper surface 14 of the chessboard body 10.

[0082] As shown in Figure 2, when the piece conversion unit 20' is manipulated, for example by pressing down on the left flip plate 23, the left base 21 will descend until it contacts the chessboard stop shoulder 16 after descending one flip plate thickness; simultaneously, the right base 22 will rise parallel to the left by one flip plate thickness until the right stop base 29 contacts the stop shoulder 17. During the rising process of the right base 22, the right flip plate 24 on it will automatically flip to the left until it is stacked on the left flip plate 23.

[0083] Figure 5 shows another state of the piece switching unit 20. By pressing the right flip plate 24, the right base 22 descends while the left base 21 rises, and the left flip plate 23 automatically flips to the right until it is stacked on the right flip plate 24.

[0084] Thus, when the piece conversion unit 20 is in the default middle position as shown in Figure 3, the left flip plate 23 and the right flip plate 24 are side by side, with the surface 230 of the left flip plate 23 and the surface 240 of the right flip plate 24 flush with each other, defining the default display pattern together with the upper surface 14 of the chessboard body 10, such as the yellow pattern shown in Figure 7. When the piece conversion unit 20' is in the first conversion position as shown in Figure 2, the right flip plate 24 flips over the left flip plate 23, with the surface 241 of the right flip plate 24 flush with the surface 220 of the right base 22, thus forming the first piece display pattern, such as the black pattern shown in Figure 7. When the piece conversion unit is in the second conversion position as shown in Figure 5, the left flip plate 23 flips over the right flip plate 24, with the surface 231 of the left flip plate 23 flush with the surface 210 of the left base 21, thus forming the second piece display pattern, such as the white pattern shown in Figure 7.

[0085] As shown in Figures 1 and 2, the reset plate 13 is slidably mounted vertically relative to the chessboard body 10. During normal operation of the piece conversion unit 20, the reset plate 13 is located at the bottom of the chessboard body 10, without interfering with the movement of the left stop base 28 and the right stop base 29. When it is necessary to return all piece conversion units to their default central position, the reset plate 13 is moved relative to the chessboard body 10 until all the left stop bases 28 and right stop bases 29 are aligned, thereby coordinating to prevent further relative movement of the reset plate 13.

[0086] Figures 12-14 show a variation of the embodiment shown in Figure 2, in which the reset plate 13 is omitted, and the support leg 11' is no longer fixedly connected to the chessboard body 10, but is pivotally connected to the chessboard body 10 and located on the outside of the lower side frame. The chess pieces shown in Figures 12 and 14 are in a playing state with the support leg 11' extending downward relative to the chessboard body 10, while the chess piece shown in Figure 13 is in a reset state with the support leg 11' retracted upward relative to the chessboard body 10.

[0087] As shown in Figure 12, for the piece conversion unit 20 or 20' in the first conversion position, the corresponding left stop base 28 extends downwards from the lower edge 110 of the chessboard body 10; for the piece conversion unit 20 or 20' in the second conversion position, the corresponding right stop base 29 extends downwards from the lower edge 110 of the chessboard body 10; for the piece conversion unit 20 or 20' in the middle default position, the corresponding left stop base 28 and right stop base 29 are flush with each other and flush with the lower edge 110 of the chessboard body 10 or may slightly protrude downwards from the lower edge 110 of the chessboard body 10.

[0088] When the chess set shown in Figure 13 is placed on a flat surface such as a table, since the legs 11' have been pivoted upwards and retracted relative to the chessboard body 10, the left stop bases 28 and right stop bases 29 extending from the lower edge 110 of the chessboard body 10 will move upwards under the action of gravity or manually applied downward pressure until the left stop bases 28 and right stop bases 29 of all the piece conversion units 20 or 20' are flush with each other. In this way, all the piece conversion units 20 or 20' will quickly return to the default central position.

[0089] As an alternative, the legs 11' in Figures 12-14 can also be pivotally located inside the lower side frame of the chessboard body 10 (hidden and invisible when retracted) or configured to be quickly detachable from the chessboard body 10. This also allows each piece conversion unit 20 or 20' to quickly and easily return to the default central position without a reset plate. Figure 40 shows a bottom design of the chess set shown in Figures 12-14 in partial perspective. As shown in Figure 40, the chessboard body has a lower surface 114 and a lower edge 110 surrounding the lower surface. The shapes of the left stop base 28 and the right stop base 29 can be similar to those of the left base 21 and the right base 22. A longitudinal concave line 281 is formed on the outer surface of the left stop base 28, and a longitudinal concave line 291 is formed on the outer surface of the right stop base 29. The longitudinal concave lines 281 and 291 are aligned with each other and can also be aligned with corresponding longitudinal concave lines optionally formed on the lower surface 114. Furthermore, since a lateral gap is formed between the left stop base 28 and the right stop base 29 of the same piece switching unit, a lateral concave line can be optionally formed on the lower surface 114 to align with the corresponding lateral gap. In this way, the lower surface 114 of the chessboard body can form a corresponding tactile chess game pattern through these lateral and longitudinal concave lines and the variations in the convexity and concavity of the left stop base 28 and the right stop base 29. Additionally, a positioning notch 1140 can be formed at a specific location on the lower surface 114 to facilitate quick tactile positioning. When the chess set is used upright, a visually impaired person can touch the corresponding chess game pattern on one side of the chessboard body and press and manipulate the corresponding left stop base 28 or right stop base 29 to interact and play against the person on the other side without interfering with each other.

[0090] Figure 15 is an enlarged cross-sectional view of the upper part of the chess piece conversion unit 20 shown in Figure 3. As shown in Figure 15, a first thin-film retainer 212 is provided in the left base 21, a second thin-film retainer 222 is provided in the right base 22, a third thin-film retainer 232 is provided in the left flap 23, and a fourth thin-film retainer 242 is provided in the right flap 24. The thin-film hinge 30 is held in place by the third thin-film retainer 232 and the fourth thin-film retainer 242, the thin-film hinge 31 is held in place by the third thin-film retainer 232 and the first thin-film retainer 212, and the thin-film hinge 32 is held in place by the fourth thin-film retainer 242 and the second thin-film retainer 222.

[0091] Figure 16 shows the various film hinges and film retainers in Figure 15 more clearly, but the semi-cylindrical shells of the left base 21, right base 22, left flap 23, and right flap 24 are removed. Figure 17 is a perspective view of the film hinge, and Figure 18 is a perspective view of the film retainer. As shown in Figures 15-18, the first film retainer 212 is designed as a symmetrical insert plate with elastic locking legs 2120 formed on the outer side for insertion into the circumferential locking groove 211 of the left base 21.

[0092] For ease of manufacturing, each membrane retainer and each membrane hinge can be designed to have identical or symmetrical structures. Therefore, the following description uses membrane hinge 30 as an example to illustrate its fixing method.

[0093] As shown more clearly in Figures 17 and 18, a back plate 301 is bonded to one side of the membrane hinge 30, which is received in a groove 2321 on the upper side of the third membrane retainer 232 in a form-fit manner; the other side of the membrane hinge 30 is held in the same manner by the fourth membrane retainer 242. When the third membrane retainer 232 (via its elastic locking leg 2320) and the fourth membrane retainer 242 are respectively inserted into and fixed in the semi-cylindrical outer shell of the left flap 23 and the semi-cylindrical outer shell of the right flap 24, the membrane hinge 30 is held below the upper panel of the semi-cylindrical outer shell of the left flap 23 and the upper panel of the semi-cylindrical outer shell of the right flap 24, in a flattened state as shown in Figure 15. The thickness of the membrane hinge is preferably less than 1 mm, more preferably less than 0.5 mm, for example, 0.2 mm.

[0094] Figure 19 shows a schematic diagram of the left base 21 and the left flap 23 connected together by a thin-film hinge 31. As shown in Figure 19, the upper panel 213 of the left base 21, the upper panel 233 and the lower panel 234 of the left flap 23 all form an arc structure with a radius equal to its thickness R on the inner side of their straight edges. The upper and lower parts of the inner edge 2322 of the third thin-film retainer 232 shown are also rounded to reduce the frictional resistance when the left flap 23 flips, but the middle part is formed into a plane to facilitate the corresponding alignment of the left flap 23 with the right flap 24 or the left base 21. Although not specifically shown in Figure 19, the right base 22 and the right flap 24 also have the same symmetrical structure.

[0095] In Figure 19, the membrane hinge 31 is in a folded state, and its length L = πR around the inner arc of the upper panel 213 of the left base 21 and the inner arc of the lower panel 234 of the left flip plate 23 (the adjacent inner edges of the left base 21 and the left flip plate 23 together define a semi-cylindrical edge). Due to structural symmetry, as shown in Figure 15, when the membrane hinge 30 is in a flattened state, the distance D1 between the upper edge of the upper panel of the left flip plate 23 and the upper edge of the upper panel of the right flip plate 24 is πR - 2R. If R is 0.8 mm, then D1 is approximately 0.9 mm. In this structure, because the membrane hinge bends and deforms along the semicircle, not only can the left flip plate 23 and the right flip plate 24 fit flat against each other or against their respective bases, but the aforementioned distance D1 is also minimized without excessively affecting the appearance of the piece conversion unit and the entire chessboard. Furthermore, the distance D2 between the midpoints of the inner sides of the third film holder 232 and the fourth film holder 242 in Figure 15 is set to be sufficiently small, for example, about 0.1 mm, so that the film hinge 30 can be kept as flat as possible without loosening. In addition, the radii of the left flap 23 and the right flap 24 can be, for example, 11.25 mm, and the total thickness can be, for example, 4 mm.

[0096] Figures 6 and 7 illustrate a chess set according to another embodiment of the present invention. The chessboard body 10' also has multiple receiving holes 12', in which corresponding chess piece conversion units 20'' are installed. The structure of the chess piece conversion unit 20'' is shown in Figures 8-10, which is similar to the structure of the embodiment shown in Figures 2-5, except that it adopts a top-bottom symmetrical structure.

[0097] Figure 8 is a perspective view of the piece conversion unit 20'' in its default middle position. Figure 9 is a front view of it during the flipping process, and Figure 10 is a corresponding sectional view. The lower structure of the piece conversion unit 20'' is completely symmetrical to the upper structure, that is, the reverse left base 21' is also connected to the reverse left flip plate 23' by a hinge, the reverse right base 22' is also connected to the reverse right flip plate 24' by a hinge, and the reverse left flip plate 23' and the reverse right flip plate 24' are also connected by a hinge.

[0098] In this embodiment, both opposite surfaces of the chessboard body 10' constitute display surfaces, allowing the piece conversion unit 20'' to be manipulated from both sides. Specifically, as shown in FIG9, when the piece conversion unit 20'' is manipulated, for example, by pressing the right flip plate 24 on one side (upper side of the figure) or pressing the reverse left flip plate 23' on the other side (lower side of the figure), the right base 22 and the reverse right base 22', which are connected as one piece, will descend accordingly, while the left base 21 and the reverse left base 21', which are also connected as one piece, will rise simultaneously. During this process, the left flip plate 23 will automatically flip to the right until it is stacked on the right flip plate 24, and the reverse right flip plate 24' will automatically flip to the left until it is stacked on the reverse left flip plate 23'.

[0099] Thus, when the chess piece conversion unit 20'' is in the middle default position shown in Figure 8, the left flip plate 23 and the right flip plate 24 are side by side, the surface 230 of the left flip plate 23 and the surface 240 of the right flip plate 24 are flush with each other, and together with the upper surface or one side display surface of the chessboard body 10, they define the default display pattern; similarly, the reverse left flip plate 23' is also side by side with the reverse right flip plate 24', the surface 230' of the reverse left flip plate 23' and the surface 240' of the reverse right flip plate 24' are flush with each other, and together with the lower surface or the other side display surface of the chessboard body 10', they define the default display pattern. When the piece conversion unit 20'' is in the first conversion position, the right flip plate 24 flips over the left flip plate 23, and the surface 241 of the right flip plate 24 is flush with the surface 220 of the right base 22, thus forming the first piece display pattern together. At this time, the reverse left flip plate 23' flips over to the reverse right flip plate 24', and the surface 231' of the reverse left flip plate 23' is flush with the surface 210 of the reverse left base 21', thus forming the first piece display pattern together. When the piece conversion unit is in the second conversion position, the left flip plate 23 flips over the right flip plate 24, and the surface 231 of the left flip plate 23 is flush with the surface 210 of the left base 21, thus forming the second piece display pattern together. At this time, the reverse right flip plate 24' flips over to the reverse left flip plate 23', and the surface 241' of the reverse right flip plate 24' is flush with the surface 220 of the reverse right base 22', thus forming the second piece display pattern together.

[0100] When the chess set shown in Figure 7 is placed vertically, the players can be positioned on the left and right sides of the chess set. For example, the player playing white is on one side as shown in the figure, and the player playing black is on the other side. Each player can quickly place or capture a piece by pressing the lower flip plate of each piece conversion unit.

[0101] Figures 23-32 show another embodiment of the chess set according to the present invention, wherein a piece conversion unit similar to that shown in Figure 8 is installed in the receiving hole 12 of the chessboard body 10. Figure 23 is a partial perspective view of the chess set, Figure 24 is a corresponding top view, and Figure 25 is a cross-sectional view of one of the piece conversion units. As shown in Figures 23-25, the receiving hole 12 of the chessboard body 10 is provided with a first dividing rib 121 and a second dividing rib 121' extending along the thickness direction of the chessboard body 10. The two are disposed opposite to each other on the inner side of the film hinge 30 along the length direction of the film hinge 30 and protrude radially inward between the left flap 23 and the right flap 24.

[0102] The piece conversion unit shown in Figure 25 has a similar symmetrical structure to the piece conversion unit shown in Figure 15. Figure 26 is a side view of the upper part of the piece conversion unit shown in Figure 25, and Figure 27 is its assembled perspective view. As shown in Figures 25-27, a first thin-film retainer 212 is provided in the left base 21, a second thin-film retainer 222 is provided in the right base 22, a third thin-film retainer 232 is provided in the left flap 23, and a fourth thin-film retainer 242 is provided in the right flap 24. The thin-film hinge 30 is held in place by the third thin-film retainer 232 and the fourth thin-film retainer 242, the thin-film hinge 31 is held in place by the third thin-film retainer 232 and the first thin-film retainer 212, and the thin-film hinge 32 is held in place by the fourth thin-film retainer 242 and the second thin-film retainer 222. In addition, the radially outer regions of the left base 21, right base 22, left flap 23, and right flap 24 are respectively provided with left base fixing wedge 215, right base fixing wedge 225, left flap fixing wedge 235, and right flap fixing wedge 245 that can magnetically attract each other. The left base fixing wedge 215, right base fixing wedge 225, left flap fixing wedge 235, and right flap fixing wedge 245 in the figure adopt the form of magnetic discs with the same shape to simplify installation.

[0103] The upper and lower parts shown in Figure 25 have a symmetrical structure, so the lower structure will not be described further.

[0104] Figure 28 is an exploded perspective view of the upper part of the chess piece conversion unit shown in Figure 27. As shown in Figure 28, the left base 21 is provided with a longitudinal receiving groove 215, and a downward through hole 2150 is provided at the center of the bottom of the receiving groove 215. The through hole 2150 communicates with the circumferential slot 211 of the left base 21 shown in Figure 26. Downward positioning blind holes 2151 are also provided on both sides of the bottom of the receiving groove 215. The first film retainer 212 adopts the form of an insert, with two long elastic retaining legs 2120 formed in the center of the long strip body, and short positioning pins 2121 formed on both sides.

[0105] Figure 29 is a schematic diagram of the assembly of the first film retainer 212 and the film hinge, and Figure 30 is a schematic diagram of the partitioning of the film hinge. As shown in Figure 30, the film hinges 30, 31, and 32 in this embodiment are formed by a single film body 300. The film hinges 30, 31, and 32 can have different colors as shown in Figure 30 to match the corresponding display pattern. As shown in Figures 29 and 30, the film body 300 is provided with an array of positioning holes consisting of lateral positioning holes 311 and a central positioning hole 312. The elastic locking leg 2120 and the positioning pin 2121 of the first film retainer 212 pass through the corresponding central positioning hole 312 and lateral positioning hole 311, respectively. After inserting the other film retainers through the film body 300 in the same way, it is as shown on the right side of Figure 28. Next, insert the positioning pin 2121 of the first film retainer 212 into the corresponding positioning blind hole 2151, and insert the elastic locking leg 2120 through the through hole 2150 of the left base 21 to lock into the circumferential locking groove 211. The elongated body of the first film retainer 212 is then received in the longitudinal receiving groove 215 of the left base 21. Then, wedge the left base fixing wedge 215 between the two elastic locking legs 2120 through the circumferential locking groove 211 to securely fix the first film retainer 212 to the left base 21. After fixing the other film retainers to the corresponding bases or flip plates in the same way, it will be as shown in Figure 26 or Figure 27.

[0106] The above structure significantly simplifies the installation of the membrane hinge. Furthermore, the partition ribs maintain a constant distance between the side-by-side flaps or between the side-by-side flaps and the base, effectively preventing rotation and resulting in more even stress distribution on the membrane hinges. In addition, the magnetically attracted fixing wedges ensure a tight fit between the stacked flaps or between the stacked flaps and the base, minimizing any potential unevenness issues that may occur between the side-by-side flaps and the base.

[0107] Figures 31 and 32 also show perspective and sectional views of the five piece conversion units according to the above embodiment, respectively. The rightmost piece conversion unit is in the default middle position, the leftmost piece conversion unit is in a conversion position, and the three middle piece conversion units are in their respective flipping transition positions. As shown in Figures 31 and 32, the flip plate flips around the outer periphery of the corresponding separating ribs. Therefore, the setting of the separating ribs also helps the flip plate to flip smoothly.

[0108] Furthermore, the film hinge, such as the film hinge 30 shown in FIG25, when in the position corresponding to the first separating rib 121 and the second separating rib 121', will be slightly bent outward by being squeezed outward. Since the film hinge also constitutes part of the display pattern, such as black lines, this will be very advantageous to the overall appearance of the corresponding display pattern, as described below with respect to FIG33.

[0109] Figure 33 shows a partial perspective view of the chessboard body described above. As shown in Figure 33, horizontal concave segments 101 and vertical concave segments 102 are formed on the upper surface 14 of the chessboard body 10. Horizontal concave lines 2301 are formed on the surface 230 of the left flap and horizontal concave lines 2401 are formed on the surface 240 of the right flap, both aligned with the horizontal concave segments 101 to form horizontal lines. The vertical concave segments 102 are aligned with the membrane hinge 30 to form vertical lines. Both horizontal and vertical lines can be, for example, black, while other parts forming the upper surface 14 of the chessboard body 10 can be, for example, yellow (see Figure 7). Since the membrane hinge 30 can bend upwards and closer to the upper surface 14 as described above, the vertical concave segments 102 (as well as the horizontal concave segments 101, horizontal concave lines 2301, and horizontal concave lines 2401) can therefore be formed shallower.

[0110] Figure 34 shows several piece switching units in different states, similar to those shown in Figure 25 or Figure 32. Unlike the transmission mechanism shown in Figure 25 (or Figure 2), which consists of a left rack 25, a right rack 26, and a common pinion 27, the transmission mechanism shown in Figure 34 consists of a first gear 271, a second gear 272, a timing belt 273, a left connecting rod 25', and a right connecting rod 26'. A left slider 274 and a right slider 275 are mounted on the timing belt 273 connecting the first gear 271 and the second gear 272, respectively. The left slider 274 and the right slider 275 are connected to the left connecting rod 25' and the right connecting rod 26', respectively. The transmission mechanism shown in Figure 34 provides more precise transmission.

[0111] Figure 35 shows several piece switching units in different states, similar to the piece switching unit shown in Figure 34. The transmission mechanism shown in Figure 35 differs from that shown in Figure 34 in that it includes a central gear 276 driven by a motor 277. The central gear 276 meshes with a first gear 271 and a second gear 272, respectively. Due to the addition of a motor drive, this embodiment can be applied to automated (intelligent) chess sets to achieve automatic switching of the piece switching units.

[0112] Figure 36 shows a cross-sectional view of the chess piece conversion unit with a reverse asynchronous transmission mechanism. As shown in Figure 36, the upper left rack 25a and the lower left rack 25b are integrally formed on the left rack holder, and the upper right rack 26a and the lower right rack 26b are integrally formed on the right rack holder. The left base 21 is connected to the upper left rack 25a, and the left stop base 28 is connected to the lower left rack 25b. The right base 22 is connected to the upper right rack 26a, and the right stop base 29 is connected to the lower right rack 26b. The pinion 27a and the gear 27b are coaxially mounted on the shaft 270. The upper left rack 25a, the upper right rack 26a, and the pinion 27a mesh on the same transmission plane, while the lower left rack 25b, the lower right rack 26b, and the gear 27b mesh on another transmission plane.

[0113] Figure 37 is a schematic diagram of the pinion 27a and the gear 27b mounted on the shaft 270, and Figure 38 is a perspective view of the two gears separated. As shown in Figures 37 and 38, the gear 27b has an annular receiving groove 271b, and bevel teeth 272b are formed on the groove wall of the annular receiving groove 271b. The pinion 27a has an annular flange 271a, on which a conical notch 272a is formed. The annular flange 271a of the pinion 27a is located in the annular receiving groove 271b of the gear 27b, and the bevel teeth 272b extend into the conical notch 272b and can rotate within it by a certain angle, for example, 10 degrees. In this way, the pinion 27a and the gear 27b can rotate together around the shaft 270, but limited relative rotation between them is allowed. The bevel teeth 272b may also be provided with a return spring (not shown) to keep them centered in the conical notch 272.

[0114] The chess piece conversion unit shown in Figure 36 is in the middle default position, while the chess piece conversion unit shown in Figure 39 is in the first conversion position. As shown in Figure 36, at this time, the upper left rack 25a, the upper right rack 26a and the pinion 27a are in a critical meshing state on the front transmission plane, while the lower left rack 25b, the lower right rack 26b and the large gear 27b are in a critical meshing state on the rear transmission plane. The left flap 23 and the right flap 24 are flush with the upper surface of the chessboard body 10, while the left stop base 28 and the right stop base 29 are flush with the lower surface of the chessboard body 10. When the left flap 23 is pressed down, the upper left rack 25a moves down and engages with the pinion 27a, while the lower left rack 25b moves down and disengages from the large gear 27b. When the pinion 27a drives the large gear 27b to rotate, the lower right rack 26b moves up and engages with the large gear 27b, while the upper right rack 26a moves up and disengages from the pinion 27b. Because a certain degree of relative rotation is allowed between the pinion 27a and the large gear 27b as described above, the "jamming" phenomenon that may occur when they engage / disengage with the corresponding racks is effectively avoided.

[0115] Continue pressing down the left flip plate 23. Assuming that the thickness of both the left flip plate 23 and the right flip plate 24 is 4mm and the diameter ratio of the pinion 27a to the gear 27b is 3:5, until the left rack frame drives the left stop base 28 to move down 3mm, the right rack frame will drive the right stop base 29 to move up 5mm. The right flip plate 24 will then flip onto the left flip plate 23 and stick to it, becoming flush with the right base 22 and protruding 1mm from the upper surface of the chessboard body 10, as shown in Figure 39.

[0116] When the piece conversion unit shown in Figure 36 is in the middle default position, if the right flip plate 24 is pressed down, the left flip plate 23 will also flip onto it and become flush with the left base 21, thus protruding from the upper surface of the chessboard body 10.

[0117] When the chess pieces are automated, for example, by using independently controlled motors to drive the left stop base 28 and the right stop base 29 to move up and down respectively, the same piece protrusion effect can be achieved without using the aforementioned reverse asynchronous transmission mechanism.

[0118] Figure 20 shows a partial cross-sectional view of a variant of the symmetrical chessboard shown in Figure 7, showing only two independent piece conversion units. As shown in Figure 20, the (half) chessboard body 10 and the (other half) chessboard body 10' form a completely symmetrical structure and are fastened together to form a complete chessboard body. A transverse mounting rib 120 integrally formed with the chessboard body 10 is provided in the receiving hole 12 of the chessboard body 10, and a transverse mounting rib 120' integrally formed with the chessboard body 10' is provided in the receiving hole 12' of the chessboard body 10'. Threaded holes 1201 and 1201' are formed on the portions of the ribs adjacent to the inner walls of the receiving holes, respectively. Screws 150 and 150' pass through the corresponding threaded holes 1201 and 1201', respectively, to fasten the chessboard body 10 and the chessboard body 10' together.

[0119] Figure 21 is a top view of the chess set shown in Figure 20, with the bases and flaps removed. As shown in Figure 21, a guide groove 122 extending along the thickness direction of the chess set is provided on the inner wall of the receiving hole 12 of the chessboard body 10. A straight guide rib 250 is formed on the left rack 25 (shown as the upper rack), which cooperates with the guide groove 122. In addition, multiple stop shoulders 16 and 19 are formed on the inner wall of the receiving hole 12. These stop shoulders, as described above, are used to limit the stroke of the corresponding bases.

[0120] As shown in Figures 20 and 21, the shaft 270 of the common pinion 27 is held between the corresponding mounting ribs 120 and 120'; the common pinion 27 meshes with the left rack 25 and the right rack 26 respectively. The left rack 25 also has an integrally formed snap-fit ​​element 251, which cooperates with the snap-fit ​​element 214 integrally formed on the left base 21 for quick assembly of the chess piece conversion unit. The right rack 26 and the right base 22, etc., have symmetrical structures, and will not be described in detail here.

[0121] In the chess pieces shown in Figures 20 and 21, the threaded holes 1201, 1201' and the corresponding screws 150, 150' are all located in the receiving holes 12, 12' of the chessboard bodies 10, 10', thus eliminating the need for mounting holes 15 on the display surface of the chessboard body as in the chess pieces shown in Figures 1, 6, and 7. At least due to the coverage of the corresponding bases, no mounting holes or fasteners will be visible on the display surface of the chessboard body of the chess pieces shown in Figures 20 and 21. The chess piece shown in Figure 14 can employ a similar structure, and therefore no mounting holes or fasteners will be visible on the display surface of its chessboard body 10.

[0122] Figure 22 is a schematic diagram of the chess set shown in Figures 20 and 21 in an upright position. Like the chess set shown in Figure 7, players can sit on the left and right sides of the chess set to play. Although not shown, the chess set could be further supported to prevent it from tipping over or overturning during use.

[0123] Figure 11 shows a chess piece conversion unit in an intermediate default state according to another embodiment of the present invention. It is similar to the embodiments shown in Figures 8-10, except that an intermediate flap is added between the corresponding flap and the base, thereby increasing the conversion position to accommodate, for example, chess sets with three chess types. Of course, this embodiment can also add more intermediate flaps to accommodate chess sets with more chess types or be used as a display device such as a picture frame. When used as a display device, each flap and base can serve as a corresponding display panel or support surface to display corresponding patterns or pictures.

[0124] The chess sets described in the above embodiments can be manufactured in various required sizes using suitable methods such as molding or 3D printing, for example, Go boards with a matrix ranging from 9*9 to 19*19. Furthermore, the main body of the chess board can be manufactured in sections and then assembled.

Claims

1. A chess set, comprising a chessboard body and at least one piece conversion unit disposed therein, wherein the at least one piece conversion unit comprises: Left base and left flap connected to it via left hinge; as well as The right base and the right flap connected to it via the right hinge, The left and right flaps are connected to each other by a central hinge, and one of the left and right bases is linearly movable relative to the other along the thickness direction of the chessboard body.

2. The chess set according to claim 1, wherein the left and right flip plates have the same flip plate thickness and are arranged flush with each other on the corresponding left and right bases by default, and both the left and right bases are linearly movable relative to the main body of the chessboard.

3. The chess set according to claim 2, wherein the left base and the right base are connected by a transmission mechanism such that when one of them is moved relative to the chessboard body, the other of them is moved in the opposite direction relative to the chessboard body.

4. The chess set according to claim 3, wherein the transmission mechanism is configured such that the distance by which one of the left base and the right base is displaced inward relative to the chessboard body is always equal to the distance by which the other of the left base and the right base is displaced outward relative to the chessboard body.

5. The chess set according to claim 3, wherein the transmission mechanism is configured such that when one of the left base and the right base moves inward by a first predetermined distance relative to the chessboard body, the other of the left base and the right base moves outward by a second predetermined distance relative to the chessboard body so that one of the left flip plates and the right flip plates, which are arranged horizontally on each other by default, flips outward and is stacked on the other of the left flip plate and the right flip plate, wherein the first predetermined distance is less than the thickness of the flip plate, the second predetermined distance is greater than the thickness of the flip plate, and the sum of the two is equal to twice the thickness of the flip plate.

6. The chess set according to claim 3, wherein both the left base and the right base are further connected to a reverse stop, and the two are arranged flush with each other by default.

7. The chess set according to claim 1, wherein the main body of the chessboard has a display surface, the left base has a first chess piece surface, the right base has a second chess piece surface, the left flip panel has a default surface and a reversed first chess piece surface, and the right flip panel has a default surface and a reversed second chess piece surface. When they are aligned with each other, the first chess piece surface and the reversed first chess piece surface constitute a first chess piece pattern, and the second chess piece surface and the reversed second chess piece surface constitute a second chess piece pattern. The two default surfaces of the left and right flip panels, together with the display surface of the main body of the chessboard, define the default pattern.

8. The chess set according to claim 1, wherein the at least one piece conversion unit further comprises: The reverse left base and the reverse left flap connected to it via the reverse left hinge; and The reverse right base and the reverse right flap connected to it via the reverse right hinge. The reverse left flap and the reverse right flap are connected to each other by a reverse middle hinge. The left base and the reverse left base are connected as one unit, and the right base and the reverse right base are also connected as one unit.

9. The chess set according to claim 8, wherein the main body of the chessboard further has a reverse display surface, the reverse left base has a second chess piece surface, the reverse right base has a first chess piece surface, the reverse left flip plate has a default surface and a reverse second chess piece surface, and the reverse right flip plate has a default surface and a reverse first chess piece surface. When they are aligned with each other, the first chess piece surface of the reverse right base and the reverse first chess piece surface of the reverse right flip plate constitute a first chess piece pattern, the second chess piece surface of the reverse left base and the reverse second chess piece surface of the reverse left flip plate constitute a second chess piece pattern, and the two default surfaces of the reverse left flip plate and the reverse right flip plate together define the default pattern with the reverse display surface of the main body of the chessboard.

10. The chess set according to claim 1, wherein each hinge is a film hinge made of an independent film or composed of different portions of the same film.

11. The chess set according to claim 10, wherein each film hinge is configured to bend and unfold around the rounded inner edge of the corresponding flap or base.

12. The chess set according to claim 1, wherein the left base, left flip plate, right flip plate and right base are arranged to be magnetically attracted to each other in sequence.

13. The chess set according to claim 1, wherein the chessboard body defines at least one receiving hole for accommodating the at least one chess piece conversion unit, and the inner wall of the at least one receiving hole is provided with a longitudinal dividing rib, the longitudinal dividing rib protruding inside the intermediate hinge between the left and right flip plates that are arranged flush with each other by default.

14. The chess set according to claim 13, wherein two opposing longitudinal dividing ribs are provided on the inner wall of the at least one receiving hole.

15. The chess set according to claim 1, which is a Go or Gomoku chess set having two types of pieces, wherein the at least one piece conversion unit comprises a plurality of piece conversion units forming an array.

Images