Entertainment appliances

Abstract

The present invention relates to the field of entertainment. The entertainment appliance provided includes a base body and an article. The base body has an identification position, and the article is detachably fitted to the identification position in a preset posture. The article has a permanent magnet, and a magnetic sensor is provided at a position corresponding to the identification position on the base body. The magnetic sensor can be used to detect the direction of the magnetic field at its location. For the same identification position, when an article is fitted to the identification position, the direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor is the first direction, and the first directions corresponding to any two articles are all different. Each identification position of the present invention only needs to be provided with one magnetic sensor to realize the identification of the type of article at the identification position, which is beneficial to reducing the types and quantities of sensors and simplifying the structure of the entertainment appliance.

Description

Technical Field

[0001] The present invention relates to the field of entertainment, and particularly to an entertainment appliance. Background Art

[0002] An electronic chessboard combines the advantages of an offline physical chessboard and an online APP chessboard. It can not only provide users with the experience of a physical chessboard but also apply various intelligent gameplay in the APP. It is widely used in application scenarios such as remote teaching and single-player challenges.

[0003] Taking Chinese chess / chess as an example, common electronic chessboards include the following two types:

[0004] In one solution, Hall sensors are set on the chessboard and permanent magnets are set on the chess pieces. The way of using Hall sensors to sense permanent magnets is adopted to sense whether there are chess pieces at the chess dropping positions, and the types of corresponding chess pieces are determined by the chess playing rules and the way of memorizing the chess playing trajectories. Relevant publicly disclosed patent documents are such as CN101721804B, CN201889059U, CN205042085U, CN205730273U, CN105709409A.

[0005] In another solution, technologies such as radio frequency identification, optical identification, and magnetic coding arrays are additionally used to identify the types of chess pieces. For example, CN102872586B uses optical coding to identify the types of chess pieces, CN111617462A / CN202983151U uses radio frequency technology to identify the types of chess pieces, CN2523473Y uses reflective light to identify the types of chess pieces, and CN110478887A uses the way of magnetic coding arrays to identify the types of chess pieces.

[0006] In addition, the Chinese patent application with the publication number CN106405454A discloses a magnetic angle sensing system. This published document detects the angular position of a magnet by sensing the magnetic field of the magnet through a magnetic angle sensor, and Figure 1 and Figure 4 shows two different relative position relationships between the magnetic angle sensor and the magnet respectively.

[0007] For the solution of determining the types of corresponding chess pieces by the chess playing rules and the way of memorizing the chess playing trajectories, this solution is often only applicable to the case where the initial positions of the chess pieces are determined. On the one hand, this greatly restricts the user's use of the electronic chessboard, resulting in the user being unable to independently place the endgame, and on the other hand, this solution is also not applicable to chess types where the initial positions of the chess pieces are uncertain.

[0008] For solutions that additionally use technologies such as radio frequency identification, optical identification, and magnetic coding arrays to identify the types of chess pieces, such solutions require several times the number of sensors as the number of chess placement positions. With a relatively large number of sensors, the cost of the electronic chessboard is high and the structure is relatively complex. For example, in a radio frequency identification solution, magnetic sensors are often required to sense whether a chess piece is at a chess placement position. Under each chess placement position, both a radio frequency identification module and a magnetic sensor need to be set. The large number of sensors / identification modules used in such an electronic chessboard results in a high cost and a relatively complex structure of the electronic chessboard. Summary of the Invention

[0009] The object of the present invention is to overcome the above-mentioned defects of the prior art and provide a recreational article that can identify the type of item, uses fewer sensors, and has a simple structure.

[0010] The recreational article provided by the present invention includes a base body and an item. The base body has an identification position, and the item is detachably fitted to the identification position in a preset posture. At most one item is fitted to the same identification position at the same time. The item has a permanent magnet, and a magnetic sensor is provided at a position corresponding to the identification position on the base body. The magnetic sensor can be used to detect the direction of the magnetic field at its location. For the same identification position, when an item is fitted to the identification position, the direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor is the first direction, and the first directions corresponding to any two items are different; or the magnetic sensor can be used to detect the component direction of the magnetic field at its location on a preset plane. For the same identification position, when an item is fitted to the identification position, the component direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor on the preset plane is the second direction, and the second directions corresponding to any two items are different.

[0011] As can be seen from the above, the recreational article of the present invention can identify the type of item fitted to the corresponding identification position according to the direction of the magnetic field detected by the magnetic sensor, and the identification of the item type is accurate. Moreover, for each identification position of the present invention, only one magnetic sensor needs to be correspondingly set to achieve the identification of the type of item fitted to the identification position, which is beneficial to reducing the type and number of sensors and simplifying the structure of the recreational article. Especially in the solution where the second directions corresponding to any two items are different, a two-axis magnetic sensor can be selected to detect each second direction and identify the item type according to the detected second direction. In this way, the present invention can use the same magnetic sensor as the widely used magnetic knob, that is, the present invention can use existing general magnetic sensors to achieve the identification of item types, which is beneficial to improving the universality of magnetic sensors, reducing the use cost of magnetic sensors, and improving the economy of the recreational article.

[0012] A two-axis magnetic sensor, that is, a magnetic sensor that can detect the magnetic field components in two mutually perpendicular directions, so as to detect the components parallel to the plane of the two directions.

[0013] It should be noted that, unless otherwise specified, the direction of the magnetic field described in the present invention may refer to the vector direction of the magnetic field or a straight line direction parallel to the magnetic field vector.

[0014] A preferred solution is that the cooperation between the base and the article has a positioning structure, which restricts the article in a preset posture at the recognition position and restricts the relative rotation of the article with respect to the base.

[0015] A further solution is that the positioning structure includes a concave-convex mating structure; and / or the positioning structure includes a magnetic positioning structure.

[0016] Another preferred solution is that the entertainment device is a chess set, the chessboard of the chess set is the base, the chess pieces of the chess set are the articles, and the chess placement position on the chessboard is the recognition position; or the entertainment device is an educational stationery, the article is a movable block representing a letter, or the article is a movable block representing a number / operator.

[0017] As can be seen from the above, in the solution where the entertainment device is a chess set, the chess placement position is the position on the chessboard for placing chess pieces during the normal chess-playing process. In this way, the chess set of the present invention can realize online and offline collaborative chess-playing after being connected to the network / APP, enabling both the experience of a physical chessboard and remote chess-playing. For example, it can be used for online chess-playing and online teaching with a physical chessboard. Moreover, the chess set of the present invention can identify the types of chess pieces without relying on the rules of chess-playing and memorizing the trajectories of chess moves. Therefore, on the one hand, the present invention can be applied to chess games where the initial positions of the chess pieces are uncertain, such as military chess, and the applicable chess games of the present invention are more extensive. On the other hand, the present invention can also be applied to endgame chess-playing / teaching, etc., which is beneficial to expanding the applicable range and flexibility of the chess set.

[0018] In the solution where the entertainment device is an educational stationery, the entertainment device of the present invention can be used to help children learn foreign languages / pinyin / arithmetic after combining operation processing and voice broadcast / digital display. Compared with learning methods using tablet computers, etc., this method is not only beneficial to increasing children's interest in learning foreign languages / pinyin / arithmetic itself and enabling children to learn happily, but also can prevent children from coming into contact with computers / mobile phones too early and being addicted to the virtual world of computers / mobile phones, which is beneficial to the healthy growth of children.

[0019] Another preferred solution is that the entertainment device includes a magnetic induction switch provided on the base and an induction magnet provided on the article. The magnetic induction switch corresponds to the recognition position. When the magnetic induction switch is triggered by the induction magnet, it is determined that the corresponding recognition position is cooperated with an article.

[0020] As can be seen from the above, such entertainment utensils can sense whether an item is matched with the corresponding identification position by whether the magnetic induction switch is triggered. In this way, the entertainment utensils of the present invention can start detecting the type of the item only when an item is matched with the detected corresponding identification position, avoiding obtaining incorrect detection results. Moreover, after combining with the subsequent status prompt unit, when there is an abnormally matched item at the identification position, the operator can obtain a prompt from the status prompt unit, so that the item can be placed in a state of being matched with the corresponding identification position through the operation of the operator.

[0021] A further solution is that the identification position corresponds to a first visible identifier, and the item is provided with a second visible identifier. The combination of the second visible identifier of the item and the corresponding first visible identifier indicates that the item is in a matching state with the corresponding identification position.

[0022] As can be seen from the above, in this way, the operator can match the item with the identification position according to the correspondence between the first visible identifier and the second visible identifier.

[0023] Another preferred solution is that the direction from the south pole to the north pole of the permanent magnet is the fourth direction. For the same identification position, when each item is matched with this identification position, the fourth direction of the corresponding permanent magnet is perpendicular to the third direction, and the fourth directions corresponding to any two items are different.

[0024] As can be seen from the above, when the item is matched with this identification position, the directions of the magnetic fields at the positions directly opposite to the central position of the permanent magnet along the third direction are all perpendicular to the third direction, that is, the directions of the magnetic fields at the positions directly opposite to the central position of the permanent magnet along the third direction are all in the same plane. Therefore, at this time, the magnetic sensor can be arranged on one side of the permanent magnet along the third direction, and the plane perpendicular to the third direction is used as the preset plane. The two-axis magnetic sensor is used to detect the component direction of the magnetic field on this preset plane, and the type of the item at the corresponding identification position is identified according to the direction of the magnetic field detected by the two-axis magnetic sensor. On the one hand, the present invention can use the same magnetic sensor as the widely used magnetic knob, that is, the present invention can realize the identification of the type of the item by using the existing general magnetic sensor, which is beneficial to improving the universality of the magnetic sensor, reducing the use cost of the magnetic sensor, and improving the economy of the entertainment utensils. On the other hand, since the direction of the magnetic field at the magnetic sensor is along the plane (preset plane) perpendicular to the third direction at this time, the magnitude of the component of the magnetic field in the third direction is almost zero, so that the identification accuracy will not decrease due to ignoring the magnetic field component perpendicular to the preset plane, which is beneficial to improving the accuracy of using the two-axis magnetic sensor to detect and identify the type of the item in the present invention.

[0025] A further solution is that the magnetic sensor is a three-axis magnetic sensor, which can be used to detect the magnitude of the magnetic field. The central position of the permanent magnet of the article is directly opposite to the corresponding magnetic sensor along the third direction. When the magnitude of the component of the magnetic field detected by the magnetic sensor in the third direction is greater than or equal to a preset first threshold, it is determined that the corresponding identification bit is abnormally matched with the article; or when the included angle between the direction of the magnetic field detected by the magnetic sensor and the third direction exceeds a preset included angle range, it is determined that the corresponding identification bit is abnormally matched with the article.

[0026] As can be seen from the above, when the article is fitted to the identification bit, the fourth direction is perpendicular to the third direction, and since the central position of the corresponding magnetic sensor and the corresponding permanent magnet are directly opposite in the third direction, theoretically, the direction of the magnetic field at the magnetic sensor should be perpendicular to the third direction, and the magnitude of the component of the magnetic field at the magnetic sensor in the third direction should be zero; on this basis, considering the allowable error in the fitting of the article and the identification bit, in practice, the magnitude of the component of the magnetic field detected by the magnetic sensor in the third direction will also be significantly smaller than the magnitude of the component of the magnetic field perpendicular to the third direction, and the included angle between the magnetic field detected by the magnetic sensor and the third direction will approach 90°. Therefore, if the included angle between the magnetic field detected by the magnetic sensor and the third direction deviates too far from 90° (for example, deviates more than 5°), or the magnitude of the component of the magnetic field detected by the magnetic sensor in the third direction is too large (greater than or equal to a preset first threshold), it indicates that the article at the corresponding identification bit is abnormally matched with the corresponding identification bit at this time.

[0027] When the article and the identification bit are abnormally matched, there may be a large difference between the direction of the magnetic field detected by the magnetic sensor and the first direction corresponding to the corresponding article. At this time, the recognition result of the article type may be incorrect. Therefore, the present invention also detects whether the article and the identification bit are abnormally matched, which helps to reduce the risk of using the detection result of the magnetic sensor when the article and the identification bit are abnormally matched for article type recognition, and reduces the risk of misidentifying the article type due to the abnormal matching of the article and the identification bit.

[0028] In addition, the magnetic sensor of the present invention is used both to detect whether the article and the identification bit are abnormally matched and to identify the type of the article. In this way, this solution does not require an additional sensor to detect whether the article and the identification bit are abnormally matched, which helps to reduce the number of sensors, simplifies the structure of this solution, and improves the economy of this solution.

[0029] The state of abnormal matching between the article and the identification bit can be, for example, that the position of the article is offset compared to the position when it is matched with the identification bit, or the attitude of the article is tilted compared to the attitude when it is matched with the identification bit.

[0030] It should be noted that, regarding the relevant expressions of the cooperation between the article and the identification bit, and the article being fitted to the identification bit, unless otherwise specified as the meaning of abnormal cooperation or being in an abnormal cooperation state, it refers to the cooperation state when the article and the corresponding identification bit can identify the type of article through the corresponding magnetic sensor.

[0031] A further solution is that when the included angle between the direction of the magnetic field detected by the magnetic sensor and the third direction exceeds the preset included angle range, and the magnitude of the magnetic field detected by the magnetic sensor is greater than or equal to the preset second threshold, it is determined that the corresponding identification bit and the article are abnormally cooperated.

[0032] As can be seen from the above, this can avoid misjudging that there is an article in cooperation with the corresponding identification bit due to the magnetic sensor detecting other irrelevant magnetic fields, or misjudging that there is an article with abnormal cooperation at the corresponding identification bit.

[0033] A further solution is that the entertainment appliance further includes a status prompt unit, and the status prompt unit is communicatively connected to the magnetic sensor; when it is determined that the identification bit and the article are abnormally cooperated, the corresponding status prompt unit issues a prompt message.

[0034] As can be seen from the above, in this way, when the identification bit and the article are abnormally cooperated, the operator can obtain feedback from the status prompt unit, which is beneficial for the operator to grasp whether the article and the identification bit are abnormally cooperated, and is beneficial for improving the user experience.

[0035] A further solution is that it includes a status detection unit, and the status detection unit includes a magnetic induction switch provided on the base body and an induction magnet provided on the article. The magnetic induction switch corresponds to the identification bit, and when the magnetic induction switch is triggered by the induction magnet, it is determined that there is an article in cooperation with the corresponding identification bit.

[0036] As can be seen from the above, an additional status detection unit is provided to detect whether the article and the identification bit are abnormally cooperated.

[0037] A further solution is that the magnetic sensor can be used to detect the vector direction of the magnetic field at its location, the first direction is the vector direction, and the second direction is the vector direction; or the magnetic sensor can be used to detect the linear direction of the magnetic field at its location, the first direction is the linear direction, and the second direction is the linear direction.

[0038] A further solution is that the magnetic sensor includes a magnetic sensing chip.

[0039] A further solution is that the magnetic sensor is a two-axis magnetic sensor; in this way, the present invention can use the same magnetic sensor as the widely used magnetic knob, that is, the present invention can achieve the identification of the article type by using the existing general magnetic sensor, which is beneficial for improving the universality of the magnetic sensor, beneficial for reducing the use cost of the magnetic sensor, and beneficial for improving the economy of the entertainment appliance.

[0040] A further solution is that the article is detachably fitted to the corresponding identification position along the third direction.

[0041] A further solution is that the base body has a first mating surface at the identification position, the article has a second mating surface, the first mating surface fits with the corresponding second mating surface of the article, and the normal lines of the first mating surface and the corresponding second mating surface of the article are both along the third direction.

[0042] Another preferred solution is that the magnetic sensor detects the actual direction of the magnetic field, and the entertainment device uses the type of article corresponding to the first direction that matches the actual direction as the type of article that fits with the corresponding identification position; the magnetic sensor detects the actual component direction of the magnetic field in the preset plane, and the entertainment device uses the type of article corresponding to the second direction that matches the actual component direction as the type of article that fits with the corresponding identification position.

[0043] Another preferred solution is that for the same identification position, when an article is fitted to the identification position, the possible range of the magnitude of the magnetic field detected by the corresponding magnetic sensor is the first preset magnitude interval, and the possible range of the direction of the magnetic field detected by the corresponding magnetic sensor is the first preset direction interval; when the actual direction and actual magnitude of the magnetic field detected by the magnetic sensor are successively within the first preset direction interval and the first preset magnitude interval corresponding to the same type of article, the entertainment device determines that an article is fitted to the identification position and determines that the article at the corresponding identification position belongs to the type of article corresponding to the interval where the actual direction and actual magnitude are located.

[0044] Another preferred solution is that for the same identification position, when an article is fitted to the identification position, the possible range of the magnitude of the component of the magnetic field detected by the corresponding magnetic sensor in the preset plane is the second preset magnitude interval, and the possible range of the direction of the component of the magnetic field vector detected by the corresponding magnetic sensor in the preset plane is the second preset direction interval; when the actual component direction and actual component magnitude of the magnetic field detected by the magnetic sensor are successively within the second preset direction interval and the second preset magnitude interval corresponding to the same type of article, the entertainment device determines that an article is fitted to the identification position and determines that the article at the corresponding identification position belongs to the type of article corresponding to the interval where the actual component direction and actual component magnitude are located.

[0045] As can be seen from the above, judging whether an article is fitted to the identification position and obtaining the type of the article fitted to the identification position according to the magnitude and direction of the magnetic field detected by the magnetic sensor is beneficial to improving the accuracy of the entertainment device in identifying the type of article.

[0046] A further solution is that the entertainment device has a status prompt unit corresponding to the identification bit, and the status prompt unit is communicatively connected to the corresponding magnetic sensor; when it is determined that an item is fitted at the identification bit, the corresponding status prompt unit prompts that the status is normal; and / or when the actual size / actual component size is greater than or equal to a preset second threshold and it is not determined that an item is fitted at the identification bit, the corresponding status prompt unit prompts that the status is abnormal.

[0047] As can be seen from the above, it is beneficial for the operator to intuitively grasp whether the item and the identification bit are abnormally fitted.

[0048] A further solution is that the status prompt unit is a status indicator light / sound prompt device; when it is determined that an item is fitted at the identification bit, the corresponding status prompt unit prompts the first normal state; when the actual size / actual component size is less than the second threshold, the corresponding status prompt unit prompts the second normal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a partial structural diagram of the first embodiment of the entertainment device of the present invention.

[0050] Figure 2 is a partial structural exploded view of the first embodiment of the entertainment device of the present invention.

[0051] Figure 3 is a cross-sectional view of the cooperation between the chess piece and the chess placement position in the first embodiment of the entertainment device of the present invention.

[0052] Figure 4 is a schematic diagram of the chess piece "Red Commander" in the first embodiment of the entertainment device of the present invention.

[0053] Figure 5 is a schematic diagram of the chess piece "Red Advisor" in the first embodiment of the entertainment device of the present invention.

[0054] Figure 6 is a schematic diagram of the chess piece "Red Elephant" in the first embodiment of the entertainment device of the present invention.

[0055] Figure 7 is a cross-sectional view of the cooperation between the chess piece and the chess placement position in the alternative solution of the second embodiment of the entertainment device of the present invention.

[0056] Figure 8 is a top view schematic diagram of the second embodiment of the entertainment device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] First Embodiment

[0058] In this embodiment Figures 1 to 7 A unified spatial rectangular coordinate system (right-handed system) is adopted to represent the relative positional relationship between the features of this embodiment, where the positive direction of the Z-axis is vertically upward.

[0059] The entertainment device in this embodiment is a Chinese chess. Please refer to Figure 1 and Figure 2 . The Chinese chess includes a chessboard 1 (an example of the base) and chess pieces 2 (an example of the articles). The chessboard 1 includes a bottom shell 11, a panel 13, and a circuit board 12. The panel 13 is located on the upper side (the positive Z-axis side) of the bottom shell 11. The bottom shell 11 and the panel 13 enclose an installation cavity 14, and the circuit board 12 is fixed in the installation cavity 14.

[0060] Please refer to Figure 1 and Figure 2 . The upper main surface of the panel 13 is a working surface 131. The normal line of the working surface 131 is along the vertical direction (an example of the third direction). There are nine columns of chess-piece placement positions (an example of the identification positions) distributed along the X-axis direction on the working surface 131. Each column of chess-piece placement positions has ten distributed along the Y-axis direction. A total of ninety chess-piece placement positions are arrayed in a ten-row and nine-column manner.

[0061] The chess pieces 2 include a red general 2a (see Figure 4 ), red advisors 2b (see Figure 5 ), red elephants 2c (see Figure 6 ), red horses, red chariots, red cannons, red pawns, black generals, black advisors, black elephants, black horses, black chariots, black cannons, and black pawns, a total of fourteen types. The chess pieces 2 can be detachably fitted into the chess-piece placement positions on the chessboard 1. The content and color of the marks such as "general" and "advisor" on the chess pieces 2 are the visible type identifiers of the chess pieces 2.

[0062] There are ninety magnetic sensors 121 arrayed in a ten-row and nine-column manner on the circuit board 12. Each magnetic sensor 121 corresponds to each chess-piece placement position one by one. The magnetic sensor 121 is located directly below the corresponding chess-piece placement position, that is, the magnetic sensor 121 is located on the negative Z-axis side of the corresponding chess-piece placement position.

[0063] The magnetic sensor 121 in this embodiment is a two-axis magnetic sensor. The two-axis magnetic sensor can detect the vector components of the magnetic field vector in two mutually perpendicular directions, so as to be able to detect the direction of the magnetic field vector on a preset plane. In this solution, the magnetic sensor 121 can be used to detect the direction of the magnetic field vector on the XOY plane where it is located. The magnetic sensor 121 can detect the vector components of the magnetic field in the X-axis direction and the Y-axis direction, so as to be able to calculate the direction of the vector component of the magnetic field vector at the magnetic sensor 121 on the XOY plane. Specifically, the magnetic sensor 121 in this embodiment includes a magnetic sensing chip. The magnetic sensing chip is usually also called a magnetic encoding chip, a magnetic encoder chip, a magnetic encoding chip, a magnetic angle sensor, etc. For example, the magnetic angle sensors in the invention patent applications with publication numbers CN109855668A and CN106405454A, and for another example, the magnetic encoding chip in the utility model patent with publication number CN206455664U.

[0064] The cooperation between the chess piece 2 and the chess placement position is provided with a positioning structure. The positioning structure limits the chess piece 2 in the corresponding chess placement position in a preset posture (for example Figure 1 the posture shown), and the positioning structure restricts the rotation of the chess piece 2 relative to the chessboard 1; specifically, the cross-sectional contour shape of the normal line of the chess piece 2 along the vertical direction is a circle with a flat cut, and the flat cut of the chess piece 2 is located at the negative end of the Y-axis. Each chess placement position is provided with a groove 132. The cross-sectional contour shape of the normal line of the groove 132 along the vertical direction is a circle with a flat cut. The cross-sectional contour of the normal line of the groove 132 along the vertical direction matches the cross-sectional contour of the normal line of the chess piece 2 along the vertical direction. When the chess piece 2 is placed in the groove 132, its cooperation with the corresponding chess placement position is realized, and the groove 132 restricts the rotation of the chess piece 2 relative to the chessboard 1.

[0065] The groove 132 and the flat cut of the chess piece 2 constitute the positioning structure of this embodiment. Optionally, in other embodiments of the present invention, the positioning structure can also be an uneven matching structure of other shapes.

[0066] The bottom surface of the groove 132 is the first mating surface, and the bottom surface of the chess piece 2 is the second mating surface. Both the first mating surface and the second mating surface corresponding to the chess piece 2 are planes with normal lines along the vertical direction. The second mating surface of the chess piece 2 fits with the first mating surface of the corresponding groove 132, which is beneficial to improving the cooperation stability between the chess piece 2 and the chess placement position.

[0067] Optionally, in other embodiments of the present invention, the positioning structure can also adopt a magnet positioning structure. The scheme of the magnet positioning structure can be set with reference to the prior art. For example, it can be set with reference to the magnet positioning and adsorption structure in the utility model patent with the publication number of CN210582466U.

[0068] Please refer to Figure 3 , the chess piece 2 is internally provided with a permanent magnet 21. For example Figure 4 the permanent magnet 21a of the "Red Commander" 2a shown, Figure 5 the permanent magnet 21b of the "Red Advisor" 2b shown and Figure 6 the permanent magnet 21c of the "Red Elephant" 2c shown, etc. When the chess piece 2 is fitted to the chess placement position, the corresponding magnetic sensor 121 is located directly below the chess piece 2. Preferably, the corresponding magnetic sensor 121 is located directly below the center position of the permanent magnet 21 of the chess piece 2. The direction from the south pole to the north pole of the permanent magnet 21 is the fourth direction A. The fourth direction A of each permanent magnet 21 is perpendicular to the vertical direction, that is, the fourth direction A of each permanent magnet 21 is along the horizontal direction.

[0069] For the same chess placement position, the fourth direction A corresponding to each chess piece 2 of the same type is the same when cooperating with the chess placement position, and there are differences between the fourth direction A corresponding to any two chess pieces 2 when cooperating with the chess placement position. Please refer to Figures 4 to 6, for example, the fourth direction A1 corresponding to the "Red Marshal" 2a is the same as the positive direction of the X-axis. The rotation angle of the fourth direction A2 corresponding to the "Red Advisor" 2b rotated counterclockwise to the positive direction of the X-axis is 25°. The rotation angle of the fourth direction A3 corresponding to the "Red Elephant" 2c rotated counterclockwise to the positive direction of the X-axis is 50°... and so on. There is at least a 25° angle between the fourth directions A corresponding to any two pieces 2.

[0070] Correspondingly, for the same piece-placement position, when a piece 2 is placed at this piece-placement position, the vector direction of the magnetic field generated by the corresponding permanent magnet 21 at the corresponding magnetic sensor 121 is the first direction B. The first directions B corresponding to the same type of pieces 2 are the same. There is an angle between the first directions B corresponding to any two pieces 2, that is, the first directions B corresponding to each type of piece 2 are different from each other.

[0071] Similarly, since in this embodiment, the fourth direction A of each permanent magnet 21 is set to be perpendicular to the vertical direction, and the central position of the permanent magnet 21 and the corresponding magnetic sensor 121 are set to face each other along the vertical direction. Therefore, at this time, the magnetic field vector direction at the magnetic sensor 121 is parallel to the XOY plane, and the magnetic field vector direction at the magnetic sensor 121 is the same as the component direction of this magnetic field vector in the XOY plane. Therefore, for the same piece-placement position, if the vector component direction of the magnetic field generated by the corresponding permanent magnet 21 at the corresponding magnetic sensor 121 when the piece 2 is placed at this piece-placement position in the XOY plane (an example of the preset plane) is set as the second direction, then the second directions corresponding to the same type of pieces 2 are the same. There is an angle between the second directions corresponding to any two pieces 2, that is, the second directions corresponding to each type of piece 2 are different from each other.

[0072] Therefore, this embodiment can identify the type of the piece 2 at the corresponding piece-placement position according to the component direction of the magnetic field vector detected by the magnetic sensor 121 in the XOY plane. Specifically, the magnetic sensor 121 in this embodiment detects the actual component direction of the magnetic field vector at its position in the XOY plane, and the Chinese chess takes the type of the piece corresponding to the second direction that matches this actual component direction as the type of the piece 2 that matches the corresponding piece-placement position. Optionally, in other embodiments of the present invention, a three-axis magnetic sensor can also be used to replace the two-axis magnetic sensor in this embodiment. The magnetic sensor 121 in this solution detects the actual direction of the magnetic field vector, and the Chinese chess takes the type of the piece corresponding to the first direction B that matches this actual direction as the type of the piece that matches the corresponding piece-placement position.

[0073] For example, in this embodiment, the first direction / second direction corresponding to the "Red Commander" 2a is along the negative X-axis, that is, the opposite direction of the fourth direction A1 corresponding to the "Red Commander" 2a. The first direction / second direction corresponding to the "Red Advisor" 2b in this embodiment is along the opposite direction of the corresponding fourth direction A2, and so on. When the corresponding magnetic sensor 121 detects that the magnetic field vector direction is along the negative X-axis, it can determine that the corresponding chess piece 2 is the "Red Commander" 2a. When the corresponding magnetic sensor 121 detects that the magnetic field vector direction is along the opposite direction of the fourth direction A2, it can determine that the corresponding chess piece 2 is the "Red Advisor" 2b. Of course, considering installation and manufacturing errors, it is also possible to determine that the corresponding chess piece 2 is the "Red Commander" 2b when the magnetic sensor 121 detects that the included angle between the magnetic field vector direction and the negative X-axis is within ±5°. This allows for a slight position and angle deviation in the matching between the chess piece 2 and the chess piece placement position, and the matching between the chess piece 2 and the groove 132 can be set as a loose fit, which is beneficial to improving the user's chess-playing experience.

[0074] The magnetic sensor 121 in this embodiment can adopt a two-axis magnetic sensor in an existing magnetic knob. By detecting the vector component direction of the magnetic field vector in the XOY plane with the two-axis magnetic sensor, the type of the chess piece 2 can be identified accordingly. This is beneficial to improving the versatility of the magnetic sensor 121, beneficial to improving the economy of the chess in this embodiment. Moreover, the magnetic sensor technology of the existing magnetic knob is mature, which is beneficial to improving the accuracy of identifying the type of the chess piece.

[0075] The central position of the permanent magnet 21 is directly opposite to the corresponding magnetic sensor 121 in the vertical direction, that is, the straight line passing through the central position of the permanent magnet 21 and along the vertical direction passes through the corresponding magnetic sensor 121.

[0076] Of course, in other embodiments of the present invention, even if the fourth direction A of the permanent magnet 21 is not perpendicular to the vertical direction, or the permanent magnet 21 and the corresponding magnetic sensor 121 are not directly opposite in the vertical direction, for the same chess piece placement position, as long as the component directions of the corresponding first direction B of any two chess pieces 2 in the matching with this chess piece placement position in the corresponding preset plane are different, that is, the corresponding second directions of any two chess pieces 2 in the matching with this chess piece placement position are different, the type of the chess piece 2 on the corresponding chess piece placement position can be identified according to the vector component direction of the magnetic field detected by the magnetic sensor 121 in this preset plane, and the magnetic sensor 121 can be set as a two-axis magnetic sensor. Of course, in the solution of this embodiment, since the magnetic field vector directions of each permanent magnet 21 at the corresponding magnetic sensor 121 are generally along the horizontal direction (the second direction is exactly the same as the corresponding first direction B), the vector component of the magnetic field vector in the vertical direction can be ignored, and it is not easy to cause detection errors. Therefore, it is more beneficial to accurately identify the type of the chess piece 2 according to the detection signal of the two-axis magnetic sensor.

[0077] Optionally, in other embodiments of the magnetic sensor of the present invention that adopt a three-axis magnetic sensor, the fourth direction A of the magnetic sensor 121 may not be perpendicular to the vertical direction either, and the magnetic sensor 121 may also be staggered from the projection space of the permanent magnet 21 in the vertical direction. As long as the corresponding relationship between the first direction B corresponding to each chess piece 2 and the various types of the chess piece 2 can be ensured, the type of the chess piece 2 at the corresponding chess placement position can be identified according to the direction of the magnetic field vector detected by the magnetic sensor 121.

[0078] Since this embodiment can detect the types of the chess pieces 2, the chess of this embodiment can be applied to the endgame practice that realizes the online and offline linkage, which is beneficial to expanding the applicable range of the chess of this embodiment and facilitating the user to freely use the chess of this embodiment; moreover, only one magnetic sensor 121 needs to be correspondingly arranged at each chess placement position in this embodiment to realize the identification of the type of the chess piece 2, which is beneficial to simplifying the structure of the chess.

[0079] Furthermore, although the foregoing solution can identify the type of the chess piece 2 through the detection result of the corresponding magnetic sensor 121 when the chess piece 2 and the chess placement position are in a matching state, however, when the cooperation between the chess piece 2 and the chess placement position is abnormal (for example, the position of the chess piece 2 is offset compared with the position when it is in cooperation with the chess placement position, or the posture of the chess piece 2 is inclined compared with the posture when it is in cooperation with the chess placement position), it may be incorrect to identify the type of the chess piece 2 through the detection result of the magnetic sensor 121. Therefore, preferably, the magnetic sensor 121 of this embodiment can detect the magnitude of the magnetic field vector, and the chess of this embodiment jointly identifies the type of the chess piece 2 according to the magnitude and direction of the magnetic field vector detected by the magnetic sensor 121. Specifically, for the same chess placement position, when a chess piece 2 is placed at this position, the possible range of the magnitude of the component of the detected magnetic field vector of the corresponding magnetic sensor 121 in the XOY plane is the second preset magnitude interval, and the possible range of the direction of the component of the detected magnetic field vector of the corresponding magnetic sensor in the XOY plane is the second preset direction interval (the possible range of the second direction); when the actual component direction and the actual component magnitude of the magnetic field vector detected by the magnetic sensor 121 in the XOY plane are successively located in the second preset direction interval and the second preset magnitude interval corresponding to the same type of chess piece, it is determined that a chess piece 2 is placed at the chess placement position, and it is determined that the chess piece 2 at the corresponding chess placement position belongs to the type of chess piece corresponding to the interval where the actual component direction and the actual component magnitude are located. This is beneficial to avoiding using the detection result of the magnetic sensor when the cooperation between the chess piece 2 and the chess placement position is abnormal as the identification of the type of the chess piece, and avoiding the error in the identification of the type of the chess piece 2 caused by the abnormal cooperation between the chess piece 2 and the chess placement position; among them, both the second preset magnitude interval and the second preset direction interval can be obtained through experiments and will not be elaborated here.

[0080] Similarly, for the same chess piece placement position, when a chess piece 2 is placed at this position, the possible range of the magnitude of the magnetic field vector detected by the corresponding magnetic sensor is the first preset magnitude interval, and the possible range of the direction of the magnetic field vector detected by the corresponding magnetic sensor is the first preset direction interval (the possible range of the first direction B); when the actual direction and actual magnitude of the magnetic field vector detected by the magnetic sensor 121 of the Chinese chess are successively within the first preset direction interval and the first preset magnitude interval corresponding to the same chess piece type, it is determined that there is a chess piece at the chess piece placement position (that is, it is determined that the chess piece placement position and the chess piece are in a normal matching state), and it is determined that the chess piece 2 at the corresponding chess piece placement position belongs to the chess piece type corresponding to the interval where the actual direction and actual magnitude are located.

[0081] Furthermore, the Chinese chess has a status prompt unit corresponding to the chess piece placement position, and the status prompt unit is communicatively connected to the corresponding magnetic sensor 121; when it is determined that there is a chess piece 2 at the chess piece placement position, the corresponding status prompt unit prompts that the status is normal; when the actual magnitude / actual component magnitude is greater than or equal to a preset second threshold and it is not determined that there is a chess piece at the chess piece placement position, the corresponding status prompt unit prompts that the status is abnormal. Through the prompt of the status prompt unit, when the cooperation between the chess piece 2 and the chess piece placement position is abnormal, the chess player can obtain feedback from the status prompt unit, which is beneficial for the chess player to grasp whether the cooperation between the chess piece 2 and the chess piece placement position is abnormal and is beneficial for improving the user experience. Specifically, the status prompt unit is a status indicator light; when it is determined that there is a chess piece 2 at the chess piece placement position, the corresponding status indicator light is lit green (an example indicating the first normal state); when the actual magnitude / actual component magnitude is greater than or equal to the second threshold and it is not determined that there is a chess piece 2 at the chess piece placement position, the corresponding status indicator light is lit red (an example indicating the abnormal state); when the actual magnitude / actual component magnitude is less than the second threshold, the corresponding status indicator light is turned off (an example indicating the second normal state).

[0082] When the actual magnitude / actual component magnitude of the magnetic field vector detected by the magnetic sensor 121 is greater than or equal to the second threshold, it indicates that there is a chess piece 2 in the area close enough to the corresponding chess piece placement position. Of course, this area is larger than the area of the corresponding chess piece placement position. At this time, this chess piece 2 may be in a cooperative state with the corresponding chess piece placement position, or may be abnormally cooperated with the corresponding chess piece placement position, so that the type of this chess piece 2 cannot be normally identified. Specifically, the value of the second threshold can be determined through experiments and will not be elaborated here.

[0083] Optionally, in other embodiments of the present invention, the status prompt unit may also include sound prompt devices such as speakers and buzzers. The sound prompt devices and the status indicator lights can be used simultaneously or alternatively. When the cooperation between the chess piece 2 and the chess placement position is abnormal, the player is reminded by the sound emitted by the sound prompt device; and / or when the chess piece and the corresponding chess placement position are in a cooperative state and the type of the chess piece can be normally recognized, the player is prompted to know by the sound emitted by the sound prompt device.

[0084] Optionally, in other embodiments of the present invention, the magnetic sensor 121 is only used to detect the linear direction of the magnetic field vector. And when the chess piece is fitted to the chess placement position, the linear directions (another example of the first direction) of the magnetic field vectors corresponding to any two chess pieces 2 are all different. In this way, the type of the chess piece can be identified according to the linear direction of the magnetic field vector detected by the magnetic sensor 121; similarly, the second direction can also be a linear direction. When the second directions are not parallel to each other, the type of the chess piece can be identified according to the linear direction of the magnetic field vector detected by the magnetic sensor.

[0085] Optionally, in other embodiments of the present invention, the entertainment appliance of the present invention may also be other chess games such as military chess, chess, animal chess, etc. In particular, the entertainment appliance of the present invention may also be a chess game with an uncertain initial placement position of the chess pieces, and it can also realize online and offline linked chess playing and remote collaborative chess playing.

[0086] Second Embodiment

[0087] The entertainment appliance in this embodiment is chess. The difference between this embodiment and the first embodiment is that when the center position of the permanent magnet 21 of the chess piece 2 is directly opposite to the corresponding magnetic sensor 121 along the Z-axis direction, the magnetic sensor 121 adopts a three-axis magnetic sensor. The three-axis magnetic sensor can detect the vector components of the magnetic field vector in three mutually perpendicular directions, for example, can detect the vector components of the magnetic field in the X-axis direction, Y-axis direction and Z-axis direction, so as to calculate the direction of the magnetic field vector at the magnetic sensor 121; when the magnitude of the component of the magnetic field detected by the magnetic sensor 121 in the Z-axis direction is greater than or equal to a preset first threshold, it is determined that the cooperation between the chess piece 2 and the chess placement position is abnormal; or when the included angle between the direction of the magnetic field vector detected by the magnetic sensor 121 and the Z-axis direction exceeds the preset included angle range, it is determined that the cooperation between the chess piece 2 and the chess placement position is abnormal.

[0088] The three-axis magnetic sensor can be set with reference to the prior art. For example, it can be set with reference to the three-axis magnetic sensor in the Chinese patent application with the publication number CN108205119A, or with reference to the single-chip three-axis magnetic field sensor in the Chinese patent application with the publication number CN103913709A or CN103105592A, or with reference to the three-axis linear magnetic sensor in the Chinese patent application with the publication number CN103954920A. The magnetic sensing chip in this embodiment can be, for example, the magnetic field sensor chip of CN103105592A.

[0089] In the solution of the first embodiment that only uses the first direction / second direction to identify the type of the chess piece, when the chess piece 2 is in a matching state with the chess piece placement position, the type of the chess piece 2 can be identified through the detection result of the corresponding magnetic sensor. However, when the cooperation between the chess piece and the chess piece placement position is abnormal (for example, the position of the chess piece 2 is offset compared with the position when it is in cooperation with the chess piece placement position, or the posture of the chess piece 2 is tilted compared with the posture when it is in cooperation with the chess piece placement position), it may be incorrect to identify the type of the chess piece 2 through the detection result of the magnetic sensor 121.

[0090] In order to reduce the risk of incorrect identification caused by the abnormal cooperation between the chess piece 2 and the chess piece placement position, in this embodiment, before identifying the type of the chess piece 2, it is first identified whether the cooperation between the chess piece 2 and the chess piece placement position is abnormal. Specifically, when the magnitude of the magnetic field vector in the Z-axis direction detected by the magnetic sensor 121 is greater than or equal to the first threshold, it indicates that there is a chess piece with abnormal cooperation at the corresponding chess piece placement position, that is, it indicates that it is easy to make a mistake in identifying the type of the chess piece at the corresponding chess piece placement position according to the detection result of the magnetic sensor 121 at this time. Similarly, when the included angle between the direction of the magnetic field vector detected by the magnetic sensor and the Z-axis exceeds the preset included angle range, it indicates that it is easy to make a mistake in identifying the type of the chess piece at the corresponding chess piece placement position according to the detection result of the magnetic sensor at this time. The first threshold and the preset included angle range can be specifically set based on experiments. For example, when the cooperation between the chess piece 2 and the chess piece placement position uses the groove as the limiting structure as described in the first embodiment, as long as the chess piece is fitted within the groove, the magnitude of the magnetic field vector in the Z-axis direction that the corresponding magnetic sensor can detect is less than the first threshold, and the included angle between the direction of the magnetic field vector detected by the magnetic sensor and the Z-axis is within the preset included angle range.

[0091] When the chess piece and the chessboard are in a matching state in this embodiment, since the fourth direction A corresponding to the chess piece 2 is perpendicular to the Z-axis direction, and the central positions of the magnetic sensor 121 and the corresponding permanent magnet 21 are directly opposite along the Z-axis direction, the direction of the magnetic field vector detected by the magnetic sensor 121 at this time should be perpendicular to the Z-axis direction, and the magnitude of the magnetic field vector in the Z-axis direction detected by the magnetic sensor should be zero. On this basis, considering that there may be a certain error in the matching between the chess piece 2 and the chess piece placement position, in practice, the magnitude of the component of the magnetic field vector detected by the magnetic sensor 121 in the Z-axis direction will also be significantly smaller than the magnitude of the component of the magnetic field vector in the direction perpendicular to the Z-axis direction. The magnitude of the component of the magnetic field vector detected by the magnetic sensor 121 in the Z-axis direction should be less than the allowable range (less than the first threshold), and the angle between the direction of the magnetic field vector detected by the magnetic sensor 121 and the Z-axis direction should approach 90°. Therefore, if the angle between the direction of the magnetic field vector detected by the magnetic sensor 121 and the Z-axis direction exceeds the preset angle range (for example, 90°±3°), or the magnitude of the component of the magnetic field vector detected by the magnetic sensor 121 in the Z-axis direction is too large (greater than or equal to the preset first threshold), it indicates that the chess piece 2 at the corresponding chess piece placement position is abnormally matched with the corresponding chess piece placement position. When the chess piece 2 is abnormally matched with the chess piece placement position, there may be a large difference between the direction of the magnetic field vector detected by the magnetic sensor 121 and the second direction corresponding to the chess piece 2, and the recognition result of the type of the chess piece 2 may be incorrect at this time. Therefore, this solution also detects whether the chess piece 2 is abnormally matched with the chess piece placement position, which helps to avoid using the detection result of the corresponding magnetic sensor 121 as the recognition of the type of the chess piece when the chess piece 2 is abnormally matched with the chess piece placement position, and reduces the risk of misidentifying the type of the chess piece 2 due to the abnormal matching between the chess piece 2 and the chess piece placement position. In addition, the magnetic sensor of this solution is used both to detect whether the chess piece 2 is abnormally matched with the chess piece placement position and to identify the type of the chess piece 2. In this way, this solution does not need to additionally set a sensor to detect whether the chess piece 2 is abnormally matched with the chess piece placement position, which helps to save the number of sensors, simplifies the structure of this solution, and improves the economy of this solution.

[0092] Further, if it is determined whether there is an abnormally - mated piece 2 at the corresponding piece - placing position only based on whether the included angle between the direction of the magnetic field detected by the magnetic sensor 121 and the Z - axis direction exceeds a preset included - angle range, then when there is no piece 2 near the corresponding piece - placing position, it may be misjudged that there is a piece 2 mated at the corresponding piece - placing position or misjudged that there is an abnormally - mated piece 2 at the corresponding piece - placing position due to the magnetic sensor being interfered by other irrelevant magnetic fields. Therefore, preferably, when the included angle between the direction of the magnetic field detected by the magnetic sensor 121 and the Z - axis direction exceeds the preset included - angle range and the magnitude of the magnetic field detected by the magnetic sensor 121 is greater than or equal to a preset second threshold, it is determined that the corresponding piece - placing position is abnormally mated with the piece 2. Among them, the magnitude of the magnetic field detected by the magnetic sensor 121 being greater than or equal to the preset second threshold indicates that there is a piece at the corresponding piece - placing position (at this time, it may be that the corresponding piece - placing position is in a mated state with the piece 2 or the corresponding piece - placing position is abnormally mated with the piece 2), which can avoid misjudging that there is a piece 2 mated at the corresponding piece - placing position or misjudging that there is an abnormally - mated piece 2 at the corresponding piece - placing position due to the magnetic sensor 121 detecting other irrelevant magnetic fields.

[0093] Preferably, the chess also includes a status - prompting unit, and the status - prompting unit is communicatively connected to the magnetic sensor; when it is determined that the piece - placing position is abnormally mated with the piece 2, the corresponding status - prompting unit issues a prompt message. In this way, when the piece - placing position is abnormally mated with the piece 2, the chess - playing personnel can obtain feedback from the status - prompting unit, which is beneficial for the chess - playing personnel to grasp whether the piece 2 and the piece - placing position are abnormally mated and is beneficial for improving the user experience; specifically, the status - prompting unit can be set with reference to the first embodiment and will not be elaborated here.

[0094] Specifically, the steps for the chess in this embodiment to identify the type of the piece are as follows: First step, obtain the actual magnitude and actual direction of the magnetic - field vector detected by the magnetic sensor 121; Second step, determine whether the actual magnitude of the magnetic field is greater than or equal to the second threshold. If so, execute the third step, determine whether the actual component magnitude of the magnetic field in the Z - axis direction is greater than or equal to the first threshold. If so, execute the fourth step, control the status - prompting unit to issue a prompt message, prompting that the piece 2 and the piece - placing position are abnormally mated; if the execution result of the second step is no, end the program or re - execute the first step. If the execution result of the third step is no, take the type of the piece corresponding to the first direction B that matches the actual direction as the type of the piece 2 mated at the corresponding piece - placing position, thereby completing the identification of the type of the piece 2. Of course, at this time, the status - prompting unit can also be controlled to issue a prompt message indicating that the piece 2 and the piece - placing position are in a mated state.

[0095] Optionally, please refer to Figure 7, in other embodiments of the present invention, a state detection unit may also be additionally provided to detect whether the chess piece 2 is abnormally / normally matched with the chess placement position. For example, the state detection unit includes a magnetic induction switch 122 provided on the chessboard 12 and an induction magnet 22 provided on the chess piece 2. The magnetic induction switch 122 corresponds to the chess placement position. When the magnetic induction switch 122 is triggered by the induction magnet 22, it is determined that the corresponding chess placement position is matched with the chess piece 2. In order to avoid the induction magnet 22 interfering with the detection result of the magnetic sensor 121 and also to avoid the permanent magnet 21 interfering with the magnetic induction switch 122, it is preferably to separate the induction magnet 22 from the permanent magnet 21 and separate the magnetic induction switch 122 from the magnetic sensor 121. For example, the permanent magnet 21 and the induction magnet 22 are placed at both ends of the chess piece 2. Specifically, the magnetic induction switch 122 may be a Hall sensor. Of course, since this solution uses an additional magnetic induction switch 122, the solution is more complex than this embodiment. Therefore, it is preferably to adopt the solution of this embodiment. Further, in the solution of additionally providing a state detection unit to detect whether the chess piece and the chess placement position are abnormally / normally matched, the chess placement position corresponds to a first visual identifier, the first visual identifier is located at the edge of the chess placement position, the chess piece 2 is provided with a second visual identifier, and the second visual identifier is located on the surface of the chess piece 2. When the chess piece 2 is matched with the chess placement position, the corresponding first visual identifier is directly opposite to the corresponding second visual identifier. The combination of the second visual identifier of the chess piece 2 and the corresponding first visual identifier indicates that the chess piece 2 and the corresponding chess placement position are in a matching state. In this way, the limiting structure can be cancelled, and the chess player can place the chess piece in the corresponding chess placement position in a preset posture through the indication of the first visual identifier and the second visual identifier, so as to realize the matching of the chess piece and the corresponding chess placement position. And when the chess piece and the chess placement position are abnormally matched, the chess set can identify this and can send a prompt message to the chess player through the state prompt unit to prompt the chess player to place the chess piece in a state of being matched with the corresponding chess placement position in a preset posture. Preferably, in this solution, the combination of the magnetic induction switch 122 and the induction magnet 22 can also be set in two or more groups, and / or the combination of the first visual identifier and the second visual identifier can also be set in two or more groups.

[0096] The remaining parts of this embodiment are the same as those of the first embodiment.

[0097] Third Embodiment

[0098] Please refer to Figure 8 , the entertainment appliance of this embodiment includes a base 1' and an article 2'. The base 1' includes a housing and a circuit board. The housing includes an upper half shell and a lower half shell. The upper half shell is located above the lower half shell. The upper half shell and the lower half shell enclose an installation cavity. The circuit board is fixed in the installation cavity. The basic composition structure of the base 1' can be referred to the first embodiment and will not be elaborated here.

[0099] On the upper surface of the upper half shell, there are five identification positions distributed along a straight line perpendicular to the vertical direction. The article 2' can be detachably fitted to the identification positions. Each identification position is at most fitted with one article 2' at the same time. A positioning groove is correspondingly provided at each identification position. The cross-sectional profile shape of the normal line of the positioning groove along the vertical direction is an isosceles triangle.

[0100] The number of types of the article 2' is fifteen. Each type of article 2' represents a number / operator. The fifteen numbers / operators are respectively "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-", "×", "÷" and "=". The upper surface of each article 2' has an identification of the corresponding number / operator, and this number / operator identification is the visible type identification of the article 2'.

[0101] The cross-sectional profile shape of the normal line of the article 2' along the vertical direction is an isosceles triangle. The cross-sectional profile of the normal line of the article 2' along the vertical direction matches the cross-sectional profile of the normal line of the positioning groove along the vertical direction. When the article 2' is fitted to the identification position, the article 2' is placed in the corresponding positioning groove. The positioning groove restricts the article 2' in the corresponding identification position in a preset posture and restricts the rotation of the article 2' relative to the base 1'.

[0102] There are five magnetic sensors on the circuit board. The five magnetic sensors correspond to the five identification positions one by one. The article 2' has a permanent magnet. When the article 2' is fitted to the identification position, the type of the article 2' is identified according to the direction of the magnetic field vector sensed by the corresponding magnetic sensor.

[0103] After combining arithmetic processing and voice broadcast / digital display, this embodiment can be used for children to learn arithmetic. Compared with learning methods such as using a tablet computer, this way is not only conducive to increasing children's interest in arithmetic learning itself and enabling children to learn happily, but also can prevent children from contacting computers / mobile phones too early and from being addicted to the virtual world of computers / mobile phones, which is beneficial to the healthy growth of children.

[0104] The positioning groove of this embodiment constitutes a limiting structure. Optionally, in other embodiments of the present invention, a special positioning protrusion can also be added to the bottom of the object. The cross-sectional profile of the normal line of the positioning protrusion along the vertical direction matches the cross-sectional profile of the positioning groove, and the cross-sectional profile shape of the positioning groove in cooperation with the article 2' can also be changed, or the article 2' can be restricted by the cooperation of two or more groups of positioning protrusions and positioning grooves; in addition, the positions of the positioning protrusion and the positioning groove can also be interchanged, that is, a positioning protrusion can be provided at the identification position of the base 1'.

[0105] Optionally, in other embodiments of the present invention, the cultural and entertainment utensils can also be other devices and equipment related to culture, education, sports, and art.

[0106] Other parts of this embodiment are the same as those of the first embodiment.

[0107] For example, the positional relationship among the identification bits, the corresponding magnetic sensors, and the articles 2' that cooperate with the identification bits in this embodiment can be set with reference to the positional relationship among the chess-drop positions, the corresponding magnetic sensors, and the chess pieces that cooperate with the chess-drop positions in the first embodiment, so as to ensure that the types of the articles 2' can be identified according to the direction of the magnetic field vector detected by the magnetic sensors. Specifically, the magnetic sensors are located directly below the corresponding articles 2', and the magnetic sensors are located directly below the permanent magnets of the corresponding articles 2'. The direction from the south pole to the north pole of the permanent magnet is the fourth direction, and the fourth direction of each permanent magnet is perpendicular to the vertical direction. The fourth directions of the permanent magnets of the same type of article 2' are the same. For the same identification bit, there are differences between the fourth directions corresponding to any two articles 2' when they cooperate with the identification bit. For example, five identification bits are distributed in sequence along the reference direction M, and the rotation angles of the fourth directions corresponding to various articles 2' representing "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-", "×", "÷", and "=" rotating clockwise to be the same as the reference direction M increase in an arithmetic progression. The fourth direction corresponding to each article 2' is perpendicular to the vertical direction, that is, the rotation angle corresponding to the article 2' representing "0" is 0°, the rotation angle corresponding to the article 2' representing "1" is 24°, the rotation angle corresponding to the article 2' representing "2" is 48°, and so on; for the same identification bit, when an article 2' is cooperated with the identification bit, the vector direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor is the first direction. The first directions corresponding to the same type of article 2' are the same, and there are differences between the first directions corresponding to any two articles 2'. In this way, the types of the articles 2' can be identified according to the direction of the magnetic field vector sensed by the corresponding magnetic sensors when the articles 2' are cooperated with the identification bits.

[0108] Optionally, in other embodiments of the present invention, the reference direction M may also extend along an arc, or the reference direction M extends along a curve.

[0109] Optionally, in other embodiments of the present invention, the number of the identification bits can also be adjusted to adapt to arithmetic learning of different difficulties. Of course, the number of the identification bits can also be one, or the identification bits are multiple distributed in other ways, such as distributed in two columns.

[0110] For another example, similar to the first embodiment, the first direction corresponding to each article 2' may also have a certain error range, and the size of this error range can be preset.

[0111] Optionally, in other embodiments of the present invention, the article 2' representing different numbers / operators may also be replaced by an article 2' representing different letters. For example, the article 2' representing different letters includes a total of twenty-six kinds representing "a", "b", "c", "d", "e", "f", "g", "h"... "v", "w", "x", "y", "z". The type of the article 2' is identified according to the direction of the magnetic field vector sensed by the magnetic sensor. After combining arithmetic processing and voice broadcast / digital display (such as existing calculators), it can be used for children to learn English / pinyin.

[0112] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A recreational appliance, comprising a base body and an article, the base body having an identification position, the article being detachably fitted to the identification position in a preset posture, and at most one article being fitted to the same identification position at the same time; It is characterized in that: The article has a permanent magnet, and the base body is provided with a magnetic sensor at a position corresponding to the identification position; The magnetic sensor can be used to detect the direction of the magnetic field at its location. For the same identification position, when the article is fitted to the identification position, the direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor is the first direction, and the first directions corresponding to any two articles are different; or the magnetic sensor can be used to detect the component direction of the magnetic field at its location on a preset plane. For the same identification position, when the article is fitted to the identification position, the component direction of the magnetic field generated by the corresponding permanent magnet at the corresponding magnetic sensor on the preset plane is the second direction, and the second directions corresponding to any two articles are different; The direction from the south pole to the north pole of the permanent magnet is the fourth direction. For the same identification position, the fourth directions of the permanent magnets corresponding to the articles when they are fitted to the identification position are all perpendicular to the third direction, and the fourth directions corresponding to any two articles are different; The magnetic sensor is a triaxial magnetic sensor, the triaxial magnetic sensor can be used to detect the magnitude of the magnetic field, and the central position of the permanent magnet of the article is directly opposite to the corresponding magnetic sensor along the third direction; When the magnitude of the component of the magnetic field detected by the magnetic sensor in the third direction is greater than or equal to a preset first threshold, it is determined that the corresponding identification position is abnormally fitted with the article; or when the included angle between the direction of the magnetic field detected by the magnetic sensor and the third direction exceeds a preset included angle range, it is determined that the corresponding identification position is abnormally fitted with the article; The recreational appliance further includes a status prompt unit, and the status prompt unit is communicatively connected to the magnetic sensor; When it is determined that the identification position is abnormally fitted with the article, the corresponding status prompt unit issues a prompt message.

2. The recreational appliance according to claim 1, wherein: The fitting of the base body and the article has a limiting structure, the limiting structure limits the article in the identification position in the preset posture, and the limiting structure limits the relative rotation of the article with respect to the base body; The limiting structure includes a concave-convex fitting structure; and / or the limiting structure includes a magnetic positioning structure.

3. The recreational appliance according to claim 1, wherein: The recreational appliance includes a magnetic induction switch provided on the base body and an induction magnet provided on the article, the magnetic induction switch corresponds to the identification position, and when the magnetic induction switch is triggered by the induction magnet, it is determined that the corresponding identification position is fitted with the article.

4. The recreational appliance according to claim 1, wherein: The identification bit corresponds to a first visible identifier, and the article is provided with a second visible identifier. The combination of the second visible identifier of the article and the corresponding first visible identifier indicates that the article and the corresponding identification bit are in a mating state.

5. The entertainment device according to claim 1, wherein: The entertainment device is a chess set, the chessboard of the chess set is the base body, the chess pieces of the chess set are the articles, and the chess positions on the chessboard are the identification bits; or The entertainment device is an educational stationery, the article is a movable block representing a letter, or the article is a movable block representing a number / operator.

6. The entertainment device according to claim 1, wherein: When the included angle between the direction of the magnetic field detected by the magnetic sensor and the third direction exceeds a preset included angle range, and the magnitude of the magnetic field detected by the magnetic sensor is greater than or equal to a preset second threshold, it is determined that the corresponding identification bit and the article are abnormally mated.

7. The entertainment device according to claim 1, wherein: The magnetic sensor can be used to detect the vector direction of the magnetic field at its location, the first direction is the vector direction, and the second direction is the vector direction; or the magnetic sensor can be used to detect the linear direction of the magnetic field at its location, the first direction is the linear direction, and the second direction is the linear direction; The magnetic sensor includes a magnetic sensing chip; The article is detachably mated with the corresponding identification bit along the third direction.

8. The entertainment device according to claim 1, wherein: The base body has a first mating surface at the identification bit, the article has a second mating surface, the first mating surface is attached to the corresponding second mating surface of the article, and the normal lines of the first mating surface and the corresponding second mating surface of the article are both along the third direction.

9. The entertainment device according to any one of claims 1 to 5, wherein: The magnetic sensor detects the actual direction of the magnetic field, and the entertainment device uses the type of article corresponding to the first direction that matches the actual direction as the type of article that mates with the corresponding identification bit; The magnetic sensor detects the actual component direction of the magnetic field in the preset plane, and the entertainment device uses the type of article corresponding to the second direction that matches the actual component direction as the type of article that mates with the corresponding identification bit.

10. The entertainment device according to any one of claims 1 to 5, wherein: For the same identification bit, when the article is mated with the identification bit, the possible range of the magnitude of the magnetic field detected by the corresponding magnetic sensor is a first preset magnitude interval, and the possible range of the direction of the magnetic field detected by the corresponding magnetic sensor is a first preset direction interval; When the actual direction and actual magnitude of the magnetic field detected by the magnetic sensor are successively within the corresponding first preset direction interval and the first preset magnitude interval of the same item type, it is determined that the item is fitted at the identification position, and it is determined that the item at the corresponding identification position belongs to the item type corresponding to the interval where the actual direction and actual magnitude are located; For the same identification position, when the item is fitted at the identification position, the possible range of the magnitude of the component of the magnetic field detected by the corresponding magnetic sensor in the preset plane is the second preset magnitude interval, and the possible range of the direction of the component of the magnetic field vector detected by the corresponding magnetic sensor in the preset plane is the second preset direction interval; When the actual component direction and actual component magnitude of the magnetic field detected by the magnetic sensor are successively within the corresponding second preset direction interval and the second preset magnitude interval of the same item type, it is determined that the item is fitted at the identification position, and it is determined that the item at the corresponding identification position belongs to the item type corresponding to the interval where the actual component direction and actual component magnitude are located.

11. The entertainment appliance according to claim 10, wherein: The entertainment appliance has a status indication unit corresponding to the identification position, and the status indication unit is communicatively connected to the corresponding magnetic sensor; When it is determined that the item is fitted at the identification position, the corresponding status indication unit indicates that the status is normal; and / or When the actual magnitude / actual component magnitude is greater than or equal to a preset second threshold and it is not determined that the item is fitted at the identification position, the corresponding status indication unit indicates that the status is abnormal.

12. The entertainment appliance according to claim 11, wherein: The status indication unit is a status indicator light / a sound indication device; When it is determined that the item is fitted at the identification position, the corresponding status indication unit indicates the first normal status; When the actual magnitude / actual component magnitude is less than the second threshold, the corresponding status indication unit indicates the second normal status.

Images