Dice

Abstract

The utility model provides a dice which comprises a ball body, a plurality of circular sections are arranged on the periphery of the ball body, a certain distance is formed between every two adjacent circular sections, or every two adjacent circular sections are tangent, the radiuses of the circular sections are equal, the distances from the circle centers of the circular sections to the gravity center of the ball body are equal, and the distances from the circle centers of the circular sections to the gravity center of the ball body are equal. And the connecting line of the gravity center of the ball body and the circle center of the circular section is vertical to the corresponding circular section. According to the dice, the round sections are arranged on the ball body, and the diameters between the round sections and the vertical distances from the gravity center of the ball body to the round sections are the same, so that the forces borne by all the surfaces of the dice from a rolling state to a static state and from the static state to the rolling state are the same, and the probability that all the surfaces are thrown out is equal; therefore, the fairness of the game and the use experience of the user are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dice, especially a dice with equal probability of each face. BACKGROUND

[0002] Dice, also known as color dice, is a game tool, which is a small cube with six sides engraved with 1-6 points in ancient times, and is generally used in chess games to improve the fairness and playability of the game.

[0003] The dice on the market generally have multiple planes, and theoretically, the dice with uniform shape have equal probability of each face up after being rolled to reflect the fairness of the game. However, the dice actually have some defects: when the dice are rolled, the probability of each face up is not equal, which affects the fairness of the game and the user's experience. For example, the common hexahedral dice is similar to a cube, and when the dice are rolled, the force required for different positions of the same face and different faces to be rolled out is not the same, resulting in unequal probability of each face being rolled up, and the intersection between the faces is a straight ridge, which affects the randomness and thus the fairness of the game and the user's game experience. SUMMARY

[0004] To solve the problems in the prior art, the utility model provides a dice with equal probability of each face and good rolling property to improve the fairness of the game and the user's experience.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model provides a dice, which comprises a spherical body, a plurality of circular sections are arranged on the periphery of the spherical body, adjacent two of the circular sections have a certain spacing or are tangent to each other, the radii of the circular sections are equal, the distances from the centers of the circular sections to the center of gravity of the spherical body are equal, and the line connecting the center of gravity of the spherical body and the center of the circular section is perpendicular to the corresponding circular section.

[0007] Further, the center of gravity of the spherical body coincides with the center of the spherical body.

[0008] Further, the rolling property Tr of the dice is represented by the ratio of the diameter of the circular section to the diameter of the spherical body, and 0

[0009] Further, when the circular section is two, 0

[0010] Further, when the circular section is three, 0

[0011] Further, when the circular cross-section is four, 0 < Tr < √(6) / 3.

[0012] Further, when the circular cross-section is five or six, 0 < Tr < 1 / √(2).

[0013] Further, when the circular cross-section is seven, 0 < Tr < sin36°.

[0014] Further, when the circular cross-section is eight or nine or ten, 0 < Tr < √(6) / 6.

[0015] Further, the circular cross-section and / or the curved surface between adjacent circular cross-sections is provided with an identification.

[0016] Further, the identification is an Arabic numeral or a dot number.

[0017] Due to the adoption of the above technical scheme, the utility model has the following technical effects: by providing the circular cross-section on the sphere, and the diameters between the circular cross-sections and the vertical distance from the sphere gravity center to the circular cross-section being the same, the forces received by each face of the dice from the rolling state to the static state and from the static state to the rolling state are the same, so as to ensure the equal probability of each face being thrown, thereby improving the fairness of the game and the user's use experience. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below, and obviously, the drawings in the following description only relate to some embodiments of the utility model, but not limit the utility model.

[0019] Figure 1 is a structure schematic view of the dice when the circular cross-section is two in the utility model.

[0020] Figure 2 is a structure schematic view of the dice when the circular cross-section is three in the utility model.

[0021] Figure 3 is a structure schematic view of the dice when the circular cross-section is four in the utility model.

[0022] Figure 4 is another structure schematic view of the dice when the circular cross-section is four in the utility model.

[0023] Figure 5 is a structure schematic view of the dice when the circular cross-section is five in the utility model

[0024] Figure 6is a structure schematic view of the dice when the circular section is 6 in the utility model.

[0025] Figure 7 is a structure schematic view of the dice when the circular section is 7 in the utility model.

[0026] Figure 8 is a structure schematic view of the dice when the circular section is 8 in the utility model.

[0027] Figure 9 is a structure schematic view of the dice when the circular section is 9 in the utility model.

[0028] Figure 10 is a structure schematic view of the dice when the circular section is 10 in the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model will be further described in detail below in combination with the drawings. The components of the embodiments of the utility model usually described and shown in the drawings can be arranged and designed in various different configurations. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the scope of protection of the utility model.

[0030] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0031] Unless otherwise defined, technical terms or scientific terms used in the present patent document shall have the ordinary meanings as understood by one of ordinary skill in the art to which the present patent belongs. The terms "first", "second", and similar terms used in the patent specification and claims of the present patent do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", or "the" do not denote a quantity limitation, but indicate the presence of at least one. The terms "include" or "contain" and similar terms mean that the elements or objects appearing before the terms "include" or "contain" encompass the elements or objects listed after the terms "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used only to indicate relative positional relationships, which may change accordingly when the absolute positions of the described objects change. They are used only to facilitate the description of the present patent and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present patent.

[0032] In the description of the present patent, it should be noted that, unless otherwise specified and limited, the terms "mount", "connect", and "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0033] Some embodiments of the present patent will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0034] Please refer to Figures 1 to 10 The present patent provides a dice, which comprises a sphere 1, a plurality of circular cross sections 2 are provided on the outer periphery of the sphere 1, the circular cross section 2 is a plane and its outer periphery is circular, the circular cross section 2 can be cut on the sphere 1, or it can be directly integrally injection molded with the sphere 1, of course, it can also be produced by other methods, which will not be described here.

[0035] The use of the sphere 1 and the circular cross section 2 provided on the sphere 1 can improve the rolling performance of the dice, so that it can be effectively rolled after being thrown.

[0036] The two adjacent circular sections 2 are spaced apart or tangent to each other to ensure that the two adjacent circular sections 2 do not intersect, and the curved surface between the two adjacent circular sections 2 is formed, thereby ensuring the effective rolling of the dice.

[0037] The radii of the respective circular sections 2 are equal, the distances from the centers of the respective circular sections 2 to the center of gravity of the sphere 1 are equal, and the line connecting the center of the respective circular section 2 to the center of gravity of the sphere 1 is perpendicular to the corresponding circular section 2, so that the distances from the periphery of the circular section 2 to the center of gravity of the sphere 1 are also equal.

[0038] The probabilities of the respective faces of the single dice are proportional to the forces required for the respective faces to change from the rolling state to the stationary state, and are also proportional to the distances from the respective faces to the center of gravity of the single dice. The probability of a single face of the dice is equal to the moment of the force required for the face to change from the rolling state to the stationary state divided by the sum of the moments of the forces required for the respective faces to change from the rolling state to the stationary state.

[0039] According to Newton's third law, the force required for the rolling state to change to the stationary state is equal to the force required for the stationary state to change to the rolling state. When the distances from the respective faces of the dice to the center of gravity of the single dice are also equal, the probabilities of the respective faces of the dice are equal. Therefore, when the radii of the respective circular sections 2 are equal, the distances from the centers of the respective circular sections 2 to the center of gravity of the sphere 1 are equal, and the line connecting the center of the respective circular section 2 to the center of gravity of the sphere 1 is perpendicular to the circular section 2, the distances from the periphery of the circular section 2 to the center of gravity of the sphere 1 are also equal. That is, no matter which direction the dice are rolled, the moment of the force acting on the same face is equal. Therefore, when the dice are rolled, the moment of the force acting on the respective faces of the dice is equal, and the probabilities of the respective faces being rolled are equal, thereby ensuring the fairness of the game and improving the user experience.

[0040] When the center of gravity of the sphere 1 coincides with the center of the sphere 1, it can be ensured that the sphere 1 is a medium homogeneous object, and the forces acting on the respective faces of the sphere 1 are equal, and the distances from the respective faces to the center of gravity of the sphere 1 are equal. That is, when the dice are stably placed, the moments of the forces required for the respective faces of the dice to change from the stationary state to the rolling state are equal, thereby further improving the probabilities of the respective faces being rolled.

[0041] In order to better identify the respective faces, the curved surface between the respective circular sections 2 and / or the adjacent circular sections 2 is provided with a mark. The mark can be an Arabic numeral or a point number, and can also be other marks. Figure 1 4 6, 8, and 10, the mark is arranged on the circular section 2, as shown in Figure 2 3 9, the mark is arranged on the curved surface between the adjacent circular sections 2, as shown in Figure 5 7 The mark is arranged on both the circular section 2 and the curved surface. ​​​

[0042] The identification can be printed by means of laser etching, silk screen printing, pad printing and the like, and belongs to the prior art, which will not be described herein.

[0043] When the diameter of the circular section 2 is larger, the rolling property of the dice is worse and the stability is better, and vice versa. Taking two circular sections as an example, when the diameter of the circular section 2 approaches zero, the circular section 2 approaches a sphere 1, the rolling property approaches perfect, and the dice is difficult to stop after being thrown. When the diameter of the circular section 2 approaches the diameter of the sphere 1, the circular section 2 is enlarged infinitely, which is similar to a circular coin with an infinitely small thickness. The stability approaches perfect, and the rolling property approaches zero. If the rolling property is too high, the dice is difficult to stop stably. If the rolling property is too low, the dice is easy to be stuck at a circular section 2 and lose the randomness, so that the probability of each face being thrown is not equal, and the randomness of the dice cannot be effectively ensured.

[0044] In the embodiment, the rolling property Tr of the dice is expressed by the ratio of the diameter of the circular section 2 to the diameter of the sphere 1, Tr = d / D, wherein d is the diameter of the circular section 2, and D is the diameter of the sphere 1, 0 < Tr < 1.

[0045] After a large number of calculations and tests by the applicant, when the circular section is two, 0 < Tr < 1, preferably 0.5 < Tr < 0.65, the rolling property and the stability are balanced, the randomness of the dice is ensured, and the fairness of the game and the user experience are improved. When the circular section is three, 0 < Tr < √(3) / 2. When the circular section is four, 0 < Tr < √(6) / 3. When the circular section is five or six, 0 < Tr < 1 / √(2). When the circular section is seven, 0 < Tr < sin36°. When the circular section is eight or nine or ten, 0 < Tr < √(6) / 6. Here, the examples are not listed one by one.

[0046] By limiting the Tr threshold value, the circular section 2, the sphere 1, the radius of the circular section 2, the distance from the center of the circle to the center of the sphere, and the vertical arrangement of the connecting line between the center of the circle and the center of the sphere and the circular section 2, the probability of each face being thrown can be effectively ensured to be equal after the dice is thrown, the fairness and randomness of the game are ensured, and the user experience is improved.

[0047] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A dice, characterized in that, The ball has a plurality of circular sections on its periphery, adjacent two of which have a certain interval or are tangent to each other, the radius of each of the circular sections is equal, the distance from the center of each of the circular sections to the center of gravity of the ball is equal, and the line connecting the center of gravity of the ball and the center of each of the circular sections is perpendicular to the corresponding circular section.

2. The dice of claim 1, wherein, The center of gravity of the ball coincides with the center of the ball.

3. The dice of claim 1 or 2, wherein, The rolling property Tr of the dice is expressed by the ratio of the diameter of the circular section to the diameter of the ball, 0 4. The dice of claim 3, wherein, When the circular section is two, 0 5. The dice of claim 3, wherein, When the circular section is three, 0 6. The dice of claim 3, wherein, When the circular section is four, 0 7. The dice of claim 3, wherein, When the circular section is five or six, 0 8. The dice of claim 3, wherein, When the circular section is seven, 0 9. The dice of claim 3, wherein, When the circular section is eight, nine or ten, 0 10. The dice of claim 1, wherein, The circular section and / or the curved surface between adjacent circular sections is provided with an identification.

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