Toy system and card

Abstract

The invention provides a toy system and a card. A moving body stably travels on the card. The toy system comprises a moving body (20) and a card (30), the moving body (20) can travel by itself through rotating wheels, and the moving body can travel on the card (30). The card includes a single sheet or a plurality of superposed sheets (35, 36, 37), and the friction coefficient of the back surface side surface of the card is greater than the friction coefficient of the front surface side surface of the card.

Description

Technical Field

[0001] The invention relates to a toy system and a card. Background Art

[0002] There is a toy system in which cards are arranged on a flat surface such as a table, and a moving body runs on the cards.

[0003] Patent Document 1 describes that a moving body travels on arranged command cards, recognizes patterns printed on the command cards, and obtains instructions for controlling the movement of the moving body based on the patterns.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2020 / 036146

[0007] Problems to be solved by the invention

[0008] Depending on the environment in which the card is arranged, when the mobile body travels on the card, the position of the card may sometimes move. Due to such a phenomenon, it is difficult for the mobile body to travel stably. Summary of the invention

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a technology capable of causing a mobile body to travel stably.

[0010] Technical solutions to solve problems

[0011] In order to solve the above problems, the present invention provides a toy system, which includes: a moving body that can move by itself through rotating wheels; a card, the moving body can move on the card, the card includes a sheet or multiple overlapping sheets, and the friction coefficient of the surface on the back side of the card is greater than the friction coefficient of the surface on the front side of the card.

[0012] In one embodiment of the present invention, the card may include a sheet serving as a base material and two sheets constituting the surface side and the back side of the card respectively, and the material of the sheet constituting the surface side of the card is the same as the material of the sheet constituting the back side of the card.

[0013] In one aspect of the present invention, the sheet constituting the surface on the front side of the card and the sheet constituting the surface on the back side of the card may contain the same type of resin.

[0014] In one aspect of the present invention, the surface on the back side of the card may be subjected to surface processing having a higher friction coefficient than a friction coefficient of the surface on the front side of the card.

[0015] In one aspect of the present invention, a visually recognizable image may be printed on the surface of the front side of the substrate.

[0016] In one aspect of the present invention, a pattern may be printed on the surface of the front side of the substrate, the pattern being readable by the moving body and encoding information for controlling the movement of the moving body.

[0017] In one aspect of the present invention, the card may have a thickness of 0.45 mm or less.

[0018] In addition, the present invention provides a card on which a self-propelled movable body can travel, wherein the card comprises a sheet or a plurality of overlapping sheets, and the friction coefficient of the surface on the back side of the card is greater than the friction coefficient of the surface on the front side of the card.

[0019] In one aspect of the present invention, a pattern may be printed on the card, the pattern being readable by the moving body and encoding information for controlling the movement of the moving body.

[0020] Effects of the Invention

[0021] According to the present invention, the moving body can stably run on the card. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram showing an example of a toy system according to an embodiment of the present invention.

[0023] Figure 2 This is a diagram showing an example of the hardware configuration of a toy system.

[0024] Figure 3 This is a diagram showing an example of a moving object as viewed from below.

[0025] Figure 4 This is a schematic cross-sectional view of the card.

[0026] Figure 5 This is a diagram for explaining an example of a moving object traveling on a card.

[0027] Figure 6 This is a diagram for explaining an example of an image printed on a card.

[0028] Figure 7 This is a diagram for explaining an example of control of a moving object using a card.

[0029] Figure 8 This is a flowchart showing an example of the processing of the moving object.

[0030] Fig. 9 This is a flowchart showing an example of the processing of the moving object.

[0031] Description of Reference Numerals

[0032] 20 moving body; 21 processor; 22 storage; 23 communication unit; 24 camera; 25 motor; 26 speaker; 222 switch; 223 power switch; 254 wheel; 30, 30b, 30h card; 31 internal area; 32 peripheral area; 35 substrate; 36 surface sheet; 37 back sheet; 39 printing layer; 71 pattern; 72 identification pattern; 73 peripheral pattern. DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the present invention will be described based on the drawings. Among the components that appear, components having the same functions are denoted by the same reference numerals, and descriptions thereof will be omitted.

[0034] Figure 1 1 is a diagram showing an example of a toy system according to an embodiment of the present invention. The toy system of the present invention includes at least a moving body 20 and a plurality of cards 30. The moving body 20 has a cubic shape with chamfered corners. In addition, a plurality of protrusions for mounting other toys are provided on the upper surface.

[0035] At least a part of the plurality of cards 30 is placed by the user at any position on a plane (eg, a table or a floor). When the moving body 20 travels on any card 30, the image is read and an action corresponding to the instruction indicated by the image is performed.

[0036] The plurality of cards 30 are classified into a plurality of card types, and are printed with images encoding information corresponding to the card types. The information is information for controlling the action of the moving body 20, and is classified into action instructions and setting instructions. The card 30 printed with an image encoding an action instruction is called an action instruction card.

[0037] The plurality of cards 30 include a plurality of action instruction cards, on which images indicating action instructions of the mobile body 20 are printed respectively. The plurality of action instruction cards are printed with coded images indicating any one of the plurality of action instructions of the mobile body 20 respectively. The types of action instructions correspond to the types of cards in a one-to-one correspondence, and decoding the card types is equivalent to decoding the action instructions.

[0038] In addition, the action instructions are classified into multiple categories (groups). The multiple categories include a state change system, a motion system, and a forced system. The state change system is a group composed of instructions for changing the action of the mobile body 20 (for example, the state of driving). The action instructions belonging to the state change system are further classified into multiple subgroups. The multiple subgroups include a steering (handle) subgroup, a speed subgroup, and a braking subgroup. For each of the subgroups, there is a driving parameter. The steering subgroup includes an instruction to set the state of the steering to the right or left and an instruction to set the state of the steering to go straight. The speed subgroup includes an instruction to set the driving parameter of the speed to a specified value. The specified value can be any one of a plurality of predetermined candidate values ​​(for example, slow, fast, and very fast). The braking subgroup includes a braking instruction to continuously reduce the speed. In addition, the action instructions can be marked as multiple subgroups such as a speed subgroup and a steering subgroup.

[0039] The motion system is mainly composed of instructions for causing the mobile body 20 to perform a predetermined action. In the instructions of the motion system, the previous action can be restarted after the action is performed. In addition, in the instructions of the motion system, there are cases where the result of the action is a change in the driving state. The forced system is a group consisting of instructions for causing the mobile body 20 to stop immediately.

[0040] Figure 2 2 is a diagram showing an example of a hardware configuration of a toy system. A moving body 20 included in the toy system includes a processor 21 , a memory 22 , a communication unit 23 , a camera 24 , two motors 25 , and a speaker 26 .

[0041] The processor 21 operates according to the program stored in the storage 22, and controls the communication unit 23, the camera 24, the motor 25, the speaker 26, etc. The above program can be provided from another computer through communication via the communication unit 23. The above program can be provided to another computer by being stored in a computer-readable storage medium such as a flash memory or an optical disk. The number of processors 21 can be one or more.

[0042] The memory 22 is composed of a DRAM, a nonvolatile memory, etc. The memory 22 stores the above-mentioned program. In addition, the memory 22 stores information or calculation results input from the processor 21, the communication unit 23, etc.

[0043] The communication unit 23 is composed of a radio frequency circuit or an antenna for communicating with other devices. The communication unit 23 has a function of communicating with other devices (such as a computer) according to the Bluetooth (registered trademark) protocol or the wireless LAN protocol. Based on the control of the processor 21, the communication unit 23 inputs information received from other devices to the processor 21 or the storage 22, and sends information to other devices. In addition, the communication unit 23 can also communicate with other devices via a wired network.

[0044] The camera 24 is configured to capture the bottom of the moving body 20 and repeatedly capture the bottom of the moving body 20. When the moving body 20 travels on the card 30, the camera 24 captures the pattern 71 (see FIG. 1 ) printed on the card 30. Figure 4 ). In this embodiment, a pattern 71 that can be recognized by the frequency domain of infrared rays is printed on the card 30, and the camera 24 captures an image of the infrared rays. In addition to the pattern 71, a picture that can be recognized by visible light is also printed on the card 30.

[0045] The motor 25 is a so-called servo motor whose rotation direction, rotation amount, and rotation speed are controlled by the processor 21 .

[0046] The speaker 26 outputs audio based on the control of the processor 21 and the like.

[0047] Figure 3 2 is a diagram showing an example of a moving body 20 viewed from below. The moving body 20 further includes a switch 222, a power switch 223, and two wheels 254. One motor 25 is assigned to each of the two wheels 254, and the motor 25 drives the assigned wheel 254. The driving mechanism including the motor 25 and the wheel 254 constitutes a driving device for driving the moving body 20.

[0048] Next, the structure of the card 30 will be described. Figure 4 2 is a schematic cross-sectional view of the card 30. The card 30 has a strength that is not easily bent. The friction coefficient of the back surface of the card 30 is greater than the friction coefficient of the front surface of the card 30.

[0049] The card 30 includes a plurality of overlapping sheets. The plurality of sheets include a substrate 35, a surface sheet 36, and a back sheet 37. The surface sheet 36 constitutes the surface of the card 30, and the back sheet 37 constitutes the back of the card 30. The plurality of sheets overlap in the order of the surface sheet 36, the substrate 35, and the back sheet 37 from the top. There is a printed layer 39 between the substrate 35 and the surface sheet 36. On the surface of the surface side of the substrate 35, as the printed layer 39, an image that can be recognized by visible light and a pattern 71 that can be recognized by infrared rays are printed. The thickness of the card 30 is less than 0.45 mm. As long as the thickness is such that the movable body 20 can climb up and is not easily bent, it will be sufficient.

[0050] The substrate 35 may be a resin or paper. More specifically, the material of the substrate 35 may be any one of paper, polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET), and polyvinyl chloride (PVC). The material of the substrate 35 may be selected from the above materials in consideration of the degree of rigidity, durability, price, and heat resistance.

[0051] The surface sheet 36 and the back sheet 37 are films attached to the base material 35. The surface sheet 36 and the back sheet 37 can be formed by so-called lamination processing of attaching a film on the base material 35, or can be formed by coating. The material of the surface sheet 36 can be the same as the material of the back sheet 37, and specifically, they can include the same type of resin. Specifically, the material of the surface sheet 36 and the back sheet 37 can be any one of PP and PET. By making the material of the surface sheet 36 and the back sheet 37 the same, the generation of the warpage caused by temperature changes etc. can be prevented.

[0052] Here, the surface on the back side of the card 30, that is, the back sheet 37, is subjected to a surface processing with a higher friction coefficient than the surface on the surface side of the card 30. For example, the surface on the back side of the card 30 may be subjected to velvet PP processing, and the surface on the surface side may be subjected to frosting processing. In addition, the surface on the back side may be subjected to frosting processing, and the surface on the surface side may not be subjected to processing. These processings may be performed by attaching a film with a rough surface (e.g., frosted film, frosted soft film) as the surface sheet 36 or the back sheet 37 to the substrate 35, or by coating the surface sheet 36 or the back sheet 37 with any of materials such as resin, varnish, and silicon-based ink.

[0053] By these surface treatments, the friction coefficient can be increased even without applying a sealing adhesive to the back side of the card 30. Instead of using the surface treatment of the front sheet 36 or the back sheet 37, the friction coefficient can be adjusted by applying any of materials such as resin, varnish, and silicon-based ink to the base material 35. In this case, the card 30 can be composed of one sheet, and the sheet is composed of the base material 35.

[0054] Figure 5 This is a diagram for explaining an example of a moving body 20 running on a card 30. Figure 5 In the figure, a card 30 is arranged on a table. If the moving body 20 travels on the card 30, due to the friction between the rotating wheels 254 and the card 30, a force in the opposite direction (toward the rear) to the moving direction of the moving body 20 is transmitted to the card 30. If the friction between the card 30 and the table is insufficient, the card 30 will deviate backward. By increasing the friction coefficient of the surface on the back side of the card 30, the limit of the static friction between the card 30 and the table is increased, and the displacement of the card 30 can be suppressed. In addition, by reducing the friction coefficient of the surface on the front side of the card 30, when the moving body 20 moves suddenly, the possibility of excessive force being transmitted to the card 30 and its position being displaced can be reduced.

[0055] Next, the planar structure of the printed layer 39 will be described. Figure 6 This is a diagram for explaining an example of an image printed on the card 30. The surface side of the card 30 includes Figure 6 The inner area 31 surrounded by the dotted line and the peripheral area 32 outside the dotted line and surrounding the inner area 31. A plurality of patterns 71 are printed in a matrix on the surface side of the card 30 (strictly speaking, the surface side of the substrate 35). The patterns 71 are images of a predetermined size, such as 0.2 mm square. The patterns 71 are images that encode information for controlling the movement of the moving body 20. This information is also the card type.

[0056] The size of each pattern 71 is smaller than the size of the moving body 20. Figure 4 In FIG. 1 , the pattern 71 is described on a part of the card 30, but in reality, it is arranged so as to fill the entire card 30. For ease of explanation, the image "Sound" that can be recognized by visible light is described by a dotted line.

[0057] In the internal area 31, a plurality of identification patterns 72 are arranged in a pattern 71, which indicates the type of card to which the card 30 belongs. The identification pattern 72 is an image that encodes the information of the card category, and the image of the identification pattern 72 varies depending on the type of card. The plurality of identification patterns 72 are arranged in a matrix in the internal area 31. In the same card 30, the plurality of identification patterns 72 may be the same image. In addition, the internal area 31 may not be rectangular, and the pattern 71 exposed from the internal area 31 is not the identification pattern 72, but becomes the peripheral pattern 73 described later. In addition, the identification patterns 72 are arranged in the internal area 31 in a number such as 3×3 or more, so that the mobile body 20 traveling in the internal area 31 can definitely identify the identification pattern 72. The identification pattern 72 may not necessarily be arranged in a matrix, and may be arranged in a concentric circle, for example.

[0058] The peripheral area 32 is arranged at the periphery of the surface of the card 30. A plurality of peripheral patterns 73 are arranged in the peripheral area 32 in a manner of surrounding the internal area 31 in which the plurality of identification patterns 72 are arranged. If the viewing angle is changed, the identification pattern 72 representing any one of the card types is not printed in the peripheral area 32. The peripheral pattern 73 is a pattern 71 that does not represent any one of the plurality of card types, and is an image that encodes peripheral information different from the information representing the card type. In the present embodiment, the peripheral information is a fixed value regardless of the card type, but it may not necessarily be a fixed value. The plurality of peripheral patterns 73 only need to be arranged so as to be read by the mobile body 20 traveling from the internal area 31 toward the outside of the card 30, and may not necessarily be arranged in a matrix. The width of the peripheral area 32 may be, for example, more than twice the size of the pattern 71.

[0059] In addition, although the dot-dash line is not actually printed, it is clear that the boundary between the inner region 31 and the peripheral region 32 exists between the adjacent identification pattern 72 and the peripheral pattern 73, and the existence of the inner region 31 and the peripheral region 32 can be easily confirmed. The pattern 71 may not be printed in the peripheral region 32.

[0060] When traveling on the card 30, the camera 24 of the moving body 20 captures the pattern 71 (image) printed on the card 30, and the processor 21 decodes the pattern 71 to obtain information. For example, the moving body 20 obtains the action instruction as the information from the identification pattern 72 printed on the action instruction card. The moving body 20 obtains the surrounding information from the surrounding pattern 73. Here, the moving body 20 detects the direction of the moving body 20 (for example, the angle A from the reference direction) by detecting the inclination of the pattern 71 in the image captured by the camera 24. The decoding can also be performed by other computers included in the toy system and connected to the moving body 20 for communication. In addition, when the moving body 20 passes on the card 30, the pattern 71 printed at different positions is read over time.

[0061] Next, control of the moving object 20 using the card 30 will be described. Figure 7 This is a diagram for explaining an example of the control of the moving body 20 by the action instruction card. Figure 7 In the example of , as action instruction cards, a card 30b of "Fast" and a card 30h of an arrow indicating the direction of travel are arranged. Figure 7 In the example of FIG. 1 , the moving body 20 first reads the pattern 71 on the card 30b, updates the parameters of the speed subgroup to the specified (faster) speed, and moves straight at the specified speed. Then, the pattern 71 on the card 30h is read, and the moving body 20 performs a movement of turning (direction change) so that the direction indicated by the pattern 71 and the moving direction of the moving body 20 form a specified angle (the moving body 20 moves in the direction of the arrow). When the direction change is completed, the moving body 20 moves straight in its moving direction.

[0062] like Figure 7 As shown in the example of FIG. 3 , the movement of the moving body 20 is controlled by the card 30. Figure 7 In the example of , the action instruction of the card 30, such as changing the driving parameters, is used, and then the moving body 20 moves according to the action instruction until it reaches the next card 30. Thus, the reading of the card 30 and the action interaction based thereon allow the user to experience more intuitive and easy programming.

[0063] Next, the processing for realizing the above-mentioned operation will be described in more detail. Figure 8 and 9 This is a flowchart showing an example of the processing of the moving object 20 . Figure 8 and9 The processing shown is realized by the processor 21 of the mobile body 20 executing the program stored in the memory 22. In addition, part of the processing may be realized by the processor 21 of another computer that is communicatively connected to the mobile body 20 and included in the toy system. Figure 8 and 9 The processing shown is repeatedly executed periodically (for example, every 0.1 seconds).

[0064] First, the processor 21 acquires the image read by the camera 24 of the mobile body 20 (S101). The processor 21 determines whether the information can be decoded based on the acquired image (S102). This process is to determine whether the pattern 71 exists in the acquired image. If the information cannot be decoded (N in S102), the processor 21 sets the same card flag to OFF and ends. Figure 8 and 9 On the other hand, if the information can be decoded (Y in S102), the processor 21 determines whether the decoded information is peripheral information (S104). Here, the determination can also be made based on whether the decoded information is within the range of values ​​indicating the card type. If the decoded information is peripheral information (Y in S104), the processor 21 sets the same card flag to OFF and ends. Figure 8 and 9 On the other hand, when the decoded information is not peripheral information (N of S104), the processor 21 determines whether the same instruction as the last time is decoded (S105). When the same instruction as the last time is not decoded (N of S105), S106 is skipped and the processing after S107 is executed. When the same instruction as the last time is decoded (Y of S105), the processor 21 determines whether the same card flag is set to ON (S106).

[0065] When the same card flag is set to ON (Y in S106), the processor 21 ends Figure 8 and 9 On the other hand, when the same card flag is set to OFF (N in S106), the processor 21 sets the same card flag to ON (S107). In addition, the processor 21 obtains an instruction (here, an action instruction) from the decoded card type and obtains the angle A of the moving body 20 relative to the card 30 (S108). Then, as shown in S111 and later, the processor 21 executes a process for moving the moving body 20 (a process for controlling the travel device, the speaker 26, etc.) according to the instruction.

[0066] Through the processing of S102 to S104 and S106 to S108, it is detected whether the card type information is obtained from the same card 30 as last time. If the card type information is obtained from the same card 30, the control based on the instruction indicated by the card type is not re-executed. In addition, if the card type information is obtained from a new card 30 through these processes, the control based on the instruction indicated by the card type is re-executed. The processing of S105 is a processing corresponding to the case where the mobile body 20 is moved by hand and the identification patterns 72 of two different types of cards 30 are forcibly read.

[0067] For example, when two cards 30 are arranged so that a part of them overlap, and the moving body 20 moves across the boundary, the patterns 71 printed on the two cards 30 are continuously read. However, after the inner area 31 of the first card 30 is read, the peripheral area 32 of any card 30 is read, and then the inner area 31 of the second card is read. When the peripheral area 32 is read, the same card flag that has been turned on (refer to S106) by the reading of the inner area 31 of the first card 30 is turned off (refer to S104 and S103), and the moving body 20 is controlled by the action instruction read from the inner area 31 of the second card 30. In this way, when the recognition pattern 72 is captured after the peripheral pattern 73 is captured by the camera 24, the processor 21 controls the action of the moving body 20 based on the captured recognition pattern 72. On the other hand, when the same recognition pattern 72 as the previous one is captured by the camera 24, the action of the moving body 20 is not controlled by reading the recognition pattern 72. In this way, the reading from a new card 30 can be detected by the peripheral area 32.

[0068] Alternatively, instead of using the same card mark, information decoded from the pattern 71 captured by the camera 24 in the previous process may be stored, and when the information decoded from the pattern 71 captured this time is different, processing for controlling the movement of the mobile body 20 corresponding to the decoded card type may be performed. In this case, when information cannot be decoded from the image, if virtual information is stored instead of the decoded information, it is possible to cope with a situation where the peripheral pattern 73 cannot be read for some reason.

[0069] return Figure 8 and 9 If the process of S107 is executed, the processor 21 determines whether the acquired action instruction belongs to the group of the state change system (S111). If the acquired action instruction belongs to the state change system (Y in S111), the processor 21 updates the driving parameter according to the action instruction (S112).

[0070] More specifically, the processor 21 updates the driving parameter of the subgroup that classifies the action instruction to the value indicated by the action instruction. When the action instruction belongs to the speed subgroup, the processor 21 sets the speed parameter to the value corresponding to the action instruction. When the action instruction belongs to the steering subgroup, the processor 21 updates the steering state parameter to the value indicated by the action instruction (for example, any one of right, left, and straight). When the action instruction belongs to the braking subgroup, the processor 21 updates the braking parameter to the braking state (or no braking state).

[0071] When the action instruction belongs to multiple subgroups, the processor 21 updates the driving parameters of each of the multiple subgroups to the values ​​indicated by the action instruction. For example, when the action instruction belongs to the speed subgroup and the steering subgroup, the processor 21 sets the speed parameter to the value corresponding to the action instruction and updates the steering state parameter to the value indicated by the action instruction. In this case, there may be multiple action instructions that correspond one-to-one to the combinations of candidate values ​​of the speed parameter (e.g., slow, fast, very fast) and candidate values ​​of the steering state parameter (e.g., right, left, straight). There may be cards 30 that correspond one-to-one to the multiple action instructions.

[0072] On the other hand, when the acquired action instruction does not belong to the state change system (N of S111), the processor 21 determines whether the acquired action instruction indicates an instruction to stop the moving body 20 (S113). When the action instruction indicates an instruction to stop the moving body 20 (Y of S113), the processor 21 ends the driving process and stops the moving body 20 (S114).

[0073] On the other hand, when the motion instruction does not indicate the instruction to stop the moving body 20 (N in S113), the processor 21 determines whether the acquired motion instruction belongs to the group of the motion system (S115). When the motion instruction does not belong to the group of the motion system (N in S115), the process ends. Figure 8 and 9 When the motion instruction belongs to the group of the motion system (Y in S115 ), the processor 21 controls the travel device so as to perform the motion corresponding to the motion instruction ( S116 ).

[0074] For the motion instructions of the motion system, especially the motion instructions such as the card 30h that turn the traveling direction to the specified direction, the processor 21 determines the rotation direction and rotation amount of the left and right motors 25 based on the angle read from the card 30. The rotation direction and rotation amount are determined in such a way that the direction of the rotating moving body 20 becomes a specified direction (for example, the direction of the arrow on the card 30h) relative to the card 30 whose angle is read. Then, the processor 21 rotates the left and right motors 25 in the determined rotation direction and rotation amount. When the rotation is completed, the driving corresponding to the driving parameter is restarted.

[0075] In response to the instruction to execute a programmed action such as rotation (spin), winding travel, or voice output in the motion system action instruction, the processor 21 first acquires the time-series control information recorded in the memory 22 in association with the motion system action instruction. Based on the time-series control information, the processor 21 controls at least one of the motor 25 and the speaker 26 to make the moving body 20 execute the programmed action. When the time-series control ends, the travel based on the travel parameter is restarted.

[0076] Next, the driving process is briefly described. In the driving process, the processor 21 executes the program stored in the memory 22 to control the driving device (for example, the motor 25) based on the driving parameters. Part of the processing can be implemented by the processor 21 of another computer that is connected to the mobile body 20 and included in the toy system. The following processing is performed regularly in the driving process.

[0077] The processor 21 continuously reduces the speed of the moving body 20 by subtracting a predetermined value from the value of the speed stored as the driving parameter when the braking state is set in the driving parameter. In addition, when the subtracted speed value is 0, the processor 21 stops the driving of the moving body 20 and brings the state of the moving body 20 into a stopped state. Moreover, the processor 21 determines the rotation speed of the left and right wheels 254 based on the value of the speed and the parameters of the steering state, and controls the rotation of the left and right motors 25 based on the determined rotation speed. The difference in the rotation speed between the left and right can make the moving body continue to bend to the left and right. By using the driving parameters, the moving body can be operated without any problem even if the action instruction read from the same card 30 is ignored, and even if the peripheral area 32 is used and multiple cards are used, accurate control can be performed.

Claims

1. A toy system, characterized in that: Include: A mobile body that is capable of self-propelled by rotating wheels; a card on which the moving body can travel, The card comprises one sheet or a plurality of overlapping sheets, The friction coefficient of the surface on the back side of the card is greater than the friction coefficient of the surface on the front side of the card.

2. The toy system according to claim 1, characterized in that The card includes: a sheet material serving as a base material; and two sheets material forming a surface on the front side and a surface on the back side of the card, respectively. The material of the sheet constituting the surface on the front side of the card is the same as the material of the sheet constituting the surface on the back side of the card.

3. The toy system according to claim 2, characterized in that The sheet constituting the surface on the front side of the card and the sheet constituting the surface on the back side of the card contain the same type of resin.

4. The toy system according to any one of claims 1 to 3, characterized in that The surface on the back side of the card is subjected to surface processing having a higher friction coefficient than the surface on the front side of the card.

5. The toy system according to claim 2, characterized in that A visually recognizable image is printed on the surface of the substrate.

6. The toy system according to claim 5, characterized in that A pattern is printed on the surface of the substrate, the pattern being readable by the moving body and encoding information for controlling the movement of the moving body.

7. The toy system according to claim 1, characterized in that The thickness of the card is less than 0.45 mm.

8. A card on which a self-propelled moving object can travel, characterized in that: The card comprises a sheet, or a plurality of overlapping sheets, The friction coefficient of the surface on the back side of the card is greater than the friction coefficient of the surface on the front side of the card.

9. The card according to claim 8, characterized in that A pattern is printed on the card. The pattern is readable by the moving body and is a pattern encoding information for controlling the movement of the moving body.

Images