Wireless power supply system for models

Abstract

To provide a non-contact power supply system for models that is excellent in power supply while taking into consideration the influence of electromagnetic waves on the surrounding area. [Solution] One aspect of the present invention is a power supply system for models that supplies power contactlessly from a power supply base to a model housed in a model case, wherein the model case has a case bottom having a case mounting surface and a case back surface, and a fixing portion for fixing the model, the power supply base has a base main body having a base mounting surface, a base back surface, and a positioning portion for the case bottom, and a transmitting coil for supplying power that is provided on the base main body, the model has a power consumption portion that has a receiving coil that receives magnetic flux generated in the transmitting coil and a load portion that operates by induced electromotive force generated in the receiving coil, the base main body has a central region that overlaps with the fixing portion in the base main body and an outer peripheral region outside the central region, and the transmitting coil has a coil conductor portion that is arranged in a spiral shape in the outer peripheral region with the central region at the center.

Description

[Technical Field]

[0001] The present invention relates to a contactless power supply system for models, which supplies power to models such as automobiles in a contactless manner. Mu It is related to. [Background technology]

[0002] As a technology for supplying power to a model contactlessly, Patent Document 1 discloses a contactless power supply system that can expand the range of power supply from a single power supply device, operate multiple loads simultaneously, and change the load placement at any time, as well as a diorama that uses the system.

[0003] Furthermore, Patent Document 2 discloses a contactless power supply system that supplies power using resonance phenomena such as magnetic field resonance and electric field resonance, a device used in the system, and a contactless power supply method used in the system and the device.

[0004] Furthermore, Patent Document 3 discloses a gaming body, gaming device, and gaming system that can be charged without restricting the movement of the gaming body or affecting other circuits, and that is easy to maintain.

[0005] Furthermore, Patent Document 4 discloses a contactless power supply system that can inexpensively and easily control the operation of multiple devices belonging to each group in a synchronized manner that differs from the operation of multiple devices belonging to other groups. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-006114 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-030317 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-334023 [Patent Document 4] Japanese Patent Application Laid-Open No. 2011-050163 Summary of the Invention [Problem to be solved by the invention]

[0007] When supplying power to a model or other object contactlessly to turn on lights, etc., it is important to set the area where power can be sent and received. In other words, if the area where power can be sent and received is small, the model's installation range will be restricted. On the other hand, if the area where power can be sent and received is large, electromagnetic waves will leak unnecessarily into the surrounding area, raising concerns about the impact on peripheral equipment.

[0008] The present invention aims to provide a contactless power supply system for models, a contactless power supply base for models, and a model that have excellent power supply performance while taking into account the effects of electromagnetic waves on the surrounding area, in a system for supplying power to models contactlessly. [Means for solving the problem]

[0009] One aspect of the present invention is a power supply system for a model that supplies power contactlessly from a contactless power supply base for a model to a model housed in a model case, the model case having a case bottom with a case mounting surface on which the model is placed and a case back surface opposite the case mounting surface, and a fixing portion provided approximately in the center of the case mounting surface for fixing the model, the contactless power supply base for a model having a base mounting surface on which the case bottom of the model case is placed, a base back surface opposite the base mounting surface, and a positioning portion for positioning the case bottom when placed on the base mounting surface. The model has a base body that receives magnetic flux generated by the transmitting coil and a power supply transmitting coil provided on the base body, and the model has a power consumption section that has a receiving coil that receives magnetic flux generated by the transmitting coil and a load section that operates by induced electromotive force generated in the receiving coil, and the base body has a central region that overlaps with the fixed section on the base body when the case bottom is placed on the base mounting surface and positioned by the positioning section, and an outer peripheral region outside the central region, and the transmitting coil has a coil conductor section that is arranged in a spiral shape with the central region at the center in the outer peripheral region.

[0010] With this configuration, by placing the model case containing the model on the base mounting surface of the contactless power supply base for models, power is supplied to the model inside the model case while the model remains housed in the model case. The model is fixed in a predetermined position on the model case by the fixing part, and the contactless power supply base for models is provided with a positioning part for positioning the model case. Therefore, simply by placing the model case on the contactless power supply base for models and positioning it using the positioning part, the receiving coil on the model is positioned within the range of magnetic flux generated by the transmitting coil of the contactless power supply base for models, and reliable power supply is achieved even in a narrow power supply range.

[0011] In the above-mentioned contactless power supply system for models, the fixing part has a connecting member that connects the model and the case bottom, the back side of the case bottom is concave, the case bottom is provided on the side of the case mounting surface and has a connecting recess into which the connecting member is fitted, and a connecting protrusion provided on the back side of the case opposite the connecting recess, the protruding height of the connecting protrusion is lower than the depth of the concave shape on the back side of the case, the base main body is provided in the central region of the base mounting surface and has a base recess that fits into the connecting protrusion when the case bottom is placed on the base mounting surface, and it is preferable that the coil conductor part is arranged in a spiral shape with the base recess at the center.

[0012] This allows the transmitter coil to be positioned without interfering with the position of the fixing part for fixing the model to the model case, effectively utilizing an area that is likely to become dead space. Also, by arranging the coil conductor part of the transmitter coil in a spiral shape with the base recess at the center, when the model case is placed on the wireless power transfer base for models, the front and rear positions of the model are positioned close to the coil conductor part, and reliable power supply is achieved by the receiver coil even when power consumption parts are placed in front and behind the center of the model.

[0013] In the above-mentioned contactless power supply system for models, the positioning part may be provided on the outer periphery of the base mounting surface of the base body and have a step part recessed from the base mounting surface, so that when the case bottom is placed on the base mounting surface, an edge part of the case bottom protruding from the back surface of the case bottom fits into the step part. This allows the model case to be placed on the contactless power supply base for models with the edge part of the case bottom fitting into the step part of the base body.

[0014] In the wireless power supply system for models, the length and width of the case bottom are preferably equal to the length and width of the base body including the step portion, so that when the model case is placed on the wireless power supply base for models, the model case and the wireless power supply base for models appear integrated.

[0015] In the wireless power supply system for models, the wireless power supply base for models preferably has a control unit that controls the power supply to the transmitting coil, and the control unit preferably stops the power supply to the transmitting coil when a predetermined time has elapsed, thereby suppressing the temperature rise of each part due to electromagnetic induction.

[0016] In the wireless power supply system for models, the control unit may start counting the predetermined time based on a change in the current in the transmitting coil caused by the approach of the receiving coil to the transmitting coil. In this way, the control unit detects that the model has been placed on the wireless power supply base for models from the change in the current in the transmitting coil, and automatically starts counting the power supply time.

[0017] In the above-mentioned wireless power supply system for models, the wireless power supply base for models may further include a control unit that controls the supply of current to the transmitting coil and a temperature sensor, and the control unit may perform control to stop the supply of current to the transmitting coil when a value detected by the temperature sensor exceeds a preset threshold value, thereby suppressing temperature increases in each part due to electromagnetic induction.

[0018] Another aspect of the present invention is a contactless power supply base for models that supplies power contactlessly to a model housed in a model case, comprising a base body having a base mounting surface on which the case bottom of the model case is placed, a base back surface opposite the base mounting surface, and a positioning portion that positions the case bottom when placed on the base mounting surface, and a transmitting coil for supplying power that is provided on the base body, wherein the base body has a central region having a base recess that fits with a case protrusion provided on the model case, and an outer peripheral region outside the central region, and the transmitting coil has a coil conductor portion that is arranged in a spiral shape in the outer peripheral region with the central region at the center.

[0019] With this configuration, by placing the model case containing the model on the base mounting surface of the non-contact power supply base for models, power is supplied to the model inside the model case while the model remains inside the model case. Because the non-contact power supply base for models is provided with a positioning part for positioning the model case, simply by placing the model case on the non-contact power supply base for models and positioning it using the positioning part, the receiving coil on the model is positioned within the area of the magnetic flux generated by the transmitting coil of the non-contact power supply base for models, ensuring reliable power supply.

[0020] The wireless power supply base for models preferably has a control unit that controls the power supply to the transmitting coil, and the control unit controls the power supply to the transmitting coil to stop when the power supply to the transmitting coil has been running for a predetermined time, thereby suppressing temperature increases in each part due to electromagnetic induction.

[0021] In the wireless power supply base for models, the control unit may start counting the predetermined time based on a change in the current in the transmitting coil, thereby detecting that the model has been placed on the wireless power supply base for models from a change in the current in the transmitting coil and automatically starting counting the power-on time.

[0022] The wireless power supply base for models may further include a control unit that controls the power supply to the transmitting coil and a temperature sensor, and the control unit may perform control to stop the power supply to the transmitting coil when a value detected by the temperature sensor exceeds a preset threshold value, thereby suppressing temperature increases in each part due to electromagnetic induction.

[0023] Another aspect of the present invention is a model that receives power contactlessly from a contactless power supply base for a model, comprising: a model body; a translucent member that covers a hole provided in at least one of the front and rear of the model body; and a light-emitting module that is arranged adjacent to the translucent member inside the model body, wherein the light-emitting module has a receiving coil that receives magnetic flux generated by a transmitting coil provided in the contactless power supply base for the model, and a light-emitting unit that operates by induced electromotive force generated in the receiving coil, wherein the light-emitting unit and receiving coil are aligned and integrated in the front-to-back direction of the model body, and the direction of the winding axis of the receiving coil is a direction that intersects the up-and-down direction of the model body.

[0024] With this configuration, the receiving coil and light emitting unit are arranged in the front-to-back direction of the model body and integrated into the light emitting module, and the direction of the winding axis of the receiving coil is oriented in a direction that intersects with the up-and-down direction of the model body, making it easy to incorporate the light emitting module inside the model body. [Effects of the Invention]

[0025] According to the present invention, it is possible to provide a contactless power supply system for models, a contactless power supply base for models, and a model that have excellent power supply capabilities while taking into account the effects of electromagnetic waves on the surrounding area, in a system for supplying power to models contactlessly. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a perspective view illustrating a configuration of a contactless power supply system for a model according to an embodiment of the present invention; [Figure 2] 1 is an exploded perspective view illustrating the configuration of a contactless power supply system for a model according to an embodiment of the present invention; [Figure 3]FIG. 1 is a perspective view illustrating a state in which the contactless power supply system for a model according to the present embodiment is operated. [Figure 4] FIG. 2 is a schematic cross-sectional view illustrating a power consumption unit provided in the model. [Figure 5] FIG. 2 is an exploded perspective view illustrating the configuration of a power supply base according to the present embodiment. [Figure 6] FIG. 1 is a schematic diagram illustrating the configuration of a model according to the present embodiment. [Figure 7] FIG. 4 is a schematic cross-sectional view illustrating a case bottom and a fixing portion. [Figure 8] FIG. 2 is a schematic cross-sectional view illustrating a power supply base. [Figure 9] FIG. 10 is a schematic cross-sectional view illustrating a state before the model case is placed on the power supply base. [Figure 10] FIG. 10 is a schematic cross-sectional view illustrating the state after the model case is placed on the power supply base. [Figure 11] 10 is a flowchart illustrating a control method (part 1) performed by a control unit. [Figure 12] 10 is a flowchart illustrating a control method (part 2) by the control unit. [Figure 13] 10 is a flowchart illustrating a control method (part 3) by the control unit. [Figure 14] FIG. 1 is a schematic cross-sectional view showing an example of a temperature sensor. DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same components will be designated by the same reference numerals, and the description of components that have already been described will be omitted as appropriate.

[0028] (Configuration of a contactless power supply system for models) FIG. 1 is a perspective view illustrating the configuration of a contactless power supply system for a model according to this embodiment. FIG. 2 is an exploded perspective view illustrating the configuration of the contactless power supply system for a model according to this embodiment. FIG. 3 is a perspective view illustrating a state in which the contactless power supply system for a model according to this embodiment is in operation. FIG. 4 is a schematic cross-sectional view illustrating a power consumption unit provided in the model.

[0029] The contactless power supply system 1 for a model according to this embodiment is a system that supplies power from a power supply base 10 to a model 300 housed in a model case 20 in a contactless manner. In this embodiment, the direction along the surface (base mounting surface 111) of the power supply base 10 on which the model case 20 is placed is referred to as the XY direction, and the direction perpendicular to the XY direction is referred to as the Z direction. The X1-X2 direction is also referred to as the front-to-back direction, the Y1-Y2 direction as the left-to-right direction, and the Z1-Z2 direction as the up-down direction. The top (upper side) on the Z1 side of the Z1-Z2 direction is also referred to as the front (upper side), and the bottom (lower side) on the Z2 side of the Z1-Z2 direction is also referred to as the back (back side).

[0030] The model case 20 is a box having a space inside for accommodating the model 300, and has a case bottom 210 and a cover 220 that covers the case bottom 210. The cover 220 is formed from a translucent (e.g., transparent) resin (acrylic, polycarbonate, etc.), and with the cover 220 covering the case bottom 210, the model 300 accommodated inside can be viewed from the outside.

[0031] The case bottom 210 is a bottom plate and has a case mounting surface 211 on which the model 300 is placed, and a case back surface 212 opposite the case mounting surface 211. A fixing portion 230 for fixing the model 300 placed on the case mounting surface 211 is provided approximately in the center of the case mounting surface 211.

[0032] The fixing part 230 has a connecting member 231 that connects the model 300 to the case bottom 210. The connecting member 231 is a member that fixes the model 300 to the case bottom 210 with a bolt 231b via, for example, a rectangular plate 231a. The plate 231a has a pin 231c standing thereon and a hole 231h through which the bolt 231b passes.

[0033] A rectangular connecting recess 211a is provided on the case mounting surface 211 of the case bottom 210, and a plate 231a can be fitted into the connecting recess 211a. That is, with the plate 231a fitted into the connecting recess 211a, a bolt 231b is passed through the hole 231h from the case back surface 212 and fastened to a screw hole 300a provided in the underside of the model 300. When the bolt 231b is fastened, a pin 231c is inserted into a hole 300b provided in the underside of the model 300. As a result, with the plate 231a of the connecting member 231 fitted into the connecting recess 211a of the case mounting surface 211, the model 300 is fixed to the case bottom 210 via the connecting member 231. At this time, the pin 231c is inserted into the hole 300b of the model 300, preventing the model 300 from rotating relative to the connecting member 231.

[0034] The side of the case bottom 210 facing the case back surface 212 is recessed. The case back surface 212 is provided with a connecting protrusion 213 that protrudes toward the case back surface 212 on the side opposite to the connecting recess 211a provided in the case mounting surface 211. The connecting protrusion 213 is rectangular and slightly larger than the connecting recess 211a. A frame-shaped edge 212a that protrudes downward is provided on the edge of the case back surface 212 that is recessed.

[0035] The power supply base 10 is an example of a contactless power supply base for models. The power supply base 10 has a base body 110 having a base mounting surface 111 on which a case bottom 210 of a model case 20 is placed, a base back surface 112 opposite to the base mounting surface 111, and a positioning portion 113 for positioning the case bottom 210 when placing it on the base mounting surface 111, and a transmission coil 120 for supplying power provided on the base body 110.

[0036] The positioning portion 113 has a step 113a provided on the outer periphery of the base mounting surface 111 of the base main body 110. The step 113a is a portion that is recessed from the base mounting surface 111 on the outer periphery of the base mounting surface 111. When the case bottom 210 of the model case 20 is placed on the base mounting surface 111, an edge 212a provided on the case back surface 212 fits into the step 113a. That is, the base mounting surface 111 (the portion that protrudes upward relative to the step 113a) that is more inward than the step 113a fits into a concave portion more inward than the edge 212a of the case back surface 212. This allows the model case 20 to be fixed in a state where it is superimposed on the power supply base 10.

[0037] The base body 110 of the power supply base 10 has a central region S1 that overlaps with the fixing portion 230 on the base body 110 when the case bottom 210 is placed on the base mounting surface 111 and positioned by the positioning portion 113, and a peripheral region S2 outside the central region S1.

[0038] A base recess 111a is provided in the central region S1 of the base mounting surface 111 to mate with a connecting protrusion 213 protruding downward from the case bottom 210. The transmitting coil 120 has a coil conductor 121 that is provided in a spiral shape in the outer circumferential region S2 with the central region S1 at the center.

[0039] Model 300 is provided with light-emitting module 310, which is an example of a power consumption unit. Fig. 4 shows an example of how light-emitting module 310 is attached. Light-emitting module 310 has receiving coil 311 that receives magnetic flux generated by transmitting coil 120, and light-emitting unit 312, which is an example of a load unit that operates by induced electromotive force generated in receiving coil 311. Model body 320 of model 300 is provided with hole 320h, which is covered with light-transmitting member 321. For example, light-transmitting member 321 corresponds to a headlight or taillight of a model automobile.

[0040] The light-emitting module 310 is disposed adjacent to the light-transmitting member 321 inside the model body 320. The light-emitting unit 312 and the receiving coil 311 are aligned in the front-to-rear direction of the model body 320 and are integrated. The direction of the winding axis AX of the receiving coil 311 is a direction that intersects with the up-and-down direction of the model body 320. For example, the direction of the winding axis AX of the receiving coil 311 is the front-to-rear direction (X1-X2 direction). The integration of the light-emitting unit 312 and the receiving coil 311 makes it easy to incorporate the light-emitting module 310 inside the model body 320.

[0041] 3, by placing model case 20 containing model 300 on base mounting surface 111 of power supply base 10, power is supplied to model 300 while it is still housed in model case 20. Model 300 is fixed to a predetermined position on model case 20 by fixing portion 230, and power supply base 10 is further provided with positioning portion 113 for positioning model case 20. Therefore, simply by placing model case 20 on power supply base 10 and positioning it with positioning portion 113, receiving coil 311 provided on the model 300 side is positioned within the area of magnetic flux generated by transmitting coil 120 of power supply base 10, and reliable power supply is achieved.

[0042] For example, by incorporating the light-emitting module 310 inside the headlights or taillights of a car model 300, the headlights or taillights of the model 300 inside the model case 20 can be turned on simply by placing the model case 20 on the power supply base 10 while the model 300 is still housed in the model case 20.

[0043] Furthermore, it is preferable that the external dimensions of the case bottom 210 in length and width (X1-X2 and Y1-Y2 directions) are equal to the external dimensions of the base body 110 in length and width (X1-X2 and Y1-Y2 directions) including the step portion 113a. This allows the model case 20 and the power supply base 10 to appear integrated when placed on the power supply base 10, improving the design.

[0044] (Power supply base configuration) FIG. 5 is an exploded perspective view illustrating the configuration of the power supply base according to this embodiment. The power supply base 10 includes a base body 110 and a transmitting coil 120. The transmitting coil 120 is, for example, a film type in which a pattern of a coil conductor portion 121 is formed on an insulating film 130. The film-type transmitting coil 120 is attached to the base back surface 112 side of the base body 110. By attaching the film-type transmitting coil 120, the coil conductor portion 121 of the transmitting coil 120 is arranged in a single spiral shape around the base recess 111a in the central region S1 and on the outer periphery thereof. In this way, the transmitting coil 120 is arranged without interfering with the fixed portion 230 of the model case 20 and the base recess 111a that overlaps the position of the fixed portion 230 in the vertical direction, and effectively utilizing an area that would otherwise be dead space.

[0045] A substrate 140 on which a circuit constituting a control unit 160 is mounted is provided on the rear surface 112 of the base. The control unit 160 controls the application of a predetermined amount of current and a predetermined pattern to the transmitting coil 120. An electromagnetic shielding unit (e.g., a ferrite sheet) 150 is preferably provided between the transmitting coil 120 and the substrate 140. This makes it possible to block electromagnetic waves leaking from the transmitting coil 120 toward the substrate 140. The rear surface 112 of the base is covered by a back cover 114 (see FIG. 8).

[0046] The power source for the current supplied from the control unit 160 to the transmitting coil 120 may be obtained externally or from a battery built into the base body 110. In this embodiment, the base body 110 is provided with a connector (for example, a USB connector) not shown, and power is obtained from a computer or a commercial power source via a cable (for example, a USB cable) 170.

[0047] (Model configuration) FIG. 6 is a schematic diagram illustrating the configuration of the model according to this embodiment. In this embodiment, the model 300 is a car model. The size of the car model is, for example, approximately 1 / 64, 1 / 43, 1 / 27, or 1 / 24. FIG. 6 shows a schematic plan view of the model 300 as seen from below. The model 300 has a model body 320. In the car model, the model body 320 is roughly divided into a front region (e.g., hood region), a rear region (e.g., trunk region), and a central region (e.g., cabin region), and two tires 330 are attached to each of the front region and the rear region (a total of four tires 330).

[0048] Holes 320h are provided in at least one of the front and rear of the model body 320. For example, in a car model, holes 320h are provided in portions corresponding to the front headlights and portions corresponding to the rear taillights. A light-transmitting member 321 is attached to each hole 320h. That is, a transparent light-transmitting member 321 is attached to the hole 320h corresponding to the headlights, and a red light-transmitting member 321 is attached to the hole 320h corresponding to the taillights.

[0049] A support frame 322 is provided inside model body 320 so as to be adjacent to light-transmitting member 321. A space is provided inside support frame 322, and light-emitting module 310 is housed in this space. For example, the size of light-emitting module 310 used for a 1 / 64 scale automobile model is approximately 10 mm in length in the direction in which light-emitting unit 312 and receiving coil 311 are aligned, and approximately 5 mm in thickness (diameter).

[0050] Because light-emitting module 310 has light-emitting unit 312 and receiving coil 311 integrated together, it can be easily incorporated into the space inside support frame 322. In other words, light-emitting module 310, in which light-emitting unit 312 and receiving coil 311 are integrated, simply needs to be fitted into the space inside support frame 322, and no wiring connection is required. Therefore, even in an existing model 300, light-emitting module 310 can be easily incorporated by simply attaching support frame 322 to model body 320.

[0051] In an automobile model, model body 320 is relatively longer in the front-to-rear direction than in the left-to-right direction. By utilizing such a feature of model body 320 and using light emitting module 310 in which light emitting unit 312 and receiving coil 311 are integrated in the front-to-rear direction, light emitting module 310 can be attached while effectively utilizing the limited space in model body 320. Furthermore, the direction of winding axis AX of receiving coil 311 of light emitting module 310 is a direction intersecting the up-and-down direction of model body 320 (for example, the front-to-rear direction). This makes it possible to arrange light emitting module 310 while effectively utilizing the length direction of model body 320, while the light emitting direction of light emitting unit 312 is the front-to-rear direction.

[0052] If the direction of winding axis AX of receiver coil 311 is in a direction (e.g., X1-X2 direction) that intersects with the up-and-down direction (e.g., Z1-Z2 direction) of model body 320, the direction will intersect with the direction of the winding axis of transmitter coil 120 of power supply base 10 (e.g., Z1-Z2 direction), which is disadvantageous for power supply by electromagnetic induction. However, in this embodiment, model case 20 to which model 300 is fixed is placed on power supply base 10, and coil conductor portion 121 of transmitter coil 120 is arranged in a spiral shape with base recess 111a at the center as shown in FIG. 5 , so that the front-to-rear position of model 300 is close to coil conductor portion 121, and reliable power supply is achieved even if the direction of winding axis AX of receiver coil 311 intersects with the direction of the winding axis of coil conductor portion 121.

[0053] (Case bottom and base body) FIG. 7 is a schematic cross-sectional view illustrating the case bottom and the fixing portion. As shown in FIG. 7 , the fixing part 230 has a connecting member 231 that connects the model 300 and the case bottom 210. A connecting recess 211a into which the connecting member 231 is fitted is provided on the case mounting surface 211 of the case bottom 210, and a connecting protrusion 213 that constitutes the connecting recess 211a is provided on the case back surface 212. A protruding height (length in the Z1-Z2 direction) d1 of the connecting protrusion 213 is smaller than a depth (length in the Z1-Z2 direction) d2 of the recessed shape on the case back surface 212 side. Note that, if the head of the bolt 231b protrudes downward from the connecting protrusion 213, a protruding height d3 including the head of the bolt 231b is set smaller than the depth d2 of the recessed shape. As a result, when the model 300 is fixed to the case bottom 210 by the fixing part 230, the connecting protrusion 213 and the bolt 231b fit inside the recessed shape of the case back surface 212.

[0054] FIG. 8 is a schematic cross-sectional view illustrating the power supply base. 8, the base mounting surface 111 is provided with a base recess 111a that fits with the connecting protrusion 213 of the case bottom 210 shown in Fig. 7. The depth (length in the Z1-Z2 direction) d4 of the base recess 111a is set to a depth that does not cause interference between the connecting protrusion 213 and the head of the bolt 231b when the case bottom 210 is mounted on the base mounting surface 111.

[0055] Further, a step 113a serving as a positioning portion 113 is provided on the outer periphery of the base mounting surface 111. The width w1 of the step 113a is approximately equal to the width w2 of the edge 212a of the case bottom 210 shown in FIG.

[0056] FIG. 9 is a schematic cross-sectional view illustrating a state before the model case is placed on the power supply base. FIG. 10 is a schematic cross-sectional view illustrating the state after the model case is placed on the power supply base. As shown in FIG. 9, the model 300 is housed in the model case 20 and fixed to the case mounting surface 211 by the fixing part 230, and the model case 20 is placed on the power supply base 10 with the model 300 housed in the model case 20.

[0057] 10, edge 212a of case bottom 210 fits into step 113a of base main body 110 and is positioned, and connecting protrusion 213 fits into base recess 111a. Model 300 is fixed to a predetermined position in model case 20 by fixing portion 230, and when model case 20 is placed on power supply base 10, edge 212a of case bottom 210 fits into step 113a, which is positioning portion 113, and is positioned accordingly. This determines the positional relationship between transmitter coil 120 of power supply base 10 and receiver coil 311 on the model 300 side, ensuring reliable power supply.

[0058] For example, by incorporating the light-emitting module 310 inside the headlights or taillights of a model automobile, the headlights or taillights of the model 300 inside the model case 20 can be turned on simply by placing the model case 20 on the power supply base 10 while the model 300 is still housed in the model case 20.

[0059] Considering the influence of electromagnetic waves on the surrounding area, it is not desirable to make the magnetic force generated from the transmitting coil 120 of the power supply base 10 too strong. For example, in the region above the base body 110, it is desirable to limit the region (power supply region) in which the magnetic flux from the transmitting coil 120 is received by the receiving coil 311 and the light emitting unit 312 can emit light within the inner region of the cover unit 220, preferably within the height of the model 300.

[0060] When the model 300 is a car model, the light-emitting module 310 is often disposed in front or rear of the model body 320, like a headlight or taillight. Therefore, the receiving coil 311 is also positioned in front or rear of the model body 320, away from the center. As described above, when the power supply area is narrowed in consideration of the impact on the surrounding area, the positional relationship of the model 300 with respect to the transmitting coil 120 becomes extremely important. In this embodiment, a single spiral coil conductor 121 is provided in the outer peripheral area S2, centered on a position (central area S1) that overlaps in the vertical direction with the fixing part 230 that fixes the model 300. Even if the light-emitting module 310 is disposed in a front-to-rear position away from the center of the model 300, the front-to-rear positions of the model are positioned close to the coil conductor 121, so that power can be reliably supplied to the light-emitting module 310 even in a narrow power supply area.

[0061] (Control method by the control unit) FIG. 11 is a flowchart illustrating a control method (part 1) by the control unit. First, as shown in step S101, the control unit 160 starts energizing the transmission coil 120. Next, as shown in step S102, the control unit 160 starts a timer to start counting a predetermined time period.

[0062] Next, as shown in step S103, the control unit 160 determines whether a predetermined time has elapsed since the start of the timer. If the predetermined time has not elapsed, the control unit 160 continues to energize the transmission coil 120. If the predetermined time has elapsed, the control unit 160 stops energizing the transmission coil 120 as shown in step S104.

[0063] By such control, when a predetermined time has elapsed since the start of energization to the transmission coil 120, the energization to the transmission coil 120 is automatically stopped, thereby suppressing heat generation in each part due to electromagnetic induction.

[0064] FIG. 12 is a flowchart illustrating a control method (part 2) by the control unit. First, as shown in step S201, the control unit 160 starts supplying current to the transmitting coil 120. Next, as shown in step S202, the control unit 160 determines whether or not there has been a change in the amount of current flowing through the transmitting coil 120. That is, when the model case 20 is placed on the power supply base 10 and the receiving coil 311 on the model 300 side enters the area of the magnetic field generated by the transmitting coil 120 (the receiving coil 311 approaches the transmitting coil 120), a change occurs in the amount of current flowing through the transmitting coil 120 due to the influence of the magnetic field caused by the electromotive force generated by the receiving coil 311. The control unit 160 detects this change in the amount of current flowing through the transmitting coil 120 and determines whether or not the model case 20 (model 300) has been placed on the power supply base 10.

[0065] If there is a change in the current of the transmitting coil 120, the process proceeds to step S203, where the control unit 160 starts a timer to begin counting a predetermined time. If there is no change in the current of the transmitting coil 120, the timer is not started.

[0066] If the timer is started in step S203, then as shown in the next step S204, the control unit 160 determines whether a predetermined time has elapsed since the timer started. If the predetermined time has not elapsed, the control unit 160 continues to energize the transmission coil 120. If the predetermined time has elapsed, the control unit 160 stops energizing the transmission coil 120 as shown in step S205.

[0067] With this control, the placement of the model case 20 (model 300) on the power supply base 10 is detected from a change in current in the transmitting coil 120, and a timer is started when the model case 20 (model 300) is placed on the power supply base 10. When a predetermined time has elapsed since the model case 20 (model 300) was placed on the power supply base 10, the power supply to the transmitting coil 120 is automatically stopped. This suppresses heat generation in each part due to electromagnetic induction after the model case 20 (model 300) is placed on the power supply base 10.

[0068] FIG. 13 is a flowchart illustrating a control method (part 3) by the control unit. FIG. 14 is a schematic cross-sectional view showing an example of a temperature sensor. A third control method by the control unit 160 shown in FIG. 13 uses a temperature sensor 180 shown in FIG. 14. The temperature sensor 180 is provided, for example, in the base recess 111a of the base body 110. When the connecting protrusion 213 is fitted into the base recess 111a, the bolt 231b and the temperature sensor 180 come into contact. The metal bolt 231b comes into contact with the temperature sensor 180, allowing the temperature of the model 300 to be detected accurately via the bolt 231b. Because the magnetic flux is weak in the center of the coil conductor 121, the metal bolt 231b placed in that position is less susceptible to electromagnetic induction and more easily transmits the temperature of the model 300. Note that the temperature sensor 180 is not limited to this position and may be provided in any position where it can detect the temperature of the model 300.

[0069] FIG. 13 shows an example of a control method by the control unit 160 using the temperature sensor 180. First, as shown in step S301, the control unit 160 starts supplying current to the transmitting coil 120. Next, as shown in step S302, the control unit 160 determines whether a numerical value based on a value detected by the temperature sensor 180 exceeds a preset threshold value. If the threshold value is not exceeded, the control unit 160 continues supplying current to the transmitting coil 120. On the other hand, if the threshold value is exceeded, the control unit 160 stops supplying current to the transmitting coil 120 as shown in step S303.

[0070] After stopping the power supply to the transmitting coil 120, the control unit 160 determines whether or not a numerical value based on a value detected by the temperature sensor 180 has become equal to or less than a preset threshold value, as shown in step S304. If the numerical value has not become equal to or less than the threshold value, the power supply to the transmitting coil 120 continues to be stopped. On the other hand, if the temperature has become equal to or less than the threshold value, the control unit 160 resumes the power supply to the transmitting coil 120, as shown in step S305. Thereafter, the control unit 160 may repeat the processes from step S302 to step S305.

[0071] By such control, the power supply to the transmission coil 120 is controlled based on the temperature of the model 300 detected by the temperature sensor 180. This suppresses heat generation in each part due to electromagnetic induction.

[0072] In addition, by making the plate 231a and the pin 231c, as well as the bolt 231b shown in FIG. 14, out of metal, heat from the model 300 is more easily transmitted to the temperature sensor 180 via the metal bolt 231b, plate 231a and pin 231c, making it possible to detect the temperature of the model 300 with higher accuracy.

[0073] When power is supplied by electromagnetic induction, the receiving coil 311 generates heat due to electromotive force caused by the magnetic field generated by the transmitting coil 120. Heat is easily transferred from the receiving coil 311 to components containing metal, such as the die-cast metal model body 320 of a model car or other such item. Also, depending on the type of metal, the component itself may generate heat when exposed to the magnetic flux generated by the transmitting coil 120. By controlling the power supply to the transmitting coil 120 with the control unit 160, heat generation in components such as the receiving coil 311 and model body 320 is suppressed, allowing users to enjoy the experience with peace of mind.

[0074] As described above, according to the embodiment, in a system for supplying power to a model 300 contactlessly, it is possible to provide a contactless power supply system 1 for a model, a power supply base 10, and a model 300 that have excellent power supply performance while taking into account the influence of surrounding electromagnetic waves.

[0075] Although the present embodiment has been described above, the present invention is not limited to these examples. For example, while the above describes an electromagnetic induction-type contactless power supply system 1 for models and a power supply base 10, a magnetic resonance-type system may also be used. Furthermore, while the light-emitting module 310 is used as an example of a power consumption unit, this is not limiting. The load unit may be a motor or another load unit, such as a speaker or other device that outputs sound. Furthermore, additions, deletions, or design changes to the above-described embodiments by a person skilled in the art, as well as appropriate combinations of features of the respective embodiments, are also encompassed within the scope of the present invention as long as they incorporate the gist of the present invention. [Industrial Applicability]

[0076] The present invention can be applied to models 300 other than automobiles, such as trains, airplanes, and ships. [Explanation of symbols]

[0077] 1. Wireless power supply system for models 10...Power supply base (non-contact power supply base for models) 20...Model case 110...Base body 111...Base mounting surface 111a...base recess 112...Back of base 113... Positioning part 113a...Stepped section 114...Back cover 120...Transmitting coil 121...Coil conductor 130...Insulating film 140...Substrate 150...Electromagnetic shielding section 160...Control unit 170…Cable 180...Temperature sensor 210…Case bottom 211...Case mounting surface 211a...connecting recess 212…Case back 212a...Edge 213...Connecting protrusion 220...Cover part 230…Fixed part 231...Connecting member 231a...Plate 231b...Bolt 231c…Pin 231h…hole 300...Model 300a...screw hole 300b…hole 310...Light emitting module 311...receiving coil 312...Light emitting part 320...Model body 320h…hole 321...Translucent member 322...Support frame 330...Tire AX…Reel shaft S1…Central area S2…outer area d1, d3...protrusion height d2,d4...depth w1, w2...width

Claims

1. A power supply system for a model that supplies power from a power supply base to a model housed in a model case in a non-contact manner, The model case is a case bottom having a case mounting surface on which the model is placed and a case back surface opposite the case mounting surface; a fixing portion provided at approximately the center of the case mounting surface for fixing the model; The power supply base is a base body having a base mounting surface on which the case bottom of the model case is placed, a base back surface opposite to the base mounting surface, and a positioning portion for positioning the case bottom when placed on the base mounting surface; a transmission coil for supplying power provided on the base body, the model has a power consumption unit including a receiving coil that receives magnetic flux generated by the transmitting coil and a load unit that operates by induced electromotive force generated in the receiving coil, the base body has a central region that overlaps with the fixing portion of the base body when the case bottom is placed on the base mounting surface and the case bottom is positioned by the positioning portion, and an outer peripheral region outside the central region, The transmitting coil has a coil conductor portion that is arranged in a spiral shape in the outer peripheral region with the central region as the center.

2. the fixing portion has a connecting member that connects the model and the case bottom portion, The case bottom has a concave shape on the back surface side of the case, The case bottom is a connecting recess provided on the case mounting surface and adapted to fit the connecting member; a connecting protrusion provided on the rear surface of the case on the opposite side of the connecting recess, The protruding height of the connecting protrusion is smaller than the depth of the recessed shape on the rear surface of the case, The base body is a base recess provided in the central region of the base mounting surface, the base recess being fitted into the connecting protrusion when the case bottom is placed on the base mounting surface; 2. The wireless power supply system for a model according to claim 1, wherein the coil conductor is provided in a spiral shape with the base recess at its center.

3. the positioning portion is provided on the outer periphery of the base mounting surface of the base main body and has a step portion recessed from the base mounting surface, 3. The wireless power supply system for models according to claim 1, wherein when the case bottom is placed on the base mounting surface, an edge portion of the case bottom protruding toward the case back surface fits into the step portion.

4. 4. The contactless power supply system for a model according to claim 3, wherein the outer dimensions of the case bottom are equal to the outer dimensions of the base body including the step portion.

5. the power supply base has a control unit that controls power supply to the transmission coil, 2. The wireless power supply system for a model according to claim 1, wherein the control unit performs control to stop the power supply to the transmitting coil when a predetermined time has elapsed since the power supply to the transmitting coil.

6. 6. The contactless power supply system for a model according to claim 5, wherein the control unit performs control to start counting the predetermined time based on a change in current in the transmitting coil caused by the receiving coil approaching the transmitting coil.

7. The power supply base is a control unit that controls energization of the transmitting coil; a temperature sensor, 2. The wireless power supply system for a model according to claim 1, wherein the control unit performs control to stop the power supply to the transmitting coil when a value detected by the temperature sensor exceeds a preset threshold value.

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