A dynamic display device for model vehicles

Abstract

The utility model relates to a car model technical field especially relates to a model car dynamic display device, including the front roller shaft part for supporting model car front wheel, the rear roller shaft part for supporting model car rear wheel, front motor, front motor transmission spare, rear motor, rear motor transmission spare and PCB circuit board, set up control circuit and through slot on the PCB circuit board, the front roller shaft part and / or the rear roller shaft part are worn in the through slot and can slide along the through slot before and after, when model car is placed on this model car dynamic display device, and through control circuit starts front motor and rear motor, front motor drives the front roller shaft part rotation through front motor transmission spare, at the same time, rear motor drives the rear roller shaft part rotation through rear motor transmission spare, finally realizes model car's dynamic display function. This model car dynamic display device has also realized the organic combination of wheel base flexible adjustment and simple structure, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of automobile model technology, and in particular to a dynamic display device for model cars. Background Technology

[0002] Small-scale model cars are beloved by model car enthusiasts for their compact size and highly realistic structural design. These models not only boast exquisite exteriors but also detailed internal structures, making them popular for display and possessing significant collectible value. To better showcase these models, many enthusiasts and manufacturers equip their vehicles with dedicated display platforms to meet the needs of multi-angle viewing. However, most model car display platforms currently on the market are primarily static. While they effectively secure the models and ensure their stability, they lack dynamic display capabilities, limiting the expressiveness of the models and the viewing experience. Dynamic display refers to the ability of the model car's wheels to rotate freely on the display platform, simulating the dynamic effect of tires rolling when a real vehicle is in motion, thereby enhancing the realism of the display.

[0003] With the continuous development of the model car market and the increasing demands of users, some display platforms have gradually begun to introduce dynamic display functions to enhance the viewing experience. However, in practical applications, these display platforms still have shortcomings, especially in wheelbase adjustment. This results in a display platform only being able to accommodate models of fixed sizes, making it difficult to meet the diverse display needs of model cars with different wheelbases. For example, some display platforms use a double-row comb-tooth staggered structure to cover the gap between the front and rear axles of the model car. While this can improve the stability of the model car, it also greatly restricts the axial movement range, making wheelbase adjustment inconvenient, limiting the compatibility of the display platform with model cars of different wheelbases, and reducing its flexibility of use. Utility Model Content

[0004] In view of this, the present invention proposes a dynamic display device for model cars, which aims to solve the problem of inconvenient wheelbase adjustment of existing model car display platforms.

[0005] This utility model proposes a dynamic display device for a model car, including a front roller for supporting the front wheels of the model car, a rear roller for supporting the rear wheels of the model car, a front motor, a front motor transmission component, a rear motor, a rear motor transmission component, and a PCB circuit board. The front roller is located at the front end of the PCB circuit board and is connected to the front motor via the front motor transmission component. The rear roller is located at the rear end of the PCB circuit board and is connected to the rear motor via the rear motor transmission component. The PCB circuit board has a control circuit and a through slot. The front roller and / or the rear roller passes through the through slot and can slide back and forth along the through slot. The control circuit is electrically connected to both the front motor and the rear motor. When the control circuit activates the front motor and the rear motor, the front motor drives the front roller to rotate via the front motor transmission component, thereby driving the front wheels of the model car to rotate. Simultaneously, the rear motor drives the rear roller to rotate via the rear motor transmission component, thereby driving the rear wheels of the model car to rotate.

[0006] In one possible implementation, the front roller portion is fixedly connected to the PCB circuit board, and the rear roller portion passes through the through groove and can slide back and forth along the through groove.

[0007] In one possible implementation, the rear roller portion includes a connector, a first connecting shaft, a second connecting shaft, a first cylindrical roller, a second cylindrical roller, a first transmission belt, and a second transmission belt; wherein, the connector passes through the through groove and can slide back and forth along the through groove, the first connecting shaft and the second connecting shaft are rotatably connected to the connector and are arranged horizontally parallel to each other, the first cylindrical roller is sleeved on the outside of the first connecting shaft, the first cylindrical roller is a cylindrical structure with a uniform diameter, the second cylindrical roller is sleeved on the outside of the second connecting shaft, the second cylindrical roller is a cylindrical structure with the diameters at both ends being larger than the diameter in the middle, the rear motor is connected to the connector, the first transmission belt is wound around the outside of the rear motor drive component and the first cylindrical roller, and the second transmission belt is wound around the outside of the rear motor drive component and the second cylindrical roller.

[0008] In one possible implementation, the through slot includes a left slot and a right slot with identical structures and arranged parallel to each other. The connector includes a left piece and a right piece with identical structures and arranged symmetrically. The left piece passes through the left slot and can slide back and forth along the left slot. The right piece passes through the right slot and can slide back and forth along the right slot. The left end of the first connecting shaft is rotatably connected to the left piece. The right end of the first connecting shaft is rotatably connected to the right piece. The left end of the second connecting shaft is rotatably connected to the left piece. The right end of the second connecting shaft is rotatably connected to the right piece.

[0009] In one possible implementation, the rear motor includes a left motor and a right motor with identical structures and symmetrically arranged. The rear motor transmission components include a left transmission component and a right transmission component with identical structures and symmetrically arranged. The left motor is connected to the left component, and the right motor is connected to the right component. The first transmission belt is wound around the outside of the left transmission component and the first cylindrical roller, and the second transmission belt is wound around the outside of the right transmission component and the second cylindrical roller. The left transmission component and the right transmission component are independently arranged and partially in contact.

[0010] In one possible implementation, the connector includes a connecting part and a fixing part. The connecting part is located above the PCB circuit board, and the bottom of the connecting part is provided with a groove. The top of the fixing part is provided with a protrusion, which passes through the through groove and is engaged with the groove.

[0011] In one possible implementation, both the groove and the protrusion are provided with screw holes, and the groove and the protrusion are connected by screws through the screw holes.

[0012] In one possible implementation, both the front and rear ends of the protrusion are provided with wedge-shaped structures, which are arranged along the front-rear direction.

[0013] In one possible implementation, the model car dynamic display device further includes elastic contacts, through which both the front motor and the rear motor are electrically connected to the PCB circuit board.

[0014] In one possible implementation, a battery mounting position is provided on the PCB circuit board, and the model car dynamic display device further includes a battery, which is disposed in the battery mounting position and electrically connected to the control circuit.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: A dynamic display device for a model car includes a front roller for supporting the front wheels of the model car, a rear roller for supporting the rear wheels of the model car, a front motor, a front motor transmission component, a rear motor, a rear motor transmission component, and a PCB circuit board; wherein, the front roller is located at the front end of the PCB circuit board, and the front roller is connected to the front motor through the front motor transmission component; the rear roller is located at the rear end of the PCB circuit board, and the rear roller is connected to the rear motor through the rear motor transmission component; the PCB circuit board is provided with a control circuit and a through slot; the front roller... The front and / or rear roller portions pass through the through slot and can slide back and forth along the through slot. The control circuit is electrically connected to the front motor and the rear motor, respectively. When the model car is placed on the dynamic display device and the front and rear motors are started by the control circuit, the front motor drives the front roller portion to rotate through the front motor transmission component, so that the front roller portion drives the front wheels of the model car to rotate. At the same time, the rear motor drives the rear roller portion to rotate through the rear motor transmission component, so that the rear roller portion drives the rear wheels of the model car to rotate, ultimately realizing the dynamic display function of the model car. In addition, the front roller portion and / or the rear roller portion pass through the through slot directly opened on the PCB circuit board and can slide back and forth along the through slot, thereby changing the distance between them and realizing flexible adjustment of the wheelbase to meet the diverse display needs of model cars with different wheelbases, significantly improving the adaptability of the dynamic display device to model cars with different wheelbases. Furthermore, directly incorporating through slots into the PCB circuit board simplifies the overall structure of the dynamic display device for the model car, eliminating the need for additional sliding components. This not only enhances the integration of the dynamic display device but also simplifies manufacturing and assembly. Clearly, this dynamic display device achieves a seamless integration of flexible wheelbase adjustment and structural simplicity while ensuring effective dynamic display of the model car, significantly improving its practicality and user experience. Attached Figure Description

[0016] Figure 1 A first structural schematic diagram of the model car dynamic display device provided in this embodiment of the utility model;

[0017] Figure 2 A second structural schematic diagram of the model car dynamic display device provided in this embodiment of the utility model;

[0018] Figure 3 This is a structural disassembly diagram of the model car dynamic display device provided in an embodiment of the present utility model;

[0019] Figure 4 A first structural disassembly diagram of the rear roller portion (removable fixing portion), rear motor, rear motor transmission component, and elastic contact provided in an embodiment of this utility model;

[0020] Figure 5 A second structural disassembly diagram of the rear roller (removable fixing part), rear motor, rear motor transmission component and elastic contact provided in the embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the fixing part provided in an embodiment of the present utility model.

[0022] The annotations in the attached figures are explained as follows:

[0023] 10. Front roller section; 20. PCB circuit board; 21. Left groove; 22. Right groove; 31. First connecting shaft; 32. Second connecting shaft; 33. First cylindrical roller; 34. Second cylindrical roller; 35. First transmission belt; 36. Second transmission belt; 41. Left machine; 42. Right machine; 43. Left transmission component; 44. Right transmission component; 50. Connecting part; 51. Upper left part; 52. Upper right part; 60. Fixing part; 61. Wedge structure; 70. Screw hole; 80. Elastic contact; 90. Battery mounting position. Detailed Implementation

[0024] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and sliding situation between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Please refer to Figure 1-3As shown, this utility model proposes a dynamic display device for a model car, including a front roller section 10 for supporting the front wheels of the model car, a rear roller section for supporting the rear wheels of the model car, a front motor, a front motor transmission component, a rear motor, a rear motor transmission component, and a PCB circuit board 20; wherein, the front roller section 10 is located at the front end of the PCB circuit board 20, and the front roller section 10 is connected to the front motor through the front motor transmission component; the rear roller section is located at the rear end of the PCB circuit board 20, and the rear roller section is connected to the rear motor through the rear motor transmission component; the PCB circuit board 20... A control circuit and a through groove are provided on the 0. The front roller part 10 and / or the rear roller part are inserted through the through groove and can slide back and forth along the through groove. The control circuit is electrically connected to the front motor and the rear motor respectively. When the control circuit starts the front motor and the rear motor, the front motor drives the front roller part 10 to rotate through the front motor transmission component, so that the front roller part 10 drives the front wheel of the model car to rotate. At the same time, the rear motor drives the rear roller part to rotate through the rear motor transmission component, so that the rear roller part drives the rear wheel of the model car to rotate.

[0028] Specifically, the model car dynamic display device, also known as a dynamometer, is not only used for the dynamic display of model cars but also for testing their performance. This dynamic display device simulates the front and rear wheel drive of a real vehicle, using independent front and rear motors to enhance the realism of the dynamic display and the accuracy of the testing. The front roller section 10 and / or the rear roller section pass through a through-slot directly opened on the PCB circuit board 20 and can slide back and forth along the through-slot, facilitating individual or simultaneous adjustment of the positions of the front and rear roller sections to accommodate model cars with different wheelbases. The through-slot is a strip-shaped groove, which, compared to traditional slot designs, is more conducive to the installation and position adjustment of the front and rear roller sections, avoiding the jamming and positioning errors that may occur during slot adjustments, thus improving the flexibility and stability of the adjustment. Moreover, slot processing usually requires a higher thickness of the PCB circuit board 20 material, making processing more difficult, while the through-slot has lower thickness requirements and is easier to process. Preferably, the thickness of the PCB circuit board 20 in this embodiment is 1.6 mm.

[0029] Compared with existing technologies, the dynamic display device for model cars proposed in this embodiment features a front roller section 10 and a rear roller section, each driven by a corresponding motor via a motor transmission component to rotate the model car wheels, thus providing a dynamic display function. Furthermore, the front roller section 10 and / or the rear roller section pass through a through-slot directly formed on the PCB circuit board 20 and can slide back and forth along the slot, thereby changing the distance between them and achieving flexible adjustment of the wheelbase. This meets the diverse display needs of model cars with different wheelbases, significantly improving the adaptability of the dynamic display device to model cars with different wheelbases. Moreover, directly setting the through-slot on the PCB circuit board 20 further simplifies the overall structure of the dynamic display device, eliminating the need for additional sliding components. This not only improves the integration of the dynamic display device but also facilitates manufacturing and assembly. Therefore, this dynamic display device for model cars achieves an organic combination of flexible wheelbase adjustment and structural simplicity while ensuring the dynamic display effect of the model car, greatly enhancing its practicality and user experience.

[0030] In some embodiments of this application, the front roller portion 10 is fixedly connected to the PCB circuit board 20, and the rear roller portion passes through the through groove and can slide back and forth along the through groove.

[0031] Specifically, the front roller section 10 is fixedly connected to the PCB circuit board 20 to ensure its stable position, which is beneficial to the rigidity and precision of the overall structure. The rear roller section passes through the through slot and can slide back and forth along the slot to achieve flexible adjustment of the wheelbase, making it easy to adapt to model cars with different wheelbases. Although the two have different functions, their structural designs can be kept consistent for ease of manufacturing and maintenance. In addition, the front roller section 10 can also be installed and fixed through the through slot, only needing to restrict its sliding function to ensure its fixed position, thus taking into account both structural uniformity and functional requirements.

[0032] In some embodiments of this application, the rear roller portion includes a connector, a first connecting shaft 31, a second connecting shaft 32, a first cylindrical roller 33, a second cylindrical roller 34, a first transmission belt 35, and a second transmission belt 36; wherein, the connector passes through the through groove and can slide back and forth along the through groove, the first connecting shaft 31 and the second connecting shaft 32 are rotatably connected to the connector and are arranged horizontally parallel, the first cylindrical roller 33 is sleeved on the outside of the first connecting shaft 31, the first cylindrical roller 33 is a cylindrical structure with a uniform diameter, the second cylindrical roller 34 is sleeved on the outside of the second connecting shaft 32, the second cylindrical roller 34 is a cylindrical structure with the diameters at both ends being larger than the diameter in the middle, the rear motor is connected to the connector, the first transmission belt 35 is wound around the outside of the rear motor transmission component and the first cylindrical roller 33, and the second transmission belt 36 is wound around the outside of the rear motor transmission component and the second cylindrical roller 34.

[0033] For details, please refer to Figure 4-5 As shown, when the control circuit starts the rear motor, the rear motor sequentially drives the first cylindrical roller 33 to rotate through the rear motor transmission component and the first transmission belt 35. Simultaneously, the rear motor sequentially drives the second cylindrical roller 34 to rotate through the rear motor transmission component and the second transmission belt 36, so that the first cylindrical roller 33 and the second cylindrical roller 34 jointly drive the rear wheel of the model car to rotate. The connecting component, as the core load-bearing component of the entire rear roller assembly, undertakes the function of fixing and connecting the various components. The first cylindrical roller 33 is sleeved on the outside of the first connecting shaft 31, and the two can rotate synchronously. The second cylindrical roller 34 is sleeved on the outside of the second connecting shaft 32, and the two can rotate synchronously. The first cylindrical roller 33 and the second cylindrical roller 34 are arranged horizontally and parallel to each other, so that the rear wheel can be stably confined between the two cylindrical rollers, which helps to ensure the balance and stability of the rear wheel of the model car during display or testing, ensuring the reliability of the display and the accuracy of the test. The first cylindrical roller 33 is a cylinder with a uniform diameter, which can provide uniform support and rotation surface for the rear wheel of the model car, suitable for the contact requirements of standard tires. The second cylindrical roller 34 is composed of two symmetrical truncated cones joined together, forming a structure that narrows in the middle and widens at both ends. This effectively prevents the tires of the model car from slipping laterally (left-right) during rotation, improving tire guidance and stability. Preferably, the first cylindrical roller 33 is positioned on the outer side, and the second cylindrical roller 34 on the inner side. This not only facilitates stable tire rolling but also provides some shielding and protection for the tires, preventing lateral (front-back) displacement. In terms of power transmission, the power from the rear motor is transmitted to the first cylindrical roller 33 and the second cylindrical roller 34 via the first transmission belt 35 and the second transmission belt 36, respectively, achieving synchronous drive. Belt drives are simple in structure, low in noise, easy to maintain, and have minimal power loss. To ensure stable operation of the transmission belts, the first cylindrical roller 33, the second cylindrical roller 34, and the rear motor transmission components are all provided with annular grooves. The transmission belt is securely engaged in these annular grooves, effectively preventing displacement during transmission and improving transmission reliability.

[0034] In some embodiments of this application, the through groove includes a left groove 21 and a right groove 22 with identical structures and arranged parallel to each other. The connecting member includes a left member and a right member with identical structures and arranged symmetrically. The left member passes through the left groove 21 and can slide back and forth along the left groove 21. The right member passes through the right groove 22 and can slide back and forth along the right groove 22. The left end of the first connecting shaft 31 is rotatably connected to the left member. The right end of the first connecting shaft 31 is rotatably connected to the right member. The left end of the second connecting shaft 32 is rotatably connected to the left member. The right end of the second connecting shaft 32 is rotatably connected to the right member.

[0035] Specifically, both the left groove 21 and the right groove 22 are through grooves, and both the left and right parts are connecting parts. Due to the connection of the first connecting shaft 31 and the second connecting shaft 32, the left and right parts can slide synchronously back and forth, significantly reducing the risk of misalignment and ensuring the consistency of shaft pitch adjustment. The rear roller section adopts a symmetrical and consistent layout of connecting parts and through grooves, which makes the force on both sides even, effectively avoiding structural deformation or damage caused by excessive force on one side, thereby significantly improving the stability of the overall mechanical structure.

[0036] In some embodiments of this application, the rear motor includes a left motor 41 and a right motor 42 with identical structures and symmetrically arranged. The rear motor transmission components include a left transmission component 43 and a right transmission component 44 with identical structures and symmetrically arranged. The left motor 41 is connected to the left component, and the right motor 42 is connected to the right component. The first transmission belt 35 is wound around the outside of the left transmission component 43 and the first cylindrical roller 33, and the second transmission belt 36 is wound around the outside of the right transmission component 44 and the second cylindrical roller 34. The left transmission component 43 and the right transmission component 44 are independently arranged and partially in contact.

[0037] Specifically, both the left motor 41 and the right motor 42 are motors located at the rear end of the PCB circuit board 20, and both the left transmission component 43 and the right transmission component 44 are rear motor transmission components. Preferably, both the left transmission component 43 and the right transmission component 44 are cylindrical structures, with one bottom surface of the left transmission component 43 and one bottom surface of the right transmission component 44 in contact. When the control circuit starts the left motor 41 and the right motor 42, the left motor 41 drives the first cylindrical roller 33 to rotate sequentially through the left transmission component 43 and the first transmission belt 35, while the right motor 42 drives the second cylindrical roller 34 to rotate sequentially through the right transmission component 44 and the second transmission belt 36, so that the first cylindrical roller 33 and the second cylindrical roller 34 jointly drive the rear wheels of the model car to rotate. The symmetrically arranged motors and transmission components match the symmetrical through-slot structure, ensuring the balance and stability of the overall mechanical structure. The independently arranged left transmission component 43 and right transmission component 44 drive the first cylindrical roller 33 and the second cylindrical roller 34 to rotate respectively through the first transmission belt 35 and the second transmission belt 36. Although the two motors (left motor 41 and right motor 42) operate independently, the partial contact design of the two transmission components allows for coordinated power output from both sides, effectively improving transmission synchronicity. This design ensures the independence of motor operation, avoiding mutual interference, while also achieving balance and coordination of power output through mechanical structure, guaranteeing the balance and stability of the transmission system.

[0038] In some embodiments of this application, the connector includes a connecting part 50 and a fixing part 60. The connecting part 50 is located above the PCB circuit board 20, and a groove is provided at the bottom of the connecting part 50. A protrusion is provided at the top of the fixing part 60, and the protrusion passes through the through groove and is engaged with the groove.

[0039] Specifically, the engaging relationship between the protrusion and the groove enables mechanical locking, effectively preventing the connector from slipping or loosening during use and ensuring a stable connection between it and the PCB circuit board 20. The connecting part 50 is located above the PCB circuit board 20, and the fixing part 60 is located below the PCB circuit board 20. The bottom surface of the fixing part 60 has a flat structure, which facilitates the stable placement of the connector on the display table and improves the overall structural stability. In addition, the connector adopts a left-right split design, including a left part and a right part. The connecting part 50 of the left part can be called the upper left part 51, the fixing part 60 of the left part can be called the lower left part, the connecting part 50 of the right part can be called the upper right part 52, and the fixing part 60 of the right part can be called the lower right part. This design not only achieves left-right symmetry and structural uniformity of the connector, but also facilitates assembly and maintenance. Preferably, the lower left and lower right parts adopt an integral molding design to form a cross structure. This cross structure is composed of two triangles, which has higher stability and load-bearing capacity, effectively enhancing the rigidity and deformation resistance of the overall structure.

[0040] In some embodiments of this application, both the groove and the protrusion are provided with screw holes 70, and the groove and the protrusion are connected by screws through the screw holes 70.

[0041] Specifically, the grooved and protruding screw connection can further improve the stability and reliability of the connector, meeting the requirements of high-strength structures.

[0042] In some embodiments of this application, a wedge-shaped structure 61 is provided at both the front and rear ends of the protrusion, and the wedge-shaped structure 61 is provided along the front-rear direction.

[0043] For details, please refer to Figure 6 As shown, the gradually tapered slope design of the wedge structure 61 helps the protrusion to slide smoothly back and forth in the through groove, reducing frictional resistance and improving the smoothness of sliding or assembly processes.

[0044] It should be noted that although the front motor and the rear motor have different functions, their structural designs can remain consistent; similarly, although the front motor transmission components and the rear motor transmission components have different functions, their structural designs can also remain consistent to facilitate manufacturing and maintenance.

[0045] In some embodiments of this application, the model car dynamic display device further includes an elastic contact 80, and both the front motor and the rear motor are electrically connected to the PCB circuit board 20 through the elastic contact 80.

[0046] Specifically, the resilient contact 80 is made of a metal material with a certain degree of elasticity, which can provide stable and reliable electrical contact between different components. During the operation of the model car, it will generate slight vibrations. Due to its elastic properties, the resilient contact 80 can adapt to these slight vibrations and mechanical deviations, effectively buffering the impact of vibration, preventing poor electrical contact or disconnection, and ensuring the continuity and stability of the electrical connection.

[0047] In some embodiments of this application, a battery mounting position 90 is provided on the PCB circuit board 20, and the model car dynamic display device further includes a battery, which is disposed in the battery mounting position 90 and electrically connected to the control circuit.

[0048] Specifically, the battery is electrically connected to the control circuit via the battery mounting position 90 to ensure a stable power supply for the entire model car dynamic display device.

[0049] The dynamic display device for model cars provided by this utility model can also be called a dynamic posture verification device for small-scale car models. This device is specifically designed for 1:64 scale car models, featuring a highly compatible electric roller structure and supporting wheelbase adjustment to meet the needs of model car enthusiasts for a refined spatial layout. Compared to traditional devices that use a double-row comb tooth structure to obstruct the gap between the two axes and restrict displacement, this device has a compact overall structure, occupies less space, and has a higher space utilization rate. Furthermore, this dynamic display device integrates a PCB circuit board 20 that provides dual power supply modes: dry battery and USB charging. The motor is connected to the roller section via a motor transmission component and a transmission belt. At least one roller section is located in a through slot of the PCB circuit board 20 and can slide along the slot, realizing dynamic display and forward / backward sliding adjustment. The dynamic display device for model cars adopts an open design, eliminating the need for an additional outer shell, which simplifies the structure while ensuring overall stability and ease of operation. Preferably, the overall dimensions of the dynamic display device for the model car are 107 mm in length and 85 mm in width, with an adjustable wheelbase range of 30 mm, a minimum wheelbase of 30 mm, and a maximum wheelbase of 60 mm, which can meet the diverse display needs of car models with different wheelbases. Typically, after placing this dynamic display device in the display area, the distance between the model car and the display table is less than 15 mm.

[0050] It should be noted that the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0051] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A dynamic display device for a model car, characterized in that, The device includes a front roller for supporting the front wheels of a model car, a rear roller for supporting the rear wheels of the model car, a front motor, a front motor drive, a rear motor, a rear motor drive, and a PCB circuit board. The front roller is located at the front end of the PCB circuit board and is connected to the front motor via the front motor drive. The rear roller is located at the rear end of the PCB circuit board and is connected to the rear motor via the rear motor drive. The PCB circuit board has a control circuit and a through slot. The front roller and / or the rear roller passes through the through slot and can slide back and forth along the slot. The control circuit is electrically connected to both the front motor and the rear motor. When the control circuit activates the front motor and the rear motor, the front motor drives the front roller to rotate via the front motor drive, thereby driving the front wheels of the model car to rotate. Simultaneously, the rear motor drives the rear roller to rotate via the rear motor drive, thereby driving the rear wheels of the model car to rotate.

2. The dynamic display device for a model car according to claim 1, characterized in that, The front roller is fixedly connected to the PCB circuit board, and the rear roller passes through the through groove and can slide back and forth along the through groove.

3. The dynamic display device for a model car according to claim 2, characterized in that, The rear roller section includes a connector, a first connecting shaft, a second connecting shaft, a first cylindrical roller, a second cylindrical roller, a first transmission belt, and a second transmission belt. The connector passes through the through groove and can slide back and forth along the groove. Both the first and second connecting shafts are rotatably connected to the connector and are horizontally parallel. The first cylindrical roller is sleeved on the outside of the first connecting shaft and is a cylindrical structure with a uniform diameter. The second cylindrical roller is sleeved on the outside of the second connecting shaft and is a cylindrical structure with diameters at both ends larger than its middle diameter. The rear motor is connected to the connector. The first transmission belt is wound around the outside of the rear motor drive component and the first cylindrical roller, and the second transmission belt is wound around the outside of the rear motor drive component and the second cylindrical roller.

4. The dynamic display device for a model car according to claim 3, characterized in that, The through groove includes a left groove and a right groove with identical structure and arranged parallel to each other. The connecting member includes a left member and a right member with identical structure and arranged symmetrically. The left member passes through the left groove and can slide back and forth along the left groove. The right member passes through the right groove and can slide back and forth along the right groove. The left end of the first connecting shaft is rotatably connected to the left member. The right end of the first connecting shaft is rotatably connected to the right member. The left end of the second connecting shaft is rotatably connected to the left member. The right end of the second connecting shaft is rotatably connected to the right member.

5. The dynamic display device for a model car according to claim 4, characterized in that, The rear motor includes a left motor and a right motor with identical structures and symmetrical arrangement. The rear motor transmission components include a left transmission component and a right transmission component with identical structures and symmetrical arrangement. The left motor is connected to the left component, and the right motor is connected to the right component. The first transmission belt is wound around the outside of the left transmission component and the first cylindrical roller, and the second transmission belt is wound around the outside of the right transmission component and the second cylindrical roller. The left transmission component and the right transmission component are independently arranged and partially in contact.

6. The dynamic display device for a model car according to claim 3, characterized in that, The connector includes a connecting part and a fixing part. The connecting part is located above the PCB circuit board, and a groove is provided at the bottom of the connecting part. A protrusion is provided at the top of the fixing part. The protrusion passes through the through groove and is engaged with the groove.

7. The dynamic display device for a model car according to claim 6, characterized in that, Both the groove and the protrusion are provided with screw holes, and the groove and the protrusion are connected by screws through the screw holes.

8. A dynamic display device for a model car according to claim 6, characterized in that, Both the front and rear ends of the protrusion are provided with wedge-shaped structures, which are arranged along the front-back direction.

9. The dynamic display device for a model car according to claim 1, characterized in that, The model car dynamic display device also includes elastic contacts, through which both the front motor and the rear motor are electrically connected to the PCB circuit board.

10. A dynamic display device for a model car according to claim 1, characterized in that, The PCB circuit board is provided with a battery mounting position, and the model car dynamic display device also includes a battery, which is disposed in the battery mounting position and electrically connected to the control circuit.

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