A three-view teaching aid

Abstract

This utility model discloses a three-view teaching aid. It includes: a main unit equipped with a first LED array for displaying the color combinations of a top view or layered cross-sectional view of the seven Luban Cube blocks to be assembled into a cube; and sub-cards, including a first sub-card and a second sub-card; the sub-cards are detachably connected to the main unit and electrically connected to it via a connector; the first sub-card is equipped with a second LED array for displaying the color combinations of a front view of the seven Luban Cube blocks to be assembled into a cube; the second sub-card is equipped with a third LED array for displaying the color combinations of a side view of the seven Luban Cube blocks to be assembled into a cube; the main unit interacts with the first and second sub-cards via its control unit to synchronously control the color display of the second and third LED arrays. This teaching aid breaks through the limitations of traditional physical projection or static cards, realizing dynamic display of three views. By expressing the projection information of each view through color combinations, the two-dimensional representation of the three-dimensional structure becomes more intuitive.

Description

Technical Field

[0001] This utility model relates to the field of electronic educational equipment technology, and more specifically, to a three-view teaching aid. Background Technology

[0002] Luban Cube, also known as Soma Cube, is a three-dimensional puzzle made up of seven small blocks of different shapes, which can be combined to form a 3×3×3 cube. This educational toy is widely used to cultivate spatial thinking skills in teenagers and has promotional value in both education and competition.

[0003] Three-view drawings (i.e., front view, side view, and top view) are an important part of spatial geometry teaching, representing a key skill in transitioning from three-dimensional structures to two-dimensional graphic representations. However, in traditional teaching, the methods for teaching three-view drawings often remain limited to blackboard diagrams, static models, or paper cards.

[0004] For example, in 2009, patent CN201397597Y disclosed a teaching aid with a three-panel slot structure, which demonstrates the main, left and top views through cards. However, this solution can only statically demonstrate the views with cards, lacking dynamic interaction and intelligent feedback, and cannot generate view questions in real time.

[0005] While the subsequent 2018 patent CN208433145U introduced a light source to improve the visualization of the principle, the light source needed to be placed in different positions, such as directly in front of the main view panel, directly in front of the right side of the left view panel, and directly above the top view panel. In actual manual adjustment, angular deviations could easily cause projection distortion or ghosting, requiring a high level of skill in operation. Furthermore, the lack of a light shield meant that the projection blurriness varied depending on whether the ambient light was too strong or too weak, reducing the reliability of the teaching. In addition, it could only display fixed views through physical projection and did not achieve electronic color combination display or question generation.

[0006] The newer 2020 patent CN213458611U uses a cube grid as its core and solves the problem of viewing angle calibration, but it lacks a light source system and cannot be used in low-light environments. Moreover, it lacks an intelligent display module and cannot dynamically present the view information of each face.

[0007] At the same time, existing teaching aids generally lack support for cross-sectional diagrams, making it impossible to conduct structural layer analysis and learning.

[0008] Therefore, there is an urgent need for an educational toy that integrates dynamic display of three views, layered display, and interactive verification. Utility Model Content

[0009] This invention provides a three-view teaching aid to address the problems in existing three-view teaching methods, such as the inability to dynamically present view information of each face, the lack of display of cross-sectional views, and the lack of interactive verification.

[0010] To achieve the above objectives, this utility model provides a three-view teaching aid, comprising: a main unit, wherein the main unit is equipped with a first LED light array for displaying the color combination of a top view or layered cross-sectional view of the seven Luban Cube building blocks to be assembled into a cube; and sub-cards, including a first sub-card and a second sub-card; the first sub-card and the second sub-card are detachably connected to the main unit and electrically connected to the main unit via connectors; the first sub-card is equipped with a second LED light array for displaying the color combination of a front view of the seven Luban Cube building blocks to be assembled into a cube; the second sub-card is equipped with a third LED light array for displaying the color combination of a side view of the seven Luban Cube building blocks to be assembled into a cube; the main unit interacts with the first and second sub-cards through its control unit to synchronously control the color display of the second and third LED light arrays.

[0011] Optionally, the host further includes: a storage unit; the storage unit pre-stores multiple questions for assembling the seven blocks of Luban Cube; the control unit is electrically connected to the storage unit, and is used to randomly retrieve a question for assembling the seven blocks of Luban Cube from the storage unit, analyze it, and drive the second LED array and the third LED array to display the color combination of the corresponding view according to the analysis result, so that the user can assemble the seven blocks of Luban Cube according to the color combination of the displayed view.

[0012] Optionally, the host further includes: a button unit, the button unit including an OK button; the OK button is electrically connected to the control unit; when the user briefly presses the OK button after assembling the seven Luban Cube blocks, the button unit outputs a confirmation signal to the control unit; after receiving the confirmation signal from the OK button, the control unit controls the first LED array to display the color combination of the preset correct answer's top view, so that the user can compare and verify the assembly result; when the OK button is continuously pressed for a preset time threshold, the button unit outputs a mode switching control signal to the control unit; after receiving the mode switching control signal, the control unit controls the first LED array to enter the layered cross-sectional view display mode; in the layered cross-sectional view display mode, the control unit controls the first LED array to sequentially display the cross-sectional color combinations of the cube blocks at different heights along the vertical direction according to a preset time sequence.

[0013] Optionally, the host further includes: a display unit; the display unit includes an LCD segment screen for displaying question numbers and answering time; the control unit is electrically connected to the display unit, and when the control unit controls the first LED array to display the color combination of the preset correct answer top view, the control unit simultaneously controls the display unit to display the question numbers and the user's answering time.

[0014] Optionally, the host further includes: a sound unit; the sound unit includes a speaker for outputting answers; the control unit is electrically connected to the sound unit, and when the control unit controls the first LED array to display the color combination of the preset correct answer's top view, the control unit simultaneously controls the sound unit to output a prompt sound for the user to answer.

[0015] Optionally, the first sub-card and the second sub-card are detachably connected to the host via a card slot insertion structure; a first card slot is provided on the bottom surface of the first sub-card for inserting the first upright plate of the host; a second card slot is provided on the bottom surface of the second sub-card for inserting the second upright plate of the host.

[0016] Optionally, the connector includes a first terminal group disposed in the first slot and the second slot, and a second terminal group disposed on the host and cooperating with the first terminal group; the first terminal group is a female terminal and the second terminal group is a male terminal. When the daughter card is inserted into the host through the slot, the female terminal and the male terminal are in contact and connected, thereby realizing the electrical connection between the host and the daughter card.

[0017] Optionally, the first LED array is disposed on the top surface of the host in a 3-row, 7-column array structure, wherein the first 3 columns are used to display the color combination of the top view, and the first 3 columns and the last 3 columns are used to display the color combination of the layered cross-sectional view. The control unit drives the corresponding LED area to light up the corresponding color according to different display modes.

[0018] Optionally, the first sub-card includes a first sub-card lower cover, a first sub-card light panel, a first sub-card light shield, a first sub-card light cover, and a first sub-card upper cover connected in sequence; the second sub-card includes a second sub-card lower cover, a second sub-card light panel, a second sub-card light shield, a second sub-card light cover, and a second sub-card upper cover connected in sequence.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a three-view teaching aid, comprising a main unit and sub-cards. The main unit, along with the first and second sub-cards, displays a top view, a front view, and a side view, respectively. This teaching aid breaks away from traditional physical projection or static cards, achieving dynamic display of three views. The main unit supports layered display of cross-sectional views of Luban cube blocks along the vertical direction, facilitating analysis of the layout of each layer and enhancing the vertical understanding of the three-dimensional structure. Color combinations are used to express the projection information of each view, making the two-dimensional representation of the three-dimensional structure more intuitive and lowering the user's understanding threshold. The main unit control unit can randomly generate questions for assembling Luban cube blocks, increasing the fun of training. After assembling the Luban cube blocks, the user can view the correct answer and receive voice prompts on the completion status through the main unit, enhancing interactivity and enjoyment. Attached Figure Description

[0021] Figure 1 This is a three-view diagram of a teaching aid provided in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the insertion structure between the first daughter card and the second daughter card and the host provided in this embodiment of the utility model;

[0023] Figure 3 This is an exploded view of the first and second sub-cards provided in this embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram showing the shape and color of the seven Luban Cube building blocks provided in this embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the seven Luban Cube building blocks assembled into a 3×3×3 cube according to an embodiment of the present invention;

[0026] Figure 6 This utility model embodiment provides an observer to view the color combination of a cube block from the front view, side view, and top view;

[0027] Figure 7 These are the color combinations of the various LED light arrays provided in the embodiments of this utility model;

[0028] Figure 8 The first LED array provided in this embodiment displays the color combination of a cubic building block in a layered cross-sectional view along the vertical direction.

[0029] Symbol explanation:

[0030] Main unit-1, first sub-card-2, second sub-card-3, first LED light array-4, second LED light array-5, third LED light array-6, first card slot-7, second card slot-8, first upright plate-9, second upright plate-10, first sub-card lower cover-11, first sub-card light board-12, first sub-card light shield-13, first sub-card light cover-14, first sub-card upper cover-15, second sub-card lower cover-16, second sub-card light board-17, second sub-card light shield-18, second sub-card light cover-19, second sub-card upper cover-20. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Existing technologies fail to simultaneously address technical challenges such as "view visualization, light source stability, generating training questions, and enabling the analysis and logical verification of surfaces and sections." This results in comprehension difficulties for students in both home and educational settings when converting 3D to 2D, leading to low learning efficiency for three-view concepts. Therefore, an integrated and innovative solution is urgently needed.

[0033] To address the aforementioned issues, this invention provides a system that utilizes the Luban Cube as a tool and employs an intelligent host 1 and a detachable LED array to transform the three-dimensional structure of the Luban Cube into a two-dimensional color combination display. This system constructs a closed-loop training system of "view-question presentation - block assembly - answer verification," thus solving the problems of insufficient intelligence and poor interactivity in existing teaching aids.

[0034] Figure 1 This is a three-view diagram of a teaching aid provided in an embodiment of this utility model; as shown... Figure 1 As shown, the three-view teaching aid includes:

[0035] 1. Host 1, wherein the host 1 is provided with a first LED light array 4, which is used to display the color combination of the top view or layered cross-sectional view of the seven building blocks of Luban Cube to be assembled into a cube;

[0036] In an optional embodiment, the first LED array 4 is disposed on the top surface of the host 1 in a 3-row, 7-column array structure, wherein the first 3 columns are used to display the color combination of the top view, and the first 3 columns and the last 3 columns are used to display the color combination of the layered cross-sectional view. The host 1 has a built-in control unit, which drives the corresponding LED area of ​​the first LED array 4 to light up the corresponding color according to different display modes.

[0037] Specifically, in the top view display mode, the first three columns (columns 1 to 3) are used to display the top view color combination after the seven Luban Cube blocks are assembled into a 3×3×3 cube, that is, to display the color distribution of the nine color blocks on the top layer (Z=2) in the vertical direction (Z axis).

[0038] In the layered cross-sectional view display mode, the first 3 columns (columns 1 to 3) are used to display the color combination of the bottom layer (Z=0) cross-sectional view in the Z-axis direction after the seven Luban Cube blocks are assembled into a 3×3×3 cube; the last 3 columns (columns 5 to 7) are used to display the color combination of the middle layer (Z=1) cross-sectional view in the Z-axis direction after the seven Luban Cube blocks are assembled into a 3×3×3 cube; after displaying the bottom and middle layer cross-sectional view color combinations, the first 3 columns (columns 1 to 3) are used to switch to display the color combination of the top layer (Z=2) cross-sectional view in the Z-axis direction after the seven Luban Cube blocks are assembled into a 3×3×3 cube.

[0039] This implementation process helps users complete the mapping and understanding from three-dimensional shapes to two-dimensional views in the process of spatial structure cognition.

[0040] Each LED in the first LED array 4 can be individually driven by the control unit of the host 1 to display the corresponding color.

[0041] 2. Sub-cards, including: a first sub-card 2 and a second sub-card 3; the first sub-card 2 and the second sub-card 3 are detachably connected to the host 1 and electrically connected to the host 1 via a connector; the first sub-card 2 is provided with a second LED light array 5 for displaying the color combination of the front view of the seven Luban cube blocks to be assembled into a cube; the second sub-card 3 is provided with a third LED light array 6 for displaying the color combination of the side view of the seven Luban cube blocks to be assembled into a cube;

[0042] In one optional embodiment, the first sub-card 2 and the second sub-card 3 are both installed on both sides of the host 1 via a detachable connection; preferably, the first sub-card 2 and the second sub-card 3 are detachably connected to the host 1 via a card slot insertion structure. Figure 2 This is a schematic diagram of the insertion structure between the first daughter card 2 and the second daughter card 3 and the host 1 provided in this embodiment of the utility model; as shown Figure 2 As shown, a first card slot 7 is provided on the bottom surface of the first sub-card 2 for inserting the first upright plate 9 of the host 1; a second card slot 8 is provided on the bottom surface of the second sub-card 3 for inserting the second upright plate 10 of the host 1.

[0043] In an optional embodiment, the first sub-card 2 and the second sub-card 3 are electrically connected to the host 1 via a connector; preferably, the connector includes a first terminal group disposed in the first card slot 7 and the second card slot 8, and a second terminal group disposed on the host 1 that mates with the first terminal group; the first terminal group is a female terminal and the second terminal group is a male terminal. When the sub-card is inserted into the host 1 through the card slot, the female terminal and the male terminal make contact and connect, thereby realizing the electrical connection between the host 1 and the sub-card.

[0044] The first sub-card 2 is equipped with a second LED array 5, which is arranged in a 3x3 matrix, corresponding to the color combination of the seven Luban Cube blocks to be assembled into a cube (front view) as seen by the user from the front. The second sub-card 3 is equipped with a third LED array 6, also in a 3x3 structure, corresponding to the color combination of the seven Luban Cube blocks to be assembled into a cube (side view) as seen by the user from the left.

[0045] Both LED arrays are driven by the control unit of host 1 through color value data packets, illuminating the LEDs at the corresponding positions and displaying predetermined colors, which are used to provide users with two-dimensional color prompts for the front and side views before assembly.

[0046] In one optional implementation, Figure 3 This is an exploded view of the first sub-card 2 and the second sub-card 3 provided in this embodiment of the utility model; as shown Figure 3 As shown, the first sub-card 2 includes a first sub-card lower cover 11, a first sub-card light panel 12, a first sub-card light shield 13, a first sub-card light cover 14, and a first sub-card upper cover 15 connected in sequence; the second sub-card 3 includes a second sub-card lower cover 16, a second sub-card light panel 17, a second sub-card light shield 18, a second sub-card light cover 19, and a second sub-card upper cover 20 connected in sequence.

[0047] The first sub-card lower cover 11 and the first sub-card upper cover 15 cooperate to form a closed shell to protect the light panel. It may include brand logos, decorative structures, or usage instructions. The first sub-card light panel 12 has a 3×3 array of LEDs for displaying color combinations in the front view and interacting with the control unit of the host 1 for color value data. The first sub-card light shield 13 covers the first sub-card light panel 12 and has nine light holes or slots corresponding to the positions of the nine LED beads. This is used to avoid light interference and dispersion, enhance the clarity of color block boundaries, and make different colors more easily distinguishable. The first sub-card lampshade 14 is disposed outside the first sub-card light shield 13. It is an integrally molded or transparent structure used to protect the LEDs and can also act as a diffuser to make the light more uniform and softer. The surface of the first sub-card lampshade 14 may have a diffuse reflection treatment to improve visibility. The second sub-card 3 corresponds in structure to the first sub-card 2 and has the same function.

[0048] The host 1 interacts with the first sub-card 2 and the second sub-card 3 through its control unit to synchronously control the color display of the second LED array 5 and the third LED array 6.

[0049] Specifically, the control unit of the host 1 is electrically connected (i.e., connected via I / O interface) to the first LED array 4, the second LED array 5 on the first sub-card 2, and the third LED array 6 on the second sub-card 3, respectively, and realizes unified scheduling and driving of the second LED array 5 and the third LED array 6 through control logic. In a specific embodiment, when the present application presents a question, the control unit can control the first LED array 4 to not display color, and control the second LED array 5 on the first sub-card 2 and the third LED array 6 on the second sub-card 3 to synchronously display the color combination of the corresponding view. When the user finishes answering, the control unit controls the first LED array 4 to display the color combination of the top view.

[0050] In an optional implementation, the host 1 further includes: a storage unit; the storage unit pre-stores multiple problems for assembling the seven blocks of the Luban Cube;

[0051] The control unit is electrically connected to the storage unit and is used to randomly retrieve a problem from the storage unit to assemble the seven blocks of Luban Cube, analyze it, and drive the second LED array 5 and the third LED array 6 to display the color combination of the corresponding view according to the analysis result, so that the user can assemble the seven blocks of Luban Cube according to the color combination of the displayed view.

[0052] Figure 4 This is a schematic diagram showing the shape and color of the seven Luban Cube building blocks provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the seven Luban Cube building blocks assembled into a 3×3×3 cube according to an embodiment of this utility model; as shown. Figure 4 and Figure 5 As shown, the Luban Cube building blocks consist of 7 classic standard building blocks (block 1, block 2, block 3, block 4, block 5, block 6, and block 7). Each of the 7 blocks has a different shape (for example, block 1 is V-shaped, block 2 is L-shaped, block 3 is T-shaped, and block 4 is Z-shaped). Each block has a different color. The 7 blocks can be assembled into a 3×3×3 cube.

[0053] The storage unit pre-stores multiple problems (i.e., multiple combinations of 7 building blocks to form a cube); each problem includes: the type information of the seven building blocks of Luban Cube (such as L-shaped, T-shaped, Z-shaped, etc.), the spatial three-dimensional coordinate information (X, Y, Z) of each building block, the color corresponding to each building block, the problem number identifier, and the color combination information corresponding to the three views (top view, front view, side view) of the seven building blocks of Luban Cube to be assembled into a cube.

[0054] The control unit is electrically connected to the storage unit and is used to randomly retrieve a problem (i.e., a solution for randomly combining seven Luban cube blocks into a cube) from the storage unit for analysis, and drive the second LED array 5 to display the color combination of the main view based on the analysis result, and simultaneously drive the third LED array 6 to display the color combination of the side view.

[0055] Figure 6 This utility model embodiment provides an observer to view the color combination of a cube block from the front view, side view, and top view; Figure 7 These are the color combinations of the various LED light arrays provided in the embodiments of this utility model; such as... Figure 6 and Figure 7 As shown, the control unit obtains the color combination of the top view, front view, and side view based on the above analysis results, and then sends color value instructions to the first sub-card 2 and the second sub-card 3 synchronously through the communication interface; the second LED array of the first sub-card 2 lights up the corresponding color block according to the front view data; the third LED array of the second sub-card 3 lights up the corresponding color block according to the side view data.

[0056] This implementation allows the host unit 1 to dynamically generate different building task scenarios based on multiple questions in the storage unit, enhancing the diversity and fun of training. Users can use the corresponding colored Luban cube blocks to build in space based on the color combination prompts of the displayed front and side views, completing the cognitive transformation process from two-dimensional observation to three-dimensional construction.

[0057] In an optional embodiment, the host 1 further includes: a button unit, the button unit including an OK button; the OK button is electrically connected to the control unit;

[0058] When the user briefly presses the "OK" button after assembling the seven blocks of the Luban Cube, the button unit outputs a confirmation signal to the control unit. After receiving the confirmation signal from the "OK" button, the control unit controls the first LED array 4 to display the color combination of the preset correct answer top view, so that the user can compare and verify the assembly result.

[0059] Specifically, based on the color combinations indicated by each LED array, the user uses the seven Luban Cube building blocks to assemble the corresponding cube structure. Then, by briefly pressing the confirm button on host 1, the button unit generates a confirmation signal and transmits it to the control unit. The control unit responds to this confirmation signal, retrieves the standard answer data for the corresponding question from the question bank, and maps the color combination of the top view (Z=2 layers) onto the first LED array 4. The user can then compare the color combination of the top view displayed by the first LED array 4 with the color layout of the top surface of their assembled building blocks to determine if it is correct. This comparison process provides intuitive visual verification, effectively improving the efficiency of immediate feedback during user training.

[0060] When the confirmation key is pressed continuously for a preset time threshold, the key unit outputs a mode switching control signal to the control unit; after receiving the mode switching control signal, the control unit controls the first LED array 4 to enter the layered cross-sectional view display mode.

[0061] In the layered cross-sectional view display mode, the control unit controls the first LED array 4 to sequentially display the cross-sectional color combinations of different height layers of the cube building blocks along the vertical direction according to a preset time sequence.

[0062] Specifically, Figure 8 This is the color combination used in the first LED array 4 provided in this embodiment of the invention to display a layered cross-sectional view of a cube of building blocks along the vertical direction. For example... Figure 8 As shown, when the user presses the OK button continuously for a preset time threshold (e.g., 3 seconds), the layered cross-sectional view display mode can be triggered. In this mode, the first LED array 4 will no longer display the top view, but will instead display the cross-sectional color combination of the three height layers of the cube block along the vertical direction (i.e., the Z-axis) in sequence. Each layer is displayed using a 3×3 array, corresponding to the three planes Z=0 (bottom layer), Z=1 (middle layer), and Z=2 (top layer). The control unit cycles through the display content of different layers according to the preset time sequence to form a dynamic scrolling demonstration effect.

[0063] This layered display mechanism helps users understand the vertical distribution of a 3D structure, effectively solving the problem of not being able to identify height information in traditional three-view diagrams. Users can use this to: analyze the planar occupancy of each block at different heights; determine if there are any suspended, misaligned, or obstructed sections in their assembled structure; and adjust the block placement order to achieve correct reconstruction.

[0064] In an optional embodiment, the host 1 further includes: a display unit; the display unit includes an LCD segment screen for displaying question numbers and answering times;

[0065] The control unit is electrically connected to the display unit. When the control unit controls the first LED array 4 to display the color combination of the preset correct answer top view, the control unit simultaneously controls the display unit to display the question number (such as "question number 0001") for the user to answer.

[0066] This display unit provides visual feedback on response efficiency, making it easier for users to assess their spatial reasoning and operational proficiency.

[0067] In an optional embodiment, the host 1 further includes: a sound unit; the sound unit includes a speaker for outputting responses;

[0068] The control unit is electrically connected to the sound unit. When the control unit controls the first LED array 4 to display the color combination of the preset correct answer top view, the control unit simultaneously controls the sound unit to output the prompt sound when the user answers.

[0069] In low-light environments or when users are not focused, auditory prompts can assist visual output and enhance the interactive experience.

[0070] In an optional embodiment, the host 1 further includes a power supply unit; the power supply unit is electrically connected to the control unit and is used to supply power to the host 1.

[0071] The present application is illustrated below through two specific embodiments:

[0072] Example 1: Basic Three-View Training

[0073] (1) System initialization:

[0074] Turn on the power of host 1, and at the same time initialize the first LED array 4 of the 3×7 on the top surface of host 1 to a completely off state;

[0075] (2) Question generation:

[0076] After initialization, the control unit of host 1 randomly retrieves a puzzle of assembling seven Luban cube blocks from the storage unit, and selects the cube combination scheme number #1 by default (e.g., the spatial coordinates of the 7 blocks are [(0,0,0,red),(1,2,1,blue)...]). At the same time, the LCD segment code screen on the top of host 1 displays the level: 0001.

[0077] (3) View synchronous display:

[0078] ① According to the question information of level 0001, the first LED array 4 on the top surface of host 1 does not display the top view color block combination;

[0079] ② Synchronously, the control unit sends color value data packets to the first daughter card 2 and the second daughter card 3 via the bus, and the second LED array 5 of the first daughter card 2 displays a front view (e.g., Figure 7 The first sub-card displays the color combination of the 3x3 area on the front of the physical building block: the first row [yellow, yellow, blue], the second row [red, purple, purple], and the third row [red, red, purple]). The second sub-card 3 displays the side view (e.g., Figure 7 The display shows the color combination of the 3x3 area on the side of the physical building block: first row [blue, blue, orange], second row [purple, blue, green], third row [purple, cyan, green]).

[0080] (4) Building with blocks:

[0081] Based on the color combinations indicated on the first sub-card 2 and the second sub-card 3, users select the seven Luban Cube blocks of the corresponding colors (such as green L-shaped blocks and blue V-shaped blocks) and complete the assembly of a 3×3×3 cube within the specified time.

[0082] (5) Answer verification:

[0083] The user presses the "OK" button on host 1 to end the answer and begin verification. The first LED array 4 of host 1 displays a top view of the correct answer (e.g., displaying the color combination of the top 3×3 area of ​​the physical building blocks): first row [orange, orange, orange], second row [yellow, orange, blue], third row [yellow, yellow, blue]). The sound unit of host 1 plays the sound effect "Challenge time: 28 seconds", and the LCD segment screen displays the user's answer time simultaneously. The user compares the self-assembled model with the displayed correct answer. If the position and color of the color block match perfectly, the assembly is correct.

[0084] Example 2: Layered Section Training

[0085] (1) Mode switching:

[0086] After the question is presented in Example 1, the user presses and holds the "OK" button for 3 seconds, and the LCD segment code screen of host 1 displays "Cross-section mode (Z-axis layering)".

[0087] (2) Dynamic cross-section display:

[0088] The first LED array on the top surface of host 1 (3x7) operates in four zones:

[0089] Bottom section: The first 1-3 columns of the first LED array 4 display color blocks on the Z=0 plane (e.g., host 1 displays [cyan, cyan, green], [red, cyan, cyan], [red, red, purple]).

[0090] Middle layer section: Columns 5-7 of the first LED array 4 display Z=1 planar color blocks (e.g., [green, green, green], [yellow, purple, blue], [red, purple, purple]).

[0091] Top section: Click the "OK" button on host 1 again, and the first 1-3 columns in the first LED array 4 will switch to displaying Z=2 plane color blocks (such as [orange, orange, orange], [yellow, orange, blue], [yellow, yellow, blue]).

[0092] (3) Assembly verification:

[0093] Users adjust the blocks according to the color combination prompts (e.g., the bottom layer needs red blocks for support), which helps users locate incorrect layer structures.

[0094] The beneficial effects of this utility model are:

[0095] (1) Three-dimensional display space decoupling: The traditional fixed projection board is split into a pluggable host 1 (top view) + first sub-card 2 (front view) + second sub-card 3 (side view).

[0096] (2) Dynamic question engine: The host 1 has a built-in control unit and storage unit. The control unit can randomly retrieve a question from the storage unit for analysis, drive the second LED array 5 and the third LED array 6 to generate the color combination of the corresponding view, realize the automatic generation of the view question and the dynamic display of the view, and overcome the inefficient mode of "static demonstration + manual verification" of the existing teaching aids.

[0097] (3) Cross-sectional dimension expansion: The host 1 has a layered cross-sectional display function (such as displaying the distribution of color blocks on the 0th, 1st and 2nd layers of the plane), which solves the defect that traditional three-view teaching aids cannot display layered cross-sections and helps users understand the spatial composition of three-dimensional structures.

[0098] (4) By accurately mapping the spatial structure of Luban Cube through color combination, an intuitive transformation relationship from three-dimensional to two-dimensional is established, which is clearer than light source projection and avoids view distortion or ghosting caused by light angle.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tri-view teaching aid, characterized in that, include: The host is equipped with a first LED array for displaying the color combination of a top view or layered cross-sectional view of the seven Luban cube blocks to be assembled into a cube. The sub-card includes: a first sub-card and a second sub-card; the first sub-card and the second sub-card are detachably connected to the host and electrically connected to the host via a connector; the first sub-card is provided with a second LED light array for displaying the color combination of the front view of the seven Luban cube blocks to be assembled into a cube; the second sub-card is provided with a third LED light array for displaying the color combination of the side view of the seven Luban cube blocks to be assembled into a cube; The host computer interacts with the first and second sub-cards through its control unit to synchronously control the color display of the second and third LED arrays.

2. The three-view teaching aid according to claim 1, characterized in that: The host also includes: a storage unit; the storage unit pre-stores multiple questions on how to assemble the seven blocks of the Luban Cube. The control unit is electrically connected to the storage unit and is used to randomly retrieve a problem from the storage unit to assemble the seven blocks of Luban Cube, analyze it, and drive the second LED array and the third LED array to display the color combination of the corresponding view according to the analysis result, so that the user can assemble the seven blocks of Luban Cube according to the color combination of the displayed view.

3. The three-view teaching aid according to claim 2, characterized in that: The host further includes: a button unit, the button unit including an OK button; the OK button is electrically connected to the control unit; When the user briefly presses the "OK" button after assembling the seven blocks of the Luban Cube, the button unit outputs a confirmation signal to the control unit. After receiving the confirmation signal from the "OK" button, the control unit controls the first LED array to display the color combination of the preset correct answer top view, so that the user can compare and verify the assembly result. When the confirmation key is pressed continuously for a preset time threshold, the key unit outputs a mode switching control signal to the control unit; after receiving the mode switching control signal, the control unit controls the first LED array to enter the layered cross-sectional view display mode. In the layered cross-sectional view display mode, the control unit controls the first LED array to sequentially display the cross-sectional color combinations of different height layers of the cube building blocks along the vertical direction according to a preset time sequence.

4. The three-view teaching aid according to claim 3, characterized in that: The host also includes: a display unit; the display unit includes an LCD segment screen for displaying question numbers and answering time; The control unit is electrically connected to the display unit. When the control unit controls the first LED array to display the color combination of the preset correct answer top view, the control unit simultaneously controls the display unit to display the question number and the user's answer time.

5. The three-view teaching aid according to claim 4, characterized in that: The host also includes: a sound unit; the sound unit includes a speaker for outputting responses; The control unit is electrically connected to the sound unit. When the control unit controls the first LED array to display the color combination of the preset correct answer top view, the control unit simultaneously controls the sound unit to output the prompt sound when the user answers.

6. The three-view teaching aid according to claim 1, characterized in that: The first sub-card and the second sub-card are detachably connected to the host via a card slot insertion structure; a first card slot is provided on the bottom surface of the first sub-card for inserting the first upright plate of the host; a second card slot is provided on the bottom surface of the second sub-card for inserting the second upright plate of the host.

7. The three-view teaching aid according to claim 6, characterized in that: The connector includes a first terminal group disposed in the first slot and the second slot, and a second terminal group disposed on the host and cooperating with the first terminal group; The first terminal group is a female terminal, and the second terminal group is a male terminal. When the daughter card is inserted into the host through the card slot, the female terminal and the male terminal are in contact and connected, thereby realizing the electrical connection between the host and the daughter card.

8. The three-view teaching aid according to claim 3, characterized in that: The first LED array is located on the top surface of the host and is arranged in a 3-row, 7-column array structure. The first 3 columns are used to display the color combination of the top view, and the first 3 columns and the last 3 columns are used to display the color combination of the layered cross-sectional view. The control unit drives the corresponding LED area to light up the corresponding color according to different display modes.

9. The three-view teaching aid according to claim 1, characterized in that: The first sub-card includes a first sub-card lower cover, a first sub-card light panel, a first sub-card light shield, a first sub-card light cover, and a first sub-card upper cover, which are connected in sequence. The second sub-card includes a second sub-card lower cover, a second sub-card light panel, a second sub-card light shield, a second sub-card light cover, and a second sub-card upper cover, which are connected in sequence.

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