A toy building block based on a modified mortise and tenon structure
By using a butterfly tenon structure with a magnet and iron core and a movable rod connection, the stability and functional expandability issues of mortise and tenon toy building blocks are solved, achieving a more stable, flexible and fun way of connecting building blocks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 重庆对外经贸学院
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-29
AI Technical Summary
Existing mortise and tenon toy building blocks have poor stability and insufficient functional expandability. Traditional dovetail joints are prone to sliding and separation and lack dynamic joint design.
The butterfly tenon structure, designed with magnets and iron cores, achieves precise alignment and magnetic connection through fixed and telescopic butterfly tenons, and allows for movable connection of building blocks through movable rods. ABS plastic material ensures safety and stability.
It improves the stability and flexibility of the building blocks' connection, reduces the difficulty of connection, increases the entertainment value and functional expandability, and reduces the possibility of losing the butterfly tenon.
Smart Images

Figure CN224292519U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of toy technology, and in particular to a toy building block based on an improved mortise and tenon structure. Background Technology
[0002] Building blocks are typically cubic wooden or plastic solid toys, usually decorated with letters or pictures on each surface. Building blocks play a significant role in children's intellectual development and can also improve their hand-eye coordination. There are many ways to play with building blocks, such as arranging, connecting, forming rings, and creating symmetrical patterns, all of which are helpful for children's intelligence. Allowing children to participate in problems related to proportion and symmetry is very meaningful for early arithmetic development.
[0003] The existing mortise and tenon toy building blocks have the following problems:
[0004] 1. Poor structural stability: Traditional dovetail joints are prone to separation due to sliding after connection, resulting in poor stability after the building blocks are assembled.
[0005] 2. Poor functional expandability: For example, the existing patent CN 219815275 U only realizes the static connection between building blocks and lacks dynamic joint design.
[0006] Therefore, in order to solve the aforementioned problems, we propose a toy building block based on an improved mortise and tenon structure. Utility Model Content
[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a toy building block based on an improved mortise and tenon structure.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A toy building block based on an improved mortise and tenon structure includes a large building block, a small building block, and a fixed butterfly tenon. Both the large building block and the small building block are rectangular structures. The six sides of the large building block and the four sides of the small building block are provided with dovetail grooves. The large building block and the small building block can be connected by the fixed butterfly tenon.
[0010] A six-headed iron core is fixedly installed inside the large building block, and the six ends of the six-headed iron core extend into the six dovetail grooves located on the outer surface of the large building block.
[0011] A cross-shaped iron core is fixedly installed inside the small building block, and the four ends of the cross-shaped iron core extend into the four dovetail grooves located on the outer surface of the small building block.
[0012] Magnets are fixedly embedded at both the top and bottom of the fixed butterfly tenon.
[0013] Furthermore, it also includes a telescopic butterfly tenon, which includes a fixed tenon block, a movable tenon block, and a movable rod. The magnet is fixedly embedded at the top and bottom of both the fixed tenon block and the movable tenon block. The movable rod is slidably installed inside the fixed tenon block, and one end of the movable rod extends to one end of the fixed tenon block and is fixedly connected to one end of the movable tenon block.
[0014] Furthermore, the fixed tenon has a sliding cavity inside, the movable rod includes a connecting rod and a sliding rod, one end of the connecting rod is rotatably connected to one end of the sliding rod, the other end of the connecting rod is fixedly connected to the movable tenon, and the other end of the sliding rod extends into the interior of the sliding cavity and is slidably connected to the sliding cavity.
[0015] Furthermore, the magnetic poles of the magnets at the top and bottom of the fixed butterfly tenon are opposite to those of the fixed butterfly tenon.
[0016] Furthermore, the large building blocks, small building blocks, fixed butterfly tenons, and telescopic butterfly tenons are all made of ABS plastic.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] 1. The design of the magnet and iron core of this utility model can reduce the possibility of the butterfly tenon being inserted into the dovetail groove, avoid the separation of building blocks due to sliding, and enable the butterfly tenon and dovetail groove to be accurately aligned, which facilitates the connection between building blocks and reduces the difficulty of connecting building blocks.
[0019] 2. The design of the top and bottom magnets of the butterfly tenon with opposite magnetic poles allows the butterfly tenons to attract each other, making it easy to gather and store the butterfly tenons and effectively reducing the possibility of losing them.
[0020] 3. The movable rod of this utility model can be fully inserted into the sliding cavity. When the connecting rod is pulled out of the sliding cavity, it can rotate. The fixed tenon and the movable tenon can be connected with different building blocks to realize the movable connection between two building blocks, further improving the flexibility and entertainment of the building blocks. Attached Figure Description
[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2This is a perspective view of the large building block of this utility model;
[0024] Figure 3 This is a perspective view of a portion of the structure of this utility model;
[0025] Figure 4 This is a perspective view of the fixed butterfly tenon of this utility model;
[0026] Figure 5 This is a cross-sectional view of the telescopic butterfly tenon of this utility model.
[0027] In the diagram: 1. Large building block; 2. Small building block; 3. Dovetail groove; 4. Fixed butterfly tenon; 5. Fixed tenon block; 6. Movable tenon block; 7. Movable rod; 8. Six-head iron core; 9. Cross iron core; 10. Magnet; 11. Connecting rod; 12. Sliding rod; 13. Sliding cavity. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;
[0029] Reference Figure 1-5 A toy building block based on the improved mortise and tenon structure includes a large building block 1, a small building block 2 and a fixed butterfly tenon 4. Both the large building block 1 and the small building block 2 are rectangular structures. The six sides of the large building block 1 and the four sides of the small building block 2 are provided with dovetail grooves 3. The large building block 1 and the small building block 2 can be connected by the fixed butterfly tenon 4.
[0030] The shapes of the large building block 1 and the small building block 2 include, but are not limited to, other irregular shapes such as polyhedra. The opening position of the dovetail groove 3 can be designed according to actual needs, so as to meet the requirement that the large building block 1 and the small building block 2 can be connected to each other through the dovetail groove 3 and the fixed butterfly tenon 4.
[0031] The game features multiple large building blocks 1, small building blocks 2, and fixed butterfly tenons 4, which can be assembled into different shapes according to the player's needs, offering high flexibility and entertainment value.
[0032] A six-headed iron core 8 is fixedly installed inside the large block 1, with each of the six ends of the six-headed iron core 8 extending into the six dovetail grooves 3 located on the outer surface of the large block 1. A cross-shaped iron core 9 is fixedly installed inside the small block 2, with each of the four ends of the cross-shaped iron core 9 extending into the four dovetail grooves 3 located on the outer surface of the small block 2. Magnets 10 are fixedly embedded in the top and bottom of the fixed butterfly tenon 4. A telescopic butterfly tenon is also included, comprising a fixed tenon block 5, a movable tenon block 6, and a movable rod 7. Magnets 10 are fixedly embedded in the top and bottom of both the fixed tenon block 5 and the movable tenon block 6.
[0033] Once the fixed dovetail tenon 4 or the telescopic dovetail tenon is fully inserted into the dovetail groove 3, the fixed dovetail tenon 4 or the telescopic dovetail tenon can be attracted to the cross iron core 9 and the six-head iron core 8 by the magnet 10. This can effectively prevent the dovetail tenon from sliding inside the dovetail groove 3, causing the building blocks to separate and affecting the splicing of the building blocks. At the same time, it can make the dovetail tenon and the dovetail groove 3 accurately aligned, which facilitates the connection between the building blocks and reduces the difficulty of connecting the building blocks.
[0034] The magnetic poles of the magnets 10 at the top and bottom of the fixed butterfly tenon 4 are opposite to those of the fixed butterfly tenon 4.
[0035] Opposite magnetic poles can achieve mutual attraction between fixed butterfly tenons 4 or telescopic butterfly tenons, making it easy to gather and store fixed butterfly tenons 4 or telescopic butterfly tenons, effectively reducing the possibility of loss of fixed butterfly tenons 4 or telescopic butterfly tenons.
[0036] A movable rod 7 is slidably installed inside the fixed tenon 5. One end of the movable rod 7 extends to one end of the fixed tenon 5 and is fixedly connected to one end of the movable tenon 6. A sliding cavity 13 is formed inside the fixed tenon 5. The movable rod 7 includes a connecting rod 11 and a sliding rod 12. One end of the connecting rod 11 is rotatably connected to one end of the sliding rod 12, and the other end of the connecting rod 11 is fixedly connected to the movable tenon 6. The other end of the sliding rod 12 extends into the sliding cavity 13 and is slidably connected to the sliding cavity 13.
[0037] The movable rod 7 can be fully inserted into the sliding cavity 13. When the connecting rod 11 is pulled out of the sliding cavity 13, it can rotate. The fixed tenon 5 and the movable tenon 6 can be connected with different building blocks to realize the movable connection between two building blocks, further improving the flexibility and entertainment of the building blocks.
[0038] Large building block 1, small building block 2, fixed butterfly tenon 4, and telescopic butterfly tenon are all made of ABS plastic. ABS plastic has good comprehensive performance, high impact strength, and is non-toxic, making it safe for children to use.
Claims
1. A toy building block based on an improved mortise and tenon structure, comprising large building blocks (1), small building blocks (2), and a fixed butterfly tenon (4), characterized in that, Both the large block (1) and the small block (2) are rectangular structures. The six sides of the large block (1) and the four sides of the small block (2) are provided with dovetail grooves (3). The large block (1) and the small block (2) can be connected by the fixed butterfly tenon (4). The large block (1) is fixedly installed with a six-headed iron core (8), and the six ends of the six-headed iron core (8) extend into the six dovetail grooves (3) located on the outer surface of the large block (1); A cross-shaped iron core (9) is fixedly installed inside the small building block (2), and the four ends of the cross-shaped iron core (9) extend into the four dovetail grooves (3) located on the outer surface of the small building block (2); Magnets (10) are fixedly embedded at the top and bottom of the fixed butterfly tenon (4).
2. The toy building blocks based on the improved mortise and tenon structure according to claim 1, characterized in that, It also includes a telescopic butterfly tenon, which includes a fixed tenon block (5), a movable tenon block (6), and a movable rod (7). The magnet (10) is fixedly embedded at the top and bottom of the fixed tenon block (5) and the movable tenon block (6). The movable rod (7) is slidably installed inside the fixed tenon block (5). One end of the movable rod (7) extends to one end of the fixed tenon block (5) and is fixedly connected to one end of the movable tenon block (6).
3. A toy building block based on an improved mortise and tenon structure according to claim 2, characterized in that, The fixed tenon (5) has a sliding cavity (13) inside. The movable rod (7) includes a connecting rod (11) and a sliding rod (12). One end of the connecting rod (11) is rotatably connected to one end of the sliding rod (12). The other end of the connecting rod (11) is fixedly connected to the movable tenon (6). The other end of the sliding rod (12) extends into the interior of the sliding cavity (13) and is slidably connected to the sliding cavity (13).
4. A toy building block based on an improved mortise and tenon structure according to claim 1, characterized in that, The top and bottom of the fixed butterfly tenon (4) have opposite magnetic poles away from the fixed butterfly tenon (4).
5. A toy building block based on an improved mortise and tenon structure according to claim 3, characterized in that, The large building block (1), small building block (2), fixed butterfly tenon (4), and telescopic butterfly tenon are all made of ABS plastic.