Educational toy building block based on improved tenon-and-mortise structure

Abstract

The invention belongs to the technical field of toys, and particularly relates to an improved educational toy building block based on a tenon-and-mortise structure, comprising: a base for supporting, the base comprising a large operating table and a small operating table; the total number of the hole woods is the second groove, the multiple pieces of hole woods have four length specifications, the four length specifications are in a progressive relation, and the multiple pieces of hole woods are multiple pieces of first hole woods, multiple pieces of second hole woods, multiple pieces of third hole woods, multiple pieces of fourth hole woods, multiple pieces of fifth hole woods, multiple pieces of sixth hole woods and multiple pieces of seventh hole woods; the first hole wood and the two second hole wood are combined to form an isosceles right triangle, the third hole wood and the two fourth hole wood are combined to form an isosceles right triangle, and the fifth hole wood and the two sixth hole wood are combined to form an isosceles right triangle. According to the invention, the interestingness of simple combination and complex combination is realized, the operation characteristic of integrating low structural property and high structural property is realized, and the characteristics of teaching, playing and indoor and outdoor effective extension education activities are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of toys, and in particular relates to an educational toy building block based on an improved mortise and tenon structure. Background Art

[0002] Building block toys are usually cubic wooden or plastic solid toys, usually decorated with letters or pictures on each surface. Building block toys play a great role in the development of children's intelligence and can also improve children's hand-eye coordination. There are many ways to play with building block toys. They can be arranged, connected, and ring-shaped. Various symmetrical styles are helpful to children's intelligence. Let children participate in proportion, symmetry and other issues by themselves, which is very meaningful for the early training of children's arithmetic.

[0003] The comparative document (publication number CN116726513A) discloses an educational toy for training young children's mathematical ability, including a building block shell, a digital mark is opened on the top of the building block shell, a through hole is opened on the front end surface of the building block shell, a limit hole is opened on the end of the building block shell, and positioning holes are opened on the upper and lower ends of the building block shell. The top of the inner wall of the building block shell is fixedly connected with a positioning frame, and also includes: a connecting component, the connecting component includes a groove magnetic plate, and a rubber pad is arranged at the lower end of the groove magnetic plate.

[0004] However, existing building block toys have a single way of playing, fixed shapes, and lack of variety, and only meet some of the development needs of children. Simple toys are difficult to achieve creative play and have limited inspiration for the development of creative thinking. Complex toys such as the Kongming Lock, Nine Linked Rings and other series of products are too complicated and difficult for children to operate. Summary of the invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes an educational toy building block based on an improved mortise and tenon structure.

[0006] The present invention provides an educational toy building block based on an improved mortise and tenon structure, comprising:

[0007] A base for support, the base comprising a large operating table and a small operating table;

[0008] The total number of hole woods of the second groove is four length specifications of the plurality of hole woods, and the four length specifications are in a progressive relationship, and the plurality of hole woods are a plurality of No. 1 hole woods, No. 2 hole woods, No. 3 hole woods, No. 4 hole woods, No. 5 hole woods, No. 6 hole woods, and No. 7 hole woods;

[0009] The No. 1 hole wood and the two No. 2 hole woods are combined into an isosceles right triangle, the No. 3 hole wood and the two No. 4 hole woods are combined into an isosceles right triangle, the No. 5 hole wood and the two No. 6 hole woods are combined into an isosceles right triangle, and the four No. 7 hole woods are combined into a square, the No. 5 hole wood is the same length as the No. 4 hole wood, the No. 3 hole wood is the same length as the No. 2 hole wood, and the No. 7 hole wood is the same length as the No. 6 hole wood;

[0010] A connection mechanism for connection, the connection mechanism comprising a plurality of first threaded shafts and a plurality of second threaded shafts;

[0011] The wheels are mounted on the base and are used for moving the building blocks.

[0012] Preferably, each of the hole wood is provided with a plurality of penetrating first holes on one side and a plurality of penetrating second holes on the other side, and the positions of the second holes and the first holes are staggered with each other.

[0013] Preferably, the first threaded shaft is used to pass through the first hole, and both ends of the first threaded shaft are threadedly sleeved with a ferrule, and the material of the ferrule is rubber.

[0014] Preferably, both ends of the No. 1 hole wood and the No. 5 hole wood are set as second mortise, and the end face of the second mortise is 45 degrees. The multiple No. 2 hole wood, No. 4 hole wood, and No. 6 hole wood are divided into two groups, namely the first group and the second group. One end of the first group is set as the second tenon, and the other end is set as the third tenon, and the end face of the second tenon is 45 degrees. One end of the second group is set as the third tenon, and the end face of the third tenon is a right angle, and the other end is set as the second tenon. The second tenon is inserted into the second tenon for installation, and the third tenon is inserted into the third tenon for installation. The first hole also passes through the second tenon, the third tenon, and the second tenon.

[0015] Preferably, one end of the second threaded shaft is also sleeved with a ferrule, the other end of the second threaded shaft is threadedly sleeved with a nut, and the length of the second threaded shaft exceeds the thickness of the two hole woods.

[0016] Preferably, one end of each of the No. 7 hole woods is set as a first tenon, and the other end is set as a first mortise, the first mortise is used in conjunction with the first tenon, and the end faces of the first tenon and the first mortise are at right angles.

[0017] Preferably, the large operating table and the small operating table are both U-shaped structures, and the sides and bottoms of the large operating table and the small operating table are provided with a third hole. The bottom of the large operating table is provided with a first groove, and the top of the small operating table is provided with a second groove, and the first groove is used in conjunction with the second groove.

[0018] Preferably, the holes on the sides of the large operating table and the small operating table are arranged in two rows up and down.

[0019] Preferably, a screw nut groove is provided on the surface of one side of two of the six-hole woods, and the screw nut groove is used to install the second threaded shaft.

[0020] Preferably, one side of each of the wheels is flat, and the other side is printed with symbols, patterns and Arabic numerals. The wheels are rotatably mounted on the operating table via a third threaded shaft. Both ends of the third threaded shaft are threadedly sleeved with star-shaped inserts, the star-shaped inserts are clamped with the wheels, and the third threaded shaft is installed through a third hole.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention realizes the fun of simple combination and complex combination, has the operation characteristics of integrating low structure and high structure, realizes the effective interaction of desktop operation and outdoor operation educational activities, has the characteristics of teaching and playing, and effectively extending educational activities indoors and outdoors. When used as a children's family toy, it can form a connection with the educational activities carried out by early childhood education institutions, generate relevance and complementarity, and promote the in-depth development of family parent-child education activities.

[0023] 2. The wooden holes can be connected individually, each wooden hole can be connected individually, or 25 wooden holes can be seamlessly connected into a straight line, or they can be connected into an irregular circle with an arc, or simply connected or arranged to form an image pattern.

[0024] 3. The hole wood in the present invention can be assembled to form a two-dimensional plane figure, wherein the second hole arranged on the side of the hole wood can be assembled to form a three-dimensional figure through the second threaded shaft, transforming from a two-dimensional structure to a three-dimensional structure, which can fully develop children's three-dimensional thinking, thereby improving children's thinking ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front structure of an educational toy building block after installation based on an improved mortise and tenon structure proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the back structure of an educational toy building block after installation based on an improved mortise and tenon structure proposed by the present invention;

[0027] Figure 3 It is a schematic diagram of a square structure;

[0028] Figure 4 It is a schematic diagram of a square explosion structure;

[0029] Figure 5 Schematic diagram of the connection structure of the No. 1 hole wood and the No. 2 hole wood;

[0030] Figure 6 is a schematic diagram of the connection structure of the first threaded rod;

[0031] Figure 7 is a schematic diagram of the connection structure of the second threaded rod;

[0032] Figure 8 is a schematic diagram of the connection structure of the third threaded rod;

[0033] Fig. 9 It is a structural diagram of a large operating table;

[0034] Fig.10 It is a structural diagram of a small operating table;

[0035] Fig.11 It is a schematic diagram of the plane structure of the aircraft assembled from hollow wood;

[0036] Fig.12 It is a structural schematic diagram of the screw nut groove;

[0037] Fig.13 It is a schematic diagram of the front structure of the three-dimensional model assembled by Kongmu;

[0038] Fig.14 This is a schematic diagram of the structure of a three-dimensional model assembled with holes and wood, viewed from above.

[0039] In the figure: 1 No. 1 hole wood, 2 No. 2 hole wood, 3 No. 3 hole wood, 4 No. 4 hole wood, 5 No. 5 hole wood, 6 No. 6 hole wood, 7 No. 7 hole wood, 8 large operating table, 9 small operating table, 10 wheel, 11 first threaded shaft, 12 second threaded shaft, 13 nut groove, 14 nut, 15 sleeve, 16 first hole, 17 second hole, 18 first mortise, 19 first tenon, 20 second mortise, 21 third mortise, 22 second tenon, 23 third hole, 24 first groove, 25 second groove, 26 third threaded shaft, 27 star-shaped insert, 28 third tenon. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1-Figure 14 , an educational toy building block based on an improved mortise and tenon structure, comprising:

[0042] The base is used for support, and the base includes a large operating table 8 and a small operating table 9; the large operating table 8 and the small operating table 9 are both U-shaped structures, and the sides and bottoms of the large operating table 8 and the small operating table 9 are provided with third holes 23, the bottom of the large operating table 8 is provided with a first groove 24, and the upper part of the small operating table 9 is provided with a second groove 25, and the first groove 24 and the second groove 25 are used in conjunction with each other. When assembling, the large operating table 8 and the small operating table 9 can be used separately, or the first groove 24 and the second groove 25 can be staggered and connected with each other to form a cross-shaped structure for use, and the holes on the sides of the large operating table 8 and the small operating table 9 are arranged in two rows up and down.

[0043] One side of each wheel 10 is flat, and the other side is printed with symbols, patterns and Arabic numerals. The wheel 10 is rotatably mounted on the operating table through the third threaded shaft 26. Both ends of the third threaded shaft 26 are threadedly sleeved with star-shaped inserts 27, and the star-shaped inserts 27 are clamped with the wheel 10. The third threaded shaft 26 is installed through the third hole 23. The wheel 10 can be installed on the side of the operating table. The two wheels 10 cooperate with each other to realize the movement of the assembled toy and form the shape of a small car. At the same time, the wheel 10 can also be horizontally rotated and installed at the bottom of the operating table, so that the assembled building blocks can form a structure that can be fully displayed 360 degrees, and can be displayed on the table by self-rotating outward (reference Fig.14 ).

[0044] The total number of hole woods of the second groove 25 is four length specifications of the plurality of hole woods, and the four length specifications are in a progressive relationship, and the plurality of hole woods are a plurality of No. 1 hole wood 1, No. 2 hole wood 2, No. 3 hole wood 3, No. 4 hole wood 4, No. 5 hole wood 5, No. 6 hole wood 6, and No. 7 hole wood 7;

[0045] The number one hole wood 1 and the two number two hole woods 2 are combined into an isosceles right triangle, the number three hole wood 3 and the two number four hole woods 4 are combined into an isosceles right triangle, the number five hole wood 5 and the two number six hole woods 6 are combined into an isosceles right triangle, and the four number seven hole woods 7 are combined into a square, the number five hole wood 5 is the same length as the number four hole wood 4, the number three hole wood 3 is the same length as the number two hole wood 2, and the number seven hole wood 7 is the same length as the number six hole wood 6;

[0046] Each hole wood has a plurality of first holes 16 passing through it on one side and a plurality of second holes 17 passing through it on the other side, and the positions of the second holes 17 and the first holes 16 are staggered. The first holes 16 and the second holes 17 pass through the four sides of the hole wood, so that the hole woods can be connected to each other and can be stacked horizontally or vertically.

[0047] The connection mechanism is used for connection, and the connection mechanism includes a plurality of first threaded shafts 11 and a plurality of second threaded shafts 12 .

[0048] The first threaded shaft 11 is used to pass through the first hole 16, and both ends of the first threaded shaft 11 are threadedly sleeved with a clamping sleeve 15, and the material of the clamping sleeve 15 is rubber. When two hole woods are connected and combined into a geometric shape, the first threaded shaft 11 passes through the first hole 16 at the staggered position of the ends of the two hole woods, and the two ends of the first threaded shaft 11 are limited and fixed by the clamping sleeve 15.

[0049] Both ends of the No. 1 hole wood 1 and the No. 5 hole wood 5 are set to the second mortise 20, and the end face of the second mortise 20 is 45 degrees. Multiple No. 2 hole wood 2, No. 4 hole wood 4, and No. 6 hole wood 6 are divided into two groups, namely the first group and the second group. One end of the first group is set to the second tenon 22, and the other end is set to the third tenon 28, and the end face of the second tenon 22 is 45 degrees. One end of the second group is set to the third tenon 28, and the end face of the third tenon 21 is a right angle, and the other end is set to the second tenon 22. The second tenon 22 is inserted into the second tenon 20 for installation, and the third tenon 28 is inserted into the third tenon 21 for installation. The first hole 16 also passes through the second tenon 20, the third tenon 21, and the second tenon 22. When assembling a triangle, taking the No. 1 hole wood 1 as an example, both ends of the No. 1 hole wood 1 are second mortise 20, which can be used to insert the second tenon 22, and the third mortise 21 at one end of the No. 2 hole wood 2 is inserted into the third tenon 28. When the No. 2 hole wood 2 is connected to the No. 1 hole wood 1, the angle between them is 45 degrees. When the two No. 2 hole woods 2 are connected, a right angle is formed. The mortise and tenon structure forms the slope and connection points of the triangle. After the triangle is built, the 45-degree angle can be connected to another 45-degree angle.

[0050] One end of the second threaded shaft 12 is also sleeved with a ferrule 15, and the other end of the second threaded shaft 12 is threadedly sleeved with a nut 14, and the length of the second threaded shaft 12 exceeds the thickness of the two hole woods. The second threaded shaft 12 is an extended structure, which can connect two hole woods, so that when assembling the graphics, multiple closed graphics can be connected together, and the second threaded shaft 12 can be used for superimposed or flat connection.

[0051] One end of each No. 7 hole wood 7 is set as a first tenon 19, and the other end is set as a first mortise 18. The first mortise 18 is used in conjunction with the first tenon 19. The end faces of the first tenon 19 and the first mortise 18 are at right angles. Multiple No. 7 hole woods 7 are assembled and connected at the ends to form a geometric shape.

[0052] Each hole wood can be installed and connected in a flat manner, or two hole woods can be overlapped at any angle for assembly (refer to Fig.13), thus transforming from a two-dimensional graphic to a three-dimensional graphic, which has a positive effect on the development of children's spatial intelligence. Compared with flat graphics, when multiple hole woods of this product are assembled together, there is no limit on the number of hole woods that can be used. Three-dimensional models can be built arbitrarily, creating a huge space, which has a positive effect on cultivating children's intelligence.

[0053] When children are playing, the large operating table 8 and the small operating table 9 can be used as the foundation, and the building blocks can be continuously connected on the surface through the third holes 23. Each hole wood can be connected individually, or 25 hole wood can be seamlessly connected into a straight line, or they can be connected in an arc to form an irregular circle, or simply connected or arranged to form an image pattern, such as: square, rectangle, parallelogram, trapezoid, motor vehicle, car, ship, windmill, crane, etc. The shapes can be connected to each other to build nearly a thousand shapes, such as birds, beasts, objects, people, or zodiac patterns.

[0054] The specific connection method is as follows:

[0055] A large isosceles right triangle can be formed by combining the No. 1 hole wood 1 and the two matching No. 2 hole woods 2, a medium-sized isosceles right triangle can be formed by combining the No. 3 hole wood 3 and the two matching No. 4 hole woods 4, a small isosceles right triangle can be formed by combining the No. 5 hole wood 5 and the two matching No. 6 hole woods 6, and four No. 7 hole woods 7 can be assembled into a square. Taking a large isosceles right triangle as an example, the No. 1 hole wood 1 and the No. 2 hole wood 2 are fixedly connected together by the first threaded shaft 11, and the two No. 2 hole woods 2 are also fixedly connected by the first threaded shaft 11. The two pieces are fixedly connected together, the second tenon 22 at one end of a No. 2 hole wood 2 is inserted into the second mortise 20 at the end of the No. 1 hole wood 1, the second tenon 22 at the other end of a No. 2 hole wood 2 is inserted into the third mortise 21 at the end of another No. 2 hole wood 2, and the other end of another No. 2 hole wood 2 is inserted into the second mortise 20 at the other end of the No. 1 hole wood 1. When connecting, the first threaded shaft 11 is passed through the first hole 16 at the connection, and finally the first threaded shaft 11 is fixed by threading the clamping sleeve 15.

[0056] The two assembled geometric figures are connected by the second threaded shaft 12. According to the combination, the second threaded shaft 12 passes through the two contacting hole woods at the same time, passes through the first hole 16 or the second hole 17, and one end of the second threaded shaft 12 is limited and fixed by the clamping sleeve 15, and the other end is fixed by the nut 14, thereby realizing the splicing between the geometric figures.

[0057] The size ratios of the various components are as follows (the units represent the same conversion standard):

[0058] Small operating table 9 is 16 units long and 3.4 units wide, with a groove in the middle, 33 units wide and 1.5 units deep. There is a groove on one side: the groove is 16 units long, 1.8 units deep and 1.8 units wide. There are 2 90-degree grooves at the bottom. There are 4 symmetrical "U" grooves on both sides of the groove, and the "U" groove is 1.8 units deep and 1.8 units wide. The diameter of the holes on both sides and the bottom of the groove is 7.5 units.

[0059] The shortest two sides of the small operating table 9 are consistent with the length of the 16 units, and the double holes on both sides and the holes at the bottom are consistent with the hole spacing of the holes. The 90-degree groove at the bottom of the small operating table 9, that is, the first groove 24, can set up a right-angle corner point, and the holes on the corner edges can just form a connection with the holes on the two sides and be fixed with a threaded shaft.

[0060] The "U"-shaped grooves on both sides of the small operating table groove (groove depth 1.8 units, width 1.8 units) can be used to place graphics with threaded shafts in the "U" grooves.

[0061] The wheel 10 has two specifications, six in each, with a thickness of 1 unit and a diameter of 3.3 units. There is a hole in the middle with a diameter of 7.5 units, which is consistent with the hole of the hole wood.

[0062] There are two specifications of wheels 10. One specification has a "+" sign engraved on the upper part and a "-" sign engraved on the lower part by laser. Another specification has a "=" sign engraved on the upper part by laser, and the other wheels have Arabic numerals "0--9" engraved on the upper part by laser. When engraving the symbols and numbers, simple patterns of the twelve zodiac signs are first printed underneath. The wheels can be used for calculation by children and are interesting, playable, have monetary functions, pre-calculations, and are artistic.

[0063] The first threaded shaft 11 is 45 units in length and connects a single triangular mortise and tenon joint to achieve shape forming; the second threaded shaft 12 is 59 units in length and connects a single triangular mortise and tenon joint to achieve shape forming; the third threaded shaft 26 is 63 units in length and is used for connecting between hole wood and large and small operating tables, for connecting and fixing between the wheel 10 and large and small operating tables, or for any connection use.

[0064] The quantitative relationship between the holes and wood is as follows:

[0065] There are 11 logs with a tenon at one end and a mortise at the other end, 7 logs with mortise at both ends, and 7 logs with tenons at both ends. 7 of the tenons are at a 45-degree angle, forming a parallelogram. 14 of the tenons are at a 45-degree angle, forming a parallelogram. 11 of the tenons are at a 90-degree angle, forming a square shape, and 4 of the mortise are at a 90-degree angle, forming a square groove, and 7 of the mortise are at a 45-degree angle, forming a parallelogram.

[0066] 45 degree tenon: length 42.6 units, thickness 0.6 units; 90 degree tenon: length 18 units, thickness 0.6 units; 45 degree mortise: length 42.6 units, thickness 0.6 units; 90 degree mortise: length 18 units, thickness 0.6 units.

[0067] Among them: the two 16-unit holes have screw cap grooves 13 (depth 0.8 units, diameter 1.8 units), and the 32-unit hole has a laser engraved 20-unit scale. The two 32-unit long holes have the same arrangement order, and the other 23 holes have the same arrangement order.

[0068] The numerical relationship between the holes and the wood can form isosceles right triangles and squares of three sizes. The numerical values ​​of these four figures are related to each other. A numerical value in one figure is consistent with a numerical value in another figure. For example, the waist (22.6 units) of an isosceles right triangle with a base of 32 units is the base of another isosceles right triangle, the waist (16 units) of an isosceles right triangle with a base of 22.6 units is the base of another isosceles right triangle, and the waist (11.4 units) of an isosceles right triangle with a base of 16 units is the side length of the square. According to the Pythagorean theorem, the numerical values ​​in the above cases are approximate.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An educational toy building block based on an improved mortise and tenon structure, characterized in that: include: A base for supporting, the base comprising a large operating table (8) and a small operating table (9); A total of the second groove (25) of the hole wood, the plurality of hole wood having four length specifications, and the four length specifications are in a progressive relationship, and the plurality of hole woods are respectively a plurality of No. 1 hole wood (1), a No. 2 hole wood (2), a No. 3 hole wood (3), a No. 4 hole wood (4), a No. 5 hole wood (5), a No. 6 hole wood (6), and a No. 7 hole wood (7); The No. 1 hole wood (1) and the two No. 2 hole woods (2) are combined into an isosceles right triangle, the No. 3 hole wood (3) and the two No. 4 hole woods (4) are combined into an isosceles right triangle, the No. 5 hole wood (5) and the two No. 6 hole woods (6) are combined into an isosceles right triangle, and the four No. 7 hole woods (7) are combined into a square, the No. 5 hole wood (5) and the No. 4 hole wood (4) have the same length, the No. 3 hole wood (3) and the No. 2 hole wood (2) have the same length, and the No. 7 hole wood (7) and the No. 6 hole wood (6) have the same length; A connection mechanism for connection, the connection mechanism comprising a plurality of first threaded shafts (11) and a plurality of second threaded shafts (12); A wheel (10) is mounted on the base, and the wheel (10) is used for moving building blocks.

2. The educational toy building block based on the improved mortise and tenon structure according to claim 1, characterized in that: Each of the hole woods is provided with a plurality of penetrating first holes (16) on one side and a plurality of penetrating second holes (17) on the other side, and the positions of the second holes (17) and the first holes (16) are staggered with each other.

3. The educational toy building block based on the improved mortise and tenon structure according to claim 2, characterized in that: The first threaded shaft (11) is used to pass through the first hole (16), and both ends of the first threaded shaft (11) are threadedly sleeved with a clamping sleeve (15), and the material of the clamping sleeve (15) is rubber.

4. The educational toy building block based on the improved mortise and tenon structure according to claim 3, characterized in that: Both ends of the No. 1 hole wood (1) and the No. 5 hole wood (5) are provided with second mortise (20), and the end face of the second mortise (20) is 45 degrees. The plurality of No. 2 hole wood (2), No. 4 hole wood (4), and No. 6 hole wood (6) are divided into two groups, namely the first group and the second group. One end of the first group is provided with the second tenon (22), and the other end is provided with the third tenon (28), and the end face of the second tenon (22) is 45 degrees. One end of the second group is provided with the third tenon (28), and the end face of the third tenon (21) is a right angle, and the other end is provided with the second tenon (22). The second tenon (22) is inserted into the second tenon (20) for installation, and the third tenon (28) is inserted into the third tenon (21) for installation. The first hole (16) also passes through the second tenon (20), the third tenon (21), and the second tenon (22).

5. The educational toy building block based on the improved mortise and tenon structure according to claim 1, characterized in that: One end of the second threaded shaft (12) is also sleeved with a clamping sleeve (15), and the other end of the second threaded shaft (12) is threadedly sleeved with a nut (14), and the length of the second threaded shaft (12) exceeds the thickness of the two hole woods.

6. The educational toy building block based on the improved mortise and tenon structure according to claim 1, characterized in that: One end of each of the No. 7 hole woods (7) is set as a first tenon (19), and the other end is set as a first mortise (18). The first mortise (18) is used in conjunction with the first tenon (19), and the end faces of the first tenon (19) and the first mortise (18) are at right angles.

7. The educational toy building block based on the improved mortise and tenon structure according to claim 1, characterized in that: The large operating table (8) and the small operating table (9) are both U-shaped structures. The sides and bottoms of the large operating table (8) and the small operating table (9) are both provided with third holes (23). The bottom of the large operating table (8) is provided with a first groove (24). The top of the small operating table (9) is provided with a second groove (25). The first groove (24) and the second groove (25) are used in conjunction with each other.

8. The educational toy building block based on the improved mortise and tenon structure according to claim 7, characterized in that: The holes on the sides of the large operating table (8) and the small operating table (9) are both arranged in two rows from top to bottom.

9. The educational toy building block based on the improved mortise and tenon structure according to claim 1, characterized in that: A screw nut groove (13) is provided on the surface of one side of two of the six-hole woods (6), and the screw nut groove (13) is used to install the second threaded shaft (12).

10. The educational toy building block based on the improved mortise and tenon structure according to claim 7, characterized in that: One side of each wheel (10) is flat, and the other side is printed with symbols, patterns and Arabic numerals. The wheel (10) is rotatably mounted on the operating table via a third threaded shaft (26). Both ends of the third threaded shaft (26) are threadedly sleeved with star-shaped inserts (27). The star-shaped inserts (27) are clamped with the wheel (10). The third threaded shaft (26) passes through a third hole (23) for installation.

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