Portable circumference measuring device for primary school mathematics teaching

Abstract

The invention provides a portable circumference measuring device for primary school mathematics teaching, and the structure of the portable circumference measuring device comprises a circle center positioning body, a center block, straight columns, a size layer, and an edge positioning body, the circle center positioning body and the center block intersect with each other, and the right and left sides of the center block are connected with the straight columns. The lower layer of the straight column is provided with a size layer through which the edge positioning body penetrates, and the central area is also provided with a linear slide rail through which the edge positioning body slides in the size layer area; after the center block is further improved, the circle center positioning body can be detached through the circular adaptive groove in the block body, and meanwhile, the two straight columns are detached through the contact ends on the left side and the right side and the insertion grooves, so that the detachable effect is achieved; and then the situation that the original integral shape is difficult to load and carry can be replaced by simple disassembly and assembly, so that the portable characteristic can be achieved by collecting the parts through disassembly, and the situation that a large space of the schoolbag is occupied by an integral cross shape is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of teaching aids, and more specifically to a portable circumference measuring device for elementary school mathematics teaching. Background Art

[0002] Primary school mathematics is to teach children a series of knowledge about number recognition, four arithmetic operations, graphics and length calculation formulas, unit conversion, etc. through textbooks, laying a good mathematical foundation for calculations in junior high school and daily life; Therefore, in the process of mathematics teaching, the circumference of the corresponding figure needs to be measured by a relevant measuring device, so that when measuring the circumference of a circular pattern, its radius can be measured by a special circumference measuring device, and then the circumference of the circle can be calculated by applying the relevant formula. Therefore, the circumference measuring device can effectively improve the measurement accuracy of the circumference of the circle; In summary, the inventors have found that the existing circumference measuring devices mainly have the following defects: since the current circumference measuring devices are all in an integrated form, the intersecting "cross" shape will make them difficult to carry, and they will take up too much storage space when put into a school bag, which will reduce the convenience of using the current circumference measuring devices and make them incompatible with the characteristics of being portable. At the same time, the overlapping area between the measuring device and the center of the "circle" is a sharp-angled shape, so that it is very easy to rub the paper or other panels during positioning, which may cause damage to the exercise book or panel. Summary of the invention

[0003] The technical solution adopted by the present invention to achieve the technical purpose is: a portable circular measuring device for elementary school mathematics teaching, whose structure includes: a center positioning body, a center block, a straight column, a dimension layer, and an edge positioning body. The center positioning body and the center block intersect with each other and the left and right sides of the center block are connected with straight columns. The lower layer of the straight column is provided with a dimension layer for the edge positioning body to pass through, and a linear slide rail is also opened in the central area to allow the edge positioning body to slide in the dimension layer area.

[0004] As a further improvement of the present invention, the center block is provided with a splicing module, which is installed on the left and right end edges of the block and the center part is embedded in the center of the slot at the contact end. A vertical adaptation groove is also opened in the center part of the middle section of the block to match the center positioning body.

[0005] As a further improvement of the present invention, the splicing module is provided with an adsorption sheet, which overlaps with the surface of the protrusion and is also connected to a restraining block at the center of the other end of the protrusion. The restraining block is inserted into the inner center of the slot parallel to the protrusion and is interlaced and connected with one end of the straight column.

[0006] As a further improvement of the present invention, the center positioning body can be vertically disassembled and assembled through the center adapter groove of the center block, and at the same time, the contact ends at the left and right ends will be combined with the slots to allow one end of the straight column to be installed, and then the splicing module will insert and fix one end of the straight column through the adsorption piece of the protrusion and the restraining block arranged in the slot.

[0007] As a further improvement of the present invention, the center positioning body is provided with an overlapping block, the upper end of the overlapping block is connected to a screw rod and the screw rod passes through the center of the positioning sleeve and enters the interior of the locking column for threaded connection, and the top of the locking column includes a control body.

[0008] As a further improvement of the present invention, the overlapping block is perpendicular to the screw and the diameter of the positioning sleeve is larger than the lower end area of ​​the locking column. A vertical thread groove is opened inside the locking column to match the screw. The control body is circular and is arranged in the upper center area of ​​the locking column.

[0009] As a further improvement of the present invention, the lower layer of the overlapping block also includes a protective ring, which inserts the rubber disc through the internal assembly cavity. The edge of the rubber disc is also provided with a connecting ring and small bolts, which are locked to the internal area of ​​the protective ring through the small bolts and the connecting ring.

[0010] As a further improvement of the present invention, the assembly cavity of the protection ring is in a concave shape to allow the rubber disc to be embedded, and there are four small bolts on the edge of the rubber disc.

[0011] As a further improvement of the present invention, the edge positioning body is provided with a parallel block, the upper center of the parallel block is connected to a pull block and the lower center also includes a solid rod, the lower end of the solid rod is connected to a parallel pulley and the lower end of the parallel pulley is fixed with a measuring block.

[0012] As a further improvement of the present invention, the pulling block and the parallel block are perpendicular to each other and the solid rod at the lower end of the parallel block restrains the center of the parallel pulley, and the measuring block is in a triangular trapezoidal shape.

[0013] As a further improvement of the present invention, the parallel block is provided with a penetration layer, the center of the lower end of the penetration layer is connected to the center of the jacket, the jacket is arranged in the central internal area of ​​the fixed block and the left and right sides of the fixed block also include positioning rods, and the anti-deviation block is fixed to the lower ends of the left and right sides of the fixed block through the positioning rods.

[0014] As a further improvement of the present invention, the shape of the penetration layer matches the shape of the pulling block and the jacket is set in a vertical orientation, and the positioning rods on the left and right sides of the fixed block each carry a solid anti-deflection block.

[0015] As a further improvement of the present invention, the center positioning body is arranged in the middle of the center block and the straight column is an independent rectangular shape and the lower end dimension layer is set in a plane orientation. A sliding rail is also opened in the straight column and the edge positioning body area, and the number of edge positioning bodies is consistent with the number of straight columns.

[0016] As a further improvement of the present invention, the adapter groove is circular in shape and matches the shape of the center positioning body. The left and right sides of the block are equipped with flattened contact ends and square slots. The left and right edge areas of the slots are also provided with connecting grooves for inserting the splicing modules.

[0017] As a further improvement of the present invention, the adsorption sheet covers the surface of the bump. There are two bumps in total and they are connected as a whole through a "concave" shaped restraining block. The bump can be embedded in the slot in parallel through the restraining block, and the center of the straight column can be inserted and aligned through the restraining block.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is further improved by the central block. The circular adapter groove in the block allows the center positioning body to be removed. At the same time, the contact ends and slots on the left and right sides allow the two straight columns to be removed, thereby achieving a detachable effect. Then, simple disassembly and assembly can replace the original one-piece shape that makes it difficult to load and carry. Then, disassembly and collection of parts can achieve the characteristics of portability and avoid the large amount of space in the schoolbag occupied by the one-piece "cross" shape.

[0019] 2. The present invention is further improved by the center positioning body. The protective ring added to the lower layer of the overlapping block and the rubber disk in the assembly cavity can replace the original sharp corners to contact the center of the circle on the panel or the workbook. The rubber overlap can avoid puncturing the panel or the workbook. At the same time, the anti-slip property of the rubber can improve the alignment effect of the center of the circle. Subsequently, the screw at the upper end of the overlapping block can be threadedly connected with the inside of the locking column of the control body, so that it can be easily disassembled and assembled from the adapter groove area of ​​the center block, thereby improving the convenience of disassembly and assembly and improving the strength effect of portability.

[0020] 3. The present invention is further improved from the edge positioning. The solid rod at the lower end of the parallel block is controlled by the pulling block to drive the parallel pulley to slide linearly in the slide rail area opened by the straight column. Therefore, the measuring block can achieve the effect of determining the size through the size layer, and then the parallel pulley can improve the adjustment smoothness of the measuring block. Then, after the position of the measuring block is adjusted, the anti-bias blocks carried on the left and right sides of the lower layer of the parallel block can be pressed down from the straight column slide rail area by the pulling block and the parallel block, so that the anti-bias block can be inserted into the slide rail edge area of ​​the straight column to achieve the positioning effect, thereby avoiding the automatic deviation of the measuring block caused by external force during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a structural schematic diagram of a portable circle measuring device for primary school mathematics teaching.

[0022] Figure 2 The present invention is a schematic diagram of a three-dimensional structure after the central block is improved.

[0023] Figure 3 The present invention is a schematic diagram of a three-dimensional structure after improvement of a splicing module.

[0024] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of an improved circle center positioning body.

[0025] Figure 5 This is a schematic diagram of the structure of an improved overlapping block from a top view.

[0026] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of an improved edge positioning body.

[0027] Figure 7 The present invention is a schematic structural diagram of a parallel block after improvement.

[0028] In the figure: center positioning body-1, center block-2, straight column-3, dimension layer-4, edge positioning body-5; Adaptation slot-21, block-22, contact end-23, slot-24, splicing module-25; Adsorption sheet-251, bump-252, restraining block-253; Overlapping block-11, screw rod-12, positioning sleeve-13, locking column-14, control body-15; Protective ring 111, assembly cavity 112, rubber disc 113, connecting ring 114, small bolt 115; Pull block-51, parallel block-52, solid rod-53, parallel pulley-54, measuring block-55; Penetration layer-521, jacket-522, fixing block-523, positioning rod-524, anti-deviation block-525. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings: Example

[0030] Figures 1 to 7 As shown: The present invention provides a portable circumference measuring device for elementary school mathematics teaching. Its structure includes a center positioning body 1, a center block 2, a straight column 3, a dimension layer 4, and an edge positioning body 5. The center positioning body 1 and the center block 2 intersect each other, and the left and right sides of the center block 2 are connected with straight columns 3. The lower layer of the straight column 3 is provided with a dimension layer 4 to allow the edge positioning body 5 to pass through, and a linear slide rail is also opened in the central area to allow the edge positioning body 5 to slide in the dimension layer 4 area.

[0031] Among them, the central block 2 is provided with a splicing module 25, which is installed on the left and right end edges of the block 22 and the center part is embedded in the inner center of the slot 24 of the contact end 23. A vertical adaptation groove 21 is also opened in the center part of the middle section of the block 22 to match the center positioning body 1.

[0032] Among them, the splicing module 25 is provided with an adsorption sheet 251, the adsorption sheet 251 and the surface of the protrusion 252 overlap each other, and the center of the other end of the protrusion 252 is also connected to a restraining block 253, and the restraining block 253 is embedded in the inner center of the slot 24 parallel to the protrusion 252 and is interlaced and connected with one end of the straight column 3.

[0033] Among them, the center adapter groove 21 of the block body 22 of the center block 2 allows the center positioning body 1 to be vertically disassembled and assembled, and at the same time, the contact ends 23 at the left and right ends will be combined with the slot 24 to allow one end of the straight column 3 to be installed, and then the splicing module 25 will insert and fix one end of the straight column 3 through the adsorption piece 251 of the protrusion 252 and the restraining block 253 arranged in the slot 24.

[0034] The center positioning body 1 is provided with an overlapping block 11 , the upper end of which is connected with a screw 12 and passes through the center of the positioning sleeve 13 and enters the interior of the locking column 14 for threaded connection. The top of the locking column 14 includes a control body 15 .

[0035] Among them, the overlapping block 11 and the screw rod 12 are perpendicular to each other and the diameter of the positioning sleeve 13 is larger than the lower end area of ​​the locking column 14. A vertical thread groove is opened inside the locking column 14 to adapt to the screw rod 12. The control body 15 is circular and is arranged in the upper center area of ​​the locking column 14.

[0036] The lower layer of the overlapping block 11 also includes a protective ring 111, and the protective ring 111 inserts the rubber disc 113 through the internal assembly cavity 112. The edge of the rubber disc 113 is also provided with a connecting ring 114 and a small bolt 115, which is locked to the internal area of ​​the protective ring 111 through the small bolt 115 and the connecting ring 114.

[0037] The assembly cavity 112 of the protection ring 111 is in a concave shape to allow the rubber disc 113 to be embedded, and there are four small bolts 115 on the edge of the rubber disc 113.

[0038] The edge positioning body 5 is provided with a parallel block 52 , the upper center of the parallel block 52 is connected with a pull block 51 and the lower center also includes a solid rod 53 , the lower end of the solid rod 53 is connected with a parallel pulley 54 and the lower end of the parallel pulley 54 is fixed with a measuring block 55 .

[0039] The pulling block 51 and the parallel block 52 are perpendicular to each other, and the solid rod 53 at the lower end of the parallel block 52 restrains the center of the parallel pulley 54, and the measuring block 55 is in a triangular trapezoidal shape.

[0040] Among them, the parallel block 52 is provided with a penetration layer 521, the center of the lower end of the penetration layer 521 is connected to the center of the jacket 522, the jacket 522 is arranged in the central internal area of ​​the fixed block 523 and the left and right sides of the fixed block 523 also include positioning rods 524, and the anti-deviation block 525 is fixed to the lower ends of the left and right sides of the fixed block 523 through the positioning rods 524.

[0041] The shape of the penetration layer 521 matches that of the pull block 51 , and the jacket 522 is set in a vertical position. The positioning rods 524 on the left and right sides of the fixed block 523 each carry a solid anti-deviation block 525 .

[0042] Among them, the center positioning body 1 is arranged in the middle of the center block 2 and the straight column 3 is an independent rectangular shape and the lower end dimension layer 4 is set in a plane orientation. A slide rail is also opened in the area of ​​the straight column 3 and the edge positioning body 5, and the number of edge positioning bodies 5 is the same as the number of straight columns 3.

[0043] The adapting groove 21 is circular in shape and matches the shape of the center positioning body 1. The left and right sides of the block 22 are equipped with flat contact ends 23 and square slots 24. The left and right edge areas of the slots 24 are also provided with connecting grooves for inserting the splicing module 25.

[0044] Among them, the adsorption sheet 251 covers the surface of the protrusion 252. There are two protrusions 252 and they are connected as a whole through a "concave" shaped restraining block 253. The protrusion 252 can be embedded in the slot 24 in parallel through the restraining block 253, and the center of the straight column 3 can be inserted and aligned through the restraining block 253.

[0045] Specific functions and operation procedures of this embodiment: In the present invention, the circumference measuring device for elementary school mathematics can overlap the center of the circle through the center positioning body 1 of the center block 2, and then the straight columns 3 on the left and right sides can use the opened slide rails to allow the edge positioning body 5 to be adjusted in the size layer 4 area, so that the circle diameter can be measured through the edge positioning bodies 5 and the size layer 4 on both sides, and then the circumference size can be calculated by combining the relevant formulas, and then the block body 22 of the center block 2 can allow the center positioning body 1 to penetrate vertically through the adapter groove 21 in the center part, and then the center positioning body 1 will allow the screw 12 of the overlapping block 11 to be interlaced and threaded through the locking column 14 and the positioning sleeve 13 at the lower end of its own control body 15, so that it can achieve a detachable effect, and then after use, the overlapping block 1 When the screw rod 12 is separated from the locking column 14 area, it can be completely separated from the adapting groove 21 of the block 22, so that the integrated "cross" shape can be changed to achieve the effect of separate storage, and then it will not occupy a lot of space in the schoolbag, so that it can meet the effect of portability. Then the protective ring 111 of the lower layer of the overlapping block 11 can allow the rubber disc 113 to be embedded through the assembly cavity 112, and then the rubber disc 113 can be stably installed in the lower center of the overlapping block 11 through the connecting ring 114 and the small bolt 115. For this reason, the rubber property of the rubber disc 113 replaces the original sharp corner shape to overlap with the circular center, thereby avoiding the situation of puncturing the exercise book and the panel caused by the original sharp corner positioning, and at the same time utilizing the anti-slip property of the rubber disc 113 The performance prevents automatic sliding during measurement, thereby improving the measurement accuracy. Furthermore, the contact ends 23 on the left and right sides of the block 22 can be combined with the slots 24 to allow the splicing module 25 to be embedded, so that the splicing module 25 can be inserted and adsorbed and spliced ​​with one end of the straight column 3 through the restraining block 253 of the protrusion 252 and the adsorption sheet 251. Therefore, the length of the center block 2 and the straight column 3 can be disassembled and shortened through simple disassembly and assembly, thereby avoiding the situation that the length is greater than the width or depth of the school bag and is difficult to carry. For this reason, the portable characteristics can be further improved. Finally, the parallel block 52 of the edge positioning body 5 can control the parallel pulley 54 of the lower solid rod 53 through the upper pull block 51, so that the parallel pulley 54 can improve its own sliding in the straight column 3 through the cooperation. The parallel sliding smoothness of the rail area can improve the convenience of adjusting the position of the measuring block 55. Before adjustment, the solid rod 53 of the parallel block 52 is pulled upward by the pulling block 51, so that the anti-deflection blocks 525 on the left and right sides of the parallel block 52 can be separated from the internal area of ​​the parallel block 52. After the adjustment is completed, the positioning rods 524 on the left and right sides of the parallel block 52 can determine the position of the anti-deflection block 525, so that the anti-deflection block 525 can be inserted into the edge area of ​​the straight column 3 again through its own position, thereby achieving the effect of adjusting the positioning of the measuring block 55, avoiding the automatic sliding of the measuring block 55 during measurement, and improving the measurement stability. Then, the fixed block 523 of the parallel block 52 can allow the pulling block 51 to be embedded through the central penetration layer 521.The connecting block at the lower end of the pull block 51 can enter the jacket 522 area, which improves the convenience of assembly, so that the measuring device can meet the characteristics of portability and improves the stability during measurement.

[0046] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.

Claims

1. A portable circumference measuring device for primary school mathematics teaching, the structure of which includes: A center positioning body (1), a center block (2), a straight column (3), a dimension layer (4), and an edge positioning body (5), wherein the center positioning body (1) and the center block (2) intersect each other and the center block (2) is connected to the left and right sides with straight columns (3), the lower layer of the straight column (3) is provided with a dimension layer (4) for the edge positioning body (5) to penetrate, and a linear slide rail is also opened in the center area to allow the edge positioning body (5) to slide in the dimension layer (4) area, characterized in that: The central block (2) is provided with a splicing module (25), the splicing module (25) is installed on the left and right edges of the block body (22) and the center portion is embedded in the center of the slot (24) of the contact end (23), and a vertical adapting groove (21) is also opened in the center portion of the middle section of the block body (22) to match the center positioning body (1); The splicing module (25) is provided with an adsorption sheet (251), the adsorption sheet (251) and the surface of the protrusion (252) overlap each other, and the center of the other end of the protrusion (252) is also connected to a restraining block (253), and the restraining block (253) is inserted into the inner center of the slot (24) parallel to the protrusion (252) and connected with one end of the straight column (3); The center positioning body (1) is vertically disassembled and assembled through the center adapting groove (21) of the block body (22) of the center block (2), and at the same time, the contact ends (23) at the left and right ends are combined with the slots (24) to allow one end of the straight column (3) to be inserted, and then the splicing module (25) is inserted and fixed through the adsorption sheet (251) of the protrusion (252) and the restraining block (253) arranged in the slot (24).

2. A portable circular measuring device for elementary school mathematics teaching according to claim 1, characterized in that: The center positioning body (1) is provided with an overlapping block (11), the upper end of the overlapping block (11) is connected to a screw rod (12) and the screw rod (12) penetrates the center of the positioning sleeve (13) and enters the interior of the locking column (14) for threaded connection, and the top of the locking column (14) includes a control body (15); The overlapping block (11) and the screw rod (12) are perpendicular to each other and the diameter of the positioning sleeve (13) is larger than the lower end area of ​​the locking column (14). A vertical thread groove is opened inside the locking column (14) to match the screw rod (12). The control body (15) is circular and is arranged in the upper center area of ​​the locking column (14).

3. A portable circular measuring device for elementary school mathematics teaching according to claim 2, characterized in that: The lower layer of the overlapping block (11) further comprises a protective ring (111), wherein the protective ring (111) is used to insert the rubber disc (113) through the internal assembly cavity (112), and the edge of the rubber disc (113) is further provided with a connecting ring (114) and a small bolt (115), which is locked to the internal area of ​​the protective ring (111) through the small bolt (115) and the connecting ring (114); The assembly cavity (112) of the protection ring (111) is in a concave shape to allow the rubber disc (113) to be embedded, and a total of four small bolts (115) are provided on the edge of the rubber disc (113).

4. A portable circular measuring device for elementary school mathematics teaching according to claim 1, characterized in that: The edge positioning body (5) is provided with a parallel block (52), the upper center of the parallel block (52) is connected to a pull block (51) and the lower center also includes a solid rod (53), the lower end of the solid rod (53) is connected to a parallel pulley (54) and the lower end of the parallel pulley (54) is fixed with a measuring block (55); The pulling block (51) and the parallel block (52) are perpendicular to each other, and the solid rod (53) at the lower end of the parallel block (52) restrains the center of the parallel pulley (54), and the measuring block (55) is in a triangular trapezoidal shape.

5. A portable circular measuring device for elementary school mathematics teaching according to claim 4, characterized in that: The parallel block (52) is provided with a penetration layer (521), the center of the lower end of the penetration layer (521) is connected to the center of the jacket (522), the jacket (522) is arranged in the central inner area of ​​the fixed block (523), and the fixed block (523) also includes positioning rods (524) on the left and right sides, and the anti-deflection blocks (525) are fixed to the lower ends of the left and right sides of the fixed block (523) through the positioning rods (524); The shape of the penetration layer (521) matches that of the pull block (51), and the jacket (522) is set in a vertical orientation. The positioning rods (524) on the left and right sides of the fixed block (523) each carry a solid anti-deflection block (525).

6. A portable circular measuring device for elementary school mathematics teaching according to claim 1, characterized in that: The center positioning body (1) is arranged in the middle of the center block (2), and the straight column (3) is in the shape of an independent rectangular parallelepiped, and the lower end dimension layer (4) is set in a plane orientation. A slide rail is also provided between the straight column (3) and the edge positioning body (5), and the number of the edge positioning bodies (5) is the same as the number of the straight columns (3).

7. A portable circular measuring device for elementary school mathematics teaching according to claim 1, characterized in that: The adapting groove (21) is circular in shape and matches the shape of the center positioning body (1). The left and right sides of the block (22) are equipped with flattened contact ends (23) and square slots (24). The left and right edge regions of the slots (24) are also provided with connecting grooves for inserting the splicing module (25).

8. A portable circular measuring device for elementary school mathematics teaching according to claim 1, characterized in that: The adsorption sheet (251) covers the surface of the protrusion (252). The protrusion (252) is provided with two pieces and is connected as a whole via a "concave"-shaped restraining block (253). The protrusion (252) can be inserted into the slot (24) in parallel via the restraining block (253), and the center of the straight column (3) can be inserted and aligned via the restraining block (253).

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