Mathematics teaching aid with angle measuring mechanism

Abstract

The utility model relates to the technical field of math teaching aids, and discloses a math teaching aid with an angle measuring mechanism, which comprises a teaching aid structure, an observation hole A is arranged at the middle end of an inverted T-shaped circular groove and on the outer surface of a positioning circular block in a penetrating manner, an observation hole B is arranged at the middle end of an inverted T-shaped circular rotating rod in a penetrating manner, and the positioning circular block is aligned with the central point position of a geometric diagram. Whether the positioning circular block is at the central point position is observed through the observation hole B and the observation hole A, the angle of the geometric diagram is detected by using the arc-shaped strip and the angle measuring scale, and after the side end of the rotating ruler is aligned with the angle line of the geometric diagram, the position of the rotating ruler on the outer side of the arc-shaped strip can be observed, and angle detection of the geometric diagram is completed. When the size of the geometric diagram is larger than that of the angle measuring component, the movable ruler is dragged to move towards the side away from the positioning component, one side of the movable ruler is aligned with the angle line, the position of the rotating ruler on the outer side of the arc-shaped strip can be observed, and angle detection of the geometric diagram is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of mathematics teaching aids, in particular to a mathematics teaching aid with an angle measuring mechanism. Background Art

[0002] Mathematical teaching aids are tools and materials that help students understand and master mathematical concepts. In the process of teaching geometry, teaching aids such as rulers are often used to help students learn concepts such as measurement, geometry, and mathematics.

[0003] For example, a mathematical teaching aid with an angle measuring mechanism, filed under application number CN220742571U, includes a ruler, an angle measuring assembly, an auxiliary assembly, and a connecting assembly. The angle measuring assembly is disposed on the inner side of the ruler, the auxiliary assembly is disposed on the outer side of the ruler, and the connecting assembly is disposed between the two assemblies and below the ruler. The angle measuring assembly includes a scale line and a fixing plate, the scale line being disposed on the top of the ruler, and the fixing plate being fixedly mounted on the inner side of the ruler. The ruler is first placed on a geometric diagram on a blackboard, and then the angle measuring assembly is manually rotated to measure the angle on the geometric diagram. This simultaneously drives the auxiliary assembly to rotate on the outer side of the ruler and, in conjunction with the connecting assembly, secures the angle measuring assembly. This improves measurement stability, further enhances the efficiency of measuring the angles of geometric diagrams on the blackboard, increases the practicality of the device, and facilitates practical application and operation.

[0004] The above patent proposes that a circular ruler is attached to a geometric diagram on a blackboard, and the angles on the geometric diagram are measured using an angle measuring component. However, in actual use, the circular ruler occupies a large area, and a fixed plate and an angle mark are provided at the center of the circular ruler. As a result, when the lecturer is looking for the center point of the geometric diagram, the fixed plate and the angle mark cover the center point, affecting the positioning of the center position of the circular ruler. As a result, the data obtained by the circular ruler from measuring the angles of the geometric diagram is prone to errors, making it inconvenient to use.

[0005] Therefore, we propose a mathematical teaching aid with an angle measuring mechanism to solve the above problems. Summary of the Invention

[0006] The purpose of the utility model is to provide a mathematical teaching aid with an angle measuring mechanism to solve the problem in the background art that the fixing plate and the angle mark cover the center point position, thereby affecting the positioning of the center position of the circular ruler.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a mathematical teaching aid with an angle measuring mechanism, comprising a teaching aid structure, wherein the teaching aid structure includes a central member and an angle measuring member mounted on the outside of the central member, a positioning member mounted on one side of the middle end of the central member, a distance measuring member mounted on the outside of the positioning member, a distance expanding member slidably mounted inside the distance measuring member, and a locking member mounted on the outside of the distance measuring member;

[0008] The central component includes a positioning circular block and an inverted T-shaped circular groove provided on one side of the middle end of the positioning circular block, and an observation hole A is provided through the middle end of the inverted T-shaped circular groove and on the outer surface of the positioning circular block;

[0009] The angle measuring member includes a measuring bar A and a measuring bar B installed on the outside of the positioning circular block, an arc bar is installed between the measuring bar A and the measuring bar B, and the outer surface of the arc bar is provided with angle measuring marks;

[0010] The positioning member includes an inverted T-shaped circular rotating rod movably mounted inside the inverted T-shaped circular groove, and an observation hole B is opened through the middle end of the inverted T-shaped circular rotating rod;

[0011] The distance measuring component comprises a rotating ruler installed on the outside of an inverted T-shaped circular rotating rod.

[0012] Preferably, a positioning hole is provided on the outer surface of the positioning circular block and outside the inverted T-shaped circular groove, an external connecting bar is installed on the outside of the inverted T-shaped circular rotating rod and at the opposite position of the rotating ruler, and a threaded hole is provided through the middle end of the external connecting bar.

[0013] Preferably, the internal thread of the threaded hole is connected with a bolt, one end of the bolt is installed with a pointed rod, the pointed rod is inserted into the interior of the positioning hole, and a rubber ring is provided inside the positioning hole.

[0014] Preferably, the distance-expanding component comprises a movable ruler, and scale numbers are provided on the outer surfaces of the movable ruler and the rotating ruler.

[0015] Preferably, an inner displacement groove is provided inside the rotating ruler, a limit plate is installed on one side of the inner displacement groove, a positioning hole A is provided through the middle end of the rotating ruler, a limit strip is installed on the outer side of one end of the movable ruler, the limit strip is slidably installed inside the inner displacement groove, and a positioning hole B is provided through the middle end of the movable ruler.

[0016] Preferably, the locking member includes an L-shaped clip and a pin installed at the upper end of the inner side of the L-shaped clip.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention provides a mathematical teaching aid with an angle measuring mechanism. The positioning circle is aligned with the center point of a geometric figure. The positioning circle is observed through observation holes B and A to see if it is at the center point. The angle of the geometric figure is detected using an arc bar and an angle measuring scale. After the side end of the rotating ruler is aligned with the angle line of the geometric figure, the position of the rotating ruler outside the arc bar can be observed to complete the angle detection of the geometric figure.

[0019] 2. The present invention provides a mathematical teaching aid with an angle measuring mechanism. When the size of a geometric figure is larger than an angle measuring component, the movable ruler is dragged to the side away from the positioning component, and one side of the movable ruler is aligned with the angle line. The position of the rotating ruler outside the arc bar can be observed to complete the angle detection of the geometric figure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the central component and the angle measuring component of the utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning component and the distance measuring component of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the expansion component and the locking component of the utility model.

[0024] In the figure: 1. Teaching aid structure; 11. Center component; 111. Positioning block; 112. Inverted T-shaped circular groove; 113. Observation hole A; 114. Positioning hole; 115. Rubber ring; 12. Angle measuring component; 121. Measuring bar A; 122. Measuring bar B; 123. Arc bar; 124. Angle measuring number; 13. Positioning component; 131. Inverted T-shaped circular rotating rod; 132. Observation hole B; 13 3. External connecting strip; 134. Threaded hole; 135. Bolt; 136. Tip rod; 14. Distance measuring component; 141. Rotating ruler; 142. Inward displacement groove; 143. Limiting plate; 144. Positioning hole A; 15. Distance expansion component; 151. Moving ruler; 152. Limiting strip; 153. Positioning hole B; 16. Positioning component; 161. L-shaped retaining strip; 162. Pin; 17. Scale number. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figure 1-Figure 3A mathematical teaching aid with an angle measuring mechanism includes a teaching aid structure 1, which includes a central component 11 and an angle measuring component 12 installed on the outside of the central component 11, a positioning component 13 is installed on one side of the middle end of the central component 11, a distance measuring component 14 is installed on the outside of the positioning component 13, a distance expanding component 15 is slidably installed inside the distance measuring component 14, and a locking component 16 is installed on the outside of the distance measuring component 14.

[0027] The central component 11 includes a positioning circular block 111 and an inverted T-shaped circular groove 112 provided on one side of the middle end of the positioning circular block 111 . An observation hole A113 is provided through the middle end of the inverted T-shaped circular groove 112 and on the outer surface of the positioning circular block 111 .

[0028] The angle measuring member 12 includes a measuring bar A121 and a measuring bar B122 mounted on the outside of the positioning block 111. An arcuate bar 123 is mounted between the measuring bars A121 and B122. An angle measuring mark 124 is formed on the outer surface of the arcuate bar 123. The two sides of the measuring bars A121 and B122 that are close to each other are 90 degrees apart.

[0029] The positioning member 13 includes an inverted T-shaped circular rotating rod 131 movably installed inside the inverted T-shaped circular groove 112. An observation hole B132 is opened through the middle end of the inverted T-shaped circular rotating rod 131. The observation hole B132 is aligned with the observation hole A113 to facilitate observation of the center point position of the geometric diagram.

[0030] The distance measuring member 14 includes a rotating ruler 141 installed on the outside of the inverted T-shaped circular rotating rod 131 , and one side of the rotating ruler 141 contacts the outer surface of the positioning circular block 111 .

[0031] A positioning hole 114 is provided on the outer surface of the positioning circular block 111 and on the outer side of the inverted T-shaped circular groove 112. An external connecting bar 133 is installed on the outer side of the inverted T-shaped circular rotating rod 131 and at the opposite position of the rotating ruler 141. A threaded hole 134 is provided through the middle end of the external connecting bar 133, and the threaded hole 134 is aligned with the positioning hole 114.

[0032] The internal thread of the threaded hole 134 is connected to a bolt 135, and a pointed rod 136 is installed at one end of the bolt 135. The pointed rod 136 is inserted into the interior of the positioning hole 114, and a rubber ring 115 is provided inside the positioning hole 114. The bolt 135 and the pointed rod 136 are used to fix the position between the positioning component 13 and the central component 11.

[0033] In this embodiment: the positioning circular block 111 is aligned with the center point of the geometric figure, and the positioning circular block 111 is observed through the observation hole B132 and the observation hole A113 to see whether it is at the center point. The angle of the geometric figure is detected using the arc strip 123 and the angle measuring scale 124. When the size of the geometric figure is smaller than the angle measuring member 12, the bolt 135 can be rotated in the opposite direction, and the pointed rod 136 can be withdrawn from the inside of the positioning hole 114. At this time, the positioning member 13 and the distance measuring member 14 can be rotated, and one end of the rotating ruler 141 is on the side of the arc strip 123 provided with the angle measuring scale 124. After the side end of the rotating ruler 141 is aligned with the angle line of the geometric figure, the position of the rotating ruler 141 outside the arc strip 123 can be observed to complete the angle detection of the geometric figure.

[0034] Example 2: This example is an improvement based on Example 1. For details, please refer to Figure 2-Figure 4 The distance expansion component 15 includes a movable ruler 151. The outer surfaces of the movable ruler 151 and the rotating ruler 141 are provided with scale numbers 17. The scale numbers 17 on the surfaces of the rotating ruler 141 and the movable ruler 151 can be used to measure distance.

[0035] An inward displacement groove 142 is provided inside the rotating ruler 141, and a limit plate 143 is installed on one side of the inner side of the inward displacement groove 142. A positioning hole A144 is provided through the middle end of the rotating ruler 141, and a limit strip 152 is installed on the outer side of one end of the movable ruler 151. The limit strip 152 is slidably installed inside the inward displacement groove 142. A positioning hole B153 is provided through the middle end of the movable ruler 151, and the position of the positioning hole B153 is consistent with that of the positioning hole A144.

[0036] The locking member 16 includes an L-shaped locking strip 161 and a pin 162 installed at the inner upper end of the L-shaped locking strip 161. The pin 162 is inserted into the locking hole B153 and the locking hole A144 to fix the position between the movable ruler 151 and the rotating ruler 141.

[0037] In this embodiment, when the size of the geometric figure is larger than the angle measuring member 12, the L-shaped clamping strip 161 can be held by hand, and the pin 162 can be pulled out from the inside of the clamping hole B153 and the clamping hole A144, and the movable ruler 151 can be dragged to the side away from the positioning member 13. The limiting strip 152 moves inside the inner displacement groove 142. After the clamping hole B153 is aligned with the clamping hole A144, the pin 162 is inserted into the inside of the clamping hole A144 and the clamping hole B153 to fix the position between the rotating ruler 141 and the movable ruler 151. As the positioning member 13 rotates, one side of the movable ruler 151 is aligned with the angle line. After alignment, the position of the rotating ruler 141 outside the arc strip 123 can be observed to complete the angle detection of the geometric figure. When the teaching aid structure 1 needs to draw a straight line, the positioning member 13 can be rotated, and the distance measuring member 14 and the distance expanding member 15 can be rotated out of the range of the angle measuring member 12. The bolt 135 rotates inside the threaded hole 134, and the tip rod 136 is inserted into the inside of the positioning hole 114. The rubber ring 115 is squeezed by the positioning hole 114 and deformed, so as to avoid the position of the positioning member 13 from shaking after repeated use of the teaching aid structure 1. The position of the rotating ruler 141 and the movable ruler 151 are adjusted according to the length of the drawn straight line.

[0038] Working principle: The positioning circle 111 is aligned with the center point of the geometric figure, and the positioning circle 111 is observed through the observation hole B132 and the observation hole A113 to see if it is at the center point. The arc bar 123 and the angle measuring number 124 are used to detect the angle of the geometric figure. The distance measuring component 14 and the distance expanding component 15 are rotated out of the range of the angle measuring component 12, and the teaching aid structure 1 can draw a straight line.

[0039] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mathematical teaching aid with an angle measuring mechanism, comprising a teaching aid structure (1), characterized in that: The teaching aid structure (1) comprises a central component (11) and an angle measuring component (12) mounted on the outside of the central component (11); a positioning component (13) is mounted on one side of the middle end of the central component (11); a distance measuring component (14) is mounted on the outside of the positioning component (13); a distance expanding component (15) is slidably mounted inside the distance measuring component (14); and a positioning component (16) is mounted on the outside of the distance measuring component (14); The central component (11) includes a positioning circular block (111) and an inverted T-shaped circular groove (112) provided on one side of the middle end of the positioning circular block (111); an observation hole A (113) is provided through the middle end of the inverted T-shaped circular groove (112) and on the outer surface of the positioning circular block (111); The angle measuring member (12) comprises a measuring bar A (121) and a measuring bar B (122) mounted on the outside of the positioning circular block (111), an arcuate bar (123) is mounted between the measuring bar A (121) and the measuring bar B (122), and an angle measuring mark (124) is provided on the outer surface of the arcuate bar (123); The positioning member (13) comprises an inverted T-shaped circular rotating rod (131) movably mounted inside the inverted T-shaped circular groove (112), and an observation hole B (132) is formed through the middle end of the inverted T-shaped circular rotating rod (131); The distance measuring component (14) comprises a rotating ruler (141) mounted on the outside of an inverted T-shaped circular rotating rod (131).

2. A mathematical teaching aid with an angle measuring mechanism according to claim 1, characterized in that: A positioning hole (114) is provided on the outer surface of the positioning circular block (111) and on the outer side of the inverted T-shaped circular groove (112). An external connecting bar (133) is installed on the outer side of the inverted T-shaped circular rotating rod (131) and at a position opposite to the rotating ruler (141). A threaded hole (134) is provided through the middle end of the external connecting bar (133).

3. A mathematical teaching aid with an angle measuring mechanism according to claim 2, characterized in that: The internal thread of the threaded hole (134) is connected to a bolt (135), one end of the bolt (135) is installed with a tip rod (136), the tip rod (136) is inserted into the interior of the positioning hole (114), and the interior of the positioning hole (114) is provided with a rubber ring (115).

4. The mathematical teaching aid with an angle measuring mechanism according to claim 2, characterized in that: The distance expansion component (15) comprises a movable ruler (151), and outer surfaces of the movable ruler (151) and the rotating ruler (141) are provided with scale numbers (17).

5. The mathematical teaching aid with an angle measuring mechanism according to claim 4, characterized in that: An inner displacement groove (142) is provided inside the rotating ruler (141), a limiting plate (143) is installed on one side of the inner displacement groove (142), a positioning hole A (144) is provided through the middle end of the rotating ruler (141), a limiting strip (152) is installed on the outer side of one end of the movable ruler (151), the limiting strip (152) is slidably installed inside the inner displacement groove (142), and a positioning hole B (153) is provided through the middle end of the movable ruler (151).

6. The mathematical teaching aid with an angle measuring mechanism according to claim 5, characterized in that: The positioning component (16) comprises an L-shaped clamping strip (161) and a pin (162) mounted on the inner upper end of the L-shaped clamping strip (161).

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