CN213007282U

CN213007282U - Measuring tool for mathematical education

Info

Publication number: CN213007282U
Application number: CN202020829348.2U
Authority: CN
Inventors: 汪丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-04-20
Anticipated expiration: 2030-05-18

Abstract

The utility model provides a measuring tool is used in mathematical education. The measuring tool for mathematical education comprises a main ruler; the fixed shaft is fixedly arranged on the outer wall of one side of the main ruler; the auxiliary ruler is rotatably sleeved on the fixed shaft and is in contact with the main ruler; the limiting block is fixedly arranged at one end of the auxiliary ruler; the fixed block is fixedly arranged on the outer wall of one side of the main ruler; the square sliding rod is slidably mounted on the fixed block; the locking block is fixedly arranged at one end, close to the fixed shaft, of the square sliding rod; the lock groove is formed in the lock block, and one end, far away from the auxiliary ruler, of the limiting block extends into the lock groove. The utility model provides a measuring tool for mathematical education has length and can expand, convenient to use's advantage.

Description

Measuring tool for mathematical education

Technical Field

The utility model relates to a teaching aid technical field especially relates to a measuring tool is used in mathematical education.

Background

The ruler is a teaching tool commonly used by mathematics teachers in primary and secondary schools, straight lines with standard lengths can be slid out of the blackboard through the ruler, the slid-out straight lines can also be measured, and the teaching quality of the mathematics teachers is improved beneficially.

However, the ruler for teaching in the prior art does not have the length extending function, when a math teacher needs to draw a relatively long straight line, a straight line needs to be drawn firstly, then the ruler is aligned to the straight line and is lengthened, the ruler is inconvenient to use, and the extension line and the original straight line are difficult to align, so that the drawing effect is influenced.

Therefore, there is a need to provide a new measuring tool for mathematics teaching to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a measuring tool for mathematical education that length can expand, convenient to use.

For solving the technical problem, the utility model provides a measuring tool for mathematical education includes: a main straightedge; the fixed shaft is fixedly arranged on the outer wall of one side of the main ruler; the auxiliary ruler is rotatably sleeved on the fixed shaft and is in contact with the main ruler; the limiting block is fixedly arranged at one end of the auxiliary ruler; the fixed block is fixedly arranged on the outer wall of one side of the main ruler; the square sliding rod is slidably mounted on the fixed block; the locking block is fixedly arranged at one end, close to the fixed shaft, of the square sliding rod; the lock groove is formed in the lock block, and one end, far away from the auxiliary ruler, of the limiting block extends into the lock groove; the tension spring is movably sleeved on the square sliding rod, one end of the tension spring is fixedly connected with the locking block, and the other end of the tension spring is fixedly connected with the fixing block; the shifting block is fixedly arranged at one end, far away from the locking block, of the square sliding rod; the positioning block is fixedly arranged on the outer wall of one side of the main ruler, and the top of the limiting block is in contact with the positioning block.

Preferably, the auxiliary ruler is close to the outer wall of one side of the main ruler, a cylindrical clamping head is fixedly mounted on the outer wall of one side of the main ruler, a bayonet is formed in the main ruler, and the bayonet is matched with the cylindrical clamping head.

Preferably, the main ruler and the auxiliary ruler are provided with scales.

Preferably, a circular through hole is formed in the outer wall of one side of the auxiliary ruler, the fixing shaft penetrates through the circular through hole and is connected with the inner wall of the circular through hole in a rotating mode, the fixing shaft is far away from a limiting circular plate fixedly connected with one end of the main ruler, and the limiting circular plate is in contact with the auxiliary ruler.

Preferably, a square sliding hole is formed in the outer wall of one side of the fixing block, and the square sliding rod penetrates through the square sliding hole and is in sliding connection with the inner wall of the square sliding hole.

Compared with the prior art, the utility model provides a measuring tool for mathematical education has following beneficial effect:

the utility model provides a measuring tool is used in mathematics teaching through set up vice ruler and corresponding locking mechanical system on main ruler, can utilize vice ruler to come to prolong main ruler when main ruler length is not enough to use, guarantees mathematics teacher's drawing effect, and it is comparatively convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a measuring tool for mathematical education provided by the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a top view of a preferred embodiment of the measuring tool for mathematics teaching provided by the present invention;

fig. 4 is the utility model provides a front view under the state is closed with vice ruler to main ruler of measuring tool for mathematical education.

Reference numbers in the figures: 1. the ruler comprises a main ruler, 2, a fixed shaft, 3, an auxiliary ruler, 4, a limiting block, 5, a fixed block, 6, a square sliding rod, 7, a locking block, 8, a locking groove, 9, a tension spring, 10, a shifting block, 11, a positioning block, 12, a cylindrical chuck, 13 and a bayonet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a measuring tool for mathematics teaching according to the present invention; FIG. 2 is an enlarged view of portion A of FIG. 1; fig. 3 is a top view of a preferred embodiment of the measuring tool for mathematics teaching provided by the present invention; fig. 4 is the utility model provides a front view under the state is closed with vice ruler to main ruler of measuring tool for mathematical education. Measuring tool for mathematical education includes: a main straightedge 1; the fixed shaft 2 is fixedly arranged on the outer wall of one side of the main ruler 1; the auxiliary ruler 3 is rotatably sleeved on the fixed shaft 2, and the auxiliary ruler 3 is in contact with the main ruler 1; the limiting block 4 is fixedly arranged at one end of the secondary ruler 3; the fixing block 5 is fixedly arranged on the outer wall of one side of the main ruler 1; the square sliding rod 6 is arranged on the fixed block 5 in a sliding mode; the locking block 7 is fixedly arranged at one end, close to the fixed shaft 2, of the square sliding rod 6; the locking groove 8 is formed in the locking block 7, and one end, far away from the auxiliary ruler 3, of the limiting block 4 extends into the locking groove 8; the tension spring 9 is movably sleeved on the square sliding rod 6, one end of the tension spring 9 is fixedly connected with the locking block 7, and the other end of the tension spring 9 is fixedly connected with the fixing block 5; the shifting block 10 is fixedly arranged at one end, far away from the locking block 7, of the square sliding rod 6; the positioning block 11 is fixedly arranged on the outer wall of one side of the main ruler 1, and the top of the limiting block 4 is in contact with the positioning block 11.

The auxiliary ruler 3 is close to the outer wall of one side of the main ruler 1, a cylindrical clamping head 12 is fixedly mounted on the outer wall of one side of the main ruler 1, a bayonet 13 is formed in the main ruler 1, and the bayonet 13 is matched with the cylindrical clamping head 12.

Scales are arranged on the main ruler 1 and the auxiliary ruler 3.

Circular through-hole has been seted up on one side outer wall of vice ruler 3, fixed axle 2 runs through circular through-hole and with the inner wall of circular through-hole rotates to be connected, fixed axle 2 keeps away from the spacing plectane of the one end fixedly connected with of main ruler 1, spacing plectane with vice ruler 3 contacts.

A square sliding hole is formed in the outer wall of one side of the fixing block 5, and the square sliding rod 6 penetrates through the square sliding hole and is in sliding connection with the inner wall of the square sliding hole.

The utility model provides a measuring tool for mathematical education's theory of operation as follows:

the bottom opening of the bayonet 13 is slightly smaller than the diameter of the cylindrical chuck 12; and the scales on the auxiliary ruler 3 are provided with calibration points, and the scale values corresponding to the calibration points are connected with the scale values on the main ruler 1.

In an initial state, the auxiliary straight scale 3 is in a retracted state, as shown in fig. 4, in this state, the cylindrical chuck 12 is clamped in the bayonet 13, and it is ensured that the auxiliary straight scale 3 cannot rotate;

when the length of the main ruler 1 is not enough to be used, the auxiliary ruler 3 is slightly pressed downwards with force, the cylindrical chuck 12 is enabled to be disengaged from the bayonet 13, then the poking block 10 is poked in a direction far away from the fixed block 5 by rotating a hand, the poking block 10 drives the square sliding rod 6 to move, the locking block 7 can gradually approach the fixed block 5, the tension spring 9 can be compressed to store elastic potential energy, then the auxiliary ruler 3 is rotated along the pointer, when the limiting block 4 is contacted with the positioning block 11, the top of the auxiliary ruler 3 is aligned with the top of the main ruler 1 at the moment, a dessert at a calibration point is aligned with a scale mark corresponding to the main ruler 1, the limiting block 4 is aligned with the lock groove 8 on the locking block 7, then the poking block 10 is loosened, the locking block 7 can move towards the limiting block 4 under the elasticity of the tension spring 9, finally, the limiting block 4 can be clamped into the lock groove 8, so that the auxiliary ruler 3 is fixed, and the auxiliary ruler 3 has the effect of prolonging the length of, then the device can be used for drawing a long straight line on the blackboard.

the utility model provides a measuring tool is used in mathematical education through set up vice ruler 3 and corresponding locking mechanical system on main ruler 1, can utilize vice ruler 3 to prolong main ruler 1 when main ruler 1 length is not enough to use, and it is comparatively convenient to use.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A measuring tool for mathematical education, comprising:

a main straightedge;

the fixed shaft is fixedly arranged on the outer wall of one side of the main ruler;

the auxiliary ruler is rotatably sleeved on the fixed shaft and is in contact with the main ruler;

the limiting block is fixedly arranged at one end of the auxiliary ruler;

the fixed block is fixedly arranged on the outer wall of one side of the main ruler;

the square sliding rod is slidably mounted on the fixed block;

the locking block is fixedly arranged at one end, close to the fixed shaft, of the square sliding rod;

the lock groove is formed in the lock block, and one end, far away from the auxiliary ruler, of the limiting block extends into the lock groove;

the tension spring is movably sleeved on the square sliding rod, one end of the tension spring is fixedly connected with the locking block, and the other end of the tension spring is fixedly connected with the fixing block;

the shifting block is fixedly arranged at one end, far away from the locking block, of the square sliding rod;

the positioning block is fixedly arranged on the outer wall of one side of the main ruler, and the top of the limiting block is in contact with the positioning block.

2. The measuring tool for the mathematics teaching as claimed in claim 1, wherein a cylindrical clamping head is fixedly installed on the outer wall of one side of the auxiliary ruler close to the main ruler, a bayonet is arranged on the main ruler, and the bayonet is matched with the cylindrical clamping head.

3. The measuring tool for mathematics teaching as claimed in claim 1, wherein scales are provided on both said primary and secondary straightedges.

4. The measuring tool for the mathematical education as claimed in claim 1, wherein a circular through hole is formed in an outer wall of one side of the auxiliary ruler, the fixing shaft penetrates through the circular through hole and is rotatably connected with an inner wall of the circular through hole, a limiting circular plate is fixedly connected to one end, away from the main ruler, of the fixing shaft, and the limiting circular plate is in contact with the auxiliary ruler.

5. The measuring tool for the mathematical education as set forth in claim 1, wherein a square slide hole is opened on an outer wall of one side of the fixing block, and the square slide bar penetrates through the square slide hole and is slidably connected with an inner wall of the square slide hole.