CN210190964U

CN210190964U - Auxiliary device for primary school mathematical education

Info

Publication number: CN210190964U
Application number: CN201920464449.1U
Authority: CN
Inventors: Yi Zhou; 周易; Qunchang Deng; 邓群昌
Original assignee: Yilong County Xincheng School
Current assignee: Yilong County Xincheng School
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-03-27
Anticipated expiration: 2029-04-08

Abstract

The utility model discloses an auxiliary device for primary school's mathematical education, including the main scale, the length direction border of main scale is equipped with the graduation apparatus, main scale one end is equipped with the circle calibrated scale, the circle calibrated scale back is equipped with the loop bar, circle calibrated scale below is equipped with discoid magnet dish, the one side of the relative circle calibrated scale of magnet dish is equipped with the sleeve, loop bar and sleeve cup joint, the sleeve rotates with the main scale to be connected, set up the spout along length direction on the main scale, it is equipped with the slider to slide in the spout, the chalk trepanning has been seted up on the slider, the upper surface of slider is equipped with the length pointer, be equipped with locking device on the side of slider, the auxiliary groove has been seted up on the side that corresponds locking device on the main scale, locking device and auxiliary groove sliding connection, the main scale upper surface is equipped with the circumference pointer. Primary school is auxiliary device for mathematical education have that the teaching aid is with low costs, convenient to carry, use advantage such as light.

Description

Auxiliary device for primary school mathematical education

Technical Field

The utility model relates to a teaching technical field particularly, relates to an auxiliary device for primary school's mathematical education.

Background

In primary school's mathematical education in-process, often need show triangle-shaped and quadrangle for the student, need often measure length and angle simultaneously again, still need draw the circle on the blackboard sometimes, the geometry teaching aid of primary school is all more single on the existing market, can not solve multiple figure teaching demonstration and drawing problem with same kind of teaching aid, in the teaching process, traditional special compasses of teacher are inconvenient to draw the circle on the blackboard, the teacher often carries multiple instrument, will produce more expense, and carry inconvenient very big inconvenience of having brought for work, the device structure that combines several kinds of drawing teaching aids together is complicated a bit, it is harder to use.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides an auxiliary device is used in primary school's mathematical education has advantages such as teaching aid is with low costs, convenient to carry, use are light.

In order to achieve the above object, the utility model adopts the following technical scheme: an auxiliary device for primary school mathematics teaching comprises a main scale, wherein a dial gauge is arranged on the edge of the main scale in the length direction, a round dial is arranged at one end of the main ruler, a loop bar is arranged on the back of the round dial, a disc-shaped magnet disc is arranged below the round dial, one surface of the magnet disc, which is opposite to the circular dial, is provided with a sleeve, the loop bar is sleeved with the sleeve, the sleeve is rotationally connected with the main scale, the main ruler is provided with a sliding groove along the length direction, a sliding block is arranged in the sliding groove in a sliding manner, the sliding block is provided with a chalk sleeve hole, the upper surface of the sliding block is provided with a length pointer, the side surface of the sliding block is provided with a locking device, the side surface of the main ruler corresponding to the locking device is provided with an auxiliary groove, the locking device is connected with the auxiliary groove in a sliding mode, a circumference indicator is arranged on the upper surface of the main scale, and the circumference indicator is arranged on one side of the circular dial.

In the structure, when a straight line needs to be drawn or the length needs to be measured, the sleeve rod and the sleeve are separated, and the magnet disc and the circular dial are taken down, so that the straight line can be drawn or the length can be measured through the dial gauge side; when the angle needs to be measured, the magnet disc and the circular dial are arranged on the main scale through the sleeve connection of the sleeve rod and the sleeve, firstly, the circle center is selected on the blackboard, the magnet disc is adsorbed at the corresponding circle center position on the blackboard, the circular dial is calibrated to zero, the circumference pointer points to 0 degree on the circular dial, the circle center of the chalk sleeve hole is coincided with one straight line of the measured angle, the main scale is rotated, the circle center of the chalk sleeve hole is coincided with the other straight line of the measured angle, and the degree corresponding to the circumference pointer is the angle value; when a circle needs to be drawn, the chalk is arranged in the chalk sleeve hole, the locking device is loosened, the sliding block moves in the sliding groove, meanwhile, the locking device also moves along the auxiliary groove, the sliding block moves to different length positions according to the size of the circle needing to be drawn, the radius of the circle is obtained according to the length distance corresponding to the length pointer, the locking device is tightened, the main ruler rotates around the magnet disc, and the chalk can draw the circle; the device has simple integral structure, convenient carrying, light weight and easy drawing.

Preferably, the locking device comprises a nut rod and a locking nut, the sliding block is of an inverted-convex structure, the nut rod is arranged on the side face of the lower end of the sliding block, the locking nut is in threaded connection with the nut rod, so that the locking nut can be adjusted to position, lock and loosen the sliding block, and meanwhile, the nut rod plays a certain limiting role.

Preferably, the length pointer is positioned at one end, close to the dial gauge, of the upper surface of the sliding block and aligned with the circle center of the chalk sleeve hole, and the length pointer is parallel to scale marks on the dial gauge and is arranged in such a way that length measurement alignment is convenient to carry out.

Preferably, keep away from circle calibrated scale one end on the main scale and be equipped with LED lamp and switch, the inside button cell that is equipped with of main scale, button cell's power output end is connected with the power input end of switch, the power output end of switch is connected with the power input end of LED lamp, so set up, the accessible LED lamp improves student's attention at the drawing in-process, improves lecture efficiency.

Preferably, the needle point of the circumference pointer is aligned with the circle center of the chalk sleeve hole, and the setting direction of the circumference pointer is perpendicular to the setting direction of the length pointer.

The utility model has the advantages that:

(1) the utility model realizes the functions of circle drawing and angle measuring of the ruler by the simple matching of the slide block and the rotation center of the magnet disc, reduces the number of teachers' teaching aids, and reduces the education input cost;

(2) the accuracy of drawing the radius of the circle is realized through the matching of the length pointer on the sliding block and the dial gauge;

(3) the circle dial and the magnet disc are matched together to realize the effect of representing the circle center and the angle, so that the use of an additional structure is reduced, the quality of a teaching aid is reduced, the burden of a teacher in the drawing process is reduced, and the drawing efficiency is improved;

(4) through the arrangement of the LED lamp, the classroom attention of students is improved, and the classroom listening efficiency is improved.

Drawings

Fig. 1 is a plan view of embodiment 1 of the present invention;

fig. 2 is a front view of embodiment 1 of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1;

fig. 4 is a schematic structural view of a slider in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of the circular dial and the magnet disc in accordance with embodiment 1 of the present invention;

fig. 6 is a plan view of embodiment 2 of the present invention;

fig. 7 is a front view of embodiment 2 of the present invention.

Description of reference numerals:

1. a main scale; 2. a dial gauge; 3. a circular dial; 4. a slider; 5. a chalk sleeve hole; 6. a locking device; 7. a chute; 8. a nut stem; 9. locking the nut; 10. a loop bar; 11. a sleeve; 12. a magnetic disk; 13. a circumferential degree pointer; 14. an LED lamp; 15. a switch; 16. a button cell; 17. a length pointer; 18. an auxiliary groove.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-5, an auxiliary device for primary school mathematics teaching comprises a main scale 1, wherein a scale 2 is arranged at the edge of the main scale 1 in the length direction, a circular dial 3 is arranged at the left end of the main scale 1, a loop bar 10 is arranged at the back of the circular dial 3, a disc-shaped magnet disc 12 is arranged below the circular dial 3, the circle center of the circular dial 3 is aligned with the whole scale on the scale 2, the circle center of the circular dial 3 of the utility model is aligned with the scale line at 2cm, the circle centers of the magnet disc 12 and the circular dial 3 are positioned on the same straight line, the sleeve 11 and the loop bar 10 are of cylindrical structures, the axes of the sleeve 11 and the loop bar 10 are coincident with the circle center of the circular dial 3, a sleeve 11 is arranged at the side of the magnet disc 12 opposite to the circular dial 3, the loop bar 10 and the sleeve 11 are sleeved, the sleeve 11 is rotatably connected with the main scale 1, a chute 7 along the length, the sliding groove 7 is internally provided with a sliding block 4 in a sliding mode, the sliding block 4 is provided with a chalk sleeve hole 5, the upper surface of the sliding block 4 is provided with a length pointer 17, the length pointer 17 is located at one end, close to the dial gauge 2, of the upper surface of the sliding block 4 and is aligned with the circle center of the chalk sleeve hole 5, the length pointer 17 is parallel to a scale mark on the dial gauge 2, and length measurement alignment is convenient to conduct. The side face of the sliding block 4 is provided with a locking device 6, the locking device 6 comprises a nut rod 8 and a locking nut 9, the sliding block 4 is of an inverted-convex structure, the inverted-convex structure is convenient to match with the sliding groove 7, and meanwhile, the sliding block 4 does not influence straight line drawing or length measurement of the main scale 1. The nut rod 8 is arranged on the side face of the lower end of the sliding block 4, the locking nut 9 is in threaded connection with the nut rod 8, positioning, locking and loosening of the sliding block 4 can be achieved by adjusting the locking nut 9, and meanwhile the nut rod 8 plays a certain limiting role. The utility model discloses a chalk cover hole measuring device, including main scale 1, locking device 6, auxiliary groove 18 has been seted up on the side that corresponds locking device 6 on the main scale 1, locking device 6 and auxiliary groove 18 sliding connection, main scale 1 upper surface is equipped with circumference pointer 13, circumference pointer 13 is located circle dial 3 right side, the needle point of circumference pointer 13 aligns with the centre of a circle of chalk trepanning 5, and the direction that sets up of circumference pointer 13 is perpendicular with length pointer 17's the direction that sets up, conveniently carries out the measurement and the calibration of angle, has improved the measuring degree of accuracy.

In the above structure, when a straight line is required to be drawn or the length is required to be measured, the magnet disc 12 and the circular scale disc 3 are removed by separating the sleeve rod 10 and the sleeve 11, so that the straight line can be drawn or the length can be measured through the dial 2 side; when an angle needs to be measured, the magnet disc 12 and the circular dial 3 are arranged on the main scale 1 through the sleeve connection of the sleeve rod 10 and the sleeve 11, firstly, the center of a circle is selected on the blackboard, the magnet disc 12 is adsorbed at the corresponding center of a circle position on the blackboard, the circular dial 3 is calibrated to zero, the circumference pointer 13 points to 0 degree on the circular dial 3, the center of a circle of the chalk sleeve hole 5 is coincided with one straight line of the measured angle, the main scale 1 is rotated, the center of a circle of the chalk sleeve hole 5 is coincided with the other straight line of the measured angle, and the degree corresponding to the circumference pointer 13 is an angle value; when a circle needs to be drawn, chalk is arranged in the chalk sleeve hole 5, the locking nut 9 is adjusted to be loose, the sliding block 4 moves in the sliding groove 7, meanwhile, the nut rod 8 also moves along the auxiliary groove 18, the sliding block 4 moves to different length positions according to the size of the circle needing to be drawn, the radius of the circle is obtained according to the length distance corresponding to the length pointer 17, the locking nut 9 is adjusted to be tightly pressed against the side surface of the main ruler 1, the main ruler 1 rotates around the magnet disc 12, and the chalk can draw the circle; the device has simple integral structure, convenient carrying, light weight and easy drawing.

Example 2:

as shown in fig. 6 to 7, in this embodiment, on the basis of embodiment 1, the right end of the main scale 1 is provided with an LED lamp 14 and a switch 15, the inside of the main scale 1 is provided with a button battery 16, a power output end of the button battery 16 is connected with a power input end of the switch 15, a power output end of the switch 15 is connected with a power input end of the LED lamp 14, the switch 15 controls the LED lamp 14 to be turned on and off, and the attention of students can be improved through the LED lamp 14 in the process of drawing pictures, so that the lecture efficiency is improved.

Embodiment 2 the rest of the structure and the operation principle are the same as those of embodiment 1.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. An auxiliary device for primary school mathematics teaching, which comprises a main scale and is characterized in that a scale is arranged on the edge of the main scale in the length direction, a round dial is arranged at one end of the main ruler, a loop bar is arranged on the back of the round dial, a disc-shaped magnet disc is arranged below the round dial, one surface of the magnet disc, which is opposite to the circular dial, is provided with a sleeve, the loop bar is sleeved with the sleeve, the sleeve is rotationally connected with the main scale, the main ruler is provided with a sliding groove along the length direction, a sliding block is arranged in the sliding groove in a sliding manner, the sliding block is provided with a chalk sleeve hole, the upper surface of the sliding block is provided with a length pointer, the side surface of the sliding block is provided with a locking device, the side surface of the main ruler corresponding to the locking device is provided with an auxiliary groove, the locking device is connected with the auxiliary groove in a sliding mode, a circumference indicator is arranged on the upper surface of the main scale, and the circumference indicator is arranged on one side of the circular dial.

2. The auxiliary device for primary school mathematics teaching as claimed in claim 1, wherein said locking means comprises a nut rod and a locking nut, said slide block is of an inverted-convex structure, said nut rod is arranged on the side surface of the lower end of the slide block, and said locking nut is connected with the nut rod by screw thread.

3. The auxiliary device for primary school mathematics teaching as claimed in claim 1, wherein said length pointer is located at one end of the upper surface of the sliding block close to the scale and aligned with the center of the chalk sleeve hole, and said length pointer is parallel to the scale marks on the scale.

4. The auxiliary device for primary school mathematics teaching according to claim 1, wherein said main ruler is provided with an LED lamp and a switch at the end far from the circular dial, said main ruler is provided with a button cell inside, the power output end of said button cell is connected with the power input end of the switch, and the power output end of said switch is connected with the power input end of the LED lamp.

5. An auxiliary device for primary school mathematics teaching as claimed in claim 3, wherein the needle point of the circumference pointer is aligned with the center of the chalk sleeve hole, and the arrangement direction of the circumference pointer is perpendicular to the arrangement direction of the length pointer.