CN203511080U

CN203511080U - Portable teaching aid used for drawing angle on blackboard accurately

Info

Publication number: CN203511080U
Application number: CN201320696379.5U
Authority: CN
Inventors: 刘迪
Original assignee: Harbin Finance University
Current assignee: Harbin Finance University
Priority date: 2013-11-06
Filing date: 2013-11-06
Publication date: 2014-04-02
Anticipated expiration: 2023-11-06

Abstract

A portable teaching aid capable of accurately drawing corners on a blackboard relates to a teaching aid, in particular to a portable teaching aid capable of accurately drawing corners on a blackboard. The utility model aims to solve the problems that the existing teaching aids cannot accurately draw angles and figures of arbitrary angles, and are inconvenient to use and carry. The utility model comprises a main scale body, a slider, a semicircle plate, an angle ruler assembly and a first rotating shaft. A chute is provided in the middle extension direction of the upper surface of the main scale body, and the slide block is installed in the chute, and the slide block can It moves in a straight line in the chute, and the half-circle plate is fixedly installed on the slider. An angle value is marked on the top, and one end of the angle ruler is installed on the slide block through the first rotating shaft, and the first rotating shaft is located at the center of the straight side of the semicircle. The utility model is used in teaching.

Description

A kind ofly can on blackboard, accurately draw the portable teaching aid at angle

Technical field

The utility model relates to a kind of teaching aid, is specifically related to a kind ofly can on blackboard, accurately draw the portable teaching aid at angle.

Background technology

In several teaching, teacher need to draw the figure with various angles on the blackboard of being everlasting, and student can be thought deeply intuitively by figure, and whether angle accurately directly affects the degree of accuracy of figure, and then affect the visual perception of student to figure.At present, when teacher draws angle on blackboard, be generally by set square or protractor, set square can only draw several fixing angles, as 90 degree angles, sextant, protractor needs to be used in conjunction with ruler, and need to be with protractor and ruler are fixed on blackboard always simultaneously while drawing angle, another hand is drawn angle, very inconvenient.

Utility model content

The utility model can not accurately draw angle and figure at any angle for solving existing teaching aid, and uses and carry inconvenient problem, and then proposes a kind ofly can on blackboard, accurately draw the portable teaching aid at angle.

The utility model is to address the above problem the technical scheme of taking to be: the utility model comprises main scale body, slide block, semi-circular plate, bevel protractor assembly and the first rotating shaft, the middle part elongatedness direction of main scale body upper surface is provided with chute, slide block is arranged in chute, and slide block can be in chute traveling priority, semi-circular plate is fixedly mounted on slide block, the plate face of semi-circular plate is parallel with the front of main scale body, the straight flange of semi-circular plate is parallel with main scale body extension degree direction center line, the arc-shaped edges of semi-circular plate is marked with angle value, one end of bevel protractor is arranged on slide block by the first rotating shaft, and the first rotating shaft is positioned at the center of semicircle straight flange.

The beneficial effects of the utility model are: the utility model is by being fixed on main scale body on blackboard, make teacher need not use specially fixing main scale body of a pushing time, when having improved the picture degree of accuracy, alleviated teacher's labour intensity, teacher rotates to bevel protractor assembly the angle value place of demarcating on semi-circular plate as required centered by the first rotating shaft, then along main scale body and the setting-out respectively of bevel protractor assembly, can draw required angle, the utility model can accurately draw angle and figure at any angle on blackboard, after finishing using, just fixedly ruler plate 1-2 folds up to dwindle length of the present utility model with prolongation ruler plate 1-3, and then reach and reduce to take up an area space, object easy to carry.

Accompanying drawing explanation

Fig. 1 is the front view in the utility model front, and Fig. 2 is the left view of Fig. 1, and Fig. 3 is the structural representation after the utility model folds.

The specific embodiment

The specific embodiment one: in conjunction with Fig. 1, Fig. 2 and Fig. 3 illustrate present embodiment, described in present embodiment, a kind of portable teaching aid that can accurately draw angle on blackboard comprises main scale body 1, slide block 2, semi-circular plate 3, bevel protractor assembly 4 and the first rotating shaft 5, the middle part elongatedness direction of main scale body 1 upper surface is provided with chute 1-1, slide block 2 is arranged in chute 1-1, and slide block 2 can be in chute 1-1 traveling priority, semi-circular plate 3 is fixedly mounted on slide block 2, the plate face of semi-circular plate 3 is parallel with the front of main scale body 1, the straight flange of semi-circular plate 3 is parallel with main scale body 1 elongatedness direction center line, the arc-shaped edges of semi-circular plate 3 is marked with angle value, one end of bevel protractor 4 is arranged on slide block 2 by the first rotating shaft 5, and the first rotating shaft 5 is positioned at the center of semicircle 3 straight flanges.

The specific embodiment two: present embodiment is described in conjunction with Fig. 1, Fig. 2 and Fig. 3, described in present embodiment, a kind of main scale body 1 that can accurately draw the portable teaching aid at angle on blackboard comprises fixedly ruler plate 1-2, prolongation ruler plate 1-3 and hinge 1-4, and fixedly one end of ruler plate 1-2 is connected by hinge 1-4 with the one end that extends ruler plate 1-3.

The technique effect of present embodiment is: so arrange, by fixing ruler plate 1-2 with extend ruler plate 1-3 and fold up and can dwindle length of the present utility model, the utility model is easy to carry.Other composition and annexation are identical with the specific embodiment one.

The specific embodiment three: present embodiment is described in conjunction with Fig. 1, Fig. 2 and Fig. 3, described in present embodiment, a kind of bevel protractor assembly 4 that can accurately draw the portable teaching aid at angle on blackboard comprises bevel protractor main scale plate 4-1, bevel protractor extending ruler plate 4-2 and the second rotating shaft 4-3, and one end of one end of bevel protractor main scale plate 4-1 and bevel protractor extending ruler plate 4-2 is rotationally connected by the second rotating shaft 4-3.Other composition and annexation are identical with the specific embodiment one.

The specific embodiment four: present embodiment is described in conjunction with Fig. 1, Fig. 2 and Fig. 3, described in present embodiment, the back side of a kind of fixedly ruler plate 1-2 of the portable teaching aid that can accurately draw angle on blackboard is laid with a plurality of suckers 6, and the back side that extends ruler plate 1-3 is laid with a plurality of suckers 6.

The technique effect of present embodiment is: so arrange, make fixedly ruler plate 1-2 can be fixed on blackboard with prolongation ruler plate 1-3, make teacher need not use specially fixing ruler of a pushing time, when having improved the picture degree of accuracy, alleviated teacher's labour intensity.Other composition and annexation are identical with the specific embodiment one, two or three.

Claims

1. A portable teaching aid that can accurately draw corners on a blackboard, characterized in that: said portable teaching aid that can accurately draw corners on a blackboard includes a main ruler (1), a slider (2), a semicircular board ( 3), the angle ruler assembly (4) and the first rotating shaft (5), the middle extension direction of the upper surface of the main ruler body (1) is provided with a chute (1-1), and the slider (2) is installed in the chute ( 1-1), and the slider (2) can move linearly in the chute (1-1), the semi-circular plate (3) is fixedly installed on the slider (2), the surface of the semi-circular plate (3) and the main The front of the ruler body (1) is parallel, the straight side of the semicircle plate (3) is parallel to the central line of the extension direction of the main ruler body (1), the angle value is marked on the arc edge of the semicircle plate (3), and the angle ruler (4 ) is installed on the slider (2) through the first rotating shaft (5), and the first rotating shaft (5) is located at the center of the straight side of the semicircle (3).

2. A portable teaching aid capable of accurately drawing corners on a blackboard according to claim 1, characterized in that: the main ruler body (1) includes a fixed ruler board (1-2), an extended ruler board (1-3 ) and hinge (1-4), one end of the fixed ruler plate (1-2) is connected with an end of the extended ruler plate (1-3) by the hinge (1-4).

3. A portable teaching aid capable of accurately drawing angles on a blackboard according to claim 1, characterized in that: the angle ruler assembly (4) includes the angle ruler main ruler board (4-1), the angle ruler extension ruler board (4 -2) and the second rotating shaft (4-3), one end of the main ruler plate (4-1) of the angle ruler and one end of the extension ruler plate (4-2) of the angle ruler are connected by rotation through the second rotating shaft (4-3).

4. A portable teaching aid capable of accurately drawing corners on a blackboard according to claim 1, 2 or 3, characterized in that a plurality of suction cups (6) are evenly distributed on the back of the fixed ruler board (1-2), A plurality of suction cups (6) are evenly distributed on the back side of the extension ruler board (1-3).