CN206141181U - Multi -functional teaching ruler - Google Patents

Abstract

The utility model belongs to the teaching aid field, concretely relates to multi -functional teaching ruler, can draw on the blackboard straight line, parallel lines, circular and oval, measure and draw the angle, realize two kinds of set -squares commonly used conversions through simple dismouting. The qualities of blackboard teaching gives lessons are greatly improved. The utility model discloses a following technical scheme: this multi -functional teaching ruler uses the cavity main scale of ruler shape to be connected and can to take in within the main scale through pivot and main scale as outline, vice chi, there is the spout on the main scale, has the slider of taking ledge for chalk on blackboard and oval focus in the spout, vice chi is connected respectively in the main scale both ends, and wherein one end is equipped with the sucking disc. Two kinds of common set -squares can be constituteed with the main scale after expanding to vice chi, the four -bar linkage who takes calibrated scale and scale plate is equipped with on the vice chi. The ruler shape after multi -functional teaching ruler packs up, accomodate convenient to carry, deployable constitution set -square, the figure of the multiple shape of can drawing up, the function is comprehensive, has high using value.

Description

Multifunctional teaching ruler

Technical field

This utility model belongs to teaching aid field, and in particular to a kind of multifunctional teaching ruler.

Background technology

In traditional traditional instruction, teacher is many times needed to draw on blackboard, this will necessarily just use teaching ruler.But It is teaching ruler single function, and volume ratio is larger, and inconvenient to carry, then various multifunctional teaching rulers arise at the historic moment.Close at present Have much in the patent of invention of multifunctional teaching ruler, but can be basically divided into two big class, i.e., with set square as basic configuration and With compasses as basic configuration.But both have very big defect.Volume with set square as basic configuration all can be very big, no Suitable writing on the blackboard is used；Limited by shape with compasses by basic configuration, functional defect, it is not very convenient to operate.

The content of the invention

To solve above-mentioned technical problem, this utility model provides a kind of multifunctional teaching ruler, and the multifunctional teaching ruler is not Only include and functional beyond the institute of teaching ruler at this stage, and using simple, easy to carry, the daily plate of teacher can be met Book teaching use requirement.

For achieving the above object, this utility model is adopted the following technical scheme that：

Multifunctional teaching ruler, is mainly made up of 1 main scale with 5 secondary chis, main scale be flute profile ruler, secondary chi one, secondary chi four It is connected with main scale by fixed rotating shaft, secondary chi three is connected by another fixed rotating shaft with main scale, secondary chi one and the activity riveting of secondary chi two Connect in succession, secondary chi five forms parallelogram, mutually activity riveting by connecting rod and secondary chi one.

Above-mentioned multifunctional teaching ruler, in the connection main scale and secondary chi one, the rotating shaft of secondary chi four sucker is fixed；Main scale Centre fluting, has slide block to slide along groove, has the other end of ledge for chalk on blackboard and elliptic focus one, groove on slide block and has a fixed position to slide Block is elliptic focus two, and between two slide blocks cotton rope is connected with.

Above-mentioned multifunctional teaching ruler, on the main scale location hole is opened；Secondary chi two, secondary chi three, secondary chi four are connected by connection button Connect, the connection button is removable；Secondary chi two can be connected at location hole by connection button.

Above-mentioned multifunctional teaching ruler, two distance between axles determine with each secondary chi length ratio on the main scale, spacing:Secondary chi one: Secondary chi two:Secondary chi three:Secondary chi four=1:1:0.866:0.548:0.525.

Above-mentioned multifunctional teaching ruler, the main scale edge is provided with main scale graduation mark；Connect secondary chi one, secondary chi four on main scale Graduated disc is provided with around axle sleeve, can be by the total indicator reading synchronous with secondary chi four.

Above-mentioned multifunctional teaching ruler, is provided with the quadric chain of parallelogram shape, parallel to secondary chi in secondary chi one There is hollow out elongated slot in the middle of one secondary chi five, hollow slots both sides are provided with graduation mark.

The beneficial effects of the utility model are：This multifunctional teaching ruler is ruler shape after folding, and is received very convenient；This The institute that chi covers existing teaching ruler is functional, and can draw ellipse, involute, parallel lines, complete function；This multifunction teaching Chi can draw the curves such as circumference with ruler shape, and deployable into two kinds of general set squares, and novel functions are easy to use； Finally, each part of this chi is substantially linear type, is adapted to low-cost, high-volume processing, suitable to promote.

Description of the drawings

Fig. 1 is that multifunctional teaching ruler launches plane graph

Fig. 2 is that multifunctional teaching ruler launches side view

Fig. 3 is that multifunctional teaching ruler receives folded side view

Fig. 4 is that multifunctional teaching ruler receives folded plane graph

Labelling in figure：1st, sucker；2nd, rotating shaft；3rd, graduated disc；4th, pointer；5th, main scale；6th, chute；7th, slide block one；8th, position Hole；9th, cotton rope；10th, main scale graduation mark；11st, slide block two；12nd, main scale panel；14th, secondary chi five；15th, secondary chi one；16th, secondary chi two； 17th, secondary chi four；18th, connection button；19th, secondary chi three；20th, main scale back plate.21st, connecting shaft.

Specific embodiment

For the ease of those skilled in the art's understanding, this utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, 2, with suctorial rotating shaft (1) by rotating shaft (2) by main scale (5) and secondary chi one (15), secondary chi four (17) connect, main scale (5) is connected by rotating shaft with secondary chi three (19), secondary chi one (15), the activity riveting of secondary chi two (16), secondary chi two (16), secondary chi three (19), secondary chi four (17) can be connected by connection button (18), and the connection button (18) can voluntarily be torn open by operator Dress；Main scale panel is provided with chute (6), and slide block one (7) along slide and can be reached by bolt and tighten, and have ledge for chalk on blackboard thereon And elliptic focus one, slide block two (11) is fixed on main scale, and cotton rope (9) is connected between two slide blocks；Secondary chi one (15) and secondary chi five (14) it is the quadric chain of parallelogram.

As shown in Fig. 2 at ordinary times, secondary chi can be accommodated in the cavity that main scale panel (12) is formed with main scale back plate (20), When using, launch on demand.

As shown in figure 1, secondary chi sets up connection button (18) major and minor chi when all launching combine at 45 °, 45 ° of equilateral right angles three Gusset, if on the location hole (8) that secondary chi two (16) is connected on main scale by connection button (18), main scale, secondary chi one (15), secondary chi two (16) is combined into 30 °, 60 ° of right angle triangles.

As shown in figure 1, when individually opening secondary chi four (17), can be by connected pointer (4) thereon on graduated disc (3) Read main scale and the angulation of secondary chi four (17), and then angulation or draw the angle of specified angle.If main scale edge is along a certain Datum line is arbitrarily moved, and can draw arbitrarily angled parallel lines along the edge of secondary chi four (17).

As shown in figure 3, teaching ruler is used as the center of circle by sucker (1) absorption on blackboard, rotating teaching ruler can pass through powder Drawing with coloured chalk circle in groove, its radius can be read by ledge for chalk on blackboard alignment main scale graduation mark (10).

As shown in figure 4, being have cotton rope (9) in bifocal with two slide blocks as elliptic focus, it is with cotton rope (9) with chalk Restriction draws ellipse.When secondary chi is all packed up, straight line can be drawn along main scale edge, line segment length can be by main scale graduation mark (10) Scale read.

Above description is merely to illustrate the technical solution of the utility model rather than a limitation, and art personnel are according to upper State bright done modification or equivalent is carried out to some technical characteristics, it should belong to the technology that this utility model is claimed In aspects.

Claims (6)

1. multifunctional teaching ruler, it is characterised in that：Main scale is made up of main scale panel (12) and main scale back plate (20), forms flute profile straight Chi, its cross section is spill, and main scale is connected to rotating shaft (2) with secondary chi one (15), secondary chi four (17), and main scale is used with secondary chi three (19) Connecting shaft (21) connects, and secondary chi one (15) is riveted with the activity of secondary chi two (16).

2. by multifunctional teaching ruler described in claim 1, it is characterised in that：One end of rotating shaft (2) is fixed with sucker (1), main scale Centre fluting, slide block one (7) can slide along groove, have one end of ledge for chalk on blackboard and elliptic focus, groove on slide block one (7) and have a band oval The slide block two (11) of focus, is connected with cotton rope (9) between two slide blocks.

3. by multifunctional teaching ruler described in claim 1, it is characterised in that：There is location hole (8) on main scale；Secondary chi two (16), pair Chi three (19), secondary chi four (17) may connect to connection button (18), and connection button is removable connection, and secondary chi two (16) can be by connection Button (18) is connected to location hole (8) place.

4. by multifunctional teaching ruler described in claim 3, it is characterised in that：On main scale rotating shaft (2) and connecting shaft (21) spacing with The determination of secondary chi length ratio, spacing:Secondary chi one (15):Secondary chi two (16):Secondary chi three (19):Secondary chi four (17)=1:1:0.866: 0.548:0.525。

5. by multifunctional teaching ruler described in claim 3, it is characterised in that：Main scale edge is provided with main scale graduation mark (10)；Main scale On graduated disc (3) can be by pointer (4) reading synchronous with secondary chi four (17).

6. by multifunctional teaching ruler described in claim 1, it is characterised in that：Secondary chi one (15) is provided with graduated disc；Secondary chi one (15) quadric chain of parallelogram shape is constituted with secondary chi five (14), the hollow slots both sides of secondary chi five (14) are provided with scale Line.