CN2179830Y

CN2179830Y - Multi-functional teaching ruler

Info

Publication number: CN2179830Y
Application number: CN 94202577
Authority: CN
Inventors: 张强; 高占东
Original assignee: Individual
Current assignee: Zhang Qiang
Priority date: 1994-01-25
Filing date: 1994-01-25
Publication date: 1994-10-19
Anticipated expiration: 2004-01-25

Abstract

The utility model relates to a multi-functional teaching ruler which is composed of a main ruler, an auxiliary ruler and a fastening device. The auxiliary ruler and the fastening device are arranged on the zero positioning hole of the main ruler. The head end of a main ruler body is labeled with angle measurement graduation of the full circumference, and the upper and the lower parts are respectively labeled with size graduation. Two rows of circular holes are also arranged on the ruler body, and the center of circles of each row of circular holes are respectively corresponding to the odd and even of the size graduation. The multifunctional ruler has the advantages of simple structure, low cost and convenient operation and use. A circle, an angle and a straight line, etc. can be drawn on a blackboard, and the radius, the angle and the length can be directly read without reserving a compass, a protractor, set square, etc. Thus the teaching aid is simplified, and the multi-functional teaching ruler is especially suitable for teaching use.

Description

Multi-functional teaching ruler

The multi-functional ruler of the utility model belongs to educational aid, can be at the blackboard upper drawing circle, draw the angle, draw straight line, and can directly read radius, angle, length.

Prior art, need many instruments such as standby compasses, set square, ruler, protractor in the teaching, and the common compasses of using in the current teaching, manipulate inconvenience, directly influence is drawn and teaching efficiency, be difficult for regulating as compasses shank bolt degree of tightness, it is stable to cause the picture radius of a circle to be difficult for, and P Ka Fenbichu changes weak points such as trouble under the compasses.

Through the domestic Searches of Patent Literature, a kind of multipurpose educational line drawing ruler (patent No. 89209283) is disclosed, many parallel lines that can only on blackboard, draw, picture is round, the picture angle reaches the function that directly reads size and do not have.

The present utility model purpose, in order to overcome the prior art weak point, for teaching provide a kind of simple in structure, cost is low, easy for operation, can draw, draw the angle, draw straight line, and can directly read the multi-functional ruler of radius, angle, length.

The present utility model purpose is realized by following technical scheme.

The multi-functional ruler of teaching usefulness is made of chi body, fastener, and its architectural feature is:

1, the chi body is made up of main scale, secondary chi, and main scale, secondary chi are ruler, and main scale two ends are provided with the zero-point positioning hole, and secondary chi one end is contained in by fastener on the locating hole of main scale head end, and secondary chi is an axle with the fastener on main scale, can be suitable, counter rotation moving.

2, the head end of main scale chi body mark wholecircle week angle measuring calibration, the upper and lower of chi body marks the size scale respectively, the size scale of mark, a side be integer 1,2,3 ... the cm scale, the opposing party is (an integer+5mm) as 1.5,2.5,3.5 ... scale.

3, be provided with upper and lower two row's circular holes between the upper and lower size scale of main scale chi body, it is parallel with the zero-point positioning centerline hole that each arranges the center line of circular hole, the more little then error of spacing B apart from the zero-point positioning centerline hole is more little, and general B is less than 5mm, to guarantee to have enough accuracy.It is corresponding with odd number, the even number of size scale respectively that each arranges the center of circle of each circular hole.But the diameter D plurality of specifications of circular hole should be complementary with the thickness φ of detail pen.

4, fastener is made up of nut end cover, screw, nut knob, pad, and fastener is contained in respectively on the zero-point positioning hole of main scale two ends.On the one hand fastening and adjust the degree of tightness of secondary chi and main scale, when drawing on the other hand, fastener plays the role of positioning to blackboard.

The multi-functional ruler of the utility model, be applicable to that teaching go up to use.Can work as compasses and use the picture circle, can work as set square and use picture angle etc.

If when compasses use,, detail pen (as chalk) is inserted in the corresponding circle hole of main scale according to drawing radius size, again ruler is lain on the blackboard, a hand is pinned the nut end cover of fastener, and the another hand is stirred paintbrush and driven 360 ° of main scale rotations, then just is drawn as needed circle.If radius of a circle when being integer, is then pinned the center of circle anchor point of the fastener of main scale head end for circle, if radius of a circle be that (during integer+5mm), the fastener of then pinning the main scale other end is round center of circle anchor point.

If when drawing the angle, pin the nut end cover of the fastener of main scale head end on the other hand, after the revolute chi places required angle, get final product with the direction setting-out of hand along secondary chi and main scale.

Provide embodiment below in conjunction with accompanying drawing, technical solutions of the utility model are described in further detail.

Fig. 1 imparts knowledge to students with multi-functional ruler structure general assembly drawing for the utility model;

Fig. 2 is the main scale figure of the utility model teaching with multi-functional ruler;

Fig. 3 is the secondary chi figure of the utility model teaching with multi-functional ruler;

Detailed description of main elements:

Main scale (1), secondary chi (2), nut end cover (3), screw (4), nut knob (5), pad (6), zero point, hole (7), (8), wholecircle week angle index (9), main scale top integer scale (10), main scale below (scale (11) of integer+5mm), first a row odd number hole (12), second a parallelism and antithesis number hole (13) were decided in the position.

The multi-functional ruler of the utility model as shown in Figure 1, constitute by chi body, fastener, the chi body is made up of main scale (1), secondary chi (2), main scale (1), secondary chi (2) are ruler, main scale (1) two end is provided with zero-point positioning hole (7), (8), secondary chi (2) is on main scale (1), be installed on the main scale (1) with fastener, rotation nut knob (5) is adjusted the degree of tightness of main scale (1), secondary chi (2), secondary chi (2) is an axle with the screw (4) of fastener, can do 360 ° of suitable, contrary direction rotations.

Main scale (1) as shown in Figure 2, the head end of main scale (1) mark wholecircle week angle measuring calibration (9), the top mark integer scale (10) of chi body, as 1,2,3 ... the cm scale, below mark (scale (11) of integer+5mm), as 1.5,2.5,3.5 ... the cm scale.Between chi body upper and lower size scale (10), (11), be provided with upper and lower two row's circular holes, first row is an odd number hole (12), promptly the home position in a hole is corresponding with the odd number of top size scale, as 1,3,5 ... second row is for an even number hole (13), and promptly the home position in a hole is corresponding with the even number of top size scale, as 2,4,6 ...The center of the center of circle center line of upper and lower two spread pen holes (13), (14) and zero-point positioning hole (7), (8) is parallel, and spacing B is 5mm.The aperture D of hole (13), (14) is 10mm.Draw bowlder, according to radius of a circle be integer cm or (cm of integer+5mm) selects zero-point positioning hole (7) or (8) of the center of circle anchor point of drawn circle on main scale, again the paintbrush hole is inserted with the hole (12) of the corresponding size of radius of circle, (13) on.

Secondary chi (2) is contained in the head end of main scale (1) with fastener as shown in Figure 3, and when drawing the angle, revolute chi (2) is to the respective angles position of wholecircle week angle index (9), with hand along main scale (1) and secondary chi (2) setting-out, the required angle of promptly drawing.Can the draw angle of 80～352 ° of angle [alpha] of present embodiment.

Fastener is made up of nut end cover (3), screw (4), nut knob (5), pad (6) as shown in Figure 1, and two cover fasteners are contained in respectively on the zero-point positioning hole (7), (8) of main scale (1) two end.Screw (4) be ruler when drawing with the positioner of blackboard, the degree of tightness of nut knob (5) adjusting main scale (1), secondary chi (2).

The multi-functional ruler of present embodiment, main scale (1) and secondary chi (2) adopt pmma material to make, and also can adopt material such as wooden, steel to make.Main scale (1) is long to be 660mm, and wide is 45mm, and thick is 3.5mm, and main scale (1) is long more, and picture radius of a circle scope is also big more; Secondary chi (2) is long to be 205mm, and wide is 20mm, and thick is 3mm, and secondary chi (2) is long more, and picture angle [alpha] scope is also big more, is advisable but secondary chi (2) is shorter in length than main scale (1).

The major advantage of the utility model Multifunctional straightedge is:

1, multi-functional, can be at the blackboard upper drawing circle, draw the angle, draw straight line etc., and can directly read angle, radius, length. It has been arranged, do not needed compasses for subsequent use, protractor, set square etc. in the teaching, thereby simplified teaching aid.

2, simple in structure, cost is low, uses easy to operate. As adjust main scale, secondary chi degree of tightness is easy, the revolute chi just can be drawn the angle; Detail pen directly inserts in the hole, leads the rotation of pen drive main scale with hand and just can draw circle, and radius of a circle is stable, and drawing effect is good.

Claims

1, the multi-functional ruler of a kind of teaching is made of chi body, fastener, it is characterized in that:

1) the chi body is made up of main scale, secondary chi, and main scale, secondary chi are ruler, and main scale two ends are provided with the zero-point positioning hole, and secondary chi one end is contained in by fastener on the locating hole of main scale head end, secondary chi on main scale be with the fastener axle, can be suitable, counter rotation moving;

2) head end of main scale chi body mark wholecircle week angle measuring calibration, the upper and lower of chi body marks the size scale respectively;

3) between the upper and lower size scale of main scale chi body, be provided with upper and lower two row's circular holes, the center line in center line and zero-point positioning hole is parallel, and the center of circle of circular hole is corresponding with odd number, the even number of size scale respectively.

2, multi-functional ruler according to claim 1 is characterized in that the size scale of the upper and lower mark of main scale chi body, and a side is that integer is as 1,2,3 ... the cm scale, the opposing party is (an integer+5mm) as 1.5,2.5 ... the cm scale.

3, multi-functional ruler according to claim 1, the diameter D that it is characterized in that circular hole on the main scale chi body is a plurality of specifications, the diameter D of circular hole should be complementary with the thickness φ of detail pen.