CN2243393Y - Convenient multipurpose teaching drawing ruler - Google Patents

Abstract

A convenient multipurpose ruler for teaching and drawing is a tool for drawing various teaching drawings on a blackboard. The ruler comprises a large ruler (1) and a small ruler (2), wherein one end of the small ruler is provided with a screw (3) connected to the large ruler. An angle meter (4) is arranged at the intersection of the small ruler and the large ruler, and the small ruler can be rotated according to the required angle to draw and measure angles. A chalk sleeve movable empty groove (5) is arranged in the large ruler, and the chalk sleeve (6) can move back and forth. The groove (7) enables a chalk sleeve lug (shown in figure 2.2) to be clamped in, and plays the roles of fixing the chalk sleeve to prevent the chalk sleeve from moving up and down and sliding back and forth conveniently; the round nail (8) on the big ruler plays the role of a central point. The utility model discloses convenient to carry, the function is many, and the preparation is convenient.

Description

Convenient multi-purpose teaching drawing ruler

The utility model is a kind of teaching aid, draws when being applicable to teaching.

When the teacher draws on blackboard, all will use ruler, set square, protractor, compasses etc. usually, these teaching aid volumes are big, quantity is carried teacher's inconvenience more.The purpose of this utility model is that a kind of utensil that not only had been convenient for carrying but also had had functions such as ruler, set square, protractor, compasses will be provided, to make things convenient for teachers ' teaching.

The purpose of this utility model is achieved in that convenient multi-purpose teaching drawing ruler likeness in form one uses ruler to teaching, and the one side is carved with scale can draw straight line; And this ruler one end has one to give prominence to about half centimetre wire nail, in the middle of this ruler a dead slot is arranged, and the chalk sleeve that can move forward and backward in groove is housed in the groove; Desire is drawn bowlder, with wire nail ruler one end is fixed on the blackboard, and chalk sleeve puts chalk, and moves chalk sleeve by required radius, stops to required scale, around wire nail rotation ruler, can obtain required circle then; And studding with a little ruler in this ruler one side, this little ruler one end is connected with big ruler with screw, and this little ruler can rotate and big ruler formation 90 is spent (comprising that 90 spend) with interior any angle around screw.On the big ruler plate that little ruler and big ruler intersect, carved the angle table, when drawing the angle like this, can open little ruler according to required angle, draw the angle of required angle.When drawing the angle that exceeds 90 degree, can draw system according to the supplementary angles principle.

At present the drawing teaching apparatus is compared, and the utlity model has molten setting-out, draws circle, draws the angle, angulation is the function of one, and little, the portative advantage of volume is arranged.

The utility model is provided by following examples and accompanying drawing thereof:

Fig. 1 is overall structure figure; Fig. 2 is chalk sleeve ear figure.Describe concrete structure of the present utility model and working condition in detail below in conjunction with Fig. 1, Fig. 2.

The utility model has big ruler (1), and little ruler (2), little ruler are set in big ruler one side, and an end is fixing with screw (3), and little ruler is rotated around big ruler.Should be identical substantially when little ruler folds into big ruler one side.When opening little ruler, little ruler has angle table (4) with big ruler intersection, can draw angle, angulation in view of the above.And the movable dead slot (5) of chalk sleeve is arranged in the big ruler, and chalk sleeve (6) is arranged in the groove, there is chalk sleeve ear (9) at the chalk sleeve two ends, and the cover ear can clamp in the groove (7) on movable dead slot both sides, and chalk sleeve just can move forward and backward and not deviate from.And big ruler one end has outstanding nearly half a centimetre wire nail (8).Draw bowlder, on chalk sleeve, put chalk, and do the center of circle with wire nail and be fixed on the blackboard, move chalk sleeve by the length of radius, rotate then the loose end of big ruler get final product desired circle.

Preparation method: available plastic injection-moulded, or process with timber.

Claims (6)

1. reach some chart boards drawing apparatus on the multifunction teaching drawing ruler, particularly blackboard, it is characterized in that this usefulness has big ruler (1), big ruler one side has little ruler (2), and two rulers, one end connects with screw (3), can outward winding, and there is graduation apparatus (4) intersection; The movable dead slot (5) of chalk sleeve is arranged in the big ruler, chalk sleeve (6) is arranged in the dead slot, the chalk sleeve two ends have chalk sleeve ear (9) can clamp into groove (7), at will do not slide and can not move up and down with front and back; Big ruler one end has wire nail (8), can do the center of circle.

2, device according to claim 1 is characterized in that the middle big ruler (1) that dead slot is arranged of rectangle.

3, device according to claim 1 is characterized in that big ruler (1) one side has little ruler (2) and uses screw (3) to connect

4, device according to claim 1 is characterized in that having in the big ruler (1) its both sides of dead slot (5) that groove (7) is arranged

5, device according to claim 1 is characterized in that having in the big ruler (1) in the dead slot (5) and can clamp into band ear chalk sleeve (6), and its ear can clamp into groove (7).

6, device according to claim 1 is characterized in that big ruler (1) one end has wire nail (8).

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