CN203063417U - Compasses for magnetic blackboard - Google Patents

Abstract

The utility model relates to a compass for a magnetic blackboard, which comprises an armrest and a left outrigger and a right outrigger connected together by a screw hinge, and is characterized in that: the end of the right outrigger is connected with a magnet through a spherical hinge capable of rotating 360 degrees . The utility model has the advantages of simple structure and convenient use, and effectively solves the problems that the compass pointed needle used for the blackboard is easy to slip, damages the blackboard and stabs the user, and is very practical. The circles drawn by the utility model are continuous and clear.

Description

Compasses for magnetic blackboard

technical field

The utility model relates to a teaching tool, in particular to a compass for a magnetic blackboard.

Background technique

With the improvement of teaching facilities, the blackboards used in many schools have changed from cement whitewashed to metal iron blackboards, but the compasses used by teachers in teaching are still the original wooden compasses with pointed needles. When this compasses is in use, not only the pointed needle is easy to slip, but also the blackboard is easily damaged, and its pointed needle is also easy to damage the user.

Utility model content

In order to solve the problems that the sharp needles of the compass used for the blackboard are easy to slip, damage the blackboard and stab the user, the utility model provides a compass for the magnetic blackboard, which has a simple structure and is convenient to use, and can effectively solve these problems.

The technical solution provided by the utility model is: a compass for a magnetic blackboard, including a handrail and a left leg and a right leg connected together by a screw hinge, which is characterized in that the end of the right leg passes through a 360-degree rotating The ball hinges are attached with magnets.

The utility model has the beneficial effects of simple structure and convenient use, which effectively solves the problems that the current blackboard-used compasses point needles are easy to slip, damage the blackboard and stab users, and are very practical.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among the figure: 1, armrest, 2, left supporting leg, 3, chalk holder, 4, screw hinge, 5, right supporting leg, 6, spherical hinge, 7, magnet.

Detailed ways

As shown in Figure 1, the magnetic blackboard compass of the present utility model includes an armrest 1 and a left leg 2 and a right leg 5 connected together by a screw hinge 4, wherein the end of the right leg 5 can be rotated 360 degrees through The ball hinge 6 is connected with a magnet 7, and the end of the left leg 2 is connected with a chalk container 3 for fixing chalk.

During use, first loosen the screw hinge, after adjusting the radius, tighten the screw hinge to fix the opening angle between the left leg and the right leg. Then attach the magnet to the iron blackboard and rotate it with your hand on the armrest. The right outrigger can be rotated 360 degrees through the spherical hinge, and the circle drawn is continuous and clear.

Claims (1)

1. A compass for a magnetic blackboard, comprising handrails and left legs and right legs connected together by screw hinges, characterized in that: the end of the right legs is connected with a magnet by a spherical hinge that can rotate 360 degrees.

Images