CN203172273U

CN203172273U - Circle drawing device

Info

Publication number: CN203172273U
Application number: CN 201320217642
Authority: CN
Inventors: 胡成伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-11
Filing date: 2013-04-11
Publication date: 2013-09-04
Anticipated expiration: 2023-04-11

Abstract

The utility model discloses a circle drawing device, which comprises a sucker and a base which is fixed on the sucker, wherein a bearing is arranged in the base, a rotating shaft is inserted in the bearing, the rotating shaft is connected with a straight rule, a chalk sleeve which can left-right slide along the straight rule is sleeved on the straight rule, a chalk is fixed in the chalk sleeve, a fixed bolt is arranged between the chalk sleeve and the straight rule, length scales are arranged on the straight rule, a rotating handle is fixed on the top portion of the rotating shaft, and a hanging hole is arranged on the rotating handle. The circle drawing device has the beneficial effects that 1 the circle drawing device is simple in structure; 2 the circle drawing device can measure without the straight rule, and is extremely convenient; 3 the circle drawing device is provided with the sucker, and can be conveniently sucked on a blackboard; 4 the circle drawing device can guarantee the rotating shaft to smoothly rotate; 5 the rotating handle is fixed on the top portion of the rotating shaft, the chalk sleeve and the straight rule can be conveniently rotated, thereby smoothly drawing circles; and 6 the hanging hole is arranged on the rotating handle, and the whole circle drawing device can be conveniently hung.

Description

A kind of round belting of painting

Technical field

The utility model relates to a kind of mathematical education instrument, particularly a kind of round belting of painting.

Background technology

At present, in mathematical education practice, the teacher generally paints circle with compasses, but existing compasses paint round in, also need to measure the radius of a circle that will draw with ruler, thereby very inconvenient.

Summary of the invention

Problem to be solved in the utility model is: a kind of simple in structure, round belting of painting of not needing to carry out with ruler radius is provided.

In order to address the above problem, the round belting of painting of the present utility model, comprise sucker, be fixed on the base on the sucker, be provided with bearing in the described base, be inserted with rotating shaft in the described bearing, be connected with a ruler in the described rotating shaft, be socketed with the chalk sleeve that an energy horizontally slips along ruler on the described ruler, chalk is fixedly arranged in the described chalk sleeve, be provided with set bolt between described chalk sleeve and the ruler, described ruler is provided with the length scale, and rotating handles is fixedly arranged at the top of described rotating shaft, and described rotating handles is provided with hanging hole.

The beneficial effect that the utility model is obtained is: (1) is simple in structure; (2) draw circles the time, by sucker the whole round belting of painting is fixed on the blackboard, according to drawing radius of a circle, the slip chalk sleeve also can be determined the position of chalk sleeve with reference to the length scale on the ruler, then chalk sleeve is fixed with set bolt, can draw out needed circle, no longer need in the whole process to measure with ruler, very convenient; (3) be provided with sucker, conveniently whole device be adsorbed on the blackboard; (4) be provided with bearing in the base, be inserted with rotating shaft in the described bearing, thereby the assurance rotating shaft can be rotated smoothly; (5) rotating handles is fixedly arranged at the top of rotating shaft, thereby is convenient to rotate chalk sleeve and ruler, draws thereby will justify smoothly; (6) rotating handles is provided with hanging hole, conveniently the whole round belting of painting is hung.

Description of drawings

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

Among the figure: 1, sucker, 2, base, 3, bearing, 4, hanging hole, 5, rotating handles, 6, ruler, 7, the length scale, 8, chalk sleeve, 9, set bolt, 10, chalk, 11, rotating shaft.

The specific embodiment

As shown in Figure 1, the round belting of painting of the present utility model, comprise sucker 1, be fixed on the base 2 on the sucker 1, be provided with bearing 3 in the described base 2, be inserted with rotating shaft 11 in the described bearing 3, be connected with a ruler 6 in the described rotating shaft 11, be socketed with the chalk sleeve 8 that an energy horizontally slips along ruler 6 on the described ruler 6, in the described chalk sleeve 8 chalk 10 is arranged fixedly, be provided with set bolt 9 between described chalk sleeve 8 and the ruler 6, described ruler 6 is provided with length scale 7, and rotating handles 5 is fixedly arranged at the top of described rotating shaft 11, and described rotating handles 5 is provided with hanging hole 4.

The round belting of painting of the present utility model, simple in structure, in the time of draw circles, by sucker 1 the whole round belting of painting is fixed on the blackboard, according to will drawing radius of a circle, slip chalk sleeve 8 also can be determined the position of chalk sleeve 8 with reference to the length scale 7 on the ruler 6, then that chalk sleeve 8 usefulness set bolts 9 are fixing, can draw out needed circle, no longer need in the whole process to measure with ruler 6, very convenient.

Be provided with sucker 1, thereby whole device can be adsorbed on the blackboard handled easily.

Be provided with bearing 3 in the base 2, be inserted with rotating shaft 11 in the described bearing 3, thereby assurance rotating shaft 11 can be rotated smoothly.

Rotating handles 5 is fixedly arranged at the top of rotating shaft 11, thereby is convenient to rotate chalk sleeve 8 and ruler 6, thereby smoothly circle is drawn out.

Rotating handles 5 is provided with hanging hole 4, conveniently the whole round belting of painting is hung.

Claims

1. paint round belting for one kind, it is characterized in that: comprise sucker (1), be fixed on the base (2) on the sucker (1), be provided with bearing (3) in the described base (2), be inserted with rotating shaft (11) in the described bearing (3), be connected with a ruler (6) in the described rotating shaft (11), be socketed with the chalk sleeve (8) that an energy horizontally slips along ruler (6) on the described ruler (6), chalk (10) is fixedly arranged in the described chalk sleeve (8), be provided with set bolt (9) between described chalk sleeve (8) and the ruler (6), described ruler (6) is provided with length scale (7), rotating handles (5) is fixedly arranged at the top of described rotating shaft (11), and described rotating handles (5) is provided with hanging hole (4).