CN203381393U - Portable multipurpose ruler for blackboard - Google Patents

Abstract

The utility model provides a portable multipurpose ruler for a blackboard. The portable multipurpose ruler comprises a fixing end and two legs. The two legs can be opened and closed relative to the fixing end, a fixing mechanism for fixing chalks is arranged at a far end of the first leg, and a far end of the second leg is connected with a magnetic supporting portion by a universal shaft. According to the scheme, the portable multipurpose ruler has the advantages that the portable multipurpose ruler is reasonable in structure, and straight lines and circles can be accurately drawn by the aid of the portable multipurpose ruler.

Description

A kind of Portable blackboard multipurpose ruler

Technical field

The utility model relates to education and instruction auxiliary implement technical field, refers to especially a kind of Portable blackboard multipurpose ruler.

Background technology

For major part domestic education, especially basic education, blackboard is all an important teaching aid.In prior art, while mapping on blackboard, be difficult to guarantee accuracy, especially at the blackboard upper drawing circle.

For existing blackboard ruler, be generally all according to small-sized ruler amplification transformation.But, due to the mode that is arranged vertically of blackboard and special structure, cause teaching aid inconvenience to be used.And the degree of accuracy is low, portable performance is poor.

The utility model content

The technical problems to be solved in the utility model is to provide the more rational Portable blackboard multipurpose ruler of a kind of structure.

For solving the problems of the technologies described above; embodiment of the present utility model provides a kind of Portable blackboard multipurpose ruler; comprise stiff end and can be with respect to two legs of described stiff end folding; the far-end of the first leg is provided with the fixedly fixed mechanism of chalk, and the far-end of the second leg connects magnetic support section by universal drive shaft; Described the first leg is provided with the dial of fixing arc, it is characterized in that, described dial is provided with the gathering sill of arc, and described the second leg is provided with the projection suitable with described gathering sill, and described projection stretches in described gathering sill; The fixed mechanism of described the first leg comprises for three fixed claws of fixing chalk and is socketed in the outer sleeve pipe of described three fixed claws; The far-end of described the second leg connects magnetic support section by universal drive shaft; Be respectively equipped with folding kink on described the first leg and the second leg;

Wherein, described projection is provided with fixture described fixture and described dial is fixed;

Wherein, described dial is provided with the angle indicator scale;

Wherein, the outer surface of described the first leg is provided with the Length Indication scale.

The beneficial effect of technique scheme of the present utility model is as follows:

Adopt more rational structure, drafting straight line and circle that can be more accurate in such scheme.Such scheme is usingd basic ruler moulding as support, and appearance and modeling is similar to small-sized compasses.Write disadvantageous problem in order to solve common small-sized compasses on blackboard, all be provided with respectively kink on two legs, to improve convenience.There is a dial at subtended angle place at compasses, and can fix by the fixture on projection, to draw default big or small circle.Because therefore existing blackboard can be connected magnetic support section by universal drive shaft and be supported by magnet adsorption mostly on the second leg as the rotational support pin, improve the stability supported on blackboard simultaneously.And on another first leg, be provided with the clamping chalk fixed mechanism.This fixed mechanism adopts the design of the scroll chuck form that is similar to lathe, can either play and clamp preferably effect, again self-centering can be arranged, and improves the effect of the degree of accuracy.For the expanded application scope, the ruler scale also is housed on the first leg, it also can be used as ruler.

The accompanying drawing explanation

The structural representation of the Portable blackboard multipurpose ruler that Fig. 1 is the utility model embodiment.

Description of reference numerals:

1, dial;

2, Length Indication scale;

3, leg;

4, universal drive shaft;

5, magnetic support section;

6, three fixed claws;

7, sleeve pipe;

8, chalk.

The specific embodiment

For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.

The utility model, for ruler inconvenience use for existing blackboard, the low poor problem of portable performance that reaches of the degree of accuracy, has proposed a kind of Portable blackboard multipurpose ruler.

As shown in Figure 1, this Portable blackboard multipurpose ruler that the utility model embodiment provides, comprise stiff end and can be with respect to two legs 3 of described stiff end folding, the far-end of described the first leg is provided with the fixedly fixed mechanism of chalk, and the far-end of described the second leg connects magnetic support section 5 by universal drive shaft 4.

As shown in Figure 1, described the first leg is provided with the dial 1 of fixing arc, and described dial is provided with the gathering sill of arc, and described the second leg is provided with the projection suitable with described gathering sill, and described projection stretches in described gathering sill.Described projection is provided with fixture fixes described fixture and described dial.Described dial is provided with the angle indicator scale.The outer surface of described the first leg is provided with Length Indication scale 2.

As shown in Figure 1, described fixed mechanism comprises for three fixed claws 6 of fixing chalk 8 and is socketed in the outer sleeve pipe 7 of described three fixed claws 6.Such three fixed claws 6 can fix/unclamp chalk 8 under the constraint of sleeve pipe 7.As shown in Figure 1, all be respectively equipped with folding kink 3 on described the first leg and the second leg.

Such scheme is usingd basic ruler moulding as support, and appearance and modeling is similar to small-sized compasses.Write disadvantageous problem in order to solve common small-sized compasses on blackboard, all be provided with respectively kink on two legs, to improve convenience.There is a dial at subtended angle place at compasses, and can fix by the fixture on projection, to draw default big or small circle.Because therefore existing blackboard can be connected magnetic support section by universal drive shaft and be supported by magnet adsorption mostly on the second leg as the rotational support pin, improve the stability supported on blackboard simultaneously.And on another first leg, be provided with the clamping chalk fixed mechanism.This fixed mechanism adopts the design of the scroll chuck form that is similar to lathe, can either play and clamp preferably effect, again self-centering can be arranged, and improves the effect of the degree of accuracy.For the expanded application scope, the ruler scale also is housed on the first leg, it also can be used as ruler.

The above is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (1)

1. a Portable blackboard multipurpose ruler, comprise stiff end and can be with respect to two legs of described stiff end folding, and the far-end of the first leg is provided with the fixedly fixed mechanism of chalk, and the far-end of the second leg connects magnetic support section by universal drive shaft; Described the first leg is provided with the dial of fixing arc, it is characterized in that, described dial is provided with the gathering sill of arc, and described the second leg is provided with the projection suitable with described gathering sill, and described projection stretches in described gathering sill; The fixed mechanism of described the first leg comprises for three fixed claws of fixing chalk and is socketed in the outer sleeve pipe of described three fixed claws; The far-end of described the second leg connects magnetic support section by universal drive shaft; Be respectively equipped with folding kink on described the first leg and the second leg;

Wherein, described projection is provided with fixture described fixture and described dial is fixed;

Wherein, described dial is provided with the angle indicator scale;

Wherein, the outer surface of described the first leg is provided with the Length Indication scale.

Images