CN202573423U - Chalk lengthener - Google Patents

Abstract

The utility model provides a chalk lengthener. A base is of a cylinder, a circular groove is arranged on the upper end face of the base, a cover body is fixedly arranged in the groove in connecting mode, a fixed valve is arranged on the cover body, a sucker is arranged on the lower end face of the base, and three equidistant arc-shaped concave surfaces are arranged on the outer side of the base. Compared with the prior art, the chalk lengthener is simple in structure and process, convenient and simple to use, wide in application, low in manufacturing cost and the like.

Description

Chalk lengthening device

Technical field the utility model relates to a kind of teaching aid, relates in particular to a kind of chalk lengthening device.

Background technology is well-known, the teacher at school the time chalk be the apparatus that often uses, though occurred the teaching of modes such as multimedia now; But writing on the blackboard remains teacher's widely used mode of giving a lesson; And the teacher if chalk is lacked then is not easy very much to write, not only causes waste if throw away when utilizing chalk to write writing on the blackboard; And contaminated environment, so provide a kind of chalk lengthening device very necessary.

The purpose of summary of the invention the utility model is to provide a kind of structure, technology simple, is easy to use, simple and direct, is widely used, and low preparation cost satisfies the chalk that uses with the operational requirements device that extends.

The utility model comprises pedestal, body, sucker and standing valve, and pedestal is a cylinder, and circular groove is offered in the upper surface of pedestal, affixed body in the groove, and body is provided with standing valve; The lower surface of pedestal is provided with sucker; The lateral surface of pedestal is provided with the arc-shaped concave of three equidistance.

The utility model is inserted in chalk in the body in use, utilizes standing valve that chalk is fastening, holds handle, utilizes three fingers to pinch three arc-shaped concaves in the pedestal outside when holding, and so not only points comfortablely, and writes laborsaving; The sucker of base bottom plays the effect of firm integral body, avoids when placing, toppling over.

The utility model compared with prior art has following advantage:

Description of drawings Fig. 1 is the three-dimensional simplified schematic diagram of the utility model.

The specific embodiment is in the three-dimensional simplified schematic diagram of chalk lengthening device shown in Figure 1, and pedestal 1 is a cylinder, and circular groove 2 is offered in the upper surface of pedestal, affixed body 3 in the groove, and body is provided with standing valve 4; The lower surface of pedestal is provided with sucker 5; The lateral surface of pedestal is provided with the arc-shaped concave 6 of three equidistance.

Claims (1)

1. a chalk lengthening device comprises pedestal, body, sucker and standing valve, and it is characterized in that: pedestal is a cylinder, and circular groove is offered in the upper surface of pedestal, affixed body in the groove, and body is provided with standing valve; The lower surface of pedestal is provided with sucker; The lateral surface of pedestal is provided with the arc-shaped concave of three equidistance.

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