CN202062867U

CN202062867U - Automatic chalk popping-up device

Info

Publication number: CN202062867U
Application number: CN2011201297892U
Authority: CN
Inventors: 江逸峰
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2011-12-07
Anticipated expiration: 2021-04-28

Abstract

The utility model discloses an automatic chalk popping-up device. The popping-up device comprises a chalk and a chalk sleeve; the chalk is arranged in the chalk sleeve; the chalk sleeve is internally provided with an automatic popping-up piece; the automatic popping-up piece controls and connects the chalk; the chalk sleeve is the round chalk sleeve; a control piece is arranged at the upper end of the chalk sleeve and controls and connects the automatic popping-up piece; a mounting groove is arranged inside the chalk sleeve; and a plurality of chalks are arranged in the mounting groove. The automatic chalk popping-up device is simply structured and is convenient to use; the chalk is arranged in the chalk sleeve so that dust is prevented from drifting down when the chalk is used for writing; therefore, the quantity of dust drifting down is greatly reduced; furthermore, a plurality of chalks are arranged in the chalk sleeve so as to save the time of exchanging the chalk, thereby being environmentally friendly as well as saving time.

Description

The automatic device for ejecting of a kind of chalk

Technical field:

The utility model relates to a kind of teaching aid, relates in particular to the automatic device for ejecting of a kind of chalk.

Background technology:

The teacher often uses chalk to need to write on blackboard, to draw and explain, in a class of 45～50 minutes, will erasable several, and following class hour is often on hand, on the sleeve, even all stay one deck white chalk dust on the hair, shoulder.Like this everyday, year after year, work after 20～30 years, worn down ten hundreds of chalks.Whether, be numerous teachers most deeply concerned problem, chalk is made by gypsum if sucking some chalk dusts inevitably from the nostril, sucking chalk dust and cause a disease, the composition of gypsum is a calcium sulfate, and the gypsum stable performance is nontoxic.　　

Using the chalk writing board book, is that gypsum powder is coated on the blackboard.During blackboard wiping, near gypsum dust (chalk dust) object plane and on the ground blackboard that in air, falls after of short duration the waving, its particle is bigger, and is heavier how more than 100 microns, falls comparatively fast, and the time of aloft floating is short.According to the labour health interrelated data, production, the airborne dust particle of living environment, diameter are inhaled timely majority through the nostril and are stopped by vibrissa, nose, pharynx, throat, attached to little air flue of mucous membrane and alveolar person more than 10～20 microns.If the material (as silica, asbestos) harmful to body accumulates morely, will cause severe impairment to human body in alveolar and little air flue.

From the above, the particle of chalk dust is bigger, scarcely can be drawn into lower respiratory tract, adds that again gypsum itself is nontoxic to human body, and medical circle does not still have the report that causes PUD D because of the suction chalk dust so far yet.China labour health department is in the pertinent regulations of professional pneumoconiosis, also not with the cause of disease of chalk dust as lung.Although chalk dust there is no big evil to human body, however the millions of teacher of China, and all will do writing on the blackboard with chalk every day, all lives in every day in the chalk dust behind the blackboard wiping, still can cause nose, pharynx, throat's discomfort.

The utility model content:

The purpose of this utility model is to be used for remedying deficiencies such as the prior art chalk dust flies upward when writing everywhere, and provides a kind of chalk easy to use, that dust is difficult for descending slowly and lightly automatic device for ejecting.

To achieve these goals, the technical solution of the utility model is as follows:

The automatic device for ejecting of a kind of chalk, described device for ejecting comprises the chalk and the pen cap, described chalk is installed in the described pen cap, is provided with automatic expelling means in the described pen cap, automatically the described chalk of expelling means control connection.

The described pen cap is the circular pen cap, and its upper end is provided with control piece, the described automatic expelling means of described control piece control connection.

Be provided with mounting groove in the described pen cap, a plurality of chalks are installed in the described mounting groove.

The automatic device for ejecting of a kind of chalk of the utility model is simple in structure, easily manufactured, chalk is installed in the pen cap, when using chalk to write, placed descending slowly and lightly of dust, significantly reduced the dust amount of descending slowly and lightly, and a plurality of chalks are installed in the pen cap, saved the time of changing chalk, not only environmental protection but also save time.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model user mode figure.

The specific embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

With reference to shown in Figure 1:

The automatic device for ejecting of a kind of chalk, device for ejecting comprises the chalk 1 and the pen cap 2, described chalk 1 is installed in the described pen cap 2, the pen cap 2 is circular, be provided with a mounting groove 21 that is used to install chalk 1 in the pen cap, the size of the mounting groove 21 just external diameter with described chalk 1 is suitable, and chalk 1 can slide in mounting groove, a plurality of chalks 1 are installed in the described pen cap 2, have saved the time of changing chalk 1 like this.

Chalk 1 is installed in the pen cap 2 and plays a protective role on the one hand; prevent fractureing of chalk 1; also controlled descending slowly and lightly of dust on the other hand; in the pen cap 2, be provided with automatic expelling means 3; by the described chalk 1 of automatic expelling means 3 control connections; the time spent of doing that is subjected to external force when automatic expelling means 3 can write the chalk ejection; be provided with control piece 4 in the upper end of the pen cap 2; realize the action of automatic expelling means 3 by pushing control piece 4; and then expelling means 3 ejects the pen cap 2 with chalk 1 automatically, as shown in Figure 2.

When using the utility model, the chalk 1 of at first in the pen cap 2, packing into, in the process of installing, control piece 4 is pulled up, by its upper end chalk 1 is installed in the mounting groove 21, the size of mounting groove 21 can be provided with according to the quantity of using chalk 1, installs chalk 1 and afterwards control piece 4 is replaced, when control piece 4 is exerted pressure, automatically ejection piece installing 3 will be placed on chalks 1 ejection in the mounting groove 21, so just can use the chalk 1 of ejection to write.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. automatic device for ejecting of chalk, described device for ejecting comprises the chalk and the pen cap, it is characterized in that, described chalk is installed in the described pen cap, is provided with automatic expelling means in the described pen cap, automatically the described chalk of expelling means control connection.

2. the automatic device for ejecting of a kind of chalk according to claim 1 is characterized in that the described pen cap is the circular pen cap, and its upper end is provided with control piece, the described automatic expelling means of described control piece control connection.

3. the automatic device for ejecting of a kind of chalk according to claim 1 is characterized in that, is provided with mounting groove in the described pen cap, and a plurality of chalks are installed in the described mounting groove.