CN102632746A

CN102632746A - Automatic chalk

Info

Publication number: CN102632746A
Application number: CN2011100353438A
Authority: CN
Inventors: 张春雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-10
Filing date: 2011-02-10
Publication date: 2012-08-15

Abstract

The invention provides an automatic chalk, relates to a teaching aid and particularly relates to a chalk with a chalk sleeve. The automatic chalk is composed of the chalk, a pen container, a chalk push cover and a pen container cover, wherein the pen container is in a tubular structure; the chalk push cover is placed in the pen container and the chalk is placed in the front end of the pen container; the chalk push cover is sleeved at the back end of the chalk; a strip-shaped through groove is arranged on the outer surface of the pen container along a vertical direction; teeth which are symmetrical with each other are arranged at two edges of the strip-shaped through groove; the back end of the chalk push cover is connected with a chalk press button; the lower end of the chalk press button is placed in the strip-shaped through groove and two sides of the lower end of the strip-shaped through groove are clamped on the teeth on two edges of the strip-shaped through groove; and the pen container cover is further arranged at the back end of the pen container. The automatic chalk solves the problem that the traditional chalk burns hands, damages skins and is not sanitary, and the enormous resource is wasted caused by that the chalk head cannot be used.

Description

Automatic chalk

Technical field

The present invention relates to teaching aid, be specifically related to a kind of chalk that chalk sleeve is arranged.

Background technology

The tradition chalk is write writing on the blackboard and is directly caught and touch chalk, burns hand, and injury skin is very unhygienic, and allergic person is suffered untold misery especially.Traditional chalk is cone-shaped, and the concentric reducer difference is very big, and microcephaly's contact plate face end is the plane; When just writing, lines are very thin, need get rid of; Just can write out the moderate chalk font of lines then; When writing the rear end, hand-held to be difficult for carrying the word line bar that writes out too thick, also thrown away the waste resource mostly.Because traditional chalk size head end thickness gap is bigger, sensation font when making the teacher write letter written with chalk, lines are inhomogeneous, cause the aesthetic property of font to descend.Traditional teacher's writing on the blackboard says from the energy with chalk because the teacher if want to write fluently, attractive in appearance, make on class that the student enjoys aesthetic feeling, must get rid of front end, throw away the rear end, wasted resource greatly.From the environmental protection aspects, traditional chalk, because the teachers' instruction writing on the blackboard, finger is the contact chalk directly, and teacher's skin is directly constituted injury, and serious allergy sufferers even band left-hand seat pack into the andante book, and this was both unbecoming, and it is next to write out letter written with chalk attractive in appearance again.Through chalk and the chalk sleeve after my the current design, should reach the purpose of energy savings, reach the able-bodied purpose of protection teacher again.

Traditional chalk also has following drawback, and the one, trapezium structure, front end are the cross section.Lines are meticulous when just writing, and therefore usually break sub-fraction off with the fingers and thumb; And to when back, the sensation of thick circle appears again in remaining part, hand-heldly is difficult for carrying, and has also usually thrown away.Cause the great wasting of resources.The 2nd, mainly be the chalk of lime composition, to the skin grievous injury.

Summary of the invention

The purpose of this invention is to provide a kind of automatic chalk, the invention solves traditional chalk and burn hand, injury skin, very unhygienic, and the chalk head can not with and cause the problem of the great wasting of resources.

Automatic chalk of the present invention is made up of chalk 1, pen container 2, chalk pushing cover 3 and pen container lid 4; Pen container 2 is a tubular-shaped structures, and chalk pushing cover 3 is arranged at pen container 2 inside, and chalk 1 is arranged in the front end of pen container 2, and chalk pushing cover 3 is enclosed within chalk 1 rear end; Outer surface at pen container 2 is vertically arranged with stripe shape groove 2-1; There is symmetrical tooth on stripe shape groove 2-1 both sides; Chalk pushing cover 3 rear ends are connected with chalk button 3-1; Chalk button 3-1 lower end is arranged in the stripe shape groove 2-1, and both sides, chalk button 3-1 lower end are stuck on the tooth on stripe shape groove 2-1 both sides; Also be provided with pen container lid 4 in the rear end of pen container 2.

Automatic chalk of the present invention, the word line bar thickness of being write out about 3mm, get rid of front end with traditional chalk and write the lines basically identical basically, have ensured that chalk writes the definition of lines, make back row student see that word is as the front row.Owing to adjustable slideway is arranged on the pen container, one grade of every accent is in the 4.2mm distance, and this can adjust the extension elongation of chalk, thereby has reached the environment protecting requirement, has also reached to write smoothly the effect that can freely reconcile.

The characteristics of the automatic chalk of the present invention are because there has been the pen container hand no longer directly to contact chalk, skin have been played very big protective effect.Pen container size thickness is consistent with traditional chalk, uses not have uncomfortable sensation, and chalk is originally as cylindrical.The bullet that front end has chamfered edge to form can directly be write.And chalk can use up not waste always.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the vertical view of Fig. 1.

Symbol description among the figure: chalk 1, pen container 2, stripe shape groove 2-1, bullet 2-2, chalk pushing cover 3, chalk button 3-1, pen container lid 4.

The specific embodiment

Below in conjunction with accompanying drawing and with illustrated embodiments the present invention is done detailed explanation.

Consult Fig. 1-Fig. 2, automatic chalk of the present invention is made up of chalk 1, pen container 2, chalk pushing cover 3 and pen container lid 4; Pen container 2 is a tubular-shaped structures, and chalk pushing cover 3 is arranged at pen container 2 inside, and chalk 1 is arranged in the front end of pen container 2, and chalk pushing cover 3 is enclosed within chalk 1 rear end; Outer surface at pen container 2 is vertically arranged with stripe shape groove 2-1; There is symmetrical tooth on stripe shape groove 2-1 both sides; Chalk pushing cover 3 rear ends are connected with chalk button 3-1; Chalk button 3-1 lower end is arranged in the stripe shape groove 2-1, and both sides, chalk button 3-1 lower end are stuck on the tooth on stripe shape groove 2-1 both sides; Also be provided with pen container lid 4 in the rear end of pen container 2.The forward outer surface of pen container 2 is bullet 2-2.

Above embodiment is the more preferably specific embodiment a kind of of the present invention, and common variation that those skilled in the art carry out in present technique scheme scope and replacement should be included in protection scope of the present invention.

Claims

1. automatic chalk is characterized in that, is made up of chalk (1), pen container (2), chalk pushing cover (3) and pen container lid (4); Pen container (2) is a tubular-shaped structures, and chalk pushing cover (3) is arranged at pen container (2) inside, and chalk (1) is arranged in the front end of pen container (2), and chalk pushing cover (3) is enclosed within chalk (1) rear end; Outer surface at pen container (2) is vertically arranged with stripe shape groove (2-1); There is symmetrical tooth on stripe shape groove (2-1) both sides; Chalk pushing cover (3) rear end is connected with chalk button (3-1); Chalk button (3-1) lower end is arranged in the stripe shape groove (2-1), and chalk button (3-1) both sides, lower end are stuck on the tooth on stripe shape groove (2-1) both sides; Also be provided with pen container lid (4) in the rear end of pen container (2).

2. automatic chalk as claimed in claim 1 is characterized in that, the forward outer surface of pen container (2) is bullet (2-2).