CN201033508Y

CN201033508Y - Environment protection chalk sleeve

Info

Publication number: CN201033508Y
Application number: CNU2007200115265U
Authority: CN
Inventors: 吴春飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-09
Filing date: 2007-04-09
Publication date: 2008-03-12
Anticipated expiration: 2017-04-09

Abstract

The utility model relates to an environment-protecting chalk cap, which comprises an inner core tube and an outer bushing. The utility model is characterized in that: the inner core tube is fixed in the outer bushing; the head of the inner core tube is exposed out of the outer bushing and is divided into three pieces; a protruding housing is arranged at the port of each piece of the head; a movable small outer tube is sleeved on the head of the inner core tube; a spring is arranged at the back of the small outer tube; the other end of the spring is fixed on the outer bushing; the chalk is arranged in the inner core tube; an ejector which can push the chalk outward is arranged at the back of the outer bushing. The utility model adopts the principle of propelling pencil that the chalk is fixedly arranged in the head of the inner core tube, which is sleeved with a movable small outer tube; the chalk can be slowly pushed out with the motion between the ejector at the back of the chalk cap and the compression spring; therefore, the chalk is not easy to break. Meanwhile, the hand holds the outer bushing of the chalk cap without directly contacting the chalk when the utility model is being used; therefore, the utility model has the advantages that the pollution to the hand from chalk ash is prevented, the device is convenient to carry, and the length of the chalk during writing can be controlled.

Description

A kind of environmentally-friendly chalk holder

Technical field

The utility model relates to a kind of chalk of writing usefulness on blackboard, particularly relates to a kind of environmentally-friendly chalk holder with handguard function, is to the improvement of existing chalk structure, belongs to the school supply and stationery category.

Background technology

At present, the chalk that the teacher uses on the classroom is medium-sized chalk, its outward appearance is round table-like, it is long that the chalk of this standard exists length, hand held middle inconvenience when writing, the teacher also needs clamp chalk with hand when doing writing on the blackboard, thereby causes the pollution of chalk dust to finger, neither compliance with environmental protection requirements also is harmful to the healthy of teacher.The teacher who has in teaching process for prevent chalk dust dirty hand, paper commonly used wraps chalk and carries out writing on the blackboard, firmly changes slightly sometimes, chalk is just easily disconnected, have to throw away being left one section, has caused waste to school.

The utility model content

The purpose of this utility model is to overcome the prior art above shortcomings, provides a kind of novel environmentally-friendly chalk holder.This environmentally-friendly chalk holder adopts the principle of propelling pencil, chalk is put in the inner core tube head that movably is enclosed within the little overcoat fixing, along with the motion between the thimble of compression spring and chalk sleeve rear end, chalk will slowly stretch out, and frangibility is not handed chalk sleeve outer tube sleeve place when using simultaneously, no longer directly contact chalk, both prevented chalk dust adversary's pollution, be easy to carry again, but also the length of controlled imperial decree chalk when writing.

The technical scheme that the utility model provides is: this environmentally-friendly chalk holder includes inner core tube and outer tube, be characterized in that described inner core tube is fixed in the outer tube, the head of inner core tube exposes outer tube and is divided into three, the every draught animals all is provided with outstanding shell, be with movably little outer tube on the head of inner core tube, the rear portion of this little outer tube is provided with spring, the other end of this spring is fixed on the outer tube, in the described inner core tube chalk is housed, the rear end of described outer tube is provided with one can be toward the thimble of extrapolated chalk.

Compared with prior art, the beneficial effects of the utility model are: the principle that adopts propelling pencil, chalk is put in the inner core tube head that movably is enclosed within the little overcoat fixingly, along with the motion between the thimble of compression spring and chalk sleeve rear end, chalk will slowly stretch out, frangibility not, hand-held chalk sleeve outer tube sleeve place no longer directly contacts chalk when using simultaneously, has both prevented chalk dust adversary's pollution, be easy to carry again, but also the length of controlled imperial decree chalk when writing.

Description of drawings

Fig. 1 is a schematic appearance of the present utility model;

Schematic diagram when Fig. 2 adorns chalk for the utility model.

The specific embodiment

As Fig. 1～shown in Figure 2, this environmentally-friendly chalk holder includes inner core tube 1 and outer tube 4, inner core tube 1 is fixed in the outer tube 4, the head 6 of inner core tube 1 exposes outer tube 4 and is divided into three, and the every draught animals all is provided with outstanding shell, is with movably little outer tube 2 on the head 6 of inner core tube 1, the rear portion of this little outer tube 2 is provided with spring 3, the other end of this spring 3 is fixed on the outer tube 4, in the inner core tube 1 chalk is housed, and the rear end of outer tube 4 is provided with one can be toward the thimble 5 of extrapolated chalk.

During use, elder generation is with the movably little outer tube 2 past pushers at head 6 places of the inner core tube 1 of environmentally-friendly chalk holder, spring 3 is compressed and exposes three draught animals of the head 6 of inner core tube 1, then chalk is put in, one looses one's grip, spring 3 pushes away movably little outer tube 2 forward, thereby chalk is clamped, and at this moment just can use.When chalk when having lacked, as long as in pusher, press the thimble 5 of outer tube 4 rear ends, just can make the chalk that is equipped with in the inner core tube 1 expose one section again and use for the people at movably little outer tube 2.

Claims

1. environmentally-friendly chalk holder, include inner core tube and outer tube, it is characterized in that described inner core tube is fixed in the outer tube, the head of inner core tube exposes outer tube and is divided into three, and the every draught animals all is provided with outstanding shell, is with movably little outer tube on the head of inner core tube, the rear portion of this little outer tube is provided with spring, the other end of this spring is fixed on the outer tube, in the described inner core tube chalk is housed, and the rear end of described outer tube is provided with one can be toward the thimble of extrapolated chalk.