CN2210794Y

CN2210794Y - Clean-keeping automatic chalk

Info

Publication number: CN2210794Y
Application number: CN 95203163
Authority: CN
Inventors: 车玉成; 王秀正
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-25
Filing date: 1995-02-25
Publication date: 1995-10-25
Anticipated expiration: 2005-02-25

Abstract

The utility model relates to an improved chalk used for writing on a blackboard. A pen clip and a tightening loop are arranged between the front end of a pen holder filled with a chalk and a tightly screwed standby cap. A telescoping tube is inserted into the pen holder from the other end of the pen holder and is just buckled on an inner tube, and the inner tube, a pressure spring, and a shim are sheathed on a lug boss of the pen holder. When a cleanness-keeping automatic chalk made according to the structure is used for writing, hands do not directly touch the chalk, so hands and clothes are kept clean. The utility model can keep hands healthy and beautiful and does not easily breaks. The main components of the chalk are all made of plastics.

Description

Clean-keeping automatic chalk

The utility model relates to writes the improvement of using chalk to a kind of blackboard.

Usually blackboard is write the clothing of making dirty with chalk Chang Yi; The long-time chalk that uses, finger becomes coarse; The chalk frangibility, waste is big.

The purpose of this utility model is to provide a kind of automatic chalk of keeping a public place clean, and hand does not directly contact with chalk during writing on the blackboard, can keep hand and clothing cleaning, keeps the fitness of hand, and chalk is frangibility not.

The utility model is to realize so in conjunction with the accompanying drawings.The front end of the penholder 6 that chalk 2 is housed and screw be equipped with 3 on cap, pen card 4 and tight loop 5 that one 3～4 lobes that are connected as a single entity with interior pipe 9 are arranged, is furnished with the plug-in type cap for brush 1 before being equipped with cap, telescoping tube 10 is withheld on inner pipe in the other end insertion penholder of penholder just, and interior pipe and stage clip 8, pad 7 covers install on the boss of penholder.

Also can be stained with ash wiping 12 and plug-type pressure cap 11 of felt at the telescoping tube rear portion that has groove.

The automatic chalk of making according to said structure of keeping a public place clean.Pull up telescoping tube from the rear portion, the chalk that the two ends diameter is identical inserts in the telescoping tube, telescoping tube is withheld on inner pipe again, repeatedly withholds pressure cap and makes chalk protrude 5～15mm before being equipped with cap, can be at the enterprising andante book of blackboard.Short when the nib consumption, withhold pressure cap more repeatedly and make the nib elongation.Not the time spent, penholder inserts in the cap for brush.The penholder rear portion is provided with ash and wipes, and is applicable to the minor error of wiping in the writing on the blackboard.Hand does not directly contact with chalk during writing on the blackboard, can keep hand and clothing cleaning, keeps the fitness of hand, and chalk is frangibility not.The automatic chalk that uses the utility model to provide can adopt pen, writing brush and the common chalk mode that holds a pen, and helps carrying out the chalk calligraphy art.The main parts in addition of this pen all adopt plastics to make, and are attractive in appearance, durable, be convenient to make, easily promote.

Description of drawings:

Fig. 1 automatic chalk structural representation of keeping a public place clean

Embodiment: pressing structure shown in the accompanying drawing, is example with the chalk of application diameter 8mm, and its important technological parameters design is as follows:

Penholder diameter 16mm, length overall 150mm, the pen card is 4 lobes, the effectively long 20mm of stage clip turns to diameter 0.5mm steel wire.This pen all adopts plastics to make except that stage clip.

The main parts in addition of this pen all adopt plastics to make, manufacturing attractive in appearance, durable, easy, easily popularization.

Claims

1, a kind of automatic chalk of keeping a public place clean, it is characterized in that the front end of the penholder 6 that chalk 2 is housed and screw be equipped with 3 on cap, one pen card 4 and the tight loop 5 that is connected as a single entity with interior pipe 9 arranged, telescoping tube 10 is withheld on inner pipe in the other end insertion penholder of penholder just, and interior pipe and stage clip 8, pad 7 covers install on the boss of penholder.

2,, it is characterized in that being stained with ash wiping 12 and plug-type pressure cap 11 of felt at the telescoping tube rear portion that has groove according to the said automatic chalk of keeping a public place clean of claim 1.