CN2797058Y

CN2797058Y - Holding tube for saving chalk and not smear hand

Info

Publication number: CN2797058Y
Application number: CN 200520017413
Authority: CN
Inventors: 帕塔尔·阿不来克木
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-16
Filing date: 2005-04-16
Publication date: 2006-07-19
Anticipated expiration: 2015-04-16

Abstract

The utility model relates to a clamping tube for saving chalks without any damage to hands, which belongs to the field of teaching articles. One end of a hollow cylindrical tube body which is slightly longer than a chalk is closed, and the other end is opened, wherein the center of the closed end is provided with a small hole; a connecting rod is inserted in the small hole; the outer end of the connecting rod is connected with a circular pushing block, and the inner end extends into the cavity of the tube body and is connected with the inner end of a hollow cylindrical chalk clamp; the outer end of the chalk clamp is provided with an opening. A spring is sheathed on the connecting rod in the tube body, and U-shaped clamping grooves arrayed at intervals are arranged along the long axis direction of the outer wall of the tube body, wherein openings of the U-shaped clamping grooves are communicated with each other. A hollow cylindrical plastic clamping tube is arranged in the cavity of the chalk clamp, and a penetrative slit is arranged along the long axis direction of the tube wall. The chalk clamp is provided with a screw rod hole with screw threads, and a screw rod is penetrated in the screw rod hole. The clamping tube can avoid smudging human hands from chalk dust, and moreover, the chalk can be used maximally.

Description

The card tube of hand-dirtying-free saving chalk

1, technical field: the card tube of hand-dirtying-free saving chalk of the present utility model belongs to the realia field.

2, background technology: when using chalk writing, the one, the dirty staff of chalk dust, the 2nd, because the bad gripping of chalk afterbody often is dropped, cause waste.

3, summary of the invention: the purpose of this utility model is to propose a kind of card tube of hand-dirtying-free saving chalk.

The purpose of this utility model is achieved in that cavity cylindrical barrel one an end sealing slightly longer than chalk, one end is uncovered, the blind end center has aperture, be installed with connecting rod, the connecting rod outer end connects with circular jacking block, the inner is stretched in the cylinder chamber and is linked to each other the outer end opening of chalk folder with the inner of the cylindric chalk folder of a cavity.Be set with spring on the connecting rod in cylindrical shell, have the U-shaped draw-in groove that is spaced open communication along the cylinder body outer wall length direction.Chalk folder cavity inner sleeve has the cylindric plastic clip tube of cavity, has the entire body slit along this barrel long axis direction.Have threaded screw hole on the chalk folder, be installed with screw rod.Chalk one end is inserted the folder tube, will press from both sides tube and put into the chalk folder, be screwed into screw rod, its inner contacts the folder drum outer wall, thereby forces the folder diameter chalk end that is locked that diminishes.Jacking block is outwards pulled out, meanwhile screw rod is left behind and snapped in the U-shaped draw-in groove of farthest as rifle bolt, the big portion of chalk this moment enters in the cylindrical shell, an end expose cylindrical shell uncovered a little.In writing on the blackboard along with the shortening of chalk exposure end, with screw rod in rifle bolt pushes a last U-shaped draw-in groove.So, only remain one section extremely short in the folder tube until chalk.

Owing to adopt technique scheme, just can avoid the dirty staff of chalk dust, and chalk is used to greatest extent, avoided waste.

4, description of drawings: concrete structure of the present utility model is provided by following drawings and Examples

The card barrel structure schematic diagram of Fig. 1, hand-dirtying-free saving chalk

The card tube vertical section schematic diagram of Fig. 2, hand-dirtying-free saving chalk

The card tube schematic cross-sectional view of Fig. 3, hand-dirtying-free saving chalk

5, the specific embodiment:

Legend: 1, jacking block 2, connecting rod 3, draw-in groove 4, cylindrical shell 5, folder tube 6, screw rod 7, chalk folder 8, spring 9, slit 10, chalk

Embodiment: as Figure 1-3, with cavity cylindrical barrel 4 one an ends sealing slightly longer than chalk, one end is uncovered, the blind end center has aperture, be installed with connecting rod 2, connecting rod 2 outer ends connect with circular jacking block 1, and the inner is stretched in cylindrical shell 4 chambeies and linked to each other the outer end opening of chalk folder 7 with the inner of the cylindric chalk folder 7 of a cavity.Be set with spring 8 on the connecting rod 2 in cylindrical shell 4, have the U-shaped draw-in groove 3 that is spaced open communication along cylindrical shell 4 outer wall length directions.Chalk presss from both sides 7 cavity inner sleeves the cylindric plastic clip tube 5 of cavity, has entire body slit 9 along this barrel long axis direction.Have threaded screw hole on the chalk folder 7, be installed with screw rod 6.

During use, chalk 10 1 ends are inserted folder tube 5, will press from both sides tube 5 and put into chalk folder 7, be screwed into screw rod 6, its inner contacts folder tube 5 outer walls, thereby forces folder 5 diameter chalk 10 ends that are locked that diminish.Jacking block 1 is outwards pulled out, meanwhile screw rod 6 is left behind and snapped in the U-shaped draw-in groove 3 of farthest as rifle bolt, this moment, chalk 10 big portions entered in the cylindrical shell 4, an end expose cylindrical shell 4 uncovered a little.In writing on the blackboard along with the shortening of chalk 10 exposure ends, with screw rod 6 in rifle bolt pushes a last U-shaped draw-in groove 3.So, remain one section extremely short in the folder tube 5 until 10 in chalk.The screw rod 6 of oppositely back-outing is poured out the chalk head in the folder tube 5 certainly, changes the outfit and goes up new chalk 10.

Claims

1, the card tube of hand-dirtying-free saving chalk, it is characterized in that: cavity cylindrical barrel one end slightly longer than chalk seals, one end is uncovered, the blind end center has aperture, be installed with connecting rod, the connecting rod outer end connects with circular jacking block, the inner is stretched in the cylinder chamber and is linked to each other with the inner of the cylindric chalk folder of a cavity, the outer end opening of chalk folder is set with spring on the connecting rod in cylindrical shell, has the U-shaped draw-in groove that is spaced open communication along the cylinder body outer wall length direction, chalk folder cavity inner sleeve has the cylindric plastic clip tube of cavity, have the entire body slit along this barrel long axis direction, have threaded screw hole on the chalk folder, be installed with screw rod.