CN2866172Y - Chalk box - Google Patents

Abstract

A chalk pot can hold chalks to write. Symmetrical clamps are set at the front end of external shell of chalk pot. The external shell has gaps at the place of contacting clamps. Clamps are connected with chalk pot through round column pins and single-arm bending spring. Without external force, clamps extend to the pencil pot due to the elastic force of spring. When clamp end is pressed with hands, clamp head opens outwards, and chalks are placed. When hands are released, chalks will be held tightly. There is a handspike at the bottom of chalk pot for adjusting the extension of chalks.

Description

The chalk tube

Affiliated technical field

The utility model relates to a kind of teaching aid, the especially a kind of chalk tube that can clamp chalk.

Background technology

People normally directly arrest chalk with finger and write when writing with chalk, and after the use, finger sticks chalk dust, and is very unhygienic.

Summary of the invention

In order not make the chalk ash pollution finger, the utility model provides a kind of can clamp the chalk tube that chalk is write.

The technical scheme that its technical problem that solves the utility model adopts is: pen container shell front end is equipped with symmetrical clip, the pen container shell with chuck contact position Liu Kou, clip is connected by straight pin and one arm curl torsionspring with pen container, when not being subjected to external force, chuck is owing to stretched in the pen container by spring force, chuck, when finger presses folder tail, chuck outwards opens, pack into behind the chalk, unclamp finger, chalk is then clamped by chuck, push rod is equipped with in pen container bottom, can regulate chalk and stretch out or regain.

The beneficial effects of the utility model are: when can conveniently write, chalk dust can not pollute finger.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing is a structural representation of the present utility model.

1. pen containers among the figure, 2. clip, 3. chuck, 4. straight pin, 5. folder tail, 6. one arm curl torsionspring, 7. leather sheath, 8. push rod, 9. chalk.

The specific embodiment

In the accompanying drawings, clip (2) is connected by straight pin (4) with pen container (1), straight pin (4) outside is with one arm curl torsionspring (6), one end of one arm curl torsionspring (6) is stuck on the folder tail (5), the other end is stuck on the pen container (1), when pushing the folder tail (5) of the right and left with thumb and forefinger, chuck (3) outwards ejects, pack into behind the chalk (9), the bottom of chalk (9) is enclosed within the leather sheath (7), can regulate the length of exposing chalk (9) with hand propelled push rod (8), after unclamping thumb and forefinger, chalk (9) is clamped by chuck (3), at this moment just can catch pen container to write.

Claims (2)

1. a chalk tube is made up of pen container, clip, straight pin, one arm curl torsionspring, leather sheath and push rod, it is characterized in that: the chuck face that contacts with chalk is camber.

2. according to the chalk tube under the claim 1, it is characterized in that: with chuck that chalk contacts on antiskid particles is arranged.

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