CN2792799Y - Chalk for hand protection - Google Patents

Abstract

The utility model relates to a hand protecting chalk, which belongs to the field of cultural and educational supplies. The utility model comprises a piece of chalk, and is characterized in that the hand protecting chalk also comprises a rotary handle, wherein the rotary handle is provided with a fixed sleeve tube, a movable pen container is arranged in the fixed sleeve tube, the bottom of the movable pen container is provided with a hole with inner threads, the central part of the rotary handle is also provided with a top bar with outer threads, the top bar is in threaded connection with the hole which is provided with the inner threads and is arranged at the bottom of the movable pen container, a guiding rail for lifting the movable pen container is also arranged in the fixed sleeve tube and the chalk is arranged in the movable pen container. The utility model has the characteristics of reasonable design, chalk saving, no hand pollution any longer and convenient use, controls the writing length of the chalk so that the chalk is difficult to break and thus makes contribution to save educational funds.

Description

The handguard chalk

Technical field

The utility model relates to a kind of chalk of writing usefulness on blackboard, particularly relates to a kind of handguard chalk with environment-friendly function, is to the improvement of existing chalk structure, belongs to the school supply and stationery category, and suitable teacher uses when classroom instruction.

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, promptly do not meet environmental requirement, be harmful to the healthy of teacher yet.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, and the improvement by to existing chalk structure provides a kind of handguard chalk with environment-friendly function.This novel handguard chalk adopts the spiral lifting principle, be put in the liftable movable pen container chalk fixing, along with the screw between movable pen container and fixed sleeving, chalk can rise to fall and be difficult for fractureing again, and hand-held housing place when using simultaneously no longer directly contacts chalk, both prevented chalk dust adversary's pollution, be easy to carry again, but also the length of control chalk when writing, thereby contribution made for saving education funds.

The technical scheme that the utility model provides is: this handguard chalk, include a chalk, be characterized in also including in the described handguard chalk swing handle, swing handle is provided with fixed sleeving, be provided with movable pen container in the fixed sleeving, a tapped hole is arranged at movable pen container bottom, the swing handle central part also is provided with is with externally threaded top thick stick, this top thick stick is connected with tapped hole, movable pen container bottom spiral, also be provided with guide rail in the fixed sleeving, in this activity pen container chalk be housed for movable pen container lifting.

Compared with prior art, the beneficial effects of the utility model are: have reasonable in design, saving chalk, no longer dirty hand and characteristics easy to use, but also the length of controlled imperial decree chalk when writing makes it to be not easy to fracture, thereby made contribution for saving education funds.

Description of drawings

Accompanying drawing is the structural representation that the utility model provides embodiment.

Number in the figure: 1. swing handle, 2. fixed sleeving, 3. movable pen container, 4. chalk.

The specific embodiment

As shown in the figure, this handguard chalk, include a chalk 4, also include a swing handle 1, swing handle 1 is provided with fixed sleeving 2, be provided with movable pen container 3 in the fixed sleeving 2, a tapped hole is arranged at movable pen container 3 bottoms, and swing handle 1 central part also is provided with is with externally threaded top thick stick, and this top thick stick is connected with tapped hole, movable pen container 3 bottoms spiral, be provided with guide rail in the fixed sleeving 2, in the movable pen container 3 chalk 4 be housed for movable pen container 3 liftings.

During use, rotatable swing handle 1, the movable pen container 3 of top thick stick jack-up rises along the guide rail in the fixed sleeving 2, the user can according to circumstances regulate the length of chalk 4, how long the shell place of hand-held fixed sleeving 2 during owing to use need be exposed with how long just rotating swing handle 1, allow the chalk 4 that is inserted in the movable pen container 3, avoid hand directly to contact chalk 4, also just prevented chalk dust adversary's pollution.

Claims (1)

1. handguard chalk, include a chalk, it is characterized in that also including in the described handguard chalk swing handle, swing handle is provided with fixed sleeving, is provided with movable pen container in the fixed sleeving, and a tapped hole is arranged at movable pen container bottom, the swing handle central part also is provided with is with externally threaded top thick stick, this top thick stick is connected with tapped hole, movable pen container bottom spiral, also is provided with the guide rail for movable pen container lifting in the fixed sleeving, in this activity pen container chalk is housed.

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