Hand warming chalk holder for teaching

Abstract

The invention relates to the technical field of teaching appliances, in particular to a hand warming chalk holder for teaching. The hand warming chalk holder comprises a clamping rod and an adjustingrod. The clamping rod and the adjusting rod are each of a hollow structure. A first locking device used for clamping chalk is arranged at one end of the clamping rod, and the other end of the clampingrod is arranged in the adjusting rod in a sleeved manner. A second locking device is arranged on the adjusting rod. The clamping rod is movably connected with the adjusting rod through the second locking device. The outer portion of the adjusting rod is sleeved with a protection sleeve. A heating device is arranged in the protection sleeve. The hand warming chalk holder is simple in structure, the use cost is reduced, popularization is easy, and good practicality is achieved. Through the arrangement of the heating device, when the air temperature is low, the hand warming chalk holder can be heated, and therefore the hands are not prone to being frozen, and the experience degree of users is increased. During use, direct contact of fingers and the chalk during use is avoided, cleanliness and sanitation during use are kept, and surrounding objects are not prone to being contaminated. The structure of the hand warming chalk holder is adjustable, and different teaching requirements can bemet.

Description

technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a hand warming chalk holder for teaching. Background technique [0002] Chalk is a common article used by school teachers to write on blackboards. Now, the chalks used in China mainly include ordinary chalk and dust-free chalk. The main components are calcium carbonate and calcium sulfate, or contain a small amount of calcium oxide. Teachers often need to write and draw on the blackboard to explain. When writing, finger directly contacts with chalk, often after a class, hands are full of white powder, which pollutes hands and is unfavorable to people's health. [0003] And when teachers are teaching, they often need to use chalk to write on the blackboard, turn over the book, or perform other operations. After writing with chalk, the hand holding the chalk will be stained with a lot of dust, and there is no clean room in the classroom. environment, when doing other ...

AI Technical Summary

Problems solved by technology

When writing, the fingers are in direct contact with the chalk, and often the hands are covered with white powder after a class, which pollutes the hands and is harmful to people's health

[0003] And when teachers are teaching, they often need to use chalk to write on the blackboard, turn over the book, or perform other operations. After writing with chalk, the hand holding the chalk will be stained with a lot of dust, and there is no clean room in the classroom. environment, so that when other operations are performed, books, teaching aids or clothes and other items will be stained and cause inconvenience

Especially in the painting class, it is inconvenient to use chalk by hand, and it is often necessary to draw on places that cannot be reached on the blackboard. If you only hold chalk, it is more difficult

Images