Elevation-type teaching writing blackboard

Abstract

The invention discloses an elevation-type teaching writing blackboard which comprises sliding grooves, an outer frame, a sleeve, a sliding rod, a blackboard body, a base supporting plate and a bottom plate. The blackboard body is fixed in the middle of the outer frame. The sliding grooves are installed in the inner sides of the outer frame. The sliding grooves are formed in the upper end and the lower end of the blackboard body correspondingly. The upper end and the lower end of the sliding rod are fixedly arranged in the sliding grooves in a clamped manner. The sleeve is arranged on the outer side of the sliding rod in a sleeving manner. Four chalk clamps and a handle are installed on the sleeve. The bottom of the outer frame is fixedly arranged on the base supporting plate. A shear fork type elevation frame is fixedly installed between the base supporting plate and the bottom plate. Telescopic supporting rods are fixedly installed between four corners of the bottom supporting plate and four corners of the bottom plate. The blackboard is convenient to use, the working efficiency is improved, workloads of teachers are reduced, line drawing is standard, and the blackboard contributes to teaching, is good in height adjusting effect and has high operability and practicality.

Description

technical field [0001] The invention relates to a learning writing blackboard, in particular to a lifting type teaching writing blackboard. Background technique [0002] In English teaching, in order to make letter writing more standardized, the teacher usually draws four lines and three grids on the blackboard, and when drawing four lines and three grids, the teacher will use a ruler to draw one horizontal line and one horizontal line, so that not only It is cumbersome, and the parallelism of the drawn horizontal lines cannot be guaranteed, and the distance between the four horizontal lines is not easy to grasp. The drawn four lines and three grids are not standard, which is not conducive to standard writing, and it is extremely inconvenient to use. There are four lines and three grids. If the grid parallelism and the distance between lines are not standard, the labor intensity of the teacher during teaching will be high, and the teaching efficiency will be low. Contents ...

AI Technical Summary

Problems solved by technology

[0002] In English teaching, in order to make letter writing more standardized, the teacher usually draws four lines and three grids on the blackboard, and when drawing four lines and three grids, the teacher will use a ruler to draw one horizontal line and one horizontal line, so that not only It is cumbersome, and the parallelism of the drawn horizontal lines cannot be guaranteed, and the distance between the four horizontal lines is not easy to grasp. The drawn four lines and three grids are not standard, which is not conducive to standard writing, and it is extremely inconvenient to use. There are four lines and three grids. If the grid parallelism and the distance between lines are not standard, the labor intensity of the teacher in teaching is high, and the teaching efficiency is low

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