Extendable Tablet Rack

Abstract

The invention provides a stretchable drawing board bracket, comprising a fixed bottom bracket, a ratchet wheel mechanism, a rotary bracket, a first supporting bracket and a second supporting bracket, wherein the ratchet wheel mechanism is fixedly arranged on the fixed bottom bracket; the rotary bracket is connected with the fixed bottom bracket through the ratchet wheel mechanism; the rotary bracket can be used for adjusting an included angle between the rotary bracket and the fixed bottom bracket through the ratchet wheel mechanism; the first supporting bracket is arranged on the rotary bracket, and rotates together with the rotary bracket; the distance between the first supporting bracket and the rotary bracket can be adjusted; the second supporting bracket is connected with the fixed bottom bracket; the distance between the second supporting bracket and the fixed bottom bracket can be adjusted. The stretchable drawing board bracket provided by the invention is simple in structure, is convenient to use, and can be used on most desks; according to the stretchable drawing board, the problem that drawing desks are insufficient to use due to the fact that drawing classes are more in a school is effectively solved.

Description

technical field [0001] The invention relates to the field of teaching aids, in particular to a retractable drawing board frame. Background technique [0002] The existing drawing shelf and the table are fixed together, and the size of the shelf is fixed and cannot be stretched, which determines that a drawing table can only be used for one drawing board, and the drawing table is uniformly placed in a classroom , The number of drawing classrooms is also limited. When there are more drawing classes in the school, the drawing classrooms are not enough, which brings inconvenience to students' drawing. Contents of the invention [0003] In order to overcome at least one problem existing in the prior art, the present invention proposes a retractable drawing board frame with simple structure and convenient use. [0004] In order to achieve the above object, the present invention proposes a telescopic drawing frame, comprising: a fixed chassis; a ratchet mechanism fixedly arrange...

AI Technical Summary

Problems solved by technology

[0002] The existing drawing shelf and the table are fixed together, and the size of the shelf is fixed and cannot be stretched, which determines that a drawing table can only be used for one drawing board, and the drawing table is uniformly placed in a classroom , the number of drawing classrooms is also limited. When there are many drawing classes in the school, the drawing classrooms are not enough, which brings inconvenience to students' drawing

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