Remote laser teaching line drawing machine

Abstract

The invention provides a remote laser teaching line drawing machine. The line drawing machine comprises a transverse sliding cavity. A laser head which is capable of forwards projecting fan-shaped laser is arranged in the middle of the transverse sliding cavity. The front wall of the transverse sliding cavity is a transparent wall where the laser can penetrate. Slidable ferromagnetic light shielding sliding blocks are symmetrically arranged on two sides of the laser head. Electromagnets are symmetrically arranged on two ends of the transverse sliding cavity. The light shielding sliding blocks are connected to the electromagnets through press springs. In the natural state, the press springs allow the light shielding sliding blocks to get close to the two sides of the laser head and at this moment, the fan-shaped angle of an interval allowing the laser to pass between the light shielding sliding blocks is smaller than 1 degree. When the electromagnets are electrified, the electromagnets is oppositely away from each other to reach a limit position, and the fan-shaped angle of the interval allowing the laser to pass between the light shielding sliding blocks is larger than 90 degrees. A handheld part is arranged behind the transverse sliding cavity. A cell and a current adjusting switch of the electromagnets are arranged in the handheld part. According to the invention, remote line drawing can be performed on keywords on a blackboard, so it is easy to well attract students' attentions.

Description

technical field [0001] The invention relates to the field of teaching supplies, in particular to a laser teaching indicating device. Background technique [0002] In the teaching process, in order to point the words on the blackboard, the traditional method is to use a physical pointer, but at present most of them use laser teaching pointers. After being turned on, the laser beam points to the blackboard to indicate the content to be reminded; however, currently The laser teaching pointer can only print a laser point on the blackboard, and does not have the function of marking lines. In fact, in the actual teaching, for important content, such as keywords, formulas, etc., it is usually necessary to draw a line. , so as to attract the attention of students better; and the current laser teaching pointer obviously cannot meet this demand. Contents of the invention [0003] In view of the above problems, the object of the present invention is to provide a remote laser tea...

AI Technical Summary

Problems solved by technology

[0002] In the teaching process, in order to point the words on the blackboard, the traditional method is to use a physical pointer, but at present most of them use laser teaching pointers. After being turned on, the laser beam points to the blackboard to indicate the content to be reminded; however, currently The laser teaching pointer can only print a laser point on the blackboard, and does not have the function of marking lines. In fact, in the actual teaching, for important content, such as keywords, formulas, etc., it is usually necessary to draw a line. , in order to better attract the attention of students; and the current laser teaching pointer obviously cannot meet this demand

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