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Flexibly drawn straight line three-side projection demonstration board

A projection board and projection technology, which is applied in the field of teaching and demonstration teaching aids, can solve the problems of inconvenience, occupation, and long time in carrying, moving and hanging, and achieve the effect of improving the dynamic demonstration effect.

Active Publication Date: 2016-08-03
GUANGZHOU HUALI SCI & TECH VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If physical model teaching aids are used, each teaching aid is fixed, and its disadvantage is that it is bulky, and it is inconvenient to carry, carry, move and hang. If it is used to draw its three-sided projection on the blackboard, it will take more time. , takes up a lot of space on the blackboard, and the dynamic demonstration effect is not good

Method used

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  • Flexibly drawn straight line three-side projection demonstration board
  • Flexibly drawn straight line three-side projection demonstration board
  • Flexibly drawn straight line three-side projection demonstration board

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Embodiment Construction

[0027] Figure 1 to Figure 5 and Figure 7 , represents the overall structure composition of the present invention and the connection and positional relationship of parts, and is also an embodiment of oblique lines.

[0028] Figure 6 Indicates the connection and positional relationship between the composition of the moving point and the components.

[0029] Figure 8 Indicates the structural composition of the linear projection mechanism and the connection and positional relationship of the components.

[0030] Figure 9 Indicates the connection and positional relationship of fixed-point construction components and components.

[0031] exist Figure 1 to Figure 9 Among them, the flexible traction linear three-sided projection demonstration board includes a projection board 1, a projection connection mechanism, and a linear projection mechanism.

[0032] The linear three-sided projection demonstration board with flexible traction includes a projection board 1, a project...

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Abstract

The invention provides a flexibly drawn straight line three-side projection demonstration board which is composed of a projection board body, a projection connection line mechanism and a straight line projection mechanism; by means of the projection connection line mechanism driven by a flexible rope, it is guaranteed that the connection line of a front projection and a horizontal projection of straight line movable points is perpendicular to the X axis, and it is guaranteed that the front projection and the side projection of the straight line movable points are perpendicular to the Z axis; the stretching and contracting straight line projection mechanism is adopted, the projection length of the straight line can be changed, and various position situations of the spatial straight line are met; with scales and numerical values arranged on a translation frame as reference, the distance between the horizontal projection of the movable points and the X axis is equal to the distance between the side projection and Z axis; when the flexibly drawn straight line three-side projection demonstration board is utilized, three projection caps of the movable points are screwed loosely with hands, and the projection caps are screwed tightly after the three projections of the movable points are moved to the designated positions. A dynamic changeable object teaching aid replaces seven unchanged teaching aids, and the dynamic demonstration effect is remarkably improved.

Description

technical field [0001] The invention relates to teaching and demonstration teaching aids, in particular to a flexible traction linear three-sided projection demonstration board used in engineering drawing courses. Background technique [0002] In the engineering drawing course, the spatial position of the straight line is determined by the projection on the three projection planes, that is, the front projection, horizontal projection and side projection of the straight line. The straight line is represented by a straight line segment containing two endpoints, and the same The connection line between the front projection and the horizontal projection of the endpoint is vertical to the X axis, and the connection line between the front projection and the side projection is vertical to the Z axis. The distance from the horizontal projection to the X axis is equal to the distance from the side projection to the Z axis. There are seven situations for the position of the space line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B25/02
CPCG09B25/02
Inventor 王统孙千航孙学雁郭辉
Owner GUANGZHOU HUALI SCI & TECH VOCATIONAL COLLEGE
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