Expansion and contraction demonstration instrument
A technology of thermal expansion and cold contraction, demonstration instrument, applied in the field of teaching aids, can solve the problems of no teaching aids, poor intuition of teaching with thermal expansion and cold contraction, etc., and achieve the effect of improving hands-on ability
Inactive Publication Date: 2009-12-02
黄正光
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] In the prior art, there are generally no special teaching aids when teaching natural science classes to preschool children and low grade students.
In particular, the teaching of thermal expansion and cold contraction is less intuitive
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0008] Example 1. A thermal expansion and contraction demonstration instrument, which includes a sealed casing 1 and a light emitting device, the light emitting device is composed of a bulb 2, a lamp holder 3, a wire 4 and a plug 5, and the bulb 2 and the lamp holder 3 are arranged in the sealed casing 1, the wire 4 and the plug 5 extend out of the sealed casing 1; the upper part of the sealed casing 1 is provided with an opening, and the opening is sealed with a rubber film 9, and a pointer 8 is fixed on the rubber film 9; the sealed casing 1 is fixedly provided with a bracket 6, and the upper part of the bracket 6 is provided with a graduated indicating plate 7 used in conjunction with the pointer 8.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an expansion and contraction demonstration instrument. The expansion and contraction demonstration instrument is characterized by comprising a sealing shell and a lighting device, wherein the lighting device comprises a bulb, a lamp holder, a lead wire and a plug, the bulb and the lamp holder are arranged on the bottom of the sealing shell, and the lead wire and the plug extend out of the sealing shell; the upper part of the sealing shell is provided with an opening which is sealed by a rubber film, the rubber film is fixedly provided with a pointer, the sealing shell is fixedly provided with a support frame, the upper part of the support frame is provided with an indicating plate with scales, and the indicating plate with scales is matched with the pointer for use. The expansion and contraction demonstration instrument is a teaching aid specially used for expansion and contraction teaching, is applied to natural science subject teaching for preschool children and primary grade students, is vivid and direct, can attract the interests of the students and is also beneficial to enhancing the handling ability of the students.
Description
technical field [0001] The invention relates to a teaching aid, in particular to a thermal expansion and contraction demonstration instrument. Background technique [0002] In the prior art, there are generally no special teaching aids when teaching natural science classes to preschool children and low grade students. In particular, the teaching of thermal expansion and contraction is less intuitive. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a simple in structure, intuitive and vivid thermal expansion and contraction demonstration instrument for the deficiencies of the prior art. [0004] The technical problem to be solved by the present invention is achieved through the following technical solutions. The invention is a thermal expansion and contraction demonstration instrument, which is characterized in that it includes a sealed casing and a light emitting device, the light emitting device is composed of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/06
Inventor 黄正光
Owner 黄正光