Student sitting height and table and chair height difference measuring scale
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A measuring ruler and a student's technology, applied in the field of learning aids, can solve the problems of measuring the height difference between tables and chairs, large height growth, irregular sitting and writing postures, etc., and achieve the effects of fast display, convenient use, and simple structure
Pending Publication Date: 2019-06-14
宫景波
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Problems solved by technology
Due to the rapid development of students and the large increase in height, it is impossible to measure the height difference between tables and chairs frequently and quickly, which leads to irregular sitting and writing postures of students, affecting physical development and causing vision problems
Method used
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Embodiment 1
[0026] refer to Figure 1-Figure 4 , Student sitting height and table and chair height difference measuring ruler, including bracket 1, sitting height measuring ruler 2, difference display ruler 3, sitting height measuring chain 4, difference transmission chain 5 and transmission mechanism.
[0027] Support 1 is a rectangular frame, and one side of support 1 is provided with reference rod 6, and the present invention can be placed on the chair surface by reference rod 6, which is convenient for measuring the sitting height of students.
[0028] The sitting height measuring ruler 2 and the difference display ruler 3 are respectively arranged on both sides of the same rectangular frame surface, so that it is convenient for the measurer to check the height difference between tables and chairs. The sitting height measuring ruler 2 is marked with a scale, from 0 cm to 150 cm, which is used to measure the sitting height of the child, and the difference display ruler 3 is marked with...
Embodiment 2
[0034] Others are the same as Embodiment 1, the difference is that: the bracket 1 is respectively provided with a chain centralizing rod 19 for limiting the positions of the sitting height measuring chain 4 and the difference transmission chain 5, and there are two chain centralizing rods 19, which are arranged on the chain respectively. On both sides of the chain, it is convenient to limit the position of the chain and prevent the chain from falling.
[0035] In addition, the difference display ruler 3 and the sitting height measuring ruler 2 are located on the same surface of the support 1, and of course they can also be on different surfaces, which can be changed as required.
[0036] During use, the present invention is placed on the chair surface by the reference bar 6, and the first driving sprocket 9 is rotated by the handle 11, and the first driving sprocket 9 drives the sitting height measurement chain 4 to move, thereby driving the sitting height measurement chain 4 ...
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Abstract
The invention discloses a student sitting height and table and chair height difference measuring scale, which comprises a bracket, a sitting height measuring scale, a difference value display scale, asitting height measurement chain, a difference value transmission chain and a transmission mechanism, wherein one side of the bracket is provided with a reference rod; the starting scale of the sitting height measuring scale corresponds to the position of the reference rod; the sitting height measurement chain is provided with a height spacing rod, and the other side of the height spacing rod isprovided with a sitting height pointer; two ends of the sitting height measurement chain and the difference value transmission chain are independently provided with a driving chain wheel and a drivenchain wheel; the difference value transmission chain is detachably connected with a difference value pointer; the transmission mechanism comprises a pinion coaxial with the driving chain wheel; the pinion is meshed with a gearwheel through an intermediate gear; the gearwheel and the transmission chain wheel are coaxial; the perimeter of the pinion and the perimeter of the intermediate gear are thesame and are 1 / 3 of the perimeter of the gearwheel; and the perimeter of the gearwheel is consistent with the perimeter of the driving chain wheel and the perimeter of the transmission chain wheel. The measuring scale has a simple structure, can quickly display table and chair height differences, does not need to carry out calculation, and is convenient in use.
Description
technical field [0001] The invention relates to a learning aid, in particular to a measuring ruler for the sitting height of students and the height difference between tables and chairs. Background technique [0002] For students, using a reasonable height difference between desks and chairs to adjust the height of desks and chairs can prevent myopia, maintain students' correct sitting and writing postures, and protect students' physical development. [0003] There should be a reasonable height between the student's desk and the chair surface, which is called the height difference between the desk and chair, that is, the normal height difference between the desk and chair is one-third of the student's sitting height, and the height of each person is different. In order to quickly determine The height difference of tables and chairs of each student needs to be measured. When we used to determine the reasonable height difference of tables and chairs for children, we first meas...
Claims
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Application Information
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