Novel blackboard eraser
A blackboard eraser, a new type of technology, applied in the field of teaching tools, can solve problems affecting the health of teachers and students, achieve the effect of reducing dust flying, reducing environmental pollution, and reasonable design
Pending Publication Date: 2018-05-18
XIAN AERONAUTICAL UNIV
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Problems solved by technology
[0003] When using a traditional blackboard eraser to wipe the characters on the blackboard, the larger the range and the higher the frequency of waving the eraser, the more obvious the dust will be scattered around, and the nearby teachers and students will unconsciously inhale them into the lungs, which will affect teachers and students over time. health
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.
[0019] see Figure 1 to Figure 4 As shown, this specific embodiment adopts the following technical solutions: a new type of blackboard eraser, including a reverse force block 1, a felt 2, a fixed pin 3, a lever ring bracket 4, a fixing member 5, a hair brush 6, a base plate 7, an annular Rectangular groove 7-1, anti-dust leakage cover 8, the substrate 7 is in the shape of a cuboid, and the outside of the substrate 7 is wrapped with an anti-dust leakage cover 8, and the upper surface of the substrate 7 is along the length and width direction of its outline An annular recta...
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The invention discloses a novel blackboard eraser. The novel blackboard eraser is characterized in that a base plate is of a cuboid shape, the outer portion of the base plate is wrapped with a dust external leakage prevention sleeve, an annular rectangular groove is formed in the upper surface of the base plate along the length-width direction of the contour of the base plate, and a brush is arranged inside the annular rectangular groove; the upper surface of the base plate is bonded with a hair felt through fixing glue, and the hair felt is attached to the brush; and an annular lever supporting frame is arranged on the outer side of the brush, fixing pieces are arrange at the bottoms of the middle parts of every two ends of the annular lever supporting frame in the length direction, and the fixing pieces are connected with the annular lever supporting frame through fixing pins. According to the novel blackboard eraser, the structure is simple in structure, and the design is reasonable; reverse stress blocks swing back and forth along with the wiping directions, so that the annular lever supporting frame is used to open one side of the dust external leakage prevention sleeve, and the other side of the dust external leakage prevention sleeve is tightened; and dust is collected in the dust external leakage prevention sleeve through the mechanical movement, and flying of the dustcan be reduced in the movement process of the eraser, so that the environment-friendly effect is achieved, environmental pollution is reduced, and the physical and psychological health of teachers andstudents is facilitated.
Description
technical field [0001] The invention relates to the technical field of teaching tools, in particular to a novel blackboard eraser. Background technique [0002] The blackboard eraser is a tool that is often used in the school teaching process, especially in class, when it is necessary to erase the writing on the blackboard, it is necessary to use the blackboard eraser. [0003] When using a traditional blackboard eraser to wipe the characters on the blackboard, the greater the range and the higher the frequency of waving the eraser, the more obvious the dust will be scattered around, and nearby teachers and students will unconsciously inhale them into the lungs, which will affect teachers and students over time. health. Therefore, how to deal with the dust generated when the blackboard eraser wipes the blackboard is a thorny problem. Contents of the invention [0004] The object of the present invention is to aim at the defects and deficiencies of the prior art, to provi...
Claims
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CPCB43L21/00
Inventor 杨晓龙刘晓婷段伟勃岳菁菁赵研王曦徐敬国
Owner XIAN AERONAUTICAL UNIV