The utility model relates to a push-pull blackboard eraser, which comprises an upper sliding rail, a lower sliding rail, a sliding bar, a plate eraser and a handle; the upper sliding rail and the lower sliding rail are all provided with grooves; the sliding bars are provided with sliding structures at both ends; the sliding structures are embedded in the grooves of the upper and lower sliding rails; and the sliding bars are in an \I\ shape with the upper and lower sliding rails; The outer widths of the board rubbing are the same as the inner widths of the hollow parts of the sliding bar, and the outer widths of the left and right sides are provided with rubber strips. The board rubbing is of a square structure and the cross section is \H\ shaped. One side of the board rubbing is a brush and the other side is a felt. The brush and the outer side of the board rubbing are made of rubber strips. The thickness of felt is greater than the thickness of eraser square. The utility model can realize convenient, fast and labor-saving erasing of blackboard handwriting and is provided with a brush and felt, which can be used for both dry and wet purposes. The blackboard eraser is convenient and fast for disassembly, reversal and installation, has simple structure, reasonable design, convenient realization and convenient for popularization and application.
【技术实现步骤摘要】
一种推拉式黑板擦
本技术属于教学器具领域,尤其涉及一种推拉式黑板擦。
技术介绍
目前,黑板是在教学中广泛使用的一种教学辅助工具。在日常教学应用中黑板分为两种,一种是一块长板固定在墙上;另外一种则是采用多块长板组合成一整块黑板,长板之间可以在黑板的边框上滑移;但无论是哪种黑板,在黑板面上大面积写上字迹后,需要将其擦除才能再次使用。目前黑板的擦除方法比较单一,通常是利用黑板擦进行擦除。如果黑板上只有少量字迹,则较为简单;但是如果黑板上有大面积字迹时,此种擦除方式需要擦除者大幅度地纵向和横向挥舞手臂,不仅费时费力,另外,采用黑板擦擦除的形式,位于黑板上边沿位置的字迹,如果擦除者身高不够,则较难擦除。
技术实现思路
本技术的目的在于针对现有技术的不足,提供一种能够方便、快速、省力的擦除黑板字迹并且可干湿两用的推拉式黑板擦。本技术为实现上述目的采用的技术方案是:一种推拉式黑板擦,包括上滑轨、下滑轨、滑杠、板擦、手柄;所述上滑轨、下滑轨分别平行装于黑板上下两边,所述上滑轨、下滑轨均内有凹槽;所述滑杠两端设置有滑动结构,所述滑动结构嵌于上、下滑轨的凹槽内,滑杠与上、下滑轨呈“工”字形;所述滑杠为扁平中空结构,左右两边内侧设置有毛毡条;所述板擦的外部宽度与滑杠的中空部分内侧宽度相同且左右两边外侧设置有橡胶条,所述板擦为方框结构且横截面为“H”形,板擦的一面为毛刷、另一面为毛毡,所述毛刷、毛毡的厚度均大于板擦方框厚度,板擦上下两端沿中轴线各设有一个手柄插孔,所述手柄上下两端沿中轴线各设有一个手柄插头;进一步地,所述毛刷、毛毡均为可拆卸;进一步地,所述滑动结构为滚轮或滚珠;进一步地, ...
【技术保护点】
1.一种推拉式黑板擦,其特征在于,包括上滑轨、下滑轨、滑杠、板擦、手柄;所述上滑轨、下滑轨分别平行装于黑板上下两边,所述上滑轨、下滑轨均内有凹槽;所述滑杠两端设置有滑动结构,所述滑动结构嵌于上、下滑轨的凹槽内,滑杠与上、下滑轨呈“工”字形;所述滑杠为扁平中空结构,左右两边内侧设置有毛毡条;所述板擦的外部宽度与滑杠的中空部分内侧宽度相同且左右两边外侧设置有橡胶条,所述板擦为方框结构且横截面为“H”形,板擦的一面为毛刷、另一面为毛毡,所述毛刷、毛毡的厚度均大于板擦方框厚度,板擦上下两端沿中轴线各设有一个手柄插孔,所述手柄上下两端沿中轴线各设有一个手柄插头。
【技术特征摘要】
1.一种推拉式黑板擦,其特征在于,包括上滑轨、下滑轨、滑杠、板擦、手柄;所述上滑轨、下滑轨分别平行装于黑板上下两边,所述上滑轨、下滑轨均内有凹槽;所述滑杠两端设置有滑动结构,所述滑动结构嵌于上、下滑轨的凹槽内,滑杠与上、下滑轨呈“工”字形;所述滑杠为扁平中空结构,左右两边内侧设置有毛毡条;所述板擦的外部宽度与滑杠的中空部分内侧宽度相同且左右两边外侧设置有橡胶条,所述板擦为方框结构且横截面为“H”形,...
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