The invention discloses a reading and writing desk for primary and secondary schools, which is composed of a desk drawer, a desk base frame and a reading and writing dissuasion device. The bottom of the drawer of the desk is provided with four bolts, opposite to the four nuts on the underframe. The top of the chassis is provided with a square frame, the center gear of the frame is provided with a center gear, the center gear and the nut gear at the top of the table leg are meshed with each other, and the nut gear is driven to rotate synchronously. The outer gear of the nut gear is provided with an internal nut, and the bottom surface is provided with an annular ball track. The table leg is arranged at the four corners of the square frame, and a cylindrical clamping groove is arranged at the top of the table leg, and the lower track of the plane bearing is arranged in the clamping groove. The nut gear is combined with the center gear on the upper end of the table leg to form a plane bearing. It is easy to rotate the nut gear to realize the overall lifting of desk drawers. The inside of the desk drawer is also provided with a reading and writing dissuasion device. The reading and writing dissuasion device is composed of a saucer-shaped pallet, a screw, a nut and a hollow cylinder. The saucer-shaped pallet and a screw are integrated with each other and mesh with each other. The lifting and lifting of the pallet is realized by turning the pallet. The tray can hold the chin of the human body and prevent the eyes from contacting the tabletop too much. The nut and the hollow cylinder are mutually integrated, and the stud stays behind the cylinder after falling down. Using reading and writing desks can effectively adjust the reading and writing posture of primary and secondary school students, prevent teenagers from myopia, and promote the healthy growth of teenagers.
【技术实现步骤摘要】
一种中小学读写课桌
:本专利技术涉及一种中小学适用的读写课桌,在中小学使用这种课桌,可以养成良好的读写习惯,预防近视,促进青少年健康成长。
技术介绍
:儿童是祖国的花朵,青少年是祖国的未来,在全国十四亿人口中,有三亿是儿童和青少年,他们正处在身心发育的关健时期,是学习文化,增长知识的重要阶段,他们有80%时间,是在学校度过,课桌是他们发奋学习和成长的摇篮,是他们学校生活中的主要陪伴,利用课桌养成良好的读写习惯,是预防近视和促进青少年健康成长的重要措施。
技术实现思路
:本专利技术人经过反复研究设计,终于专利技术了一种中小学适用的读写课桌,从而完成了本专利技术。本专利技术方案是在课桌抽屉下方设置一个课桌底架,底架下方四条桌腿和普通桌腿基本相同,不同的是桌腿接触地面后,分别外展到桌面四角正下方,以保障课桌的稳定性。底架顶端设置一个正方形框架,框架对角线相交处上方设置轴承,安装一个可以自由转动的齿轮。框架四角与空心桌腿相对的地方,分别设置一个螺母齿轮,螺母齿轮和中心齿轮互相啮合。螺母齿轮内部设有螺母,和抽屉下方的四根螺柱互相啮合,随意转动内侧面两个螺母齿轮,可以实现课桌抽屉整体升降。抽屉内侧正中,靠近桌面设置一个螺母、螺母下方焊接一个空心圆柱,以桌面和抽屉底为支撑点,固定在抽屉内侧。螺母与桌面相平、螺母上方设置螺柱、螺柱顶端设置碟形托盘。碟形托盘可以随螺柱转动升降。本专利技术结构简单、使用方便、轻转螺母齿轮、可随意升降桌面、调节碟形托盘、可控制下巴高度、使眼睛和桌面保持一定距离。从而养成青少年良好的读写习惯。下面结合附图作进一步说明:附图说明:图1为抽屉底面示意图; ...
【技术保护点】
1.一种中小学读写课桌,由课桌抽屉、课桌底架、读写劝阻器组成。其特征在于:所述的中小学读写课桌,在课桌抽屉和底架之间、设置了具有升降功能的螺柱、螺母齿轮和中心齿轮。螺柱设置在抽屉底面一个正方形框架四角,和课桌底架上螺母齿轮互相啮合,通过转动螺母齿轮、实现抽屉整体升降。螺母齿轮外部设置齿轮、内部设置螺母,下侧设置环形滚珠轨道,和底架上滚珠轨道合成平面轴承,设置在桌腿顶端。桌腿是一个空心圆柱体,顶端固定在正方形框架四角,并设有圆柱形卡槽,用于安装平面轴承下轨道。桌腿底端接触地面后外展至桌面四角正下方,以保证课桌整体平衡。中心齿轮设置在底架中心,和桌腿上方螺母齿轮互相啮合,保障四个螺母齿轮同步运转,实现课桌抽屉整体升降。
【技术特征摘要】
1.一种中小学读写课桌,由课桌抽屉、课桌底架、读写劝阻器组成。其特征在于:所述的中小学读写课桌,在课桌抽屉和底架之间、设置了具有升降功能的螺柱、螺母齿轮和中心齿轮。螺柱设置在抽屉底面一个正方形框架四角,和课桌底架上螺母齿轮互相啮合,通过转动螺母齿轮、实现抽屉整体升降。螺母齿轮外部设置齿轮、内部设置螺母,下侧设置环形滚珠轨道,和底架上滚珠轨道合成平面轴承,设置在桌腿顶端。桌腿是一个空心圆柱体,顶端固定在正方形框架四角,并设有圆柱形卡槽,用于安装平面轴承下轨道。桌腿底端接触地面后外展至桌面四角正下方,以保证课桌整体平衡。中心齿轮设置在底架中心,...
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