首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
旋转式自动擦拭无尘黑板
摘要
旋转式自动擦拭无尘黑板是一种不用教师学生自动手擦拭又没有污染的教学用具。它有黑板箱(1)和安装在黑板箱前面的黑板带(2)组成,黑板带安装在箱内的上旋转轴(7)和下旋转轴(13)上,上旋转轴由电机(8)带动旋转,从而使黑板带也跟着旋转,而在箱内黑板带后有一长条形黑板刷(16),这样写过的黑板带一经转入箱内,所写字迹即被刷去,而刷黑板的过程是黑板箱内完成的,粉笔灰不会飞入教室污染环境。
申请公布号
CN2258458Y
申请公布日期
1997.07.30
申请号
CN96210973.8
申请日期
1996.05.03
申请人
顾正武
发明人
顾正武
分类号
B43L1/08
主分类号
B43L1/08
代理机构
代理人
主权项
1、旋转式自动擦拭无尘黑板,其特征是该用具有黑板箱(1)和安装在黑板箱前面中空处的黑板带(2),黑板带套在黑板箱内上旋转轴(7)和下旋转轴(13)上并由黑板带抵板(9)抵住,而在黑板箱(1)内壁上装有一长条形紧挨黑板带(2)位于下旋转轴(13)处的黑板刷(16),粉笔写过的黑板带由于电机(8)带动上旋转轴(7)转动而被转入箱内,当转过黑板箱内壁上装有紧挨下旋转轴(13)处的黑板刷时粉笔灰即被刷去。
地址
650211云南省昆明市第十七中学
您可能感兴趣的专利
APPARATUS FOR DISPENSING A PLURALITY OF MATERIALS SIMULTANEOUSLY
POLARIZATION DIVERSITY LOOP ANTENNA
QUARTER WAVE-LENGTH RING ANTENNA
REDUNDANT INTEGRATOR SYSTEMS
MAGNETIC DISK PACKS
ERROR CONTROL SYSTEM
RETAINER FOR ELECTRIC CORD CONNECTORS
CIRCUIT BREAKER WITH SEALING MEANS AT HANDLE-OPENING
ELECTRONIC INTEGRATION APPARATUS
CONTROL CIRCUIT FOR ALTERNATING CURRENT AND DIRECT CURRENT LOADS AND WITH ZERO TURN-ON AND ZERO TURN-OFF
VARIABLE DYNAMIC DIRECT-CURRENT BRAKE CIRCUIT FOR A.C. MOTOR
SELF-HEALING CAPACITOR ASSEMBLY
GAP TUNED REFLEX KLYSTRON HAVING AN ENLARGED MOVABLE DIAPHRAGM DISPOSED IN R.F. ISOLATION WITH RESPECT TO THE R.F. CAVITY
STANDARDIZED HIGH-DENSITY INTEGRATED CIRCUIT ARRANGEMENT AND METHOD
CONTROLLED IMPEDANCE ANALOG MULTIPLIER CIRCUIT IN WHICH A DIFFERENTIAL AMPLIFIER OUTPUT DRIVES A FIELD EFFECT TRANSISTOR
METHOD AND ARRANGEMENT FOR PERIODICALLY CONNECTING AND DISCONNECTING A HEATING UNIT
SYSTEM OF PROGRAM CONTROL OF FEEDS DRIVE IN ELECTROEROSION GOUGING MACHINES
APPARATUS FOR CONTROL OF SEIZURE OF CENTRAL IDENTIFICATION APPARATUS OF A TELEPHONE PBX SYSTEM
Roller-Equipped Straightening Machine
Level Recording Devices