CN2195448Y

CN2195448Y - Double-side rotary non-dust blackboard

Info

Publication number: CN2195448Y
Application number: CN 94225672
Authority: CN
Inventors: 张东
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-28
Filing date: 1994-01-28
Publication date: 1995-04-26
Anticipated expiration: 2004-01-28

Abstract

The utility model relates to a double-face rotary dustless blackboard. The blackboard face of the blackboard is provided with a front face and a back face which are fixed on a supporting stand; the back of the blackboard is provided with an enclosed box. The double-face blackboard can rotate on a shaft which is installed in the middle part. The inner part of the enclosed box is provided with a cuboid eraser device which is composed of an eraser, a pushing device, a slide device, a pull rope, a pull rod, etc. The eraser device can erase the blackboard with words in the enclosed box; consequently, the eraser device keeps the air clean in the classroom. The utility model is particularly suitable for popularization in lecture theaters and other teaching places of college and middle schools.

Description

Double-side rotary non-dust blackboard

The utility model belongs to teaching equipment, relates generally to the dustproof design of writing on the blackboard with blackboard.

Blackboard for education in the general classroom is made up of blackboard surface and framework, or is fixed on the wall, or is supported in ground by bracing frame.In order to reduce the time of erasing the board, a lot of theatres have been equipped with two lift blackboards that blackboard surface is formed.These blackboards all need with the direct wiping of staff, thereby cause dust from flying, pollute teaching environment.Now on the market or interrelated data though the report of dust-free chalk or dust absorption blackboard eraser is arranged because its price is higher, it is convenient inadequately to use, or dust removing effects is bad only has the only a few classroom to use, numerous teachers and students still unavoidably will be subjected to the hardship of sucking chalk powder dirt.

The purpose of this utility model is that the blackboard that a kind of energy of design will be write full letter written with chalk is cleaned in sealing feather cockscomb body, thereby prevents dust from flying, keeps the dust protected blackboard of classroom air cleaning.

The purpose of this utility model is achieved in that this blackboard is made up of blackboard surface and blackboard frame, and blackboard surface is positive and negative two sides, and Dual-side blackboard is supported on the ground by bracing frame, and the back of Dual-side blackboard is the feather cockscomb body of a sealing.This Dual-side blackboard is rotary, promptly is being provided with rotating shaft in the middle part of two munnions of Dual-side blackboard and between the bracing frame, and wherein the rotating shaft of a side is provided with swing handle, can handle Dual-side blackboard and rotate in sealing feather cockscomb body.Blackboard surface one side in sealing feather cockscomb body is provided with blackboard eraser mechanism, blackboard eraser mechanism comprise one with the same long cuboid blackboard eraser of blackboard, fixedly fixed cross beam, the fixed cross beam both sides of cuboid blackboard eraser slide mass, can make that slide mass slides within it be fixed in the slip vertical slot on the bracing frame, the pulling rope of pulling cuboid blackboard eraser, be fixed in two pulleys that make the pulling rope slip of bracing frame both sides and connect the pulling hand lever that spurs rope.On the fixed cross beam and be provided with the blackboard eraser holding device, make the cuboid blackboard eraser closely contact blackboard surface and finish wiping action.

This two-sided Rotary Blackboard like this, drives the motion of cuboid blackboard eraser at the pulling hand lever because the blackboard eraser mechanism at the blackboard back side is positioned at sealing feather cockscomb body, and during blackboard wiping, dust drops in the sealing feather cockscomb fully, thus the cleaning that has kept classroom environment.Simultaneously,, increased write area, and blackboard eraser is long and big, spur and severally just can clean off a blackboard down, like this, also saved the time of erasing the board because blackboard surface is two-sided, to teaching with more convenience.Therefore, this two-sided rotation dust-free blackboard suits to promote the use of in the classroom of all kinds of schools very much.

Description of drawings.

Fig. 1 is the schematic diagram of two-sided rotation dust-free blackboard

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is that the B of Fig. 2 is to partial view.

Below in conjunction with accompanying drawing an embodiment of the present utility model is described in detail.The front and back blackboard surface 1 of this two-sided rotation dust-free blackboard is a Glass blackboard, totally four of front and back, two is 1.5 * 1.1 * 0.005m, two is 1.45 * 1.1 * 0.005m in addition, dress up the Dual-side blackboard of 2.95 * 1.1 * 0.005m by length overall 2.95m, the framework 2 of assembling blackboard is the 40# equal angle iron, fills out between the Glass blackboard framework with batten, rubber skin, and fixes with wood screw.For making cuboid blackboard eraser 8 when descending the swiping word, can slip over the blackboard lower frame smoothly, lower frame is not given prominence to outside Glass blackboard, fixing of lower frame and blackboard, available batten, angle bar are held blackboard in the bottom, batten, angle bar edge are concordant with the Glass blackboard outerplanar, are converted into the L type with the thick small iron plate of 2mm again, and an end is pressed between batten, the angle bar, the other end exceeds batten 5-10mm shelves and lives Glass blackboard, and is fixed on the batten with wood screw.Whole double-sided glass blackboard is supported on the ground by bracing frame 4, and bracing frame 3 is made by the 40# equal angle iron.The sealing feather cockscomb body of Dual-side blackboard back, blackboard surface and wall respectively are the one side of feather cockscomb body, and all the other four sides are made by fiberboard.The middle part that in double-sided glass blackboard both sides is the high frame of 1.1m respectively is welded with a rotating shaft 4, Dual-side blackboard can be rotated around its center line, be connected with swing handle 5 in one of them rotating shaft, swing handle 5 is provided with steady pin 6, the corresponding site of its bracing frame is provided with fixed pin holes 7, can blackboard surface upset back is fixing.303 rolling bearings are assembled in two rotating shafts, and bearing block is a pipe, and along opening, Lower Half is welded on the bracing frame along axis, and the first half is welded on the framework, and the first half is connected on the edge flat board with bolt with Lower Half.Cuboid blackboard eraser 8 in the sealing feather cockscomb body is about 2.82m, wide about 0.15m, be wood end hairbrush blackboard eraser, the cuboid blackboard eraser is fixed on the fixed cross beam 9, fixed cross beam 9 usefulness 40# angle bar are made, fixed cross beam 9 two ends are respectively by one group of rolling element (as shown in Figure 3) of being made up of 203 bearings of with closure, and each is organized 203 bearings and slides in the vertical slot that is welded in the bracing frame back side, and vertical slot is welded into relatively with two 20# angle bar.Lean on each 0.3m place, two ends at fixed cross beam, one holding device 10 is respectively arranged, it comprises the little pipe that is welded in fixed cross beam, and its diameter is less than 30mm, long 200mm, pipe one end opening, the other end is shut, but has the internal thread hole of M10, fixes the little pipe that shut a small column or an outer end at the corresponding site of cuboid blackboard eraser 8, and insert respectively in the pipe on the fixed cross beam, in the internal thread hole of pipe, make the cuboid blackboard eraser closely contact the Glass blackboard face with puller bolt.Fasten the pulling rope at the fixed cross beam two ends, and make two pulleys of pulling rope, be connected in then on the pulling hand lever 11 of two-sided Rotary Blackboard front by both sides, Dual-side blackboard bracing frame top.On Glass blackboard, write full word, in the time of need wiping, at first spur swing handle, the one side of writing full word is turned in the sealing feather cockscomb body, and fixes, then both hands tension pulling hand lever with fixing pin, just can drive the cuboid blackboard eraser moves upward, carry out wiping action, blackboard eraser rises to the top, decontrols the pulling hand lever, blackboard eraser just can rely on self gravitation (about 90 newton) to glide, carry out wiping again, so repeatedly, just can clean writing, again because these work are to carry out in the feather cockscomb body of sealing, therefore, it can eliminate the pollution of dust to the classroom air fully, and makes the work that erases the board simple and light.

Claims

1, a kind of two-sided Rotary Blackboard, form by blackboard surface and blackboard frame, it is characterized in that blackboard surface 1 is for just, anti-two sides, Dual-side blackboard is fixed on the bracing frame 3, there is a sealing feather cockscomb body Dual-side blackboard back, 2 liang of munnion middle parts of blackboard frame are provided with rotating shaft 4, and be connected with bracing frame, one side rotating shaft 4 is connected with swing handle 5, steady pin 6 is arranged on the swing handle, the corresponding site of bracing frame has fixed pin holes 7, be provided with blackboard eraser mechanism in the sealing feather cockscomb body, blackboard eraser mechanism is by cuboid blackboard eraser 8, fixed cross beam 9, the rolling element of fixed cross beam both sides and be arranged at slip vertical slot on the bracing frame, the pulling rope, pulley on the bracing frame and pulling hand lever 11 are formed, and fixed cross beam and blackboard eraser are provided with holding device 10.

2, two-sided Rotary Blackboard as claimed in claim 1 is characterized in that the sealing feather cockscomb body of described two-sided Rotary Blackboard back simultaneously is the feather cockscomb body, and one side is a blackboard surface, and all the other are made for fiberboard on four sides.

3, two-sided Rotary Blackboard as claimed in claim 1, the rotating shaft 4 assembling rolling bearings that it is characterized in that described blackboard frame 2 both sides, bearing block is made up of with the semicircle pipe that is welded on the framework 2 the semicircle pipe that is welded on the bracing frame 3, and two halves pipe both sides all are welded with flat board, sentences bolt at flat board and connects.

4, two-sided Rotary Blackboard as claimed in claim 1 is characterized in that on the swing handle 5 in the described side rotating shaft steady pin 6 being arranged, and the corresponding site of its bracing frame is provided with fixed pin holes 7.

5, two-sided Rotary Blackboard as claimed in claim 1, the rolling element that it is characterized in that 9 two of described fixed cross beams is the rolling bearing of 4 with closures, every side has 2.

6, two-sided Rotary Blackboard as claimed in claim 1 is characterized in that the slip vertical slot on the described bracing frame is welded into by two angle bar that are welded in the bracing frame back side.

7, two-sided Rotary Blackboard as claimed in claim 1, it is characterized in that described blackboard eraser holding device 10 is made up of the pipe that an end opening other end that is fixed in little pipe that the blackboard eraser back side one end shuts, is welded in the fixed cross beam corresponding site has internal thread hole, pipe on the blackboard eraser inserts in the crossbeam pipe, and holds out against blackboard eraser with puller bolt by internal thread hole.

8, two-sided Rotary Blackboard as claimed in claim 1; it is characterized in that described two sides blackboard panel 1 is made of four Glass blackboard faces; blackboard framework 2 usefulness 40# or 36# equal angle iron are made, and are fixed by batten, rubber and wood screw between Glass blackboard face and the angle iron frame.

9, as claim 1 or 8 described two-sided Rotary Blackboards, the lower limb framework of blackboard that it is characterized in that being positioned at sealing feather cockscomb body is concordant with blackboard surface, blackboard surface is held with batten and frame, use the small iron plate of the thick 2mm of L type again, one end is pressed between batten and the frame angle bar, fixes with wood screw, and the other end exceeds batten 5-10mm, shelves are lived blackboard, and are fixed on the batten with wood screw.