CN2468753Y

CN2468753Y - Electric black board with screen

Info

Publication number: CN2468753Y
Application number: CN 01216606
Authority: CN
Inventors: 陈继勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-27
Filing date: 2001-02-27
Publication date: 2002-01-02
Anticipated expiration: 2011-02-27

Abstract

The utility model relates to an electrical blackboard with screen. Internally fixed with a low-speed motor(1), the housing(2) supports a driving gear(4), a driven gear(6) and a screen roll(10) separately. A flexible blackboard(5) is inlaid so as to circle around the driving gear(4) and the driven gear(6). A conveyer belt(3) is connected with a low speed motor(1) and the driving gear(4). A brush(7) is connected with a side of a backward spring(9) with the other side fixed on the housing(2) and corresponds to an electromagnet(8). One side of the screen(12) is fixed on the screen roll(10), while the other side is fixed on the screen slide frame(13) which is embedded in slideway of the housing(2).

Description

A kind of band screen driven blackboard

The utility model relates to a kind of band screen driven blackboard technical field.

At present the various blackboards that use in use have the problem of the following aspects: when finishing using wiping, dust from flying has a strong impact on the sanitation and hygiene in teachers and students' healthy and classroom; Space of a whole page capacity is little, use up a space of a whole page on the classroom after, have to a part of space of a whole page content is wiped, be unfavorable for the classroom brief summary; The wiping process manually-operated, wasting time and energy has increased teachers and students' burden; When the need projection screen, fall screen from the blackboard top, influenced the use of blackboard.

The purpose of this utility model is a kind of band screen driven blackboard of design, rotates by the driven by motor flexible blackboard, and, when the need screen prjection is imparted knowledge to students, screen can be pulled out by the automatic wiping of blackboard eraser, and time spent automatic drawing back not, thus overcome above-mentioned all shortcomings.

The utility model is achieved in that and is fixed with slowspeed machine 1 in the housing 2, housing 2 is supporting drive sprocket axle 4 respectively, follower shaft 6 and screen reel 10, flexible blackboard 5 embeds on drive sprocket axle 4 and follower shaft 6, connect by conveyer belt 3 between slowspeed machine 1 and the drive sprocket axle 4, blackboard eraser 7 is connecting back-moving spring 9 one ends, and it is corresponding with electromagnet 8, the back-moving spring other end is fixed on the housing 2, screen 12 1 ends are fixed on the screen reel 10, its other end is fixed on the screen sliding sash 13, this frame 13 is inserted in the slideway of housing 2, and locator card 14 1 ends can embed in the lower frame of screen sliding sash 13, and the locator card other end is fixed on outside the housing 2.

The utility model has the advantages that: help teacher's writing on the blackboard and classroom brief summary more than one times owing to adopted flexible blackboard that the blackboard area has been increased, the sealing Automatic erasing blackboard has been stopped dust from flying, improved classroom environment, help the healthy of teachers and students, the setting of projection screen can be carried out electronic teaching and black board teaching simultaneously and improve efficient on class.

Below in conjunction with accompanying drawing, the utility model is described further with embodiment:

This accompanying drawing is the utility model structural representation.

In the accompanying drawing: 1, slowspeed machine, 2, housing, 3, conveyer belt, 4, drive sprocket axle, 5, flexible blackboard, 6, follower shaft, 7, blackboard eraser, 8, electromagnet, 9, back-moving spring, 10, the screen reel, 11, reel back-moving spring, 12, screen, 13, the screen sliding sash, 14, locator card.

Be fixed with slowspeed machine 1 in the housing 2, housing 2 is supporting drive sprocket axle 4 respectively, follower shaft 6 and screen reel 10, flexible blackboard 5 embeds on drive sprocket axle 4 and follower shaft 6, connect by conveyer belt 3 between slowspeed machine 1 and the drive sprocket axle 4, blackboard eraser 7 is connecting back-moving spring 9 one ends, and it is corresponding with electromagnet 8, the back-moving spring other end is fixed on the housing 2, screen 12 1 ends are fixed on the screen reel 10, its other end is fixed on the screen sliding sash 13, this frame 13 is inserted in the slideway of housing 2, and locator card 14 1 ends can embed in the lower frame of screen sliding sash 13, and the locator card other end is fixed on outside the housing 2; When need flexible blackboard 5 rotates, start slowspeed machine 1 and realize by 4 rotations of conveyer belt 3 drive drive sprocket axles; When need wiping flexible blackboard 5, blackboard eraser 7 is inhaled in electromagnet 8 energisings come tightly to push down flexible blackboard 5 surperficial getting final product, when not wiping examination, electromagnet 8 power-off restoration springs 9 retract blackboard eraser 7; When the need projection screen, screen 12 to be pulled out, this moment, screen sliding sash 13 moved along housing 2 inner slides, block the screen 12 of pulling out by locator card 14 then, during without screen, open locator card 14, screen is automatic drawing back under 11 effects of reel back-moving spring, and screen sliding sash 13 also is retracted in the housing 2.

Claims

1, a kind of band screen driven blackboard, it is characterized in that: be fixed with slowspeed machine (1) in the housing (2), housing (2) is supporting drive sprocket axle (4) respectively, follower shaft (6) and screen reel (10), flexible blackboard (5) embeds on drive sprocket axle (4) and follower shaft (6), connect by conveyer belt (3) between slowspeed machine (1) and the drive sprocket axle (4), blackboard eraser (7) is connecting back-moving spring (9) one ends, and it is corresponding with electromagnet (8), the back-moving spring other end is fixed on the housing (2), screen (12) one ends are fixed on the screen reel (10), its other end is fixed on the screen sliding sash (13), this frame (13) is inserted in the slideway of housing (2), locator card (14) one ends can embed in the lower frame of screen sliding sash (13), and the locator card other end is fixed on outside the housing (2).