CN2269619Y

CN2269619Y - Rolling-up type writing and demonstrating board

Info

Publication number: CN2269619Y
Application number: CN 96204134
Authority: CN
Inventors: 刘仁南
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-02
Filing date: 1996-02-02
Publication date: 1997-12-03
Anticipated expiration: 2006-02-02

Abstract

The utility model relates to a rolling-up type writing and demonstrating board, which is provided with a large enough writing surface. The utility model can be used for writing continuously in a class, and can also be used for demonstrating a large amount of contents written in advance in the class. The utility model is formed that the upper and the lower ends of a rectangular hollow backing board are respectively provided with a rolling shaft capable of rotating; both ends of a longer white plastic film are respectively rolled on the upper and the lower rolling shafts to form a writing board regarding the hollow backing board as a writing backing board and the plastic film between the two rolling shafts as the writing surface; then the inner part of the hollow backing board is provided with a speed reducing device for driving the rolling shafts to rotate.

Description

The rolling-up typ writing demonstration board

The utility model relates to a kind of teaching equipment, belongs to the rolling-up typ writing demonstration board.

At present, its plate face of small blackboard as presentation tool in the teaching is less, and demo content is limited, causes the multinomial content of demonstration to use a plurality of small blackboards often, gives to carry and demonstration causes a lot of inconvenience.

The purpose of this utility model is to avoid the deficiency in the background technology, provides a kind of volume little, and the plate face is fully big, both can be used for the classroom and has constantly write, and can be used for writing and the demonstration plate of a large amount of demonstrations on the classroom again.

The purpose of this utility model can be achieved through the following technical solutions: respectively adorn a rotary scroll bar at the upper and lower end of a hollow backing plate of rectangle, two ends than long white nonrigid plastic writing surface are twisted in respectively on upper and lower two scroll bars, make two writing surfaces between the scroll bar under the liner of backing plate, form a clipboard.For scroll bar is rotated,,, motor is rotated by the follower that reduction gear drives on the scroll bar at the inside of hollow backing plate dress micromotor and reduction gear at the end dress follower of scroll bar.Its most of writing surface volume of writing demonstration board by this scheme structure exists on two scroll bars, when motor drives a scroll bar rotation by reduction gear, writing surface can constantly be rolled up and exist on this scroll bar, and volume exists the writing surface on another scroll bar constantly to emit simultaneously.

The utility model is compared the above-mentioned background technology and is had following advantage: bigger writing surface is arranged, can the more content of continuous writing when being used for the classroom and writing and do not need wiping board, and the content of writing is convenient to check.The content that need demonstrate in a large number can be write out in advance before the class, can be reduced a large amount of unnecessary classrooms and write, save time in classroom, improve efficiency of teaching and quality.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a front view of the present utility model.

Fig. 2 is the left view after Fig. 1 removes left pedestal plate 3.

Fig. 3 is that front view cuts open in the office that Fig. 1 removes behind writing surface 1 and the front shroud 2.

Fig. 4 is the enlarged drawing of part reduction gear among Fig. 3.

Fig. 5 and Fig. 6 are respectively that front view and left view cut open in the office of the hollow backing plate of front shroud 2 among Fig. 1 and Fig. 2, back base plate 7 and rectangle frame 11 formations.

Referring to Fig. 1, Fig. 2, the main frame of this writing demonstration board is the hollow backing plate that is made of front shroud 2, back base plate 7 and rectangle frame 11 and the pedestal plate 3 of both sides thereof.The view of hollow backing plate is seen Fig. 5 and Fig. 6.Two scroll bar 4 usefulness pedestal plates 3 are installed in the upper and lower end of hollow backing plate respectively by bearing.Writing surface 1 is long white plastic film, and its two ends twist in respectively on upper and lower two scroll bars 4, and the writing surface that is attached on the hollow backing plate between two scroll bars can be for writing.

Referring to Fig. 2,3, at the left end of scroll bar 4 belt pulley 5 is housed, belt pulley 5 links to each other with small belt pulley 9 by belt 6, and two small belt pulleys 9 are separately fixed on upper and lower two output shafts (8,10) of reduction gear.When output shaft 8 rotates, can drive scroll bar and rotate; When output shaft 10 rotates, can drive down scroll bar and rotate.Reduction gear is contained in the inside of hollow backing plate, is by direct current generator 12, cylindrical gear (13,14), conical gear (15,16,24,25), transmission shaft (17,20,23), rotary joint (18,19,21,22) and output shaft formations such as (8,10).Transmission shaft 20 is positioned at the middle part of reduction gear, and its upper and lower end is equipped with rotary joint 19 and rotary joint 21 respectively, and a gear wheel 14 is equipped with at its middle part, and gear 14 is meshed with pinion wheel 13 on the motor 12; Transmission shaft 17 is positioned at the top of reduction gear, and its upper and lower end is equipped with small conical gear 15 and rotary joint 18 respectively, and gear 15 is meshed with gear wheel 16 on being contained in output shaft 8; Transmission shaft 23 is positioned at the bottom of reduction gear, and its upper and lower end is equipped with rotary joint 22 and small conical gear 25 respectively, and gear 25 is meshed with gear wheel 24 on being contained in down output shaft 10.Rotary joint is that the not isometric spiral pipe by two one metal wire coileds is constituted.Transmission shaft 20 can be screwed in transmission shaft 17 by rotary joint 19 and rotary joint 18, also can be screwed in transmission shaft 23 by rotary joint 21 and rotary joint 22.When motor 12 rotates, the pinion wheel 13 engaged transmission gear wheels 14 on the motor 12.If motor driven gear 14 rotates counterclockwise, then rotary joint 21 is separated with rotary joint 22, and rotary joint 19 is screwed in rotary joint 18 simultaneously, then the pinion wheel 15 engaged transmission gear wheels 16 coaxial with rotary joint 18, thus make output shaft 8 rotations; Otherwise if motor driven gear 14 clockwise rotates, then rotary joint 19 is separated with rotary joint 18, and rotary joint 21 is screwed in rotary joint 22 simultaneously, then the pinion wheel 25 engaged transmission gear wheels 24 coaxial with rotary joint 22, thus make down output shaft 10 rotations.Therefore, as long as the rotation direction of control motor just can make output shaft rotate or output shaft rotation down, and make another output shaft be in state free to rotate.The rotation direction of motor can change sense of current by gauge tap to be controlled, and gauge tap can be contained on the pedestal plate 3.When motor drives a scroll bar rotation by reduction gear, writing surface is just constantly rolled up and is existed on this scroll bar, the writing surface that twists in simultaneously on another scroll bar is constantly emitted, so realized when the writing surface of writing word is rolled, the purpose of new writing surface constantly is provided for the writer again.

The writing surface 1 of this writing demonstration board also can be made with compression moulding paper, and belt pulley (5,9) and belt 6 also can change gear and chain into.The writing pen of this writing demonstration board is colored blank pen.

Claims

A kind of rolling-up typ writing demonstration board that is used to impart knowledge to students.It is formed on a hollow backing plate that is made of rectangle frame (11), front shroud (2) and back base plate (7), it is characterized in that: the scroll bar (4) of respectively adorning one one end belt leather belt wheel (5) at the upper and lower end of hollow backing plate; Writing surface (1) is long white plastic film, and its two ends twist in respectively on upper and lower two scroll bars (4); In the inside of hollow backing plate the reduction gear that is used to drive the scroll bar rotation is housed, reduction gear has upper and lower two output shafts (8,10), and belt pulley (9) is arranged on the output shaft, and belt pulley (9) is connected on the belt pulley (5) through belt (6).