CN209265168U - English teaching Multifunctional blackboard - Google Patents

Abstract

A kind of English teaching Multifunctional blackboard, to solve the technical issues of existing projection screen, writing blackboard integration tool cannot use projection screen or blackboard function simultaneously.It includes rectangle framework, the interior frame width of the rectangle framework is 9 unit lengths, a length of 16~18 unit length, positioning vertical bar is installed in the rectangle framework, the front side surface of the positioning vertical bar is the first curtain plane, the wide frame back gauge of the positioning vertical bar and the rectangle framework is 12 unit lengths, so that the narrow screen projected area of formation and widescreen benefit connect projected area in the rectangle framework；Correspond to narrow screen projected area in the rectangle framework and the first projection screen panel is installed, the second projection screen panel is installed connecing projected area corresponding to widescreen benefit, the first projection screen panel, the second projection screen panel are capable of forming projection screen or writing blackboard.It can use narrow screen projection screen and blackboard function simultaneously, can also use as widescreen projection curtain.

Description

English teaching Multifunctional blackboard

Technical field

The utility model relates to educational aid technical fields, and in particular to a kind of English teaching Multifunctional blackboard.

Background technique

In classroom, wall center position is optimal blackboard installation site.But as the popularization of multimedia teaching is answered With also needing separately to set one piece of projection screen in classroom, at this point, projection screen, blackboard have tied up teaching metope jointly, regardless of it Installation, at least side will appear the excessive situation in visual angle drift angle.

The Chinese patent literature CN203920124U for being disclosed on November 5th, 2014 describes a kind of blackboard, as writing Panel and by after the writing panel blade overturning be used as projection screen panel, comprising: blackboard framework, have outwardly and perpendicular to ground The front panel in face；Two rotary units, be located at the front panel it is opposite to two frames on the inside of；A plurality of leaves Piece is being located between two rotary units in the blackboard frame body；Motor, for driving the plurality of vanes whole Forward and reverse 180 ° of rotation；Motor switch is connected with the motor, for switching on and off the motor rotation；And transmission Mechanism, setting be connected between two rotary units with the motor, for by the power transmission of the motor to position In the rotary unit at both ends to drive the plurality of vanes accordingly to be rotated, wherein the front panel is transparent Frosted acrylic board, for being used as clipboard, the rotary unit includes the base being fixed on the inside of the front panel Connecting rod, it is parallel with the base connecting rod by the transmission mechanism drive push-and-pull movable rod, the one of the plurality of vanes Side is connected between the base connecting rod and the movable rod for corresponding a plurality of companies for installing the blade Hack lever, in the case where the push-and-pull of the movable rod drives, a plurality of connecting rods point to be mutually flexibly connected with the base connecting rod respectively Axis carries out forward and reverse overturning overlapping lid as basic point and closes, so that a plurality of connecting rods are accordingly overturn, the plurality of vanes In each blade opposite to each other to two side surface parts correspondingly overturn outwardly, the wherein side face of each blade is black Painting cloth item, other side face are projection screen cloth, and a plurality of black cloths are a plurality of for continuously coupled at blackboard background The projection screen cloth is for continuously coupled at projection screen panel.

In synchronization, it is only capable of the projection screen or blackboard function using this kind of blackboard, still, in normal teaching, class Before prepare lessons and be not able to satisfy field research needs, it is therefore desirable to blackboard is as auxiliary writing on the blackboard tool.

Standard electronic computer screen is divided into narrow screen and widescreen, compatible with this, and existing projector can also prop up Hold narrow screen and widescreen projection.Specifically, the length-width ratio of the narrow screen of standard is 4:3, the length-width ratio of standard widescreen is 16:9.

Utility model content

The goal of the invention of the utility model is to provide a kind of English teaching Multifunctional blackboard, to solve existing projection Curtain, writing blackboard integration tool cannot use the technical issues of projection screen or blackboard function simultaneously.

In order to solve the above technical problems, the utility model adopts the following technical solution:

Design a kind of English teaching Multifunctional blackboard, including rectangle framework, the interior frame width of the rectangle framework For 9 unit lengths, a length of 16~18 unit length is installed with positioning vertical bar, the positioning vertical bar in the rectangle framework Front side surface be the first curtain plane, it is described positioning vertical bar and the rectangle framework wide frame back gauge for 12 units it is long Degree, so that the narrow screen projected area of formation and widescreen benefit connect projected area in the rectangle framework；It is corresponding in the rectangle framework The first projection screen panel is installed in narrow screen projected area, the second projection panel is installed connecing projected area corresponding to widescreen benefit Plate, the first projection screen panel, the second projection screen panel are capable of forming projection screen or writing blackboard.

Preferably, the first projection screen panel, the second projection screen panel include have latch functions rotary unit and Plural pieces plate, the plate in the broadside of the rectangle framework array setting and with the rectangle framework pivot Connection, the two sides of the plate are respectively equipped with the second curtain plane, writing blackboard face；The rotary unit of the tool latch functions For driving the plate for belonging to the first projection screen panel synchronous 180 ° of overturning in the narrow screen projected area, or use 180 ° of overturning is synchronized in projected area in driving the plate for belonging to the second projection screen panel to connect in widescreen benefit, and The plate can be made to position relative to the rectangle framework locking.

Further, the rotary unit of the tool latch functions includes worm couple, the worm gear of the worm couple It is fixed together with the plate, the worm screw spinning of the worm couple is in the rectangle framework.

Further, four line lattice of used in English writing are equipped on the writing blackboard face of the plate.

Compared with prior art, the utility model has the beneficial effects that narrow screen projection screen and blackboard function can be used simultaneously Can, it can also be used as widescreen projection curtain.

Detailed description of the invention

Fig. 1 is a kind of main view of English teaching Multifunctional blackboard of the utility model, and in figure, a represents unit length.

Fig. 2 is a kind of structure chart of plate.

In figure, 1- rectangle framework, 11- positions vertical bar, 2- the first projection screen panel, 21- plate, 212- shaft, 213- Rolling bearing, 214- rolling bearing, 215- worm gear, 22- worm screw, 3- the second projection screen panel, 31- plate, 32- worm screw.

Specific embodiment

Illustrate specific embodiment of the present utility model with reference to the accompanying drawings and examples, but following embodiment only uses It is described in detail the utility model, does not limit the scope of the utility model in any way.

Embodiment 1: a kind of English teaching Multifunctional blackboard, referring to Fig. 1-2, including rectangle framework 1, rectangle frame The interior frame width of body 1 is 9 unit lengths, and length answers >=16 unit lengths, such as can be 18 unit lengths, but 16 unit lengths are more It is beautiful.Positioning vertical bar 11 is fixedly connected in rectangle framework 1, the front side surface of positioning vertical bar 11 is the first curtain plane, First curtain plane is that can be realized projecting function in the front side surface for positioning vertical bar 11.Position vertical bar 11 and rectangle framework 1 Wide frame back gauge be 12 unit lengths, so as to form narrow screen projected area in rectangle framework and widescreen benefit connects projected area；Work as English Language teaching uses Multifunctional blackboard as widescreen projection curtain in use, the first curtain that the front side surface of positioning vertical bar 11 is formed Plane connects projected area for being connected narrow screen projected area and widescreen benefit.Projection when, projector and Multifunctional blackboard distance farther out, Therefore, the first curtain plane connects influence of the distance between the projected area to drop shadow effect and can neglect with narrow screen projected area or widescreen benefit Slightly.

Correspond to narrow screen projected area in rectangle framework 1 and first projection screen panel 2 is installed, is connect corresponding to widescreen benefit Projected area is equipped with the second projection screen panel 3, and the first projection screen panel 2, the second projection screen panel 3 are capable of forming projection screen Or writing blackboard.

As exemplary preferred embodiment, the first projection screen panel 2 includes the rotary unit and plural number sheet of tool latch functions Piece 21, the array in the broadside of rectangle framework 1 of plate 21 are arranged and are pivotally connected with rectangle framework 1, plate 21 Two sides are set to the second curtain plane, writing blackboard face, and the array in the broadside of rectangle framework 1 of plate 21 is arranged When, gap is not present in the transverse direction in writing blackboard face, lateral writing style can be met.Referring to fig. 2, the two of plate 21 End is fixedly connected to shaft 212, and the inner ring of rolling bearing 213, the inner ring of rolling bearing 214 are separately mounted to 21 two sides of plate Shaft 212 on, the outer ring of rolling bearing 213 is mounted in rectangle framework 1, and the outer ring of rolling bearing 214 is mounted on positioning On the rear wall of vertical bar 11；The rotary unit of tool latch functions is for driving the plate 21 for belonging to the first projection screen panel 2 narrow Shield synchronous 180 ° of overturning in projected area, and these plates 21 can be made to position relative to 1 locking of rectangle framework.Preferably, The rotary unit for having latch functions includes worm couple, and worm gear 215 and the plate of worm couple are fixed together, for example, Worm gear 215 is mounted in shaft 215, and 22 spinning of worm screw of worm couple is in rectangle framework 1.

Second projection screen panel 3 includes the rotary unit and plural pieces plate 31 of tool latch functions, and plate 31 is in rectangle Array is arranged and is pivotally connected with rectangle framework 1 in the broadside of framework 1, and the two sides of plate 31 are respectively equipped with act 2 Cloth plane, writing blackboard face are fixedly connected to shaft at the both ends of plate 31, the inner ring of rolling bearing, rolling bearing it is interior Ring is separately mounted in the shaft of 31 two sides of plate, and the outer ring of one of rolling bearing is mounted in rectangle framework 1, another The outer ring of a rolling bearing is mounted on the rear wall of positioning vertical bar 11；The rotary unit of tool latch functions belongs to for driving The plate 31 of two projection screen panels 3 connects in projected area synchronous 180 ° of overturning in widescreen benefit, and can make these plates 31 relative to The positioning of 1 locking of rectangle framework.Preferably, the rotary unit of tool latch functions includes worm couple, worm couple Worm gear is fixed together with plate, for example, worm gear is mounted in shaft, 32 spinning of worm screw of worm couple is in rectangle framework In 1.

As exemplary preferred embodiment, four line lattice of used in English writing are equipped on the writing blackboard face of plate 21, in plate 31 writing blackboard face is equipped with four line lattice of used in English writing.

First curtain plane, the second curtain plane, writing blackboard face are produced on corresponding position using the prior art.

In use, when worm screw 22 rotates, it will be able to drive worm gear 215 to rotate, the plate 21 being fixed together with worm gear 215 Also it can rotate with it, after plate rotates 180 °, it will be able to recall the second curtain plane or writing blackboard face.Likewise, When worm screw 32 rotates, it will be able to drive worm gear to rotate, the plate 31 being fixed together with worm gear can also rotate with it, and work as plate After 180 ° of rotation, it will be able to recall the second curtain plane or writing blackboard face.

For ease of use, worm screw and stepper motor can be sequentially connected, stepper motor and stepper motor driver pair It should be electrically connected, the control terminal of stepper motor driver is electrically connected with the GPIO pin of single-chip microcontroller one-to-one correspondence, the GPIO of single-chip microcontroller Interface electrical connection rotates forward input circuit, reversion input circuit.In this manner it is possible to rotate forward input circuit or reversion input by operation Operation component in circuit realizes that control stepper motor rotates and reverse, and stepper motor is made to pass through worm-gears band movable plate Piece overturns 180 ° forward or backwards.

Handwheel can be housed in cuboid frame with pivot, the second worm gear, the second worm gear and snail are installed in the shaft of handwheel Bar 22 or the engagement connection of worm screw 32, in this way, adjusting the transmission direction of worm screw 22 or worm screw 32, the shaft of handwheel by the second worm gear It can be perpendicular to the front side surface of rectangle framework.

The utility model is described in detail above in conjunction with drawings and examples, still, the skill of technical field Art personnel, can also be to each specific in above-described embodiment it is understood that without departing from the purpose of the present invention Parameter changes, and forms multiple specific embodiments, is the common variation range of the utility model, no longer detailed one by one herein It states.

Claims (4)

1. a kind of English teaching Multifunctional blackboard, which is characterized in that including rectangle framework, the rectangle framework it is interior Frame width is 9 unit lengths, and a length of 16~18 unit length is installed with positioning vertical bar, the positioning in the rectangle framework The front side surface of vertical bar is the first curtain plane, and the wide frame back gauge of the positioning vertical bar and the rectangle framework is 12 units Length, so that the narrow screen projected area of formation and widescreen benefit connect projected area in the rectangle framework；It is right in the rectangle framework The first projection screen panel should be installed in narrow screen projected area, the second projection screen is installed connecing projected area corresponding to widescreen benefit Panel, the first projection screen panel, the second projection screen panel are capable of forming projection screen or writing blackboard.

2. English teaching Multifunctional blackboard as described in claim 1, which is characterized in that the first projection screen panel, Second projection screen panel includes the rotary unit and plural pieces plate for having latch functions, and the plate is in the rectangle framework Broadside on array setting and with the rectangle framework be pivotally connected, the two sides of the plate are respectively equipped with act 2 Cloth plane, writing blackboard face；The rotary unit of the tool latch functions belongs to the first projection screen panel for driving The plate synchronous 180 ° of overturning in the narrow screen projected area, or for driving the institute for belonging to the second projection screen panel It states plate and connects synchronous 180 ° of overturning in projected area in widescreen benefit, and the plate can be made relative to the rectangle framework Locking positioning.

3. English teaching Multifunctional blackboard as claimed in claim 2, which is characterized in that the rotation of the tool latch functions Unit includes worm couple, and the worm gear of the worm couple is fixed together with the plate, the worm couple Worm screw spinning is in the rectangle framework.

4. English teaching Multifunctional blackboard as claimed in claim 2, which is characterized in that in the writing blackboard of the plate Face is equipped with four line lattice of used in English writing.