CN204241824U - A kind of teaching board book projection arrangement - Google Patents
A kind of teaching board book projection arrangement Download PDFInfo
- Publication number
- CN204241824U CN204241824U CN201420751893.9U CN201420751893U CN204241824U CN 204241824 U CN204241824 U CN 204241824U CN 201420751893 U CN201420751893 U CN 201420751893U CN 204241824 U CN204241824 U CN 204241824U
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- CN
- China
- Prior art keywords
- belt
- writing
- projector
- projection
- blackboard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012780 transparent material Substances 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 description 2
- 239000005337 ground glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- NBGBEUITCPENLJ-UHFFFAOYSA-N Bunazosin hydrochloride Chemical compound Cl.C1CN(C(=O)CCC)CCCN1C1=NC(N)=C(C=C(OC)C(OC)=C2)C2=N1 NBGBEUITCPENLJ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a kind of teaching board book projection arrangement, comprise writing on the blackboard projection plate (1), background mechanism and projector (2), described background mechanism is positioned at the rear side of writing on the blackboard projection plate (1), described writing on the blackboard projection plate (1) is made up of transparent material, two cylinders (4) that described background mechanism comprises belt (3) and drives belt (3) to rotate, described belt (3) is sheathed on two cylinders (4), described belt (3) is parallel with writing on the blackboard projection plate (1) and press close to mutually with it, belt (3) outside black region (3.1) and white portion (3.2), described projector (2) is projected on the white portion of belt (3) when projecting.The utility model can increase effective write area, the belt of opposite side can be gone to the side pressed close to writing on the blackboard projection plate, and white portion with belt movement to change projected position, can make the content seeing projection per capita clearly of different angles.
Description
Technical field
The utility model relates to teaching aid field, specifically a kind of teaching board book projection arrangement.
Background technology
Blackboard for instructor's writing on the blackboard is that classroom institute is requisite, and for modern teaching, multimedia overhead projector also seems indispensable naturally.All have employed the teaching equipment that blackboard is combined with projection screen in a lot of classroom, the demand of teacher's writing on the blackboard should be met, projector equipment can be utilized again to carry out projection teaching.In prior art, projector equipment comprises projector and projection screen, projection screen and blackboard generally with on the body of wall being located at before classroom, but due to wall area limited, often there is overlapping part in projection screen and blackboard.Therefore there is following technical matters in the writing on the blackboard projector equipment of prior art:
1, projection screen and blackboard overlapping portion branch shield portions blackboard, some projection screens have even covered almost half blackboard, greatly reduce effective write area of blackboard;
2, the installation site of prior art projection screen is changeless, if projection screen is arranged on the left side in classroom, right side classmate's association is affected, and in like manner, if projection screen is arranged on the right side in classroom, the classmate's association in left side is subject to certain impact.If projection screen is arranged in the middle of classroom, not only can affect the viewing of both sides classmate, also can affect teacher's writing on the blackboard;
3, in order to increase effective write area of blackboard, needing at school, projector to be turned off, projection screen is risen, needing projection once more to fall, not only bother, and waste time in classroom;
4, after writing on whole blackboard, if desired multimedia projector is assisted, and now projection screen can block blackboard part chalk writing, causes certain inconvenience, to again use these chalk writings, needing again projector to turn off, being risen by projection screen.
Utility model content
In view of this, the blackboard that the utility model exists for above-mentioned prior art is overlapping with projection screen reduces the problems such as effective write area, provides the teaching board book projection arrangement that a kind of effective write area is large, projected position is adjustable.
Technical solution of the present utility model is, a kind of teaching board book projection arrangement of following structure is provided, comprise writing on the blackboard projection plate, background mechanism and projector, described background mechanism is positioned at the rear side of writing on the blackboard projection plate, described writing on the blackboard projection plate is made up of transparent material, two cylinders that described background mechanism comprises belt and drives belt to rotate, described belt sleeve is located on two cylinders, described belt is parallel with writing on the blackboard projection plate and press close to mutually with it, is provided with black region and white portion outside belt; Described projector is projected on the white portion of belt when projecting.
Adopt above structure, the utility model compared with prior art, have the following advantages: adopt the utility model, because belt is close on the writing on the blackboard projection plate be made up of transparent material, background when black region after writing on the blackboard projection plate uses as writing on the blackboard, in the respective regions writing on the blackboard of writing on the blackboard projection plate, its black background can allow the people paid attention to the class see the content of writing on the blackboard clearly, and white portion is as background during projection use, project on this region, the content of display projection can be known, belt movement is driven by the rotational of cylinder, thus change the position of white portion, then opposite side is gone to during without the need to projecting, the utility model can increase effective write area, the belt of opposite side can be gone to the side pressed close to writing on the blackboard projection plate, and be used, and white portion with belt movement to change projected position, can make the content seeing projection per capita clearly of different angles.
As preferably, described cylinder is by the first driving stepper motor, described projector to be installed on rail plate and by the second driving stepper motor, during adjustment projected position, belt under cylinder is driven is synchronized with the movement with the projector moved on rail plate, remains the white portion of projector at belt.This design is convenient to automatically regulate projected position, not only facilitating the people of different angles to watch, being also conducive to increasing effective write area simultaneously by changing projected position.
As preferably, the projection lens of projector is provided with lens cap, when suspending projection or terminate projection, blocks projection lens with lens cap, make the white portion of belt go to opposite side by the first stepper motor head roll simultaneously.Doing so avoids the worry of prior art folding and unfolding projection screen, effectively utilize the write area of writing on the blackboard projection plate simultaneously.
As preferably, the white portion of described belt is provided with light activated element, and described light activated element is electrically connected with the first stepper motor and the second stepper motor respectively, and described projector is provided with the lasing light emitter matched with light activated element.Irradiate light activated element by lasing light emitter, give the first stepper motor and the second stepper motor by light activated element by Signal transmissions, thus the belt under cylinder is driven is synchronized with the movement with the projector moved on rail plate.
As preferably, when starting projection or continuing projection, open lens cap, make the white portion of belt go to projection side by the first stepper motor head roll, projector is projected on white portion again simultaneously.Be convenient to suspend projection switch with the operating mode continuing to project.
As preferably, described in make writing on the blackboard projection plate transparent material can realize the diffuse reflection of light.So that the spectators of different angles can see the content of writing on the blackboard and projection clearly.
Accompanying drawing explanation
Fig. 1 is the structural representation (the first state) of teaching board book projection arrangement;
Fig. 1 is the structural representation (the second state) of teaching board book projection arrangement;
Fig. 3 is the structural representation of projector and rail plate;
As shown in the figure, 1, writing on the blackboard projection plate, 2, projector, 2.1, projection lens, 2.2, lens cap, 3, belt, 3.1, black region, 3.2, white portion, 4, cylinder, 5, rail plate, 6, light activated element, 7, lasing light emitter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but the utility model is not restricted to these embodiments.
The utility model contain any make on marrow of the present utility model and scope substitute, amendment, equivalent method and scheme.To have the utility model to make the public and understand thoroughly, in following the utility model preferred embodiment, describe concrete details in detail, and do not have the description of these details also can understand the utility model completely for a person skilled in the art.In addition, the needs in order to illustrate in the accompanying drawing of the utility model, completely accurately do not draw according to actual ratio, are explained at this.
As Fig. 1, shown in 2 and 3, a kind of teaching board book projection arrangement of the present utility model, comprise writing on the blackboard projection plate 1, background mechanism and projector 2, described background mechanism is positioned at the rear side of writing on the blackboard projection plate 1, described writing on the blackboard projection plate 1 is made up of transparent material, two cylinders 4 that described background mechanism comprises belt 3 and drives belt 3 to rotate, described belt 3 is sheathed on two cylinders 4, described belt 3 is parallel with writing on the blackboard projection plate 1 and press close to mutually with it, black region 3.1 and white portion 3.2 is provided with outside belt 3, described white portion 3.2 is equal with the projected area of projector 2, described projector 2 is projected on the white portion 3.2 of belt 3 when projecting.
It is to be noted that " transparent " of " described writing on the blackboard projection plate 1 is made up of transparent material " is nisi transparent, comprise the states such as translucent, with spectators through seeing font clearly for requiring, its transparency is set, such as after frosted, its transparency can reduce, and the diffuse reflection after frosted can make human eye see more clearly.
Described cylinder 4 is by the first driving stepper motor, described projector 2 to be installed on rail plate 5 and by the second driving stepper motor, during adjustment projected position, belt under cylinder 4 is driven is synchronized with the movement with the projector 2 moved on rail plate 5, remains that projector 2 is projected in the white portion 3.2 of belt 3.
The projection lens 2.1 of projector 2 is provided with lens cap 2.2, when suspending projection or terminate projection, blocks projection lens 2.1 with lens cap 2.2, make the white portion 3.2 of belt 3 go to opposite side by the first stepper motor head roll 4 simultaneously.
The white portion 3.2 of described belt 3 is provided with light activated element 6, and described light activated element 6 is electrically connected with the first stepper motor and the second stepper motor respectively, and described projector 2 is provided with the lasing light emitter 7 matched with light activated element 6.Irradiate light activated element 6 by lasing light emitter 7, give the first stepper motor and the second stepper motor by light activated element 6 by Signal transmissions, thus the belt under cylinder is driven is synchronized with the movement with the projector moved on slide rail.
When starting projection or continuing projection, open lens cap 2.2, make the white portion 3.2 of belt go to projection side by the first stepper motor head roll 4, projector 2 is projected on white portion 3.3 again simultaneously.
The described transparent material making writing on the blackboard projection plate 1 can realize the diffuse reflection of light; Such as, ground glass or frosted organic glass, but be not limited thereto.
Shown in figure 1, illustrate the duty of white portion in projection side.Described belt 3 is pressed close to (belt the two being pressed close to mutually side is referred to as projection side) mutually and is comprised the two and contact with each other and do not contact two kinds of situations with writing on the blackboard projection plate 1, appropriate distance is set for the purpose of the technical matters solving the utility model, material elementses such as appropriate distance visible rays situation and determining.Described white portion 3.2 is equal with the projected area of projector 2 not to be referred to definitely equal, can hold projection ray be as the criterion with white portion 3.2.Described background mechanism is positioned at the rear side of writing on the blackboard projection plate 1, and described rear side is relative appellation, is front with spectators, and after writing on the blackboard projection plate is, therefore background mechanism is after writing on the blackboard projection plate.In Fig. 1, arrange in light activated element 6, figure eliminate the first stepper motor on the top of white portion 3.2, nonetheless, those of ordinary skill in the art still can understand the technology contents of the utility model with reference to the accompanying drawings.In Fig. 1, duty is applicable to the situation of needs writing on the blackboard simultaneously and projection, by projector in white portion, instructor can at the writing on the blackboard projection plate that black region is corresponding enterprising andante book, because writing on the blackboard projection plate is the transparent material with diffuse reflection function, be convenient to spectators' (including but not limited to learner) viewing.
Shown in figure 2, illustrate white portion not in the duty of projection side, this is also the difference of Fig. 2 and Fig. 1, and the part that this place does not describe in detail can with reference to the above-mentioned description to Fig. 1.This duty closes projector or the state after blocking projection lens, and the projection side of belt is black region.
Shown in figure 3, illustrate the projector be installed on rail plate, eliminate the second stepper motor.Projector 2 is provided with projection lens 2.1, and is provided with the lens cap 2.2 that can block projection lens 2.1, and lens cap adopts the mode of sliding, and also can adopt the folding mode fastened, the two is all by drive and control of electric machine.Above projection lens 2.1, be provided with lasing light emitter 7, described lasing light emitter 7 and light activated element 6 with the use of.
" lens cap blocks projection lens " easy to use just in order in classroom or teaching process, does not close the power supply of projector, also needs to close projector power supply after end.
The utility model also has the advantage that prior art does not have: adopt ground glass or frosted organic glass under dampness, do not affect the writing effect of chalk, therefore wet towel can be used to regard blackboard eraser, avoid the infringement of dust to user lung.
Below be only described with regard to the utility model preferred embodiment, but can not be interpreted as it is limitations on claims.The utility model is not only confined to above embodiment, and its concrete structure allows to change.In a word, all various changes done in the protection domain of the utility model independent claims are all in protection domain of the present utility model.
Claims (4)
1. a teaching board book projection arrangement, it is characterized in that: comprise writing on the blackboard projection plate (1), background mechanism and projector (2), described background mechanism is positioned at the rear side of writing on the blackboard projection plate (1), described writing on the blackboard projection plate (1) is made up of transparent material, two cylinders (4) that described background mechanism comprises belt (3) and drives belt (3) to rotate, described belt (3) is sheathed on two cylinders (4), described belt (3) is parallel with writing on the blackboard projection plate (1) and press close to mutually with it, belt (3) outside is provided with black region (3.1) and white portion (3.2), described projector (2) is projected on the white portion (3.2) of belt (3) when projecting.
2. teaching board book projection arrangement according to claim 1, it is characterized in that: described cylinder (4) is by the first driving stepper motor, it is upper and by the second driving stepper motor that described projector (2) is installed on rail plate (5), during adjustment projected position, belt under cylinder (4) is driven is synchronized with the movement with at the upper projector (2) moved of rail plate (5), remains that projector (2) is projected in the white portion (3.2) of belt (3).
3. teaching board book projection arrangement according to claim 1 and 2, is characterized in that: on the projection lens (2.1) of projector (2), be provided with lens cap (2.2).
4. teaching board book projection arrangement according to claim 1 and 2, it is characterized in that: the white portion (3.2) of described belt (3) is provided with light activated element (6), described light activated element (6) is electrically connected with the first stepper motor and the second stepper motor respectively, and described projector (2) is provided with the lasing light emitter (7) matched with light activated element (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420751893.9U CN204241824U (en) | 2014-12-03 | 2014-12-03 | A kind of teaching board book projection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420751893.9U CN204241824U (en) | 2014-12-03 | 2014-12-03 | A kind of teaching board book projection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204241824U true CN204241824U (en) | 2015-04-01 |
Family
ID=52771295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420751893.9U Expired - Fee Related CN204241824U (en) | 2014-12-03 | 2014-12-03 | A kind of teaching board book projection arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204241824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123124A1 (en) * | 2021-12-29 | 2023-07-06 | 广州工商学院 | College military course ideology and politics movie, television and song teaching experience device |
-
2014
- 2014-12-03 CN CN201420751893.9U patent/CN204241824U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123124A1 (en) * | 2021-12-29 | 2023-07-06 | 广州工商学院 | College military course ideology and politics movie, television and song teaching experience device |
| CN117581284A (en) * | 2021-12-29 | 2024-02-20 | 广州工商学院 | A film and television song teaching experiencer for ideological and political education in military courses in colleges and universities |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20151203 |
|
| EXPY | Termination of patent right or utility model |