CN104330949A - Blackboard writing projection mechanism for teaching - Google Patents
Blackboard writing projection mechanism for teaching Download PDFInfo
- Publication number
- CN104330949A CN104330949A CN201410727030.2A CN201410727030A CN104330949A CN 104330949 A CN104330949 A CN 104330949A CN 201410727030 A CN201410727030 A CN 201410727030A CN 104330949 A CN104330949 A CN 104330949A
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- Prior art keywords
- white
- projection
- background board
- projector
- removable
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/562—Screens moving during projection
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a blackboard writing projection mechanism for teaching. The blackboard writing projection mechanism comprises a blackboard writing projection plate (1), a background mechanism and a projector (2), wherein the background mechanism is arranged at the rear side of the blackboard writing projection plate (1) and close to the blackboard writing projection plate (1), the blackboard writing projection plate (1) is made of a transparent material, the background mechanism comprises a black movable background plate (3), a white movable background plate (4) and a black fixed background plate (5) which are orderly arranged at the rear side of the blackboard writing projection plate, the areas of the white movable background plate (4) and the black movable background plate (3) are the same, and the white movable background plate (4) and the black movable background plate (3) can move left and right under the driving of a power mechanism. Due to the adoption of the blackboard writing projection mechanism disclosed by the invention, the effective writing area can be increased, the position of the white movable background plate can be changed so that the people at different angles can clearly see the content of the projection, and the projection and the switching of the projection states can be realized.
Description
Technical field
The present invention relates to teaching aid field, specifically a kind of teaching board book projector mechanism.
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.
Summary of the invention
In view of this, the present invention is directed to the blackboard that above-mentioned prior art exists and overlappingly with projection screen reduce the problems such as effective write area, provide the teaching board book projector mechanism that a kind of effective write area is large, projected position is adjustable.
Technical solution of the present invention is, a kind of teaching board book projector mechanism 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 and presses close to mutually with it, described writing on the blackboard projection plate is made up of transparent material, described background mechanism comprises the removable background board of black be sequentially arranged on rear side of writing on the blackboard projection plate, the removable background board of white and black fixed background plate, the area equation of the removable background board of described white and the removable background board of black, the two can move left and right under the driving of actuating unit,
During projection, white removable background board and the removable background board mutual dislocation of black, on the removable background board of the white of image projecting after writing on the blackboard projection plate of projector; When not projecting, the removable background board of black is positioned at the dead ahead of white removable background board.
Adopt above structure, the present invention compared with prior art, have the following advantages: adopt the present invention, because background mechanism is close on the writing on the blackboard projection plate be made up of transparent material, background when fixed black background board 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, the removable background board of white is as the background of projection, project on this region, the content of display projection can be known, then removable for black background board is moved to the dead ahead of white removable background board during without the need to projecting to block its white background, make whole product for writing on the blackboard.The present invention can increase effective write area, can change the position of white removable background board, makes the content seeing projection per capita clearly of different angles, and can realize the switching of projection and projection state.
As preferably, described actuating unit comprises the first lead screw motor and the second lead screw motor, the first described lead screw motor is connected with the first screw mandrel, and the removable background board of described white is installed on the first screw mandrel and also can moves along the first screw mandrel under the driving of the first lead screw motor; The second described spindle motor is connected with the second screw mandrel, and the removable background board of described black is installed on the second screw mandrel and also can moves along the second screw mandrel under the driving of the second lead screw motor.Drive background board to move by screw body, achieve the conversion of projected position and the convenient switching of projection state.
As preferably, described projector is installed on rail plate, during adjustment projected position, the first lead screw motor is made to drive white removable background board to move, simultaneously projector slides on rail plate, keeps projector on the removable background board of white and white removable background board and the removable background board sequence of black.Be convenient to regulate projected position as required.
As preferably, the removable background board of described white is provided with light activated element, and described projector is provided with the lasing light emitter matched with light activated element, and described light activated element is connected with the first lead screw motor and the second lead screw motor respectively.During adjustment projected position, projector slides along rail plate, lasing light emitter touches light activated element, control lead screw motor by light activated element to move, remain lasing light emitter alignment light photosensitive elements, thus keep projector on the removable background board of white, background board sequence removable with black simultaneously.
As preferably, the projection lens of projector is provided with lens cap, when suspending projection or terminate projection, block projection lens with lens cap, lasing light emitter touches light activated element, controls by light activated element the dead ahead that the second lead screw motor moves to white removable background board.Doing so avoids the worry of prior art folding and unfolding projection screen, former view field just becomes the region can writing writing on the blackboard, effectively utilizes the write area of writing on the blackboard projection plate.
As preferably, when starting projection or continuing projection, open lens cap, light activated element is touched by lasing light emitter, light activated element controls the first lead screw motor and the second lead screw motor, and make white removable background board and the removable background board sequence of black, projector is on the removable background board of white.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 structural representation of the present invention (the first state);
Fig. 2 is structural representation of the present invention (the second state);
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, the removable background board of black, the 3.1, second screw mandrel, 4, white removable background board, 4.1, the first screw mandrel, 5, black fixed background plate, 6, light activated element, 7, lasing light emitter, 8, rail plate.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but the present invention is not restricted to these embodiments.
The present invention contain any make on marrow of the present invention and scope substitute, amendment, equivalent method and scheme.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.In addition, the needs in order to illustrate in the accompanying drawing of the present invention, 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 projector mechanism of the present invention, 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 and presses close to mutually with it, described writing on the blackboard projection plate 1 is made up of transparent material, described background mechanism comprises the removable background board 3 of black be sequentially arranged on rear side of writing on the blackboard projection plate, the removable background board 4 of white and black fixed background plate 5, the area equation of the removable background board of described white 4 and the removable background board 3 of black, the two can move left and right under the driving of actuating unit,
During projection, white removable background board 4 and black removable background board 3 mutual dislocation, on the removable background board 4 of the white of image projecting after writing on the blackboard projection plate of projector; When not projecting, the removable background board of black 3 is positioned at the dead ahead of white removable background board 4.
Size for the removable background board of black 3, white removable background board 4 and black fixed background plate 5 arranges as follows: the length of described black fixed background plate 5 is the removable background board of black 3 or white removable background board 4 more than three times be advisable (but being not limited to this ratio), namely when the removable background board 4 of white is positioned at centre, the removable background board 3 of black just moves on the left of it or right side, can not block during projection.
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 actuating unit comprises the first lead screw motor and the second lead screw motor, the first described lead screw motor is connected with the first screw mandrel 4.1, and the removable background board 4 of described white is installed on the first screw mandrel 4.1 and also can moves along the first screw mandrel 4.1 under the driving of the first lead screw motor; The second described spindle motor is connected with the second screw mandrel 3.1, and the removable background board 3 of described black is installed on the second screw mandrel 3.1 and also can moves along the second screw mandrel 3.1 under the driving of the second lead screw motor.
Described projector 2 is installed on rail plate 8, during adjustment projected position, the first lead screw motor is made to drive white removable background board 4 to move, projector 2 slides on rail plate 8 simultaneously, keeps projector 2 to be projected on white removable background board 4 and white removable background board 4 black removable background board 3 sequence.
The removable background board 4 of described white is provided with light activated element 6, and described projector 2 is provided with the lasing light emitter 7 matched with light activated element 6, and described light activated element 6 is connected with the first lead screw motor and the second lead screw motor respectively.During adjustment projected position, projector slides along rail plate, lasing light emitter touches light activated element, control lead screw motor by light activated element to move, remain lasing light emitter alignment light photosensitive elements, thus keep projector on the removable background board of white, background board sequence removable with black simultaneously.
The projection lens 2.1 of projector 2 is provided with lens cap 2.2, when suspending projection or terminate projection, block projection lens 2.1 with lens cap 2.2, lasing light emitter 7 touches light activated element 6, controls by light activated element 6 dead ahead that second lead screw motor moves to white removable background board 4.
When starting projection or continuing projection, open lens cap 2.2, touch light activated element 6 by lasing light emitter 7, light activated element 6 controls the first lead screw motor and the second lead screw motor, make white removable background board 4 and black removable background board 3 sequence, projector 2 is projected on white removable background board 4.
The described transparent material making writing on the blackboard projection plate 1 can realize the diffuse reflection of light.
The present invention can adopt following concrete implementation step to carry out:
By controlling, during projection, white removable background board is synchronous with projector all the time, that is: no matter projector any position in orbit, the position of the white removable background board of projector scope correspondence;
When needs projector, except allowing the removable background board of projector alignment white, also require that black background plate and white background plate misplace (by controlling the motor of driving two rhizoid bar, and the number of turns that the position of white removable background board and the removable background board of black is rotated by travel switch and stepper motor is at any time determined)
(now do not have projecting function, only have blackboard (writing on the blackboard) function) lens cap action when projector closed by needs, covers projector lens.Now black background plate moves to white background plate dead ahead, makes the background at writing on the blackboard background board rear be all black, forms blackboard.
And, color due to the white letter written with chalk on writing on the blackboard projection plate is white, consistent with white background, therefore on writing on the blackboard projection plate, the white chalk of optional position does not all affect drop shadow effect, when namely projecting, do not need the white letter written with chalk wiping view field, after projection disappears, white letter written with chalk can continue to use.
Also there is other embodiment in the switching for projection state: increases controller, the motor, the first lead screw motor that control lens cap are all connected with controller with the second lead screw motor, when suspending projection or terminate projection, lens cap is driven to block projection lens by motor, controller controls the first lead screw motor and the second lead screw motor simultaneously, makes the removable background board of black be positioned at the dead ahead of white removable background board; When starting projection or continuing projection, controller controls lens cap and removes, control the first lead screw motor and the second lead screw motor simultaneously, make the removable background board of black and the removable background board sequence of white, projector is on the removable background board of white, and the light activated element on the removable background board of described white is aimed at lasing light emitter.The difference of this embodiment is: when projection state switches, and does not need to adopt lasing light emitter and light activated element to control, and is directly controlled the interlock of lens cap and the first lead screw motor, the second lead screw motor by controller.
In addition, described lens cap is by remote pilot, and remote control is connected with driving the motor wireless telecommunications of lens cap, and the first lead screw motor also can be connected with remote-control radio with the second lead screw motor, is controlled by remote control.
" 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.It should be noted that, clear in order to illustrate, Fig. 1 and 2 eliminates the first lead screw motor and the second lead screw motor, but those of ordinary skill in the art all can understand relevant technology.Fig. 1 is the signal of projection state, and Fig. 2 is the signal under non-projection state.
The present invention 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, wet towel therefore can be used to regard blackboard eraser, avoid the infringement of dust to user lung.
Below only just preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention 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 independent claims of the present invention are all in protection scope of the present invention.
Claims (7)
1. a teaching board book projector mechanism, 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) and presses close to mutually with it, described writing on the blackboard projection plate (1) is made up of transparent material, described background mechanism comprises the removable background board of black (3) be sequentially arranged on rear side of writing on the blackboard projection plate, the removable background board of white (4) and black fixed background plate (5), the area equation of the removable background board of described white (4) and the removable background board of black (3), the two can move left and right under the driving of actuating unit,
During projection, white removable background board (4) and the removable background board of black (3) mutual dislocation, in the removable background board of the white of image projecting after writing on the blackboard projection plate (4) of projector; When not projecting, the removable background board of black (3) is positioned at the dead ahead of white removable background board (4).
2. teaching board book projector mechanism according to claim 1, it is characterized in that: described actuating unit comprises the first lead screw motor and the second lead screw motor, the first described lead screw motor is connected with the first screw mandrel (4.1), and the removable background board of described white (4) is installed on the first screw mandrel (4.1) above also can be mobile along the first screw mandrel (4.1) under the driving of the first lead screw motor; The second described spindle motor is connected with the second screw mandrel (3.1), and the removable background board of described black (3) is installed on the second screw mandrel (3.1) above also can be mobile along the second screw mandrel (3.1) under the driving of the second lead screw motor.
3. teaching board book projector mechanism according to claim 2, it is characterized in that: described projector (2) is installed on rail plate (8), during adjustment projected position, the first lead screw motor is made to drive white removable background board (4) mobile, simultaneously projector (2) slides rail plate (8) is upper, keeps projector (2) to be projected in upper and white removable background board (4) black removable background board (3) sequence of white removable background board (4).
4. teaching board book projector mechanism according to claim 2, it is characterized in that: the removable background board of described white (4) is provided with light activated element (6), described projector (2) is provided with the lasing light emitter (7) matched with light activated element (6), and described light activated element (6) is connected with the first lead screw motor and the second lead screw motor respectively.
5. teaching board book projector mechanism according to claim 2, it is characterized in that: on the projection lens (2.1) of projector (2), be provided with lens cap (2.2), when suspending projection or terminate projection, projection lens (2.1) is blocked with lens cap (2.2), lasing light emitter (7) touches light activated element (6), controls by light activated element (6) dead ahead that the second lead screw motor moves to white removable background board (4).
6. teaching board book projector mechanism according to claim 2, it is characterized in that: when starting projection or continuing projection, open lens cap (2.2), light activated element (6) is touched by lasing light emitter (7), light activated element (6) controls the first lead screw motor and the second lead screw motor, make white removable background board (4) and the removable background board of black (3) sequence, projector (2) is projected on white removable background board (4).
7. teaching board book projector mechanism according to claim 1 and 2, is characterized in that: described in make writing on the blackboard projection plate (1) transparent material can realize the diffuse reflection of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727030.2A CN104330949B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projector mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727030.2A CN104330949B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projector mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104330949A true CN104330949A (en) | 2015-02-04 |
| CN104330949B CN104330949B (en) | 2016-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410727030.2A Expired - Fee Related CN104330949B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projector mechanism |
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| Country | Link |
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| CN (1) | CN104330949B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427681A (en) * | 2015-12-08 | 2016-03-23 | 成都大学 | Mobile multimedia teaching system |
| CN106327927A (en) * | 2016-10-28 | 2017-01-11 | 高翔 | Teaching aid of presentation of mathematical function curve |
| CN111489594A (en) * | 2020-05-09 | 2020-08-04 | 兰州石化职业技术学院 | Man-machine interaction platform |
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| JP2004233584A (en) * | 2003-01-29 | 2004-08-19 | Ricoh Co Ltd | Light controllable screen device equipped with writing section |
| CN202283843U (en) * | 2011-11-10 | 2012-06-27 | 西南石油大学 | Push-pull type blackboard and projecting white board |
| CN202337130U (en) * | 2011-11-04 | 2012-07-18 | 赵林福 | Intelligent lighting system for movable blackboard |
| CN202911381U (en) * | 2012-12-03 | 2013-05-01 | 佳木斯大学 | Teaching blackboard for higher mathematics |
| CN104129205A (en) * | 2014-07-15 | 2014-11-05 | 浙江工业大学 | Automatic cleaning blackboard |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204215139U (en) * | 2014-12-03 | 2015-03-18 | 中国计量学院 | A kind of teaching board book projector mechanism |
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2014
- 2014-12-03 CN CN201410727030.2A patent/CN104330949B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004233584A (en) * | 2003-01-29 | 2004-08-19 | Ricoh Co Ltd | Light controllable screen device equipped with writing section |
| CN202337130U (en) * | 2011-11-04 | 2012-07-18 | 赵林福 | Intelligent lighting system for movable blackboard |
| CN202283843U (en) * | 2011-11-10 | 2012-06-27 | 西南石油大学 | Push-pull type blackboard and projecting white board |
| CN202911381U (en) * | 2012-12-03 | 2013-05-01 | 佳木斯大学 | Teaching blackboard for higher mathematics |
| CN104129205A (en) * | 2014-07-15 | 2014-11-05 | 浙江工业大学 | Automatic cleaning blackboard |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427681A (en) * | 2015-12-08 | 2016-03-23 | 成都大学 | Mobile multimedia teaching system |
| CN106327927A (en) * | 2016-10-28 | 2017-01-11 | 高翔 | Teaching aid of presentation of mathematical function curve |
| CN111489594A (en) * | 2020-05-09 | 2020-08-04 | 兰州石化职业技术学院 | Man-machine interaction platform |
| CN111489594B (en) * | 2020-05-09 | 2022-02-18 | 兰州石化职业技术学院 | Man-machine interaction platform |
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| Publication number | Publication date |
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| CN104330949B (en) | 2016-10-26 |
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