CN2120350U - Electric controlling apparatus for screen - Google Patents
Electric controlling apparatus for screen Download PDFInfo
- Publication number
- CN2120350U CN2120350U CN 92213508 CN92213508U CN2120350U CN 2120350 U CN2120350 U CN 2120350U CN 92213508 CN92213508 CN 92213508 CN 92213508 U CN92213508 U CN 92213508U CN 2120350 U CN2120350 U CN 2120350U
- Authority
- CN
- China
- Prior art keywords
- spool
- tack
- motor
- connects
- screen
- 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.)
- Pending
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- Overhead Projectors And Projection Screens (AREA)
Abstract
The utility model belongs to a device used for screen projection, and specifically relates to a control device for screen used for electrical teaching. The utility model is characterized in that the control device for screen comprise a shell, a tack-up spool and a control circuit, and the tack-up spool and the control circuit are inside the shell; one end of the shell is provided with an electric motor, the output shaft of the electric motor is connected with a drive member, and the drive member is composed of a screw rod and a slide plate which is connected with the screw rod by screw threads; the other end of the drive member is connected with the tack-up spool, and a limited plate provided with a slide groove and limit switches is arranged above the screw rod; the slide groove is extended from the L-shaped end of the upper part of the slide plate, and is positioned between two limit switches.
Description
The utility model belongs to a kind of device of screen projection usefulness, the screen control device that specifically a kind of electronic teaching is used.
At present, the general utmost point and the raising of modern educational technology all attached great importance in countries in the world, and electronic teaching is one of its representative.As the teaching screen of electronic teaching apparatus, directly can have influence on the raising of the level of electronic teaching.The existing teaching screen overwhelming majority adopts the form that pulls expansion, spring volume Tibetan, during use, pulls it and fixes with hand, after the use, utilizes spring force that the screen volume is hidden in the screen housing.This mode is trouble, especially the screen broad, when longer, trouble more.
The purpose of this utility model provides electric projection screen control device a kind of simple in structure, easy to operate.
Characteristics of the present utility model are to be made of with control circuit housing 4 and inner tack-up spool 5 thereof, end at housing 4 has motor 10, the output shaft of motor 10 connects by screw mandrel 7 and with driving member that screw mandrel 7 is formed with the slide plate 8 of thread connection with one, the driving member other end connects with tack-up spool 5, a band chute 9 is arranged above screw mandrel 7 and work the groove 11 of the position of installing and debugging limit switch 6 and the limiting plate 12 of limit switch 6, " L " type end on slide plate 8 tops stretches out chute 9, and between two limit switches 6., wherein connect with electromagnet 1 on being fixed on housing 4 with the cylinder 2 of groove by a braking head of forming with two cylinders 2,3 of groove and boss respectively at the other end of tack-up spool 5, another cylinder 3 connects with tack-up spool 5.In control circuit, an A end that connects toggle switch of input power cord, what connect motor 10 behind the A-a termination upper limit position switch 6-1 again rotates counterclockwise terminals and B-a end, what connect motor 10 behind the A-c termination lower position switch 6-2 clockwise rotates terminals and B-c end, toggle switch B termination electromagnet 1, another root power input line connect electromagnet 1 and motor 10.
During use, press toggle switch, make A-a end and the conducting of B-a end, motor M(is 10 among Fig. 1) rotate counterclockwise, drive tack-up spool 5 by screw mandrel 7 and rotate, simultaneously, slide plate 8 is done axially-movable on screw mandrel 7, when " L " type end on the slide plate 8 slides into limit switch 6, motor 10 stalls, electromagnet 1 outage, slide block above it stretches out under spring action, promote cylinder 2, the groove on the cylinder 2 is embedded on the boss of cylinder 3, tack-up spool 5 is positioned.In the time of need restarting, make toggle switch place A-c, B-c end, motor clockwise rotates, and simultaneously, under the effect of electromagnet 1, cylinder 2 separates with 3.
The utility model has the advantages that easy to installly, all devices are installed in the housing of existing screen, do not need to make in addition housing, and in operating process, except that the screen course of action, all the other power supplys all are in off-state, so safe in utilization, reliable simultaneously.
Fig. 1 is structural drawing of the present utility model, i.e. Figure of abstract.
Fig. 2 is the structural drawing of limiting plate 12.
Fig. 3 is the driving member structural drawing.
Fig. 4 is braking header structure figure.
Fig. 5 is a circuit diagram.
Claims (4)
1, a kind of screen electric controller, constitute by housing 4 and inner tack-up spool 5 and control circuit thereof, it is characterized in that motor 10 being arranged at an end of housing 4, the output shaft of motor 10 connects by screw mandrel 7 and with driving member that screw mandrel 7 is formed with the slide plate 8 of thread connection with one, the other end of driving member connects with tack-up spool 5, the limiting plate 12 of a band chute 9 and limit switch 6 is arranged above screw mandrel 7, and " L " type end on slide plate 8 tops stretches out chute 9, and between two limit switches 6.
2, device according to claim 1 is characterized in that the other end at tack-up spool 5 by a braking head of forming with two cylinders 2,3 of groove and boss respectively, wherein connects with electromagnetic block 1 on being fixed on housing 4 with the cylinder 2 of groove.
3, device according to claim 1 is characterized in that the groove 11 that has to install and regulate the position of limit switch 6 on limiting plate.
4, device according to claim 1, it is characterized in that in control circuit, an A end that connects toggle switch of power input line, what connect motor 10 behind the A-a termination upper limit position switch 6-1 again rotates counterclockwise terminals and B-a end, what connect motor 10 behind the A-c termination lower position switch 6-2 clockwise rotates terminals and B-c end, toggle switch B termination electromagnet 1, the power input line of another root connect electromagnet 1 and motor 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92213508 CN2120350U (en) | 1992-03-28 | 1992-03-28 | Electric controlling apparatus for screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92213508 CN2120350U (en) | 1992-03-28 | 1992-03-28 | Electric controlling apparatus for screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2120350U true CN2120350U (en) | 1992-10-28 |
Family
ID=4958216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92213508 Pending CN2120350U (en) | 1992-03-28 | 1992-03-28 | Electric controlling apparatus for screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2120350U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197186A (en) * | 2016-08-24 | 2016-12-07 | 李汉文 | The cutting of a kind of auxiliary is with cutting chi |
| CN108153101A (en) * | 2018-02-11 | 2018-06-12 | 广州市雄云视听设备有限公司 | A kind of transversely opened and closed parallel activity hinge cuts supporting type backrush projection screen |
| CN108584747A (en) * | 2018-05-17 | 2018-09-28 | 广州市创视智能设备有限公司 | A kind of steel wire overlapping winder of screen of dynamoelectric projection |
-
1992
- 1992-03-28 CN CN 92213508 patent/CN2120350U/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197186A (en) * | 2016-08-24 | 2016-12-07 | 李汉文 | The cutting of a kind of auxiliary is with cutting chi |
| CN106197186B (en) * | 2016-08-24 | 2020-06-19 | 湖北鱼鹤制衣有限公司 | Cutting ruler for assisting cutting |
| CN108153101A (en) * | 2018-02-11 | 2018-06-12 | 广州市雄云视听设备有限公司 | A kind of transversely opened and closed parallel activity hinge cuts supporting type backrush projection screen |
| CN108153101B (en) * | 2018-02-11 | 2023-11-07 | 广州市雄云视听设备有限公司 | Support type rollback projection screen is cut to horizontal open and shut parallel activity hinge |
| CN108584747A (en) * | 2018-05-17 | 2018-09-28 | 广州市创视智能设备有限公司 | A kind of steel wire overlapping winder of screen of dynamoelectric projection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |