CN203909465U - Projection screen driven by light-operated tubular motor - Google Patents
Projection screen driven by light-operated tubular motor Download PDFInfo
- Publication number
- CN203909465U CN203909465U CN201420358202.9U CN201420358202U CN203909465U CN 203909465 U CN203909465 U CN 203909465U CN 201420358202 U CN201420358202 U CN 201420358202U CN 203909465 U CN203909465 U CN 203909465U
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- China
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- photoelectric sensor
- projection screen
- arithmetical unit
- screen body
- light
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Abstract
The utility model discloses a projection screen driven by a light-operated tubular motor. According to the utility model, the problem that the projection screen cannot be retracted and released automatically by the tubular motor applied to the projection screen can be solved. The projection screen driven by a light-operated tubular motor comprises a tubular motor and a projection screen body, and further comprises a logical operation circuit. The projection screen body is provided with an upper photoelectric sensor, a middle photoelectric sensor and a lower photoelectric sensor. A high level is generated by the photoelectric sensor when the photoelectric sensor is illuminated by a projector. The upper photoelectric sensor is arranged on the top portion of the projection screen body. The middle photoelectric sensor is arranged on the bottom portion of the projection screen body. The lower photoelectric sensor is arranged on an installation portion formed by extending the bottom portion of the projection screen body downwards. The logical operation circuit comprises a NOT gate operator, an AND gate operator and a NOR gate operator. The photoelectric sensors, the operators and the tubular motor are in electrical connection. After illumination is started by the projector, level signals are generated by the three photoelectric sensors according to the illumination condition, and the level signals are processed by the logical operation circuit so as to make the light-operated tubular motor drive the projection screen body to move to an appropriate position.
Description
Technical field
The utility model relates to the motor-driven projection screen of a kind of light-operated tubulose.
Background technology
Tube shaped electric machine is often applied to controlling on the projection screen matching with projector, and existing projection screen needs the folding and unfolding of manual control projection screen, comparatively inconvenience.
Summary of the invention
The object that the utility model will reach is to provide the motor-driven projection screen of a kind of light-operated tubulose, can be according to the switching automatic deploying and retracting projection screen of projector.
In order to achieve the above object, the utility model adopts following technical scheme: the motor-driven projection screen of light-operated tubulose, comprise tube shaped electric machine and projection screen body, also comprise logical operation circuit, projection screen body is provided with photoelectric sensor, middle photoelectric sensor and lower photoelectric sensor, photoelectric sensor is subject to projector light according to producing high level, upper photoelectric sensor is located at projection screen body top, middle photoelectric sensor is located at projection screen body bottom, lower photoelectric sensor is located at projection screen body bottom on the installation portion of downward-extension, logical operation circuit comprises not gate arithmetical unit, with door arithmetical unit and rejection gate arithmetical unit, upper photoelectric sensor is connected to the input end with door arithmetical unit by not gate arithmetical unit, lower photoelectric sensor is connected to the input end with door arithmetical unit, middle photoelectric sensor is connected to the input end of rejection gate arithmetical unit, be connected to input end and the tube shaped electric machine of rejection gate arithmetical unit with the output terminal of door arithmetical unit, the output terminal of rejection gate arithmetical unit is connected to tube shaped electric machine, can make tube shaped electric machine drive projection screen body to move down expansion with door arithmetical unit output high level, rejection gate arithmetical unit output high level can make tube shaped electric machine drive the gathering that moves up of projection screen body.
Further, described projection screen body is provided with chute and slip lid, and photoelectric sensor is located in chute, and slip lid can slide into the position that covers photoelectric sensor along chute.Desirable delustring electric control, changes artificial directly control into.
Adopt after technique scheme, the utlity model has following advantage:
After projector start to irradiate, three photoelectric sensors according to be subject to light to send level signal and by logical operation circuit, processed after make light-operated tube shaped electric machine drive projection screen body to move to suitable position.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the schematic diagram of a kind of embodiment of the utility model;
Fig. 2 is the enlarged drawing of a-quadrant in Fig. 1;
Fig. 3 is the connection diagram of photoelectric sensor, logical operation circuit in Fig. 1 embodiment;
Table 1 is the projection screen body motion state that photoelectric sensor level state is corresponding.
Embodiment
Fig. 1-3 are depicted as a kind of embodiment of the present utility model.
| Group | Upper photoelectric sensor | Middle photoelectric sensor | Lower photoelectric sensor | Projection screen body state |
| A group | Low level | Low level | Low level | On move |
| B group | Low level | Low level | High level | Move down |
| C group | Low level | High level | Low level | Shut down |
| D group | Low level | High level | High level | Move down |
| E group | High level | Low level | Low level | On move |
| F group | High level | Low level | High level | Shut down |
| G group | High level | High level | Low level | Shut down |
| H group | High level | High level | High level | Shut down |
Table 1: the projection screen body motion state that photoelectric sensor level state is corresponding
The projection screen that light-operated tube shaped electric machine 7 drives, comprise tube shaped electric machine 7 and projection screen body 8, also comprise logical operation circuit, projection screen body 8 is provided with photoelectric sensor 1, middle photoelectric sensor 2 and lower photoelectric sensor 3 photoelectric sensors are subject to projector light according to producing high level, upper photoelectric sensor 1 is located at projection screen body 8 tops, middle photoelectric sensor 2 is located at projection screen body 8 bottoms, lower photoelectric sensor 3 is located at projection screen body 8 bottoms on the installation portion 9 of downward-extension, logical operation circuit comprises not gate arithmetical unit 6, with door arithmetical unit 4 and rejection gate arithmetical unit 5, upper photoelectric sensor 1 is connected to the input end with door arithmetical unit 4 by not gate arithmetical unit 6, lower photoelectric sensor 3 is connected to the input end with door arithmetical unit 4, middle photoelectric sensor 2 is connected to the input end of rejection gate arithmetical unit 5, be connected to input end and the tube shaped electric machine 7 of rejection gate arithmetical unit 5 with the output terminal of door arithmetical unit 4, the output terminal of rejection gate arithmetical unit 5 is connected to tube shaped electric machine 7, can make tube shaped electric machine 7 drive projection screen body 8 to move down expansion with door arithmetical unit 4 output high level, rejection gate arithmetical unit 5 output high level can make tube shaped electric machine 7 drive projection screen bodies 8 gathering that moves up.
Under projection screen body 8 rounding states, upper photoelectric sensor 1, middle photoelectric sensor 2 are all incorporated into dark place, only being located at projection screen body 8 bottoms can be by illumination to the lower photoelectric sensor 3 of the installation portion 9 of downward-extension, projector starts/maintains/closes under illumination state, photoelectric sensor is given an order by light to make tube shaped electric machine 7 to drive projection screen bodies 8 to change or is maintained motion state, three total following eight groups of states of photoelectric sensors:
A group, projector cuts out, low level that upper photoelectric sensor is unglazed, middle photoelectric sensor is unglazed low level, lower photoelectric sensor is unglazed low level, with door arithmetical unit output low level, rejection gate arithmetical unit output high level, makes tube shaped electric machine drive projection screen body to move up and draws in until draw projection screen body completely in.
B group, projection screen body starts projector while being drawn in completely, low level that upper photoelectric sensor is unglazed, middle photoelectric sensor is unglazed low level, lower photoelectric sensor are subject to light high level, with door arithmetical unit output high level, rejection gate arithmetical unit output low level, makes tube shaped electric machine drive projection screen body to move down expansion.
C group; projector light illumination range is less; lower photoelectric sensor under projection screen body has shifted out projector light illumination range; and photoelectric sensor does not also enter illumination range; now the illumination range of projector all falls in projection screen body, and low level that low level that upper photoelectric sensor is unglazed, middle photoelectric sensor are subject to light high level, lower photoelectric sensor is unglazed, with door arithmetical unit output low level; rejection gate arithmetical unit output low level, tube shaped electric machine is shut down.
D group, in the folding process of projection screen body, middle photoelectric sensor, lower photoelectric sensor are all in projector light illumination range, low level that upper photoelectric sensor is unglazed, middle photoelectric sensor are subject to light high level, lower photoelectric sensor to be subject to light high level, with door arithmetical unit output high level, rejection gate arithmetical unit output low level, makes tube shaped electric machine drive projection screen body to move down expansion.
E group, projection screen body moves down excessively, middle photoelectric sensor, lower photoelectric sensor all shift out projector light illumination range, low level that upper photoelectric sensor is subject to light high level, middle photoelectric sensor is unglazed, lower photoelectric sensor is unglazed low level, with door arithmetical unit output low level, rejection gate arithmetical unit output high level, makes tube shaped electric machine drive projection screen body to move up and does certain return.
F group; this state normal condition can not occur; go up photoelectric sensor, lower photoelectric sensor in projector light illumination range; and middle photoelectric sensor does not exist, low level that upper photoelectric sensor is subject to light high level, middle photoelectric sensor is unglazed, lower photoelectric sensor are subject to light high level, and this state can only be malfunction; thereby tube shaped electric machine need be shut down maintenance; with door arithmetical unit output low level, rejection gate arithmetical unit output low level, tube shaped electric machine is shut down.
G group; this group state is optimum state; projection screen body is displaced downwardly to correct position; upper photoelectric sensor, middle photoelectric sensor are in projector light illumination range; and lower photoelectric sensor just in time shifts out projector light illumination range; now the illumination range of projector all falls in projection screen body; low level that upper photoelectric sensor is subject to that light high level, middle photoelectric sensor are subject to light high level, lower photoelectric sensor is unglazed; with door arithmetical unit output low level; rejection gate arithmetical unit output low level, tube shaped electric machine is shut down.
H group; projection screen body has been displaced downwardly to the limit; upper photoelectric sensor, middle photoelectric sensor, lower photoelectric sensor are all in projector light illumination range; upper photoelectric sensor is subject to light high level, middle photoelectric sensor to be subject to light high level, lower photoelectric sensor to be subject to light high level; with door arithmetical unit output low level; rejection gate arithmetical unit output low level, tube shaped electric machine is shut down.
Projection screen body 8 is provided with chute 10 and slip lid 11, and photoelectric sensor is located in chute 10, and slip lid 11 can slide into the position that covers photoelectric sensor along chute 10, thereby desirable delustring electric control changes artificial directly control into.
Except above preferred embodiment, the utility model also has other embodiment, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (2)
1. the motor-driven projection screen of light-operated tubulose, comprise tube shaped electric machine (7) and projection screen body (8), it is characterized in that: also comprise logical operation circuit, projection screen body is provided with photoelectric sensor (1), middle photoelectric sensor (2) and lower photoelectric sensor (3), photoelectric sensor is subject to projector light according to producing high level, upper photoelectric sensor is located at projection screen body top, middle photoelectric sensor is located at projection screen body bottom, lower photoelectric sensor is located at projection screen body bottom on the installation portion (9) of downward-extension, logical operation circuit comprises not gate arithmetical unit (6), with door arithmetical unit (4) and rejection gate arithmetical unit (5), upper photoelectric sensor is connected to the input end with door arithmetical unit by not gate arithmetical unit, lower photoelectric sensor is connected to the input end with door arithmetical unit, middle photoelectric sensor is connected to the input end of rejection gate arithmetical unit, be connected to input end and the tube shaped electric machine of rejection gate arithmetical unit with the output terminal of door arithmetical unit, the output terminal of rejection gate arithmetical unit is connected to tube shaped electric machine, can make tube shaped electric machine drive projection screen body to move down expansion with door arithmetical unit output high level, rejection gate arithmetical unit output high level can make tube shaped electric machine drive the gathering that moves up of projection screen body.
2. the motor-driven projection screen of light-operated tubulose according to claim 1, it is characterized in that: described projection screen body is provided with chute (10) and slip lid (11), photoelectric sensor is located in chute, and slip lid can slide into the position that covers photoelectric sensor along chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358202.9U CN203909465U (en) | 2014-06-30 | 2014-06-30 | Projection screen driven by light-operated tubular motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358202.9U CN203909465U (en) | 2014-06-30 | 2014-06-30 | Projection screen driven by light-operated tubular motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909465U true CN203909465U (en) | 2014-10-29 |
Family
ID=51783723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420358202.9U Withdrawn - After Issue CN203909465U (en) | 2014-06-30 | 2014-06-30 | Projection screen driven by light-operated tubular motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203909465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090455A (en) * | 2014-06-30 | 2014-10-08 | 浙江湖州森富机电有限责任公司 | Projection screen driven by photran-shaped motor |
| CN106406009A (en) * | 2016-11-25 | 2017-02-15 | 盐城工学院 | Elastic touch control pedestal for electric projection screen |
-
2014
- 2014-06-30 CN CN201420358202.9U patent/CN203909465U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090455A (en) * | 2014-06-30 | 2014-10-08 | 浙江湖州森富机电有限责任公司 | Projection screen driven by photran-shaped motor |
| CN104090455B (en) * | 2014-06-30 | 2016-02-10 | 浙江湖州森富机电有限责任公司 | The motor-driven projection screen of light-operated tubulose |
| CN106406009A (en) * | 2016-11-25 | 2017-02-15 | 盐城工学院 | Elastic touch control pedestal for electric projection screen |
| CN106406009B (en) * | 2016-11-25 | 2018-06-29 | 盐城工学院 | A kind of elastic touch-control pedestal for electric projecting curtain |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |