CN217213430U

CN217213430U - Improved generation magnetic induction formula projection curtain control mechanism

Info

Publication number: CN217213430U
Application number: CN202123419237.8U
Authority: CN
Inventors: 杨飞; 王浩东; 周德安
Original assignee: Yancheng Tianyue Xianfeng Electronic Technology Co ltd
Current assignee: Yancheng Tianyue Xianfeng Electronic Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-16
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to a projection equipment technical field, concretely relates to improved generation magnetic induction formula projection curtain control mechanism. Including connecting axle, magnet, first hall sensor, second hall sensor, the control unit, connecting axle and driving motor's output shaft and synchronous rotation, the cover is equipped with the go-between on the connecting axle, install bellied magnet on the go-between, first hall sensor and second hall sensor install asymmetrically near the go-between, and with rotatory magnet between have the clearance, first hall sensor and second hall sensor pass through the wire with the signal of telecommunication and transmit for the control unit can judge the direction of rotation of connecting axle through two hall sensor's signal precedence order, has stopped someone and has manually dragged the curtain and lead to the problem of the indiscriminate final unable complete rolling of signal, more reliable and more stable in the use.

Description

Improved generation magnetic induction formula projection curtain control mechanism

Technical Field

The utility model relates to a projection equipment technical field, concretely relates to improved generation magnetism formula projection curtain control mechanism of feeling.

Background

Projection screens, used in conjunction with projectors, are tools for displaying images and video files in a wide variety of sizes, used in movies, offices, home theaters, large conferences, and the like. The projection curtain keeps clean in order to save office space when not using, and the projection curtain rolls up.

In order to ensure that the projection screen stops rotating when the projection screen rises and falls to the limit position, an electric screen travel limit controller is often adopted in the industry. The electric curtain travel limit controller is used for controlling the curtain motor to stop working when the projection curtain ascends or descends in place, and is also used for adjusting the length of the curtain. At present, an electric curtain travel limit controller is generally adopted, is arranged at one end of a cloth shaft of a support frame at the upper end of a projector curtain and is of a mechanical structure, and two nut type disconnection contacts are arranged at two ends of a screw rod. However, the electric curtain travel limit controller is easy to cause mechanical failure after long-term use, the replacement cost is high, and the adjustment after replacement needs to be carried out by means of a specification and an adjusting rod, so that the operation is complex.

In order to solve the above problems, my company has developed a magnetic induction type projection screen control mechanism. The concrete special number is CN201920983625.2, through single hall sensor statistics the rotation number of turns of cloth axle, but have following problem, at the in-process of rolling, if someone drags the curtain, lead to the curtain to be pulled out in reverse, then can't distinguish forward or the reversal, finally lead to the curtain can not the rolling completely.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: in the rolling process in the prior art, if someone pulls, the phenomenon that the curtain can not be completely rolled can appear, and the improved generation magnetic induction type projection curtain control mechanism capable of identifying positive and negative rotation and performing circle number compensation is provided

The utility model discloses a following technical scheme realizes, a formula projection curtain control mechanism is felt to improved generation magnetism, including connecting axle, magnet, first hall sensor, second hall sensor, the control unit, connecting axle and driving motor' S output shaft and synchronous rotation, the cover is equipped with the go-between on the connecting axle, install bellied magnet on the go-between, magnet is the S utmost point or the N utmost point apart from the connecting axle, first hall sensor and second hall sensor install near the go-between, and have the clearance between the rotatory magnet, first hall sensor and second hall sensor are asymmetric for the connecting axle and arrange, first hall sensor and second hall sensor pass through wire and the control unit electric connection, the control unit and driving motor electric connection.

The driving motor is characterized by further comprising a bottom plate, the bottom plate is installed on the end face of the driving motor through a screw, and the first Hall sensor and the second Hall sensor are installed on the bottom plate through a set screw.

Further, the connecting shaft is installed between the output shaft of the driving motor and the cloth shaft of the projection screen.

Further, the first hall sensor and the second hall sensor are at 90 ° with respect to the connecting shaft.

The utility model has the advantages that:

the utility model discloses be equipped with two hall sensor, when the connecting axle is rotatory, first hall sensor and second hall sensor can produce periodic signal separately, give the control unit with above information transfer, every rotatory a week of driving motor, first hall sensor and second hall sensor detect a signal separately, and the direction of rotation of connecting axle can be judged to signal precedence order through two hall sensor, if someone pulls the curtain in the curtain rolling process, the connecting axle upset, then the unusual number of turns of rotation of control unit can be recorded, carry out the number of turns compensation in follow-up rolling process, stopped someone and manually pulled the curtain and lead to the problem of the indiscriminate final unable complete rolling of signal, more reliable and more stable in the use.

Drawings

Fig. 1 is a schematic perspective view of the improved magnetic induction type projection screen control mechanism of the present invention connected to a driving motor;

fig. 2 is a schematic diagram of a control unit of the improved magnetic induction type projection screen control mechanism according to the present invention.

In the figure: 1 connecting a shaft; 2, a magnet; 3 a first hall sensor; 4 a second hall sensor; 5 a control unit; 6 driving the motor; 7, a bottom plate; 8 power supply.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 1-2, an improved magnetic induction type projection curtain control mechanism comprises a connecting shaft 1, a magnet 2, a first hall sensor 3, a second hall sensor 4, and a control unit 5, wherein the connecting shaft 1 is connected with an output shaft of a driving motor 6 and synchronously rotates, the connecting shaft 1 is sleeved with a connecting ring, the connecting ring is provided with a convex magnet 2, the farthest end of the magnet 2 away from the connecting shaft 1 is an S pole or an N pole, the first hall sensor 3 and the second hall sensor 4 are installed near the connecting ring and have a gap with the rotating magnet 2, the first hall sensor 3 and the second hall sensor 4 are asymmetrically arranged relative to the connecting shaft 1, the first hall sensor 3 and the second hall sensor 4 transmit an electric signal to the control unit 5 through a lead, and the control unit 5 is connected with the driving motor 6, and controls the forward rotation, reverse rotation and stop.

In practical application, the control unit 5 comprises a switching power supply circuit, a singlechip, a relay and a motor starting capacitor, the switch power supply circuit is connected with the power supply 8 through a fuse, the switch power supply circuit is provided with power failure detection, the switching power supply circuit comprises an upward key and a downward key, the first Hall sensor 3 and the second Hall sensor 4 detect the rotation turns of the driving motor 6, and judges whether the connecting shaft 1 rotates forwards or backwards according to the sequence of the signals, the singlechip stores an upper boundary point, a lower boundary point, the number of rotation turns and the rotation direction, and sends signals to the relays, the relays are two, namely a forward relay and a reverse relay, the forward relay and the reverse relay control the motor to start the capacitor, and finally control the forward rotation, the overturn and the stop of the driving motor 6.

In practical application, the sensor further comprises a bottom plate 7, the bottom plate 7 is mounted on the end face of the driving motor 6 through screws, and the first hall sensor 3 and the second hall sensor 4 are mounted on the bottom plate 7 through set screws.

In practical application, the connecting shaft 1 is installed between the output shaft of the driving motor 6 and the cloth shaft of the projection screen.

In practical application, the power supply 8 is an 85-265V alternating current power supply, and the driving motor 6 is a 220V alternating current synchronous motor.

In practical application, the first hall sensor 3 and the second hall sensor 4 are at 90 ° with respect to the connecting shaft 1.

The utility model discloses a theory of operation:

the switch power supply circuit comprises an up key and a down key, and the up key can be rolled up by clicking and then stopped pressing; the unreeling can be realized by pressing the down key, and then the unreeling is stopped by pressing; the long-press up key can record the upper boundary point and the lower boundary point.

When the connecting shaft 1 rotates, the first Hall sensor 3 and the second Hall sensor 4 can generate periodic signals respectively, the above information is transmitted to the control unit 7, each time the driving motor 1 rotates for a circle, the first Hall sensor 3 and the second Hall sensor 4 detect a signal respectively, the rotating direction of the connecting shaft 1 can be judged according to the signal sequence of the two Hall sensors, if a person pulls the curtain in the curtain winding process, the connecting shaft 1 is turned, the control unit can record the number of abnormal rotation turns, the number of turns is compensated in the subsequent winding process, and the problem that the person pulls the curtain manually to cause the signal disorder and finally cannot be wound completely is solved.

The utility model discloses a working process:

1) switching on a power supply, clicking an upward key and a downward key of the controller to wind the lower end of the curtain on a proper upper boundary, clicking the upward key and the downward key of the controller again, and stopping;

2) pressing the up key of the controller for more than 3s for a long time, and storing an upper boundary point;

3) clicking a down key of the controller, when the curtain reaches a proper length or the lower end of the curtain reaches a bottom limit position, clicking the down key of the controller again, and stopping;

4) long pressing the up key of the controller for more than 3s, and storing a lower boundary point;

5) when the single chip microcomputer is normally used, the single chip microcomputer receives a signal of clicking again, or judges that the upper boundary point and the lower boundary point are reached, and the driving motor is cut off to operate.

To sum up, an improved generation magnetic induction formula projection curtain control mechanism have simple structure, use stable advantage.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the present invention is to provide a person skilled in the art with the ability to understand the contents of the present invention and implement the same, and not to limit the scope of the present invention.

Claims

1. The utility model provides an improved generation magnetic induction formula projection screen control mechanism which characterized in that: the magnetic coupling device comprises a connecting shaft (1), a magnet (2), a first Hall sensor (3), a second Hall sensor (4) and a control unit (5), wherein the connecting shaft (1) is connected with an output shaft of a driving motor (6) and synchronously rotates, the connecting shaft (1) is sleeved with a connecting ring, the connecting ring is provided with the convex magnet (2), the magnet (2) is far away from the connecting shaft (1) and is an S pole or an N pole, the first Hall sensor (3) and the second Hall sensor (4) are installed near the connecting ring and have a gap with the rotating magnet (2), the first Hall sensor (3) and the second Hall sensor (4) are asymmetrically arranged relative to the connecting shaft (1), and the first Hall sensor (3) and the second Hall sensor (4) are electrically connected with the control unit (5) through wires, the control unit (5) is electrically connected with the driving motor (6).

2. The improved magnetic induction type projection screen control mechanism as claimed in claim 1, characterized in that: the sensor is characterized by further comprising a bottom plate (7), wherein the bottom plate (7) is installed on the end face of the driving motor (6) through a screw, and the first Hall sensor (3) and the second Hall sensor (4) are installed on the bottom plate (7) through set screws.

3. The improved magnetic induction type projection screen control mechanism as claimed in claim 1, wherein: the connecting shaft (1) is installed between the output shaft of the driving motor (6) and the cloth shaft of the projection screen.

4. The improved magnetic induction type projection screen control mechanism as claimed in claim 1, wherein: the first Hall sensor (3) and the second Hall sensor (4) are arranged at an angle of 90 degrees relative to the connecting shaft (1).