阅读说明：本技术 可拆卸投影幕 (Detachable projection screen ) 是由 李栋 于 2021-09-24 设计创作，主要内容包括：本发明公开了可拆卸投影幕,属于投影幕技术领域。可拆卸投影幕包括固定设置在墙体上的屏幕框,屏幕框的上边框和下边框上设有第一电磁装置,屏幕框内设有屏幕,屏幕后侧顶部和底部的后侧均设有第二电磁装置,第一电磁装置与第二电磁装置连接,使屏幕吸附在屏幕框内。本发明的投影幕便于安装与拆卸,减少了安装和拆卸的步骤,节省拆装时间,提高拆装效率。(The invention discloses a detachable projection screen, and belongs to the technical field of projection screens. Can dismantle the projection screen and including the fixed screen frame that sets up on the wall body, be equipped with first electromagnetic means on the last frame and the lower frame of screen frame, be equipped with the screen in the screen frame, the rear side of screen rear side top and bottom all is equipped with second electromagnetic means, and first electromagnetic means is connected with second electromagnetic means, makes the screen adsorb in the screen frame. The projection screen is convenient to mount and dismount, mounting and dismounting steps are reduced, dismounting time is saved, and dismounting efficiency is improved.)

1. Can dismantle projection curtain, its characterized in that: including the fixed screen frame that sets up on the wall body, be equipped with first electromagnetic means on the last frame and the lower frame of screen frame, be equipped with the screen in the screen frame, the rear side of screen rear side top and bottom all is equipped with second electromagnetic means, first electromagnetic means with second electromagnetic means connects, makes the screen adsorb in the screen frame.

2. The detachable projection screen of claim 1, wherein: the first electromagnetic device and the second electromagnetic device both comprise soft iron blocks and spiral coils, and the spiral coils are clockwise wound on the soft iron blocks.

3. The detachable projection screen of claim 1, wherein: the first electromagnetic device and the second electromagnetic device further comprise adjusting mechanisms, each adjusting mechanism comprises a controller, a transformer and a current detector, the transformer is connected with the spiral coil, the transformer is connected with the controller, the current detectors are installed on the outer sides of the spiral coils, and the current detectors are connected with the controllers.

4. The detachable projection screen of claim 1, wherein: the controller comprises a control module, a current data analysis module and a wireless communication module, wherein the control module is used for controlling the transformer to work, the current data analysis module is used for receiving current data transmitted by the current detector and analyzing the current data, and the wireless communication module is used for carrying out wireless communication with external equipment.

5. The detachable projection screen of claim 1, wherein: the current data analysis module comprises an internal current data unit, an external current data unit and an internal and external current data comparison unit, wherein the internal current data unit is used for receiving internal current data, the external current data unit is used for receiving external current data, and the internal and external current data comparison unit is used for comparing the internal current with the external current.

6. The detachable projection screen of claim 4, wherein: the remote control is connected with the controller.

7. A projection screen dismounting method is characterized in that: the method comprises the following steps:

(1) fixedly mounting a screen frame on a wall, mounting first electromagnetic devices on an upper frame and a lower frame of the screen frame, and mounting second electromagnetic devices on the rear sides of the top and the bottom of a screen and at positions corresponding to the upper frame and the lower frame of the screen frame;

(2) electrifying the solenoid coil of the first electromagnetic device, simultaneously electrifying the solenoid coil of the second electromagnetic device, correspondingly attaching the second electromagnetic device of the screen to the first electromagnetic device of the screen frame, and finishing the installation of the projection screen;

(3) when the screen needs to be replaced or moved, the solenoid coil of the first electromagnetic device and the solenoid coil of the second electromagnetic device are powered off, so that the screen can be taken down from the screen frame, and the projection screen is detached.

Technical Field

The invention relates to the technical field of material thermal decomposition, in particular to a detachable projection screen.

Background

With the rapid development of information technology, projection technology has been widely applied to multimedia education systems and office meeting systems, and projection systems generally include a projector and a projection screen, and the projection screen can be roughly classified into two categories according to the installation manner of the projection screen: the foldable projection screen can be rolled up when not in use, so that the effect of protecting the projection screen can be achieved; and does not occupy space, thus enjoying partial user preference, but still has the following disadvantages compared with a frame type projection screen: on one hand, the driving mechanism for driving the projection screen to roll needs to be designed, so that the structural design of the roll-up projection screen is more complicated than that of a frame type projection screen, the material cost, the processing cost and the maintenance cost are higher than those of the frame type projection screen, and the roll-up mechanism is easy to break down after being used for a long time, so that the fault rate is high; on the other hand, because the bottom of the projection screen is not provided with a fixing device when the foldable projection screen is unfolded, the structure of the foldable projection screen is unstable and is easily influenced by external environment (such as wind), and the projection effect of the foldable projection screen can be reduced.

Traditional frame-type projection curtain, the installation is loaded down with trivial details with the dismantlement step, is difficult for changing.

Disclosure of Invention

The invention aims to provide a detachable projection screen. The projection screen is convenient to mount and dismount, the mounting and dismounting steps are reduced, the dismounting time is saved, and the dismounting efficiency is improved, and the technical scheme adopted by the invention is as follows:

according to one aspect of the invention, the detachable projection screen is provided and comprises a screen frame fixedly arranged on a wall body, wherein first electromagnetic devices are arranged on an upper frame and a lower frame of the screen frame, a screen is arranged in the screen frame, second electromagnetic devices are arranged on the top and the rear side of the bottom of the rear side of the screen, and the first electromagnetic devices are connected with the second electromagnetic devices so that the screen is adsorbed in the screen frame.

Preferably, the first electromagnetic device and the second electromagnetic device both comprise a soft iron block and a solenoid coil, and the solenoid coil is clockwise wound on the soft iron block.

Preferably, the first electromagnetic device and the second electromagnetic device further comprise adjusting mechanisms, each adjusting mechanism comprises a controller, a transformer and a current detector, the transformer is connected with the solenoid, the transformer is connected with the controller, the current detectors are mounted on the outer sides of the solenoids, and the current detectors are connected with the controller.

Preferably, the controller includes a control module, a current data analysis module and a wireless communication module, the control module is configured to control the operation of the transformer, the current data analysis module is configured to receive current data transmitted by the current detector and analyze the current data, and the wireless communication module is configured to wirelessly communicate with an external device.

Preferably, the current data analysis module includes an internal current data unit, an external current data unit, and an internal and external current data comparison unit, where the internal current data unit is configured to receive internal current data, the external current data unit is configured to receive external current data, and the internal and external current data comparison unit is configured to compare the internal current with the external current.

Preferably, the remote control device further comprises a remote controller, and the remote controller is connected with the controller.

Preferably, the projection screen dismounting method includes the following steps:

(1) fixedly mounting a screen frame on a wall, mounting first electromagnetic devices on an upper frame and a lower frame of the screen frame, and mounting second electromagnetic devices on the rear sides of the top and the bottom of a screen and at positions corresponding to the upper frame and the lower frame of the screen frame;

(2) electrifying the solenoid coil of the first electromagnetic device, simultaneously electrifying the solenoid coil of the second electromagnetic device, correspondingly attaching the second electromagnetic device of the screen to the first electromagnetic device of the screen frame, and finishing the installation of the projection screen;

(3) when the screen needs to be replaced or moved, the solenoid coil of the first electromagnetic device and the solenoid coil of the second electromagnetic device are powered off, so that the screen can be taken down from the screen frame, and the projection screen is detached.

The technical scheme adopted by the invention has the following remarkable effects:

(1) according to the invention, the first electromagnetic device is arranged on the upper frame and the lower frame of the screen frame, the second electromagnetic device is arranged on the back sides of the top and the bottom of the screen, the solenoid coils in the first electromagnetic device and the second electromagnetic device are electrified, so that the soft iron blocks have magnetism, the current directions of the solenoid coil of the first electromagnetic device and the solenoid coil of the second electromagnetic device are the same, two opposite end parts of the two soft iron blocks are changed into different magnetic poles, and the two opposite end parts can attract each other, so that the screen is fixed on the screen frame, the mounting and dismounting are convenient, the dismounting time is saved, and the dismounting efficiency is improved;

(2) the invention also comprises an adjusting mechanism, wherein a controller of the adjusting mechanism controls the transformer to enable the solenoid coil to generate different currents, namely the magnetic size of the soft iron block can be adjusted, corresponding adjustment can be flexibly carried out according to the weight of the screen, and the adaptability is improved;

(3) the disassembly and assembly method greatly shortens the disassembly and assembly time, does not need tools for disassembly and assembly, and avoids carrying tools.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the first electromagnetic device or the second electromagnetic device of the present invention.

1-screen frame, 2-screen, 3-first electromagnetic device, 4-second electromagnetic device, 5-soft iron block, 6-solenoid.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

As shown in fig. 1, the detachable projection screen according to the present invention includes a screen frame 1 fixedly disposed on a wall, first electromagnetic devices 3 are disposed on an upper frame and a lower frame of the screen frame 1, a screen 2 is disposed in the screen frame 1, second electromagnetic devices 4 are disposed on a top and a bottom of a rear side of the screen 2, the first electromagnetic devices 3 and the second electromagnetic devices 4 include soft iron blocks 5 and spiral coils 6, and the spiral coils 6 are clockwise wound on the soft iron blocks 5. The solenoid coils 6 of the first electromagnetic device 3 and the second electromagnetic device 4 are electrified with currents in the same direction, so that the soft iron blocks of the first electromagnetic device 3 and the second electromagnetic device 4 are magnetized and have magnetism, two end parts, close to each other, of the two soft iron blocks 5 are provided with different magnetic poles, the two end parts attract each other, the first electromagnetic device 3 and the second electromagnetic device 4 are attached to each other, the screen 2 is adsorbed in the screen frame 1, and the screen 2 can be installed.

The first electromagnetic device 3 and the second electromagnetic device 4 further comprise adjusting mechanisms, each adjusting mechanism comprises a controller, a transformer and a current detector, the transformers are connected with the spiral coils 6 and the controllers, the current detectors are mounted on the outer sides of the spiral coils 6, and the current detectors are connected with the controllers. The current detector detects the current of the solenoid coil 6, and the controller can control the voltage of the transformer to rise and fall according to the requirement, so that the current of the solenoid coil 6 is controlled, and the magnetic strength of the first electromagnetic device 3 or the second electromagnetic device 4 is controlled.

The controller comprises a control module, a current data analysis module and a wireless communication module, wherein the control module is used for controlling the transformer to work, the current data analysis module is used for receiving current data transmitted by the current detector and analyzing the current data, and the wireless communication module is used for carrying out wireless communication with external equipment. The current data analysis module comprises an internal current data unit, an external current data unit and an internal and external current data comparison unit, wherein the internal current data unit is used for receiving internal current data, the external current data unit is used for receiving external current data, and the internal and external current data comparison unit is used for comparing the internal current with the external current. An internal current data unit on the first electromagnetic device 3 is used for receiving current data inside the first electromagnetic device 3, an external current data unit on the first electromagnetic device 3 is used for receiving internal current data of the second electromagnetic device 4, an internal and external current data comparison unit of the first electromagnetic device 3 compares the current inside the first electromagnetic device 3 with the current of the second electromagnetic device 4, current information is transmitted to a controller of the first electromagnetic device 3, a transformer is controlled by the controller, and further the current inside the first electromagnetic device 3 is changed, similarly, the second electromagnetic device 4 controls the internal current, the two electromagnetic devices can adjust the current according to actual conditions, so that the magnetic force of the first electromagnetic device 3 and the second electromagnetic device 4 is strong enough, the two electromagnetic devices can attract each other only by using a small amount of current, and the magnetic force is stronger than that when a single electromagnetic device is used, is more stable, reduces energy consumption, is convenient and is environment-friendly.

The remote control is connected with the controller.

A projection screen dismounting method comprises the following steps:

(1) fixedly mounting a screen frame 1 on a wall body, mounting first electromagnetic devices 3 on an upper frame and a lower frame of the screen frame 1, and mounting second electromagnetic devices 4 on the rear sides of the top and the bottom of a screen 2 and at positions corresponding to the upper frame and the lower frame of the screen frame 1;

(2) electrifying the solenoid coil 6 of the first electromagnetic device 3, simultaneously electrifying the solenoid coil 6 of the second electromagnetic device 4, correspondingly attaching the second electromagnetic device 4 of the screen 2 and the first electromagnetic device 3 of the screen frame 1, and finishing the installation of the projection screen;

(3) when the screen 2 needs to be replaced or moved, the solenoid coil 6 of the first electromagnetic device 3 and the solenoid coil 6 of the second electromagnetic device 4 are powered off, so that the screen 2 can be taken down from the screen frame 1, and the detachment of the projection screen is completed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.