Patent Application
20110235173
1. Field of Invention
The present invention relates to a projection screen, and more particularly to a cabinet projection screen with an automatic cover-lifting function.
2. Related Art
Currently, a projector is generally used for product, plan, picture, or video presentation during activities such as business conference, teaching demonstration, and mobile office, so as to achieve a large-screen display function. The screen of the projector is usually suspended in an office or some special sites for use due to its large area. However, with the increasingly growing house price in urban areas, the work area or living area of people becomes more and more limited, and as the conventional projection screen needs to occupy a specific position, inconveniences are resulted in the already limited work or living space of people. Therefore, versatile office furniture is urgently needed in houses or offices, so as to realize as many functions as possible, especially the projection function, in a small space.
The present invention is directed to a cabinet projection screen with an automatic cover-lifting function. The cabinet projection screen can be used as a normal office desk or cabinet when not used for projection, and can also be used as a projection screen when necessary, so that a multi-functional office desk or cabinet is obtained.
In order to solve the above technical problem, the present invention provides a cabinet projection screen with an automatic cover-lifting function, which includes a cabinet body. A cover-lifting mechanism is disposed on the cabinet body. The cover-lifting mechanism includes a cover plate, a transmission rod, and a cover-plate drive motor. The cover-plate drive motor drives the cover plate to open or close through the transmission rod. An elevator screen is disposed inside the cabinet body. The elevator screen is aligned with an opening on the cabinet corresponding to the cover plate when the cover plate is opened.
A controller is further disposed on the cabinet body. A limit signal triggering member is disposed on the cover-lifting mechanism. The limit signal triggering member sends a limit signal to the controller when the cover plate rotates to a predetermined position. The controller controls actions of the cover-lifting drive motor.
The elevator screen includes a projection screen, a scroll, a scroll motor driving the scroll to rotate, and a compression frame. The scroll is disposed inside the cabinet body. The projection screen is wound on the scroll. One end of the compression frame is fixed on a free end of the projection screen and the other end thereof is fixed inside the cabinet body. Adjacent support rods are connected through a rotating shaft. An elastic mechanism is installed on the compression frame. Two ends of the elastic mechanism are installed on the adjacent support rods, respectively.
A top cover is disposed at an upper end of the compression frame.
A projection-screen limit-signal triggering member is disposed on the support rod. The projection-screen limit-signal triggering member sends a limit signal to the controller when the projection screen moves to a predetermined position. The controller controls actions of the scroll motor.
An infrared receiver is disposed on the cabinet body. The infrared receiver receives a control signal from a remote control, so as to control the scrolling motor and/or the scroll motor to perform corresponding actions through the controller.
The cover-lifting mechanism and the elevator screen are disposed inside an independent case body. The case body is movably disposed on the cabinet body.
The present invention has the following efficacy. The cabinet projection screen can be used as a normal office desk or cabinet when not used for projection, and can also be used as a projection screen when necessary, so that a multi-functional office desk or cabinet is obtained.
The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein:
Referring to
In the present invention, as shown in
A controller 4 is further disposed on the cabinet body 1. A limit signal triggering member (not shown) is disposed on the cover-lifting mechanism 2. The limit signal triggering member sends a limit signal to the controller 4 when the cover plate 21 rotates to a predetermined position. The controller 4 controls actions of the cover-lifting drive motor 23. Specifically, when the cover plate 21 is opened and rotates for 90 degrees, or when the cover plate 21 is closed to cover the opening 24, the limit signal triggering member sends a limit signal to the controller 4. The controller 4 controls the cover-lifting drive motor 23 to drive motor 23 to perform corresponding actions. In this embodiment, the limit signal triggering member may be two contacts or other elements, such as a photoelectric switch or a travel switch.
Referring to
An infrared receiver is disposed on the cabinet body. The infrared receiver receives a control signal from a remote control, so as to control the scrolling motor 23 and/or the scroll motor 32 to perform corresponding actions through the controller 4.
The examples in the above embodiments are merely the most preferred examples for illustrating the present invention and are not intended to limit the scope of the invention. Any slight changes or replacements made according to the principles of the present invention shall fall within the scope of the present invention.
