1. Field of the Invention
The present invention relates to a moving-loop advertisement display device, and more particularly to a device that automatically displays and changes pictures for the purpose of demonstrating advertisement information, news announcements etc.
2. Description of Related Art
With reference to
In addition, since a rolling screen (80) is rotatably surrounding the transmission rod (81) and the driven rod (82), a length of the rolling screen (80) is determined according to a distance between the transmission rod (81) and the driven rod (82). Therefore, the quantity of the advertisements printed on the rolling screen (80) is limited.
Therefore, it is desired to provide a novel advertisement device to obviate the aforementioned drawback.
The main objective of the present invention is to provide an advertisement device that allows using a long rolling screen with more advertisements. Further, the present invention drives a rolling screen with advertisement, posters, news, images etc provided thereon as the advertisement, wherein the picture changing device of the present invention utilizes a sensor to detect labels formed on the rolling screen thus to stop the screen at proper positions to demonstrate the advertising content.
Another objective of the present invention is to provide an advertisement device using a transmission device to prevent the occurrence of wrinkles in the rolling sheet while it is rotating.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The display screen (30) forms a closed loop and simultaneously surrounds the driving roller (10) and the driven roller (20). Preferably, the display screen (30) is fabricated by a curtain or material pervious to light, on which plural advertisement segments represented by pictures, patterns or text are attached or printed. Several labels (31) are formed along one edge of the display screen (30), where these labels (31) may be created by dark ink printed on the display screen (30).
When the activated motor (40) drives the driving roller (10) to rotate, the driving roller (10) transmits the display screen (30) to move upward, at the same time the driven roller (20) is driven by the display screen (30). At the time that any label. (31) passes through the optical sensor (70), the emitted optical signal is unable to emit through the display screen (30) and obstructed by the label (31) thus generating a signal for pausing the motor (40) with a short term. During the pause period, the display screen (30) could demonstrate a complete advertisement segment.
With reference to
The rod assembly is composed of a driving roller (10) and a driven roller (20). A motor (40), as the driving device, connects to one end of the upper rod (10) and is able to be automatically and intermittently actuated at predetermined times.
The tension adjustment device in the present invention can be implemented by either or both of a coil (50) formed on the driven roller (20) and helical ribs (11) formed on the driving roller (10). The coil (50) is twisted around the driven roller (20), where the two ends of the coil (50) tightly abut against two enlarged distal ends (21)(21′) of the driven roller (20). It is noted that the coil (50) is formed to have two segments with opposite twisting directions, i.e. clockwise and counter-clockwise directions.
The helical ribs (11) are raised from and wound around the surface of the driving roller (10) similar to the thread on a screw but with two portions having opposite winding directions, where the opposite winding directions of the helical ribs (11) are corresponding to the opposite twisting directions of the coil (50) around the driven roller (20).
The display screen (30) forms a closed loop and simultaneously surrounds the driving roller (10) and the driven roller (20). Preferably, the display screen (30) is fabricated by a curtain or translucent thin film etc, on which the desired pictures, patterns or text are attached or printed. Along one edge of the display screen (30), several labels are created.
When the activated motor (40) drives the driving roller (10) to rotate, the driving roller (10) transmits the display screen (30) to move upward, at the same time the driven roller (20) is driven by the display screen (30). Meanwhile, two outward tension forces with opposite directions (denoted with arrows A and B) occur because of the opposite twisting direction of the coil (50) and the helical ribs (11). The opposite forces will gently tug the screen outwardly and keep the surface of the display screen (30) smooth and prevent the occurrence of wrinkles. Preferably, the driving roller (10) is formed with the helical ribs (11) thereon as shown in
With reference to
The helical ribs (11), with opposite winding directions, are still formed on the surface of the hollow central tube (11). However, it is noted that a first coil (132) and a second coil (142) respectively wind around the first rod (13) and the second rod (14). Further, the twisting direction of the first coil (132) is the same as that of the left half portion of the helical ribs (11) near the first coil (13). Similarly, the right half portion of the helical ribs (11) and the second coil (142) have the same winding direction.
The driven roller (20) is substantially the same as the driving roller (10) of
With reference to
With reference to
The lateral view for each foregoing embodiment is illustrated and schematically presented in
In conclusion, the present invention utilizes the helical ribs (11) or the coil (50) with opposite winding directions as a spiral transmission means to generate opposite tension forces. The tension forces with opposite directions will keep the surface of the rolling screen (30) in a smooth flat status while the screen is rolling. Such a transmission means may be provided on either of the driving roller (10) or the lower roller (20), or preferably on both.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
This application is a division of application Ser. No. 10/829,360, filed Apr. 22, 2004, the contents of which are incorporated herein by reference.
Number | Date | Country | |
---|---|---|---|
Parent | 10829360 | Apr 2004 | US |
Child | 11447273 | Jun 2006 | US |