Abstract:
A motion frame for pictures comprising a frame with which a grating plate and pictures are tightly compressed together, and a frame stand having thereon a motor of which the level can be adjusted; the frame is assembled on the frame stand, a specific shaped leaf driven by the motor can fast change the inclined angular position of the frame, and an effect that pictures are automatically changed and entirely presented in long durations can be achieved.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the invention  
         [0002]     The present invention is related to an improved motion frame for pictures, and especially to an improved motion frame for pictures with which the pictures can fast move and automatically change, and the pictures can be entirely presented for long durations.  
         [0003]     2. Description of the Prior Art  
         [0004]     Products each with the effect of mutual changing of two or more than two pictures according to the principle of refraction of cylindrical mirror grating are more and more popularized; each product with two changing pictures originally has a grating plate clung on the pictures and moved by a viewer to a different angular viewing position, and then he can see the changing of the two pictures.  
         [0005]     In order to meet the requirement of advertisement to elevate the visual effect and to attract people&#39;s eye sights, there have been various automatically picture changing frames developed. Although the mechanisms of them are more or less different, they all observe a principle, that is, in each case, the grating plate is separated from the pictures, a motor is provided to drive either of the grating plate and the pictures, so that a viewer stay at a position unmoved can see nonstop changing of the two pictures.  
         [0006]     The structure has two defects: one is that the grating plate and the pictures must be kept a very suitable tightness or looseness; if they are too tight, an overly large impedance may exist; while if they are too loose, the changing effect of the pictures will be inferior, the larger the sizes are, the harder they will be controlled. The other is that the motor is rotated with a fixed rotational speed, when an eccentrically rotating round member with an axle as a rotating center drives the pictures to make changing, the durations for entirely presenting the pictures before they get into the processes of alternately changing are short, the important effect for customers to clearly see the contents of the advertisements is unable to get.  
         [0007]      FIGS. 1A  to  1 E are schematic views showing the operations of a conventional motion frame for two pictures, wherein a round pushing leaf  503  being eccentric to a rotating axle  504  of a motor is placed at an opening of a moving article  501 , the moving article  501  can be connected with a grating plate or the pictures for angular changing.  
         [0008]     In the drawings of  FIGS. 1A  to  1 E,  502  indicating a horizontal line at the center of the rotating axle  504  of the motor, in the drawings the states of moving of the moving article  501  by rotating clockwise of the rotating axle  504  of the motor every 90 degrees are shown. We can see that the article  501  is all the way moved gradually following the rotating of the rotating axle  504 ; i.e., the grating plate or the pictures change their angular presenting positions gradually to make the pictures change. By virtue that such a conventional structure takes advantage of the rotating eccentric pushing leaf  503  to render the two different pictures always to keep the processes of slowly alternately changing, so that the durations for entirely presenting the pictures are short, the effect for presenting the entire pictures in predetermined durations can not be achieved.  
       SUMMARY OF THE INVENTION  
       [0009]     In order to get rid of the above two main defects of the conventional structures, the present invention tightly compresses together a grating plate and pictures with a frame, then the frame is placed on a frame stand, the frame thus can be varied between two set inclined angular positions, and an effect that the two pictures are automatically changed and entirely presented in long durations can be achieved.  
         [0010]     The main improvement of the present invention is to provide a leaf with a specific shape and being driven by a motor, the leaf with a specific shape is used to achieve the effect that the two pictures are automatically changed and entirely presented in long durations; and the leaf can be made of plastic or metal etc. The specific shaped leaf includes two or more than two semicircles of different radii or two non circular shapes in order to shorten the durations for changing their angular presenting positions, thus the durations for entirely presenting the pictures are lengthened.  
         [0011]     Another improvement of the present invention is to provide a device on the motor to adjust the level of the motor, thus the initial angular position of the frame can be adjusted to allow the first one of the pictures to be entirely presented.  
         [0012]     The present invention will be apparent after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0013]      FIGS. 1A  to  1 E are schematic views showing the operations of a leaf of a conventional motion frame;  
         [0014]      FIG. 2  is a top view of a stand of a motion frame for pictures of the present invention;  
         [0015]      FIG. 3  is a sectional front view of the stand of the motion frame for pictures of the present invention;  
         [0016]      FIG. 4  is a side view showing the frame stand of the present invention is combined with the motion frame for pictures having thereon a grating plate;  
         [0017]      FIG. 5  is a plan view showing a specific shaped leaf of the motion frame for pictures of the present invention;  
         [0018]      FIGS. 6A  to  6 E are schematic views showing the operations of changing pictures of the leaf of  FIG. 5 ;  
         [0019]      FIG. 7  is a plan view showing another specific shaped leaf of the motion frame for pictures of the present invention;  
         [0020]      FIG. 8  is a plan view showing a further specific shaped leaf of the motion frame for pictures of the present invention, the motion frame can be applied to three pictures;  
         [0021]      FIGS. 9 and 10  are sectional side views of the motion frame for pictures of the present invention showing a device on a motor is used to adjust the level of the motor. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0022]     Referring to  FIGS. 2 and 3 , the present invention has a frame stand composed of a base  101  and a frame bracket device  102 , protruding axles  104  are provided on two mutually opposite sides respectively on the frame bracket device  102 . There is a set of electric power supplying equipment including batteries, a transformer, an electric power socket and a switch etc. (not shown) provided in the base  101 ; excepting these, a motor  201  has a rotating axle  204  protruding upwardly out of the horizontal surface of the base  101 , the rotating axle  204  has on its top end a specific shaped leaf  103 . The main body of the motor  201  is placed on a cylinder  202  of the base  101 , a movable screw  203  in the base  101  is used to control the desired level of the motor  201 ; the movable screw  203  is extended through a fixed plane  205  at the bottom of the cylinder  202  to be locked onto the bottom surface of the motor  201 . By rotation of the screw  203 , the horizontal levels of the motor  201  and the leaf  103  can be adjusted, thus a device for adjusting the level of the motor  201  can thus be formed. Wherein the specific shaped leaf  103  is composed of two or more than two semicircles or non semicircles of different radii, the rotating axle  204  of the motor  201  is extended through the rotating center of the specific shaped leaf  103 , and the specific shaped leaf  103  will be specifically described about its nature.  
         [0023]     The frame stand of the present invention is different from a conventional frame structure in two points, one is that the end of a motor of the conventional frame for changing pictures has an eccentrically rotating round pushing leaf fixed on an axle at a rotating center thereof (referring to  503  in FIG.  1 A), by rotating of the pushing leaf about the eccentrically rotating center to move pictures to and fro; the other one is that the motor of the conventional frame for changing pictures is fixed on a base of the frame, there is no designing for adjustment of moving.  
         [0024]     Further please refer to  FIG. 4 , the frame stand of the present invention is mounted thereon with a frame  301 ; the frame  301  is provided therein with a grating plate and the pictures tightly compressed and combined together, the pictures can be more than two by amount. The frame  301  is pivotally connected on protruding axles  104  provided on the frame bracket device  102  on two lateral sides thereof; the bottom of the frame  301  is kept a distance from the horizontal upper surface of the base  101  of the frame stand, so that the frame  301  can be adjusted angularly about a central line formed by the two protruding axles  104 . By supporting of the frame bracket device  102 , the frame  301  pends downwards and leans in a declined way on an edge of the specific shaped leaf  103 , the specific shaped leaf  103  is rotated by the motor  201  to push the bottom portion of the motor  201  and meantime change the declined angle of the frame  301 .  
         [0025]     The features of the shaped leaf  103  and the designing for adjustment of moving of the motor  201  of the present invention will be specified below:  
         [0026]     Referring to  FIG. 5  which shows an embodiment of specific shaped leaf  103  designed for two pictures, the specific shaped leaf  103  is composed of two semicircles  401 ,  402  of which one has a smaller radius while the other has a larger radius; but the two semicircles  401 ,  402  are concentric, and take a concentric circle  403  as their center for assembling with the rotating axle  204  of the motor  201 . This specific designing can render two different pictures in a grating plate of the frame  301  to change with each other in a shortest time; however the durations for entirely presenting the two different pictures are lengthened. Referring to  FIGS. 6A  to  6 E which are schematic views showing the operations of rotating of the frame  301  by the shaped leaf  103 , as compared with the conventional technique shown in  FIGS. 1A  to  1 E, the specifically shaped leaf  103  of the present invention can push the frame  301  having the grating.  
         [0027]      FIG. 6A  shows the state that the frame  301  having the grating of the present invention leans in a declined way on the specific shaped leaf  103  when the motor  201  has not yet been activated, while the state when the smallest round arc of the leaf  103  contacts the frame indicates the initial position; this angular position of the frame is assumed to be exactly an angular position that the first picture on the grating plate is entirely presented;  FIG. 6B  shows the state that the frame  301  is still unmoved when the motor  201  rotates clockwise, this indicates that the first picture on the grating plate all the way is entirely presented during this stage of time;  FIG. 6C  shows the state that the motor  201  rotates for 22 degrees, we can see the frame  301  having the grating is pushed upwards a small distance “t” by the specific shaped leaf  103  in this short duration, and this distance “t” is exactly the difference between the radii of the two semicircles  401  and  402  (referring to  FIG. 5 ), it is assumed that the angular change exactly allows the second picture on the grating plate is entirely presented;  FIG. 6D  shows the state that the motor  201  rotates again for 180 degrees, the frame  301  having the grating is kept unmoved all the way, this indicates that the second picture on the grating plate all the way is entirely presented;  FIG. 6E  shows the state that the motor  201  rotates again for 22 degrees to get back to the original position, in this short duration, the second picture on the grating plate again is changed for the first picture, and the frame  301  having the grating abuts against the specific shaped leaf  103  to render the latter to move down for a small distance “t”.  
         [0028]     By comparing the  FIGS. 1 and 6 , we can see how the present invention and the conventional technical structure are different in effects they result.  
         [0029]     The difference of radii of the two semicircles  401  and  402  of the specific shaped leaf  103  is related to the angular change of the frame  301  having the grating, the problem of changing angles of the frame  301  to change the first picture for the second picture can thus be solved; to enlarge or reduce the peripheral lengths of the two semicircles  401  and  402  non equivalently proportionally can change the durations of entirely presenting the two pictures on the frame  301  having the grating.  
         [0030]     The specific shaped leaf  103  is not limited to two by amount; the specific shaped leaf  103  is composed of two or more than two semicircles or non semicircles.  
         [0031]     If it is desired to have the two different pictures in the frame  301  having the grating obtained equal durations for entirely presenting, referring to  FIG. 7 , the specific shaped leaf  103  is composed of a semicircle  401 ′ and a non semicircle  402 ′ of which one has a smaller radius while the other has a larger radius; wherein the length of the round arc of the non semicircle  402 ′ is designed to be equal to the length of the round arc of the semicircle  401 ′, in this way, the two different pictures in the frame  301  having the grating can have equal durations for presenting.  
         [0032]     If the frame  301  having the grating has therein three different pictures, if it is desired to make the three different pictures in the frame  301  having the grating have equal durations for entirely presenting, referring to  FIG. 8 , the specific shaped leaf  103  is composed of three non semicircles of different radii, the three non semicircles are sectors  601 ,  602  and  603  which are concentric, but the peripheral lengths of the three sectors  601 ,  602  and  603  are equal, in this way, the three different pictures can have equal durations for entirely presenting.  
         [0033]     Addition to these, a design for adjustment of moving of the position of the motor  201  is: the design is for solving the problem of non equivalency of the refraction angles of different grating plates, referring to  FIG. 9 , a frame  702  having a grating is placed on a frame stand, the bottom of the frame  702  leans in a declined way on an edge of a specific shaped leaf  701 , if a first picture or a second picture is in an angular position to render the two pictures alternate with each other, a movable screw  703  shall be adjusted for raising or lowering the level of the motor  201 ; when the motor  201  is raised by adjustment, the specific shaped leaf  701  will push the frame  702  having the grating rightwards to change the angular position of the grating, such as is shown in  FIG. 10 , the picture presented by the grating now naturally changes, it needs only to adjust to render one of the pictures to be entirely presented, this operation exactly makes the assumed situation shown in  FIG. 6A .  
         [0034]     The specific shaped leaf  103  ( 701 ) mounted on the rotating axle  204  of the motor  201  can be of a fixed type or can be a changeable device.  
         [0035]     Naturally, other linking-up mechanism can be provided between the specific shaped leaf  103  ( 701 ) and the frame  301  ( 702 ) to hide the rotating leaf  103  ( 701 ); alternatively, the grating plate in the frame  301  ( 702 ) can be angularly changed; both these are simple alteration of the present invention.  
         [0036]     In conclusion, novel structure of the motion frame for pictures provided by the present invention surely can get the effect of making the duration of entirely presenting the pictures elongated; the present invention therefore has improvement, what we claim as new and desire to be secured by Letters Patent of the United States is: