Abstract:
A method for attaching a flat screen display device onto a flat surface using a surface mounted holder is disclosed. The holder includes a plurality of springy electrical contacts and a plurality of hooks each having a latch. The rear surface of the display device includes corresponding electrical contacts for corresponding with the plurality of springy electrical contacts and sockets each with a convex area corresponding to the hooks each having a latch. The method includes mounting the sockets onto the hooks and pushing the display device toward the flat surface by overcoming a biasing force of the springy contacts; and sliding the display device in a direction opposite to the direction of the hooks until the springy electrical contacts engage the corresponding electrical contacts and every convex area is latched by every latch, and is secured by thebiasing force for preventing accidental release of the display device.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of Invention  
         [0002]     This invention relates to the mounting and the connection of flat screen displays such as CRT, LCD, PDP (Plasma Display Monitors) and other flat screen display devices and to the mounting and connection of video interphone monitors used in video interphone systems.  
         [0003]     2. Description of the Prior Art  
         [0004]     Flat screen display devices such as television receivers, PC displays and monitors are mounted on walls using brackets and holders for attaching the display devices at a distance such as 5 cm˜10 cm (2″˜4″) away from the wall, allowing for a space for the connection of cables and their connectors, such as power, video and audio connectors, to the device. The mounts, holders, fixtures and the cables behind the display device are visible and are non-pleasing to the interiors of apartments or offices were they are installed.  
         [0005]     Display devices such as surface mounted video interphone monitors are firmly attached to the wall surface using screws or other fasteners. Other recess mounted video interphone monitors are attached to a back box (embedded into a wall) for recess mounting the video interphone monitors into the wall. In all such video interphone monitor units the cables are connected to terminals inside the video interphone device and its cover is secured by screws to the device itself or to the back box. The screws holding the device cover or the device itself to the back box are non-pleasing to the interior decoration and are objected by architects and interior designers. Moreover, to remove for servicing any of the prior art flat screen display devices and/or the video interphone monitors call for disconnection of the wires, cable and plugs and the mechanical disassembly of the device from the mounts, holders, fixtures, the wall and/or the back boxes, which is time consuming and cumbersome.  
       SUMMARY OF THE INVENTION  
       [0006]     It is an object of the present invention to provide a method and apparatus for attaching flat screen display device, such as CRT, LCD, plasma display, LEDs or other flat screen display devices included in apparatuses such as PC display, data display, graphic display, picture display, television receivers, video monitors, video interphone, video conferencing, video telephone, shopping terminals and a combination thereof, onto walls or other flat surfaces and/or into back boxes, buried into walls or other flat surfaces, without visible mounting screws and/or other visible fixing holder, visible fixtures and/or other visible fasteners.  
         [0007]     Another objects of the present invention is to provide the holder with springy contacts for connecting all the electrical and signal lines to the flat screen display device or the video interphone unit through a reciprocal contacts affixed onto the rear surface of the flat screen display device or of the video interphone unit, thereby enabling the removal or the attaching of the display device or the video interphone unit without the need to connect or disconnect individual wires or connectors to and from the display device or the video interphone unit itself. The resile force of the springy contacts also provide the force for latching the display device to latching hooks for preventing accidental release of the display device from its holder.  
         [0008]     Another object of the present invention is to provide an embedded back box for installation into walls or other flat surfaces and for attaching a retractable holder onto a spring guided mount plate, through a set of springs extended from the holder into the spring guided mount plate, thereby providing for tightly attaching the display unit, by a spring action onto the wall surface, without the use of visible screws or other fasteners and/or visible fixtures. 
     
    
     BRIEF DESCRIPTON OF THE DRAWINGS  
       [0009]     The foregoing and other objects and features of the present invention will become apparent from the following description of preferred embodiments of the invention with reference to the accompanying drawings, in which:  
         [0010]      FIGS. 1A and 2A  are perspective views of the mounting of a surface type display device of the preferred embodiment of the invention.  
         [0011]      FIGS. 2A and 2B  are perspective views of the mounting of a recess type display device of the preferred embodiment of the invention.  
         [0012]      FIGS. 3A, 3B  and  3 C are sectional views showing the latching method of the preferred embodiment, using the springy contact assembly and the latching hooks of the present invention.  
         [0013]      FIGS. 4A and 4B  are perspective views of the retractable holder attached to a spring guided mount plate in its pull out and pushed back positions.  
         [0014]      FIGS. 5A, 5B  and  5 C are sectional views of the holder with the spring guided mount plate in pull out and pushed back positions and the side and front views of the springs.  
         [0015]      FIGS. 6A and 6B  are perspective views of the spring and the spring slot of the spring guided mount plate of  FIGS. 5A and 5B .  
         [0016]      FIGS. 7A, 7B  and  7 C are exploded view and perspective views of the holder in its pull out and pushed back positions within the recess mounting box.  
         [0017]      FIGS. 8A, 8B ,  8 C and  8 D are perspective views of the mounting and the removal steps of a surface type display device of the preferred embodiment.  
         [0018]      FIGS. 9A, 9B  and  9 C are perspective views of the mounting steps of a recess type display device of the preferred embodiment.  
         [0019]      FIGS. 10A and 10B  are perspective views of a decorative frame surrounding a recess type display device. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0020]      FIG. 1A  shows a flat screen display  100 S for surface mounting onto a surface mount  2 . A display device in the following description may be flat screen displays such as CRT (cathode ray tube), LCD (liquid crystal display), PDM (plasma display monitor) or LED (light emitting diodes) as used in PC display monitors, or video monitors, or television receivers, or video interphone monitor station, video telephone devices, video conferencing terminals or shopping terminals or other display devices used for displaying data, graphics, pictures and a combination thereof. Surface display device in the following description is a display device  100 S shown in  FIG. 1A  for mounting onto a wall or other flat surfaces such that its entire body protrudes from the surface. Recess display device in the following description is a display device  100 R shown in  FIG. 2A  for mounting onto a wall or other flat surfaces such that the rear portion of the display device is buried into a cutout in the surface or into a rear box  6  embedded into the wall or the flat surface with only the front frame and/or the front portion of the display device is protruding from, or aligned with the surface. A wall in the following description may be a wall, pole, partition, framework, skeletal structure, fence, bulkhead or any other flat surface occupied by the display device  100 S or the recess display device  100 R.  
         [0021]     The holder  2  of  FIG. 1A  including four latching hooks  5  and a springy contact assembly  3  is shown attached to a wall  1  by the screws  2 C through the mounting holes  2 A shown in  FIG. 1B . The two sets of three holes  2 B shown on top and under the springy contact assembly  3 , are for mounting the holder onto an electrical box, which is well known as a single or dual gang box. The electrical box (not shown) contains the electrical and signal wires, which are connected to the respective contacts  3 A of the springy contact assembly  3 . At last two electrical springy contacts are needed to provide for one electrical circuit. When the electrical box is not used an electrical pipe or other type of conduit can carry the wires to the springy contact assembly  3 . As shown in  FIG. 1B  the four sockets  15  of the rear surface  111 R of the display device  100 S or of the display device  100 R of  FIG. 2B  are complementary to the four hooks  5  of the holders  2  or  2 R and as shown in  FIGS. 3A, 3B  and  3 C when the display device  100 S with its sockets  15  are aligned with ( FIG. 3A ) and pushed onto the hooks  5  ( FIG. 5B ) and slide downwards ( FIG. 5C ), the bosses or convexes  15 A inside the sockets  15  will lock the display device into the latches  5 A of the hooks  5 . The bosses or bars  15 A are shown as semi circled convexes but can be formed into shapes such as rectangular or triangle or any other matching shapes corresponding to the latches  5 A of the hooks  5 .  
         [0022]     The expanded springy contacts  3 A of the contacts assembly  3  of  FIG. 3A , are shown compressed  3 AA in  FIG. 3B  and engage a set of complementary contacts  13 A (shown in  FIG. 3C ), assembled or embedded onto the rear surface  111 R of the display device  100 S or  100 R. The compressed contacts  3 AA shown in  FIG. 3C  force the entire display device  100 S or  100 R away from the holder  2 , thereby firmly securing the convexes  15 A of the sockets  15  to the latches  5 A of the hooks  5  for preventing accidental release of the display device  100 S or  100 R from the holder  2 .  
         [0023]     The contacts  13 A of the preferred embodiment are plated surfaces of a copper pattern of a printed circuit board  14  mounted on the inner side of the rear cover  111  of the display devices  100 S and  100 R and are accessed through a cutout  111 C for accommodating the size and thickness of the contacts assembly  3 . However different types of fixed mounted or embedded electrical contacts can be used instead.  
         [0024]     The springy contacts  3 A, the hooks  5  and the sockets  15  are all shown extended vertically, with the hooks directed upwards for attaching the display devices  100 S or  100 R by mounting the sockets  15  onto the hooks  5  and by pushing the display device against the springy contacts  3 A and for locking the display device to the holder  2  by sliding the display device downward such that the convexes  15 A are latched by the latches  5 A of the hooks  5 . However it is obviously possible to extend the springy contacts  3 A, the hooks  5  and the sockets  15 A vertically in the opposite direction (upside down) thereby latching the display devices  100 S or  100 R to the holder by sliding it upwards. It is similarly possible to extend the sockets  15 , the springy contacts assembly  3  and the hooks  5  sideways to the left or the right thereby latching the display devices sideways to the left or right. Such sideways or upward latching provides for engaging the springy contacts  3 A with the complementary contacts  13 A and for securing the display devices  100 S or  100 R to the holders  2  or  2 R, similarly to the process shown in  FIGS. 3A, 3B  and  3 C, but in opposite direction (upwards) or left-right direction (sideway).  
         [0025]     Similarly, it is becoming clear that the springy contacts  3 A provide the electrical and signal interconnection between the holders  2  or  2 R and the display devices  100 S or  100 R and the resile force for securing the convexes  15 A of the display device  100 S or  100 R to the latches  5 A of the hooks  5  of the holders  2  or  2 R.  
         [0026]     Though the shown preferred embodiment of  FIGS. 1A and 1B  include four hooks  5 , four sockets  15  and a single contacts assembly  3 , it is similarly possible to employ two hooks  5 , for example around the vertical center of the holder  2  and extend two contacts assembly  3  one the top and the other on the bottom of the holder  2  (not shown), or it is possible to employ three or six hooks  5  and any number of contact assemblies  3 , to accommodate a variety of display device sizes, shapes, weight and structure, by providing complementary contacts  13 A and sockets  15  on a rear surface of corresponding display devices.  
         [0027]      FIGS. 2A and 2B  show a recess display device  100 R, which is similar to the surface display device  100 S of  FIGS. 1A and 1B  with the exception of the rim or frame  113  surrounding the front cover  112  of the display device  100 R. The rim  113 , as will be explained later, should be tightly forced onto the wall  1  and cover the mounting box and its surrounding edges. Otherwise, the retractable holder  2 R shown in  FIGS. 2A and 2B  is similar to the holder  2  of the  FIGS. 1A and 1B  with the exception of the semi circled hooks  2 H for attaching the retractable holder  2 R to the spring guide plate  20  shown in  FIG. 4A  through four springs  21 , instead of the holder  2  that is attached to a wall  1  using the screws  2 C through the holes  2 A. The mounting steps of the recess display device  100 R onto the retractable holder  2 R are same as the mounting steps of the surfaced display device  100 S onto the holder  2 .  
         [0028]     Shown in  FIG. 4A  is the retractable holder  2 R supported by four extended springs  21  that are attached to the retractable holder  2 R by four semi circled hooks  2 H at the rear surface  2 RR of the retractable holder  2 R. The springs  21  comprising coil portion  21 C and two expanded arms  21 A, each terminated with a stopper  21 S. The semi circled hooks  2 H for attaching the coil  21 C of the spring  21  provide free rotation to the spring  21  around the axis  2 HA of the semi circle as shown in  FIG. 6A . The two arms  21 A of each of the four springs  21  are supported by four slots  23  of the spring guide plate  20  shown in  FIGS. 4A, 4B ,  5 A,  5 B,  6 A and  6 B. The spring guide plate  20  is attached to the recess mounting box  6  of  FIG. 7A  using four screws  25  to become the fixed supporting fixture for the retractable holder  2 R, which can be pulled out or pushed back into the mounting box  6  through the four extended springs  21  shown in  FIGS. 7B and 7C . The cutouts  23 A in the spring guide plate  20  shown in  FIG. 7A  are provided for simplifying the assembly of the springs  21  into the slots  23 .  
         [0029]     The recess mounting box  6  of  FIG. 2A  is shown embedded into the wall  1  with its rim  12  aligned with the wall surface. In practice however embedded or buried mounting boxes are not perfectly aligned with the walls, nor are they perfectly leveled. The exploded view of the box  6  and the spring guide plate  20  shown in  FIG. 7A  illustrates how the level of the spring guide plate  20  can be adjusted through the angled oval shaped screw holes  22 , which provide for correction of the holder levelness of up to several degrees, such as ±3° by adjusting the spring guide plate  20  inside (a non leveled) embedded box  6 , using the locking screws  25 , also shown in  FIGS. 6A and 6B , to lock the spring guide plate into its adjusted position. While the mounting box  6  should not be installed protruding out from the wall surface  1 , the box  6  is commonly installed buried inside the wall, with its rim  12  imperfectly aligned with the wall surface  1 . To compensate for the non evenness of the box  6  with the wall surface  1 , the four springs  21  extended between the retractable holder  2 R and the spring guide plate  20  provide the needed flexible attachment method of the display device  100 R to the wall surface  1 , without the use of any visible screws, fasteners or fixtures.  
         [0030]     The coil  21 C of the spring  21  of  FIG. 5C , shown fully recoiled, is supported by the semi circle hook  2 H at the back  2 RR of the retractable holder  2 R and as explained above the semi circle hook  2 H provides free movement to the spring  21  around the axis  2 HA of the semi circle plane. By such movement the spring  21  can be drawn out from the slot  23  to almost perpendicular position versus the holder  2 R, as shown in  FIG. 5A  and  FIG. 6A , or can be pushed back into almost parallel position with the retractable holder  2 R as shown in  FIG. 5B  and  FIG. 6B . The spring  21  of the preferred embodiment is shown made of round wire spring with a coil  21 C portion, but it can be made of flat or round wire spring without a coil, and it can be supported by a different hook (not shown) instead of the semi circled hook  24 , or for example it can be attached to the retractable holder  2 R by a hinge (not shown) or other rotating joints for providing free rotation to the spring in its retracting movement.  
         [0031]     Because the spring  21  is pulled and pushed back through a narrow vertical slot  23  it is preferred to shape the front view of the spring into a curve  28  as shown in the front view  21 F of  FIG. 5C  and the perspective view shown in  FIG. 6A , allowing for a smooth movement of the spring  21  through the slot  23 . The curve  28  also enables the spring  21  to smoothly slip or slide back into the space between the spring guide plate  20  and the recess mounting box  6  and as will be explained later, the curved arms  21 A increase the holding force of the retractable holder  2 R in its pushed back position.  
         [0032]     During the retractable holder  2 R pull out movement it pulls with it the spring  21  by compressing the coil  21 C as shown in  FIG. 5A  and  FIG. 6A  all the way until the stopper  21 S engages the slot  23  for preventing accidental removal of the springs  21  from the spring guide plate  20 .  
         [0033]     When the retractable holder  2 R is fully pulled out the arms  21 A of the four springs  21  are bend backward and are forced tightly by the spring recoiling force against the outer  26  edges of the slot  23  as shown in  FIG. 4A  and  FIG. 7B . Pushing back or thrusting the retractable holder  2 R toward the spring guide plate  20  thrusts and slip the arms  21 A inwards  29  through the slots  23  and releases the combined recoiling forces of all the four springs  21  by engaging the released arms  21 A forced against the inner  29  edges of the slots  23 , and creating an escalating force that snaps the retractable holder  2 R inwards into the mounting box  6  until the rim or frame  113  of the display device  100 R is intercepted by the wall  1  shown in  FIG. 9C  or until the retractable holder  2 R is stopped by the spring guide plate  20  shown in  FIGS. 4B, 5B ,  6 B and  7 C. Once the springs  21  are slide back into the space between the spring guide plate  20  and the rear of the box  6 , the curved arms  21 A that are pressured against the rear of the box  6  provide added clutching power to the retractable holder  2 R in its push back position, as shown in  FIG. 5B .  
         [0034]     The recoiling power can be calculated to provide sufficient clutching force, to accommodate the display device  100 R size, weight and shape. This can be achieved by using different spring wire diameter, or by selecting the spring material hardness and elasticity. Further the retractable holder  2 R is shown as having four springs  21 , but it can be attached using only two springs, one on the left and one on the right side of the display device  21 .  
         [0035]     Alternatively, two springs  21  can attach the retractable holder  2 R one on the top and one at the bottom of the retractable holder  2 R through a corresponding slots  23  one on the top and one on the bottom of a spring guide plate (not shown). It is similarly possible to provide, for example, in addition to the four springs  21  shown in  FIG. 4A , four more springs  21 , two on the top and two at the bottom of the retractable holder  2 R. This of course by providing additional appropriate slots  23  on the top and the bottom of a spring guide plate (not shown). Therefore, it is also possible for example, in addition to calculating the spring  21  recoiling power and force to increase the number of the springs, each with lower recoiling power or use lesser number but more powerful springs whenever higher holding force is necessary. Or reduce both the number of and the recoiling power of the springs whenever lower holding force is needed.  
         [0036]     Another important compression force and power calculation is the consideration for attaching and releasing the display device  100 R from the retractable holder  2 R. As explained above the first push back of the display device  100 R toward the mounting box  6  for attaching (or releasing) the display device onto (or from) the retractable holder  2 R is to overcome the resile pressure of the springy contact assembly  3  for releasing the convexes  15 A from the latching hooks  5 . Accordingly, the force to overcome the pressure of the springy contact assembly  3  should be less than the force required to slip back the springs  21  through the slots  23  or the force needed to overcome the clutching of the springs  21  onto the outer surface  26  of the slots  23  edges, holding the holder  2 R in its pulled out position shown in  FIG. 4A  and  FIG. 7B . The difference in the forces enables the push back of the display device  100 R onto the retractable holder  2 R for attachment (or release) while the retractable holder  2 R is in pulled out position. However, it may also be possible to provide a stopper (not shown) for holding the retractable holder  2 R in its pulled out position while attaching or removing the display device  100 R.  
         [0037]     Shown in  FIGS. 8A and 8B  are the two steps to attach a surface display device  100 S onto the holder  2 , mounted onto a wall  1 . The first step shown in  FIG. 8A  is to align the sockets  15  of the display device  100 S shown in  FIG. 1B  and step two is to mount the display device  100 S and push it onto the holder  2  and slide it downwards as shown in  FIG. 8B . By this the display device  100 S is latched into place by its convexes  15 A and the latches  5 A of the hooks  5  and its electrical and signal inter connections are engaged through the springy contacts  3 A and the complementary contacts  13 A.  
         [0038]     The steps to remove the display device  100 S from its holder  2  are as simple, with the first step shown in  FIG. 8C  is to push back the display  100 S toward the wall for releasing the convexes  15 A from the latches  5 A and sliding the display device upwards.  
         [0039]     The releasing step of the display device is another very important item of the invention. Over simplicity of a releasing step may result in accidental release and eventual damage to the display device.  
         [0040]     For this reason, the plurality of the latches  5 A of the hooks  5  and the complementary convexes  15 A of the sockets  15 , offer the safety needed against accidental release, whereby all the convexes  15 A must be released from all the latches  5 A simultaneously, otherwise the upward lifting of the device will be prevented by any one of the latches  5 A. Therefore as shown in  FIG. 8C  the entire display device  100 S must be pushed toward the wall  1  in order to release all the convexes  15 A from all the four latches  5 A and only then can the display be removed from the hooks  5  and pulled out as shown in  FIG. 8D , thereby ensuring no accidental release will take place.  
         [0041]     Shown in  FIG. 9A  is the first, aligning step, for attaching a recess display device  100 R onto the retractable holder  2 R, having its four sockets  15  aligned with the hooks  5  of the retractable holder  2 R that is clutched in its pull out position, pulled all the way out from the spring guide holder  20  which is attached to the recess mounting box  6  by the screws  25 . The retractable holder  2 R is clutched in its fully pull out position by the four springs  21  as explained above.  
         [0042]     Similar to the attaching of the display device  100 S detailed above, the next step to attach the display device  100 R is to push the display device  100 R onto the retractable holder  2 R and slide it downward for locking the convexes  15 A of the sockets  15  to the latches  5 A of the hooks  5 , as shown in  FIG. 9B .  
         [0043]     The final step shown in  FIG. 9C  is the pushing back of the display device  100 R onto the wall  1  and into the box  6 , and as explained above until the rim or frame  113  is engaged by the wall  1  and the springs  21  are tightly forcing the rim  113  of the display device  100 R against the wall  1 .  
         [0044]     To release and remove the display device  100 R from the retractable holder  2 R calls first for the pulling out of the display device (attached to the retractable holder  2 R) from the mounting box  6  (not shown) and then repeating the steps of pushing the display device toward the retractable holder  2 R and sliding it upwards similar to the display device  100 S shown in  FIGS. 8C and 8D .  
         [0045]     The rim or frame  113 , shown touching the wall  1  directly, covers the rim  12  of the box  6 . Commonly the immediate surfaces surrounding a recessed mounting boxes, such as box  6 , are not perfectly finished and therefore it is preferable to provide wide rim or frame  113  to cover all such imperfectly finished surfaces in the vicinity of the rim  12  of the box  6 . Alternatively it is possible to provide a separate decorative frame  213  for fixedly attaching it by screws  6 D into the threaded screw holes  6 C of the rim  6 B of the box  6 A shown in  FIG. 10A . With such arrangement it is possible to provide a selection of a decorative fit frames, for covering the surfaces immediately surrounding the box  6  (not shown) by attaching such frames onto the wall  1 , or surrounding the box  6 A, such as the frame  213  shown in the exploded view of  FIG. 10A .  
         [0046]     The frame  213  includes notched surface  213 B and holes  213 C for attaching the frame  213  to the box  6 A or to the wall. The notched surface  213 B fits the rim  213 A of the display device  200 R shown in  FIG. 10A  and therefore the screws  6 D or other fasteners that are used are fully covered and cannot be seen when the display device is attached as shown in  FIG. 10B . By such arrangement it is possible to offer many frame designs with different esthetics and with different methods for attachment to the boxes or the wall such as hooks, studs, clamps or using such materials as bond or bonding tapes and different facilities for matching the frame with the display devices, thereby accommodating the design needs of architects and interior decorators.  
         [0047]     It will of course, be understood by those skilled in the art that the particular embodiment of the invention here presented is by way of illustration only, and is meant to be in no way restrictive, therefore, numerous changes and modifications may be made, and the full used of equivalents resorted to, without departing from the spirit or scope of the inventions as outlined in the appended claims.