Abstract:
A display apparatus for a display has first member with four sides. The display apparatus includes a transparent restraining member mounted centrally within the four sides of the first member. A second member having four sides and a back is rotatably interconnected with the first member such that the first member can articulate between a first position and a second position. The display apparatus includes holding devices for holding the display as the first member moves from the first to the second position and back to the first position. At least one biasing device exerts an urging pressure for urging the display against the transparent restraining member when the first member is in the first position. The biasing device is preferably a compressible material with memory. The material lies adjacent to the display, distributing the urging pressure along a continuous portion of the display, substantially from one edge to an opposing edge, while the first member is in the closed position. The display apparatus also includes at least one retainer for retaining the biasing device within the second member. The retainer forms a wall of a storage construct within the second member.

Description:
FIELD OF THE INVENTION 
     This invention pertains to display apparatus, and more particularly to a picture frame with quick change display capabilities. 
     BACKGROUND OF THE INVENTION 
     Conventional picture frames are constructed with a backing sheet to hold the picture display flat against the transparent pane of glass. In order to change the display, the backing sheet needs to be removed before a new display can be inserted. Very often this necessitates the removal of the frame from its mount. Other picture frames may provide a rigid backing plate which presses the picture against the transparent glass. The backing plates are held to the walls of the frame by a press fit. These display frames, as well, require some disassembly of the picture frame components in order to remove the current display picture to replace it with a newer picture. Still other picture frames utilize leaf springs to hold the picture against the glass. In order to prevent damage to the display picture, these frames as well require a backing sheet to prevent the leaf spring from wearing the display picture at its pressure points. 
     In view of the shortcomings of existing picture frames, there is a need for improvements which allow the removal of display pictures from a frame without the additional disassembly or removal of a backing sheet or plate. 
     SUMMARY OF THE INVENTION 
     The present invention discloses a display apparatus for a display having a first member with four sides. The display apparatus includes a transparent restraining member mounted centrally within the four sides of the first member. The display apparatus includes a second member having four sides and a back, wherein the first and second member are rotatably interconnected, such that the first member articulates between a first position and a second position. The display apparatus includes holding devices for holding the display as the first member moves from the first to the second position and back to the first position. The display apparatus includes at least one biasing device which exerts an urging pressure for urging the display against the transparent restraining member when the first member is in the first position. The biasing device is preferably a compressible material with memory. The material lies adjacent to the display, distributing the urging pressure along a continuous portion of the display while the first member is in the closed position. The display apparatus also includes at least one retainer for retaining the biasing device within the second member. 
     In the preferred embodiment of a display apparatus constructed in accordance with the present invention, the urging pressure is evenly applied along a portion of the display from substantially one edge to the other edge. The retainer forms a portion of a storage construct. There is also a second biasing device, and a second retainer, the retainer forming a portion of a storage construct. The holding device of the preferred embodiment includes a first and a second spring loaded gripper for holding the display in the first member without the use of a backing sheet while the first member moves from a first closed position to a second open position. The preferred embodiment further uses a foam rubber-like material with a nondamaging contact surface as a first and second biasing device. 
     By the use of a display apparatus constructed in accordance with the present invention, changing pictures is accomplished without disassembly of the picture frame components and without the need to remove the frame from its mount. In addition, the display apparatus of the present invention urges a picture against the glass pane without causing damage to the display. One further advantage of the display apparatus constructed in accordance with the present invention inheres in its ability to form storage constructs. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: 
     FIG. 1 is a perspective view of a display apparatus constructed in accordance with the present invention in the first closed position; 
     FIG. 2 is a perspective view of the display apparatus of FIG. 1 in the second open position; and 
     FIG. 3 is a cross-sectional view of the display apparatus of FIG. 1 in a horizontal plane; and 
     FIG. 4 is another cross-sectional view of the display apparatus of FIG. 1 in a vertical plane. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     FIG. 1 shows a preferred embodiment of a display apparatus constructed in accordance with the present invention in a first or closed position. The display apparatus may serve equally well to display pictures or planar art work or any of a number of graphic displays produced in a planar medium. The display apparatus includes a first member  100  having four sides. For illustration purposes only, the first member may be described as having a top side  102 , a bottom side  104 , opposite the top side  102 , a right side  106  connecting the right end of the top side  102  to the right end of the bottom side  104 , and a left side  108 , opposite the right side  106 , and likewise connecting the left end of the top side  102  to the left end of the bottom side  104 . The first member may be constructed from a plurality of members. For instance, in the preferred embodiment each side may be constructed from individual side pieces having beveled cuts at respective opposite ends to join with adjacent pieces. Thus, top side  102  is constructed from a single piece having beveled ends  110 ,  112 . Right side  106  is constructed from a single piece having beveled ends  114 ,  116 , where beveled end  110  of top side piece  102  is joined with beveled end  114  of right side piece. Bottom side  104  is constructed from a single piece having beveled ends  118 ,  120 , where beveled end  112  of bottom side piece  104  is joined with beveled end  116  of right side piece  106 . Left side  108  is constructed from a single piece having beveled ends  122 ,  124 , where beveled end  122  of left side piece  108  is joined to beveled end  120  of bottom side piece  104 , and beveled end  124  of left side piece  108  is joined with beveled end  112  of top side piece  102 . Alternatively, first member  100  may also be constructed from a singular piece of material (not shown), as would be the case in a unitary plastic article. Alternatively, first member may have four orthogonal shaped pieces (not shown) for sides and four corner pieces (not shown) joining each of the respective side pieces to one another. Construction materials for first member  100  may be wood, plastic, metal, or like materials, or any combination thereof. 
     The display apparatus also includes a transparent restraining member  126 . The transparent restraining member  126  may be constructed from glass or like material. Equally suitable to use as the transparent member  216  in a display apparatus constructed in accordance with the present invention is any of the transparent polymeric materials, which are sold under the trade names such as Lucite™, Acrylic™, Lexan™, Plexiglas™, or like materials. 
     First member  100  has a backside plane  130 , which is visible when first member is moved to a second or open position as shown in FIG.  2 . First member  100  defines in a center region a portion void of material such that display  134  may show therethrough. When viewed from the front side as shown in FIG. 1, first member appears as bordering the display  134 . The central region is bordered by the sides of the first member  100  forming a perimeter around the central region. The inside perimeter of the center region is provided with a rabbet or ledge to suitably accommodate the transparent restraining member  126 . When transparent restraining member  126  is placed within first member rabbet, transparent restraining member is substantially flush or even partly submerged within first member backside. 
     Still referring to FIG. 2, first member  100  may be provided with a plurality of holding devices  132  such as spring loaded grippers having serrated teeth to hold the display  134  against the transparent restraining member  126 . Display  134  may also fit within the rabbet provided on the inner perimeter of the sides of the first member  100  so as to be substantially flush or submerged, or even slightly protruding with first member backside plane  130 . Holding devices  132  may be disposed on inside top  102  and bottom  104  sides of first member  100 . However, holding devices  132  may be placed with equal success on any and all sides of the first member backside plane  130 . In addition to spring loaded grippers, holding devices  132  may be tangs (not shown) suitable to rotate about a pivot which causes a portion of the tangs to project into the center region when aligned vertically and do not project when the tangs are aligned horizontally. The projecting portion of the tangs holds the display in the first member  100 . If tangs were located on left  108  or right sides  106  of first member backside plane  130 , projection of tangs in center region would accordingly be affected to correspond with the tangs placement on the first member  100 . Holding devices  132  hold the display  134  within first member  100  without the need for a backing sheet or backing plate. Thus, the display apparatus constructed in accordance with the present invention provides a method of removing displays from the apparatus without disassembly of the apparatus, an advantage not found in conventional picture frames. 
     In the preferred embodiment of FIG. 2, the display apparatus includes a second member  128  that is connected with the first member  100  through the use of hinging devices  136  which allow articulation and rotation of first member  100  relative to the second member  128  between a first closed position and a second open position. First member  100  is held in the second closed position with the use of a clasp. A clasp may take the form of a hook and pin or a hook and eye combination. Shown in FIG. 2 is a hook  157  and pin  159  combination. Other alternatives to the clasp may include magnets on one member and a magnetizable plate on the other member. In keeping with like materials of construction, second member  128  may be constructed from wood, plastics, metals, or any combination thereof. Second member  128  includes four sides and a back side. The four sides and back are preferably five individual orthogonal shaped pieces in varying three dimensions imparting length, width and thickness to each individual piece. However, as with the sides of the first member  100 , the sides of the second member  128 , may be constructed from one unitary piece or any number of a collection of pieces. Second member  128  is constructed with side pieces such that the front surface perimeter of the second member  128  has a constant width dimension. Adjacent pieces may be joined with dove tailed joints as is common in woodworking, although alternative materials may be joined by methods which are also well-known joining methods for the particular material of construction. For illustration purposes, the second member  128  may be said to have a top side  138 , a bottom side  140  opposite the top side  138 , a right side  142 , substantially perpendicular to and connecting with one end of the top side  138  and the bottom side  140 , and a left side  144 , opposite the right side  142 , and substantially perpendicular to and connecting with one end of the top side  138  and the bottom side  140 . First and second members provide an overall appearance of the display apparatus having a box-like shape when in the closed position. The second member right side piece  142  and the left side piece  144  are longer in length than the top side piece  138  or bottom side piece  140 . However, alternate embodiments may be constructed such that the distance from the right to the left side is longer than the distance from the top to the bottom side. In one embodiment, the distances may be substantially equal to each other so that the display apparatus resembles a square. 
     The orthogonal shape of the second member side pieces provide second member  128  with a depth dimension, thus creating volume within second member  128  when first member  100  is in the closed first position. Second member  128  has a backside  146 , which substantially provides the second member  128  with a backside wall such that second member  128  has the appearance of a container when taken in combination with the second member side pieces. First member  100  may also be said to act as a lid or cover for the “container” created by second member  128 . 
     Still referring to FIG. 2, the preferred embodiment of the display apparatus constructed in accordance with the present invention includes two biasing devices  148 ,  150  which exert an urging pressure against the display  134  for urging the display  134  against the transparent restraining member  126  when the first member  100  is in the closed, first position. The biasing devices  148 ,  150  are preferably constructed from a compressible material, such as foam rubber and like materials. The biasing devices  148 ,  150  exert the urging pressure by compressing when the display  134  is pushed against it. Therefore, in order to retain its function as a biasing device for a repeated number of cycles, the biasing devices  148  and  150  preferably have memory to decompress to their original shape once the display  134  is lifted from its contact surface. Biasing device material is chosen so as to provide a nondamaging contact surface such that as biasing devices  148 ,  150  are being urged against display  134 , any rubbing effect has a negligible impact on the display  134 . Biasing devices  148 ,  150  may, therefore, be urged against display  134  for a repeated number of times without the display  134  suffering any appreciable wear. This is the difference between the present invention and other display apparatus using metal springs which require an additional backing sheet to protect the display. Alternates of a biasing device may have more or less surface area. For example, an alternate of the biasing device may be a block that substantially presses against all of the display  134  area. Other alternates may have or more or less individual biasing devices in a vertical orientation on or any combination thereof. 
     In a preferred embodiment, biasing devices  148 ,  150  are orthogonal shaped, having a length substantially the distance between the right side  142  and the left side  144  of the second member  128 , such that the biasing devices  148 ,  150  can fit lengthwise within the second member  128  right and left sides  142 ,  144 . The lengthwise dimension of the biasing devices  148 ,  150  is substantially aligned parallel to the top side  138  or bottom side  140  of the second member  128 . Biasing devices  148 ,  150  also have a height dimension, which dimension is aligned substantially parallel to the right side  142  or the left side  144  of the second member  128 . Length and height dimensions of biasing devices  148 ,  150  form a surface area, the surface area being substantially parallel to the planar display  134  when in the closed, first position. In this manner, biasing device applies its urging pressure over a distributed area of the display  134 . The force per unit area being minimized to reduce the stress on the display  134  at the contact surfaces between the biasing devices  148 ,  150  and the display  134  and the contact surfaces between the transparent restraining member  126  and the display  134 . 
     Referring to FIG. 3, a preferred embodiment of the biasing devices are shown while first member  100  and second member  128  are in the first closed position, while the biasing devices  148 ,  150  are applying their urging pressure against the display  134 . Biasing devices  148 ,  150  and the display  134  are adjacent to each other, such that the surface of the biasing devices  148 ,  150  lie in continuous and direct contact with the display  134 , substantially from right side edge  152  of the display  134  to the left side edge  154  of the display  134 . Biasing devices  148 ,  150  are shown in their biased, compressed state and will decompress to their non-biased state when urging pressure is lifted. The choice in material and the distribution of urging forces over a distributed area allow the biasing devices  148 ,  150  and display  136  to be in continuous direct contact, which eliminates the need for a backing sheet (not shown) or a backing plate (not shown), which is required for conventional display apparatus to hold display  134  prone against the transparent restraining member  126 . 
     Other embodiments of the biasing devices may have circular or oval surface areas. Still, other shapes may have the length and width dimensions adjusted to provide urging pressure in different locations relative to the display  134 . 
     Referring now to FIG. 2, in the preferred embodiment, the display apparatus includes two biasing devices  148 ,  150 , such that a first biasing device  148  is provided approximately two-thirds the distance from the bottom side  140  to the top side  138  and the second biasing device  150  is provided one-third the distance from the bottom side  140  to the top side  138 . Other alternatives may have first  148  and second biasing device  150  more or less spaced apart from one another. Still, other alternatives may provide biasing devices  148 ,  150  in a crisscross pattern, or lengthwise from top to bottom rather than from left to right, and still others may use any combination of configurations including any round or arcuate shapes. 
     Still referring to FIG. 2, the display apparatus constructed in accordance with the present invention also includes retainers  156 ,  158  to retain or hold the biasing devices  148 ,  150  within the second member  128 . The retainers  156 ,  158  are constructed from individual pieces or they may be constructed from a single piece of material. The retainers  156 ,  158  provide an aperture, such that biasing devices  148 ,  150  may snugly fit within the apertures created by retainers  156 ,  158 . Biasing device material is such that the biasing devices are held in place by a slight interference fit between the biasing devices  148 ,  150  and the retainers  156 ,  158 , such that the biasing devices  148 ,  150  are slightly compressed as shown in FIG.  4 . Now, referring again to FIG. 2, the retainers  156 ,  158  are constructed such that they will either form a ledge  160  or a divider  162  or any combination thereof to provide storage capability to the second member  128  in the form of individual storage constructs. In the preferred embodiment, the retainers  156 ,  158  which retain the biasing devices  148 ,  150  in a right to left configuration are such that retainers  156 ,  158  each form one of the sides of a storage construct. A storage construct is defined by four sides, or walls formed by any part of the retainers, dividers, and sides of the second member  128 . As illustrated in FIG. 2, retainer  158  forms a ledge  160  in this embodiment. In other alternatives where biasing devices  148 ,  150  are aligned top to bottom rather than from right to left, retainers may act as dividers  162  or walls for the storage constructs. The back piece and side pieces of the second member  128  in combination with the retainers  156 ,  158  complete the storage constructs. In the preferred embodiment, six storage constructs are provided within the second member  128 . First  156  and second  158  retainers form top and bottom walls of the storage constructs while divider walls, generally denoted by  162 , are provided to increase the number of storage constructs. Walls  162  may be deleted to provide for three storage constructs, or any number may be added or deleted to arrive at any desired number of storage constructs. 
     Finally, the preferred embodiment of the display apparatus has mounting hardware (not shown) for mounting the display apparatus on a wall. Mounting hardware can be any suitable hardware which is widely available. The preferred embodiment of the display apparatus is mounted so that first member  100  pivots about a vertical axis. However, other alternatives may have hardware to enable mounting so first member  100  pivots about a horizontal axis. In one alternate, the display apparatus can have both types of mounting hardware, such that the display apparatus can be mounted both horizontally and vertically, giving the option of having a first member with vertical or horizontal pivoting capabilities. This would be desirable in the case where an obstruction is encountered while moving the first member in one direction, but is not obstructed if the display apparatus were rotated allowing the first member to open from a different direction. 
     While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.