Patent Publication Number: US-4839837-A

Title: Three layered laptop computer

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of my co-pending application Ser. No. 870,854 filed June 4, 1986 and entitled Three Layer Portable Computer. 
    
    
     FIELD OF THE INVENTION 
     This invention relates to laptop portable computers and, more particularly, to a computer system that combines all of the essential components such as a keyboard, CPU, display and output, along with necessary connections, into a unitary three layered laptop computer. Most usually, the output component will comprise a printer. 
     BACKGROUND TO THE INVENTION 
     The present invention makes a distinction between laptop computers having only a keyboard and screen member and a fully functioning system having means for output of data into a hard copy format. Separate, small, lightweight printers have been developed for use with laptop computers but require provision of their own supporting surface and attachment of at least a data cable to the CPU. 
     Further, this invention relates to devices for compactly folding the respective joined component members of the device into a unit that protects fragile elements, such as the terminal display and provides the user with a substantially cubic configuration of the closed device to aid in ease of transport and storage. 
     This apparatus further relates to laptop computers that, as the keyboard, display and output components are unfolded when the device is m ade ready for use, the apparatus presents itself in a coplanar arrangement that is very convenient for the user. The display screen will be disposed substantially vertically and will be adjustable for the best line sight or inclination relative the user. The keyboard will be disposed horizontally on the lap in front of the screen, while the output unit, such as a printer will be coplanar with the keyboard and disposed behind the vertical display component. 
     SUMMARY OF THE PRIOR ART 
     The following cited references are exemplary of the U.S. prior art. They are: 
     
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U.S. Pat. No.       Inventor                                              
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3,047,350           Eckstein et al                                        
4,294,496           Murez                                                 
D-250,588           Mayer et al                                           
D-280,511           Moggridge et al                                       
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     U.S. Pat. No. 3,047,350, issued to Eckstein et al, discloses an audiometer case which is portable and may quickly be opened to an appropriate position, for convenient use on a bench or similar surface. 
     U.S. Pat. No. 4,294,496, to Murez, teaches the construction of a portable computer enclosure which has hinged members, thereby enabling the computer to be easily transported. 
     None of the above references, taken singularly or in combination, disclose the specific features of the present invention in any way as to bear upon the claims as appended hereto. 
     SUMMARY OF THE INVENTION 
     A primary object of the invention is to provide an improved laptop computer utilizing a cooperative relationship between a joined keyboard, display, and output member to enable a user to fully utilize the device as a computer system. 
     Another object of the invention is to provide means for compactly and conveniently folding a three layered portable computer unit so as to insure the safety of fragile components, such the the display member, and further to provide a device that is easily transported and stored. 
     Still another object of the present invention is to provide an improved assembly of three interconnected computer components which when opened provide a display member presenting a more convenient line of sight inclination to the user with a glare shield around the screen of the display member and whereby the glare shield provides impact protection to the fragile screen member as the assembly is closed and made ready for transportation. 
     Another object is to provide a coplanar relationship between a keyboard member and a connected output member so as to allow the opened assembly to repose flat on any suitable supporting surface with the supported keyboard and output member in turn providing a suitable mounting for an intermediate display screen member. 
     A further object provides for utilizing peripheral devices both off-line, as in the incorporation of read/write drive elements and on-line devices, such as communication means, to provide a fully functioning system capacity in a laptop computer. 
    
    
     DESCRIPTION OF THE DRAWING 
     FIG. 1 is a top plan view of an opened device according to the invention, illustrating the major components comprising a keyboard member, output member and a vertically disposed display member; 
     FIG. 2 is a side elevation of the apparatus of FIG. 1, showing the coplanar relationship of the keyboard and output member and the inclination of the center-mounted display member which is vertically oriented as the device is opened and made ready for use; 
     FIG. 3 is a top perspective view of the apparatus of FIG. 2; and 
     FIG. 4 is a side elevation of the apparatus as it appears when folded with the display member sandwiched between the keyboard and output member. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to the drawings, in which like numerals refer to like elements throughout, the laptop or portable computer assembly 10 includes a keyboard layer or member 12, a display layer or member 14 and an output layer or member 16, preferably a printer. An intermediate mount element 18 spans the full common width of the three aforementioned members or components and is respectively pivotally attached to the keyboard 12 and output component 16 by hinges 20,21. These hinges will be seen to be carried by the mount 18 at the juncture of its bottom wall 19 and the parallel front and rear walls 20&#39;,22. In this manner, when the assembly 10 is opened as in FIG. 2, the flat bottom 11 of the keyboard unit 12 and flat bottom 15 of the output unit 16 will be substantially co-planar and maintain the mount front and rear walls 20&#39;,22 in vertical planes. Alternatively, the mount element 18 may be omitted with the hinges 20,21 directly joining the three layers 12,14 and 16 together. 
     The display component 14, like the other two principal components, is a unitary member and includes a flat screen unit 24 surrounded by a border 26, three sides of which are in turn bounded by a top frame 28 and two side frames 30--30. The end portions of the bottom of the display component border is notched as at 32--32 to provide therebetween an intermediate, depending tongue 34 adapted to closely fit within a central cut-out 36 formed in the mount element 18. Suitable pivot means (not shown) maintains the display unit affixed to the mount element and allows limited angular adjustment of the plane of the screen 24, according to the user&#39;s needs. Such adjustment is permitted in view of the slight clearance 38 provided between the bottom edge 40 of the border sides 29 and the top wall 42 of the mount element 18, both of which surfaces will be seen to be inclined downwardly toward the rear of the assembly. 
     The top of the monitor border 26 is recessed within the adjacent top frame 28 while the border sides 29--29 are also recessed with respect to the side frames 30--30 such that a recess 31 is provided and within which the plane of the screen 24 will be seen to be angularly disposed. With this arrangement, the frame serves as a shield to provide protection against a certain amount of glare affecting the image presented upon the screen. 
     The keyboard component 12 comprises a fixed unit having planar peripheral walls including a front wall 44 joined to two side walls 46 in turn connected to a rear wall 48 and wherein the front wall will be seen from FIG. 4 to be shorter than the rear wall 48. The opened top of this unit includes the key area 50 containing the usual necessary keys 52 disposed substantially in the plane of the downwardly inclined front top surface 54. As will be seen most clearly in FIGS. 2 and 3, a rear top surface 56 behind the front top surface 54 is disposed in a horizontal plane, co-planar with the keyboard component bottom wall 11. The significance of the configuration of the various elements of the keyboard and display components will become apparent hereinafter as the use of the assembly is described. 
     The remaining, third, output component 16 preferably comprises a printer, either a thermal or ribbon impact type having the necessary platen 58 and printhead 60. The platen may be manually manipulated to insert or remove paper, as by a recessed wheel 62 axially aligned with and suitably connected thereto as shown in FIGS. 1 and 3. Appropriate control buttons 64 on the top wall 66 allow regulation of the printer operation while receptacles 68, also in the top wall 66, may be supplied to provide modem means such as an acoustic coupler so as to utilize the computer in tele-communications. 
     As will be seen in FIGS. 2 and 4, the output component top wall 66 is co-planar with the bottom wall 15 such that the printer defines a regular cubic configuration, unlike that of the two cooperating components. With this construction, the assembly 10 is readily transformed from the use position of FIGS. 1-3 to the storage or transport position of FIG. 4, by folding both the keyboard unit 12 and output unit 16 approximately 90 degrees relative the intermediate mount element 18 and screen 24, to the closed position of FIG. 4. In this latter condition, it will be observed that the display component 14 is sandwiched between the other two components and the resultant assembly defines a regular cubic mass with flush surfaces about its periphery and wherein all opposite walls or surfaces are parallel. 
     It will be apparent that with the above described configuration, the combined height of the keyboard unit front wall 44 and display unit top frame 28 will equal the combined height of the mount element bottom wall 19 and keyboard unit rear wall 48. The construction of the display unit with the angled disposition of the planar screen 24 permits the above closure of the components without contact between the keys 52 and screen as the screen will be juxtaposed the planar, horizontal rear top surface 56 and extend in a spaced apart manner over the keys 52, in view of the sloping, front top surface 54 and the display recess 31. 
     Quite obviously the interior of the keyboard unit 12 is the most likely location for the CPU and other required hardware needed to support operation of the computer 10. This will include any desired number of disk drives 70 and which may be provided with a displaceable protective cover (not shown). Electrical communication between the three components may be by means of suitable well known flexible cables protected beneath pivotable or slidable shroud members 72 at the juncture of the mount element 18 and two adjacent components. 
     Pairs of suitable cooperating latch members 74,76 respectively attached to the keyboard front wall 44 and output unit 16 provide positive securing of the assembly in the closed position while an intermediate handle 78 on the medial portion of the display unit top frame 28 allows convenient carrying of the collapsed assembly by one hand of the user. Alternative carrying means in the form of a strap 80 affixed to the two side frames 30--30 of the intermediate layer enables one to carry the assembly from their shoulder. 
     It will be apparent that the objects and advantages of the invention have been met. Further, as many small changes will occur to those skilled in the art, and as it is not desired to limit the invention to the exact construction as disclosed herein, the foregoing should be considered by way of example, illustrating the principles of the invention, with all equivalents thereof falling within the scope of the invention.