Abstract:
A hinge mechanism is described wherein a multi-part device (e.g., dual-display device) can move to a snap-open position. In the snap-open position, the parts lock into place when they approach 180 degrees of rotation relative to one another. The locking force in the open position is sufficient that holding or using the multi-part device does not cause an accidental closing action. An unlocking force is required to unlock the device from the open position. Additionally, the locking force drops off precipitously when the two parts are unlocked and rotating away from the locked position.

Description:
BACKGROUND 
       [0001]    Modern mobile phones and tablets have evolved over recent years to the point where they now possess a broad range of capabilities. They are not only capable of placing and receiving mobile phone calls, multimedia messaging (MMS), and sending and receiving email, but they can also access the Internet, are GPS-enabled, possess considerable processing power and large amounts of memory, and are equipped with high-resolution color liquid crystal displays capable of detecting touch input. As such, today&#39;s mobile phones are general purpose computing and telecommunication devices capable of running a multitude of applications. For example, modern mobile phones can run web browsers, navigation systems, media players and gaming applications. 
         [0002]    Along with these enhanced capabilities has come a demand for larger displays to provide a richer user experience. Mobile phone displays have increased in size to the point where they can now consume almost the entire viewing surface of a phone. To increase the size of displays any further would require an increase in the size of the phones themselves. This is not desirable, as users want their mobile phone to fit comfortably in their hand or in a shirt or pants pocket. 
         [0003]    As a result, dual-display devices are becoming more popular. With a dual-display device, the mobile phone or tablet can include an open, expanded position where both displays are flush so that the user feels like there is a single integrated display. In a closed, condensed position, both displays are face-to-face so as to protect the displays. In a fully-open position, the dual displays can sit back-to-back so the user needs to flip the device to view the opposing display. 
         [0004]    Hinges for such dual-display devices are problematic. Typically, the hinges can protrude from the device as it switches between positions. As devices continually become thinner, hinges need to be adapted to accommodate the thinner displays without further protrusion from the back of the device as it is opened and closed. Additionally, excess slack can make the two displays feel loosely connected. Other problems include that the displays do not open and close smoothly. Still yet another problem is the ability to stop the displays in any position as the displays are opened and closed. Torque or friction hinges are known and offer resistance to a pivoting motion. However, the friction hinges can be bulky and protrude from the device. Still another problem is to ensure the displays remain comfortably in the open, flush state, while the user holds one or both displays. 
         [0005]    Therefore, it is desirable to provide improved hinges for multiple display devices. 
       SUMMARY 
       [0006]    This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. 
         [0007]    A hinge mechanism is disclosed wherein a multi-part device (e.g., dual-display device) can move to a snap-open position. For simplicity, the description herein is for dual-display devices, but the embodiments include or can be extended to multi-part devices wherein only one or more displays are used, but the different parts have a hinged connection allowing the parts to rotate relative to one another. In a snap-open position, the parts lock into place when they approach or are at  180  degrees of rotation relative to one another, which is the so-called open position. The locking force in the open position should be sufficient that holding or using the multi-part device does not cause an accidental closing action. For example, the locking force is sufficient that when holding one of the parts with two hands, the other part remains in the locked position. An unlocking force is required to unlock the device from the open position. Additionally, the locking force drops off precipitously when the two parts are unlocked and rotating away from the locked position. Thus, it is desirable that the device have a high force when the displays are within a predetermined angular range relative to one another (e.g.,  175  degrees to  180  degrees), with increasing force the closer the angular rotation is to the locking position of  180  degrees. However, once the device is unlocked and outside of the predetermined angular range, the locking force drops off precipitously and the force required to rotate the parts relative to one another (hereinafter called the rotational force) is substantially constant. 
         [0008]    In one embodiment, a two-part device, such as a dual-display device, has a hinged axis so that the parts can rotate relative to each other. A flexible connection member extends between the devices and has a fixed connection at one end within one of the devices. The opposite end of the flexible connection member is coupled to a first locking mechanism, which is slidable within the device as the parts rotate relative to each other around the hinged axis. A second locking mechanism has a fixed connection within the two-part device on a same side of the hinged axis as the first locking mechanism. With the two-part device in the open position, the first and second locking mechanisms couple together to lock the two-part device. However, when the two-part device is in a closed position, the first and second locking mechanisms are spaced apart. For example, the first locking mechanism can slide into contact with the second locking mechanism in the open position and can slide away from the second locking mechanism as the two-part device is unlocked and rotating away from the locked position. 
         [0009]    In another embodiment, the first and second locking mechanisms are coupled through a magnetic attraction. For example, the first locking mechanism can be a ferromagnetic material (e.g., iron, nickel, cobalt and associated alloys) and the second locking mechanism can be a magnetic material (e.g., iron, nickel, cobalt and associated alloys), meaning that it is one of the ferromagnetic materials that has been magnetized. 
         [0010]    In still other embodiments, a compression spring can be used to bias the slidable first locking mechanism towards the second locking mechanism when the flexible connection member has sufficient slack to allow such movement. The compression spring can be positioned at an angle with respect to the direction of movement of the first locking mechanism so that only a partial component of the force generated by the compression spring is exerted on the first locking mechanism. In this way, as the two-parts rotate away from the locked open position, the force exerted on the flexible connection member by the spring is relatively constant. 
         [0011]    In another embodiment, the flexible connection member can be mounted within an adjustment system that allows increasing the tension of the flexible connection member after the two-part device is assembled. For example, one or more screws can be exposed when the two-part device is in a closed position. The screws can be tightened so as to move a retaining bracket attached to the flexible connection member, which increases the tension thereon. 
         [0012]    The advantages of the hinged mechanism include the ability to lock the two-part device in an open position such that when the angular rotation of the parts is within a predefined range the device snaps open and locks in place. The magnets are sized to allow a user to break the magnetic connection so as to rotate the parts away from the open position, such as towards a closed position. Additionally, the angled compression spring allows the device to close without a substantial increase in rotational force. Finally, the flexible connection member can be tightened without taking the devices apart. 
         [0013]    As described herein, a variety of other features and advantages can be incorporated into the technologies as desired. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]      FIG. 1  shows a dual-display device coupled using hinges according to one embodiment described herein, wherein the dual-display device is shown rotating to various positions. 
           [0015]      FIG. 2A  shows the dual-display device with first and second parts in a locked, open position. 
           [0016]      FIG. 2B  shows that the first and second parts of the dual-display device are rotated relative to each other to break the locked connection. 
           [0017]      FIG. 3A  shows the parts of dual-display device continued to be rotated so as to increase a distance between locking mechanisms. 
           [0018]      FIG. 3B  shows the dual-display device in a closed position. 
           [0019]      FIG. 4  shows an assembly drawing of a single-spring embodiment of the hinge mechanism. 
           [0020]      FIG. 5  shows the single-spring embodiment of the hinge mechanism in operable form. 
           [0021]      FIG. 6A  shows a double-spring embodiment of the hinge mechanism in operable form. 
           [0022]      FIG. 6B  shows an assembly drawing of the double-spring embodiment. 
           [0023]      FIG. 7  shows a force-versus-position curve for the hinge mechanism. 
           [0024]      FIG. 8  shows an embodiment wherein serrated ends of the parts are used in conjunction with the hinge mechanism. 
           [0025]      FIG. 9  is a flowchart of a method according to one embodiment for using the hinge mechanism. 
       
    
    
     DETAILED DESCRIPTION 
       [0026]      FIG. 1  shows an embodiment of a hinged mobile electronic device  100  (a two-part device) comprising a first display part  110  and a second display part  120  coupled together with one or more hinges  130 ,  132 . The mobile electronic device  100  can be, for example, a hand-held device, such as a smart phone, or a portable computer, such as a lap-top. Each part  110 ,  120  can include a display and each part sits end-to-end with the hinges  130 ,  132  coupling the ends together with sufficient tension that the parts can pivot relative to each other around the ends. The mobile electronic device  100  is shown in an open position, also called a tablet mode, with the first and second display parts aligned in a plane so as to form a larger display area. As described further below, the mobile electronic device  100  snaps into the open position when a relative angle at which the parts sit is within a predetermined range (e.g.,  175 - 180  degrees) so as to lock in the open position. As shown in phantom lines  140 ,  142 , the second display part  120  can rotate counterclockwise relative to display part  110  or can rotate clockwise, as shown by phantom line  150 . When the display parts are outside of the predetermined range, then the parts unlock as described further below. In the unlocked position, the hinges  130 ,  132  allow a full  360  degrees of rotation between the first and second display parts  110 ,  120 . For purposes of brevity, the embodiments described herein are shown for two-display devices, but can be extended to additional display devices, such as  3  or more displays. 
         [0027]    The first and second display parts  110 ,  120  can comprise a plurality of user interface screens  160 ,  170 , respectively. The screens  160 ,  170  can be used for user input and/or display purposes. The screens  160 ,  170  can also be replaced with a plurality of smaller screens and/or other user interface mechanisms, such as a keyboard. Exemplary embodiments of the hinged mobile electronic device can comprise such user interface mechanisms on any surfaces and on any combination of surfaces as desired. 
         [0028]      FIG. 2A  shows the first and second parts  110 ,  120  in a snapped open position with the parts having top and bottom surfaces within the same plane. A hinge mechanism  200  includes a flexible connection member  210  coupled between the parts. The flexible connection member  210  is under tension so as to pull the first and second parts  110 ,  120  together. The flexible connection member  210 , can be any of a variety of different materials including a strap, a cable, a wire, a conductor, a belt, an optical fiber, a chain, etc. In some embodiments, the flexible connection member  210  can be a communications path so that electrical signals (e.g., power or data) can be passed between the parts. For example, a cable, wire, conductor, or an optical fiber can be used to transmit power and/or data between parts. Other materials, such as a chain or belt can provide different advantages in terms or strength or flexibility. 
         [0029]    The hinge mechanism  200  includes a frame  220 , which is physically connected to the part  120  using screws  222  or other mounting means. A first locking mechanism  230  is slidably mounted within the frame  220  and moves in channels  232  along side walls of the frame. The first locking mechanism  230  moves in a direction defined by a longitudinal axis of the flexible connection member, as shown by arrow  234 . The flexible connection member  210  is coupled at one end to the first locking mechanism  230  in any desired fashion, such as a loop-back and pin connection, which is illustrated. Other connection techniques can be used. At an opposite end  236  of the flexible connection member  210 , is a retaining bracket  237  having two outwardly facing flanges  238 . The retaining bracket  237  mounts in a retaining member  240  by using the outwardly facing flanges  238  to hook into the retaining member  240 . 
         [0030]    The first locking mechanism  230  is generally a ferromagnetic material (e.g., iron, nickel, cobalt and associated alloys). The ferromagnetic material can be non-magnetized but attracted to a magnet or the ferromagnetic material can be magnetized. In either case, the first locking mechanism  230  is designed to lock to a second locking mechanism  250  using magnetism. Thus, the second locking mechanism  250  can be a magnet that attracts the first locking mechanism  230  when they are in close proximity The first locking mechanism  230  is generally T-shaped and has notches for receiving compression springs  260 . The compression springs  260  are coupled in a corner of the frame  220  and angle inwardly to couple within the notches of the first locking mechanism. Different angles for the compression springs can be used, but generally angles between 40 and 60 degrees are used, such as the illustrated angle of about  45  degrees. 
         [0031]    In operation, the compression springs  260  urge the first locking mechanism  230  towards the second locking mechanism  250 . When the first locking mechanism  230  is within a predetermined distance from the second locking mechanism  250 , the magnetic forces between the two increase to lock the two together with a snap-open click. The first locking mechanism  230  moves towards the second locking mechanism  250  when there is slack in the flexible connection member  210 , which is when the first and second parts  110 ,  120  are in the open position. As described further below, when a user closes the parts, tension on the flexible connection member  210  increases to a threshold point sufficient to break the magnetic coupling force between the first and second locking mechanisms  230 ,  250 . At that point, the first and second parts  110 ,  120  unlock from the open position and rotate with a substantially constant rotational force. 
         [0032]    The parts  110  and  120  rotate relative to each other about an axis  280 . Notably, both locking mechanisms  230 ,  250  are on the same side of the axis, unlike a typical configuration with one magnetized locking mechanism on one part and an oppositely polarized magnet on the other part to close the parts together. The flexible connection member  210  is shown passing between the parts and is fixedly connected to an opposite part to which the locking mechanisms are located. However, the flexible connection member can be fixedly connected to part  110  and both locking mechanisms can also be in part  110  if the flexible connection member simply loops over a pin in the part  120  and continues back into part  110 . 
         [0033]      FIG. 2B  illustrates a transition from the locked, open state to an unlocked state due to the rotational energy caused by a user (not shown) rotating the part  120  relative to part  110 . As the part  120  rotates about a hinged axis  280 , the tension in flexible connection member  210  increases until it overcomes the magnetic force between the first and second locking mechanisms  230 ,  250  to break the connection there between, as is illustrated at  282 . A gap opens between the first and second locking mechanisms  230 ,  250  and once the gap is a sufficient distance, the force due to magnetism decreases rapidly. The compression forces due to the springs  260  continue to resist rotation of the parts, but with a substantially constant force due to the angle of the springs  260  relative to the direction  234  of movement. 
         [0034]      FIG. 3A  shows a continued transition from the open state in  FIG. 2A  to a state where the parts  110 ,  120  are at nearly 90 degrees. As the part  120  continues to rotate relative to part  110 , the gap shown at  310  opens to a distance D between the first and second locking mechanisms  230 ,  250  due to the limited reach of the flexible connection member. The compression spring force due to the springs  260  remains at a relatively constant value.  FIG. 3B  shows the parts  110 ,  120  in a closed state with the distance D ( 310 ) between the first and second locking mechanisms  230 ,  250  at a maximum. 
         [0035]      FIG. 4  shows an assembly drawing of a hinge mechanism  410  according to another embodiment. In this embodiment, the second locking mechanism  420  is formed by a magnet  422  sandwiched between iron sheets  424 ,  426 . The iron sheets serve to control the magnetic field formed by the magnet  422  so as to keep the magnetic field within the second locking mechanism. The iron sheets  424 ,  426  can be formed from any ferromagnetic material, such as those described above. A first locking mechanism  430  is labeled as a slider due to its function of sliding in a frame  440 . In this embodiment, the first locking mechanism  430  has a channel  450  for receiving bearings  452  that allow the slider to move easily within the frame  440 . A single spring  460  is used to bias the first locking mechanism  430  against the bearings  452  to allow low-friction sliding of the slider. The compression spring  460  is mounted on a pivot shaft  462  that extends from a corner  464  of the frame to a notch  466  on the first locking mechanism. A flexible connection member is shown as a belt  470  having loops at each end to receive belt locking pins  472 . A frame  474  (also called a retaining member) has holes there through into which a belt locking pin  472  can be inserted to couple the belt  470  to the frame  474 . A separate belt locking pin  472  couples the opposed end of the belt to the slider. The frame further includes a receptacle  480  for receiving an adjustment screw  482  that, when turned, moves the frame so as to increase or decrease tension on the belt  470 . In this case, the frame  474  is slidable and the adjustment screw  482  moves the frame  474  so as to increase tension in the belt  470 . There are a variety of different tightening techniques that can be used to increase tension in the flexible connection member and any known techniques can be used. 
         [0036]      FIG. 5  shows a top-down view of the hinge mechanism  410  assembled in a two-part device  510  having a first part  512  coupled to a second part  514 . The parts  512 ,  514  are coupled end-to-end and rotate around an axis of rotation shown by  520 . The parts  512 ,  514  are shown in a locked position with the first locking mechanism  430  in contact with the second locking mechanism  420  and the two parts  512 ,  514  positioned such that their top and bottom surfaces are within a same plane. The spring system  460  biases the first locking mechanism  430  (in this case a slider) towards the second locking mechanism  420 . Due to the  45  degree angle of the spring relative to a direction of movement of the first locking mechanism  430 , the spring energy is divided into X and Y components of force, with the X component of force pushing the first locking mechanism  430  against the bearings  452  and the Y component of force pushing the first locking mechanism  430  into contact with the second locking mechanism  420 . The adjustment screw  482  can be turned so as to increase tension on the belt  470 . To unlock the two parts  512 ,  514 , the parts can be rotated about the axis  520  with sufficient force to overcome the magnetic attraction between the first and second locking mechanisms  430 ,  420 . 
         [0037]      FIG. 6A  shows a top-down view of an embodiment of a hinge mechanism  600  that is described in  FIG. 2 . A first locking mechanism  230  is shown in contact with the second locking mechanism  250 , both of which are in a frame  220 . The springs  260  extend from a corner of the frame into a notch  231  of the first locking mechanism  230 . The springs  260  sit at a  45  degree angle, but other angles can be used. The flexible connection member  236  pulls the first locking member  230  away from the second locking member  250  when sufficient force is exerted on the flexible connection member. Using the hinge mechanism  600 , the parts can rotate around the illustrated axis  280 . 
         [0038]      FIG. 6B  shows an assembly drawing of the hinge mechanism  600 . The second locking mechanism  250  is a magnet  608  sandwiched between top and bottom magnetic shields  610 ,  620 . The magnetic shields are made of ferromagnetic material and ensure that the magnetic fields generated by the magnet  608  stay within a well-defined area so as to pass any necessary government testing of electromagnetic fields. 
         [0039]      FIG. 7  shows a force exerted on the first locking mechanism as it slides towards and away from the second locking mechanism. The force, in Newtons, is extremely high with the first locking mechanism in contact with the second locking mechanism, as shown at  710 . As the first locking mechanism moves away from the second locking mechanism, the force decreases rapidly and then becomes substantially constant (e.g., varying by only 5 Newtons) as shown at  720 . 
         [0040]      FIG. 8  shows ends  810 ,  812  of the first and second parts as serrated to facilitate rotation about the axis of rotation formed there between. Due to the tension on the flexible connection member  820 , the ends  810 ,  820  remain in contact with one another through the rotation of the parts. At  830 , the parts are in a closed position. As the first part rotates relative to the second part, the serrated edge defines the axis of rotation, shown at  840 , and ensures that the ends do not slip so as to alter the axis of rotation. As the parts approach the open position at  850 , the magnetic force increases to a point that the parts snap open with the locking devices clicking together so that the parts are in the open tablet mode, as shown at  860 . 
         [0041]      FIG. 9  is a flowchart of a method according to one embodiment for connecting first and second parts using a hinged mechanism. In process block  910 , a flexible connection member is coupled to the first part of the device. Typically, the flexible connection member has a first end that is a fixed connection within a retaining member on one of the parts. As described above, the retaining member can be moveable so as to increase tension on the flexible connection member. Alternatively, a retaining bracket coupled to the flexible connection member and used to mount the flexible connection member to the retaining member can be moveable so as to increase the tension. The flexible connection member can be any of a variety of materials, including, but not limited to a cable, a wire, a conductor, a belt, a strap, an optical fiber, or a chain. 
         [0042]    In process block  920 , a first locking mechanism is provided. The first locking mechanism can be a ferromagnetic material or a magnetic material of opposite polarity to a second locking mechanism. The first locking mechanism can have a variety of geometric shapes, but generally has at least one notch therein for receiving a spring. The first locking mechanism also has a connection means for connecting to the flexible connection member. Example connection means include having a receptable for receiving a locking pin that slides through a loop of the flexible connection member. Other connection means can be used. 
         [0043]    In process block  930 , a second locking mechanism is provided. The second locking mechanism can be ferromagnetic material or magnetic material of an opposite polarity to the first locking mechanism. There are a variety of combinations of materials for the first and second locking mechanisms but the materials should be so chosen that there is a magnetic attraction there between. The second locking mechanism can be fixed within a same part as the first locking mechanism Thus, the first and second locking mechanisms can be on a same side of an axis of rotation between the two parts. The flexible connection member, by contrast, passes between the parts with tension so as to assist in maintaining ends of the parts in close proximity 
         [0044]    In process block  940 , a spring is inserted within the part in which the first locking mechanism is located so as to push the first locking mechanism towards the second locking mechanism. As shown in process block  950 , when the parts are in a closed position, with surfaces of the devices face-to-face, the tension on the flexible connection member is sufficient to maintain a gap between the first and second locking mechanisms. However, when the parts are in an open position, the flexible connection member has sufficient slack to allow the spring to push the first locking mechanism into contact with the second locking mechanism. 
         [0045]    Although the operations of some of the disclosed methods are described in a particular, sequential order for convenient presentation, it should be understood that this manner of description encompasses rearrangement, unless a particular ordering is required by specific language set forth below. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed methods can be used in conjunction with other methods. 
         [0046]    The following paragraphs further describe embodiments of the hinge mechanism: 
         [0047]    A. A hinge mechanism within an at least a two-part device having a hinged axis there between, comprising: 
         [0048]    a flexible connection member having a first end coupled on one side of the hinged axis within one of the parts; 
         [0049]    a first locking mechanism coupled to a second end of the flexible connection member, the first locking mechanism being slidable as the two parts rotate relative to each other around the hinged axis; and 
         [0050]    a second locking mechanism that is fixed on a same side of the hinged axis as the first locking mechanism, wherein the first and second locking mechanisms couple together to lock the two-part device in an open position and wherein the first and second locking mechanisms are spaced apart with the two-part device in a closed position. 
         [0051]    B. The at least two-part device of paragraph A, wherein the first locking mechanism and the second locking mechanism are made from ferromagnetic material and magnetic material so that the two parts snap into the open position when the first and second locking mechanisms couple together. 
         [0052]    C. The at least two-part device of paragraphs A or B, further including a frame in which the first locking mechanism slides towards and away from the second locking mechanism. 
         [0053]    D. The at least two-part device of paragraphs A-C, further including a compression spring to bias the first locking mechanism towards the second locking mechanism. 
         [0054]    E. The at least two-part device of paragraph D, wherein the compression spring is positioned at an angle with respect to a direction in which the first locking mechanism slides. 
         [0055]    F. The at least two-part device of paragraphs A-E, wherein the flexible connection member is coupled to an adjustment frame that is moveable to tighten the flexible connection member. 
         [0056]    G. The at least two-part device of paragraphs A-F, wherein the second locking mechanism is a magnet having top and bottom magnetic shields mounted thereto. 
         [0057]    H. The at least two-part device of paragraphs A-G, wherein the flexible connection member is one of the following: a cable, a wire, a conductor, a belt, an optical fiber, or a chain. 
         [0058]    I. The at least two-part device of paragraphs A-H, wherein the flexible connection member has the first end fixedly attached within a first of the two-part device and the first and second locking mechanisms are positioned within a second of the two-part device. 
         [0059]    J. A method of coupling first and second devices using a hinge mechanism, comprising: 
         [0060]    providing a flexible connection member coupled in the first device; 
         [0061]    providing a first locking mechanism coupled to one end of the flexible connection member, the first locking mechanism slideably coupled within the second device; 
         [0062]    providing a second locking mechanism coupled within the second device; 
         [0063]    inserting a spring to bias the first locking mechanism towards the second locking mechanism; 
         [0064]    wherein the first locking mechanism is coupled to the second locking mechanism with the first and second devices in an open position, and wherein the first and second locking mechanisms are spaced apart with the first and second devices in a closed position. 
         [0065]    K. The method of paragraph J, wherein the first locking mechanism is a ferromagnetic material or a magnetic material and the second locking mechanism is a ferromagnetic material or a magnetic material so that the first locking mechanism and second locking mechanism have magnetic attraction there between. 
         [0066]    L. The method of paragraphs J-K, wherein the spring is angled with respect to a direction in which the first locking mechanism slides. 
         [0067]    M. The method of paragraphs J-L, wherein when the first device and second device approach the open position, the first locking mechanism and second locking mechanism have an attractive force that results in a snap open action between the first and second devices, and when the first and second devices approach a closed position, the spring generates a substantially constant force through a closing of the first and second devices. 
         [0068]    N. The method of paragraphs J-M, further including adjusting a tension in the flexible connection member while the first and second devices are coupled together. 
         [0069]    O. The method of paragraphs J-N, wherein adjusting the tension includes screwing a screw that pushes on a retaining bracket coupled to the flexible connection member. 
         [0070]    P. A hinge for coupling first and second electronic devices, comprising: 
         [0071]    a retaining member positioned on the first electronic device; 
         [0072]    a flexible connection member having a retaining bracket at one end thereof mounted within the retaining member to secure the flexible connection member to the first electronic device; 
         [0073]    a first locking mechanism made from ferromagnetic material or magnetic material coupled to an opposed end of the flexible connection member, the first locking mechanism housed within a second electronic device so that the flexible connection member extends between the first and second electronic devices; 
         [0074]    a second locking mechanism made of ferromagnetic material or magnetic material that is magnetically attracted to the first locking mechanism, the second locking mechanism being within the second electronic device; and 
         [0075]    wherein the first locking mechanism and the second locking mechanism are positioned such that they are in contact with the first electronic device and second electronic device in an open position and they are spaced apart with the first electronic device and second electronic device in a closed position. 
         [0076]    Q. The hinge of paragraph P, wherein the retaining member has at least one threaded receptacle there through in which a screw is mounted, and wherein an end of the screw is in contact with the retaining bracket to selectively increase tension in the flexible connection member. 
         [0077]    R. The hinge of paragraphs P-Q, further including a spring positioned within the second electronic device and coupled to urge the first locking mechanism towards the second locking mechanism. 
         [0078]    S. The hinge of paragraphs P-R, wherein first locking mechanism is slidable within the second electronic device along an axis and the spring bears on the first locking mechanism at an angle with respect to the axis. 
         [0079]    T. The hinge of paragraphs P-S, wherein the flexible connection member is one of the following: a cable, a wire, a conductor, a belt, an optical fiber, or a chain. 
         [0080]    The disclosed methods, apparatus, and systems should not be construed as limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and subcombinations with one another. The disclosed methods, apparatus, and systems are not limited to any specific aspect or feature or combination thereof, nor do the disclosed embodiments require that any one or more specific advantages be present or problems be solved. 
         [0081]    In view of the many possible embodiments to which the principles of the disclosed invention may be applied, it should be recognized that the illustrated embodiments are only preferred examples of the invention and should not be taken as limiting the scope of the invention. Rather, the scope of the invention is defined by the following claims. We therefore claim as our invention all that comes within the scope of these claims.