Abstract:
A magnetic closure apparatus for portable computers that utilizes magnetic attraction and repulsion to allow users to open and close the first housing member and second housing member of said portable computer. The first housing member has a computer and a magnetic member disposed at its inward edge. The second housing member has a magnetic apparatus, which comprises a magnetic member disposed at its inward edge corresponding to the position of the magnetic member disposed on the second housing member and a sliding member which interlinks with the magnetic member. The polarity of the magnetic field of the magnetic member disposed on the second housing member is the opposite of the polarity of the magnetic field of the corresponding magnetic member disposed at the first housing member. Moving the sliding member enables the movement of the dual layer magnetic member, thereby allowing the closure and opening of the first housing member and second housing member.

Description:
REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority to Taiwan application no. 090102243 Entitled “Magnetic closure apparatus for portable computers” filed on Feb. 2, 2001. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention generally relates to a closure apparatus for portable computers, and in particular to a magnetic closure apparatus for portable computers. With magnetic attraction and repulsion force, the present invention allows users to lock (referring to a portable computer in a closed position) and unlock (referring to a portable computer in an open position) their portable computer. Moreover, it is also applicable to portable computers with 180-degree reversible top housing. 
     2. Description of the Related Art 
     Mechanical latches are commonly applied among portable electronic devices such as notebook computers, electronic dictionaries, PDAs (personal digital assistants), electronic books, and PDA based stock reporters, to allow users to lock and unlock portable devices comprising two parts; the display or top housing and the base housing or the computer system. Referring to FIG. 1, a perspective view of a prior art mechanical latch for a portable computer is illustrated. When latch hook  2  and latch hole  7  are latched, the first housing member  4  and second housing member  3  are in a closed position, as shown in FIG.  1 . Using latch  1  enables users to disengage the closed position between latch hook  2  and latch hole  7 . Users grasp the second housing member  3  and lift it upwardly to direct it to the open position. 
     Considerable progress has been made in portable computer applications and designs in recent years, which have in turn presented computer engineers with new challenges. As such, conventional designs such as mechanical latches have come to seem inadequate relative to the latest portable computer applications. For example, a mechanical latch is unable to lock and unlock a portable computer when it has a 180-degree reversible second housing member. Because a mechanical latch involves engaging the latch hook and latch hole to close a portable computer, the addition of a second housing member to a portable computer with a 180-degree reverse, means that a conventional mechanical latch cannot be used. This is true because after reversal the portable computer panel  5  faces down and the portable computer bezel  6  faces up. In such a situation the latch hook on the front side on the second housing member and latch hole on the first housing member are placed in a back to back position, making the engagement of the latch hook and latch hole unworkable. Accordingly, the portable computer cannot be closed properly. 
     When the prior art mechanical latch is engaged, in a closed position, it leaves a small gap between first housing member  4  and second housing member  3 , which creates an aesthetically unpleasing appearance. In addition, when the portable computer is in an open position, latch hook  2  is exposed and may potentially damage the portable computer by tangling with other objects or wires around the work area. 
     SUMMARY OF THE INVENTION 
     The object of the present invention is to provide a magnetic closure apparatus for portable computers used to bring the first housing member and second housing member of a portable computer to a closed position. By moving the sliding member on the second housing member, the magnetic member on the second housing member is moved, generating a relative displacement between the magnetic members on the first and the second housing members. As a result, the magnetic attraction and repulsion between the two sliding members can be used to bring the first housing member and second housing member to closed and open positions respectively. 
     Another object of the present invention is to provide a magnetic closure apparatus for portable computers, which is also applicable to a portable computer with a 180-degree reversible second housing member. By moving the sliding member on the second housing member, the magnetic member on the second housing member is moved and generates a relative displacement between the magnetic member on the first and second housing members. As a result, the magnetic attraction and repulsion between the two sliding members can be used to bring the first housing member and second housing member to closed and open positions respectively. 
     Still another object of the present invention is to provide portable computers with a magnetic closure apparatus to ensure the first housing member and the second housing member of the portable computer are firmly closed, whilst at the same time avoiding potential damage resulting from accidents caused by an exposed latch hook tangling with objects or wires in the work area. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The following detailed description, which is given by way of example, and not intended to limit the invention to the embodiments described herein, can best be understood in conjunction with the accompanying drawings, in which: 
     FIG. 1 is a perspective view of a prior art mechanical latch for a portable computer; 
     FIG. 2 is a perspective view of the magnetic closure apparatus for a portable computer in accordance with the first preferred embodiment of the present invention; 
     FIG. 3 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 1 -A 2  in the FIG. 2 in accordance with the first preferred embodiment; 
     FIG. 4 is a simplified diagram of the movement between the dual layer magnetic member and the first single layer magnetic member of the magnetic closure apparatus parallel to lines X 1 -X 2  in the FIG. 2 in accordance with the first preferred embodiment; 
     FIG. 5 is a perspective view of the magnetic closure apparatus for a portable computer in accordance with the second preferred embodiment of the present invention; 
     FIG. 6 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 3 -A 4  in the FIG. 5 in accordance with the second preferred embodiment; 
     FIG. 7 is a simplified diagram of the movement between the second single layer magnetic member and the third single layer magnetic member of the magnetic closure apparatus parallel to lines X 3 -X 4  in the FIG. 5 in accordance with the second preferred embodiment; 
     FIG. 8 is a perspective view of the magnetic closure apparatus for a portable computer in accordance with the third preferred embodiment of the present invention; 
     FIG. 9 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 5 -A 6  in the FIG. 8 in accordance with the third preferred embodiment; and 
     FIG. 10 is a simplified diagram of the movement between the fourth single layer magnetic member and the fifth single layer magnetic member of the magnetic closure apparatus parallel to lines Y 1 -Y 2  in the FIG. 8 in accordance with the third preferred embodiment. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     First Preferred Embodiment: 
     FIG. 2 illustrates a magnetic closure apparatus used in a portable electronic device such as notebook computer, electronic dictionary, PDA, electronic book or PDA based stock reporter in accordance with the present invention. Utilizing the magnetic attractive and repulsive force between different magnetic poles, the present invention allows users to control the position of the first and second housing members of a portable computer. 
     The magnetic closure apparatus for a portable computer comprises a first housing member  31  and a second housing member  32 , wherein the first housing member  31  has a computer system  37  and a first single layer magnetic member  51 . The second housing member  32  has a magnetic apparatus  33  including a dual layer magnetic member  52 , a sliding member  38  linked with the dual layer magnetic member  52 , and an LCD (liquid crystal display) module  39 , having a LCD  36 , a panel  34  and a bezel  35 . 
     FIG. 3 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 1 -A 2  in the FIG.  2 . The magnetic apparatus  33  further comprises a dual layer magnetic member  52  disposed at the inward edge on the second housing member  32  between the panel  34  and bezel  35  and a sliding member  38  disposed at the edge portion on the second housing member  32 , linked with the dual layer magnetic member  52 . Further, the first single layer magnetic member  51  is disposed at the inward edge of the first housing member  31  which corresponds to the position of the dual layer magnetic member  52  on the second housing member  32 . 
     FIG. 4 is a simplified diagram of the movement between the dual layer magnetic member and the first single layer magnetic member of the magnetic closure apparatus parallel to lines X 1 -X 2  in FIG.  2 . Magnetic field polarity in the dual layer magnetic member  52  in FIG. 4 is opposite. The polarity of the first single layer magnetic member  51  magnetic field is the opposite of the polarity of the bottom layer of the dual layer magnetic member  52 . As shown in the left of FIG. 4, the dual layer magnetic member  52  above, and the first single layer magnetic member  51  beneath, attract each other as a result of magnetic attraction, therefore the portable computer is in the closed position. However, if users wish to disengage the closed position and direct the portable computer to an open position by sliding the sliding member  38  which is linked to the dual layer magnetic member  52 , a relative position displacement then is caused between the dual layer magnetic member  52  and the firs single layer magnetic member  51 . It follows that the magnetic force between the dual layer magnetic member  52  and the first single layer magnetic member  51  then transforms from attraction to repulsion as shown at the right of FIG.  4 . Consequentially, the portable computer is moved to an open position. In brief, by sliding the sliding member  38  and generating position displacement between the second housing member  32  and first housing member  31 , users are able to determine whether their portable computer is in a closed or opened position. 
     Additionally, when the second housing of a portable computer is reversible, a 180-degree reverse on the second housing member causes the panel on the second housing member to face upwards. Because the magnet disposed at the second housing member is dual-layered, the position between dual layer magnetic member  52  and the facing first single layer magnetic member  51 , with respect to the magnetic field, remains the same as prior to the reverse. This means that the first single layer magnetic member  51  and the dual layer magnetic member  52  still attract each other as shown on the left of FIG.  4 . In this way, the method used to control the position of portable computer members is not changed. With this method users move the sliding member, which then enables movement of the dual layer magnetic member  52  using magnetic attraction and repulsion, to allow opening and closure between the first housing member  51  and the second housing member  52 . 
     Second Preferred Embodiment: 
     FIG. 5 illustrates a magnetic closure apparatus used in portable electronic devices such as notebook computers, electronic dictionaries, PDA, electronic books and PDA based stock reporters, in accordance with the present invention. Utilizing the magnetic attraction and repulsion between different magnetic poles, the present invention allows users to control the position of the first housing member and second housing member of a portable computer. 
     The magnetic closure apparatus for a portable computer comprises a first housing member  21  and a second housing member  22 , wherein the first housing member  21  has a computer system  24  and a second single layer magnetic member  41 . The second housing member  22  has a magnetic apparatus  23  including a third single layer magnetic member  42 , and a sliding member  28 , linked with the third single layer magnetic member  42 . 
     FIG. 6 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 3 -A 4  in the FIG.  5 . Referring to FIG. 6, the magnetic apparatus  23  further comprises a third single layer magnetic member  42  disposed at the inward edge on the second housing member  22  and a sliding member  28  disposed at the edge portion on the second housing member  22 , linked with the a third single layer magnetic member  42 . Further, the second single layer magnetic member  41  is disposed at the inward edge of the first housing member  21  which corresponds to the position of the third single layer magnetic member  42  on the second housing member  22 . 
     FIG. 7 is a simplified diagram of the movement between the second single layer magnetic member and the third single layer magnetic member of the magnetic closure apparatus parallel to lines X 3 -X 4  in the FIG.  5 . In FIG. 7, the second single layer magnetic member  41  is illustrated. The polarity of the third single layer magnetic member  42  magnetic field is the opposite of that for the second single layer magnetic member  41 . As shown on the left of FIG. 4, the second single layer magnetic member  41  beneath, and the third single layer magnetic member  42  above, attract each other as a result of magnetic attraction, therefore the portable computer is in a closed position. 
     However, if users wish to disengage the closed position and direct the portable computer to an open position, they can do this by moving the sliding member  28 , which is linked to the third single layer magnetic member  42 . A relative position displacement is then formed between the third single layer magnetic member  42  and the second single layer magnetic member  41 . It follows that the magnetic force between the third single layer magnetic member  42  and the second single magnetic member  41  then transforms from attraction to repulsion as shown at the right of FIG.  4 . Consequentially, the portable computer is in an open position. In brief, by moving the sliding member  28  and generating position displacement between the second housing member  22  and first housing member  21 , users are able to control whether their portable computer is in an open or closed position. 
     Third Preferred Embodiment: 
     FIG. 8 illustrates a magnetic closure apparatus used in portable electronic devices such as notebook computers, electronic dictionaries, PDA, electronic books and PDA based stock reporters, in accordance with the present invention. Utilizing the magnetic attraction and repulsion between different magnetic poles, the present invention allows users to control the position of the first housing member and second housing member of a portable computer. 
     The magnetic closure apparatus for a portable computer comprises a first housing member  61  and a second housing member  62 , wherein the first housing member  61  has a computer system  64  and a fourth single layer magnetic member  65 . The second housing member  62  has a magnetic apparatus  63 , including a fifth single layer magnetic member  66 , and a sliding member  68 , linked with the fifth single layer magnetic member  66 . 
     FIG. 9 illustrates a magnified cross section view of the magnetic closure apparatus for a portable computer taken along lines A 5 -A 6  in FIG.  8 . Referring to FIG. 9, the magnetic apparatus  63  further comprises a fifth single layer magnetic member  66  disposed at the inward edge on the second housing member  62  and a sliding member  68  disposed at the edge portion on the second housing member  62  linked with the a fifth single layer magnetic member  66 . Further, the fourth single layer magnetic member  65  is disposed at the inward edge of the first housing member  61  which corresponds to the position of the a fifth single layer magnetic member  66  on the second housing member  62 . 
     FIG. 10 is a simplified diagram of the movement between the second single layer magnetic member and the third single layer magnetic member of the magnetic closure apparatus parallel to lines Y 1 -Y 2  in the FIG.  8 . In FIG. 10, the fourth single layer magnetic member  65  is illustrated. The polarity of the fifth single layer magnetic member  66  magnetic field is the opposite of that for the fourth single layer magnetic member  65 . As shown on the left of FIG. 4, the fourth single layer magnetic member  65  beneath, and the fifth single layer magnetic member  66  above, attract each other as a result of magnetic attraction, therefore the portable computer is in a closed position. 
     However, if users wish to disengage the closed position and direct the portable computer to an open position by moving the sliding member  68 , which is linked to the fifth single layer magnetic member  66 , a relative position displacement is created between the fifth single layer magnetic member  66  and the fourth single layer magnetic member  65 . It follows that the magnetic force between the fifth single layer magnetic member  66  and the fourth single layer magnetic member  65  then transforms from attraction to repulsion as shown at the right of FIG.  4 . Consequentially the portable computer is in an open position in brief, by moving the sliding member  68  and generating position displacement between the second housing member  22  and first housing member  61 , users are able to determine whether the portable computer is in an open or closed position. 
     Although the invention has been described with a great degree of detail, it is to be understood that numerous changes can be made thereto without departing from the spirit and scope of the invention. The full scope of the present invention is to be limited only by the meaning and range of equivalency of the following claims.