Abstract:
A storage medium administration apparatus is electrically connected to a computer. The storage medium administration apparatus has a plurality of child storage modules. The structure and function of the child storage modules are described as follows: a switch sends a message to a computer for modifying record status when it switches; a latch locks and unlocks the storage medium by a command from the computer; and a spring pushes the storage medium which is unlocked by the latch.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of Invention  
           [0002]    The present invention relates to a storage medium administration apparatus. More particularly, the present invention relates to a storage medium apparatus controlled by administration means.  
           [0003]    2. Description of Related Art  
           [0004]    There are several types of digital storage media, such as Audio CD, Video CD (VCD), Digital Video Disk (DVD) on the market at present. Storage medium administration becomes a issue because of its enormous quantity. Conventionally, storage medium is put into the slot of storage apparatus without administration. Thus, searching the desired storage medium wastes time. Besides, the storage medium is easily lost because nobody knows who takes or returns the storage medium.  
           [0005]    For example, in movie or film rental shop, storage media (such as Audio CD, Video CD, Digital Video Disk are available in large amounts. Searching for the desired storage medium still wastes time even though a computer is used to register all storage media rented out or returned. Besides, renting out and returning registration need to be executed manually. If someone forgets to perform registration when storage media are taken out or put in the slot of a storage apparatus, the record status in the computer is not identical to the real status in the slot of the storage apparatus.  
           [0006]    For the forgoing reasons, there is a need to reduce searching time and administration problems of storage media because of the enormous quantity storage media.  
         SUMMARY OF THE INVENTION  
         [0007]    It is therefore an objective of the present invention to provide a storage medium administration apparatus to control large amounts of storage media.  
           [0008]    In accordance with the foregoing and other objectives of the present invention, a storage medium administration apparatus is electrically connected to a computer. The storage medium administration apparatus comprises a plurality of child storage modules. The structure and function of the child storage modules are described below. A switch sends a message to a computer for updating record status when it switches. A latch locks the storage medium, and unlocks the storage medium by a command from the computer; a spring pushes a storage medium which is unlocked by the latch.  
           [0009]    The latch mentioned above locks the storage medium by a tensile force of a spring. The latch unlocks the storage medium while a muscle wire pulls the latch. The muscle wire shortens and generates a tensile force when it is heated using electric current.  
           [0010]    In conclusion, the invention has advantages as follows:  
           [0011]    1. The muscle wire, used in present invention, has a small volume and can be heated by electric current. In addition, the muscle wire operates quickly and accurately.  
           [0012]    2. A switch is used rather than executing registration.  
           [0013]    3. The present invention reduces the search time for the storage medium.  
           [0014]    It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]    The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings,  
         [0016]    [0016]FIG. 1 illustrates a storage medium administration apparatus according to a preferred embodiment of the present invention;  
         [0017]    [0017]FIG. 2 illustrates a child storage module pushing out a storage medium according to one preferred embodiment of this invention; and  
         [0018]    [0018]FIG. 3 illustrates a storage medium inserted into a child storage module according to one preferred embodiment of this invention. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0019]    Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.  
         [0020]    In one preferred embodiment of the present invention, a storage medium administration apparatus, electrically connecting to a computer, can register storage media taken or returned automatically without manual searching for storage media.  
         [0021]    [0021]FIG. 1 illustrates a storage medium administration apparatus according to a preferred embodiment of the present invention. The storage medium administration apparatus comprises a computer  10 , a storage medium apparatus  15  and a plurality of child storage modules  20 . The left side of FIG. 1 is enlarged detail of the child storage modules  20  in a top plane view. A latch  25 , mounted in the child storage module  20 , can hook the slot on a outer case of a storage medium  45  to prevent storage medium  45  from sliding out of the child storage module  20 . The latch  25 , connected to the child storage module  20  with a pivot  28 , locks the storage medium  45  with a spring  27  creating a tensile force pulling the latch  25 . A muscle wire  30  pulls the latch  25  against the spring  27  tensile force and unlocks the storage medium  45  when muscle wire  30  receives a release command from the computer  10 .  
         [0022]    Referring to FIG. 1, a switch  40  in the child storage modules  20  is used to sense and update the record status in the computer  10  when the switch  40  is turned on or off. For example, the storage medium  45  pushes down the switch  40  when the latch  25  locks the storage medium  45  in the child storage modules  20 . The computer  10  then receives a signal from the switch  40  and indicates that there is a storage medium  45  in the child storage module  20 . On the contrary, the storage medium  45  releases the switch  40  when the latch  25  unlocks the storage medium  45  and a spring  29  pushes the storage medium  45  out of the child storage module  20 . The computer  10  then receives a signal from the switch  40  and indicates that there is nothing in the child storage module  20 .  
         [0023]    The muscle wire  30  mentioned above is a kind of metal alloy, and its physical feature is named Shape Memory Effect (SME). This type of muscle wire metal alloy has a unitary lattice structure which can vary at different temperatures. The muscle wire alloy can shape (extend or shorten) much more than other metals during transition temperature. For example, the muscle wire alloy can extend under transition temperature and shorten if the muscle wire alloy is heated above transition temperature. In one preferred embodiment, the muscle wire  30  generates a force pulling the latch  25  to unlock the storage medium  45  when it shortens by heating. When the muscle wire  30  cools off (under transition temperature), it recovers its original length.  
         [0024]    The muscle wire provides a pulling force which is several times heavier than its weight. It operates smoothly, quickly, and accurately. In addition, the muscle wire&#39;s volume size is small enough to fit in the child storage module  20 . In one preferred embodiment, the muscle wire&#39;s temperature rises and pulls the latch  25  when electric current passes through the muscle wire.  
         [0025]    The description below describes how the storage medium is administered in one preferred embodiment. (Referring to FIG. 1). When the desired storage medium  45  needs to be taken out of the storage medium apparatus  15 , a push command for the desired storage medium  45  is delivered from the computer  10  to the child storage module  20 . (Referring to FIG. 2). The muscle wire  30  heated by electric current shortens and pulls the latch  25 . The storage medium  45  is pushed out of the child storage module  20  and releases the switch, updating the record status in the computer  10 . Afterwards, the muscle wire  30  recovers its original length and the latch  25  returns to its original position when the temperature cools to below the transition temperature.  
         [0026]    In contrast, with reference to FIG. 3, when the desired storage medium  45  needs to be returned to the child storage module  20 , the storage medium  45  is manually inserted into the child storage module  20  until the latch  25  hooks the slot on a outer case of a storage medium  45 . Meanwhile, the switch  40  is pushed down by the storage medium  45  and the record status in the computer  10  is updated without extra registration.  
         [0027]    In conclusion, the invention has advantages as follows:  
         [0028]    1. The muscle wire, used in present invention, has a small volume and can be heated by an electric current. In addition, the muscle wire operates quickly and accurately.  
         [0029]    2. The switch is used rather than executing registration.  
         [0030]    3. The present invention reduces the search time for the storage medium.  
         [0031]    It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.