Abstract:
A multi-stages retractable coiling cord is disclosed. The coiling cord comprises a front cover, a spiral spring, a sliding disc, a retraction cord, a positioning bead and a rear cover. The cord is retracted and is positioned once when the sliding disc rotates once. A slight pull will allow the coiling cord to release from engaging.

Description:
BACKGROUND OF THE INVENTION 
   (a) Technical Field of the Invention 
   The present invention relates to a coiling cord, and in particular, to a coiling cord used in a computer mouse such that an appropriate cord is retracted and positioned to facilitate application. 
   (b) Brief Description of the Prior Art 
   The length of a cord connecting a mouse to a computer is always fixed and it cannot be adjusted to comply with the need of the user. Accordingly, it is very often that the length is either too long or too short and therefore, it is rather troublesome in controlling the mouse. Conventional way of providing an appropriate length of the cord connecting to a computer mouse is by coiling the cord manually a plurality of rounds and is then tighten with a rubber band or a thread. However, the fight tied end of the cord may affect the quality of the cord during application. Accordingly, it is an object of the present invention to provide a multi-stages retractable coiling cord device which mitigates the above drawbacks. The retractable coiling cord provides a high quality and efficient application. 
   SUMMARY OF THE INVENTION 
   It is an object of the present invention is to provide a multi-stages retractable coiling cord which allows an appropriate length of the cord to be retracted automatically. 
   Still another object of the present invention is to provide a multi-stages retractable coiling cord device, wherein the appropriate length of the cord can be accurately positioned. 
   A further object of the present invention is to provide a multi-stages retractable coiling cord device, wherein the retractable cord can be easily and rapidly restored to its original position for easy operation. 
   Yet still another object of the present invention is to provide a multi-stages retractable coiling cord device, wherein the retractable coiling cord device can be made into a miniature unit. 
   The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. 
   Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a coiling retractable cord of a preferred embodiment in accordance with the present invention. 
       FIG. 2  is an exploded perspective view of the coiling retractable cord of the present invention. 
       FIG. 3  is a perspective view of the sliding disc of the coiling retractable cord of the present invention. 
       FIG. 4  is a sectional view of the coiling retractable coiling cord of the present invention. 
       FIG. 5  is a schematic view showing the retracting movement of a computer mouse in accordance with the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims. 
   Referring to  FIGS. 1 and 2 , the retractable coiling cord device comprises a front cover  1 , a spiral spring  2 , a sliding disc  3 , a retraction cord  4 , a positioning cord  5  and a rear cover  6 . The spiral spring  2  is inserted within the front direction edge seat  31  of the sliding disc  3  and has a center end  21  in engagement with the center shaft  11  of the inner edge of the front cover  1 . The external edge end of the spiral spring  2  is provided with a bending section  22  to be inserted into the edge slit  311  at the edge seat  31  of the sliding disc and is engaged at the circumferential wall of the edge seat  31  such that the spiral spring  2  is restricted between the front cover  1  and the sliding disc  3  with respect to the center end  21  and the bending section  22  at the external edge end. Thus, the automatic rotation in a front direction or a rear direction, the spiral spring is always at a taut situation. 
   Referring to  FIG. 3 , the sliding disc  3  has a front direction edge seat  31  and a rear direction edge seat  32 , and the front direction edge seat  31  has a through hole  313  provided on a blocking plate  312  to allow the retraction cord  4  to pass to the rear direction face and the retraction cord  4  is formed into a front direction retraction cord  4  and rear direction retraction cord with different face. The retraction cord  4  is rolled at the external edge at the front direction edge seat  31  and the rear direction edge seat  32 . 
   The front direction retraction cord  4  and the rear direction retraction cord  4  are of same cord and are of equal length. The retraction cord  4  uses the clip plate  321  to secure the rear direction retraction cord  4  such that the front direction retraction cord  4  will not enter into the range of the rear direction retraction cord  4  due to pulling force and the rear direction retraction cord  4  will not enter the range of the front direction retraction cord  4 . In other words, the lengths for both the cord are always equal. Accordingly, when the front direction retraction cord  4  is pulled, its rear direction retraction cord  4  is retracted. When the front direction retraction cord  4  is at the restored position and the rear direction retraction cord  4  is at a coiled position. The front direction retraction cord  4  and the rear direction retraction cord  4  are of equal length and are of corresponding movement. Thus, when the retraction cord  4  is pulled, the retraction cord  4  at other direction will not be affected and when the cord  4  is positioned at the final position, it will be secured by the clip plate  321 . Thus, the front direction retraction cord end can be an externally connected conductive end or transmission end, and the conductive end extended from the rear direction retraction cord  4  and is connected to the interior of an object, as shown in FIG.  5 . 
   Referring to  FIGS. 2 and 4 , the front cover  1  has a center shaft  11  at the inner edge to pivotally mount to the center hole  33  of the sliding disc  3 . A screw nut  62  passing through the center hole  61  of the rear cover  6  is used for locking so that the sliding disc  3  is restricted between the front cover  1  and the rear cover  6  to form a self rotatable mechanism. Thus, when the front direction retractable cord  4  is pulled, which is equivalent to rotating the sliding disc  3  and when the front direction retractable cord  4  is restored to its original position, the sliding disc  3 , due to the rear direction rotation of the spiral spring  2  will pull out the retraction cord  4 . In addition, there is a positioning slot  341  on the rear direction seat  34  of the sliding disc  3  and the railing slot  341  is provided with a limiting end  342 , and the positioning bead  5  is positioned at the corresponding limiting slot  63  corresponding to the rear cover  6  such that the positioning bead  5  is only positioned at the limiting slot  63  to produce the up and down reciprocation movement. Thus, when the front direction retraction cord  4  pulls the sliding disc to move one round, a positioning mechanism is generated. If the retraction cord  4  is pulled to exceed the second positioning structure, the next positioning is achieved subsequently. Accordingly, the present invention allows multiple stages of positioning when the retraction cord is pulled or retracted. 
   It will be understood that each of the elements described above, or two or more together ray also find a useful application in other types of methods differing from the type described above. 
   While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.