Abstract:
A positioning peg structure of a single-pull reel is disclosed. The positioning structure provides the function of positioning of the cord after a second pull following the first pull of the cord. When the cord is pulled to rotate one round, a first positioning mechanism is formed. Thus, when the cord is pulled in one direction once, the cord is controlled to provide a plurality of multiple positioning such that the pulling distance can be precisely controlled.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    (a) Technical Field of the Invention 
         [0002]    The present invention relates to peg structure for positioning a cord of a reel. 
         [0003]    (b) Description of the Prior Art 
         [0004]      FIGS. 9 and 10  show a conventional reel A 10  employing steel bead as the positioning structure. The reel A 10  comprises a front cover A 1 , a spiral spring A 2 , a sliding seat A 3 , a transmission line A 4 , a positioning bead A 5  and a rear cover A 6 . In this conventional reel, the spring A 2  is used to restore the transmission line A 4  and a steel bead A 5  positioning structure is used. A multiple steel bead track A 31  is provided at the bottom section of the sliding seat A 3  to allow the steel bead A 5  to roll along the track A 31  and to engage. The designing of the track for the steel bead is difficult with respect to precision and the producing of a mold is laborious. Thus, the yield of the assembly will not be improved, and the cost of production will be increased. 
         [0005]    Another drawback is that the friction of the track  31  or the gap formed is too large, this will cause the engagement being not possible. Thus, such conventional structure A 10  is commonly not functioning or failure in engagement. Further, the transmission line cannot be gradually restored and positioned, and the accuracy of positioning at the track of the sliding seat is limited. 
       SUMMARY OF THE INVENTION 
       [0006]    The primary purpose of the present invention is to provide a positioning peg structure of a single-pull reel having a top cover, a cord-rotating disc, a cord, a spiral spring, a bottom cover and a peg positioning structure characterized in that the cord is wound respectively within an upper and a lower box of the cord-rotating disc, and both the windings in the upper and the lower box are in opposite direction to provide a loosening and a tightening winding of the cord, the upper box position is for the pulling cord and the lower box position is for the ready-to-rotate cord and the positioning of the cord is restricted by the peg positioning structure; wherein the peg positioning structure comprises a peg and a spring and is pivotally mounted at a positioning shaft located at the outer side of the interior of the bottom cover and the rear side of the positioning structure is pulled to close by the spring to constantly maintain the peg to point at a right direction and is urged to swing in accordance with the track for multi-operation function at the bottom section of the cord disc to proceed alternately with loosening and tightening operation, and the track includes a first push-to-close section, a second push-to-close section, a steering section, an engaging slot and a slanting leading face multi operation structure, wherein the first push-to-close section is a protruded section within the track; when the cord-rotating disc restores to the steering direction, the peg is pushed to large angle in clockwise and the peg is fully disengaged from engagement mechanism; the second push-to-close section is positioned at the rear direction of the first push-to-close section, which again pushes the peg to a larger angle clockwise to disengage from engagement mechanism; the steering section is the recess section of the track, when the cord-rotating disc is at clockwise rotation, the peg is rotated and restored to engage at a corner position, awaiting an engagement mechanism in the course of a reverse rotating; the engaging slot is mounted at the rear direction of the first push-to-close section to allow the peg, after a rotation, to be engaged so as to position the reel; and the slanting leading face, which directs peg into the engaging slot layer or the push-to-close layer during the clockwise and anti-clockwise rotation of the cord-rotating disc to allow the peg to accurately position at the engaging or disengaging mechanism. 
         [0007]    Yet still another object of the present invention is to provide a positioning peg structure of a single-pull reel, wherein the positioning is trackless and disengagement of the cord will not be occurred. 
         [0008]    The advantages of the present invention are 
         [0009]    1. The apparatus provides a convenient mechanism in installation of cord or cables and the clean-up of cable after installation. 
         [0010]    2. The required length of the cord can be easily and precisely positioned after a specific length is pulled. 
         [0011]    3. Multiple positioning of cord is possible and high precision of length to be positioned can be achieved using the apparatus of the present invention. 
         [0012]    4. The apparatus provides a fast and easy operation such that the restoration of the cord can be obtained gradually or at one operation. 
         [0013]    5. The apparatus of the present invention overcomes the drawbacks due to wears and the gap formed by the steel bead and the sliding seat. 
         [0014]    6. The installation of the apparatus of the present invention is simple, fast and convenient, and the yield is thus increased. 
         [0015]    The foregoing object 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. 
         [0016]    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 
         [0017]      FIG. 1  is a perspective view of the preferred embodiment of the present invention. 
           [0018]      FIG. 2  is a perspective exploded view of the present invention. 
           [0019]      FIGS. 3-8  show schematically the structure of the track of the cord-rotating disc and the positioning structure in accordance with present invention. 
           [0020]      FIG. 9  is an exploded view of a conventional reel using the steel bead as positioning structure. 
           [0021]      FIG. 10  is a schematic view showing the bottom section of the sliding seat of the conventional reel using the steel bead as positioning structure. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0022]    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. 
         [0023]    Referring to  FIGS. 1 and 2 , there is shown a positioning peg structure of a single-pull reel comprising a top cover  1 , a spiral spring  2 , a cord  3 , a cord-rotating disc  4 , a bottom cover  5  and a peg positioning structure  6 . The center end of the spiral spring  2  is in engagement with the engaging slot  52  of the center shaft  51  within the interior of the bottom cover  5 . Further, the outer end of the spiral spring  2  is secured to the engaging slot  41  of the cord-rotating disc  4  by means of an edge hook  21 . When the cord-rotating disc  4  is rotated in clockwise or counter-clockwise, the spiral spring  2  at the interior is urged to be tightened or loosen. This provides the essential power source of rotating or restoration of the cord. 
         [0024]    The edge wall of the cord rotating disc  4  is provided with an engaging plate  42  which causes the cord  3  to surround the upper box of the cord-rotating disc  4 . When the cord  3  passes through the external edge of the lower box of the cord-rotating disc  4 , the cord  3  is divided into an upper and lower box position. The upper box is for the pulling cord  3  and the lower box is for the ready-to-rotate cord  3 . In accordance with the present invention, the characteristics are on the cord-rotating disc  4  and the peg positioning structure at the external side of the interior of the bottom cover  5 . As shown in  FIG. 2 , the peg positioning structure  6  comprises a peg  61  and a pulling spring  62 . The peg  61  is pivotally mounted to the positioning shaft  53  at the external side of the interior of the bottom cover  5 , and the pulling spring  62  is used for fastening such that the peg  61  is constantly pointing to the correct direction. 
         [0025]    As shown in  FIG. 3 , the bottom section of the cord-rotating disc  4  is provided with a multi-operation urging track  43 . The track  43  includes a first push to close section  431 , a second push to close section  431 - 1 , a steering section  432 , an engaging slot  433  and a slanting leading face  434 . As shown in  FIG. 3 , the peg  61  is at a large angle position and slanting upward and moving along the rotating direction will not generate an engaging operation. Thus, the peg  61  shown in the figure is being pulled. 
         [0026]    Referring to  FIG. 4 , when the reel is releasing, the spiral spring  2  restores to its power and the cord-rotating disc rotates in a counter clockwise direction. At this point of time, the peg  61  is directed to the engaging slot  433  such that a positioning is provided to the reel. The positioning is referring to the engagement of cord at a tangential angle, the positioning shaft  53  and the peg  61 . The peg  61  is fully engaged and swinging will not occur, and therefore, the positioning of the reel is achieved. 
         [0027]    As shown in  FIG. 6 , when disengagement from the peg  61  is to be obtained, the cord at the reel is pulled again, and the cord-rotating disc  4  rotates in counter clockwise direction, as compared to the urging track  43  and the peg  61 . The reverse rotating of the cord-rotating disc  4  causes the peg  61  to move along the slanting leading face  434  into the range of the push to close section  431  so as to quickly push the peg  61  to rotate, as shown in  FIG. 6 . After that, the second push to close section  431 - 1  causes the peg  61  to produce a large angle and moves into the range of the steering section  432 , as shown in  FIG. 7 . At this point of time, the reel is at a loosening state. Thus, the cord  3  can one time pulls back the cord  3  being pulled by means of the spiral spring. 
         [0028]    Referring to  FIG. 8 , the cord  3  is eventually reeling back or re-positioned. Before the cord  3  is positioned, the next pulling of the cord  3  will again rotate the cord-rotating disc  4  in a reverse direction. At this point of time, the peg  61  being restricted by the steering section  432  urging on the peg  61 , the peg  61  is at a state shown in  FIGS. 3 and 4 , awaiting the reverse rotating to cause an engagement at the engaging slot  433 . 
         [0029]    The ready-to-rotate cord  3  at the bottom box of the cord-rotating disc  4  is at a tightening state under a single directional pulling of the cord  3 , so as to respond to the required length of the rotation. On the other hand, when the cord  3  is restored to its original position, the ready-to-rotate cord at the bottom box is at a loosening position, thus, both of the operation are corresponding to each other. Thus, the reel under a single cord could achieve the function a single-pull cord, and will not affect the terminal or signal transmission point required by the ready-to-rotate cord end  31 . 
         [0030]    It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above. 
         [0031]    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.