Structure of a single-pull reel

A single-pull reel which includes a bottom cover having a center axle, a top cover engageable with the bottom cover; a cord-rotating disc having a top portion provided with a circular flange which is divided into a plurality of sections by a plurality of slots, a clamping member being provided behind one of the sections to form a passage therebetween and having a plurality of serrated teeth at an inner side against the one of the sections, the bottom portion being provided with a multi-operation urging track, a spiral spring having an inner end engaged with a notch of the axle and an outer end bent into a hook to engage with one of the sections of the cord-rotating disc, a cord, and a peg positioning structure comprising a peg and a pulling spring.

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention is related to an improvement in the structure of a single-pull reel.

(b) Description of the Prior Art

FIGS. 12 and 13show a conventional reel A10employing a steel bead as the positioning structure. The reel A10comprises a front cover A1, a spiral spring A2, a sliding seat A3, a transmission line A4, a steel bead A5and a rear cover A6. In this conventional reel, the spring A2is used to restore the transmission line A4and a steel bead positioning structure is used. A multiple steel bead track A31is provided at the bottom section of the sliding seat A3to allow the steel bead A5to roll along the track A31and 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.

Another drawback is that the friction of the track31or the gap formed is too large, this will cause the engagement being not possible. Thus, such conventional structure A10is 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

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.

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.

The advantages of the present invention are

1. The apparatus provides a convenient mechanism in installation of cord or cables and the clean-up of cable after installation.

2. The required length of the cord can be easily and precisely positioned after a specific length is pulled.

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.

4. The apparatus provides a fast and easy operation such that the restoration of the cord can be obtained gradually or at one operation.

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.

6. The installation of the apparatus of the present invention is simple, fast and convenient, and the yield is thus increased.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIGS. 1,2and3, the single-pull reel according to the present invention generally comprises a top cover1, a spiral spring2, a cord3, a cord-rotating disc4, a bottom cover5and a peg positioning structure6. The bottom cover5is provided at the center with an axle51which has a notch52at the top end. The top cover1is configured to engage with the bottom cover5. The inner end of the spiral spring2is in engagement with the engaging slot52of the axle51within the interior of the bottom cover5. The cord-rotating disc4is provided at the top portion with a circular flange49which is divided into a plurality of sections48by a plurality of slots41. A clamping member42is provided on the top portion of cord-rotating disc4behind a section48to form a passage therebetween and has a plurality of serrated teeth422at the inner side against the section48. The outer end of the spiral spring2is bent into a hook21to engage with one of the sections48. When the cord-rotating disc4is rotated in clockwise or counter-clockwise direction, the spiral spring2will be tightened or loosened. The cord3is provided with an enlarged block30which divides the cord3into a first section31and a second section32. The enlarged block30has a plurality of serrated teeth301engaged with the serrated teeth422of the clamping member42, so that once the enlarged block30of the cord3is pushed to engage with the clamping member42in assembly, the enlarged block30cannot be pulled out of the clamping member42. The first section31of the cord3is wound around the circular flange49of the cord-rotating disc4. Referring toFIGS. 2 and 5, the second section32of the cord3extends out of the hole421of the cord-rotating disc4from the top portion to the bottom portion to connect with any desired connector (not shown).

Referring toFIGS. 2 and 6, the peg positioning structure6comprises a peg61and a pulling spring62. The peg61is pivotally mounted on a shaft53arranged on the bottom cover5. The pulling spring62has an end fixed to a pin69arranged on the bottom cover5and the other end connected to an end of the peg61thereby forcing the peg61to point to a desired direction.

Referring toFIGS. 5 and 6, the bottom portion of the cord-rotating disc4is provided with a multi-operation urging track43. The track43includes a first push-to-close section431, a second push-to-close section4311, a steering section432, an engaging slot433and a slanting leading face434. As shown inFIG. 6, the peg61is slanting upward and so when the first section31of the cord3is pulled along the direction shown inFIG. 6, there will be no engaging operation.

Referring toFIG. 7, when the first section31of the cord3is released, the restoration force of the spiral spring2will cause the cord-rotating disc4to rotate in a reverse direction and the peg61will be directed to the engaging slot433of the track43thereby stopping the cord-rotating disc4to rotate further. The peg61is directed at a tangential angle to the track43and so the peg61is fully engaged and swinging will not occur thereby achieving the purpose of positioning of the reel.

As shown inFIG. 8, when desired to release the peg61, it is only necessary to pull the first section31of the cord3to rotate the cord-rotating disc4in counterclockwise direction. The reverse rotating of the cord-rotating disc4causes the peg61to move along the slanting leading face434into the range of the push-to-close section431so as to quickly push the peg61to rotate, as shown inFIG. 9. After that, the second push-to-close section4311causes the peg61to produce a large angle and moves into the range of the steering section432, as shown inFIG. 10. At this point of time, the reel is at a loosening state. Thus, the cord3can one time pulls back the cord3by means of the restoring force of the spiral spring2.

Referring toFIG. 11, the cord3is eventually reeling back or re-positioned. Before the cord3is positioned, the next pulling of the cord3will again rotate the cord-rotating disc4in a reverse direction. At this point of time, the peg61being restricted by the steering section432urging on the peg61, the peg61is at a state shown inFIGS. 6 and 7, awaiting the reverse rotating to cause an engagement at the engaging slot433.

The second section32of the cord3at the bottom portion of the cord-rotating disc4is at a tightening state under a single directional pulling of the cord3, so as to respond to the required length of the rotation. On the other hand, when the cord3is restored to its original position, the second section32of the cord3at the bottom portion of the cord-rotating disc4is 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 of a single-pull cord, and will not affect the terminal or signal transmission point required by the second section32of the cord3.