The present invention relates to the field of zipper, and more particularly to a slider with a reboundable pull-tab.
Among the slider for slide fastener with an automatic stopper, locking member such as claw structure is a normal technical means to achieve the function of automatic rebound. Chinese application 103220932A discloses a slider for a slide fastener with an automatic stopper. Said slider for a slide fastener with an automatic stopper, the slider comprising: a body forming an element guide passage into which fastener elements are insertable; a locking member swingably supported in the body by a pin, and having a locking claw which is protrudable from a locking window hole formed in the body to the element guide passage; and an urging member configured to urge the locking member so that the locking claw protrudes from the locking window hole to the element guide passage, wherein a pair of lateral plate portions disposed at both end portions of the pin are respectively provided with crimping protrusions which are abuttable against end faces of the pin and which are arranged at peripheral portions of a through-hole of the pair of lateral plate portions, through which the pin penetrates. The technical solution disclosed by the Chinese patent has a very complicated structure and lots of components. While the slider disclosed by the present invention has a very simple structure and could automatically rebound even if the pull-tab is pulled more than 90 degrees, and is free from unrebounding due to over-rotation.
The present invention provides a slider with a reboundable pull-tab, the pull-tab automatically springs back to the original point when pulled up and released, even when it is over-rotated.
The present invention also provides a slider comprising a slider base, a pull-tab, a connecting shaft and a spring; the slider base comprises an upper blade, a lower blade, and a connecting pin connecting the upper blade and the lower blade; upper bladelateral sides are formed on two sides of the upper blade, which has two through-holes for mounting the connecting shaft, namely first through-hole and second through-hole; the upper blade also has a square-shaped notch for disposing the pull-tab; the square-shaped notch further comprises an arc-shaped notch, whose anterior-end connects to the sidewalls of the square-shaped notch and whose posterior-end connects to the bottom surface of the square-shaped notch; a locking through-hole is disposed at the joint portion between the square-shaped notch and the arc-shaped notch; the locking through-hole separates the arc-shaped notch into a first arc-shaped notch on the side of the first through-hole and a second arc-shaped notch on the side of the second through-hole; an anterior-end platform is disposed at a joint portion of the anterior-end of the first arc-shaped notch and the sidewalls of the square-shaped notch, and the posterior-end of the first arc-shaped notch connects to the bottom surface by a locking vertical plane; the posterior-end of the second arc-shaped notch connects to the bottom surface directly and the anterior-end connects to the sidewalls of square-shaped notch; the anterior-end platform has a lug boss at the second arc-shaped notch.
The pull-tab comprises a pull-tab body, whose top-end has a spring mounting part and a locking part, wherein the spring mounting part and the locking part are adjacent to each other; the spring mounting part has a cambered surface and the locking part has a locking cambered surface that is lower than the spring mounting part; the top-end of the pull-tab body also has a connecting shaft through-hole for assembling the connecting shaft so as to fix the pull-tab to the slider base; the spring mounting part has a spring mounting hole coaxially provided with the connecting shaft through-hole, and the radius of the spring mounting hole is larger than the radius of the connecting shaft through-hole; the lateral side of the pull-tab body has a spring fixing hole communicating with the spring mounting hole.
Two ends of the spring has a first extending end and a second extending end, wherein the first extending end has a corner; when the slider is assembled, the spring is fit in the spring mounting hole; wherein the corner is disposed at the joint portion between the lug boss and the second arc-shaped notch; the second extending end inserts into the spring fixing hole; when the slider is assembled, the spring is in a compressed state.
Preferably, an annular platform protruding towards the side of the second through-hole is disposed at the place where the medial side surface of the upper blade surrounds the first through-hole to prevent the pull-tab from deflecting to the first through-hole, thus avoiding the friction between the pull-tab body and the side surface of the slider base when rotating the pull-tab, which would cause impeded rotation.
Preferably, two ends of the connecting shaft has fixed ends, and the through-holes have arc openings to contain the fixed ends so that the fixed ends could further prevent the slider from loosening when the slider is assembled.
Preferably, the bottom surface of the joint portion between the locking part and the spring mounting part has a protruding locking head, which inserts into the locking through-hole to prevent the pull-tab from sliding when the pull-tab is laid flat.
Preferably, the connecting shaft is set as a cylinder, one end of which has gear-shaped fixed end, whose addendum circle diameter is larger than that of the first through-hole and the second through-hole; when the slider is assembled, the fixed end would be damaged and inserted into the connecting shaft through-hole, ensuring the fixing effect.
Preferably, the connecting shaft is set as a cylinder, whose top-end has a fixed end and the bottom is set as a hollow tubular shape, when the slider is assembled, the bottom is stamped and the hollow tubular shape is turned outward to form a lug structure, the external diameter of the lug structure is larger than the diameter of the connecting shaft through-hole, thus ensuring the assembling effect.
Preferably, the spring mounting hole has a sectorial sunken structure disposed at the direction opposite to the locking head, and the sectorial sunken structure is formed at the outer side of the spring mounting hole. The angle of the sectorial sunken structure is larger than 90°. When rotating the pull-tab, the sectorial sunken structure enables the pull-tab to keep away from the extending ends of the spring, ensuring the normal deformation of the spring. And during installation, the spring could be engaged onto the joint portion between the sectorial sunken structure and the spring mounting hole, which facilitates assembly.
Preferably, the spring mounting hole is set as conical platform-shape, the radius of the end with its inner side connected to the connecting shaft through-hole is smaller than that of the end with its outer side connected to the pull-tab body. The bottom of the spring fixing hole has the same design that the radius of the inner side is smaller than that of the outer side, which makes the mould release more convenient during the preparation process.
Preferably, the second extending end of the spring has a fixed bending angle disposed within the spring fixing hole to prevent the spring from falling off.
Preferably, the spring fixing hole connects to the spring mounting hole, and the extension direction thereof is identical to that of the second extending end of the spring, ensuring the second extending end of the spring inserting into the fixing hole more conveniently to prevent the spring from falling off.
Preferably, the joint portion of the second extending end of the spring and the ring part of the spring has a corner, and the extension direction of the spring fixing hole in the pull-tab is identical to that of the second extending end of the spring, ensuring the second extending end of the spring inserting into the pull-tab and preventing the spring from falling off.
Preferably, the first extending end of the spring, the second extending end of the spring and the ring part of the spring are tangent to each other, and the extending ends have corner and fixed bending angle respectively, and the corner and fixed bending angle are of the same size so that the springs are compatibly used and both extending ends could be inserted into the pull-tab body and slider base.
The present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which:
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.
The present invention discloses a slider, as shown in
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In one embodiment of the present invention, an annular platform 261 protruding towards one side of the second through-hole 272 is disposed at the place where the medial side surface of the upper blade 21 surrounds the first through-hole 271 to prevent the pull-tab 1 from deflecting to the first through-hole 271, thus avoiding the friction between the pull-tab body 12 and the side surface of the slider base 2 when rotating the pull-tab 1, which would cause impeded rotation.
In one embodiment of the present invention, two ends of the connecting shaft 3 has fixed ends, and the through-holes have arc openings to contain the fixed ends so that the fixed ends could further prevent the slider from easily loosening when the slider is assembled.
In one embodiment of the present invention, as shown in
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When the installation of the slider is completed, the spring is in a slightly torsionally deformed condition, pulling the pull-tab would lead to further torsional deformation of the second extending end of the spring; when the pull-tab is released, the pull-tab would recover to the normal state under the impetus of the spring.
When the pull-tab is rotated to the locking part and contacts the locking vertical plane of the slider base, it is unable to perform further rotation or movement. The limit angle of the pull-tab rotation could be adjusted by adjusting the angle of the locking vertical plane or the angle of the locking part. Due to the impetus of the spring, even the limit angle of the pull-tab rotation is very large, the failure to rebound due to over-rotation would never happen.
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. All the terms in the present invention is used for the sake of clarity and should not constitute or be considered to be a limitation to the invention. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
Number | Date | Country | Kind |
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201610325696.4 | May 2016 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2016/084876 | 6/4/2016 | WO | 00 |