CN106954919B

CN106954919B - Improvement of lower cover plate structure of double-layer tooth pull head

Info

Publication number: CN106954919B
Application number: CN201710121792.1A
Authority: CN
Inventors: 王联洲
Original assignee: Genmore Zipper Corp
Current assignee: Genmore Zipper Corp
Priority date: 2017-03-02
Filing date: 2017-03-02
Publication date: 2020-03-27
Anticipated expiration: 2037-03-02
Also published as: CN106954919A

Abstract

The invention discloses an improvement of a lower cover plate structure of a double-layer tooth pull head. Aims to provide an improvement of a lower cover plate structure of a double-layer tooth puller, which has good anti-theft performance and long service life and can be easily opened and closed when the puller turns. The zipper head is used for opening and closing an upper layer and a lower layer of double-layer chain belts with the same specification, and comprises an upper cover plate and a lower cover plate, wherein an upper side protection plate and a lower side protection plate are respectively arranged on two sides of the upper cover plate and the lower cover plate, the distance between the left upper side protection plate and the right upper side protection plate are the same as the distance between the left lower side protection plate and the right lower side protection plate are connected through a base center between the upper cover plate and the lower cover plate, and a separation guide sheet for separating the upper layer of chain belts and the lower layer of chain belts is designed on the base center. The invention can avoid or reduce the obstruction caused by the tension of the case passing through the bend and the covered wrinkles, and the pull head is easy to open and close when being pulled.

Description

Improvement of lower cover plate structure of double-layer tooth pull head

Technical Field

The invention relates to a zipper, in particular to an improvement of a lower cover plate structure of a double-layer tooth pull head.

Background

The size and shape of the upper and lower cover plates of a common double-layer tooth zipper are the same, the shape is that the width entering the tooth combining position is larger than that of the tooth combining position, the width difference of the front end and the rear end is obvious, only the upper side guard plates on two sides of the upper cover plate are arranged on the lower surface of the upper cover plate, the lower side guard plates on two sides of the lower cover plate are arranged on the upper surface of the lower cover plate, the positions of the upper and lower side guard plates are vertically corresponding, and the lengths are equal, as shown in fig. 1 to 3. The outer layer of the zipper is larger than the inner layer of the zipper in curvature when the zipper is turned up and down, and particularly, the difference of the curvatures of the inner layer and the outer layer is larger at a 90-degree turning position of a box body which is combined left and right on a case, so that the outer layer of the teeth are in a state of being expanded from teeth to teeth at the turning position, and the inner layer of the teeth are in a state of being squeezed from each other in an inward contracting manner. When the upper layer and the lower layer are formed to be combined with the same-cavity puller, the combined teeth of the puller are prevented from sliding due to the fact that time and form space of the upper layer and the lower layer are not coordinated when the upper layer and the lower layer are combined with the teeth. The combined tooth sliding resistance of the puller is increased, and the phenomena of rapid abrasion of the upper and lower guard plates and the seam bundle, opening of the upper and lower guard plates, bending of the base core or tearing of the pulling piece and the like are caused at the same time, so that the puller and the chain belt are damaged too early. Therefore, the patent No. ZL201410007719.8 is designed into a slider of a double-layer tooth zipper. The structure that the lower cover plate is corresponding to the upper cover plate and is retracted by the thickness of one layer of teeth is adopted, so that the resistance of the double-layer teeth at the bending position when the bending angle is pulled and slid is improved. Compared with the traditional puller, the puller has many advantages, but when the case and bag customers sew the zipper on the hard case shell or the soft case elastic iron frame covering fabric, when the puller passes through a bend, the action is rotated during sewing the bend, and the phenomenon usually causes the zipper to rotate to tightly pull down the sewing, so that the zipper of the case and bag passing through the bend is particularly tightly attached to the shell or the iron frame of the covering fabric. The tight-pulled corner part is multi-wave and uneven due to the inner cloth folds, so when the zipper head slides through the corner, the widest part of the lower cover plate of the zipper head touches the sewed inner cloth folds (with inconsistent thickness and unevenness), and the bending section is just the position of the over-bending tension state, so the resistance for pulling the zipper head at the position is the maximum. The pull tab must be held up and then pulled to slide smoothly. Therefore, the zipper and the puller are always qualified and normal, but once the zipper is sewn on the case, the zipper and the puller become good or bad, the quality is unstable, and the quality disputes between suppliers and customers are continuous.

Disclosure of Invention

The invention aims to provide an improvement of a lower cover plate structure of a double-layer tooth pull head, which has good anti-theft performance and long service life and can be easily opened and closed when the pull head turns.

In order to meet the requirements, the technical scheme of the improved structure of the lower cover plate of the double-layer tooth pull head is as follows: the zipper head is used for opening and closing an upper layer and a lower layer of double-layer chain belts with the same specification, and comprises an upper cover plate and a lower cover plate, wherein an upper side protection plate and a lower side protection plate are respectively arranged on two sides of the upper cover plate and the lower cover plate, the distance between the left upper side protection plate and the right upper side protection plate are the same as the distance between the left lower side protection plate and the right lower side protection plate are connected through a base center between the upper cover plate and the lower cover plate, and a separation guide sheet for separating the upper layer of chain belts and the lower layer of chain belts is designed on the base center.

The maximum width of the lower cover plate is 70% -80% of the maximum width of the upper cover plate.

The length of the lower side guard plate is 50% -80% of the length of the upper side guard plate.

The width of the separation guide vane is smaller than that of the base core.

The shape of separating guide vane is isosceles triangle or isosceles trapezoid.

According to the improvement of the double-layer tooth pull head lower cover plate structure designed by the scheme, the maximum width of the lower cover plate at the opening end close to the base center is reduced, the purposes of reducing the defects that the lower cover plate passes through small passage and large blocking force caused by the defects that the bag passes through an N-shaped plastic strip at a bent part or the folded surface fabric and lining fabric at a covered edge, and the folded zipper cloth belt is tensioned and attached to the N-shaped strip, or the folded surface fabric and lining fabric covered by the surface fabric and the like are wrapped and sewed, and the thickness is uneven are achieved, and the blocking resistance of the pull head passing through the bag at. The slider structure is used on a double-layer zipper, although the lower cover plate and the lower side guard plate are respectively subjected to the improvement treatment of narrowing and shortening, in use, the zipper belt of the upper layer teeth passes through the teeth combination in the upper cavity formed by the upper cover plate, the upper side guard plate and the tongue-shaped guide piece which are not changed, so that the left zipper belt and the right zipper belt of the upper layer teeth can normally combine the teeth; for the combined teeth of the left and right chain belts of the lower layer teeth, the left and right chain belts of the lower layer teeth are smoothly engaged under the driving and guiding of the combined teeth of the left and right chain belts of the upper layer teeth. Such structural design has reduced the width of apron widest department under the pull head, can avoid or reduce the above-mentioned case and bag and cross the taut and the hindrance that the wrapped fold caused of bight, opens and shuts easily when making the pulling pull head, avoids simultaneously through pulling the wearing and tearing of smooth back strap many times.

Drawings

FIG. 1 is a front view of a slider of a conventional double-tooth slide fastener;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a cross-sectional view C-C of FIG. 1;

FIG. 4 is a front view of the present invention;

FIG. 5 is a right side view of FIG. 4;

FIG. 6 is a cross-sectional view A-A of FIG. 4;

FIG. 7 is a sectional view taken along line B-B of FIG. 4;

fig. 8 is a bottom view of the upper cover plate and the lower cover plate in an overlapped state.

In the figure: 1. an upper cover plate; 2. a lower cover plate; 3. an upper side guard plate; 4. a lower side guard plate; 5. a basal core; 6. the guide vanes are separated.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Fig. 4 to 8 are schematic structural views of a modified structure of a lower cover plate of a double-layer tooth slider. As seen from the figure, the zipper puller is used for opening and closing the upper and lower layers of double-layer zipper belts with the same specification, namely the upper and lower layers of zipper teeth on the double-layer zipper belts have the same width. The pull head comprises an upper cover plate 1 and a lower cover plate 2, wherein an upper side guard plate 3 and a lower side guard plate 4 are respectively arranged on two sides of the upper cover plate 1 and the lower cover plate 2, and the distance S1 between the engaging ends of the left lower side guard plate 4 and the right lower side guard plate 4 is the same as the distance S2 between the engaging ends of the left upper side guard plate 3 and the right upper side guard plate 3. The upper cover plate 1 and the lower cover plate 2 are connected through a base 5. The middle part of the base core 5 is provided with a separation guide sheet 6 which separates the upper and lower layers of chain belts, the width of the separation guide sheet 6 is less than that of the base core, and the separation guide sheet is in the shape of an isosceles triangle or an isosceles trapezoid. The maximum width W1 of the lower cover 2 is smaller than the maximum width W2 of the upper cover 1, and generally the maximum width W1 of the lower cover 2 is 70-80% of the maximum width W2 of the upper cover 1, and the rear end of the lower cover 2 is tapered. The length L1 of the lower protector 4 is shorter than the length L2 of the upper protector 3, and the length L1 of the lower protector 4 is usually 50% to 80% of the length L2 of the upper protector 3.

Claims

1. The improvement of apron structure under double-deck tooth pull head, it is the pull head that is used for opening and shutting two-layer double-deck chain belt with the specification about, this pull head is including upper cover plate and lower apron, it does not is equipped with upside backplate and downside backplate to divide equally in the both sides of upper cover plate and lower apron, it is the same with the distance between the lower side backplate closes the tooth end about to control the distance between the upside backplate, connect through the basic center between upper cover plate and lower apron, the design has the separated guide vane with upper and lower two-layer chain belt separately on the basic center, characterized by is that the maximum width of apron is less than the maximum width of upper cover plate down, the length of downside backplate is shorter than the length of upside backplate, the shape of lower apron rear end.

2. The improvement of the lower cover plate structure of the double-layer tooth pull head as claimed in claim 1, wherein the maximum width of the lower cover plate is 70% -80% of the maximum width of the upper cover plate.

3. The improvement of the lower cover plate structure of the double-layer tooth slider as claimed in claim 1, wherein the length of the lower side guard plate is 50% -80% of the length of the upper side guard plate.

4. The improvement of the lower cover plate structure of the double-layer tooth slider as claimed in claim 1, wherein the width of the separation guide piece is smaller than the width of the base core.

5. The improvement of the lower cover plate structure of the double-layer tooth pull head as claimed in claim 1 or 4, wherein the shape of the separation guide piece is isosceles triangle or isosceles trapezoid.