CN220343798U - Pull tab, pull head and zipper - Google Patents

Abstract

The utility model discloses a pull tab, a pull tab provided with the pull tab and a zipper provided with the pull tab. The pull tab of the present utility model is for connecting to a slider body to form a slider of a slide fastener, the pull tab having a connecting portion for connecting the slider body, the connecting portion including a crotch portion and shaft portions connecting both ends of the crotch portion, the pull tab including a tab base and an elastic coating body formed to coat the tab base at a position of the crotch portion away from the shaft portions, at least one of inner sides facing each other in a width direction of the elastic coating body being provided with a convex portion.

Description

Pull tab, pull head and zipper

Technical Field

The utility model relates to the technical field of zippers, in particular to a pull tab, a pull tab with the pull tab and a zipper with the pull tab.

Background

Zippers are everywhere visible in our daily lives. The common existing sliders of zippers are divided into automatic sliders and semi-automatic sliders. The automatic pull head can release the stop structure only by pulling the pull piece, and the semi-automatic pull head can release the stop structure only when the pull piece stands up, so that the semi-automatic pull head generally has no misoperation, is safer than the automatic pull head, and is not easy to stab a user. However, since most of the automatic slider and the semiautomatic slider are different in structure, two types of production lines are required, which results in an increase in production cost.

Patent document CN206776888U as the prior art discloses a slider, most of which has the same structure as an automatic slider, but a tab of which includes a protrusion, and a cap includes a groove, and when a slide fastener is stopped, the protrusion and the groove are engaged with each other to prevent shaking, and the tab is not easily erected, thereby preventing a person from being pricked. It can be said that such a slider has the same structure as an automatic slider in most cases, but can function as a semiautomatic slider. From the aspect of production, the pull head capable of playing the function of the semi-automatic pull head can be produced under the condition of not changing the production line of the automatic pull head basically, so that the production cost of the pull head can be reduced.

As with most conventional slide fasteners, the tabs and caps of patent document CN206776888U are also made of metal, and the surfaces of the metal tabs and caps are generally coated or electroplated. In the use process of the zipper, the coating film or the electroplating film can be gradually reduced due to friction, so that the size of the bulge and the size in the groove are changed, the fit of the bulge and the groove is not tight, and the function of preventing shaking is weakened or vanished. In addition, peeling of the coating film or the plating film exposes the metal to easily cause corrosion, resulting in deterioration of the appearance. In addition, if the tab and the cap are both made of metal, the metal is hard to deform at the time of fitting, and thus the operation of fitting with each other becomes difficult. Further, since the tab having the projection is not a general shape, a dedicated production process is required, which increases the cost.

Disclosure of Invention

The present utility model has been made to solve the above-described problems, and an object thereof is to provide a slider, a slider provided with the same, and a slide fastener provided with the same, which can prevent dimensional changes due to coating or plating peeling, thereby improving the appearance of the slide fastener, facilitating the operation, and reducing the cost.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a pull tab for connecting to a slider body to form a slider of a slide fastener, the pull tab having a connecting portion for connecting the slider body, the connecting portion including a crotch portion and shaft portions connecting both ends of the crotch portion, characterized in that the pull tab includes a pull tab base and an elastic coating body formed to coat the pull tab base at a position of the crotch portion away from the shaft portions, at least one of inner sides facing each other in a width direction of the elastic coating body being provided with a convex portion.

In the pull tab of the present utility model, it is preferable that the pull tab has a front surface and a rear surface, and the projection is provided at a position offset from the rear surface in the thickness direction of the pull tab.

In the pull tab of the present utility model, it is preferable that the protruding height of the protruding portion becomes gradually larger in a direction from the rear surface toward the front surface to form a guide plane.

In the pull tab of the present utility model, preferably, the protruding portion has a first side surface near the back surface and a second side surface far from the back surface, wherein the first side surface is an arc surface smoothly connected with the guiding plane, and the second side surface is a plane.

In the pull tab of the present utility model, it is preferable that the convex portions are symmetrically provided on two of the inner side surfaces facing each other, and a side surface of the convex portion near the shaft portion is a concave curved surface.

In the pull tab of the present utility model, it is preferable that the convex portion extends between the front and back surfaces in the thickness direction of the elastic coating body.

In the pull tab of the present utility model, preferably, the pull tab base is an integrally molded piece, the shaft portion and the crotch portion enclose a closed hole, and the elastic coating body is integrally molded to cover the pull tab base.

In the pull tab of the present utility model, it is preferable that the elastic coating body protrudes from the surface of the pull tab substrate at each boundary position between the elastic coating body and the pull tab substrate.

In the pull tab of the present utility model, it is preferable that the pull tab substrate is provided with a recess in at least one of the front surface and the back surface at the coating position of the elastic coating body, and a part of the elastic coating body is filled into the recess.

The utility model also provides a slider of the zipper, which is characterized by comprising a slider body and the pull tab, wherein the pull tab is mounted to a pull tab mounting part of the slider body through the connecting part.

In the slider of the present utility model, preferably, when the convex portion in the slider is a convex portion provided to be biased toward the back surface of the slider, a groove is provided on at least one outer side surface of the slider mounting portion, the groove being capable of being fitted with the convex portion to fix the slider; when the convex portion in the pull tab is a convex portion whose side surface near the shaft portion is a concave curved surface, a form fit can be formed between the concave curved surface and two outer side surfaces of the pull tab mounting portion near the end portion to fix the pull tab. In the slider of the present utility model, it is preferable that the slider body defines a slider mounting space by the slider mounting portion for accommodating a shaft portion of the slider, the shaft portion being located at a central position of the slider mounting space in a pulling direction of the slider when the slider is fixed.

The utility model also provides a zipper, which is characterized by comprising the slider.

Effects of the utility model

In the slide fastener of the present utility model, since the protruding portion engaged with the groove is of a structure made of resin and having elasticity, the protruding portion and the groove are not easily changed in size due to friction, and the protruding portion and the groove can be kept in close engagement for a long period of time, so that the pull tab can be prevented from shaking for a long period of time.

In addition, the metallic tab substrate covered with the elastic coating body is free from corrosion caused by exposure of the metal, and can maintain the beautiful appearance for a long period of time.

Further, since the protruding portion has elasticity, it is easy to deform and to facilitate the engagement operation when engaging with the groove of the tab attachment portion.

In addition, because the side of the protruding portion, which is close to the shaft portion, is a concave curved surface, and the concave curved surface is matched with the appearance of the pull-tab mounting portion, the pull-tab can be firmly fixed by the concave curved surface, so that when the stop claw of the pull-tab is fixed, the shaft portion is positioned at the center of the pull-tab mounting space along the pulling direction of the pull-tab, the shaft portion does not apply an acting force to the stop claw, and the stop claw is not easy to move accidentally, thereby preventing the pull-tab from being pushed accidentally, and the zipper is not opened or closed arbitrarily.

Drawings

Fig. 1 (a) is a perspective view of a slider according to a first embodiment of the present utility model.

Fig. 1 (b) is an enlarged view of the structure in the rectangular frame of fig. 1 (a).

Fig. 2 (a) is a perspective view of a slider according to a first embodiment of the present utility model.

Fig. 2 (b) is an enlarged view of the structure in the rectangular frame of fig. 2 (a).

Fig. 3 is a perspective view of a tab according to a first embodiment of the present utility model in a sagged state.

Fig. 4 (a) is a perspective view of the pull tab of the first embodiment of the present utility model when placed horizontally.

Fig. 4 (b) is an A-A view of fig. 4 (a).

Fig. 5 is a perspective view of a tab substrate of the present utility model.

Fig. 6 (a) to 6 (d) are left, front, right and rear views of the tab substrate of the present utility model.

Fig. 7 (a) to 7 (d) are front, left, rear and right views of a pull tab according to a first embodiment of the present utility model.

Fig. 8 (a) is a front view of a pull tab of a second embodiment of the present utility model.

Fig. 8 (b) is a front view of an elastic coating body of a pull tab according to a second embodiment of the present utility model.

Fig. 9 (a) is a front view of a slider according to a second embodiment of the present utility model.

Fig. 9 (b) is a right side view of a slider according to a second embodiment of the present utility model.

Description of the reference numerals

1 pull head

2 pull tab

21 connection part

211 bifurcation part

212 shaft portion

22 handle portion

23 elastic coating body

231 boss

231a first side

231b second side

231c top surface

232 concave curved surface

24 pull tab substrate

241 concave portion

3 pull head body

31 pull tab mounting portion

32 pull tab installation space

33 inclined plane

Detailed Description

In the following description of the present utility model, the same reference numerals denote the same structures or equivalent structures in different embodiments.

(first embodiment)

First, the structure of a slider according to a first embodiment of the present utility model will be briefly described with reference to fig. 1 (a) to 2 (b). The slider 1 includes a slider 2 and a slider body 3. The pull tab 2 is connected to the slider body 3 to form the slider 1 of the slide fastener.

As shown in fig. 3, the pull tab 2 has a connecting portion 21 for connecting the slider body 3 and a grip portion 22 for a user to grip. The connecting portion 21 includes a bifurcated portion 211 and shaft portions 212 connecting both ends of the bifurcated portion 211. If the structure is described based on the material constituting the tab 2, as shown in fig. 4 (a) and 4 (b), the tab 2 includes an elastic coating 23 and a tab base 24 made of metal. The elastic coating body 23 is provided at a position of the crotch portion 211 away from the shaft portion 212, and is formed so as to cover the tab base 24.

As shown in fig. 1 (a) to 2 (b), 4 (a) and 4 (b), one protruding portion 231 is provided on each of the inner side surfaces of the elastic coating body 23 facing each other in the width direction W. Although the elastic coating body 23 is provided with two protrusions 231 facing each other in this embodiment, only one protrusion 231 may be formed on one inner side surface.

As shown in fig. 1 (a) and 2 (a), the slider 1 provided with the pull tab 2 has a pull tab attachment portion 31 provided in the slider body 3 of the slider 1. The slider 2 is connected to the slider mounting portion 31 by the connecting portion 21 to constitute the slider 1. A groove (not shown in the drawings) is provided on the widthwise outer side surface of the tab attaching portion 31. When the slider 1 is stopped and the tab 2 sags, the groove can engage with the boss 231 on the tab 2 to fix the tab 2. Thus, when the slider 1 is stopped, the pull tab 2 cannot swing at will, and the pull tab 2 can be prevented from being erected to hurt a person.

In the zipper of the utility model, the protruding part which is engaged with the groove has elasticity, so that the sizes of the protruding part and the groove are not easy to change due to friction with the groove, the close engagement of the protruding part and the groove can be kept for a long time, and the effect of preventing the pull tab from shaking can be realized for a long time.

In the present embodiment, the elastic coating body 23 is made of a resin having elasticity, but the present utility model is not limited thereto, and any material having a certain elasticity may be used as long as the protruding portion 231 can be engaged with the groove.

The slider 1 is also provided with a stop structure and a stop releasing structure, similarly to the conventional slider, in which the stop structure stops the slider when the slider 2 is fixed, and the stop of the slider is released when the slider 2 is pulled. These structures are substantially the same as those of the conventional automatic slider, and the illustration and detailed explanation thereof are omitted here.

In the embodiment, the tab attachment portion 31 is shown as a cap, but the present utility model is not limited to this, and may be a tab, not shown, integrally formed with the slider body 3. The nose of the slider has a known structure, and a description thereof will be omitted.

The pull tab 2 according to the first embodiment of the present utility model will be described in detail.

As shown in fig. 1 (b), 2 (b), 4 (a) and 4 (b), the boss 231 has a gradually changed boss height, specifically, the boss height of the boss 231 gradually becomes larger in a direction from the rear surface to the front surface of the pull tab 2, so that the top surface 231c of the boss 231 forms a guide plane. When the boss 231 is engaged with the groove of the tab mounting portion, the guide plane formed by the top surface 231c plays a guiding role, so that the engagement of the boss 231 with the groove becomes smooth. The front surface of the tab 2 is a surface facing outward of the tab 2 when the shaft portion 212 of the tab 2 is located on the slider advancing direction side at the time of pulling the slide fastener with respect to the other end of the tab 2, and the opposite surface is a back surface.

The boss 231 has a first side 231a close to the back surface of the tab 2 and a second side 231b far from the back surface, the first side 231a being a curved surface smoothly connected to the top surface 231c to serve as a guide surface when the boss 231 engages with the groove, and the second side 231b being a flat surface to serve as an engagement surface when the boss 231 engages with the groove.

As described above, since the boss 231 has the first side 231a, the second side 231b, and the top 231c, when the slider is stopped and the boss 231 is to be engaged into the groove, only a small force is required to engage the boss 231 into the groove, and the boss 231 can be relatively reliably engaged into the groove.

In the conventional slider, the groove provided in the tab attachment portion 31 is generally provided for fixing the tab attachment portion 31, i.e., the cap, to the slider 1, and is therefore generally located at a position of the tab attachment portion 31 close to the slider body. In order to enable the boss 231 to be engaged with the groove when the slider 1 is stopped, the boss 231 is preferably provided at a position close to the rear surface of the tab 2, that is, at a position corresponding to the groove when the tab 2 sags.

As shown in fig. 5 and fig. 6 (a) to 6 (d), the tab base 24 has a concave portion 241 at the coating position of the elastic coating body 23. In this embodiment, the concave portion 241 is provided on the back surface of the tab substrate 24, but the present utility model is not limited thereto. The concave portion 241 may be provided on the front surface of the tab base 24, on the rear surface of the tab base 24, or both the front surface and the rear surface may be provided with the concave portion 241. A part of the elastic coating body 23 is filled into the concave portion 241. By providing the concave portion 241 in the tab base 24, the elastic coating body 23 can be firmly coated, and the elastic coating body 23 can be prevented from being displaced, and the elastic coating body 23 can be prevented from falling off from the tab base 24. Of course, the concave portion 241 may not be provided.

For ease of production and cost reduction, the tab substrate 24 of the present utility model is provided as an integrally formed piece. As shown in fig. 5, the shaft portion 212 and the crotch portion 211 are surrounded to form a closed hole, and the elastic coating portion 23 is integrally molded by injection molding to cover the tab base 24 in the recess portion 241. Since the metal tab base 24 is covered with the elastic coating, corrosion due to exposure of metal is not caused, and the appearance of the slider can be maintained for a long period of time.

As shown in fig. 7 (a) to 7 (b), the elastic coating body 23 needs to have a certain thickness in order to secure the strength of the elastic coating body 23. The structure is such that the elastic coating 23 protrudes from the surface of the tab substrate 24 at each boundary position between the elastic coating 23 and the tab substrate 24.

(second embodiment)

Next, a slider according to a second embodiment of the present utility model will be described with reference to fig. 8 (a) to 9 (b). The slider 1 of the second embodiment also includes a pull tab 2 and a slider body 3. This second embodiment differs from the first embodiment in the specific shape of the elastic coating 23 in the pull tab 2.

In the tab 2 of the first embodiment, as shown in fig. 1 (b) and 2 (b), the protruding portion 231 of the elastic coating body 23 has a first side 231a, a second side 231b, and a top 231c, the first side 231a being a curved surface smoothly connected to the top 231c to serve as a guide surface when the protruding portion 231 engages with the groove of the tab mounting portion, and the second side 231b being a flat surface to serve as an engagement surface after the protruding portion 231 engages with the groove of the tab mounting portion.

In contrast, as shown in fig. 8 (a) and 8 (b), the protruding portion 231 is also formed in the elastic coating body 23 of the pull tab 2 of the second embodiment, but the protruding portion 231 in the second embodiment does not have the side surface and the top surface as in the first embodiment. The convex portions 231 of the second embodiment are symmetrically provided on two of the inner side surfaces of the elastic coating body 23 facing each other in the width direction, the side surfaces thereof close to the shaft portion 212 are concave curved surfaces 232, and the convex portions 231 extend between the front and back surfaces along the thickness direction of the elastic coating body 23.

The concave curved surface 232 is formed so as to match the convex chamfer arcs of the two outer sides of the tab mounting portion 31 at the near end portions, as shown in part a of fig. 9 (a). Referring to fig. 9 (a) and 9 (b), since the concave curved surface 232 matches the outer shape of the tab attaching portion 31, the concave curved surface 232 relatively firmly wraps the convex arc-shaped chamfers of the two outer side surfaces of the tab attaching portion 31 near the end portions. Thus, when the stopping claw of the slider 1 is fixed so that the shaft portion 212 is at the center position of the slider mounting space 32 in the pulling direction of the slider, the shaft portion 212 does not easily move along the inclined surfaces 33 on both sides to apply a force to the stopping claw, which does not easily cause the stopping claw to be accidentally moved, thereby preventing the slider from being accidentally pushed, and the slide fastener from being arbitrarily opened and closed. Only when the pull tab 2 is pulled up by a person, the shaft portion 212 applies a pulling force to the stop pawl, and the pull tab 2 and thus the slide fastener can be opened and closed.

The present utility model also provides a slide fastener comprising the slider of the first embodiment or the second embodiment described above. The slide fastener of the present utility model has the same structure as the conventional slide fastener except for the pull tab, and a detailed description of the structure is omitted here.

When the slide fastener of the present utility model includes the slider of the first embodiment, the slider includes the protrusion 231 having the first side 231a, the second side 231b and the top 231c, and the slider includes the groove, and when the slide fastener is stopped, the protrusion and the groove cooperate with each other to prevent shaking, and the slider is not easily erected, so that the pricking of a person can be prevented.

When the slide fastener of the present utility model includes the slider of the second embodiment, the slider thereof includes the convex portion 231 having the concave curved surface. As described above, the concave curved surface 232 relatively firmly wraps the convex arc-shaped chamfers of the both outer sides of the tab mounting portion 31 near the end portions. Thus, when the shaft portion 212 is positioned at the center of the slider mounting space 32 in the pulling direction of the slider, the force is not easily applied to the stop pawl by moving along the inclined surfaces 33 on both sides, and the stop pawl is not easily caused to be accidentally moved, so that the slider can be prevented from being accidentally pushed, and the slide fastener is not arbitrarily opened and closed.

In addition, the structure of the pull tab substrate and the pull tab of the pull tab is the same as that of the automatic pull tab, but the pull tab substrate and the pull tab can play the function of the semi-automatic pull tab, and in terms of production, the pull tab and the pull tab which can play the function of the semi-automatic pull tab can be produced under the condition that the production line of the automatic pull tab and the pull tab is not changed, so that the production cost of the pull tab can be reduced. Further, since the slide fastener has the elastic coating body, corrosion due to exposure of metal is less likely to occur, and the appearance can be maintained for a long period of time.

It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the utility model, are intended to be included within the scope of the appended claims.

Claims (14)

1. A slider for connecting to a slider body to form a slide fastener, the slider having a connecting portion for connecting to the slider body, the connecting portion including a bifurcated portion and shaft portions connecting both ends of the bifurcated portion, characterized in that,

the pull tab comprises a pull tab substrate and an elastic coating body,

the elastic coating body is formed to coat the tab base body at a position of the crotch portion away from the shaft portion,

at least one of inner side surfaces of the elastic coating body facing each other in the width direction is provided with a convex portion.

2. A pull tab according to claim 1, wherein,

the pull tab has a front side and a back side,

the protruding portion is provided at a position offset from the back surface in the thickness direction of the pull tab.

3. A pull tab according to claim 2, wherein,

the protruding height of the protruding portion gradually becomes larger in a direction from the rear face toward the front face to form a guide plane.

4. A pull tab according to claim 3, wherein,

the protruding portion is provided with a first side face close to the back face and a second side face far away from the back face, wherein the first side face is an arc face smoothly connected with the guiding plane, and the second side face is a plane.

5. A pull tab according to claim 1, wherein,

the convex portions are symmetrically provided on two of the inner side surfaces facing each other, and a side surface of the convex portion near the shaft portion is a concave curved surface.

6. A pull tab as recited in claim 5, wherein,

the protruding portion extends between the front and back surfaces along the thickness direction of the elastic coating body.

7. The pull tab of any one of claims 1-6, wherein,

the pull tab matrix is an integrated part, the shaft part and the bifurcation part are enclosed to form a closed hole part, and the elastic coating body coats the pull tab matrix in an injection molding integrated mode.

8. The pull tab of any one of claims 1-6, wherein,

and at each junction position of the elastic coating body and the pull tab substrate, the elastic coating body protrudes out of the surface of the pull tab substrate.

9. The pull tab of any one of claims 1-6, wherein,

the tab substrate is provided with a concave portion on at least one of the front surface and the back surface of the tab substrate at the coating position of the elastic coating body, and a part of the elastic coating body is filled in the concave portion.

10. A slider of a slide fastener, the slider comprises a slider body and a pull tab, characterized in that,

the pull tab of any one of claims 1-9,

the pull tab is mounted to the pull tab mounting portion of the slider body through the connecting portion.

11. A slider as recited in claim 10, wherein,

when the pull tab is a pull tab according to any one of claims 2 to 4, at least one outer side surface of the pull tab mounting portion is provided with a groove which can be fitted with the protruding portion to fix the pull tab.

12. A slider as recited in claim 10, wherein,

when the pull tab is the pull tab of claim 5 or 6, a form fit can be formed between the concave curved surface and the two outer side surfaces of the pull tab mounting portion near the end portion to fix the pull tab.

13. A slider as claimed in claim 11 or 12, wherein,

the pull head body defines a pull-tab installation space through the pull-tab installation part for accommodating the shaft part of the pull tab,

when the pull tab is fixed, the shaft portion is located at a center position of the pull tab installation space in a pulling direction of the pull tab.

14. A slide fastener is characterized in that,

comprising a slider as claimed in any one of claims 10-13.