FASTENER PULL TAB WITH DETACHABLE PULL TAB ASSISTANT AND FASTENER SLIDER

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority under 35 USC §119 from Chinese Utility Model Application No. 202423321616.7 filed on December 31, 2024, the contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the technical field of fasteners, in particular to a fastener pull tab with a detachable pull tab assistant and a fastener slider assembled with the fastener pull tab.

BACKGROUND

At present, fasteners are widely used in daily necessities such as clothes, bags, tents, and bedding, and are used to combine or separate items.

In general, a fastener mainly includes a pair of cloth tapes, fastener stringers respectively fixed on inner edges of the cloth tapes, and a slider. The slider includes a slider body attached to the fastener stringers, and a pull tab attached to a surface of the slider body. By holding the pull tab and pulling the slider body along a length direction of the fastener, the pair of fastener stringers are engaged or separated, and the fastener is correspondingly closed or opened. In order to enhance a designability of the fastener, each of some fasteners in the related art is additionally provided with a pull tab assistant. The pull tab assistant is detachably attached to the pull tab of the fastener slider, and the pull tab assistant can not only improve convenience of pulling the slider, but also enrich the designability of the fastener.

In the related art, in a fastener pull tab disclosed in Chinese invention patent with a registration number of CN110811084B, when a pull tab assistant is attached, a pull tab assist portion of the pull tab assistant is passed through an attachment hole on a pull tab body, and then a neck portion at one end of an end portion of the pull tab assist portion is held in the attachment hole of the pull tab body by limiting a head portion. This makes the attachment of the pull tab assistant easier. However, the pull tab assist portion needs to pass through the attachment hole at the time of attachment, and another end, away from the neck portion, of the pull tab assist portion is a holding portion. As a result, a shape of the holding portion is limited by the attachment hole on the pull tab body, which makes it difficult to design the holding portion to have a richer appearance, and thus the appearance of the pull tab assistant is limited.

In view of the above problems, a fastener pull tab with a rotatably detachable pull tab assistant is proposed. In the fastener pull tab, an attachment hole is formed in a metal pull tab body, an assistant column portion and an elastically deformable assistant head portion are arranged at one end of the pull tab assistant, the attachment hole and the assistant head portion are both rectangular extending along a width direction of the fastener pull tab, and the assistant column portion is rotatably accommodated in the attachment hole. When the pull tab assistant is attached, the pull tab assistant is first placed in a horizontal state consistent with the width direction of the fastener pull tab, and at this time, a length direction of the assistant head portion is consistent with a length direction of the attachment hole. The assistant head portion can pass through the attachment hole by pressing the assistant head portion, and the assistant column portion is accommodated in the attachment hole. Then, the pull tab assistant is rotated downward by 90° such that the pull tab assistant is in a vertical state consistent with a length direction of the fastener pull tab, and at this time, the length direction of the assistant head portion is perpendicular to the length direction of the attachment hole, that is, the assistant head portion and the attachment hole intersect to form a cross shape. A part of the assistant head portion abuts against a surface of the pull tab body, thereby limiting the assistant head portion from being reversely disengaged from the attachment hole. A detachment step for the pull tab assistant is the opposite of the attachment step.

However, the fastener pull tab with the rotatably detachable pull tab assistant still has the following disadvantages. 1. when the pull tab assistant is in the vertical state after attachment, a large gap exists between the assistant column portion and a hole wall of the attachment hole in the width direction of the fastener pull tab. Therefore, a fastening degree between the pull tab assistant and the pull tab body is insufficient, and the pull tab assistant is easy to shake in this direction, and thus the state of the pull tab assistant after the attachment cannot be stably maintained. 2. In order to prevent shaking of the pull tab assistant after attachment, each of some fastener pull tabs is provided with a protruding portion on a back surface of the pull tab body, and the protruding portion abuts against an outer peripheral side of the pull tab assistant in a vertical state, which limits the shaking of the pull tab assistant. However, the provision of the protruding portion makes the pull tab body less beautiful.

In view of the above disadvantages in the related art, the technical problem to be solved by the present invention is to provide a fastener pull tab with a detachable pull tab assistant, which can not only make fastening between the pull tab assistant and a pull tab body reliable after attachment, but also improve aesthetic appearance of the pull tab body.

SUMMARY

According to one aspect of the present invention, there is provided a fastener pull tab with a detachable pull tab assistant, the fastener pull tab including: a pull tab body; and the pull tab assistant. The pull tab body includes an attachment hole penetrating through the pull tab body, an assistant attachment portion on a periphery of the attachment hole, and a limiting groove penetrating through the assistant attachment portion, the limiting groove is at a hole wall of the attachment hole and communicates with the attachment hole, and the attachment hole has different hole diameters in at least two intersecting directions. The pull tab assistant includes an assistant body, an assistant column portion extending from the assistant body, an assistant head portion provided at an outer end of the assistant column portion along an extension direction of the assistant column portion, and a limiting protrusion protruding from an outer periphery of the assistant column portion, the limiting protrusion is between the assistant body and the assistant head portion, the assistant head portion has different lengths in at least two intersecting directions, and the assistant column portion is rotatably accommodated in the attachment hole. The pull tab assistant is rotatable between an insertion-removal position and a retention position relative to the pull tab body. When the pull tab assistant is in the insertion-removal position, a length direction of the assistant head portion is consistent with a length direction of the attachment hole, and the attachment hole allows the assistant head portion to pass therethrough. When the pull tab assistant is in the retention position, the length direction of the assistant head portion intersects the length direction of the attachment hole, the assistant body and the assistant head portion respectively abut against two sides of the assistant attachment portion, the limiting protrusion is accommodated in the limiting groove, and an outer peripheral surface of the limiting protrusion abuts against and is engaged with a groove wall surface of the limiting groove.

Preferably, the attachment hole is an oblong hole or a rectangular hole, the length direction of the attachment hole is consistent with a width direction of the pull tab body, a width direction of the attachment hole is consistent with a length direction of the pull tab body, and the attachment hole penetrates through the pull tab body along a thickness direction of the pull tab body. The hole wall of the attachment hole includes a pair of transverse hole walls facing each other along the length direction of the pull tab body, and the limiting groove is provided at an intermediate position of one of the transverse hole walls. When the pull tab assistant is in the insertion-removal position, the length direction of the assistant head portion is consistent with the width direction of the pull tab body. When the pull tab assistant is in the retention position, the length direction of the assistant head portion is consistent with the length direction of the pull tab body.

Preferably, a length direction of the assistant body is consistent with the length direction of the assistant head portion. Both ends of the assistant head portion along the length direction of the assistant head portion are respectively provided with longitudinal protrusions extending outward with respect to the assistant column portion, and the limiting protrusion is between the assistant body and one of the longitudinal protrusions. When the pull tab assistant is in the retention position, the longitudinal protrusions abut against a surface of the assistant attachment portion.

Preferably, when the pull tab assistant is attached, an insertion direction in which the assistant head portion is inserted into the attachment hole is a direction from a front surface to a back surface of the pull tab body. Along a length direction of the pull tab body, a back surface of the assistant attachment portion in the pull tab body is provided with, on both sides of the attachment hole, accommodating grooves communicating with the attachment hole. When the pull tab assistant is in the retention position, the longitudinal protrusions are located in the accommodating grooves, respectively.

Preferably, the groove wall surface of the limiting groove includes a first inclined wall surface and a second inclined wall surface which are symmetrically provided along the width direction of the pull tab body, and the outer peripheral surface of the limiting protrusion includes a first inclined limiting surface and a second inclined limiting surface which are symmetrically provided. When the pull tab assistant is in the retention position, the first inclined wall surface and the first inclined limiting surface are in surface contact and engaged with each other, and the second inclined wall surface and the second inclined limiting surface are in surface contact and engaged with each other.

Preferably, the limiting groove is a triangular groove, and the limiting protrusion is a triangular protrusion adapted to the limiting groove.

Preferably, one of the transverse hole walls includes a first inclined segment and a second inclined segment which are symmetrically provided along the width direction of the pull tab body, and the first inclined segment and the second inclined segment are respectively connected with two ends of the limiting groove and both extend obliquely in a manner of being farther away from a transverse center line of the attachment hole as being farther away from the limiting groove. When the pull tab assistant is in the retention position, a connection portion between the first inclined segment and the limiting groove, and a connection portion between the second inclined segment and the limiting groove, abut against an outer peripheral surface of the assistant column portion.

Preferably, the assistant body includes a pull tab connection segment, an obliquely extending segment and a thickened gripping segment which are connected in sequence along a length direction of the assistant body, the assistant column portion is provided at an end of the pull tab connection segment away from the thickened gripping segment and extends along a thickness direction of the assistant body, and the obliquely extending segment extends obliquely in a manner of being farther away from the pull tab body as being closer to the thickened gripping segment.

Preferably, an outer contour size of the assistant head portion is greater than a contour size of the attachment hole, and at least the assistant head portion in the pull tab assistant is an elastically deformable body.

Preferably, the pull tab body is an integrally formed piece and is a zinc alloy piece, and the pull tab assistant is an integrally formed piece and is a TPU piece.

According to another aspect of the present invention, there is provided a fastener slider, including: a slider body; and the fastener pull tab with the detachable pull tab assistant according to claim 1. The pull tab body is connected to the slider body.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic front view of a fastener slider according to the present application.

FIG. 2 is a schematic back view of the fastener slider according to the present application.

FIG. 3 is a right view of the fastener slider according to the present application.

FIG. 4 is a schematic front view of a pull tab body according to the present application.

FIG. 5 is a schematic back view of the pull tab body according to the present application.

FIG. 6 is a right view of the pull tab body according to the present application.

FIG. 7 is a schematic front view of a pull tab assistant according to the present application.

FIG. 8 is a schematic back view of the pull tab assistant according to the present application.

FIG. 9 is a right view of the pull tab assistant according to the present application.

FIG. 10 is a left view of the pull tab assistant according to the present application.

FIG. 11 is a schematic diagram of connection between the pull tab assistant and the pull tab body when the pull tab assistant is in an insertion-removal position according to the present application.

FIG. 12 is a schematic diagram of connection between the pull tab assistant and the pull tab body when the pull tab assistant is in a retention position according to the present application.

FIG. 13 is a schematic diagram of attachment of the pull tab assistant according to the present application.

FIG. 14 is a schematic diagram of detachment of the pull tab assistant according to the present application.

DESCRIPTION OF EMBODIMENTS

Embodiments of the present invention will be described below with specific embodiments. Those skilled in the art could easily understand other advantages and effects of the present invention from contents disclosed in the present description.

It should be noted that structures, proportions, sizes, and the like shown in the drawings of the present description are merely for the understanding and reading of those skilled in the art, in combination with the contents disclosed in the present description, and are not used to limit the conditions under which the present invention can be implemented, and therefore have no technical substantive significance. Any structural modifications, changes in proportions, adjustments of the number of any component, or size adjustments should still fall within the scope of the technical content disclosed in the present invention, as long as they do not affect the effects and objects of the present invention. Meanwhile, terms such as "upper", "lower", "left", "right", and "intermediate" referred to in the present description are merely for the convenience of description and are not used to limit the scope within which the present invention can be implemented, and changes or adjustments of relative relations are also considered to be within the scope within which the present invention can be implemented, as long as there is no substantial technical change.

It should also be noted that when an element is referred to as being "fixed to" or "provided on" another element, the element may be directly fixed to the other element or may be directly provided on the other element, or there may be an intermediate element at the same time. When an element is referred to as being "connected" to another element, the element may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

In addition, descriptions related to "first", "second", and the like in the present application are merely used for description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In addition, technical solutions in various embodiments may be combined, but only if those skilled in the art can implement the combined embodiment. When the combination of the technical solutions appears to be contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist and is not within the protection scope claimed by the present application.

The present application relates to the technical field of fasteners. For convenience of description, in the following embodiments, directions are defined as follows. A length direction of a fastener is defined as a front-rear direction, a width direction of the fastener is defined as a left-right direction, and a thickness direction of the fastener is defined as an up-down direction. The fastener mainly includes a pair of cloth tapes located side by side left and right, fastener stringers respectively fixed on inner edges of the cloth tapes and extending in the front-rear direction, and a fastener slider. The fastener slider can be attached to the fastener stringers in a manner of sliding forward and rearward. When the fastener slider is moved forward, the pair of fastener stringers are engaged, and thus the fastener is closed. When the fastener slider is moved rearward, the pair of fastener stringers are separated, and thus the fastener is opened.

As illustrated in FIGS. 1 to 3, the present invention mainly relates to a fastener slider and a fastener pull tab for the fastener slider. The fastener pull tab is a fastener pull tab with a detachable pull tab assistant 20. A length direction, a width direction, and a thickness direction of the fastener slider correspond to the length direction, the width direction, and the thickness direction of the fastener, respectively. A length direction, a width direction, and a thickness direction of the fastener pull tab also correspond the length direction, the width direction, and the thickness direction of the fastener, respectively. Based on this, in the views illustrated in FIGS. 1, 4 or 7, an upper side of the paper is a front direction, a lower side of the paper is a rear direction, a left side of the paper is a left direction, a right side of the paper is a right direction, a front side of the paper is an upper direction, and a back side of the paper is a lower direction.

The fastener slider according to the present invention includes a slider body 30 and the fastener pull tab with the detachable pull tab assistant 20. As illustrated in FIGS. 1 to 3, the slider body 30 includes an upper blade 31 and a lower blade 32 disposed opposite each other up and down, an element passage formed between the upper blade 31 and the lower blade 32, and a pull tab attachment column portion 33 fixed to an upper surface of the upper blade 31. A part of elements on the fastener stringers are accommodated in the element passage. The fastener pull tab includes a pull tab body 10 and a pull tab assistant 20. A front end of the pull tab body 10 is connected to the pull tab attachment column portion 33 of the slider body 30, and thus the entire fastener pull tab is attached to an upper surface of the slider body 30. A rear end of the pull tab body 10 is detachably connected to the pull tab assistant 20, and thus the pull tab assistant 20 can be replaced.

As illustrated in FIGS. 4 to 6, a front section of the pull tab body 10 is a slider attachment portion 15 to be connected to the pull tab attachment column portion 33 on the slider body 30. Preferably, the slider attachment portion 15 of the pull tab body 10 is provided with a column portion connecting hole 151, and the column portion connecting hole 151 penetrates through the pull tab body 10 along a thickness direction of the pull tab body 10. The slider attachment portion 15 of the pull tab body 10 is attached on the pull tab attachment column portion 33 of the slider body 30 through the column portion connecting hole 151, and thus the pull tab body 10 is attached to the slider body 30.

In particular, as shown in FIGS. 4 and 6, a rear section of the pull tab body 10 is an assistant attachment portion 12 to be connected to the pull tab assistant 20. The pull tab body 10 is provided with, in the assistant attachment portion 12, an attachment hole 11 and limiting grooves 13 both penetrating through the pull tab body 10. The assistant attachment portion 12 is on a periphery of the attachment hole 11. The attachment hole 11 has a non-circular shape, such as an elliptical shape, a rectangular shape, an oblong shape, or a trapezoidal shape. The attachment hole 11 has different hole diameters in at least two intersecting directions, and has a larger hole diameter in a length direction of the attachment hole 11. The limiting groove 13 is at a hole wall of the attachment hole 11 and communicates with the attachment hole 11. As shown in FIGS. 7 to 10, the pull tab assistant 20 includes an assistant body 21 extending in the front-rear direction, an assistant column portion 22 extending downward from a front end of the assistant body 21, an assistant head portion 23 fixed at a lower end of the assistant column portion 22 along an extension direction of the assistant column portion 22, and limiting protrusions 24 protruding from an outer periphery of the assistant column portion 22. The assistant column portion 22 has a cylindrical structure or a prism structure, and is rotatably accommodated in the attachment hole 11. The assistant head portion 23 is fixed at an outer end of the assistant column portion 22, and has a non-circular shape, such as an elliptical shape, a rectangular shape, an oblong shape, or a trapezoidal shape. The assistant head portion 23 has different lengths in at least two intersecting directions, and has a larger length in a length direction of the assistant head portion 23. The limiting protrusions 24 are between the assistant body 21 and the assistant head portion 23 in the up-down direction.

Further, the pull tab assistant 20 is rotatable between an insertion-removal position and a retention position relative to the pull tab body 10. The insertion-removal position and the retention position of the pull tab assistant 20 are two different positions, and the pull tab assistant 20 is rotated to be in the insertion-removal position or the retention position. When the pull tab assistant 20 is in the insertion-removal position, as shown in FIG. 11, the length direction of the assistant head portion 23 is consistent with the length direction of the attachment hole 11, and the attachment hole 11 allows the assistant head portion 23 to pass therethrough. When the pull tab assistant 20 is in the retention position, as shown in FIG. 12, the length direction of the assistant head portion 23 intersects the length direction of the attachment hole 11. The assistant body 21 and the assistant head portion 23 respectively abut against two sides of the assistant attachment portion 12. The assistant column portion 22 is accommodated in the attachment hole 11. The limiting protrusions 24 are respectively accommodated in the limiting grooves 13, and outer peripheral surfaces of the limiting protrusions 24 respectively abut against and are engaged with groove wall surfaces of the limiting grooves 13.

The pull tab body 10 and the pull tab assistant 20 having the above structures achieve rotational detachment and attachment of the pull tab assistant 20 relative to the pull tab body 10, so that the pull tab body 10 and the pull tab assistant 20 can be separated or combined.

When the pull tab assistant 20 is attached, as shown in FIG. 13, the pull tab assistant 20 is first in the insertion-removal position, so that the length direction of the assistant head portion 23 is consistent with the length direction of the attachment hole 11. The assistant head portion 23 is aligned with the attachment hole 11, and then a force is applied to press the assistant head portion 23. Since a maximum length direction of the assistant head portion 23 is consistent with a maximum hole diameter direction of the attachment hole 11 at this time, the assistant head portion 23 can be easily pressed into the attachment hole 11 by applying the force to the assistant head portion 23, so that the assistant head portion 23 easily passes through the attachment hole 11. Then, the pull tab assistant 20 whose assistant head portion 23 has passed through the attachment hole 11 is rotated to the retention position, so that the length direction of the assistant head portion 23 intersects the length direction of the attachment hole 11. As shown in FIG. 2 and FIG. 3, both the attachment hole 11 and the assistant head portion 23 have non-circular shapes, and a size in the length direction of the assistant head portion 23 is larger than the hole diameter of the attachment hole 11 in this direction, so that a part of the assistant head portion 23 protruding beyond than the assistant column portion 22 abuts against the assistant attachment portion 12, that is, the assistant body 21 and the assistant head portion 23 respectively abut against an upper side and a lower side of the assistant attachment portion 12 in the thickness direction of the assistant attachment portion 12. Therefore, the assistant head portion 23 is limited from being disengaged from the attachment hole 11, and the pull tab assistant 20 is connected to the pull tab body 10.

When the pull tab assistant 20 is detached, as shown in FIG. 14, the pull tab assistant 20 is first rotated from the retention position to the insertion-removal position, so that the length direction of the assistant head portion 23 is consistent with the length direction of the attachment hole 11. Then, a force is applied to pull the assistant head portion 23 out of the attachment hole 11. Since the maximum length direction of the assistant head portion 23 is consistent with the maximum hole diameter direction of the attachment hole 11 at this time, the assistant head portion 23 can be easily pulled out of the attachment hole 11 when the force is applied to pull out the pull tab assistant 20. Therefore, the pull tab assistant 20 can be detached from the pull tab body 10.

Therefore, the present application achieves the rotational detachment and attachment of the pull tab assistant 20 relative to the pull tab body 10, and different pull tab assistants 20 can be replaced. The operation of pressing the assistant head portion 23 into the attachment hole 11 or pulling the assistant head portion 23 out of the attachment hole 11 is very easy, so that the detachment and attachment of the pull tab assistant 20 becomes easy. In this way, the attachment and replacement of the pull tab assistant 20 are facilitated, and the assistant body 21 does not need to pass through the attachment hole 11 during the detachment or the attachment. Therefore, any limitation on the assistant body 21 caused by the attachment hole 11 is prevented, and the appearance design of the pull tab assistant 20 is not limited. This enables the present application to use the pull tab assistant 20 with any appearance, thereby greatly improving and enriching the design of the fastener pull tab, and ultimately improving and enriching the designability of fasteners. In particular, after the attachment of the pull tab assistant 20 is completed, the pull tab assistant 20 is always in the retention position. In this state, the limiting protrusions 24 on the pull tab assistant 20 are respectively engaged with the limiting grooves 13, and the outer peripheral surfaces of the limiting protrusions 24 respectively abut against the groove wall surfaces of the limiting grooves 13, thereby increasing a fastening degree between the pull tab assistant 20 and the pull tab body 10. Even when a large gap exists between the assistant column portion 22 and the hole wall of the attachment hole 11, shaking of the pull tab assistant 20 can be reliably limited, and thus the state of the pull tab assistant 20 after the attachment is stably maintained. Furthermore, a structure on the pull tab body 10 which limits the shaking of the pull tab assistant 20 is the limiting groove 13 rather than a protruding structure, so that the appearance of the pull tab body 10 has no obvious protruding part, and the aesthetic appearance of the pull tab body 10 is improved.

Further, the attachment hole 11 may be provided on the pull tab body 10 in various manners as follows. The length direction of the attachment hole 11 may be consistent with a length direction of the pull tab body 10, or may be consistent with a width direction of the pull tab body 10, or may intersect both the length direction and the width direction of the pull tab body 10. In this embodiment, an arrangement structure of the attachment hole 11 on the pull tab body 10 is preferably as follows. As shown in FIGS. 4 and 5, the attachment hole 11 is a rectangular hole. The length direction of the attachment hole 11 is consistent with the width direction of the pull tab body 10, and both directions are the left-right direction, that is, the attachment hole 11 extends left and right along the width direction of the pull tab body 10. The width direction of the attachment hole 11 is consistent with the length direction of the pull tab body 10, and both directions are the front-rear direction. The attachment hole 11 penetrates through the pull tab body 10 up and down along a thickness direction of the pull tab body 10. The attachment hole 11 having the rectangular hole structure has a substantially rectangular hole wall contour as follows. The hole wall of the attachment hole 11 includes a pair of transverse hole walls 111 and a pair of longitudinal hole walls 114. The pair of transverse hole walls 111 face each other in front and rear along the length direction of the pull tab body 10 and extend substantially in the left-right direction. The pair of longitudinal hole walls 114 face each other in left and right along the width direction of the pull tab body 10 and extend both in the front-rear direction. The adjacent transverse hole wall 111 and longitudinal hole wall 114 are transitionally connected by an arc segment 115, that is, four corners of the attachment hole 11 having the rectangular hole structure are arc segments 115. Therefore, the attachment hole 11 has the largest hole diameter between the pair of longitudinal hole walls 114 (that is, in the left-right direction), and the attachment hole 11 has the smallest hole diameter between the pair of transverse hole walls 111 (that is, in the front-rear direction). Of course, in another embodiment, the attachment hole 11 may also be an oblong hole.

Further, a length direction of the assistant body 21 is consistent with the length direction of the assistant head portion 23. When the pull tab assistant 20 is in the insertion-removal position, as shown in FIG. 11, the length direction of the assistant head portion 23, the length direction of the assistant body 21, and the width direction of the pull tab body 10 are consistent, and are all in the left-right direction, and the insertion-removal position of the pull tab assistant 20 is also a horizontal position in the left-right direction. When the pull tab assistant 20 is in the retention position, as shown in FIG. 12, the length direction of the assistant head portion 23, the length direction of the assistant body 21, and the length direction of the pull tab body 10 are consistent, and are all in the front-rear direction, and the retention position of the pull tab assistant 20 is also a vertical position in the front-rear direction. In this way, when the pull tab assistant 20 is attached, as shown in FIG. 11, the pull tab assistant 20 is first in the horizontal position, so that the length direction of the assistant head portion 23 is consistent with the length direction of the attachment hole 11. Then, after the assistant head portion 23 is pressed downward to pass through the attachment hole 11, the pull tab assistant 20 is rotated rearward by 90° to complete the attachment, and at this time, the assistant head portion 23 is perpendicular to the attachment hole 11 and intersects the attachment hole 11 to form a cross shape. Moreover, after the attachment of the pull tab assistant 20 is completed, the assistant body 21 of the pull tab assistant 20 extends along the length direction of the pull tab body 10 and is consistent with the length direction of the fastener, and thus the overall appearance of the fastener pull tab and the fastener has very excellent consistency, which is beneficial to improving the integrity of the fastener pull tab and improving the appearance aesthetics of the fastener pull tab and the fastener.

Further, in both cases where the pull tab assistant 20 is in the insertion-removal position and where the pull tab assistant 20 is in the retention position, after the assistant head portion 23 has passed through the attachment hole 11, the assistant column portion 22 can be accommodated in the attachment hole 11. At this time, due to the rectangular shape or the oblong shape of the attachment hole 11, gaps exist between an outer peripheral surface of the assistant column portion 22 and the pair of longitudinal hole walls 114 of the attachment hole 11, which allows the pull tab assistant 20 to be subsequently rotated more easily, thereby facilitating the detachment and attachment operation of the pull tab assistant 20.

Further, when the pull tab assistant 20 is in the retention position (i.e., the vertical position), as shown in FIGS. 8 to 10, along the length direction of the assistant head portion 23, both front and rear ends of the assistant head portion 23 are respectively provided with longitudinal protrusions 231 extending outward with respect to the assistant column portion 22. The limiting protrusions 24 are between the assistant body 21 and the longitudinal protrusions 231. Along a width direction of the assistant head portion 23, both left and right ends of the assistant head portion 23 are respectively provided with transverse protrusions 232 extending outward with respect to the assistant column portion 22. An extension length of the longitudinal protrusion 231 in the front-rear direction is greater than an extension length of the transverse protrusion 232 in the left-right direction. When the pull tab assistant 20 is in the retention position, the longitudinal protrusions 231 abut against a lower surface of the assistant attachment portion 12. Therefore, the pull tab assistant 20 is limited from being disengaged upward from the pull tab body 10.

Preferably, the extension length of the longitudinal protrusion 231 in the front-rear direction should meet the following conditions. When the pull tab assistant 20 is in the horizontal position shown in FIG. 11 and the assistant head portion 23 is aligned with the attachment hole 11, the assistant head portion 23 is pressed downward, and the assistant head portion 23 can easily pass through the attachment hole 11. After the assistant head portion 23 passes downward through the attachment hole 11 and the pull tab assistant 20 is rotated rearward by 90°, each of the longitudinal protrusions 231 has a large portion abutting against the lower surface of the assistant attachment portion 12, thereby reliably preventing the assistant head portion 23 from being disengaged from the attachment hole 11.

Further, as shown in FIGS. 4 and 5, the limiting groove 13 is provided at an intermediate position of each of the transverse hole walls 111, the limiting groove 13 is on a longitudinal center line in the front-rear direction of the pull tab body 10, and the limiting groove 13 penetrates through the assistant attachment portion 12 up and down along the thickness direction of the assistant attachment portion 12. When the pull tab assistant 20 is in the retention position, the abutting and the engagement between the limiting groove 13 and the limiting protrusion 24 can better restrict the pull tab assistant 20 from shaking in the width direction of the pull tab body 10, prevent the pull tab assistant 20 from deflecting rightward or leftward, and keep the pull tab assistant 20 in a vertical state. Among the pair of transverse hole walls 111 of the attachment hole 11, the limiting groove 13 may be provided only on the front transverse hole wall 111, or the limiting groove 13 may be provided only on the rear transverse hole wall 111, and correspondingly, only one limiting protrusion 24 is provided in the pull tab assistant 20. In this embodiment, as shown in FIGS. 4 and 5, the limiting grooves 13 are respectively provided at the intermediate position of the front transverse hole wall 111 and the intermediate position of the rear transverse hole wall 111, and correspondingly, as shown in FIGS. 9 and 10, two limiting protrusions 24 are provided in the pull tab assistant 20.

Further, an upper surface of the pull tab body 10 is a front surface of the pull tab body 10, and a lower surface of the pull tab body 10 is a back surface of the pull tab body 10. When the pull tab assistant 20 is attached, an insertion direction of the assistant head portion 23 into the attachment hole 11 is downward, that is, a direction from the front surface to the back surface of the pull tab body 10. Preferably, as shown in FIG. 5, along the length direction of the pull tab body 10, the back surface of the assistant attachment portion 12 in the pull tab body 10 is provided with, on both front and rear sides of the attachment hole 11, accommodating grooves 14 communicating with the attachment hole 11. The accommodating groove 14 on the rear side directly extends rearward to a rear edge of the pull tab body 10. When the pull tab assistant 20 is in the retention position, as shown in FIG. 2, the longitudinal protrusions 231 at the front and rear ends of the assistant head portion 23 are respectively located in the front and rear accommodating grooves 14. In this way, random rotation and disengagement of the assistant head portion 23 are limited, and thus random rotation and disengagement of the pull tab assistant 20 are limited, thereby improving attachment reliability of the pull tab assistant 20. Meanwhile, the accommodating grooves 14 are groove structures on the back surface of the pull tab body 10, which does not affect a front appearance of the pull tab body 10 and also prevents causing an obvious protruding part on the appearance of the pull tab body 10, thereby ensuring the aesthetic appearance of the pull tab body 10.

Further, as shown in FIGS. 4 and 5, the groove wall surface of the limiting groove 13 includes a first inclined wall surface 131 and a second inclined wall surface 132 which are symmetrically provided left and right. As shown in FIGS. 9 and 10, the outer peripheral surface of the limiting protrusion 24 includes a first inclined limiting surface 241 and a second inclined limiting surface 242 which are symmetrically provided. When the pull tab assistant 20 is in the retention position, the limiting protrusion 24 is accommodated in the limiting groove 13, the first inclined wall surface 131 and the first inclined limiting surface 241 are in surface contact and engaged with each other, and the second inclined wall surface 132 and the second inclined limiting surface 242 are in surface contact and engaged with each other. Therefore, the fastening degree between the pull tab assistant 20 and the pull tab body 10 after the attachment is better increased, and the shaking of the pull tab assistant 20 is more reliably limited. Preferably, the limiting groove 13 is a triangular groove, or a V-shaped groove, and the limiting protrusion 24 is a triangular protrusion adapted to the limiting groove 13.

Further, among the pair of transverse hole walls 111, at least one transverse hole wall 111 includes a first inclined segment 112 and a second inclined segment 113 which are symmetrically provided left and right. The first inclined segment 112 and the second inclined segment 113 are respectively connected to left and right ends of the limiting groove 13 and both extend obliquely in a manner of being farther away from a transverse center line of the attachment hole 11 as being farther away from the limiting groove 13. In this embodiment, as shown in FIGS. 4 and 5, each of the pair of transverse hole walls 111 includes the first inclined segment 112 and a second inclined segment 113 which are symmetrically provided left and right. Taking a front view angle shown in FIG. 4 as an example, in the front transverse hole wall 111, the first inclined segment 112 on the left side of the limiting groove 13 obliquely extends to the left front, and the second inclined segment 113 on the right side of the limiting groove 13 obliquely extends to the right front. In the rear transverse hole wall 111, the first inclined segment 112 on the left side of the limiting groove 13 obliquely extends to the left rear, and the second inclined segment 113 on the right side of the limiting groove 13 obliquely extends to the right rear. Inclination angles of the first inclined segment 112 and the second inclined segment 113 are small, both about 4°. When the pull tab assistant 20 is in the retention position, a connection portion between the first inclined segment 112 and the limiting groove 13, and a connection portion between the second inclined segment 113 and the limiting groove 13, abut against the outer peripheral surface of the assistant column portion 22. In this way, the four inclined segments of the hole wall of the attachment hole 11 further increases the fastening degree between the pull tab assistant 20 and the pull tab body 10 after the attachment, thereby enhancing a multi-directional pulling force of the pull tab assistant 20, such as enhancing a front pulling force when closing the fastener, a rear pulling force when opening the fastener, and a upward pulling force when the pull tab assistant 20 is pulled upward from the front surface of the pull tab body 10. This can not only enhance a pulling test strength of the pull tab assistant 20, but also prevent the pull tab assistant 20 from being accidentally disengaged from the attachment hole 11 during use.

Further, as shown in FIGS. 7 to 10, the assistant body 21 includes a pull tab connection segment 211, an obliquely extending segment 212, and a thickened gripping segment 213 which are sequentially connected from front to rear along the length direction of the assistant body 21. The assistant column portion 22 is provided at a front end of the pull tab connection segment 211 away from the thickened gripping segment 213 and extends up and down along the thickness direction of the assistant body 21. The obliquely extending segment 212 extends obliquely in a manner of being farther away from the pull tab body 10 as being closer to the thickened gripping segment 213, so that the thickened gripping segment 213 is farther away from a surface of the fastener, which is convenient for a user to grip better. In addition, a thickness of the thickened gripping segment 213 is relatively increased, which provides the user with a more comfortable grip. A back surface of the thickened gripping segment 213 is provided with friction increasing convex strips 214 protruding slightly downward. When the user pulls the fastener slider forward and rearward by gripping a rear end of the assistant body 21, the friction increasing convex strip 214 can increase a friction force between the assistant body 21 and fingers of the user, thereby playing an anti-slip role.

Further, an outer contour size of the assistant head portion 23 is greater than a contour size of the attachment hole 11, that is, a length size of the assistant head portion 23 is greater than a length size of the attachment hole 11 and a width size of the assistant head portion 23 is greater than a width size of the attachment hole 11. At least the assistant head portion 23 in the pull tab assistant 20 is an elastically deformable body. In this way, when the pull tab assistant 20 is attached, a force is applied to press a front end of the pull tab assistant 20 downward, so that the assistant head portion 23 can easily pass through the attachment hole 11 downward. After the assistant head portion 23 passes through the attachment hole 11 downward, the assistant head portion 23 can be limited from passing through the attachment hole 11 upward and being disengaged reversely. Preferably, as shown in FIG. 9, an outer peripheral surface of the assistant head portion 23 is provided with an attachment guide inclined surface 233. The attachment guide inclined surface 233 extends in an inclined manner of being closer to a central axis of the assistant head portion 23 as being farther away from the assistant column portion 22. In this way, when the pull tab assistant 20 is attached, the inclined attachment guide inclined surface 233 facilitates the pressing of the assistant head portion 23 through the attachment hole 11 downward, which makes the attachment operation of the pull tab assistant 20 more convenient.

Further, the pull tab body 10 having the above structure is an integrally formed piece and is a metal piece, preferably a zinc alloy piece, which improves a structural strength of the pull tab body 10 and makes the pull tab body 10 durable. Meanwhile, the pull tab assistant 20 having the above structure is an integrally formed piece and is a plastic piece, for example, may be a hard plastic piece or a soft plastic piece, or may be a rubber piece or a resin piece, preferably a TPU piece. The TPU piece refers to thermoplastic polyurethane, which is convenient for manufacturing the pull tab assistant 20 and has a low cost, and the pull tab assistants 20 with different appearances and colors can be easily designed at a low cost. Combined with the detachable structure of the pull tab assistant 20 on the pull tab body 10, the user can conveniently replace different pull tab assistants 20, and the designability of the fastener is enriched. In addition, during the detachment and attachment of the pull tab assistant 20, even when the pull tab assistant 20 is damaged, or even when the pull tab assistant 20 is damaged after being used for a period of time, there is no significant impact due to the low cost of the pull tab assistant 20.

As described above, the present invention effectively overcomes various disadvantages in the related art and has high industrial utilization value.

The embodiments described above are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

As described above, the present invention provides a fastener pull tab with a detachable pull tab assistant, the fastener pull tab including:

a pull tab body; and

the pull tab assistant, in which

the pull tab body includes an attachment hole penetrating through the pull tab body, an assistant attachment portion on a periphery of the attachment hole, and a limiting groove penetrating through the assistant attachment portion, the limiting groove is at a hole wall of the attachment hole and communicates with the attachment hole, and the attachment hole has different hole diameters in at least two intersecting directions,

the pull tab assistant includes an assistant body, an assistant column portion extending from the assistant body, an assistant head portion provided at an outer end of the assistant column portion along an extension direction of the assistant column portion, and a limiting protrusion protruding from an outer periphery of the assistant column portion, the limiting protrusion is between the assistant body and the assistant head portion, the assistant head portion has different lengths in at least two intersecting directions, and the assistant column portion is rotatably accommodated in the attachment hole,

the pull tab assistant is rotatable between an insertion-removal position and a retention position relative to the pull tab body,

when the pull tab assistant is in the insertion-removal position, a length direction of the assistant head portion is consistent with a length direction of the attachment hole, and the attachment hole allows the assistant head portion to pass therethrough, and

when the pull tab assistant is in the retention position, the length direction of the assistant head portion intersects the length direction of the attachment hole, the assistant body and the assistant head portion respectively abut against two sides of the assistant attachment portion, the limiting protrusion is accommodated in the limiting groove, and an outer peripheral surface of the limiting protrusion abuts against and is engaged with a groove wall surface of the limiting groove.

Firstly, the present application achieves rotational detachment and attachment of the pull tab assistant relative to the pull tab body. Both the attachment hole and the assistant head portion are non-circular structures. The attachment hole has a large hole diameter in the length direction of the attachment hole, and the assistant head portion has a large length in the length direction of the assistant head portion. In this way, when the pull tab assistant is attached, the pull tab assistant is first in the insertion-removal position, and the length direction of the assistant head portion is consistent with the length direction of the attachment hole. At this time, by pressing the assistant head portion, the assistant head portion can be easily and conveniently inserted into the attachment hole and pass through the attachment hole. Then, the pull tab assistant is rotated to the retention position, and the length direction of the assistant head portion intersects the length direction of the attachment hole. At this time, the assistant body and the assistant head portion respectively abut against the two sides of the assistant attachment portion along a thickness direction of the assistant attachment portion, so that the pull tab assistant can be connected to the pull tab body. When the pull tab assistant is detached, the pull tab assistant is first rotated from the retention position to the insertion-removal position, and then a force is applied to pull the assistant head portion out of the attachment hole, so that the pull tab assistant can be disengaged from the pull tab body. Therefore, the present application achieves rotational detachment and attachment of the pull tab assistant relative to the pull tab body, and the operation of pressing the assistant head portion into the attachment hole is extremely easy, which not only facilitates the attachment and replacement of the pull tab assistant, but also does not cause any limitation on the assistant body from the attachment hole, and does not limit appearance design of the pull tab assistant. This enables the present application to use the pull tab assistant with any appearance, thereby greatly improving and enriching design of the fastener pull tab, and ultimately improving and enriching a designability of fasteners.

Secondly, after the attachment of the pull tab assistant is completed, the pull tab assistant is always in the retention position. In this state, the limiting protrusion on the pull tab assistant is engaged with the limiting groove, and the outer peripheral surface of the limiting protrusion abuts against the groove wall surface of the limiting groove, thereby increasing a fastening degree between the pull tab assistant and the pull tab body. Even when a large gap exists between the assistant column portion and the hole wall of the attachment hole, shaking of the pull tab assistant can be reliably limited, and thus the state of the pull tab assistant after the attachment is stably maintained. Furthermore, a structure on the pull tab body which limits the shaking of the pull tab assistant is the limiting groove rather than a protruding structure, so that the appearance of the pull tab body has no obvious protruding part, and the aesthetic appearance of the pull tab body is improved.

Further, an arrangement structure of the attachment hole on the pull tab body is preferably configured as follows. The attachment hole is an oblong hole or a rectangular hole. The length direction of the attachment hole is consistent with a width direction of the pull tab body. A width direction of the attachment hole is consistent with a length direction of the pull tab body. The attachment hole penetrates through the pull tab body along a thickness direction of the pull tab body. The hole wall of the attachment hole includes a pair of transverse hole walls facing each other along the length direction of the pull tab body, and the limiting groove is provided at an intermediate position of one of the transverse hole walls. When the pull tab assistant is in the insertion-removal position, the length direction of the assistant head portion is consistent with the width direction of the pull tab body. When the pull tab assistant is in the retention position, the length direction of the assistant head portion is consistent with the length direction of the pull tab body. After the attachment hole is configured in this way, the hole wall of the attachment hole includes a pair of transverse hole walls facing each other along the length direction of the pull tab body, and the limiting groove is provided at an intermediate position of one of the transverse hole walls. When the pull tab assistant is in the retention position, the pull tab assistant can be better restricted from shaking in the width direction of the pull tab body.

Further, a length direction of the assistant body is consistent with the length direction of the assistant head portion. Both ends of the assistant head portion along the length direction of the assistant head portion are respectively provided with longitudinal protrusions extending outward with respect to the assistant column portion. The limiting protrusion is between the assistant body and one of the longitudinal protrusions. When the pull tab assistant is in the retention position, the longitudinal protrusions abut against a surface of the assistant attachment portion. Therefore, the pull tab assistant is restricted from being disengaged from the attachment hole of the pull tab body. After the attachment of the pull tab assistant is completed, the assistant body of the pull tab assistant extends along the length direction of the pull tab body, and thus the overall appearance of the fastener pull tab has excellent consistency, which is beneficial for improving integrity of the fastener pull tab and improving an aesthetic appearance of the fastener pull tab.

Further, when the pull tab assistant is attached, an insertion direction in which the assistant head portion is inserted into the attachment hole is a direction from a front surface to a back surface of the pull tab body. Along a length direction of the pull tab body, a back surface of the assistant attachment portion in the pull tab body is provided with, on both sides of the attachment hole, accommodating grooves communicating with the attachment hole. When the pull tab assistant is in the retention position, the longitudinal protrusions are located in the accommodating grooves, respectively. In this way, random rotation and disengagement of the assistant head portion can be limited, and thus random rotation and disengagement of the pull tab assistant can be limited, thereby improving attachment reliability of the pull tab assistant. The accommodating grooves are groove structures on the back surface of the pull tab body, which does not affect a front appearance of the pull tab body and also prevent causing an obvious protruding part on the appearance of the pull tab body, thereby ensuring the aesthetic appearance of the pull tab body.

Further, the groove wall surface of the limiting groove includes a first inclined wall surface and a second inclined wall surface which are symmetrically provided along the width direction of the pull tab body. The outer peripheral surface of the limiting protrusion includes a first inclined limiting surface and a second inclined limiting surface which are symmetrically provided. When the pull tab assistant is in the retention position, the first inclined wall surface and the first inclined limiting surface are in surface contact and engaged with each other, and the second inclined wall surface and the second inclined limiting surface are in surface contact and engaged with each other. Therefore, the fastening degree between the pull tab assistant and the pull tab body after the attachment is better increased, and the shaking of the pull tab assistant is more reliably limited.

Preferably, the limiting groove is a triangular groove, and the limiting protrusion is a triangular protrusion adapted to the limiting groove.

Further, one of the transverse hole walls includes a first inclined segment and a second inclined segment which are symmetrically provided along the width direction of the pull tab body. The first inclined segment and the second inclined segment are respectively connected with two ends of the limiting groove and both extend obliquely in a manner of being farther away from a transverse center line of the attachment hole as being farther away from the limiting groove. When the pull tab assistant is in the retention position, a connection portion between the first inclined segment and the limiting groove, and a connection portion between the second inclined segment and the limiting groove, abut against an outer peripheral surface of the assistant column portion. In this way, the hole wall of the attachment hole includes inclined segments, which further increases the fastening degree between the pull tab assistant and the pull tab body after the attachment, thereby enhancing a multi-directional pulling force of the pull tab assistant and preventing the pull tab assistant from being accidentally disengaged from the attachment hole during use.

Further, the assistant body includes a pull tab connection segment, an obliquely extending segment, and a thickened gripping segment which are connected in sequence along a length direction of the assistant body. The assistant column portion is provided at an end of the pull tab connection segment away from the thickened gripping segment and extends along a thickness direction of the assistant body. The obliquely extending segment extends obliquely in a manner of being farther away from the pull tab body as being closer to the thickened gripping segment, so that the thickened gripping segment is farther away from a surface of the fastener, which is convenient for a user to grip better. In addition, a thickness of the thickened gripping segment is relatively increased, which provides the user with a more comfortable grip.

Further, an outer contour size of the assistant head portion is greater than a contour size of the attachment hole, and at least the assistant head portion in the pull tab assistant is an elastically deformable body. Therefore, the assistant head portion can easily pass through the attachment hole, and can be limited from being reversely disengaged after the assistant head portion passes through the attachment hole.

Further, the pull tab body is an integrally formed piece and is a zinc alloy piece, and the pull tab assistant is an integrally formed piece and is a TPU piece. the pull tab body is an integrally formed piece and is a zinc alloy piece, which improves a structural strength of the pull tab body and makes the pull tab body durable. The pull tab assistant is an integrally formed piece and is a TPU piece, which is convenient to manufacture and has a low cost, and pull tab assistants with different appearances and colors can be easily designed at a low cost. Combined with the detachable structure of the pull tab assistant on the pull tab body, the user can conveniently replace different pull tab assistants, and the designability of the fastener is enriched.

The present invention further provides a fastener slider including a slider body and the fastener pull tab with the detachable pull tab assistant described above. The pull tab body is connected to the slider body.

As described above, the fastener pull tab with the detachable pull tab assistant and the fastener slider according to the present invention have the following advantageous effects.

1. The present application achieves rotational detachment and attachment of the pull tab assistant relative to the pull tab body, and the operation of pressing the assistant head portion into the attachment hole is extremely easy, which not only facilitates the attachment and replacement of the pull tab assistant, but also does not cause any limitation on the assistant body from the attachment hole, and does not limit appearance design of the pull tab assistant. This enables the present application to use the pull tab assistant with any appearance, thereby greatly improving and enriching design of the fastener pull tab, and ultimately improving and enriching a designability of fasteners.

2. After the attachment of the pull tab assistant is completed, the pull tab assistant is always in the retention position. In this state, the limiting protrusion on the pull tab assistant is engaged with the limiting groove, and the outer peripheral surface of the limiting protrusion abuts against the groove wall surface of the limiting groove, thereby increasing the fastening degree between the pull tab assistant and the pull tab body. Even when a large gap exists between the assistant column portion and the hole wall of the attachment hole, the shaking of the pull tab assistant can be reliably limited, and thus the state of the pull tab assistant after the attachment is stably maintained. Furthermore, the structure on the pull tab body which limits the shaking of the pull tab assistant is the limiting groove rather than a protruding structure, so that the appearance of the pull tab body has no obvious protruding part, and the aesthetic appearance of the pull tab body is improved.