Zipper Chain

Abstract

To provide a fastener chain which has both a decorative effect on the front side and a fitting effect on the back side and can improve the lateral pulling strength near an insert pin and a box pin. [Solution] The fastener chain includes an insert pin side stringer and a box pin side stringer. The insert pin side stringer includes a plurality of insert pin side elements and insert pins. The box pin side stringer includes a plurality of box pin side elements and a box pin. The box pin side element includes a first box pin side element adjacent to the box pin and at least one second box pin side element. The insert pin has an insert pin element portion that fits with the opposing first box pin side element. The front end portions close to the insert pin element portion each have a semicircular head portion that protrudes toward the box pin side stringer. The rear end portions close to the first box pin side element each have a semicircular head portion that protrudes toward the insert pin side stringer, and the front end portion opposite the box pin on the front side of the first box pin side element has a decorative portion having a shape different from the semicircular head portion.

Description

[Technical field]

[0001] The present invention relates to the fastener field of technology, and in particular to fastener chains. [Background technology]

[0002] A typical fastener usually includes a fastener chain consisting of a pair of fastener stringers, each having a plurality of elements, and a slider attached to the fastener chain to open and close the elements by sliding. A pull tab or the like may be attached to the fastener slider to slide the slider. Among these, an end of the element row provided on the fastener stringer may be provided with open parts such as a separable pin, a retainer pin, and a retainer box for accommodating the separable pin and the retainer pin that are abutted against each other. The box pin and the box body may be provided integrally, and the separable pin may be inserted into the box body to abut against the box pin, but is not limited thereto. After the separated separable pin and the box pin are abutted against each other and stored in the box body, the multiple elements at the front ends of the separable pin and the box pin may be engaged with each other by sliding the slider to close the fastener chain. Furthermore, by sliding the slider in the reverse direction, the multiple elements can be separated to open the fastener chain, and further the insert pin and box pin can be separated to separate the pair of left and right fastener stringers of the fastener chain.

[0003] Furthermore, in the conventional technology, in order to improve the appearance of the fastener chain, the elements provided on the fastener stringer can be deformed to have different shapes on the front and back sides. This allows the front side of the elements to have a decorative effect to improve the appearance of the fastener chain, and the back side of the elements to have a fitting effect to maintain the usability of the fastener chain. However, if the front sides of all the elements are provided with a shape that has a decorative effect to improve the appearance of the fastener chain, the fitting effect of the elements is significantly reduced. In particular, in the areas near the insert pin and box pin, if the fitting effect is reduced, this leads to a reduction in the lateral pull strength near the opening, and the fastener chain becomes more susceptible to damage when the opening is operated (for example, inserting the insert pin and / or box pin into the box body). Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a fastener chain that combines a decorative effect on the front side and a fitting effect on the back side, and can improve the lateral pull strength near the insert pin and box pin. [Means for solving the problem]

[0005] The present invention provides an insert pin side stringer including a plurality of insert pin side elements having different shapes on the front and back sides and arranged along the front-to-rear direction, and an insert pin installed side by side at the rear end of the insert pin side elements; and a box pin side stringer including a plurality of box pin side elements having different shapes on the front and back sides and arranged along the front-to-rear direction, and a box pin installed side by side at the rear end of the box pin side elements, wherein the plurality of insert pin side elements of the insert pin side stringer and the plurality of box pin side elements of the box pin side stringer are interlocked with each other, and the box pin side elements are interlocked with a first box pin side element adjacent to the box pin in a direction opposite to the box pin. The fastener chain includes at least one second box pin side element installed side by side facing each other, the insert pin has an insert pin element portion that fits with the opposing first box pin side element, at least front end portions of the insert pin element portion on the front and back sides that are close to the insert pin side element each have a semicircular head portion protruding toward the box pin side stringer, rear end portions of the first box pin side element on the front and back sides that are close to the box pin each have a semicircular head portion protruding toward the box pin side stringer, and a front end portion of the first box pin side element on the front side that is opposite the box pin has a decorative portion having a shape different from the semicircular head portion.

[0006] In an embodiment of the present invention, in the insert pin element portion, the semicircular head formed at the front end portion of the front side and the semicircular head formed at the front end portion of the back side are installed so as to be offset in the front-to-rear direction.

[0007] In an embodiment of the present invention, in the first box pin side element, the semicircular head formed at the rear end portion of the front side and the semicircular head formed at the rear end portion of the back side are installed so as to be shifted in the front-rear direction.

[0008] In an embodiment of the present invention, the rear end portions of the front and rear sides of the insert pin element portion opposite to the insert pin side element each have a semicircular head portion protruding toward the box pin side stringer.

[0009] In an embodiment of the present invention, in the first box pin side element, the decorative portion formed at the front end portion of the front side extends obliquely toward the insert pin side stringer.

[0010] In an embodiment of the present invention, the front end portion of the first box pin side element opposite the box pin on the back side has a semicircular head portion protruding toward the insert pin side stringer, and in the first box pin side element, the inner edge of the semicircular head portion formed at the front end portion on the back side extends further inward in the left-right direction than the inner edge of the decorative portion formed at the front end portion on the front side.

[0011] In an embodiment of the present invention, the front side of the insert pin side element has a decorative portion extending at an angle from the front end and the rear end toward the box pin side stringer, and the back side of the insert pin side element has a circular head portion protruding from the front end and the rear end toward the box pin side stringer, and in the insert pin side element, the inner edge of the circular head portion formed on the back side extends further inward in the left-right direction than the inner edge of the decorative portion formed on the front side.

[0012] In an embodiment of the present invention, the front side of the second box pin side element has a decorative portion extending at an angle from the front end and the rear end toward the insert pin side stringer, and the back side of the second box pin side element has a circular head portion protruding from the front end and the rear end toward the insert pin side stringer, and in the second box pin side element, the inner edge of the circular head portion formed on the back side extends more inward in the left-right direction than the inner edge of the decorative portion formed on the front side.

[0013] In an embodiment of the present invention, the insert pin side stringer further includes an insert pin side core cord, and the multiple insert pin side elements and the insert pin are installed on the insert pin side core cord, and the box pin side stringer further includes a box pin side core cord, and the multiple box pin side elements and the box pin are installed on the box pin side core cord. Effect of the Invention

[0014] Based on the above, in the fastener chain of the present invention, the insert pin has an insert pin element part that fits with the opposing first box pin side element (adjacent element), at least the front end part of the insert pin element part on the front side and the back side each have a semicircular head that protrudes, the rear end part of the first box pin side element on the front side and the back side each have a semicircular head that protrudes, and the front end part of the front side of the first box pin side element has a decorative part having a different shape from the semicircular head (i.e., the front and rear end parts of the front side of the first box pin side element have different shapes). In this way, not only can the front end part of the back side of the insert pin element part and the rear end part of the back side of the first box pin side element fit together through the semicircular head to obtain a fitting effect, but the front end part of the front side of the insert pin element part and the rear end part of the front side of the first box pin side element also fit together through the semicircular head to further improve the fitting effect, thereby improving the lateral pull strength around the insert pin and the box pin. In addition, the front end part of the front side of the first box pin side element can provide a decorative effect. Therefore, the fastener chain of the present invention has both a decorative effect on the front side and a fitting effect on the back side, and can improve the lateral pulling strength near the insert pin and the box pin. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a plan view of the front side of the fastener chain according to the embodiment of the present invention when closed. [Diagram 2] 2 is a plan view of the back side of the fastener chain shown in FIG. 1 when closed. FIG. [Diagram 3] 2 is a partially enlarged view of the front side of the fastener chain shown in FIG. 1 when it is opened. [Figure 4] 4 is a partial enlarged view of the back side of the fastener chain shown in FIG. 3 when opened. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In order to make the above features and advantages of the present invention clearer and easier to understand, the following embodiments are given and described in detail in conjunction with the drawings.

[0017] FIG. 1 is a plan view of the front side of the fastener chain according to the embodiment of the present invention when closed, and FIG. 2 is a plan view of the back side of the fastener chain shown in FIG. 1 when closed. FIG. 3 is a partial enlarged view of the front side of the fastener chain shown in FIG. 1 when open. FIG. 4 is a partial enlarged view of the back side of the fastener chain shown in FIG. 3 when open. In the following, the specific structure of the fastener chain 100 according to the present embodiment will be described with reference to FIG. 1 to FIG. 4, in which the front side refers to the side that becomes the external surface after the fastener chain 100 is applied to a product (for example, sewn to the fabric of a product such as clothing, bags, and shoes), and the back side refers to the side that is hidden in the product after the fastener chain 100 is applied to the product (i.e., the non-external surface side), but the present invention is not limited thereto and can be adjusted as necessary.

[0018] 1 and 2, in this embodiment, the fastener chain 100 includes an insert pin side stringer 110 and a box pin side stringer 120. The insert pin side stringer 110 includes a plurality of insert pin side elements 112 having different shapes on the front and back sides and arranged along the front-rear direction X, and an insert pin 114 arranged side by side at the rear end of the insert pin side elements 112. The box pin side stringer 120 includes a plurality of box pin side elements 122 having different shapes on the front and back sides and arranged along the front-rear direction X, and a box pin 124 arranged side by side at the rear end of the box pin side elements 122. The plurality of insert pin side elements 112 of the insert pin side stringer 110 and the plurality of box pin side elements 122 of the box pin side stringer 120 mesh with each other. Among them, the box pin side element 122 includes a first box pin side element 122A adjacent to the box pin 124, and at least one second box pin side element 122B installed side by side facing the opposite direction (i.e., the front side) to the box pin 124. The insert pin 114 has an insert pin element portion 114a that fits with the opposing first box pin side element 122A.

[0019] Specifically, in this embodiment, as shown in Fig. 1 and Fig. 2, the insert pin side stringer 110 and the box pin side stringer 120 are strip-shaped fastener stringers extending along the front-rear direction X, and are installed in pairs in the left-right direction Y. Here, the left fastener stringer is provided with an insert pin 114 to form the insert pin side stringer 110, and the right fastener stringer is provided with a box pin 124 to form the box pin side stringer 120, and the insert pin 114 and the box pin 124 are installed at the rear end of each fastener stringer (i.e., the lower side of the figure), but the front-rear direction X (i.e., the up-down direction, corresponding to the length direction of the figure) and the left-right direction Y (i.e., the left-right direction, corresponding to the width direction of the figure) can be adjusted according to the actual use of the fastener chain 100, and the present invention is not limited thereto. The fastener chain 100 further includes a box body 102 for accommodating the insert pin 114 and the box pin 124 that are butted against each other, and a pair of wings 104 provided on the outer sides of the insert pin 114 and the box pin 124 in the left and right direction, and openings such as the insert pin 114 and the box pin 124 of the fastener chain 100 are sewn to the product through the wings 104. However, the present invention does not limit the application of other parts of the fastener chain 100, the means for attaching it to the product, or the type of product to which it is applied, and adjustments can be made as necessary.

[0020] 1 and 2, in this embodiment, in a closed state of the fastener chain 100, the insert pin 114 and the box pin 124 are inserted, for example, into the box body 102 located at the end of the fastener chain 100. Also, the rear end of the insert pin element portion 114a of the insert pin 114 of the insert pin side stringer 110 corresponds to the front end of the box pin 124 of the box pin side stringer 120, and the front end of the insert pin element portion 114a of the insert pin 114 of the insert pin side stringer 110 corresponds to the rear end of the first box pin side element 122A of the box pin side stringer 120, so that the insert pin element portion 114a of the insert pin 114 is located between the box pin 124 of the box pin side stringer 120 and the first box pin side element 122A. In addition, the rear end of the first box pin side element 122A of the box pin side stringer 120 corresponds to the front end of the insert pin element portion 114a of the insert pin 114 of the insert pin side stringer 110, and the front end of the first box pin side element 122A of the box pin side stringer 120 corresponds to the rear end of the insert pin side element 112 that is closest to the insert pin 114 of the insert pin side stringer 110, so that the first box pin side element 122A is positioned between the insert pin element portion 114a of the insert pin 114 of the insert pin side stringer 110 and the insert pin side element 112 that is closest to the insert pin 114. Similarly, the other insert pin side element 112 of the insert pin side stringer 110 and the second box pin side element 122 of the box pin side stringer 120 are connected with their front ends and rear ends offset from one another, so that the multiple insert pin side elements 112 of the insert pin side stringer 110 and the multiple box pin side elements 122 of the box pin side stringer 120 mesh with each other.

[0021] 3 and 4, in the present embodiment, in the insert pin element portion 114a of the insert pin 114 of the insert pin side stringer 110, the front end portion E11 adjacent to the insert pin side element 112 on the front side (FIG. 3) of the insert pin element portion 114a, and the front end portion E12 adjacent to the insert pin side element 112 on the back side (FIG. 4) of the insert pin element portion 114a each have a semicircular head portion protruding toward the box pin side stringer 120. Correspondingly, in the first box pin side element 122A of the box pin side stringer 120, the rear end portion E21 adjacent to the box pin 124 on the front side (FIG. 3) of the first box pin side element 122A, and the rear end portion E22 adjacent to the box pin 124 on the back side (FIG. 4) of the first box pin side element 122A each have a semicircular head portion protruding toward the insert pin side stringer 110. Here, the circular head portion refers to a head portion that extends from the main body portion of the element toward the opposite side, contracts inward to form a neck portion, and then expands larger than the neck portion and has a circular arc surface, so that the entire element forms a shape like a pot-shaped doll, making it easier for the element to mesh with the opposite element (i.e., the circular head portion of the element is located between the neck portions of the two opposite elements). The semicircular head portion refers to a state in which, after the element is divided into a front end portion and a rear end portion by the center line, the end portion is formed to have a half shape of a circular head portion, and the end portion has a neck portion and a half of a head portion. Therefore, the front end portion E11 on the front side (FIG. 3) and the front end portion E12 on the back side (FIG. 4) of the insert pin element portion 114a form a semicircular head portion protruding toward the front side (upper side of the figure), and the rear end portion E21 on the front side (FIG. 3) and the rear end portion E22 on the back side (FIG. 4) of the first box pin side element 122A are formed into a semicircular head portion protruding toward the rear side (upper side of the figure).

[0022] In this embodiment, as shown in Figs. 3 and 4, in the first box pin side element 122A of the box pin side stringer 120, the front end E31 opposite the box pin 124 on the front side (Fig. 3) of the first box pin side element 122A has a decorative part having a shape different from a semicircular head. Here, the decorative part has a shape different from a circular head or a semicircular head, and tends to provide a decorative effect (described later) rather than an effect of fitting the opposing elements to each other. For this reason, in the fastener chain 100, not only are the insert pin side element 112 and the box pin side element 122 provided as deformed elements having different shapes on the front side and the back side, but as shown in Fig. 3, the front end E31 and the rear end E21 on the front side of the first box pin side element 122A also have different shapes. In this way, the first box pin side element 122A itself has both a decorative effect and a fitting effect. The semicircular head formed on the rear end E21 on the front side (Figure 3) and the rear end E22 on the back side (Figure 4) of the first box pin side element 122A can be fitted into the semicircular head formed on the front end E11 on the front side (Figure 3) and the front end E12 on the back side (Figure 4) of the insert pin element portion 114a, thereby improving the fitting effect on both the front and back sides, and providing a decorative effect through the decorative portion formed on the front end E31 on the front side of the first box pin side element 122A.

[0023] With the above arrangement, in the fastener chain 100 of this embodiment, the insert pin 114 has an insert pin element portion 114a that fits with the opposing first box pin side element 122A (adjacent element), at least the front end portions E11, E12 on the front and back sides of the insert pin element portion 114a each have a protruding semicircular head, the rear end portions E21, E22 on the front and back sides of the first box pin side element 122A each have a protruding semicircular head, and the front end portion E31 on the front side of the first box pin side element 122A has a decorative portion having a different shape from the semicircular head (i.e., the front and rear end portions on the front side of the first box pin side element 122A have different shapes). In this way, the front end E12 on the back side of the insert pin element part 114a and the rear end E22 on the back side of the first box pin side element 122A are fitted together via a semicircular head (see FIG. 2) to obtain a fitting effect, and the front end E11 on the front side of the insert pin element part 114a and the rear end E21 on the front side of the first box pin side element 122A are also fitted together via a semicircular head (see FIG. 1) to further improve the fitting effect, thereby improving the lateral pull strength near the insert pin 114 and the box pin 124. In addition, the decorative part formed on the front end E31 on the front side of the first box pin side element 122A can provide a decorative effect (see FIG. 1). Therefore, the fastener chain 100 has both the decorative effect on the front side and the fitting effect on the back side, and can improve the lateral pull strength near the insert pin 114 and the box pin 124.

[0024] 3 and 4, in the present embodiment, in the insert pin element part 114a, the semicircular head part formed at the front end part E11 on the front side (FIG. 3) and the semicircular head part formed at the front end part E12 on the back side (FIG. 4) are arranged to be offset in the front-rear direction X. For example, the semicircular head part formed at the front end part E11 on the front side of the insert pin element part 114a is arranged to be offset toward the rear end (i.e., the lower side of the figure) in the front-rear direction X compared to the semicircular head part formed at the front end part E12 on the back side, and as a result, as can be seen from the front side shown in FIG. 3, the semicircular head part formed at the front end part E12 on the back side of the insert pin element part 114a extends toward the front end (i.e., the upper side of the figure) more than the semicircular head part formed at the front end part E11 on the front side. Correspondingly, in the first box pin side element 122A, the semicircular head formed at the rear end E21 on the front side (FIG. 3) and the semicircular head formed at the rear end E22 on the rear side (FIG. 4) are offset in the front-rear direction X. For example, the semicircular head formed at the rear end E21 on the front side of the first box pin side element 122A is offset toward the rear end (i.e., the bottom side of the figure) in the front-rear direction X compared to the semicircular head formed at the rear end E22 on the rear side, so that, as can be seen from the rear side in FIG. 4, the semicircular head formed at the rear end E21 on the front side of the first box pin side element 122A extends toward the rear end (i.e., the bottom side of the figure) more than the semicircular head formed at the rear end E22 on the rear side. With the above-mentioned arrangement, the front end portions E11, E12 on the front and back sides of the insert pin element portion 114a and the rear end portions E21, E22 on the front and back sides of the first box pin side element 122A are not only fitted together via semicircular heads (see FIGS. 1 and 2) to obtain a fitting effect, but are also offset in the front-rear direction X (see FIGS. 3 and 4) to increase the contact area during fitting, thereby improving the lateral tensile strength near the insert pin 114 and the box pin 124.

[0025] Similarly, in this embodiment, as shown in Figures 3 and 4, in the insert pin 114 of the insert pin side stringer 110, the rear end E41 opposite the insert pin side element 112 on the front side (Figure 3) of the insert pin element part 114a and the rear end E42 opposite the insert pin side element 112 on the back side (Figure 4) each have a semicircular head portion protruding toward the box pin side stringer 120. As a result, the semicircular head portion formed at the front end E11 on the front side (Figure 3) of the insert pin element part 114a and the semicircular head portion formed at the rear end E41 form a circular head portion protruding toward the box pin side stringer 120, and are located between the front end E51 on the front side of the box pin 124 and the rear end E21 on the front side of the first box pin side element 122A. Further, the semicircular head portion formed at the front end portion E12 on the rear side (FIG. 4) of the insert pin element portion 114a and the semicircular head portion formed at the rear end portion E42 form a circular head portion protruding toward the box pin side stringer 120, and is located between the front end portion E52 on the rear side of the box pin 124 and the rear end portion E22 on the rear side of the first box pin side element 122A. Correspondingly, the front end portion E51 on the front side (FIG. 3) of the box pin 124 is provided as a recess corresponding to the semicircular head portion formed at the rear end portion E41 on the front side of the insert pin element portion 114a, and the front end portion E52 on the rear side (FIG. 4) of the box pin 124 is provided as a semicircular head portion corresponding to the semicircular head portion formed at the rear end portion E42 on the rear side of the insert pin element portion 114a. In this way, the rear end E41 on the front side of the insert pin element part 114a and the front end E51 on the front side of the box pin 124 are connected to each other by the corresponding semicircular heads and recesses (see FIG. 1), which can improve the decorative effect, and the rear end E42 on the back side of the insert pin element part 114a and the front end E52 on the back side of the box pin 124 are fitted to each other by the corresponding semicircular heads (see FIG. 2), which can improve the fitting effect. However, the present invention is not limited to this and can be adjusted as necessary.

[0026] Furthermore, in this embodiment, as shown in Figures 3 and 4, the front end E32 opposite the box pin 124 on the back side (Figure 4) of the first box pin side element 122A has a semicircular head protruding toward the insert pin side stringer 110. That is, the front end E31 on the front side (Figure 3) of the first box pin side element 122A and the front end E32 on the back side (Figure 4) have different shapes. Among these, in the first box pin side element 122A, the decorative portion formed on the front end E31 on the front side (Figure 3) extends at an incline toward the insert pin side stringer 110, and forms, for example, a slope portion that is inclined from the outside to the inside (i.e., between a pair of stringers) and from the front end to the rear end. Similarly, the front side (FIG. 3) of the insert pin side element 112 has a decorative portion (an acute angle portion formed by a pair of front and rear inclined portions) that extends from the front end E61 and the rear end E71 toward the box pin side stringer 120, and the back side (FIG. 4) of the insert pin side element 112 has a circular head portion (a circular head portion formed by a pair of front and rear semicircular head portions) that protrudes from the front end E62 and the rear end E72 toward the box pin side stringer 120. Also, the front side (FIG. 3) of the second box pin side element 122B has a decorative portion that extends from the front end E81 and the rear end E91 toward the insert pin side stringer 110, and the back side (FIG. 4) of the second box pin side element 122B has a circular head portion that protrudes from the front end E82 and the rear end E92 toward the insert pin side stringer 110.

[0027] 1 and 3, in this embodiment, the decorative portions (slope portions or acute angle portions) formed on the front end E31 on the front side of the first box pin side element 122A, the front end E61 and the rear end E71 on the front side of the insert pin side element 112, and the front end E81 and the rear end E91 on the front side of the second box pin side element 122B are butted against each other to form a continuous sawtooth shape along the front-rear direction X, thereby providing a decorative effect. Correspondingly, as shown in FIG. 2 and FIG. 4, the semicircular heads or circular heads formed on the front end E32 on the rear side of the first box pin side element 122A, the front end E62 and the rear end E72 on the rear side of the insert pin side element 112, and the front end E82 and the rear end E92 on the rear side of the second box pin side element 122B are butted against each other to form a continuous wave shape along the front-rear direction X, thereby providing a fitting effect. Comparing the decorative portion with the circular head portion, the circular head portion protrudes toward the opposing stringer and expands in the front-rear direction X, so that the contact area with the opposing element is increased, and a better fitting effect is achieved. Correspondingly, the decorative portion forms an inclined surface portion or an acute angle portion consisting of a pair of front and rear inclined surfaces, which can reduce the gap between the elements and visually improve the aesthetic appearance, that is, has a good decorative effect. However, the present invention is not limited to this and can be adjusted as necessary.

[0028] 3 and 4, in the present embodiment, in the insert pin side element 112, the inner edge S11 of the circular head portion formed at the front end E62 and the rear end E72 on the rear side (FIG. 4) extends inward (i.e., between the insert pin side stringer 110 and the box pin side stringer 120) from the inner edge S12 of the decorative portion (acute angle portion) formed at the front end E61 and the rear end E71 on the front side (FIG. 3) in the left-right direction Y. Correspondingly, in the second box pin side element 122B, the inner edge S21 of the circular head portion formed at the front end E82 and the rear end E92 on the rear side (FIG. 4) extends inward from the inner edge S22 of the decorative portion (acute angle portion) formed at the front end E81 and the rear end E91 on the front side (FIG. 3) in the left-right direction Y. Similarly, in the first box pin side element 122A, the inner edge S31 of the semicircular head portion formed at the front end E32 on the back side (Fig. 4) extends further inward than the inner edge S32 of the decorative portion (slope portion) formed at the front end E31 on the front side (Fig. 3) in the left-right direction Y. That is, in the front and rear end portions of these elements, when a decorative portion is formed on the front side and a semicircular head portion / circular head portion is formed on the back side, it is preferable that the inner edge of the back side where the semicircular head portion / circular head portion is formed extends further inward (i.e., toward the opposing stringer) than the inner edge of the front side where the decorative portion is formed.

[0029] As can be seen from this, as seen from the front side as shown in Fig. 3, in the insert pin side element 112, the inner edge S11 of the front end E62 and the rear end E72 on the rear side protrudes toward the opposing insert pin side stringer 120 (i.e., the right side of the figure) more than the inner edge S12 of the front end E61 and the rear end E71 on the front side. Correspondingly, in the second box pin side element 122B, the inner edge S21 of the front end E82 and the rear end E92 on the rear side protrudes toward the opposing insert pin side stringer 110 (i.e., the left side of the figure) more than the inner edge S22 of the front end E81 and the rear end E91 on the front side. Similarly, in the first box pin side element 122A, the inner edge S31 of the front end E32 on the rear side protrudes toward the opposing insert pin side stringer 110 (i.e., the left side of the figure) more than the inner edge S32 of the front end E31 on the front side. In this way, the lateral contact area in the left-right direction Y of the circular head / semicircular head facing the circular head / semicircular head on the back side is increased compared to the decorative part on the front side (the slope part or the acute angle part), and the fitting effect on the back side can be further improved. However, the present invention is not limited to this and can be adjusted as necessary.

[0030] 1 and 2, in this embodiment, the insert pin side stringer 110 further includes an insert pin side core string 116, and the multiple insert pin side elements 112 and the insert pin 114 are installed on the insert pin side core string 116. Correspondingly, the box pin side stringer 120 further includes a box pin side core string 126, and the multiple box pin side elements 122 (including a first box pin side element 122A and a second box pin side element 122B) and the box pin 124 are installed on the box pin side core string 126. As an example, the multiple insert pin side elements 112 and the insert pin 114 are formed into the insert pin side core string 116 by, for example, injection molding, thereby constituting the insert pin side stringer 110, and can be sewn to a product via a sewing thread. Similarly, the multiple box pin side elements 122 and the box pin 124 are formed on the box pin side core string 126 by, for example, injection molding, thereby forming the box pin side stringer 120, and can be sewn to the product via sewing thread. That is, the insert pin side stringer 110 and the box pin side stringer 120 are fastener stringers that do not use fastener tape, thereby connecting the insert pins / box pins corresponding to the elements in series with a core string. However, in other embodiments not shown, the insert pin side stringer 110 and the box pin side stringer 120 can also be fastener stringers with fastener tape, thereby forming the insert pins / box pins corresponding to the elements on the fastener tape (by injection molding, sewing, etc.). This utility model does not limit the types of the insert pin side stringer 110 and the box pin side stringer 120 used in the fastener chain 100. As long as the insert pin side stringer 110 and the box pin side stringer 120 used in the fastener chain 100 have an insert pin 114 and a box pin 124, and the insert pin side element 112 and the box pin side element 122 are irregular elements having different shapes on the front and back sides, the above structural settings described in this embodiment are applied, and the remaining parts can be adjusted as necessary.

[0031] In summary, in the fastener chain of the present invention, the insert pin has an insert pin element part that fits with the opposing first box pin side element (adjacent element), at least the front end part of the insert pin element part on the front side and the back side each have a semicircular head that protrudes, the rear end part of the first box pin side element on the front side and the back side each have a semicircular head that protrudes, and the front end part of the front side of the first box pin side element has a decorative part having a different shape from the semicircular head (i.e., the front and rear end parts of the front side of the first box pin side element have different shapes). In this way, not only can the front end part of the back side of the insert pin element part and the rear end part of the back side of the first box pin side element fit together through the semicircular head to obtain a fitting effect, but the front end part of the front side of the insert pin element part and the rear end part of the front side of the first box pin side element also fit together through the semicircular head to further improve the fitting effect, thereby improving the lateral pull strength around the insert pin and the box pin. In addition, the front end part of the front side of the first box pin side element can provide a decorative effect. Preferably, in the insert pin element portion, the semicircular head portion formed at the front end portion of the front side and the semicircular head portion formed at the front end portion of the back side are disposed so as to be shifted upward in the front-rear direction, and in the first box pin element, the semicircular head portion formed at the rear end portion of the front side and the semicircular head portion formed at the rear end portion of the back side are disposed so as to be shifted upward in the front-rear direction, thereby further improving the lateral tensile strength in the vicinity of the insert pin and the box pin. Therefore, the fastener chain of the present invention has both the decorative effect on the front side and the fitting effect on the back side, and can improve the lateral tensile strength in the vicinity of the insert pin and the box pin.

[0032] Finally, it should be noted that the above embodiments are only used to explain the technical solution of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can naturally understand that the technical solution described in the above embodiments can still be modified or replaced with equivalents for part or all of the technical features, but such modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present invention. [Explanation of symbols]

[0033] 100: Zipper chain 102: Box body 104: Wing part 110: Stringer on the side of the tie bar 112: Insert pin side element 114: Butterfly stick 114a: Insert pin element part 116: Side core string with butterfly pin 120: Box bar side stringer 122: Box bar side element 122A: 1st box rod side element 122B: 2nd box rod side element 124: Box bar 126: Box rod side core string S11, S12, S21, S22, S31, S32: Inner edge E11, E12, E31, E32, E51, E52, E61, E62, E81, E82: Front end E21, E22, E41, E42, E71, E72, E91, E92: Rear end X: Anteroposterior direction Y: Left / right direction

Claims

1. a separator-side stringer (110) including a plurality of separator-side elements (112) arranged along a front-rear direction (X) having front and rear sides with different shapes, and separator pins (114) arranged in a row at rear ends of the separator-side elements (112); A box pin side stringer (120) including a plurality of box pin side elements (122) having different shapes on the front and back sides and arranged along the front-rear direction (X), and a box pin (124) arranged in a row at the rear ends of the box pin side elements (122); Equipped with The plurality of insert pin side elements (112) of the insert pin side stringer (110) and the plurality of box pin side elements (122) of the box pin side stringer (120) mesh with each other, The box pin side element (122) includes a first box pin side element (122A) adjacent to the box pin (124) and at least one second box pin side element (122B) arranged side by side in a direction opposite to the box pin (124), The insert pin (114) has an insert pin element portion (114a) which fits into the opposing first box pin element (122A), front end portions (E11, E12) of the front and back sides of the insert pin element portion (114a) adjacent to at least the insert pin side element (112) each have a semicircular head portion protruding toward the box pin side stringer (120); The rear end portions (E21, E22) of the first box pin side element (122A) adjacent to the box pin (124) on the front and rear sides each have a semicircular head portion protruding toward the insert pin side stringer (110), and A fastener chain (100) characterized in that a front end portion (E31) of the first box pin side element (122A) opposite the box pin (124) on the front side has a decorative portion having a shape different from the semicircular head portion.

2. The fastener chain (100) according to claim 1, characterized in that, in the insert pin element portion (114a), the semicircular head portion formed at the front end portion (E11) on the front side and the semicircular head portion formed at the front end portion (E12) on the back side are installed so as to be shifted in the front-rear direction (X).

3. The fastener chain (100) according to claim 1 or 2, characterized in that, in the first box pin side element (122A), the semicircular head portion formed at the rear end portion (E21) on the front side and the semicircular head portion formed at the rear end portion (E22) on the back side are installed so as to be shifted in the front-rear direction (X).

4. The fastener chain (100) according to claim 1 or 2, characterized in that rear end portions (E41, E42) opposite the insert pin side element (112) on the front side and the back side of the insert pin element portion (114a) each have a semicircular head portion protruding toward the box pin side stringer (120).

5. The fastener chain (100) according to claim 1 or 2, characterized in that, in the first box pin side element (122A), the decorative portion formed on the front end portion (E31) on the front side extends obliquely toward the insert pin side stringer (110).

6. A front end portion (E32) of the first box pin side element (122A) facing the box pin (124) on the rear side has a semicircular head portion protruding toward the insert pin side stringer (110), and The fastener chain (100) according to claim 1 or 2, characterized in that, in the first box pin side element (122A), an inner edge (S31) of the semicircular head portion formed at the front end portion (E32) on the back side extends more inward in the left-right direction (Y) than an inner edge (S32) of the decorative portion formed at the front end portion (E31) on the front side.

7. The front side of the insert pin side element (112) has a decorative portion extending obliquely from a front end portion (E61) and a rear end portion (E71) toward the box pin side stringer (120), The insert pin side element (112) has a circular head portion protruding from a front end portion (E62) and a rear end portion (E72) toward the box pin side stringer (120) on the back side thereof, and The fastener chain (100) according to claim 1 or 2, characterized in that, in the insert pin side element (112), an inner edge (S11) of the circular head portion formed on the back side extends more inward in the left-right direction (Y) than an inner edge (S12) of the decorative portion formed on the front side.

8. The second box pin side element (122B) has a front side with a decorative portion extending obliquely from a front end portion (E81) and a rear end portion (E91) toward the insert pin side stringer (110), The second box pin side element (122B) has a circular head portion protruding from a front end portion (E82) and a rear end portion (E92) toward the insert pin side stringer (110) on the back side thereof, and The fastener chain (100) according to claim 1 or 2, characterized in that, in the second box pin side element (122B), an inner edge (S21) of the circular head portion formed on the back side extends more inward in the left-right direction (Y) than an inner edge (S22) of the decorative portion formed on the front side.

9. The insert pin side stringer (110) further includes an insert pin side core string (116), and the plurality of insert pin side elements (112) and the insert pin (114) are installed on the insert pin side core string (116), The fastener chain (100) according to claim 1 or 2, characterized in that the box bar side stringer (120) further includes a box bar side core string (126), and the plurality of box bar side elements (122) and the box bar (124) are installed on the box bar side core string (126).

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