Double-opening zipper

Abstract

The utility model provides a double-opening zipper which can give consideration to the high contact area of an insertion rod protrusion and a seat rod protrusion and avoid interference of a locking claw of a puller. The double-end zipper includes a pair of zipper stringers and a pair of sliders. The pair of fastener stringers includes a pair of fastener tapes, a pair of element rows, and a plunger and a seat bar. The pair of sliders is provided on the pair of fastener stringers in a state in which the tails face each other. Wherein each of the pair of sliders is provided with a slider body and a locking claw protruding towards the zipper tooth channel. The plunger has a plunger body, a plunger protrusion, and a groove. The seat bar has a seat bar body and a seat bar protrusion. The plunger protrusion has a half-tooth portion and an inclined portion located on the upper side of the half-tooth portion. The inclined portion has an inclined surface that is inclined from the upper surface of the plunger body toward a protruding side edge of the half-tooth portion and that is inclined from above to below, and the size of the inclined portion in the vertical direction is greater than the amount of protrusion of the locking claw in the vertical direction from the wing plate into the element channel.

Description

Technical Field

[0001] This utility model relates to the technology of fasteners, and more particularly to a two-wayseparator. Background Technology

[0002] A common zipper consists of a pair of zipper tapes and a pair of element columns mounted on the zipper tapes, forming a zipper stringer. A slider is located on the zipper stringer and opens or closes the element columns by sliding. The sliding of the slider causes the element columns to engage or disengage, thus opening or closing the zipper chain. A double-ended zipper refers to a pair of sliders positioned with their tails facing each other on the zipper string. The sliders slide along the zipper string in the forward and backward directions (corresponding to the length direction) of the pair of zipper stringers, respectively, as the opening direction. Furthermore, the pair of zipper stringers may also have a separateable pin and a retainer pin at their rear ends, serving as opening parts. With the insert bar and the base bar connected to each other (e.g., at least a portion of the insert bar is inserted into the base bar), the rear ends of a pair of zipper teeth are closed by the insert bar and the base bar, thus serving as a stopping point when a pair of zipper heads slide backward in the front-back direction on a pair of zipper teeth.

[0003] In existing technology, to avoid the zipper pull going over the line when passing through the insert bar and the base bar, the contact area between the protrusions of the insert bar and the base bar when they are mated is tended to be increased. However, when the zipper pull has a locking pin that protrudes from the wing plate of the zipper pull body into the chain tooth channel, the locking pin of the zipper pull may interfere with the increased contact area of ​​the protrusions of the insert bar or the base bar when the zipper pull passes through the insert bar and the base bar, which may cause damage to the protrusions of the insert bar or the base bar.

[0004] Therefore, it is necessary to improve the structure of the double-ended zipper in order to balance the high contact area between the insert bar protrusion and the seat bar protrusion and avoid interference from the locking claw of the zipper head. Utility Model Content

[0005] This invention provides a double-ended zipper that can balance the high contact area between the insert bar protrusion and the seat bar protrusion while avoiding interference from the locking claw of the zipper head.

[0006] This utility model provides a double-ended zipper, comprising: a pair of zipper teeth, including a pair of zipper strips extending in a front-to-back direction and arranged opposite each other in a left-to-right direction; a pair of zipper teeth arranged along the front-to-back direction on the pair of zipper strips and capable of engaging or disengaging with each other; and an insert bar and a seat bar respectively disposed at the rear ends of the pair of zipper strips; and a pair of zipper pulls disposed on the pair of zipper teeth with their tails facing each other, and capable of sliding along the zipper teeth in the front-to-back direction with the front and rear directions respectively as the opening directions for opening the pair of zipper teeth, wherein when the pair of zipper pulls are located at the rear ends of the pair of zipper strips and are adjacent to each other in the front-to-back direction, the insert bar and the seat bar can be inserted into or removed from the pair of zipper pulls. A pair of zipper pulls are pulled out. Each of the zipper pulls has a zipper pull body and a locking claw protruding from the wing plate of the zipper pull body into the chain tooth channel. The insert has an insert body, an insert protrusion protruding from the insert body toward the base bar, and a groove located at the rear end of the insert protrusion. The base bar has a base bar body and a base bar protrusion protruding from the base bar body toward the insert bar and engaging with the groove. The insert protrusion has a half-tooth portion and an inclined portion located above the half-tooth portion. The inclined portion has an inclined surface that protrudes from the upper surface of the insert bar body toward the half-tooth portion and slopes downward in the vertical direction. The dimension of the inclined portion in the vertical direction is greater than the amount by which the locking claw protrudes from the wing plate into the chain tooth channel in the vertical direction.

[0007] In an embodiment of the double-ended zipper of this utility model, the inclined surface of the inclined portion includes a curved surface.

[0008] In an embodiment of the double-ended zipper of this utility model, the inclined surface of the inclined portion includes a first curved surface and a second curved surface connected to each other, and the curvature of the first curved surface is different from the curvature of the second curved surface.

[0009] In an embodiment of the double-ended zipper of this utility model, the half-tooth portion includes a connecting portion connected to the insert body and a head protruding forward from the front end of the connecting portion, and the size of the inclined portion in the front-back direction does not exceed the size of the connecting portion in the front-back direction.

[0010] In an embodiment of the double-ended zipper of this utility model, the front edge of the inclined portion in the front-rear direction has a chamfer.

[0011] In an embodiment of the double-ended zipper of this utility model, the dimension of the seat protrusion in the vertical direction is equal to the dimension of the insert protrusion in the vertical direction.

[0012] In an embodiment of the double-ended zipper of this utility model, the dimension of the inclined portion in the vertical direction is larger than the dimension of the half-tooth portion in the vertical direction.

[0013] In an embodiment of the double-ended zipper of this utility model, the connecting edge of the inclined portion connected to the half-tooth portion is spaced apart from the protruding side edge of the half-tooth portion to form a platform portion on the upper side of the half-tooth portion.

[0014] Based on the above, in the double-ended zipper of this utility model, the insert bar has an insert bar body, an insert bar protrusion protruding from the insert bar body, and a groove located at the rear end of the insert bar protrusion. The seat bar has a seat bar body and a seat bar protrusion protruding from the seat bar body and engaging with the groove. The insert bar protrusion has a semi-tooth portion and an inclined portion located on the upper side (i.e., the front side) of the semi-tooth portion. The inclined portion has an inclined surface that slopes from the upper surface of the insert bar body toward the protruding side edge of the semi-tooth portion and slopes from above to below (equivalent to from the front side to the back side) in the vertical direction (equivalent to the thickness direction). The dimension (equivalent to thickness / depth) of the inclined portion in the vertical direction is larger than the amount by which the locking claw protrudes from the wing plate into the zipper tooth channel in the vertical direction. In this way, the insert bar protrusion can maintain a high contact area with the seat bar protrusion through the inclined portion with a large dimension (thickness), and can avoid the locking claw of the zipper head through the inclined portion with a large dimension (depth). Accordingly, the double-ended zipper of this invention can take into account the high contact area of ​​the insert bar protrusion and the seat bar protrusion while avoiding interference from the locking claw of the zipper head.

[0015] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a plan view of the front side of a double-ended zipper according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 The diagram shows the internal rear side of a double-ended zipper with the insert bar and seat bar of a pair of zipper teeth inserted into a pair of zipper pulls.

[0018] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of a double-ended zipper cut along section line I-I'.

[0019] Figure 4 yes Figure 1 A plan view of the front side of a pair of zipper teeth of a double-ended zipper shown;

[0020] Figure 5 yes Figure 1A plan view of the back side of a pair of zipper teeth of a double-ended zipper shown;

[0021] Figure 6 yes Figure 4 A three-dimensional schematic diagram of the front side of a zipper toothed strap with inserts shown;

[0022] Figure 7 yes Figure 5 A three-dimensional schematic diagram of the back side of a zipper toothed strap with inserts shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100: Double-ended zipper;

[0025] 110A, 110B: Zipper teeth and chain straps;

[0026] 112A, 112B: Zipper tape;

[0027] 114A, 114B: Chain teeth;

[0028] 116: Insert rod;

[0029] 116a: plunger body;

[0030] 116a1: Upper surface;

[0031] 116b: Insert protrusion;

[0032] 116b1: Half tooth portion;

[0033] 116b2: Inclined portion;

[0034] 116b3: Inclined surface;

[0035] 116c: Groove;

[0036] 116d: Platform Department;

[0037] 116e1: Prominent lateral edge;

[0038] 116e2: Connecting edges;

[0039] 116p1: Connecting part;

[0040] 116p2: Head;

[0041] 116r: Chamfer;

[0042] 116s1: First surface;

[0043] 116s2: Second surface;

[0044] 116s3: Turning point;

[0045] 118: Seat stick;

[0046] 118a: seat rod body;

[0047] 118b: Seat rod protrusion;

[0048] 119: Wing;

[0049] 120A, 120B: Pull tabs;

[0050] 122: Slider body;

[0051] 122a: Upper wing plate;

[0052] 122b: Lower wingplate;

[0053] 122c: Guide post;

[0054] 124: Chain tooth channel;

[0055] 126: Locking claw;

[0056] D1, D2, D3, L1, L2: Dimensions;

[0057] T: Protrusion amount;

[0058] X: Forward / backward direction;

[0059] Y: Left and right directions;

[0060] Z: Up and down direction. Detailed Implementation

[0061] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In particular, Figure 1 This is a plan view of the front side of a double-ended zipper according to an embodiment of the present invention. Figure 2 yes Figure 1 The diagram shown is an internal view of the back side of a double-ended zipper with the zipper teeth and insert bar inserted into a pair of zipper pulls. Figure 3 yes Figure 1 The diagram shown is a cross-sectional view of a double-ended zipper cut along section line I-I'. Figure 4 yes Figure 1 The diagram shown is a front-side plan view of a pair of zipper teeth of a double-ended zipper. Figure 5 yes Figure 1 The diagram shows a plan view of the back side of a pair of zipper teeth of a double-ended zipper. Figure 6 yes Figure 4 The diagram shown is a three-dimensional view of the front side of a zipper toothed strap with inserts. Figure 7 yes Figure 5The diagram shows a three-dimensional view of the back side of a zipper pull with inserts. The following will use... Figures 1 to 7 This invention describes the specific structure and operation of the double-ended zipper 100 in an embodiment of the present invention, but the present invention is not limited thereto.

[0062] Please refer to Figure 1 and Figure 2 In this embodiment, the double-ended zipper 100 includes a pair of zipper teeth 110A and 110B, and a pair of zipper pulls 120A and 120B. The pair of zipper teeth 110A and 110B includes a pair of zipper strips 112A and 112B extending in the longitudinal direction X (corresponding to the length direction) and facing each other in the lateral direction Y (corresponding to the width direction); a pair of chain teeth 114A and 114B arranged along the longitudinal direction X on the pair of zipper strips 112A and 112B and capable of engaging or disengaging with each other; and inserts 116 and seats 118 respectively disposed at the rear ends of the pair of zipper strips 112A and 112B. The pair of chain teeth 114A and 114B are, for example, disposed on the back side of the pair of zipper strips 112A and 112B. Insert rod 116 and seat rod 118 are respectively disposed at the ends of a pair of zipper straps 112A and 112B via outer flaps 119, and are disposed on the side edges of the pair of zipper straps 112A and 112B on the front and back sides (e.g.) Figure 1 and Figure 2 (As shown).

[0063] Furthermore, in this embodiment, as Figure 1 and Figure 2 As shown, a pair of zipper pulls 120A and 120B are mounted on a pair of zipper teeth 110A and 110B with their tails facing each other. They can slide along the zipper teeth 110A and 110B in the forward-backward direction X, respectively, using the forward and rearward directions X as the opening directions. Here, the tail refers to the end of the zipper pull body 122 of each zipper pull 120A and 120B that does not have a guide post. Specifically, the end positioned in the forward-backward direction X (i.e., the front end)... Figure 1 and Figure 2 The pull head 120A (on the upper side) can face backward (i.e., Figure 1 and Figure 2The zipper pull 120B, located at the rear in the front-to-back direction X, slides forward to open a pair of zipper teeth 110A and 110B (i.e., with the rear as the opening direction), and can also slide forward to open the pair of zipper teeth 110A and 110B (i.e., with the front as the opening direction). Thus, zipper pull 120A can open the front side of the pair of zipper teeth 110A and 110B, and zipper pull 120B can open the rear side of the pair of zipper teeth 110A and 110B, thereby forming a double-ended zipper 100 (i.e., the pair of zipper pulls 120A and 120B can open the pair of zipper teeth 110A and 110B from both the front and rear sides).

[0064] Therefore, in this embodiment, as Figure 1 and Figure 2 As shown, when a pair of zipper pulls 120A and 120B are located at the rear ends of a pair of zipper tapes 112A and 112B (i.e., adjacent to the insert bar 116 and the base bar 118) and are adjacent to each other in the front-rear direction X, the insert bar 116 and the base bar 118 can be inserted into or pulled out of the pair of zipper pulls 120A and 120B. Specifically, each pair of zipper pulls 120A and 120B has a zipper pull body 122 and a locking claw 126 protruding from the wing plate (e.g., the upper wing plate 122a) of the zipper pull body 122 into a tooth channel 124. The zipper pull body 122 includes an upper wing plate 122a and a lower wing plate 122b that are opposite each other, and a guide post 122c disposed between the upper wing plate 122a and the lower wing plate 122b, and the tooth channel 124 is formed between the upper wing plate 122a and the lower wing plate 122b. in, Figure 2 A portion of the slider body 122 of each of the pair of sliders 120A and 120B (e.g., the lower wing plate 122b) is omitted to illustrate the relative positions of the pair of chain teeth 114A and 114B passing through the pair of sliders 120A and 120B, as well as the insert bar 116 and the seat bar 118. Furthermore, the locking claw 126 of each of the sliders 120A and 120B can be operated by being moved (retracted) towards the wing plate of the slider body 122 by a pull tab (not shown) while the sliders 120A and 120B slide, and then moved (protruded / inserted) towards the chain tooth channel 124 when the sliders 120A and 120B slide to a fixed point and the pull tab is released. This invention does not limit the operation of the locking claw 126; it can be adjusted according to requirements.

[0065] With the above settings, in this embodiment, the pair of sliders 120A and 120B are positioned rearwards (i.e., Figure 2When the bottom side of the zipper pulls 110A and 112B slides to the rear end of the pair of zipper tapes 112A and 112B, the insert bar 116 and the seat bar 118 can be inserted into the zipper tooth channels 124 of each of the pair of zipper pulls 120A and 120B (e.g., the bottom side of the zipper pulls 110A and 120B Figure 2 As shown). Correspondingly, the pair of pull heads 120A and 120B each move forward (i.e., Figure 2 When the upper side of the zipper pulls 110A and 112B slides away from the rear ends of the pair of zipper pulls 112A and 112B, the insert bar 116 and the seat bar 118 can be pulled out from the zipper tooth channels 124 of the pair of zipper pulls 120A and 120B respectively, and the pair of zipper tooth rows 114A and 114B pass through the zipper tooth channels 124 of the pair of zipper pulls 120A and 120B respectively, so that the pair of zipper pulls 120A and 120B can slide on the pair of zipper tooth zipper pulls 110A and 110B to open or close the pair of zipper tooth zipper pulls 110A and 110B. During the sliding process of each pair of zipper pulls 120A and 120B, the locking claws 126 of each pair of zipper pulls 120A and 120B protrude toward the chain tooth channel 124 (for example, when the zipper pulls 120A and 120B slide to a fixed point and release the pull tab, they move / insert into the chain tooth channel 124). This may cause the zipper pulls 120A and 120B to protrude toward the insert bar 116 and the base bar 118 as they pass through the insert bar 116 and the base bar 118. Therefore, the double-ended zipper 100 of this embodiment improves the structure of the insert bar 116 to avoid collision between the locking claws 126 and the insert bar 116, which extends further forward than the base bar 118 in the front-rear direction X.

[0066] In detail, in this embodiment, such as Figures 2 to 5 As shown, the insert rod 116 has an insert rod body 116a, an insert rod protrusion 116b protruding from the insert rod body 116a toward the base rod 118, and a groove 116c located at the rear end of the insert rod protrusion 116b. The base rod 118 has a base rod body 118a, and a base rod protrusion 118b protruding from the base rod body 118a toward the insert rod 116 and engaging with the groove 116c. As an example, the insert rod body 116a and the base rod body 118a are, for example, a pair of rod-shaped structures that extend generally in the front-rear direction X (corresponding to the length direction) and are arranged side by side in the left-right direction Y (corresponding to the width direction). Furthermore, the insertion protrusion 116b and the seat protrusion 118b extend in opposite directions and are located between the insertion body 116a and the seat body 118a, and are offset in the front-rear direction X, so that the seat protrusion 118b can engage with the groove 116c located at the rear end of the insertion protrusion 116b (e.g., Figure 4 and Figure 5 (As shown).

[0067] Furthermore, in this embodiment, as Figures 3 to 7As shown, the insertion protrusion 116b has a semi-toothed portion 116b1 and an inclined portion 116b2 located on the upper side (i.e., the front side) of the semi-toothed portion 116b1. That is, the front side of the insertion protrusion 116b (as shown) Figure 4 and Figure 6 As shown) an inclined portion 116b2 is formed on the back side (as shown) Figure 5 and Figure 7 As shown, the semi-tooth portion 116b1 is formed with a different shape, and the semi-tooth portion 116b1 and the inclined portion 116b2 are integrally formed into the insert protrusion 116b in the vertical direction Z (corresponding to the thickness direction). In this way, the semi-tooth portion 116b1 of the insert protrusion 116b can correspond to the chain teeth of the chain tooth row 114B near the base bar 118 on the back side (as shown). Figure 5 As shown), and the inclined portion 116b2 of the insert protrusion 116b can contact the seat protrusion 118b on the front side (as shown). Figure 3 and Figure 4 (As shown).

[0068] Therefore, in this embodiment, as Figure 3 , Figure 4 ,and Figure 6 As shown, the inclined portion 116b2 has an inclined surface 116b3 that slopes from the upper surface 116a1 of the insert body 116a (i.e., the surface on the front side, corresponding to the upper side in the vertical direction Z) toward the protruding side edge 116e1 of the half-tooth portion 116b1 and slopes from the upper side to the lower side (corresponding to the front side to the back side) in the vertical direction Z (corresponding to the thickness direction). The dimension D1 (corresponding to thickness / depth) of the inclined portion 116b2 in the vertical direction Z is greater than the protrusion T of the locking pawl 126 protruding from the wing plate (e.g., the upper wing plate 122a) into the chain tooth channel 124 in the vertical direction Z. When there is a gap between the topmost surface of the inclined portion 116b2 (i.e., the uppermost surface in the vertical direction Z) and the bottommost surface of the wing plate (e.g., the uppermost surface in the vertical direction Z) (i.e., the lowermost surface in the vertical direction Z), (e.g.) Figure 3 As shown), the dimension D1 of the inclined portion 116b2 in the vertical direction Z is not limited to the distance between the bottom surface of the inclined portion 116b2 (i.e., the lowest surface in the vertical direction Z) and the top surface of the inclined portion 116b2, but can also refer to the distance between the bottom surface of the inclined portion 116b2 and the bottom surface of the wing plate (e.g., the upper wing plate 122a). Correspondingly, the protrusion T of the locking pawl 126 can refer to the distance between the bottom surface of the locking pawl 126 (i.e., the lowest surface in the vertical direction Z) and the bottom surface of the wing plate (e.g., the upper wing plate 122a). That is, the dimension D1 of the inclined portion 116b and the protrusion T of the locking pawl 126 can be set with the bottom surface of the wing plate (e.g., the upper wing plate 122a) as the same reference. Thus, as Figure 3As shown, the insertion rod protrusion 116b can maintain a high contact area with the base rod protrusion 118b through the inclined portion 116b2 with a large dimension D1 (thickness), and can avoid the locking claws 126 of the zipper heads 120A and 120B through the inclined portion 116b2 with a large dimension D1 (depth). Accordingly, the double-ended zipper 100 can balance the high contact area between the insertion rod protrusion 116b and the base rod protrusion 118b with avoiding interference from the locking claws 126 of the zipper heads 120A and 120B.

[0069] Furthermore, in this embodiment, as Figure 3 and Figure 6 As shown, the inclined surface 116b3 of the inclined portion 116b2 includes a curved surface. As an example, the inclined surface 116b3 of the inclined portion 116b2 includes a first curved surface 116s1 and a second curved surface 116s2 connected to each other, and the curvature (e.g., radius of curvature) of the first curved surface 116s1 is different from the curvature (e.g., radius of curvature) of the second curved surface 116s2. Therefore, as... Figure 3 As shown, the inclined surface 116b3 forms an outwardly protruding turning point 116s3 between the inwardly concave first curved surface 116s1 and the second curved surface 116s2. Thus, the inclined surface 116b3 can avoid interference from the locking claws 126 of the sliders 120A and 120B through the concavity of the second curved surface 116s2, which is closer to the protruding side edge 116e1 of the half-tooth portion 116b1, and can increase the contact area between the insert protrusion 116b and the seat protrusion 118b through the protrusion of the turning point 116s3 formed between the first curved surface 116s1 and the second curved surface 116s2. However, in other embodiments not shown, the inclined surface 116b3 of the inclined portion 116b2 may also include a single curved surface, or it may include multiple planes facing different directions and connected to each other. This invention is not limited to this and can be adjusted according to requirements.

[0070] Therefore, in this embodiment, as Figure 3 and Figure 6As shown, the connecting edge 116e2 of the inclined portion 116b2, which connects to the semi-tooth portion 116b1, is spaced apart from the protruding side edge 116e1 of the semi-tooth portion 116b1, so that a platform portion 116d is formed on the upper side (i.e., the front side) of the semi-tooth portion 116b1. In other words, the inclined portion 116b2 extends from the upper surface 116a1 of the insert body 116a toward the protruding side edge 116e1 of the semi-tooth portion 116b1, but does not contact the protruding side edge 116e1. Therefore, the connecting edge 116e2 of the inclined portion 116b2 retracts inward relative to the protruding side edge 116e1, and a platform portion 116d is formed on the upper side of the semi-tooth portion 116b1. Thus, the inclined portion 116b2 is offset further toward the insert body 116a than the semi-tooth portion 116b1, thereby avoiding interference from the locking claws 126 of the pull heads 120A and 120B. Furthermore, as... Figure 3 As shown, the dimension D1 (equivalent to thickness / depth) of the inclined portion 116b2 in the vertical direction Z is larger than the dimension D2 (equivalent to thickness) of the half-tooth portion 116b1 in the vertical direction Z, thereby allowing the inclined portion 116b2 to further avoid interference from the locking claws 126 of the sliders 120A and 120B. Furthermore, the dimension D3 (equivalent to thickness) of the base protrusion 118b in the vertical direction Z is equal to the sum of the dimension D1 of the inclined portion 116b2 and the dimension D2 of the half-tooth portion 116b1 in the vertical direction Z, thereby increasing the contact area between the base protrusion 118b and the insert protrusion 116b.

[0071] However, in other embodiments not shown, the inclined portion 116b2 may further extend to the protruding side edge 116e1 of the semi-tooth portion 116b1 (i.e., the connecting edge 116e2 of the inclined portion 116b2 contacts the protruding side edge 116e1), thus omitting the platform portion 116d. Similarly, the inclined portion 116b2 is not limited to extending from the upper surface 116a1 of the insert body 116a, but may be spaced apart from the upper surface 116a1 of the insert body 116a, and extend obliquely from a portion of the side wall of the insert body 116a that is lower than the upper surface 116a1 toward the protruding side edge 116e1 of the semi-tooth portion 116b1. Furthermore, the dimension D1 of the inclined portion 116b2 in the vertical direction Z is not necessarily larger than the dimension D2 of the half-tooth portion 116b1 in the vertical direction Z, and the dimension D3 of the seat rod protrusion 118b in the vertical direction Z is not necessarily equal to the dimension of the insertion rod protrusion 116b in the vertical direction Z (i.e., the sum of the dimension D1 of the inclined portion 116b2 and the dimension D2 of the half-tooth portion 116b1). It is acceptable as long as the inclined surface 116b3 of the inclined portion 116b2 slopes from the upper surface 116a1 of the insertion rod body 116a towards the protruding side edge 116e1 of the half-tooth portion 116b1 and from top to bottom, and the dimension D1 of the inclined portion 116b2 is larger than the protrusion T of the locking pawl 126. The specific structures of the half-tooth portion 116b1, the inclined portion 116b2, and the inclined surface 116b3 of the insertion rod protrusion 116b can be adjusted as needed, and this utility model is not limited thereto.

[0072] Additionally, in this embodiment, as Figure 6 and Figure 7 As shown, the semi-tooth portion 116b1 includes a connecting portion 116p1 connected to the insert body 116a, and a head 116p2 protruding forward from the front end of the connecting portion 116p1 (towards the chain tooth row 114A). The dimension L1 (equivalent to length) of the inclined portion 116b2 in the front-rear direction X does not exceed the dimension L2 (equivalent to length) of the connecting portion 116p1 in the front-rear direction X. That is, the front end of the inclined portion 116b2 (towards the chain tooth row 114B) does not extend beyond the front end of the connecting portion 116p1 in the front-rear direction X, thus ensuring that the semi-tooth portion 116b1 is in a position when viewed from the rear side (e.g., Figure 7 As shown, the inclined portion 116b2 is hidden within the half-tooth portion 116b1 and does not protrude between the connecting portion 116p1 and the head 116p2 of the half-tooth portion 116b1. In this way, the arrangement of the inclined portion 116b2 does not interfere with the interlocking action between the half-tooth portion 116b1 and the teeth of the opposing chain tooth row 114B.

[0073] Furthermore, in this embodiment, such as Figure 6As shown, the front edge of the inclined portion 116b2 in the front-rear direction X (the end edge facing the chain teeth 114A) has a chamfer 116r. Therefore, when the zipper pulls 120A and 120B slide on the zipper chain tapes 110A and 110B and pass through the insert bar 116 (the insert bar 116 is inserted into the zipper pulls 120A and 120B), even if the insert bar 116 and the base bar 118 are not fully engaged during operation (e.g., ... Figure 2 In the state shown, the locking claws 126 of the pull tabs 120A and 120B unintentionally contact the front edge of the inclined portion 116b2 of the insertion protrusion 116b of the insertion rod 116, and the locking claws 126 are not easily damaged by contacting the front edge of the inclined portion 116b2 with a chamfer 116r. That is, the chamfer 116r can prevent the locking claws 126 from breaking due to contact with the front edge of the inclined portion 116b2. However, in other embodiments not shown, the chamfer 116r can be omitted, as long as the dimension D1 (equivalent to thickness / depth) of the inclined portion 116b2 is larger than the protrusion T of the locking claws 126. Furthermore, when the zipper pulls 120A and 120B slide off the zipper teeth 110A and 110B and disengage from the insert bar 116 (the insert bar 116 is pulled out from the zipper pulls 120A and 120B), the insert bar 116 and the base bar 118 are engaged. Therefore, there is no concern that the locking claws 126 of the zipper pulls 120A and 120B might unintentionally contact the rear end edge of the inclined portion 116b2 of the insert bar protrusion 116b of the insert bar 116. Thus, no chamfer is provided at the rear end edge of the inclined portion 116b2. However, in other embodiments not shown, a chamfer may be provided at the rear end edge of the inclined portion 116b2. This invention is not limited to this and can be adjusted as needed.

[0074] In summary, in the double-ended zipper of this invention, the insert bar has an insert bar body, an insert bar protrusion protruding from the insert bar body, and a groove located at the rear end of the insert bar protrusion. The seat bar has a seat bar body and a seat bar protrusion protruding from the seat bar body and engaging with the groove. The insert bar protrusion has a semi-tooth portion and an inclined portion located on the upper side (i.e., the front side) of the semi-tooth portion. The inclined portion has an inclined surface that slopes from the upper surface of the insert bar body toward the protruding side edge of the semi-tooth portion and slopes from above to below (equivalent to from the front side to the back side) in the vertical direction (equivalent to the thickness direction). The dimension (equivalent to thickness / depth) of the inclined portion in the vertical direction is larger than the amount by which the locking claw protrudes from the wing plate into the zipper tooth channel in the vertical direction. Thus, the insert bar protrusion can maintain a high contact area with the seat bar protrusion through the inclined portion with a large dimension (thickness), and can avoid the locking claw of the zipper head through the inclined portion with a large dimension (depth). Preferably, the inclined surface of the inclined portion includes a curved surface, such as a first curved surface and a second curved surface that are connected to each other and have different curvatures, thereby further increasing the high contact area between the insert protrusion and the seat protrusion. Accordingly, the double-ended zipper of this invention can achieve both a high contact area between the insert protrusion and the seat protrusion and avoid interference from the locking claw of the zipper head.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-ended zipper (100), characterized in that, include: A pair of zipper belts (110A, 110B) includes a pair of zipper belts (112A, 112B) extending in the front-rear direction (X) and facing each other in the left-right direction (Y); a pair of chain teeth (114A, 114B) arranged along the front-rear direction (X) on the pair of zipper belts (112A, 112B) and capable of engaging or disengaging with each other; and a pusher (116) and a seat bar (118) respectively disposed at the rear ends of the pair of zipper belts (112A, 112B); and A pair of zipper pulls (120A, 120B) are positioned with their tails facing each other on the pair of zipper teeth (110A, 110B), and can slide along the zipper teeth (110A, 110B) in the front-to-back direction (X) as the opening direction of the pair of zipper teeth (110A, 110B), respectively. When the pair of zipper pulls (120A, 120B) are located at the rear ends of the pair of zipper tapes (112A, 112B) and are adjacent to each other in the front-rear direction (X), the insert (116) and the seat (118) can be inserted into or pulled out of the pair of zipper pulls (120A, 120B). The pair of zipper pulls (120A, 120B) each have a zipper pull body (122) and a locking claw (126) protruding from the wing plate of the zipper pull body (122) into the chain tooth channel (124). The insertion rod (116) has an insertion rod body (116a), an insertion rod protrusion (116b) protruding from the insertion rod body (116a) toward the seat rod (118), and a groove (116c) located at the rear end of the insertion rod protrusion (116b). The base rod (118) has a base rod body (118a) and a base rod protrusion (118b) that protrudes from the base rod body (118a) toward the insert rod (116) and engages with the groove (116c). The insertion rod protrusion (116b) has a semi-toothed portion (116b1) and an inclined portion (116b2) located on the upper side of the semi-toothed portion (116b1). The inclined portion (116b2) has a protruding side edge (116e1) extending from the upper surface (116a1) of the insert body (116a) toward the semi-tooth portion (116b1) and an inclined surface (116b3) inclined downward in the vertical direction (Z). The size of the inclined portion (116b2) in the vertical direction (Z) is greater than the amount (T) by which the locking claw (126) protrudes from the wing plate into the chain tooth channel (124) in the vertical direction (Z).

2. The double-ended zipper (100) according to claim 1, characterized in that, The inclined surface (116b3) of the inclined portion (116b2) includes a curved surface.

3. The double-ended zipper (100) according to claim 2, characterized in that, The inclined surface (116b3) of the inclined portion (116b2) includes a first curved surface (116s1) and a second curved surface (116s2) connected to each other, and The curvature of the first surface (116s1) is different from that of the second surface (116s2).

4. The double-ended zipper (100) according to any one of claims 1 to 3, characterized in that, The semi-toothed portion (116b1) includes a connecting portion (116p1) connected to the insert body (116a), and a head (116p2) protruding forward from the front end of the connecting portion (116p1). The size of the inclined portion (116b2) in the front-rear direction (X) does not exceed the size of the connecting portion (116p1) in the front-rear direction (X).

5. The double-ended zipper (100) according to any one of claims 1 to 3, characterized in that, The inclined portion (116b2) has a chamfer (116r) at its front end edge in the front-rear direction (X).

6. The double-ended zipper (100) according to any one of claims 1 to 3, characterized in that, The dimension of the seat protrusion (118b) in the vertical direction (Z) is equal to the dimension of the insert protrusion (116b) in the vertical direction (Z).

7. The double-ended zipper (100) according to any one of claims 1 to 3, characterized in that, The inclined portion (116b2) is larger in the vertical direction (Z) than the half-tooth portion (116b1) is larger in the vertical direction (Z).

8. The double-ended zipper (100) according to any one of claims 1 to 3, characterized in that, The inclined portion (116b2) is spaced apart from the connecting edge (116e2) of the semi-tooth portion (116b1) and the protruding side edge (116e1) of the semi-tooth portion (116b1) to form a platform portion (116d) on the upper side of the semi-tooth portion (116b1).

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