Double-opening zipper

Abstract

The utility model discloses a double-opening zipper which comprises a first puller, a second puller, a first zipper belt and a second zipper belt, the first zipper belt comprises a first zipper tooth row and a socket, the first zipper tooth row and the socket are sequentially arranged on the same straight line, the socket is arranged at the end of the first zipper belt, and the second zipper belt comprises a second zipper tooth row and a plug pin, the second zipper tooth row and the plug pin are sequentially arranged on the same straight line. The free end of the socket is a head end, the maximum thickness of the head end of the socket is b1, the other end of the socket is a tail end, the maximum thickness of the tail end of the socket is b2, one side, close to the socket, of the first pull head is an opening, the height of the opening of the first pull head is h1, one side, away from the socket, of the first pull head is a rear end, and the height of an inner cavity of the rear end of the first pull head is h2; and the socket and the first pull head meet the following conditions: h1 + d > b1 > h1 or h2 + d > b2 > h2, and 0.2 mm > d > 0.1 mm. The utility model has the advantage of better use experience.

Description

Technical Field

[0001] This utility model relates to zipper technology, and in particular to a double-opening zipper. Background Technology

[0002] In existing zipper products, to ensure smooth operation, the height of the zipper pull's inner cavity and the thickness of the zipper teeth are often designed with a gap fit. This fit is also applied to the fit between the zipper's top and bottom stops (including squares, pins, and double-opening zippers) and the zipper pull. In double-opening zippers, the bottom pull often uses a self-locking mechanism. However, when this type of pull is used, if the hem suddenly experiences significant tension and the force exceeds the pull's locking limit, the zipper teeth can be damaged, rendering the zipper unusable. To address this issue, a non-locking zipper pull is sometimes used. However, because the bottom pull lacks locking force, and the height of the pull and the thickness of the left and right openings are designed with a gap fit, the pull can easily slide upwards. This allows the hem to open easily even under slight tension, negatively impacting the user experience. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a double-opening zipper with a better user experience.

[0004] To achieve the above objectives, the solution of this utility model is:

[0005] A double-opening zipper includes a first zipper pull, a second zipper pull, a first zipper belt, and a second zipper belt. The first zipper belt includes a first row of chain teeth arranged sequentially along a straight line and a socket located at one end of the first zipper belt. The second zipper belt includes a second row of chain teeth arranged sequentially along a straight line and a pin. The first zipper pull and the second zipper pull are slidably disposed on the first zipper belt. The first zipper pull is a non-locking zipper pull, and the first zipper pull is positioned closer to the socket than the second zipper pull. The direction perpendicular to the plane containing the first zipper belt and the second zipper belt is defined as... In the thickness direction, the free end of the pin is the head end, and the maximum thickness of the head end of the pin is b1. The other end of the pin is the tail end, and the maximum thickness of the tail end of the pin is b2. The side of the first pull head closest to the socket is an opening, and the height of the opening of the first pull head is h1. The side of the first pull head furthest from the socket is the rear end, and the height of the inner cavity of the rear end of the first pull head is h2. The pin and the first pull head satisfy the following conditions: h1+d>b1>h1 or h2+d>b2>h2, 0.2mm>d>0.1mm.

[0006] Furthermore, a protrusion is provided on the tail end of the pin, and the thickness of the tail end of the pin corresponding to the protrusion is the maximum thickness b2.

[0007] Furthermore, the protrusions are provided on both sides of the pin in the thickness direction.

[0008] Furthermore, the protrusion is a frustum-shaped protrusion.

[0009] Furthermore, the protrusion is a sloping protrusion whose height gradually increases from the tail end to the head end.

[0010] Furthermore, a stop block is provided on the first end of the pin, and the thickness of the first end of the pin corresponding to the stop block is the maximum thickness b1.

[0011] Furthermore, the stop block is square in shape.

[0012] Furthermore, the stop is provided on both sides of the pin in the thickness direction.

[0013] With the above structure, the double-opening zipper proposed by this utility model has the following technical effects: the pin and the first zipper head meet the following conditions: h1+0.15mm>b1>h1 or h2+0.15mm>b2>h2, so that the first zipper head can be engaged and fixed with the first end or the tail end of the pin, which can prevent the first zipper head from shaking during use and provide a better user experience. Attached Figure Description

[0014] Figure 1 This is a partial perspective structural diagram of one embodiment of the double-opening zipper of this utility model;

[0015] Figure 2 This is a side perspective three-dimensional structural diagram of the first zipper head of a double-opening zipper according to one embodiment of the present invention;

[0016] Figure 3 This is a side view of the socket according to a first embodiment of the double-opening zipper of this utility model.

[0017] Figure 4 This is a left-side view of the socket and the first zipper pull in accordance with one embodiment of the double-opening zipper of this utility model.

[0018] Figure 5 This is a side view of the socket according to a second embodiment of the double-opening zipper of this utility model.

[0019] Figure 6 This is a left-side view of the socket and the first zipper head in a second embodiment of the double-opening zipper of this utility model.

[0020] Figure 7 This is a side view of the socket according to a third embodiment of the double-opening zipper of this utility model.

[0021] Figure 8This is a left-side view of the socket and the first zipper pull in accordance with the third embodiment of the double-opening zipper of this utility model.

[0022] In the figure: 1. First pull head, 2. First chain teeth, 3. Socket, 4. Second chain teeth, 5. Pin, 6. Support core, 7. Stop block, 8. Protrusion, h1. Height of the opening of the first pull head 1, h2. Height of the inner cavity at the rear end of the first pull head, b1. Maximum thickness at the beginning of the socket, b2. Maximum thickness at the end of the socket. Detailed Implementation

[0023] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0024] Implementation Method 1:

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The illustrated double-opening zipper includes a first zipper pull 1, a second zipper pull (not shown), a first zipper belt, and a second zipper belt. The first zipper belt includes a first set of chain teeth 2 and a socket 3 arranged sequentially on the same straight line. The first zipper belt also includes a first fabric strip. The first set of chain teeth 2 and the socket 3 are located on one side edge of the first fabric strip. The first fabric strip, the first set of chain teeth 2, and the socket 3 are located on the same plane. The second zipper belt includes a second set of chain teeth 4 and a pin 5 arranged sequentially on the same straight line. The second zipper belt also includes a second fabric strip. The second set of chain teeth 4 and the pin 5 are located on one side edge of the second fabric strip. The second fabric strip, the second set of chain teeth 4, and the pin 5 are located on the same plane. The first zipper pull 1 and the second zipper pull slide on the first zipper belt. Both the first and second fabric strips are conventional plastic steel zipper fabric strips. The first set of chain teeth 2 and the second set of chain teeth 4 are conventional plastic steel chain teeth. The first zipper pull 1 and the second zipper pull are conventional zipper pulls, which will not be described in detail here.

[0026] The first zipper 1 and the second zipper 1 are slidably disposed on the first chain belt. The first zipper 1 is a non-locking zipper, which is a zipper without a hook in conventional technology. The first zipper 1 is located between the second zipper 1 and the socket 3. Both the second zipper 1 and the first zipper 2 are provided with a support core 6. The support cores of the second zipper 1 and the first zipper 2 are arranged opposite to each other. Both the second zipper 1 and the first zipper 2 have an opening and an inner cavity. The opening is located on both sides of the support core. The inner cavity is used to accommodate the first chain belt and the second chain belt. The opening of the first zipper 1 is close to the socket 3. The end of the first zipper 1 away from the socket 3 is the rear end. The height of the opening of the first zipper 1 is h1, and the height of the inner cavity at the rear end of the first zipper 1 is h2.

[0027] Let the direction perpendicular to the plane where the first chain and the second chain are located be the thickness direction. The two sides of the socket 3 located in the thickness direction are the upper side and the lower side, respectively. The side where the socket 3 and the pin 5 face each other is the inner side. Both the upper side and the lower side are provided with a stop block 7 and a protrusion 8. Let the end where the pin 5 and the socket 3 are located be the rear, and the direction in which the first chain tooth row 2 and the second chain tooth row 4 extend is the front.

[0028] The stop block 7 is located on the outer edge of the tail of the pin 5. The stop block 7 is square in shape and is used to cooperate with the opening of the first pull head 1 to restrict the first pull head 1 from coming out of the socket 3.

[0029] In this embodiment, the thickness of the end of the socket 3 corresponding to the protrusion 8 is the maximum thickness b2 of the socket 3. b2 and h2 satisfy the following relationship: h2+d>b2>h2, where 0.2mm>d>0.1mm. This size design allows the first pull head 1 to have a moderate deformation after engaging with the socket 3, ensuring that the first pull head 1 can be firmly engaged with the socket 3 without getting stuck in the socket and unable to be pulled out.

[0030] Furthermore, as several alternative solutions, the protrusion 8 can be either a sloping protrusion whose height gradually increases from the tail end to the head end, or a frustum-shaped column that gradually narrows from the bottom to the end. In this embodiment, the protrusion 8 adopts the latter solution. Preferably, the frustum-shaped column is a frustum-shaped column that is narrow at the top and wide at the bottom.

[0031] This utility model has the following advantages:

[0032] When the first pull head 1 is engaged with the socket 3 and the opening of the first pull head 1 is fitted onto the stop block 7, the upper and lower surfaces of the protrusion 8 abut against the inner cavity of the tail of the first pull head 1. Since the maximum thickness of the protrusion 8 is higher than the height of the inner cavity of the first pull head 1, the protrusion 8 and the inner cavity of the first pull head 1 are interference-fitted to fix the first pull head 1 on the socket 3, thereby optimizing the user experience.

[0033] Implementation Method Two:

[0034] like Figure 5 and Figure 6 As shown, the difference between this embodiment and the first embodiment is that the protrusion 8 is only provided on one side of the socket 3.

[0035] Implementation Method 3:

[0036] like Figure 7 and Figure 8As shown, the difference between this embodiment and the first embodiment is that no protruding structure is provided on the tail end of the socket 3, and the thickness of the first end of the socket 3 corresponding to the stop block 7 is the maximum thickness b1. b1 and h1 satisfy the following relationship: h1+d>b1>h1, where 0.2mm>d>0.1mm. In the structure of this embodiment, the first pull head 1 is fixed mainly by the interference fit between the stop block 7 and the opening of the first pull head 1.

[0037] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0038] The above embodiments and accompanying drawings are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A two-way slide fastener characterized by: The zipper comprises a first puller, a second puller, a first chain and a second chain, the first chain comprises a first chain tooth row and a socket arranged in sequence on the same straight line at the end of the first chain, the second chain comprises a second chain tooth row and a plug arranged in sequence on the same straight line; the first puller and the second puller are arranged on the first chain in sliding mode, the first puller is a lockless puller, and the first puller is arranged closer to the socket than the second puller; The direction perpendicular to the plane where the first chain and the second chain are located is the thickness direction, the free end of the socket is the head end, the maximum thickness of the head end of the socket is b1, the other end of the socket is the tail end, the maximum thickness of the tail end of the socket is b2, the side of the first puller close to the socket is the opening, the height of the opening of the first puller is h1, the side of the first puller away from the socket is the rear end, the height of the inner cavity of the rear end of the first puller is h2, the socket and the first puller satisfy the following conditions: h1+d>b1>h1 or h2+d>b2>h2, 0.2mm>d>0.1mm.

2. A two-way slide fastener as defined in claim 1, wherein: The tail end of the socket is provided with a protrusion, and the thickness of the tail end of the socket corresponding to the protrusion is the maximum thickness b2.

3. A two-way slide fastener as claimed in claim 2, wherein: The protrusion is arranged on both sides of the thickness direction of the socket.

4. A dual opening slide fastener as defined in claim 2 wherein: The protrusion is arranged on one side of the thickness direction of the socket.

5. A two-way slide fastener according to claim 2 or 3, wherein: The protrusion is a circular truncated cone protrusion.

6. A two-way slide fastener according to claim 2 or 3, wherein: The protrusion is a slope protrusion with the height gradually increasing from the tail end to the head end.

7. A dual opening slide fastener as claimed in claim 1, wherein: The head end of the socket is provided with a stop block, and the thickness of the head end of the socket corresponding to the stop block is the maximum thickness b1.

8. A two-way slide fastener as claimed in claim 7, wherein: The stop block is in the shape of a square block.

9. A two-way slide fastener as claimed in claim 7, wherein: The stop block is arranged on both sides of the thickness direction of the socket.

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