A lower stop block and a plastic open zipper

Abstract

The application provides a lower stop block and a plastic open zipper. The lower stop block comprises a block body, the block body is formed with a plug chamber, the plug chamber has a plug end and a stop end, an arc-shaped groove is formed at one end of the stop end of the block body close to the plug chamber, and a convex-shaped supporting part is arranged in the plug chamber at a position corresponding to the arc-shaped groove. The application has the advantages that the convex-shaped supporting part and the arc-shaped groove are arranged, the plug displacement strength and the open-end flat pulling strength are effectively increased, the mechanical performance of the whole lower stop product is effectively improved, the lower stop block is not easy to be damaged in actual use, and the service life of the zipper is improved.

Description

[Technical Field]

[0001] This invention relates to the field of zipper technology, and in particular to a bottom stop block and a plastic opening zipper. [Background Technology]

[0002] Open zippers typically use a block and a pin as the bottom stop, and the zipper is positioned by inserting the pin into a pin hole on the block, so that the zipper pull can press the zipper teeth tightly to close the zipper. For example... Figure 1 and 2 As shown, existing bottom stop blocks 1' all use square straight cavities 11'. After the pin is inserted into the square straight cavity 11', the contact area between the zipper tape and the cavity wall of the square straight cavity 11' is small, and the outer sidewall 12' of the square straight cavity 11' is relatively thin, which reduces the maximum tensile force it can withstand. This results in weak socket displacement strength and tail-opening flat pulling strength of existing bottom stop blocks 1', leading to poor product mechanical properties and easy damage during use. In view of the above-mentioned problems, the inventors of this case conducted in-depth research on this problem, resulting in this case. [Summary of the Invention]

[0003] The technical problem to be solved by the present invention is to provide a bottom stop block and a plastic open zipper, which solves the problem that the existing bottom stop block adopts a square straight cavity, and after the pin is inserted into the square straight cavity, the contact area between the zipper tape and the cavity wall of the square straight cavity is small, and the outer side wall of the square straight cavity is relatively thin, which reduces the maximum tensile force that it can withstand. As a result, the existing bottom stop block has weak socket displacement strength and opening end flat pull strength, low product mechanical properties, and is easy to be damaged during use.

[0004] This invention is implemented as follows:

[0005] In a first aspect, a bottom stop block includes a block body, the block body forming a pin chamber, the pin chamber having a plug-in end and a stop end; the stop end of the block body has an arc-shaped groove formed at one end near the pin chamber, and the pin chamber has a protruding support portion at a position corresponding to the arc-shaped groove.

[0006] Furthermore, the protruding support portion includes a support ramp and a support platform formed sequentially from the inside to the outside, and the width a1 of the pin chamber at the position corresponding to the support platform is less than the width b1 at the position corresponding to the support ramp.

[0007] Furthermore, the block body is integrally molded by injection molding.

[0008] Furthermore, the arc-shaped groove is a circular arc-shaped groove, and the radius of the circular arc of the arc-shaped groove is 0.3 to 2.0 mm.

[0009] Furthermore, the angle α between the supporting slope and the horizontal line is 30° to 80°.

[0010] Furthermore, the length h2 of the protruding support portion along the length direction of the pin chamber is 12% to 30% of the total length h3 of the pin chamber; the length h1 of the support platform along the length direction of the pin chamber is 5% to 12% of the total length h3 of the pin chamber.

[0011] Furthermore, the distance a1 between the supporting platform and the inner wall of the pin chamber is 40% to 70% of the total width h5 of the pin chamber; the length difference h4 between the length of the supporting platform along the width direction of the pin chamber and the length of the supporting ramp along the width direction of the pin chamber is 15% to 40% of the total width h5 of the pin chamber.

[0012] Furthermore, the total width h5 of the pin chamber is 60% to 85% of the distance h6 between the inner wall of the pin chamber and the outer wall of the block body.

[0013] Furthermore, an arc-shaped groove is formed at the end of the block body that is away from the pin chamber.

[0014] Secondly, a plastic open zipper, the plastic open zipper using the aforementioned bottom stop block.

[0015] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved: The block body has an arc-shaped groove formed at the end near the pin chamber at its cut-off point, and a protruding support portion is provided in the pin chamber corresponding to the arc-shaped groove. The protruding support portion reduces the aperture of the pin chamber near the cut-off point, while increasing the wall length. This increases the contact area between the zipper tape and the chamber wall after the pin is inserted, thus increasing the bonding force between the zipper tape and the block body, thereby increasing the socket displacement strength and the opening and pulling strength. The arc-shaped groove further enhances the block body's... The cut-off end of the body changes from a straight surface to a curved shape at the end near the pin chamber, increasing the overall rigidity and bending strength of the lower stop block. This further increases the displacement strength of the socket and the pulling strength of the open end. In addition, during actual use, when the zipper is pulled outward, the protruding support part can interact with the pin and cause the arc-shaped groove to deform and absorb energy, reducing stress. In this way, the side wall of the pin chamber can withstand greater forces. Therefore, by adopting the above-mentioned technical solution of the present invention, the mechanical properties of the entire lower stop product can be effectively improved, making the lower stop block less prone to damage during actual use, thereby helping to extend the service life of the zipper. [Attached Image Description]

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a 3D diagram of the bottom stop block of an existing open zipper;

[0018] Figure 2 This is a cross-sectional view of the bottom stop block of an existing open zipper;

[0019] Figure 3 This is a perspective view of the lower stop block of the present invention;

[0020] Figure 4 This is a front view of the lower stop block of the present invention;

[0021] Figure 5 This is a cross-sectional view of the lower stop block of the present invention;

[0022] Figure 6 This is a schematic diagram of the dimension markings involved in the lower stop block of the present invention.

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

[0024] There is a bottom stop block 1', a square straight cavity 11', and a side wall 12';

[0025] Lower stop block 100;

[0026] Block body 1, make way for opening 11;

[0027] Insertion chamber 2, insertion / removal end 21, cut-off end 22, side wall 23;

[0028] 3. Arc-shaped groove;

[0029] The raised support part 4, the supporting slope 41, and the supporting platform 42.

Detailed Implementation Methods

[0030] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] 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.

[0032] The overall concept of the technical solution in this application embodiment is as follows: The original square straight cavity structure of the lower stop block is changed. An arc-shaped groove is formed at the end of the block body near the pin chamber, and a protruding support is provided in the pin chamber corresponding to the arc-shaped groove. Due to the protruding support, the aperture of the pin chamber near the stop end becomes smaller, and the wall length increases accordingly. This increases the contact area between the zipper tape and the cavity wall of the pin chamber after the pin is inserted, thus increasing the bonding force between the zipper tape and the block body, thereby increasing the socket displacement strength and the opening and pulling strength. Simultaneously, the arc-shaped groove changes the straight end of the block body near the pin chamber from a straight surface to a curved shape, increasing the overall rigidity and bending strength of the lower stop block, which further increases the socket displacement strength and the opening and pulling strength. Among them, the socket displacement strength (box slippage strength) refers to the ultimate force that pulls the socket longitudinally off the chain and causes damage; the chain crosswise strength (o / e chain crosswise strength) refers to the ultimate force that is applied laterally to the open end of the chain and causes it to be pulled apart and damaged.

[0033] Example 1

[0034] Please see Figures 3 to 6 As shown, the present invention provides a lower stop block 100, which includes a block body 1. The block body 1 forms a pin chamber 2 for accommodating a pin. The pin chamber 2 has an insertion end 21 and a cut-off end 22. The cut-off end 22 is the end of the pin chamber 2 away from the insertion end 21. In use, the pin is inserted into the pin chamber 2 through the insertion end 21 or pulled out from the insertion end 21. The cut-off end 22 of the block body 1 has an arc-shaped groove 3 formed at one end near the pin chamber 2. The pin chamber 2 has a protruding support portion 4 at a position corresponding to the arc-shaped groove 3.

[0035] This invention designs an arc-shaped groove 3 at the end of the block body 1 near the pin chamber 2, while a raised support 4 is provided in the pin chamber 2 corresponding to the arc-shaped groove 3. The raised support 4 reduces the diameter of the pin chamber 2 near the end of the block body 1, while increasing the wall length at this location. This increases the contact area between the zipper tape and the wall of the pin chamber 2 after the pin is inserted, thus increasing the bonding force between the zipper tape and the block body 1, thereby increasing the socket displacement strength and the opening and pulling strength. The arc-shaped groove 3 ensures that the end of the block body 1 near the end of the block body 1... The end of the near-pin chamber 2 changes from a straight surface to a curved shape, increasing the overall rigidity and bending strength of the lower stop block 100. This further increases the displacement strength of the socket and the pulling strength of the opening end. In addition, during actual use, when the zipper is pulled outward, the protruding support part 4 can interact with the pin and cause the arc-shaped groove 3 to deform and absorb energy, reducing stress. In this way, the side wall 23 of the pin chamber 2 can withstand greater forces. Therefore, by adopting the above-mentioned technical solution of the present invention, the mechanical properties of the entire lower stop product can be effectively improved, making the lower stop block 100 less prone to damage during actual use, thereby helping to extend the service life of the zipper.

[0036] In a preferred embodiment of the present invention, the protruding support portion 4 includes a support ramp 41 and a support platform 42 formed sequentially from the inside to the outside. The design of the support ramp 41 can further increase the contact area between the zipper tape and the cavity wall of the pin chamber 2, and the width a1 of the pin chamber 2 at the position corresponding to the support platform 42 is smaller than the width b1 at the position corresponding to the support ramp 41. In a specific implementation of the present invention, the lowest point of the arc-shaped groove 3 is aligned with the middle position of the support ramp 41, which can better improve the overall rigidity and bending strength of the lower stop block 100, and make the arc-shaped groove 3 more deformable under the action of the pin when the zipper is pulled outward; at the same time, since the width a1 of the pin chamber 2 at the position corresponding to the support platform 42 is smaller than the width b1 at the position corresponding to the support ramp 41, it can strengthen the side wall 23 of the pin chamber 2.

[0037] In a preferred embodiment of the present invention, the block body 1 is integrally formed by injection molding, specifically by injection molding of plastic. Because plastic has a certain elasticity, the bottom stop block 100 after molding has a certain elasticity. Thus, in actual use, when the zipper is pulled outward along the width direction, the pin will apply an outward force to the protruding support part 4. Since an arc-shaped groove 3 is formed on the outer side of the corresponding protruding support part 4 on the block body 1, when the force is transmitted to the arc-shaped groove 3, the arc-shaped groove 3 can deform and absorb energy, thereby effectively improving the mechanical properties of the bottom stop block 100.

[0038] In a preferred embodiment of the present invention, in order to enable the arc-shaped groove 3 to better deform and absorb energy, thereby improving bending strength, and to ensure that the sidewall 23 of the pin chamber 2 is not too thin at the location of the arc-shaped groove 3, the arc-shaped groove 3 is a circular arc-shaped groove, and the radius of the circular arc of the arc-shaped groove 3 is 0.3 to 2.0 mm. In specific implementations of the present invention, the radius of the circular arc of the arc-shaped groove 3 can be flexibly set according to different specifications of the lower stop block 100 products.

[0039] In a preferred embodiment of the present invention, the angle α between the supporting slope 41 and the horizontal line is 30° to 80°.

[0040] In a preferred embodiment of the present invention, the angle α between the supporting slope 41 and the horizontal line is 50° to 65°.

[0041] In a preferred embodiment of the present invention, the length h2 of the protruding support portion 4 along the length direction of the pin chamber 2 is 12% to 30% of the total length h3 of the pin chamber 2, so as to ensure that the protruding support portion 4 does not affect the normal insertion of the pin. In another preferred embodiment of the present invention, the length h2 of the protruding support portion 4 along the length direction of the pin chamber 2 is 15% to 20% of the total length h3 of the pin chamber 2.

[0042] The length h1 of the supporting platform 42 along the length direction of the pin chamber 2 is 5% to 12% of the total length h3 of the pin chamber 2.

[0043] In a preferred embodiment of the present invention, the distance a1 between the supporting platform 42 and the inner wall of the pin chamber 2 is 40% to 70% of the total width h5 of the pin chamber 2, ensuring that the pin can be inserted and removed. In another preferred embodiment of the present invention, the distance a1 between the supporting platform 42 and the inner wall of the pin chamber 2 is 55% to 60% of the total width h5 of the pin chamber 2.

[0044] The length difference h4 between the length of the supporting platform 42 along the width direction of the pin chamber 2 and the length of the supporting ramp 41 along the width direction of the pin chamber 2 is 15% to 40% of the total width h5 of the pin chamber 2. In a preferred embodiment of the invention, the length difference h4 between the length of the supporting platform 42 along the width direction of the pin chamber 2 and the length of the supporting ramp 41 along the width direction of the pin chamber 2 is 20% to 30% of the total width h5 of the pin chamber 2.

[0045] In a preferred embodiment of the present invention, the total width h5 of the pin chamber 11 is 60% to 85% of the distance h6 between the inner wall of the pin chamber 11 and the outer wall of the block body 1. In another preferred embodiment, the total width h5 of the pin chamber 11 is 68% to 76% of the distance h6 between the inner wall of the pin chamber 11 and the outer wall of the block body 1.

[0046] In a preferred embodiment of the present invention, an arc-shaped groove 3 is formed at the end of the block body 1 at the end furthest from the pin chamber 2, that is, arc-shaped grooves 3 are formed at both ends of the block body 1 at the end of the end 22, which makes the entire lower stop block 100 product more aesthetically pleasing.

[0047] In a preferred embodiment of the present invention, a clearance opening 11 communicating with the pin chamber 11 is provided on the outer side of the block body 1, so that when the pin is inserted into the pin chamber 11, the clearance opening 11 can make way for the cloth tape connecting the pin; one end of the clearance opening 11 extends to the insertion end 21, and the other end of the clearance opening 11 extends to the position adjacent to the protruding support portion 4.

[0048] Example 2

[0049] Please see Figures 3 to 6 As shown, a preferred embodiment of the plastic open zipper of the present invention includes a bottom stop block 100. The specific structure of the bottom stop block 100 is described in detail in Embodiment 1 and will not be repeated here. By applying the bottom stop block 100 to the plastic open zipper, the socket displacement strength and the opening and pulling strength are effectively increased during use. Furthermore, when the plastic open zipper is pulled outwards along its width, the protruding support portion 4 in the bottom stop block 100 interacts with the pin and causes the arc-shaped groove 3 to deform and absorb energy. Therefore, the mechanical properties of the bottom stop block 100 are effectively improved, making it less prone to damage during actual use, thereby extending the service life of the plastic open zipper.

[0050] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A bottom-stop block, comprising a block body, the block body forming a pin chamber, the pin chamber having a plug-in end and a stop end; characterized in that: The block body has an arc-shaped groove at one end near the pin chamber. The pin chamber has a raised support at the position corresponding to the arc-shaped groove. The raised support includes a support ramp and a support platform formed sequentially from the inside to the outside. The lowest point of the arc-shaped groove is aligned with the middle position of the support ramp.

2. A bottom stop block as described in claim 1, characterized in that: The width a1 of the pin chamber at the location corresponding to the support platform is smaller than the width b1 at the location corresponding to the support ramp.

3. A bottom stop block as described in claim 1, characterized in that: The block body is integrally formed by injection molding.

4. A bottom stop block as described in claim 1, characterized in that: The arc-shaped groove is a circular arc-shaped groove, and the radius of the arc-shaped groove is 0.3~2.0mm.

5. A bottom stop block as described in claim 2, characterized in that: The angle α between the supporting slope and the horizontal line is 30°~80°.

6. A bottom stop block as described in claim 2, characterized in that: The length h2 of the protruding support portion along the length direction of the pin chamber is 12% to 30% of the total length h3 of the pin chamber; the length h1 of the support platform along the length direction of the pin chamber is 5% to 12% of the total length h3 of the pin chamber.

7. A bottom stop block as described in claim 2, characterized in that: The distance a1 between the supporting platform and the inner wall of the pin chamber is 40% to 70% of the total width h5 of the pin chamber; the length difference h4 between the length of the supporting platform along the width direction of the pin chamber and the length of the supporting ramp along the width direction of the pin chamber is 15% to 40% of the total width h5 of the pin chamber.

8. A bottom stop block as described in claim 1, characterized in that: The total width h5 of the pin chamber is 60% to 85% of the distance h6 between the inner wall of the pin chamber and the outer wall of the block body.

9. A bottom stop block as described in claim 1, characterized in that: An arc-shaped groove is formed at the end of the block body that is away from the pin chamber.

10. A plastic open zipper, characterized in that: The plastic open zipper uses the bottom stop block as described in any one of claims 1-9.

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