Slide fastener head and slide fastener

Abstract

The utility model discloses a zipper head and a zipper with the zipper head. The zipper head comprises a zipper head body and a zipper pull, the zipper head body comprises a zipper head main body part and a zipper pull mounting part, the zipper head main body part comprises a lower wing plate, the zipper pull mounting part is located on the lower wing plate, and the zipper pull mounting part comprises an upper plate and a claw part located on the upper plate. The zipper pull is provided with a connecting part used for connecting the claw part of the zipper pull mounting part, the connecting part comprises two branch parts and a shaft part for connecting the two branch parts, and the zipper pull is characterized in that the front ends of the two branch parts are respectively provided with a protruding part which is integrally formed with the branch parts; the protruding direction of the protruding part is consistent with the extending direction of the forked part, the distance from the center of the shaft part to the edge of the front end of the protruding part is L, the distance from the center of the shaft part to an upper plate of the pull piece installation part is M, and L is smaller than M.

Description

Technical Field

[0001] This utility model relates to the field of zipper technology, specifically to a zipper head and a zipper having the zipper head. Background Technology

[0002] Zippers are ubiquitous in our daily lives and are among the most commonly used clothing accessories. The zipper pull, used for opening and closing zippers, is the most important component. Chinese Invention Patent 201610105490.0 discloses a zipper pull, comprising: a zipper pull body; a pull tab mounting portion disposed on the zipper pull body; and a resin pull tab mounted on the pull tab mounting portion. The pull tab includes a shaft portion and a pair of rod portions extending from each end of the shaft portion. The pull tab mounting portion includes a pair of claw portions that provide axial support to the shaft portion of the pull tab. Each claw portion is held by the pair of rod portions during pivot rotation of the pull tab. The width of the tip portion of each claw portion in the axial direction of the shaft portion is smaller than the width of the root portion of each claw portion in the axial direction.

[0003] Although the zipper pull described above ensures easy installation of the pull tab through a pair of claws and maintains a stable posture during the pivot rotation of the pull tab, allowing the pull tab of the zipper pull to be held at various angles, the pull tab is easily damaged during long-term use or when it is subjected to external impact, especially when the pull tab is held in an upright position and a lateral force is applied to the free end of the pull tab. Utility Model Content

[0004] This invention was made to solve the above-mentioned problems. Its purpose is to provide a zipper head that is not easily damaged even when a lateral force is applied to the free end of the zipper pull, and a zipper having the zipper head.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A zipper pull includes a zipper pull body and a pull tab. The zipper pull body comprises a zipper pull main portion and a pull tab mounting portion. The zipper pull main portion includes a lower wing plate, and the pull tab mounting portion is located on the lower wing plate. The pull tab mounting portion includes an upper plate and a claw portion located on the upper plate. The pull tab has a connecting portion for connecting the claw portion of the pull tab mounting portion. The connecting portion includes two forked portions and a shaft portion connecting the two forked portions.

[0007] Each of the two forked portions has a protrusion integrally formed with the forked portion at its front end, and the protruding direction of the protrusion is consistent with the extending direction of the forked portion.

[0008] The distance from the center of the shaft to the front edge of the protrusion is L, and the distance from the center of the shaft to the upper plate of the pull tab mounting part is M, where L is less than M.

[0009] According to the zipper head described above, when the free end of the zipper pull is subjected to a horizontal pushing force, the protrusion abuts against the side of the zipper pull mounting part on the other side of the shaft, which can effectively prevent the zipper pull from tilting, prevent the shaft from being subjected to excessive force, and ensure the safety of the zipper pull.

[0010] Preferably, each protrusion is formed by directly extending forward from the corresponding fork, so that the shapes of the protrusion and the fork are continuous.

[0011] Based on the zipper pull described above, since the outer surfaces of the protrusions and the corresponding outer surfaces of the forks are smoothly connected, the pull tab has an attractive appearance and is easy to process and shape.

[0012] Preferably, the claw portion includes a first claw portion and a second claw portion, which are respectively bent toward each other to form a hole portion. The shaft portion is fitted into the hole portion. When the radius of the hole portion is r and the distance from the lower edge of the hole portion to the upper plate is S, L < (r + S). The distance between the inner surfaces of the two protrusions and the distance between the inner surfaces of the forked portions are both greater than the widths of the first claw portion and the second claw portion.

[0013] According to the zipper pull described above, when the pull tab rotates around the shaft, the inner surfaces of the protrusion and the fork will not directly rub against the first and second claws. This prevents damage to the outer coating of the first and second claws, making the metal first and second claws less prone to rusting.

[0014] Preferably, the first claw portion and the second claw portion are symmetrically arranged with respect to the shaft portion, and the free ends of the first claw portion and the free ends of the second claw portion are in contact with each other.

[0015] According to the zipper head described above, the first claw and the second claw are symmetrically arranged relative to the shaft, so that the opening for installing the shaft is centered, which facilitates the operation during installation. Furthermore, since the free ends of the first claw and the second claw are in contact with each other, the opening is not easily observed, and the shaft is more firmly held in place, making it less likely to be pulled out.

[0016] Preferably, the shaft portion and the hole portion are interference fit.

[0017] The zipper pull described above can prevent the pull tab from rotating freely.

[0018] Preferably, the pull tab has a handle portion connected to the connecting portion, and there is an included angle θ between the handle portion and the connecting portion, wherein 150°≤θ<180°.

[0019] Based on the zipper head described above, the zipper is easy to open and close by hand with a pull tab, ensuring the zipper head has a compact structure, which is suitable for the use of invisible zippers.

[0020] Alternatively, the handheld part and the connecting part can be on the same plane.

[0021] Preferably, the left and right width of the protrusion gradually decreases as it moves away from the shaft portion.

[0022] This utility model also provides a zipper with the aforementioned zipper head. This zipper can be a concealed zipper or a regular zipper; as long as the zipper head has a claw portion, the pull tab can have the protrusion described in this utility model. Attached Figure Description

[0023] Figure 1 This is a perspective view of the zipper head according to the first embodiment of this application.

[0024] Figure 2 This is a side view of the zipper head according to the first embodiment of this application.

[0025] Figure 3 This is a side view of the zipper head according to the first embodiment of this application.

[0026] Figure 4 This is a side view of the zipper head according to the first embodiment of this application.

[0027] Figure 5 This is a top view of the sheet material of this application.

[0028] Figure 6 yes Figure 5 A cross-sectional view of the pull tab of the zipper head in the first embodiment at line AA.

[0029] Figure 7 yes Figure 5 A cross-sectional view of the zipper pull tab of the second embodiment at line AA.

[0030] Figure 8 This is a top view of the zipper pull of this application.

[0031] Figure 9 yes Figure 8 A cross-sectional view of the zipper head of the first embodiment at the BB line.

[0032] Figure 10 yes Figure 8 A cross-sectional view of the zipper head of the second embodiment at the BB line.

[0033] Figure 11 This is a schematic diagram illustrating the technical effects of this utility model.

[0034] Figure 12 This is a cross-sectional view of the pull-tab shaft with a resin-coated layer according to the present invention.

[0035] Figure 13 A side view of a zipper head for a standard zipper, showing a protrusion at the end of the pull tab.

[0036] Explanation of reference numerals in the attached figures

[0037] 1 Zipper head

[0038] 2. Film Pull

[0039] 21 Connecting part

[0040] 211 Forking section

[0041] 2111 Protrusion

[0042] 212 shaft section

[0043] 2121 resin layer

[0044] 22 Handheld part

[0045] 3 Zipper Heads

[0046] 31 Zipper Head Main Body

[0047] 311 Lower Wing

[0048] 312 wall section

[0049] 313 flange portion

[0050] 314 board

[0051] 32-piece pull-tab mounting section

[0052] 321 First Claw

[0053] 322 Second Claw Detailed Implementation

[0054] In the following description of this utility model, the same reference numerals denote the same structure or equivalent structures in different embodiments.

[0055] In the following description, the front-back direction, left-right direction, and up-down direction are defined as follows. It should be noted that these definitions are provided to improve the clarity of the disclosure and are not intended to limit the utility model described in the claims. The front-back direction is the direction in which the zipper head moves to open and close the left and right zipper teeth. The forward movement of the zipper head engages the left and right zipper teeth, i.e., the left and right zipper teeth are in a meshing state. The backward movement of the zipper head opens the left and right zipper teeth, i.e., the left and right zipper teeth are in a disengaged state. The left-right direction is orthogonal to the front-back direction and is orthogonal to the guide post or connecting post of the zipper head. The up-down direction is orthogonal to both the front-back and left-right directions.

[0056] (First Implementation)

[0057] The first embodiment of this utility model is described with reference to the accompanying drawings. Figure 1 This is a perspective view of the zipper head according to the first embodiment of this application. Figures 2-4 This is a side view of the zipper head according to the first embodiment of this application. Figure 5 This is a top view of the sheet material of this application. Figure 6 yes Figure 5 A cross-sectional view of the zipper pull tab of the first embodiment at line AA. Additionally, Figure 8 This is a top view of the zipper pull of this application. Figure 9 yes Figure 8 A cross-sectional view of the pull tab of the zipper head in the first embodiment at the BB line.

[0058] Depend on Figure 1 As can be seen, the zipper pull 1 in the illustrated example is a zipper pull for concealed zippers, but this utility model is not limited to zipper pulls for concealed zippers. The zipper pull 1 has a pull tab 2 and a zipper pull body 3. The zipper pull body 3 includes a zipper pull main body portion 31 and a pull tab mounting portion 32 provided on the zipper pull main body portion 31. The pull tab 2 is mounted on the pull tab mounting portion 32.

[0059] The zipper head body 31 guides the left and right zipper teeth, and during the process of guiding the left and right zipper teeth, the left and right zipper teeth can engage and disengage. The pull tab mounting part 32 is integrally provided with the zipper head body 31, but is not limited thereto. The pull tab mounting part 32 may also be installed independently of the zipper head body 31.

[0060] Pull tab 2 is an elongated component with an end and a free end. For example... Figure 1 As shown, the pull tab 2 has a connecting portion 21 for connecting the pull tab mounting portion 32 and a handle portion 22 located on the free end side connected to the connecting portion 21. Figure 5As shown, the connecting portion 21 includes a pair of forked portions 211 and a shaft portion 212 connecting the pair of forked portions. In the illustrated example, each forked portion 211 extends in parallel, and therefore, the left-right width of the pair of forked portions 211 is approximately constant in the direction away from the shaft portion 212. The left-right width of the handle portion 22 gradually decreases as it moves away from the shaft portion 212.

[0061] In this embodiment, both the zipper pull body 31 and the pull tab mounting part 32 are made of metal, while the pull tab 2 is made of resin. The pull tab 2 is softer than both the zipper pull body 31 and the pull tab mounting part 32. However, this invention is not limited to this; the pull tab 2 may also be made of metal. In this case, such as... Figure 12 As shown, a resin layer 2121 is generally wrapped around the outside of the shaft portion 212 to reduce wear on the pull tab mounting portion 32.

[0062] In this embodiment, such as Figure 4 As shown, the handle 22 is a flat plate portion arranged at an angle θ to the direction in which the connecting portion 21 extends. That is, the handle 22 and the connecting portion 21 are not on the same plane, and θ can be less than 180° and greater than or equal to 150°. However, this utility model is not limited to this angle. The handle 22 is held by a person to move the zipper head 1 forward or backward. To move the zipper head 1 forward, the person holds the handle 22, causing the pull tab 2 to tilt forward. To move the zipper head 1 backward, the person holds the handle 22, causing the pull tab 2 to tilt backward. When the pull tab 2 is lowered forward, the handle 22 extends diagonally forward and upward from the zipper head body 31, and the handle 22 does not contact the upper surface of the zipper head body 31; there is a gap between the two. With this feature, in concealed zippers, interference between the handle 22 and the fixed zipper strap can be suppressed or mitigated, which is suitable for the use of concealed zippers.

[0063] The zipper pull body 3 is suitable for concealed zippers. The zipper pull body 31 includes: a lower wing plate 311; a pair of left and right wall portions 312 provided on the left and right side edges of the lower wing plate 311; a pair of left and right flange portions 313 extending inward in the left and right direction from the upper end of the wall portions 312; a guide post (not shown) provided on the front end side of the lower wing plate 311; and an upper plate 314 protruding rearward from the upper end of the guide post. A pull tab mounting portion 32 is provided on the upper surface of the lower wing plate 311.

[0064] The pull tab mounting part 32 includes a first claw part 321 and a second claw part 322 that provide shaft support for the shaft part 212 of the pull tab 2. The first claw part 321 and the second claw part 322 are bent toward each other to form a hole, and the shaft part 212 is fitted into the hole.

[0065] The free ends of the first claw portion 321 and the second claw portion 322 are in contact with each other, and the first claw portion 321 and the second claw portion 322 are symmetrically arranged with respect to the shaft portion 212 in the front-back direction. By making the free ends of the first claw portion 321 and the second claw portion 322 in contact with each other, the holding effect of the pull tab mounting portion 32 on the shaft portion 212 is more stable, and the shaft portion 212 is less likely to fall out of the hole formed by the first claw portion 321 and the second claw portion 322. By symmetrically arranging the first claw portion 321 and the second claw portion 322 with respect to the shaft portion 212 in the front-back direction, the opening for mounting the shaft portion 212 is centered, facilitating the operation during installation. The shaft portion 212 and the hole formed by the first claw portion 321 and the second claw portion 322 are interference fits. This prevents the pull tab 2 from rotating freely and prevents the pull tab 2 from wobbling.

[0066] In this embodiment, each of the two forked portions 211 has a protrusion 2111 integrally formed with the forked portion 211 at its front end, i.e., at the end of the pull tab 2. The protruding direction of the protrusion 2111 is consistent with the extending direction of the forked portion 211. Thus, regardless of whether the pull tab 2 is laid flat facing forward or backward, the protrusion 2111 will not affect the distance between the pull tab 2 and the upper plate 314, making the overall structure of the zipper head compact. Furthermore, when the free end of the pull tab 2 is subjected to a horizontal pushing force in the left-right direction, such as... Figure 11 As shown, the protrusion 2111 abuts against the side of the first claw 321 or the second claw 322 of the pull tab mounting part 32 on the other side relative to the shaft part 212. This effectively prevents the pull tab 2 from tilting, avoids excessive force on the shaft part 212, and ensures the safety of the pull tab.

[0067] In addition, in order to have a protrusion 2111 on the end side of the pull tab 2, a sleeve with the protrusion can also be formed integrally with the fork portion, and the sleeve can be fitted onto the fork portion. However, from the perspective of simplifying processing and reducing costs, it is preferable to form the protrusion integrally with the fork portion.

[0068] In the pull tab 2 of this utility model, since the forked portion 211 and the protrusion 2111 are integrally formed, the processing of the pull tab with the protrusion is made easier, and the processing cost can be reduced compared with the structure in which the protrusion is formed separately.

[0069] In order to prevent the protrusion 2111 from interfering with the rotation of the pull tab 2 around the shaft 212, as shown in Figure 2, the distance L from the center O of the shaft 212 to the front edge of the protrusion 2111 is less than the distance M from the center of the shaft 212 to the upper plate 314.

[0070] In other words, when the radius of the hole is r and the distance from the lower edge of the hole to the upper plate 314 is S, the distance L can also be set to be less than r + S.

[0071] Alternatively, if the radius of the shaft portion 212 is r', the distance L can be set to be less than r' + S. It should be noted that when the shaft portion 212 is made of metal and is covered with a resin layer 2121, the radius r' includes the thickness of the resin layer 2121.

[0072] Each protrusion 2111 is formed by directly extending forward from the corresponding fork 211, thus the shapes of the protrusion 2111 and the fork 211 are continuous. That is, each outer surface of the protrusion 2111 and the corresponding outer surface of the fork 211 are smoothly connected, which is both aesthetically pleasing and easy to process and shape.

[0073] Furthermore, the distance between the inner surfaces of the two protrusions 2111 is greater than the width of the first claw 321 and the second claw 322. Similarly, the distance between the inner surfaces of the forked portions 211 is also greater than the width of the first claw 321 and the second claw 322. Thus, when the pull tab 2 rotates around the shaft 212, the inner surfaces of the protrusions 2111 and the forked portions 211 will not directly rub against the first claw 321 and the second claw 322. This reduces the risk of damage to the outer coating of the first claw 321 and the second claw 322, making the metal first claw 321 and the second claw 322 less prone to rust.

[0074] like Figure 5 , 6 As shown in Figures 7, 9, and 10, the cross-section of the shaft portion 212 is circular, and the portion where the shaft portion 212 connects to each branch portion 211 is provided with an inner rounded portion. The inner rounded portion can, to a certain extent, lock the pull tab 2 into the zipper head mounting portion 32, further preventing the pull tab 2 from wobbling randomly, and at the same time, preventing stress concentration in the shaft portion.

[0075] like Figure 2 , Figure 3 As shown, the thickness of the portion of the forked portion 211 that connects to the shaft portion 212 is greater than the diameter of the shaft portion 212. In this way, the shaft portion 212 is completely covered by the forked portion 211 and cannot be seen from the outside, which is both aesthetically pleasing and increases the strength of the pull tab.

[0076] (Second Implementation)

[0077] The second embodiment of this utility model is described with reference to the accompanying drawings. Figure 7 yes Figure 5 A cross-sectional view of the zipper pull tab of the second embodiment at line AA. Figure 10 yes Figure 8 A cross-sectional view of the pull tab of the zipper head in the second embodiment at the BB line.

[0078] In the first embodiment described above, there is an angle θ between the handle portion 22 and the connecting portion 21, meaning that the handle portion 22 and the connecting portion 21 are not on the same plane. However, this utility model is not limited to this, such as... Figure 7 and Figure 10 As shown, there is no included angle between the handle portion 22 and the connecting portion 21 of the pull tab 2, i.e., they are on the same plane. Apart from this, the structure of the second embodiment of this utility model is the same as that of the first embodiment described above.

[0079] It should be noted that the above-described embodiments of the present invention are illustrated using a zipper head for a concealed zipper as an example. However, the technology of the present invention can be used not only for zipper heads of concealed zippers, but also for any zipper pull mounting part that has a claw part. Figure 13 A side view of a zipper head for a standard zipper is shown, with a protrusion 2111 at the end of the pull tab 2. Figure 13 In this zipper head, the pull tab 2 is in a folded-down state. In this zipper head, the distance L from the center O of the shaft 212 to the front edge of the protrusion 2111 is also less than the distance M from the center of the shaft 212 to the upper plate 314. This zipper head effectively prevents the pull tab 2 from tilting, avoids excessive force on the shaft 212, and ensures the safety of the pull tab. Furthermore, when the pull tab 2 rotates around the shaft 212, the protrusion 2111 will not contact the upper plate 314, and will not interfere with the rotation of the pull tab 2 around the shaft 212.

[0080] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Without departing from the basic principles of this utility model, any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details will be included within the scope of the claims of this utility model.

Claims

1. A slider for a slide fastener, comprising a slider body and a pull tab, the slider body including a slider main body portion and a pull tab mounting portion, the slider main body portion including a lower wing plate, the pull tab mounting portion being provided on the lower wing plate, the pull tab mounting portion including an upper plate and a claw portion provided above the upper plate, the pull tab having a connecting portion for connecting the claw portion of the pull tab mounting portion, the connecting portion including two forked portions and a shaft portion connecting the two forked portions, characterized in that, each of the two forked portions has a protrusion portion integrally formed with the forked portion at a front end of the forked portion, the protrusion portion extending in the same direction as the forked portion, a distance from a center of the shaft portion to a front end edge of the protrusion portion is L, a distance from the center of the shaft portion to the upper plate of the pull tab mounting portion is M, wherein L is smaller than M, and a distance between inner side surfaces of the two protrusion portions and a distance between inner side surfaces of the forked portions are each greater than a width of the claw portion.

2. The slider according to claim 1, wherein each protrusion portion is directly extended forward from the corresponding forked portion so that the protrusion portion and the forked portion have a continuous shape.

3. The slider according to claim 1, wherein the claw portion includes a first claw portion and a second claw portion, the first claw portion and the second claw portion are respectively bent toward each other to form a hole portion together, the shaft portion is fitted into the hole portion, and when a radius of the hole portion is r and a distance from a lower end edge of the hole portion to the upper plate is S, L is smaller than a sum of r and S.

4. The slider according to claim 3, wherein the first claw portion and the second claw portion are symmetrically provided with respect to the shaft portion, and a free end of the first claw portion and a free end of the second claw portion are in contact with each other.

5. The slider according to claim 3, wherein the shaft portion and the hole portion are in interference fit.

6. The slider according to any one of claims 1 to 5, wherein the pull tab has a hand holding portion connected to the connecting portion, and an included angle θ between the hand holding portion and the connecting portion is greater than or equal to 150° and smaller than 180°.

7. The slider according to any one of claims 1 to 5, wherein the pull tab has a hand holding portion, and the hand holding portion is in the same plane as the connecting portion.

8. The slider according to any one of claims 1 to 5, wherein left and right widths of the protrusion portion gradually decrease away from the shaft portion.

9. A slide fastener, comprising the slider according to any one of claims 1 to 8. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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