LOCK SLIDER OF INVISIBLE ZIPPER

Description

The present application is the national phase of International Application No. PCT/CN2024/106679, titled “LOCK SLIDER OF INVISIBLE ZIPPER”, filed on Jul. 22, 2024, which claims the priority to Chinese Patent Application No. 202310960101.2, titled “LOCK SLIDER OF INVISIBLE ZIPPER”, filed with the China National Intellectual Property Administration on Aug. 1, 2023, the entire contents of which are incorporated herein by reference.

FIELD

The present application relates to the field of clothing, and in particular to a lock slider of an invisible zipper.

BACKGROUND

The existing invisible lock zipper has left and right protrusions at a front end of a pull tab, as well as a groove in the middle of a cross rod of the pull tab for engagement with a hook, to prevent the pull tab from shaking left and right. However, when the hook is not inserted into zipper teeth, the pull tab still shakes to some extent when being rotated in use, which affects the performance of the invisible zipper in use.

SUMMARY

A lock slider of an invisible zipper is provided according to the present application, which reduces the shaking of a pull tab during rotation, to improve the performance of the invisible zipper in use.

To achieve the above object, a lock slider of an invisible zipper is provided according to the present application, including a pull tab, a slider body, and a hook.

A first cross rod is provided at an end of the pull tab, and the first cross rod includes a hinge portion and a protrusion protruding from an outer peripheral surface of the hinge portion. A lug of the slider body is provided with a hinge groove in cooperation with the hinge portion in a rotatable manner and a limiting groove in cooperation with the protrusion in a limiting manner. The limiting groove is configured to prevent the pull tab from moving in an axial direction of the first cross rod.

At least one end of the hook is configured to be inserted into zipper teeth to lock the slider body. The protrusion is provided with a contact portion. The contact portion is configured to push the hook when the pull tab is rotated by a preset angle relative to a lower surface of the slider body, and the hook is separated from the zipper teeth to unlock the slider body.

In one embodiment, based on the lock slider of the invisible zipper, the protrusion is an arc-shaped protrusion, and the arc-shaped protrusion is coaxial with the hinge portion.

In one embodiment, the lock slider of the invisible zipper further includes an elastic sheet cover plate, which is connected to the slider body. A pressing portion is provided on the elastic sheet cover plate and is configured to apply a pressing force to the hook to move the hook toward the zipper teeth.

In one embodiment, based on the lock slider of the invisible zipper, the pressing portion is an elastic sheet, and the elastic sheet includes a flat section and a curved section. The flat section is in contact with the hook, and two ends of the curved section are respectively connected to the flat section and the elastic sheet cover plate. The curved section is configured to be elastically deformed to apply a force to the flat section.

In one embodiment, based on the lock slider of the invisible zipper, the pressing portion further includes an abutting plate, and the abutting plate is connected to the elastic sheet cover plate and is configured to abut against the hook at a position corresponding to the protrusion.

In one embodiment, based on the lock slider of the invisible zipper, the lug of the slider body is provided with a protruding wall, and the protruding wall is provided with a stepped surface for supporting the elastic sheet cover plate. The protruding wall is configured to be mechanically deformed to press the elastic sheet cover plate against the stepped surface.

In one embodiment, based on the lock slider of the invisible zipper, a first limiting portion is provided on the lug of the slider body, and a second limiting portion is provided on the elastic sheet cover plate. The first limiting portion cooperates with the second limiting portion to prevent the elastic sheet cover plate from moving in a direction perpendicular to the axial direction of the first cross rod.

In one embodiment, based on the lock slider of the invisible zipper, the elastic sheet cover plate is provided with a bend, and the bend is concave toward the hook and is for increasing a distance between the elastic sheet cover plate and the hook.

In one embodiment, based on the lock slider of the invisible zipper, the hook is a U-shaped hook, and a rear vertical rod of the U-shaped hook is configured to be inserted into the zipper teeth. The rear vertical rod is connected to a second cross rod of the U-shaped hook through an inclined rod. The inclined rod is inclined from the second cross rod toward the lower surface of the slider body, to prevent the elastic sheet cover plate from hindering a movement of the hook.

In one embodiment, based on the lock slider of the invisible zipper, the hinge portion is provided with an engagement groove, and the hook is configured to be engaged into the engagement groove. The engagement groove and the protrusion are oppositely arranged on two sides of an axis of the first cross rod.

According to the embodiment of the present application, the lock slider of the invisible zipper includes the pull tab, the slider body and the hook. The first cross rod of the pull tab is provided with the hinge portion and the protrusion, and the lug of the slider body is provided with the hinge groove in cooperation with the hinge portion in a rotatable manner and the limiting groove in cooperation with the protrusion in a limiting manner. The pull tab is mounted on the slider body, the hinge portion is located in the hinge groove, and the protrusion is located in the limiting groove. When the pull tab is rotated, the hinge portion rotates in the hinge groove, and at the same time, the protrusion moves in the limiting groove. When the pull tab is rotated by a preset angle relative to the lower surface of the slider body, the protrusion can push the hook. As the pull tab continues to rotate, the protrusion pushes the hook to be separated from the zipper teeth to unlock the slider body. During the rotation of the pull tab, the protrusion is always at least partially located in the limiting groove, and the limiting groove can always limit the protrusion, to prevent the pull tab from moving in the axial direction of the first cross rod. As such, it is possible to reduce the shaking of the pull tab when being rotated in use, thus improving the performance of the invisible zipper in use.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or in the conventional technology, the accompanying drawings used in the description of the embodiments or the conventional technology are briefly described below. Apparently, the accompanying drawings in the following description show only some examples or embodiments of the present application, and other drawings may be obtained based on the accompanying drawings. In addition, the present application may also be applied to other similar scenarios based on the accompanying drawings. The same reference numeral in the accompanying drawings represent the same structure or operation unless it is obvious from the context or otherwise stated.

FIG. 1 is a schematic structural view of a lock slider of an invisible zipper (before being mechanically deformed) according to a first embodiment of the present application;

FIG. 2 is a schematic structural view of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 3 is an exploded view of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 4 is a schematic structural view of a slider body of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 5 is a sectional view of the slider body of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 6 is a schematic structural view of a pull tab of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 7 is a sectional view of the pull tab of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 8 is a schematic structural view of an elastic sheet cover plate of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 9 is a schematic structural view of a hook of the lock slider of the invisible zipper according to the first embodiment of the present application;

FIG. 10 is a schematic structural view of the lock slider of the invisible zipper according to the first embodiment of the present application at an initial position;

FIG. 11 is a schematic structural view of the lock slider of the invisible zipper according to the first embodiment of the present application at a second position;

FIG. 12 is a schematic structural view of the lock slider of the invisible zipper according to the first embodiment of the present application at a third position;

FIG. 13 is a schematic structural view of the lock slider of the invisible zipper according to the first embodiment of the present application at a fourth position;

FIG. 14 is a schematic structural view of a lock slider of an invisible zipper according to a second embodiment of the present application;

FIG. 15 is a sectional view of the lock slider of the invisible zipper according to the second embodiment of the present application; and

FIG. 16 is a schematic structural view of an elastic sheet cover plate of the lock slider of the invisible zipper according to the second embodiment of the present application.

REFERENCE NUMERALS

1. pull tab;	11. first cross rod;
111. protrusion;	112. engagement groove;
2. slider body;	21. lug;
211. hinge groove;	212. limiting groove;
213. protruding wall;	214. stepped surface;
215. hook front-end engagement groove;	216. hook hole;
3. hook;	4. elastic sheet cover plate;
41. elastic sheet;	42. abutting plate.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present application is further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that some embodiments described herein are used to explain the present application rather than limiting the present application. The described embodiments are only some embodiments rather than all the embodiments of the present application.

It should be noted that, for the convenience of description, the accompanying drawings merely show parts related to the present application. The embodiments of the present application and features in the embodiments may be combined with each other without conflict.

Hereinafter, the terms “first”, “second” and the like are only for purpose of description, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the features referred to. Therefore, a feature defined by “first” or “second” may explicitly or implicitly include one or more such features.

Please refer to FIGS. 1 to 16.

A lock slider of an invisible zipper is disclosed according to the present application, including a pull tab 1, a slider body 2 and a hook 3. In one embodiment, the pull tab 1 and the hook 3 are both mounted on the slider body 2, and the pull tab 1 is fixed to the slider body 2 by the hook 3.

A first cross rod 11 is provided at an end of the pull tab 1, and the first cross rod 11 includes a hinge portion and a protrusion 111 protruding from an outer peripheral surface of the hinge portion. A lug 21 of the slider body 2 is provided with a hinge groove 211 in cooperation with the hinge portion, and the hinge portion is rotatable relative to the hinge groove 211, and the pull tab 1 can rotate relative to the slider body 2. The slider body 2 is provided with a limiting groove 212 in cooperation with the protrusion 111 and is configured to limit the protrusion 111, and the limiting groove 212 is provided at a bottom of the hinge groove 211. The protrusion 111 cooperates with the limiting groove 212 to prevent the pull tab 1 from moving in an axial direction of the first cross rod 11, to reduce the shaking of the pull tab 1.

At least one end of the hook 3 can be inserted into zipper teeth. The hook 3 is inserted into the zipper teeth to lock the slider body 2, and the hook 3 is separated from the zipper teeth to unlock the slider body 2.

The protrusion 111 has a contact portion, which can push the hook 3 when the pull tab 1 is rotated by a preset angle relative to a lower surface of the slider body 2, and the hook 3 is separated from the zipper teeth to unlock the slider body 2. In this embodiment, the slider body 2 is switched between a locked state and an unlocked state through the rotation of the protrusion 111.

The contact portion of the protrusion 111 is a part where the protrusion 111 can be in contact with the hook 3 and can apply a pushing force to the hook 3. When the pull tab 1 is rotated by the preset angle relative to the lower surface of the slider body 2, the contact portion of the protrusion 111 comes into contact with the hook 3 and can apply a pushing force to the hook 3. When the pull tab 1 continues to rotate beyond the preset angle, the contact portion of the protrusion 111 continues to push the hook 3, and the hook 3 is separated from the zipper teeth to unlock the slider body 2. When the pull tab 1 is rotated in an opposite direction until the pull tab 1 returns to the initial position, the hook 3 is inserted into the zipper teeth, and the slider body 2 is locked.

The lower surface of the slider body 2 is a surface of the slider body 2 located on an inner side of a tape, and the inner side of the tape is the side of the tape close to an interior of a garment.

The preset angle is flexibly designed according to actual needs, and it may be 5°, 10°, or other values, which is not limited herein.

The lock slider of the invisible zipper disclosed in the present application includes the pull tab 1, the slider body 2 and the hook 3. The first cross rod 11 of the pull tab 1 is provided with the hinge portion and the protrusion 111, and the lug 21 of the slider body 2 is provided with the hinge groove 211 in cooperation with the hinge portion in a rotatable manner and the limiting groove 212 in cooperation with the protrusion 111 in a limiting manner. The pull tab 1 is mounted on the slider body 2, the hinge portion is located in the hinge groove 211, and the protrusion 111 is located in the limiting groove 212. When the pull tab 1 is rotated, the hinge portion rotates in the hinge groove 211, and at the same time, the protrusion 111 moves in the limiting groove 212. When the pull tab 1 is rotated by a preset angle relative to the lower surface of the slider body 2, the protrusion 111 can push the hook 3. As the pull tab 1 continues to rotate, the protrusion 111 pushes the hook 3 to be separated from the zipper teeth to unlock the slider body 2. During the rotation of the pull tab 1, the protrusion 111 is always at least partially located in the limiting groove 212, and the limiting groove 212 always limits the protrusion 111, to prevent the pull tab 1 from moving in an axial direction of the first cross rod 11. As such, it is possible to reduce the shaking of the pull tab 1 when being rotated in use, thus improving the performance of the invisible zipper in use.

According to the present application, the protrusion 111 can not only prevent the pull tab 1 from moving in a length direction of the first cross rod 11, but also push the hook 3 to unlock the slider body 2.

In one embodiment, the hinge portion of the first cross rod 11 and the protrusion 111 are integrally formed.

As shown in FIG. 3, the protrusion 111 is an arc-shaped protrusion, and the arc-shaped protrusion can push the hook 3 when a side edge of the arc-shaped protrusion is in contact with the hook 3. In one embodiment, the limiting groove 212 is an arc-shaped limiting groove.

A value of the preset angle is determined by a central angle of the arc-shaped protrusion. In one embodiment, the protrusion 111 and the hinge portion are coaxially arranged.

In some embodiments of the present application, the central angle of the arc-shaped protrusion is 180°. The hook 3 can be pushed even when the pull tab 1 is rotated by a small angle, which improves the reliability of unlocking the slider body 2.

As shown in FIG. 10, the pull tab 1 is at a first operating position. The pull tab 1 is at a rear end of the slider body 2 and is rotated by an angle of 0° relative to the lower surface of the slider body 2. The protrusion 111 does not apply a pushing force to the hook 3, and the hook 3 is inserted into the zipper teeth.

As shown in FIG. 11, the pull tab 1 is at a second operating position. The pull tab 1 is at the rear end of the slider body 2 and is rotated by an angle, which is less than 90°, relative to the lower surface of the slider body 2. The protrusion 111 applies a pushing force to the hook 3. The hook 3 is separated from the zipper teeth, but has not been pushed to a highest position. When the pull tab 1 continues to rotate and an angle between the pull tab 1 and the lower surface of the slider body 2 is 90°, the protrusion 111 applies a pushing force to the hook 3, and the hook 3 is pushed to the highest position.

As shown in FIG. 12, the pull tab 1 is at a third operating position. The pull tab 1 is at a front end of the slider body 2 and is rotated by an angle, which is between 90° and 180°, relative to the lower surface of the slider body 2. The protrusion 111 applies a pushing force to the hook 3. The hook 3 is separated from the zipper teeth, and the height of the hook 3 being pushed is reduced.

As shown in FIG. 13, the pull tab 1 is at a fourth operating position. The pull tab 1 is at the front end of the slider body 2 and is rotated by an angle, which is close to 180°, relative to the lower surface of the slider body 2. The protrusion 111 applies a pushing force to the hook 3, the hook 3 is separated from the zipper teeth, and the height of the hook 3 being pushed is reduced.

The terms “front” and “rear” are explained herein. One end of the slider body 2 is provided with an engagement outlet, and the other end of the slider body 2 is provided with two introducing ports. In this embodiment, the end of the slider body 2 at which the introducing port is located is in the front, and the end of the slider body 2 at which the engagement port is located is in the rear.

In an embodiment, the central angle of the arc-shaped protrusion is 180°. During the rotation of the arc-shaped protrusion by an angle of 180° along with the pull tab 1, the arc-shaped protrusion is always at least partially located in the limiting groove 212, ensuring that the limiting groove 212 can always limit the protrusion 111, to minimize the problem that the pull tab 1 shakes during rotation.

In one embodiment, the central angle of the arc-shaped protrusion is less than or equal to 180°.

The hook 3 may be mounted on the slider body 2 through its own structure, or may be mounted on the slider body 2 through an elastic sheet cover plate 4.

In an embodiment, the lock slider of the invisible zipper further includes an elastic sheet cover plate 4. The elastic sheet cover plate 4 is connected to the slider body 2, and can press the hook 3 against the slider body 2.

As shown in FIG. 3, the slider body 2, the pull tab 1, the hook 3, and the elastic sheet cover plate 4 are arranged in sequence.

The elastic sheet cover plate 4 is provided with a pressing portion, which can apply a pressing force to the hook 3 to drive the hook 3 to move toward the zipper teeth, to reduce the swing of the pull tab 1 around the axial direction of the first cross rod 11 when the pull tab 1 is stationary or rotating. The force applied to the hook 3 by the pressing portion is toward the lower surface of the slider body 2.

When the pull tab 1 is rotated, the hook 3 is lifted, and the pressing portion of the elastic sheet cover plate 4 is also lifted. Since the elastic sheet cover plate 4 is fixed to the slider body 2, the pressing portion generates a pressing force to press the hook 3 downward, and the pressing force is further transmitted by the hook 3 to the first cross rod 11 to increase the rotational damping of the pull tab 1, to reduce the swing of the pull tab 1 around the axial direction of the first cross rod 11 during rotation of the pull tab 1.

When the pull tab 1 is stationary, i.e., when the pull tab 1 is not rotated, the pressing portion applies a pressing force to the hook 3 when the elastic sheet cover plate 4 is mounted on the slider body 2. Further, the pressing force is transmitted by the hook 3 to the first cross rod 11 to increase the rotational damping of the pull tab 1, to reduce the swing of the pull tab 1 around the axial direction of the first cross rod 11 when the pull tab 1 is stationary.

The arrangement of the pressing portion can effectively reduce the swing of the pull tab 1 around the axial direction of the first cross rod 11 along with a movement of a user, to avoid the sound caused by the collision between the pull tab 1 and the zipper teeth, and improving the performance of the invisible zipper in use.

The pressing portion can continuously apply a pressing force to the hook 3 during the rotation of the pull tab 1, and the force applied to the hook 3 by the pressing portion gradually increases with the rotation of the pull tab 1 before the hook 3 is lifted to the highest position. The hook 3 transmits the pressing force to the first cross rod 11, and the protrusion 111 is pressed into the limiting groove 212. As such, the protrusion 111 is prevented from being separated from the limiting groove 212 during the rotation of the pull tab 1, to improve the stability and reliability of the lock slider in use.

In some embodiments of the present application, the pressing portion is an elastic sheet 41.

The pressing portion keeps applying the pressing force to the hook 3. When the pull tab 1 is rotated from the front end of the slider body 2 to the rear end of the slider body 2, the hook 3 can be inserted into the zipper teeth under the pressing force applied by the pressing portion to effectively lock the slider body 2.

As shown in FIG. 8, the elastic sheet 41 includes a flat section and a curved section. The flat section can be in contact with the hook 3. One end of the curved section is connected to the flat section, and the other end of the curved section is connected to the elastic sheet cover plate 4. When the pull tab 1 is rotated, the protrusion 111 pushes the hook 3 to move. The hook 3 presses the flat section of the elastic sheet 41, causing the curved section to be deformed. The curved section can apply a force to the flat section, and the flat section presses the hook 3 downward.

The curved section may have a structure shown in FIG. 8, and a concave side of the curved section faces a space between the flat section and the elastic sheet cover plate 4. The concave side of the curved section may also face away from the space between the flat section and the elastic sheet cover plate 4 (not shown in the drawings).

The curved section may have only one bend as shown in FIG. 8, or may have a wavy structure with multiple curved bends (not shown in the drawings).

As shown in FIG. 8, a front end of the hook 3 is not inserted into the zipper teeth, and a rear end of the hook 3 is inserted into the zipper teeth. In this embodiment, the pressing portion is provided at a front end of the elastic sheet cover plate 4 to press the front end of the hook 3.

The pressing portion may be provided in a middle portion of the elastic sheet cover plate 4 (not shown in the drawings) and presses a middle portion of the hook 3, and in this case, the front end and/or the rear end of the hook 3 may be inserted into the zipper teeth.

The elastic sheet cover plate 4 is formed by stamping and bending an elastic metal sheet. In one embodiment, the elastic sheet cover plate 4 and the pressing portion are integrally formed.

In other embodiments of the present application, as shown in FIGS. 14 and 15, the pressing portion further includes an abutting plate 42. The abutting plate 42 is connected to the elastic sheet cover plate 4 and can abut against the hook 3 at a position corresponding to the protrusion 111. In this embodiment, the abutting plate 42 cooperates with the elastic sheet 41 to press the hook 3, and the abutting plate 42 and the elastic sheet 41 both apply pressing forces to the hook 3, to further reduce the swing of the pull tab 1 around the axial direction of the first cross rod 11 when the pull tab 1 is stationary or rotating while ensuring that the protrusion 111 is always in the limiting groove 212 during rotation.

A part of the elastic sheet cover plate 4 where the abutting plate 42 is provided needs to be widened. The abutting plate 42 is manufactured by a cutting process at the widened part of the elastic sheet cover plate 4. After cutting, the abutting plate 42 is bent toward the hook 3 and can abut against the hook 3, and meanwhile, an avoidance groove is formed on the elastic sheet cover plate 4 for the abutting plate 42 to move.

The elastic sheet 41 and the abutting plate 42 are arranged along a length direction of the elastic sheet cover plate 4 and are spaced apart from each other.

The elastic sheet cover plate 4 is fixedly connected to the slider body 2.

In some embodiments of the present application, the lug 21 of the slider body 2 is provided with a protruding wall 213, and the protruding wall 213 is provided with a stepped surface 214 for supporting the elastic sheet cover plate 4. The protruding wall 213 is mechanically deformed to press the elastic sheet cover plate 4 against the stepped surface 214. The pressing portion is located below the stepped surface 214 and presses the hook 3.

In one embodiment, the protruding wall 213 is provided at the front end of the slider body 2 and/or the rear end of the slider body 2 to fix the front end and/or the rear end of the elastic sheet cover plate 4.

The lug 21 is provided with protruding walls 213. In one embodiment, the protruding walls 213 are provided in pairs in a direction perpendicular to the axial direction of the first cross rod 11.

As shown in FIG. 4, a front end of the lug 21 is provided with a first protruding wall 213, and a rear end of the lug 21 is provided with a second protruding wall 213. The first protruding wall 213 is mechanically impacted to be deformed, and the front end of the elastic sheet cover plate 4 is fixed on the stepped surface 214. The second protruding wall 213 is mechanically impacted to be deformed, and the rear end of the elastic sheet cover plate 4 is fixed on the stepped surface 214.

In order to improve the mounting precision of the elastic sheet cover plate 4 on the lug 21, a first limiting portion is provided on the lug 21, and a second limiting portion is provided on the elastic sheet cover plate 4. The first limiting portion cooperates with the second limiting portion to prevent the elastic sheet cover plate 4 from moving in a direction perpendicular to the axial direction of the first cross rod 11.

At least one first limiting portion is provided on the lug 21, and at least one second limiting portion is provided on the elastic sheet cover plate 4. The second limiting portion is in one-to-one correspondence with the first limiting portion and the number of the second limiting portion is equal to that of the first limiting portion.

In some embodiments of the present application, the first limiting portion is a limiting protrusion and/or a limiting groove, and the second limiting portion is a limiting groove and/or a limiting protrusion. In one embodiment, the first limiting portion is a limiting protrusion, and the second limiting portion is a limiting groove. In one embodiment, the first limiting portion is a limiting groove, and the second limiting portion is a limiting protrusion.

When the lug 21 is provided with at least two first limiting portions, each of the first limiting portions may be a limiting groove or a limiting protrusion. In one embodiment, some of the first limiting portions are limiting grooves, and the rest of the first limiting portions are limiting protrusions.

As shown in FIG. 5, the front end of the lug 21 is provided with a first limiting groove, and the rear end of the lug 21 is provided with a first limiting protrusion. The front end of the elastic sheet cover plate 4 is provided with a second limiting protrusion, and the rear end of the elastic sheet cover plate 4 is provided with a second limiting groove. During mounting, the first limiting groove at the front end of the lug 21 cooperates with the second limiting protrusion of the elastic sheet cover plate 4 in a limiting manner, and the first limiting protrusion at the rear end of the lug 21 cooperates with and limits the second limiting groove of the elastic sheet cover plate 4 in a limiting manner, and the elastic sheet cover plate 4 is limited in the direction perpendicular to the axial direction of the first cross rod 11.

As shown in FIGS. 3 and 8, the elastic sheet cover plate 4 is provided with a bend, and the bent is concave toward the hook 3 and is for increasing a distance between the elastic sheet cover plate 4 and the hook 3 to form an avoidance space, to ensure that the hook 3 can be pushed up to the highest position by the protrusion 111, to reduce the interference on the rotation of the pull tab 1.

The hook 3 is a U-shaped hook, which includes a rear vertical rod, a second cross rod and a front vertical rod. The rear vertical rod and the front vertical rod are respectively located at two ends of the second cross rod in a length direction of the second cross rod. In this embodiment, the rear vertical rod is longer than the front vertical rod. The rear vertical rod can be inserted into the zipper teeth, and the front vertical rod is not inserted into the zipper teeth. A part of the second cross rod close to the front vertical rod cooperates with the pressing portion of the elastic sheet cover plate 4. When the protrusion 111 pushes the hook 3, the rear vertical rod and the second cross rod are pushed upward and lifted, and the rear vertical rod is pulled out of the zipper teeth.

Due to the push of the projection 111, the rear vertical rod is lifted. At this time, a height of a joint of the rear vertical rod and the second cross rod is greater than heights of other parts of the hook 3. In order to prevent the joint of the rear vertical rod and the second cross rod from contacting the elastic sheet cover plate 4, an inclined rod is provided at the joint of the rear vertical rod and the second cross rod. That is, the rear vertical rod and the second cross rod are connected through the inclined rod. The inclined rod is inclined from the second cross rod toward the lower surface of the slider body 2, and the height of this part is reduced. In this way, the elastic sheet cover plate 4 is prevented from hindering the movement of the hook 3, to not affect the rotation of the pull tab 1.

The hook 3 is formed by stamping and bending a hard metal sheet with certain elasticity.

As shown in FIG. 9, the second cross rod includes a first straight segment, an inclined segment and a second straight segment which are connected to each other. The first straight segment is connected to the front vertical rod, the second straight segment is connected to the inclined rod, and the inclined segment is located between the first straight segment and the second straight segment. There is a height difference between the first straight segment and the second straight segment, and the second straight segment is farther away from the lower surface of the slider body 2 than the first straight segment.

The hook 3 is mounted on the lug 21 of the slider body 2. The front end of the lug 21 is provided with a hook front-end engagement groove 215, and the rear end of the lug 21 is provided with a hook hole 216. The hook hole 216 is in communication with an inner cavity of the slider body 2. The rear vertical rod of the hook 3 passes through the hook hole 216 to be inserted into the zipper teeth, and the front vertical rod of the hook 3 is inserted into the hook front-end engagement groove 215. After the pull-tab 1 is mounted to the lug 21, the hinge portion of the first cross rod 11 of the pull tab 1 protrudes from the hinge groove 211. The first straight segment can be pressed against the front end of the lug 21, and the second straight segment can be pressed against the hinge portion protruding from the hinge groove 211.

In order to further optimize the above embodiments, the first cross rod 11 is provided with an engagement groove for the hook 3 to be engaged therein. The engagement groove has a width close to that of the hook 3. The engagement groove and the hook 3 cooperate with each other in a limiting manner, to reduce the shaking of the pull tab 1 in the axial direction of the first cross rod 11 during the rotation of the pull tab 1. In this embodiment, the first cross rod 11 is effectively limited through the limiting cooperation between the engagement groove and the hook 3, and between the protrusion 111 and the limiting groove 212, to reduce the shaking of the pull tab 1 in the axial direction of the first cross rod 11 during the rotation of the pull tab 1.

In one embodiment, the engagement groove and the protrusion 111 are oppositely arranged on two sides of an axis of the first cross rod 11.

As shown in FIG. 6, a middle portion of the pull tab 1 is provided with a bend. When the pull tab 1 is located at the rear end of the slider body 2, the rear end of the pull tab 1 has a height less than that of the front end of the pull tab 1, and a distance between the pull tab 1 and the zipper teeth is reduced when the pull tab 1 is stationary.

According to the lock slider of the invisible zipper disclosed in the present application, the structures of the pull tab 1 and the slider body 2 are modified to enhance the stability and user experience of the product, and the pull tab 1 does not shake in use. The change to the appearance of the slider is small, and the size of the slider will not be increased too much. The structure is simple, and various components are connected to each other by mechanical deformation, which is convenient for mounting and production.

The above description only illustrates some embodiments of the present application and the principle of the present application, and is not intended to limit the present application. Various modifications and variations may be made to the present application. The scope of the present application is not limited to the embodiments formed by a particular combination of the above features, but also covers other embodiments formed by any combination of the above features or equivalent features thereof without departing from the above concept of the present application, and the embodiments formed by replacing the features described above and features having similar functions disclosed in (but not limited to) the present application with each other.