Zipper and article with zipper

Abstract

The utility model discloses a kind of zipper and the article with zipper, the zipper includes chain belt, puller, first stop block and second stop block, puller includes puller body and pull sheet;Pull sheet is provided with through hole, the inner side wall of through hole is provided with limiting protrusion;The surface of second stop block is provided with buckle structure, buckle structure is matched with limiting protrusion;When pulling puller makes two rows of chain teeth completely engage, buckle structure is set to be inserted into through hole under the action of external force, and buckle structure is limited by limiting protrusion, to lock zipper;When needing to open zipper, buckle structure is set to be destroyed by external force, and separate with second stop block. Adopt the zipper can realize anti-theft and protect privacy function.

Description

Technical Field

[0001] This utility model relates to a zipper and an article incorporating the zipper. Background Technology

[0002] Zippers are connectors that use continuously arranged teeth to bring items together or separate them. They are widely used in clothing, bags, tents, and other products.

[0003] In zippered packaging bags, removing the product requires unzipping the bag, and existing zippers only allow for basic opening and closing. During express delivery, even if the zipper is opened to remove the product or the item is switched and then closed again, it is difficult for people to notice. Therefore, in certain scenarios, it is necessary to improve the security of zipper use.

[0004] CN200997959Y discloses a safety anti-reverse device, including a fixed box, a movable pull tab, and a safety lock plate. The fixed box is fixed to the end of the zipper. The movable pull tab is connected to the zipper pull via a connecting plate and can be installed on or separated from the fixed box. The safety lock plate is used to prevent the fixed box and the movable pull tab from separating. The structure of this safety anti-reverse device is slightly complex, making it difficult to directly modify existing conventional zipper structures.

[0005] CN222898481U discloses an anti-theft zipper pull, including a pull tab and a pull head. The pull head and pull tab are detachably connected via a cap. A plug is slidably connected through the top surface of the pull head. The pull tab includes a sheet body and a pull cord. One end of the pull cord is fixedly connected to a partition, which is fixedly installed inside the sheet body. The other end of the pull cord passes through the partition and slides in contact with it. A roller is wound around the other end of the pull cord and is rotatably connected to the partition. The end of the roller away from the partition extends out of the sheet body. A mounting hole is opened in the center of the roller. A pawl is rotatably connected to the inner wall of the mounting hole. A switch assembly is detachably connected to one end of the pawl. A first spring is fixedly connected between one side of the pawl and the inner wall of the mounting hole. The switch assembly is rotatably connected to the sheet body. This document utilizes the self-locking of the zipper pull to prevent the pull head from being illegally opened during movement. The structure of this zipper pull is relatively complex and more suitable for use on boxes. Utility Model Content

[0006] One objective of this invention is to provide a zipper that, through simple modification of existing conventional zipper structures, achieves certain anti-theft and privacy protection functions. Another objective of this invention is to provide an item with a zipper, wherein the zipper is as described above.

[0007] The present invention achieves the above objectives by adopting the following technical solution.

[0008] On one hand, this utility model provides a zipper, including a chain belt, a zipper pull, a first stop block, and a second stop block; the chain belt is configured as two pieces; each piece of chain belt has a row of chain teeth; the zipper pull includes a zipper pull body and a pull tab, the pull tab being rotatably disposed on the zipper pull body; the zipper pull body is configured to clamp the chain teeth, and is configured to cause the chain teeth on the two pieces of chain belt to engage or disengage under the pulling of the pull tab; the first stop block is connected to one end of the two pieces of chain belt, and is configured to limit the zipper pull; the second stop block is connected to the other end of the two pieces of chain belt, and is configured to limit the zipper pull.

[0009] The pull tab is provided with a through hole, and the inner sidewall of the through hole is provided with a limit protrusion;

[0010] The surface of the second stop block is provided with a snap-fit ​​structure, which matches the limiting protrusion;

[0011] When the zipper pull is pulled so that the two rows of chain teeth are fully engaged, the buckle structure is configured to be inserted into the through hole under the action of external force, and the buckle structure is limited by the limiting protrusion, thereby locking the zipper; when it is necessary to open the zipper, the buckle structure is configured to be broken by external force and separate from the second stop block.

[0012] On the other hand, this utility model also provides a zipper, including a chain belt, a zipper pull, a first stop block, and a second stop block; the chain belt is configured as two pieces; each piece of chain belt has a row of chain teeth; the zipper pull includes a zipper pull body and a pull tab, the pull tab being rotatably disposed on the zipper pull body; the zipper pull body is configured to clamp the chain teeth, and is configured to cause the chain teeth on the two pieces of chain belt to engage or disengage under the pulling of the pull tab; the first stop block is connected to one end of the two pieces of chain belt, and is configured to limit the zipper pull; the second stop block is connected to the other end of the two pieces of chain belt, and is configured to limit the zipper pull;

[0013] The pull tab is provided with a through hole, and the inner sidewall of the through hole is provided with a limit protrusion;

[0014] The zipper also includes a cylindrical structure disposed on the pull tab and coaxial with the through hole; the inner diameter of the cylindrical structure is greater than or equal to the inner diameter of the through hole.

[0015] The surface of the second stop block is provided with a snap-fit ​​structure, which matches the limiting protrusion;

[0016] When the zipper pull is pulled so that the two rows of chain teeth are fully engaged, the buckle structure is configured to be inserted into the cylindrical structure and the through hole in sequence under the action of external force, and the buckle structure is limited by the limiting protrusion, thereby locking the zipper; when it is necessary to open the zipper, the buckle structure is configured to be broken by external force and separate from the second stop block.

[0017] According to the zipper of this utility model, preferably, the cross-section of the through hole is circular or square.

[0018] According to the zipper of this utility model, preferably, the central axis of the through hole is perpendicular to both the length and width directions of the pull tab.

[0019] According to the zipper of this utility model, preferably, the limiting protrusion is configured as a ring structure, or the limiting protrusion is configured as multiple individual protrusions.

[0020] According to the zipper of this utility model, preferably, the limiting protrusion is configured as a ring structure, and the cross-section of the limiting protrusion is two right-angled trapezoids symmetrically arranged with the central axis of the through hole as the axis. The right-angled side of the right-angled trapezoid is perpendicular to the inner wall of the through hole, the length of the lower base is greater than the length of the upper base, and the lower base is set against the inner wall of the through hole. When the zipper is locked, the right-angled side is away from the second stop block, and the hypotenuse is close to the second stop block.

[0021] According to the zipper of this utility model, preferably, the buckle structure has a limiting part, a middle part and a detachable part connected in sequence, and the central axes of the three parts coincide; the detachable part is also connected to the second stop block, and the detachable part is configured to be broken and disconnected under the action of external force, thereby separating from the second stop block; the outer diameter of the surface A of the limiting part connected to the middle part is larger than the outer diameter of the surface B of the middle part connected to the limiting part; when the zipper is locked, the surface of the limiting protrusion away from the inner sidewall of the through hole abuts against the outer sidewall of the middle part, and at least a portion of the surface of the limiting protrusion away from the second stop block contacts or adheres to the surface A of the limiting part.

[0022] According to the zipper of this utility model, preferably, the outer contours of the limiting part and the middle part are configured to jointly form a mushroom-shaped structure.

[0023] According to the zipper of this utility model, preferably, the outer contour of the detachable portion is hourglass-shaped.

[0024] Furthermore, this utility model also provides an article with a zipper, which uses the zipper described above.

[0025] This utility model's zipper achieves anti-theft and privacy protection functions through simple modifications to existing conventional zipper structures. The zipper can be locked, and once locked, it can only be opened through destructive means. Furthermore, even after being opened, the zipper retains its basic functions and largely maintains the shape and structure of a conventional zipper. Specifically, it locks the zipper by using a limiting protrusion within the pull tab and a matching buckle structure on the second stop block; when it is necessary to open the zipper, the buckle structure is broken to separate it from the second stop block. This protective zipper structure is relatively simple and conducive to widespread application. Attached Figure Description

[0026] Figure 1 This is a top view of a zipper of this utility model when placed horizontally.

[0027] Figure 2 This is a schematic diagram of the structure of a zipper pull tab when the zipper is placed horizontally.

[0028] Figure 3 This is a schematic diagram showing the connection state of the second stop block and the buckle structure when the zipper is placed horizontally.

[0029] Figure 4 This is a schematic diagram of the partial structure when the zipper is locked.

[0030] Figure 5 for Figure 4 A schematic diagram showing the state of the latching structure after it has been damaged.

[0031] Figure 6 This is a schematic diagram of another implementation of the sheet pulling method.

[0032] Figure 7 This is a schematic diagram of another implementation of the snap-fit ​​structure.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1-Chain belt; 21-Latch head body; 22-Pull tab; 221-Through hole; 2211-Limiting protrusion; 23-Cylindrical structure; 3-First stop block; 4-Second stop block; 41-Snap-on structure; 411-Limiting part; 412-Middle part; 413-Detachable part. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0036] The zipper of this utility model includes a zipper belt, a zipper head (including a zipper head body and a pull tab), a first stop block and a second stop block; it also includes a snap-fit ​​structure disposed on the second stop block, and a limiting protrusion disposed within the pull tab. The limiting protrusion is used to limit the snap-fit ​​structure. Optionally, it also includes a cylindrical structure disposed on the pull tab. A detailed description follows.

[0037] <Chain>

[0038] The chain is configured as two pieces; each piece of chain has one row of teeth. The teeth on the two pieces of chain are arranged in an alternating pattern. The two rows of teeth can engage or disengage. The specific structure of the chain can refer to those known in the art, and is not particularly limited, nor will it be described in detail here.

[0039] <Pull head, first stop block and second stop block>

[0040] Pull head

[0041] The zipper pull includes a zipper body and a pull tab, which is rotatably mounted on the zipper body. The zipper body is configured to hold the zipper teeth and, when pulled by the pull tab, to engage or disengage the zipper teeth on the two zipper belts. This enables the zipper to perform its basic functions: closing or opening the zipper.

[0042] In this invention, the specific structure of the zipper head body can refer to those known in the art, and will not be described in detail here.

[0043] First stop block and second stop block

[0044] The first stop block is connected to one end of the two chain straps and is configured to limit the slider, preventing it from detaching from one end of the chain strap.

[0045] The second stop block is connected to the other end of the two chain straps and is configured to limit the zipper pull, preventing it from detaching from the other end of the chain straps. This enables the zipper to perform its basic function. The specific structures of the first and second stop blocks can be found in those known in the art.

[0046] <Limiting protrusions and snap-fit ​​structure>

[0047] Limiting protrusion

[0048] In this invention, the pull tab has a through hole, and the inner wall of the through hole has a limiting protrusion. The limiting protrusion is used to limit the buckle structure, which helps to lock the zipper, thereby achieving anti-theft and privacy protection functions.

[0049] In this invention, the cross-section of the through hole is circular or square, preferably circular. The central axis of the through hole is perpendicular to both the length and width directions of the zipper tab. The presence of a limiting protrusion within this through hole helps to limit the snap-fit ​​structure, thereby locking the zipper. Furthermore, the through hole is simply added to the existing zipper tab structure, simplifying production and not affecting the basic function of the zipper.

[0050] In this utility model, the limiting protrusion can be a ring structure or multiple individual protrusions, preferably a ring structure.

[0051] There are no particular restrictions on the specific structure of the limiting protrusion. In some preferred embodiments, the limiting protrusion is set as a ring structure, and the cross-section of the limiting protrusion is two right-angled trapezoids symmetrically arranged about the central axis of the through hole. The right-angled sides of the right-angled trapezoids are perpendicular to the inner wall of the through hole, the length of the lower base is greater than the length of the upper base, and the lower base is set against the inner wall of the through hole. When the zipper is locked, the right-angled sides are away from the second stop block, and the hypotenuses are close to the second stop block.

[0052] In other embodiments, the limiting protrusion is configured as a ring structure, and the cross-section of the limiting protrusion is two right triangles symmetrically arranged about the central axis of the through hole. One right-angled side of the right triangle is perpendicular to the inner wall of the through hole, and the other right-angled side is attached to the inner wall of the through hole. When the zipper is locked, the right-angled side perpendicular to the inner wall of the through hole is away from the second stop block, and the hypotenuse of the right triangle is close to the second stop block.

[0053] In some other embodiments, the limiting protrusions are multiple individual protrusions, which are evenly arranged along the perimeter of the inner wall of the through hole. The cross-section of each protrusion is a right trapezoid, with the right-angled side of the trapezoid perpendicular to the inner wall of the through hole. The length of the lower base is greater than the length of the upper base, and the lower base is set against the inner wall of the through hole. When the zipper is locked, the right-angled side is away from the second stop block, and the inclined side is close to the second stop block.

[0054] In some other embodiments, the limiting protrusions are multiple individual protrusions, which are evenly arranged along the perimeter of the inner wall of the through hole. The cross-section of each protrusion is a right triangle, with one right-angled side perpendicular to the inner wall of the through hole and the other right-angled side attached to the inner wall of the through hole. When the zipper is locked, the right-angled side perpendicular to the inner wall of the through hole is away from the second stop block, and the hypotenuse of the right triangle is close to the second stop block.

[0055] In this utility model, the limiting protrusion can be made of an elastic material, which allows the buckle structure to pass through the space enclosed by the limiting protrusion under the action of external force, but the limiting protrusion also has a certain degree of hardness, which can limit the buckle structure.

[0056] Buckle structure

[0057] In this invention, the surface of the second stop block is provided with a snap-fit ​​structure that matches the limiting protrusion. The snap-fit ​​structure protrudes from the surface of the second stop block. When the zipper pull is pulled to fully engage the two rows of zipper teeth, the snap-fit ​​structure is designed to be able to insert into the through hole under external force and be limited by the limiting protrusion, thereby locking the zipper. When it is necessary to open the zipper, the snap-fit ​​structure is designed to be broken by external force and separate from the second stop block. Because the zipper can be locked, it cannot be easily opened; if the zipper is maliciously opened, the user will know that the zipper has been opened because the snap-fit ​​structure is damaged. Therefore, such a zipper can achieve a certain degree of anti-theft and privacy protection. The full engagement is a near-full engagement.

[0058] In this invention, the buckle structure has a limiting part, a middle part, and a detachable part connected in sequence, and the central axes of the three parts coincide; the detachable part is also connected to the second stop block, and the detachable part is configured to be broken and disconnected under the action of external force, thereby separating from the second stop block; the outer diameter of the surface A where the limiting part is connected to the middle part is larger than the outer diameter of the surface B where the middle part is connected to the limiting part; when the zipper is locked, the surface of the limiting protrusion away from the inner wall of the through hole abuts against the outer wall of the middle part, and at least a portion of the surface of the limiting protrusion away from the second stop block contacts or adheres to the surface A of the limiting part.

[0059] According to one embodiment of this utility model, the outer contour of the limiting portion is hemispherical; the outer contour of the middle portion is cylindrical or frustum-shaped, preferably frustum-shaped, wherein the outer diameter of the surface B near the limiting portion is smaller than the outer diameter of the opposite surface (denoted as surface C). The shape of the limiting portion facilitates its insertion into the space enclosed by the limiting protrusion and its complete passage through the enclosed space. The shape of the middle portion facilitates its outer sidewall abutting or fitting against the surface of the inner sidewall of the limiting protrusion away from the through hole.

[0060] According to a specific embodiment of this utility model, the outer contours of the limiting part and the middle part together form a mushroom-shaped structure. The mushroom-shaped structure described in this application can be any similar mushroom-shaped structure.

[0061] The detachable part is designed to break under external force and is made of plastic. According to one embodiment of the present invention, the outer contour of the detachable part is hourglass-shaped. The hourglass shape described in this application can be similar to an hourglass. According to another embodiment of the present invention, the cross-section of the detachable part consists of a triangle and a rectangle, wherein the triangle is an isosceles triangle, the base of which is connected to the second stop block, and the rectangle passes through the apex of the isosceles triangle and is perpendicular to the second stop block, with the other end of the rectangle connected to the middle part of the snap-fit ​​structure.

[0062] In practical applications, the color of the buckle structure can be set to be relatively bright (such as red or orange), which is more eye-catching compared to the colors of other parts of the zipper, making it easy to identify. The zipper is locked by the limiting protrusion of the pull tab and the buckle structure. When the buckle structure is broken, it will be stuck in the pull tab and cannot be removed. At this time, it can be seen from the pull tab that the zipper has been used and damaged, which is also easy for users to identify.

[0063] cylindrical structure

[0064] The zipper also includes a tubular structure, which is mounted on the pull tab and coaxial with the through hole; the inner diameter of the tubular structure is greater than or equal to the inner diameter of the through hole. When the overall thickness of the pull tab is relatively thin, a tubular structure can be incorporated into the pull tab to allow the limiting protrusion and the tubular structure to better match the snap-fit ​​mechanism.

[0065] The cylindrical structure is cylindrical in shape.

[0066] When the zipper pull is pulled, causing the two rows of zipper teeth to fully engage, the latching structure can be inserted sequentially into the cylindrical structure and the through hole under external force. The latching structure is then limited by the limiting protrusion, thus locking the zipper. When it is necessary to open the zipper, the latching structure can be broken by external force and separate from the second stop block.

[0067] <Items with zippers>

[0068] This utility model also provides an item with a zipper, which uses the zipper described above. The item can be a courier bag, packaging bag, backpack, suitcase, etc.

[0069] According to a specific embodiment of the present invention, a packaging bag with a zipper is provided, which uses the zipper as described above.

[0070] Example 1

[0071] Figure 1 This is a top view of a zipper of this utility model when placed horizontally (the limiting protrusion is not shown). Figure 2 This is a front view diagram of a zipper pull tab when the zipper is placed horizontally.

[0072] Figure 3 This is a schematic diagram showing the connection state of the second stop block and the buckle structure when the zipper is placed horizontally.

[0073] Figure 4 This is a schematic diagram showing the state of the part of the zipper that is locked. Figure 5 for Figure 4 A schematic diagram showing the state of the latching structure after it has been damaged.

[0074] like Figure 1As shown, a zipper in this embodiment includes a zipper belt 1, a zipper pull, a first stop block 3, and a second stop block 4. The zipper belt 1 consists of two pieces. Each piece of the zipper belt has a row of teeth. The zipper pull includes a zipper pull body 21 and a pull tab 22. The pull tab 22 is rotatably mounted on the zipper pull body 21. The zipper pull body 21 can hold the teeth, and under the pull of the pull tab 22, the teeth on the two pieces of the zipper belt 1 can be engaged or disengaged, thereby closing or opening the zipper. The first stop block 3 is connected to one end of the two pieces of the zipper belt 1 and is used to limit the zipper pull to prevent it from falling off from one end of the zipper belt 1. The second stop block 4 is connected to the other end of the two pieces of the zipper belt 1 and is used to limit the zipper pull to prevent it from falling off from the other end of the zipper belt 1.

[0075] like Figures 2 to 5 As shown, the pull tab 22 is provided with a through hole 221, the cross-section of which is circular. The central axis of the through hole 221 is perpendicular to both the length and width directions of the pull tab 22. A limiting protrusion 2211 is provided on the inner sidewall of the through hole 221 to limit the snap-fit ​​structure 41.

[0076] like Figure 1 , Figure 3 and Figure 4 As shown, the surface of the second stop block 4 is provided with a snap-fit ​​structure 41, which matches the limiting protrusion 2211.

[0077] like Figure 1 , Figure 4 and Figure 5 As shown, when the zipper pull is pulled to fully engage the two rows of chain teeth, the latching structure 41 can be inserted into the through hole 221 under the action of external force, and the latching structure 41 is limited by the limiting protrusion 2211, thereby locking the zipper. When it is necessary to open the zipper, the latching structure 41 can be broken by external force and separated from the second stop block 4.

[0078] In this embodiment, the limiting protrusion 2211 is a ring structure. For example... Figure 2 and Figure 4 As shown, the cross-section of the limiting protrusion 2211 consists of two right-angled trapezoids symmetrically arranged about the central axis of the through hole 221. The right-angled sides of these trapezoids are perpendicular to the inner wall of the through hole 221, and the length of the lower base is greater than the length of the upper base. The lower base is set against the inner wall of the through hole 221. When the zipper is locked, the right-angled sides are away from the second stop block 4, and the hypotenuses are close to the second stop block 4.

[0079] like Figure 3 , Figure 4 and Figure 5As shown, the buckle structure 41 has a limiting part 411, a middle part 412, and a detachable part 413 connected in sequence, and the central axes of the three parts coincide. The detachable part 413 is also connected to the second stop block 4. The detachable part 413 can be broken and separated from the second stop block 4 under the action of external force, so that the zipper can be opened under the action of external force. The outer contour of the detachable part 413 is hourglass-shaped. Specifically, the diameters at both ends are D1, and the diameter at the narrowest point in the middle is D2 (D2 < D1). The two ends and the middle are transitioned by an arc; the breakable area is the narrowest section in the middle. The outer contour of the limiting part 411 is hemispherical. Its structure includes an approximately hemispherical curved surface and a plane that closes the opening of the curved surface (this plane is denoted as surface A). The outer contour of the middle part is frustum-shaped. The middle part has surfaces B and C arranged relatively parallel to each other. The outer diameter of surface B is smaller than the outer diameter of surface C. The limiting part 411 is connected to surface B of the middle part through surface A. The outer diameter of surface A is larger than the outer diameter of surface B. The outer diameter of surface A is smaller than the outer diameter of surface C. The outer contours of the limiting part 411 and the intermediate part 412 together form a mushroom-like structure. The outer diameter of the surface of the detachable part 413 connected to the intermediate part 412 is smaller than the outer diameter of surface C of the intermediate part 412, and also smaller than the outer diameter of surface B. The snap-fit ​​structure 41 can be a one-piece molded structure.

[0080] When the zipper is locked, the surface of the limiting protrusion 2211 away from the inner wall of the through hole 221 abuts against the outer wall of the middle part 412, and at least a portion of the surface of the limiting protrusion 2211 away from the second stop block 4 contacts or adheres to the surface A of the limiting part 411.

[0081] The following is a description of how to use the zipper in this embodiment:

[0082] After pulling the zipper to the stop position of the second stop block 4 (with the two rows of chain teeth in an engaged state), align the buckle structure 41 with the through hole 221 of the pull tab 22, press the pull tab 22, and buckle the pull tab 22 onto the buckle structure 41. The limiting protrusion 2211 limits the buckle structure 41, thereby locking the zipper.

[0083] Once the zipper is locked, the zipper cannot be opened without damage because the latch structure 41 is limited by the limiting protrusion 2211. To open the zipper again, the pull tab 22 needs to be pulled forcefully. At this time, the detachable part 413 of the latch structure 41 breaks and separates from the second stop block 4. Most of the latch structure 41 will be stuck in the pull tab 22 after breaking and cannot be removed. At this point, it can be seen from the pull tab 22 that the zipper has been used and damaged. In addition, the damage to the latch structure 41 does not affect the basic function of the zipper, and the zipper can continue to be used, which is also environmentally friendly.

[0084] Example 2

[0085] Except for the following differences, the rest of the structure is the same as in Example 1:

[0086] The limiting protrusions 2211 are multiple individual protrusions, for example, three or more, which are evenly distributed along the circumference of the through hole 221 on the inner wall of the through hole 221. The cross-section of a single limiting protrusion 2211 is a right-angled trapezoid, with the right-angled side perpendicular to the inner wall of the through hole 221. The length of the lower base is greater than the length of the upper base, and the lower base is set against the inner wall of the through hole 221. When the zipper is locked, the right-angled side is away from the second stop block 4, and the hypotenuse is close to the second stop block 4.

[0087] Example 3

[0088] Except for the following differences, the rest of the structure is the same as in Example 1:

[0089] like Figure 7 As shown, the cross-section of the detachable portion 413 of the snap-fit ​​structure 41 consists of a triangle and a rectangle. The triangle is an isosceles triangle, with its base connected to the second stop block 4. The rectangle passes through the apex of the isosceles triangle and is perpendicular to the second stop block 4. The other end of the rectangle is connected to the middle portion 412 of the snap-fit ​​structure 4. The disconnection area is in the rectangular portion of the detachable portion 413, specifically the rectangular section located between the middle portion 412 and the isosceles triangle. The outer contour of the rectangular portion can be cylindrical, for example. The outer contour of the triangular portion can be conical. Note: This cross-section passes through the central axis of the middle portion 412.

[0090] Example 4

[0091] like Figure 1 , Figure 3 and Figure 6 As shown, this embodiment provides a zipper including a chain belt 1, a zipper pull, a first stop block 3, and a second stop block 4. The chain belt 1 consists of two pieces. Each piece of chain belt 1 has a row of chain teeth. The zipper pull includes a zipper pull body 21 and a pull tab 22. The pull tab 22 is rotatably mounted on the zipper pull body 21. The zipper pull body 21 can hold the chain teeth, and under the pull of the pull tab 22, the chain teeth on the two pieces of chain belt 1 can be engaged or disengaged, thereby closing or opening the zipper. The first stop block 3 is connected to one end of the two pieces of chain belt 1 and is used to limit the zipper pull to prevent it from falling off from one end of the chain belt 1. The second stop block 4 is connected to the other end of the two pieces of chain belt 1 and is used to limit the zipper pull to prevent it from falling off from the other end of the chain belt 1.

[0092] The pull tab 22 has a through hole 221, the cross-section of which is circular. The central axis of the through hole 221 is perpendicular to both the length and width directions of the pull tab 22. A limiting protrusion 2211 is provided on the inner wall of the through hole 221 to limit the locking structure 41. When the overall thickness of the pull tab 11 is relatively thin, a cylindrical structure 23 is provided on the pull tab 22. The cylindrical structure 23 is cylindrical in shape. The cylindrical structure 23 is coaxial with the through hole 221. The inner diameter of the cylindrical structure 23 is greater than or equal to the inner diameter of the through hole 221.

[0093] The surface of the second stop block 4 is provided with a snap-fit ​​structure 41, which matches the limiting protrusion 2211. When the zipper pull is pulled so that the two rows of zipper teeth are fully engaged, the snap-fit ​​structure 41 can be inserted into the cylindrical structure 23 and the through hole 221 in sequence under the action of external force, and the limiting protrusion 2211 limits the snap-fit ​​structure 41, thereby locking the zipper. When it is necessary to open the zipper, the snap-fit ​​structure 41 can be broken by external force and separated from the second stop block 4.

[0094] In this embodiment, the limiting protrusion 2211 is a ring structure. For example... Figure 2 As shown, the cross-section of the limiting protrusion 2211 consists of two right-angled trapezoids symmetrically arranged about the central axis of the through hole 221. The right-angled sides of these trapezoids are perpendicular to the inner wall of the through hole 221, and the length of the lower base is greater than the length of the upper base. The lower base is set against the inner wall of the through hole 221. When the zipper is locked, the right-angled sides are away from the second stop block 4, and the hypotenuses are close to the second stop block 4.

[0095] like Figure 3As shown, the buckle structure 41 has a limiting part 411, a middle part 412, and a detachable part 413 connected in sequence, and the central axes of the three parts coincide. The detachable part 413 is also connected to the second stop block 4. The detachable part 413 can be broken and disconnected under the action of external force, thereby separating from the second stop block 4, so that the zipper can be opened. The outer contour of the detachable part 413 is hourglass-shaped. Specifically, the diameters at both ends are D1, and the diameter at the narrowest point in the middle is D2 (D2 < D1). The two ends and the middle are transitioned by an arc; the disconnection area is designed to be the narrowest section in the middle. The outer contour of the limiting part 411 is hemispherical. Its structure includes an approximately hemispherical curved surface and a plane that closes the opening of the curved surface (this plane is denoted as surface A). The outer contour of the middle part is frustum-shaped. The middle part has surfaces B and C arranged relatively parallel to each other. The outer diameter of surface B is smaller than the outer diameter of surface C. The limiting part 411 is connected to surface B of the middle part through surface A. The outer diameter of surface A is larger than the outer diameter of surface B. The outer diameter of surface A is smaller than the outer diameter of surface C. The outer contours of the limiting part 411 and the intermediate part 412 together form a mushroom-like structure. The outer diameter of the surface on which the detachable part 413 is connected to the intermediate part 412 is smaller than the outer diameter of surface C of the intermediate part 412, and also smaller than the outer diameter of surface B. The snap-fit ​​structure 41 can be a one-piece molded structure.

[0096] When the zipper is locked, the surface of the limiting protrusion 2211 away from the inner wall of the through hole 221 abuts against the outer wall of the middle part 412, and at least a portion of the surface of the limiting protrusion 2211 away from the second stop block 4 contacts or adheres to the surface A of the limiting part 411.

[0097] Example 5

[0098] This embodiment provides a packaging bag with a zipper, which uses the zipper of Embodiment 1.

[0099] Example 6

[0100] This embodiment provides a packaging bag with a zipper, which uses the zipper of Embodiment 2.

[0101] Example 7

[0102] This embodiment provides a packaging bag with a zipper, which uses the zipper of Embodiment 3.

[0103] Example 8

[0104] This embodiment provides a packaging bag with a zipper, which uses the zipper of Embodiment 4.

[0105] Example 9

[0106] This embodiment provides a zippered express bag, which uses the zipper of Embodiment 1.

[0107] Example 10

[0108] This embodiment provides a suitcase with a zipper, which uses the zipper of Embodiment 1.

[0109] This utility model is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this utility model fall within the scope of this utility model.

Claims

1. A zipper, comprising a zipper belt, a zipper pull, a first stop block, and a second stop block; the zipper belt is configured as two pieces; each piece of the zipper belt has a row of teeth; the zipper pull includes a zipper pull body and a pull tab, the pull tab being rotatably disposed on the zipper pull body; the zipper pull body is configured to clamp the teeth, and is configured to cause the teeth on the two pieces of the zipper belt to engage or disengage under the pulling of the pull tab; the first stop block is connected to one end of the two pieces of the zipper belt and is configured to limit the zipper pull; the second stop block is connected to the other end of the two pieces of the zipper belt and is configured to limit the zipper pull; characterized in that, The pull tab is provided with a through hole, and the inner sidewall of the through hole is provided with a limit protrusion; The surface of the second stop block is provided with a snap-fit ​​structure, which matches the limiting protrusion; When the zipper pull is pulled so that the two rows of chain teeth are fully engaged, the buckle structure is configured to be inserted into the through hole under the action of external force, and the buckle structure is limited by the limiting protrusion, thereby locking the zipper; when it is necessary to open the zipper, the buckle structure is configured to be broken by external force and separate from the second stop block.

2. A zipper, comprising a zipper belt, a zipper pull, a first stop block, and a second stop block; the zipper belt is configured as two pieces; each piece of the zipper belt has a row of teeth; the zipper pull includes a zipper pull body and a pull tab, the pull tab being rotatably disposed on the zipper pull body; the zipper pull body is configured to clamp the teeth and, when pulled by the pull tab, cause the teeth on the two pieces of the zipper belt to engage or disengage; the first stop block is connected to one end of the two pieces of the zipper belt and is configured to limit the zipper pull; the second stop block is connected to the other end of the two pieces of the zipper belt and is configured to limit the zipper pull; characterized in that, The pull tab is provided with a through hole, and the inner sidewall of the through hole is provided with a limit protrusion; The zipper also includes a cylindrical structure disposed on the pull tab and coaxial with the through hole; the inner diameter of the cylindrical structure is greater than or equal to the inner diameter of the through hole. The surface of the second stop block is provided with a snap-fit ​​structure, which matches the limiting protrusion; When the zipper pull is pulled so that the two rows of chain teeth are fully engaged, the buckle structure is configured to be able to be inserted into the cylindrical structure and the through hole in sequence under the action of external force, and the buckle structure is limited by the limiting protrusion, thereby locking the zipper; when it is necessary to open the zipper, the buckle structure is configured to be able to be broken by external force and separate from the second stop block.

3. The zipper according to claim 1 or 2, characterized in that, The cross-section of the through hole is circular or square.

4. The zipper of claim 3, wherein, The central axis of the through hole is perpendicular to both the length and width directions of the pull tab.

5. The zipper according to claim 1 or 2, wherein The limiting protrusion is configured as a ring structure, or the limiting protrusion is configured as multiple individual protrusions.

6. The zipper of claim 5, wherein, The limiting protrusion is configured as a ring structure. The cross-section of the limiting protrusion consists of two right-angled trapezoids symmetrically arranged with the central axis of the through hole as the axis. The right-angled side of the right-angled trapezoid is perpendicular to the inner wall of the through hole. The length of the lower base is greater than the length of the upper base. The lower base is set against the inner wall of the through hole. When the zipper is locked, the right-angled side is away from the second stop block, and the hypotenuse is close to the second stop block.

7. The zipper of claim 1 or 2, wherein The buckle structure has a limiting part, a middle part, and a detachable part connected in sequence, and the central axes of the three parts coincide; the detachable part is also connected to the second stop block, and the detachable part is configured to be broken and disconnected under the action of external force, thereby separating from the second stop block; the outer diameter of the surface A of the limiting part connected to the middle part is larger than the outer diameter of the surface B of the middle part connected to the limiting part; when the zipper is locked, the surface of the limiting protrusion away from the inner sidewall of the through hole abuts against the outer sidewall of the middle part, and at least a portion of the surface of the limiting protrusion away from the second stop block contacts or adheres to the surface A of the limiting part.

8. The zipper of claim 7, wherein, The outer contours of the limiting part and the middle part are configured to form a mushroom-shaped structure together.

9. The zipper of claim 7, wherein, The outer contour of the detachable part is hourglass-shaped.

10. An article with a zipper, characterized in that, It uses a zipper as described in any one of claims 1 to 9.

Images