Anti-theft zipper

Abstract

The application relates to an anti-theft zipper, which comprises a zipper tape and a zipper head. The zipper tape is provided with zipper teeth. The zipper head comprises an upper clamping base, a lower clamping base and a stand column. The two ends of the stand column are connected to the upper clamping base and the lower clamping base respectively. A connecting seat is arranged on the side wall of the upper clamping base away from the lower clamping base. The connecting seat is provided with a connecting channel. A puller is detachably installed on the connecting channel. A limiting piece is slidably installed on the side wall of the lower clamping base close to the upper clamping base. The limiting piece is elastically arranged to abut against the inner side of the zipper teeth. A limiting assembly is arranged between the limiting piece and the connecting channel. When the puller is separated from the connecting channel, the limiting assembly forces the limiting piece to abut against the inner side of the zipper teeth and to be deformed. The anti-theft zipper can make the zipper have an anti-theft effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of zippers, in particular to a theftproof zipper. BACKGROUND

[0002] Zippers are commonly used daily necessities in our life, which have the advantages of convenient and fast opening and closing, and are widely used in various fields, especially on clothes or backpacks.

[0003] In the prior art, a zipper includes two zipper tapes, zipper teeth fixed on the zipper tapes, and a zipper head for engaging or opening the zipper teeth on the two zipper tapes, and a puller installed on the zipper head for pulling the zipper head; when the zipper is applied to a backpack (especially a travel bag), in order to improve the anti-theft effect of the backpack, the zipper head of such a backpack zipper is usually provided with two, and a through hole is formed on the puller of each zipper head, and after the zipper head is engaged with the two zipper tapes, a safety lock is sequentially threaded through the through holes of the two pullers and locked, so that the two zipper heads are connected as a whole, thereby making the zipper unable to be opened and keeping the closed state, and improving the anti-theft effect of the overall structure.

[0004] However, when such a zipper is theftproof, at least two zipper heads are needed, and the consumer needs to additionally purchase a safety lock, which increases the use cost of the consumer; in addition, when the zipper does not need to be locked, the safety lock needs to be stored in the backpack, which occupies the storage space of the backpack, and is relatively inconvenient, so further improvement is needed. SUMMARY

[0005] In order to make the zipper have an anti-theft effect, the present application provides a theftproof zipper.

[0006] The theftproof zipper provided by the present application adopts the following technical scheme:

[0007] A theftproof zipper includes a zipper tape and a zipper head, the zipper tape is provided with zipper teeth, the zipper head includes an upper clamp seat, a lower clamp seat and a stand, the two ends of the stand are connected to the upper clamp seat and the lower clamp seat respectively; the side wall of the upper clamp seat away from the lower clamp seat is provided with a connecting seat, the connecting seat has a connecting channel, and the connecting channel is detachably installed with a puller; the side wall of the lower clamp seat close to the upper clamp seat is slidingly installed with a limiting piece, the limiting piece is elastically arranged to abut against the inner side of the zipper teeth; a limiting assembly is arranged between the limiting piece and the connecting channel, when the puller is separated from the connecting channel, the limiting assembly forces the limiting piece to abut against the inner side of the zipper teeth and to be deformed.

[0008] By adopting the technical scheme, the puller is pulled to make the zipper head engage with the zipper tape, and then the puller is detached, on the one hand, after the puller is lost, the difficulty of driving the zipper head to slide along the length direction of the zipper tape is increased, thereby the operation difficulty of the thief to open the zipper through the zipper head is improved; on the other hand, after the puller is detached from the connecting channel, the limiting sheet is abutted against the inner side of the zipper tooth and deformed under the action of the limiting assembly, the friction between the limiting sheet and the zipper tooth is increased, the zipper head is not easy to slide along the length direction of the zipper tape, when people carry the backpack provided with the zipper on the back, the thief wants to open the zipper by secretly sliding the zipper head, needs more force to overcome the friction between the limiting sheet and the zipper tooth, and the zipper head is without the puller, the more force is easy to cause the greater reaction of the backpack (such as the deformation or abnormal sound of the backpack), so that people can timely perceive the behavior of the thief, thereby the zipper has the anti-theft effect, and the safety performance of the overall structure is improved.

[0009] Optionally, the side wall of the upper clamping seat away from the lower clamping seat is provided with a first sliding groove communicated with the connecting channel, and the side wall of the lower clamping seat close to the upper clamping seat is provided with a second sliding groove; the limiting assembly comprises a first sliding sheet slidingly installed in the first sliding groove, a second sliding sheet slidingly installed in the second sliding groove and a limiting piece, the first sliding sheet and the second sliding sheet are provided with a linkage rod therebetween, and the limiting sheet is fixed to the side wall of the second sliding sheet close to the upper clamping seat; the limiting piece is arranged on the second sliding sheet, the limiting piece normally makes the limiting sheet move out of the second sliding groove and abut against the inner side of the zipper tooth, and the first sliding sheet is partially exposed out of the first sliding groove; when the puller is installed in the connecting channel, the puller forces the first sliding sheet to move into the first sliding groove, and the limiting sheet sinks in the second sliding groove.

[0010] By adopting the technical scheme, the first sliding sheet, the second sliding sheet and the limiting piece are arranged, the first sliding sheet and the second sliding sheet are connected into a whole through the linkage rod therebetween; after the puller is installed in the connecting channel, the puller can push the first sliding sheet to move into the first sliding groove, the second sliding sheet sinks the limiting sheet in the second sliding groove under the action of the first sliding sheet, so that the limiting sheet cannot contact the zipper tooth, so that people can pull the zipper head through the puller to force the zipper head to engage or open the zipper tape, and the sliding smoothness of the zipper head is improved; when the puller is detached from the connecting channel, the second sliding sheet drives the limiting sheet to move out of the second sliding groove under the action of the limiting piece, so that the limiting sheet can abut against the inner side of the zipper tooth and be deformed, to limit the sliding of the zipper head, and the anti-theft effect of the zipper is improved.

[0011] Optionally, the pull-tab is provided with a connecting rod for being inserted into the connecting channel, the connecting rod normally forces the first sliding piece to be inserted into the first sliding groove and the first sliding piece is flush with the side wall of the upper clamping seat away from the lower clamping seat; the outer peripheral wall of the connecting rod is provided with a first cutting surface for abutting against the first sliding piece, when the first cutting surface abuts against the first sliding piece, the limiting piece is flush between the side wall of the lower clamping seat close to the upper clamping seat and the inner side of the zipper teeth.

[0012] By adopting the above technical scheme, through the setting of the connecting rod and the first cutting surface, the connecting rod normally forces the first sliding piece to be inserted into the first sliding groove, the second sliding piece moves the limiting piece into the second sliding groove under the action of the first sliding piece, so that the zipper head can smoothly slide along the length direction of the zipper tape, thereby improving the smoothness of the zipper opening or closing; after the zipper head is engaged with the zipper tape, the pull-tab is turned to force the first cutting surface of the connecting rod to abut against the first sliding piece, at this time the limiting piece is in contact with the inner side of the zipper teeth under the action of the limiting member, the contact area between the zipper head and the zipper teeth is increased, the position of the zipper head is more easily maintained, and the possibility of free sliding of the zipper head along the length direction of the zipper tape is reduced.

[0013] Optionally, the first cutting surface is arranged parallel to the surface of the pull-tab, when the first cutting surface abuts against the first sliding piece, the pull-tab is in contact with the side wall of the upper clamping seat away from the lower clamping seat.

[0014] By adopting the above technical scheme, after the zipper head is engaged with the zipper tape, the pull-tab is turned to force the surface of the pull-tab to be in contact with the side wall of the upper clamping seat away from the lower clamping seat, at this time the first cutting surface is rotated to be parallel to the surface of the first sliding piece, the first sliding piece abuts against the first cutting surface under the action of the limiting member, thereby limiting the connecting rod, so that the pull-tab can be as much as possible to maintain the contact with the side wall of the upper clamping seat away from the lower clamping seat, reducing the possibility of the pull-tab swinging randomly during people walking; at the same time, after the first sliding piece abuts against the first cutting surface, the limiting piece is in contact with the inner side of the zipper teeth, so that the zipper head is not easy to slide freely, and the structural stability after the zipper is closed is improved.

[0015] Optionally, the connecting seat comprises a connecting strip, a first mounting strip and a second mounting strip, one end of the first mounting strip is fixed to one end of the connecting strip, and the other end is fixed to the side wall of the upper clamping seat away from the lower clamping seat, one end of the second mounting strip is hingedly connected to the end of the connecting strip away from the first mounting strip, and the free end of the second mounting strip is used for being connected with the upper clamping seat, the connecting strip, the first mounting strip and the second mounting strip combine to form the connecting channel; the first opening and closing member is arranged between the free end of the second mounting strip and the upper clamping seat, and the free end of the second mounting strip is detachably mounted on the upper clamping seat through the first opening and closing member, so as to open and close the connecting channel.

[0016] By adopting the technical scheme, when the pull tab is disassembled and assembled, the free end of the second mounting strip is separated from the upper clamping seat through the first opening and closing member, and then the second mounting strip is rotated, so that the connecting channel is opened, thereby facilitating the assembly or disassembly of the pull tab, and the pull tab can be detachably mounted on the connecting channel.

[0017] Optionally, the upper clamping seat is provided with a first limiting hole communicated with the first sliding groove on the side wall away from the lower clamping seat, and the free end of the second mounting strip is provided with a second limiting hole, the first limiting hole and the second limiting hole are oppositely arranged when the free end of the second mounting strip is rotated to be opposite to the upper clamping seat; the first opening and closing member comprises a limiting rod and a pushing ring, the limiting rod is slidingly installed in the first limiting hole and connected with the first sliding piece, and the limiting rod is inserted into the second limiting hole when the first sliding piece is flush with the side wall of the upper clamping seat away from the lower clamping seat or the first sliding piece is partially exposed to the first sliding groove; the pushing ring is arranged on the outer circumferential wall of the connecting rod, and the pushing ring is used to push the first sliding piece to sink in the first sliding groove so that the limiting rod is separated from the second limiting hole.

[0018] By adopting the technical scheme, the limiting rod is connected with the first sliding piece, the first sliding piece is flush with the side wall of the upper clamping seat away from the lower clamping seat or the first sliding piece is partially exposed to the first sliding groove under the action of the limiting member, the limiting rod is inserted into the second limiting hole, thereby limiting the free end of the second mounting strip, and the first mounting strip, the second mounting strip and the connecting strip are combined to form a closed loop connecting channel; when the pull tab needs to be disassembled and assembled, the first sliding piece is pushed by the pushing ring, the first sliding piece is forced to sink in the first sliding groove, the first sliding piece drives the limiting rod to slide and separate from the second limiting hole, thereby opening the connecting channel, and the disassembly and assembly convenience of the pull tab is improved.

[0019] Optionally, the upper clamping seat is provided with a first avoiding groove on the side wall away from the lower clamping seat on one side of the first sliding groove, the pushing ring is partially embedded in the first avoiding groove in a normal state, and the outer circumferential wall of the pushing ring is provided with a second cutting surface flush with the first cutting surface.

[0020] By adopting the technical scheme, the pushing ring is embedded in the first avoiding groove under normal conditions, the first avoiding groove provides space for installation of the pushing ring, and the pushing ring is located on one side of the first sliding groove under normal conditions; when it is needed to open the connecting channel, first, the pull-tab is flipped to drive the connecting rod to rotate, so that the first cutting surface of the connecting rod abuts against the surface of the first sliding piece; second, the second cutting surface is flush with the first cutting surface, so that the pull-tab can be pulled to slide along the axial direction of the connecting rod, and the pushing ring is moved to the surface of the first sliding piece; third, the pull-tab is flipped, the pushing ring can push the first sliding piece and force the first sliding piece to sink in the first sliding groove, so that the second installation strip can be opened, and the connecting channel is opened in three steps, and the possibility of losing the pull-tab due to misoperation is reduced.

[0021] Optionally, the first sliding piece is provided with a second avoiding groove away from the side wall of the lower clamping seat, when the pushing ring pushes the first sliding piece to sink in the first sliding groove, the pushing ring abuts against the bottom wall of the second avoiding groove; the upper clamping seat is provided with a third avoiding groove away from the side wall of the lower clamping seat, the third avoiding groove is communicated with the second avoiding groove for moving the pushing ring out of the side wall of the upper clamping seat away from the lower clamping seat.

[0022] By adopting the technical scheme, when the pull-tab is disassembled, the pull-tab needs to be moved, the pushing ring of the connecting rod is moved to the second avoiding groove, and the third avoiding groove is used to move out of the connecting channel, and the possibility of losing the pull-tab due to misoperation is further reduced.

[0023] Optionally, the second avoiding groove is provided with a guide surface on the side close to the third avoiding groove, the guide surface is used to move the first sliding piece towards the side close to the lower clamping seat.

[0024] By adopting the technical scheme, the second installation rod is flipped to force the second installation rod to rotate to open the opening of the connecting channel, then the pushing ring of the pull-tab connecting rod abuts against the bottom wall of the third avoiding groove, and the pull-tab is pushed along the third avoiding groove towards the second avoiding groove, the pushing ring is moved along the third avoiding groove to the second avoiding groove, under the action of the guide surface, the pushing ring can drive the second sliding piece to move towards the side close to the lower clamping seat through the guide surface, so that the pushing ring can enter the second avoiding groove, and the connecting rod can enter the connecting channel, and the installation convenience of the pull-tab is improved.

[0025] Optionally, one end of the connecting rod is hinged to one side of the pull-tab, the free end of the connecting rod and the pull-tab are provided with a second opening and closing piece, and the free end of the connecting rod is detachably installed on the pull-tab through the second opening and closing piece.

[0026] By adopting the technical scheme, the free end of the connecting rod is separated from the pull tab through the second opening and closing member when the pull tab is disassembled and assembled, and then the connecting rod is inserted into or out of the connecting channel, so that the pull tab can be disassembled and assembled in the connecting channel, and the convenience of disassembling and assembling the pull tab is improved.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By setting the limiting piece and the limiting assembly, pulling the pull tab and making the zipper head engage with the zipper tape, then disassembling the pull tab, on the one hand, after losing the pull tab, the difficulty of driving the zipper head to slide along the length direction of the zipper tape is increased, thereby improving the operation difficulty of the thief to open the zipper through the zipper head; on the other hand, after the pull tab is separated from the connecting channel, the limiting piece is abutted to the inner side of the zipper tooth under the action of the limiting assembly and deformed, the friction between the zipper head and the zipper tooth is improved, the zipper head is not easy to slide along the length direction of the zipper tape, when people carry the backpack provided with the zipper on the back, the thief wants to open the zipper by secretly sliding the zipper head, needs more force to overcome the friction between the limiting piece and the zipper tooth, and the zipper head loses the pull tab, more force is easy to cause the backpack to react more (such as deformation or abnormal sound), so that people can timely perceive the behavior of the thief, thereby the zipper has the anti-theft effect, and the safety performance of the overall structure is improved;

[0029] 2. By setting the connecting rod and the first cutting surface, the connecting rod normally forces the first sliding piece to be embedded in the first sliding groove, and the second sliding piece is moved into the second sliding groove under the action of the first sliding piece, so that the zipper head can smoothly slide along the length direction of the zipper tape, thereby improving the smoothness of opening or closing the zipper; after the zipper head engages with the zipper tape, the pull tab is rotated to force the first cutting surface of the connecting rod to abut against the first sliding piece, at this time, the limiting piece is fitted with the inner side of the zipper tooth under the action of the limiting member, the contact area between the zipper head and the zipper tooth is increased, the position of the zipper head is more easily maintained, and the possibility of free sliding of the zipper head along the length direction of the zipper tape is reduced;

[0030] 3. By the setting of the first avoiding slot and the second cutting surface, the push ring is embedded in the first avoiding slot in normal state, the first avoiding slot provides space for the installation of the push ring, so that the push ring is located on one side of the first sliding slot in normal state, when it is needed to open the connecting channel, the first step is to turn over the pull tab, drive the connecting rod to rotate, so that the first cutting surface of the connecting rod abuts against the surface of the first sliding piece; the second step is that, since the second cutting surface is flush with the first cutting surface, the pull tab can be pulled to slide along the axial direction of the connecting rod, so that the push ring moves to the surface of the first sliding piece; the third step is to turn over the pull tab, the push ring can push the first sliding piece and force the first sliding piece to sink in the first sliding slot, so that the second installation strip can be opened, so as to open the connecting channel; the opening of the connecting channel is completed in three steps, which reduces the possibility of losing the pull tab due to misoperation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of example 1;

[0032] Figure 2 is a schematic diagram of the structure of the zipper head of example 1;

[0033] Figure 3 is a partial sectional view of the limiting component of example 1;

[0034] Figure 4 is a partial sectional view of the first cutting surface abutting against the first sliding piece of example 1;

[0035] Figure 5 is a schematic diagram of the structure of the push ring moving to the second avoiding slot of example 1;

[0036] Figure 6 is a schematic diagram of the structure of the pull tab disassembled from the connecting channel of example 1;

[0037] Figure 7 is a partial sectional view of the pull tab disassembled from the connecting channel of example 1;

[0038] Figure 8 is a schematic diagram of the structure of the second opening and closing member of example 2;

[0039] Figure 9 is a schematic diagram of the structure of the abutting strip of example 2;

[0040] Figure 10 is a partial sectional view of the moving slot of example 2.

[0041] Explanation of reference signs: 1, zipper tape; 11, zipper teeth; 2, zipper head; 21, upper clamping seat; 211, first sliding groove; 212, first limiting hole; 213, first avoiding groove; 214, third avoiding groove; 22, lower clamping seat; 221, second sliding groove; 23, vertical column; 24, limiting sheet; 25, joint channel; 26, joint part; 3, connecting seat; 31, connecting channel; 32, connecting strip; 33, first mounting strip; 34, second mounting strip; 341, second limiting hole; 4, pull tab; 41, connecting rod; 411, first cutting surface; 412, butt joint rod; 42, pull strip; 421, moving groove; 422, second magnet; 5, limiting assembly; 51, first sliding sheet; 511, second avoiding groove; 512, guide surface; 513, butt joint sheet; 52, second sliding sheet; 53, limiting piece; 54, linkage rod; 6, first opening and closing piece; 61, limiting rod; 62, pushing ring; 621, second cutting surface; 7, clamping block; 71, clamping groove; 72, guide surface; 8, abutting strip; 81, first magnet; 9, moving strip; 91, anti-skid convex grain. DETAILED DESCRIPTION

[0042] The following will be described in detail below with reference to the accompanying drawings. Figures 1-10 The application is further described in detail.

[0043] Embodiment 1

[0044] The embodiment of the application discloses an anti-theft zipper.

[0045] Reference Figure 1 , Figure 2 An anti-theft zipper comprises a zipper tape 1 and a zipper head 2. In the embodiment, two zipper tapes 1 are arranged, and a plurality of zipper teeth 11 are arranged on each zipper tape 1 and are arranged at intervals along the length direction of the zipper tape 1. The zipper head 2 is arranged between the two zipper tapes 1 and is driven to slide along the length direction of the zipper tape 1, so that the zipper teeth 11 of the two zipper tapes 1 are engaged or separated.

[0046] Reference Figure 2 , Figure 3In the embodiment, the slider 2 comprises an upper clamp base 21, a lower clamp base 22 and a column 23, two ends of the column 23 are connected to the side walls of the upper clamp base 21 and the lower clamp base 22 respectively, so that the upper clamp base 21 and the lower clamp base 22 are arranged at intervals and form an engagement channel 25 for the two zipper tapes 1 to pass through; the side walls of the upper clamp base 21 and the lower clamp base 22 close to each other are provided with an engagement part 26, the engagement part 26 is used for engaging the zipper teeth 11 of the two zipper tapes 1 passing through the engagement channel 25; the slider 2 formed by the combination of the upper clamp base 21, the lower clamp base 22 and the column 23 is a prior art means, and its structure will not be described in detail here; it should be noted that when the two zipper tapes 1 are arranged in the engagement channel 25, the side wall of the zipper teeth 11 close to the upper clamp base 21 abuts against the side wall of the upper clamp base 21 close to the lower clamp base 22, and the side wall of the zipper teeth 11 close to the lower clamp base 22 abuts against the side wall of the lower clamp base 22 close to the upper clamp base 21.

[0047] Referring to Figure 2 , Figure 3 The side wall of the upper clamp base 21 away from the lower clamp base 22 is provided with a connecting base 3, in the embodiment, the connecting base 3 comprises a connecting strip 32, a first mounting strip 33 and a second mounting strip 34, the length direction of the connecting strip 32 is parallel to the surface of the upper clamp base 21, the first mounting strip 33 and the second mounting strip 34 are symmetrically arranged at two ends of the connecting strip 32, one end of the first mounting strip 33 is fixedly connected to one end of the connecting strip 32, and the other end is fixedly connected to the side wall of the upper clamp base 21 away from the lower clamp base 22, and the connecting strip 32 is fixedly mounted on the upper clamp base 21 through the first mounting strip 33.

[0048] Referring to Figure 3 , Figure 4 In the embodiment, one end of the second mounting strip 34 is hingedly connected to the end of the connecting strip 32 away from the first mounting strip 33, for the convenience of description, the end of the second mounting strip 34 away from the connecting strip 32 is defined as the free end of the second mounting strip 34, and the free end of the second mounting strip 34 is connected to the side wall of the upper clamp base 21 away from the lower clamp base 22; the connecting channel 31 is formed by the combination of the connecting strip 32, the first mounting strip 33, the second mounting strip 34 and the side wall of the upper clamp base 21 away from the lower clamp base 22.

[0049] Referring to Figure 2 , Figure 3The pull tab 4 is installed in the connecting channel 31. One side of the pull tab 4 is fixedly installed with two pull strips 42. The two pull strips 42 are arranged at intervals along the width direction of the pull tab 4. A connecting rod 41 is installed between the two pull strips 42. In this embodiment, the two ends of the connecting rod 41 are fixedly installed at the ends of the two pull strips 42 away from the pull tab 4. The connecting rod 41 is used to be arranged in the connecting channel 31. The pull tab 4 is installed in the connecting channel 31 of the connecting seat 3 through the connecting rod 41. The pull tab 4 is used to pull the zipper head 2, so as to drive the zipper head 2 to slide along the length direction of the zipper tape 1. It should be noted that, in this embodiment, the free end of the second installation strip 34 is detachably installed on the side wall of the upper clamping seat 21 away from the lower clamping seat 22. When the second installation strip 34 is flipped towards the side away from the upper clamping seat 21, the connecting channel 31 can be opened, so that the pull tab 4 can be detachably installed in the connecting channel 31.

[0050] Referring to Figure 3 , Figure 4 The side wall of the upper clamping seat 21 away from the lower clamping seat 22 is provided with a first sliding groove 211. The first sliding groove 211 is communicated with the connecting channel 31. The side wall of the lower clamping seat 22 close to the upper clamping seat 21 is provided with a second sliding groove 221. The second sliding groove 221 is communicated with the joint channel 25. The second sliding groove 221 is slidingly installed with a limiting piece 24. In this embodiment, the limiting piece 24 is an elastically arranged rubber piece. The limiting piece 24 is used to abut against the inner side of the zipper teeth 11 (i.e. the side wall of the lower clamping seat 22 close to the zipper teeth 11), so as to limit the position of the zipper head 2.

[0051] Referring to Figure 2 , Figure 3 A limiting assembly 5 is installed between the first sliding groove 211 and the second sliding groove 221. When the pull tab 4 is detached from the connecting channel 31, the limiting assembly 5 makes the limiting piece 24 abut against the inner side of the zipper teeth 11 and deforms. The limiting assembly 5 comprises a first sliding piece 51, a second sliding piece 52 and a limiting piece 53. The first sliding piece 51 is slidingly installed in the first sliding groove 211. The second sliding piece 52 is slidingly installed in the second sliding groove 221. A linkage rod 54 is installed between the first sliding piece 51 and the second sliding piece 52. One end of the linkage rod 54 is fixedly installed on the side wall of the first sliding piece 51 close to the second sliding piece 52. The other end of the linkage rod 54 is arranged in the stand 23 of the zipper head 2 and is fixedly installed on the side wall of the second sliding piece 52 close to the first sliding piece 51. The first sliding piece 51 and the second sliding piece 52 form a whole through the linkage rod 54. The limiting piece 24 is fixedly installed on the side wall of the second sliding piece 52 close to the first sliding piece 51. The limiting piece 24 is slidingly installed in the second sliding groove 221 through the second sliding piece 52.

[0052] Referring to Figure 3 , Figure 4In this embodiment, the limiting member 53 is set as a limiting spring, which is installed in the second sliding groove 221. One end of the limiting spring is fixedly connected to the bottom wall of the second sliding groove 221, and the other end is fixedly connected to the second sliding piece 52. Under normal conditions, the limiting spring causes the second sliding piece 52 to move to the opening of the second sliding groove 221, and the first sliding piece 51 is partially exposed outside the first sliding groove 211. When the second sliding piece 52 moves to the opening of the second sliding groove 221, it can force the limiting piece 24 to move out. The second sliding groove 221 is pressed against the inner side of the zipper tooth 11. It should be noted that in this embodiment, the gap between the connecting strip 32 and the upper clamp 21 and the outer diameter of the connecting rod 41 are adapted to each other, so that when the connecting rod 41 of the pull tab 4 is installed in the connecting channel 31, the connecting rod 41 forces the first sliding piece 51 to move into the first sliding groove 211 and the first sliding piece 51 and the side wall of the upper clamp 21 away from the lower clamp 22 remain flush, while the limiting piece 24 sinks into the second sliding groove 221.

[0053] Reference Figure 4 , Figure 5 The outer peripheral wall of the connecting rod 41 is provided with a first cutting surface 411. The first cutting surface 411 is used to abut against the side wall of the first sliding piece 51 away from the second sliding piece 52. There are two first cutting surfaces 411 and the two first cutting surfaces 411 are arranged in parallel. When the first cutting surface 411 abuts against the first sliding piece 51, the first sliding piece 51 is partially exposed in the first sliding groove 211. At the same time, the limiting piece 24 moves to be flush with the side wall of the lower clamp 22 near the upper clamp 21, so that the limiting piece 24 can fit against the inner side of the zipper tooth 11. It should be noted that the first cutting surface 411 is arranged in parallel on the surface of the pull piece 4. When the first cutting surface 411 abuts against the first sliding piece 51, the pull piece 4 fits against the side wall of the upper clamp 21 away from the lower clamp 22.

[0054] Reference Figure 2 , Figure 3 The upper clamp 21 has a first limiting hole 212 on its side wall away from the lower clamp 22. The first limiting hole 212 is connected to the first sliding groove 211. The free end of the second mounting strip 34 has a second limiting hole 341. When the free end of the second mounting strip 34 rotates to be opposite to the upper clamp 21 (that is, when the length direction of the second mounting strip 34 rotates to be perpendicular to the length direction of the connecting strip 32), the first limiting hole 212 is directly opposite the second limiting hole 341. The first limiting hole 212 is equipped with a first opening and closing member 6 for engaging with the second limiting hole 341. The free end of the second mounting strip 34 can be detachably installed on the upper clamp 21 through the first opening and closing member 6 for opening and closing the connecting channel 31.

[0055] Reference Figure 3 , Figure 4The side wall of the first sliding sheet 51 close to the first limiting hole 212 is fixedly provided with a butt joint sheet 513, the butt joint sheet 513 is slidingly arranged in the first limiting hole 212, the first opening and closing piece 6 comprises a limiting rod 61 and a pushing ring 62, one end of the limiting rod 61 is fixedly arranged on the side wall of the butt joint sheet 513, and the limiting rod 61 is connected with the first sliding sheet 51 through the butt joint sheet 513; when the first sliding sheet 51 is flush with the side wall of the upper clamping seat 21 away from the lower clamping seat 22 or the first sliding sheet 51 is partially exposed to the first sliding groove 211, the limiting rod 61 is inserted into the second limiting hole 341; the pushing ring 62 is fixedly arranged on the outer circumferential wall of the connecting rod 41, and the pushing ring 62 is used to push the first sliding sheet 51 to sink in the first sliding groove 211 so that the limiting rod 61 is separated from the second limiting hole 341.

[0056] With reference to Figure 2 , Figure 5 , Figure 6 In the embodiment, the side wall of the upper clamping seat 21 away from the lower clamping seat 22 is provided with a first avoiding groove 213, the first avoiding groove 213 is located on one side of the first sliding groove 211, the two ends of the first avoiding groove 213 extend along the length direction of the connecting strip 32, and the pushing ring 62 is normally partially embedded in the first avoiding groove 213 and can slide along the length direction of the first avoiding groove 213; the outer circumferential wall of the pushing ring 62 is provided with a second cutting surface 621, the second cutting surface 621 is provided with two, and the two second cutting surfaces 621 are correspondingly arranged with the two first cutting surfaces 411, and each second cutting surface 621 is flush with the corresponding first cutting surface 411.

[0057] In this way, the pushing ring 62 is normally embedded in the first avoiding groove 213 and cannot contact the first sliding sheet 51, when the pull tab 4 needs to be disassembled, the pull tab 4 is rotated to be attached to the upper clamping seat 21, so that the first cutting surface 411 abuts against the surface of the first sliding sheet 51, at this time, the second cutting surface 621 is also flush with the surface of the first sliding sheet 51, then the pull tab 4 is pulled and slides along the axial direction of the connecting rod 41, so that the pushing ring 62 can move to the surface of the first sliding sheet 51, the pull tab 4 is rotated again, the pushing ring 62 can push the first sliding sheet 51 towards the side close to the second sliding sheet 52, so that the first sliding sheet 51 sinks in the first sliding groove 211, and the first sliding sheet 51 drives the limiting rod 61 to separate from the second limiting hole 341, so that the second mounting strip 34 can be opened, so that the pull tab 4 can be taken out of the connecting channel 31.

[0058] With reference to Figure 5 , Figure 6The side wall of the first sliding sheet 51 away from the second sliding sheet 52 is provided with a second avoiding groove 511, the bottom wall of the second avoiding groove 511 is used for abutting against the pushing ring 62 (that is, when the pushing ring 62 pushes the first sliding sheet 51 to sink in the first sliding groove 211, the pushing ring 62 abuts against the bottom wall of the second avoiding groove 511), one end of the second avoiding groove 511 penetrates the side wall of the first sliding sheet 51 close to the first limiting hole 212, the side wall of the upper clamping seat 21 away from the lower clamping seat 22 is provided with a third avoiding groove 214, one end of the third avoiding groove 214 communicates with the second avoiding groove 511, and the other end penetrates the side wall of the upper clamping seat 21 away from the first mounting strip 33, so as to sequentially slide out the pushing ring 62 from the side wall of the upper clamping seat 21 away from the lower clamping seat 22 through the second avoiding groove 511 and the third avoiding groove 214.

[0059] With reference to Figure 5 , Figure 6 , Figure 7 The side of the second avoiding groove 511 close to the third avoiding groove 214 is provided with a guide surface 512, the guide surface 512 is used for moving the first sliding sheet 51 to the side close to the lower clamping seat 22; it should be noted that after the pull tab 4 is taken out of the connecting channel 31, the first sliding sheet 51 is partially exposed to the first sliding groove 211 under the action of the limiting spring, so that when the connecting rod 41 is separated from the connecting channel 31, the bottom wall of the second avoiding groove 511 is higher than the bottom wall of the third avoiding groove 214, the guide surface 512 is used for transition effect, so that when the pull tab 4 is reinstalled in the connecting channel 31, the pushing ring 62 of the connecting rod 41 pushes through the third avoiding groove 214 to the side of the second avoiding groove 511, when the pushing ring 62 abuts against the guide surface 512, the pushing ring 62 can force the first sliding sheet 51 to move to the side close to the lower clamping seat 22 through the guide surface 512, so that the bottom wall of the second avoiding groove 511 is parallel to the bottom wall of the third avoiding groove 214, so that the pushing ring 62 can enter the second avoiding groove 511, and then the connecting rod 41 is installed in the connecting channel 31.

[0060] The implementation principle of the embodiment 1 of the application is as follows: a first state, when the slider 2 is pulled to engage or open the slide fastener 1 by pulling the puller 4, the outer peripheral wall of the connecting rod 41 of the puller 4 abuts against the surface of the first sliding piece 51, the outer peripheral wall of the connecting rod 41 can push the first sliding piece 51 and make the limiting piece 24 sink in the second sliding groove 221, thereby reducing the contact area between the lower clamping seat 22 and the slide fastener 11, and further making the slider 2 slide more smoothly; a second state, when the slider 2 is in a static state after the slide fastener 1 is engaged or opened, the puller 4 is rotated to be attached to the surface of the upper clamping seat 21, at this time, the first cutting surface 411 of the connecting rod 41 of the puller 4 is used to abut against the surface of the first sliding piece 51, the first cutting surface 411 can make the surface of the limiting piece 24 keep flush with the surface of the lower clamping seat 22 close to the surface of the upper clamping seat 21, at this time, the limiting piece 24 is attached to the inner side of the slide fastener 11, the contact area between the lower clamping seat 22 and the slide fastener 11 is increased, the friction between the limiting piece 24 and the slide fastener 11 can make the slider 2 keep as static as possible, and the possibility of the slider 2 sliding randomly is reduced, thereby forming a self-locking effect.

[0061] A third state, when the puller 4 is taken out of the connecting channel 31, the first sliding piece 51 loses the limiting effect of the connecting rod 41, the limiting piece 24 moves out of the second sliding groove 221 under the action of the limiting spring, thereby making the limiting piece 24 attached to the inner side of the slide fastener 11 and deformed under the extrusion of the limiting spring, further increasing the friction between the limiting piece 24 and the slide fastener 11, the slider 2 loses the puller 4 and the friction is further increased, thereby making the slider 2 more difficult to slide, improving the anti-theft effect of the overall structure, and reducing the possibility that a thief secretly opens the slide fastener through the slider 2.

[0062] When the puller 4 is taken out, the first step is to rotate the puller 4, so that the first cutting surface 411 is attached to the first sliding piece 51; the second step is to pull the puller 4, so that the pushing ring 62 moves out of the first avoiding groove 213 and moves to above the second avoiding groove 511; the third step is to rotate the puller 4, so that the pushing ring 62 can push the first sliding piece 51 to sink in the first sliding groove 211, thereby forcing the limiting rod 61 to be separated from the second limiting hole 341, however, pulling the puller 4 forces the pushing ring 62 to slide out through the second avoiding groove 511 and the third avoiding groove 214 in turn, thereby disassembling the puller 4 from the connecting channel 31; the puller 4 is taken out in three steps, thereby reducing the possibility of the puller 4 falling off from the connecting channel 31 due to misoperation and improving the connection stability between the slider 2 and the puller 4.

[0063] Embodiment 2:

[0064] The embodiment of the application discloses an anti-theft slide fastener.

[0065] Reference Figure 8 The difference between the anti-theft zipper disclosed in this application and embodiment 1 is that:

[0066] In this embodiment, one end of the second mounting strip 34 is fixedly connected to the end face of the connecting strip 32 away from the first mounting strip 33, and the other end is fixedly connected to the side wall of the upper clamp 21 away from the lower clamp 22; the two ends of the connecting strip 32 are respectively connected to the upper clamp 21 through the first mounting strip 33 and the second mounting strip 34; it should be noted that since the second mounting strip 34 is fixedly connected to the upper clamp 21, this embodiment does not need to provide the limiting rod 61, the first limiting hole 212, the second limiting hole 341, the mating piece 513, the second clearance groove 511 and the third clearance groove 214.

[0067] Reference Figure 8 , Figure 9 One end of the connecting rod 41 is hinged to the end of the pull bar 42 away from the pull piece 4. For ease of description, the other end of the connecting rod 41 is defined as the free end of the connecting rod 41. The free end of the connecting rod 41 is fixedly installed with a connecting rod 412. A second opening and closing member is installed between the connecting rod 412 and another pull bar 42 of the pull piece 4. The free end of the connecting rod 41 is detachably installed on the pull piece 4 through the second opening and closing member, so that the pull piece 4 can be detachably installed on the connecting channel 31.

[0068] Reference Figure 8 , Figure 9 In this embodiment, the second opening and closing member is a clamping block 7. The clamping block 7 is fixedly installed on the end of the pull bar 42 away from the pull piece 4. The side wall of the clamping block 7 away from the pull bar 42 is provided with a clamping groove 71. The clamping block 7 is elastically set. The groove spacing of the clamping groove 71 is smaller than the outer diameter of the connecting rod 412. The side wall of the clamping block 7 located at the groove opening of the clamping groove 71 is provided with a guide surface 72. The guide surface 72 is used for the connecting rod 412 to abut against, so as to force the clamping block 7 to deform and expand the groove opening of the clamping groove 71.

[0069] Reference Figure 9 , Figure 10 The side wall of the pull bar 42 is provided with a moving groove 421. Both ends of the moving groove 421 extend along the length of the pull bar 42. The moving groove 421 is a through groove that passes through the two opposite side walls of the pull bar 42. An abutment strip 8 is slidably installed in the moving groove 421. One end of the abutment strip 8 extends out of the moving groove 421 and is used to abut against the side wall of the push ring 62. The other end of the abutment strip 8 is fixedly installed with a moving strip 9. The side wall of the moving strip 9 away from the abutment strip 8 has multiple anti-slip ridges 91. Pushing the moving strip 9 can move the abutment strip 8 to abut against the push ring 62 or make the abutment strip 8 disengage from the push ring 62.

[0070] Reference Figure 10The side wall of the abutting bar 8 is provided with an embedded groove, a first magnet 81 is fixedly installed in the embedded groove, and a second magnet 422 is fixedly installed on the side wall of the moving groove 421 close to the embedded groove. When the abutting bar 8 abuts against the pushing ring 62, the first magnet 81 and the second magnet 422 are magnetically attracted to each other.

[0071] The implementation principle of the embodiment 2 of the present application is as follows: when the pull tab 4 is installed on the connecting channel 31, the first sliding piece 51 is pressed downward to move into the first sliding groove 211, then the connecting rod 41 is arranged in the connecting channel 31, the connecting rod 41 is folded to force the abutting rod 412 of the connecting rod 41 to be clamped into the clamping groove 71 of the clamping block 7, so that the pull tab 4 is installed on the connecting channel 31; then the side wall of the moving bar 9 provided with the anti-skid convex patterns 91 is pressed and pushed by the hand, so that the moving bar 9 moves towards the second magnet 422, when the second magnet 422 and the first magnet 81 are magnetically attracted, the end surface of the abutting bar 8 abuts against the pushing ring 62, so that the connecting rod 41 is limited, the possibility that the connecting rod 41 is separated from the clamping block 7 is reduced, and the connection stability between the pull tab 4 and the connecting channel 31 is further improved.

[0072] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, so that: any equivalent change made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. An anti-theft zipper comprising a zipper tape (1) and a zipper head (2), the zipper tape (1) being provided with zipper teeth (11), characterized in that: The zipper head (2) comprises an upper clamp base (21), a lower clamp base (22), and a column (23) having two ends connected to the upper clamp base (21) and the lower clamp base (22) respectively; a connecting seat (3) is arranged on the side wall of the upper clamp base (21) away from the lower clamp base (22), the connecting seat (3) has a connecting channel (31), and a pull tab (4) is detachably installed in the connecting channel (31); a limiting piece (24) is slidably installed on the side wall of the lower clamp base (22) close to the upper clamp base (21), the limiting piece (24) is elastically arranged to abut against the inner side of the zipper tooth (11); a limiting assembly (5) is arranged between the limiting piece (24) and the connecting channel (31), when the pull tab (4) is separated from the connecting channel (31), the limiting assembly (5) forces the limiting piece (24) to abut against the inner side of the zipper tooth (11) and be deformed; A first sliding groove (211) is formed in the side wall of the upper clamp base (21) away from the lower clamp base (22) and communicates with the connecting channel (31), and a second sliding groove (221) is formed in the side wall of the lower clamp base (22) close to the upper clamp base (21); the limiting assembly (5) comprises a first sliding piece (51) slidably installed in the first sliding groove (211), a second sliding piece (52) slidably installed in the second sliding groove (221), and a limiting piece (53), a linkage rod (54) is arranged between the first sliding piece (51) and the second sliding piece (52), and the limiting piece (24) is fixed to the side wall of the second sliding piece (52) close to the upper clamp base (21); the limiting piece (53) is arranged on the second sliding piece (52), the limiting piece (53) normally moves the limiting piece (24) out of the second sliding groove (221) and abuts against the inner side of the zipper tooth (11), and the first sliding piece (51) is partially exposed to the first sliding groove (211); when the pull tab (4) is installed in the connecting channel (31), the pull tab (4) forces the first sliding piece (51) to move into the first sliding groove (211), and the limiting piece (24) sinks into the second sliding groove (221).

2. An anti-theft slide fastener according to claim 1, characterized in that: The pull tab (4) is provided with a connecting rod (41) for being arranged in the connecting channel (31), the connecting rod (41) normally forces the first sliding piece (51) to be embedded in the first sliding groove (211) and the first sliding piece (51) to be flush with the side wall of the upper clamp base (21) away from the lower clamp base (22); a first cutting surface (411) for abutting against the first sliding piece (51) is arranged on the outer peripheral wall of the connecting rod (41), when the first cutting surface (411) abuts against the first sliding piece (51), the limiting piece (24) and the side wall of the lower clamp base (22) close to the upper clamp base (21) are flush and fit the inner side of the zipper tooth (11).

3. An anti-theft slide fastener according to claim 2, characterized in that: The first cutting surface (411) is arranged parallel to the surface of the pull tab (4), when the first cutting surface (411) abuts against the first sliding piece (51), the pull tab (4) fits the side wall of the upper clamp base (21) away from the lower clamp base (22).

4. An anti-theft slide fastener according to claim 2, characterized in that: The connecting seat (3) comprises a connecting strip (32), a first mounting strip (33) and a second mounting strip (34), one end of the first mounting strip (33) is fixed to one end of the connecting strip (32), the other end is fixed to the side wall of the upper clamping seat (21) away from the lower clamping seat (22), one end of the second mounting strip (34) is hinged to one end of the connecting strip (32) away from the first mounting strip (33), and the free end of the second mounting strip (34) is used for being connected with the upper clamping seat (21), and the connecting strip (32), the first mounting strip (33) and the second mounting strip (34) combine to form the connecting channel (31); a first opening and closing piece (6) is arranged between the free end of the second mounting strip (34) and the upper clamping seat (21), and the free end of the second mounting strip (34) is detachably mounted on the upper clamping seat (21) through the first opening and closing piece (6), so as to open and close the connecting channel (31).

5. An anti-theft zipper according to claim 4, characterized in that: The side wall of the upper clamping seat (21) away from the lower clamping seat (22) is provided with a first limiting hole (212) communicated with the first sliding groove (211), the free end of the second mounting strip (34) is provided with a second limiting hole (341), and when the free end of the second mounting strip (34) is rotated to be opposite to the upper clamping seat (21), the first limiting hole (212) and the second limiting hole (341) are arranged opposite to each other; the first opening and closing piece (6) comprises a limiting rod (61) and a pushing ring (62), the limiting rod (61) is slidably installed in the first limiting hole (212) and connected with the first sliding piece (51), when the first sliding piece (51) is flush with the side wall of the upper clamping seat (21) away from the lower clamping seat (22) or the first sliding piece (51) is partially exposed in the first sliding groove (211), the limiting rod (61) is inserted in the second limiting hole (341); the pushing ring (62) is arranged on the outer peripheral wall of the connecting rod (41), and the pushing ring (62) is used for pushing the first sliding piece (51) to sink in the first sliding groove (211) so that the limiting rod (61) is separated from the second limiting hole (341).

6. An anti-theft slide fastener according to claim 5, characterized in that: The side wall of the upper clamping seat (21) away from the lower clamping seat (22) is provided with a first avoiding groove (213) located on one side of the first sliding groove (211), the pushing ring (62) is normally partially embedded in the first avoiding groove (213), and the outer peripheral wall of the pushing ring (62) is provided with a second cutting surface (621), and the second cutting surface (621) is flush with the first cutting surface (411).

7. An anti-theft zipper according to claim 5, wherein: The side wall of the first sliding piece (51) away from the lower clamping seat (22) is provided with a second avoiding groove (511), when the pushing ring (62) pushes the first sliding piece (51) to sink in the first sliding groove (211), the pushing ring (62) abuts against the bottom wall of the second avoiding groove (511); the side wall of the upper clamping seat (21) away from the lower clamping seat (22) is provided with a third avoiding groove (214) communicated with the second avoiding groove (511) for moving the pushing ring (62) out of the side wall of the upper clamping seat (21) away from the lower clamping seat (22).

8. An anti-theft zipper according to claim 7, characterized in that: The second avoiding groove (511) is provided with a guide surface (512) near one side of the third avoiding groove (214), and the guide surface (512) is used for moving the first sliding sheet (51) towards the side near the lower clamping seat (22).

9. An anti-theft zipper according to claim 2, characterized in that: One end of the connecting rod (41) is hinged to one side of the pull tab (4), and a second opening and closing member is arranged between the free end of the connecting rod (41) and the pull tab (4), and the free end of the connecting rod (41) is detachably installed on the pull tab (4) through the second opening and closing member.

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