Zipper structure and chain with the same

Abstract

The utility model discloses a tooth structure and zip fastener beneficial to chain belt twist explosion prevention belongs to zip fastener technical field, including first chain belt and second chain belt. Each chain belt includes cloth core and a plurality of chain tooth body on cloth core, and chain tooth body is equipped with main tooth and top tooth. The head of main tooth protrudes to both sides, forms side tooth part. Still include auxiliary tooth, and the auxiliary tooth has the card tooth groove between side tooth part, and the card tooth groove is connected with the cooperation of the side tooth part of opposite chain belt. The tooth head upper end surface of main tooth constitutes tooth head platform, and tooth head platform exceeds the upper edge of cloth core. Auxiliary tooth extends along the height direction, and its upper end platform exceeds tooth head platform. The inside platform of top tooth and the tooth head platform of main tooth form the clearance along the height direction between them. The utility model discloses the clearance formed between top tooth and main tooth provides the deformation avoidance space for chain belt twist or bending, avoids the rigid interference of top tooth, prevents the occlusion invalidity explosion tooth.

Description

Technical Field

[0001] This utility model belongs to the field of zipper technology, specifically relating to a tooth structure and zipper that facilitates chain twisting and explosion prevention. Background Technology

[0002] To prevent foreign objects from getting stuck in the zipper teeth, current technology generally uses a top tooth structure to enhance the seal. For example... Figure 1 As shown, this structure features a top tooth on the outer surface along the chain tooth height direction. This top tooth acts as a physical barrier, preventing foreign objects such as hair and fabric fibers from entering the chain tooth engagement area. Simultaneously, the outer surface of the top tooth provides diverse design options. Due to its high durability and excellent anti-jamming performance, this type of structure is widely used in high-end apparel, bags, and outdoor equipment. However, with increasingly complex application scenarios, users have placed higher demands on the stability and smoothness of chain tooth structures. Especially under repeated torsion, bending, or dynamic loads, the limited movement space of the top tooth structure may lead to chain tooth engagement failure.

[0003] To address the aforementioned issues, the applicant's prior patent (publication number: CN222149216U) discloses an explosion-proof tooth chain structure and zipper. This solution enhances the explosion-proof tooth performance through an innovative irregularly shaped limiting groove design. The chain tooth body includes a tooth head, a tooth neck, and a tooth body. The tooth head has a first engaging part and a second engaging part, and the tooth neck has a first engaging groove and a second engaging groove. On the same chain, the second engaging groove, side teeth, and first engaging groove of adjacent chain tooth bodies combine to form an irregularly shaped limiting groove, which engages with the tooth head of the opposite chain, enhancing the lateral anti-separation force of the chain tooth through a locking mechanism. Although this structure significantly reduces the probability of tooth bursting under normal stress, there are still two major defects in practical applications: (1) Insufficient tooth head platform height leads to twisting and loosening: such as Figure 1 As shown, the upper edge of the fabric core exceeds the height of the tooth head platform h0, resulting in insufficient effective bite height of the chain teeth. When the chain is twisted by external force, the deformation of the fabric core is directly transmitted to the tooth head, causing the meshing part to loosen and triggering tooth breakage; (2) Limited space for top teeth exacerbates the risk of tooth breakage: Under the condition of zipper torsion or bending, the top teeth on the two chain belts restrict the free displacement of the chain teeth due to rigid interference, causing the interlocking chain teeth to bear additional shear stress, which may affect the smoothness of opening and closing, or even cause permanent deformation or bite failure of the chain teeth. Summary of the Invention

[0004] In response to the problems in related technologies, this utility model proposes a tooth structure and zipper that facilitates chain twisting and explosion prevention, so as to solve the technical problem that the top tooth structure fails to engage due to limited space when the zipper is twisted.

[0005] The technical solution of this utility model is implemented as follows: a tooth structure that facilitates chain twisting and explosion prevention includes a first chain and a second chain; each chain includes a cloth core and a plurality of chain tooth bodies arranged at intervals along the extension direction of the cloth core; the chain tooth body includes main teeth and top teeth arranged sequentially from bottom to top; the main teeth of opposite chain belts alternately mesh with each other; the tooth heads of the main teeth protrude to both sides to form side teeth; at least one side of the chain tooth body is also provided with an auxiliary tooth, and the auxiliary tooth and the side tooth on the same side have a tooth groove, and the tooth groove is engaged with the side tooth of the main tooth of the opposite chain belt;

[0006] The head of the main tooth extends toward the opposite chain to form the tooth head, and the upper surface of the tooth head forms a tooth head platform; the height of the tooth head platform exceeds the upper edge of the fabric core;

[0007] The accessory tooth extends along the height direction of the chain tooth body, and the height of the upper platform of the accessory tooth exceeds the tooth head platform of the main tooth; the inner platform of the top tooth and the tooth head platform of the main tooth form an movable gap along the height direction for chain twisting.

[0008] This invention significantly increases the effective engagement area of ​​the teeth by raising the height of the tooth head platform to exceed the upper edge of the fabric core and by raising the height of the accessory teeth to exceed the tooth head platform. When the chain is twisted by external force, the torsional stress of the fabric core cannot completely affect the bite strength of the entire engagement area, thereby eliminating tooth loosening caused by fabric core deformation. In addition, the movable gap formed between the inner platform of the top tooth and the tooth head platform of the main tooth provides deformation avoidance space for chain twisting or bending, avoiding situations such as rigid interference of the top tooth restricting the movement space of the chain teeth, and preventing bite failure and tooth breakage.

[0009] As a further improvement to the above solution, the inner platform of the vertex tooth and the upper platform of the accessory tooth are at the same height; the movable gap is formed by the stepped concavity at the upper part of the tooth head, and the height of the movable gap is configured as the height difference between the upper platform of the accessory tooth and the tooth head platform of the main tooth. By explicitly configuring the height of the movable gap as the height difference between the upper platform of the accessory tooth and the tooth head platform of the main tooth, the movable space of the vertex tooth is quantified. When the chain is twisted, this gap provides a displacement margin matching the step height for the vertex tooth to sink, which avoids rigid interference of the vertex tooth and prevents the gap from being too large and weakening the structural strength of the square tooth, effectively reducing the risk of tooth breakage.

[0010] As a further improvement to the above solution, the front end of the top tooth extends forward to form an overhanging shielding portion, which covers the shoulder socket of the main tooth, forming a shielding space for accommodating the head of the opposing chain tooth. The overhanging shielding portion covers the shoulder socket of the main tooth and forms a space to accommodate the head of the opposing chain tooth, creating an embedded accommodating structure while maintaining the anti-foreign-object intrusion function of the square tooth, making the zipper tooth bite stable and the structure compact.

[0011] As a further improvement to the above scheme, the top tooth and the main tooth on the same chain tooth body are eccentrically positioned. This eccentric positioning of the top tooth and the main tooth on the same chain tooth body causes the center of gravity of the top tooth to deviate from the meshing axis of the main tooth. When the chain is subjected to non-uniform load torsion, the eccentric structure induces the top tooth to generate an anti-torsional torque, compensating for the interference of the fabric core deformation on the meshing part and ensuring the bite strength of the chain teeth.

[0012] As a further improvement to the above solution, the top tooth is a square tooth or a square tooth-like structure. A square tooth is a square-shaped protrusion with a flat top and four vertical sides; a square tooth-like structure is a modified design that maintains the same dust-blocking function, such as a square-like structure with rounded corners or a slightly slanted top.

[0013] As a further improvement to the above scheme, the top teeth of the opposite side chain tapes face each other and do not contact each other; the top teeth of the opposite side chain tapes are aligned or symmetrically arranged. The aligned or symmetrical layout of the top teeth of the opposite chain tapes ensures that when the zipper twists in the height direction, the gaps on both sides are evenly stressed, avoiding chain tooth misalignment caused by unilateral stress overload.

[0014] As a further improvement to the above solution, when the main teeth of the opposite side zipper belts engage alternately, a clearance distance is maintained between the auxiliary teeth and the adjacent top teeth on the same side zipper belt. This clearance distance between the auxiliary teeth and the adjacent top teeth forms a deformation buffer zone. When the zipper bends along its length, this distance allows the auxiliary teeth and top teeth to undergo relative displacement without collision interference, thus avoiding mechanical damage.

[0015] As a further improvement to the above solution, the lower end of the accessory tooth extends to be flush with or close to but not exceeding the lower edge of the fabric core. Extending the lower end of the accessory tooth close to or flush with the lower edge of the fabric core increases the engagement area between the tooth socket and the lateral teeth, ensuring the stability of the chain tooth occlusion.

[0016] As a further improvement to the above solution, the chain tooth body includes a joint portion connected to the fabric core, and the main tooth and the top tooth are both disposed on the joint portion; the joint portion includes a core hole through which the fabric core passes; the extension height of the auxiliary tooth is greater than the dimension of the core hole in the height direction.

[0017] A zipper includes a tooth structure as described above that facilitates twisting and prevents breakage. The zipper maintains smooth opening and closing even under twisting conditions, making it particularly suitable for flexible bags, sports protective gear, and other products subjected to repeated bending.

[0018] The beneficial effects of this utility model are:

[0019] (1) By raising the height of the tooth head platform of the master tooth to exceed the upper edge of the cloth core, and setting the height of the upper platform of the accessory tooth to exceed the tooth head platform, the effective meshing area of ​​the tooth head is significantly increased. When the chain is twisted by external force, the torsional stress of the cloth core cannot completely affect the biting strength of the entire meshing area, thereby eliminating the tooth head loosening caused by the deformation of the cloth core and effectively avoiding the defect of tooth breakage.

[0020] (2) The movable gap formed between the inner platform of the top tooth and the head platform of the main tooth provides deformation avoidance space for the chain to twist or bend. When the zipper bends along the height direction, the top tooth can sink and move along the movable gap, avoiding the rigid interference of the top tooth that restricts the movable space of the chain teeth, significantly reducing the shear stress caused by excessive bending of the chain teeth, and preventing tooth breakage due to occlusal failure. Attached Figure Description

[0021] Figure 1 A front view of the meshing of chain teeth in the prior art;

[0022] Figure 2 This is a front view of the tooth structure of this utility model;

[0023] Figure 3 This is a three-dimensional view of the tooth structure of this utility model;

[0024] Figure 4 This is a top view of the tooth structure of this utility model;

[0025] Figure 5 This is a perspective view of the chain tooth body of this utility model;

[0026] Figure 6 This is a perspective view of the chain tooth body of this utility model from another angle;

[0027] Figure 7 This is a cross-sectional schematic diagram of the tooth structure of this utility model;

[0028] Figure 8 This is a schematic diagram illustrating the working principle of the tooth structure of this utility model.

[0029] Figure label:

[0030] L1, first chain belt; L2, second chain belt; B1, fabric core;

[0031] 1. Chain element body;

[0032] 11. Main tooth; 111. Tooth tip; 112. Lateral portion; P1. Tooth tip plateau;

[0033] 12. Top tooth; 121. Overhanging shield; 122. Shielding space;

[0034] 13. Accessory teeth;

[0035] 14. Joint; 141. Core hole;

[0036] K1, tooth socket; J1, clearance; J2, clearance. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Example:

[0039] like Figures 2-8 As shown, a tooth structure that facilitates chain twisting and explosion prevention includes a first chain belt L1 and a second chain belt L2; each chain belt includes a cloth core B1 and a plurality of chain tooth bodies 1 arranged at intervals along the extending direction of the cloth core B1.

[0040] The chain tooth body 1 includes a main tooth 11 and a top tooth 12 arranged sequentially from bottom to top; in this embodiment, the chain tooth body 1 includes a joint portion 14 connected to the fabric core B1, and the main tooth 11 and the top tooth 12 are both provided on the joint portion 14; the joint portion 14 includes a core hole 141 through which the fabric core B1 passes.

[0041] The main teeth 11 of the opposite side chain belts mesh alternately; the top teeth 12 of the opposite side chain belts face each other but do not contact each other; the tips 111 of the main teeth 11 protrude to both sides to form side teeth 112; at least one side of the chain tooth body 1 is also provided with a secondary tooth 13, and the secondary tooth 13 and the side tooth 112 on the same side have a tooth groove K1, which is engaged and connected with the side tooth 112 of the opposing chain belt main teeth 11.

[0042] In this embodiment, the extension height of the accessory tooth 13 is greater than the dimension of the core hole 141 in the height direction. The lower end of the accessory tooth 13 extends to be flush with or close to but not exceeding the lower edge of the fabric core B1. The extension of the lower end of the accessory tooth 13 close to or flush with the lower edge of the fabric core B1 increases the meshing area between the tooth socket K1 and the side tooth portion 112, ensuring the stability of the chain tooth occlusion.

[0043] The head of the main tooth 11 extends toward the opposite chain to form the tooth head 111, and the upper surface of the tooth head 111 forms a tooth head platform P1; the height of the tooth head platform P1 exceeds the upper edge of the fabric core B1, that is, the distance between the tooth head platform P1 and the upper edge of the fabric core B1 is h1, and the height range of h1 can be 0.10mm to 0.20mm.

[0044] The accessory tooth 13 extends along the height direction of the chain tooth body 1, and the height of the upper platform of the accessory tooth 13 exceeds the tooth head platform P1 of the main tooth 11; the inner platform of the top tooth 12 and the tooth head platform P1 of the main tooth 11 form an movable gap J1 for chain twisting along the height direction, and the height range of the movable gap J1 is h2, preferably 0.20mm to 0.30mm.

[0045] When the zipper bends along the height direction, the top tooth 12 can sink and shift along the movable gap J1, avoiding the rigid interference of the top tooth 12 that restricts the movable space of the zipper teeth, and preventing bite failure and tooth breakage.

[0046] In this embodiment, the inner platform of the top tooth 12 and the upper platform of the accessory tooth 13 are at the same height; the movable gap J1 is formed by the stepped inward concavity of the upper part of the tooth head 111, and the height of the movable gap J1 is configured as the height difference between the upper platform of the accessory tooth 13 and the tooth head platform P1 of the main tooth 11. By explicitly configuring the height of the movable gap J1 as the height difference between the upper platform of the accessory tooth 13 and the tooth head platform P1 of the main tooth 11, the movable space of the top tooth 12 is quantified. When the chain is twisted, this gap provides a displacement margin matching the step height for the sinking of the top tooth 12, which avoids rigid interference of the top tooth 12 and prevents the gap from being too large and weakening the structural strength of the square tooth, effectively reducing the risk of tooth breakage.

[0047] In this embodiment, the front end of the top tooth 12 extends forward to form an overhanging shielding portion 121. The overhanging shielding portion 121 covers the shoulder socket of the main tooth 11, forming a shielding space 122 for accommodating the head of the opposing chain tooth 111. The overhanging shielding portion 121 covers the shoulder socket of the main tooth 11 and forms a space to accommodate the head of the opposing chain tooth main tooth 11. While maintaining the anti-foreign object intrusion function of the square tooth, it creates an embedded accommodating structure, making the zipper teeth bite stably and the structure compact.

[0048] In this embodiment, the top tooth 12 and the main tooth 11 on the same chain tooth body 1 are eccentrically positioned. This eccentric positioning of the top tooth 12 and the main tooth 11 on the same chain tooth body 1 causes the center of gravity of the top tooth 12 to deviate from the meshing axis of the main tooth 11. When the chain is subjected to non-uniform load torsion, the eccentric structure induces the top tooth 12 to generate an anti-torsional torque, compensating for the interference of the fabric core B1 deformation on the meshing part and ensuring the interlocking strength of the chain teeth.

[0049] In this embodiment, the top tooth 12 is a square tooth or a square tooth-like structure. A square tooth is a square-shaped protrusion with a flat top and four vertical sides; a square tooth-like structure is a modified design that maintains the same dust-blocking function, such as a similar square with rounded corners or a slightly slanted top.

[0050] In this embodiment, the top teeth 12 of the opposite side chain tapes are aligned or symmetrically arranged. The aligned or symmetrical layout of the top teeth 12 of the opposite chain tapes ensures that when the zipper twists in the height direction, the gaps on both sides are evenly stressed, avoiding misalignment of the chain teeth caused by unilateral stress overload.

[0051] In this embodiment, when the main teeth 11 of the opposite side chain belts engage alternately, a clearance distance J2 is maintained between the auxiliary teeth 13 and the adjacent top teeth 12 on the same side chain belt. This clearance distance J2 between the auxiliary teeth 13 and the adjacent top teeth 12 forms a deformation buffer zone. When the zipper bends along its length, this distance allows the auxiliary teeth 13 and the top teeth 12 to undergo relative displacement without collision interference, thus avoiding mechanical damage.

[0052] This embodiment also provides a zipper, including the tooth structure described above that facilitates chain twisting and explosion prevention. This zipper maintains smooth opening and closing even under twisting conditions, making it particularly suitable for flexible bags, sports protective gear, and other products subject to repeated bending.

[0053] Through the above technical solution, in specific applications: a tooth structure that facilitates chain twisting and explosion prevention raises the height of the tooth head platform P1 of the main tooth 11 to exceed the upper edge of the fabric core B1, and sets the height of the upper platform of the auxiliary tooth 13 to exceed the tooth head platform P1, significantly increasing the effective meshing area of ​​the tooth head 111. When the chain is twisted by external force, the torsional stress of the fabric core B1 cannot completely affect the biting strength of the entire meshing area, thereby eliminating the loosening of the tooth head 111 caused by the deformation of the fabric core B1 and effectively avoiding the defect of tooth breakage. In addition, the movable gap J1 formed between the inner platform of the top tooth 12 and the tooth head platform P1 of the main tooth 11 provides deformation avoidance space for chain twisting or bending. When the zipper bends along the height direction, the top tooth 12 can sink and displace along the movable gap J1, avoiding the situation where the rigid interference of the top tooth 12 restricts the movable space of the chain teeth, significantly reducing the shear stress caused by excessive bending of the chain teeth, and preventing tooth breakage due to bite failure.

[0054] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A tooth structure for facilitating chain twisting and explosion prevention, comprising a first chain belt and a second chain belt; each chain belt includes a fabric core and a plurality of chain tooth bodies spaced apart along the extension direction of the fabric core; each chain tooth body includes main teeth and top teeth arranged sequentially from bottom to top; the main teeth of opposite chain belts alternately mesh with each other; the tips of the main teeth protrude to both sides to form side teeth; at least one side of each chain tooth body is also provided with an auxiliary tooth, the auxiliary tooth and the side tooth on the same side having a locking groove, the locking groove engaging with the side tooth of the main tooth of the opposite chain belt; characterized in that: The head of the main tooth extends toward the opposite chain to form the tooth head, and the upper surface of the tooth head forms a tooth head platform; the height of the tooth head platform exceeds the upper edge of the fabric core; The accessory tooth extends along the height direction of the chain tooth body, and the height of the upper platform of the accessory tooth exceeds the tooth head platform of the main tooth; the inner platform of the top tooth and the tooth head platform of the main tooth form an movable gap along the height direction for chain twisting.

2. The tooth structure of claim 1, wherein, The inner platform of the primary tooth and the upper platform of the accessory tooth are at the same height; the movable gap is formed by the stepped inward concavity of the upper part of the tooth head, and the height of the movable gap is configured as the height difference between the upper platform of the accessory tooth and the tooth head platform of the primary tooth.

3. The tooth structure for preventing chain twisting and explosion as described in claim 1, characterized in that, The front end of the top tooth extends forward to form an overhanging shield, which covers the shoulder socket of the main tooth and forms a shielding space for accommodating the opposing chain tooth head.

4. The tooth structure for preventing chain twisting and explosion as described in claim 3, characterized in that, The top teeth and main teeth on the same chain tooth body are set off eccentrically to each other.

5. The tooth structure for preventing chain twisting and explosion as described in claim 1, characterized in that, The top tooth is a square tooth or a square tooth-like structure.

6. The tooth structure for chain belt twisting and explosion prevention according to claim 1, characterized in that, The top teeth of opposite side chains face each other and are close together but do not touch each other; the top teeth of opposite side chains are aligned or symmetrically arranged.

7. The tooth structure for preventing chain twisting and explosion as described in claim 1, characterized in that, When the main teeth of the opposite side chain belts mesh alternately, there is a clearance distance between the auxiliary teeth on the same side chain belt and the adjacent top teeth.

8. The tooth structure for preventing chain twisting and explosion as described in claim 1, characterized in that, The lower end of the accessory tooth extends to be flush with or close to but not beyond the lower edge of the fabric core.

9. The tooth structure for preventing chain twisting and explosion as described in claim 1, characterized in that, The chain tooth body includes a joint portion connected to the fabric core, and the main tooth and the top tooth are both disposed on the joint portion; the joint portion includes a core hole through which the fabric core passes; the extension height of the auxiliary tooth is greater than the dimension of the core hole in the height direction.

10. A zipper, characterized in that, Including a tooth structure as described in any one of claims 1-9 that facilitates chain twisting and explosion prevention.

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