Plastic seal with multiple locking function

Abstract

This utility model discloses a plastic seal with multiple locking functions, including a lock body assembly and a lock cylinder. The lock cylinder is a plastic lock cylinder and is separately arranged from the lock body assembly. The lock body assembly includes a lock body and a lock rod. A lock cylinder cavity is provided on the lock body near the lock rod. The plastic lock cylinder is disposed in the lock cylinder cavity. The plastic lock cylinder has multiple layers of locking teeth. Each layer of locking teeth includes several elastic arms. The elastic arms are provided with locking teeth. Several locking grooves are provided on the lock rod. The locking teeth on the elastic arms and the locking grooves on the lock rod are engaged in the locked state. The elastic arms are distributed circumferentially along the keyhole axis and apply radial locking force to the locking teeth. The plastic seal with multiple locking functions provided by this utility model solves the problems of security and recycling compatibility through the separate lock cylinder structure and radial elastic system. Each locking tooth has an elastic arm to provide radial locking force, thereby greatly improving the locking ability and reducing costs.

Description

Technical Field

[0001] This utility model relates to a plastic seal, and more particularly to a plastic seal with multiple locking functions. Background Technology

[0002] The plastic seal is made of ABS or PP, and the lock body uses a limiting structure, relying on the inherent elasticity of the plastic to lock in place. Plastic seals are mainly used in containers, trucks, vans, and other similar devices to seal packages and prevent theft. Existing plastic seals generally consist of a lock body and a lock cylinder. One side of the lock body is a marking surface, which can be customized with laser engraving, markings, codes, barcodes, colors, and other information. The lock body is roughly round or square, and contains a lock cylinder with a cover plate to secure it. Existing plastic seals mainly suffer from three types of technical defects: 1. One-piece plastic seal Although it is easy to recycle, it relies on the elastic locking of the locking teeth, which does not adequately shield the locking part; therefore, it is prone to elastic failure and can be illegally unlocked or forcibly damaged, resulting in insufficient security.

[0003] 2. Metal lock cylinder composite seal Due to differences in materials, manual disassembly and separation are required, resulting in low recycling efficiency. This greatly hinders the effective recycling and reuse of plastic and metal parts, reducing overall environmental benefits.

[0004] 3. Traditional split plastic lock cylinder The use of an axial or angled elastic structure for the locking rod results in physical limitations in locking and anti-pry capabilities, leading to insufficient safety performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plastic seal with multiple locking functions, which can solve the problems of security and recycling compatibility, greatly improve the locking ability, and reduce costs.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is to provide a plastic seal with multiple locking functions, including a lock body assembly and a lock cylinder. The lock cylinder is a plastic lock cylinder and is separately set from the lock body assembly. The lock body assembly includes a lock body and a lock rod. The lock body has a lock cylinder cavity near the lock rod. The plastic lock cylinder is located in the lock cylinder cavity. The plastic lock cylinder has multiple layers of locking teeth. Each layer of locking teeth includes several elastic arms. The elastic arms have locking teeth. The lock rod has several locking grooves. The locking teeth on the elastic arms and the locking grooves on the lock rod are engaged in the locked state. The elastic arms are distributed circumferentially along the keyhole axis and apply a radial locking force to the locking teeth.

[0007] Furthermore, the plastic lock cylinder is provided with a double-layer lock tooth component, each layer of lock tooth component includes 2-5 elastic arms, and the elastic arms on the double-layer lock tooth component are staggered and evenly distributed along the circumference.

[0008] Furthermore, each layer of locking teeth includes three elastic arms, and the elastic arms on the double-layer locking teeth are staggered and evenly distributed circumferentially at intervals of 30-60 degrees.

[0009] Furthermore, the elastic arm has a three-section structure, including a first support section, an elastic section, and a second support section connected in sequence. The second support section is connected to a locking tooth. The elastic section and the first support section form an angle of 90-120 degrees, and the elastic section and the second support section form an angle of 60-90 degrees.

[0010] Furthermore, the length of the elastic segment is twice or more the length of the second support segment.

[0011] Furthermore, one end of the locking rod is connected to the lock body, and the other end of the locking rod is the lock head. Several locking grooves are provided on the end of the locking rod near the lock head. In the locked state, the locking teeth on each layer of locking teeth engage with the locking grooves on the locking rod.

[0012] Furthermore, a positioning and shielding protrusion is provided at the end of the locking rod.

[0013] Furthermore, the lock body, lock rod, lock cylinder cavity, and lock head are integrally injection molded.

[0014] Furthermore, the lock cylinder cavity is located on one side of the lock body, and the other side of the lock body is the marking surface, with a lock rod insertion hole connecting to the lock cylinder cavity.

[0015] Furthermore, a lock cylinder cover plate is provided on the outside of the plastic lock cylinder, and the lock cylinder cover plate has a lock rod protrusion hole in the middle, and the lock cylinder cover plate is embedded in the lock cylinder cavity.

[0016] Compared with the prior art, the present invention has the following advantages: The plastic seal with multiple locking functions provided by the present invention solves the problems of security and recycling compatibility through the split lock cylinder structure and radial elastic system. Each lock tooth has an elastic arm to provide radial locking force, thereby greatly improving the locking ability and reducing the cost. Attached Figure Description

[0017] Figure 1 This is an exploded view of the plastic seal according to the first embodiment of the present invention; Figure 2 This is a schematic diagram of the assembled structure of the plastic seal according to the first embodiment of this utility model; Figure 3 This is a schematic diagram of the plastic lock core structure of the plastic seal according to the first embodiment of this utility model; Figure 4 A schematic diagram of the exploded structure of the plastic seal according to the second embodiment of this utility model; Figure 5 This is a schematic diagram of the plastic lock core structure of the plastic seal according to the second embodiment of this utility model.

[0018] The diagram is marked as follows: 1. Lock body; 2. Lock cylinder cavity; 3. Lock cylinder cover plate; 4. Lock rod; 5. Lock head; 6. Plastic lock cylinder; 7. Lock rod through hole; 8. Locking groove; 9. Positioning and shielding boss; 61. Spring arm; 62. Lock tooth; 611. First support section; 612. Spring section; 613. Second support section. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is an exploded view of the plastic seal according to the first embodiment of the present invention; Figure 2 This is a schematic diagram of the assembled structure of the plastic seal according to the first embodiment of this utility model.

[0021] Please see Figure 1 and Figure 2 The present invention provides a plastic seal with multiple locking functions, comprising a lock body assembly and a lock cylinder. The lock cylinder is a plastic lock cylinder 6 and is separately disposed from the lock body assembly. The lock body assembly includes a lock body 1 and a lock rod 4. A lock cylinder cavity 2 is provided on the lock body 1 near the lock rod 4. The plastic lock cylinder 6 is disposed in the lock cylinder cavity 2. The plastic lock cylinder 6 has multiple layers of locking teeth. Each layer of locking teeth includes several elastic arms 61. The elastic arms 61 are provided with locking teeth 62. The lock rod 4 is provided with several locking grooves 8. The locking teeth 62 on the elastic arms 61 and the locking grooves 8 on the lock rod 4 are engaged in the locked state. The elastic arms 61 are distributed circumferentially along the lock hole axis and apply radial locking force to the locking teeth 62.

[0022] This utility model provides a plastic seal with multiple locking functions, featuring an S-shaped elastic arm 61 distributed circumferentially along the locking rod 4 and aligned with the locking teeth. Through leverage, minute deformations are converted into powerful locking force. In a preferred embodiment, the plastic seal with multiple locking functions includes a double-layer locking tooth structure within the plastic lock core 6. Each layer of the locking tooth structure is a multi-lobed design, comprising 2-5 elastic arms 61. The elastic arms 61 on the double-layer locking tooth structure are staggered and evenly distributed circumferentially. This multi-layered locking tooth structure achieves a stepped engagement of the locking groove 8, requiring destruction of each layer to unlock. The multi-lobed design ensures that damage at a single point does not affect the overall locking function, achieving a redundant safety design. Preferably, each layer of the locking tooth structure includes 3 elastic arms 61, which are staggered and evenly distributed circumferentially at intervals of 30-60 degrees.

[0023] For a preferred embodiment, please refer to [link to preferred embodiment]. Figure 3 The plastic seal with multiple locking functions provided by this utility model has a three-section structure for the elastic arm 61, including a first support section 611, an elastic section 612, and a second support section 613 connected in sequence. The second support section 611 is connected to a locking tooth 62. The elastic section 612 and the first support section 611 form an angle of 90-120 degrees, and the elastic section 612 and the second support section 613 form an angle of 60-90 degrees. Preferably, the length of the elastic section 612 is twice or more the length of the second support section 613; by leveraging the principle, a small deformation is converted into a strong locking force, improving the mechanical efficiency by 2.1 times.

[0024] In a preferred embodiment, the plastic seal with multiple locking functions provided by this utility model has one end of the locking rod 4 connected to the lock body 1, and the other end of the locking rod 4 being a lock head 5. Several locking grooves 8 are provided on the locking rod 4 near the lock head 5; a positioning and shielding protrusion 9 is provided at the end of the locking rod 4; in the locked state, the locking teeth 62 on each layer of locking teeth engage with the locking grooves 8 on the locking rod 4. After the locking rod 4 passes through the lock cylinder hole, it then passes through the plastic lock cylinder 6. The plastic lock cylinder 6 retracts inward, thus effectively locking the locking rod 4 and achieving a one-way locking function.

[0025] This utility model provides a plastic seal with multiple locking functions, which can improve the flexibility and comfort of material selection. Because the lock cylinder is independent and made of plastic, the lock body can be made of softer, more skin-friendly, and environmentally friendly plastic materials, reducing skin contact pressure by 60%. This significantly improves the comfort and environmental performance of the seal during use, without compromising its excellent security performance.

[0026] This utility model provides a plastic seal with multiple locking functions, which greatly enhances locking ability and significantly improves security performance. Through an independent, split, multi-layered, multi-lobed lock cylinder design, and especially the special elastic engagement mechanism provided by the S-shaped elastic arm that applies radial force to the lock rod, combined with the protection of the anti-pry lock cylinder cover, the overall effect significantly improves the anti-illegal opening security of this utility model compared to traditional one-piece plastic seals and ordinary plastic lock cylinders. The engagement contact area is increased by 300%, and the shear strength is increased by 100%.

[0027] This utility model's plastic seal is easy to recycle and has excellent environmental benefits: unlike metal lock cylinder seals, both the lock body and lock cylinder of this utility model are made of plastic. During the recycling process, users or recycling organizations do not need to manually separate the two. This design completely solves the core problems of traditional metal-plastic composite seals, such as difficult separation and low recycling efficiency, increasing recycling efficiency by 80% and significantly improving the overall recycling and reuse rate of plastic components. Preferably, the lock body 1, lock rod 4, lock cylinder cavity 2, and lock head 5 are integrally injection molded, further improving efficiency and reducing assembly work.

[0028] This utility model provides a plastic seal with multiple locking functions. The lock cylinder cavity 2 is located on one side of the lock body 1 and is equipped with a lock head insertion indicator, which clearly indicates the insertion position of the lock head 5, improving the convenience of product use. The other side of the lock body 1 is a marking surface, which can be laser-marked or printed with personalized logos and is equipped with a lock rod insertion hole connecting to the lock cylinder cavity 2. A lock cylinder cover plate 3 is provided on the outside of the plastic lock cylinder 6. The lock cylinder cover plate 3 has a lock rod exit hole 7 in the middle and is embedded in the lock cylinder cavity 2. This completely covers the internal mechanism of the lock cylinder, blocks the insertion path of illegal tools, and significantly improves the ability to prevent illegal unlocking.

[0029] Figure 4 A schematic diagram of the exploded structure of the plastic seal according to the second embodiment of this utility model; Figure 5 This is a schematic diagram of the plastic lock core structure of the plastic seal according to the second embodiment of this utility model.

[0030] To simplify the manufacturing process while ensuring the ability to prevent unauthorized unlocking, the plastic seal of the second embodiment of this utility model adopts a double-layer locking tooth structure, with each layer of locking teeth having a double-lobed structure, forming a double-layer double-lobed locking tooth structure, such as... Figure 4 and Figure 5 As shown. At the same time, the shape of the elastic arm is optimized. At this time, one end of the elastic arm 61 is directly connected to the locking tooth 62, and the other end extends along the inner wall of the plastic lock core 6 to form an arc-shaped support section. The elastic arm 61 extends in the circumferential direction and applies radial force to the locking tooth 62, thereby breaking through the traditional axial elastic mode.

[0031] In summary, the plastic seal with multiple locking functions provided by this utility model solves the problems of security and recycling compatibility through a split lock cylinder structure and a radial elastic system. It integrates a multi-layer, multi-lobed lock tooth structure to achieve three-dimensional interlocking. The S-shaped elastic arm inside the lock cylinder applies radial locking force, breaking through the traditional axial elastic mode. This greatly improves the locking ability and can replace the metal lock cylinder, reducing costs.

[0032] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A plastic seal with multiple locking functions, comprising a lock body assembly and a lock cylinder, characterized in that, The lock cylinder is a plastic lock cylinder (6) and is separately set from the lock body assembly. The lock body assembly includes a lock body (1) and a lock rod (4). The lock body (1) has a lock cylinder cavity (2) near the lock rod (4). The plastic lock cylinder (6) is located in the lock cylinder cavity (2). The plastic lock cylinder (6) has multiple layers of locking teeth. Each layer of locking teeth includes several elastic arms (61). The elastic arms (61) have locking teeth (62). The lock rod (4) has several locking grooves (8). The locking teeth (62) on the elastic arms (61) and the locking grooves (8) on the lock rod (4) are engaged in the locked state. The elastic arms (61) are distributed along the circumferential axis of the lock hole and apply radial locking force to the locking teeth (62).

2. The plastic seal with multiple locking functions as described in claim 1, characterized in that, The plastic lock cylinder (6) is provided with a double-layer lock tooth component. Each layer of lock tooth component includes 2-5 elastic arms (61). The elastic arms (61) on the double-layer lock tooth component are staggered and evenly distributed along the circumference.

3. The plastic seal with multiple locking functions as described in claim 2, characterized in that, Each layer of locking teeth includes 3 elastic arms (61), and the elastic arms (61) on the double-layer locking teeth are staggered and evenly distributed at 30-60 degrees intervals along the circumference.

4. The plastic seal with multiple locking functions as described in claim 1, characterized in that, The elastic arm (61) has a three-section structure, including a first support section (611), an elastic section (612), and a second support section (613) connected in sequence. The second support section (613) is connected to a locking tooth (62). The elastic section (612) and the first support section (611) form an angle of 90-120 degrees, and the elastic section (612) and the second support section (613) form an angle of 60-90 degrees.

5. The plastic seal with multiple locking functions as described in claim 4, characterized in that, The length of the elastic segment (612) is twice or more the length of the second support segment (613).

6. The plastic seal with multiple locking functions as described in claim 1, characterized in that, One end of the locking rod (4) is connected to the lock body (1), and the other end of the locking rod (4) is the lock head (5). Several locking grooves (8) are provided on the end of the locking rod (4) near the lock head (5). In the locked state, the locking teeth (62) on each layer of locking teeth are engaged with the locking grooves (8) on the locking rod (4).

7. The plastic seal with multiple locking functions as described in claim 6, characterized in that, The end of the locking rod (4) is provided with a positioning shielding boss (9).

8. The plastic seal with multiple locking functions as described in claim 6, characterized in that, The lock body (1), lock rod (4), lock cylinder cavity (2) and lock head (5) are integrally injection molded.

9. The plastic seal with multiple locking functions as described in claim 1, characterized in that, The lock cylinder cavity (2) is located on one side of the lock body (1), and the other side of the lock body (1) is the marking surface, and a lock rod insertion hole is provided to connect the lock cylinder cavity (2).

10. The plastic seal with multiple locking functions as described in claim 1, characterized in that, The plastic lock cylinder (6) is provided with a lock cylinder cover plate (3), and the lock cylinder cover plate (3) has a lock rod through hole (7) in the middle. The lock cylinder cover plate (3) is embedded in the lock cylinder cavity (2).

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