Lead seal and its lock body

Abstract

This utility model discloses a lead lock and its lock body. The lock body includes a housing and a locking ring structure installed inside the housing. The housing has an insertion port, and the locking ring structure is installed at the insertion port end inside the housing. The locking ring structure includes a retaining spring, a base, and a top cover. The retaining spring includes an unsealed, annular spring body and hooks respectively vertically arranged at both ends of the spring body. The hooks at both ends are parallel and bent in the same direction. The base has a central shaft hole, and a spring mounting structure is provided on the inner wall of the shaft hole of the base to accommodate the retaining spring. The spring mounting structure includes a bearing edge for supporting the spring body and a hook groove for inserting the hooks. The top cover is used to press and limit the retaining spring within the spring mounting structure. The locking ring structure provided inside the lock body of this utility model, through the cooperation between the retaining spring, the base, and the top cover, forms an effective anti-cracking structure, greatly improving the security of the lead lock.

Description

Technical Field

[0001] This utility model relates to the field of RFID electronic lead seal technology, and in particular to a lead seal and its lock body. Background Technology

[0002] Lead-locked seals are tamper-proof sealing devices that use physical latches to verify whether goods have been opened without authorization during transport or use. For example, cargo hold doors on ocean-going ships remain locked during voyages, only being opened by breaking the lock at the destination. A lead-locked seal typically consists of a lock body and a mortise inserted into it. The principle is that a signal generator (RFID reader) is installed inside the lock body, and the mortise is either a steel rod or wire. Container lead-locked seals often use steel rods. The mortise acts as an electrical conductor; when the mortise is inserted into the lock body, the signal generator sends a signal indicating a locked state, while removing or damaging the mortise sends an open signal. Each mortise has a unique identification number, and its ability to be opened only by force gives it legal validity. It is widely used in customs supervision, electrical instrumentation, and logistics transportation. The lock body contains a locking ring structure that holds the inserted mortise ring in place. If the locking ring structure uses a retaining spring with its two ends forming a circle to hold the steel bar, this type of retaining spring is easily broken. It can be removed from the insertion port of the lock body with a flathead screwdriver. In practical use, before the lead seal is locked (before the steel bar is inserted), if someone removes the retaining spring with a flathead screwdriver and then locks the lock normally, the damage to the lead seal is not visible externally. The RFID reader will still show the tag as normally locked. Without the retaining spring, the steel bar cannot be stably held in place. Therefore, if someone exploits this vulnerability to tamper with or forge the lead seal, the physical locking control becomes ineffective, making it difficult to prevent fraudulent activities in the logistics and transportation system, resulting in the loss of protected items and economic losses. Utility Model Content

[0003] The purpose of this utility model is to provide an improved steel bar label lock body.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A lead-locked lock body includes a housing and a locking ring structure installed within the housing. The housing has an insertion port, and the locking ring structure is installed at the insertion port end within the housing. The locking ring structure includes a retaining spring, a base, and a top cover. The retaining spring includes an unsealed, annular spring body and hooks respectively perpendicularly disposed at both ends of the spring body. The hooks at both ends are parallel and bent in the same direction. The base has a central shaft hole, and a spring mounting structure is provided on the inner wall of the shaft hole of the base to accommodate the retaining spring. The spring mounting structure includes a bearing edge and a hook groove. The bearing edge supports the spring body, and the hook groove is for inserting the hooks. The top cover is used to press and limit the retaining spring within the spring mounting structure.

[0006] Furthermore, the end of the spring body is horizontally folded outward to form a transverse extension arm, and the end of the transverse extension arm is integrally vertically connected to a hook.

[0007] Furthermore, a stepped groove is provided on the end face of the base. The stepped groove is a two-stage stepped groove. The first-stage stepped surface serves as a cover mounting groove for installing the top cover, and the second-stage stepped surface serves as a bearing edge for placing the retaining spring.

[0008] Furthermore, the bearing edge is a plane, and a notch is radially opened on the inner circumference of the base along the surface of the bearing edge. The top surface of the notch penetrates a first-level step surface, and the radial extension length of the notch corresponds to the length of the transverse extension arm. The hook groove is opened on the bottom surface of the notch.

[0009] Furthermore, the bearing edge is a conical surface.

[0010] Furthermore, the top cover is a circular ring with a diameter similar to that of the cover groove, but its ring diameter is larger than that of the cover groove.

[0011] Furthermore, the hook groove is formed on the bearing edge, and the hook is directly and vertically connected to the end of the spring body.

[0012] Furthermore, the base is an annular body, with one end being an insertion end and the other end being an exit end. The hook groove extends toward the insertion end to a predetermined depth, and the hook groove extends along the outer circumferential arc surface of the base for a predetermined length.

[0013] In addition, this utility model provides a lead lock having the aforementioned lock body.

[0014] A lead lock includes a mortise and a lock body. One end of the mortise is an insertion end and the other end is a holding end. The insertion end has an annular groove so that, during installation, the spring body of the snap ring is compressed and fitted into the annular groove of the insertion end to hold the mortise.

[0015] Furthermore, the lock body includes a sensor seat installed inside the housing and corresponding to the lock ring structure, with the mortise inserted through the lock ring structure into the sensor seat.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes a lead lock, which adopts the lock body and sets the lock ring structure on the lock body. The lock ring structure is formed by the cooperation between the snap ring, the base and the top cover. The snap ring structure adopts the spring body and the snap hooks respectively set vertically at both ends of the spring body. In this way, the snap ring can be stably confined in the ring hole of the base and is not easy to fall out, forming an effective anti-cracking lock ring structure. When someone attempts to remove the snap ring from the insertion port with a flathead screwdriver before the steel bar is inserted, the snap ring is held in the hook groove by the snap hook, so that the snap ring cannot be removed, effectively enhancing the security of the lead lock. Attached Figure Description

[0017] Figure 1 This is a diagram showing the state of the lead lock body after it has been separated from the lead seal.

[0018] Figure 2 A three-dimensional view of the lead lock body;

[0019] Figure 3 A structural diagram showing the lock ring structure installed inside the lock body;

[0020] Figure 4 This is an exploded view of the locking ring structure inside the lock body;

[0021] Figure 5 This is a cross-sectional view from the first perspective after the lock ring structure is assembled.

[0022] Figure 6 This is a cross-sectional view from a second perspective after the locking ring structure is assembled.

[0023] Figure 7 A three-dimensional view of the lead seal inserted into the lock body;

[0024] Figure 8 A cross-sectional view of the lead seal inserted into the lock body;

[0025] The annotations in the attached figures are explained as follows:

[0026] Lock body 10; mortise cylinder 20; housing 11; lock ring structure 12; sensor base 13; snap ring 30; base 40; top cover 50; spring body 31; snap hook 32; shaft hole 41; spring mounting structure 42; bearing edge 421; hook groove 422; transverse extension arm 33; cover mounting groove 43; notch 44; tapered surface 45; ring groove 21. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of protection of this utility model.

[0028] Please see Figure 1 A lead lock includes a lock body 10 and a mortise 20, the mortise 20 being inserted into the lock body 10.

[0029] Please see Figures 2-3 The lock body 10 includes a housing 11 and a locking ring structure 12 installed in the housing 11. The housing 11 has an insertion port 111. The locking ring structure 12 is installed at the insertion port 111 end in the housing 11 so that the mortise 20 can be inserted and locked.

[0030] The lock body 10 further includes a sensing seat 13 installed inside the housing 11, corresponding to the lock ring structure 12, so that the mortise 20 passes through the lock ring structure 12 and is inserted into the sensing seat 13 to generate a sensing effect. It can be understood that the mortise 20 and the sensing seat 13 cooperate to form a lead seal, the specific structure and principle of which are not described in detail in this utility model.

[0031] See also Figures 4-6 The locking ring structure 12 includes a retaining spring 30, a base 40, and a top cover 50. The retaining spring 30 includes an unsealed, ring-shaped, elastic spring body 31 and hooks 32 vertically disposed at both ends of the spring body 31. The hooks 32 at both ends are parallel and bent in the same direction. The base 40 is a ring-shaped body with a central shaft hole 41, one end of which is an insertion end and the other end is an exit end, allowing the insert 20 to be inserted from the insertion end and the end of the insert 20 to be exited from the exit end. A spring mounting structure 42 is provided on the inner wall of the shaft hole of the base 40 to accommodate the retaining spring 30. The spring mounting structure 42 includes a bearing edge 421 and a hook groove 422. The bearing edge 421 supports the spring body 31, and the hook groove 422 allows the hooks 32 to be inserted. The top cover 50 is used to press and limit the retaining spring 122 within the spring mounting structure 42. Preferably, the hook groove 422 is formed on the bearing edge 421.

[0032] In this embodiment, the hook 32 is connected to the spring body 31 via a horizontal extension arm 33. Specifically, the end of the spring body 31 is horizontally folded outward to form the horizontal extension arm 33, and the end of the horizontal extension arm 33 is integrally and vertically connected to the hook 32. A stepped groove is provided on the protruding end face of the base 40. The stepped groove is a two-stage stepped groove. The first-stage step surface serves as a cover mounting groove 43 to accommodate the top cover 50, and the second-stage step surface is a plane, serving as a bearing edge 421 to place the spring body 31. Furthermore, on the inner circumferential surface of the base 40, a notch 44 is radially opened along the secondary step surface. The top surface of the notch penetrates the primary step surface. The radial extension length of the notch 44 roughly corresponds to the length of the transverse extension arm 33. The bottom surface of the notch 44, that is, flush with the secondary step surface, is provided with the hook groove 422. The hook groove 422 extends along the outer circumferential arc surface of the base 40 for a preset length so that the hooks 32 at both ends of the retaining spring 30 can open relative to each other. That is, after the insert 20 opens the spring body 31 of the retaining spring 30, the two hooks 32 have an openable space in the hook groove 422.

[0033] Understandably, if the hook groove 422 is provided on the bearing edge 421, then there is no need to provide the transverse extension arm 33, and the hook 32 is directly and vertically connected to the end of the spring body 31.

[0034] In this embodiment, the inner circumferential surface of the base 40 is provided with a notch 44 and a corresponding hook groove 422, so that the hook 32 can be inserted into any hook groove 422 according to the installation requirements.

[0035] Furthermore, the spring-loaded structure 42 and the central shaft hole 41 are connected by a tapered surface 45. This allows the lock body 10 to be suspended on the mortise 20. As the weight of the lock body 10 decreases, the spring body 31, in conjunction with the tapered surface 45, will tighten further, thus gripping the mortise 20 more tightly. Understandably, the bearing edge 421 can also be configured as a tapered surface, making the entire secondary step surface tapered.

[0036] The top cover 50 is a circular ring with a diameter larger than that of the cover groove, and is fixed in place by interference fit with the cover groove.

[0037] Please see Figures 7-8 The mortise 20 has an insertion end at one end and a holding end at the other. The holding end is the larger end and cannot pass through the lock hole of the door latch, while the insertion end can be inserted into the lock body 10 through the lock hole. The insertion end has an annular groove 21 for engaging with the snap ring 30. When the lead lock of this utility model is in use, the insertion end of the mortise 20 passes through the lock hole on the door latch and is inserted into the lock body 20 through the insertion port 111 of the housing 11. The insertion end passes through the lock ring structure 12, and after the snap ring 30's spring body 31 is opened, the two snap hooks 32 open relative to each other in the hook groove 422. When the snap ring 30's spring body 31 is fitted into the annular groove 21 of the insertion end, the snap ring 30's spring body 31 contracts and fits into the annular groove 21 of the insertion end to hold the mortise 20. At this time, the insertion end of the mortise 20 passes through the lock ring structure 12 and is inserted into the sensor seat 13. Typically, after the lead lock is engaged, the lock body 10 is suspended at the lower end of the mortise cylinder 20. As the lock body 10 moves downwards under its own weight, the base 40 moves downwards relative to the spring body 31. The opening formed by the conical surface 45 becomes smaller and smaller downwards, which compresses the spring body 31, making the spring body 31 tighter and tighter, thus holding the mortise cylinder 20 more tightly and making the locking more stable.

[0038] In summary, this utility model provides a lead lock, which employs a lock body 10 with a lock ring structure 12. The lock ring structure 12 is connected by a retaining spring 30, a base 40, and a top cover 50. The retaining spring 30 has a spring body 31 and hooks 32 vertically disposed at both ends of the spring body 31. This stably confines the retaining spring 30 within the shaft hole of the base 40, preventing it from easily coming out and forming an effective anti-breakage lock ring structure. If someone attempts to remove the retaining spring 30 from the insertion port 111 with a flathead screwdriver before inserting the insert 20, the retaining spring 30 cannot be removed because the hooks 32 of the retaining spring 30 are engaged in the hook groove 422. The above method cannot break the lock, effectively enhancing the security of the lead lock.

[0039] Any combination of different embodiments of this utility model, provided it does not violate the inventive concept of this utility model, shall be considered as the disclosure of this utility model; any simple modifications to the technical solution and any combination of different embodiments within the scope of the inventive concept of this utility model, without violating the inventive concept of this utility model, shall be within the protection scope of this utility model.

Claims

1. A lead-locked lock body, comprising a housing (11) and a locking ring structure (12) installed within the housing (11), the housing (11) having an insertion port (111), the locking ring structure (12) being installed at the insertion port (111) end within the housing (11), characterized in that: The locking ring structure (12) includes a retaining ring (30), a base (40), and a top cover (50). The retaining ring (30) includes an unsealed, annular spring body (31) and hooks (32) vertically arranged at both ends of the spring body (31). The hooks (32) at both ends are parallel and bent in the same direction. The base (40) has a shaft hole (41) at its center. A spring mounting structure (42) is provided on the inner wall of the shaft hole (41) of the base (40) to accommodate the retaining ring (30). The spring mounting structure (42) includes a bearing edge (421) and a hook groove (422). The bearing edge (421) is used to support the spring body (31), and the hook groove (422) is used to insert the hook (32). The top cover (50) is used to press and limit the retaining ring (122) within the spring mounting structure (42).

2. The lock body according to claim 1, characterized in that: The end of the spring body (31) is horizontally folded outward to form a transverse extension arm (33), and the end of the transverse extension arm (33) is integrally vertically connected to a hook (32).

3. The lock body according to claim 2, characterized in that: The base (40) has a stepped groove on its end face. The stepped groove is a two-stage stepped groove. The first-stage step surface serves as a cover mounting groove (43) for installing the top cover (50), and the second-stage step surface serves as a bearing edge (421) for placing the retaining spring (30).

4. The lock body according to claim 3, characterized in that: The bearing edge (421) is a plane, and a notch (44) is radially opened on the inner circumferential surface of the base (40) along the surface of the bearing edge (421). The top surface of the notch (44) is connected to a first-level step surface. The radial extension length of the notch (44) corresponds to the length of the transverse extension arm (33). The hook groove (422) is opened on the bottom surface of the notch (44).

5. The lock body according to claim 3, characterized in that: The bearing edge (421) is a conical surface.

6. The lock body according to claim 3, characterized in that: The top cover (50) is a circular ring with a diameter similar to that of the cover groove (43), but its ring diameter is larger than that of the cover groove (43).

7. The lock body according to claim 1, characterized in that: The hook groove (422) is opened on the bearing edge (421), and the hook (32) is directly and vertically connected to the end of the spring body (31).

8. The lock body according to claim 1, characterized in that: The base (40) is an annular body with one end being the insertion end and the other end being the exit end. The hook groove (422) extends toward the insertion end to a predetermined depth, and the hook groove (422) extends along the outer circumferential arc surface of the base (40) for a predetermined length.

9. A lead sealing ring, characterized in that: Includes a mortise (20) and a lock body (10) as described in any one of claims 1-8. One end of the mortise (20) is an insertion end and the other end is a holding end. The insertion end has an annular groove (21) so that when installed, the spring body (31) of the snap ring (30) is tightened and fitted into the annular groove (21) of the insertion end to hold the mortise (20).

10. The lead sealing ring according to claim 9, characterized in that: The lock body (10) includes a sensor seat (13) installed inside the housing (11) and corresponding to the lock ring structure (12), and the mortise (20) passes through the lock ring structure (12) and is inserted into the sensor seat (13).

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