Well lid lock with double unlocking modes
By integrating a dual unlocking structure of mechanical and electronic lock cylinders into the manhole cover lock, the problem of the manhole cover being unable to be opened due to the failure of the electronic lock cylinder is solved, enabling emergency unlocking and ensuring the rapid progress and safety of maintenance work.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-03-13
AI Technical Summary
Existing electronic manhole cover locks are prone to failure when the battery is depleted, components malfunction, or environmental interference occurs, resulting in the inability to quickly open the manhole cover, delaying maintenance work and causing safety hazards.
Design a manhole cover lock with a dual unlocking mode, integrating a mechanical lock cylinder and an electronic lock cylinder. Emergency unlocking is achieved by driving the mechanical lock cylinder with a mechanical key, ensuring that the manhole cover can still be opened normally when the electronic lock cylinder fails.
When the electronic lock cylinder fails, the mechanical lock cylinder can be driven by a mechanical key to achieve emergency unlocking, ensuring the rapid progress of underground facility maintenance and emergency work, and avoiding maintenance delays and security risks.
Smart Images
Figure CN121654285A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of manhole cover lock technology, and in particular to a manhole cover lock with a double unlocking mode. Background Technology
[0002] In municipal engineering, communication networks, power facilities, and other fields, manhole covers serve as critical protective components for underground facilities, and their safety and convenience directly impact facility operation and maintenance efficiency as well as public safety. With the increasing demand for intelligent operation and maintenance, traditional purely mechanical manhole cover locks are gradually being replaced by intelligent manhole cover locks with integrated electronic lock cylinders due to issues such as the need for dedicated personnel to carry special keys, cumbersome unlocking procedures, and the ease with which keys can be lost or copied.
[0003] Electronic manhole cover locks typically use methods such as password verification, card swiping, and remote signal control to drive the lock cylinder, enabling rapid unlocking and significantly simplifying daily maintenance procedures. They also enhance security against prying and unauthorized opening through electronic encryption technology, and are widely used in various municipal manhole cover scenarios. However, electronic lock cylinders can be divided into active and passive types. Active electronic lock cylinders rely on a built-in battery for power, while passive electronic lock cylinders rely on power transmitted when the electronic key is inserted. In actual use, they are susceptible to failure due to various factors: for example, failure to replace a depleted battery in time will completely disable the electronic unlocking function; prolonged exposure of the manhole cover to a damp underground environment or immersion in rainwater may cause short circuits or damage to electronic components; extreme low or high temperatures, or external impacts may also cause mechanical jamming or circuit failure in the electronic lock cylinder.
[0004] When the electronic lock cylinder fails, if the manhole cover lock does not have an effective emergency unlocking mechanism, maintenance personnel will not be able to open the manhole cover quickly. This will not only delay emergency work such as underground pipeline maintenance and troubleshooting, but may also cause road traffic safety hazards due to the inability to open the manhole cover in time (such as water accumulation and pipeline leakage risks). Therefore, there is an urgent need for a manhole cover lock with a dual unlocking mode to solve the above problems. Summary of the Invention
[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a manhole cover lock with a dual unlocking mode.
[0006] One embodiment of the present invention provides a technical solution to solve its technical problem: a manhole cover lock with a double-locking mode, installed on a manhole cover, including a base, a lock seat, a lock head, a clutch, an electronic lock cylinder, and a mechanical lock cylinder;
[0007] The lock seat is located inside the base; The lock head is located inside the base and has a clutch groove on it; The clutch component is located inside the base and has a clutch block, a first groove, and a second groove on it. The electronic lock cylinder is located inside the lock seat and has a first dial inserted into the first dial slot. The electronic lock cylinder has an unlocked state and a locked state. The mechanical lock cylinder is located inside the lock seat and has a second dial inserted into the second dial slot. The mechanical lock cylinder has an unlocked state and a locked state. When the electronic lock cylinder is in the unlocked state or the mechanical lock cylinder is in the unlocked state, the clutch block is driven to be inserted into the clutch groove by the first or second dial, so that the lock head can be unlocked by rotating the lock seat. Alternatively, when the electronic lock cylinder is in the locked state or the mechanical lock cylinder is in the locked state, the clutch block is driven to be pulled out of the clutch groove by the first or second dial, so that the lock seat can rotate freely relative to the lock head.
[0008] As one of the preferred embodiments of the present invention, a first limiting ring is provided on the inner side wall of the base, and a second limiting ring is provided on the outer side wall of the lock seat, which abuts against the lower end face of the first limiting ring. The upper end of the lock head is nested between the base and the lock seat, and the clutch is located between the lock seat and the lock head. The invention also includes a cover that is connected to the base and abuts against the lock head, with at least a portion of the lock head located outside the cover.
[0009] As one of the preferred embodiments of the present invention, a first annular waterproof groove is provided on the outer side wall of the second limiting ring, and a first annular waterproof ring that abuts against the inner side wall of the base is provided in the first annular waterproof groove.
[0010] As one of the preferred embodiments of the present invention, a second annular waterproof groove is provided on the outer side wall of the lock head, and a second annular waterproof ring is provided in the second annular waterproof groove to abut against the inner side wall of the base.
[0011] As one of the preferred embodiments of the present invention, a manhole cover lock with a double-unlocking mode also includes an operating component connected to the lock seat for operating the lock seat to rotate.
[0012] In one of the preferred embodiments of the present invention, the operating member is connected to the base through a first limiting component to limit the rotation angle of the operating member.
[0013] As one of the preferred embodiments of the present invention, the first limiting component includes a first arc-shaped groove disposed on the base and a first limiting post having one end connected to the operating member and the other end extending into the first arc-shaped groove.
[0014] As one of the preferred embodiments of the present invention, a second limiting component is provided between the lock head and the base to limit the rotation angle of the lock head.
[0015] As one of the preferred embodiments of the present invention, the second limiting component includes a second arc-shaped groove disposed on the base and a second limiting post having one end connected to the lock head and the other end extending into the second arc-shaped groove.
[0016] As one of the preferred embodiments of the present invention, a waterproof cover is provided on the base to cover the electronic lock cylinder and the mechanical lock cylinder.
[0017] The beneficial effects of this invention are as follows: A manhole cover lock with a dual-unlocking mode is installed on a manhole cover and includes a base, a lock seat, a lock head, a clutch component, an electronic lock cylinder, and a mechanical lock cylinder; the lock seat is disposed within the base; the lock head is disposed within the base and has a clutch groove thereon; the clutch component is disposed within the base and has a clutch block, a first shift groove, and a second shift groove thereon; the electronic lock cylinder is disposed within the lock seat and has a first shift head inserted into the first shift groove, and the electronic lock cylinder has an unlocked state and a locked state; the mechanical lock cylinder is disposed within the lock seat and has a second shift head inserted into the second shift groove. The mechanical lock cylinder has both unlocked and locked states. By integrating a dual unlocking structure of mechanical and electronic lock cylinders, when the electronic lock cylinder fails due to battery depletion, component failure, environmental interference, or other reasons, maintenance personnel can drive the mechanical lock cylinder with a mechanical key to achieve emergency unlocking without relying on the electronic system. This completely solves the pain point of traditional single electronic lock cylinders where electronic failure prevents opening, ensuring that emergency work such as underground facility maintenance and troubleshooting can be carried out quickly, and effectively avoiding maintenance delays and public safety risks caused by the inability to open manhole covers. Attached Figure Description
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the first structure of a manhole cover lock with a double unlocking mode; Figure 2 This is a schematic diagram of the second structure of a manhole cover lock with a double-unlocking mode; Figure 3 An exploded view of a manhole cover lock with a double-unlocking mode; Figure 4 A cross-sectional view of a manhole cover lock with a double-unlocking mode; Figure 5 for Figure 4 A magnified view of a portion of region A in the middle. Detailed Implementation
[0019] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.
[0020] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0022] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.
[0023] Reference Figures 1-5 A double-locking manhole cover lock, installed on a manhole cover, includes a base 10, a lock seat 20, a lock head 30, a clutch 40, an electronic lock cylinder 50, and a mechanical lock cylinder 60. Lock seat 20 is disposed within base 10; The lock head 30 is disposed inside the base 10 and has a clutch groove 31 thereon; The clutch component 40 is disposed within the base 10 and has a clutch block 41, a first groove 42, and a second groove 43 disposed thereon; The electronic lock cylinder 50 is disposed in the lock base 20 and has a first dial 51 inserted into the first dial slot 42. The electronic lock cylinder 50 has an unlocked state and a locked state. The mechanical lock cylinder 60 is disposed within the lock base 20 and has a second dial 61 inserted into the second dial slot 43. The mechanical lock cylinder 60 has an unlocked state and a locked state. When the electronic lock cylinder 50 or the mechanical lock cylinder 60 is in the unlocked state, the clutch block 41 is driven to be inserted into the clutch groove 31 by the first dial 51 or the second dial 61, so that the lock head 30 can be unlocked by rotating the lock seat 20. Alternatively, when the electronic lock cylinder 50 or the mechanical lock cylinder 60 is in the locked state, the clutch block 41 is driven to be pulled out of the clutch groove 31 by the first dial 51 or the second dial 61, so that the lock seat 20 can rotate freely relative to the lock head 30.
[0024] In this invention, a manhole cover lock is installed on the manhole cover and cooperates with the locking structure on the manhole cover. When the manhole cover lock is in the locked state, it can lock the manhole cover at the manhole opening. When the manhole cover lock is in the unlocked state, it can release the lock on the manhole cover, allowing the manhole cover to be removed from the manhole opening or rotated open. This is prior art, and this invention will not elaborate on it, nor should it be considered a limitation of this invention. Specifically, when it is necessary to open the manhole cover, maintenance personnel can use an authorized electronic key to operate the electronic lock cylinder 50, causing the electronic lock cylinder 50 to enter the unlocked state, thereby releasing the lock on the manhole cover. When the electronic lock cylinder 50 fails, maintenance personnel can also use a mechanical key to operate the mechanical lock cylinder 60, causing the mechanical lock cylinder 60 to enter the unlocked state, thereby releasing the lock on the manhole cover, thus enabling emergency unlocking of the manhole cover.
[0025] Reference Figures 1-5 In some embodiments, a first limiting ring 11 is provided on the inner sidewall of the base 10, and a second limiting ring 21 is provided on the outer sidewall of the lock seat 20, which abuts against the lower end face of the first limiting ring 11. The upper end of the lock head 30 is nested between the base 10 and the lock seat 20. The clutch 40 is located between the lock seat 20 and the lock head 30. The lock head 30 also includes a cover 12 connected to the base 10 and abutting against the lock head 30. At least a portion of the lock head 30 is located outside the cover 12.
[0026] Specifically, during assembly, the electronic lock cylinder 50 and the mechanical lock cylinder 60 are first inserted into the lock base 20 from bottom to top, with the upper end of the electronic lock cylinder 50 aligned with the first keyhole 22 on the lock base 20 and the upper end of the mechanical lock cylinder 60 aligned with the second keyhole 23 on the lock base 20. Then, the clutch 40 is placed against the lower part of the electronic lock cylinder 50 and the mechanical lock cylinder 60, with the first dial 51 inserted into the first dial slot 42 and the second dial 61 inserted into the second dial slot 43. Finally, the bottom cover 14 is placed against the lower part of the clutch 40 and connected to the lock base 20 via the first bolt structure 96, thereby confining the electronic lock cylinder 50, the mechanical lock cylinder 60, and the clutch 40 within the lock base 20 and forming the overall lock body. Next, the upper end of the lock head 30 is fitted onto the lower part of the lock body assembly. It should be noted that the clutch 40 should be moved back into the lock seat 20 first to avoid the clutch block 41 obstructing the assembly of the lock head 30. Then, the lock body assembly and the lock head 30 are placed into the base 10 from bottom to top, so that the second limiting ring 21 on the outer wall of the lock seat 20 abuts against the lower end face of the first limiting ring 11. Then, the cover 12 is connected to the base 10 through the second bolt structure 94, thereby confining the lock body assembly and the lock head 30 within the base 10. Finally, the cover 12 is connected to the manhole cover through the third bolt structure 95. At least a part of the lock head 30 is located on the outside of the cover 12, thereby cooperating with the locking structure on the manhole cover.
[0027] Reference Figures 1-5In some embodiments, a first annular waterproof groove 71 is provided on the outer wall of the second limiting ring 21, and a first annular waterproof ring 72 abutting against the inner wall of the base 10 is provided in the first annular waterproof groove 71. In a further embodiment, a second annular waterproof groove 73 is provided on the outer wall of the lock head 30, and a second annular waterproof ring 74 abutting against the inner wall of the base 10 is provided in the second annular waterproof groove 73. Specifically, during assembly, the first annular waterproof ring 72 is first fitted into the first annular waterproof groove 71 on the outer wall of the second limiting ring 21, and the second annular waterproof ring 74 is fitted into the second annular waterproof groove 73 on the outer wall of the lock head 30. Then, the entire assembly is placed into the base 10 from bottom to top. The waterproof effect is achieved by the abutting of the first annular waterproof ring 72 and the second annular waterproof ring 74 against the inner wall of the base 10, preventing seepage into the electronic lock cylinder 50 and the mechanical lock cylinder 60.
[0028] Reference 3- Figure 5 In some embodiments, the electronic lock cylinder 50 includes a housing 53, a conductive pin 54, a control board 55, and a motor 56. A mating interface 52 is provided at the front end of the housing 53, and the conductive pin 54 is located at the mating interface 52. The control board 55 and the motor 56 are housed within the housing 53 and are electrically connected to the conductive pin 54 and the motor 56. The output end of the motor 56 is connected to a first dial 51, which is eccentrically positioned to drive the clutch 40 to reciprocate. It should be noted that the electronic lock cylinder 50 in this invention is preferably a passive electronic lock cylinder. That is, when a maintenance personnel holds an authorized electronic key and mates with the conductive pin 54, the control board 55 and the motor 56 obtain the necessary electrical energy from the electronic key. When the electronic key and the control board 55 interlock and the verification is successful, the motor 56 will start, thereby realizing the electronically controlled drive of the clutch 40. (Refer to 3-) Figure 4 In some embodiments, the mechanical lock cylinder 60 may be a common mechanical lock cylinder, which is used to unlock and lock by a mechanical key, and will not be described in detail here.
[0029] Reference 1- Figure 4In some embodiments, a double-locking manhole cover lock further includes an operating component 13 connected to the lock seat 20 for rotating the lock seat 20. Specifically, the operating component 13 is preferably a wrench, the other end of which is adapted to the upper end of the lock seat 20. For example, the other end of the wrench has a shaped hole, and the upper end of the lock seat 20 has a shaped protrusion adapted to it, thereby enabling the wrench and the lock seat 20 to be linked. Furthermore, the base 10 is provided with a protective cover covering the electronic lock cylinder 50 and the mechanical lock cylinder 60. The other end of the water cover 90 is connected to the collar 92 via a flexible connecting strip 91. The collar 92 is also provided with a special-shaped hole that matches the upper end of the lock base 20. The collar 92 abuts against the upper end face of the wrench and is connected to the wrench and the lock base 20 via the fourth bolt structure 93. When in use, the water cover 90 can cause the flexible connecting strip 91 to deform and flip over to cover the electronic lock cylinder 50 and the mechanical lock cylinder 60, which can protect the electronic lock cylinder 50 and the mechanical lock cylinder 60 and provide waterproofing.
[0030] Referring to 3, in some embodiments, the operating member 13 is connected to the base 10 via a first limiting component 80a to limit the rotation angle of the operating member; preferably, the first limiting component 80a includes a first arcuate groove 81a disposed on the base 10 and a first limiting post 82a with one end connected to the operating member 13 and the other end extending into the first arcuate groove 81a.
[0031] Referring to 2, in some embodiments, a second limiting component 80b is provided between the lock head 30 and the base 10 to limit the rotation angle of the lock head 30; preferably, the second limiting component 80b includes a second arcuate groove 81b provided on the base 10 and a second limiting post 82b with one end connected to the lock head 30 and the other end extending into the second arcuate groove 81b.
[0032] The advantages of this invention are as follows: By integrating a dual unlocking structure of mechanical lock cylinder and electronic lock cylinder, when the electronic lock cylinder fails due to battery depletion, component failure, environmental interference, or other reasons, maintenance personnel can drive the mechanical lock cylinder with a mechanical key, achieving emergency unlocking without relying on the electronic system. This completely solves the pain point of traditional single electronic lock cylinders where electronic failure prevents opening, ensuring that emergency work such as underground facility maintenance and fault diagnosis can be carried out quickly, and effectively avoiding maintenance delays and public safety risks caused by the inability to open manhole covers.
[0033] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.
Claims
1. A manhole cover lock with a double-unlocking mode, installed on a manhole cover, characterized in that: Includes base (10), lock seat (20), lock cylinder (30), clutch (40), electronic lock cylinder (50) and mechanical lock cylinder (60); The lock seat (20) is disposed within the base (10); The lock head (30) is disposed in the base (10) and has a clutch groove (31) thereon; The clutch (40) is disposed in the base (10) and has a clutch block (41), a first groove (42) and a second groove (43) thereon; The electronic lock cylinder (50) is disposed in the lock base (20) and has a first dial (51) inserted in the first dial slot (42). The electronic lock cylinder (50) has an unlocked state and a locked state. The mechanical lock cylinder (60) is disposed in the lock seat (20) and has a second dial (61) inserted in the second dial slot (43). The mechanical lock cylinder (60) has an unlocked state and a locked state. When the electronic lock cylinder (50) is in the unlocked state or the mechanical lock cylinder (60) is in the unlocked state, the clutch block (41) is driven to be inserted into the clutch groove (31) by the first dial (51) or the second dial (61) so that the lock head (30) can be unlocked by rotating the lock seat (20). Alternatively, when the electronic lock cylinder (50) is in the locked state or the mechanical lock cylinder (60) is in the locked state, the clutch block (41) is driven to be pulled out from the clutch groove (31) by the first dial (51) or the second dial (61) so that the lock seat (20) can rotate freely relative to the lock head (30).
2. A manhole cover lock with a double unlocking mode according to claim 1, characterized in that: The base (10) has a first limiting ring (11) on its inner sidewall and a second limiting ring (21) on its outer sidewall that abuts against the lower end face of the first limiting ring (11). The upper end of the lock head (30) is nested between the base (10) and the lock seat (20). The clutch (40) is located between the lock seat (20) and the lock head (30). The base (10) is connected to the base (10) and abuts against the lock head (30). At least a portion of the lock head (30) is located outside the cover (12).
3. A manhole cover lock with a double unlocking mode according to claim 2, characterized in that: The second limiting ring (21) has a first annular waterproof groove (71) on its outer side wall, and a first annular waterproof ring (72) that abuts against the inner side wall of the base (10) is provided in the first annular waterproof groove (71).
4. A manhole cover lock with a double unlocking mode according to claim 2, characterized in that: A second annular waterproof groove (73) is provided on the outer wall of the lock head (30), and a second annular waterproof ring (74) is provided in the second annular waterproof groove (73) to abut against the inner wall of the base (10).
5. A manhole cover lock with a double unlocking mode according to claim 1, characterized in that: It also includes an operating element (13) connected to the lock seat (20) for operating the lock seat (20) to rotate.
6. A manhole cover lock with a double unlocking mode according to claim 5, characterized in that: The operating element (13) is connected to the base (10) via a first limiting component (80a) to limit the rotation angle of the operating element.
7. A manhole cover lock with a double unlocking mode according to claim 6, characterized in that: The first limiting component (80a) includes a first arcuate groove (81a) disposed on the base (10) and a first limiting post (82a) with one end connected to the operating member (13) and the other end extending into the first arcuate groove (81a).
8. A manhole cover lock with a double unlocking mode according to claim 1, characterized in that: A second limiting component (80b) is provided between the lock head (30) and the base (10) to limit the rotation angle of the lock head (30).
9. A manhole cover lock with a double unlocking mode according to claim 8, characterized in that: The second limiting component (80b) includes a second arcuate groove (81b) disposed on the base (10) and a second limiting post (82b) with one end connected to the lock head (30) and the other end extending into the second arcuate groove (81b).
10. A manhole cover lock with a double unlocking mode according to claim 1, characterized in that: A waterproof cover (90) is provided on the base (10) and covers the electronic lock cylinder (50) and the mechanical lock cylinder (60).