Guardrail lock with double locking function
By designing a double-locking guardrail lock, which combines mechanical lock cylinder and circuit board sensor detection, the problem of lack of bolt insertion feedback in existing guardrail locks is solved. This achieves accurate detection and double confirmation of bolt insertion status, improving the security and management reliability of the guardrail lock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-10
- Publication Date
- 2026-04-14
AI Technical Summary
Existing guardrail locks lack a feedback channel to ensure that the bolt is stably inserted into the locking position, which affects the usability and safety. Furthermore, the lack of dual confirmation between mechanical and electromagnetic locks results in poor reliability and practicality when entering and exiting the guardrail.
Design a guardrail lock with dual locking, combining a mechanical lock cylinder and a circuit board. Through the cooperation of a sensor and a detection switch, it ensures accurate detection of the latch insertion state and provides dual feedback confirmation of mechanical and electrical signals.
It achieves precise feedback on the bolt insertion status, improves the security and operational reliability of the guardrail lock, and ensures effective safety management when entering and exiting the guardrail.
Smart Images
Figure CN224120066U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of guardrail locks, specifically to a guardrail lock with double locking. Background Technology
[0002] As an important security device, guardrail locks play a crucial role in numerous fields. These include, but are not limited to, guardrails in industrial production areas, public facilities, and maintenance areas. For example, maintenance areas in airports, subways, and high-speed rail stations are often enclosed by guardrails, allowing only internal maintenance personnel to enter. Within the enclosed area, specific entrances are provided for personnel access, and currently, chain locks or padlocks are commonly used. Standard maintenance access door locks include mechanical locks and electric bolt locks.
[0003] However, existing guardrail locks have some obvious drawbacks. For conventional mechanical padlocks, current technology generally lacks a feedback mechanism to indicate whether the guardrail passage is closed when people enter or exit, thus affecting usability and management security. While existing electric bolt locks can sense the position of a magnet on the door side to indicate whether the door is locked or unlocked, in practice, many problems arise during the installation and use of guardrail doors, such as loose door structures leading to misalignment and excessive gaps during opening and closing, significantly reducing the electric bolt lock's ability to sense door status. Furthermore, for locking authentication using only mechanical or electronic locks, it remains difficult to ensure confirmation of personnel entry and exit, affecting the reliability and practicality of locking when users enter or exit the guardrail. Utility Model Content
[0004] The purpose of this utility model is to solve the above-mentioned defects and provide a guardrail lock with dual locking. This solves the technical problems in the prior art, where the structure of existing guardrail locks makes it difficult to detect whether the bolt is stably inserted into the locking position, affecting the locking feedback of the guardrail bolt. At the same time, existing guardrail locks do not easily perform mechanical and electromagnetic dual feedback confirmation of bolt locking, resulting in poor use effect and security of the guardrail lock.
[0005] The objective of this utility model is achieved through the following means:
[0006] A double-locking guardrail lock includes a housing and a circuit board disposed within the housing. The housing has an insertion hole for a latch. A drive unit is mounted on the housing via a receiving groove. The housing has a first sliding groove communicating with the receiving groove, the middle of which is connected to the insertion hole. A slidable locking piece is disposed within the first sliding groove, and the locking piece has a locking hole. The drive end of the drive unit extends into the first sliding groove and connects to one end of the locking piece, allowing the drive unit to drive the locking piece to move along the first sliding groove to lock or unlock. A sensing piece is disposed within the housing via a second sliding groove, and the sensing piece has a positioning hole communicating with the insertion hole. The sensing piece can move along the second sliding groove towards the circuit board. A detection switch for detecting latch insertion or removal is electrically connected to the circuit board. A first elastic element within the housing provides a continuous elastic force to the sensing piece, moving it away from the detection switch. A lock head is disposed within the housing, and a key rotating plate is connected to the lock head. The key rotating plate has a locking slot for matching the sensing piece. The lock head can drive the key rotating plate to rotate via a lock cylinder.
[0007] The latch has an insertion end and a locking part. When the insertion end passes through the locking hole and the positioning hole in sequence along the insertion hole, the sensing plate is pressed by the latch and moves toward the detection switch. The circuit board receives the latch insertion signal, and the driving component drives the locking plate to move. It locks itself by locking the locking hole and the locking part. The lock head can drive the key turn plate to rotate smoothly.
[0008] When the end of the insertion end is not inserted into the positioning hole, the first elastic element provides a continuous elastic force to the sensing plate that approaches the lock head, causing one end of the sensing plate to engage and match with the locking slot. The circuit board does not receive the latch insertion signal, and the key rotation plate and the sensing plate form a locking lock.
[0009] Further, as described above, the interior of the housing has a connecting groove for mounting the lock cylinder. The lock cylinder is paired and mounted in the connecting groove, with one end of the lock cylinder protruding outside the housing. The key rotating plate is mounted on the lock cylinder. A limiting protrusion is formed in the connecting groove. The key rotating plate has a first limiting part and a second limiting part. The lock cylinder can drive the key rotating plate to perform locking or unlocking actions. When the latch passes through the locking hole and the positioning hole in sequence, the key rotating plate rotates to make the first limiting part contact the limiting protrusion. When the latch only passes through the locking hole or is pulled out, the sensing plate is subjected to the continuous elastic force of the first elastic element, and the second limiting part of the key rotating plate contacts the limiting protrusion, so that the sensing plate is engaged with the locking slot.
[0010] By adding a mechanical lock cylinder, when the latch is not inserted or not fully inserted into the positioning hole, the sensing plate is locked and limited by the continuous elastic force of the first elastic element against the locking slot of the key rotating plate. At this time, when a person inserts the key into the lock cylinder to lock, the mechanical key cannot be pulled out of the lock cylinder because the latch is not properly inserted. This provides mechanical feedback to the person on the locking status of the latch, solving the problem of the lack of locking status confirmation in existing guardrail locks and improving operational safety.
[0011] Furthermore, as described above, a rolling ball is provided in the first slide groove. The ball is located at one end of the first slide groove near the lock head, and the ball contacts the end of the locking plate near the lock head. A latch is provided on the key rotating plate to engage and match the ball, so that the locking plate can drive the ball to engage and match with the latch.
[0012] The ball bearing and key-rotating plate latching structure achieves mechanical limiting through the ball bearing when the locking piece moves. At the same time, the ball bearing is used to extend the locking piece, improving the smoothness of the locking piece's movement along the first slide groove.
[0013] Furthermore, as described above, one end of the first slide groove is connected to the receiving groove, and the other end of the first slide groove forms a limiting part. The driving member can drive the locking piece to extend and retract along the first slide groove toward the receiving groove through the driving end.
[0014] When the latch is inserted into the socket and the insertion part passes through the positioning hole, the detection switch detects the sensing plate, and the circuit board controls the driving unit to drive the locking plate to retract and move along the first slide groove, so that the locking plate is engaged with the locking plate of the latch through the locking hole, thereby forming a locked state.
[0015] Furthermore, as described above, the locking piece is provided with a connecting end at one end near the driving member. The driving member is connected to the connecting end through the driving end, and the driving end of the driving member is used by a second elastic member to provide a continuous elastic force to the locking piece away from the receiving groove.
[0016] The second elastic element provides a continuous elastic force to the locking piece, moving it away from the receiving groove, further ensuring the stability and reliability of the locking piece.
[0017] Optionally, in some embodiments, the electronic locking method of the moving locking piece driven by the driving element can be energized to lock and de-energized to lock, or energized to lock and de-energized to lock, thereby adapting to different usage needs and improving applicability and practicality.
[0018] Furthermore, as described above, the first slide groove and the second slide groove are arranged in parallel, and the insertion hole is vertically connected to the first slide groove and the second slide groove in sequence.
[0019] Furthermore, as described above, the interior of the box is provided with a mounting slot for mounting a circuit board, and the box is provided with a ribbon cable hole that communicates with the mounting slot.
[0020] Furthermore, as described above, the first elastic element applies a continuous pushing force to the sensing sheet, causing the positioning hole of the sensing sheet and the insertion hole to overlap in an interlaced manner. When the latch passes through the insertion end into the insertion hole and enters the positioning hole, the latch applies a pressing force relative to the first elastic element to the sensing sheet, causing the positioning hole and the insertion hole to be coaxially arranged.
[0021] The sensor plate, under the action of the first elastic element, causes the positioning hole and the insertion hole to partially overlap. The sensor plate is only pushed open and the detection switch is triggered when the latch is correctly inserted. This structure effectively filters false signals caused by misinsertion or a loose door, ensuring the accuracy of latch positioning detection and solving the problem of misjudgment caused by door deformation in traditional electric bolt locks.
[0022] Specifically, in this embodiment, the insertion hole is a blind hole, and the insertion end of the latch has an inclined chamfer so that the latch can pass through the positioning hole. When the insertion end passes through the positioning hole, the positioning hole and the insertion hole overlap in an intersecting part, and the positioning hole and the insertion hole are coaxially arranged, thereby causing the sensing plate to move towards the detection switch, so as to stably detect the insertion of the latch.
[0023] Furthermore, as described above, the first elastic element and the second elastic element are composed of springs.
[0024] Furthermore, as described above, the electronic lock is configured to operate in either a wired communication mode or a battery-powered wireless communication mode.
[0025] The beneficial effects of this utility model are as follows: Through the cooperative design of the sensing plate and the detection switch, when the insertion end passes through the locking hole and the positioning hole in sequence, the sensing plate is squeezed and triggers the detection switch. The circuit board receives the insertion signal of the latch, which can accurately reflect the actual insertion state of the latch, effectively solve the problem of misjudgment caused by the gap of the door body in the electric bolt lock, provide clear confirmation of the locking status for the management personnel, and improve the safety management of the guardrail passage.
[0026] Simultaneously, once the latch is correctly inserted, the detection switch detects that the latch is fully inserted, and the drive unit performs a locking operation. This, combined with the mechanical lock head, verifies the locking via the key. When the latch is correctly inserted, the sensor plate is compressed away from the lock head, causing one end of the sensor plate to disengage from the latching slot. At this point, the key locking plate, under the action of the mechanical key, can smoothly rotate and enter the locked position, allowing the key to be removed. However, if the latch is not fully inserted into the positioning hole, the sensor plate and the latching slot remain in a latching pair, preventing the key rotation plate from rotating and removing the latch. This provides personnel with a confirmation of the latch's locked state, achieving dual feedback confirmation of latch insertion and improving the security and effectiveness of the guardrail lock's access control. Attached Figure Description
[0027] Figure 1 This is a three-dimensional structural diagram of the first direction in this embodiment;
[0028] Figure 2 This is a three-dimensional structural diagram of the second direction in this embodiment;
[0029] Figure 3 This is a schematic diagram of the overall structure of this embodiment;
[0030] Figure 4 This is a schematic diagram showing the insertion and locking state of the latch and the housing in this embodiment;
[0031] Figure 5 This is a schematic plan view showing the latch in the unlocked / pull-out state in this embodiment;
[0032] Figure 6 This is a schematic diagram of the rotation and locking state of the key rotation plate in this embodiment;
[0033] Figure 7 This is a schematic diagram illustrating the movement of the sensing element towards the detection switch in this embodiment;
[0034] Figure 8 This is a schematic diagram showing the locking state between the key rotating plate and the sensor plate in this embodiment;
[0035] The reference numerals in the figure are as follows: 100-box body, 101-insertion hole, 102-accommodating groove, 103-first sliding groove, 104-second sliding groove, 105-mounting groove, 106-wiring hole, 107-connection groove, 108-limiting protrusion, 200-circuit board, 300-driving component, 400-locking piece, 401-locking hole, 402-connection end, 500-sensing piece, 501-positioning hole, 600-detection switch, 700-first elastic element, 800-second elastic element, 900-latch, 901-insertion end, 902-locking part;
[0036] 1000-Lock head, 2000-Key turning plate, 2001-Card slot, 2002-First limit part, 2003-Second limit part, 2004-Block, 3000-Ball bearing. Detailed Implementation
[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0038] In this embodiment, refer to Figures 1-8The present invention relates to a double-locking guardrail lock, comprising a housing 100 and a circuit board 200 disposed within the housing 100. The housing 100 has an insertion hole 101 for a latch 900. A drive member 300 is mounted on the housing 100 via a receiving groove 102. A first sliding groove 103 communicating with the receiving groove 102 is provided within the housing 100. The middle portion of the first sliding groove 103 is connected to the insertion hole 101, and a slidable locking piece 400 is provided within the first sliding groove 103. The locking piece 400 has a locking hole 401. The drive end of the drive member 300 extends into the first sliding groove 103 and connects to one end of the locking piece 400, allowing the drive member 300 to drive the locking piece 400 to move along the first sliding groove 103 to lock or unlock. The lock has a housing 100 containing a sensor 500 via a second slide 104. The sensor 500 has a positioning hole 501 that communicates with the insertion hole 101. The sensor 500 can move along the second slide 104 toward the circuit board 200. The circuit board 200 is electrically connected to a detection switch 600 for detecting the insertion or removal of the latch 900. The housing 100 contains a first elastic member 700 that provides a continuous elastic force to the sensor 500 away from the detection switch 600. The housing 100 contains a lock head 1000, which is connected to a key rotating plate 2000. The key rotating plate 2000 has a locking slot 2001 for matching the sensor 500. The lock head 1000 can rotate the key rotating plate 2000 via the lock cylinder.
[0039] The latch 900 has an insertion end 901 and a locking part 902. When the insertion end 901 passes through the locking hole 401 and the positioning hole 501 in sequence along the insertion hole 101, the sensing plate 500 is pressed by the latch 900 and moves toward the detection switch 600. The circuit board 200 receives the insertion signal of the latch 900, and the driving member 300 drives the locking plate 400 to move. It is locked by locking the locking part 902 through the locking hole 401. The lock head 1000 can drive the key turning plate 2000 to rotate smoothly.
[0040] When the end of the insertion end 901 is not inserted into the positioning hole 501, the first elastic element 700 provides a continuous elastic force to the sensing piece 500 that approaches the lock head 1000, causing one end of the sensing piece 500 to engage with the retaining slot 2001. The circuit board 200 does not receive the insertion signal of the latch 900, and the key rotation plate 2000 and the sensing piece 500 form a retaining lock.
[0041] In the specific implementation process: when the latch 900 is not fully inserted, the first elastic element 700 pushes the sensing piece 500 to engage with the locking slot 2001 of the key rotating plate 2000 to form a mechanical limit. This structure can prevent the guardrail lock from being in an unlocked state due to operational negligence. At the same time, through the further locking feedback of the key, the physical protection level of the guardrail lock is improved.
[0042] The housing 100 has a connecting groove 107 inside for mounting a lock cylinder 1000. The lock cylinder 1000 is paired and mounted in the connecting groove 107, with one end of the lock cylinder 1000 protruding outside the housing 100. A key rotating plate 2000 is mounted on the lock cylinder 1000. A limiting protrusion 108 is formed inside the connecting groove 107. A first limiting part 2002 and a second limiting part 2003 are formed on the key rotating plate 2000. The lock cylinder 1000 can drive the key rotating plate 2000 to rotate. During the locking or unlocking action, when the latch 900 passes through the locking hole 401 and the positioning hole 501 in sequence, the key rotating plate 2000 rotates to make the first limiting part 2002 contact the limiting protrusion 108. When the latch 900 only passes through the locking hole 401 or is pulled out, the sensing piece 500 is subjected to the continuous elastic force of the first elastic member 700, and the second limiting part 2003 of the key rotating plate 2000 contacts the limiting protrusion 108, so that the sensing piece 500 is engaged with the holding slot 2001.
[0043] By adding a mechanical lock head 1000, when the latch 900 is not inserted or not fully inserted into the positioning hole 501, the sensing plate 500 is locked and limited by the continuous elastic force of the first elastic element 700 against the locking slot 2001 of the key rotating plate 2000. At this time, when a person locks the lock head 1000 by inserting the key, the mechanical key cannot be pulled out of the lock head 1000 because the latch 900 is not properly inserted. This provides mechanical feedback to the person on the locking status of the latch 900, solving the problem of the lack of locking status confirmation in existing guardrail locks and improving operational safety.
[0044] The first slide groove 103 is provided with a rolling ball 3000. The ball 3000 is located at one end of the first slide groove 103 near the lock head 1000, and the ball 3000 contacts the locking plate 400 at the end near the lock head 1000. The key rotating plate 2000 is provided with a locking slot 2004 for engaging and matching with the ball 300, so that the locking plate 400 can drive the ball 3000 to engage and match with the locking slot 2004.
[0045] The locking and matching structure of the ball bearing 3000 and the key rotating plate 2000 bayonet 2004 achieves mechanical limiting through the ball bearing 3000 when the locking piece 400 moves. At the same time, the ball bearing 3000 is used to extend the locking piece 400, improving the smoothness of the movement of the locking piece 400 along the first slide groove 103.
[0046] One end of the first slide groove 103 is connected to the receiving groove 102, and the other end of the first slide groove 103 forms a limiting part. The driving member 300 can drive the locking piece 400 to extend and retract along the first slide groove 103 toward the receiving groove 102 through the driving end.
[0047] When the latch 900 is inserted into the socket 101 and the insertion part passes through the positioning hole 501, the detection switch 600 detects the sensing piece 500, and the circuit board 200 controls the drive unit 300 to drive the locking piece 400 to retract and move along the first slide groove 103, so that the locking piece 400 is engaged with the locking piece 400 of the latch 900 through the locking hole 401, thereby forming a locked state.
[0048] The locking piece 400 has a connecting end 402 near the driving member 300. The driving member 300 is connected to the connecting end 402 through the driving end, and the driving end of the driving member 300 provides a continuous elastic force to the locking piece 400 away from the receiving groove 102 through the second elastic member 800. Specifically, the driving member 300 in this embodiment is an electromagnet.
[0049] The second elastic element 800 provides a continuous elastic force to the locking piece 400 away from the receiving groove 102, further ensuring the stability and reliability of the locking piece 400.
[0050] Optionally, in some embodiments, the electronic locking method of the driving element 300 driving the locking piece 400 can be energized to lock and de-energized to lock, or energized to lock and de-energized to lock, thereby adapting to different usage needs and improving applicability and practicality.
[0051] The first slide groove 103 and the second slide groove 104 are arranged in parallel, and the insertion hole 101 is vertically connected to the first slide groove 103 and the second slide groove 104 in sequence.
[0052] Ensure that the sensing plate 500 and the locking plate 400 move synchronously when the latch 900 is inserted, thereby improving the locking response speed and structural stability.
[0053] In the specific implementation process, the locking piece 400 and the sensing piece 500 achieve directional movement through the first slide groove 103 and the second slide groove 104 respectively. The slide groove structure forms a rigid constraint on the movement trajectory of the components, avoiding the movement deviation or jamming caused by long-term use, improving the operation smoothness and mechanical durability of the guardrail lock, and adapting to high-frequency opening and closing scenarios.
[0054] The box 100 has an internal mounting slot 105 for mounting the circuit board 200, and the box 100 has a cable hole 106 that communicates with the mounting slot 105.
[0055] The first elastic member 700 applies a continuous pushing force to the sensing plate 500, causing the positioning hole 501 of the sensing plate 500 and the insertion hole 101 to overlap in an intersecting part. When the latch 900 passes through the insertion end 901 into the insertion hole 101 and enters the positioning hole 501, the latch 900 applies a pressing force relative to the first elastic member 700 to the sensing plate 500, so that the positioning hole 501 and the insertion hole 101 are coaxially arranged.
[0056] Specifically, in this embodiment, the insertion hole 101 is a blind hole, and the insertion end 901 of the latch 900 has an inclined chamfer so that the latch 900 can pass through the positioning hole 501. When the insertion end 901 passes through the positioning hole 501, since the positioning hole 501 and the insertion hole 101 form an overlapping part, the positioning hole 501 and the insertion hole 101 are coaxially arranged, thereby causing the sensing plate 500 to move towards the detection switch 600, so that the insertion of the latch 900 can be stably detected.
[0057] In practical implementation, the sensing element 500 continuously receives a spring force away from the detection switch 600 through the first elastic element 700. Only when the latch 900 is inserted is the first elastic element 700 compressed, causing the sensing element 500 to trigger a detection signal. This design effectively prevents false signal transmission due to mechanical vibration or misoperation, ensuring the accuracy of the latch 900 status feedback, while extending the service life of the detection switch 600.
[0058] The first elastic element 700 and the second elastic element 800 are composed of springs.
[0059] The electronic lock is set to either wired communication mode or wireless communication / battery-powered mode.
[0060] In practical implementation, electronic locks can be used in two modes: wired communication with power and wireless communication with battery power. The wired communication mode is suitable for fixed locations, such as airports or other fixed maintenance access points. The wireless battery mode can be used at temporary maintenance points or temporary guardrail locations to further ensure practicality and flexibility.
[0061] The specific action process in this embodiment is as follows:
[0062] The insertion and locking of the latch 900: The housing 100 and the latch 900 are installed at the opening and closing entrance of the railing. When the latch 900 is inserted into the insertion hole 101, its insertion end 901 passes through the locking hole 401 and the positioning hole 501 in sequence. When the insertion end 901 of the latch 900 enters the positioning hole 501, it presses the sensing plate 500, forcing the sensing plate 500 to move along the second slide groove 104 towards the detection switch 600, thereby triggering the detection switch 600 and moving away from the lock head 1000. This can accurately reflect the actual insertion state of the latch 900, effectively solving the problem of misjudgment caused by the gap in the door body in the electric bolt lock, and the sensing plate 500 passing through the first elastic element 700. The spring force continuously moves away from the detection switch 600, and the detection signal is only triggered when the latch 900 is pushed towards the detection switch 600 during insertion, ensuring the reliability of the latch 900 insertion status feedback. At this time, the circuit board 200 receives the latch 900 insertion signal and can accurately reflect the actual insertion status of the latch 900, effectively solving the misjudgment problem caused by the gap in the door body of the electric bolt lock. At the same time, after the latch 900 is correctly inserted, the key can be used to drive the key rotating plate to rotate to the locked position and can be pulled out from the lock head 1000, thereby providing managers with clear confirmation of the locking status and improving the safety management of the guardrail passage.
[0063] Conversely, when the latch 900 is not fully inserted into the positioning hole 501, the sensor 500 and the latching slot 2001 are still in a latching pairing state, and the key cannot be used to rotate the key rotating plate 2000 to pull it out when locked with a key. This provides personnel with the locked state of the latch 900, realizes the insertion feedback confirmation of the double latch 900, and improves the security and effectiveness of the guardrail lock in controlling entry and exit.
[0064] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.
Claims
1. A double-locking guardrail lock, comprising a housing and a circuit board disposed within the housing, wherein the housing has an insertion hole for inserting a latch, characterized in that: The box body is equipped with a driving component installed through a receiving groove. The box body has a first sliding groove communicating with the receiving groove. The middle part of the first sliding groove is connected to the insertion hole. A slidable locking piece is provided in the first sliding groove. The locking piece has a locking hole. The driving end of the driving component extends into the first sliding groove and is connected to one end of the locking piece, so that the driving component can drive the locking piece to move along the first sliding groove to lock or unlock. The box body has a sensing piece provided through a second sliding groove. The sensing piece has a positioning hole communicating with the insertion hole. The sensing piece can move along the second sliding groove toward the circuit board. The circuit board is electrically connected to a detection switch for detecting the insertion or removal of the latch. The box body provides a spring force to the sensing piece that continuously moves away from the detection switch through a first elastic element. The box body is equipped with a lock head. A key rotating plate is connected to the lock head. The key rotating plate has a locking slot for matching the sensing piece. The lock head can drive the key rotating plate to rotate through the lock cylinder. The latch has an insertion end and a locking part. When the insertion end passes through the locking hole and the positioning hole in sequence along the insertion hole, the sensing plate is pressed by the latch and moves toward the detection switch. The circuit board receives the latch insertion signal, and the driving component drives the locking plate to move. It locks itself by locking the locking hole and the locking part. The lock head can drive the key turn plate to rotate smoothly. When the end of the insertion end is not inserted into the positioning hole, the first elastic element provides a continuous elastic force to the sensing plate that approaches the lock head, causing one end of the sensing plate to engage and match with the locking slot. The circuit board does not receive the latch insertion signal, and the key rotation plate and the sensing plate form a locking lock.
2. The guardrail lock with double locking according to claim 1, characterized in that: The interior of the housing has a connecting groove for installing the lock cylinder. The lock cylinders are paired and installed in the connecting groove, with one end of the lock cylinder protruding outside the housing. The key rotating plate is installed on the lock cylinder. A limiting protrusion is formed in the connecting groove. A first limiting part and a second limiting part are formed on the key rotating plate. The lock cylinder can drive the key rotating plate to perform locking or unlocking actions. When the latch passes through the locking hole and the positioning hole in sequence, the key rotating plate rotates to make the first limiting part contact the limiting protrusion. When the latch only passes through the locking hole or is pulled out, the sensing plate is subjected to the continuous elastic force of the first elastic element, and the second limiting part of the key rotating plate contacts the limiting protrusion, so that the sensing plate is engaged with the locking slot.
3. A guardrail lock with double locking as described in claim 2, characterized in that: The first slide groove is provided with a rolling ball. The ball is located at the end of the first slide groove near the lock head and contacts the end of the locking plate near the lock head. The key rotating plate is provided with a slot for engaging and matching the ball, so that the locking plate can drive the ball to engage and match with the slot.
4. A guardrail lock with double locking as described in claim 1, characterized in that: One end of the first slide groove is connected to the receiving groove, and the other end of the first slide groove forms a limiting part. The driving member can drive the locking piece to extend and retract along the first slide groove toward the receiving groove through the driving end.
5. A guardrail lock with double locking as described in claim 1, characterized in that: The locking piece has a connecting end near the driving member. The driving member is connected to the connecting end through the driving end, and the driving end of the driving member is used by a second elastic member to provide a continuous elastic force to the locking piece away from the receiving groove.
6. A guardrail lock with double locking as described in claim 1, characterized in that: The first slide and the second slide are arranged in parallel, and the insertion hole is vertically connected to the first slide and the second slide in sequence.
7. A guardrail lock with double locking according to any one of claims 1-6, characterized in that: The box body has an internal mounting slot for mounting a circuit board, and a cable routing hole communicating with the mounting slot is provided on the box body.
8. A guardrail lock with double locking according to any one of claims 1-6, characterized in that: The first elastic element applies a continuous pushing force to the sensing sheet, causing the positioning hole of the sensing sheet and the insertion hole to overlap in an interlaced manner. When the latch passes through the insertion end into the insertion hole and enters the positioning hole, the latch applies a squeezing force relative to the first elastic element to the sensing sheet, so that the positioning hole and the insertion hole are coaxially arranged.
9. A guardrail lock with double locking according to any one of claims 1-6, characterized in that: The first elastic element and the second elastic element are composed of springs.