Door lock with high reliability

Abstract

The utility model belongs to the technical field of door locks, and discloses a high-reliability door lock which comprises a lock rod, a lock tongue, a first spring, a lead, an electric limiting mechanism and a limiting switch. The spring bolt is provided with a lock groove for clamping the lock rod, the spring bolt is rotationally connected with the mandrel, one end of the spring bolt is connected with the lead, the lead is located in the first spring, and one end of the first spring is fixed; when the limiting rod of the electric limiting mechanism is located at the stretching-out position, rotation of the spring bolt relative to the mandrel is limited, and when the limiting rod of the electric limiting mechanism is located at the retracting position, limitation on the spring bolt is relieved; when the lock rod is clamped into the spring bolt, the detection head of the limiting switch is triggered by the lock rod. The safety door has a double-locking function, in the vertical operation process of the elevator, locking of the safety door can be effectively guaranteed, good safety guarantee is provided for workers to go up and down the elevator, in addition, after the elevator reaches a designated floor, the electric limiting mechanism is unlocked, and the workers inside and outside can conveniently relieve limitation of the lock tongue to the lock rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of door locks, and in particular relates to a door lock with high reliability. Background Art

[0002] Door locks are devices used to lock doors, and different scenarios also have different requirements for door locks.

[0003] In a construction site, workers generally reach different floors by elevator, wherein the closing and opening functions of the elevator cabin are realized by the door lock of the safety door.

[0004] Therefore, whether the door lock is reliable enough is related to the safety of the staff riding the elevator. If the door lock cannot effectively close the cabin, the staff may be at risk of falling;

[0005] In addition, how to conveniently open and close the door lock from both inside and outside to facilitate staff entering and exiting the elevator is also a problem that needs to be solved urgently. Utility Model Content

[0006] In view of the problems raised by the above background technology, the purpose of the present utility model is to provide a door lock with high reliability.

[0007] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0008] A door lock with high reliability, comprising a lock rod, a lock tongue, a first spring, a lead wire, an electric limit mechanism, and a limit switch;

[0009] The lock tongue is provided with a lock groove for clamping the lock rod, the lock tongue is rotatably connected with respect to the core shaft, one end of the lock tongue is connected with a lead wire, the lead wire is located inside the first spring, and one end of the first spring is fixed;

[0010] When the limit rod of the electric limit mechanism is in the extended position, the lock tongue is restricted from rotating about the spindle, and when the limit rod of the electric limit mechanism is in the retracted position, the restriction on the lock tongue is released;

[0011] When the locking rod is clamped into the locking tongue, the detection head of the limit switch is triggered by the locking rod.

[0012] It is further defined that the electric limit mechanism includes an electromagnet, a second spring, and a limit rod acted upon by the magnetic force of the electromagnet, the second spring being sleeved on the outer ring of the limit rod, the radial dimension of the end of the limit rod being greater than the outer diameter of the second spring, and when the electromagnet is energized, the limit rod is in a retracted position, and when the electromagnet is de-energized, the limit rod is in an extended position. With such a structural design, when the electromagnet is energized, a magnetic force for adsorbing the limit rod can be generated, and under the action of the magnetic force, the limit rod moves toward the direction of the electromagnet and compresses the second spring, at which time the limit rod releases the restriction on the lock tongue, and when the electromagnet is de-energized, the magnetic force disappears, and under the action of the resetting of the second spring, the limit rod is pushed out again, and the restriction on the lock tongue is re-formed.

[0013] It is further defined that the limit switch is a rocker-type limit switch. With such a structural design, the rocker-type limit switch has high reliability, and the detection head is rod-shaped with a large length distribution range, which is convenient for triggering the locking rod.

[0014] It is further defined that the locking tongue is provided with a first through hole for cooperating with the core shaft, and the locking tongue is provided with a second through hole for binding the lead wire. With such a structural design, the first through hole cooperates with the core shaft, and the second through hole is used for binding the lead wire.

[0015] It is further defined that it also includes a first carrier plate fixed on the movable door panel and a second carrier plate fixed on the door frame, the locking rod and the first carrier plate are fixedly connected, and the second carrier plate provides an installation position for the lock tongue, the first spring, the lead wire, the electric limit mechanism, the limit switch, and the core shaft. With such a structural design, the first carrier plate is fixed on the movable door panel and moves with the first carrier plate, thereby driving the locking rod to move together, and the second carrier plate provides an installation position for the remaining components.

[0016] The beneficial effects of the utility model: the utility model has a double locking function, which can effectively ensure the locking of the safety door during the up and down movement of the elevator, providing good safety protection for the staff going up and down the elevator. In addition, after the elevator reaches the designated floor, the electric limit mechanism is unlocked, and the staff inside and outside can easily remove the restriction of the lock tongue on the lock rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a schematic structural diagram of a door lock embodiment with high reliability of the utility model;

[0019] Figure 2 This is a structural schematic diagram of a door lock embodiment with high reliability of the utility model, in which a lock rod is fixed on a first carrier plate;

[0020] Figure 3This is a schematic structural diagram of a highly reliable door lock embodiment of the utility model without presenting the lock rod and the first carrier plate;

[0021] Figure 4 A first structural schematic diagram of an embodiment of a door lock with high reliability of the utility model is exposed, showing an electric limit mechanism and an electromagnet;

[0022] Figure 5 A second structural schematic diagram of an embodiment of a door lock with high reliability of the utility model is exposed, showing an electric limit mechanism and an electromagnet;

[0023] Figure 6 It is a structural schematic diagram of an electric limit mechanism in a door lock embodiment with high reliability of the utility model;

[0024] Figure 7 This is a structural schematic diagram of a lock tongue in a door lock embodiment with high reliability of the utility model;

[0025] The main component symbols are described as follows:

[0026] 11. Locking rod; 12. First carrier plate;

[0027] 21. Second carrier plate; 22. Limit switch; 221. Detection head; 23. Electric limit mechanism; Electromagnet 231; 232. Limit rod; 233. Second spring; 24. Lock tongue; 241. First through hole; 242. Second through hole; 243. Lock slot; 25. First spring; 26. Lead wire. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1-7 As shown, a door lock with high reliability of the utility model comprises a lock rod 11, a lock tongue 24, a first spring 25, a lead wire 26, an electric limit mechanism 23, and a limit switch 22;

[0030] The lock tongue 24 is provided with a lock groove 243 for clamping the lock rod 11, and the lock tongue 24 is rotatably connected with the core shaft, and one end of the lock tongue 24 is connected with the lead wire 26, and the lead wire 26 is located inside the first spring 25, and one end of the first spring 25 is fixed;

[0031] When the limiting rod 232 of the electric limiting mechanism 23 is in the extended position, the locking tongue 24 is restricted from rotating about the core shaft. When the limiting rod 232 of the electric limiting mechanism 23 is in the retracted position, the restriction on the locking tongue 24 is released.

[0032] When the locking rod 11 is engaged with the locking tongue 24 , the detection head 221 of the limit switch 22 is triggered by the locking rod 11 .

[0033] In this embodiment:

[0034] The electric limit mechanism 23 and the controller for controlling the elevator to move up and down are interrelated. When the elevator runs to the designated floor, the electric limit mechanism 23 obtains electric energy under the action of the controller, so that the limit rod 232 releases the restriction on the lock tongue 24. If the elevator does not reach the designated floor, the electric limit mechanism 23 is always in a power-off state, and the limit rod 232 is in an extended position, limiting the rotation of the lock tongue 24 about the spindle, thereby maintaining the relative position of the lock tongue 24 and the lock rod 11, and the lock rod 11 cannot be separated from the lock groove 243, thereby achieving forced locking and ensuring the safety of the staff during the up and down operation of the elevator;

[0035] In addition, in order to detect whether the lock rod 11 is correctly inserted into the lock groove 243 of the lock tongue 24, a limit switch 22 is provided. When the lock rod 11 triggers the detection head 221, it indicates that the lock rod 11 is inserted into the lock tongue 24;

[0036] In addition, when the lock rod 11 is inserted into the lock tongue 24, the two themselves also form a limit, and when there is no external force acting on the lock tongue 24, the lock tongue 24 itself can also prevent the lock rod 11 from being separated;

[0037] In terms of unlocking, when the elevator reaches the designated floor, if the staff unlocks from the inside of the elevator, they only need to pull the lead wire 26 to rotate the lock tongue 24 about the core shaft to change the direction of the lock slot 243. At this time, the staff pushes the safety door to drive the lock rod 11 to disengage from the lock slot 243, and the safety door can be opened freely. After the staff releases the lead wire 26, the lock tongue 24 rotates under the elastic force of the first spring 25; if the staff unlocks from the outside of the elevator and wants to enter the interior of the elevator, they manually move the lock tongue 24 to rotate the lock tongue 24, change the direction of the lock slot 243, and pull the safety door to disengage the lock rod 11 from the lock slot 243;

[0038] When entering the elevator and locking is required, the locking rod 11 hits the locking tongue 24, causing the locking tongue 24 to rotate about the core shaft, and the locking rod 11 slides into the locking groove 243 of the locking tongue 24 to achieve locking;

[0039] To sum up, the utility model has a double locking function, which can effectively ensure the locking of the safety door during the up and down movement of the elevator, providing good safety protection for the staff going up and down the elevator. In addition, after the elevator reaches the designated floor, the electric limit mechanism 23 is unlocked, and the staff inside and outside can easily remove the restriction of the lock tongue 24 on the lock rod 11.

[0040] Preferably, the electric limit mechanism 23 includes an electromagnet 231, a second spring 233, and a limit rod 232 acted upon by the magnetic force of the electromagnet 231. The second spring 233 is sleeved on the outer ring of the limit rod 232. The radial dimension of the end of the limit rod 232 is greater than the outer diameter of the second spring 233. When the electromagnet 231 is energized, the limit rod 232 is in a retracted position. When the electromagnet 231 is de-energized, the limit rod 232 is in an extended position. With such a structural design, when the electromagnet 231 is energized, a magnetic force for adsorbing the limit rod 232 can be generated. Under the action of the magnetic force, the limit rod 232 moves toward the direction of the electromagnet 231 and compresses the second spring 233. At this time, the limit rod 232 releases the restriction on the lock tongue 24. When the electromagnet 231 is de-energized, the magnetic force disappears. Under the action of the resetting of the second spring 233, the limit rod 232 is pushed out again, and the restriction on the lock tongue 24 is re-formed. In fact, other structural shapes of the electric limiting mechanism 23 may also be considered according to specific circumstances.

[0041] Preferably, the limit switch 22 is a rocker-type limit switch. With such a structural design, the rocker-type limit switch has high reliability, and the detection head 221 is rod-shaped with a large length distribution range, which is convenient for triggering the locking rod 11. In fact, other types of limit switches 22 can also be considered according to specific circumstances.

[0042] Preferably, the lock tongue 24 is provided with a first through hole 241 for cooperating with the mandrel, and the lock tongue 24 is provided with a second through hole 242 for binding the lead wire 26. In this structural design, the first through hole 241 cooperates with the mandrel, and the second through hole 242 is used to bind the lead wire 26. In fact, other structural shapes of the lock tongue 24 can also be considered according to specific circumstances.

[0043] Preferably, it also includes a first carrier plate 12 fixed on the movable door panel and a second carrier plate 21 fixed on the door frame, the lock rod 11 and the first carrier plate 12 are fixedly connected, and the second carrier plate 21 provides an installation position for the lock tongue 24, the first spring 25, the lead wire 26, the electric limit mechanism 23, the limit switch 22, and the spindle. With this structural design, the first carrier plate 12 is fixed on the movable door panel and moves with the first carrier plate 12, thereby driving the lock rod 11 to move together, and the second carrier plate 21 provides an installation position for the remaining parts. In fact, other structural shapes for installation and fixing can also be considered according to specific circumstances.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A door lock with high reliability, characterized by: It comprises a locking rod (11), a locking tongue (24), a first spring (25), a lead wire (26), an electric limit mechanism (23), and a limit switch (22); The locking tongue (24) is provided with a locking groove (243) for clamping the locking rod (11), the locking tongue (24) is rotatably connected with respect to the core shaft, one end of the locking tongue (24) is connected with a lead wire (26), the lead wire (26) is located inside the first spring (25), and one end of the first spring (25) is fixed; When the limiting rod (232) of the electric limiting mechanism (23) is in the extended position, the locking tongue (24) is restricted from rotating about the core shaft; when the limiting rod (232) of the electric limiting mechanism (23) is in the retracted position, the restriction on the locking tongue (24) is released; When the locking rod (11) is locked into the locking tongue (24), the detection head (221) of the limit switch (22) is triggered by the locking rod (11).

2. A door lock with high reliability according to claim 1, characterized in that: The electric limiting mechanism (23) comprises an electromagnet (231), a second spring (233), and a limiting rod (232) acted upon by the magnetic force of the electromagnet (231); the second spring (233) is sleeved on the outer ring of the limiting rod (232); the radial dimension of the end of the limiting rod (232) is greater than the outer diameter of the second spring (233); when the electromagnet (231) is energized, the limiting rod (232) is in a retracted position; when the electromagnet (231) is de-energized, the limiting rod (232) is in an extended position.

3. A door lock with high reliability according to claim 1, characterized in that: The limit switch (22) is a rocker-type limit switch.

4. A door lock with high reliability according to claim 1, characterized in that: The locking tongue (24) is provided with a first through hole (241) for cooperating with the core shaft, and the locking tongue (24) is provided with a second through hole (242) for binding the lead wire (26).

5. A door lock with high reliability according to any one of claims 1 to 4, characterized in that: It also comprises a first carrier plate (12) fixed on the movable door plate and a second carrier plate (21) fixed on the door frame, wherein the lock rod (11) and the first carrier plate (12) are fixedly connected, and the second carrier plate (21) provides an installation position for a lock tongue (24), a first spring (25), a lead wire (26), an electric limit mechanism (23), a limit switch (22), and a core shaft.

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