CN215803868U - Three-lock two-open locking mechanism and locking device thereof - Google Patents

Abstract

The utility model discloses a locking mechanism with three locks and two unlocks and a locking device thereof. The locking mechanism realizes the locking of the locking connecting piece through the clamping position of the two sliding stop blocks. The first sliding block is connected with the two locking devices, and the second sliding block is connected with one locking device. The locking device unlocks the locking connecting piece by controlling the relative lateral movement stroke between the first sliding stop block and the second sliding stop block, so that any two locking devices in the three locking devices can be unlocked after being unlocked by the locking devices; when only one locking device is unlocked, the lateral movement stroke of the driving connected sliding stop block can not separate the two sliding stop blocks, so that the locking mechanism is kept in a locking state.

Description

Three-lock two-open locking mechanism and locking device thereof

Technical Field

The utility model relates to a locking device, in particular to a locking device with multiple locks and multiple unlocks.

Background

The standard of the vault requires that the vault door adopts at least a three-opening two-structure, namely, any two locks in the three locks are opened, and the vault door can be opened, so that the fault tolerance problem of the vault door lock can be solved. That is, with this structure, it is also possible to open the vault door in the event of damage to one of the locks. Thereby ensuring the security of the safe.

CN 110939323 a discloses a three-lock two-open lock capable of realizing the three-open two-open structure required by the above vault door. However, the technical scheme has a defect that: when one of the locks is opened, the handle is rotated to retract the lock bolt into a half, and the locking length of the lock bolt does not meet the standard of a safe deposit.

Disclosure of Invention

The problems to be solved by the utility model are as follows: a three-lock two-open structure is designed, a vault door can be opened as long as any two locks are opened, and the handle cannot rotate under the condition that only one lock is opened.

In order to solve the problems, the utility model adopts the following scheme:

the locking mechanism comprises three locking devices, a first locking sliding plate, a first lever swinging plate, a first sliding stop block, a second sliding stop block and a locking connecting piece, wherein the three locking devices are arranged on a mounting plate; when the locking mechanism is in a locking state, the first sliding stop block is clamped between the second sliding stop block and the locking connecting piece; the three locking devices are respectively a first locking device, a second locking device and a third locking device; the first sliding block is arranged on the mounting plate through the first locking sliding plate, so that the first sliding block can swing laterally and can also move horizontally; when the first sliding block swings laterally, the first sliding block can be separated from the second sliding block, so that the locking state of the locking mechanism is released; the first sliding stop block is connected with the first locking device and the second locking device through a first lever swinging plate bridge type lever, so that the first sliding stop block swings downwards under the driving of the first locking device and/or the second locking device; the second sliding stop block is connected with the third locking device, so that the second sliding stop block can be driven by the third locking device to translate in the lateral direction; when the three locking devices are in a locking state: when one of the first locking device and the second locking device is unlocked, the lateral swing stroke of the first sliding block driven by the unlocked locking device is insufficient to enable the first sliding block and the second sliding block to be unlocked; when the third locking device is unlocked, the lateral translation stroke of the second sliding stop block is not enough to release the position of the first sliding stop block and the second sliding stop block; when the first locking device and the second locking device are unlocked, the first sliding stop block swings laterally to separate the first sliding stop block from the second sliding stop block to release the clamping position, so that the locking device is unlocked; when one of the first locking device and the second locking device is unlocked and the third locking device is unlocked, the lateral swing of the first sliding block and the lateral translation of the second sliding block enable the first sliding block and the second sliding block to be separated to release the clamping, and therefore the locking device is unlocked.

Further, according to the three-lock two-open locking mechanism, one end of the first locking sliding plate is provided with a kidney-shaped hole, and the first locking sliding plate is arranged on the mounting plate through the first kidney-shaped hole sliding limiting mechanism, so that the first locking sliding plate can translate and swing relative to the mounting plate; the other end of the first locking sliding plate is fixedly connected with a first sliding stop block and is movably connected with a first lever swinging plate; two ends of the first lever swing plate are respectively connected with the first locking device and the second locking device through a first swing connecting mechanism and a second swing connecting mechanism; the first locking device and the second locking device are positioned on the same side of the first lever swinging plate; the middle of the first lever swinging plate is provided with a waist-shaped hole, and the first lever swinging plate is movably connected with the first locking sliding plate and the first sliding stop block through a second waist-shaped hole sliding limiting mechanism.

Further, according to the locking mechanism with the three locks and the two locks, when the first locking device and the second locking device are both in the locking state, the first locking sliding plate is parallel to the first lever swinging plate, the telescopic directions of the first locking device and the second locking device are perpendicular to the first lever swinging plate, and the sliding and translation direction of the second sliding stop block is perpendicular to the first lever swinging plate; the third locking device is arranged opposite to the first locking device and the second locking device.

Furthermore, the locking mechanism with the three locks and the two locks is also provided with a return spring connected with the first locking sliding plate; the return spring is used to either pull or push the first lock slide to the position where the locking mechanism is in the locked state.

Further, the locking mechanism of the three-lock two-open structure further comprises a second locking sliding plate and a second lever swinging plate; the second lock slide is disposed on the mounting plate via a slide limiting mechanism such that the second lock slide is translationally slidable relative to the mounting plate; one end of the second locking sliding plate is fixedly connected with the second sliding stop block; one end of the second lever swinging plate is arranged on the mounting plate through a swinging connecting mechanism, and the other end of the second lever swinging plate is connected with the third locking device through a third swinging connecting mechanism; the middle of the second lever swinging plate is connected with the second locking sliding plate through a swinging connecting mechanism.

Further, according to the locking mechanism of the three-lock two-open structure, the first locking device, the second locking device and the third locking device have the same telescopic stroke D; the second locking sliding plate is connected to the middle point of the second lever swinging plate; when the first locking device and the second locking device are in a locking state, the first sliding stop block is connected to the midpoint of the first lever swing plate; when the first locking device, the second locking device and the third locking device are in a locking state, the clamping width W between the first sliding stop block and the second sliding stop block satisfies the following conditions: d/< W < D.

Further, the locking mechanism with three locks and two unlocks further comprises a fixed stop block arranged on the mounting plate, and when the locking mechanism is in a locking state, the second sliding stop block is clamped between the first sliding stop block and the fixed stop block.

Further, according to the locking mechanism of the three-lock two-open structure, the locking connecting piece is a swinging piece which can rotate around the axial direction vertical to the mounting plate and comprises a first cambered surface and a second cambered surface; the first cambered surface and the second cambered surface take the axial direction as the center of a circle and have different radiuses; the two ends of the first cambered surface and the second cambered surface are respectively connected through a first step surface and a second step surface; when the first locking device, the second locking device and the third locking device are in a locking state, the first step surface is clamped on the first sliding stop block.

Furthermore, the locking mechanism for locking and unlocking the door and the door further comprises a limiting block; when the first locking device, the second locking device and the third locking device are in a locking state, the second step surface is abutted against the limiting block.

The utility model relates to a locking device with three locks and two unlocks, which comprises a box body, a lock shaft, a lock bolt plate and an installation plate, wherein the lock shaft, the lock bolt plate and the installation plate are arranged on the box body; the mounting plate is arranged in the box body and divides the box body into a first cavity and a second cavity; the lock shaft vertically penetrates through the mounting plate; the lock bolt plate is arranged in the first cavity and is connected with the lock shaft through a shaft bolt transmission mechanism, so that when the lock shaft is rotated, the lock bolt plate can stretch and retract; a locking mechanism is arranged in the second cavity; the locking mechanism is the locking mechanism with three locks and two unlocks; the locking connecting piece is connected with the lock shaft and the lock bolt plate; when the first locking device, the second locking device and the third locking device are in a locking state, the locking connecting piece is clamped, and the locking shaft and the locking bolt plate are clamped.

The utility model has the following technical effects: in the three-lock two-open locking device, the locking device can be opened only after any two locks are opened, and the locking device cannot be opened under the condition that only one lock is opened.

Drawings

Fig. 1 is a schematic view of the overall structure of an embodiment of the lock mechanism of the present invention.

Fig. 2 is a schematic view of the overall structure of an embodiment of the locking device of the present invention.

Fig. 3 is a schematic cross-sectional view of an embodiment of the locking device of the present invention.

Fig. 4 is a schematic structural view of the hidden lever swing plate in fig. 1.

Fig. 5 is a schematic front view of fig. 4 with the locking sled hidden.

Fig. 6 is an enlarged front view of the portion of the lever swing plate and the locking slide plate of fig. 1.

Fig. 7, 8 and 9 are views showing the relationship between the slide stopper and the lock link.

Fig. 10 is a perspective view of the locking connection.

In each of the above-described figures,

1 is a box body, 101 is a first cavity, 102 is a second cavity, 11 is a front panel, 12 is a back panel, 13 is a mounting plate, and 14 is a mounting plate fixing piece;

20 is a lock shaft, 200 is a shaft bolt transmission mechanism, 21 is a first lock bolt plate, and 22 is a second lock bolt plate;

300 is a lock mechanism, 31 is a lock device, 311 is a first lock device, 312 is a second lock device, 313 is a third lock device, 32 is a lock slide plate, 321 is a first lock slide plate, 322 is a second lock slide plate, 329 is a return spring, 33 is a lever swing plate, 331 is a first lever swing plate, 332 is a second lever swing plate, 34 is a slide stopper, 341 is a first slide stopper, 342 is a second slide stopper, 351 is a fixed stopper, 352 is a stopper, 36 is a lock connecting member, 361 is a first arc surface, 362 is a second arc surface, 363 is a first step surface, 364 is a second step surface, 365 is an elastic top block mounting hole, 369 is a lock shaft connecting hole, 37 is a lock driving plate, 371 is a first lock driving plate, 372 is a second lock driving plate, 373 is a third lock driving plate, 38 is a swing connecting mechanism, 381 is a first swing connecting mechanism, 382 is a second swing connecting mechanism, 383 is a third swing link, 384 is a fourth swing link, 385 is a fifth swing link, 39 is a kidney-shaped hole slide restricting mechanism, 391 is a first kidney-shaped hole slide restricting mechanism, and 392 is a second kidney-shaped hole slide restricting mechanism;

arrow R is the opening rotation direction of the locking connection.

Arrow F indicates the sliding direction of the first slide stop.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 2 and 3, a three-lock two-open locking device, which is generally used to be installed on a vault door, includes a box body 1, and a lock shaft 20, a plurality of latch plates, and an installation plate 13, which are installed on the box body 1. The box body 1 is a square structure, and is a hollow hexahedron enclosed by four surrounding plates, a front panel 11 and a back panel 12 which are arranged in front and back. The mounting plate 13 is used for mounting internal accessories, is arranged in the box body 1 and is fixed with the box body 1 through a clamping and mounting plate fixing piece 14 with reference to fig. 1 and 4. The mounting panel 13 is the platelike body, parallels with front panel and backplate 12, has divided into two cavitys with 1 inner space of box body: a first cavity 101 and a second cavity 102. The latch shaft 20 is perpendicular to the front panel 11, back panel 12 and mounting plate 13 and extends perpendicularly through the mounting plate 13 for attachment to a door handle grip. The bolt plate is a plate-shaped body, and has four blocks which are respectively: two first latch plates 21 and two second latch plates 22. The two first latch plates 21 and the two second latch plates 22 are respectively arranged oppositely and extend out of the box body 1 from the four side walls of the box body 1. The latch plates are connectors, typically two first latch plates 21 for connecting to the world bar of the vault door and two second latch plates 22 for connecting to the door latch of the vault door. The latch plate and latch shaft 20 are connected by a shaft latch mechanism 200. Therefore, when the lock shaft 20 is rotated by the handle of the door handle connected with the lock shaft, the lock bolt plates are driven to synchronously extend and retract through the transmission of the shaft bolt transmission mechanism 200, and then the world pole of the vault door connected with the lock bolt plates and the bolt of the vault door are driven to move, so that the locking and unlocking operations of the vault door are realized. A latch plate and shaft-latch drive mechanism 200 is disposed within the first cavity 101. A locking mechanism 300 is disposed within the second chamber 102. The shaft bolt transmission mechanism 200 is a transmission mechanism that converts the rotation of the lock shaft 20 into the linear motion of the lock bolt plate, and the specific structure and the implementation are various and familiar to those skilled in the art and are not in the scope of the present invention, and the detailed description is not necessary in this specification.

The locking mechanism 300 is a three-lock two-open locking mechanism for locking the movement of the latch plate, and includes three locking devices 31, referring to fig. 1, 4, 5 and 6. There are two states of the locking device and locking mechanism 300: the locked state and the unlocked state, and likewise, the capture device 31 has two states: a locked state and an unlocked state. The capture device 31 is an electronic lock in this embodiment, and those skilled in the art will understand that the capture device 31 may also be implemented by a permanent magnet mechanism or other electrically driven mechanism. The meaning of the three locks and two unlocks referred by the utility model is that: when all the three locking devices 31 are in the locked state, the locking mechanism 300 is locked and in the locked state, so that the latch plate is limited and cannot move, and the latch shaft 20 cannot be rotated to drive the latch plate to stretch and retract; when any two of the three locking devices 31 are in the unlocked state, the locking mechanism 300 is unlocked and is in the unlocked state, so that the latch plate can move, and the lock shaft 20 can be rotated to drive the latch plate to stretch and retract; when only one of the three latches 31 is in the unlocked state, the locking mechanism 300 remains in the locked state. The catch device 31 has a telescopic stroke when the catch device 31 is switched between the locked state and the unlocked state.

The overall design concept of the three-lock two-open locking mechanism is as follows:

referring to fig. 7, 8 and 9, two slide stops 34 and locking connections 36 are introduced. The two slide stoppers 34 are a first slide stopper 341 and a second slide stopper 342, respectively. The three locking devices 31 are respectively defined as a first locking device 311, a second locking device 312 and a third locking device 313. The first sliding block 341 is connected to the first locking device 311 and the second locking device 312, and the second sliding block 342 is connected to the third locking device 313. The lock connector 36 is used to fixedly connect the lock shaft 20 and the keeper plate. When the locking device is unlocked, the locking link 36 moves in the opening direction. When the locking mechanism is in the locked state, referring to fig. 7, the first sliding stopper 341 is caught between the second sliding stopper 342 and the locking link 36, so that the first sliding stopper 341 and the second sliding stopper 342 are stopped on the moving path of the locking link 36 in the opening direction, thereby allowing the movement of the locking link 36 to be locked, and thus allowing the lock shaft 20 and the latch plate to be locked. The opening direction of the locking link 36 is indicated by arrow R. When the first locking device 311, the second locking device 312 and the third locking device 313 are all in the locked state, the first sliding block 341 and the second sliding block 342 have a blocking width W therebetween. When both the first and second locking devices 311 and 312 are unlocked, referring to fig. 8, the first sliding stopper 341 is driven by the first and second locking devices 311 and 312 to have a translational stroke D, D > W in the lateral direction, so that the first and second sliding stoppers 341 and 342 are separated by being displaced, the movement of the lock link 36 in the opening direction is not restricted by the first and second sliding stoppers 341 and 342, and the lock mechanism and the locking device are unlocked. When only one of the first and second locking devices 311 and 312 is unlocked, referring to fig. 9, the lateral translation stroke of the first sliding stopper 341 is D/2, D/2< W, the first and second sliding stoppers 341 and 342 are still engaged, and the locking link 36 is maintained in the locked state. When the third locking device 313 is unlocked, the third locking device 313 drives the second sliding stopper 342 to have a lateral translation stroke of D/2, D/2< W, the first sliding stopper 341 and the second sliding stopper 342 are still engaged, and the locking connector 36 is maintained in the locked state. When only one of the first and second locking devices 311 and 312 is unlocked and the third locking device 313 is also unlocked, the lateral translational travel of the first sliding stopper 341 is D/2, the lateral translational travel of the second sliding stopper 342 is D/2, and the lateral translational directions of the first and second sliding stoppers 341 and 342 are opposite, whereby the lateral translational travel of the second sliding stopper 342 with respect to the first sliding stopper 341 is D, D > W, so that the first and second sliding stoppers 341 and 342 are staggered and separated, so that the movement of the locking link 36 in the opening direction is not restricted by the first and second sliding stoppers 341 and 342. Thereby realizing the function of three locks and two unlocks.

Referring to fig. 9, when the first sliding stopper 341 is laterally translated by a stroke D/2, the first sliding stopper 341 still stops on the moving path of the locking link 36 in the opening direction. In this case, when the second sliding block 342 is laterally translated by a distance D/2, the locking connector 36 will necessarily push the first sliding block 341 to translate in the direction indicated by the arrow F when moving in the opening direction. That is, the first slide stopper 341 needs to be movable in two mutually perpendicular directions. For this purpose, a first locking slide 321 is introduced in the present embodiment, fig. 1, 4, 5 and 6. One end of the first locking sliding plate 321 is provided with a kidney-shaped hole, and the first locking sliding plate 321 is arranged on the mounting plate 13 through a first kidney-shaped hole sliding limiting mechanism 391, so that the first locking sliding plate 321 can translate and swing relative to the mounting plate 13; the other end of the first locking sliding plate 321 is a free end and is fixedly connected to the first sliding block 341. The first slotted hole sliding limiting mechanism 391 realizes the sliding limitation of the first locking sliding plate 321 through the slotted hole on the first locking sliding plate 321 and the clamping column arranged on the mounting plate 13. The structure of the first slot-shaped hole sliding limiting mechanism 391 is familiar to those skilled in the art, and the description thereof is omitted. The connection of the first sliding block 341 through the first locking sliding plate 321 enables the first sliding block 341 to swing around the position-locking column of the first slotted hole sliding limiting mechanism 391 and to translate a distance under the limit of the slotted hole. Therefore, the lateral translation of the first sliding block 341 is the swing of the first sliding block 341.

The first sliding block 341 connected to the first and second locking devices 311 and 312 can move in a lateral direction with a distance D when both the first and second locking devices 311 and 312 are unlocked, and the first and second locking devices 311 and 312 can move in a lateral direction with a distance D/2 when only one of the first and second locking devices 311 and 312 is unlocked. In this embodiment, a first lever swing plate 331 is introduced. The first sliding block 341 is bridge-type lever connected to the first locking device 311 and the second locking device 312 via the first lever swing plate 331. The first and second position locking devices 311 and 312 have the same telescopic stroke, and the telescopic stroke is D. The first sliding block 341 is connected to the middle point of the first lever swing plate 331, so that when only one of the first locking device 311 and the second locking device 312 is unlocked, the lateral translation stroke of the first sliding block 341 is half of the extension stroke of the first locking device 311 and the second locking device 312, that is, D/2. The bridge lever connection of the first lever swing plate 331 is as follows:

the two ends of the first lever swing plate 331 are respectively connected to the locking driving plate 37 through the swing connecting mechanism 38, and are respectively connected to the first locking device 311 and the second locking device 312 through the locking driving plate 37. The swing link mechanisms 38 at both ends are a first swing link mechanism 381 and a second swing link mechanism 382, respectively. The capture driving plates 37 connected with the first capture device 311 and the second capture device 312 are a first capture driving plate 371 and a second capture driving plate 372, respectively. That is, one end of the first lever swing plate 331 is connected to the first locking driving plate 371 and thus the first locking device 311 through the first swing link mechanism 381; the other end of the first lever swing plate 331 is connected to the second capture driving plate 372 and thus to the second capture device 312 via a second swing connection 382. The swing connecting mechanism 38, which in this embodiment is composed of a locking post and a swing shaft hole, is familiar to those skilled in the art and will not be described in detail. Since both ends of the first lever swing plate 331 are connected to the locking device through the swing link mechanism 38, when the first locking device 311 is maintained in the locked state or the unlocked state and the second locking device 312 is switched between the locked state and the unlocked state, the first lever swing plate 331 can swing around the first swing link mechanism 381; when the second capture device 312 is held in the locked state or the unlocked state and the first capture device 311 is switched between the locked state and the unlocked state, the first lever swing plate 331 can swing about the second swing link 382. The first locking device 311 and the second locking device 312 are located on the same side of the first lever swing plate 331, and the extending and retracting direction of the first locking driving plate 371 and the extending and retracting direction of the second locking driving plate 372 are parallel and perpendicular to the first lever swing plate 331. The vertical direction here means that when both the first locking device 311 and the second locking device 312 are in the locked state or the unlocked state, the extending and contracting direction of the first locking drive plate 371 and the extending and contracting direction of the second locking drive plate 372 are perpendicular to the line connecting the axes of the first swing link 381 and the second swing link 382.

The first sliding block 341 is movably connected with the first lever swing plate 331. Specifically, a waist-shaped hole is formed in the middle of the first lever swing plate 331, and is movably connected to the first locking slide plate 321 and the first slide stopper 341 through a second waist-shaped hole slide limiting mechanism 392. The second slotted hole sliding limiting mechanism 392 has the same structure as the first slotted hole sliding limiting mechanism 391, and is not described in detail. When the first and second locking devices 311 and 312 are in the locked state, the first locking slide plate 321 is parallel to the first lever swing plate 331. More specifically, when the first locking device 311 and the second locking device 312 are in the locked state, the axes of the locking posts of the first kidney-shaped hole sliding limiting mechanism 391, the second kidney-shaped hole sliding limiting mechanism 392, the first swing connecting mechanism 381, and the first swing connecting mechanism 382 are aligned in four points. Thus, when the first and second locking devices 311 and 312 are in the locked state or the unlocked state, the first locking sliding plate 321 is limited by the first and second kidney-shaped hole sliding limiting mechanisms 391 and 392 at the two ends to be only slidable. When one or both of the first locking device 311 and the second locking device 312 are switched between the locking state and the unlocking state, the first lever swing plate 331 swings to drive the locking column of the second slotted hole sliding limiting mechanism 392 to swing, and further, the first locking slide plate 321 and the first sliding block 341 are driven to swing around the locking column of the first slotted hole sliding limiting mechanism 391. The swinging stroke of the first sliding stopper 341 is limited by the stroke of the first locking device 311 and the second locking device 312 for driving the first locking driving plate 371 and the second locking driving plate 372 to extend and retract when switching between the locking state and the unlocking state. The extension stroke of the first locking driving plate 371 and the second locking driving plate 372 is the extension stroke of the first locking device 311 and the second locking device 312.

In addition, in the present embodiment, the extension stroke of the third locking device 313 is the same as the extension stroke of the first locking device 311 and the second locking device 312, and is D. If the extension stroke of the third locking device 313 is the same as the lateral translation stroke D/2 required by the second sliding block 342, the third locking device 313 may be directly connected to the second sliding block 342. In this embodiment, since the lateral translation stroke of the second sliding block 342 is half of the extension stroke of the third capture device 313 to which it is connected, a lever linkage is required to connect the third capture device 313 and the second sliding block 342. To this end, in this embodiment, a second lock slide 322 and a second lever swing plate 332 are introduced.

The second lock slide plate 322 is provided on the mounting plate 13 by a slide restricting mechanism so that the second lock slide plate 322 can slide relative to the mounting plate 13. The sliding limiting mechanism is implemented by two third slotted hole sliding limiting mechanisms 393 in the embodiment. The third slotted hole sliding limiting mechanism 393 has the same structure as the first slotted hole sliding limiting mechanism 391 described above. The second locking slide plate 322 is movably connected to the second lever swing plate 332, and is connected to the third locking driving plate 373 and the third locking device 313 through the second lever swing plate 332. One end of the second lock slide 322 is fixedly coupled to the second slide stop 342.

One end of the second lever swing plate 332 is disposed on the mounting plate 13 via the swing connecting mechanism 38, and the other end is connected to the locking driving plate 37 via the swing connecting mechanism 38, and is connected to the third locking device 313 via the locking driving plate 37. The second lever swing plate 332 is connected to the second capture slide plate 322 via the swing link 38. Specifically, the second lever arm 332 is disposed on the mounting plate 13 via a fourth swing link 384, and is connected to the third capture driving plate 373 via a third swing link 384. The third capture drive plate 13 is connected to a third capture device 313. The middle of the second lever swing plate 332 is connected to the second lock slide plate 322 through a fifth swing link 385. The fifth swing link mechanism 385 is located at a midpoint of the second lever swing plate 332, that is, the second lock slide plate 322 is connected to a midpoint of the second lever swing plate 332. Therefore, when the third locking device 313 is switched between the locking state and the unlocking state, the second lever swing plate 332 is driven to swing by the third locking driving plate 373, and the second locking slide plate 322 and the second sliding block 342 are driven to slide. Since the second lock slide plate 322 is connected to the middle point of the second lever swing plate 332, the sliding stroke of the second lock slide plate 322 and the second slide stopper 342 is half of the telescopic stroke of the third capture drive plate 373. The extension stroke of the third locking driving plate 373 is the extension stroke of the third locking device 313. The sliding directions of the second lock slide plate 322 and the second slide stopper 342 are parallel to the extension and contraction directions of the first lock driving plate 371, the second lock driving plate 372 and the third lock driving plate 373. When the first, second, and third locking devices 311, 312, and 313 are in the locked state, the sliding directions of the second lock slide plate 331 and the second slide stopper 342 are perpendicular to the first lever swing plate 331.

In addition, the third capture device 313 is disposed opposite to the first capture device 311 and the second capture device 312 so that the lateral translation directions of the first sliding stop 341 and the second sliding stop 342 are opposite.

In this embodiment, the lock link 36 is a pendulum that is rotatable about an axis perpendicular to the mounting plate 13. Specifically, referring to fig. 10, the lock link 36 is a plate-shaped body provided with a lock shaft connection hole 369, and is connected to the lock shaft 20 through the lock shaft connection hole 369. The lock link 36 is disposed on the lock shaft 20 and is fixedly coupled to the lock shaft 20 such that the lock link 36 can rotate synchronously with the lock shaft 20 when the lock shaft 20 is rotated. The locking link 36 includes a first arc 361 and a second arc 362. The first arc 361 and the second arc 362 are centered on the axial direction and have different radii. Specifically, the first arc surface 361 and the second arc surface 362 are centered around the axis of the lock shaft 20, and the radius of the first arc surface 361 is larger than that of the second arc surface 362, so that the first arc surface 361 and the second arc surface 362 are connected by a step surface, that is, two ends of the first arc surface 361 and the second arc surface 362 are connected by a first step surface 363 and a second step surface 364, respectively. Wherein, the first step surface 363 is engaged with the first sliding stopper 341. The first step surface 363 can abut against the first slide stopper 341.

Referring to fig. 7, 8 and 9, the working principle of the present embodiment is as follows:

when the first locking device 311, the second locking device 312 and the third locking device 313 are in the locked state, the first sliding stopper 341 is caught between the locking link 36 and the second sliding stopper 342, and referring to fig. 7, at this time, the locking link 36 is stopped from rotating by the first sliding stopper 341, and the lock shaft 20 and the latch plate are caught. At this time, the first and second slide stoppers 341 and 342 have a stopper width W therebetween. This is the locked state of the locking mechanism and locking device.

If the first locking device 311 and the second locking device 312 are unlocked simultaneously, the first locking device 311 and the second locking device 312 drag the first sliding block 341 to swing through the first lever swing plate 332. After the first sliding block 341 swings laterally for a certain distance, the first sliding block 341 and the second sliding block 342 are separated by staggering, referring to fig. 8. At this time, the locking mechanism and the locking device are in the unlocked state, and the locking link 36 can be rotated in the opening direction R to unlock the locking device, referring to fig. 8 in which the locking link 36 is rotated to the dotted line position. At this time, the first sliding stopper 341 may or may not abut against the first step surface 363 of the locking connector 36. When the first sliding stopper 341 abuts against the first step face 363 of the locking connector 36, the rotating locking connector 36 pushes the first sliding stopper 341 to move, referring to the moving direction indicated by the arrow F in fig. 9. This situation is referred to herein as a first unlocked state.

If one of the first and second latches 311 and 312 is unlocked and the other is in a locked state, the third latch 312 is unlocked. Referring to fig. 9, the first sliding stopper 341 is laterally swung by a distance while the second sliding stopper 342 is laterally moved by a distance, thereby staggering the first sliding stopper 341 and the second sliding stopper 342 to be separated. At this time, the locking mechanism and the locking device are in the unlocked state, and the locking connector 36 can rotate along the opening direction R to unlock the locking device, at this time, the first sliding stopper 341 still abuts on the first step face 363 of the locking connector 36, and the rotating locking connector 36 will push the first sliding stopper 341 to move toward the direction indicated by the arrow F. This condition is referred to herein as the second unlocked state.

If one of the first and second latches 311 and 312 is unlocked and the other is in a locked state, the third latch 312 is in a locked state. Referring to fig. 9, the first sliding block 341 swings laterally a distance insufficient to allow the first sliding block 341 and the second sliding block 342 to be misaligned and separated. The first sliding stopper 341 is still caught between the locking link 36 and the second sliding stopper 342, and the locking link 36 is still unable to rotate. The locking mechanism and the locking device are in a locked state. This situation is referred to herein as the first half-solution state.

If the first and second locking devices 311 and 312 are both in the locked state, the third locking device 312 is unlocked. The second sliding block 342 is laterally displaced a distance, and the lateral displacement of the second sliding block 342 alone is not sufficient to stagger the first sliding block 341 and the second sliding block 342 apart. The first sliding stopper 341 is still caught between the locking link 36 and the second sliding stopper 342, and the locking link 36 is still unable to rotate. The locking mechanism and the locking device are in a locked state. This situation is referred to herein as the second half-solution state.

That is, in the present embodiment, whether the locking link 36 is caught or not depends on the relative lateral movement distance between the first sliding stopper 341 and the second sliding stopper 342, and if the relative lateral movement distance between the first sliding stopper 341 and the second sliding stopper 342 is greater than the catching width W between the first sliding stopper 341 and the second sliding stopper 342, the first sliding stopper 341 and the second sliding stopper 342 are staggered and separated, and the locking mechanism and the locking device are unlocked; if the distance of lateral movement of the first sliding stopper 341 and the second sliding stopper 342 is smaller than the locking width W between the first sliding stopper 341 and the second sliding stopper 342, the first sliding stopper 341 remains locked between the lock link 36 and the second sliding stopper 342, the lock link 36 remains unrotatable, and the lock mechanism and the lock device remain in the locked state.

For convenience, in the present embodiment, the first locking driving plate 371, the second locking driving plate 372 and the third locking driving plate 373 have the same telescopic stroke D. The second lock slide 322 has a lateral translation travel of D/2. When the first, second, and third locking devices 311, 312, and 313 are in the locked state, the first sliding stopper 341 and the first locking sliding plate 321 are coupled to a midpoint of the first lever swing plate 331. Thereby, any one of the first and second locking devices 311 and 312 is unlocked, and the lateral swing stroke of the first sliding block 341 is D/2; when the first and second locking devices 311 and 312 are unlocked, the lateral swing stroke of the first sliding block 341 is D. The catching width W between the first and second slide stoppers 341 and 342 satisfies the condition: d/2< W < D. In the first unlocked state, the first sliding stopper 341 can be separated from the second sliding stopper 342 by shifting because the stroke of the first sliding stopper 341 swinging laterally is D, which is greater than the locking width W. In the second unlocked state, the lateral swing stroke of the first sliding stopper 341 is D/2, the moving stroke of the second sliding stopper 342 is D/2, and the relative lateral movement distance between the first sliding stopper 341 and the second sliding stopper 342 is D, which is greater than the clamping width W, so that the first sliding stopper 341 and the second sliding stopper 342 can be separated by being staggered. In the first half-unlocked state, the lateral swing stroke of the first sliding stopper 341 is D/2, the relative lateral movement distance between the first sliding stopper 341 and the second sliding stopper 342 is D/2, which is smaller than the locking width W, and the first sliding stopper 341 is still locked between the locking connector 36 and the second sliding stopper 342. In the second half-unlocked state, the lateral movement stroke of the second sliding stopper 342 is D/2, the relative lateral movement distance between the first sliding stopper 341 and the second sliding stopper 342 is D/2, which is smaller than the locking width W, and the first sliding stopper 341 is still locked between the locking connector 36 and the second sliding stopper 342.

In the above embodiment, when the lock mechanism and the lock device are in the locked state and the lock link 36 is rotated in the opening direction R, the rotational torque force of the lock link 36 is applied to the second slide stopper 342 through the first slide stopper 341, and the slide restricting mechanism realized by the second slide stopper 342 through the two third kidney-shaped hole slide restricting mechanisms 393 is provided on the mount plate 13. In order to prevent the third slot-shaped sliding limiting mechanism 393 from being damaged when the locking connector 36 is stressed too much, the embodiment is further provided with a fixed stop 351. The fixed stopper 351 is fixedly disposed on the mounting plate 13 for providing a support for the second sliding stopper 342 to bear the acting force. When the locking mechanism and the locking device are in the locked state, the second slide stopper 342 is caught between the fixed stopper 351 and the first slide stopper 341.

In addition, in the present embodiment, a return spring 329 is also connected to the first lock slide 321. The return spring 329 is used to provide a return spring force to the first lock slide 321, and under the return spring force of the return spring 329, the first lock slide 321 is pulled or pushed to a position where the lock mechanism and the lock device are in the locked state.

In addition, in this embodiment, the mounting plate 13 is further provided with a limiting block 352. When the locking mechanism and locking device are in the locked state, the second step surface 364 abuts against the stopper 352. The second stepped surface 364 is provided with an elastic top block mounting hole 365, and an elastic top block is provided through the elastic top block mounting hole 365.

In addition, in the present embodiment, the lock link 36 is a swinging member connected to the lock shaft 20, and those skilled in the art will understand that the lock link 36 may also be a translating member connected to the latch plate.

Further, in order to make the detent better in the first half-released state and the second half-released state, the detent width W between the first sliding stopper 341 and the second sliding stopper 342 generally needs to be close to D, preferably 0.90D < W < 0.99D.

Claims (10)

1. The locking mechanism with three locks and two unlocks is characterized by comprising three locking devices (31) arranged on a mounting plate (13), a first locking sliding plate (321), a first lever swinging plate (331), a first sliding stop block (341), a second sliding stop block (342) and a locking connecting piece (36); when the locking mechanism is in a locking state, the first sliding block (341) is clamped between the second sliding block (342) and the locking connecting piece (36); the three locking devices (31) are respectively a first locking device (311), a second locking device (312) and a third locking device (313); the first sliding block (341) is arranged on the mounting plate (13) through the first locking sliding plate (321) so that the first sliding block (341) can swing laterally and also can translate; when the first slide stopper (341) swings laterally, the first slide stopper can be disengaged from the second slide stopper (342) to release the locked state of the lock mechanism; the first sliding block (341) is in bridge type lever connection with the first locking device (311) and the second locking device (312) through a first lever swinging plate (331), so that the first sliding block (341) swings downwards under the driving of the first locking device (311) and/or the second locking device (312); the second sliding block (342) is connected with the third capture device (313) so that the second sliding block (342) can translate laterally under the drive of the third capture device (313); in the locked state of all three capture devices (31): when one of the first locking device (311) and the second locking device (312) is unlocked, the lateral swing stroke of the first sliding block (341) driven by the unlocked locking device (31) is insufficient to enable the first sliding block (341) and the second sliding block (342) to be unlocked; when the third locking device (313) is unlocked, the lateral translation stroke of the second sliding block (342) is not enough to release the clamping of the first sliding block (341) and the second sliding block (342); when the first locking device (311) and the second locking device (312) are unlocked, the first sliding block (341) swings laterally to separate the first sliding block (341) and the second sliding block (342) to release the clamping position, so that the locking device is unlocked; when one of the first locking device (311) and the second locking device (312) is unlocked and the third locking device (313) is unlocked, the lateral swing of the first sliding block (341) and the lateral translation of the second sliding block (342) enable the first sliding block (341) and the second sliding block (342) to be separated to release the clamping, and therefore the locking device is unlocked.

2. A three-lock two-open locking mechanism according to claim 1, characterized in that one end of the first locking slide plate (321) is provided with a kidney-shaped hole and the slide limiting mechanism (391) is arranged on the mounting plate (13) through the first kidney-shaped hole, so that the first locking slide plate (321) can translate and swing relative to the mounting plate (13); the other end of the first locking sliding plate (321) is fixedly connected with a first sliding stop block (341) and movably connected with a first lever swinging plate (331); two ends of the first lever swinging plate (331) are respectively connected with the first locking device (311) and the second locking device (312) through a first swinging connecting mechanism (381) and a second swinging connecting mechanism (382); the first locking device (311) and the second locking device (312) are positioned on the same side of the first lever swinging plate (331); a waist-shaped hole is formed in the middle of the first lever swinging plate (331), and the first lever swinging plate is movably connected with the first locking sliding plate (321) and the first sliding stop block (341) through a second waist-shaped hole sliding limiting mechanism (392).

3. A locking mechanism of a three-lock two-open as recited in claim 1, characterized in that when the first locking device (311) and the second locking device (312) are both in the locking state, the first locking slide plate (321) is parallel to the first lever swing plate (331), the telescopic directions of the first locking device (311) and the second locking device (312) are perpendicular to the first lever swing plate (331), and the sliding translational direction of the second sliding block (342) is perpendicular to the first lever swing plate (331); the third locking device (313) is arranged opposite to the first locking device (311) and the second locking device (312).

4. A three-lock two-open locking mechanism according to claim 1, further comprising a return spring (329) connected to the first lock slide (321); the return spring (329) is used to either pull or push the first lock slide (321) to the position where the locking mechanism is in the locked state.

5. A three-lock two-open locking mechanism according to claim 1, further comprising a second locking slide (322) and a second lever swing plate (332); the second locking slide (322) is arranged on the mounting plate (13) by means of a slide limiting mechanism, such that the second locking slide (322) can slide translationally relative to the mounting plate (13); one end of the second locking sliding plate (322) is fixedly connected with the second sliding block (342); one end of the second lever swing plate (332) is arranged on the mounting plate (13) through a swing connecting mechanism (38), and the other end of the second lever swing plate is connected with the third locking device (313) through a third swing connecting mechanism (383); the middle of the second lever swinging plate (332) is connected with the second locking sliding plate (322) through a swinging connecting mechanism (38).

6. A locking mechanism of three locks and two unlocks as claimed in claim 5, characterized in that the first (311), second (312) and third (313) catch means have the same telescopic travel D; the second locking slide (322) is connected to a midpoint of the second lever swing plate (332); when the first locking device (311) and the second locking device (312) are in a locking state, the first sliding stop block (341) is connected to the middle point of the first lever swinging plate (331); when the first locking device (311), the second locking device (312) and the third locking device (313) are in a locking state, the clamping width W between the first sliding block (341) and the second sliding block (342) satisfies the following condition: d/2< W < D.

7. A three-lock two-open locking mechanism according to claim 1, further comprising a fixed stop (351) provided on the mounting plate (13), the second sliding stop (342) being trapped between the first sliding stop (341) and the fixed stop (351) when the locking mechanism is in the locked state.

8. A lock mechanism as claimed in any one of claims 1 to 7, wherein the locking link (36) is a pendulum rotatable about an axis perpendicular to the mounting plate (13) and comprising a first arc surface (361) and a second arc surface (362); the first cambered surface (361) and the second cambered surface (362) take the axial direction as a circle center and have different radiuses; two ends of the first cambered surface (361) and the second cambered surface (362) are respectively connected through a first step surface (363) and a second step surface (364); when the first locking device (311), the second locking device (312) and the third locking device (313) are in a locking state, the first step surface (363) is clamped on the first sliding stop block (341).

9. A three-lock two-open locking mechanism according to claim 8, further comprising a stop block (352); when the first locking device (311), the second locking device (312) and the third locking device (313) are in a locking state, the second step surface (364) is abutted against the limiting block (352).

10. The locking device with three locks and two unlocks is characterized by comprising a box body (1), and a lock shaft (20), a lock bolt plate and a mounting plate (13) which are arranged on the box body (1); the mounting plate (13) is arranged in the box body (1) and divides the box body (1) into a first cavity (101) and a second cavity (102); the lock shaft (20) vertically penetrates through the mounting plate (13); the latch plate is arranged in the first cavity (101) and is connected with the latch shaft (20) through a shaft-latch transmission mechanism (200), so that the latch plate can be stretched and contracted when the latch shaft (20) is rotated; a locking mechanism (300) is arranged in the second cavity (102); the locking mechanism (300) is a triple lock double open locking mechanism according to any one of claims 1 to 9; the locking connection (36) connecting the lock shaft (20) and the latch plate; when the first locking device (311), the second locking device (312) and the third locking device (313) are in a locking state, the locking connecting piece (36) is clamped, and the lock shaft (20) and the lock bolt plate are clamped.

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