Triple lock two-way mechanism

Abstract

The utility model relates to a lock technology field especially is related to a three lock two open mechanism, including base and transmission shaft, is equipped with movable door bolt connecting plate, transmission plate, connecting rod subassembly and three groups of locking assembly on the base, wherein two groups of locking assembly all are connected with transmission plate through gear and rack structure, and another group of locking assembly is connected with transmission plate through connecting rod subassembly, is equipped with first rack on the door bolt connecting plate, and transmission shaft forms transmission connection through first gear and first rack meshing and door bolt connecting plate, and transmission plate is fixedly connected with linkage plate, and the door bolt connecting plate is hinged with protection board, is equipped with the stopper for with protection board abutting cooperation on the base, is equipped with the inclined hole of leaning towards the stopper direction on the linkage plate, is equipped with the pin shaft of passing through inclined hole on the protection board, prevents the door bolt connecting plate from continuing to move through the setting protection board and abuts the stopper, prevents the connecting part and lock tongue from being impacted, avoids three lock two open mechanism in locking state being forced to open, eliminates the security risk.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a three-lock two-opening mechanism. Background Technology

[0002] Locks, especially multi-lock and multi-opening locks, have high anti-theft performance and are widely used in financial security products. For example, most bank safes or vaults use multi-lock and multi-opening locks. The safe or vault can only be opened after the multi-lock and multi-opening lock mechanism is unlocked.

[0003] The three-lock two-opening mechanism is a common type of multi-lock two-opening mechanism. Patent CN2293629Y discloses a three-lock combination door lock device. This solution includes three locks, and the three-lock two-opening mechanism can only be unlocked when any two locks are opened, which has a high security factor.

[0004] However, the following problems were found in this solution: When the three-lock two-opening mechanism is locked, the bolt is usually not movable. If external force is applied to drive the drive shaft to rotate and force the bolt to move, a series of connecting parts may be damaged by the force, and the three locks may also be damaged, which may lead to the lock mechanism being forcibly opened, posing a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a three-lock two-opening mechanism. This utility model prevents the bolt connecting plate from moving further by setting a protective plate to abut against the stop block, preventing the connecting parts and the lock tongue from being impacted, avoiding the three-lock two-opening mechanism from being forcibly opened when locked, and eliminating safety hazards.

[0006] The technical solution adopted by this utility model is as follows: a three-lock two-opening mechanism, including a base and a transmission shaft. The base is provided with a movable bolt connecting plate, a transmission plate, a connecting rod assembly, and three sets of locking assemblies. Two sets of locking assemblies are connected to the transmission plate through a gear and rack structure, and the other set of locking assemblies is connected to the transmission plate through a connecting rod assembly. The bolt connecting plate is provided with a first rack. The transmission shaft is connected to the bolt connecting plate through a first gear meshing with the first rack. The transmission plate is fixedly connected with a linkage plate. The bolt connecting plate is hinged with a protective plate. The base is provided with a stop for abutting against the protective plate. The linkage plate is provided with an inclined hole inclined towards the stop. The protective plate is provided with a pin penetrating the inclined hole.

[0007] The linkage plate and the protection plate are respectively set on both sides of the bolt connecting plate. The bolt connecting plate is provided with a clearance hole. The pin is also covered with a pin sleeve. The pin sleeve passes through the clearance hole and is inserted into the oblique hole. The pin sleeve extends to the outside of the oblique hole and is provided with a limiting ring.

[0008] The protective plate is bent to have an abutment plate for the stop block to abut, and the base is provided with a clearance groove for the protective plate and the abutment plate to slide into.

[0009] The bolt connecting plate is also provided with an elastic element and a spring mounting box. The spring mounting box is located on the side of the abutment plate near the stop block. One end of the elastic element extends into the spring mounting box to form an abutment, and the other end abuts against the abutment plate.

[0010] The bolt connecting plate is provided with a limiting pin on the side of the protective plate away from the stop block, and the protective plate abuts against the limiting pin through an elastic element.

[0011] The linkage plate has a strip hole on each side of the corresponding oblique hole, and the bolt connecting plate has a connector on each of the two strip holes. The two connectors are respectively inserted into the corresponding strip holes.

[0012] Each locking assembly includes a lock and a latch. Each latch is locked or unlocked by a corresponding lock. The three locks are a first lock, a second lock, and a third lock. The three latches are a first sliding locking plate, a second sliding locking plate, and a third sliding locking plate. The second and third sliding locking plates are respectively provided with a second rack and a third rack. The transmission plate is provided with a second gear that meshes with both the second and third racks. The linkage assembly includes a first link, a second link, and a third link. One end of the first link is connected to the first sliding locking plate and the other end is connected to the transmission plate. One end of the second link is connected to the base and the other end is connected to the transmission plate. One end of the third link is connected to the middle of the first link and the other end is connected to the middle of the second link.

[0013] A baffle is provided between the first connecting rod and the transmission plate. The baffle is provided with a first sliding groove for sliding connection of the first connecting rod and a second sliding groove for sliding connection of the transmission plate. Two limiting members are fixedly connected to the transmission plate, both of which are inserted into the second sliding groove. There is a certain distance between the two limiting members.

[0014] One end of the baffle is bent with a first stop bar, which is used to abut against the second sliding locking plate or the third sliding locking plate.

[0015] A limiting plate is also fixedly connected to the base. One end of the limiting plate is bent with a second stop bar, which is used to abut against the side of the first stop bar away from the second sliding locking plate.

[0016] The beneficial effects of this utility model are as follows: This utility model prevents the bolt connecting plate from moving further by setting a protective plate to abut against the stop block, preventing the connecting parts and the lock tongue from being impacted. The sliding fit structure of the pin shaft and the oblique hole can generate displacement buffer when the transmission shaft is abnormally stressed. The abutment between the protective plate and the stop block forms a mechanical overload protection mechanism, which not only maintains the normal unlocking function, but also effectively prevents illegal forced opening, avoids the three-lock two-opening mechanism from being forcibly opened in the locked state, and eliminates safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0018] Figure 1 This is a schematic diagram of the three-lock, two-opening mechanism of this utility model;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the present invention, which removes the locking component and the connecting rod assembly;

[0021] Figure 4 for Figure 3 A schematic diagram showing the structure after removing the pin sleeve and washer;

[0022] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0023] Figure 6 This is a structural schematic diagram of another aspect of the present invention;

[0024] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0025] Figure 8 This is a structural schematic diagram from a third perspective of the present invention;

[0026] Figure 9 for Figure 8 A schematic diagram of the structure after removing the limiting plate;

[0027] In the diagram, 1-base, 2-drive shaft, 3-bolt connecting plate, 4-drive plate, 5-first rack, 6-first gear, 7-linkage plate, 8-protective plate, 9-stop block, 10-slanted hole, 11-pin, 12-clearance hole, 13-pin sleeve, 14-limiting ring, 15-abutment plate, 16-clearance groove, 17-elastic element, 18-spring mounting box, 19-limiting pin, 20-strip hole, 21-connector, 22-first lock, 23-... 24-Second lock, 25-First sliding locking plate, 26-Second sliding locking plate, 27-Third sliding locking plate, 28-Second rack, 29-Third rack, 30-Second gear, 31-First connecting rod, 32-Second connecting rod, 33-Third connecting rod, 34-Baffle, 35-First slide groove, 36-Second slide groove, 37-Limiting element, 38-First stop bar, 39-Limiting plate, 40-Second stop bar, 41-Washer. Detailed Implementation

[0028] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0029] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0030] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0031] like Figures 1 to 9 As shown, this is an embodiment of the present invention, a three-lock, two-opening mechanism, including a base 1 and a transmission shaft 2. The base 1 is provided with a movable bolt connecting plate 3, a transmission plate 4, a connecting rod assembly, and three sets of locking assemblies. Two sets of locking assemblies are connected to the transmission plate 4 through a gear and rack structure, and the other set of locking assemblies is connected to the transmission plate 4 through the connecting rod assembly. The bolt connecting plate 3 is provided with a first rack 5. The transmission shaft 2 forms a transmission connection with the bolt connecting plate 3 through a first gear 6 meshing with the first rack 5. The transmission plate 4 is fixedly connected with a linkage plate 7. The bolt connecting plate 3 is hinged with a protective plate 8. The base 1 is provided with a stop block 9 for abutting and cooperating with the protective plate 8. The linkage plate 7 is provided with an inclined hole 10 inclined towards the stop block 9. The protective plate 8 is provided with a pin 11 penetrating the inclined hole 10.

[0032] The beneficial effects of this design are as follows: This utility model prevents the bolt connecting plate from moving further by setting a protective plate to abut against the stop block, preventing the connecting parts and the lock tongue from being impacted. The sliding fit structure between the pin and the oblique hole can generate displacement buffer when the transmission shaft is abnormally stressed. The abutment between the protective plate and the stop block forms a mechanical overload protection mechanism, which not only maintains the normal unlocking function, but also effectively prevents illegal forced opening, avoids the three-lock two-opening mechanism from being forcibly opened in the locked state, and eliminates safety hazards.

[0033] The specific operation process is as follows: when two or more locking components are in the locked state, if the drive shaft continues to drive the bolt connecting plate to move, under the locking of the locking components, the drive plate and the linkage plate are relatively fixed to the base. The protective plate hinged on the bolt connecting plate will rotate relative to the linkage plate through the engagement of the pin and the inclined hole. That is, the pin slides along the inclined direction of the inclined hole, and the inclined hole is inclined towards the stop. The inclined hole guides the pin, and the bolt connecting plate moves a small distance along with the rotation of the protective plate until the protective plate rotates to abut against the stop, at which point the bolt connecting plate can no longer move.

[0034] Further, the linkage plate 7 and the protection plate 8 are respectively disposed on both sides of the bolt connecting plate 3. The bolt connecting plate 3 is provided with a clearance hole 12. The pin 11 is also covered with a pin sleeve 13. The pin sleeve 13 passes through the clearance hole 12 and is inserted into the inclined hole 10. The pin sleeve 13 extends to the outside of the inclined hole 10 and is provided with a limiting ring 14.

[0035] The beneficial effects of this design are as follows: it makes the overall structure more streamlined and compact. The protection system, including the protective plate, is located on the back of the bolt connecting plate, while the transmission system is located on the front of the bolt connecting plate to prevent interference. The pin shaft increases the contact area with the inner wall of the inclined hole through the pin sleeve, allowing the pin sleeve to slide to the far end of the inclined hole more quickly, driving the protective plate to rotate faster. The stroke is shorter, the response is faster, and the protection mechanism is triggered more quickly. The clearance hole allows the pin shaft and pin sleeve to slide freely, providing space for sliding. The limiting ring provides axial limitation for the pin sleeve, making the pin sleeve slide more smoothly.

[0036] Further, the protective plate 8 is bent to have an abutment plate 15 for the stop block 9 to abut, and the base 1 is provided with a clearance groove 16 for the protective plate 8 and the abutment plate 15 to slide into.

[0037] The beneficial effects of this design are as follows: the abutment plate increases the force-bearing area with the stop block, providing a better abutment effect and ensuring the stability of the overload protection mechanism. When the three-lock two-opening mechanism is unlocked, the protection plate will not rotate, allowing the slot for the protection plate and the abutment plate to slide in, avoiding contact between the abutment plate and the stop block, and not affecting the normal unlocking function.

[0038] Furthermore, the bolt connecting plate 3 is also provided with an elastic element 17 and a spring mounting box 18. The spring mounting box 18 is located on the side of the abutment plate 15 near the stop block 9. One end of the elastic element 17 extends into the spring mounting box 18 to form an abutment, and the other end abuts against the abutment plate 15.

[0039] The beneficial effects of this design are as follows: the elastic element uses a spring with existing technology, the spring mounting box is used for spring installation, and the abutment plate is kept rotating away from the stop block under the elastic force of the spring. When the three-lock two-opening mechanism is unlocked normally, the abutment plate is prevented from contacting the stop block. Only when the overload protection mechanism is running, the pin shaft and pin sleeve cooperate with the inclined hole to slide and drive the abutment plate to rotate, thus pressing down the spring.

[0040] In a further configuration, a limiting pin 19 is provided on the side of the door bolt connecting plate 3 corresponding to the protective plate 8 away from the stop block 9, and the protective plate 8 abuts against the limiting pin 19 through an elastic member 17.

[0041] The beneficial effects of this design are as follows: the limit pins limit the movement of the protective plate, preventing it from rotating excessively under the action of the spring, resulting in a more reasonable and stable structure.

[0042] Further, a strip hole 20 is provided on each side of the inclined hole 10 on the linkage plate 7, and a connector 21 is provided on each of the two strip holes 20 on the bolt connecting plate 3. The two connectors 21 are respectively inserted into the corresponding strip holes 20.

[0043] The beneficial effects of this design are as follows: the bolt connecting plate is not only connected to the linkage plate via the pin of the protective plate, but also has two connecting parts that connect to the strip holes of the linkage plate, increasing the number of transmission force points and ensuring stable transmission. The strip holes are circumferential, allowing the connecting parts to slide and providing the bolt connecting plate with a certain distance of movement. The bolt connecting plate drives the two connecting parts to slide along the path of the corresponding strip holes until they abut against the inner wall of one end of the strip hole. Only then does the bolt connecting plate drive the linkage plate to move. Each of the two connecting parts is also equipped with a washer 41. The connecting parts are stably axially connected to the linkage plate through the washer 41, preventing the connecting parts from detaching from the strip holes.

[0044] Further configuration: each locking assembly includes a lock and a latch, each latch being locked or unlocked by a corresponding lock. The three locks are a first lock 22, a second lock 23, and a third lock 24. The three latches are a first sliding locking plate 25, a second sliding locking plate 26, and a third sliding locking plate 27. The second sliding locking plate 26 and the third sliding locking plate 27 are respectively provided with a second rack 28 and a third rack 29. The transmission plate 4 is provided with a second gear 30 that meshes with both the second rack 28 and the third rack 29. The linkage assembly includes a first link 31, a second link 32, and a third link 33. One end of the first link 31 is connected to the first sliding locking plate 25 and the other end is connected to the transmission plate 4. One end of the second link 32 is connected to the base 1 and the other end is connected to the transmission plate 4. One end of the third link 33 is connected to the middle of the first link 31 and the other end is connected to the middle of the second link 32.

[0045] The beneficial effects of this setup are as follows: a three-lock structure with three locks corresponding to three latches, each lock being positioned on the side of its corresponding latch away from the transmission plate to lock or unlock the latch. The second and third sliding locking plates are connected to the transmission plate via a gear and rack connection structure, while the first sliding locking plate is connected to the transmission plate via a linkage assembly. The three latches complement each other, and the bolt connecting plate can only move when any two latches are unlocked, allowing the three-lock, two-opening mechanism to be activated, thus providing basic three-lock, two-opening functionality.

[0046] Furthermore, a baffle 34 is provided between the first connecting rod 31 and the transmission plate 4. The baffle 34 is provided with a first sliding groove 35 for sliding connection of the first connecting rod 31 and a second sliding groove 36 for sliding connection of the transmission plate 4. Two limiting members 37 are fixedly connected to the transmission plate 4, both of which are inserted into the second sliding groove 36. There is a certain distance between the two limiting members 37.

[0047] The beneficial effects of this design are as follows: A baffle is provided for transmission between the first connecting rod and the transmission plate. Both the first and second sliding grooves are unicircular, and their axes are perpendicular. The first connecting rod slides along the first sliding groove, allowing it to rotate and move along its direction. The transmission plate is slidably connected to the second sliding groove via two limiting members. When both the second and third sliding locking plates are unlocked, the transmission plate and the baffle move synchronously, and the limiting members do not slide within the second sliding groove. When only one of the second or third sliding locking plates is unlocked, the transmission plate moves with the locking tongue via a gear and rack structure, while the baffle remains stationary. The limiting members on the transmission plate then slide within the second sliding groove. The extreme positions of the transmission plate's movement are when the two spaced limiting members abut against the ends of the second sliding groove. In summary, this connection structure allows both the baffle and the transmission plate to move synchronously, and the transmission plate to move independently, depending on the unlocked state of the second and third sliding locking plates.

[0048] In a further configuration, one end of the baffle 34 is bent to have a first stop bar 38, which is used to abut against the second sliding locking plate 26 or the third sliding locking plate 27.

[0049] The beneficial effects of this design are as follows: when both the second and third sliding locking plates are unlocked, the first stop bar can simultaneously abut against and move synchronously with both the second and third sliding locking plates. When only one of the second and third sliding locking plates is unlocked, only the other locked latch will abut against the first stop bar, keeping the first stop bar fixed and ensuring the stability of the three-lock two-open transmission.

[0050] Furthermore, a limiting plate 39 is fixedly connected to the base 1. One end of the limiting plate 39 is bent with a second stop bar 40, which is used to abut against the side of the first stop bar 38 away from the second sliding locking plate 26.

[0051] The beneficial effects of this design are as follows: the second stop of the limiting plate is used to block the first stop, while the other side of the first stop abuts against the second and third sliding locking plates, restricting the movement path of the baffle and ensuring that the baffle, the second sliding locking plate and the third sliding locking plate can all move smoothly and horizontally, preventing jamming during unlocking.

[0052] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A three-lock, two-opening mechanism, comprising a base (1) and a transmission shaft (2), wherein the base (1) is provided with a movable bolt connecting plate (3), a transmission plate (4), a connecting rod assembly, and three sets of locking assemblies, wherein two sets of locking assemblies are connected to the transmission plate (4) via a gear and rack structure, and the other set of locking assemblies is connected to the transmission plate (4) via a connecting rod assembly; the bolt connecting plate (3) is provided with a first rack (5); the transmission shaft (2) is connected to the bolt connecting plate (3) via a first gear (6) meshing with the first rack (5), characterized in that: The transmission plate (4) is fixedly connected to the linkage plate (7), the bolt connecting plate (3) is hinged to the protective plate (8), the base (1) is provided with a stop (9) for abutting and cooperating with the protective plate (8), the linkage plate (7) is provided with an inclined hole (10) inclined towards the stop (9), and the protective plate (8) is provided with a pin (11) penetrating the inclined hole (10).

2. The three-lock, two-open mechanism according to claim 1, characterized in that: The linkage plate (7) and the protection plate (8) are respectively set on both sides of the bolt connecting plate (3). The bolt connecting plate (3) is provided with a clearance hole (12). The pin (11) is also covered with a pin sleeve (13). The pin sleeve (13) passes through the clearance hole (12) and is inserted into the inclined hole (10). The pin sleeve (13) extends to the outside of the inclined hole (10) and is provided with a limiting ring (14).

3. The three-lock, two-open mechanism according to claim 2, characterized in that: The protective plate (8) is bent to have an abutment plate (15) for the stop block (9) to abut, and the base (1) is provided with a relief groove (16) for the protective plate (8) and the abutment plate (15) to slide into.

4. The three-lock, two-open mechanism according to claim 3, characterized in that: The bolt connecting plate (3) is also provided with an elastic element (17) and a spring mounting box (18). The spring mounting box (18) is located on the side of the abutment plate (15) near the stop block (9). One end of the elastic element (17) extends into the spring mounting box (18) to form an abutment, and the other end abuts against the abutment plate (15).

5. The three-lock, two-open mechanism according to claim 4, characterized in that: The bolt connecting plate (3) is provided with a limiting pin (19) on the side of the protective plate (8) away from the stop block (9). The protective plate (8) abuts against the limiting pin (19) through an elastic element (17).

6. The three-lock, two-open mechanism according to claim 1, characterized in that: On the linkage plate (7), a strip hole (20) is provided on both sides of the oblique hole (10). On the bolt connecting plate (3), a connector (21) is provided on each of the two strip holes (20). The two connectors (21) are respectively inserted into the corresponding strip holes (20).

7. The three-lock, two-opening mechanism according to claim 1, characterized in that: Each locking assembly includes a lock and a latch. Each latch is locked or unlocked by a corresponding lock. The three locks are a first lock (22), a second lock (23), and a third lock (24). The three latches are a first sliding locking plate (25), a second sliding locking plate (26), and a third sliding locking plate (27). The second sliding locking plate (26) and the third sliding locking plate (27) are respectively provided with a second rack (28) and a third rack (29). The transmission plate (4) is provided with a rack that simultaneously engages with the first... The second gear (30) meshes with the second rack (28) and the third rack (29). The linkage assembly includes a first link (31), a second link (32) and a third link (33). One end of the first link (31) is connected to the first sliding locking plate (25) and the other end is connected to the transmission plate (4). One end of the second link (32) is connected to the base (1) and the other end is connected to the transmission plate (4). One end of the third link (33) is connected to the middle of the first link (31) and the other end is connected to the middle of the second link (32).

8. The three-lock, two-open mechanism according to claim 7, characterized in that: A baffle (34) is provided between the first connecting rod (31) and the transmission plate (4). The baffle (34) is provided with a first sliding groove (35) for sliding connection of the first connecting rod (31) and a second sliding groove (36) for sliding connection of the transmission plate (4). Two limiting members (37) are fixedly connected to the transmission plate (4), both of which are inserted into the second sliding groove (36). There is a certain distance between the two limiting members (37).

9. The three-lock, two-open mechanism according to claim 8, characterized in that: One end of the baffle (34) is bent to have a first stop bar (38), which is used to abut against the second sliding locking plate (26) or the third sliding locking plate (27).

10. The three-lock, two-open mechanism according to claim 9, characterized in that: A limiting plate (39) is also fixedly connected to the base (1). One end of the limiting plate (39) is bent with a second stop (40). The second stop (40) is used to abut against the side of the first stop (38) away from the second sliding locking plate (26).

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