A manually unlockable electric lock

Abstract

The utility model relates to the field of electric lock discloses a kind of electric lock that can be manually unlocked, including shell and the lock catch being set on shell, the middle part of lock catch is hinged on shell and the two ends of lock catch are respectively located the locking end of shell outside and the driving end located in shell inside, driving piece that is telescopic in shell is set, and driving end is upturned or reset along with telescopic drive, locking end is upturned or reset along with driving end to realize locking or unlocking, and the telescoping of driving piece is controlled to electric control component, manually unlocking structure that when electric control component fails, manually unlocking lock catch is arranged between shell and lock catch.The electric lock is manually unlocked by manually unlocking structure when electric control component does not work and cannot be unlocked.

Description

Technical Field

[0001] This utility model relates to the field of electric locks, and in particular to an electric lock that can be manually unlocked. Background Technology

[0002] Most ovens on the market come with an electric lock. When the oven door is closed, the motor drives the latch to rotate and lock the door.

[0003] Chinese Patent Application No. 201820110803.6 discloses a latch-type oven door lock. The door lock includes a housing with a groove shape. A pressure rod and a latch are installed side by side at the front end of the groove. The pressure rod is elastically telescopically mounted on the housing. The latch is elastically rotatably connected to the housing. A push rod is installed in the middle and rear of the housing on the same side as the latch. The rotation of the latch is controlled by the extension and retraction of the push rod, which is controlled by a motor. The lock also includes a first micro switch and a second micro switch that are electrically connected to the motor via a PCB board.

[0004] In the above scheme, when locking, pushing the lever causes it to retract, activating the first microswitch, which starts the motor and drives the push rod forward. The push rod's front end then presses against the rear end of the latch, causing the latch's rear end to tilt upwards, thus lowering the latch's front end and locking the lock. After locking, the second microswitch is activated, stopping the motor. Similarly, when unlocking, starting the motor causes the push rod to retract, removing its front end from the latch's rear end. The latch then springs back to its original position, lowering the latch's rear end and raising the front end, thus unlocking the lock.

[0005] However, once the electric lock is engaged, it cannot be unlocked in the event of an unexpected power outage, damage to the oven control board circuit components, or motor failure, resulting in the oven door being unable to be opened, causing inconvenience and trouble for the user. Utility Model Content

[0006] This invention addresses the shortcoming of existing technologies where the lock cannot be unlocked if an unexpected situation causes the motor to malfunction after the latch is locked. It provides an electric lock that can be manually unlocked even when the motor is not working.

[0007] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0008] A manually unlockable electric lock includes a housing and a latch mounted on the housing. The latch is hinged to the housing at the middle, and its two ends are a locking end located outside the housing and a driving end located inside the housing, respectively. A driving component is telescopically mounted inside the housing, which flips or resets the driving end as it telescopically extends or retracts. The locking end locks or unlocks as the driving end flips or resets. The telescopical extension and retraction of the driving component is controlled by an electronic control component. A manual unlocking structure is provided between the housing and the latch to manually unlock the latch when the electronic control component fails.

[0009] Using the above scheme, the electronic control component drives the driving element to move closer to the driving end, causing the driving end to flip upwards, which in turn causes the locking end to flip downwards to achieve locking. When unlocking is required, if the electronic control component is not faulty, it controls the driving element to move away from the driving end. After the thrust from the driving element on the driving end disappears, the driving end flips downwards to reset, causing the locking end to flip upwards to complete unlocking. If the electronic control component fails, the driving element cannot move away from the driving end, resulting in the inability to unlock. In this case, a manual unlocking structure is used to manually drive the locking end to flip upwards to unlock, ensuring that manual unlocking is possible even when the motor is not working.

[0010] Preferably, the manual unlocking structure includes a downwardly protruding locking block at the drive end, a mating inclined surface on the end of the drive member near the drive end and / or on the locking block, which drives the drive end to flip upward as the drive member moves towards the drive end, a clearance groove formed on the drive member for the locking block and the drive end to flip down and reset when the drive end flips up to the maximum angle and the drive member continues to move closer to the locking end, and an operating component on the housing that allows the drive member to be manually driven to continue moving closer to the locking end after the drive end flips up to the maximum angle.

[0011] Using the above scheme, when the driving component moves closer to the driving end, the squeezing and sliding action of the driving inclined surface drives the driving end to flip upwards to its maximum angle, while the locking end flips downwards to lock. If unlocking is needed but the motor is not working, the operating component drives the driving component to continue moving closer to the locking end and extending until it moves to the point where the clearance groove is directly opposite the locking block. Once the resistance from the driving component on the locking block disappears, the locking block falls into the clearance groove, causing the locking block and the driving end to flip downwards and reset, i.e., the locking end flips upwards and resets, thus achieving unlocking.

[0012] Preferably, the operating component includes a drive push rod that extends partially from inside the housing to outside the housing. A first rack and a second rack are respectively provided on the side of the drive push rod and the drive component facing each other. A transmission gear is rotatably provided on the housing that meshes with the first rack and the second rack simultaneously.

[0013] Using the above scheme, the first rack, the transmission gear and the second rack mesh together, so that the drive push rod and the drive component move synchronously in opposite directions. Pushing the drive push rod inward can drive the drive component to continue to move closer to the locking end and extend.

[0014] Preferably, the operating component includes a drive rod, one end of which is located outside the housing and the other end is connected to the drive element.

[0015] Using the above solution, another specific structure is provided to drive the driving component to continue extending closer to the locking end. The driving rod and the driving component move synchronously and in the same direction. Pulling the driving rod outward will drive the driving component to continue extending closer to the locking end.

[0016] Preferably, the electronic control assembly includes a motor disposed on the housing, a transmission structure disposed between the motor and the drive member that drives the drive member to move closer to the drive end or disengage from the drive member when the motor is running, and a second spring disposed between the drive member and the housing that drives the drive member to move away from the drive end and reset when the resistance from the transmission structure on the drive member disappears. An electronic control structure for controlling the starting and stopping of the motor is disposed between the motor and the housing.

[0017] Preferably, the transmission structure includes a rotating shaft rotatably connected to the housing, a drive block protruding vertically outward from the outer ring wall of the rotating shaft, which rotates with the rotating shaft and can push the drive member closer to the drive end or disengage from the drive member, and a gear set disposed between the rotating shaft and the motor to drive the rotating shaft to rotate when the motor is running.

[0018] Using the above scheme, when the motor runs, the drive block rotates near the drive component, pushing the drive component closer to the drive end; when the drive block rotates away from the drive component, it can disengage from the drive component, and the drive component, under the action of the second spring, moves away from the drive end to reset. Only by setting a transmission structure that can disengage from the drive component can it be ensured that the drive component can smoothly continue to move closer to the locking end after disengaging from the transmission structure, thus completing manual unlocking.

[0019] Preferably, the end of the drive block away from the rotating shaft has an outwardly convex arc surface.

[0020] The above scheme is adopted, and the surface is set to reduce or prevent jamming between the drive block and the drive component when they move, so as to ensure that they can move smoothly relative to each other.

[0021] This utility model has significant technical effects due to the adoption of the above technical solutions: When the electric lock is in the locked state, the drive end flips up to the maximum angle. At this time, if unlocking is required but the motor cannot operate normally, the operating component drives the drive component to continue moving closer to the locking end until the avoidance groove is aligned with the block. After the thrust from the drive component on the block disappears, the block and the drive end flip down, that is, the locking end flips up to unlock, ensuring that unlocking can be achieved manually even when the motor is not working. Attached Figure Description

[0022] Figure 1 This is an isometric view of a manually unlockable electric lock in one embodiment when it is normally unlocked;

[0023] Figure 2 This is the isometric view of a manually unlockable electric lock after it has been properly unlocked and the housing has been removed, as described in the embodiment. Figure 1 ;

[0024] Figure 3 This is a front view of a manually unlockable electric lock in the embodiment after it has been properly unlocked and the housing has been removed;

[0025] Figure 4This is the isometric view of a manually unlockable electric lock after it has been properly unlocked and the housing has been removed, as described in the embodiment. Figure 2 ;

[0026] Figure 5 This is a front view of an electrically operated lock that can be manually unlocked, with the housing removed, as described in the embodiment.

[0027] Figure 6 This is an isometric view of an electrically operated lock that can be manually unlocked, with the housing removed, as described in the embodiment.

[0028] Figure 7 This is a front view of a manually unlockable electric lock after the housing has been removed and the lock is manually unlocked, according to one embodiment.

[0029] The parts referred to by the numbers in the above attached figures are as follows: 1. Housing; 2. Pressure rod; 3. First spring; 4. First micro switch; 5. Lock; 501. Locking end; 502. Driving end; 6. Torsion spring; 7. Clamping block; 8. Driving component; 9. Second spring; 10. Clearance groove; 11. Second micro switch; 12. Driving push rod; 13. First rack; 14. Second rack; 15. Transmission gear; 16. Motor; 17. Rotating shaft; 18. Driving block; 19. Arc surface; 20. Gear set; 21. Mating inclined surface; 22. Clamp; 23. Abutment block; 24. Reinforcing rib; 25. Clearance groove. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] Example

[0032] A manually unlockable electric lock, see reference. Figures 1 to 7 The device includes a housing 1, with a pressure rod 2 telescopically attached to one end of the housing 1. A first spring 3 is provided between the pressure rod 2 and the housing 1 along the telescopic direction of the pressure rod 2. When the first spring 3 is in its initial state, the pressure rod 2 partially extends out of the housing 1.

[0033] A latch 5 is provided above the pressure rod 2. The latch 5 is hinged to the housing 1 in the middle. The front end of the latch 5 is located outside the housing 1 to form a locking end 501. The rear end of the latch 5 is located inside the housing 1 to form a driving end 502. The driving end 502 flips upward away from the pressure rod 2, causing the locking end 501 to flip downward towards the pressure rod 2 to lock. Similarly, the driving end 502 flips downward to reset, causing the locking end 501 to flip upward to unlock. A torsion spring 6 is provided between the latch 5 and the housing 1. When the torsion spring 6 is in its initial state, the locking end 501 is away from the pressure rod 2 and is in the unlocked state.

[0034] The side wall of the drive end 502 is provided with an outward protruding abutment block 23, and the pressure rod 2 is provided with an upward buckle 22. When the pressure rod 2 partially extends out of the housing 1 in the initial state and the locking end 501 is away from the pressure rod 2 in the unlocked state, the upper end surface of the abutment block 23 abuts against the lower end surface of the horizontal section of the buckle 22. That is, the abutment block 23 cannot be flipped upward away from the pressure rod 2, so that the drive end 502 cannot be flipped upward, thereby ensuring that the locking end 501 will not be accidentally flipped downward.

[0035] Inside the housing 1, a driving member 8 is reciprocating along the extension and retraction direction of the pressure rod 2. In this embodiment, the driving member 8 is a driving rod. The driving member 8 is located between the pressure rod 2 and the latch 5. A locking block 7 protrudes downward from the driving end 502. Both the end of the driving member 8 near the driving end 502 and the locking block 7 are provided with a mating inclined surface 21 that drives the driving end 502 to flip upward as the driving member 8 moves towards the driving end 502. When the driving end 502 flips upward to its maximum angle, the locking end 501 is in a locked state. An avoidance groove 10 is formed on the driving member 8. When the driving end 502 flips upward to its maximum angle and the driving member 8 continues to extend, the avoidance groove 10 is aligned with the locking block 7, allowing the locking block 7 to fall and insert, that is, the locking block 7 and the driving end 502 flip down to reset.

[0036] A rotating shaft 17 is rotatably mounted inside the housing 1. A driving block 18 protrudes vertically outward from the outer ring wall of the rotating shaft 17. The end of the driving block 18 away from the rotating shaft 17 has an outwardly convex arc surface 19. A motor 16 is mounted on the housing 1. The motor 16 and the rotating shaft 17 are transmitted through a gear set 20. The motor 16 drives the rotating shaft 17 to rotate through the gear set 20, thereby driving the driving block 18 to rotate. When the driving block 18 rotates closer to the driving member 8, it pushes the driving member 8 to move closer to the driving end 502. When the driving block 18 rotates away from the driving member 8, it disengages from the driving member 8. A second spring 9 is provided between the driving member 8 and the housing 1 along the moving direction of the driving member 8. When the driving block 18 disengages from the driving member 8, the driving member 8 moves away from the locking end 501 and resets under the action of the second spring 9.

[0037] A drive push rod 12 is telescopically mounted on one end of the housing 1 where the pressure rod 2 is located. The front end of the drive push rod 12 is located outside the housing 1, and the rear end of the drive push rod 12 is located inside the housing 1. Inside the housing 1, a first rack 13 is mounted on the drive push rod 12 along the moving direction of the drive member 8. A second rack 14 is mounted on the side wall of the drive member 8 opposite to the first rack 13 along the moving direction of the drive member 8. A transmission gear 15 is rotatably mounted inside the housing 1, meshing with both the first rack 13 and the second rack 14. When the drive push rod 12 moves into the housing 1, it drives the drive member 8 to move closer to the locking end 501. As the drive member 8 continues to move closer to the locking end 501, it causes the clearance groove 10 to align with the locking block 7. The locking block 7 and the drive end 502 flip downwards to reset, causing the locking end 501 to flip upwards to unlock. A reinforcing rib 24 is provided in the relief groove 10 along the extension and retraction direction of the drive member 8 to increase the resistance to deformation when the drive member 8 and the card block 7 are squeezed and slid together. Therefore, a relief groove 25 is provided on the card block 7. When the card block 7 falls and inserts into the relief groove 10, the reinforcing rib 24 is inserted into the relief groove 25 to avoid obstructing the falling insertion of the card block 7 and to ensure that the card block 7 and the drive end 502 can be flipped downward smoothly.

[0038] The electronic control structure includes the aforementioned pressure rod 2, and also includes a first micro switch 4, a second micro switch 11 disposed within the housing 1, and a control module electrically connected to the first micro switch 4, the second micro switch 11, and the motor 16. The control module, as well as the connection, control program, and method between the control module and the first micro switch 4, the second micro switch 11, and the motor 16, are all existing technologies and will not be described in detail here.

[0039] When the oven door is closed, the pressure rod 2 will retract inward and touch the first micro switch 4. The control module controls the motor 16 to start, and the gear set 20 drives the rotating shaft 17 to rotate, which in turn drives the drive block 18 to rotate. The drive block 18 rotates closer to the drive member 8, pushing the drive member 8 closer to the drive end 502. Under the action of the inclined surface 21, the locking block 7 and the drive end 502 flip upward, that is, the locking end 501 flips downward to lock. The drive member 8 moves until it touches the second micro switch 11, and the control module controls the motor 16 to stop. At this time, the drive end 502 flips upward to the maximum angle, and the locking end 501 completes the locking. The first spring 3 and the second spring 9 are in a compressed state, and the torsion spring 6 is in a deformed state, all of which have a restoring elastic force.

[0040] During unlocking, the control module starts the motor 16, causing the drive block 18 to rotate away from the drive component 8 and disengage from it. After the resistance from the drive block 18 on the drive component 8 disappears, the drive component 8 moves away from the drive end 502 and resets under the action of the second spring 9, disengaging from the locking block 7. After the thrust from the drive component 8 on the locking block 7 disappears, the drive end 502 and the locking block 7 flip downwards and reset under the action of the torsion spring 6, while the locking end 501 flips upwards to unlock. After the oven door is opened, the pressure rod 2 extends and resets under the action of the first spring 3.

[0041] If unlocking is required but motor 16 cannot operate normally, manual unlocking is used. The drive push rod 12 is pushed, causing it to move into the housing 1. Through the meshing of the first rack 13, transmission gear 15, and second rack 14, the drive member 8 continues to move closer to the locking end 501 until it moves to the point where the clearance groove 10 is directly opposite the locking block 7. After the resistance from the drive member 8 on the locking block 7 disappears, the locking block 7 falls into the clearance groove 10 under the action of the torsion spring 6, ensuring that the locking block 7 and the drive end 502 are reset downwards, i.e., the locking end 501 is reset upwards, thus achieving unlocking. After the oven door is opened, the pressure rod 2 extends and resets under the action of the first spring 3.

[0042] After subsequent repairs, motor 16 drives drive block 18 to rotate away from drive component 8. External force drives locking end 501 to flip downward, causing drive end 502 and latch 7 to flip upward until latch 7 disengages from clearance groove 10. After the resistance from latch 7 on drive component 8 disappears, drive component 8 moves away from drive end 502 and resets under the action of second spring 9. After the external force is removed, locking end 501 resets upward under the action of torsion spring 6 and returns to the unlocked state, ready for the next use.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A manually unlockable electric lock, comprising a housing (1) and a latch (5) disposed on the housing (1), the latch (5) being hinged to the housing (1) at its middle portion, and the two ends of the latch (5) being a locking end (501) located outside the housing (1) and a driving end (502) located inside the housing (1), wherein a driving member (8) is provided inside the housing (1) for extending and retracting, causing the driving end (502) to flip up or reset as it extends and retracts, the locking end (501) locking or unlocking as the driving end (502) flips up or resets, and the extension and retraction of the driving member (8) is controlled by an electronic control component, characterized in that: A manual unlocking structure is provided between the housing (1) and the latch (5) to manually unlock the latch (5) when the electronic control component fails.

2. The manually unlockable electric lock according to claim 1, characterized in that: The manual unlocking structure includes a card block (7) protruding downward from the drive end (502), and a mating inclined surface (21) provided on the end of the drive member (8) near the drive end (502) and / or on the card block (7) to drive the drive end (502) to flip upward as the drive member (8) moves towards the drive end (502). A clearance groove (10) is formed on the drive member (8) to allow the card block (7) and the drive end (502) to flip down and reset when the drive end (502) flips up to the maximum angle and the drive member (8) continues to move closer to the locking end (501). An operating component is provided on the housing (1) to manually drive the drive member (8) to continue moving closer to the locking end (501) after the drive end (502) flips up to the maximum angle.

3. The manually unlockable electric lock according to claim 2, characterized in that: The operating components include a drive push rod (12), which extends partially from inside the housing (1) to outside the housing (1). A first rack (13) and a second rack (14) are respectively provided on the side of the drive push rod (12) and the drive member (8) facing each other. A transmission gear (15) is rotatably provided on the housing (1) and simultaneously meshes with the first rack (13) and the second rack (14).

4. The manually unlockable electric lock according to claim 2, characterized in that: The operating components include a drive lever, one end of which is located outside the housing (1) and the other end is connected to the drive unit (8).

5. The manually unlockable electric lock according to claim 1, characterized in that: The electronic control assembly includes a motor (16) disposed on the housing (1), a transmission structure disposed between the motor (16) and the drive member (8) for moving the drive member (8) closer to the drive end (502) or disengaging from the drive member (8) when the motor (16) is running, and a second spring (9) disposed between the drive member (8) and the housing (1) for moving the drive member (8) away from the drive end (502) and resetting when the resistance from the transmission structure on the drive member (8) disappears. An electronic control structure for controlling the opening and closing of the motor (16) is disposed between the motor (16) and the housing (1).

6. The manually unlockable electric lock according to claim 5, characterized in that: The transmission structure includes a rotating shaft (17) rotatably connected to the housing (1), a drive block (18) protruding vertically outward on the outer ring wall of the rotating shaft (17) and rotating with the rotating shaft (17) to push the drive member (8) closer to the drive end (502) or disengage from the drive member (8), and a gear set (20) disposed between the rotating shaft (17) and the motor (16) to drive the rotating shaft (17) to rotate when the motor (16) is running.

7. The manually unlockable electric lock according to claim 6, characterized in that: The end of the drive block (18) away from the rotating shaft (17) has an outwardly convex arc surface (19).

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