Door lock capable of being unlocked emergently

Abstract

The invention discloses a door lock capable of being unlocked emergently, which comprises a lock head provided with a door hook B and a lock body capable of locking or unlocking the door hook B by utilizing a locking mechanism, and the locking mechanism can start a motor and indirectly drive a locking gear to rotate to lock or unlock the door hook B by utilizing a transmission assembly. According to the locking mechanism, when the unlocking gear is manually controlled, the locking gear can rotate to release the door hook B, the linkage between the transmission assembly and the locking gear is temporarily released, the overall structure is simple, the use flexibility is high, and the phenomenon that the door of the household appliance cannot be opened under the emergency condition can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, in particular to the technical field of door locks capable of emergency unlocking. Background Art

[0002] Household appliances, such as dishwashers or washing machines, are usually provided with a door cover for opening or covering the opening and a door lock for locking the housing and the door cover together, so as to prevent the user from opening the door in advance and causing a large amount of water and washed objects to flow out during operation by utilizing the door lock.

[0003] Existing door locks usually use a motor-driven locking mechanism to lock or unlock, such as the automobile door lock electric unlocking device with publication number CN108468486A; however, in an emergency, such as a power outage or motor damage, the user will not be able to open the door and take out the unwashed dishes or clothes in time, which will affect the user's normal life and needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a door lock that can be unlocked in an emergency. The door lock has a simple overall structure and high flexibility in use, and can effectively prevent the occurrence of a phenomenon in which a household appliance cannot open the door in an emergency.

[0005] To achieve the above-mentioned purpose, the present invention proposes a door lock that can be unlocked urgently, including a lock head provided with a door hook B and a lock body that can lock or unlock the door hook B by utilizing a locking mechanism. The locking mechanism can start a motor and utilize a transmission component to indirectly drive a locking gear to rotate to lock or release the door hook B. The locking mechanism can also allow the locking gear to rotate to release the door hook B while temporarily releasing the linkage between the transmission component and the locking gear when the unlocking gear is manually operated.

[0006] Preferably, the unlocking gear can, while being manually pressed down and twisted, drive the locking gear to rotate to release the door hook B, and on the other hand, use the rocker to tilt the transmission assembly and temporarily disengage the transmission assembly from the locking gear.

[0007] Preferably, the transmission assembly includes a worm, a worm wheel and a transmission gear, the worm is installed on the output shaft of the motor and meshes with the worm wheel, the transmission gear is coaxially arranged above the worm wheel and can move up and down relative to the worm wheel, the worm wheel and the transmission gear can be meshed up and down by the inner recess and the lower protrusion, the transmission gear and the unlocking gear are respectively meshed with the locking gear, and the two ends of the rocker arm can swing up and down and are respectively aligned with the transmission gear and the unlocking gear.

[0008] Preferably, the locking gear is provided with a notch on the teeth, forming a short tooth structure that is shorter. The unlocking gear can be manually unlocked and rotated until the door hook B reaches the unhooking position, and then it can be disengaged from the locking gear through the notch and keep the locking gear stationary.

[0009] Preferably, the driving gear and the unlocking gear can be automatically restored to their original positions by the first elastic member and the second elastic member respectively after the unlocking gear is released.

[0010] Preferably, the door hook B is provided with a bent portion at the end. The lock body is housed with a locking mechanism in a housing. The housing and the locking gear respectively have a lock hole B and a wheel opening for the bent portion to enter and exit. The lock hole B and the wheel opening can lock the bent portion when they are staggered and release the bent portion when they are aligned. The door hook B is provided with a bent portion at the end. The housing and the locking gear respectively have a lock hole B and a wheel opening for the bent portion to enter and exit. The lock hole B and the wheel opening can lock the bent portion when they are staggered and release the bent portion when they are aligned.

[0011] Preferably, the housing also has a manual unlocking opening provided opposite to the unlocking gear, and the unlocking gear is provided with a manual operation portion extending out of the housing along the manual unlocking opening.

[0012] Preferably, the lock head is also provided with a door hook A. The lock body is housed with a door opening and closing mechanism in a housing, and the door opening and closing mechanism can automatically bite the door hook A when the door panel is closed.

[0013] Preferably, the door hook A can enter the housing along the lock hole A and is provided with a notch at the end. The door opening and closing mechanism includes a lock block and a third elastic member. The lock block can move along a direction perpendicular to the direction in which the door hook A is inserted into the lock hole A by using a pointed protrusion and compress the third elastic member until the pointed protrusion is stuck in the notch.

[0014] Preferably, the housing is also installed with a door closing signal switch and a door locking signal switch.

[0015] Advantages of the present invention: By arranging the door hook B and the locking mechanism on the lock head and the lock body respectively, the locking mechanism can start the motor and cooperate with the transmission component to drive the locking gear to rotate forward and reverse and lock or release the door hook B, and the unlocking gear of the locking mechanism can be manually controlled in an emergency state to make the locking gear rotate on one hand to release the door hook B and temporarily release the linkage between the transmission component and the locking gear on the other hand. The overall structure is simple and the use flexibility is high, which can effectively avoid the occurrence of household appliances unable to open the door in an emergency; by adopting a worm, a worm wheel and a transmission gear to form a transmission component together, and adding a swingable swing rod between the transmission gear and the unlocking gear, the swing rod can be used to separate the worm wheel and the transmission gear up and down when the unlocking gear is pressed down to avoid the motor continuing to lock the locking gear; and the locking gear can be synchronously rotated when the unlocking gear is turned.

[0016] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the lock body of the door lock capable of emergency unlocking of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the lock head of the door lock capable of emergency unlocking of the present invention; Figure 3 It is a schematic diagram of the internal structure of the lock body of the door lock capable of emergency unlocking of the present invention; Figure 4 It is a diagram of the door opening and closing process of the door opening and closing mechanism of the door lock capable of emergency unlocking of the present invention; Figure 5 It is a schematic diagram of an explosion of the lock body of the door lock capable of emergency unlocking of the present invention when the door opening and closing mechanism, the door closing signal switch and the door locking signal switch are removed; Figure 6 It is a locking schematic diagram of the locking mechanism of the door lock capable of emergency unlocking of the present invention; Figure 7 It is a schematic diagram of unlocking the locking mechanism of the door lock capable of emergency unlocking of the present invention; Figure 8 It is a top view of the lock body of the door lock capable of emergency unlocking of the present invention; Figure 9 yes Figure 8 AA section view Figure 10 It is a schematic diagram of the assembly position of the worm gear and the transmission gear of the door lock capable of emergency unlocking of the present invention; Figure 11 It is a front view of the worm gear and the transmission gear of the door lock capable of emergency unlocking of the present invention when they are assembled; Figure 12 yes Figure 11 BB section view; Figure 13 It is a three-dimensional structural schematic diagram of the unlocking gear of the door lock capable of emergency unlocking according to the present invention.

[0018] In the figure: 1-housing, 11-lock hole A, 12-lock hole B, 13-manual unlocking port, 2-door opening and closing mechanism, 21-locking block, 22-third elastic member, 3-locking mechanism, 31-motor, 32-worm, 33-worm wheel, 331-inner concave portion, 34-transmission gear, 341-lower convex portion, 342-first convex ridge, 35-locking gear, 351-wheel mouth, 352-vacant portion, 36-unlocking gear, 361-manual operating portion, 362-second convex ridge, 37-swing rod, 38-first elastic member, 39-second elastic member, 4-door closing signal switch, 5-door locking signal switch, 6-lock head, 61-door hook A, 62-door hook B, 7-rotating shaft. DETAILED DESCRIPTION

[0019] See also Figures 1 to 13 The door lock capable of emergency unlocking of the present invention comprises a lock head 6 provided with a door hook B62 and a lock body capable of locking or unlocking the door hook B62 by utilizing a locking mechanism 3. The locking mechanism 3 can start a motor 31 and utilize a transmission component to indirectly drive a locking gear 35 to rotate to lock or release the door hook B62. The locking mechanism 3 can also allow the locking gear 35 to rotate to release the door hook B62 while temporarily releasing the linkage between the transmission component and the locking gear 35 when the unlocking gear 36 is manually operated.

[0020] The unlocking gear 36 can, while being manually pressed down and twisted, drive the locking gear 35 to rotate to release the door hook B62, and, on the other hand, use the swing rod 37 to tilt the transmission assembly and temporarily disengage the transmission assembly from the locking gear 35 up and down.

[0021] The transmission assembly includes a worm 32, a worm wheel 33 and a transmission gear 34. The worm 32 is installed at the output shaft of the motor 31 and meshes with the worm wheel 33. The transmission gear 34 is coaxially arranged above the worm wheel 33 and can move up and down relative to the worm wheel 33. The worm wheel 33 and the transmission gear 34 can be meshed up and down through the inner recess 331 and the lower protrusion 341. The transmission gear 34 and the unlocking gear 36 are respectively meshed with the locking gear 35. The two ends of the swing rod 37 can swing up and down and are aligned with the transmission gear 34 and the unlocking gear 36 respectively.

[0022] The locking gear 35 has a gap 352 on its teeth to form a short tooth structure. When the door hook B62 is manually unlocked and rotated to the unhooking position, the unlocking gear 36 can be disengaged from the locking gear 35 through the gap 352 and keep the locking gear 35 in place.

[0023] The transmission gear 34 and the unlocking gear 36 can respectively utilize the first elastic member 38 and the second elastic member 39 to automatically return to their original positions after the unlocking gear 36 is released.

[0024] The door hook B62 is provided with a bending portion at the end, and the lock body adopts a shell 1 to accommodate the locking mechanism 3. The shell 1 and the locking gear 35 respectively have a lock hole B12 and a wheel mouth 351 for the bending portion to enter and exit. The lock hole B12 and the wheel mouth 351 can lock the bending portion when they are staggered and release the bending portion when they are opposite to each other.

[0025] The housing 1 further comprises a manual unlocking opening 13 disposed opposite to the unlocking gear 36 , and the unlocking gear 36 comprises a manual operating portion 361 extending out of the housing 1 along the manual unlocking opening 13 .

[0026] The lock head 6 is also provided with a door hook A61, and the lock body adopts a housing 1 to accommodate a door opening and closing mechanism 2, and the door opening and closing mechanism 2 can automatically bite the door hook A61 when the door panel is closed.

[0027] The door hook A61 can enter the housing 1 along the lock hole A11 and is provided with a notch at the end. The door opening and closing mechanism 2 includes a lock block 21 and a third elastic member 22. The lock block 21 can use a pointed protrusion to move in a direction perpendicular to the direction in which the door hook A61 is inserted into the lock hole A11 and compress the third elastic member 22 until the pointed protrusion is stuck in the notch.

[0028] The housing 1 is also provided with a door closing signal switch 4 and a door locking signal switch 5 .

[0029] The transmission gear 34 and the unlocking gear 36 are provided with a first ridge 342 and a second ridge 362, respectively. The housing 1 is provided with a vertical groove that can use the second ridge 362 to guide the unlocking gear 36 to slide vertically. The transmission gear 34 is positioned and guided by the rotating shaft 7. The second ridge 362 can cooperate with the vertical groove to ensure that the unlocking gear 36 can slide vertically normally for a long time, and the transmission gear 34 can use the rotating shaft to ensure reliable rotation and up and down movement; in addition, the first ridge 342 and the second ridge 362 can also play a role in reducing the thickness of the body (of course, the first ridge 342 and the second ridge 362 can also be provided without the first ridge 342 and the second ridge 362 and only the cylindrical structure is used for guidance).

[0030] Working process of the present invention: 1) The opening and closing process of the door opening and closing mechanism 2: like Figure 4As shown, during the door closing process, the door hook A61 is first inserted downward into the housing 1 from the lock hole A11 and gradually squeezes the lock block 21 to the left along the inclined surface of the pointed protrusion (the third elastic member 22 is also compressed at any time) until the pointed protrusion is stuck in the notch (that is, the lock block 21 and the door hook A61 are engaged); during the door opening process, the door hook A61 will move upward along the lock hole A11 and break free from the lock block 21; wherein, the closing force of the door hook A61 to overcome the elastic force and push it into the door lock during the door closing process can be controlled within 20 to 50N, and the opening force of the door hook A61 to overcome the elastic force and pull it out of the door lock during the door opening process can also be controlled within 20 to 50N.

[0031] 2) Electric locking and unlocking process of locking mechanism 3: During the door closing process, the door hook B62 will also be inserted downward into the lock hole B12; at this time, the motor 31 can drive the worm 32 to rotate forward and reverse, and then use the worm 32 to drive the worm wheel 33 and the transmission gear 34 engaged with the worm wheel 33 to rotate forward and reverse, so that the transmission gear 34 drives the locking gear 35 to rotate forward and reverse to achieve the unlocking function (see Figure 6 , the lock hole B12 and the wheel opening 351 are in the unlocked state when facing each other) or locked function (see Figure 7 , the lock hole B12 and the wheel mouth 351 are in a locked state when they are staggered); wherein, for the locking process, after the door lock signal switch 5 is turned on, the motor 31 stops rotating and the door lock is in a locked state; for the unlocking process, after the door lock signal switch 5 is turned off, the motor 31 stops rotating and the door lock is in an unlocked state.

[0032] 3) Manual locking and unlocking process of locking mechanism 3: In the locked state, if the user directly tries to turn the unlocking gear 36, the motor 31 can self-lock to block the multi-stage gear transmission of "unlocking gear 36 → locking gear 35 → transmission gear 34 → worm wheel 33 → worm 32" (i.e. manual unlocking cannot be achieved).

[0033] In the locked state, if the user presses down and turns the unlocking gear 36, the unlocking gear 36 can, on the one hand, use the rocker bar 37 to push up the transmission gear 34 during the downward movement (that is, the transmission gear 34 is temporarily disconnected from the worm gear 33, so that the above-mentioned multi-stage gear transmission will not be transmitted to the motor 31 temporarily), and on the other hand, it can drive the locking gear 35 to rotate to unlock.

[0034] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An emergency unlockable door lock, characterized in that: The invention comprises a lock head (6) provided with a door hook B (62) and a lock body capable of locking or unlocking the door hook B (62) by means of a locking mechanism (3). The locking mechanism (3) can start a motor (31) and indirectly drive a locking gear (35) to rotate by means of a transmission component to lock or release the door hook B (62). The locking mechanism (3) can also, when an unlocking gear (36) is manually operated, cause the locking gear (35) to rotate by itself to release the door hook B (62) while temporarily releasing the linkage between the transmission component and the locking gear (35).

2. The emergency unlockable door lock according to claim 1, wherein: The unlocking gear (36) can, while being manually pressed down and twisted, on the one hand drive the locking gear (35) to rotate to release the door hook B (62), and on the other hand use the swing rod (37) to tilt the transmission assembly and temporarily disengage the transmission assembly from the locking gear (35) up and down.

3. The emergency-unlockable door lock according to claim 2, wherein: The transmission assembly comprises a worm (32), a worm wheel (33) and a transmission gear (34); the worm (32) is mounted on the output shaft of the motor (31) and meshes with the worm wheel (33); the transmission gear (34) is coaxially arranged above the worm wheel (33) and can move up and down relative to the worm wheel (33); the worm wheel (33) and the transmission gear (34) can mesh up and down through an inner concave portion (331) and a lower convex portion (341); the transmission gear (34) and the unlocking gear (36) are respectively meshed with the locking gear (35); and the two ends of the swing rod (37) can swing up and down and are respectively aligned with the transmission gear (34) and the unlocking gear (36).

4. The emergency unlockable door lock according to claim 3, characterized in that: The locking gear (35) is provided with a vacant portion (352) on the teeth to form a short tooth structure, and the unlocking gear (36) can be disconnected from the locking gear (35) through the vacant portion (352) when the door hook B (62) is manually unlocked and rotated to reach the unhooking position, so that the locking gear (35) remains in position.

5. The emergency unlockable door lock according to claim 4, characterized in that: The transmission gear (34) and the unlocking gear (36) can respectively utilize a first elastic member (38) and a second elastic member (39) to automatically return to their original positions after the unlocking gear (36) is released.

6. The emergency unlockable door lock according to claim 4, wherein: The door hook B (62) is provided with a bent portion at the end thereof. The lock body adopts a housing (1) to accommodate the locking mechanism (3). The housing (1) and the locking gear (35) respectively have a lock hole B (12) and a wheel opening (351) for allowing the bent portion to enter and exit. The lock hole B (12) and the wheel opening (351) can lock the bent portion when they are staggered and release the bent portion when they are facing each other.

7. The emergency-unlockable door lock according to claim 4, wherein: The housing (1) further comprises a manual unlocking opening (13) arranged opposite to the unlocking gear (36), and the unlocking gear (36) is provided with a manual operating portion (361) extending out of the housing (1) along the manual unlocking opening (13).

8. The emergency unlockable door lock according to any one of claims 1 to 7, characterized in that: The lock head (6) is also provided with a door hook A (61), and the lock body adopts a housing (1) to accommodate a door opening and closing mechanism (2), and the door opening and closing mechanism (2) can automatically bite the door hook A (61) when the door panel is closed.

9. The emergency unlockable door lock according to claim 8, wherein: The door hook A (61) can enter the housing (1) along the keyhole A (11) and is provided with a notch at the end. The door opening and closing mechanism (2) includes a lock block (21) and a third elastic member (22). The lock block (21) can move along a direction perpendicular to the direction in which the door hook A (61) is inserted into the keyhole A (11) by using the pointed protrusion and compress the third elastic member (22) until the pointed protrusion snaps into the notch.

10. The emergency unlockable door lock according to claim 9, wherein: The housing (1) is further equipped with a door closing signal switch (4) and a door locking signal switch (5).

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