Door lock capable of being unlocked emergently

Abstract

The utility model 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 using 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 using a transmission component. 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 utility model relates to the technical field of door lock, especially the technical field of door lock of emergency unlocking. BACKGROUND

[0002] Household appliances, such as dishwashers or washing machines, usually have a door cover that can open or cover the opening of the box body and a door lock that can lock the box body and the door cover together, so that the door lock can prevent the user from opening the door too early and causing a large amount of water and washed objects to flow out when the appliance is not draining.

[0003] The existing door lock usually uses a motor-driven locking mechanism to achieve locking or unlocking, such as the automobile door lock electric unlocking device disclosed in CN108468486A. However, in an emergency situation, such as a power outage or motor damage, the user may not be able to open the door and remove the unwashed dishes or clothes in time, which may affect the user's normal life, and this problem needs to be solved. SUMMARY

[0004] The utility model aims to solve the problems in the prior art and proposes a door lock that can be unlocked in an emergency. The overall structure is simple, the use is flexible, and the occurrence of the phenomenon that the household appliance cannot be opened in an emergency can be effectively avoided.

[0005] To achieve the above-mentioned purpose, the utility model proposes a door lock that can be unlocked in an emergency, which includes a lock head provided with a door hook B and a lock body that can use a locking mechanism to lock or unlock the door hook B. The locking mechanism can start the motor and indirectly drive the locking gear to rotate to lock or release the door hook B. The locking mechanism can also temporarily release the linkage between the transmission assembly and the locking gear while allowing the locking gear to rotate to release the door hook B when the unlocking gear is manually controlled.

[0006] As a preferred embodiment, the unlocking gear can rotate the locking gear to release the door hook B while lifting the transmission assembly with the swing lever and temporarily disengaging the transmission assembly from the locking gear when it is manually pressed and twisted.

[0007] As a preferred embodiment, the transmission assembly includes a worm, a worm gear, and a transmission gear. The worm is installed on the output shaft of the motor and engages with the worm gear. The transmission gear is coaxially arranged above the worm gear and can move up and down relative to the worm gear. The worm gear and the transmission gear can be engaged by the inner recess and the lower convex part. The transmission gear and the unlocking gear are respectively engaged with the locking gear. The ends of the swing lever can swing up and down and are respectively aligned with the transmission gear and the unlocking gear.

[0008] As preferred, the locking gear is provided with a section of vacancy on the teeth and forms a short-tooth structure with a short section, and the unlocking gear can be disengaged from the locking gear through the vacancy and keep the locking gear in position when the door hook B is manually unlocked and rotated to the unhooking position.

[0009] As preferred, the transmission gear and the unlocking gear can be automatically returned to the original position by the first elastic member and the second elastic member respectively after the unlocking gear is released.

[0010] As preferred, the door hook B is provided with a bent part at the end, the lock body adopts a shell to accommodate the locking mechanism, the shell and the locking gear are respectively provided with a lock hole B and a wheel opening for the bent part to enter, and the lock hole B and the wheel opening can lock the bent part when they are staggered and can release the bent part when they are opposite. The door hook B is provided with a bent part at the end, the shell and the locking gear are respectively provided with a lock hole B and a wheel opening for the bent part to enter, and the lock hole B and the wheel opening can lock the bent part when they are staggered and can release the bent part when they are opposite.

[0011] As preferred, the shell is further provided with a manual unlocking opening opposite to the unlocking gear, and the unlocking gear is provided with a manual operation part extending out of the shell along the manual unlocking opening.

[0012] As preferred, the lock head is further provided with a door hook A, and the lock body adopts a shell to accommodate the door opening and closing mechanism, which can automatically bite the door hook A when the door plate is closed.

[0013] As preferred, the door hook A can enter the shell along the lock hole A and is provided with a notch part at the end, and the door opening and closing mechanism comprises a lock block and a third elastic member, the lock block can move along a direction perpendicular to the insertion of the door hook A into the lock hole A by a sharp protrusion and compress the third elastic member until the sharp protrusion is clamped into the notch part.

[0014] As preferred, the shell is further provided with a door signal switch and a door locking signal switch.

[0015] The beneficial effects of the utility model are as follows:

[0016] By setting 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 assembly to make the driving locking gear reverse and lock or release the door hook B, and in an emergency state, the unlocking gear of the locking mechanism is manually controlled to make the locking gear rotate to release the door hook B and temporarily release the linkage between the transmission assembly and the locking gear, so that the overall structure is simple, the use flexibility is high, and the phenomenon that the household appliance cannot be opened in an emergency state can be effectively avoided; By adopting the worm, the worm wheel and the transmission gear to jointly constitute the transmission assembly, and additionally arranging the swingable swing rod between the transmission gear and the unlocking gear, the worm wheel and the transmission gear can be separated upward by the swing rod when the unlocking gear is pressed down, so that the motor continues to lock the locking gear; And the rotation of the locking gear can be realized simultaneously when the unlocking gear is twisted.

[0017] The features and advantages of the present application will be described in detail with reference to the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective structural schematic view of the lock body of the door lock of the present application which can be unlocked in emergency;

[0019] Figure 2 is a perspective structural schematic view of the lock head of the door lock of the present application which can be unlocked in emergency;

[0020] Figure 3 is a schematic view of the internal structure of the lock body of the door lock of the present application which can be unlocked in emergency;

[0021] Figure 4 is a door opening and closing process diagram of the door opening and closing mechanism of the door lock of the present application which can be unlocked in emergency;

[0022] Figure 5 is an explosion schematic view of the lock body of the door lock of the present application which can be unlocked in emergency when the door opening and closing mechanism, the door closing signal switch and the door locking signal switch are removed;

[0023] Figure 6 is a locking schematic view of the locking mechanism of the door lock of the present application which can be unlocked in emergency;

[0024] Figure 7 is an unlocking schematic view of the locking mechanism of the door lock of the present application which can be unlocked in emergency;

[0025] Figure 8 is a top view of the lock body of the door lock of the present application which can be unlocked in emergency;

[0026] Figure 9 is Figure 8 A-A sectional view of

[0027] Figure 10is the assembly position schematic view of the worm wheel and transmission gear of the door lock of the utility model;

[0028] Figure 11 is the front view of the worm wheel and transmission gear of the door lock of the utility model when the assembly is completed;

[0029] Figure 12 is Figure 11 the B-B sectional view;

[0030] Figure 13 is the three-dimensional structure schematic view of the unlocking gear of the door lock of the utility model.

[0031] In the figure: 1 - shell, 11 - lock hole A, 12 - lock hole B, 13 - manual unlocking port, 2 - door opening and closing mechanism, 21 - lock block, 22 - third elastic member, 3 - locking mechanism, 31 - motor, 32 - worm, 33 - worm wheel, 331 - inner recess, 34 - transmission gear, 341 - lower protruding part, 342 - first protruding rib, 35 - locking gear, 351 - wheel port, 352 - vacancy, 36 - unlocking gear, 361 - manual operation part, 362 - second protruding rib, 37 - swing lever, 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

[0032] Referring to Figures 1 to 13 , the door lock of the utility model, including the lock head 6 provided with the door hook B 62 and the lock body capable of locking or unlocking the door hook B 62 by the locking mechanism 3, the locking mechanism 3 can start the motor 31 and indirectly drive the locking gear 35 to rotate to lock or release the door hook B 62 by the transmission assembly, the locking mechanism 3 can also rotate the locking gear 35 to release the door hook B 62 when the unlocking gear 36 is manually controlled, and temporarily release the linkage between the transmission assembly and the locking gear 35.

[0033] The unlocking gear 36 can rotate the locking gear 35 to release the door hook B 62 on one hand and lift the transmission assembly by the swing lever 37 and temporarily separate the transmission assembly from the locking gear 35 on the other hand during being manually pressed and twisted.

[0034] The transmission assembly comprises 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 engaged 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 engaged up and down through the inner recess 331 and the lower convex part 341, the transmission gear 34 and the unlocking gear 36 are respectively engaged with the locking gear 35, 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.

[0035] The locking gear 35 is provided with a gap 352 on the teeth and forms a short-tooth structure, the unlocking gear 36 can be disengaged from the locking gear 35 through the gap 352 when manually unlocked and rotated to the unhooking position of the door hook B62 and keep the locking gear 35 in place.

[0036] The transmission gear 34 and the unlocking gear 36 can automatically return to the original position after the unlocking gear 36 is released by using the first elastic member 38 and the second elastic member 39.

[0037] The door hook B62 is provided with a bent part at the end, 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 opening 351 for the bent part to enter and exit, the lock hole B12 and the wheel opening 351 can lock the bent part when staggered and release the bent part when opposite.

[0038] The shell 1 also has a manual unlocking opening 13 opposite the unlocking gear 36, the unlocking gear 36 is provided with a manual operation part 361 extending out of the shell 1 along the manual unlocking opening 13.

[0039] The lock head 6 is also provided with a door hook A61, the lock body adopts a shell 1 to accommodate the door opening and closing mechanism 2, the door opening and closing mechanism 2 can automatically engage the door hook A61 when the door plate is closed.

[0040] The door hook A61 can enter the shell 1 along the lock hole A11 and is provided with a notch at the end, the door opening and closing mechanism 2 comprises a lock block 21 and a third elastic member 22, the lock block 21 can move along the direction perpendicular to the insertion of the door hook A61 into the lock hole A11 by using a sharp protrusion and compress the third elastic member 22 until the sharp protrusion is clamped into the notch.

[0041] The shell 1 also installs the door signal switch 4 and the door locking signal switch 5.

[0042] The transmission gear 34 and the unlocking gear 36 are respectively provided with a first protrusion 342 and a second protrusion 362, and the shell 1 is provided with a vertical slot for guiding the vertical sliding of the unlocking gear 36 by the second protrusion 362, and the transmission gear 34 is positioned and guided by the rotating shaft 7. The second protrusion 362 can cooperate with the vertical slot to ensure that the unlocking gear 36 can normally vertically slide for a long time, and the transmission gear 34 can ensure reliable rotation and up-down movement by the rotating shaft; in addition, the first protrusion 342 and the second protrusion 362 can also reduce the thickness (of course, the first protrusion 342 and the second protrusion 362 can not be provided and only a cylindrical structure is used for guiding).

[0043] The working process of the utility model:

[0044] 1) The opening and closing process of the door opening and closing mechanism 2:

[0045] As shown in Figure 4 , in the closing process, the door hook A61 is first inserted into the shell 1 from the lock hole A11 and gradually presses the lock block 21 to the left along the inclined surface of the sharp protruding part (the third elastic member 22 is also compressed at any time) until the sharp protruding part is clamped into the notch part (that is, the lock block 21 is engaged with the door hook A61); in the opening process, the door hook A61 moves upward along the lock hole A11 and breaks away from the lock block 21; wherein the closing force of the door hook A61 into the door lock against the elastic force in the closing process can be controlled at 20-50N, and the opening force of the door hook A61 out of the door lock against the elastic force in the opening process can also be controlled at 20-50N.

[0046] 2) The electric locking and unlocking process of the locking mechanism 3:

[0047] During the closing process, the door hook B62 is also inserted into the lock hole B12; at this time, the motor 31 can drive the worm 32 to rotate forward and backward, and then drive the worm gear 33 and the transmission gear 34 engaged with the worm gear 33 upward and downward to rotate forward and backward, so as to drive the locking gear 35 to rotate forward and backward and realize the unlocking function (see Figure 6 , the lock hole B12 and the wheel opening 351 are in the unlocking state when they are opposite to each other) or the locking function (see Figure 7 , the lock hole B12 and the wheel opening 351 are in the locking state when they are staggered); wherein for the locking process, after the lock signal switch ON of the lock signal switch 5, the motor 31 stops rotating, and the door lock is in the locking state; for the unlocking process, after the lock signal switch OFF of the lock signal switch 5, the motor 31 stops rotating, and the door lock is in the unlocking state.

[0048] 3) The manual locking and unlocking process of the locking mechanism 3:

[0049] In the locked state, if the user directly attempts to turn the unlocking gear 36, the motor 31 can be blocked by the self-locking mechanism, i.e., manual unlocking cannot be achieved.

[0050] In the locked state, if the user presses and turns the unlocking gear 36, the unlocking gear 36 can be used to lift the driving gear 34 upward by the swing lever 37 during the downward movement (i.e., the driving gear 34 is temporarily disconnected from the worm gear 33, so that the multi-stage gear transmission is temporarily not transmitted to the motor 31), and on the other hand, the locking gear 35 is rotated to be unlocked.

[0051] The above embodiments are illustrative of the present application, but not limiting of the present application. Any simple transformation of the present application belongs to the protection scope of the present application.

Claims

1. A door lock that can be opened in an emergency, characterized in that: The lock body 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 using a locking mechanism (3). The locking mechanism (3) can start a motor (31) and indirectly drive a locking gear (35) to rotate to lock or release the door hook B (62). The locking mechanism (3) can also temporarily release the linkage between the transmission assembly and the locking gear (35) while allowing the unlocking gear (36) to be manually operated to rotate the locking gear (35) to release the door hook B (62).

2. The emergency break-glass door latch of claim 1, wherein: The unlocking gear (36) can drive the locking gear (35) to rotate to release the door hook B (62) while lifting the transmission assembly using a swing lever (37) and temporarily separating the transmission assembly from the locking gear (35) during manual pressing and twisting.

3. The emergency break-glass door latch of claim 2, wherein: The transmission assembly comprises a worm (32), a worm gear (33) and a transmission gear (34). The worm (32) is installed at the output shaft of the motor (31) and is engaged with the worm gear (33). The transmission gear (34) is coaxially arranged above the worm gear (33) and can move up and down relative to the worm gear (33). The worm gear (33) and the transmission gear (34) can be engaged up and down through the inner recess (331) and the lower convex part (341). The transmission gear (34) and the unlocking gear (36) are respectively engaged with the locking gear (35). The two ends of the swing lever (37) can swing up and down and are respectively aligned with the transmission gear (34) and the unlocking gear (36).

4. The emergency release door latch defined in claim 3 wherein: The locking gear (35) has a gap (352) on the teeth and forms a short-tooth structure. The unlocking gear (36) can be disengaged from the locking gear (35) through the gap (352) when the door hook B (62) reaches the unhooking position during manual unlocking and rotation, and the locking gear (35) remains stationary.

5. The emergency release door latch defined in claim 4 wherein: The transmission gear (34) and the unlocking gear (36) can automatically return to their original positions after the unlocking gear (36) is released by using the first elastic member (38) and the second elastic member (39) respectively.

6. The emergency break-glass door latch of claim 4, wherein: The door hook B (62) has a bending part at the end. The lock body uses a shell (1) to accommodate the locking mechanism (3). The shell (1) and the locking gear (35) respectively have a lock hole B (12) and a wheel opening (351) for the bending part to enter and exit. The lock hole B (12) and the wheel opening (351) can lock the bending part when they are staggered and can release the bending part when they are opposite.

7. The emergency break-glass door latch of claim 6, wherein: The shell (1) also has a manual unlocking opening (13) opposite the unlocking gear (36). The unlocking gear (36) has a manual operation part (361) extending out of the shell (1) along the manual unlocking opening (13).

8. The emergency break-glass door latch of any one of claims 1 to 7, wherein: The lock head (6) also has a door hook A (61). The lock body uses a shell (1) to accommodate a door opening and closing mechanism (2). The door opening and closing mechanism (2) can automatically bite the door hook A (61) when the door panel is closed.

9. The emergency break-glass door latch of claim 8, wherein: The door hook A (61) can enter the housing (1) along the lock hole A (11) and is provided with a notch portion at the end, the switch door mechanism (2) comprises a lock block (21) and a third elastic member (22), the lock block (21) can be moved along the direction perpendicular to the insertion of the door hook A (61) into the lock hole A (11) by using a sharp protruding portion and compressing the third elastic member (22) until the sharp protruding portion is clamped into the notch portion.

10. The emergency break-glass door latch of claim 9, wherein: The housing (1) is also provided with a door signal switch (4) and a lock door signal switch (5).

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