CN116480230A - Door lock structure for household appliance and household appliance - Google Patents

Abstract

The utility model relates to a door lock structure for a household appliance and the household appliance, wherein the door lock structure comprises a shell, a lock rod, an ejection piece, a lock catch and a first trigger mechanism, wherein the first trigger mechanism is arranged in the shell and is positioned beside a moving path of the ejection piece and is configured to: triggering when the ejector moves along a first direction to enable the lock catch and the lock hook to be mutually buckled; the method is characterized in that: the second trigger mechanism is arranged in the shell and beside the moving path of the ejection piece and is configured to: and the ejection piece is triggered when moving along the first direction to enable the second end of the lock catch to be close to the lock rod but not buckled with the lock hook. The door lock structure can effectively prevent the household appliance from accidentally working due to the failure of one of the trigger mechanisms, and particularly prevent the household appliance from being accidentally opened by a user in a state of not locking the door when the first trigger mechanism is in short circuit, so that the control of the household appliance is safer and more reliable, and the use safety of the user is ensured.

Description

Door lock structure for household appliance and household appliance

Technical Field

The utility model relates to the technical field of household appliances, in particular to a door lock structure for a household appliance and the household appliance.

Background

For household appliances with functional cavities, such as dishwashers, steamers, ovens, etc., due to functional requirements, a door is usually provided at a port of a household appliance housing, which can be opened or covered by the port, and the door needs to be locked relative to the housing during use of the housing.

For example, chinese utility model with patent number ZL202222341119.8 (grant bulletin number CN 218293162U) discloses a door lock structure for a household appliance and a household appliance, wherein the door lock structure is provided with a micro switch beside a pressing block, the micro switch is provided with a contact, the pressing block is provided with a bump, and the bump triggers the contact on the micro switch in a door locking state. Although the micro switch can be touched only when the door is locked, the controller is used for controlling the dish washer to work, so that the use safety and the working reliability of the household appliance are improved.

However, the above patent feeds back whether the lock rod and the lock catch are locked or not through a micro switch, when the micro switch is in short circuit, the controller can consider that the current door lock is always in a door locking state, so that the household appliance can be controlled to work, and once a user carelessly opens the door body in the working process, safety accidents are easy to occur; or when the micro switch is disconnected, the controller can consider that the current door lock is always in a non-locking state, so that the use of the household appliance is affected. Therefore, the door lock structure for the household appliance and the household appliance have lower safety and can be further improved.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a door lock structure for a household appliance, which can ensure the use safety of the household appliance, aiming at the prior art.

The second technical problem to be solved by the present utility model is to provide a household appliance using the door lock structure, which is safer to use.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a door lock structure for a home appliance includes

The shell is used for being connected with the main body of the household appliance, and the wall surface of the shell is provided with a locking notch penetrating through the wall thickness of the shell;

the root of the lock rod is connected with a door body of the household appliance, and the tail end of the lock rod is provided with a lock hook; along with the closing action of the door body, the lock rod moves towards the locking notch, and the moving direction is defined as a first direction; along with the opening action of the door body, the lock rod moves in the direction away from the locking notch, and the moving direction is defined as a second direction; and the lock rod is arranged to pass through the locking port on the shell back and forth along the first direction or the second direction, and penetrates through the locking port to be positioned in the shell in the door locking state, and penetrates out of the locking port to be positioned outside the shell in the unlocking state;

the ejection piece is positioned in the shell and can be arranged in the shell in a back-and-forth moving mode along a first direction and a second direction, and the tail end of the ejection piece is opposite to the tail end of the lock rod and is positioned on the moving path of the lock rod;

a latch located within the housing and having a first end constrained to the end of the ejector and a second end arranged to: the locking rod is positioned at the side of the ejection piece in an unlocking state, and gradually approaches the locking rod until being buckled with the locking hook when the locking rod is propped against the ejection piece along a first direction in the locking process;

a first trigger mechanism disposed within the housing and beside the path of movement of the ejector, the first trigger mechanism configured to: triggering when the ejector moves along a first direction to enable the lock catch and the lock hook to be mutually buckled;

the method is characterized in that: and also comprises

The second trigger mechanism is arranged in the shell and positioned beside the moving path of the ejection piece and is configured to: and the ejection piece is triggered when moving along the first direction to enable the second end of the lock catch to be close to the lock rod but not buckled with the lock hook.

The first trigger mechanism and the second trigger mechanism may have various forms, and preferably, the first trigger mechanism includes a first trigger switch having a first contact point, and the second trigger mechanism includes a second trigger switch having a second contact point, and the second trigger switch and the first trigger switch are sequentially triggered by abutting against the second contact point and the first contact point during the movement of the ejector in the first direction. Of course, triggering modes such as magnetic induction, infrared detection or a sensor can also be adopted.

In order to facilitate triggering of the first trigger switch, the first trigger mechanism further comprises a first button restrained at the front end of the first trigger switch and a first elastic piece arranged between the first button and the first trigger switch, wherein the first elastic piece acts on the first button, so that the first button always keeps a trend of approaching towards the ejection piece.

In order to facilitate triggering of the second trigger switch, the second trigger mechanism further comprises a second button restrained at the front end of the second trigger switch and a second elastic piece arranged between the second button and the second trigger switch, wherein the second elastic piece acts on the second button so as to enable the second button to always keep a trend of approaching towards the ejection piece.

In order to realize the jacking of the door body, the door jacking device comprises a door jacking mechanism arranged in the shell and is configured such that the ejection piece moves along the second direction under the action of the door jacking mechanism in the door opening state.

The driving mechanism can have various structural forms, preferably, the top door mechanism comprises a driving motor and a top door piece connected with the driving motor in a driving way, the tail end of the top door piece is opposite to the ejection piece, and the top door piece can move towards the ejection piece under the driving of the driving motor and further props against the ejection piece to enable the ejection piece to move along the second direction.

In order to detect the state of the door lifting process, the door lifting device further comprises a third trigger mechanism arranged beside the door lifting piece, wherein the third trigger mechanism has the following states:

the first state is triggered in a door opening state that the top door piece moves along the second direction;

the second state is that the trigger is disconnected when the top door piece moves to a state of opening the door in place along the second direction, and the state of opening the door in place corresponds to a state that the lock rod passes through the locking port and is positioned outside the shell;

a third state triggered in a state where the top door moves in a first direction to retract;

and in the fourth state, the trigger is disconnected in the state that the top door piece moves along the first direction to retract to the position.

Preferably, the third trigger mechanism includes a third trigger switch having a third contact, against which the third contact is urged during movement of the top door member in the first direction or the second direction, so that the third trigger switch is triggered.

In order to facilitate triggering of the third trigger switch, the third trigger mechanism further comprises a third button restrained at the front end of the third trigger switch and a third elastic piece arranged between the third button and the third trigger switch, and the third elastic piece acts on the third button to enable the third contact to always keep the trend of approaching towards the top door piece.

The structure of the top door member is various, and preferably, the top door member includes:

the worm is in driving connection with a power output shaft of the driving motor, and is provided with external thread teeth;

the top door frame is hollow, a jack for inserting a worm is formed in the top door frame, an inner thread tooth meshed with the outer thread tooth is arranged on the inner peripheral wall of the jack, and one end, far away from the driving motor, of the top door frame corresponds to the tail end of the top door piece.

Preferably, the middle part of the latch hook is rotatably connected to the housing.

In the above scheme, the locking device further comprises a fourth elastic piece arranged in the shell, wherein the fourth elastic piece acts on the lock catch, so that the upper end of the lock catch always has a tendency of deflecting back to the lock rod.

Preferably, the latch hook is C-shaped, the latch is of a C-shaped structure, the opening direction of the latch is opposite to the opening direction of the C-shaped latch hook, and the ejector is provided with a containing groove for restraining the first end of the latch.

The utility model solves the second technical problem by adopting the technical proposal that: the household appliance with the door lock structure is characterized in that: the household appliance comprises a box body and a door body, wherein the box body is the main body of the household appliance, the door body is the door body of the household appliance, a cavity with one side open is formed in the inner part of the box body, and the door body can be movably arranged at the opening of the box body to open and close the cavity.

To ensure safe use of the household appliance, the household appliance comprises a controller electrically connected with the first trigger mechanism and the second trigger mechanism, and the controller is configured to: when the household appliance is in a non-working state and both the first trigger mechanism and the second trigger mechanism are triggered, the household appliance can be controlled to work; the first triggering mechanism or the second triggering mechanism is not triggered when the household appliance is in the working state, namely the household appliance is controlled to stop working.

Preferably, the household appliance is a washer.

Compared with the prior art, the utility model has the advantages that: the door locking signal is obtained through the first trigger mechanism, and the door closing signal is obtained through the second trigger mechanism, so that the starting work of the household appliance is allowed only when the first trigger mechanism and the second trigger mechanism are triggered, and the stopping work of the household appliance can be controlled when the first trigger mechanism or the second trigger mechanism is not triggered. Therefore, the door lock structure can effectively prevent the household appliance from accidentally working due to the failure of one of the trigger mechanisms, and particularly prevent the user from accidentally opening the household appliance in the state of not locking the door when the first trigger mechanism is in short circuit, so that the control of the household appliance is safer and more reliable, and the use safety of the user is ensured.

Drawings

FIG. 1 is a schematic view of a cleaning machine according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an exploded view of a door lock structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the door lock according to the embodiment of the present utility model in an unlocked state (the rear plate is omitted);

FIG. 5 is another view of the structure of FIG. 4 (with the housing omitted);

fig. 6 is a schematic structural diagram (without a housing) illustrating a door closing operation to a turning point in an embodiment of the present utility model;

fig. 7 is a schematic structural diagram (without housing) of the door closing operation to the door locking point in the embodiment of the present utility model;

FIG. 8 is a schematic view of the housing of FIG. 4;

FIG. 9 is a schematic view of the ejector of FIG. 3 (with the slider omitted);

FIG. 10 is a partial cross-sectional view of FIG. 9;

fig. 11 is a schematic structural diagram of a third trigger mechanism according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

The household appliance in this embodiment includes a case, a door 200, and a door lock structure, the inside of the case has a chamber 300 with one side opened, and the door is movably provided at the opening of the case to open and close the chamber 300, the case being the main body 100 of the household appliance.

The door lock structure can be applied to various household appliances, such as a washer, a washing machine, a refrigerator and the like which can wash dishes and vegetables. In order to fully understand the door lock structure, in this embodiment, the door lock structure is designed in a tub type dishwasher, and the tub type dishwasher having a different structure will be described by taking the tub type dishwasher of the top-open type of fig. 1 to 11 as an example.

As shown in fig. 1 to 11, the door lock structure in this embodiment includes a housing 1, a lock lever 2, an ejector 3, a lock catch 5, a first trigger mechanism 6, and a second trigger mechanism 7.

The casing 1 is adapted to be connected to a main body 100 of a household appliance, and has a wall provided with a locking opening 11 extending through the wall. As shown in fig. 4, the locking notch 11 is opened in the top wall of the housing 1 and penetrates up and down.

The root of the lock rod 2 is used for being connected with a door body 200 of the household appliance, and the tail end of the lock rod 2 is provided with a lock hook 21; with the closing action of the door body, the lock lever 2 moves toward the locking notch 11, defining the moving direction as a first direction; along with the opening action of the door body, the lock rod 2 moves in a direction away from the locking notch 11, and the moving direction is defined as a second direction; and the lock lever 2 is arranged to pass back and forth through the locking notch 11 in the housing 1 in the first direction or the second direction and to penetrate the locking notch 11 to be located inside the housing 1 in the locked state (as shown in fig. 6 and 7) and to penetrate the locking notch 11 to be located outside the housing 1 in the unlocked state (as shown in fig. 4 and 5).

The ejector 3 is located in the housing 1, and the ejector 3 is disposed in the housing 1 so as to be movable back and forth in the first direction and the second direction, and the tip of the ejector 3 is opposite to the tip of the lock lever 2 and is located on the moving path of the lock lever 2. The ejector 3 in this embodiment includes a pressing block 31 located at the top end, a slider 32 located below the pressing block 31, and a push rod 33 disposed between the pressing block 31 and the slider 32 and having both ends connected to the pressing block 31 and the slider 32, respectively.

The casing 1 is also provided with a fifth elastic member 4 acting on the ejector member 3, in this embodiment, the fifth elastic member 4 is a torsion spring, two torsion springs are symmetrically arranged at two sides of the push rod 33 respectively, each torsion spring comprises a freely suspended winding unit 41, and a first torsion arm 42 and a second torsion arm 43 which are respectively formed by extending from two ends of the winding unit 41, the winding unit 41 is positioned at the side of the push rod 33, the first torsion arm 42 is restrained on the casing 1, the second torsion arm 43 is restrained on the sliding block 32, in an unlocking state, the torsion spring keeps the sliding block 32 to move along a second direction, and the pressing block 31 moves along the second direction under the action of the fifth elastic member 4 and abuts against the locking notch 11 of the casing 1 (as shown in fig. 4 and 5), as shown in fig. 9, the back of the pressing block 31 is provided with a sliding block 311, the casing 1 is provided with a sliding chute 111 which is vertically arranged adjacent to the locking notch 11 and is used for sliding the sliding of the sliding block 311, thus the pressing block 31 can be ensured to move stably, the pressing block 31 also comprises a door lock 35, the pressing block 31 is sleeved on the door lock seal 35, and the pressing block 31 abuts against the locking notch 11 (as shown in the sealing state of the sealing port 11) under the sealing port 11 of the casing 1); the water is prevented from splashing into the door lock in the case of the door body being opened, and the torsion spring keeps the slider 32 in a tendency to move in the first direction in the door-locked state.

Since the door lock structure generally involves electric components, in order to improve the water resistance, a partition plate 12 for partitioning the inner space of the housing 1 into a first chamber 1a and a second chamber 1b which are relatively independent is provided in the center of the housing 1, as shown in fig. 8, the first chamber 1a is an upper half part of the housing 1, the second chamber 1b is a lower half part of the housing 1, a lock catch 5 and a pressing block 31 are provided in the first chamber 1a, a water outlet 10 is provided at the bottom of the first chamber 1a, a sliding block 32 is provided in the second chamber 1b, a through hole 121 for inserting a push rod 33 is provided in the partition plate 12, and a sealing ring 34 for sealing connection with the through hole 121 is sleeved outside the push rod 33. In order to improve the sealing effect, as shown in fig. 8, the push rod 33 is rod-shaped in the present embodiment, and the inner peripheral wall of the sealing ring 34 is provided with at least one ring of reinforcing ribs 341, and is distributed at intervals in the axial direction of the sealing ring 34. The upper surface of the reinforcing rib 341 is inclined gradually upward from the outside to the inside so as to abut against the outer wall of the push rod 33.

The catch 5 is located within the housing 1, a first end of the catch 5 being constrained to the end of the ejector 3, and a second end of the catch 5 being arranged to: is positioned beside the ejection piece 3 in an unlocking state, and gradually approaches the lock rod 2 until being buckled with the lock hook 21 when the lock rod 2 abuts against the ejection piece 3 along a first direction in the locking process; in the present embodiment, the middle part of the latch hook 21 is rotatably connected to the housing 1; the lock catch further comprises a fourth elastic piece 13 arranged in the shell 1, the fourth elastic piece 13 acts on the lock catch 5 to enable the upper end of the lock catch 5 to always have a tendency of deflecting back to the lock rod 2, and the fourth elastic piece 13 adopts a torsion spring.

As shown in fig. 3, the latch hook 21 in the present embodiment is C-shaped, the latch 5 is in a C-shaped structure, and the opening direction is opposite to the opening direction of the C-shaped latch hook 21, and the ejector 3 has a receiving groove 30 for restraining the first end of the latch 5, so that the receiving groove 30 on the ejector 3 can be finally abutted against the first end of the latch 5 in the process of pushing the lock rod 2 to move down along the first direction, and the second end of the latch 5 gradually deflects toward the lock rod 2 until the second end is buckled with the latch hook 21 in the process of continuing to move down along the first direction of the lock rod 2.

The first triggering mechanism 6 and the second triggering mechanism 7 are both disposed in the housing 1 and are both located beside the moving path of the ejector 3, and the first triggering mechanism 6 is configured to: the ejector 3 is triggered when it moves in the first direction to bring the shackle 5 and the shackle 21 into engagement with each other; the second trigger mechanism 7 and is configured to: when the ejector 3 moves in the first direction to bring the second end of the catch 5 toward the lock lever 2 but not yet engaged with the latch hook 21, it is triggered. As shown in fig. 6, the second triggering mechanism 7 is located above the first triggering mechanism 6, so that the first triggering mechanism 6 can be triggered when the door body 100 is closed but not yet buckled with the latch hook 21, and the second triggering mechanism 7 can be triggered when the ejector 3 moves down along the first direction and the latch 5 and the latch hook 21 are buckled with each other, so that double safety can be achieved.

In this embodiment, the first trigger mechanism 6 and the second trigger mechanism 7 have the same structure, and both adopt: the first trigger mechanism 6 includes a first trigger switch 61 having a first contact, a first button 62 restrained at the front end of the first trigger switch 61, and a first elastic member 63 provided between the first button 62 and the first trigger switch 61, the first elastic member 63 acting on the first button 62 so as to keep the first button 62 always in a tendency toward the ejector 3; the second trigger mechanism 7 includes a second trigger switch 71 having a second contact, a second button 72 restrained at the front end of the second trigger switch 71, and a second elastic member 73 provided between the second button 72 and the second trigger switch 71, the second elastic member 73 acting on the second button 72 so that the second button 72 always maintains a tendency toward the ejector 3; the ejector 3 sequentially abuts against the first button 62 and the second button 72 during the movement of the ejector 3 in the first direction, so that the second trigger switch 71 and the first trigger switch 61 are sequentially triggered. The first elastic member 63 and the second elastic member 73 are both spring, so that the first button 62 and the second button 72 always keep a forward extending state through the elasticity of the spring, so that the contact space between the first triggering mechanism 6 and the second triggering mechanism 7 and the ejection member 3 can be respectively compensated, the contact efficiency can be improved, the buffer effect can be achieved, and the elastic members are compressed when the first button 62 and the second button 72 respectively prop against the ejection member 3 through the corresponding elastic members, so that the corresponding contacts are triggered by the buttons, and the triggering of the trigger switch can be realized.

In order to realize automatic door opening of the household appliance, the door opening device further comprises a door pushing mechanism 8 arranged in the shell 1 and is configured such that the ejection member 3 moves along the second direction under the action of the door pushing mechanism 8 in the door opening state. The top door mechanism in this embodiment includes a driving motor 81 and a top door member 80 connected with the driving motor 81 in a driving manner, wherein the end of the top door member 80 is opposite to the ejection member 3, and the top door member 80 can move towards the ejection member 3 under the driving of the driving motor, and further abuts against the ejection member 3 to move the ejection member 3 along the second direction.

In this embodiment, the top door member 80 includes a worm 801 and a top door frame 802, the worm 801 is in driving connection with a power output shaft of the driving motor 81, and external thread teeth 801a are provided on the worm 801; the top door frame 802 is internally provided with an insertion hole 802a for inserting the worm 801, the inner peripheral wall of the insertion hole 802a is provided with an internal thread tooth meshed with the external thread tooth 801a, and one end of the top door frame 802 far away from the driving motor 81 is correspondingly the tail end of the top door member 80.

In addition, in order to realize the controlled opening of the door mechanism 8 and the retraction after the opening of the door in place, the door opening device further comprises a third trigger mechanism 9 arranged beside the door top 80, and the third trigger mechanism 9 has the following states:

state one, triggered in the open state in which the top door member 80 moves in the second direction;

the second state is that the trigger is turned off when the top door member 80 moves to a state of opening the door in place along the second direction, and the state of opening the door in place corresponds to a state that the lock rod 2 passes through the locking port 11 and is positioned outside the shell 1;

state three, triggered in a state where the top door 80 is retracted by moving in the first direction;

state four, the trigger is turned off in a state where the top gate 80 is retracted by moving in the first direction.

In this embodiment, the third trigger mechanism 9 includes a third trigger switch 91 having a third contact, a third button 92 constrained at the front end of the third trigger switch 91, and a third elastic member 93 disposed between the third button 92 and the third trigger switch 91, the third elastic member 93 acting on the third button 92 to keep the third contact always against the third contact in the moving down of the top door 80 in the first direction or the second direction, so that the third trigger switch 91 is triggered.

As shown in fig. 5 to 7, the second trigger mechanism 7, the first trigger mechanism 6 and the third trigger mechanism 9 are respectively arranged in the second chamber 1b from top to bottom at intervals, a clamping groove 1c for clamping a button corresponding to the front end of each trigger mechanism is further formed in the back of the second chamber 1b, and the driving motor 81 is also arranged in the second chamber 1b, so that the safety of the electrical equipment can be ensured by separating the three trigger mechanisms from the first chamber 1a and the electrical equipment is prevented from being burnt out due to water inlet. In addition, the first trigger switch 61, the second trigger switch 71 and the third trigger switch 91 are all dampproof switches, so that the water can be further prevented from being burnt out.

Wherein the household appliance comprises a controller electrically connected to the first trigger mechanism 6 and the second trigger mechanism 7, the controller being configured to: when the household appliance is in a non-working state and the first trigger mechanism 6 and the second trigger mechanism 7 are triggered, the household appliance can be controlled to work; the first triggering mechanism 6 or the second triggering mechanism 7 is not triggered when the household appliance is in the working state, namely the household appliance is controlled to stop working.

The controller is of course also electrically connected to the drive motor 81 and the third triggering mechanism 9, so that the corresponding control of the household appliance can be performed automatically by the controller in dependence on the triggering signal of the third triggering mechanism 9.

In this embodiment, the door lock has three sets of signals, namely: the second trigger mechanism acquires a door closing signal, the first trigger mechanism acquires a door locking signal, and the third trigger mechanism acquires a working state signal of the top door mechanism;

in the initial state of the door lock, as the lock rod 2 is not inserted into the locking notch 11, the pressing block 31 is not compressed, the sliding block 32 is not moved, the sliding block 32 is at the uppermost under the action of the double torsion springs (namely, the two fifth elastic pieces 4), at the moment, the second triggering mechanism and the first triggering mechanism are not triggered (the default triggering switch is a normally open switch, namely, the triggering switch when not triggered is in an open state, or a normally closed switch can be adopted, and the triggering switch when not triggered is in a closed state); at the moment, the cleaning machine is not started by pressing the start key, and only when the second trigger mechanism and the first trigger mechanism are in a closed state, the cleaning machine can be operated by pressing the start key; meanwhile, in the circuit design process, the signal output end of the first trigger mechanism is connected with the working control end of the cleaning machine in series, and when the door body is forcedly opened, the cleaning machine stops working immediately, so that a protection effect is achieved;

door closing state: when the door body is in a closed state, the lock rod 2 is inserted into the locking opening 11, the pressing block 31 moves downwards under the pushing of the lock rod 2, the torsion spring force acting on the lock hook 21 is from 0 to 0, when the torsion spring acting on the lock hook 21 reaches a turning point, the acting force of the lock hook 21 is 0, at the moment, the second triggering mechanism is triggered (namely, the door closing signal is closed), the first triggering mechanism is not triggered (namely, the door locking signal is disconnected), the pressing block 31 continues to move downwards, the lock hook 21 is turned over under the action of the torsion spring to be buckled with the lock catch 5, meanwhile, the sliding block 32 moves downwards, and the first triggering mechanism is triggered, namely: the door locking signal is changed from open to closed, and at the moment, the door closing signal and the door locking signal are both closed, so that the cleaning machine can work.

After the cleaning machine finishes working, the door body is in a closed state, the door body can be opened through an automatic or manual operation panel button, at the moment, the driving motor 81 works to drive the worm 801 to rotate, the top door frame 802 is jacked up, the top door frame 802 moves upwards against the sliding block 32 to realize door opening, at the moment, the signal of the third triggering mechanism 9 is changed from open to closed, the lock hook returns to an initial state under the action of the lock catch, the pressing block 31 moves upwards to also return to the initial state, at the moment, the door closing signal and the door locking signal are both disconnected, the cleaning machine cannot perform cleaning work, and only tableware drying can be performed (no potential safety hazard). When the cleaning machine finishes opening the door, the sliding block 32 is positioned at the uppermost part, at the moment, the signal of the third trigger mechanism 9 is changed from closed to open, the door opening can be judged to be in place through the signal of the third trigger mechanism 9, the driving motor 81 is reversed to retract the top door frame 802, at the moment, the signal of the third trigger mechanism 9 is changed from open to closed, after the top door frame 802 is in place, the signal of the third trigger mechanism 9 is changed from closed to open, and at the moment, the pressing block 31 prevents the door body 100 from moving downwards under the action of the double torsion springs.

Because the detection of the locked-rotor current of the motor requires judgment time, the damage to the motor is larger, and the service life of the motor is shortened, the embodiment adopts the third trigger mechanism 9 to detect the position signal instead of detecting the locked-rotor current, and places the position signal before the locked-rotor of the motor, thereby protecting the current. Meanwhile, the high-temperature locked-rotor current is affected by the ambient temperature, if the high-temperature locked-rotor current is reduced, the low-temperature running current is increased, and when the two values are relatively close, false alarm is easily caused by judging the locked-rotor current.

If the cleaning machine is powered off in the running process, the door can be opened by forcibly pulling the door, at the moment, the door closing signal and the door locking signal are disconnected, the dish washer cannot work after the incoming call, and the safety is ensured.

The door lock in this embodiment can only operate when both the door closing signal and the door locking signal are closed. When the door closing signal or the door locking signal is broken, the cleaning machine cannot work, and safety is guaranteed. When the door closing signal is short-circuited, only if the lock rod 2 is inserted into the locking opening 11, the lock catch 5 and the lock hook 21 are mutually buckled, namely, when the door closing signal is closed, the cleaning machine can work; when the lock rod 2 is not inserted into the locking opening 11, the door body of the cleaning machine is not completely closed, the sliding block 32 cannot reach the lowest position, namely, a locking door signal is disconnected, and the cleaning machine cannot work at the moment; when the door locking signal is short-circuited, only the lock rod 2 is inserted into the locking opening 11, the lock catch 5 and the lock hook 21 are mutually buckled, namely, the double torsion springs provide upward force to not jack up the lock hook, the door closing signal is closed, and the cleaning machine can work.

In the embodiments of the present utility model, since the top-open type cleaning machine is taken as an example, in the description and claims of the present utility model, the terms "upper", "lower", "left", "right", "side", etc. are used, but these terms merely indicate relative positional relationships, and are not limited to absolute directions, for example, "upper" and "lower" are not limited to directions opposite to or coincident with the direction of gravity, but are mainly relative to the direction of movement of the door body.

In fact, the structure of the utility model can be equally applied to a cleaning machine with a side-opening door body and other appliances, and the azimuth word in the text should be taken as an adaptive understanding.

Claims (16)

1. A door lock structure for a home appliance includes

The shell (1) is used for being connected with the main body (100) of the household appliance, and the wall surface of the shell is provided with a locking opening (11) penetrating through the wall thickness of the shell;

the root of the lock rod (2) is connected with a door body (200) of the household appliance, and the tail end of the lock rod is provided with a lock hook (21); with the closing action of the door body, the lock rod (2) moves towards the locking opening (11), and the moving direction is defined as a first direction; along with the opening action of the door body, the lock rod (2) moves in a direction away from the locking port (11), and the moving direction is defined as a second direction; and the lock rod (2) is arranged to pass through the locking opening (11) on the shell (1) back and forth along the first direction or the second direction, penetrates the locking opening (11) to be positioned in the shell (1) in a door locking state, and penetrates out of the locking opening (11) to be positioned outside the shell (1) in an unlocking state;

the ejection piece (3) is positioned in the shell (1) and is arranged in the shell (1) in a mode of being capable of moving back and forth along a first direction and a second direction, and the tail end of the ejection piece (3) is opposite to the tail end of the lock rod (2) and is positioned on the moving path of the lock rod (2);

a catch (5) located within said housing (1), a first end of which is constrained to the end of said ejector (3), and a second end of which is arranged to: is positioned at the side of the ejection piece (3) in an unlocking state, and gradually approaches the lock rod (2) until being buckled with the lock hook (21) when the lock rod (2) is propped against the ejection piece (3) along a first direction in the locking process;

a first trigger mechanism (6) provided in the housing (1) and located beside the movement path of the ejector (3), the first trigger mechanism (6) being configured to: when the ejector (3) moves along a first direction to enable the lock catch (5) and the lock hook (21) to be mutually buckled, the ejector is triggered;

the method is characterized in that: and also comprises

A second trigger mechanism (7) which is arranged in the shell (1) and is positioned beside the moving path of the ejection piece (3) and is configured to: when the ejector (3) moves along the first direction to enable the second end of the lock catch (5) to approach the lock rod (2) but not be buckled with the lock hook (21).

2. The door lock structure for a home appliance according to claim 1, wherein: the first triggering mechanism (6) comprises a first triggering switch (61) with a first contact, the second triggering mechanism (7) comprises a second triggering switch (71) with a second contact, and the second triggering switch (71) and the first triggering switch (61) are triggered sequentially when the ejection piece (3) moves along a first direction and sequentially abuts against the second contact and the first contact.

3. The door lock structure for home appliances as claimed in claim 2, wherein: the first trigger mechanism (6) further comprises a first button (62) restrained at the front end of the first trigger switch (61) and a first elastic piece (63) arranged between the first button (62) and the first trigger switch (61), and the first elastic piece (63) acts on the first button (62) so that the first button (62) always keeps a trend of approaching the ejection piece (3).

4. A door lock structure for a home appliance as claimed in claim 3, wherein: the second trigger mechanism (7) further comprises a second button (72) restrained at the front end of the second trigger switch (71) and a second elastic piece (73) arranged between the second button (72) and the second trigger switch (71), and the second elastic piece (73) acts on the second button (72) so as to enable the second button (72) to always keep the trend of approaching the ejection piece (3).

5. The door lock structure according to claim 1, wherein: the device also comprises a top door mechanism (8) arranged in the shell (1) and is configured such that the ejection piece (3) moves along a second direction under the action of the top door mechanism (8) in a door opening state.

6. The door lock structure according to claim 5, wherein: the top door mechanism comprises a driving motor (81) and a top door piece (80) which is in driving connection with the driving motor (81), the tail end of the top door piece (80) is opposite to the ejection piece (3), and the top door piece (80) can move towards the ejection piece (3) under the driving of the driving motor and further abuts against the ejection piece (3) to enable the ejection piece (3) to move along the second direction.

7. The door lock structure according to claim 6, wherein: the door further comprises a third trigger mechanism (9) arranged beside the top door piece (80), and the third trigger mechanism (9) has the following states:

state one, in the door opening state that the said top door piece (80) moves along the second direction, is triggered;

the second state is that the trigger is disconnected when the top door piece (80) moves to a state of opening the door in place along the second direction, and the state of opening the door in place corresponds to a state that the lock rod (2) passes through the lock opening (11) and is positioned outside the shell (1);

state three, triggered in a state in which the top door (80) is retracted by moving in a first direction;

and a fourth state, wherein the trigger is turned off in a state that the top door (80) moves along the first direction and is retracted.

8. The door lock structure according to claim 7, wherein: the third trigger mechanism (9) comprises a third trigger switch (91) with a third contact, against which the third trigger switch (91) is triggered during movement of the top door (80) in the first direction or the second direction.

9. The door lock structure according to claim 8, wherein: the third trigger mechanism (9) further comprises a third button (92) restrained at the front end of the third trigger switch (91) and a third elastic piece (93) arranged between the third button (92) and the third trigger switch (91), and the third elastic piece (93) acts on the third button (92) so that the third contact always keeps a trend of approaching to the top door piece (80).

10. The door lock structure according to claim 9, wherein: the top door (80) comprises:

the worm (801) is in driving connection with a power output shaft of the driving motor (81), and external thread teeth (801 a) are arranged on the worm (801);

the top door frame (802) is hollow, a jack (802 a) for inserting the worm (801) is formed in the inside of the top door frame, internal thread teeth meshed with the external thread teeth (801 a) are formed in the inner peripheral wall of the jack (802 a), and one end, far away from the driving motor (81), of the top door frame (802) corresponds to the tail end of the top door piece (80).

11. The door lock structure according to any one of claims 1 to 10, wherein: the middle part of the latch hook (21) is rotatably connected to the housing (1).

12. The door lock structure according to claim 11, wherein: the lock catch also comprises a fourth elastic piece (13) arranged in the shell (1), wherein the fourth elastic piece (13) acts on the lock catch (5) so that the upper end of the lock catch (5) always has a tendency of deflecting back to the lock rod (2).

13. The door lock structure according to claim 12, wherein: the lock hook (21) is C-shaped, the lock catch (5) is of a C-shaped structure, the opening direction of the lock catch is opposite to the opening direction of the C-shaped lock hook (21), and the ejection piece (3) is provided with a containing groove (30) for restraining the first end of the lock catch (5).

14. Household appliance applying a door lock structure according to any of the previous claims 1 to 13, characterized in that: the household appliance comprises a box body and a door body, wherein the box body is the main body (100) of the household appliance, the door body is the door body (200) of the household appliance, a cavity (300) with one side open is formed in the box body, and the door body can be movably arranged at the opening of the box body to open and close the cavity (300).

15. A household appliance as in claim 14, wherein: the household appliance comprises a controller electrically connected to the first trigger mechanism (6) and the second trigger mechanism (7), the controller being configured to: when the household appliance is in a non-working state and the first trigger mechanism (6) and the second trigger mechanism (7) are triggered, the household appliance can be controlled to work; the first triggering mechanism (6) or the second triggering mechanism (7) is not triggered when the household appliance is in the working state, namely the household appliance is controlled to stop working.

16. A household appliance as in claim 15, wherein: the household appliance is a cleaning machine.