Jack for door lock structure of household appliance, door lock structure and household appliance

Abstract

The present application relates to a kind of top rod of door lock structure for household appliance, door lock structure and household appliance, top rod, including stem, the stem has first end and second end, it is characterized in that, the stem at least partially presents the arc structure of arching towards the line between its first end and second end away from it.The top rod not only generates displacement in horizontal direction when moving forward along its extension trajectory to push door body to open, but also generates larger displacement in vertical direction, to adapt the moving distance of door body in horizontal direction and the moving distance in vertical direction, so that door body does not cause the bending of top rod when opening, and will not affect the hand feeling of opening door.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a top rod of a door lock structure for a household appliance, a door lock structure and a household appliance. BACKGROUND

[0002] For household appliances with a functional inner cavity, such as dishwashers, steam ovens, ovens, etc., due to functional requirements, a door body capable of opening or covering the port of the cabinet is usually provided at the port of the cabinet, and during the use of the cabinet, the door body needs to be locked relative to the cabinet through a door lock structure. For example, a door lock device of a cleaning machine is disclosed in Chinese Utility Model Patent No. CN202022033167.1 (Publication No. CN214006807U). The function of the lock hook of this patent is equivalent to the top rod in the following description. The patent shows a top-opening cleaning machine, and its structure is also applicable to a side-opening cleaning machine.

[0003] For household appliances embedded in a cabinet 6', such as Figures 1-5 As shown in the figure, taking a dishwasher as an example, it includes a front-side open cabinet 1' and a door body 2' rotatably arranged at the front side of the cabinet 1'. The lower end of the door body 2' is rotatably connected to the cabinet 1', and the upper end of the door body 2' can be deflected forward and backward relative to the cabinet 1', thereby opening or closing the opening of the cabinet 1'.

[0004] The door lock structure includes a top rod 3' and a lock hook 5', etc. The top rod 3' is installed at the top of the cabinet 1' and can move forward and backward. The top rod 3' includes a rod body 31' and an extension 32' formed at one end of the rod body 31'. The extension 32' has a lock hole 321' formed therein. The door body 2' is provided with a housing 4'. The housing 4' is provided with a lock opening 41' facing the top rod 3'. The housing 4' is provided with a lock hook 5' capable of being hooked with the lock hole 321' of the top rod 3'. The extension 32' can pass through the lock opening 41' and enter the housing 4' to be locked with the lock hook 5', or the extension 32' can pass out of the housing 4' through the lock opening 41' to be unlocked.

[0005] However, due to the limitation of the installation space between the top of the door body 2' and the top of the cabinet 6', the linear reciprocating motion of the top rod 3' cannot guarantee that the extension 32' of the top rod 3' is in a free state when the door body 2' is opened at a large angle. In actual use, when the door body 2' is opened at a large angle, the extension 32' cooperating with the lock hook 5' will be bent, causing the friction between the bent extension 32' and the lock opening 41' when opening the door, which affects the opening feeling of the door. Moreover, if the door is immediately closed at this position (when the top rod 3' has not been retracted), the extension 32' cannot enter the lock opening 41' area, which may cause the top rod 3' to be abnormally bent and damaged, affecting the service life, and causing the above-mentioned inconvenience in opening and closing the door. The specific reasons are as follows:

[0006] The state that the door body 2' is opened to the state that the upper end of the door body 2' is located outside the cabinet 6' and the upper end of the door body 2' is convenient for the user to touch is called an open door state (as shown in Figure 1 The opening angle of the door body 2' in the open door state is D, Figure 2 The user's hand position is at a of the open door state;

[0007] According to the straight line distance R from the rotation center (the connection between the door body 2' and the hinge) of the door body 2' to the center line of the lock 41' and the angle D, the change distance F of the lock 41' in the horizontal direction and the change distance E in the vertical direction from the closed door state to the open door state can be obtained; F=R*sin(D); E=R-R*cos(D);

[0008] As shown in Figure 1 The top rod 3' is a straight rod, because the door body 2' not only produces displacement in the horizontal direction, but also produces displacement in the vertical direction during the opening process, so the top rod 3' is inclined downward from back to front to adapt to the moving track of the door body 2'. The included angle between the rod body 31' and the top wall surface b' of the box body 1' is A, when the top rod 3' pushes the door body 2' from the closed door state to the open door state, the moving distance of the top rod 3' in the horizontal direction is C, C≈F, the height B of the top rod 3' descending is B=C*tan(A)≈F*tan(A), it can be obtained that B=R*sin(D)*tan(A);

[0009] Due to the space limitation of the top of the dishwasher, A is generally small, so that B is small, much smaller than E, at this time, when the top rod 3' is pushed to the open door position, the extension part 32' will be bent, which affects the opening hand feeling and experience, and reduces the service life of the top rod 3'; and when the door body 2' is completely opened, the extension part 32' is separated from the lock hook 5', the extension part 32' returns to the free state, and the lock 41' cannot match the extension part 32' again. Assuming that D≈10° (this angle is convenient for the user to open the door body 2' from the gap between the top of the door body 2' and the top of the cabinet 6'), A≈2°, E=0.015*R, B=0.006*R, it can be known that B is much smaller than E.

[0010] In order to have a good opening experience and facilitate subsequent closing, B should be approximately equal to E, from the above formula, B can be increased by increasing F or A. If F is increased, E will also be increased, and the ejection distance is too large, the rigidity requirement of the top rod 3' is also improved, so it is not desirable; if A is increased, the top of the dishwasher needs to have enough installation space, so the existing door lock structure needs to be further improved. SUMMARY

[0011] The first technical problem to be solved by the present application is to provide a top rod of a door lock structure for household appliances, which can push the door well.

[0012] The second technical problem to be solved by the present application is to provide a door lock structure using the top rod according to the prior art.

[0013] The third technical problem to be solved by the present application is to provide a door lock structure using the top rod according to the prior art, which can improve the hand feeling of opening the door.

[0014] The fourth technical problem to be solved by the present application is to provide a household appliance using the door lock structure according to the prior art.

[0015] The technical solution adopted by the present application to solve the first technical problem is a top rod of a door lock structure of a household appliance, comprising a rod body, the rod body having a first end and a second end, characterized in that the rod body is at least partially in an arc shape structure arched away from the connecting line between the first end and the second end.

[0016] The rod body can only push the door body by the first end to push the door body open. In order to enable the top rod to also function to lock the door body, the first end of the rod body is provided with an extension portion, and the extension portion is provided with a locking portion, which is a lock rod or a lock tongue or a lock hook. The locking portion can cooperate with a component on the door body to lock the door body when the door body is closed, thereby improving the safety of the household appliance during operation.

[0017] The technical solution adopted by the present application to solve the second technical problem is a door lock structure, characterized in that it comprises the above-mentioned top rod.

[0018] The technical solution adopted by the present application to solve the third technical problem is that the door lock structure further comprises a housing, the housing is located beside the top rod, the top rod can move towards or away from the housing, the first end of the rod body is provided with an extension portion, the extension portion is provided with a locking portion, and the housing is provided with a locking body capable of locking or unlocking the locking portion.

[0019] In order to enable the locking body to lock with the locking portion, the locking body has a locking groove, and the locking portion can be limited in the locking groove or come out of the locking groove.

[0020] One of the cooperation forms of the locking body and the locking portion is that the locking portion is a lock rod, the extension portion is provided with a mouth-shaped lock hole, the columnar body beside the lock hole is the lock rod, the locking body is rotatably arranged on the housing, the locking body is C-shaped to form a locking groove, the opening direction of the lock hole is opposite to the opening direction of the locking groove, and the lock rod can be arranged in the lock hole or separated from the lock hole.

[0021] Another cooperation form of the locking body and the locking part is that the locking part is a hook, a C-shaped slot is formed on the extension part to form the hook, the locking body is rotatably arranged on the shell, the locking body is C-shaped to form a locking slot, the opening direction of the hook is opposite to the opening direction of the locking slot, and the hook can be hooked in the locking slot or be taken out of the locking slot.

[0022] Another cooperation form of the locking body and the locking part is that the locking body includes two oppositely arranged locking arms, one end of each locking arm is directed to the ejector rod, the other end of each locking arm extends away from the ejector rod and is rotatably arranged on the shell, a locking slot is formed between the two locking arms, and the end of each locking arm directed to the locking hole can be closed or opened, at least one of the two locking arms always has a tendency to close to the other locking arm under the action of the elastic member, and the locking part can pass through the spacing between the ends of the two locking arms directed to the locking hole to be limited in the locking slot.

[0023] In the above scheme, one of the structural forms of the locking part is that the end of the extension part is provided with a locking rod, the locking rod and the extension part are connected through a connecting part, the connecting part is perpendicular to the extension direction of the locking rod, the connecting part can pass through the spacing between the ends of the two locking arms directed to the locking hole, and the locking rod can be located in the locking slot and abut against the two locking arms at both ends.

[0024] Another structural form of the locking part is that the locking part is a lock tongue, the lock tongue is shuttle-shaped, and the inner wall surface of the locking arm close to the end thereof is inclined away from the other locking arm in the direction of the lock tongue entering the locking slot.

[0025] The locking body is directly exposed outside the shell, and impurities are easy to erode the locking body, so the locking body is rotatably arranged in the shell, a locking hole penetrating the wall thickness of the shell is formed in the side wall of the shell, and the extension part can pass through the locking hole to enter the shell or pass out of the locking hole to be located outside the shell. Although impurities can also enter the shell from the locking hole, compared with directly exposing the locking body outside, the probability of the locking body being eroded is much smaller, and in addition, the locking hole also plays a certain limiting and guiding role for the track of the ejector rod entering the shell, so that the ejector rod can be well cooperated with the locking body after entering the shell from the locking hole.

[0026] Preferably, the locking hole is conical and gradually shrinks in diameter in the direction of the ejector rod entering the shell. The conical locking hole not only facilitates the extension part to enter, but also can play a certain guiding role for the extension part to cooperate with the locking body when entering the shell.

[0027] Because the rod body is arc-shaped and is not parallel to the center line of the lock opening, if the extension portion is also inclined to the center line of the lock opening, the extension portion is prone to interference with the lock opening when entering the lock opening, therefore, the extension direction of the extension portion is parallel to the center line of the lock opening of the shell, and the line between the first end and the second end of the rod body and the extension portion has an included angle alpha. In this way, the extension portion enters the lock opening in parallel, reducing the probability of interference between the extension portion and the lock opening.

[0028] Preferably, 173° < alpha < 183°.

[0029] The ejector rod can be manually pushed, but this is relatively cumbersome, therefore, for convenient operation, the door lock structure further comprises a driving mechanism connected with the ejector rod driving.

[0030] In order to guide the movement trajectory of the ejector rod, the door lock structure further comprises a containing box, the containing box is provided with a guide rail for guiding the movement trajectory of the ejector rod, the guide rail extends along the length direction of the ejector rod, the ejector rod is movably arranged in the guide rail, and a through hole is formed in the side wall of the containing box and communicates with the guide rail, and the first end of the ejector rod can pass in or out of the through hole. The containing box is not only used to arrange the guide rail to guide the movement trajectory of the ejector rod, but also used to facilitate assembly, that is, the ejector rod is first installed in the containing box, and then the containing box is installed on the household appliance.

[0031] In the above scheme, the first limiting piece and the second limiting piece are arranged in the containing box and spaced apart along the thickness direction of the ejector rod, the first limiting piece and the second limiting piece have a spacing therebetween to form the guide rail, and the rod body has two oppositely arranged first wall surfaces and two oppositely arranged second wall surfaces, and the two first wall surfaces are respectively abutted against the first limiting piece and the second limiting piece.

[0032] In a simple structure, the first limiting piece extends along the length direction of the ejector rod, and the first limiting piece is an arc-shaped wall surface arranged in the containing box; or the first limiting piece extends along the length direction of the ejector rod, and the first limiting piece is a top wall surface arranged in the containing box and being an arc-shaped rib.

[0033] The second limiting piece extends along the length direction of the ejector rod, and the second limiting piece is an arc-shaped wall surface arranged in the containing box; or the second limiting piece extends along the length direction of the ejector rod, and the second limiting piece is a top wall surface arranged in the containing box and being an arc-shaped rib.

[0034] The driving mechanism can have various structural forms, such as a motor and a push rod connected to the motor for driving the push rod to move the ejector rod. However, space is required for the movement of the push rod, and the structure is not compact. Therefore, preferably, the ejector rod is provided with a tooth portion extending along the length direction of the ejector rod, and the driving mechanism comprises a motor and a gear connected to the motor for driving the gear. The gear is directly engaged with the tooth portion or indirectly engaged with the tooth portion through an intermediate gear. The gear and the tooth portion are engaged in a compact structure and occupy a small space.

[0035] Preferably, the tooth portion is arranged on one of the second wall surfaces. In this way, the driving mechanism can be arranged transversely. The vertical space between the top of the household appliance and the cabinet is limited. The driving mechanism has a small vertical space occupation.

[0036] In order to improve the stability of the ejector rod, the two second limit members are arranged on the two sides of one of the first limit members. In this way, the ejector rod is subjected to force at multiple points in the length direction, and the operation is stable.

[0037] In order to reduce the contact area between the ejector rod and the first limit member and the second limit member, and reduce the movement resistance of the ejector rod, the cross section of the first limit member and / or the second limit member is annular, and the axis extends along the width direction of the ejector rod. The connecting line of the center lines of the first limit members is a first arc-shaped line, the connecting line of the center lines of the second limit members is a second arc-shaped line, and the first arc-shaped line and the second arc-shaped line have the same center as the arc-shaped structure of the ejector rod. In this way, the track of the guide rail defined by the first limit member and the second limit member is arc-shaped and matches the arc-shaped structure of the ejector rod.

[0038] In order to further reduce the friction between the first limit member and the second limit member and the ejector rod, at least one of the first limit members is a wheel rotatably mounted on the accommodating box through a first pin shaft extending along the width direction of the ejector rod, and at least one of the second limit members is a wheel rotatably mounted on the accommodating box through a second pin shaft extending along the width direction of the ejector rod.

[0039] In order to further ensure that the track of the guide rail defined by the first limit member and the second limit member is arc-shaped and matches the arc-shaped structure of the ejector rod, the radius of the first limit member and the second limit member is R5, the radius of one of the first wall surfaces is R1, the radius of the other first wall surface is R2, R2 < R1, the radius of the first arc-shaped line is R3, R3 = R1 + R5, the radius of the second arc-shaped line is R4, and R4 = R2 - R5.

[0040] In order to facilitate the installation of the ejector rod in the accommodating box, the accommodating box is formed by two half shells. The first limit member is arranged on one of the half shells, and the second limit member is arranged on the other half shell. In this way, the ejector rod can be installed in one of the half shells, and then the other half shell is closed to achieve the installation of the ejector rod in the accommodating box.

[0041] In order to prevent the ejection rod from moving in the width direction, a limiting slot extending along the length direction of the ejection rod is formed on the first wall surface of the ejection rod, and a first limiting member is arranged in the limiting slot.

[0042] The driving mechanism can have various structural forms, such as a motor and a push rod connected to the motor for driving the push rod to move the ejection rod. However, space for movement of the ejection rod is required, and the structure is not compact. Therefore, preferably, a tooth portion extending along the length direction of the ejection rod is arranged on the ejection rod, the driving mechanism comprises a motor and a gear connected to the motor for driving, and the gear directly engages with the tooth portion or indirectly engages with the tooth portion through an intermediate gear. The gear and the tooth portion engage in a compact structure and occupy a small space.

[0043] Preferably, the tooth portion is arranged on one of the second wall surfaces, so that the driving mechanism can be arranged transversely. The vertical space between the top of the household appliance and the cabinet is limited, and the driving mechanism of the present application occupies a small space in the vertical direction.

[0044] In a compact structure, the tooth portion is arranged on one of the first wall surfaces, and the gear is one of the first limiting members.

[0045] Preferably, the first limiting member and the second limiting member are arranged in the accommodating box close to the through hole. In this way, the side (i.e. the rear side) of the ejection rod away from the through hole is not limited, and the thickness space of the household appliance on the rear side of the ejection rod can be reduced.

[0046] In order to facilitate installation of the driving mechanism on the household appliance, the driving mechanism is arranged in the accommodating box. In this way, the driving mechanism and the ejection rod are directly installed in the accommodating box, and then the accommodating box is installed on the household appliance, which is convenient to install and does not require components of the driving mechanism to be installed on the household appliance one by one.

[0047] In order to limit the movement stroke of the ejection rod, the ejection rod is partially arranged in the accommodating box, first and second limiting blocks are arranged on the ejection rod along the length direction of the ejection rod, and first and second limiting portions are arranged in the accommodating box along the length direction of the ejection rod. In a state where the first limiting block abuts against the first limiting portion, the ejection rod moves to a limit position in a direction away from the shell, and in a state where the second limiting block abuts against the second limiting portion, the ejection rod moves to a limit position towards the shell.

[0048] In order to detect the working state of the ejector rod, a micro switch is arranged in the accommodating box, the ejector rod is provided with a first protrusion and a second protrusion capable of triggering the micro switch, the first protrusion and the second protrusion are arranged at intervals in the length direction of the ejector rod, in the state that the first protrusion triggers the micro switch, the door lock structure is in the locked state; in the state that the second protrusion triggers the micro switch, the door lock structure is in the unlocked state. The micro switch can improve the working safety of the household appliance, and the household appliance can start working again when the micro switch shows that the door body has been locked.

[0049] The driving mechanism can lock the ejector rod, if the driving mechanism does not work, the ejector rod cannot be automatically retracted, a sensor capable of detecting the bending state of the rod body is arranged in the accommodating box or on the ejector rod, the door lock structure further comprises a controller, the sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the driving mechanism. When the door body is opened to the door opening position, if the user does not want to continue to open the door body, the door body can be pressed gently in the door closing direction, the ejector rod will be bent in the process of extruding the door body, the sensor is triggered, and then the controller controls the motor to work, so that the ejector rod is pulled back, and other complex logical controls are omitted, which is more in line with the instinctive operation of the user.

[0050] Preferably, the sensor is a bending degree sensor arranged on the rod body. Because the ejector rod will be bent in the process of extruding the door body, the bending degree sensor is more suitable.

[0051] The household appliance applying the door lock structure solves the fourth technical problem, and the technical scheme is as follows: a household appliance applying the door lock structure, characterized by comprising an appliance main body and a door body, the front side of the appliance main body is open, the lower end of the door body is rotationally connected with the appliance main body, the upper end of the door body can be deflected towards or away from the appliance main body, so that the door body opens or closes the opening of the appliance main body; the ejector rod is arranged on the top of the appliance main body and adjacent to the opening, the arc-shaped structure of the rod body is arched upwards, and the ejector rod can move back and forth relative to the appliance main body along the extension track, and the shell is arranged on the upper part of the door body.

[0052] In order to facilitate the calculation of the bending radius of the rod body, the straight line distance R from the rotation center of the door body to the center line of the lock, the state in which the door body is opened to the state in which the upper end of the door body is located outside the cabinet and the user's hand can touch the upper end of the door body is called the open door state, the opening angle of the door body in the open door state is D, the included angle between the line connecting the first end and the second end of the rod body and the top wall surface of the electric appliance body in the open door state is A', the included angle between the line connecting the first end and the second end of the rod body and the top wall surface of the electric appliance body in the closed door state is A, the bending radius of the arc-shaped structure of the rod body is G, R*sin(D)*tan(A')=R*(1-cos(D)); ((A'-A) / 180)*pi*G*cos(A')=R*sin(D). According to the designed R value and D value, A' can be calculated according to formula one; then A' is input into formula two, and the G value can be calculated.

[0053] Preferably, the moving stroke of the top rod is between 80mm and 110mm, A'<3°, 9°<D<11°, 400mm<R<600mm.

[0054] In the above scheme, the household appliance is a cleaning machine, and the electric appliance body is the box body of the cleaning machine. Of course, the household appliance can also be a steaming box, an oven, etc.

[0055] Compared with the prior art, the advantages of the present application are: 1. In the present application, the rod body of the top rod is designed to be at least partially arc-shaped, so that when the top rod moves forward along its extension track to push the door body to open, not only displacement in the horizontal direction is generated, but also relatively large displacement in the vertical direction is generated, so as to adapt to the moving distance of the door body in the horizontal direction and the moving distance of the door body in the vertical direction, so as to ensure that the top rod can well push the door body and the working reliability is high.

[0056] 2. For the door lock structure provided with the locking body, the locking part on the extension part can cooperate with the locking body to lock the door body, so as to improve the safety of the household appliance during work, and the locking part on the extension part can be unlocked with the locking body, without affecting the opening of the door body. In addition, because the rod body is at least partially arc-shaped, when the door body is opened, the top rod will not be pressed to cause the bending of the top rod, and the feeling of opening the door will not be affected. In addition, when the door body is opened and wants to be closed, the top rod will not interfere with the lock of the shell even if it is not retracted first.

[0057] The door lock structure of the present application, due to the arc-shaped structure design of the top rod, makes the top rod change from linear motion to circular arc motion under the condition of limited installation space, that is, the top rod head descending distance B is increased without affecting the motion of the top rod, and then matches with the lock hole descending height E, improves the door opening feeling and experience, and increases the service life of the top rod; and after the top rod is completely retracted, the rear end is pressed down due to the arc shape, which saves the height space of the installation (this height is the reason why the rod body radius is larger than the lock hole rotation radius, and theoretically, when the radii are consistent, the deformation at any opening position can be completely eliminated).

[0058] 3, When the door lock structure of the present application is applied to household appliances, the door body rotates forward to the open door state, the extension part is always in the shell, that is, the top rod does not deform at the open door position, and there is no friction around the lock hole of the shell, the top rod does not vibrate due to the bending energy storage at the opening moment, and the top rod does not deform due to extrusion after immediately closing the door after opening, which optimizes the door opening feeling experience and improves the service life of the top rod. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 The sectional view of the existing cleaning machine embedded in the cabinet;

[0060] Figure 2 The enlarged view of A of Figure 1

[0061] Figure 3 The schematic diagram of the door body rotating from the closed state to the open state;

[0062] Figure 4 The schematic diagram of the top rod;

[0063] Figure 5 The moving schematic diagram of the top rod moving from the door body closed state to the door body open state;

[0064] Figure 6 The structure schematic diagram of embodiment 1 of the present application;

[0065] Figure 7 The sectional view of Figure 6

[0066] The enlarged view of B of Figure 8 Figure 7 The structure schematic diagram of the door lock structure in

[0067] Figure 9 Figure 6 The structure schematic diagram of the door lock structure in

[0068] Figure 10 The sectional view of the local structure of Figure 9

[0069] Figure 11 The​​​​Figure 9 Structure diagram of one of the half shells of the containing box in

[0070] Figure 12 Structure diagram of one of the half shells of the containing box in Figure 9

[0071] Figure 13 Structure diagram of the other half shell of the containing box in Figure 9

[0072] Figure 14 Structure diagram of the top rod in Figure 9

[0073] Figure 15 Structure diagram of the top rod in another direction in Figure 9

[0074] Figure 16 Second matching form of the locking body and the locking part

[0075] Figure 17 Third matching form of the locking body and the locking part

[0076] Figure 18 Fourth matching form of the locking body and the locking part

[0077] Figure 19 Structure diagram of the top rod

[0078] Figure 20 Structure diagram of the movement of the top rod from the closed state of the door body to the open state of the door body

[0079] Figure 21 Structure diagram of the containing box, the top rod and the driving mechanism of the cleaning machine in embodiment 2 of the present application

[0080] Figure 22 Structure diagram of the containing box, the top rod and the driving mechanism of the cleaning machine in embodiment 2 of the present application Figure 21

[0081] Figure 23 Sectional view of the containing box, the top rod and the driving mechanism of the cleaning machine in embodiment 2 of the present application Figure 22

[0082] Figure 24 Sectional view of the containing box, the top rod and the driving mechanism of the cleaning machine in embodiment 2 of the present application in another direction Figure 22

[0083] Figure 25 Local structure diagram of the containing box, the top rod and the driving mechanism of embodiment 3 of the present application

[0084] Figure 26 Sectional view of the local structure of the containing box, the top rod and the driving mechanism of embodiment 3 of the present application ​​​​​​​

[0085] Figure 27 can be Figure 25 structure diagram of the top rod in the door lock structure. DETAILED DESCRIPTION

[0086] The application will be further described in detail below with reference to the drawings.

[0087] Example 1

[0088] As Figures 6-20 , the household appliance of the preferred embodiment includes an appliance body 1, a door body 2 and a door lock structure A, the front side of the appliance body 1 is open, the lower end of the door body 2 is rotationally connected with the appliance body 1, the upper end of the door body 2 can be deflected towards or away from the appliance body 1, so that the door body 2 opens or closes the opening of the appliance body 1, and the door body 2 and the appliance body 1 are locked by the door lock structure A when the opening of the appliance body 1 is closed by the door body 2.

[0089] The door lock structure A includes a top rod 3, a shell 4, a locking body 5, a containing box 7, a driving mechanism 8 and the like.

[0090] As Figure 8 , 14 , 15, the top rod 3 includes a rod body 31 and an extension 32 provided at the first end of the rod body 31, the extension 32 is provided with a locking part, the rod body 31 is partially in an arc structure 310 which arches away from the connecting line c between the first end and the second end of the rod body 31, the top rod 3 is installed at the top of the appliance body 1 and is arranged adjacent to the opening of the appliance body 1, and the arc structure 310 of the rod body 31 arches upward, and the top rod 3 can move back and forth relative to the appliance body 1 along its extension trajectory under the action of the driving mechanism 8.

[0091] The shell 4 is installed at the upper part of the door body 2, the shell 4 is located at the front side of the top rod 3, the shell 4 is provided with the locking body 5 which can lock or unlock the locking part on the extension 32, and the side wall of the shell 4 is provided with a lock opening 41 which penetrates the wall thickness, the extension 32 can pass through the lock opening 41 to enter the shell 4 or exit the lock opening 41 to be located outside the shell 4.

[0092] In this embodiment, the locking body 5 has a locking groove 51, and the locking part can be limited in the locking groove 51 or come out of the locking groove 51. The locking part is a locking rod 322, the extension 32 is provided with a mouth-shaped lock hole 321, the columnar body beside the lock hole 321 is the locking rod 322, the locking body 5 is rotationally arranged on the shell 4, the locking body 5 is in a C shape to form the locking groove 51, the opening direction of the lock hole 321 is opposite to the opening direction of the locking groove 51, and the locking rod 322 can be arranged in the lock opening 41 or come out of the lock opening 41.

[0093] The shell 4 is provided with a locking assembly, which comprises the locking body 5 and other components such as an elastic member for keeping the locking body 5 always in a state of having the notch of the locking groove 51 upwardly facing the locking rod 322. The locking assembly can adopt an existing structure, and can refer to other door lock structures applied by the applicant. The specific structure of the locking assembly will not be described in detail herein, as long as it can cooperate with the top rod 3 to be locked.

[0094] As shown in Figure 8 , 19 In this embodiment, the extending direction of the extending portion 32 is parallel to the center line of the lock opening 41 of the shell 4, and the line c connecting the first end and the second end of the rod body 31 has an included angle a with the extending portion 32, 173°<a<183°. In this way, the extending portion 32 enters the lock opening 41 in parallel, reducing the probability of interference between the extending portion 32 and the lock opening 41. Of course, the extending portion 32 can also enter the lock opening 41 obliquely, but it is appropriate not to generate friction with the lock opening 41.

[0095] The lock opening 41 is tapered in the direction of the top rod 3 entering the shell 4. The tapered lock opening 41 not only facilitates the entry of the extending portion 32, but also plays a certain guiding role in the cooperation of the extending portion 32 entering the shell 4 with the locking body 5.

[0096] As shown in Figures 8-15 , the top of the box body is provided with a containing box 7, and the containing box 7 is provided with an arc-shaped guide rail 71. The guide rail 71 defines a guide path matched with the shape of the top rod 3, and the guide path is arc-shaped with the same curvature radius as the arc-shaped structure 310 of the top rod 3. The guide rail 71 extends along the length direction of the top rod 3, and the top rod 3 is movably arranged in the guide rail 71. The side wall of the containing box 7 is provided with a through hole 72 in communication with the guide rail 71, and the top rod 3 passes through the through hole 72. The containing box 7 is formed by two half shells 7a, which are a lower half shell of an upper half shell. In this way, after the top rod 3 is installed on one of the half shells 7a, the other half shell 7a is closed to achieve the installation of the top rod 3 in the containing box 7.

[0097] The first limiting member 73 and the second limiting member 74 are arranged in the containing box 7 along the thickness direction of the top rod 3. The first limiting member 73 is arranged on one of the half shells 7a, and the second limiting member 74 is arranged on the other half shell 7a. The first limiting member 73 and the second limiting member 74 have a spacing therebetween to form the guide rail 71. The rod body 31 has two first wall surfaces 3a arranged oppositely and two second wall surfaces 3b arranged oppositely, and the two first wall surfaces 3a respectively abut against the first limiting member 73 and the second limiting member 74.

[0098] In the embodiment, the first limiting member 73 is located above the second limiting member 74, and the first limiting member 73 and the second limiting member 74 both extend along the length direction of the ejector rod 3. The first limiting member 73 is a partial bottom wall surface of the upper half shell, and the second limiting member 74 is a top wall surface in the form of a rib with an arc surface.

[0099] The rib has two ribs, and the two ribs are arranged in the width direction of the ejector rod 3. The two ribs are respectively a first rib 741 and a second rib 742. The first wall surface 3a of the ejector rod 3 is provided with two guide ribs 37 arranged oppositely. The two guide ribs 37 both extend along the length direction of the ejector rod 3, and the two guide ribs 37 are located between the first rib 741 and the second rib 742 and abut against the first rib 741 and the second rib 742 respectively. In this way, the ejector rod 3 cannot move in the width direction.

[0100] The ejector rod 3 is provided with a first limiting block 33 and a second limiting block 34 arranged in the length direction of the ejector rod 3. The accommodating box 7 is provided with a first limiting portion 75 and a second limiting portion 76 arranged in the length direction of the ejector rod 3. In the state that the first limiting block 33 abuts against the first limiting portion 75, the ejector rod 3 moves to the limit position in the direction away from the shell 4. In the state that the second limiting block 34 abuts against the second limiting portion 76, the ejector rod 3 moves to the limit position towards the shell 4. Thus, the movement stroke of the ejector rod 3 is limited.

[0101] In the embodiment, a limiting rib 77 extending along the length direction of the ejector rod 3 is arranged between the first rib 741 and the second rib 742, and the length of the limiting rib 77 is smaller than that of the first rib 741 and the second rib 742. One end of the limiting rib 77 extends into the through hole 72. The first limiting block 33 and the second limiting block 34 are both arranged between the two guide ribs 37 of the ejector rod 3. When the first limiting block 33 abuts against one end of the limiting rib 77, the ejector rod 3 moves to the limit position backwards. When the second limiting block 34 abuts against the other end of the limiting rib 77, the ejector rod 3 moves to the limit position forwards. The one end of the limiting rib 77 is the first limiting portion 75, and the other end of the limiting rib 77 is the second limiting portion 76.

[0102] The driving mechanism 8 is arranged in the accommodating box 7. One of the second wall surfaces 3b of the rod body 31 is provided with a tooth portion 311 extending along the length direction thereof. The driving mechanism 8 includes a motor 81 and a gear 82 drivingly connected with the motor 81. The gear 82 directly engages with the tooth portion 311 or indirectly engages with the tooth portion 311 through an intermediate gear 83. The gear 82 and the tooth portion 311 are engaged in a compact structure, and occupy a small space. The tooth portion 311 is arranged on one of the second wall surfaces 3b. Thus, the driving mechanism 8 can be arranged transversely. The vertical space between the top of the household appliance and the cabinet is limited. The driving mechanism 8 of the present application occupies a small space in the vertical direction.

[0103] A sensor capable of detecting the bending state of the rod body 31 is arranged in the accommodating box 7 or on the top rod 3, and the door lock structure further comprises a controller which can be arranged on the shell 4, the electric appliance body 1 or the door body 2, the sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the driving mechanism 8. In the embodiment, the sensor is a bending degree sensor arranged on the rod body 31.

[0104] When the door body 2 is opened to the open door position, if the user does not want to continue to open the door body 2, the door body 2 can be pressed gently in the closing direction, the top rod 3 will be bent in the process of pressing the door body 2, the bending degree sensor is triggered, and a signal is transmitted to the controller, so that the controller controls the motor 81 to work, and the top rod 3 is pulled back, and then the top rod 3 is locked by extending out of the locking body 5 after the door is closed in place, thereby avoiding other complex logical control and being more in line with the instinctive operation of the user.

[0105] The bending degree sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the motor 81. The electrical connection between the aforementioned components can be in the existing manner, and details are not described herein.

[0106] As shown in Figure 19 , 20 , the radius of the arc-shaped structure 310 of the rod body 31 of the top rod 3 in the embodiment is G;

[0107] The state of the door body 2 when the upper end thereof is located outside the cabinet 6 and the upper end of the door body 2 is convenient for the user to touch is called the open door state, and the opening angle of the door body 2 in the open door state is D relative to the closed door state;

[0108] The rotation angle H is the included angle between the line connecting the first end of the rod body 31 and the center of the rod body 31 in the closed door state and the line connecting the first end of the rod body 31 and the center of the rod body 31 in the open door state;

[0109] The included angle A' between the line c connecting the first end and the second end of the rod body 31 and the top wall surface b of the electric appliance body 1 in the open door state is A', and the included angle A between the line c connecting the first end and the second end of the rod body 31 and the top wall surface b of the electric appliance body 1 in the closed door state is A;

[0110] Wherein, the straight line distance R from the rotation center of the door body 2 to the center line of the lock opening 41.

[0111] Since B=C*tan(A'), C=F, B=R*sin(D)*tan(A') can be obtained

[0112] If it is required that the top rod 3 always enters the shell 4, B=E is required, and R*sin(D)*tan(A')=R*(1-cos(D)) can be obtained;

[0113] Assuming that the moving distance of the extension 32 is approximately a straight line length L in the case of a large radius, then L≈(H / 180)*π*G; L*cos(A')=C=F=R*sin(D); A'=A+H;

[0114] The following two formulas can be finally derived:

[0115] R*sin(D)*tan(A')=R*(1-cos(D));((A'-A) / 180)*π*G*cos(A')=R*sin(D);

[0116] According to the designed R value and D value, A' can be calculated according to Formula One; then A' is input into Formula Two, and the G value can be calculated, so that the engineers can more accurately calculate the bending radius of the rod body 31 according to the installation space of the household appliance.

[0117] The above two formulas can be ignored when the radius G is large, which means that the maximum distance J of the highest point of the rod body 31 relative to the line connecting the first end and the second end is small, that is, J / G≈0, and the error of the above formula can be ignored at this time; generally, J / G<0.01.

[0118] The top rod 3 provided in the embodiment can improve the opening door feel when the door body 2 is opened at a large angle, and the extension 32 of the top rod 3 does not bend, and the lock opening 41 of the shell 4 can still be well matched with the extension 32 of the top rod 3 when the top rod 3 is not retracted after the door is opened.

[0119] In the embodiment, the household appliance is a washing machine capable of washing tableware, and the appliance body 1 is a box body of the washing machine. Of course, the household appliance can also be a steamer, an oven, etc. For the washing machine, the moving stroke of the top rod is generally designed to be between 80mm and 110mm, A'<3°, 9°<D<11°, 400mm<R<600mm, 1000mm≤G≤5000mm, and the installation space of the top rod 3 on the top of the appliance body 1 is less than 30mm in height.

[0120] The second matching form of the locking body 5 and the locking portion is:

[0121] As shown in Figure 16 , the locking portion is a locking hook 323, a C-shaped groove is formed on the extension 32 to form the aforementioned locking hook 323, the locking body 5 is rotatably arranged on the shell 4, the locking body 5 is C-shaped to form a locking groove 51, the opening direction of the locking hook 323 is opposite to the opening direction of the locking groove 51, and the locking hook 323 can be hooked in the locking groove 51 or be pulled out of the locking groove 51.

[0122] The third matching form of the locking body 5 and the locking portion is:

[0123] As Figure 17 shown, the locking body 5 includes two oppositely arranged locking arms 52, one end of the locking arms 52 is towards the top rod 3, the other end extends away from the top rod 3 and is rotatably installed on the shell 4, a locking slot 51 is formed between the two locking arms 52, and the end of the two locking arms 52 towards the lock port 41 can be close or open, at least one of the locking arms 52 always maintains a tendency to close to the other locking arm 52 under the action of the elastic member 53, and the lock catch can be limited in the locking slot 51 by passing through the spacing between the ends of the two locking arms 52 towards the lock port 41.

[0124] The lock catch is a lock rod 322, the end of the extension part 32 is provided with the lock rod 322, the lock rod 322 and the extension part (32) are connected through a connecting part 325, the connecting part 325 is perpendicular to the extension direction of the lock rod 322, the connecting part 325 can pass through the spacing between the ends of the two locking arms 52 towards the lock port 41, and the lock rod 322 can be located in the locking slot 51 and abut against the two locking arms 52 at both ends.

[0125] The fourth matching form of the locking body 5 and the lock catch is:

[0126] As Figure 18 shown, the lock catch is a lock tongue 324, the lock tongue 324 is in the shape of a shuttle, the inner wall surface of the locking arm 52 close to the end thereof is inclined away from the other locking arm 52 in the direction of the lock tongue 324 entering the locking slot 51, and other aspects can refer to the third matching form of the locking body 5 and the lock catch.

[0127] Embodiment 2

[0128] As Figures 21-24 shown, the embodiment is different from the embodiment 1 in the following aspects, and other aspects can refer to the embodiment 1.

[0129] 1. There is at least one first limiting member 73, and there are at least two second limiting members 74 extending in the width direction of the top rod 3. In this embodiment, the first limiting member 73 is located below the second limiting member 74, the first limiting member 73 has one, and the second limiting member 74 has two, and the two second limiting members 74 are located on both sides of the first limiting member 73. The first limiting member 73 and the second limiting member 74 are arranged in the accommodating box 7 close to the through hole 72. In this way, the side (i.e. the rear side) of the top rod 3 away from the through hole 72 does not need to be limited, which can reduce the thickness space of the household appliance on the rear side of the top rod 3.

[0130] The first limiting member 73 and the second limiting member 74 are both circular annular in cross section, and the axis extends along the width direction of the ejector rod 3. The connecting line of the center lines of the first limiting member 73 is a first arc-shaped line, and the connecting line of the center lines of the second limiting member 74 is a second arc-shaped line, both of which are concentric with the arc-shaped structure 310 of the rod body 31. In this way, the track of the guide rail defined by the first limiting member 73 and the second limiting member 74 is an arc-shaped track that is matched with the arc-shaped structure 310 of the ejector rod 3.

[0131] The radius of the first limiting member 73 and the second limiting member 74 is R5, the radius of one of the first wall surfaces 3a is R1, the radius of the other first wall surface 3a is R2, R2 < R1, the radius of the first arc-shaped line is R3, R3 = R1 + R5, the radius of the second arc-shaped line is R4, R4 = R2 - R5.

[0132] The first limiting member 73 and the second limiting member 74 are both rollers, the first limiting member 73 is rotatably installed on the accommodating box 7 through a first pin shaft 731, and the second limiting member 74 is rotatably installed on the accommodating box 7 through a second pin shaft 741, the axis of the first pin shaft 731 and the second pin shaft 741 both extend along the width direction of the ejector rod 3. In this way, the movement resistance of the ejector rod 3 is small, the operation is smooth and stable, the wear between the ejector rod 3 and the first limiting member 73 and the second limiting member 74 is small, the service life is long, the friction noise is reduced, and the user experience is improved.

[0133] The first wall surface 3a of the ejector rod 3 is provided with a limiting groove 38 extending along the length direction thereof, and the first limiting member 73 is arranged in the limiting groove 38, so as to prevent the ejector rod 3 from moving in the width direction thereof.

[0134] In addition, in the embodiment, no limiting ribs are arranged, the first limiting part 75 is a side wall of the accommodating box 7 provided with a through hole 72, and the second limiting part 76 is a limiting block arranged in the accommodating box 7.

[0135] 2. A micro switch 78 is arranged in the accommodating box 7, and the ejector rod 3 is provided with a first protruding part 35 and a second protruding part 36 that can trigger the micro switch 78, the first protruding part 35 and the second protruding part 36 are arranged at intervals in the length direction of the ejector rod 3, in the state that the first protruding part 35 triggers the micro switch 78, the door lock structure is in the locked state, and in the state that the second protruding part 36 triggers the micro switch 78, the door lock structure is in the unlocked state.

[0136] Embodiment 3

[0137] As shown in FIGS. Figure 25 , 26 , 27, the difference between embodiment 3 and embodiment 2 is that:

[0138] One of the first wall surfaces 3a (lower wall surface) of the ejector rod 3 is provided with a tooth portion 311 extending along the length direction thereof, the driving mechanism 8 comprises a motor 81 and a gear 82 connected with the motor 81 in driving mode, the gear 82 is directly engaged with the tooth portion 311, and the gear 82 is the first limiting member. Of course, the tooth portion 311 can also be arranged on the upper wall surface of the ejector rod 3, and in this case, the gear 82 is the second limiting member.

[0139] All the second limiting members 74 are rollers, which are rotatably arranged on the accommodating box 7 through second pin shafts 741, and the axes of the second pin shafts 741 extend along the width direction of the ejector rod 3.

[0140] The number of the first limiting members 73 in the embodiment is one, and if the number of the first limiting members 73 is more than one, the remaining first limiting members 73 are also rollers.

[0141] In the embodiment, the limiting slot 38 is not arranged, but the axial side force of the gear 82 acting on the ejector rod 3 can be balanced by the second limiting members 74, and the ejector rod 3 will not move in the width direction.

[0142] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. Since the disclosed embodiments of the present application can be arranged in different directions, these directional terms are only used as illustrations and should not be regarded as limitations. For example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

Claims

1. A door lock structure for household appliances, comprising a push rod, the push rod including a rod body (31) having a first end and a second end, characterized in that, The rod (31) has at least a partial arcuate structure (310) that arches toward the line (c) connecting its first and second ends away from it; The door lock structure also includes a housing (4), which is located beside the top rod (3). The top rod (3) can move toward or away from the housing (4). The first end of the rod (31) is provided with an extension (32), and the extension (32) is provided with a latch. The housing (4) is provided with a locking body (5) that can lock or unlock with the latch. The door lock structure also includes a drive mechanism (8) connected to the push rod (3) and a housing (7). The housing (7) is provided with a guide rail for guiding the push rod (3). The guide rail extends along the length of the push rod (3). The push rod (3) is movably disposed in the guide rail. The side wall of the housing (7) is provided with a through hole (72) that communicates with the guide rail. The push rod (3) passes through the through hole (72). The housing (7) is formed by two half-shells joined together.

2. The door lock structure according to claim 1, characterized in that: The bending radius of the arc structure (310) of the rod (31) is G, where 1000mm≤G≤5000mm.

3. The door lock structure according to claim 1, characterized in that: The first end of the rod (31) is provided with an extension (32), and the extension (32) is provided with a locking part, which is a locking rod (322), a locking tongue (324), or a locking hook (323).

4. The door lock structure according to claim 1, characterized in that: The locking body (5) has a locking groove (51), and the latch can be limited in the locking groove (51) or disengaged from the locking groove (51).

5. The door lock structure according to claim 4, characterized in that: The locking part is a locking rod (322), and the extension part (32) has an opening-shaped locking hole (321). The columnar body next to the locking hole (321) is the locking rod (322). The locking body (5) is rotatably mounted on the housing (4). The locking body (5) is C-shaped to form a locking groove (51). The opening direction of the locking hole (321) is opposite to the opening direction of the locking groove (51). The locking rod (322) can be inserted into the lock opening (41) or disengaged from the lock opening (41).

6. The door lock structure according to claim 4, characterized in that: The locking part is a locking hook (323). The extension part (32) has a C-shaped groove to form the aforementioned locking hook (323). The locking body (5) is rotatably mounted on the housing (4). The locking body (5) is C-shaped to form a locking groove (51). The opening direction of the locking hook (323) is opposite to the opening direction of the locking groove (51). The locking hook (323) can be hooked into the locking groove (51) or disengaged from the locking groove (51).

7. The door lock structure according to claim 4, characterized in that: The locking body (5) includes two oppositely arranged locking arms (52). One end of each locking arm (52) faces the top rod (3), and the other end extends away from the top rod (3) and is rotatably mounted on the housing (4). A locking groove (51) is formed between the two locking arms (52), and the ends of the two locking arms (52) facing the lock opening (41) can be brought together or opened. At least one locking arm (52) always tends to move towards the other locking arm (52) under the action of the elastic member (53). The latch can pass through the gap between the ends of the two locking arms (52) facing the lock opening (41) and thus be confined within the locking groove (51).

8. The door lock structure according to claim 7, characterized in that: The locking part is a locking rod (322), and the end of the extension (32) is provided with a locking rod (322). The locking rod (322) and the extension (32) are connected by a connecting part (325). The connecting part (325) is perpendicular to the extension direction of the locking rod (322). The connecting part (325) can pass through the gap between the ends of the two locking arms (52) facing the lock opening (41). The locking rod (322) can be located in the locking groove (51) and its two ends abut against the two locking arms (52) respectively.

9. The door lock structure according to claim 7, characterized in that: The latch is a latch (324), which is spindle-shaped. The inner wall surface of the locking arm (52) near its end is inclined away from the other locking arm (52) along the direction in which the latch (324) enters the locking groove (51).

10. The door lock structure according to claim 1, characterized in that: The locking body (5) is located in the housing (4). A locking slot (41) penetrating the wall thickness is provided on the side wall of the housing (4). The extension (32) can pass through the locking slot (41) to enter the housing (4) or exit the locking slot (41) and be located outside the housing (4).

11. The door lock structure according to claim 10, characterized in that: The lock opening (41) is tapered in shape, gradually narrowing in diameter as it enters the housing (4) along the direction of the top rod (3).

12. The door lock structure according to claim 10, characterized in that: The extension (32) extends in a direction parallel to the center line of the lock (41) of the housing (4), and the line (c) connecting the first end and the second end of the rod (31) forms an angle α with the extension (32).

13. The door lock structure according to claim 12, characterized in that: 173°<α<183°。 14. The door lock structure according to claim 1, characterized in that: The guide rail defines a guide path that matches the shape of the push rod (3), and the guide path is an arc with the same radius of curvature as the arc structure (310) of the push rod (3).

15. The door lock structure according to claim 1, characterized in that: The receiving box (7) is provided with a first limiting member (73) and a second limiting member (74) spaced apart along the thickness direction of the top rod (3). The first limiting member (73) and the second limiting member (74) have a gap between them to form the guide rail. The rod body (31) has two first wall surfaces (3a) and two second wall surfaces (3b) arranged opposite to each other. The two first wall surfaces (3a) abut against the first limiting member (73) and the second limiting member (74) respectively.

16. The door lock structure according to claim 15, characterized in that: The first limiting member (73) extends along the length direction of the top rod (3), and the first limiting member (73) is an arc-shaped wall surface provided in the accommodating box (7); or, the first limiting member (73) extends along the length direction of the top rod (3), and the first limiting member (73) is an arc-shaped rib provided in the top wall surface of the accommodating box (7). The second limiting member (74) extends along the length direction of the top rod (3), and the second limiting member (74) is an arc-shaped wall surface provided in the accommodating box (7); or, the second limiting member (74) extends along the length direction of the top rod (3), and the second limiting member (74) is an arc-shaped rib provided in the top wall surface of the accommodating box (7).

17. The door lock structure according to claim 15, characterized in that: The rod (31) is provided with teeth (311) extending along its length direction. The drive mechanism (8) includes a motor (81) and a gear (82) connected to the motor (81) for drive. The gear (82) directly meshes with the teeth (311) or indirectly meshes with the gear (83) through an intermediate gear (83).

18. The door lock structure according to claim 17, characterized in that: The tooth (311) is provided on one of the second wall surfaces (3b).

19. The door lock structure according to claim 15, characterized in that: There is at least one first limiting member (73) and at least two second limiting members (74) extending along the width direction of the top rod (3).

20. The door lock structure according to claim 19, characterized in that: Two second limiting members (74) are located on either side of one of the first limiting members (73).

21. The door lock structure according to claim 19, characterized in that: The cross-section of the first limiting member (73) and / or the second limiting member (74) is circular, and the axis extends along the width direction of the top rod (3). When there is more than one first limiting member (73), the line connecting the center lines of the first limiting member (73) is an arc-shaped first arc line, and the line connecting the center lines of the second limiting member (74) is an arc-shaped second arc line. The first arc line and the second arc line are both concentric with the arc structure (310) of the rod body (31).

22. The door lock structure according to claim 21, characterized in that: At least one of the first limiting members (73) is a wheel, which is rotatably mounted on the receiving box (7) via a first pin (731) extending along the width direction of the top rod (3); at least one of the second limiting members (74) is a wheel, which is rotatably mounted on the receiving box (7) via a second pin (741) extending along the width direction of the top rod (3).

23. The door lock structure according to claim 19, characterized in that: The top rod (3) is provided with teeth (311) extending along its length direction. The drive mechanism (8) includes a motor (81) and a gear (82) connected to the motor (81) for drive. The gear (82) directly meshes with the teeth (311) or indirectly meshes with the intermediate gear (83).

24. The door lock structure according to claim 23, characterized in that: The tooth (311) is provided on one of the second wall surfaces (3b).

25. The door lock structure according to claim 23, characterized in that: The tooth (311) is provided on one of the first wall surfaces (3a), and the gear (82) is one of the first limiting members (73) or the second limiting member (74).

26. The door lock structure according to claim 19, characterized in that: The first limiting member (73) and the second limiting member (74) are both located in the accommodating box (7) near the perforation (72).

27. The door lock structure according to claim 1, characterized in that: The top rod (3) is partially located in the housing (7). The top rod (3) is provided with a first limiting block (33) and a second limiting block (34) spaced apart along its length. The housing (7) is provided with a first limiting part (75) and a second limiting part (76) spaced apart along the length of the top rod (3). When the first limiting block (33) and the first limiting part (75) are in contact, the top rod (3) moves to its limit position in the direction away from the housing (4). When the second limiting block (34) and the second limiting part (76) are in contact, the top rod (3) moves toward the housing (4) to its limit position.

28. The door lock structure according to claim 1, characterized in that: The receiving box (7) is provided with a micro switch (78), and the top rod (3) is provided with a first protrusion (35) and a second protrusion (36) that can trigger the micro switch (78). The first protrusion (35) and the second protrusion (36) are spaced apart in the length direction of the top rod (3). When the first protrusion (35) triggers the micro switch (78), the door lock structure is in a locked state; when the second protrusion (36) triggers the micro switch (78), the door lock structure is in an unlocked state.

29. A household appliance employing the door lock structure described in any one of claims 1 to 28, characterized in that: The appliance includes an electrical body (1) and a door (2). The electrical body (1) has an open front side. The lower end of the door (2) is rotatably connected to the electrical body (1). The upper end of the door (2) can deflect toward or away from the electrical body (1), thereby allowing the door (2) to open or close the open side of the electrical body (1). The top rod (3) is installed on the top of the electrical body (1) and is located near its open side. The arc structure (310) of the rod (31) arches upward. The top rod (3) can move back and forth relative to the electrical body (1) along its extension trajectory. The housing (4) is installed on the upper part of the door (2).

30. The household appliance according to claim 29, characterized in that: The straight-line distance R from the rotation center of the door (2) to the center line of the lock (41), the state when the door (2) is opened to the point where its upper end is outside the cabinet and the user can easily touch the upper end of the door (2) is called the open state. Compared with the closed state, the opening angle of the door (2) in the open state is D. The angle between the line connecting the first end and the second end of the rod (31) in the open state and the top wall of the electrical body (1) is A'. The angle between the line connecting the first end and the second end of the rod (31) in the closed state and the top wall of the electrical body (1) is A. The bending radius of the arc structure (310) of the rod (31) is G. R*sin(D)*tan(A')=R*(1-cos(D)); ((A'-A) / 180)*π*G*cos(A')=R*sin(D).

31. The household appliance according to claim 30, characterized in that: The travel of the push rod (3) is between 80mm and 110mm, A'<3°, 9° <D<11°,400mm<R<600mm。 32. The household appliance according to claim 29, characterized in that: The household appliance is a cleaning machine, and the main body of the appliance (1) is the casing of the cleaning machine.

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