CN218117492U - 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 top rod; locking; the locating element can be movably arranged in the shell, the locating element is always abutted to the lock catch to limit the rotation of the lock catch, and the direction of the force exerted on the lock catch by the locating element is opposite to the rotation direction of the lock catch in at least a local process of the lock catch rotating from a locking state to an unlocking state. The utility model discloses a make the hasp rotate to the at least local in-process of unblock state from the locking state, the direction of the direction that the setting element exerted on the hasp is opposite with the rotation direction of hasp, and like this, when opening the door, the power that the hasp needs to overcome is great, and the user is when opening the door, because the power that needs to exert is great, so the door body can not be opened completely easily at once, and the process of opening the door is more stable, and the security is good; and because the door opening force is large, the door body is not easy to be opened by mistake.

Description

Door lock structure for household appliance and household appliance

Technical Field

The utility model relates to the technical field of household appliances, concretely relates to a lock structure and household appliances for household appliances.

Background

For the box body with the functional inner cavity, due to functional requirements, a door body capable of opening or covering the port is usually arranged at the port of the box body, and the door body needs to be locked relative to the box body in the using process of the box body.

For example, the chinese utility model patent application CN200410043122.5, door opening and closing mechanism and dish washing machine having the same (application publication No. CN 1550202A) discloses a structure comprising: a door rotatably disposed for opening and closing a dish inlet provided in the dish washing machine, and a rotation assisting mechanism for applying a rotation assisting force to the door in accordance with a rotation operation of the door; the rotation assisting mechanism applies a rotation assisting force to the door in a closing direction when the door is in a predetermined angle range from a closed state. Although the door body can be locked on the dish washing machine, the locking structure is complex, the dependence on electric parts and control modes is high, the action logic of the door lock is complex, faults are easy to occur, and the reliability is low.

In order to solve the problems, the invention discloses a door lock structure for an electric appliance and a cleaning machine applying the door lock structure, which is disclosed in the patent application of the Chinese utility model with the patent number of CN201910933576.6 (the publication number of CN 112576111A), and comprises a shell, a lock rod, an ejecting part, a lock catch and a driving mechanism, when a door body is closed, the door body can be downwards abutted to press the ejecting part, the ejecting part drives the lower end of the lock catch to downwards move, so that the upper end of the lock catch of a C-shaped structure deflects towards the upper part of the ejecting part to be buckled with a C-shaped lock hook at the lower end of the lock rod, and the self-locking of the door body is realized; and the door lock structure of the patent is realized by a mechanical structure, has low requirements on electric control logic and high reliability, and can reliably realize door opening and closing.

If the lock catch is easy to rotate when the door is opened, the door body can be easily opened, the door body is suddenly and completely opened, the hot steam in the liner easily blows out from the surface in a large area, a user is easily scalded, and the safety is poor. For household appliances with built-in dangerous objects, such as cleaning machines, ovens and the like, good door closing force should be as small as possible to facilitate the user to close the door, and good door opening force should be as large as possible to ensure the door locking function without affecting the hand feeling of the user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is to prior art's current situation, provides a big door lock structure of power of opening the door.

The utility model aims to solve the second technical problem to provide a door lock structure that power of opening the door is greater than the power of closing the door to prior art's current situation.

The utility model aims to solve the third technical problem is to prior art's current situation, provides a domestic appliance who uses above-mentioned door lock structure.

The utility model provides a technical scheme that above-mentioned first technical problem adopted is a lock structure for domestic appliance, include

A first side wall of the shell is provided with a lock hole penetrating the wall thickness;

the ejector rod is arranged on one side of the first side wall of the shell and can move towards the direction close to the lock hole or away from the lock hole, the ejector rod extends along the moving direction of the ejector rod, the first end of the ejector rod can penetrate through the lock hole so that the part of the ejector rod is positioned in the shell, a lock notch is formed in the position, close to the first end, of the ejector rod, the end part of the first end, located beside the lock notch, of the ejector rod is of a columnar structure, the moving direction of the ejector rod is defined as the first direction, and the moving direction of the ejector rod towards the direction away from the lock hole is defined as the forward direction of the first direction;

the lock catch is rotatably arranged in the shell around an axis extending along the second direction, the lock catch is sequentially divided into a first part and a second part along the forward direction of the third direction, the first direction, the second direction and the third direction are mutually perpendicular in pairs, the first part is close to the lock hole, a locking groove with a C-shaped opening is formed in the first part, and the lock catch can rotate to a locking state that the locking groove limits the columnar structure of the ejector rod in the locking state and locks the ejector rod and an unlocking state that the opening of the locking groove faces the lock hole to allow the columnar structure of the ejector rod to be separated from the locking groove;

it is characterized by also comprising

The locating element can be movably arranged in the shell, the locating element is always abutted to the lock catch to limit the rotation of the lock catch, and the direction of the force exerted on the lock catch by the locating element is opposite to the rotation direction of the lock catch in at least a local process of the lock catch rotating from a locking state to an unlocking state.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the force which is applied to the positioning piece and needs to be overcome when the lock catch rotates from the unlocking state to the locking state is smaller than the force which needs to be overcome when the lock catch rotates reversely.

The setting element can have multiple structural style, simple structure ground, be equipped with the mounting bracket in the casing, the setting element is the torsional spring, including the unsettled winding unit who sets up and extend the first torque arm and the second torque arm that form respectively from this winding unit's both ends, the winding unit is located and deviates from one side of the locking groove opening direction of hasp, the end of first torque arm is connected with the middle part at the edge of the second part of hasp, the end of second torque arm is installed on the mounting bracket, and the end of second torque arm is located the forward side that extends along the third direction of hasp, the hasp can rotate to the intermediate state that its rotation center, the end of first torque arm and the end of second torque arm are in same straight line in the third direction, the hasp reaches the locking state after the intermediate state is crossed to the unlocking state.

In order to enable the force which needs to be overcome by the lock catch to be larger when the door is opened, when the lock catch is in a locking state, an included angle between a connecting line between the tail end of the first torsion arm and the center of the winding unit and a connecting line between the tail end of the second torsion arm and the center of the winding unit is b, and when the lock catch rotates towards a middle state from the locking state, an included angle between a connecting line between the tail end of the first torsion arm and the center of the winding unit and an included angle between the tail end of the second torsion arm and the center of the winding unit are c, b > c. The size of the torsion spring force depends on the included angle between the first torsion arm and the second torsion arm of the torsion spring, the smaller the included angle is, the larger the torsion spring force is, and the larger the force required to be overcome by the lock catch is.

In order to ensure that the force which needs to be overcome by the lock catch is smaller when the door is closed, when the lock catch is in an unlocking state, an included angle between a connecting line between the tail end of the first torsion arm and the center of the winding unit and a connecting line between the tail end of the second torsion arm and the center of the winding unit is a, and a > b. Therefore, the door closing force is greater than the door opening force, and the use hand feeling is good.

The columnar structure who prevents the ejector pin is not spacing in locking groove, but the hasp is in the state of upset forward, leads to the columnar structure follow-up unable inserting locking groove of ejector pin, the edge that is close to the lockhole of locking groove of hasp is the first inclined plane of the forward slope towards the third direction along the forward of first direction, the mounting bracket can remove in the third direction for the casing, just the mounting bracket remains the trend to the reverse movement of third direction all the time under the effect of first elastic component. After the columnar structure of ejector pin contacted first inclined plane like this, because the ejector pin is to the reverse motion of first direction, can promote hasp, torsional spring, the whole forward movement to the third direction of mounting bracket, first elastic component is compressed, treat that the columnar structure of ejector pin removes to locking in the groove after, the ejector pin disappears to the extrusion force of hasp, mounting bracket, the hasp is whole under the effect of first elastic component to the reverse movement of third direction, the columnar structure of ejector pin is spacing in the locking groove of hasp, the hasp is colluded to the ejector pin promptly.

In order to further improve the door opening force, the first elastic piece is a spring, and the center line of the spring is staggered with the rotation center of the lock catch in the third direction. Because the end of the second torque arm of the torsion spring is arranged on the mounting frame, the first elastic piece applies force on the mounting frame, so that the torsion spring generates certain torque, and the door opening force is increased.

In order to enable the columnar structure of the ejector rod to easily push the lock catch to rotate, a sliding plate extending along the second direction is arranged in the shell, the sliding plate can be arranged in a locking groove of the lock catch in a penetrating mode and can abut against the columnar structure of the ejector rod, the sliding plate can move in the third direction relative to the shell, and the sliding plate always keeps the trend of forward movement in the third direction under the action of the second elastic piece. The columnar structure of ejector pin promotes the slide like this, and the slide promotes the hasp upset again, and the size of the fore shaft of otherwise ejector pin needs to be done great, just can make the columnar structure of ejector pin contact the edge of locking groove, and the ejector pin probably is difficult for promoting the hasp and rotates.

Under the state that the door body is opened, because the ejector rod is separated from the shell, hot steam easily enters the shell from the lock hole of the shell, the part in the shell is corroded, and the sliding plate is convexly provided with a convex part which can be embedded in the lock hole on the shell. When the door body is opened, the sliding plate can move forward in the first direction under the action of the first elastic piece until the convex part is embedded in the lock hole, so that steam is prevented from entering the shell; when the door needs to be closed, the ejector rod pushes the convex part first to enable the sliding plate to move in the reverse direction of the first direction, and then the sliding plate pushes the edge of the locking groove of the lock catch to turn over.

In order to improve the use safety of the door lock, a micro switch and a trigger part are arranged in the shell, a first contact is arranged on the micro switch, the trigger part comprises a reed and a second contact, one end of the reed is fixedly arranged relative to the shell, the second contact is arranged on the reed close to the free end of the reed, and the second contact always keeps the trend of being far away from or abutting against the first contact under the action of the reed; when the lock catch is in a locking state, the first contact is separated from or contacted with the second contact;

the shell is also movably provided with a linkage block connected with the sliding plate, the linkage block moves along the arrangement direction of the first contact and the second contact, and the reed is positioned on the moving path of the linkage block. Through setting up micro-gap switch, make only when the hasp is in the locking state, can start the equipment of using the lock structure, avoided equipment mistake to start and lead to the incident.

In order to enable the linkage block to be linked with the sliding plate, a second inclined surface which inclines in the direction away from the sliding plate along the forward direction of the third direction is arranged on the sliding plate, the first end of the linkage block slides along the second inclined surface, and the linkage block always keeps the trend that the first end of the linkage block is abutted to the second inclined surface under the action of the third elastic piece. Thus, when the sliding plate moves upwards, the linkage block slides along the second inclined surface on the sliding plate, so that the spring leaf is pushed to move, and the first contact and the second contact are contacted or separated.

In order to enable the reed to be positioned on the moving path of the linkage block, a groove is formed in the linkage block, and the free end of the reed extends into the groove.

In order to improve the working reliability of the micro switch, the linkage block and the reed are respectively provided with two, and correspondingly, the second inclined plane on the sliding plate is also provided with two. Therefore, the two micro switches can simultaneously detect the state of the lock catch, and the working reliability is high; and even if one microswitch fails, the other can still function.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: an electrical apparatus of using above-mentioned lock structure, its characterized in that: the box body is internally provided with a chamber with an opening at one side, the door body can be movably arranged at the opening of the box body to open and close the chamber, the ejector rod can be movably arranged on the side wall of the box body along the first direction, and the shell is arranged on the door body.

The household appliance can be a steam box, an oven and the like, in the scheme, the household appliance is a cleaning machine, the top of the box body is open, the first direction is the vertical direction, the second direction is the left-right direction, and the third direction is the front-back direction; or the household appliance is a cleaning machine, the front side of the box body is open, the first direction is the front-back direction, the second direction is the left-right direction, and the third direction is the up-down direction. When a user opens the door, the door body cannot be completely opened easily at a time due to the fact that large force needs to be applied, large-area steam pavement is caused, the door opening process is stable, and safety is good.

Compared with the prior art, the utility model has the advantages that: 1. the utility model discloses a make the hasp rotate to the at least local in-process of unblock state from the locking state, the direction of the direction that the setting element exerted on the hasp is opposite with the rotation direction of hasp, and like this, when opening the door, the power that the hasp needs to overcome is great, and the user is when opening the door, because the power that needs to exert is great, so the door body can not be opened completely easily at once, and the process of opening the door is more stable, and the security is good; the door body is not easy to be opened by mistake because of large door opening force; 2. this application is greater than the power that the hasp need overcome when closing the door through the power that makes the hasp need overcome when opening the door, and the user can be relatively easy closing the door, but needs certain power just can open the door, and the use when opening and closing the door feels good like this.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention (the lock catch is in a locked state);

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

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic view of the door lock structure of FIG. 3;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic structural view of FIG. 5 with the stem and the first housing removed;

FIG. 7 is a schematic view of the structure of FIG. 6 with the second housing removed;

FIG. 8 is a schematic view of a portion of the structure of FIG. 7;

FIG. 9 is a schematic structural view of the latch, torsion spring, and mounting bracket of FIG. 7;

fig. 10 is a cross-sectional view of embodiment 1 of the present invention (the latch is in an unlocked state, and the post rod is located below the housing);

fig. 11 is a cross-sectional view of embodiment 1 of the present invention (the lock catch is in an unlocked state, and the carrier rod abuts against the slide plate);

fig. 12 is a cross-sectional view of embodiment 1 of the present invention (with the latch in an intermediate state);

fig. 13 is a sectional view of embodiment 2 of the present invention;

FIG. 14 is a schematic structural view of the door latch structure of FIG. 13;

FIG. 15 is an exploded view of FIG. 14;

FIG. 16 is a schematic view of the structure of FIG. 15 with the stem and the first housing removed;

FIG. 17 is a schematic view of the structure of FIG. 16 with the second housing removed;

FIG. 18 is a schematic view of the structure of FIG. 17 in another direction;

FIG. 19 is a schematic structural view of the positioning member shown in FIG. 18;

FIG. 20 is a schematic view of the latch of FIG. 18;

FIG. 21 is a schematic structural view of the positioning member and the first linkage member of FIG. 18;

FIG. 22 is a schematic view of the states of the first and second microswitches of FIG. 13;

fig. 23 is a sectional view (the latch is in an unlocked state) of embodiment 2 of the present invention;

FIG. 24 is a schematic view of the states of the first and second microswitches of FIG. 23;

fig. 25 is a cross-sectional view of embodiment 2 of the present invention (the shackle has passed the reversal point but has not reached the locked condition).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 12, the household appliance of the preferred embodiment is a washing machine, especially an embedded washing machine, which can wash vegetables, fruits or tableware, but the household appliance of the present application is not limited to a washing machine, and may also be a steam box, an oven, etc.

As shown in fig. 1 to 3, the household appliance includes a box body 1, a door 2 and a door lock structure a, wherein a chamber 11 with an open front is provided inside the box body 1, the door 2 is movably disposed at the open of the box body 1, for example, one end of the door 2 is rotatably connected to the top of the box body 1, and the other end is detachably connected to the box body 1 through the door lock structure a, so that the door 2 can open and close the chamber; or the door body 2 can be arranged at the opening of the box body 1 in a drawing way.

As shown in fig. 1 to 5, the door lock structure a includes a housing 3, a plunger 4, a latch 5, a positioning element, a sliding plate 7, a micro switch 81, a trigger 82, an installation rack 9, and the like, the housing 3 is disposed on the door body 2, the housing 3 is formed by a first housing 301 and a second housing 302 in a matching manner, a lock hole 31 penetrating through a wall thickness is formed in a side wall of the second housing 302, and the side wall provided with the lock hole 31 is defined as a first side wall 30 of the housing 3.

The push rod 4 is arranged on the side wall of the box body 1 in a manner of being capable of moving back and forth under the action of a driving mechanism (such as a motor), namely, the push rod 4 is arranged on the rear side of the shell 3 in a manner of being capable of moving back and forth, the push rod 4 can move forward and can penetrate through the lock hole 31 and be partially positioned in the shell 3, a lock notch 41 is formed in the position, adjacent to the first end, of the push rod 4, and the end portion, located at the side of the lock notch 41, of the first end of the push rod 4 is of a columnar structure 42, namely, the end portion, located in front of the lock notch 41, of the push rod 4 is of a columnar structure 42.

The latch 5 is sequentially divided into a first portion 5a and a second portion 5b from top to bottom, in this embodiment, the first portion of the latch 5 is an upper portion of the latch 5, the upper portion of the latch 5 has a locking groove 51 with a C-shaped opening, the latch 5 is disposed in the housing 3 and located in front of the locking hole 31, the latch 5 can rotate around an axis of the pin 50 extending in the left-right direction, the latch 5 can rotate to a locking state (shown in fig. 3) in which the locking groove 51 limits the columnar structure 42 of the top rod 4 to lock the top rod 4, and an unlocking state (shown in fig. 10 or 11) in which the opening of the locking groove 51 faces backward to allow the columnar structure 42 of the top rod 4 to be disengaged from the locking groove 51.

The locating piece can be arranged in the shell 3 in a vertically moving mode, the locating piece is always abutted to the lock catch 5 to limit the rotation of the lock catch 5, the locating piece rotates to the unlocking state from the locking state of the lock catch 5 in at least a local process, the direction of the force exerted on the lock catch 5 by the locating piece is opposite to the rotation direction of the lock catch 5, and therefore when the door body 2 is opened, the door opening force is large.

In this application, the force that the locating piece that 5 hasp from the state of unblock rotated to the locked state need to overcome exerted it is less than the power that 5 hasp reverse rotation need overcome, in other words, when 5 hasp from the state of unblock rotated to the locked state, 5 hasp need overcome the locating piece and exert the force that is F1 on, when 5 hasp from the state of unblock rotated to the unlocked state, 5 hasp need overcome the locating piece and exert the force that is F2 on, F1< F2. The power of opening the door of this application is greater than the power of closing the door promptly, and the user can be relatively easy to close the door, but needs certain power just can open the door, and the use when opening and close the door feels good like this.

In this embodiment, the mounting bracket 9 is disposed in the housing 3, the positioning element is a torsion spring 6, the torsion spring 6 includes a winding unit 61 that is disposed in a suspended manner, and a first torsion arm 62 and a second torsion arm 63 that are respectively formed by extending from two ends of the winding unit 61, the winding unit 61 is located on one side away from an opening direction of the locking groove 51 of the latch 5, a terminal of the first torsion arm 62 is connected with a middle portion of a lower edge of the latch 5, a terminal of the second torsion arm 63 is mounted on the mounting bracket 9 and located on a lower side of the latch 5, the latch 5 can rotate to a rotation center (an axis of the pin 50), the terminal of the first torsion arm 62 and a terminal of the second torsion arm 63 are in an intermediate state (as shown in fig. 12) of the same straight line in an up-down direction, the latch 5 reaches the locked state after crossing the intermediate state from the unlocked state, and similarly, the latch 5 can reach the unlocked state after crossing the intermediate state from the locked state.

When the lock catch 5 is in the locking state, an angle between a connecting line between the end of the first torsion arm 62 and the center of the winding unit 61 and a connecting line between the end of the second torsion arm 63 and the center of the winding unit 61 is b (as shown in fig. 3), and when the lock catch 5 rotates from the locking state to the intermediate state, an angle between a connecting line between the end of the first torsion arm 62 and the center of the winding unit 61 and a connecting line between the end of the second torsion arm 63 and the center of the winding unit 61 is c (not shown), and b > c. When the lock catch 5 is in the unlocked state, the angle between the line between the end of the first torsion arm 62 and the center of the winding unit 61 and the line between the end of the second torsion arm 63 and the center of the winding unit 61 is a (as shown in fig. 10 or 11), a > b.

The force of the torsion spring 6 depends on the included angle between the connecting line between the end of the first torsion arm 62 and the center of the winding unit 61 and the connecting line between the end of the second torsion arm 63 and the center of the winding unit 61, and the smaller the included angle, the larger the force of the torsion spring 6, the larger the force that the latch 5 needs to overcome. Therefore, when the door is closed, the force required to be overcome by the lock catch 5 is smaller, the door closing force is greater than the door opening force, and the use hand feeling is good.

As shown in fig. 6 to 8, the housing 3 is provided with a sliding plate 7 extending in the left-right direction, the sliding plate 7 can be inserted into the locking groove 51 of the lock catch 5 and can abut against the columnar structure 42 of the post rod 4, the sliding plate 7 can move back and forth relative to the housing 3, and the sliding plate 7 always tends to move back under the action of the second elastic member 71. The slide plate 7 is provided with a guide block 75, the housing 3 is provided with a guide groove 30 extending in the front-rear direction, and the guide block 75 can slide along the guide groove 30.

Thus, the column structure 42 of the push rod 4 pushes the sliding plate 7, and the sliding plate 7 pushes the lock catch 5 to turn over, otherwise the size of the locking notch 41 of the push rod 4 needs to be larger, so that the column structure 42 of the push rod 4 can contact the front edge of the locking groove 51, otherwise the push rod 4 may not easily push the lock catch 5 to rotate.

As shown in fig. 10, in the state that the door body 2 is opened, because the plunger 4 is separated from the casing 3, so that the hot steam is easy to enter the casing 3 from the lock hole 31 of the casing 3, the components in the casing 3 are rusted, and the slide plate 7 is provided with a convex part 72 which can be embedded in the lock hole 31 on the casing 3. Thus, when the door body 2 is opened, the sliding plate 7 moves backwards under the action of the second elastic piece 71 until the convex part 72 is embedded in the lock hole 31, and steam is prevented from entering the shell 3; when it is necessary to close the door, the push rod 4 pushes the protrusion 72 to move the slider 7 forward, and then the slider 7 pushes the locking groove 51 of the locking buckle 5 to turn the locking buckle 5 over. In order to further ensure the sealing property of the projection 72 against the lock hole 31, a packing 720 is fitted over the projection 72, and the packing 720 is pressed between the inner wall of the housing 3 and the slide plate 7 in a state where the projection 72 is fitted in the lock hole 31.

The working process of the door lock structure of the embodiment is as follows:

initial position: as shown in fig. 10, the top bar 4 is located at the rear of the casing 3, the convex part 72 on the sliding plate 7 is embedded in the lock hole 31 of the casing 3, and the door body 2 is in an open state;

the door closing process: the push rod 4 moves forwards until the push sliding plate 7 moves forwards, the sliding plate 7 contacts the front edge of the locking groove 51 of the lock catch 5 (at this time, an included angle between a connecting line between the tail end of the first torsion arm 62 and the center of the winding unit 61 and a connecting line between the tail end of the second torsion arm 63 and the center of the winding unit 61 is a, the push rod 4 continues to move forwards to enable the lock catch 5 to rotate clockwise (in the direction shown in fig. 10), before the lock catch 5 rotates to the middle state, the force of the torsion spring 6 on the lock catch 5 is opposite to the rotating direction of the lock catch 5, after the lock catch 5 passes through the middle state, the force of the torsion spring 6 on the lock catch 5 is the same as the rotating direction of the lock catch 5, namely after the middle state is passed, the force-bearing direction of the torsion spring 6 changes suddenly;

when the lock catch 5 rotates to the locking state, at this time, the sliding plate 7 moves to the front limit position, the columnar structure 42 of the ejector rod 4 is constrained in the locking groove 51 of the lock catch 5, and the notch of the locking groove 51 faces upward and can also face upward and slightly forward, at this time, an included angle between a connecting line between the tail end of the first torsion arm 62 and the center of the winding unit 61 and a connecting line between the tail end of the second torsion arm 63 and the center of the winding unit 61 is b (as shown in fig. 3), a > b, namely the stress of the torsion spring 6 after being turned to the middle state is greater than the stress of the torsion spring 6 before passing through the middle state;

after the columnar structure 42 of the top rod 4 is restrained in the locking groove 51 of the lock catch 5, the top rod 4 moves backwards, and then the door body 2 can be closed.

The door opening process: the push rod 4 moves backward and drives the lock catch 5 to rotate counterclockwise (in the direction shown in fig. 3), when the lock catch 5 is located between the locking state and the intermediate state, the torsion spring 6 is compressed, the force of the torsion spring 6 on the lock catch 5 is opposite to the rotation direction of the lock catch 5 (i.e. the direction of the force exerted on the lock catch 5 by the positioning element is opposite to the rotation direction of the lock catch 5 in the local process of the lock catch 5 rotating from the locking state to the unlocking state), the included angle between the connecting line between the tail end of the first torsion arm 62 and the center of the winding unit 61 and the connecting line between the tail end of the second torsion arm 63 and the center of the winding unit 61 is c (not shown in the figure), and b > c, i.e. the force of the torsion spring 6 is increased first. After the latch 5 goes beyond the intermediate state, the force of the torsion spring 6 on the latch 5 is the same as the rotation direction of the latch 5, and as the latch 5 rotates, the included angle between the connecting line between the end of the first torsion arm 62 and the center of the winding unit 61 and the connecting line between the end of the second torsion arm 63 and the center of the winding unit 61 becomes larger gradually, and the force applied to the torsion spring 6 is reduced gradually.

When the locker 5 is rotated counterclockwise until the notch of the locking groove 51 faces rearward, as shown in fig. 11, the knock rod 4 can be disengaged from the locking groove 51, the knock rod 4 continues to move downward to disengage from the door body 2, and then the door body 2 can be opened forward.

Because a > b > c, the door-closing force is smaller than the unlocking force of the door-opening force, the design gives customers better experience, the door-closing force (locking force) is small, the door-opening force (unlocking force) is large, and the cleaning machine is safer and more reasonable in use safety.

As shown in fig. 6 to 8, a micro switch 81 and a trigger 82 are provided in the housing 3, the micro switch 81 is provided with a first contact 811, the trigger 82 includes a spring plate 821 and a second contact 822, one end of the spring plate 821 is fixedly mounted in the housing 3 through a mounting plate 823, the second contact 822 is provided at a position on the spring plate 821 adjacent to the free end thereof, and the second contact 822 always tends to be away from the first contact 811 by the spring plate 821.

The housing 3 is further movably provided with a linkage block 83 connected with the sliding device, the linkage block 83 moves along the arrangement direction of the first contact 811 and the second contact 822, the linkage block 83 is provided with a groove 831, and the free end of the reed 821 extends into the groove 831, so that the reed 821 is positioned on the moving path of the linkage block 83, and the first contact 811 contacts with the second contact 822 when the latch 5 is in the locked state.

In this embodiment, the sliding plate 7 is provided with a second inclined surface 74 inclined from top to bottom in a direction away from the sliding plate 7, the first end of the linkage block 83 slides along the second inclined surface 74, and the linkage block 83 always keeps the first end thereof in a tendency of abutting against the second inclined surface 74 under the action of the third elastic member 832. Thus, when the sliding plate 7 moves upward, the linkage block 83 slides along the second inclined surface 74 of the sliding plate 7, thereby pushing the spring 821 to move, so that the first contact 811 contacts with the second contact 822. In this embodiment, the third elastic member 832 is a spring, one end of which abuts against the linkage block 83 and the other end of which abuts against the side wall of the housing 3.

Of course, the spring 821 of the second contact 822 may be always kept against the first contact 811, and the first contact 811 may be separated from the second contact 822 when the lock 5 is locked.

This embodiment makes only when hasp 5 is in the lock-out state, can start the equipment of using the lock structure through setting up micro-gap switch 81, has avoided equipment mistake to start and has leaded to the incident. However, in order to improve the operational reliability of the microswitch 81, two microswitches 81, two interlocking blocks 83 and two spring pieces 821 are provided, and correspondingly, two second inclined surfaces 74 are provided on the slide plate 7. Therefore, the two micro switches 81 can detect the state of the lock catch 5 at the same time, and the working reliability is high; and even if one of the micro switches 81 fails, the other one can be operated.

The cleaning machine of this embodiment is further provided with a signal receiver, and the signal receiver is in signal connection with the microswitch 81. When the door body 2 is locked (namely the lock catch 5 is in a locked state), the micro switch 81 is triggered, the signal receiver sends out a working signal when receiving an on signal of the micro switch 81, a cleaning program of the cleaning machine is allowed to be started, when the door body 2 is unlocked (namely the lock catch 5 is in an unlocked state), the micro switch 81 is not triggered, the signal receiver sends out a power-off signal when receiving an off signal of the micro switch 81, and the cleaning program of the cleaning machine is not allowed to be started.

In order to prevent the columnar structure 42 of the top rod 4 from not being limited in the locking groove 51, but the lock catch 5 is in a forward-turned state, so that the columnar structure 42 of the top rod 4 cannot be inserted into the locking groove 51 subsequently, the edge of the locking groove 51 of the lock catch 5, which is close to the locking hole 31, is a first inclined surface 52 which is inclined downwards from front to back, the mounting frame 9 can move up and down relative to the housing 3, and the mounting frame 9 always keeps a tendency of moving upwards under the action of the first elastic piece 91. In this embodiment, the first elastic member 91 is a spring, one end of which abuts against the lower sidewall of the mounting frame 9, and the other end of which abuts against the sidewall of the housing 3.

After the columnar structure 42 of ejector pin 4 contacts first inclined plane 52 like this, because ejector pin 4 forward motion, can promote hasp 5, torsion spring 6, the whole downstream of mounting bracket 9, first elastic component 91 is compressed, treat that the columnar structure 42 of ejector pin 4 removes back in locking groove 51, the downward extrusion force of ejector pin 4 to hasp 5 disappears, mounting bracket 9, hasp 5 is whole to move up under the effect of first elastic component 91, the columnar structure 42 of ejector pin 4 is spacing in the locking groove 51 of hasp 5, namely, hasp 5 is caught to ejector pin 4, the course of closing the door unanimous of course and the above-mentioned of working after that.

In addition, the center line of the first elastic member 91 is offset in the front-rear direction from the rotation center of the lock catch 5. Because the end of the second torsion arm 63 of the torsion spring 6 is mounted on the mounting bracket 9, the first elastic member 91 exerts a force on the mounting bracket 9, which causes the torsion spring 6 to generate a certain torque, increasing the door opening force.

Example 2

Embodiment 2 differs from embodiment 1 in the specific structure of the door lock structure.

As shown in fig. 13 to 25, the door lock structure a includes a housing 3, a plunger 4, a latch 5, a positioning member 6, a first micro switch 71a, a first trigger 72a, a second micro switch 81a, a second trigger 82a, and the like, the housing 3 is disposed on the door body 2, the housing 3 is formed by a first housing 301 and a second housing 302 in a matching manner, a lock hole 31 having a through wall thickness is formed in a side wall of the second housing 302, and the side wall having the lock hole 31 is defined as a first side wall 30 of the housing 3.

The top rod 4 is arranged on the side wall of the box body 1 in a way of moving back and forth under the action of a driving mechanism (such as a motor), namely, the top rod 4 is arranged on the rear side of the shell 3 in a way of moving back and forth, the top rod 4 moves forward and can penetrate through the lock hole 31 and be partially positioned in the shell 3, a lock notch 41 is formed in the position, adjacent to the first end, of the top rod 4, the end part of the first end, positioned beside the lock notch 41, of the top rod 4 is of a columnar structure 42, namely, the end part, positioned in front of the lock notch 41, of the top rod 4 is of the columnar structure 42.

The latch 5 is sequentially divided into a first portion 5a and a second portion 5b from top to bottom, in this embodiment, the first portion of the latch 5 is an upper portion of the latch 5, the upper portion of the latch 5 has a locking groove 51 with a C-shaped opening, the latch 5 is disposed in the housing 3 and located in front of the locking hole 31, the latch 5 can rotate around an axis of the pin 50 extending in the left-right direction, the latch 5 can rotate to a locking state (as shown in fig. 13) in which the locking groove 51 limits the columnar structure 42 of the top rod 4 to lock the top rod 4, and an unlocking state (as shown in fig. 23) in which the opening of the locking groove 51 faces backward to allow the columnar structure 42 of the top rod 4 to be disengaged from the locking groove 51.

The positioning element 6 is disposed in the housing 3 to move up and down, and the positioning element 6 always tends to move up under the action of the fourth elastic element 60, so that the upper portion of the positioning element 6 can always abut against the lock catch 5 to limit the rotation of the lock catch 5. In this embodiment, the fourth elastic element 60 is a spring, one end of which abuts against the lower portion of the positioning element 6, and the other end of which abuts against the side wall of the positioning element 6.

The upper portion of the positioning member 6 includes a planar portion 61a and a first inclined portion 62a, the planar portion 61a extends in the front-rear direction, the first inclined portion 62a inclines from top to bottom, the outer peripheral profile of the rear portion of the lock catch 5 includes a first arc-shaped surface 52a, a connecting surface 53a and a second arc-shaped surface 54a, which are sequentially arranged and connected, and the rotation center (the axis of the pin shaft 50) of the lock catch 5 is arranged adjacent to the inner edge of the middle portion of the locking groove 51. When the lock catch 5 is in the locked state, the second arc-shaped surface 54a of the lock catch 5 abuts against the first inclined surface portion 62a of the positioning member 6 (as shown in fig. 13); when the lock catch 5 is in the unlocked state, the first arc-shaped surface 52a of the lock catch 5 abuts against the flat surface 61a of the positioning member 6 (as shown in fig. 23).

When the lock catch 5 is locked, the push rod 4 pushes the lock catch 5 to rotate counterclockwise, the first arc-shaped surface 52a of the lock catch 5 abuts against the plane part 61a on the positioning part 6 in the initial state, and along with the rotation of the lock catch 5, the positioning part 6 moves downwards and the fourth elastic part 60 is compressed; when the lock catch 5 rotates to the joint between the connecting surface 53a and the first inclined surface portion 62a and the plane portion 61a, and at this time, at the turning point of the lock catch 5, after the turning point is passed (as shown in fig. 25), as the push rod 4 continues to move forward, because the radius of the second arc-shaped surface 54a gradually decreases, the positioning element 6 moves upward under the action of the fourth elastic element 60, the friction between the first inclined surface portion 62a and the second arc-shaped surface 54a becomes smaller, and the lock catch 5 rapidly turns to the locking state (as shown in fig. 13).

In a state where the second arc-shaped surface 54a abuts against the first inclined surface portion 62a, the force F1 applied by the positioning member 6 to the lock catch 5 can be decomposed into a backward force and an upward force (the decomposition of the force is shown in fig. 13), and the lock catch 5 needs to be turned forward (clockwise) when unlocking, so that the backward force applied by the positioning member 6 to the lock catch 5 is opposite to the rotation direction of the lock catch 5, so that the force to be overcome when unlocking is performed is large, and a torque F1L 1 is generated between the force F1 of the positioning member 6 to the lock catch 5 and a distance L1 (not shown in the figure) of the rotation center of the lock catch 5, which results in that the unlocking force becomes large.

As shown in fig. 16 to 18, 21 and 24, a first microswitch 71a and a first trigger 72a are provided in the housing 3, the first microswitch 71a has a first contact 711, the first trigger 72a includes a first spring 721 and a second contact 722, one end of the first spring 721 is fixedly mounted in the housing 3 through a mounting plate 723, the second contact 722 is provided on the first spring 721 near the free end thereof, and the second contact 722 always keeps a tendency of separating from the first contact 711 under the action of the first spring 721.

The housing 3 further has a first linkage member 73 movably connected to the positioning member 6, and a first spring 721 is located on a moving path of the first linkage member 73, so that the first contact 711 contacts with the second contact 722 when the latch 5 is in the locked state.

The side wall of the positioning member 6 is provided with a receiving groove 601, a partial wall surface of the receiving groove 601 extends up and down and inclines forward or backward to form a third inclined surface 63a, the first linkage member 73 is rod-shaped, the first linkage member 73 comprises a first extension arm 731 and a second extension arm 732 which are integrally connected, the connection part of the first extension arm 731 and the second extension arm 732 is rotatably arranged in the housing 3 through a mounting shaft, the end of the first extension arm 731 is provided with a sliding block 7311 which can slide along the third inclined surface 63a, and the first reed 721 is located on the moving path of the second extension arm 732. When the positioning element 6 moves up and down, the third inclined surface 63a drives the first linkage 73 to rotate, so that the second extension arm 732 pushes the first spring 721, and the first contact 711 and the second contact 722 abut against each other. 73

The cleaning machine of the embodiment is further provided with a signal receiver, and the signal receiver is in signal connection with the first microswitch 71 a. When the door body 2 is locked (namely the lock catch 5 is in a locked state), the first micro switch 71a is triggered, the signal receiver sends out a working signal when receiving an on signal of the first micro switch 71a, a cleaning program of the cleaning machine is allowed to be started, when the door body 2 is unlocked (namely the lock catch 5 is in an unlocked state), the first micro switch 71a cancels the trigger, the signal receiver sends out a power-off signal when receiving an off signal of the first micro switch 71a, and the cleaning program of the cleaning machine is not allowed to be started. In other words, by arranging the first microswitch 71a, the equipment applying the door lock structure can be started only when the lock catch 5 is in the locking state, and the safety accident caused by the false starting of the equipment is avoided.

Of course, the second contact 722 may always be kept against the first contact 711 by the first spring 721, and the first contact 711 and the second contact 722 may be separated when the latch 5 is in the locked state.

If a chopstick or a spoon or the like is inserted into the lock hole 31 of the housing 3 to push the lock catch 5 to turn over, the first microswitch 71a may be triggered by mistake and send a signal to the controller, so that the second microswitch 81a and the second trigger 82a are arranged in the housing 3, and the second microswitch 81a has a third contact 811a; the second trigger 82a includes a second spring 821a and a fourth contact 822a, one end of the second spring 821a is fixedly disposed relative to the housing 3, the fourth contact 822a is disposed on the second spring 821a near the free end thereof, and the fourth contact 822a always keeps a tendency of being against the third contact 811a under the action of the second spring 821 a.

The housing 3 further has a second linkage 83a movably connected to the plunger 4, and the second reed 821a is located on a moving path of the second linkage 83a, so that the third contact 811a is separated from the fourth contact 822a when the latch 5 is in the locked state. Thus, only when the columnar structure 42 of the jack 4 is locked in the locking groove 51, the third contact 811a and the fourth contact 822a are disengaged or contacted, and the second microswitch 81a is triggered.

In this embodiment, the second linkage 83a includes a first moving block 831a, a second elastic member 832a, a connecting rod 833a, and a second moving block 834a.

The first moving block 831a is disposed in the housing 3 in a manner of moving back and forth, the first moving block 831a is at least partially located in front of the top rod 4, a fourth inclined surface 8311a inclined from front to back in a direction away from the first moving block 831a is disposed on the first moving block 831a, and the second elastic member 832a acts on the first moving block 831a to enable the first moving block 831a to keep a tendency of moving back all the time.

One end of the connecting rod 833a is located on the fourth inclined surface 8311a and can slide along the fourth inclined surface 8311a, the stopper 8340a on the second moving block 834a is located on the moving path of the other end of the connecting rod 833a, a groove 8341a is formed in the second moving block 834a, and the free end of the second reed 821a extends into the groove 8341a, so that the second reed 821a is located on the moving path of the second moving block 834a.

When the top rod 4 moves forward, the first moving block 831a moves forward along with the first moving block 831a, because the fourth inclined surface 8311a forces the connecting rod 833a to move in a direction away from the first moving block 831a, the connecting rod 833a pushes the second moving block 834a to move during moving, so as to drive the free end of the second reed 821a to move, and the third contact 811a contacts with the fourth contact 822 a. Of course, the fourth contact 822a may be kept in contact with the third contact 811a by the second spring pieces 821a, and the third contact 811a may be separated from the fourth contact 822a when the latch 5 is in the locked state.

Therefore, only when the first microswitch 81 and the second microswitch 81 are triggered and send signals to the controller, the cleaning program of the cleaning machine is allowed to be started, and the reliability is high.

In the two embodiments, the moving direction of the push rod 4 is defined as a first direction, the direction in which the push rod 4 moves away from the lock hole 31 is defined as a forward direction of the first direction, the direction of the axis of the rotating shaft of the lock catch 5 is defined as a second direction, and the moving direction of the positioning element 6 is defined as a third direction, and in this embodiment, the cleaning machine with an open front is taken as an example, so the first direction is a front-back direction, the second direction is a left-right direction, and the third direction is an up-down direction; of course, the door lock structure of the present embodiment is also applicable to a washing machine with an open top, in which case the first direction is an up-down direction, the second direction is a left-right direction, and the third direction is a front-back direction.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to 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 invention may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered limiting, as "upper", "lower", and the like are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (15)

1. A door lock structure for a home appliance includes

A housing (3) having a first side wall (30) formed with a lock hole (31) penetrating the wall thickness;

the push rod (4) is arranged on one side of a first side wall (30) of the shell (3), the push rod (4) can move towards a direction close to the lock hole (31) or far away from the lock hole (31), the push rod (4) extends along the moving direction of the push rod, the first end of the push rod (4) can penetrate through the lock hole (31) so that the push rod (4) is partially located in the shell (3), a lock opening (41) is formed in the position, close to the first end, of the push rod (4), the end portion, located on the side of the lock opening (41), of the push rod (4) is of a columnar structure (42), the moving direction of the push rod (4) is defined as a first direction, and the direction, far away from the lock hole (31), of the push rod (4) is defined as the positive direction of the first direction;

the lock catch (5) is arranged in the shell in a rotating mode around an axis extending along the second direction, the lock catch (5) is sequentially divided into a first part (5 a) and a second part (5 b) along the forward direction of the third direction, the first direction, the second direction and the third direction are perpendicular to each other in pairs, the first part (5 a) is close to the lock hole (31), a locking groove (51) with a C-shaped opening is formed in the first part (5 a), and the lock catch (5) can rotate to a locking state that the locking groove (51) limits the columnar structure (42) of the ejector rod (4) in the locking state and the opening of the locking groove (51) faces the lock hole (31) to allow the columnar structure (42) of the ejector rod (4) to be separated from the locking groove (51);

it is characterized by also comprising

The setting element can locate casing (3) movably, the setting element is inconsistent with hasp (5) all the time in order to restrict the rotation of hasp (5) from the locking state towards the pivoted at least local in-process of unblock state, the direction of force that the setting element was exerted on hasp (5) is opposite with the direction of rotation of hasp (5).

2. The door lock structure according to claim 1, wherein: the force which is applied to the positioning piece and needs to be overcome when the lock catch (5) rotates from the unlocking state to the locking state is smaller than the force which needs to be overcome when the lock catch (5) rotates reversely.

3. The door lock structure according to claim 1, wherein: be equipped with mounting bracket (9) in casing (3), the setting element is torsional spring (6), including unsettled winding unit (61) that sets up and extend first torque arm (62) and second torque arm (63) that form respectively from the both ends of this winding unit (61), winding unit (61) are located and deviate from one side of locking groove (51) opening direction of hasp (5), the middle part of the end of first torque arm (62) and the edge of second part (5 b) of hasp (5) is connected, the end of second torque arm (63) is installed on mounting bracket (9), and the end of second torque arm (63) is located the forward side that extends along the third direction of hasp (5), hasp (5) can rotate to its center of rotation, the end of first torque arm (62) and the end of second torque arm (63) are in the intermediate state of same straight line in the third direction, hasp (5) reach the locking state after crossing the intermediate state from the unlocking state.

4. The door lock structure according to claim 3, wherein: when the lock catch (5) is in a locking state, an included angle between a connecting line between the tail end of the first torsion arm (62) and the center of the winding unit (61) and a connecting line between the tail end of the second torsion arm (63) and the center of the winding unit (61) is b, and when the lock catch (5) rotates towards a middle state from the locking state, an included angle between a connecting line between the tail end of the first torsion arm (62) and the center of the winding unit (61) and a connecting line between the tail end of the second torsion arm (63) and the center of the winding unit (61) is c, b > c.

5. The door lock structure according to claim 4, wherein: when the lock catch (5) is in an unlocking state, an included angle between a connecting line between the tail end of the first torsion arm (62) and the center of the winding unit (61) and a connecting line between the tail end of the second torsion arm (63) and the center of the winding unit (61) is a, a > b.

6. The door lock structure according to claim 3, wherein: the edge that is close to lockhole (31) of locking groove (51) of hasp (5) is along the forward of first direction towards the first inclined plane (52) of the forward slope of third direction, mounting bracket (9) can move in the third direction for casing (3), just mounting bracket (9) remain the trend of the reverse movement to the third direction all the time under the effect of first elastic component (91).

7. The door lock structure according to claim 6, wherein: the first elastic piece (91) is a spring, and the center line of the spring is staggered with the rotation center of the lock catch (5) in the third direction.

8. The door lock structure according to any one of claims 1 to 7, wherein: be equipped with slide (7) that extend along the second direction in casing (3), slide (7) can wear to establish in the locking groove (51) of hasp (5) and can offset with columnar structure (42) of ejector pin (4), just slide (7) can move in the third direction for casing (3), slide (7) keep the trend to the forward movement of third direction all the time under the effect of second elastic component (71).

9. The door lock structure according to claim 8, wherein: the sliding plate (7) is convexly provided with a convex part (72) which can be embedded in the lock hole (31) on the shell (3).

10. The door lock structure according to claim 8, wherein: a micro switch (81) and a trigger piece (82) are arranged in the shell (3), a first contact (811) is arranged on the micro switch (81), the trigger piece (82) comprises a reed (821) and a second contact (822), one end of the reed (821) is fixedly arranged relative to the shell (3), the second contact (822) is arranged on the reed (821) at a position close to the free end of the reed, and the second contact (822) always keeps a trend of being far away from or offsetting against the first contact (811) under the action of the reed (821); when the lock catch (5) is in a locked state, the first contact (811) is separated from or contacted with the second contact (822);

the shell (3) is also movably provided with a linkage block (83) connected with the sliding plate (7), the linkage block (83) moves along the arrangement direction of the first contact (811) and the second contact (822), and the reed (821) is positioned on the moving path of the linkage block (83).

11. The door lock structure according to claim 10, wherein: the sliding plate (7) is provided with a second inclined surface (74) which inclines in the direction far away from the sliding plate (7) along the forward direction of the third direction, the first end of the linkage block (83) slides along the second inclined surface (74), and the linkage block (83) always keeps the trend that the first end of the linkage block is abutted against the second inclined surface (74) under the action of the third elastic piece (832).

12. The door lock structure according to claim 11, wherein: a groove (831) is formed in the linkage block (83), and the free end of the reed (821) extends into the groove (831).

13. The door lock structure according to claim 11, wherein: the number of the micro switches (81), the number of the linkage blocks (83) and the number of the reed plates (821) are two, and correspondingly, the number of the second inclined surfaces (74) on the sliding plate (7) is also two.

14. A home appliance to which the door lock structure of any one of claims 1 to 13 is applied, wherein: still include box (1) and the door body (2), box (1) inside has one side open-ended cavity (11), thereby the door body (2) can locate the uncovered department of box (1) with moving and open and close above-mentioned cavity (11), ejector pin (4) can be located on the lateral wall of box (1) along first direction movingly, casing (3) are located on the door body (2).

15. The household appliance according to claim 14, wherein: the household appliance is a cleaning machine, the top of the box body (1) is open, the first direction is the up-down direction, the second direction is the left-right direction, and the third direction is the front-back direction; or the household appliance is a cleaning machine, the front side of the box body (1) is open, the first direction is the front-back direction, the second direction is the left-right direction, and the third direction is the up-down direction.

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