Electrically opening and closing a door of a washing machine

Abstract

The utility model provides a kind of washing machine electric opening door lock.The washing machine electric opening door lock of the utility model includes shell, contact piece, electric opening module, locking module, slider one and cam, the locking module includes locking coil actuator and transmission mechanism one, the electric opening module includes electric opening coil actuator and transmission mechanism two, the shell has three cavities with internal cavity, respectively cavity one, cavity two and cavity three:the electric opening coil actuator, locking coil actuator and contact piece are connected at cavity one, transmission mechanism one is located at cavity one and transmission mechanism one is connected with locking coil actuator and slider one, transmission mechanism two is connected at cavity two and transmission mechanism two is connected with electric opening coil actuator and slider one;The slider one is located at cavity three, and spring one is provided between the inner end of slider one and cavity three.The washing machine electric opening door lock of the utility model is high in stability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to an electric door lock for a washing machine. Background Technology

[0002] In the field of modern fully automatic washing machines (especially drum washing machines), the washing machine door lock, as a key safety and control component, is usually operated by two core electrical components working together: the electric opening coil actuator module and the locking electrical box module (also known as the door lock control module or the latch detection switch assembly). Together, they achieve a complete logical process of "self-locking when the door is closed → preventing opening during washing → automatically unlocking after washing".

[0003] The existing electric door locks for washing machines use a left-right arrangement between the lock cylinder and the electrical box, resulting in a relatively large overall width, reaching up to 79mm. Therefore, the washing machine requires a correspondingly large installation space, leading to the door lock occupying excessive space on the machine.

[0004] Meanwhile, the locking electrical box module and the electric opening coil actuator module of existing washing machine door locks are separate, and the pin interfaces of the two modules are also independently set, making the manufacturing and assembly process of washing machine door locks more cumbersome. Specifically, the customer's entire machine needs to be equipped with two connectors corresponding to the two pin interfaces mentioned above. This not only increases the cost of wiring harnesses, but also requires two separate plugging operations between the two terminals and the corresponding connectors during installation, resulting in a long installation time.

[0005] "Forced door opening" (also known as emergency door opening) refers to the manual opening of the washing machine door through purely mechanical means in abnormal situations such as the washing machine not completing its program, power failure, malfunction, or door lock failure, bypassing the electronic control system. This is an essential safety design for front-loading washing machines (especially front-opening models) to prevent users from being "trapped" or unable to remove clothes. Existing forced door opening structures use multiple springs in conjunction with levers and lever shafts. During assembly, it is necessary to prevent the springs from popping out, making the assembly operation difficult and physically demanding. Utility Model Content

[0006] The first objective of this invention is to address the aforementioned problems in the existing technology by providing a compact and highly stable electric door lock for washing machines.

[0007] The second objective of this invention is to provide a forced-opening structure for a washing machine door lock used in the aforementioned electric door lock.

[0008] To achieve the first objective mentioned above, this utility model can be implemented through the following technical solutions:

[0009] A washing machine electric door lock includes a housing, a contact plate, an electric opening module, a locking module, a slider, and a cam. The locking module comprises a locking coil actuator and a transmission mechanism, the electric opening module comprises an electric opening coil actuator and a transmission mechanism, and the housing has three internally hollow cavities: cavity one, cavity two, and cavity three.

[0010] The electric opening coil actuator, the locking coil actuator, and the contact piece are all connected to one cavity. The first transmission mechanism is located in one cavity and connects the locking coil actuator to the first slider. The second transmission mechanism is connected to the second cavity and connects the electric opening coil actuator to the first slider.

[0011] The slider is located at the cavity three. A spring is provided between the inner end of the slider and the cavity three. The cam is hinged to the housing and a torsion spring is provided between the two. Under the elastic force of the torsion spring, the cam tends to swing down to the point where the door hook is inserted. Under the elastic force of the spring, the slider tends to abut against the cam. At this time, the slider pushes the contact piece and puts it in the open state.

[0012] When the door is closed, the door hook can swing the cam at a set angle after it is engaged. After the cam swings, the slider moves with the swinging cam under the elastic force of the spring. After the slider moves, the contact piece is in the conductive state.

[0013] When the door is closed, the locking coil actuator, when energized, can lock the slider 1 through transmission mechanism 1; when the opening coil actuator, when energized, can unlock the slider 1 through transmission mechanism 2.

[0014] In the aforementioned electric door lock of the washing machine, cavity one and cavity two are adjacent to each other on the left and right, and both are located on the upper part of the shell; cavity three is located on the lower part of the shell, and along the projection direction perpendicular to the shell, cavity one and cavity two are located at opposite ends of cavity three.

[0015] In the aforementioned electric door lock for a washing machine, the locking coil actuator and the transmission mechanism are arranged one in front of the other on one side of the cavity along its length, while the contact piece and the electric opening coil actuator are arranged one in front of the other on the other side of the cavity along its length.

[0016] In the aforementioned electric door lock of the washing machine, the transmission mechanism includes a slider three and a spring three. The locking coil actuator is connected to the slider three. The spring three acts on the housing and the slider three. Under the elastic force of the spring three, the slider three tends to move away from the locking coil actuator. After the locking coil actuator is washed, the slider three moves away from the locking coil actuator under the action of the spring three.

[0017] In the aforementioned electric door lock for washing machines, the slider three has a recessed heart-shaped groove. The inner end of the pull rod is connected to the output end of the locking coil actuator, and the outer end of the pull rod abuts against the side wall of the heart-shaped groove. After the locking coil actuator is engaged, the pull rod disengages from the side wall of the heart-shaped groove, and the slider three moves away from the locking coil actuator under the elastic force of the spring three.

[0018] In the aforementioned electric door lock for a washing machine, the slider has three side walls with stepped recessed pushing grooves. The pushing grooves include a first contact portion at a higher position and a second contact portion at a lower position. The first contact portion and the second contact portion are smoothly transitioned. The lock also includes a limiting member. The limiting member has a protruding pin on its side, and the pin is embedded in the pushing groove.

[0019] In the aforementioned electric door lock for washing machines, the housing has a vertically arranged guide hole 1, the lower part of the aforementioned limiting member matches the guide hole 1 and is embedded in the guide hole 1, and the slider 1 has a recessed positioning hole, so that when the limiting member moves down, the lower end of the limiting member is embedded in the positioning hole.

[0020] In the aforementioned electric door lock for washing machines, the transmission mechanism two includes a first connecting rod, a second connecting rod, and a heart-shaped block that can self-lock and unlock. The inner end of the first connecting rod is connected to the electric opening coil actuator, the outer end of the first connecting rod is movably connected to the inner end of the second connecting rod, and the second connecting rod is connected to the heart-shaped block.

[0021] In the aforementioned electric door lock for a washing machine, the contact piece includes contact piece one and contact piece two, both of which are fixedly connected to the housing. Contact piece one is adjacent to a limiting member. Slider two is fixedly connected to slider one. Slider two has a stepped lifting part on its upper part. A push rod that can move up and down is also movably connected to the housing. The lower part of the push rod contacts the lifting part, and the upper part of the push rod is directly opposite to contact piece two.

[0022] In the aforementioned electric door lock for washing machines, the housing has a pin interface that connects to contact piece one, contact piece two, locking coil actuator, and electric opening coil actuator. The pin interface is located on the housing at one point of the cavity.

[0023] To achieve the second objective mentioned above, this utility model can be implemented through the following technical solutions:

[0024] A forced-opening structure for a washing machine door lock includes a cam and a slider. The cam is used to engage with a door hook, and the slider rests against the cam. The forced-opening structure is fixed to the slider and includes a body, a second body, a forced-opening spring, and a spring seat. The first body is hollow inside and open at the top. The second body is embedded in the first body. One end of the forced-opening spring rests against the inside of the first body, and the other end rests against the spring seat. The spring seat is detachably connected to the second body.

[0025] In the above-mentioned forced opening structure of the washing machine door lock, the outer side of the second body is a planar contact surface, the inner side of the first body is a planar contact surface, and the first contact surface and the second contact surface are in surface contact.

[0026] In the aforementioned forced-open structure of the washing machine door lock, the interior of the second body is a cavity, and the forced-open spring is partially embedded within the second body.

[0027] In the above-mentioned forced opening structure of the washing machine door lock, the main body has a protruding positioning head, and one end of the spring is sleeved on the positioning head.

[0028] In the above-mentioned forced opening structure of the washing machine door lock, the spring seat is cylindrical and passes through the body two. The spring seat is threadedly connected to the body two, and the other end of the spring is connected to the spring seat.

[0029] In the above-mentioned forced opening structure of the washing machine door lock, the spring seat includes a connecting section with external threads and a sleeve section that matches the inner diameter of the forced opening spring. The outer diameter of the connecting section is larger than the outer diameter of the sleeve section. The forced opening spring is sleeved on the sleeve section and the end of the forced opening spring abuts against the end of the connecting section.

[0030] In the aforementioned forced-open structure of the washing machine door lock, the socket section and the connecting section are an integral structure.

[0031] In the above-mentioned forced opening structure of the washing machine door lock, there is one forced opening spring, and the outer diameter of the forced opening spring is smaller than the inner cavity size of the main body.

[0032] In the aforementioned forced-open structure of the washing machine door lock, the first body has a protruding latching block at one end, and the second body is pressed tightly between the latching block and the bottom of the first body.

[0033] In the aforementioned forced-open structure of the washing machine door lock, the upper part of the latching block is an inclined guide surface, and the lower part of the latching block is a blocking surface that contacts two sides of the main body.

[0034] Compared with existing technologies, this washing machine's electric door lock integrates the electrical components of the electric opening and locking modules, as well as the contacts for electrical connection, into one cavity of the housing. The transmission mechanism two is located in cavity two, and the slider one is located in cavity three. It can be seen that the electrical and mechanical components are independently configured, effectively reducing mutual interference between them.

[0035] Meanwhile, the electrical and mechanical components located at the front and rear make the overall length of the door lock relatively large. Therefore, when installing it on a washing machine, this door lock no longer requires a large installation space, effectively reducing the space it occupies on the washing machine.

[0036] In addition, the movable slider during use is also designed separately, further avoiding interference between various components. Its stability is relatively high. Attached Figure Description

[0037] Figure 1 This is a 3D structural diagram of the washing machine with the electric door lock hidden in the casing.

[0038] Figure 2 This is a three-dimensional structural diagram of the connection between the electric switch module, the locking module, and the slider.

[0039] Figure 3 This is a 3D structural diagram of the electric door lock of this washing machine.

[0040] Figure 4 This is a three-dimensional structural diagram of one part of the slider.

[0041] Figure 5 This is a cross-sectional structural diagram of one part of the slider.

[0042] Figure 6 This is a schematic diagram of the structure when the cam is in contact with the slide plate before the door hook is inserted.

[0043] Figure 7 This is a schematic diagram of the structure when the cam contacts the sliding plate after the door hook is inserted.

[0044] Figure 8 This is a 3D structural diagram of the forced-open mechanism of a washing machine door lock.

[0045] Figure 9 This is a three-dimensional structural diagram of transmission mechanism one.

[0046] Figure 10 This is a three-dimensional structural diagram of transmission mechanism two.

[0047] Figure 11 This is a schematic diagram of the spring seat.

[0048] Figure 12 yes Figure 8 A schematic diagram of the local structure at point A.

[0049] Figure 13 yes Figure 1 A schematic diagram of the local structure at point B.

[0050] Figure 14 This is a cross-sectional structural diagram of the locking module.

[0051] In the picture:

[0052] 1. Housing; 2. Spring 1; 3. Slider 1; 31. Positioning Hole; 4. Cam; 5. Locking Coil Actuator; 6. Electrically Opening Coil Actuator; 7. Cavity 1; 8. Cavity 2; 9. Cavity 3; 10. Contact Plate 1; 11. Contact Plate 2; 12. Slider 3; 121. Heart-shaped Groove; 122. Push Groove; 1221. Contact Part 1; 1222. Contact Part 2; 13. Spring 3; 14. Pull Rod; 15. Limit Positioning components; 151. Pin; 16. Guide hole one; 17. Connecting rod one; 18. Connecting rod two; 19. Heart-shaped block; 20. Pin interface; 21. Body one; 22. Body two; 23. Forced opening spring; 24. Spring seat; 241. Connecting section; 242. Sleeve section; 25. Positioning head; 26. Fastening block; 261. Guide surface; 262. Blocking surface; 27. Torsion spring; 28. Slider two; 29. ​​Push rod. Detailed Implementation

[0053] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0054] like Figure 1-12 As shown, the electric door lock of this washing machine includes a housing 1, a contact plate, an electric opening module, a locking module, a slider 3, and a cam 4. The locking module includes a locking coil actuator 5 and a transmission mechanism 1. The electric opening module includes an electric opening coil actuator 6 and a transmission mechanism 2. The housing 1 has three cavities with hollow interiors, namely cavity 1 7, cavity 2 8, and cavity 3 9.

[0055] The electric opening coil actuator 6, the locking coil actuator 5, and the contact piece are all connected to cavity 7. The transmission mechanism 1 is located at cavity 7 and connects the locking coil actuator 5 to slider 3. The transmission mechanism 2 is connected to cavity 8 and connects the electric opening coil actuator 6 to slider 3.

[0056] The slider 3 is located at the cavity 9. A spring 2 is provided between the inner end of the slider 3 and the cavity 9. The cam 4 is hinged to the housing 1 and a torsion spring 27 is provided between the two. Under the elastic force of the torsion spring 27, the cam 4 tends to swing down to the point where the door hook is inserted. Under the elastic force of the spring 2, the slider 3 tends to abut against the cam 4. At this time, the slider 3 pushes the contact piece and puts it in the open state.

[0057] The contact piece includes a first contact piece 10 and a second contact piece 11, both of which are fixedly connected to the housing 1.

[0058] When the door is closed, the door hook engages with cam 4, causing cam 4 to swing at a set angle. After cam 4 swings (the direction of cam 4's swing is...), Figure 7The direction indicated by the arc-shaped arrow rotates, and slider 3 moves with the oscillating cam 4 under the elastic force of spring 2. After slider 3 moves (the direction of movement of slider 3 is...), Figure 7 (indicated by the direction of the straight arrow in the middle), the contact piece 11 is in a conductive state;

[0059] When the door is closed, the locking coil actuator 5 is energized and can lock the slider 3 through the transmission mechanism 1. When the opening coil actuator 6 is energized, it can unlock the slider 3 through the transmission mechanism 2.

[0060] In this washing machine's electric door lock, the electrical and mechanical parts are respectively located in independent cavities on the housing 1, which effectively avoids mutual interference between the electrical and mechanical parts and effectively improves the stability of the entire door lock.

[0061] In other words, the electrical components such as the electric opening coil actuator 6 of the electric opening module, the locking coil actuator 5 of the locking module, and the contact plate are independently installed in cavity 7 of the housing 1, while the mechanical transmission mechanism 2 is independently installed in cavity 8.

[0062] The movable slider 3 is independently set at cavity 39.

[0063] The entire door lock is separated as independently as possible to effectively avoid interference between different components.

[0064] Although the transmission mechanism of the mechanical part is located at cavity 7, and although there are electrical and mechanical parts at cavity 7, its drawbacks are not enough to seriously affect the normal use of the entire door lock.

[0065] After the locking module is activated, it can lock slider 3. Since slider 3 is pressed against cam 4, the inactive slider 3 indirectly locks cam 4, ensuring that the door lock is stably locked when the washing machine is closed.

[0066] After the electric opening module is activated, it can release the lock of slider 3. Since slider 3 is pressed against cam 4, cam 4 can rotate stably again under the action of external force, so that the washing machine door can be opened normally.

[0067] The aforementioned cavity 7 and cavity 8 are adjacent to each other on the left and right, and both are located on the upper part of the shell 1; cavity 9 is located on the lower part of the shell 1, and along the projection direction perpendicular to the shell 1, cavity 7 and cavity 8 are located at the two ends of cavity 9 respectively.

[0068] Because slider 3 is relatively large, it is connected separately to the largest cavity 9.

[0069] Cavity 1 7 and Cavity 2 8 are respectively located on the left and right sides of the upper part of Cavity 3, ensuring the compactness of the entire shell 1 while making reasonable use of the space of the shell 1.

[0070] The locking coil actuator 5 and the transmission mechanism are arranged one front to the other on one side of the cavity 7 along its length, while the contact piece 10 and the electric opening coil actuator 6 are arranged one front to the other on the other side of the cavity 7 along its length.

[0071] This structure allows the entire door lock to be elongated, which means it doesn't require a large space when installed on a washing machine, compared to more square door locks.

[0072] The transmission mechanism includes a slider 12 and a spring 13. The locking coil actuator 5 is connected to the slider 12. The spring 13 acts on the housing 1 and the slider 12. Under the elastic force of the spring 13, the slider 12 tends to move away from the locking coil actuator 5. After the locking coil actuator 5 is engaged, the slider 12 moves away from the locking coil actuator under the action of the spring 13.

[0073] The slider 12 has a recessed heart-shaped groove 121. The inner end of the pull rod 14 is connected to the output end of the locking coil actuator 5. The outer end of the pull rod 14 abuts against the side wall of the heart-shaped groove 121. After the locking coil actuator 5 is engaged, the pull rod 14 disengages from the side wall of the heart-shaped groove 121. Under the elastic force of the spring 13, the slider 13 moves away from the locking coil actuator 5.

[0074] In the initial state, the pull rod 14 is supported at the heart groove 121 of the slider 3 12. Once the locking coil actuator 5 is engaged, the pull rod 14 disengages from the heart groove 121 of the slider 3 12, and the slider 3 12 moves under the action of the spring 3 13.

[0075] The slider 12 has a stepped recessed pushing groove 122 on its side wall. The pushing groove 122 includes a first contact portion 1221 at a higher position and a second contact portion 1222 at a lower position. The first contact portion 1221 and the second contact portion 1222 are smoothly transitioned. It also includes a limiting member. The limiting member 15 has a protruding pin 151 on its side and the pin 151 is embedded in the pushing groove 122.

[0076] The first contact piece 10 is adjacent to the limiting member 15. The second slider 28 is fixedly connected to the first slider 3. The second slider 28 has a stepped lifting part on its upper part. The housing 1 is also movably connected to a push rod 29 that can move up and down. The lower part of the push rod 29 is in contact with the lifting part, and the upper part of the push rod 29 is directly opposite the second contact piece 11.

[0077] When contact 10 is turned on, it sends a lock signal. When contact 11 is turned on, it sends a door-closing signal.

[0078] The housing 1 has a vertically arranged guide hole 16. The lower part of the limiting member 15 matches the guide hole 16 and is embedded in the guide hole 16. The slider 3 has a recessed positioning hole 31. When the limiting member 15 moves down, the lower end of the limiting member 15 is embedded in the positioning hole 31.

[0079] When the pin 151 on the limiting member 15 is engaged at the lower contact portion 1222, the limiting member 15 moves downward, and the contact piece 10 becomes conductive after the limiting member 15 moves downward. At the same time, the limiting member 15 is inserted into the slider 3 and locked.

[0080] When the pin 151 on the limiting member 15 is engaged at the high contact portion 1221, the limiting member 15 moves upward, and the contact piece 10 disengages after the limiting member 15 moves upward. At the same time, the limiting member 15 disengages from the slider 3, at which point the slider 3 can move again.

[0081] The transmission mechanism 2 includes a first connecting rod 17, a second connecting rod 18, and a heart-shaped block 19 that can self-lock and unlock. The inner end of the first connecting rod 17 is connected to the electric coil actuator 6, and the outer end of the first connecting rod 17 is movably connected to the inner end of the second connecting rod 18. The second connecting rod 18 is connected to the heart-shaped block 19.

[0082] After the electric coil actuator 6 drives the first connecting rod 17 to move, the second connecting rod 18 changes the state of the heart-shaped block 19 during the movement.

[0083] In washing machine door locks (especially the automatic door lock mechanism of drum washing machines), the "heart-shaped block" (also known as a peach-shaped cam, heart-shaped lock block, or camlock piece) is a key mechanical self-locking and unlocking linkage component. Its special contour design enables reliable locking, prevention of accidental opening, and safe release in the event of a power outage.

[0084] Since the heart-shaped block 19 is existing technology, the specific technical features of the heart-shaped block will not be described again in the embodiments.

[0085] It can be seen that after the coordinated action of link 17 and link 28, the heart-shaped block 19 can achieve self-locking or unlocking after generating the corresponding action.

[0086] The housing 1 has a pin interface 20 that is connected to the first contact 10, the second contact 11, the locking coil actuator 5 and the electric opening coil actuator 6. The pin interface 20 is located on the housing 1 at the cavity 7.

[0087] The 20 pin interfaces are centrally located for easy connection of interface harnesses.

[0088] The washing machine door lock includes a cam 4 and a slider 3. The cam 4 is used to engage with the door hook, and the slider 3 abuts against the cam 4.

[0089] The door lock of this washing machine has a forced-opening mechanism fixed to the slider 3, including a body 21, a second body 22, a forced-opening spring 23, and a spring seat 24. The body 21 has a hollow interior and an open top. The second body 22 is embedded in the body 21. One end of the forced-opening spring 23 abuts against the body 21, and the other end of the forced-opening spring 23 abuts against the spring seat 24. The spring seat 24 is detachably connected to the second body 22.

[0090] The assembly sequence of this forced-opening door structure is as follows:

[0091] Body 22 is inserted into body 1 21. The two ends of the forced opening spring 23 are connected to body 1 21 and spring seat 24 respectively. Then, spring seat 24 is connected to body 22.

[0092] During installation, since both ends of the forced opening spring 23 are positioned, it is only necessary to thread the spring seat 24 with the forced opening spring 23 onto the main body 22.

[0093] The outer side of the second body 22 is a planar contact surface 2, and the inner side of the first body 21 is a planar contact surface 1. The first contact surface and the second contact surface are in surface contact.

[0094] Main body 1 21 and main body 22 maintain surface contact, which can prevent main body 22 from becoming loose relative to main body 1 21 after assembly.

[0095] The interior of the second body 22 is a cavity, and the aforementioned forced opening spring 23 is partially embedded inside the second body 22.

[0096] The forced opening spring 23 is embedded in the main body 22, which reduces the space occupied by the forced opening spring 23.

[0097] The main body 21 has a protruding positioning head 25, and one end of the aforementioned forced opening spring 23 is sleeved on the positioning head 25.

[0098] After the positioning head 25 is embedded in the forced opening spring 23, it can stably position one end of the forced opening spring 23.

[0099] The spring seat 24 is cylindrical and passes through the body 22. The spring seat 24 is threadedly connected to the body 22. The other end of the forced opening spring 23 is connected to the spring seat 24.

[0100] The spring seat 24 includes a connecting section 241 with external threads and a sleeve section 242 that matches the inner diameter of the forced opening spring 23. The outer diameter of the connecting section 241 is larger than the outer diameter of the sleeve section 242. The forced opening spring 23 is sleeved on the sleeve section 242 and the end of the forced opening spring 23 abuts against the end of the connecting section 241.

[0101] After the connecting section 241 is inserted into the second body 22, the two are connected by threads, thus ensuring that the spring seat 24 is stably connected to the second body 22.

[0102] The inner diameter of the socket section 242 is matched with that of the forced opening spring 23, which can ensure that the forced opening spring 23 is stably connected to the spring seat 24.

[0103] The socket section 242 and the connecting section 241 are an integral structure.

[0104] This can appropriately improve the structural compactness of the spring seat 24.

[0105] The number of forced opening springs 23 is one, and the outer diameter of the forced opening spring 23 is smaller than the inner cavity size of the body 22.

[0106] The single forced opening spring 23 reduces the amount of assembly work and lowers the assembly difficulty while ensuring stability.

[0107] The first body 21 has a protruding fastening block 26 at its port, and the second body 22 is pressed tightly between the fastening block 26 and the bottom of the first body 21.

[0108] The upper part of the fastening block 26 is an inclined guide surface 261, and the lower part of the fastening block 26 is a blocking surface 262 that contacts the surface of the body 22.

[0109] After the second body 22 passes over the fastening block 26 along the guide surface 261, it can be stably positioned within the first body 21 under the action of the blocking surface 262.

[0110] There are several fastening blocks 26. Multiple fastening blocks 26 can effectively improve the connection stability between body one 21 and body two 22.

[0111] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0112] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A washing machine electric door lock, comprising a housing, contact plate, electric opening module, locking module, slider, and cam, characterized in that, The locking module includes a locking coil actuator and a transmission mechanism one; the electric unlocking module includes an electric unlocking coil actuator and a transmission mechanism two; the housing has three internally hollow cavities, namely cavity one, cavity two, and cavity three. The electric opening coil actuator, the locking coil actuator, and the contact piece are all connected to one cavity. The first transmission mechanism is located in one cavity and connects the locking coil actuator to the first slider. The second transmission mechanism is connected to the second cavity and connects the electric opening coil actuator to the first slider. The slider is located at the cavity three. A spring is provided between the inner end of the slider and the cavity three. The cam is hinged to the housing and a torsion spring is provided between the two. Under the elastic force of the torsion spring, the cam tends to swing down to the point where the door hook is inserted. Under the elastic force of the spring, the slider tends to abut against the cam. At this time, the slider pushes the contact piece and puts it in the open state. When the door is closed, the door hook can swing the cam at a set angle after it is engaged. After the cam swings, the slider moves with the swinging cam under the elastic force of the spring. After the slider moves, the contact piece is in the conductive state. When the door is closed, the locking coil actuator, when energized, can lock the slider 1 through transmission mechanism 1; when the opening coil actuator, when energized, can unlock the slider 1 through transmission mechanism 2.

2. The washing machine electric door lock according to claim 1, characterized in that, The aforementioned cavity one and cavity two are adjacent to each other on the left and right, and both are located on the upper part of the shell; cavity three is located on the lower part of the shell, and along the projection direction perpendicular to the shell, cavity one and cavity two are located at the two ends of cavity three respectively.

3. The washing machine electric door lock according to claim 1, characterized in that, The locking coil actuator and the transmission mechanism are arranged one in front of the other on one side of the cavity along its length, while the contact plate and the electric switching coil actuator are arranged one in front of the other on the other side of the cavity along its length.

4. The washing machine electric door lock according to claim 1, 2, or 3, characterized in that, The transmission mechanism includes a slider three and a spring three. The locking coil actuator is connected to the slider three. The spring three acts on the housing and the slider three. Under the elastic force of the spring three, the slider three tends to move away from the locking coil actuator. After the locking coil actuator moves away, the slider three moves away from the locking coil actuator under the action of the spring three.

5. The washing machine electric door lock according to claim 4, characterized in that, The slider three has a recessed heart-shaped groove. The inner end of the pull rod is connected to the output end of the locking coil actuator. The outer end of the pull rod abuts against the side wall of the heart-shaped groove. After the locking coil actuator is engaged, the pull rod disengages from the side wall of the heart-shaped groove. Under the elastic force of the spring three, the slider three moves away from the locking coil actuator.

6. The washing machine electric door lock according to claim 5, characterized in that, The slider has three side walls with stepped recessed pushing grooves. The pushing grooves include a first contact part at a high position and a second contact part at a low position. The first contact part and the second contact part are smoothly transitioned. The slider also includes a limiting member. The side of the limiting member has a protruding pin and the pin is embedded in the pushing groove.

7. The washing machine electric door lock according to claim 6, characterized in that, The housing has a vertically arranged guide hole. The lower part of the limiting member matches the guide hole and is embedded in the guide hole. The slider has a recessed positioning hole. When the limiting member moves down, the lower end of the limiting member is embedded in the positioning hole.

8. The electric door lock for a washing machine according to claim 1, 2, or 3, characterized in that, The transmission mechanism 2 includes a first connecting rod, a second connecting rod, and a heart-shaped block that can be self-locked and unlocked. The inner end of the first connecting rod is connected to an electric coil actuator, the outer end of the first connecting rod is movably connected to the inner end of the second connecting rod, and the second connecting rod is connected to the heart-shaped block.

9. The electric door lock for a washing machine according to claim 1, 2, or 3, characterized in that, The contact piece includes a first contact piece and a second contact piece, both of which are fixedly connected to the housing. The first contact piece is adjacent to the limiting member. The second slider is fixedly connected to the first slider. The upper part of the second slider has a stepped lifting part. A push rod that can move up and down is also movably connected to the housing. The lower part of the push rod is in contact with the lifting part, and the upper part of the push rod is directly opposite the second contact piece.

10. The electric door lock for a washing machine according to claim 9, characterized in that, The housing has a pin interface that connects to contact plate one, contact plate two, locking coil actuator and electric opening coil actuator. The pin interface is located on the housing at one part of the cavity.

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