Door lock for roller washing machine

Abstract

The utility model provides a door lock for a roller washing machine, which belongs to the technical field of roller washing machines, overcomes the technical defect that the conventional door lock for the roller washing machine cannot be locked and unlocked forcefully, comprises a base body, and is characterized in that a locking body capable of clamping a door hook of the washing machine through elastic rotation is mounted on the base body; a locking plate capable of clamping and jacking one end of the locking body through up-down elastic movement is arranged on the side, away from a washing machine door hook, of the locking body, a sliding pin column is arranged on the side, close to the base body, of the locking plate, and the sliding pin column is installed in a sliding groove of the transmission plate in an up-down sliding mode. The transmission plate is connected with a cam installed at the output end of the motor in a left-right sliding mode, the cam drives the transmission plate to slide left and right, and the transmission plate drives the locking plate to move up and down so that the locking body can be locked to lock or unlock the washing machine door hook. The door lock can be mechanically opened or closed; the door lock can be forcibly pulled open during power failure, and the door lock is protected.

Description

Technical Field

[0001] This utility model belongs to the field of drum washing machine technology, and specifically relates to a door lock for drum washing machines. Background Technology

[0002] The working principle of the door lock structure disclosed in Chinese Patent Document No. 200720125731.4 and Japanese Patent No. 4038546 and Japanese Unexamined Patent No. 2005-137508 is as follows: the bolt is inserted into the door lock, pushing the locking plate to move. After the bolt is inserted to a certain depth, the locking plate, under the action of the return spring, pushes the locking plate into the bolt's window, thus positioning the bolt and closing the door. When it is necessary to open the door, a button on the housing is pressed. The hook connected to the button pulls the lever on the door lock device. The lever causes the locking plate to exit the bolt's window, thus opening the door.

[0003] The opening design of this type of door locking device requires a separate button mechanism and corresponding connecting parts, making it structurally complex. Furthermore, a mechanical failure in the button mechanism can prevent the door from opening. Additionally, in the case of large-capacity washing machines, if a child accidentally enters the inner drum to play, the child may be unable to push the door open from inside the drum after it's closed, posing a safety hazard in such an unexpected situation.

[0004] Application No. 03144503.9 discloses a door lock device for a dryer. When closing the door, the inclined surface at the front of the hook pushes open the support inside the door lock, guiding the hook into the lock. The support, under the action of a spring, engages with the hook's recess, thus maintaining the closed position. When opening the door, simply pull the door; the inclined surface at the front of the hook's recess pushes open the support again, opening the door. This type of door lock device is suitable for situations where there is no significant load between the door cover and the cabinet when the door is closed. However, if the rebound force when opening the door is large, the hook is prone to disengagement. To prevent this, the spring pressure needs to be increased. However, if the spring pressure is increased excessively, the operating force for hook entry and exit becomes unstable, especially after prolonged use as the inclined surface pushes open the support, leading to aging and wear on the sliding surfaces of the hook and support. Because front-loading washing machines contain hot water during operation, a relatively high pressure needs to be maintained between the door and the cabinet to prevent water leakage. Therefore, this type of door lock device is not suitable for front-loading washing machines.

[0005] In Chinese patent literature, there is an authorized document with publication number CN102094305B entitled "Door Lock Device". This document describes a door lock device that can be directly opened by pulling a door. It includes a base (1) and its connected housing (2). The base has a locking body (3) with a pivot. The locking body has a pressure block (301), a lock hook (302), a rotation limit block I (303), and a rotation limit block II (304). A rotation torsion spring (4) is installed on the pivot of the locking body. The base has a movable locking plate (5). A return spring I (6) is provided between the locking plate and the housing. The front end (502) of the locking plate contacts the rotation limiting block II (304) of the locking body under the action of the return spring I and the rotation torsion spring. The base has a receiving space (103), in which a return spring II (7) is provided. One end of the return spring II (7) contacts the bottom (1031) of the receiving space, and the other end contacts the locking plate. The locking plate has a sliding surface (503), which corresponds to the sliding surface (104) on the base. This invention is suitable as a door lock device for a drum washing machine.

[0006] However, the above solution cannot achieve strong locking and unlocking of the door lock through electric automatic means. Forced opening when the power is off can easily damage internal components, which is a technical problem that we urgently need to solve. Utility Model Content

[0007] The purpose of this utility model is to provide a door lock for a drum washing machine and a pulsator washing machine therewith, so as to solve the above-mentioned technical problems existing in the prior art.

[0008] According to the above objectives, the basic technical solution of this utility model is as follows: a door lock for a drum washing machine, comprising a base, characterized in that: a locking body is installed on the base, which can engage the washing machine door hook by elastic rotation; a locking plate is provided on the side of the locking body away from the washing machine door hook, which can engage one end of the locking body by elastic up and down movement; a sliding pin is provided on the side of the locking plate near the base; the sliding pin is installed in the sliding groove of the transmission plate; the transmission plate is slidably connected to a cam installed at the output end of the motor; the rotation of the motor drives the cam to rotate, the cam drives the transmission plate to slide left and right, and the transmission plate drives the locking plate to move up and down to lock the locking body to lock or unlock the washing machine door hook.

[0009] Furthermore, a second locking plate is provided parallel to one side of the locking plate, which can support the middle part of the locking body at one end. The other end of the second locking plate is rotatably connected to one end of the second transmission plate. The other end of the second transmission plate can slide left and right and engage with the operating shaft that can move up and down.

[0010] Furthermore, when the washing machine is powered off, the door hook, under strong outward pulling, can cause one end of the locking body to rotate outward, while the middle part of the other end of the locking body rotates in the opposite direction towards the base. At the same time, one end of the inner pressure locking plate flips towards the base, and the other end of the locking plate drives the transmission plate to rotate outward. The locking plate has a ramp fulcrum near the base. While one end of the locking plate rotates towards the base, it also moves backward. The middle part of the other end of the locking body can flip and slide under the other end of the locking plate. When the washing machine door hook is fully pulled out, the locking body can remain in a flipped state under the action of the spring, without damaging the door lock.

[0011] Furthermore, the tail end of the transmission plate two is provided with a V-shaped sliding surface, and the operating shaft is provided with a smooth circular surface that can slide in contact with the V-shaped sliding surface.

[0012] More specifically, when the operating shaft moves up and down, it slides on the surface of the operating shaft through the V-shaped sliding surface, which drives the transmission plate two to move left and right, and drives the locking plate two to move left and right, causing the locking body to rotate in the opposite direction, so as to close or open the washing machine door hook.

[0013] Furthermore, a ramp is provided between the cam and the transmission plate, which can push the transmission plate to move to the left when the cam rotates clockwise.

[0014] Furthermore, the groove of the transmission plate is set at a 45-degree angle to the horizontal direction.

[0015] The aforementioned door lock for a drum washing machine has a rotating torsion spring on the locking body for opening the washing machine door hook direction.

[0016] The door lock for the aforementioned drum washing machine has a compression spring on the locking plate that moves away from the locking body.

[0017] The aforementioned door lock for a drum washing machine includes a compression spring on the transmission plate 2 that allows the locking plate 2 to move to the left to ensure that the locking body engages with the washing machine door hook.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0019] 1. The product of this utility model has a locking plate on the side of the locking body away from the washing machine door hook, which can be locked at one end of the locking body by elastic up and down movement. The locking plate has a sliding pin on the side near the base. The sliding pin is installed in the slide groove of the transmission plate and can slide left and right. The transmission plate is connected to a cam installed at the output end of the motor. The rotation of the motor drives the cam to rotate, the cam drives the transmission plate to slide left and right, and the transmission plate drives the locking plate to move up and down to lock the locking body to lock or unlock the washing machine door hook. It can be set in the washing machine program to automatically lock and unlock the washing machine door lock, realizing automatic control. It can also realize strong locking to ensure that the door cannot be opened when the washing machine is working normally, thus protecting the washing machine and the surrounding environment.

[0020] 2. The product of this utility model has a second locking plate parallel to one side of the locking plate, which can support the middle part of the locking body at one end. The other end of the second locking plate is rotatably connected to one end of the transmission plate. The other end of the transmission plate can slide left and right and engage with the operating shaft that can move up and down, so as to realize the mechanical opening or closing of the door lock.

[0021] 3. The product of this utility model has a rotating torsion spring on the locking body to open the direction of the washing machine door hook, a compression spring on the locking plate to disengage from the direction of the locking body, and a compression spring on the transmission plate two to move the locking plate two to the left to ensure that the locking body is engaged with the washing machine door hook. After the external force of electric and mechanical locking is lost, the washing machine door hook can be pulled open to unlock the door lock without damaging the door lock. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the product of this utility model;

[0023] Figure 2 This is a front view of the product with the casing removed.

[0024] Figure 3 This is a top view of the structure of the product of this utility model;

[0025] Figure 4 This is a schematic diagram of the left-side structure of the product of this utility model;

[0026] Figure 5 This is a rear view structural diagram of the product of this utility model;

[0027] Figure 6 for Figure 3 A schematic diagram of the EE cross-sectional structure;

[0028] In the diagram: 1. Base; 2. Washing machine door hook; 3. Locking body; 4. Locking plate; 5. Sliding pin; 6. Transmission plate; 7. Slide groove; 8. Motor; 9. Cam; 10. Locking plate two; 11. Transmission plate two; 12. Operating shaft; 13. Rotary torsion spring; 14. Compression spring. Detailed Implementation

[0029] Combination Figures 1 to 6 This is a schematic diagram illustrating the principle and structure of an embodiment of a door lock for a drum washing machine according to this utility model.

[0030] Example 1: Electric closing and unlocking

[0031] This drum washing machine door lock includes a base 1, on which a locking body 3 is installed. The base 1 can be elastically rotated to engage the washing machine door hook 2. The locking body 3 has a rotating torsion spring 13 for opening the washing machine door hook 2. On the side of the locking body 3 away from the washing machine door hook 2, there is a locking plate 4 that can be elastically moved up and down to engage one end of the locking body 3. The locking plate 4 has a compression spring 14 for disengaging from the locking body 3. On the side of the locking plate 4 near the base 1, there is a sliding pin 5. The sliding pin 5 is slidably installed in a groove 7 of a transmission plate 6. The groove 7 of the transmission plate 6 is set at a 45-degree angle to the horizontal. The transmission plate 6 can slide left and right and is connected to a cam 9 installed at the output end of a motor 8. A ramp is provided between the cam 9 and the transmission plate 6. When the cam 9 rotates clockwise, it pushes the transmission plate 6 to move to the left. The rotation of the motor 8 drives the cam 9 to rotate, causing the transmission plate 6 to slide left and right. The transmission plate 6 then causes the locking plate 4 to move up and down, locking the locking body 3 to lock or unlock the washing machine door hook 2.

[0032] When the washing machine is in operation, the washing machine door lock should be locked. At this time, the washing machine door hook 2 cannot be pulled out from the locking body 3. This is for the safety of the washing machine. In specific operation, the motor 8 is powered on and rotates under the instruction of the program, driving the cam 9 to rotate clockwise. The cam 9 pushes the transmission plate 6 forward through the inclined surface set at the top. The two sides of the transmission plate 6 are restricted and cannot move up and down, but can only move to the left. The sliding pin 5 of the locking plate 4 near the base 1 is pushed by the left and right forces in the sliding groove 7 in the transmission plate 6. The sliding pin 5 can only move along the sliding groove 7. Since the sliding groove is set at 45 degrees, the locking plate 4 can only move upward when it cannot move left and right. The pawl at its left end moves upward and presses against the lower right end of the locking body 3 near the base 1. Through the lever or seesaw principle, the locking body 3, with the rotating shafts at both ends in the middle as the fulcrum, rises at the right end and can only descend at the left end, strongly pressing the washing machine door hook 2. At this time, the washing machine door hook 2 is locked and cannot be opened.

[0033] If motor 8 rotates in the opposite direction, the door lock can also be opened, meaning the washing machine door hook 2 can be pulled open under external force.

[0034] If the power is cut off in this state, the motor 8 will lose power, the cam 9 will lose power and will no longer push the transmission plate 6 forward. Since the locking plate 4 is provided with a compression spring 14 that is disengaged from the locking body 3, when the external force is lost, the elastic force of the compression spring 14 will push the locking plate 4 downward in the opposite direction, and the pawl at its left end will move downward and disengage from the locking body 3. After the external force is lost, the locking body 3 will be pushed to rotate clockwise under the rotational force of the rotating torsion spring 13, and the locking body 3 will be unlocked from the washing machine door hook 2. The washing machine door hook 2 can also be forcefully opened by external force.

[0035] Example 2: Mechanical locking and unlocking

[0036] A door lock for a drum washing machine includes a base 1. A locking body 3 is mounted on the base 1, which can engage with a washing machine door hook 2 via elastic rotation. The locking body 3 is equipped with a torsion spring 13 for opening the washing machine door hook 2. A second locking plate 10 is located on the side of the locking body 3 away from the washing machine door hook 2, with one end supporting the middle portion of the locking body 3. The other end of the second locking plate 10 is rotatably connected to one end of a second transmission plate 11. The second transmission plate 11 is equipped with a mechanism for the second locking plate 10 to move to the left to ensure that the locking body 3 engages with the washing machine door. The compression spring 14 is engaged with the hook 2. The other end of the transmission plate 11 can slide left and right and engage with the operating shaft 12 which can move up and down. The tail end of the transmission plate 11 is provided with a V-shaped sliding surface. The operating shaft 12 is provided with a smooth circular surface that can slide in contact with the V-shaped sliding surface. When the operating shaft 12 moves up and down, it slides on the surface of the operating shaft 12 through the V-shaped sliding surface, which drives the transmission plate 11 to move left and right, and drives the locking plate 10 to move left and right, which drives the locking body 3 to rotate in the opposite direction, so as to close or open the washing machine door hook 2.

[0037] When the washing machine is powered off, the washing machine door hook 2, under the strong outward pulling action, can drive one end of the locking body 3 to rotate outward, while the middle part of the other end of the locking body 3 rotates in the opposite direction towards the base 1. At the same time, one end of the inner pressure locking plate 2 10 flips towards the base 1, and the other end of the locking plate 2 10 drives the transmission plate 2 11 to rotate outward. The locking plate 2 10 is provided with a ramp fulcrum near the base 1. While one end of the locking plate 2 10 rotates towards the base 1, it also moves backward. The middle part of the other end of the locking body 3 can flip and slide under the other end of the locking plate 2 10. When the washing machine door hook 2 is fully pulled out, the locking body 3 can remain in a flipped state under the action of the spring, without damaging the door lock.

[0038] Example 3: Two Operation Methods - Electric Motor and Mechanical

[0039] A door lock for a drum washing machine includes a base 1. A locking body 3, which can engage the washing machine door hook 2 by elastic rotation, is mounted on the base 1. The locking body 3 has a rotating torsion spring 13 that opens the washing machine door hook 2. A locking plate 4, which can be engaged at one end of the locking body 3 by elastic up-and-down movement, is located on the side of the locking body 3 away from the washing machine door hook 2. A compression spring 14, which disengages from the locking body 3, is located on the side of the locking plate 4 closest to the base 1. The sliding pin 5 is slidably mounted in a groove 7 of a transmission plate 6. The groove 7 of the transmission plate 6 is set at a 45-degree angle to the horizontal. The transmission plate 6 is slidably connected to a cam 9 mounted on the output end of a motor 8. A ramp is provided between the cam 9 and the transmission plate 6. When the cam 9 rotates clockwise, it pushes the transmission plate 6 to the left. The rotation of the motor 8 drives the cam 9 to rotate, causing the transmission plate 6 to slide left and right. The transmission plate 6 then causes the locking plate 4 to move up and down, locking the locking body 3 to lock or unlock the washing machine door hook 2.

[0040] The locking plate 4 is also provided with a second locking plate 10 on one side, which can support the middle part of the locking body 3. The other end of the second locking plate 10 is rotatably connected to one end of the transmission plate 11. The transmission plate 11 is provided with a compression spring 14 that moves the second locking plate 10 to the left to ensure that the locking body 3 is engaged with the washing machine door hook 2. The other end of the transmission plate 11 can slide left and right and engage with the operating shaft 12 that can move up and down. The tail end of the transmission plate 11 is provided with a V-shaped sliding surface. The operating shaft 12 is provided with a circular smooth surface that can slide in contact with the V-shaped sliding surface. When the operating shaft 12 moves up and down, the V-shaped sliding surface slides on the surface of the operating shaft 12, which drives the transmission plate 11 to move left and right, and drives the second locking plate 10 to move left and right, which drives the locking body 3 to rotate in the opposite direction to close or open the washing machine door hook 2.

[0041] When the washing machine is in operation, the washing machine door lock should be locked. At this time, the washing machine door hook 2 cannot be pulled out from the locking body 3. This is for the safety of the washing machine. In specific operation, the motor 8 is powered on and rotates under the instruction of the program, driving the cam 9 to rotate clockwise. The cam 9 pushes the transmission plate 6 forward through the inclined surface set at the top. The two sides of the transmission plate 6 are restricted and cannot move up and down, but can only move to the left. The sliding pin 5 of the locking plate 4 near the base 1 is pushed by the left and right forces in the sliding groove 7 in the transmission plate 6. The sliding pin 5 can only move along the sliding groove 7. Since the sliding groove is set at 45 degrees, the locking plate 4 can only move upward when it cannot move left and right. The pawl at its left end moves upward and presses against the lower right end of the locking body 3 near the base 1. Through the lever or seesaw principle, the locking body 3, with the rotating shafts at both ends in the middle as the fulcrum, rises at the right end and can only descend at the left end, strongly pressing the washing machine door hook 2. At this time, the washing machine door hook 2 is locked and cannot be opened.

[0042] If motor 8 rotates in the opposite direction, the door lock can also be opened, meaning the washing machine door hook 2 can be pulled open under external force.

[0043] If power is lost in this state, motor 8 loses power, cam 9 loses power and no longer pushes transmission plate 6 forward. Since the locking plate 4 is equipped with a compression spring 14 that disengages from the locking body 3, under the absence of external force, the elastic force of the compression spring 14 pushes the locking plate 4 downward, and the pawl at its left end moves downward, disengaging from the locking body 3. After the external force is lost, the locking body 3 is pushed to rotate clockwise under the rotational force of the rotating torsion spring 13, and the locking body 3 is unlocked from the washing machine door hook 2. Under the strong outward pulling action, the washing machine door hook 2 can drive the locking body. 3. One end of the locking body 3 rotates outward, while the middle part of the other end rotates in the opposite direction towards the base 1. At the same time, one end of the inner pressure locking plate 10 flips towards the base 1. The other end of the locking plate 10 drives the transmission plate 11 to rotate outward. The locking plate 10 is provided with a ramp fulcrum near the base 1. While one end of the locking plate 10 rotates towards the base 1, it also moves backward. The middle part of the other end of the locking body 3 can flip and slide under the other end of the locking plate 10. When the washing machine door hook 2 is fully pulled out, the locking body 3 can remain in a flipped state under the action of the spring, and the door lock will not be damaged.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0045] Although this document frequently uses terms such as: 1. base; 2. washing machine door hook; 3. locking body; 4. locking plate; 5. sliding pin; 6. transmission plate; 7. slide groove; 8. motor; 9. cam; 10. second locking plate; 11. second transmission plate; 12. operating shaft; 13. rotary torsion spring; 14. compression spring, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0046] The above describes the door lock for a drum washing machine provided by this utility model. Specific preferred embodiments have been used to illustrate the principle and implementation of this utility model. These embodiments are only used to help understand the principle and core idea of ​​this utility model. It should be noted that for those skilled in the art, the implementation schemes in the above embodiments can be further combined or replaced without departing from the design concept of this utility model, and several improvements and modifications can be made to this utility model. These improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A door lock for a drum washing machine, comprising a base (1), characterized in that: The base (1) is equipped with a locking body (3) that can engage the washing machine door hook (2) by elastic rotation. On the side of the locking body (3) away from the washing machine door hook (2), there is a locking plate (4) that can engage one end of the locking body (3) by elastic up and down movement. On the side of the locking plate (4) near the base (1), there is a sliding pin (5). The sliding pin (5) is installed in the sliding groove (7) of the transmission plate (6) by sliding up and down. The transmission plate (6) can slide left and right and is connected to the cam (9) installed at the output end of the motor (8). The cam (9) is rotated by the rotation of the motor (8), and the cam (9) drives the transmission plate (6) to slide left and right. The transmission plate (6) drives the locking plate (4) to move up and down to lock the locking body (3) to lock or unlock the washing machine door hook (2).

2. The door lock for a drum washing machine according to claim 1, characterized in that: On one side of the locking plate (4), there is a second locking plate (10) that can support the middle part of the locking body (3) at one end. The other end of the second locking plate (10) is rotatably connected to one end of the transmission plate (11). The other end of the transmission plate (11) can slide left and right and engage with the operating shaft (12) that can move up and down.

3. The door lock for a drum washing machine according to claim 2, characterized in that: When the washing machine is powered off, the washing machine door hook (2) is pulled outward with a strong force, and the door hook (2) can drive one end of the locking body (3) to rotate outward. The middle part of the other end of the locking body (3) rotates in the opposite direction towards the base (1). At the same time, one end of the inner pressure locking plate (10) flips towards the base (1), and the other end of the locking plate (10) drives the transmission plate (11) to rotate outward. The locking plate (10) is provided with a ramp fulcrum near the base (1). While one end of the locking plate (10) rotates towards the base (1), it also moves backward. The middle part of the other end of the locking body (3) can flip and slide to the bottom of the other end of the locking plate (10). When the washing machine door hook (2) is fully pulled out, the locking body (3) can remain in a flipped state under the action of the spring, and the door lock will not be damaged.

4. The door lock for a drum washing machine according to claim 2, characterized in that: The tail end of the transmission plate 2 (11) is provided with a V-shaped sliding surface, and the operating shaft (12) is provided with a circular smooth surface that can slide in contact with the V-shaped sliding surface.

5. The door lock for a drum washing machine according to claim 4, characterized in that: When the operating shaft (12) moves up and down, it slides on the surface of the operating shaft (12) through the V-shaped sliding surface, which drives the transmission plate (11) to move left and right, and drives the locking plate (10) to move left and right, which drives the locking body (3) to rotate in the opposite direction, so as to close or open the washing machine door hook (2).

6. The door lock for a drum washing machine according to claim 1, characterized in that: A ramp is provided between the cam (9) and the transmission plate (6), and when the cam (9) rotates clockwise, it can push the transmission plate (6) to move to the left.

7. The door lock for a drum washing machine according to claim 1, characterized in that: The groove (7) of the transmission plate (6) is set at 45 degrees to the horizontal direction.

8. The door lock for a drum washing machine according to any one of claims 1 to 7, characterized in that: The locking body (3) is provided with a rotating torsion spring (13) in the direction of opening the washing machine door hook (2).

9. The door lock for a drum washing machine according to any one of claims 1 to 7, characterized in that: The locking plate (4) is provided with a compression spring (14) that is disengaged from the locking body (3).

10. The door lock for a drum washing machine according to any one of claims 2 to 5, characterized in that: The transmission plate 2 (11) is provided with a compression spring (14) that moves the locking plate 2 (10) to the left to ensure that the locking body (3) engages with the washing machine door hook (2).

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