Automatic ejection mechanism for door body and household appliance

Abstract

The utility model relates to the technical field of household electrical appliance door opening structures, and provides an automatic ejection mechanism for a door body and a household electrical appliance, the automatic ejection mechanism for the door body comprises a driver and an ejection rod doing axial telescopic motion, and the driver is provided with a driving shaft in transmission connection with the ejection rod; the driver is started in the unlocking state of the household appliance door body so as to trigger the ejector rod to axially stretch out and push the household appliance door body to be opened. Through transmission cooperation between the driver and the ejector rod, linear ejection of the ejector rod is triggered at the moment when the door lock of the household appliance is released, seamless connection of actions of unlocking and pushing the door body of the household appliance is achieved, and manual force application operation is omitted. Through combination of the lock catch for vertical movement of the household appliance door body and the door lock driver used for triggering the lock catch to be separated from the lock seat, automatic unlocking action of the household appliance is achieved, manual force application operation for opening the household appliance door body for unlocking is avoided, manual force application is not needed in the process from unlocking to opening of the household appliance door body, and user experience is improved. Performance of household appliances is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of door opening structures for household appliances, specifically to an automatic push-out mechanism for a door and a household appliance. Background Technology

[0002] Traditional household appliances, such as dishwashers, microwave ovens, and sterilizers, typically use mechanical locking mechanisms for their doors, requiring manual force from the user to open and close. While this design meets basic functional needs in typical use cases, its limitations are becoming increasingly apparent as users demand smarter and more convenient appliances. For example, when users need to hold tableware or cleaning tools with both hands after cooking, it's often difficult to free up one hand to pull the door open. Furthermore, in dishwashers, the high-temperature steam condensation during washing creates a negative pressure adsorption effect. In dishwashers, microwave ovens, and sterilizers, aging of the sealing strips can cause them to become too tight, significantly increasing the pulling force required to open the door—potentially exceeding the strength of elderly users or children.

[0003] Therefore, it is necessary to design an automatic ejection mechanism for the door. Utility Model Content

[0004] This utility model proposes an automatic push-out mechanism for doors and a household appliance. Through the transmission cooperation between the driver and the push rod, the push rod is triggered to push out linearly at the moment the lock of the household appliance is released, realizing a seamless connection between unlocking and pushing open the door of the household appliance, eliminating the need for manual force operation.

[0005] An automatic ejection mechanism for a door designed for this purpose includes a driver and an ejector rod that performs axial telescopic movement. The driver is provided with a drive shaft that is drively connected to the ejector rod.

[0006] The actuator is activated when the door changes from a closed state to an open state, triggering the top rod to extend axially and push the door of the household appliance to open.

[0007] The push rod is equipped with a transmission component that cooperates with the drive shaft. A threaded transmission structure is provided between the transmission component and the drive shaft. During the rotation of the drive shaft, the transmission component moves axially along the drive shaft and drives the push rod to move axially.

[0008] The transmission component is fixed to the top rod, and the transmission component and the top rod are integrally formed, or the transmission component is detachably installed and fixed to the top rod.

[0009] The drive shaft and / or push rod are mounted on the fixed base, and the drive shaft and push rod are arranged on the fixed base along the length direction of the fixed base.

[0010] The fixed base is provided with a cavity for the axial extension and retraction of the push rod. A limiting member is provided between the push rod and the cavity to prevent relative rotation between the two. The push rod moves axially along the length of the cavity through the limiting member.

[0011] The fit between the limiting member and the cavity has a non-circular structure in the cross-sectional direction.

[0012] A transmission structure is provided between the driver and the drive shaft. The driver is connected to the drive shaft through the transmission structure. When the driver is started, the drive shaft is rotated through the transmission structure.

[0013] One end of the top rod is equipped with a flexible anti-collision component for absorbing the corresponding impact force.

[0014] A household appliance designed for this purpose includes a body and a door that opens and closes on the body. The body is provided with an automatic ejection mechanism for the door. The body is provided with a lock seat, and the door is provided with a latch that cooperates with the lock seat. When the door is in a locked state, the latch is engaged with the lock seat. When the door is in an unlocked state, the latch is disengaged from the lock seat.

[0015] The actuator is activated when the door of the household appliance changes from the closed state to the open state, and the push rod extends axially after the actuator is activated and pushes the door of the household appliance to open.

[0016] The door of the household appliance is equipped with a door lock actuator for triggering the latch to disengage from the lock seat.

[0017] The household appliances mentioned are dishwashers, washing machines, refrigerators, disinfection cabinets, ovens, microwave ovens, microwave steam ovens, light wave ovens, or electric steam ovens.

[0018] The beneficial technical effects of this utility model are as follows:

[0019] Through the transmission between the driver and the push rod, the push rod is linearly pushed out the instant the appliance door lock is released, achieving a seamless connection between unlocking and pushing open the appliance door, eliminating the need for manual force. This improves the user experience. Combined with the door latch that moves up and down and the door lock driver that triggers the latch to disengage from the lock seat, the appliance unlocks automatically, eliminating the need for manual force to pull the door open. No manual intervention is required during the unlocking and opening process, thus improving appliance performance.

[0020] The automatic door ejection mechanism is suitable for scenarios involving lifting latches, enabling the door to automatically eject after unlocking. This mechanism can also be used with conventional lock seats, relying solely on the ejection mechanism to forcibly eject the door to a set distance after unlocking. This mechanism also functions as an unlocking mechanism. For example, if the latch of a household appliance door is located within a resilient lock seat, the resilient lock seat provides radial locking force to the latch. When the driver is activated and triggers the push rod to extend towards the door, the push rod pushes forward, causing the latch to disengage from the lock seat. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the closing structure of a household appliance door according to an embodiment of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of a household appliance door in an unlocked state, showing the door being opened by a push rod according to an embodiment of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of an automatic ejection mechanism according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram showing the assembly and disassembly structure of an automatic ejection mechanism according to an embodiment of the present invention.

[0025] Figure 5 This is a three-dimensional cross-sectional structural diagram of an automatic ejection mechanism according to an embodiment of the present invention.

[0026] Figure 6 This is a three-dimensional cross-sectional structural diagram of an automatic ejection mechanism according to an embodiment of the present invention.

[0027] Figure 7 This is a three-dimensional cross-sectional structural diagram of the push rod in the extended state in an automatic push-out mechanism according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the connection between the door lock driver and the latch transmission in one embodiment of the present invention. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] See Figures 1-7 An automatic ejection mechanism for a door includes a driver 2 and a push rod 1 that performs axial telescopic movement. The driver 2 is provided with a drive shaft 3 that is hygienically connected to the push rod 1.

[0031] The actuator 2 is activated when the door changes from the closed state to the open state, so as to trigger the top rod 1 to extend axially and push the household appliance door 4 to open.

[0032] Through the axial linkage design of the driver 2 and the push rod 1, the push rod 1 is synchronously triggered to push out linearly at the moment the door lock is released, so as to achieve precise timing matching between the unlocking signal and the door opening action. This ensures that the door of the household appliance can be automatically opened after the door is unlocked without manual intervention, which significantly improves the continuity and intelligence level of the door opening operation.

[0033] The push rod 1 is provided with a transmission component 5 that cooperates with the drive shaft 3. The transmission component 5 and the push rod 1 are integrally formed. A threaded transmission structure is provided between the transmission component 5 and the drive shaft 3. During the rotation of the drive shaft 3, the transmission component 5 moves axially along the drive shaft 3 and drives the push rod 1 to move axially.

[0034] Alternatively, the push rod 1 may be provided with a transmission component 5 that cooperates with the drive shaft 3. The transmission component 5 and the push rod 1 are separately arranged. The transmission component 5 is mounted on the push rod 1, and a threaded transmission structure is provided between the transmission component 5 and the drive shaft 3. During the rotation of the drive shaft 3, the transmission component 5 moves axially along the drive shaft 3 and drives the push rod 1 to move axially.

[0035] The threaded transmission structure converts the rotational motion of the drive shaft 3 into precise linear displacement of the transmission component 5 and the push rod 1. By utilizing the mechanical self-locking characteristics of the screw pair, it prevents the push rod 1 from unexpectedly retracting or deviating in the non-drive state, thus ensuring the stability and controllability of the ejection action.

[0036] When the appliance door 4 is pushed out, the driver 2 starts, the drive shaft 3 rotates, and the transmission component 5 drives the push rod 1 to reset. The push rod 1 retracts to prevent the push rod 1 from accidentally injuring the user while it remains extended after the appliance door 4 is pushed out.

[0037] The transmission component 5 is fixed on the top rod 1. The transmission component 5 and the top rod 1 are integrally formed, or the transmission component 5 is detachably installed and fixed on the top rod 1 (the transmission component 5 and the top rod 1 are separate).

[0038] The integral molding of the transmission component 5 and the push rod 1 can enhance the mechanical structural strength between the push rod 1 and the transmission component 5, and reduce the risk of loosening at the connection between the transmission component 5 and the push rod 1 due to long-term load.

[0039] The transmission component 5 is detachably mounted on the top rod 1, which facilitates independent maintenance or replacement of the transmission component 5 and reduces the maintenance cost of the overall mechanism.

[0040] The drive shaft 3 and / or push rod 1 are mounted on the fixed base 6, and the drive shaft 3 and push rod 1 are arranged on the fixed base 6 along the length direction of the fixed base 6.

[0041] The drive shaft 3 and the push rod 1 are arranged linearly along the fixed seat 6, which optimizes the spatial layout of the mechanism, forms a compact axial power transmission path, and reduces the lateral space occupied.

[0042] The fixed base 6 is provided with a cavity 7 for the axial extension and retraction of the top rod 1. A limiting member 8 is provided between the top rod 1 and the cavity 7 to prevent relative rotation between the two. The top rod 1 moves axially along the length of the cavity 7 through the limiting member 8.

[0043] The cooperation between cavity 7 and limiting member 8 constrains push rod 1 to move only along the axial direction, eliminating the risk of deflection of push rod 1 caused by torque transmission during transmission, ensuring the straightness of the movement trajectory of push rod 1, and extending the service life of threaded pair.

[0044] The fit between the limiting member 8 and the cavity 7 has a non-circular cross-sectional structure. This non-circular cross-sectional fit structure completely blocks the rotational freedom between the push rod 1 and the cavity 7 through physical limiting, avoiding mechanism jamming caused by the accumulation of small rotations, and improving the reliability of axial movement and repeatability of positioning accuracy.

[0045] A transmission structure 9 is provided between the driver 2 and the drive shaft 3. The driver 2 is connected to the drive shaft 3 through the transmission structure 9. When the driver 2 is started, the drive shaft 3 is rotated through the transmission structure 9.

[0046] In this embodiment, a cover 18 is provided above the driver 2 on the fixed base 6. The cover 18 is connected to the fixed base 6 by a snap fastener. The driver 2 is limited between the fixed base 6 and the cover 18 to prevent the driver 2 from detaching from the fixed base 6.

[0047] In this embodiment, the transmission structure 9 is a gear transmission structure, which can be understood as the output shaft of the driver 2 having a first gear and the drive shaft 3 having a second gear meshing with the first gear. When the output shaft of the driver 2 rotates, it drives the drive shaft 3 to rotate through the meshing of the two gears.

[0048] The transmission structure 9 enables power matching between the driver 2 and the drive shaft 3, matching different load requirements by reducing speed or increasing torque, while isolating the transmission of vibration from the driver 2 to the push rod 1, thus reducing operating noise.

[0049] One end of the top rod 1 is provided with a flexible anti-collision component 10 for absorbing the corresponding impact force. The flexible anti-collision component 10 absorbs the impact energy at the moment the end of the top rod 1 contacts the door body through elastic deformation, reducing the risk of scratches on the door surface caused by hard contact, and at the same time reducing the collision noise when the door is opened.

[0050] In this embodiment, the flexible anti-collision member 10 can be sleeved on the outer side of the end of the top rod 1. Alternatively, the top rod 1 has a cavity for ventilation, into which the flexible anti-collision member 10 is inserted, and one end of the flexible anti-collision member 10 is limited to the outer side of the end of the top rod 1.

[0051] In this embodiment, the drive shaft 3 is a screw and is inserted into the cavity of the push rod 1.

[0052] In this embodiment, the limiting member 8 is provided with an assembly groove for inserting the transmission member 5 and the push rod 1. The assembly groove is a stepped groove. The transmission member 5 is a nut that cooperates with the screw. A positioning ring is provided on the outer side of the transmission member 5 and positioned on the step of the assembly groove.

[0053] See Figure 8 A household appliance includes a body 11 and a door 4 that opens and closes on the body 11. The body 11 is provided with an automatic push-out mechanism for the door. The body 11 is provided with a lock seat, and the door 4 is provided with a latch 12 that cooperates with the lock seat. When the door 4 is in a locked state, the latch 12 is engaged with the lock seat. When the door 4 is in an unlocked state, the latch 12 is disengaged from the lock seat. The driver 2 is activated when the door 4 changes from a closed state to an open state. After the driver 2 is activated, the push rod 1 extends axially and pushes the door 4 to open.

[0054] The door body 4 of the household appliance is equipped with a door lock driver 13 for triggering the latch 12 to disengage from the lock seat. The door lock driver 13 is electrically linked with the ejector mechanism to realize real-time signal interaction between the door lock status and the ejector rod action, ensuring the response of the ejector mechanism after the unlocking action is completed.

[0055] Through the coordinated control of the push-out mechanism and the door lock system, the door is automatically pushed open immediately after the door lock is released, forming a fully automated "unlock-push-open" operation, which solves the interactive breakpoint problem of traditional household appliances that require secondary force to pull the door.

[0056] The automatic door ejection mechanism is suitable for scenarios involving lifting latches, enabling the door to automatically eject after unlocking. This mechanism can also be used with conventional lock seats, relying solely on the ejection mechanism to forcibly eject the door to a set distance after unlocking. This mechanism also functions as an unlocking mechanism. For example, if the latch of the appliance door 4 is located within a resilient lock seat, the resilient lock seat provides a radial locking force to the latch of the appliance door 4. When the driver 2 is activated and triggers the push rod 1 to extend towards the appliance door 4, the push rod 1 pushes forward towards the appliance door 3, causing the latch to disengage outward from the lock seat.

[0057] Alternatively, the automatic door ejection mechanism is applicable to cooking appliances, such as microwave ovens. The microwave oven door is fastened to the oven body by a hook, and an automatic door ejection mechanism is installed between the oven body and the door opening and closing point. When the microwave oven door needs to be opened, the push rod 1 of the automatic door ejection mechanism extends and pushes open the microwave oven door to realize the opening of the microwave oven door (equivalent to the unlocking function of the automatic door ejection mechanism).

[0058] In this embodiment, a slider 14 is provided between the door lock driver 13 and the latch 12. A compression spring 15 is provided at the bottom of the latch 12. The slider 14 is provided with an inclined surface 16 acting on the latch 12. The output shaft of the door lock driver 13 is connected to the slider 14. The door lock driver 13, the slider 14 and the latch 12 are all installed inside the door lock housing 17. The door lock driver 13, the slider 14 and the latch 12 are arranged and installed inside the door lock housing 17 along the length direction of the door lock housing 17, resulting in a compact structure.

[0059] When the appliance door 4 is closed, and the output shaft of the door lock driver 13 is in the retracted state, the latch 12 remains in the locked position under the elastic action of the compression spring 15. The latch 12 is locked to the lock seat, thus locking the appliance door 4. When the appliance door 4 needs to be opened, the output shaft of the door lock driver 13 extends, the slider 14 slides, and the inclined plane 16 acts on the latch 12, causing the latch 12 to descend and compress the compression spring 15. The latch 12 disengages from the lock seat, the appliance door 4 is unlocked, and the push rod 1 extends axially after the driver 2 is activated, pushing the appliance door 4 to open.

[0060] Since the top rod 1 can be retracted by the driver 2 after the appliance door 4 is opened, when the appliance door 4 is opened to closed, the output shaft of the door lock driver 13 is reset to the retracted state, the slider 14 is reset, and the latch 12 is elastically reset by the compression spring 15, so that the appliance door 4 is locked again, preventing the appliance door 4 from being opened at will.

[0061] In this embodiment, the driver 2 is a motor.

[0062] The household appliances mentioned are dishwashers, washing machines, refrigerators, disinfection cabinets, ovens, microwave ovens, microwave steam ovens, light wave ovens, or electric steam ovens.

[0063] In this embodiment, the household appliance is a dishwasher.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic ejection mechanism for a door, characterized in that: Includes a driver (2) and a push rod (1) for pushing out the door body, the driver (2) having a drive shaft (3) that is drively connected to the push rod (1); The actuator (2) is activated when the door changes from the closed state to the open state, so as to trigger the top rod (1) to extend axially and push the door open.

2. The automatic ejection mechanism for a door as described in claim 1, characterized in that: The push rod (1) is provided with a transmission component (5) that cooperates with the drive shaft (3). A threaded transmission structure is provided between the transmission component (5) and the drive shaft (3). During the rotation of the drive shaft (3), the transmission component (5) moves axially along the drive shaft (3) and drives the push rod (1) to move axially.

3. The automatic ejection mechanism for a door according to claim 2, characterized in that: The transmission component (5) and the top rod (1) are set separately, or the transmission component (5) and the top rod (1) are set as a whole.

4. The automatic ejection mechanism for a door as described in claim 1, characterized in that: The drive shaft (3) and / or push rod (1) are mounted on the fixed seat (6), and the drive shaft (3) and push rod (1) are arranged on the fixed seat (6) along the length direction of the fixed seat (6).

5. The automatic ejection mechanism for a door according to claim 4, characterized in that: The fixed base (6) is provided with a cavity (7) for the axial extension and retraction of the top rod (1). A limiting member (8) is provided between the top rod (1) and the cavity (7) to prevent them from rotating relative to each other. The top rod (1) moves axially along the length of the cavity (7) through the limiting member (8).

6. The automatic ejection mechanism for a door according to claim 5, characterized in that: The fit between the limiting member (8) and the cavity (7) is non-circular in the cross-sectional direction.

7. The automatic ejection mechanism for a door according to claim 1, characterized in that: A transmission structure (9) is provided between the driver (2) and the drive shaft (3). The driver (2) is connected to the drive shaft (3) through the transmission structure (9). When the driver (2) starts, the drive shaft (3) rotates through the transmission structure (9).

8. The automatic ejection mechanism for a door according to claim 1, characterized in that: One end of the top rod (1) is provided with a flexible anti-collision component (10) for absorbing the corresponding impact force.

9. A household appliance, comprising a body (11) and a door (4) that opens and closes on the body (11), characterized in that: The body (11) is provided with an automatic push-out mechanism for the door as described in any one of claims 1-8; the driver (2) is activated when the household appliance door (4) changes from the closed state to the open state, and the push rod (1) extends axially after the driver (2) is activated and pushes the household appliance door (4) open.

10. The household appliance according to claim 9, characterized in that: The household appliances mentioned are dishwashers, washing machines, refrigerators, disinfection cabinets, ovens, microwave ovens, microwave steam ovens, light wave ovens, or electric steam ovens.

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