Door opening mechanism and electrical equipment

Abstract

The utility model discloses a door opening mechanism and electrical equipment, the door opening mechanism is installed on an equipment body, the door opening mechanism comprises a driving device, and the output end of the driving device is provided with a first transmission wheel rotationally installed on the equipment body; the power part is rotationally mounted on the equipment body, the power part comprises a power wheel and a second transmission wheel which are coaxially connected, and the second transmission wheel is meshed with the first transmission wheel; the door opening piece is in dynamic coupling connection with the power wheel and is driven by the power wheel to reciprocate between a recovery position and an ejection position; wherein the first transmission wheel and the second transmission wheel are both eccentrically arranged, and the first transmission wheel and the power piece are respectively provided with a counterweight piece, so that the mass center of an assembly formed by the first transmission wheel, the power piece and the corresponding counterweight piece is located on the rotating axis of the assembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electrical appliances, and particularly relates to a door opening mechanism and an electrical appliance. BACKGROUND

[0002] An electrical appliance such as a refrigerator has a certain self-locking force after the door body is closed, and it is difficult to open the door. It is inconvenient to operate when a user holds an article, or an old person, a child, a patient or other special groups use it. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a door opening mechanism and an electrical appliance, which can automatically open the door and stably operate with low noise.

[0004] In a first aspect, the present application provides a door opening mechanism, comprising:

[0005] a driving device, an output end of the driving device being provided with a first transmission wheel rotatably installed on a device body;

[0006] a power member rotatably installed on the device body, the power member comprising a power wheel and a second transmission wheel coaxially connected, the second transmission wheel being engaged with the first transmission wheel;

[0007] a door opening member, which is power-coupled with the power wheel and reciprocally moves between a recovery position and an ejection position under the drive of the power wheel;

[0008] wherein the first transmission wheel and the second transmission wheel are both eccentrically arranged, and the first transmission wheel and the power member are respectively provided with counterweights, so that the center of mass of the assembly formed by the first transmission wheel and the power member and the corresponding counterweight is located on the rotation axis thereof.

[0009] According to the door opening mechanism of the present application, the torque output by the driving device is transmitted to the second transmission wheel through the first transmission wheel, and then drives the power wheel to rotate, and then drives the door opening member to reciprocally move through the power wheel to drive the door body to automatically open. The first transmission wheel and the second transmission wheel are both eccentrically arranged to achieve speed change during the engagement and rotation of the two, so as to change the movement speed of the door opening member and improve the convenience of use. By arranging the counterweights on the eccentrically arranged first transmission wheel and power member, the running stability of the first transmission wheel and the power member is improved, the noise is reduced, and the use experience is improved.

[0010] According to an embodiment of the present application, the power wheel and the second transmission wheel are integrally formed.

[0011] The counterweights of the power member and / or the first transmission wheel are embeddedly installed inside or installed on the surface.

[0012] According to one embodiment of the present application, the first transmission wheel and / or the power member is made of a material different from that of the corresponding counterweight member.

[0013] According to one embodiment of the present application, at least one of the first transmission wheel and the second transmission wheel is a half gear.

[0014] According to one embodiment of the present application, along the rotation plane of the power member, the line connecting the mass center of the first transmission wheel or the power member and the mass center of the corresponding counterweight member passes through the corresponding rotation axis, and satisfies:

[0015] M1*L1=M2*L2;

[0016] wherein M1 is the mass of the first transmission wheel or the power member, L1 is the vertical distance from the mass center of the first transmission wheel or the power member to the rotation axis, M2 is the weight of the corresponding counterweight member of the first transmission wheel or the power member, and L2 is the vertical distance from the mass center of the corresponding counterweight member to the corresponding rotation axis.

[0017] According to one embodiment of the present application, during the movement of the door opening member from the recovery position to the ejection position, the speed ratio of the first transmission wheel to the second transmission wheel presents a decreasing trend.

[0018] According to one embodiment of the present application, the door opening mechanism further comprises a trigger member and a trigger switch, the trigger member is movably arranged under the drive of the power wheel, and triggers the trigger switch when the door opening member is located at the recovery position or the ejection position; during the movement of the door opening member driven by the power member between the recovery position and the ejection position, the trigger member releases the trigger switch.

[0019] According to one embodiment of the present application, the power wheel comprises a gear portion, a cam portion and two groove portions, and along the circumferential direction of the power wheel, the two groove portions are respectively arranged between the two ends of the gear portion and the cam portion.

[0020] When the door opening member is located at the recovery position or the ejection position, the trigger member is in engagement with one of the two groove portions; during the movement of the door opening member driven by the power member between the recovery position and the ejection position, the trigger member is in abutment with the cam portion.

[0021] The door opening member is provided with a rack portion engaged with the gear portion.

[0022] According to one embodiment of the present application, a foolproof structure is arranged between the first transmission wheel and the second transmission wheel, and between the gear portion and the rack portion.

[0023] In a second aspect, the present application provides an electric appliance. The electric appliance comprises:

[0024] The device body comprises a box body and a door body, and the door body is arranged on the box body.

[0025] The door opening mechanism of any of the technical solutions in the first aspect is installed on the box or door, and the door opening component drives the door to open relative to the box during the process of moving from the recycling position to the top position.

[0026] The beneficial effects of the electrical equipment provided in the second aspect of this application are the same as those of the door opening mechanism provided in the first aspect, and will not be repeated here.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0030] Figure 2 This is a partial structural schematic diagram of the door opening mechanism provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the first transmission wheel, power component, and counterweight provided in the embodiments of this application;

[0032] Figure 4 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0033] Figure 5 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0034] Figure 6 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0035] Figure 7 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0036] Figure 8 This is a partial structural schematic diagram of the electrical equipment provided in the embodiments of this application.

[0037] Figure label:

[0038] 100. Equipment body; 110. Cabinet; 120. Door;

[0039] 200. Door opening mechanism; 210. Power component; 211. Power wheel; 2111. First working surface; 2112. Second working surface; 2113. Gear section; 2114. First anti-foolproof part; 2115. Cam section; 2116. Groove section; 212. Second transmission wheel; 220. Door opening component; 221. Rack section; 222. Second anti-foolproof part; 230. Trigger switch; 240. Trigger element; 2411. First contact part; 2412. Second contact part; 250. Elastic element; 260. Control panel; 270. Drive device; 271. Motor; 272. Gear set; 273. First transmission wheel; 280. Housing; 290. Counterweight. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] The following is for reference. Figures 1-8 This application describes a door opening mechanism and electrical device according to embodiments thereof.

[0042] Please see Figures 1-3 This application provides a door opening mechanism 200, which is installed on the device body 100 and is used to realize the function of automatically opening the door body 120.

[0043] The door opening mechanism 200 includes a drive unit 270, a power component 210, a door opening component 220, and a counterweight component 290.

[0044] The output end of the drive device 270 is provided with a first transmission wheel 273 that is rotatably mounted on the device body 100.

[0045] The drive unit 270 serves as the power source for the door opening mechanism 200, outputting the power to drive the door 120 to open. The drive unit 270 may include a motor 271 and a gear set 272. The output end of the motor 271 can be coupled to the first transmission wheel 273 through the gear set 272. The gear set 272 can increase the torque output by the motor 271 and reduce the speed to ensure sufficient driving force to drive the door 120 to open relative to the housing 110, and allow the torque output by the motor 271 to be output to the power component 210 through the first transmission wheel 273.

[0046] The power component 210 is rotatably mounted on the equipment body 100. The power component 210 includes a power wheel 211 and a second transmission wheel 212 coaxially connected. The second transmission wheel 212 meshes with the first transmission wheel 273.

[0047] The first transmission wheel 273 meshes with the second transmission wheel 212, causing the second transmission wheel 212 to rotate under the drive of the first transmission wheel 273. The second transmission wheel 212 is coaxially connected with the power wheel 211, so that when the second transmission wheel 212 rotates, it drives the power wheel 211 to rotate synchronously.

[0048] The door opening component 220 is poweredly coupled to the drive wheel 211 and reciprocates between the retraction position and the ejection position under the drive of the drive wheel 211.

[0049] The drive wheel 211 is coupled to the door opening component 220. The forward and reverse rotation of the drive wheel 211 drives the door opening component 220 to reciprocate between the retracted and extended positions. When in the retracted position, the door opening component 220 retracts into the equipment body 100 without interfering with the closing of the door 120, allowing the door 120 to be closed. As the door opening component 220 moves from the retracted position to the extended position under the drive of the drive wheel 210, it drives the door 120 to open. When the door opening component 220 reaches the extended position, it moves to its furthest possible extension, achieving the maximum opening angle of the door 120.

[0050] The first transmission wheel 273 and the second transmission wheel 212 are both eccentrically arranged. The first transmission wheel 273 and the power component 210 are respectively provided with counterweights 290 so that the center of mass of the component formed by the first transmission wheel 273, the power component 210 and the corresponding counterweights 290 is located on its rotation axis.

[0051] By appropriately setting the eccentricity and initial phase angle of the two eccentric gears, while the rotational speed of the first transmission wheel 273 remains constant, the rotational speed of the second transmission wheel 212 will vary according to the design, causing a change in the rotational speed of the power wheel 211, thereby altering the movement speed of the door opening component 220 coupled to the power wheel 211. During the process of the door opening component 220 moving from the retracted position to the ejected position, the rotational speed of the second transmission wheel 212 can exhibit an increasing trend, or it can increase first and then decrease, or it can increase first and then remain constant, etc., depending on the actual design requirements.

[0052] Taking the process of the door opening component 220 moving from the retracted position to the ejected position, where the rotational speed of the second drive wheel 212 can increase, as an example, by adjusting their initial relative positions (phase angles), the second drive wheel 212 is in a relatively slow initial rotational state during the initial engagement phase, i.e., when the door opening component 220 is in the retracted position. As the gears rotate, due to the eccentric effect, the engagement point position changes continuously, and through a reasonable eccentricity setting, the rotational radius of the second drive wheel 212 (equivalent to the effective pitch circle radius) increases as the door opening component 220 moves from the retracted position to the ejected position, thereby increasing the rotational speed of the second drive wheel 212. This results in an increasing trend in the movement speed of the door opening component 220 during the process of moving from the retracted position to the ejected position, providing sufficient torque at the initial opening stage to open the door 120, releasing the self-locking force, and accelerating in the latter part of the movement stroke to directly push the door 120 open, thus achieving automatic large-angle opening of the door 120.

[0053] Because both the first transmission wheel 273 and the second transmission wheel 212 are eccentrically positioned, and their centers of mass are not on their respective axes of rotation, the stability of the first transmission wheel 273 and the entire power component 210 during rotation is affected, easily generating noise. By setting counterweights 290 on the first transmission wheel 273 and the power component 210 respectively, the center of mass of the assembly formed by the first transmission wheel 273 and the counterweight 290 is located on the axis of rotation of the first transmission wheel 273, and the center of mass of the assembly formed by the second transmission wheel 212 and the counterweight 290 is located on the axis of rotation of the power component 210. This adjusts the rotational stability of the first transmission wheel 273 and the second transmission wheel 212, reduces noise during operation, and improves the user experience.

[0054] According to the door opening mechanism 200 of this application, the torque output by the drive device 270 is transmitted to the second drive wheel 212 through the first drive wheel 273, which in turn drives the power wheel 211 to rotate. The power wheel 211 then drives the door opening component 220 to reciprocate, thereby automatically opening the door body 120. Both the first drive wheel 273 and the second drive wheel 212 are eccentrically positioned to achieve speed change during their meshing rotation, thereby altering the movement speed of the door opening component 220 and improving ease of use. By providing counterweights 290 on the eccentrically positioned first drive wheel 273 and power component 210, the operational stability of the first drive wheel 273 and power component 210 is improved, noise is reduced, and the user experience is enhanced.

[0055] Please see Figure 1 and Figure 2In some embodiments, the door opening mechanism 200 may include a housing 280, which is fixedly installed on the equipment body 100. The drive device 270, the power component 210, and the door opening component 220 can all be installed inside the housing 280. The housing 280 serves to protect the door opening mechanism 200 and improve the integration. When the door opening mechanism 200 is assembled onto the equipment body 100 as an integrated component, the assembly efficiency can be greatly improved.

[0056] When the door opening component 220 is in the retracted position, the door opening component 220 can be completely retracted into the housing 280, or at least partially left outside the housing 280, gradually extending outside the housing 280 during the movement from the retracted position to the ejected position.

[0057] The housing 280 may be provided with a guide groove that guides the movement of the door opening component 220 and a limiting groove that limits the movement of the power component 210, so as to improve the stability of the operation of the door opening component 220 and the power component 210.

[0058] According to some embodiments of this application, the power wheel 211 and the second transmission wheel 212 are integrally formed; the counterweight 290 of the power component 210 and / or the first transmission wheel 273 is embedded in the interior or mounted on the surface.

[0059] The power wheel 211 and the second transmission wheel 212 are integrally formed to improve the assembly efficiency and working stability of the power component 210. Furthermore, the center of gravity of the entire power component 210 is relatively fixed, which allows for better adjustment of the rotational smoothness of the power component 210.

[0060] In one example, please refer to Figure 2 and Figure 3 The counterweight 290 can be embedded in the power component 210 or the first transmission wheel 273 to optimize the spatial layout and reduce the impact on other components; and the embedded installation can make the position of the counterweight more accurate, further improving the stability of operation.

[0061] In another example, the counterweight 290 can be mounted on the surface of the power component 210 or the first transmission wheel 273, and can be installed by adhesive or bolt connection, which is simple to assemble and easy to adjust.

[0062] According to some embodiments of this application, the first transmission wheel 273 and / or the power component 210 are made of different materials than their corresponding counterweight 290.

[0063] The first transmission component and the power component 210 can be injection molded from plastic. By setting the first transmission wheel 273 or the power component 210 to be made of a different material from the counterweight 290 on it, the counterweight 290 can be made of other materials with higher density, such as metal, thereby making the counterweight 290 smaller in size, reducing the space occupied, and making it easier to adjust the stability of the first transmission component and the power component 210.

[0064] When the counterweight 290 is embedded in the first transmission component or power component 210, the counterweight 290 can be directly injection molded into the corresponding part, which greatly improves production efficiency and ensures the stability of the overall connection.

[0065] Please refer to Figure 2 and Figure 3 According to some embodiments of this application, at least one of the first transmission wheel 273 and the second transmission wheel 212 is a half gear.

[0066] At least one of the first transmission wheel 273 and the second transmission wheel 212 is a half gear, that is, an incomplete gear. Specifically, both the first transmission wheel 273 and the second transmission wheel 212 can be half gears, or one of the first transmission wheel 273 and the second transmission wheel 212 is a half gear.

[0067] Taking the first transmission wheel 273 and the second transmission wheel 212 as examples, since the opening stroke of the door component 220 is limited, the rotation angle of the power component 210 is also limited. During the process of the power component 210 driving the door component 220 to reciprocate from the retracted position to the ejected position, the rotation angle of the power component 210 is less than 360°. That is, there is only partial meshing between the first transmission wheel 273 and the second transmission wheel 212. By setting the first transmission wheel 273 and the second transmission wheel 212 as incomplete gears and retaining the teeth that effectively mesh, the material of the parts can be reduced, the production cost can be reduced, and the product's lightweight level can be improved.

[0068] When the door opening component 220 is in the retraction position, the engagement start end of the first transmission wheel 273 is provided with a foolproof protrusion, and the engagement start end of the second transmission wheel 212 is correspondingly engaged with the foolproof protrusion to improve assembly accuracy and assembly efficiency and ensure operational stability.

[0069] Please see Figure 3 According to some embodiments of this application, along the rotation plane of the power member 210, the line connecting the center of mass of the first transmission wheel 273 or the power member 210 and the center of mass of the corresponding counterweight 290 passes through the corresponding rotation axis, and satisfies:

[0070] M1*L1=M2*L2; where M1 is the mass of the first transmission wheel 273 or the power component 210, and L1 is the vertical distance from its center of mass to the axis of rotation; M2 is the weight of the counterweight 290 corresponding to the first transmission wheel 273 or the power component 210, and L2 is the vertical distance from its center of mass to the corresponding axis of rotation.

[0071] It is understood that the center of mass of the first transmission wheel 273 or the power component 210 and the center of mass of the corresponding counterweight 290 are located on both sides of their respective rotation axes, so that the center of mass of the assembly formed by the first transmission wheel 273 or the power component 210 and the corresponding counterweight 290 coincides with their respective rotation axes. Taking the power component 210 and its counterweight 290 as an example, the line connecting the center of mass of the power component 210 and the center of mass of its counterweight 290 intersects the rotation axis of the power component 210. That is, the center of mass of the power component 210, the center of mass of its counterweight 290, and the rotation axis of the power component 210 are all collinearly arranged on the rotation plane of the power component 210.

[0072] Let the mass of the power component 210 be M1, and the perpendicular distance from the center of mass of the power component 210 to its rotation axis be L1; let the mass of the counterweight 290 on the power component 210 be M2, and the perpendicular distance from the center of mass of the counterweight 290 to its rotation axis be L2. Then, M1*L1 = M2*L2. This is because the centers of mass of the power component 210 and the counterweight 290 are distributed on opposite sides of the rotation axis, ensuring that the center of mass of the assembly formed by the power component 210 and the counterweight 290 is located on the rotation axis of the power component 210, thereby improving the rotational stability of the power component 210. The first transmission wheel 273 follows the same principle and will not be elaborated further here.

[0073] Please see Figure 2 and Figure 3 According to some embodiments of this application, during the process of the door opening member 220 moving from the retracted position to the ejected position, the speed ratio between the first drive wheel 273 and the second drive wheel 212 tends to decrease.

[0074] In related technologies, the door 120 of electrical appliances (such as refrigerators) has a self-locking closing structure or a magnetic door seal, requiring a large opening force. Once opened, the required pushing force decreases, and some doors will automatically spring open. The speed at which a typical push rod pushes out is constant. After the door springs open, the push rod cannot continue to push the door to do work, and the door can only open to a small angle, making it impossible to open the door at a large angle.

[0075] In this design, during the movement of the door opening component 220 from the retracted position to the ejected position, the speed ratio between the first transmission wheel 273 and the second transmission wheel 212 tends to decrease. That is, as the door opening component 220 ejects, while the rotational speed of the first transmission wheel 273 remains constant, the rotational speed of the second transmission wheel 212 tends to increase, which in turn increases the rotational speed of the power wheel 211, thus increasing the ejection speed of the door opening component 220. This results in acceleration during the ejection process, achieving acceleration after the door 120 opens a certain gap, and reaching maximum pushing speed when moving to the ejected position, allowing the door 120 to automatically open at a large angle under the action of acceleration.

[0076] In one example, the first transmission wheel 273 and the second transmission wheel 212 are eccentrically arranged, and can also be non-circular gears.

[0077] The pitch curve shape of a non-circular gear determines the variation law of its transmission ratio. When both the first transmission wheel 273 and the second transmission wheel 212 are non-circular gears, the speed of the second transmission wheel 212 can be gradually increased by rationally designing their pitch curve shapes. For example, when both the first transmission wheel 273 and the second transmission wheel 212 are elliptical gears, this can be achieved by rationally designing the ratio of the major axis to the minor axis of the ellipse. In the initial meshing stage, that is, when the door opening member 220 is in the retracted position, meshing begins near the position where its major axis is close to the minor axis of the second transmission wheel 212. As the door opening member 220 moves from the retracted position to the ejected position, because the radius of curvature of the elliptical gear is larger at the major axis and smaller at the minor axis, under the condition of pure rolling of the pitch curve, according to the gear transmission ratio formula (the transmission ratio is equal to the ratio of the radius of curvature of a certain point of the driving gear pitch curve to the radius of curvature of the corresponding meshing point of the driven gear pitch curve), the speed of the second transmission wheel 212 will increase during the process of the door opening member 220 moving from the retracted position to the ejected position.

[0078] In addition to elliptical gears, the first transmission wheel 273 and the second transmission wheel 212 can also be designed with other non-circular gears with special pitch curves. For example, a non-circular gear with a pitch curve similar to a logarithmic spiral can be designed, but details will not be elaborated here.

[0079] Please see Figure 2 According to some embodiments of this application, the door opening mechanism 200 may further include a trigger 240 and a trigger switch 230. The trigger 240 may be movably set under the drive of the power wheel 211 and triggers the trigger switch 230 when the door opening member 220 is in the retracted position or the ejected position. During the process of the door opening member 220 moving between the retracted position and the ejected position driven by the power member 210, the trigger 240 releases the trigger switch 230.

[0080] The trigger switch 230 can be a mechanical trigger switch 230 or a magnetic induction trigger switch 230, etc., and the specific form is not limited. In one example, the trigger switch 230 is a mechanical trigger switch 230, which is triggered by direct contact or pressing of the trigger element 240, and the trigger is deactivated by releasing the contact or pressing. The trigger switch 230 can send an induction signal when triggered.

[0081] In one example, the power wheel 211 of the power member 210 may have a first working surface 2111 and a second working surface 2112 distributed circumferentially. The first working surface 2111 and the second working surface 2112 can act on the trigger member 240, and the first working surface 2111 and the second working surface 2112 are distributed circumferentially along the rotation plane of the power member 210. The power member 210 rotates about an axis extending in a first direction, and the trigger member 240 slides in a second direction driven by the power member 210. The second direction is angled to the first direction, meaning that the direction of movement of the trigger member 240 has a radial component in the power member 210. Therefore, during the rotation of the power member 210, either the first working surface 2111 or the second working surface 2112 can act on the trigger member 240.

[0082] By setting different curvatures or radii for different action surfaces, the trigger 240 can be driven to slide during contact with different action surfaces, or during the switching between the first action surface 2111 and the second action surface 2112. Furthermore, while the power component 210 drives the door opening component 220, it can also drive the trigger 240 to slide between the trigger position that triggers the trigger switch 230 and the release position that de-triggers the trigger switch 230.

[0083] Specifically, when the door opening member 220 is in the retracted position or the ejected position, the trigger member 240 contacts the first working surface 2111 and triggers the trigger switch 230; when the door opening member 220 is driven by the power member 210 and moves between the retracted position and the ejected position, the trigger member 240 contacts the second working surface 2112 and causes the trigger switch 230 to de-trigger.

[0084] When the door opener 220 is in the retracted or ejected position, that is, when the door opener 220 is at the two ends of its travel stroke, the trigger 240 contacts the first working surface 2111 and slides to the trigger position, triggering the trigger switch 230 and sending a sensing signal. During the movement of the door opener 220 between the retracted and ejected positions driven by the power member 210, that is, when the door opener 220 is between the two ends of its travel stroke, the trigger 240 contacts the second working surface 2112 and slides to the release position, de-triggering the trigger switch 230 and stopping the sending of the sensing signal.

[0085] Please seeFigures 3-7 ,in, Figures 4-7 The process of the door opening component 220 moving from the retracted position to the ejected position is demonstrated. In actual operation, the user sends an opening signal via a physical button on the device body 100, the control panel, or a mobile device. Upon receiving the opening signal, the door opening mechanism 200 controls the power component 210 to rotate. The rotation of the power component 210 drives the door opening component 220 to move from the retracted position to the ejected position, thereby opening the door body 120. Simultaneously, the second action surface 2112 of the power component 210 contacts the trigger component 240 and drives the trigger component 240 to slide to the release position, and the trigger switch 230 is in the de-triggered state. When the door opening component 220 is in the extended position, the door 120 is opened to its maximum angle possible by the ejection mechanism. At this time, the first action surface 2111 of the power component 210 contacts the trigger component 240 and drives the trigger component 240 to slide to the trigger position. The trigger component 240 triggers the trigger switch 230 and sends the first sensing signal. After receiving the first sensing signal, the door opening mechanism 200 controls the power component 210 to stop rotating, thereby stopping the door opening component 220 from ejecting. The door opening mechanism 200 can control the power component 210 to reverse after waiting for a preset time (e.g., 0.1s). It should be noted that the duration of this preset time is not limited. Figures 7-4 Under the reverse action of the power component 210, the door opening component 220 is driven to move from the ejected position to the retracted position. At the same time, the second working surface 2112 of the power component 210 contacts the trigger component 240 and drives the trigger component 240 to slide to the release position, and the trigger switch 230 is in the de-triggered state. When the door opening component 220 moves to the retracted position, the door opening component 220 is retracted into the equipment body 100, which does not affect the normal closing of the door body 120, and avoids the door opening component 220 interfering with or touching the user when it is in the ejected position, thus avoiding safety hazards. At this time, the first working surface 2111 of the power component 210 contacts the trigger component 240 and drives the trigger component 240 to slide to the trigger position. The trigger component 240 triggers the trigger switch 230 and sends a second sensing signal. After receiving the second sensing signal, the door opening mechanism 200 controls the power component 210 to stop rotating, so that the door opening component 220 stops its retraction action and completes one door opening action of the door opening mechanism 200.

[0086] During the entire door opening process, the door opening mechanism 200 receives an opening signal and controls the power component 210 to rotate; upon receiving the first sensing signal from the trigger switch 230, it controls the power component 210 to stop, and the door 120 opens; after waiting for a preset time, it controls the power component 210 to reverse; upon receiving the second sensing signal from the trigger switch 230, it controls the power component 210 to stop, and the door opening component 220 retracts, completing one door opening action. By utilizing the coordination of the rotation of the power component 210 and the sliding of the trigger component 240, the trigger switch 230 can be triggered twice by the sliding of the trigger component 240 within a small range, and the position of the door opening component 220 is determined by the two sensing signals. This method occupies little space, has a clear control logic, optimizes the overall spatial layout, and reduces production costs.

[0087] In some embodiments, the trigger 240 may include a first contact portion 2411 acting on the power member 210 and a second contact portion 2412 acting on the trigger switch 230.

[0088] The first contact portion 2411 is used to abut against the first working surface 2111 or the second working surface 2112 to drive the trigger member 240 to slide under the rotation of the power member 210. The second contact portion 2412 acts on the trigger switch 230, that is, when the second contact portion 2412 contacts the trigger switch 230, the trigger switch 230 is triggered, and when the second contact portion 2412 separates from the trigger switch 230, the trigger switch 230 is detrimental.

[0089] Please see Figures 2-7 According to some embodiments of this application, the power wheel 211 may include a gear portion 2113, a cam portion 2115, and two recessed portions 2116. Along the circumference of the power wheel 211, the two recessed portions 2116 are respectively disposed between the two ends of the gear portion 2113 and the cam portion 2115. When the door opening member 220 is in the retracted position or the ejected position, the trigger member 240 is engaged with one of the two recessed portions 2116. During the process of the door opening member 220 moving between the retracted position and the ejected position driven by the power member 210, the trigger member 240 abuts against the cam portion 2115. The door opening member 220 may be provided with a rack portion 221 that meshes with the gear portion 2113.

[0090] A gear portion 2113, a cam portion 2115, and two recessed portions 2116 are distributed circumferentially along the drive wheel 211. The gear portion 2113 meshes with the rack portion 221 of the door opening member 220 so that when the drive wheel 211 rotates, the rack portion 221 is driven to move through the gear portion 2113, thereby driving the door opening member 220 to move.

[0091] The concave surface of the groove 2116 forms the first working surface 2111, and the convex surface of the cam 2115 forms the second working surface 2112. When the power wheel 211 rotates to the position where either the groove 2116 is directly opposite the trigger 240, the door opening member 220 is in the retracted or ejected position, the trigger 240 abuts against the bottom of the corresponding groove 2116, and at this time, the trigger 240 triggers the trigger switch 230. During the process of the door opening member 220 moving between the retracted and ejected positions driven by the power member 210, the rotation of the power wheel 211 causes the first contact part 2411 to disengage from the groove 2116 and move under the drive of the cam 2115, and the movement of the second contact part 2412 causes the trigger switch 230 to deactivate.

[0092] By integrating the gear part 2113, the cam part 2115 and the groove part 2116 onto a single power wheel 211, the overall structure of the power component 210 is simplified, the spatial layout is optimized, and production costs are reduced.

[0093] Please see Figures 2-7 According to some embodiments of this application, a foolproof structure is provided between the first transmission wheel 273 and the second transmission wheel 212, and between the gear portion 2113 and the rack portion 221.

[0094] It is understandable that the rotation angle of the power component 210, the moving position of the door opening component 220, and the rotation position of the trigger component 240 correspond to each other. During assembly, it is necessary to ensure that the gear portion 2113 of the power component 210 meshes accurately with the rack portion 221 of the door opening component 220 to ensure the accurate and stable operation of the door opening mechanism 200. By setting foolproof structures between the first transmission wheel 273 and the second transmission wheel 212, and between the gear portion 2113 and the rack portion 221, the accuracy and stability of assembly are improved, and production efficiency is increased.

[0095] Specifically, in one example, both the first drive wheel 273 and the second drive wheel 212 are incomplete gears. When the door opening component 220 is in the retracted position, the meshing start end of the first drive wheel 273 is provided with a foolproof protrusion, and the meshing start end of the second drive wheel 212 is correspondingly engaged with the foolproof protrusion to improve assembly accuracy and assembly efficiency and ensure operational stability.

[0096] In another example, the gear portion 2113 and the rack portion 221 are respectively provided with a first anti-mistake portion 2114 and a second anti-mistake portion 222 that cooperate with each other. The first anti-mistake portion 2114 can be an anti-mistake protrusion, which connects between two adjacent teeth of the gear portion 2113 and is directly opposite to the rack portion 221. The rack portion 221 can be provided with an anti-mistake groove, and the teeth of the rack portion 221 that mesh with the above two teeth are provided with anti-mistake grooves corresponding to the anti-mistake protrusions. During assembly, the anti-mistake protrusions and anti-mistake grooves need to be aligned and connected, and without affecting the meshing, it is not easy to assemble incorrectly.

[0097] Please see Figure 2 , Figures 4-7 According to some embodiments of this application, the door opening mechanism 200 may also include an elastic element 250. The elastic element 250 is connected between the device body 100 and the trigger 240, and the elastic element 250 is used to apply a force to the trigger 240 to drive the trigger 240 into contact with the power element 210.

[0098] By setting the elastic element 250 to keep the trigger 240 in contact with the power element 210, it is ensured that the first working surface 2111 and the second working surface 2112 of the power element 210 can effectively act on the trigger 240, thereby driving the trigger 240 to slide. When the door opening member 220 is in the retracted position or the ejected position, the first contact portion 2411 of the trigger 240 abuts against the first working surface 2111 of the groove portion 2116 under the action of the elastic element 250, and the second contact portion 2412 triggers the trigger switch 230. During the process of the door opening member 220 moving from the retracted position to the ejected position, or from the ejected position to the retracted position, the cam portion 2115 drives the trigger 240 to rotate against the elastic force of the elastic element 250, the second contact portion 2412 separates from the trigger switch 230 and releases the trigger, and the first contact portion 2411 and the second working surface 2112 remain in contact under the action of the elastic element 250.

[0099] The elastic element 250 can be a spring or an elastic rubber ring, etc., and there is no specific limitation.

[0100] In one example, the elastic element 250 can be connected to the end of the trigger element 240 away from the power element 210, and apply an elastic force close to the power element 210 to give the trigger element 240 a tendency to remain in contact with the power element 210. Specifically, the end of the trigger element 240 away from the power element 210 can be provided with a mounting groove, one end of the elastic element 250 extends into the mounting groove, and the other end abuts against the bottom of the guide groove structure to ensure the stability of the connection of the elastic element 250.

[0101] Please see Figure 2 and Figure 4 According to some embodiments of this application, the door opening mechanism 200 further includes a control board 260 and a motor 271. The motor 271 is poweredly coupled to the power component 210 and is used to drive the power component 210 to rotate. The trigger switch 230 is integrated on the control board 260; or, the trigger switch 230 and the motor 271 are both integrated on the control board 260.

[0102] The control board 260 is electrically connected to the motor 271 to control the rotation or stop of the motor 271, and can also achieve forward or reverse rotation. The torque of the motor 271 can be transmitted to the power component 210 through the gear set 272 to drive the power component 210 to rotate.

[0103] In one example, the trigger switch 230 is integrated on the control board 260, that is, the trigger switch 230 is directly mounted on the control board 260, and there is no wire connection between the trigger switch 230 and the control board 260.

[0104] Because the power component 210 and the trigger component 240 work together, a single trigger switch 230 can detect the two operating positions of the door opening component 220. This eliminates the need for the trigger switch 230 to be designed based on the operating position of the door opening component 220, allowing it to be directly integrated onto the control board 260. This further simplifies assembly, optimizes the overall spatial layout, and reduces production costs.

[0105] In another example, both the trigger switch 230 and the motor 271 are integrated on the control board 260. That is, the trigger switch 230 is installed on the control board 260, and the electrical connection terminal of the motor 271 is directly connected to the control board 260, which further improves the integration of the entire door opening mechanism 200, makes the space layout more reasonable, and reduces the space occupied by the door opening mechanism 200.

[0106] In actual operation, taking the front-to-back direction of the door opening component 220 as an example, the door opening component 220 and the trigger component 240 are distributed on the left and right sides of the power component 210. The control plate 260 extends away from the power component 210 and along the front-to-back direction. In the front-to-back direction, the power component 210 is located near the top end of the door opening component 220, the trigger component 240 and the trigger switch 230 correspond to the power component 210, and the motor 271 is located near the retraction end of the door opening component 220.

[0107] Please see Figure 8 This application also provides an electrical device.

[0108] The appliance can be a refrigerator, cabinet, dishwasher, freezer, wine cabinet, etc., and there are no specific limitations.

[0109] The electrical device includes a device body 100 and a door opening mechanism 200 as described in any of the above technical solutions.

[0110] The equipment body 100 includes a housing 110 and a door 120. The door 120 covers the housing 110. The door opening mechanism 200 is installed on the housing 110 or the door 120. The door opening mechanism 220 drives the door 120 to open relative to the housing 110 during the process of moving from the recycling position to the ejection position.

[0111] The door opening mechanism 200 can be installed on the housing 110 or on the door 120.

[0112] In one example, the door opening mechanism 200 is mounted on the housing 110, and the door opening member 220 is directly opposite the door 120. During the process of moving from the retracted position to the ejected position, the door opening member 220 applies a pushing force to the door 120 to open the door 120 relative to the housing 110.

[0113] In another example, the door opening mechanism 200 is mounted on the door body 120, and the door opening member 220 is directly opposite the box body 110. During the process of moving from the retraction position to the ejection position, the door opening member 220 applies a pushing force to the box body 110, causing the door body 120 to open relative to the box body 110 under the reaction force.

[0114] It should be noted that since the electrical equipment in this application embodiment includes the door opening mechanism 200 of any of the above technical solutions, it has the technical features and beneficial effects of the door opening mechanism 200 of any of the above technical solutions, which will not be repeated here.

[0115] According to the embodiments of this application, the electrical equipment improves the ease of use of the electrical equipment and reduces the overall production cost by setting the door opening mechanism 200.

[0116] In some embodiments, the device body 100 may be provided with multiple door opening mechanisms 200. The multiple door opening mechanisms 200 may be distributed along the height direction of the device body 100 to increase the force exerted when the door 120 is opened and to improve the stability of the door 120 opening. When multiple doors 120 are provided, the multiple door opening mechanisms 200 may correspond to the multiple doors 120 so that all doors 120 can open automatically.

[0117] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0118] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0119] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0120] In the description of this application, "multiple" means two or more.

[0121] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0122] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A door opening mechanism, installed on the equipment body, characterized in that, The door opening mechanism includes: The drive device has a first transmission wheel rotatably mounted on the main body of the device at its output end; A power component is rotatably mounted on the equipment body. The power component includes a power wheel and a second transmission wheel coaxially connected, and the second transmission wheel meshes with the first transmission wheel. The door opening component is dynamically coupled to the power wheel and reciprocates between the retracted position and the ejected position under the drive of the power wheel; The first transmission wheel and the second transmission wheel are both eccentrically arranged, and the first transmission wheel and the power component are respectively provided with counterweights, so that the center of mass of the component formed by the first transmission wheel, the power component and the corresponding counterweights is located on its rotation axis.

2. The door opening mechanism according to claim 1, characterized in that, The power wheel and the second transmission wheel are integrally formed; The power component and / or the counterweight of the first transmission wheel are embedded internally or mounted on the surface.

3. The door opening mechanism according to claim 1, characterized in that, The first transmission wheel and / or the power component are made of different materials than the corresponding counterweight.

4. The door opening mechanism according to claim 1, characterized in that, At least one of the first transmission wheel and the second transmission wheel is a half gear.

5. The door opening mechanism according to any one of claims 1-4, characterized in that, Along the plane of rotation of the power component, the line connecting the center of mass of the first transmission wheel or the power component and the center of mass of the corresponding counterweight passes through the corresponding axis of rotation, and satisfies: M1*L1=M2*L2; Wherein, the mass of the first transmission wheel or the power component is M1, and the vertical distance from its center of mass to the rotation axis is L1; the weight of the counterweight corresponding to the first transmission wheel or the power component is M2, and the vertical distance from its center of mass to the corresponding rotation axis is L2.

6. The door opening mechanism according to any one of claims 1-4, characterized in that, During the process of the door opening component moving from the retraction position to the ejection position, the speed ratio between the first drive wheel and the second drive wheel tends to decrease.

7. The door opening mechanism according to any one of claims 1-4, characterized in that, The door opening mechanism also includes a trigger and a trigger switch. The trigger is movably disposed under the drive of the power wheel and triggers the trigger switch when the door opening member is in the retraction position or the ejection position. During the process of the door opening member moving between the retraction position and the ejection position driven by the power member, the trigger deactivates the trigger switch.

8. The door opening mechanism according to claim 7, characterized in that, The power wheel includes a gear portion, a cam portion, and two groove portions. Along the circumference of the power wheel, the two groove portions are respectively disposed between the two ends of the gear portion and the cam portion. When the door opening member is in the retracted position or the ejected position, the trigger member engages with one of the two recessed portions; during the process of the door opening member moving between the retracted position and the ejected position driven by the power member, the trigger member abuts against the cam portion. The door opening component is provided with a rack portion that meshes with the gear portion.

9. The door opening mechanism according to claim 8, characterized in that, A foolproof structure is provided between the first transmission wheel and the second transmission wheel, and between the gear part and the rack part.

10. An electrical appliance, characterized in that, include: The equipment body includes a housing and a door, with the door covering the housing; The door opening mechanism as described in any one of claims 1-9 is installed in the housing or the door, and the door opening member drives the door to open relative to the housing during the process of moving from the retraction position to the ejection position.

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