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 power wheel; the door opening piece is provided with a rack part meshed with the power wheel so as to reciprocate between a recovery position and an ejection position under the driving of the power wheel; and in the process that the door opening piece moves from the recovery position to the ejection position, the speed ratio of the first transmission wheel to the second transmission wheel and the speed ratio between the power wheel and the rack part are both in a decreasing trend.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a door opening mechanism and electrical equipment. Background Technology

[0002] Electrical appliances such as refrigerators typically have a self-locking force after closing, making them difficult to open. This can be inconvenient for users carrying items, or for elderly people, children, or patients. Related technologies use electric door openers to assist in opening the door; however, these electric door openers can only open the door a small gap, which has limitations. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a door opening mechanism and electrical device that can automatically open the door at a large angle, improving ease of use.

[0004] Firstly, this application provides a door opening mechanism, comprising:

[0005] The drive unit has a first transmission wheel that is rotatably mounted on the equipment body at its output end;

[0006] The power component is rotatably mounted on the equipment body. The power component includes a power wheel and a second transmission wheel that are coaxially connected. The second transmission wheel meshes with the first transmission wheel.

[0007] The door opening component is provided with a rack portion that meshes with the power wheel, so that it reciprocates between the retracted position and the ejected position under the drive of the power wheel;

[0008] During the process of the door opening component moving from the retracted position to the ejected position, the speed ratio between the first and second transmission wheels, as well as the speed ratio between the power wheel and the rack, both show a decreasing trend.

[0009] According to the door opening mechanism of this application, the torque output by the drive device is transmitted to the second drive wheel through the first drive wheel, which in turn drives the power wheel to rotate. The power wheel then drives the door opening component to reciprocate, thereby automatically opening the door. The speed ratio between the first and second drive wheels, as well as the speed ratio between the power wheel and the rack, both decrease. This achieves primary acceleration during the meshing rotation of the first and second drive wheels, and secondary acceleration during the meshing of the power wheel and the door opening component. With a constant motor speed, this significantly increases the end speed of the door opening component, facilitating a larger opening angle and improving ease of use.

[0010] According to one embodiment of this application, the first transmission wheel, the power wheel, and the second transmission wheel are all eccentrically arranged, and the rack portion is an inclined rack that is tilted relative to the movement direction of the door opening component.

[0011] According to one embodiment of this application, the first transmission wheel, the power wheel, and the second transmission wheel are non-circular gears; and / or,

[0012] The first transmission wheel, the power wheel, and the second transmission wheel are half gears.

[0013] According to one embodiment of this application, a counterweight is provided on the first transmission wheel and the power component respectively, so that the center of mass of the assembly formed by the first transmission wheel, the power component and the corresponding counterweight is located on its rotation axis.

[0014] According to one embodiment of this application, the door opening mechanism further includes a first trigger switch and a second trigger switch, wherein the first trigger switch is triggered when the door opening member is in the ejected position and the second trigger switch is triggered when the door opening member is in the retracted position.

[0015] According to one embodiment of this application, the rack portion protrudes from the body of the door opening member, and when the door opening member is in the pushed-out position, the rack portion triggers a first trigger switch;

[0016] When the door opening mechanism is in the retraction position, the drive wheel triggers the second trigger switch.

[0017] According to one embodiment of this application, a foolproof structure is provided between the first transmission wheel and the second transmission wheel, and between the power wheel and the rack portion.

[0018] According to one embodiment of this application, the door opening component is provided with buffers on both sides in the direction of movement.

[0019] According to one embodiment of this application, the door opening mechanism further includes a guide member, the main body of which slides in cooperation with the guide member to reciprocate between a retracted position and an ejected position under the guidance of the guide member.

[0020] Secondly, this application provides an electrical device. The electrical device includes:

[0021] The equipment body includes a housing and a door, with the door covering the housing;

[0022] 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 ejection position.

[0023] 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.

[0024] 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

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0027] Figure 2 This is a partial structural schematic diagram of the door opening mechanism provided in an embodiment of this application;

[0028] Figure 3 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0029] Figure 4 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0030] Figure 5 This is another partial structural schematic diagram of the door opening mechanism provided in the embodiments of this application;

[0031] Figure 6 This is a partial structural schematic diagram of the electrical equipment provided in the embodiments of this application.

[0032] Figure label:

[0033] 100. Equipment body; 110. Cabinet; 120. Door;

[0034] 200. Door opening mechanism; 210. Power component; 211. Power wheel; 2111. Trigger surface; 2114. First anti-foolproof part; 212. Second transmission wheel; 220. Door opening component; 221. Rack part; 2211. Step surface; 222. Second anti-foolproof part; 223. Ejection end; 224. Retraction end; 230. First trigger switch; 240. Second trigger switch; 270. Drive device; 271. Motor; 272. Gear set; 273. First transmission wheel; 280. Housing; 290. Buffer component. Detailed Implementation

[0035] 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.

[0036] The following is for reference. Figures 1-6 This application describes a door opening mechanism and electrical device according to embodiments thereof.

[0037] Please see Figure 1 and Figure 2This 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.

[0038] The door opening mechanism 200 includes a drive unit 270, a power component 210, and a door opening component 220.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The door opening component 220 is provided with a rack portion 221 that meshes with the drive wheel 211, so as to reciprocate between the retracted position and the ejected position under the drive of the drive wheel 211.

[0044] The drive wheel 211 has a gear structure, and the door opening member 220 has a rack portion 221 that meshes with the drive wheel 211. The drive wheel 211 meshes with the rack portion 221 of the door opening member 220, and the forward and reverse rotation of the drive wheel 211 drives the door opening member 220 to reciprocate between the retracted position and the ejected position. When the door opening member 220 is in the retracted position, it retracts into the equipment body 100 and does not interfere with the closing of the door 120, at which point the door 120 can be in a closed state. As the door opening member 220 moves from the retracted position to the ejected position under the drive of the drive member 210, it drives the door 120 to open until it reaches the ejected position, at which point the door opening member 220 moves to its furthest point, achieving the maximum opening angle of the door 120.

[0045] During the process of the door opening component 220 moving from the retracted position to the ejected position, the speed ratio between the first transmission wheel 273 and the second transmission wheel 212, as well as the speed ratio between the power wheel 211 and the rack portion 221, both show a decreasing trend.

[0046] During the process of the door opening component 220 moving 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, achieving primary acceleration. Furthermore, the speed ratio between the power wheel 211 and the rack 221 also tends to decrease. That is, as the door opening component 220 ejects, while the rotational speed of the power wheel 211 remains constant, the speed of the rack 221 tends to increase. Because the rotational speed of the power wheel 211 tends to increase, the rack 221 achieves secondary acceleration, thus realizing two-stage acceleration of the door opening component 220, greatly increasing the instantaneous speed of the door opening component 220 when it moves to the ejected position.

[0047] In actual operation, the initial speed of the door opening component 220 is low to overcome the self-locking force of the door body 120 and open the door body 120 a crack. After the self-locking force of the door body 120 is released, the door opening component 220 pushes the door body 120 to accelerate until the door opening component 220 moves to the top position, at which point the opening speed of the door body 120 reaches its maximum. This allows for automatic large-angle opening under the inertia of the door body 120, eliminating the need for manual operation and greatly improving the convenience of use.

[0048] According to the door opening mechanism 200 of this application embodiment, the torque output by the drive device 270 is transmitted to the second drive wheel 212 through the first drive wheel 273, thereby driving the power wheel 211 to rotate. The power wheel 211 then drives the door opening member 220 to reciprocate, thereby driving the door body 120 to open automatically. The speed ratio between the first drive wheel 273 and the second drive wheel 212, as well as the speed ratio between the power wheel 211 and the rack portion 221, both tend to decrease. This achieves primary acceleration during the meshing rotation of the first drive wheel 273 and the second drive wheel 212, and secondary acceleration during the meshing of the power wheel 211 and the door opening member 220. With the motor 271 rotating at a constant speed, the end speed of the door opening member 220 is greatly increased, which is beneficial for the large-angle opening of the door body 120 and improves the convenience of use.

[0049] In some embodiments, the door opening mechanism 200 may include a housing 280, which is fixedly mounted 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 its integration. When the door opening mechanism 200 is assembled onto the equipment body 100 as an integrated component, it can greatly improve assembly efficiency.

[0050] 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.

[0051] The housing 280 may be provided with a limiting groove to limit 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.

[0052] Please see Figure 2 According to some embodiments of this application, the first transmission wheel 273, the power wheel 211 and the second transmission wheel 212 can all be eccentrically arranged, and the rack portion 221 is an inclined rack that is tilted relative to the movement direction of the door opening member 220.

[0053] When gears are eccentrically positioned, the unique motion of the eccentric gear during meshing causes changes in the motion of the meshing tooth structure. At each meshing instant, the pitch circle radius (effective meshing radius) of the eccentric gear continuously changes. This complexity of motion results in uneven torque output when the eccentric gear transmits power, thus converting uniform input rotational motion into non-uniform output rotational motion.

[0054] Both the first transmission wheel 273 and the second transmission wheel 212 are eccentrically positioned.

[0055] By appropriately setting the eccentricity and initial phase angle of the first transmission wheel 273 and the second transmission wheel 212, the rotational speed of the second transmission wheel 212 can be made to increase. By adjusting their initial relative positions (phase angle), the second transmission wheel 212 is in a relatively slow starting rotational state during the initial meshing stage, i.e., when the door opening member 220 is in the retracted position. As the gears rotate, the meshing point position changes continuously due to the eccentricity, and through a reasonable eccentricity setting, the rotational radius (equivalent to the effective pitch circle radius) of the second transmission wheel 212 increases as the door opening member 220 moves from the retracted position to the ejected position, thereby increasing the rotational speed of the second transmission wheel 212.

[0056] The drive wheel 211 is eccentrically positioned, and the rack portion 221 is an inclined rack that is tilted relative to the direction of movement of the door opening member 220.

[0057] By appropriately setting the eccentricity of the drive wheel 211, the magnitude of the eccentricity affects the change in the effective radius during the meshing process between the drive wheel 211 and the helical rack. When the eccentricity is set appropriately, as the drive wheel 211 rotates, the effective radius at the meshing point with the helical rack changes, thereby altering the linear velocity. Specifically, during the process of the door opening member 220 moving from the retracted position to the ejected position, the effective radius of the meshing point between the drive wheel 211 and the rack portion 221 tends to increase.

[0058] The drive wheel 211 is located on one side of the opening member 220 in the direction of movement, and the rack portion 221 is located on the side of the opening member 220 closest to the drive wheel 211. During the movement of the opening member 220 from the retracted position to the ejected position, the rack portion 221 is inclined in the direction of movement of the opening member 220, closer to the drive wheel 211. The inclination angle of the rack is matched with that of the drive wheel 211 to ensure the meshing stability between the drive wheel 211 and the rack portion 221 during the rotation of the drive wheel 211.

[0059] In one example, the rack portion 221 can have a fixed tilt angle, making its meshing angle with the drive wheel 211 fixed. This allows the component of the force transmitted from the drive wheel 211 to the rack in the direction of rack movement to maintain a relatively stable proportional relationship. The change in linear velocity caused by the change in the effective radius of the drive wheel 211 will be transmitted along the fixed tilt direction of the rack, driving the door opening component 220 to accelerate.

[0060] Please see Figure 2 According to some embodiments of this application, the first transmission wheel 273, the power wheel 211, and the second transmission wheel 212 can be non-circular gears.

[0061] The pitch curve shape of a non-circular gear determines the variation law of its transmission ratio. When the first transmission wheel 273, the second transmission wheel 212 and the power wheel 211 are all non-circular gears, the speed of the second transmission wheel 212 and the moving speed of the rack section 221 can be increased by reasonably designing the pitch curve shape.

[0062] 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 and minor axes of the ellipse. During the initial engagement phase, i.e., when the door opening member 220 is in the retracted position, engagement begins near the position where its major axis intersects with the minor axis of the second transmission wheel 212. As the door opening member 220 moves from the retracted position to the ejected position, due to the larger radius of curvature of the elliptical gear at its major axis and smaller radius of curvature at its minor axis, under pure rolling conditions on the pitch curve, according to the gear transmission ratio formula (the transmission ratio is equal to the ratio of the radius of curvature at a point on the driving gear pitch curve to the radius of curvature at the corresponding meshing point on the driven gear pitch curve), the rotational 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.

[0063] In addition to elliptical gears, the first transmission wheel 273, the second transmission wheel 212, and the power wheel 211 can also be designed as 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.

[0064] Please see Figure 2 According to some embodiments of this application, the first transmission wheel 273, the power wheel 211, and the second transmission wheel 212 can be half gears.

[0065] That is, the first transmission wheel 273, the second transmission wheel 212, and the power wheel 211 are all incomplete gears. Because the travel of the door opening 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 opening 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, along the circumference of the first transmission wheel 273, the second transmission wheel 212, and the power wheel 211, only some teeth will engage. By setting the first transmission wheel 273, the second transmission wheel 212, and the power wheel 211 as incomplete gears, the effectively meshing teeth are retained, the space occupied by the gears is reduced, the spatial layout is optimized, the material of the parts can be reduced, the production cost can be reduced, and the product's lightweight level can be improved.

[0066] According to some embodiments of this application, the first transmission wheel 273 and the power component 210 may be provided with counterweights, so that the center of mass of the assembly formed by the first transmission wheel 273, the power component 210 and the corresponding counterweights is located on its rotation axis.

[0067] 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 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 its counterweight 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 its counterweight 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.

[0068] Please see Figures 2 to 5 According to some embodiments of this application, the door opening mechanism 200 further includes a first trigger switch 230 and a second trigger switch 240, wherein the first trigger switch 230 is triggered when the door opening member 220 is in the ejected position, and the second trigger switch 240 is triggered when the door opening member 220 is in the retracted position.

[0069] The trigger switch can be a mechanical trigger switch or a magnetic induction trigger switch, etc., and the specific form is not limited. In one example, both the first trigger switch 230 and the second trigger switch 240 are mechanical trigger switches, which are triggered by direct contact or pressing of the trigger element, and deactivated by releasing the contact or pressing. The trigger switch can send an induction signal when triggered.

[0070] By setting two trigger switches to detect the active position of the door opening component 220, the door opening mechanism 200 can be made to work automatically. This also prevents the door opening component 220 from exceeding its active stroke, reduces the phenomenon of motor 271 stalling, and improves the overall stability of operation.

[0071] In actual operation, the user sends an opening signal via physical buttons, control panel, or mobile device on the device body 100. Upon receiving the signal, the opening mechanism 200 controls the power component 210 to rotate. The rotation of the power component 210 drives the opening component 220 from the retracted position to the ejected position, thereby opening the door 120. When the opening component 220 reaches the ejected position, the door 120 is opened to its maximum angle. At this point, the first trigger switch 230 is triggered and sends the first sensing signal. Upon receiving the first sensing signal, the opening mechanism 200 controls the power component 210 to stop rotating, thus stopping the ejection action of the opening component 220. The opening mechanism 200 can control the power component 210 to reverse after a preset time (e.g., 0.1s). It should be noted that the duration of this preset time is not limited. Under the reverse action of the power component 210, the door opening component 220 is driven to move from the ejection position to the retraction position. When the door opening component 220 moves to the retraction position, it retracts into the equipment body 100 without affecting the normal closing of the door 120. This also avoids the door opening component 220 interfering with or touching the user when it is in the ejection position, thus preventing safety hazards. At this time, the second trigger switch 240 is triggered 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.

[0072] Please see Figures 2 to 5 According to some embodiments of this application, the rack portion 221 protrudes from the body of the door opening member 220. When the door opening member 220 is in the ejected position, the rack portion 221 triggers the first trigger switch 230; when the door opening member 220 is in the retracted position, the drive wheel 211 triggers the second trigger switch 240.

[0073] The rack portion 221 protrudes from the body of the door opener 220. Furthermore, the rack portion 221 is inclined in the direction close to the drive wheel 211 in the direction of movement of the door opener 220 from the retracted position to the ejected position, so that a stepped surface 2211 is formed between the rack portion 221 and the body of the door opener 220, and the stepped surface 2211 is positioned towards the ejected end 223 of the door opener 220. The first trigger switch 230 can be directly opposite the stepped surface 2211 in the direction of movement of the door opener. When the door opener 220 moves from the retracted position to the ejected position, the stepped surface 2211 gradually approaches the first trigger switch 230 until the stepped surface 2211 contacts the first trigger switch 230 and triggers the first trigger switch 230, thereby determining that the door opener 220 has reached the ejected position.

[0074] The drive wheel 211 is a half-gear. Along the rotation plane of the drive wheel 211, a trigger surface 2111 is provided on the periphery of the drive wheel 211 outside the gear portion. The second trigger switch 240 is located in the annular area formed by the rotation of the trigger surface 2111, so that the trigger surface 2111 can contact the second trigger switch 240 when it rotates to a certain angle. When the rack part 221 moves from the retracted position to the ejected position, taking the counterclockwise rotation of the drive wheel 2111 as an example, when the rack part 221 moves from the ejected position to the retracted position, the drive wheel 2111 rotates clockwise, and the trigger surface 2111 rotates clockwise until it contacts the second trigger switch 240 and triggers the second trigger switch 240, thereby determining that the door opening member 220 has reached the retracted position.

[0075] Please see Figures 2 to 5 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 power wheel 211 and the rack portion 221.

[0076] 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 correspond to each other. During assembly, it is necessary to ensure that the meshing position of the power wheel 211 and the rack portion 221 of the door opening component 220 is accurate to ensure the accurate and stable operation of the door opening mechanism 200. By setting a foolproof structure between the first transmission wheel 273 and the second transmission wheel 212, and between the gear portion and the rack portion 221, the accuracy and stability of assembly are improved, and production efficiency is increased.

[0077] 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.

[0078] In another example, the gear portion and the rack portion 221 are respectively provided with a first anti-mistake part 2114 and a second anti-mistake part 222 that cooperate with each other. The first anti-mistake part 2114 can be an anti-mistake protrusion, which connects between two adjacent teeth of the gear portion and is directly opposite 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. Without affecting the meshing, it is not easy to assemble incorrectly.

[0079] Please see Figures 2 to 5 According to some embodiments of this application, the door opening member 220 is provided with buffer members 290 on both sides in the direction of movement.

[0080] When the door opening component 220 moves to the top position or the retracted position, the buffer component 290 can play a role in buffering and shock absorption. When the door opening component 220 moves at a relatively fast speed, it can reduce the noise generated by the collision between the door opening component 220 and the limit component, improve the user experience, reduce the damage caused by the impact component, protect the door opening component 220 and the trigger switch, and improve durability.

[0081] For example, the door opening member 220 is installed inside the housing 280, which serves to limit and protect the door opening member 220. One buffer member 290 can be disposed at the retracted end 224 of the door opening member 220, which is one end disposed inside the housing 280, so as to abut against the rear wall of the housing 280 for cushioning when the door opening member 220 moves to the retracted position. The other buffer member 290 can be disposed on the side of the rack portion 221 near the ejector end 223 of the door opening member 220, which is one end extending outside the housing 280. The rack portion 221 always moves inside the housing 280 and abuts against the front wall of the housing 280 for cushioning when the door opening member 220 moves to the ejector position.

[0082] The door opening mechanism 200 also includes a guide member, the main body of the door opening member 220 slidingly engaging with the guide member to reciprocate between the retracted position and the ejected position under the guidance of the guide member.

[0083] By setting guide members to limit and constrain the main body of the door opening member 220, the stability of the door opening member 220's movement is ensured. In one example, the guide member can be a guide groove set inside the housing 280, and the main body of the door opening member 220 is slidably installed in the guide groove. The side wall of the guide groove can be provided with a clearance opening for the rack portion 221 to extend out. In another example, the guide member can be a guide rail set on the bottom wall or top wall of the housing 280, and the main body of the door opening member 220 is provided with a groove that mates with the guide rail.

[0084] Please see Figure 6 This application also provides an electrical device.

[0085] The appliance can be a refrigerator, cabinet, dishwasher, freezer, wine cabinet, etc., and there are no specific limitations.

[0086] The electrical device includes a device body 100 and a door opening mechanism 200 as described in any of the above technical solutions.

[0087] 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.

[0088] The door opening mechanism 200 can be installed on the housing 110 or on the door 120.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0097] In the description of this application, "multiple" means two or more.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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. An open door mechanism installed in a device body, characterized by, The door opening mechanism comprises: a driving device, an output end of the driving device being provided with a first transmission wheel rotatably mounted on the device body; a power member rotatably mounted 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; a door opening member provided with a rack portion engaged with the power wheel to reciprocate between a recovery position and an ejection position under the drive of the power wheel; wherein, 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 and the speed ratio between the power wheel and the rack portion are both decreasing.

2. The door opening mechanism according to claim 1, characterized in that The first transmission wheel, the power wheel and the second transmission wheel are all eccentrically arranged, and the rack portion is an inclined rack inclined relative to the movement direction of the door opening member.

3. The door opening mechanism of claim 2, wherein The first transmission wheel, the power wheel and the second transmission wheel are non-circular gears; and / or, The first transmission wheel, the power wheel and the second transmission wheel are half gears.

4. The door opening mechanism of claim 2, wherein Counterweights are respectively arranged on the first transmission wheel and the power member, so that the center of mass of the assembly formed by the first transmission wheel, the power member and the corresponding counterweight is located on the rotation axis thereof.

5. The door opening mechanism according to any one of claims 1 to 4, characterized in that Further comprising a first trigger switch and a second trigger switch, the first trigger switch being triggered when the door opening member is located at the ejection position, and the second trigger switch being triggered when the door opening member is located at the recovery position.

6. The door opening mechanism of claim 5, wherein The rack portion protrudes from the body of the door opening member, and the rack portion triggers the first trigger switch when the door opening member is located at the ejection position; The power wheel triggers the second trigger switch when the door opening member is located at the recovery position.

7. The door opening mechanism according to any one of claims 1 to 4, characterized in that Anti-fool structures are arranged between the first transmission wheel and the second transmission wheel, and between the power wheel and the rack portion.

8. The door opening mechanism according to any one of claims 1 to 4, characterized in that Buffer members are arranged on both sides of the door opening member in the movement direction.

9. The door opening mechanism according to any one of claims 1 to 4, characterized in that Further comprising a guide member, the main body of the door opening member being slidingly fitted with the guide member to reciprocate between the recovery position and the ejection position under the guidance of the guide member.

10. An electrical appliance characterized by Comprise: a device body comprising a box body and a door body, the door body being arranged on the box body; The door opening mechanism according to any one of claims 1-9 is mounted on the box body or the door body, and the door opening member drives the door body to open relative to the box body during the movement from the recovery position to the ejection position.

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