Door opening device and electrical equipment

Abstract

The utility model discloses a door opening device and electrical equipment, the door opening device is used for opening two door bodies arranged on a main body, and the door opening device comprises two pushing pieces arranged on the main body and used for opening the two door bodies respectively; the transmission assembly comprises two transmission parts and two output parts, and the output parts are in dynamic coupling with the corresponding transmission parts and the corresponding pushing parts so as to drive the corresponding pushing parts to be switched between the initial position and the stretching-out position; the driving assembly is arranged on the main body and is in power coupling with the two transmission parts; and in the process that the pushing piece moves from the initial position to the extending position, the speed ratio of the transmission piece to the output piece is in a decreasing trend.

Description

TECHNICAL FIELD

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

[0002] With the improvement of living standards, electrical appliances such as refrigerators, dishwashers and disinfection cabinets are widely used in people's lives. In order to maintain the sealing performance of the above-mentioned electrical appliances, an adsorption structure or a negative pressure is usually arranged between the cabinet and the door body to stably fix the door body on the cabinet.

[0003] At present, an opening is generally arranged on the cabinet, and a door body is arranged at the opening. The door body rotates relative to the cabinet to open or close the opening. A user opens the opening by rotating the door body to obtain an article from the cabinet or puts the article into the cabinet. In some cases, it is difficult to open the door, for example, the user holds articles with both hands, has to put down the articles, releases at least one hand to open the door body, and then picks up the put-down articles and moves them into the refrigerator, which is poor in user experience. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a door opening device and an electrical appliance, which aims to at least solve the technical problem of difficult door opening and poor user experience to a certain extent.

[0005] In a first aspect, a door opening device is provided, which is used to open two door bodies arranged on a main body, and comprises:

[0006] Two pushers are arranged on the main body and used to open the two door bodies respectively.

[0007] A transmission assembly comprises two transmission members and two output members. The output members are power-coupled with the corresponding transmission members and the pushers to drive the corresponding pushers to switch between an initial position and an extended position.

[0008] A driving assembly is arranged on the main body and power-coupled with the two transmission members.

[0009] In the process that the pusher moves from the initial position to the extended position, the speed ratio of the transmission member to the output member presents a decreasing trend.

[0010] The door opening device of the present application, the torque output by the driving assembly is transmitted to the two pushers through the transmission assembly to drive the two pushers to switch between the initial position and the extended position, thereby realizing the automatic opening of the two door bodies. One driving assembly opens two door bodies, freeing the user's hands, saving time and effort, and improving the user's experience. Since the speed ratio of the transmission member and the output member decreases from the initial position to the extended position of the pusher, the initial driving force transmitted by the transmission member to the output member is large, and the linear speed of the transmission member gradually increases. The large initial driving force enables the pusher to overcome the magnetic force and negative pressure, and the door body opens smoothly; the linear speed of the transmission member gradually increases, and the extension speed of the pusher also gradually increases, thereby realizing the large-angle opening of the door body, improving the operation convenience, and improving the user experience.

[0011] In some embodiments, during the movement of the pusher from the initial position to the extended position, the distance between the power coupling of the transmission member and the output member and the center of rotation of the transmission member increases.

[0012] In some embodiments, the door opening device further comprises two trigger switches; the output member is provided with a trigger surface extending in the circumferential direction; and the output member triggers the trigger switches through the trigger surface during the movement of the pusher between the initial position and the extended position.

[0013] In some embodiments, the transmission member and the output member each comprise a non-circular gear portion arranged eccentrically, and the gear teeth of the non-circular gear portion are distributed along a spiral line.

[0014] In some embodiments, the transmission member and the output member are each provided with a counterweight for adjusting the center of mass.

[0015] In some embodiments, the non-circular gear portion of the transmission member comprises a rotating portion and an engaging portion located outside the rotating portion; the counterweight is located in the rotating portion and is distributed on opposite sides of the center of rotation of the transmission member at the position of maximum radial dimension of the engaging portion.

[0016] In some embodiments, the output member further comprises a tooth plate coaxially arranged with the non-circular gear portion; the counterweight is located on the tooth plate and is distributed on opposite sides of the center of rotation of the output member at the position of maximum radial dimension of the non-circular gear portion.

[0017] In some embodiments, the transmission member and the output member are each provided with at least one recess, and the counterweight is embedded in the recess.

[0018] In some embodiments, the profile of the counterweight is fan-shaped, and the center of the fan-shaped profile and the center of rotation of the transmission member or the output member on which the counterweight is located are located on the same side of the counterweight.

[0019] In a second aspect, the present application provides an electric appliance. The electric appliance comprises a main body, two door bodies movably arranged on the main body, and an opening door device mounted on the main body, wherein the pushing member pushes the corresponding door body to open relative to the main body in the process from the initial position to the extended position.

[0020] The electric appliance provided in the second aspect of the present application has the same beneficial effects as the opening door mechanism provided in the first aspect of the present application, which will not be repeated here.

[0021] Additional aspects and advantages of the present application will be described in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 A top view of the opening door device provided in the embodiments of the present application is shown.

[0024] Figure 2 A structure schematic view of the driving assembly in the opening door device of Figure 1 is shown.

[0025] Figure 3 A bottom view of the driving assembly of Figure 2 is shown.

[0026] Figure 4 A perspective structure view of the driving assembly of Figure 2 at an angle is shown.

[0027] Figure 5 A perspective structure view of the driving assembly of Figure 2 at another angle is shown.

[0028] Figure 6 A top view of the transmission assembly of Figure 1 cooperating with the third double gear is shown.

[0029] Figure 7 A bottom view of the transmission assembly of Figure 6 cooperating with the third double gear is shown.

[0030] Figure 8 A perspective structure view of the transmission assembly of Figure 6 cooperating with the third double gear at an angle is shown.

[0031] Figure 9 A structural schematic view of the transmission member in the Figure 1 is shown.

[0032] Figure 10 A structural schematic view of the output member in the Figure 1 is shown.

[0033] Figure 11 A structural schematic view of the pushing member in the Figure 1 is shown.

[0034] Figure 12 A structural schematic view of the transmission assembly, the pushing member and the trigger switch cooperating when the pushing member is in the initial position is shown.

[0035] Figure 13 A partial enlarged view of the trigger switch in the Figure 12 is shown.

[0036] Figure 14 A structural schematic view of the transmission assembly, the pushing member and the trigger switch cooperating when the pushing member is in the extended position is shown.

[0037] Figure 15 A structural schematic view of the transmission assembly, the pushing member and the trigger switch cooperating when the pushing member is in the intermediate position between the initial position and the extended position is shown.

[0038] Figure 16 A partial enlarged view of the trigger switch in the Figure 15 is shown.

[0039] Figure 17 A structural schematic view of the electric appliance according to the embodiments of the present application is shown.

[0040] Reference signs:

[0041] 1000 - electric appliance, 1100 - door opening device, 1200 - main body, 1300 - door body, 1301 - first door body, 1302 - second door body;

[0042] 100 - driving assembly, 110 - driving member, 120 - double gear, 120a - first double gear, 120b - second double gear, 120c - third double gear, 121 - input wheel, 122 - output wheel;

[0043] 200 - transmission assembly, 210 - reversing gear, 220 - transmission member, 220a - first transmission member, 220b - second transmission member, 221 - non-circular gear portion of transmission member, 2211 - rotating portion, 2212 - engaging portion, 2213 - groove, 222 - transmission wheel, 230 - output member, 230a - first output member, 230b - second output member, 231 - non-circular gear portion of output member, 232 - toothed plate, 2321 - second tooth portion, 2322 - cam portion, 2323 - groove portion, 2323a - first groove portion, 2323b - second groove portion, 2324 - triggering surface, 240 - counterweight member;

[0044] 300 - pushing member, 310 - push rod, 320 - first tooth portion, 330 - damping member;

[0045] 400 - trigger switch, 410 - roller, 420 - trigger spring, 431 - fixed contact; 500 - housing. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0047] It should be noted that all the directional indications in the embodiments of the utility model are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0048] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be the communication inside two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0049] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0050] The present application will be described below in conjunction with the drawings and specific embodiments:

[0051] Figure 1 The top view of the door opening device provided by the embodiment of the present application is shown, please refer to Figure 1 The embodiment of the present application provides a door opening device 1100, the door opening device 1100 provided by the embodiment of the present application can automatically open two door bodies 1300 on the main body 1200, without the user to open the door body 1300 with hand, free the user's hands, save time and effort, improve the user's experience.

[0052] The door opening device 1100 provided by the present application comprises a pushing member 300, a transmission assembly 200 and a driving assembly 100.

[0053] The pushing member 300 is used to open the door body 1300, and the pushing member 300 is provided with two, so that two door bodies 1300 on the main body 1200 can be opened respectively. The transmission assembly 200 is used to transmit power to the pushing member 300, and comprises a transmission member 220 and an output member 230, the transmission member 220 and the output member 230 are both provided with two, the output member 230 is power coupled with the corresponding transmission member 220 and the pushing member 300, the power can be transmitted to the pushing member 300 in turn by the corresponding transmission member 220 and the output member 230, and the pushing member 300 can be switched between the initial position and the extended position. The driving assembly 100 is arranged on the main body 1200, which realizes the installation and fixation of the driving assembly 100, and the driving assembly 100 is power coupled with the two transmission members 220, so that the driving assembly 100 can transmit power to the two transmission members 220 at the same time, and then transmit the power to the door body 1300 through the corresponding output member 230 and the pushing member 300, so that the two door bodies 1300 can be opened at the same time.

[0054] The driving assembly 100 sequentially transmits power to the transmission member 220, the output member 230 and the pushing member 300, so that the pushing member 300 is switched from the initial position to the extended position, so that the door body 1300 can be automatically opened. In the condition that the user holds something with both hands or the hands are dirty, the user does not need to pull the door body 1300 with hands, which liberates the hands of the user, saves time and effort, and improves the use experience of the user. The driving assembly 100 is power-coupled with the two transmission members 220, and the corresponding transmission member 220, output member 230 and pushing member 300 are sequentially power-coupled, so that one driving assembly 100 can simultaneously open two door bodies 1300. Compared with the mode that two sets of independent door opening devices 1100 respectively open two door bodies 1300, the number of parts is reduced, and the cost and manufacturing difficulty are reduced.

[0055] In the process that the pushing member 300 moves from the initial position to the extended position, the speed ratio of the transmission member 220 and the output member 230 shows a decreasing trend. The speed ratio, also called transmission ratio, is the ratio of the rotational speed of the transmission member 220 and the output member 230 in the transmission system, and is also the ratio of the angular velocity. In the process that the door body 1300 is switched from the closed state to the open state, the transmission member 220 and the output member 230 are power-coupled, so the linear velocities of the two are equal, the rotational angular velocity of the transmission member 220 is provided by the driving assembly 100 and does not change, and therefore the speed ratio of the transmission member 220 and the output member 230 gradually decreases, and it can be known that the rotational angular velocity of the output member 230 decreases. Since the linear velocity is equal to the angular velocity multiplied by the rotational radius (the distance from the rotation center to the power-coupled position), in the process that the door body 1300 is switched from the closed state to the open state, the ratio of the rotational radius of the transmission member 220 to the rotational radius of the output member 230 gradually increases, and the distance between the rotation centers of the transmission member 220 and the output member 230 is a constant, so the rotational radius of the transmission member 220 gradually increases, and the rotational radius of the output member 230 gradually decreases. Considering that the torque is the product of the rotational radius (force arm) and the driving force, in the process that the pushing member 300 moves from the initial position to the extended position, the driving force obtained by the pushing member 300 gradually decreases.

[0056] Since the soft door seal with a magnetic strip between the door body 1300 and the main body 1200 of the refrigerator has a large contact area with the main body 1200 and good sealing performance, when the door body 1300 is opened, 40N-70N of opening force is required to open the door body 1300 due to the magnetic force and the negative pressure in the internal space, which is time-consuming and labor-intensive. In the present application, the pushing member 300 obtains a larger driving force at the initial position, which can provide a larger door opening force for the door body 1300, thereby breaking through the door opening resistance and stably opening the door body 1300, to a certain extent, improving the problem of difficult door opening and improving the convenience and efficiency of door opening operation.

[0057] Furthermore, since linear velocity equals angular velocity multiplied by the radius of rotation, and the radius of rotation of the transmission component 220 gradually increases as the pushing component 300 moves from the initial position to the extended position, it can be determined that the linear velocity of the transmission component 220 also gradually increases. This means that the extension speed of the pushing component 300 changes from small to large as it moves from the initial position to the extended position. Once the door 1300 is opened, the required pushing force decreases, and it will quickly spring open. However, after the pushing component 300 moves to the extended position, it will retract back to the initial position. Thus, the door 1300 can only open to a small angle and cannot achieve a large-angle opening. In contrast, in this application, the extension speed of the pushing component 300 increases as it moves from the initial position to the extended position. The pushing component 300 can continuously do work on the door 1300, and the gradually increasing opening speed is conducive to achieving a large-angle opening, improving operational convenience and enhancing the user experience.

[0058] For ease of explanation, the two transmission components 220 are defined as the first transmission component 220a and the second transmission component 220b, respectively, and the two output components 230 are defined as the first output component 230a and the second output component 230b, respectively. The first output component 230a and the second output component 230b are respectively poweredly coupled to the two pusher components 300. Having understood the above, the technical solution of this application will be explained in further detail below.

[0059] Please see Figures 2 to 5 The drive assembly 100 serves as a power-providing structure and may include a drive member 110 and a gear reduction mechanism. The output end of the drive member 110 is poweredly coupled to two transmission members 220 through the gear reduction mechanism to transmit torque to the two transmission members 220.

[0060] In some embodiments, the drive element 110 is a drive motor, and the output end of the drive motor is a worm gear that meshes with a gear reduction mechanism to transmit torque. In other embodiments, the output end of the drive motor is a gear shaft that meshes with a gear reduction mechanism to transmit power.

[0061] The gear reduction mechanism may include multiple sequentially coupled double gears 120, such as two or three double gears 120. The double gears 120 are located in the main body 1200 and include two coaxially arranged input gears 121 and output gears 122. The diameter of the coaxially arranged input gears 121 is larger than the diameter of the output gears 122 to achieve speed reduction and increase driving force.

[0062] In some embodiments, please refer to Figures 2 to 5There are three double gears 120, namely a first double gear 120a, a second double gear 120b, and a third double gear 120c. The input wheel 121 of the first double gear 120a is dynamically coupled to the drive member 110. The output wheel 122 of the first double gear 120a is dynamically coupled to the input wheel 121 of the second double gear 120b. The output wheel 122 of the second double gear 120b is dynamically coupled to the input wheel 121 of the third double gear 120c. The output wheel 122 of the third double gear 120c is dynamically coupled to the first transmission member 220a and the second transmission member 220b, thereby realizing the transmission of torque from the drive member 110 to the two transmission members 220.

[0063] In some embodiments, the double gear 120 can be a one-piece structure to improve the assembly efficiency and operational stability of the double gear 120. Of course, in other embodiments, the input gear 121 and the output gear 122 of the double gear 120 can also be separate structures, which can also achieve torque transmission. This application does not impose any limitations.

[0064] As a structure that transmits torque to the two pushing members 300, the transmission assembly 200, in some embodiments, shows an increasing distance between the power coupling point of the transmission member 220 and the output member 230 and the rotation center of the transmission member 220 during the movement of the pushing member 300 from the initial position to the extended position. This means the radius of rotation gradually increases, and the driving force is inversely proportional to the radius of rotation. Therefore, the driving force applied by the transmission member 220 to the output member 230 gradually decreases, meeting the requirement of a large opening force to overcome the magnetic force and the negative pressure of the internal space to open the door 1300, resulting in smoother opening. Furthermore, the angular velocity of the transmission member 220 itself remains unchanged. As the radius of rotation gradually increases during the movement of the pushing member 300 from the initial position to the extended position, the linear velocity also gradually increases, meaning the extension speed of the pushing member 300 also gradually increases. This increased opening speed facilitates large-angle opening, improves operational convenience, and enhances the user experience.

[0065] In some embodiments, both the transmission member 220 and the output member 230 may include eccentrically arranged non-circular gear portions 221 and 231, the teeth of which are distributed along a helix. This helix can be an Archimedean spiral, a hyperbolic curve, an involute curve, or the like.

[0066] Please see Figure 8The non-circular gear portion 221 of the transmission member 220 meshes with the non-circular gear portion 221 of the output member 230 to realize torque transmission between the transmission member 220 and the output member 230. Since the non-circular gear portion 221 is eccentrically set, the speed ratio changes during the meshing and rotation of the non-circular gear portion 221 of the transmission member 220 and the non-circular gear portion 231 of the output member 230, thereby changing the pushing force and pushing speed of the push member 300 to break the magnetic force and negative pressure to open the door, and realize the smooth opening of the large-angle door 1300.

[0067] In some embodiments, the non-circular gear portions 221 and 231 can be elliptical gears or half-gears. In some embodiments, both the non-circular gear portion 221 of the output member 230 and the non-circular gear portion 231 of the transmission member 220 can be elliptical gears or half-gears. In other embodiments, one of the non-circular gear portions 231 of the output member 230 and the other of the non-circular gear portion 221 of the transmission member 220 is an elliptical gear and the other is a half-gear.

[0068] Taking the non-circular gear portions 221 and 231 of the output component 230 and the transmission component 220 as half gears as an example, in actual execution, because the travel of the pusher 300 is limited and the rotation angle of the drive component 110 is also limited, during the reciprocating motion of the drive component 110 driving the pusher 300 from the initial position to the extended position, the rotation angle of the output component 230 and the transmission component 220 is less than 360°. That is to say, the non-circular gear portion 231 of the output component 230 and the non-circular gear portion 221 of the transmission component 220 only have partial tooth meshing. By setting the non-circular gear portion 221 as a half gear and retaining the effectively meshing gear teeth, the material of the parts can be reduced, the production cost can be reduced, and the product's lightweight level can be improved.

[0069] In some embodiments, please refer to Figure 9 The non-circular gear portion 221 may include a rotating portion 2211 and a meshing portion 2212 located outside the rotating portion 2211. The rotating portion 2211 is disposed on the main body 1200, and the meshing portion 2212 of the transmission member 220 meshes with the meshing portion 2212 of the output member 230. The meshing portion 2212 may completely surround the outside of the rotating portion 2211, or it may only surround a part of the rotating portion 2211; either way, it constitutes the non-circular gear portion 221.

[0070] In some embodiments, please refer to Figure 8 The transmission component 220 may also include a transmission wheel 222, which is coaxial with the non-circular gear part 221. The transmission wheel 222 of the first transmission component 220a and the transmission wheel 222 of the second transmission component 220b are both dynamically coupled to the output wheel 122 of the third double gear 120c in the drive assembly 100, so as to realize the transmission of driving force from the drive assembly 100 to the transmission assembly 200.

[0071] In some embodiments, please continue reading Figure 8 The output member 230 may also include a toothed plate 232 coaxially arranged with the non-circular gear part 231. The toothed plate 232 of the first output member 230a and the toothed plate 232 of the second output member 230b are respectively poweredly coupled to the two pushers 300 to realize the transmission of torque from the output member 230 to the pusher 300, so that the pusher 300 can switch between the initial position and the extended position.

[0072] In some embodiments, the toothed plate 232 of the output member 230 and the non-circular gear portion 231 can be integrally formed, and the transmission wheel 222 of the transmission member 220 and the non-circular gear portion 221 can be integrally formed, so as to improve the assembly efficiency and working stability of the output member 230 and the transmission member 220.

[0073] In some embodiments, please refer to Figure 7 as well as Figure 8 The transmission assembly 200 also includes a reversing gear 210 disposed on the main body 1200. The reversing gear 210 is poweredly coupled to the output wheel 122 of the third double gear 120c and the second transmission wheel 222, so that the rotation directions of the first transmission member 220a and the second transmission member 220b are opposite, so that the first push member 300 and the second push member 300 move in the same direction, and the two doors 1300 can be opened at the same time, which improves the opening efficiency, reduces the user's waiting time, and improves the user experience.

[0074] In other embodiments, the transmission assembly 200 may further include a fourth double gear 1 and a fifth double gear, both disposed on the main body 1200. The fourth double gear and the fifth double gear each have a connecting wheel and an incomplete gear. The circumferential surface of the incomplete gear has meshing teeth in a partial area, while the remaining part is a smooth surface. The two incomplete gears are symmetrically arranged. The drive assembly 100 is dynamically coupled to the connecting wheel of the fourth double gear and the fifth double gear. The incomplete gears of the fourth double gear and the fifth double gear are dynamically coupled to the first transmission member 220a and the second transmission member 220b, respectively.

[0075] When the drive assembly 100 rotates forward, the meshing teeth of the incomplete gear of the fourth double gear couple with the first transmission member 220a to achieve power transmission. The push member 300 corresponding to the first transmission member 220a switches from the initial position to the extended position. The smooth surface of the incomplete gear of the fifth double gear engages with the second transmission member 220b, but does not transmit power. The push member 300 corresponding to the second transmission member 220b does not operate. When the drive assembly 100 rotates in reverse, the meshing teeth of the incomplete gear of the fourth double gear couple with the first transmission member 220a to achieve power transmission. The push member 300 corresponding to the first transmission member 220a switches from the extended position to the initial position. The push member 300 corresponding to the second transmission member 220b still does not operate. The drive assembly 100 continues to reverse. The meshing teeth of the incomplete gear of the fifth double gear couple with the second transmission member 220b to achieve power transmission. The pusher 300 corresponding to the second transmission member 220b switches from the extended position to the initial position. The smooth surface of the incomplete gear of the fourth double gear engages with the first transmission member 220a, but does not transmit power. The pusher 300 corresponding to the first transmission member 220a does not move. The drive assembly 100 rotates. The meshing teeth of the incomplete gear of the fifth double gear couple with the second transmission member 220b to achieve power transmission. The pusher 300 corresponding to the second transmission member 220b switches from the initial position to the extended position. The smooth surface of the incomplete gear of the fourth double gear engages with the first transmission member 220a, but does not transmit power. The pusher 300 corresponding to the first transmission member 220a does not move. As can be seen from the above, a drive component 100 enables the sequential action of two pushers 300, so that the two doors 1300 can be opened or closed independently. Without increasing the motor power and cost, it ensures that the pusher 300 can obtain a large opening force, thereby smoothly opening the door 1300.

[0076] In some embodiments, please refer to Figure 9 as well as Figure 10Each of the first transmission component 220a, the second transmission component 220b, the first output component 230a, and the second output component 230b is equipped with a counterweight 240 for adjusting the center of gravity. Since both the transmission component 220 and the output component 230 include an eccentrically positioned non-circular gear portion 221, the centers of gravity of the transmission component 220 and the output component 230 are not located at their respective rotation centers, affecting the stability of the transmission component 220 and the output component 230 during rotation and easily generating noise. By providing counterweights 240 to the first transmission member 220a, the second transmission member 220b, the first output member 230a, and the second output member 230b, the center of mass of the structure formed by the first transmission member 220a and the counterweight 240 is located at the rotation center of the first transmission member 220a; the center of mass of the structure formed by the second transmission member 220b and the counterweight 240 is located at the rotation center of the second transmission member 220b; the center of mass of the structure formed by the first output member 230a and the counterweight 240 is located at the rotation center of the output member 230; and the center of mass of the structure formed by the second output member 230b and the counterweight 240 is located at the rotation center of the second output member 230b. This improves the rotational stability of the output member 230 and the transmission member 220, reduces noise during operation, increases transmission efficiency, and enhances the user experience.

[0077] In some embodiments, please refer to Figure 9 The counterweight 240 can be disposed on the rotating part 2211, for example, by adhesive or bolt connection, which is simple to assemble and easy to adjust. The counterweight 240 and the meshing part 2212 are distributed at their maximum radial dimensions on opposite sides of the rotation center of the transmission member 220, so that the center of mass of the transmission member 220 is close to the rotation center. In some embodiments, the counterweight 240 can also be disposed on the transmission wheel 222 of the transmission member 220, which also makes the center of mass of the transmission member 220 close to the rotation center.

[0078] In some embodiments, please refer to Figure 9 The transmission component 220 is provided with at least one groove 2213, and the counterweight 240 is embedded in the groove 2213. The groove 2213 can reduce the weight of the transmission component 220 and also serve as a space to accommodate the counterweight 240. In addition, the embedded installation of the counterweight 240 can make the position of the counterweight 240 more accurate and further improve the smoothness of operation.

[0079] In some embodiments, the counterweight 240 and the transmission component 220 can be an integral structure, for example, obtained by integral injection molding. Of course, the counterweight 240 and the transmission component 220 can also be separate structures, and this application does not impose any limitations. In other embodiments, the counterweight 240, the transmission component 220, and the output component 230 are made of different materials. The counterweight 240 can be made of a material with a higher density, such as metal, thereby making the counterweight 240 smaller in size, occupying less space, and facilitating the adjustment of the stability of the transmission component 220 and the output component 230.

[0080] When the counterweight 240 is embedded in the groove 2213, the counterweight 240 can be directly injection molded into the corresponding part using an integral injection molding method, which greatly improves production efficiency and ensures the overall connection strength.

[0081] In some embodiments, please refer to Figure 10 The counterweight 240 can be located on the gear plate 232, and its radial dimension is maximized at the non-circular gear portion 221 on opposite sides of the rotation center of the output member 230, so that the center of mass of the output member 230 is close to the rotation center. When the counterweight 240 is located on the gear plate 232, the rotation shaft of the output member 230 can be a large-diameter rotation shaft, thus facilitating the arrangement of the counterweight 240 and the large-diameter rotation shaft. In other embodiments, the counterweight 240 can also be located on the rotating portion 2211 of the non-circular gear portion 221 of the output member 230, which also allows the center of mass of the output member 230 to be close to the rotation center.

[0082] In some embodiments, please continue reading Figure 10 The counterweight 240 has a fan-shaped profile. The center of the fan-shaped profile is on the same side as the rotation center of the transmission component 220 or the output component 230. Therefore, the arc length of the counterweight 240 is shorter on the side closer to the rotation center and longer on the side farther away from the rotation center, which is more conducive to balancing the center of mass.

[0083] In some embodiments, multiple counterweights 240 may be provided, and the multiple counterweights 240 are distributed along a circumference centered on the rotation center, which can also achieve the adjustment of the center of mass.

[0084] The pusher 300 serves as the structure for opening the door 1300. Driven by the forward and reverse rotation of the drive assembly 100, the pusher 300 switches between an initial position and an extended position. When the pusher 300 is in the initial position, the door 1300 can switch from an open state to a closed state without interfering with the pusher 300. During the process of the pusher 300 switching from the initial position to the extended position, the corresponding door 1300 can be pushed open, achieving the maximum opening angle of the door 1300.

[0085] Please see Figure 11The pusher 300 may include a push rod 310. The push rod 310 has a first tooth 320 extending axially to form a rack-shaped structure. The first tooth 320 meshes with the tooth plate 232 of the corresponding output member 230 to form a gear rack linear transmission mechanism, so that the output member 230 transmits power to the push rod 310, thereby switching the push rod 310 between the initial position and the extended position.

[0086] The pusher 300 may include a first sliding structure and a second sliding structure. The first sliding structure is disposed on the push rod 310, and the second sliding structure is mounted on the main body 1200. The first sliding structure and the second sliding mechanism cooperate to allow the pusher 300 to slide stably relative to the main body 1200, thereby switching between an initial position and an extended position. In some embodiments, one of the first sliding structure and the other of the second sliding structure is a slider and the other is a slide rail. The slider and the slide rail cooperate to improve the stability of the pusher 300 during the sliding process.

[0087] Please continue reading. Figure 11 The pusher 300 also includes a shock absorber 330 located at the end of the push rod 310. The shock absorber 330 is used to contact the corresponding door body 1300, thereby reducing door opening noise and vibration. The shock absorber 330 can be made of rubber or sponge, etc., and this application does not impose any restrictions.

[0088] In some embodiments, the door opening device 1100 further includes a controller and two trigger switches 400. The toothed plate 232 of the output member 230 is provided with a trigger surface 2324 extending in the circumferential direction. During the process of the output member 230 driving the push member 300 to move between the initial position and the extended position, the trigger switch 400 is triggered by the trigger surface 2324, thereby determining the position of the corresponding push member 300.

[0089] The trigger switch 400 can be a mechanical trigger switch 400 or an inductive trigger switch 400, etc., and the specific form is not limited. In one embodiment, the trigger switch 400 is a mechanical trigger switch 400, which is triggered by the trigger spring 420 directly touching or pressing the fixed contact 431, and the trigger is released when the contact or press is released. When triggered, the trigger switch 400 can send an inductive signal to the controller.

[0090] In some embodiments, please refer to Figure 10 The toothed plate 232 includes a second tooth 2321, a cam 2322 and two grooves 2323. Along the circumference of the toothed plate 232, the two grooves 2323 are located between the two ends of the second tooth 2321 and the cam 2322. The second tooth 2321 meshes with the first tooth 320 of the push door member. The side of the cam 2322 forms a trigger surface 2324.

[0091] The two recessed portions 2323 are respectively the first recessed portion 2323a and the second recessed portion 2323b. Please refer to [link / reference]. Figure 12 as well as Figure 13 When the pusher 300 is in the initial position, the roller 410 of the trigger switch 400 is located in the first groove 2323a, the trigger spring 420 is separated from the fixed contact 431, and the trigger switch 400 is in the open state. (See also...) Figure 13 as well as Figure 14 When the pusher 300 is in the extended position, the roller 410 of the trigger switch 400 is located in the second recess 2323b, the trigger spring 420 separates from the fixed contact 431, and the trigger is released. Please refer to Figure 15 as well as Figure 16 During the movement of the pusher 300 between the initial position and the extended position, the cam 2322 presses the roller 410 of the trigger switch 400, the trigger spring 420 contacts the fixed contact 431, and the trigger switch 400 activates the sensing signal.

[0092] When the controller receives the door opening signal, it controls the drive unit 110 to rotate forward. The output unit 230 drives the corresponding pusher 300 to move from the initial position to the extended position. The cam portion 2322 of the toothed plate 232 presses the roller 410, and the trigger spring 420 of the trigger switch 400 contacts the fixed contact 431, sending a sensing signal. When the pusher 300 moves to the extended position, the roller 410 is located in the second groove portion 2323b, and the trigger spring 420 of the trigger switch 400 separates from the fixed contact 431. It is considered that the pusher 300 has opened the door 1300. The controller then controls the drive unit 110 to rotate in reverse, and the output unit 230 drives the corresponding pusher 300 to move from the extended position to the initial position. During the movement, the cam portion 2322 of the toothed plate 232 presses the roller 410 again, and the trigger spring 420 of the trigger switch 400 contacts the fixed contact 431 again, sending a sensing signal. When the pusher 300 moves to its initial position, the roller 410 is located within the first groove 2323a. It is then assumed that the pusher 300 has returned to its original position, and the controller stops the drive 110 from rotating, thus completing the door opening. It should be noted that in actual operation, the user can send an opening signal via the actual buttons on the main body 1200, the control panel, or a mobile device.

[0093] In other embodiments, each output component 230 is provided with two trigger switches 400. When the pusher 300 is in the initial position, one trigger switch 400 is triggered, and when the pusher 300 is in the extended position, the other trigger switch 400 is triggered. This can also determine the position of the pusher 300, thereby controlling the rotation direction and start / stop timing of the drive component 100 according to the sensing signal.

[0094] During the entire door-opening process, after receiving the door-opening signal, the controller controls the drive component 110 to rotate forward. When the sensing signal disappears for the first time, the controller controls the drive component 110 to stop rotating and reverse. When the sensing signal disappears for the second time, the controller controls the drive component 110 to stop moving, and the push component 300 is in the initial position, completing one door-opening action. By utilizing the sliding engagement between the toothed plate 232 of the output component 230 and the trigger component, and determining the position of the push component by the disappearance times of the two sensing signals, the system occupies little space, has a clear control logic, optimizes the overall spatial layout, and reduces production costs.

[0095] In some embodiments, please refer to Figure 1 The door opening device 1100 also includes a housing 500 for mounting on the main body 1200. The drive assembly 100, transmission assembly 200, pusher 300, and start switch are all mounted inside the housing 500. The housing 500 has two through holes for the first pusher 300 and the second pusher 300 to extend out, respectively. The housing 500 provides a mounting base for each structure and also protects the drive assembly 100, transmission assembly 200, and pusher assembly. Furthermore, the various structures can be pre-installed inside the housing 500 to form a whole, facilitating the connection of the whole to the main body 1200.

[0096] When the pusher 300 is in the initial position, it can be completely retracted into the housing 500, or at least partially remaining outside the housing 500. During the movement of the pusher 300 from the initial position to the extended position, it extends out of the housing 500 through a through-hole. A second sliding structure is provided inside the housing 500, which cooperates with the first sliding structure on the push rod 310 to improve the stability of the pusher 300 during the switching process between the initial and extended positions.

[0097] Based on the same technical concept, this application also provides an electrical device 1000, which adopts a door opening device 1100. The specific structure of the door opening device 1100 is as described in the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0098] Electrical equipment 1000 can refer to household appliances such as refrigerators, dishwashers, or sterilizers.

[0099] Figure 17 A structural schematic diagram of the electrical equipment is shown, but only the main body 1200, the two doors 1300, and the door opening device 1100 are shown; other structures are not shown. Please refer to 17. The electrical equipment 1000 includes the main body 1200, the two doors 1300, and the door opening device 1100 according to any embodiment of the first aspect.

[0100] The two doors 1300 are designated as the first door 1301 and the second door 1302. The first door 1301 and the second door 1302 are movably positioned on the main body 1200, allowing the main body 1200 to be opened or closed. When the first door 1301 and / or the second door 1302 are open, the user can retrieve or place items inside the main body 1200. When the first door 1301 and the second door 1302 are closed, the items are stored inside the main body 1200. If the appliance 1000 is a refrigerator, it can preserve vegetables, fruits, medicines, and cosmetics, and freeze meat and seafood. If the appliance 1000 is a dishwasher, it can seal and isolate dishes, cups, and cookware for washing. If the appliance 1000 is a sterilizer, it can isolate dishes, cups, and other tableware inside for sterilization.

[0101] The door opening device 1100 is mounted on the main body 1200. Through the door opening device 1100, the pusher 300, during its movement from the initial position to the extended position, pushes the corresponding door body 1300 relative to the main body 1200 to open. That is, the two pushers 300 can open the first door body 1301 and the second door body 1302 respectively. When the pusher 300 corresponding to the first door body 1301 is in the initial position, the first door body 1301 is in the closed state; when the pusher 300 corresponding to the first door body 1301 is in the extended position, the first door body 1301 is in the open state. Similarly, when the pusher 300 corresponding to the second door body 1302 is in the initial position, the second door body 1302 is in the closed state; when the pusher 300 corresponding to the second door body 1302 is in the extended position, the second door body 1302 is in the open state.

[0102] In some embodiments, the door opening device 1100 can be installed on the top or bottom of the main body 1200, and the installation position is not limited. During installation, the housing 500 of the door opening device 1100 can be directly connected to the main body 1200 to achieve the connection between the door opening device 1100 and the main body 1200.

[0103] In some embodiments, multiple door opening devices 1100 are provided, such as two. These multiple door opening devices 1100 can be distributed along the height of the main body to increase the thrust when the door 1300 is opened, thereby improving the stability of the door 1300 opening. In other embodiments, the electrical appliance 1000, such as a refrigerator, can have four doors 1300: two upper doors 1300 arranged symmetrically left and right, and two lower doors 1300 arranged symmetrically at the bottom. Two door opening devices 1100 are provided, arranged along the height direction. The upper door opening device 1100 can open the two upper doors 1300, and the lower door opening device 1100 can open the two lower doors 1300, thereby achieving automatic opening of all four doors 1300 of the electrical appliance 1000.

[0104] The following section uses an electrical appliance 1000 as a refrigerator, which has a first door 1301 and a second door 1302. Taking the simultaneous opening and closing of the first door 1301 and the second door 1302 as an example, the entire opening process of the first door 1301 and the second door 1302 of the refrigerator will be described in detail.

[0105] Please see Figure 12 , Figure 14 as well as Figure 15 The first door 1301 and the second door 1302 of the refrigerator are in the closed state. Both pushers 300 are in the initial position. The roller 410 of the trigger switch 400 is located in the first groove 2323a. The drive member 110 rotates forward, driving the corresponding pusher 300 to extend outward through the first transmission member 220a and the first output member 230a. The shock absorber 330 pushes the first door 1301 outward. The corresponding pusher 300 is driven to extend outward through the second transmission member 220b and the second output member 230b. The shock absorber 330 pushes the second door 1302 outward. The trigger switch 400 is triggered by the cam 2322. The large pushing force overcomes the negative pressure and magnetic force, and the first door 1301 and the second door 1302 open. The pushing force gradually decreases and the pushing speed gradually increases. The first door 1301 and the second door 1302 open at a large angle under the action of the corresponding pusher 300 and inertia. When the two pushers 300 move to the extended position, the roller 410 of the trigger switch 400 is located in the second groove 2323b and the trigger is released. The drive member 110 stops rotating and then reverses, causing the two pushers 300 to retract in the opposite direction. The trigger switch 400 is then pressed by the cam 2322 and triggered again until the two pushers move to the initial position. The roller 410 of the trigger switch 400 is located in the first groove 2323a and contacts the trigger, and the drive member 110 stops working.

[0106] The door opening device 1100 provided in this application has at least the following advantages:

[0107] (1) The automatic opening of two doors 1300 can be achieved by a drive component 100, which reduces the number of parts, lowers the cost and manufacturing difficulty.

[0108] (2) During the process of the pusher 300 moving from the initial position to the extended position, the speed ratio between the transmission component 220 and the output component 230 tends to decrease, which makes the pusher 300 have a large initial pushing force, which can overcome the magnetic force and negative pressure, and stably open the door 1300, thus improving the problem of difficulty in opening the door and increasing the convenience and efficiency of opening the door.

[0109] (3) During the process of the pusher 300 moving from the initial position to the extended position, the speed ratio between the transmission component 220 and the output component 230 tends to decrease, which makes the extension speed of the pusher 300 increase from small to large, and can continuously do work on the door 1300, which is conducive to realizing the large angle opening of the door 1300, improving the ease of operation and improving the user experience.

[0110] (4) By setting the reversing gear 210, the rotation directions of the two transmission components 220 are opposite, and the rotation directions of the two output components 230 are opposite. Therefore, the two push components 300 can extend and retract at the same time, realizing the simultaneous opening of the two doors 1300, improving the opening efficiency, reducing the user's waiting time, and improving the user's experience.

[0111] (5) Both the transmission component 220 and the output component 230 include an eccentrically arranged non-circular gear portion 221 to ensure that the speed ratio between the transmission component 220 and the output component 230 decreases during the process of the pusher 300 moving from the initial position to the extended position. At the same time, a counterweight 240 is provided on the transmission component 220 and the output component 230 to ensure that the center of mass of the transmission component 220 and the output component 230 is close to the rotation center, thereby improving the rotational stability of the output component 230 and the transmission component 220, reducing noise during operation, improving transmission efficiency, and enhancing the user experience.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0113] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0114] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations 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 device for opening two doors mounted on a main body, characterized in that, include: Two pushers are provided on the main body for opening the two doors respectively; The transmission assembly includes two transmission components and two output components. The output components are dynamically coupled to the corresponding transmission components and the corresponding push components to drive the corresponding push components to switch between an initial position and an extended position. A drive assembly is located on the main body and is dynamically coupled to both of the transmission components; During the process of the pusher moving from the initial position to the extended position, the speed ratio between the transmission member and the output member tends to decrease.

2. The door opening device according to claim 1, characterized in that, During the process of the pusher moving from the initial position to the extended position, the distance between the power coupling point of the transmission member and the output member and the rotation center of the transmission member tends to increase.

3. The door opening device according to claim 1, characterized in that, It also includes two trigger switches; the output member has a trigger surface extending circumferentially; as the output member drives the push member to move between the initial position and the extended position, the trigger switch is triggered through the trigger surface.

4. The door opening device according to any one of claims 1-3, characterized in that, Both the transmission component and the output component include an eccentrically arranged non-circular gear portion, the teeth of which are distributed along a helical line.

5. The door opening device according to claim 4, characterized in that, Both the transmission component and the output component are equipped with counterweights for adjusting the center of gravity.

6. The door opening device according to claim 5, characterized in that, The non-circular gear portion of the transmission component includes a rotating portion and a meshing portion located outside the rotating portion; the counterweight is located in the rotating portion, and its radial dimension is at its maximum at opposite sides of the rotation center of the transmission component.

7. The door opening device according to claim 5, characterized in that, The output component also includes a toothed plate coaxially arranged with the non-circular gear portion; the counterweight is located on the toothed plate and is distributed on opposite sides of the rotation center of the output component at the point where the radial dimension of the non-circular gear portion is at its maximum.

8. The door opening device according to claim 5, characterized in that, Both the transmission component and the output component are provided with at least one groove, and the counterweight is embedded in the groove.

9. The door opening device according to claim 5, characterized in that, The counterweight has a fan-shaped outline, and the center of the fan-shaped outline is on the same side as the rotation center of the transmission component or the output component.

10. An electrical appliance, characterized in that, The device includes a main body, two doors movably disposed on the main body, and an opening device as described in any one of claims 1 to 9 mounted on the main body, wherein the pusher pushes the corresponding door to open relative to the main body during the process of moving from the initial position to the extended position.

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