Automatic door opening mechanism and household appliance

Abstract

The application discloses an automatic door opening mechanism and a household appliance. The automatic door opening mechanism comprises a driving mechanism, a telescopic assembly, a rolling assembly and a movement track. The telescopic assembly is connected with the driving mechanism. The rolling assembly is rotationally connected with one end of the telescopic assembly away from the driving mechanism. The movement track is connected with the rolling assembly. The automatic door opening mechanism comprises at least a first stage and a second stage. In the first stage, the rolling assembly moves along the movement track. The rolling assembly has at least a first direction force and acts on the door body to open the door body relative to the cabinet. The first direction is perpendicular to the door body. In the second stage, the rolling assembly continues to move along the movement track. The rolling assembly rolls on the door body to expand the door opening angle between the door body and the cabinet. The automatic door opening mechanism can not only reduce energy loss, but also reduce noise. Meanwhile, the angle between the door body and the cabinet can be continuously increased, and the door opening time can be reduced.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to an automatic door opening mechanism and a household appliance. Background Technology

[0002] Some existing household appliances use automatic door opening mechanisms to achieve automatic door opening. For example, an automatic door opening mechanism includes a push rod that perpendicularly pushes against the door surface to open the door automatically. However, during the process of the push rod hitting the door, both the door-opening and door-breaking phases occur in the same direction. This not only requires the push rod to use considerable force to impact the door, resulting in significant noise, but also leads to a small opening angle and a long opening time during the door-opening phase. Summary of the Invention

[0003] This application provides an automatic door opening mechanism and a household appliance to solve the technical problems in existing household appliances where the door opening and door breaking stages are both in the same direction during the process of the push rod pushing the door, which not only requires the push rod to use a large force to hit the door, resulting in a lot of noise, but also results in a small opening angle and a long opening time during the door opening stage.

[0004] To address the aforementioned technical problems, this application proposes an automatic door opening mechanism, comprising: a drive mechanism; a telescopic component connected to the drive mechanism; a rolling component rotatably connected to the end of the telescopic component away from the drive mechanism; and a motion track connected to the rolling component. The drive mechanism drives the telescopic component to move the rolling component along the motion track. The automatic door opening mechanism includes at least a first stage and a second stage. In the first stage, the rolling component moves along the motion track, and the rolling component exerts a force in at least a first direction on the door body, causing the door body to open relative to the housing. The first direction is perpendicular to the door body. In the second stage, the rolling component continues to move along the motion track, rolling against the door body to widen the opening angle between the door body and the housing.

[0005] The motion track includes a first motion track, which extends along a second direction. The rolling component moves along the first motion track and rolls on the door body. The second direction is perpendicular to the first direction.

[0006] The formula for the angle between the rolling component's movement path along the second direction and the door body is: Where r is the radius of motion of the rolling component; s is the total displacement of the rolling component along the second direction; n is the number of unit distances the rolling component moves; and L is the unit distance the rolling component moves along the second direction.

[0007] The motion track includes a second motion track, which extends along the first direction, and the rolling component moves along the second motion track and acts on the door body.

[0008] The automatic door opening mechanism also includes a third stage, in which the end of the rolling component connected to the telescopic component and the end of the telescopic component away from the drive mechanism are vertically arranged, wherein the rolling component is located at the end of the second motion track away from the door body.

[0009] The motion track includes a transition track, which connects the second motion track and the first motion track. The arc angle of the transition track is 90°.

[0010] The rolling assembly includes a roller, a first roller fixing part, and a second roller fixing part. The first roller fixing part and the second roller fixing part are arranged opposite each other along a third direction. The roller rolls between the first roller fixing part and the second roller fixing part. The second roller fixing part moves along a motion track. The end of the telescopic assembly away from the drive mechanism is rotatably connected between the first roller fixing part and the second roller fixing part.

[0011] The telescopic assembly includes at least a first telescopic rod and a second telescopic rod, the second telescopic rod extending and retracting within the first telescopic rod, the first telescopic rod being connected to a drive mechanism, and the second telescopic rod being rotatably connected to a rolling assembly; and / or, the drive mechanism includes a drive assembly and a gear assembly, the drive assembly driving the gear assembly to rotate, and the gear assembly being connected to one end of the telescopic assembly.

[0012] The automatic door opening mechanism includes a first limit switch and a second limit switch. The first limit switch is releasably abutted against the outer periphery of the rolling assembly; the second limit switch is releasably abutted against the outer periphery of the rolling assembly.

[0013] To solve the above-mentioned technical problems, this application proposes a household appliance, including: a cabinet; a door rotatably connected to the cabinet; and the aforementioned automatic door opening mechanism disposed in the cabinet, the automatic door opening mechanism acting on the door to open the door relative to the cabinet.

[0014] This application's automatic door opening mechanism includes a drive mechanism, a telescopic component, a rolling component, and a motion track. The telescopic component is connected to the drive mechanism. The rolling component is rotatably connected to the end of the telescopic component away from the drive mechanism. The motion track is connected to the rolling component. The drive mechanism drives the telescopic component, causing the rolling component to move along the motion track. The automatic door opening mechanism includes at least a first stage and a second stage. In the first stage, the rolling component moves along the motion track, and the rolling component exerts a force in at least a first direction on the door body, causing the door body to open relative to the housing. The first direction is perpendicular to the door body. In the second stage, the rolling component continues to move along the motion track, rolling against the door body to widen the opening angle between the door body and the housing.

[0015] First, the automatic door opening is achieved through the coordinated operation of the aforementioned drive mechanism, telescopic component, rolling component, and motion track. Second, in the first stage of the automatic door opening mechanism, the rolling component acts on the door in the first direction, resulting in rolling friction between the rolling component and the door, which reduces both energy loss and noise. Then, in the second stage, the rolling component rolls over the door, again resulting in rolling friction between the rolling component and the door, further reducing energy consumption and noise. Finally, the rolling component exerts a force on the door in at least the first direction before rolling over it, meaning it has two different directions of movement. This allows the automatic door opening mechanism to break the door seal without requiring significant power during the opening phase, further reducing energy loss and noise. Additionally, in the second stage, the continuous rolling of the rolling component over the door increases the angle between the door and the enclosure, reducing opening time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is an exploded view of an embodiment of the automatic door opening mechanism of this application;

[0018] Figure 2 This is a schematic diagram of the structure of an embodiment of the automatic door opening mechanism of this application in the first stage;

[0019] Figure 3 This is a schematic diagram of the second stage of an embodiment of the automatic door opening mechanism of this application;

[0020] Figure 4 This is a simplified diagram of an embodiment of the automatic door opening mechanism of this application in its second stage;

[0021] Figure 5 This is a schematic diagram of the structure of the housing in one embodiment of the automatic door opening mechanism of this application;

[0022] Figure 6 This is a schematic diagram of the third stage of an embodiment of the automatic door opening mechanism of this application;

[0023] Figure 7 This is a partial exploded view of an embodiment of the automatic door opening mechanism of this application.

[0024] Reference numerals: 10. Automatic door opening mechanism; 11. Drive mechanism; 111. Drive assembly; 1111. Drive motor; 1112. Drive worm; 112. Gear assembly; 1121. First gear; 1121a. First sub-gear section; 1121b. Second sub-gear section; 1122. Second gear; 1122a. Third sub-gear section; 1122b. Fourth sub-gear section; 1123. Transmission gear; 12. Telescopic assembly; 121. First telescopic rod; 122. Second telescopic rod; 1221. Sleeve part; 13. Rolling assembly Components; 131, Roller; 132, First Roller Fixing Part; 133, Second Roller Fixing Part; 134, First Connecting Shaft; 135, Second Connecting Shaft; 14, Movement Track; 141, First Movement Track; 142, Second Movement Track; 143, Transition Track; 144, Sub-Motion Track; 151, First Limit Switch Component; 152, Second Limit Switch Component; 16, Limiting Part; 17, Mounting Housing; 17a, First Mounting End; 17b, Second Mounting End; 17c, Third Mounting End; 17d, Fourth Mounting End; 21, Door Body. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] The automatic door opening mechanism and household appliances provided by the present invention will be described in detail below with reference to embodiments.

[0028] Please see Figure 1 , Figure 2 as well as Figure 3 , Figure 1 This is an exploded view of an embodiment of the automatic door opening mechanism of this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the automatic door opening mechanism of this application in the first stage; Figure 3This is a schematic diagram of the second stage of an embodiment of the automatic door opening mechanism of this application. This application provides an automatic door opening mechanism. The automatic door opening mechanism 10 can be installed on a household appliance (not shown in the figure). The automatic door opening mechanism 10 includes a drive mechanism 11, a telescopic component 12, a rolling component 13, and a motion track 14. The drive mechanism 11 provides driving force. The drive mechanism 11 can be, but is not limited to, gear transmission and rotary transmission. The telescopic component 12 is connected to the drive mechanism 11, that is, the drive mechanism 11 drives the telescopic component 12 to move. The telescopic component 12 can extend or retract, etc. The telescopic component 12 can be, but is not limited to, a telescopic rod. The telescopic component 12 is detachably or fixedly connected to the drive mechanism 11. The rolling component 13 is rotatably connected to the end of the telescopic component 12 away from the drive mechanism 11. The rolling component 13 can roll relative to the telescopic component 12. During the movement of the telescopic component 12 driving the rolling component 13, the length of the telescopic component 12 can change with different movement states of the rolling component 13. The motion track 14 is connected to the rolling component 13. The motion track 14 provides a motion path for the rolling component 13, making its movement smoother and more accurate. The drive mechanism 11 drives the telescopic component 12, which in turn drives the rolling component 13 to move along the motion track 14, so that the rolling component 13 acts on the door body 21.

[0029] The aforementioned automatic door opening mechanism 10 includes at least a first stage and a second stage. For example... Figure 2 As shown, when the automatic door opening mechanism 10 is in the first stage, the rolling component 13 moves along the motion track 14. The rolling component 13 is subjected to a force in at least the first direction X. Under the action of the first direction X, the rolling component 13 acts on the door body 21, causing the door body 21 to open relative to the housing (not shown in the figure). The first direction X is perpendicular to the door body 21. The first direction X is not limited to the front-back direction; that is, the front-back direction is perpendicular to the door body 21. The first stage can be a door seal breaking stage. The door seal breaking stage breaks the connection between the door body 21 and the housing. If the door body 21 and the housing are connected by a door seal strip and a magnetic connector, the door seal breaking stage can break the connection between the door seal strip and the magnetic connector, creating a gap between the door body 21 and the housing.

[0030] like Figure 3 As shown, when the automatic door opening mechanism 10 is in the second stage, the rolling assembly 13 continues to move along the motion track 14. The rolling assembly 13 rolls against the door body 21 to increase the opening angle between the door body 21 and the housing. The second stage can be the door opening stage.

[0031] First, the automatic opening of the door 21 is achieved through the coordinated operation of the aforementioned drive mechanism 11, telescopic component 12, rolling component 13, and motion track 14. Second, when the automatic opening mechanism 10 is in the first stage, the rolling component 13 acts on the door 21 along the first direction X, resulting in rolling friction between the rolling component 13 and the door 21, which reduces both energy consumption and noise. Then, when the automatic opening mechanism 10 is in the second stage, the rolling component 13 rolls on the door 21, resulting in rolling friction between the rolling component 13 and the door 21, which also reduces energy consumption and noise. Finally, the rolling component 13 exerts a force in at least the first direction X on the door 21, and then rolls on the door 21. This means the rolling component 13 has two different directions of movement, allowing the automatic opening mechanism 10 to open the door simply by breaking the door seal, without requiring significant power during the opening phase, further reducing energy consumption and noise. In addition, during the second stage, the rolling component 13 continuously rolls over the door 21, which continuously increases the angle between the door 21 and the box, reducing the opening time.

[0032] Please see Figure 4 and Figure 5 , Figure 4 This is a simplified diagram of an embodiment of the automatic door opening mechanism of this application in its second stage; Figure 5 This is a schematic diagram of the mounting housing structure in one embodiment of the automatic door opening mechanism of this application. (In conjunction with...) Figures 1 to 3 In some embodiments, the motion track 14 includes a first motion track 141. The first motion track 141 extends along a second direction Y. The second direction Y can be, but is not limited to, the left-right direction. The first motion track 141 extends along the left-right direction. The rolling component 13 moves along the first motion track 141 and rolls on the door body 21. That is, the rolling component 13 moves along the second direction Y and rolls on the door body 21 along the second direction Y. The second direction Y is perpendicular to the first direction X. The front-back direction and the left-right direction are perpendicular.

[0033] When the automatic door opening mechanism 10 is in the second stage, the rolling component 13 moves along the second direction Y. For every unit distance the rolling component 13 moves, the opening angle of the door body 21 gradually increases, thus satisfying the requirement that the opening speed is slow at first and then fast, gradually increasing the opening angle and reducing the opening time. In addition, the second motion track 142 extends along the second direction Y, avoiding the presence of a component force on the rolling component 13, which can reduce the overall size of the automatic door opening mechanism 10 and make the overall structure of the automatic door opening mechanism 10 more compact.

[0034] When the automatic door opening mechanism 10 is in the second stage, the rolling component 13 moves along the first motion track 141 and rolls on the door body 21. At this time, the angle between the rolling component 13 and the door body 21 along the second direction Y motion path gradually increases. Let θ be the angle between the rolling component 13 and the door body 21 along the second direction Y motion path. Let L be the unit distance the rolling component 13 moves along the second direction Y. Let r be the radius of motion of the rolling component 13. Let s be the total displacement of the rolling component 13 along the second direction Y. Let n be the number of unit distances the rolling component 13 moves. The formula for the angle between the rolling component 13 and the door body 21 along the second direction Y motion path is as follows.

[0035] Taking the derivative of f(x) twice, Where f(x) is greater than 0.

[0036] Since (s-nL)>0 in the above formula is an increasing function, Δsinθ increases with the increase of θ. Adding the range from 0 to 90 degrees, due to the relationship between θ and sinθ, we can see that Δθ also increases with the increase of n. Therefore, based on the above f(x) formula and the curve of the sine function sinθ from 0 to 90 degrees, we can use differentiation to know that the change Δθ increases with the increase of n.

[0037] That is, for every unit distance the rolling component 13 moves along the second direction, the opening angle increases, meaning the opening speed gradually increases, which conforms to the characteristics of automatic door opening. The characteristic of automatic door opening is that during the door seal breaking stage, the rolling component 13 needs to output a relatively large force to push against the door body 21. At this time, the speed does not need to be very high, but the force must be large. As the door seal is broken, because the door body 21 is relatively heavy and has a large inertia, the opening speed of the door body 21 will increase after being subjected to force. Therefore, the rolling component 13 also has the ability to increase the opening speed to contact the door and continue to apply force, so that the speed of the door body 21 can be further increased.

[0038] Therefore, the above-mentioned limitations can meet the requirement of opening speed being slow at first and then fast, gradually increasing the opening angle and reducing the opening time. During the opening process of the door 21, the rolling component 13 always acts on the door 21 along the second direction Y, maintaining power output.

[0039] In some embodiments, the motion track 14 includes a second motion track 142. The second motion track 142 extends along a first direction X. Specifically, the second motion track 142 extends in a front-to-back direction. The rolling assembly 13 moves along the second motion track 142 and acts on the door body 21. That is, the rolling assembly 13 moves along the first direction X and acts directly on the door body 21 in the first direction X. All the force exerted by the rolling assembly 13 is in the first direction X, resulting in high force utilization efficiency. Through the cooperation of the second motion track 142 and the rolling assembly 13, all the force is applied to the door body 21, increasing the force utilization efficiency and facilitating faster breaking of the door seal. While ensuring efficient force utilization, it is not necessary to use greater force to break the door seal, thereby further reducing noise.

[0040] For example, suppose the force exerted by the rolling component 13 is a first preset value. The force exerted by the rolling component 13 along the first direction X is only a second preset value, which is less than the first preset value. The second preset value of the rolling component 13 is sufficient to break the door seal. When the entire force of the rolling component 13 is along the first direction X and is the second preset value, the door seal can be broken, maximizing the utilization of force. That is, the rolling component 13 can break the door seal without using a larger force, thereby reducing noise, etc.

[0041] Please see Figure 6 , Figure 6 This is a structural schematic diagram of an embodiment of the automatic door opening mechanism of this application at its third stage. (Combined with...) Figures 1 to 5 In some embodiments, the automatic door opening mechanism 10 further includes a third stage. The third stage can be an initial stage, i.e., the automatic door opening mechanism 10 is in a non-moving state. When the automatic door opening mechanism 10 is in the third stage, the end of the rolling component 13 connected to the telescopic component 12 and the end of the telescopic component 12 away from the drive mechanism 11 are perpendicular. The rolling component 13 is located at the end of the second motion track 142 away from the door body 21. By limiting the perpendicular arrangement between one end of the rolling component 13 and one end of the telescopic component 12 in the third stage, the telescopic component 12 acts on the rolling component 13, which not only ensures that all the torque applied by the rolling component 13 is applied to the door body 21, reducing energy consumption, but also facilitates faster door seal breaking, thereby shortening the door seal breaking time.

[0042] In some embodiments, the motion track 14 includes a transition track 143. The transition track 143 is connected to the second motion track 142 and the first motion track 141. The transition track 143 is arc-shaped. One end of the transition track 143 is detachably or fixedly connected to one end of the second motion track 142. In this embodiment, one end of the transition track 143 is fixed or welded to one end of the second motion track 142. The other end of the transition track 143 is detachably or fixedly connected to one end of the first motion track 141. In this embodiment, the other end of the transition track 143 is fixed or welded to one end of the first motion track 141. The arc angle corresponding to the transition track 143 is 90°. The transition track 143 serves as a transition, allowing the rolling assembly 13 to move along the second motion track 142 and transition to the first motion track 141.

[0043] By cooperating with the first motion track 141, the transition track 143, and the second motion track 142, it is possible not only to ensure that the automatic door opening mechanism 10 has at least two different directions of movement, so that the automatic door opening mechanism 10 includes at least a first stage and a second stage in at least different directions; but also the transition track 143 has a connecting function, so that the first stage can smoothly transition to the second stage, and can ensure that after the first stage is achieved, the rolling component 13 always rolls on the door body 21, continuously increasing the opening angle; at the same time, it can also improve the smoothness of the movement of the rolling component 13.

[0044] Please see Figure 7 , Figure 7 This is a partially exploded view of an embodiment of the automatic door opening mechanism of this application. (In conjunction with...) Figures 1 to 6 In some embodiments, the rolling assembly 13 includes a roller 131, a first roller fixing part 132, and a second roller fixing part 133. The first roller fixing part 132 and the second roller fixing part 133 are arranged opposite each other along a third direction. This third direction can be, but is not limited to, the vertical direction. The third direction can be perpendicular to the first direction X and the second direction Y, respectively. The first roller fixing part 132 is located above the second roller 131. The roller 131 rolls between the first roller fixing part 132 and the second roller fixing part 133. That is, the roller 131 is rotatably connected relative to the first roller fixing part 132 and the second roller 133. When the roller 131 rotates, it rolls and acts on the door body 21. The second roller fixing part 133 moves along the motion track 14. The end of the telescopic assembly 12 away from the drive mechanism 11 is rotatably connected between the first roller fixing part 132 and the second roller fixing part 133.

[0045] The rolling assembly 13 includes the aforementioned roller 131, a first roller fixing part 132, and a second roller fixing part 133. It not only enables the roller 131 to roll but also improves the stability of the roller 131's installation. Furthermore, the roller 131, the first roller fixing part 132, and the second roller fixing part 133, together with the aforementioned telescopic assembly 12 and the motion track 14, enhance the stability of the rolling assembly 13's movement.

[0046] In one specific embodiment, the rolling assembly 13 includes a first connecting shaft 134. The first connecting shaft 134 is connected between one end of the first roller fixing part 132 and one end of the second roller fixing part 133. One end of the first connecting shaft 134 is detachably or fixed to the end of the first roller fixing part 132 facing the second roller fixing part 133. The other end of the first connecting shaft 134 is detachably or fixed to the end of the second roller fixing part 133 facing the first roller fixing part 132. The roller 131 is sleeved on the first connecting shaft 134 between the first roller fixing part 132 and the second roller fixing part 133, allowing the roller 131 to rotate relative to the first connecting shaft 134. The connection between the first connecting shaft 134 and the roller 131 facilitates the rotation of the roller 131, thereby creating rolling friction between the roller 131 and the door body 21.

[0047] In one specific embodiment, the rolling assembly 13 includes a second connecting shaft 135. The second connecting shaft 135 is connected between the other end of the first roller fixing part 132 and the other end of the second roller fixing part 133. One end of the second connecting shaft 135 is detachably or fixed to the end of the first roller fixing part 132 facing the second roller fixing part 133. The other end of the second connecting shaft 135 is detachably or fixed to the end of the second roller fixing part 133 facing the first roller fixing part 132. The telescopic assembly 12 is sleeved on the second connecting shaft 135 between the first roller fixing part 132 and the second roller fixing part 133, allowing the telescopic assembly 12 to rotate relative to the rolling assembly 13. The connection between the second connecting shaft 135 and the telescopic assembly 12 facilitates relative rotation between the rolling assembly 13 and the telescopic assembly 12, making the length of the telescopic assembly 12 adjustable.

[0048] In one specific embodiment, the motion track 14 includes at least one sub-motion track 144. The number of sub-motion tracks 144 may be, but is not limited to, one, two, or more than three. As in this embodiment, the motion track 14 includes two sub-motion tracks 144. The bottom of the second roller fixing part 133 is provided with at least one sub-rolling groove (not shown in the figure). The number of sub-rolling grooves may be, but is not limited to, one, two, or more than three. As in this embodiment, the bottom of the second roller fixing part 133 is provided with two sub-rolling grooves. The sub-motion track 144 is embedded in the sub-rolling groove, which improves the stability and smoothness of the movement of the second roller fixing part 133 along the motion track 14 and reduces frictional resistance, etc.

[0049] In some embodiments, the telescopic assembly 12 includes at least a first telescopic rod 121 and a second telescopic rod 122. The second telescopic rod 122 extends and retracts within the first telescopic rod 121. When the second telescopic rod 122 extends relative to the first telescopic rod 121, the overall length of the telescopic assembly 12 increases. When the second telescopic rod 122 is at least partially retracted into the first telescopic rod 121, the overall length of the telescopic assembly 12 shortens. The first telescopic rod 121 is connected to the drive mechanism 11. The end of the first telescopic rod 121 away from the second telescopic rod 122 is detachably or fixedly connected to the drive mechanism 11. The second telescopic rod 122 is rotatably connected to the rolling assembly 13.

[0050] The telescopic assembly 12 includes at least a first telescopic rod 121 and a second telescopic rod 122, and has a simple structure that is easy to install. Through the cooperation of the first telescopic rod 121, the second telescopic rod 122, the drive mechanism 11, and the rolling assembly 13, the telescopic assembly 12 can provide different distance compensations at different stages.

[0051] Specifically, the end of the second telescopic rod 122 away from the first telescopic rod 121 is provided with a sleeve portion 1221. The second roller fixing portion 133 in the rolling assembly 13 is provided with a second connecting shaft 135. The sleeve portion 1221 is sleeved on the second connecting shaft 135 to realize the rolling connection between the telescopic assembly 12 and the rolling assembly 13.

[0052] Please continue reading. Figures 1 to 7 In some embodiments, the drive mechanism 11 includes a drive assembly 111 and a gear assembly 112. The drive assembly 111 provides driving force. The gear assembly 112 transmits the driving force. The drive assembly 111 drives the gear assembly 112 to rotate. The gear assembly 112 is connected to one end of the telescopic assembly 12. The drive assembly 111 drives the gear assembly 112 to move, the gear assembly 112 drives the telescopic assembly 12 to move, and then the telescopic assembly 12 drives the rolling assembly 13 to move along the motion track 14, thereby realizing automatic door opening, etc.

[0053] In one specific embodiment, the drive assembly 111 includes a drive motor 1111 and a drive worm gear 1112. The drive worm gear 1112 is connected to the drive shaft of the drive motor 1111. The drive motor 1111 can drive the drive worm gear 1112 to rotate in the forward or reverse direction.

[0054] In one specific embodiment, the gear assembly 112 includes a gear set (not shown in the figure) and a transmission gear 1123. The drive assembly 111 meshes with the gear set. Specifically, the drive worm 1112 of the drive assembly 111 meshes with the gear assembly 112, causing the drive worm 1112 to drive the gear set to rotate. The gear set meshes with the transmission gear 1123. The gear set drives the transmission gear 1123 to rotate. The transmission gear 1123 is connected to the telescopic assembly 12. The transmission gear 1123 drives the telescopic assembly 12 to move.

[0055] Specifically, the aforementioned gear set includes at least a first gear 1121 and a second gear 1122. The first gear 1121 includes a first sub-gear portion 1121a and a second sub-gear portion 1121b. The first sub-gear portion 1121a is located above the second sub-gear portion 1121b. The drive worm gear 1112 of the drive assembly 111 meshes with the second sub-gear portion 1121b. The second gear 1122 includes a third sub-gear portion 1122a and a fourth sub-gear portion 1122b. The third sub-gear portion 1122a is located above the fourth sub-gear portion 1122b. The first sub-gear portion 1121a and the third sub-gear portion 1122a mesh. The fourth sub-gear portion 1122b meshes with the transmission gear 1123. The first telescopic rod 121 of the telescopic assembly 12 is centrally connected to the transmission gear 1123. The first gear 1121, the second gear 1122, and the transmission gear 1123 work together to transmit the driving force of the drive assembly 111 from the gear assembly 112 to the telescopic assembly 12.

[0056] In some embodiments, the automatic door opening mechanism 10 includes a limiting portion 16. The limiting portion 16 is disposed at one end of the second motion track 142 away from the transition track 143. The limiting portion 16 serves to limit the initial position of the rolling assembly 13.

[0057] In some embodiments, the automatic door opening mechanism 10 further includes a fourth stage. The fourth stage may be a retraction stage. That is, under the reaction force of the drive mechanism 11, the rolling component 13 and the telescopic component 12 return to the third stage or the initial stage along the motion track 14.

[0058] The automatic door opening mechanism 10 includes a first limit switch 151 and a second limit switch 152. The outer periphery of the rolling assembly 13 is releasably abutted against the first limit switch 151. Specifically, the outer periphery of the rolling assembly 13 abuts against the first limit switch 151; or, the outer periphery of the rolling assembly 13 is disengaged from the first limit switch 151. The outer periphery of the rolling assembly 13 is also releasably abutted against the second limit switch 152. Specifically, the outer periphery of the rolling assembly 13 abuts against the second limit switch 152; or, the outer periphery of the rolling assembly 13 is disengaged from the second limit switch 152.

[0059] When the outer periphery of the rolling assembly 13 disengages from the first limit switch 151, the drive mechanism 11 begins to rotate forward. The drive mechanism 11 drives the telescopic assembly 12 to move the rolling assembly 13 forward along the motion track 14, thus achieving automatic door opening. The rolling assembly 13 stops moving when it comes into contact with the second limit switch 152. Then, the drive mechanism 11 rotates in the reverse direction, driving the telescopic assembly 12 to move the rolling assembly 13 in the reverse direction along the motion track 14. The drive mechanism 11 stops operating when the rolling assembly 13 comes into contact with the first limit switch 151.

[0060] The aforementioned drive mechanism 11, telescopic component 12, rolling component 13, and motion track 14 can be directly mounted on the household appliance or indirectly mounted on it. In one specific embodiment, the automatic door opening mechanism 10 also includes a mounting housing 17. The drive mechanism 11, telescopic component 12, rolling component 13, and motion track 14 are all mounted on the mounting housing 17. The mounting housing 17 is disposed on the household appliance. For example, the mounting housing 17 can be detachably or fixedly connected to the top of the household appliance or other locations. The mounting housing 17 not only provides mounting positions for the drive mechanism 11, telescopic component 12, rolling component 13, and motion track 14, but also improves the installation efficiency of the automatic door opening mechanism 10 on the household appliance.

[0061] Specifically, the mounting housing 17 includes a first mounting end 17a, a second mounting end 17b, a third mounting end 17c, and a fourth mounting end 17d. The first mounting end 17a and the second mounting end 17b are arranged opposite each other along a first direction X. The third mounting end 17c and the fourth mounting end 17d are arranged opposite each other along a second direction Y. The first mounting end 17a is close to the door body 21. An installation space (not shown in the figure) is formed between the motion track 14, the second mounting end 17b, and the fourth mounting end 17d. The drive mechanism 11 and the telescopic assembly 12 are disposed in the installation space.

[0062] Please continue reading. Figures 1 to 7 In a specific application scenario, the automatic door opening mechanism 10 includes at least a third stage, a first stage, a second stage, and a fourth stage. The third stage can be the initial stage; the first stage can be the door-breaking stage; the second stage can be the door-opening stage; and the fourth stage can be the retraction stage.

[0063] When the automatic door opening mechanism 10 is in the initial stage, the rolling component 13 is vertically arranged on the door body 21 along the first direction X, and the end of the rolling component 13 connected to the telescopic component 12 is vertically arranged between the end of the telescopic component 12 away from the drive mechanism 11.

[0064] When the automatic door opening mechanism 10 is in the door-breaking stage, the drive mechanism 11 drives the telescopic component 12 to move. Because the rolling component 13 is perpendicular to the telescopic component 12, the torque generated by the telescopic component 12 will be entirely along the door-breaking direction. The door-breaking stage is the stage where opening the door requires the most energy, and the energy utilization rate is high. The telescopic component 12 drives the rolling component 13 to move along the motion track 14 to realize the door-breaking stage. During this door-breaking stage, the distance between the axis of the telescopic component 12 and the rolling component 13 will change, and the telescopic component 12 will automatically compensate for the distance.

[0065] The automatic door opening mechanism 10 is in the door opening stage. After the door seal is broken, the rolling component 13 moves along the motion track 14. Through the movement in the second direction Y, the door body 21 is driven to continuously increase in angle, achieving the effect of opening the door, until it touches the second limit switch component 152, and the movement stops.

[0066] The automatic door opening mechanism 10 is in the retraction phase. After contacting the second limit switch 152, the drive mechanism 11 stops and rotates in the reverse direction. Driven by the telescopic component 12, the rolling assembly 13 returns to its initial position along the motion track 14. After the rolling assembly 13 contacts the first limit switch 151, the drive mechanism 11 stops operating.

[0067] Please continue reading. Figures 1 to 7 This application provides a household appliance. The household appliance may include, but is not limited to, refrigerators and freezers. The household appliance includes a cabinet, a door 21, and an automatic door opening mechanism 10. The door 21 is rotatably connected to the cabinet. The door 21 can be opened or closed relative to the cabinet. The automatic door opening mechanism 10 is disposed in the cabinet. The automatic door opening mechanism 10 can act on the door 21 to automatically open the door 21 relative to the cabinet. It should be noted that the automatic door opening mechanism 10 in this embodiment is the same as the automatic door opening mechanism 10 described in the above embodiments.

[0068] The household appliance, through the aforementioned automatic door opening mechanism 10, can not only open the door automatically, but also reduce energy consumption and noise; at the same time, it can continuously increase the angle between the door 21 and the cabinet, reducing the opening time.

[0069] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications will change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0070] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An automatic door opening mechanism, characterized in that, include: Drive mechanism; A telescopic component is connected to the drive mechanism; A rolling component is rotatably connected to the end of the telescopic component away from the drive mechanism; A motion track is connected to the rolling component, and the drive mechanism drives the telescopic component to move the rolling component along the motion track; The automatic door opening mechanism includes at least a first stage and a second stage; in the first stage, the rolling component moves along the motion track, and the rolling component has a force in at least a first direction and acts on the door body to open the door body relative to the box body, wherein the first direction is perpendicular to the door body; In the second stage, the rolling assembly continues to move along the motion track, and the rolling assembly rolls on the door body to widen the opening angle between the door body and the box body.

2. The automatic door opening mechanism according to claim 1, characterized in that, The motion track includes a first motion track, which extends along a second direction. The rolling component moves along the first motion track and rolls on the door body. The second direction is perpendicular to the first direction.

3. The automatic door opening mechanism according to claim 2, characterized in that, The formula for the angle between the rolling component's movement path along the second direction and the door body is: Where r is the radius of motion of the rolling component; s is the total displacement of the rolling component along the second direction; n is the number of unit distances the rolling component moves; and L is the unit distance the rolling component moves along the second direction.

4. The automatic door opening mechanism according to claim 2, characterized in that, The motion track includes a second motion track, which extends along the first direction, and the rolling component moves along the second motion track and acts on the door body.

5. The automatic door opening mechanism according to claim 4, characterized in that, The automatic door opening mechanism further includes a third stage, in which the end of the rolling component connected to the telescopic component is vertically arranged between the end of the telescopic component and the end of the telescopic component away from the drive mechanism, wherein the rolling component is located at the end of the second motion track away from the door body.

6. The automatic door opening mechanism according to claim 4, characterized in that, The motion track includes a transition track, which connects the second motion track and the first motion track, and the arc angle corresponding to the transition track is 90°.

7. The automatic door opening mechanism according to any one of claims 1 to 6, characterized in that, The rolling assembly includes a roller, a first roller fixing part, and a second roller fixing part. The first roller fixing part and the second roller fixing part are arranged opposite each other along a third direction. The roller rolls between the first roller fixing part and the second roller fixing part. The second roller fixing part moves along the motion track. The end of the telescopic assembly away from the drive mechanism is rotatably connected between the first roller fixing part and the second roller fixing part.

8. The automatic door opening mechanism according to any one of claims 1 to 6, characterized in that, The telescopic assembly includes at least a first telescopic rod and a second telescopic rod, the second telescopic rod extending and retracting within the first telescopic rod, the first telescopic rod being connected to the drive mechanism, and the second telescopic rod being rotatably connected to the rolling assembly; And / or, the driving mechanism includes a driving component and a gear assembly, the driving component driving the gear assembly to rotate, and the gear assembly being connected to one end of the telescopic component.

9. The automatic door opening mechanism according to any one of claims 1 to 6, characterized in that, The automatic door opening mechanism includes a first limit switch and a second limit switch. The first limit switch is releasably abutted against the outer periphery of the rolling assembly; the second limit switch is releasably abutted against the outer periphery of the rolling assembly.

10. A household appliance, characterized in that, include: Box; The door is rotatably connected to the housing; The automatic door opening mechanism according to any one of claims 1 to 9 is disposed in the housing, and the automatic door opening mechanism acts on the door to open the door relative to the housing.

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