Automatic door opening device and electric appliance using same

Abstract

The utility model relates to the technical field of electrical equipment, in particular to an automatic door opening device and an electrical appliance using the automatic door opening device, which comprise a shell, a door pushing mechanism arranged in the shell and a driving mechanism connected with the door pushing mechanism, the door pushing mechanism comprises at least one rotating arm used for pushing a door body and an elastic piece connected with the rotating arm. A rotating part and a force applying part for pushing the door body are formed on the rotating arm; the driving mechanism comprises a transmission part used for driving the rotating part to rotate and a power structure used for driving the transmission part to operate. When the power structure does not drive the transmission part to operate, the rotating arm does not move and abuts against the door body in the closed state. And when the power structure drives the transmission part to operate to drive the rotary arm to rotate so as to enable the force application part to rotate towards one side of the door body, the elastic part is stretched and deformed, and the door body is pushed open by the rotary arm to be in an open state. According to the automatic door opening device, the production cost is reduced, and meanwhile the maintenance convenience of the automatic door opening device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an automatic door opening device and an electrical appliance using the automatic door opening device. Background Art

[0002] With the development of automation functions of electrical appliances such as refrigerators, the door opening process has changed from manual mode to electric mode. In this regard, the prior art uses a rack capable of linear motion and a motor transmission mechanism for driving the rack to achieve automatic opening of the door.

[0003] For example, but not limited to, the automatic door opening device for a refrigerator and the refrigerator having the same disclosed in announcement number CN104061741B, wherein the rack realizes the opening operation of the refrigerator door through its linear motion. For the linear motion rack, on the one hand, considering the assembly of the rack and ensuring its stable operation, the overall length of the rack is relatively long, so that it can be stably matched with the shell and the gear drive structure; on the other hand, in order to meet the space requirements for its linear operation trajectory, the space required for the overall door opening device is relatively large, so the installation space required to be reserved in the refrigerator is also relatively large.

[0004] In addition, for the door opening device of the above structure, it is more convenient to use in a single-door refrigerator, but with the popularization of double-door and four-door refrigerators, a rack-mode door opening mechanism is used to realize the opening of multiple door bodies, and multiple rack-mode door opening mechanisms are required to realize the opening of each door body respectively. For example, the double-door mechanism for refrigerators and refrigerators with the mechanism disclosed in announcement number CN207131244U are respectively provided with a pusher and a corresponding rack and a gear transmission structure for driving the rack to operate. This will undoubtedly greatly increase the structure of the overall refrigerator automatic door opening device, which will increase the overall volume of the refrigerator automatic door opening device structure on the one hand, and increase the probability of failure and the difficulty of maintenance on the other hand.

[0005] Therefore, in view of the demand for automatic door opening of multi-door refrigerators, the performance of the traditional rack-type door opening device needs to be further optimized and improved. Utility Model Content

[0006] The first purpose of the utility model is to provide an automatic door opening device to solve the technical problem of reducing the occupancy rate of the door opening device for the assembly space.

[0007] The second object of the utility model is to provide an electrical appliance to solve the technical problem of reducing the occupancy rate of the door opening device to the assembly space.

[0008] The automatic door opening device of the utility model is realized in this way:

[0009] An automatic door opening device comprises: a housing, a door-pushing mechanism arranged in the housing, and a driving mechanism connected to the door-pushing mechanism; wherein

[0010] The door pushing mechanism comprises at least one swing arm for pushing the door body and an elastic member connected to the swing arm; the swing arm is formed with a rotating part and a force applying part for pushing the door body;

[0011] The driving mechanism includes a transmission member for driving the rotating part to perform rotational motion and a power structure for driving the transmission member to operate;

[0012] When the power structure does not drive the transmission member to operate, the swing arm does not move and abuts against the door body in a closed state; and

[0013] When the power structure drives the transmission member to operate, and drives the swing arm to perform a rotational motion so that the force-applying part rotates toward one side of the door body, the elastic member is stretched and deformed, and the door body is pushed open by the swing arm to be in an open state.

[0014] In an optional implementation of the utility model, the door-pushing mechanism includes a pair of the rotary arms distributed in pairs for pushing a pair of door bodies one by one, and a pair of the elastic members connected to the pair of rotary arms one by one; and the rotating parts of the pair of rotary arms are coaxially arranged; and

[0015] When the transmission member moves along the first direction, the transmission member is suitable for driving the force-applying portion of one of the pair of rotary arms to rotate in the direction of the door body abutting against the rotary arm to open the door body;

[0016] When the transmission member runs in a direction opposite to the first direction, the transmission member is suitable for driving the force-applying portion of the other rotary arm of the pair of rotary arms to rotate in the direction of the door body abutted by the rotary arm to open the door body.

[0017] In an optional implementation of the present invention, the force-applying portions of a pair of rotary arms are respectively in contact with a pair of ends of the door body away from the rotation axis of the door body.

[0018] In an optional implementation of the present invention, the transmission member is a driving gear coaxially connected to the rotating part of the swing arm; and

[0019] A driving member for driving the swing arm to rotate is disposed on the axial end surface of the driving gear facing the swing arm; and a force-bearing portion suitable for abutting and cooperating with the driving member is disposed on the swing arm.

[0020] In an optional implementation of the present invention, the power structure includes at least one transmission gear meshing with the driving gear, and a motor for driving the at least one transmission gear to operate.

[0021] In an optional implementation of the present invention, the force-applying portions of the pair of rotary arms are both bent in a V-shape relative to the rotating portion; and the bending directions of the force-applying portions of the pair of rotary arms relative to the rotating portion are opposite; and

[0022] The housing is also provided with a pair of blocking walls which are adapted to abut against the side ends of the pair of rotary arms facing away from the force-applying part.

[0023] In an optional implementation of the utility model, a pair of rotary arms are respectively provided with a limiting surface abutting against the other rotary arm;

[0024] When any one of the pair of rotary arms performs a rotational motion to a maximum angle under the action of the transmission member, the limiting surface on the rotary arm is suitable for abutting against the limiting surface of the other rotary arm.

[0025] In an optional implementation of the utility model, a first trigger sensing component for sensing the transmission member is further provided in the housing;

[0026] The first trigger sensing assembly comprises a connecting rod movably connected to the housing, an elastic limiter connected to the connecting rod, and a first sensing element suitable for contacting and cooperating with the connecting rod; and

[0027] The transmission member is provided with a boss suitable for abutting against the connecting rod;

[0028] When the transmission member is not driven by the driving structure and the door body is in a closed state, the boss abuts against the connecting rod, and the connecting rod overcomes the elastic force of the elastic limiting member to trigger the first sensing element.

[0029] In an optional implementation of the utility model, the connecting rod includes a main rod for being movably connected to the housing, a first extension rod bent and connected to one end of the main rod and suitable for abutting the boss, and a second extension rod bent and connected to the other end of the main rod and suitable for triggering the first sensing element; and

[0030] The elastic limiting member is connected to the outer angle end surface of the bending angle formed by the main rod and the second extension rod;

[0031] The housing is also provided with a stop wall adapted to abut against the inner angle end surface of the bending angle formed by the main rod and the second extension rod.

[0032] In an optional implementation of the utility model, a pair of second trigger sensing components matched one-to-one with a pair of door bodies are further provided in the housing;

[0033] Each second trigger induction assembly includes a top column suitable for abutting against the door body, a movable seat connected to the top column, an elastic connector with one end abutting against the movable seat, and a second induction element suitable for contacting and cooperating with the movable seat.

[0034] In an optional implementation of the present invention, a guide rail for defining the movable seat is provided in the housing; and

[0035] The movable seat is provided with a guide groove which is slidably matched with the guide rail.

[0036] The electrical appliance of the utility model is realized in this way:

[0037] An electrical appliance comprises: the automatic door opening device.

[0038] By adopting the above technical scheme, the utility model has the following beneficial effects: the automatic door opening device of the utility model and the appliance using the automatic door opening device realize the opening operation of the refrigerator door body through the rotational movement of the swing arm. Compared with the door opening device with a linear motion mode, the swing arm only needs to rotate a certain angle in a small range to realize the opening of the door body. Therefore, the overall operating space required is small, and the corresponding assembly space required is also synchronously small.

[0039] Furthermore, for the door-pushing mechanism, a pair of rotary arms can be used to simultaneously adapt to the opening operation of a pair of door bodies of the electrical appliance, and under this structure, only one set of driving mechanism is needed to simultaneously adapt to a pair of rotary arms, thereby simplifying the structure of the door opening device for the electrical appliance with a pair of door bodies, reducing production costs while improving the convenience of maintenance of the automatic door opening device.

[0040] In addition, for a pair of swing arms and transmission parts, the use of coaxial transmission, on the one hand, simplifies the coordination process of the overall structure, and on the other hand, prevents deviations from occurring during the transmission process, making it more stable and reliable. At the same time, the use of elastic parts in coordination with the swing arms not only provides pulling force for the resetting of the swing arms, but also eliminates the coordination gap between the swing arms and the transmission parts during the transmission process, further improving the reliability of the operation of the automatic door opening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The figure shows the overall structure of the automatic door opening device of the first embodiment of the present utility model;

[0042] Figure 2 The figure shows the interior of the housing of the automatic door opening device of Example 1 of the utility model;

[0043] Figure 3 It is a schematic diagram showing the coordination of a pair of rotary arms of the automatic door opening device of Example 1 of the utility model;

[0044] Figure 4 Shown is a cross-sectional schematic diagram of an automatic door opening device according to Embodiment 1 of the present utility model;

[0045] Figure 5 The figure is a schematic diagram of the structure of the driving gear of the automatic door opening device of Example 1 of the utility model;

[0046] Figure 6 The figure is a schematic diagram of the structure of the first swing arm of the automatic door opening device of Example 1 of the utility model from a first viewing angle;

[0047] Figure 7 It is a schematic diagram of the structure of the first rotary arm of the automatic door opening device of Example 1 of the utility model from a second viewing angle;

[0048] Figure 8 It is a schematic structural diagram of the second swing arm of the automatic door opening device of Example 1 of the utility model;

[0049] Fig. 9 The figure is a schematic diagram of the structure of the connecting rod of the automatic door opening device of the first embodiment of the utility model;

[0050] Fig.10 It is a partial structural schematic diagram of the second trigger sensing component of the automatic door opening device of Example 1 of the utility model;

[0051] Fig.11 The figure shows a schematic diagram of the automatic door opening device of Example 1 of the utility model when a pair of doors of a double-door refrigerator are in a closed state;

[0052] Fig.12 The state diagram of the internal components of the automatic door opening device of Example 1 of the utility model when the door body is in a closed state;

[0053] Fig.13 The figure shows a schematic diagram of the automatic door opening device of Example 1 of the utility model in which one of the door bodies of a pair of door bodies of a double-door refrigerator is pushed open by a rotary arm and is in a closed state;

[0054] Fig.14 The figure shows the state of the internal parts of the automatic door opening device of Embodiment 1 of the utility model when one of the door bodies of a pair of door bodies of a double-door refrigerator is pushed open by the rotary arm and is in a closed state;

[0055] Fig.15 The figure shows a schematic diagram of the automatic door opening device of Example 1 of the utility model in which the other door of a pair of door bodies of a double-door refrigerator is pushed open by a rotary arm and is in a closed state;

[0056] Fig.16 The figure shows the state of the internal components of the automatic door opening device of Example 1 of the utility model when the other door of a pair of door bodies of a double-door refrigerator is pushed open by the rotary arm and is in a closed state. DETAILED DESCRIPTION

[0057] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0058] Embodiment 1:

[0059] See also Figures 1 to 16 As shown, this embodiment provides an automatic door opening device, including: a shell 14, a door pushing mechanism arranged in the shell 14, and a driving mechanism connected to the door pushing mechanism.

[0060] Generally speaking, the door pushing mechanism includes at least one swing arm for pushing the door body 100 and an elastic member connected to the swing arm; a rotating portion and a force-applying portion for pushing the door body 100 are formed on the swing arm. It should be noted here that the door body 100 in this embodiment is opened by a rotational motion, that is, one side edge of the door body 100 is connected to a rotation axis, so that the door body 100 can be opened and closed when it rotates around the rotation axis. Based on this door body 100, the force-applying portion on the swing arm abuts against the door body 100, and the rotational motion of the swing arm is used to realize the rotational opening of the door body 100.

[0061] Based on the above situation, it is necessary to explain that the door-pushing mechanism can use only one swing arm to be applicable to, for example, but not limited to, the rotational opening of a door body 100 (depending on the installation position of the swing arm to be applicable to the opening of the door body 100 in different situations, for example, when a swing arm here is used in a single-door appliance, it can be used to realize the opening of the door body 100 of the single-door appliance; for example, when a swing arm here is used in a double-door appliance, when the swing arm is set at the door gap formed when a pair of door bodies 100 of the double-door appliance are closed, the swing arm can also be used to realize the opening of a pair of door bodies 100). Of course, two swing arms can also be used here to be applicable to the rotational opening of a pair of door bodies 100, and the swing arms and door bodies 100 are arranged one-to-one, that is, one swing arm corresponds to one door body 100. It should be noted that no matter one or two rotary arms are used to open a pair of door bodies 100, the side edges of the pair of door bodies 100 that are applicable at this time and that are opposite to each other are respectively connected to a rotating shaft, that is, the adjacent side edges of a pair of door bodies 100 are movable ends, and the opening operation is achieved by the relative distance between the adjacent side edges of a pair of door bodies 100.

[0062] It is necessary to explain here that, regardless of whether the door push mechanism uses one swing arm or two swing arms, the driving mechanism used in this embodiment only needs to include a transmission member for driving the rotating part to rotate and a power structure for driving the transmission member to operate. In other words, one power structure and one transmission member can meet the use requirements of one swing arm and two swing arms at the same time.

[0063] Based on the above structure, the opening principle of the door body 100 of this embodiment is roughly as follows:

[0064] When the power structure does not drive the transmission member to operate, the transmission member and the swing arm are both in a non-moving state and the swing arm is in contact with the door body 100 which is in a closed state; and when the power structure drives the transmission member to operate to drive the swing arm to rotate so that the force-applying part rotates toward one side of the door body 100, the elastic member is stretched and deformed, and the door body 100 is pushed open by the swing arm to be in an open state.

[0065] Next, this embodiment is described in detail with reference to the accompanying drawings by taking the case where a pair of rotary arms are used to open a pair of door bodies 100 as an example.

[0066] First, roughly speaking, the door-pushing mechanism includes a pair of swing arms distributed in pairs for pushing a pair of door bodies 100 one by one, and a pair of elastic members connected to the pair of swing arms one by one; and the rotating parts of the pair of swing arms are coaxially arranged. Based on this structure, when the transmission member runs in a first direction, the transmission member is suitable for driving the force-applying part of one of the pair of swing arms to rotate in the direction of the door body 100 abutting against the swing arm to open the door body 100; when the transmission member runs in a direction opposite to the first direction, the transmission member is suitable for driving the force-applying part of the other swing arm in the pair of swing arms to rotate in the direction of the door body 100 abutting against the swing arm to open the door body 100.

[0067] That is to say, during the operation of the power structure of this embodiment, a switching control is adopted to open a pair of door bodies 100, that is, when the transmission member is in one running direction, only one corresponding door body 100 can be opened, rather than opening a pair of door bodies 100 at the same time. Such a structure can save energy consumption during use. When the automatic door opening device of this embodiment is applied to an electrical appliance such as a double-door refrigerator, when opening the door body 100 of the refrigerator, only one of the door bodies 100 can be opened (the transmission member only needs to run in the first direction or the second direction) to achieve the taking of items, or both door bodies 100 can be opened (the transmission member first runs in the first direction and then moves in the second direction) to achieve the taking of items. Therefore, based on the structure of this embodiment, the flexibility of the door body 100 opening process can be improved.

[0068] Based on the above situation, in an optional implementation, the force-applying parts of a pair of rotary arms are respectively in contact with the ends of a pair of door bodies 100 away from the rotation axis of the door body 100. Under this structure, the point of action of the force-applying part of the rotary arm on the door body 100 is located at the maximum rotation radius of the door body 100 with the rotation axis corresponding to the door body 100 as the rotation center. According to the principle of lever, the longer the rotation force arm of the door body 100, the smaller the force required. Therefore, the force of the rotary arm at this position to open the door body 100 is the smallest relative to other positions, so the requirements for the driving structure are relatively reduced.

[0069] Furthermore, the optional transmission member adopts a driving gear 3 coaxially connected to the rotating part of the swing arm; and the driving gear 3 is provided with a driving member for driving the swing arm to rotate on the axial end surface facing the swing arm; and the swing arm is provided with a force-bearing part suitable for abutting and cooperating with the driving member. When the door push mechanism is a pair of swing arms, that is, the pair of swing arms are coaxially arranged with the transmission member.

[0070] In addition, the power structure includes at least one transmission gear meshing with the driving gear 3, and a motor 15 for driving the at least one transmission gear to operate. Here, an example is given in conjunction with the accompanying drawings, where the power structure uses a motor 15 and a worm 16 used in conjunction with each other, and a two-stage transmission gear (a bevel gear 13 and a transition gear 10 used in conjunction with each other) is used between the worm 16 and the driving gear 3.

[0071] Next, an optional implementation is given by way of example with reference to the accompanying drawings to explain the detailed structure of each component.

[0072] First is shell 14:

[0073] The housing 14 mainly includes a mounting seat 141, a fixed shaft 142, a first blocking wall 1471, a second blocking wall 1472, a supporting rib 149, a contact end surface 1410, and a positioning notch 14151. The mounting seat 141 is used to fix the motor. The driving gear 3 and at least one primary transmission gear are connected to the housing 14 through the fixed shaft 142 respectively.

[0074] Next is the driving gear 3, which mainly includes a central hole 31, a first driving wall 32, a second driving wall 33, a pillow block end face 34, an outer cylindrical contact surface 35, a limiting step surface 36 and a toothed portion 37. The toothed portion 37 is used to mesh with at least one transmission gear.

[0075] Next is a pair of spiral arms:

[0076] The force-applying parts of a pair of rotary arms are both V-shaped with respect to the rotating part; and the bending directions of the force-applying parts of a pair of rotary arms are opposite to each other; and the housing 14 is also provided with a pair of blocking walls (i.e., a first blocking wall 1471 and a second blocking wall 1472) suitable for abutting against the side ends of the pair of rotary arms facing away from the force-applying parts. The force-applying parts here have a straight action surface abutting against the door body 100 in a closed state. It should be noted that, in this embodiment, the V-shaped bending formed by the force-applying parts of a pair of rotary arms relative to the rotating part does not have an absolute limit on the angle formed by the two, and can be a right angle, an acute angle, or an obtuse angle.

[0077] Furthermore, a pair of swing arms are respectively provided with a limiting surface abutting against the other swing arm; when any swing arm of the pair of swing arms rotates to a maximum angle under the action of the transmission member, the limiting surface on the swing arm is suitable for abutting against the limiting surface of the other swing arm.

[0078] In this regard, for the convenience of describing a pair of rotary arms, the pair of rotary arms are respectively named as the first rotary arm 7 and the second rotary arm 8. The blocking wall on the housing 4 adapted to the first rotary arm 7 is the first blocking wall 1471, and the blocking wall on the housing 4 adapted to the second rotary arm 8 is the second blocking wall 1472. The elastic member adapted to the first rotary arm 7 is the first elastic member 91, and the elastic member adapted to the second rotary arm 8 is the second elastic member 92.

[0079] The first swing arm 7 is designed to have a first center hole 71, a first contact surface 72, a first positioning column 73, a first action surface 74, a first upper limit surface 76, a first bottom surface 77 and a first inner limit surface 78; the second swing arm 9 is designed to have a second center hole 81, a second contact surface 82, a second positioning column 83, a second action surface 84, a second upper limit surface 85, a second bottom surface 87 and a second inner limit surface 88.

[0080] The first action surface 74 and the second action surface 84 are respectively used for abutting and cooperating with the door body 100 in a closed state.

[0081] The first center hole 71 and the second center hole 81 are coaxially connected to the driving gear 3 for rotation. Specifically, the first center hole 71 and the second center hole 81 are matched with the outer circumferential contact surface 35 of the driving gear 3 and can rotate around it, so that the first swing arm 7, the second swing arm 8 and the driving gear 3 can rotate coaxially. That is, the first center hole 71 forms the rotating part of the first swing arm 7, and the second center hole 81 forms the rotating part of the second swing arm 8.

[0082] Furthermore, a first driving wall 32 for driving the first swing arm 7 to make a rotational motion around the first center hole 71 is provided on the axial side end surface of the driving gear 3 facing the first swing arm 7 and the second swing arm 8, and the first driving wall 32 is suitable for abutting and cooperating with the first contact surface 72; a second driving wall 33 for driving the second swing arm 8 to make a rotational motion around the second center hole 81 is also provided on the axial side end surface of the driving gear 3 facing the first swing arm 7 and the second swing arm 8, and the second driving wall 33 is suitable for abutting and cooperating with the second contact surface 82.

[0083] One end of the first elastic member 91 cooperates with the first positioning post 73 of the first swing arm 7, and under the action of its pulling force, the first inner limit surface 78 of the first swing arm 7 contacts and limits the first blocking wall 1471 of the housing 14; one end of the second elastic member 92 cooperates with the second fixing post 1482, and the other end cooperates with the second positioning post 83 of the second swing arm 8, and under the action of its pulling force, the second inner limit surface 88 of the second swing arm 8 contacts and limits the second blocking wall 1472. Here, the end of the first elastic member 92 away from the first swing arm 7 and the end of the second elastic member 92 away from the second swing arm 8 are respectively connected to the fixing post 1481 provided in the housing 14.

[0084] When the first swing arm 7 rotates under the action of the driving gear 3, it overcomes the pulling force of the first elastic member 91 and pushes the corresponding door body 100 to open. When the first swing arm 7 rotates to the point where its first upper limit surface 76 contacts the second upper limit surface 85 of the second swing arm 8, the second swing arm 8 is still in contact with the second blocking wall 1472 under the action of the second elastic member 92. When the second swing arm 8 rotates under the action of the driving gear 3, it overcomes the pulling force of the second elastic member 92 and pushes the door body 100 to open. When the second swing arm 8 rotates to the point where its second upper limit surface 85 contacts the first upper limit surface 76 of the first swing arm 7, the first swing arm 7 is still in contact with the first blocking wall 1471 under the action of the first elastic member 91.

[0085] Based on the above situation, it should be noted that the matching relationship between the housing 14, the driving gear 3, the first swing arm 7 and the second swing arm 8 is as follows:

[0086] The center hole 31 of the driving gear 3 cooperates with the fixed shaft 142 in the housing 14 and can rotate around the fixed shaft 142 ; the pillow block end surface 34 of the driving gear 3 contacts and cooperates with the contact end surface 1410 of the housing 14 , thereby supporting the driving gear 3 .

[0087] The first center hole 71 of the first swing arm 7 cooperates with the outer cylindrical contact surface 35 of the driving gear 3 and can rotate around it, so that the two can rotate coaxially; at the same time, the first bottom surface 77 of the first swing arm 7 cooperates with the supporting rib 149 of the shell 14, thereby supporting the first swing arm 7.

[0088] The second center hole 81 of the second swing arm 8 cooperates with the outer cylindrical contact surface 35 of the driving gear 3 and can rotate around it, so that the two rotate coaxially; the second bottom surface 87 cooperates with the supporting rib 149 of the shell assembly 14 to support the second swing arm 8.

[0089] The first swing arm 7 and the second swing arm 8 are stacked together with the driving gear 3 as the rotation center, and the upper ends are limited in displacement in the height direction by the limiting step surface 36 of the driving gear 3 .

[0090] The first contact surface 72 of the first swing arm 7 cooperates with the first driving wall 32 of the driving gear 3, and the second contact surface 82 of the second swing arm 8 cooperates with the second driving wall 33 of the driving gear 3. Through the above-mentioned cooperation, the first swing arm 7 or the second swing arm 8 is driven to rotate during the rotation of the driving gear 3 in the first direction or the second direction.

[0091] Next, it is to be explained that, in order to perform inductive detection on the position of the driving gear 3, the present embodiment also has the following design:

[0092] The housing 4 is also provided with a first trigger sensing component for sensing the transmission member. For example, in an optional implementation, the first trigger sensing component includes a connecting rod 11 movably connected to the housing 4, an elastic stopper 12 connected to the connecting rod 11, and a first sensing component suitable for contacting and cooperating with the connecting rod 11; and a boss 38 suitable for abutting the connecting rod 11 is provided on the transmission member; when the transmission member is not driven by the driving structure and the door body 100 is in a closed state, the boss 38 abuts against the connecting rod 11, and the connecting rod 11 overcomes the elastic force of the elastic stopper 12 to trigger the first sensing component. The first sensing component here can optionally be a first micro switch 51.

[0093] In more detail, the connecting rod 11 includes a main rod 117 for being movably connected to the shell 4, a first extension rod 118 which is bent and connected to one end of the main rod 117 and is suitable for abutting the boss 38, and a second extension rod 119 which is bent and connected to the other end of the main rod 117 and is suitable for triggering the first sensing element; and the elastic limit member 12 is connected to the outer angle end surface of the bending angle formed by the main rod and the second extension rod 119.

[0094] The first extension rod 117 is provided with a contact end 111 for directly abutting against the boss 38 and an inner circle middle hole 113 for movably connecting with the positioning cylindrical buckle 14110 of the housing 4; the second extension rod 119 is provided with a support positioning column 114 connected to the elastic stopper 12 and a contact step 115 for triggering the first sensing element; the housing 14 is also provided with a stopper wall 1473 suitable for abutting against the inner angle end face of the bending angle formed by the main rod 117 and the second extension rod 119. The end of the elastic stopper 12 away from the second extension rod 119 is connected to the support column 1413 provided in the housing 14.

[0095] It is also necessary to explain that a pair of second trigger sensing components matched one-to-one with a pair of door bodies 100 are also provided in the housing 14. The pair of second trigger sensing components here can optionally adopt the same structure, and the following embodiment will be described by taking the case of any one of the second trigger sensing components as an example.

[0096] Each second trigger induction component includes a top column 401 suitable for abutting against the door body 100, a movable seat 4 connected to the top column 401, an elastic connector 61 with one end abutting against the movable seat 4, and a second induction component suitable for contacting and cooperating with the movable seat 4. The second induction component here can be a second micro switch 52. An inner countersunk hole 403 suitable for partial insertion of the elastic connector 61 is provided in the movable seat 4, and a contact side wall 404 for triggering the induction of the second induction component is formed on the outer side wall of the movable seat 4. The end of the elastic connector 61 away from the movable seat 4 is connected to the limiting wall 14141 in the shell 14. In this regard, in order to facilitate the top column 401 to abut against the door body 100, a positioning notch 14151 suitable for the top column 401 to pass through is also provided in the shell 14. In this embodiment, the shell 14 is also provided with positioning columns 146 for fixing the first induction component and the second induction component.

[0097] In order to limit the trajectory of the movable seat 4 and make its movement more reliable and stable, a guide rail 14121 for limiting the movable seat 4 is provided in the shell 14; and a guide groove 402 slidably matched with the guide rail 14121 is provided on the movable seat 4.

[0098] In summary, regarding the automatic door opening device of this embodiment, its specific use process is taken as an example of application in a double-door refrigerator:

[0099] Fig.11 The figure shows a schematic diagram of the automatic door opening device when a pair of door bodies of a double-door refrigerator are in a closed state. It can be seen from the figure that the first swing arm 7 and the second swing arm 8 of the automatic door opening device cooperate with the right door body 100 and the left door body 100 of the refrigerator respectively. When the refrigerator door body 100 is closed, the first swing arm 7 and the second swing arm 8 are retracted to the inner side of the automatic door opening device under the action of the first elastic member 91 and the second elastic member 92; at the same time, the top columns 401 corresponding to a pair of door bodies 100 are also in a relatively retracted state under the action of the closing of the door body 100.

[0100] Fig.12 The state diagram of the internal components of the automatic door opening device shown in the figure when the door body 100 is in the closed state:

[0101] The first driving wall 32 and the second driving wall 33 on both sides of the driving gear 3 do not contact the first contact surface 72 of the first swing arm 7 and the second contact surface 82 of the second swing arm 8; and the boss 38 of the driving gear 3 cooperates with the contact end 111 of the connecting rod 11, so that the connecting rod 11 overcomes the elastic force of the elastic limit member 12 and triggers the first micro switch 51. Here, the first micro switch 51 is used to detect whether the driving gear 3 is in the middle position (when the driving gear 3 is in the middle position, the driving gear 3 does not produce any driving effect on the first swing arm 7 and the second swing arm 8).

[0102] The first swing arm 7 is retracted into the shell 14 under the pulling force of the first elastic member 91, and its first inner limit surface 78 is limited by the first blocking wall 1471 of the shell 14; the second swing arm 8 is retracted into the shell 14 under the pulling force of the second elastic member 92, and its second inner limit surface 88 is limited by the second blocking wall 1472 of the shell 14.

[0103] The top columns 401 respectively included in the pair of second trigger sensing components are blocked by the door body 100 after closing and are separated from the corresponding second micro switches 52, so the second micro switches 52 respectively included in the pair of second trigger sensing components are in a non-triggered state.

[0104] like Fig.13 and Fig.14 The schematic diagram shown is that the automatic door opening device pushes open one of the doors 100 of a double-door refrigerator.

[0105] When the driving gear 3 moves in the first direction under the action of the driving mechanism in the automatic door opening device, the force-applying part of the first swing arm 7 overcomes the magnetic attraction at the corresponding door body 100 to push the door body 100 to a certain angle so that the user can easily open the door body 100.

[0106] At this time, the driving gear 3 rotates in the direction indicated by the arrow driven by the motor and at least one transmission gear, and the first driving wall 32 pushes the first contact surface 72 of the first swing arm 7 to drive the first swing arm 7 to rotate synchronously with the driving gear 3;

[0107] During the rotation of the first swing arm 7, the pulling force of the first elastic member 91 is overcome and the door body 100 is pushed to open. When the first swing arm 7 rotates to the point where its first upper limit surface 76 contacts the second upper limit surface 85 of the second swing arm 8, the second swing arm 8 is still in contact with the second blocking wall 1472 under the action of the second elastic member 92. Therefore, the driving gear 3 can no longer continue to drive the first swing arm 7 to rotate, and the motor and at least one transmission gear are in a stalled state. At this time, the built-in control system in the refrigerator can detect the stalled current of the motor.

[0108] As the driving gear 3 rotates, its boss 38 separates from the contact end 111 of the connecting rod 11, and the contact step 115 of the connecting rod 11 separates from the first micro switch 51 under the action of the elastic limiter 12. At this time, the first micro switch 51 is in an untriggered state.

[0109] At the same time, due to the opening of the door body 100, the top column 401 of the second trigger sensing component corresponding to the door body 100 is no longer blocked by the door body 100. It is pushed outward under the action of the elastic connecting piece 61 and contacts the second micro switch 52, so that the second micro switch 52 is in a triggered state, which indicates that the door body 100 corresponding to the first swing arm 7 has been opened.

[0110] like Fig.15 and 16 The schematic diagram shown is a diagram of the automatic door opening device opening another door 100 of a double-door refrigerator.

[0111] Under the action of the driving mechanism in the automatic door opening device, the driving gear 3 runs along the second direction, first returns to the middle position and triggers the first micro switch 51 through the action of the boss 38 and the connecting rod 11. At this time, the first swing arm 7 is retracted to its original position under the resetting action of the first elastic member 91; with the action of the driving mechanism, the driving gear 3 continues to rotate, and then drives the force-applying part of the second swing arm 8 to operate to overcome the magnetic attraction at the corresponding door body 100, and push the door body 100 to a certain angle to facilitate the user to easily open the door body 100.

[0112] At this time, the driving gear 3 rotates in the direction indicated by the arrow driven by the motor and at least one transmission gear, and its second driving wall 33 pushes the second contact surface 82 of the second swing arm 8 to drive the second swing arm 8 to rotate synchronously with the driving gear 3.

[0113] During the rotation of the second swing arm 8, the pulling force of the second elastic member 92 is overcome and the refrigerator door 100 is pushed to open. When the second swing arm 8 rotates to its second upper limit surface 85 and contacts the first upper limit surface 76 of the first swing arm 7, the first swing arm 7 is still in contact with the first blocking wall 1471 under the action of the first elastic member 91. Therefore, the driving gear 3 can no longer continue to drive the second swing arm 8 to rotate, and the motor and at least one transmission gear are in a stalled state. At this time, the built-in control system in the refrigerator can detect the stalled current of the motor.

[0114] As the driving gear 3 rotates, its boss 38 separates from the contact end 111 of the connecting rod 11, and the contact step 115 of the connecting rod 11 separates from the first micro switch 51 under the action of the elastic limiter 12. At this time, the first micro switch 51 is in an untriggered state.

[0115] At the same time, due to the opening of the door body 100, the top column 401 of the second trigger sensing component corresponding to the door body 100 is no longer blocked by the door body 100. It is pushed outward under the action of the elastic connecting piece 61 and contacts the second micro switch 52, so that the second micro switch 52 is in a triggered state, which indicates that the door body 100 corresponding to the first swing arm 7 has been opened.

[0116] In the above Fig.13 or Fig.16 When the user opens the door 100 on one side of the double-door refrigerator, the motor in the automatic door opening device controls the driving gear 3 to return to the initial position, and the first swing arm 7 and the second swing arm 8 are retracted into the automatic door opening device under the action of the first elastic member 91 and the second elastic member 93. Fig.12As shown; when the other side door 100 needs to be opened, the motor can drive the corresponding swing arm to respond quickly, thereby reducing the gap time for opening the doors 100 on both sides.

[0117] Embodiment 2:

[0118] Based on the automatic door opening device of Example 1, this embodiment provides an electrical appliance, including: the automatic door opening device of Example 1. The electrical appliance here can be a refrigerator, or other electrical appliances with a door body 100 that needs to be opened automatically, and this embodiment does not make an absolute limitation on this.

[0119] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0120] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0121] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0122] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An automatic door opening device, characterized in that: include: A housing, a door-pushing mechanism disposed in the housing, and a driving mechanism connected to the door-pushing mechanism; in The door pushing mechanism comprises at least one swing arm for pushing the door body and an elastic member connected to the swing arm; the swing arm is formed with a rotating part and a force applying part for pushing the door body; The driving mechanism includes a transmission member for driving the rotating part to perform rotational motion and a power structure for driving the transmission member to operate; When the power structure does not drive the transmission member to operate, the swing arm does not move and abuts against the door body in a closed state; as well as When the power structure drives the transmission member to operate, and drives the swing arm to perform a rotational motion so that the force-applying part rotates toward one side of the door body, the elastic member is stretched and deformed, and the door body is pushed open by the swing arm to be in an open state.

2. The automatic door opening device according to claim 1, characterized in that: The door-pushing mechanism comprises a pair of said rotary arms distributed in pairs and used for pushing a pair of door bodies one by one, and a pair of said elastic members connected to the pair of rotary arms one by one; and the rotating parts of the pair of rotary arms are coaxially arranged; When the transmission member moves along the first direction, the transmission member is suitable for driving the force-applying portion of one of the pair of rotary arms to rotate in the direction of the door body abutting against the rotary arm to open the door body; When the transmission member runs in a direction opposite to the first direction, the transmission member is suitable for driving the force-applying portion of the other rotary arm of the pair of rotary arms to rotate in the direction of the door body abutted by the rotary arm to open the door body.

3. The automatic door opening device according to claim 2, characterized in that: The force-applying parts of a pair of rotary arms are respectively in contact with the end parts of a pair of door bodies away from the rotating shaft of the door bodies.

4. The automatic door opening device according to any one of claims 1 to 3, characterized in that: The transmission member is a driving gear coaxially connected to the rotating part of the swing arm; and A driving member for driving the swing arm to rotate is disposed on the axial end surface of the driving gear facing the swing arm; and a force-bearing portion suitable for abutting and cooperating with the driving member is disposed on the swing arm.

5. The automatic door opening device according to claim 4, characterized in that: The power structure includes at least one transmission gear meshing with the driving gear, and a motor for driving the at least one transmission gear to operate.

6. The automatic door opening device according to claim 2 or 3, characterized in that: The force-applying parts of the pair of rotary arms are both bent in a V-shape relative to the rotating part; and the bending directions of the force-applying parts of the pair of rotary arms relative to the rotating part are opposite; and The housing is also provided with a pair of blocking walls which are adapted to abut against the side ends of the pair of rotary arms facing away from the force-applying part.

7. The automatic door opening device according to claim 2 or 3, characterized in that: A pair of rotary arms are respectively provided with a limiting surface abutting against the other rotary arm; When any one of the pair of rotary arms performs a rotational motion to a maximum angle under the action of the transmission member, the limiting surface on the rotary arm is suitable for abutting against the limiting surface of the other rotary arm.

8. The automatic door opening device according to any one of claims 1 to 3, characterized in that: The housing is also provided with a first trigger sensing component for sensing the transmission member; The first trigger sensing assembly comprises a connecting rod movably connected to the housing, an elastic limiter connected to the connecting rod, and a first sensing element suitable for contacting and cooperating with the connecting rod; and The transmission member is provided with a boss suitable for abutting against the connecting rod; When the transmission member is not driven by the driving structure and the door body is in a closed state, the boss abuts against the connecting rod, and the connecting rod overcomes the elastic force of the elastic limiting member to trigger the first sensing element.

9. The automatic door opening device according to claim 8, characterized in that: The connecting rod comprises a main rod for being movably connected to the housing, a first extension rod bent and connected to one end of the main rod and suitable for abutting against the boss, and a second extension rod bent and connected to the other end of the main rod and suitable for triggering the first sensing element; and The elastic limiting member is connected to the outer angle end surface of the bending angle formed by the main rod and the second extension rod; The housing is also provided with a stop wall adapted to abut against the inner angle end surface of the bending angle formed by the main rod and the second extension rod.

10. The automatic door opening device according to claim 2 or 3, characterized in that: A pair of second trigger sensing components matched one-to-one with a pair of door bodies are also provided in the housing; Each second trigger induction assembly includes a top column suitable for abutting against the door body, a movable seat connected to the top column, an elastic connector with one end abutting against the movable seat, and a second induction element suitable for contacting and cooperating with the movable seat.

11. The automatic door opening device according to claim 10, characterized in that: The housing is provided with a guide rail for defining the movable seat; and The movable seat is provided with a guide groove which is slidably matched with the guide rail.

12. An electrical appliance, characterized in that: include: An automatic door opening device as claimed in any one of claims 1 to 11.

Images