Automatic door opening and closing device and refrigerator

Abstract

The present invention discloses an automatic door opening and closing device and a refrigerator, which are used to realize the automatic opening and closing of the door body, and include: a push rod, which is used to push the door body to open and pull the door body to close; a driving component, which is used to drive the telescopic movement of the push rod; and a locking structure, which is arranged between the push rod and the door body, and is used to realize the locking and unlocking of the connection between the push rod and the door body. By setting the locking structure, which is arranged between the push rod and the door body, and is used to realize the locking and unlocking of the connection between the push rod and the door body; it is conducive to realizing the connection between the push rod and the door body, and the door body can be pushed open when the push rod is extended outward, and the door body can be driven to close when the push rod is retracted inward; it is conducive to the force on the push rod acting on the door body, and the connection and disconnection between the push rod and the door body are realized through the locking and unlocking of the locking structure, and the push rod can be retracted after the user opens the door body, so as to avoid the extended push rod interfering with the user's action or sight, and avoid impact on the push rod.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerators, and in particular relates to an automatic door opening and closing device and a refrigerator. Background Art

[0002] With the improvement of residents' living standards, refrigerators have become essential household appliances. The capacity of refrigerators has also begun to expand, and refrigerator doors have become heavier. However, the weight of refrigerator doors will make it inconvenient for people to open them. In particular, in order to improve the sealing performance, the door seals with greater suction force are used.

[0003] When the door is opened, it is necessary to overcome the closing force provided by the hinge and the suction force of the door seal, which requires a large force. In order to achieve easy door opening, an automatic door opening device has emerged. After receiving the door opening signal, it pushes the door open for a distance, and then manually opens and closes the refrigerator door.

[0004] The automatic door opening device pushes the door open a certain distance and waits for the user to open it. In actual applications, it is often the case that the user forgets to open the door at this time, and the door will remain open, which may cause the internal temperature to rise, causing food to spoil, and causing the refrigerator to be in a continuous cooling state, resulting in energy waste.

[0005] In addition, when the push rod pushes the door body to open, the push rod moves in a straight line, while the door body rotates around the intersection axis. That is, in the process of the push rod pushing the door body to open, the contact area between the push rod and the door body gradually decreases, and only a part of the force on the push rod acts on the door body.

[0006] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In view of the above problems in the prior art, the present invention provides an automatic door opening and closing device, which can realize automatic opening and closing of a door body and prevent the door body from being in an open state all the time.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0009] An automatic door opening and closing device, which is used to realize automatic opening and closing of the door body, comprises:

[0010] A push rod, which is retractable and used to push the door body open and pull the door body closed;

[0011] A driving component, used for driving the push rod to move telescopically;

[0012] The locking structure is arranged between the push rod and the door body, and is used to realize locking and unlocking of the connection between the push rod and the door body.

[0013] Furthermore, the locking structure comprises a lock hook arranged at the protruding end of the push rod and a lock rod arranged on the door body and matching with the lock hook, and the lock hook and the lock rod have a mutually cooperating locking state and a mutually separable unlocking state.

[0014] Furthermore, the lock hook is rotatably arranged on the push rod, and the automatic door opening and closing device also includes a pushing structure for pushing the lock hook to rotate.

[0015] Furthermore, the pushing structure comprises a connecting rod assembly which is arranged on the pushing rod and hinged to the locking hook, and a fixed stopper which is used to realize the action of the connecting rod assembly.

[0016] Furthermore, the connecting rod assembly includes a first swing rod and a second swing rod hingedly arranged on the push rod at intervals, a first connecting rod hinged between the first swing rod and the second swing rod, and a second connecting rod hinged between the first connecting rod and the locking hook.

[0017] Furthermore, one end of the first swing arm is hinged on the push rod, and the other end extends toward the direction close to the stopper and protrudes from the push rod, and the distance that the first swing arm protrudes from the push rod is greater than the distance between the stopper and the push rod.

[0018] Furthermore, the first swing arm comprises a first swing arm body hinged to the push rod and a first roller disposed at the end of the first swing arm body and close to the stopper.

[0019] Furthermore, one end of the second swing rod is hinged on the push rod, and the other end extends toward the direction close to the stopper and protrudes from the push rod, and the distance that the second swing rod protrudes from the push rod is greater than the distance between the stopper and the push rod.

[0020] Furthermore, the pushing structure also has a return spring and a mounting block for mounting the return spring. An extension column extending toward the mounting block is provided at one end of the first connecting rod, and the return spring is sleeved on the extension column.

[0021] Furthermore, when the push rod is extended into place, the stopper blocks the connecting rod assembly and drives the locking hook to rotate, so that the locking hook and the locking rod are in an unlocked state.

[0022] Furthermore, after the push rod is extended into position, if the door body is not opened by the user within a set time, the driving component drives the push rod to retract, and the locking structure is locked at the same time, so that the door body is driven to close.

[0023] Furthermore, it also includes a transmission component arranged between the driving component and the push rod, and the push rod is provided with a rack meshing with the transmission component.

[0024] Furthermore, it also includes a base fixed on the box body, and the push rod is located on the base so as to be telescopic forward and backward.

[0025] Furthermore, it also includes a switch for cutting off the power supply circuit of the driving component, which is triggered after the push rod is extended or retracted into place.

[0026] Furthermore, the transmission component has a first gear, on which a matching edge coaxially matched with the switch is provided, and the matching edge has a non-triggering segment and triggering segments located at both ends of the non-triggering segment.

[0027] Furthermore, the distance between the trigger end and the axis of the first gear is smaller than the distance between the non-trigger section and the axis of the first gear.

[0028] Based on the above-mentioned automatic door opening and closing device, the present invention also provides a refrigerator with the above-mentioned automatic door opening and closing device, which can realize automatic opening and closing of the door body to avoid the door body being in an open state all the time.

[0029] A refrigerator, comprising:

[0030] Box;

[0031] A door body, which is hingedly arranged on the box body;

[0032] The above-mentioned automatic door opening and closing device is used to realize automatic opening and closing of the door body.

[0033] Furthermore, the automatic door opening and closing device is arranged on a side away from the hinge axis.

[0034] Compared with the prior art, the advantages and positive effects of the present invention are: by setting a locking structure, which is set between the push rod and the door body, it is used to realize the locking and unlocking of the connection between the push rod and the door body; it is conducive to realizing the connection between the push rod and the door body, and the door body can be pushed open when the push rod is extended outward, and the door body can be driven to close when the push rod is retracted inward; it is conducive to exerting the force on the push rod on the door body, and the connection and release of the push rod and the door body are realized through the locking and unlocking of the locking structure. After the user opens the door body, the push rod can be retracted to avoid the extended push rod interfering with the user's movements or vision, and avoid impact on the push rod.

[0035] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic structural diagram of an embodiment of the automatic door opening and closing device proposed by the present invention;

[0038] Figure 2 for Figure 1 A schematic diagram of the structure of the automatic door opening and closing device in a transverse section after the middle door body is closed;

[0039] Figure 3 for Figure 2 An enlarged structural diagram of the automatic door opening and closing device;

[0040] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part;

[0041] Figure 5 for Figure 4 An enlarged structural diagram of the middle push rod;

[0042] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the first swing rod;

[0043] Figure 7 for Figure 5 A schematic diagram of the enlarged structure of the second swing rod;

[0044] Figure 8 It is a structural schematic diagram when the push rod moves forward to the door body;

[0045] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of the middle part;

[0046] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure of the A area in the middle;

[0047] Fig.11 It is a structural schematic diagram of the process in which the push rod pushes the door body to extend and retract;

[0048] Fig.12 for Fig.11 A schematic diagram of the enlarged structure of the middle part;

[0049] Fig.13 for Fig.12 Schematic diagram of the enlarged structure of the middle B area;

[0050] Fig.14 It is a schematic diagram of the structure after the push rod is extended into place;

[0051] Fig.15 for Fig.14 A schematic diagram of the enlarged structure of the middle part;

[0052] Fig.16 for Fig.15 Schematic diagram of the enlarged structure of the middle C area;

[0053] Fig.17 It is a structural schematic diagram of the door being opened by the user and the push rod being retracted. DETAILED DESCRIPTION

[0054] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0055] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the positional relationship relative to the user when the refrigerator is in normal use. The terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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.

[0057] See also Figure 1-Figure 17, is an embodiment of the automatic door opening and closing device proposed by the present invention, an automatic door opening and closing device 300, which is used to realize the automatic opening and closing of the refrigerator door body 200, the automatic door opening and closing device 300 includes: a push rod 10, a driving component 20 and a locking structure 30, the push rod 10 can be set on the box body 100 to be telescopic, when the push rod 10 extends forward, it can push the door body 200 to open, when the push rod 10 retracts backward, it can pull the door body 200 to close, the driving component 20 is used to drive the telescopic movement of the push rod 10. The locking structure 30 is arranged between the push rod 10 and the door body 200, and is used to realize the locking and unlocking of the connection between the push rod 10 and the door body 200; that is, through the locking structure, the connection and locking between the push rod 10 and the door body 200 can be realized, so that when the push rod 10 moves, it can drive the movement of the door body 200, and when the push rod 10 is extended and retracted, it drives the opening and closing of the door body 200; it is also possible to realize the unlocking of the connection between the push rod 10 and the door body 200, that is, the push rod 10 and the door body 200 are separable, so that after the door body 200 is opened by the user, the push rod 10 can be retracted.

[0058] In this embodiment, a locking structure 30 is provided between the push rod 10 and the door body 200 to realize locking and unlocking of the connection between the push rod 10 and the door body 200; this is beneficial to realizing the connection between the push rod 10 and the door body 200, and the door body 200 can be pushed open when the push rod 10 is extended outward, and the door body 200 can be driven to close when the push rod 10 is retracted inward; this is beneficial to applying the force on the push rod 10 to the door body 200, and the connection and release of the push rod 10 and the door body 200 are realized through the locking and unlocking of the locking structure 30, and the push rod can be retracted after the user opens the door body 200 to prevent the extended push rod 10 from interfering with the user's movements or line of sight, and to avoid impact on the push rod 10.

[0059] See also Fig.11 As shown, the door body 200 is hingedly arranged on the box body 100, and the push rod 10 is arranged on the side away from the hinge axis, which is conducive to the increase of torque and facilitates the door body 200 to be pushed open. After the push rod 10 pushes the door body 200 to open, the angle of the door body 200 is generally between 5° and 15°. To take food out of the refrigerator, the user needs to continue to open the door body 200 by hand; at this time, the user needs less force when opening.

[0060] In other embodiments, the push rod 10 may be disposed on the door body 200 .

[0061] For the specific structure of the locking structure 30, see Figure 3 , Fig.13 and Fig.16As shown, the locking structure 30 includes a lock hook 31 and a lock rod 32. The lock hook 31 is arranged on the push rod 10 near one end of the door body 200, that is, the lock hook 31 is arranged at the protruding end of the push rod 10, and the lock rod 32 is arranged on the door body 200. The lock hook 31 and the lock rod 32 have a mutually matched locking state and a mutually separable unlocking state. When the push rod 10 pushes to open the door body 200 and pulls to close the door body 200, the lock hook 31 and the lock rod 32 are locked with each other, so that the push rod 10 and the door body 200 are connected and locked. After the push rod 10 pushes the door body 200 open, the lock hook 31 and the lock rod 32 are in a mutually separable unlocking state. After the door body 200 is continued to be opened by the user, the push rod 200 retracts; if the user does not continue to open the door body 200 within the set time, the door body 200 needs to be closed at this time, that is, the lock hook 31 and the lock rod 32 are locked with each other, and the push rod 10 is retracted backwards to drive the door body 200 to close. When the door body 200 is in a closed state, the locking structure 30 may be in a locked state, an unlocked state, or a mutually separated state; preferably, the locking structure 30 is set in a mutually separated state.

[0062] For locking and unlocking of the locking structure 30, the lock hook 31 is rotatably arranged on the push rod 10, and the automatic door opening and closing device 300 further includes a pushing structure 40 for pushing the lock hook 31 to rotate. The pushing structure 40 pushes the lock hook 31 to rotate, thereby achieving locking and unlocking between the lock hook 31 and the lock rod 32.

[0063] In other embodiments, the locking hook 31 and the locking rod 32 may be locked and unlocked by setting the locking rod 32 to be retractable.

[0064] For the structure of the propulsion structure 40, see Figure 3-Figure 5 As shown, the pushing structure 40 has a connecting rod assembly 41 arranged on the push rod 10 and a stopper 42 for realizing the action of the connecting rod assembly 41. The connecting rod assembly 41 is hingedly arranged with the lock hook 31. The movement of the connecting rod assembly 41 realizes the rotation of the lock hook 31. The connecting rod assembly 41 and the push rod 10 are extended and retracted together, and the stopper 42 is fixedly arranged. By setting the connecting rod assembly 41 and the stopper 42, during the telescopic movement of the push rod 10, after the connecting rod assembly 41 contacts the stopper 42, the connecting rod assembly 41 moves and deforms, thereby driving the lock hook 31 to rotate and move; the rotation of the lock hook 31 is driven by the mechanical structure, so as to realize the locking and unlocking between the lock hook 31 and the lock rod 32, which is conducive to ensuring the reliability of the pushing structure 40. The stopper 42 has an inclined surface that matches the connecting rod assembly 41.

[0065] See also Fig.16As shown, when the push rod 10 is extended to the right position, the stopper 42 stops the connecting rod assembly 41, so that the connecting rod assembly 41 rotates and drives the lock hook 31 to rotate, so that the lock hook 31 and the lock rod 32 are in an unlocked state. At this time, the user can open the door body 200. If the door body 200 is not opened by the user within the set time, the driving component 20 drives the push rod 10 to retract, so that the connecting rod assembly 41 and the stopper 42 are disengaged, so that the locking structure 30 is locked, so that the door body 200 is driven to close.

[0066] Lieutenant General Figure 4 and Figure 5 As shown, the connecting rod assembly 41 includes a first swing rod 411, a second swing rod 412, a first connecting rod 413 and a second connecting rod 414. The first swing rod 411 and the second swing rod 412 are arranged at intervals in the telescopic direction of the push rod 10. The first swing rod 411 and the second swing rod 412 are both hingedly arranged on the push rod 10. The first connecting rod 413 is hingedly arranged with the first swing rod 411 and the second swing rod 412. The second connecting rod 414 is hingedly arranged between the first connecting rod 413 and the lock hook 31. The first swing rod 411 cooperates with the stopper 42 to realize the movement of the connecting rod assembly 41, thereby pushing the lock hook 31 to rotate around the hinge point with the push rod 10, so that the lock hook 31 and the lock rod 32 are locked and unlocked. The first swing rod 412 cooperates with the stopper 42 to realize the movement of the connecting rod assembly 41, thereby pushing the lock hook 31 to rotate around the hinge point with the push rod 10, so that the lock hook 31 and the lock rod 32 are locked and unlocked. The first swing rod 411 and the second swing rod 412 are arranged in parallel.

[0067] See also Fig.16 As shown, one end of the first rocker arm 411 is hinged on the push rod 10, and the other end extends toward the direction close to the stop block 42 and protrudes from the push rod 10. The distance that the first rocker arm 411 protrudes from the push rod 10 is greater than the distance between the stop block 42 and the push rod 10. That is, during the extension of the push rod 10, the first rocker arm 411 will touch the stop block 42, stopping the first rocker arm 412 from continuing to move, so that the first rocker arm 411 rotates around its hinge point, so that the connecting rod assembly 41 is deformed, and the connecting rod assembly 41 rotates backward relative to the push rod, so that the second connecting rod 414 pulls the lock hook 31 to move backward, thereby realizing the rotation of the lock hook 31.

[0068] See also Figure 6As shown, during the contact between the first swing rod 411 and the stopper 42, the push rod 10 continues to extend, that is, relative movement occurs between the first swing rod 411 and the stopper 42. In order to reduce the friction between the first swing rod 412 and the stopper 42, a first roller 4112 is provided. Specifically, the first swing rod 412 includes a first swing rod body 4111 hinged to the push rod 10 and a first roller 4112 provided at the end of the first swing rod body 4111. The first roller 4112 contacts the stopper 42, and there is roller friction between the two, which is beneficial to the telescopic movement of the push rod 10, and to ensure the relative movement between the two, the rotational movement of the connecting rod assembly 41 is ensured.

[0069] See also Figure 5 and Fig.10 As shown, the first swing rod 411 is on the side away from the extended end of the push rod 10, and the second swing rod 412 is on the side close to the extended end of the push rod 10. One end of the second swing rod 412 is hinged on the push rod 10, and the other end extends in the direction close to the stopper 42 and protrudes from the push rod 10. The distance that the second swing rod 412 protrudes from the push rod 10 is greater than the distance between the stopper 42 and the push rod 10, that is, during the extension of the push rod 10, the second swing rod 412 will touch the stopper 42, blocking the second swing rod 412 from continuing to move, so that the second swing rod 412 rotates around its hinge point, so that the connecting rod assembly 41 is deformed, so that the connecting rod assembly 41 rotates backward relative to the push rod, so that the second connecting rod 414 pulls the lock hook 31 to move backward, and the lock hook 31 rotates.

[0070] During the contact between the second swing rod 412 and the stopper 42, the push rod 10 continues to extend, that is, the second swing rod 412 and the stopper 42 will move relative to each other. In order to reduce the friction between the second swing rod 412 and the stopper 42, a second roller 4212 is provided. Specifically, the second swing rod 412 includes a second swing rod body 4121 hinged to the push rod 10 and a second roller 4212 provided at the end of the second swing rod body 4121. Figure 7 The second roller 4212 is in contact with the stopper 42, and there is roller friction between the two, which is beneficial to the telescopic movement of the push rod 10, and to ensure the relative movement between the two, and to ensure the rotation movement of the connecting rod assembly 41.

[0071] See also Figure 6 As shown, in order to realize the reset of the connecting rod assembly 41 after rotation, the pushing structure 40 also has a reset spring 43 and a mounting block 44 for mounting the reset spring 43. An extension column 4131 extending toward the mounting block 44 is provided at one end of the first connecting rod 413, and the reset spring 43 is sleeved on the extension column 4131. By providing the reset spring 43 for resetting the connecting rod assembly 41 and sleeved the reset spring on the extension column 4131, it is beneficial to promote the reset movement of the first connecting rod 413.

[0072] See also Figure 3 As shown, the automatic door opening and closing device 300 further includes a transmission component 50 disposed between the driving component 20 and the push rod 10, and a rack 13 meshing with the transmission component 50 is disposed on the push rod 10. The rack 13 is also provided to facilitate the transmission of a larger force to the push rod 10 and the telescopic movement of the push rod 10. The automatic door opening and closing device 300 further includes a base 90 fixedly disposed on the box body 100, and the push rod 10 is located in a slideway on the base 90 so as to be telescopic.

[0073] The transmission component 50 is a gear set, and the driving component 20 is a motor. After the driving component 20 rotates forward, the driving component 20 can drive the transmission component 50 to rotate, thereby causing the rack 13 to move forward, so that the push rod 10 extends forward; after the push rod 10 extends forward to the right position, the driving component 20 is powered off and stops. After the driving component 20 rotates reversely, the driving component 20 can drive the transmission component 50 to rotate, thereby causing the rack 13 to move backward, so that the push rod 10 retracts backward; after the push rod 10 retracts backward to the right position, the driving component 20 is powered off and stops.

[0074] See also Figure 4 As shown, in order to realize the automatic stop of the driving component 20 after the push rod 10 moves into position, a switch 61 for cutting off the power supply circuit of the driving component 20 is provided. After the push rod 10 is extended or retracted into position, the switch 61 is triggered, and the main controller controls the power supply circuit of the driving component 20 to cut off the power, so that the driving component 20 stops. Specifically, the transmission component 50 has a first gear 51, and a matching edge 62 is coaxially provided on the first gear 51. The matching edge 62 matches the switch 61, and the matching edge 62 has a non-triggering section 621 and a triggering section 622 located at both ends of the non-triggering section 621; when the push rod 10 is telescopically moved, the first gear 51 rotates, and the switch 61 abuts against the non-triggering section 621, so that the switch 61 is in a closed state, and the switch 61 and the matching edge 62 move relatively; when the push rod 10 is extended or retracted into position, the switch 61 moves from contacting with the non-triggering section 621 to contacting with the triggering section 622, triggering the switch 61. The switch 61 is a micro switch. By setting different distances between the non-triggering section 621 and the triggering section 62 and the switch 61, the switch 61 can be triggered when the triggering section 62 is reached. When the push rod 10 begins to extend or lock in, the switch 61 contacts the triggering section 622. When the driving component 20 starts to rotate, the first gear 51 is driven to rotate, so that the switch 61 contacts the non-triggering section 621; that is, after the first gear 51 starts to rotate, the switch 61 transitions from contacting the non-triggering section 621 to contacting the triggering section 622. It is preferred to set an arc-shaped transition section between the triggering section 622 and the non-triggering section 621, which is conducive to the contact transition between the switch 61 and the mating edge 62. It is preferably set that the distance between the triggering section 622 and the axis of the first gear 51 is smaller than the distance between the non-triggering section 621 and the axis of the first gear 51.

[0075] In other embodiments, the distance between the triggering section 622 and the axis of the first gear 51 may be set to be greater than the distance between the non-triggering section 621 and the axis of the first gear 51 .

[0076] See also Figure 8-Figure 17 , the working process of the automatic door opening and closing device 300 is described, including the following steps:

[0077] S10. The driving component 20 is started, driving the push rod 10 to move outward, so that the locking structures are locked with each other, and continue to push the door body 200 to open.

[0078] After receiving the instruction to open the door body 200, the main controller starts the driving component 20 to rotate forward, and drives the push rod 10 to extend forward through the transmission component 50; Figure 8-Figure 10 When the locking lever 31 is in the unlock state, the second locking lever 412 is in the unlock state, and the second locking lever 414 is in the unlock state, so that the locking lever 31 is locked with the locking lever 32. Figure 11-13 shown.

[0079] S20. After the push rod 10 is extended and moved to the right position, the driving component 20 stops and the locking structure is unlocked.

[0080] When the push rod 10 is extended and about to move into position, the first swing rod 411 reaches the stopper 42, and the push rod 10 continues to move forward, so that the first roller 4112 is stopped at the stopper 42, so that the connecting rod assembly 41 swings backward around the hinge point between the first swing rod 411 and the push rod 10 and the hinge point between the second swing rod 412 and the push rod 10, so that the second connecting rod 414 pulls the lock hook 31 to move backward, so that the lock hook 31 is opened and the lock hook 31 and the lock rod 32 are unlocked. When the push rod 10 is extended and moved into position, the switch 61 is triggered, so that the driving component 20 stops, and the lock hook 31 and the lock rod 32 are unlocked. Figure 14-16 shown.

[0081] S30. Determine whether the door body 200 is continuously opened by the user within the set time, if yes, proceed to step S40; if not, proceed to step S50.

[0082] S40. Start the drive member 20 to rotate in the opposite direction, driving the push rod 10 to retract backward; the user closes the door 200 after taking the food, see Fig.17 shown.

[0083] S50. The driving component 20 is started to rotate in the reverse direction, driving the push rod 10 to retract backwards and close the door body 200.

[0084] At this time, the first swing rod 411 is in a backward swinging state, and the lock hook 31 is in a rotated and open state. The push rod 10 moves backward so that the first swing rod 411 resets relative to the block 42. During the backward movement of the push rod 10, the connecting rod assembly 41 is reset, so that the lock hook 31 is reset and locks the lock rod 32; then the push rod 10 continues to move backward, driving the door body 200 to close; after the door body 200 is closed, the second swing rod 412 reaches the block 42, and the lock hook 31 is driven to open by the rotation of the connecting rod assembly 41; then the push rod 10 continues to retract backward and retracts into place, triggering the switch 61, so that the driving component 20 stops.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An automatic door opening and closing device, It is characterized in that It is used to realize the automatic opening and closing of the door, including: A push rod, which is retractable and used to push the door body open and pull the door body closed; A driving component, used for driving the push rod to move telescopically; A locking structure, which is arranged between the push rod and the door body, and is used to achieve locking and unlocking of the connection between the push rod and the door body; The locking structure comprises a lock hook provided at the extended end of the push rod and a lock rod provided on the door body and matching with the lock hook, and the automatic door opening and closing device further comprises a pushing structure for pushing the lock hook to rotate; The pushing structure comprises a connecting rod assembly arranged on the push rod and hinged to the locking hook, and a fixed stopper for realizing the action of the connecting rod assembly; the connecting rod assembly comprises a first swing rod and a second swing rod hingedly arranged on the push rod at intervals, a first connecting rod hinged between the first swing rod and the second swing rod, and a second connecting rod hinged between the first connecting rod and the locking hook; One end of the first swing rod is hinged on the push rod, and the other end extends toward the direction close to the stopper and protrudes from the push rod; one end of the second swing rod is hinged on the push rod, and the other end extends toward the direction close to the stopper and protrudes from the push rod.

2. The automatic door opening and closing device according to claim 1, It is characterized in that The lock hook and the lock rod have a mutually matched locking state and a mutually separable unlocking state.

3. The automatic door opening and closing device according to claim 2, It is characterized in that The locking hook is rotatably arranged on the push rod.

4. The automatic door opening and closing device according to claim 1, It is characterized in that The distance that the first swing rod protrudes from the push rod is greater than the distance between the stopper and the push rod.

5. The automatic door opening and closing device according to claim 4, It is characterized in that The first swing rod comprises a first swing rod body hinged to the push rod and a first roller arranged at the end of the first swing rod body and close to the stopper.

6. The automatic door opening and closing device according to claim 1, It is characterized in that The distance that the second swing rod protrudes from the push rod is greater than the distance between the stopper and the push rod.

7. The automatic door opening and closing device according to any one of claims 1 to 6, It is characterized in that The pushing structure also has a return spring and a mounting block for mounting the return spring. An extension column extending toward the mounting block is provided at one end of the first connecting rod, and the return spring is sleeved on the extension column.

8. A refrigerator, It is characterized in that include: Box; A door body, which is hingedly arranged on the box body; The automatic door opening and closing device according to any one of claims 1 to 7 is used to realize automatic opening and closing of the door body.

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