CN104329885B - Automatic door opening device and refrigerator with the device - Google Patents

Abstract

The invention discloses a kind of automatic door operator and be provided with the refrigerator of this device.Described automatic door operator includes pedestal, drives source component, impeller, transmission body, control device.Described transmission body includes travelling gear and the transmission chi being arranged between travelling gear and impeller.Transmission chi have be arranged at side with the input tooth bar of travelling gear engaged transmission and be arranged at the output tooth bar of transmission chi opposite side.Described impeller has the driver plate being rotationally fixed on pedestal and fixes the push rod being connected with driver plate.Described driver plate has disk body and the driven tooth bar being arranged on disk body outer peripheral face.Described impeller is set to: when travelling gear promotes transmission chi to move by input tooth bar, described output tooth bar engages with the driven tooth bar on described driver plate mobile and makes driver plate drive push rod to stretch out to external rotation.

Description

Automatic door opening device and refrigerator with the device

technical field

The invention relates to an automatic door opening device and a refrigerator with the device.

Background technique

With the continuous improvement of people's living standards, great changes have taken place in consumption concepts. Refrigerators with beautiful appearance, large volume and rich functions have become the darling of the market. However, when the volume of the refrigerator increases, the weight of the corresponding door body or drawer load and the suction force of the door body or the door seal of the drawer type door body are also relatively large, resulting in more and more users reporting that the refrigerator door body is difficult to open .

Therefore, it is necessary to provide an improved automatic door opening device and a refrigerator with the device to solve the above problems.

Contents of the invention

The object of the present invention is to provide an automatic door opening device for conveniently opening the door body and a refrigerator with the device.

The present invention can be realized through the following technical solutions: an automatic door opening device, comprising: a base; a drive source component fixed in the base; a pusher used to push the door; a transmission body arranged between the drive source component and the pusher Among them, the transmission body includes a transmission gear and a transmission ruler arranged between the transmission gear and the pushing member. The transmission ruler has an input rack arranged on one side for meshing with the transmission gear and an input rack arranged on the other side of the transmission ruler. Output rack; control device, electrically connected with the drive source component; wherein, the pusher has a dial that is rotatably fixed on the base and a push rod that is fixedly connected with the dial; the dial has The disc body and the driven rack arranged on the peripheral surface of the disc body, the pusher is set to: when the transmission gear moves the transmission ruler through the input rack, the output rack and the driven rack on the dial The gear rack meshes and moves so that the dial drives the push rod to rotate outwards and stretch out.

As a further improvement of the present invention, the transmission ruler is provided with two sets of output racks at intervals, and the automatic door opening device includes two sets of pushers respectively matched with the two sets of output racks to open two For the door body, the two sets of pushers are arranged in such a way that: when the two doors are closed, the two sets of pushers are accommodated in the base and extend toward each other; when the transmission ruler is pushed away from one of the pushers, One of the pushing members is pushed by the output rack to rotate outwards and protrude.

As a further improvement of the present invention, the output rack and the driven rack of the dial are set to: when the transmission ruler moves, the output rack and the driven rack cooperate with each other to input a constant torque to the drive source member It is converted into continuously changing output torque and supplied to the ejector rod.

As a further improvement of the present invention, the input rack extends along the length direction of the transmission scale, the output rack extends obliquely compared to the input rack, and the dial is an eccentric gear.

As a further improvement of the present invention, sensing parts are arranged at intervals along the length direction of the transmission ruler, and the automatic door opening device also includes a sensing mechanism fixed in the base to cooperate with the sensing parts. The sensing mechanism is electrically connected with the control device, and the sensing mechanism and the sensing part are set such that: when the door is in a closed state, the sensing mechanism abuts against one of the sensing parts; when the transmission ruler moves to open the door , the sensing mechanism abuts against another sensing part, and the control device controls the driving source component to drive the pusher to extend or retract according to the abutting state of the sensing mechanism and a different sensing part.

As a further improvement of the present invention, the input rack is parallel to the output rack, and the transmission body further includes a conjugate gear set, and the transmission gear is arranged at the output end of the conjugate gear set, wherein the drive The source member provides input torque to the conjugate gear set configured to convert the input torque into a continuously varying output torque to the transfer gear.

As a further improvement of the present invention, the automatic door opening device divides the opening process of the door body into three opening stages, which are respectively: the first opening stage of overcoming the suction force and the automatic closing and locking force, in the first stage to the automatic door opening device The second opening stage in which the door body is separated from the drive, and the third opening stage in which the door body moves under the action of inertia; the transmission ratio of the conjugate gear set increases gradually from the initial state to the end of the second opening stage. Then gradually decrease, wherein the maximum point of the transmission ratio of the conjugate gear set falls in the first opening stage.

As a further improvement of the present invention, the conjugate gear set includes an eccentric circular gear driven by the driving source component and a non-circular gear conjugated to the eccentric circular gear, and the dial is coaxial with the non-circular gear.

As a further improvement of the present invention, the drive source component includes a motor fixedly arranged in the base, and a gear set arranged at the output end of the motor.

The present invention can also be realized through the following technical solutions: a refrigerator, comprising a box body with a compartment, a drawer arranged on the box body, and a door body for opening or closing the compartment, the refrigerator is provided with a function for opening the drawer or The automatic door opening device of the door body.

Compared with the prior art, the automatic door-opening device of the present invention controls the driving source component through the control device to drive the transmission body to transmit the output force to the pusher, so that the pusher rotates and stretches out to push the door open, thus providing the user with The power assist makes it convenient and labor-saving for the user to open the door, bringing comfort and convenience to the use of the refrigerator.

Description of drawings

Fig. 1 is a perspective view of a preferred embodiment of the automatic opening device of the present invention.

Fig. 2 is a perspective view of the automatic door opening device in Fig. 1 when a pusher is pushed out.

Fig. 3 is a three-dimensional exploded view of the automatic door opening device in Fig. 1 .

Fig. 4 is a top view of the automatic door opening device in Fig. 1 when the cover is removed.

FIG. 5 is a schematic diagram showing the state of pushing out of one of the push members of the automatic door opening device in FIG. 4 .

Fig. 6 is a schematic diagram of the automatic door opening device in Fig. 4 when one of the pushers is pushed out.

Fig. 7 is a partial structural diagram of another preferred embodiment of the automatic door opening device of the present invention.

Fig. 8 is a partial structural perspective view of the refrigerator of the present invention.

specific embodiment

The present invention will be described in detail below in conjunction with various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

In the following description of the present invention, it should be understood that: "front" refers to the direction close to the user, "rear" refers to the direction away from the user, "left" refers to the left side of the user, and "right" refers to the direction away from the user. ” refers to the right side of the user. In the following descriptions about the directions "front", "rear", "left", and "right", if there is no special explanation, this is to be understood.

1 to 6 show a preferred embodiment of the automatic door opening device 100 of the present invention, the automatic door opening device 100 of the present invention can be applied to any equipment that needs to be opened electrically, such as a refrigerator, and installed on the door of the equipment or behind the door of the drawer to open the door of the device or the door of the drawer on the device by pushing. The automatic door opening device 100 includes a base 1, a drive source component 2 fixed in the base 1, a pusher 3 for pushing the door body, a transmission body 4 connected between the drive source component 2 and the pusher 3, The sensing mechanism 5 fixed in the base 1 and the control device (not shown) electrically connecting the sensing mechanism 5 and the driving source component 2 . The automatic opening device 100 of the present invention is used to electrically open two doors, so that two sets of the pusher 3 are correspondingly provided; of course, only one set of the pusher 3 can be provided to electrically open one door.

As shown in FIGS. 1 to 4 , the base 1 is a rectangular box-shaped structure, which includes a box body 11 and a cover body 12 that are engaged with each other, and a container formed between the box body 11 and the cover body 12 . Set chamber 13.

The box body 11 has a bottom wall 111 facing the cover body 12 and surrounding walls respectively extending from the bottom wall 111 toward the cover body 12 . The peripheral wall includes a front wall 112 and a rear wall 113 oppositely arranged and two sidewalls 114 oppositely arranged.

In this embodiment, the front wall 112 is formed with two elongated openings 1120 through which two groups of the pushing members 3 protrude respectively, and the two openings 1120 both extend along the left and right directions. Of course, when only one set of pushers 3 is provided, one opening 1120 can be opened correspondingly.

The bottom wall 111 is sequentially provided with a housing portion 115 for accommodating the pusher 3, a strip-shaped guide rail 116 extending in the left and right direction, a positioning mechanism 117 for positioning the sensor mechanism 5, a first rotating shaft 118 and a motor fixed from front to back. The slot 119, and the second rotating shaft 1191 arranged beside the motor fixing slot 119.

The receiving portion 115 communicates with the two openings 1120 , and a pivot 1151 protrudes from the left and right ends respectively. When only one set of the pusher 3 is provided, one pivot 1151 can be provided at one end of the receiving portion 115 .

The positioning mechanism 117 includes a plurality of hooks 1171 extending toward the cover body 12, sliding slots 1172 formed between the hooks 1171, a baffle plate 1173 protruding into the inner side of the sliding slots 1172, and a baffle plate 1173 located in the sliding slots 1172 close to the guide rail 116. The positioning boss 1174 on one side, the chute 1171 extends along the direction perpendicular to the guide rail 116 , and the baffle 1173 is disposed on the side of the chute 1172 away from the guide rail 116 . The positioning boss 1174 is formed with a receiving groove 1175 communicating with the sliding groove 1172 .

3 and 4, in this embodiment, the drive source component 2 includes a motor 21 fixedly arranged in the motor fixing groove 119 of the base 1, a worm screw 22 arranged at the output end of the motor 21, and a second The rotating shaft 1191 rotates the worm wheel 23 fixed in the base 1 and the output gear 24 coaxially arranged with the worm wheel 23 . The worm 22 is meshed with the worm wheel 23 , so that the worm wheel 23 is driven by the worm 22 to rotate when the motor 21 is working, and then output through the output gear 24 . The worm gear 23 and the output gear 24 form a gear set.

The transmission body 4 includes a transmission gear 41 meshing with the output gear 24 , and a transmission ruler 42 arranged between the transmission gear 41 and the pusher 3 . The transmission gear 41 is fixed in the base 1 through the first rotating shaft 118 . The side of the transmission ruler 42 facing the bottom wall 111 is provided with a sliding groove 420 that is slidingly matched with the guide rail 116 .

The transmission scale 42 also has an input rack 421 disposed on one side for meshing transmission with the transmission gear 41 and an output rack 422 disposed on the other side of the transmission scale 42 . In this embodiment, corresponding to two groups of the pushing members 3 , two output racks 422 are provided at both ends of the transmission scale 42 at intervals. The output rack 422 is obliquely extended relative to the input rack 421 , and the input rack 421 is located between the two output racks 422 . The input rack 421 is located in the middle of the rear side of the transmission ruler 42 . Sensing parts are also arranged at intervals along the length direction of the transmission ruler 42 . In this embodiment, in order to facilitate the setting of the sensing mechanism 5, the sensing part is set on one side of the input rack 421 along the length direction of the transmission scale 42, specifically on the left side, and of course it can also be set on the right side. side. The sensing part is a protrusion protruding backward. When only one set of pusher 3 is provided, two protrusions arranged at intervals, that is, two sensing parts, can be provided to detect the reset state and the push-out state of the pusher 3 respectively. That is, when the door body is in a closed state, the sensing mechanism 5 abuts against one of the sensing parts; when the transmission ruler 42 moves to open the door body, the sensing mechanism 5 abuts against the other sensing part, The control device controls the drive source component 2 to drive the pusher 3 to extend or retreat according to the reset state and the push-out state.

In this embodiment, three sensing parts 423, 424, 425, left, middle and right, are arranged at intervals along the length direction of the transmission ruler 42, and the sensing mechanism 5 and the sensing parts are arranged as follows: In the closed state, the sensing mechanism 5 abuts against the middle sensing part 424; when the left or right side of the two doors is opened, the sensing mechanism 5 contacts the left sensing part 423 or the right sensing part. 425, the control device controls the driving source component 2 to drive the pusher 3 to extend or retract according to the contact state of the sensing mechanism 5 and the three left, middle and right sensing parts 423, 424, 425.

Each of the pushers 3 has a dial 31 rotatably fixed on the base 1 via a pivot 1151 and a push rod 32 fixedly connected to the dial 31 . The dial 31 is located outside the output rack 422 and has a disc body 311 and a driven rack 312 disposed on the outer peripheral surface of the disc body 311 . In this embodiment, the dial 31 is a dial gear that is rotatably fixed on the pivot 1151, and the push rod 32 is also fixed on the pivot 1151 and is located on the upper side of the disc body 311 of the dial 31 or The lower side; of course, the dial 31 and the push rod 32 can also be integrated, that is, the dial 31 is directly formed on one end of the push rod 32, which can also achieve the purpose of the present invention.

In addition, as shown in FIG. 3 to FIG. 6 , in this embodiment, in order to make the automatic door opening device 100 of the present invention more truly reflect the process of people opening the door, the output rack 422 and the dial 31 The driven rack 312 is set such that when the transmission ruler 42 moves, the output rack 422 cooperates with the driven rack 312 of the dial 31 to convert the constant torque input by the drive source member 2 into a continuously variable output torque. Provided to the ejector pin 32. In this case, in this embodiment, the input rack 421 extends along the length direction of the transmission scale 42, the output rack 422 extends obliquely compared to the input rack 421, and the dial 31 is formed by a special-shaped eccentric A gear is formed, and the driven rack 312 is also arranged in an obliquely extending special-shaped arc shape, so as to move in mesh with the output rack 422 when the transmission ruler 42 moves. Of course, the output rack 422 can also be arranged parallel to the input rack 421 , at this time, the dial 31 can be arranged as a circular gear or a sector gear to cooperate with the output rack 422 .

The pusher 3 is set such that when the two doors are closed, two groups of the pusher 3 are accommodated in the receiving portion 115 of the base 1 and extend toward each other, and the two groups of the pusher 3 can be divided into left and right sides. Pusher and right pusher; when the transmission gear 41 pushes the transmission scale 42 through the input rack 421 to move away from one of the pusher 3 (for example, the left pusher 3), the output of the left pusher 3 The rack 422 starts to mesh with the driven rack 312 of the dial 31 on the left pusher 3, and the driven rack 312 is pushed by the output rack 422 to move, so that the dial 31 drives the push rod 32 to pivot The shaft 1151 is rotated outward, that is, the left pusher 3 is rotated outward to push open the corresponding door body.

As shown in FIG. 3 to FIG. 6 , each of the sensing mechanisms 5 has a first switch member 51 fixed in the receiving groove 1175 of the base 1 and a second switch slidably fixed in the sliding groove 1172 of the base 1 piece 52. In this embodiment, the second switch member 52 includes a fixing frame 521 fixed in the slide groove 1172, a contact element 522 arranged on the fixing frame 521 to conduct or disconnect the first switch member 51, a clamping The elastic element 523 is fixed between the fixing frame 521 and the baffle plate 1173 in the sliding groove 1172 . The fixing frame 521 has a conflicting protrusion 5211 that protrudes toward the direction of the transmission ruler 42. The conflicting protrusion 5211 and the first switch member 51 are staggered along the thickness direction of the base 1. The first switch member 51 and the contact element 522 are arranged along the The extending direction of the chute 1172 is set correspondingly. In this embodiment, the elastic element 523 is a compression spring.

The sensing mechanism 5 is configured such that when the conflicting protrusion 5211 collides with each sensing portion 423 , 424 , 425 , the second switch member 52 is moved against and the contact element 522 is disconnected from the first switch member 51 . Open connection; when the conflicting protrusion 5211 is separated from each sensing part 423 , 424 , 425 , the second switch part 52 is reset under the action of the elastic element 523 to make the contact element 522 conduct with the first switch part 51 .

As shown in Figures 4 to 6, the sensing process is specifically:

In the initial state where the two doors are all closed, the two pushers 3 are accommodated in the accommodating portion 115, and the starting end of the driven rack 312 on the dial 31 is connected to the inner side of the output rack 422 on the transmission scale 42. In the sensing mechanism 5, the conflicting protrusion 5211 of the second switch part 52 is against the outwardly protruding middle sensing part 424, the elastic element 523 is in a compressed state, and the first switch part 51 and the second The contact element 522 in the switch member 52 is disconnected;

When the control device receives a signal that one of the doors needs to be opened (the signal can be triggered by a touch switch electrically connected to the control device provided on the door), the control device controls the motor 21 in the drive source component 2 to rotate, The motor 21 transmits the driving force to the pusher 3 corresponding to the door body through the transmission body 4, such as the left pusher 3, that is, the input rack 421 (that is, the drive ruler 42) is pushed away from the left side through the transmission gear 41 The right side of the part 3 moves, and the output rack 422 close to the left pusher 3 starts to mesh with the driven rack 312 of the dial 31 on the left pusher 3, and through the output rack 422 Push the driven rack 312 to move, and then the dial 31 drives the ejector rod 32 to rotate outward, that is, the left pusher 3 rotates outward to push out the corresponding door body.

In addition, during the opening process of the door body, when the middle sensing part 424 on the transmission ruler 42 is separated from the sensing mechanism 5, due to the restoring force of the elastic element 523, the second switch member 52 is forced to move toward the transmission ruler 42, The contact element 522 on the second switch member 52 is in contact with the first switch member 51, thereby sending a signal to the control device to inform the motor 21 to continue running, and the transmission ruler 42 is continuously pushed to the right, and the left push member 3 Continue to rotate outward; when the conflicting protrusion 5211 on the second switch part 52 abuts against the left sensing part 423, the second switch part 52 is supported by the second sensing part 35 and moves away from the transmission ruler 42 , so that the contact element 522 in the first switch part 51 and the second switch part 52 is disconnected and disconnected, and at the same time, a signal is sent to the control device, the control device controls the motor 21 to run in reverse, and the transmission ruler 42 is driven by the transmission gear 41 to reverse At the same time, it drives the left pusher 3 to reversely rotate and retreat; when the conflicting protrusion 5211 running on the second switch member 52 abuts against the middle induction part 424, the first switch member 51 is in contact with the second switch member 52 again. The contact element 522 is disengaged and disconnected, and sends a homing signal to the control device. The control device controls the motor 21 to stop running, and the left pusher 3 returns to the initial state, thereby completing a cycle of operation.

During this pushing process, the right pusher 3 does not rotate because it is out of engagement with the output rack 422 on the right, so that the transmission scale 42 will only push the left pusher 3 to move when it moves within the above-mentioned operating cycle. , and then open the left door, which can effectively prevent the two doors from being controlled to open at the same time, resulting in high power consumption and cold air leakage.

In addition, the opening operation process of the right door body is the same as the above description, except that the rotation direction of the motor 21 is just opposite, so that the transmission scale 42 first rotates to the left, and then the output rack 422 on the right is connected to the right pusher 3 Engage the transmission, and then push the right pusher 3 out, and when the sensing mechanism 5 touches the right sensing part 425, it moves backward in the opposite direction.

In addition, referring to Fig. 7, as another preferred embodiment of the present invention, in this embodiment, the output rack 422' is arranged parallel to the input rack 421', at this time, the dial 31' can be a round gear or a sector gear set in cooperation with the output rack 422'. In this case, in order to enable the electric opening of the door to truly reflect the process of people opening the door, that is, the opening process of the door The setting is divided into three opening stages, which are: the first opening stage to overcome the suction force and the automatic closing and locking force, the second opening stage from the first stage to the second opening stage when the automatic door opening device is separated from the door body, and the door body is under the action of inertia. The third opening stage of the downward movement; a conjugate gear set is set in the transmission body 4' in the present invention, and the conjugate gear set can be specifically arranged between the output gear 24' and the transmission gear 41', and is mainly used for In the process of pushing the door to open, from the initial state to the second opening stage, the relatively constant input provided by the motor 21' is converted into a continuously changing output that meets the demand, and then provided to the pusher 3', so that the door can Opens continuously and smoothly.

In addition, because the power of the driving sources such as the motor 21' is fixed, according to the power calculation formula:

P= (T×n)/9550=F0×V0,

Where T= T0/I; T0=F0×r;

It can be seen that P= (F0×r×n)/(9550×I)=F0×V0;

Among them, P is the output power of the motor, T is the output torque of the motor, n is the rated speed of the motor, F0 is the output force, V0 is the output speed (that is, the speed at which the pusher 3' runs), and T0 is the output torque of the entire opening device , I is the transmission ratio of the whole opening device (in the present embodiment, the transmission ratio of the conjugate gear set is mainly set to change, so this transmission ratio can be exemplified by the transmission ratio of the conjugate gear set alone, and The transmission ratio is a continuously changing value), and r is the radius of the last stage output gear in the transmission body 4' that cooperates with the transmission scale 42' (such as the radius of the transmission gear 41' in this embodiment).

It can be seen from the above formula that when a common transmission body is selected, the transmission ratio I is a certain value, the power P and the speed n of the driving source motor are constant, and the output force F0 is also constant; if the transmission ratio I changes, then Output torque T0 and output force F0 may also be varied. However, it can also be seen from the formula that when the rated power P of the motor is constant, the linear velocity V0 and the output force F0 are inversely proportional. Therefore, referring to the above description, because the door is in the process of opening, it will overcome the automatic closing lock. As the required output force F0 increases during the moving process of the tightening force, the speed in this stage does not need to be too large, and basically tends to gradually slow down, so that the torque T of the motor can be greatly reduced. And in order to realize that the automatic door opener pushes the door body at different speeds and powers at different times, and simultaneously staggers the maximum value of the speed and the maximum value of the opening force, it mainly lies in the setting of the transmission ratio I of the conjugate gear set.

Based on the above content, in the automatic door opening device of the present invention, the transmission ratio change of the conjugate gear set from the initial state to the end of the second opening stage is set to gradually increase first, and then gradually decrease, and the conjugate gear set The maximum point of the transmission ratio of the gear set falls in the first opening stage. After this setting, at the critical point of the first opening stage, the driving source only needs to overcome the automatic closing locking force and friction force, that is, the maximum speed of opening the door and the automatic door opening device 100' of the present invention The maximum value of the opening force is staggered, the power of the required input source will be greatly reduced, thereby reducing energy consumption and enabling the door to open smoothly.

In order to achieve the above effect and to enable the door to be opened continuously and smoothly, in this embodiment, the conjugate gear set is set as an eccentric circular gear 43' driven by the drive source component 2' and the eccentric circular gear 43' is composed of a conjugated non-circular gear 44'. At this time, the eccentric circular gear 43' is arranged coaxially with the input gear 40' of the transmission body 4' and the output gear 24', and the non-circular gear is used as the output of the conjugate gear set end and the transmission gear 41' are arranged coaxially, which can also achieve the purpose of the present invention.

In addition, in the above-mentioned specific embodiments of the present invention, a conjugate gear set formed by a non-circular gear and an eccentric circular gear is mainly used to enable the pusher 3' to push the door body forward at a continuously changing speed at different times; of course, by the above It can be seen from the power calculation formula that the conjugate gear set can also be designed to be driven by two conjugated non-circular gears, as long as it can satisfy the opening process of the door according to the force and speed changes basically similar to the opening process of the human body. Yes, it can also achieve the effect of enabling the pusher 3' to push the door body forward at a continuously changing speed at different times. At this time, one of the non-circular gears is arranged coaxially with the input gear 40' for meshing transmission with the output gear 24', and the other non-circular gear is used as the output end of the conjugate gear set and is coaxial with the transmission gear 41' set up.

Based on the above description, it can be seen that in this other preferred embodiment, the automatic door opening device 100' can not only provide assistance when the user needs to open the door, making it convenient and labor-saving for the user to open the door; but also can make the door opening process more realistic. It reflects the process of the human body opening the door body, so that the door body can be opened continuously and smoothly.

Combining the features of the above-mentioned automatic door opening devices 100, 100', as shown in FIG. 8, the present invention also provides a refrigerator 800, which includes a box body 81 with compartments, and a drawer (not shown) arranged on the box body 81. , opening or closing the door body 82 of the compartment and the automatic door opening device 100, 100'. The automatic opening devices 100, 100' used to open the drawer can be installed in the compartment behind the drawer door, or at the rear side of the drawer, etc., all of which can achieve the purpose of the present invention; used to open the door The automatic opening devices 100, 100' of 82 are arranged on the top of the box body 81 or on the front side of the middle partition.

It can be seen from this that the automatic door opening device 100, 100' of the present invention controls the driving source component 2, 2' through the control device to drive the transmission body 4, 4' to transmit the output force to the pusher 3, 3', so that the pusher 3, 3' The door body is pushed open by rotating and protruding, thereby providing assistance when the user needs to open the door, making it convenient and labor-saving for the user to open the door, and bringing comfort and convenience to the use of the refrigerator.

It should be understood that although the description is described according to the embodiments, not each embodiment only includes an independent technical solution, and this description of the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiment or All changes should be included within the protection scope of the present invention.

Claims (10)

1. An automatic door opening device, comprising: base; The driving source component is fixed in the base; A pusher, used to push the door body; The transmission body is arranged between the driving source member and the pusher; It is characterized in that: the automatic door opening device further includes a control device electrically connected to the driving source component; The transmission body includes a transmission gear and a transmission ruler arranged between the transmission gear and the pusher, the transmission ruler has an input rack arranged on one side for meshing with the transmission gear and an output rack arranged on the other side of the transmission ruler ; Wherein, the pusher has a dial rotatably fixed on the base and a push rod fixedly connected with the dial; the dial has a disc body and a driven rack arranged on the peripheral surface of the disc body, so The pusher is set such that when the transmission gear pushes the transmission ruler to move through the input rack, the output rack meshes with the driven rack on the dial to move, so that the dial drives the ejector rod to rotate and extend outward. 2. The automatic door opening device according to claim 1, characterized in that: the transmission ruler is provided with two sets of output racks at intervals, and the automatic door opening device includes two sets of output racks respectively matched with two sets of output racks The pusher is used to correspondingly open the two doors, and the two sets of pushers are arranged as follows: when the two doors are closed, the two sets of pushers are accommodated in the base and extend toward each other; When being pushed to move away from one of the pushing parts, the one of the pushing parts is pushed by the output rack to rotate outwards and protrude. 3. The automatic door opening device according to claim 1, characterized in that: the output rack and the driven rack of the dial are set such that when the transmission ruler moves, the output rack and the driven rack are mutually Cooperate to convert the constant torque input by the driving source member into continuously changing output torque and provide it to the ejector rod. 4. The automatic door opening device according to claim 3, characterized in that: the input rack extends along the length direction of the transmission scale, the output rack extends obliquely compared to the input rack, and the dial is an eccentric gear . 5. The automatic door-opening device according to claim 1, characterized in that: said transmission ruler is also provided with sensing parts at intervals along its length direction, and said automatic door-opening device also includes a sensor fixed in the base to communicate with the sensing part. A matching sensing mechanism, the sensing mechanism is electrically connected to the control device, and the sensing mechanism and the sensing part are arranged such that when the door body is in a closed state, the sensing mechanism abuts against one of the sensing parts ; When the transmission ruler moves to open the door body, the sensing mechanism abuts against another sensing part, and the control device controls the driving source component to drive the pusher according to the abutting state of the sensing mechanism and different sensing parts Extend or retract. 6. The automatic door opening device according to claim 1, characterized in that: the input rack is parallel to the output rack, and the transmission body further includes a conjugate gear set, and the transmission gear is arranged on the conjugate The output end of the gear set, wherein the drive source member provides input torque to the conjugate gear set, and the conjugate gear set is configured to convert the input torque into a continuously variable output torque for the transmission gear. 7. The automatic door opening device according to claim 6, characterized in that: the automatic door opening device divides the opening process of the door body into three opening stages, which are respectively: the first opening to overcome the suction force and the automatic closing locking force stage, from the first stage to the second opening stage in which the automatic door opener and the door body are separated from the drive, and the third opening stage in which the door body moves under the action of inertia; the conjugate gear set is in the initial state to the end of the second opening stage The transmission ratio of the conjugate gear set first gradually increases and then gradually decreases, wherein the maximum point of the transmission ratio of the conjugate gear set falls in the first opening stage. 8. The automatic door opening device according to claim 7, characterized in that: the conjugate gear set includes two non-circular gears, one of which is driven by the driving source member, and the other non-circular gear is connected to the above-mentioned One of the non-circular gears is conjugated, and the dial is coaxial with the other non-circular gear. 9. The automatic door opening device according to claim 1, characterized in that: the driving source component comprises a motor fixedly arranged in the base, and a gear set arranged at the output end of the motor. 10. A refrigerator, comprising a box body with a compartment, a drawer arranged on the box body, and a door body for opening or closing the compartment, it is characterized in that: the refrigerator is provided with a device such as The automatic door opening device described in any one of claims 1 to 9.