Automatic door opening and closing mechanism and door box equipment

Abstract

The utility model relates to an automatic door opening and closing mechanism and door box equipment, which can realize full-angle automatic door opening and closing, improve user experience and improve safety performance. The automatic door opening and closing mechanism comprises a hinge assembly and a door closing assembly, wherein the hinge assembly comprises a hinge base, a hinge bracket, a rotating shaft for rotatably connecting the hinge bracket to the hinge base and a hinge pulley arranged on the hinge bracket; the elastic driving assembly comprises a pull rope wound around the hinge pulley, a driving mechanism connected with one end of the pull rope and an elastic piece connected with the other end of the pull rope, the driving mechanism is arranged on the hinge support, and the elastic piece is used for being arranged on the box body frame; and a tension moment opposite to the gravity moment of the door body assembly in direction is applied to the hinge bracket through the pull rope.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home appliances, in particular to an automatic door opening and closing mechanism and a door box device. BACKGROUND

[0002] Door box devices such as built-in dishwashers are now commonly used household appliances. In general, the automatic opening and closing of the door of a door box device is achieved by a push rod mechanism on the top of the device pushing and pulling the door body. However, on the one hand, after the push rod pushes out the door body, the push rod extends too long, affecting the appearance; on the other hand, the existing push rod mechanism is limited by the form of the push rod and can only achieve automatic opening and closing of the door within a small angle range, and the remaining angles still need to be completed manually by the user, and when manually opening and closing the door, the user often needs to overcome a large door lock force, resulting in poor user experience. In addition, in the automatic closing process, the push rod in the existing push rod mechanism is usually hard connected with the door lock to pull the door body to close the door, and if the user's hand is located between the door body and the box body at this time, the user's hand is easy to be pinched, and there is a great safety hazard. SUMMARY

[0003] Therefore, it is necessary to solve the problems of the existing push rod mechanism that can only achieve automatic opening and closing of the door within a small angle range, poor user experience, and safety hazards, and the utility model provides an automatic door opening and closing mechanism and a door box device, which can achieve automatic opening and closing of the door within a full angle range, improve user experience, and improve safety performance.

[0004] In one embodiment of the present application, the utility model provides an automatic door opening and closing mechanism for being arranged between a box frame and a door body assembly, comprising:

[0005] a hinge assembly comprising a hinge base for fixed connection with the box frame, a hinge support for fixed connection with the door body assembly, a rotating shaft for rotatably connecting the hinge support to the hinge base, and a hinge pulley arranged on the hinge support; and

[0006] an elastic driving assembly comprising a pull rope passing through the hinge pulley, a driving mechanism connected with one end of the pull rope, and an elastic member connected with the other end of the pull rope, the driving mechanism being arranged on the hinge support, and the elastic member being arranged on the box frame to exert a pulling moment on the hinge support opposite to the gravitational moment of the door body assembly through the pull rope;

[0007] When the pull rope is tightened under the driving of the driving mechanism, the pulling moment exerted by the pull rope increases to be greater than the gravitational moment of the door body assembly, and the door is automatically closed; when the pull rope is loosened under the driving of the driving mechanism, the pulling moment exerted by the pull rope decreases to be less than the gravitational moment of the door body assembly, and the door is automatically opened.

[0008] According to one embodiment of the present application, the driving mechanism comprises a transmission gear shaft rotatably arranged on the hinge support and a driving motor connected to the transmission gear shaft, and the pull rope is wound around the transmission gear shaft so as to release or wind up the pull rope by corresponding rotation of the transmission gear shaft through forward and reverse rotation of the driving motor.

[0009] According to one embodiment of the present application, the driving motor is a winch mounted on the hinge support, and an output wheel of the winch is engaged with the transmission gear shaft.

[0010] According to one embodiment of the present application, the driving motor is internally provided with a Hall sensor.

[0011] According to one embodiment of the present application, the transmission gear shaft is located between the hinge pulley and the rotating shaft.

[0012] According to one embodiment of the present application, the elastic member is a tension spring, one end of which is connected to the box frame in position, and the other end of which is connected to the pull rope in position.

[0013] According to one embodiment of the present application, the elastic driving assembly further comprises a guide roller mounted on the box frame, the guide roller being arranged adjacent to the hinge base, and the pull rope passes through the guide roller and the hinge pulley in sequence from the tension spring to the transmission gear shaft.

[0014] According to one embodiment of the present application, the automatic door opening and closing mechanism further comprises a door lock assembly arranged between the door body assembly and the box frame, the door lock assembly having a locking state and an unlocking state which can be automatically switched to each other, and sending a door closing completion signal when switching from the unlocking state to the locking state.

[0015] According to one embodiment of the present application, the automatic door opening and closing mechanism further comprises a hovering micro switch triggered by the hinge support in a hovering position and an opening micro switch triggered by the hinge support in an opening position.

[0016] According to another aspect of the present application, one embodiment of the present application further provides a door box device, comprising:

[0017] a box frame;

[0018] a door body assembly; and

[0019] the automatic door opening and closing mechanism as described above, the automatic door opening and closing mechanism being arranged between the box frame and the door body assembly.

[0020] In summary, when the door needs to be closed, the elastic driving assembly of the present application only needs to be tightened by the driving mechanism to make the pulling force moment M2 exerted by the elastic driving assembly greater than the gravitational moment M1 of the door body assembly, so as to break the moment balance state and realize automatic closing of the door; when the door needs to be opened, the elastic driving assembly of the present application only needs to be loosened by the driving mechanism to make the pulling force moment M2 exerted by the elastic assembly smaller than the gravitational moment M1 of the door body assembly, so as to break the moment balance state and realize automatic opening of the door. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1A A curve diagram showing the pulling force moment exerted by the hinge tension spring system and the gravitational moment of the door body assembly varying with the door opening angle;

[0022] Figure 1B A curve diagram showing the ratio between the pulling force moment exerted by the hinge tension spring system and the gravitational moment of the door body assembly varying with the door opening angle;

[0023] Figure 2 A perspective view of a door box device according to an embodiment of the present application;

[0024] Figure 3 A state diagram showing the door body assembly in a closed state in the door box device according to the above embodiment of the present application;

[0025] Figure 4 A state diagram showing Figure 3 An enlarged diagram of part A in the door box device shown;

[0026] Figure 5 A state diagram showing the door body assembly in an open state in the door box device according to the above embodiment of the present application;

[0027] Figure 6 A state diagram showing Figure 5 An enlarged diagram of part B in the door box device shown.

[0028] Main element symbol explanation: 1, automatic opening and closing mechanism; 10, hinge assembly; 11, hinge base; 12, hinge support; 13, rotating shaft; 14, hinge pulley; 20, elastic driving assembly; 21, pulling rope; 22, driving mechanism; 221, transmission gear shaft; 222, driving motor; 23, elastic member; 230, tension spring; 24, guide roller; 40, door lock assembly; 50, door opening micro switch; 60, hovering micro switch; 2, box frame; 3, door body assembly.

[0029] The above main element symbol explanation, in combination with the drawings and the specific embodiments, further details the present application. DETAILED DESCRIPTION

[0030] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific details set forth herein without departing from the scope of the present application. It should be noted that the present application is not limited to the specific embodiments described herein and that the specific embodiments are presented for purposes of example and illustration only.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used for clarity to provide relative positional information and are not intended to denote an absolute frame of reference.

[0035] In some door box devices, the balance or difference between the torque generated by a hinge tension spring system and the gravity torque of the door body assembly is used to achieve the hovering and non-hoovering at a certain angle of the door body assembly. Such a hinge tension spring system mainly consists of a tension spring, a tension rope, and a hinge. The hinge is arranged between the box frame and the door body assembly, so that the door body assembly can pivot relative to the box frame to change the door angle. The tension spring connects the hinge through the tension rope to exert a torque on the hinge. As the door angle changes, the gravity G of the door body assembly does not change, but the gravity arm Lg changes, so that the gravity torque M1=G*Lg changes with the change of the door angle. At the same time, the tension of the tension rope changes with the change of the door angle, so that the tension F of the tension spring acting on the hinge through the tension rope and the force arm Lf of the tension rope both change, i.e. the tension torque M2=F*Lf also changes with the change of the door angle.

[0036] In this way, by designing the parameters of the hinge tension spring system, M2≈M1 can be generally achieved except for small angles, and the curve of the change of M2 with the door opening angle is as shown in Figure 1A and 1B As shown in the above two figures, in the area outside the small angle, the existing hinge tension spring system can already achieve M2≈M1, and a very small difference value can be compensated by the friction to achieve torque balance hovering except for small angles. The torque balance hovering within the small angle can be achieved by the action of the door seal and the door lock.

[0037] However, although such a hinge tension spring system can achieve full-angle hovering of the door body, it cannot achieve automatic opening or closing of the door body. Based on this, the applicant designs an automatic door opening and closing mechanism and a door box device, which can achieve full-angle automatic opening and closing of the door, improve the user experience, and improve the safety performance.

[0038] Specifically, with reference to the accompanying drawings, Figures 2 to 6As shown, one embodiment of this application provides a door cabinet device, which may include a cabinet frame 2 with an opening, a door assembly 3 for covering the opening of the cabinet frame 2, and an automatic door opening and closing mechanism 1 disposed between the cabinet frame 2 and the door assembly 3, so as to realize automatic door opening and closing at all angles. It is understood that the door cabinet device of this application may be implemented as a sink dishwasher or refrigerator, etc.; in addition, the door cabinet device of this application may also include, but is not limited to, a functional body capable of realizing functions such as washing dishes or refrigeration, which will not be elaborated here.

[0039] More specifically, such as Figures 2 to 6 As shown, the automatic door opening and closing mechanism 1 may include a hinge assembly 10 and an elastic drive assembly 20. The hinge assembly 10 includes a hinge base 11 for fixed connection to the housing frame 2, a hinge bracket 12 for fixed connection to the door assembly 3, a pivot 13 rotatably connecting the hinge bracket 12 to the hinge base 11, and a hinge pulley 14 disposed on the hinge bracket 12. The elastic drive assembly 20 includes a pull rope 21 passing over the hinge pulley 14, a drive mechanism 22 connected to one end of the pull rope 21, and an elastic element 23 connected to the other end of the pull rope 21; the drive mechanism 22 is disposed on the hinge bracket 12, and the elastic element 23 is disposed on the housing frame 2 to apply a pulling torque M2 to the hinge bracket 12 through the pull rope 21 in the opposite direction to the gravitational torque M1 of the door assembly 3.

[0040] When the pull rope 21 is tightened under the drive of the drive mechanism 22, the pulling torque M2 applied by the pull rope 21 increases to be greater than the gravitational torque M1 of the door assembly 3, and the door closes automatically; when the pull rope 21 is relaxed under the drive of the drive mechanism 22, the pulling torque M2 applied by the pull rope 21 decreases to be less than the gravitational torque M1 of the door assembly 3, and the door opens automatically.

[0041] It is worth noting that when the drive mechanism 22 stops driving, the pulling torque M2 exerted by the pull rope 21 on the door assembly 3 through the hinge bracket 12 under the action of the elastic element 23 is basically equal to the gravitational torque M1 of the door assembly 3, so as to achieve a torque balance state by means of friction, allowing the door assembly 3 to be suspended relative to the box frame 2. In this way, Figure 3 and Figure 4 As shown, when the door needs to be closed, the elastic drive component 20 only needs to tighten the pull rope 21 through the drive mechanism 22, so that the pulling torque M2 applied by the elastic drive component 20 is greater than the gravitational torque M1 of the door assembly 3, thereby breaking the torque balance state and realizing automatic closing; as Figure 5 and Figure 6As shown, when the door needs to be opened, the elastic driving assembly 20 only needs to be loosened by the driving mechanism 22, so that the pulling force moment M2 exerted by the elastic driving assembly 20 is smaller than the gravity moment M1 of the door body assembly 3, to break the moment balance state and realize automatic opening of the door. In other words, the elastic driving assembly 20 of the present application only needs to tighten or loosen the pull rope 21 by the driving mechanism 22, so as to change the pulling force exerted by the elastic driving assembly 20 on the door body assembly 3, so that the size of the pulling force moment M2 is changed, to break the original moment balance state and realize automatic opening and closing of the door box equipment.

[0042] As shown in the examples, Figure 4 and Figure 6 The driving mechanism 22 can include a transmission gear shaft 221 rotatably arranged on the hinge support 12 and a driving motor 222 drivingly connected to the transmission gear shaft 221; the pull rope 21 is partially wound on the transmission gear shaft 221, so as to be loosened or tightened by the corresponding rotation of the transmission gear shaft 221 driven by the forward and reverse rotation of the driving motor 222. It can be understood that the forward rotation of the driving motor 222 can be defined as the rotation direction for loosening the pull rope 21, and the reverse rotation of the driving motor 222 can be defined as the rotation direction for tightening the pull rope 21.

[0043] Alternatively, the driving motor 222 is implemented as a winch mounted on the hinge support 12, and the output wheel of the winch is engaged with the transmission gear shaft 221, so as to drive the transmission gear shaft 221 to rotate relative to the hinge support 12, thereby realizing loosening or tightening of the pull rope 21.

[0044] For example, as shown in the examples, Figures 3 to 6As shown, the pull rope 21 is wound on the transmission gear shaft 221 in a clockwise direction, when the driving motor 222 rotates counterclockwise, the transmission gear shaft 221 rotates clockwise, the pull rope 21 wound on the transmission gear shaft 221 will be released to relax the pull rope 21, so that the length of the pull rope between the transmission gear shaft 221 and the elastic member 23 becomes larger, so that the spring force has a tendency to decrease under the fixed opening angle of the door to reduce the pulling moment M2; when the driving motor 222 rotates clockwise, the transmission gear shaft 221 rotates counterclockwise, the pull rope 21 wound on the transmission gear shaft 221 will be wound to tighten the pull rope 21, so that the length of the pull rope between the transmission gear shaft 221 and the elastic member 23 becomes smaller, so that the spring force has a tendency to increase under the fixed opening angle of the door to increase the pulling moment M2. At this time, the forward rotation of the driving motor 222 corresponds to counterclockwise rotation, and the reverse rotation of the driving motor 222 corresponds to clockwise rotation. It can be understood that in other examples of the present application, the pull rope 21 can also be wound on the output shaft in a counterclockwise direction, at this time the forward and reverse rotation of the driving motor 222 correspond to clockwise and counterclockwise rotation respectively, which will not be described herein.

[0045] Optionally, as shown in Figure 4 and Figure 6 The transmission gear shaft 221 is located between the hinge pulley 14 and the rotating shaft 13, so as to make full use of the space on the hinge bracket 12 while making the hinge pulley 14 as far away from the rotating shaft 13 as possible, ensuring that the pull rope 21 has a longer force arm relative to the rotating shaft 13, which helps to reduce the size of the elastic force required to be provided by the elastic member 23.

[0046] Optionally, as shown in Figure 2 The elastic member 23 can be but not limited to a tension spring 230, the two ends of the tension spring 230 are respectively limitedly connected to the box frame 2 and the pull rope 21. In this way, the pull rope 21 exerts a pulling moment on the door body assembly 3 under the action of the pulling force of the tension spring 230; when the driving mechanism 22 works to wind or release the pull rope 21, the end of the tension spring 230 connected with the pull rope 21 will change position, so that the tension spring 230 elongates or shortens to change the pulling force exerted on the pull rope 21, and the pulling force exerted by the pull rope 21 on the hinge pulley 14 will also change, thereby changing the size of the pulling moment exerted on the door body assembly 3, so as to destroy the original moment balance and realize automatic opening and closing of the door. It can be understood that in other examples of the present application, the elastic member 23 can also be implemented as a compression spring, as long as it can provide an elastic force to achieve moment balance, which will not be described herein.

[0047] It is worth noting that the limiting connection mentioned in the present application can include but is not limited to fixed connection, sleeved connection and hooked connection, as long as the tension spring 230 can exert a pulling moment on the door body assembly 3 through the pulling rope 21, and the present application will not be repeated here.

[0048] In addition, during the opening and closing of the door, the hinge bracket 12 will rotate with the door body assembly 3 around the rotating shaft 13, so that the hinge pulley 14 around the pulling rope 21 will change with the opening and closing of the door, causing the tension spring 230 to easily swing greatly with the opening and closing of the door, and a large enough installation space needs to be reserved. In order to solve this problem, as shown in Figures 2 to 6 The elastic driving assembly 20 of the present application can further include a guide roller 24 for the pulling rope 21 to pass through, which is installed on the cabinet frame 2 to change the direction of the pulling rope 21, so that the pulling direction of the pulling rope 21 on the tension spring 230 is fixed and always consistent with the axis direction of the tension spring 230, preventing the tension spring 230 from swinging.

[0049] Alternatively, as shown in Figure 2 and Figure 3 The guide roller 24 is arranged adjacent to the hinge base 11, and the pulling rope 21 passes through the guide roller 24 and the hinge pulley 14 in sequence from the tension spring 230 to extend to the transmission gear shaft 221, so that the pulling force arm of the pulling rope 21 on the hinge pulley 14 always remains in a large range, which helps to reduce the tension spring force required by the tension spring 230 on the pulling rope 21, reduces the requirements on the tension spring 230, so as to reduce the cost.

[0050] It is worth noting that the automatic opening and closing door mechanism 1 of the present application can also drive the tension spring 230 to elongate or shorten by winding or releasing the pulling rope 21 through the driving mechanism 22, so that the pre-tightening extension of the tension spring 230 can be changed to adapt to the weight change of the door body assembly 3, thereby meeting the requirements of different weights of the door body on hovering.

[0051] According to the above embodiments of the present application, as shown in Figure 2 and Figure 3 The automatic opening and closing door mechanism 1 can further include a door lock assembly 40 arranged between the door body assembly 3 and the cabinet frame 2, which has a locking state and an unlocking state that can be automatically switched to each other, so as to releasably lock the door body assembly 3 to the cabinet frame 2. In this way, when the door needs to be opened, the door opening signal will trigger the door lock assembly 40 to automatically switch from the locking state to the unlocking state to send an unlocking signal; at this time, the driving mechanism 22 in the elastic driving assembly 20 is triggered to rotate in the positive direction to relax the pulling rope 21, thereby shortening the tension spring 230, so that the pulling moment M2 on the door body assembly 3 has a tendency to decrease, breaking the moment balance, thereby realizing automatic door opening.

[0052] Similarly, when the door needs to be closed, the closing signal triggers the driving mechanism 22 to reverse to tighten the pull rope 21, thereby lengthening the pull spring 230, so that the door body assembly 3 has a tendency to increase the pulling torque M2, break the moment balance, and thus achieve automatic door closing.

[0053] It is worth noting that although the opening and closing of the door body assembly 3 (i.e. opening or closing the door) needs to control the opening and closing speed of the door body assembly 3 to ensure safety, the automatic opening and closing door mechanism 1 of the present application only needs to control the rotating speed of the driving motor 222 to control the opening and closing speed of the door body assembly 3.

[0054] For example, in the process of opening the door body assembly 3: when the driving motor 222 is controlled to stop rotating or reverse, the length of the pull rope 21 between the driving gear shaft 221 and the pull spring 230 remains unchanged or decreases, and as the door body assembly 3 opens, the length of the pull rope 21 between the driving gear shaft 221 and the pull spring 230 increases, and the length of the pull rope 21 between the driving gear shaft 221 and the pull spring 230 decreases, so that the pull spring 230 is elongated to make the pull spring force have a tendency to increase, until the pulling torque M2 is substantially equal to the gravitational torque M1, the door body assembly 3 stops opening to remain in the hovering position; as shown in Figure 5 and Figure 6 When the driving motor 222 is controlled to continue rotating, the length of the pull rope 21 between the driving gear shaft 221 and the pull spring 230 increases, and as the door body assembly 3 opens, the length of the pull rope 21 between the driving gear shaft 221 and the pull spring 230 continues to increase, so that the pull spring 230 is shortened to make the pull spring force have a tendency to decrease, and the state of the pulling torque M2 being less than the gravitational torque M1 is maintained, realizing the slow opening of the door body assembly 3; and the rotating speed of the driving motor 222 is controlled, which can control the opening speed of the door body assembly 3.

[0055] Similarly, in the process of closing the door, the automatic opening and closing door mechanism 1 of the present application only needs to control the reverse rotating speed of the driving motor 222 to control the closing speed of the door body assembly 3.

[0056] According to the above embodiments of the present application, the number of automatic opening and closing door mechanisms 1 in each door box device can be one or two to automatically open or close a single door body assembly. For example, in one example of the present application, two automatic opening and closing door mechanisms 1 can be respectively located on the left and right sides of the door body assembly 3 to cooperatively realize automatic opening and closing of the door; or in another example of the present application, one automatic opening and closing door mechanism 1 and one hinge pull spring system can be respectively arranged on the left and right sides of the door body assembly 3 to also realize automatic opening and closing of the door through cooperation, and the present application will not be repeated here.

[0057] It is worth noting that when the door body assembly 3 is closed, the door lock assembly 40 will be triggered to switch from the unlocked state to the locked state to send a locking signal to lock the door body assembly 3 firmly; at this time, the elastic driving assembly 20 can control the driving mechanism 22 to stop rotating based on the locking signal, so that the door body assembly 3 remains in the closed state.

[0058] In addition, in the process of automatically opening the door, in order to accurately detect whether the door body assembly 3 is rotated to the open state, as shown in Figure 2 and Figure 5 , the automatic opening and closing mechanism 1 of the present application can further include an opening micro switch 50 capable of being triggered by the hinge bracket 12 in the open position, for sensing the open position of the hinge bracket 12; that is, when the door body assembly 3 is rotated to the open state, the hinge bracket 12 is rotated to the open position and triggers the opening micro switch 50 to send an opening in-place signal, thereby controlling the driving mechanism 22 to stop rotating so that the hinge bracket 12 stays in the open position, thereby realizing that the door body assembly 3 remains in the open state.

[0059] In particular, in the process of automatically opening and closing the door, for safety and intermediate operation considerations, as shown in Figure 2 and Figure 3 , the automatic opening and closing mechanism 1 of the present application can include one or more hovering micro switches 60 capable of being triggered by the hinge bracket 12 in the hovering position, for sensing the hovering position of the hinge bracket 12; that is, when the hinge bracket 12 is rotated to the hovering position, the hovering micro switch 60 will be triggered by the hinge bracket 12 to send a hovering signal, thereby controlling the driving mechanism 22 to stop rotating so that the pulling moment M2 exerted by the elastic driving assembly 20 and the gravitational moment M1 of the door body assembly 3 automatically reach moment balance, thereby realizing the hovering of the door body assembly 3. It can be understood that the opening micro switch 50 and the hovering micro switch 60 of the present application can be respectively installed on the box frame 2 as long as they can be triggered by the hinge bracket 12 rotated to the open position and the hovering position, respectively, and the present application will not be described again.

[0060] It is worth noting that the driving motor 222 in the elastic driving assembly 20 of the present application can be controlled by a control board (not shown in the figure) to reverse to relax or tighten the pull rope 21, and the driving motor 222 can be built-in with a Hall sensor (not shown in the figure) to detect the rotation speed of the output shaft, thereby sensing the size change of the motor load, so as to perform safety precautions.

[0061] In addition, due to safety considerations, the speed of automatic door opening is relatively slow, and some users have the demand of quickly taking and placing tableware, so manual intervention often occurs during the automatic door opening process. For example, during the automatic door opening process, if the user manually intervenes, such as pushing and pulling the door body assembly 3, which is equivalent to the load force of the driving motor 222 being changed by the pull rope 21, the Hall sensor will sense the change of the motor speed, and then judge the intention of the user intervention: when the direction of the user intervention is consistent with the direction of the motor driving the door, that is, positive intervention, which is equivalent to increasing the speed of the driving motor 222, the speed of the driving motor 222 can be controlled to speed up to speed up the opening and closing of the door; when the direction of the user intervention is inconsistent with the direction of the motor driving the door, that is, reverse intervention, which is equivalent to reducing the speed of the driving motor 222, the speed of the driving motor 222 can be controlled to slow down to slow down the opening and closing of the door.

[0062] In other words, when the user intervenes in the same direction, the Hall sensor will sense the speed-up; when the user intervenes in the opposite direction, the Hall sensor will sense the speed-down; based on this, the present application can quickly identify the user's intervention intention while ensuring safety, and make a response to the user's intervention intention: if the same direction intervention, continue the original action logic; if the reverse intervention, stop the original action, and then reverse the action logic; the action logic is relatively simple, so as to improve the intelligent experience and improve the user experience.

[0063] The technical features of the above embodiments can be combined in any way, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0064] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. An automatic door opening and closing mechanism, used to be installed between the box frame and the door assembly, characterized in that, The automatic opening and closing door mechanism comprises: a hinge assembly, which comprises a hinge base fixedly connected with the cabinet frame, a hinge support fixedly connected with the door body assembly, a rotating shaft rotatably connecting the hinge support with the hinge base, and a hinge pulley arranged on the hinge support; and a flexible driving assembly, which comprises a pull rope winding around the hinge pulley, a driving mechanism connected with one end of the pull rope, and a flexible member connected with the other end of the pull rope, the driving mechanism being arranged on the hinge support, and the flexible member being arranged on the cabinet frame to exert a pulling moment on the hinge support opposite to the gravity moment of the door body assembly through the pull rope; when the pull rope is tightened under the driving of the driving mechanism, the pulling moment exerted by the pull rope is increased to be greater than the gravity moment of the door body assembly, so that the door is automatically closed; when the pull rope is loosened under the driving of the driving mechanism, the pulling moment exerted by the pull rope is decreased to be less than the gravity moment of the door body assembly, so that the door is automatically opened.

2. The automatic door opening mechanism of claim 1, wherein, The driving mechanism comprises a transmission gear shaft rotatably arranged on the hinge support and a driving motor drivingly connected with the transmission gear shaft, and the pull rope is partially wound around the transmission gear shaft, so that the transmission gear shaft is correspondingly rotated to release or wind the pull rope through the forward and reverse rotation of the driving motor.

3. The automatic door opening mechanism of claim 2, wherein, The driving motor is a winch mounted on the hinge support, and an output wheel of the winch is engaged with the transmission gear shaft.

4. The automatic door opening mechanism of claim 3, wherein, The driving motor is internally provided with a Hall sensor.

5. The automatic door opening mechanism of claim 3, wherein, The transmission gear shaft is located between the hinge pulley and the rotating shaft.

6. The automatic door opening mechanism of claim 2, wherein, The flexible member is a tension spring, one end of which is limitingly connected with the cabinet frame, and the other end of which is limitingly connected with the pull rope.

7. The automatic door opening mechanism of claim 6, wherein, The flexible driving assembly further comprises a guide roller mounted on the cabinet frame, the guide roller being arranged adjacent to the hinge base, and the pull rope winding around the guide roller and the hinge pulley in sequence from the tension spring to the transmission gear shaft.

8. The automatic door opening mechanism according to any one of claims 1 to 7, wherein, The automatic opening and closing door mechanism further comprises a door lock assembly arranged between the door body assembly and the cabinet frame, the door lock assembly having a locking state and an unlocking state which can be automatically switched with each other, and sending a door closing completion signal when switching from the unlocking state to the locking state.

9. The automatic door opening mechanism according to any one of claims 1 to 7, wherein, The automatic opening and closing door mechanism further comprises a hovering micro switch touched by the hinge support in a hovering position and an opening micro switch touched by the hinge support in an opening position.

10. A door box apparatus, characterized by The automatic opening and closing door mechanism comprises: a cabinet frame; a door body assembly; and the automatic opening and closing door mechanism according to any one of claims 1 to 9, which is arranged between the cabinet frame and the door body assembly.

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