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 and improve user experience. The automatic door opening and closing mechanism comprises a hinge spring system, the hinge spring system comprises a hinge assembly, a first pull rope connected with the hinge assembly and a spring used for being connected with a box frame, and the spring is connected to the first pull rope and used for applying tension moment balanced with gravity moment to a door body assembly; the pull rope driving system comprises a driving motor, a second pull rope and a third pull rope, the driving motor is used for being installed on the box frame, the second pull rope is connected with the first pull rope or the spring, the third pull rope is used for being connected with the door body assembly, and the second pull rope and the third pull rope are wound around the output end of the driving motor in the opposite directions; and when the second pull rope is loosened or tightened under the driving of the driving motor, the third pull rope is correspondingly tightened or loosened under the driving of the driving motor, so that the tension moment applied to the door body assembly is increased or reduced, and the moment balance state is broken.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to an automatic door opening and closing mechanism and door box device. Background Technology

[0002] Door-mounted appliances such as built-in dishwashers are common household appliances. Typically, these appliances automatically open and close their doors using a push-rod mechanism on top of the appliance. However, existing push-rod mechanisms have several drawbacks. First, the push-rod extends too far after pushing the door open, affecting aesthetics. Second, the existing mechanism is limited to a small angle range for automatic opening and closing; the remaining angles still require manual operation, which often involves overcoming significant lock force, resulting in a poor user experience. Furthermore, during automatic closing, the push-rod mechanism in existing systems is usually rigidly connected to the lock to pull the door shut. If the user's hand is positioned between the door and the appliance at this point, it could easily pinch their hand, posing a significant safety hazard. Utility Model Content

[0003] Therefore, it is necessary to address the problems of existing push rod mechanisms that can only achieve automatic door opening and closing within a small angle range, resulting in poor user experience and safety hazards. This utility model provides an automatic door opening and closing mechanism and door box device that can achieve automatic door opening and closing at all angles, improving user experience and enhancing safety performance.

[0004] In one embodiment of this application, the present invention provides an automatic door opening and closing mechanism for being disposed between a housing frame and a door assembly, comprising:

[0005] A hinge spring system includes a hinge assembly for rotatably mounting the door assembly to the housing frame, a first pull cord connected to the hinge assembly, and a spring connected to the housing frame, the spring being connected to the first pull cord for applying a pulling torque to the door assembly that balances the gravitational torque of the door assembly; and

[0006] The pull-cord drive system includes a drive motor for mounting on the housing frame, a second pull cord connected to the first pull cord or the spring, and a third pull cord for connecting to the door assembly. The second pull cord and the third pull cord are wound around the output end of the drive motor in opposite directions. When the second pull cord is relaxed or tightened under the drive of the drive motor, the third pull cord is correspondingly tightened or relaxed under the drive of the drive motor, thereby increasing or decreasing the pulling torque applied to the door assembly to break the torque balance state.

[0007] According to one embodiment of this application, the drive motor includes a motor body and a first output shaft and a second output shaft that are drivenly connected to the motor body; the second pull rope is wound around the first output shaft in a clockwise direction, and the third pull rope is wound around the second output shaft in a counterclockwise direction.

[0008] According to one embodiment of this application, the first output shaft and the second output shaft are coaxially arranged on opposite sides of the motor body.

[0009] According to one embodiment of this application, the hinge assembly includes a hinge base for fixed connection with the box frame, a hinge bracket for fixed connection with the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the two ends of the first pull rope are respectively limited and connected to the hinge bracket and the spring, and the two ends of the third pull rope are respectively limited and connected to the hinge bracket and the output end of the drive motor.

[0010] According to one embodiment of this application, the second pull rope is fixedly connected to the first pull rope at a portion adjacent to the spring via a rope connecting block.

[0011] According to one embodiment of this application, the hinge spring system further includes a roller assembly for mounting on the housing frame, the roller assembly being arranged between the spring and the hinge bracket, the first pull cord and the second pull cord passing around the roller assembly such that the direction of the tension force applied by the first pull cord and the second pull cord to the spring is always consistent with the axial direction of the spring.

[0012] According to one embodiment of this application, the roller assembly includes an adjusting roller arranged adjacent to the axis of the spring and a fixed roller arranged adjacent to the hinge bracket; a first pull rope extends from the spring, passing successively around the adjusting roller and the fixed roller to the hinge bracket; a second pull rope extends from the rope connecting block around the adjusting roller to the output end of the drive motor.

[0013] According to one embodiment of this application, the pull rope drive system further includes a guide roller for mounting on the housing frame, the guide roller being arranged adjacent to the hinge bracket, and the third pull rope extending from the output end of the drive motor, first passing around the guide roller to the hinge bracket.

[0014] According to one embodiment of this application, the drive motor has a built-in Hall sensor; the automatic door opening and closing mechanism further includes a door lock assembly disposed between the door assembly and the housing frame and a position sensor disposed on the hinge bracket; the door lock assembly has a lock state and an unlock state that can be automatically switched between each other, and issues a closing completion signal when switching from the unlock state to the lock state.

[0015] According to another aspect of this application, one embodiment of this application further provides a door box device, including:

[0016] Box frame;

[0017] Door components; and

[0018] The automatic door opening and closing mechanism described above is disposed between the housing frame and the door assembly.

[0019] In summary, when the door needs to be closed, the pull-cord drive system of this application only needs to loosen the second pull cord and tighten the third pull cord by driving the motor, so that the pulling torque M2 applied to the door assembly increases to be greater than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state to achieve automatic closing; when the door needs to be opened, the pull-cord drive system of this application also only needs to tighten the second pull cord and loosen the third pull cord by driving the motor, so that the pulling torque M2 applied to the door assembly decreases to be less than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state to achieve automatic opening.

[0020] Furthermore, since the pull rope drive system in the automatic door opening and closing mechanism of this application is only used to break the torque balance, the drive motor in the pull rope drive system only needs to output a small torque to break the torque balance, which helps to reduce the power requirements of the drive motor and improve feasibility. Attached Figure Description

[0021] Figure 1A A schematic diagram showing the curves of the tension torque applied to the hinge spring system and the gravitational torque of the door assembly as a function of the door opening angle;

[0022] Figure 1B A schematic diagram showing the ratio of the tension torque applied to the hinge spring system to the gravitational torque of the door assembly as a function of the door opening angle;

[0023] Figure 2 This is a perspective view of a door box device according to an embodiment of this application;

[0024] Figure 3 A schematic diagram of the structure of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0025] Figure 4 An enlarged schematic diagram of the drive motor in the automatic door opening and closing mechanism according to the above embodiments of this application is shown;

[0026] Figure 5 A schematic diagram showing the door assembly in a closed state in the door box device according to the above embodiments of this application is shown.

[0027] Figure 6 A schematic diagram showing the door assembly in the open state of the door box device according to the above embodiments of this application is shown.

[0028] Key component symbols: 1. Automatic door opening and closing mechanism; 10. Hinge spring system; 11. Hinge assembly; 111. Hinge base; 112. Hinge bracket; 113. Rotating shaft; 12. First pull rope; 13. Spring; 14. Roller assembly; 141. Adjusting roller; 142. Fixed roller; 20. Pull rope drive system; 21. Drive motor; 211. Motor body; 212. First output shaft; 213. Second output shaft; 22. Second pull rope; 23. Third pull rope; 24. Rope connecting block; 25. Guide roller; 30. Door lock assembly; 40. Position sensor; 2. Box frame; 3. Door assembly.

[0029] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this utility model. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] In some door frame devices, the suspension and non-suspended position of the door assembly are achieved by balancing or differentiating the torque generated by a hinge spring system with the door's weight torque. This hinge spring system mainly consists of a spring, a cord, and a hinge. The hinge is positioned between the frame and the door assembly, allowing the door assembly to pivot relative to the frame to change the door angle. The spring connects to the hinge via the cord to apply torque to the hinge. As the door angle changes, the weight G of the door assembly remains constant, but the lever arm Lg changes, causing the gravitational torque M1 = G * Lg to change with the door angle. Simultaneously, the tension in the cord changes with the door angle, causing the tension F exerted by the spring on the hinge through the cord and the lever arm Lf of the cord to both change. Therefore, the tension torque M2 = F * Lf also changes with the door angle.

[0036] Thus, by designing the hinge spring system parameters, it is generally possible to achieve M2≈M1 except for small angles, with its curve roughly varying with the door opening angle as shown in the figure. Figure 1A and 1BAs shown: In areas outside the small angle, the existing hinge spring system can already achieve M2≈M1. The small difference can be compensated by friction to achieve torque balance hovering outside the small angle; while torque balance hovering within the small angle can be achieved by the action of door seal and door lock.

[0037] However, while this hinge spring system can allow the door to hover at all angles, it cannot automatically open or close the door. Therefore, the applicant has designed an automatic door opening and closing mechanism and door housing device that can achieve automatic opening and closing at all angles, improving user experience and enhancing safety performance.

[0038] Specifically, see the attached document. Figures 2 to 6 As 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 spring system 10 and a pull rope drive system 20. The hinge spring system 10 includes a hinge assembly 11 for rotatably mounting the door assembly 3 to the housing frame 2, a first pull rope 12 connected to the hinge assembly 11, and a spring 13 connected to the housing frame 2. The spring 13 is connected to the first pull rope 12 and applies a pulling torque M2 to the door assembly 3 that balances the gravitational torque M1 of the door assembly 3. The pull-cord drive system 20 includes a drive motor 21 for mounting on the housing frame 2, a second pull cord 22 connected to the first pull cord 12, and a third pull cord 23 for connecting to the door assembly 3. The second pull cord 22 and the third pull cord 23 are wound around the output end of the drive motor 21 in opposite directions. When the second pull cord 22 is relaxed or tightened under the drive of the drive motor 21, the third pull cord 23 is correspondingly tightened or relaxed under the drive of the drive motor 21, thereby increasing or decreasing the pulling torque applied to the door assembly 3 to break the torque balance state and realize automatic door opening and closing.

[0040] It is worth noting that when the drive motor 21 stops driving, the tension torque M2 exerted by the first pull rope 12 and the third pull rope 23 on the door assembly 3 under the action of the spring 13 is basically equal to the gravitational torque M1 of the door assembly 3, achieving a torque balance state, so that the door assembly 3 can be suspended relative to the box frame 2. Thus, as... Figure 5 As shown, when the door needs to be closed, the pull cord drive system 20 only needs to tighten the third pull cord 23 and loosen the second pull cord 22 through the drive motor 21, so that the pulling torque on the door assembly 3 increases, thereby breaking the torque balance state and realizing automatic closing; as Figure 6 As shown, when the door needs to be opened, the pull-cord drive system 20 only needs to loosen the third pull cord 23 and tighten the second pull cord 22 through the drive motor 21, so that the tension torque on the door assembly 3 is reduced, thereby breaking the torque balance state and realizing automatic door opening. In other words, the pull-cord drive system 20 of this application only needs to tighten or loosen the pull cord through the drive motor 21 to change the magnitude of the tension torque on the door assembly 3, thereby disrupting the original torque balance state and realizing the automatic opening and closing of the door box device.

[0041] For example, such as Figure 3 and Figure 4 As shown, the drive motor 21 may include a motor body 211 and a first output shaft 212 and a second output shaft 213 drivenly connected to the motor body 211. The second pull rope 22 is wound clockwise around the first output shaft 212, and the third pull rope 23 is wound counterclockwise around the second output shaft 213. Thus, when the motor body 211 drives the first output shaft 212 and the second output shaft 213 to rotate clockwise synchronously, the second pull rope 22 is released to relax, and the third pull rope 23 is wound up to tighten, thereby increasing the tensile torque M2 applied to the door assembly 3; when the motor body 211 drives the first output shaft 212 and the second output shaft 213 to rotate counterclockwise synchronously, the third pull rope 23 is released to relax, and the second pull rope 22 is wound up to tighten, thereby decreasing the tensile torque M2 applied to the door assembly 3. It is understood that although the drive motor 21 is implemented as a dual-head drive motor, i.e., having two output shafts, in other examples of this application, the drive motor 21 can also be implemented as a single-head drive motor, i.e., having only one output shaft. In this case, it is only necessary to wrap the second pull rope 22 and the third pull rope 23 alternately and oppositely around the output shaft. This application will not elaborate further on this.

[0042] Optionally, such as Figure 3 and Figure 4As shown, the first output shaft 212 and the second output shaft 213 are coaxially arranged on opposite sides of the motor body 211 to physically separate the second pull rope 22 and the third pull rope 23, so as to avoid interference between the second pull rope 22 and the third pull rope 23 during winding and unwinding.

[0043] It is worth noting that the spring 13 can be, but is not limited to, a tension spring, with its two ends respectively connected to the housing frame 2 and the first pull rope 12. Thus, the first pull rope 12 applies a tensile torque to the door assembly 3 under the tension of the tension spring. It is understood that in other examples of this application, the spring 13 can also be implemented as a compression spring, as long as it can provide elastic force to achieve torque balance; this application will not elaborate further on this.

[0044] Optionally, such as Figures 2 to 6 As shown, the hinge assembly 11 includes a hinge base 111 for fixed connection with the housing frame 2, a hinge bracket 112 for fixed connection with the door assembly 3, and a pivot 113 rotatably connecting the hinge bracket 112 to the hinge base 111. The two ends of the first pull rope 12 are respectively limited and connected to the hinge bracket 112 and the free end of the spring 13; the two ends of the third pull rope 23 are respectively limited and connected to the hinge bracket 112 and the output end of the drive motor 21. It is understood that the free end of the spring 13 mentioned in this application refers to the end of the spring 13 that is not connected to the housing frame 2. Furthermore, the limiting connection mentioned in this application may include, but is not limited to, fixed connections, sleeve connections, and hook connections, which will not be elaborated upon further in this application.

[0045] Preferably, such as Figure 2 and Figure 3 As shown, the second pull rope 22 can be fixedly connected to the first pull rope 12 near the spring 13 via the rope connecting block 24, so as to reserve a sufficiently long deformation space for the spring 13. It is understood that in other examples of this application, the second pull rope 22 can also be directly connected to the spring 13 in the same way as the first pull rope 12, which will not be described in detail here.

[0046] It is worth noting that during the opening and closing of the door, the hinge bracket 112 rotates around the pivot 113 along with the door assembly 3, causing the first pull rope 12 to change with the opening and closing of the door. This results in the spring 13 easily swinging significantly with the opening and closing of the door, requiring a sufficiently large installation space. To solve this problem, such as... Figures 2 to 6As shown, the hinge spring system 10 of this application may further include a roller assembly 14, which is installed on the housing frame 2 and arranged between the spring 13 and the hinge bracket 112. The first pull rope 12 and the second pull rope 22 pass around the roller assembly 14 to change the direction of the pull ropes, so that the direction of the tension applied by the first pull rope 12 and the second pull rope 22 to the spring 13 is always consistent with the axial direction of the spring 13, preventing the spring 13 from tilting.

[0047] Optionally, such as Figure 2 and Figure 3 As shown, the roller assembly 14 may include an adjusting roller 141 arranged along the axis adjacent to the spring 13 and a fixed roller 142 arranged adjacent to the hinge bracket 112. The first pull rope 12 extends from the spring 13, passing successively around the adjusting roller 141 and the fixed roller 142, to the hinge bracket 112. The second pull rope 22 extends from the rope connecting block 24, passing around the adjusting roller 141, to the output end of the drive motor 21. In this way, the first pull rope 12 first passes around the adjusting roller 141 arranged near the axis of the spring 13 and then turns, and then passes around the fixed roller 142 arranged near the hinge bracket 112 to connect to the hinge bracket 112; the second pull rope 22 first passes around the adjusting roller 141 arranged near the axis of the spring 13 and then turns, and then connects to the output end of the drive motor 21. This not only ensures that the spring 13 is only subjected to the same force as the axis of the spring 13, preventing the spring 13 from tilting, but also increases the tension arm of the first pull rope 12, which helps to reduce the elasticity requirement of the spring 13.

[0048] In addition, such as Figure 2 and Figure 3 As shown, the pull cord drive system 20 of this application may further include a guide roller 25 for mounting on the housing frame 2. The guide roller 25 is arranged adjacent to the hinge bracket 112. The third pull cord 23 extends from the output end of the drive motor 21, first passing around the guide roller 25 to the hinge bracket 112, so that the lever arm of the third pull cord 23 applying a pulling force to the hinge bracket 112 is longer, so as to increase the pulling torque applied to the hinge bracket 112 and better realize automatic closing.

[0049] According to the above embodiments of this application, as Figure 2 , Figure 5 as well as Figure 6As shown, the automatic door opening and closing mechanism 1 may further include a door lock assembly 30 disposed between the door assembly 3 and the housing frame 2. The door lock assembly 30 has a lock state and an unlock state that can be automatically switched between each other, so as to releasably lock the door assembly 3 to the housing frame 2. In this way, when it is necessary to open the door, the door opening signal will trigger the door lock assembly 30 to automatically switch from the locked state to the unlocked state to issue an unlock signal; at this time, the drive motor 21 in the pull rope drive system 20 is triggered to relax the third pull rope 23 and tighten the second pull rope 22, so that the tension torque on the door assembly 3 is reduced, the torque balance is disrupted, thereby realizing automatic door opening.

[0050] Similarly, when the door needs to be closed, the closing signal will trigger the drive motor 21 to reverse and tighten the third pull rope 23 and loosen the second pull rope 22, so that the tension torque on the door assembly 3 increases, disrupting the torque balance, thereby realizing automatic closing.

[0051] It is worth noting that since the door lock assembly 30 is usually located at the top of the housing frame 2, and the hinge assembly 11 is usually located at the bottom of the housing frame 2, the door lock arm of the door lock assembly 30 is usually large. Therefore, the door assembly 3 requires a relatively large pulling torque at the end of closing. However, the automatic door opening and closing mechanism 1 of this application actively applies a large pulling torque to the door assembly 3 by means of the third pull rope 23 in the pull rope drive system 20, which can effectively overcome the resistance torque of the door lock assembly 30 and make it easier to achieve automatic closing.

[0052] Furthermore, although the opening and closing speed of the door assembly 3 needs to be controlled to ensure safety during the opening and closing process (i.e., opening or closing the door), the automatic door opening and closing mechanism 1 of this application only needs to control the rotation speed of the drive motor 21 to control the opening and closing speed of the door assembly 3.

[0053] For example, during the opening process of door assembly 3: Figure 5 and Figure 6 As shown, when the drive motor 21 stops rotating, the length of the third pull rope 23 between the drive motor 21 and the hinge bracket 112 remains unchanged. At this time, the door assembly 3 stops opening and remains in the suspended position; Figure 6As shown, when the drive motor 21 continues to rotate forward to release the third pull rope 23, the second pull rope 22 is wound up to shorten the length between the drive motor 21 and the rope connecting block 24, causing the tension torque applied by the first pull rope 12 to the door assembly 3 to tend to decrease. As the door assembly 3 opens, the length of the first pull rope 12 between the hinge bracket 112 and the spring 13 remains constant. Although the spring 13 extends, under the action of the second pull rope 22, the tension torque M2 on the door assembly 3 is less than the gravitational torque M1, achieving a slow opening of the door assembly 3. Furthermore, controlling the forward rotation speed of the drive motor 21 controls the opening speed of the door assembly 3. Similarly, during the closing process, the automatic door opening and closing mechanism 1 of this application only needs to control the reverse rotation speed of the drive motor 21 to control the closing speed of the door assembly 3.

[0054] According to the above embodiments of this application, the number of automatic door opening and closing mechanisms 1 in each door box device can be one or two, to automatically open or close a single door assembly. For example, in one example of this application, two automatic door opening and closing mechanisms 1 can be located on the left and right sides of the door assembly 3 respectively, to cooperate in realizing automatic door opening and closing; or, in another example of this application, an automatic door opening and closing mechanism 1 and a hinge spring system can be arranged on the left and right sides of the door assembly 3 respectively, so that automatic door opening and closing can also be realized through the cooperation of the two, which will not be described in detail in this application.

[0055] It is worth noting that when the door assembly 3 is closed, the door lock assembly 30 is triggered to switch from the unlocked state to the locked state and issue a locking signal to securely lock the door assembly 3. At this time, the pull rope drive system 20 can control the drive motor 21 to stop rotating based on the locking signal so that the door assembly 3 remains in the closed state.

[0056] Furthermore, during the automatic door opening process, in order to accurately detect whether the door assembly 3 has rotated to the open state, such as... Figures 2 to 6 As shown, the automatic door opening and closing mechanism 1 of this application may further include a position sensor 40 that can be installed on the hinge bracket 112 to sense the door opening position of the hinge bracket 112; that is, when the door assembly 3 rotates to the open position, the position sensor 40 sends an open position signal, thereby controlling the drive motor 21 to stop rotating so that the hinge bracket 112 stays in the open position, thereby keeping the door assembly 3 in the open position.

[0057] It is worth noting that the drive motor 21 in the rope drive system 20 of this application can be controlled by a control board (not shown in the figure) to rotate forward and backward to tighten or loosen the second rope 22, and simultaneously loosen or tighten the third rope 23. The drive motor 21 can be equipped with a Hall sensor (not shown in the figure) to detect the rotational speed of the output shaft, thereby sensing the change in the magnitude of the motor load in order to implement safety precautions.

[0058] Furthermore, due to safety considerations, the automatic door opening and closing speed is relatively slow. However, some users may want to quickly retrieve or place tableware, leading to situations where manual intervention is often necessary during the automatic door opening and closing process. For example, if a user manually intervenes during the automatic door opening and closing process, such as by pushing or pulling the door assembly 3, the load force on the drive motor 21 via the third pull rope 23 changes. The Hall sensor detects this change in motor speed and determines the user's intention: when the user's intervention is in the same direction as the motor's drive direction (positive intervention), it increases the speed of the drive motor 21, allowing for faster door opening and closing; when the user's intervention is in the opposite direction (reverse intervention), it decreases the speed of the drive motor 21, slowing down the door opening and closing.

[0059] In other words, when the user intervenes in the same direction, the Hall sensor will detect an increase in rotation speed; when the user intervenes in the opposite direction, the Hall sensor will detect a decrease in rotation speed. Based on this, this application can quickly identify the user's intervention intention while ensuring safety, and react accordingly: if the intervention is in the same direction, the original action logic continues; if the intervention is in the opposite direction, the original action stops, and then the reverse action logic is implemented. The action logic is relatively simple, so as to improve the intelligent experience and enhance the user experience.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An automatic door opening and closing mechanism, used to be installed between the box frame and the door assembly, characterized in that, include: A hinge spring system includes a hinge assembly for rotatably mounting the door assembly to the housing frame, a first pull cord connected to the hinge assembly, and a spring connected to the housing frame, the spring being connected to the first pull cord for applying a pulling torque to the door assembly that balances the gravitational torque of the door assembly. and The pull-cord drive system includes a drive motor for mounting on the housing frame, a second pull cord connected to the first pull cord or the spring, and a third pull cord for connecting to the door assembly. The second pull cord and the third pull cord are wound around the output end of the drive motor in opposite directions. When the second pull cord is relaxed or tightened under the drive of the drive motor, the third pull cord is correspondingly tightened or relaxed under the drive of the drive motor, thereby increasing or decreasing the pulling torque applied to the door assembly to break the torque balance state.

2. The automatic door opening and closing mechanism according to claim 1, characterized in that, The drive motor includes a motor body and a first output shaft and a second output shaft that are drivenly connected to the motor body; the second pull rope is wound around the first output shaft in a clockwise direction, and the third pull rope is wound around the second output shaft in a counterclockwise direction.

3. The automatic door opening and closing mechanism according to claim 2, characterized in that, The first output shaft and the second output shaft are coaxially arranged on opposite sides of the motor body.

4. The automatic door opening and closing mechanism according to any one of claims 1 to 3, characterized in that, The hinge assembly includes a hinge base for fixed connection with the box frame, a hinge bracket for fixed connection with the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the two ends of the first pull rope are respectively limited and connected to the hinge bracket and the spring, and the two ends of the third pull rope are respectively limited and connected to the hinge bracket and the output end of the drive motor.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that, The second pull rope is fixedly connected to the first pull rope near the spring via a rope connecting block.

6. The automatic door opening and closing mechanism according to claim 5, characterized in that, The hinge spring system further includes a roller assembly for mounting on the housing frame, the roller assembly being arranged between the spring and the hinge bracket, the first pull cord and the second pull cord passing around the roller assembly such that the direction of the tension force applied by the first pull cord and the second pull cord to the spring is always consistent with the axial direction of the spring.

7. The automatic door opening and closing mechanism according to claim 6, characterized in that, The roller assembly includes an adjusting roller arranged adjacent to the axis of the spring and a fixed roller arranged adjacent to the hinge bracket; the first pull rope extends from the spring, passing successively around the adjusting roller and the fixed roller to the hinge bracket; the second pull rope extends from the rope connecting block, passing around the adjusting roller to the output end of the drive motor.

8. The automatic door opening and closing mechanism according to claim 7, characterized in that, The pull rope drive system further includes a guide roller for mounting on the housing frame, the guide roller being arranged adjacent to the hinge bracket, and the third pull rope extending from the output end of the drive motor, first passing around the guide roller to the hinge bracket.

9. The automatic door opening and closing mechanism according to claim 4, characterized in that, The drive motor has a built-in Hall sensor; the automatic door opening and closing mechanism further includes a door lock assembly disposed between the door assembly and the housing frame and a position sensor disposed on the hinge bracket; the door lock assembly has a lock state and an unlock state that can be automatically switched between each other, and issues a closing completion signal when switching from the unlock state to the lock state.

10. A door-mounted equipment, characterized in that, include: Box frame; Door components; as well as The automatic door opening and closing mechanism as described in any one of claims 1 to 9, wherein the automatic door opening and closing mechanism is disposed between the housing frame and the door assembly.

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