Automatic door opening and closing mechanism, door box equipment and automatic door opening and closing method

Abstract

The invention relates to an automatic door opening and closing mechanism, door box equipment and an automatic door opening and closing method, 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 rotating frame for rotatably arranging the hinge bracket; an elastic component; the rotation driving assembly is in driving connection with the hinge rotating frame so as to drive the hinge rotating frame to rotate among a door closing position, a hovering position and a door opening position relative to the hinge support; when the hinge rotating frame rotates from the hovering position to the door closing position, the tension moment applied by the elastic assembly is increased to be larger than the gravity moment of the door body assembly, and the door is automatically closed. When the hinge rotating frame rotates from the hovering position to the door opening position, the tension moment applied by the elastic assembly is reduced to be smaller than the gravity moment of the door body assembly, and automatic door opening is conducted.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, and in particular to an automatic door opening and closing mechanism, door box device, and automatic door opening and closing method. 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. Summary of the Invention

[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 invention provides an automatic door opening and closing mechanism, door box device, and automatic door opening and closing method that can achieve automatic door opening and closing at all angles, improve user experience, and enhance 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] The hinge assembly includes a hinge base for fixed connection with the housing frame, a hinge bracket for fixed connection with the door assembly, a pivot for rotatably connecting the hinge bracket to the hinge base, and a hinge frame for rotatably mounting the hinge bracket.

[0006] An elastic component, one end of which is connected to the housing frame and the other end of which is connected to the hinge bracket, is used to apply a tensile torque to the door assembly under its own elastic force; and

[0007] A rotary drive assembly drives the hinge frame to rotate relative to the hinge support between a closed position, a hovering position, and an open position.

[0008] When the hinge bracket rotates from the hovering position to the closed position under the drive of the rotary drive assembly, the tension torque applied by the elastic component increases to be greater than the gravitational torque of the door assembly, thus automatically closing the door; when the hinge bracket rotates from the hovering position to the open position under the drive of the rotary drive assembly, the tension torque applied by the elastic component decreases to be less than the gravitational torque of the door assembly, thus automatically opening the door.

[0009] According to one embodiment of this application, when the hinge frame is in the hovering position, the tensile torque applied by the elastic component and the gravitational torque of the door assembly achieve torque balance.

[0010] According to one embodiment of this application, the rotary drive assembly includes a drive motor, a drive gear driven by the drive motor, and a transmission gear fixed to the hinge frame, wherein the drive gear meshes with the transmission gear.

[0011] According to one embodiment of this application, the hinge frame includes a pivot arm connected to the elastic component and a pivot shaft rotatably connected to the hinge support and coaxially arranged with the drive gear, the pivot arm extending from the pivot shaft in a direction away from the pivot shaft.

[0012] According to one embodiment of this application, the pivot is arranged parallel to the rotating shaft.

[0013] According to one embodiment of this application, the automatic door opening and closing mechanism includes a sensor built into the drive motor and a micro switch externally placed on the drive motor. The sensor is used to detect a stall current signal to determine whether the hinge frame has rotated to the open position. The micro switch is used to sense the hover position and the closed position of the hinge frame, and is triggered when the hinge frame rotates to the hover position or the closed position to generate a corresponding positioning signal.

[0014] According to one embodiment of this application, the hinge frame further includes a stall block protruding from the pivot arm and corresponding to the open position, a closing protrusion protruding from the pivot arm and corresponding to the closed position, and a hovering protrusion protruding from the pivot arm and corresponding to the hovering position; when the hinge frame rotates to the open position, the stall block abuts against the hinge bracket to cause the drive motor to generate a stall current signal; when the hinge frame rotates to the closed position, the closing protrusion touches the micro switch to generate a closed position signal; when the hinge frame rotates to the hovering position, the hovering protrusion touches the micro switch to generate a hovering position signal.

[0015] According to one embodiment of this application, the elastic component includes a pull cord connected to the hinge frame and a spring for connecting to the housing frame, the pull cord being connected to the spring to apply a tension force to the hinge frame under the action of the spring.

[0016] According to one embodiment of this application, the spring is a tension spring; the two ends of the pull rope are respectively limited and connected to one end of the tension spring and the hinge frame; the elastic component further includes an adjusting screw for rotatably mounting on the housing frame and a connecting block threadedly connected to the adjusting screw, the connecting block being fixedly connected to the other end of the tension spring to adjust the preload tension of the tension spring.

[0017] According to one embodiment of this application, the automatic door opening and closing mechanism further includes a door lock assembly disposed between the door assembly and the housing frame, and an angle sensor disposed on the door assembly; 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; the angle sensor is used to detect the opening angle of the door assembly, so as to issue an opening completion signal when the door assembly is fully opened.

[0018] According to another aspect of this application, one embodiment of this application further provides a door box device, including:

[0019] Box frame;

[0020] Door components; and

[0021] The automatic door opening and closing mechanism described above is disposed between the housing frame and the door assembly.

[0022] According to another aspect of this application, one embodiment of this application further provides an automatic door opening and closing method, including the steps of:

[0023] In response to an opening signal, the rotary drive assembly in the automatic door opening and closing mechanism is controlled to drive the hinge bracket of the hinge assembly in the automatic door opening and closing mechanism to rotate from a suspended position to an open position relative to the hinge support of the hinge assembly. This reduces the tensile torque exerted by the elastic component in the automatic door opening and closing mechanism on the door assembly, making the gravitational torque of the door assembly greater than the applied tensile torque, thereby achieving automatic door opening; and

[0024] In response to a closing signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate from the hover position to the closed position relative to the hinge support, thereby increasing the tension torque applied by the elastic component to the door assembly, so that the gravitational torque of the door assembly is less than the applied tension torque, thus achieving automatic closing.

[0025] According to one embodiment of this application, the automatic door opening and closing method further includes the step of:

[0026] In response to the hover signal, the rotary drive assembly is controlled to drive the hinge frame to rotate relative to the hinge support to the hover position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, thereby achieving torque balance.

[0027] According to one embodiment of this application, the automatic door opening and closing method further includes the step of:

[0028] When the door lock component in the automatic door opening and closing mechanism is triggered by the door body component to switch from the unlocked state to the locked state, a door closing completion signal is issued.

[0029] In response to the closing completion signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate relative to the hinge support from the closed position to the hovering position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, and the torque balance is re-established.

[0030] When the angle sensor in the automatic door opening and closing mechanism detects that the door assembly is fully open, it sends an opening completion signal; and

[0031] In response to the door opening completion signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate relative to the hinge support from the door opening position to the hovering position, so that the tension torque applied by the elastic component to the door body assembly is equal to the gravitational torque of the door body assembly, and the torque balance is re-established.

[0032] In summary, when the door needs to be closed, the rotary drive assembly of this application only needs to drive the hinge frame to rotate from the hovering position to the closed position relative to the hinge bracket, so that the tensile torque M2 applied by the elastic component is greater than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state and realizing automatic closing; when the door needs to be opened, the rotary drive assembly of this application also only needs to drive the hinge frame to rotate from the hovering position to the open position relative to the hinge bracket, so that the tensile torque M2 applied by the elastic component is less than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state and realizing automatic opening.

[0033] Furthermore, since the lever arm of the elastic component connected to the pivot arm in the automatic door opening and closing mechanism of this application is greater than the lever arm relative to the pivot axis than the lever arm relative to the pivot axis, when the elastic component applies a pulling force to the pivot arm, the pulling torque M2 applied by the elastic component to the door assembly through the hinge frame and the hinge bracket is greater than the pulling torque applied by the elastic component to the rotary drive assembly through the hinge frame. This helps to reduce the power requirements of the drive motor and improve feasibility. Attached Figure Description

[0034] 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;

[0035] 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;

[0036] Figure 2 This is a perspective view of a door box device according to an embodiment of this application;

[0037] Figure 3 An enlarged schematic diagram of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0038] Figure 4 An exploded view of the door box device according to the above embodiments of this application is shown;

[0039] Figure 5 A side view schematic diagram of a door box device according to the above embodiments of this application is shown;

[0040] Figure 6 It shows Figure 5 An enlarged schematic diagram of part A in the door box device shown, when the hinge frame rotates to the closed position;

[0041] Figure 7 It shows Figure 5 An enlarged schematic diagram of part A in the door box device shown, when the hinge frame rotates to the hovering position;

[0042] Figure 8 It shows Figure 5 An enlarged schematic diagram of part A in the door box device shown, when the hinge frame rotates to the open position;

[0043] Figure 9 This is a flowchart illustrating an automatic door opening and closing method according to an embodiment of this application.

[0044] Key component symbols: 1. Automatic door opening and closing mechanism; 10. Hinge assembly; 11. Hinge base; 12. Hinge bracket; 13. Rotating shaft; 14. Hinge frame; 141. Pivot arm; 142. Pivot; 143. Locking block; 144. Closing protrusion; 145. Hovering protrusion; 20. Elastic component; 21. Pull cord; 22. Spring; 220. Tension spring; 23. Roller assembly; 231. First roller; 232. Second roller; 24. Adjusting screw; 25. Connecting block; 30. Rotary drive assembly; 31. Drive motor; 32. Drive gear; 33. Transmission gear; 40. Door lock assembly; 50. Micro switch; 60. Angle sensor; 2. Box frame; 3. Door assembly.

[0045] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention 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 thorough understanding of the present invention. However, the present invention can be practiced 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 the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0050] 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.

[0051] 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.

[0052] 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 1B As 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.

[0053] 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, door housing device, and automatic door opening and closing method, which can achieve automatic door opening and closing at all angles, improving user experience and enhancing safety performance.

[0054] Specifically, see the attached document. Figures 2 to 8 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.

[0055] More specifically, such as Figures 3 to 8 As shown, the automatic door opening and closing mechanism 1 may include a hinge assembly 10, an elastic component 20, and a rotary drive assembly 30. 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 rotating frame 14 rotatably disposed on the hinge bracket 12. One end of the elastic component 20 is connected to the housing frame 2, and the other end of the elastic component 20 is connected to the hinge rotating frame 14, for applying a tensile torque M2 to the door assembly 3 under its own elastic force. The rotary drive assembly 30 is connected to the hinge frame 14 to drive the hinge frame 14 to rotate relative to the hinge bracket 12 between the closed position, the hovering position, and the open position. When the hinge frame 14 rotates from the hovering position to the closed position under the drive of the rotary drive assembly 30, the tension torque M2 applied by the elastic component 20 increases to be greater than the gravitational torque M1 of the door assembly 3, thus automatically closing the door. When the hinge frame 14 rotates from the hovering position to the open position under the drive of the rotary drive assembly 30, the tension torque M2 applied by the elastic component 20 decreases to be less than the gravitational torque M1 of the door assembly 3, thus automatically opening the door.

[0056] It is worth noting that, such as Figure 7 As shown, when the hinge bracket 14 rotates relative to the hinge support 12 to the hovering position, the tension torque M2 applied by the elastic component 20 to the door assembly 3 is approximately equal to the gravitational torque M1 of the door assembly 3, thereby achieving torque balance through friction, allowing the door assembly 3 to remain hovered relative to the box frame 2. Thus, as... Figure 6As shown, when the door needs to be closed, the rotary drive assembly 30 only needs to drive the hinge bracket 14 to rotate from the hovering position to the closed position relative to the hinge support 12, so that the tension torque M2 applied by the elastic 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 8 As shown, when the door needs to be opened, the rotary drive assembly 30 only needs to drive the hinge bracket 14 to rotate from the suspended position to the open position relative to the hinge support 12, so that the tensile torque M2 applied by the elastic component 20 is less than the gravitational torque M1 of the door assembly 3, thereby breaking the torque balance state and realizing automatic door opening. It can be understood that the rotary drive assembly 30 of this application only needs to drive the hinge bracket 14 to rotate relative to the hinge support 12 to change the tensile force and / or lever arm of the elastic component 20 applied to the door assembly 3, so that the magnitude of the tensile torque M2 can be changed, thereby breaking the original torque balance state and realizing the automatic opening and closing of the door box device.

[0057] For example, such as Figure 3 and Figure 4 As shown, the rotary drive assembly 30 may include a drive motor 31, a drive gear 32 driven by the drive motor 31, and a transmission gear 33 fixed to the hinge frame 14; the drive gear 32 meshes with the transmission gear 33. Thus, under the action of the drive motor 31, the drive gear 32 drives the transmission gear 33 to rotate relative to the hinge bracket 12, thereby causing the hinge frame 14 to rotate between the closed position, the suspended position, and the open position. It is understood that the transmission gear 33 of this application may be connected to the hinge frame 14 via a D-shaped shaft, but this will not be elaborated further.

[0058] Optionally, such as Figure 3 and Figure 4 As shown, the hinge frame 14 includes a pivot arm 141 connected to the elastic component 20 and a pivot 142 rotatably connected to the hinge bracket 12 and coaxially arranged with the drive gear 32. The pivot arm 141 extends from the pivot 142 in a direction away from the pivot shaft 13, such that the tension torque M2 exerted by the elastic component 20 on the door assembly 3 through the hinge bracket 12 is greater than the tension torque exerted by the elastic component 20 on the rotary drive assembly 30 through the hinge frame 14. This allows the drive motor 31 in the rotary drive assembly 30 to drive the hinge frame 14 to rotate and disrupt the torque balance without requiring a large power output. This reduces the requirements on the drive motor 31 and helps to reduce costs.

[0059] In other words, the pivot 142 in the hinge frame 14 of this application is located between the pivot 13 and the part of the pivot arm 141 that is connected to the elastic component 20. That is, the part of the pivot arm 141 that is connected to the elastic component 20 is located on the side of the pivot 142 away from the pivot 13. This makes the lever arm of the elastic component 20 connected to the pivot arm 141 relative to the pivot 13 greater than the lever arm relative to the pivot 142. Therefore, when the elastic component 20 applies a pulling force to the pivot arm 141, the pulling torque M2 of the elastic component 20 on the door assembly 3 through the hinge frame 14 and the hinge bracket 12 is greater than the pulling torque of the elastic component 20 on the rotary drive assembly 30 through the hinge frame 14. This helps to reduce the power requirements of the drive motor 31 and improve feasibility. It is understood that the portion of the pivot arm 141 connected to the elastic component 20 may be located at the free end of the pivot arm 141, but is not limited to the location of the pivot arm 141. As long as it is located away from the pivot 142 and the rotating shaft 13, this application will not elaborate further.

[0060] Optionally, the pivot 142 is arranged parallel to the rotating shaft 13 so that when the pivot arm 141 rotates about the pivot 142, the lever arm of the elastic component 20 relative to the pivot 142 and the tension applied by the elastic component 20 relative to the pivot arm 141 are effectively changed, thereby effectively changing the tension torque M2 applied to the door assembly 3 and improving the reliability of the automatic opening and closing door. For example, as Figure 6 As shown, when the pivot arm 141 of the hinge frame 14 rotates to the closed position, the lever arm of the elastic component 20 relative to the pivot 142 is L1, and the tension applied by the elastic component 20 to the pivot arm 141 at this time is F1; Figure 7 As shown, when the pivot arm 141 of the hinge frame 14 rotates to the suspended position, the lever arm of the elastic component 20 relative to the pivot 142 is L2, and the tension applied by the elastic component 20 to the pivot arm 141 at this time is F2; Figure 8 As shown, when the pivot arm 141 of the hinge frame 14 rotates to the open position, the lever arm of the elastic component 20 relative to the pivot 142 is L3, and the tension applied by the elastic component 20 to the pivot arm 141 at this time is F3. Figures 6 to 8 It is easy to see that L1 > L2 > L3 and F1 > F2 > F3; therefore, when the pivot arm 141 of the hinge frame 14 rotates to the closed position, the hovering position and the open position in sequence, the tension torque applied by the elastic component 20 to the door body component 3 gradually decreases.

[0061] According to the above embodiments of this application, as Figures 3 to 8As shown, the elastic component 20 may include a pull rope 21 connected to the hinge frame 14 and a spring 22 for connecting to the box frame 2. The pull rope 21 is connected to the spring 22 to apply a pulling force to the hinge frame 14 under the action of the spring 22, and then apply a pulling torque to the door assembly 3 through the hinge bracket 12.

[0062] Optionally, such as Figure 3 and Figure 4 As shown, the spring 22 can be, but is not limited to, a tension spring 220, with its two ends respectively limited and connected to the housing frame 2 and the pull rope 21. Thus, the pull rope 21 applies a tensile torque to the door assembly 3 under the tension of the tension spring 220. When the drive motor 31 operates to drive the hinge frame 14 to rotate, the position of the part of the hinge frame 14 connected to the pull rope 21 changes, causing a change in the tension and lever arm of the pull rope 21 applied to the hinge frame 14, thereby changing the magnitude of the tensile torque applied to the door assembly 3, disrupting the original torque balance, and achieving automatic door opening and closing. It is understood that in other examples of this application, the spring 22 can also be implemented as a compression spring, as long as it can apply a tensile torque to the door assembly 3 in the suspended position to achieve torque balance; this application will not elaborate further on this.

[0063] Optionally, such as Figure 3 and Figure 4 As shown, the two ends of the pull rope 21 are respectively limited and connected to one end of the tension spring 220 and the pivot arm 141 of the hinge frame 14.

[0064] It is worth noting that the limiting connection mentioned in this application may include, but is not limited to, fixed connection, sleeve connection and hook connection, as long as the tension spring 220 can apply a tension torque to the door assembly 3 through the pull rope 21. This application will not elaborate on this further.

[0065] Furthermore, during the opening and closing of the door, the hinge bracket 12 rotates around the pivot 13 along with the door assembly 3, and the pivot arm 141 also rotates around the pivot 142 relative to the hinge bracket 12. This causes the position of the connection point between the pivot arm 141 and the pull rope 21 to change with the opening and closing of the door, resulting in the tension spring 220 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 5 As shown, the elastic component 20 of this application may further include a roller assembly 23 for the pull rope 21 to pass through. The roller assembly 23 is installed on the housing frame 2 and arranged between the tension spring 220 and the hinge frame 14 to change the direction of the pull rope 21, so that the direction of the tension force applied by the pull rope 21 to the tension spring 220 remains fixed and is always consistent with the axial direction of the tension spring 220, preventing the tension spring 220 from swaying.

[0066] Optionally, such as Figure 3 and Figure 4 As shown, the roller assembly 23 may include a first roller 231 arranged along the axis of the tension spring 220 and a second roller 232 arranged along the axis of the hinge frame 14. The pull rope 21 extends from the tension spring 220, passing successively over the first roller 231 and the second roller 232, to the hinge frame 14. In this way, after passing over the first roller 231 arranged along the axis of the tension spring 220, the pull rope 21 can be connected to the tension spring 220 along the axial direction of the tension spring 220, ensuring that the tension spring 220 is only subjected to the same force as the axial direction of the tension spring 220, preventing the tension spring 220 from tilting or swaying. At the same time, after passing over the second roller 232 arranged along the axis of the hinge frame 14, the pull rope 21 can increase the tension arm of the pull rope 21, which helps to reduce the elastic force requirement of the tension spring 220.

[0067] Optionally, the first roller 231 and the second roller 232 are rotatably mounted on the housing frame 2.

[0068] Optionally, such as Figure 3 and Figure 4 As shown, the elastic component 20 may further include an adjusting screw 24 rotatably mounted on the housing frame 2 and a connecting block 25 threadedly connected to the adjusting screw 24. The connecting block 25 is fixedly connected to the other end of the tension spring 220 so that by turning the adjusting screw 24, the connecting block 25 can be driven to move along the adjusting screw 24, thereby causing the tension spring 220 to extend or shorten, so that the preload of the tension spring 220 can be changed to adapt to the weight change of the door assembly 3, thereby meeting the suspension requirements of doors of different weights. It is understood that in other examples of this application, the adjusting screw 24 and the connecting block 25 may also be correspondingly arranged between the first roller 231 and the housing frame 2, so that the first roller 231 is rotatably mounted on the housing frame 2, so that when the position is adjusted relative to the housing frame 2, it moves closer to or further away from the tension spring 220 along the axial direction of the tension spring 220, thereby changing the preload tension of the tension spring 220, and also meeting the requirements for suspension of doors of different weights. This application will not elaborate further on this.

[0069] According to the above embodiments of this application, as Figure 2 and Figure 5As shown, the automatic door opening and closing mechanism 1 may further include a door lock assembly 40 disposed between the door assembly 3 and the housing frame 2. The door lock assembly 40 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 40 to automatically switch from the locked state to the unlocked state to issue an unlock signal; at this time, the drive motor 31 in the rotary drive assembly 30 is triggered to drive the hinge frame 14 to rotate from the suspended position to the open position, and shorten the tension spring 220, so that the tension torque M2 on the door assembly 3 tends to decrease, thereby disrupting the torque balance and realizing automatic door opening.

[0070] Similarly, when the door needs to be closed, the closing signal will trigger the drive motor 31 to drive the hinge frame 14 to rotate in the opposite direction from the hovering position to the closed position, thereby stretching the tension spring 220. This causes the tension torque M2 on the door assembly 3 to tend to increase, disrupting the torque balance and thus achieving automatic closing.

[0071] It is worth noting that when the door assembly 3 is opened, the drive motor 31 in the rotary drive assembly 30 can be triggered to drive the hinge frame 14 to rotate in the opposite direction from the open position to the hovering position, thereby stretching the tension spring 220. This makes the tension torque M2 on the door assembly 3 basically equal to the gravitational torque of the door assembly 3, establishing torque balance in preparation for the next closing command.

[0072] Similarly, when the door assembly 3 is closed, the door lock assembly 40 is triggered to switch from the unlocked state to the locked state to send a locking signal; at this time, the drive motor 31 in the rotary drive assembly 30 can be triggered to drive the hinge frame 14 to rotate from the closed position to the hovering position, and shorten the tension spring 220, so that the tension torque M2 on the door assembly 3 is basically equal to the gravitational torque of the door assembly 3, establishing torque balance, and waiting for the next door opening command.

[0073] Furthermore, when the hinge frame 14 is in the hovering position, the tension torque M2 of the door assembly 3 is basically equal to the gravitational torque of the door assembly 3 to establish torque balance, so that the drive motor 31 is in standby mode; at this time, the automatic door opening and closing mechanism 1 is in manual mode, and the user can open or close the door assembly 3 at will, and the door assembly 3 can also be hovered at any angle.

[0074] 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.

[0075] It is worth noting that the drive motor 31 in the rotary drive assembly 30 of this application can be controlled by a control board (not shown in the figure) to rotate forward and backward to drive the hinge frame 14 to perform reciprocating rotation. Furthermore, the drive motor 31 can have a built-in sensor (not shown in the figure) to detect a stall current signal, thereby determining whether the hinge frame 14 has rotated to the open position. It is understood that this application can define the forward rotation of the drive motor 31 as the direction of rotation that shortens the tension spring 220, and the reverse rotation of the drive motor 31 as the direction of rotation that lengthens the tension spring 220.

[0076] Optionally, such as Figure 4 and Figure 8 As shown, the hinge frame 14 further includes a stall block 143 protruding from the pivot arm 141 and corresponding to the open position. When the hinge frame 14 rotates forward to the open position, it abuts against the hinge bracket 12 to prevent the hinge frame 14 from continuing to rotate forward. This causes the drive motor 31 to generate a stall current signal, which is received by the built-in sensor to detect the closed position. In other words, when the sensor built into the drive motor 31 detects the stall current signal, the stall block 143 protruding from the pivot arm 141 abuts against the hinge bracket 12, preventing the hinge frame 14 from continuing to rotate forward, indicating that the hinge frame 14 has rotated to the open position. At this time, based on the stall current signal, the drive motor 31 can be controlled to stop rotating so that the hinge frame 14 remains in the open position, allowing the door assembly 3 to automatically open.

[0077] Furthermore, during the automatic door opening and closing process, in order to accurately detect whether the hinge bracket 14 has rotated to the closed position and the hovering position, such as... Figures 3 to 8 As shown, the automatic door opening and closing mechanism 1 of this application may include a micro switch 50 externally mounted on the drive motor 31, used to sense the hovering position and the closing position of the hinge frame 14, and to be triggered when the hinge frame 14 rotates to the hovering position or the closing position to generate a corresponding positioning signal, thereby controlling the drive motor 31 to stop rotating so that the hinge frame 14 stops at the preset hovering position or the closing position, thereby realizing the hovering or automatic closing of the door assembly 3.

[0078] Optionally, such as Figure 3 and Figure 4 As shown, the hinge frame 14 may further include a closing protrusion 144 protruding from the pivot arm 141 and corresponding to the closed position, and a hovering protrusion 145 protruding from the pivot arm 141 and corresponding to the hovering position; the micro switch 50 is fixedly mounted to the drive motor 31, and the micro switch 50 is communicatively connected to the drive motor 31. When the hinge frame 14 rotates to the closed position, the closing protrusion 144 triggers the micro switch 50 to send a closed position signal, controlling the drive motor 31 to stop rotating so that the hinge frame 14 remains in the closed position, causing the door assembly 3 to begin automatically closing; when the hinge frame 14 rotates to the hovering position, the hovering protrusion 145 triggers the micro switch 50 to send a hovering position signal, controlling the drive motor 31 to stop rotating so that the hinge frame 14 remains in the hovering position, causing the door assembly 3 to remain in the hovering state.

[0079] It is worth noting that when the door assembly 3 is in an open or closed state relative to the box frame 2, that is, when the automatic door opening and closing mechanism 1 completes the opening or closing, the automatic door opening and closing mechanism 1 of this application will drive the hinge frame 14 to rotate back to the hovering position, so that the tension torque M2 on the door assembly 3 is basically equal to the gravitational torque of the door assembly 3 to re-establish torque balance, so that the user can open or close the door assembly 3 at will, and the door assembly 3 can also be hovered at any angle.

[0080] Optionally, the door lock assembly 40 of this application can issue a closing completion signal when switching from the unlocked state to the locked state; the rotary drive assembly 30 can drive the hinge bracket 14 to rotate relative to the hinge support 12 from the closed position to the hovering position based on the closing completion signal, so that the tension torque M2 applied by the elastic component 20 to the door body assembly 3 is basically equal to the gravitational torque M1 of the door body assembly, and the torque balance is re-established.

[0081] Optionally, such as Figures 2 to 8 As shown, the automatic door opening and closing mechanism 1 of this application may further include an angle sensor 60, which is disposed on the door assembly 3 to detect the opening angle of the door assembly 3, so as to issue an opening completion signal when the door assembly 3 is fully open; the rotary drive assembly 30 can drive the hinge bracket 14 to rotate relative to the hinge support 12 from the opening position to the hovering position based on the opening completion signal, so that the tension torque M2 applied by the elastic component 20 to the door assembly 3 is substantially equal to the gravitational torque M1 of the door assembly, and the torque balance is re-established.

[0082] It is worth mentioning that, according to another aspect of this application, such as Figure 9As shown, one embodiment of this application further provides an automatic door opening and closing method, which may include the steps of:

[0083] S100: In response to an opening signal, the rotary drive assembly in the automatic door opening and closing mechanism is controlled to drive the hinge bracket of the hinge assembly in the automatic door opening and closing mechanism to rotate from the suspended position to the open position relative to the hinge support of the hinge assembly, thereby reducing the tensile torque exerted by the elastic component in the automatic door opening and closing mechanism on the door assembly, so that the gravitational torque of the door assembly is greater than the applied tensile torque, thereby realizing automatic door opening; and

[0084] S200: In response to a door closing signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate relative to the hinge support from the hover position to the closed position, thereby increasing the tension torque applied by the elastic component to the door assembly, so that the gravitational torque of the door assembly is less than the applied tension torque, thereby achieving automatic door closing.

[0085] It is worth noting that, such as Figure 9 As shown, the automatic door opening and closing method of this application may further include the following steps:

[0086] S300: In response to the hover signal, control the rotary drive assembly to drive the hinge frame to rotate relative to the hinge support to the hover position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, thereby achieving torque balance.

[0087] Optionally, such as Figure 9 As shown in one example of this application, the automatic door opening and closing method of this application may further include the step of:

[0088] S400: When the door lock component in the automatic door opening and closing mechanism is triggered by the door body component to switch from the unlocked state to the locked state, a closing completion signal is issued; and

[0089] S500: In response to the closing completion signal, control the rotary drive assembly to drive the hinge bracket to rotate relative to the hinge support from the closed position to the hovering position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, and re-establish torque balance.

[0090] Optionally, such as Figure 9 As shown in one example of this application, the automatic door opening and closing method of this application may further include the step of:

[0091] S600: When the angle sensor in the automatic door opening and closing mechanism detects that the door assembly is fully open, it sends an opening completion signal; and

[0092] S700: In response to the door opening completion signal, control the rotary drive assembly to drive the hinge bracket to rotate relative to the hinge support from the door opening position to the hovering position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, and re-establish torque balance.

[0093] It is worth noting that S100 to S700 mentioned in this application are merely illustrative and do not represent the order of the steps; for example, in other examples of this application, step S200 can be performed before step S100, which will not be elaborated upon here.

[0094] Furthermore, the door opening signal mentioned in this application may be, but is not limited to, a signal emitted by pressing the door opening button, or an unlocking signal emitted by the door lock component when switching from the locked state to the unlocked state; the door closing signal mentioned in this application may be, but is not limited to, a signal emitted by pressing the start / pause button; and the hovering signal mentioned in this application may be, but is not limited to, a signal generated when the user manually drives the door component.

[0095] 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.

[0096] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

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: The hinge assembly includes a hinge base for fixed connection with the housing frame, a hinge bracket for fixed connection with the door assembly, a pivot for rotatably connecting the hinge bracket to the hinge base, and a hinge frame for rotatably mounting the hinge bracket. An elastic component, one end of which is connected to the box frame and the other end of which is connected to the hinge frame, is used to apply a tensile torque to the door assembly under its own elastic force; as well as A rotary drive assembly drives the hinge frame to rotate relative to the hinge support between a closed position, a hovering position, and an open position. When the hinge bracket rotates from the hovering position to the closed position under the drive of the rotary drive assembly, the tension torque applied by the elastic component increases to be greater than the gravitational torque of the door assembly, thus automatically closing the door; when the hinge bracket rotates from the hovering position to the open position under the drive of the rotary drive assembly, the tension torque applied by the elastic component decreases to be less than the gravitational torque of the door assembly, thus automatically opening the door.

2. The automatic door opening and closing mechanism according to claim 1, characterized in that, When the hinge frame is in the hovering position, the tension torque applied by the elastic component is balanced with the gravitational torque of the door assembly.

3. The automatic door opening and closing mechanism according to claim 1, characterized in that, The rotary drive assembly includes a drive motor, a drive gear driven by the drive motor, and a transmission gear fixed to the hinge frame, wherein the drive gear meshes with the transmission gear.

4. The automatic door opening and closing mechanism according to claim 3, characterized in that, The hinge frame includes a pivot arm connected to the elastic component and a pivot shaft that rotatably connects the pivot arm to the hinge bracket and is arranged coaxially with the drive gear, the pivot arm extending from the pivot shaft in a direction away from the pivot shaft.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that, The pivot is arranged parallel to the rotating shaft.

6. The automatic door opening and closing mechanism according to claim 4, characterized in that, The automatic door opening and closing mechanism includes a sensor built into the drive motor and a micro switch externally mounted on the drive motor. The sensor is used to detect the stall current signal to determine whether the hinge frame has rotated to the open position. The micro switch is used to sense the hover position and the closed position of the hinge frame, and is triggered when the hinge frame rotates to the hover position or the closed position to generate a corresponding positioning signal.

7. The automatic door opening and closing mechanism according to claim 6, characterized in that, The hinge frame further includes a stall block protruding from the pivot arm and corresponding to the open position, a closing protrusion protruding from the pivot arm and corresponding to the closed position, and a hovering protrusion protruding from the pivot arm and corresponding to the hovering position. When the hinge frame rotates to the open position, the stall block abuts against the hinge bracket to generate a stall current signal in the drive motor. When the hinge frame rotates to the closed position, the closing protrusion triggers the micro switch to generate a closed position signal. When the hinge frame rotates to the hovering position, the hovering protrusion triggers the micro switch to generate a hovering position signal.

8. The automatic door opening and closing mechanism according to any one of claims 1 to 7, characterized in that, The elastic component includes a pull cord connected to the hinge frame and a spring for connecting to the housing frame. The pull cord is connected to the spring to apply a tension force to the hinge frame under the action of the spring.

9. The automatic door opening and closing mechanism according to claim 8, characterized in that, The spring is a tension spring; the two ends of the pull rope are respectively limited and connected to one end of the tension spring and the hinge frame; the elastic component further includes an adjusting screw for rotatably mounting on the box frame and a connecting block threadedly connected to the adjusting screw, the connecting block being fixedly connected to the other end of the tension spring to adjust the preload of the tension spring.

10. The automatic door opening and closing mechanism according to any one of claims 1 to 7, characterized in that, It also includes a door lock assembly disposed between the door assembly and the housing frame, and an angle sensor disposed on the door assembly; 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; the angle sensor is used to detect the opening angle of the door assembly, so as to issue an opening completion signal when the door assembly is fully opened.

11. 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 10, wherein the automatic door opening and closing mechanism is disposed between the housing frame and the door assembly.

12. An automatic door opening and closing method, characterized in that, Including the following steps: In response to the door opening signal, the rotary drive component in the automatic door opening and closing mechanism is controlled to drive the hinge bracket of the hinge component in the automatic door opening and closing mechanism to rotate from the suspended position to the open position relative to the hinge support of the hinge component, so as to reduce the tensile torque applied by the elastic component in the automatic door opening and closing mechanism to the door body component, so that the gravitational torque of the door body component is greater than the applied tensile torque, thereby realizing automatic door opening; and In response to a closing signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate from the hover position to the closed position relative to the hinge support, thereby increasing the tension torque applied by the elastic component to the door assembly, so that the gravitational torque of the door assembly is less than the applied tension torque, thus achieving automatic closing.

13. The automatic door opening and closing method according to claim 12, characterized in that, It also includes the following steps: In response to the hover signal, the rotary drive assembly is controlled to drive the hinge frame to rotate relative to the hinge support to the hover position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, thereby achieving torque balance.

14. The automatic door opening and closing method according to claim 12 or 13, characterized in that, It also includes the following steps: When the door lock component in the automatic door opening and closing mechanism is triggered by the door body component to switch from the unlocked state to the locked state, a door closing completion signal is issued. In response to the closing completion signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate relative to the hinge support from the closed position to the hovering position, so that the tension torque applied by the elastic component to the door assembly is equal to the gravitational torque of the door assembly, and the torque balance is re-established. When the angle sensor in the automatic door opening and closing mechanism detects that the door assembly is fully open, it sends an opening completion signal. as well as In response to the door opening completion signal, the rotary drive assembly is controlled to drive the hinge bracket to rotate relative to the hinge support from the door opening position to the hovering position, so that the tension torque applied by the elastic component to the door body assembly is equal to the gravitational torque of the door body assembly, and the torque balance is re-established.

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