Automatic door opening and closing mechanism and door box equipment

Abstract

The utility model relates to an automatic door opening and closing mechanism and door box equipment, which can realize full-angle automatic door opening and closing, improve user experience and improve safety performance. The automatic door opening and closing mechanism comprises a hinge spring system, the hinge spring system comprises a hinge assembly used for rotatably installing the door body assembly on the box body frame, a pull rope used for being connected with the door body assembly and a spring used for being connected with the box body frame, and the spring is connected with the pull rope. The pull rope is used for applying tension moment balanced with gravity moment of the door body assembly to the door body assembly through the pull rope; the belt wheel driving system comprises a driving motor, a driving gear which is in driving connection with the driving motor, a driven gear which is rotatably arranged on the box body frame, a transmission belt which is sleeved on the driving gear and the driven gear, and a fixed connecting piece which is used for connecting the transmission belt with the pull rope; the tension moment applied to the door body assembly by the pull rope is increased or decreased, so that 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 pull cord for connecting to the door assembly, and a spring for connecting to the housing frame, the spring being connected to the pull cord for applying a pulling torque to the door assembly through the pull cord that balances the gravitational torque of the door assembly.

[0006] The pulley drive system includes a drive motor, a drive gear driven by the drive motor, a driven gear rotatably mounted on the housing frame, a transmission belt fitted onto the drive gear and the driven gear, and a fastener connecting the transmission belt and the pull rope, for increasing or decreasing the tension torque exerted by the pull rope on the door assembly to break the torque balance state.

[0007] According to one embodiment of this application, the transmission belt is a toothed belt that meshes with the driving gear and the driven gear.

[0008] 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 pull rope are respectively limited and connected to the hinge bracket and the spring.

[0009] 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 including an adjusting roller arranged adjacent to the axis of the spring and a fixed roller arranged adjacent to the hinge bracket, the pull cord extending from the spring, passing successively over the adjusting roller and the fixed roller, to the hinge bracket.

[0010] According to one embodiment of this application, the driven gear is arranged coaxially with the fixed roller.

[0011] According to one embodiment of this application, the automatic door opening and closing mechanism further includes a lever-assisted system, comprising a lever for mounting to the housing frame, a reset member connected to the lever, and a push block protruding from the transmission belt; the lever has a fulcrum portion for rotatably connecting to the housing frame, a power portion extending from the fulcrum portion toward the push block, and a resistance portion extending from the fulcrum portion toward the hinge bracket; when the push block approaches the lever under the drive of the transmission belt to lift the resistance portion, the power portion of the lever moves away from the hinge bracket; when the push block moves away from the lever under the drive of the transmission belt to disengage from the resistance portion, the power portion of the lever approaches to push the hinge bracket under the reset action of the reset member.

[0012] According to one embodiment of this application, the length of the power arm of the power unit is greater than the length of the resistance arm of the resistance unit.

[0013] According to one embodiment of this application, the push block and the fixing member are respectively located at the upper and lower sections of the transmission belt.

[0014] According to one embodiment of this application, the fixing member includes a rope connecting block fixedly connected to the pull rope, a belt connecting block fixedly connected to the transmission belt, and a limiting protrusion protruding from the belt connecting block; the rope connecting block is fixedly connected to the belt connecting block; the pulley drive system further includes a micro switch corresponding to the limiting protrusion; when the door is closed, the limiting protrusion touches the micro switch under the drive of the transmission belt, so as to stop the drive motor from working.

[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, on the one hand, the pulley drive system of this application only needs to apply a small force to the pull rope to change the magnitude of the pulling torque, thereby disrupting the torque balance and realizing the automatic opening and closing of the door box device. Therefore, the drive motor in the pulley drive system of this application does not need to have a large power, but only needs to provide a small driving force, which reduces the requirements for the drive motor, helps to reduce costs, and is easy to implement. On the other hand, when entering the initial stage of automatic door opening, the lever auxiliary system of this application can push the hinge bracket to overcome the problem that the gravity torque is too small to automatically open the door under the action of gravity torque, thereby assisting in door opening and realizing automatic door opening and closing at all angles.

[0020] Furthermore, since the pulley drive system of this application only needs to apply driving force to the springs in the hinge spring system, the pulley drive system of this application can be integrated within the housing frame, avoiding visibility during use, resulting in a clean and aesthetically pleasing appearance and enhancing the sense of intelligent technology. At the same time, the door housing device of this application retains the hinge spring system, so that manual opening and closing with a hovering function can still be completed even when the drive motor in the pulley drive system is not operating; that is to say, the automatic door opening and closing mechanism of this application can meet both manual and fully automatic door opening and closing needs. 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 A partially enlarged schematic diagram of the door assembly in the closed state in the door box device according to the above embodiments of this application is shown;

[0026] Figure 5A partially enlarged schematic diagram of the door assembly in the door box device according to the above embodiment of this application in the open state is shown.

[0027] 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. Pull rope; 13. Spring; 130. Tension spring; 14. Roller assembly; 141. Adjusting roller; 142. Fixed roller; 20. Belt drive system; 21. Drive motor; 22. Driving gear; 23. Driven gear; 24. Transmission belt; 240. Toothed belt; 25. Fixed connector; 251. Rope connecting block; 252. Belt connecting block; 253. Limiting protrusion; 26. Micro switch; 30. Lever auxiliary system; 31. Lever; 311. Fulcrum; 312. Power unit; 313. Resistance unit; 32. Reset component; 33. Pushing block; 40. Position sensor; 2. Box frame; 3. Door assembly.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Specifically, see the attached document. Figures 2 to 5 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.

[0037] More specifically, such as Figures 2 to 5 As shown, the automatic door opening and closing mechanism 1 may include a hinge spring system 10 and a pulley 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 pull cord 12 for connecting to the door assembly 3, and a spring 13 for connecting to the housing frame 2. The spring 13 is connected to the pull cord 12 and applies a pulling torque M2 to the door assembly 3 through the pull cord 12, which is balanced by the gravitational torque M1 of the door assembly 3, so that the door assembly 3 can be in a suspended state relative to the housing frame 2. The pulley drive system 20 includes a drive motor 21, a drive gear 22 driven by the drive motor 21, a driven gear 23 rotatably mounted on the housing frame 2, a transmission belt 24 fitted onto the drive gear 22 and the driven gear 23, and a fastener 25 connecting the transmission belt 24 and the pull rope 12. The system is used to increase or decrease the pulling torque M2 applied by the pull rope 12 to the door assembly 3 to break the torque balance and achieve automatic door opening and closing.

[0038] It is worth noting that when the door assembly 3 is suspended relative to the box frame 2, the pulling torque M2 exerted by the pull rope 12 on the door assembly 3 under the action of the spring 13 is approximately equal to the gravitational torque M1 of the door assembly 3, thus achieving torque balance through friction. Therefore, when closing the door, the pulley drive system 20 only needs to apply additional pulling force to the pull rope 12 to increase the pulling torque M2, making the pulling torque M2 greater than the gravitational torque M1, thereby achieving automatic closing; when opening the door, the pulley drive system 20 only needs to apply additional pushing force to the pull rope 12 to decrease the pulling torque M2, making the pulling torque M2 less than the gravitational torque M1, thereby achieving automatic opening.

[0039] In particular, since the pulley drive system 20 of this application only needs to apply a small force to the pull rope 12 to change the magnitude of the pulling torque M2, thereby disrupting the torque balance and realizing the automatic opening and closing of the door box device, the drive motor 21 in the pulley drive system 20 of this application does not need to have a large power. It only needs to provide a small driving force to disrupt the hovering balance. The requirements for the drive motor are low, which helps to reduce costs and facilitates implementation.

[0040] Furthermore, since the pulley drive system 20 of this application only needs to apply driving force to the pull rope 12 in the hinge spring system 10, the pulley drive system 20 of this application can be integrated into the housing frame 2, avoiding being seen by the user during use, resulting in a simple and beautiful appearance and enhancing the sense of intelligent technology. At the same time, the door housing device of this application retains the hinge spring system 10 so that manual opening and closing of the door with the hovering function can still be completed when the drive motor 21 in the pulley drive system 20 is not in operation; that is to say, the automatic door opening and closing mechanism 1 of this application can meet the needs of both manual and fully automatic door opening and closing.

[0041] For example, such as Figure 3 As shown, the spring 13 in the hinge spring system 10 can be, but is not limited to, a tension spring 130. One end of the tension spring 130 is fixedly connected to the housing frame 2, and the other end is fixedly connected to one end of the pull rope 12. Thus, the pull rope 12 applies a tensile torque to the door assembly 3 under the tension of the tension spring 130. When the drive motor 21 operates to drive the drive gear 22 to rotate, the transmission belt 24 rotates around the drive gear 22 and the driven gear 23 under the action of the drive gear 22, causing the fixed member 25 to change position, thereby applying a force that changes the magnitude of the tensile torque to the pull rope 12, disrupting the original torque balance and achieving automatic door opening and closing. It is understood that in other examples of this application, the spring 13 can also be implemented as a compression spring. In this case, the pull rope 12 can apply a tensile torque to the door assembly 3 under the pressure of the compression spring, achieving torque balance. This application will not elaborate further on this aspect.

[0042] Optionally, such as Figure 3 As shown, the transmission belt 24 is implemented as a toothed belt 240 that meshes with the driving gear 22 and the driven gear 23 to prevent the transmission belt 24 from slipping and to ensure that the pulley drive system 20 can accurately and efficiently drive the fixed member 25 to move, which helps to accurately control the automatic opening and closing of the door.

[0043] Optionally, such as Figures 3 to 5As shown, the transmission belt 24 in the pulley drive system 20 is arranged parallel to the tension spring 130, so that the moving direction of the fixed member 25 is consistent with the extension and contraction direction of the tension spring 130. In this way, the fixed member 25 moves along the axial direction of the tension spring 130 under the drive of the transmission belt 24, preventing the tension spring 130 from tilting during extension and contraction, and avoiding interference or friction with other parts.

[0044] According to the above embodiments of this application, as Figures 2 to 5 As shown, the hinge assembly 11 includes a hinge base 111 fixedly connected to the box frame 2, a hinge bracket 112 fixedly connected to the door assembly 3, and a pivot 113 rotatably connecting the hinge bracket 112 to the hinge base 111, so that the door assembly 3 rotates around the pivot 113 to open or close the opening of the box frame 2.

[0045] Optionally, the two ends of the pull cord 12 are respectively limited and connected to the spring 13 and the hinge bracket 112. For example, as Figures 2 to 5 As shown, one end of the pull rope 12 is limited to the free end of the tension spring 130, and the other end of the pull rope 12 is limited to the hinge bracket 112, so as to indirectly connect to the door assembly 3 through the hinge bracket 112, which facilitates the application of a pulling torque to the door assembly 3. It is understood that the limiting connection mentioned in this application may include, but is not limited to, fixed connection, sleeve connection, hook connection and other connection methods, as long as the tension spring 130 can apply a pulling torque to the door assembly 3 through the pull rope 12. This application will not elaborate on this further.

[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. This causes the connection point between the hinge bracket 112 and the pull rope 12 to be misaligned with the axis of the tension spring 130. Consequently, the direction of the tension force exerted by the pull rope 12 on the fixing member 25 differs from the axial direction of the tension spring 130, which can easily damage the pulley drive system 20. To solve this problem, such as... Figure 4 and Figure 5 As 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 tension spring 130 and the hinge bracket 112. The pull rope 12 passes around the roller assembly 14 to change the direction of the pull rope 12, so that the direction of the tension force applied by the pull rope 12 to the fixed member 25 is always consistent with the axial direction of the tension spring 130, thereby preventing the tension spring 130 from tilting.

[0047] Optionally, such as Figure 4 and Figure 5As 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 along the hinge bracket 112. The pull rope 12 extends from the spring 13, passing successively over the adjusting roller 141 and the fixed roller 142, to the hinge bracket 112. In this way, the pull rope 12 first passes over the adjusting roller 141 arranged along the axis adjacent to the tension spring 130 and then connects to the fixing member 25 along the axial direction of the tension spring 130. After passing over the fixed roller 142 arranged along the hinge bracket 112, it can not only ensure that the fixing member 25 is only subjected to the same force as the axial direction of the tension spring 130, preventing the tension spring 130 from tilting, but also increase the tension arm of the pull rope 12, which helps to reduce the elastic force requirement of the tension spring 130.

[0048] It is worth noting that the adjusting roller 141 can be adjusted to move closer to or further away from the tension spring 130 along its axial direction, thereby changing the preload of the tension spring 130 to adapt to changes in the weight of the door assembly 3, thus meeting the suspension requirements for doors of different weights. In other words, for door assemblies 3 of different weights, the automatic door opening and closing mechanism 1 of this application only needs to adjust the preload of the tension spring 130 by adjusting the roller 141 to meet the torque balance requirements for suspension of doors of different weights. Furthermore, after adjusting to accommodate doors of different weights, the automatic door opening and closing mechanism 1 can still achieve automatic opening and closing at all angles via the pulley drive system 20. It is understood that the elasticity of the tension spring 130 will decrease after a period of use. At this time, the automatic door opening and closing mechanism 1 of this application can also adjust the preload of the tension spring 130 by adjusting the roller 141 to still meet the torque balance requirements for suspension of the door.

[0049] Optionally, such as Figures 3 to 5 As shown, the driven gear 23 is arranged coaxially with the fixed roller 142 to ensure that the rope segment on the pull rope 12 located between the fixed roller 142 and the adjusting roller 141 is parallel to the drive belt 24.

[0050] It is worth noting that, such as Figure 4 As shown, when the door assembly 3, which is in the closed position, needs to open, i.e., when entering the initial stage of automatic opening, the door assembly 3's own gravitational torque is relatively small. Therefore, even if the tension torque applied by the hinge spring system 10 to the door assembly 3 drops to zero, the door assembly 3 still struggles to open automatically under its own gravitational torque. To solve this problem, as... Figures 2 to 5As shown, the automatic door opening and closing mechanism 1 of this application may further include a lever assist system 30, which may include a lever 31 for mounting on the housing frame 2, a reset member 32 connected to the lever 31, and a push block 33 protruding from the transmission belt 24; the lever 31 has a fulcrum portion 311 for rotatably connecting to the housing frame 2, a power portion 312 extending from the fulcrum portion 311 toward the push block 33, and a resistance portion 313 extending from the fulcrum portion 311 toward the hinge bracket 112; when the push block 33 is driven by the transmission belt 24 to approach the lever 31 to lift the resistance portion 313, the power portion 312 of the lever 31 moves away from the hinge bracket 112; when the push block 33 is driven by the transmission belt 24 to move away from the lever 31 to disengage from the resistance portion 313, the power portion 312 of the lever 31 moves closer to push the hinge bracket 112 under the reset action of the reset member 32. Thus, when the door assembly 3 in the closed position needs to be opened, the transmission belt 24, driven by the drive motor 21, drives the push block 33 away from the lever 31 to disengage from the resistance part 313. The power part 312 of the lever 31, under the reset action of the reset member 32, approaches to push the hinge bracket 112, thereby applying a pushing torque in the same direction as the gravitational torque to the door assembly 3 to achieve assisted door opening.

[0051] Optionally, such as Figures 3 to 5 As shown, the length of the power arm of the power unit 312 is greater than the length of the resistance arm of the resistance unit 313, forming a force-saving lever. Thus, at the end of the automatic closing process, the push block 33 only needs to apply a small pushing force to the power unit 312 to enable the resistance unit 313 to apply a large lifting force to the hinge bracket 112 to assist in opening the door, without increasing the output power of the drive motor 21. This reduces the requirements on the drive motor 21, facilitating cost reduction and improving feasibility.

[0052] It is worth noting that the reset element 32 mentioned in this application can be implemented as an elastic element such as a spring or rubber band, or as a magnetic element, as long as it can drive the lever 31 to reset and apply a pushing force to the hinge bracket 112. This application will not elaborate further on this. In addition, the reset element 32 of this application can be provided in one or more of the fulcrum portion 311, the power portion 312, and the resistance portion 313, as long as it can achieve the reset effect. This application will not elaborate further on this.

[0053] Optionally, such as Figures 3 to 5As shown, the push block 33 and the fixing member 25 are located at the upper and lower sections of the transmission belt 24, respectively, so that the push block 33 and the fixing member 25 move synchronously in opposite directions under the drive of the transmission belt 24. This ensures that when the fixing member 25 moves closer to the hinge bracket 112 under the drive of the transmission belt 24 to reduce the pulling torque applied to the door assembly 3, the push block 33 moves away from the hinge bracket 112 under the drive of the transmission belt 24 to disengage from the power part 312 of the lever 31. This allows the resistance part 313 of the lever 31 to push the hinge bracket 112 under the reset action of the reset member 32 to assist in opening the door.

[0054] Optionally, such as Figure 3 As shown, the fixing member 25 includes a rope connecting block 251 fixedly connected to the pull rope 12, a belt connecting block 252 fixedly connected to the transmission belt 24, and a limiting protrusion 253 protruding from the belt connecting block 252; the rope connecting block 251 is fixedly connected to the belt connecting block 252; the pulley drive system 20 further includes a micro switch 26 corresponding to the limiting protrusion 253. When the door is closed, the limiting protrusion 253 touches the micro switch 26 under the drive of the transmission belt 24, so that the drive motor 21 stops working; at this time, the push block 33 pushes the power part 312 of the lever 31 under the drive of the transmission belt 24, so that the resistance part 313 of the lever 31 moves away from the hinge bracket 112. It is understood that the micro switch 26 of this application can be communicatively connected to the drive motor 21 to send a stop control signal to the drive motor 21 when it is touched by the limiting protrusion 253, so that the drive motor 21 stops working.

[0055] 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 10 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.

[0056] It is worth noting that in the pulley drive system 20 of this application, the drive motor 21 can be controlled by a control board (not shown in the figure) to rotate forward and backward to drive the transmission belt 24 to rotate around the driving gear 22 and the driven gear 23 in either the forward or reverse direction, causing the fixed member 25 fixed to the transmission belt 24 to perform linear reciprocating motion. Furthermore, the drive motor 21 can have a built-in Hall sensor (not shown in the figure) to detect the rotational speed of the driving gear 22, thereby sensing the magnitude of the motor load and implementing safety precautions. It is understood that this application defines the forward rotation of the drive motor 21 as the direction of rotation that stretches the tension spring 130, and the reverse rotation of the drive motor 21 as the direction of rotation that shortens the tension spring 130.

[0057] For example, to prevent safety issues such as increased load caused by pinching a hand when closing the door, the Hall sensor of this application can first control the drive motor 21 to stop for a first predetermined time n1 when it senses that the motor load has increased and the speed has slowed down when the door is about to be closed, so as to give the user time to release the handle. Then, it can control the drive motor 21 to increase the output power for a second predetermined time n2 to overcome the resistance torque until the door lock signal is triggered to complete the closing, thereby safely realizing automatic closing at all angles.

[0058] Furthermore, for safety and operational considerations during the automatic door opening and closing process, the automatic door opening and closing mechanism 1 of this application can be set with one or more hovering positions, and the position sensor 40 can sense the hovering position of the hinge bracket 112, thereby controlling the drive motor 21 to stop rotating so that the hinge bracket 112 is hovered at the preset hovering position, thereby realizing the hovering of the door assembly 3.

[0059] Optionally, such as Figures 2 to 5 As shown, the position sensor 40 of this application is mounted on the hinge bracket 112.

[0060] Similarly, during the automatic opening and closing process, for safety and operational considerations, such as... Figure 5 As shown, the automatic door opening and closing mechanism 1 of this application can be set to an open position, and the position sensor 40 senses the open position of the hinge bracket 112, thereby controlling the drive motor 21 to stop rotating so that the hinge bracket 112 stays in the open position, thus keeping the door assembly 3 open. It is understood that the position sensor 40 mentioned in this application detects the open position of the door assembly 3 by detecting the movement position of the hinge bracket 112, and generates a door opening signal when the door assembly 3 is in the open position; this will not be elaborated further in this application.

[0061] It is worth noting that since the drive motor 21 has a built-in Hall sensor, during the automatic door opening and closing process, if the user intervenes manually, such as by pushing or pulling the door assembly 3, the load force on the transmission belt 24 via the pull rope 12 changes. At this time, the Hall sensor will detect the change in motor speed and thus determine the user's intention to intervene: when the direction of the user's intervention is consistent with the direction of the transmission belt's movement to open and close the door, i.e., positive intervention, it is equivalent to reducing the load force on the transmission belt 24, which can control the speed of the drive motor 21 to increase, thereby speeding up the opening and closing of the door; when the direction of the user's intervention is inconsistent with the direction of the transmission belt's movement to open and close the door, i.e., reverse intervention, it is equivalent to increasing the load force on the transmission belt 24, which can control the speed of the drive motor 21 to decrease, thereby slowing down the opening and closing of the door.

[0062] 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.

[0063] 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.

[0064] 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 pull cord for connecting to the door assembly, and a spring for connecting to the housing frame, the spring being connected to the pull cord for applying a pulling torque to the door assembly through the pull cord that balances the gravitational torque of the door assembly. The pulley drive system includes a drive motor, a drive gear driven by the drive motor, a driven gear rotatably mounted on the housing frame, a transmission belt fitted onto the drive gear and the driven gear, and a fastener connecting the transmission belt and the pull rope, for increasing or decreasing the tension torque exerted by the pull rope on 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 transmission belt is a toothed belt that meshes with the driving gear and the driven gear.

3. The automatic door opening and closing mechanism according to claim 1, 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 pull rope are respectively limited and connected to the hinge bracket and the spring.

4. The automatic door opening and closing mechanism according to claim 3, characterized in that, The hinge spring system further includes a roller assembly for mounting on the housing frame, the roller assembly including an adjusting roller arranged adjacent to the axis of the spring and a fixed roller arranged adjacent to the hinge bracket, the pull cord extending from the spring, passing successively over the adjusting roller and the fixed roller, to the hinge bracket.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that, The driven gear is arranged coaxially with the fixed roller.

6. The automatic door opening and closing mechanism according to any one of claims 3 to 5, characterized in that, It also includes a lever-assisted system, comprising a lever for mounting to the housing frame, a reset member connected to the lever, and a push block protruding from the drive belt; the lever has a fulcrum portion for rotatably connecting to the housing frame, a power portion extending from the fulcrum portion toward the push block, and a resistance portion extending from the fulcrum portion toward the hinge bracket; when the push block approaches the lever under the drive of the drive belt to lift the resistance portion, the power portion of the lever moves away from the hinge bracket; When the push block moves away from the lever under the drive of the transmission belt to disengage from the resistance part, the power part of the lever moves closer to the hinge bracket under the reset action of the reset member.

7. The automatic door opening and closing mechanism according to claim 6, characterized in that, The length of the power arm of the power unit is greater than the length of the resistance arm of the resistance unit.

8. The automatic door opening and closing mechanism according to claim 6, characterized in that, The push block and the fixing member are located at the upper and lower sections of the transmission belt, respectively.

9. The automatic door opening and closing mechanism according to claim 8, characterized in that, The fixing component includes a rope connecting block fixedly connected to the pull rope, a belt connecting block fixedly connected to the transmission belt, and a limiting protrusion protruding from the belt connecting block; the rope connecting block is fixedly connected to the belt connecting block; the pulley drive system further includes a micro switch corresponding to the limiting protrusion; when the door is closed, the limiting protrusion, driven by the transmission belt, touches the micro switch to stop the drive motor from working.

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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