Automatic door opening mechanism and door box apparatus

Abstract

The utility model relates to an automatic door opening and closing mechanism and door box equipment, which can realize automatic door opening and closing of full angle and improve user experience. The automatic door opening and closing mechanism comprises: a hinge assembly, including a hinge base, a hinge support and a rotating shaft rotatably connecting the hinge support to the hinge base; a driving assembly, including a spring, a linkage connected to the end of the spring and a driving mechanism drivingly connected to the linkage; and a linkage assembly having a first or second flexible section simultaneously limitingly connected to the hinge support and the linkage; the first flexible section extends from the linkage to the hinge support in a forward direction to exert a first pulling torque on the hinge support opposite to the direction of the gravitational torque of the door body assembly; the second flexible section extends from the linkage to the hinge support in a reverse direction to exert a second pulling torque on the hinge support in the same direction as the gravitational torque; the linkage pulls the first or second flexible section when moving to automatically close or open the door.

Description

[0001] This application claims priority to Chinese Patent Application No. 202410170632.6, filed on February 6, 2024, entitled "A Household Appliance", the entire contents of which are incorporated herein by reference. Technical Field

[0002] 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

[0003] Door-mounted appliances such as built-in dishwashers are common household appliances. Typically, these appliances open and close automatically via a push-rod mechanism on top of the appliance. However, existing push-rod mechanisms have two main drawbacks. First, the push-rod extends too far after pushing the door open, affecting aesthetics. Second, the existing mechanism is limited by the push-rod design, allowing only a small range of automatic opening and closing angles. The remaining angles still require manual operation, which often involves overcoming significant locking force, resulting in a poor user experience.

[0004] To improve the user's door opening and closing experience, some door enclosure devices use a hinge spring system to balance or differentiate the torque generated by the hinge spring with the door's weight torque, enabling the door assembly to hover or remain stationary at certain angles. This hinge spring system mainly consists of a spring, a cord, and a hinge. The hinge is positioned between the enclosure frame and the door assembly, allowing the door assembly to pivot relative to the enclosure 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 via the cord and the lever arm Lf of the cord to both change, meaning the tension torque M2 = F * Lf also changes with the door angle.

[0005] 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.

[0006] However, although this hinge spring system can make the door stop at all angles, it is difficult to make the door open and close automatically at all angles, and manual opening and closing is still required. Especially in the initial stage of automatic opening, the gravitational torque of the door assembly is small. At this time, even if the pull rope is completely relaxed so that the tension torque M2 = 0, the door assembly is difficult to open automatically under its own gravitational torque. Utility Model Content

[0007] Therefore, it is necessary to address the problem that existing hinge spring systems can only achieve full-angle hovering and cannot achieve full-angle automatic door opening and closing. This utility model provides an automatic door opening and closing mechanism and door box device that can achieve full-angle automatic door opening and closing, thus improving the user experience.

[0008] In one embodiment of this application, the present invention provides an automatic door opening and closing mechanism, comprising:

[0009] Hinges are used to connect the door assembly and the housing frame.

[0010] A linkage assembly, at least a portion of which is a flexible transmission element, and the linkage assembly is connected to or used for connection to the hinge assembly to form a reciprocating traction loop; and

[0011] The driving component includes a driving mechanism and a linkage component connected to the linkage component. The driving mechanism drives the linkage component to move, thereby causing the flexible transmission component to rotate clockwise or counterclockwise around the traction loop.

[0012] In some embodiments of this application, the drive assembly further includes an elastic element, one end of which is connected to the linkage element, and the other end of which is used to connect to the housing frame to apply an elastic force to the linkage element in a direction that causes the door assembly to close.

[0013] In some embodiments of this application, the linkage component includes a tensioning mechanism having a fixed end for fixing to the housing frame and a movable end connected to the flexible transmission member. The movable end extends, retracts, or rotates relative to the fixed end to tension the flexible transmission member.

[0014] In some embodiments of this application, the hinge assembly includes a hinge base for connection to the housing frame, a hinge bracket for connection to the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the flexible transmission member has a first flexible segment and a second flexible segment that are simultaneously limitedly connected to the hinge bracket and the linkage member; the first flexible segment extends from the linkage member in the forward direction to the hinge bracket to apply a first tensile torque to the hinge bracket opposite to the direction of the gravitational torque of the door assembly; the second flexible segment extends from the linkage member in the reverse direction to the hinge bracket to apply a second tensile torque to the hinge bracket in the same direction as the gravitational torque of the door assembly.

[0015] In some embodiments of this application, the tensioning mechanism is a wheel assembly arranged along the traction loop between the linkage and the hinge bracket; the flexible transmission member is a pull rope that passes around the wheel assembly; both ends of the pull rope are simultaneously limited and connected to the hinge bracket, and the middle part of the pull rope is limited and connected to the linkage.

[0016] In some embodiments of this application, the wheel assembly includes one or more guide wheels and a tensioning wheel around which the pull rope passes, and the second flexible segment passes around the tensioning wheel to be tensioned.

[0017] In some embodiments of this application, the tensioning wheel includes a mounting plate, a rocker arm rotatably connected to the mounting plate, a roller disposed on the rocker arm and passed around by the second flexible segment, and an elastic member disposed between the mounting plate and the rocker arm. The rocker arm swings under the action of the elastic member to drive the roller to tension the second flexible segment.

[0018] In some embodiments of this application, the wheel assembly includes a third pulley arranged adjacent to the elastic element, a fourth pulley arranged adjacent to the hinge bracket, and a fifth pulley located above the hinge bracket; the roller of the tensioning wheel is located between the third pulley and the fourth pulley, and the second flexible segment extends from the linkage element, sequentially passing around the third pulley, the roller, the fourth pulley, and the fifth pulley to connect to the hinge bracket.

[0019] In some embodiments of this application, the wheel assembly includes a first pulley arranged adjacent to the drive mechanism and a second pulley arranged adjacent to the hinge bracket, wherein the first flexible segment passes around the first pulley and the second pulley sequentially from the linkage member to connect to the hinge bracket.

[0020] In some embodiments of this application, the driving mechanism includes a drive motor and a lead screw driven by the drive motor; the linkage includes a nut seat fitted on the lead screw, a threaded connector extending protruding from the nut seat toward the elastic member, and a limiting part that engages with the nut seat and is fixedly connected to the flexible transmission member; the threaded connector is screwed into one end of the elastic member, and the middle part of the flexible transmission member is fixedly connected to the limiting part.

[0021] In some embodiments of this application, the linkage further includes a roller that is rotatably protruding from the nut seat; the nut seat has a threaded hole that matches the lead screw, a mounting groove that partially accommodates the roller, and a locking groove that engages with the limiting portion.

[0022] According to another aspect of this application, one embodiment of this application further provides a door box device, including:

[0023] Box frame;

[0024] Door components; and

[0025] The automatic door opening and closing mechanism described above is disposed between the housing frame and the door assembly.

[0026] In summary, the automatic door opening and closing mechanism of this application, by additionally setting a second flexible segment extending in the reverse direction from the linkage to the hinge bracket, allows the linkage moving forward during the door opening process to pull on the second flexible segment, thereby applying a second tensile torque to the hinge bracket in the same direction as the gravitational torque. In this way, even if the gravitational torque of the door assembly itself is extremely small in the initial stage of opening, the door assembly can still overcome the door lock resistance or friction to open quickly under the action of the second tensile torque, preventing the first flexible segment from becoming loose and avoiding problems such as jamming or shaking of the door assembly during opening, thus ensuring that the door box device has good smoothness during the door opening process.

[0027] Furthermore, since the drive mechanism of this application only needs to apply a small force to the linkage to make the linkage move, it can change the magnitude of the pulling torque to disrupt the torque balance and realize the automatic opening and closing of the door box device; therefore, the drive mechanism of this application does not require a large power, and only needs to provide a small driving force to disrupt the torque balance. The requirements for the drive mechanism are low, which helps to reduce costs and facilitates implementation. Attached Figure Description

[0028] 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;

[0029] Figure 1BA 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;

[0030] Figure 2 This is a perspective view of a door box device according to an embodiment of this application;

[0031] 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;

[0032] Figure 4 A schematic diagram of the automatic door opening and closing mechanism according to the above embodiments of this application is shown from another perspective;

[0033] Figure 5 A schematic diagram of the linkage component in the automatic door opening and closing mechanism according to the above embodiments of this application is shown;

[0034] Figure 6 An example of a pull cord in an automatic door opening and closing mechanism according to the above embodiments of this application is shown;

[0035] Figure 7 A schematic diagram showing the state of the door box device according to the above embodiments of this application when the door is closed is shown;

[0036] Figure 8 A schematic diagram showing the state of the door box device according to the above embodiment of this application when the door is opened is shown.

[0037] Key component symbols: 1. Automatic door opening / closing mechanism; 10. Hinge assembly; 11. Hinge base; 12. Hinge bracket; 13. Rotating shaft; 20. Drive assembly; 21. Spring; 22. Linkage component; 221. Nut seat; 2211. Threaded hole; 2212. Mounting groove; 2213. Slot; 222. Threaded connector; 223. Limiting part; 224. Roller; 23. Drive mechanism; 231. Drive motor; 232. Lead screw; 24. Limiting rib; 30. Linkage assembly; 3 01. First flexible section; 302. Second flexible section; 31. Wheel set; 311. Guide wheel; 3111. First pulley; 3112. Second pulley; 3113. Third pulley; 3114. Fourth pulley; 3115. Fifth pulley; 312. Tensioning wheel; 3121. Mounting plate; 3122. Swing rod; 3123. Pulley; 3124. Elastic element; 3125. Guide post; 32. Pull rope; 40. Door lock system; 2. Box frame; 3. Door assembly; 4. Guide groove.

[0038] 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

[0039] To make the above-mentioned objectives, 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 thorough understanding.

[0040] This invention is explained below. However, this invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this invention. Therefore, this invention is not limited to the specific embodiments disclosed below.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Considering that existing hinge spring systems can only achieve full-angle hovering and cannot achieve full-angle automatic door opening and closing; the applicant has designed an automatic door opening and closing mechanism and door box device, which can achieve full-angle automatic door opening and closing, thus improving the user experience.

[0046] 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.

[0047] More specifically, such as Figures 3 to 6 As shown, the automatic door opening and closing mechanism 1 may include a hinge assembly 10, a drive assembly 20, and a linkage assembly 30. The hinge assembly 10 includes a hinge base 11 for fixed connection with the housing frame 2, a hinge bracket 12 for fixed connection with the door assembly 3, and a pivot 13 rotatably connecting the hinge bracket 12 to the hinge base 11. The drive assembly 20 includes a spring 21 for mounting on the housing frame 2, a linkage member 22 connected to the end of the spring 21, and a drive mechanism 23 drivably connected to the linkage member 22. The linkage component 30 has a first flexible segment 301 and a second flexible segment 302 that are simultaneously limited and connected to the hinge bracket 12 and the linkage member 22. The first flexible segment 301 extends from the linkage member 22 to the hinge bracket 12 to apply a first tensile torque to the hinge bracket 12 opposite to the direction of the gravitational torque of the door assembly 3. The second flexible segment 302 extends from the linkage member 22 to the hinge bracket 12 in the opposite direction to apply a second tensile torque to the hinge bracket 12 in the same direction as the gravitational torque of the door assembly 3. In this way, the linkage member 22 can move relative to the housing frame 2 under the drive of the drive mechanism 23 to pull the first flexible segment 301 or the second flexible segment 302 to automatically close or open the door.

[0048] In other words, when the drive mechanism 23 does not drive the linkage 22, the first tension torque m1 applied by the first flexible segment 301 to the hinge bracket 12 under the action of the spring 21 forms a torque balance with the gravitational torque M1 of the door assembly 3 and the second tension torque m2 applied through the second flexible segment 302, that is, m1≈M1+m2, so that the door assembly 3 can be in a suspended state relative to the box frame 2, realizing the door suspension.

[0049] from Figures 7 to 8 As shown, when the drive mechanism 23 drives the linkage 22 to move forward, the second flexible segment 302 is pulled to apply a second tensile torque m2 to the hinge bracket 12 in the same direction as the gravitational torque; at the same time, the first flexible segment 301 is relaxed to reduce the first tensile torque m1 applied to the hinge bracket 12 via the first flexible segment 301, resulting in the torque balance being broken, i.e., m1 < M1 + m2, so that the door assembly 3 can be in the open state relative to the box frame 2, realizing automatic opening at all angles.

[0050] from Figures 8 to 7 As shown, when the drive mechanism 23 drives the linkage 22 to move in the opposite direction, the first flexible segment 301 is pulled to increase the first tensile torque m1 applied to the hinge bracket 12 via the first flexible segment 301; at the same time, the second flexible segment 302 is relaxed to reduce the second tensile torque m2 applied to the hinge bracket 12 via the second flexible segment 302, resulting in the torque balance being broken, i.e., m1 > M1 + m2, so that the door assembly 3 can be in the closed state relative to the box frame 2, realizing automatic closing at all angles.

[0051] It is worth noting that, in the initial stage of opening (i.e., when the opening angle is small), the gravitational torque of the door assembly 3 is extremely small; and as the opening angle increases, the gravitational torque M1 increases rapidly. Therefore, if the second flexible segment 302 is not provided, in the initial stage of opening, even if the door assembly 3 can slowly open under the action of its own gravitational torque, the first flexible segment 301 is also very prone to slack; thereafter, as the opening angle increases, the opening speed of the door assembly 3 will accelerate; this causes the first flexible segment 301 to tighten after a period of slack, which will cause problems such as jamming and shaking of the door assembly 3 during the opening process.

[0052] However, the automatic door opening and closing mechanism 1 of this application additionally sets a second flexible segment 302 extending in the opposite direction from the linkage 22 to the hinge bracket 12. By pulling the second flexible segment 302 during the door opening process, the second flexible segment 302 applies a second tensile torque m2 to the hinge bracket 12 in the same direction as the gravitational torque. In this way, in the initial stage of opening, even if the gravitational torque M1 of the door assembly 3 itself is extremely small, the door assembly 3 can still overcome the door lock resistance or friction and open the door quickly under the action of the second tensile torque m2, preventing the first flexible segment 301 from becoming loose and avoiding problems such as jamming and shaking of the door assembly 3 during the opening process, thus ensuring that the door box device has good smoothness during the opening process.

[0053] Furthermore, since the drive mechanism 23 of this application only needs to apply a small force to the linkage 22 to move it, it can change the magnitude of the tension torques m1 and m2, thereby disrupting the torque balance and realizing the automatic opening and closing of the door box device. Therefore, the drive mechanism 23 of this application does not require large power; it only needs to provide a small driving force to disrupt the torque balance. This reduces the requirements on the drive mechanism, helps to reduce costs, and is easy to implement. At the same time, the door box device of this application retains the hinge spring system, so that manual opening and closing with a hovering function can still be completed when the drive mechanism 23 is not in motion. In other words, the automatic opening and closing mechanism 1 of this application can meet both the needs of manual and fully automatic opening and closing.

[0054] For example, such as Figures 2 to 4 As shown, the linkage assembly 30 may include a wheel set 31 arranged along the traction path between the linkage member 22 and the hinge bracket 12, and a pull rope 32 passing around the wheel set 31, so as to provide the first flexible segment 301 and the second flexible segment 302 through the pull rope 32. It is understood that although the first flexible segment 301 and the second flexible segment 302 are provided simultaneously by a single pull rope in the above example, in other examples of this application, the first flexible segment 301 and the second flexible segment 302 may also be provided by two pull ropes, that is, the ends of the two pull ropes are respectively limited to the hinge bracket 12 and the linkage member 22, and the required pull rope linkage effect can still be achieved. This application will not elaborate further on this.

[0055] Optionally, both ends of the pull cord 32 are simultaneously limited and connected to the hinge bracket 12, and the middle portion of the pull cord 32 is limited and connected to the linkage member 22. It is understood that in other examples of this application, both ends of the pull cord 32 may also be simultaneously limited and connected to the linkage member 22, and the middle portion of the pull cord 32 may be correspondingly limited and connected to the hinge bracket 12; or the pull cord 32 may also be limited and connected to the hinge bracket 12 and the linkage member 22 through other parts respectively, as long as the required first flexible section 301 and second flexible section 302 can be provided, which will not be elaborated further in this application.

[0056] Optionally, such as Figure 3 and Figure 4 As shown, the wheel assembly 31 includes one or more guide wheels 311 around which the pull rope 32 passes, for guiding the direction of the pull rope 32, such that the first flexible segment 301 is pulled from below the hinge bracket 12, ensuring that the first flexible segment 301 applies a first pulling torque to the hinge bracket 12 opposite to the direction of the gravitational torque of the door assembly 3, while the second flexible segment 302 is pulled from above the hinge bracket 12, ensuring that the second flexible segment 302 applies a second pulling torque to the hinge bracket 12 in the same direction as the gravitational torque of the door assembly 3.

[0057] Optionally, such as Figure 3 and Figure 4 As shown, the wheel assembly 31 further includes a tensioning wheel 312 around which the pull rope 32 passes, and the second flexible segment 302 passes around the tensioning wheel 312 to be tensioned; in other words, the second flexible segment 302 passes around the tensioning wheel 312 so that it is always in a tensioned state under the action of the tensioning wheel 312, preventing excessive slack and facilitating reset during the closing process.

[0058] Optionally, such as Figure 3 and Figure 4 As shown, the tensioning wheel 312 includes a mounting plate 3121 for fixedly connecting the housing frame 2, a rocker arm 3122 rotatably connected to the mounting plate 3121, a pulley 3123 disposed on the rocker arm 3122 and passed over by the second flexible segment 302, and an elastic element 3124 disposed between the mounting plate 3121 and the rocker arm 3122; the rocker arm 3122 swings under the action of the elastic element 3124 to drive the pulley 3123 to tension the second flexible segment 302. It is understood that the elastic element 3124 mentioned in this application may be, but is not limited to, a torsion spring, a tension spring, or a compression spring, as long as it can provide tension to the second flexible segment 302, which will not be elaborated further in this application.

[0059] Optionally, such as Figure 2 and Figure 4As shown, the tensioning wheel 312 further includes a guide post 3125 protruding from the rocker arm 3122; the housing frame 2 has a guide groove 4 that matches the guide post 3125, and the guide post 3125 is slidably inserted into the guide groove 4, so that the pulley 3123 of the tensioning wheel 312 can move along the guide groove 4 under the action of the elastic member 3124 and the second flexible segment 302, thereby improving the tensioning stability of the tensioning wheel 312. Preferably, the guide post 3125 and the pulley 3123 are arranged coaxially to further improve the stability of the overall structure.

[0060] According to the above embodiments of this application, as Figures 2 to 4 As shown, the drive mechanism 23 may include a drive motor 231 and a lead screw 232 driven by the drive motor 231. The lead screw 232 is threaded to the linkage 22 and is used to move the linkage 22 linearly under the drive of the drive motor 231 to pull the first flexible segment 301 or the second flexible segment 302 and to shorten or lengthen the spring 21 to break the torque balance and realize automatic door opening and closing.

[0061] Optionally, such as Figure 3 and Figure 4 As shown, the lead screw 232 and the spring 21 are arranged coaxially, so that the force exerted by the lead screw 232 on the spring 21 through the linkage 22 is collinear with the axis of the spring 21. This prevents the spring 21 from deflecting during extension and retraction, thus avoiding friction or interference with other parts. This makes the extension and retraction of the spring 21 smoother and more feasible. It is understood that compared to a parallel arrangement of the lead screw 232 and the spring 21, the automatic door opening and closing mechanism 1 of this application also saves space in the height direction of the base frame 2, resulting in better adaptability.

[0062] For example, such as Figure 5 and Figure 6 As shown, the linkage 22 may include a nut seat 221 fitted onto the lead screw 232, a threaded connector 222 extending protruding from the nut seat 221 toward the spring 21, and a limiting part 223 that engages with the nut seat 221 and is fixedly connected to the pull rope 32. The threaded connector 222 is screwed into one end of the spring 21 to securely connect the spring 21 to the linkage 22. The middle part of the pull rope 32 is fixedly connected to the limiting part 223 to limit the connection between the pull rope 32 and the linkage 22. Thus, when the lead screw 232 rotates under the drive of the drive motor 231, the linkage 22 slides along the lead screw 232 to pull the first flexible section 301 or the second flexible section 302 of the pull rope 32, thereby breaking the torque balance and realizing the automatic opening and closing of the door box device.

[0063] It is worth noting that although the spring 21 of this application can limit the rotation of the linkage 22 with the lead screw 232 to a certain extent, so as to convert the rotational motion of the lead screw 232 into the linear motion of the linkage 22, in order to further improve the stability of motion conversion, the housing frame 2 of this application can limit the rotation of the linkage 22 by using a linear groove, so that the linkage 22 can only perform linear sliding motion relative to the housing frame 2. However, the linkage 22 will generate sliding friction when sliding relative to the housing frame 2, which is prone to noise; in order to solve this problem, such as Figure 2 and Figure 5 As shown, the linkage 22 of this application may further include a roller 224, which is rotatably protruding from the nut seat 221 and used to abut against the housing frame 2, so that the friction between the linkage 22 and the housing frame 2 when the linkage 22 slides along the lead screw 232 is rolling friction, which helps to reduce the friction between the linkage 22 and the housing frame 2, reduce sliding noise, and improve the operational stability of the automatic door opening and closing mechanism 1.

[0064] Optionally, such as Figure 5 As shown, the nut seat 221 has a threaded hole 2211 that matches the lead screw 232, a mounting groove 2212 that partially accommodates the roller 224, and a retaining groove 2213 that engages with the limiting part 223. Thus, the lead screw 232 is rotatably inserted into the nut seat 221 to convert the rotational motion of the lead screw 232 into the linear motion of the nut seat 221; the roller 224 extends partially out of the mounting groove 2212, facilitating rolling contact with the housing frame 2, allowing the linkage 22 to roll and rub against the housing frame 2; the limiting part 223 engages with the retaining groove 2213 to securely connect the pull rope 32 to the nut seat 221 along the direction of movement, ensuring that the linkage 22 can pull the first flexible section 301 or the second flexible section 302 of the pull rope 32 when moving along the lead screw 232. It is understandable that the external thread of the screw connector 222 is coaxially arranged with the internal thread of the threaded hole 2211 in order to ensure that the lead screw 232 is coaxially arranged with the spring 21.

[0065] It is worth noting that the spring 21 in the linkage assembly 30 can be, but is not limited to, a tension spring. One end of the tension spring is fixedly connected to the linkage member 22, and the other end is adjustablely connected to the housing frame 2. Thus, the pull rope 32 applies a tensile torque to the door assembly 3 under the tension of the tension spring. When the drive motor 231 operates to drive the lead screw 232 to rotate, the linkage member 22 moves along the lead screw 232 under its action, causing a positional change in one end of the tension spring. This applies a force that alters the magnitude of the tensile torque to the tension spring and the pull rope 32, disrupting the original torque balance and achieving automatic door opening and closing. It is understood that in other examples of this application, the spring 21 can also be implemented as a compression spring. In this case, the pull rope 32 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.

[0066] Specifically, the other end of the tension spring in this application can be fixedly connected to the housing frame 2 via a fixing plate and an adjusting screw. Thus, when the adjusting screw is rotated, the position of the other end of the tension spring will change, moving away from or closer to the linkage 22, thereby altering the preload tension of the tension spring 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 tension of the tension spring via the adjusting screw to meet the torque balance requirements for suspension of doors of different weights. Furthermore, after adjusting to accommodate doors of different weights, the drive assembly 20 can still achieve automatic opening and closing of the door at all angles. It is understood that after a period of use, the elasticity of the tension spring will decrease. At this time, the automatic door opening and closing mechanism 1 of this application can also adjust the preload tension of the tension spring via the adjusting screw to still meet the torque balance requirements for suspension of the door.

[0067] In addition, such as Figure 3 and 4 As shown, both ends of the pull rope 32 are simultaneously limited and connected to the hinge bracket 12, so that the pull rope 32 indirectly acts on the door assembly 3 through the hinge bracket 12, 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, etc., as long as the pull rope 32 can apply a pulling torque to the door assembly 3, which will not be elaborated further in this application.

[0068] Optionally, such as Figure 2 and Figure 3As shown, the first flexible segment 301 and the second flexible segment 302 of the pull cord 32 are respectively hooked to different parts of the hinge bracket 12. Preferably, the connection point between the first flexible segment 301 and the hinge bracket 12 is located between the pivot 13 and the connection point between the second flexible segment 302 and the hinge bracket 12, so as to meet the lever arm requirements for opening and closing the door. It is understood that in other examples of this application, the first flexible segment 301 and the second flexible segment 302 of the pull cord 32 may also be hooked to the same part of the hinge bracket 12, which will not be described in detail here.

[0069] It is worth noting that during the opening and closing of the door, such as Figure 7 and Figure 8 As shown, the hinge bracket 12 rotates around the pivot 13 along with the door assembly 3, causing the force exerted by the pull rope 32 on the linkage 22 to be out of sync with the axis of the spring 21. This results in the direction of the tension force exerted by the pull rope 32 on the linkage 22 being different from the extension direction of the lead screw 232, causing the lead screw 232 to be subjected to a deviated tension, which can easily damage the lead screw 232. To solve this problem, as... Figure 3 , Figure 7 as well as Figure 8 As shown, the multiple guide wheels 311 in the linkage assembly 30 of this application can be implemented as a first pulley 3111 arranged near the drive motor 231 and a second pulley 3112 arranged near the hinge bracket 12. The first flexible segment 301 of the pull rope 32 passes successively around the first pulley 3111 and the second pulley 3112 from the linkage member 22 to connect to the hinge bracket 12. In this way, the first flexible segment 301 of the pull rope 32 can be connected to the linkage member 22 along the extension direction of the lead screw 232 between the linkage member 22 and the first pulley 3111, ensuring that the linkage member 22 is only subjected to the same force as the extension direction of the lead screw 232, preventing the lead screw 232 from being damaged. At the same time, after passing around the second pulley 3112, the first flexible segment 301 of the pull rope 32 can increase the tension arm of the first flexible segment 301, which helps to reduce the elasticity requirement of the spring 21.

[0070] In addition, such as Figure 3 , Figure 7 as well as Figure 8As shown, the plurality of guide wheels 311 in the linkage assembly 30 of this application can be further implemented as a third pulley 3113 arranged near the spring 21, a fourth pulley 3114 arranged near the hinge bracket 12, and a fifth pulley 3115 located above the hinge bracket 12; the pulley 3123 of the tension wheel 312 is located between the third pulley 3113 and the fourth pulley 3114, and the second flexible segment 302 of the pull rope 32 passes sequentially from the linkage 22 around the third pulley 3113, the pulley 3123, the fourth pulley 3114 and the fifth pulley 3115 to connect the hinge bracket 12. In this way, the second flexible section 302 of the pull rope 32 can be connected to the linkage 22 along the extension direction of the spring 21 between the linkage 22 and the third pulley 3113, ensuring that the linkage 22 is only subjected to the same force as the extension direction of the spring 21, preventing the lead screw 232 and the spring 21 from being damaged; at the same time, the second flexible section 302 of the pull rope 32 can be tensioned by the pulley 3123 of the tensioning wheel 312 between the third pulley 3113 and the fourth pulley 3114, so as to pull the hinge bracket 12 upward under the action of the fifth pulley 3115, ensuring that the second flexible section 302 applies a pulling torque to the hinge bracket 12 in the same direction as the gravitational torque of the door assembly 3.

[0071] It is understood that in other examples of this application, only one of the first pulley 3111 and the second pulley 3112 may be retained, or the number of pulleys around which the first flexible segment 301 passes may be further increased; the fourth pulley 3114 may be omitted, and similarly, the number of pulleys around which the second flexible segment 302 passes may be further increased. Furthermore, the tensioning pulley 312 may replace the fifth pulley 3115, which will not be elaborated upon in this application.

[0072] According to the above embodiments of this application, as Figure 2 , Figure 7 as well as Figure 8As shown, the automatic door opening and closing mechanism 1 may further include a door lock system 40 for releasably locking the door assembly 3 to the housing frame 2. The door lock system 40 has a first state and a second state, and the door lock force when the door lock system 40 is in the first state is greater than the door lock force when the door lock system 40 is in the second state. Thus, when it is necessary to open the door, the door lock system 40 will switch from the first state to the second state to reduce the door lock force; at this time, the door lock is unlocked, the lock hook disengages from the door lock, and the signal change during the switching process will trigger the drive motor 231 to rotate forward, so as to drive the linkage 22 to move in the direction of stretching the tension spring, so that the first flexible segment 301 of the pull rope 32 tends to reduce the first tension torque applied to the hinge bracket 12; at the same time, the second flexible segment 302 of the pull rope 32 tends to increase the second tension torque applied to the hinge bracket 12, so as to disrupt the torque balance and realize automatic door opening. It is understood that the automatic door opening and closing mechanism 1 of this application opens not only under the gravity of the door assembly 3, but also actively opens with an additional control torque (i.e., the second tension torque provided by the second flexible segment 302). This prevents the door assembly 3 from failing to open due to the small gravity torque of the door assembly 3 in the initial stage of opening, or from forming an inertial vibration due to the first flexible segment 301 loosening first and then the door assembly 3 opening. This ensures that the door assembly 3 of this application opens smoothly under the action of the active control torque.

[0073] Similarly, when the door needs to be closed, the closing signal triggers the drive motor 231 to rotate in the opposite direction, causing the linkage 22 to move in the direction of shortening the tension spring. This causes the first flexible segment 301 of the pull rope 32 to tend to increase the first tension torque applied to the hinge bracket 12; at the same time, the second flexible segment 302 of the pull rope 32 tends to decrease the second tension torque applied to the hinge bracket 12, thereby disrupting the torque balance and achieving automatic door closing. It can be understood that when the door assembly 3 is about to reach the closed position (e.g., the opening angle is about 0.5°), the lock hook in the door lock system 40 will enter the door lock to trigger the door lock signal. Afterwards, the control board will control the door lock system 40 to switch from the second state to the first state to pull the lock hook into the door lock and complete the locking.

[0074] It is worth noting that, such as Figure 7 As shown, when the door box device completes closing, the door assembly 3 remains fixed relative to the box frame 2, preventing the pull rope 32 from being pulled relative to the door assembly 3 and the box frame 2. This restricts the linkage 22 from continuing to move towards the tension spring, thus limiting the closing limit position of the linkage 22. Conversely, when the door box device completes opening, to limit the opening limit position of the linkage 22 and prevent it from contacting or impacting the drive motor 231, as shown... Figure 8As shown, the drive assembly 20 of this application may further include a limiting rib 24 protruding from the box frame 2. The limiting rib 24 is arranged adjacent to the drive motor 231 and is used to abut against the linkage 22 when the door assembly 3 is opened to the maximum angle, so as to limit the linkage 22 from continuing to move away from the tension spring and prevent the tension spring from being overstretched.

[0075] 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.

[0076] It is worth noting that in the drive assembly 20 of this application, the drive motor 231 can be controlled by a control board (not shown in the figure) to rotate forward and backward to drive the linkage 22 to perform linear reciprocating motion along the lead screw 232. Furthermore, the drive motor 231 can have a built-in Hall sensor (not shown in the figure) to detect the rotational speed of the lead screw 232, thereby sensing the magnitude of the motor load and implementing safety precautions. It is understood that this application can define the forward rotation of the drive motor 231 as the direction of rotation that stretches the tension spring, and the reverse rotation of the drive motor 231 as the direction of rotation that shortens the tension spring.

[0077] For example, to prevent safety issues such as increased screw load caused by pinching a hand when closing the door, the Hall sensor of this application can first control the drive motor 231 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 231 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.

[0078] 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. The drive motor 231 is controlled to move and stop through program timing. When the drive motor 231 stops moving, the extra torque disappears, and the torque balance is restored to achieve hovering.

[0079] Furthermore, since the drive motor 231 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 lead screw 232 by the door assembly 3 via the pull rope 32 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 lead screw's action to open and close the door, that is, when the intervention is positive, it is equivalent to reducing the load force on the lead screw 232, and the speed of the drive motor 231 can be controlled to increase, so as to speed up the opening and closing of the door; when the direction of the user's intervention is inconsistent with the direction of the lead screw's action to open and close the door, that is, when the intervention is negative, it is equivalent to increasing the load force on the lead screw 232, and the speed of the drive motor 231 can be controlled to decrease, so as to slow down the opening and closing of the door.

[0080] 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.

[0081] 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.

[0082] 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, characterized in that, include: Hinges are used to connect the door assembly and the housing frame. A linkage assembly, at least a portion of which is a flexible transmission element, and the linkage assembly is connected to the hinge assembly or is used to connect to the door assembly to form a reciprocating traction loop. as well as The driving component includes a driving mechanism and a linkage component connected to the linkage component. The driving mechanism drives the linkage component to move, thereby causing the flexible transmission component to rotate clockwise or counterclockwise around the traction loop.

2. The automatic door opening and closing mechanism according to claim 1, characterized in that, The drive assembly further includes an elastic element, one end of which is connected to the linkage element, and the other end of which is used to connect to the housing frame to apply an elastic force to the linkage element in a direction that causes the door assembly to close.

3. The automatic door opening and closing mechanism according to claim 2, characterized in that, The linkage component includes a tensioning mechanism, which has a fixed end for fixing to the housing frame and a movable end connected to the flexible transmission member. The movable end extends, retracts, or rotates relative to the fixed end to tension the flexible transmission member.

4. The automatic door opening and closing mechanism according to claim 3, characterized in that, The hinge assembly includes a hinge base for connection to the housing frame, a hinge bracket for connection to the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the flexible transmission member has a first flexible segment and a second flexible segment that are simultaneously limitedly connected to the hinge bracket and the linkage member; the first flexible segment extends from the linkage member in the forward direction to the hinge bracket to apply a first tensile torque to the hinge bracket in the opposite direction to the gravitational torque of the door assembly; The second flexible segment extends in the opposite direction from the linkage to the hinge bracket to apply a second tensile torque to the hinge bracket in the same direction as the gravitational torque of the door assembly.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that, The tensioning mechanism is a wheel assembly arranged along the traction loop between the linkage and the hinge bracket; the flexible transmission component is a pull rope that passes around the wheel assembly; both ends of the pull rope are simultaneously limited and connected to the hinge bracket, and the middle part of the pull rope is limited and connected to the linkage.

6. The automatic door opening and closing mechanism according to claim 5, characterized in that, The wheel assembly includes one or more guide wheels and a tensioning wheel around which the pull rope passes, and the second flexible segment passes around the tensioning wheel to be tensioned.

7. The automatic door opening and closing mechanism according to claim 6, characterized in that, The tensioning wheel includes a mounting plate, a rocker arm rotatably connected to the mounting plate, a roller disposed on the rocker arm and passed around by the second flexible segment, and an elastic element disposed between the mounting plate and the rocker arm. The rocker arm swings under the action of the elastic element to drive the roller to tension the second flexible segment.

8. The automatic door opening and closing mechanism according to claim 7, characterized in that, The wheel assembly includes a third pulley arranged adjacent to the elastic element, a fourth pulley arranged adjacent to the hinge bracket, and a fifth pulley located above the hinge bracket; the roller of the tensioning wheel is located between the third pulley and the fourth pulley, and the second flexible segment extends from the linkage element, sequentially passing around the third pulley, the roller, the fourth pulley, and the fifth pulley to connect to the hinge bracket.

9. The automatic door opening and closing mechanism according to claim 6, characterized in that, The wheel assembly includes a first pulley arranged adjacent to the drive mechanism and a second pulley arranged adjacent to the hinge bracket. The first flexible segment passes around the first pulley and the second pulley from the linkage member to connect to the hinge bracket.

10. The automatic door opening and closing mechanism according to any one of claims 2 to 9, characterized in that, The driving mechanism includes a drive motor and a lead screw connected to the drive motor; the linkage includes a nut seat fitted on the lead screw, a threaded connector extending protruding from the nut seat toward the elastic member, and a limiting part that engages with the nut seat and is fixedly connected to the flexible transmission member; the threaded connector is screwed into one end of the elastic member, and the middle part of the flexible transmission member is fixedly connected to the limiting part.

11. The automatic door opening and closing mechanism according to claim 10, characterized in that, The linkage further includes a roller that is rotatably protruding from the nut seat; the nut seat has a threaded hole that matches the lead screw, a mounting groove that partially accommodates the roller, and a locking groove that engages with the limiting part.

12. Door box 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 11 is disposed between the housing frame and the door assembly.

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