Linkage hinge mechanism, automatic door opening and closing device, and door box apparatus

Abstract

The application relates to a connecting rod hinge mechanism, an automatic door opening and closing device and a door box equipment, which can save space, reduce cost, improve the stability and reliability of connection and transmission and improve user experience. The connecting rod hinge mechanism comprises a hinge fixed plate, a hinge movable plate, a connecting rod assembly, a first connecting rod rotatably connected with the hinge fixed plate and the hinge movable plate at two ends, a second connecting rod arranged at intervals from the first connecting rod and rotatably connected with the hinge fixed plate and the hinge movable plate at two ends, a third connecting rod upwardly extended from the first connecting rod, a fourth connecting rod extended from the first connecting rod to the third connecting rod and a fifth connecting rod rotatably connected with the third connecting rod and / or the fourth connecting rod, and an elastic assembly connected with the fifth connecting rod and used for applying a moment opposite to the gravity moment direction of a door body assembly to the hinge movable plate through the connecting rod assembly.

Description

Technical Field

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

[0002] Door-mounted appliances, such as built-in dishwashers, are commonly used household appliances. Currently, some door-mounted appliances achieve door hovering and a certain angle of non-hovering by balancing or differentiating the torque generated by a hinge spring system with the gravitational torque of the door. This hinge spring system mainly consists of a spring, a cord, and a hinge. The hinge is positioned between the door and the cabinet assembly, allowing the door assembly to rotate relative to the cabinet assembly to change its angle. The spring, connected to the hinge via the cord, applies a tensile torque to the hinge to overcome the gravitational torque of the door assembly, achieving a balanced hovering effect.

[0003] However, existing hinge spring systems require the use of flexible pull cords for connection. This not only requires additional rollers to change the direction of the pull cord, which takes up a lot of space and is costly, but also results in poor stability of the pull cord. During the opening and closing of the door, the pull cord is prone to abnormal loosening or breakage, causing the door's hovering function to fail. Summary of the Invention

[0004] Therefore, it is necessary to address the problems of existing hinge spring systems, which not only occupy a large space and have high costs, but also are prone to abnormal loosening or breakage of the pull rope during the opening and closing process, causing the door to malfunction. This application provides a linkage hinge mechanism, an automatic door opening and closing device, and a door box device, which can improve the stability and reliability of connection and transmission, and improve the user experience while saving space and reducing costs.

[0005] According to one aspect of this application, one embodiment of this application provides a linkage mechanism, including:

[0006] Hinge fixing plate, used to fix it to the housing assembly;

[0007] Hinge plate, used to fix to the door assembly;

[0008] A linkage assembly includes a first link rotatably connected at both ends to the hinge fixed plate and the hinge movable plate, a second link spaced apart from the first link and rotatably connected at both ends to the hinge fixed plate and the hinge movable plate, a third link extending upward from the first link, a fourth link extending from the first link to the third link, and a fifth link rotatably connected to the third link and / or the fourth link; and

[0009] An elastic component, connected to the fifth link, is used to apply a torque to the hinge plate through the link assembly that is opposite to the gravitational torque of the door assembly.

[0010] In one embodiment of this application, the first link, the third link, and the fourth link are rotatably connected end to end to form a triangular structure.

[0011] In one embodiment of this application, the third link, the fourth link, and the fifth link are coaxially pivotally connected.

[0012] In one embodiment of this application, the second link is located above the first link; wherein the front end of the first link is coaxially pivotally connected to the hinge movable plate and the fourth link, and the rear end of the first link is coaxially pivotally connected to the hinge fixed plate and the third link, and the third link is rotatably connected to the fourth link.

[0013] In one embodiment of this application, the elastic component includes a slider rotatably connected to the fifth link and slidably disposed on the housing assembly, and an elastic element for mounting on the housing assembly. The elastic element is connected to the slider and is used to accumulate or release elastic potential energy when the fifth link drives the slider to slide relative to the housing assembly.

[0014] In one embodiment of this application, the elastic component further includes a guide extending forward and backward, and the sliding member is movably connected to the guide for sliding forward and backward relative to the housing assembly under the guidance of the guide; the elastic member is a tension spring whose rear end is fixedly connected to the sliding member.

[0015] According to another aspect of this application, one embodiment of this application further provides an automatic door opening and closing device, comprising:

[0016] Any of the above-described linkage mechanisms; and

[0017] A drive mechanism drives an elastic component connected to the linkage mechanism to adjust the magnitude and direction of the torque applied by the linkage component to the hinge plate.

[0018] In one embodiment of this application, the guide of the elastic component is a lead screw threadedly connected to the slider of the elastic component; the driving mechanism is a drive motor drivenly connected to the lead screw.

[0019] In one embodiment of this application, the drive motor has a built-in Hall sensor.

[0020] According to another aspect of this application, one embodiment of this application further provides a door box device, including:

[0021] Enclosure assembly;

[0022] Door components; and

[0023] The linkage hinge mechanism described above, wherein the linkage hinge mechanism is disposed between the housing assembly and the door assembly.

[0024] In summary, because the linkage hinge mechanism of this application rigidly connects the elastic component to the hinge movable plate through the fifth link, the fourth link, the third link, and the first link, instead of connecting the hinge movable plate and the elastic component through a flexible pull rope, the linkage hinge mechanism of this application not only eliminates the need for additional guide wheels and tension wheels to guide and tension the pull rope, reducing the installation space requirements on the housing assembly, thus saving space and reducing costs, but also avoids the problem of elastic force not being able to act on the hinge bracket due to the pull rope becoming loose or broken during the opening and closing process, improving the stability and reliability of the connection and transmission, and contributing to a better user experience.

[0025] Specifically, since the third and fourth links both extend upward from the first link and intersect to form a triangular space above the first link, the third and fourth links are relatively fixed to the first link to rotate with the opening and closing of the door. Therefore, the lever arm of the fifth link, which is rotatably connected to the third and / or fourth links, acting on the door assembly is increased. This helps to reduce the force required by the elastic component to ensure the door is suspended. Especially in the final stage of closing, the elastic component only needs to provide a small force to apply a large closing torque to the door assembly to overcome the door lock resistance and / or door seal resistance, ensuring that the door box device has a better closing sealing effect. Attached Figure Description

[0026] Figure 1 This is a perspective view of a door box device according to an embodiment of this application;

[0027] Figure 2 A schematic diagram of the linkage hinge mechanism in the door box device according to the above embodiments of this application is shown;

[0028] Figure 3 An exploded view of the linkage mechanism according to the above embodiments of this application is shown;

[0029] Figure 4 A modified example of a link assembly in a link hinge mechanism according to the above embodiments of this application is shown;

[0030] Figure 5 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;

[0031] Figure 6 A schematic diagram showing the state of the door box device according to the above embodiments of this application when the door is opened;

[0032] Figure 7 This is a schematic diagram of an automatic door opening and closing device according to an embodiment of this application;

[0033] Figure 8 A schematic diagram of the force analysis of the fifth link in the automatic door opening and closing device according to the above embodiment of this application is shown.

[0034] Explanation of key component symbols:

[0035] 1. Linkage hinge mechanism; 10. Hinge fixing plate; 20. Hinge movable plate; 21. Movable plate body; 22. Limiting part; 30. Linkage assembly; 31. First link; 32. Second link; 33. Third link; 34. Fourth link; 35. Fifth link; 40. Elastic component; 41. Sliding component; 411. Nut seat; 412. Threaded joint; 413. Pivot; 414. Roller; 42. Elastic component; 420. Tension spring; 43. Guide component; 430. Lead screw; 44. Snap-fit ​​plate; 45. Adjusting screw; 50. Drive mechanism; 51. Drive motor; 2. Box assembly; 3. Door assembly.

[0036] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this application. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Considering that existing hinge spring systems require a flexible pull cord for connection, this not only necessitates additional rollers to change the direction of the cord, occupying significant space and increasing cost, but also suffers from poor cord stability, making it prone to abnormal loosening or breakage during door opening and closing, thus causing the door's hovering function to fail. Therefore, the applicant has designed a linkage hinge mechanism, an automatic door opening and closing device, and a door housing device that can save space, reduce costs, improve the stability and reliability of connection and transmission, and enhance the user experience.

[0042] Specifically, see the attached document. Figures 1 to 6 As shown, one embodiment of this application provides a door enclosure device, which may include a enclosure assembly 2, a door assembly 3, and a linkage hinge mechanism 1. The linkage hinge mechanism 1 is disposed between the enclosure assembly 2 and the door assembly 3 to realize the function of door suspension. It is understood that the door enclosure device of this application may be implemented as, but is not limited to, other embedded devices such as embedded dishwashers or embedded refrigerators; in addition, the door enclosure device of this application may also include, but is not limited to, functional subjects capable of realizing functions such as washing dishes or refrigeration, which will not be elaborated here.

[0043] More specifically, such as Figures 2 to 6As shown, the linkage hinge mechanism 1 may include a hinge fixing plate 10 for fixing to the housing assembly 2, a hinge movable plate 20 for fixing to the door assembly 3, a linkage assembly 30, and an elastic component 40. The linkage assembly 30 includes a first link 31 rotatably connected at both ends to the hinge fixing plate 10 and the hinge movable plate 20, a second link 32 spaced apart from the first link 31 and rotatably connected at both ends to the hinge fixing plate 10 and the hinge movable plate 20, a third link 33 extending upward from the first link 31, a fourth link 34 extending from the first link 31 to the third link 33, and a fifth link 35 rotatably connected to the third link 33 and / or the fourth link 34. The elastic component 40 is connected to the fifth link 35 and applies a torque to the hinge movable plate 20 through the linkage assembly 30 in a direction opposite to the gravitational torque of the door assembly 3.

[0044] Thus, as Figure 5 and Figure 6 As shown, during the opening and closing of the door, the first link 31, the third link 33, and the fourth link 34 rotate with the door assembly 3 under the drive of the hinge movable plate 20, and push or pull the elastic component 40 through the fifth link 35 to accumulate or release elastic potential energy, so that the torque applied by the link assembly 30 to the hinge movable plate 20 under the action of the elastic component 40 changes; then, when the torque applied by the link assembly 30 to the hinge movable plate 20 under the action of the elastic component 40 is basically equal to the gravitational torque of the door assembly 3, the gravitational torque of the door assembly 3 itself will achieve torque balance with the torque applied by the elastic component 40, so that the door assembly 3 can be in a suspended state relative to the box assembly 2.

[0045] It is worth noting that, since the linkage hinge mechanism 1 of this application rigidly connects the elastic component 40 to the hinge movable plate 20 through the fifth link 35, the fourth link 34, the third link 33 and the first link 31, instead of connecting the hinge movable plate 20 and the elastic component 40 through a flexible pull rope, the linkage hinge mechanism 1 of this application not only does not require additional guide wheels and tension wheels to guide and tension the pull rope, reducing the installation space requirements on the housing component 2, which helps to save space and reduce costs, but also avoids the problem of elastic force not being able to act on the hinge bracket due to the pull rope loosening or breaking during the opening and closing process, thus improving the stability and reliability of the connection and transmission and improving the user experience.

[0046] Specifically, since the third link 33 and the fourth link 34 both extend upward from the first link 31 and intersect to form a triangular space above the first link 31, the third link 33 and the fourth link 34 are relatively fixed to the first link 31 to rotate with the opening and closing of the door. Therefore, the lever arm of the fifth link 35, which is rotatably connected to the third link 33 and / or the fourth link 34, acting on the door assembly 3 is increased. This helps to reduce the force required by the elastic component 40 to ensure that the door is suspended. Especially in the final stage of closing, the elastic component 40 only needs to provide a small force to apply a large closing torque to the door assembly 3 to overcome the door lock resistance and / or door seal resistance, ensuring that the door box device has a better closing sealing effect.

[0047] For example, such as Figures 1 to 3 As shown, the first link 31, the third link 33, and the fourth link 34 are rotatably connected end-to-end to form a triangular structure. This not only allows the third link 33 and the fourth link 34 to be relatively fixed to the first link 31 so that they rotate with the opening and closing of the door, but also improves the structural strength of the connection between the fifth link 35 and the hinge movable plate 20, disperses the force, and improves the operational stability of the link hinge mechanism 1. It is understood that in other examples of this application, the first link 31, the third link 33, and the fourth link 34 may not be connected end-to-end. For example, the third link 33 or the fourth link 34 may be rotatably connected to the middle of the first link 31, or the fourth link 34 may be rotatably connected to the middle of the third link 33, etc., as long as at least one triangular space can be formed. This application will not elaborate further on this.

[0048] Optionally, such as Figure 2 and Figure 3 As shown, the third link 33, the fourth link 34, and the fifth link 35 are coaxially pivotally connected, meaning they can be rotatably connected together via the same pin. This allows the fifth link 35 to distribute the force of the elastic component 40 onto the third link 33 and the fourth link 34, enhancing stability. It is understood that in other examples of this application, the fifth link 35 may also be connected independently to either the third link 33 or the fourth link 34; this will not be elaborated further.

[0049] Optionally, such as Figure 2 and Figure 3As shown, the fifth link 35 is located between the third link 33 and the fourth link 34, such that the force exerted by the fifth link 35 on the pin is between the forces exerted by the third link 33 and the fourth link 34 on the pin, preventing the pin from becoming misaligned and jammed due to uneven force. It is understood that in other examples of this application, the fifth link 35 may also be located outside the third link 33 and the fourth link 34, that is, on the side away from the housing assembly 2, to avoid structural interference between the fifth link 35 and the housing assembly 2 during door opening and closing.

[0050] It is worth noting that, in one modified example of this application, such as Figure 4 As shown, the first link 31, the third link 33, and the fourth link 34 of this application can also be manufactured from the same rod to ensure the fixed reliability of the third link 33 and the fourth link 34 relative to the first link 31.

[0051] Furthermore, according to the above embodiments of this application, such as Figure 5 and Figure 6 As shown, the second link 32 can be located above the first link 31, and the front and rear ends of the first link 31 are pivotally connected to the hinge movable plate 20 and the hinge fixed plate 10, respectively. This allows the front rotation center of the first link 31 and the front rotation center of the second link 32 to be spaced apart on the hinge movable plate 20, and the rear rotation center of the first link 31 and the rear rotation center of the second link 32 to be spaced apart on the hinge fixed plate 10, forming a four-bar linkage. Thus, during the opening process of the door box device, the rotation center of the door assembly 3 will move from the rear rotation center of the first link 31 towards the rear rotation center of the second link 32, causing the rotation center of the door assembly 3 to rise as the opening angle increases. It is understood that the front and rear ends of the first link 31 can be, but are not limited to, connected to the hinge movable plate 20 and the hinge fixed plate 10 respectively by pins to achieve the required rotatable connection; similarly, the front and rear ends of the second link 32 can be, but are not limited to, connected to the hinge movable plate 20 and the hinge fixed plate 10 respectively by pins to achieve the required rotatable connection.

[0052] In other words, compared to the fixed-axis rotation of existing hinge spring systems, the linkage hinge mechanism 1 of this application can raise the lower edge height of the door assembly 3 when the door is opened, thereby reducing the cutting amount of the kick plate. That is, the linkage hinge mechanism 1 of this application can reduce the cutting amount of the kick plate while expanding the cavity capacity of the box assembly 2 and improving the cavity sealing effect. This makes the gap between the door assembly 3 and the kick plate smaller when the door box equipment is in the closed state, which helps to achieve the aesthetics of the embedded installation of the door box equipment.

[0053] Optionally, such as Figures 1 to 6 As shown, the front end of the first link 31 is coaxially pivotally connected to the hinge movable plate 20 and the fourth link 34, and the rear end of the first link 31 is coaxially pivotally connected to the hinge fixed plate 10 and the third link 33; the third link 33 is rotatably connected to the fourth link 34 so as to form a stable triangular structure without the need for fasteners, ensuring that the third link 33 and the fourth link 34 are relatively fixed to the first link 31 so as to rotate synchronously with the first link 31 during the opening and closing of the door.

[0054] In particular, such as Figure 5 and Figure 6 As shown, during the opening process, the third link 33 and the fourth link 34 move counterclockwise around the rear rotation center of the first link 31, while during the closing process, the third link 33 and the fourth link 34 move clockwise around the rear rotation center of the first link 31. That is to say, during the opening or closing process, the third link 33 and the fourth link 34 perform unidirectional circular motion to ensure that the action of the elastic component 40 is synchronized with the movement of the third link 33 and the fourth link 34, and thus synchronized with the opening and closing action of the door assembly 3, thereby improving the overall operational stability of the linkage hinge mechanism 1.

[0055] Optionally, such as Figure 1 , Figure 5 as well as Figure 6 As shown, the third link 33 is rotatably disposed on the inner side of the hinge movable plate 20, and the fourth link 34 is movably disposed on the outer side of the hinge movable plate 20, so that the third link 33 is rotatably disposed between the hinge movable plate 20 and the hinge fixed plate 10, and the hinge movable plate 20 is located between the third link 33 and the fourth link 34, so as to ensure that neither the third link 33 nor the fourth link 34 interferes with the second link 32. At the same time, it can also ensure that a suitable stable gap (approximately the thickness of the hinge fixed plate 10) is reserved between the third link 33 and the housing assembly 2. This can avoid structural interference or friction between the third link 33 and the housing assembly 2 due to the gap being too small, and can also avoid the overall size of the door cabinet equipment becoming larger due to the gap being too large.

[0056] Optionally, such as Figure 1 , Figure 5 as well as Figure 6As shown, the hinge movable plate 20 includes a movable plate body 21 for fixing the door assembly 3 and a limiting part 22 extending rearward from the movable plate body 21 and located between the third link 33 and the fourth link 34; wherein the limiting part 22 passes through the third link 33 and the fourth link 34 during the opening process and abuts against the hinge fixing plate 10 when the door is opened, so as to limit the maximum opening angle of the door assembly 3 to around 90°.

[0057] According to the above embodiments of this application, as Figures 1 to 6 As shown, the elastic component 40 may include a sliding member 41 rotatably connected to the fifth link 35 and slidably disposed on the housing assembly 2, and an elastic member 42 installed on the housing assembly 2; the elastic member 42 is connected to the sliding member 41 and is used to accumulate or release elastic potential energy when the fifth link 35 drives the sliding member 41 to slide relative to the housing assembly 2, so that the magnitude of the torque applied by the elastic component 40 to the hinge movable plate 20 through the link assembly 30 can be changed, in order to cooperate with the change of the gravitational torque of the door assembly 3 itself, so as to realize the door suspension at multiple angles.

[0058] For example, such as Figures 1 to 6 As shown, the elastic component 40 also includes a guide 43 for being disposed on the housing assembly 2 and extending back and forth. The sliding member 41 is movably connected to the guide 43 for sliding back and forth relative to the housing assembly 2 under the guidance of the guide 43. The elastic member 42 is implemented as a tension spring 420 with its rear end fixedly connected to the sliding member 41. Thus, as... Figure 5 and Figure 6 As shown, during the opening process, the hinge movable plate 20 rotates clockwise with the door assembly 3, driving the first link 31 to drive the third link 33 and the fourth link 34 to rotate counterclockwise. In turn, the fifth link 35 pushes the sliding member 41 to slide backward relative to the box assembly 2, stretching the tension spring 420 to accumulate elastic potential energy. At this time, under the action of the tension spring 420, the torque applied by the fifth link 35 to the hinge movable plate 20 through the third link 33 and the fourth link 34 gradually increases, so as to overcome the gradually increasing gravitational torque and achieve multi-angle suspension.

[0059] Similarly, such as Figure 6 and Figure 5As shown, during the closing process, the hinge movable plate 20 rotates counterclockwise with the door assembly 3, driving the first link 31 to drive the third link 33 and the fourth link 34 to rotate clockwise. This, in turn, causes the fifth link 35 to pull the sliding member 41 forward relative to the housing assembly 2, compressing the tension spring 420 to release elastic potential energy. At this time, under the action of the tension spring 420, the torque exerted by the fifth link 35 on the hinge movable plate 20 through the third link 33 and the fourth link 34 gradually decreases, thus overcoming the gradually decreasing gravitational torque and achieving multi-angle hovering. It is understood that in other examples of this application, the elastic member 42 can also be implemented as a compression spring, which will not be elaborated upon further.

[0060] It is worth noting that the guide member 43 mentioned in this application can be implemented as a guide rail or guide rod installed on the housing assembly 2, or it can be implemented as a guide groove opened on the housing assembly 2, as long as it can guide the sliding member 41 to slide back and forth. This application will not elaborate further on this.

[0061] In addition, the front end of the tension spring 420 is adjustablely connected to the housing assembly 2 so that the preload of the tension spring 420 can be adjusted by adjusting the position of the front end of the tension spring 420, thereby adapting to the weight changes of the door assembly 3 and meeting the suspension requirements of doors of different weights.

[0062] Optionally, such as Figures 2 to 6 As shown, the elastic component 40 also includes a snap-fit ​​plate 44 that snaps into the front end of the tension spring 420 and an adjusting screw 45 that is threadedly connected to the snap-fit ​​plate 44 and rotatably mounted on the base of the housing assembly 2. This allows the front end of the tension spring 420 to be adjustablely connected to the front of the base via the snap-fit ​​plate 44 and the adjusting screw 45. Thus, for door assemblies 3 of different weights, the linkage hinge mechanism 1 of this application only needs to adjust the preload of the tension spring 420 via the adjusting screw 45 to meet the torque balance requirements for door suspension of different weights. Furthermore, after adjusting to accommodate door assemblies of different weights, it can still achieve automatic opening and closing of the door at all angles.

[0063] Understandably, the elasticity of the tension spring 420 will decrease after a period of use. At this time, the preload of the tension spring 420 can be adjusted by the adjusting screw 45 to still meet the torque balance requirements for door suspension. In addition, since the front end of the tension spring 420 can be adjustablely connected to the front of the base of the cabinet assembly 2 through the snap-fit ​​plate 44 and the adjusting screw 45, the adjusting screw 45 can be exposed on the front side of the cabinet assembly 2. This allows the preload of the tension spring 420 to be adjusted by turning the adjusting screw 45 without pulling the door cabinet out of the cabinet, thus meeting the suspension requirements of different door weights.

[0064] It is worth mentioning that, according to another aspect of this application, such as Figure 7 and Figure 8 As shown, one embodiment of this application can further provide an automatic door opening and closing device, which may include the above-mentioned linkage hinge mechanism 1 and drive mechanism 50. The drive mechanism 50 drives the elastic component 40 connected to the linkage hinge mechanism 1 to adjust the magnitude and direction of the torque applied by the linkage component 30 to the hinge movable plate 20.

[0065] Thus, as Figures 5 to 7 As shown, when the door needs to be opened, the drive mechanism 50 can drive the sliding member 41 of the elastic component 40 to slide backward, so as to pull the hinge movable plate 20 through the linkage assembly 30. This causes the hinge movable plate 20 to apply a pushing torque to the door body assembly 3 in the same direction as the gravitational torque, thereby overcoming the friction or door lock resistance of the door body assembly 3 in the initial stage of opening the door, and avoiding the inability to achieve automatic opening at a small angle due to the small gravitational torque of the door body assembly 3. Subsequently, as the opening angle increases, the gravitational torque of the door body assembly 3 continues to increase. At this time, the drive mechanism 50 can limit the backward sliding speed of the sliding member 41, so as to push the hinge movable plate 20 through the linkage assembly 30, so that the hinge movable plate 20 applies a pulling torque to the door body assembly 3 in the opposite direction to the gravitational torque, preventing the door box equipment from colliding or causing safety hazards due to excessive opening speed.

[0066] Similarly, when the door needs to be closed, the linkage assembly 30 pushes the hinge movable plate 20 under the drive of the drive mechanism 50, so that the hinge movable plate 20 applies a pulling torque to the door assembly 3 that is opposite to the direction of the gravitational torque and greater than the gravitational torque, thereby overcoming the gravitational torque of the door assembly 3 itself and realizing automatic closing.

[0067] It is worth noting that, since the automatic door opening and closing device of this application rigidly connects the drive mechanism 50 and the hinge movable plate 20 through the linkage assembly 30, even if the door assembly 3 cannot overcome friction and door lock interference due to its small weight when opening at a small angle, the automatic door opening and closing device of this application can pull the hinge movable plate 20 through the linkage assembly 30 to facilitate opening, thereby ensuring that the action of the drive mechanism 50 and the action of the door assembly 3 remain synchronized during the automatic door opening and closing process, effectively avoiding door shaking and improving the stability of automatic door opening and closing.

[0068] Furthermore, compared to the pull-rope drive system, the automatic door opening and closing device of this application not only avoids the problem of asynchronous motor operation and door operation caused by pull rope loosening / slackening, but also avoids the limitation of unidirectional force transmission of the pull rope by always acting on the hinge movable plate 20 through the linkage assembly 30, and there is no need to set up guide wheel group and tensioning mechanism, so as to reduce the requirements for installation space, which is more friendly to the structural design of door box equipment.

[0069] In particular, the drive mechanism 50 of this application does not require a large power output; it only needs to provide a small driving force to disrupt the torque balance. This reduces the requirements for the drive mechanism, helps to lower costs, and facilitates implementation. Furthermore, even when the drive mechanism 50 is not in operation, the manual opening and closing of the door box assembly with the hovering function can still be completed; that is, the automatic door opening and closing device of this application can meet both manual and fully automatic door opening and closing needs.

[0070] For example, such as Figure 7 As shown, the guide member 43 in the elastic component 40 can be implemented as a lead screw 430 threadedly connected to the slider 41; the drive mechanism 50 may include a drive motor 51 driven by the lead screw 430. Thus, when the door needs to be opened, the lead screw 430 rotates forward under the drive of the drive motor 51, causing the slider 41 to slide backward along the lead screw 430 to pull the fifth link 35 backward for automatic door opening; and when the door needs to be closed, the lead screw 430 rotates in the opposite direction under the drive of the drive motor 51, causing the slider 41 to slide forward to push the fifth link 35 forward for automatic door closing.

[0071] Optionally, such as Figure 7 and Figure 3 As shown, the sliding member 41 includes a nut seat 411 fitted onto the lead screw 430, a threaded connector 412 extending forward from the nut seat 411, and a pivot 413 protruding from the nut seat 411 and perpendicular to the threaded connector 412; the threaded connector 412 is screwed into the rear end of the tension spring 420; one end of the fifth connecting rod 35 is rotatably fitted onto the pivot 413. Thus, when the sliding member 41 slides back and forth along the lead screw 430, the tension spring 420 undergoes axial deformation under the action of the threaded connector 412, thereby improving the deformation stability of the tension spring 420.

[0072] Optionally, such as Figure 7 and Figure 3As shown, the sliding member 41 also includes a roller 414 protruding from the nut seat 411 for rolling abutting against the housing assembly 2. Thus, when the lead screw 430 rotates under the drive of the drive motor 51, the nut seat 411 of the sliding member 41 moves back and forth along the lead screw 430 to push and pull the fifth connecting rod 35, causing the torque applied by the connecting rod assembly 30 to the door assembly 3 to increase or decrease, thereby breaking the torque balance and realizing the automatic opening and closing of the door housing device. Simultaneously, the roller 414 enables the friction between the nut seat 411 and the housing assembly 2 to be implemented as rolling friction, helping to reduce the frictional force between the sliding member 41 and the housing assembly 2, reducing operating noise, and improving the operational stability of the automatic door opening and closing device.

[0073] It is worth noting that, such as Figure 7 and Figure 8 As shown, the fifth link 35 is a two-force member, and the force F1 acting on the fifth link 35 extends along the direction of the link body. Since the force F1 exerted by the drive motor 51 and the tension spring 420 on the third link 33 and the fourth link 34 through the fifth link 35 is the resultant force of the tension spring force P, the frictional force f, the motor load force F, and the supporting force N, i.e., F1 = (P ± f ± F) / cosɑ, where ɑ is the angle between the fifth link 35 and the lead screw 430, which is usually greater than 10°, the force F1 > P ± f ± F. That is, the force exerted by the drive motor 51 and the tension spring 420 on the fifth link 35 is greater than the motor load force F ± tension spring force P. In other words, when the required force F1 exerted through the fifth link 35 is the same, the automatic door opening and closing device of this application requires a smaller motor load force F ± tension spring force P than the pull rope drive system, which reduces the requirement for electrode load force, making it more feasible and cheaper.

[0074] Preferably, such as Figure 7 and Figure 8 As shown, when the door is closed, the angle α between the fifth link 35 and the lead screw 430 is greater than or equal to 20°, so as to further reduce the load force required on the electrode.

[0075] Furthermore, since the fifth link 35 acts directly on the third link 33 and the fourth link 34, and the connection points of the third link 33 and the fourth link 34 relative to the hinge plate 20 are not heavily restricted, the lever arm of force F1 relative to the door assembly 3 can be set relatively large. It is understood that the gravitational torque of the door assembly 3 is mainly balanced by the clockwise torque acting on the first link 31 to prevent the door assembly 3 from driving the first link 31 to rotate counterclockwise under its own weight; and the clockwise torque on the first link 31 is mainly provided by force F1. When the lever arm of force F1 can be set larger, the force F1 required for automatic opening and closing of the door assembly 3 of the same weight is smaller. This is extremely important for reducing the load on the motor, making it more feasible and cost-effective.

[0076] According to the above embodiments of this application, the drive mechanism 50 may further include a Hall sensor built into the drive motor 51 for detecting the rotational speed signal of the motor in both forward and reverse directions. Thus, during automatic door opening and closing, if the user blocks the door assembly 3 with their hand, causing the motor load to increase and the speed to decrease, the Hall sensor will output a signal to control the drive motor 51 to stop. When the door assembly 3 is in a suspended state, if the user manually opens or closes the door at a small angle, the linkage assembly 30 will drive the drive motor 51 to move. The Hall sensor can then detect the Hall signal indicating the motor's change from stationary to rotating, thereby controlling the drive motor 51 to move in the same direction as the user's movement, achieving automatic door opening and closing during user interaction.

[0077] It is worth noting that, for conventional pull-cord drive systems, when a user manually closes the door, the friction of the lead screw and the starting torque of the motor are greater than the torque generated by the tension spring, making it difficult to respond to the door's movement in a timely manner. This causes the pull cord to slacken, making the interaction unreliable and requiring additional sensors to detect the user's intent, thus increasing costs. However, in the automatic door opening and closing device of this application, when the user manually opens and closes the door, the door assembly 3 is always rigidly connected to the drive motor 51 through the hinge plate 20, the first link 31, the third link 33, the fourth link 34, the fifth link 35, the sliding member 41, and the lead screw 430. This ensures that the door movement and the motor movement are always synchronized, guaranteeing that the Hall sensor can synchronously perceive the user's interaction intent. This allows for a rapid response, improving the user experience, eliminating the need for additional sensors, reducing costs, and increasing feasibility.

[0078] Furthermore, each door unit can contain one or two automatic door opening / closing devices to automatically open or close individual door components. For example, in one example of this application, two automatic door opening / closing devices can be located on the left and right sides of the door component 3, respectively, to cooperate in achieving automatic door opening and closing; or, in another example of this application, an automatic door opening / closing device and a pull-rope drive system (or a linkage hinge mechanism 1) can be arranged on the left and right sides of the door component 3, respectively, so that automatic door opening and closing can also be achieved through the cooperation of the two, which will not be elaborated further in this application.

[0079] 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.

[0080] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application's patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A linkage mechanism, characterized in that, include: Hinge fixing plate, used to fix it to the housing assembly; Hinge plate, used to fix to the door assembly; A linkage assembly includes a first link rotatably connected at both ends to the hinge fixed plate and the hinge movable plate, a second link spaced apart from the first link and rotatably connected at both ends to the hinge fixed plate and the hinge movable plate, a third link extending upward from the first link, a fourth link extending from the first link to the third link, and a fifth link rotatably connected to the third link and / or the fourth link. as well as An elastic component, connected to the fifth link, is used to apply a torque to the hinge plate through the link assembly that is opposite to the gravitational torque of the door assembly.

2. The linkage mechanism according to claim 1, characterized in that, The first link, the third link, and the fourth link are rotatably connected end to end to form a triangular structure.

3. The linkage mechanism according to claim 1, characterized in that, The third link, the fourth link, and the fifth link are coaxially pivotally connected.

4. The linkage mechanism according to claim 1, characterized in that, The second link is located above the first link; wherein the front end of the first link is coaxially pivotally connected to the hinge movable plate and the fourth link, and the rear end of the first link is coaxially pivotally connected to the hinge fixed plate and the third link, and the third link is rotatably connected to the fourth link.

5. The linkage mechanism according to any one of claims 1 to 4, characterized in that, The elastic component includes a slider rotatably connected to the fifth link and slidably disposed on the housing assembly, and an elastic element for mounting on the housing assembly. The elastic element is connected to the slider and is used to accumulate or release elastic potential energy when the fifth link drives the slider to slide relative to the housing assembly.

6. The linkage mechanism according to claim 5, characterized in that, The elastic component also includes a guide extending forward and backward, and the sliding member is movably connected to the guide for sliding forward and backward relative to the housing assembly under the guidance of the guide; the elastic member is a tension spring whose rear end is fixedly connected to the sliding member.

7. An automatic door opening and closing device, characterized in that, include: The linkage mechanism as described in any one of claims 1 to 6; and A drive mechanism drives an elastic component connected to the linkage mechanism to adjust the magnitude and direction of the torque applied by the linkage component of the linkage mechanism to the hinge plate of the linkage mechanism.

8. The automatic door opening and closing device according to claim 7, characterized in that, The guide of the elastic component is a lead screw that is threadedly connected to the sliding component of the elastic component; the driving mechanism is a drive motor that is drivenly connected to the lead screw.

9. The automatic door opening and closing device according to claim 8, characterized in that, The drive motor has a built-in Hall sensor.

10. A door-mounted equipment, characterized in that, include: Enclosure assembly; Door components; as well as The linkage hinge mechanism as described in any one of claims 1 to 6, wherein the linkage hinge mechanism is disposed between the housing assembly and the door assembly.

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