Pull-down door hinge assembly and cooking equipment

Abstract

The invention provides a pull-down door hinge assembly and cooking equipment, the cooking equipment comprises a box body and a door body, the pull-down door hinge assembly comprises a hinge arm, a hinge shell and a connecting rod assembly, and the hinge arm is used for being connected with the box body; the hinge shell is connected with the door body; the hinge shell rotates between a folding position and an unfolding position relative to the hinge arm, the distance between the hinge shell and the hinge arm is L1 in the folding position, the distance between the hinge shell and the hinge arm is L2 in the unfolding position, and L2 is larger than L1; the hinge shell is further provided with a lifting position, the lifting position is located between the folding position and the unfolding position, the top face or the bottom face of the hinge arm serves as a reference face, the height of the hinge shell at the folding position is lower than that of the hinge shell at the lifting position, and the height of the hinge shell at the unfolding position is lower than that of the hinge shell at the lifting position. Through cooperation of the connecting rod assembly, the hinge arm and the hinge shell, the door body can move upwards firstly and then downwards, and the door body cannot interfere with the refrigerator body in the opening and closing process.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically, to a pull-down door hinge assembly and a cooking device. Background Technology

[0002] In related technologies, such as Figure 1 and Figure 2 As shown, in the cooking device 100', the hinge is installed on the door 102'. The door 102' rotates around a fixed axis with a fixed rotation radius. A gap of more than 15.5mm needs to be reserved between the bottom of the door 102' and the box 104' to avoid interference between the door and the box 104'. The existence of the bottom gap not only affects the appearance of the product, but also affects the user experience. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, in a first aspect, the present invention provides a pull-down door hinge assembly.

[0005] Secondly, the present invention proposes a cooking device.

[0006] According to a first aspect of the present invention, the pull-down door hinge assembly provided by the present invention is used in a cooking device, the cooking device including a housing and a door, the door being used to open or close the housing, the pull-down door hinge assembly including a hinge arm, a hinge housing, and a connecting rod assembly, wherein the hinge arm is used to connect to the housing; the hinge housing is used to connect to the door; the connecting rod assembly is connected to the hinge arm and the hinge housing, the hinge housing rotating relative to the hinge arm between a folded position and an unfolded position via the connecting rod assembly, in the folded position the distance between the hinge housing and the hinge arm is L1, and in the unfolded position the distance between the hinge housing and the hinge arm is L2, L2 > L1; the hinge housing also has a raised position, the raised position being located between the folded position and the unfolded position, with the top or bottom surface of the hinge arm as a reference plane, the height of the hinge housing in the folded position being lower than the height in the raised position, and the height of the hinge housing in the unfolded position being lower than the height in the raised position.

[0007] The pull-down door hinge assembly proposed in this invention is used in cooking equipment. The cooking equipment includes a cabinet and a door. The door is used to open or close the cabinet. Users can open the cabinet through the door to take out or put food into the cabinet, or close the cabinet through the door to create a closed cooking space inside the cooking equipment for cooking food.

[0008] The pull-down door hinge assembly enables the door to open by changing its track, thereby avoiding interference between the door and the housing. Specifically, the pull-down door hinge assembly includes a hinge arm, a hinge housing, and a connecting rod assembly.

[0009] The hinge arm is used to connect to the cabinet and serves as a fixed point for the door to rotate.

[0010] The hinge housing is used to connect to the door body. The hinge housing encloses the internal linkage assembly and is connected to the hinge arm via the linkage assembly. The linkage assembly is the key component for realizing the door's specific movement trajectory.

[0011] The hinge housing rotates relative to the hinge arm between the folded and unfolded positions via a linkage assembly. In the folded position, the door is fully closed, and the minimum distance between the hinge housing and the hinge arm is L1. At this time, the door is pressed tightly against the cabinet, forming a closed cooking space.

[0012] In the unfolded position, when the cabinet needs to be opened, the user pulls the door, causing the hinge housing to rotate relative to the hinge arm via the linkage assembly. In the unfolded position, the distance between the hinge housing and the hinge arm is L2, where L2 > L1. The hinge housing also has a raised position, which is located between the folded and unfolded positions. With the top or bottom surface of the hinge arm as the reference plane, the height of the hinge housing in the folded position is lower than the height in the raised position, and the height of the hinge housing in the unfolded position is lower than the height in the raised position.

[0013] The pull-down door hinge assembly proposed in this invention allows the user to open the appliance by pulling the door, causing the hinge housing to rotate relative to the hinge arm via a connecting rod assembly. During this process, the door first moves upwards, then outwards and downwards until it reaches the fully open position. At this point, the maximum distance between the hinge housing and the hinge arm is L2, where L2 > L1. During the transition from the closed to the open state, there is a raised position where the hinge housing reaches its highest point relative to the hinge arm. This design allows the door to first rise a certain height before moving outwards and downwards, thus avoiding interference with the appliance during opening. No gap or only a small gap is needed between the door and the appliance to achieve interference-free opening, resulting in a more aesthetically pleasing and cleaner appearance for the cooking appliance.

[0014] In summary, the pull-down door hinge assembly proposed in this invention, through the cooperation of the connecting rod assembly, hinge arm, and hinge housing, achieves an upward-then-down movement trajectory of the door body. The door body does not interfere with the cabinet during opening and closing, ensuring safety and convenience. The aforementioned movement trajectory design also makes the door opening and closing process smoother, reducing resistance and noise, and improving the user experience. The pull-down door hinge assembly is suitable for various sizes of cooking equipment, exhibiting wide applicability. It allows for interference-free opening between the door and cabinet without requiring a gap or with only a small gap, resulting in a more aesthetically pleasing and cleaner appearance for the cooking equipment.

[0015] In addition, the pull-down door hinge assembly according to the above-described technical solution provided by the present invention may also have the following additional technical features:

[0016] In some technical solutions of the present invention, optionally, the linkage assembly includes: a first linkage, a second linkage, a third linkage, and a fourth linkage, wherein the first end of the first linkage is rotatably connected to the hinge arm; the first end of the second linkage is rotatably connected to the second end of the first linkage, and the second end of the second linkage is rotatably connected to the hinge housing; the first end of the third linkage is rotatably connected to the hinge arm, and the third linkage is rotatably connected to the second linkage; the first end of the fourth linkage is rotatably connected to the second end of the third linkage, and the second end of the fourth linkage is rotatably connected to the hinge housing.

[0017] In this technical solution, the structure of the linkage assembly is designed. Specifically, the linkage assembly includes a first link, a second link, a third link, and a fourth link. The four-link linkage assembly in the pull-down door hinge system can ensure that the door has a specific movement trajectory during opening and closing, while avoiding interference with the cabinet.

[0018] One end of the first link is rotatably connected to the hinge arm, and the other end is connected to the second link. The first link can rotate relative to the hinge arm.

[0019] One end of the second link is rotatably connected to the end of the first link, and the other end is connected to the hinge housing and rotatably connected to the third link.

[0020] One end of the third link is rotatably connected to the hinge arm, the other end is connected to the fourth link, and the middle part is rotatably connected to the second link.

[0021] One end of the fourth link is rotatably connected to the end of the third link, and the other end is connected to the hinge housing.

[0022] The four-bar linkage design makes the door move more smoothly and steadily. Due to the rotational connection and length relationship between the links, the door's movement trajectory during opening and closing is smooth, reducing friction and resistance and improving the user experience.

[0023] In some technical solutions of the present invention, the linkage assembly may optionally include: a first pin and a pad, wherein the first link and the second link are rotatably connected by the first pin; the pad is sleeved on the first pin and is located between the first link and the second link.

[0024] In this technical solution, the connecting rod assembly also includes a first pin and a pad, which are rotating mating parts. The first connecting rod and the second connecting rod are rotatably connected through the first pin. The first pin serves as a rotating shaft connecting the first connecting rod and the second connecting rod, ensuring that the first connecting rod and the second connecting rod maintain their relative positions during rotation, allowing the first connecting rod and the second connecting rod to rotate around the pin.

[0025] A spacer is fitted onto the first pin, located between the first and second links. When the door begins to open or close, the first and second links rotate via the first pin. The spacer ensures smoother rotation between the first and second links, reducing problems caused by excessive friction and clearance. The spacer and the first pin ensure the stability and smoothness of the linkage assembly during operation.

[0026] In some technical solutions of the present invention, optionally, the linkage assembly further includes a fixing block, which is rotatably connected to the fourth linkage. The third linkage is provided with a fixing groove. When the fixing block is in the initial position, the fixing block is separated from the fixing groove. When the fixing block is in the limiting position, at least a portion of the fixing block is embedded in the fixing groove to restrict the rotation of the fourth linkage relative to the third linkage.

[0027] In this technical solution, the linkage assembly also includes a fixing block, which is used to restrict the rotation of the fourth link relative to the third link at a specific position.

[0028] The fixing block is rotatably connected to the fourth link, and the fixing groove is located on the third link for engaging with the fixing block. When the fixing block is in the limit position, at least a portion of it will be embedded in the fixing groove.

[0029] During the opening of the door, the user can rotate the fourth link, causing it to rotate relative to the third link. When the fixing block rotates to its limit position, at least a portion of it engages with the fixing groove of the third link. This engagement restricts further rotation of the fourth link relative to the third link, thus ensuring the door remains at that specific angle and does not continue to rotate.

[0030] By using a fixing block and a fixing groove, the door angle can be stably fixed at a specific position, preventing accidental movement or closure. In certain situations (such as when there are still hot items inside the cooking equipment), ensuring the door remains fully open increases safety. The design of the fixing block and fixing groove is generally simple, easy to implement and operate.

[0031] Optionally, in some technical solutions of the present invention, the fixing block is provided with a central hole, and the fixing block avoids the first end of the fourth link through the central hole, so that the fixing block can bypass the first end of the fourth link.

[0032] In this technical solution, a central hole is provided on the fixed block, located at the center of the fixed block, to avoid the first end of the fourth link. The design of the central hole ensures that the fixed block will not collide or interfere with the first end of the fourth link during rotation.

[0033] Optionally, in some technical solutions of the present invention, the fourth link is provided with a receiving groove, and when the fixing block is in the initial position, a part of the fixing block is received in the receiving groove.

[0034] In this technical solution, the fourth link in the linkage assembly is provided with a receiving groove. This receiving groove is able to accommodate a portion of the fixing block when the fixing block is in its initial position.

[0035] The design of the receiving groove ensures that the fixed block does not easily rotate relative to the fourth link during the movement of the linkage assembly, thus avoiding interference between the fixed block and other structures.

[0036] In some technical solutions of the present invention, optionally, the pull-down door hinge assembly further includes: a limiting part connected to the hinge housing, and a limiting groove provided on the second connecting rod. In the folded position, the limiting part is inserted into the limiting groove, and the limiting groove is used to restrict the hinge housing from rotating toward the hinge arm.

[0037] In this technical solution, the pull-down door assembly also includes a limiting part, which is connected to the hinge housing and is used to limit the rotation range of the hinge housing relative to the hinge arm.

[0038] The limiting groove is located on the second link. When the door is in the folded position, the limiting part will insert into the limiting groove to restrict the rotation of the hinge housing. The hinge housing is installed on the door, and the hinge arm is fixed to the door frame or fixed structure. The limiting part is connected to the hinge housing to ensure that it can function when needed.

[0039] Optionally, in some technical solutions of the present invention, the pull-down door hinge assembly further includes: a button assembly connected to the hinge housing, the button assembly being movable between a retracted position and an extended position; in the extended position, a portion of the button assembly extends out of the hinge housing to restrict the door from detaching from the hinge housing; in the retracted position, the button assembly extends into the hinge housing to release the restriction on the door.

[0040] In this technical solution, the pull-down door hinge assembly also includes a button assembly, the main function of which is to control the locking and unlocking between the door body and the hinge housing.

[0041] The hinge housing, as the main body of the entire hinge assembly, is connected to the door body. The button assembly is connected to the hinge housing. The button assembly can move between the retracted position and the extended position.

[0042] When in the retracted position, the button assembly extends into the hinge housing. At this time, the button assembly does not obstruct the normal opening and closing of the door and is in the unlocked state, allowing the door to detach from the hinge housing for easy disassembly.

[0043] In the extended position, a portion of the button assembly extends out of the hinge housing to prevent the door from detaching from the hinge housing, ensuring that the door remains in place when needed.

[0044] During the opening and closing of the door, the locked or unlocked state of the button component can be switched at any time by the user to meet different usage needs.

[0045] In some technical solutions of the present invention, optionally, the pull-down door hinge assembly further includes: a transmission rod, the first end of which is rotatably connected to a connecting rod assembly; a first elastic member, the first end of which is connected to the second end of the transmission rod, and the second end of which is connected to the hinge arm. In the folded position, the first elastic member is in a first state, and in the unfolded position, the first elastic member is in a second state; wherein, the deformation of the first elastic member in the second state is greater than that in the first state.

[0046] In this technical solution, the pull-down door hinge assembly also includes a transmission rod and a first elastic element, which work together to achieve smooth folding and hovering unfolding of the door.

[0047] The first end of the transmission rod is rotatably connected to the hinge arm, allowing the transmission rod to rotate as the hinge arm moves. The second end of the transmission rod is connected to the first elastic element; when the transmission rod rotates, it causes the first elastic element to deform accordingly.

[0048] The first end of the first elastic element is connected to the second end of the transmission rod, and the second end is connected to the hinge arm.

[0049] The first elastic element has different deformations in the two states. In the folded position, the first elastic element is in the first state, where the deformation is smaller. When in the folded position, the relative position between the transmission rod and the hinge arm means that the first elastic element does not need to bear too much tensile or compressive force, and the door can close smoothly.

[0050] In the unfolded position, the first elastic element is in the second state, where its deformation is greater than in the first state. This is because when the door changes from the folded position to the unfolded position, the transmission rod rotates at a certain angle relative to the hinge arm, which causes the first elastic element to undergo greater deformation to provide necessary support and cushioning.

[0051] As the door transitions from the folded to the unfolded position, the relative positions of the hinge arm and the drive rod change. This causes the first elastic element to gradually transition from a first state to a second state, with its deformation gradually increasing. During this process, the first elastic element provides the necessary resistance to ensure that the door unfolds smoothly and slowly, avoiding sudden impacts or rebounds.

[0052] Meanwhile, since the first elastic element has a large torque in the unfolded position, when the door attempts to move from the unfolded position to the folded position, the torque of the first elastic element will provide a reverse torque. When the first elastic element is extended, it provides a spring tension equal to the torque generated by the weight of the door, so as to enable the door to be suspended at any angle when it is open.

[0053] Conversely, as the door transitions from the unfolded position to the folded position, the first elastic element gradually returns from the second state to the first state, with its deformation gradually decreasing. During this process, the first elastic element releases the previously stored energy, helping the door fold more smoothly. During the door closing process, the first elastic element provides a spring force greater than the torque generated by the weight of the door when it retracts, enabling the door to close automatically.

[0054] In some technical solutions of the present invention, optionally, the hinge arm includes: a housing connected to the linkage assembly; an adjustment assembly connected to the housing, the second end of the first elastic member connected to the adjustment assembly, and the adjustment assembly being used to adjust the position of the second end of the first elastic member relative to the housing.

[0055] In this technical solution, for the specific structure of the hinge shell, the present invention provides that the hinge shell includes a housing and an adjustment component, which work together to adjust the position of the second end of the first elastic element.

[0056] The adjustment component is used to adjust the position of the second end of the first elastic element relative to the housing. This adjustment function allows users or installers to adjust the deformation range of the first elastic element according to factors such as the weight of the door and the frequency of use, thereby achieving smoother and more stable door opening and closing operations.

[0057] In some technical solutions of the present invention, optionally, the adjusting component includes: a mounting base connected to the housing; an adjusting rod connected to the mounting base, the position of the adjusting rod being adjustable relative to the mounting base, and the second end of the first elastic member being connected to the adjusting rod.

[0058] In this technical solution, the specific structure of the adjustment component is configured such that the adjustment component includes a mounting base and an adjustment rod, wherein the mounting base is connected to the housing, thereby connecting the adjustment component to the housing.

[0059] The adjusting rod is connected to the mounting base, and the position of the adjusting rod can be adjusted relative to the mounting base. The second end of the first elastic element is connected to the adjusting rod. The position of the mounting base relative to the housing is fixed. By adjusting the position of the adjusting rod, the position of the second end of the first elastic element can be easily changed, thereby adjusting the tension state of the first elastic element.

[0060] Optionally, in some technical solutions of the present invention, the pull-down door hinge assembly further includes: a second pin connected to a transmission rod, a first guide groove provided on the hinge arm, the second pin passing through the first guide groove, the first guide groove extending along the length direction of the hinge arm, and the second pin being used to slide along the first guide groove.

[0061] In this technical solution, the pull-down door hinge assembly also includes a second pin, which is connected to the transmission rod and can move synchronously with the transmission rod.

[0062] The hinge arm is provided with a first guide groove, and a second pin is inserted into the first guide groove. The first guide groove extends along the length of the hinge arm, and the second pin is used to slide along the first guide groove.

[0063] During the movement of the transmission rod and hinge arm, the first guide groove limits the second pin, allowing the transmission rod and hinge arm to move accordingly, thereby realizing the opening and closing of the door.

[0064] In some technical solutions of the present invention, optionally, the first connecting rod is provided with a sliding groove, the first end of the sliding groove is away from the hinge arm, in the unfolded position, the end of the transmission rod is located at the first end of the sliding groove, and in the folded position, the end of the transmission rod is located at the second end of the sliding groove; wherein, in the folded position, from the second end of the sliding groove to the first end of the sliding groove, the sliding groove is inclined in a direction away from the hinge housing, and the first elastic member is in a deformed state.

[0065] In this technical solution, a sliding groove is provided on the hinge arm. In the folded position, the sliding groove slopes away from the first elastic member from its first end to its second end. In the folded position, the end of the transmission rod is located at the first end of the sliding groove, and one end of the first elastic member is fixed relative to the first end of the sliding groove. In the unfolded position, the end of the transmission rod is located at the second end of the sliding groove, and one end of the first elastic member is fixed relative to the second end of the sliding groove. Because the position of one end of the first elastic member changes, even if the other end of the elastic member retracts, the first elastic member does not fully recover. That is, in the folded position, the first elastic member is in a deformed state. At this time, the elastic member provides a closing force to the door, thereby making the door close more tightly.

[0066] In some technical solutions of the present invention, optionally, the transmission rod includes: a transmission rod body, the first end of the transmission rod body being connected to a first elastic member; a third pin, connected to the second end of the transmission rod body, the third pin passing through a sliding groove; and a second roller, sleeved on the third pin, the second roller making rolling contact with the inner wall of the sliding groove.

[0067] In this technical solution, the transmission rod is specifically configured to include a transmission rod body, a fourth pin, and a second roller. The first end of the transmission rod body is connected to the first elastic element, thereby realizing the connection between the transmission rod as a whole and the first elastic element.

[0068] The fourth pin is connected to the second end of the transmission rod body, and the fourth pin passes through the sliding groove, that is, it is set in the sliding groove on the hinge arm.

[0069] During the movement of the hinge arm, the fourth pin moves within the sliding groove, causing the transmission rod body to shift and pull on the first elastic element, causing it to deform. Since the fourth pin is located within the sliding groove on the hinge arm, the first elastic element deforms in accordance with the direction of the hinge arm's movement. When the door opens, the first elastic element provides an elastic force equal to the torque generated by the weight of the door when it extends, enabling the door to be suspended at any angle.

[0070] During the closing process, the spring provides an elastic force that is greater than the torque generated by the weight of the door when it retracts, thus achieving automatic closing of the door.

[0071] The second roller is fitted onto the fourth pin and makes rolling contact with the inner wall of the sliding groove. Through the second roller, the sliding motion of the fourth pin is changed to rolling, which reduces friction and improves the smoothness of the fourth pin's movement.

[0072] In some technical solutions of the present invention, the pull-down door hinge assembly further includes: an elastic assist component connected to the hinge arm, the end of the elastic assist component abutting against the link assembly, and the elastic assist component being used to push the link assembly to provide a pushing force to the hinge housing to rotate to the folding position.

[0073] In this technical solution, the pull-down door hinge assembly also includes a spring-loaded assist component. The spring-loaded assist component is connected to the hinge arm, and its end abuts against the connecting rod assembly. This component provides a pushing force to rotate towards the folding position, assisting the door's closing action and ensuring a tighter closure.

[0074] In some technical solutions of the present invention, the elastic assist component includes: a fixed seat connected to the hinge arm; a push rod slidably connected to the fixed seat; a second elastic member, the first end of which is connected to the fixed seat, and the second end of which is connected to the push rod. The linkage assembly is provided with an arc-shaped surface, which can rotate relative to the push rod. When the push rod abuts against the arc-shaped surface, the second elastic member is in a deformed state to provide a pushing force to the hinge housing to rotate to the folding position. When the push rod separates from the arc-shaped surface, the second elastic member is in its original state.

[0075] In this technical solution, the structure of the elastic assist component is configured, including a fixed base, a push rod, and a second elastic element. The fixed base is connected to the hinge arm, providing a mounting base for the push rod and the second elastic element. The push rod is slidably connected to the fixed base and can slide up and down within the fixed base. The push rod interacts with the curved surface as it rotates, providing a pushing force for closing the door. The first end of the second elastic element is connected to the fixed base, and the second end is connected to the push rod. When the push rod abuts against the curved surface of the linkage assembly, the second elastic element is compressed or stretched, entering a deformed state, at which point it provides a pushing force to the hinge housing to rotate towards the folding position. When the push rod separates from the curved surface, the second elastic element returns to its original state, ready for the next deformation.

[0076] When the user opens the door, the hinge housing begins to rotate relative to the hinge arm. The arc-shaped surface on the linkage assembly rotates as the door opens, separating from the push rod. The second elastic element returns to its original state, ready to provide assistance for closing the door.

[0077] When the user closes the door, the curved surface on the linkage assembly begins to approach the push rod. As the curved surface contacts and abuts against the push rod, the second elastic element begins to compress or stretch, entering a deformed state. This deformation generates a pushing force towards the hinge housing, assisting the door in rotating to the folding position. As the door continues to close, the push rod gradually separates from the curved surface, and the second elastic element gradually returns to its original state.

[0078] The flexible assist component provides continuous pushing force during the closing process, making the closing process easier and smoother.

[0079] In some technical solutions of the present invention, optionally, the push rod includes: a rod body slidably connected to a fixed seat; a fourth pin shaft passing through the end of the rod body; and a first roller sleeved on the fourth pin shaft, the first roller being used for rolling contact with the arc-shaped surface.

[0080] In this technical solution, the push rod includes a rod body, a fourth pin, and a first roller. The rod body is slidably connected to a fixed base and can slide up and down within the fixed base. The fourth pin passes through the end of the rod body and is used to install and fix the first roller. The first roller is sleeved on the fourth pin and is used for rolling contact with the arc-shaped surface of the connecting rod assembly. This design reduces friction, making the contact between the push rod and the arc-shaped surface smoother, and also extending the service life of the assembly.

[0081] When the user opens the door, the hinge housing begins to rotate relative to the hinge arm. The arc-shaped surface on the linkage assembly rotates as the door opens, separating from the first roller of the push rod. The second elastic element returns to its original state, ready to provide assistance for closing the door.

[0082] When the user closes the door, the curved surface on the linkage assembly begins to approach the first roller of the push rod. As the curved surface contacts and abuts against the first roller, the second elastic element begins to compress or stretch, entering a deformed state. This deformation generates a pushing force towards the hinge housing, assisting the door in rotating to the folding position. As the door continues to close, the first roller gradually separates from the curved surface, and the second elastic element gradually returns to its original state.

[0083] The first roller on the push rod makes rolling contact with the arc-shaped surface of the linkage assembly, which significantly reduces friction and makes the opening and closing process of the door smoother.

[0084] The design of the flexible assist component provides a continuous and stable pushing force for the door to close, making the closing process easier and less strenuous.

[0085] By reducing friction and direct force application, the design of the resilient assist component helps extend the lifespan of door and hinge assemblies.

[0086] In some technical solutions of the present invention, a second guide groove is provided on the hinge housing, the second guide groove extends along the moving direction of the rod, and the fourth pin is inserted into the second guide groove.

[0087] In this technical solution, a second guide groove is provided on the hinge arm, extending along the moving direction of the rod, and a fourth pin passes through the end of the rod. The fourth pin is inserted into the second guide groove. When the user closes the door, the arc-shaped surface of the linkage assembly approaches the first roller of the push rod. When the arc-shaped surface contacts and abuts against the first roller, the push rod slides along the fixed seat, and the fourth pin moves within the second guide groove. The second elastic element begins to be compressed or stretched, entering a deformed state, generating a pushing force on the hinge arm, assisting the door to rotate to the folding position.

[0088] The second guide groove ensures that the push rod has a stable path during sliding, improving the stability and reliability of the entire assembly.

[0089] Secondly, the present invention provides a cooking device, including a housing and a door, the door being used to open or close the housing; a pull-down door hinge assembly, as described in any of the above technical solutions, is connected to the housing and the door.

[0090] The cooking device proposed in this invention, because it includes the pull-down door hinge assembly as described in any of the above technical solutions, has all the beneficial effects of the pull-down door hinge assembly as described in any of the above technical solutions.

[0091] The cooking equipment includes a housing and a door. The door is used to open or close the housing, thereby creating a cooking space or allowing users to take food out of the housing.

[0092] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0093] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0094] Figure 1 This shows one of the structural schematic diagrams of cooking equipment in the prior art;

[0095] Figure 2 This is the second schematic diagram of the structure of a cooking device in the prior art;

[0096] in, Figure 1 and Figure 2 The correspondence between the names of the attached figures and the part numbers is as follows:

[0097] 100' cooking equipment, 102' door, 104' cabinet.

[0098] Figure 3 One of the structural schematic diagrams of the pull-down door hinge assembly in an embodiment of the present invention is shown;

[0099] Figure 4 It shows Figure 3 An exploded view of the pull-down door hinge assembly shown.

[0100] Figure 5 This is one of the structural schematic diagrams of a pull-down door hinge assembly with the hinge housing in a folded position according to an embodiment of the present invention;

[0101] Figure 6 This is a second schematic diagram of the structure of a pull-down door hinge assembly with the hinge housing in the folded position according to an embodiment of the present invention;

[0102] Figure 7 This illustration shows one of the structural schematic diagrams of a pull-down door hinge assembly with the hinge housing between a folded position and an unfolded position, according to an embodiment of the present invention.

[0103] Figure 8 A second schematic diagram of a pull-down door hinge assembly with the hinge housing between a folded position and an unfolded position, as shown in an embodiment of the present invention, is illustrated.

[0104] Figure 9 A schematic diagram of the structure of a pull-down door hinge assembly with the hinge housing in the unfolded position is shown in an embodiment of the present invention;

[0105] Figure 10 It shows Figure 9 An enlarged view of the sliding door hinge assembly A shown;

[0106] Figure 11 A schematic diagram of the structure of the box and door in an embodiment of the present invention is shown.

[0107] in, Figures 3 to 11 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0108] 100 Pull-down door hinge assembly, 102 Hinge housing, 104 Adjustment assembly, 106 Mounting base, 108 Adjustment rod, 110 Hinge arm, 112 Housing, 114 First guide groove, 116 Second guide groove, 118 Link assembly, 120 Arc surface, 122 First link, 124 Sliding groove, 126 Second link, 128 Limiting groove, 130 Third link, 132 Fixing groove, 134 Fourth link, 136 Receiving groove, 138 First pin, 140 Pad, 142 Fixing block, 144 Center hole, 146 Limiting part, 148 Button assembly, 150 Transmission rod, 1 52 Transmission rod body, 154 Third pin, 156 Second roller, 158 First elastic element, 160 Elastic assist component, 162 Fixed seat, 164 Push rod, 166 Rod body, 168 Fourth pin, 170 First roller, 172 Second elastic element, 174 Fifth pin, 176 Sixth pin, 180 Mounting component, 182 Button fixing seat, 184 Third elastic element, 186 Button, 188 Seventh pin, 190 Eighth pin, 192 Ninth pin, 194 Second pin, 198 Tenth pin, 202 Bottom surface, 204 Top surface, 300 Box body, 400 Door body. Detailed Implementation

[0109] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0110] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0111] The following reference Figures 3 to 11 A pull-down door hinge assembly 100 and a cooking appliance are described according to some embodiments of the present invention.

[0112] like Figure 3 , Figure 4 , Figure 5 , Figure 10 and Figure 11As shown, in an embodiment of the present invention, a pull-down door hinge assembly 100 is provided. The pull-down door hinge assembly 100 is used in a cooking device, which includes a housing 300 and a door 400. The door 400 is used to open or close the housing 300. The pull-down door hinge assembly 100 includes a hinge arm 110, a hinge housing 102, and a connecting rod assembly 118. The hinge arm 110 is used to connect to the housing 300; the hinge housing 102 is used to connect to the door 400; and the connecting rod assembly 118 is connected to the hinge arm 110 and the hinge housing 102. The hinge housing 102 is connected to the connecting rod assembly 118. 18 rotates relative to the hinge arm 110 between a folded position and an unfolded position. In the folded position, the distance between the hinge housing 102 and the hinge arm 110 is L1, and in the unfolded position, the distance between the hinge housing 102 and the hinge arm 110 is L2, where L2 > L1. The hinge housing 102 also has a raised position, which is located between the folded position and the unfolded position. With the top surface 204 or bottom surface 202 of the hinge arm 110 as the reference surface, the height of the hinge housing 102 in the folded position is lower than the height in the raised position, and the height of the hinge housing 102 in the unfolded position is lower than the height in the raised position.

[0113] In this embodiment, the pull-down door hinge assembly 100 proposed in this invention is used in a cooking device. The cooking device includes a housing 300 and a door 400. The door 400 is used to open or close the housing 300. Users can open the housing 300 to take out ingredients from the housing 300 or put ingredients into the housing 300, or close the housing 300 to create a closed cooking space for cooking ingredients.

[0114] The pull-down door hinge assembly 100 enables the door 400 to open via a variable track, preventing interference between the door 400 and the housing 300. Specifically, the pull-down door hinge assembly 100 includes a hinge arm 110, a hinge housing 102, and a connecting rod assembly 118. The hinge arm 110 is used to connect to the housing 300, serving as a fixed point for the rotation of the door 400.

[0115] Specifically, the hinge arm 110 is made of a robust metal material, such as stainless steel or aluminum alloy. The hinge arm 110 is fixed to the housing 300 of the cooking appliance.

[0116] Specifically, the hinge arm 110 is provided with mounting holes, and the pull-down door hinge assembly 100 also includes a mounting member 180. The hinge arm 110 can be mounted on the housing 300 through the mounting member 180. Specifically, the mounting member 180 can be a screw or other fastener.

[0117] The hinge housing 102 is used to connect to the door body 400. The hinge housing 102 encloses the internal linkage assembly 118 and is connected to the hinge arm 110 through the linkage assembly 118. The linkage assembly 118 is the key part to realize the special movement trajectory of the door body 400.

[0118] The hinge housing 102 rotates relative to the hinge arm 110 between a folded position and an unfolded position via the linkage assembly 118, such as Figure 5 As shown, in the folded position, the door 400 is completely closed, and the minimum distance between the hinge housing 102 and the hinge arm 110 is L1. At this time, the door 400 is tightly attached to the box body 300, forming a closed cooking space.

[0119] In the unfolded position, when the cabinet 300 needs to be opened, the user pulls the door 400, causing the hinge housing 102 to rotate relative to the hinge arm 110 via the linkage assembly 118, as shown below. Figure 10 As shown, in the unfolded position, the distance between the hinge housing 102 and the hinge arm 110 is L2, where L2 > L1. The hinge housing 102 also has a raised position, which is located between the folded position and the unfolded position. With the top surface 204 or bottom surface 202 of the hinge arm 110 as the reference plane, the height of the hinge housing 102 in the folded position is lower than the height in the raised position, and the height of the hinge housing 102 in the unfolded position is lower than the height in the raised position.

[0120] The pull-down door hinge assembly 100 proposed in this invention allows the user to pull the door 400 when opening the housing 300, causing the hinge housing 102 to rotate relative to the hinge arm 110 via the connecting rod assembly 118. During this process, the door 400 first moves upwards, then outwards and downwards until it reaches a fully open position. At this point, the maximum distance between the hinge housing 102 and the hinge arm 110 is L2, and L2 > L1. During the transition from the closed to the open state, there is a raised position. At this position, the height of the hinge housing 102 relative to the hinge arm 110 reaches its highest point. This design allows the door 400 to first rise to a certain height before moving outwards and downwards, thereby avoiding interference with the housing 300 during the opening process.

[0121] In summary, the pull-down door hinge assembly 100 proposed in this invention, through the cooperation of the connecting rod assembly 118 with the hinge arm 110 and the hinge housing 102, and via an upward-then-down movement trajectory, ensures that the door 400 will not interfere with the housing 300 during opening and closing, thus guaranteeing safety and convenience. The aforementioned movement trajectory design also makes the opening and closing process of the door 400 smoother, reducing resistance and noise, and improving the user experience. The pull-down door hinge assembly 100 is suitable for various sizes of cooking equipment and has wide applicability.

[0122] Specifically, the trajectory of a point on the hinge housing 102 is as follows: Figure 9 and Figure 10 The trajectory of line B in the diagram is shown.

[0123] like Figure 3 , Figure 4 and Figure 10 As shown, in some embodiments of the present invention, optionally, the linkage assembly 118 includes: a first linkage 122, a second linkage 126, a third linkage 130, and a fourth linkage 134. The first end of the first linkage 122 is rotatably connected to the hinge arm 110; the first end of the second linkage 126 is rotatably connected to the second end of the first linkage 122, and the second end of the second linkage 126 is rotatably connected to the hinge housing 102; the first end of the third linkage 130 is rotatably connected to the hinge arm 110, and the second end of the third linkage 130 is rotatably connected to the second linkage 126; the first end of the fourth linkage 134 is rotatably connected to the second end of the third linkage 130, and the second end of the fourth linkage 134 is rotatably connected to the hinge housing 102.

[0124] In this embodiment, the structure of the linkage assembly 118 is configured such that the linkage assembly 118 includes a first linkage 122, a second linkage 126, a third linkage 130, and a fourth linkage 134. The four-link linkage assembly 118 in the pull-down door hinge assembly 100 can ensure that the door 400 has a specific movement trajectory during opening and closing, while avoiding interference with the housing 300.

[0125] One end of the first link 122 is rotatably connected to the hinge arm 110, and the other end is connected to the second link 126. The first link 122 is capable of rotating relative to the hinge arm 110.

[0126] Specifically, the first link 122 is a shorter link, and the link assembly 118 also includes a seventh pin 188. The first end of the first link 122 is connected to the mounting point on the hinge arm 110 through the seventh pin 188 or a similar rotating connector, and the first link 122 can rotate relative to the hinge arm.

[0127] One end of the second link 126 is rotatably connected to the end of the first link 122, and the other end is connected to the hinge housing 102 and rotatably connected to the third link 130.

[0128] Specifically, one end of the second link 126 is connected to the hinge housing 102 via the eighth pin 190.

[0129] One end of the third link 130 is rotatably connected to the hinge arm 110, the other end is connected to the fourth link 134, and the middle part is rotatably connected to the second link 126.

[0130] One end of the fourth link 134 is rotatably connected to the end of the third link 130, and the other end is connected to the hinge housing 102.

[0131] Specifically, one end of the fourth link 134 is connected to the hinge housing 102 via the ninth pin 192.

[0132] Specifically, the linkage assembly 118 also includes a tenth pin 198, and the first end of the third link 130 is connected to a mounting point on the hinge arm 110 via the tenth pin 198 or a similar rotary connector.

[0133] In the initial position, when the door 400 is closed, the door 400 is pressed against the housing 300. At this time, the first link 122, the second link 126, the third link 130 and the fourth link 134 of the linkage assembly 118 are all relatively close to the hinge arm 110 and are in a retracted state.

[0134] When the door 400 is opened, the user applies an outward force. This force first acts on the first link 122, causing it to rotate relative to the hinge arm 110. Due to the rotational connection between the first link 122 and the second link 126, the rotation of the first link 122 causes the second link 126 to rotate, and due to the length of the link and the position of the connection point, the second link 126 extends outward. Simultaneously, the third link 130 also begins to rotate. Its rotation, through the middle rotational connection point, pushes the second link 126 to extend further to the right, while also moving itself to the right. The fourth link 134 rotates along with the third link 130, causing its end to extend to the right, and connects to the hinge housing 102, thus moving the hinge housing 102 and the door 400.

[0135] During this process, due to the special design and connection of the four-bar linkage, the door 400 will first move upward a short distance. This is because, as the second link 126 and the fourth link 134 extend outward, they will also be raised at a certain angle due to the position of their connection points. Then, as the linkages continue to rotate and extend, the door 400 will gradually move outward and downward until it is fully open.

[0136] The upward and then downward movement trajectory of the door 400 ensures that the edge of the door 400 will not collide or interfere with the edge of the housing 300 during its opening process.

[0137] The four-bar linkage design makes the movement of the door 400 smoother and more stable. Due to the rotational connection and length relationship between the links, the movement trajectory of the door 400 during opening and closing is smooth, reducing friction and resistance and improving the user experience.

[0138] The closing process is the reverse of the opening process. The user applies an inward force, causing the door 400 to begin moving inward. The four linkages move in the opposite order and direction of rotation until the door 400 is fully closed.

[0139] like Figure 4 As shown, in some embodiments of the present invention, optionally, the linkage assembly 118 further includes a first pin 138 and a pad 140, the first link 122 and the second link 126 are rotatably connected by the first pin 138; the pad 140 is sleeved on the first pin 138 and is located between the first link 122 and the second link 126.

[0140] In this embodiment, the linkage assembly 118 further includes a first pin 138 and a pad 140. The first pin 138 and the pad 140 are rotatable fittings, and the first connecting rod 122 and the second connecting rod 126 are rotatably connected through the first pin 138. The first pin 138 serves as a rotation axis connecting the first connecting rod 122 and the second connecting rod 126, allowing the first connecting rod 122 and the second connecting rod 126 to maintain their relative positions during rotation, and enabling the first connecting rod 122 and the second connecting rod 126 to rotate around the pin.

[0141] A shim 140 is fitted onto the first pin 138, located between the first connecting rod 122 and the second connecting rod 126. The shim 140 can be used to adjust the clearance between the first connecting rod 122 and the second connecting rod 126, specifically creating a 1mm clearance between them to ensure smoother movement and reduce friction and noise. The shim 140 also acts as a buffer, reducing the impact force generated during the rotation of the connecting rods.

[0142] Specifically, during installation, the first pin 138 passes through the corresponding holes of the first connecting rod 122 and the second connecting rod 126, connecting the two together. The pad 140 is fitted onto the first pin 138 and is located between the first connecting rod 122 and the second connecting rod 126.

[0143] When the door 400 begins to open or close, the first link 122 and the second link 126 rotate via the first pin 138. Due to the presence of the pad 140, the rotational movement between the first link 122 and the second link 126 is smoother, reducing problems caused by excessive friction and clearance. The pad 140 and the first pin 138 ensure the stability and smoothness of the linkage assembly 118 during movement.

[0144] Specifically, the linkage assembly 118 also includes a fifth pin 174, through which the second link 126 and the third link 130 are rotatably connected. There are multiple pads 140, one of which is fitted onto the fifth pin 174 and is located between the second link 126 and the third link 130.

[0145] The linkage assembly 118 also includes a sixth pin 176, through which the third link 130 and the fourth link 134 are rotatably connected. There are multiple pads 140, one of which is fitted onto the sixth pin 176 and is located between the third link 130 and the fourth link 134.

[0146] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, in some embodiments of the present invention, optionally, the linkage assembly 118 further includes a fixing block 142, which is rotatably connected to the fourth link 134. The third link 130 is provided with a fixing groove 132. When the fixing block 142 is in the initial position, the fixing block 142 is separated from the fixing groove 132. When the fixing block 142 is in the limiting position, at least a portion of the fixing block 142 is embedded in the fixing groove 132 to restrict the fourth link 134 from rotating relative to the third link 130.

[0147] In this embodiment, the link assembly 118 further includes a fixing block 142, which is used to restrict the rotation of the fourth link 134 relative to the third link 130 at a specific position.

[0148] The fixing block 142 is rotatably connected to the fourth link 134, and the fixing groove 132 is located on the third link 130 for engaging with the fixing block 142. When the fixing block 142 is in the limit position, at least a portion of it will be embedded in the fixing groove 132.

[0149] Figure 7 and Figure 8 As shown, during the opening of the door 400, the user can rotate the fourth link 134, causing the fourth link 134 to rotate relative to itself. When the fixing block 142 rotates to the limit position, at least a portion of the fixing block 142 is engaged in the fixing groove 132 of the third link 130. This engagement restricts further rotation of the fourth link 134 relative to the third link 130, thereby ensuring that the door 400 remains at this specific angle and does not continue to rotate.

[0150] The fixing block 142 and the fixing groove 132 work together to stably fix the angle of the door 400 at a specific position, preventing it from moving or closing accidentally. In some cases (such as when there are still hot items inside the cooking equipment), ensuring that the door 400 remains fully open can increase safety. The design of the fixing block 142 and the fixing groove 132 is generally simple, easy to implement and operate.

[0151] like Figure 4As shown, in some embodiments of the present invention, optionally, the fixing block 142 is provided with a central hole 144, and the fixing block 142 avoids the first end of the fourth link 134 through the central hole 144, so that the fixing block 142 can bypass the first end of the fourth link 134.

[0152] In this embodiment, a central hole 144 is provided on the fixing block 142. The central hole 144 is located at the center of the fixing block 142 and is used to avoid the first end of the fourth link 134. The design of the central hole 144 ensures that the fixing block 142 will not collide or interfere with the first end of the fourth link 134 during rotation.

[0153] The fixing block 142 is fitted onto the fourth link 134 through its central hole 144, and is rotatably connected to the fourth link 134 by means of a pin, screw, or similar means. During installation, ensure that the position of the central hole 144 corresponds to the first end of the fourth link 134 so that the fixing block 142 can smoothly pass over the first end of the fourth link 134.

[0154] When the door 400 opens or closes, the fourth link 134 rotates. Since the fixing block 142 is rotatably connected to the fourth link 134, it rotates along with the fourth link 134. During rotation, the center hole 144 on the fixing block 142 ensures that the fixing block 142 can pass around the first end of the fourth link 134, preventing interference between the two.

[0155] When the door 400 moves to a certain angle, the fixing block 142 will move to its limit position. At this time, at least a part of the fixing block 142 will be embedded in the fixing groove 132 of the third link 130, thereby restricting the further rotation of the fourth link 134 relative to the third link 130.

[0156] During this process, the central hole 144 still serves to avoid the first end of the fourth link 134, ensuring that the fixing block 142 can be properly embedded into the fixing groove 132.

[0157] The design of the center hole 144 allows the fixing block 142 to bypass the first end of the fourth link 134, avoiding interference between the two and ensuring the smooth movement of the link assembly 118.

[0158] like Figure 4 As shown, in some embodiments of the present invention, optionally, the fourth link 134 is provided with a receiving groove 136, and when the fixing block 142 is in the initial position, a portion of the fixing block 142 is received in the receiving groove 136.

[0159] In this embodiment, the fourth link 134 in the link assembly 118 is provided with a receiving groove 136. This receiving groove 136 is able to receive a portion of the fixing block 142 when the fixing block 142 is in the initial position.

[0160] The design of the receiving groove 136 ensures that the fixed block 142 does not easily rotate relative to the fourth link 134 during the movement of the link assembly 118, thus avoiding interference between the fixed block 142 and other structures.

[0161] like Figure 4 As shown, in some embodiments of the present invention, optionally, the pull-down door hinge assembly 100 further includes: a limiting part 146 connected to the hinge housing 102, and a limiting groove 128 provided on the second connecting rod 126. In the folded position, the limiting part 146 is inserted into the limiting groove 128, and the limiting groove 128 is used to restrict the hinge housing 102 from rotating toward the hinge arm 110.

[0162] In this embodiment, the pull-down door assembly further includes a limiting part 146, which is connected to the hinge housing 102 and is used to limit the rotation range of the hinge housing 102 relative to the hinge arm 110.

[0163] The limiting groove 128 is located on the second connecting rod 126. When the door 400 is in the folded position, the limiting part 146 is inserted into the limiting groove 128 to restrict the rotation of the hinge housing 102. The hinge housing 102 is mounted on the door 400, while the hinge arm 110 is fixed to the door frame or a fixed structure. The limiting part 146 is connected to the hinge housing 102 to ensure that it can function when needed.

[0164] When the door 400 reaches the predetermined folding position, the limiting part 146 inserts into the limiting groove 128 on the second link 126. This process restricts the hinge housing 102 from continuing to rotate toward the hinge arm 110, thereby ensuring that the door 400 stays in the predetermined position and preventing the door 400 from excessively impacting the housing 300.

[0165] When the user operates the door 400 to open it, the limiting part 146 will be pulled out from the limiting groove 128.

[0166] The design of the limiting part 146 and the limiting groove 128 ensures the stability of the door 400 during opening and closing. The limiting function prevents the door 400 from accidentally over-closing, thereby increasing safety during use.

[0167] like Figure 3 and Figure 4As shown, in some embodiments of the present invention, optionally, the pull-down door hinge assembly 100 further includes: a button assembly 148 connected to the hinge housing 102, the button assembly 148 being movable between a retracted position and an extended position; in the extended position, a portion of the button assembly 148 extends out of the hinge housing 102 to restrict the door 400 from disengaging from the hinge housing 102; in the retracted position, the button assembly 148 extends into the hinge housing 102 to release the restriction on the door 400.

[0168] In this embodiment, the pull-down door hinge assembly 100 also includes a button assembly 148, the main function of which is to control the locking and unlocking between the door body 400 and the hinge housing 102.

[0169] The hinge housing 102 serves as the main body of the entire hinge assembly and is connected to the door body 400. The button assembly 148 is connected to the hinge housing 102. The button assembly 148 is movable between a retracted position and an extended position.

[0170] When in the storage position, the button assembly 148 extends into the hinge housing 102. At this time, the button assembly 148 does not obstruct the normal opening and closing of the door 400 and is in the unlocked state, allowing the door 400 to detach from the hinge housing 102, making it easy to disassemble the door 400.

[0171] In the extended position, a portion of the button assembly 148 extends out of the hinge housing 102 to prevent the door 400 from disengaging from the hinge housing 102, ensuring that the door 400 remains in place when needed.

[0172] During the opening and closing of the door 400, the locked or unlocked state of the button assembly 148 can be switched at any time by the user to meet different usage needs.

[0173] The locking function of the button assembly 148 prevents the door 400 from accidentally detaching from the hinge housing 102 when not in use, increasing safety. Users can easily switch the locked or unlocked state of the button assembly 148 with a simple operation.

[0174] Specifically, such as Figure 4 As shown, the button assembly 148 includes a button holder 182, a button 186, and a third elastic member 184. The button 186 and the third elastic member 184 are disposed on the button holder 182, and the button holder 182 is disposed on the hinge housing 102.

[0175] like Figure 4As shown, in some embodiments of the present invention, optionally, the pull-down door hinge assembly 100 further includes: a transmission rod 150, the first end of which is rotatably connected to the connecting rod assembly 118; a first elastic member 158, the first end of which is connected to the second end of the transmission rod 150, and the second end of which is connected to the hinge arm 110. In the folded position, the first elastic member 158 is in a first state, and in the unfolded position, the first elastic member 158 is in a second state; wherein, the deformation of the first elastic member 158 in the second state is greater than that in the first state.

[0176] In this embodiment, the pull-down door hinge assembly 100 also includes a transmission rod 150 and a first elastic element 158, which work together to achieve smooth folding and hovering unfolding of the door.

[0177] The first end of the transmission rod 150 is rotatably connected to the hinge arm 110, and the transmission rod 150 can rotate with the movement of the hinge arm 110.

[0178] The second end of the transmission rod 150 is connected to the first elastic element 158. When the transmission rod 150 rotates, it will drive the first elastic element 158 ​​to undergo corresponding deformation.

[0179] The first end of the first elastic element 158 ​​is connected to the second end of the transmission rod 150, and the second end is connected to the hinge arm 110.

[0180] The first elastic element 158 ​​has different deformations in two states: such as Figure 5 and Figure 6 As shown, in the folded position, the first elastic element 158 ​​is in the first state, where the deformation is relatively small. When in the folded position, the relative position between the transmission rod 150 and the hinge arm 110 allows the first elastic element 158 ​​to not bear too much tensile or compressive force, and the door 400 can be closed smoothly.

[0181] like Figure 9 and Figure 10 As shown, in the unfolded position, the first elastic element 158 ​​is in the second state, and its deformation is greater than that in the first state. This is because when the door 400 changes from the folded position to the unfolded position, the transmission rod 150 will rotate relative to the hinge arm 110 at a certain angle, which will cause the first elastic element 158 ​​to undergo greater deformation to provide necessary support and cushioning.

[0182] like Figure 7 and Figure 8As shown, when transitioning from the folded position to the unfolded position, the relative positions of the hinge arm 110 and the transmission rod 150 change, causing the first elastic element 158 ​​to gradually transition from the first state to the second state, with its deformation gradually increasing. During this process, the first elastic element 158 ​​provides the necessary resistance to ensure that the door 400 unfolds smoothly and slowly, avoiding sudden impacts or rebounds.

[0183] Meanwhile, since the first elastic element 158 ​​has a large torque in the unfolded position, when the door 400 attempts to move from the unfolded position to the folded position, the torque of the first elastic element 158 ​​will provide a reverse torque. When the first elastic element 158 ​​is extended, it provides a spring tension equal to the torque generated by the weight of the door 400, so as to enable the door 400 to be suspended at any angle when it is open.

[0184] Conversely, when the door 400 transitions from the unfolded position to the folded position, the first elastic element 158 ​​gradually returns from the second state to the first state, and its deformation gradually decreases. During this process, the first elastic element 158 ​​releases the previously stored energy, helping the door 400 fold more smoothly. During the closing process of the door 400, the first elastic element 158 ​​provides a spring tension greater than the torque generated by the weight of the door 400 when it retracts, thus realizing the automatic closing of the door 400.

[0185] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, optionally, the hinge arm 110 includes: a housing 112 connected to the link assembly 118; an adjustment assembly 104 connected to the housing 112, the second end of the first elastic member 158 being connected to the adjustment assembly 104, and the adjustment assembly 104 being used to adjust the position of the second end of the first elastic member 158 relative to the housing 112.

[0186] In this embodiment, for the specific structure of the hinge housing 102, the present invention provides that the hinge housing 102 includes a housing 112 and an adjustment assembly 104, which work together to adjust the position of the second end of the first elastic member 158.

[0187] As the main body of the hinge arm 110, the housing 112 is typically made of a robust and durable material to ensure it can withstand various forces and pressures during the operation of the sliding door. Specifically, the housing 112 is securely connected to other parts of the hinge by means such as screws or welding.

[0188] The adjustment component 104 is used to adjust the position of the second end of the first elastic element 158 ​​relative to the housing 112. This adjustment function allows the user or installer to adjust the deformation range of the first elastic element 158 ​​according to factors such as the weight of the door and the frequency of use, thereby achieving smoother and more stable door opening and closing operation 400.

[0189] The first end of the first elastic element 158 ​​is connected to the second end of the transmission rod 150, and the second end is connected to the housing 112 via the adjusting assembly 104. This connection method allows the first elastic element 158 ​​to change its tension and position according to the adjustment of the adjusting assembly 104.

[0190] When it is necessary to adjust the suspension position or tension of the pull-down door, the user or installer can change the position of the second end of the first elastic element 158 ​​relative to the housing 112 by adjusting component 104. This adjustment can be achieved by rotating the adjusting screw, sliding the slide rail, or operating the knob. After adjustment, the first elastic element 158 ​​will be in a new tension state, thereby changing the performance and stability of the pull-down door during folding and unfolding. Through proper adjustment, it can be ensured that the pull-down door can achieve smooth and stable operation under different usage scenarios and conditions, providing users with more flexible and convenient door opening and closing operations.

[0191] like Figure 4 As shown, in some embodiments of the present invention, optionally, the adjustment assembly 104 includes: a mounting base 106 connected to the housing 112; an adjustment rod 108 connected to the mounting base 106, the position of the adjustment rod 108 being adjustable relative to the mounting base 106, and the second end of the first elastic member 158 being connected to the adjustment rod 108.

[0192] In this embodiment, the adjustment component 104 is configured to include a mounting base 106 and an adjustment rod 108, wherein the mounting base 106 is connected to the housing 112 to connect the adjustment component to the housing 112.

[0193] The adjusting rod 108 is connected to the mounting base 106, and the position of the adjusting rod 108 can be adjusted relative to the mounting base 106. The second end of the first elastic element 158 ​​is connected to the adjusting rod 108. The position of the mounting base 106 relative to the housing 112 is fixed. By adjusting the position of the adjusting rod 108, the position of the second end of the first elastic element 158 ​​can be easily changed, thereby achieving the tension state of the first elastic element 158.

[0194] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, optionally, the pull-down door hinge assembly 100 further includes: a second pin 194 connected to the transmission rod 150, a first guide groove 114 provided on the hinge arm 110, the second pin 194 passing through the first guide groove 114, the first guide groove 114 extending along the length direction of the hinge arm 110, and the second pin 194 being used to slide along the first guide groove 114.

[0195] In this embodiment, the pull-down door hinge assembly 100 further includes a second pin 194, which is connected to the transmission rod 150 and can move synchronously with the transmission rod 150.

[0196] The hinge arm 110 is provided with a first guide groove 114, and a second pin 194 passes through the first guide groove 114. The first guide groove 114 extends along the length direction of the hinge arm 110. Figure 5 (In the direction indicated by the middle arrow C), the second pin 194 is used to slide along the first guide groove 114.

[0197] During the movement of the transmission rod 150 and the hinge arm 110, the first guide groove 114 limits the second pin 194, so that the transmission rod 150 and the hinge arm 110 can move accordingly, thereby realizing the opening and closing of the door 400.

[0198] like Figure 4 As shown, in some embodiments of the present invention, optionally, the first connecting rod 122 is provided with a sliding groove 124, the first end of the sliding groove 124 is away from the hinge arm 110, in the unfolded position, the end of the transmission rod 150 is located at the first end of the sliding groove 124, and in the folded position, the end of the transmission rod 150 is located at the second end of the sliding groove 124; wherein, in the folded position, from the second end of the sliding groove 124 to the first end of the sliding groove 124, the sliding groove 124 is inclined in a direction away from the hinge housing 102, and the first elastic member 158 is in a deformed state.

[0199] In this embodiment, a sliding groove 124 is provided on the hinge arm 110. In the folded position, from the first end of the sliding groove 124 to the second end of the sliding groove 124, the sliding groove 124 is inclined in a direction away from the first elastic member 158.

[0200] like Figure 6 As shown, in the folded position, the end of the transmission rod 150 is located at the first end of the sliding groove 124, and one end of the first elastic member 158 is fixed relative to the first end of the sliding groove 124, as shown. Figure 10 As shown, in the unfolded position, the end of the transmission rod 150 is located at the second end of the sliding groove 124. One end of the first elastic member 158 is fixed relative to the second end of the sliding groove 124. The position of one end of the first elastic member 158 changes. Therefore, even if the other end of the elastic member retracts, the first elastic member 158 does not fully recover. That is, in the folded position, the first elastic member 158 is in a deformed state. At this time, the elastic member will provide a closing force to the door 400, thereby making the door 400 close more tightly.

[0201] like Figure 4As shown, in some embodiments of the present invention, optionally, the transmission rod 150 includes: a transmission rod body 152, the first end of which is connected to a first elastic member 158; a third pin 154, which is connected to the second end of the transmission rod body 152 and passes through a sliding groove 124; and a second roller 156, which is sleeved on the third pin 154 and makes rolling contact with the inner wall of the sliding groove 124.

[0202] In this embodiment, the transmission rod 150 specifically includes a transmission rod body 152, a fourth pin 168, and a second roller 156. The first end of the transmission rod body 152 is connected to the first elastic member 158, thereby realizing the connection between the transmission rod body 152 as a whole and the first elastic member 158.

[0203] The fourth pin 168 is connected to the second end of the transmission rod body 152. The fourth pin 168 passes through the sliding groove 124, that is, it is set in the sliding groove 124 on the hinge arm 110.

[0204] During the movement of the hinge arm 110, the fourth pin 168 moves within the sliding groove 124, causing the transmission rod body 152 to displace and pull on the first elastic element 158, causing it to deform. Since the fourth pin 168 is located within the sliding groove 124 on the hinge arm 110, the first elastic element 158 ​​deforms in the direction of movement of the hinge arm 110. When the door 400 opens, the first elastic element 158 ​​provides an elastic force equal to the torque generated by the weight of the door 400 when it extends, allowing the door 400 to hover at any opening angle. During the closing process, the spring provides an elastic force greater than the torque generated by the weight of the door 400 when it retracts, enabling the door 400 to close automatically.

[0205] The second roller 156 is sleeved on the fourth pin 168. The second roller 156 makes rolling contact with the inner wall of the sliding groove 124. Through the second roller 156, the sliding motion of the fourth pin 168 is changed to rolling, which reduces friction and improves the smoothness of the movement of the fourth pin 168.

[0206] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the pull-down door hinge assembly 100 further includes: an elastic assist component 160 connected to the hinge arm 110, the end of the elastic assist component 160 abutting against the link assembly 118, and the elastic assist component 160 being used to push the link assembly 118 to provide a pushing force to the hinge housing 102 to rotate to the folding position.

[0207] In this embodiment, the pull-down door hinge assembly 100 further includes an elastic assist assembly 160. The elastic assist assembly 160 is connected to the hinge arm 110, and its end abuts against the link assembly 118. This assembly provides a pushing force to rotate toward the folded position to assist the closing action of the door 400 and to make the door 400 close more tightly.

[0208] When the user operates the door 400 to open it, the hinge housing 102 begins to rotate relative to the hinge arm 110. As the door 400 opens, the interaction between the linkage assembly 118 and the elastic assist assembly 160 changes. In the initial stage of opening, the elastic assist assembly 160 may be stretched or compressed to store energy.

[0209] When the user closes the door 400, the elastic assist component 160 begins to function. Due to the previously stored energy, the end of the elastic assist component 160 applies a pushing force to the linkage assembly 118, which assists the door 400 in rotating to the folding position. As the door 400 closes, the elastic assist component 160 gradually returns to its initial state, ready for the next opening and closing cycle.

[0210] The flexible assist component 160 provides a pushing force to the door 400 to rotate towards the folding position, assisting the closing action of the door 400 and making the closing process easier and smoother. Due to the assistance of the flexible assist component 160, the user does not need to expend excessive force to close the door 400, thus saving energy. The design of the flexible assist component 160 increases the stability of the door 400 during the closing process, reducing accidents caused by improper operation or external interference.

[0211] like Figure 4 As shown, in some embodiments of the present invention, the elastic assist component 160 includes: a fixed base 162 connected to the hinge arm 110; a push rod 164 slidably connected to the fixed base 162; a second elastic member 172, the first end of the second elastic member 172 being connected to the fixed base 162, the second end of the second elastic member 172 being connected to the push rod 164, and an arcuate surface 120 provided on the linkage assembly 118, the arcuate surface 120 being rotatable relative to the push rod 164. When the push rod 164 abuts against the arcuate surface 120, the second elastic member 172 is in a deformed state to provide a pushing force to the hinge housing 102 to rotate to the folding position. When the push rod 164 is separated from the arcuate surface 120, the second elastic member 172 is in its original state.

[0212] In this embodiment, the elastic assist component 160 is structured as follows: the elastic assist component 160 includes a fixed base 162, a push rod 164, and a second elastic element 172. The fixed base 162 is connected to the hinge arm 110, providing a mounting base for the push rod 164 and the second elastic element 172. The push rod 164 is slidably connected to the fixed base 162 and can slide up and down within the fixed base 162. The push rod 164 interacts with the arcuate surface 120 when it rotates, providing a pushing force for the door 400 to close. The first end of the second elastic element 172 is connected to the fixed base 162, and the second end is connected to the push rod 164. When the push rod 164 abuts against the arcuate surface 120 of the linkage assembly 118, the second elastic element 172 is compressed or stretched, and is in a deformed state, at which time it provides a pushing force to the hinge housing 102 to rotate to the folding position. When the push rod 164 separates from the arcuate surface 120, the second elastic element 172 returns to its original state, ready for the next deformation.

[0213] When the user operates the door 400 to open it, the hinge housing 102 begins to rotate relative to the hinge arm 110. The arcuate surface 120 on the linkage assembly 118 rotates as the door 400 opens, separating from the push rod 164. The second elastic element 172 returns to its original state, ready to provide assistance for closing the door 400.

[0214] When the user closes the door 400, the arcuate surface 120 on the linkage assembly 118 begins to approach the push rod 164. When the arcuate surface 120 contacts and abuts against the push rod 164, the second elastic element 172 begins to be compressed or stretched, entering a deformed state. The deformation of the second elastic element 172 generates a pushing force towards the hinge housing 102, assisting the door 400 in rotating to the folding position. As the door 400 continues to close, the push rod 164 gradually separates from the arcuate surface 120, and the second elastic element 172 gradually returns to its original state.

[0215] The flexible assist component 160 provides continuous pushing force during the closing process of the door 400, making the closing process easier and smoother.

[0216] like Figure 4 As shown, in some embodiments of the present invention, optionally, the push rod 164 includes: a rod body 166, slidably connected to the fixed seat 162; a fourth pin 168, passing through the end of the rod body 166; and a first roller 170, sleeved on the fourth pin 168, the first roller 170 being used for rolling contact with the arc-shaped surface 120.

[0217] In this embodiment, the push rod 164 includes a rod body 166, a fourth pin 168, and a first roller 170. The rod body 166 is slidably connected to a fixed base 162 and can slide up and down within the fixed base 162. The fourth pin 168 passes through the end of the rod body 166 and is used to mount and fix the first roller 170. The first roller 170 is sleeved on the fourth pin 168 and is used for rolling contact with the arcuate surface 120 of the connecting rod assembly 118. This design reduces friction, making the contact between the push rod 164 and the arcuate surface 120 smoother, and also extending the service life of the assembly.

[0218] When the user operates the door 400 to open it, the hinge housing 102 begins to rotate relative to the hinge arm 110. The arcuate surface 120 on the linkage assembly 118 rotates as the door 400 opens, separating from the first roller 170 of the push rod 164. The second elastic element 172 returns to its original state, ready to provide assistance for closing the door 400.

[0219] When the user closes the door 400, the arcuate surface 120 on the linkage assembly 118 begins to approach the first roller 170 of the push rod 164. When the arcuate surface 120 contacts and abuts against the first roller 170, the second elastic element 172 begins to be compressed or stretched, entering a deformed state. The deformation of the second elastic element 172 generates a pushing force towards the hinge housing 102, assisting the door 400 to rotate towards the folding position. As the door 400 continues to close, the first roller 170 gradually separates from the arcuate surface 120, and the second elastic element 172 gradually returns to its original state.

[0220] The first roller 170 on the push rod 164 makes rolling contact with the arc surface 120 of the connecting rod assembly 118, which significantly reduces friction and makes the opening and closing process of the door 400 smoother.

[0221] The design of the elastic assist component 160 provides a continuous and stable pushing force for the closing process of the door 400, making the closing process easier and less strenuous.

[0222] By reducing friction and direct force application, the design of the elastic assist component 160 helps extend the lifespan of the door 400 and the hinge assembly.

[0223] like Figure 4 As shown, in some embodiments of the present invention, the hinge housing 102 is provided with a second guide groove 116, the second guide groove 116 extends along the moving direction of the rod 166, and the fourth pin 168 is inserted into the second guide groove 116.

[0224] In this embodiment, a second guide groove 116 is provided on the hinge housing 102, and the second guide groove 116 is along the moving direction of the rod 166. Figure 7The fourth pin 168 extends (as indicated by arrow D) and passes through the end of the rod 166. The fourth pin 168 is inserted into the second guide groove 116. When the user closes the door 400, the arcuate surface 120 of the linkage assembly 118 approaches the first roller 170 of the push rod 164. When the arcuate surface 120 contacts and abuts against the first roller 170, the push rod 164 slides along the fixed seat 162, and the fourth pin 168 moves within the second guide groove 116. The second elastic element 172 begins to be compressed or stretched, entering a deformed state, generating a pushing force towards the hinge housing 102, assisting the door 400 to rotate to the folding position.

[0225] The second guide groove 116 ensures that the push rod 164 has a stable path during sliding, improving the stability and reliability of the entire assembly.

[0226] In some embodiments of the present invention, a cooking device is provided, including a housing 300 and a door 400, the door 400 being used to open or close the housing 300; a pull-down door hinge assembly 100, as in any of the above embodiments, is connected to the housing 300 and the door 400.

[0227] In this embodiment, the cooking device proposed by the present invention, because it includes the pull-down door hinge assembly 100 as in any of the above embodiments, has all the beneficial effects of the pull-down door hinge assembly 100 in any of the above embodiments.

[0228] The cooking equipment includes a housing 300 and a door 400. The door 400 is used to open or close the housing 300, thereby creating a cooking space within the cooking equipment, or allowing users to take food out of the housing 300.

[0229] Specifically, cooking equipment includes microwave ovens or ovens.

[0230] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0231] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0232] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pull-down door hinge assembly, characterized in that, A cooking appliance, the cooking appliance including a housing and a door, the door for opening or closing the housing, the pull-down door hinge assembly including: A hinge arm for connecting to the housing; A hinge housing for connecting to the door body; A linkage assembly is connected to the hinge arm and the hinge housing. The hinge housing rotates relative to the hinge arm between a folded position and an unfolded position via the linkage assembly. In the folded position, the distance between the hinge housing and the hinge arm is L1, and in the unfolded position, the distance between the hinge housing and the hinge arm is L2, where L2 > L1. The hinge housing also has a raised position, which is located between the folded position and the unfolded position. With the top or bottom surface of the hinge arm as the reference plane, the height of the hinge housing in the folded position is lower than the height in the raised position, and the height of the hinge housing in the unfolded position is lower than the height in the raised position.

2. The pull-down door hinge assembly according to claim 1, characterized in that, The linkage assembly includes: The first link, the first end of the first link being rotatably connected to the hinge arm; The second link has its first end rotatably connected to the second end of the first link, and its second end rotatably connected to the hinge housing; The third link, the first end of which is rotatably connected to the hinge arm, and the third link is rotatably connected to the second link; The fourth link has its first end rotatably connected to the second end of the third link, and its second end rotatably connected to the hinge housing.

3. The pull-down door hinge assembly according to claim 2, characterized in that, The linkage assembly also includes: The first pin is used to rotatably connect the first connecting rod and the second connecting rod. A pad is fitted onto the first pin, and the pad is located between the first connecting rod and the second connecting rod.

4. The pull-down door hinge assembly according to claim 2, characterized in that, The linkage assembly also includes: A fixing block is rotatably connected to the fourth link. The third link has a fixing groove. When the fixing block is in the initial position, the fixing block is separated from the fixing groove. When the fixing block is in the limiting position, at least a part of the fixing block is embedded in the fixing groove to restrict the rotation of the fourth link relative to the third link.

5. The pull-down door hinge assembly according to claim 4, characterized in that, The fixing block has a central hole, through which the fixing block avoids the first end of the fourth link, so that the fixing block can bypass the first end of the fourth link.

6. The pull-down door hinge assembly according to claim 4, characterized in that, The fourth link is provided with a receiving groove, and when the fixing block is in the initial position, a part of the fixing block is received in the receiving groove.

7. The pull-down door hinge assembly according to any one of claims 2 to 6, characterized in that, The pull-down door hinge assembly also includes: A limiting part is connected to the hinge housing, and a limiting groove is provided on the second connecting rod. In the folded position, the limiting part is inserted into the limiting groove, and the limiting groove is used to restrict the hinge housing from rotating toward the hinge arm.

8. The pull-down door hinge assembly according to claim 2, characterized in that, The pull-down door hinge assembly also includes: A button assembly is connected to the hinge housing. The button assembly is movable between a retracted position and an extended position. In the extended position, a portion of the button assembly extends out of the hinge housing to restrict the door from detaching from the hinge housing. In the retracted position, the button assembly extends into the hinge housing to release the restriction on the door.

9. The pull-down door hinge assembly according to any one of claims 2 to 6, characterized in that, The pull-down door hinge assembly also includes: A transmission rod, the first end of which is rotatably connected to the connecting rod assembly; A first elastic element, the first end of which is connected to the second end of the transmission rod, and the second end of which is connected to the hinge arm. In the folded position, the first elastic element is in a first state, and in the unfolded position, the first elastic element is in a second state. Wherein, the deformation of the first elastic element in the second state is greater than the deformation in the first state.

10. The pull-down door hinge assembly according to claim 9, characterized in that, The hinge arm includes: The housing is connected to the connecting rod assembly; An adjustment assembly is connected to the housing, and the second end of the first elastic element is connected to the adjustment assembly. The adjustment assembly is used to adjust the position of the second end of the first elastic element relative to the housing.

11. The pull-down door hinge assembly according to claim 10, characterized in that, The adjustment component includes: The mounting base is connected to the housing; An adjusting rod is connected to the mounting base, and the position of the adjusting rod can be adjusted relative to the mounting base. The second end of the first elastic member is connected to the adjusting rod.

12. The pull-down door hinge assembly according to claim 9, characterized in that, The pull-down door hinge assembly also includes: The second pin is connected to the transmission rod body. The hinge arm is provided with a first guide groove. The second pin passes through the first guide groove. The first guide groove extends along the length direction of the hinge arm. The second pin is used to slide along the first guide groove.

13. The pull-down door hinge assembly according to claim 9, characterized in that, The first connecting rod is provided with a sliding groove, the first end of the sliding groove is away from the hinge arm, in the unfolded position, the end of the transmission rod body is located at the first end of the sliding groove, and in the folded position, the end of the transmission rod body is located at the second end of the sliding groove; In the folded position, from the second end of the sliding groove to the first end of the sliding groove, the sliding groove is inclined away from the hinge housing, and the first elastic element is in a deformed state.

14. The pull-down door hinge assembly according to claim 13, characterized in that, The transmission rod includes: The transmission rod body, the first end of which is connected to the first elastic element; The third pin is connected to the second end of the transmission rod body, and the third pin passes through the sliding groove; The second roller is sleeved on the third pin, and the second roller makes rolling contact with the inner wall of the sliding groove.

15. The pull-down door hinge assembly according to any one of claims 1 to 6, characterized in that, The pull-down door hinge assembly also includes: An elastic assist component is connected to the hinge arm, and the end of the elastic assist component abuts against the link assembly. The elastic assist component is used to push the link assembly to provide a driving force to the hinge housing to rotate toward the folded position.

16. The pull-down door hinge assembly according to claim 15, characterized in that, The elastic assist component includes: A fixed base is connected to the hinge arm; The push rod is slidably connected to the fixed base; The second elastic element has a first end connected to the fixed base and a second end connected to the push rod. The linkage assembly has an arc-shaped surface that can rotate relative to the push rod. When the push rod abuts against the arc-shaped surface, the second elastic element is in a deformed state to provide a pushing force to the hinge housing to rotate to the folded position. When the push rod separates from the arc-shaped surface, the second elastic element is in its original state.

17. The pull-down door hinge assembly according to claim 16, characterized in that, The push rod includes: The rod is slidably connected to the fixed base; The fourth pin passes through the end of the rod. The first roller is sleeved on the fourth pin and is used to make rolling contact with the arc-shaped surface.

18. The pull-down door hinge assembly according to claim 17, characterized in that, The hinge arm is provided with a second guide groove, which extends along the moving direction of the rod body, and the fourth pin is inserted into the second guide groove.

19. A cooking device, characterized in that, include: A housing and a door, wherein the door is used to open or close the housing; The pull-down door hinge assembly as described in any one of claims 1 to 18 is connected to the housing and the door.

Images