Refrigerator hinge structure and embedded refrigerator
By optimizing the design of the linkage and elastic components of the embedded refrigerator hinge, the closing force and force transmission effect of the hinge are enhanced, solving the problem of high spring stiffness and low closing force in the existing technology, and realizing the application of elastic components with smaller stiffness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HISENSE(SHANDONG)REFRIGERATOR CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-19
AI Technical Summary
In existing embedded refrigerator hinge structures, the spring stiffness is high and the hinge closing force is low, resulting in limited spring material and insufficient closing force.
The design employs a linkage assembly and an elastic component. The linkage assembly includes a fixed linkage, a rotating linkage, multiple transmission arms, and an elastic element. By adjusting the position and angle relationship of the hinge point, the component force of the elastic element is made larger, thereby enhancing the closing force of the hinge. An elastic element with lower stiffness is also used.
It improves the closing force and force transmission effect of the hinge, reduces the stiffness requirement of the elastic element, and uses a smaller diameter elastic element while meeting the preset closing force requirement.
Smart Images
Figure CN224379615U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hinge connection technology, and more specifically, it relates to an embedded refrigerator hinge structure and an embedded refrigerator. Background Technology
[0002] Built-in refrigerators are home appliances that seamlessly integrate with kitchen spaces by being embedded inside cabinets. Their doors are connected to the cabinet doors via custom hinges, resulting in a clean and unified appearance. The hinges of built-in refrigerators are typically composed of multiple connecting rods, increasing the distance between the refrigerator door and the cabinet body when the door is opened, preventing interference with the cabinet door. Currently used built-in refrigerator hinge structures generally employ springs to press and lock the hinge. Therefore, the springs require significant force to lock the hinge and ensure its closing force. This results in relatively high spring stiffness, limiting the materials used for the springs, and also leading to a relatively low closing force of the hinge. Utility Model Content
[0003] The purpose of this utility model embodiment is to provide an embedded refrigerator hinge structure and an embedded refrigerator, so as to solve the technical problems of high spring stiffness and low hinge closing force in the prior art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an embedded refrigerator hinge structure, comprising:
[0005] A linkage assembly includes a fixed linkage, a rotating linkage, a first transmission arm, a second transmission arm, a third transmission arm, and a fourth transmission arm. The fixed linkage is used to fix the assembly to the refrigerator body, and the rotating linkage is used to fix the assembly to the refrigerator door. The two ends of the first transmission arm are respectively hinged to the first end of the fixed linkage and the first end of the second transmission arm. The second end of the second transmission arm is hinged to the second end of the rotating linkage. The two ends of the third transmission arm are respectively hinged to the second end of the fixed linkage and the middle portion of the second transmission arm. The two ends of the fourth transmission arm are respectively hinged to the middle portion of the third transmission arm and the first end of the rotating linkage. The line connecting the hinge points of the fixed linkage and the third transmission arm, and the hinge points of the first transmission arm and the second transmission arm, serves as a first reference line.
[0006] An elastic component includes an elastic element, one end of which is connected to the first transmission arm, the other end of which abuts against the second transmission arm, and the center line of the elastic element parallel to its extension and contraction direction is a second reference line.
[0007] The linkage assembly has a closed state and an extended state. When the linkage assembly is in the closed state, the hinge point of the second transmission arm and the third transmission arm is located between the first reference line and the second reference line.
[0008] Optionally, the fixing link has a first fixing side for fixing to the refrigerator body, and when the link assembly is in the closed state, the first reference line is set at an acute angle to the first fixing side.
[0009] Optionally, the ratio of the length of the fourth transmission arm to the length of the fixed link is in the range of 1.1 to 1.3; and / or, the ratio of the distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating link, to the length of the fixed link is in the range of 1.1 to 1.3.
[0010] Optionally, the fixed link, the first transmission arm, the link between the hinge points of the first and second transmission arms and the hinge points of the second and third transmission arms, and the third transmission arm form a first quadrilateral link mechanism, and the hinge point of the second and third transmission arms is the first pressure point; when the link assembly unfolds from the closed state to the unfolded state, the pressure angle of the first pressure point first increases, then decreases, and then increases again.
[0011] Optionally, the length ratio of the third transmission arm to the first transmission arm ranges from 0.85 to 0.87.
[0012] Optionally, the connecting rod between the hinge point of the second transmission arm and the hinge point of the third transmission arm and the hinge point of the second transmission arm and the rotating connecting rod, the connecting rod between the hinge point of the second transmission arm and the third transmission arm and the hinge point of the third transmission arm and the fourth transmission arm, the fourth transmission arm, and the rotating connecting rod constitute a second quadrilateral linkage mechanism, and the hinge point of the fourth transmission arm and the rotating connecting rod is a second pressure point; when the linkage assembly unfolds from the closed state to the unfolded state, the pressure angle of the second pressure point first decreases and then increases.
[0013] Optionally, the distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating connecting rod, is a first distance, and the ratio of the length of the fourth transmission arm to the first distance is in the range of 0.9 to 1.05.
[0014] Optionally, the distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating connecting rod, is a first distance; the distance between the hinge point of the third transmission arm and the fourth transmission arm, and the distance between the hinge point of the second transmission arm and the third transmission arm, is a second distance; the ratio of the sum of the first distance and the second distance to the sum of the length of the fourth transmission arm and the length of the fixed connecting rod ranges from 0.95 to 1.04.
[0015] Optionally, the fixed link has a first fixed side for fixing to the refrigerator body, and the rotating link has a second fixed side for fixing to the refrigerator door; when the link assembly is in the unfolded state, the included angle between the first fixed side and the second fixed side is 120 degrees to 125 degrees.
[0016] This utility model also proposes an embedded refrigerator, including a refrigerator body, a refrigerator door, and the aforementioned embedded refrigerator hinge structure, wherein the fixed connecting rod is fixed to the refrigerator body, and the rotating connecting rod is fixed to the refrigerator door.
[0017] The beneficial effects of the embedded refrigerator hinge structure and embedded refrigerator provided by this utility model are as follows: Compared with the prior art, the embedded refrigerator hinge structure of this utility model includes a connecting rod assembly and an elastic assembly. In the connecting rod assembly, the fixed connecting rod is fixed to the refrigerator body, and the rotating connecting rod is fixed to the refrigerator door. When the refrigerator door rotates relative to the refrigerator body, the connecting rod assembly rotates to open or close. The line connecting the hinge point of the fixed connecting rod and the third transmission arm, and the hinge point of the first transmission arm and the second transmission arm is the first reference line. The center line of the elastic element parallel to its extension and contraction direction is the second reference line. When the connecting rod assembly is in the closed state, the hinge point of the second transmission arm and the third transmission arm is located between the first reference line and the second reference line. The component force of the second transmission arm acting on the elastic element is larger, and the closing force of the hinge is also larger. The same elastic element has a better force transmission effect. Under the premise of meeting the preset hinge closing force, this utility model can use an elastic element with less stiffness compared with related technologies. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A structural diagram of the embedded refrigerator hinge structure provided in the embodiment of this utility model in the closed state (first transmission arm not shown);
[0020] Figure 2 A structural diagram of the embedded refrigerator hinge structure provided in the embodiment of this utility model in the second open state;
[0021] Figure 3 for Figure 2 Internal structure diagram of the hinge structure in the image;
[0022] Figure 4A structural diagram of the embedded refrigerator hinge structure provided in the embodiment of this utility model in the unfolded state;
[0023] Figure 5 The pressure angle variation curve of the first quadrilateral linkage mechanism provided in this embodiment of the utility model;
[0024] Figure 6 The pressure angle variation curve of the second quadrilateral linkage mechanism provided in this embodiment of the utility model;
[0025] Figure 7 A simplified structural diagram of the embedded refrigerator hinge structure in the closed state provided in this embodiment of the utility model;
[0026] Figure 8 A simplified structural diagram of the embedded refrigerator hinge structure provided in the first open state according to an embodiment of this utility model;
[0027] Figure 9 A simplified structural diagram of the embedded refrigerator hinge structure provided in the second open state according to an embodiment of this utility model.
[0028] The following are the labeling elements in the figure:
[0029] 10-Linkage assembly; 11-Fixed link; 111-First fixed side; 112-Reference side; 12-First transmission arm; 121-Guide hole; 13-Second transmission arm; 14-Third transmission arm; 15-Fourth transmission arm; 16-Rotating link; 161-Second fixed side; 20-Elastic component; 21-Elastic element; 22-Guide element; 23-Roller; 24-Cam. Detailed Implementation
[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0034] Built-in refrigerators are home appliances that seamlessly integrate with kitchen spaces by being embedded inside cabinets. Their doors are connected to the cabinet doors via custom hinges, resulting in a clean and unified appearance. The hinges of built-in refrigerators are typically composed of multiple connecting rods, increasing the distance between the refrigerator door and the cabinet body when the door is opened, preventing interference with the cabinet door. Currently used built-in refrigerator hinge structures generally employ springs to press and lock the hinge. Therefore, the springs require significant force to lock the hinge and ensure its closing force. This results in relatively high spring stiffness, limiting the materials used for the springs, and also leading to a relatively low closing force of the hinge.
[0035] To alleviate or solve the above technical problems, this utility model proposes an embedded refrigerator hinge structure and an embedded refrigerator. The embedded refrigerator hinge includes a linkage assembly 10 and an elastic component 20. The fixed linkage 11 and the rotating linkage 16 of the linkage assembly 10 are respectively fixed to the refrigerator body and the refrigerator door. When the linkage assembly 10 is in the closed state, by setting the hinge point D of the second transmission arm 13 and the third transmission arm 14 between the first reference line S1 and the second reference line S2, the angle between the length direction of the second transmission arm 13 and the second reference line S2 can be smaller. When the elastic component 21 remains unchanged, the component force generated by the elastic component 21 on the second transmission arm 13 is larger, the self-closing force of the linkage assembly 10 is stronger, and the force transmission effect is also better when the linkage assembly 10 rotates. Accordingly, under the premise of satisfying the self-closing force and the force transmission effect, the elastic component 21 with smaller stiffness and smaller wire diameter can be used.
[0036] The embedded refrigerator hinge structure provided in the embodiments of this utility model will now be described.
[0037] Please refer to the following: Figures 1 to 4 , Figures 7 to 9The embedded refrigerator hinge structure includes:
[0038] The linkage assembly 10 includes a fixed linkage 11, a rotating linkage 16, a first transmission arm 12, a second transmission arm 13, a third transmission arm 14, and a fourth transmission arm 15. The fixed linkage 11 is used to fix the refrigerator body, and the rotating linkage 16 is used to fix the refrigerator door. The two ends of the first transmission arm 12 are respectively hinged to the first end of the fixed linkage 11 (at point A) and the first end of the second transmission arm 13 (at point C). The second end of the second transmission arm 13 (at point Q) is hinged to the rotating linkage 16. The second end (at point Q), the two ends of the third transmission arm 14 are respectively hinged to the second end (at point B) of the fixed connecting rod 11 and the middle part (at point D) of the second transmission arm 13, the two ends of the fourth transmission arm 15 are respectively hinged to the middle part (at point E) of the third transmission arm 14 and the first end (at point P) of the rotating connecting rod 16, the line BC connecting the hinge point B of the fixed connecting rod 11 and the third transmission arm 14 and the hinge point C of the first transmission arm 12 and the second transmission arm 13 is the first reference line S1; and
[0039] The elastic component 20 includes an elastic element 21, one end of which is connected to the first transmission arm 12, and the other end of which abuts against the second transmission arm 13. The center line of the elastic element 21, which is parallel to its extension and contraction direction, is the second reference line S2.
[0040] The linkage assembly 10 has a closed state and an extended state. When the linkage assembly 10 is in the closed state, the hinge point of the second transmission arm 13 and the third transmission arm 14 is located between the first reference line S1 and the second reference line S2.
[0041] The linkage assembly 10 includes six links: a fixed link 11, a first transmission arm 12, a second transmission arm 13, a third transmission arm 14, a fourth transmission arm 15, and a rotating link 16. The fixed link 11 is fixed to the refrigerator body, and the rotating link 16 is fixed to the refrigerator door. When the refrigerator body and the refrigerator door rotate relative to each other, the linkage assembly 10 unfolds or closes. The angle of rotation of the refrigerator door relative to the refrigerator body can be simply referred to as the rotation angle of the linkage assembly 10, or the unfolding angle of the hinge structure. The hinge point between the fixed link 11 and the first transmission arm 12 is the first hinge point A; the hinge point between the fixed link 11 and the third transmission arm 14 is the second hinge point B; the hinge point between the first transmission arm 12 and the second transmission arm 13 is the third hinge point C; the hinge point between the second transmission arm 13 and the third transmission arm 14 is the fourth hinge point D; the hinge point between the third transmission arm 14 and the fourth transmission arm 15 is the fifth hinge point E; the hinge point between the fourth transmission arm 15 and the rotating link 16 is the sixth hinge point P; and the hinge point between the second transmission arm 13 and the rotating link 16 is the seventh hinge point Q. The hinge point between the fixed link 11 and the third transmission arm 14 is the second hinge point B, and the hinge point between the first transmission arm 12 and the second transmission arm 13 is the third hinge point C. The first reference line S1 is the line connecting BC.
[0042] The elastic component 20 includes an elastic element 21. When the connecting rod assembly 10 rotates open, the elastic element 21 first provides a certain rotational resistance to the connecting rod assembly 10. After the connecting rod assembly 10 is opened to a predetermined angle, the elastic element 21 provides rotational assistance to the connecting rod assembly 10, keeping the connecting rod assembly 10 in the open state. The second reference line S2 is parallel to the extension and retraction direction of the elastic element 21.
[0043] When the linkage assembly 10 is in the closed state, the rotating link 16 and the fixed link 11 approach each other until the linkage assembly 10 can no longer move; when the linkage assembly 10 is in the extended state, the rotating link 16 and the fixed link 11 move away from each other until the linkage assembly 10 can no longer rotate. The hinge point between the second transmission arm 13 and the third transmission arm 14 is the fourth hinge point D. When the linkage assembly 10 is in the closed state, the fourth hinge point D is located between the first reference line S1 and the second reference line S2. Figure 1This can also be understood as the fourth hinge point D being located above the first reference line S1. When the linkage assembly 10 begins to gradually unfold from its closed state, the elastic element 21 is in a compressed state. The first quadrilateral linkage mechanism ABCD needs to overcome the compressive force of the elastic element 21 to gradually unfold, and then drive the second quadrilateral linkage mechanism DEPQ to gradually unfold. When the linkage assembly 10 is in a closed state or has a tendency to unfold from its closed state, the connecting rod CD (part of the second transmission arm 13) always exerts a compressive force on the elastic element 21, giving the linkage assembly 10 a self-locking capability. The smaller the angle θ between the connecting rod CD and the second reference line S2, the greater the compressive force exerted by the connecting rod CD on the elastic element 21, and the stronger the self-locking capability of the linkage assembly 10.
[0044] In related technologies, the fourth hinge point D is located on the side of the first reference line S1 away from the second reference line S2, that is, the fourth hinge point D is located below the first reference line S1, and the angle between the connecting rod CD and the second reference line S2 is relatively large. In this application, the fourth hinge point D is located between the first reference line S1 and the second reference line S2, and the angle θ between the connecting rod CD and the second reference line S2 is smaller than that in related technologies. The closer the length direction of the connecting rod CD and the extension direction of the elastic element 21 are to each other, the greater the compressive force of the connecting rod CD on the elastic element 21, the stronger the closing force of the connecting rod assembly 10, and the better the force transmission effect. Correspondingly, the closing force of the hinge structure in the closed state is also stronger. Under the premise of satisfying the same preset hinge closing force, this application can use an elastic element 21 with smaller stiffness and smaller wire diameter than related technologies. That is to say, when the hinge structure in this application uses the same elastic element 21 as related technologies, it can provide a greater closing force in the closed state.
[0045] The embedded refrigerator hinge structure in the above embodiment includes a linkage assembly 10 and an elastic component 20. In the linkage assembly 10, the fixed linkage 11 is fixed to the refrigerator body, and the rotating linkage 16 is fixed to the refrigerator door. When the refrigerator door rotates relative to the refrigerator body, the linkage assembly 10 rotates to open or close. The line connecting the hinge point B of the fixed linkage 11 and the third transmission arm 14, and the hinge point C of the first transmission arm 12 and the second transmission arm 13 is the first reference line S1. The center line of the elastic element 21 parallel to its extension and contraction direction is the second reference line S2. When the linkage assembly 10 is in the closed state, the hinge point D of the second transmission arm 13 and the third transmission arm 14 is located between the first reference line S1 and the second reference line S2. The component force of the second transmission arm 13 acting on the elastic element 21 is larger, and the closing force of the hinge is also larger. The same elastic element 21 has a better force transmission effect. Under the premise of meeting the preset hinge closing force, this utility model can use an elastic element 21 with smaller stiffness compared with related technologies.
[0046] Please refer to some embodiments of this utility model. Figure 3 The elastic component 20 also includes a guide 22, a roller 23 and a cam 24. The elastic component 21 is mounted on the guide 22 and can extend and retract along the length of the guide 22. One end of the guide 22 is rotatably connected to the first transmission arm 12, and the other end of the guide 22 is connected to the self-rotating roller 23. The cam 24 is fixed to the second transmission arm 13, and the roller 23 can abut against the cam 24.
[0047] Optionally, please refer to Figure 1 The first transmission arm 12 has a guide hole 121, and one end of the guide member 22 with a roller 23 extends into the guide hole 121, so that the movement of the guide member 22 and the elastic member 21 during the rotation of the connecting rod assembly 10 can be more stable.
[0048] Please refer to some embodiments of this utility model. Figure 1 and Figure 7 The fixed link 11 has a first fixed side 111 for fixing to the refrigerator body. When the link assembly 10 is in the closed state, the first reference line S1 is set at an acute angle to the first fixed side 111. When the link assembly 10 is in the closed state, the extension and retraction direction of the elastic member 21 is not parallel to the first fixed side 111, but is set at an acute angle to the first fixed side 111. This can further reduce the included angle between the second reference line S2 and the link CD, thereby enhancing the clamping force of the link CD on the elastic member 21 and increasing the closing force of the hinge structure in the closed state.
[0049] It should be noted that the length of each link and transmission arm is the distance between the hinge points at both ends, and the length direction of each link and transmission arm is the direction of the line connecting the hinge points at both ends. Specifically: the length of the fixed link 11 is the length of AB, the length of the first transmission arm 12 is the length of BC, the length of the second transmission arm 13 is the length of CQ, the length of the third transmission arm 14 is the length of BD, the length of the fourth transmission arm 15 is the length of PE, and the length of the rotating link 16 is the length of PQ.
[0050] Please refer to some embodiments of this utility model. Figure 3 and Figure 9 The ratio of the length PE of the fourth transmission arm 15 to the length AB of the fixed connecting rod 11 ranges from 1.1 to 1.3. (Combined with...) Figure 9 The ratio of the length of PE to the length of AB ranges from 1.1 to 1.3. When the length of AB remains constant, the longer the PE is, the larger the angle of the linkage assembly 10 in the unfolded state, providing more space for users to retrieve items from the refrigerator and avoiding interference with the refrigerator door when retrieving items.
[0051] In some embodiments, the ratio of the length of PE to the length of AB is 1.15, 1.24, 1.28, etc., and the specific ratio is not limited here.
[0052] In some embodiments, the length of AB is 21 mm to 23 mm, and the length of PE is 23.1 mm to 29.9 mm. For example, the length of AB is 22 mm, and the length of PE is 27 mm, 28 mm, etc.
[0053] Please refer to some embodiments of this utility model. Figure 3 and Figure 9 The ratio of the distance between the hinge point D of the second transmission arm 13 and the third transmission arm 14, and the hinge point Q of the second transmission arm 13 and the rotating connecting rod 16, to the length AB of the fixed connecting rod 11 ranges from 1.1 to 1.3. Figure 9 The ratio of the length of DQ to the length of AB ranges from 1.1 to 1.3. When the length of AB remains constant, the longer the length of DQ, the larger the angle of the linkage assembly 10 in the unfolded state, providing more space for the user to retrieve items from the refrigerator and avoiding interference with the refrigerator door when retrieving items.
[0054] In some embodiments, the ratio of the length of DQ to the length of AB is 1.15, 1.24, 1.28, etc., and the specific ratio is not limited here.
[0055] In some embodiments, the length of AB is 21 mm to 23 mm, and the length of DQ is 23.1 mm to 29.9 mm. For example, the length of AB is 22 mm, and the length of DQ is 27 mm, 28 mm, etc.
[0056] Please refer to some embodiments of this utility model. Figure 3 and Figure 9 The ratio of the length PE of the fourth transmission arm 15 to the length AB of the fixed link 11 is in the range of 1.1 to 1.3, and the ratio of the distance between the hinge point D of the second transmission arm 13 and the third transmission arm 14 and the hinge point Q of the second transmission arm 13 and the rotating link 16 to the length of the fixed link 11 is in the range of 1.1 to 1.3.
[0057] Please refer to some embodiments of this utility model. Figure 5 , Figures 7 to 9The fixed link 11, the first transmission arm 12, the hinge point C between the first transmission arm 12 and the second transmission arm 13, and the link CD between the second transmission arm 13 and the third transmission arm 14 form a first quadrilateral linkage mechanism. The hinge point between the second transmission arm 13 and the third transmission arm 14 is the first pressure point D. When the linkage assembly 10 unfolds from the closed state to the unfolded state, the pressure angle of the first pressure point D first increases, then decreases, and then increases again. It can be understood that AB, AC, CD, and BD form the first quadrilateral linkage mechanism, that is, ABCD forms the first quadrilateral linkage mechanism. AB is equivalent to the frame, AC is equivalent to the driving link, and BD is equivalent to the driven link. The pressure angle of the first pressure point D is the angle between the direction of force at point D and the direction of absolute velocity.
[0058] When the linkage assembly 10 unfolds from the closed state to the unfolded state, the pressure angle of the first pressure point D first increases, then decreases, and then increases again. Thus, when the first quadrilateral linkage mechanism first begins to rotate, the pressure at the first pressure point D is relatively large, resulting in a large self-locking force. This prevents the hinge structure from springing open without external force or with a small external force, ensuring the refrigerator door remains tightly closed. As the first quadrilateral linkage mechanism rotates to a certain angle, the pressure angle of the first pressure point D gradually decreases, making the rotation of the first quadrilateral linkage mechanism smoother. When the first quadrilateral linkage mechanism rotates to near the unfolded state, the pressure angle of the first pressure point D increases again, making the first quadrilateral linkage mechanism less prone to springing back.
[0059] In some embodiments, please refer to Figure 5 When the linkage assembly 10 is in the closed state, the pressure angle of the first pressure point D is greater than 80 degrees; when the linkage assembly 10 is in the extended state, the pressure angle of the first pressure point D is greater than 35 degrees. In the closed state, the larger pressure angle of the first pressure point D indicates a stronger self-locking capability of the first quadrilateral linkage mechanism, requiring a larger external driving force to prevent the hinge structure from accidentally opening without external force. Furthermore, as the linkage assembly 10 gradually extends, the pressure angle of the first pressure point D gradually increases, further enhancing the self-locking capability of the first quadrilateral linkage mechanism. In the extended state, the pressure angle of the first pressure point D is greater than 35 degrees, making it easier to close under force.
[0060] Please refer to some embodiments of this utility model. Figures 7 to 9The length ratio of the third transmission arm 14 to the first transmission arm 12 ranges from 0.85 to 0.87, and the ratio of BD to AC also ranges from 0.85 to 0.87. In the first quadrilateral linkage ABCD, the smaller AC is and the larger BD is, the further point P is from the horizontal plane of the cabinet when the lengths of other links remain constant. This ensures that the hinge structure will not bump into the cabinet after being extended to its maximum angle (in the extended state). Therefore, the ratio of BD to AC is set to a range of 0.85 to 0.87.
[0061] Optionally, the ratio of BD to AC can be 0.85, 0.86, 0.87, etc.
[0062] Please refer to some embodiments of this utility model. Figures 6 to 9 The connecting rod DQ between the hinge point D of the second transmission arm 13 and the third transmission arm 14 and the hinge point Q of the second transmission arm 13 and the rotating connecting rod 16, the connecting rod DE between the hinge point D of the second transmission arm 13 and the third transmission arm 14 and the hinge point E of the third transmission arm 14 and the fourth transmission arm 15, and the fourth transmission arm 15 and the rotating connecting rod 16 form a second quadrilateral linkage mechanism. The hinge point of the fourth transmission arm 15 and the rotating connecting rod 16 is the second pressure point P. When the linkage assembly 10 unfolds from the closed state to the unfolded state, the pressure angle of the second pressure point P first decreases and then increases. It can be understood that DQ, DE, EP, and PQ form a second quadrilateral linkage mechanism, that is, DEPQ forms a second quadrilateral linkage mechanism. DE is equivalent to the frame, DQ is equivalent to the driving rod, and EP is equivalent to the driven rod. The pressure angle of the second pressure point P is the angle between the direction of force at point P and the direction of absolute velocity.
[0063] When the linkage assembly 10 unfolds from the closed state to the unfolded state, the pressure angle of the second pressure point P first decreases and then increases. As a result, the pressure on the second quadrilateral linkage mechanism decreases when it first starts to rotate, and the rotation of the second quadrilateral linkage mechanism gradually becomes smoother. When the second quadrilateral linkage mechanism rotates to near the unfolded state, the pressure angle of the second pressure point P gradually increases, and the second quadrilateral linkage mechanism is less likely to spring back.
[0064] In some embodiments, when the linkage assembly 10 is in the closed state, the pressure angle of the second pressure point P is greater than 60 degrees; when the linkage assembly 10 is in the extended state, the pressure angle of the second pressure point is less than 75 degrees; and the pressure angle of the second pressure point P is always less than 90 degrees. When the linkage assembly 10 is in the closed state, the pressure angle of the second pressure point P is relatively large, resulting in a strong self-locking capability of the second quadrilateral linkage mechanism. This requires a large external driving force to drive the second quadrilateral linkage mechanism to prevent the hinge structure from accidentally springing open without external force. When the linkage assembly 10 is in the extended state, the pressure angle of the second pressure point P is greater than 75 degrees, making it less prone to springing back in the extended state.
[0065] In some embodiments of this utility model, the distance between the hinge point D of the second transmission arm 13 and the third transmission arm 14, and the hinge point Q of the second transmission arm 13 and the rotating connecting rod 16 is the first distance. The ratio of the length EP of the fourth transmission arm 15 to the first distance ranges from 0.9 to 1.05. The first distance is the length of DQ, the length of the fourth transmission arm 15 is the length of EP, and the ratio of EP to DQ is 0.9 to 1.05. In the second quadrilateral linkage mechanism DEPQ, when the lengths of other links remain unchanged, the smaller EP is, the larger DQ is, and the farther point P is from the cabinet (away from the first fixed side 111). At the same time, when PQ moves to be perpendicular to the first fixed side 111, point P needs to be further to the left to allow for a greater distance and not to obstruct the refrigerator access opening. However, when the linkage assembly 10 is in the unfolded state, the vertical distance between point P and the first fixed side 111, and the distance between point P and the reference side 112 (the left side of the fixed connecting rod 11, which is perpendicular to the first fixed side 111) have the opposite relationship. Therefore, the ratio of EP to DQ is set to 0.9 to 1.05.
[0066] Optionally, the ratio of EP to DQ can be 0.9, 1, 1.02, 1.05, etc., and the specific value is not limited here.
[0067] Please refer to some embodiments of this utility model. Figures 7 to 9 The distance between the hinge point D of the second transmission arm 13 and the third transmission arm 14, and the hinge point Q of the second transmission arm 13 and the rotating connecting rod 16 is the first distance; the distance between the hinge point E of the third transmission arm 14 and the fourth transmission arm 15, and the distance between the hinge point D of the second transmission arm 13 and the third transmission arm 14 is the second distance; the ratio of the sum of the first distance DQ and the second distance DE to the sum of the length EP of the fourth transmission arm 15 and the length AB of the fixed connecting rod 11 ranges from 0.95 to 1.04. Understandably, the first distance is the length of DQ, the second distance is the length of DE, the length of the fourth transmission arm 15 is EP, and the length of the fixed connecting rod 11 is PQ. The ratio of (DE+DQ) to (EP+PQ) is from 0.95 to 1.04. When the sum of the lengths ED and DQ is much greater than the sum of the lengths EP and PQ, the tendency for the parallelogram EDPQ to transform into a triangle with EDQ as its vertex is more pronounced, resulting in a very small opening angle; conversely, the opening angle is larger. Therefore, let the ratio of (DE+DQ) / (EP+PQ) be k, and design that 0.95≤k≤1.04.
[0068] In some embodiments, k is 0.95, 0.98, 1, 1.04, etc., and its specific value is not limited here.
[0069] In some embodiments of this utility model, the fixed connecting rod 11 has a first fixed side 111 for fixing to the refrigerator body, and the rotating connecting rod 16 has a second fixed side 161 for fixing to the refrigerator door. When the connecting rod assembly 10 is in the unfolded state, the included angle between the first fixed side 111 and the second fixed side 161 is 120 to 125 degrees. The angle of the connecting rod assembly 10 in the unfolded state is relatively large, meaning that when the hinge structure is applied to the refrigerator, the opening angle is larger, making it less likely to affect the retrieval of items from the refrigerator. Simultaneously, the fixed connecting rod 11 also has a reference side 112 perpendicular to the first fixed side 111. When the connecting rod assembly 10 is in the unfolded state, the second fixed side 161 can extend beyond the plane of the reference side 112 to the left side of the reference side 112 (in conjunction with...). Figure 9 When the linkage assembly 10 is deployed, its movement trend is that the second fixed side 161 moves from right to left. That is to say, in this embodiment, the second fixed side 161 can be further away from the opening of the refrigerator body, making it less likely to affect the retrieval of items.
[0070] In some embodiments, when the linkage assembly 10 is in the deployed state, the included angle between the first fixed side 111 and the second fixed side 161 is 120 degrees, 121 degrees, 123 degrees, 125 degrees, etc.
[0071] This utility model also provides an embedded refrigerator, which includes a refrigerator body, a refrigerator door, and the embedded refrigerator hinge structure of any of the above embodiments. A fixing link 11 is fixed to the refrigerator body, and a rotating link 16 is fixed to the refrigerator door. That is, the refrigerator body is the refrigerator body described above, and the refrigerator door is the refrigerator door described above. When the refrigerator door rotates open relative to the refrigerator body, the hinge structure gradually rotates from a closed state to an open state, causing the refrigerator door to translate relative to the refrigerator body. Figure 1 (Vertical movement) to keep the refrigerator door away from the refrigerator cabinet, so as to prevent the refrigerator door from touching the cabinet.
[0072] The embedded refrigerator provided by this utility model adopts the above-mentioned embedded refrigerator hinge structure. The embedded refrigerator hinge structure includes a connecting rod assembly 10 and an elastic component 20. In the connecting rod assembly 10, the fixed connecting rod 11 is fixed to the refrigerator body, and the rotating connecting rod 16 is fixed to the refrigerator door. When the refrigerator door rotates relative to the refrigerator body, the connecting rod assembly 10 rotates to open or close. The line connecting the hinge point B of the fixed connecting rod 11 and the third transmission arm 14, and the hinge point C of the first transmission arm 12 and the second transmission arm 13 is the first reference line S1. The center line of the elastic element 21 parallel to its extension and contraction direction is the second reference line S2. When the connecting rod assembly 10 is in the closed state, the hinge point D of the second transmission arm 13 and the third transmission arm 14 is located between the first reference line S1 and the second reference line S2. The component force of the second transmission arm 13 acting on the elastic element 21 is larger, and the closing force of the hinge is also larger. The same elastic element 21 has a better force transmission effect. Under the premise of meeting the preset hinge closing force, this utility model can use an elastic element 21 with smaller stiffness compared with related technologies.
[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An embedded refrigerator hinge structure, characterized in that, include: A linkage assembly includes a fixed linkage, a rotating linkage, a first transmission arm, a second transmission arm, a third transmission arm, and a fourth transmission arm. The fixed linkage is used to fix the refrigerator body, and the rotating linkage is used to fix the refrigerator door. The two ends of the first transmission arm are respectively hinged to the first end of the fixed linkage and the first end of the second transmission arm. The second end of the second transmission arm is hinged to the second end of the rotating linkage. The two ends of the third transmission arm are respectively hinged to the second end of the fixed linkage and the middle part of the second transmission arm. The two ends of the fourth transmission arm are respectively hinged to the middle part of the third transmission arm and the first end of the rotating linkage. The line connecting the hinge point of the fixed linkage and the third transmission arm, and the hinge point of the first transmission arm and the second transmission arm, is a first reference line. as well as An elastic component includes an elastic element, one end of which is connected to the first transmission arm, the other end of which abuts against the second transmission arm, and the center line of the elastic element parallel to its extension and contraction direction is a second reference line. The linkage assembly has a closed state and an extended state. When the linkage assembly is in the closed state, the hinge point of the second transmission arm and the third transmission arm is located between the first reference line and the second reference line.
2. The embedded refrigerator hinge structure as described in claim 1, characterized in that, The fixing link has a first fixing side for fixing to the refrigerator body, and when the link assembly is in the closed state, the first reference line is set at an acute angle to the first fixing side.
3. The embedded refrigerator hinge structure as described in claim 1, characterized in that, The ratio of the length of the fourth transmission arm to the length of the fixed link is in the range of 1.1 to 1.3; and / or the ratio of the distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating link, to the length of the fixed link is in the range of 1.1 to 1.
3.
4. The embedded refrigerator hinge structure as described in claim 1, characterized in that, The fixed connecting rod, the first transmission arm, the connecting rod between the hinge points of the first and second transmission arms and the hinge points of the second and third transmission arms, and the third transmission arm form a first quadrilateral linkage mechanism. The hinge points of the second and third transmission arms are the first pressure points. When the linkage assembly unfolds from the closed state to the unfolded state, the pressure angle of the first pressure point first increases, then decreases, and then increases again.
5. The embedded refrigerator hinge structure as described in claim 4, characterized in that, The length ratio of the third transmission arm to the first transmission arm ranges from 0.85 to 0.
87.
6. The embedded refrigerator hinge structure as described in claim 1, characterized in that, The connecting rod between the hinge point of the second transmission arm and the third transmission arm and the hinge point of the second transmission arm and the rotating connecting rod, the connecting rod between the hinge point of the second transmission arm and the third transmission arm and the hinge point of the third transmission arm and the fourth transmission arm, the fourth transmission arm, and the rotating connecting rod constitute a second quadrilateral linkage mechanism. The hinge point of the fourth transmission arm and the rotating connecting rod is the second pressure point. When the linkage assembly unfolds from the closed state to the unfolded state, the pressure angle of the second pressure point first decreases and then increases.
7. The embedded refrigerator hinge structure as described in claim 6, characterized in that, The distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating connecting rod, is the first distance. The ratio of the length of the fourth transmission arm to the first distance is in the range of 0.9 to 1.
05.
8. The embedded refrigerator hinge structure as described in any one of claims 1-7, characterized in that, The distance between the hinge point of the second transmission arm and the third transmission arm, and the distance between the hinge point of the second transmission arm and the rotating connecting rod, is the first distance; the distance between the hinge point of the third transmission arm and the fourth transmission arm, and the distance between the hinge point of the second transmission arm and the third transmission arm, is the second distance; the ratio of the sum of the first distance and the second distance to the sum of the length of the fourth transmission arm and the length of the fixed connecting rod ranges from 0.95 to 1.
04.
9. The embedded refrigerator hinge structure as described in any one of claims 1-7, characterized in that, The fixed link has a first fixed side for fixing to the refrigerator body, and the rotating link has a second fixed side for fixing to the refrigerator door; when the link assembly is in the unfolded state, the included angle between the first fixed side and the second fixed side is 120 degrees to 125 degrees.
10. An embedded refrigerator, characterized in that: The refrigerator includes a refrigerator body, a refrigerator door, and an embedded refrigerator hinge structure as described in any one of claims 1-9, wherein the fixed connecting rod is fixed to the refrigerator body, and the rotating connecting rod is fixed to the refrigerator door.