Fixed hinge seat, hinge and opening and closing device

Abstract

The application discloses a fixed hinge seat, a hinge and an opening and closing device. The fixed hinge seat comprises a first part and a second part. The first part comprises a first body and a first hinge part. The second part comprises a second body and a second hinge part. The first part and the second part are assembled at two ends of a rotating hinge seat. After the first part and the second part are assembled, the first body and the second body integrally form a first mounting part, and the first hinge part and the second hinge part are arranged at intervals. The first part and the second part of the fixed hinge seat are separately arranged at the two ends of the rotating hinge seat, so that the accessories for assembling the fixed hinge seat are reduced, the assembly is facilitated, and the assembly complexity is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of hinges, and more particularly to a fixed hinge seat, a hinge, and an opening and closing device. Background Technology

[0002] Door hinges, as a core connecting component, are mainly installed between the door and the main body of the equipment. Through their structure, they enable the door to open, close, and position at an angle, and are widely used in refrigerators, freezers, and other products that require opening and closing. For example, the dedicated door hinges configured on freezer doors directly affect the freezer's sealing performance and ease of opening and closing.

[0003] In the prior art, Chinese patents with authorization announcement numbers CN222066497U and CN210483350U disclose door hinges, which include a rotating plate and a fixed plate. During assembly, the rotating plate is rotatably mounted within a pre-set groove in the fixed plate, and both ends are rotatably connected to the fixed plate via screws to ensure the stability of the door's opening and closing. However, to achieve precise positioning and stable connection between the rotating and fixed plates, this type of door hinge requires additional components, increasing material management costs and extending the assembly process, resulting in low assembly efficiency and high complexity. Utility Model Content

[0004] This disclosure provides a fixed hinge seat, a hinge, a method for assembling the hinge, and an opening and closing device.

[0005] The first point of this invention is that the first and second parts of the fixed hinge seat are separately assembled at both ends of the rotating hinge seat.

[0006] 1. The fixed hinge seat is divided into a first part and a second part, which are separately assembled at both ends of the rotary hinge seat. This application provides a fixed hinge seat, including a first part and a second part. The first part includes a first body and a first hinge portion; the second part includes a second body and a second hinge portion. The first part and the second part are assembled at both ends of the rotary hinge seat. After assembly, the first body and the second body form a first mounting part, and the first hinge portion and the second hinge portion are spaced apart and opposite to each other. The separate assembly of the first part and the second part at both ends of the rotary hinge seat reduces the number of accessories required for assembling the fixed hinge seat, facilitates installation and assembly, and reduces assembly complexity.

[0007] 2. The first and second bodies are detachably connected for easy assembly.

[0008] 3. The first body and the second body are connected by a first overlapping part and a second overlapping part, which facilitates assembly and reduces assembly complexity.

[0009] 4. The first and second overlapping parts overlap and are fixed by buckles and snap-fit ​​holes for easy assembly.

[0010] 5. The first part and the second part are set separately, and one end of the first body and the second body are set close to each other. The first body and the second body are combined to form a mounting hole for fixing.

[0011] The second point of this invention is: a hinge.

[0012] 6. The hinge includes a first hinge seat and a second hinge seat. The first hinge seat is a fixed hinge seat according to any of the first aspects of this disclosure. The second hinge seat includes a third hinge portion and a second mounting portion. The third hinge portion is provided with a receiving cavity, and the third hinge portion is rotatably mounted between the first hinge portion and the second hinge portion. The first hinge seat can be assembled and fixed at both ends of the second hinge seat, reducing the number of accessories in the hinge assembly, facilitating installation and assembly, and reducing assembly complexity.

[0013] 7. The first and second positioning parts are provided with initial angle positioning holes. In the assisted hinge, less force is needed to open the freezer door when it is opened. The connecting rod and the first and second positioning parts can limit the hinge to stay in the closed state.

[0014] The third point of this invention is: opening and closing device.

[0015] 8. Opening and closing device, including: a housing and a door. The door is rotatably mounted on the housing via a fixed hinge seat or a hinge of any of the present disclosures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a hinge explosion according to an embodiment of the present disclosure. Figure 1 ; Figure 2 This is a schematic diagram of the first part of the fixed hinge seat according to an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the second part of the fixed hinge seat according to an embodiment of the present disclosure; Figure 4 This is a front view of the hinge assembly according to an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the rear side of the hinge assembly according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the second hinge seat according to an embodiment of the present disclosure. Figure 1 ; Figure 7 This is a schematic diagram of the second hinge seat according to an embodiment of the present disclosure. Figure 2 ; Figure 8 This is a schematic diagram of the hinge rotation mechanism according to an embodiment of the present disclosure. Figure 1 ; Figure 9This is a schematic diagram of the hinge rotation mechanism according to an embodiment of the present disclosure. Figure 2 .

[0017] Meaning of the labels in the attached diagram: 10. Fixed hinge seat; 11. First part; 12. Second part; 13. First mounting part; 14. Through groove; 15. Inner helical arc surface; 16. Shaft. 111. First body; 112. First hinge; 113. First positioning part; 1111. First side part; 1112. First overlapping part; 1113. Buckle; 121. Second body; 122. Second hinge; 123. Second positioning part; 1211. Second side part; 1212. Second overlapping part; 1213. Locking hole; 20. Second hinge seat; 21. Third hinge part; 22. Second mounting part; 23. Receiving cavity; 231. Protruding strip; 24. Protruding rib; 30. Rotating mechanism; 31. First helical body; 32. Spring assembly; 33. Second helical body; 34. Connecting shaft; 35. Groove; 311. First outer helical arc surface; 331. Second outer helical arc surface; 40. Connecting rod. Detailed Implementation

[0018] The contents of this disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the existing technology, the fixed plate is an integral structure, which requires a complex closed structure to be set on the side of the fixed plate for assembly. The number of parts is large, which increases the assembly complexity.

[0020] To address the problem of complex door hinge installation, this disclosure provides a fixed hinge base. The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this disclosure.

[0021] Reference Figures 1-3 The fixed hinge seat 10 includes a first part 11 and a second part 12. The fixed hinge seat 10 is used to assemble with a rotating hinge seat to form a hinge. The first part 11 and the second part 12 are assembled at both ends of the rotating hinge seat.

[0022] Reference Figures 1-3 The first part 11 includes a first body 111 and a first hinge portion 112. The second part 12 includes a second body 121 and a second hinge portion 122. After the first part 11 and the second part 12 are assembled, the first body 111 and the second body 121 are integrally combined to form a first mounting part 13, and the first hinge portion 112 and the second hinge portion 122 are arranged at intervals relative to each other.

[0023] The first hinge portion 112 is integrally formed with the first body 111, and the first hinge portion 112 is located on one side of the first body 111. The second hinge portion 122 is integrally formed with the second body 121, and the second hinge portion 122 is located on one side of the second body 121. The first hinge portion 112 protrudes from one upper end of the first body 111, and the second hinge portion 122 protrudes from one upper end of the second body 121. The first hinge portion 112 and the second hinge portion 122 are generally circular in shape.

[0024] The fixed hinge seat 10 includes a first mounting part 13 and a hinge part. The hinge part includes a first hinge part 112 and a second hinge part 122. The first hinge part 112 and the second hinge part 122 are arranged at a distance from each other. A receiving groove is formed between the first hinge part 112 and the second hinge part 122 for assembling the hinge part of the rotating fixed hinge seat.

[0025] The first and second parts of the fixed hinge seat 10 can be fixedly connected at one end of the first body 111 and the second body 121, or the first body 111 and the second body 121 can be not connected at one end and are arranged adjacent to each other.

[0026] Chinese patents CN222066497U and CN210483350U disclose door hinges. As shown in the patent drawings, the fixed plate of the prior art door hinge is set as a whole. An end cap or other closed structure needs to be set on the side of the fixed plate for assembly, which increases the number of parts and the complexity of assembly.

[0027] The fixed hinge base 10 disclosed herein is divided into a first part 11 and a second part 12. After the first part 11 and the second part 12 are assembled at both ends of the rotating hinge base, the first body 111 and the second body 112 are integrally combined to form the first mounting part 13, and the first hinge part 112 and the second hinge part 122 are arranged at intervals opposite to each other. When assembling the fixed hinge base and the rotating base, there is no need to set up a complex closed structure, which reduces the number of parts, reduces the difficulty of assembly, and facilitates hinge assembly.

[0028] Reference Figures 1-3 The first hinge portion 112 and / or the second hinge portion 122 are provided with through grooves 14, and at least one through groove 14 is provided with an inner spiral arc surface 15.

[0029] Reference Figures 1-3 A through groove 14 is provided on the opposite side of the first hinge portion 112 and the second hinge portion 122, and an inner helical arc surface 15 is provided in each through groove 14. After the first hinge portion 112, the second hinge portion 122 and the rotating seat are assembled, the inner helical arc surface 15 can be connected to the outer helical arc surface of the piston or the helical body. The helical directions of the inner helical arc surface of the through groove of the first hinge portion 112 and the inner helical arc surface of the through groove of the second hinge portion 122 are opposite.

[0030] The first hinge portion 112 and the second hinge portion 122 are symmetrical double-helix structures. In the prior art, door hinges use a single-helix structure, where the spring force is too great, causing the helix structure to be damaged, resulting in poor opening and closing performance, and the stability of the single-sided helix is ​​also poor. This disclosure provides an inner helical arc surface 15 within the through groove 14 on opposite sides of the first hinge portion 112 and the second hinge portion 122. This allows for separate insertion and assembly of the double helix with the fixed hinge seat, facilitating installation. Furthermore, the double helix design reduces the pressure of the spring on the helix structure after hinge assembly, thus enabling the installation of larger opening and closing devices. For example, the fixed hinge seat of this embodiment can accommodate larger refrigerators.

[0031] like Figure 1 As shown, the first hinge portion 112 and the second hinge portion 122 are also provided with insertion holes.

[0032] Reference Figures 1-3 A shaft 16 is also provided on the opposite side of the first hinge portion 112 and the second hinge portion 122. The shaft 16 is coaxially arranged with the first hinge portion 112 and the second hinge portion 122, and the shaft 16 is provided with a insertion hole.

[0033] The shaft 16 protrudes from the groove and may include a first shaft segment and a second shaft segment. The diameter of the first shaft segment is larger than that of the second shaft segment. One end of the first shaft segment is connected to the inner helical arc surface in the through groove, and the other end of the first shaft segment is connected to the second shaft segment. When assembling the fixed hinge seat and the rotating seat, the connecting shaft is inserted into the assembly through the insertion hole, reducing the assembly complexity.

[0034] Reference Figures 1-3 A first positioning part 113 protrudes from the first hinge part 112, and a second positioning part 123 protrudes from the second hinge part 122. The first positioning part 113 and the second positioning part 123 are arranged opposite to each other.

[0035] Both the first positioning part 113 and the second positioning part 123 are provided with positioning holes, and the first positioning part 113 and the second positioning part 123 are generally located on the end side of the hinge part of the fixed hinge seat. The positions of the first positioning part 113 and the second positioning part 123 correspond, that is, the connecting rod can be inserted from the positioning hole of the first positioning part to the positioning hole of the second positioning part.

[0036] The positioning hole in this embodiment is an initial angle positioning hole. In the assisted hinge, it is necessary to provide upward assistance to the door body even when the door is closed, so as to reduce the opening force and enable the customer to open the door with less force when opening and closing the door body. At this time, the hinge cannot stay in the open state on its own, and it is necessary to use a connecting rod or a pin or other structure for limiting.

[0037] like Figure 1As shown, the first body 111 and the second body 121 are detachably connected.

[0038] Reference Figures 1-3 The first body 111 includes a first side portion 1111 and a first overlapping portion 1112, the first hinge portion 112 and the first side portion 1111 are connected, the second body 121 includes a second side portion 1211 and a second overlapping portion 1212, the second hinge portion 122 and the second side portion 1211 are connected, and the first overlapping portion 1112 and the second overlapping portion 1212 are plugged into each other.

[0039] like Figure 2 As shown, the first side portion 1111 is connected to the first hinge portion, and the inner side of the first side portion 1111 (i.e. the side where the inner spiral arc surface 15 is provided) is provided with a first overlapping portion 1112, the thickness of the first overlapping portion 1112 is less than the thickness of the first side portion 1111.

[0040] like Figure 3 As shown, the second side portion 1211 is connected to the second hinge portion, and the inner side of the second side portion 1211 (i.e. the side where the inner spiral arc surface 15 is provided) is provided with a second overlapping portion 1212, the thickness of the second overlapping portion 1212 is less than the thickness of the second side portion 1211.

[0041] Reference Figures 1-3 The first overlapping part 1112 is provided with a buckle 1113, and the second overlapping part 1212 is provided with a locking hole 1213. The first overlapping part 1112 and the second overlapping part 1212 overlap and are fixed by the buckle 1113 and the locking hole 1213.

[0042] The first overlapping part has a locking hole, and the second overlapping part has a locking buckle. The first overlapping part and the second overlapping part are fixed together by the locking buckle and the locking hole. The first overlapping part and the second overlapping part can also be fixed together by fasteners or other methods.

[0043] The end where the first overlapping portion 1112 connects to the second overlapping portion is divided into a first sub-part and a second sub-part. The first sub-part protrudes relative to the second sub-part, and a step is formed between the first sub-part and the second sub-part. Buckles 1113 are respectively provided on the ends of the first sub-part and the second sub-part.

[0044] The second overlapping part 1212 is provided with a reinforcing rib, and the second overlapping part 1212 is also provided with a locking hole adapted to the buckle 1113. By setting buckles and locking holes respectively in the first sub-part and the second sub-part to connect, the stability of the connection is enhanced.

[0045] Reference Figures 1-3The thickness of the first overlapping portion 1112 is smaller than the thickness of the second overlapping portion 1212. After assembly, the first overlapping portion 1112 and the second overlapping portion 1212 are flush with the first side portion 1111 or the second side portion 1211. That is, after assembly, the height of the first overlapping portion and the second overlapping portion is exactly flush with the first side portion and the second side portion, so that the first overlapping portion and the second overlapping portion will not protrude, ensuring the aesthetics of the hinge.

[0046] Reference Figures 1-3 The first overlapping portion 1112 includes a first connecting portion and a first flat portion. The first connecting portion is located between the first side portion and the first flat portion. A step is formed between the first connecting portion and the first flat portion. The thickness of the first connecting portion gradually decreases from the first side portion to the first flat portion. The second overlapping portion includes a second flat portion and a second connecting portion adapted to the first connecting portion.

[0047] The thickness of the first connecting portion gradually decreases from the first side portion to the first flat portion, that is, the height of the first connecting portion gradually decreases from one end of the first side portion to the first flat portion, and the first connecting portion forms an arc-shaped surface. It should be noted that the first flat portion here can be understood as being roughly planar, and it may have a certain degree of inclination.

[0048] like Figures 1-3 As shown, a first connecting part and a second connecting part are provided between the first overlapping part 1112 and the second overlapping part 1212. The first connecting part and the second connecting part are arc-shaped surfaces, which can further enhance the reliability of the connection between the first part and the second part.

[0049] Single-helix hinges in related technologies suffer from problems such as high spring force, potential damage to the helical structure, and poor stability. Double-helix hinges, on the other hand, present the challenge of complex assembly.

[0050] One end of the first body 111 and one end of the second body 121 are positioned close to each other and flush with each other. After being installed at both ends of the rotating hinge seat, the ends of the first body 111 and the second body 121 are joined together. The first body 111 and the second body 121 together form the first mounting part.

[0051] The first mounting part is secured by fasteners such as screws or bolts. For example, the first mounting part has three mounting holes: one entirely located on the first body 111, one entirely located on the second body 121, and one partially located on both the first and second bodies 111. For instance, the first hole is located on the first body 111, and the second hole is located on the second body 121. Thus, the first body 111 and the second body 121 can be secured using fasteners.

[0052] Reference Figures 4-9 As shown, this embodiment of the present disclosure also provides a hinge, including a first hinge seat 10, a second hinge base 20, and a rotating mechanism 30. The first hinge seat 10 is a fixed hinge seat according to any of the first aspects of the present disclosure. The second hinge base 20 includes a third hinge portion 21 and a second mounting portion 22, and the third hinge portion 21 is provided with a receiving cavity 23. The rotating mechanism 30 is used to rotatably mount the second hinge base 20 onto the first hinge base 10.

[0053] Reference Figure 6 As shown, the rotating mechanism 30 includes a first helical body 31, a spring assembly 32, a second helical body 33, and a connecting shaft 34. The first hinge portion, the second hinge portion, and the third hinge portion 21 are coaxially arranged with the rotating mechanism. The connecting shaft 34 passes through the first helical body 31, the spring assembly 32, and the second helical body 33, and its two ends are respectively axially connected to the first hinge portion and the second hinge portion.

[0054] The hinge in this embodiment adopts the fixed hinge seat of the first aspect of this disclosure. The first hinge seat 10 does not need to be provided with a closed structure on the side, which reduces the installation complexity, reduces the number of accessories, and is convenient and practical.

[0055] Reference Figures 2-3 , Figure 6 as well as Figure 9 As shown, through grooves 14 are provided on opposite sides of the first hinge portion 112 and the second hinge portion 122, and each through groove 14 is provided with an inner spiral arc surface 15. A first outer spiral arc surface 311, which mates with the inner spiral arc surface 15, is provided on the mating side of the first spiral body 31 and the first hinge portion 112. A second outer spiral arc surface 331, which mates with the inner spiral arc surface 15, is provided on the mating side of the second spiral body 33 and the second hinge portion 122. The spiral directions of the first outer spiral arc surface 311 and the second outer spiral arc surface 312 are opposite.

[0056] The inner wall of the receiving cavity 23 is provided with a protrusion 231 arranged along the length of the receiving cavity 23, and the outer walls of the first spiral body 31 and the second spiral body 33 are provided with grooves 35 that cooperate with the protrusion 231. During the opening of the door, the protrusion 231 in the receiving cavity drives the first spiral body 31 and the second spiral body 33 to rotate together. At the same time, the first spiral body and the second spiral body move inward along the axial direction due to the rotational motion, compressing the spring assembly 32, so that the elastic force generated by the spring assembly can overcome the weight of the door.

[0057] like Figure 1 As shown, the hinge also includes a connecting shaft 34, at least one helical body, and at least one spring. The connecting shaft 34 passes through the spring and the helical body, and its two ends are fixedly connected to the first hinge portion and the second hinge portion, respectively. When the hinge has a spring, a helical body is required.

[0058] When the hinge has no spring, there can be 0-2 helices. For example... Figure 1 As shown, the hinge also includes a connecting shaft 34 and at least one helical body. The connecting shaft 34 passes through the helical body and its two ends are fixedly connected to the first hinge portion and the second hinge portion, respectively. The hinge may include one or two helical bodies.

[0059] The hinge also includes a connecting shaft 34, with its two ends connected to the first hinge portion and the second hinge portion respectively, meaning the hinge has no helical body or spring.

[0060] During the rotation of the first helix 31 and the second helix 33 along the opening direction of the door, the first helix 31 and the second helix 33 move inward along the axial direction, while compressing the spring assembly. The spring assembly provides an outward elastic force along the axial direction. The first helix 31 and the second helix 33 are subjected to an outward force along the axial direction, and the outer helical arc surface and the inner helical arc surface generate a torque that can drive the second hinge seat to overcome the weight of the door itself.

[0061] During the rotation of the first helix 31 and the second helix 33 along the closing direction of the door, the first helix 31 and the second helix 33 move outward along the axial direction. At the same time, the elastic force of the spring assembly under compression gradually decreases. The spring assembly provides an outward elastic force along the axial direction, giving the first helix and the second helix an outward supporting force. The outer helical arc surface and the inner helical arc surface of the first helix and the second helix generate a torque that can drive the second hinge seat to overcome the weight of the door itself.

[0062] The door hinge disclosed herein features a first hinge portion and a second hinge portion on both sides of a first hinge seat, and a third hinge portion of a second hinge seat is helically connected to the first and second hinge portions respectively. Through the cooperation of a rotating assembly, the double helixes on both sides of the second hinge seat reduce the pressure of the spring assembly on the helical structure, enhancing the stability of the hinge and enabling it to accommodate larger freezer sizes. Furthermore, the first hinge seat is divided into a first part and a second part that are inserted and assembled, facilitating the installation of the hinge.

[0063] Reference Figure 8 and Figure 9 As shown, the spring assembly may include a first spring and a second spring. The first spring is sleeved on the outside of the second spring, and the two are coaxially arranged. This dual-spring design allows the second spring to play a primary role during door opening and closing. When the door opens at a large angle, the second spring prevents excessive spring force, which could cause an impact when opening the door. When the door opens at a small angle, the first and second springs work together to prevent insufficient force due to a small angle, which could lead to door instability.

[0064] Reference Figure 4 and Figure 6As shown, in one disclosed embodiment, a first positioning part 113 protrudes from the first hinge part 112, and a second positioning part 123 protrudes from the second hinge part 122, with the first positioning part 113 and the second positioning part 123 being disposed opposite to each other.

[0065] Reference Figure 6 As shown, the hinge also includes a connecting rod 40. The second mounting part 22 is provided with at least one protruding rib 24. The protruding rib 24 is provided with an insertion hole corresponding to the positioning hole on the first positioning part 113 and the second positioning part 123. The connecting rod 40 passes through the first positioning part 113, the insertion hole and the second positioning hole 123.

[0066] The first and second positioning parts are provided with initial angle positioning holes. In the assisted hinge, when opening the freezer door, a smaller force is needed to open the door. At this time, the hinge cannot stop in the closed state on its own. The connecting rod 40 is used for limiting.

[0067] A limiting part is provided on the outer side of the third hinge part of the second hinge seat. The limiting part, the first positioning part, and the second positioning part can be used to limit the maximum opening angle of the hinge.

[0068] A hinge assembly method includes: preparing a first hinge seat and a second hinge seat, wherein the first hinge seat is a fixed hinge seat of the present disclosure; a first part of the first hinge seat is connected to one end of a third hinge portion of the second hinge seat; a second part of the first hinge seat is connected to the other end of the third hinge portion; and the third hinge portion is rotatably installed between the first hinge portion and the second hinge portion.

[0069] This disclosure provides an opening and closing device, including a housing and a door, wherein the door is rotatably mounted on the housing via a fixed hinge seat or a hinge as described in any of the present disclosures.

[0070] The opening and closing device disclosed herein can be any door device or equipment that opens and closes up and down around a hinge. In practical applications, the opening and closing device can be any device or equipment that opens and closes up and down, such as a freezer, a storage cabinet, or a mechanical device. Any opening and closing device that uses the hinge disclosed herein is within the protection scope of this disclosure.

[0071] The opening and closing device disclosed herein adopts a split plug-in structure for the first hinge seat of the hinge, which reduces assembly complexity and facilitates installation and use.

[0072] In the description of this disclosure, it should be understood that the terms "inner," "outer," etc., indicate the location or positional relationship based on the location or positional relationship shown in the accompanying drawings. This description is only for the convenience of describing the present invention and for simplifying the description, and is not intended to indicate or imply that the device elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0073] The above detailed description is a specific description of the feasible embodiments of this disclosure. These embodiments are not intended to limit the scope of protection of this disclosure. All equivalent implementations or modifications that do not depart from this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A fixed hinge seat, characterized in that, include The first part includes a first body and a first hinge portion; The second part includes a second body and a second hinge portion. The first part and the second part are assembled at both ends of the rotating hinge seat. After the first part and the second part are assembled, the first body and the second body as a whole form a first mounting part. The first hinge portion and the second hinge portion are spaced apart.

2. The fixed hinge seat according to claim 1, characterized in that, The first hinge portion and / or the second hinge portion are provided with through grooves, and at least one of the through grooves is provided with an inner spiral arc surface.

3. The fixed hinge seat according to claim 2, characterized in that, The first hinge portion and the second hinge portion are also provided with insertion holes.

4. The fixed hinge seat according to claim 3, characterized in that, The first hinge portion and the second hinge portion are also provided with a shaft, which is coaxially arranged with the insertion hole of the first hinge portion and the second hinge portion, and the shaft is provided with an insertion hole.

5. The fixed hinge seat according to any one of claims 1-4, characterized in that, The first part and the second part are detachably connected.

6. The fixed hinge seat according to claim 5, characterized in that, The first body includes a first side portion and a first overlapping portion, the first hinge portion is connected to the first side portion, the second body includes a second side portion and a second overlapping portion, the second hinge portion is connected to the second side portion, and the first overlapping portion and the second overlapping portion are plugged into each other.

7. The fixed hinge seat according to claim 6, characterized in that, The first overlapping part is provided with a buckle and / or a locking hole, and the second overlapping part is provided with a locking hole and / or a buckle. The first overlapping part and the second overlapping part overlap and are fixed by the buckle and the locking hole.

8. The fixed hinge seat according to claim 7, characterized in that, The thickness of the first overlapping portion is smaller than that of the second overlapping portion, and after the first overlapping portion and the second overlapping portion are assembled, they are flush with the first side portion or the second side portion.

9. The fixed hinge seat according to any one of claims 6-8, characterized in that, The first overlapping portion includes a first connecting portion and a first flat portion. The first connecting portion is located between the first side portion and the first flat portion. A step is formed between the first connecting portion and the first flat portion. The thickness of the first connecting portion gradually decreases from the first side portion to the first flat portion. The second overlapping portion includes a second flat portion and a second connecting portion adapted to the first connecting portion.

10. The fixed hinge seat according to claim 1, characterized in that, One end of the first body and one end of the second body are disposed adjacent to each other. The first body is provided with a first hole and the second body is provided with a second hole. The first hole and the second hole are combined to form a mounting hole.

11. A hinge, characterized in that, include The first hinge seat is a fixed hinge seat as described in any one of claims 1 to 10; The second hinge seat includes a third hinge portion and a second mounting portion. The third hinge portion is provided with a receiving cavity and is rotatably mounted between the first hinge portion and the second hinge portion.

12. The hinge according to claim 11, characterized in that, The hinge further includes a connecting shaft, at least one helical body, and at least one spring. The connecting shaft passes through the spring and the helical body, and its two ends are respectively fixedly connected to the first hinge portion and the second hinge portion; or The hinge further includes a connecting shaft and at least one helical body, the connecting shaft passing through the helical body and having its two ends fixedly connected to the first hinge portion and the second hinge portion, respectively; or The hinge also includes a connecting shaft, the two ends of which are connected to the first hinge portion and the second hinge portion, respectively.

13. The hinge according to claim 12, characterized in that, The inner wall of the receiving cavity is provided with a protrusion along the length of the receiving cavity, and the outer wall of at least one spiral body is provided with a groove that cooperates with the protrusion.

14. The hinge according to claim 11, characterized in that, The first hinge portion has a protruding first positioning portion, and the second hinge portion has a protruding second positioning portion, with the first positioning portion and the second positioning portion being arranged opposite to each other; The hinge also includes a connecting rod. The second mounting part is provided with at least one protruding rib. The protruding rib is provided with an insertion hole corresponding to the positioning hole on the first positioning part and the second positioning part. The connecting rod passes through the first positioning part, the insertion hole and the second positioning hole.

15. An opening and closing device, characterized in that, include: Box; The door body is rotatably mounted on the housing by a fixed hinge seat as described in any one of claims 1 to 10 or a hinge as described in any one of claims 11 to 14.

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