Hinge, and opening and closing apparatus

Abstract

Disclosed in the present utility model are a hinge, and an opening and closing apparatus. The hinge comprises: a first hinge seat comprising a first hinge portion and a first mounting portion, the first mounting portion being configured to be connected to a door of the opening and closing apparatus; and a second hinge seat comprising a second hinge portion and a second mounting portion, the second hinge portion being rotatably connected to the first hinge portion, the second mounting portion being configured to be connected to a box of the opening and closing apparatus, reinforcing holes being further provided in the second hinge portion, and the reinforcing holes being docked with reinforcing protrusions on the box of the opening and closing apparatus. The hinge of the present utility model can prevent backward tilting during door opening, and has a firm and reliable structure.

Description

Hinges and opening and closing devices Technical Field

[0001] The utility model relates to the field of hinges, in particular to a hinge and an opening and closing device. Background Art

[0002] A door hinge is a device installed on the door body to open and close the door. For example, a door hinge installed on a freezer consists of a fixed base connected to the cabinet body, a rotating base connected to the door body, and a core shaft that runs through the fixed and rotating bases. Some door hinges also include an elastic member.

[0003] The force of opening the door, the elastic force of the elastic member, and the inertia of the door hinge create a very large torque, which exerts a significant force on the rotating base during rotation. Since the rotating base and the fixed base are fixed together via a core shaft, this force causes the fixed base to tilt backward. If the fixed base is connected to the cabinet body solely by screws, this backward tilt cannot be completely avoided, resulting in a less secure door hinge structure and a tendency for the hinge to loosen after prolonged use.

[0004] Utility Model Content

[0005] The utility model provides a hinge and an opening and closing device that can prevent the door from tilting backward when opening and has a firm and reliable structure, which is achieved through the following technical solutions:

[0006] A hinge comprising:

[0007] a first hinge seat, the first hinge seat comprising a first hinge portion and a first mounting portion, the first mounting portion being used to connect to a door body of the opening and closing device;

[0008] The second hinged seat includes a second hinged portion and a second mounting portion. The second hinged portion is rotatably connected to the first hinged portion. The second mounting portion is used to connect to the box body of the opening and closing device. A reinforcement hole is also provided on the second hinged portion, and the reinforcement hole is docked with the reinforcement protrusion on the box body of the opening and closing device.

[0009] Optionally, the direction in which the reinforcement hole is opened is perpendicular to the extending direction of the second mounting portion; and / or,

[0010] The second hinge portion has a second connection surface parallel to the extension direction of the second mounting portion, and the reinforcement hole is opened on the second connection surface; and / or,

[0011] The second hinge portion has a first connection surface vertically connected to the second mounting portion and a second connection surface vertically connected to the first connection surface, and the reinforcement hole is opened on the second connection surface.

[0012] Optionally, a plurality of the reinforcement holes are provided, and the plurality of reinforcement holes are arranged in sequence along the axial direction of the second mounting portion.

[0013] Optionally, a first limiting protrusion is provided on the first mounting portion, and a first limiting groove is provided on the second mounting portion. When the opening and closing device is at the maximum door opening angle, the first limiting protrusion is clamped in the first limiting groove and is interference fit with the first limiting groove.

[0014] Optionally, it also includes:

[0015] The piston comprises a first hinge portion having a first mating structure, a second hinge portion having a second accommodating cavity and a second opening, the piston being disposed in the second accommodating cavity, the piston having a second mating structure, and the second mating structure abutting against the first mating structure through the second opening;

[0016] an elastic member, the elastic member being disposed in the second accommodating cavity and located at an end of the piston away from the second matching structure, the elastic member being capable of providing assistance for the abutting state;

[0017] A connecting shaft is provided, wherein the connecting shaft passes through the first hinge part, the piston, the elastic member and the second hinge part, so that the first hinge part and the second hinge part are relatively fixed along the axial direction.

[0018] Optionally, the second mating structure includes a first helical surface, and the first mating structure includes a first mating surface corresponding to the first helical surface.

[0019] Optionally, the second mating structure further includes a second helical surface and a third helical surface, the first helical surface, the second helical surface and the third helical surface are connected in sequence, the second helical surface has a helical direction opposite to that of the first helical surface, and the third helical surface has a helical direction the same as that of the first helical surface; the first mating structure further includes a second mating surface connected to the first mating surface, the second mating surface has a helical direction opposite to that of the first mating surface;

[0020] When the opening and closing device is in the open state, the first mating surface abuts against the first spiral surface; when the opening and closing device is in the closed state, the second mating surface abuts against the second spiral surface, and the first mating surface abuts against the third spiral surface.

[0021] Optionally, the second mating surface is provided with the second limiting protrusion, the side wall of the piston is provided with an axially extending guide groove, and the side wall of the second accommodating cavity is provided with a corresponding guide protrusion, and the guide protrusion is arranged in the guide groove. When the opening and closing device is at the maximum door opening angle, the guide protrusion abuts against the second limiting protrusion.

[0022] Optionally, the second limiting protrusion can be broken when the force exceeds 45N.

[0023] Optionally, the second matching structure further includes a second side surface, and the first matching structure further includes a first side surface, and when the opening and closing device is at a maximum door opening angle, the first side surface abuts against the first side surface; and / or,

[0024] The second matching structure further includes a second top surface, and the first matching structure further includes a first top surface. When the opening and closing device is at a maximum door opening angle, the first top surface abuts against the second top surface.

[0025] Optionally, it further includes fasteners connected to both ends of the connecting shaft to relatively fix the first hinge seat and the second hinge seat in the axial direction; and / or,

[0026] The invention also includes a gasket, wherein the gasket has a non-circular hole in the center, and the end of the connecting shaft penetrates into the non-circular hole and is riveted to the gasket; or, the gasket has a polygonal hole in the center, and the end of the connecting shaft penetrates into the polygonal hole and is riveted to the gasket; and / or,

[0027] The piston is provided with a weight-reducing hole; and / or,

[0028] A first positioning protrusion is provided along the center of the bottom end of the piston, and the first positioning protrusion is used to position the elastic member; and / or,

[0029] A second positioning protrusion is provided along the center of the bottom end of the second accommodating cavity, and the second positioning protrusion is used to position the elastic member; and / or,

[0030] The first mounting portion is provided with a first mounting hole, and the second mounting portion is provided with a second mounting hole; and / or,

[0031] The first mounting portion is provided with a first reinforcing rib, and the second mounting portion is provided with a second reinforcing rib; and / or,

[0032] The first hinged portion and the first mounting portion are an integrated structure, and the second hinged portion and the second mounting portion are an integrated structure.

[0033] An opening and closing device, comprising:

[0034] The box body has a box opening, and the box body is provided with a reinforcement protrusion;

[0035] The door body is hinged to the box opening of the box body through the hinge described in any of the preceding items, and the reinforcement hole of the hinge is docked with the reinforcement protrusion.

[0036] The box body is provided with a groove, and the reinforcing protrusion is arranged in the groove.

[0037] Such a design has the following advantages: the first hinge seat is connected to the door body of the opening and closing device through the first mounting portion, and the second hinge seat is connected to the box body of the opening and closing device through the second mounting portion, so that the door body and the box body are hinged. Among them, the reinforcing protrusion on the box body of the opening and closing device is adapted to the reinforcing hole on the second hinge portion. When the second mounting portion is connected to the box body, the reinforcing protrusion is inserted into the reinforcing hole. The connection strength between the second hinge seat and the box body can be further strengthened by the cooperation between the reinforcing hole and the reinforcing protrusion. In this way, when the opening and closing device opens the door, the protrusion of the box body can limit the second hinge seat through the reinforcing hole, so that the hinge no longer tilts back after being stressed, achieving an anti-tilt effect, and making the hinge structure stable and reliable and will not loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic diagram of the overall structure of an embodiment of a hinge of the present invention;

[0039] FIG2 is a schematic diagram of the exploded structure of the hinge of FIG1 ;

[0040] FIG3 is a structural diagram of the hinge of FIG1 from another perspective;

[0041] FIG4 is a schematic cross-sectional view of the hinge of FIG1 ;

[0042] FIG5 is a schematic structural diagram of the second hinge seat of the hinge in FIG1 ;

[0043] FIG6 is a schematic structural diagram of the piston of the hinge of FIG1;

[0044] FIG7 is a structural diagram of the piston of the hinge of FIG1 from another perspective;

[0045] FIG8 is a schematic structural diagram of the first hinge seat of the hinge in FIG1;

[0046] FIG9 is a schematic structural diagram of the gasket of the hinge of FIG1;

[0047] FIG10 is a schematic structural diagram of the hinge and the opening and closing device in FIG1;

[0048] FIG11 is a schematic diagram of a partial structure of the box body of the opening and closing device in FIG10;

[0049] FIG12 is a schematic diagram of a partial structure of the hinge in FIG1 when the opening and closing device is in a closed state;

[0050] FIG13 is a schematic diagram of the partial structure of the hinge in FIG1 when the opening and closing device is in the door-opening state.

[0051] Meanings of reference numerals in the figures: 1. first hinge seat; 11. first hinge portion; 112. first accommodating cavity; 113. first opening; 114. first mating surface; 115. second mating surface; 116. first side surface; 117. first top surface; 118. second limiting protrusion; 12. first mounting portion; 121. first mounting hole; 122. first reinforcing rib; 123. first limiting protrusion; 2. second hinge seat; 21. second hinge portion; 211. reinforcing hole; 212. second accommodating cavity; 213. second opening; 214. first connecting surface; 215. second connecting surface; 216. second positioning protrusion; 217. guide protrusion; 22. second mounting portion; 221. second mounting hole; 222. second reinforcing rib; 223. first limiting groove; 3. Piston; 31. First helical surface; 32. Second helical surface; 33. Third helical surface; 34. Second side surface; 35. Second bottom surface; 36. Second top surface; 37. Weight-reducing hole; 38. First positioning protrusion; 39. Guide groove; 4. Elastic member; 5. Connecting shaft; 6. Gasket; 61. Non-circular hole; 71. Box body; 711. Reinforcement protrusion; 713. Depression; 72. Door body. DETAILED DESCRIPTION

[0052] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.

[0053] As shown in Figures 1 and 10-13, this embodiment provides a hinge, including:

[0054] A first hinged seat 1, comprising a first hinge portion 11 and a first mounting portion 12, wherein the first mounting portion 12 is configured to be connected to a door body 72 of an opening and closing device;

[0055] The second hinged seat 2 includes a second hinged portion 21 and a second mounting portion 22. The second hinged portion 21 is rotatably connected to the first hinged portion 11. The second mounting portion 22 is used to connect to the box body 71 of the opening and closing device. A reinforcement hole 211 is also provided on the second hinged portion 21, and the reinforcement hole 211 is docked with the reinforcement protrusion 711 on the box body 71 of the opening and closing device.

[0056] In this embodiment, the first hinged seat 1 is a rotating seat, and the second hinged seat 2 is a fixed seat. The hinge can be connected between the door 72 and the cabinet 71 of an opening and closing device (such as a freezer), thereby hingedly connecting the door 72 and the cabinet 71. The first mounting portion 12 is provided with a first mounting hole 121, and the second mounting portion 22 is provided with a second mounting hole 221. The first hinged seat 1 can be screwed through the first mounting hole 121 to connect to the door 72, and the second hinged seat 2 can be screwed through the second mounting hole 221 to connect to the cabinet 71.

[0057] In this embodiment, the first hinge seat 1 is connected to the side wall of the door body 72 through the first mounting portion 12 and rotates with the door body 72. The second hinge seat 2 is connected to the side wall of the box body through the second mounting portion 22. When the door body 72 and the box body are closed, the first hinge portion 11 and the second hinge portion 21 can be regarded as being in the same plane.

[0058] The hinge has a first position and a second position. The first hinge seat 1 can reciprocate relative to the second hinge seat 2 within a preset angle range, causing the first and second mating structures to slide relative to each other, thereby switching the hinge between the first and second positions. During assembly, the hinge's first position can correspond to the closed state of the door body 72 of the opening and closing device, or a state in which the door body 72 is open at a relatively small angle. The second position can correspond to the maximum open state of the door body 72 of the opening and closing device, or a state in which the door body 72 is open at a relatively large angle.

[0059] The reinforcing protrusion 711 on the housing 71 of the opening and closing device mates with the reinforcing hole 211 on the second hinge portion 21. When the second mounting portion 22 is connected to the housing 71, the reinforcing protrusion 711 is inserted into the reinforcing hole 211. The cooperation between the reinforcing hole 211 and the reinforcing protrusion 711 further strengthens the connection between the second hinge seat 2 and the housing 71. Thus, when the opening and closing device is opened, the protrusion on the housing 71 can limit the second hinge seat 2 through the reinforcing hole 211, preventing the hinge from tilting backward after being stressed, thus achieving a backward-preventing effect and ensuring a stable and secure hinge structure that will not loosen.

[0060] Furthermore, referring to Figure 1 , the direction in which the reinforcement hole 211 is opened is perpendicular to the extension direction of the second mounting portion 22. Furthermore, the second hinged portion 21 has a second connecting surface 215 parallel to the extension direction of the second mounting portion 22, and the reinforcement hole 211 is opened on the second connecting surface 215. Furthermore, the second hinged portion 21 has a first connecting surface 214 perpendicularly connected to the second mounting portion 22, and a second connecting surface 215 perpendicularly connected to the first connecting surface 214, and the reinforcement hole 211 is opened on the second connecting surface 215.

[0061] In this embodiment, the second mounting portion 22 is installed in a vertical direction, and the reinforcement hole 211 is opened in a horizontal direction. That is, the second hinge portion 21 is assembled with the box body 71 in a flat insertion manner.

[0062] This embodiment has the following advantages: (1) Compared with the bottom-insertion hinge, which is more troublesome to install and needs to lift the door body 72 of the opening and closing device before the hinge can be inserted, this hinge is a flat-insertion type, and does not need to lift the door body 72 during installation, and can be directly inserted; (2) Compared with the bottom-insertion hinge, there is a risk of backward tilting and falling out during strength testing. This flat-insertion hinge has better strength and can be limited in both the backward and upward directions without the risk of backward tilting and falling out; (3) Compared with the bottom-insertion hinge, which has a complex structure and is more difficult to design the box body 71, this hinge has a simple flat-insertion structure.

[0063] 1 , a plurality of reinforcement holes 211 are provided, and the plurality of reinforcement holes 211 are sequentially arranged along the axial direction of the second mounting portion 22. In this way, the connection strength between the second hinge seat 2 and the box body 71 can be further strengthened, thereby enhancing the anti-tilt effect.

[0064] Furthermore, a first limiting protrusion 123 is provided on the first mounting portion 12, and a first limiting groove 223 is provided on the second mounting portion 22. When the opening and closing device is at the maximum door opening angle, the first limiting protrusion 123 engages within the first limiting groove 223. Furthermore, when the first limiting protrusion 123 enters the first limiting groove 223, an interference fit is formed between the first limiting protrusion 123 and the first limiting groove 223, thereby preventing friction noise caused by shaking caused by the elasticity of the hinge. Furthermore, the door body 72 is also limited in position when the opening and closing device is at the maximum door opening angle, preventing the door body 72 from accidentally closing.

[0065] The first limiting protrusion 123 is configured as a block structure rather than a long strip structure (i.e., only the head is retained and the reinforcement portion extending from the back is eliminated). This is mainly due to the design requirements of the hinge: to ensure that the hinge cannot fail within a certain range of door opening force, and that the hinge can fail but cannot break when the door opening force exceeds a certain range. For example, the design requires that the hinge cannot fail when a force of 0N to 45N is used to push the door, so the first limiting protrusion 123 and the first limiting groove 223 are engaged to achieve the limit; and the design requires that the hinge can fail but cannot be damaged or broken when a force of 45N to 200N is used to push the door, so the first limiting protrusion 123 must be able to break with a force of about 50N. In this way, using a greater force to push the door will not cause the hinge to break, but will only cause the hinge to rotate excessively and fail.

[0066] Furthermore, referring to Figures 1-9, it also includes:

[0067] The piston 3 has a first mating structure, the first hinge portion 11 has a first mating structure, the second hinge portion 21 is provided with a second accommodating cavity 212 and a second opening 213, the piston 3 is disposed in the second accommodating cavity 212, and the piston 3 moves axially in the second accommodating cavity 212 via a guide structure. The piston 3 has a second mating structure, and the second mating structure abuts against the first mating structure through the second opening 213, and the first hinge seat 1 and the second hinge seat 2 can reciprocate relative to each other in the abutting state;

[0068] an elastic member 4, the elastic member 4 being disposed in the second accommodating cavity 212 and located at an end of the piston 3 away from the second matching structure, the elastic member 4 being capable of providing assistance for the abutting state;

[0069] The connecting shaft 5 passes through the first hinge part 11, the piston 3, the elastic member 4 and the second hinge part 21, so that the first hinge part 11 and the second hinge part 21 are relatively fixed along the axial direction.

[0070] Furthermore, the first hinged part 11 is provided with a first accommodating cavity 112, the first accommodating cavity 112 is provided with a first opening 113, the first opening 113 is opposite to and connected to the second opening 213, the first matching structure is provided in the first accommodating cavity 112, and the end of the first hinged part 11 provided with the first opening 113 is connected to the end of the second hinged part 21 provided with the second opening 213.

[0071] In this embodiment, since the elastic member 4 can provide assistance in the abutment state, the problem of violent collision between the door body 72 and the box body 71 caused by the rapid descent of the door body 72 can be alleviated during the closing process of the door body 72, thereby improving the user experience. At the same time, the piston 3 and the elastic member 4 are both disposed within the second accommodating cavity 212 of the second hinge seat 2, and the first hinge seat 1, the second hinge seat 2, the piston 3, and the elastic member 4 can be assembled and connected via the connecting shaft 5. This simple hinge is easy to assemble and reduces the space occupied by the hinge.

[0072] Further, referring to Figures 6 and 8, the second matching structure includes a first helical surface 31, and the first matching structure includes a matching surface corresponding to the first helical surface 31.

[0073] Furthermore, the second mating structure further includes a second helical surface 32 and a third helical surface 33. The first helical surface 31, the second helical surface 32, and the third helical surface 33 are sequentially connected along a first circumferential direction. The second helical surface 32 has a helical direction opposite to that of the first helical surface 31, and the third helical surface 33 has a helical direction identical to that of the first helical surface 31. The first mating structure further includes a second mating surface 115 connected to the first mating surface 114. The second mating surface 115 has a helical direction opposite to that of the first mating surface 114.

[0074] When the opening and closing device is in the open state, the first mating surface 114 abuts against the first spiral surface 31 ; when the opening and closing device is in the closed state, the second mating surface 115 abuts against the second spiral surface 32 , and the first mating surface 114 abuts against the third spiral surface 33 .

[0075] In this embodiment, the first helical surface 31 is used to support the door body 72 to reach a balanced state when the door is opened, so that the door body 72 can achieve a hovering effect. The second helical surface 32 is used to apply downward pressure to the door body 72 after the door is closed, ensuring that the door body 72 is closed more tightly. The third helical surface 33 is used to limit the relative position of the first hinge seat 1 and the second hinge seat 2 before the hinge is installed and used, to prevent the hinge from accidentally popping open during storage or transportation; if the third helical surface 33 and the first mating surface 114 do not cooperate, the first hinge seat 1 may rotate in a non-working direction (opposite to the direction of opening the door), and once the first hinge seat 1 rotates in the opposite direction, the hinge will fail and be scrapped. The third helical surface 33 abuts against the first mating surface 114, which acts as a limiter to prevent the first hinge seat 1 from rotating in the opposite direction, ensuring that the hinge can be installed on the opening and closing device for normal use.

[0076] Furthermore, referring to Figures 6 and 8 , the second mating structure further includes a second side surface 34, which is connected to the rear of the third helical surface 33 along the first circumferential direction. The first mating structure further includes a first side surface 116, which corresponds to the second side surface 34. When the opening and closing device is at the maximum door opening angle, the second side surface 34 abuts the first side surface 116. This helps limit the maximum door opening angle.

[0077] The second matching structure further includes a second bottom surface 35, which is connected to the front of the first helical surface 31 along the first circumferential direction. The first matching structure further includes a first bottom surface 118, which matches the second bottom surface 35.

[0078] Furthermore, referring to Figures 6 and 8 , the second mating structure further includes a second top surface 36 connected between the third spiral surface 33 and the second side surface 34. The first mating structure further includes a first top surface 117 corresponding to the second top surface 36. When the opening and closing device is at the maximum door opening angle, the first top surface 117 abuts the second top surface 36. This helps limit the maximum door opening angle.

[0079] Furthermore, referring to FIG. 6 , at least two second matching structures are provided on the piston 3 , and a second bottom surface 35 is also provided on the piston. The second bottom surface 35 is connected between two adjacent second matching structures.

[0080] Furthermore, the second mating surface 115 is provided with a second limiting protrusion 118, the side wall of the piston 3 is provided with an axially extending guide groove 39, and the side wall of the second accommodating cavity 212 is provided with a corresponding guide protrusion 217. The guide protrusion 217 is disposed in the guide groove 39. When the opening and closing device is at the maximum door opening angle, the guide protrusion 217 abuts against the second limiting protrusion 118. In this way, the maximum door opening angle can be limited.

[0081] Furthermore, please refer to Figures 2-4, which also includes fasteners, which are connected to both ends of the connecting shaft 5 so that the first hinge seat 1 and the second hinge seat 2 are relatively fixed in the axial direction. Please refer to Figure 9, which also includes a gasket 6, the center of which has a non-circular hole 61, and the end of the connecting shaft 5 is inserted into the non-circular hole 61 and riveted to the gasket 6. Furthermore, the non-circular hole 61 of the gasket 6 is a polygonal hole, such as a regular hexagon. In this way, when the connecting shaft 5 is riveted to the gasket 6, the relative fixation of the gasket 6 and the core shaft can be guaranteed, which plays a limiting role and avoids damage. Because the core shaft and the gasket 6 rotate relative to each other and continuous friction occurs, it may cause strength problems, such as wearing off the riveted parts.

[0082] Furthermore, referring to Figure 7 , the piston 3 is provided with weight-reducing holes 37. Multiple weight-reducing holes 37 are spaced circumferentially about the central axis of the piston 3. This reduces the weight of the piston 3 and hinge, and avoids injection molding defects that may occur during solid injection molding of the piston 3.

[0083] Furthermore, referring to Figures 4 and 7 , a first positioning protrusion 38 is centrally located at the bottom end of the piston 3, which serves to position the elastic member 4. A second positioning protrusion 216 is centrally located at the bottom end of the second accommodating chamber 212, which serves to position the elastic member 4. Positioning the elastic member 4 with the first and second positioning protrusions 38 and 216 prevents movement and reduces wear. Furthermore, given that the bottom end of the second hinged base 2 is provided with a countersunk hole corresponding to the fastener at the end of the connecting shaft, the second positioning protrusion 216 also serves to enhance the structural strength of the second hinged base 2.

[0084] 3 , the first mounting portion 12 is provided with a plurality of first reinforcing ribs 122 , and the second mounting portion 22 is provided with a plurality of second reinforcing ribs 222 . In this way, the structural strength of the first mounting portion 12 and the second mounting portion 22 can be enhanced.

[0085] Furthermore, the first hinge portion 11 and the first mounting portion 12 may be formed into an integral structure by injection molding, and the second hinge portion 21 and the second mounting portion 22 may be formed into an integral structure by injection molding.

[0086] Referring to Figure 10, this embodiment provides an opening and closing device, including the hinge described in any of the preceding items. The opening and closing device may be a refrigerator, specifically a bedroom refrigerator with a top-opening door. The opening and closing device may also be other devices that can be opened and closed, such as a dishwasher, a storage cabinet, etc.

[0087] Opening and closing equipment includes:

[0088] The box body 71 has a box opening and is provided with a reinforcement protrusion 711. The side wall of the box body 71 corresponding to the reinforcement protrusion 711 can be provided with a groove 714 structure to cooperate with the installation of the first mounting portion 12 and the second mounting portion 22 of the hinge, thereby reducing the protrusion of the hinge;

[0089] The door body 72 is hinged to the box opening of the box body 71 through any of the hinges described above, and the reinforcement hole 211 of the hinge is connected to the reinforcement protrusion 711.

[0090] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the scope of protection of the present invention. Any equivalent implementation or modification that does not depart from the scope of protection of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hinge, characterized in that: include: A first hinge seat (1), the first hinge seat (1) comprising a first hinge portion (11) and a first mounting portion (12), the first mounting portion (12) being used to connect to a door body (72) of an opening and closing device; A second hinged seat (2), the second hinged seat (2) comprising a second hinged portion (21) and a second mounting portion (22), the second hinged portion (21) being rotatably connected to the first hinged portion (11), the second mounting portion (22) being used to be connected to a box body (71) of an opening and closing device, the second hinged portion (21) being further provided with a reinforcement hole (211), the reinforcement hole (211) being docked with a reinforcement protrusion (711) on the box body (71) of the opening and closing device.

2. The hinge according to claim 1, characterized in that: The direction in which the reinforcement hole (211) is opened is perpendicular to the extending direction of the second mounting portion (22); and / or, The second hinged portion (21) has a second connecting surface (215) parallel to the extending direction of the second mounting portion (22), and the reinforcement hole (211) is opened on the second connecting surface (215); and / or, The second hinged portion (21) comprises a first connecting surface (214) vertically connected to the second mounting portion (22) and a second connecting surface (215) vertically connected to the first connecting surface (214), and the reinforcement hole (211) is provided on the second connecting surface (215).

3. The hinge according to claim 1, characterized in that: A plurality of the reinforcement holes (211) are provided, and the plurality of reinforcement holes (211) are arranged in sequence along the axial direction of the second mounting portion (22).

4. The hinge according to claim 1, characterized in that: The first mounting portion (12) is provided with a first limiting protrusion (123), and the second mounting portion (22) is provided with a first limiting groove (223); when the opening and closing device is at a maximum door opening angle, the first limiting protrusion (123) is snap-fitted into the first limiting groove (223) and is in interference fit with the first limiting groove (223).

5. The hinge according to any one of claims 1 to 4, characterized in that: Also includes: A piston (3), wherein the first hinged portion (11) has a first matching structure, the second hinged portion (21) is provided with a second accommodating cavity (212) and a second opening (213), the piston (3) is arranged in the second accommodating cavity (212), the piston (3) has a second matching structure, and the second matching structure abuts against the first matching structure through the second opening (213); an elastic member (4), the elastic member (4) being arranged in the second accommodating cavity (212) and located at an end of the piston (3) away from the second matching structure, the elastic member (4) being capable of providing assistance for the abutting state; A connecting shaft (5) is provided through the first hinged portion (11), the piston (3), the elastic member (4) and the second hinged portion (21), so that the first hinged portion (11) and the second hinged portion (21) are relatively fixed in the axial direction.

6. The hinge according to claim 5, characterized in that: The second matching structure comprises a first helical surface (31), and the first matching structure comprises a first matching surface (114) corresponding to the first helical surface (31).

7. The hinge according to claim 6, characterized in that: The second matching structure further comprises a second helical surface (32) and a third helical surface (33); the first helical surface (31), the second helical surface (32) and the third helical surface (33) are connected in sequence; the second helical surface (32) has a helical direction opposite to that of the first helical surface (31); the third helical surface (33) has a helical direction identical to that of the first helical surface (31); the first matching structure further comprises a second matching surface (115) connected to the first matching surface (114); the second matching surface (115) has a helical direction opposite to that of the first matching surface (114); When the opening and closing device is in the door opening state, the first matching surface (114) and the first spiral surface (31) Abutting, when the opening and closing device is in a closed state, the second matching surface (115) abuts against the second spiral surface (32), and the first matching surface (114) abuts against the third spiral surface (33).

8. The hinge according to claim 7, characterized in that: A second limiting protrusion (118) is provided on the second mating surface (115), an axially extending guide groove (39) is provided on the side wall of the piston (3), a corresponding guide protrusion (217) is provided on the side wall of the second accommodating cavity (212), the guide protrusion (217) is arranged in the guide groove (39), and when the opening and closing device is at the maximum door opening angle, the guide protrusion (217) abuts against the second limiting protrusion (118); and / or, The second matching structure further includes a second side surface (34), and the first matching structure further includes a first side surface (116), and when the opening and closing device is at a maximum door opening angle, the second side surface (34) abuts against the first side surface (116); and / or, The second matching structure also includes a second top surface (36), and the first matching structure also includes a first top surface (117). When the opening and closing device is at a maximum door opening angle, the first top surface (117) abuts against the second top surface (36).

9. The hinge according to claim 8, characterized in that: The second limiting protrusion (118) can be broken when the force exceeds 45N.

10. The hinge according to claim 5, characterized in that: It also includes a fastener, which is connected to both ends of the connecting shaft (5) so that the first hinge seat (1) and the second hinge seat (2) are relatively fixed in the axial direction; and / or, It also comprises a gasket (6), the center of which has a non-circular hole (61), the end of the connecting shaft (5) penetrates into the non-circular hole (61) and is riveted to the gasket (6); or, the center of the gasket (6) has a polygonal hole, the end of the connecting shaft (5) penetrates into the polygonal hole and is riveted to the gasket (6); and / or, The piston (3) is provided with a weight-reducing hole (37); and / or, A first positioning protrusion (38) is provided along the center of the bottom end of the piston (3), and the first positioning protrusion (38) is used to position the elastic member (4); and / or, A second positioning protrusion (216) is provided along the center of the bottom end of the second accommodating cavity (212), and the second positioning protrusion (216) is used to position the elastic member (4); and / or, The first mounting portion (12) is provided with a first mounting hole (121), and the second mounting portion (22) is provided with a second mounting hole (221); and / or, The first mounting portion (12) is provided with a first reinforcing rib (122), and the second mounting portion (22) is provided with a second reinforcing rib (222); and / or, The first hinged portion (11) and the first mounting portion (12) are an integral structure, and the second hinged portion (21) and the second mounting portion (22) are an integral structure.

11. An opening and closing device, characterized in that: include: A box body (71) having a box opening, wherein a reinforcing protrusion (711) is provided on the box body (71); A door body (72), wherein the door body (72) is hinged at the box opening of the box body (71) by means of the hinge described in any one of claims 1 to 10, and the reinforcement hole (211) of the hinge is butted against the reinforcement protrusion (711).

12. The opening and closing device according to claim 11, characterized in that: The box body is provided with a groove (714), and the reinforcing protrusion is arranged in the groove (714).

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