Hinge and opening and closing equipment

Abstract

The utility model discloses a hinge and opening and closing equipment. A first hinge seat comprises a first hinge part; the second hinge seat comprises a second hinge part and a second mounting part, the second hinge part is rotatably connected with the first hinge part, at least one groove is formed in the front side of the second mounting part in the height direction, the second hinge seat is further provided with an elastic part corresponding to the groove, and the elastic part comprises a fixed end and a free end; the free end is far away from the second hinge part relative to the fixed end, when the free end protrudes out of the groove, the part, protruding out of the groove, of the free end is fixedly clamped with the opening and closing body, and the free end elastically retracts to be close to the groove so as to release connection with the opening and closing body; and / or, the second mounting part is provided with a mounting hole, the opening and closing main body is provided with a matching hole, and the second mounting part is assembled with the mounting hole and the matching hole through fasteners, so that the second mounting part is fixed with the opening and closing main body. According to the embodiment of the invention, the hinge does not lean backwards after being stressed, so that the anti-back-leaning effect is achieved, and the fastener can further improve the fixing reliability of the second mounting part.

Description

Technical Field

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

[0002] A hinge is an opening and closing device installed between a door and a cabinet. It mainly consists of a fixed base connected to the cabinet, a rotating base connected to the door, and a pivot shaft running through both. In existing technologies, the installation and securing of hinges have certain limitations, such as inconvenient installation and insufficiently secure fixing. As users' demands for device performance increase, there is an urgent need for a new type of hinge to solve these problems and improve the overall performance and user experience of opening and closing devices. Utility Model Content

[0003] According to a first aspect of this disclosure, this disclosure provides a hinge, including...

[0004] The first hinge seat includes a first hinge portion;

[0005] The second hinge seat includes a second hinge part and a second mounting part. The second hinge part is rotatably connected to the first hinge part. The second mounting part is used to be installed in the mounting cavity of the opening and closing body. The front side of the second mounting part is provided with at least one groove along the height direction. The second hinge seat is also provided with an elastic part corresponding to the groove. The elastic part includes a fixed end and a free end. The free end is disposed away from the second hinge part relative to the fixed end. When the free end protrudes from the groove, the part of the free end protruding from the groove is engaged and fixed with the opening and closing body. The free end elastically retracts close to the groove to disengage from the opening and closing body.

[0006] And / or, the second mounting part is provided with a mounting hole, and the opening and closing body is provided with a mating hole corresponding to the mounting hole. The second mounting part is assembled with the mounting hole and the mating hole by fasteners so as to fix the second mounting part to the opening and closing body.

[0007] In some of the disclosed embodiments, there are two grooves, which are spaced apart along the length of the second mounting portion, and each groove is provided with an elastic portion.

[0008] In some of the disclosed embodiments, the second mounting portion includes a middle portion located between the two grooves and edge portions located on both sides of the two grooves, with the mounting hole located in the middle portion.

[0009] In some of the disclosed embodiments, the second mounting portion includes a middle portion located between the two grooves and an edge portion located on both sides of the two grooves, and the edge portion is provided with a through hole.

[0010] In some of the disclosed embodiments, the elastic portion includes a flat plate portion and a wedge-shaped portion, the connection end of the wedge-shaped portion and the flat plate portion is stepped, the wedge-shaped portion is disposed away from the second hinge portion relative to the flat plate portion, one end of the flat plate portion is connected to the top end of the receiving groove to form the fixed end, the other end of the flat plate portion is connected to the wedge-shaped portion, and the wedge-shaped portion forms the free end.

[0011] In some of the disclosed embodiments, the thickness of the wedge gradually increases from the end of the wedge away from the flat plate to the end of the wedge closer to the flat plate; and / or, the groove extends through the bottom of the second mounting portion; and / or, the wedge protrudes relatively from the front of the second mounting portion, the wedge including a planar positioning surface, and an inclined surface is formed between the positioning surface and the bottom surface of the wedge.

[0012] In some of the disclosed embodiments, the mounting hole is a screw hole; or, the mounting hole includes a first hole segment and a second hole segment arranged coaxially, the first hole segment being disposed relative to the second hole segment near the front side of the second mounting part, the second hole segment being at least partially provided with threads, and the mating hole being provided with threads.

[0013] In some of the disclosed embodiments, the number of the groove and the mounting hole is one, the groove is provided with an elastic part, and the elastic part and the mounting hole are spaced apart.

[0014] In some of the disclosed embodiments, the first hinge seat further includes a first mounting portion, the first mounting portion having a first mounting hole for engaging with a fastener to secure the first mounting portion to the door body; and / or,

[0015] The first hinge seat further includes a first mounting portion, which is integrally formed with the first hinge portion; the second mounting portion and the second hinge portion are also integrally formed; and / or...

[0016] The first hinge seat further includes a first mounting portion, on which a first reinforcing rib is provided, and a second mounting portion is provided with a second reinforcing rib; and / or

[0017] The hinge also includes a second limiting structure, which includes a first limiting protrusion and a first limiting groove. The first limiting protrusion is located on the side of the first mounting part near the second hinge part, and the first limiting groove is located on the side of the second mounting part near the first hinge part. When the door of the opening and closing device is at its maximum opening and closing angle, the limiting protrusion is at least partially engaged and pressed into the limiting groove.

[0018] According to a second aspect of this disclosure, an opening and closing device is provided, comprising:

[0019] The opening and closing body has an installation cavity recessed into its interior on its outer side wall.

[0020] The door body is connected to the opening and closing body in an openable and closable manner via a hinge as described in any of the embodiments of this disclosure. A first hinge seat is connected to the side wall of the door body. A second hinge portion is at least partially located in the mounting cavity. A second mounting portion is installed and embedded in the mounting cavity. A through hole is provided on the front side wall of the mounting cavity. An elastic portion cooperates with the through hole to fix the second mounting portion. Alternatively, a fastener passes through the mounting hole and the through hole to fix the second mounting portion to the opening and closing body.

[0021] In some of the disclosed embodiments, the mounting cavity includes a first sidewall and a second sidewall located on both sides, the second sidewall being disposed near the first hinge portion, and at least a portion of the first sidewall and the second sidewall being disposed inclined relative to the vertical direction.

[0022] The second hinge seat has a first wedge-shaped portion and a second wedge-shaped portion on both sides. The first wedge-shaped portion is fitted to the first sidewall, and the second wedge-shaped portion is fitted to the second sidewall; and / or

[0023] The mounting cavity is also provided with a first clearance part, which is located between the bottom of the mounting cavity and the front side wall. The bottom end of the second mounting part is provided with a third wedge-shaped part, which fits and is assembled with the first clearance part.

[0024] The technical solution of this disclosure embodiment can achieve the following beneficial effects: In this hinge, the second mounting part is used to install and embed in the mounting cavity of the main body of the opening and closing device. When the opening and closing device opens the door, the mounting cavity can limit the second hinge seat through the second mounting part, so that the hinge will not tilt backward after being subjected to force, thereby achieving the anti-tilting effect. The fastener can further improve the fixing reliability of the second mounting part. Attached Figure Description

[0025] Figure 1 Hinge illustration of an embodiment of this disclosure Figure 1 ;

[0026] Figure 2 Hinge illustration of an embodiment of this disclosure Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the hinge explosion structure according to an embodiment of the present disclosure. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the hinge explosion structure according to an embodiment of the present disclosure. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the second hinge seat according to an embodiment of the present disclosure. Figure 1 ;

[0030] Figure 6 This is a schematic diagram of the second hinge seat according to an embodiment of the present disclosure. Figure 2 ;

[0031] Figure 7 This is a schematic diagram of the second hinge seat according to an embodiment of the present disclosure. Figure 3 ;

[0032] Figure 8 This is a schematic diagram of the first hinge seat according to an embodiment of the present disclosure;

[0033] Figure 9 This is a schematic diagram of a piston according to an embodiment of the present disclosure. Figure 1 ;

[0034] Figure 10 This is a schematic diagram of a piston according to an embodiment of the present disclosure. Figure 2 ;

[0035] Figure 11 This is a schematic diagram of the opening and closing body of an embodiment of the present disclosure. Figure 1 ;

[0036] Figure 12 This is a schematic diagram of the opening and closing body of an embodiment of the present disclosure. Figure 2 ;

[0037] Figure 13 This is a schematic diagram of the opening and closing body of an embodiment of the present disclosure. Figure 3 . Detailed Implementation

[0038] The contents of this disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figures 1 to 7 As shown, this disclosure provides a hinge, including a first hinge base 10 and a second hinge base 20. The first hinge base 10 includes a first hinge portion 11. The second hinge base 20 includes a second hinge portion 21 and a second mounting portion 22. The second hinge portion 21 is rotatably connected to the first hinge portion 11, so that the first hinge portion 11 and the second hinge portion 21 can rotate relative to each other to meet the opening and closing requirements of the opening and closing device at different angles.

[0040] Reference Figure 1 , Figure 3 , Figure 5As shown, the second mounting part 22 is used to install in the mounting cavity of the opening and closing body. The front side of the second mounting part 22 has at least one groove S. The second hinge seat 20 also has an elastic part 23 corresponding to the groove S. The elastic part 23 includes a fixed end 231 and a free end 232. The free end 231 is positioned away from the second hinge part 21 relative to the fixed end 232, and is located below the fixed end. When the free end 232 protrudes from the groove S, the portion of the free end 232 protruding from the groove S engages and is fixed with the opening and closing body 200, thereby achieving initial fixation between the second mounting part 22 and the opening and closing body 200. This engagement and fixing method is simple to operate and allows for quick positioning and installation. When it is necessary to disassemble the second hinge part 21 to disconnect the connection, the free end 232 can be elastically retracted into the groove S to disconnect from the opening and closing body 200, thus facilitating disassembly and maintenance of the equipment.

[0041] For example, in the initial state, the elastic part 23 is not under any pressure on the second mounting part 22, and the free end of the elastic part 23 is not compressed, with the free end 232 at least partially protruding from the front of the second mounting part 22. When the second mounting part 22 is inserted into the mounting cavity, the free end of the elastic part is compressed and retracts into the receiving groove along the direction close to the groove S. When the second mounting part 22 is installed in place, the elastic part loses pressure and returns to its initial state, allowing the free end 232 to be engaged in the through hole of the mounting cavity, thereby securing the second mounting part 22. This configuration further improves the stability and reliability of the fixation of the second mounting part 22.

[0042] Reference Figure 1 As shown, exemplarily, while the front side of the second mounting part 22 is provided with an elastic part 23, fasteners can also be provided to fix the second mounting part 22. For example, the second mounting part 22 is provided with a mounting hole 24, and the opening and closing body is provided with a mating hole corresponding to the mounting hole 24. The second mounting part 22 is assembled with the mounting hole and the mating hole by fasteners to fix the second mounting part 22 to the opening and closing body. This method can further enhance the stability of the connection between the second mounting part 22 and the opening and closing body 200.

[0043] It should be noted that the second mounting part 22 can be fixed by providing an elastic part 23 on the front side of the second mounting part 22, or the second mounting part 22 can be provided with a mounting hole 24, and the opening and closing body can be provided with a mating hole corresponding to the mounting hole. The second mounting part 22 can be assembled with the mounting hole and the mating hole by fasteners so that the second mounting part 22 is fixed to the opening and closing body.

[0044] Reference Figure 1As shown, exemplarily, the front of the second mounting portion 22 is provided with a number of grooves equal to the number of elastic portions 23, and the shape of the grooves matches that of the elastic portions. The elastic portions 23 are square plates, and the grooves are square slots. The specific shape of the grooves can be set according to actual usage requirements.

[0045] The hinge installation process is as follows: The first hinge seat 10 is fixed to the side wall of the door body using screws through the first mounting hole on the first mounting part 12. Then, the second mounting part 22 of the second hinge seat 20 is aligned with the mounting cavity on the outer side wall of the opening and closing body 200. Since the free end 232 of the elastic part 23 on the front side of the second mounting part 22 protrudes from the groove in its natural state, when the second mounting part 22 is pushed into the mounting cavity, the wedge-shaped part of the elastic part 23 first contacts the through hole on the front side wall of the mounting cavity. With the action of the pushing force, the wedge-shaped part is forced to elastically retract the elastic part 23 into the groove S. When the elastic part 23 reaches the position of the through hole, the free end 232 of the elastic part 23 protrudes from the groove S again, opening and closing with the through hole, thus achieving the initial fixation of the second mounting part 22 and the opening and closing body 200. If it is necessary to further enhance the fixation reliability, fasteners can be passed through the mounting holes on the second mounting part 22 and the fixing holes on the mounting wall to firmly fix the second mounting part and the opening and closing body 200.

[0046] The hinge of this embodiment has an elastic part 23 provided in front of the second mounting part 22. The elastic part 23 can engage with the through hole of the mounting cavity. The free end 232 of the elastic part 23 is disposed away from the second hinge part 21 relative to the fixed end 231. The second mounting part 22 is engaged and fixed in the mounting cavity of the opening and closing body 200, and / or fixed by fasteners such as screws, which improves the reliability of the second mounting part 22. The mounting cavity can also limit the second mounting part 22 through the side wall cooperation, so that the hinge does not tilt backward after being subjected to force, and prevents backward tilting, which can also improve the stability and reliability of the hinge.

[0047] Reference Figure 1 , Figure 5 and Figure 6 As shown, exemplarily, there are two grooves S, which are spaced apart along the length of the second mounting portion 22, and each groove S is provided with an elastic portion 23. This arrangement allows the second mounting portion 22 to engage and be fixed with the opening and closing body 200 at multiple positions, further improving the stability and reliability of the installation of the second mounting portion 22. By providing two grooves S and elastic portions 23 corresponding to the grooves S, the elastic portions 23 engage and are fixed with the through holes on the opening and closing body 200, thus ensuring the stability and reliability of the fixation of the second mounting portion 22.

[0048] Reference Figure 6As shown, exemplarily, the second mounting portion 22 includes a central portion 221 located between the two grooves S and edge portions 222 located on both sides of the two grooves S, with the mounting hole 24 located in the central portion 221. When fixed with fasteners, this arrangement allows the second mounting portion 22 to experience more even force within the mounting cavity, thereby improving overall installation stability.

[0049] Reference Figure 6 As shown, in some disclosed embodiments, the second mounting portion 22 includes a middle portion 221 located between the two grooves S and edge portions 222 located on both sides of the two grooves S, with through holes 223 provided on the edge portions 222. Exemplarily, the through holes 223 are oblong holes. The through holes provided in the edge portions 222 can reduce the weight of the second mounting portion 22, and in some cases, such as when it is necessary to connect to other components by means of bolts passing through the through holes, it can increase the versatility and flexibility of connections.

[0050] For example, the first hinge seat 10 is a rotating seat, and the second hinge seat 20 is a fixed seat. The hinge can be connected between the door body and the opening / closing body 200, allowing the door body and the opening / closing body 200 to be hinged. For instance, the first hinge seat 10 can be connected to the side wall of the door body and rotate with the door body. The second hinge seat 20 is connected to the opening / closing body 200 via the second mounting portion 22. When the door body and the opening / closing body 200 are closed, the first hinge portion 11 and the second hinge portion 21 can be considered to be on the same plane. The first hinge seat 10 can reciprocate relative to the second hinge seat 20 within a preset angle range, allowing the hinge to switch between a first position and a second position. During assembly, the first position of the hinge can correspond to the closed state of the door body and the state with a small opening angle, while the second position can correspond to the maximum opening state of the door body and the state with a large opening angle.

[0051] The second mounting part 22 is embedded in the mounting cavity of the opening and closing body 200. The second mounting part 22 can be spaced a certain distance from the inner sidewall of the mounting cavity or can be in close contact with the inner sidewall of the mounting cavity. In the front-rear direction of the opening and closing body 200, the second mounting part 22 can be limited by the inner sidewall of the mounting cavity, and the second mounting part 22 can also be limited by the bottom of the mounting cavity. Moreover, fasteners can fix the second mounting part 22 to the rear sidewall of the mounting cavity, which prevents the hinge from tilting backward under force, thereby improving the reliability of the hinge and preventing the hinge from loosening after long-term use.

[0052] Reference Figure 5 and Figure 6As shown, in some of the disclosed embodiments, the elastic part 23 includes a flat part 233 and a wedge-shaped part 234. The connection end of the wedge-shaped part 234 and the flat part 233 forms a step, and the wedge-shaped part 234 is disposed away from the second hinge part 22 relative to the flat part 233. This stepped structural design allows the elastic part 23 to better withstand the force when engaged with the opening and closing body 200, and it is not easy to loosen.

[0053] The thickness of the wedge-shaped portion 234 and the flat plate portion 233 are not the same, so that the outer side of the wedge-shaped portion 234 protrudes from the flat plate portion 233. The wedge-shaped portion 234 includes a planar positioning surface, which can cooperate with the inner wall of the mounting cavity to facilitate the insertion of the second mounting portion 22. An inclined surface is formed between the positioning surface and the bottom surface of the wedge-shaped portion.

[0054] Reference Figure 5 and Figure 6 As shown, in some of the disclosed embodiments, the thickness of the wedge-shaped portion 234 gradually increases from the end of the wedge-shaped portion 234 away from the flat plate portion 233 to the end of the wedge-shaped portion 234 closer to the flat plate portion 233. This wedge-shaped structure design makes it easier to insert the wedge-shaped portion 234 when the second mounting portion 22 is installed into the mounting cavity of the opening and closing body 200, and the engagement effect is better as the insertion depth increases.

[0055] Reference Figure 5 and Figure 6 As shown, the thickness of the second mounting portion 22 is less than the diameter of the second hinge portion 21. The back of the second mounting portion 22 and the back of the second hinge portion 21 can both abut against the inner wall of the opening and closing body 200, which can further improve the reliability of fixing the second hinge seat 20.

[0056] The thickness of the second mounting portion 22 can gradually increase from the end of the second mounting portion 22 away from the second hinge portion 21 to the end of the second mounting portion 22 closer to the second hinge portion 21. The cross-section of the second mounting portion 22 can also be approximately a right-angled trapezoid, so that the mounting cavity fits the second mounting portion 22, and there is a gap between the bottom surface of the second mounting portion 22 and the mounting cavity, which can ensure a tighter insertion fit of the second mounting portion 22.

[0057] Reference Figure 7As shown, in one specific embodiment, the mounting hole 24 is a screw hole, allowing a screw to be directly passed through the screw hole to fix the second mounting part 22 to the opening and closing body 200. Alternatively, the mounting hole 24 includes a first hole segment and a second hole segment arranged coaxially, with the first hole segment positioned relative to the second hole segment closer to the front side of the second mounting part. The second hole segment is at least partially threaded, and the mating hole is also threaded. For example, the first hole segment may be a smooth hole, with a diameter larger than that of the second hole segment. The mating hole is located on the front side of the opening frame portion of the opening and closing body, and may have a threaded hole segment or be a threaded hole. A bolt can pass through the mating hole, the first hole segment, and then be threadedly connected to the second hole segment. The second hole segment can be formed by setting a nut inside the hole.

[0058] This design allows for different application scenarios, enabling users to choose between using screws alone for fixing or using screws in conjunction with nuts for fixing, thus increasing the flexibility of the fixing method.

[0059] Reference Figure 8 As shown, in one specific embodiment, the first hinge seat 10 further includes a first mounting part 12, on which a first mounting hole 13 is provided. The first mounting hole 13 is used to cooperate with a fastener to fix the first mounting part 12 to the door body, thereby realizing a stable connection between the first hinge seat 10 and the door body.

[0060] In some disclosed embodiments, there is one groove and one mounting hole, with an elastic portion corresponding to the groove, and the elastic portion and mounting hole are spaced apart. Exemplarily, the groove and mounting hole are respectively located near the two side edges of the second mounting part. The second mounting part is fixed by the elastic portion and screws, ensuring reliable fixing of the second mounting part and preventing it from immediately dislodging after the screws are removed. A square groove is provided between the groove and the mounting hole, and an oblong hole is provided on the outer edge of both the groove and the mounting hole.

[0061] For example, the first hinge seat 10 can be connected to the side wall of the door through the first mounting part 12 and rotate with the door. When the door and the opening and closing body 200 are closed, the first hinge part 11 and the second hinge part 21 can be regarded as being on the same plane.

[0062] For example, there can be multiple first mounting holes 13, such as three. The number, shape, and size of the first mounting holes 13 can be set according to actual usage requirements.

[0063] The first hinge portion 11 and the second hinge portion 21 are arranged on the same central axis. The first hinge portion 11 and the second hinge portion 21 can be rotatably connected by a connecting shaft. The first mounting portion 12 and the second mounting portion 22 are located on both sides of the central axis.

[0064] In one embodiment, the first mounting portion 12 and the first hinge portion 11 are integrally formed, and the second mounting portion 12 and the second hinge portion 11 are also integrally formed. This integral forming design reduces gaps between components, improves the strength and stability of the overall structure, and also facilitates manufacturing. For example, the first hinge portion 11 and the first mounting portion 12, the second hinge portion 21 and the second mounting portion 22 can be injection molded into an integral structure.

[0065] For example, the first mounting part 12 is provided with a first reinforcing rib, and the second mounting part 22 is provided with a second reinforcing rib. This arrangement can further enhance the structural strength. The arrangement of the first and second reinforcing ribs can significantly improve the strength of the first and second mounting parts without adding too much weight, so that they can better withstand various forces during use.

[0066] Reference Figure 1 and Figure 2 As shown, in one disclosed embodiment, the hinge further includes a second limiting structure 30. The second limiting structure 30 includes a first limiting protrusion 31 and a first limiting groove 32. The first limiting protrusion 31 is disposed on the side of the first mounting portion 12 near the second hinge portion 21, and the first limiting groove 32 is disposed on the side of the second mounting portion 22 near the first hinge portion 11. When the door of the opening and closing device is at its maximum opening and closing angle, the limiting protrusion is at least partially engaged and pressed into the limiting groove. This limiting structure can effectively prevent the door from being over-opened and closed, protect the hinge and other components of the opening and closing device from damage, and also provide the user with clear feedback on the opening and closing angle.

[0067] For example, the first limiting protrusion 31 can be a block structure, which ensures that the hinge does not fail within a certain range of opening force, while the hinge may fail if the opening force exceeds a certain range. For instance, if the design requires that the hinge not fail when the door is pushed with a force of 0-80N, the first limiting protrusion 31 and the first limiting groove 32 are used to achieve the limiting. However, if the design requires that the hinge may fail when the door is pushed with a force exceeding 80N, it may not break or shatter.

[0068] Reference Figure 3 and Figure 4As shown, in one disclosed embodiment, the hinge further includes a piston 40, an elastic element 50, and a connecting shaft 60. The first hinge portion 11 has a first mating structure 113, and the second hinge portion 21 is provided with a second receiving cavity 211 and a second opening 212. The piston 40 is disposed within the second receiving cavity 211, and the piston 40 has a second mating structure 41. The second mating structure 41 abuts against the first mating structure 113 through the second opening 212, and the first hinge seat 10 and the second hinge seat 20 are capable of reciprocating relative to each other in the abutting state. The elastic element 50 is disposed within the second receiving cavity 211 and located at the end of the piston 40 opposite to the second mating structure 41. The elastic element 50 provides assistance in the abutting state. The connecting shaft 60 passes through the first hinge portion 11, the piston 40, the elastic element 50, and the second hinge portion 21, so that the first hinge portion 11 and the second hinge portion 21 are fixed relative to each other axially.

[0069] Reference Figure 8 As shown, the first hinge portion 11 is provided with a first receiving cavity 111, the first receiving cavity 111 is provided with a first opening 112, the first opening 112 is opposite to and communicates with the second opening 212, and a first mating structure is provided in the first receiving cavity 111. One end of the first hinge portion 11 with the first opening 112 is connected to one end of the second hinge portion 21 with the second opening 212.

[0070] Reference Figure 8 and Figure 9 As shown, exemplarily, a first limiting structure 80 is provided between the abutting surfaces of the first mating structure 113 and the second mating structure 41. The first limiting structure 80 includes a first limiting portion 81 located on the first mating structure 113 and a second limiting portion 82 located on the second mating structure 41. When the hinge is in its initial state, the first limiting portion 81 and the second limiting portion 82 are engaged in a limiting fit. When the hinge is in its initial state, the engagement of the first limiting portion 81 and the second limiting portion 82 positions the hinge in its initial state, thus preventing changes in the initial state of the hinge due to transportation or other external forces.

[0071] Reference Figure 8 and Figure 9 As shown, in one disclosed embodiment, the second mating structure 41 includes a first helical surface 42 and a first top surface 43, and the first mating structure 113 includes a first mating surface 114 and a second top surface 115. One end of the first top surface 43 is connected to the top end of the first helical surface 42. The first helical surface 42 and the first mating surface 114 mate with each other, and the first top surface 43 and the second top surface 115 correspond to each other. A first limiting part 81 is disposed on the second top surface 115, and a second limiting part 82 is disposed on the first top surface 43. When the hinge is in the open state, the first helical surface 42 and the first mating surface 114 abut against each other.

[0072] Reference Figure 8 and Figure 9 As shown, in one disclosed embodiment, the sidewall of the piston 40 is provided with an axially extending guide groove 44, and the sidewall of the second receiving cavity 211 is provided with a corresponding guide protrusion 213. The guide protrusion 213 is disposed within the guide groove 44. When the opening and closing device is at the maximum opening angle, the guide protrusion 213 abuts against the guide groove, which can help limit the maximum opening angle.

[0073] Reference Figure 3 and Figure 4 As shown, in one disclosed embodiment, the hinge further includes fasteners connected to both ends of the connecting shaft 60 to fix the first hinge seat 10 and the second hinge seat 20 axially relative to each other. The hinge also includes a washer 70 with a non-circular hole 71 at its center. The end of the connecting shaft 60 passes through the non-circular hole 71 and is riveted to the washer 70. Alternatively, the washer 70 may have a polygonal hole at its center, which is also passed through and riveted to the washer. For example, the polygonal hole of the washer 70 may be a regular hexagon. This arrangement ensures the relative fixation of the washer 70 and the connecting shaft 60 when they are riveted, providing a limiting effect and preventing damage. Because the continuous friction caused by the relative rotation of the connecting shaft 60 and the washer 70 may lead to strength problems, such as wearing down the riveted part, thus affecting the hinge's strength, this embodiment avoids damage by using a polygonal hole instead of a circular one.

[0074] Reference Figure 10 As shown, the piston 40 is provided with weight-reducing holes 45. There can be one or more weight-reducing holes 45, which are spaced circumferentially along the central axis of the piston 40. This arrangement reduces the weight of the piston 40 and the hinge, and avoids injection molding defects that occur when the piston 40 is solidly injection molded.

[0075] Reference Figure 10 As shown, a first positioning protrusion 46 is provided at the bottom end of the piston 40 along the center, and the first positioning protrusion 46 is used to position the elastic member 50. A second positioning protrusion 214 is provided at the bottom end of the second receiving cavity 211 along the center, and the second positioning protrusion 214 is used to position the elastic member 50.

[0076] Reference Figure 1 , Figures 11-13As shown, this disclosure provides an opening and closing device, which includes an opening and closing body 200 and a door body. The outer wall of the opening and closing body 200 is provided with a mounting cavity 201 recessed into the opening and closing body 200. The door body is connected to the opening and closing body 200 in an openable and closable manner via a hinge as described in the embodiments of this disclosure. A first hinge seat 10 is connected to the side wall of the door body, and a second hinge portion 20 is at least partially located within the mounting cavity. A second mounting portion 22 is installed and embedded in the mounting cavity 201. The front side wall of the mounting cavity 201 is provided with a first through hole 203. An elastic portion cooperates with the first through hole 203 to fix the second mounting portion 22; alternatively, fasteners pass through the mounting hole 24 and the second through hole to fix the second mounting portion 22 to the opening and closing body 200.

[0077] In the opening and closing device of this embodiment, the second mounting portion 22 of the second hinge seat 20 engages with the front sidewall of the mounting cavity via an elastic portion, thereby fixing the second mounting portion 22 in the mounting cavity of the opening and closing body 200. Furthermore, the second mounting portion 22 can be fixed to the opening and closing body 200 by fasteners passing through mounting holes. This arrangement improves the reliability of the second mounting portion's fixation.

[0078] Reference Figures 11-13 As shown, in one disclosed embodiment, the mounting cavity 201 includes a first sidewall 201a and a second sidewall 201b located on both sides. The second sidewall 201a is disposed near the first hinge portion, and at least a portion of the first sidewall 201a and the second sidewall 201b are disposed inclined relative to the vertical direction.

[0079] Reference Figure 6 and Figure 7 As shown, the second hinge seat 20 has a first wedge-shaped portion 25 and a second wedge-shaped portion 26 on both sides. The first wedge-shaped portion 25 is fitted to the first side wall 201a, and the second wedge-shaped portion 26 is fitted to the second side wall 201b. This wedge-shaped fit design makes the installation of the second hinge seat in the mounting cavity more tight and stable, enhancing the structural stability of the entire opening and closing device.

[0080] The first sidewall 201a and the second sidewall 201b of the mounting cavity in this embodiment are inclined and cooperate with the first wedge portion 25 and the second wedge portion 26 respectively, thereby increasing the strength by adding two force points between the device body and the second mounting portion.

[0081] Reference Figure 6 and Figure 12As shown, exemplarily, a first clearance portion 202 is also provided within the mounting cavity 201. The first clearance portion 202 is located between the bottom of the mounting cavity 201 and the front sidewall. A third wedge-shaped portion 27 is provided at the bottom end of the second mounting portion 22, and the third wedge-shaped portion 27 is fitted and assembled with the first clearance portion 202. This arrangement further optimizes the mounting structure of the second mounting portion within the mounting cavity, making the fit between the second mounting portion and the mounting cavity more precise, improving the overall installation effect and equipment performance, and further increasing the overall strength.

[0082] When the user opens the door of the opening and closing device, the first hinge portion of the first hinge seat and the second hinge portion of the second hinge seat rotate relative to each other, and the door gradually opens. When the door is opened to the maximum opening angle, the first limiting protrusion at least partially engages and presses into the first limiting groove, playing a limiting role and preventing the door from being over-opened. When the user closes the door, the door is rotated in the opposite direction, and the first hinge portion and the second hinge portion rotate relative to each other in opposite directions until the door is closed. Throughout the entire use process, due to the second mounting portion being fixed in the mounting cavity by elastic parts and / or fasteners, and the wedge-shaped fit between the mounting cavity and the second hinge seat, the opening and closing device is structurally stable and reliable in use during the opening and closing process.

[0083] 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 hinge, characterized in that, include The first hinge seat includes a first hinge portion; The second hinge seat includes a second hinge portion and a second mounting portion. The second hinge portion is rotatably connected to the first hinge portion. The second mounting portion is used to be installed in the mounting cavity of the opening and closing body. The front side of the second mounting portion is provided with at least one groove along the height direction. The second hinge seat is also provided with an elastic portion corresponding to the groove. The elastic portion includes a fixed end and a free end. The free end is disposed away from the second hinge portion relative to the fixed end. When the free end protrudes from the groove, the part of the free end protruding from the groove is engaged and fixed with the opening and closing body. The free end elastically retracts close to the groove to disengage from the opening and closing body. And / or, the second mounting part is provided with a mounting hole, and the opening and closing body is provided with a mating hole corresponding to the mounting hole. The second mounting part is assembled with the mounting hole and the mating hole by fasteners so as to fix the second mounting part to the opening and closing body.

2. The hinge according to claim 1, characterized in that, The number of grooves is two, and the two grooves are arranged at intervals along the length direction of the second mounting part. Each of the two grooves is provided with an elastic part.

3. The hinge according to claim 2, characterized in that, The second mounting portion includes a middle portion located between the two grooves and edge portions located on both sides of the two grooves, and the mounting hole is located in the middle portion.

4. The hinge according to claim 2, characterized in that, The second mounting portion includes a middle portion located between the two grooves and an edge portion located on both sides of the two grooves, and the edge portion is provided with a through hole.

5. The hinge according to claim 1, characterized in that, The elastic part includes a flat plate part and a wedge-shaped part. The connection end between the wedge-shaped part and the flat plate part forms a step shape. The wedge-shaped part is disposed away from the second hinge part relative to the flat plate part. One end of the flat plate part is connected to the top of the groove to form the fixed end. The other end of the flat plate part is connected to the wedge-shaped part, and the wedge-shaped part forms the free end.

6. The hinge according to claim 5, characterized in that, The thickness of the wedge gradually increases from the end of the wedge away from the flat plate to the end of the wedge closer to the flat plate; and / or, the groove extends through the bottom of the second mounting portion; and / or, the wedge protrudes from the front of the second mounting portion, the wedge including a planar positioning surface, and an inclined surface is formed between the positioning surface and the bottom surface of the wedge.

7. The hinge according to claim 1, characterized in that, The mounting hole is a screw hole; or, the mounting hole includes a first hole section and a second hole section arranged coaxially, the first hole section being disposed relative to the second hole section and close to the front side of the second mounting part, the second hole section being at least partially provided with threads, and the mating hole being provided with threads.

8. The hinge according to claim 1, characterized in that, The number of the groove and the mounting hole is one, and the groove is provided with an elastic part. The elastic part and the mounting hole are spaced apart.

9. The hinge according to claim 1, characterized in that, The first hinge seat further includes a first mounting portion, which has a first mounting hole for engaging with a fastener to fix the first mounting portion to the door body; and / or, The first hinge seat further includes a first mounting portion, which is integrally formed with the first hinge portion; the second mounting portion and the second hinge portion are integrally formed; and / or, The first hinge seat further includes a first mounting portion, on which a first reinforcing rib is provided, and a second mounting portion is provided with a second reinforcing rib; and / or The hinge also includes a second limiting structure, which includes a first limiting protrusion and a first limiting groove. The first limiting protrusion is disposed on the side of the first mounting part near the second hinge part, and the first limiting groove is disposed on the side of the second mounting part near the first hinge part. When the door of the opening and closing device is at its maximum opening and closing angle, the limiting protrusion is at least partially engaged and pressed into the limiting groove.

10. An opening and closing device, characterized in that, The opening and closing device includes: The opening and closing body has an installation cavity recessed into its interior on its outer side wall. A door body, which is closably connected to the opening and closing body via a hinge as described in any one of claims 1 to 9, wherein the first hinge seat is connected to the side wall of the door body, the second hinge portion is at least partially located within the mounting cavity, the second mounting portion is installed and embedded in the mounting cavity, the front side wall of the mounting cavity is provided with a through hole, the elastic portion cooperates with the through hole to fix the second mounting portion, or the fastener passes through the mounting hole and the through hole to fix the second mounting portion to the opening and closing body.

11. The opening and closing device according to claim 10, characterized in that, The mounting cavity includes a first sidewall and a second sidewall located on both sides. The second sidewall is disposed near the first hinge portion, and at least a portion of the first sidewall and the second sidewall are inclined relative to the vertical direction. The second hinge seat has a first wedge-shaped portion and a second wedge-shaped portion on both sides. The first wedge-shaped portion is fitted to the first sidewall, and the second wedge-shaped portion is fitted to the second sidewall; and / or The mounting cavity is further provided with a first clearance portion, which is located between the bottom of the mounting cavity and the front sidewall. The bottom end of the second mounting portion is provided with a third wedge-shaped portion, which fits and is assembled with the first clearance portion.

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