Hinge mechanism and opening and closing equipment

Abstract

The utility model discloses a hinge mechanism and opening and closing equipment, the hinge mechanism comprises a first hinge seat, a second hinge seat and a limiting structure, the first hinge seat comprises a first hinge part and a first mounting part, the first mounting part is used for being connected with a rotatable panel, and the second hinge seat comprises a second hinge part and a second mounting part. The second mounting part is used for being connected with a fixing structure, the first hinge part and the second hinge part are rotatably connected through a connecting structure, the first hinge part can rotate relative to the axis of the second hinge part, the limiting structure comprises a limiting protrusion and a limiting groove, the limiting protrusion is arranged on the first side edge, and the limiting groove is formed in the first surface; the first side edge is the side, close to the second hinge seat, of the first mounting part, the first surface is the surface, away from the fixing structure, of the second mounting part, and when the rotatable panel is located at the maximum opening and closing angle, at least part of the limiting protrusion is clamped and pressed into the limiting groove. The reliability and strength of the hinge mechanism can be improved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of hinges, and in particular, to a hinge mechanism and an opening / closing device. Background Art

[0002] A hinge mechanism can be installed on a door body to achieve the opening and closing of the door body. Exemplarily, the hinge mechanism can include a fixed seat connected to a cabinet body, a rotating seat connected to the door body, and a core shaft passing through the fixed seat and the rotating seat. The hinge mechanism can also include an elastic member. Due to reasons such as the thrust force for opening the door, the elastic force of the elastic member, and inertia, a very large torque will be formed, causing the rotating seat to be subjected to a large force when rotating. Since the rotating seat and the fixed seat are fixed together by the core shaft, this force will drive the rotating seat to tilt backward and rotate.

[0003] In the related art, when the rotating seat is at the maximum opening / closing angle, the rotating seat will exert a pulling force on the fixed seat in a direction perpendicular to the axis of the fixed seat, which may cause the fixed seat to be damaged by the force, thereby reducing the reliability of the hinge mechanism. Summary of the Utility Model

[0004] Embodiments of the present disclosure provide a hinge mechanism and an opening / closing device to solve or alleviate one or more technical problems in the prior art:

[0005] As a first aspect of the embodiments of the present disclosure, a hinge mechanism is provided, including:

[0006] A first hinge seat, including a first hinge portion and a first mounting portion, the first mounting portion being used for connecting with a rotatable panel of the opening / closing device; a second hinge seat, including a second hinge portion and a second mounting portion, the second mounting portion being used for connecting with a fixed structure of the opening / closing device, the first hinge portion and the second hinge portion being rotatably connected through a connecting structure, and the first hinge portion being able to rotate relative to the axis of the second hinge portion;

[0007] A limiting structure, including a limiting protrusion and a limiting groove, the limiting protrusion being arranged on a first side, the limiting groove being arranged on a first surface, the first side being the side of the first mounting portion close to the second hinge seat, the first surface being the surface of the second mounting portion facing away from the fixed structure, when the rotatable panel of the opening / closing device is at the maximum opening / closing angle, at least a part of the limiting protrusion is clamped and pressed into the limiting groove.

[0008] In some possible implementation manners, a plurality of first reinforcing ribs are arranged on the side of the first mounting portion facing away from the rotatable panel, the first reinforcing ribs extending along a direction perpendicular to the axis of the first hinge portion, one end of the limiting protrusion is connected to the first reinforcing rib and is located on the first side, a plurality of second reinforcing ribs are arranged on the first surface of the second mounting portion, the second reinforcing ribs extending along a direction perpendicular to the axis of the second hinge portion, and the limiting groove is located on the second reinforcing rib.

[0009] In some possible implementations, the limiting groove passes through both sides of the second reinforcement rib along the axial direction of the second hinge part, and the limiting groove includes a bottom surface, a first side surface and a second side surface. The first side surface and the second side surface are arranged opposite to each other, and the first side surface is a side close to the second hinge part. The angle between the first side surface and the bottom surface is greater than the angle between the second side surface and the bottom surface, and the first side surface and the bottom surface are arranged in an arc shape.

[0010] In some possible implementations, the limiting protrusion includes a first protrusion portion, the first protrusion portion is adapted to the limiting groove, the first protrusion portion includes a first end face and a second end face, the first end face is the surface of the first protrusion close to the first hinge portion, the second end face is the surface of the first protrusion away from the rotatable panel, the first end face is arranged in an arc shape, and the second end face is fitted with the second side plane.

[0011] In some possible implementations, the materials of the first hinge seat and the second hinge seat both include polyoxymethylene resin material.

[0012] In some possible implementations, the limiting protrusion also includes a second protrusion portion, one end of which is connected to the first protrusion portion, and a step portion is formed between the second protrusion portion and the first protrusion portion. When the first protrusion portion is engaged with the limiting groove, the second protrusion portion overlaps the first surface.

[0013] In some possible implementations, the limiting protrusion and the limiting groove are interference fit.

[0014] In some possible implementations, the connection structure includes:

[0015] The piston, the first hinged part has a first matching structure, the second hinged part is provided with a second accommodating cavity and a second opening, the piston is arranged in the second accommodating cavity, the piston has a second matching structure, and the second matching structure abuts against the first matching structure through the second opening;

[0016] An elastic member is disposed in the second accommodating cavity and is located at an end of the piston away from the second matching structure;

[0017] A connecting shaft is provided 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 in the axial direction.

[0018] In some possible implementations, the second matching structure includes a first helical surface, the first matching structure includes a first matching surface corresponding to the first helical surface, the second matching structure also 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 matching structure also includes a second matching surface connected to the first matching surface, and the second matching surface has a helical direction opposite to that of the first matching surface;

[0019] When the opening and closing device is in the open state, the first mating surface abuts against the first helical surface. When the opening and closing device is in the closed state, the second mating surface abuts against the second helical surface, and the first mating surface abuts against the third helical surface.

[0020] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an opening and closing device, including:

[0021] A box body having an opening;

[0022] A door body, which is hinged to the opening of the box body through the hinge mechanism of any embodiment of the present disclosure.

[0023] The technical solution of the embodiments of the present disclosure can achieve the following beneficial effects: In the hinge mechanism of the embodiments of the present disclosure, the limiting protrusion is provided on the first side, and the limiting groove is provided on the first surface. The first side is the side of the first mounting portion close to the second hinge seat, and the first surface is the surface of the second mounting portion facing away from the fixed structure. When the rotatable panel is at the maximum opening and closing angle, at least part of the limiting protrusion is clamped and pressed in the limiting groove. With such a setting, the limiting protrusion generates a force perpendicular to the axis of the second hinge seat on the second mounting portion of the second hinge seat, thereby avoiding damage to the second hinge seat due to tensile force and improving the reliability and strength of the hinge mechanism.

[0024] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments in accordance with the present disclosure and should not be regarded as limiting the scope of the present disclosure.

[0026] Figure 1 Schematic diagram of the overall structure of the hinge mechanism of the embodiments of the present disclosure Figure 1 ;

[0027] Figure 2 Schematic diagram of the overall structure of the hinge mechanism of the embodiments of the present disclosure Figure 2 ;

[0028] Figure 3 Schematic diagram of the structure of the first hinge seat of the embodiments of the present disclosure Figure 1 ;

[0029] Figure 4 Schematic diagram of the structure of the first hinge seat of the embodiments of the present disclosureFigure 2 ;

[0030] Figure 5 Schematic diagram of the first hinge seat structure of the present disclosure embodiment Figure 3 ;

[0031] Figure 6 Enlarged schematic diagram of the limiting protrusion of the present disclosure embodiment;

[0032] Figure 7 Schematic diagram of the second hinge seat structure of the present disclosure embodiment;

[0033] Figure 8 Enlarged schematic diagram of the limiting groove of the present disclosure embodiment;

[0034] Figure 9 Exploded schematic diagram of the hinge mechanism of the present disclosure embodiment;

[0035] Figure 10 Cross-sectional schematic diagram of the hinge mechanism of the present disclosure embodiment.

[0036] Meanings of the reference numerals in the figure:

[0037] 1. First hinge seat; 2. Second hinge seat; 3. Limiting structure; 4. Connecting structure;

[0038] 11. First hinge portion; 12. First mounting portion; 121. First side; 13. First reinforcing rib;

[0039] 21. Second hinge portion; 22. Second mounting portion; 221. First surface; 23. Second reinforcing rib;

[0040] 31. Limiting protrusion; 32. Limiting groove; 311. First protrusion portion; 312. First end face; 313. Second end face; 314. Second protrusion portion; 321. Bottom surface; 322. First side surface; 323. Second side surface; 41. Piston; 42. Elastic member; 43. Connecting shaft. Detailed implementation manners

[0041] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and the description are regarded as being essentially exemplary rather than restrictive.

[0042] In the related art, a hinge mechanism includes a second hinge seat and a first hinge seat. The second hinge seat includes a second hinge portion and a second mounting portion, and the second mounting portion is used for connecting with a fixed structure of an opening and closing device. A protruding portion is provided on one side of the second hinge portion protruding towards the first hinge seat after installation. When the rotatable panel of the opening and closing device is at the maximum opening and closing angle, the first hinge seat rotates and presses on one end of the protruding portion close to the second hinge portion. When a force is applied to the rotatable panel again, the first hinge seat will apply a pressure perpendicular to the axis of the second hinge seat to the protruding portion, which will generate a relatively large tensile force on the second hinge portion of the second hinge seat, thereby possibly breaking the second hinge portion of the second hinge seat, reducing the reliability of the hinge mechanism, and increasing the probability and risk of the hinge mechanism malfunctioning.

[0043] Exemplarily, the protruding portion is subjected to a downward pressure, which will generate a relatively large tensile force on the second hinge portion of the second hinge seat, thereby breaking the cylindrical second hinge portion. The second hinge seat of the related art is prone to break at the horizontal line position where the second mounting portion and the second hinge portion are connected, resulting in the failure of the hinge mechanism.

[0044] To solve the problems existing in the limit structure of the hinge mechanism in the related art, an embodiment of the present disclosure provides a hinge mechanism. The hinge mechanism of the embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0045] Figure 1 Schematic diagram of the overall structure of the hinge mechanism according to the embodiment of the present disclosure Figure 1 ; Figure 2 Schematic diagram of the overall structure of the hinge mechanism according to the embodiment of the present disclosure Figure 2 ; Figure 3 Schematic diagram of the structure of the first hinge seat according to the embodiment of the present disclosure Figure 1 ; Figure 4 Schematic diagram of the structure of the first hinge seat according to the embodiment of the present disclosure Figure 2 ; Figure 5 Schematic diagram of the structure of the first hinge seat according to the embodiment of the present disclosure Figure 3 ; Figure 6 Enlarged schematic diagram of the limit protrusion according to the embodiment of the present disclosure; Figure 7 Schematic diagram of the structure of the second hinge seat according to the embodiment of the present disclosure; Figure 8 Enlarged schematic diagram of the limit groove according to the embodiment of the present disclosure;

[0046] Figure 9 Explosion schematic diagram of the hinge mechanism according to the embodiment of the present disclosure. Refer to Figures 1 to 9As shown in the figure, an embodiment of the present disclosure provides a hinge mechanism, including: a first hinge seat 1, a second hinge seat 2, and a limiting structure 3. Specifically, the first hinge seat 1 includes a first hinge portion 11 and a first mounting portion 12, and the first mounting portion 12 is used to connect with the rotatable panel of the opening and closing device. The second hinge seat 2 includes a second hinge portion 21 and a second mounting portion 22, and the second mounting portion is used to connect with the fixed structure of the opening and closing device. The first hinge portion 11 and the second hinge portion 21 are rotatably connected through a connecting structure 4, and the first hinge portion 11 can rotate relative to the axis of the second hinge portion 21. The limiting structure 3 includes a limiting protrusion 31 and a limiting groove 32. The limiting protrusion 31 is arranged on the first side 121, and the limiting groove 32 is arranged on the first surface 221. The first side 121 is the side of the first mounting portion 12 close to the second hinge seat 2. The first surface 221 is the surface of the second mounting portion 22 facing away from the fixed structure. When the rotatable panel of the opening and closing device is at the maximum opening and closing angle, at least part of the limiting protrusion 31 is clamped and pressed into the limiting groove 32.

[0047] Exemplarily, the opening and closing device can be a freezer, a door or window (such as a car door), or a folding furniture. For example, when the opening and closing device is a freezer, the first hinge seat 1 is a rotating seat, and the second hinge seat 2 is a fixed seat. The hinge mechanism can be connected between the door body and the box body of the freezer, so that the door body and the box body are hinged. At this time, the rotatable panel can be the door body of the freezer, and the fixed structure of the opening and closing device can be represented as the box body of the freezer.

[0048] Exemplarily, the first mounting portion 12 is used to connect with the rotatable panel of the opening and closing device, and the second mounting portion 22 is used to connect with the fixed structure of the opening and closing device. The first mounting portion 12 and the second mounting portion 22 can be made of metal or resin materials, and the specific materials of the first mounting portion 12 and the second mounting portion 22 can be set according to actual usage requirements. The shapes of the first mounting portion 12 and the second mounting portion 22 can be rectangular or circular, and the shapes of the first mounting portion 12 and the second mounting portion 22 can be set according to actual usage requirements. At least one first mounting hole K1 can be provided on the first mounting portion 12, and the first mounting hole K1 penetrates through the first mounting portion 12. A first screw can be connected to the door body through the first mounting hole K1. At least one second mounting hole K2 can be provided on the second mounting portion 22, and the second mounting hole K2 penetrates through the second mounting portion. A second screw can be connected to the box body through the second mounting hole K2.

[0049] In one embodiment, the first hinge seat 1 is connected to the side wall of the door body through the first mounting portion 12 and rotates with the door body. 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 is at the opening of the box body, that is, when the door body is closed, the first hinge portion 11 and the second hinge portion 21 can be regarded as being in the same plane.

[0050] As Figure 1 andFigure 2 As shown, exemplarily, the first hinge portion 11 is cylindrical, the second hinge portion 21 is cylindrical, the first hinge portion 11 and the second hinge portion 21 are coaxially arranged, and are rotatably connected by a connecting structure 4. The first hinge portion 11 can rotate relative to the axis of the second hinge portion 21.

[0051] Exemplarily, the hinge mechanism has a first posture and a second posture. The first hinge seat 1 can reciprocally rotate relative to the second hinge seat 2 within a preset angle range. When the hinge mechanism is assembled, the first posture of the hinge mechanism can correspond to the closed state of the door body of the opening and closing device and the state where the opening angle of the door body is relatively small, and the second posture of the hinge mechanism can correspond to the maximum opening state of the door body of the opening and closing device and the state where the opening angle of the door body is relatively large.

[0052] For the hinge mechanism of the related art, the protruding portion is subjected to a downward pressure, which will generate a relatively large pulling force on the second hinge portion of the second hinge seat, thereby breaking the cylindrical second hinge portion. The second hinge seat of the related art is prone to break at the horizontal line position where the second installation portion and the second joint portion are connected, resulting in the failure of the hinge mechanism. As Figure 1 In the hinge mechanism of the embodiment of the present disclosure shown, when the rotatable panel of the opening and closing device is at the maximum opening and closing angle, the limiting protrusion 31 is at least partially clamped and pressed in the limiting groove 32. The limiting protrusion 31 generates an inward pressure (perpendicular to the first surface of the second installation portion 22) on the second installation portion 22, thereby avoiding generating any acting force on the second hinge portion of the second hinge seat, and thus protecting the hinge mechanism from being damaged and broken.

[0053] The hinge mechanism of the embodiment of the present disclosure includes a first hinge seat 1, a second hinge seat 2, and a limiting structure 3. The first hinge seat 1 includes a first hinge portion 11 and a first installation portion 12. The second hinge seat 2 includes a second hinge portion 21 and a second installation portion 22. The first hinge portion 11 and the second hinge portion 21 are rotatably connected by a connecting structure 4, and the first hinge portion 11 can rotate relative to the axis of the second hinge portion 21. The limiting structure 3 includes a limiting protrusion 31 and a limiting groove 32. The limiting protrusion 31 is provided on the first side 121, and the limiting groove 32 is provided on the first surface 221. The first side 121 is the side of the first installation portion 12 close to the second hinge seat 2. The first surface 221 is the surface of the second installation portion 22 facing away from the fixed structure. When the rotatable panel of the opening and closing device is at the maximum opening and closing angle, the limiting protrusion 31 is at least partially clamped and pressed in the limiting groove 32. With such a setting, the limiting protrusion 31 generates a force perpendicular to the axis direction of the second hinge seat 2 on the second installation portion 22 of the second hinge seat 2, thereby avoiding damage to the second hinge seat 2 due to tensile force and improving the reliability and strength of the hinge mechanism.

[0054] Referring to Figure 4 、 Figure 5and Figure 7 As shown, in an exemplary embodiment, on the side of the first mounting portion 12 facing away from the rotatable panel, a plurality of first reinforcing ribs 13 are provided. The first reinforcing ribs 13 extend along a direction perpendicular to the axis of the first hinge portion 11. One end of the limiting protrusion 31 is connected to the first reinforcing rib 13 and is located on the first side 121. On the first surface 221 of the second mounting portion 22, a plurality of second reinforcing ribs 23 are provided. The second reinforcing ribs 23 extend along a direction perpendicular to the axis of the second hinge portion 21. The limiting groove 32 is located on the second reinforcing rib 23.

[0055] It should be noted that the specific structure of the first reinforcing rib 13 is not limited to Figure 4 and Figure 5 the strip shape shown. The first reinforcing rib 13 can also be understood as a reinforcing boss provided on the first mounting portion 12 or other structures that can cooperate with the limiting protrusion 31 and enhance the overall strength. The specific structure of the second reinforcing rib 23 is not limited to Figure 7 the strip shape shown. The second reinforcing rib 23 can also be understood as a reinforcing boss provided on the second mounting portion 22 or other structures that can cooperate with the limiting groove 32 and enhance the overall strength. The specific structures of the first reinforcing rib 13 and the second reinforcing rib 23 can be set according to actual usage requirements and are not limited herein.

[0056] Referring to Figure 4 and Figure 5 As shown, by way of example, one end of the first mounting portion 12 is connected to the first hinge portion 11. The first hinge portion 11 is cylindrical, and the first mounting portion 12 and the first hinge portion 11 are integrally formed. The first reinforcing rib 13 is provided on the side of the first mounting portion 12 facing away from the rotatable panel. The number of the first reinforcing ribs 13 can be set according to actual usage requirements. The first reinforcing rib 13 extends along a direction perpendicular to the axis of the first hinge portion 11 (the length direction of the first mounting portion 12). A plurality of first reinforcing ribs 13 are spaced apart. For example, the number of the first reinforcing ribs 13 is five, and the five first reinforcing ribs 13 are spaced apart. The sizes of the first reinforcing ribs can be the same or different. The first reinforcing rib 13 near the side of the first mounting portion 12 protrudes outward to form a limiting protrusion 31. The limiting protrusion 31 is located at one end of the first reinforcing rib 13 close to the first hinge portion 11. The first mounting holes are provided at the end away from the first hinge portion 11. The number of the first mounting holes is multiple. For example, the number of the first mounting holes is three. The first mounting holes can be provided between adjacent first reinforcing ribs 13, or the size of the middle first reinforcing rib 13 can be shortened to form an area for setting the first mounting holes.

[0057] Referring to Figure 7As shown, exemplarily, one end of the second mounting portion 22 is connected to the second hinge portion 21. The second hinge portion 21 is cylindrical, and the second mounting portion 22 and the second hinge portion 21 are integrally formed. The second reinforcing rib 23 is disposed on the first surface 221 of the second mounting portion 22, and the second reinforcing rib 23 extends along a direction perpendicular to the axis of the second hinge portion 21 (the length direction of the second mounting portion 22). A plurality of second reinforcing ribs 23 are spaced apart. For example, the number of the second reinforcing ribs 23 is four, and the four second reinforcing ribs 23 are spaced apart. The sizes of the second reinforcing ribs 23 may be the same or different. A limiting groove 32 is formed by the surface of the second reinforcing rib 23 near the side of the second mounting portion 22 being recessed downward. The limiting groove 32 is located at one end of the second reinforcing rib 23 close to the second hinge portion. The second mounting holes are disposed at one end far from the second hinge portion 21, and the number of the second mounting holes is multiple. For example, the number of the second mounting holes is three, and the second mounting holes may be disposed between adjacent second reinforcing ribs 23.

[0058] Exemplarily, the first hinge portion and the first mounting portion may be integrally formed by injection molding, and the second hinge portion and the second mounting portion may be integrally formed by injection molding. A plurality of first reinforcing ribs are disposed on the first mounting portion, and a plurality of second reinforcing ribs are disposed on the second mounting portion. Such a setting can enhance the strength of the first mounting portion and the second mounting portion.

[0059] In the hinge mechanism of the present disclosure embodiment, by disposing the limiting protrusion 31 and the limiting groove 32 on the reinforcing rib, the strength of the hinge mechanism can be further enhanced, any acting force on the second hinge portion 21 can be further reduced, the strength of the hinge mechanism is improved, and the hinge mechanism is protected from damage and fracture.

[0060] Referring to Figure 7 and Figure 8 As shown, in an exemplary embodiment, the limiting groove 32 penetrates through both sides of the second reinforcing rib 23 along the axis direction of the second hinge portion 21. The limiting groove 32 includes a bottom surface 321, a first side surface 322, and a second side surface 323. The first side surface 322 and the second side surface 323 are oppositely disposed. The first side surface 322 is the side close to the second hinge portion 21. The included angle between the first side surface and the bottom surface is greater than the included angle between the second side surface and the bottom surface. The first side surface and the bottom surface are arc-shaped.

[0061] Referring to Figure 7 and Figure 8 As shown, exemplarily, the limiting groove 32 penetrates through both sides of the second reinforcing rib 23 along the axis direction of the second hinge portion 21. That is to say, the left and right opposite sides of the limiting groove 32 are penetrated. In this way, the limiting protrusion 31 can reduce contact with the limiting groove 32, noise can be reduced, and it is convenient for the limiting protrusion 31 to be clamped in the limiting groove 32.

[0062] Referring to Figure 7 andFigure 8 As shown, illustratively, the limiting groove 32 is roughly U-shaped, the bottom surface 321 of the limiting groove 32 is the bottom surface of the U-shaped groove, and the first side surface 322 and the second side surface 323 are two opposite sides of the U-shaped groove. The first side surface 322 is arranged close to one side of the second hinged portion 21, and the angle between the first side surface 322 and the bottom surface 321 is greater than the angle between the second side surface 323 and the bottom surface 321, so that the limiting protrusion 31 can be pressed and clamped in the groove, and the noise caused by the contact between the limiting protrusion 31 and the limiting groove 32 can be reduced. The specific values ​​of the angle between the first side surface 322 and the bottom surface and the angle between the second side surface and the bottom surface are not limited here. The first side surface and the bottom surface are arranged in an arc shape, and the specific arc angle and shape of the first side surface and the bottom surface can be set according to actual needs.

[0063] Reference Figure 3 , Figure 5 as well as Figure 6 As shown, exemplarily, the limiting protrusion 31 includes a first protrusion portion 311, the first protrusion portion 311 is adapted to the limiting groove 32, the first protrusion portion 311 includes a first end face 312 and a second end face 313, the first end face 312 is a surface of the first protrusion portion 311 close to the first hinge portion 11, the second end face 313 is a surface of the first protrusion portion 311 away from the rotatable panel, the first end face 312 is arranged in an arc shape, and the second end face fits with the second side plane.

[0064] Exemplarily, the first protrusion 311 is matched with the limiting groove 32, that is, when the rotatable panel of the opening and closing device is at the maximum opening and closing angle, the first protrusion 311 is completely engaged and pressed in the limiting groove 32. The second end surface 313 is fitted with the second side surface 323. In this case, when the first hinge seat 1 and the second hinge seat 2 are made of polyoxymethylene resin material, the friction between the two components can be reduced, thereby avoiding abnormal noise.

[0065] Exemplarily, the materials of the first hinge seat 1 and the second hinge seat 2 both include polyoxymethylene resin material. For example, the materials of the first hinge seat 1 and the second hinge seat 2 both include polyoxymethylene resin material, and the specific materials of the first hinge seat 1 and the second hinge seat 2 are not limited here and can be set according to actual use requirements.

[0066] Reference Figure 6 As shown, in a disclosed embodiment, the limiting protrusion 31 also includes a second protrusion 314, one end of the second protrusion 314 is connected to the first protrusion 311, and a step portion is formed between the second protrusion 314 and the first protrusion 311. When the first protrusion 311 is engaged with the limiting groove 32, the second protrusion 314 overlaps the first surface.

[0067] Reference Figure 1As shown, in a disclosed embodiment, the limiting protrusion 31 and the limiting groove 32 are interference fit. The limiting protrusion 31 and the first limiting groove 32 form an interference fit, which can prevent the generation of friction noise caused by the shaking caused by the elasticity of the hinge, and at the same time, it can also limit the door body when the opening and closing device is at the maximum door opening angle to prevent the door body from closing accidentally.

[0068] Among them, the limiting protrusion 31 is set as a block structure rather than a long strip structure, so that it can meet the design requirements of the hinge, that is, to ensure that the hinge mechanism cannot fail within a certain door opening force range, and 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 80N is used to push the door, so the limiting protrusion 31 and the limiting groove 32 are set to achieve the limit; and the design requires that when a force greater than 80N is used to push the door, the hinge mechanism can fail, but cannot be damaged or broken. The embodiment of the present disclosure can prevent the second hinge from being damaged by force through the cooperation of the limiting protrusion and the limiting groove, and can further ensure that when a large force is used to push the door, the hinge will not break, but will only cause the hinge mechanism to rotate excessively and fail.

[0069] Reference Figure 9 and Figure 10 As shown, in a disclosed embodiment, the connection structure 4 includes a piston 41, an elastic member 42 and a connection shaft 43. The first hinged part 11 has a first matching structure, the second hinged part 21 is provided with a second accommodating cavity and a second opening, the piston 41 is arranged in the second accommodating cavity, the piston 41 has a second matching structure, and the second matching structure abuts against the first matching structure through the second opening. The elastic member 42 is arranged in the second accommodating cavity, and is located at the end of the piston 41 away from the second matching structure. The connection shaft 43 passes through the first hinged part 11, the piston 41, the elastic member 42 and the second hinged part 21, so that the first hinged part 11 and the second hinged part 21 are relatively fixed along the axial direction.

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

[0071] In the embodiments of the present disclosure, since the elastic member 42 can provide assistance for the abutting state, during the process of closing the rotatable panel, the problem of violent collision between the rotatable panel and the fixed structure caused by the rapid descent of the rotatable panel can be alleviated, improving the user experience. Moreover, the piston 41 and the elastic member 42 are both arranged in the second accommodation cavity of the second hinge portion 21, and the first hinge portion 11, the second hinge portion 21, the piston 41 and the elastic member 42 can be assembled and connected through the connecting shaft 43. The hinge is simple and convenient to assemble, reducing the space occupied by the hinge mechanism.

[0072] In an disclosed embodiment, the second matching structure includes a first spiral surface S1, the first matching structure includes a first matching surface M1 corresponding to the first spiral surface S1, the second matching structure 411 further includes a second spiral surface S2 and a third spiral surface S3. The first spiral surface S1, the second spiral surface S2 and the third spiral surface S3 are sequentially connected along the first circumferential direction. The spiral direction of the second spiral surface S2 is opposite to that of the first spiral surface S3, and the spiral direction of the third spiral surface S3 is the same as that of the first spiral surface S1. The first matching structure further includes a second matching surface M2 connected to the first matching surface M1, and the spiral direction of the second matching surface M2 is opposite to that of the first matching surface M1.

[0073] When the opening and closing device is in the open door state, the first matching surface M1 abuts against the first spiral surface S1. When the opening and closing device is in the closed door state, the second matching surface M2 abuts against the second spiral surface S2, and the first matching surface M1 abuts against the third spiral surface S3.

[0074] In the embodiments of the present disclosure, the first spiral surface S1 is used to support the door body to reach the balanced state when opening the door, so that the door body realizes the hovering effect. The second spiral surface S2 is used to apply a downward pressure to the door body after closing the door to ensure the closing effect of the door body. The second spiral surface S2 is used to limit the relative position of the first hinge seat and the second hinge seat before the hinge is installed, preventing the hinge from accidentally popping open during storage and transportation. Without the cooperation of the third spiral surface S3 and the first matching surface M1, the first hinge seat 1 may rotate in the non-working direction. If the first hinge seat rotates in the reverse direction, the hinge may fail and become unusable. In the embodiments of the present disclosure, the third spiral surface S3 abuts against the first matching surface M1 to play a limiting role, preventing the first hinge seat from rotating in the reverse direction and ensuring that the hinge can be used normally when installed on the opening and closing device.

[0075] In an exemplary embodiment, a convex structure is provided on the second mating surface M2, a guiding groove extending axially is provided on the side wall of the piston 41, a corresponding guiding protrusion is provided on the side wall of the second accommodating cavity, the guiding protrusion is arranged in the guiding groove, and when the opening / closing device is at the maximum door opening angle, the guiding protrusion abuts against the convex structure. Such an arrangement can assist in limiting the maximum angle of the opening door. In an exemplary embodiment, the second mating structure further includes a second mating side surface, the first mating structure further includes a first mating side surface, and when the opening / closing device is at the maximum door opening angle, the second mating side surface abuts against the first mating side surface. Such an arrangement can assist in limiting the maximum angle of the opening door.

[0076] In an exemplary embodiment, the second mating structure further includes a second mating top surface, the first mating structure further includes a first mating top surface, and when the opening / closing device is at the maximum door opening angle, the first mating top surface abuts against the second mating top surface. Such an arrangement can assist in limiting the maximum angle of the opening door.

[0077] Exemplarily, the hinge mechanism further includes a fastener, the fastener is connected to both ends of the connecting shaft 43 to axially fix the first hinge seat 1 and the second hinge seat 2 relative to each other. Among them, a gasket is further included, the center of the gasket has a non-circular hole, and the end of the connecting shaft 43 penetrates into the non-circular hole and is riveted to the gasket.

[0078] Exemplarily, the non-circular hole of the gasket is a polygonal hole, such as a regular hexagon. With such an arrangement, when the connecting shaft 43 is riveted to the gasket, the relative fixation between the gasket and the connecting shaft can be ensured, playing a limiting role and avoiding damage. Because continuous friction occurs when the connecting shaft and the gasket rotate relative to each other, which may cause strength problems. For example, the riveting part is worn off.

[0079] Exemplarily, the piston 41 is provided with weight-reducing holes, and a plurality of weight-reducing holes are arranged at intervals along the circumferential direction based on the central axis of the piston 41 itself. In this way, the weight of the piston 41 and the hinge can be reduced, and the injection molding defects caused by solid injection molding of the piston 41 can be avoided.

[0080] Exemplarily, a first positioning protrusion is provided along the center at the bottom end of the piston 41, the first positioning protrusion is used to position the elastic member, a second positioning protrusion is provided along the center at the bottom end of the second accommodating cavity, and the second positioning protrusion is used to position the elastic member. By positioning the elastic member through the first positioning protrusion and the second positioning protrusion, the elastic member can be prevented from shaking, thereby reducing the wear of the elastic member. Moreover, when a counterbore is provided at the bottom end of the second hinge seat corresponding to the fastener at the end of the connecting shaft, the second positioning protrusion can also play a role in improving the structural strength of the second hinge seat.

[0081] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an opening and closing device, including: a box body and a door body. The box body has an opening, and the door body is hinged to the opening of the box body through the hinge mechanism of any one of the embodiments of the present disclosure.

[0082] Exemplarily, the opening and closing device of the embodiments of the present disclosure may be a freezer, or the opening and closing device may also be other devices that can be opened and closed, such as dishwashers and storage lockers.

[0083] The above hinge mechanism and other components of the embodiments of the opening and closing device may adopt various technical solutions known to those of ordinary skill in the art now and in the future, and will not be described in detail here.

[0084] In the description of this specification, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure.

[0085] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise specifically defined.

[0086] In the present disclosure, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0087] In this disclosure, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0088] The above disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the present disclosure, components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0089] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A hinge mechanism, characterized in that: include: A first hinge seat, comprising a first hinge portion and a first mounting portion, wherein the first mounting portion is used to connect with a rotatable panel of the opening and closing device; A second hinged seat, comprising a second hinged portion and a second mounting portion, wherein the second mounting portion is used to be connected to a fixed structure of the opening and closing device, the first hinged portion and the second hinged portion are rotatably connected via a connecting structure, and the first hinged portion can rotate relative to the axis of the second hinged portion; The limiting structure includes a limiting protrusion and a limiting groove, wherein the limiting protrusion is arranged on a first side edge, and the limiting groove is arranged on a first surface, the first side edge is a side of the first mounting portion close to the second hinge seat, and the first surface is a surface of the second mounting portion facing away from the fixed structure, and when the rotatable panel of the opening and closing device is at the maximum opening and closing angle, the limiting protrusion is at least partially clamped and pressed into the limiting groove.

2. The hinge mechanism according to claim 1, characterized in that: A plurality of first reinforcing ribs are arranged on the side of the first mounting portion facing away from the rotatable panel, the first reinforcing ribs are extended along an axis perpendicular to the first hinge portion, one end of the limiting protrusion is connected to the first reinforcing rib and is located on the first side, and a plurality of second reinforcing ribs are arranged on the first surface of the second mounting portion, the second reinforcing ribs are extended along an axis perpendicular to the second hinge portion, and the limiting groove is located on the second reinforcing rib.

3. The hinge mechanism according to claim 2, characterized in that: The limiting groove passes through both sides of the second reinforcing rib along the axial direction of the second hinge part, and the limiting groove includes a bottom surface, a first side surface and a second side surface, the first side surface and the second side surface are arranged opposite to each other, the first side surface is a side close to the second hinge part, the angle between the first side surface and the bottom surface is greater than the angle between the second side surface and the bottom surface, and the first side surface and the bottom surface are arranged in an arc shape.

4. The hinge mechanism according to claim 3, characterized in that: The limiting protrusion includes a first protrusion portion, the first protrusion portion is adapted to the limiting groove, the first protrusion portion includes a first end face and a second end face, the first end face is the surface of the first protrusion close to the first hinge portion, the second end face is the surface of the first protrusion away from the rotatable panel, the first end face is arranged in an arc shape, and the second end face is fitted with the second side plane.

5. The hinge mechanism according to claim 4, characterized in that: The first hinge seat and the second hinge seat are both made of polyoxymethylene resin.

6. The hinge mechanism according to claim 4, characterized in that: The limiting protrusion also includes a second protrusion, one end of which is connected to the first protrusion, a step portion is formed between the second protrusion and the first protrusion, and when the first protrusion is engaged with the limiting groove, the second protrusion overlaps the first surface.

7. The hinge mechanism according to claim 1, characterized in that: The limiting protrusion and the limiting groove are in interference fit.

8. The hinge mechanism according to claim 1, characterized in that: The connection structure comprises: The first hinged portion has a first matching structure, the second hinged portion is provided with a second accommodating cavity and a second opening, the piston is provided in the second accommodating cavity, the piston has a second matching structure, and the second matching structure abuts against the first matching structure through the second opening; an elastic member, disposed in the second accommodating cavity and located at an end of the piston away from the second matching structure; A connecting shaft is provided through the first hinged part, the piston, the elastic member and the second hinged part, so that the first hinged part and the second hinged part are relatively fixed in the axial direction.

9. The hinge mechanism according to claim 8, characterized in that: The second matching structure includes a first helical surface, the first matching structure includes a first matching surface corresponding to the first helical surface, the second matching structure also 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 matching structure also includes a second matching surface connected to the first matching surface, the second matching surface has a helical direction opposite to that of the first matching surface; When the opening and closing device is in an open state, the first mating surface abuts against the first helical surface; when the opening and closing device is in a closed state, the second mating surface abuts against the second helical surface, and the first mating surface abuts against the third helical surface.

10. An opening and closing device, characterized in that: include: A box body having an opening; A door body, wherein the door body is hinged at the opening of the box body through the hinge mechanism described in any one of claims 1 to 9.

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