Hinge mechanism and opening and closing equipment

Abstract

The utility model discloses a hinge mechanism and opening and closing equipment, a first hinge seat of the hinge mechanism comprises a first hinge part, and a second hinge seat comprises a second hinge part rotatably connected with the first hinge part and a second mounting part used for being mounted and embedded in a mounting cavity of an opening and closing equipment main body; the mounting cavity comprises a front side wall and inner side walls located on the two sides of the front side wall. The side face, close to the inner side walls, of the second mounting part is provided with an elastic piece structure. The elastic piece structure extends in the height direction of the second mounting part, a containing groove is formed in the side face of the second mounting part, the elastic piece structure comprises a fixed end and a free end, the fixed end is connected with the bottom of the containing groove, in the initial state, the free end at least partially protrudes out of the side face, and in the compression state, the free end is elastically compressed and recycled into the containing groove. The hinge mechanism can be prevented from loosening after being used for a long time, and the installation reliability is improved through the elastic piece structure arranged on the side face.

Description

TECHNICAL FIELD

[0001] The embodiments of the present disclosure relate to the field of hinge mechanisms, and in particular, to a hinge mechanism and an opening and closing device. BACKGROUND

[0002] The hinge mechanism is installed on a door body to realize opening and closing of the door body. For example, the hinge mechanism installed on a freezer includes a fixed seat connected with a cabinet body, a rotating seat connected with a door body, and a core shaft penetrating through the fixed seat and the rotating seat, and some hinge mechanisms further include an elastic member.

[0003] In the related art, due to the opening door thrust, the elastic force of the elastic member, and inertia, a very large torque is formed, so that the rotating seat may be subjected to a large force when rotating. The rotating seat and the fixed seat are fixed as a whole through the core shaft, so that the force received by the rotating seat drives the fixed seat to lean backward. In the related art, the fixed seat is connected with the cabinet body through a screw, so that the hinge cannot be completely prevented from leaning backward, resulting in reduced reliability of the hinge mechanism, and the hinge mechanism is prone to loosening after long-term use. CONTENT OF THE UTILITY MODEL

[0004] As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a hinge mechanism, comprising

[0005] The first hinge seat comprises a first hinge part;

[0006] 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, and the second mounting part is used for mounting an embedded structure in a mounting cavity of a main body of an opening and closing device. The mounting cavity comprises a front side wall and inner side walls located on both sides of the front side wall. The side surface of the second mounting part close to the inner side wall is provided with a spring structure;

[0007] The spring structure is arranged along the height direction of the second mounting part. The side surface of the second mounting part is provided with a receiving groove. The spring structure comprises a fixed end and a free end. In an initial state, the free end at least partially protrudes from the side surface. In a compressed state, the free end is elastically compressed close to the receiving groove.

[0008] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an opening and closing device, comprising:

[0009] The device main body is provided with a third opening. The outer side wall of the device main body is provided with a mounting cavity recessed towards the inside of the device main body. The mounting cavity is provided with a fourth opening towards the outside of the device main body.

[0010] The door body is connected to the third opening of the device body through the hinge mechanism of any one of the embodiments of the present disclosure, the first hinge seat is connected to the side wall of the door body, the second hinge part is at least partially located in the mounting cavity, and the second mounting part is embedded in the mounting cavity.

[0011] The technical scheme of the embodiments of the present disclosure can have the following beneficial effects: the hinge mechanism, the second hinge seat is connected to the opening and closing device body through the second mounting part, the second mounting part is used for embedding in the mounting cavity of the opening and closing device body, when the opening and closing device is opened, the mounting cavity can limit the second hinge seat through the second mounting part, so that the hinge mechanism is no longer tilted backward after being stressed, the anti-backward tilting effect is achieved, the stability and firmness of the hinge mechanism are improved, the hinge mechanism is prevented from loosening after long-term use, and the reliability of the plug-in connection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1a It is an assembly diagram of the hinge mechanism and the opening and closing device body of the embodiments of the present disclosure.

[0013] Figure 1b It is an exploded diagram of the hinge mechanism and the opening and closing device body of the embodiments of the present disclosure.

[0014] Figure 1c It is an exploded diagram of the hinge mechanism of the embodiments of the present disclosure.

[0015] Figure 1d It is a side view of the second hinge seat of the embodiments of the present disclosure.

[0016] Figure 1e It is another side view of the second hinge seat of the embodiments of the present disclosure.

[0017] Figure 1f It is a partial view of the device body of the embodiments of the present disclosure.

[0018] Figure 1g It is another view of the device body of the embodiments of the present disclosure.

[0019] Figure 1h It is a bottom view of the device body of the embodiments of the present disclosure.

[0020] Figure 2 It is a side view of the second hinge seat of the embodiments of the present disclosure.

[0021] Figure 3a It is a rear view of the first hinge seat of the embodiments of the present disclosure.

[0022] Figure 3b It is a side view of the first hinge seat of the embodiments of the present disclosure.

[0023] Figure 4aThis is a schematic diagram of a piston according to an embodiment of the present disclosure;

[0024] Figure 4b This is a schematic diagram of a piston according to an embodiment of the present disclosure;

[0025] Figure 5a This is a schematic diagram of the main body of the device according to an embodiment of the present disclosure;

[0026] Figure 5b This is a schematic diagram of the main body of the device according to an embodiment of the present disclosure. Figure Two ;

[0027] Figure 5c This is a schematic diagram of the second hinge seat from a side view according to an embodiment of the present disclosure;

[0028] Figure 5d This is a side view of the second hinge seat according to an embodiment of the present disclosure. Figure Two . Detailed Implementation

[0029] The contents of this disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1a-1h As shown, this embodiment of the present disclosure provides a hinge mechanism 100. The hinge mechanism 100 includes a first hinge seat 10 and a second hinge seat 20. The first hinge seat 10 includes a first hinge portion 11. The second hinge seat 20 includes a second hinge portion 21 and a second mounting portion 22, the second hinge portion 21 being rotatably connected to the first hinge portion 11. The second mounting portion 22 is used for mounting in a mounting cavity of the opening and closing device body 200. The mounting cavity 201 includes a front sidewall 2011 and inner sidewalls 2012 located on both sides of the front sidewall 2011. A spring sheet structure 90 is provided on the side of the second mounting portion 22 near the inner sidewall 2012.

[0031] like Figures 1c-1e As shown, the spring-loaded structure 90 extends along the height direction of the second mounting portion 22, and a receiving groove S is provided on the side of the second mounting portion 22. The spring-loaded structure 90 includes a free end 91 and a fixed end 92, with the free end 91 disposed near the second hinge portion 21 relative to the fixed end 92. The fixed end 92 is connected to the bottom of the receiving groove S. In the initial state, the free end 91 protrudes at least partially from the side, and in the compressed state, the free end 91 is elastically compressed and close to the receiving groove S. For example, the free end 91 elastically compresses and retracts into the receiving groove S.

[0032] like Figure 1dAs shown, the side of the second mounting portion 22 is provided with a receiving groove S, which can be roughly matched with the shape of the elastic sheet structure 90. For example, the elastic sheet structure 90 is a square sheet, and the receiving groove S is a square groove. The specific shape of the receiving groove S can not be limited, and the receiving groove S can also be circular or other irregular shapes. The specific size of the receiving groove S is not limited here and can be correspondingly set according to the size of the elastic sheet structure 90.

[0033] The elastic sheet structure 90 extends along the height direction of the second mounting portion 22, and the elastic sheet structure 90 extends along the height direction of the side of the second mounting portion 22. The bottom of the receiving groove S is away from one side of the second hinge portion. The fixed end of the elastic sheet structure 90 is connected to the bottom of the receiving groove S and extends along the height of the receiving groove S, so that in the initial state, the free end 91 at least partially protrudes from the side. When the second mounting portion is inserted into the mounting cavity, the free end of the elastic sheet structure 90 is compressed and elastically deformed, thereby being compressed and recovered into the receiving groove S, and when the pressure of the free end of the elastic sheet structure 90 disappears, the free end of the elastic sheet structure 90 returns to the initial state, thereby clamping the elastic sheet structure 90, further improving the stability and reliability of the installation.

[0034] As shown, Figures 1b-1g The hinge mechanism of the embodiment of the present disclosure is provided with one elastic sheet structure 90 on the side of the second mounting portion 22 near the two inner side walls 2012 of the mounting cavity 201 (the left and right sides of the second mounting portion 22 in the figure are respectively provided with one elastic sheet structure 90. It should be noted that the inner side walls 2012 of the mounting cavity 201 of the opening and closing device main body 200 are recessed to form a first clamping groove 204, and the elastic sheet structure 90 cooperates with the first clamping groove 204 to be clamped and fixed, which can ensure the stability and reliability of the second mounting portion 22.

[0035] Exemplarily, the free end 91 of the elastic sheet structure of the embodiment of the present disclosure is arranged close to the second hinge portion 21 relative to the fixed end 92, that is, the free end 91 is above the fixed end 92. Such arrangement can make the elastic sheet structure 90 as a whole be clamped and fixed with the first clamping groove 204 of the inner side wall of the mounting cavity when the mounting cavity is inserted and clamped, thereby improving the stability and reliability of the installation of the second mounting portion 22.

[0036] In an embodiment, the second mounting portion 22 is configured to be mounted in the mounting cavity of the opening and closing device body 200. The second mounting portion 22 is provided with a second mounting hole configured to cooperate with a fastener 300 to fix the second mounting portion 22 to the opening and closing device body 200. The second mounting hole penetrates the front face and the back face of the second mounting portion 22, and the fastener 300 penetrates the second mounting hole to fix the second mounting portion 22 to the opening and closing device body 200. It should be noted that the second mounting hole can be arranged according to the actual use environment of the hinge mechanism.

[0037] In an embodiment, the second mounting portion 22 is configured to be mounted in the mounting cavity of the opening and closing device body 200. The second mounting portion 22 is provided with a second mounting hole configured to cooperate with a fastener 300 to fix the second mounting portion 22 to the opening and closing device body 200. The second mounting hole penetrates the front face and the back face of the second mounting portion 22, and the fastener 300 penetrates the second mounting hole to fix the second mounting portion 22 to the opening and closing device body 200. It should be noted that the second mounting hole can be arranged according to the actual use environment of the hinge mechanism.

[0038] In an embodiment, the first hinge seat 10 is a rotating seat, and the second hinge seat 20 is a fixed seat. The hinge mechanism can be connected between the door body and the body of the opening and closing device (e.g., a freezer), so that the door body and the body are hinged. The second mounting portion 22 can be provided with a second mounting hole, and the second hinge seat 20 can be fixed to the opening and closing device body 200 by a screw passing through the second mounting hole.

[0039] In an embodiment, the first hinge seat 10 can be connected to the side wall of the door body of the opening and closing device and rotate with the door body, and the second hinge seat 20 is connected to the opening and closing device body 200 through the second mounting portion 22. When the door body is closed to the opening and closing device body 200, the first hinge portion 11 and the second hinge portion 21 can be considered to be in the same plane.

[0040] In an embodiment, the hinge mechanism has a first attitude and a second attitude. The first hinge seat 10 can reciprocate relative to the second hinge seat 20 within a predetermined angle range, so that the first cooperating structure and the second cooperating structure slide relative to each other to switch the hinge mechanism between the first attitude and the second attitude. When the hinge mechanism is assembled, the first attitude of the hinge mechanism can correspond to the closed state of the door body of the opening and closing device and the state in which the door body is opened at a small angle, and the second attitude can correspond to the maximum open state of the door body of the opening and closing device and the state in which the door body is opened at a large angle.

[0041] Exemplarily, the second mounting portion 22 is used to be mounted in the mounting cavity of the opening and closing device body 200. The opening and closing device body 200 is provided with a mounting cavity 201, which can include a first cavity and a second cavity arranged along the left-right direction, the depth of the first cavity is greater than that of the second cavity, the first hinge seat 10 is mounted through the second cavity, and the second hinge seat 20 is mounted through the first cavity. For example, the second mounting portion 22 of the second hinge seat 20 is completely mounted in the second cavity of the opening and closing device body 200, and the second hinge portion 21 is at least partially located in the second cavity. The first hinge portion 11 is mounted through the first cavity and at least partially located outside the first cavity.

[0042] With reference to Figures 1a-1g Exemplarily, the second mounting portion 22 is mounted in the mounting cavity of the opening and closing device body 200, and the second mounting portion 22 can be spaced apart from the inner side wall of the mounting cavity or can be attached to the inner side wall of the mounting cavity. For example, in the front-rear direction of the opening and closing device body, the second mounting portion 22 can be limited by the inner side wall of the mounting cavity, and in the up-down direction of the opening and closing device body, the second mounting portion 22 can be limited by the bottom of the mounting cavity, so that the hinge mechanism is no longer tilted backward after being stressed, thereby achieving the effect of preventing backward tilting, improving the stability of the hinge mechanism, and preventing the hinge mechanism from loosening after long-term use.

[0043] The hinge mechanism of the embodiment of the present disclosure can be mounted in the mounting cavity 201 of the opening and closing device body 200, and the mounting cavity 201 can further limit the second mounting portion 22, so that the hinge mechanism is no longer tilted backward after being stressed, thereby achieving the effect of preventing backward tilting, improving the stability and reliability of the hinge mechanism, and preventing the hinge mechanism from loosening after long-term use. The side surface of the second mounting portion 22 is provided with a spring sheet structure 90, the free end 91 of the spring sheet structure is arranged close to the second hinge portion 21 relative to the fixed end 92, and the spring sheet structure 90 can be integrally clamped and mounted in the first clamping groove 204, thereby improving the reliability of the fixation of the second mounting portion 22.

[0044] In one disclosed embodiment, the spring sheet structure 90 is integrally formed with the second mounting portion 22. The material of the spring sheet structure 90 can be selected according to actual use requirements.

[0045] Exemplarily, the spring sheet structure 90 can also be mounted in a detachable manner, and the spring sheet structure 90 and the accommodating groove bottom can be connected and fixed in a detachable manner.

[0046] As Figures 1b-1eAs shown in the drawings, in one disclosed embodiment, the elastic sheet structure 90 is obliquely arranged, and the height and width of the elastic sheet structure 90 are both smaller than the height and width of the accommodating groove. The thickness of the elastic sheet structure 90 in the height direction is substantially equal, and the elastic sheet structure 90 is obliquely arranged, with the free end obliquely arranged to the outside of the side surface of the second mounting portion 22 relative to the fixed end. The angle of the oblique arrangement of the elastic sheet structure 90 can be selected according to actual use requirements, and is not limited herein.

[0047] As shown in the drawings, Figure 1d As shown in the drawings, in one disclosed embodiment, the outer side of the free end 91 is provided with a positioning portion 93 matched with the inner side wall. Exemplarily, the outer side of the free end 91 is cut to form a square plane, the square plane forms the positioning portion 93, and the positioning portion 93 can be attached to the inner side wall, thereby facilitating the downward sliding of the second mounting portion 22 when being inserted into the mounting cavity.

[0048] As shown in the drawings, Figures 1a-1g As shown in the drawings, in one disclosed embodiment, the first relief portion 224 is arranged at the bottom position of the second mounting portion 22 close to the front side wall 2011, and the front side wall 2011 is provided with a first matching portion 2011a matched with the first relief portion 224.

[0049] As shown in the drawings, Figure 1a and Figure 1g As shown in the drawings, exemplarily, the first relief portion 224 can be wedge-shaped. For example, the first relief portion 224 is a wedge-shaped surface obliquely arranged from the bottom surface of the second mounting portion 22 to the front surface of the second mounting portion 22. The first matching portion 2011a can be a bevel matched with the wedge-shaped surface of the first relief portion 224, and the oblique angle of the first relief portion 224 is not limited herein. It should be noted that the first relief portion 224 can also be other shapes or concave shapes, and the shape of the first matching portion 2011a is matched with the shape of the first relief portion 224.

[0050] As shown in the drawings, Figure 1b As shown in the drawings, in one disclosed embodiment, the second mounting hole includes a first sub-hole and a second sub-hole, the diameter of the first sub-hole is larger than the diameter of the second sub-hole, and the second sub-hole is arranged away from the front surface relative to the first sub-hole. The side surface of the second mounting portion 22 is provided with an accommodating groove S penetrating through the first sub-hole, the fixed end 92 is connected with the accommodating groove S, and the free end 91 is arranged protruding from the side surface, and the free end 91 can be extended or retracted relative to the fixed end 92 to approach or move away from the accommodating groove S.

[0051] As shown in the drawings, Figure 1f and Figure 1g As shown in the drawings, exemplarily, the inner side wall 2012 of the mounting cavity 201 of the opening and closing device body 200 is concavely formed with a first clamping groove 204, and the elastic sheet structure 90 is matched with the first clamping groove 204 to be clamped and fixed, thereby ensuring the stability and reliability of the second mounting portion 22.

[0052] Exemplarily, the thickness of the accommodating groove (in the thickness direction of the second mounting portion) can be less than the depth of the first sub-hole. The fixed end 92 is fixedly connected to the side of the accommodating groove S close to the bottom surface of the second mounting portion, and the free end 91 is gradually protruding from the side surface of the second mounting portion in a direction away from the fixed end 92. When the second mounting portion 22 is inserted into the mounting cavity, the free end 91 of the elastic sheet structure 90 is pressed by the inner side wall of the mounting cavity and elastically shrinks into the accommodating groove. When the second mounting portion 22 is inserted into place, that is, the elastic sheet structure 90 is in place in the first clamping groove 204, the free end 91 of the elastic sheet structure 90 restores the elastic deformation and is clamped in the first clamping groove 204, thereby fixing the second mounting portion 22 and the mounting cavity.

[0053] Referring to Figure 2 In a disclosed embodiment, the thickness of the second mounting portion 22 is less than the diameter of the second hinge portion 21, and the difference between the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is less than or equal to a preset value. The thickness of the second mounting portion 22 can be understood as the dimension of the second mounting portion 22 in the direction perpendicular to the axis direction of the second hinge portion 21 (the front-rear direction in the figure).

[0054] It should be noted that the difference between the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is less than or equal to a preset value, which can be understood as that the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are arranged substantially flush. Exemplarily, the difference can be 0, that is, the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are arranged flush, that is, the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are in the same plane. In this way, the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 can jointly abut against the inner side wall of the device main body, thereby improving the firmness of the second hinge seat.

[0055] It should be noted that the specific value of the difference between the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is not limited herein, for example, the difference between the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 can be 5mm-8mm.

[0056] In an embodiment, the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are arranged flush, and the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are both planar, and the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are arranged flush.

[0057] In an embodiment, the second mounting portion 22 can be provided with a plurality of grooves, that is, the second mounting portion 22 is provided with a second reinforcing rib, and the back surface of the second mounting portion 22 can be understood as the surface of the second reinforcing rib.

[0058] Referring to Figure 1d and Figure 1eAs shown in the figure, in a disclosed embodiment, the second mounting portion 22 comprises a back surface 221 and a bottom surface 222, both of which are planar, the back surface 221 is in contact with the inner side wall of the mounting cavity, and the bottom surface 222 is in contact with the bottom surface of the mounting cavity. Thus, the bottom surface and the inner side wall of the mounting cavity can limit the bottom and back of the second mounting portion, preventing backward inclination.

[0059] Referring to Figure 1d and Figure 1e As shown in the figure, in a disclosed embodiment, the second mounting portion 22 comprises a back surface 221 and a bottom surface 222, both of which are planar, the back surface 221 is in contact with the inner side wall of the mounting cavity, and the bottom surface 222 is in contact with the bottom surface of the mounting cavity. Thus, the bottom surface and the inner side wall of the mounting cavity can limit the bottom and back of the second mounting portion, preventing backward inclination.

[0060] Referring to Figure 2 As shown in the figure, in a disclosed embodiment, the thickness d of the second mounting portion 22 gradually increases 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 close to the second hinge portion 21.

[0061] Referring to Figure 2 As shown in the figure, in a disclosed embodiment, the thickness d of the second mounting portion 22 gradually increases 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 close to the second hinge portion 21. The second mounting portion 22 further comprises a front surface 223, which is arranged opposite to the back surface of the second mounting portion 22, and the front surface 223 is arranged at an included angle α with the back surface of the second mounting portion 22, and the included angle α is an acute angle.

[0062] Referring to Figure 2 As shown in the figure, for example, the thickness d of the bottom surface of the second mounting portion 22 is less than the thickness d of the position of the second mounting portion 22 close to the second hinge portion 21, that is, the thickness d of the second mounting portion 22 gradually increases from the bottom surface to the top surface close to the second hinge portion 21.

[0063] Referring to Figure 2 As shown in the figure, for example, the back surface of the second mounting portion 22 can be arranged at a substantially right angle with the bottom surface, and the front surface 223 of the second mounting portion 22 is arranged at an acute angle α with the vertical direction, so that the cross section of the second mounting portion 22 is substantially a right trapezoid, and the front surface 223 of the second mounting portion 22 is the hypotenuse of the right trapezoid.

[0064] The second mounting portion 22 of the hinge mechanism of the related art is generally provided as a flat plate inserted into a flat groove, which causes a gap between the second mounting portion and the flat groove, resulting in insufficient mounting of the second mounting portion 22 and the flat groove. In the hinge mechanism of the disclosed embodiment, the thickness of the second mounting portion 22 gradually increases 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 close to the second hinge portion 21, and the front face 223 of the second mounting portion 22 is provided at an acute angle with the back face of the second mounting portion 22, that is, the second mounting portion 22 is in the shape of a right-angled trapezoid as a whole. The mounting cavity of the device body can be provided as a right-angled trapezoidal mounting groove matched with the second mounting portion 22, and a gap can be formed between the bottom face of the second mounting portion 22 and the mounting cavity, which ensures that the second mounting portion 22 is more compactly inserted and fitted, and reduces the gap.

[0065] Referring to Figure 1b and Figure 1c In one disclosed embodiment, the first hinge seat 10 further includes a first mounting portion 12, and the first hinge portion 11 and the second hinge portion 21 are arranged along the central axis and can be rotatably connected through a connecting shaft, and the first mounting portion 12 and the second mounting portion 22 are respectively located on the two sides of the central axis.

[0066] For example, the first mounting portion 12 is entirely deviated to the left side of the central axis, and the second mounting portion 22 is entirely deviated to the right side of the central axis. Alternatively, the first mounting portion 12 is entirely deviated to the right side of the central axis, and the second mounting portion 22 is entirely deviated to the left side of the central axis.

[0067] For example, the first mounting portion 12 and the second mounting portion 22 are respectively arranged on different sides of the first hinge seat and the second hinge seat. For example, when the opening and closing device is in the closed state, the second mounting portion 22 is arranged on the back side of the second hinge portion 21 close to the mounting cavity, and the first mounting portion 12 is arranged on the back side of the first hinge portion 11 away from the mounting cavity.

[0068] Referring to Figure 2 In one disclosed embodiment, the thickness d of the second mounting portion 22 is 10-14 mm. For example, the thickness d of the second mounting portion 22 can be understood as the average thickness of the second mounting portion 22, or the thickness d of the second mounting portion 22 can also be understood as the thickness of the second mounting portion 22 at all positions in the height direction. For example, the thickness d of the second mounting portion 22 can be 10 mm, 10.8 mm, 11 mm, 12 mm, 13 mm, 14 mm, etc. The specific value of the thickness d of the second mounting portion 22 can be set according to actual use requirements.

[0069] Referring to Figure 2As shown in the drawings, in one disclosed embodiment, the sum h of the height of the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is less than 40 mm. Exemplarily, the back surface of the second hinge portion 21 can represent the planar portion of the second hinge portion 21 adjacent to the second mounting portion 22. The sum h of the height of the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is less than 40 mm. If the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 are designed too high, the mounting box of the corresponding device body will be too high, which can affect the transportation of the opening and closing device, and can also affect the internal structure of the opening and closing device body. The sum of the height of the back surface of the second mounting portion 22 and the back surface of the second hinge portion 21 is set to be less than 40 mm, which is appropriate in size, can save materials, and is convenient for transportation. On the other hand, the height of the second mounting portion 22 can also be set according to the need to ensure that the hinge mechanism is more stable.

[0070] Referring to Figure 3a and Figure 3b As shown in the drawings, in one disclosed embodiment, the first hinge seat 10 further comprises a first mounting portion 12, and the first mounting portion 12 is provided with a first mounting hole 121, which is used in cooperation with a fastener to fix the first mounting portion 12 on the door body of the opening and closing device. For example, the first hinge seat 10 can be connected with the side wall of the door body through the first mounting portion 12, and rotates with the door body. When the door body is closed with the device body, the first hinge portion 11 and the second hinge portion 21 can be regarded as being in the same plane.

[0071] Exemplarily, the number of the first mounting hole 121 and the second mounting hole can be multiple, for example, the number of the first mounting hole 121 can be three, and the number of the second mounting hole can be two. The number, shape and size of the first mounting hole 121 and the second mounting hole can be set according to the actual use requirement.

[0072] Referring to Figure 3a and Figure 3b As shown in the drawings, in one disclosed embodiment, the first hinge seat 10 further comprises a first mounting portion 12, and the first mounting portion 12 is provided with a first mounting hole 121, which is used in cooperation with a fastener to fix the first mounting portion 12 on the door body of the opening and closing device. For example, the first hinge seat 10 can be connected with the side wall of the door body through the first mounting portion 12, and rotates with the door body. When the door body is closed with the device body, the first hinge portion 11 and the second hinge portion 21 can be regarded as being in the same plane.

[0073] Referring to Figure 1e , Figure 3a and Figure 3bAs shown, in an embodiment, the first hinge seat 10 further comprises a first mounting portion 12, and the first mounting portion 12 is provided with a first reinforcing rib 13, and the second mounting portion 22 is provided with a second reinforcing rib 23. As an example, the second mounting portion 22 is provided with the second reinforcing rib 23, and the second reinforcing rib 23 is arranged on the side of the second mounting portion 22 abutting against the side wall of the mounting cavity. The number of the second reinforcing rib 23 can be multiple, and the second reinforcing rib 23 can be arranged in a cross-regular distribution, and the second reinforcing rib 23 crosses to form a rhombus or square grid. The specific shape and number of the second reinforcing rib 23 are not limited here. The back surface of the second reinforcing rib 23 as a whole is flat, and the second reinforcing rib 23 is at least partially overlapped on the second hinge portion 21. The number of the first reinforcing rib 13 can be multiple, and the first reinforcing rib 13 can be arranged in a cross-regular distribution. In the embodiment, the reinforcing ribs are arranged on the first mounting portion 12 and the second mounting portion 22, which can enhance the structural strength of the first mounting portion 12 and the second mounting portion 22.

[0074] Referring to Figures 1a-1c , Figures 3a-3b As shown, in an embodiment, the hinge mechanism further comprises a second limiting structure 30, and the second limiting structure 30 comprises a first limiting protrusion 31 and a first limiting groove 32. The first limiting protrusion 31 is arranged on the side of the first mounting portion 12 close to the second hinge portion 21, and the first limiting groove 32 is arranged on the side of the second mounting portion 22 close to the first hinge portion 11. The first limiting protrusion 31 and the first limiting groove 32 cooperate to limit the maximum opening angle of the door body of the opening and closing device.

[0075] The first limiting protrusion 31 is in a block structure rather than a long strip structure, which can ensure that the hinge mechanism cannot fail within a certain door opening force range, and can fail but cannot be broken within a certain door opening force range. For example, when the design requires a force of 0-80N to push the door, the hinge mechanism cannot fail, so the first limiting protrusion 31 and the first limiting groove 32 are arranged to limit. When the design requires a force greater than 80N to push the door, the hinge can fail, but cannot be broken, and the first limiting protrusion is broken at a force of about 80N. In this way, when a larger force is used to push the door, the hinge will not be broken, but only the hinge mechanism will be excessively failed.

[0076] Referring to Figures 1a to 1b , Figures 3a-3b , Figures 4a-4bAs shown in the figure, in one disclosed embodiment, the hinge mechanism further comprises a piston 40, a resilient member 50, and a connecting shaft 60. The first hinge part 11 is provided with a first matching structure 113, and the second hinge part 21 is provided with a second accommodating cavity 211 and a second opening 212. The piston 40 is arranged in the second accommodating cavity 211, and the piston 40 is provided with a second matching structure 41 which abuts against the first matching structure 113 through the second opening 212, and the first hinge seat 10 and the second hinge seat 20 can relatively reciprocate in the abutting state. The resilient member 50 is arranged in the second accommodating cavity 211 and located at one end of the piston 40 away from the second matching structure 41. The resilient member 50 can provide assistance for the abutting state. The connecting shaft 60 penetrates the first hinge part 11, the piston 40, the resilient member 50, and the second hinge part 21, so that the first hinge part 11 and the second hinge part 21 are relatively fixed in the axial direction.

[0077] Referring to Figures 1a to 1b , Figures 3a-3b , Figures 4a-4b As shown in the figure, exemplarily, the first hinge part 11 is provided with a first accommodating cavity 111 which is provided with a first opening 112, the first opening 112 is arranged opposite to and in communication with the second opening 212, and the first matching structure is arranged in the first accommodating cavity 111. One end of the first hinge part 11 provided with the first opening 112 is connected to one end of the second hinge part 21 provided with the second opening 212.

[0078] The hinge mechanism of the embodiment of the present disclosure can alleviate the problem of violent collision between the door body and the cabinet caused by the rapid descent of the door body in the process of closing the door body, and improve the user experience, because the resilient member 50 can provide assistance for the abutting state. Meanwhile, the piston 40 and the resilient member 50 are arranged in the second accommodating cavity 211 of the second hinge seat 20. The first hinge seat 10, the second hinge seat 20, the piston 40, and the resilient member 50 can be assembled and connected through the connecting shaft 60, so that the hinge mechanism is simple and convenient to assemble, and the space occupied by the hinge mechanism is reduced.

[0079] The abutting faces between the first matching structure 113 and the second matching structure 41 are provided with a first limiting structure 80, and the first limiting structure 80 comprises a first limiting part 81 located on the first matching structure 113 and a second limiting part 82 located on the second matching structure 41. When the hinge mechanism is in the initial state, the first limiting part 81 and the second limiting part 82 are limited and matched.

[0080] Exemplarily, when the hinge mechanism is in the initial state, the first limiting part 81 and the second limiting part 82 are in limiting cooperation so that the hinge mechanism is positioned to the initial state, so that the initial state of the hinge mechanism will not change due to transportation or other external forces. For example, when the included angle between the first hinged seat 10 and the second hinged seat 20 is less than 180°, the first limiting part 81 and the second limiting part 82 are in limiting cooperation, for example, the included angle between the first hinged seat and the second hinged seat is 175°, and the first limiting part 81 and the second limiting part 82 are in limiting cooperation. When the hinge mechanism is actually assembled on the box body of the opening and closing device, the included angle between the first hinged seat and the second hinged seat is greater than 180° when the door body is normally used, and the first limiting part 81 and the second limiting part 82 are in a dislocation state when normally used, so that the first limiting part 81 and the second limiting part 82 almost do not play a role, thereby avoiding affecting the normal use of the hinge mechanism.

[0081] The hinge mechanism of the embodiment of the present disclosure realizes the initial state positioning of the hinge mechanism by arranging the first limiting structure 80 between the abutting surfaces of the first cooperation structure 113 and the second cooperation structure 41, so that the structure strength of the second hinged seat is reduced due to the falling of the protrusion is avoided, and the first limiting structure 80 is hidden between the abutting surfaces of the first cooperation structure 113 and the second cooperation structure 41, avoiding affecting the overall appearance of the hinge mechanism.

[0082] Referring to Figures 3a-3b , Figures 4a-4b In an embodiment, the second cooperation structure 41 includes a first helical surface 42 and a first top surface 43, the first cooperation structure 113 includes a first cooperation surface 114 and a second top surface 115, one end of the first top surface 43 is connected with the top end of the first helical surface 42, the first helical surface 42 and the first cooperation surface 114 are matched, and the first top surface 115 and the second top surface 115 correspond to each other. The first limiting part 81 is arranged on the second top surface 115, and the second limiting part 82 is arranged on the first top surface 43. When the hinge mechanism is in the open state, the first helical surface 42 and the first cooperation surface 114 abut.

[0083] The hinge mechanism of the embodiment of the present disclosure, the first helical surface 42 is used to support the door body to reach a balanced state when the door is opened, so that the door body realizes a hovering effect. The first top surface 43 is provided with the second limiting part 82, and the second top surface 115 is provided with the first limiting part 81. The first top surface 43 and the second top surface 115 cooperate to limit the relative position of the first hinged seat 10 and the second hinged seat 20 before the hinge mechanism is installed and used, so as to prevent the hinge mechanism from being accidentally opened during storage and transportation.

[0084] Referring to Figures 3a-3b , Figures 4a-4bAs shown, the first limiting part 81 is a protruding part, and the second limiting part 82 is a recessed part matched with the protruding part. Alternatively, the first limiting part 81 is a recessed part, and the second limiting part 82 is a protruding part matched with the recessed part. It should be noted that the specific shape and size of the protruding part and the recessed part are not limited here, as long as they can meet the initial state of the limiting and matching hinge mechanism.

[0085] As shown, the cross-sectional shape of the recessed part is approximately circular, and the cross-sectional shape of the protruding part is approximately circular. The diameter of the recessed part is greater than or equal to the diameter of the protruding part. With such a setting, the protruding part can be more conveniently fitted into the recessed part, the assembly of the piston is easier, the fault tolerance is higher, and the effect is better.

[0086] Referring to Figures 3a-3b , Figures 4a-4b As shown, in an embodiment, the side wall of the piston 40 is provided with an axially extending guide groove 44, and the side wall of the second accommodating cavity 211 is provided with a corresponding guide protrusion 213. The guide protrusion 213 is arranged in the guide groove 44. When the opening and closing device is at the maximum opening angle, the guide protrusion 213 abuts against the limiting protrusion 115, which can assist in limiting the maximum angle of the opening door.

[0087] In an embodiment, the hinge mechanism further comprises a fastener connected to both ends of the connecting shaft 60 to axially fix the first hinge seat 10 and the second hinge seat 20 relative to each other.

[0088] Referring to Figure 1b and 1c As shown, in an embodiment, the hinge mechanism further comprises a gasket 70, the center of the gasket 70 has a non-circular hole 71, and the end of the connecting shaft 60 penetrates into the non-circular hole 71 and is riveted with the gasket 70.

[0089] Referring to Figure 1b and 1c As shown, the center of the gasket 70 has a polygonal hole, and the end of the connecting shaft 60 penetrates into the polygonal hole and is riveted with the gasket. For example, the polygonal hole of the gasket 70 is a regular hexagon. With such a setting, when the connecting shaft 60 is riveted with the gasket 70, the relative fixation of the gasket 70 and the connecting shaft 60 can be ensured, which plays a limiting role and avoids damage. Because the relative rotation of the connecting shaft 60 and the gasket 70 causes continuous friction, it may cause strength problems, such as grinding the riveted part, thereby affecting the strength of the hinge mechanism, and the embodiment of the present disclosure sets the non-circular hole as a polygonal hole to avoid damage.

[0090] Referring to Figure 4bAs shown in the disclosed embodiment, the piston 40 is provided with weight-reducing holes 45. The number of weight-reducing holes 45 can be one or more, and the plurality of weight-reducing holes 45 are arranged in a circumferential direction based on the central axis of the piston 40 itself. Such an arrangement can reduce the weight of the piston 40 and the hinge mechanism, and avoid injection molding defects when the piston 40 is injection molded as a solid.

[0091] Referring to Figure 1e , Figure 4a and Figure 4b As shown in the disclosed embodiment, the bottom end of the piston 40 is centrally provided with a first positioning protrusion 46 for positioning the elastic member 50. The bottom end of the second accommodating cavity 211 is centrally provided with a second positioning protrusion 214 for positioning the elastic member 50.

[0092] The hinge mechanism of the disclosed embodiment can prevent the elastic member 50 from shaking and reduce the wear of the elastic member 50 by positioning the elastic member 50 through the first positioning protrusion 46 and the second positioning protrusion 214. Moreover, in the case where the fastener corresponding to the end portion of the connecting shaft at the bottom end of the second hinge seat 20 is provided with a counterbore, the second positioning protrusion 214 can also serve to improve the structural strength of the second hinge seat 20.

[0093] Referring to Figures 1a-1h The disclosed embodiment also provides an opening and closing device, which comprises a device body 200 and a door body. The device body 200 is provided with a third opening, and the outer side wall of the device body 200 is provided with a mounting cavity 201 recessed towards the inside of the device body, and the mounting cavity 201 is provided with a fourth opening 202 towards the outside of the device body 200. The door body is connected to the third opening of the device body 200 in an openable and closable manner through the hinge mechanism 100 of any one of the disclosed embodiments. The first hinge seat 10 is connected to the side wall of the door body, the second hinge portion 21 is at least partially located in the mounting cavity 201, and the second mounting portion 22 is embedded in the mounting cavity 201.

[0094] The second mounting portion 22 can also be embedded in the mounting cavity 201 of the opening and closing device body 200 according to the disclosed embodiment, and the mounting cavity 201 can further serve to limit the second mounting portion 22, so that the hinge mechanism no longer tilts backward after being stressed, achieving an anti-backward tilting effect, improving the stability and reliability of the hinge mechanism, and preventing the hinge mechanism from loosening after long-term use. The side-arranged elastic sheet structure can improve the reliability of the plug-in connection.

[0095] Exemplarily, the second mounting portion 22 is fixedly connected with the device body 200 by fasteners passing through the second mounting holes, so as to ensure the stability of the connection between the second hinge seat 20 and the opening and closing device body. Exemplarily, the second mounting portion 22 can also be fixedly connected with the device body 200 by the elastic sheet structure 90. In this way, the user can freely switch between screw fixation and screwless fixation. For example, for an opening and closing device with a heavy door body, such as an opening and closing device with a glass door, the screwless fixation scheme may not be stable enough, so that screw fixation or screw and elastic sheet structure cooperation fixation can be used to enhance the stability. For a door body with a lighter door body, a screwless scheme can be used to further reduce the cost and improve the production efficiency.

[0096] Exemplarily, the opening and closing device can be a refrigerator, for example, the opening and closing device can be an upper door opening horizontal refrigerator, or the opening and closing device can also be other devices capable of being opened and closed, such as a dishwasher or a storage cabinet, etc.

[0097] Referring to FIG. 1, Figure 1f , Figure 1g Exemplarily, the mounting cavity 201 includes a first cavity and a second cavity, and the first cavity and the second cavity are respectively arranged in communication with the outer side wall of the device body. The first cavity and the second cavity are arranged along the hinge mechanism axis direction and are arranged in communication. The first hinge portion 11 is mounted through the first cavity, and the first hinge portion 11 is partially located in the first cavity and partially extends out of the first cavity. The second mounting portion 22 is located in the second cavity, and the second hinge portion 21 is at least partially located in the second cavity.

[0098] Referring to FIG. 1, Figure 1b Exemplarily, in one disclosed embodiment, the mounting cavity 201 includes a first part and a second part, and the second part is located at the lower end of the first part. The second hinge portion 21 is at least partially located in the first part, and the second mounting portion 22 is clamped in the second part.

[0099] Referring to FIG. 1, Figures 1f-1h Exemplarily, the device body 200 includes a mouth frame portion 200a, and the mouth frame portion 200a is provided with the mounting cavity 201. The mouth frame portion 200a located at the bottom of the mounting cavity 201 is provided with a second accommodating portion 203, and the second accommodating portion 203 is arranged close to the front side wall 2011.

[0100] Exemplarily, the mouth frame portion 200a can be detachably mounted on the device body 200, or the mouth frame portion 200a can be integrally formed with the device body. The mouth frame portion 200a is provided with the mounting cavity 201, and the mounting cavity 201 can cooperate with the second mounting portion 22, that is, the second mounting portion 22 can be embedded in the mounting cavity 201.

[0101] For example, the spring sheet structure 90 is disposed on the side of the second mounting part 22, and a first snap-fit ​​groove 204 is provided on the inner side wall of the mounting cavity 201. The spring sheet structure 90 is adapted to the first snap-fit ​​groove 204 to fix the second mounting part 22.

[0102] For example, the outer wall of the device body 200 is provided with a clearance hole (such as...). Figure 1a , Figure 1b The clearance hole is integrally formed with the first latching groove 204. The clearance hole is the same size as the first latching groove 204, meaning the first latching groove 204 passes through the outer wall of the main body 200 of the device. The clearance hole allows tools to easily reach into the first latching groove 204, facilitating the removal of the spring clip structure 90 from the first latching groove 204, thereby facilitating the disassembly of the hinge. For example, Figure 1a There are two clearance holes, which correspond to two spring sheet structures 90 respectively. This allows the spring sheet structure to be directly pushed from the first snap-fit ​​groove 204 into the mounting cavity after being inserted through the clearance hole, thus facilitating the upward removal of the second mounting part 22.

[0103] Reference Figures 5a to 5d As shown, the mounting cavity 201 includes a first part 201a and a second part 201b. The second part 201b is located at the lower end of the first part 201a. The first part 201a includes a first sidewall B1 and a second sidewall B2. The second sidewall B2 is disposed near the first hinge portion 10. The first sidewall B1 and the second sidewall B2 are inclined relative to each other in the vertical direction. The two sides of the second hinge seat 20 are respectively provided with a first wedge portion 24 and a second wedge portion 25. The first wedge portion 24 is fitted and assembled with the first sidewall B1, and the second wedge portion 25 is fitted and assembled with the second sidewall B2.

[0104] For example, the first sidewall B1 and the second sidewall B2 represent the left and right sides of the first part. Figure 5a The side walls on both sides (left and right) are arranged with the first side wall B1 inclined relative to the vertical direction. The distance between the outer end of the first side wall B1 and the first hinge is smaller than the distance between the inner end of the second side wall and the first hinge. The inclination angle of the first side wall B1 is not limited here and can be set according to actual use needs.

[0105] For example, the second sidewall B2 is inclined relative to the vertical direction, and the distance between the outer end of the second sidewall B2 and the center of the mounting cavity is less than the distance between the inner end of the second sidewall B2 and the center of the mounting cavity. The inclination angle of the second sidewall B2 is not limited here. The first sidewall B1 and the second sidewall B2 together form a figure-eight shape.

[0106] When the side wall of the mouth frame of the device body 200 is vertical, the stress of the mouth frame of the device body 200 is borne by the edge part of the opening protruding on the front face when the door body is opened or the hinge mechanism strength test is performed, which may have an influence on the strength of the hinge mechanism. The first wedge-shaped part 24 cooperates with the inclined surface of the first side wall B1, and the second wedge-shaped part 25 cooperates with the inclined surface of the second side wall B2, so that the mouth frame part can increase two stress points, thereby further increasing the overall strength.

[0107] The above detailed description is a specific description of the feasible embodiments of the present disclosure, which is not used to limit the protection scope of the present disclosure. Any equivalent implementation or change without departing from the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A hinge mechanism, characterized by Comprising The 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, and the second mounting part is used for mounting the second hinge seat in a mounting cavity of a main body of the opening and closing device; the mounting cavity comprises a front side wall and inner side walls located on both sides of the front side wall; the second mounting part is provided with a spring structure on a side surface close to the inner side wall, and a containing groove is arranged on the side surface of the second mounting part. The spring structure is arranged in an extending manner along the height direction of the second mounting part, and comprises a fixed end and a free end; in an initial state, the free end at least partially protrudes from the side surface; and in a compressed state, the free end is elastically compressed to be close to the containing groove.

2. The hinge mechanism of claim 1, wherein, The spring structure is integrally formed with the second mounting part; and / or, the spring structure is arranged in an inclined manner, and the height and width of the spring structure are smaller than the height and width of the containing groove; and / or, an outer side of the free end is provided with a positioning part matched with the inner side wall.

3. The hinge mechanism of claim 1, wherein, The second mounting part is provided with a first accommodation part at a position close to the bottom of the front side wall, and the front side wall is provided with a first matching part matched with the first accommodation part.

4. The hinge mechanism of claim 1, wherein, The thickness of the second mounting part is smaller than the diameter of the second hinge part, and the difference between the back surfaces of the second mounting part and the second hinge part is smaller than or equal to a preset value.

5. The hinge mechanism of claim 4, wherein, The back surface of the second mounting part is flat, and the back surface of the second mounting part is matched with the inner side wall of the mounting cavity; and / or, the thickness of the second mounting part gradually increases from one end of the second mounting part away from the second hinge part to one end of the second mounting part close to the second hinge part; and / or, the second mounting part further comprises a front surface, the front surface is arranged opposite to the back surface of the second mounting part, and the front surface and the back surface of the second mounting part are arranged at an acute angle.

6. The hinge mechanism of claim 4, wherein, The thickness of the second mounting part is 10mm-14mm; and / or, the sum of the heights of the back surface of the second mounting part and the back surface of the second hinge part is smaller than 40mm.

7. The hinge mechanism of claim 1, wherein, The first hinge seat further comprises a first mounting part, and in a closed state of the opening and closing device, the second mounting part is arranged on one side of the back surface of the second hinge part close to the mounting cavity, and the first mounting part is arranged on one side of the back surface of the first hinge part away from the mounting cavity.

8. The hinge mechanism of claim 1, wherein, The first hinge seat further comprises a first mounting part, and a first mounting hole is arranged on the first mounting part; the first mounting hole is used for cooperating with a fastener to fix the first mounting part on a door body of the opening and closing device; and / or, The first hinge seat further comprises a first mounting part, and the first mounting part is integrally formed with the first hinge part; and / or, the second mounting part and the second hinge part are integrally formed; and / or, The first hinge seat further comprises a first mounting part, and a first reinforcing rib is arranged on the first mounting part, and a second reinforcing rib is arranged on the second mounting part.

9. The hinge mechanism of claim 8, wherein, The hinge mechanism further comprises a second limiting structure, the second limiting structure comprises a first limiting protrusion and a first limiting groove, the first limiting protrusion is arranged on one side of the first mounting portion close to the second hinge portion, and the first limiting groove is arranged on one side of the second mounting portion close to the first hinge portion; when the door body of the opening and closing device is at the maximum opening and closing angle, the limiting protrusion is at least partially clamped and pressed in the limiting groove.

10. The hinge mechanism according to any one of claims 1 to 9, characterized in that The hinge mechanism further comprises: a piston, the first hinge portion is provided with a first matching structure, the second hinge portion is provided with a second accommodating cavity and a second opening, the piston is located in the second accommodating cavity, and the piston is provided with a second matching structure which abuts against the first matching structure through the second opening; a resilient member, the resilient member is located in the second accommodating cavity and at one end of the piston away from the second matching structure, and the resilient member can provide assistance for the abutting state; a connecting shaft, the connecting shaft penetrates through the first hinge portion, the piston, the resilient member and the second hinge portion, so that the first hinge portion and the second hinge portion are relatively fixed in the axial direction.

11. The hinge mechanism of claim 10, wherein, The abutting faces of the first matching structure and the second matching structure are provided with a first limiting structure, the first limiting structure comprises a first limiting portion on the first matching structure and a second limiting portion on the second matching structure, the first limiting portion and the second limiting portion are limitedly matched when the hinge mechanism is in an initial state; the first limiting portion is a protrusion portion, and the second limiting portion is a recess portion matched with the protrusion portion, or the first limiting portion is a recess portion, and the second limiting portion is a protrusion portion matched with the recess portion; the diameter of the recess portion is greater than or equal to the diameter of the protrusion portion.

12. The hinge mechanism of claim 11, wherein, The second matching structure comprises a first helical face and a first top face, the first matching structure comprises a first matching face and a second top face, one end of the first top face is connected with the top end of the first helical face, the first helical face and the first matching face are matched, the first top face and the second top face correspond to each other, the first limiting portion is arranged on the second top face, and the second limiting portion is arranged on the first top face; when the hinge mechanism is in an open state, the first helical face and the first matching face abut against each other.

13. An opening and closing device characterized by comprising: The opening and closing device comprises: a device body, the device body is provided with a third opening, and an outer side wall of the device body is provided with a mounting cavity recessed towards the inside of the device body, and the mounting cavity is provided with a fourth opening towards the outside of the device body; a door body, the door body is connected to the third opening of the device body in an openable and closable manner through the hinge mechanism, the first hinge seat is connected to the side wall of the door body, the second hinge portion is at least partially located in the mounting cavity, and the second mounting portion is embedded in the mounting cavity.

14. The opening and closing device according to claim 13, characterized in that A first clamping groove is recessed in the inner side wall of the mounting cavity, and the resilient sheet structure is matched with the first clamping groove to fix the second mounting portion.

15. The opening and closing device according to claim 14, characterized in that The device body comprises a mouth frame part provided with the mounting cavity, the bottom of which is provided with a second accommodating part, which is arranged close to the front side wall, and the outer side wall of the device body is provided with an accommodating hole, which is arranged through the first clamping groove.

16. The opening and closing device according to claim 13, characterized in that The mounting cavity comprises a first part and a second part, the second part being arranged at the lower end of the first part, the first part comprising a first side wall and a second side wall, the second side wall being arranged close to the first hinge part, the first side wall and the second side wall being arranged obliquely to the vertical direction, the two sides of the second hinge seat being respectively provided with a first wedge-shaped part and a second wedge-shaped part, the first wedge-shaped part being fitted with the first side wall, and the second wedge-shaped part being fitted with the second side wall.

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