Hinge device with power-assisted folding mechanism and refrigeration equipment

Abstract

The utility model provides a hinge device with a power-assisted folding mechanism and refrigeration equipment, and the hinge device comprises a fixed hinge piece used for being fixed on a box body, a movable hinge piece used for being fixed on a door body, and a connecting rod assembly for movably connecting the movable hinge piece to the fixed hinge piece, the connecting rod assembly has a folded state and an unfolded state; the hinge device further comprises a power-assisted folding mechanism used for keeping the connecting rod assembly in a folded state. The door body can be kept in a closed state, and the situation of cold leakage caused by untight closing of the door body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, and in particular to a hinge device with a power-assisted folding mechanism and refrigeration equipment with the hinge device. Background Art

[0002] With the development of society and the gradual improvement of the quality of life, people's demand for the aesthetics of refrigeration equipment has become increasingly prominent. It has become popular to embed refrigeration equipment into external environmental parts, such as cabinets, walls, etc., that is, to form embedded refrigeration equipment to achieve a unified home decoration style.

[0003] Some existing refrigeration equipment uses a hinge device with a connecting rod assembly to movably connect the door body to the box body. When the door body is opened relative to the box body, the connecting rod assembly is unfolded. Driven by the connecting rod assembly, the door body rotates and translates along a preset trajectory. The structure is simple and can avoid interference between the door body and external environmental parts. However, the connecting rods in the connecting rod assembly are mutually rotatably connected, which is unstable and easily causes the door body to be loosely closed, resulting in cold leakage, which affects the user experience. Utility Model Content

[0004] The utility model provides a hinge device with a power-assisted folding mechanism and a refrigeration device with the hinge device.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows: a hinge device with a power-assisted folding mechanism, including a fixed hinge part fixed to a box body, a movable hinge part fixed to a door body, and a connecting rod assembly that movably connects the movable hinge part to the fixed hinge part, and the connecting rod assembly has a folded state and an unfolded state; the hinge device also includes a power-assisted folding mechanism for keeping the connecting rod assembly in a folded state.

[0006] As a further improvement of the present invention, the side on which the movable hinge and the fixed hinge rotate relative to each other is the rotating side, the fixed hinge has a first hinge point and a second hinge point located on the side of the first hinge point away from the rotating side, the movable hinge includes a third hinge point and a fourth hinge point located on the side of the third hinge point away from the rotating side; the connecting rod assembly includes a first connecting rod hinged at the first hinge point, a second connecting rod hinged at the second hinge point, a third connecting rod hinged at the third hinge point, and a fourth connecting rod hinged at the fourth hinge point, the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod are hinged to each other, and when the connecting rod assembly moves from the unfolded state to the folded state, the ends of the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod away from the rotating side all move in a direction away from the rotating side; the auxiliary folding mechanism includes a hook provided on one of the fixed hinge and the second connecting rod, and a block provided on the other.

[0007] As a further improvement of the present invention, the hook is arranged at an end of the fixed hinge away from the rotating side, and the block is fixed to an end of the second connecting rod away from the second hinge point.

[0008] As a further improvement of the present invention, the hook is rotatably connected to the fixed hinge member along a horizontal direction; the hinge device also includes a first limiting structure arranged between the fixed hinge member and the hook, and the first limiting structure is used to limit the rotation of the hook relative to the fixed hinge member.

[0009] As a further improvement of the present invention, the second connecting rod has a hinge axis at one end away from the second hinge point, and the second connecting rod and the fourth connecting rod are hinged to the hinge axis; the clamping block is sleeved on the hinge axis, and the hinge device also includes a second limiting structure arranged between the clamping block and the second connecting rod, and the second limiting structure is used to limit the rotation of the clamping block around the hinge axis.

[0010] As a further improvement of the present invention, the second connecting rod includes two first plates arranged at intervals in the vertical direction and a second plate connecting the two first plates at one end away from the movable hinge; the second limiting structure is an L-shaped abutting groove arranged on the side of the block facing the second plate, and the L-shaped abutting groove abuts against the end face of the second plate and the wall surface of the second plate facing the movable hinge.

[0011] As a further improvement of the present invention, the side of the movable hinge member rotating relative to the fixed hinge member is the rotating side, the fixed hinge member has a first hinge point, a second hinge point located on the side of the first hinge point away from the rotating side, the movable hinge member includes a third hinge point, and a fourth hinge point located on the side of the third hinge point away from the rotating side; the connecting rod assembly includes a first connecting rod hinged at the first hinge point, a second connecting rod hinged at the second hinge point, a third connecting rod hinged at the third hinge point, and a fourth connecting rod hinged at the fourth hinge point, and an end of the second connecting rod away from the second hinge point and an end of the fourth connecting rod away from the fourth hinge point are hinged at a fifth hinge point; the power folding mechanism includes:

[0012] A guide plate, the guide plate is fixed to one end of the second connecting rod close to the fifth hinge point, and the outer edge profile of the guide plate has a limiting recess;

[0013] An elastic component includes a seat body connected to the fourth connecting rod, an elastic member fixed to the seat body and protruding toward the fifth hinge point, and a push block connected to the elastic member and abutting against the outer edge contour of the guide plate. After the connecting rod assembly switches from the unfolded state to the folded state, the push block is limited to the limiting recess.

[0014] As a further improvement of the present invention, the outer edge profile of the guide plate has a guiding slope connected to one end of the limiting recess close to the movable hinge, and the guiding slope extends obliquely toward the fifth hinge point along the direction close to the limiting recess.

[0015] As a further improvement of the present invention, a guide groove extending along the length direction of the fourth connecting rod is provided through a position on the fourth connecting rod corresponding to the push block, and the push block is convexly provided with a limit block matching with the guide groove.

[0016] As a further improvement of the utility model, the base body is penetrated by a first fixing hole, the fourth connecting rod is penetrated by a second fixing hole corresponding to the first fixing hole, and the hinge device also includes a fastener for simultaneously inserting the second fixing hole and the second fixing hole.

[0017] As a further improvement of the present invention, the seat body includes a seat body, a fixed shaft connected to the seat body and protruding toward the fifth hinge point, the push block is recessed with a fixed shaft hole on the side facing the seat body, the fixed shaft is movably connected in the fixed shaft hole along its axial direction, the elastic member is a spring sleeved on the fixed shaft, and one end of the spring is against the seat body, and the other end is against the bottom wall of the fixed shaft hole.

[0018] As a further improvement of the present invention, the push block has a rolling element, and the rolling element abuts against the outer edge contour of the guide plate.

[0019] As a further improvement of the present invention, the fixed hinge member includes a first hinge plate for connecting the connecting rod assembly, the first hinge plate is perpendicular to the plane where the opening side of the box is located, the first hinge point and the second hinge point are both arranged on the first hinge plate, the direction within the plane where the first hinge plate is located and parallel to the plane where the opening side of the box is located is the transverse direction, and the direction within the plane where the first hinge plate is located and perpendicular to the transverse direction is the longitudinal direction, and the transverse distance between the first hinge point and the second hinge point in the transverse direction is greater than the longitudinal distance in the longitudinal direction.

[0020] As a further improvement of the present invention, the first hinged plate has a fixed rotating end located on the rotating side, the distance between the first hinge point and the fixed rotating end is smaller than the distance between the second hinge point and the fixed rotating end, and the distance between the first hinge point and the first fixed plate is greater than the distance between the second hinge point and the first fixed plate.

[0021] As a further improvement of the present invention, one end of the second link away from the second hinge point and one end of the fourth link away from the fourth hinge point are hinged at the fifth hinge point; one end of the third link away from the third hinge point is hinged to the sixth hinge point on the second link located between the second hinge point and the fifth hinge point, and one end of the first link away from the first hinge point is hinged to the seventh hinge point on the third link located between the third hinge point and the sixth hinge point.

[0022] As a further improvement of the present invention, when the connecting rod assembly is in a folded state and an unfolded state, the quadrilateral formed by the lines connecting the first hinge point and the second hinge point, the line connecting the second hinge point and the sixth hinge point, the line connecting the sixth hinge point and the seventh hinge point, and the line connecting the seventh hinge point and the first hinge point is a convex quadrilateral.

[0023] As a further improvement of the present invention, the fixed hinge comprises a first fixed plate for fixing to the box body, a first hinge plate connected to the first fixed plate and used to connect the connecting rod assembly, and the first hinge point and the second hinge point are both arranged on the first hinge plate; when the connecting rod assembly is in a folded state, the third hinge point and the fourth hinge point are both located on the side of the first hinge point and the second hinge point away from the first fixed plate.

[0024] In order to achieve the purpose of the above utility model, the utility model also provides a refrigeration device, including a box body, a door body for opening or closing the box body, and the above hinge device with power-assisted folding mechanism.

[0025] Compared with the prior art, the beneficial effect of the present invention is that the hinge device in the present invention can keep the door body in a closed state by providing an auxiliary folding mechanism for keeping the connecting rod assembly in a folded state, thereby avoiding the situation where the door body is not closed tightly and causes cold leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a refrigeration device having a hinge device in the first embodiment of the utility model;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of a hinge device in a refrigeration device shown (the door body is in a closed state);

[0028] Figure 3 yes Figure 2 Exploded view in ;

[0029] Figure 4 yes Figure 2 An exploded view of the fixed hinge member in FIG.

[0030] Figure 5 yes Figure 2 A schematic diagram of the structure of the second connecting rod in FIG.

[0031] Figure 6 yes Figure 5 An exploded view of the second connecting rod in FIG.

[0032] Figure 7 yes Figure 2 A schematic diagram of the structure of the hinge device after the movable hinge is opened to 90°;

[0033] Figure 8 yes Figure 2 A schematic diagram of the structure of the hinge device after the movable hinge is opened to the maximum opening angle;

[0034] Fig. 9 is a schematic structural diagram of a hinge device in a second embodiment of the present utility model;

[0035] Fig.10 yes Fig. 9 Exploded view of the hinge assembly shown. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the attached specific implementation of the present invention. Figure 1-10, clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementation. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0037] The words expressing position and direction described in this utility model are as follows: when the refrigerator is in normal use, the direction from the cabinet to the door is the "front", and the direction opposite to the "front" is the "rear", and the "rear" refers to the direction from the door to the cabinet. The terms first, second, third, fourth, etc. in this utility model are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; in addition, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, the connection can be a direct connection or an indirect connection through an intermediate medium, and can be a fixed connection, a movable connection, a detachable connection, or an integrated connection. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0038] The utility model provides a hinge device 3 and a refrigeration device 100 having the hinge device 3. Figure 1 A partial schematic diagram of a refrigeration device 100 having a hinge device 3 in the first embodiment of the utility model being embedded in a cabinet 200 is shown, wherein only the cabinet 200 located on one side is shown. It is known that in actual installation, the refrigeration device 100 is completely embedded in the cabinet 200. Of course, it is understandable that the refrigeration device 100 does not necessarily have to be embedded in the cabinet 200, but can also be embedded in the wall, or used alone.

[0039] At the same time, it can be understood that the hinge device 3 in the present invention is not limited to the refrigeration device 100, but can also be applied to other household appliances such as microwave ovens or other furniture such as cabinets 200.

[0040] In a specific implementation, the refrigeration device 100 is a vertical refrigerator, but the invention is not limited thereto.

[0041] Specifically, the refrigeration device 100 includes a box body 1 with an opening, a door body 2 for opening or closing the opening, and a hinge device 3 connected between the box body 1 and the door body 2. The hinge device 3 is used to movably connect the door body 2 to the opening side of the box body 1, so that the door body 2 can be switched between a closed state and an open state, and the door body 2 can be translated along a preset trajectory while rotating, so as to avoid interference between the door body 2 and the cabinet 200.

[0042] Combination Figure 2 to Figure 8 As shown, the hinge device 3 includes a fixed hinge 31 fixed to the box body 1, a movable hinge 32 fixed to the door body 2, and a connecting rod assembly 33 that movably connects the movable hinge 32 to the fixed hinge 31. The connecting rod assembly 33 has a folded state and an unfolded state. When the connecting rod assembly 33 is in the folded state, the door body 2 is in a closed state; when the connecting rod assembly 33 is in the unfolded state, the door body 2 is in an open state.

[0043] It is known that the movable hinge 32 moves synchronously with the door body 2. When the door body 2 is in a closed state, that is, the movable hinge 32 is in a closed state, the connecting rod assembly 33 is in a folded state, at which time the movable hinge 32 is close to the fixed hinge 31, and the movable hinge 32 is substantially parallel to the fixed hinge 31. When the door body 2 is in an open state, that is, the movable hinge 32 is in an open state, the connecting rod assembly 33 is in an unfolded state, at which time the movable hinge 32 is away from the fixed hinge 31, and an angle is formed between the movable hinge 32 and the fixed hinge 31.

[0044] Furthermore, the hinge device 3 also includes a power-assisted folding mechanism 36 for keeping the connecting rod assembly 33 in a folded state, so as to keep the door body 2 in a closed state, avoid the door body 2 from being loosely closed, and avoid cold leakage.

[0045] Specifically, the side where the movable hinge 32 rotates relative to the fixed hinge 31 is the rotating side. It is known that the end where the door body 2 rotates relative to the box body 1 is the rotating end, and the rotating side refers to the side of the hinge device 3 facing the rotating end.

[0046] The fixed hinge 31 has a first hinge point A and a second hinge point B located on a side of the first hinge point A away from the rotating side. The movable hinge 32 includes a third hinge point C and a fourth hinge point D located on a side of the third hinge point C away from the rotating side.

[0047] The fixed hinge 31 includes a first fixed plate 311 for fixing to the box body 1, and a first hinge plate 312 connected to the first fixed plate 311 and used to connect the connecting rod assembly 33. In a specific embodiment, the first fixed plate 311 is perpendicular to the first hinge plate 312, and the first hinge plate 312 is perpendicular to the plane where the opening side of the box body 1 is located. At this time, the first fixed plate 311 is used to fix to the plane where the opening side of the box body 1 is located, and the plane where the first fixed plate 311 is located is parallel to the plane where the opening side of the box body 1 is located. Of course, it is not limited to this. In other embodiments, the first fixed plate 311 can also be located in the same plane as the first hinge plate 312, that is, the fixed hinge 31 is in the shape of a flat plate as a whole. At this time, the first fixed plate 311 is used to fix to the upper end surface or the lower end surface of the box body 1.

[0048] Specifically, the first hinge point A and the second hinge point B are both disposed on the first hinge plate 312. Moreover, the first hinge plate 312 has a fixed rotating end P1 located at the rotating side, and the second hinge point B is located at a side of the first hinge point A away from the fixed rotating end P1.

[0049] The movable hinge 32 includes a second fixing plate 321 fixed to the door body 2 and a second hinge plate 322 connected to the second fixing plate 321. In a specific embodiment, the second hinge plate 322 is perpendicular to the second fixing plate 321. Of course, this is not limited thereto.

[0050] Specifically, the third hinge point C and the fourth hinge point D are both disposed on the second hinge plate 322. The movable hinge member 32 has an active rotating end P2 located at the rotating side, and the fourth hinge point D is located on a side of the third hinge point C away from the active rotating end P2.

[0051] Furthermore, the connecting rod assembly 33 includes a first connecting rod 331 having one end hinged at a first hinge point A, a second connecting rod 332 having one end hinged at a second hinge point B, a third connecting rod 333 having one end hinged at a third hinge point C, and a fourth connecting rod 334 having one end hinged at a fourth hinge point D. The first connecting rod 331, the second connecting rod 332, the third connecting rod 333, and the fourth connecting rod 334 are hinged to each other. When the connecting rod assembly 33 moves from the unfolded state to the folded state, the ends of the first connecting rod 331, the second connecting rod 332, the third connecting rod 333, and the fourth connecting rod 334 away from the rotating side all move in a direction away from the rotating side.

[0052] In a specific embodiment, one end of the second link 332 away from the second hinge point B and one end of the fourth link 334 away from the fourth hinge point D are hinged at a fifth hinge point E. One end of the third link 333 away from the third hinge point C is hinged at a sixth hinge point F located at the second link 332, and the sixth hinge point F is located between the second hinge point B and the fifth hinge point E. One end of the first link 331 away from the first hinge point A is hinged at a seventh hinge point G located at the third link 333, and the seventh hinge point G is located between the third hinge point C and the sixth hinge point F. Of course, this is not limited to this. In other embodiments, the connection method between the various connecting rods can also be set to that the end of the second connecting rod 332 away from the second hinge point B is hinged to the end of the fourth connecting rod 334 away from the fourth hinge point D, the end of the first connecting rod 331 away from the first hinge point A is hinged to the middle section of the fourth connecting rod 334, and the end of the third connecting rod 333 away from the third hinge point C is hinged to the middle section of the first connecting rod 331. The connection position and connection relationship between the rods can be adjusted according to specific trajectory requirements.

[0053] Combination Figure 2 to Figure 6 As shown, the power folding mechanism 36 in the hinge device 3 in the first embodiment of the utility model includes a hook 361 provided on one of the fixed hinge member 31 and the second connecting rod 332, and a block 362 provided on the other. After the door body 2 is rotated and closed until the hook 361 hooks the block 362, the connecting rod assembly 33 is kept in the folded state to keep the door body 2 in the closed state, thereby preventing the door body 2 from being loosely closed.

[0054] In a specific embodiment, the hook 361 is disposed at an end of the fixed hinge 31 away from the rotating side, and the block 362 is fixed to an end of the second connecting rod 332 away from the second hinge point B. Specifically, Figure 4As shown, the hook 361 includes a fixing portion 3611 fixed to the fixing hinge 31, a hook portion connected to the fixing portion 3611, the hook portion includes a yielding section 3612 extending from the fixing portion 3611 toward the rotating side, a connecting section 3613 extending from the yielding section 3612 toward a direction away from the first fixing plate 311, and a hook section 3614 extending from the connecting section 3613 toward the rotating side. The block 362 includes a connecting portion fixed to the second connecting rod 332, a block portion matched with the hook section 3614, and an outer edge of the block portion includes a first arc section 3621 extending from one end of the block portion toward the first fixing plate 311 toward away from the first fixing plate 311 and the rotating side, and a second arc section 3622 extending away from the first fixing plate 311 and toward the rotating side. When the door body 2 rotates and closes until the end of the hook segment 3614 contacts the first arc segment 3621 and continues to rotate and close the door body 2, under the pressure of the first arc segment 3621, the connecting segment 3613 deforms and drives the hook segment 3614 to give way in the direction away from the rotating side. When the hook segment 3614 and the block portion move relatively to the end of the hook segment 3614 located at the second arc segment 3622 close to the first arc segment 3621, under the action of the elastic restoring force of the connecting segment 3613, the hook segment 3614 moves toward the second arc segment 3622 away from the first arc segment 3621, driving the door body 2 to rotate toward the box body 1 to achieve power-assisted closing. After the second arc segment 3622 is completely located inside the hook segment 3614, the door body 2 is in a closed state. Of course, this is not limited to this.

[0055] Furthermore, the hook 361 and the corresponding positions on the fixed hinge 31 are penetrated with through holes, and the auxiliary folding mechanism 36 also includes a fixing column for simultaneously inserting the hook 361 and the through holes on the fixed hinge 31, and the fixation between the hook 361 and the fixed hinge 31 is achieved through the cooperation between the fixing column and the through hole, which can facilitate the assembly between the hook 361 and the fixed hinge 31.

[0056] Furthermore, the hinge device 3 further includes a first limiting structure 37 disposed between the fixed hinge component 31 and the hook 361 , and the first limiting structure 37 is used for limiting the rotation of the hook 361 relative to the fixed hinge component 31 .

[0057] Specifically, the fixed hinge 31 includes two first hinge plates 312 respectively disposed at the upper and lower ends of the first fixed plate 311, and a connecting plate 313 connected to one end of the first hinge plate 312 away from the rotating side. The first limiting structure 37 includes a limiting groove 371 disposed on one of the hook 361 and the connecting plate 313, and a limiting column 372 disposed on the other. Of course, this is not limited to this.

[0058] In a specific embodiment, the second connecting rod 332 has a hinge shaft 335 at one end away from the second hinge point B, and the second connecting rod 332 and the fourth connecting rod 334 are hinged to the hinge shaft 335. The clamping block 362 is sleeved on the hinge shaft 335, that is, the connecting portion is sleeved on the hinge shaft 335. The hinge device 3 also includes a second limiting structure 38 provided between the clamping block 362 and the second connecting rod 332, and the second limiting structure 38 is used to limit the rotation of the clamping block 362 around the hinge shaft 335. The assembly of the clamping block 362 is simplified. Of course, it is not limited to this. In other embodiments, the clamping block 362 can also be set to be integrally formed with the second connecting rod 332.

[0059] Specifically, the second connecting rod 332 includes two first plates 34 spaced apart in the vertical direction, and a second plate 35 connecting one end of the two first plates 34 away from the movable hinge 32. The second limiting structure 38 is an L-shaped abutting groove provided on the side of the clamping block 362 facing the second plate 35, and the L-shaped abutting groove abuts against the end surface of the second plate 35 and the wall surface of the second plate 35 facing the movable hinge 32. Thus, the clamping block 362 can be limited from rotating around the hinge shaft 335.

[0060] Combination Figure 9-10 The hinge device 3a in the second embodiment of the present invention is shown in FIG. The hinge device 3a in the second embodiment of the present invention is different from the hinge device 3 in the first embodiment in that the power-assisted folding mechanism 36a is different.

[0061] Specifically, in this embodiment, the auxiliary folding mechanism 36a includes a guide plate 363 fixed to one end of the second connecting rod 332 near the fifth hinge point E, and an elastic component provided on the fourth connecting rod 334. The outer edge profile of the guide plate 363 has a limiting recess 3631, and the limiting recess 3631 is located on the side of the guide plate 363 facing the second hinge point B. The elastic component includes a seat body 364 connected to the fourth connecting rod 334, an elastic member 365 fixed to the seat body 364 and protruding toward the fifth hinge point E, and a push block 366 connected to the elastic member 365 and abutting against the outer edge profile of the guide plate 363. When the connecting rod assembly 33 switches between the unfolded state and the folded state, under the action of the elastic restoring force of the elastic member 365, the push block 366 always abuts against the outer edge profile of the guide plate 363 and moves along the outer edge profile of the guide plate 363. When the connecting rod assembly 33 is in the folded state, under the action of the elastic restoring force of the elastic member 365, the push block 366 is abutted against the limiting recess 3631, and the limiting recess 3631 limits the movement of the push block 366 along the outer edge contour of the guide plate 363, so that the connecting rod assembly 33 can be maintained in the folded state to keep the door body 2 in the closed state and avoid the door body 2 from being loosely closed.

[0062] Furthermore, the outer edge profile of the guide plate 363 also includes a guiding slope 3632 connected to the limiting recess 3631. The guiding slope 3632 is located at one end of the limiting recess 3631 close to the movable hinge, that is, the end away from the second plate 35. Along the direction close to the limiting recess 3631, the guiding slope 3632 extends obliquely toward the fifth hinge point E. After the connecting rod assembly 33 switches from the unfolded state to the folded state until the push block 366 is located on the guiding slope 3632, under the action of the elastic restoring force of the elastic member 365, the push block 366 automatically moves along the guiding slope 3632, driving the connecting rod assembly 33 to automatically fold, playing a certain role in assisting the door closing.

[0063] Specifically, the connection structure and the limiting structure between the guide plate 363 and the second connecting rod 332 may adopt the connection structure and the limiting structure between the block 362 and the second connecting rod 332 in the first embodiment, and will not be described in detail here.

[0064] Specifically, the seat body 364 includes a seat body 3641, a fixed shaft 3642 connected to the seat body 3641 and protruding toward the fifth hinge point E, the push block 366 is provided with a fixed shaft hole on one side of the seat body 364, the fixed shaft 3642 is movably connected to the fixed shaft hole along its axial direction, the elastic member 365 is a spring sleeved on the fixed shaft 3642, and one end of the spring abuts against the seat body 3641, and the other end abuts against the bottom wall of the fixed shaft hole. When the connecting rod assembly 33 gradually unfolds from the folded state, the push block 366 moves along the guide slope 3632 toward the guide plate 363 away from the second plate 35, and at this time, the spring is further compressed.

[0065] Furthermore, a guide slot 3341 extending along the length direction of the fourth connecting rod 334 is provided through the position on the fourth connecting rod 334 corresponding to the push block 366, and the push block 366 is provided with a stop block 3662 matched with the guide slot 3341. Thus, the moving direction of the push block 366 can be limited, and the stability of the hinge device 3 is improved.

[0066] Furthermore, the seat body 3641 is penetrated by a first fixing hole 3643, and the fourth connecting rod 334 is penetrated by a second fixing hole 3342 corresponding to the first fixing hole 3643. The hinge device 3 also includes a fastener 39 for simultaneously inserting the second fixing hole 3342 and the second fixing hole 3342. By aligning the first fixing hole 3643 with the second fixing hole 3342, and then simultaneously inserting the fastener 39 into the first fixing hole 3643 and the second fixing hole 3342, the elastic component can be assembled to the fourth connecting rod 334, thereby simplifying the assembly between the elastic component and the fourth connecting rod 334.

[0067] Specifically, the push block 366 comprises a push block seat, a rolling member 3663 connected to one end of the push block seat facing the guide plate 363, and the rolling member 3663 abuts against the outer edge contour of the guide plate 363. The friction between the push block 366 and the guide plate 363 is reduced, and the smoothness of the power-assisted folding mechanism 36 is improved.

[0068] In a specific implementation, the limit block 3662 is disposed on the rolling member 3663 , but this is not limiting.

[0069] The hinge device 3a in the second embodiment of the present invention is the same as the hinge device 3 in the first embodiment except for the above-mentioned differences; details will not be repeated here.

[0070] Furthermore, the direction in the plane where the first hinge plate 312 is located and parallel to the plane where the opening side of the box body 1 is located is the horizontal direction X, and the direction in the plane where the first hinge plate 312 is located and perpendicular to the horizontal direction X is the longitudinal direction Y. Figure 2 As shown, the lateral distance between the first hinge point A and the second hinge point B in the lateral direction X is greater than the longitudinal distance in the longitudinal direction Y. The lateral distance between the first hinge point A and the second hinge point B can be increased, the force bearing area of ​​the first hinge plate 312 (fixed hinge member 31) in the lateral direction X is increased, and the force bearing area of ​​the first hinge plate 312 as a whole is increased, which can improve the overall strength of the hinge device 3, prevent the door body 2 from sagging, and improve the stability of the hinge device 3.

[0071] It is known that in an embodiment where the first fixing plate 311 is perpendicular to the first hinge plate 312 , the transverse direction X is parallel to the plane where the first fixing plate 311 is located.

[0072] Specifically, the horizontal direction X is the left-right direction, and the vertical direction Y is the front-back direction.

[0073] Further, the distance between the first hinge point A and the fixed rotating end P1 is smaller than the distance between the second hinge point B and the fixed rotating end P1, and the distance between the first hinge point A and the first fixed plate 311 is greater than the distance between the second hinge point B and the first fixed plate 311.

[0074] Furthermore, the distance between the first hinge point A and the first fixing plate 311 is 24 mm to 26 mm. By setting the distance between the first hinge point A and the first fixing plate 311 to be larger, the distance between the first hinge point A and the cabinet 1 is larger, so that the door body 2 can have a larger forward movement when it rotates to open, thereby further avoiding interference between the door body 2 and the cabinet 200 during the rotation process.

[0075] Furthermore, the direction along the horizontal direction X toward the rotating side is defined as the first direction, and the direction opposite to the first direction is defined as the second direction. The distance between the first hinge point A and the fixed rotating end P1 is 8 mm to 9 mm. By setting the distance between the first hinge point A and the fixed rotating end P1 to be smaller, the distance between the first hinge point A and the plane where the side wall of the box body 1 on the rotating side is located is smaller, so that the door body 2 can have more lateral displacement along the first direction when it is rotated to open, that is, the distance that the door body 2 moves away from the rotating side along the first direction is greater, thereby increasing the opening of the door body 2 and preventing the door body 2 from affecting the pulling and drawing of drawers / shelves in the box body 1.

[0076] Furthermore, the distance between the second hinge point B and the fixed rotating end P1 is greater than the distance between the second hinge point B and the first fixed plate 311. The force bearing area of ​​the first hinge plate 312 (fixed hinge member 31) in the horizontal direction X can be further increased, and the force bearing area of ​​the first hinge plate 312 as a whole is increased, so that the overall strength of the hinge device 3 can be improved, the door body 2 can be prevented from sagging, and the stability of the hinge device 3 can be improved.

[0077] Specifically, combined Figure 2 , Figure 7 , Figure 8 As shown, the connecting rod assembly 33 and the fixed hinge 31 and the movable hinge 32 form two quadrilaterals, which are respectively quadrilateral ABFG formed by the line AB between the first hinge point A and the second hinge point B, the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line GA between the seventh hinge point G and the first hinge point A, and quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C. In the process of the door body 2 rotating to open, the door body 2 is driven to translate according to the preset trajectory through the deformation of the two quadrilaterals.

[0078] Furthermore, when the movable hinge 32 is in the closed state and the open state, the quadrilateral ABFG formed by the line AB between the first hinge point A and the second hinge point B, the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line AG between the seventh hinge point G and the first hinge point A is a convex quadrilateral. That is, when the door body 2 is in the closed state and the open state, the quadrilateral ABFG formed by the line AB between the first hinge point A and the second hinge point B, the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line AG between the seventh hinge point G and the first hinge point A is always a convex quadrilateral, avoiding the occurrence of dead points in the process of opening and closing the door body 2, and improving the smoothness of opening and closing the door body 2.

[0079] It should be noted that the above-mentioned dead point refers to the point where the inner angle is located when the corresponding angle is 180° when the quadrilateral becomes a triangle during the process of opening and closing the door body 2.

[0080] Furthermore, in the quadrilateral ABFG formed by the line AB connecting the first hinge point A and the second hinge point B, the line BF connecting the second hinge point B and the sixth hinge point F, the line FG connecting the sixth hinge point F and the seventh hinge point G, and the line AG connecting the seventh hinge point G and the first hinge point A, the line AG connecting the first hinge point A and the seventh hinge point G is the longest, which can enable the door body 2 to have more forward movement when it is rotated to open, thereby further avoiding interference between the door body 2 and the cabinet 200 during rotation.

[0081] Further, in the quadrilateral ABFG formed by the line AB between the first hinge point A and the second hinge point B, the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line AG between the seventh hinge point G and the first hinge point A, the sum of the line AB between the first hinge point A and the second hinge point B and the line AG between the first hinge point A and the seventh hinge point G is greater than the sum of the line BF between the second hinge point B and the sixth hinge point F and the line FG between the sixth hinge point F and the seventh hinge point G. On the one hand, it can reduce the volume of the connecting rod assembly 33 in the folded state, thereby reducing the distance between the door body 2 and the box body 1 when in the closed state, and improving the sealing of the door body 2; on the other hand, it is more conducive to making the door body 2 have more lateral displacement along the horizontal direction X and toward the rotating side when rotating to open, thereby increasing the opening of the door body 2 and preventing the door body 2 from affecting the pulling and drawing of drawers / shelves in the box body 1.

[0082] Specifically, when the movable hinge 32 is in the closed state, in the quadrilateral ABFG formed by the line AB between the first hinge point A and the second hinge point B, the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line AG between the seventh hinge point G and the first hinge point A, the inner angles B and G corresponding to the second hinge point B and the seventh hinge point G are obtuse angles, and the inner angles A and F corresponding to the first hinge point A and the sixth hinge point F are acute angles. The volume of the connecting rod assembly 33 in the folded state can be reduced, thereby reducing the distance between the door body 2 and the box body 1 in the closed state, and improving the sealing performance of the door body 2.

[0083] Furthermore, when the movable hinge 32 is in the closed state, the line between the second hinge point B and the sixth hinge point F extends obliquely in a direction away from the first fixed plate 311 from the second hinge point B toward the sixth hinge point F. In the early stage of the door body 2 rotating and opening from the closed state, that is, when the door body 2 rotates and opens from the closed state to the first opening angle, the forward movement of the door body 2 is larger than the translation in other horizontal directions, and the rotation angle is smaller, which is conducive to the smooth opening of the door body 2.

[0084] When the door body 2 is rotated and opened from the closed state to the first opening angle, the door body 2 is mainly driven by the expansion of the quadrilateral ABFG formed by the line AB connecting the first hinge point A and the second hinge point B, the line BF connecting the second hinge point B and the sixth hinge point F, the line FG connecting the sixth hinge point F and the seventh hinge point G, and the line AG connecting the seventh hinge point G and the first hinge point A. That is, when the door body 2 is rotated and opened from the closed state to the first opening angle, the line A connecting the first hinge point A and the second hinge point B B. The expansion range of the quadrilateral ABFG formed by the line BF between the second hinge point B and the sixth hinge point F, the line FG between the sixth hinge point F and the seventh hinge point G, and the line AG between the seventh hinge point G and the first hinge point A is greater than the expansion range of the quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C.

[0085] In a specific implementation, the first opening angle is 10° to 15°, but is not limited thereto.

[0086] Further, when the movable hinge 32 is in the closed state and the open state, the quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C is a convex quadrilateral. That is, when the door body 2 is in the closed state and the open state, the quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C is always a convex quadrilateral, avoiding the occurrence of dead points in the process of opening and closing the door body 2, and improving the smoothness of opening and closing the door body 2.

[0087] Furthermore, when the movable hinge 32 is in the closed state and the open state, the line CF connecting the third hinge point C and the sixth hinge point F is located on the side of the line FG connecting the sixth hinge point F and the seventh hinge point G away from the first fixed plate 311. The quadrilateral ABFG formed by the line AB connecting the first hinge point A and the second hinge point B, the line BF connecting the second hinge point B and the sixth hinge point F, the line FG connecting the sixth hinge point F and the seventh hinge point G, and the line AG connecting the seventh hinge point G and the first hinge point A, and the quadrilateral CDEF formed by the line CF connecting the third hinge point C and the sixth hinge point F, the line EF connecting the sixth hinge point F and the fifth hinge point E, the line ED connecting the fifth hinge point E and the fourth hinge point D, and the line CD connecting the fourth hinge point D and the third hinge point C do not cross each other, and no interference occurs, thereby improving the smoothness of opening and closing the door body 2.

[0088] Further, in the quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C, the sum of the line EF between the sixth hinge point F and the fifth hinge point E and the line ED between the fifth hinge point E and the fourth hinge point D is greater than the sum of the line CF between the third hinge point C and the sixth hinge point F and the line CD between the fourth hinge point D and the third hinge point C. A large-angle door opening can be achieved, that is, the maximum opening angle of the door body 2 is increased, and the opening degree of the door body 2 is increased, which is convenient for users to take and put items.

[0089] Specifically, when the movable hinge 32 is in a closed state, in the quadrilateral CDEF formed by the line CF connecting the third hinge point C and the sixth hinge point F, the line EF connecting the sixth hinge point F and the fifth hinge point E, the line ED connecting the fifth hinge point E and the fourth hinge point D, and the line CD connecting the fourth hinge point D and the third hinge point C, the internal angles corresponding to the sixth hinge point F and the fourth hinge point D are obtuse angles, and the internal angles corresponding to the third hinge point C and the fifth hinge point E are acute angles. When the movable hinge 32 is in a closed state, the two quadrilaterals formed by the connecting rod assembly 33, the fixed hinge 31 and the movable hinge 32 are folded and flattened in the front-to-back direction, which can reduce the volume of the connecting rod assembly 33 in the folded state, thereby reducing the distance between the door body 2 and the box body 1 when in a closed state, and improving the sealing performance of the door body 2.

[0090] Combination Figure 7-Figure 8As shown in the figure, in the process of the door body 2 continuing to rotate and open from 90° to the maximum opening angle, the door body 2 is mainly driven by the expansion of the quadrilateral CDEF formed by the line CF between the third hinge point C and the sixth hinge point F, the line EF between the sixth hinge point F and the fifth hinge point E, the line ED between the fifth hinge point E and the fourth hinge point D, and the line CD between the fourth hinge point D and the third hinge point C. That is, in the process of the door body 2 continuing to rotate and open from 90° to the maximum opening angle, the third hinge point C and the sixth hinge point F are connected to form a quadrilateral CDEF. The expansion range of the quadrilateral CDEF formed by the line CF connecting point F, the line EF connecting the sixth hinge point F and the fifth hinge point E, the line ED connecting the fifth hinge point E and the fourth hinge point D, and the line CD connecting the fourth hinge point D and the third hinge point C is greater than the expansion range of the quadrilateral ABFG formed by the line AB connecting the first hinge point A and the second hinge point B, the line BF connecting the second hinge point B and the sixth hinge point F, the line FG connecting the sixth hinge point F and the seventh hinge point G, and the line AG connecting the seventh hinge point G and the first hinge point A.

[0091] Specifically, in the process of the door body 2 continuing to rotate from 90° to open to the maximum opening angle, the door body 2 synchronously translates backward and along the second direction toward the direction close to the box body 1, that is, the translation direction of the door body 2 has directional components in the backward direction and the second direction, so that the door body 2 moves backward and along the second direction toward the direction close to the box body 1, and the center of gravity of the door body 2 moves toward the box body 1, so as to prevent the door body 2 from tipping over.

[0092] Furthermore, when the movable hinge 32 is in an open state and the angle between it and the fixed hinge 31 is 90°, the opening angle of the door body 2 is 90°, and the third hinge point C and the fourth hinge point D are both located on the side of the first hinge point A and the second hinge point B facing the rotating side. In the middle of the opening of the door body 2, that is, when the door body 2 opens from the first opening angle to 90°, the door body 2 has a large lateral displacement along the first direction, that is, the distance that the door body 2 exceeds the box body 1 in the first direction is increased, which can increase the opening of the door body 2 and prevent the door body 2 from affecting the pulling and drawing of the drawers / shelves in the box body 1.

[0093] In a specific embodiment, when the door body 2 is opened to 90 degrees, the distance that the door body 2 exceeds the box body 1 in the first direction is 21.4 mm. Of course, this is not limited to this.

[0094] Furthermore, when the movable hinge 32 is in a closed state, the third hinge point C and the fourth hinge point D are both located on the side of the first hinge point A and the second hinge point B away from the first fixing plate 311. This can increase the forward movement of the door body 2 during the rotation and opening process, and further avoid interference between the door body 2 and the cabinet 200.

[0095] It is known that, in the process of the door body 2 opening from the first opening angle to 90°, the door body 2 not only translates along the first direction, but also translates forward, that is, the translation direction of the door body 2 has a first direction and a forward component vector.

[0096] In a specific embodiment, when the movable hinge 32 is in a closed state, the line CD connecting the third hinge point C and the fourth hinge point D is parallel to the plane where the first fixed plate 311 is located. That is, the line CD connecting the third hinge point C and the fourth hinge point D is parallel to the plane where the door body 2 is located. Of course, this is not limited to this.

[0097] Specifically, the fixed hinge member 31 includes two first hinge plates 312 disposed at the upper and lower ends of the first fixed plate 311 and extending in the same direction, and the first connecting rod 331 and the second connecting rod 332 are respectively hinged at the first hinge point A and the second hinge point B between the two first hinge plates 312. The movable hinge member 32 includes two second hinge plates 322 disposed at the upper and lower ends of the second fixed plate 321 and extending in the same direction, and the third connecting rod 333 and the fourth connecting rod 334 are respectively hinged at the third hinge point C and the fourth hinge point D between the two second hinge plates 322.

[0098] In summary, the hinge device 3, 3a in the present invention can keep the door body 2 in a closed state by providing an auxiliary folding mechanism 36, 36a for keeping the connecting rod assembly 33 in a folded state, thereby avoiding the situation where the door body 2 is not closed tightly and causes cold leakage.

[0099] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0100] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the utility model and are not intended to limit the protection scope of the utility model. Any equivalent embodiments or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hinge device with a power-assisted folding mechanism, comprising a fixed hinge part fixed to a box body, a movable hinge part fixed to a door body, and a connecting rod assembly movably connecting the movable hinge part to the fixed hinge part, wherein the connecting rod assembly has a folded state and an unfolded state; characterized in that: The hinge device also includes a power-assisted folding mechanism for keeping the connecting rod assembly in a folded state; Taking the side where the movable hinge and the fixed hinge rotate relative to each other as the rotating side, the fixed hinge has a first hinge point and a second hinge point located on the side of the first hinge point away from the rotating side; the movable hinge includes a third hinge point and a fourth hinge point located on the side of the third hinge point away from the rotating side; the connecting rod assembly includes a first connecting rod hinged at the first hinge point, a second connecting rod hinged at the second hinge point, a third connecting rod hinged at the third hinge point, and a fourth connecting rod hinged at the fourth hinge point, and the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod are hinged to each other.

2. The hinge device with power-assisted folding mechanism according to claim 1, characterized in that: When the connecting rod assembly moves from the unfolded state to the folded state, the ends of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod away from the rotating side all move in the direction away from the rotating side; the power-assisted folding mechanism includes a hook provided on one of the fixed hinge and the second connecting rod, and a block provided on the other.

3. The hinge device with power-assisted folding mechanism according to claim 2, characterized in that: The hook is arranged at an end of the fixed hinge away from the rotating side, and the block is fixed to an end of the second connecting rod away from the second hinge point.

4. The hinge device with power-assisted folding mechanism according to claim 3, characterized in that: The hook is rotatably connected to the fixed hinge in a horizontal direction; the hinge device also includes a first limiting structure arranged between the fixed hinge and the hook, and the first limiting structure is used to limit the rotation of the hook relative to the fixed hinge.

5. The hinge device with power-assisted folding mechanism according to claim 3, characterized in that: The second connecting rod has a hinge axis at one end away from the second hinge point, and the second connecting rod and the fourth connecting rod are hinged to the hinge axis; the clamping block is sleeved on the hinge axis, and the hinge device also includes a second limiting structure arranged between the clamping block and the second connecting rod, and the second limiting structure is used to limit the rotation of the clamping block around the hinge axis.

6. The hinge device with power-assisted folding mechanism according to claim 5, characterized in that: The second connecting rod includes two first plates spaced apart in the vertical direction and a second plate connecting the two first plates at one end away from the movable hinge; the second limiting structure is an L-shaped abutting groove arranged on the side of the block facing the second plate, and the L-shaped abutting groove abuts against the end face of the second plate and the wall surface of the second plate facing the movable hinge.

7. The hinge device with power-assisted folding mechanism according to claim 1, characterized in that: One end of the second connecting rod away from the second hinge point and one end of the fourth connecting rod away from the fourth hinge point are hinged at a fifth hinge point; the power-assisted folding mechanism comprises: A guide plate, the guide plate is fixed to one end of the second connecting rod close to the fifth hinge point, and the outer edge profile of the guide plate has a limiting recess; An elastic component includes a seat body connected to the fourth connecting rod, an elastic member fixed to the seat body and protruding toward the fifth hinge point, and a push block connected to the elastic member and abutting against the outer edge contour of the guide plate. After the connecting rod assembly switches from the unfolded state to the folded state, the push block is limited to the limiting recess.

8. The hinge device with power-assisted folding mechanism according to claim 7, characterized in that: The outer edge profile of the guide plate has a guiding inclined surface connected to one end of the limiting recess close to the movable hinge, and the guiding inclined surface extends obliquely toward the fifth hinge point along a direction close to the limiting recess.

9. The hinge device with power-assisted folding mechanism according to claim 7, characterized in that: A guide groove extending along the length direction of the fourth connecting rod is penetrated through a position on the fourth connecting rod corresponding to the push block, and a limiting block matched with the guide groove is convexly provided on the push block.

10. The hinge device with power-assisted folding mechanism according to claim 7, characterized in that: The seat body is penetrated by a first fixing hole, the fourth connecting rod is penetrated by a second fixing hole corresponding to the first fixing hole, and the hinge device further comprises a fastener for simultaneously inserting into the second fixing hole and the second fixing hole.

11. The hinge device with power-assisted folding mechanism according to claim 7, characterized in that: The seat body includes a seat body, a fixed shaft connected to the seat body and protruding toward the fifth hinge point, a fixed shaft hole is recessed on the side of the push block facing the seat body, the fixed shaft is movably connected in the fixed shaft hole along its axial direction, the elastic member is a spring sleeved on the fixed shaft, and one end of the spring abuts against the seat body, and the other end abuts against the bottom wall of the fixed shaft hole.

12. The hinge device with power-assisted folding mechanism according to claim 7, characterized in that: The push block has a rolling element, and the rolling element abuts against the outer edge contour of the guide plate.

13. The hinge device with power-assisted folding mechanism according to claim 1, characterized in that: The fixed hinge member includes a first hinge plate for connecting the connecting rod assembly, the first hinge plate is perpendicular to the plane where the opening side of the box is located, the first hinge point and the second hinge point are both arranged on the first hinge plate, the direction in the plane where the first hinge plate is located and parallel to the plane where the opening side of the box is located is the transverse direction, and the direction in the plane where the first hinge plate is located and perpendicular to the transverse direction is the longitudinal direction, and the transverse distance between the first hinge point and the second hinge point in the transverse direction is greater than the longitudinal distance in the longitudinal direction.

14. The hinge device with power-assisted folding mechanism according to claim 13, characterized in that: The fixed hinge member includes a first fixed plate for fixing to a box body, the first hinge plate is connected to the first fixed plate; the first hinge plate has a fixed rotating end located on the rotating side, the distance between the first hinge point and the fixed rotating end is smaller than the distance between the second hinge point and the fixed rotating end, and the distance between the first hinge point and the first fixed plate is greater than the distance between the second hinge point and the first fixed plate.

15. The hinge device with power-assisted folding mechanism according to claim 1, characterized in that: One end of the second link away from the second hinge point and one end of the fourth link away from the fourth hinge point are hinged at the fifth hinge point; one end of the third link away from the third hinge point is hinged to the sixth hinge point on the second link located between the second hinge point and the fifth hinge point, and one end of the first link away from the first hinge point is hinged to the seventh hinge point on the third link located between the third hinge point and the sixth hinge point.

16. The hinge device with power-assisted folding mechanism according to claim 15, characterized in that: When the connecting rod assembly is in a folded state and an unfolded state, the quadrilateral formed by the lines connecting the first hinge point and the second hinge point, the line connecting the second hinge point and the sixth hinge point, the line connecting the sixth hinge point and the seventh hinge point, and the line connecting the seventh hinge point and the first hinge point is a convex quadrilateral.

17. The hinge device with power-assisted folding mechanism according to claim 1, characterized in that: The fixed hinge member includes a first fixed plate for fixing to a box body, a first hinge plate connected to the first fixed plate and used to connect the connecting rod assembly, and the first hinge point and the second hinge point are both arranged on the first hinge plate; when the connecting rod assembly is in a folded state, the third hinge point and the fourth hinge point are both located on the side of the first hinge point and the second hinge point away from the first fixed plate.

18. A refrigeration device, comprising a box and a door for opening or closing the box, characterized in that: The refrigeration device further comprises a hinge device with a power-assisted folding mechanism as claimed in any one of claims 1 to 17.

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