WO2024074109A1

WO2024074109A1 - Lower hinge assembly and built-in refrigerator

Info

Publication number: WO2024074109A1
Application number: PCT/CN2023/121666
Authority: WO
Inventors: 王常志; 夏恩品; 李康; 董雨峰
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2022-10-08
Filing date: 2023-09-26
Publication date: 2024-04-11
Also published as: CN117888788A

Abstract

Provided in the present invention are a lower hinge assembly and a built-in refrigerator. The lower hinge assembly comprises a fixed hinge member and a movable hinge member, wherein a shaft body and a groove body are provided between the fixed hinge member and the movable hinge member; and a groove bottom of the groove body is provided with a concave-convex structure, and in a process of the movable hinge member rotating relative to the fixed hinge member, a matching end of the shaft body located in the groove body matches the concave-convex structure, such that the shaft body can be positioned, so as to position a door body at a preset position.

Description

Lower hinge assembly and built-in refrigerator

Technical Field

The invention relates to the field of refrigeration equipment, and in particular to a lower hinge assembly for a built-in refrigerator and a built-in refrigerator having the lower hinge assembly.

Background technique

Normally, the refrigerator and the door body achieve relative movement through a fixed hinge, and the door body rotates around a fixed axis, which greatly limits the opening and closing freedom of the door body, that is, the movement trajectory of the door body cannot be freely controlled to adapt to different application scenarios.

With the progress of society and the improvement of people's living standards, ordinary users pay more and more attention to the placement and placement of refrigerators in the home. In view of the current home decoration style, some families pursue style integration, so they need to put the refrigerator in the cabinet to form a so-called built-in refrigerator. A refrigerator whose door body only rotates around a fixed axis is difficult to adapt to this embedded application scenario, that is, when the door is opened, there will be interference between the door body and the cabinet.

Some existing built-in refrigerators use a dual-axis dual-slot structure to connect the cabinet and the door, so that when the door is rotated and opened, it drives the door to move along a preset trajectory to avoid interference between the door and the cabinet. However, the door cannot hover during the opening process; at the same time, it cannot be powered to close the door, and the door is prone to rebound when closing, resulting in problems such as loose closing at small angles, which affects the user experience.

Summary of the invention

The object of the present invention is to provide a lower hinge assembly and a built-in refrigerator having the lower hinge assembly.

To achieve the above-mentioned invention objectives, the present invention adopts the following technical solutions: a lower hinge assembly, comprising a fixed hinge fixed on a box body, and a movable hinge fixed on a door body and movably connected to the fixed hinge; a shaft body and a groove body matching with the shaft body are provided between the fixed hinge part and the movable hinge part; in the process of the movable hinge part rotating and opening in a direction away from the fixed hinge part, the shaft body and the groove body cooperate to drive the movable hinge part to translate along a preset trajectory; the bottom of the groove body has a concave-convex structure; in the process of the movable hinge part rotating relative to the fixed hinge part, the mating end of the shaft body located in the groove body cooperates with the concave-convex structure.

As a further improved technical solution of the present invention, the groove body has a closing section. When the movable hinge rotates from a preset closing angle toward the fixed hinge to close to a closed state, the shaft moves along the closing section, and the mating end of the shaft abuts against the groove bottom of the closing section. The concave-convex structure includes a groove bottom located in the closing section; the closing section includes a first end and a second end opposite to each other. When the movable hinge is closed to a preset closing angle, the shaft is located at the second end. When the movable hinge is in a closed state, the shaft is located at the first end. From the second end toward the first end, the groove bottom of the closing section extends obliquely in the depth direction of the groove body.

As a further improved technical solution of the present invention, the preset closing angle is 15°.

As a further improved technical solution of the present invention, the shaft body includes a first shaft body and a second shaft body, and the groove body includes a first groove body matched with the first shaft body and a second groove body matched with the second shaft body; the fixed hinge has a pivot side, and the direction away from the pivot side from the center of the fixed hinge is the first direction; the first groove body includes an initial position and a first stop position, and the second groove body includes a third end and a fourth end that are relatively arranged, and a first section and a second section that are located between the third end and the fourth end and are connected; when the movable hinge is in a closed state, the first shaft body is located at the initial position, and the second shaft body is located at the third end; when the movable hinge is opened from the closed state to the first opening angle, the first shaft body remains in the initial position, and the second shaft body moves in the first section with the first shaft body as the center; when the movable hinge continues to open from the first opening angle to the second opening angle, the second shaft body moves in the second section and drives the first shaft body to move from the initial position to the first stop position, and drives the movable hinge to translate along the first direction; the closed section is located in the first section.

As a further improved technical solution of the present invention, the concave-convex structure also includes a guide slope located on the side of the initial position toward the first stop position, and the guide slope extends obliquely in the depth direction of the groove body from the first stop position toward the initial position to the initial position; when the movable hinge rotates toward the fixed hinge and closes until the first axis is located at the initial position, the second axis is located at the second end.

As a further improved technical solution of the present invention, the concave-convex structure includes a limiting groove, and after the movable hinge is rotated and opened in a direction away from the fixed hinge until the shaft is located in the limiting groove, the movable hinge is limited to a preset opening angle.

As a further improved technical solution of the present invention, the preset opening angle is not less than 90°.

As a further improved technical solution of the present invention, the shaft body includes a first shaft body and a second shaft body, and the groove body includes a first groove body matched with the first shaft body and a second groove body matched with the second shaft body; the first groove body includes an initial position, a first stop position, and a pivot position located on the side of the initial position away from the first stop position, and the second groove body includes a third end and a fourth end arranged oppositely. When the movable hinge is in a closed state, the first shaft body is located at the initial position and the second shaft body is located at the third end. When the movable hinge is rotated to open to the maximum opening angle, the second shaft body moves along the second groove body from the third end to the fourth end, driving the first shaft body to reciprocate in the first groove body; the limit groove is arranged in the second groove body.

As a further improved technical solution of the present invention, the mating end is in an outwardly convex hemispherical shape.

To achieve the above-mentioned purpose of the invention, the present invention also provides a built-in refrigerator, including a box body and a door body for opening or closing the box body; the built-in refrigerator also includes the above-mentioned lower hinge assembly that movably connects the door body to the box body.

The beneficial effect of the present invention is that the lower hinge assembly of the present invention is provided with a concave-convex structure matching with the shaft body at the bottom of the groove, and under the action of the self-gravity of the door body, the matching end of the shaft body will abut against the concave-convex structure at the bottom of the groove. The convex structure can position the shaft body and the door body at a preset position, such as limiting it to a preset opening angle or limiting it to a closed state; or under the deadweight of the door body, it can guide the shaft body to achieve assisted door closing or assisted door opening, thereby achieving the effect of saving effort.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a refrigerator in a specific embodiment of the present invention (the door is in a closed state);

FIG2 is an exploded view of the lower hinge assembly of FIG1 ;

3 is a bottom view of the first shaft body, the first groove body, the second shaft body, and the second groove body in the lower hinge assembly of the refrigerator shown in FIG1 (the door body is in a closed state, and the concave-convex structure is not shown);

4 is a bottom view of the first shaft body, the first groove body, the second shaft body, and the second groove body in the lower hinge assembly of the refrigerator shown in FIG. 1 (the door body is at a first opening angle, and the concave-convex structure is not shown);

5 is a bottom view of the first shaft body, the first groove body, the second shaft body, and the second groove body in the lower hinge assembly of the refrigerator shown in FIG. 1 (the door body is at a second opening angle, and the concave-convex structure is not shown);

6 is a bottom view of the first shaft body, the first groove body, the second shaft body, and the second groove body in the lower hinge assembly of the refrigerator shown in FIG. 1 (the door body is rotated from the second opening angle to the third opening angle, and the concave-convex structure is not shown);

7 is a bottom view of the first shaft body, the first groove body, the second shaft body, and the second groove body in the lower hinge assembly of the refrigerator shown in FIG. 1 (the door body is at the maximum opening angle, and the concave-convex structure is not shown);

FIG8 is a schematic structural diagram of the refrigerator shown in FIG1 (the door is in a suspended state).

Detailed ways

The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. Please refer to Figures 1 to 8, which are preferred embodiments of the present invention, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. However, it should be noted that these embodiments are not limitations of the present invention, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the protection scope of the present invention.

In the drawings of the present invention, for the convenience of illustration, some sizes of structures or parts may be exaggerated relative to other structures or parts, and thus, only the basic structure of the subject matter of the present invention is illustrated.

Spatially relative terms such as "left", "right", "front", "rear", etc., used herein are for ease of explanation to describe the relationship of one element or feature relative to another element or feature as shown in the drawings. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terms first, second, third, fourth, etc. in the present invention are only used for descriptive purposes to distinguish these described objects from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; in addition, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example For example, the connection may be a direct connection or an indirect connection through an intermediate medium, and may be a fixed connection or a movable connection or a detachable connection or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

1 and 2 show a lower hinge assembly 3 and a built-in refrigerator 10 having the lower hinge assembly 3 in a specific embodiment of the present invention. The built-in refrigerator 10 is used to be embedded in a cabinet 20, but of course, it is not limited thereto, and the built-in refrigerator 10 can also be embedded in a wall, etc.

The built-in refrigerator 10 includes a box body 1, a door body 2 for opening or closing the box body 1, and a hinge assembly for movably connecting the door body 2 to the box body 1. When the door body 2 is rotated and opened in a direction away from the box body 1, the hinge assembly drives the door body 2 to translate along a preset trajectory to avoid interference between the door body 2 and the cabinet 20.

Specifically, the hinge assembly includes an upper hinge assembly disposed above the door body 2 and a lower hinge assembly 3 disposed below the door body 2. The present invention does not limit the specific structure of the upper hinge assembly, as long as the upper hinge assembly cooperates with the lower hinge assembly 3 to drive the door body 2 to translate along a preset trajectory during the rotation of the door body 2.

As shown in FIG2 , the lower hinge assembly 3 includes a fixed hinge 31 fixed to the box body 1, and a movable hinge 32 fixed to the door body 2 and movably connected to the fixed hinge 31. A shaft 33 and a groove 34 matched with the shaft 33 are provided between the fixed hinge 31 and the movable hinge 32. During the rotation of the door body 2, the shaft 33 and the groove 34 match to drive the door body 2 to translate along a preset trajectory.

It is known that during the rotation of the door body 2, the movable hinge 32 moves synchronously with the door body 2, and the door body 2 moving in translation along a preset trajectory refers to the movable hinge 32 moving in translation along a preset trajectory.

Furthermore, the groove bottom 341 of the groove body 34 has a concave-convex structure, and during the rotation of the door body 2 relative to the box body 1, the mating end 331 of the shaft body 33 located in the groove body 34 is mated with the concave-convex structure. It is known that under the action of the self-weight of the door body 2, the mating end 331 will abut against the concave-convex structure of the groove bottom 341, so that the shaft body 33 can be positioned to position the door body 2 at a preset position, such as limiting it to a preset opening angle or limiting it to a closed state; or under the self-weight of the door body 2, the shaft body 33 can be guided to achieve power-assisted door closing or power-assisted door opening, thereby achieving a labor-saving effect.

The present invention, by arranging the concave-convex structure that plays a limiting/guiding role on the groove bottom 341 , can achieve the limiting/guiding role of the door body 2 and simplify the structure of the lower hinge assembly 3 .

Furthermore, the groove body 34 has a closing section 342. When the movable hinge 32 rotates from a preset closing angle toward the fixed hinge 31 to close to a closed state, the shaft body 33 moves along the closing section 342. The mating end 331 of the shaft body 33 abuts against the groove bottom 341 of the closing section 342. The concave-convex structure includes the groove bottom 341 located at the closing section 342. The closing section 342 includes a first end and a second end opposite to each other. When the movable hinge 32 is closed to a preset closing angle, the shaft body 33 is located at the second end. When the movable hinge 32 is in a closed state, the shaft body 33 is located at the first end. The shaft body 33 moves from the second end toward the first end. The groove bottom 341 of the closing section 342 extends obliquely in the depth direction of the groove body 34. Under the action of the deadweight of the door body 2, the mating end 331 of the shaft body 33 moves along the groove bottom 341 of the closing section 342, so that the door body 2 rotates and closes, which can play a role in assisting the door closing. At the same time, after the door body 2 is in the closed state, the shaft body 33 and the first end of the closing section 342 are abutted against each other, which can also limit the door body 2 in the closed state, so as to avoid the door body 2 from rebounding after closing and avoid the problem of loose closing.

In a specific embodiment, the preset closing angle is 15°. That is, when the door body 2 is closed to 15°, the mating end 331 of the shaft body 33 is located at the second end. At this time, when the user lets go, the mating end 331 of the shaft body 33 moves along the groove bottom 341 of the closing section 342 under the weight of the door body 2, so that the door body 2 rotates and closes, playing a role of assisting the door closing. Of course, this is not limited to this.

Furthermore, in this embodiment, the shaft 33 includes a first shaft 332 and a second shaft 333, and the slot 34 includes a first slot 343 matched with the first shaft 332 and a second slot 344 matched with the second shaft 333. In the process of the movable hinge 32 rotating and opening in the direction away from the fixed hinge 31, the first shaft 332 cooperates with the first slot 343, and the second shaft 333 cooperates with the second slot 344 to drive the movable hinge 32 to translate along a preset trajectory, thereby driving the door body 2 to translate along a preset trajectory. In the present invention, the door body 2 is driven to move along a preset trajectory during rotation by cooperating with the double shafts (the first shaft 332 and the second shaft 333) and the double slots (the first slot 343 and the second slot 344). Compared with a single-axis hinge, it does not require high installation precision, which can greatly reduce the design cost and installation difficulty.

In this embodiment, the first shaft 332 and the second shaft 333 are both disposed on the fixed hinge 31, and the first slot 343 and the second slot 344 are both disposed on the movable hinge 32. Of course, this is not limiting, and in other embodiments, the first shaft 332 and the second shaft 333 may also be both disposed on the movable hinge 32, and the first slot 343 and the second slot 344 may be both disposed on the fixed hinge 31.

Specifically, the fixed hinge member 31 includes a hinge plate fixed on the box body 1 , and the first shaft body 332 and the second shaft body 333 are both protruded on the upper surface of the hinge plate.

1 , the fixed hinge 31 has a pivot side 311 located at the rotation end of the movable hinge 32. A direction from the center of the fixed hinge 31 away from the pivot side 311 is defined as a first direction X, and a direction from the center of the fixed hinge 31 toward the pivot side 311 is defined as a second direction Y.

Specifically, when the pivoting side 311 is the right side, the first direction X is from right to left, and the second direction Y is from left to right. When the pivoting side 311 is the left side, the first direction X is from left to right, and the second direction Y is from right to left.

Specifically, in combination with Figures 3 to 7, Figures 3 to 7 do not show the concave-convex structure in order to illustrate the cooperation between the shaft body 33 and the groove body 34 during the opening/closing process of the door body.

The first slot body 343 includes an initial position A1 and a first stop position A2, and the second slot body 344 includes a third end L1 and a fourth end L2 that are oppositely disposed, and a first section L2 that is located between and connected to the third end L1 and the fourth end L2. L3 and the second section L4. As shown in FIG3, when the door body 2 is in a closed state, the first shaft 332 is in an initial position A1, and the second shaft 333 is located at the first end L1. The first section L3 is an arc with the initial position A1 as the center. As shown in FIG4, when the door body 2 is opened from a closed state to a first opening angle, the first shaft 332 remains in the initial position A1, and the second shaft 333 moves in the first section L3. At this time, the door body 2 rotates in situ with the first shaft 332 located at the initial position A1 as the axis, that is, the door body 2 only rotates without displacement in other directions, which can effectively avoid the door body 2 being unable to open normally due to displacement in a certain direction of the door body 2. For example, the door body 2 with a flip beam can make the protrusion on the flip beam detach from the groove on the box body 1, so that the door body 2 can be opened smoothly. As shown in Figure 5, when the door body 2 continues to open from the first opening angle to the second opening angle, the second shaft 333 moves in the second section L4 toward the second end L2 to drive the first shaft 332 to move from the initial position A1 to the first stop position A2. At this time, the door body 2 moves along the first direction X away from the pivot side 311 during rotation, thereby avoiding interference between the door body 2 and surrounding cabinets 20 or walls during the opening process, which is suitable for scenarios with a smaller space to accommodate the built-in refrigerator 10.

Correspondingly, when the door is closed until the door body 2 is at the first opening angle, the first shaft body 332 switches to the initial position A1, and the second shaft body 333 moves to the first section L3. When the door body 2 continues to close from the first opening angle, the first shaft body 332 remains at the initial position A1, and the second shaft body 333 moves in the first section L3 until the door body 2 is in the closed state. At this time, the closing section 342 is located in the first section of the second groove 344, and the mating end 331 of the shaft body 33 mating with the closing section 342 refers to the end of the second shaft body 333 located in the second groove 344. In the final stage of closing the door, the cooperation between the second shaft body 333 and the closing section 342 plays a role in assisting the closing of the door.

It is known that the preset closing angle is not greater than the first opening angle.

Specifically, the first end of the closing section 342 overlaps with the third end of the second slot body 344. Of course, this is not limited to this.

Further, in combination with FIG. 2 , the concave-convex structure further includes a guiding slope 4 located at the first groove 343 on the side of the initial position A1 toward the first stop position A2, and the guiding slope 4 extends obliquely in the depth direction of the groove 34 from the first stop position A2 toward the initial position A1 to the initial position; when the movable hinge 32 rotates toward the fixed hinge 31 to close until the first shaft 332 is located at the initial position, the second shaft 333 is located at the second end. The angle of the power-assisted door closing can be increased.

That is, after the door body 2 is closed to the second opening angle and continues to close until the first shaft 332 moves to the guiding slope 4, under the action of the deadweight of the door body 2, the first shaft 332 moves along the guiding slope 4, so that the door body 2 rotates and closes, which can play the role of assisting the door closing. After the door body 2 rotates and closes until the first shaft 332 is located at the initial position, under the action of the deadweight of the door body 2, the second shaft 333 moves along the groove bottom 341 of the closing section 342 to assist the door body 2 to further close, achieving the effect of labor-saving door closing.

Further, as shown in FIG6 , when the door body 2 continues to open from the second opening angle to the third opening angle, the movable hinge 32 cooperates with the fixed hinge 31 to drive the door body 2 to move toward the pivot side 311 along the second direction Y while the door body 2 rotates. In this way, the door body 2 can be kept as far away from the box body 1 as possible, ensuring the opening of the box body 1 and avoiding the problem that the drawers, shelves, etc. in the box body 1 cannot be opened due to interference from the door body 2.

Specifically, as shown in FIG. 6 , the first slot 343 further includes a pivot position A3 located at a side of the initial position A1 away from the first stop position A2, and the second slot 344 further includes a third section L5 located between the second section L4 and the fourth end L2. When the door body 2 is in the process of continuing to open from the second opening angle to the third opening angle, the second shaft 333 moves in the third section L5 and drives the first shaft 332 to move from the first stop position A2 to the pivot position A3. At this time, the door body 2 moves toward the pivot side 311 along the second direction Y during the rotation process, so that the door body 2 can be as far away from the box body 1 as possible, ensuring the opening of the box body 1, and avoiding the problem that the drawers, shelves, etc. in the box body 1 cannot be opened due to interference from the door body 2.

It can be known that during the process of rotating and opening the door body 2, the second shaft body 333 moves unidirectionally from the third end L1 to the fourth end L2 of the second groove body 344, driving the first shaft body 332 to move back and forth in the first groove body 343, such as first moving from the initial position A1 to the first stop position A2, and then moving from the first stop position A2 toward the direction of the initial position A1 and passing through the initial position A1 to the pivot position A3.

Further, in combination with FIG. 2 and FIG. 8 , the concave-convex structure includes a limiting groove 5. After the movable hinge 32 rotates and opens in a direction away from the fixed hinge 31 until the shaft 33 is located in the limiting groove 5, the movable hinge 32 is limited to a preset opening angle. When the door body 2 is suspended at a preset opening angle, it is convenient for users to take and put items. For the phenomenon of violent door opening, even if the door opening force overcomes the hovering force between the shaft 33 and the limiting groove 5, the existence of the limiting groove 5 will slow down the opening speed of the door body 2, thus playing a buffering role against violent door opening.

Specifically, the limiting groove 5 is provided in the second groove body 344. At this time, the shaft body 33 matched with the limiting groove 5 refers to the second shaft body 333. Since the second shaft body 333 moves unidirectionally in the second groove body 344 during the door opening or closing process, it is more conducive to accurately controlling the preset opening angle.

Specifically, the preset opening angle is not less than 90°. Of course, this is not limited to this.

Furthermore, when the door body 2 is in the process of continuing to open from the third opening angle to the maximum opening angle, the movable hinge 32 cooperates with the fixed hinge 31 to drive the door body 2 to rotate in situ relative to the box body 1 to further open the door body 2.

Specifically, as shown in FIG7 , the second slot body 344 further includes a fourth segment L6 located between the third segment and the fourth end L2, and the fourth segment L6 is an arc slot with the pivot position A3 as the center. As shown in FIG7 , when the door body 2 is in the process of continuing to open from the third opening angle to the maximum opening angle, the first shaft body 332 is maintained at the pivot position A3, and the second shaft body 333 moves in the fourth segment L6, so that the door body 2 rotates in situ with the first shaft body 332 located at the pivot position A3 as the axis to further open the door.

It can be understood that when the door body 2 is opened from the closed state to the first opening angle, since the door body 2 rotates in situ relative to the box body 1, the pivot end of the door body 2 will slightly protrude from the box body 1 toward the pivot side 311 along the second direction Y. When the door body 2 continues to open from the first opening angle to the second opening angle, the displacement of the door body 2 along the first direction X can offset all parts of the door body 2 protruding from the box body 1 along the second direction Y during the entire rotation process, and then when the door body 2 continues to open from the second opening angle to the third opening angle, the displacement of the door body 2 along the second direction Y can prevent the door body 2 from protruding from the box body 1 and ensure the opening of the box body 11 as much as possible.

Specifically, the limiting groove 5 is provided in the second section L4 and/or the third section L5 and/or the fourth section L6. That is, the position of the limiting groove 5 is set according to the position corresponding to the specific preset opening angle.

It can be known that, as shown in Figure 8, after the second axis 333 cooperates with the limiting groove 5 to make the door body 2 hover at the preset opening angle, if it is necessary to further increase the opening angle of the door body 2, the door body 2 can be further opened to make the second axis 333 disengage from the limiting groove 5, thereby further increasing the opening angle of the door body 2 to the maximum opening angle.

Further, as shown in FIG2 , the mating end 331 is in an outwardly convex hemispherical shape, which can enhance the smoothness of the mating between the mating end 331 and the corresponding groove bottom 341 and the concave-convex structure during the opening and closing of the door body 2 , making it easier to open and close the door body 2 .

Specifically, when the concave-convex structure is disposed in the second groove body 344 , the mating end 331 refers to the end of the second shaft body 333 ; when the concave-convex structure is disposed in the first groove body 343 , the mating end 331 refers to the end of the first shaft body 332 .

In summary, the lower hinge assembly 3 in the present invention, by setting a concave-convex structure matching with the shaft body 33 on the groove bottom 341, under the action of the self-weight of the door body 2, the matching end 331 of the shaft body 33 will abut against the concave-convex structure of the groove bottom 341, so that the shaft body 33 can be positioned to position the door body 2 at a preset position, such as limiting it to a preset opening angle or limiting it to a closed state; or under the self-weight of the door body 2, the shaft body 33 can be guided to achieve power-assisted door closing or power-assisted door opening, thereby achieving the effect of saving effort.

It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

A lower hinge assembly comprises a fixed hinge part fixed on a box body, and a movable hinge part fixed on a door body and movably connected to the fixed hinge part, wherein a shaft body and a groove body matched with the shaft body are provided between the fixed hinge part and the movable hinge part, and when the movable hinge part rotates and opens in a direction away from the fixed hinge part, the shaft body and the groove body cooperate to drive the movable hinge part to translate along a preset trajectory; it is characterized in that: the bottom of the groove body has a concave-convex structure, and when the movable hinge part rotates relative to the fixed hinge part, the matching end of the shaft body located in the groove body cooperates with the concave-convex structure.
The lower hinge assembly as described in claim 1 is characterized in that: the groove body has a closing section, when the movable hinge component rotates from a preset closing angle toward the fixed hinge component to close to a closed state, the shaft body moves along the closing section, and the mating end of the shaft body abuts against the groove bottom of the closing section, and the concave-convex structure includes a groove bottom located in the closing section; the closing section includes a first end and a second end opposite to each other, when the movable hinge component is closed to a preset closing angle, the shaft body is located at the second end, and when the movable hinge component is in a closed state, the shaft body is located at the first end, and from the second end toward the first end, the groove bottom of the closing section extends obliquely in the depth direction of the groove body.
The lower hinge assembly according to claim 2, wherein the preset closing angle is 15°.
The lower hinge assembly according to claim 2 is characterized in that: the shaft body includes a first shaft body and a second shaft body, the groove body includes a first groove body matched with the first shaft body and a second groove body matched with the second shaft body; the fixed hinge has a pivot side, and the direction away from the pivot side from the center of the fixed hinge is the first direction; the first groove body includes an initial position and a first stop position, and the second groove body includes a third end and a fourth end that are relatively arranged, and a first section and a second section that are located between the third end and the fourth end and connected; when the movable hinge is in a closed state, the first shaft body is located at the initial position, and the second shaft body is located at the third end; when the movable hinge is opened from the closed state to the first opening angle, the first shaft body remains in the initial position, and the second shaft body moves in the first section with the first shaft body as the center; when the movable hinge continues to open from the first opening angle to the second opening angle, the second shaft body moves in the second section and drives the first shaft body to move from the initial position to the first stop position, driving the movable hinge to translate along the first direction; the closed section is located in the first section.
The lower hinge assembly as described in claim 4 is characterized in that: the concave-convex structure also includes a guiding slope located on the side of the initial position toward the first stop position, and the guiding slope extends obliquely in the depth direction of the groove body from the first stop position toward the initial position to the initial position; when the movable hinge component rotates toward the fixed hinge component and closes until the first axis body is located at the initial position, the second axis body is located at the second end.
The lower hinge assembly as described in claim 1 is characterized in that: the concave-convex structure includes a limiting groove, and after the movable hinge component is rotated and opened in a direction away from the fixed hinge component until the shaft body is located in the limiting groove, the movable hinge component is limited to a preset opening angle.
The lower hinge assembly according to claim 6, wherein the preset opening angle is not less than 90°.
The lower hinge assembly as described in claim 6 is characterized in that: the shaft body includes a first shaft body and a second shaft body, the groove body includes a first groove body matched with the first shaft body and a second groove body matched with the second shaft body; the first groove body includes an initial position, a first stop position, and a pivot position located on the side of the initial position away from the first stop position, the second groove body includes a third end and a fourth end arranged oppositely, when the movable hinge is in a closed state, the first shaft body is located at the initial position, and the second shaft body is located at the third end, when the movable hinge is rotated to open to the maximum opening angle, the second shaft body moves along the second groove body from the third end to the fourth end, driving the first shaft body to reciprocate in the first groove body; the limit groove is arranged in the second groove body.
The lower hinge assembly according to claim 1, wherein the mating end is in an outwardly convex hemispherical shape.
A built-in refrigerator comprises a box body and a door body for opening or closing the box body; the characteristic is that the built-in refrigerator also comprises a lower hinge assembly as claimed in claim 1 for movably connecting the door body to the box body.