Refrigerator

Abstract

The application provides a refrigerator, which comprises a cabinet, a storage device; the storage device comprises a shell, a storage unit and a locking unit; the locking unit comprises a first matching part and a second matching part; the first matching part comprises a connecting part rotatably connected with the shell and a locking part located on the side of the connecting part away from the back wall of the shell; the second matching part comprises a movable part rotatably connected with the storage unit and a locking part provided on the movable part and having a locking surface; when the storage unit is pushed into the shell, the second matching part acts on the first matching part to drive the first matching part to move, so that the locking part and the locking surface are locked, the locking part is matched with the locking surface and located on the side of the locking surface away from the back wall of the shell; wherein, along the direction from the top wall of the shell to the bottom wall of the shell, the locking surface extends to the side close to the back wall of the shell. The locking unit of the application is locked under the action of the pushing force of the storage unit pushed into the shell, so as to complete the locking of the shell and the storage unit, and the operation is convenient.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a refrigerator. Background Technology

[0002] A refrigerator is an essential household appliance, and its storage containers are an important part of the refrigerator.

[0003] Storage containers can preserve food, preventing spoilage and waste, and bringing great convenience to people's lives. Currently, locking mechanisms are used on storage containers to achieve sealing or low-pressure performance. One common locking mechanism involves using a lever to lock or unlock. To open the storage container, the user lifts the lever to unlock it. To close the container, the user presses down the lever to lock it.

[0004] In everyday life, it often happens that the refrigerator door is closed directly without the storage container being fully closed. In this case, the refrigerator door is closed directly without the lever being locked and reset, causing the refrigerator door to collide with the storage container and resulting in damage to the refrigerator door or the storage container. Summary of the Invention

[0005] This application provides a refrigerator in which the locking unit is configured such that the first mating part on the shell and the second mating part on the storage unit automatically lock under the action of the pushing force that pushes the storage unit into the shell. The action of pushing the door completes both the pushing and locking operations, making it convenient to operate.

[0006] In a first aspect, a refrigerator is provided, comprising: The enclosure defines the storage space; A storage device, which is housed within the storage chamber; The storage device includes: case; The storage unit can be pulled out or pushed into the housing; Locking unit, comprising: The first coordination unit includes: The connecting part is rotatably connected to the housing; A locking part is located on the side of the connecting part away from the rear wall of the housing; The second coordination unit includes: The movable part is rotatably connected to the storage unit; A locking part is provided on the movable part; the locking part has a locking surface for cooperating with the locking part; When the storage unit is pushed into the housing, the second mating part acts on the first mating part, causing the first mating part to move, so that the locking part and the locking part lock together; When the locking part is locked with the locking part, the locking part cooperates with the locking surface and is located on the side of the locking surface away from the rear wall of the housing; wherein, along the direction from the top wall of the housing to the bottom wall of the housing, the locking surface extends to the side close to the rear wall of the housing.

[0007] The above technical solution ensures that when the storage unit is pushed into the housing, the second mating part actively acts on the first mating part, causing the first mating part to move and automatically lock the locking part. No additional manual locking is required, achieving a seamless, push-in-and-lock operation that greatly improves ease of use. This avoids the problem of users forgetting to manually lock, ensuring that the storage unit is always locked after being pushed back in. When the refrigerator is moved, transported, or subjected to impacts or tilting, it reliably prevents the storage unit from accidentally sliding out due to inertia, avoiding the risk of items scattering and damage, and potential personal injury. It also prevents damage to the storage unit or refrigerator door caused by the refrigerator door closing when the storage unit is not properly locked.

[0008] Furthermore, in the above technical solutions, when the locking part mates with the locking surface, it is located on the side of the locking surface away from the rear wall of the housing, and the locking surface extends towards the rear wall along the direction from the top wall to the bottom wall. When the storage unit is subjected to an outward pulling force, the locking part will press more tightly against the locking surface due to geometric constraints, forming a self-locking effect. The above-mentioned inclined locking surface converts the force of pulling out the storage unit into a positive pressure of the locking part on the locking surface, enhancing locking stability and preventing accidental unlocking due to vibration or tilting.

[0009] In some embodiments of this application, the angle between the locking surface and the plane containing the top wall of the housing is denoted as the first angle α, where α ≤ 87°, and the projection is made in a plane perpendicular to the rotation axis of the movable part.

[0010] In the above technical solution, the locking part is located on the side of the locking surface away from the rear wall of the housing, which is equivalent to the locking part hooking onto the outside of the locking surface (closer to the user). When the storage unit is subjected to an outward pulling force, pressure is generated between the locking part and the locking surface, and this pressure is perpendicular to the locking surface. Because the locking surface is inclined (α<90°), the horizontal component of the pulling force will cause the locking part to press more tightly against the locking surface, while generating a self-locking effect of friction and normal force. If α = 90° (vertical), there is no self-locking, and only friction resists pull-out; when α ≤ 87°, the inclined surface generates geometric self-locking, which has a stronger ability to resist accidental pull-out. The above configuration enhances the locking reliability of the locking part and the locking mechanism, preventing the storage unit from accidentally sliding out due to vibration or accidental pulling.

[0011] In some embodiments of this application, the locking part includes a locking pin for engaging with the locking surface; Projecting the lock surface onto a plane perpendicular to the rotation axis of the movable part, the normal to the lock surface is denoted as the first normal; the straight line containing the rotation axis of the locking part and the central axis of the locking pin is denoted as the first straight line; the intersection of the first normal and the first straight line is denoted as intersection point A; and the point on the first normal located on the side away from the rear wall of the housing from intersection point A is denoted as the first line point B. Wherein, point B on the first line is located on the side of the first straight line away from the top wall of the shell.

[0012] In the above technical solution, when the locking pin contacts the locking surface, the contact pressure is along the direction of the first normal (from the locking surface towards the locking pin or vice versa, depending on the object applying the force). The direction of the first normal extends away from the rear wall of the housing and close to the bottom wall of the housing. Therefore, when the locking pin presses on the locking surface, if the storage unit is pulled outward, there is a downward component of the pressure direction (or reaction force direction) of the locking surface on the locking pin. This downward component of the force will resist the tendency of the locking pin to lift up and detach from the locking surface, thereby preventing the locking part from accidentally disengaging and forming a self-locking mechanism.

[0013] In some embodiments of this application, the point on the first straight line located on the side of the intersection point A away from the rear wall of the housing is denoted as the second line point C; wherein, ∠BAC ≥ 3°.

[0014] In the above technical solution, during locking, the locking pin contacts the locking surface, and the contact pressure is along the normal BA direction (from the locking surface to the locking pin or vice versa). The direction of the first straight line AC represents the geometric axis direction of the first mating part (locking part) (connecting the swing axis and the locking pin axis). The limitation of ∠BAC ≥ 3° makes the contact pressure direction inconsistent with the direction of the first straight line AC, generating a torque that causes the first mating part to rotate around its rotation center axis. Since point B is located on the side of the first straight line away from the top wall, BA is lower than CA. Therefore, the direction of the torque should be to cause the locking part to rotate in a deeper locking direction (i.e., the direction that tightens more as it is pulled). The above settings enhance the self-locking effect. When the storage unit is pulled by external force, the locking pin presses more tightly against the locking surface, making it difficult to rotate and unlock.

[0015] In some embodiments of this application, when the locking part and the locking part are locked together, the first straight line is parallel to the top wall of the housing.

[0016] In the above technical solution, the first straight line is parallel to the top wall of the housing, ensuring that the line connecting the center of the locking pin and the swing axis remains horizontal. Since the angle between AB and the horizontal line AC (the first straight line) is ≥3°, the direction of the first normal AB is downward. Because the direction of the first normal is away from the rear wall of the housing and closer to the bottom wall, the force between the locking pin and the locking surface will generate a counterclockwise or clockwise torque. This torque tends to cause the locking part to rotate downward (or to make the locking pin press more firmly against the locking surface), thus generating a self-locking torque during locking and preventing a situation where the locked state is balanced but unstable.

[0017] In some embodiments of this application, the first mating part includes: A first swing portion extends from the connecting portion toward a first turning position in a direction close to the locking portion and away from the first straight line; The second swing portion extends from the first turning position toward the locking portion in a direction away from the connecting portion and toward the first straight line; The first turning position is located on the side of the first straight line near the top of the housing.

[0018] In the above technical solution, when the storage unit is closed, the second mating part first contacts the locking part and pushes the first mating part to rotate, forming a buffer phase at the beginning of their interaction. This converts the direct impact into the rotational kinetic energy of the first mating part, consuming some of the impact force and making the closing action smoother and quieter. In addition, the rotational buffer absorbs most of the energy, reducing hard collisions and wear between components and extending the service life of the locking unit.

[0019] In some embodiments of this application, the locking portion includes a locking recess; The locking recess includes a first opening, which faces upward; The wall surface of the locking recess near the rear wall of the housing is the locking surface; The locking part enters the locking recess through the first opening and engages with the locking surface to lock the first engaging part and the second engaging part.

[0020] In the above technical solution, the first opening of the locking recess faces upwards, while the locking part of the first mating part enters from above and engages within the locking recess. The upward-facing locking recess forms a hook or slot structure. Once the locking part of the first mating part falls into it, it must complete a vertical upward movement to disengage. However, in the normally closed state, the storage unit and the housing restrict the physical space for this vertical upward movement of the first mating part. Therefore, without actively operating the unlocking part, the structure is mechanically self-locking. In the above technical solution, the locking state is guaranteed by purely geometric constraints. As long as the structure is not damaged, the locking state will not be accidentally released by external force, fundamentally avoiding the risk of the drawer sliding out on its own.

[0021] In some embodiments of this application, the movable part includes a locking connection end rotatably connected to the storage unit and a locking free end provided with the locking part; The locking recess includes: A locking bottom surface is disposed opposite to the first opening; the locking surface is connected to the side of the locking bottom surface away from the locking connection end; The second locking side is connected to the side of the locking bottom surface near the locking connection end; The third locking side is connected to the locking bottom surface, the locking surface, and the side of the second locking side away from the housing; The second opening is disposed opposite to the third locking side and is connected to the first opening.

[0022] In the above technical solution, the second opening is opposite to the third locking side and communicates with the first opening. The second opening reduces the constraint and pressure from the side on the locking part during the initial stage of rotation of the movable locking plate, reducing friction and making the opening feel light and smooth. In addition, the second opening provides more degrees of freedom for the locking part, which can prevent the locking part from getting stuck with the locking part due to misalignment or other reasons.

[0023] In some embodiments of this application, the second mating part includes a guide part, which is disposed on the side of the locking part near the rear wall of the housing; During the process of the storage unit being pushed into the housing, the guide portion acts on the locking portion to cause the first mating portion to rotate along the first direction toward the side closer to the top wall of the housing; After the locking part rotates to the first position, the second mating part continues to approach the rear wall of the housing, the guide part separates from the locking part, the first mating part rotates in a direction opposite to the first direction, and the locking part locks with the locking part.

[0024] In the above technical solution, during the process of pushing the storage unit in, at the initial contact between the second mating part and the first mating part, the guide part of the second mating part actively acts on the locking part of the first mating part, forcibly driving it to rotate in the first direction. This is an active guiding stage, which effectively converts the linear kinetic energy of the storage unit being pushed in into the kinetic energy of the rotation of the first mating part through the inclined or curved surface (guide part), reserving potential energy for subsequent locking. This setup, by initiating the locking process through forced guidance rather than hard impact, makes the initial contact very smooth, requiring only a small force from the user to initiate the process, and avoids impact noise.

[0025] Secondly, a refrigerator is provided, comprising: The enclosure defines the storage space; A storage device, which is housed within the storage chamber; The storage device includes: case; The storage unit can be pulled out or pushed into the housing; Locking unit, comprising: The first coordination unit includes: The connecting part is rotatably connected to the housing; A locking part is located on the side of the connecting part away from the rear wall of the housing; The second coordination unit includes: The movable part is rotatably connected to the storage unit; A locking part is provided on the movable part; the locking part has a locking surface for cooperating with the locking part; When the storage unit is pushed into the housing, the second mating part acts on the first mating part, causing the first mating part to move, so that the second mating part and the first mating part lock together. The locking part engages with the locking surface and is located on the side of the locking surface away from the rear wall of the housing. Projecting the lock surface onto a plane perpendicular to the rotation axis of the movable part, the normal to the lock surface is denoted as the first normal; the straight line containing the rotation axis of the locking part and the central axis of the locking part is denoted as the first straight line; the intersection of the first normal and the first straight line is denoted as intersection point A; and the point on the first normal located on the side of intersection point A away from the rear wall of the housing is denoted as the first line point B. Wherein, point B on the first line is located on the side of the first straight line away from the top wall of the shell.

[0026] The above technical solution ensures that when the storage unit is pushed into the housing, the second mating part actively acts on the first mating part, causing the first mating part to move and automatically lock the locking part. No additional manual locking is required, achieving a seamless, push-in-and-lock operation that greatly improves ease of use. This avoids the problem of users forgetting to manually lock, ensuring that the storage unit is always locked after being pushed back in. When the refrigerator is moved, transported, or subjected to impacts or tilting, it reliably prevents the storage unit from accidentally sliding out due to inertia, avoiding the risk of items scattering and damage, and potential personal injury. It also prevents damage to the storage unit or refrigerator door caused by the refrigerator door closing when the storage unit is not properly locked.

[0027] Furthermore, when the locking pin contacts the locking surface, the contact pressure is along the direction of the first normal (from the locking surface towards the locking pin or vice versa, depending on the object to which the force is applied). The direction of the first normal extends away from the rear wall of the housing and closer to the bottom wall of the housing. Therefore, when the locking pin presses against the locking surface, if the storage unit is pulled outward, there is a downward component of the pressure direction (or reaction force direction) of the locking surface on the locking pin. This downward component of the force will resist the tendency of the locking pin to lift up and disengage from the locking surface, thereby preventing the locking part from accidentally disengaging and forming a self-locking mechanism. Attached Figure Description

[0028] Figure 1 An exemplary schematic diagram of the overall structure of a refrigerator according to some embodiments is shown; Figure 2 An exemplary schematic diagram of a storage device in a closed state according to some embodiments is shown; Figure 3 An example is shown Figure 2 A magnified view of a portion of region A in the middle; Figure 4 An exemplary schematic diagram of a storage device in the process of being opened, according to some embodiments, is shown; Figure 5 An exemplary schematic diagram of a partial structure at the engagement point of the first mating part and the second mating part when the storage device according to some embodiments is in a locked state; Figure 6 An exemplary schematic diagram of a partial structure at the first mating portion when the storage device according to some embodiments is in an unlocked state; Figure 7 An exemplary schematic diagram of the structure of the first mating part of the storage device according to some embodiments is shown; Figure 8 An exemplary schematic diagram of the structure of the second mating part of the storage device according to some embodiments is shown; Figure 9An exemplary schematic diagram of the structure of the second mating part of the storage device according to some embodiments is shown from another perspective; Figure 10 An exemplary schematic diagram of the structure of the second mating part of the storage device according to some embodiments is shown from another perspective; Figure 11 An exemplary schematic diagram of the structure of the second mating part of the storage device according to some embodiments is shown from another perspective; Figure 12 An exemplary schematic diagram of the storage device according to some embodiments is shown when the first mating part and the second mating part initially come into contact during the pushing process; Figure 13 An exemplary schematic diagram is shown of the structure of the storage device according to some embodiments when the first mating part moves to the first position under the action of the second mating part during the pushing process; Figure 14 An exemplary schematic diagram of the storage device according to some embodiments is shown when the first and second mating parts are locked during the insertion process.

[0029] Among them, refrigerator 100; cabinet 101; cabinet door 102; Storage device 1; Casing 2; Storage chamber 21; Storage port 22; Storage unit 3; Locking unit 4; First mating part 5; connecting part 5a; locking part 5b; first swing part 51; first swing surface 511; second swing part 52; first turning position 53; Second mating part 6; Locking connection end 6a; Locking free end 6b; Movable part 61; Locking part 62; Locking bottom surface 620; Locking surface 621; Second locking side surface 622; Third locking side surface 623; Guiding section 63; Unlock section 7. Detailed Implementation

[0030] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0031] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0032] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0033] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0034] Please refer to Figures 1-14 As shown, the refrigerator 100 includes a cabinet 101 having a storage compartment, a door 102 connected to the cabinet 101 for opening and closing the storage compartment, and a refrigeration device for supplying cold air to the storage compartment. The cabinet 101 includes an inner liner defining the storage compartment, an outer shell connected to the outside of the inner liner to form the appearance of the refrigerator 100, and a heat insulation layer disposed between the inner liner and the outer shell to insulate the storage compartment.

[0035] In some embodiments of this application, a retrieval opening is formed at the front end of the storage compartment to allow for placing stored items into or retrieving stored items from the storage compartment. For example... Figure 1 As shown, the door 102 is connected to the box body 101 to open or close the access port of the storage room.

[0036] The refrigerator 100 is provided with a storage device 1. The storage device 1 is housed within a storage compartment. The storage device 1 defines and provides a storage space for storing items. The storage device 1 includes a housing 2 defining a storage compartment 21 and having a storage opening 22, and a storage unit 3 that can be pushed into or pulled out of the storage compartment 21 defined by the housing 2. When the storage unit 3 is pushed into the storage compartment 21, the storage opening 22 is closed.

[0037] In some embodiments of this application, the storage space of the storage device 1 is connected to the storage room in which it is located, that is, the air pressure of the storage space of the storage device 1 is balanced with the air pressure of the storage room in which it is located.

[0038] In some embodiments of this application, the storage device 1 can be maintained in a low-pressure state. Specifically, the storage device 1 can be isolated from the storage compartment so that the air pressure inside the storage device 1 is lower than the atmospheric pressure of its surrounding environment. The refrigerator 100 includes a vacuum device (not shown) for extracting gas from the storage device 1 to create a low-pressure state inside the storage device 1. The aforementioned low-pressure state is when the air pressure inside the storage device 1 is lower than the atmospheric pressure outside the cabinet 101.

[0039] Please refer to some embodiments of this application. Figures 2-5As shown, the storage device 1 includes a locking unit 4. The locking unit 4 includes a first mating part 5, which is disposed on the housing 2.

[0040] The locking unit 4 includes a second mating part 6; the second mating part 6 is disposed on the storage unit 3 and is used to cooperate with the first mating part 5 when the storage unit 3 is pushed into the housing 2, so as to drive the first mating part 5 to move, so as to lock the second mating part 6 and the first mating part 5.

[0041] The first mating part 5 includes a connecting part 5a, which is rotatably connected to the housing 2. The first mating part 5 also includes a locking part 5b, which is located on the side of the connecting part 5a away from the rear wall of the housing 2.

[0042] The second mating part 6 includes a movable part 61; the movable part 61 is rotatably connected to the storage unit 3. The second mating part 6 includes a locking part 62, which is provided on the movable part 61; the locking part 62 has a locking surface 621 for engaging with the locking part 5b.

[0043] When the storage unit 3 is pushed into the housing 2, the second mating part 6 acts on the first mating part 5, causing the first mating part 5 to move so that the locking part 5b and the locking part 62 lock together. When the locking part 5b and the locking part 62 are locked together, the locking part 5b engages with the locking surface 621 and is located on the side of the locking surface 621 away from the rear wall of the housing 2; wherein, along the direction from the top wall of the housing 2 to the bottom wall of the housing 2, the locking surface 621 extends towards the side closer to the rear wall of the housing 2.

[0044] In the above technical solution, when the locking part 5b cooperates with the locking surface 621, it is located on the side of the locking surface 621 away from the rear wall of the housing 2, and the locking surface 621 extends towards the rear wall along the direction from the top wall to the bottom wall. When the storage unit 3 is subjected to an outward pulling force, the locking part 5b will press more tightly against the locking surface 621 due to geometric constraints, forming a self-locking effect. The inclined locking surface converts the force of pulling out the storage unit 3 into a positive pressure of the locking part 5b on the locking surface 621, enhancing locking stability and preventing accidental unlocking due to vibration or tilting.

[0045] Furthermore, the obliquely extending locking surface 621 allows the inclined locking surface 621 of the second mating part 6 to guide the first mating part 5 at an angle during the insertion of the storage unit 3, so that the interaction between the two can smoothly transition to the locked position. This makes the insertion process smooth, reduces impact noise and wear, and improves the life of the components.

[0046] When the storage unit 3 is pushed into the housing 2, the second mating part 6 first contacts the first mating part 5 under the pushing force of the storage unit 3. During further relative movement, the second mating part 6 drives the first mating part 5 to move, locking it with the first mating part 5 when the storage opening 22 is closed. This automatically locks the locking part 5b and the locking part 62, eliminating the need for manual locking and achieving a seamless, push-in-and-lock operation, greatly improving ease of use. This avoids the problem of users forgetting to manually lock, ensuring that the storage unit 3 is always locked after being pushed back. When the refrigerator 100 is moved, transported, or subjected to impact or tilting, it reliably prevents the storage unit 3 from accidentally sliding out due to inertia, avoiding the risk of items scattering and damage, and potential personal injury. It also prevents damage to the storage unit 3 or the refrigerator 100 door from impact when the refrigerator door closes due to the storage unit 3 not being locked in place.

[0047] In some embodiments of this application, the locking unit 4 includes an unlocking part 7; the unlocking part 7 is disposed on the storage unit 3 and is used to drive the second mating part 6 to move when the storage unit 3 is pulled out, so that the second mating part 6 is unlocked from the first mating part 5.

[0048] When it is necessary to open the storage unit 3, an operating force is applied to the unlocking part 7 to drive its movement. The unlocking part 7 then drives the second engaging part 6 to move, causing the second engaging part 6 to disengage from the first engaging part 5, thereby unlocking the storage unit 3 from the housing 2. The storage unit 3 is then pulled out. In this technical solution, the unlocking part 7 is located on the storage unit 3, and its function (driving the second engaging part 6 to unlock) is triggered when the storage unit 3 is pulled out. The user's natural action of pulling out the storage unit 3 (such as pulling the handle of the storage unit 3) is itself the trigger condition for unlocking. The unlocking and opening are a continuous action. The user does not need to first find and operate a separate unlocking button before pulling the storage unit 3. The user's operation to open the storage unit 3 directly completes the unlocking, resulting in high user interaction efficiency with the storage unit. By binding the unlocking trigger mechanism with the user's pulling-out operation, one action completes two operations, simplifying the user's operation steps.

[0049] The above technical solution clearly distinguishes the driving relationship of force in the locking and unlocking processes. During locking, the locking force comes from the kinetic energy of pushing in the storage unit 3. The second mating part 6 acts as the driving member, driving the first mating part 5 (the driven member) to move, ultimately achieving interlocking between the first mating part 5 and the second mating part 6. During unlocking, the unlocking force comes from the operation of pulling out the storage unit 3. The unlocking part 7 acts as the driving member, driving the second mating part 6 to move, achieving separation between the first mating part 5 and the second mating part 6. The storage device 1 has a clear relationship between the driving and driven members, making the force and motion transmission path clear, reducing uncertainty and failure rate during operation, and improving the durability and stability of the mechanism. In the locked state, because the first mating part 5 and the second mating part 6 cooperate to lock, the force is reasonable, capable of withstanding greater impact force, and the locking effect is reliable.

[0050] In some embodiments of this application, the angle between the locking surface 621 and the plane containing the top wall of the housing 2, projected onto a plane perpendicular to the rotation axis of the movable part 61, is denoted as the first included angle α, where α ≤ 87°.

[0051] In the above technical solution, the locking part 5b is located on the side of the locking surface 621 away from the rear wall of the housing 2, which is equivalent to the locking part 5b hooking onto the outside of the locking surface 621 (closer to the user side). When the storage unit 3 is subjected to an outward pulling force, pressure is generated between the locking part 5b and the locking surface 621, and this pressure is perpendicular to the locking surface 621. Because the locking surface 621 is inclined (α<90°), the locking part 62 applies a force F to the locking part 5b along the normal direction of the locking surface 621, where F can be decomposed into a first component force F1 along the first straight line direction and a second component force F2 perpendicular to the first straight line. Among them, the first component force F1 presses the locking part 5b and the locking surface 621 together and increases the friction between them; the second component force F2 (when >0) has a tendency to make the locking part 5b rotate downward or upward. When the second component force F2 is downward, the locking part 5b tends to rotate clockwise, further pressing the locking part 5b against the locking surface, preventing the locking part 5b from disengaging from the locking part 62 and achieving self-locking. Conversely, if the second component force F2 is upward, the locking part 5b tends to rotate counterclockwise, loosening the locking part 5b from the locking surface, causing the locking part 5b to disengage from the locking part 62, and preventing locking from being completed.

[0052] If α = 90°, the second component force F2 is 0, then there is no self-locking, and the pull-out is resisted only by friction. When α > 87°, on the one hand, the second component force F2 is downward, but its force is small, its self-locking effect is weak, and it cannot effectively resist unexpected pulling forces, etc., resulting in poor locking reliability of the locking part 5b and the locking part 62. On the other hand, when it is necessary to unlock and remove the storage unit 3, the locking part 5b needs to slide out relative to the locking surface 621. At this time, α is close to 90°, and the locking part 5b and the locking surface 621 may form an approximately perpendicular fit, which may require a great deal of force to unlock.

[0053] When α ≤ 87°, the inclined surface generates a geometric self-locking mechanism, which strengthens its resistance to accidental pull-out. This design enhances the locking reliability of the locking part 5b and the locking part 62, preventing the storage unit 3 from accidentally sliding out due to vibration or accidental pulling.

[0054] On the other hand, the force exerted by the locking surface 621 on the locking part 5b can be decomposed into a component force perpendicular to the locking surface 621 and a component force along the locking surface 621, which may drive the first mating part 5 to rotate naturally to unlock, making the unlocking operation more controllable, reducing the maximum pulling force required, and avoiding jamming in the locked position.

[0055] Furthermore, when the storage unit 3 is pushed into the housing 2, the locking surface 621 of the second mating part 6 (which moves with the storage unit 3) will contact the locking part 5b of the first mating part 5. Since the locking surface 621 is inclined backward and downward (in the projection, it is inclined backward), the locking part 5b will be pushed by the locking surface 621 and rotate (around the connecting part 5a) upon contact. The setting of the tilt angle α ≤ 87° makes the slope of the locking surface 621 gentle, avoiding excessive impact or the need for a large pushing force on the locking part 5b in the initial stage of pushing in, making the process of pushing in the storage unit 3 easier and smoother, and reducing noise and wear.

[0056] Please refer to some embodiments of this application. Figure 5 As shown, the locking part 62 includes a locking pin for engaging with the locking surface 621.

[0057] Projected onto a plane perpendicular to the rotation axis of the movable part 61, the normal to the locking surface 621 is denoted as the first normal. Figure 5 (The blue line represents the middle section).

[0058] The straight line between the rotation axis of the locking part 5b and the central axis of the locking pin is denoted as the first straight line. Figure 5 (Represented by the red line in the middle).

[0059] The intersection of the first normal and the first straight line is denoted as intersection point A, and the point on the first normal located on the side of intersection point A away from the rear wall of the shell 2 is denoted as the first line point B; wherein, the first line point B is located on the side of the first straight line away from the top wall of the shell 2.

[0060] In the above technical solution, when the locking pin contacts the locking surface 621, the contact pressure is along the first normal direction (from the locking surface 621 towards the locking pin or vice versa, depending on the object applying the force). The first normal extends away from the rear wall of the housing 2 and close to the bottom wall of the housing 2. When the locking pin presses on the locking surface 621, if the storage unit 3 is pulled outward, the direction of the pressure (or the direction of the reaction force) of the locking surface 621 on the locking pin has a downward component. This downward component will resist the tendency of the locking pin to lift up and detach from the locking surface 621, thereby preventing the locking part 5b from accidentally disengaging and forming a self-locking mechanism.

[0061] In a vibrating environment (transportation, handling, etc.), if the locking pin tends to slide along the locking surface 621, since the first normal points away from the rear wall of the housing 2 and closer to the bottom wall of the housing 2, the locking pin will move downwards (locking direction) along the locking surface 621 during sliding, rather than upwards (disengagement direction). Therefore, vibration may actually make the locking more secure. The above geometric relationship eliminates the possibility of unlocking caused by vibration and improves the reliability of locking.

[0062] In some embodiments of this application, the point on the first straight line located on the side of the intersection point A away from the rear wall of the housing 2 is denoted as the second line point C; wherein, ∠BAC ≥ 3°.

[0063] In the above technical solution, when locked, the locking pin contacts the locking surface 621, and the contact pressure is along the normal BA direction (from the locking surface 621 to the locking pin or vice versa). The direction of the first straight line AC represents the geometric axis direction of the first mating part 5 (locking part 5b) (connecting the swing axis and the locking pin axis). The limitation of ∠BAC ≥ 3° makes the contact pressure direction inconsistent with the direction of the first straight line AC, which will generate a torque that causes the first mating part 5 to rotate around its rotation center axis. Since point B is located on the side of the first straight line away from the top wall, BA is lower than CA. Therefore, the direction of the torque should be to cause the locking part 5b to rotate in a deeper locking direction (i.e., the direction that tightens more as it is pulled). The above settings enhance the self-locking effect. When the external force pulls the storage unit 3, the locking pin presses more tightly on the locking surface 621, making it difficult to rotate and unlock.

[0064] If ∠BAC = 0°, the line of action of the contact force passes through the line connecting the center of the locking post and the swing axis. Then the rotational torque of the contact force on the first mating part 5 is zero. Even a slight disturbance may cause the rotation to unlock or the locking to be insecure.

[0065] If ∠BAC < 3°, the torque generated by the contact force on the first mating part 5, causing it to rotate, is too small, resulting in poor stability in the locked position. Furthermore, the locking force required to open is small, making unlocking too easy and prone to accidental opening. If ∠BAC is too small, it may deviate to 0° during manufacturing, leading to failure.

[0066] A ∠BAC ≥ 3° ensures that the contact force generates a torque in a specific direction on the first mating part 5, giving it definite stability in the locked position. Unlocking requires overcoming the self-locking torque caused by ∠BAC. A larger angle results in a larger self-locking torque, requiring greater operating force or a more precise unlocking action. Setting ∠BAC ≥ 3° prevents unlocking from being too easy due to an excessively small angle, thus avoiding accidental opening.

[0067] In addition, ∠BAC≥3° ensures that even under the worst tolerance (such as 3°), there is still sufficient torque offset to guarantee the self-locking function, improve the robustness of the design, have a certain tolerance for machining and assembly errors, and ensure the consistency of batch product quality.

[0068] Furthermore, the locking pin and locking surface 621 may wear down over time, causing slight changes in the contact point position. The setting of ∠BAC ≥ 3° ensures that even with slight changes in the contact point, the direction of the contact force can still generate a sufficiently large self-locking torque, preventing the locking function from failing due to wear, and extending the service life and long-term reliability of the locking mechanism.

[0069] In some embodiments of this application, 10° ≥ ∠BAC.

[0070] When 10° < ∠BAC, the unlocking force is too large, requiring the user to apply a large force when unlocking, which is inconvenient.

[0071] When 10° ≥ ∠BAC, the above limits prevent excessive unlocking force. These limits on the ∠BAC range balance unlocking force and self-locking reliability, ensuring both safety and usability.

[0072] Please refer to some embodiments of this application. Figure 5 As shown, when the locking part 5b and the locking part 62 are locked together, the first straight line is parallel to the top wall of the housing 2.

[0073] In the above technical solution, the first straight line is parallel to the top wall of the housing 2, ensuring that the line connecting the center of the locking pin and the swing axis remains horizontal. Since the angle between AB and the horizontal line AC (the first straight line) is ≥3°, the direction of the first normal AB is downward. Because the direction of the first normal is away from the rear wall of the housing 2 and close to the bottom wall of the housing 2, the force between the locking pin and the locking surface 621 will generate a counterclockwise or clockwise torque. This torque tends to cause the locking part 5b to rotate downward (or to make the locking pin press more firmly against the locking surface 621), thus generating a self-locking torque during locking and avoiding a situation where the locked state is balanced but unstable.

[0074] Please refer to some embodiments of this application. Figures 6-7As shown, the first mating part 5 includes a first swing part 51; the first swing part 51 extends from the connecting part 5a toward the locking part 5b and away from the first straight line to the first turning position 53. The first mating part 5 includes a second swing part 52; the second swing part 52 extends from the first turning position 53 toward the locking part 5b and away from the connecting part 5a. The first turning position 53 is located on the side of the first straight line near the top of the housing 2.

[0075] In the above technical solution, when the storage unit 3 is closed, the second mating part 6 first contacts the locking part 5b and pushes the first mating part 5 to rotate, forming a buffer phase at the beginning of their interaction. This converts the direct impact into the rotational kinetic energy of the first mating part 5, consuming some of the impact force and making the closing action smoother and quieter. In addition, the rotational buffer absorbs most of the energy, reducing hard collisions and wear between components and extending the service life of the locking unit 4.

[0076] In some embodiments of this application, the locking portion 5b is an arc surface. That is, when the second mating portion 6 interacts with the first mating portion 5, the arc surface of the locking portion 5b engages with the second mating portion 6. In a plane perpendicular to the rotation axis of the first mating portion 5, the first straight line L is the straight line between the rotation axis of the first mating portion 5 and the center of the arc.

[0077] Please refer to some embodiments of this application. Figures 8-11 As shown, the locking part 62 includes a locking recess. The locking recess includes a first opening, which faces upward. The wall surface of the locking recess near the rear wall of the housing 2 is the locking surface 621.

[0078] The locking part 5b enters the locking recess through the first opening and engages with the locking surface 621 to lock the first engaging part 5 and the second engaging part 6.

[0079] In the above technical solution, the first opening of the locking recess faces upward, and the locking part 5b of the first mating part 5 enters from above and gets stuck in the locking recess. The upward-facing locking recess forms a hook or slot structure. Once the locking part 5b of the first mating part 5 falls into it, it must complete a vertical upward movement to disengage. However, in the normally closed state, the storage unit 3 and the housing 2 restrict the physical space for the first mating part 5 to perform this vertical upward movement. Therefore, without actively operating the unlocking part 7, the structure is mechanically self-locking. In the above technical solution, the locking state is guaranteed by pure geometric constraints. As long as the structure is not damaged, the locking state will not be accidentally released by external force, fundamentally avoiding the risk of the drawer sliding out on its own.

[0080] During unlocking, the user rotates the second mating part 6 (i.e., the movable locking plate 61) via the unlocking part 7. This rotation causes the locking recess to tilt or shift, creating a lateral exit for the locking part 5b, rather than forcibly pushing it out of the upward opening. The user does not need to overcome a large vertical force to pull out the locking part 5b; instead, unlocking is achieved with less force through a clever lever and rotation principle, resulting in a better operating feel. The unlocking process is a guided separation, rather than hard friction and compression, reducing wear on components and extending their service life.

[0081] Please refer to some embodiments of this application. Figures 8-11 As shown, the movable part 61 includes a locking connection end 6a that is rotatably connected to the storage unit 3 and a locking free end 6b provided with a locking part 62.

[0082] The locking recess includes a locking bottom surface 620; the locking bottom surface 620 is disposed opposite to the first opening. The locking surface 621 is connected to the side of the locking bottom surface 620 away from the locking connection end 6a.

[0083] The locking recess includes a second locking side surface 622, which is connected to the side of the locking bottom surface 620 near the locking connection end 6a.

[0084] The locking recess includes a third locking side 623, which connects the locking bottom surface 620, the locking surface 621, and the side of the second locking side 622 away from the housing 2.

[0085] The locking recess includes a second opening, which is disposed opposite to the third locking side 623 and communicates with the first opening.

[0086] In the above technical solution, the second opening is opposite to the third locking side 623 and communicates with the first opening. The second opening reduces the constraint and pressure from the side on the locking part 5b during the initial stage of rotation of the movable locking plate, reducing friction and making the opening feel light and smooth. In addition, the second opening provides more degrees of freedom for the locking part 5b, which can prevent the locking part 5b from getting stuck with the locking part 62 due to misalignment or other reasons.

[0087] Please refer to some embodiments of this application. Figures 12-14 As shown, the second mating part 6 includes a guide part 63, which is located on the side of the locking part 62 near the rear wall of the housing 2.

[0088] During the process of the storage unit 3 being pushed into the housing 2, the guide part 63 acts on the locking part 5b to cause the first mating part 5 to rotate along the first direction toward the side closer to the top wall of the housing 2.

[0089] After the locking part 5b rotates to the first position, the second mating part 6 continues to approach the rear wall of the housing 2, the guide part 63 separates from the locking part 5b, the first mating part 5 rotates in the opposite direction to the first direction, and the locking part 5b locks with the locking part 62.

[0090] In the above technical solution, during the process of pushing the storage unit 3 in, at the initial contact between the second mating part 6 and the first mating part 5, the guide part 63 of the second mating part 6 actively acts on the locking part 5b of the first mating part 5, forcibly driving it to rotate in the first direction. This is an active guiding stage, which effectively converts the linear kinetic energy of the storage unit 3 being pushed in into the kinetic energy of the rotation of the first mating part 5 through the inclined or curved surface (guide part 63), reserving potential energy for subsequent locking. This configuration, by initiating the locking process through forced guidance rather than hard impact, makes the initial contact very smooth, requiring only a small force from the user to initiate the process, and avoids impact noise.

[0091] When the locking part 5b of the first mating part 5 rotates to the first position, the guide part 63 separates from the locking part 5b. After separation, the first mating part 5 automatically returns to its original state in the opposite direction to the first direction under its own gravity. This return action allows the locking part 5b to quickly and forcefully engage with the locking part 62, completing the locking. In this technical solution, the locking action is clear; the separation of the guide part 63 from the locking part 5b and the return of the first mating part 5 to its original state are a rapid action, ensuring a clear and tangible click sound and feel at the moment of locking, providing operational feedback to the user. Furthermore, in this technical solution, the return to its original state is achieved from previously stored energy, allowing the final locking force to be far greater than the direct pushing force applied by the user, resulting in a very secure locking effect.

[0092] The second mating part 6 is designed with three clearly defined functions: a movable part 61, a guide part 63, and a locking part 62. The movable part 61 provides a rotational connection and is the foundation of the entire component. The guide part 63 guides and drives the locking action. The locking part 62 serves as the final support and lock. Each part can be independently optimized for its specific function, thus achieving optimal overall performance. Furthermore, this clear division of functions avoids a single structure bearing too many conflicting functions, resulting in a more reasonable stress distribution, higher reliability, and reduced risk of wear and failure.

[0093] Furthermore, the locking process between the storage unit 3 and the housing 2 involves the guide part 63 forcibly guiding the locking part 5b, followed by the separation of the locking part 5b from the guide part 63, and the automatic restoration of the first mating part 5 to achieve locking. This locking process is a controlled, unidirectional process. The separation of the guide part 63 from the locking part 5b ensures that at the moment of locking completion, the guiding component (guide part 63) has already withdrawn, preventing any interference with the components (locking part 62 and locking part 5b) in the final locked state. In this technical solution, only the locking part 62 and the locking part 5b, designed for load-bearing, ultimately come into contact, resulting in a clear force transmission path and structural stability. This setup creates an either-or state: either unlocked (guide part 63 is guiding) or fully locked (guide part 63 has separated), effectively preventing a partially locked state due to insufficient closing force.

[0094] In some embodiments of this application, the guide portion 63 includes a guide surface; the guide surface extends along the direction from the locking free end 6b to the locking connection end 6a, and extends away from the side where the bottom wall of the locking recess is located.

[0095] In the above technical solution, during the insertion of the storage unit 3, the swinging free end 5b of the first mating part 5 will first contact the guide surface. Since the slope rises from low to high (from the locking free end 6b towards the locking fixed end, gradually moving away from the bottom wall), when the swinging free end 5b contacts the slope, it is actually contacting a gradually rising ramp. The horizontal pushing force is decomposed into a vertical component through this ramp. This component smoothly lifts the swinging free end 5b, thereby driving the first mating part 5 to begin rotating in the first direction. This configuration minimizes the normal pressure at the initial contact point of sliding friction and replaces the harsh collision-type relative motion with a rolling or climbing relative motion. The user experiences very little resistance when closing the storage unit 3, improving the product's quality. It is especially suitable for storage units 3 that need to be easily closed even after being loaded with heavy objects.

[0096] In some embodiments of this application, the first swing portion 51 includes a first swing surface 511 near the side of the first straight line L. When the first mating portion 5 and the second mating portion 6 are locked, the guide surface is parallel to the first swing surface 511.

[0097] In the above technical solution, the guide surface is parallel to the first swing surface 511, indicating that the movable locking plate 61 and the first swing part 51 of the first mating part 5 are in a mutually parallel alignment. This ensures that in the event of an abnormal external force (such as a violent impact on the drawer) while locked, the force will be transmitted through the parallel contact surfaces, rather than being concentrated at a single point. The parallel planar contact provides maximum support and stability, more effectively resisting and dispersing impact loads, and preventing component deformation or damage due to stress concentration. This geometric alignment ensures that the locking unit 4 is in a mechanically stable state after locking, without any torque that would cause spontaneous rotation or loosening, thus enhancing vibration resistance.

[0098] Furthermore, during unlocking, the user operates the unlocking unit 7, causing the movable locking plate 61 to rotate. At the initial moment of unlocking, since the guide surface and the first swing surface 511 are parallel, a uniform and predictable initial gap is formed between them. This uniform gap ensures that the movement of the second mating part 6 is not subject to any unintended interference from the first mating part 5 when it begins to rotate and unlock.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0100] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that, include: The enclosure defines the storage space; A storage device, which is housed within the storage chamber; The storage device includes: case; The storage unit can be pulled out or pushed into the housing; Locking unit, comprising: The first coordination unit includes: The connecting part is rotatably connected to the housing; A locking part is located on the side of the connecting part away from the rear wall of the housing; The second coordination unit includes: The movable part is rotatably connected to the storage unit; A locking part is provided on the movable part; the locking part has a locking surface for cooperating with the locking part; When the storage unit is pushed into the housing, the second mating part acts on the first mating part, causing the first mating part to move, so that the locking part and the locking part lock together; When the locking part is locked with the locking part, the locking part cooperates with the locking surface and is located on the side of the locking surface away from the rear wall of the housing; wherein, along the direction from the top wall of the housing to the bottom wall of the housing, the locking surface extends to the side close to the rear wall of the housing.

2. The refrigerator according to claim 1, characterized in that, Projected onto a plane perpendicular to the rotation axis of the movable part, the angle between the locking surface and the plane containing the top wall of the housing is denoted as the first included angle α, where α ≤ 87°.

3. The refrigerator according to claim 1 or 2, characterized in that, The locking part includes a locking pin for engaging with the locking surface; Projecting the lock surface onto a plane perpendicular to the rotation axis of the movable part, the normal to the lock surface is denoted as the first normal; the straight line containing the rotation axis of the locking part and the central axis of the locking pin is denoted as the first straight line; the intersection of the first normal and the first straight line is denoted as intersection point A; and the point on the first normal located on the side away from the rear wall of the housing from intersection point A is denoted as the first line point B. Wherein, point B on the first line is located on the side of the first straight line away from the top wall of the shell.

4. The refrigerator according to claim 3, characterized in that, The point on the first straight line located on the side away from the rear wall of the shell at the intersection point A is denoted as the second line point C; where ∠BAC ≥ 3°.

5. The refrigerator according to claim 3, characterized in that, When the locking part and the locking part are locked together, the first straight line is parallel to the top wall of the housing.

6. The refrigerator according to claim 3, characterized in that, The first mating part includes: A first swing portion extends from the connecting portion toward a first turning position in a direction close to the locking portion and away from the first straight line; The second swing portion extends from the first turning position toward the locking portion in a direction away from the connecting portion and toward the first straight line; The first turning position is located on the side of the first straight line near the top of the housing.

7. The refrigerator according to claim 1, 2, 4, or 5, characterized in that, The locking part includes a locking recess; The locking recess includes a first opening, which faces upward; The wall surface of the locking recess near the rear wall of the housing is the locking surface; The locking part enters the locking recess through the first opening and engages with the locking surface to lock the first engaging part and the second engaging part.

8. The refrigerator according to claim 7, characterized in that, The movable part includes a locking connection end that is rotatably connected to the storage unit and a locking free end provided with the locking part; The locking recess includes: A locking bottom surface is disposed opposite to the first opening; the locking surface is connected to the side of the locking bottom surface away from the locking connection end; The second locking side is connected to the side of the locking bottom surface near the locking connection end; The third locking side is connected to the locking bottom surface, the locking surface, and the side of the second locking side away from the housing; The second opening is disposed opposite to the third locking side and is connected to the first opening.

9. The refrigerator according to claim 1, 2, 4, or 5, characterized in that, The second mating part includes a guide part, which is disposed on the side of the locking part near the rear wall of the housing; During the process of the storage unit being pushed into the housing, the guide portion acts on the locking portion to cause the first mating portion to rotate along the first direction toward the side closer to the top wall of the housing; After the locking part rotates to the first position, the second mating part continues to approach the rear wall of the housing, the guide part separates from the locking part, the first mating part rotates in a direction opposite to the first direction, and the locking part locks with the locking part.

10. A refrigerator, characterized in that, include: The enclosure defines the storage space; A storage device, which is housed within the storage chamber; The storage device includes: case; The storage unit can be pulled out or pushed into the housing; Locking unit, comprising: The first coordination unit includes: The connecting part is rotatably connected to the housing; A locking part is located on the side of the connecting part away from the rear wall of the housing; The second coordination unit includes: The movable part is rotatably connected to the storage unit; A locking part is provided on the movable part; the locking part has a locking surface for cooperating with the locking part; When the storage unit is pushed into the housing, the second mating part acts on the first mating part, causing the first mating part to move, so that the second mating part and the first mating part lock together. The locking part engages with the locking surface and is located on the side of the locking surface away from the rear wall of the housing. Projecting the lock surface onto a plane perpendicular to the rotation axis of the movable part, the normal to the lock surface is denoted as the first normal; the straight line containing the rotation axis of the locking part and the central axis of the locking part is denoted as the first straight line; the intersection of the first normal and the first straight line is denoted as intersection point A; and the point on the first normal located on the side of intersection point A away from the rear wall of the housing is denoted as the first line point B. Wherein, point B on the first line is located on the side of the first straight line away from the top wall of the shell.

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