Hinge structure and refrigerator
By introducing guide grooves and damping buffer structures into the refrigerator hinge structure, the problems of impact force and noise when the refrigerator door closes are solved, achieving smooth door closure and protection of items.
Patent Information
- Application Number
- CN202423312438.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing refrigerator door is prone to generating a large impact force when closing, resulting in loud closing noise and the risk of items in the bottle rack colliding or falling out.
Design a hinge structure including a fixed base, a mounting base, and a linkage assembly. The linkage assembly consists of first and second swing rod structures, and is provided with a guide groove and a damping buffer structure. The damping buffer structure slides before the refrigerator door is closed to a preset position, and is compressed after being closed to the preset position to provide a buffering effect.
It reduces the noise when the refrigerator door closes, reduces the impact on the main body of the refrigerator, prevents items in the bottle rack from colliding and falling out, and ensures that the door closes smoothly.
Smart Images
Figure CN223964342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigerator technology, and in particular to a hinge structure and a refrigerator. Background Technology
[0002] The refrigerator body and door are mounted together by a hinge structure to ensure the door opens and closes properly. To enable automatic door closing, the hinge structure typically incorporates an elastic assist mechanism to provide driving force as the door is about to close. However, the release of the elastic potential energy of this mechanism can result in a significant impact force between the door and the refrigerator body when the door closes. This can also cause a loud noise when the user forces the door shut, and may pose risks such as items colliding with or falling out of the refrigerator door's storage compartment. Utility Model Content
[0003] The main purpose of this invention is to propose a hinge structure and a refrigerator that provides a buffering effect when the refrigerator door is closed.
[0004] To achieve the above objectives, the hinge structure proposed in this utility model includes:
[0005] Mounting bracket, used for mounting to the refrigerator body;
[0006] Mounting bracket, used for mounting on the refrigerator door;
[0007] A linkage assembly includes a first rocker arm structure and a second rocker arm structure rotatably connected. The end of the first rocker arm structure away from the second rocker arm structure is rotatably connected to a fixed base. The end of the second rocker arm structure away from the first rocker arm structure is rotatably connected to the fixed base. A guide groove is provided at the end of the first rocker arm structure near the fixed base, and the guide groove extends towards the second rocker arm structure.
[0008] The damping buffer structure has one end movably mounted in the guide groove and the other end rotatably connected to the second swing rod structure;
[0009] Before the refrigerator door is closed to the preset position, the damping buffer structure slides along the guide groove. After the refrigerator door is closed to the preset position, the damping buffer structure is compressed to provide a buffer for the closing of the refrigerator door.
[0010] In one embodiment, the first swing arm structure includes a first main swing arm and a mounting component fixed to one end of the first main swing arm near the fixed base. The guide groove is provided on the mounting component, and the first main swing arm is rotatably mounted on the fixed base.
[0011] In one embodiment, the first main swing arm is rotatably connected to the fixed base via a rotating shaft. One side of the mounting member is provided with a snap-fit notch, which is rotatably snapped into the rotating shaft, and the other side of the mounting member is snapped into the first main swing arm.
[0012] In one embodiment, the second pendulum structure includes a second main pendulum and a second auxiliary pendulum. One end of the second main pendulum is connected to the mounting base and the other end is connected to the first pendulum structure. One end of the second auxiliary pendulum is connected to the mounting base and the other end is connected to the first pendulum structure. The second auxiliary pendulum is located on the side of the second main pendulum close to the fixed base.
[0013] The end of the damping buffer structure furthest from the fixed base is rotatably connected to the second auxiliary swing arm.
[0014] In one embodiment, the first pendulum structure includes a first main pendulum and a first auxiliary pendulum. One end of the first main pendulum is connected to the fixed base, and the other end is connected to the second main pendulum and the second auxiliary pendulum. One end of the first auxiliary pendulum is connected to the fixed base, and the other end is connected to the second auxiliary pendulum.
[0015] The guide groove is located on the first main swing arm.
[0016] In one embodiment, the buffer damping structure is located on the side of the first auxiliary pendulum rod facing the first main pendulum rod.
[0017] In one embodiment, the damping buffer structure includes a damping body, a push rod slidably inserted into the damping body, and an elastic reset member. The end of the damping body away from the push rod is movably mounted in the guide groove, and the end of the push rod away from the damping body is rotatably mounted in the second swing rod structure.
[0018] The elastic reset element enables the push rod to tend to extend out of the damping body.
[0019] In one embodiment, the elastic reset member is configured as a spring, which is sleeved on the push rod, with one end of the spring connected to the damping body and the other end connected to the end of the push rod near the second swing rod structure.
[0020] In one embodiment, the elastic reset member is configured as a torsion spring, the first rocker arm structure is rotatably connected to the fixed base via a rotating shaft, the torsion spring is sleeved on the rotating shaft, one side of the torsion spring is connected to the first rocker arm structure, and the other side is connected to the end of the damping body facing the fixed base.
[0021] In one embodiment, the first rocker arm structure is rotatably connected to the fixed base via a pivot, and the guide groove is configured as an arc-shaped groove recessed relative to the pivot; or,
[0022] The guide groove is configured as a straight groove.
[0023] In one embodiment, at the preset position, the opening angle of the refrigerator door is greater than or equal to 20° and less than or equal to 30°.
[0024] This utility model also proposes a refrigerator, including the hinge structure described above.
[0025] The technical solution of this utility model involves setting a hinge structure, which includes a fixed base, a mounting base, and a connecting rod assembly. The fixed base is installed on the refrigerator body, and the mounting base is installed on the refrigerator door. The connecting rod assembly includes a first swing arm structure and a second swing arm structure. One end of the first swing arm structure is drivenly connected to the fixed base, and the other end is drivenly connected to the second swing arm structure. The end of the second swing arm structure away from the first swing arm structure is drivenly connected to the mounting base, thereby realizing the installation of the refrigerator door and the refrigerator body and enabling the refrigerator door to open and close. The end of the first swing arm structure near the fixed base has a guide groove extending towards the second swing arm structure. One end of the damping buffer structure is movably installed in the guide groove, and the other end is rotatably connected to the second swing arm structure. Assuming the refrigerator door is closed to a preset position, and the opening angle of the refrigerator door is a critical angle, before the refrigerator door is closed to the preset position (the opening angle of the refrigerator door is greater than the critical angle), the damping buffer structure is located at the end of the guide groove away from the fixed seat. The damping buffer structure slides along the guide groove, and at this time, the damping buffer structure has basically no effect. When the refrigerator door is closed to the preset position (the opening angle of the refrigerator door is equal to the critical angle), the damping buffer structure moves to the end of the guide groove near the fixed seat and abuts against the end wall of the guide groove. When the refrigerator door is closed further, the two ends of the damping buffer structure are compressed by the squeezing force, thereby providing a reverse pushing force for the closing of the refrigerator door, that is, buffering the closing of the refrigerator door, reducing the closing noise of the refrigerator door, and reducing the risk of collision and falling out of the bottle frame in the refrigerator door. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1 A schematic diagram of the hinge structure in an embodiment of the refrigerator provided by this utility model;
[0028] Figure 2 for Figure 1A schematic diagram of the hinge structure when the refrigerator door is fully closed;
[0029] Figure 3 for Figure 2 Cross-sectional view of the central hinge structure;
[0030] Figure 4 for Figure 1 A schematic diagram of the hinge structure before the refrigerator door is closed to the preset position;
[0031] Figure 5 for Figure 4 Cross-sectional view of the central hinge structure;
[0032] Figure 6 for Figure 1 A schematic diagram of the hinge structure when the refrigerator door is closed to the preset position;
[0033] Figure 7 for Figure 6 Cross-sectional view of the central hinge structure;
[0034] Figure 8 for Figure 1 A schematic diagram of the mounting components in the hinge structure;
[0035] Figure 9 A schematic diagram of the hinge structure in another embodiment of the refrigerator provided by this utility model;
[0036] Figure 10 for Figure 9 A cross-sectional view of the hinge structure.
[0037] Explanation of icon numbers:
[0038] 1. Hinge structure; 11. Fixed base; 12. Mounting base; 13. Linkage assembly; 14. First swing arm structure; 141. First main swing arm; 142. First auxiliary swing arm; 143. Guide groove; 144. Mounting component; 1441. Snap-fit notch; 1442. Limiting step; 15. Second swing arm structure; 151. Second main swing arm; 152. Second auxiliary swing arm; 16. Damping buffer structure; 161. Damping body; 162. Push rod; 163. Elastic reset component; 164. Spring; 165. Torsion spring; 17. Elastic assist structure; 18. Rotating shaft.
[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0041] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0043] This utility model proposes a hinge structure 1 for use in household appliances such as refrigerators.
[0044] Please see Figures 1 to 10 In one embodiment of this utility model, the hinge structure 1 includes:
[0045] Mounting bracket 11 is used for mounting on the refrigerator body;
[0046] Mounting bracket 12 is used for installation on the refrigerator door;
[0047] The linkage assembly 13 includes a first swing arm structure 14 and a second swing arm structure 15 rotatably connected. The end of the first swing arm structure 14 away from the second swing arm structure 15 is rotatably connected to a fixed base 11. The end of the second swing arm structure 15 away from the first swing arm structure 14 is rotatably connected to the fixed base 11. A guide groove 143 is provided at the end of the first swing arm structure 14 near the fixed base 11, and the guide groove 143 extends towards the second swing arm structure 15.
[0048] The damping buffer structure 16 is movably mounted on the guide groove 143 at one end and rotatably connected to the second swing rod structure 15 at the other end.
[0049] Before the refrigerator door is closed to the preset position, the damping buffer structure 16 slides along the guide groove 143. When the refrigerator door is closed to the preset position, the damping buffer structure 16 is compressed to provide a buffer for the closing of the refrigerator door.
[0050] Specifically, the fixed base 11 is installed on the refrigerator body, the mounting base 12 is installed on the refrigerator door, and one end of the connecting rod assembly 13 is driven to the fixed base 11 and the other end is driven to the mounting base 12, thereby realizing the installation of the refrigerator door and the refrigerator body and enabling the refrigerator door to open and close. The connecting rod assembly 13 includes a first swing arm structure 14 and a second swing arm structure 15. One end of the first swing arm structure 14 is driven to the fixed base 11, and the other end is driven to the second swing arm structure 15. The end of the second swing arm structure 15 away from the first swing arm structure 14 is driven to the mounting base 12.
[0051] In existing technology, the hinge structure 1 usually also includes an elastic assist structure 17. When the refrigerator door is closed to a preset position, the elastic assist structure 17 can release a certain amount of elastic potential energy, thereby assisting the hinge structure 1 in pulling the refrigerator door to close, thus providing a driving force for the refrigerator door to close completely and achieving automatic closing of the refrigerator door. However, as the elastic potential energy of the elastic assist structure 17 is released, the closer the refrigerator door is to the refrigerator body, the greater its movement speed, and the greater the impact force of the refrigerator door on the refrigerator body; or when the user closes the door with greater force, it will also cause the refrigerator door to have an excessive impact force on the refrigerator body, resulting in loud closing noise and potentially causing items inside the refrigerator door's bottle frame to collide or fall out.
[0052] Therefore, the first swing arm structure 14 has a guide groove 143 extending towards the second swing arm structure 15 at one end near the fixed base 11. One end of the damping buffer structure 16 is movably installed in the guide groove 143, and the other end is rotatably connected to the second swing arm structure 15. Assuming that when the refrigerator door is closed to a preset position, the opening angle of the refrigerator door is a critical angle, and before the refrigerator door is closed to the preset position (the opening angle of the refrigerator door is greater than the critical angle, see...),... Figure 4 and Figure 5 At this time, the damping buffer structure 16 is located at the end of the guide groove 143 away from the fixed seat 11, and the damping buffer structure 16 slides along the guide groove 143. At this time, the damping buffer structure 16 basically does not work; when the refrigerator door is closed to the preset position (the opening angle of the refrigerator door is equal to the critical angle, see Figure 6 and Figure 7When the damping structure moves to one end of the guide groove 143 near the fixed seat 11 and abuts against the end wall of the guide groove 143, the two ends of the damping buffer structure 16 are compressed by the squeezing force when the refrigerator door is further closed, thus providing a reverse pushing force for closing the refrigerator door, which is to buffer the closing of the refrigerator door, reduce the closing noise of the refrigerator door, and reduce the risk of collision and falling out of the bottle frame in the refrigerator door. Moreover, due to the presence of the elastic assist structure 17 and the damping structure, the refrigerator door can be closed to the preset position with a relatively smooth pushing force, thereby reducing the impact of the refrigerator door on the refrigerator body and ensuring that the refrigerator door is closed in place.
[0053] Understandably, when the refrigerator door first begins to close (refer to...), Figure 4 and Figure 5 The closing of the refrigerator door is primarily achieved through the rotation of the first swing arm structure 14 towards the fixed base 11. Specifically, in the initial stage of closing the refrigerator door, the rotation amplitude of the first swing arm structure 14 relative to the fixed base 11 is greater than the rotation amplitude of the second swing arm structure 15 relative to the first swing arm structure 14. Once the door is closed to the preset position, further closing is achieved mainly through the rotation of the second swing arm structure 15 relative to the first swing arm structure 14. In other words, after the refrigerator door is closed to the preset position, the rotation amplitude of the first swing arm structure 14 relative to the fixed base 11 is less than the rotation amplitude of the second swing arm structure 15 relative to the first swing arm structure 14. Therefore, one end of the damping buffer structure 16 is movably mounted on the guide groove 143, and the other end is rotatably connected to the second swing arm structure 15. This means that the damping buffer structure 16 effectively prevents the refrigerator door from closing by blocking the continued rotation of the second swing arm structure 15, thus ensuring the effectiveness of the damping buffer structure 16. In the initial stage of closing the refrigerator door, since the rotation amplitude of the second swing arm structure 15 relative to the first swing arm structure 14 is relatively small, its motion margin can be absorbed by the guide groove 143. Further optionally, the elastic assist structure 17 acts on the second swing arm structure 15, thereby further improving the effectiveness of the elastic assist structure 17 in driving the refrigerator door to close.
[0054] It should be noted that this critical angle is a virtual angle limit for ease of explanation, but in the actual operation of the linkage assembly 13, there is no clear boundary. For example, before the refrigerator door is closed to the preset position, the damping buffer structure 16 may also be compressed to a certain extent, but the amount of compression is very small and can be ignored. When the refrigerator door is closed to the preset position, the damping buffer structure 16 may not have fully moved to the end of the guide groove 143 near the fixed seat 11, and there may be a certain gap between it and the end wall of the guide groove 143, but this gap can also be ignored. That is, before the refrigerator door is closed to the preset position, the damping buffer structure 16 mainly slides in the guide groove 143 to cooperate with the movement of the second swing arm structure 15; after the refrigerator door is closed to the preset position, the damping buffer structure 16 mainly compresses to provide a certain damping force for the movement of the second swing arm structure 15.
[0055] The critical angle is greater than or equal to 20° and less than or equal to 30°. Specifically, the critical angle can be 20°, 22°, 24°, 26°, 28°, 30°, etc. To ensure the smooth sliding of the damping buffer structure 16 in the guide groove 143 before the refrigerator door is closed to the preset position, the guide groove 143 can be an arc-shaped groove. For example, the first swing arm structure 14 is rotatably connected to the fixed base 11 via a rotating shaft 18, and the guide groove 143 is configured as an arc-shaped groove concave relative to the rotating shaft 18. In other embodiments, the guide groove 143 can also be an arc-shaped groove protruding towards the rotating shaft 18. Of course, in other embodiments, the guide groove 143 can also be a straight groove.
[0056] To facilitate the installation of the damping buffer structure 16, one end of the damping buffer structure 16 is provided with a protruding shaft protruding from a guide groove 143. The protruding shaft is inserted into the damping buffer structure 16, thereby allowing the damping buffer structure 16 to be movably installed in the guide groove 143. The other end of the damping buffer structure 16 can also be rotatably connected to the second rocker arm structure 15 via a rotating shaft 18.
[0057] See Figure 3 , Figure 5 , Figure 7 and Figure 8In an embodiment of this utility model, the first swing arm structure 14 includes a first main swing arm 141 and a mounting member 144 fixed to one end of the first main swing arm 141 near the fixed base 11. A guide groove 143 is provided on the mounting member 144, and the first main swing arm 141 is rotatably mounted on the fixed base 11. Since the first main swing arm 141 is typically formed into an approximately "U"-shaped structure through a stamping process, and the damping buffer structure 16 is located at least at one end near the fixed base 11 within the first main swing arm 141, if the mounting part 144 could be integrally formed onto the first main swing arm 141, it would undoubtedly increase the processing difficulty of the first main swing arm 141 and make subsequent processing of the guide groove 143 inconvenient. Therefore, the mounting part 144 and the first main swing arm 141 are formed separately, and the guide groove 143 is pre-formed on the mounting part 144. Then, the mounting part 144 is correspondingly fixed to the first main swing arm 141, which facilitates the formation of the guide groove 143, the processing of the first swing arm structure 14, and the synchronous rotation of the mounting part 144 driven by the first main swing arm 141. Of course, in other embodiments, the mounting part 144 can also be integrally formed onto the first main swing arm 141, thereby improving the connection stability between the mounting part 144 and the first main swing arm 141. The mounting component 144 can be snapped onto the first main swing arm 141, or it can be welded or fastened to the first main swing arm 141 by fasteners such as screws or rivets.
[0058] Optionally, the first main swing arm 141 is rotatably connected to the fixed base 11 via a pivot 18. One side of the mounting member 144 is provided with a snap-fit notch 1441, which is rotatably snapped into the pivot 18. The other side of the mounting member 144 is snapped into the first main swing arm 141. Specifically, during actual installation, the pivot 18 can first pass through the first main swing arm 141, and then, through the snap-fit notch 1441, further snap one side of the mounting member 144 into the pivot 18, thus completing the snap-fit between the other side of the mounting member 144 and the first main swing arm 141; alternatively, one side of the mounting member 144 can first be snapped into the pivot 18 through the snap-fit notch 1441, and then the pivot 18 can pass through the first main swing arm 141, finally completing the snap-fit between the other side of the mounting member 144 and the first main swing arm 141. Compared to providing a locking hole on one side of the mounting component 144 for the rotating shaft 18 to pass through, this solution offers a more flexible installation method, thus facilitating the installation of the first rocker arm structure 14. Preferably, the guide groove 143 is spaced apart from the rotating shaft 18, and the guide groove 143 is located at the end of the mounting component 144 facing the first rocker arm structure 14.
[0059] To further facilitate the engagement of the mounting component 144 with the first main swing arm 141, in one embodiment, a protrusion is provided on the other side of the mounting component 144 near the edge of the fixed base 11. This protrusion and other positions of the mounting component 144 form a limiting step 1442. The end of the first main swing arm 141 near the fixed base 11 is provided with a limiting notch. The limiting step 1442 engages with the edge of the limiting notch, so that one side of the mounting component 144 abuts against the rotating shaft 18, and the other side can abut against the first main swing arm 141. In actual installation, simply engage one side of the mounting component 144 with the rotating shaft 18 through the engaging notch 1441, and then rotate it towards the first main swing arm 141 so that the limiting step 1442 engages with the limiting notch. This ensures both the stable engagement of the mounting component 144 with the first main swing arm 141 and facilitates the installation of the mounting component 144.
[0060] See Figures 1 to 10 The second swing arm structure 15 includes a second main swing arm 151 and a second auxiliary swing arm 152. One end of the second main swing arm 151 is connected to the mounting base 12, and the other end is connected to the first swing arm structure 14. One end of the second auxiliary swing arm 152 is connected to the mounting base 12, and the other end is connected to the first swing arm structure 14. The second auxiliary swing arm 152 is located on the side of the second main swing arm 151 near the fixed base 11. The damping buffer structure 16 is rotatably connected to the second auxiliary swing arm 152 at the end away from the fixed base 11.
[0061] Specifically, one end of the second auxiliary swing arm 152 of the second main swing arm 151 is connected to the mounting base 12, and the other end is connected to the first swing arm structure 14. Therefore, the second main swing arm 151 and the second auxiliary swing arm 152 are spaced apart between the mounting base 12 and the first swing arm structure 14. However, during the movement of the connecting rod assembly 13, the rotation angles of the second main swing arm 151 and the second auxiliary swing arm 152 relative to the first swing arm structure 14 can be the same or different. The second auxiliary swing arm 152 is located on the side of the second main swing arm 151 closer to the fixed base 11, that is, the second auxiliary swing arm 152 is closer to the guide groove 143, thereby realizing the proximity connection between the damping buffer structure 16 and the second swing arm structure 15, and also facilitating the connection between the damping buffer structure 16 and the second swing arm structure 15. In other embodiments, the end of the damping buffer structure 16 away from the fixed base 11 can also be connected to the second main swing arm 151.
[0062] Preferably, one end of the elastic assist structure 17 is connected to the mounting base 12 and is located on the side of the second main swing arm 151 facing the second auxiliary swing arm 152, while the other end is connected to the second main swing arm 151 and the first swing arm structure 14. Thus, when the refrigerator door is closed to the preset position, the elastic assist structure 17 retracts and resets to release elastic potential energy, thereby providing driving force for the movement of the second main swing arm 151, and also for the movement of the second swing arm structure 15, to provide driving force for closing the refrigerator door and ensuring the refrigerator door is closed completely. In another embodiment, one end of the elastic assist structure 17 is connected to the mounting base 12 and is located on the side of the second main swing arm 151 away from the second auxiliary swing arm 152, while the other end is connected to the second main swing arm 151 and the first swing arm structure 14. Thus, when the refrigerator door is closed to the preset position, the elastic assist structure 17 extends and resets to release elastic potential energy, thereby providing driving force for the movement of the second main swing arm 151. Furthermore, the elastic assist structure 17 acts on the second main swing arm 151, and the buffer damping structure acts on the second auxiliary swing arm 152. That is, the elastic assist structure 17 and the buffer damping structure act on two different swing arms. Compared to a scheme where the elastic assist structure 17 and the buffer damping structure act on the second auxiliary swing arm 152 simultaneously, this reduces the possibility of the second auxiliary swing arm 152 getting stuck, thereby ensuring the motion stability of the linkage assembly 13. In other embodiments, one end of the elastic assist structure 17 is connected to the mounting base 12, and the other end is connected to the second auxiliary swing arm 152 and the first swing arm structure 14.
[0063] Furthermore, the first pendulum structure 14 includes a first main pendulum 141 and a first auxiliary pendulum 142. One end of the first main pendulum 141 is connected to the fixed base 11, and the other end is connected to the second main pendulum 151 and the second auxiliary pendulum 152. One end of the first auxiliary pendulum 142 is connected to the fixed base 11, and the other end is connected to the second auxiliary pendulum 152. A guide groove 143 is provided on the first main pendulum 141.
[0064] Specifically, the first main swing arm 141 and the second main swing arm 151 serve as the main structure of the linkage assembly 13. Therefore, one end of the first main swing arm 141 is rotatably connected to the fixed base 11, and the other end is rotatably connected to the second main swing arm 151. The end of the second main swing arm 151 away from the first main swing arm 141 is rotatably connected to the mounting base 12. At the same time, the first auxiliary swing arm 142 and the second auxiliary swing arm 152 are provided as auxiliary structures to limit the relative swing of the first main swing arm 141 and the second main swing arm 151 and to assist the movement of the first main swing arm 141 and the second main swing arm 151. Therefore, one end of the second auxiliary swing arm 152 is rotatably connected to the mounting base 12, and the other end is rotatably connected to the first swing arm structure 14. The second auxiliary swing arm 152 is located on the side of the second main swing arm 151 near the fixed base 11. One end of the first auxiliary swing arm 142 is rotatably connected to the fixed base 11, and the other end is rotatably connected to the second auxiliary swing arm 152. Thus, the first main swing arm 141, the first auxiliary swing arm 142, the second main swing arm 151, and the second auxiliary swing arm 152 work together to control the rotation angle of the refrigerator door. This multi-link hinge mechanism can effectively improve the rotational smoothness of the refrigerator door and also increase the opening angle of the refrigerator door, making its opening angle greater than 90° (usually 110° to 115°).
[0065] In one embodiment, the damping structure is located on the side of the first secondary pendulum 142 facing the first main pendulum 141. Since the end of the damping buffer structure 16 near the fixed base 11 is necessarily located on the side of the first secondary pendulum 142 facing the first main pendulum 141, the damping structure is located on the side of the first secondary pendulum 142 facing the first main pendulum 141. That is, the end of the damping buffer structure 16 away from the mounting base 12 is connected to the side of the first secondary pendulum 142 facing the first main pendulum 141, thereby reducing the possibility of interference between the first secondary pendulum 142 and the damping buffer structure 16.
[0066] See again Figures 1 to 10 In an embodiment of this utility model, the damping buffer structure 16 includes a damping body 161, a push rod 162 slidably inserted into the damping body 161, and an elastic reset member 163. The end of the damping body 161 away from the push rod 162 is movably installed in the guide groove 143, and the end of the push rod 162 away from the damping body 161 is rotatably installed in the second swing rod structure 15. The elastic reset member 163 enables the push rod 162 and the damping body 161 to tend to move away from each other.
[0067] Specifically, the damper includes a damping body 161 and a push rod 162, with the push rod 162 slidably inserted into the damping body 161. The two ends of the damper are respectively connected to the guide groove 143 and the second swing arm structure 15. The damper itself has a certain damping force. Therefore, before the refrigerator door is closed to the preset position, the movement amplitude of the second swing arm 152 is relatively small. Due to the damping force of the damper, the damper slides relative to the guide groove 143 first. The damper itself does not deform much, or the deformation is very small and negligible. After the refrigerator door is closed to the preset position, the movement amplitude of the second swing arm 152 increases relatively, and the damper is compressed, thereby releasing the damping force and providing a buffer for the closing of the refrigerator door. The damper is often configured as a small hydraulic damper, and after being compressed, it often cannot automatically rebound. Therefore, an elastic reset member 163 is provided. The elastic reset member 163 makes the push rod 162 and the damping body 161 tend to move away from each other, which can assist the damper in elongating and resetting.
[0068] In one embodiment, reference is made to Figures 1 to 7 The elastic reset element 163 is configured as a spring 164, which is sleeved on the push rod 162. One end of the spring 164 is connected to the damping body 161, and the other end is connected to the end of the push rod 162 near the second swing arm structure 15. Specifically, one end of the spring 164 abuts against the damping body 161, and the other end is connected to the end of the push rod 162 away from the damping body 161. When the refrigerator door is closed to the preset position, the damper is compressed, and the spring 164 is also compressed. When the refrigerator door is opened again, the second swing arm structure 15 swings away from the fixed seat 11, and the spring 164 releases its elastic potential energy to assist the damper in resetting.
[0069] In another embodiment, reference Figure 8 and Figure 9 The elastic reset element 163 is configured as a torsion spring 165. The first swing arm structure 14 is rotatably connected to the fixed base 11 via a rotating shaft 18. The torsion spring 165 is sleeved on the rotating shaft 18. One side of the torsion spring 165 is connected to the first swing arm structure 14, and the other side is connected to the end of the damping body 161 facing the fixed base 11. Specifically, the torsion spring 165 can pull the damping body 161 to move away from the fixed base 11. Before the refrigerator door is closed to the preset position, under the tension of the torsion spring 165 and the damping of the damper itself, the damper first slides relative to the guide groove 143, and the damper itself does not deform much. After the refrigerator door is closed to the preset position, the damper is compressed and thus releases the damping force, thereby providing a buffer for the closing of the refrigerator door. When the refrigerator door is opened again, the second swing arm structure 15 swings away from the fixed base 11, and at the same time, under the tension of the torsion spring 165, the damper resets.
[0070] This utility model also proposes a refrigerator, which includes a hinge structure 1. The specific structure of the hinge structure 1 is as described in the above embodiments. Since this refrigerator adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0071] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.
Claims
1. A hinge structure, characterized by, The application relates to a refrigerator door closing device. The device comprises: a fixed seat for being mounted on a refrigerator body; a mounting seat for being mounted on a refrigerator door body; a connecting rod assembly comprising a first swing rod structure and a second swing rod structure which are rotatably connected, one end of the first swing rod structure rotatably connected to the fixed seat, one end of the second swing rod structure rotatably connected to the fixed seat, one end of the first swing rod structure close to the fixed seat provided with a guide sliding groove which extends towards the second swing rod structure; and a damping buffer structure movably mounted on the guide sliding groove at one end and rotatably connected to the second swing rod structure at the other end; 2. The hinge structure of claim 1, wherein before the refrigerator door body is closed to a preset position, the damping buffer structure slides along the guide sliding groove, and after the refrigerator door body is closed to the preset position, the damping buffer structure is compressed to provide a buffer for the closing of the refrigerator door body.
3. The hinge structure of claim 2, wherein The first swing rod structure comprises a first main swing rod and a mounting member fixed to one end of the first main swing rod close to the fixed seat, the guide sliding groove is arranged on the mounting member, and the first main swing rod is rotatably mounted on the fixed seat.
4. The hinge structure of claim 1, wherein The first main swing rod is rotatably connected to the fixed seat through a rotating shaft, one side of the mounting member is provided with a clamping notch, the clamping notch is rotatably clamped on the rotating shaft, and the other side of the mounting member is clamped on the first main swing rod. The second swing rod structure comprises a second main swing rod and a second auxiliary swing rod, one end of the second main swing rod is connected to the mounting seat, the other end is connected to the first swing rod structure, one end of the second auxiliary swing rod is connected to the mounting seat, the other end is connected to the first swing rod structure, and the second auxiliary swing rod is arranged on one side of the second main swing rod close to the fixed seat; 5. The hinge structure of claim 4, wherein one end of the damping buffer structure rotatably connected to the second auxiliary swing rod. The first swing rod structure comprises a first main swing rod and a first auxiliary swing rod, one end of the first main swing rod is connected to the fixed seat, the other end is connected to the second main swing rod and the second auxiliary swing rod, one end of the first auxiliary swing rod is connected to the fixed seat, and the other end is connected to the second auxiliary swing rod; 6. The hinge structure of claim 5, wherein the guide sliding groove is arranged on the first main swing rod.
7. The hinge structure of claim 1, wherein The damping buffer structure is arranged on one side of the first auxiliary swing rod towards the first main swing rod. The damping buffer structure comprises a damping body, a push rod slidably inserted into the damping body, and an elastic reset member, one end of the damping body movably mounted on the guide sliding groove, one end of the push rod rotatably mounted on the second swing rod structure away from the damping body; 8. The hinge structure of claim 7, wherein the elastic reset member makes the push rod and the damping body have a tendency to move away from each other.
9. The hinge structure of claim 7, wherein The elastic reset member is configured as a spring, the spring is sleeved on the push rod, one end of the spring is connected to the damping body, and the other end is connected to one end of the push rod close to the second swing rod structure. The elastic reset member is configured as a torsion spring, the first swing rod structure is rotatably connected to the fixed seat through a rotating shaft, the torsion spring is sleeved on the rotating shaft, one side of the torsion spring is connected to the first swing rod structure, and the other side is connected to one end of the damping body towards the fixed seat.
10. The hinge structure according to any one of claims 1 to 9, wherein The first swing rod structure is rotatably connected to the fixed seat through a rotating shaft, and the guide sliding groove is configured as an arc-shaped groove recessed relative to the rotating shaft; or The guide sliding groove is configured as a straight groove.
11. The hinge structure according to any one of claims 1 to 9, wherein At the preset position, the opening angle of the refrigerator door body is greater than or equal to 20° and less than or equal to 30°.
12. A refrigerator characterized by comprising: A hinge structure as claimed in any one of claims 1 to 11. A hinge structure as claimed in any one of claims 1 to 11.