Multi-link hinge

Abstract

An embodiment of the present invention provides a multi-link hinge having a base rod, a top rod, and a plurality of links connecting the base rod and the top rod, comprising: a protective plate rotatably coupled to one of the base rod and the top rod via a first axis, and covering at least a portion of the space between the plurality of links, the plurality of links being in opposite positions to each other as the multi-link hinge is opened or closed; and a connecting member having a first end and a second end, the first end being rotatably coupled to the protective plate via a second axis, and the second end being rotatably coupled to one of the plurality of links via a third axis, thereby connecting the protective plate to one of the plurality of links.

Description

Technical Field

[0001] This invention relates to a multi-link hinge. Background Technology

[0002] Typically, kitchen furniture, including electronic products, uses doors that open and close by rotating around a hinge axis. However, due to socio-economic development and improved cultural levels, there is a growing trend towards using doors that enhance convenience, aesthetics, and reliability.

[0003] In particular, multi-link hinges used in built-in drawer cabinets and home appliances open smoothly while allowing for maximum rotation without affecting adjacent products, making them convenient to use. Furthermore, multi-link hinges offer the advantages of a better fit when closing and an aesthetically pleasing appearance, thus their use is steadily increasing.

[0004] In other words, multi-link hinges, as products that combine sheet metal components composed of multiple joints, are suitable for doors of home appliances and other products to maximize the space utilization of the door and improve the aesthetic experience of home appliances.

[0005] However, this type of multi-link hinge has relatively long links to allow for extension as needed. Because of this inherent limitation, gaps of varying sizes are created between the links depending on the hinge's open position; these gaps can widen or narrow when the door is operated. In this situation, if a user's fingers are inserted into these gaps, there is a risk of injury.

[0006] Existing technical documents Korean Patent Publication No. 10-1490160 (January 30, 2015) Summary of the Invention (The problem to be solved) The present invention is intended to solve the problems of the prior art described above. The purpose of the present invention is to provide a multi-link hinge, including a protective plate and an adjustment unit. The protective plate covers the space between multiple links and internal components. The adjustment unit adjusts the elastic support of the elastic component, thereby improving the stability and operability for the user.

[0007] (Solutions) To achieve the objectives described above, one aspect of the present invention provides a multi-link hinge having a base rod, a top rod, and a plurality of links connecting the base rod and the top rod, comprising: a protective plate rotatably coupled to one of the base rod and the top rod via a first axis, and covering at least a portion of the space between the plurality of links, the plurality of links being in opposite positions to each other as the multi-link hinge is opened or closed; and a connecting member having a first end and a second end, the first end being rotatably coupled to the protective plate via a second axis, and the second end being rotatably coupled to one of the plurality of links via a third axis, thereby connecting the protective plate to one of the plurality of links.

[0008] In one embodiment of the present invention, it may be a multi-link hinge, characterized in that the connecting component is located between the plurality of links and the protective plate to avoid being exposed to the outside.

[0009] In one embodiment of the present invention, it may be a multi-link hinge, characterized in that the first axis, the second axis and the third axis are parallel to each other.

[0010] In one embodiment of the present invention, it may be a multi-link hinge, characterized in that the distance between the first axis and the second axis and the distance between the first axis and the third axis are greater than the distance between the second axis and the third axis.

[0011] In one embodiment of the present invention, the multi-link hinge may be as follows, characterized in that the connecting component rotates within a preset rotation radius with respect to the second axis during the process of the multi-link hinge moving from the open position to the closed position or from the closed position to the open position.

[0012] In one embodiment of the present invention, it may be a multi-link hinge as follows, characterized in that the connecting member includes a protrusion protruding into the inner side of the protective plate; the protective plate includes a first stop and a second stop, the first stop and the second stop being formed on the inner side at one end and the other end of the preset rotation radius range, respectively, to prevent the connecting member from deviating from the preset rotation radius range when the connecting member rotates about the second axis.

[0013] In one embodiment of the present invention, the multi-link hinge may be as follows, characterized in that it further comprises: an elastic member that provides elastic force during the opening or closing of the multi-link hinge; a roller unit that is elastically supported by the elastic member and is linearly movable relative to the elastic member, and has a roller at one end; and a cam unit that presses the roller under the action of the elastic member during the opening or closing of the multi-link hinge.

[0014] In one embodiment of the present invention, it may be a multi-link hinge, characterized in that it further includes an adjustment unit, the adjustment unit having an adjustment screw and being coupled to the cam unit shaft; as the adjustment screw is tightened or loosened, the adjustment unit interacts with the cam unit to move the cam unit closer to or further away from the roller.

[0015] In one embodiment of the present invention, it may be a multi-link hinge, characterized in that the adjusting unit is located on a link different from the link on which the roller unit is located.

[0016] One aspect of the present invention provides a multi-link hinge having a base rod, a top rod, and a plurality of links connecting the base rod and the top rod, comprising: a protective plate rotatably coupled to one of the base rod and the top rod via a first axis, and covering at least a portion of the space between the plurality of links, the plurality of links being in opposite positions to each other as the multi-link hinge is opened or closed; a connecting member having a first end and a second end, the first end being rotatably coupled to the protective plate via a second axis, and the second end being rotatably coupled to one of the plurality of links via a third axis, thereby connecting the protective plate to one of the plurality of links; and an elastic surface layer formed on at least one side of the protective plate for reducing the operating noise of the multi-link hinge.

[0017] (The effect of the invention) According to one aspect of the invention, a multi-link hinge can be provided, which, due to having a protective plate covering the space between multiple links and internal components, provides improved consumer stability and ease of assembly.

[0018] In addition, the degree to which the multi-link hinge is elastically supported by the spring unit when it is opening or closing can be adjusted by using the adjusting screw of the adjusting unit.

[0019] The effects of the present invention are not limited to those described above, but should be understood to include all effects that can be inferred from the detailed description of the invention or the structure of the invention as set forth in the claims. Attached Figure Description

[0020] Figure 1 This is a diagram illustrating a multi-link hinge in its closed state according to an embodiment of the present invention.

[0021] Figure 2 This is a diagram showing the position and connection relationship of the protective plate and connecting components in the closed state according to an embodiment of the present invention.

[0022] Figure 3This is a cross-sectional view of a multi-link hinge in its closed state according to an embodiment of the present invention.

[0023] Figure 4 This is a diagram illustrating a multi-link hinge in an open state according to an embodiment of the present invention.

[0024] Figure 5 This is a diagram showing the position and connection relationship of the protective plate and connecting components in the open state according to an embodiment of the present invention.

[0025] Figure 6 This is a cross-sectional view of a multi-link hinge in an open state according to an embodiment of the present invention.

[0026] Figure 7 Figures (a) and (b) are respectively showing the adjusting screw loosened state and the adjusting screw tightened state of the adjusting unit according to an embodiment of the present invention.

[0027] Figure 8 This is a perspective view of a multi-link hinge in a separated state, showing the protective plate and connecting components according to an embodiment of the present invention.

[0028] Figure 9 Figures (a) and (b) are respectively showing the inner side of a protective plate without an elastic surface layer and the inner side of a protective plate with an elastic surface layer according to an embodiment of the present invention.

[0029] Figure 10 yes Figure 9 A partially enlarged view.

[0030] Figure 11 (a) and (b) are perspective and side views of a connecting member according to an embodiment of the present invention.

[0031] Figure 12 Figures (a) and (b) are diagrams illustrating the operation of the connecting member in a closed state and an open state according to an embodiment of the present invention. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various different forms and is not limited to the embodiments described herein. Furthermore, for the purpose of clearly illustrating the present invention, parts unrelated to the description are omitted from the drawings, and similar reference numerals are used for the same or similar parts throughout the specification.

[0033] Throughout the specification, when a part is "connected" to another part, this includes not only "direct connection" but also "indirect connection" where other components are in between. Furthermore, when a part "includes" a component, this means that, unless specifically opposed, other components are not excluded, but rather that other components may also be present.

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] Figure 1 This is a diagram illustrating a multi-link hinge in a closed state according to an embodiment of the present invention; Figure 2 This is a diagram showing the position and connection relationship of the protective plate and connecting components in the closed state according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a multi-link hinge in the closed state according to an embodiment of the present invention; Figure 4 This is a diagram illustrating a multi-link hinge in an open state according to an embodiment of the present invention; Figure 5 This is a diagram showing the position and connection relationship of the protective plate and connecting components in the open state according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of a multi-link hinge in an open state according to an embodiment of the present invention; Figure 7 Figures (a) and (b) are respectively showing the adjusting screw loosened state and the adjusting screw tightened state of the adjusting unit according to an embodiment of the present invention.

[0036] Reference Figures 1 to 7 The multi-link hinge 1000 of the present invention includes: a bottom rod 100, a top rod 200, a first link 300, a second link 400, a third link 500, and a fourth link 600.

[0037] That is, the multi-link hinge 1000 is composed of multiple links 300, 400, 500, and 600 connecting the bottom rod 100 and the top rod 200. This multi-link hinge 1000 can be applied to products such as built-in home appliances and furniture equipped with doors.

[0038] The bottom rod 100, top rod 200, and multiple connecting rods 300, 400, 500, and 600 are rotatably connected to each other so that the door of the product can be easily moved from the open position to the closed position or from the closed position to the open position even in narrow spaces.

[0039] The base rod 100 can be installed on the main body of the product with a door, and has a first joint portion 10 and a second joint portion 11 that are spaced apart from each other.

[0040] The top rod 200 can be installed in front of the door of the switch body, and has a third joint portion 12 and a fourth joint portion 13 formed at intervals.

[0041] The first link 300 is pivotally connected to the first joint portion 10 at one end and has a fifth joint portion 14 formed at the other end and a sixth joint portion 15 formed on the inner side.

[0042] The second link 400 is pivotally connected to the third joint 12 and the fifth joint 15, and has a seventh joint 16 on the inner side.

[0043] The third link 500 is pivotally connected to the fourth joint 13 and the fifth joint 14.

[0044] The fourth link 600 is pivotally connected to the second joint 11 and the seventh joint 16.

[0045] According to one embodiment, the multi-link hinge 1000 may further include: an elastic member 20, a roller unit 30, and a cam unit 40.

[0046] More specifically, the multi-link hinge 1000 may further include: an elastic member 20 that provides elastic force during the opening or closing of the multi-link hinge; a roller unit 30 that is elastically supported by the elastic member 20 and linearly movable relative to the elastic member 20, and has a roller 31 at one end; and a cam unit 40 that presses the roller 31 under the action of the elastic member 20 during the opening or closing of the multi-link hinge 1000.

[0047] The elastic member 20 is disposed in one of the multiple links to provide elastic force during the operation of the multi-link hinge 1000, so that the multi-link hinge 1000 is pushed to the closed position or the open position.

[0048] The elastic member 20 is configured such that one end is supported by the third link 500 and the other end is supported by the roller unit 30.

[0049] More specifically, the elastic member 20 can be configured such that it is wound around the outer periphery of the extension 30a of the roller unit 30, with one end supported by the third link 500 and the other end supported by the head 30b of the roller unit 30. This elastic member 20 can be in the form of a coil spring, and can be a compression spring or a tension spring.

[0050] The roller unit 30 comprises an extension 30a and a head 30b. The extension 30a is connected to one of a plurality of links, preferably the third link 500. The head 30b may have a roller 31 that interacts with the cam unit 40.

[0051] The roller unit 30 is configured to allow linear movement relative to the elastic member 20 when its head 30b is elastically supported by the elastic member 20. In this configuration, a first guide hole 32 in the shape of an elongated hole is formed in the head 30b of the roller unit 30. A first guide protrusion 33 is inserted into the first guide hole 32, and this first guide protrusion 33 is fixed to one of a plurality of links, preferably the third link 500. This first guide hole 32 and the first guide protrusion 300 guide the linear movement of the roller unit 30 during the opening or closing of the multi-link hinge 1000.

[0052] The cam unit 40 is a roller 31 that can be pressed by the elastic member 20 during the opening or closing of the multi-link hinge 1000, preferably the fifth joint 14, and is connected to the first link 300 via one of a plurality of links.

[0053] That is, during the opening or closing of the multi-link hinge 1000, the roller contact surface 41 of the cam unit 40 contacts the roller 31 of the roller unit 30 to press the roller unit 30, thereby compressing or stretching the elastic member 20.

[0054] In other words, the roller unit 30 is elastically supported by the elastic member 20 while interacting with the cam unit 40, and the roller 31 rotates along the outer peripheral surface of the cam unit 40.

[0055] According to one embodiment, the multi-link hinge 1000 may further include an adjustment unit 50.

[0056] The adjusting unit 50 can be disposed on one of a plurality of links, preferably the first link 300, and can be connected to the cam unit 40 via a connecting shaft 51. That is, the adjusting unit 50 is disposed on a link different from the link on which the roller unit 30 is mounted. A portion of the outer periphery of the adjusting unit 50 can be formed with a convex surface 52, which corresponds to the shape of the concave surface 44 of the cam unit 40.

[0057] The adjustment unit 50 includes an adjustment screw 53, a portion of which is exposed outside the first connecting rod 300 for user adjustment. Specifically, tightening or loosening the adjustment screw 53 causes the adjustment unit 50, which is threaded to the adjustment screw 53, to move towards the side closer to the adjustment screw 53 or away from it.

[0058] According to one embodiment, if the adjusting screw 53 is tightened, the adjusting unit 50 interacts with the cam unit 40, moving the cam unit 40 closer to the roller unit 30; if the adjusting screw 53 is loosened, the adjusting unit 50 interacts with the cam unit 40, moving the cam unit 40 away from the roller unit 30.

[0059] At this time, the adjusting unit 50 and the cam unit 40 are connected by the connecting shaft 51, and the convex surface 52 of the adjusting unit 50 and the concave surface 44 of the cam unit 40 are rotatably in contact with each other in corresponding shapes. That is, if the adjusting screw 53 is tightened, the adjusting unit 50 moves toward the cam unit 40, while the cam unit 40 rotates about the connecting shaft 51 along the convex surface 52 and moves to approach the roller 31 (to... Figure 7 (The direction is clockwise). Additionally, if the adjusting screw 53 is loosened, the adjusting unit 50 moves away from the cam unit 40, while the cam unit 40 rotates around the connecting shaft 51 along the convex surface 52 and moves away from the roller 31 (towards...). Figure 7 (The direction is counterclockwise).

[0060] According to another embodiment, the adjustment unit 50 is such that if the adjustment screw 53 is tightened, it interacts with the cam unit 40 to move the cam unit 40 away from the roller unit 30; if the adjustment screw 53 is loosened, it interacts with the cam unit 40 to move the cam unit 40 closer to the roller unit 30.

[0061] At this time, the adjusting unit 50 and the cam unit 40 are connected by the connecting shaft 51, and the convex surface 52 of the adjusting unit 50 and the concave surface 44 of the cam unit 40 are rotatably in contact with each other in corresponding shapes. That is, if the adjusting screw 53 is loosened, the adjusting unit 50 moves toward the cam unit 40, and the cam unit 40 moves to approach the roller 31 while rotating around the connecting shaft 51 along the convex surface 52. Figure 7 (The direction is clockwise). Additionally, if the adjusting screw 53 is tightened, the adjusting unit 50 moves away from the cam unit 40, while the cam unit 40 rotates around the connecting shaft 51 along the convex surface 52 and moves away from the roller 31 (towards...). Figure 7 (The direction is counterclockwise).

[0062] On the other hand, a second guide hole 42 in the shape of an elongated hole can be formed in the cam unit 40, and a second guide protrusion 43 can be inserted into the second guide hole 42. This second guide hole 42 and the second guide protrusion 43 can guide the rotation of the cam unit 40 during the operation of the adjusting screw 53. This second guide protrusion 43 can be the fifth joint portion 14 connecting the first link 300 and the third link 500.

[0063] As described above, the degree to which the multi-link hinge 1000 is elastically supported by the elastic member 20 during the opening or closing operation can be adjusted using the adjusting screw 53 of the adjusting unit 50.

[0064] Figure 8This is a perspective view of a multi-link hinge in a separated state, showing the protective plate and connecting components according to an embodiment of the present invention. Figure 9 (a) and (b) are diagrams showing the inner side of a protective plate without an elastic surface layer and the inner side of a protective plate with an elastic surface layer, respectively, according to an embodiment of the present invention. Figure 10 yes Figure 9 Enlarged view of the portion; Figure 11 (a) and (b) are perspective and side views of a connecting member according to an embodiment of the present invention; Figure 12 Figures (a) and (b) are diagrams illustrating the operation of the connecting member in a closed state and an open state according to an embodiment of the present invention.

[0065] Reference Figure 2 , Figure 4 , Figures 8 to 12 The multi-link hinge 1000 of the present invention may further include a protective plate 700 and a connecting component 800.

[0066] More specifically, the multi-link hinge 1000 of the present invention includes: a protective plate 700, rotatably coupled to one of the bottom rod 100 and the top rod 200 via a first shaft 17, preferably the bottom rod 100, covering at least a portion of the space between a plurality of links 300, 400, 500, and 600, which are in opposite positions to each other as the multi-link hinge 1000 is opened or closed; and a connecting member 800 having a first end 810 and a second end 820, the first end 810 being rotatably coupled to the protective plate 700 via a second shaft 18, and the second end 820 being rotatably coupled to one of the plurality of links via a third shaft 19, thereby connecting the protective plate 700 to one of the plurality of links.

[0067] The protective plate 700 may be provided on at least one of the two sides of the multi-link hinge 1000.

[0068] During the operation of the multi-link hinge 1000 as the door opens or closes, gaps can be formed between the multiple links 300, 400, 500, and 600. The protective plate 700 covers these gaps to prevent the user's fingers from getting stuck and injured.

[0069] The connecting component 800 is rotatably coupled to the protective plate 700 via the second shaft 18 and rotatably coupled to one of the plurality of connecting rods via the third shaft 19, preferably the third connecting rod 500, thereby connecting the protective plate 700 and one of the plurality of connecting rods.

[0070] That is, during the operation of the multi-link hinge 1000, when the protective plate 700 rotates about the first axis 17, the connecting component 800 is connected to the protective plate 700 through the second axis 18 to prevent the protective plate 700 from moving away from the multiple links, and is connected to the third link 500 through the third axis 19, so that the protective plate 700 can continuously cover the space between the multiple links.

[0071] This connecting component 800 can be located between multiple connecting rods and the protective plate 700, i.e., inside the protective plate 700, to prevent it from being exposed to the outside. At this time, the first end 810 of the connecting component 800 connected by the second shaft 18 can be shaped to protrude towards the protective plate 700 so as to form a predetermined gap between the protective plate 700 and the connecting component 800; the second end 820 of the connecting component 800 connected by the third shaft 19 can be shaped to protrude towards the third connecting rod 500 so as to form a predetermined gap between the third connecting rod 500 and the connecting component 800.

[0072] On the other hand, the connecting component 800 rotates within a preset rotation radius range R with respect to the second axis 18 during the process of the multi-link hinge 1000 moving from the open position to the closed position or from the closed position to the open position.

[0073] According to one embodiment, the connecting member 800 includes a protrusion 830 protruding into the inner side of the protective plate 700; the protective plate 700 may include a first stop 710 and a second stop 720, which are respectively formed on one end and the other end of a preset rotation radius range R on their inner sides. Thus, during the opening or closing operation of the multi-link hinge 1000, the connecting member 800 can be prevented from exceeding the preset rotation radius range R each time it rotates about the second axis 18. That is, when the connecting member 800 rotates beyond the preset rotation radius range R, the protrusion 830 of the connecting member 800 contacts the first stop 710 or the second stop 720 of the protective plate 700, thereby preventing disengagement.

[0074] On the other hand, the protective plate 700 may also form a circular reinforcing portion 730, which is formed around the second axis 18 to enhance strength. This reinforcing portion 730 may be disposed on the inner side of the protective plate 700 and may be connected to the first stop 710 and the second stop 720.

[0075] Reference Figure 9 (b) According to another embodiment of the invention, the protective plate 700' may have an elastic surface layer 740 formed on at least one side for reducing the operating noise of the multi-link hinge 1000.

[0076] According to one embodiment, the elastic surface layer 740 can be formed by coating one side of the protective plate 700' with a liquid elastic material, preferably by spraying a liquid polyurethane material, but the elastic material and coating method are not limited thereto. Preferably, the elastic surface layer 740 can be formed on the inner side of the protective plate 700', and by forming such an elastic surface layer 740 on the protective plate 700', the operating noise of the multi-link hinge 1000 can be reduced.

[0077] As described above, the multi-link hinge 1000 of the present invention, having a protective plate 700 covering the space between multiple links and internal components, and a connecting member 800 assisting in the operation of the protective plate 700, improves consumer stability and ease of assembly. Furthermore, the degree to which the multi-link hinge 1000 is elastically supported by the elastic member 20 during opening or closing operations can be adjusted using the adjusting screw 53 of the adjusting unit 50.

[0078] The above description of the invention is illustrative, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical concept or essential features of the invention. Therefore, the embodiments described above should be understood as exemplary in all respects and not limiting. For example, the structural components described in the singular can also be implemented separately, and similarly, the separately described components can also be implemented in a combined form.

[0079] The scope of this invention is defined by the claims and should be interpreted as including the meaning and scope of the claims and all changes or modifications derived therefrom.

[0080] Explanation of reference numerals in the attached figures 1000: Multi-link hinge 100: Base rod 200: Push rod 300: First Link 310: Outer border 400: Second Link 500: Third Link 600: Fourth Link 700: Protection board 710: First stop 720: Second stop 730: Reinforcement Section 740: Elastic Surface Layer 800: Connecting component 810: First end 820: Second end 830: Protrusion 10: First joint 11: Second joint 12: Third joint 13: Fourth joint 14: Fifth joint 15: Sixth joint 16: Seventh joint 17: First Axis 18: Second Axis 19: Third Axis 20: Elastic component 30: Roller Unit 30a: Extension 30b: Head 31: Roller 32: First guide hole 33: First guiding protrusion 40: Cam Unit 41: Roller contact surface 42: Second guide hole 43: Second guide protrusion 44: Concave surface 50: Adjustment unit 51: Connecting shaft 52: Convex surface 53: Adjusting screw

Claims

1. A multi-link hinge, comprising a base rod, a top rod, and a plurality of connecting rods connecting the base rod and the top rod, including: A protective plate, rotatably coupled to one of the bottom rod and the top rod via a first axis, and covering at least a portion of the space between the plurality of links, which are positioned relative to each other as the multi-link hinge opens or closes; and A connecting component has a first end and a second end, the first end being rotatably connected to the protective plate via a second axis, and the second end being rotatably connected to one of the plurality of connecting rods via a third axis, thereby connecting the protective plate to one of the plurality of connecting rods.

2. The multi-link hinge according to claim 1, characterized in that, The connecting component is located between the plurality of connecting rods and the protective plate to prevent it from being exposed to the outside.

3. The multi-link hinge according to claim 1, characterized in that, The first axis, the second axis, and the third axis are parallel to each other.

4. The multi-link hinge according to claim 3, characterized in that, The distance between the first axis and the second axis, and the distance between the first axis and the third axis, are greater than the distance between the second axis and the third axis.

5. The multi-link hinge according to claim 1, characterized in that, The connecting component rotates within a preset rotation radius with respect to the second axis during the movement of the multi-link hinge from the open position to the closed position or from the closed position to the open position.

6. The multi-link hinge according to claim 5, characterized in that, The connecting component includes a protrusion protruding into the inner side of the protective plate; the protective plate includes a first stop and a second stop, the first stop and the second stop being formed on one end and the other end of the preset rotation radius range on the inner side, respectively, to prevent the connecting component from deviating from the preset rotation radius range when it rotates about the second axis.

7. The multi-link hinge according to claim 1, characterized in that, Also includes: The elastic component provides elastic force during the opening or closing of the multi-link hinge; A roller unit, elastically supported by the elastic member while linearly moving relative to the elastic member, and having a roller at one end; and The cam unit applies pressure to the roller under the action of the elastic member during the opening or closing of the multi-link hinge.

8. The multi-link hinge according to claim 7, characterized in that, Also includes: An adjustment unit having an adjustment screw and being coupled to the cam unit shaft; As the adjusting screw is tightened or loosened, the adjusting unit interacts with the cam unit to move the cam unit closer to or further away from the roller.

9. The multi-link hinge according to claim 8, characterized in that, The adjustment unit is located on a different connecting rod than the connecting rod on which the roller unit is located.

10. A multi-link hinge, comprising a base rod, a top rod, and a plurality of links connecting the base rod and the top rod, including: A protective plate, rotatably coupled to one of the bottom rod and the top rod via a first axis, and covering at least a portion of the space between the plurality of links, which are positioned relative to each other as the multi-link hinge opens or closes; and A connecting component has a first end and a second end. The first end is rotatably connected to the protective plate via a second axis, and the second end is rotatably connected to one of the plurality of connecting rods via a third axis, thereby connecting the protective plate to one of the plurality of connecting rods. An elastic surface layer is formed on at least one side of the protective plate to reduce the operating noise of the multi-link hinge.

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