A damping hinge

Abstract

This invention relates to the field of door and window accessories technology, and discloses a damping hinge, including a housing assembly, a hinge cup, a first linkage, a second linkage, a torsion spring, a support, and a damper. Utilizing the restoring elastic force of the torsion spring, the hinge cup is brought close to the housing assembly, achieving hinge closure. The support is drivenly connected to either the first or second linkage, and the damper is directly connected to the first pivot and the support. During closure, the first or second linkage can drive the support to slide, thereby pushing the damper. The damping force generated by the damper acts in the opposite direction on the first or second linkage, forming resistance against the torsion spring's return, resulting in a slow closing effect, significantly reducing noise. Since the damper does not need to contact the torsion spring, product stability is ensured, service life is extended, and the product's market competitiveness is improved.

Description

Technical Field

[0001] This invention relates to the field of door and window fittings technology, and in particular to a damping hinge. Background Technology

[0002] Hinges are mainly installed on doors and windows, while they are more often installed on cabinet and furniture doors. According to the material, they are mainly divided into stainless steel hinges and iron hinges. To provide people with a better experience, damping hinges (also known as buffer hinges) have emerged. Their feature is that they provide a buffer function when the cabinet door is closed, minimizing the noise caused by the cabinet door colliding with the cabinet body when it closes.

[0003] In existing hinges, some hinges employ dampers to overcome the resistance of the torsion spring and achieve noise reduction. There are two conventional installation methods for dampers. One method involves the damper's piston rod contacting the torsion spring. However, during use, the torsion spring needs to rotate when the hinge opens or closes, causing friction at the contact point between the damper and the torsion spring, significantly reducing the hinge's stability and lifespan. The other method involves installing a de-blocking damper with a bending top plate on the housing assembly. This method is not only structurally complex, but the significant force generated by the torsion spring and damper during use can damage the bending top plate, affecting its overall usability and failing to meet market demands. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a damping hinge that can protect the damper and has a simple structure, thereby effectively reducing production costs and improving its stability.

[0005] To solve the above-mentioned technical problems, the present invention provides a damping hinge, including a housing assembly, a hinge cup, a first linkage, a second linkage, a torsion spring, a support, and a damper. The housing assembly and the hinge cup are rotatably connected to the first linkage, and the housing assembly and the hinge cup are rotatably connected to the second linkage. A first rotating shaft is mounted on the housing assembly, and the torsion spring is sleeved on the first rotating shaft. The torsion spring connects the first linkage and the housing assembly for pre-tensioning the first linkage and the housing assembly, or the torsion spring connects the second linkage and the housing assembly for pre-tensioning the second linkage and the housing assembly.

[0006] Both the support and the damper are located within the housing assembly. The support is connected to the first linkage or the second linkage, and the damper is connected to the first rotating shaft. When the hinge cup is closed, the first linkage or the second linkage drives the support to slide, thereby pushing the damper so that the damper generates resistance against the return of the torsion spring.

[0007] As a preferred embodiment, the first rotating shaft is provided with a contact section, the winding portion of the torsion spring is installed offset from the contact section, and the damper is connected to the contact section.

[0008] As a preferred embodiment, the damper includes a cylinder, an elastic element, a piston, and a piston rod. The cylinder has a main chamber inside, and the elastic element and the piston are located in the main chamber. One end of the elastic element abuts against the cylinder, and the other end of the elastic element abuts against the piston. The piston rod is disposed on the piston, and the end of the piston rod extends outward toward the front end of the cylinder. The end of the piston rod is connected to the first rotating shaft, and the cylinder is connected to the support seat.

[0009] As a preferred embodiment, the piston rod is provided with a connecting ring at its end, and the connecting ring is located on the contact section.

[0010] As a preferred embodiment, the piston rod has a contact block at its end, and the contact block has an arc surface that connects to the contact section.

[0011] As a preferred embodiment, the end of the piston rod is welded to the contact section.

[0012] As a preferred embodiment, the elastic element is a tension spring that restricts the piston rod from being pulled out, the support seat is provided with a first transmission part connected to the front end of the cylinder body, and the first linkage or the second linkage is provided with a second transmission part that abuts against the first transmission part, so as to push the cylinder body to move away from the first rotating shaft;

[0013] Alternatively, the elastic element may be a compression spring that restricts the piston rod from being pressed in, the second linkage element may be provided with a hook portion, and the support may be provided with a rear side plate connected to the rear end of the cylinder and a hanging port connected to the hook portion, so as to push the cylinder to move closer to the first rotating shaft.

[0014] As a preferred embodiment, the damper includes a cylinder, an elastic element, a piston, and a piston rod. The cylinder has a main chamber inside, and the elastic element and the piston are located in the main chamber. One end of the elastic element abuts against the cylinder, and the other end of the elastic element abuts against the piston. The piston rod is disposed on the piston, and the end of the piston rod extends outward toward the front end of the cylinder. The rear end of the cylinder is connected to the first rotating shaft, and the end of the piston rod is connected to the support seat.

[0015] As a preferred embodiment, the outer wall of the rear end of the cylinder is provided with a groove along its edge, so that the rear end of the cylinder forms a protrusion with a reduced outer diameter, and the protrusion is connected to the first rotating shaft.

[0016] As a preferred embodiment, the outer wall of the rear end of the cylinder is provided with a groove along its edge, and the groove is provided with a baffle, which is connected to the first rotating shaft.

[0017] As a preferred embodiment, the elastic element is a tension spring that restricts the piston rod from being pulled out. The first linkage or the second linkage is provided with a second transmission part. The support seat is provided with a rear side plate connected to the end of the piston rod and a first transmission part that abuts against the second transmission part, so as to push the piston rod to move away from the first rotating shaft.

[0018] Alternatively, the elastic element may be a compression spring that restricts the piston rod from being pressed in, the second linkage element may be provided with a hook portion, and the support may be provided with a rear side plate connected to the end of the piston rod and a hanging opening portion connected to the hook portion, so as to push the piston rod to move closer to the first rotating shaft.

[0019] As a preferred embodiment, the support includes a left side plate, a right side plate, and a top plate. The left side plate is disposed on one side of the top plate, and the right side plate is disposed on the other side of the top plate, so that the left side plate, the right side plate, and the top plate form a mounting cavity for mounting the damper.

[0020] As a preferred embodiment, the housing assembly is provided with a limiting rod for restricting the back-and-forth sliding of the support, and the top plate abuts against the limiting rod.

[0021] As a preferred embodiment, the top plate is provided with a sliding surface that protrudes away from the mounting cavity, and the sliding surface abuts against the limiting rod.

[0022] As a preferred embodiment, one end of the first linkage is rotatably connected to the housing assembly via the first pivot, the other end of the first linkage is rotatably connected to the hinge cup via the third pivot, the second linkage is rotatably connected to the housing assembly via the second pivot, and the second linkage is rotatably connected to the hinge cup via the fourth pivot.

[0023] As a preferred embodiment, the first transmission arm of the torsion spring abuts against the housing assembly via the second rotating shaft, and the second transmission arm of the torsion spring abuts against the first linkage via the third rotating shaft.

[0024] As a preferred embodiment, the support base and the damper are integrally formed.

[0025] The damping hinge provided by this invention has the following advantages compared with the prior art:

[0026] In this invention, the restoring elastic force of the torsion spring acts between the first linkage and the outer shell assembly, or between the second linkage and the outer shell assembly, causing the hinge cup to approach the outer shell assembly and achieve hinge closure. The damper is directly connected to the first pivot and the support. During closure, the first or second linkage can drive the support to slide, thereby pushing the damper. The damping force generated by the damper acts in the opposite direction on the first or second linkage, forming resistance against the torsion spring's return, resulting in a slow closure and significantly reducing noise. Since the damper does not need to contact the torsion spring, the internal structure is more compact, product stability is ensured, and service life is extended, greatly improving the product's market competitiveness. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the damping hinge in the open state according to Embodiment 1 of the present invention.

[0028] Figure 2 This is a schematic diagram of the damping hinge in the closed state according to Embodiment 1 of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the damping hinge without the first linkage in Embodiment 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the damping hinge without the second linkage in Embodiment 1 of the present invention.

[0031] Figure 5 This is a schematic diagram of the exploded structure of the damping hinge according to Embodiment 1 of the present invention.

[0032] Figure 6 This is a schematic diagram of the assembly structure of the damper and the first rotating shaft in the damping hinge of Embodiment 1 of the present invention.

[0033] Figure 7 This is a schematic diagram of another assembly structure of the damper and the first rotating shaft in the damping hinge of Embodiment 1 of the present invention.

[0034] Figure 8 This is a schematic diagram of the support seat in the damping hinge of Embodiment 1 of the present invention.

[0035] Figure 9 for Figure 8 Another perspective on the structure.

[0036] Figure 10 This is a schematic diagram of the structure of the second linkage in the damping hinge of Embodiment 1 of the present invention.

[0037] Figure 11This is a schematic diagram of an open state structure of the damping hinge according to Embodiment 2 of the present invention.

[0038] Figure 12 This is a schematic diagram of the internal structure of a damping hinge according to Embodiment 2 of the present invention.

[0039] Figure 13 This is a schematic diagram of another open state structure of the damping hinge according to Embodiment 2 of the present invention.

[0040] Figure 14 This is a schematic diagram of another closed state structure of the damping hinge according to Embodiment 2 of the present invention.

[0041] Figure 15 This is a schematic diagram of the internal structure of the damping hinge in Embodiment 3 of the present invention.

[0042] Figure 16 This is a schematic diagram of the damper in the damping hinge of Embodiment 3 of the present invention.

[0043] Figure 17 This is a schematic diagram of the structure of the barrier in the damping hinge of Embodiment 3 of the present invention.

[0044] Figure 18 This is a schematic diagram of an open state structure of the damping hinge according to Embodiment 4 of the present invention.

[0045] Figure 19 This is a schematic diagram of a closed state structure of the damping hinge according to Embodiment 4 of the present invention.

[0046] Figure 20 This is a schematic diagram of another open state structure of the damping hinge according to Embodiment 4 of the present invention.

[0047] Figure 21 This is a schematic diagram of another closed state structure of the damping hinge in Embodiment 4 of the present invention.

[0048] In the diagram: 1. Outer shell assembly; 2. Hinge cup; 3. First linkage; 31. Second transmission part; 4. Second linkage; 41. Hook part; 5. Torsion spring; 6. Support seat; 61. Rear side plate; 61a. Positioning part; 62. Hanging port part; 63. Left side plate; 64. Right side plate; 65. Top plate; 65a. Sliding surface; 66. Mounting cavity; 67. Tube head; 68. First transmission part; 7. Damper; 71. Cylinder body; 71a. Groove; 71b. Protrusion; 72. Elastic element; 73. Piston; 74. Piston rod; 74a. Connecting ring; 74b. Abutment block; 75. Main chamber; 76. Sub-chamber; 8. First rotating shaft; 8a. Abutment section; 9. Second rotating shaft; 10. Third rotating shaft; 11. Fourth rotating shaft; 12. Limiting rod; 13. Barrier. Detailed Implementation

[0049] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0050] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Example 1

[0053] like Figures 1 to 10 As shown, Embodiment 1 of the present invention provides a damping hinge, including a housing assembly 1, a hinge cup 2, a first linkage 3, a second linkage 4, a torsion spring 5, a support 6, and a damper 7. The housing assembly 1 and the hinge cup 2 are rotatably connected to the first linkage 3, and the housing assembly 1 and the hinge cup 2 are rotatably connected to the second linkage 4. A first rotating shaft 8 is mounted on the housing assembly 1, and the torsion spring 5 is sleeved on the first rotating shaft 8. The torsion spring 5 connects the first linkage 3 and the housing assembly 1 for pre-tensioning the first linkage 3 and the housing assembly 1, or the torsion spring 5 connects the second linkage 4 and the housing assembly 1 for pre-tensioning the second linkage 4 and the housing assembly 1.

[0054] Both the support 6 and the damper 7 are located inside the housing assembly 1. The support 6 is connected to the first linkage 3 or the second linkage 4, and the damper 7 is connected to the first rotating shaft 8. When the hinge cup 2 is closed, the first linkage 3 or the second linkage 4 drives the support 6 to slide, thereby pushing the damper 7 so that the damper 7 generates resistance against the return of the torsion spring 5.

[0055] Based on the above-mentioned technical features, the damping hinge utilizes the restoring elastic force of the torsion spring 5 acting between the first linkage 3 and the outer shell assembly 1, or between the second linkage 4 and the outer shell assembly 1, causing the hinge cup 2 to approach the outer shell assembly 1, thereby closing the hinge. The damper 7 is directly connected to the first pivot 8 and the support 6. During the closing process, the first linkage 3 or the second linkage 4 can drive the support 6 to slide, thereby pushing the damper 7. The damping force generated by the damper 7 acts in the opposite direction on the first linkage 3 or the second linkage 4, forming resistance against the return of the torsion spring 5, achieving a slow closing effect and greatly reducing noise. The damper 7 does not need to contact the torsion spring 5, making the internal structure more compact, ensuring product stability, extending service life, and greatly improving the product's market competitiveness.

[0056] Among them, combined Figures 1 to 2 As shown, one end of the first linkage 3 is rotatably connected to the outer casing assembly 1 via the first rotating shaft 8. Using the first rotating shaft 8 with the torsion spring 5 to rotatably connect the first linkage 3 reduces the number of rotating shafts, saves installation space, and lowers production costs. The other end of the first linkage 3 is rotatably connected to the hinge cup 2 via the third rotating shaft 10. The second linkage 4 is rotatably connected to the outer casing assembly 1 via the second rotating shaft 9, and the second linkage 4 is rotatably connected to the hinge cup 2 via the fourth rotating shaft 11. During the hinge closing process, the first transmission arm of the torsion spring 5 presses against the outer casing assembly 1. The restoring elastic force of the torsion spring 5 enables its second transmission arm to pull the first linkage 3 or the second linkage 4 to rotate. How the torsion spring 5 acts on the first linkage 3 or the second linkage 4 can be achieved using existing structures, which are not the focus of this invention and will not be detailed here.

[0057] In this embodiment, as Figure 3 and Figure 4 As shown, the first rotating shaft 8 has a contact section 8a. The winding portion of the torsion spring 5 is installed offset from the contact section 8a. The damper 7 is connected to the contact section 8a. There is one torsion spring 5. The winding portion of the torsion spring 5 has a gap exposing the contact section 8a, through which the damper 7 can be directly connected to the contact section 8a. It can be understood that there can also be multiple torsion springs 5. The contact section 8a is located between the winding portions of two adjacent torsion springs 5, that is, the contact section 8a is not wound by the winding portion of the torsion spring 5.

[0058] refer to Figure 16The damper shown in this embodiment includes a cylinder 71, an elastic element 72, a piston 73, and a piston rod 74. The cylinder 71 has a main chamber 75 inside, and the elastic element 72 and the piston 73 are located within the main chamber 75. One end of the elastic element 72 abuts against the cylinder 71, and the other end abuts against the piston 73. The piston rod 74 is mounted on the piston 73, and its end extends outward from the front end of the cylinder 71. Figure 1 As shown, the end of the piston rod 74 is connected to the first rotating shaft 8, and the cylinder 71 is connected to the support seat 6; more specifically, the cylinder 71 is a cylinder, and the piston rod 74 can drive the piston 73 to slide back and forth relative to the main chamber 75 to generate a damping force against the elastic force of the elastic element 72.

[0059] In one implementation, such as Figure 6 As shown, the piston rod 74 has a connecting ring 74a at its end. The connecting ring 74a is located on the abutment section 8a. That is, the end of the piston rod 74 is bent into a ring structure and can be movably fitted onto the first rotating shaft 8, so that it can be installed on the first rotating shaft 8. It has good stability and is easy to install.

[0060] As an equivalent embodiment of this embodiment, such as Figure 7 As shown, the end of the piston rod 74 may also be provided with a contact block 74b. The contact block 74b has an arc surface that connects to the contact section 8a. The contact block 74b directly abuts or is fixedly connected to the first rotating shaft 8. The arc surface can better fit the circular side wall of the first rotating shaft 8, reducing the installation space.

[0061] As an equivalent embodiment of this embodiment, the end of the piston rod 74 can also be directly welded to the contact section 8a, which provides better stability and reduces production costs.

[0062] In this embodiment, the elastic element 72 is a compression spring that restricts the piston rod 74 from being pressed in, such as... Figure 10 As shown, the second linkage 4 has a hook portion 41 at one end near the housing assembly 1, such as... Figure 8 and Figure 9 As shown, the support 6 is provided with a rear side plate 61 connected to the rear end of the cylinder 71 and a hook portion 62 connected to the hook portion 41, so as to push the cylinder 71 to move closer to the first rotating shaft 8, in combination with Figure 1 and Figure 2As shown, when the hinge is closed, the hook part 41 can rotate around the second rotating shaft 9, and pull the support seat 6 towards the first rotating shaft 8 through the hanging mouth part 62, thereby pushing the cylinder 71 to move. The piston rod 74 is fixed under the restriction of the first rotating shaft 8, so that the damper 7 generates a damping force to act in the opposite direction on the second linkage 4, slowing down its rotation speed and achieving a noise reduction effect.

[0063] In this embodiment, as Figure 8 and Figure 9 As shown, the support 6 includes a left side plate 63, a right side plate 64, and a top plate 65. The left side plate 63 is disposed on one side of the top plate 65, and the right side plate 64 is disposed on the other side of the top plate 65, so that the left side plate 63, the right side plate 64, and the top plate 65 form a mounting cavity 66 for mounting the damper 7. The mounting cavity 66 is U-shaped. The rear side plate 61 seals the rear end of the mounting cavity 66 to abut against the rear end of the cylinder 71. The support 6 abuts against the inner wall surface of the outer shell assembly 1 to surround the mounting cavity 66 and prevent the damper 7 from detaching from the mounting cavity 66.

[0064] Furthermore, reinforcing ribs are provided at the connection positions between the left side plate 63 and the top plate 65, and between the right side plate 64 and the top plate 65. These reinforcing ribs can be formed by stamping, that is, the mounting cavity 66 is formed by stamping, which further ensures the overall strength. The rear side plate 61 is provided with a positioning part 61a at the opening position of the mounting cavity 66. The positioning part 61a protrudes 0.5-3mm relative to the plane where the opening of the mounting cavity 66 is located. It can control the overall height of the rear side plate 61 during the production of the support 6, improve the product tolerance, and provide a reference height value for the rear side plate 61 when automatically installed, improving the overall uniformity of the parts. This makes the height of the parts more controllable during the bending process and is suitable for automated processing.

[0065] In this embodiment, as Figures 1 to 5 As shown, the outer casing assembly 1 is provided with a limiting rod 12 to restrict the forward and backward sliding of the support seat 6. The limiting rod 12 spans between the two side plates of the outer casing assembly 1, and the top plate 65 abuts against the limiting rod 12, restricting the support seat 6 from detaching from the outer casing assembly 1. That is, under the action of the limiting rod 12, the support seat 6 can only move forward and backward inside the outer casing assembly 1. In addition, it can be understood that the limiting rod 12 can also directly abut against the cylinder body 71, which can also restrict the damper 7 from detaching from the outer casing assembly 1.

[0066] Furthermore, in combination Figure 8As shown, the top plate 65 is provided with a sliding surface 65a that protrudes away from the mounting cavity 66. The sliding surface 65a abuts against the limiting rod 12. The sliding surface 65a is a strip-shaped surface and is located at the center of the top plate 65. The area of ​​the sliding surface 65a is smaller than the area of ​​the top plate 65, so that the overall structure will not damage the surface of the top plate 65 during operation and is smoother. Especially when sliding in contact with the limiting rod 12, the smaller sliding surface 65a can reduce friction and provide the overall tube positive load of the damper 7, resulting in more stable overall performance.

[0067] Furthermore, such as Figure 4 , Figure 8 and Figure 9 As shown, both the left side plate 63 and the right side plate 64 are provided with tube sections 67 extending outward. The tube sections 67 on both sides abut against the inner wall of the outer shell assembly 1, ensuring that the support 6 slides back and forth along the outer shell assembly 1 and avoids left and right swaying.

[0068] As an equivalent embodiment of this embodiment, the first transmission arm of the torsion spring 5 can also abut against the housing assembly 1 via the second rotating shaft 9, while the second transmission arm of the torsion spring 5 abuts against the first linkage 3 via the third rotating shaft 10, and the hinge is closed by pulling the third rotating shaft 10.

[0069] As an equivalent embodiment of this example, the first transmission arm of the torsion spring 5 can also abut against the outer casing assembly 1 via the second rotating shaft 9, while the second transmission arm of the torsion spring 5 abuts against the transmission shaft on the second linkage 4. The spring force acts on the transmission shaft, pushing the second linkage 4 to rotate, thereby closing the hinge. In this embodiment, the support 6 and the damper 7 are integrally formed, or the support 6 and the damper 7 are two different parts forming a mechanism assembly.

[0070] Example 2

[0071] The main difference between this embodiment and Embodiment 1 is the specific structure of the elastic element 72 and the support 6; the structure of the other parts will not be described in detail here.

[0072] like Figures 11 to 12As shown, the elastic element 72 is a tension spring that restricts the piston rod 74 from being pulled out. The support seat 6 is provided with a first transmission part 68 connected to the front end of the cylinder body 71. The first linkage 3 is provided with a second transmission part 31 that abuts against the first transmission part 68 to push the cylinder body 71 to move away from the first rotating shaft 8. The first transmission part 68 is a guide slope, and the second transmission part 31 is provided with an arc surface that abuts against the guide slope. When the hinge is closed, the first linkage 3 rotates along the first rotating shaft 8, and the second transmission part 31 can press against the first transmission part 68, pushing it to move away from the first rotating shaft 8, thereby pushing the cylinder body 71 to move. The piston rod 74 is fixed under the restriction of the first rotating shaft 8 so that the damper 7 generates a damping force that acts in the opposite direction on the first linkage 3, slowing down its rotation speed and achieving a noise reduction effect.

[0073] It is understandable that, because the first linkage 3 and the second linkage 4 move in the same direction, the second linkage 4 can also be configured with the same structure to push the support 6 away from the first rotating shaft 8, thus achieving the same purpose. Combined with... Figures 13 to 14 As shown, the second transmission part 31 can be disposed on the second linkage 4. When the second linkage 4 rotates along the second rotating shaft 9, the second transmission part 31 can press against the first transmission part 68 and push it to move away from the first rotating shaft 8, thereby pushing the cylinder 71 to move. The piston rod 74 is fixed under the restriction of the first rotating shaft 8, so that the damper 7 generates a damping force to act in the opposite direction on the second linkage 4, slowing down its rotation speed and achieving a noise reduction effect.

[0074] In this embodiment, the support seat 6 and the rear end of the cylinder body 71 are not assembled, so there is no need to set the rear side plate 61. Therefore, the front end of the mounting cavity 66 is sealed by the first transmission part 68. The first transmission part 68 is provided with a gap groove for the piston rod 74 to pass through, so as to ensure that the piston rod 74 can be connected to the first rotating shaft 8.

[0075] Example 3

[0076] The main difference between this embodiment and Embodiment 1 is that the damper 7 is positioned in the opposite direction; the structure of the other parts will not be described in detail here.

[0077] like Figures 15 to 17As shown, the damper 7 includes a cylinder 71, an elastic element 72, a piston 73, and a piston rod 74. The cylinder 71 has a main chamber 75 inside, and the elastic element 72 and the piston 73 are located within the main chamber 75. One end of the elastic element 72 abuts against the cylinder 71, and the other end of the elastic element 72 abuts against the piston 73. The piston rod 74 is mounted on the piston 73, and the end of the piston rod 74 extends outwards towards the front end of the cylinder 71. Figure 15 As shown, the rear end of the cylinder 71 is connected to the first rotating shaft 8, and the end of the piston rod 74 is connected to the support seat 6. The cylinder 71 is a cylinder, and the support seat 6 pushes the piston rod 74, thereby driving the piston 73 to slide back and forth relative to the main chamber 75, counteracting the elastic force of the elastic member 72 to generate a damping force.

[0078] Among them, such as Figure 16 As shown, in one embodiment, a groove 71a is formed on the outer wall of the rear end of the cylinder 71 along its edge. The groove 71a is annular, so that the rear end of the cylinder 71 forms a protrusion 71b with a reduced outer diameter. The protrusion 71b is connected to the first rotating shaft 8. The protrusion 71b can play a reinforcing role, so that the rear end of the cylinder 71 is not easily deformed or damaged when subjected to force. The first rotating shaft 8 can abut against the protrusion 71b, or it can pass through the protrusion 71b perpendicular to the axial direction of the cylinder 71. The protrusion 71b defines a sub-chamber 76 communicating with the main chamber 75 at the rear end of the cylinder 71. The end of the elastic member 72 can abut against the sub-chamber 76, which plays a corrective role for the elastic member 72 and extends the service life of the elastic member 72. The groove 71a can save some space for the damper 7 and other components to cooperate, saving internal installation space.

[0079] As an equivalent embodiment of this embodiment, such as Figure 17 As shown, an annular baffle 13 is provided in the groove 71a. The height of the baffle 13 is greater than the height of the groove 71a. The first rotating shaft 8 abuts against or is fixedly connected to the baffle 13, which can further improve the connection strength between the cylinder body 71 and the first rotating shaft 8.

[0080] In this embodiment, combined with Figure 15As shown, the elastic element 72 is a compression spring that restricts the piston rod 74 from being pressed in. The second linkage 4 is provided with a hook portion 41. The support seat 6 is provided with a rear side plate 61 connected to the end of the piston rod 74 and a hanging opening portion 62 connected to the hook portion 41, so as to push the piston rod 74 to move closer to the first rotating shaft 8. When the hinge is closed, the hook portion 41 can rotate around the second rotating shaft 9, and pull the support seat 6 closer to the first rotating shaft 8 through the hanging opening portion 62, thereby pushing the piston rod 74 to move. The cylinder body 71 is fixed under the restriction of the first rotating shaft 8, so that the damper 7 generates a damping force acting in the opposite direction on the second linkage 4, slowing down its rotation speed and achieving a noise reduction effect.

[0081] Example 4

[0082] The main difference between this embodiment and Embodiment 3 is the specific structure of the elastic element 72 and the support 6; the structure of the other parts will not be described in detail here.

[0083] like Figures 18 to 19 As shown, the elastic element 72 is a tension spring that restricts the piston rod 74 from being pulled out. The first linkage 3 is provided with a second transmission part 31. The support seat 6 is provided with a rear side plate 61 connected to the end of the piston rod 74 and a first transmission part 68 abutting against the second transmission part 31 to push the piston rod 74 to move away from the first rotating shaft 8. The first transmission part 68 is a guide slope. The second transmission part 31 is provided with an arc surface abutting against the guide slope. The rear side plate 61 is connected to the piston rod 74. When the hinge is closed, the first linkage 3 rotates along the first rotating shaft 8. The second transmission part 31 can press against the first transmission part 68 and push it to move away from the first rotating shaft 8. The piston rod 74 is pulled out through the rear side plate 61. The cylinder 71 is fixed under the restriction of the first rotating shaft 8 so that the damper 7 generates a damping force that acts in the opposite direction on the first linkage 3 to slow down its rotation speed and achieve a noise reduction effect.

[0084] It is understandable that, because the first linkage 3 and the second linkage 4 move in the same direction, the second linkage 4 can also be configured with the same structure to push the support 6 away from the first rotating shaft 8, thus achieving the same purpose. Figures 20 to 21As shown, the second transmission part 31 can be disposed on the second linkage 4. When the second linkage 4 rotates along the second rotating shaft 9, the second transmission part 31 can press against the first transmission part 68 and push it to move away from the first rotating shaft 8, thereby pushing the piston rod 74 out. The cylinder 71 is fixed under the restriction of the first rotating shaft 8, so that the damper 7 generates a damping force to act in the opposite direction on the second linkage 4, slowing down its rotation speed and achieving a noise reduction effect.

[0085] The main working principle of the hinge described in the above embodiments is as follows: During the hinge closing process, the restoring elastic force of the torsion spring 5 pulls the first linkage 3 or the second linkage 4 to rotate, and then pushes the damper 7 through the support seat 6. Under the restriction of the first rotating shaft 8, the damper 7 generates a damping force, which acts in the opposite direction on the first linkage 3 or the second linkage 4, that is, it generates resistance to the restoring elastic force of the torsion spring 5, thereby achieving a buffering effect.

[0086] In summary, the damping hinge provided by the above embodiments of the present invention has the following advantages: By connecting the first rotating shaft 8 to the damper 7, the damper 7 and the torsion spring 5 do not need to rotate against each other, resulting in a simple and compact internal structure that greatly improves the service life of the damper 7. Furthermore, by cooperating with the support seat 6 through the first linkage 3 or the second linkage 4, the damper 7 can be quickly pushed, causing the damper 7 to generate resistance against the torsion spring 5's return to its original position. This results in better overall structural stability and strength, reduces the overall cost of the product, and enhances its market competitiveness.

[0087] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A damping hinge, characterized in that, The device includes a housing assembly, a hinge cup, a first linkage, a second linkage, a torsion spring, a support, and a damper. The housing assembly and the hinge cup are rotatably connected to the first linkage, and the housing assembly and the hinge cup are rotatably connected to the second linkage. A first rotating shaft is mounted on the housing assembly, and the torsion spring is sleeved on the first rotating shaft. The torsion spring connects the first linkage and the housing assembly for pre-tensioning the first linkage and the housing assembly, or the torsion spring connects the second linkage and the housing assembly for pre-tensioning the second linkage and the housing assembly. Both the support and the damper are located inside the housing assembly. The support is connected to the first linkage or the second linkage, and the damper is connected to the first rotating shaft. When the hinge cup is closed, the first linkage or the second linkage drives the support to slide, thereby pushing the damper so that the damper generates resistance against the return of the torsion spring. The damper includes a cylinder body, and a groove is formed on the outer wall of the rear end of the cylinder body along its edge so that the rear end of the cylinder body forms a protrusion with a reduced outer diameter. The groove is provided with a baffle, and the baffle is connected to the first rotating shaft. The support seat is provided with a rear side plate that is connected to the rear end of the cylinder body.

2. The damping hinge according to claim 1, characterized in that, The first rotating shaft has a contact section, the winding portion of the torsion spring is installed offset from the contact section, and the damper is connected to the contact section.

3. The damping hinge according to claim 2, characterized in that, The damper includes an elastic element, a piston, and a piston rod. The cylinder body has a main chamber inside, and the elastic element and the piston are located in the main chamber. One end of the elastic element abuts against the cylinder body, and the other end of the elastic element abuts against the piston. The piston rod is disposed on the piston, and the end of the piston rod extends outward toward the front end of the cylinder body. The end of the piston rod is connected to the first rotating shaft, and the cylinder body is connected to the support seat.

4. The damping hinge according to claim 3, characterized in that, The piston rod is provided with a connecting ring at its end, and the connecting ring is located on the contact section.

5. The damping hinge according to claim 3, characterized in that, The piston rod has a contact block at its end, and the contact block has an arc surface that connects to the contact section.

6. The damping hinge according to claim 3, characterized in that, The end of the piston rod is welded to the contact section.

7. The damping hinge according to any one of claims 3 to 6, characterized in that, The elastic element is a tension spring that restricts the piston rod from being pulled out. The support seat is provided with a first transmission part connected to the front end of the cylinder body. The first linkage or the second linkage is provided with a second transmission part that abuts against the first transmission part, so as to push the cylinder body to move away from the first rotating shaft. Alternatively, the elastic element may be a compression spring that restricts the piston rod from being pressed in, the second linkage element may be provided with a hook portion, and the support may be provided with a hanging port portion connected to the hook portion, so as to push the cylinder body to move closer to the first rotating shaft.

8. The damping hinge according to claim 1, characterized in that, The damper includes an elastic element, a piston, and a piston rod. The cylinder body has a main chamber inside, and the elastic element and the piston are located in the main chamber. One end of the elastic element abuts against the cylinder body, and the other end of the elastic element abuts against the piston. The piston rod is disposed on the piston, and the end of the piston rod extends outward toward the front end of the cylinder body. The rear end of the cylinder body is connected to the first rotating shaft, and the end of the piston rod is connected to the support seat.

9. The damping hinge according to claim 1, characterized in that, The outer wall of the rear end of the cylinder is provided with a groove along its edge, and the groove is provided with a baffle, which is connected to the first rotating shaft.

10. The damping hinge according to claim 8, characterized in that, The elastic element is a tension spring that restricts the piston rod from being pulled out. The first linkage or the second linkage is provided with a second transmission part. The support seat is provided with a first transmission part that abuts against the second transmission part to push the piston rod to move away from the first rotating shaft. Alternatively, the elastic element may be a compression spring that restricts the piston rod from being pressed in, the second linkage element may be provided with a hook portion, and the support may be provided with a hanging opening portion connected to the hook portion, so as to push the piston rod to move closer to the first rotating shaft.

11. The damping hinge according to claim 1, characterized in that, The support includes a left side plate, a right side plate, and a top plate. The left side plate is located on one side of the top plate, and the right side plate is located on the other side of the top plate, so that the left side plate, the right side plate, and the top plate form a mounting cavity for mounting the damper.

12. The damping hinge according to claim 11, characterized in that, The outer casing assembly is provided with a limiting rod for restricting the back-and-forth sliding of the support seat, and the top plate abuts against the limiting rod.

13. The damping hinge according to claim 12, characterized in that, The top plate is provided with a sliding surface that protrudes away from the mounting cavity, and the sliding surface abuts against the limiting rod.

14. The damping hinge according to claim 1, characterized in that, One end of the first linkage is rotatably connected to the housing assembly via the first pivot, and the other end of the first linkage is rotatably connected to the hinge cup via the third pivot. The second linkage is rotatably connected to the housing assembly via the second pivot, and the second linkage is rotatably connected to the hinge cup via the fourth pivot.

15. The damping hinge according to claim 14, characterized in that, The first transmission arm of the torsion spring abuts against the housing assembly via the second rotating shaft, and the second transmission arm of the torsion spring abuts against the first linkage via the third rotating shaft.

16. The damping hinge according to claim 1, characterized in that, The support base and the damper are integrally formed.

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