Damping type rebound hinge

Abstract

The utility model relates to the technical field of hinges, in particular to a damping type rebound hinge which comprises a hinge cup, a base, a damper, a connecting arm, a power arm and a swing block, the connecting arm and the power arm are hinged between the hinge cup and the base, the swing block is hinged in the base, the damper comprises a cylinder body, a piston, a piston rod, a first spring and a second spring, and the piston slides in the inner wall of the cylinder body. One end of the piston rod is connected with the piston, the other end of the piston rod is assembled with one end of the swing block, the other end of the swing block is hinged to the end, away from the hinge cup, of the power arm, and the piston rod is sleeved with the first spring which is located between the top wall of the cylinder body and the top wall of the piston. The two ends of the second spring abut against the bottom wall of the piston and the top wall of the cylinder body correspondingly, the elasticity of the second spring is larger than that of the first spring, switching between a damping type rebound hinge and a non-force hinge is achieved through one hinge, parts of the rebound hinge are simplified, the production and assembly cost of the rebound hinge is reduced, the use experience is improved, and the market requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a damping rebound hinge. Background Art

[0002] The rebound hinge is a hinge with a damping function, which is mainly used for connecting the door panel and the side panel of furniture. Through the built-in damping device, the connected door panel moves slowly and smoothly during the opening and closing process. Compared with the traditional hinge that can be in two states of normally open or normally closed, the rebound hinge is in the normally open state without the action of external force. It is suitable for occasions such as hidden doors that need to be kept normally open and without handles. With the extreme simplification of the furniture design style, the design of the cabinet door adopts a handleless hidden door. The rebound hinge needs to be used with a rebounder. By installing the rebounder on the side panel, the door panel and the side panel are connected with the rebound hinge, so that after pressing the door panel, the door panel and the side panel are separated, and under the action of the rebound hinge, the door panel is pushed to open. When the door panel is closed, the rebounder sucks the door panel to overcome the rebound force of the rebound hinge, so that the door panel is in the closed state.

[0003] In the prior art, a Chinese patent with publication number CN219299045U discloses a rebound hinge, which includes a hinge cup, a hinge seat, a connecting rod arm and a power arm hinged between the hinge cup and the hinge seat, a torsion spring driving the power arm to open and swing, and a swing block and a damper hinged in the hinge seat, wherein the swing end of the swing block is hinged to the telescopic end of the damper, and the swing end of the swing block is plug-in connected to the swing end of the power arm, the torsion spring is installed on the hinge shaft of the power arm and the hinge seat, one torsion arm abuts against the hinge seat, and the other torsion arm abuts against the swing end of the power arm, under the torsion of the torsion spring, the power arm always keeps swinging in the hinge opening direction until it hits the hinge shaft of the connecting rod arm and the hinge seat, at which time, the hinge is opened to the maximum extent;

[0004] With regard to the above-mentioned related technologies, the inventor believes that there are the following defects: the rebound of the hinge is achieved by designing the installation position of the torsion spring, which is similar to the structure adopted by the traditional hinge and has a complex structure. That is, a torsion spring and a cross pin for compressing the torsion spring torsion arm are still required, which increases the difficulty of production and assembly and reduces production efficiency. Moreover, the torsion spring is riveted on the hinge arm. Once the torsion spring fails, it is difficult to replace it separately, and the maintenance difficulty and cost are relatively high. In addition, for the scenario where the rebounder has a buffering effect, the rebound hinge cannot be switched to a powerless hinge, and re-selection is required, and the compatibility is poor. Utility Model Content

[0005] In order to simplify the structure of the rebound hinge and be able to switch between a damping hinge and a powerless hinge, the present application provides a damping rebound hinge.

[0006] The utility model provides a damping rebound hinge adopts the following technical solution:

[0007] A damping rebound hinge comprises a hinge cup, a base, a damper, a connecting arm and a power arm hinged between the hinge cup and the base, and a swing block hinged in the base, the damper comprises a cylinder body, a piston, a piston rod, a first spring, and a second spring, the piston slides in the inner wall of the cylinder body, one end of the piston rod is connected to the piston, the other end of the piston rod is assembled with one end of the swing block, the other end of the swing block is hinged with an end of the power arm away from the hinge cup, the first spring is sleeved outside the piston rod, and the first spring is located between the top wall of the cylinder body and the top wall of the piston, the two ends of the second spring are respectively abutted against the bottom wall of the piston and the top wall of the cylinder body, and the elastic force of the second spring is greater than the elastic force of the first spring.

[0008] Preferably, the damper further comprises a first hook, one end of which is connected to the piston rod, and the other end of which is engaged and assembled with the swing block.

[0009] Preferably, the base includes a hinge arm for being hinged to the connecting arm and a hinge seat for being assembled with the side panel, the hinge seat is assembled with the hinge arm, the cylinder body is assembled in the hinge seat, and the inner side wall of the hinge seat has a protruding limit portion, and the limit portion is correspondingly arranged on both radial sides of the cylinder body.

[0010] Preferably, it also includes a first connecting pin and an adjusting screw, the side wall of the hinge seat is provided with a long hole, the first connecting pin is passed through the long hole, and the two ends of the first connecting pin are connected to the side wall of the hinge arm, the adjusting screw is connected to the hinge arm and the hinge seat, and is used to adjust the relative position of the hinge seat and the hinge arm.

[0011] Preferably, the cylinder body is provided with a second hook for engaging the first connecting pin, and the second hook is protruded and extends from the bottom wall of the cylinder body toward the outer ring wall of the first connecting pin.

[0012] Preferably, the opening directions of the first hook and the second hook are the same. When one end of the damper is engaged with the swing block and the other end of the damper is engaged with the first connecting pin, the opening of the first hook and the opening of the second hook are both facing the top wall of the hinge arm.

[0013] Preferably, it also includes a U-shaped pin and a second connecting pin, one end of the U-shaped pin is used to hinge the connecting arm to the hinge cup, one end of the U-shaped pin is used to hinge one end of the power arm to the hinge cup, and the second connecting pin is used to hinge the other end of the power arm to the hinge arm.

[0014] Preferably, it also includes a third connecting pin, and the power arm is hinged with a connecting rod at one end close to the second connecting pin, and the other end of the connecting rod is hinged to the swing block, and the third connecting pin is used to hinge the swing block to the hinge arm, and the hinge point between the connecting rod and the swing block is located above the third connecting pin, and the hinge point between the damper and the swing block is located below the third connecting pin.

[0015] Preferably, the hinge center of the connecting rod and the swing block is point A, the hinge center of the damper and the swing block is point B, the center of the third connecting pin is point O, |AO|:|BO|=(7-8):10.

[0016] Preferably, the wire diameter of the second torsion spring is 0.7-1.0 mm.

[0017] The beneficial effects of the utility model are:

[0018] By designing the elastic force of the first spring and the second spring of the buffer, the elastic force of the second spring overcomes the elastic force of the first spring, so that the hinge is in a normally open state. The effect of the rebound hinge can be achieved without adopting the torsion spring and cross pin structure in the prior art, simplifying the parts of the rebound hinge, and reducing the production and assembly costs of the rebound hinge. Due to the reduction in parts, the assembly process is simpler and the assembly efficiency is improved. Secondly, the number of mechanical parts is reduced, the potential failure points are reduced, and the reliability of the product is improved. Furthermore, the design of the damper can smoothly control the closing speed of the door panel, prevent rapid rebound, improve the safety of use, effectively reduce the impact and noise when the door panel is closed, enhance the user experience, and meet market demand.

[0019] By providing a first hook and a second hook, the damper and the swing block are clutched by the first hook, and the damper and the base are clutched by the second hook, and the switching between the damped rebound hinge and the powerless hinge is achieved through a hinge. The switching is performed according to actual use, which reduces the inventory demand for hinges of different models and reduces the cost and difficulty of inventory management. Secondly, the installer can switch the damping function of the hinge on site according to actual needs, which improves the flexibility and convenience of installation and ensures the opening and closing effect of the door panel. Furthermore, if the damping of the rebounder fails, it can be quickly switched to the damped rebound hinge mode to meet the user's continued use of the buffered opening and closing of the door panel, which is convenient for subsequent maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram in the embodiment of the present application;

[0021] Figure 2 It is a disassembled stereogram in an embodiment of the present application;

[0022] Figure 3is a three-dimensional diagram of a hinge seat in an embodiment of the present application;

[0023] Figure 4 It is a front view of the assembly of the damper and the power arm in the embodiment of the present application;

[0024] Figure 5 yes Figure 4 Stereoscopic diagram in

[0025] Figure 6 is a cross-sectional view of the assembly of the damper and the power arm in the embodiment of the present application;

[0026] Figure 7 yes Figure 4 Exploded stereogram in .

[0027] Explanation of the reference numerals in the accompanying drawings: 1. hinge cup; 2. base; 201. hinge arm; 202. hinge seat; 2021. limit portion; 2022. long hole; 203. first connecting pin; 204. adjusting screw; 3. damper; 301. cylinder body; 3011. second hook; 302. piston; 303. piston rod; 304. first spring; 305. second spring; 306. first hook; 4. connecting arm; 401. U-shaped pin; 5. power arm; 501. connecting rod; 502. second connecting pin; 6. swing block; 601. third connecting pin. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the present application can be understood intuitively and vividly, but it cannot be understood as a limitation on the scope of protection of the present application.

[0029] In the description of this application, if there is a description of orientation, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0030] In the description of this application, if "several" is involved, it means one or more, if "multiple" is involved, it means more than two, if "greater than", "less than", "exceed", they should be understood as not including the number, if "above", "below", "within" are involved, they should be understood as including the number. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In addition, unless otherwise defined, the technical terms and scientific terms used in this application are the same as those generally understood by those skilled in the art. The terms used in this application are only for describing specific embodiments, not for limiting this application. It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0032] Example: Figure 1 -*As shown, a damping rebound hinge comprises a hinge cup 1, a base 2, a damper 3, a connecting arm 4 and a power arm 5 hinged between the hinge cup 1 and the base 2, and a swing block 6 hinged in the base 2. The damper 3 comprises a cylinder 301, a piston 302, a piston rod 302, a first spring 304, and a second spring 305. The piston 302 slides in the inner wall of the cylinder 301, one end of the piston rod 302 is connected to the piston 302, and the other end of the piston rod 302 is assembled with one end of the swing block 6, and the other end of the swing block 6 is hinged with an end of the power arm 5 away from the hinge cup 1. The first spring 304 is sleeved outside the piston rod 302, and the first spring 304 is located between the top wall of the cylinder 301 and the top wall of the piston 302. The two ends of the second spring 305 are respectively abutted against the bottom wall of the piston 302 and the top wall of the cylinder 301. The elastic force of the second spring 305 is greater than the elastic force of the first spring 304. By designing the elastic force of the first spring 304 and the second spring 305 of the buffer, the elastic force of the second spring 305 overcomes the elastic force of the first spring 304, so that the hinge is in a normally open state. There is no need to adopt the torsion spring and cross pin structure in the prior art to achieve the effect of the rebound hinge, simplify the parts of the rebound hinge, and reduce the production and assembly costs of the rebound hinge. Due to the reduction in parts, the assembly process is simpler and the assembly efficiency is improved. Secondly, the number of mechanical parts is reduced, the potential failure points are reduced, and the reliability of the product is improved. Furthermore, the design of the damper 3 can smoothly control the closing speed of the door panel, prevent rapid rebound, improve safety of use, effectively reduce the impact and noise when the door panel is closed, enhance the user experience, and meet market demand.

[0033] The cylinder body 301 is filled with hydraulic oil, the piston 302 is provided with an oil delivery hole and the inner wall of the cylinder body 301 is provided with an oil delivery groove. The movement of the piston 302 squeezes the hydraulic oil to flow, thereby further improving the buffering effect.

[0034] In terms of the structural design of the first spring 304 and the second, the wire diameter of the second torsion spring is 0.7-1.0 mm, preferably, the wire diameter of the second spring 305 is 0.7 mm, the wire diameter of the first spring 304 is 0.3-0.5 mm, preferably, the wire diameter of the first spring 304 is 0.4 mm. It is worth mentioning that the first spring 304 and the second spring 305 are made of the same material. According to Hooke's law, the elastic force F of the spring is proportional to its elongation x, that is, F=kx, where k is the spring coefficient, and the spring coefficient is related to the elastic modulus, wire diameter, median diameter, and total number of turns of the material. Of course, in practical applications, the elastic force difference between the first spring 304 and the second spring 305 can be changed by adjusting the middle diameter and the total number of turns, so that the elastic force of the second spring 305 is greater than the elastic force of the first spring 304. Under the action of the first spring 304 and the hydraulic buffer of the damper 3, the buffering effect of the rebound hinge opening is achieved, so that the door panel opens slowly. Under the action of the second spring 305, the buffering effect of the rebound hinge closing is achieved, so that the door panel closes slowly.

[0035] In actual use, when a rebounder with a buffering effect is used, the hinge for connecting the door panel and the side panel usually adopts an ordinary non-damping hinge to avoid the damping mismatch between the rebounder and the hinge, which affects the opening and closing effect of the door panel. In the prior art, two types of hinges need to be equipped to cope with different rebounders, namely, damped rebound hinges and powerless hinges. This not only increases the inventory volume and increases the difficulty of inventory, but also affects the final use effect if the corresponding hinge is installed incorrectly. Therefore, in order to solve the above technical problems, the damper 3 also includes a first hook 306, one end of the first hook 306 is connected to the piston rod 302, and the other end of the first hook 306 is clamped and assembled with the swing block 6. The first hook 306 is clamped and assembled with the swing block 6. When the damped rebound hinge is needed, the first hook 306 is clamped with the swing block 6, thereby realizing the connection between the damper 3 and the swing block 6. In the process of opening and closing the hinge, the force of the power arm 5 is transmitted through the swing block 6. The power arm 5 is directly pressed against the cam 320 , and the spring 320 is in a state of being pushed against the cam 321 , so that the power arm 5 can be pushed against the cam 320 .

[0036] In terms of the specific structure of the assembly of the damper 3 and the base 2, the base 2 includes a hinge arm 201 for being hinged to the connecting arm 4 and a hinge seat 202 for being assembled with the side panel. The hinge seat 202 is assembled with the hinge arm 201, and the cylinder body 301 is assembled in the hinge seat 202. The inner side wall of the hinge seat 202 has a protruding limit portion 2021, and the limit portions 2021 are correspondingly arranged on both radial sides of the cylinder body 301. By providing the limit portion 2021 and the cylinder body 301 for clamping assembly, the stability of the assembly of the damper 3 is improved. At the same time, it is convenient to disassemble and assemble the damper 3, thereby realizing the switching between the damping rebound hinge and the powerless hinge.

[0037] In terms of the specific structure of the assembly of the hinge seat 202 and the hinge arm 201, the present embodiment further includes a first connecting pin 203 and an adjusting screw 204. The side wall of the hinge seat 202 is provided with a long hole 2022. The first connecting pin 203 is inserted into the long hole 2022, and both ends of the first connecting pin 203 are connected to the side walls of the hinge arm 201. The adjusting screw 204 is connected to the top wall of the hinge arm 201 and the top wall of the hinge seat 202, and is used to adjust the relative position of the hinge seat 202 and the hinge arm 201. The adjusting screw 204 includes a vertical adjustment screw and a longitudinal adjustment screw. The vertical adjustment screw is threadedly assembled with the hinge arm 201, and one end of the vertical adjustment screw is connected to the top wall of the hinge seat 202. By rotating the vertical adjustment screw, the hinge seat 202 moves back and forth toward the inner top wall of the hinge arm 201. The top wall of the hinge arm 201 is provided with a long sliding hole, and the longitudinal adjustment screw is passed through the sliding hole and connected with the top wall screw of the hinge seat 202. By loosening the longitudinal adjustment screw, the hinge seat 202 and the hinge arm 201 can slide longitudinally, and the longitudinal distance between the two groups is adjusted. By tightening the longitudinal adjustment screw, the adjusted position is fixed, thereby improving the compatibility of the damping rebound hinge assembly and improving the stability and reliability of the damping rebound effect of the hinge. Secondly, since the hinge seat 202 is provided with a limiting portion 2021, during the longitudinal movement of the hinge seat 202, the limiting portion 2021 moves along the outer ring wall of the cylinder body 301 of the damper 3, which limits the movement of the hinge seat 202 and makes the hinge seat 202 move along the axis of the cylinder body 301 of the damper 3.

[0038] The second hook 3011 is provided on the cylinder body 301 for clamping the first connecting pin 203, and the second hook 3011 is provided with a protrusion extending from the bottom wall of the cylinder body 301 toward the outer ring wall of the first connecting pin 203. The bottom wall of the cylinder body 301, that is, the end wall of the cylinder body 301 away from the piston rod 302, is provided with a second hook 3011, and the cylinder body 301 of the damper 3 is clamped and assembled with the base 2. When the damping rebound hinge is needed, the first hook 306 is clamped with the swing block, and the second hook 3011 is clamped with the first connecting pin 203, so as to realize the connection between the damper 3 and the swing block and the base 2. In the process of opening and closing the hinge, the force of the power arm 5 is transmitted to the damper 3 through the swing block, and the first connecting pin 203 limits the cylinder body 301 of the damper 3, and the force is transmitted through the first spring 304, the second spring 304 and the second connecting pin 203. The second spring 305 and hydraulic pressure are used for buffering, thereby achieving a damping and buffering effect. When a power-free hinge is needed, the first hook 306 and the swing block are disengaged and disassembled, and the second hook 3011 and the first connecting pin 203 are disengaged and disassembled, thereby disconnecting the damper 3 from the swing block 6 and the base 2. During the opening and closing of the hinge, the damper 3 does not provide damping and buffering to the power arm 5, thereby achieving the effect of a power-free hinge. Secondly, when the buffering effect of the damper 3 declines with the increase in the frequency of use, its buffering effect can be restored by replacing the damper 3. The damper 3 is connected in a card-connected manner, which is easy to plug in. Compared with the prior art, the structure of the torsion spring and the damper 3 cannot be replaced when the torsion force of the torsion spring is weakened, and the hinge needs to be replaced as a whole, thereby increasing the replacement cost. Therefore, the damping rebound hinge reduces the maintenance cost during use.

[0039] In order to further reduce the difficulty of disassembling and assembling the damper 3, the opening directions of the first hook 306 and the second hook 3011 are the same. When one end of the damper 3 is engaged with the swing block 6 and the other end of the damper 3 is engaged with the first connecting pin 203, the opening of the first hook 306 and the opening of the second hook 3011 are both facing the top wall of the hinge arm 201. The opening directions of the first hook 306 and the second hook 3011 are the same, which facilitates the disassembly and assembly of the damper 3, reduces the speed of switching between the damped rebound hinge and the powerless hinge, and reduces the difficulty of switching. When the damper 3 is installed, the side plate is connected to the hinge seat 202 to limit the cylinder body 301 of the damper 3, and the opening of the first hook 306 and the opening of the second hook 3011 are both facing the top wall of the hinge arm 201, preventing the damper 3 from shifting and detaching during use, thereby improving the reliability of the damped rebound hinge.

[0040] In terms of the assembly structure of the power arm 5, this example also includes a U-shaped pin 401 and a second connecting pin 502. One end of the U-shaped pin 401 is used to hinge the connecting arm 4 to the hinge cup 1, one end of the U-shaped pin 401 is used to hinge one end of the power arm 5 to the hinge cup 1, and the second connecting pin 502 is used to hinge the other end of the power arm 5 to the hinge arm 201. Through the design of the damper 3, the damping rebound hinge does not need to use a torsion spring. At the same time, there is no need to open an opening on the connecting arm 4 for assembling the cross pin, which simplifies the structure of the power arm 5 and reduces the processing difficulty of the power arm 5. In addition, the number of openings in the power arm 5 is reduced, the structural rigidity of the power arm 5 is improved, and the direction of the force deformation of the power arm 5 is reduced during the opening and closing of the hinge.

[0041] In terms of the specific structure of the assembly of the power arm 5 and the swing block 6, the present embodiment also includes a third connecting pin 601, and a connecting rod 501 is hinged at one end of the power arm 5 close to the second connecting pin 502, and the other end of the connecting rod 501 is hinged to the swing block 6. The third connecting pin 601 is used to hinge the swing block 6 to the hinge arm 201, and the hinge between the connecting rod 501 and the swing block 6 is located above the third connecting pin 601, and the hinge between the damper 3 and the swing block 6 is located below the third connecting pin 601. The swing of the swing block 6 and the connecting rod 501 realizes the transmission of the force between the power arm 5 and the damper 3, thereby achieving a damping rebound effect.

[0042] The hinge center of the connecting rod 501 and the swing block 6 is point A, the hinge center of the damper 3 and the swing block 6 is point B, the center of the third connecting pin 601 is point O, |AO|:|BO|=(7-8):10, and the swing block swings with the third connecting pin 601 as a fulcrum. It is worth mentioning that in mathematics, the double vertical line symbol is usually used to represent the straight-line distance between two points, that is, |AO| represents the straight-line distance between point A and point O, and |BO| represents the straight-line distance between point B and point O.

[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A damping rebound hinge, characterized in that: It includes a hinge cup, a base, a damper, a connecting arm and a power arm hinged between the hinge cup and the base, and a swing block hinged in the base. The damper includes a cylinder body, a piston, a piston rod, a first spring, and a second spring. The piston slides in the inner wall of the cylinder body, one end of the piston rod is connected to the piston, and the other end of the piston rod is assembled with one end of the swing block. The other end of the swing block is hinged to an end of the power arm away from the hinge cup. The first spring is sleeved outside the piston rod, and the first spring is located between the top wall of the cylinder body and the top wall of the piston. The two ends of the second spring are respectively abutted against the bottom wall of the piston and the top wall of the cylinder body, and the elastic force of the second spring is greater than the elastic force of the first spring.

2. A damping rebound hinge according to claim 1, characterized in that: The damper further comprises a first hook, one end of which is connected to the piston rod, and the other end of which is engaged and assembled with the swing block.

3. A damping rebound hinge according to claim 2, characterized in that: The base includes a hinge arm for being hinged to the connecting arm and a hinge seat for being assembled with the side plate. The hinge seat is assembled with the hinge arm, and the cylinder body is assembled in the hinge seat. The inner side wall of the hinge seat has a protruding limiting portion, and the limiting portion is correspondingly arranged on both radial sides of the cylinder body.

4. A damping rebound hinge according to claim 3, characterized in that: It also includes a first connecting pin and an adjusting screw. The side wall of the hinge seat is provided with a long hole. The first connecting pin is passed through the long hole, and both ends of the first connecting pin are connected to the side wall of the hinge arm. The adjusting screw is connected to the hinge arm and the hinge seat and is used to adjust the relative position of the hinge seat and the hinge arm.

5. A damping rebound hinge according to claim 4, characterized in that: The cylinder body is provided with a second hook for engaging with the first connecting pin, and the second hook is protruded and extended from the bottom wall of the cylinder body toward the outer ring wall of the first connecting pin.

6. A damping rebound hinge according to claim 5, characterized in that: The opening directions of the first hook and the second hook are the same. When one end of the damper is engaged with the swing block and the other end of the damper is engaged with the first connecting pin, the opening of the first hook and the opening of the second hook are both facing the top wall of the hinge arm.

7. The damping rebound hinge according to claim 3, characterized in that: It also includes a U-shaped pin and a second connecting pin, one end of the U-shaped pin is used to hinge the connecting arm to the hinge cup, one end of the U-shaped pin is used to hinge one end of the power arm to the hinge cup, and the second connecting pin is used to hinge the other end of the power arm to the hinge arm.

8. A damping rebound hinge according to claim 7, characterized in that: It also includes a third connecting pin, and a connecting rod is hinged at one end of the power arm close to the second connecting pin, and the other end of the connecting rod is hinged to the swing block. The third connecting pin is used to hinge the swing block to the hinge arm, and the hinge point between the connecting rod and the swing block is located above the third connecting pin, and the hinge point between the damper and the swing block is located below the third connecting pin.

9. A damping rebound hinge according to claim 8, characterized in that: The hinge center of the connecting rod and the swing block is point A, the hinge center of the damper and the swing block is point B, the center of the third connecting pin is point O, |AO|:|BO|=(7~8):

10.

10. A damping rebound hinge according to any one of claims 1 to 9, characterized in that: The wire diameter of the second torsion spring is 0.7-1.0 mm.

Images