A hinge assembly

Abstract

The utility model relates to a hinge assembly for furniture, including hinge arm, hinge cup, first link, second link and damper, hinge arm is used for installing on first component, hinge cup is used for installing on second component, first link is linked with hinge cup and hinge arm rotation respectively, second link is linked with hinge cup and hinge arm rotation respectively, damper includes cylinder body, piston, piston rod and elastic part, is equipped with inner chamber in cylinder body, the piston is located in inner chamber, and piston can be active along the front and back direction, the rear end of piston rod is connected with piston, and its front end is located outside cylinder body, the elastic part is located in inner chamber and is connected piston and cylinder body respectively, and the elastic part is used to exert the elastic force to piston, cylinder body is connected with hinge arm rotation, and piston rod is connected with first link or second link rotation.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and in particular to a hinge assembly for furniture. Background Technology

[0002] A hinge, also known as a door hinge, is a mechanical device used to connect two parts and allow them to rotate relative to each other. It is widely used in connecting cabinet doors and cabinet bodies. Hinges are mainly installed on doors and windows, especially cabinet and furniture doors. Classified by material, they are mainly divided into stainless steel hinges and iron hinges. To provide a better user experience, damping hinges (also known as buffer hinges) have been developed. Damping hinges have internal or external damping devices, which provide a buffering function when the cabinet door closes, minimizing the noise generated by the door colliding with the cabinet body.

[0003] For example, the Chinese patent publication number CN204728877U discloses "A Damping Buffer Hinge", which includes a door box fixing seat and a hinge arm. The door box fixing seat and the hinge arm are connected through an external connector and an internal connector. The piston rod of the damper is connected to the internal connector. In this way, when the door box fixing seat switches from the open state to the closed state, the damper can play a buffering role, minimizing the noise generated by the collision between the cabinet door and the cabinet body when the door is closed. However, to ensure smoother relative movement between the linkage components, unavoidable gaps exist between them, such as the gap between the damper and the inner connector, and the gap between the damper and the hinge arm. Furthermore, as disclosed in Chinese Patent Publication No. CN202913833U, "A Damping Buffer Hinge," a drive swing block is also provided between the inner connector and the damper. Gaps also exist between the drive swing block and the inner connector, and between the drive swing block and the damper. These gaps prevent the damper from moving synchronously with the door box fixing seat as it transitions from a closed state to a small-angle unfolded state. Consequently, the door box fixing seat fails to provide a buffering effect when switching from a small-angle unfolded state to a closed state. Figure 1To further illustrate, taking the movable gap between the damper 100 and the inner connector 200 as an example, when the door box fixing seat switches from the unfolded state to the retracted state, the positional relationship of the connection parts of the damper 100 and the inner connector 200 is shown in (a). However, when the door box fixing seat switches from the retracted state to the unfolded state, the positional relationship of the connection parts of the damper 100 and the inner connector 200 must be switched to the positional relationship shown in (b) before the piston rod of the damper 100 can start to move. During the switching process from (a) to (b), the damper 100 cannot move in time with the movement of the door box fixing seat. As a result, after the door box fixing seat is unfolded at small angles such as 5°, 10°, and 15° (the angle here is based on the accuracy of different hinges and is not particularly limited), the piston rod of the damper 100 cannot move in time, so the door box fixing seat cannot play a buffering role when switching from the small-angle unfolded state to the retracted state, resulting in a large noise when the cabinet door is closed. Utility Model Content

[0004] To address the problem that existing hinges fail to provide a buffering effect when switching from a small-angle open state to a closed state due to the gaps between the linkage components, this utility model provides a hinge assembly.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A hinge assembly, comprising:

[0007] A hinge arm, which is used for mounting on the first component;

[0008] Hinge cup, used for mounting on the second component;

[0009] The first linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm.

[0010] The second linkage member has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm; and

[0011] A damper includes a cylinder, a piston, a piston rod, and an elastic element. The cylinder has an inner chamber, the piston is located within the inner chamber and is movable in a forward-backward direction, the rear end of the piston rod is connected to the piston, and its front end is located outside the cylinder. The elastic element is located in the inner chamber and is connected to both the piston and the cylinder, and is used to apply a forward elastic force to the piston. The cylinder is rotatably connected to the hinge arm, and the piston rod is rotatably connected to either the first or second linkage.

[0012] Compared with the prior art, the hinge assembly of this utility model has the following advantages:

[0013] The hinge cup is automatically closed by using an elastic element inside the damper instead of the torsion spring of the traditional hinge. In this way, when the hinge cup is in the open and closed state, the connection between the linkage and the damper, and the connection between the damper and the cylinder, always remain in the same state and are not affected by the fit gap between the linkage components. This achieves a buffering effect when the hinge cup switches from the small angle open state to the closed state, thereby reducing the noise when the cabinet door closes.

[0014] In some embodiments, the elastic element is a compression spring. When the hinge cup switches from the extended state to the closed state, the compression spring can push the piston forward to make the hinge cup rotate until it is fully switched to the closed state.

[0015] Furthermore, an annular groove is formed at the rear end of the piston, and the end of the elastic element is disposed within the annular groove.

[0016] Furthermore, the rear end wall of the inner cavity is provided with a protruding positioning part, and the end of the elastic member is sleeved on the positioning part.

[0017] The two ends of the compression spring are positioned by an annular groove and a positioning part, thereby improving the stability of the compression spring.

[0018] In some embodiments, the front end of the cylinder is provided with a first seal, which is used to seal the gap between the piston rod and the cylinder.

[0019] Furthermore, the rear end of the first seal has a deformable portion formed on its outer periphery, and the outer peripheral wall of the deformable portion is in contact with the side wall of the inner cavity. When the piston moves from rear to front, the piston applies pressure to the first seal through the medium, thereby causing the deformable portion to tend to expand outward, further improving the sealing performance of the first seal and preventing the medium in the inner cavity from leaking out.

[0020] In some embodiments, the piston divides the inner chamber into a first chamber and a second chamber; the piston includes a main body and a second seal, the main body being provided with an oil return channel; when the main body moves from back to front, the second seal can limit the speed at which the medium in the first chamber flows into the second chamber along the oil return channel, thereby reducing the piston's movement speed and achieving the rotational speed when the hinge cup switches to the closed state.

[0021] Furthermore, the outer side of the main body is provided with a recessed receiving portion, and the oil return channel includes a first hole, a second hole, and a third hole that axially penetrate the piston. The first hole and the second hole are distributed on both sides of the receiving portion, and the first hole communicates with the first chamber, the second hole communicates with the second chamber, and the third hole is formed on the side wall of the receiving portion. The first hole and the third hole are directly connected, and the second hole and the third hole are connected through the receiving portion.

[0022] The second seal is a rubber ring, which is movably disposed within the accommodating portion. When the piston moves from back to front, the second seal can form a barrier between the second hole and the third hole to reduce the speed at which the medium in the third hole flows into the second hole.

[0023] Furthermore, the oil return channel is provided with 2-6 channels. Providing multiple oil return channels can prevent a blockage in one oil return channel from affecting the normal movement of the piston. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing two engagement states of the connecting element and damper in an existing hinge.

[0025] Figure 2 This is a schematic diagram of the hinge assembly involved in this utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of the hinge assembly involved in this utility model;

[0027] Figure 4 This is a cross-sectional schematic diagram of the damper in the hinge assembly involved in this utility model;

[0028] Figure 5 This is a schematic diagram of the piston structure in the hinge assembly involved in this utility model;

[0029] Figure 6 This is a first-view structural schematic diagram of the main body of the hinge assembly involved in this utility model;

[0030] Figure 7 This is a structural schematic diagram of the main body of the hinge assembly involved in this utility model from a second perspective.

[0031] Figure label:

[0032] 1. Hinge arm; 2. Hinge cup; 3. First linkage; 4. Second linkage; 5. Damper; 6. Base;

[0033] 51. Cylinder body; 511. Positioning part; 512. First chamber; 513. Second chamber; 52. Piston; 521. Annular groove; 522. Main body; 5221. Receiving part; 523. Second seal; 524. Oil return passage; 5241. First hole; 5242. Second hole; 5243. Third hole; 53. Piston rod; 54. Elastic element; 55. First seal; 551. Deformation part. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component at the same time; when a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component at the same time.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of the embodiments of this utility model, it should be understood that the orientation or positional relationship indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings and is only for the convenience of describing the embodiments of this utility model and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] To address the problem that existing hinges cannot provide a buffering effect when switching from a small-angle open state to a closed state due to the play between the linkage components, this utility model provides a hinge assembly, including a hinge arm 1, a hinge cup 2, a first linkage 3, a second linkage 4, and a damper 5.

[0039] Hinge arm 1 is used for mounting on the first component;

[0040] Hinge cup 2 is used for mounting on the second component;

[0041] One end of the first linkage 3 is rotatably connected to the hinge cup 2, and the other end of the first linkage 3 is rotatably connected to the hinge arm 1.

[0042] One end of the second linkage 4 is rotatably connected to the hinge cup 2, and the other end of the second linkage 4 is rotatably connected to the hinge arm 1.

[0043] The damper 5 includes a cylinder 51, a piston 52, a piston rod 53, and an elastic element 54. The cylinder 51 has an inner chamber, the piston 52 is located in the inner chamber and can move in the front-back direction. The rear end of the piston rod 53 is connected to the piston 52, and its front end is located outside the cylinder 51. The elastic element 54 is located in the inner chamber and is connected to the piston 52 and the cylinder 51 respectively. The elastic element 54 is used to apply a forward elastic force to the piston 52. The cylinder 51 is rotatably connected to the hinge arm 1, and the piston rod 53 is rotatably connected to the first linkage 3 or the second linkage 4.

[0044] The hinge cup 2 of this invention can switch between an extended state and a retracted state. When the hinge cup 2 switches from the retracted state to a small-angle extended state, the connection between the linkage (first linkage 3 or second linkage 4) and the damper 5, and the connection between the damper 5 and the cylinder 51, remain in the same state, unaffected by the clearance between the linkage components. This achieves a buffering effect when the hinge cup 2 switches from a small-angle extended state to a retracted state, reducing noise when the cabinet door closes. Specifically, taking the connection between the linkage and the damper 5 as an example, when the hinge cup 2 switches from the retracted state to a small-angle extended state, the positional relationship between the linkage and the damper 5 is as follows: Figure 1 As shown in (b), the connecting shaft of the linkage abuts against the rear end of the connecting hole of the piston rod 53. At this time, if the control force applied to the hinge cup 2 is removed, the elastic element 54 will drive the piston 52 forward, causing the piston rod 53 to push the linkage forward, thereby achieving automatic buffering and closing of the hinge cup 2. Throughout the process, the connecting shaft of the linkage and the rear end of the connecting hole of the piston rod 53 remain in contact, meaning that the buffering and closing of the hinge cup 2 is not affected by the clearance between the connecting shaft of the linkage and the connecting hole of the piston rod 53. The clearance between the damper 5 and the cylinder 51 is similar and will not be elaborated here.

[0045] In some embodiments, the elastic element 54 is a compression spring located behind the piston 52. When the hinge cup 2 switches from the extended state to the retracted state, the compression spring can push the piston 52 forward to make the hinge cup 2 rotate until it is fully switched to the retracted state.

[0046] Furthermore, an annular groove 521 is formed at the rear end of the piston 52, and the end of the elastic member 54 is disposed within the annular groove 521; a positioning part 511 is formed by a protrusion on the rear end wall of the inner cavity, and the end of the elastic member 54 is sleeved on the positioning part 511. The two ends of the compression spring are positioned by the annular groove 521 and the positioning part 511, thereby improving the stability of the compression spring.

[0047] In some embodiments, the elastic element 54 is a tension spring located in front of the piston 52. When the hinge cup 2 switches from the extended state to the retracted state, the tension spring can pull the piston 52 forward to make the hinge cup 2 rotate until it is fully switched to the retracted state.

[0048] In some embodiments, a first seal 55 is provided at the front end of the cylinder 51. The first seal 55 is used to seal the gap between the piston rod 53 and the cylinder 51, thereby preventing the leakage of the medium (gas or liquid) in the inner chamber.

[0049] Furthermore, a deformable portion 551 is formed on the outer periphery of the rear end of the first seal 55, and the outer peripheral wall of the deformable portion 551 is in contact with the side wall of the inner cavity. When the piston 52 moves from rear to front, the piston 52 applies pressure to the first seal 55 through the medium. Under the action of this pressure, the deformable portion 551 can tend to expand outward, so that the first seal 55 is further pressed against the side wall of the inner cavity, thereby improving the sealing effect of the first seal 55.

[0050] In some embodiments, the piston 52 divides the inner chamber into a first chamber 512 and a second chamber 513; the piston 52 includes a main body 522 and a second seal 523, and the main body 522 is provided with an oil return channel 524; when the main body 522 moves from back to front, the second seal 523 can limit the speed at which the medium in the first chamber 512 flows along the oil return channel 524 into the second chamber 513, thereby reducing the movement speed of the piston 52 and realizing the rotation speed when the hinge cup 2 switches to the closed state.

[0051] Furthermore, the outer side of the main body 522 is provided with a recessed receiving portion 5221. The oil return channel 524 includes a first hole 5241, a second hole 5242, and a third hole 5243 that axially penetrate the piston 52. The first hole 5241 and the second hole 5242 are distributed on both sides of the receiving portion 5221. The first hole 5241 communicates with the first chamber 512, the second hole 5242 communicates with the second chamber 513, and the third hole 5243 is formed on the side wall of the receiving portion 5221. The first hole 5241 and the third hole 5243 are directly connected, and the second hole 5242 and the third hole 5243 are connected through the receiving portion 5221. The second seal 523 is a rubber ring, and the second seal 523 is movably disposed in the receiving portion 5221. When the hinge cup 2 switches from the closed state to the unfolded state, the hinge cup 2... The piston rod 53 is driven to move from front to back by the linkage. At this time, the rubber ring abuts against the front wall of the accommodating part 5221. The medium in the second chamber 513 can flow rapidly into the first chamber 512 through the second hole 5242, the accommodating part 5221, the third hole 5243 and the first hole 5241 in sequence, so that the piston 52 can move smoothly and the hinge cup 2 can be opened easily. When the hinge cup 2 switches from the unfolded state to the closed state, the hinge cup 2 drives the piston rod 53 to move from back to front by the linkage. At this time, the rubber ring abuts against the rear wall of the accommodating part 5221, thereby forming a barrier between the second hole 5242 and the third hole 5243. In this way, the speed at which the medium in the third hole 5243 flows into the second hole 5242 is slowed down, and the movement speed of the piston 52 is relatively slow, thereby realizing the buffered closing of the hinge cup 2.

[0052] Furthermore, there are 2 to 6 oil return channels 524. Setting multiple oil return channels 524 can prevent a blockage in one oil return channel 524 from affecting the normal movement of the piston 52.

[0053] In some embodiments, a base 6 is detachably mounted on the bottom of the hinge arm 1, and a mounting seat is detachably mounted on the bottom of the base 6. After the mounting seat is mounted on the base 6, the installation position between the cabinet door and the cabinet body can be changed. Through the cooperation of the mounting parts, different hinges can be adapted to cabinets of different specifications to meet different installation requirements.

[0054] The above description is only a preferred embodiment of the present utility model, and its structure is not limited to the shapes listed above. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hinge assembly, characterized in that, include: A hinge arm, which is used for mounting on the first component; Hinge cup, used for mounting on the second component; The first linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm. The second linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm. and A damper includes a cylinder, a piston, a piston rod, and an elastic element. The cylinder has an inner chamber, the piston is located within the inner chamber and is movable in a forward-backward direction, the rear end of the piston rod is connected to the piston, and its front end is located outside the cylinder. The elastic element is located in the inner chamber and is connected to both the piston and the cylinder, and is used to apply a forward elastic force to the piston. The cylinder is rotatably connected to the hinge arm, and the piston rod is rotatably connected to either the first or second linkage.

2. The hinge assembly as described in claim 1, characterized in that, The elastic element is a compression spring.

3. The hinge assembly as described in claim 2, characterized in that, The piston has an annular groove at its rear end, and the end of the elastic element is located within the annular groove.

4. A hinge assembly as described in claim 2, characterized in that, The rear end wall of the inner cavity is provided with a protruding positioning part, and the end of the elastic element is sleeved on the positioning part.

5. A hinge assembly as described in claim 1, characterized in that, The cylinder body has a first sealing element at its front end, which is used to seal the gap between the piston rod and the cylinder body.

6. A hinge assembly as described in claim 5, characterized in that, The rear end of the first seal has a deformable portion formed on its outer periphery, and the outer peripheral wall of the deformable portion is in contact with the side wall of the inner cavity.

7. A hinge assembly as described in claim 1, characterized in that, The piston divides the inner chamber into a first chamber and a second chamber; the piston includes a main body and a second seal, the main body being provided with an oil return channel; when the main body moves from back to front, the second seal can limit the speed at which the medium in the first chamber flows into the second chamber along the oil return channel.

8. A hinge assembly as described in claim 7, characterized in that, The outer side of the main body is provided with a recessed receiving portion. The oil return channel includes a first hole, a second hole, and a third hole that axially penetrate the piston. The first hole and the second hole are distributed on both sides of the receiving portion. The first hole communicates with the first chamber, the second hole communicates with the second chamber, and the third hole is formed on the side wall of the receiving portion. The first hole and the third hole are directly connected, and the second hole and the third hole are connected through the receiving portion. The second seal is a rubber ring, which is movably disposed within the accommodating portion. When the piston moves from back to front, the second seal can form a barrier between the second hole and the third hole to reduce the speed at which the medium in the third hole flows into the second hole.

9. A hinge assembly as described in claim 7 or 8, characterized in that, The oil return channel has 2-6 channels.

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