Upturning door hinge with door opening and closing buffering function

Abstract

An upturning door hinge with a door opening and closing buffering function comprises a base fixed in a cabinet body and a door seat fixed on a cabinet door, a first hinge arm and a second hinge arm are installed in the base in a hinged mode, and the second hinge arm is hinged to the door seat through a third hinge arm and a fourth hinge arm. A four-bar mechanism is formed among the second hinge arm, the third hinge arm, the fourth hinge arm and the gate seat, and the hinge arms move relatively, so that relative displacement between the gate seat and the base is realized; the other end of the first hinge arm is hinged to the middle of the third hinge arm, a door closing buffer is installed in the second hinge arm, the door closing buffer extends into a movable path of the fourth hinge arm, and when the hinge is closed, the door closing buffer and the fourth hinge arm extrude to slow down the door closing speed; a door opening buffer is installed in the fourth hinge arm and extends into the moving path of the third hinge arm, and when the hinge is opened, the door opening buffer and the third hinge arm are squeezed to slow down the door opening speed.

Description

Technical Field

[0001] The utility model relates to a hardware hinge, in particular to an upturned door hinge with a door opening and closing buffering function. Background Art

[0002] In modern home design, demand for cabinets with flip doors, particularly those with top-loading doors, is increasing to improve ease of use and safety. However, top-loading doors are prone to sudden closing or opening during the opening and closing process, which can cause damage to the door, generate noise, and even cause accidental injury to the user. Therefore, many top-loading door hinges are designed with a buffer function to slow down the opening and closing speed. However, most top-loading door hinges with buffer functions currently on the market still have many shortcomings, mainly reflected in the following aspects:

[0003] 1. Existing hinges for flip doors often only offer one-way damping, providing damping in only one direction during the door opening or closing process. This design fails to meet users' requirements for bidirectional damping, resulting in potential for sudden acceleration or deceleration during the opening and closing process, causing inconvenience. Due to a lack of precise damping control, existing hinges typically only activate when the door opens to a certain angle, failing to maintain consistent damping throughout the entire process, affecting the continuity and stability of the damping.

[0004] 2. Some existing buffer hinge designs require complex buffer components, such as hydraulic dampers or pneumatic buffers, to be installed inside the door or cabinet. These components are often large and complex, increasing the overall size of the hinge and making installation and maintenance more difficult. The complex structural design also requires specialized positioning and installation tools during assembly, increasing the operational burden on users and installers.

[0005] 3. Existing buffer devices are prone to wear and tear during frequent opening and closing. In particular, the seals and cushions of hydraulic dampers are prone to wear and leakage, which can gradually weaken or even render the buffering effect ineffective. Due to the lack of protection of the buffer components, their service life is often short, requiring frequent replacement and maintenance, which increases future operating costs. Therefore, further improvements are necessary. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a flip door hinge with a door opening and closing buffering function, which is simple in structure, easy to use, and can effectively improve the buffering effect, making the hinge more stable when opening and closing.

[0007] The purpose of the utility model is achieved in the following way: a flip door hinge with a door opening and closing buffering function, which includes a base fixed in a cabinet body and a door seat fixed on the cabinet door, a first hinge arm and a second hinge arm are hingedly installed in the base, and the second hinge arm is hinged to the door seat through a third hinge arm and a fourth hinge arm;

[0008] A four-bar linkage is formed between the second hinge arm, the third hinge arm and the fourth hinge arm and the door seat, and the hinge arms move relative to each other to achieve relative displacement between the door seat and the base;

[0009] The other end of the first hinge arm is hinged to the middle of the third hinge arm, and a door closing buffer is installed in the second hinge arm. The door closing buffer extends into the movable path of the fourth hinge arm. When the hinge is closed, the door closing buffer squeezes the fourth hinge arm to slow down the closing speed.

[0010] A door opening buffer is installed in the fourth hinge arm and extends into the movable path of the third hinge arm. When the hinge is opened, the door opening buffer is squeezed by the third hinge arm to slow down the door opening speed.

[0011] Furthermore: the door closing buffer is a hydraulic damper, a door closing guide sleeve is fixedly installed in the second hinge arm, and the door closing buffer is inserted into the door closing guide sleeve.

[0012] Furthermore: the door opening buffer is a hydraulic damper, a door opening guide sleeve is fixedly installed in the fourth hinge arm, and the door opening buffer is inserted into the door opening guide sleeve.

[0013] Furthermore, the front and rear ends of the door closing guide sleeve are respectively provided with a first mounting seat and a second mounting seat, and the first mounting seat and the second mounting seat are respectively connected to the hinges of the third hinge arm and the fourth hinge arm and the second hinge arm.

[0014] Furthermore: a limiting platform is provided in the second hinge arm, the piston rod portion of the door closing buffer is pressed in the limiting platform, an isolation sleeve is sheathed on the piston cylinder of the door closing buffer, and the isolation sleeve is in contact with the fourth hinge arm.

[0015] Furthermore: a first mounting hole and a second mounting hole are provided on the door opening guide sleeve, and a fixing screw passes through the fourth hinge arm and is connected to the first mounting hole and the second mounting hole.

[0016] Furthermore: a positioning pressing piece is also installed in the door opening guide sleeve, the piston rod part of the door opening buffer presses on the positioning pressing piece, and the piston cylinder part of the door opening buffer presses on the fourth hinge arm.

[0017] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0018] 2. This patented design of the flip door hinge incorporates both a closing buffer and an opening buffer, providing cushioning in both the opening and closing directions. This bidirectional buffering design prevents sudden acceleration or deceleration of the door, significantly improving safety and effectively preventing accidental collisions or rapid opening and closing.

[0019] 3. Both the closing and opening buffers are integrated into the hinge's internal structure. Through optimized design, the buffers are positioned within their corresponding motion paths, ensuring a stable buffering effect. Furthermore, the buffers are properly protected, reducing external friction and wear, thereby effectively extending their service life and lowering maintenance frequency and subsequent costs.

[0020] 4. By using hydraulic dampers as both closing and opening buffers, this utility model can adjust the buffering force according to actual needs, ensuring that the appropriate buffering effect can be achieved for both lightweight and heavy door panels, improving the adaptability of the hinge. The adjustable buffering effect makes it suitable for different application scenarios and increases user flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the hinge in the open state of the present invention.

[0022] Figure 2 This is a schematic diagram of the hinge closed state in the present invention.

[0023] Figure 3 This is a structural exploded view of the utility model.

[0024] Figure 4 This is a schematic diagram of the structure of the utility model after the shell is hidden.

[0025] Figure 5 This is a schematic diagram of the door closing buffer structure in the utility model.

[0026] Figure 6 This is an exploded view of the door closing buffer structure in the present utility model.

[0027] Figure 7 This is a schematic structural diagram of the door buffer in the utility model.

[0028] Figure 8 This is an exploded view of the structure of the middle-opening door buffer of the utility model. DETAILED DESCRIPTION

[0029] The present invention is further described below in detail with reference to the accompanying drawings. A flip door hinge with a door opening and closing buffering function comprises a base 1 fixed within a cabinet body, and a door seat 2 fixed to the cabinet door. A first hinge arm 3 and a second hinge arm 4 are hingedly mounted within the base 1. The second hinge arm 4 is hingedly connected to the door seat 2 via a third hinge arm 5 and a fourth hinge arm 6.

[0030] A four-bar linkage is formed between the second hinge arm 4, the third hinge arm 5 and the fourth hinge arm 6 and the door seat 2. The hinge arms move relative to each other to achieve relative displacement between the door seat 2 and the base 1.

[0031] The other end of the first hinge arm 3 is hinged to the middle of the third hinge arm 5, and is characterized in that:

[0032] A door closing buffer 44 is installed in the second hinge arm 4. The door closing buffer 44 extends into the movable path of the fourth hinge arm 6. When the hinge is closed, the door closing buffer 44 squeezes the fourth hinge arm 6 to slow down the closing speed.

[0033] A door opening buffer 61 is installed in the fourth hinge arm 6, and the door opening buffer 61 extends into the movable path of the third hinge arm 5. When the hinge is opened, the door opening buffer 61 is squeezed by the third hinge arm 5 to slow down the door opening speed.

[0034] In one embodiment, the door closing buffer 44 is a hydraulic damper, a door closing guide sleeve 45 is fixedly installed in the second hinge arm 4 , and the door closing buffer 44 is inserted into the door closing guide sleeve 45 .

[0035] In one embodiment, the door opening buffer 61 is a hydraulic damper, a door opening guide sleeve 62 is fixedly installed in the fourth hinge arm 6 , and the door opening buffer 61 is inserted into the door opening guide sleeve 62 .

[0036] In one embodiment, the front and rear ends of the door closing guide sleeve 45 are respectively provided with a first mounting seat 41 and a second mounting seat 42, and the first mounting seat 41 and the second mounting seat 42 are respectively connected to the hinges of the third hinge arm 5 and the fourth hinge arm 6 and the second hinge arm 4.

[0037] In one embodiment, a limiting platform 43 is provided inside the second hinge arm 4 , the piston rod portion of the door closing buffer 44 is pressed inside the limiting platform, and an isolation sleeve 46 is provided outside the piston cylinder of the door closing buffer 44 , and the isolation sleeve 46 is in contact with the fourth hinge arm 6 .

[0038] In one embodiment, a first mounting hole 63 and a second mounting hole 64 are provided on the door opening guide sleeve 62 , and a fixing screw passes through the fourth hinge arm 6 and is connected to the first mounting hole 63 and the second mounting hole 64 .

[0039] In one embodiment, a positioning pressing piece 65 is further installed in the door opening guide sleeve 62 , the piston rod portion of the door opening buffer 61 presses on the positioning pressing piece 65 , and the piston cylinder portion of the door opening buffer 61 presses on the fourth hinge arm 6 .

[0040] Working Principle: This hinge forms a four-bar linkage through the relative articulation of the base, door seat, first, second, third, and fourth hinge arms. This mechanism ensures relative movement between the door and cabinet, enabling smooth opening and closing of the flip door. During operation, the door moves smoothly along the linkage path, avoiding jamming or instability.

[0041] Among them, the design of the four-link mechanism enables the flip door to maintain smooth and continuous movement during the opening and closing process, avoiding shaking, enhancing the user experience, and reducing wear between the door body and the hinge, thereby extending the service life of the hinge.

[0042] Furthermore: This patent sets a door closing buffer and a door opening buffer in the second hinge arm and the fourth hinge arm respectively, thereby realizing a two-way buffer function for opening and closing:

[0043] The door closing buffer is installed inside the second hinge arm. When the door is about to close, the buffer enters the movable path of the fourth hinge arm and squeezes against it. This process creates a damping effect, slowing the door's closing speed and preventing it from closing quickly due to gravity.

[0044] The door opening buffer is installed inside the fourth hinge arm. When the door approaches its maximum opening angle, the buffer enters the path of the third hinge arm and squeezes against it, slowing the door's opening and preventing it from rapidly rising or losing control. The bidirectional buffer design ensures damped movement in both the opening and closing directions, preventing collisions and accidents caused by rapid opening and closing, significantly improving the safety of flip-up doors.

[0045] It should be noted that both the door opening and closing buffers of this patent use hydraulic dampers, and the hydraulic dampers are installed in specific guide sleeves so that the buffers can remain stable when in action. Of course, during production, the damping force of the hydraulic damper can be adjusted and matched according to actual application requirements to adapt to doors of different weights and materials. The adjustable buffering effect makes the hinge highly adaptable, not only suitable for lightweight door panels, but also able to meet the buffering needs of heavy door panels. Users can adjust according to different application scenarios, which improves the versatility and practicality of the hinge.

[0046] Furthermore, the patented design utilizes guide sleeves, mounting bases, and positioning plates for the mounting structures of the door closing and door opening buffers, creating a multi-point fixing structure. The piston rod of the door closing buffer presses against the stopper, while the piston cylinder sleeve has a spacer sleeve that contacts the fourth hinge arm. The piston rod of the door opening buffer presses against the positioning plate, further stabilizing the buffering effect during the door opening process.

[0047] The multi-point fixing design ensures that the buffer device is not easy to loosen or shift during use, enhancing the stability and durability of the structure and ensuring the stable output of the buffer effect. At the same time, this design also reduces the wear of the buffer device during high-frequency use, extending the service life of the buffer and hinge.

[0048] Furthermore, the hinge features a compact design, with the buffer and guide mechanisms housed within the hinge arm, saving space. The design of the buffer's guide sleeve, stopper, and positioning tab ensures easy installation, requiring no complex procedures or tools. This design not only makes the hinge highly compatible with various flip-door cabinets but also simplifies installation and maintenance, eliminating the need for frequent component replacement or adjustment during daily use, enhancing convenience and user experience.

[0049] To sum up, this patent not only achieves a smooth door opening and closing buffering effect through a unique four-bar linkage, two-way buffer design, hydraulic damping buffer, and multi-point fixing structure, but also ensures the stability of the structure and the convenience of installation, significantly improving the safety and durability of the flip door hinge.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A flip door hinge with a door opening and closing buffering function, comprising a base (1) fixed in a cabinet body, and a door seat (2) fixed on the cabinet door, wherein a first hinge arm (3) and a second hinge arm (4) are hingedly mounted in the base (1), and the second hinge arm (4) is hingedly connected to the door seat (2) via a third hinge arm (5) and a fourth hinge arm (6); A four-bar linkage is formed between the second hinge arm (4), the third hinge arm (5) and the fourth hinge arm (6) and the door seat (2), and the hinge arms move relative to each other to achieve relative displacement between the door seat (2) and the base (1); The other end of the first hinge arm (3) is hinged to the middle of the third hinge arm (5), and is characterized in that: A door closing buffer (44) is installed in the second hinge arm (4), and the door closing buffer (44) extends into the movable path of the fourth hinge arm (6). When the hinge is closed, the door closing buffer (44) and the fourth hinge arm (6) are squeezed to slow down the door closing speed; A door opening buffer (61) is installed in the fourth hinge arm (6), and the door opening buffer (61) extends into the movable path of the third hinge arm (5). When the hinge is opened, the door opening buffer (61) and the third hinge arm (5) are squeezed to slow down the door opening speed.

2. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 1, characterized in that: The door closing buffer (44) is a hydraulic damper. A door closing guide sleeve (45) is fixedly installed in the second hinge arm (4), and the door closing buffer (44) is inserted into the door closing guide sleeve (45).

3. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 1, characterized in that: The door opening buffer (61) is a hydraulic damper. A door opening guide sleeve (62) is fixedly installed in the fourth hinge arm (6), and the door opening buffer (61) is inserted into the door opening guide sleeve (62).

4. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 2, characterized in that: The front and rear ends of the door closing guide sleeve (45) are respectively provided with a first mounting seat (41) and a second mounting seat (42), and the first mounting seat (41) and the second mounting seat (42) are respectively connected to the hinged joints of the third hinge arm (5) and the fourth hinge arm (6) and the second hinge arm (4).

5. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 4, characterized in that: A limiting platform (43) is provided in the second hinge arm (4), the piston rod portion of the door closing buffer (44) is pressed against the limiting platform, and an isolation sleeve (46) is provided outside the piston cylinder of the door closing buffer (44), and the isolation sleeve (46) contacts the fourth hinge arm (6).

6. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 3, characterized in that: The door opening guide sleeve (62) is provided with a first mounting hole (63) and a second mounting hole (64), and a fixing screw passes through the fourth hinge arm (6) and is connected to the first mounting hole (63) and the second mounting hole (64).

7. The hinge for an upward-flipping door with a door opening and closing buffering function according to claim 6, characterized in that: A positioning pressing piece (65) is also installed in the door opening guide sleeve (62), and the piston rod portion of the door opening buffer (61) presses on the positioning pressing piece (65), and the piston cylinder portion of the door opening buffer (61) presses on the fourth hinge arm (6).

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