Upturning door hinge

Abstract

An upturning door hinge 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. The other end of the first hinge arm is hinged with the middle part of the third hinge arm; a driving arm is installed in the second hinge arm in a hinged mode, one end of the driving arm is in threaded connection with an adjusting bolt arranged in the second hinge arm, and the other end of the second hinge arm is installed in a guide groove in the second hinge arm in a sliding mode through a guide column. The linkage arm is hinged in the base, one end of the linkage arm is hinged with the pull rod, and the other end of the pull rod is hinged with the guide post; a spring guide rod is further installed in the base in a hinged mode, the spring guide rod is sleeved with a pre-pressing spring, one end of the spring guide rod is sleeved with a spring pressing plate, and the pre-pressing spring reversely drives the second hinge arm to move through the spring pressing plate, the linkage arm and the pull rod so as to provide door opening assistance when the hinge is opened.

Description

Technical Field

[0001] The utility model relates to a hardware hinge, in particular to a hinge for an upward-turning door. Background Art

[0002] Currently, in the furniture industry, especially in household products such as kitchens and cabinets, there are many different door opening and closing methods. Among them, flip-up door hinges are a common opening and closing mechanism and are widely used in these fields. A flip-up door hinge connects the cabinet body and the door via a hinge arm. When the door is opened, it flips upward, forming a certain angle with the cabinet body, making it easier for users to access items. Existing flip-up door hinge structures generally use a multi-link mechanism, which allows the door to open and close relatively smoothly.

[0003] However, although the existing technology can provide a certain degree of door opening assistance, making it easier for users to flip the cabinet door, it still has the following obvious shortcomings and deficiencies:

[0004] 1. Existing hinges for flip-up doors often use fixed springs or pneumatic support structures to assist in opening the door. However, these spring forces are typically preset and cannot be adjusted based on the weight of the door. This results in excessive spring force causing the door to bounce too quickly when opening a lightweight door, making it difficult to control the speed. Conversely, when the door is heavy, the preset spring force may not be sufficient to provide sufficient assistance, making it difficult for the user to open the door. Existing hinges cannot adapt to doors of varying thickness, material, or size, and therefore lack flexibility.

[0005] 2. Existing hinges for flip-up doors are typically designed as standardized products, suitable for a certain range of door weights. However, due to the inability to adjust the spring or pneumatic support, they cannot fully adapt to doors of varying weights. For example, with heavier doors, the lack of sufficient support makes opening the door difficult, resulting in a poor user experience. On the other hand, with lighter doors, excessive support can easily cause the door to bounce back too quickly when opened, increasing the impact on the door and potentially shortening the service life of the door and hinge.

[0006] 3. In existing technologies, the lack of adjustable spring force often makes precise control of door opening speed difficult. In some cases, users may need to adjust the door opening speed based on different usage environments or personal preferences, but structural limitations of existing flip-up door hinges often prevent this. This lack of elasticity and flexibility can easily lead to sudden opening and closing of the door during use, increasing potential safety hazards. Therefore, further improvements are necessary. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a flip door hinge with a simple structure, easy use, and door opening elasticity that can be adjusted according to the weight of the door body, which can effectively control the opening and closing speed of the door and provide a smoother door opening and closing experience.

[0008] The purpose of the utility model is achieved in the following way: a flip door hinge, which includes a base fixed in the cabinet body and a door seat fixed on the cabinet door, wherein a first hinge arm and a second hinge arm are hingedly installed in the base, and the second hinge arm is hingedly connected to the door seat through a third hinge arm and a fourth hinge arm;

[0009] 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;

[0010] The other end of the first hinge arm is hinged to the middle of the third hinge arm;

[0011] A driving arm is hingedly installed in the second hinge arm, one end of the driving arm is threadedly connected to an adjusting bolt provided in the second hinge arm, and the other end of the second hinge arm is slidably installed in a guide groove located on the second hinge arm through a guide column;

[0012] It also includes a linkage arm hingedly mounted in the base, one end of the linkage arm is hingedly connected to the pull rod, and the other end of the pull rod is hingedly connected to the guide column;

[0013] A spring guide rod is also hingedly installed in the base, and a pre-stressed spring is sleeved on the outside of the spring guide rod. One end of the spring guide rod is sleeved with a spring pressure plate, which presses on one end of the pre-stressed spring, and the other end of the linkage arm is hinged to the spring pressure plate; the pre-stressed spring drives the second hinge arm to move in the reverse direction through the spring pressure plate, the linkage arm and the pull rod, providing door opening assistance when the hinge is opened.

[0014] Furthermore: an adjustment hole is provided on the second hinge arm, and the adjustment bolt passes through the adjustment hole and is threadedly connected to the adjustment nut provided on the end of the driving arm.

[0015] Furthermore: the bottom of the second hinge arm is provided with a concave adjustment platform, and the adjustment hole is provided in the adjustment platform.

[0016] Furthermore: a limit groove is provided on the spring guide rod, a limit shaft is provided on the spring pressure plate, the limit shaft is inserted into the limit groove, and the spring pressure plate is installed on the spring guide rod to limit the relative displacement between the spring pressure plate and the spring guide rod.

[0017] Furthermore, the two ends of the limiting shaft are protruding from the end surfaces of the spring pressure plate, and the linkage arm is hinged to the spring pressure plate through the limiting shaft.

[0018] Furthermore: the linkage arm is provided with two pieces, and the two linkage arms are connected by a bottom plate, forming a clamping area between the two linkage arms, and the pull rod and the spring pressure plate are clamped and installed in the clamping area.

[0019] Furthermore: a door closing buffer is installed in the second hinge arm, and the door closing buffer extends into the movable path of the fourth hinge arm. When the hinge is closed, the door closing buffer is squeezed by the fourth hinge arm to slow down the door closing speed.

[0020] 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.

[0021] Furthermore: a door opening buffer is installed in the fourth hinge arm, and the door opening buffer extends into the movable path of the third hinge arm. When the hinge is opened, the door opening buffer is squeezed with the third hinge arm to slow down the door opening speed.

[0022] 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.

[0023] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0024] 2. This utility model incorporates an adjustment bolt and preload spring within the second hinge arm, allowing the door-opening force to be adjusted based on the weight of the door. The adjustment bolt is connected to the drive arm, and rotating the adjustment bolt precisely adjusts the compression of the preload spring, thereby varying the spring force. This design allows the user to flexibly adjust the door-opening force based on the weight of the door, ensuring smooth opening regardless of door weight, without compromising the user experience due to excessive or insufficient spring force.

[0025] 3. Thanks to its adjustable spring force, the hinged door hinge of this utility model can accommodate doors of varying weights. Whether lightweight or heavy, the spring force can be adjusted to provide the appropriate opening force, ensuring a smooth and gentle door opening. Compared to traditional hinges with no adjustable spring force, this hinge greatly expands its applicability, meeting the needs of doors of varying materials and sizes.

[0026] 4. The hinge of this utility model is equipped with a buffer device for opening and closing the door. By installing a door opening buffer and a door closing buffer in the second hinge arm and the fourth hinge arm respectively, the door body can be cushioned during the opening and closing process, avoiding sudden opening or closing and preventing the door from being impacted by excessive speed. This not only improves the safety of the door body but also extends the service life of the hinge.

[0027] 5. This utility model utilizes a combined design of a linkage arm, pull rod, and spring guide rod to form a stable force transmission mechanism, enabling the preloaded spring to provide door opening assistance through the spring pressure plate and linkage arm. This design ensures reliable force transmission and avoids situations where insufficient or ineffective assistance may occur due to an unreasonable structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the hinge in the open state of the present invention.

[0029] Figure 2 This is a schematic diagram of the hinge closed state in the present invention.

[0030] Figure 3 This is a structural exploded view of the utility model.

[0031] Figure 4 This is a schematic diagram of the structure of the utility model after the shell is hidden.

[0032] Figure 5 This is a schematic diagram of the adjusting bolt in the present invention being in the tightest state.

[0033] Figure 6 This is a schematic diagram of the adjusting bolt in the present invention in the loosest state.

[0034] Figure 7 This is a cross-sectional view of the structure of the utility model. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings. A hinge for an upward-turning door 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.

[0036] 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.

[0037] The other end of the first hinge arm 3 is hinged to the middle of the third hinge arm 5;

[0038] A driving arm 7 is hingedly mounted in the second hinge arm 4. One end of the driving arm 7 is screwed to an adjusting bolt 8 provided in the second hinge arm 4. The other end of the second hinge arm 4 is slidably mounted in a guide groove 41 on the second hinge arm 4 via a guide post 9.

[0039] It also includes a linkage arm 10 hingedly mounted in the base 1, one end of the linkage arm 10 is hingedly connected to a pull rod 11, and the other end of the pull rod 11 is hingedly connected to the guide column 9;

[0040] A spring guide rod 12 is also hingedly installed in the base 1, and a pre-loaded spring 13 is sheathed on the outside of the spring guide rod 12. A spring pressure plate 14 is sheathed on one end of the spring guide rod 12. The spring pressure plate 14 is pressed on one end of the pre-loaded spring 13, and the other end of the linkage arm 10 is hinged to the spring pressure plate 14; the pre-loaded spring 13 drives the second hinge arm 4 to move in the reverse direction through the spring pressure plate 14, the linkage arm 10 and the pull rod 11, providing door opening assistance when the hinge is opened.

[0041] In one embodiment, an adjustment hole 42 is provided on the second hinge arm 4 , and the adjustment bolt 8 passes through the adjustment hole 42 and is threadedly connected to the adjustment nut 71 provided on the end of the driving arm 7 .

[0042] In one embodiment, a concave adjustment platform 43 is provided at the bottom of the second hinge arm 4 , and the adjustment hole 42 is provided in the adjustment platform 43 .

[0043] In one embodiment, a limiting groove 15 is provided on the spring guide rod 12, and a limiting shaft 16 is provided on the spring pressure plate 14. The limiting shaft 16 is inserted into the limiting groove 15, and the spring pressure plate 14 is installed on the spring guide rod 12 to limit the relative displacement between the spring pressure plate 14 and the spring guide rod 12.

[0044] In one embodiment, both ends of the limiting shaft 16 protrude from the end surface of the spring pressure plate 14 , and the linkage arm 10 is hinged to the spring pressure plate 14 via the limiting shaft 16 .

[0045] In one embodiment, the linkage arm 10 is provided with two pieces, and the two linkage arms 10 are connected by a bottom plate 17, forming a clamping area 18 between the two linkage arms 10, and the pull rod 11 and the spring pressure plate 14 are clamped and installed in the clamping area 18.

[0046] In one embodiment, 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 is squeezed by the fourth hinge arm 6 to slow down the closing speed.

[0047] 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 .

[0048] In one embodiment, 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.

[0049] 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 .

[0050] Working Principle: This utility model's flip-up door hinge primarily relies on a four-bar linkage to achieve smooth opening and closing of the door. This four-bar linkage consists of a base 1, a second hinge arm 4, a third hinge arm 5, and a fourth hinge arm 6, articulated with the door base 2. When the user pushes or pulls the door, the hinge arms within the four-bar linkage move relative to each other through their hinge points, causing relative displacement between the door base 2 and the base 1, causing the door to flip upward at a certain angle. Throughout the entire flipping process, the four-bar linkage provides stable mechanical support, ensuring smooth and stable opening and closing of the door.

[0051] The present invention incorporates a drive arm 7 and an adjustment bolt 8 within the second hinge arm 4, and provides door-opening assistance via a spring guide rod 12 and a preload spring 13. When the door is closed, the preload spring 13 is compressed, storing energy for the door opening process. When the user opens the door, the preload spring 13 reverses the direction of motion of the second hinge arm 4 via a spring pressure plate 14, a linkage arm 10, and a pull rod 11, providing an upward force. This reduces the force required to open the door, and helps maintain the door's open position.

[0052] It's worth noting that the adjustment bolt 8 is threadedly connected to the drive arm 7. By rotating the adjustment bolt, the user can change the fulcrum position between the pull rod 11 and the second drive arm, thereby changing the amount of compression on the preload spring when the hinge opens and closes, and thus adjusting the spring's elastic force. This design allows the hinge to be adjusted to suit door weights, ensuring the appropriate door opening force for both lightweight and heavy doors.

[0053] Furthermore, to prevent impact caused by rapid door opening and closing, the present invention incorporates a closing buffer 44 and an opening buffer 61 within the second hinge arm 4 and fourth hinge arm 6, respectively. When the user closes the door, the fourth hinge arm 6 compresses against the closing buffer 44 during movement, providing resistance and slowing the door's closing speed, thus preventing noise and damage from rapid closing. Similarly, when the door opens, the third hinge arm 5 compresses the opening buffer 61, slowing the door's opening speed and providing a gentler opening experience.

[0054] The spring guide rod 12 is provided with a limit slot 15, while the spring pressure plate 14 is provided with a limit shaft 16, which is inserted into the limit slot. This design limits the relative displacement between the spring pressure plate and the spring guide rod, ensuring that the spring guide rod can extend and retract within a specified range, preventing structural damage or failure due to excessive spring displacement. Furthermore, the guide post 9 is slidably mounted on the second hinge arm 4 via a guide slot 41. The guide slot ensures the guide post's direction of movement, ensuring that the entire hinge structure remains stable during opening and closing.

[0055] One of the greatest technical advantages of this invention over conventional technologies lies in its adjustable door-opening force. By adjusting bolt 8 to control the force of preload spring 13, the user can adjust the hinge's door-opening force according to the weight of the door. This design solves the problem of fixed force in existing technologies, allowing the hinge to adapt to doors of varying weights, ensuring a balanced door-opening experience for both light and heavy doors.

[0056] At the same time, through the rational design of the four-bar linkage, the hinge points between the hinge arms maintain good coordination during the door opening and closing process, ensuring the door's smooth movement during opening and closing, and avoiding the problems of jamming and shaking that may occur in traditional hinge designs. Furthermore, the sliding guide slot 41 further enhances the stability of the hinge, ensuring the smooth operation of the entire structure.

[0057] In addition, by providing the door opening buffer 61 and the door closing buffer 44, the present invention effectively controls the opening and closing speed of the door body, avoiding the impact caused by excessive speed during the door opening and closing process. This not only improves the safety of the door body, but also extends the service life of the hinge and the door body.

[0058] In summary, the present invention has a compact design, with rational layout of components, does not occupy excessive space, and is easy to install. Furthermore, due to the adjustable elastic force, the hinge can adapt to doors of different sizes and weights, has strong applicability, and can be widely used on various types of cabinet doors, and is therefore suitable for widespread promotion and use.

[0059] 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 hinge for an upturned door, characterized by: It comprises a base (1) fixed in the 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); A driving arm (7) is hingedly installed in the second hinge arm (4), one end of the driving arm (7) is screwed to an adjusting bolt (8) provided in the second hinge arm (4), and the other end of the second hinge arm (4) is slidably installed in a guide groove (41) located on the second hinge arm (4) through a guide column (9); It also includes a linkage arm (10) hingedly mounted in the base (1), one end of the linkage arm (10) is hingedly connected to a pull rod (11), and the other end of the pull rod (11) is hingedly connected to a guide column (9); A spring guide rod (12) is hingedly installed in the base (1), and a preload spring (13) is sleeved on the outside of the spring guide rod (12). One end of the spring guide rod (12) is sleeved with a spring pressure plate (14), and the spring pressure plate (14) is pressed on one end of the preload spring (13). The other end of the linkage arm (10) is hinged to the spring pressure plate (14); the preload spring (13) drives the second hinge arm (4) to move in the reverse direction through the spring pressure plate (14), the linkage arm (10) and the pull rod (11), thereby providing door opening assistance when the hinge is opened.

2. The hinge for an upturned door according to claim 1, characterized in that: The second hinge arm (4) is provided with an adjustment hole (42), and the adjustment bolt (8) passes through the adjustment hole (42) and is threadedly connected to the adjustment nut (71) provided at the end of the driving arm (7).

3. The hinge for an upturned door according to claim 2, characterized in that: The bottom of the second hinge arm (4) is provided with a concave adjustment platform (43), and the adjustment hole (42) is provided in the adjustment platform (43).

4. The hinge for an upturned door according to claim 1, characterized in that: The spring guide rod (12) is provided with a limiting groove (15), and the spring pressure plate (14) is provided with a limiting shaft (16). The limiting shaft (16) is inserted into the limiting groove (15). The spring pressure plate (14) is installed on the spring guide rod (12) to limit the relative displacement between the spring pressure plate (14) and the spring guide rod (12).

5. The hinge for an upturned door according to claim 4, characterized in that: The two ends of the limiting shaft (16) are protruding from the end surface of the spring pressure plate (14), and the linkage arm (10) is hinged to the spring pressure plate (14) through the limiting shaft (16).

6. The hinge for an upturned door according to claim 1, characterized in that: The linkage arm (10) is provided with two pieces, and the two linkage arms (10) are connected through a bottom plate (17). A clamping area (18) is formed between the two linkage arms (10), and the pull rod (11) and the spring pressure plate (14) are clamped and installed in the clamping area (18).

7. The hinge for an upturned door according to claim 1, 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) is squeezed with the fourth hinge arm (6) to slow down the door closing speed.

8. The hinge for an upturned door according to claim 7, 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).

9. The hinge for an upturned door according to claim 1, characterized in that: 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.

10. The hinge for an upturned door according to claim 9, 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).

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