An upturning door hinge capable of arbitrary angle stop based on a butterfly spring drive

Abstract

The utility model provides an upturn door hinge of arbitrary angle stop based on butterfly spring drive, it includes the box seat fixed on the box, is provided with first hinge seat on the box seat, is seted up with first hinge hole in first hinge seat, still include the box door seat fixed on the box door, is provided with second hinge seat on the box door seat, is seted up with second hinge hole in second hinge seat, still include the locating rivet, the locating rivet passes through second hinge hole and first hinge hole fixed connection, second hinge seat rotates around the axis of locating rivet, realizes the opening and closing of hinge, still include the several pieces of butterfly spring set between locating rivet and second hinge seat, butterfly spring produces axial thrust, and the second hinge seat is elastically clamped between the end head for pressure between first hinge seat and locating rivet, the utility model discloses beneficial effect is: the utility model discloses through adopting butterfly spring as the elastic element of providing axial thrust, and it is ingeniously set between locating rivet and second hinge seat, realizes the high integration of component.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, specifically a flip-up door hinge that can stop at any angle based on a butterfly spring drive. Background Technology

[0002] Flip-up doors are widely used in modern small appliances, furniture, cabinets, and various box-type equipment. Their flexible opening mechanism effectively saves space. However, existing flip-up door hinges typically have some limitations, especially in enabling the door to stop at any angle.

[0003] Most common top-hinged door hinges on the market use tension springs as the main support and buffer element to balance the weight of the door and achieve a certain range of hovering. These hinges usually have a large space reserved inside the door housing to accommodate the tension spring. In addition, to transfer the force of the tension spring to the door housing and achieve effective balance, a complex linkage mechanism is often designed and used to connect with the door housing.

[0004] This existing technical solution based on tension springs and linkage mechanisms has the following significant drawbacks:

[0005] 1. Due to the size of the tension spring itself and the structural space required to accommodate the tension spring and linkage mechanism, the entire hinge device is relatively large. This not only increases the space occupied inside the cabinet but also limits the flexibility of the internal design of furniture or equipment.

[0006] 2. The complex linkage mechanism and exposed tension spring components make the hinge's appearance less streamlined and aesthetically pleasing. This is a significant drawback for modern products that prioritize minimalist design and visual appeal.

[0007] 3. The complex structure results in more parts and a more complicated assembly process, which increases the difficulty of installation and the production cost.

[0008] 4. Although some existing hinges can achieve a certain range of hovering, they rely on the fixed or limited adjustable elasticity provided by the tension spring, making it difficult to achieve true "any-angle stop." Users often cannot stably stop the door at any desired angle when opening or closing it, which causes inconvenience in practical use. For example, when the door needs to be stopped at a specific angle to retrieve an item, existing technology may not provide stable support, causing the door to close automatically or open to its maximum angle. Therefore, further improvements are necessary. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a hinge for a flip-up door that is more compact in structure, more aesthetically pleasing in appearance, and can truly achieve a stable stop of the door at any angle.

[0010] The purpose of this utility model is achieved by the following means: a hinge for an upward-opening door that can stop at any angle based on a butterfly spring drive, which includes a box base fixed on a box body, a first hinge seat provided on the box base, and a first hinge hole opened on the first hinge seat.

[0011] It also includes a door seat fixed to the door, a second hinge seat is provided on the door seat, and a second hinge hole is provided on the second hinge seat.

[0012] It also includes a positioning rivet, which passes through the second hinge hole and is fixedly connected to the first hinge hole, hinges the second hinge seat to the first hinge seat, and the second hinge seat rotates around the axis of the positioning rivet to realize the opening and closing of the hinge.

[0013] It also includes several butterfly springs disposed between the positioning rivet and the second hinge seat. The butterfly springs generate axial thrust, which elastically clamps the second hinge seat between the first hinge seat and the pressure-bearing end of the positioning rivet.

[0014] Furthermore, a connecting platform is provided on the outer circumference of the second hinge hole protruding towards the second hinge seat, and the inner side of the connecting platform contacts the outer side of the second hinge seat to form a friction pair.

[0015] Furthermore: an arc-shaped limiting groove is provided on the first hinge seat with the first hinge hole as the center, and a positioning platform is provided on the second hinge seat extending into the arc-shaped limiting groove. The positioning platform slides within the arc-shaped limiting groove to limit the rotation angle of the second hinge seat.

[0016] Furthermore: the first hinge seat has an arc-shaped guide surface with the first hinge hole as the center, and the second hinge seat has a support platform with the second hinge hole as the center, and the support platform slides on the surface of the arc-shaped guide surface.

[0017] Furthermore, the second hinge seat is recessed inward with a clearance groove, the diameter of which is smaller than the outer diameter of the butterfly spring, and the outer circle of the butterfly spring covers the clearance groove.

[0018] Furthermore, the aforementioned disc spring has at least two pieces, which are installed in a mating manner.

[0019] Furthermore, the aforementioned disc spring comprises at least two discs, which are installed in an overlapping manner.

[0020] Furthermore, the diameter of the second hinge hole is larger than the diameter of the positioning rivet.

[0021] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0022] This invention achieves a high degree of component integration by using a butterfly spring as an elastic element to provide axial thrust and cleverly placing it between the positioning rivet and the second hinge seat.

[0023] Compared to traditional tension springs, disc springs are smaller and have a higher load-bearing capacity, eliminating the need for a large additional space to install the spring body and complex linkage mechanism. This makes the entire hinge structure more compact, significantly reducing its overall size and freeing up more usable space inside the cabinet, thus increasing the design freedom of furniture or equipment.

[0024] 4. Because the disc spring and the main force transmission structures—the first hinge seat, the second hinge seat, and the positioning rivets—are all integrated inside the hinge body or closely arranged along the axial direction, the exposure of traditional tension springs and linkage mechanisms is avoided. The overall appearance of the hinge is simpler and smoother, improving the overall aesthetics of the product and meeting the modern design requirements for a clean and simple shape.

[0025] 5. This utility model utilizes the axial thrust generated by a disc spring to elastically clamp the second hinge seat between the first hinge seat and the pressure-bearing end of the positioning rivet. This elastic clamping creates a stable frictional force between the hinge components, allowing the door to achieve a stable and reliable stop at any angle when open or closed, overcoming the limitation of existing technologies that can only stop within a specific range. Users can stop the door at any desired angle, greatly facilitating daily use. Attached Figure Description

[0026] Figure 1 This is a diagram showing the overall assembly and usage effect of this utility model with the box body and box door.

[0027] Figure 2 , 3 This is a schematic diagram of the structure of this utility model.

[0028] Figure 4 This is an exploded view of the structure of this utility model.

[0029] Figure 5 This is a cross-sectional view of the structure of this utility model. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings. A hinge for an upward-opening door that can stop at any angle based on a butterfly spring includes a box base 2 fixed on a box body 1, a first hinge seat 3 provided on the box base 2, and a first hinge hole 4 opened on the first hinge seat 3;

[0031] It also includes a door seat 6 fixed on the door 5, a second hinge seat 7 provided on the door seat 6, and a second hinge hole 8 provided on the second hinge seat 7;

[0032] It also includes a positioning rivet 9, which passes through the second hinge hole 8 and is fixedly connected to the first hinge hole 4, hinges the second hinge seat 7 to the first hinge seat 3, and the second hinge seat 7 rotates around the axis of the positioning rivet 9 to realize the opening and closing of the hinge.

[0033] It also includes several butterfly springs 10 disposed between the positioning rivet 9 and the second hinge seat 7. The butterfly springs 10 generate axial thrust, which elastically clamps the second hinge seat 7 between the first hinge seat 3 and the end 91 on the positioning rivet 9 for bearing pressure.

[0034] In this embodiment, the housing base 2 is fixed to the housing 1, and its first hinge 3 provides a fixed rotation base point. The door base 6 is fixed to the door 5, and its second hinge 7 is the part that rotates with the door. The two hinges are respectively provided with a first hinge hole 4 and a second hinge hole 8, providing a channel for the rivet to pass through.

[0035] In this hinge, the positioning rivet 9 serves as the pivot point of the hinge. It passes through the second hinge hole 8 and the first hinge hole 4, and is fixedly connected to the first hinge hole 4, thereby hinged the first hinge seat 3 and the second hinge seat 7 together. When the door is opened or closed, the second hinge seat 7 rotates relative to the first hinge seat 3 around the axis of the positioning rivet 9, realizing the opening and closing action of the hinge.

[0036] The key to this invention lies in the introduction of a disc spring 10. These disc springs 10 are cleverly positioned between the locating rivet 9 and the second hinge seat 7. When the disc spring 10 is compressed, it generates a stable axial thrust. It is this axial thrust that allows the second hinge seat 7 to be forcefully and elastically clamped between the first hinge seat 3 and the pressure-bearing end 91 of the locating rivet 9. This clamping action generates continuous friction between the contact surfaces of the first hinge seat 3 and the second hinge seat 7.

[0037] The magnitude of this frictional force can be adjusted by changing the number of disc springs, their preload, or their specifications, thereby precisely controlling the stopping damping and stability of the door at any position. Compared to the traditional suspension mechanism that relies on tension springs, this invention achieves stopping through friction, avoiding the disadvantages of large tension spring volume and complex linkage mechanisms, making the hinge structure more compact and efficient.

[0038] In one embodiment: a connecting platform 11 is provided on the outer circumference of the second hinge hole 8 protruding towards the second hinge seat 7, and the inner side of the connecting platform 11 contacts the outer side of the second hinge seat 7 to form a friction pair.

[0039] In this embodiment, a raised connecting platform 11 is additionally designed on the outer circumference of the second hinge hole 8 towards the second hinge seat 7. The inner side of this connecting platform 11 is in close contact with the outer side of the second hinge seat 7, thereby forming an additional friction pair on these contact surfaces.

[0040] When the disc spring 10 applies an axial thrust, in addition to generating friction between the first and second hinge seats, it also induces friction between the connecting platform 11 and the second hinge seat 7. The superposition of these two frictional forces provides resistance to rotation, thereby significantly enhancing the hinge's ability to stop at any angle and its stability.

[0041] This design increases the effective area of ​​the friction surface or provides additional friction points, making the stopping effect more reliable and potentially dispersing wear, thus extending the hinge's lifespan. It also provides a better feel, making the door operation smoother and more controllable.

[0042] In one embodiment, the first hinge seat 3 is provided with an arc-shaped limiting groove 12 centered on the first hinge hole 4, and the second hinge seat 7 is provided with a positioning platform 13 extending into the arc-shaped limiting groove 12. The positioning platform 13 slides within the arc-shaped limiting groove 12 to limit the rotation angle of the second hinge seat 7.

[0043] When the second hinge 7 rotates around the positioning rivet 9, the positioning platform 13 on it slides within the arc-shaped limiting groove 12 of the first hinge 3. Once the positioning platform 13 slides to the end of the arc-shaped limiting groove 12, it will be blocked by the groove wall, thus limiting the continued rotation of the second hinge 7. This determines the limit angles of the opening and closing of the lift-up door.

[0044] This design allows for precise control of the opening and closing range of the cabinet door, preventing damage to the structure due to over-opening or closing, or interference with the surrounding environment, thus improving safety and reliability.

[0045] In one embodiment, the first hinge seat 3 is provided with an arc-shaped guide surface 14 centered on the first hinge hole 4, and the second hinge seat 7 is provided with a support platform 15 centered on the second hinge hole 8. The support platform 15 slides on the surface of the arc-shaped guide surface 14.

[0046] The cooperation between this arc-shaped guide surface and the support platform provides a stable and smooth guide path for the rotation of the second hinge seat 7. Combined with the aforementioned arc-shaped limiting groove and positioning platform 13, it can effectively bear the radial force generated by the door during rotation, preventing the hinge from wobbling or swaying during rotation and ensuring the smoothness of the hinge movement.

[0047] This structure not only enhances the overall rigidity and stability of the hinge, reduces wear during rotation, and extends product life, but also provides users with a smoother and more reliable opening and closing experience.

[0048] In one embodiment, the second hinge seat 7 is recessed inward with a clearance groove 16, the diameter of the clearance groove 16 is smaller than the outer diameter of the butterfly spring 10, and the outer circle of the butterfly spring 10 covers the clearance groove 16.

[0049] The recessed clearance groove 16 on the second hinge seat 7 is mainly used to provide the necessary deformation accommodation space for the disc spring, ensuring that these components do not interfere with each other during hinge assembly and operation.

[0050] In one embodiment, the disc spring 10 is provided with at least two discs, which are installed in an opposing manner.

[0051] When at least two disc springs are installed in pairs, the total deformation of the spring assembly increases under the same load, while its overall stiffness decreases. This allows paired installation to provide a relatively smaller but more uniform force at a given stroke, or to maintain a certain degree of elastic support when larger stroke variations are required.

[0052] This installation method is suitable for use with small cabinet doors, as it compensates for wear gaps with a longer spring travel. It helps to optimize the hinge's operating feel, making it smoother throughout the opening and closing process.

[0053] In one embodiment, the disc spring 10 is provided with at least two pieces, which are installed in an overlapping manner.

[0054] By using at least two overlapping disc springs, the elastic force of the springs can be effectively superimposed, providing greater axial thrust within a limited compression stroke. This makes it suitable for use in large, heavy-duty cabinet doors.

[0055] In one embodiment, the diameter of the second hinge hole 8 is larger than the diameter of the positioning rivet 9.

[0056] The diameter of the second hinge hole 8 is larger than the diameter of the positioning rivet 9, which results in a certain radial gap between the two when the positioning rivet passes through the second hinge hole.

[0057] The existence of this gap firstly greatly facilitates the hinge assembly process, avoiding jamming caused by accumulated dimensional tolerances. Secondly, it allows the second hinge seat 7 to have a small amount of floating space when rotating around the locating rivet 9, thereby reducing frictional resistance caused by misalignment or minor deformation, making rotation more flexible and smooth. Simultaneously, in certain designs, this gap can also be used to accommodate thin-walled bushings or lubricants, further improving rotational performance.

[0058] In summary, the core working principle of the upward-opening door hinge based on a butterfly spring drive that can stop at any angle proposed in this utility model lies in the ingenious use of the axial thrust generated by the butterfly spring 10 to form a stable and controllable frictional force between the first hinge seat 3 and the second hinge seat 7, thereby achieving reliable stopping of the door at any opening angle.

[0059] Specifically, the positioning rivet 9 serves as the rotation axis, hinged between the first hinge seat 3 at the fixed end and the second hinge seat 7 at the door end. The key innovation lies in the arrangement of the disc springs 10: they are placed between the positioning rivet 9 and the second hinge seat 7, and through axial compression, elastically clamp the second hinge seat 7 between the first hinge seat 3 and the end 91 of the positioning rivet 9. This elastic clamping ensures that the contact surfaces of the two hinged components remain in close contact, generating continuous frictional resistance. When the door is opened or closed to a certain angle, as long as the external force is insufficient to overcome this frictional force, the door can stably stop at that angle.

[0060] Therefore, this utility model, through its compact structural design, utilizes the axial thrust of a butterfly spring to create continuous friction, and is supplemented by various structural detail optimizations. It not only overcomes the shortcomings of existing technologies such as large size, poor aesthetics, and inability to stop at any angle, but also achieves a simple structure, stable function, smooth operation, and high reliability for stopping the upward-opening door at any angle. Therefore, it can be widely promoted and used.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A butterfly spring driven overhanging door hinge with arbitrary angle stop, characterized in that: It includes a box seat (2) fixed on the box body (1), a first hinge seat (3) is provided on the box seat (2), and a first hinge hole (4) is provided on the first hinge seat (3); It also includes a door seat (6) fixed on the door (5), a second hinge seat (7) is provided on the door seat (6), and a second hinge hole (8) is provided on the second hinge seat (7). It also includes a positioning rivet (9), which passes through the second hinge hole (8) and is fixedly connected to the first hinge hole (4), and hinges the second hinge seat (7) to the first hinge seat (3). The second hinge seat (7) rotates around the axis of the positioning rivet (9) to realize the opening and closing of the hinge. It also includes several butterfly springs (10) disposed between the positioning rivet (9) and the second hinge (7). The butterfly springs (10) generate axial thrust, which elastically clamps the second hinge (7) between the first hinge (3) and the end (91) on the positioning rivet (9) for bearing pressure.

2. The upward-opening door hinge based on a butterfly spring and capable of stopping at any angle according to claim 1, characterized in that: The outer circumference of the second hinge hole (8) is provided with a connecting platform (11) protruding towards the second hinge seat (7). The inner side of the connecting platform (11) contacts the outer side of the second hinge seat (7) to form a friction pair.

3. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, is characterized in that: The first hinge seat (3) is provided with an arc-shaped limiting groove (12) centered on the first hinge hole (4). The second hinge seat (7) is provided with a positioning platform (13) extending into the arc-shaped limiting groove (12). The positioning platform (13) slides within the arc-shaped limiting groove (12) to limit the rotation angle of the second hinge seat (7).

4. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, is characterized in that: The first hinge seat (3) has an arc-shaped guide surface (14) with the first hinge hole (4) as the center, and the second hinge seat (7) has a support platform (15) with the second hinge hole (8) as the center. The support platform (15) slides on the surface of the arc-shaped guide surface (14).

5. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, characterized in that: The second hinge seat (7) is recessed inward and has a clearance groove (16). The diameter of the clearance groove (16) is smaller than the outer diameter of the butterfly spring (10), and the outer circle of the butterfly spring (10) covers the clearance groove (16).

6. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, is characterized in that: The butterfly spring (10) is provided with at least two pieces, which are installed in a mating manner.

7. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, is characterized in that: The butterfly spring (10) is provided with at least two pieces, which are installed in an overlapping manner.

8. A hinge for a flip-up door that can stop at any angle based on a butterfly spring drive, as described in claim 1, is characterized in that: The diameter of the second hinge hole (8) is greater than the diameter of the positioning rivet (9).

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