Four-section force hardware buffer hinge

Abstract

A four-section force hardware buffering hinge comprises a hinge arm and a hinge cup, the hinge arm and the hinge cup are hinged through an upper connecting rod and a lower connecting rod, a four-connecting-rod structure is formed among the hinge arm, the hinge cup, the upper connecting rod and the lower connecting rod, and a torsional spring is arranged between the upper connecting rod and the hinge arm and always pushes the hinge arm to swing in the closing direction. A containing cavity is formed in the hinge arm, a buffer is fixedly installed in the containing cavity, a driving arm is arranged on the lower connecting rod and connected with the buffer, when the hinge is closed, the driving arm interacts with the buffer and the driving arm to achieve the door closing buffering effect, a jacking and pressing protrusion is further arranged on the lower connecting rod, and when the hinge is opened to the maximum angle, the jacking and pressing protrusion abuts against the buffer. And the jacking bulge is propped against a spring ring of the torsional spring. The hinge has the advantages that the unique jacking protrusion is arranged on the lower connecting rod, and when the hinge is opened to the maximum angle, the protrusion abuts against a spring ring of the torsion spring. The innovative design effectively prevents the cabinet door from swinging back when the cabinet door is completely opened, and improves the use stability and safety.

Description

Technical Field

[0001] The utility model relates to a hinge, in particular to a four-stage force hardware buffer hinge. Background Art

[0002] A hinge is an important connecting component widely used in the fields of furniture, doors and windows, etc. Its main function is to enable two objects to be rotatably combined relative to each other. In the furniture manufacturing industry, a hinge usually consists of a hinge cup installed on a cabinet door and a hinge arm assembly installed on a cabinet body, and is used to realize the opening and closing of the cabinet door.

[0003] Traditional hinges have some obvious defects during use. The most prominent problem is that such hinges lack buffer force when opening and closing, resulting in a large impact force when the cabinet door is opened and closed. This impact force will not only cause noise pollution, but more importantly, it will gradually damage the connection between the cabinet door and the cabinet body during long-term use, reduce the service life of the furniture, and affect the user experience.

[0004] To solve this defect of traditional hinges, some manufacturers have developed the so-called one-stage force buffer hinge. The main feature of this improved hinge is that a damper is added to the hinge structure. The introduction of the damper enables the hinge to have a preliminary buffer function, which can slow down the impact force when the cabinet door is opened and closed to a certain extent and improve the use comfort.

[0005] However, although this one-stage force buffer hinge has made progress compared with traditional hinges, there are still significant deficiencies:

[0006] 1. Limited buffer effect: Due to only one-stage buffer force, its buffer effect is often not ideal, especially when the cabinet door is heavy or the opening and closing speed is fast.

[0007] 2. Backswing problem: The most serious problem is that when the cabinet door is opened to the maximum angle, there are often multiple backswing phenomena. This backswing not only affects the use experience, but more importantly, it will cause repeated stress on the connection between the cabinet door and the cabinet body, and it is very likely that the connection will become loose or damaged after long-term use.

[0008] 3. Service life problem: Due to the existence of the backswing phenomenon, the service life of the one-stage force buffer hinge often fails to meet expectations. Frequent backswing will accelerate the wear of each component of the hinge and increase the frequency of maintenance and replacement.

[0009] 4. Poor user experience: The backswing phenomenon not only affects the smoothness of the cabinet door, but may also cause accidental closing, affecting the user's use safety and convenience. Therefore, it is necessary to make further improvements to it. Content of the Utility Model

[0010] The object of the present utility model is to overcome the drawbacks of the existing technology and provide a four-stage force hardware buffer hinge with a simple structure, convenient use, and capable of remaining fixed when the hinge is opened to the maximum angle.

[0011] The object of the present utility model is achieved in the following way: A four-stage force hardware buffer hinge includes a hinge arm and a hinge cup. The hinge arm and the hinge cup are articulated through an upper connecting rod and a lower connecting rod. A four-bar linkage structure is formed among the hinge arm, the hinge cup, the upper connecting rod, and the lower connecting rod. A torsion spring is arranged between the upper connecting rod and the hinge arm, constantly pushing the hinge arm to swing in the closing direction. A receiving cavity is arranged inside the hinge arm, and a buffer is fixedly installed in the receiving cavity. A driving arm is arranged on the lower connecting rod and is connected to the buffer, interacting with the buffer driving arm when the hinge is closed to play a role in buffering the closing of the door. A pressing protrusion is also arranged on the lower connecting rod. When the hinge is opened to the maximum angle, the pressing protrusion abuts against the spring coil of the torsion spring.

[0012] Furthermore: The spring coil is sleeved on a hinge shaft. The hinge shaft is articulated with the hinge arm and the upper connecting rod. The two ends of the spring coil are provided with a first support foot and a second support foot respectively abutting against the hinge arm and the upper connecting rod.

[0013] Furthermore: The pressing protrusion is a circular arc-shaped boss formed by upward stamping of the lower connecting rod body material.

[0014] Furthermore: The height of the pressing protrusion is - millimeters.

[0015] Furthermore: The position of the pressing protrusion corresponds to the position of the spring coil of the torsion spring.

[0016] The beneficial effects of the present utility model are as follows: 1. The structure is simple, the production cost is low, and the market competitiveness is improved.

[0017] 2. Through the ingenious structural design of the present utility model, a four-stage force buffering effect is achieved. This multi-stage force design can provide appropriate buffering forces at different stages of the hinge opening and closing, greatly improving the buffering effect and making the opening and closing of the cabinet door more stable and silent.

[0018] 3. The present utility model is provided with a unique pressing protrusion on the lower connecting rod. When the hinge is opened to the maximum angle, the protrusion abuts against the spring coil of the torsion spring. This innovative design effectively prevents the backswing phenomenon of the cabinet door when it is fully opened, improving the stability and safety of use.

[0019] 4. Through the anti-backswing design and multi-stage force buffering, the present utility model significantly reduces the wear of each component of the hinge and extends the service life of the product. Especially the design of the pressing protrusion effectively reduces the stress of the hinge at the maximum opening angle, further improving the durability. Description of the Drawings

[0020] Figure 1 This is the overall assembly effect diagram of the present utility model.

[0021] Figure 2 This is the structural exploded view of the present utility model.

[0022] Figure 3 This is the partial structural cross-sectional view of the hinge of the present utility model when it is in the open state.

[0023] Figure 4 This is the partial structural cross-sectional view of the hinge of the present utility model when it is in the closed state.

[0024] Figure 5 This is the schematic diagram of the middle and lower connecting rod structure of the present utility model. Specific implementation mode

[0025] The following further specifically describes the present utility model in conjunction with the accompanying drawings. A four-stage force hardware buffer hinge includes a hinge arm 1 and a hinge cup 2. The hinge arm 1 and the hinge cup 2 are hinged through an upper connecting rod 3 and a lower connecting rod 4. A four-bar linkage structure is formed among the hinge arm 1, the hinge cup 2, the upper connecting rod 3 and the lower connecting rod 4. A torsion spring 5 is arranged between the upper connecting rod 3 and the hinge arm 1, which always pushes the hinge arm 1 to swing in the closing direction; a receiving cavity 6 is arranged inside the hinge arm 1, and a buffer 7 is fixedly installed in the receiving cavity 6. A driving arm 41 is arranged on the lower connecting rod 4 and is connected to the buffer 7, and interacts with the driving arm 41 of the buffer 7 when the hinge is closed, playing a role of buffering the closing of the door. A pressing protrusion 42 is also arranged on the lower connecting rod 4. When the hinge is opened to the maximum angle, the pressing protrusion 42 abuts against the spring coil 51 of the torsion spring 5.

[0026] In one embodiment, the spring coil 51 is sleeved on a hinge shaft 9, and the hinge shaft 9 is hinged to the hinge arm 1 and the upper connecting rod 3. First support feet 52 and second support feet 53 are arranged at both ends of the spring coil 51 and respectively abut against the hinge arm 1 and the upper connecting rod 3.

[0027] In one embodiment, the pressing protrusion 42 is a circular arc-shaped convex platform formed by upward stamping of the material of the lower connecting rod 4 body.

[0028] In one embodiment, the height of the pressing protrusion 42 is 1 - 3 millimeters.

[0029] In one embodiment, the position of the pressing protrusion 42 corresponds to the position of the spring coil 51 of the torsion spring 5.

[0030] Working principle: The four-stage force hardware buffer hinge of the present utility model realizes excellent buffering effect and anti-backswing function through ingenious structural design and mechanical principles. Its working principle can be divided into the following stages:

[0031] 1. Closed state:

[0032] When the cabinet door is in a fully closed state, the hinge arm 1 and the hinge cup 2 maintain a certain angle through the upper connecting rod 3 and the lower connecting rod 4. At this time, the torsion spring 5 is in a pre-tightened state, providing an initial resistance for subsequent opening to prevent the cabinet door from accidentally opening.

[0033] 2. Opening process:

[0034] a) First-stage force: When the user starts to open the cabinet door, the torsion spring 5 provides an initial resistance. This resistance not only prevents the cabinet door from suddenly opening but also provides a good touch feeling for the user when opening the door.

[0035] b) Second-stage force: As the opening angle increases, the torque of the torsion spring 5 gradually decreases, and at the same time, the four-link mechanism begins to take effect. At this stage, the hinge provides a smooth opening force, and the user can feel a gentle door-opening process.

[0036] c) Third-stage force: When the opening angle is close to the maximum, the pressing protrusion 42 on the lower connecting rod 4 begins to approach the spring coil 51 of the torsion spring 5, generating resistance.

[0037] d) Fourth-stage force: When the cabinet door reaches the maximum opening angle, the pressing protrusion 42 is in full contact with the spring coil 51. By using the stable fulcrum formed after the contact between the pressing boss and the spring coil, and the torque of the lever being opposite to the torque when opening the door, the hinge arm is locked to the fully open state. This innovative design effectively prevents the cabinet door from swinging back, ensuring that the cabinet door stays stably at the maximum opening position. This not only improves the use safety but also, when installing the hinge, facilitates the installer to open all the hinges and lock them to the maximum angle for solid installation, which is beneficial to improving the installation accuracy and installation efficiency.

[0038] 3. Closing process:

[0039] a) Initial closing: When the user closes the cabinet door, the applied thrust is greater than the elastic deformation force of the lower connecting rod, and the contact state between the pressing protrusion 42 and the spring coil 51 is released. The torsion spring 5 begins to take effect and pushes the hinge arm 1 to swing in the closing direction.

[0040] b) Buffering stage: As the closing angle increases, the driving arm 41 on the lower connecting rod 4 begins to interact with the buffer 7 in the accommodating cavity 6. This design ingeniously converts the kinetic energy of closing the door into the damping force of the buffer, achieving an excellent door-closing buffering effect.

[0041] c) Final closing: Under the action of the buffer 7, the cabinet door closes slowly and smoothly in place, effectively avoiding violent impacts and protecting the cabinet body and the cabinet door.

[0042] Compared with the traditional technology, this structure has an anti-backswing function: by using the innovative cooperation between the pressing protrusion 42 and the spring ring 51, it effectively solves the problem of backswing of the traditional hinge at the maximum opening angle, improves the safety in use, the accuracy and installation efficiency during installation, so it can be widely promoted and used.

Claims

1. A four-stage force hardware buffer hinge, which comprises a hinge arm (1) and a hinge cup (2). The hinge arm (1) and the hinge cup (2) are hinged through an upper connecting rod (3) and a lower connecting rod (4). A four-bar linkage structure is formed among the hinge arm (1), the hinge cup (2), the upper connecting rod (3) and the lower connecting rod (4). A torsion spring (5) is arranged between the upper connecting rod (3) and the hinge arm (1), which always pushes the hinge arm (1) to swing in the closing direction. A receiving cavity (6) is arranged inside the hinge arm (1), and a buffer (7) is fixedly installed inside the receiving cavity (6). A driving arm (41) is arranged on the lower connecting rod (4) and is connected with the buffer (7), and interacts with the driving arm (41) of the buffer (7) when the hinge is closed, playing a role in buffering the closing of the door. It is characterized in that: A pressing projection (42) is further provided on the lower connecting rod (4). When the hinge is opened to the maximum angle, the pressing projection (42) abuts against the spring coil (51) of the torsion spring (5).

2. The four-stage force hardware buffer hinge according to claim 1, characterized in that: The spring coil (51) is sleeved on the hinge shaft (9). The hinge shaft (9) is hinged to the hinge arm (1) and the upper connecting rod (3). First support feet (52) and second support feet (53) are provided at both ends of the spring coil (51) and respectively abut against the hinge arm (1) and the upper connecting rod (3).

3. A four-stage force hardware buffer hinge according to claim 1, characterized in that: The pressing projection (42) is an arc-shaped boss formed by upward stamping of the material of the lower connecting rod (4) body.

4. A four-stage force hardware buffer hinge according to claim 1 or 3, characterized in that: The height of the pressing projection (42) is 1-3 millimeters.

5. A four-stage force hardware buffer hinge according to claim 1 or 3, characterized in that: The position of the pressing projection (42) corresponds to the position of the spring coil (51) of the torsion spring (5).

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