Cabinet door hinge with door opening buffering function

Abstract

A cabinet door hinge with a door opening buffering function comprises a base and a hinge arm installed on the base in a hinged mode, a containing cavity is formed in the base, a pull arm is installed in the containing cavity, one end of the pull arm is hinged to the hinge arm, and the other end of the pull arm is connected with the base through a tension spring. A damper is further installed in the containing cavity, one end of the damper is fixed to the base, the other end of the damper is connected with the pull arm, when the hinge arm is opened, the damper generates damping force to stop the pull arm from moving, and therefore the damping effect is generated when the door hinge is opened. The door opening buffering device has the advantages that the damper is arranged in the base, impact force generated in the opening process of the cabinet door is effectively relieved, and the door opening buffering function is achieved. The damping force generated by the damper can smoothly slow down the movement of the pull arm, so that strong collision and noise are not generated when the cabinet door is opened, and the opening stability and mute effect of the cabinet door are improved.

Description

Technical Field

[0001] This utility model relates to a hardware hinge, specifically a cabinet door hinge with a door opening buffer function. Background Technology

[0002] Cabinet door hinges, as crucial components connecting the cabinet body and door, determine the opening and closing experience and lifespan of the cabinet door. Currently, cabinet door hinges are widely used in appliances, home furnishings, offices, medical devices, and other fields. Their main function is to provide support and connection when the cabinet door opens or closes, ensuring smooth rotation. However, existing hinge designs have several flaws, causing inconvenience for users and even affecting the overall experience and the hinge's lifespan.

[0003] 1. Lack of cushioning, resulting in an uneven cabinet door opening process: Existing ordinary cabinet door hinges lack effective cushioning devices. When opening, the cabinet door closes quickly due to gravity or external force applied by the user, easily causing an impact. This impact not only generates noise but also accelerates the wear and tear on the cabinet door and hinges, thus affecting the cabinet door's lifespan. This impact noise is particularly inconvenient in places with high requirements for quiet, such as homes, offices, or medical institutions. Furthermore, strong impacts may cause door deformation, affecting the cabinet door's sealing and aesthetics.

[0004] 2. Inadequate damping device design leads to complex installation and high costs: To improve the opening effect of door hinges, some existing technologies attempt to add damping devices to cabinet door hinges to slow down the opening speed and reduce impact. However, these damping devices are mostly independent components, fixed to the door hinge through additional brackets or complex structures, making the overall hinge structure complex. Installation requires multiple adjustments, which is time-consuming and labor-intensive. Furthermore, due to the complex structure, the manufacturing and maintenance costs of damping devices are high, affecting their market promotion and application scope.

[0005] 3. The force-bearing design is inadequate, failing to maintain a stable closing effect during prolonged use. Existing damping devices gradually weaken after long-term use, especially with repeated opening and closing. The oil seals or other components of the damper are prone to aging, leading to a decrease in damping force and an inability to maintain proper cushioning function. Furthermore, the lack of a reasonable tension or push spring design makes the cabinet door prone to rebound or instability when opened, resulting in a poor user experience.

[0006] In conclusion, existing cabinet door hinge technology has many shortcomings in terms of buffering performance, structural stability, installation complexity, and durability, so it is necessary to make further improvements. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a cabinet door hinge with a door opening buffer function that is simple in structure, easy to use, and makes the cabinet door open more gently, avoiding impact.

[0008] The purpose of this utility model is achieved in the following way: a cabinet door hinge with a door opening buffer function, which includes a base and a hinge arm hinged on it. The base is provided with a receiving cavity, and a pull arm is installed in the receiving cavity. One end of the pull arm is hinged to the hinge arm, and the other end is connected to the base through a tension spring. The tension spring generates a pulling force that continuously pulls the hinge arm to move in the closing direction through the pull arm.

[0009] A damper is also installed inside the cavity. One end of the damper is fixed to the base, and the other end is connected to the pull arm. When the hinge arm is opened, the damper generates a damping force to block the movement of the pull arm, thereby producing a damping effect when the door hinge is opened.

[0010] Furthermore: the pull arm and the hinge arm are connected by a connecting rod, the head of the connecting rod is hinged to the hinge arm, and the tail of the connecting rod is hinged to the pull arm through a first hinge shaft. The base is provided with a first sliding groove, and the front and rear ends of the first hinge shaft extend into the first sliding groove for sliding.

[0011] Furthermore, the base is provided with a second sliding groove, and the other end of the pull arm is equipped with a second hinge shaft, the front and rear ends of the second hinge shaft extending into the second sliding groove for sliding.

[0012] Furthermore: the damper is a compression type hydraulic damper, the cylinder part of the damper is connected to the base, and the damping rod of the damper is connected to the pull arm.

[0013] Furthermore, a baffle is provided inside the pull arm, and the baffle presses against the damping rod.

[0014] Furthermore: a positioning pin is installed inside the main body, and the positioning pin is set to press against the tail of the damper cylinder part. A positioning pressure plate is also provided inside the main body, and the positioning pressure plate is set to press against the cylindrical surface of the damper cylinder part.

[0015] Furthermore, the base is also provided with a third sliding groove, in which a third hinge shaft is slidably installed, and a roller is installed on the third hinge shaft. The base is also provided with a push spring mechanism, which pushes the roller to move in the direction of the hinge arm. The hinge arm is provided with a locking boss protruding in the direction of the roller.

[0016] Furthermore: the push spring mechanism includes a push spring frame and a spring that is looped around it. One end of the push spring frame is connected to the third hinge shaft, and the other end of the push spring frame is inserted into the push spring hole in the base. One end of the spring is supported on the push spring hole, and the other end is supported on the push spring frame.

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

[0018] 2. This utility model effectively reduces the impact force during cabinet door opening by incorporating a damper inside the base, achieving a buffer opening function. The damping force generated by the damper smoothly slows down the movement of the pull arm, preventing strong collisions and noise when the cabinet door opens, thus improving the smoothness and quietness of the door opening. This buffering function effectively extends the service life of the door hinges and cabinet door, making it suitable for use in quiet environments such as homes, offices, or medical facilities.

[0019] 3. Key components such as the damper and tension spring of this utility model are all built into the receiving cavity of the base, and modular design is achieved through structures such as connecting rods and sliding grooves. The application of the push spring mechanism ensures that the roller always maintains a pushing force on the hinge arm, and the locking boss further ensures the stable closure of the cabinet door, preventing the cabinet door from opening when not in operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model in the closed state.

[0021] Figure 2 This is a cross-sectional view of the structure of this utility model in the closed state.

[0022] Figure 3 This is a schematic diagram of the structure of the present invention in the open state.

[0023] Figure 4 This is a cross-sectional view of the structure of this utility model in its open state.

[0024] Figure 5 This is an exploded view of the structure of this utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. A cabinet door hinge with a door opening buffer function includes a base 1 and a hinge arm 2 hinged thereon. The base 1 has a receiving cavity 11, and a pull arm 3 is installed within the receiving cavity 11. One end of the pull arm 3 is hinged to the hinge arm 2, and the other end is connected to the base 1 via a tension spring 4. The tension spring 4 generates a pulling force that continuously pulls the hinge arm 2 towards the closing direction via the pull arm 3.

[0026] A damper 5 is also installed in the cavity 11. One end of the damper 5 is fixed to the base 1, and the other end is connected to the pull arm 3. When the hinge arm 2 is opened, the damper 5 generates a damping force to block the movement of the pull arm 3, thereby generating a damping effect when the door hinge is opened.

[0027] In one embodiment: the pull arm 3 and the hinge arm 2 are connected by a connecting rod 6. The head of the connecting rod 6 is hinged to the hinge arm 2, and the tail of the connecting rod 6 is hinged to the pull arm 3 through a first hinge shaft 61. The base 1 is provided with a first sliding groove 12, and the front and rear ends of the first hinge shaft 61 extend into the first sliding groove 12 for sliding.

[0028] In one embodiment: the base 1 is further provided with a second slide groove 13, and the other end of the pull arm 3 is equipped with a second hinge shaft 31, the front and rear ends of the second hinge shaft 31 extending into the second slide groove 13 for sliding.

[0029] In one embodiment: the damper 5 is a compression type hydraulic damper 5, the cylinder part of the damper 5 is connected to the base 1, and the damping rod of the damper 5 is connected to the pull arm 3.

[0030] In one embodiment: a baffle 32 is provided inside the pull arm 3, and the baffle 32 presses against the damping rod.

[0031] In one embodiment: a positioning pin 35 is installed inside the main body, and the positioning pin is set to press against the tail of the cylinder part of the damper 5. A positioning pressure plate 33 is also provided inside the main body, and the positioning pressure plate 33 is set to press against the cylindrical surface of the cylinder part of the damper 5.

[0032] In one embodiment: the base 1 is further provided with a third slide groove 14, a third hinge shaft 15 is slidably installed in the third slide groove 14, a roller 16 is installed on the third hinge shaft 15, the base 1 is further provided with a push spring mechanism, the push spring mechanism pushes the roller 16 to move in the direction of the hinge arm 2, and the hinge arm 2 is provided with a locking boss 21 protruding in the direction of the roller 16.

[0033] In one embodiment: the push spring mechanism includes a push spring frame 17 and a spring 18 encircling it. One end of the push spring frame 17 is connected to the third hinge shaft 15, and the other end of the push spring frame 17 is inserted into the push spring hole 19 in the base 1. One end of the spring 18 is supported on the push spring hole 19, and the other end is supported on the push spring frame 17.

[0034] Working Principle: During the cabinet door opening process, the pull arm 3, under the action of the tension spring 4, continuously applies a pulling force in the closing direction to balance the weight of the cabinet door. This ensures that the hinge arm 2 automatically closes when its closing angle is less than a set value. When the hinge arm angle is greater than the set value, the weight of the cabinet door exceeds the tension spring force, at which point the damper 5 activates. One end of the damper 5 is fixed inside the base 1, and the other end is connected to the pull arm 3. The damping force generated by the damper 5 counteracts the weight and acceleration force of the cabinet door, effectively slowing down the opening speed of the pull arm 3 and making the cabinet door opening process smooth, thus preventing the cabinet door from colliding with the tabletop or other surfaces.

[0035] In this case, thanks to the buffering effect of the damper 5, the cabinet door can open smoothly and quietly, avoiding noise and vibration caused by impact, reducing wear on the door hinges and cabinet body, and extending the product's service life.

[0036] The pull arm 3 is hinged to the hinge arm 2 via a connecting rod 6, and the tail of the connecting rod 6 is connected to the first slide groove 12 via a first hinge pin 61. The first slide groove 12 allows the first hinge pin 61 to slide freely within it to accommodate different opening and closing angles of the hinge arm 2, thereby achieving smooth opening and closing of the cabinet door. In addition, the base 1 is also provided with a second slide groove 13, and the second hinge pin 31 is connected to the other end of the pull arm 3 and slides within the second slide groove 13. The design of these slide grooves and hinge pins enables the pull arm 3 to perform smooth linear movement during opening and closing, avoiding uneven force on the damper and tension spring.

[0037] The damper 5 employs a compression-type hydraulic damping structure, with the cylinder body fixed within the base 1 and the damping rod connected to the pull arm 3. As the cabinet door gradually opens, the damping rod is compressed within the cylinder, and the hydraulic structure generates a damping force to counteract the movement speed of the pull arm. Simultaneously, a baffle 32 is installed inside the pull arm 3, pressing against the damping rod to stably transmit the damping force to the pull arm. This design increases the force-bearing area between the damper and the pull arm, and the force-bearing position is located in the middle of the pull arm, resulting in stable and efficient force distribution on the pull arm.

[0038] Furthermore, a third slide groove 14 is provided on the base 1, within which a third hinge shaft 15 is installed, and a roller 16 is fixed on the third hinge shaft 15. A push spring mechanism is also provided within the base 1, comprising a push spring frame 17 and a spring 18 covering the push spring frame. The spring 18 consistently transmits thrust to the roller 16, pushing the roller to move towards the hinge arm 2. A locking boss 21 is provided on the hinge arm 2. When the cabinet door is closed, the roller 16 cooperates with the locking boss 21 to achieve stable closure. Simultaneously, under the action of the push spring mechanism, the roller 16 is always in a state of applying force towards the hinge arm, ensuring that the door hinge still has good closing performance after prolonged use.

[0039] In summary, through the innovative structure described above, this utility model's cabinet door hinge achieves multiple functions, including smooth and buffered opening, and automatic locking. This not only ensures the cabinet door's opening efficiency but also effectively improves the hinge's lifespan and user experience. The structural design simplifies installation, reduces maintenance costs, and is particularly suitable for scenarios requiring quiet operation and high usage frequency, thus possessing broad application prospects.

[0040] 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 cabinet door hinge with a door opening buffer function, characterized in that: It includes a base (1) and a hinge arm (2) hinged thereon. The base (1) has a receiving cavity (11) and a pull arm (3) is installed in the receiving cavity (11). One end of the pull arm (3) is hinged to the hinge arm (2), and the other end is connected to the base (1) through a tension spring (4). The tension spring (4) generates a pulling force that pulls the hinge arm (2) in the closing direction through the pull arm (3). A damper (5) is also installed in the cavity (11). One end of the damper (5) is fixed to the base (1), and the other end is connected to the pull arm (3). When the hinge arm (2) is opened, the damper (5) generates a damping force to block the movement of the pull arm (3), thereby generating a damping effect when the door hinge is opened.

2. The cabinet door hinge with a door opening buffer function according to claim 1, characterized in that: The pull arm (3) and the hinge arm (2) are connected by a connecting rod (6). The head of the connecting rod (6) is hinged to the hinge arm (2), and the tail of the connecting rod (6) is hinged to the pull arm (3) through a first hinge shaft (61). A first sliding groove (12) is provided in the base (1), and the front and rear ends of the first hinge shaft (61) extend into the first sliding groove (12) to slide.

3. A cabinet door hinge with a door opening buffer function according to claim 2, characterized in that: The base (1) is also provided with a second slide groove (13), and the other end of the pull arm (3) is equipped with a second hinge shaft (31). The front and rear ends of the second hinge shaft (31) extend into the second slide groove (13) and slide.

4. A cabinet door hinge with a door opening buffer function according to claim 1, characterized in that: The damper (5) is a compression type hydraulic damper (5). The cylinder part of the damper (5) is connected to the base (1), and the damping rod of the damper (5) is connected to the pull arm (3).

5. A cabinet door hinge with a door opening buffer function according to claim 4, characterized in that: The pull arm (3) is provided with a baffle (32), which presses against the damping rod.

6. A cabinet door hinge with a door opening buffer function according to claim 4, characterized in that: The main body is equipped with a positioning pin (35), which is set at the tail of the cylinder part of the damper (5). The main body is also equipped with a positioning pressure plate (33), which is set at the cylindrical surface of the cylinder part of the damper (5).

7. A cabinet door hinge with a door opening buffer function according to claim 1, characterized in that: The base (1) is also provided with a third slide groove (14), a third hinge shaft (15) is slidably installed in the third slide groove (14), a roller (16) is installed on the third hinge shaft (15), a push spring mechanism is also provided in the base (1), the push spring mechanism pushes the roller (16) to move in the direction of the hinge arm (2), and a locking boss (21) protruding in the direction of the roller (16) is provided on the hinge arm (2).

8. A cabinet door hinge with a door opening buffer function according to claim 7, characterized in that: The spring push mechanism includes a spring push frame (17) and a spring (18) encircling it. One end of the spring push frame (17) is connected to the third hinge shaft (15), and the other end of the spring push frame (17) is inserted into the spring push hole (19) in the base (1). One end of the spring (18) is supported on the spring push hole (19), and the other end is supported on the spring push frame (17).

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