Hardware hinge

Abstract

The utility model relates to a hardware hinge, including hinge cup, upper connecting piece, lower connecting piece, hinge arm, torsional spring and buffer assembly, upper connecting piece, lower connecting piece are hinged between hinge cup and hinge arm respectively, and the hinge four bar mechanism is formed between hinge cup, upper connecting piece, lower connecting piece and hinge arm, and upper connecting piece is rotatively connected with hinge arm through first pin shaft, and torsional spring is sleeved on first pin shaft, and torsional spring includes at least two torsional rods, and two torsional rods are elastically abutted between lower connecting piece and hinge arm respectively, and buffer assembly is fixedly connected in hinge arm, and the output end of buffer assembly is abutted with one end of lower connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of hardware, specifically to a hardware hinge. Background Technology

[0002] As a core component connecting the cabinet body and cabinet doors, the core function of hardware hinges is to enable smooth and stable opening and closing of the cabinet doors, and to bear the entire weight of the cabinet doors and the load from frequent operation. Early hinge products were mostly exposed hinges, with simple structures but limited load-bearing capacity and durability, and lacking aesthetic appeal. With modern homes pursuing both functionality and aesthetics, concealed hinges have become mainstream. Their key design features are multi-link mechanisms or torque spring systems, enabling controllable damped movement of the cabinet door during opening, allowing it to hover at any angle, and achieving a smooth closing effect. Simultaneously, they require high fatigue resistance to cope with loosening, abnormal noise, or deformation caused by long-term frequent opening and closing. Continuous research and innovation in hardware hinges requires constant optimization of the hinge structure based on user experience, refining details to provide a better user experience. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a hardware hinge with a four-bar linkage that is smoother during movement and uses a more linear force when opening and closing cabinet doors, providing users with a better experience.

[0004] The technical solution of this utility model is as follows: a hardware hinge, including a hinge cup, an upper connecting piece, a lower connecting piece, a hinge arm, a torsion spring, and a buffer assembly. The upper connecting piece and the lower connecting piece are respectively hinged between the hinge cup and the hinge arm, forming a four-bar linkage mechanism. The upper connecting piece is rotatably connected to the hinge arm through a first pin. The torsion spring is sleeved on the first pin and includes at least two torsion bars. The two torsion bars elastically abut against the lower connecting piece and the hinge arm respectively. The buffer assembly is fixedly connected inside the hinge arm, and the output end of the buffer assembly abuts against one end of the lower connecting piece.

[0005] Furthermore, the hinged cup is provided with a side-opening cup groove, and the upper connecting piece and the lower connecting piece are respectively hinged in the cup groove. The hinge point between the lower connecting piece and the cup groove is located at the top of the side-opening position of the cup groove, and the hinge point between the upper connecting piece and the cup groove is located at the bottom of the middle of the cup groove. The upper connecting piece and the lower connecting piece can abut against each other vertically. The upper connecting piece, the lower connecting piece and one end of the hinge arm can swing and snap into the cup groove, and the upper connecting piece can abut against the bottom of the cup groove.

[0006] Furthermore, the upper connecting piece and the lower connecting piece are simultaneously hinged in the cup groove by a U-shaped pin.

[0007] Furthermore, a first notch is provided at the bottom of the cup groove where the U-shaped pin is located.

[0008] Furthermore, the upper end of the hinge cup is provided with a first platform extending to both sides, and the first platform is symmetrically provided with first countersunk holes.

[0009] Furthermore, the upper end of the hinge cup is provided with a second platform extending to both sides. The second platform is a symmetrical fan-shaped structure that extends from the position of the cup groove to the side of the first platform.

[0010] Furthermore, the second platform is lowered to the side of the first platform.

[0011] Furthermore, one end of the upper connecting piece partially covers the outside of the torsion spring.

[0012] Furthermore, the lower end of the hinge arm is a transversely through arm groove, the upper end of the buffer assembly abuts against the top of the arm groove, and the middle part of the buffer assembly is fixedly connected to the arm groove by a pin.

[0013] Furthermore, the lower connecting piece is rotatably connected to the hinge arm via a second pin, and a semi-circular groove is provided at one end of the buffer assembly. The second pin moves within the semi-circular groove, and there is a gap between the second pin and the semi-circular groove.

[0014] Furthermore, the buffer assembly includes a mounting component, a transmission component, and a hydraulic cylinder. The upper end of the mounting component abuts against the top of the arm groove, and the middle part of the mounting component is fixedly connected to the arm groove by a pin. The semi-circular groove is located at one end of the mounting component. The hydraulic cylinder is fixedly connected to the mounting component, and the output end of the hydraulic cylinder is connected to the transmission component. The transmission component abuts against one end of the lower connecting piece.

[0015] Furthermore, the transmission component has side wings on both sides, which abut against one end of the lower connecting piece. One end of the lower connecting piece has a protruding hook-shaped structure that can swing upward and hook the side wings.

[0016] Furthermore, it also includes a base, the upper end of which is fixedly connected to the arm groove by screws, and the lower end of the base is provided with a third platform extending to both sides, with second countersunk holes symmetrically provided on the third platform.

[0017] Furthermore, the third platform is symmetrically provided with first adjustment grooves.

[0018] Furthermore, the upper end of the hinge arm is provided with a first positioning hole and a second adjustment groove, and the upper end of the base is provided with a second positioning hole and a third adjustment groove. The screws respectively fix the upper end of the base to the arm groove through the first positioning hole and the third adjustment groove, the second positioning hole and the second adjustment groove.

[0019] Furthermore, a second notch is provided on the hinge arm at the location of the third adjustment groove.

[0020] Compared with the prior art, the advantages of this utility model are as follows: Through the degree of freedom provided by the four-bar linkage, the hinge cup can drive the cabinet door to swing open and close. When the cabinet door is closed, the hinge cup swings to a position that is nearly perpendicular to the hinge arm, ensuring that the cabinet door is completely closed; the first torsion bar of the torsion spring is symmetrically arranged at both ends and elastically abuts against the hinge arm upward, and the second torsion bar is located in the middle and elastically abuts against one end of the lower connecting piece downward, making the cabinet door easier and smoother to open and close; the buffer component makes the four-bar linkage smoother during the movement, and the force used in the opening and closing of the cabinet door is more linear, bringing a better experience to the user. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0023] Figure 2 This is a structural diagram of the back of the present invention;

[0024] Figure 3 This is a schematic diagram of the structural principle of this utility model;

[0025] Figure 4 This is a diagram showing the combined state of the connecting piece and the torsion spring of this utility model;

[0026] Figure 5 This is a schematic diagram showing the positions of the lower connecting piece and the buffer assembly of this utility model;

[0027] Figure 6 This is an exploded view of the lower connecting piece and buffer assembly of this utility model;

[0028] Figure 7 This is a diagram showing the usage state of this utility model.

[0029] The components are as follows: 1. Hinge cup; 101. Cup groove; 102. First platform; 103. First countersunk hole; 104. Second platform; 105. First notch; 2. Upper connecting piece; 3. Lower connecting piece; 301. Hook-shaped structure; 4. Hinge arm; 401. Arm groove; 402. First positioning hole; 403. Second adjustment groove; 404. Second notch; 5. Torsion spring; 6. Buffer assembly; 601. Mounting component; 602. Transmission component; 603. Side wing; 604. Hydraulic cylinder; 605. Semicircular groove; 7. Base; 701. Second positioning hole; 702. Third adjustment groove; 703. Second countersunk hole; 704. First adjustment groove; 8. Screw; 9. U-shaped pin; 10. First pin; 11. Second pin; 12. Insert pin. Detailed Implementation

[0030] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] like Figure 1-7 As shown, a hardware hinge includes a hinge cup 1, an upper connecting piece 2, a lower connecting piece 3, a hinge arm 4, a torsion spring 5, and a buffer assembly 6. The upper connecting piece 2 and the lower connecting piece 3 are respectively hinged between the hinge cup 1 and the hinge arm 4, forming a four-bar linkage. The upper connecting piece 2 is rotatably connected to the hinge arm 4 via a first pin 10. The torsion spring 5 is sleeved on the first pin 10 and includes at least two torsion bars, which elastically abut against the lower connecting piece 3 and the hinge arm 4. The buffer assembly 6 is fixedly connected inside the hinge arm 4, and its output end abuts against one end of the lower connecting piece 3. The hinge arm 4 is fixedly connected to the cabinet body, and the hinge cup 1 is fixedly connected to the cabinet door. Through the degrees of freedom provided by the four-bar linkage, the hinge cup 1 can drive the cabinet door to swing open and close. When the cabinet door is closed, the hinge cup 1 swings to a position that is nearly perpendicular to the hinge arm 4, ensuring that the cabinet door is completely closed. The torsion spring 5 can be a symmetrical torsion spring 5, with the first torsion bar symmetrically arranged at both ends and elastically abutting the hinge arm 4 upwards, and the second torsion bar located in the middle and elastically abutting one end of the lower connecting piece 3 downwards. The first torsion bar and the second torsion bar form an angle of about 45-60° in the relaxed state, and an angle of about 30-35° when elastically abutting between the lower connecting piece 3 and the hinge arm 4, ensuring that the torque provided by the torsion spring 5 is appropriate, thereby ensuring that the resistance of the four-bar linkage mechanism is not too large when it moves, making the opening and closing of the cabinet door easier and smoother. The addition of the buffer component 6 makes the four-bar linkage mechanism move more smoothly during the movement, and the force used in the opening and closing of the cabinet door is more linear, bringing a better experience to the user.

[0032] In the above embodiment, the hinged cup 1 is provided with a side-opening cup groove 101. The upper connecting piece 2 and the lower connecting piece 3 are respectively hinged in the cup groove 101. The hinge point between the lower connecting piece 3 and the cup groove 101 is located at the top of the side-opening position of the cup groove 101, and the hinge point between the upper connecting piece 2 and the cup groove 101 is located at the bottom of the middle of the cup groove 101. The upper connecting piece 2 and the lower connecting piece 3 can abut against each other vertically. One end of the upper connecting piece 2, the lower connecting piece 3, and the hinge arm 4 can swing and snap into the cup groove 101. The upper connecting piece 2 can abut against the bottom of the cup groove 101. The cup groove 101 provides concealed storage space for the upper connecting piece 2, lower connecting piece 3, and hinge arm 4 when the cabinet door is closed. This avoids interference between structural components and provides greater room for movement for the four-bar linkage. When the upper connecting piece 2 and lower connecting piece 3 abut against each other, the cabinet door reaches its limit position in the open state. When the upper connecting piece 2 abuts against the bottom of the cup groove 101, the cabinet door reaches its limit position in the closed state. Through mutual restraint, a cabinet door opening and closing range of approximately 90° is formed, ensuring stable and reliable opening and closing of the cabinet door. The upper connecting piece 2 and lower connecting piece 3 are simultaneously hinged to the cup groove 101 by a U-shaped pin 9. The U-shaped pin 9 is installed in one step, which is convenient and quick. Furthermore, both ends of the U-shaped pin 9 are subjected to force simultaneously during hinge. Under the influence of their interaction force, the U-shaped pin 9 is not easy to come out of the two hinge points. The structure of the U-shaped pin 9 ensures a stable connection after installation. The bottom of the cup groove 101 where the U-shaped pin 9 is located is provided with a first notch 105. When installing the U-shaped pin 9, the first notch 105 can be used for observation, so that the two ends of the U-shaped pin 9 can accurately pass through the holes used for hinge.

[0033] The hinge cup 1 has a first platform 102 extending to both sides at its upper end. The first platform 102 has symmetrically arranged first countersunk holes 103. The back of the first platform 102 can be attached to the cabinet door surface, and the hinge cup 1 can be installed and fixed through the first countersunk holes 103. The hinge cup 1 also has a second platform 104 extending to both sides at its upper end. The second platform 104 is a symmetrical fan-shaped structure, extending from the side opening of the cup groove 101 to the side of the first platform 102. The fan-shaped structure strengthens the structural strength at this location, preventing the hinge cup 1 from deforming after repeated opening and closing of the cabinet door. This design prevents deformation and cracking. The smooth outer edge of the fan-shaped structure reduces the risk of injury to operators during hinge installation and prevents scratches from the hinge during cabinet door use. The second platform 104 is recessed to the side of the first platform 102. The back of the first platform 102 has a pull-out structure, with its lower end flush with the lower end of the second platform 104. This ensures uniform wall thickness throughout the hinge and guarantees that the bottoms of both the first and second platforms 102 are flat and fully adhere to the cabinet door surface, ensuring a sufficiently secure and stable hinge after installation. One end of the upper connecting piece 2 partially covers the outside of the torsion spring 5, preventing the torsion spring 5 from being exposed and effectively reducing dust entry into the hinge. This ensures the long-lasting effectiveness of the lubricating oil within the hinge and also contributes to its aesthetic appeal. The lower end of the hinge arm 4 is a transversely through arm groove 401. The upper end of the buffer assembly 6 abuts against the top of the arm groove 401, and the middle part of the buffer assembly 6 is fixedly connected to the arm groove 401 by a pin 12. After pre-assembly, the buffer assembly 6 is embedded into the arm groove 401 as a whole, and can be quickly installed and positioned by the pin 12. After the upper end face of the buffer assembly 6 abuts against the top of the arm groove 401, the rotation of the buffer assembly 6 is restricted, thereby fixing the entire buffer assembly 6. The lower connecting piece 3 is rotatably connected to the hinge arm 4 by a second pin 11. One end of the buffer assembly 6 is provided with a semi-circular groove 605, and the second pin 11 moves in the semi-circular groove 605. There is a gap between the second pin 11 and the semi-circular groove 605. The semi-circular groove 605 can provide auxiliary positioning during the installation of the buffer assembly 6, and can also act as a protective barrier during the use of the hinge. After the buffer assembly 6 reaches the end of its lifespan, if it deforms or cracks, the semi-circular groove 605 can abut against the second pin 11 to ensure the continued use of the hinge.

[0034] The buffer assembly 6 includes a mounting component 601, a transmission component 602, and a hydraulic cylinder 604. The upper end of the mounting component 601 abuts against the top of the arm groove 401, and the middle part of the mounting component 601 is fixedly connected to the arm groove 401 by a pin 12. The semi-circular groove 605 is located at one end of the mounting component 601. The hydraulic cylinder 604 is fixedly connected to the mounting component 601, and the output end of the hydraulic cylinder 604 is connected to the transmission component 602. The transmission component 602 abuts against one end of the lower connecting piece 3. The mounting component 601 is an injection-molded part, which serves as a fixed connection and is made of plastic to reduce production costs. The transmission component 602 is a metal product, which serves to transmit force and requires good strength and other mechanical properties.

[0035] The hydraulic cylinder 604 is a commonly used buffer component in hinges and belongs to existing technology. The hydraulic cylinder 604 provides stable support for the transmission component 602, making the mutual pushing between one end of the lower connecting piece 3 and the transmission component 602 smoother, thus making the cabinet door open and close more smoothly. The transmission component 602 has side wings 603 on both sides, which abut against one end of the lower connecting piece 3. One end of the lower connecting piece 3 has a protruding hook-like structure 301, which can swing upwards and hook onto the side wings 603. The side wings 603 provide a sufficient force-bearing area for the abutment of the lower connecting piece 3, and at the same time provide a force-bearing point for the hook-like structure 301, ensuring that the lower connecting piece 3 reciprocates stably in the four-bar linkage.

[0036] The hardware hinge also includes a base 7, the upper end of which is fixedly connected to the arm groove 401 by screws 8. The lower end of the base 7 has a third platform extending to both sides, and the third platform has symmetrically provided second countersunk holes 703 for easy connection and fixation with the cabinet. The third platform has symmetrically provided first adjustment grooves 704, which can be adjusted up and down in the cabinet. The upper end of the hinge arm 4 has a first positioning hole 402 and a second adjustment groove 403, and the upper end of the base 7 has a second positioning hole 701 and a third adjustment groove 702. The screws 8 fix the upper end of the base 7 to the arm groove 401 through the first positioning hole 402 and the third adjustment groove 702, the second positioning hole 701 and the second adjustment groove 403, respectively. Through the second adjustment groove 403 and the third adjustment groove 702, the lateral position of the hinge in the cabinet can be adjusted, thereby adjusting the opening and closing effect of the cabinet door, so that the cabinet door will not be stuck when opened, and the fit and integration with the cabinet when closed is better. The hinge arm 4 at the location of the third adjustment groove 702 is provided with a second notch 404, through which the position of the base 7 in the arm groove 401 can be observed and adjusted.

[0037] Description of the working principle of this utility model:

[0038] After assembling the hardware hinges, pre-install and fix the base 7 at the marked or reserved position inside the cabinet. After pre-installation, connect and fix the cabinet door through the hinge cup 1. At this time, open and close the cabinet door to test the smoothness of the door and the integrity of the cabinet after closing. Then, adjust the height of the cabinet door through the first adjustment groove 704, and adjust the distance between the cabinet door and the cabinet body through the second adjustment groove 403 and the third adjustment groove 702 to obtain a better opening and closing effect. After the cabinet door is in the correct position, finally fix the hinges with the locking screws 8.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A metal hinge, comprising a hinge cup, an upper connecting piece, a lower connecting piece, a hinge arm, a torsion spring, and a buffer assembly, characterized in that: The upper connecting piece and the lower connecting piece are respectively hinged between the hinge cup and the hinge arm. The hinge cup, the upper connecting piece, the lower connecting piece and the hinge arm form a four-bar linkage. The upper connecting piece is rotatably connected to the hinge arm through the first pin. The torsion spring is sleeved on the first pin. The torsion spring includes at least two torsion bars. The two torsion bars elastically abut against the lower connecting piece and the hinge arm respectively. The buffer assembly is fixedly connected inside the hinge arm. The output end of the buffer assembly abuts against one end of the lower connecting piece.

2. The hardware hinge according to claim 1, characterized in that: The hinge cup has a side-opening cup groove. The upper connecting piece and the lower connecting piece are respectively hinged in the cup groove. The hinge point between the lower connecting piece and the cup groove is located at the top of the side-opening position of the cup groove, and the hinge point between the upper connecting piece and the cup groove is located at the bottom of the middle of the cup groove. The upper connecting piece and the lower connecting piece can abut against each other vertically. The upper connecting piece, the lower connecting piece and one end of the hinge arm can swing and snap into the cup groove. The upper connecting piece can abut against the bottom of the cup groove.

3. The hardware hinge according to claim 2, characterized in that: The upper connecting piece and the lower connecting piece are simultaneously hinged in the cup groove by a U-shaped pin, and a first notch is provided at the bottom of the cup groove where the U-shaped pin is located.

4. The hardware hinge according to claim 2, characterized in that: The upper end of the hinge cup is provided with a first platform extending to both sides, and the first platform is provided with a first countersunk hole symmetrically. The upper end of the hinge cup is provided with a second platform extending to both sides. The second platform is a symmetrical fan-shaped structure, which extends from the position of the cup groove to the side of the first platform. The second platform is recessed to the side of the first platform.

5. The hardware hinge according to claim 1, characterized in that: One end of the upper connecting piece is partially covered by the outside of the torsion spring.

6. The hardware hinge according to claim 1, characterized in that: The lower end of the hinge arm is a transverse through-groove. The upper end of the buffer assembly abuts against the top of the arm groove. The middle part of the buffer assembly is fixedly connected to the arm groove by a pin. The lower connecting piece is rotatably connected to the hinge arm by a second pin. One end of the buffer assembly is provided with a semi-circular groove. The second pin moves in the semi-circular groove, and there is a gap between the second pin and the semi-circular groove.

7. The hardware hinge according to claim 6, characterized in that: The buffer assembly includes a mounting component, a transmission component, and a hydraulic cylinder. The upper end of the mounting component abuts against the top of the arm groove, and the middle part of the mounting component is fixedly connected to the arm groove by a pin. The semi-circular groove is located at one end of the mounting component. The hydraulic cylinder is fixedly connected to the mounting component, and the output end of the hydraulic cylinder is connected to the transmission component. The transmission component abuts against one end of the lower connecting piece.

8. The hardware hinge according to claim 6, characterized in that: It also includes a base, the upper end of which is fixedly connected to the arm groove by screws, and the lower end of the base is provided with a third platform extending to both sides, with second countersunk holes symmetrically provided on the third platform.

9. The hardware hinge according to claim 7, characterized in that: The transmission component has side wings on both sides, which abut against one end of the lower connecting piece. One end of the lower connecting piece has a protruding hook-shaped structure that can swing upward and hook the side wings.

10. The hardware hinge according to claim 8, characterized in that: The third platform is symmetrically provided with a first adjustment groove, the upper end of the hinge arm is provided with a first positioning hole and a second adjustment groove, the upper end of the base is provided with a second positioning hole and a third adjustment groove, the screws respectively fix the upper end of the base to the arm groove through the first positioning hole and the third adjustment groove, the second positioning hole and the second adjustment groove, and the hinge arm at the position of the third adjustment groove is provided with a second notch.

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