Upturning type door body hinge with random stop function

Abstract

An upturning type door body hinge with a random stop function comprises a driving arm fixedly connected to a door body and a fixing frame fixedly installed on a box body, one end of the fixing frame is rotationally provided with an output shaft, the outer cylindrical surfaces of the two ends of the output shaft are sunken to form an outer connecting table and an inner connecting table respectively, and the outer connecting table and the inner connecting table are connected with the driving arm. One end of the connecting rod is clamped and mounted on the inner connecting table, and the driving arm is clamped and connected to the outer connecting table; the other end of the connecting rod is hinged to a pull arm, the other end of the pull arm is connected with a sliding rod, and the sliding rod is installed in a movable groove formed in the fixing frame in a sliding mode. A spring is arranged between the sliding rod and the fixed frame, when the door body is turned upwards, the connecting rod is driven to swing through the output shaft, the pull arm stretches the spring, and the tension of the spring is balanced with the gravity of the door body, so that the door body can be paused at any position.

Description

Technical Field

[0001] This utility model relates to a door hinge, specifically an upward-opening door hinge with a stop function. Background Technology

[0002] Flip-up doors are widely used in various applications, including residential furniture such as kitchen cabinets and wardrobes. These doors typically use hinges to allow them to flip upwards, providing access to the interior space. Traditional flip-up door hinges usually cannot stop the door at any position; the door can only remain fully open or fully closed, or requires additional auxiliary components to maintain the opening angle. Because of the lack of a stop-and-go function, the door cannot stop at the desired angle, requiring the user to hold the door with one hand while operating items with the other, making operation extremely inconvenient and reducing efficiency. Furthermore, the lack of a stop-and-go function means the door may accidentally close after external force, posing a safety hazard to the user.

[0003] Secondly, existing hinges often lack an effective balancing mechanism to counteract the weight of the door. Since upward-opening doors are subject to gravity during opening and closing, if the hinges do not provide sufficient support or balancing force, users may need to apply considerable force to operate the door smoothly, especially for heavier doors. This imbalance not only increases the difficulty of operation but may also cause the door to close too quickly, posing a risk of pinching or damage. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a simple structure, low manufacturing cost, position-stop function, stable and reliable, convenient operation, and strong durability of an upward-opening door hinge with position-stop function.

[0005] The purpose of this utility model is achieved in the following way: a flip-up door hinge with a stop function, which includes a drive arm fixedly connected to the door body and a fixed frame fixedly installed on the box body. An output shaft is rotatably installed at one end of the fixed frame. The outer cylindrical surfaces at both ends of the output shaft are recessed to form an outer connecting platform and an inner connecting platform, respectively. One end of the connecting rod is clamped and installed on the inner connecting platform, and the drive arm is clamped and connected to the outer connecting platform.

[0006] The other end of the connecting rod is hinged to a pull arm, and the other end of the pull arm is connected to a sliding rod. The sliding rod is slidably installed in the movable groove of the fixed frame. A spring is provided between the sliding rod and the fixed frame. When the door is flipped up, the output shaft drives the connecting rod to swing, the pull arm stretches the spring, and the tension of the spring is balanced with the weight of the door, so that the door can stop at any position.

[0007] The fixed frame has an open space forming a movable groove, in which the connecting rod and pull arm are fitted.

[0008] The cross-sectional shape of the outer connecting platform and the inner connecting platform is elongated.

[0009] The connecting rod is provided with an inner connecting groove, which is similar in shape to the inner connecting platform.

[0010] The drive arm is provided with an external connecting groove, which is similar in shape to the external connecting platform.

[0011] The outer end of the output shaft is provided with an internal threaded hole. The locking screw passes through the outer connecting groove of the drive arm and is screwed into the internal threaded hole, thus connecting the drive arm and the output shaft into one unit.

[0012] The movable groove is a horizontally extending waist-shaped groove.

[0013] A fixing rod is inserted and connected to the tail of the fixing frame. One end of the spring is hooked onto the fixing rod, and the other end is hooked onto the sliding rod.

[0014] The spring in question is a tension spring.

[0015] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness. 2. Utilizing the dynamic balance mechanism of the tension spring and the door's own weight, the tension spring is stretched by the pull arm and the sliding rod slides in the movable groove to adjust the tension, cleverly realizing the pause function at any position, eliminating dependence on external auxiliary devices, simplifying the structure and improving reliability. 3. When the user opens or closes the door, only a small force is needed to realize the door's stop function, significantly reducing the user's operational burden and preventing the door from falling uncontrollably, thus improving operational safety and comfort. 4. The elongated cross-section design of the connecting platform ensures effective force transmission and connection stability, preventing relative rotation between components and avoiding offset or loosening during swinging. 5. Simplified installation process; installers can complete assembly without complex adjustments, improving production and maintenance efficiency. 6. The output shaft extends laterally out of the housing and connects to the door through the drive arm, eliminating the need for a mounting groove for the drive arm in the housing, maintaining the integrity and aesthetics of the housing. Attached Figure Description

[0016] Figure 1 This is a diagram showing the door of this utility model in its open state.

[0017] Figure 2 This is a schematic diagram of the bottom structure of the box in this utility model.

[0018] Figure 3 This is a structural assembly drawing of the box body and the fixing frame in this utility model.

[0019] Figure 4 This is a structural assembly drawing of the drive arm and door body in this utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the fixed frame in this utility model.

[0021] Figure 6 This is a structural assembly drawing of the drive arm and locking screw in this utility model.

[0022] Figure 7 This is a structural assembly drawing of the fixed frame, connecting rod, and pull arm in this utility model.

[0023] Figure 8 This is a structural assembly drawing of the output shaft, connecting rod, and pull arm in this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. A flip-up door hinge with a stop function includes a drive arm 2 fixedly connected to the door body 1 and a fixed frame 3 fixedly installed on the housing 10. An output shaft 4 is rotatably installed at one end of the fixed frame 3. The outer cylindrical surfaces at both ends of the output shaft 4 are respectively recessed to form an outer connecting platform 41 and an inner connecting platform 42. One end of a connecting rod 5 is clamped and installed on the inner connecting platform 42, and the drive arm 2 is clamped and connected to the outer connecting platform 41.

[0025] The other end of the connecting rod 5 is hinged to a pull arm 6, and the other end of the pull arm 6 is connected to a sliding rod 7. The sliding rod 7 is slidably installed in the movable groove 31 of the fixed frame 3. A spring 8 is provided between the sliding rod 7 and the fixed frame 3. When the door 1 is flipped up, the output shaft 4 drives the connecting rod 5 to swing, and the pull arm 6 stretches the spring 8. The tension of the spring 8 is balanced with the weight of the door 1, so that the door 1 can stop at any position.

[0026] The fixed frame 3 has a hollow movable groove 31 in which the connecting rod 5 and the pull arm 6 are embedded.

[0027] The cross-sectional shape of the outer connecting platform 41 and the inner connecting platform 42 is elongated.

[0028] The connecting rod 5 is provided with an inner connecting groove 51, which is similar in shape to the inner connecting platform 42.

[0029] The drive arm 2 is provided with an external connecting groove 21, which is similar in shape to the external connecting platform 41.

[0030] The outer end of the output shaft 4 is provided with an internal threaded hole 43. The locking screw 44 passes through the outer connecting groove 21 of the drive arm 2 and is screwed into the internal threaded hole 43, thereby connecting the drive arm 2 and the output shaft 4 into one unit.

[0031] The movable groove 31 is a horizontally extending waist-shaped groove.

[0032] A fixing rod 71 is inserted and connected to the tail of the fixing frame 3. One end of the spring 8 is hooked on the fixing rod 71, and the other end is hooked on the sliding rod 7.

[0033] The spring 8 mentioned is a tension spring.

[0034] Working principle: A drive arm is fixedly connected to the door, and a fixed frame is fixedly installed on the housing. An output shaft is rotatably mounted at one end of the fixed frame. An outer connecting platform and an inner connecting platform are recessed on the outer cylindrical surfaces at both ends of the output shaft, respectively. The drive arm is clamped and connected to the outer connecting platform, while the connecting rod is clamped and connected to the inner connecting platform. The output shaft extends laterally out of the housing, connecting to the door with the drive arm outside the housing. This avoids creating a mounting slot within the housing body for the drive arm, ensuring the integrity of the housing and maintaining the overall aesthetic appearance of the housing and door.

[0035] As the door flips upward, the drive arm moves synchronously with the door, driving the output shaft to rotate. The output shaft can accurately transmit this rotational force to the internal connecting rod.

[0036] The inner and outer connecting platforms have elongated cross-sectional shapes. Inner and outer connecting slots are threaded through the connecting rod and drive arm, their shapes similar to the connecting platforms, providing anti-slip locking. When the output shaft rotates, the inner connecting platform drives the connecting rod to swing. The connecting rod is fixed to the inner connecting platform with bolts. The elongated cross-section design ensures effective force transmission and connection stability, preventing relative rotation between components and avoiding offset or loosening during swinging.

[0037] A pull arm is hinged to the other end of the connecting rod, and a sliding rod is connected to the other end of the pull arm. A spring is installed between the sliding rod and the fixed frame. During the swinging of the connecting rod, the pull arm moves, guided by the cooperation of the sliding rod and the movable groove. The pull arm pulls the sliding rod along the movable groove. The design of the movable groove allows the sliding rod to move only horizontally, while also limiting its vertical offset, ensuring the smooth movement trajectory of each component during the overall upward flipping process. Secondly, the sliding rod slides in the laterally extending waist-shaped groove, reducing frictional stress, lowering the fatigue risk of critical components, allowing the hinge to withstand long-term use without damage, significantly reducing maintenance costs, and improving overall reliability.

[0038] As the sliding rod slides, it stretches a spring, similar to a tension spring, with the tension gradually increasing. As the door's opening angle changes, the tension of the tension spring dynamically adjusts continuously, eventually reaching a state of equilibrium with the weight of the door. At this point, the net force on the door is zero, and the door can stably stop at any position without additional external support. When the user presses down to close the door, the drive arm rotates in the opposite direction, and each component moves in the opposite direction in sequence. The tension of the tension spring gradually decreases, and the door closes smoothly under gravity.

[0039] By utilizing the dynamic balance mechanism of the tension spring's force and the door's own weight, the tension is adjusted by extending the spring via a pull arm and allowing a sliding rod to slide within a movable groove. This ingenious design achieves a pause function at any position, eliminating reliance on external auxiliary devices, simplifying the structure, and improving reliability. It is particularly suitable for scenarios requiring frequent adjustments to the door's angle. Users only need to apply a small amount of force when opening or closing the door to achieve the door's automatic stop function, significantly reducing the user's operational burden and preventing the door from falling uncontrollably, thus enhancing operational safety and comfort.

[0040] Furthermore, by utilizing the internal threaded hole on the outer end of the output shaft, the locking screw passes through the outer connecting groove of the drive arm and is screwed into the internal threaded hole, thereby connecting the drive arm and the output shaft as one unit. This simplifies the installation process, and installers can complete the assembly without complicated adjustments, improving production and maintenance efficiency. Therefore, it can be widely promoted.

[0041] 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 flip-up door hinge with a stop-and-go function, characterized in that: It includes a drive arm (2) fixedly connected to the door body (1) and a fixed frame (3) fixedly installed on the box body (10). An output shaft (4) is rotatably installed at one end of the fixed frame (3). The outer cylindrical surfaces at both ends of the output shaft (4) are recessed to form an outer connecting platform (41) and an inner connecting platform (42). One end of the connecting rod (5) is clamped and installed on the inner connecting platform (42), and the drive arm (2) is clamped and connected to the outer connecting platform (41). The other end of the connecting rod (5) is hinged to a pull arm (6), and the other end of the pull arm (6) is connected to a sliding rod (7). The sliding rod (7) is slidably installed in the movable groove (31) of the fixed frame (3). A spring (8) is provided between the sliding rod (7) and the fixed frame (3). When the door (1) is flipped up, the connecting rod (5) is driven to swing through the output shaft (4), and the pull arm (6) stretches the spring (8). The tension of the spring (8) is balanced with the gravity of the door (1), so that the door (1) can be paused at any position.

2. The upward-opening door hinge with stop function according to claim 1, characterized in that: The fixed frame (3) is hollow to form a movable groove (31), in which the connecting rod (5) and the pull arm (6) are embedded.

3. A flip-up door hinge with a stop-and-go function according to claim 1, characterized in that: The cross-sectional shape of the outer connecting platform (41) and the inner connecting platform (42) is long waist-shaped.

4. A flip-up door hinge with a stop-and-go function according to claim 3, characterized in that: The connecting rod (5) is provided with an inner connecting groove (51) through it, and the inner connecting groove (51) is similar in shape to the inner connecting platform (42).

5. A flip-up door hinge with a stop-and-go function according to claim 3, characterized in that: The drive arm (2) is provided with an external connecting groove (21) through it, and the external connecting groove (21) is similar in shape to the external connecting platform (41).

6. A flip-up door hinge with a stop-and-go function according to claim 5, characterized in that: The outer end of the output shaft (4) is provided with an internal threaded hole (43). The locking screw (44) passes through the outer connecting groove (21) of the drive arm (2) and is screwed into the internal threaded hole (43) to connect the drive arm (2) and the output shaft (4) into one unit.

7. A flip-up door hinge with a stop-and-go function according to claim 1, characterized in that: The movable groove (31) is a horizontally extending waist-shaped groove.

8. A flip-up door hinge with a stop-and-go function according to claim 1, characterized in that: A fixing rod (71) is inserted and connected to the tail of the fixing frame (3). One end of the spring (8) is hooked on the fixing rod (71), and the other end is hooked on the sliding rod (7).

9. A flip-up door hinge with a stop-and-go function according to claim 8, characterized in that: The spring (8) is a tension spring.

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