A box door hinge with door opening pause function

Abstract

The utility model relates to a box door hinge with door opening pause function, which comprises a hinge arm and a trigger, a containing cavity is arranged in the hinge arm, a pull arm is installed in the containing cavity, the front end of the pull arm is hinged with the trigger, a first pin shaft is arranged in the containing cavity, one end of a first tension spring is hung on the first pin shaft, the other end of the first tension spring is hung on the pull arm, the pulling force generated by the first tension spring always swings the trigger in the closing direction through the pull arm; a second tension spring is installed in the containing cavity, a third pin shaft is arranged on the hinge arm, one end of the second tension spring is hung on the third pin shaft, and the other end is hung on a second pin shaft; a first guide groove is arranged on the hinge arm, a second guide groove is arranged on the pull arm, and the second pin shaft is inserted into the first guide groove and the second guide groove; when the hinge is opened to a set angle, the second guide groove contacts with the second pin shaft to pull the second tension spring to move.

Description

Technical Field

[0001] This utility model relates to the field of hardware hinge technology, specifically a box door hinge with a door opening and stopping function. Background Technology

[0002] Hinges, as a common connecting and rotating device, are widely used in various doors, windows, covers, and other structures, with cabinet door hinges being particularly indispensable in furniture and equipment enclosures. However, existing cabinet door hinges often have some shortcomings in practical use.

[0003] Currently, the most common cabinet door hinges on the market can be roughly divided into the following two categories: One type is the ordinary cabinet door hinge, whose structural design typically allows the cabinet door to swing directly to its maximum opening angle when opened, lacking an effective stopping or damping mechanism during this process. When this type of cabinet door is opened, if the user does not apply external force to control it in time, the door will often open rapidly due to inertia or its own weight, until it reaches its maximum opening or collides with adjacent objects. For example, if there is a table or other items under the cabinet door, the door is very likely to hit the table when fully opened, which may not only damage the cabinet door or table, but also generate noise and cause inconvenience to the user.

[0004] Another common type of cabinet door hinge is the automatic return hinge, which typically features a return spring or other elastic element. When the cabinet door is opened, if it is not forced open to its maximum open position (e.g., secured by a snap-fit ​​or magnetic closure), the return spring will automatically spring back towards the closing position, causing the door to automatically close. While this design facilitates automatic door closure, in some scenarios, users may require the door to remain partially open at a certain angle for easy access to items, ventilation, or temporary storage. However, hinges with return springs cannot meet this need; the door will automatically close under the spring's action once it is not fully opened, lacking the ability to pause at a specific half-open position.

[0005] In summary, existing cabinet door hinges have significant shortcomings in terms of convenience, security, and user experience. The main issue is the lack of a stopping point at a specific half-open angle, which greatly limits their functionality and user-friendliness in practical applications. Therefore, further improvements are necessary. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a door hinge with a simple structure, low manufacturing cost, and the ability to stably stop the door in a half-open state.

[0007] The purpose of this utility model is achieved in the following way: a box door hinge with a door opening and stopping function, which includes a hinge arm fixed on the box body and a trigger fixed on the box door. The trigger is hinged to the hinge arm through a hinge shaft. The trigger rotates around the center of the hinge shaft to realize the opening and closing of the box door. The hinge arm is provided with a receiving cavity, and a pull arm is installed in the receiving cavity. The front end of the pull arm is hinged to the trigger. A first pin is also provided in the receiving cavity. One end of the first tension spring is hooked on the first pin, and the other end of the first tension spring is hooked on the pull arm. The tension generated by the first tension spring pulls the trigger through the pull arm to swing in the closing direction. A second tension spring is also installed inside the accommodating cavity, and a third pin is also provided on the hinge arm. One end of the second tension spring is hooked onto the third pin, and the other end is hooked onto the second pin. The hinge arm is provided with a first guide groove, and the pull arm is provided with a second guide groove. The second pin is inserted into the first guide groove and the second guide groove. When the hinge is opened to a set angle, the second guide groove contacts the second pin, which pulls the second tension spring to move.

[0008] Furthermore, the pull arm is also provided with a third guide groove, and the first pin is inserted into the first guide groove and the third guide groove.

[0009] Furthermore, the pull arm is provided with a mounting cavity, and the first tension spring is installed in the mounting cavity.

[0010] Furthermore: the trigger and the pull arm are connected by a connecting rod, one end of the connecting rod is hinged to the trigger, and the other end of the connecting rod is hinged to the pull arm by a fourth hinge shaft. The hinge arm is also provided with a fourth guide groove, and the fourth hinge shaft is slidably installed in the fourth guide groove.

[0011] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0012] 2. During the first half of the hinge's opening stroke, when the door opening angle is less than the set angle, the first tension spring is mainly under pressure within the accommodating cavity and acts on the pull arm. The pull arm then pulls the trigger, causing it to swing continuously in the closing direction. This invention, through a rational design of the first tension spring's elasticity, ensures that the tension it generates is less than the door's own gravitational torque. This guarantees that the door can be opened freely and smoothly without any additional resistance or automatic rebound force, greatly improving the smoothness of opening the door.

[0013] 3. As the opening angle of the cabinet door gradually increases and exceeds the preset angle, the first and second tension springs will simultaneously generate force. Through precise design of the elasticity of the first and second tension springs, the total tension generated by both is greater than or at least equal to the gravitational torque of the cabinet door at the corresponding opening angle. This ingenious balance between elasticity and gravitational torque allows the cabinet door to stably stop at any half-open position after reaching the preset angle, without continuing to fall due to gravity or automatically closing due to the restoring force.

[0014] 4. Given that the door hinge provided by this utility model can stop freely at any half-open angle, users can stop the door at a suitable angle according to actual needs. Especially when there is a table, wall or other objects below or near the door, it can effectively avoid the impact that may occur when the door is fully opened, thereby protecting the door, furniture and surrounding items from damage, reducing noise and significantly improving the safety of use.

[0015] 5. This utility model endows the cabinet door with the characteristic of "stopping and opening at will," eliminating the need for users to support the door throughout the process and eliminating concerns about the door closing automatically or being accidentally bumped. This provides great convenience for retrieving and placing items, ventilating, or keeping the door temporarily open, meeting the needs of modern home and equipment design for humanized and intelligent functions. Attached Figure Description

[0016] Figure 1 This is a rendering of the hinge of this utility model in the closed state.

[0017] Figure 2 This is a rendering of the hinge of this utility model in the open state.

[0018] Figure 3 This is an exploded view of the hinge of this utility model in the closed state.

[0019] Figure 4 This is an exploded view of the hinge of this utility model in a semi-open state.

[0020] Figure 5 This is an exploded view of the hinge of this utility model in the open state.

[0021] Explanation of reference numerals in the attached drawings: 1. Hinge arm; 10. Connecting rod; 11. Receiving cavity; 12. First guide groove; 13. Fourth hinge pin; 14. Fourth guide groove; 2. Trigger; 3. Hinge shaft; 4. Pull arm; 41. Second guide groove; 43. Third guide groove; 44. Mounting cavity; 5. First pin; 6. First tension spring; 7. Second tension spring; 8. Second pin; 9. Third pin. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings. A door hinge with a door opening and stopping function includes a hinge arm 1 fixed on the box body and a trigger 2 fixed on the door. The trigger 2 is hinged to the hinge arm 1 via a hinge shaft 3. The trigger 2 rotates around the center of the hinge shaft 3 to realize the opening and closing of the door. The hinge arm 1 is provided with a receiving cavity 11. A pull arm 4 is installed in the receiving cavity 11. The front end of the pull arm 4 is hinged to the trigger 2. A first pin 5 is also provided in the receiving cavity 11. One end of a first tension spring 6 is hooked on the first pin 5, and the other end of the first tension spring 6 is hooked on the pull arm 4. The tension generated by the first tension spring 6 pulls the trigger 2 through the pull arm 4 to swing in the closing direction. A second tension spring 7 is also installed in the cavity 11, and a third pin 9 is also provided on the hinge arm 1. One end of the second tension spring 7 is hooked onto the third pin 9, and the other end is hooked onto the second pin 8. The hinge arm 1 is provided with a first guide groove 12, and the pull arm 4 is provided with a second guide groove 41. The second pin 8 is inserted into the first guide groove 12 and the second guide groove 41. When the hinge is opened to a set angle, the second guide groove 41 contacts the second pin 8, which pulls the second tension spring 7 to move.

[0023] In this embodiment: when the door is opened, the pull arm 4 will rotate accordingly, causing the first tension spring 6 to be stretched, generating a continuous pulling force, which acts on the trigger 2 through the pull arm 4, causing the trigger 2 to always tend to swing in the closing direction.

[0024] In the initial stage of opening the door, the second tension spring 7 may not be under force. As the opening angle of the door gradually increases and reaches the set angle, the second guide groove 41 on the pull arm 4 will contact the second pin 8. Since the second pin 8 is simultaneously confined within the first guide groove 12, this contact and relative movement will drive the second pin 8 to move, thereby stretching the second tension spring 7 and generating elastic force.

[0025] In this embodiment, the first tension spring 6 is provided so that the door tends to return to the closing direction when it is not subjected to external force, which avoids the shaking of the door when it is in a certain intermediate position and increases the stability of the structure.

[0026] By introducing the second tension spring 7 in conjunction with the first guide groove 12, the second guide groove 41 and the second pin 8, the second tension spring 7 is triggered to bear force at a specific opening angle, laying the foundation for providing a pause function for the door during opening.

[0027] In one embodiment: the pull arm 4 is further provided with a third guide groove 43, and the first pin 5 is inserted into the first guide groove 12 and the third guide groove 43.

[0028] In this embodiment: by constraining the first pin 5 through the first guide groove 12 and the third guide groove 43, the point of action of the first tension spring 6 and the movement trajectory of the pull arm 4 can be controlled more precisely, ensuring that the first tension spring 6 is subjected to uniform force during the stretching process and avoiding jamming or deviation.

[0029] In one embodiment: the pull arm 4 is provided with a mounting cavity 44, and the first tension spring 6 is installed in the mounting cavity 44.

[0030] In this embodiment, the first tension spring 6 is built into the mounting cavity 44, making the entire hinge structure more integrated, and the spring is not visible from the outside, thus improving the overall aesthetics of the product.

[0031] In one embodiment: the trigger 2 and the pull arm 4 are connected by a connecting rod 10. One end of the connecting rod 10 is hinged to the trigger 2, and the other end of the connecting rod 10 is hinged to the pull arm 4 by a fourth hinge shaft 13. The hinge arm 1 is also provided with a fourth guide groove 14, and the fourth hinge shaft 13 is slidably installed in the fourth guide groove 14.

[0032] In this embodiment, by introducing the connecting rod 10, the relative motion between the trigger 2 and the pull arm 4 is no longer a simple rotation around the hinge point, but a linear motion, which avoids the pull arm from easily rubbing against the hinge arm when the pull arm is directly hinged to the trigger.

[0033] In summary, the core of this utility model's cabinet door hinge with an opening and stopping function lies in the ingenious synergy of two springs and a precise guiding mechanism, which enables segmented force distribution during the opening process, thereby achieving the functions of free opening and stopping at any angle. Specifically, it includes the following stages: 1. From closed state to initial open stage, freely open stage: When the door is closed, the first tension spring 6 is in a pre-tensioned state, and the tension it generates acts on the trigger 2 through the pull arm 4, keeping the door closed. When the user begins to pull the door open, the trigger 2 rotates around the hinge axis 3, causing the pull arm 4 to rotate as well. At this time, the first tension spring 6 is stretched, generating a rebound force that continuously pulls the trigger 2 in the closing direction. In this initial opening stage, i.e., when the door opening angle is less than the preset set angle, the second tension spring 7 is not yet fully activated or its elastic force is very small, insufficient to affect the opening of the door. Crucially, the elastic force of the first tension spring 6 is designed to be less than or equal to the weight of the door or its torque, so the user can easily and smoothly open the door without feeling significant resistance, avoiding the problem of existing hinges with return springs automatically closing at small openings. The first pin 5 slides smoothly in the first guide groove 12 and, if present, the third guide groove 43, ensuring the smooth operation of the first tension spring 6.

[0034] 2. The pause function is triggered when the set angle is reached to the maximum opening stage: As the opening angle of the door continues to increase, when it rotates to the preset "set angle", the second guide groove 41 on the pull arm 4 will begin to contact the second pin 8, which is fixed to the hinge arm 1 and connected to the second tension spring 7 via the third pin 9. Since the second pin 8 is constrained by the first guide groove 12, this contact will force the second pin 8 to move along a specific path of the guide groove, thereby pulling the second tension spring 7 to be stretched and activated, causing it to generate a significant elastic force.

[0035] At this point, the first tension spring 6 and the second tension spring 7 in the hinge mechanism will be simultaneously subjected to force and generate a resultant force, which will act together on the pull arm 4, and then act on the trigger 2 through the pull arm 4. The core advantage of this utility model is that, through precise calculation and design, the total tension or total torque generated by the two tension springs can be greater than or at least equal to the weight of the door itself at this stage. When the door is opened and exceeds the set angle, because the total resultant force of the springs can offset or even overcome the weight of the door, the door can remain stable in any open position, thus realizing the "free stop" function. The user can push the door to any desired angle, and the door will stay steadily in that position, neither closing automatically nor continuing to fall to the maximum opening degree or hitting an obstacle due to gravity.

[0036] 3. Closure Phase: When the user manually closes the cabinet door, the combined force of the two tension springs assists in closing the door. After passing the set angle, the second tension spring 7 gradually releases its tension, and only the first tension spring 6 continues to provide the closing bias force until the cabinet door is completely closed.

[0037] Therefore, compared with traditional technologies, this utility model's cabinet door hinge, through an innovative dual-spring phased action mechanism, uses a first tension spring to provide closing bias and initial free opening, while a second tension spring works in conjunction with the first to provide a stopping function. Coupled with a precise guide groove and pin-shaft mating structure, it effectively solves the problem in existing technologies where cabinet doors cannot stop at any angle in the middle. It balances smooth opening, stable stopping, and convenient operation, greatly improving the user experience, preventing accidental collisions between the cabinet door and surrounding obstacles, and extending the lifespan of the furniture. It possesses significant practical value and market competitiveness, and therefore can be widely promoted and used. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0038] 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 door hinge with a door opening and stopping function, comprising a hinge arm (1) fixed to the box body and a trigger (2) fixed to the door, the trigger (2) being hinged to the hinge arm (1) via a hinge shaft (3), the trigger (2) rotating around the center of the hinge shaft (3) to realize the opening and closing of the door, characterized in that: The hinge arm (1) is provided with a receiving cavity (11), and a pull arm (4) is installed in the receiving cavity (11). The front end of the pull arm (4) is hinged to the trigger (2). A first pin (5) is also provided in the receiving cavity (11). One end of the first tension spring (6) is hooked on the first pin (5), and the other end of the first tension spring (6) is hooked on the pull arm (4). The tension generated by the first tension spring (6) pulls the trigger (2) through the pull arm (4) to swing in the closed direction. The cavity (11) is also equipped with a second tension spring (7), and the hinge arm (1) is also provided with a third pin (9). One end of the second tension spring (7) is hooked onto the third pin (9), and the other end is hooked onto the second pin (8). The hinge arm (1) is provided with a first guide groove (12), the pull arm (4) is provided with a second guide groove (41), and the second pin (8) is inserted into the first guide groove (12) and the second guide groove (41). When the hinge is opened to a set angle, the second guide groove (41) contacts the second pin (8) and pulls the second tension spring (7) to move.

2. A cabinet door hinge with a door opening pause function according to claim 1, characterized in that: The pull arm (4) is also provided with a third guide groove (43), and the first pin (5) is inserted into the first guide groove (12) and the third guide groove (43).

3. A cabinet door hinge with a door opening pause function according to claim 1, characterized in that: The pull arm (4) is provided with a mounting cavity (44), and the first tension spring (6) is installed in the mounting cavity (44).

4. A cabinet door hinge with a door opening pause function according to claim 1, characterized in that: The trigger (2) and the pull arm (4) are connected by a connecting rod (10). One end of the connecting rod (10) is hinged to the trigger (2), and the other end of the connecting rod (10) is hinged to the pull arm (4) by a fourth hinge shaft (13). The hinge arm (1) is also provided with a fourth guide groove (14), and the fourth hinge shaft (13) is slidably installed in the fourth guide groove (14).

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