A notebook computer hinge with variable rotational torque

Abstract

The utility model discloses a kind of rotating torsion variable notebook computer pivot, it includes fixed support, rotating support, center shaft, friction component and torsion adjusting mechanism, the friction component is set on center shaft and generates friction torsion by axial pressure;The torsion adjusting mechanism is set on center shaft, it includes the fixed cam piece being arranged in fixed support, the driven cam piece rotating with rotating support, and the pressure adjusting push rod for transmitting axial pressure between driven cam piece and friction component;When rotating support rotates, the driven cam piece can axially slide under the extrusion of fixed cam piece end face arc profile, and change axial pressure exerted on the friction component by pressure adjusting push rod to change rotating torsion.The utility model can automatically and smoothly change rotating torsion according to rotation angle, significantly improve screen opening and closing hand feeling, enhance stability at key angle, and prolong the service life of pivot.

Description

Technical Field

[0001] This utility model relates to the field of hardware structure technology of laptop computers, and in particular to a laptop computer hinge with variable rotational torque. Background Technology

[0002] Currently, in existing technology, the laptop hinge is a key component connecting the display and the base. It needs to provide sufficient torque to support the display at any angle while ensuring smooth and stable opening and closing. Traditional laptop hinges typically provide constant or very limited torque. This design has some inherent drawbacks: 1. Poor opening and closing experience: In the initial stage of opening the screen, significant static friction needs to be overcome, which may result in a stiff opening action; while near the maximum opening angle, users may feel a looseness due to insufficient torque, or need to apply extra force to prevent the screen from tilting back excessively. 2. Stability and safety issues: Constant torque cannot perfectly adapt to the needs of different opening and closing stages. Too little torque makes the screen prone to wobbling when subjected to slight vibrations; too much torque makes one-handed opening and closing difficult and may cause premature fatigue damage to the hinge or screen connection components due to frequent forceful operations. 3. Inability to meet diverse usage scenarios: With the widespread use of touchscreens and stylus input, users may need to apply greater pressure to the screen at specific angles, such as in writing mode. A hinge with constant torque may not provide sufficient stability in such scenarios.

[0003] While existing technologies have attempted to modify torque using complex spring structures, these often suffer from structural complexity, high cost, difficulty in guaranteeing reliability, or unsatisfactory torque variation curves. Therefore, there is an urgent need for a laptop hinge that is relatively simple in structure, reliable in performance, and can provide ideal variable torque. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a laptop hinge with variable rotation torque. It has a compact structure, reliable operation, and can automatically and smoothly change the rotation torque according to the rotation angle, thereby improving the screen opening and closing feel and making it more stable to use.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A laptop hinge with variable rotational torque includes a fixed bracket, a rotating bracket, a central shaft, a friction assembly, and a torque adjustment mechanism. The fixed bracket is used to connect to the host computer, the rotating bracket is used to connect to the display screen and can rotate around the central shaft, and the friction assembly is sleeved on the central shaft and generates frictional torque through axial pressure. The torque adjustment mechanism is sleeved on the central shaft and includes a fixed cam component set in a fixed bracket, a driven cam component that rotates with the rotating bracket, and a pressure adjustment push rod for transmitting axial pressure between the driven cam component and the friction assembly. The end faces of the fixed cam and the driven cam that come into contact with each other have an arc-shaped transition. When the rotating bracket rotates, the driven cam can slide axially under the squeezing action of the arc-shaped contour of the end face of the fixed cam, and the axial pressure applied to the friction assembly can be changed by the pressure adjusting push rod to change the rotational torque.

[0006] Furthermore, the fixed cam component has an arc-shaped groove formed at its end, and the driven cam component has an arc-shaped protrusion formed at its end. The arc-shaped groove and the arc-shaped protrusion are adapted to each other, and the arc-shaped groove has a longer arc-shaped profile than the arc-shaped protrusion.

[0007] Furthermore, an elastic element providing basic preload is provided between the friction assembly and the pressure regulating push rod.

[0008] Furthermore, the elastic element is a wave spring, a helical spring, or a disc spring.

[0009] Furthermore, the fixed bracket has a cylindrical rotating seat at one end, and the rotating bracket has a cylindrical rotating sleeve at one end. The cylindrical rotating seat and the cylindrical rotating sleeve are rotatably assembled via a central shaft.

[0010] Furthermore, an extended sleeve is coaxially formed at the end of the cylindrical rotating sleeve, the extended sleeve extending into the interior of the cylindrical rotating seat, and the friction component and torque adjustment mechanism are both sleeved on the extended sleeve.

[0011] Furthermore, the friction assembly includes alternatingly stacked moving friction plates and stationary friction plates, wherein the moving friction plates are linked to the rotating bracket and the stationary friction plates are linked to the fixed bracket.

[0012] Furthermore, the dynamic friction plate is assembled on the extended rotating sleeve by inner retaining teeth, and the dynamic friction plate can slide along the axial direction; The static friction plate is assembled inside the cylindrical rotating seat through the outer retaining teeth, and the static friction plate can also slide along the axial direction.

[0013] Furthermore, the inner ring of the driven cam is mounted on the extended rotating sleeve via a spline, and the driven cam can slide axially.

[0014] Furthermore, the fixed cam component is disposed inside the cylindrical rotary seat, and the end of the fixed cam component away from the driven cam component is engaged with the inner end of the cylindrical rotary seat by a locking block.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects: 1. This utility model features an optimized opening and closing feel. Through the arc-shaped contours of the fixed and driven cam components, and utilizing a pressure adjustment push rod, friction assembly, and elastic element, axial force is transmitted, thereby achieving rotational torque that varies with the angle. The torque increases at the beginning and end of the screen opening and closing process, and decreases in the middle, resulting in an opening and closing action that provides an initial sense of stability, a smooth feel in the middle, and a final, stable feel, significantly improving the user experience.

[0016] 2. This utility model can effectively enhance stability and provide greater torque at key positions such as when the screen is fully closed and at its maximum opening angle, effectively preventing the screen from loosening or shaking due to accidental touch. It is especially suitable for touch operation and handwriting input scenarios.

[0017] 3. This utility model can improve the service life of components, avoid the concentrated stress that traditional shafts bear at extreme positions, and reduce fatigue damage to the shaft itself and its connecting parts through smooth torque transition, thus extending the service life of the whole machine.

[0018] 4. This utility model has a compact and reliable structure. It utilizes the basic mechanical principles of cams and followers, has a relatively simple structure, is easy to process and assemble, has controllable costs, and has high mechanical transmission reliability and long service life.

[0019] 5. This utility model has a high degree of design flexibility. By changing the end face contour curve of the cam component, different torque and angle curves can be flexibly customized to meet the needs of laptops with different models and weights.

[0020] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a preliminary exploded view of the structure of an embodiment of the present utility model; Figure 3 This is a fully exploded structural diagram of an embodiment of the present utility model; Figure 4 This is an enlarged schematic diagram of the torque adjustment mechanism and friction assembly according to an embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the exploded structure; Figure 6 This is an enlarged schematic diagram of the extended rotating sleeve structure according to an embodiment of the present utility model; Figure 7 This is an enlarged schematic diagram of the cylindrical rotating seat according to an embodiment of the present invention; Figure 8 This is a cross-sectional assembly diagram of an embodiment of the present utility model; Among them, 1. Fixed bracket; 10. Columnar rotating seat; 2. Rotating bracket; 20. Columnar rotating sleeve; 200. Extending rotating sleeve; 3. Central shaft; 4. Friction assembly; 41. Moving friction plate; 42. Static friction plate; 5. Torque adjustment mechanism; 51. Fixed cam; 510. Arc-shaped groove; 511. Locking block; 52. Driven cam; 520. Arc-shaped protrusion; 53. Pressure adjustment push rod; 6. Elastic element. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0024] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] like Figure 1-8 As shown, this embodiment provides a laptop hinge with variable rotational torque, which mainly consists of a fixed bracket 1, a rotating bracket 2, a central shaft 3, a friction assembly 4, a torque adjustment mechanism 5, and an elastic element 6. The fixed bracket 1 is fixed to the laptop host via mounting holes; the rotating bracket 2 is connected to the display screen via mounting holes. The central shaft 3 is mounted at the end of the fixed bracket 1, the rotating bracket 2 can rotate around the central shaft 3, the friction assembly 4 is sleeved on the central shaft 3 and generates frictional torque through axial pressure, and the torque adjustment mechanism 5 is also sleeved on the central shaft 3.

[0029] Specifically, the torque adjustment mechanism 5 includes a fixed cam 51 disposed within the fixed bracket 1, a driven cam 52 that rotates with the rotating bracket 2, and a pressure adjusting push rod 53 for transmitting the axial pressure between the driven cam 52 and the friction assembly 4. The end face of the fixed cam 51 that contacts the driven cam 52 has an arc-shaped transition; when the rotating bracket 2 rotates, the driven cam 52 can slide axially under the squeezing action of the arc-shaped contour of the end face of the fixed cam 51, and the axial pressure applied to the friction assembly 4 is changed by the pressure adjusting push rod 53 to change the rotational torque.

[0030] In this embodiment, for stability during actual use, cylindrical rotating seats 10 are formed on both sides of the end of the fixed bracket 1. The cylindrical rotating seats 10 have internal accommodating space, and the central shaft 3 is fixedly assembled between the two cylindrical rotating seats 10. A cylindrical rotating sleeve 20 is formed at the end of the rotating bracket 2. The cylindrical rotating sleeve 20 is rotatably assembled on the central shaft 3 and located between the two cylindrical rotating seats 10.

[0031] Meanwhile, to facilitate the mounting of the torque adjustment mechanism 5 and the friction assembly 4, extended rotating sleeves 200 are coaxially formed at both ends of the cylindrical rotating sleeve 20, and the two extended rotating sleeves 200 extend into the cylindrical rotating seats 10 on both sides. The friction assembly 4 and the torque adjustment mechanism 5 are each provided with two sets and mounted on the extended rotating sleeves 200 on both sides.

[0032] Specifically, the friction assembly 4 in this embodiment includes multiple alternatingly stacked moving friction plates 41 and stationary friction plates 42. The moving friction plates 41 are linked to the rotating bracket 2, and the stationary friction plates 42 are linked to the fixed bracket 1. More precisely, the moving friction plates 41 are fitted onto the extending rotating sleeve 200 via inner retaining teeth, and the extending rotating sleeve 200 also has sliding grooves on its outer side. Therefore, the moving friction plates 41 are restricted from rotation but can slide axially. Similarly, the stationary friction plates 42 are fitted into the cylindrical rotating seat 10 via outer retaining teeth, and the inner wall of the cylindrical rotating seat 10 has sliding grooves. Therefore, the stationary friction plates 42 are restricted from rotation but can slide axially.

[0033] In order to drive the driven cam 52 to rotate, the inner ring of the driven cam 52 in this embodiment is mounted on the extension sleeve 200 by a spline. The extension sleeve 200 has a sliding keyway on its outer side. Therefore, the driven cam 52 is restricted from rotating but can slide along the axial direction.

[0034] In order to ensure the fixation of the fixed cam component 51, the fixed cam component 51 in this embodiment is disposed in the cylindrical rotary seat 10, and the end of the fixed cam component 51 away from the driven cam component 52 is engaged and positioned with the inner end wall of the cylindrical rotary seat 10 accommodating space by the locking block 511.

[0035] To ensure a smooth transition between the fixed cam 51 and the driven cam 52, in this embodiment, the fixed cam 51 has an arc-shaped groove 510 formed at its end, and the driven cam 52 has an arc-shaped protrusion 520 formed at its end. The arc-shaped groove 510 and the arc-shaped protrusion 520 are matched, but the arc profile length of the arc-shaped groove 510 is much greater than that of the arc-shaped protrusion 520. This ensures a larger line contact amplitude between the arc-shaped protrusion 520 and the arc-shaped groove 510, resulting in a smoother and more gradual transition. Ideally, this is achieved in... Figure 4 In the middle state, the angle between the fixed bracket 1 and the rotating bracket 2 is about 60 degrees, and the span between the two ends of the arc groove 510 is preferably between 0 degrees and 135 degrees.

[0036] In addition, the elastic element 6 in this embodiment is a wave spring, which is disposed between the friction assembly 4 and the pressure adjusting push rod 53. It can provide basic preload and also provide rebound force to the driven cam 52 to ensure smooth transition torque force.

[0037] The working principle of this embodiment is as follows: by Figure 4Taking the engagement state of the fixed cam 51 and the driven cam 52 as an example, at this time, the arc-shaped protrusion 520 and the arc-shaped groove 510 fit into the deepest part of the groove, that is, the driven cam 52 is closer to the fixed cam 51, the elastic element 6 is most relaxed, and the additional pressure on the friction assembly 4 is minimal. At this time, the angle between the fixed bracket 1 and the rotating bracket 2 is 60 degrees.

[0038] As the screen slowly closes to 0 degrees, rotating the rotating bracket 2 causes the driven cam 52 to rotate accordingly. The arc-shaped protrusion 520 is gradually squeezed by the wedge-shaped contour of the arc-shaped groove 510, causing the driven cam 52 to slowly move away from the fixed cam 51, thus axially pushing the pressure adjustment push rod 53. The elastic element 6 then squeezes the friction assembly 4, gradually increasing the additional pressure. The torque of manual rotation also increases until the screen is fully closed, at which point the elastic element 6 reaches its tightest point, and the additional pressure on the friction assembly 4 is at its maximum. This high torque ensures that the screen is tightly closed.

[0039] Similarly, when the user starts to open the screen, the axial pressure decreases and the torque drops, allowing the user to start the screen with less force.

[0040] When you need to gradually open the screen to 135 degrees or more, the same principle applies from 60 degrees onwards. The axial pressure and torque gradually increase, and the maximum torque can be obtained after reaching 135 degrees or more, which can provide stable support and prevent the screen from tilting back excessively or shaking due to touch.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laptop hinge with variable rotational torque, characterized in that: It includes a fixed bracket (1), a rotating bracket (2), a central shaft (3), a friction assembly (4), and a torque adjustment mechanism (5). The fixed bracket (1) is used to connect the host, the rotating bracket (2) is used to connect the display screen and can rotate around the central shaft (3), and the friction assembly (4) is sleeved on the central shaft (3) and generates friction torque through axial pressure. The torque adjustment mechanism (5) is sleeved on the central shaft (3), and includes a fixed cam (51) set in the fixed bracket (1), a driven cam (52) that rotates with the rotating bracket (2), and a pressure adjustment push rod (53) for transmitting the axial pressure between the driven cam (52) and the friction assembly (4). The end face of the fixed cam (51) that contacts the driven cam (52) has an arc transition; when the rotating bracket (2) rotates, the driven cam (52) can slide axially under the squeezing action of the arc contour of the end face of the fixed cam (51), and the axial pressure applied to the friction assembly (4) can be changed by the pressure adjusting push rod (53) to change the rotational torque.

2. The variable rotational torque laptop hinge according to claim 1, characterized in that: The fixed cam (51) has an arc-shaped groove (510) formed at its end, and the driven cam (52) has an arc-shaped protrusion (520) formed at its end. The arc-shaped groove (510) and the arc-shaped protrusion (520) are adapted to each other, and the arc-shaped groove (510) has a longer arc-shaped profile than the arc-shaped protrusion (520).

3. A laptop hinge with variable rotational torque according to claim 1, characterized in that: An elastic element (6) providing basic preload is also provided between the friction assembly (4) and the pressure regulating push rod (53).

4. A laptop hinge with variable rotational torque according to claim 3, characterized in that: The elastic element (6) is a wave spring, a helical spring, or a disc spring.

5. A laptop hinge with variable rotational torque according to claim 1, characterized in that: The fixed bracket (1) has a cylindrical rotating seat (10) at one end, and the rotating bracket (2) has a cylindrical rotating sleeve (20) at one end. The cylindrical rotating seat (10) and the cylindrical rotating sleeve (20) are rotatably assembled via a central shaft (3).

6. A laptop hinge with variable rotational torque according to claim 5, characterized in that: The end of the cylindrical rotating sleeve (20) is also coaxially formed with an extension rotating sleeve (200), which extends into the cylindrical rotating seat (10). The friction assembly (4) and the torque adjustment mechanism (5) are both sleeved on the extension rotating sleeve (200).

7. A laptop hinge with variable rotational torque according to claim 6, characterized in that: The friction assembly (4) includes alternating dynamic friction plates (41) and static friction plates (42). The dynamic friction plates (41) are linked with the rotating bracket (2), and the static friction plates (42) are linked with the fixed bracket (1).

8. A laptop hinge with variable rotational torque according to claim 7, characterized in that: The moving friction plate (41) is mounted on the extension sleeve (200) by the inner retaining teeth, and the moving friction plate (41) can slide along the axial direction; The static friction plate (42) is assembled inside the cylindrical rotating seat (10) by the outer retaining teeth, and the static friction plate (42) can also slide along the axial direction.

9. A laptop hinge with variable rotational torque according to claim 6, characterized in that: The inner ring of the driven cam (52) is splined onto the extension sleeve (200), and the driven cam (52) is axially slidable.

10. A laptop hinge with variable rotational torque according to claim 5, characterized in that: The fixed cam (51) is disposed inside the cylindrical rotary seat (10), and the end of the fixed cam (51) away from the driven cam (52) is engaged with the inner end of the cylindrical rotary seat (10) by a locking block (511).

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