Variable torque hinge structure for laptops

Abstract

A variable torque hinge structure for a notebook computer includes a spindle, a first cam, a second cam, and a spring assembly. The first cam, second cam, and spring assembly are mounted on the spindle. The first cam has a first inner surface and a first outer surface. The first inner surface has two first planes, two second planes, and four first inclined surfaces. The two second planes are located between the two first planes, and the four first inclined surfaces are located between the two first planes and the two second planes. Each first inclined surface has a first discontinuity with an adjacent first plane and a second discontinuity with an adjacent second plane. The second cam has a second inner surface and a second outer surface. The second inner surface has a third plane, two fourth planes, and four second inclined surfaces, which are located between the third plane and the two fourth planes. The spring assembly can elastically push the second cam, so that the first cam and the second cam can elastically engage. The first inner surface of the first cam and the second inner surface of the second cam can engage with each other, and the first inner surface and the second inner surface can form a cam structure to adjust the torque. The first discontinuity and the second discontinuity can generate elastic space. When installed, the cam structure is forced to open and rebound when rotating, so that different torques can be generated at different angles to avoid screen shaking.

Claims

1. A variable torque hinge structure for a notebook computer, comprising: One axis; A first cam is disposed on the spindle. The first cam has a first inner side and a first outer side. The first inner side has two first planes, two second planes, and four first inclined planes. The two first planes are disposed opposite to each other on the first inner side, and the two second planes are disposed opposite to each other on the first inner side. The two second planes are respectively located between the two first planes. The two second planes are closer to the first outer side than the two first planes, so that the positions of the two second planes form a groove. The four first inclined planes are respectively disposed between the two first planes and the two second planes. Each first inclined plane has a first discontinuity with the adjacent first plane, and each first inclined plane has a second discontinuity with the adjacent second plane. A second cam is disposed on the spindle. The first cam and the second cam are disposed adjacent to each other. The second cam has a second inner side and a second outer side. The second inner side has a third plane, two fourth planes and four second inclined surfaces. The two fourth planes are disposed opposite to each other on the second inner side. The two fourth planes are farther away from the second outer side than the third plane, so that the positions of the two fourth planes are formed into protrusions. The four second inclined surfaces are respectively disposed between the third plane and the two fourth planes. And a spring assembly, the spring assembly being disposed on the spindle, the spring assembly being disposed on the side of the second cam away from the first cam, the spring assembly being able to elastically push the second cam, so that the first cam and the second cam elastically engage; wherein, the first inner surface of the first cam and the second inner surface of the second cam can engage relative to each other, and the first inner surface and the second inner surface can form a cam structure to adjust the torque, and the first discontinuity and the second discontinuity can generate an elastic space.

2. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, The first discontinuity and the second discontinuity are height differences, and the height differences of the first discontinuity and the second discontinuity are different.

3. The variable torque hinge structure for a notebook computer as described in claim 2, wherein, The height difference of the first discontinuity is less than the height difference of the second discontinuity.

4. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, Each of the first inclined planes descends in height toward the adjacent second plane.

5. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, Each of the second inclined planes descends in height toward the adjacent third plane.

6. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, Each of the two first planes is provided with a plurality of grooves, the plurality of grooves being recessed into the first plane, and the plurality of grooves being arranged in at least two rows along the circumferential direction of the first cam.

7. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, The two first planes form a planar shape in the circumferential direction of the first cam, and the two first planes are planes perpendicular to the axial direction of the first cam. The two second planes form a planar shape in the circumferential direction of the first cam, and the two second planes are planes perpendicular to the axial direction of the first cam. The four first inclined surfaces form an inclined shape in the circumferential direction of the first cam.

8. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, The third plane forms a planar shape in the circumferential direction of the second cam, and the third plane is a plane perpendicular to the axis of the second cam. The two fourth planes form a planar shape in the circumferential direction of the second cam, and the two fourth planes are planes perpendicular to the axis of the second cam. The four second inclined surfaces form an inclined shape in the circumferential direction of the second cam.

9. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, A first washer is provided between the spring assembly and the second cam. The first cam is fixed to a first bracket. A second washer is provided between the first cam and the first bracket. The second cam is fixed to the spindle. The spindle is fixed to a second bracket.

10. The variable torque hinge structure for a notebook computer as described in claim 1, wherein, The first cam has a first shaft hole, which is sleeved on the mandrel. The second cam has a second shaft hole, which is sleeved on and fixed on the mandrel.

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