Positioning hinge
First Claim
1. A positioning hinge for pivoting between a main unit and an LCD display, comprising:
- a pivotal member having a mounting end and a rotary shaft, wherein the mounting end is mounted on the main unit, and the rotary shaft has a rotary axis;
a pivotal base having a mounting part mounted on the display, and a first support through which the rotary shaft passes;
wherein the pivotal base is rotatable between a first position and a second position about the pivotal member;
a first torsion spring biasedly provided around the rotary shaft, the first torsion spring having a first and a second ends biasing against the pivotal member and the pivotal base, respectively, thereby providing a torsion force to allow the pivotal member to rotate with respect to the pivotal base;
a friction device comprising;
a positioning element having a friction surface and a through hole, wherein the friction surface generally shapes as a cam sidewall surrounding the rotary axis, and wherein the through hole allows the positioning element to be non-rotatably installed around the rotary shaft;
a resilient compression member comprising a slide-friction member and a resilient mechanism, wherein the slide-friction member has a longitudinal axis supported by the pivotal base and the resilient mechanism biases the slide-friction member between the pivotal base and the friction surface of the positioning element, so that, when the pivotal base is rotated, the slide-friction member will move along its longitudinal axis depending upon the contour of the friction surface and the biasing of the resilient mechanism;
wherein the pivotal member, pivotal base, first torsion spring and friction device are secured to the rotary shaft from a free end of the rotary shaft.
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Accused Products
Abstract
A positioning hinge for providing pivotal positioning is disclosed.
The positioning hinge comprises a pivotal member, a pivotal base, a first torsion spring and a friction device. The friction device includes a positioning element and a slide-friction member, which are kept in a resilient friction contact with each other by means of a resilient mechanism. This enables the LCD display to be opened due to the pivoting action of the pivotal base under the results of resilience and frictional positioning. It is appreciated that the above features advantageously result in an appropriate reduction in the opening speed of the LCD display while at the same time obtaining a steady frictional pivotal positioning, thereby prolonging the working life of the positioning hinge.
57 Citations
14 Claims
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1. A positioning hinge for pivoting between a main unit and an LCD display, comprising:
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a pivotal member having a mounting end and a rotary shaft, wherein the mounting end is mounted on the main unit, and the rotary shaft has a rotary axis;
a pivotal base having a mounting part mounted on the display, and a first support through which the rotary shaft passes;
wherein the pivotal base is rotatable between a first position and a second position about the pivotal member;
a first torsion spring biasedly provided around the rotary shaft, the first torsion spring having a first and a second ends biasing against the pivotal member and the pivotal base, respectively, thereby providing a torsion force to allow the pivotal member to rotate with respect to the pivotal base;
a friction device comprising;
a positioning element having a friction surface and a through hole, wherein the friction surface generally shapes as a cam sidewall surrounding the rotary axis, and wherein the through hole allows the positioning element to be non-rotatably installed around the rotary shaft;
a resilient compression member comprising a slide-friction member and a resilient mechanism, wherein the slide-friction member has a longitudinal axis supported by the pivotal base and the resilient mechanism biases the slide-friction member between the pivotal base and the friction surface of the positioning element, so that, when the pivotal base is rotated, the slide-friction member will move along its longitudinal axis depending upon the contour of the friction surface and the biasing of the resilient mechanism;
wherein the pivotal member, pivotal base, first torsion spring and friction device are secured to the rotary shaft from a free end of the rotary shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification