Flexible hinged device
This patent relates to hinged devices, such as computing devices. One example includes a first portion and a second portion. A compliant mechanism is positioned in the first portion and includes a pair of bell cranks coupled by a cross-member. A flexible hinge has opposing sides of a first end secured to the pair of bell cranks and a second end secured to the second portion.
1 . A device, comprising:
a first portion including first and second spaced-apart surfaces extending from a first hinge end to a first distal end;
a second portion extending from a second hinge end to a second distal end;
a flexible hinge positioned partially between the first and second surfaces and having a width defined between opposing sides that extends along a majority of the first hinge end; and,
a pair of bell cranks positioned between the first and second surfaces and secured to the opposing sides of the flexible hinge and linear movement of the flexible hinge generally perpendicular to the first hinge end is configured to produce rotation of the pair of bell cranks from a first orientation to a second orientation.
2 . The device of claim 1 , wherein the pair of bell cranks are connected by a cross-member.
3 . The device of claim 2 , wherein the cross-member extends from a first portion side of one bell crank to a second portion side of the other bell crank.
4 . The device of claim 3 , wherein the cross-member comprises a relatively stiff central portion interposed between two flexures that are secured to the pair of bell cranks.
5 . The device of claim 4 , further comprising a second cross-member that is secured in an opposite manner to the cross-member to create an X shape.
6 . The device of claim 3 , wherein individual bell cranks are tapered from a proximal end to a distal end.
7 . The device of claim 6 , wherein the individual bell cranks are tear drop shaped.
8 . The device of claim 4 , wherein the flexures are coupled to proximal ends of the pair of bell cranks.
9 . The device of claim 8 , further comprising distal flexures connected between the first portion and the distal ends of the pair of bell cranks.
10 . The device of claim 6 , wherein the proximal ends of the pair of bell cranks rotate relative to the first portion and the distal ends move linearly or arcuately with the flexible hinge.
11 . The device of claim 1 , wherein the linear movement of the flexible hinge out of the first portion generally perpendicular to the first hinge end is configured to cause the pair of bell cranks to store potential energy and the linear movement of the flexible hinge into the first portion generally perpendicular to the first hinge end is associated with the pair of bell cranks releasing the stored potential energy.
12 . The device of claim 11 , wherein the pair of bell cranks are connected by a cross-member, and wherein the potential energy is stored by the pair of bell cranks bending the cross-member during the rotation.
13 . A device, comprising:
a first portion;
a compliant mechanism positioned in the first portion and comprising a pair of bell cranks coupled by a cross-member; and,
a flexible hinge having opposing sides of a first end secured to the pair of bell cranks and a second end secured to a coupler that is configured to removeably couple to a second portion.
14 . The device of claim 13 , further comprising another cross-member secured to the pair of bell cranks.
15 . The device of claim 13 , wherein the cross-member synchronizes rotation of the pair of bell cranks.
16 . The device of claim 15 , wherein the compliant mechanism further comprises a flexure.
17 . The device of claim 16 , wherein the flexure comprises a portion of the cross-member.
18 . The device of claim 16 , wherein the cross-member is connected to proximal ends of the bell cranks and the flexure comprises two distal flexures that are connected to distal ends of the bell cranks.
19 . A device, comprising:
a first portion including a compliant mechanism;
a coupler configured to couple to a second portion; and,
a flexible hinge secured between the coupler and the compliant mechanism, the compliant mechanism comprising a pair of bell cranks interconnected by a cross-member.
20 . The device of claim 19 , wherein the bell cranks are configured to rotate when the flexible hinge is moved relative to the first portion.