Configurations for grips for portable handheld devices
In one embodiment, a grip for coupling to a portable handheld device includes a base, a cap assembly, and at least two flexure bearings connecting the base and the cap assembly. Each flexure bearing includes a cap attachment section, an upper arm section, a lower arm section, a base attachment section, an upper hinge, a middle hinge, and a lower hinge. The cap attachment section is attached to the cap assembly such that a distance d c is formed between the upper hinge and a centerline of the cap assembly. The base attachment section is attached to the base such that a distance d s is formed between the lower hinge and a centerline of the base. The distance d c is smaller than the distance d s , and a length L c of the upper arm section is smaller than a length L s of the lower arm section.
1 . A grip for coupling to a portable handheld device, the grip comprising:
a base;
a cap assembly comprising a first plate and a second plate coupled to the first plate; and
at least two flexure bearings connecting the base and the cap assembly, each flexure bearing comprising:
a cap attachment section;
an upper arm section;
a lower arm section;
a base attachment section;
an upper hinge connecting between the cap attachment section and the upper arm section;
a middle hinge connecting between the upper arm section and the lower arm section; and
a lower hinge connecting between the lower arm section and the base attachment section;
wherein at least a portion of the cap attachment section of the flexure bearing is held between the first plate and the second plate, wherein the cap attachment section is attached to the cap assembly such that a distance d c is formed between the upper hinge and a centerline of the cap assembly;
wherein the base attachment section is attached to the base such that a distance d s is formed between the lower hinge and a centerline of the base;
wherein the distance d c is smaller than the distance d s , and a length L c of the upper arm section is smaller than a length L s of the lower arm section.
2 . The grip of claim 1 , wherein the distance d c , the distance d s , the length L c , and the length L s satisfy:
abs
(
L
s
-
L
c
-
d
s
+
d
c
)
≤
5
mm
.
3 . The grip of claim 1 , wherein, when d s =d c , then:
30
mm
>
L
s
+
L
c
>
15
mm
.
4 . The grip of claim 1 , wherein, when d s ≠d c , then:
30
mm
>
(
L
c
+
L
s
)
2
-
(
d
s
-
d
c
)
2
.
5 . The grip of claim 1 , wherein the length L c has a value ranging from 2 mm to 25 mm, wherein the length L s has a value ranging from 2 mm to 25 mm, wherein the distance d s has a value ranging from 5 mm to 25 mm, and wherein the distance d c has a value ranging from 5 mm to 25 mm.
6 . The grip of claim 1 , wherein the cap assembly is configured to be movable relative to the base to a non-captured position in which the cap assembly is spaced from the base, and wherein, when in the non-captured position, the at least two flexure bearings are configured to be movable between a first position in which the middle hinges bend inward toward each other, and a second position in which the middle hinges bend outward away from each other.
7 . The grip of claim 1 , wherein the base comprises a tab or a slot, and wherein the cap assembly is configured to be movable relative to the base to a stand position in which an edge of the cap assembly is engaged with the tab or the slot of the base.
8 . The grip of claim 1 , wherein the first plate and the second plate are coupled together by ultrasonic welding.
9 . The grip of claim 1 , wherein the centerline of the cap assembly extends parallel to the upper hinge, and wherein the centerline of the base extends parallel to the lower hinge.
10 . The grip of claim 1 , wherein the base comprises a sloped portion that faces the cap assembly.
11 . The grip of claim 10 , wherein the cap assembly is configured to be movable relative to the base such that when the cap assembly moves to contact the sloped portion of the base, the sloped portion initiates a lever action.
12 . The grip of claim 1 , wherein the cap assembly comprises one or more location-indicating nubs configured to provide tactile feedback to a user.
13 . The grip of claim 12 , wherein each location-indicating nub comprises a spring mechanism that is configured to allow the location-indicating nub to deflect into the cap assembly.
14 . The grip of claim 1 , wherein the cap assembly comprises a sloped portion that faces the base.
15 . The grip of claim 14 , wherein the cap assembly is configured to be movable relative to the base such that when the sloped portion moves to contact the base, the sloped portion initiates a lever action.
16 . The grip of claim 15 , wherein each flexure bearing is configured to extend to move the cap assembly away from the base upon the lever action.
17 . The grip of claim 1 , wherein the base is rotatably coupled to a frame, and wherein the frame is configured for coupling to the portable handheld device.
18 . The grip of claim 17 , wherein the base is coupled to the frame via a groove-and-protrusion assembly.
19 . The grip of claim 17 , wherein the base is magnetically coupled to the frame via one or more magnets, and wherein the base is rotatable to a plurality of discrete positions relative to the frame.
20 . The grip of claim 17 , wherein the base is removably coupled to the frame.
21 . The grip of claim 17 , wherein the frame is made of conductive metal.