Shoulder braces and methods of use
A shoulder brace has: a support structure; strap retractors such as flat spiral torsion springs mounted to the support structure; and left and right shoulder straps each having a first strap part connected to the support structure and a second strap part connected to a free end of a respective spiral torsion spring. A method has the following stages: positioning a support structure against a user's upper back; looping left and right shoulder straps around a user's left and right shoulders, respectively; and in which each of the left and right shoulder straps connects to the support structure via a strap retractor, such as a spiral torsion spring for applying tension through the respective left or right shoulder strap to pull the user's shoulders back.
1. A shoulder brace comprising:
a support structure;
a plurality of flat spiral torsion springs mounted to the support structure; and
left and right shoulder straps each having a first strap part connected to the support structure and a second strap part connected to a free end of a respective flat spiral torsion spring.
2. The shoulder brace of claim 1 in which the support structure comprises left and right housings that are connected via a hinge and each mount a respective flat spiral torsion spring.
3. The shoulder brace of claim 2 in which each of the left and right housings have an upper-back-contacting base and a top cover that collectively define an interior compartment mounting a respective flat spiral torsion spring.
4. The shoulder brace of claim 3 in which each of the left and right housings further comprise a strap port, defined between the interior compartment and an exterior, through which the respective left or right shoulder strap passes.
5. The shoulder brace of claim 4 in which each of the left and right housings further comprise a spool that is within the interior compartment and secured to the free end of the respective flat spiral torsion spring, the spool mounting the second strap part of the respective left or right shoulder strap.
6. The shoulder brace of claim 5 in which each of the left and right housings comprise spool bearings that are located within the interior compartment.
7. The shoulder brace of claim 6 in which the spool bearings are located adjacent opposed first and second lateral walls, respectively, that define the strap port.
8. The shoulder brace of claim 7 in which, for each of the left and right housings, the spool bearings are bushing sleeves positioned on respective posts.
9. The shoulder brace of claim 4 further comprising a torque adjuster between the first strap part and the second strap part for adjusting the length of the second strap part between the torque adjuster and the free end of the respective flat spiral torsion spring.
10. The shoulder brace of claim 9 in which the shoulder brace is configured to have a pre-torqued neutral position where each torque adjuster seats against a seating surface associated with a respective strap port to apply a non-zero tension to a respective flat spiral torsion spring through the respective second strap part.
11. The shoulder brace of claim 3 in which each top cover is connected to a respective base via the hinge.
12. The shoulder brace of claim 3 in which each of the left and right housings secure an anchor end of the respective flat spiral torsion spring.
13. The shoulder brace of claim 6 in which the spool bearings comprise one or more lateral projections.
14. The shoulder brace of claim 2 in which the left and right housings comprise respective upper-back-contacting pads that cooperate in use to space the support structure and hinge out of contact with skin overlying a user's spine.
15. The shoulder brace of claim 2 in which the hinge comprises a left hinge and a right hinge, and the left and right housings are separated by a spacer part that connects to the left and right housings via the left hinge and the right hinge, respectively.
16. The shoulder brace of claim 2 in which the support structure has a clamshell design with a deployed position where the left and right housings are spread apart from one another, and a folded position where the left and right housings stack one on top of the other.
17. The shoulder brace of claim 1 in which a coil axis of each flat spiral torsion spring is perpendicular to a contact plane defined by an upper-back-contacting surface of the support structure.
18. The shoulder brace of claim 1 in which one or both of the left and right shoulder straps comprise a buckle and a length adjuster on the first strap part.
19. A method comprising:
positioning a support structure against a user's upper back, the support structure having a plurality of spiral torsion springs;
looping left and right shoulder straps around a user's left and right shoulders, respectively; and
in which each of the left and right shoulder straps connects to the support structure via a respective spiral torsion spring for applying tension through the respective left or right shoulder strap to pull the user's shoulders back.
20. A shoulder brace comprising:
a housing;
strap retractors mounted within the housing;
left and right shoulder straps each having a first strap part, a second strap part, and a torque adjuster, in each first strap is connected to the housing, each second strap part passes through a respective strap port in the housing to connect to a respective strap retractor, and each torque adjuster is between the first strap part and the second strap part for adjusting the length of the second strap part between the torque adjuster and the respective strap retractor; and
in which the shoulder brace is configured to have a pre-torqued neutral position where each torque adjuster seats against the respective strap port and applies a non-zero tension to the respective strap retractor through the respective second strap part.