Apparatus, system, and method for adjusting head-mounted-display straps
A head-mounted-display adjustment apparatus may include a spring assembly that includes a spring with a restoring force. The adjustment apparatus may also include a strap with a distal section coupled to a head-mounted display and a proximal section coupled to the spring assembly such that (i) the strap is extendable, via deflection of the spring, away from the head-mounted display, and (ii) when a user is wearing the head-mounted display, the restoring force of the spring holds, via the strap, the head-mounted display against the user's face. The adjustment apparatus may additionally include a projection assembly that couples the spring assembly to the head-mounted display and via which the spring assembly is extendable away from the head-mounted display. The adjustment apparatus may further include a mount that couples the projection assembly to the head-mounted display. Various other apparatuses, systems, and methods are also disclosed.
1. A head-mounted-display adjustment apparatus comprising:
a spring assembly comprising a compression spring with a restoring force;
a strap comprising a distal section coupled to a head-mounted display and a proximal section coupled to the spring assembly such that:
the strap is extendable, via deflection of the spring, away from the head-mounted display, and
when a user is wearing the head-mounted display, the restoring force of the spring holds, via the strap, the head-mounted display against the user's face;
a projection assembly that couples the spring assembly to the head-mounted display and via which the spring assembly is extendable away from the head-mounted display, wherein extending the spring assembly away from the head-mounted display via the projection assembly decompresses the spring; and
a mount that couples the projection assembly to the head-mounted display.
2. The head-mounted-display adjustment apparatus of claim 1 , wherein:
the spring assembly comprises:
a tube that houses the spring,
a strap connector coupled to a distal end of the tube,
a distal stopping surface within the tube between the strap connector and a distal end of the spring, and
a proximal stopping surface within the tube at a proximal end of the spring; and
the strap connector couples the proximal section of the strap to the tube.
3. The head-mounted-display adjustment apparatus of claim 2 , wherein extending the strap away from the head-mounted display pulls the distal stopping surface toward the proximal stopping surface and thereby compresses the spring between the distal stopping surface and the proximal stopping surface.
4. The head-mounted-display adjustment apparatus of claim 2 , wherein the spring assembly comprises a rod that is within the tube and that couples the distal stopping surface to a proximal end of the projection assembly and thereby anchors the distal stopping surface within the tube.
5. The head-mounted-display adjustment apparatus of claim 1 , wherein extending the spring assembly away from the head-mounted display via the projection assembly extends the strap away from the head-mounted display.
6. The head-mounted-display adjustment apparatus of claim 1 , wherein the projection assembly comprises:
a sheath that holds the spring assembly, the exterior surface of the sheath comprising ridges defining an external thread; and
a barrel with an internal thread adapted to fit the external thread of the sheath.
7. The head-mounted-display adjustment apparatus of claim 6 , wherein the barrel is coupled to the mount such that rotating the barrel causes linear movement of the sheath relative to the mount.
8. The head-mounted display adjustment apparatus of claim 7 , wherein:
the projection assembly comprises a clevis with a pair of prongs through which the sheath runs, the barrel being situated between the pair of prongs; and
the barrel is coupled to the mount via the clevis which inhibits linear movement of the barrel with respect to the mount.
9. The head-mounted-display adjustment apparatus of claim 8 , wherein:
the external thread of the sheath is broken such that protrusions of the external thread occur along a longitudinal surface of the sheath; and
the pair of prongs of the clevis define a channel above the longitudinal surface of the sheath adapted to allow the protrusions of the external thread to pass under the clevis during linear movement of the sheath relative to the mount.
10. The head-mounted-display adjustment apparatus of claim 6 , wherein a surface of the barrel is knurled.
11. A head-mounted-display system comprising:
a head-mounted display;
a spring assembly comprising a compression spring with a restoring force;
a strap comprising a distal section coupled to the head-mounted display and a proximal section coupled to the spring assembly such that:
the strap is extendable, via deflection of the spring, away from the head-mounted display, and
when a user is wearing the head-mounted display, the restoring force of the spring holds, via the strap, the head-mounted display against the user's face;
a projection assembly that couples the spring assembly to the head-mounted display and via which the spring assembly is extendable away from the head-mounted display, wherein extending the spring assembly away from the head-mounted display via the projection assembly decompresses the spring; and
a mount that couples the projection assembly to the head-mounted display.
12. The head-mounted-display system of claim 11 , wherein the distal section of the strap is coupled to the head-mounted display via an additional mount that couples an additional spring assembly and an additional projection assembly to the head-mounted display.
13. The head-mounted-display system of claim 12 , wherein:
the mount is connected to a first section of the head-mounted display that is dimensioned to be positioned at a left side of the user's head; and
the additional mount is connected to a second section of the head-mounted display that is dimensioned to be positioned at a right side of the user's head.
14. The head-mounted display system of claim 13 , wherein the strap comprises a medial section coupled to a third section of the head-mounted display that is dimensioned to be positioned at a forehead of the user.
15. The head-mounted-display system of claim 11 , wherein:
the spring assembly comprises:
a tube that houses the spring,
a strap connector coupled to a distal end of the tube,
a distal stopping surface within the tube between the strap connector and a distal end of the spring, and
a proximal stopping surface within the tube at a proximal end of the spring; and
the strap connector couples the proximal section of the strap to the tube.
16. The head-mounted-display system of claim 15 , wherein extending the strap away from the head-mounted display pulls the distal stopping surface toward the proximal stopping surface and thereby compresses the spring between the distal stopping surface and the proximal stopping surface.
17. The head-mounted-display system of claim 15 , wherein the spring assembly comprises a rod that is within the tube and that couples the distal stopping surface to a proximal end of the projection assembly and thereby anchors the distal stopping surface within the tube.
18. A method comprising:
securing, to a head-mounted display, a projection assembly;
coupling a spring assembly comprising a compression spring with a restoring force to the head-mounted display via the projection assembly, wherein the spring assembly is extendable away from the head-mounted display via the projection assembly, and wherein extending the spring assembly away from the head-mounted display via the projection assembly decompresses the spring;
coupling a distal section of a strap to the head-mounted display; and
coupling a proximal section of the strap to the spring assembly such that:
the strap is extendable, via deflection of the spring, away from the head-mounted display, and
when a user is wearing the head-mounted display, the restoring force of the spring holds, via the strap, the head-mounted display against the user's face.