Facial-interface cushion, system, and method for head-mounted displays
A method for manufacturing a facial-interface cushion for a head-mounted display may include (1) positioning a foam layer between a recessed mold member and an insertion mold member of a mold assembly, with a first end portion of the foam layer overlapping a second end portion of the foam layer, (2) forcing the insertion mold member against the foam layer in a direction toward the recessed mold member, thereby forming a shaped foam element including a first end portion that is compressed against a second end portion between the insertion mold member and the recessed mold member, and (3) heating the shaped foam element to form a facial-interface cushion by softening the shaped foam element and bonding the first end portion of the shaped foam element to the second end portion of the shaped foam element. Various other facial-interface cushions, systems, and methods for head-mounted displays are also disclosed.
1. A method comprising:
positioning a foam layer for producing a facial-interface cushion for a head-mounted display between a recessed mold member and an insertion mold member of a mold assembly, the foam layer overlapping at least a portion of a mold channel defined in the recessed mold member and a first end portion of the foam layer overlapping a second end portion of the foam layer;
forcing the insertion mold member against the foam layer in a direction toward the recessed mold member such that at least a portion of the foam layer is forced into the mold channel defined in the recessed mold member toward a channel bottom surface, thereby forming a shaped foam element comprising a first end portion that is compressed against a second end portion of the shaped foam element between the insertion mold member and the recessed mold member;
heating the shaped foam element to form the facial-interface cushion by softening the shaped foam element and bonding the first end portion of the shaped foam element to the second end portion of the shaped foam element; and
removing the facial-interface cushion from the mold assembly.
2. The method of claim 1 , wherein the first end portion of the shaped foam element overlaps the second end portion of the shaped foam element in a portion of the shaped foam element having a reduced thickness between the insertion mold member and the recessed mold member.
3. The method of claim 1 , wherein the first end portion of the shaped foam element overlaps the second end portion of the shaped foam element in a portion of the shaped foam element corresponding to a portion of the facial-interface cushion shaped to abut a nasal region of a user's face.
4. The method of claim 1 , wherein the shaped foam element further comprises a curved surface disposed within the mold channel.
5. The method of claim 4 wherein the curved surface of the shaped foam element does not contact at least a portion of the recessed mold member defining the mold channel.
6. The method of claim 4 , wherein at least a portion of the curved surface of the shaped foam element contacts a curved surface of the recessed mold member defining at least a portion of the mold channel.
7. The method of claim 1 , wherein the shaped foam element is entirely disposed within the mold channel defined in the recessed mold member.
8. The method of claim 1 , wherein a portion of the shaped foam element is disposed outside the mold channel defined in the recessed mold member.
9. The method of claim 8 , wherein the portion of the shaped foam element disposed outside the mold channel is compressed between a surface of the recessed mold member and a surface of the insertion mold member facing the surface of the recessed mold member.
10. The method of claim 1 , wherein the mold channel defined in the recessed mold member extends along an arcuate path.
11. The method of claim 1 , wherein:
the insertion mold member comprises a protruding portion sized to fit within the mold channel defined in the recessed mold member; and
forcing the insertion mold member against the foam layer further comprises forcing the protruding portion of the insertion mold member against a portion of the foam layer overlapping at least the portion of the mold channel defined in the recessed mold member.
12. The method of claim 1 , wherein the foam layer comprises at least one of a thermoplastic material or a thermosetting material.