Adaptive belt for impact
An adaptive belt is attached to a vehicle seat and includes a first section ( 101 ), a second section ( 102 ), and a third section ( 103 ). The adaptive belt includes a retracted configuration and a fully extended configuration. In the retracted configuration, the adaptive belt is folded between the first section and the second section such that a first attachment attaches the first section to a first portion of the second section. In the retracted configuration, the adaptive belt is also folded between the second section and the third section such that a second attachment attaches a second portion of the second section to a first portion of the third section. In the fully extended configuration, all of the attachments fail thereby increasing a length of the adaptive belt. In response to a threshold loading condition, the adaptive belt changes from the retracted configuration to the fully extended configuration.
1. An adaptive belt attached to a vehicle seat, the adaptive belt comprising:
a first section, a second section, and a third section, wherein:
the first section, the second section, and the third section form a continuous belt; and
the adaptive belt comprises a retracted configuration and a fully extended configuration;
wherein, in the retracted configuration:
the adaptive belt is folded between the first section and the second section such that a first attachment attaches the first section to a first portion of the second section;
the adaptive belt is folded between the second section and the third section such that a second attachment attaches a second portion of the second section to a first portion of the third section;
the first attachment is distinct from the second attachment; and
the adaptive belt has a retracted length;
wherein, in the fully extended configuration, the first attachment and the second attachment fail, thereby increasing a length of the adaptive belt to a fully extended length; and
wherein, in response to a threshold loading condition, the adaptive belt changes from the retracted configuration to the fully extended configuration.
2. The adaptive belt of claim 1 , wherein the first attachment and the second attachment each comprise at least one of stitching, adhesive, or mechanical fasteners.
3. The adaptive belt of claim 1 , wherein the first portion of the second section and the second portion of the second section are immediately adjacent one another on opposite surfaces of the second section.
4. The adaptive belt of claim 1 , wherein the first portion of the second section and the second portion of the second section are isolated from one another.
5. The adaptive belt of claim 1 , wherein the threshold loading condition comprises a crash load.
6. The adaptive belt of claim 1 , wherein the first attachment fails in response to a first load and the second attachment fails in response to a second load, wherein the second load is larger than the first load.
7. The adaptive belt of claim 1 , further comprising an intermediate configuration wherein:
in the intermediate configuration, one, but not both, of the first attachment and the second attachment fails; and
in the intermediate configuration, the adaptive belt comprises an intermediate length that is greater than the retracted length but less than the fully extended length.
8. The adaptive belt of claim 1 , further comprising a fourth section wherein, in the retracted configuration, the adaptive belt is folded between the third section and the fourth section such that a third attachment attaches a second portion of the third section to the fourth section.
9. The adaptive belt of claim 8 , further comprising a first intermediate configuration and a second intermediate configuration, wherein:
in the first intermediate configuration, one, but not all, of the first attachment, the second attachment, and the third attachment fails;
in the second intermediate configuration, two, but not all, of the first attachment, the second attachment, and the third attachment fails;
in the first intermediate configuration, the adaptive belt comprises a first intermediate length that is greater than the retracted length but less than the fully extended length; and
in the second intermediate configuration, the adaptive belt comprises a second intermediate length that is greater than the first intermediate length but less than the fully extended length.
10. The adaptive belt of claim 1 , wherein at least one of the first section, second section, or third section comprises a delay feature to ensure that the first attachment and the second attachment do not fail simultaneously.
11. A passenger seat for an aircraft comprising:
an adaptive belt attached to a frame of the passenger seat, the adaptive belt comprising:
at least a first section, a second section, and a third section, wherein:
the first section, the second section, and the third section form a continuous belt; and
the adaptive belt comprises a retracted configuration and a fully extended configuration;
wherein, in the retracted configuration:
the adaptive belt is folded between the first section and the second section such that a first attachment attaches the first section to a first portion of the second section;
the adaptive belt is folded between the second section and the third section such that a second attachment attaches a second portion of the second section to a first portion of the third section;
the first attachment is distinct from the second attachment; and
the adaptive belt has a retracted length;
wherein, in the fully extended configuration, the first attachment and the second attachment fail, thereby increasing a length of the adaptive belt to a fully extended length; and
wherein, in response to a threshold loading condition, the adaptive belt changes from the retracted configuration to the fully extended configuration.
12. The passenger seat of claim 11 , wherein the first attachment and the second attachment each comprise at least one of stitching, adhesive, or mechanical fasteners.
13. The passenger seat of claim 11 , wherein the first portion of the second section and the second portion of the second section are immediately adjacent one another on opposite surfaces of the second section.
14. The passenger seat of claim 11 , wherein the threshold loading condition comprises a crash load.
15. The passenger seat of claim 11 , wherein the first attachment fails in response to a first load and the second attachment fails in response to a second load, wherein the second load is larger than the first load.
16. The passenger seat of claim 11 , further comprising an intermediate configuration wherein:
in the intermediate configuration, one, but not both, of the first attachment and the second attachment fails; and
in the intermediate configuration, the adaptive belt comprises an intermediate length that is greater than the retracted length but less than the fully extended length.
17. The passenger seat of claim 11 , further comprising a fourth section wherein, in the retracted configuration, the adaptive belt is folded between the third section and the fourth section such that a third attachment attaches a second portion of the third section to the fourth section.
18. The passenger seat of claim 17 , further comprising a first intermediate configuration and a second intermediate configuration, wherein:
in the first intermediate configuration, one, but not all, of the first attachment, the second attachment, and the third attachment fails;
in the second intermediate configuration, two, but not all, of the first attachment, the second attachment, and the third attachment fails;
in the first intermediate configuration, the adaptive belt comprises a first intermediate length that is greater than the retracted length but less than the fully extended length; and
in the second intermediate configuration, the adaptive belt comprises a second intermediate length that is greater than the first intermediate length but less than the fully extended length.
19. The passenger seat of claim 11 , wherein at least one of the first section, second section, or third section comprises a delay feature to ensure that the first attachment and the second attachment do not fail simultaneously.
20. An adaptive belt attached to a vehicle seat, the adaptive belt comprising:
a first section, a second section, and a third section, wherein:
the first section, the second section, and the third section form a continuous belt; and
the adaptive belt comprises a retracted configuration, a fully extended configuration, and an intermediate configuration;
wherein, in the retracted configuration:
the adaptive belt is folded between the first section and the second section such that a first plurality of stitches attaches the first section to a first portion of the second section;
the adaptive belt is folded between the second section and the third section such that a second plurality of stitches attaches a second portion of the second section to a first portion of the third section;
the first plurality of stitches are distinct from the second plurality of stitches;
the adaptive belt has a retracted length;
wherein, in the fully extended configuration, the first plurality of stitches and the second plurality of stitches fail, thereby causing the adaptive belt to change length to a fully extended length;
wherein, in the intermediate configuration, one, but not both, of the first plurality of stitches and the second plurality of stitches fail such that the adaptive belt comprises an intermediate length that is greater than the retracted length but less than the fully extended length;
wherein, in response to a first loading condition, the adaptive belt changes from the retracted configuration to the intermediate configuration; and
wherein, in response to a second loading condition, the adaptive belt changes from the intermediate configuration to the fully extended configuration.