Wearable sensor device
A sensor device comprises a sensor ( 1 ) to be held against the wearer's skin. The sensor ( 1 ) is arranged on one side of a housing ( 2 ), and the housing is connected to a band ( 5 ) for mounting it to a body part, such as an arm or leg. Various stopper devices ( 10, 14, 20 ) are arranged on the side of the housing ( 2 ) and the band ( 5 ) that face the skin. The stopper devices improve static friction, thereby holding the housing ( 2 ) in place.
1. A wearable sensor device for measuring a physiological parameter of a wearer, said device comprising
a housing comprising at least one sensor arranged on a first side of said housing to be applied against the wearer's skin,
a flexible band connected to said housing for being wound around a body part of the wearer and for holding the first side of said housing against the wearer's skin, wherein said band has a first side to be facing said wearer's skin,
at least one stopper device arranged over a surface of the first side of said housing or of said band, wherein said stopper device has a higher coefficient of static friction than said surface
wherein said stopper device comprises a flexible strip having a first end attached to said housing and extending along part of the first side of said band, wherein a second end of said strip opposite said first end is movable with respect to said band, and
wherein said strip has a higher coefficient of static friction with respect to said skin than with respect to the first surface of said band.
2. The sensor device of claim 1 , further comprising a strap attached to said strip and extending around said band for holding said strip against said band.
3. The sensor device of claim 1 , comprising a first strip and a second strip arranged at opposite sides of said housing, with said first strip located at a first end of said band and said second strip located at a second end of said band.
4. The sensor device of claim 1 , wherein said strip has a width approximately equal to a width of said band.
5. A wearable sensor device for measuring a physiological parameter of a wearer, said device comprising
a housing comprising at least one sensor arranged on a first side of said housing to be applied against the wearer's skin,
a flexible band connected to said housing for being wound around a body part of the wearer and for holding the first side of said housing against the wearer's skin, wherein said band has a first side to be facing said wearer's skin,
at least one stopper device arranged over a surface of the first side of said housing or of said band, wherein said stopper device has a higher coefficient of static friction than said surface, and
at least one stopper device affixed to the first side of said housing.
6. The sensor device of claim 5 , comprising at least a first and a second stopper device at opposite sides of said sensor.
7. The sensor device of 5 , wherein said stopper device is longitudinal with a longitudinal axis extending transversally with respect to a longitudinal axis of said band.
8. The sensor device of claim 5 , wherein said housing forms a recess, wherein said sensor is arranged at a bottom of said recess and said stopper device is arranged on at least one side wall of said recess, with said side wall being inclined with respect to said bottom, and in particular wherein said bottom is substantially flat once filled with the sensor.
9. The sensor device of claim 1 , comprising at least one stopper device affixed to the first side of said band.
10. The sensor device of claim 1 , comprising at least one array of nubs affixed to the first side of said band.
11. The sensor device of claim 1 , wherein said band is elastically distendable along a longitudinal direction thereof with an elasticity being in a range of 0.20 to 0.32 N/%, in particular 0.26 N/%, with said elasticity expressing a change of force at 1% change of length.
12. The sensor device of claim 1 , wherein at least a surface of said stopper device is of silicone.
13. The sensor device of claim 1 , wherein said band is moisture permeable and wherein the first side of said band is of a hydrophobic material and a second side of said band, which is opposite to said first side, is of a hydrophilic material.