Strap for a biometric monitor
The present disclosure relates to a wrist strap for a biometric monitor, wherein the biometric monitor comprises a casing having a first surface and a second surface opposite to the first surface, the second surface comprising a biometric sensor area located at the centre area of the second surface, said strap comprising receiving means arranged to receive the biometric monitor, such that the biometric monitor is attachable to the strap via a pair of parts enabling rotational movement of the biometric monitor, the parts being located at two opposite perimeter side edges of the biometric monitor, and thereby defining a rotation axis, wherein the perpendicular bisector of the rotation axis between the pair of parts is arranged to pass through the centre area of the second surface. The present disclosure also provides a biometric monitor connected to the wrist strap.
1. A wrist strap for a biometric monitor, comprising:
a strap formed in one-piece and having two ends, the strap comprising an aperture between the two ends and wherein the strap comprises a first elastomeric material; and
a frame enclosed in the aperture in the strap, wherein the frame is a polygonal shape having a top side and an opposing bottom side, a first side and an opposing second side, and a third side and an opposing fourth side, and wherein the frame comprises a second elastomeric material; the frame being arranged to receive and removably attach the biometric monitor to the strap, wherein the frame is arranged to receive the biometric monitor inside the frame by stretching the frame so that the biometric monitor securely fits into the frame when the elastic second elastomeric material is returned to the original shape; and the frame being connected to the strap via a single pair of parts comprised in the aperture in the strap enabling rotational movement of the biometric monitor, wherein one of the parts being located on the third side and the other one of the parts being located on the opposing fourth side of the frame, and thereby defining a rotation axis between the single pair of parts, wherein the parts do not extend into and through the frame or strap, the rotation axis extending in a first direction which is a perpendicular direction to the direction of the strap, wherein a perpendicular bisector of the rotation axis between the single pair of parts is arranged to pass through a centre area of the frame, wherein the frame in the aperture is connected to the strap only by the single pair of parts and the frame is otherwise freely rotatable around the rotation axis, wherein the strap does not rotate about the rotation axis;
wherein the single pair of parts comprises a third elastomeric material.
2. The wrist strap of claim 1 , wherein the first elastomeric material and the second elastomeric material are the same, wherein the frame and the strap contain reinforced parts embedded in the second elastomeric material and the first elastomeric material, respectively.
3. The wrist strap of claim 2 , wherein the first elastomeric material and the second elastomeric material are is a silicone, and the strap contains one or more reinforcing parts embedded in the silicone.
4. The wrist strap of claim 1 , wherein the diameter of the centre area is in the range of 8-15 mm.
5. The wrist strap of claim 1 , wherein the diameter y of the sensor area is 1-3 mm smaller than the distance x of the rotation axes.
6. The wrist strap of claim 1 , wherein the first elastomeric material, the second elastomeric material, and the third elastomeric material are the same.
7. A wearable device, comprising:
a biometric monitor comprising a casing having a first surface and a second surface opposite to the first surface, the second surface comprising a biometric sensor area located at the centre area of the second surface, the centre area having a diameter in the range of 5-20 mm, and
a wrist strap comprising:
a strap formed in one-piece and having two ends, the strap comprising an aperture between the two ends and wherein the strap comprises a first elastomeric material; and
a frame enclosed in the aperture in the strap, wherein the frame is a polygonal shape having a top side and an opposing bottom side, a first side and an opposing second side, and a third side and an opposing fourth side, and wherein the frame comprises a second elastomeric material; the frame being arranged to receive and removably attach the biometric monitor to the strap, wherein the frame is arranged to receive the biometric monitor inside the frame by stretching the frame so that the biometric monitor securely fits into the frame when the elastic second elastomeric material is returned to the original shape; and the frame being connected to the strap via a single pair of opposing parts comprised in the aperture in the strap enabling rotational movement of the biometric monitor, wherein one of the parts being located on the third side and the other one of the parts being located on the opposing fourth side of the frame, and thereby defining a rotation axis between the single pair of parts, wherein the parts do not extend into and through the frame or strap, the rotation axis extending in a first direction which is a perpendicular direction to the direction of the strap, wherein a perpendicular bisector of the rotation axis between the single pair of parts is arranged to pass through a centre area of the frame, wherein the frame in the aperture is connected to the strap only by the single pair of parts and the frame is otherwise freely rotatable around the rotation axis, wherein the strap does not rotate about the rotation axis, and
wherein the biometric monitor is connected to the wrist strap; and
wherein the single pair of parts comprises a third elastomeric material.
8. The biometric monitor of claim 7 , wherein the single pair of parts comprise a single pair of elastic parts.
9. The biometric monitor of claim 7 , wherein the biometric sensor area comprises an optical sensor.
10. The biometric monitor of claim 9 , wherein the biometric monitor is arranged to obtain a photoplethysmogram (PPG).