Mouthpiece for a device for measuring a parameter of respiratory air, and respiratory air meter

A respiratory air meter or control appliance for a game, comprising:

• a device configured to measure a parameter of respiratory air;
• and
• a mouthpiece comprising:
• a wall having an end edge having a first opening portion and a second opening portion adjoining the first opening portion, wherein:
• the first opening portion and the second opening portion delimit an opening configured for blowing respiratory air into the mouthpiece;
• a contour of the opening forms a D shape or a lens shape, seen in a direction of a flow axis of respiratory air to be blown into the mouthpiece;
• and
• the first opening portion extends beyond the second opening portion along the flow axis, such that an opening surface of the opening defined by the first opening portion and the second opening portion is at a transverse angle with respect to the flow axis, wherein the mouthpiece is configured to be coupled to the device via a respiratory air interface;
• and
• an output nozzle positioned at an end of the flow channel opposite the opening so that a central axis of the output nozzle is parallel to but offset from the flow axis, such that an opening surface of the outlet nozzle and the opening for blowing respiratory air into the mouthpiece only partially overlap each other.

A mouthpiece for a device for measuring a parameter of respiratory air, comprising:

• an upper body portion with a first end edge;
• and
• a lower body portion with a second end edge,
• the upper and lower body portions together defining a flow channel along a flow axis such that the first and second end edges form an opening into the flow channel configured to receive respiratory air,
• the first end edge positioned beyond the second end edge along the flow axis, such that the opening into the flow channel is at a transverse angle relative to the flow axis, and
• the opening having a D shape or a lens shape, viewed along the flow axis;
• and
• an output nozzle positioned at an end of the flow channel opposite the opening so that a central axis of the output nozzle is parallel to but offset from the flow axis, such that each of the opening and the output nozzle does not completely overlap the other.

A mouthpiece for a device for measuring a parameter of respiratory air, comprising:

• an upper body portion with a first end edge;
• and
• a lower body portion with a second end edge, wherein
• the upper and lower body portions together define a flow channel along a flow axis such that the first and second end edges form an opening into the flow channel configured to receive respiratory air,
• the first end edge is positioned beyond the second end edge along the flow axis, such that the opening into the flow channel is at a transverse angle relative to the flow axis, and
• the opening has a D shape or a lens shape, viewed along the flow axis
• the upper body portion has an arcuate cross section that tapers outwards and decreases in curvature along the flow axis in a direction away from the opening;
• and
• the lower body portion has:
• a first section with a concave curved shape extending from the second end edge;
• and
• a second section extending from the first section, and tapering outwards congruous with the outward taper of the upper body portion.

A mouthpiece for a device for measuring a parameter of respiratory air, the mouthpiece comprising:

• an upper body portion with a first end edge;
• a lower body portion with a second end edge,
• the upper and lower body portions together defining a flow channel along a flow axis such that the first and second end edges form an opening into the flow channel configured to receive respiratory air, and
• the opening having a D shape or a lens shape, viewed along the flow axis;
• and
• an outlet nozzle positioned at an end of the flow channel opposite the opening, and configured such that the respiratory air flows out of the mouthpiece via the outlet nozzle, the outlet nozzle including a lateral projection protruding radially outward from an outer surface of the outlet nozzle and extending along a direction of the flow axis, the lateral projection configured to orient the mouthpiece relative to the device when the mouthpiece is coupled to the device.