Abstract: An air blowing adjustment apparatus includes a controller configured to control an air blowing section configured to supply air to an air cell. A flow path that connects the air blowing section to the air cell includes a first flow path part connected to the air blowing section and a second flow path part that connects the air cell to the first flow path part, and is provided with a solenoid valve configured to open and close between the first flow path part and the second flow path part. The controller is configured to perform, based on closing pressure that is internal pressure in the first flow path part when the solenoid valve is closed and the air blowing section is operated, duty adjustment control to update a duty ratio in the operation of the air blowing section.

Abstract: An air blowing adjustment apparatus includes a controller configured to control an air blowing section configured to supply air to an air cell. A flow path that connects the air blowing section to the air cell includes a first flow path part connected to the air blowing section and a second flow path part that connects the air cell to the first flow path part, and is provided with a solenoid valve configured to open and close between the first flow path part and the second flow path part. The controller is configured to perform, based on closing pressure that is internal pressure in the first flow path part when the solenoid valve is closed and the air blowing section is operated, duty adjustment control to update a duty ratio in the operation of the air blowing section.

Abstract: An air mattress includes: a plurality of air cells; and a controller configured to control an operation of an air blowing section configured to supply air to the plurality of air cells, the controller being configured to control internal pressure in the plurality of air cells. The controller is configured to determine position/posture of a user based on a detection value corresponding to a speed of the change in the internal pressure in the air cells when the controller changes the internal pressure in the air cells.

Abstract: An air mattress includes: a main mattress that supports a body of a user; and a shoulder part mattress that is disposed below the main mattress. The shoulder part mattress includes a first air cell that is disposed on an outer side in a left-and-right direction, a second air cell that is disposed on a further inner side in the left-and-right direction than the first air cell, and a third air cell that is disposed on a further inner side in the left-and-right direction than the second air cell. A front end of the second air cell is disposed further rear than a front end of the first air cell. A front end of the third air cell is disposed further rear than the front end of the second air cell.

Abstract: An air mattress includes a main mattress configured to support a body of a user, a sub mattress that is positioned below the main mattress, and a mattress controller configured to control internal pressure of the main mattress and the sub mattress. The sub mattress includes a head part air cell band configured to cause a cervical region of the user to bend forward, and a chest air cell band configured to lift a chest of the user from a back side of the user.