Device for supporting accessories and having adjustment means and related assembly

An inside motor vehicle element comprising:

• an inner wall;
• and
• a device for keeping at least one accessory against the inner wall comprising:
• a rail securable to the inner wall, the rail including a bearing element;
• a strap having a fixed length, the strap designed to keep the at least one accessory against the bearing element;
• at least one sliding element slidable along a length of the rail, the strap being able to be connected to the at least one sliding element;
• an adjustment device adjusting the strap to an active length of the strap, the adjustment device including:
• a return element adjusting the active length of the strap to a minimum length which defines a retracted configuration;
• a winder rotatable around a rotation axis, the strap winding around the winder when the active length is less than the fixed length;
• an immobilizing member, the immobilizing member being actuatable between an engaged position and a disengaged position, in the engaged position the immobilizing member prevents the winder from rotating around the axis under an effect of the return element, in the disengaged position the winder is able to freely rotate around the axis, the immobilizing member being translatable along the rotation axis between the engaged position and the disengaged position;
• an unblocking member for releasing the immobilizing member;
• and
• an adjuster further adjusting the active length of the strap, the adjuster being actuatable to drive the winder around the rotation axis when the immobilizing member is in the engaged position.