Breathing adjustment apparatus

A breathing adjustment apparatus, comprising:

• a body provided with a breathing channel, the body being of a hollow tubular structure;
• a first opening disposed at one end of the body and configured to be inserted into the mouth of a user;
• a second opening in communication with the first opening, wherein the second opening is disposed at the other end of the body and configured for exhalation;
• and
• an inner core housed within the body for providing a breathing resistance;
• wherein air enters the body through the first opening and reaches the second opening through the inner core,
• wherein the body comprises a first body and a second body connected to the first body, the first body being rotatable clockwise or counterclockwise relative to the second body, the first body comprises a first connecting portion, and a first accommodating cavity extending toward the second opening and configured to accommodate the inner core, the first accommodating cavity comprises a third opening,
• the second body comprises a second connecting portion, the first connecting portion being connected to the second connecting portion, and the first connecting portion being rotatable clockwise or counterclockwise relative to the second connecting portion,
• the first connecting portion comprises a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure being configured to restrict the second body to a first position and a second position on the first body,
• the first limiting structure and the second limiting structure are disposed on the outer edge of the first connecting portion and protrude outward, respectively,
• the first body comprises a first breathing channel, wherein the second body comprises a second breathing channel, and wherein the first breathing channel and the second breathing channel constitute the breathing channel,
• a first boss is disposed at an end of the first accommodating cavity in proximity to the second opening, the second opening matches the first boss in a manner that the first boss is inserted into and blocks the second opening, while the second body is at the first position, the first boss is inserted into the second opening, and the first body is not rotatable clockwise or counterclockwise relative to the second body in a manner that the first breathing channel and the second breathing channel are not in communication with the external environment;
• and
• while the second body is at the second position, the first boss is separated from the second opening, and the first body is rotatable clockwise or counterclockwise relative to the second body, in a manner that the first breathing channel and the second breathing channel are in communication with the external environment,
• while the first boss is separated from the second opening and the first body is rotatable clockwise or counterclockwise relative to the second body, the second body is rotated by the user in a manner that the first boss misaligns with the first opening,
• the first body comprises a tip configured to be inserted into the mouth of the user.