Adjustable respirator shell

An adjustable respirator shell, suitable for being worn on a human body trunk, comprising:

• a body, including a protrusive portion and a contact portion, the protrusive portion having an opening connecting to a fluid pressure controller, the contact portion configured to contact the human body trunk;
• a belt, attaching to the body, configured to surround and to fasten the adjustable respirator shell on the human body trunk;
• and
• a buffer, covering a circumference of the contact portion, the contact portion configured to contact the human body trunk via the buffer, wherein the contact portion includes an upper chest rim, a lower belly rim and two lateral belly rims, the upper chest rim is suitable for contacting a sternum area of the human body trunk, the lower belly rim is suitable for contacting a lower belly portion of the human body trunk, and the two lateral belly rims are suitable for contacting two lateral belly portions of the human body trunk;
• wherein the buffer includes at least one cushion, and the at least one cushion has four chambers in correspondence individually with the upper chest rim, the lower belly rim and the two lateral belly rims, respectively.

An adjustable respirator shell, suitable for being worn on a human body trunk, comprising:

• a body, including a protrusive portion and a contact portion, the protrusive portion having an opening connecting to a fluid pressure controller, the contact portion configured to contact the human body trunk;
• a belt, attaching to the body, configured to surround and to fasten the adjustable respirator shell on the human body trunk;
• and
• a buffer, covering a circumference of the contact portion, the contact portion configured to contact the human body trunk via the buffer, wherein the contact portion includes a left chest rim and a right chest rim, the left chest rim is suitable for contacting a left chest and a left lateral portion of the human body trunk, and the right chest rim is suitable for contacting a right chest and a right lateral portion of the human body trunk;
• wherein the buffer includes at least one cushion, and the at least one cushion includes two chambers in correspondence individually with the left chest rim and the right chest rim of the contact portion.

An adjustable respirator shell, suitable for being worn on a human body trunk, comprising:

• a body, including a protrusive portion and a contact portion, the protrusive portion having an opening connecting to a fluid pressure controller, the contact portion configured to contact the human body trunk;
• a belt, attaching to the body, configured to surround and fasten the adjustable respirator shell on the human body trunk;
• and
• a buffer, covering a circumference of the contact portion, the contact portion configured to contact the human body trunk via the buffer;
• wherein the buffer includes at least one cushion, the at least one cushion is connected with one end of a ventilation pipe, another end of the ventilation pipe is connected to a fluid pressure controller,
• wherein the body includes an internal layer disposed inside the body by a distance between the protrusive portion and the internal layer, such that a double-layer structure is formed for accommodating the ventilation pipe between the internal layer and the protrusive portion.