Abstract: The present invention discloses a respiratory mask to connect a user and a breathing tube for receiving a first gas and releasing a second gas, so as to provide an user's respiratory system to exchange gas. It comprises a main part, an air chamber exchange part, an insert and a clamping part. The main part provides a first, second, and third openings that are communicated each other. The first opening connects to the breathing tube to receive the first gas from the breathing tube. The air chamber exchange part provides an exhaust assembly to relieve pressure according to an internal air pressure of the air chamber exchange part. The insert connects to the user's nose so as to direct the first gas to the user or direct the second gas from the user to the air chamber exchange part. The clamping part connects to the user's mouth.

Abstract: A showerhead structure contains: a water supply disc, a water guiding disc, a covering casing, and a decoration cover. The water supply disc includes multiple through orifices. The water guiding disc contacts with a second face of the water supply disc and includes multiple spray protrusion inserted into the multiple through orifices respectively, each spray protrusion has a peripheral trench extending out of a first face of the water supply disc, and a retaining space is defined outside the water supply disc. The covering casing is covered on the second face so as to clamp the water guiding disc between the covering casing and the water supply disc and includes a body and multiple locking holes. Each locking hole retains in the retaining space of the peripheral trench of each spray protrusion of the water guiding disc extending out of the first face of the water supply disc.

Abstract: A showerhead structure contains: a water supply disc, a water guiding disc, a covering casing, and a decoration cover. The water supply disc includes a first face, a second face, and multiple through orifices. The water guiding disc includes multiple spray protrusion, each spray protrusion has a peripheral trench retained with a respective one of the multiple through orifices, and between the peripheral trench and said each spray protrusion is defined a retaining space. The covering casing is covered on the second face so as to clamp the water guiding disc between the covering casing and the water supply disc, and between the covering casing and the water guiding disc forms an accommodation room. The covering casing further includes a connecting knob for connecting with a water source, and the decoration cover includes a body having plural locking holes, wherein each locking hole retains in the retaining space.