Hand held shower with a button switching mechanism for switching spray patterns

A showerhead with a button switching mechanism for switching spray patterns comprising a body, a button switching mechanism and a cover unit, said button switching mechanism mounted in a front chamber of the body, a water passage way leading from the front chamber to the end of said body, said cover unit fixed to said button switching mechanism, said cover unit having several different channels with different spray patterns respectively, and said button switching mechanism having several inlets corresponding to the channels in said cover unit, wherein:

• said button switching mechanism comprising a seat, a disc, a lever, a button, a lower ratchet wheel sleeve and an upper wheel bar, said seat fixed to said body and having an inlet channel communicated with said inlets, said disc movably mounted in said inlet channel, said disc having outlets which can cooperate with the different inlets of the inlet channel in rotation, a first end of the lever abuts against a supporting portion of said seat, and the lever urges against the seat via a return spring, a second end of said lever fixed to said button;
• the upper portion of said disc having a rotation shaft which passes through the lever, the lower ratchet wheel sleeve in turn is fixed to the upper ratchet wheel bar, an upper portion of the upper ratchet wheel bar abuts against said body, a lower portion of said upper ratchet wheel bar having several inclined grooves, and an upper portion of said lower ratchet wheel sleeve having several upstanding first protrusions which have a first inclined surface corresponding to the inclined grooves of the upper ratchet wheel bar respectively;
• said lever having a central channel for receiving said lower ratchet wheel sleeve, the vertical direction of said central channel having rooms allowing for the movement of the lower ratchet wheel sleeve, a circular edge of the lower ratchet wheel sleeve having symmetrical second protrusions, a bottom of said second protrusions having a second inclined surface, a bottom of the central channel of the lever having a third inclined surface which matches with the second inclined surface of the lower ratchet wheel sleeve, an upper portion of a wall of the central channel of the lever having a limit surface which matches with the top of the second protrusion.