Snap-action device for cooperating with toothed wheels or the like, in particular for use in electrical change-over or other switches

A snap-action device for use in electrical switches, comprising:

• at least one wheel having teeth on its periphery;
• a switch having a body comprising a base and a cylindrical wall for supporting said wheel, said base having a guide with a shoulder, said cylindrical wall being symmetrical about a first axis and having opposing ends, each of said opposing ends having at least one inclined portion;
• at least one elastic means;
• a pawl having a body which is symmetrical about a second axis and comprising a pawl base and side walls, said side walls having at least one surface inclined along said pawl base, said pawl being slidably attached to said guide of said switch and being moveable in a substantially radial direction of said wheel;
• connecting means for connecting said pawl to said body of said switch;
• and
• at least one tang inclined along said second axis, said tang arranged with said surface of said side walls of said pawl and said portion of said cylindrical wall of said switch to define a cavity, said elastic means being inserted and pre-loaded into said cavity.

A snap-action device for use in electrical switches, comprising:

• at least one wheel having teeth on its periphery;
• a switch having a body comprising a base and a cylindrical wall for supporting said wheel, said base having a guide with a shoulder, said cylindrical wall being symmetrical about a first axis and having opposing ends, each of said opposing ends having at least one inclined portion;
• at least one elastic means;
• a pawl having a body which is symmetrical about a second axis and comprising a pawl base and side walls, said side walls having at least one surface inclined along said pawl base, said pawl being slidably attached to said guide of said switch and being moveable in a substantially radial direction of said wheel;
• connecting means for connecting said pawl to said body of said switch, said connecting means are steps arranged to cooperate with corresponding counter-steps provided on said cylindrical wall of said body of said switch;
• and
• at least one tang inclined along said second axis, said tang arranged with said surface of said side walls of said pawl and said portion of said cylindrical wall of said switch to define a cavity, said elastic means being inserted and pre-loaded into said cavity.