초록 ▼

A piezoelectric tuning fork device comprises a plate-like tuning vibrator having a pair of prongs and a base with a slot defined between the prongs. The tuning vibrator has at least one electrode layer deposited on and overlying a piezoelectric layer formed on one of the opposed major surfaces of th

A piezoelectric tuning fork device comprises a plate-like tuning vibrator having a pair of prongs and a base with a slot defined between the prongs. The tuning vibrator has at least one electrode layer deposited on and overlying a piezoelectric layer formed on one of the opposed major surfaces of the tuning vibrator. The electrode layer is generally U-shaped and has a pair of opposed leg portions each so positioned as to have its longitudinal axis located to one side of the imaginary corresponding prong.

대표청구항 ▼

A piezoelectric tuning fork, comprising: a generally planar vibrator means made of an electrically conductive non-piezoelectric material, said vibrator means having two opposed major surfaces and having two prongs and a base portion, said prongs extending from said base portion in generally the same

A piezoelectric tuning fork, comprising: a generally planar vibrator means made of an electrically conductive non-piezoelectric material, said vibrator means having two opposed major surfaces and having two prongs and a base portion, said prongs extending from said base portion in generally the same direction and defining a gap between them, and each of said prongs being divided by an imaginary longitudinal center line into an inner and an outer side, said inner side of each prong being adjacent to said gap and said outer side of each prong being remote from said gap; a first piezoelectric layer disposed on one of said opposed major surfaces and covering said one major surface substantially completely; a first U-shaped electrode layer disposed on said first piezoelectric layer and having two arm portions and a central portion, each of said arm portions overlying a respective one of said prongs, each of said arm portions being substantially on one side of said center line of its respective prong, and said arm portions being about equally remote from said gap in a direction perpendicular to said direction in which said prongs and said gap extend, said first electrode layer being the only electrode layer disposed on said piezoelectric layer; and said tuning fork having a first terminal connected to said first electrode, and having a second terminal connected to said tuning fork at such a location that an electrical signal applied to either of said terminals must pass through said first electrode, said first piezoelectric layer, and said vibrator means to reach the other said terminal.