JPH04184U

JPH04184U -

Info

Publication number: JPH04184U
Application number: JP1990039562U
Authority: JP
Priority date: 1990-04-16
Filing date: 1990-04-16
Publication date: 1992-01-06
Anticipated expiration: 2005-04-16
Also published as: JP2533802Y2

Description

[Brief explanation of the drawing]

第１図乃至第８図はこの考案に係る超音波リニ
アモータの実施例を示し、第１図は本考案の直線
帯状振動体を示す正面断面図、第２図は同直線帯
状振動体を示す側面図、第３図は同直線帯状振動
体の電気接続の状態を示す正面図、第４図は超音
波信号波形を示す図、第５図及び第６図は進行波
の波動方向を示す図、第７図及び第８図は同実施
例の作用を示す部分正面図である。主な符号の説明、１……直線帯状振動体、１ａ
，１ｂ，１ｃ……突起部、２……導電性接着剤、
３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ……圧電振
動子、４……導電線材、５……移動体、６，７…
…超音波電気信号源。 1 to 8 show an embodiment of the ultrasonic linear motor according to the invention, FIG. 1 is a front sectional view showing the linear band-shaped vibrating body of the invention, and FIG. 2 is a front sectional view showing the linear band-shaped vibrating body of the invention. A side view, FIG. 3 is a front view showing the electrical connection state of the rectilinear band-shaped vibrating body, FIG. 4 is a diagram showing the ultrasonic signal waveform, and FIGS. 5 and 6 are diagrams showing the wave direction of the traveling wave. , FIG. 7, and FIG. 8 are partial front views showing the operation of the same embodiment. Explanation of main symbols, 1... Linear band-shaped vibrator, 1a
, 1b, 1c... protrusion, 2... conductive adhesive,
3a, 3b, 3c, 3d, 3e, 3f... piezoelectric vibrator, 4... conductive wire, 5... moving body, 6, 7...
...Ultrasonic electrical signal source.

Claims

[Claims for Utility Model Registration] 1. A linear band-shaped elastic body is obtained by applying an ultrasonic electrical signal to the piezoelectric vibrator of a linear band-shaped vibrating body obtained by joining a plurality of piezoelectric vibrators at equal intervals to a linear band-shaped elastic body. In an ultrasonic linear motor that vibrates and presses a movable body against a plurality of protrusions provided on the linear band-shaped elastic body to move the movable body by frictional force, the piezoelectric vibrator is bonded to the front and back sides of the linear band-shaped elastic body, respectively; The center position of the piezoelectric vibrator on the back side is aligned with the center position of the piezoelectric vibrator on the front side in the same direction at a length of 1/4 of the wavelength λ of the standing wave generated in the linear band-shaped elastic body. Divide the piezoelectric vibrators into two sets, a set of piezoelectric vibrators and a set of piezoelectric vibrators on the back side, and apply ultrasonic electrical signals having a phase difference of π/2 to the piezoelectric vibrators of each set. A standing wave with a phase difference of /2 is generated, and by changing the sign of the phase difference between the two ultrasonic electrical signals, the direction of travel of the traveling wave generated by combining the standing waves is changed, and the moving object is An ultrasonic linear motor characterized by switching the direction of travel. 2 The polarities of adjacent piezoelectric vibrators are alternately changed, and the piezoelectric vibrators bonded to the surface of the linear band-shaped elastic body and the protrusions are in one-to-one correspondence, and the piezoelectric vibrators and the protrusions forming this pair are separated by λ/2. 2. The ultrasonic linear motor according to claim 1, wherein the ultrasonic linear motor is arranged within a length range of .