JP2015065809A5 - Actuator - Google Patents

Claims (5)

圧電素子を有し、加圧部材によって接触基礎部材に加圧接触するように押圧力が付与されている状態で、当該接触基礎部材と相対的に移動可能な振動子と、
前記接触基礎部材と共に前記振動子に対して移動可能なカバー部材と、
前記振動子と共に前記接触基礎部材に対して移動可能であって、前記カバー部材との間に複数の転動部材を収容する案内部を有する移動部材と、
を備え、
前記案内部は前記移動部材に３つ設けられており、
前記案内部に収容された前記転動部材同士を直線で結んで形成される三角形内に、前記加圧部材による押圧力の押圧中心が位置するように前記転動部材が配置されている、ことを特徴とするアクチュエータ。 Have a piezoelectric element, with the pressing force such that pressure contact with the contact base member by the pressing member is attached, and the contact base member relatively movable transducer,
A cover member movable with respect to the vibrator together with the contact base member;
A movable relative to the contact base member together with the transducer, a moving member having a guide portion for accommodating a plurality of rolling member between said cover member,
With
Three guide parts are provided on the moving member ,
The rolling member is arranged so that the pressing center of the pressing force by the pressing member is located in a triangle formed by connecting the rolling members accommodated in the guide portion with a straight line, An actuator characterized by that. 前記接触基礎部材が固定されている地板部材を有し、
該地板部材は固定部を備え、該固定部は、前記振動子と前記接触基礎部材とが相対的に移動する方向に交差する方向に延在して前記カバー部材を固定し、
前記振動子が少なくとも一方の移動端に位置する際に、前記案内部が、前記固定部の可動部に面している側を越えて外方に位置する、
ことを特徴とする請求項１に記載のアクチュエータ。 A base plate member to which the contact base member is fixed;
該地plate member includes a fixed portion, the fixed portion, said cover member is fixed extending in a direction crossing the direction in which the said contact base member and the vibrator is relatively moved,
When the vibrator is located at at least one moving end, the guide part is located outward beyond the side of the fixed part facing the movable part ,
The actuator according to claim 1 . 前記可動部は、前記振動子と前記加圧部材を有し、該可動部は前記接触基礎部材と相対的に移動可能である、ことを特徴とする請求項２に記載のアクチュエータ。 The actuator according to claim 2 , wherein the movable portion includes the vibrator and the pressure member, and the movable portion is movable relative to the contact base member . 前記振動子は、前記接触基礎部材と接触する接触部を有し、当該接触部が前記圧電素子への電圧印加に伴って楕円運動を行い、当該楕円運動により、前記振動子と前記接触基礎部材とが相対的に移動する、ことを特徴とする請求項１に記載のアクチュエータ。 The vibrator has a contact portion that comes into contact with the contact basic member, and the contact portion performs an elliptical motion in accordance with voltage application to the piezoelectric element, and the vibrator and the contact basic member are moved by the elliptical motion. The actuator according to claim 1 , wherein and move relatively . 前記案内部は、前記振動子と前記接触基礎部材とが相対的に移動する方向に延在している、ことを特徴とする請求項１に記載のアクチュエータ。 It said guide portion is an actuator according to claim 1, wherein the vibrator and the contact base member is that not extend in the direction of relative movement, characterized in that.