JP2018027006A5

JP2018027006A5 -

Info

Publication number: JP2018027006A5
Application number: JP2017132935A
Authority: JP
Filing date: 2017-07-06
Publication date: 2020-08-06
Anticipated expiration: 2037-07-06

Description

本発明に係る振動型アクチュエータは、振動体と接触体とを相対的に移動させる振動型アクチュエータであって、前記振動体を支持し、前記振動体へ給電する支持部材を有し、前記支持部材は、前記振動体に接合される振動部と、前記支持部材を所定の位置に固定するために前記振動体を挟んで対向して設けられる第１固定部および第２固定部と、前記振動部と前記第１固定部とを連結して前記振動体を支持する第１支持部と、前記振動部と前記第２固定部とを連結して前記振動体を支持する第２支持部と、前記振動体から前記第１固定部へ延出し、かつ、前記振動体から前記第２固定部へ延出し、前記振動体へ給電する導通部材と、を有し、前記導通部材の前記第１支持部と前記第２支持部における配線形状は、一平面上で互いに直交すると共に前記振動体の厚み方向と直交する第１対称軸と第２対称軸の各軸について対称の形状を有することを特徴とする。 Vibration actuator according to the present invention is a vibration type actuator for relatively moving the contact member and the vibration member, it supports the vibrating member has a support member for supplying power to the vibrator, the supporting member , it said a vibrating section is bonded to the vibrating body, said first fixing portion is provided on opposite sides of the vibrating body and a second fixing portion for fixing said support member to a predetermined position, the vibrating portion And a first support part for connecting the first fixed part to support the vibrating body, a second support part for connecting the vibrating part and the second fixed part to support the vibrating body, extending into the first fixing portion from the vibrating body, and extends from the vibrator to the second fixing portion, have a, a conductive member for supplying power to the vibrating member, the first support portion of said conductive member the wiring shape of the second support portion, characterized in that have a symmetrical shape about the respective axes of the first symmetry axis and the second axis of symmetry perpendicular to the thickness direction of the vibrating body with mutually orthogonal on one plane and And

以下、本発明の実施形態について、添付図面を参照して詳細に説明する。最初に本発明の第１実施形態について説明する。図１（ａ）は、本発明の第１実施形態に係る振動型アクチュエータ１０の概略構成を示す斜視図である。図１（ｂ）は、振動型アクチュエータ１０を構成する振動体１１の概略構成を示す斜視図である。振動型アクチュエータ１０は、被駆動体２（接触体）、振動体１１、ＦＰＣ（フレキシブルプリント基板）１２及び裏打ち材（補強部材）１３を有する。振動体１１は、弾性体１１ａ、圧電素子１１ｂ及び一対の突起部１１ｃを有する。説明の便宜上、図１に示す互いに直交するＸ軸、Ｙ軸、Ｚ軸を定める。Ｙ軸方向は、２つの突起部１１ｃを結ぶ方向である。Ｚ軸方向は、突起部１１ｃの突出方向、弾性体１１ａ及び圧電素子１１ｂの厚み方向である。Ｘ軸方向は、Ｙ軸方向及びＺ軸方向の両方向と直交する方向であり、被駆動体２が振動体１１により摩擦駆動されることにより、被駆動体２と振動体１１とが相対的に移動する方向である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, a first embodiment of the present invention will be described. FIG. 1A is a perspective view showing a schematic configuration of a vibration type actuator 10 according to the first embodiment of the present invention. FIG. 1B is a perspective view showing a schematic configuration of a vibrating body 11 that constitutes the vibrating actuator 10. The vibration type actuator 10 includes a driven body 2 (contact body) , a vibration body 11, an FPC (flexible printed circuit board) 12, and a backing material (reinforcing member) 13. The vibrating body 11 has an elastic body 11a, a piezoelectric element 11b, and a pair of protrusions 11c. For convenience of description, the X axis, Y axis, and Z axis shown in FIG. The Y-axis direction is the direction connecting the two protrusions 11c. The Z-axis direction is the protruding direction of the protrusion 11c and the thickness direction of the elastic body 11a and the piezoelectric element 11b. The X-axis direction is a direction orthogonal to both the Y-axis direction and the Z-axis direction, and when the driven body 2 is frictionally driven by the vibrating body 11, the driven body 2 and the vibrating body 11 are relatively moved. It is the direction to move.

Claims

A vibration-type actuator for relatively moving the contact member and the vibration member,
A support member that supports the vibrating body and supplies power to the vibrating body ,
The support member is
A vibrating portion joined to the vibrating body,
A first fixing portion and a second fixing portion that are provided to face each other with the vibrating body interposed therebetween to fix the support member at a predetermined position;
A first support part that connects the vibrating part and the first fixing part to support the vibrating body;
A second support part that connects the vibrating part and the second fixing part to support the vibrating body;
Extending into the first fixing portion from the vibrating member, and extends from the vibrator to the second fixing portion, have a, a conductive member for supplying power to the vibrator,
The wiring shapes in the first support portion and the second support portion of the conductive member are about a first symmetry axis and a second symmetry axis that are orthogonal to each other on one plane and orthogonal to the thickness direction of the vibrating body. vibration-type actuator, characterized in that have a symmetric shape.

The vibrator has a flat plate-like shape, the vibration-type actuator according to claim 1, characterized in that it has a symmetrical shape for each axis of the second axis of symmetry and the first axis of symmetry.

The vibrating body has a rectangular shape, and each axis of the first symmetry axis and the second symmetry axis is parallel to each of a short side and a long side of the vibrating body. 2. The vibration type actuator according to item 2.

The said 1st fixing|fixed part and the said 2nd fixing|fixed part are provided in the position which becomes line symmetrical about each axis|shaft of the said 1st symmetry axis|shaft and the said 2nd symmetry axis|shaft, The vibration of Claim 2 or 3 characterized by the above-mentioned. Type actuator.

The shape of the said 1st support part and the said 2nd support part is symmetrical about each axis|shaft of the said 1st symmetry axis|shaft and the said 2nd symmetry axis|shaft, The any one of Claim 2 thru|or 4 characterized by the above-mentioned. The vibration-type actuator according to item 1.

The conductive member is in any one of claims 1 to 5, characterized in that it has two power supply wiring portion provided at a predetermined interval in the direction in which conductor through member is perpendicular to the direction extending The vibration type actuator described.

7. The vibration type actuator according to claim 6 , wherein the conductive member has a wiring portion for grounding between the two power supply wiring portions.

Wherein the support member, the vibration type according to any one of claims 1 to 7, characterized in that it has the said conducting member into a sheet-like member of rigid small two layers than conductive member is sandwiched structure Actuator.

The vibration type actuator according to claim 8 , wherein the conductive member is a metal foil or a metal wire.

The vibrating actuator according to any one of claims 1 to 9 , wherein a reinforcing member is provided on the first fixing portion and the second fixing portion included in the supporting member.

Wherein the support member, the vibration type actuator according to any one of claims 7 to 10, characterized in that a flexible printed circuit board which is bonded to the vibrating body.

The vibrating body, vibration-type actuator according to any one of claims 1 to 11, characterized in that it has at least one protrusion provided on a surface opposed to the contact body.

2. The vibration body and the contact body are moved relative to each other by exciting at least a vibration in the first bending vibration mode and a vibration in the second bending vibration mode in the vibration body. 13. The vibration type actuator according to any one of 12 .

The vibrator is electrically be closed and the first electrode portion and the second electrode portion - comprises a mechanical energy conversion element,
The frequency-admittance characteristics of the electro-mechanical energy conversion element in both the case where an AC voltage is applied to the first electrode section and the case where an AC voltage is applied to the second electrode section have the first bending. The vibration type actuator according to claim 13 , wherein the vibration type actuator has a peak at a resonance frequency of a vibration mode and a peak at a resonance frequency of a second bending vibration mode.

The resonance frequency of the first bending vibration mode and the resonance frequency of the second bending vibration mode satisfy the following formula,
0<Δf<fa×0.15
Where Δf is the difference between the resonance frequency of the first bending vibration mode and the resonance frequency of the second bending vibration mode, and fa is the resonance frequency of the first bending vibration mode and the second bending vibration mode. 14. The vibration type actuator according to claim 13 , wherein the vibration type actuator has a higher resonance frequency among the resonance frequencies of the vibration mode.

The vibration type actuator according to claim 1, wherein a part of the conductive member is not used for power feeding and grounding.

The vibrating body and the contact body are relatively arranged along a direction in which the first fixing portion, the first supporting portion, the vibrating portion, the second supporting portion, and the second fixing portion are arranged in a straight line. The vibration type actuator according to any one of claims 1 to 16, wherein the vibration type actuator moves.

A vibration-type actuator according to any one of claims 1 to 17 ,
A member positioned by driving the vibration type actuator.