JP6914121B2 - Actuator - Google Patents

Description

The present invention relates to an actuator that generates various vibrations.

As a device that generates vibration by a magnetic drive mechanism, an actuator that vibrates a movable body in a second direction that intersects the support in the first direction by a magnetic drive circuit provided with coils and magnets facing each other in the first direction. Has been proposed (see Patent Document 1). In the actuator described in Patent Document 1, a plurality of prisms are formed on one of the first cover member and the second cover member, and the prisms are formed when the movable body moves to one side in the second direction. It comes into contact with the movable body and regulates the movable range of the movable body to one side in the second direction. Further, the prism portion comes into contact with the movable body when the movable body moves to the other side in the second direction, and regulates the movable range of the movable body to one side in the second direction.

Japanese Unexamined Patent Publication No. 2016-127789

However, when the prismatic portion formed on the cover member is used as the contacted portion that regulates the movable range of the movable body as in the actuator described in Patent Document 1, the strength of the prismatic portion (contacted portion) is small. Therefore, there is a problem that the prism portion is damaged when the movable body suddenly moves due to an impact at the time of dropping or the like.

In view of the above problems, an object of the present invention is to provide an actuator capable of increasing the strength of the contacted portion that regulates the movable range of the movable body.

In order to solve the above problems, an actuator to which the present invention is applied includes a support, a movable body, a connecting body connected to the movable body and the supporting body, and having at least one of elasticity and viscoelasticity. It has a coil and a magnetic drive circuit provided with a first magnet facing the coil in the first direction and moving the movable body relative to the support in a second direction intersecting the first direction. The support is a first wall portion facing the movable body on one side in the second direction, a second wall portion facing the movable body on the other side in the second direction, and the movable body. A third wall portion facing the first direction and one side of the third direction intersecting the second direction, and a fourth wall portion facing the movable body on the other side of the third direction. The width of the first wall portion and the second wall portion in the second direction is wider than the width of the third wall portion and the fourth wall portion in the third direction. Is a first contacted portion that comes into contact with the movable body when the movable body moves to one side in the second direction and regulates the movable range of the movable body to one side in the second direction. The second wall portion abuts on the movable body when the movable body moves to the other side in the second direction, and regulates the movable range of the movable body to the other side in the second direction. It is characterized by having a second contacted portion.

In the present invention, the support is in contact with the movable body when the movable body moves in the second direction on the first wall portion and the second wall portion facing the movable body on one side and the other side in the second direction. It is used as a contacted portion (first contacted portion and second contacted portion) that regulates the movable range of the movable body in the second direction. Here, the width of the first wall portion and the second wall portion in the second direction is the width of the third wall portion and the fourth wall portion facing the movable body on one side and the other side in the third direction in the third direction. Wider and stronger. Therefore, even when the movable body suddenly moves in the second direction due to an impact at the time of dropping or the like, the contacted portions (first contacted portion and second contacted portion) are less likely to be damaged.

In the present invention, the support includes a holder holding the coil or the first magnet, a first cover member whose ends overlap each other on one side of the first direction with respect to the holder, and the holder. A second cover member whose ends overlap each other on the other side of the first direction is provided, and the first wall portion and the second wall portion are the holder, the first cover member, and the like, respectively. It is possible to adopt an embodiment in which the second cover member includes a portion that overlaps in the first direction. According to this aspect, in the first wall portion and the second wall portion, the portion where the holder, the first cover member, and the second cover member overlap in the first direction is the contacted portion (the first contacted portion and the contacted portion). Since it can be used as the second contacted portion), the strength of the contacted portion (first contacted portion and second contacted portion) is high.

In the present invention, the holder and the first cover member are formed with a positioning convex portion that protrudes from one side toward the other and fits into the positioning hole formed in the other side, and the holder and the second cover member are formed. The cover member may employ a mode in which a convex portion for positioning is formed so as to project from one side toward the other and fit into the positioning hole formed in the other side. According to this aspect, the holder and the first cover member can be positioned, and the holder and the second cover member can be positioned.

In the present invention, the coil is provided on the support side in a state of being held by the holder, the first magnet is provided on the movable body, and the movable body is provided in the first direction with respect to the coil. A first yoke having a first plate portion facing the coil on one side and a second yoke having a second plate portion facing the coil on the other side in the first direction. The first magnet is fixed to one of the surface of the first plate portion facing the coil and the surface of the second plate portion facing the coil, and the first yoke is attached to the coil. With the first connecting plate portion extending from the first plate portion on one side of the second direction to a position overlapping the second yoke from the other side of the first direction and connected to the second yoke. On the other side of the second direction with respect to the coil, the coil extends from the first plate portion toward the other side of the first direction to a position where it overlaps with the second yoke and is connected to the second yoke. A second connecting plate portion is provided, and the first connecting plate portion comes into contact with the first wall portion when the movable body moves to one side in the second direction, and the second connecting plate portion of the movable body is provided. The movable range to one side in the direction is restricted, and the second connecting plate portion comes into contact with the second wall portion when the movable body moves to the other side in the second direction, and the movable body is said to have the same movable range. An aspect of restricting the movable range to the other side in the second direction can be adopted. According to this aspect, the first magnet is fixed to one of the first plate portion and the second plate portion facing each other in the first direction in the yoke, but the yoke is the same as the first yoke provided with the first plate portion. , A second plate portion is provided, and a second yoke is provided. Therefore, if the first yoke and the second yoke are connected after fixing the first magnet, it is possible to manufacture a yoke in which the magnets are fixed to the surfaces facing each other in the first plate portion and the second plate portion. can. Further, since the first yoke includes a first connecting plate portion and a second connecting plate portion extending from the first yoke to the second yoke, one side in the first direction (the second yoke is located). On the side), the first connecting plate portion and the second yoke can be connected, and the second connecting plate portion can be connected to the second yoke. Therefore, it is possible to efficiently manufacture a yoke in which magnets are fixed to surfaces facing each other in the first plate portion and the second plate portion. Further, since the stopper that regulates the movable range of the movable body in the second direction can be configured by using the first connecting plate portion and the second connecting plate portion, the configuration can be simplified.

In the present invention, the first connecting plate portion and the second connecting plate portion can be connected to the second yoke by welding. According to this aspect, since the first connecting plate portion and the second connecting plate portion are firmly connected to the second yoke, the second connecting plate portion and the second connecting plate portion of the movable body can be used to use the first connecting plate portion and the second connecting plate portion. A stopper that regulates the movable range in the direction can be configured.

In the present invention, the holder has a first opening for passing the first connecting plate portion between the coil and the first wall portion from one side to the other side in the first direction, and the coil. It is possible to adopt an embodiment in which a second opening is formed between the second wall portion and the second wall portion so that the second connecting plate portion penetrates from one side to the other side in the first direction. According to such an embodiment, the first connecting plate portion and the second connecting plate portion can be extended to a position where they overlap with the second yoke in a simple configuration.

In the present invention, the magnetic drive circuit includes a second magnet fixed to the other of the surface of the first plate portion facing the coil and the surface of the second plate portion facing the coil. Can be adopted. According to such an embodiment, the power of the magnetic drive circuit can be increased. Even in this case, if the first magnet and the second magnet are fixed to the first plate portion and the second plate portion, and then the first yoke and the second yoke are connected, the first plate portion and the second plate portion can be connected to each other. It is possible to manufacture a yoke in which magnets are fixed to facing surfaces.

In the present invention, the first cover member, the first yoke, the holder, and the second yoke are stacked in the first direction with the first cover member, the first yoke, the holder, and the second yoke overlapped with each other. A mode in which a plurality of through holes penetrating the yoke are formed can be adopted. According to this aspect, when assembling the actuator, a pin can be inserted into each of the plurality of through holes, and the first yoke, the holder, and the second yoke can be sequentially overlapped with respect to the first cover member in the first direction. ..

In the present invention, an embodiment in which a viscoelastic member is used as the connecting body can be adopted. In this case, it is possible to adopt an embodiment in which only the viscoelastic member is used as the connecting body. In the present invention, the viscoelastic member may be fixed to both the movable body and the support. In the present invention, the viscoelastic member may be a gel-like member. In the present invention, the gel-like member can adopt an aspect of being a silicone-based gel.

In the present invention, the viscoelastic member can adopt an embodiment in which the support and the movable body are arranged at positions facing each other in the first direction. According to this aspect, when the movable body moves, the elastic member is deformed in the direction intersecting the thickness direction (axial direction) (shearing direction). Therefore, regardless of the direction of movement, the deformation is in the direction of being pulled and stretched, so that the linear component (spring constant) has a larger deformation characteristic than the non-linear component (spring constant). Therefore, in the viscoelastic member, the spring force depending on the direction of movement is constant. Therefore, by using the spring element in the shear direction of the viscoelastic member, the reproducibility of the vibration acceleration with respect to the input signal can be improved, and the vibration with a delicate nuance can be realized.

In the present invention, the support is in contact with the movable body when the movable body moves in the second direction on the first wall portion and the second wall portion facing the movable body on one side and the other side in the second direction. It is used as a contacted portion (first contacted portion and second contacted portion) that regulates the movable range of the movable body in the second direction. Here, the width of the first wall portion and the second wall portion in the second direction is the width of the third wall portion and the fourth wall portion facing the movable body on one side and the other side in the third direction in the third direction. Wider and stronger. Therefore, even when the movable body suddenly moves in the second direction due to an impact at the time of dropping or the like, the contacted portions (first contacted portion and second contacted portion) are less likely to be damaged.

It is a perspective view of the actuator which concerns on embodiment of this invention. It is an XZ cross-sectional view of the actuator shown in FIG. It is a perspective view of the state where the wiring board and a screw shown in FIG. 1 are removed. It is an exploded perspective view when the actuator shown in FIG. 1 is disassembled and viewed from the other side in the first direction. It is an exploded perspective view when the actuator shown in FIG. 1 is disassembled and viewed from one side in the first direction. It is an exploded perspective view of the magnetic drive circuit shown in FIG. It is an exploded perspective view when the magnetic drive circuit shown in FIG. 2 is further decomposed. It is a top view of the state in which the 1st cover member, the 1st yoke, the holder and the 2nd yoke shown in FIG. 2 are overlapped in the 1st direction.

Embodiments of the present invention will be described with reference to the drawings. In the following description, the three directions intersecting each other will be described as the first direction Z, the second direction X, and the third direction Y, respectively. Further, the first direction Z, the second direction X, and the third direction Y are directions orthogonal to each other. Further, X1 is attached to one side of the second direction X, X2 is attached to the other side of the second direction X, Y1 is attached to one side of the third direction Y, and Y2 is attached to the other side of the third direction Y. , Z1 is attached to one side of the first direction Z, and Z2 is attached to the other side of the first direction Z.

Further, the actuator 1 to which the present invention is applied has a magnetic drive circuit 6 that moves the movable body 3 relative to the support 2, and the magnetic drive circuit 6 has a coil 7 and a magnet 8. There is. In the magnetic drive circuit 6, the coil 7 is provided on the side of the support 2 (one side member), the magnet 8 is provided on the side of the movable body 3 (the other side member), and the magnet 8 is provided on the support 2. A mode in which the coil 7 is provided on the side of the (other side member) and the coil 7 is provided on the side of the movable body 3 (one side member) can be adopted. In the following description, the embodiment in which the coil 7 is provided on the side of the support 2 and the magnet 8 is provided on the side of the movable body 3 will be mainly described.

(overall structure)
FIG. 1 is a perspective view of the actuator 1 according to the embodiment of the present invention. FIG. 2 is an XZ cross-sectional view of the actuator 1 shown in FIG. FIG. 3 is a perspective view of the wiring board and screws shown in FIG. 1 removed.

As shown in FIGS. 1 and 2, the actuator 1 of the present embodiment has a rectangular parallelepiped shape in which the dimension of the second direction X is larger than the dimension of the third direction Y as a whole. Further, as shown in FIG. 2, it has a support 2, a movable body 3 movably supported by the support 2, and a magnetic drive circuit 6 that moves the movable body 3 relative to the support 2. The magnetic drive circuit 6 vibrates the movable body 3 in the second direction X.

As shown in FIGS. 1, 2 and 3, the support 2 has a cover 11 and a holder 60, and the movable body 3 and the magnetic drive circuit 6 shown in FIG. 2 are arranged inside the cover 11. Has been done. The cover 11 has a first cover member 16 located on one side Z1 of the first direction Z, and a second cover member 17 overlapping the first cover member 16 from the other side Z2 of the first direction Z. The first cover member 16 and the second cover member 17 have a quadrangular planar shape. A holder 60 having a quadrangular planar shape is arranged between the first cover member 16 and the second cover member 17, and the first cover member 16, the holder 60, and the second cover member 17 have end portions 160. , 600, 170 overlap in the first direction Z. Therefore, the outer surface side 110 of the cover 11 is composed of the end 160 of the first cover member 16, the end 600 of the holder 60, and the end 170 of the second cover member 17.

(Structure of the first cover member 16)
FIG. 4 is an exploded perspective view when the actuator 1 shown in FIG. 1 is disassembled and viewed from the other side Z2 in the first direction Z. As shown in FIGS. 2 and 4, the first cover member 16 is formed with a quadrangular recess 165 that opens toward the other side Z2 in the first direction Z. Further, at the bottom of the recess 165, two recesses 166 and 167 arranged in the second direction X are formed. Through holes 16a are formed at diagonal positions of the recess 165. That is, in the recess 165, the corner portion located on one side X1 of the second direction X and the other side Y2 of the third direction Y, and the other side X2 of the second direction X and one side Y1 of the third direction Y are located. Through holes 16a are formed at the corners. Further, through holes 16b are formed at both ends of the recesses 166 and 167 in the third direction Y.

In the first cover member 16, the recess 165 has a first wall portion 161 located on one side X1 of the second direction X, a second wall portion 162 located on the other side X2 of the second direction X, and a third direction. It is surrounded by a third wall portion 163 located on one side Y1 of Y and a fourth wall portion 164 located on the other side Y2 of the third direction Y. When viewed from the first direction Z, the width of the first wall portion 161 and the second wall portion 162 (dimension of the second direction X) is the width of the third wall portion 163 and the fourth wall portion 164 (in the third direction Y). Dimensions) wider. A recess 168 extending along the second direction X is formed on the outer surface of the third wall portion 163.

A plurality of convex plate portions 163a and 164a projecting from the third wall portion 163 and the fourth wall portion 164 to the other side Z2 of the first direction Z along the second direction X are formed at predetermined intervals. Further, in the first wall portion 161 and the second wall portion 162, convex plate portions 161a and 162a projecting from the outer edge to the other side Z2 in the first direction Z are formed in the center of the third direction Y.

Positioning holes 16c opened toward one side of the first direction Z are formed at both ends of the third wall portion 163 and the fourth wall portion 164 in the second direction X. Further, a through hole 16e is formed at one diagonal position of the first cover member 16, and a through hole 16f is formed at the other diagonal position. That is, in the first cover member 16, the corner portion located on one side X1 of the second direction X and the other side Y2 of the third direction Y, and the other side X2 of the second direction X and one side Y1 of the third direction Y. A through hole 16e is formed in the corner portion located at, the corner portion located on one side X1 of the second direction X and one side Y1 of the third direction Y, and the other side X2 and the third direction Y of the second direction X. A through hole 16f is formed in a corner portion located on the other side Y2 of the above.

(Structure of the second cover member 17)
FIG. 5 is an exploded perspective view when the actuator 1 shown in FIG. 1 is disassembled and viewed from one side Z1 of the first direction Z. As shown in FIGS. 2 and 5, the second cover member 17 is formed substantially symmetrically with respect to the first cover member 16 in the first direction Z as described below. First, the second cover member 17 is formed with a quadrangular recess 175 that opens toward one side Z1 of the first direction Z. Further, at the bottom of the recess 175, two recesses 176 and 177 arranged in the second direction X are formed. In the second cover member 17, the recess 175 has a first wall portion 171 located on one side X1 of the second direction X, a second wall portion 172 located on the other side X2 of the second direction X, and a third. It is surrounded by a third wall portion 173 located on one side Y1 of the direction Y and a fourth wall portion 174 located on the other side Y2 of the third direction Y. When viewed from the first direction Z, the width of the first wall portion 171 and the second wall portion 172 (dimension of the second direction X) is the width of the third wall portion 173 and the fourth wall portion 174 (in the third direction Y). Dimensions) wider. A recess 178 extending along the second direction X is formed on the outer surface of the third wall portion 173.

In the third wall portion 173 and the fourth wall portion 174, a plurality of convex plate portions 173a and 174a projecting from one side Z1 of the first direction Z along the second direction X are formed at predetermined intervals. Further, in the first wall portion 171 and the second wall portion 172, convex plate portions 171a and 172a projecting from the outer edge to one side Z1 of the first direction Z are formed in the center of the third direction Y.

Positioning holes 17c opened toward one side Z1 of the first direction Z are formed at both ends of the third wall portion 173 and the fourth wall portion 174 in the second direction X. Further, a through hole 17e is formed at one diagonal position of the second cover member 17, and a through hole 17f is formed at the other diagonal position. That is, in the second cover member 17, the corner portion located on one side X1 of the second direction X and the other side Y2 of the third direction Y, and the other side X2 of the second direction X and one side Y1 of the third direction Y. A through hole 17e is formed in the corner portion located at, the corner portion located on one side X1 of the second direction X and one side Y1 of the third direction Y, and the other side X2 and the third direction Y of the second direction X. A through hole 17f is formed in a corner portion located on the other side Y2 of the above.

(Structure of magnetic drive circuit 6)
FIG. 6 is an exploded perspective view of the magnetic drive circuit 6 shown in FIG. FIG. 7 is an exploded perspective view when the magnetic drive circuit 6 shown in FIG. 2 is further disassembled. As shown in FIGS. 2, 6 and 7, the magnetic drive circuit 6 has a coil 7 and a magnet 8 facing the coil 7 in the first direction Z. In the present embodiment, the coil 7 is composed of two coils 71 and 72 arranged in parallel in the second direction X, and the coil 7 has a length in which a long side 701 (effective portion) extends in the third direction Y. It is a circular air-core coil. The coil 7 is held by the holder 60 and is provided on the side of the support 2.

(Structure of holder 60)
As shown in FIGS. 2, 5, 6 and 7, the holder 60 is formed so that two coil holding holes 66, 67 are arranged in parallel in the second direction X, and the coil holding holes 66, 67 are formed. A coil 7 is arranged in each. The coil holding holes 66 and 67 are through holes, and receiving portions 661 and 671 are formed at both ends of the third direction Y at the ends of one side Z1 of the coil holding holes 66 and 67 in the first direction Z. There is. Therefore, when the coil 7 is mounted in the coil holding holes 66 and 67 from the other side Z2 of the first direction Z, the short side 702 (invalid portion) of the coil 7 is formed by the receiving portions 661 and 671 in the one side Z1 of the first direction Z. It will be in a supported state. In this state, the coil 7 is fixed to the holder 60 with an adhesive or the like.

The holder 60 has one side X1 of the second direction X, the other side X2 of the second direction X, one side Y1 of the third direction Y, and the third side with respect to the portion where the coil holding holes 66 and 67 are formed. The other side Y2 in the direction Y includes a first wall portion 61, a second wall portion 62, a third wall portion 63, and a fourth wall portion 64. When viewed from the first direction Z, the widths of the first wall portion 61 and the second wall portion 62 (dimensions of the second direction X) are the widths of the third wall portion 63 and the fourth wall portion 64 (in the third direction Y). Dimensions) wider.

In the holder 60, a first opening 601 is formed between the coil holding hole 66 and the first wall portion 61, and a second opening 602 is formed between the coil holding hole 67 and the second wall portion 62. ing. The first opening 601 and the second opening 602 penetrate the holder 60 in the first direction Z.

In the first wall portion 61, a recess 611 is formed on one side Z1 of the first direction Z, and a recess 612 is formed on the other side Z2 of the first direction Z. The recesses 611 and 612 are formed in the center of the first wall portion 61 in the third direction Y. In the second wall portion 62, a recess 621 is formed on one side Z1 of the first direction Z, and a recess 622 is formed on the other side Z2 of the first direction Z. The recesses 621 and 622 are formed in the center of the second wall portion 62 in the third direction Y. On the outer surface side of the third wall portion 63, a plurality of recesses 631 are formed along the second direction X on one side Z1 of the first direction Z, and a plurality of recesses 632 are formed on the other side Z2 of the first direction Z. It is formed along two directions X. On the outer surface side of the fourth wall portion 64, a plurality of recesses 641 are formed along the second direction X on one side Z1 of the first direction Z, and a plurality of recesses 642 are formed on the other side Z2 of the first direction Z. It is formed along two directions X.

At both ends of the third wall portion 63 and the fourth wall portion 64 in the second direction X, a convex portion 60c for positioning protruding to one side Z1 of the first direction Z and a convex portion 60c protruding to the other side Z2 of the first direction Z. A convex portion 60d for positioning is formed. At both ends of the third wall portion 63 and the fourth wall portion 64 in the second direction X, notches 603 in which the inner walls of the first opening 601 and the second opening 602 are recessed outward are formed. ..

A through hole 60e is formed at one diagonal position of the holder 60, and a through hole 60f is formed at the other diagonal position. That is, in the second cover member 17, the corner portion located on one side X1 of the second direction X and the other side Y2 of the third direction Y, and the other side X2 of the second direction X and one side Y1 of the third direction Y. A through hole 60e is formed in the corner portion located at, the corner portion located on one side X1 of the second direction X and one side Y1 of the third direction Y, and the other side X2 and the third direction Y of the second direction X. A through hole 60f is formed in a corner portion located on the other side Y2 of the above.

Recesses 630 extending along the second direction X are formed on the outer surface of the third wall portion 63, and both ends of the recess 630 are positioned so as to project to one side Y1 of the third direction Y. A convex portion 636 is formed. The third wall portion 63 is formed with four guide grooves 637 extending from the coil holding holes 66 and 67 to the outer surface (bottom surface of the recess 630) of the third wall portion 63.

(Structure of support 2)
In this embodiment, the first cover member 16, the holder 60, and the second cover member 17 are stacked in the first direction Z, and the through hole 17e of the second cover member 17, the through hole 60e of the holder 60, and the second cover The screw 18 is fastened to the through hole 17e of the member 17, and the first cover member 16, the holder 60, and the second cover member 17 are fastened in the first direction Z. As a result, the support 2 is formed.

At that time, the convex plate portions 163a and 164a of the first cover member 16 fit into the recesses 631 and 641 of the holder 60, and the convex plate portions 161a and 162a of the first cover member 16 fit into the recesses 611 and 621 of the holder 60. Further, the convex portion 60c of the holder 60 fits into the hole 16c of the first cover member 16. Further, the convex plate portions 173a and 174a of the second cover member 17 fit into the recesses 632 and 642 of the holder 60, and the convex plate portions 171a and 172a of the second cover member 17 fit into the recesses 612 and 622 of the holder 60. Further, the convex portion 60d of the holder 60 fits into the hole 17c of the second cover member 17. In this way, the first cover member 16, the holder 60, and the second cover member 17 are connected to each other in a positioned state. Further, the guide groove 637 is opened as a hole 638 between the holder 60 and the second cover member 17.

The through hole 17f of the second cover member 17, the through hole 60f of the holder 60, and the through hole 17f of the second cover member 17 are screws 19 that are fixed to the frame of the device when the actuator 1 is mounted on various devices. Is stopped. In this embodiment, when the screws 18 and 19 are stopped, the heads of the screws 18 and 19 do not protrude from the second cover member 17 to the other side Z2 in the first direction Z.

(Treatment of the end of coil 7)
In the actuator 1 configured in this way, as shown in FIGS. 1 and 2, the cover 11 used for the support 2 has a first side surface 111 located on the outer surface side 110 and on one side X1 of the second direction X. The second side surface 112 is located on the other side X2 of the second direction X, the third side surface 113 is located on one side Y1 of the third direction Y, and the fourth side surface is located on the other side Y2 of the third direction Y. It has a side surface 114. Here, the length of the third side surface 113 and the fourth side surface 114 in the second direction X is longer than the length of the first side surface 111 and the second side surface 112 in the third direction Y. In the present embodiment, a wiring board 15 to which the first end 706 at the start of winding and the second end 707 at the end of winding of the coil wire constituting the coil 7 are electrically connected is fixed to the third side surface 113. Has been done.

In this embodiment, since the guide groove 637 is formed in the holder 60, when fixing to the coil holding holes 66 and 67 of the holder 60, the first end portion 706 at the start of winding and the second end portion 707 at the end of winding are formed. It is pulled out through the guide groove 637, and then the first cover member 16, the holder 60, and the second cover member 17 are overlapped and connected in the first direction Z. As a result, the first end portion 706 and the second end portion 707 are in a state of being pulled out from the hole 638.

Therefore, after the first cover member 16, the holder 60, and the second cover member 17 are overlapped and connected in the first direction Z, the wiring board 15 can be fixed to the recesses 168, 630, and 178. At that time, the convex portion 636 of the holder 60 is fitted into the positioning hole 155 of the wiring board 15, the wiring board 15 is positioned, and then the wiring board 15 is fixed with an adhesive or the like. Therefore, the coil 7 can be driven from the outside via the wiring board 15. Here, since the wiring board 15 is formed with a notch 150 for opening the hole 638, the first end portion 706 and the second end portion 707 drawn out from the hole 638 are passed through the notch 150 and the wiring board. It extends to each of the 15 lands 151 and is soldered to the lands 151. As a result, the two coils 7 are electrically connected in series. The two coils 7 may be electrically connected in parallel.

(Structure of movable body 3)
As shown in FIGS. 2, 4, 5, 6 and 7, the movable body 3 has a first plate portion 860 that faces the coil 7 on one side Z1 of the first direction Z. It has a yoke 86 and a second yoke 87 provided with a second plate portion 870 facing the coil 7 on the other side Z2 of the first direction Z, and the magnet 8 is the first of the first yoke 86. It is held on at least one of the surface of the plate portion 860 facing the coil 7 and the surface of the second yoke 87 facing the coil 7 of the second plate portion 870, and faces the coil 7 in the first direction Z.

In this embodiment, as the magnet 8, the first magnet 81 fixed to the surface of the first plate portion 860 of the first yoke 86 facing the coil 7 by an adhesive or the like, and the second plate portion 870 of the second yoke 87 A second magnet 82 fixed by a method such as adhesion is provided on the surface of the coil 7 facing the coil 7. In this state, the first magnet 81 faces the long side 701 of the coil 7 on one side Z1 of the first direction Z, and the second magnet 82 faces the long side 701 of the coil 7 on the other side Z2 of the first direction Z. Are facing each other. The first magnet 81 and the second magnet 82 are each polarized and magnetized in the thickness direction (first direction Z), and the surface of the first magnet 81 facing the coil 7 and the coil 7 of the second magnet 82 The opposing surfaces are magnetized to different poles. In this embodiment, the first magnet 81 and the second magnet 82 are each composed of four magnets facing each of the four long sides 701 of the two coils 7 (coils 71 and 72).

In the present embodiment, the first yoke 86 extends from the first plate portion 860 toward the other side Z2 in the first direction Z to a position overlapping the second yoke 87, and is connected to the second yoke 87. The plate portion 861 extends from the first plate portion 860 to the other side Z2 in the first direction Z on the side opposite to the first connecting plate portion 861 with respect to the first magnet 81 until it overlaps with the second yoke 87. A second connecting plate portion 862 connected to the second yoke 87 is provided. The first connecting plate portion 861 and the second connecting plate portion 862 are each bent from the ends of the first plate portion 860 located on opposite sides of the second direction X toward the other side Z2 of the first direction Z. .. Therefore, the first connecting plate portion 861 extends to the coil 7 through one side X1 of the second direction X toward the other side Z2 of the first direction Z, and the second connecting plate portion 862 extends to the other side Z2 of the first direction Z. It extends to the coil 7 through the other side Z2 of the second direction X and toward the other side Z2 of the first direction Z. At that time, the first connecting plate portion 861 extends with respect to the coil 7 on one side X1 of the second direction X through the first opening 601 of the holder 60 toward the other side Z2 of the first direction Z. , The second connecting plate portion 862 extends through the second opening 602 of the holder 60 toward the other side Z2 of the first direction Z at the other side Z2 of the second direction X with respect to the coil 7. ..

In this embodiment, the first connecting plate portion 861 and the second connecting plate portion 862 are connected to the end portion of the second yoke 87 by welding. More specifically, the end portion 861a of the other side Z2 of the first direction Z of the first connecting plate portion 861 overlaps with the first side surface 871 of the second plate portion 870 of the second yoke 87, and the first connecting plate portion The 861 and the first side surface 871 of the second yoke 87 are welded together. Similarly, the end portion of the second connecting plate portion 862 on the other side Z2 in the first direction Z overlaps the second side surface 872 of the second plate portion 870 of the second yoke 87, and the second connecting plate portion 862 and the second connecting plate portion 862 and the second connecting plate portion 862. The second side surface 872 of the yoke 87 is welded.

One of the end portion 861a of the first connecting plate portion 861 and the first side surface 871 is formed with a convex portion welded by fitting into the concave portion formed in the other, and the end portion of the second connecting plate portion 862. One of the 862a and the second side surface 872 is formed with a convex portion welded by fitting into the concave portion formed on the other side. In this embodiment, the convex portion 873 formed in the second plate portion 870 is fitted into the concave portion 863 formed in the end portion 861a of the first connecting plate portion 861 and welded, and the convex portion formed in the second plate portion 870. The 874 is fitted and welded to the recess 864 formed in the end portion 862a of the second connecting plate portion 862.

(Assembly process of actuator 1)
FIG. 8 is a plan view of the first cover member 16, the first yoke 86, the holder 60, and the second yoke 87 shown in FIG. 2 in a state of being overlapped in the first direction Z. In the present embodiment, in the first yoke 86, the width of the first connecting plate portion 861 and the second connecting plate portion 862 in the third direction Y is narrower than the width of the first plate portion 860 in the third direction Y, and at least the first one. There is a notch 869 in a portion overlapping the through hole 16a of the cover member 16 and the notch 603 of the holder 60. Further, in the second yoke 87, the width of the portions 876 and 877 connected to the first connecting plate portion 861 and the second connecting plate portion 862 in the third direction Y is larger than the width of the second plate portion 870 in the third direction Y. There is a notch 879 that is narrow and overlaps with at least the through hole 16a of the first cover member 16 and the notch 603 of the holder 60. Therefore, when the first cover member 16, the first yoke 86, the holder 60, and the second yoke 87 are overlapped in the first direction Z, as shown in FIG. 8, the through hole 16a and the first yoke of the first cover member 16 The through hole 13 is formed by the notch 869 of 86, the notch 603 of the holder 60, and the notch 879 of the second yoke 87.

Therefore, if the positioning pin 10 is passed through the through hole 16a of the first cover member 16, the first yoke 86, the holder 60, and the second yoke 87 are sequentially stacked in the first direction Z with reference to the positioning pin 10. , The notch 869 of the first yoke 86, the notch 603 of the holder 60, and the notch 879 of the second yoke 87 can be aligned so that the first cover member 16, the first yoke 86, the holder 60, and The second yoke 87 can be properly overlapped in the first direction Z.

(Composition of stopper)
As shown in FIG. 2, in the present embodiment, the first cover member 16 is on one side X1 of the second direction X with respect to the first connecting plate portion 861 of the first yoke 86 used for the movable body 3. The inner surfaces of the wall portion 161, the first wall portion 61 of the holder 60, and the first wall portion 171 of the second cover member 17 face each other in a state of forming a continuous flat surface (first contacted portion 118). .. Therefore, the first connecting plate portion 861 comes into contact with the first contacted portion 118 when the movable body 3 moves to one side X1 of the second direction X, and the first connecting plate portion 861 abuts on one side X1 of the second direction X of the movable body 3. It constitutes a first stopper that regulates the movable range to.

Similarly, on the other side X2 of the second direction X with respect to the second connecting plate portion 862, the second wall portion 162 of the first cover member 16, the second wall portion 62 of the holder 60, and the second cover member 17 The inner surfaces of the second wall portion 172 of the above face each other in a state of forming a continuous flat surface (second contacted portion 119).
Therefore, when the movable body 3 moves to the other side X2 of the second direction X, the second connecting plate portion 862 comes into contact with the second contacted portion 119 and comes into contact with the other side X2 of the movable body 3 in the second direction X. It constitutes a second stopper that regulates the movable range to.

(Structure of Connection 90 and Viscoelastic Member 9)
As shown in FIGS. 2, 4 and 5, a connecting body 90 having at least one of elasticity and viscoelasticity is provided for the support 2 and the movable body 3. In the present embodiment, the connecting body 90 is a viscoelastic member 9 provided at a position where the support body 2 and the movable body 3 face each other in the first direction Z, and the first direction Z, the second direction X, and the third direction Z. It can be elastically deformed in the Y direction. Viscoelasticity is a property that combines both viscosity and elasticity, and is a property that is prominently found in polymer substances such as gel-like members, plastics, and rubber. Therefore, various gel-like members can be used as the viscoelastic member 9. Further, as the viscoelastic member 9, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber), chloroprene rubber, acrylonitrile / butadiene rubber, etc.), non-diene rubber (for example, butyl rubber, ethylene, etc.) Various rubber materials such as propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluororubber, etc., and thermoplastic elastomers, and modified materials thereof may be used.

In this embodiment, only the viscoelastic member 9 is connected to both the support 2 and the movable body 3 as the connecting body 90. In the present embodiment, as the viscoelastic member 9, the first viscoelastic member 91 is arranged and movable at a position where the first yoke 86 of the movable body 3 and the first cover member 16 of the support 2 face each other in the first direction Z. The second viscoelastic member 92 is arranged at a position where the second yoke 87 of the body 3 and the second cover member 17 of the support 2 face each other in the first direction Z. More specifically, two first viscoelastic members 91 are arranged between the first plate portion 860 of the first yoke 86 and the bottom portions of the recesses 166 and 167 of the first cover member 16, and the second viscoelastic member 91 is arranged. Two members 92 are arranged between the second plate portion 870 of the second yoke 87 and the bottom portions of the recesses 176 and 177 of the second cover member 17.

Here, the first viscoelastic member 91 is arranged in a state of being compressed in the first direction Z between the first plate portion 860 of the first yoke 86 and the bottom portions of the recesses 166 and 167 of the first cover member 16. , The second viscoelastic member 92 is arranged in a state of being compressed in the first direction Z between the second plate portion 870 of the second yoke 87 and the bottom portions of the recesses 176 and 177 of the second cover member 17. .. The first viscoelastic member 91 is adhered to a surface in contact with the support 2 (bottoms of recesses 166 and 167 of the first cover member 16) and is adhered to a surface in contact with the movable body 3 (first yoke 86). The second viscoelastic member 92 is adhered to the surface in contact with the support 2 (the bottom of the recesses 176 and 177 of the second cover member 17) and is adhered to the surface in contact with the movable body 3 (second yoke 87).

In the present embodiment, the viscoelastic member 9 (first viscoelastic member 91 and second viscoelastic member 92) is a silicone-based gel having a needle insertion degree of 10 to 110 degrees. The degree of needle insertion is defined by JIS-K-2207 and JIS-K-2220, and the smaller this value is, the harder it is. The viscoelastic member 9 has linear or non-linear stretching characteristics depending on the stretching direction thereof. For example, the viscoelastic member 9 has a stretch characteristic in which a non-linear component (spring constant) is larger than a linear component (spring constant) when it is pressed in the thickness direction (axial direction) and compressively deformed. On the other hand, when it is pulled and stretched in the thickness direction (axial direction), it has a stretch characteristic in which the linear component (spring constant) is larger than the non-linear component (spring coefficient). On the other hand, when the viscoelastic member 9 is deformed in the direction intersecting the thickness direction (axial direction) (shearing direction) as in the present embodiment, the deformation is in the direction of being pulled and stretched regardless of the direction of movement. Therefore, the linear component (spring constant) has a larger deformation characteristic than the non-linear component (spring constant). Therefore, in the viscoelastic member 9, the spring force depending on the direction of movement is constant. Therefore, by using the spring element in the shear direction of the viscoelastic member 9 as in this embodiment, the reproducibility of the vibration acceleration with respect to the input signal can be improved, and the vibration with a delicate nuance is realized. be able to.

(basic action)
In the actuator 1 of the present embodiment, when an alternating current is applied to the coil 7, the movable body 3 vibrates in the second direction X, so that the center of gravity of the actuator 1 fluctuates in the second direction X. Therefore, the user can experience the vibration in the second direction X. At that time, by adjusting the AC waveform applied to the coil 7, the acceleration at which the movable body 3 moves to one side X1 of the second direction X and the acceleration at which the movable body 3 moves to the other side X2 in the second direction are adjusted. If they are different, the user can experience the directional vibration in the second direction X.

(Main effect of this form)
As described above, in the actuator 1 of the present embodiment, the first yoke 86 and the second yoke 87 are arranged on both sides of the first direction Z with the coil 7 interposed therebetween, and the first yoke 86 and the second yoke 87 are the first. The magnet 81 and the second magnet 82 are fixed. Even in such a configuration, in the present embodiment, since the first yoke 86 includes the first connecting plate portion 861 and the second connecting plate portion 862 extending toward the second yoke 87, it is in the first direction Z. On the other side Z2 (the side where the second yoke 87 is located), the first connecting plate portion 861 and the second yoke 87 can be connected, and the second connecting plate portion 862 and the second yoke 87 can be connected. Therefore, it is possible to efficiently manufacture a yoke in which the magnet 8 is fixed to the surfaces facing each other in the first plate portion 860 and the second plate portion 870. In particular, in this embodiment, since the first connecting plate portion 861 and the second connecting plate portion 862 are connected to the second yoke 87 by welding, only the other side Z2 in the first direction Z needs to be welded. It can be done efficiently.

Further, since the first connecting plate portion 861 and the second connecting plate portion 862 are each bent from the ends located on the opposite sides of the first plate portion 860 toward the other side Z2 in the first direction Z, the first connecting plate portion 861 and the second connecting plate portion 862 are bent. 1 York 86 can be manufactured efficiently. Further, the convex portion 873 formed in the second plate portion 870 is fitted into the concave portion 863 formed in the end portion 861a of the first connecting plate portion 861 and welded, and the convex portion 874 formed in the second plate portion 870 is formed. It is fitted and welded to the recess 864 formed in the end portion 862a of the second connecting plate portion 862. Therefore, the first yoke 86 and the second yoke 87 can be coupled in a state of being positioned by the concave portions 863 and 864 and the convex portions 873 and 874.

Further, the first wall portion (first cover member 16) in which the first contacted portion 118 and the second contacted portion 119 that regulate the movable range when the movable body 3 moves in the second direction X have a wide width dimension. The first wall portion 161 of the above, the first wall portion 61 of the holder 60, and the first wall portion 171 of the second cover member 17), and the second wall portion (second wall portion 162 of the first cover member 16, holder 60). The second wall portion 62 and the second wall portion 172 of the second cover member 17 are formed. Therefore, the strength of the first contacted portion 118 and the second contacted portion 119 is high. Even when the movable body 3 suddenly moves in the second direction X due to an impact at the time of dropping or the like, the first contacted portion 118 and the second contacted portion 119 are less likely to be damaged.

Further, in the present embodiment, since the viscoelastic member 9 is arranged at the portion where the support 2 and the movable body 3 face each other in the first direction Z, the resonance when the movable body 3 is driven is suppressed by the viscoelastic member 9. can do. At that time, since the viscoelastic member 9 is deformed in the shearing direction, the viscoelastic member 9 has a deformation characteristic in which the linear component is larger than the non-linear component. Therefore, since the reproducibility of the vibration acceleration with respect to the input signal can be improved, the vibration can be realized with a delicate nuance. Further, in the present embodiment, since the support 2 includes a plurality of members (first cover member 16, holder 60, and second cover member 17) laminated in the first direction Z, the support 2 and the movable body 3 are provided. Although the distance between the parts facing each other in the first direction Z is likely to vary, the viscoelastic member 9 is arranged in a compressed state in the first direction Z, so that the viscoelastic member 9 is movable with the support 2. Always in contact with body 3. Therefore, the viscoelastic member 9 reliably follows the movement of the movable body 3. Further, since the surface of the viscoelastic member 9 in contact with the support 2 is adhered to the support 2 and the surface in contact with the movable body 3 is adhered to the movable body 3, the position of the viscoelastic member 9 is unlikely to shift. Therefore, the viscoelastic member 9 reliably follows the movement of the movable body 3.

Further, the first cover member 16, the holder 60, and the second cover member 17 are fastened in the first direction Z by a screw 18 having a screw shaft extending in the first direction Z. Therefore, the viscoelastic member 9 can be compressed in the first direction Z when the first cover member 16, the holder 60, and the second cover member 17 are fastened by tightening the screw 18. Further, since the portions of the first cover member 16 and the second cover member 17 of the support 2 in contact with the viscoelastic member 9 are recesses 166, 167, 176, and 177, the position of the viscoelastic member 9 is unlikely to shift.

Further, since the first end portion 706 and the second end portion 707 of the coil wire used for the coil 7 are electrically connected to the wiring board 15 fixed to the support 2, the first end of the coil wire is in a state of being electrically connected. It is unlikely that the portion 706 and the second end portion 707 are pulled and the coil 7 is damaged. Further, since the wiring board 15 is fixed to the third side surface 113 of the side surface of the support 2, which corresponds to the long side when viewed from the first direction Z, the wiring board 15 having a long dimension can be used. .. Therefore, regardless of the orientation, position, number, etc. of the coils 7, electricity can be easily supplied to the wiring board 15 without having to route the first end portion 706 and the second end portion 707 of the coil 7 over a long distance. It is possible to properly process the end portion of the coil 7, such as being able to connect the coil 7 in an appropriate manner.

Further, a hole 638 through which the first end portion 706 and the second end portion 707 are passed is formed in the third side surface 113 of the support 2, and the hole 638 is connected to the guide groove 637 of the holder 60. Therefore, the first end portion 706 and the second end portion 707 can be guided to the wiring board 15 through the guide groove 637 and the hole 638, so that the first end portion 706 and the second end portion 707 are routed to the wiring board 15. Is easy.

(Other embodiments)
In the above embodiment, two magnets 8 (first magnet 81 and second magnet 82) are provided, but for example, the magnet 8 is arranged only on one side Z1 of the first direction Z with respect to the coil 7. The present invention may be applied in the case where only the second yoke 87 is present on the other side Z2 of the first direction Z.

In the above embodiment, a gel-like member such as a silicone-based gel is used as the viscoelastic member 9, but rubber or the like may be used as the viscoelastic member. Further, in the above embodiment, the viscoelastic member 9 is used as the connecting body 90, but an elastic member such as a spring may be used.

In the above embodiment, the coil and the holder are provided on the support 2 and the magnet and the yoke are provided on the movable body 3, but the coil and the holder are provided on the movable body 3 and the magnet and the yoke are provided on the support 2. If so, the present invention may be applied. In the above embodiment, the present invention is applied to the actuator 1 that drives the movable body 3 only in the second direction X, but the present invention is applied to the actuator 1 that drives the movable body 3 in the second direction X and the third direction Y. You may.

1 ... Actuator, 2 ... Support (one side member), 3 ... Movable body (other side member), 6 ... Magnetic drive circuit, 7, 71, 72 ... Coil, 8 ... Magnet, 9 ... Viscoelastic member (connector) ), 10 ... Positioning pin, 11 ... Cover, 15 ... Wiring board, 16 ... First cover member, 16a, 16b, 16e, 16f, 17e, 17f, 60e, 60f ... Through hole, 16c, 17c, 155, 638 ... Holes, 17 ... 2nd cover members, 18, 19 ... Screws, 60 ... Holders, 60c, 60d, 636, 873, 874 ... Convex parts, 61, 161, 171 ... First wall parts, 62, 162, 172 ... 2 wall part, 63, 163, 173 ... 3rd wall part, 64, 164, 174 ... 4th wall part, 66, 67 ... Coil holding hole, 81 ... 1st magnet, 82 ... 2nd magnet, 86 ... 1st York, 87
... second yoke, 90 ... connector, 91 ... first viscoelastic member, 92 ... second viscoelastic member, 110 ... outer surface side, 111 ... first side surface, 112 ... second side surface, 113 ... third side surface, 114 ... 4th side surface, 118 ... 1st contacted portion 119 ... 2nd contacted portion, 601 ... 1st opening, 602 ... 2nd opening, 637 ... guide groove, 661, 671 ... receiving portion, 701 ... long side, 702 ... short side, 706 ... first end, 707 ... second end, 860 ... first plate, 861 ... first connecting plate, 862 ... second connecting plate, 870 ... second Plate part, X ... 2nd direction, Y ... 3rd direction, Z ... 1st direction

Claims (14)

With the support
Movable body and
A connector that is connected to the movable body and the support and has at least one of elasticity and viscoelasticity.
A magnetic drive circuit provided with a coil and a first magnet facing the coil in the first direction, and moving the movable body relative to the support in a second direction intersecting the first direction.
Have,
The support includes a first wall portion facing the movable body on one side in the second direction, a second wall portion facing the movable body on the other side in the second direction, and the movable body. It has a third wall portion facing the first direction and one side of the third direction intersecting with the second direction, and a fourth wall portion facing the movable body on the other side of the third direction. death,
The width of the first wall portion and the second wall portion in the second direction is wider than the width of the third wall portion and the fourth wall portion in the third direction.
The first wall portion comes into contact with the movable body when the movable body moves to one side in the second direction, and regulates the movable range of the movable body to one side in the second direction. Equipped with a contacted part,
The second wall portion comes into contact with the movable body when the movable body moves to the other side in the second direction, and regulates the movable range of the movable body to the other side in the second direction. An actuator characterized by having a contacted portion. The support includes a holder in which the coil or the first magnet is held, a first cover member whose ends overlap each other on one side of the first direction with respect to the holder, and the holder. A second cover member whose ends overlap each other on the other side of the first direction is provided.
1. The first wall portion and the second wall portion each include a portion in which the holder, the first cover member, and the second cover member overlap in the first direction. The actuator described in. The holder and the first cover member are formed with a positioning convex portion that protrudes from one side toward the other and fits into the positioning hole formed in the other side.
2. The second cover member is characterized in that a positioning convex portion is formed on the holder and the second cover member so as to project from one side toward the other side and fit into the positioning hole formed in the other side. The actuator described. The coil is provided on the support side in a state of being held by the holder.
The first magnet is provided on the movable body and is provided on the movable body.
The movable body has a first yoke having a first plate portion facing the coil on one side in the first direction, and a second plate facing the coil on the other side in the first direction. Has a second yoke with a part,
The first magnet is fixed to one of the surface of the first plate portion facing the coil and the surface of the second plate portion facing the coil.
The first yoke extends from the first plate portion on one side of the second direction to the coil so as to overlap with the second yoke from the first plate portion toward the other side in the first direction. The first connecting plate portion connected to the yoke extends from the first plate portion to the other side in the first direction on the other side of the second direction with respect to the coil to a position where it overlaps with the second yoke. A second connecting plate portion that is present and connected to the second yoke is provided.
When the movable body moves to one side in the second direction, the first connecting plate portion comes into contact with the first wall portion to regulate the movable range of the movable body to one side in the second direction. death,
When the movable body moves to the other side in the second direction, the second connecting plate portion comes into contact with the second wall portion to regulate the movable range of the movable body to the other side in the second direction. The actuator according to claim 2 or 3. The actuator according to claim 4, wherein the first connecting plate portion and the second connecting plate portion are connected to the second yoke by welding. The holder has a first opening that allows the first connecting plate portion to penetrate between the coil and the first wall portion from one side to the other side in the first direction, and the coil and the second. The fourth or fifth aspect of the present invention, wherein a second opening is formed between the wall portion and the second connecting plate portion so as to penetrate the second connecting plate portion from one side to the other side in the first direction. Actuator. The magnetic drive circuit is characterized by including a second magnet fixed to the other side of the surface of the first plate portion facing the coil and the surface of the second plate portion facing the coil. The actuator according to any one of claims 4 to 6. In a state where the first cover member, the first yoke, the holder and the second yoke are overlapped in the first direction, the first cover member, the first yoke, the holder and the second yoke are penetrated. The actuator according to any one of claims 4 to 7, wherein a through hole is formed. The actuator according to any one of claims 1 to 8, wherein a viscoelastic member is used as the connecting body. The actuator according to claim 9, wherein only the viscoelastic member is used as the connecting body. The actuator according to claim 9 or 10, wherein the viscoelastic member is fixed to both the movable body and the support. The actuator according to any one of claims 9 to 11, wherein the viscoelastic member is a gel-like member. The actuator according to claim 12, wherein the gel-like member is a silicone-based gel. The actuator according to any one of claims 9 to 13, wherein the viscoelastic member is arranged at a position where the support and the movable body face each other in the first direction. ..

Images