Actuator

Abstract

To suppress pendulum motion of a movable body while securing an arrangement space of a connection body connecting the movable body to a support body.SOLUTION: An actuator 1 includes: a movable body 5 including a magnet 7 and a yoke 8; and a support body 3 including a case 2 and a coil 10. The actuator vibrates the movable body 5 in an X direction. The yoke 8 includes a first opposing part 801 and a second opposing part 802 opposing the coil 10 from both sides in a Z direction. A pair of second coupling plate parts 805 extending in a Z1 direction from both ends of the second opposing part 802 in the X direction is fitted inside a pair of first coupling plate parts 804 extending in a Z2 direction from both ends of the first opposing part 801 in the X direction. In the yoke 8, both sides in the X direction of a pair of first connection bodies 9A connecting a first plate 11 covering the coil 10 from the Z1 direction and the first opposing part 801, and both sides in the X direction of a pair of first connection bodies 9B connecting a second plate 12 covering the coil 10 from the Z2 direction and the second opposing part 802, are cut off.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an actuator that vibrates a movable body. [Background technology]

[0002] Patent Document 1 discloses an actuator that includes a movable body with a magnet and a support body with a coil, and that vibrates the movable body relative to the support body by passing a drive current through the coil. This type of actuator uses an elastic or viscoelastic body as a connector that connects the support body and the movable body. When the movable body is vibrated, a reaction force corresponding to the vibration of the movable body is applied to the support body via the connector. As a result, a user who touches the support body can feel the vibration.

[0003] In the actuator of Patent Document 1, the support body includes a metal case that defines the outer shape of the actuator and a resin coil holder. The coil is an air-core coil that is placed in a coil placement hole provided in the coil holder. Metal plates are attached to the coil holder so as to cover the plate portion provided with the coil placement hole and the coil from both sides.

[0004] The movable body includes a first yoke facing the coil from one side in the first direction and a second yoke facing the coil from the other side in the first direction, and magnets are fixed to the first yoke and the second yoke, respectively. The first yoke includes a pair of connecting parts that bend and extend from both ends in a second direction (the direction in which the movable body vibrates) that intersects with the first direction toward the second yoke, and the connecting parts of the first yoke are joined to both ends of the second yoke in the second direction by welding or the like. The connecting parts are arranged at both ends in the longitudinal direction of the movable body (a third direction that intersects with the first and second directions) where the plate covering the coil and the yoke face each other. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-102901 Summary of the Invention [Problem to be solved by the invention]

[0006] When using an actuator as a haptic device that makes a user who touches a support feel vibrations, the acceleration of the vibration of the movable body can be increased to make the user feel a strong vibration. For example, it has been proposed to increase the acceleration of the vibration of the movable body by increasing the weight of the movable body.

[0007] For example, in the yoke of Patent Document 1, it is proposed to increase the weight of the yoke by providing bent plate portions that bend from both ends of the first yoke in the second direction toward the second yoke at both ends in the longitudinal direction (third direction) of the movable body where the connecting body is arranged, and by providing bent plate portions that bend from both ends of the second yoke in the second direction toward the first yoke.

[0008] However, if the size of the movable body increases due to such a change in the shape of the yoke, the outer dimensions of the actuator may become larger than the required size. Furthermore, if the weight of the movable body is increased without changing the outer dimensions of the actuator and an attempt is made to ensure space for the movable body to vibrate, it may become difficult to ensure space for arranging the connecting body. For example, if bending plate portions are provided on both sides of the connecting body in the second direction (the direction in which the movable body vibrates) as described above, the space for arranging the connecting body in the second direction will be reduced.

[0009] If the width of the connector in the direction in which the movable body vibrates (the second direction in Patent Document 1) is small, When the movable body vibrates, it does not move in a straight line but swings like a pendulum, which causes the vibration of the movable body to become unstable and may collide with the support. If the gap between the movable body and the fixed body is increased to avoid the collision, the thrust force of the magnetic drive circuit will decrease and it will no longer be possible to generate large vibrations.

[0010] In view of the above problems, the object of the present invention is to suppress the pendulum motion of the movable body by achieving both suppression of the size increase of the actuator and securing the weight of the movable body, and by securing the space for arranging the connecting body. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, an actuator of the present invention includes a movable body, a support body including a case and a coil holder for accommodating the movable body, a connector connected to the movable body and the support body, a coil held by the coil holder, and a magnet facing the coil in a first direction, and a magnetic drive circuit that vibrates the movable body relative to the support body in a second direction that intersects the first direction, wherein the support body includes a first metal plate that overlaps the coil from one side in the first direction, and a second metal plate that overlaps the coil from the other side in the first direction, and the movable body includes a yoke that holds the magnet, and the yoke includes a first opposing portion that faces the first plate from one side in the first direction, and a second metal plate that extends from both ends of the first opposing portion in the second direction to a front side. The present invention is characterized in that the connector has a first yoke having a pair of first connecting plate portions extending to the other side in the first direction, a second opposing portion facing the second plate from the other side in the first direction, and a second yoke having a pair of second connecting plate portions extending from both ends of the second opposing portion in the second direction to one side in the first direction, wherein the other of the pair of first connecting plate portions and the pair of second connecting plate portions is arranged inside one of the pair of first connecting plate portions and the pair of second connecting plate portions, and when a direction intersecting the first direction and intersecting the second direction is defined as a third direction, the connector has a pair of first connecting bodies connecting the first plate to each of a pair of first connecting body fixing portions provided at both ends of the first opposing portion in the third direction, and the yoke is cut out on both sides in the second direction of the first connecting body.

[0012] According to the present invention, the connector (first connector) is disposed inside the yoke (at a position where the first plate and the first connector fixing portion face each other), and the yoke is cut out on both sides of the first connector in the second direction. This allows the width of the space in the second direction in which the first connector can be disposed to be increased without increasing the outer shape of the movable body, thereby increasing the length of the first connector in the second direction. Furthermore, since the yoke is configured by laminating the first connecting plate portion and the second connecting plate portion at the portions disposed on both sides of the coil in the second direction, the weight of the movable body can be ensured even when both sides of the first connector in the second direction are cut out. Therefore, it is possible to avoid an increase in the size of the actuator while ensuring the weight of the movable body, and also ensure the length of the first connector in the second direction. This prevents the movable body from swinging like a pendulum instead of moving straight when vibrating (pendulum motion).

[0013] In the present invention, it is preferable that the connector includes a pair of second connectors connecting the second plate to a pair of second connector fixing portions provided at both ends of the second opposing portion in the third direction, and that the yoke is cut out on both sides of the second connector in the second direction. In this way, as with the first connector, the length in the second direction of the second connector can be ensured without increasing the outer shape of the movable body. Therefore, it is possible to avoid an increase in the size of the actuator while ensuring the weight of the movable body, and to improve the effect of suppressing pendulum motion when the movable body vibrates.

[0014] In the present invention, the coil holder includes a first holder member including a first coil holding portion disposed on one side of the coil in the third direction, and a first holder side plate portion extending in the first direction from an end of the first coil holding portion on one side of the third direction, and a first holder side plate portion disposed on the other side of the coil in the third direction. and a second holder member including a second coil holding portion disposed on the other side in the third direction and a second holder side plate extending in the first direction from the end of the second coil holding portion on the other side in the third direction, wherein the widths of the first coil holding portion and the second coil holding portion in the second direction are preferably greater than the width of the coil in the second direction, and the pair of first connecting bodies and the pair of second connecting bodies overlap the first coil holding portion and the second coil holding portion from one side in the first direction. By dividing the coil holder into two members in the third direction, resin portions covering both sides of the coil in the second direction are not required, thereby reducing the external dimensions of the actuator in the second direction. Alternatively, the coil can be enlarged without increasing the external dimensions of the actuator, thereby increasing the thrust of the magnetic drive circuit and generating large vibrations. Furthermore, since the first coil holding portion and the second coil holding portion have large dimensions in the second direction, space can be secured to attach connecting bodies that are long in the second direction.

[0015] In the present invention, the yoke preferably includes a pair of connecting portions extending in the first direction on both sides of the coil in the second direction and connecting the first opposing portion and the second opposing portion, each of the pair of connecting portions being configured by stacking the first connecting plate portion and the second connecting plate portion, the first coil holding portion being disposed in a first notch formed by cutting out an edge of each of the pair of connecting portions on one side in the third direction when viewed from the second direction, and the second coil holding portion being disposed in a second notch formed by cutting out an edge of each of the pair of connecting portions on the other side in the third direction when viewed from the second direction. This configuration can avoid interference between the first coil holding portion and the second coil holding portion and the yoke even when the widths of the first coil holding portion and the second coil holding portion in the second direction are increased. Therefore, the width in the second direction of the space in which the first connecting body and the second connecting body can be arranged can be increased without increasing the outer shape of the movable body.

[0016] In the present invention, it is preferable that the first holder member includes a pair of first holder protrusions protruding from both edges of the first holder side plate portion in the second direction toward the other side in the third direction, and the second holder member includes a pair of second holder protrusions protruding from both edges of the second holder side plate portion in the second direction toward one side in the third direction, with one of the pair of first connector fixing portions being disposed between the pair of first holder protrusions and the other of the pair of first connector fixing portions being disposed between the pair of second holder protrusions. In this way, the first holder protrusions and the second holder protrusions function as stoppers that restrict the movable body's range of motion in the second direction. Therefore, since the stopper can be provided on the coil holder rather than the case, the risk of the movable body colliding with the case and being deformed or destroyed by an impact such as a drop can be reduced. This improves the impact resistance of the actuator.

[0017] In the present invention, it is preferable that the case has a first case member including a first end plate portion facing the movable body from one side in the first direction and a pair of first case side plates extending from both edges of the first end plate portion in the second direction to the other side in the first direction, and the first holder protrusion and the second holder protrusion are press-fitted between the pair of first case side plates. In this way, rattle of the coil holder relative to the case can be suppressed by utilizing a portion that functions as a stopper. Furthermore, since the coil holder can be fixed to the case without using adhesive, assembly can be improved.

[0018] In the present invention, the first plate and the second plate each include a central plate portion disposed between the pair of connecting portions and overlapping the coil, one side plate portion extending from the central plate portion to one side in the third direction and overlapping the first coil holding portion, and another side plate portion extending from the central plate portion to the other side in the third direction and overlapping the second coil holding portion, and both ends of the central plate portion in the second direction are provided with central bent portions that bend in the first direction and cover the side surfaces of the coil in the second direction, and the widths of the one side plate portion and the other side plate portion in the second direction are larger than the width of the central plate portion in the second direction, and one of the pair of first connecting bodies is provided with the first bent portion. Preferably, the first and second plates are connected to the one side plate portion of the first plate, and the other of the pair of first connectors is connected to the other side plate portion of the first plate. This ensures that there is space at both ends of the first and second plates in the third direction to attach first connectors and second connectors that are longer in the second direction. In addition, because the coil can be protected by the first and second plates, there is little risk of the coil being damaged by collision with a magnet or a yoke.

[0019] In the present invention, it is preferable that the length of the first connector in the second direction is greater than the width of the central plate in the second direction. In this way, by increasing the length of the first connector in the second direction, it is possible to enhance the effect of suppressing pendulum motion when the movable body vibrates.

[0020] In the present invention, it is preferable that both ends of the one side plate portion of the first plate in the second direction and both ends of the other side plate portion of the first plate in the second direction are provided with fixing bent portions that are bent toward the other side in the first direction and engaged with end surfaces of the first coil holding portion and the second coil holding portion on both sides in the second direction. In this way, the coil set can be assembled by engaging and positioning the first plate with the first holder member and the second holder member. Therefore, even if the coil holder is divided into two members, the ease of assembly of the actuator can be prevented from decreasing.

[0021] In the present invention, it is preferable that the first yoke includes a flat first inner member overlapping the coil from one side in the first direction and a first outer member overlapping the first inner member from one side in the first direction, and the second yoke includes a flat second inner member overlapping the coil from the other side in the first direction and a second outer member overlapping the second inner member from the other side in the first direction. In this way, the thickness of the portion facing the coil in the first direction increases due to the two overlapping members, thereby increasing the weight of the yoke. Furthermore, the weight of the yoke can be increased by using a general-purpose member with a plate thickness, thereby avoiding an increase in the cost of parts. [Effects of the Invention]

[0022] According to the present invention, the connector (first connector) is disposed inside the yoke (at a position where the first plate and the first connector fixing portion face each other), and the yoke is cut out on both sides of the first connector in the second direction. This allows the width of the space in the second direction in which the first connector can be disposed to be increased without increasing the outer shape of the movable body, thereby increasing the length of the first connector in the second direction. Furthermore, since the yoke is configured by laminating the first connecting plate portion and the second connecting plate portion at the portions disposed on both sides of the coil in the second direction, the weight of the movable body can be ensured even when both sides of the first connector in the second direction are cut out. Therefore, it is possible to avoid an increase in the size of the actuator while ensuring the weight of the movable body, and also ensure the length of the first connector in the second direction. This prevents the movable body from swinging like a pendulum instead of moving straight when vibrating (pendulum motion). [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of an actuator to which the present invention is applied, as viewed from the Z2 direction and the Z1 direction. [Figure 2] FIG. 2 is an exploded perspective view of the actuator in which the support body is disassembled into a coil assembly, a first case member, and a second case member. [Figure 3]FIG. 1(a) is a cross-sectional view of the actuator taken along the YZ plane (a cross-sectional view taken along the line AA in FIG. 1(a)). [Figure 4] FIG. 1(a) is a cross-sectional view of the actuator taken along the XZ plane (a cross-sectional view taken along the BB position in FIG. 1(a)). [Figure 5] FIG. 10 is an exploded perspective view of the movable body and the coil set as viewed from the Z2 direction. [Figure 6] FIG. 10 is an exploded perspective view of the movable body and the coil set as viewed from the Z1 direction. [Figure 7] FIG. [Figure 8] FIG. 2 is a plan view of the coil holder and the coil. [Figure 9] 4 is a cross-sectional view of the actuator cut in the XY plane (a cross-sectional view cut at the CC position in FIG. 3) and a partially enlarged view thereof. [Figure 10] FIG. 4 is a cross-sectional view of the actuator (a cross-sectional view taken along the line DD in FIG. 3) showing the planar shape and arrangement of the connecting body. [Figure 11] 10 is a side view of the movable body, the connecting body, and the coil set as viewed from the X2 direction. FIG. [Figure 12] 10 is a cross-sectional view of the actuator taken at the position of a press-fitted fixing portion (a cross-sectional view taken at the position EE in FIG. 9). DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of an actuator to which the present invention is applied will be described with reference to the drawings.

[0025] (Overall composition) FIG. 1(a) is a perspective view of an actuator 1 to which the present invention is applied, as viewed from the Z2 direction. FIG. 1(b) is a perspective view of an actuator 1 to which the present invention is applied, as viewed from the Z1 direction. FIG. 2 is an exploded perspective view of the actuator 1, in which the support 3 is disassembled into a coil set 13, a first case member 30, and a second case member 40. FIG. 3 is a cross-sectional view of the actuator 1 taken along the YZ plane, taken at the position AA in FIG. 1(a). FIG. 4 is a cross-sectional view of the actuator 1 taken along the XZ plane, taken at the position BB in FIG. 1(a). FIG. 5 is an exploded perspective view of the movable body 5 and the coil set 13, as viewed from the Z2 direction. FIG. 6 is an exploded perspective view of the movable body 5 and the coil set 13, as viewed from the Z1 direction. FIG. 7 is an exploded perspective view of the coil set 13. FIG. 8 is a plan view of the coil holder 17 and the coil 10. FIG. 9 is a cross-sectional view of the actuator 1 taken along the XY plane and a partially enlarged view thereof, taken at the position CC in FIG. 3.

[0026] The actuator 1 is used as a tactile device that transmits information by vibration. As shown in Figures 1(a) and 1(b), the outer shape of the actuator 1 is a roughly rectangular parallelepiped. The actuator 1 generates vibrations in the short direction of its outer shape. In the following description, the short direction in which vibrations occur is referred to as the X direction (second direction), the longitudinal direction of the actuator 1 and a direction perpendicular to the X direction is referred to as the Y direction (third direction), and the thickness direction (height direction) of the actuator 1 and a direction perpendicular to the X and Y directions is referred to as the Z direction (first direction). One side of the X direction is referred to as the X1 direction, and the other side is referred to as the X2 direction. One side of the Y direction is referred to as the Y1 direction, and the other side is referred to as the Y2 direction. One side of the Z direction is referred to as the Z1 direction, and the other side is referred to as the Z2 direction.

[0027] 1 to 4, the actuator 1 has a support body 3 equipped with a case 2 that defines the outer shape of the actuator 1, and a movable body 5 housed inside the case 2. The actuator 1 also has a connector 4 that connects the support body 3 and the movable body 5, and a magnetic drive circuit 6 (see FIGS. 3 and 4) that moves the movable body 5 relative to the support body 3 in the X direction. As shown in FIG. 3, the connector 4 has a first connector 9A and a second connector 9B.

[0028] As shown in Figures 1 and 2, the support body 3 includes a case 2 and a coil set 13. As shown in Figures 3 and 4, the coil set 13 includes a coil 10 that is disposed at the center of the actuator 1 in the Z direction. The case 2 includes a first case member 30 and a second case member 40 that are stacked in the Z direction. The first case member 30 is assembled to the coil set 13 from the Z1 direction. The second case member 40 is assembled to the coil set 13 and the first case member 30 from the Z2 direction.

[0029] As shown in Figures 3 and 4, the movable body 5 includes a magnet 7 and a yoke 8. As shown, magnet 7 is fixed to the inner surface of yoke 8 configured to surround coil 10. Coil 10 and magnet 7, which face each other in the Z direction, constitute a magnetic drive circuit 6. Movable body 5 is provided with a first magnet 71 and a second magnet 72 as magnets 7. First magnet 71 and second magnet 72 are polarized in two in the X direction. When movable body 5 and support body 3 are assembled, first magnet 71 faces coil 10 in the Z1 direction, and second magnet 72 faces coil 10 in the Z2 direction.

[0030] (Coil assembly) As shown in FIG. 7, the coil set 13 includes a coil 10, a first plate 11 stacked on top of the coil 10 in the Z1 direction, and a second plate 12 stacked on top of the coil 10 in the Z2 direction. The first plate 11 and the second plate 12 are made of a non-magnetic metal. The coil set 13 also includes a first holder member 15 arranged on the Y1 side of the coil 10, and a second holder member 16 arranged on the Y2 side of the coil 10. The first holder member 15 and the second holder member 16 form a coil holder 17. The first holder member 15 and the second holder member 16 are made of resin.

[0031] As shown in Figures 2 and 3, the coil 10 is located at the center of the case 2 in the Z direction. The coil 10 is a flat air-core coil, with its thickness oriented in the Z direction. As shown in Figure 7, the coil 10 has an elliptical shape that is long in the Y direction and includes a pair of long sides 10a, 10b that extend parallel to the Y direction. A central hole 10c extending in the Y direction is provided between the pair of long sides 10a, 10b. The long sides 10a, 10b of the coil 10 face the first magnet 71 and the second magnet 72 in the Z direction.

[0032] 7 and 8, the first holder member 15 includes a first coil holding portion 151 disposed between the first plate 11 and the second plate 12, a first holder side plate 152 extending in the Z1 and Z2 directions from the Y1-side end of the first coil holding portion 151, and a pair of first holder protrusions 153 protruding in the Y2 direction from both ends of the first holder side plate 152 in the X direction. The first coil holding portion 151 includes recesses 154 formed on both side surfaces in the X direction and claws 155 protruding from the centers of each recess 154 in the Y direction. Each of the pair of first holder protrusions 153 extends to a position facing the claws 155 in the X direction.

[0033] A power supply board 14 is fixed to the first holder member 15. In this embodiment, the power supply board 14 is a rigid board. However, the power supply board 14 may also be a flexible printed board. Power is supplied to the coil 10 via the power supply board 14. Two coil wires 10d drawn out from the coil 10 are arranged in a groove 157 formed in the first coil holding part 151, drawn out to the Y1 side of the first holder side plate part 152 from a notch 156 formed by cutting out the central part of the X direction of the first holder side plate part 152 in the Z1 direction, bent toward the Z1 side, and connected to the power supply board 14.

[0034] 7, the power supply board 14 is fixed to a board fixing portion 159 that protrudes from a contact surface 158, which is a side surface on the Y1 side of the first holder side plate portion 152. The board fixing portion 159 surrounds both sides in the X direction and the Z1 side of the notch portion 156 from which the coil wire 10d is drawn out. As shown in FIG. 3, the Z1-side end of the power supply board 14 extends to a position on the Z1 side beyond the Z1-side end of the board fixing portion 159.

[0035] 7 and 8, the second holder member 16 includes a second coil holding portion 161 disposed between the first plate 11 and the second plate 12, a second holder side plate 162 extending in the Z1 and Z2 directions from the Y1-side end of the second coil holding portion 161, and a pair of second holder protrusions 163 protruding in the Y1 direction from both ends of the second holder side plate 162 in the X direction. The second coil holding portion 161 includes recesses 164 formed on both side surfaces in the X direction and claws 165 protruding from the center of the recesses 164 in the Y direction. The pair of second holder protrusions 163 each include , and extends to a position opposite to the claw portion 165 in the X direction.

[0036] The coil 10 is disposed between the first coil holding portion 151 and the second coil holding portion 161. As shown in FIG. 7 , the first plate 11 includes a flat first plate portion 111 that overlaps the coil 10 from the Z1 side. The first plate portion 111 includes a central plate portion 112 that overlaps the long sides 10a and 10b of the coil 10, a first side plate portion 113 that extends from the central plate portion 112 in the Y1 direction and overlaps the first coil holding portion 151, and a second side plate portion 114 that extends from the central plate portion 112 in the Y2 direction and overlaps the second coil holding portion 161. The widths of the first side plate portion 113 and the second side plate portion 114 in the X direction are greater than the width of the central plate portion 112 in the X direction.

[0037] A pair of central bent portions 115 bent in the Z2 direction are provided at both ends in the X direction of the central plate portion 112. A pair of fixing bent portions 116 bent in the Z2 direction are provided at both ends in the X direction of one side plate portion 113 and at both ends in the X direction of the other side plate portion 114. Each of the four fixing bent portions 116 is provided with a rectangular notch 117 cut out in the Z1 direction.

[0038] The second plate 12 includes a flat second plate portion 121 that overlaps the coil 10 from the Z2 side. The second plate portion 121 includes a central plate portion 122 that overlaps the long sides 10a and 10b of the coil 10, a first side plate portion 123 that extends from the central plate portion 122 in the Y1 direction and overlaps the first coil holding portion 151, and a second side plate portion 124 that extends from the central plate portion 122 in the Y2 direction and overlaps the second coil holding portion 161. The widths in the X direction of the first side plate portion 123 and the second side plate portion 124 are greater than the width of the central plate portion 122 in the X direction.

[0039] A pair of central bent portions 125 bent in the Z1 direction is provided at both ends in the X direction of the central plate portion 122. As shown in FIGS. 5 and 6 , the tip of the central bent portion 125 faces the tip of the central bent portion 115 of the first plate 11 in the Z direction. The central bent portion 115 of the first plate 11 and the central bent portion 125 of the second plate 12 cover the X-direction side surfaces of the long sides 10a, 10b of the coil 10. A pair of fixing bent portions 126 bent in the Z1 direction is provided at both ends in the X direction of the one side plate portion 123 of the second plate 12 and at both ends in the X direction of the other side plate portion 124.

[0040] When assembling the coil set 13, the two fixing bent portions 116 on the Y1 side of the first plate 11 are fitted into the recesses 154 of the first coil holding portion 151, and the claw portions 155 are fitted into the notches 117 of each fixing bent portion 116 (see FIG. 9). As a result, the two fixing bent portions 116 are locked onto both side surfaces of the first coil holding portion 151 in the X direction.

[0041] Similarly, the two fixing bent portions 116 on the Y2 side are fitted into the recessed portions 164 of the second coil holding portion 161, and the claw portions 165 are fitted into the notched portions 117 of each fixing bent portion 116 (see FIG. 9). As a result, the two fixing bent portions 116 are locked onto both side surfaces of the second coil holding portion 161 in the X direction. As a result, the first holder member 15 and the second holder member 16 are positioned with respect to the first plate 11.

[0042] Next, the coil 10 is placed between the first holder member 15 and the second holder member 16, which are assembled to the first plate 11, and an adhesive is filled into the center hole 10c of the coil 10. In addition, the two coil wires 10d drawn out from the coil 10 are drawn out from the notches 156 of the first holder side plate portion 152 to the Y1 side. Thereafter, the second plate 12 is placed on the coil 10 from the Z2 side, and the adhesive is cured. As shown in Figures 3 and 4, an adhesive layer 18, where the adhesive is cured, is formed in the center hole 10c of the coil 10. As a result, the second plate 12 is fixed to the coil 10 and the first plate 11 via the adhesive layer 18. The adhesive filled into the center hole 10c fills the gap between the coil and the first coil holding portion 151 and the gap between the coil and the second coil holding portion 161. The adhesive also penetrates and hardens (not shown). In this way, the coil set 13 is completed.

[0043] The one side plate portion 123 and the other side plate portion 124 of the second plate 12 have a width in the X direction greater than the one side plate portion 113 and the other side plate portion 114 of the first plate 11. Therefore, when the second plate 12 is placed over the coil 10, the first coil holding portion 151, and the second coil holding portion 161 from the Z2 side, the first coil holding portion 151 fits between the two fixing bent portions 126 on the Y1 side of the second plate 12, and the second coil holding portion 161 fits between the two fixing bent portions 126 on the Y2 side, as shown in FIGS. 5, 6, and 9. The fixing bent portions 116 of the first plate 11 fit into the recesses 154 of the first coil holding portion 151 and the recesses 164 of the second coil holding portion 161, and are therefore covered from the outside by the fixing bent portions 126 of the second plate 12.

[0044] When manufacturing the actuator 1, the coil 10, first plate 11, second plate 12, first holder member 15, and second holder member 16 are assembled as described above to complete the coil set 13. Then, the yoke 8 and magnet 7 are assembled to surround the coil set 13 to complete the movable body 5, and the movable body 5 and the coil set 13 are connected by the connector 4. Thereafter, the first case member 30 and the second case member 40 are assembled to the coil set 13, and the movable body 5 is housed in the case 2. The power supply board 14 may be attached to the coil set 13 before assembling the movable body 5, or may be attached after assembling the case 2.

[0045] (yoke) The yoke 8 is made of a magnetic material. As shown in FIGS. 3 and 4, the yoke 8 has a first opposing portion 801 that faces the coil 10 in the Z1 direction, and a second opposing portion 802 that faces the coil 10 in the Z2 direction. A first magnet 71 is fixed to the first opposing portion 801. A second magnet 72 is fixed to the second opposing portion 802. As shown in FIG. 4, the yoke 8 also has a pair of connecting portions 803 that extend in the Z direction on both sides of the coil 10 in the X direction. The pair of connecting portions 803 connect the first opposing portion 801 and the second opposing portion 802.

[0046] When assembling the yoke 8, a pair of second connecting plate portions 805 extending in the Z1 direction from both ends in the X direction of the second opposing portion 802 are press-fitted and fixed inside a pair of first connecting plate portions 804 extending in the Z2 direction from both ends in the X direction of the first opposing portion 801. This forms a pair of connecting portions 803, and the yoke 8 is assembled into a shape that surrounds the outer peripheries of the coil 10, the first plate 11, and the second plate 12 (see FIGS. 2 and 4).

[0047] 5 and 6, the yoke 8 includes a first yoke 81 and a second yoke 82. The first yoke 81 is formed by joining two members: a first inner member 83 that overlaps the coil 10 from the Z1 direction, and a first outer member 84 that overlaps the first inner member 83 from the Z1 direction. The second yoke 82 is formed by joining two members: a second inner member 85 that overlaps the coil 10 from the Z1 direction, and a second outer member 86 that overlaps the second inner member 85 from the Z1 direction.

[0048] The first opposing portion 801 of the yoke 8 is formed by stacking the first outer member 84 and the first inner member 83 in the Z direction. As shown in FIGS. 5 and 6 , a pair of first connecting plate portions 804 are provided on the first outer member 84 and extend in the Z2 direction on both sides of the first inner member 83 and the first magnet 71 in the X direction. The first opposing portion 801 includes a pair of first connector fixing portions 806 extending on both sides of the first inner member 83 and the first magnet 71 in the Y direction. The pair of first connector fixing portions 806 are each connected to the first plate 11 via a first connector 9A.

[0049] The second opposing portion 802 of the yoke 8 is formed by stacking the second outer member 86 and the second inner member 85 in the Z direction. As shown in FIGS. 5 and 6, a pair of second connecting plate portions 805 are provided on the second outer member 86 and extend in the Z1 direction on both sides of the second inner member 85 and the second magnet 72 in the X direction. The first opposing portion 801 includes a pair of second connector fixing portions 807 extending on both sides of the second inner member 85 and the second magnet 72 in the Y direction. The pair of second connector fixing portions 807 are each connected to the second plate 12 via a second connector 9B.

[0050] (connector) As shown in Figures 3, 5, and 6, the first connecting body 9A and the second connecting body 9B have a rectangular parallelepiped shape that is long in the X direction. As shown in Figure 3, the first connecting body 9A is located on the Z1 side of the coil 10. The second connecting body 9B is located on the Z2 side of the coil 10. The first connecting body 9A is arranged in two locations, on the Y1 and Y2 sides of the first magnet 71, and is made up of two members of the same shape. The second connecting body 9B is arranged in two locations, on the Y1 and Y2 sides of the second magnet 72, and is made up of two members of the same shape. The first connecting body 9A and the second connecting body 9B each have at least one of elasticity and viscoelasticity.

[0051] As described above, the first connecting body 9A is sandwiched between the first opposing portion 801 of the yoke 8 and the first plate 11 on both sides of the coil 10 in the Y direction. The first connecting body 9A is compressed in the Z direction between the first opposing portion 801 and the first plate 11. As described above, the second connecting body 9B is sandwiched between the second opposing portion 802 of the yoke 8 and the second plate 12 on both sides of the coil 10 in the Y direction. The second connecting body 9B is compressed in the Z direction between the second opposing portion 802 and the second plate 12.

[0052] In this embodiment, the first connecting body 9A and the second connecting body 9B are gel-like members made of silicone gel. Silicone gel is a viscoelastic material whose spring constant when deforming in the expansion / contraction direction is about three times the spring constant when deforming in the shear direction. When a viscoelastic material deforms in a direction intersecting the thickness direction (shear direction), the deformation is in the direction of extension due to tension, and therefore the material has deformation characteristics in which the linear component is greater than the nonlinear component. Furthermore, when compressed and deformed in the thickness direction, the material has expansion / contraction characteristics in which the nonlinear component is greater than the linear component, while when stretched and stretched in the thickness direction, the material has expansion / contraction characteristics in which the linear component is greater than the nonlinear component.

[0053] Alternatively, various rubber materials such as natural rubber, diene rubber (e.g., styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, etc.), non-diene rubber (e.g., butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, fluororubber, etc.), thermoplastic elastomer, and modified materials thereof may be used for the first connector 9A and the second connector 9B.

[0054] 10 is a cross-sectional view of the actuator 1 showing the planar shape and arrangement of the connecting body 4, taken along the line DD in FIG. 3. As shown in FIG. 10, the second connecting body 9B is connected to one side plate portion 123 and the other side plate portion 124 of the second plate 12. As shown in FIG. 10, the length in the X direction of the second connecting body 9B is greater than the width in the X direction of the central plate portion 122 and is greater than the width in the X direction of the coil 10 covered by the central plate portion 122.

[0055] The first connecting body 9A has the same shape as the second connecting body 9B and is disposed at the same position as the second connecting body 9B when viewed from the Z direction. The first connecting body 9A is connected to one side plate portion 113 and the other side plate portion 114 of the first plate 11. The length in the X direction of the first connecting body 9A is greater than the width in the X direction of the central plate portion 112 and is also greater than the width in the X direction of the coil 10 covered by the central plate portion 112.

[0056] (Detailed shape of the yoke) 11 is a side view of the movable body 5, the connecting body 4, and the coil set 13 as viewed from the X2 direction. As described above, the yoke 8 has the first opposing portion 801 and the second opposing portion 802 at both ends in the Y direction. protrude on the Y1 side and Y2 side of the connecting portion 803, with the first connecting body fixing portion 806 and the first connecting body 9A arranged on the Y1 side of the connecting portion 803, and the second connecting body fixing portion 807 and the second connecting body 9B arranged on the Y2 side of the connecting portion 803. That is, as shown in FIGS. 10 and 11, the yoke 8 is cut out on both sides of the pair of connecting portions 803 in the Y direction in a shape that exposes the first connecting body 9A and the second connecting body 9B when viewed from the X direction. As shown in FIG. 10, the first connecting body 9A and the second connecting body 9B face the first holder protrusion 153 of the first holder member 15 and the second holder protrusion 163 of the second holder member 16 in the X direction.

[0057] When the movable body 5 is assembled around the coil set 13, the connection portion 803 of the yoke 8 is disposed in the space between the Y2-direction tip of the first holder protrusion 153 and the Y1-direction tip of the second holder protrusion 163 (see FIGS. 2 and 9). Each of the pair of connection portions 803 has a first notch 808 formed by cutting out the center portion in the Z direction of the Y1-side edge toward the Y2 side, and a second notch 809 formed by cutting out the center portion in the Z direction of the Y1-side edge toward the Y1 side (see FIGS. 2 and 11). As shown in FIG. 11, when viewed from the X direction, the Y2-side end of the first coil holding portion 151 is disposed in the first notch 808, and the Y1-side end of the second coil holding portion 161 is disposed in the second notch 809. That is, in the yoke 8, both ends in the Y direction of the pair of connecting portions 803 are cut out in a shape that does not interfere with the first coil holding portion 151 and the second coil holding portion 161.

[0058] 2, when the movable body 5 is assembled around the coil set 13, a first connector fixing portion 806 provided at the Y1-side end of the first opposing portion 801 and a second connector fixing portion 807 provided at the Y1-side end of the second opposing portion 802 are disposed between a pair of first holder protrusions 153 facing each other in the X direction. Furthermore, a first connector fixing portion 806 provided at the Y2-side end of the first opposing portion 801 and a second connector fixing portion 807 provided at the Y2-side end of the second opposing portion 802 are disposed between a pair of second holder protrusions 163 facing each other in the X direction. Therefore, when the movable body 5 moves significantly in the X direction due to an impact or the like, the first holder protrusions 153 and the second holder protrusions 163 of the coil holder 17 collide with the first connector fixing portions 806 and 807 and function as stoppers that restrict excessive movement of the movable body 5.

[0059] (case) 1 and 2, the first case member 30 includes a substantially rectangular first end plate portion 31 facing the coil 10 in the Z1 direction. The first case member 30 also includes a first case first side plate portion 32 extending in the Z2 direction from the Y1-direction end of the first end plate portion 31, a first case second side plate portion 33 extending in the Z2 direction from the Y2-direction end of the first end plate portion 31, a first case third side plate portion 34 extending in the Z2 direction from the X1-direction end of the first end plate portion 31, and a first case fourth side plate portion 35 extending in the Z2 direction from the X2-direction end of the first end plate portion 31.

[0060] The X-direction edge of the first end plate 31 is provided with a protruding portion that protrudes to both sides in the X direction at the center in the Y direction. Therefore, the first case third side plate 34 and the first case fourth side plate 35 each have a side plate central portion 301 that extends in the Z1 direction from the tip of the protruding portion of the first end plate 31, and side plate end portions 302 that are provided on both sides of the side plate central portion 301 in the Y direction and shifted more inward than the side plate central portion 301 (toward the center in the X direction of the first case member 30). Both ends of the side plate central portion 301 in the Y direction are connected to stepped portions that are bent inward at approximately right angles, and the side plate central portion 301 and the side plate end portions 302 are connected via the stepped portions.

[0061] 2, the first case first side plate 32 is shaped so as not to interfere with the board fixing portion 159 provided on the first holder side plate 152, and is cut out in a shape that surrounds the Z1 side, X1 side, and X2 side of the board fixing portion 159. The first case second side plate 33 has a circular first protrusion 36 that protrudes toward the inside (Y1 direction) of the first case member 30. The first protrusion 36 is a half-punched portion that is formed by deforming a metal plate by press working into a shape that protrudes in the Y1 direction. Therefore, the first protrusion 36 has a concave shape on the Y2 side that is recessed toward the Y1 side, and a convex shape on the Y1 side that is protruded toward the Y1 side. The first protrusions 36 are formed at two locations spaced apart in the X direction at the tip end portion of the first case second side plate portion 33 in the Z2 direction.

[0062] In this embodiment, when assembling the first case member 30 to the coil assembly 13, the coil holder 17 is fitted between the first case second side plate portion 33 and the first case first side plate portion 32. At this time, as shown in the partially enlarged view of FIG. 9 , two first protrusions 36 provided on the first case second side plate portion 33 abut against a second holder side plate portion 162 arranged at the Y2-side end of the coil holder 17. The first protrusions 36 elastically contact the first case second side plate portion 33 from the Y2 side and press the coil holder 17 toward the Y1 side. As a result, the coil holder 17 is biased in the Y1 direction inside the first case member 30, and the first holder side plate portion 152 provided at the Y1-side end of the coil holder 17 is pressed against the first case first side plate portion 32 from the Y2 side (see FIGS. 3 and 9 ). As a result, the coil holder 17 is positioned relative to the first case member 30 in a state where it does not rattle in the Y direction.

[0063] As described above, the board fixing portion 159 provided on the coil holder 17 protrudes toward the Y1 side from the notch provided in the first case first side plate 32. As shown in FIG. 3 , in this embodiment, it is the Y1-direction side surface (abutment surface 158) of the first holder side plate 152 that abuts against the first case first side plate 32, and the step between the board fixing portion 159 and the abutment surface 158 is greater than the plate thickness of the first case first side plate 32. Therefore, the Z1-side end of the power supply board 14 extending toward the Z1 side of the board fixing portion 159 does not contact the first case first side plate 32, and a gap S (see FIG. 3 ) in the Y direction is formed between the power supply board 14 and the first case first side plate 32. This prevents the pattern on the power supply board 14 from coming into contact with the case 2 and causing a short circuit.

[0064] Next, the second case member 40 has a substantially rectangular second end plate portion 41 facing the coil 10 from the Z2 direction. The second case member 40 also has a second case first side plate portion 42 extending in the Z1 direction from the Y1-direction end of the second end plate portion 41, a second case second side plate portion 43 extending in the Z1 direction from the Y2-direction end of the second end plate portion 41, a second case third side plate portion 44 extending in the Z1 direction from the X1-direction end of the second end plate portion 41, and a second case fourth side plate portion 45 extending in the Z1 direction from the X2-direction end of the second end plate portion 41.

[0065] The X-direction edge of the second end plate 41 has a protruding portion that protrudes to both sides in the X direction at the center in the Y direction. Therefore, the second case third side plate 44 and the second case fourth side plate 45 each have a side plate central portion 401 that extends in the Z2 direction from the tip of the protruding portion of the second end plate 41, and side plate end portions 402 that are provided on both sides of the side plate central portion 401 in the Y direction and shifted more inward than the side plate central portion 401 (toward the center in the X direction of the second case member 40). Both ends of the side plate central portion 401 in the Y direction are connected to stepped portions that are bent inward at approximately right angles, and the side plate central portion 401 and the side plate end portions 402 are connected via the stepped portions.

[0066] The first case member 30 and the second case member 40 are positioned by press-fitting a pair of first side plates (i.e., first case third side plate 34 and first case fourth side plate 35) provided at both ends of the first case member 30 in the X direction between a pair of second side plates (i.e., second case third side plate 44 and second case fourth side plate 45) provided at both ends of the second case member 40 in the X direction. After being temporarily fixed by press-fitting, the first case member 30 and the second case member 40 are finally fixed by welding the overlapping portions of the second case third side plate 44 and the first case third side plate 34 and the overlapping portion of the second case fourth side plate 45 and the first case fourth side plate 35.

[0067] 2, the second case third side plate portion 44 includes a second protrusion 46 that protrudes in the X2 direction (i.e., toward the inside of the second case member 40). The second case member 40 has a third protrusion 47 that protrudes in the X1 direction (i.e., toward the inside of the second case member 40). The second protrusion 46 and the third protrusion 47 are formed in two locations on both ends of the side panel central portion 401 in the Y direction, and are also formed in one location on each of the side panel end portions 402 provided on both sides of the side panel central portion 401. The second protrusion 46 and the third protrusion 47 are half-punched portions having the same shape as the first protrusion 36.

[0068] The second protrusion 46 and the third protrusion 47 are formed at positions facing each other in the X direction. A pair of first side plate portions (first case third side plate portion 34 and first case fourth side plate portion 35) of the first case member 30 are press-fitted between the facing second protrusion 46 and third protrusion portion 47. As shown in the partially enlarged view of FIG. 9 , the second protrusion 46 elastically contacts the first case third side plate portion 34 from the X1 side. Furthermore, the third protrusion 47 elastically contacts the first case fourth side plate portion 35 from the X2 side.

[0069] As will be described later, in this embodiment, the coil holder 17 is press-fitted between the first case third side plate portion 34 and the first case fourth side plate portion 35, so that a pressing force in a direction expanding in both directions in the X direction is constantly acting on the first case third side plate portion 34 and the first case fourth side plate portion 35. Therefore, when the first case member 30 and the second case member 40 are assembled, a state is created in which a pressing force constantly acts from the first case third side plate portion 34 and the first case fourth side plate portion 35 to press the second case third side plate portion 44 and the second case fourth side plate portion 45 outward.

[0070] (Press-fit fixed part) The coil holder 17 is fixed to the case 2 by press-fitting the first holder member 15 and the second holder member 16 into the inside of the first case member 30. As shown in FIGS. 2 and 9 , the first holder member 15 has a press-fit fixing portion 50 that is press-fitted between the first case third side plate portion 34 and the first case fourth side plate portion 35. In addition, the second holder member 16 has a press-fit fixing portion 60 that is press-fitted between the first case third side plate portion 34 and the first case fourth side plate portion 35.

[0071] 12 is a cross-sectional view of the actuator 1 taken at the position of the press-fit fixing portion 50 (a cross-sectional view taken at the EE position in FIG. 9). In the first holder member 15, the first holder side plate portion 152 and the first holder protrusion portion 153 form the press-fit fixing portion 50. As shown in FIGS. 9 and 12, the press-fit fixing portion 50 is press-fitted between a pair of side plate end portions 302 provided at the ends of the first case third side plate portion 34 and the first case fourth side plate portion 35 in the Y1 direction.

[0072] 9 and 12, the end portion of the press-fit fixing portion 50 in the X1 direction (i.e., the first holder protrusion 153 on the X1 side) has a one-side fixing surface 51 that abuts from the inside against the side plate end portion 302 of the first case third side plate portion 34. The end portion of the press-fit fixing portion 50 in the X2 direction (i.e., the first holder protrusion 153 on the X2 side) has a other-side fixing surface 52 that abuts from the inside against the side plate end portion 302 of the first case fourth side plate portion 35.

[0073] 2, 7, and 12, one-side fixed surface 51 and other-side fixed surface 52 are provided in the center portion of press-fitted fixed portion 50 in the Z direction. Step portions in the X direction are provided on the Z1 and Z2 sides of one-side fixed surface 51 and other-side fixed surface 52, respectively. That is, the X1-direction end of press-fitted fixed portion 50 includes one-side recess 53 recessed in the X2 direction relative to one-side fixed surface 51 on the Z1 side of one-side fixed surface 51, and one-side protrusion 54 protruding in the X1 direction relative to one-side fixed surface 51 on the Z2 side of one-side fixed surface 51. Similarly, the X2-direction end of press-fitted fixed portion 50 includes other-side recess 55 recessed in the X1 direction relative to other-side fixed surface 52 on the Z1 side of other-side fixed surface 52, and other-side protrusion 56 protruding in the X2 direction relative to other-side fixed surface 52 on the Z2 side of other-side fixed surface 52.

[0074] As shown in FIG. 12, the press-fit fixing portion 50 has a first fixing surface 51 and a second fixing surface 52 provided in the center portion in the Z direction, and the first case third side plate portion 34 and the first case fourth side plate portion 35 are fixed to each other. The press-fit fixing portion 50 abuts against the Z2-direction tip portions, and the Z1-direction portions (one-side recess 53 and the other-side recess 55) do not contact the first case third side plate portion 34 and the first case fourth side plate portion 35. Therefore, the press-fit fixing portion 50 presses the Z2-direction tip portions of the first case third side plate portion 34 and the first case fourth side plate portion 35 in a direction that spreads them outward (to both sides in the X direction).

[0075] The press-fit fixing portion 50 is positioned in the Z direction relative to the first case member 30 by being press-fitted to a position where the tips of the first case third side plate portion 34 and the first case fourth side plate portion 35 abut against the step portion between the one-side protrusion portion 54 and the one-side fixing surface 51 and the step portion between the other-side protrusion portion 56 and the other-side fixing surface 52. The Z2-direction ends (the one-side protrusion portion 54 and the other-side protrusion portion 56) of the press-fit fixing portion 50 are covered from the outside (on both sides in the X direction) by the second case third side plate portion 44 and the second case fourth side plate portion 45 of the second case member 40.

[0076] Next, in the second holder member 16, the second holder side plate portion 162 and the second holder protrusion portion 163 form the press-fit fixing portion 60 (see FIGS. 2, 7, and 9). The press-fit fixing portion 60 is press-fitted between a pair of side plate end portions 302 provided at the ends of the first case third side plate portion 34 and the first case fourth side plate portion 35 in the Y2 direction.

[0077] Press-fit fixing portion 60 has a configuration similar to that of press-fit fixing portion 50. That is, the X1 direction end portion of press-fit fixing portion 60 includes one-side fixing surface 61 that abuts against side plate end portion 302 of first case third side plate portion 34 from the inside, one-side recessed portion 63 (see FIG. 6 ) that is recessed in the X2 direction relative to one-side fixing surface 61 on the Z1 side of one-side fixing surface 61, and one-side protruding portion 64 that protrudes in the X1 direction relative to one-side fixing surface 61 on the Z2 side of one-side fixing surface 61. Furthermore, the X2 direction end portion of press-fit fixing portion 60 includes other-side fixing surface 62 that abuts against side plate end portion 302 of first case fourth side plate portion 35 from the inside, other-side recessed portion 65 that is recessed in the X1 direction relative to other-side fixing surface 62 on the Z1 side of other-side fixing surface 62, and other-side protruding portion 66 that protrudes in the X2 direction relative to other-side fixing surface 62 on the Z2 side of other-side fixing surface 62.

[0078] The press-fit fixing portion 60 has one-side fixing surface 61 and other-side fixing surface 62 provided in the center portion in the Z direction abutting against the tip portions of the first case third side plate portion 34 and the first case fourth side plate portion 35, and the Z1-direction end portions (one-side recess 63 and other-side recess 65) are not in contact with the first case third side plate portion 34 and the first case fourth side plate portion 35. Therefore, the press-fit fixing portion 60 presses the Z2-direction tip portions of the first case third side plate portion 34 and the first case fourth side plate portion 35 in a direction that spreads them outward (to both sides in the X direction).

[0079] Furthermore, the press-fit fixing portion 60 is press-fitted to a position where the tips of the first case third side plate portion 34 and the first case fourth side plate portion 35 abut against the step portion between the one-side protrusion portion 64 and the one-side fixing surface 61 and the step portion between the other-side protrusion portion 66 and the other-side fixing surface 62, respectively, thereby being positioned in the Z direction with respect to the first case member 30. The Z2-direction ends (the one-side protrusion portion 64 and the other-side protrusion portion 66) of the press-fit fixing portion 60 are covered from the outside (on both sides in the X direction) by the second case third side plate portion 44 and the second case fourth side plate portion 45 of the second case member 40.

[0080] With this fixing structure, the pair of first side plate portions (first case third side plate portion 34 and first case fourth side plate portion 35) of the first case member 30 are constantly pressed outward by the pressing force from the press-fit fixing portions 50, 60, so that the first case third side plate portion 34 and the first case fourth side plate portion 35 are constantly pressed from the inside against the pair of second side plate portions (second case third side plate portion 44 and second case fourth side plate portion 45) of the second case member 40 that covers the first case member 30. Therefore, the first case member 30 is positioned relative to the second case member 40 without any rattle.

[0081] (Main effects of this embodiment) As described above, the actuator 1 of this embodiment includes the movable body 5, the support body 3 including the case 2 and coil holder 17 that house the movable body 5, the connector 4 connected to the movable body 5 and the support body 3, the coil 10 held by the coil holder 17, and the magnet 7 facing the coil 10 in the Z direction (first direction), and the magnetic drive circuit 6 that vibrates the movable body 5 in the X direction (second direction) relative to the support body 3. The support body 3 includes a first metal plate 11 that overlaps the coil 10 from the Z1 direction, and a second metal plate 12 that overlaps the coil 10 from the Z2 direction. The movable body 5 includes a yoke 8 that holds the magnet 7. The yoke 8 has a first yoke 81 including a first opposing portion 801 facing the first plate 11 in the Z1 direction and a pair of first connecting plate portions 804 extending in the Z2 direction from both ends of the first opposing portion 801 in the X direction, and a second yoke 82 including a second opposing portion 802 facing the second plate 12 in the Z2 direction and a pair of second connecting plate portions 805 extending in the Z1 direction from both ends of the second opposing portion 802 in the X direction and fitted inside the pair of first connecting plate portions 804. The connecting body 4 has a pair of first connecting bodies 9A that connect the first plate 11 to a pair of first connecting body fixing portions 806 provided at both ends of the first opposing portion 801 in the Y direction (third direction). The yoke 8 has notches cut out on both X-direction sides of the first connecting body 9A.

[0082] According to this embodiment, the thickness of the connection portions 803 of the yoke 8 constituting the movable body 5, which are located on both sides of the coil 10 in the X direction, is twice the plate thickness. The first connection body 9A is located inside the yoke 8 (at a position where the first plate 11 and the yoke 8 face each other in the Z direction), and the yoke 8 has a shape in which both sides of the first connection body 9A in the X direction are cut out. By cutting out both ends of the yoke 8 in the Y direction so that the entire first connection body 9A is exposed when viewed from the X direction, the width of the space in the X direction in which the first connection body 9A can be placed can be increased without increasing the outer shape of the movable body 5, thereby increasing the length of the first connection body 9A in the X direction. By increasing the thickness of the connection portions 803, the weight of the movable body 5 can be secured even when both sides of the first connection body 9A in the X direction are cut out. Therefore, it is possible to avoid increasing the size of the actuator 1, ensure the weight of the movable body 5, and ensure the length of the first connecting body 9A in the X direction, thereby preventing the movable body 5 from swinging like a pendulum (pendulum motion) instead of moving straight when vibrating.

[0083] In this embodiment, the connecting body 4 includes a pair of second connecting bodies 9B that connect the second plate 12 to a pair of second second connecting body fixing portions 807 provided at both ends of the second opposing portion 802 in the Y direction. The yoke 8 is cut out on both sides of the second connecting body 9B in the X direction. As described above, the second connecting body 9B is also disposed inside the yoke 8 (at a position where the first plate 11 and the yoke 8 face each other in the Z direction), similar to the first connecting body 9A. The both ends of the yoke 8 in the Y direction are cut out in a shape that exposes the entire second connecting body 9B when viewed from the X direction. This allows the width of the space in the X direction in which the second connecting body 9B can be placed to be increased without increasing the external shape of the movable body 5. Therefore, the length of the second connecting body 9B in the X direction can be secured, thereby enhancing the effect of suppressing pendulum motion when the movable body 5 vibrates.

[0084] In this embodiment, since the pendulum motion of the movable body 5 can be suppressed, the movable body 5 and the support body 3 do not collide even if the gap between them in the Z direction is reduced, and the Z direction dimension of the actuator 1 can be reduced. Furthermore, by reducing the gap between the movable body 5 and the support body 3 in the Z direction, the driving force of the magnetic drive circuit 6 can be increased, making it possible to generate large vibrations. Alternatively, the movable body 5 can be vibrated with little power consumption.

[0085] In this embodiment, the coil holder 17 has a first holder member 15 including a first coil holding portion 151 disposed in the Y1 direction relative to the coil 10 and a first holder side plate portion 152 extending in the Z direction from the Y1 end of the first coil holding portion 151, and a second holder member 16 including a second coil holding portion 161 disposed in the Y2 direction relative to the coil 10 and a second holder side plate portion 162 extending in the Z direction from the Y2 end of the second coil holding portion 161. The widths of the coil holding portion 151 and the second coil holding portion 161 in the X direction are larger than the width of the coil 10 in the X direction, and the pair of first connecting bodies 9A and the pair of second connecting bodies 9B overlap the first coil holding portion 151 and the second coil holding portion 161 in the Z1 direction. By dividing the coil holder 17 into two members in the Y direction, the resin portions covering both sides of the coil 10 in the X direction are no longer necessary. This allows the outer dimensions of the actuator 1 to be reduced in the X direction. Alternatively, the coil 10 can be enlarged without increasing the outer dimensions of the actuator 1, thereby increasing the thrust of the magnetic drive circuit 6 and generating large vibrations. Furthermore, because the first coil holding portion 151 and the second coil holding portion 161 have large dimensions in the X direction, space can be secured to attach the first connecting body 9A and the second connecting body 9B, which are long in the X direction.

[0086] In this embodiment, the yoke 8 includes a pair of connecting portions 803 that extend in the Z direction on both sides of the coil 10 in the X direction and connect a first opposing portion 801 and a second opposing portion 802. Each connecting portion 803 is configured by stacking a first connecting plate portion 804 and a second connecting plate portion 805. When viewed from the X direction, the first coil holding portion 151 is disposed in a first notch portion 808 formed by cutting out the Y1-direction edge of each of the pair of connecting portions 803. When viewed from the X direction, the second coil holding portion 161 is disposed in a second notch portion 809 formed by cutting out the Y2-direction edge of each of the pair of connecting portions 803. In this manner, interference between the yoke 8 and the first coil holding portion 151 and the second coil holding portion 161 can be avoided even when the widths of the first coil holding portion 151 and the second coil holding portion 161 in the X direction are increased. Therefore, without increasing the external size of the movable body 5, the width in the X direction of the space in which the first connecting body 9A and the second connecting body 9B can be arranged can be increased.

[0087] In this embodiment, the first holder member 15 includes a pair of first holder protrusions 153 that protrude in the Y2 direction from opposite edge portions in the X direction of the first holder side plate portion 152. The second holder member 16 includes a pair of second holder protrusions 163 that protrude in the Y1 direction from opposite edge portions in the X direction of the second holder side plate portion 162. One of the pair of first first connector fixing portions 806 (the first first connector fixing portion 806 on the Y1 side) is disposed between the pair of first holder protrusions 153, and the other of the pair of first first connector fixing portions 806 (the first first connector fixing portion 806 on the Y2 side) is disposed between the pair of second holder protrusions 163. Similarly, the pair of second second connector fixing portions 807 are disposed between the pair of first holder protrusions 153 and between the pair of second holder protrusions 163. As a result, first holder protrusion 153 and second holder protrusion 163 function as stoppers that restrict the range of movement in the X direction of movable body 5. By providing a stopper on coil holder 17 rather than on case 2 in this way, there is less risk of movable body 5 colliding with case 2 and being deformed or destroyed by an impact such as being dropped, and therefore the impact resistance of actuator 1 can be improved.

[0088] In this embodiment, the case 2 has a first case member 30 including a first end plate 31 facing the movable body 5 in the Z1 direction and a pair of first case side plates (a first case third side plate 34 and a first case fourth side plate 35) extending in the Z2 direction from both X-direction edges of the first end plate 31. The first holder protrusion 153 and the second holder protrusion 163 are press-fitted between the pair of first case side plates (the first case third side plate 34 and the first case fourth side plate 35). Therefore, the portion functioning as a stopper can be used as a press-fit fixing portion for the case 2, thereby suppressing rattle of the coil holder 17 relative to the case 2. Furthermore, the coil holder 17 can be fixed to the case 2 without using adhesive, resulting in good assembly ease.

[0089] In this embodiment, the first plate 11 includes a central plate portion 112 disposed between the pair of connecting portions 803 and overlapping the coil 10, one side plate portion 113 extending from the central plate portion 112 in the Y1 direction and overlapping the first coil holding portion 151, and the other side plate portion 114 extending from the central plate portion 112 in the Y2 direction and overlapping the second coil holding portion 161. The second plate 12 also includes a central plate portion 122 disposed between the pair of connecting portions 803 and overlapping the coil 10, and one side plate portion 113 extending from the central plate portion 122 in the Y1 direction and overlapping the second coil holding portion 161. The first plate 11 includes a first side plate portion 123 extending in the Y2 direction and overlapping the first coil holding portion 151, and a second side plate portion 124 extending from the central plate portion 122 in the Y2 direction and overlapping the second coil holding portion 161. Central bending portions 115, 125 are provided at both ends in the X direction of the central plate portions 112, 122 of each plate, and the central bending portions 115, 125 are bent in the Z direction to cover the side surface of the coil 10 in the X direction. The widths in the X direction of the first side plate portions 113, 123 and the second side plate portions 114, 124 are greater than the width in the X direction of the central plate portions 112, 122, and one of the pair of first connecting bodies 9A is connected to the first side plate portion 113 of the first plate 11, and the other of the pair of first connecting bodies 9A is connected to the second side plate portion 114 of the first plate 11. This ensures that there is enough space to attach first connector 9A and second connector 9B, which have a longer dimension in the X direction, to both ends in the Y direction of first plate 11 and second plate 12. Furthermore, because coil 10 can be protected by first plate 11 and second plate 12, there is little risk of coil 10 being damaged by a collision with magnet 7 or yoke 8.

[0090] In this embodiment, the length in the X direction of first connecting body 9A and second connecting body 9B is greater than the width in the X direction of coil 10, and is also greater than the width in the X direction of central plate portions 112, 122. In this way, by increasing the length in the X direction of first connecting body 9A and second connecting body 9B, it is possible to enhance the effect of suppressing pendulum motion when movable body 5 vibrates.

[0091] In this embodiment, both ends in the X direction of one side plate portion 113 of first plate 11 and both ends in the X direction of the other side plate portion 114 of first plate 11 are provided with fixing bent portions 116 that are bent in the Z2 direction and engaged with both end faces in the X direction of first coil holding portion 151 and both end faces in the X direction of second coil holding portion 161. Therefore, since the coil set 13 can be assembled by engaging and positioning first plate 11 with first holder member 15 and second holder member 16, a decrease in ease of assembly of actuator 1 can be suppressed even when coil holder 17 is divided into two members.

[0092] In this embodiment, the first yoke 81 includes a flat-plate first inner member 83 that overlaps the coil 10 from the Z1 direction, and a first outer member 84 that overlaps the first inner member 83 from the Z1 direction. The second yoke 82 includes a flat-plate second inner member 85 that overlaps the coil 10 from the Z2 direction, and a second outer member 86 that overlaps the second inner member 85 from the Z2 direction. In this way, the thickness of the portion facing the coil 10 in the Z direction (first direction) is increased by stacking the two members, thereby ensuring the weight of the movable body 5. Furthermore, since the weight of the yoke 8 can be ensured using a general-purpose member with a plate thickness, an increase in the cost of the parts that make up the yoke 8 can be avoided.

[0093] (Variation) (1) In the above embodiment, the first connector 9A and the second connector 9B are provided as the connector 4, but a configuration in which only one of the first connector 9A and the second connector 9B is provided may also be used.

[0094] (2) In the above embodiment, the magnet 7 includes the first magnet 71 and the second magnet 72. However, the magnet 7 may include only one of the first magnet 71 and the second magnet 72.

[0095] (3) In the above embodiment, the first yoke 81 and the second yoke 82 of the yoke 8 are each constructed by stacking an inner member and an outer member, but the first yoke 81 and the second yoke 82 may each be constructed only from an outer member.

[0096] (4) In the above embodiment, the yoke 8 has a pair of second connecting plate portions 805 pressed into the inside of a pair of first connecting plate portions 804, but it may also be configured so that a pair of first connecting plate portions 804 are pressed into the inside of a pair of second connecting plate portions 805.

[0097] (5) In the above embodiment, the coil holder 17 is divided into two parts in the Y direction and is configured as two members. However, coil holder 17 can also be configured as a single member. For example, coil holder 17 can be configured such that a coil arrangement hole is provided in a plate portion that connects first holder side plate portion 152 and second holder side plate portion 162.

[0098] (6) In the above embodiment, the X-direction side plates (second case third side plate portion 44, second case fourth side plate portion 45) of the second case member 40 are provided with protrusions (second protrusion portion, third protrusion portion 47) that protrude inward. However, the protrusions may be provided on either the first case member 30 or the second case member 40. That is, the first case third side plate portion 34 may be provided with a second protrusion that protrudes outward, and the first case fourth side plate portion 35 may be provided with a third protrusion that protrudes outward. [Explanation of symbols]

[0099] 1...actuator, 2...case, 3...support, 4...connecting body, 5...movable body, 6...magnetic drive circuit, 7...magnet, 8...yoke, 9A...first connecting body, 9B...second connecting body, 10...coil, 10a, 10b...long side portion, 10c...center hole, 10d...coil wire, 11...first plate, 12...first plate, 13...coil set, 14...power supply board, 15...first holder member, 16...second holder member, 17...coil holder, 18...adhesive layer, 30...first case member, 31...first end plate portion, 32...first case first side plate portion, 33...first case second side plate portion, 34...first case third side plate portion, 35 ...first case fourth side plate portion, 36...first protrusion, 40...first case member, 41...second end plate portion, 42...second case first side plate portion, 43...second case second side plate portion, 44...second case third side plate portion, 45...second case fourth side plate portion, 46...second protrusion, 47...third protrusion, 50...press-fit fixing portion, 51...one side fixing surface, 52...other side fixing surface, 53...one side recess, 54...one side protrusion, 55...other side recess, 56...other side protrusion, 60...press-fit fixing portion, 61...one side fixing surface, 62...other side fixing surface, 63...one side recess, 64...one side protrusion, 65...other side recess, 66...other side protrusion, 71...first magnet, 72...second magnet, 81...first yoke, 82...second yoke, 83...first inner member, 84...first outer member, 85...second inner member, 86...second outer member, 111...first plate portion, 112...central plate portion, 113...one side plate portion, 114...other side plate portion, 115...central bent portion, 116...fixing bent portion, 117...notch portion, 121...second plate portion, 122...central plate portion, 123...one side plate portion, 124...other side plate portion, 125...central bent portion, 126...fixing bent portion, 151...first coil holding portion, 152...first holder side plate portion, 153...first holder protrusion portion, 154...recess, 15 5...claw portion, 156...notch portion, 157...groove portion, 158...abutment surface, 159...substrate fixing portion, 161...second coil holding portion, 162...second holder side plate portion, 163...second holder protrusion portion, 164...recess, 165...claw portion, 301...side plate center portion, 302...side plate end portion, 401...side plate center portion, 402...side plate end portion, 801...first opposing portion, 802...second opposing portion, 803...connecting portion, 804...first connecting plate portion, 805...second connecting plate portion, 806...first connector fixing portion, 807...second connector fixing portion, 808...first notch portion, 809...second notch portion, S...gap, X...second direction, Y...third direction,Z…First Direction

Claims

1. A movable body and a support body including a case that houses the movable body and a coil holder; a connecting body connected to the movable body and the support body; a magnetic drive circuit including a coil held by the coil holder and a magnet facing the coil in a first direction, and vibrating the movable body relative to the support in a second direction intersecting the first direction, the support body includes a first metal plate overlapping the coil from one side in the first direction, and a second metal plate overlapping the coil from the other side in the first direction, the movable body includes a yoke that holds the magnet, The yoke is a first yoke including a first opposing portion opposing the first plate from one side in the first direction, and a pair of first connecting plate portions extending from both ends of the first opposing portion in the second direction to the other side in the first direction; a second yoke including a second opposing portion opposing the second plate from the other side in the first direction, and a pair of second connecting plate portions extending from both ends of the second opposing portion in the second direction to one side in the first direction, the other of the pair of first connecting plate portions and the pair of second connecting plate portions is disposed inside one of the pair of first connecting plate portions and the pair of second connecting plate portions, When a direction intersecting the first direction and the second direction is defined as a third direction, the connecting body includes a pair of first connecting bodies that connect the first plate to a pair of first connecting body fixing portions that are provided at both ends of the first opposing portion in the third direction, The actuator is characterized in that the yoke has notches on both sides of the first connector in the second direction.

2. the connecting body includes a pair of second connecting bodies that connect the second plate to a pair of second connecting body fixing portions provided at both ends of the second opposing portion in the third direction, 2. The actuator according to claim 1, wherein the yoke is cut out on both sides of the second connector in the second direction.

3. The coil holder includes: a first holder member including a first coil holding portion disposed on one side of the coil in the third direction, and a first holder side plate portion extending in the first direction from an end of the first coil holding portion on the one side in the third direction; a second coil holding portion disposed on the other side of the coil in the third direction; and a second holder member including a second holder side plate portion extending in the first direction from an end of the second coil holding portion on the other side of the third direction. a width in the second direction of the first coil holding portion and the second coil holding portion is greater than a width in the second direction of the coil, 3. The actuator according to claim 2, wherein the pair of first connecting bodies and the pair of second connecting bodies overlap the first coil holding portion and the second coil holding portion from one side in the first direction.

4. the yoke includes a pair of connecting portions extending in the first direction on both sides of the coil in the second direction and connecting the first opposing portion and the second opposing portion, Each of the pair of connecting portions is configured by stacking the first connecting plate portion and the second connecting plate portion, When viewed from the second direction, the first coil holding portion is disposed in a first notch portion formed by cutting out an edge of each of the pair of connection portions on one side in the third direction, The actuator according to claim 3, characterized in that the second coil holding portion is arranged in a second notch portion formed by cutting out an edge on the other side of the third direction in each of the pair of connection portions when viewed from the second direction.

5. the first holder member includes a pair of first holder protrusions protruding from both end edges of the first holder side plate portion in the second direction to the other side in the third direction, the second holder member includes a pair of second holder protrusions protruding from both end edges of the second holder side plate portion in the second direction to one side in the third direction, one of the pair of first connector fixing portions is disposed between the pair of first holder protrusions, 4. The actuator according to claim 3, wherein the other of the pair of first connector fixing portions is disposed between the pair of second holder protrusions.

6. The case is a first case member including a first end plate portion facing the movable body from one side in the first direction, and a pair of first case side plate portions extending from both end edges of the first end plate portion in the second direction to the other side in the first direction; 6. The actuator according to claim 5, wherein the first holder protrusion and the second holder protrusion are press-fitted between the pair of first case side plate portions.

7. the first plate and the second plate each include a central plate portion disposed between the pair of connection portions and overlapping the coil, a first side plate portion extending from the central plate portion to one side in the third direction and overlapping the first coil holding portion, and a second side plate portion extending from the central plate portion to the other side in the third direction and overlapping the second coil holding portion, a central bent portion bent in the first direction and covering a side surface of the coil in the second direction is provided at both ends of the central plate portion in the second direction; a width in the second direction of the one side plate portion and the other side plate portion is greater than a width in the second direction of the central plate portion, one of the pair of first connecting bodies is connected to the one side plate portion of the first plate, 5. The actuator according to claim 4, wherein the other of the pair of first connectors is connected to the other side plate portion of the first plate.

8. The actuator according to claim 7 , wherein the length of the first connector in the second direction is greater than the width of the central plate portion in the second direction.

9. The actuator described in claim 7, characterized in that both ends of the one side plate portion of the first plate in the second direction and both ends of the other side plate portion of the first plate in the second direction are each provided with a fixing bent portion that bends toward the other side in the first direction and engages with end surfaces on both sides of the first coil holding portion and the second coil holding portion in the second direction.

10. the first yoke includes a flat-plate-shaped first inner member overlapping the coil from one side in the first direction, and a first outer member overlapping the first inner member from one side in the first direction, 2. The actuator according to claim 1, wherein the second yoke comprises a flat second inner member that overlaps the coil from the other side in the first direction, and a second outer member that overlaps the second inner member from the other side in the first direction.

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