Actuator

Abstract

This actuator provides a mechanism that reduces the risk of wire breakage even when it is not possible to create slack in the lead wire. [Solution] The lead wire 84A drawn out from the coil 82A of the actuator 1 is housed in a guide groove that extends from the coil placement hole to the substrate holding portion 90 on the Z1 direction surface of the plate portion 12 of the coil holder 10. The bottom surface 63 of the guide groove comprises a first region 64 which is the end on the coil placement hole side, a second region 65 which is the end on the substrate holding portion 90 side, and a third region 66 which connects the first region 64 and the second region 65. The first region 64 is a convex curved surface that slopes toward the Z2 direction as it approaches the coil placement hole side. The second region 65 is a convex curved surface that slopes toward the Z2 direction as it approaches the substrate holding portion 90 side.

Description

Technical Field

[0001] The present invention relates to an actuator.

Background Art

[0002] Patent Documents 1 and 2 describe an actuator in which a movable body provided with a magnet and a support body provided with a coil are connected via a connecting body made of an elastic body or a viscoelastic body, and the movable body is vibrated with respect to the support body by flowing a driving current through the coil. The support bodies of Patent Documents 1 and 2 include a coil holder provided with a coil placement hole. The lead wire of the coil wire drawn out from the coil placed in the coil placement hole is accommodated in a groove formed on the surface of the coil holder, drawn out to the longitudinal end surface of the coil holder, and connected to a power supply board fixed to the longitudinal end surface of the coil holder.

[0003] When an impact is applied to the actuator due to dropping or the like, a large tension may be applied to the lead wire connecting the coil and the power supply board, resulting in disconnection. Therefore, in Patent Document 1, a slack is provided in the portion of the lead wire that is routed from the outlet of the groove in which the lead wire is disposed in the coil holder to the surface of the power supply board. Similarly, in Patent Document 2, a recess is provided on the bottom surface of the groove in which the lead wire is disposed, and a slack is provided in the lead wire within the groove. Providing a slack in the lead wire can avoid applying a large tension to the lead wire. Therefore, the risk of disconnection can be reduced.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventionally, as described in Patent Documents 1 and 2, configurations have been adopted to avoid wire breakage by providing slack in the lead wires between the coil and the power supply board. However, depending on the manufacturing method used when assembling the actuator, it may not be possible to provide slack.

[0006] The objective of this invention is to propose an actuator that can reduce the risk of wire breakage even when it is not possible to create slack in the lead wire. [Means for solving the problem]

[0007] To solve the above problems, one aspect of the actuator of the present invention comprises a support and a movable body, a connecting body having at least one of elasticity and viscoelasticity and positioned at a location where the movable body and the support face each other and connecting the movable body and the support, a coil disposed in a coil holder provided on the support, and a magnet disposed on the movable body and facing the coil in a first direction, and a magnetic drive circuit that vibrates the movable body in a second direction intersecting the first direction with respect to the support, wherein the coil holder is The device comprises a plate portion provided with coil placement holes, and a substrate holding portion provided at the outer peripheral end of the plate portion, wherein the lead wires drawn out from the coil are housed in a guide groove extending from the coil placement holes to the substrate holding portion on one side surface of the plate portion in the first direction, and are soldered to a power supply substrate held by the substrate holding portion, the bottom surface of the guide groove comprises a first region which is the end on the coil placement hole side, a second region which is the end on the substrate holding portion side, and a third region connecting the first region and the second region, the first region being the coil placement The first region is a convex curved surface that slopes toward the other side of the first direction as it approaches the hole, and the second region is a convex curved surface that slopes toward the other side of the first direction as it approaches the substrate holding portion. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of the actuator. [Figure 2] Figure 2 is an exploded perspective view of the actuator. [Figure 3] Figure 3 is a cross-sectional view of the actuator when it is cut in the YZ plane. [Figure 4] Figure 4 is a cross-sectional view of the actuator when it is cut in the XZ plane. [Figure 5] Figure 5 is an exploded perspective view of the coil holder, plate, coil, and power supply board as seen from the Z2 direction. [Figure 6] Figure 6 is an exploded perspective view of the coil holder, plate, coil, and power supply board as seen from the Z1 direction. [Figure 7] Figure 7 is a partial plan view of the coil holder. [Figure 8] Figure 8 is a partial perspective view of the coil holder. [Figure 9] Figure 9 is a front view of the coil holder and power supply board. [Figure 10] Figure 10 is a cross-sectional view of the guide groove and leader wire. [Figure 11] Figure 11 is a cross-sectional view of the actuator when it is cut in the XY plane. [Modes for carrying out the invention]

[0009] Embodiments of the actuator will be described below with reference to the drawings. In this specification, the three directions, Z, Y, and X, are mutually orthogonal. The Z direction is the first direction. The Y direction is the second direction. The X direction is the third direction. One side of the Z direction is designated as the Z1 direction, and the other side of the Z direction is designated as the Z2 direction. One side of the Y direction is designated as the Y1 direction, and the other side of the Y direction is designated as the Y2 direction. One side of the X direction is designated as the X1 direction, and the other side of the X direction is designated as the X2 direction.

[0010] (Overall structure) Figure 1 is an external perspective view of actuator 1. Figure 2 is an exploded perspective view of actuator 1. Figure 3 is a cross-sectional view of actuator 1 when cut in the YZ plane, and is a cross-sectional view taken at position AA in Figure 1. Figure 4 is a cross-sectional view of actuator 1 when cut in the XZ plane, and is a cross-sectional view taken at position BB in Figure 1. Figure 5 is an exploded perspective view of coil holder 10, plate 4, coils 82A and 82B, and power supply board 9 viewed from the Z2 direction. Figure 6 is an exploded perspective view of coil holder 10, plate 4, coils 82A and 82B, and power supply board 9 viewed from the Z1 direction.

[0011] Actuator 1 is used as a tactile device that transmits information through vibration. As shown in Figure 1, Actuator 1 has a rectangular parallelepiped shape with the Y direction as its longitudinal direction. The Z direction is the thickness direction of Actuator 1. As shown in Figures 3 and 4, Actuator 1 has a support body 2 and a movable body 5 housed inside the support body 2. Actuator 1 also includes a connecting body 7 that connects the support body 2 and the movable body 5, and a magnetic drive circuit 8 that moves the movable body 5 relative to the support body 2 in the Y direction. The connecting body 7 is positioned where the movable body 5 and the support body 2 face each other in the Z direction. The connecting body 7 has at least one of elasticity and viscoelasticity.

[0012] The magnetic drive circuit 8 comprises magnets 81A and 81B positioned on the movable body 5, and coils 82A and 82B positioned on the support body 2. The support body 2 comprises a power supply board 9 that supplies power to coils 82A and 82B. Magnets 81A and 81B are aligned in the Y direction. Coils 82A and 82B are aligned in the Y direction. As shown in Figure 3, magnet 81A and coil 82A face each other in the Z direction, and magnet 81B and coil 82B face each other in the Z direction. Coil 82A, located on the Y1 side, is the first coil. The coil 82B located on side 2 is the second coil. As shown in Figure 2, coils 82A and 82B are oval-shaped air-core coils that are long in the X direction. Each coil 82A and 82B has two effective sides that extend in the X direction. Therefore, the magnetic drive circuit 8 generates a magnetic driving force that causes the movable body 5 to vibrate in the Y direction relative to the support 2.

[0013] (Support) As shown in FIGS. 1 and 2, the support 2 includes a coil holder 10, a first case 21 that overlaps the coil holder 10 from the Z1 direction, and a second case 22 that overlaps the coil holder 10 from the Z2 direction. The first case 21, the coil holder 10, and the second case 22 are made of resin. The first case 21, the coil holder 10, and the second case 22 are joined by four screws 23. The screws 23 are passed through fixing holes 24 penetrating the four corners of the first case 21 in the Z direction and fixing holes 11 penetrating the four corners of the coil holder 10 in the Z direction, and are screwed into fixing holes 25 provided at the four corners of the second case 22.

[0014] The first case 21 includes a first end plate portion 26 that is rectangular when viewed from the Z direction, edge portions 27 that project in the Z2 direction from both ends in the Y direction and both ends in the X direction of the first end plate portion 26. Recesses 28 that are recessed in the Z1 direction are provided at the four corners of the first end plate portion 26. Inside the first case 21, a boss portion (not shown) having a shape surrounding the recesses 28 is provided, and the edge portions 27 of the first case 21 are cut away at the four corners where the boss portion is provided. As shown in FIG. 1, at the locations where the edge portions 27 are cut away, the boss portions 16 of the coil holder 10 described later are fitted. The fixing holes 24 penetrate the first case 21 at the four corners where the recesses 28 are provided.

[0015] The second case 22 includes a second end plate portion 29 that is rectangular when viewed from the Z direction, edge portions 30 that project in the Z1 direction from both ends in the X direction and the end in the Y2 direction of the second end plate portion 29, and boss portions 31 that project in the Z2 direction from the four corners of the second end plate portion 29. The fixing holes 25 open at the tip surfaces of the boss portions 31.

[0016] The coil holder 10 includes a plate portion 12 provided with two coil placement holes 80A and 80B, a first end plate portion 13 provided at an end of the plate portion 12 in the Y1 direction, a second end plate portion 14 provided at an end of the plate portion 12 in the Y2 direction, and edge portions 15 provided at both ends of the plate portion 12 in the X direction. The first end plate portion 13, the second end plate portion 14, and the edge portions 15 project to both sides of the plate portion 12 in the Z direction. Boss portions 16 projecting to both sides of the plate portion 12 in the Z direction are provided at both ends of the first end plate portion 13 in the X direction and at both ends of the second end plate portion 14 in the third direction, respectively. The fixing holes 11 penetrate through the four boss portions 16.

[0017] Of the four boss portions 16, positioning pins 17 project in the Z1 direction and the Z2 direction, respectively, from the two boss portions 16 provided at the end in the Y1 direction. The positioning pin 17 projecting in the Z1 direction fits into a positioning hole 32 opening into the recess 28 of the first case 21. The positioning pin 17 projecting in the Z2 direction fits into a positioning hole 33 provided in the boss portion 31 of the second case 22.

[0018] The coil placement holes 80A and 80B penetrate through the plate portion 12 in the Z direction. The coil placement hole 80A located on the Y1 side is the first coil placement hole. The coil placement hole 80B located on the Y2 side is the second coil placement hole. The coil holder 10 includes a first through portion 18 provided between the coil placement hole 80A and the first end plate portion 13 and a second through portion 19 provided between the coil placement hole 80B and the second end plate portion 14. The first through portion 18 and the second through portion 19 are rectangular when viewed from the Z direction and penetrate through the plate portion 12 in the Z direction.

[0019] (Substrate holding portion) As shown in FIGS. 1 and 2, a power supply substrate 9 is held at an end of the coil holder 10 in the Y1 direction. The first end plate portion 13 includes a substrate holding portion 90 for holding the power supply board 9. The substrate holding portion 90 includes a substrate housing recess 91 that is recessed in the Y2 direction, a pair of slits 92 provided at both ends of the substrate housing recess 91 in the X direction, and a substrate receiving portion 94 that protrudes in the Y1 direction from the center of the end of the substrate housing recess 91 in the Z1 direction. The slits 92 extend in the Z direction and face the X direction. The power supply board 9 is mounted with both ends in the X direction inserted into the slits 92 and in contact with the substrate receiving portion 94 from the Z2 direction. The substrate receiving portion 94 fits into a notch 95 (see Figure 5) provided at the center of the edge of the power supply board 9 in the Z1 direction.

[0020] (plate) As shown in Figures 3 and 4, the support 2 includes a plate 4 attached to the coil holder 10 from the Z2 direction. The plate 4 is made of a non-magnetic metal. As shown in Figures 5 and 6, the plate 4 includes a flat portion 41 that overlaps the plate portion 12 from the Z2 direction, two claw portions 42 provided at both ends of the flat portion 41 in the X direction, and four claw portions 43 provided at both ends of the flat portion 41 in the Y direction in the X direction. The two claw portions 42 protrude diagonally in the Z2 direction outward from both ends of the flat portion 41 in the X direction. The four claw portions 43 protrude diagonally in the Z1 direction outward from both ends of the flat portion 41 in the Y direction.

[0021] As shown in Figure 4, the two claw portions 42 elastically contact the edge portion 15 of the coil holder 10 from the inside when the plate 4 is assembled to the coil holder 10. Similarly, the four claw portions 43 elastically contact the boss portion 16 of the coil holder 10 from the inside when the plate 4 is assembled to the coil holder 10.

[0022] Furthermore, the plate 4 has notches in the central part in the X direction at both ends of the flat portion 41 in the Y direction, and the edges of the notches are provided with bent portions 44 that protrude in the Z1 direction. As shown in Figure 3, the two bent portions 44 fit into stepped portions provided on the inner surface in the Y2 direction of the first through portion 18 and on the inner surface in the Y1 direction of the second through portion 19.

[0023] (coil) As shown in Figures 5 and 6, coils 82A and 82B each have a winding section 83 in which the coil wire is wound in an oval shape. As shown in Figure 5, two lead wires 84A and 84B are drawn out from the Z1 side of the winding section 83 of coil 82A on the Y1 side. As shown in Figure 6, the lead wire 84A on the X1 side is drawn out from the center of the winding section 83 of coil 82A on the Y1 side. The lead wire 84B on the X2 side is drawn out from the outer edge of the winding section 83 of coil 82B on the Y2 side. The jumper wire 85 connecting coils 82A and 82B is drawn out from the center of the winding section 83 of coil 82B on the Y2 side and connected to the outer edge of the winding section 83 of coil 82A on the Y1 side.

[0024] As shown in Figures 2 and 5, on the Z1-side surface of the plate portion 12 of the coil holder 10, guide grooves 6 extending in the Y direction are provided on both sides of the first through portion 18 in the X direction. The lead wires 84A and 84B extending in the Y1 direction from the coils 82A and 82B are housed in the guide grooves 6 and routed to the substrate holding portion 90 provided on the Y1-side surface of the first end plate portion 13, and then soldered to the lands provided on the Y1-side surface of the power supply board 9.

[0025] When assembling actuator 1, coils 82A, 82B, plate 4, and power supply board 9 are attached to coil holder 10. At this time, adhesive 86 is placed around the winding portion 83 and into the central hole of the winding portion 83 to fix coils 82A and 82B with adhesive 86. This creates the coil assembly 3 shown in Figure 2. As shown in Figure 5, adhesive reservoirs 87 are provided on the inner circumferential surfaces of coil placement holes 80A and 80B, recessed toward the outer circumferential surface. The adhesive 86 injected from the adhesive reservoirs 87 spreads into the gap between the winding portion 83 and the inner circumferential surfaces of coil placement holes 80A and 80B, and into the gap between plate 4 and winding portion 83.

[0026] As shown in Figure 6, the two lead wires 84A and 84B and the connecting wire 85 are all routed along the Z2 side of the winding section 83. When assembling the coil assembly 3, coil 82A is placed in coil placement hole 80A and coil 82B is placed in coil placement hole 80B. At this time, the connecting wire 85 is passed along the Z2 side of the plate section 12. When the plate 4 is assembled to the plate section 12, the connecting wire 85 is housed in the gap between the plate section 12 and the flat section 41 of the plate 4. The lead wires 84A and 84B are housed in the gap between the winding section 83 and the flat section 41 of the plate 4, bent in the Z1 direction at the Y1 side edge of the winding section 83, and then housed in the guide groove 6.

[0027] (movable body) The movable body 5 comprises magnets 81A and 81B and a yoke 50. Magnet 81A is positioned at two locations on the coil 82A, in the Z1 and Z2 directions. Magnet 81B is positioned at two locations on the coil 82B, in the Z1 and Z2 directions.

[0028] The yoke 50 is made of a magnetic material. As shown in Figures 2, 3, and 4, the yoke 50 includes a first plate portion 51 facing the coils 82A and 82B from the Z1 direction, a second plate portion 52 facing the coils 82A and 82B from the Z2 direction, a first connecting plate portion 53 connecting the ends of the first plate portion 51 and the second plate portion 52 in the Y1 direction, and a second connecting plate portion 54 connecting the ends of the first plate portion 51 and the second plate portion 52 in the Y2 direction.

[0029] The yoke 50 is constructed by assembling two parts: a first yoke 55 consisting of a first plate portion 51, and a second yoke 56 comprising a second plate portion 52, a first connecting plate portion 53, and a second connecting plate portion 54. The ends of the first connecting plate portion 53 and the second connecting plate portion 54, which are bent in the Z2 direction from both ends of the second plate portion 52 in the Y direction, are joined to both ends of the first plate portion 51 in the Y direction by welding or the like.

[0030] Magnet 81A facing coil 82A from the Z1 direction and magnet 81B facing coil 82B from the Z1 direction are fixed to the first plate portion 51 of the yoke 50. Magnet 81A facing coil 82A from the Z2 direction and magnet 81B facing coil 82B from the Z2 direction are fixed to the second plate portion 52 of the yoke 50. As shown in Figure 3, the first connecting plate portion 53 of the yoke 50 extends in the Z direction within the first through portion 18 of the coil holder 10. The second connecting plate portion 54 extends in the Z direction within the second through portion 19 of the coil holder 10. The opening width in the Y direction of the first through portion 18 and the second through portion 19 is such that the first connecting plate portion 53 and the second connecting plate portion 54 do not collide with the inner surfaces of the first through portion 18 and the second through portion 19 when the movable body 5 vibrates in the Y direction with a predetermined stroke.

[0031] (connector) As shown in Figures 3 and 4, the connecting members 7 are positioned between the yoke 50 and the first case 21, and between the yoke 50 and the second case 22. The connecting members 7 are compressed in the Z direction between the yoke 50 and the first case 21, and between the yoke 50 and the second case 22. More specifically, two connecting members 7 aligned in the Y direction are positioned between the first plate portion 51 and the first end plate portion 26. Similarly, two connecting members 7 aligned in the Y direction are positioned between the second plate portion 52 and the second end plate portion 29. As shown in Figure 2, the connecting members 7 are rectangular parallelepipeds, and the four connecting members 7 are identical in shape.

[0032] The connector 7 comprises at least one of an elastic and a viscoelastic material. In this embodiment, the connector 7 is a gel-like member made of silicone gel. Silicone gel is a viscoelastic material in which the spring constant when deformed in the stretching direction is about three times that when deformed in the shear direction. When a viscoelastic material deforms in a direction intersecting the thickness direction (shear direction), it is deformed in the direction of stretching due to tension, and therefore has deformation characteristics in which the linear component is larger than the nonlinear component. Furthermore, when compressed and deformed by being pressed in the thickness direction, it has stretching characteristics in which the nonlinear component is larger than the linear component, while when stretched by being pulled in the thickness direction, the linear component is larger than the nonlinear component. It possesses large stretchability characteristics.

[0033] Alternatively, the connector 7 may be made of 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 elastomers, and modified materials thereof.

[0034] (Actuator operation) When current is supplied to coils 82A and 82B in a predetermined direction via the power supply board 9, the movable body 5, supported by the support body 2, moves relative to the support body 2 in the Y1 or Y2 direction due to the driving force of the magnetic drive circuit 8. When the direction of the current supplied to coils 82A and 82B is repeatedly reversed, the movable body 5 vibrates in the Y direction with a predetermined stroke relative to the support body 2. When the movable body 5 vibrates in the Y direction, the connecting body 7 undergoes shear deformation. When the supply of current to coils 82A and 82B is stopped, the movable body 5 returns to its origin position due to the elastic restoring force of the four connecting bodies 7 and is held in the origin position.

[0035] (Guide groove) Figure 7 is a partial plan view of the coil holder 10. Figure 8 is a partial perspective view of the coil holder 10. Figure 9 is a front view of the coil holder 10 and the power supply board 9. Figure 10 is a cross-sectional view of the guide groove 6 and the lead wire 84A, which is a cross-sectional view of the actuator 1 cut at position CC in Figure 7. As shown in Figures 7 and 8, the guide groove 6 extends from the coil placement hole 80A to the board holding portion 90 on the Z1 direction surface of the plate portion 12 of the coil holder 10.

[0036] As shown in Figures 7 and 9, the Y1-side end of the guide groove 6 penetrates the first end plate portion 13 of the coil holder 10 and connects to an opening 60 that opens on the surface of the substrate holding portion 90. Notches 96 are formed at both ends in the X direction of the Z1-direction end of the power supply substrate 9, cut out in the Z2 direction. When the power supply substrate 9 is attached to the substrate holding portion 90, as shown in Figure 9, the opening 60 of the guide groove 6 is located in the notches 96 of the power supply substrate 9. Therefore, the lead wires 84A and 84B are pulled out from the opening 60 to the notches 96 of the power supply substrate 9, bent in the Z2 direction, extend in the Z2 direction via the Z1-direction end of the power supply substrate 9, and are routed to lands provided on the surface of the power supply substrate 9.

[0037] As shown in Figure 7, the guide groove 6 comprises a straight section 61 extending linearly from the opening 60 toward the coil placement hole 80A, and a groove end 62 connecting the straight section 61 and the coil placement hole 80A. As shown in Figures 7 and 8, the groove width of the straight section 61 is constant, but the groove width of the groove end 62 widens toward the coil placement hole 80A. The groove end 62 comprises a pair of sides 621 and 622 facing each other in the X direction, which is the groove width direction of the guide groove 6. One side 621 has an R-shaped chamfered portion 623 that connects to the inner circumferential surface of the coil placement hole 80A in the Y1 direction. The other side 622 has an R-shaped chamfered portion 624 that connects to the inner circumferential surface of the coil placement hole 80A in the X1 or X2 direction.

[0038] As shown in Figure 10, the bottom surface 63 of the guide groove 6 has a shape that smoothly connects a convex curved surface and a flat surface, and has no corners. As shown in Figures 7 and 10, the bottom surface 63 of the guide groove 6 comprises a first region 64 which is the end on the coil placement hole 80A side, a second region 65 which is the end on the substrate holding portion 90 side, and a third region 66 which connects the first region 64 and the second region 65. The first region 64 and the second region 65 are convex curved surfaces. The third region 66 comprises a flat surface 67 that connects to the second region 65, and a convex curved surface 68 that connects to the first region 64. The flat surface 67 is a plane that follows the XY plane. The convex curved surface 68 connects smoothly to the flat surface 67. The tangent plane at the Y1 side end of the convex curved surface 68 is the same plane as the flat surface 67. The convex curved surface 68 as a whole is connected to the coil placement hole 8 As you move towards the 0A side (Y2 side), the surface slopes in the direction of Z2, but it is not a flat inclined surface; rather, it is a gently convex curved surface.

[0039] The first region 64 is a convex curved surface that slopes toward the Z2 direction as it approaches the coil placement hole 80A (Y2 direction). In this embodiment, the first region 64 is an arcuate surface. However, the first region 64 may be a curved surface other than an arcuate surface. The first region 64 smoothly connects to the Y2 side end of the third region 66. That is, the tangent plane at the Y2 side end of the convex curved surface 68 is the same plane as the tangent plane at the Y1 side end of the first region 64.

[0040] The second region 65 is a convex curved surface that slopes toward the Z2 direction as it approaches the substrate holding portion 90 (Y1 direction). In this embodiment, the second region 65 is an arcuate surface. However, the second region 65 may be a curved surface other than an arcuate surface. The second region 65 smoothly connects to the Y1 side end of the third region 66. That is, the flat surface 67 is coplane with the tangent plane at the Y2 side end of the second region 65.

[0041] As shown in Figures 8 and 10, the first region 64 extends to the Z2 end of the coil placement hole 80A. Also, as described above, the sides 621 and 622 of the guide groove 6 have an R shape where they connect to the inner circumferential surface of the coil placement hole 80A. Therefore, when the lead wires 84A and 84B are bent in the Z1 direction at the Y1 end of the winding portion 83 and pulled into the guide groove 6, they do not come into contact with the corners of the coil holder 10.

[0042] The second region 65 of the guide groove 6 connects to an opening 60 that opens to the surface of the substrate holding portion 90. As shown in Figure 10, the tangent plane at the Y1-side end of the second region 65 is a plane along the XZ plane, and the Y1-side end of the second region 65 connects smoothly to the surface of the substrate housing recess 91. Therefore, when the lead wires 84A and 84B are pulled out from the opening 60 and bent in the Z2 direction, they do not come into contact with the corners of the coil holder 10.

[0043] (Percentage of prescription) In actuator 1, when subjected to impact such as a fall, the movable body 5 may move in the Y direction greater than the vibration stroke when driven by the magnetic drive circuit 8. In that case, the contact portion provided on the support 2 and the yoke 50 will collide in the Y direction. In this embodiment, the first case 21 and the second case 22 are each provided with a contact portion that collides with the yoke 50 in the Y direction.

[0044] The yoke 50 is provided with a yoke-side contact portion that collides with the contact portion of the support 2 in the Y direction. As shown in Figure 2, the width of the first plate portion 51 and the second plate portion 52 of the yoke 50 in the X direction is greater than that of the first connecting plate portion 53 and the second connecting plate portion 54. The yoke-side contact portions are provided at both ends of the first plate portion 51 and the second plate portion 52 in the X direction.

[0045] As shown in Figure 2, the yoke-side contact portion comprises a yoke-side first contact portion 57 provided at the Y1 direction end of the yoke 50, and a yoke-side second contact portion 58 provided at the Y2 direction end of the yoke 50. The yoke-side first contact portion 57 is provided at four locations: both ends in the X direction at the Y1 direction end of the first plate portion 51, and both ends in the X direction at the Y1 direction end of the second plate portion 52. The four yoke-side first contact portions 57 coincide in the Y direction. The yoke-side second contact portions 58 are provided at four locations: both ends in the X direction at the Y2 direction end of the first plate portion 51, and both ends in the X direction at the Y2 direction end of the second plate portion 52. The four yoke-side second contact portions 58 coincide in the Y direction.

[0046] As shown in Figure 2, the second case 22 has two yoke-side first-degree contact portions 57 provided on the second plate portion 52 and a first-degree contact portion 34 facing the second plate portion 52 in the Y direction, and is provided on the second plate portion 52 It is equipped with two yoke-side second contact portions 58 and a second contact portion 35 facing it in the Y direction. As shown in Figure 2, of the boss portions 31 provided at the four corners of the second case 22, the two boss portions 31 located at the Y1 end of the second case 22 have their Y2 side surfaces functioning as first contact portions 34. Also, the two boss portions 31 located at the Y2 end of the second case 22 have their Y1 side surfaces functioning as second contact portions 35.

[0047] As described above, the inside of the first case 21 is provided with a structure similar to that of the first contact portion 34 and the second contact portion 35 of the second case 22. Specifically, the inside of the first case 21 is provided with boss portions (not shown) through which the fixing holes 24 pass, at four corners. Two boss portions (not shown) provided at the Y1 end of the first case 21 function as first contact portions that face in the Y direction opposite to the two yoke-side first contact portions 57 provided on the first plate portion 51. Also, two boss portions (not shown) provided at the Y2 end of the first case 21 function as second contact portions that face in the Y direction opposite to the two yoke-side second contact portions 58 provided on the first plate portion 51.

[0048] The first contact portion provided in the first case 21 coincides with the position of the first contact portion 34 of the second case 22 in the Y direction. Also, the second contact portion provided in the first case 21 coincides with the position of the second contact portion 35 of the second case 22 in the Y direction.

[0049] (Collision avoidance structure around the first penetration section) Figure 11 is a cross-sectional view of the actuator 1 when it is cut in the XY plane, and is a cross-sectional view taken at position DD in Figure 3. When the movable body 5 vibrates in the Y direction, the first connecting plate portion 53 of the yoke 50 moves in the Y direction within the first through portion 18 of the coil holder 10, and the second connecting plate portion 54 moves in the Y direction within the second through portion 19 of the coil holder 10.

[0050] As described above, in this embodiment, when the movable body 5 moves in the Y direction by a displacement greater than a predetermined vibration stroke, the yoke 50 collides with the contact point provided on the support 2. However, when an impact is applied, such as by dropping, the movable body 5 may tilt or move to a position away from the contact point, potentially causing it to move even larger in the Y direction. In such cases, the actuator 1 ensures that the second connecting plate portion 54 collides with the inner surface of the second through portion 19 in the Y direction before the first connecting plate portion 53 collides with the inner surface of the first through portion 18.

[0051] When the first connecting plate portion 53 collides with the inner surface of the first through portion 18 in the Y direction, an impact in the Y1 direction is applied to the first end plate portion 13 on which the substrate holding portion 90 is provided, or an impact in the Y2 direction is applied to the portion of the plate portion 12 on which the coil 82A is held. As a result, a large tension is applied to the lead wires 84A and 84B that extend in the Y direction from the coil 82A to the power supply board 9, which may cause them to break. Therefore, the actuator 1 is configured to prevent the breakage of the lead wires 84A and 84B by avoiding a collision in the Y direction between the first connecting plate portion 53 and the inner surface of the first through portion 18.

[0052] As shown in Figure 11, the inner surface of the first through-hole 18 is provided with a first opposing portion T1 facing the first connecting plate portion 53 from the Y1 side (i.e., the side of the power supply board 9), and a second opposing portion T2 facing the first connecting plate portion 53 from the Y2 side (i.e., the side opposite to the power supply board 9). The distance in the Y direction between the first opposing portion T1 and the first connecting plate portion 53 is defined as the first distance S1, and the distance in the Y direction between the second opposing portion T2 and the first connecting plate portion 53 is defined as the second distance S2.

[0053] Similarly, the inner surface of the second through portion 19 is provided with a third opposing portion T3 facing the second connecting plate portion 54 from the Y1 side (i.e., the side of the power supply board 9), and a fourth opposing portion T4 facing the second connecting plate portion 54 from the Y2 side (i.e., the side opposite to the power supply board 9). The distance in the Y direction between the third opposing portion T3 and the second connecting plate portion 54 is defined as the third distance S3, and the distance between the fourth opposing portion T4 and the second connecting plate portion 54 Let the distance in the Y direction be the fourth distance S4.

[0054] The coil holder 10 has different opening widths in the Y direction for the first through-hole 18 and the second through-hole 19, with the first through-hole 18 having a larger opening width in the Y direction than the second through-hole 19. The first connecting plate portion 53 and the second connecting plate portion 54 are arranged such that the first distance S1 is greater than the third distance S3, and the second distance S2 is greater than the fourth distance S4. If S1 > S3, when the movable body 5 moves in the Y1 direction, the first connecting plate portion 53 will not collide with the first opposing portion T1 before the second connecting plate portion 54 collides with the third opposing portion T3. Also, if S2 > S4, when the movable body 5 moves in the Y2 direction, the first connecting plate portion 53 will not collide with the second opposing portion T2 before the second connecting plate portion 54 collides with the fourth opposing portion T4. Therefore, it is possible to avoid large tension being applied to the lead wires 84A and 84B, which could cause them to break.

[0055] Figure 11 shows the Y-direction positions of the first contact portion 34 and the second contact portion 35 provided in the second case 22 with dashed lines. Also, the Y-direction positions of the yoke-side first contact portion 57 and the yoke-side second contact portion 58 provided in the second plate portion 52 of the yoke 50 are shown with dashed lines. The Y-direction distance between the first contact portion 34 and the yoke-side first contact portion 57 is defined as the fifth distance S5, and the Y-direction distance between the second contact portion 35 and the yoke-side second contact portion 58 is defined as the sixth distance S6.

[0056] Furthermore, since the Y-direction positions of the first-degree contact portion and the second-degree contact portion coincide in the first case 21 and the second case 22, the Y-direction distance between the first-degree contact portion (not shown) of the first case 21 and the yoke-side first-degree contact portion 57 coincides with the fifth distance S5, and the Y-direction distance between the second-degree contact portion (not shown) of the first case 21 and the yoke-side second-degree contact portion 58 coincides with the sixth distance S6.

[0057] As described above, in this embodiment, when the movable body 5 moves in the Y direction, the contact portion of the support 2 and the yoke 50 are configured to collide first. Therefore, the fifth distance S5 is smaller than the third distance S3, and the sixth distance S6 is smaller than the fourth distance S4.

[0058] (Main effects and benefits of this form) As described above, the actuator 1 of this embodiment includes a support body 2 and a movable body 5, a connecting body 7 having at least one of elasticity and viscoelasticity and positioned where the movable body 5 and the support body 2 face each other to connect the movable body 5 and the support body 2, and a magnetic drive circuit 8 which includes coils 82A and 82B arranged in a coil holder 10 provided on the support body 2, and magnets 81A and 81B arranged on the movable body 5 and facing the coils 82A and 82B in the Z direction, causing the movable body 5 to vibrate in the Y direction intersecting the Z direction with respect to the support body 2. The coil holder 10 includes a plate portion 12 provided with coil arrangement holes 80A and 80B in which the coils 82A and 82B are arranged, and a substrate holding portion 90 provided at the outer peripheral end of the plate portion 12. The lead wires 84A and 84B drawn from coils 82A and 82B are housed in guide grooves 6 that extend from the coil placement holes 80A to the substrate holding portion 90 on the Z1-direction surface of the plate portion 12, and are soldered to the power supply board 9 held by the substrate holding portion 90. The bottom surface 63 of the guide groove 6 comprises a first region 64 which is the end on the coil placement hole 80A side, a second region 65 which is the end on the substrate holding portion 90 side, and a third region 66 which connects the first region 64 and the second region 65. The first region 64 is a convex curved surface that slopes in the Z2 direction as it approaches the coil placement hole 80A side. The second region 65 is a convex curved surface that slopes in the Z2 direction as it approaches the substrate holding portion 90 side.

[0059] Thus, in this embodiment, the bottom surface 63 of the guide groove 6 has a convex curved surface at both the end on the coil placement hole 80A side and the end on the substrate holding part 90 side, and there are no corners. This makes it possible to reduce bending of the lead wires 84A and 84B that connect the coils 82A and 82B to the power supply board 9. Therefore, there is less risk of wire breakage caused by bending of the lead wires 84A and 84B. There is no need to leave slack in lines 84A and 84B.

[0060] In this embodiment, the third region 66 of the bottom surface 63 of the guide groove 6 connects smoothly with the first region 64 and the second region 65. Therefore, since there are no corners on the entire bottom surface 63 of the guide groove 6, bending of the leader wires 84A and 84B can be further reduced. Consequently, the risk of wire breakage due to bending of the leader wires 84A and 84B is reduced.

[0061] In this embodiment, the third region 66 of the bottom surface 63 of the guide groove 6 includes a convex curved surface 68 that is inclined with respect to a direction perpendicular to the Z direction. The convex curved surface 68 has a gently curving shape. By providing such a gentle slope shape, the bending of the lead wires 84A and 84B can be mitigated even when the lead wires 84A and 84B are drawn out from the Z2 end of the coil arrangement hole 80A.

[0062] Furthermore, in order to create a gentle slope shape, a flat inclined surface can be provided instead of the convex curved surface 68. In this case, it is preferable to provide a short convex curved surface between the inclined surface and the flat surface 67 in order to smoothly connect the inclined surface and the flat surface 67. It is also preferable to smoothly connect the inclined surface and the first region 64.

[0063] In this embodiment, the third region 66 of the bottom surface 63 of the guide groove 6 includes a flat surface 67 perpendicular to the Z direction. Depending on the length of the guide groove 6 in the Y direction and the depth of the coil placement hole 80A, it may be better to provide a flat surface 67 in order to create a shape in which the entire bottom surface 63 is smoothly connected.

[0064] Furthermore, if the entire bottom surface 63 can be smoothly connected even without the flat surface 67, the flat surface 67 may be removed from the third region 66, and the entire surface may be a convex curved surface or an inclined surface.

[0065] In this embodiment, the groove end 62 on the coil placement hole 80A side of the guide groove 6 widens as it approaches the coil placement hole 80A. Therefore, when pulling the lead wires 84A and 84B into the groove end 62, bending of the lead wires 84A and 84B can be reduced.

[0066] In this embodiment, the groove end 62 on the coil placement hole 80A side of the guide groove 6 is provided with a pair of side surfaces 621 and 622 facing each other in the groove width direction. Each of the pair of side surfaces 621 and 622 is provided with R-shaped chamfered portions 623 and 624 that connect to the inner circumferential surfaces of the coil placement holes 80A and 80B. This makes it possible to further reduce the bending of the leader wires 84A and 84B when they are pulled into the groove end 62.

[0067] In this embodiment, the second region 65 of the bottom surface 63 of the guide groove 6 is connected to an opening 60 that opens onto the surface of the substrate holding portion 90. The lead wires 84A and 84B extend from the opening 60 in the Z2 direction and are routed to the surface of the power supply substrate 9 via the end of the power supply substrate 9, which is located in the Z2 direction from the second region 65. In this way, if the end of the power supply substrate 9 is located in the Z2 direction from the second region 65, the bending of the lead wires 84A and 84B when they cross over the end of the power supply substrate 9 can be mitigated.

[0068] In this embodiment, the guide groove 6 is provided on the surface of the plate portion 12 in the Z1 direction, and the substrate holding portion 90 is positioned at the end of the plate portion 12 in the Y1 direction. The plate portion 12 is provided with a coil placement hole 80A and a coil placement hole 80B located in the Y2 direction of the coil placement hole 80A, and includes a coil 82A positioned in coil placement hole 80A and a coil 82B positioned in coil placement hole 80B. The coil placement holes 80A and 80B are covered by a plate 4 that overlaps the plate portion 12 from the Z2 direction. A jumper wire 85 connecting the coils 82A and 82B is positioned in the gap between the plate portion 12 and the plate 4. Lead wires 84A and 84B extend from the Z2 end of the coil 82A to the guide groove 6.

[0069] In this way, by arranging the lead wires 84A, 84B and the jumper wire 85 on the side covered by plate 4, the lead wires 84A, 84B and the jumper wire 85 are not exposed on the surface of coils 82A, 82B. Therefore, the lead wires 84A, 84B and the jumper wire 85 are raised away from the surface of coils 82A, 82B, reducing the risk of disconnection due to contact with other components.

[0070] (summary) The present invention can take the following forms. (1) Support body and movable body, A connecting body having at least one of elasticity and viscoelasticity, positioned at a location where the movable body and the support body face each other, and connecting the movable body and the support body, The device comprises a coil disposed in a coil holder provided on the support, and a magnetic drive circuit that comprises a magnet disposed on the movable body and facing the coil in a first direction, and causes the movable body to vibrate in a second direction intersecting the first direction with respect to the support, The coil holder comprises a plate portion provided with coil arrangement holes in which the coil is placed, and a substrate holding portion provided at the outer peripheral end of the plate portion. The lead wires drawn from the coil are housed in guide grooves extending from the coil placement hole to the substrate holding portion on one side of the plate portion in the first direction, and are soldered to the power supply board held by the substrate holding portion. The bottom surface of the guide groove comprises a first region which is the end on the coil placement hole side, a second region which is the end on the substrate holding portion side, and a third region which connects the first region and the second region. The first region is a convex curved surface that slopes toward the other side of the first direction as it moves toward the side of the coil arrangement hole, The actuator is characterized in that the second region is a convex curved surface that slopes toward the other side of the first direction as it moves toward the substrate holding portion.

[0071] (2) The actuator according to (1) above, characterized in that the third region is smoothly connected to the first region and the second region.

[0072] (3) The actuator according to (1) above, characterized in that the third region includes an inclined surface or a convex curved surface that is inclined with respect to a direction perpendicular to the first direction.

[0073] (4) The actuator according to (1) above, characterized in that the third region includes a flat surface perpendicular to the first direction.

[0074] (5) The actuator according to (1) above, characterized in that the groove end on the coil placement hole side of the guide groove widens as it approaches the coil placement hole side.

[0075] (6) The groove end has a pair of sides facing each other in the groove width direction, The actuator according to (5) above, characterized in that each of the pair of sides has an R-shaped chamfered portion that connects to the inner circumferential surface of the coil arrangement hole.

[0076] (7) The second region is connected to an opening that opens on the surface of the substrate holding portion. The actuator according to (1) above, characterized in that the lead wire extends from the opening to the other side in the first direction, passes through the end of the power supply board located on the other side in the first direction from the second region, and is routed to the surface of the power supply board.

[0077] (8) The guide groove is provided on one side of the plate portion in the first direction, The substrate holding portion is positioned at one end of the plate portion in the second direction, The plate portion is provided with a first coil arrangement hole and a second coil arrangement hole located on the other side of the first coil arrangement hole in the second direction. The coil comprises a first coil positioned in the first coil positioning hole and a second coil positioned in the second coil positioning hole. The first coil placement hole and the second coil placement hole are covered by a plate that overlaps the plate portion from the other side in the first direction. The connecting wire between the first coil and the second coil is placed in the gap between the plate and the board portion. The actuator according to (1) above, characterized in that the lead wire extends from the other end of the first coil in the first direction to the guide groove. [Explanation of symbols]

[0078] 1…Actuator, 2…Support, 3…Coil assembly, 4…Plate, 5…Movable body, 6…Guide groove, 7…Connector, 8…Magnetic drive circuit, 9…Power supply board, 10…Coil holder, 11…Fixing hole, 12…Plate section, 13…First end plate section, 14…Second end plate section, 15…Edge section, 16…Boss section, 17…Positioning pin, 18…First through section, 19…Second through section, 21…First case, 22…Second case, 24… Fixing hole, 25… Fixing hole, 26… First end plate section, 27… Edge section, 28… Recess, 29… Second end plate section, 30… Edge section, 31… Boss section, 32, 33… Positioning hole, 34… First contact section, 35… Second contact section, 41… Flat section, 42, 43… Claw section, 44… Bent section, 50… Yoke, 51… First plate section, 52… Second plate section, 53… First connecting plate section, 54… Second connecting plate section, 55… First yoke, 56… Second Yoke, 57...Yoke side first contact section, 58...Yoke side second contact section, 60...Opening, 61...Straight section, 62...Groove end, 63...Bottom surface, 64...First region, 65...Second region, 66...Third region, 67...Flat surface, 68...Convex curved surface, 80A, 80B...Coil placement holes, 81A, 81B...Magnet, 82A, 82B...Coil, 83...Winding section, 84A, 84B...Leader wire, 85...Connector wire, 86... Adhesive, 87...Adhesive reservoir, 90...Substrate holding part, 91...Substrate housing recess, 92...Slit, 94...Substrate receiving part, 95, 96...Notch part, 621, 622...Side, 623, 624...Chamfered part, S1...First distance, S2...Second distance, S3...Third distance, S4...Fourth distance, S5...Fifth distance, S6...Sixth distance, T1...First opposing part, T2...Second opposing part, T3...Third opposing part, T4...Fourth opposing part

Claims

1. Support body and movable body, A connecting body having at least one of elasticity and viscoelasticity, positioned at a location where the movable body and the support body face each other, and connecting the movable body and the support body, The device comprises a coil disposed in a coil holder provided on the support, and a magnetic drive circuit which is disposed on the movable body and faces the coil in a first direction, causing the movable body to vibrate in a second direction intersecting the first direction relative to the support, The coil holder comprises a plate portion provided with coil arrangement holes in which the coil is placed, and a substrate holding portion provided at the outer peripheral end of the plate portion. The lead wires drawn from the coil are housed in guide grooves extending from the coil placement hole to the substrate holding portion on one side of the plate portion in the first direction, and are soldered to the power supply board held by the substrate holding portion. The bottom surface of the guide groove comprises a first region which is the end on the coil placement hole side, a second region which is the end on the substrate holding portion side, and a third region which connects the first region and the second region. The first region is a convex curved surface that slopes toward the other side of the first direction as it moves toward the side of the coil arrangement hole, The actuator is characterized in that the second region is a convex curved surface that slopes toward the other side of the first direction as it moves toward the substrate holding portion.

2. The actuator according to claim 1, characterized in that the third region is smoothly connected to the first region and the second region.

3. The actuator according to claim 1, characterized in that the third region includes an inclined surface or a convex curved surface that is inclined with respect to a direction perpendicular to the first direction.

4. The actuator according to claim 1, characterized in that the third region includes a flat surface perpendicular to the first direction.

5. The actuator according to claim 1, characterized in that the groove end on the coil placement hole side of the guide groove widens as it approaches the coil placement hole side.

6. The groove end has a pair of sides facing each other in the groove width direction, The actuator according to claim 5, characterized in that each of the pair of sides is provided with an R-shaped chamfered portion that connects to the inner circumferential surface of the coil arrangement hole.

7. The second region is connected to an opening that opens to the surface of the substrate holding portion. The actuator according to claim 1, characterized in that the lead wire extends from the opening to the other side in the first direction, passes through the end of the power supply board located on the other side in the first direction from the second region, and is routed to the surface of the power supply board.

8. The guide groove is provided on one side of the plate portion in the first direction, The substrate holding portion is positioned at one end of the plate portion in the second direction, The plate portion is provided with a first coil arrangement hole and a second coil arrangement hole located on the other side of the first coil arrangement hole in the second direction. The coil comprises a first coil placed in the first coil placement hole and a second coil placed in the second coil placement hole. The first coil placement hole and the second coil placement hole are covered by a plate that overlaps the plate portion from the other side in the first direction. The connecting wire between the first coil and the second coil is placed in the gap between the plate and the board portion. The actuator according to claim 1, characterized in that the lead wire extends from the other end of the first coil in the first direction to the guide groove.

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