JP2024073817A - Actuator - Google Patents

Abstract

In an actuator that vibrates a movable body by a magnetic drive circuit, the amplitude and weight of the movable body are increased, while an increase in the length of the lead wire of the coil wire and an increase in the complexity of the route for routing the coil wire are suppressed.
[Solution] A support 2 of an actuator 1 includes a coil holding portion 31 that holds a plurality of coils 6 lined up in a second direction X. A yoke 80 includes a first plate portion 81 facing the coil holding portion 31 in the Z1 direction, a second plate portion 82 facing the coil holding portion 31 in the Z2 direction, and a pair of connecting plate portions 83, 84 disposed on both sides of the coil holding portion 31 in the third direction Y and connecting the first plate portion 81 and the second plate portion 82. The connecting plate portion 83 is provided with an opening 87 through which a lead wire 60 drawn from the coil 6 in the Y1 direction passes.
[Selected figure] Figure 4

Description

The present invention relates to an actuator that vibrates a movable body.

Patent document 1 describes an actuator having a support and a movable body, a connector that connects the movable body to the support, and a magnetic drive circuit that moves the movable body relative to the support. The actuator in patent document 1 has a rectangular parallelepiped shape with the X direction as its longitudinal direction, and vibrates the movable body in the X direction relative to the support. The support has a holder that holds the coil of the magnetic drive circuit. Two coils are held side by side in the X direction by a plate-shaped coil holder with the X direction as its longitudinal direction.

The movable body includes a yoke that holds the magnet of the magnetic drive circuit. The yoke includes a first plate portion that faces the coil from one side in the Z direction, a second plate portion that faces the coil from the other side in the Z direction, and a first connecting plate portion and a second connecting plate portion that extend in the Z direction on both sides of the coil in the X direction and connect the first plate portion and the second plate portion. The holder is provided with a first opening for arranging the first connecting plate portion and a second opening for arranging the second connecting plate portion on both sides of the coil in the X direction.

A wiring board to which the coil wire is connected is fixed to the Y-direction side of the coil holder. The first and second connecting plate parts of the yoke do not interfere with the coil wire drawn out in the Y direction from the coil. In addition, each coil is elliptical with the Y direction as its longitudinal direction, and the coil wire is drawn out in the Y direction, so the length of the coil wire draw out is short.

JP 2019-013094 A

In the actuator of Patent Document 1, if the amplitude of the movable body is increased, there is a risk that the first and second connecting plate parts arranged at both ends of the vibration direction (X direction) of the yoke will collide with the holder. Therefore, it is difficult to increase the amplitude. Furthermore, if the plate thickness of the yoke is increased to increase the weight of the movable body, the plate thickness of the first and second connecting plate parts also increases, narrowing the gap in the X direction between the first and second connecting plate parts and the holder, and there is a risk that the first and second connecting plate parts will collide with the holder. Therefore, it is difficult to increase the weight of the movable body.

Here, if the first and second connecting plate parts of the yoke are arranged on both sides of the coil in the direction intersecting the vibration direction (Y direction), the risk of the first and second connecting plate parts colliding with the holder does not increase even if the amplitude of the movable body is increased. However, with such an arrangement, the coil wire drawn out from the coil in the Y direction interferes with the first or second connecting plate part. If the coil wire is drawn out in a direction different from the Y direction, the length of the coil wire drawn out line becomes longer and the route for drawing the coil wire becomes more complicated.

In view of the above problems, the object of the present invention is to provide an actuator that vibrates a movable body using a magnetic drive circuit, which allows for an increase in the amplitude of the movable body and an increase in the weight of the movable body, while preventing an increase in the length of the coil wire lead-out wire and preventing the path for routing the coil wire from becoming complicated.

In order to solve the above problem, the actuator of the present invention has a support and a movable body, a connecting body connected to the movable body and the support and having at least one of elasticity and viscoelasticity, and a magnetic drive circuit that moves the movable body relative to the support, the magnetic drive circuit includes a coil provided on the support and a magnet provided on the movable body facing the coil in a first direction, and drives the movable body in a second direction that intersects with the first direction, the support includes a coil holding part that holds the coils in a line in the second direction, the movable body includes a yoke to which the magnets are fixed, the yoke includes a first plate part facing the coil holding part on one side of the first direction, a second plate part facing the coil holding part on the other side of the first direction, and a pair of connecting plate parts that are arranged on both sides of the coil holding part in a third direction that intersects with the first direction and the second direction and connect the first plate part and the second plate part, and one of the pair of connecting plate parts has an opening through which a lead wire drawn from the coil in the third direction passes.

According to the present invention, the connecting plate portion of the yoke does not face the coil holding portion in the vibration direction of the movable body, but faces the coil holding portion in a direction intersecting the vibration direction. Therefore, even if the amplitude of the movable body is increased or the plate thickness of the yoke is increased, the coil holding portion and the connecting plate portion do not collide. Therefore, it is possible to increase the amplitude of the movable body. In addition, the plate thickness of the yoke can be increased to increase the weight of the movable body, so that strong vibrations can be generated. Furthermore, an opening through which the pull-out wire of the coil wire passes is provided in the connecting plate portion, so that the coil wire can be pulled out in a direction intersecting the vibration direction. This makes it possible to suppress an increase in the length of the pull-out wire of the coil wire and a complicated route for pulling the pull-out wire.

In the present invention, it is preferable that the support body includes a guide portion that protrudes from the coil holding portion in the third direction and is disposed in the opening, and the pull-out wire is disposed in a guide groove provided in the guide portion. In this way, the pull-out wire can be protected. In addition, the pull-out wire can be easily routed.

In the present invention, the coil includes a first coil and a second coil aligned in the second direction, the guide portion is provided at two locations, one side of the first coil in the third direction and one side of the second coil in the third direction, and the two guide portions aligned in the second direction are preferably disposed in the opening. In this way, the pull-out wires can be pulled out from each coil in a linear path. Therefore, the length of the pull-out wires can be shortened. Also, the path along which the pull-out wires are routed can be simplified.

In the present invention, the coil includes a first coil and a second coil aligned in the second direction, the guide portion is provided in one location, and the lead wire drawn from the first coil and the lead wire drawn from the second coil are preferably arranged in the guide groove provided in the one guide portion. In this way, by consolidating the guide portions in one location, the opening area of the opening provided in the yoke can be reduced. Therefore, the weight reduction of the yoke due to the provision of the opening can be suppressed, and the weight of the movable body can be secured.

In the present invention, the support includes a coil holder including the coil holding portion, a first case member including a first end plate portion facing the first plate portion on one side in the first direction and a first side plate portion extending from an outer periphery of the first end plate portion to the other side in the first direction, and a second case member including a second end plate portion facing the second plate portion on the other side in the first direction and a second side plate portion extending from an outer periphery of the second end plate portion to the one side in the first direction, and the guide portion is preferably disposed in a gap between the first side plate portion and the second side plate portion on one side in the third direction of the coil holding portion. In this way, it is possible to draw out the lead wire to the outside of the support. Also, when a wiring board is fixed to the first side plate portion or the second side plate portion, it is easy to draw the lead wire to the wiring board.

In the present invention, the connector comprises a first connector connecting the first plate portion and the first end plate portion, and a second connector connecting the second plate portion and the second end plate portion, and it is preferable that the first connector and the second connector are viscoelastic bodies. In this way, when the movable body vibrates in the second direction, the viscoelastic body vibrates in the shear direction. When deforming in the shear direction, the viscoelastic body has deformation characteristics in which the linear component is greater than the nonlinear component, and therefore the reproducibility of the vibration acceleration in response to the input signal is high. Therefore, it is possible to realize vibrations with subtle nuances.

In the present invention, the magnet comprises a first magnet facing the coil on one side in the first direction, and a second magnet facing the coil on the other side in the first direction, and it is preferable that the first magnet is held by the first plate portion, and the second magnet is held by the second plate portion. In this way, by arranging magnets on both sides of the coil, a large Lorentz force can be generated. Therefore, strong vibrations can be generated.

According to the present invention, the connecting plate portion of the yoke does not face the coil holding portion in the vibration direction of the movable body, but faces the coil holding portion in a direction intersecting the vibration direction. Therefore, even if the amplitude of the movable body is increased or the plate thickness of the yoke is increased, the coil holding portion and the connecting plate portion do not collide. Therefore, it is possible to increase the amplitude of the movable body. In addition, the plate thickness of the yoke can be increased to increase the weight of the movable body, so that strong vibrations can be generated. Furthermore, an opening through which the pull-out wire of the coil wire passes is provided in the connecting plate portion, so that the coil wire can be pulled out in a direction intersecting the vibration direction. This makes it possible to suppress an increase in the length of the pull-out wire of the coil wire and a complicated route for pulling the pull-out wire.

FIG. 2 is an external perspective view of the actuator of the first embodiment. 2 is an XZ cross-sectional view of the actuator of the first embodiment. FIG. 3 is a YZ cross-sectional view of the actuator of the first embodiment. FIG. FIG. 2 is an exploded perspective view of the actuator of the first embodiment as viewed from the Z2 direction. FIG. 2 is an exploded perspective view of the actuator of the first embodiment as viewed from the Z1 direction. FIG. 11 is an external perspective view of an actuator according to a second embodiment. FIG. 11 is an exploded perspective view of the actuator of the second embodiment as viewed from the Z2 direction.

Below, an embodiment of the actuator according to the present invention will be described with reference to the drawings. In the following description, the three mutually intersecting directions will be described as the first direction Z, the second direction X, and the third direction Y. In addition, X1 will be attached to one side of the second direction X, X2 will be attached to the other side of the second direction X, Y1 will be attached to one side of the third direction Y, Y2 will be attached to the other side of the third direction Y, Z1 will be attached to one side of the first direction Z, and Z2 will be attached to the other side of the first direction Z. In this embodiment, the first direction Z, the second direction X, and the third direction Y are mutually perpendicular directions. The second direction X is the vibration direction of the movable body 3.

(Embodiment 1)
Fig. 1 is a perspective view of the actuator 1 of the first embodiment. Fig. 2 is an XZ cross-sectional view of the actuator 1 of the first embodiment. Fig. 3 is a YZ cross-sectional view of the actuator 1 of the first embodiment. Fig. 4 is an exploded perspective view of the actuator 1 of the first embodiment as viewed from the Z2 direction. Fig. 5 is an exploded perspective view of the actuator 1 of the first embodiment as viewed from the Z1 direction.

As shown in FIG. 1, the actuator 1 has a rectangular parallelepiped shape with the dimension in the second direction X being greater than the dimensions in the third direction Y and the first direction Z. The actuator 1 has a support 2, a movable body 3, a magnetic drive circuit 4, and a wiring board 5. The magnetic drive circuit 4 has a coil 6 and a magnet 7 that face the first direction Z, and vibrates the movable body 3 in the second direction X. The coil 6 is connected to the wiring board 5 that is fixed to the side of the support 2. The actuator 1 also has a connector 9 that is connected to the support 2 and the movable body 3. The movable body 3 is supported by the support 2 via the connector 9.

The actuator 1 notifies a user of information through the body of a person using the actuator 1 or an apparatus to which the actuator 1 is attached by vibrating the movable body 3 in the second direction X. The actuator 1 can be incorporated into, for example, an operating member of a game machine, an operating panel, a steering wheel of an automobile, or a chair, and can be used as a haptic device that gives a haptic sensation to a user by the vibration of the movable body 3 in the second direction X. When the actuator 1 is used as a haptic device, for example, by adjusting the AC waveform applied to the coil 6 to make the acceleration at which the movable body 3 moves to one side X1 of the second direction X different from the acceleration at which the movable body 3 moves to the other side X2 of the second direction, the user can experience a vibration that has a directionality in the second direction X.

As described below, the actuator 1 uses a gel-like material (viscoelastic material) as the connector 9. The present invention can also be applied to actuators that use rubber, leaf springs, or the like as the connector 9.

The support 2 has a first case member 10 and a second case member 20 stacked in order from one side Z1 to the other side Z2 in the first direction Z. A coil holder 30, a movable body 3, and a magnetic drive circuit 4 are arranged between the first case member 10 and the second case member 20. In this embodiment, the first case member 10, the coil holder 30, and the second case member 20 are each made of resin. Note that the first case member 10 and the second case member 20 may also be made of metal.

The coil holder 30 has a plate-shaped coil holding portion 31 and edge portions 32 provided at both ends of the coil holding portion 31 in the second direction X. The coil holding portion 31 has a smaller width in the third direction Y than the edge portions 32. The coil holding portion 31 has two coil arrangement holes 33 arranged side by side in the second direction X. The coil holding portion 31 also has two thin plate-shaped guide portions 34 that protrude in the Y1 direction. Each guide portion 34 is provided in the Y1 direction of the coil arrangement holes 33.

The coil holding portion 31 and the guide portion 34 have guide grooves 35 on their Z2-direction surfaces for arranging two lead wires 60 drawn from each coil 6. In this embodiment, two guide grooves 35 extend parallel to the third direction Y from each coil arrangement hole 33 toward the tip of the guide portion 34.

The magnetic drive circuit 4 includes two coils 6, a first coil 61 and a second coil 62. The coil 6 is an oval-shaped air-core coil whose effective side extends in the third direction Y, and a lead wire 60 is pulled out to one side Y1 in the third direction Y. The first coil 61 and the second coil 62 are arranged in the coil arrangement hole 33 of the coil holding portion 31. The first coil 61 and the second coil 62 are fixed to the coil holding portion 31 with an adhesive.

The magnet 7 faces the effective sides of the coil 6 in the first direction Z. The magnet 7 includes two first magnets 71, 72 facing the effective sides of the first coil 61 and the second coil 62 from the Z1 direction, and two second magnets 73, 74 facing the effective sides of the first coil 61 and the second coil 62 from the Z2 direction. The first magnets 71, 72 and the second magnets 73, 74 are polarized and magnetized in the third direction Y.

The first coil 61 and the second coil 62 are the same coil. Furthermore, the first magnets 71, 72 and the second magnets 73, 74 are all the same magnet. Therefore, the magnetic drive circuit 4 is composed of one type of coil and one type of magnet, and the number of types of parts is small.

As shown in Figures 4 and 5, the first case member 10 has a first end plate portion 11 facing the coil holding portion 31 from the Z1 direction, and a first side plate portion 12 extending in the Z2 direction from the outer peripheral edge of the first end plate portion 11. The second case member 20 has a second end plate portion 21 facing the coil holding portion 31 from the Z2 direction, and a second side plate portion 22 extending in the Z1 direction from the outer peripheral edge of the second end plate portion 21. The second side plate portion 22 has a constant height in the first direction Z.

The first side plate portion 12 of the first case member 10 has a first wall 13 and a second wall 14 facing in the third direction Y, and a third wall 15 and a fourth wall 16 facing in the second direction X. The height of the first wall 13 and the second wall 14 in the first direction Z is higher than the height of the third wall 15 and the fourth wall 16 in the first direction Z. At both ends of the first wall 13 and the second wall 14 in the second direction X, there are step portions 17 cut out in the Z1 direction to the same height as the third wall 15 and the fourth wall 16.

When assembling the support 2, as shown in Figures 1, 2, and 3, the first case member 10, the coil holder 30, and the second case member 20 are assembled and joined in a state where they are stacked in the first direction Z. At this time, the edge portion 32 of the coil holder 30 is fitted into the step portion 17 of the first side plate portion 12. The coil holding portion 31 is disposed inside the first wall 13 and the second wall 14. The first case member 10, the coil holder 30, and the second case member 20 are joined by, for example, an adhesive. Alternatively, a structure may be adopted in which the first case member 10, the coil holder 30, and the second case member 20 are held inside a cylindrical cover (not shown).

As shown in Figures 1 and 3, when the first case member 10, the coil holder 30, and the second case member 20 are assembled, a gap S in the first direction Z is formed between the tip of the first wall 13 of the first case member 10 and the tip of the second side plate portion 22 of the second case member 20. The wiring board 5 fixed to the recess 18 of the first wall 13 is located in the Z1 direction of the gap S. The tip of the guide portion 34 protruding in the Y1 direction from the coil holding portion 31 is inserted into the gap S. The lead wire 60 drawn from the coil 6 is bent in the Z1 direction at the tip of the guide portion 34, drawn around to the land 50 provided on the surface of the wiring board 5, and then connected to the land 50 by soldering.

The movable body 3 includes a yoke 80 that holds the magnet 7. As shown in Figs. 2, 3, 4, and 5, the yoke 80 includes a first plate portion 81 that faces the coil holding portion 31 from the Z1 direction, a second plate portion 82 that faces the coil holding portion 31 from the Z2 direction, and a pair of connecting plate portions 83, 84 that extend in the first direction Z on both sides of the coil holding portion 31 in the third direction Y to connect the first plate portion 81 and the second plate portion 82. The first magnets 71, 72 are fixed to the surface of the first plate portion 81 in the Z2 direction, lined up in the second direction X. The second magnets 73, 74 are fixed to the surface of the second plate portion 82 in the Z1 direction, lined up in the second direction X. The first magnets 71, 72 and the second magnets 73, 74 are fixed to the yoke 80 by a method such as adhesion.

In this embodiment, the yoke 80 is manufactured by joining two parts: a first yoke 85 including a first plate portion 81 and a pair of connecting plate portions 83, 84 bent in the Z2 direction from both ends of the first plate portion 81 in the third direction Y, and a second yoke 86 consisting of a second plate portion 82. The Z2 direction ends of the pair of connecting plate portions 83, 84 are connected to both ends of the second plate portion 82 in the third direction Y by welding.

The yoke 80 has an opening 87 that penetrates the connecting plate portion 83 in the Y1 direction. The opening 87 is formed between a notch formed by cutting the tip of the connecting plate portion 83 in the Z1 direction and the Y1-direction edge of the second plate portion 82. As shown in FIG. 2, the guide portion 34 that protrudes in the Y1 direction from the coil holding portion 31 penetrates the opening 87 and extends to the gap S that opens into the side surface of the support body 2 in the Y1 direction.

In this embodiment, the magnets 7 are arranged on both sides of the coil 6 in the first direction Z, but the magnetic drive circuit 4 may be configured to arrange the magnets 7 only on one side of the coil 6 in the Z1 direction and the Z2 direction.

(Connector)
As shown in FIG. 2, the connection body 9 is disposed at a position where the support body 2 and the movable body 3 face each other in the first direction Z. The movable body 3 is supported by the connection body 9 so as to be movable in the second direction X. In this embodiment, the connection body 9 includes first connection bodies 91 and 92 disposed at a position where the first yoke 85 and the first case member 10 face each other in the first direction Z, and second connection bodies 93 and 94 disposed at a position where the second yoke 86 and the second case member 20 face each other in the first direction Z. The first connection bodies 91 and 92 are compressed in the first direction Z between the first plate portion 81 of the yoke 80 and the first end plate portion 11 of the first case member 10. The second connection bodies 93 and 94 are compressed in the first direction Z between the second plate portion 82 of the yoke 80 and the second end plate portion 21 of the second case member 20.

The connector 9 has at least one of elasticity and viscoelasticity. In this embodiment, the connector 9 is a viscoelastic body. For example, the connector 9 (viscoelastic body) is a silicone-based gel with a penetration of 10 degrees to 110 degrees. The penetration is defined in JIS-K-2207 and JIS-K-2220, and the smaller this value, the harder the material is. In addition, as the connector 9 having viscoelasticity, 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.

The connecting body 9 has linear or nonlinear elasticity characteristics depending on the direction of expansion and contraction. For example, when the connecting body 9 is pressed in its thickness direction (axial direction) and compressed, it has elasticity characteristics in which the nonlinear component (spring constant) is greater than the linear component (spring constant). In contrast, when it is stretched by being pulled in the thickness direction (axial direction), it has elasticity characteristics in which the linear component (spring constant) is greater than the nonlinear component (spring constant). Also, when the connecting body 9 deforms in a direction (shear direction) that intersects the thickness direction (axial direction), it has deformation characteristics in which the linear component (spring constant) is greater than the nonlinear component (spring constant) regardless of the direction of movement, because the deformation is in the direction of being stretched by being pulled.

When the movable body 3 vibrates in the second direction X, the connecting body 9 deforms in the shear direction. Therefore, when the movable body 3 vibrates in the second direction X, the connecting body 9 uses a spring element in the shear direction, which improves the reproducibility of the vibration acceleration in response to the input signal, thereby achieving vibration with subtle nuances.

(Main effects of this embodiment)
As described above, the actuator 1 of the first embodiment includes the support 2, the movable body 3, the connector 9 connected to the movable body 3 and the support 2 and having at least one of elasticity and viscoelasticity, and the magnetic drive circuit 4 for moving the movable body 3 relatively to the support 2. The magnetic drive circuit 4 includes a coil 6 provided on the support 2 and a magnet 7 provided on the movable body 3 facing the coil 6 in the first direction Z, and drives the movable body 3 in the second direction X. The support 2 includes a coil holder 31 in which a plurality of coils 6 are held in a row in the second direction X. The movable body 3 includes a yoke 80 to which the magnet 7 is fixed. The yoke 80 includes a first plate portion 81 facing the coil holding portion 31 in the Z1 direction (one side in the first direction), a second plate portion 82 facing the coil holding portion 31 in the Z2 direction (the other side in the first direction), and a pair of connecting plate portions 83, 84 arranged on both sides of the coil holding portion 31 in the third direction Y and connecting the first plate portion 81 and the second plate portion 82. The connecting plate portion 83 is provided with an opening 87 through which the lead wire 60 drawn from the coil 6 in the Y1 direction passes.

In the actuator 1 of the first embodiment, the connecting plate parts 83 and 84 of the yoke 80 do not face the coil holding part 31 in the vibration direction (second direction X) of the movable body 3, but face the coil holding part 31 in a direction intersecting the vibration direction (third direction Y). Therefore, even if the amplitude of the movable body 3 is increased or the plate thickness of the yoke 80 is increased, the coil holding part 31 and the connecting plate parts 83 and 84 do not collide. Therefore, it is possible to increase the amplitude of the movable body 3. Also, even if the plate thickness of the yoke 80 is increased, the coil holding part 31 and the connecting plate parts 83 and 84 do not collide. Therefore, it is possible to increase the weight of the movable body 3 and generate strong vibrations.

Furthermore, in the actuator 1 of the first embodiment, an opening 87 through which the coil wire lead-out wire 60 passes is provided in the connecting plate portion 83, so that the coil wire can be led out in a direction intersecting the vibration direction (third direction Y). This allows the lead-out wire 60 to be led out from the longitudinal end of the elliptical coil 6, so that an increase in the length of the coil wire lead-out wire 60 and a complicated route for running the lead-out wire 60 can be suppressed.

In the first embodiment, the support 2 includes a guide portion 34 that protrudes from the coil holding portion 31 in the third direction Y and is disposed in the opening 87. The draw-out wire 60 is disposed in a guide groove 35 provided in the guide portion 34. In this manner, the draw-out wire 60 can be protected by disposing the draw-out wire 60 in the guide groove 35 and drawing it around. Furthermore, by drawing the draw-out wire 60 along the guide groove 35, it can be easily drawn around a predetermined path.

In the first embodiment, the coil 6 includes a first coil 61 and a second coil 62 aligned in the second direction X, and the guide portion 34 is provided at two locations, on the Y1 direction of the first coil 61 (one side of the third direction) and on the Y1 direction of the second coil. The opening 87 is large enough to accommodate two guide portions 34. By providing guide portions 34 corresponding to each coil 6 in this way, the lead wires 60 can be drawn from each coil 6 in a linear path. This allows the length of the lead wires 60 to be shortened. In addition, the path along which the lead wires 60 are drawn can be simplified.

In the first embodiment, the support 2 has a coil holder 30 having a coil holding portion 31, a first case member 10 having a first end plate portion 11 facing the first plate portion 81 in the Z1 direction (one side of the first direction) and a first side plate portion 12 extending from the outer periphery of the first end plate portion 11 in the Z2 direction (the other side of the first direction), and a second case member 20 having a second end plate portion 21 facing the second plate portion 82 in the Z2 direction and a second side plate portion 22 extending from the outer periphery of the second end plate portion 21 in the Z1 direction. The guide portion 34 is disposed in the gap between the first side plate portion 12 and the second side plate portion 22 in the Y1 direction (one side of the third direction) of the coil holding portion 31. In this way, a gap S into which the tip of the guide portion 34 can be inserted is provided between the first case member 10 and the second case member 20, thereby ensuring a path for drawing the lead wire 60 to the outside of the support 2. In addition, the lead wire 60 can be drawn out to the side of the support 2, so that the lead wire 60 can be easily connected to the wiring board 5 fixed to the side of the support 2.

In the first embodiment, the connector 9 includes first connectors 91, 92 that connect the first plate 81 and the first end plate 11, and second connectors 93, 94 that connect the second plate 82 and the second end plate 21. The first connectors 91, 92 and the second connectors 93, 94 are viscoelastic bodies. With this arrangement, when the movable body 3 vibrates in the second direction X, the viscoelastic body vibrates in the shear direction and deforms with deformation characteristics in which the linear component is larger than the nonlinear component. Therefore, an actuator 1 with high reproducibility of vibration acceleration with respect to an input signal can be obtained, and vibration with subtle nuances can be realized.

In the first embodiment, the magnet 7 includes first magnets 71, 72 that face the coil 6 in the Z1 direction (one side of the first direction), and second magnets 73, 74 that face the coil 6 in the Z2 direction (the other side of the first direction). The first magnets 71, 72 are held by a first plate portion 81, and the second magnets 73, 74 are held by a second plate portion 82. In this way, by arranging the magnets 7 on both sides of the coil 6 in the first direction Z, a large Lorentz force can be generated, and strong vibrations can be generated.

(Embodiment 2)
Fig. 6 is a perspective view of the actuator 1A of embodiment 2. Fig. 2 is an exploded perspective view of the actuator 1A of embodiment 2 as seen from the Z2 direction. Below, the same components as those in embodiment 1 are denoted by the same reference numerals and their description will be omitted, and components different from embodiment 1 will be described.

The coil holder 30 of the first embodiment is provided with two guide portions 34 corresponding to the number of coils 6, whereas the coil holder 30A of the second embodiment is provided with only one guide portion 34A (see FIG. 7). The guide portion 34A is disposed at a position midway between the first coil 61 and the second coil 62 in the second direction X. A guide groove 35A is provided on the Z2-direction surfaces of the coil holding portion 31 and the guide portion 34A.

The coil holder 30A of the second embodiment is provided with one guide groove 35A in which a coil wire is disposed that connects the first coil 61 and the second coil 62 in series, one guide groove 35A extending from the first coil 61 to the tip of the guide part 34 in the Y1 direction, and one guide groove 35A extending from the second coil 62 to the tip of the guide part 34 in the Y1 direction.

The yoke 80A of the second embodiment has one guide portion 34A arranged in the opening 87A that penetrates the connecting plate portion 83. Therefore, the opening width of the opening 87A in the second direction X is shorter than the opening width of the opening 87 in the second direction X of the opening 87 of the first embodiment. The guide portion 34A passes through the opening 87A and protrudes in the Y1 direction of the connecting plate portion 83, and is inserted into the gap S between the tip of the first wall 13 of the first case member 10 and the tip of the second side plate portion 22 of the second case member 20. One lead wire 60 drawn from the first coil 61 and one lead wire 60 drawn from the second coil 62 are bent in the Z1 direction at the tip of the guide portion 34A, drawn to the land 50A provided on the surface of the wiring board 5, and then connected to the land 50A by soldering.

(Main Effects of the Second Embodiment)
In the second embodiment, similarly to the first embodiment, the connecting plate portions 83 and 84 of the yoke 80 face the coil holding portion 31 in a direction intersecting the vibration direction of the movable body 3. Therefore, even if the amplitude of the movable body 3 is increased, the yoke 80 does not collide with the support body 2. Furthermore, even if the plate thickness of the yoke 80 is increased, the yoke 80 does not collide with the support body 2. Therefore, similarly to the first embodiment, the amplitude of the movable body 3 can be increased. Furthermore, the weight of the movable body 3 can be increased to generate strong vibrations.

In the second embodiment, similarly to the first embodiment, the opening 87A through which the lead wire 60 of the coil wire passes is provided in the connecting plate portion 83, so that the coil wire can be drawn out in a direction intersecting the vibration direction of the movable body 3. Therefore, similarly to the first embodiment, it is possible to suppress an increase in the length of the lead wire 60 of the coil wire and a complication of the path for drawing the lead wire 60.

In the second embodiment, the coil 6 includes a first coil 61 and a second coil 62 arranged in the second direction X. The coil holder 30A has a guide portion 34A at one location. The lead wire 60 drawn from the first coil 61 and the lead wire 60 drawn from the second coil 62 are both arranged in a guide groove 35A provided in the common guide portion 34A. In this way, by consolidating the guide portions 34A at one location, the length of the opening 87A in the second direction X can be shortened. This allows the opening area of the opening 87A provided in the yoke 80A to be reduced. Therefore, the weight reduction of the yoke 80A due to the provision of the opening 87A can be suppressed, and the weight of the movable body 3 can be secured.

1, 1A...actuator, 2...support, 3...movable body, 4...magnetic drive circuit, 5...wiring board, 6...coil, 7...magnet, 9...connector, 10...first case member, 11...first end plate portion, 12...first side plate portion, 13...first wall, 14...second wall, 15...third wall, 16...fourth wall, 17...step portion, 18...recess, 20...second case member, 21...second end plate portion, 22...second side plate portion, 30, 30A...coil holder, 31...coil holding portion, 32...edge portion, 33...coil arrangement hole, 34 , 34A...guide portion, 35, 35A...guide groove, 50, 50A...land, 60...drawing wire, 61...first coil, 62...second coil, 71, 72...first magnet, 73, 74...second magnet, 80, 80A...yoke, 81...first plate portion, 82...second plate portion, 83, 84...connecting plate portion, 85...first yoke, 86...second yoke, 87, 87A...opening, 91, 92...first connector, 93, 94...second connector, S...gap, X...second direction, Y...third direction, Z...first direction

Claims (7)

A support and a movable body;
a connector connected to the movable body and the support body and having at least one of elasticity and viscoelasticity;
a magnetic drive circuit for moving the movable body relative to the support body,
the magnetic drive circuit includes a coil provided on the support and a magnet provided on the movable body and facing the coil in a first direction, and drives the movable body in a second direction intersecting the first direction;
the support body includes a coil holding portion that holds the coils in a row in the second direction,
the movable body includes a yoke to which the magnet is fixed, the yoke including a first plate portion facing the coil holding portion on one side in the first direction, a second plate portion facing the coil holding portion on the other side in the first direction, and a pair of connecting plate portions arranged on both sides of the coil holding portion in a third direction that intersects with the first direction and the second direction, and connecting the first plate portion and the second plate portion;
An actuator, characterized in that one of the pair of connecting plate portions is provided with an opening through which a lead wire drawn from the coil in the third direction passes. the support body includes a guide portion that protrudes from the coil holding portion in the third direction and is disposed in the opening,
2. The actuator according to claim 1, wherein the lead wire is disposed in a guide groove provided in the guide portion. the coils include a first coil and a second coil aligned in the second direction,
the guide portion is provided at two locations, one side of the first coil in the third direction and one side of the second coil in the third direction,
The actuator according to claim 2 , wherein the guide portions are arranged in two locations in the opening so as to be aligned in the second direction. the coils include a first coil and a second coil aligned in the second direction,
The guide portion is provided at one location,
The actuator according to claim 2, characterized in that the lead wire drawn from the first coil and the lead wire drawn from the second coil are arranged in the guide groove provided in the one guide portion. The support is
a coil holder including the coil holding portion;
a first case member including a first end plate portion facing the first plate portion on one side in the first direction, and a first side plate portion extending from an outer circumferential edge of the first end plate portion to the other side in the first direction;
a second case member including a second end plate portion facing the second plate portion on the other side in the first direction, and a second side plate portion extending from an outer circumferential edge of the second end plate portion to one side in the first direction,
The actuator according to claim 1 , wherein the guide portion is disposed in a gap between the first side plate portion and the second side plate portion on one side of the coil holding portion in the third direction. The connector is
a first connector that connects the first plate portion and the first end plate portion;
a second connector that connects the second plate portion and the second end plate portion,
6. The actuator according to claim 5, wherein the first connector and the second connector are made of a viscoelastic material. the magnet includes a first magnet facing the coil on one side in the first direction, and a second magnet facing the coil on the other side in the first direction,
The first magnet is held by the first plate portion,
The actuator according to claim 1 , wherein the second magnet is held by the second plate portion.

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