Actuator

Abstract

To reduce the risk of disconnection and short circuit of a coil wire connecting a coil in a magnetic drive circuit and a wiring board and suppress increase in the number of components and assembly man-hours.SOLUTION: A non-magnetic plate 40, which overlaps with a plate part 33 provided with a first coil arrangement hole 31 and a second coil arrangement hole 32 from a Z1 direction, is attached to a coil holder 30 of an actuator 1. A first coil 61 arranged in the first coil arrangement hole 31 and a second coil 62 arranged in the second coil arrangement hole 32 each have a surface directing in a Z2 direction are exposed to a space between the plate part 33 and a second plate part 82. A winding-start side coil 64 led out from the center of the first coil 61 and the center of the second coil 62 is installed through a gap S between the first coil 61 and the second coil 62 and the plate 40 to a wiring board 5.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] 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 support includes a coil holder that holds a coil of the magnetic drive circuit. The coil holder includes a plate portion with coil arrangement holes in two locations. The coil that is arranged in the coil arrangement hole is covered by a first plate that overlaps the plate portion from one side, and a second plate that overlaps the plate portion from the other side. The movable body includes a yoke assembled to surround the plate portion. A first magnet that faces the coil from one side via the first plate, and a second magnet that faces the coil from the other side via the second plate are fixed to the yoke.

[0003] A coil wire (not shown) is drawn out from the coil of the magnetic drive circuit and connected to a wiring board fixed to the side of the coil holder. In Patent Document 1, the coil wire is covered by a first plate and a second plate attached to the coil holder. Therefore, even when vibrations occur during operation of the actuator or when the actuator is dropped, the coil wire is prevented from coming into contact with the magnet and causing a break or short circuit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-195934 A Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the number of parts increases due to the first and second plates attached to the coil holder. However, the coil wire that is routed so as to overlap the top surface of the coil will float above the top surface of the coil if the plates are not attached. In that case, there is a risk that the coil wire will come into contact with the magnet and cause a break or short circuit. The floating can be prevented by gluing the coil wire to the top surface of the coil, but this increases the number of assembly steps.

[0006] In view of the above problems, an object of the present invention is to reduce the risk of breakage or short circuit of the coil wire connecting the coil and the wiring board, and to suppress an increase in the number of parts and an increase in the number of assembly steps. [Means for solving the problem]

[0007] In order to solve the above problem, an actuator according to the present invention has a support and a movable body, a connecting body connected to the support and the movable body and having at least one of elasticity and viscoelasticity, and a magnetic drive circuit for moving the movable body relatively to the support, the magnetic drive circuit having 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 with the first direction, the support has a coil holder having a plate portion provided with a coil arrangement hole, a non-magnetic plate overlapping the plate portion from one side in the first direction, and a wiring board fixed to a side surface of the coil holder, the movable body has a yoke for holding the magnet, the yoke having a first plate portion located on one side of the plate in the first direction, a second plate portion located on the other side of the plate portion in the first direction, and a pair of connecting plate portions connecting both ends of the first plate portion and the second plate portion, and the magnetic drive circuit has a coil provided on the support and a magnet provided on the movable body and facing the coil in a first direction, the magnetic drive circuit driving the movable body in a second direction intersecting with the first direction, the support has a coil holder having a plate portion provided with a coil arrangement hole, a non-magnetic plate overlapping the plate portion from one side in the first direction, and a wiring board fixed to a side surface of the coil holder, the movable body has a yoke for holding the magnet, the yoke having a first plate portion located on one side of the plate in the first direction, a second plate portion located on the other side of the plate portion in the first direction, and a pair of connecting plate portions connecting both ends of the first plate portion and the second plate portion, The magnet is fixed, the other side of the coil in the first direction is exposed in the space between the plate portion and the second plate portion, and the coil wire drawn from the center of the coil passes through the gap between the coil and the plate and is routed to the wiring board.

[0008] According to the present invention, only one surface of the coil holder in the first direction is covered with a non-magnetic plate, and the coil wire is routed so as to pass through the gap between the plate and the coil. In this way, even when vibration during operation or a drop impact is applied, the coil wire can be prevented from coming into contact with a magnet or a yoke, causing a break or a short circuit. In addition, since the plate only needs to be attached in one place, the number of plates can be minimized. Therefore, an increase in the number of parts can be suppressed. Furthermore, since there is no need to perform a process of gluing and fixing the coil wire to the coil to prevent the coil wire from floating, an increase in the number of assembly steps can be suppressed.

[0009] In the present invention, it is preferable that the magnetic drive circuit includes two of the coils aligned in the second direction, the plate portion is provided with two of the coil arrangement holes aligned in the second direction, and a coil wire drawn from the center of one of the coils passes through a gap between the coil and the plate and is connected to the other coil. In this way, the coil wire (crossover wire) connecting the two coils can be covered by the plate, preventing the crossover wire from coming into contact with a magnet and causing a break or short circuit.

[0010] In the present invention, it is preferable that the coil is fixed to the plate by adhesive. In this way, during assembly, the coil can be positioned and fixed to the plate in advance, and then the plate can be attached to the coil holder. This improves the positional accuracy of the coil in the magnetic drive circuit.

[0011] In the present invention, it is preferable that the depth of the coil arrangement hole in the first direction is greater than the thickness of the coil in the first direction. In this way, the surface of the coil on the other side in the first direction (i.e., the surface on the side exposed and not covered by the plate) can be assembled in a state in which it is recessed from the surface of the plate part of the coil holder. Therefore, even when vibrations during operation or a drop impact are applied, it is possible to prevent the coil from coming into contact with the magnet and causing a break or short circuit.

[0012] In the present invention, it is preferable that the coil wire passed through the gap between the coil and the plate is drawn out along the outer peripheral surface of the coil to the surface on the other side in the first direction of the plate portion, accommodated in a wiring groove provided in the plate portion, and routed to the wiring board. In this way, the coil wire can be routed via the surface on the side not covered by the plate, making it easy to connect to the wiring board. In addition, when the coil wire is routed to the surface on the side not covered by the plate, the coil wire can be accommodated in the wiring groove, so that it is possible to prevent the coil wire from coming into contact with a magnet or a yoke and causing a break or short circuit.

[0013] In the present invention, it is preferable that the coil holder is provided with a pair of openings penetrating both sides of the coil arrangement hole in the second direction, the pair of connecting plate parts are arranged in the pair of openings, the wiring board is arranged on one side surface of the coil holder in the second direction, and the wiring groove passes through both sides of the opening located on one side in the second direction and extends to the wiring board. In this way, when the coil wire is routed to the wiring board arranged on the longitudinal side surface of the support, it is possible to prevent the coil wire from coming into contact with a magnet or a yoke, causing a break or a short circuit.

[0014] In the present invention, the support includes a first case member overlapping the coil holder from one side in the first direction and a second case member overlapping the coil holder from the other side in the first direction, and the connecting body is disposed between the first case member and the first plate portion and overlaps the coil holder from the other side in the first direction. It is preferable that the coil holder further includes a first connecting body that is sandwiched between the second case member and the second plate portion while being compressed in the first direction, and a second connecting body that is sandwiched between the second case member and the second plate portion while being compressed in the first direction. In this way, it is not necessary to fix plates to both sides of the coil holder in order to ensure a flat surface for fixing the connecting body inside the yoke. This makes it possible to suppress an increase in the number of parts. Effect of the Invention

[0015] According to the present invention, the portion where the coil wire overlaps the coil is covered with a plate, so that even when vibrations occur during operation or the coil is dropped, the coil wire can be prevented from coming into contact with a magnet or a yoke, causing disconnection or a short circuit. Also, since the plate only needs to be attached in one place, the number of plates can be minimized. Therefore, an increase in the number of parts can be suppressed. Furthermore, since there is no need to perform a process of gluing and fixing the coil to prevent the coil wire from floating, an increase in the number of assembly steps can be suppressed. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view of an appearance of an actuator according to the present invention; [Diagram 2] FIG. 2 is an exploded perspective view of the actuator as viewed from the Z2 direction. [Diagram 3] FIG. 11 is an exploded perspective view of the actuator as viewed from the Z1 direction. [Figure 4] FIG. 2 is an XZ cross-sectional view of the actuator. [Diagram 5] FIG. 2 is a YZ cross-sectional view of the actuator. [Figure 6] FIG. 2 is an exploded perspective view of a coil holder, a plate, a coil, and a wiring board. [Figure 7] FIG. 2 is a perspective view showing the arrangement of coil wires drawn out from two coils. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the actuator 1 according to the present invention will be described with reference to the drawings. In the following description, the three mutually intersecting directions are referred to as a first direction Z, a second direction X, and a third direction Y. Also, one side of the second direction X is referred to as an X1 direction, the other side of the second direction X is referred to as an X2 direction, one side of the third direction Y is referred to as a Y1 direction, the other side of the third direction Y is referred to as a Y2 direction, one side of the first direction Z is referred to as a Z1 direction, and the other side of the first direction Z is referred to as a Z2 direction. In this embodiment, the first direction Z, the second direction X, and the third direction Y are mutually perpendicular directions.

[0018] (Overall composition) FIG. 1 is a perspective view of an actuator 1 according to the present invention. FIG. 2 is an exploded perspective view of the actuator 1 as viewed from the Z2 direction. FIG. 3 is an exploded perspective view of the actuator 1 as viewed from the Z1 direction. FIG. 4 is an XZ cross-sectional view of the actuator 1. FIG. 5 is a YZ cross-sectional view of the actuator 1. FIG. 6 is an exploded perspective view of a coil holder 30, a plate 40, a coil 6, and a wiring board 5. FIG. 7 is a perspective view showing the arrangement of coil wires 60 drawn out from two coils 6.

[0019] As shown in Fig. 1, the actuator 1 has an overall rectangular parallelepiped shape with a dimension in the second direction X greater than the dimensions in the third direction Y and the first direction Z. As shown in Figs. 2, 3 and 4, the actuator 1 includes a support 2, a movable body 3, a magnetic drive circuit 4 and a wiring board 5. The magnetic drive circuit 4 includes a coil 6 and a magnet 7 that face the first direction Z. The magnetic drive circuit 4 vibrates the movable body 3 in the second direction X relative to the support 2. The coil 6 is connected to the wiring board 5 that is fixed to the side surface of the support 2 in the X1 direction.

[0020] The actuator 1 includes a connector 9 connected to the support 2 and the movable body 3. The movable body 3 is supported by the support 2 via the connector 9. As will be described later, the actuator 1 uses a gel-like material (viscoelastic material) as the connector 9.

[0021] The actuator 1 notifies a user who uses 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 used as a haptic device that gives a haptic sensation to a user by vibrating the movable body 3 in the second direction X. The actuator 1 can be used by being incorporated into, for example, an operating member of a game machine, an operating panel, a steering wheel or a chair of an automobile, etc.

[0022] (Support) 1, the support 2 includes a first case member 10, a coil holder 30, and a second case member 20 stacked in a first direction Z. As shown in FIGS. 4 and 5, the movable body 3 and the magnetic drive circuit 4 are disposed 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.

[0023] 2 and 4, the first case member 10 includes a first end plate portion 11 in which two recesses 13 aligned in the second direction X are formed, a first side plate portion 12 extending in the Z2 direction from the outer periphery of the first end plate portion 11, and first boss portions 14 provided at four corners of the first end plate portion 11 and protruding in the Z2 direction. The first boss portions 14 are formed integrally with the first side plate portion 12 and protrude in the Z2 direction beyond the first side plate portion 12.

[0024] 3 and 4, the second case member 20 includes a second end plate portion 21 in which two recesses 23 aligned in the second direction X are formed, a second side plate portion 22 extending in the Z1 direction from the outer periphery of the second end plate portion 21, and second boss portions 24 provided at four corners of the second end plate portion 21 and protruding in the Z1 direction. The second boss portions 24 are formed integrally with the second side plate portion 22. The tip surface of the second boss portion 24 is located at a position recessed in the Z2 direction from the tip of the second side plate portion 22.

[0025] As shown in FIG. 2, FIG. 3, and FIG. 4, the coil holder 30 has a first coil arrangement hole 31 and a second coil arrangement hole 32 arranged side by side in the second direction X. The coil holder 30 includes a plate portion 33 parallel to the XY plane, a third side plate portion 34 extending in the Z1 and Z2 directions from the outer periphery of the plate portion 33, and a third boss portion 35 protruding in the Z1 and Z2 directions from four corners of the plate portion 33. The third boss portion 35 is formed integrally with the third side plate portion 34. In the plate portion 33, a rectangular opening portion 301 is formed in the X1 direction of the first coil arrangement hole 31, and a rectangular opening portion 302 is formed in the X2 direction of the second coil arrangement hole 32. The first coil arrangement hole 31, the second coil arrangement hole 32, the opening portion 301, and the opening portion 302 penetrate the plate portion 33 in the first direction Z.

[0026] As shown in FIG. 1, the first case member 10 is provided with a screw hole 15 that opens on the tip surface of the first boss portion 14. The second case member 20 is provided with a through hole 25 that penetrates the second boss portion 24. The third boss portion 35 is provided with a through hole 36 that overlaps with the screw hole 15 of the first case member 10 and the through hole 25 of the second case member 20. When assembling the support body 2, the first case member 10, the coil holder 30, and the second case member 20 are stacked in the first direction Z, and the four corners are joined by screws. The four screws are passed through the through holes 25 and the through holes 36 from the Z2 direction, respectively, and the tips are screwed into the screw holes 15.

[0027] 3 and 4, the support 2 includes a metal plate 40 that is placed on the plate portion 33 of the coil holder 30 and the coil 6 from the Z1 direction. The support 2 includes a coil set 8 (see FIGS. 2 and 3) in which the coil holder 30, the plate 40, and the coil 6 are assembled. When assembling the coil set 8, an assembly is formed in which two coils 6 are fixed to the plate 40, as described below (see FIG. 6). Thereafter, the plate 40 together with the coil 6 is attached and fixed to the coil holder 30 from the Z1 direction.

[0028] 4 and 6, the plate 40 includes a flat plate body 41 overlapping the plate portion 33 of the coil holder 30 from the Z1 direction, a pair of bent plate portions 42 bent in the Z1 direction from the X1 and X2 direction edges of the plate body 41, and a pair of edge portions 43 bent in the Z2 direction from the Y1 and Y2 direction edges of the plate body 41. As shown in Fig. 4, the pair of edge portions 43 engage with step portions 303 formed on the inner peripheral surface of the opening 301 in the X2 direction and the inner peripheral surface of the opening 302 in the X1 direction.

[0029] (Magnetic drive circuit 4) The magnetic drive circuit 4 includes a first coil 61 and a second coil 62 as the coil 6. As shown in Figs. 2 and 4, the first coil 61 is disposed in the first coil arrangement hole 31. The second coil 62 is disposed in the second coil arrangement hole 32. As shown in Fig. 6, the coil 6 is an elliptical air-core coil having two effective sides 601 extending in the third direction Y. A central hole 602 extending in the third direction Y is provided in the center of the coil 6.

[0030] As shown in FIG. 4, the magnet 7 faces the effective side 601 of the coil 6 in the first direction Z. The magnet 7 includes two first magnets 71 facing the effective side 601 of the first coil 61 and the second coil 62 from the Z1 direction, and two second magnets 72 facing the effective side 601 of the first coil 61 and the second coil 62 from the Z2 direction. The first magnets 71 and the second magnets 72 are polarized and magnetized in the third direction Y. In this embodiment, the first coil 61 and the second coil 62 are the same coil. Also, the first magnets 71 and the second magnets 72 are all the same magnet.

[0031] (movable body) The movable body 3 includes a yoke 80 that holds the magnet 7. As shown in FIG. 4 and FIG. 5, the yoke 80 includes a first plate portion 81 that faces the plate portion 33 of the coil holder 30 from the Z1 direction, a second plate portion 82 that faces the plate portion 33 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 first coil arrangement hole 31 and the second coil arrangement hole 32 in the second direction X to connect the first plate portion 81 and the second plate portion 82. The first magnets 71 are fixed to the surface of the first plate portion 81 in the Z2 direction, aligned in the second direction X. The second magnets 72 are fixed to the surface of the second plate portion 82 in the Z1 direction, aligned in the second direction X. The first magnets 71 and the second magnets 72 are fixed to the yoke 80 by a method such as adhesion.

[0032] 2 and 3, the yoke 80 is manufactured by joining two components: 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 second direction X, and a second yoke 86 including a second plate portion 82. As shown in FIG. 4, the connecting plate portion 83 extends in the Z2 direction through an opening portion 301 of the coil holder 30 in the X1 direction relative to the first coil 61. The connecting plate portion 84 extends in the Z2 direction through an opening portion 302 of the coil holder 30 in the Z2 direction relative to the second coil 62. 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 second direction X by welding.

[0033] (Connector) 4, the connecting 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 connecting body 9 so as to be movable in the second direction X. The connecting body 9 includes a first connecting body 91 disposed at a position where the first yoke 85 and the first case member 10 face each other in the first direction Z, and a second connecting body 92 disposed at a position where the second yoke 86 and the second case member 20 face each other in the first direction Z.

[0034] The first connection body 91 is disposed in a state compressed in the first direction Z between the first plate portion 81 of the first yoke 85 and the bottom surface of the recess 13 of the first case member 10. The two first connection bodies 91 are disposed in parallel in the second direction X. The second connection body 92 is disposed in a state compressed in the first direction Z between the second plate portion 82 of the second yoke 86 and the bottom surface of the recess 23 of the second case member 20. The two second connectors 92 are arranged side by side in the second direction X.

[0035] 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 specified in JIS-K-2207 and JIS-K-2220, and the smaller this value, the harder it 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.

[0036] The connecting body 9 has linear or nonlinear expansion and contraction characteristics depending on the expansion and contraction direction. For example, when the connecting body 9 is pressed in its thickness direction (axial direction) and compressed and deformed, it has an expansion and contraction characteristic in which the nonlinear component (spring constant) is greater than the linear component (spring constant). In contrast, when the connecting body 9 is stretched by being pulled in the thickness direction (axial direction), it has an expansion and contraction characteristic in which the linear component (spring constant) is greater than the nonlinear component (spring constant). Also, when the connecting body 9 is deformed in a direction (shear direction) intersecting the thickness direction (axial direction), regardless of the direction of movement, the deformation is in the direction of being stretched by being pulled, so it has a deformation characteristic in which the linear component (spring constant) is greater than the nonlinear component (spring constant).

[0037] When the movable body 3 vibrates in the second direction X, the connecting body 9 deforms in the shear direction. Therefore, in the connecting body 9, by using a spring element in the shear direction when the movable body 3 vibrates in the second direction X, it is possible to improve the reproducibility of the vibration acceleration for the input signal. Therefore, it is possible to realize vibration with subtle nuances.

[0038] (Coil wire arrangement) The two coils 6 are connected in series to the wiring board 5. As shown in Fig. 6 and Fig. 7, in this specification, the end face of each coil 6 in the Z1 direction is referred to as a first coil surface 603, and the end face of each coil 6 in the Z2 direction is referred to as a second coil surface 604. As shown in Fig. 4 and Fig. 5, the first coil surface 603 of each coil 6 is covered by the plate 40, and the second coil surface 604 is not covered and is exposed in the space between the coil holder 30 and the second plate portion 82 of the yoke 80 and the second magnet 72.

[0039] 4, in this embodiment, the plate thickness T of the plate portion 33 of the coil holder 30 is greater than the thickness t of each coil 6 in the first direction Z. Therefore, the thickness t of each coil 6 in the first direction Z is smaller than the depth of the first coil arrangement hole 31 and the second coil arrangement hole. For this reason, the surface of each coil 6 that is exposed and not covered by the plate 40 (the second coil surface 604) is located in the Z1 direction further than the surface of the plate portion 33 in the Z2 direction.

[0040] 6 and 7, two coil wires 60 are drawn out from each coil 6 to the Z1 side of the coil 6. The coil wires 60 are routed so as to pass through a gap S between the first coil surface 603 of each coil 6 and the plate 40 (see the partially enlarged view of FIG. 5). Although not shown in FIG. 5, an adhesive is placed in the gap S between the first coil surface 603 and the plate 40 to fix the coil 6 to the plate 40. Therefore, when the coil 6 is fixed to the plate 40, the coil wires 60 are fixed so as not to move by the adhesive.

[0041] As shown in Fig. 7, the two coil wires 60 drawn from each coil 6 are made up of a winding start coil wire 64 drawn from the inner circumferential surface of the center hole 602 and a winding end coil wire 65 drawn from the outer circumferential surface 605 of the coil. The winding start coil wire 64 of the second coil 62 is The coil wire 65 is connected to the winding end side coil wire 65 drawn out from the outer circumferential surface 605 of the first coil 61 to form a jumper wire 66 that is connected between the two coils 6. The jumper wire 66 is routed to the first coil 61 through a path that overlaps the surface of the second coil 62 in the Z1 direction.

[0042] On the other hand, the winding end coil wire 65 of the second coil 62 and the winding start coil wire 64 of the first coil 61 are both routed to the wiring board 5 through paths overlapping the first coil surface 603 of the first coil 61 and connected to the wiring board 5. At this time, the winding end coil wire 65 of the second coil 62 and the winding start coil wire 64 of the first coil 61 are bent in the Z2 direction at a corner where the first coil surface 603 of the first coil 61 and the coil outer peripheral surface 605 are connected, and are routed in a shape that rises in the Z2 direction along the coil outer peripheral surface 605, before being bent in the X1 direction and extending toward the wiring board 5.

[0043] As shown in FIG. 2 and FIG. 6, two wiring grooves 37 extending in the X1 direction from the first coil arrangement hole 31 are formed on the Z2-direction surface of the plate portion 33 of the coil holder 30. The two wiring grooves 37 are provided on both sides in the second direction X of an opening 301 located between the first coil arrangement hole 31 and the wiring board 5. The ends of the wiring grooves 37 in the X1 direction penetrate the third side plate portion 34 of the coil holder 30 and open on the side surface of the coil holder 30 in the X1 direction. The winding end side coil wire 65 accommodated in one of the two wiring grooves 37 and the winding start side coil wire 64 accommodated in the other are bent in the Z1 direction at the edge of the wiring board 5 fixed to the side surface of the coil holder 30 in the X1 direction, and are connected to lands provided on the surface of the wiring board 5.

[0044] (Actuator assembly method) When assembling the actuator 1, the coil holder 30, the first coil 61, the second coil 62, and the plate 40 are assembled to form the coil set 8. At this time, first, the crossover wire 66 connecting the winding start side coil wire 64 of the second coil 62 and the winding end side coil wire 65 of the first coil 61 is routed to the Z1 side of the second coil 62, and the winding end side coil wire 65 of the second coil 62 and the winding start side coil wire 64 of the first coil 61 are routed to the Z1 side of the first coil 61 and extended in the X1 direction (see FIG. 7), and then the first coil 61 and the second coil 62 are positioned on the surface of the plate 40 in the Z2 direction and fixed to the plate 40 by adhesive. As a result, the four coil wires 60 are routed so as not to overlap on the surface (second coil surface 604) on the exposed side, and are passed through the gap S between the plate 40 and the coil 6 (first coil 61, second coil 62).

[0045] Next, the first coil 61 is inserted into the first coil arrangement hole 31 from the Z1 direction, and the second coil 62 is inserted into the second coil arrangement hole 32 from the Z1 direction, and the plate 40 is assembled from the Z1 direction to the plate portion 33 of the coil holder 30. At this time, the winding end coil wire 65 of the second coil 62 and the winding start coil wire 64 of the first coil 61 are raised in the Z2 direction along the coil outer peripheral surface 605 of the first coil 61 and accommodated in the gap between the coil outer peripheral surface 605 and the inner peripheral surface of the first coil arrangement hole 31.

[0046] Two coil wires 60 (a winding start coil wire 64 of the first coil 61 and a winding end coil wire 65 of the second coil 62) drawn out in the Z2 direction of the plate portion 33 from the gap between the first coil 61 and the inner peripheral surface of the first coil arrangement hole 31 are bent in the X1 direction, accommodated in the wiring groove 37, and drawn out to the wiring board 5 side from a notch provided in the X1 direction side surface of the coil holder 30. As shown in FIG. 6, a board fixing groove 50 is provided in the X1 direction side surface of the coil holder 30 for inserting and fixing the wiring board 5 from the Z2 direction. The coil wire 60 drawn out from the wiring groove 37 to the X1 direction side surface of the coil holder 30 is fixed by soldering to a land provided on the X1 direction surface of the wiring board 5 inserted in the board fixing groove 50.

[0047] When the plate 40 is attached to the coil holder 30, the plate body 41 is inserted from the Z1 direction. The plate 40 is brought into contact with the recess 304 formed on the inner peripheral surface of the third side plate 34 of the coil holder 30 (see FIG. 3), and a pair of edge portions 43 provided at both ends of the plate 40 in the second direction X are fitted into step portions 303 formed on the inner peripheral surface of the opening 301 in the X2 direction and the inner peripheral surface of the opening 302 in the X1 direction (see FIG. 4). In addition, a pair of bent plate portions 42 extending in the Z1 direction from both ends of the plate 40 in the third direction Y are fitted into recesses 304 formed on the inner peripheral surface of the third side plate portion 34 of the coil holder 30 (see FIG. 3).

[0048] Next, the first case member 10 and the first yoke 85 are connected by the first connecting body 91. For example, after the first magnet 71 is fixed to the first plate portion 81 of the first yoke 85, the first plate portion 81 is placed on the first connecting body 91 arranged in the recess 13 of the first case member 10.

[0049] Next, the coil set 8 is stacked on the first case member 10 from the Z2 direction. At this time, the connecting plate portions 83, 84 of the first yoke 85 are passed through the openings 301, 302 of the coil holder 30, and two positioning pins 38 (see FIG. 3) protruding in the Z1 direction from the X1 direction end of the coil holder 30 are fitted into two positioning holes 16 (see FIG. 2) provided at the X1 direction end of the first case member 10.

[0050] Thereafter, the first yoke 85 and the second yoke 86 are joined to assemble the movable body 3. For example, after the second magnet 72 is fixed to the second yoke 86 consisting of the second plate portion 82, both ends of the second yoke 86 in the second direction X are joined to the tips of the connecting plate portions 83 and 84 by welding.

[0051] Finally, the second case member 20 is placed over the coil holder 30 and the yoke 80 from the Z2 direction. At this time, two positioning pins 39 (see FIG. 2) protruding in the Z2 direction from the X1 direction end of the coil holder 30 are fitted into two positioning holes 26 (see FIG. 3) provided at the X1 direction end of the second case member 20. Then, as described above, the first case member 10, the coil holder 30, and the second case member 20 are fixed with screws at the four corners.

[0052] (Main effects of this form) As described above, the actuator 1 of this embodiment includes the support 2 and the movable body 3, the connector 9 connected to the support 2 and the movable body 3 and having at least one of elasticity and viscoelasticity, and the magnetic drive circuit 4 for moving the movable body 3 relative to the support 2. The magnetic drive circuit 4 includes the coil 6 provided on the support 2 and the magnet 7 provided on the movable body 3 and facing the coil 6 in the first direction Z, and drives the movable body 3 in the second direction X intersecting the first direction Z. The support 2 includes the coil holder 30 including the plate portion 33 in which the coil arrangement holes (first coil arrangement hole 31, second coil arrangement hole 32) are provided, the non-magnetic plate 40 overlapping the plate portion 33 from the Z1 direction (one side of the first direction Z), and the wiring board 5 fixed to the side surface of the coil holder 30. The movable body 3 includes a yoke 80 for holding the magnet 7. The yoke 80 includes a first plate portion 81 located in the Z1 direction of the plate 40, a second plate portion 82 located in the Z2 direction (the other side of the first direction Z) of the plate portion 33, and a pair of connecting plate portions 83, 84 connecting both ends of the first plate portion 81 and the second plate portion 82. A magnet 7 is fixed to the first plate portion 81 and the second plate portion 82. The Z2 direction surface (second coil surface 604) of the coil 6 is exposed in the space between the plate portion 33 and the second plate portion 82. The coil wire 60 (winding start side coil wire 64) drawn out from the center of the coil 6 passes through a gap S between the Z1 direction surface (first coil surface 603) of the coil 6 and the plate 40, and is drawn to the wiring board 5.

[0053] According to this embodiment, only the Z1 direction surface (first coil surface 603) of the coil holder 30 is covered with the non-magnetic plate 40, and the Z2 direction surface (second coil surface 604) is left exposed without being covered by a plate, and the coil wire 60 is routed so as to pass through the gap S between the plate 40 and the coil 6. Therefore, since the coil wire 60 is covered with the plate 40, even when vibrations during operation or impact from being dropped are applied, the coil wire 60 will not come into contact with the magnet 7 or yoke 80, causing breakage or short circuit. This can prevent the occurrence of problems. Also, since it is necessary to attach the plate 40 at only one place, the number of plates 40 can be minimized. Therefore, an increase in the number of parts can be suppressed. Furthermore, since it is not necessary to adhesively fix the coil wire 60 to the coil 6 in order to prevent the coil wire 60 from floating, an increase in the number of assembly steps can be suppressed.

[0054] In this embodiment, the magnetic drive circuit 4 includes a first coil 61 and a second coil 62 aligned in the second direction X. The plate portion 33 is provided with a first coil arrangement hole 31 and a second coil arrangement hole 32 aligned in the second direction X. The coil wire 60 (winding start coil wire 64) drawn from the center of the second coil 62 passes through the gap S between the second coil 62 and the plate 40 and is connected to the winding end coil wire 65 of the first coil 61 to form a jumper wire 66. In this manner, the coil wire 60 (jump wire 66) connecting the first coil 61 and the second coil 62 can be covered by the plate 40. The jumper wire 66 is drawn so as to overlap at least one of the first coil 61 and the second coil 62, so that it is not possible to accommodate the jumper wire 66 by providing a groove in the coil holder 30, and the jumper wire 66 is likely to float from the coil. In this embodiment, the jumper wire 66 can be covered by the plate 40, so that it is possible to prevent the jumper wire 66 from coming into contact with the magnet 7 and causing a break or short circuit.

[0055] In this embodiment, the coil 6 is fixed to the plate 40 by an adhesive. Therefore, when manufacturing the actuator 1, the coil 6 can be positioned and fixed to the plate 40 in advance, and then the plate 40 can be assembled to the coil holder 30. This improves the positional accuracy of the coil 6. Also, when the plate 40 and the coil 6 (the first coil 61 and the second coil 62) are assembled to the coil holder 30, the jumper wire 66 is covered by the plate 40, so that the jumper wire 66 can be prevented from coming into contact with other components and being broken.

[0056] In this embodiment, the depth of the first coil arrangement hole 31 and the second coil arrangement hole 32 in the first direction Z (i.e., the plate thickness T of the plate portion 33) is greater than the thickness t of the coil 6 in the first direction Z. Therefore, the coil 6 can be assembled in a state in which the Z2 direction surface (second coil surface 604) is recessed from the Z2 direction surface of the plate portion 33 of the coil holder 30. This makes it possible to prevent the coil 6 from coming into contact with the magnet 7 and causing a break or short circuit, even when vibrations during operation or a drop impact are applied.

[0057] In this embodiment, the coil wire 60 passed through the gap S between the coil 6 and the plate 40 is drawn out along the coil outer peripheral surface 605 to the surface of the plate portion 33 in the Z2 direction, accommodated in the wiring groove 37 provided in the plate portion 33, and routed to the wiring board 5. In this way, after the plate 40 and the coil 6 are assembled to the coil holder 30, the coil wire 60 can be routed via the surface on the side not covered by the plate 40. Therefore, the connection work of the coil wire 60 to the wiring board 5 can be easily performed. In addition, when the coil wire 60 is routed on the side not covered by the plate 40, the coil wire 60 can be accommodated in the wiring groove 37. Therefore, it is possible to prevent the coil wire 60 from coming into contact with the magnet 7 or the yoke 80, causing a break or a short circuit.

[0058] In this embodiment, the coil holder 30 is provided with a pair of openings 301, 302 penetrating both sides in the second direction X of the region in which the first coil arrangement hole 31 and the second coil arrangement hole 32 are provided. A pair of connecting plate parts 83, 84 of the yoke 80 are arranged in the pair of openings 301, 302. The wiring board 5 is arranged on the side surface of the coil holder 30 in the X1 direction. The wiring groove 37 passes through both sides of the opening 301 located in the X1 direction and extends to the wiring board 5. By providing the wiring groove 37 at such a position, it is possible to prevent the coil wire 60 from coming into contact with the magnet 7 or the yoke 80 and causing a break or a short circuit when the coil wire 60 is routed to the wiring board 5 arranged on the side surface in the longitudinal direction (second direction X) of the support 2.

[0059] In this embodiment, the support 2 is a first case member 10 that overlaps the coil holder 30 from the Z1 direction. and a second case member 20 overlapping the coil holder 30 from the Z2 direction. The connecting body 9 includes a first connecting body 91 sandwiched between the first case member 10 and the first plate portion 81 in a state compressed in the first direction Z, and a second connecting body 92 sandwiched between the second case member 20 and the second plate portion 82 in a state compressed in the first direction Z. In this way, when the connecting body 9 is disposed on the outside of the yoke 80 rather than on the inside, it is not necessary to cover both sides of the coil holder 30 with plates to ensure flat surfaces for fixing the connecting body 9. This makes it possible to suppress an increase in the number of parts.

[0060] 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 adopt a configuration in which the magnets 7 are arranged only in the Z1 direction relative to the coil 6, or a configuration in which the magnets 7 are arranged only in the Z2 direction relative to the coil 6. In addition, in this embodiment, two sets of coils 6 and magnets 7 facing each other in the first direction Z are provided, but the number of sets of coils 6 and magnets 7 facing each other in the first direction Z is not limited to two.

[0061] (Other embodiments) The following embodiments can be adopted as the present invention. (1) A magnetic actuator having a support body and a movable body, a connector connected to the support body and the movable body and having at least one of elasticity and viscoelasticity, and 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 includes a coil holder having a plate portion with a coil arrangement hole; a non-magnetic plate overlapping the plate portion from one side in the first direction; a wiring board fixed to a side surface of the coil holder, the movable body includes a yoke that holds the magnet, the yoke including a first plate portion located on one side of the plate in the first direction, a second plate portion located on the other side of the plate portion in the first direction, and a pair of connecting plate portions that connect both ends of the first plate portion and the second plate portion, the magnet being fixed to at least one of the first plate portion and the second plate portion, the coil has a surface on the other side in the first direction exposed in a space between the plate portion and the second plate portion, An actuator, characterized in that a coil wire drawn from the center of the coil passes through a gap between the coil and the plate and is routed to the wiring board.

[0062] (2) The magnetic drive circuit includes two of the coils arranged in the second direction, The plate portion is provided with two coil arrangement holes aligned in the second direction, The actuator according to (1) above, characterized in that a coil wire drawn from the center of one of the coils passes through the gap between the coil and the plate and is connected to the other of the coils.

[0063] (3) The actuator according to (1) or (2) above, wherein the coil is fixed to the plate by an adhesive.

[0064] (4) The actuator according to any one of (1) to (3) above, characterized in that the depth of the coil placement hole in the first direction is greater than the thickness of the coil in the first direction.

[0065] (5) An actuator according to any one of (1) to (4) above, characterized in that the coil wire passed through the gap between the coil and the plate is pulled out along the outer peripheral surface of the coil to the other surface of the plate portion in the first direction, accommodated in a wiring groove provided in the plate portion, and pulled to the wiring board.

[0066] (6) The coil holder is provided with a pair of openings penetrating both sides of the coil arrangement hole in the second direction, The pair of connecting plate portions are disposed in the pair of openings, the wiring board is disposed on one side surface of the coil holder in the second direction, The actuator according to any one of (1) to (5) above, wherein the wiring groove passes through both sides of the opening located on one side in the second direction and extends to the wiring substrate.

[0067] (7) The support body includes a first case member overlapping the coil holder from one side in the first direction and a second case member overlapping the coil holder from the other side in the first direction, The actuator of any of (1) to (6) above, characterized in that the connecting body includes a first connecting body sandwiched between the first case member and the first plate portion while being compressed in the first direction, and a second connecting body sandwiched between the second case member and the second plate portion while being compressed in the first direction. [Explanation of symbols]

[0068] 1...actuator, 2...support, 3...movable body, 4...magnetic drive circuit, 5...wiring board, 6...coil, 7...magnet, 8...coil set, 9...connector, 10...first case member, 11...first end plate portion, 12...first side plate portion, 13...recess, 14...first boss portion, 15...screw hole, 16...positioning hole, 20...second case member, 21...second end plate portion, 22...second side plate portion, 23...recess, 24...second boss portion, 25...through hole, 26...positioning hole, 30...coil holder, 31...first coil arrangement hole, 32...second coil arrangement hole, 33...plate portion, 34...third side plate portion, 35...third boss portion, 36...through hole, 37...wiring groove, 38, 39...positioning pin, 40...plate, 41...plate main body, 42...bent plate portion, 43...edge portion, 44...step portion, 50...board fixing groove, 60...coil wire, 61...first coil, 62...second coil, 64...winding start side coil wire, 65...winding end side coil wire, 66...crossover wire, 71...first magnet, 72...second magnet, 80...yoke, 81...first plate portion, 82...second plate portion, 83, 84...connecting plate portion, 85...first yoke, 86...first yoke, 91...first connector, 92...second connector, 301, 302...opening, 303...step portion, 304...recess, 601...effective side, 602...center hole, 603...first coil surface, 604...second coil surface, 605...coil outer surface, S...gap, X...second direction, Y...third direction, Z...first direction

Claims

1. a connecting member connected to the support and the movable body and having at least one of elasticity and viscoelasticity; and a magnetic drive circuit for moving 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 and facing the coil in a first direction, and drives the movable body in a second direction intersecting the first direction; The support includes a coil holder having a plate portion with a coil arrangement hole; a non-magnetic plate overlapping the plate portion from one side in the first direction; a wiring board fixed to a side surface of the coil holder, the movable body includes a yoke that holds the magnet, the yoke including a first plate portion located on one side of the plate in the first direction, a second plate portion located on the other side of the plate portion in the first direction, and a pair of connecting plate portions that connect both ends of the first plate portion and the second plate portion, the magnet being fixed to at least one of the first plate portion and the second plate portion, the coil has a surface on the other side in the first direction exposed in a space between the plate portion and the second plate portion, An actuator, characterized in that a coil wire drawn from the center of the coil passes through a gap between the coil and the plate and is routed to the wiring board.

2. the magnetic drive circuit includes two of the coils aligned in the second direction, The plate portion is provided with two coil arrangement holes aligned in the second direction, 2. The actuator according to claim 1, wherein a coil wire drawn from the center of one of the coils passes through a gap between the coil and the plate and is connected to the other of the coils.

3. 2. The actuator of claim 1, wherein the coil is fixed to the plate by an adhesive.

4. 2 . The actuator according to claim 1 , wherein the depth of the coil arrangement hole in the first direction is greater than the thickness of the coil in the first direction.

5. The actuator according to claim 1, characterized in that the coil wire passed through the gap between the coil and the plate is pulled out along the outer peripheral surface of the coil to the other surface of the plate portion in the first direction, accommodated in a wiring groove provided in the plate portion, and routed to the wiring board.

6. the coil holder is provided with a pair of openings penetrating both sides of the coil arrangement hole in the second direction, The pair of connecting plate portions are disposed in the pair of openings, the wiring board is disposed on one side surface of the coil holder in the second direction, 6. The actuator according to claim 5, wherein the wiring groove passes through both sides of the opening located on one side in the second direction and extends to the wiring substrate.

7. the support body includes a first case member overlapping the coil holder from one side in the first direction, and a second case member overlapping the coil holder from the other side in the first direction, The actuator described in claim 1, characterized in that the connecting body includes a first connecting body sandwiched between the first case member and the first plate portion in a state compressed in the first direction, and a second connecting body sandwiched between the second case member and the second plate portion in a state compressed in the first direction.

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