Patent Publication Number: US-11050334-B2

Title: Actuator

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application claims priority under 35 U.S.C. § 119 to Japanese Application No. 2018-068099 filed Mar. 30, 2018, the entire content of which is incorporated herein by reference. 
     BACKGROUND 
     At least an embodiment of the present invention relates to an actuator that linearly drives a movable body to vibrate, and a method for manufacturing an actuator. 
     As a device that provides information by vibration, an actuator including a movable body having a permanent magnet and a support body having a coil disposed to face the permanent magnet is proposed. The support body includes a coil holder that holds a coil, a case that covers the movable body and the coil holder, and a power supply body to which a coil wire forming the coil is connected (see Japanese Unexamined Patent Application Publication No. 2016-127789). In the actuator described in Japanese Unexamined Patent Application Publication No. 2016-127789, the power supply board is fixed to the case so as to protrude from the case. 
     The actuator described in Japanese Unexamined Patent Application Publication No. 2016-127789 is required to be usable in a wide temperature range. However, when the temperature changes, stress is applied to the coil wire due to a difference in a thermal expansion coefficient between the coil wire and peripheral parts, and there is a possibility that the coil wire is cut. Therefore, it is desirable to provide the coil wire with appropriate slackness, but providing appropriate slackness is quite difficult. 
     In view of the above problem, at least an embodiment of the present invention provides an actuator capable of easily providing appropriate slackness to a coil wire between a coil and a power supply board, and a method for manufacturing an actuator. 
     SUMMARY 
     An actuator according to at least an embodiment of the present invention includes: a movable body; aa support body; aa connecting body having at least one of elasticity and viscoelasticity, and is disposed to be in contact with both the movable body and the support body in a position in which the movable body and the support body face each other; and a magnetic driving circuit including a coil provided in a first member that is one of the movable body and the support body, and a permanent magnet provided in a second member that is one of the movable body and the support body so as to face the coil in a first direction, the magnetic driving circuit causing the movable body to vibrate with respect to the support body in a second direction which intersects with the first direction, wherein the first member includes a coil holder that holds the coil, a power supply board to which a coil wire forming the coil extending from a first side to a second side in the first direction is connected, and both end portions of the power supply board being fit, from a second side in the first direction, inside of a pair of slits extending to a first side in the first direction in positions in which the slits face each other of the coil holder. The power supply board is fit in the pair of slits to a depth in which the power supply board is in contact with a contact portion provided in the coil holder from the second side in the first direction, and the coil wire is slackened between the coil and a connecting position with the power supply board. 
     In at least an embodiment of the present invention, the coil wire forming the coil extends from the first side to the second side in the first direction and is connected to the power supply board, and both end portions of the power supply board are fit, from the second side in the first direction, inside of the pair of slits extending to the first side in the first direction in positions in which the slits face each other of the coil holder. Here, the power supply board is fit in the pair of slits to a depth in which the power supply board is in contact with a contact portion provided in the coil holder from the second side in the first direction, and is positioned on the furthermost part of the first side in the first direction. Therefore, it is possible to easily provide appropriate slackness to the coil wires extending from the first side to the second side in the first direction. 
     In at least an embodiment of the present invention, in a method for manufacturing an actuator that includes a movable body; aa support body; and a connecting body disposed so as to be in contact with both the movable body and the support body in a position in which the movable body and the support body face each other; and a magnetic driving circuit including a coil provided in a first member that is one of the movable body and the support body, and a permanent magnet provided in a second member that is one of the movable body and the support body so as to face the coil in a first direction, the magnetic driving circuit causing the movable body to vibrate with respect to the support body in a second direction which intersects with the first direction, the method comprising: providing a pair of slits extending to a first side in the first direction in positions in which the slits face each other of the coil holder that holds the coil in the first member; when both the end portions of the power supply board are fit inside the pair of slits from a second side in the first direction, in a middle position until the power supply board comes into contact with a contact portion provided in the coil holder from the second side in the first direction, drawing the coil wire forming the coil from the first side to the second side in the first direction and connecting the coil wire to the power supply board; and then, pushing the power supply board into the pair of slits to a depth in which the power supply board comes into contact with the contact portion from the second side in the first direction. 
     In at least an embodiment of the present invention, a configuration may be employed in which the coil wire is made to tense in a depth position in which the power supply board is separated from the contact portion to the second side in the first direction while being fit in the pair of slits. 
     In at least an embodiment of the present invention, a configuration may be employed in which the power supply board is a rigid board. 
     In at least an embodiment of the present invention, a configuration may be employed in which the width of the pair of slits is narrower from the middle in the depth direction. With this configuration, when the power supply board is inserted to the position in which the widths of the slits are decreased, the power supply board is temporarily fixed to the slits. Therefore, when the power supply board is pushed deeper into the slits after connecting the coil wires to the temporarily fixed power supply board, the coil wires can be slackened. 
     In at least an embodiment of the present invention, a configuration may be employed in which the first member is the support body and the second member is the movable body. That is, a configuration may be employed in which the coil is provided in the support body and the magnet is provided in the movable body. 
     In at least an embodiment of the present invention, the coil wire forming the coil extends from the first side to the second side in the first direction and is connected to the power supply board, and both end portions of the power supply board are fit, from the second side in the first direction, inside of the pair of slits extending to the first side in the first direction in positions in which the slits face each other of the coil holder. Here, the power supply board is fit in the pair of slits to a depth in which the power supply board is in contact with a contact portion provided in the coil holder from the second side in the first direction, and is positioned on the furthermost part of the first side in the first direction. Therefore, it is possible to easily provide appropriate slackness to the coil wires extending from the first side to the second side in the first direction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments will now be described, by way of example only, with reference to the accompanying drawings which are meant to be exemplary, not limiting, and wherein like elements are numbered alike in several Figures, in which: 
         FIG. 1  is a perspective view of an actuator to which at least an embodiment of the present invention is applied; 
         FIG. 2  is a cross-sectional view along Y and Z directions of the actuator illustrated in  FIG. 1 ; 
         FIG. 3  is an exploded perspective view of the actuator illustrated in  FIG. 1 ; 
         FIG. 4  is an exploded perspective view of the actuator illustrated in  FIG. 1  disassembled into a support body and a movable body; 
         FIG. 5  is an exploded perspective view of the support body illustrated in  FIG. 4  when viewed from a second side in a first direction; 
         FIG. 6  is an exploded perspective view of the support body illustrated in  FIG. 4  when viewed from a first side in the first direction; 
         FIG. 7  is an explanatory diagram of a fixing structure of a power supply board in the actuator illustrated in  FIG. 1 ; 
         FIG. 8  is an explanatory diagram of slits that hold the power supply board illustrated in  FIG. 7 ; 
         FIG. 9  is an explanatory diagram of a step of fixing a coil to a coil holder in a manufacturing process of the actuator illustrated in  FIG. 1 ; 
         FIG. 10  is a plan view of a step of fixing the coil to the coil holder illustrated in  FIG. 5 ; and 
         FIG. 11A  and  FIG. 11B  are explanatory diagrams of a step of fixing the power supply board to the coil holder illustrated in  FIG. 5 . 
     
    
    
     DETAILED DESCRIPTION 
     Below, embodiments of the present invention will be described with reference to the drawings. In the following description, a direction in which a movable body  6  is moved linearly (second direction, vibration direction) is denoted by X, a first direction which intersects with the second direction X is denoted by Z, and a third direction which intersects with the first direction Z and the second direction X is denoted by Y. Further, a first side in the second direction X is denoted by X 1 , a second side in the second direction X is denoted by X 2 , a first side in the first direction Z is denoted by Z 1 , a second side in the first direction Z is denoted by Z 2 , a first side in the third direction Y is denoted by Y 1 , and a second side in the third direction Y is denoted by Y 2 . Below, a case in which a first member holding the coil is a support body  2  and a second member holding a permanent magnet is the movable body  6  is mainly described. 
     (Entire Configuration) 
       FIG. 1  is a perspective view of an actuator  1  to which at least an embodiment of the present invention is applied.  FIG. 2  is a cross-sectional view along Y and Z directions of the actuator  1  illustrated in  FIG. 1 .  FIG. 3  is an exploded perspective view of the actuator  1  illustrated in  FIG. 1 .  FIG. 4  is an exploded perspective view of the actuator  1  illustrated in  FIG. 1  disassembled into the support body  2  and the movable body  6 .  FIG. 5  is an exploded perspective view of the support body  2  illustrated in  FIG. 4  when viewed from the second side Z 2  in the first direction Z.  FIG. 6  is an exploded perspective view of the support body  2  illustrated in  FIG. 4  when viewed from the first side Z 1  in the first direction Z. 
     The actuator  1  illustrated in  FIG. 1  has a rectangular parallelepiped shape with its longitudinal direction oriented in the third direction Y. The actuator  1  provides the user who holds the actuator  1  in the hand with information by vibration in the second direction X. Accordingly, the actuator  1  can be used as an operation member, etc. of a game machine, of which vibration and the like provides a user with new feeling. 
     As illustrated in  FIG. 2 ,  FIG. 3 , and  FIG. 4 , the actuator  1  includes the support body  2  including a rectangular case  3  that defines an outer shape of the actuator  1 , and the movable body  6  supported to be movable inside the case  3  in the second direction X with respect to the support body  2 . The actuator  1  outputs information when the movable body  6  vibrates in the second direction X. 
     In the present embodiment, as will be described below with reference to  FIG. 2  to  FIG. 6 , the support body  2  includes the case  3 , the coil holder  4 , the coil  5 , and a power supply board  10 , and the movable body  6  includes permanent magnets (first permanent magnet  71  and second permanent magnet  72 ), and yokes (first yoke  81  and second yoke  82 ). The coil  5  and the permanent magnets (the first permanent magnet  71  and the second permanent magnet  72 ) form a magnetic driving circuit  1   a . The movable body  6  is supported by the support body  2  via connecting bodies  91  and  92  provided between the movable body  6  and the support body  2 . The connecting bodies  91  and  92  have at least one of elasticity and viscoelasticity. 
     (Configuration of Movable Body  6 ) 
     As illustrated in  FIG. 2 ,  FIG. 3 , and  FIG. 4 , the movable body  6  includes the first yoke  81  disposed on the first side Z 1  in the first direction Z with respect to the coil  5  and is made of a magnetic plate, and the flat-plate shaped first permanent magnet  71  held on a surface of the first yoke  81  on the second side Z 2  in the first direction Z so as to face the coil on the first side Z 1  in the first direction Z. Further, the movable body  6  includes the second yoke  82  disposed on the second side Z 2  in the first direction Z with respect to the coil  5  and is made of a magnetic plate, and the flat-plate shaped second permanent magnet  72  held on a surface of the second yoke  82  on the first side Z 1  in the first direction Z so as to face the coil on the second side Z 2  in the first direction Z. In the present embodiment, the movable body  6  is formed by the first yoke  81 , the first permanent magnet  71 , the second yoke  82 , and the second permanent magnet  72 . 
     The first yoke  81  includes a flat plate part  811  to which the first permanent magnet  71  is fixed, and a pair of connecting portions  812  bent to the second side Z 2  in the first direction Z from end portions on both sides of the flat plate part  811  in the second direction X. The second yoke  82  includes a flat plate part  821  to which the second permanent magnet  72  is fixed, and a pair of projecting portions  822  projecting to the first side X 1  and the second side X 2  in the second direction X is formed in a center part of the flat plate part  821  in the third direction Y. In the present embodiment, a pair of connecting portions  812  of the first yoke  81  is coupled to the pair of projecting portions  822  by welding or the like. 
     Each of the first permanent magnet  71  and the second permanent magnet  72  is magnetized to have different polarities on the first side X 1  and the second side X 2  in the first direction. 
     (Configuration of Support Body  2 ) 
     As illustrated in  FIG. 1 ,  FIG. 2  and  FIG. 3 , in the support body  2 , the case  3  includes a first case member  31  positioned on the first side Z 1  in the first direction Z and a second case member  32  positioned on the second side Z 2  in the first direction Z to overlap the first case member  31 . The case  3  is formed by a pair of side plate parts  311  provided on both sides in the second direction X of the first case member  31 , and a pair of side plate parts  321  provided on both sides in the second direction X of the second case members  32 . The pair of side plate parts  321  is disposed over the pair of side plate parts  311 . Between the first case member  31  and the second case member  32 , the coil holder  4 , the coil  5  and the movable body  6  illustrated in  FIG. 4  and  FIG. 5  are accommodated. In the present embodiment, both ends of the case  3  in the third direction Y are open. 
     In the pair of side plate parts  311  of the first case member  31  and the pair of side plate parts  321  of the second case member  32 , cutouts  311   a ,  321   a ,  311   b , and  321   b  are formed at both end portions in the third direction Y. Engagement holes  321   d  are formed in positions separated in the third direction Y in the side plate part  321 . 
     As illustrated in  FIG. 5 , the coil  5  is an air-core coil having an annular planar shape wound in an oval shape, and is held by the coil holder  4 . The coil  5  includes two long side portions  51  extending in the third direction Y in parallel in the second direction X, and two arc-shaped short side portions  52  connecting both ends of the two long side portions  51  in the third direction Y. The first permanent magnet  71  faces the long side portions  51  of the thus-configured coil  5  on the first side Z 1  in the first direction Z, and the second permanent magnet  72  faces the long side portions  51  on the second side Z 2  in the first direction Z. 
     As illustrated in  FIG. 4  and  FIG. 5 , the coil holder  4  is provided with a plate part  41  in which a coil placement hole  410  is formed through in the first direction Z. The coil placement hole  410  is an oval through-hole in which the coil  5  is placed. 
     At an end portion  411  of the plate part  41  on the first side Y 1  in the third direction Y, a plurality of recessed parts  411   b  extending in the second direction X is formed on a surface on the second side Z 2  in the first direction Z, and a plurality of recessed parts (not illustrated) similar to the recessed part  411   b  is also formed on the surface on the first side Z 1  in first direction Z. 
     At the end portion  411 , a side plate part  413  protrudes to the first side Z 1  in the first direction Z from an edge on the first side Y 1  in the third direction Y, and side plate parts  414  and  415  protrude to the first side Z 1  and the second side Z 2  in the first direction Z from an edge on the first side X 1  in the second direction X and an edge on the second side X 2  in the second direction X, respectively. On inner surfaces  414   s  and  415   s  of the side plate parts  414  and  415 , first holding portions  414   a  and  415   a , which are groove-shaped recessed parts extending in the first direction Z, are formed on the first side Z 1  in the first direction Z with respect to the plate part  41 . Further, on the inner surfaces  414   s  and  415   s  of the side plate parts  414  and  415 , second holding portions  414   b  and  415   b , which are groove-shaped recessed parts extending in the first direction Z, are formed on the second side Z 2  in the first direction Z with respect to the plate part  41 . 
     At the end portion  412  of the plate part  41  on the second side Y 2  in the third direction Y, a plurality of recessed parts  412   b  extending in the second direction X is formed on a surface on the second side Z 2  in the first direction Z, and a plurality of recessed parts  412   a  similar to the recessed parts  412   b  is also formed on a surface on the first side Z 1  in the first direction Z. 
     At the end portion  412 , side plate parts  417 ,  418 , and  419  protrude to the first side Z 1  and the second side Z 2  in the first direction Z from an edge on the second side Y 2  in the third direction Y, an edge on the first side X 1  in the second direction X, and an edge on the second side X 2  in the second direction X. On inner surfaces  418   s  and  419   s  of the side plate parts  418  and  419 , first holding portions  418   a  and  419   a , which are groove-shaped recessed parts extending in the first direction Z, are formed on the first side Z 1  in the first direction Z with respect to the plate part  41 . Further, on the inner surfaces  418   s  and  419   s  of the side plate parts  418  and  419 , second holding portions  418   b  and  419   b , which are groove-shaped recessed parts extending in the first direction Z, are formed on the second side Z 2  in the first direction Z with respect to the plate part  41 . 
     A protruding portion  414   e  with which the cutouts  311   a  formed in the pair of side plate parts  311  of the first case member  31  and the cutouts  321   a  formed in the pair of side plate parts  321  of the second case member  32  come into contact is formed at an end portion on the first side Y 1  in the third direction Y on an outer surface of the side plate part  414 . A protruding portion  415   e  similar to the protruding portion  414   e  is formed also on an outer surface of the side plate part  415 . A protruding portion  418   e  with which the cutouts  311   b  formed in the pair of side plate parts  311  of the first case member  31  and the cutouts  321   b  formed in the pair of side plate parts  321  of the second case member  32  come into contact is formed at an end portion on the second side Y 2  in the third direction Y on an outer surface of the side plate part  418 . A protruding portion (not illustrated) similar to the protruding portion  418   e  is formed also on an outer surface of the side plate part  419 . 
     Engagement protruding portions  414   d  and  418   d  for engaging the engagement holes  321   d  formed in each of the pair of side plate parts  321  of the second case member  32  are formed on the outer surface of the side plate part  414  and the outer surface of the side plate part  418 . Engagement protruding portions (not illustrated) similar to the engagement protruding portions  414   d  and  418   d  are formed on the outer surface of the side plate part  415  and the outer surface of the side plate part  419 . 
     (Configuration of First Plate  47  and Second Plate  48 ) 
     The thus-configured support body  2  includes a first plate  47  that overlaps the coil placement hole  410  and the plate part  41  from the first side Z 1  in the first direction Z. The coil  5  is fixed to the first plate  47  and the plate part  41  by an adhesive layer  9  made at least of an adhesive poured into the air-core portion  50  of the coil  5 . Therefore, the coil  5  faces the first permanent magnet  71  in the first direction Z via the first plate  47 . The first plate  47  is fixed to the plate part  41  by the adhesive layer  9 . At this time, the recessed part  412   a  and the like formed in the plate part  41  are reservoirs of the adhesive layer  9 . 
     Further, the support body  2  includes a second plate  48  that overlaps the coil placement hole  410  and the plate part  41  from the second side Z 2  in the first direction Z. The coil  5  is fixed to the second plate  48  by the adhesive layer  9  made at least of an adhesive with which the air-core portion  50  of the coil  5  is filled. Therefore, the coil  5  faces the second permanent magnet  72  in the first direction Z via the second plate  48 . The second plate  48  is fixed to the plate part  41  by the adhesive layer  9 . At that time, the recessed parts  411   b  and  412   b , etc. formed in the plate part  41  are reservoirs of the adhesive layer  9 . 
     In the present embodiment, the first plate  47  is made of a non-magnetic material and the second plate  48  is made of a non-magnetic material. In the present embodiment, the first plate  47  is made of a metal plate and the second plate  48  is made of a metal plate. More specifically, the first plate  47  is made of a non-magnetic stainless-steel plate and the second plate  48  is made of a non-magnetic stainless-steel plate. 
     The first plate  47  includes claw-shaped protruding portions  472  that protrude obliquely from the first side Z 1  in the first direction Z from both sides in the second direction X. The protruding portions  472  come into elastic contact with the inside of the first holding portions  414   a ,  415   a ,  418   a , and  419   a  formed as groove-shaped recessed parts in the side plate parts  414 ,  415 ,  418 , and  419 . The protruding portions  472  are held by the coil holder  4 . The second plate  48  includes claw-shaped protruding portions  482  that protrude obliquely from the second side Z 2  in the first direction Z from both sides in the second direction X. The protruding portions  482  come into elastic contact with the inside of the second holding portions  414   b ,  415   b ,  418   b , and  419   b  formed as groove-shaped recessed parts in the side plate parts  414 ,  415 ,  418 , and  419 . The protruding portions  482  are held by the coil holder  4 . The first plate  47  includes bent portions  473  bent to the first side Z 1  in the first direction Z at both ends in the third direction Y, and bent portions  474  bent to the second side Z 2  in the first direction Z at both ends in the second direction X. The second plate  48  includes bent portions  483  bent to the second side Z 2  in the first direction Z at both ends in the third direction Y, and bent portions  484  bent to the first side Z 1  in the first direction Z at both ends in the second direction X. With this configuration, strength of the first plate  47  and the second plate  48  against bending is increased by the bent portions  473 ,  474 ,  483 , and  484 . 
     As described above, in the actuator  1  of the present embodiment, the coil  5  is disposed inside the coil placement hole  410  formed through the plate part  41  of the coil holder  4  in the first direction Z, and the first plate  47  is disposed so as to overlap the coil placement hole  410  and the plate part  41  from the first side Z 1  in the first direction Z. Therefore, when the air-core portion  50  of the coil  5  is filled with an adhesive, the adhesive flows between the coil  5  and the coil holder  4 , between the coil  5  and the first plate  47 , and between the first plate  47  and the coil holder  4 . When the adhesive is cured, the coil  5 , the first plate  47 , and the coil holder  4  are fixed by the adhesive layer  9 . Therefore, unlike when the adhesive is poured into a gap between an outer circumferential surface of the coil  5  and an inner circumferential surface of the coil placement hole  410 , the coil  5  placed in the coil placement hole  410  of the coil holder  4  can be properly made to adhere to the coil holder  4 . The first plate  47  is interposed between the first permanent magnet  71  and the coil  5 . Therefore, even when the movable body  6  is moved to the first side Z 1  in the first direction Z, the first permanent magnet  71  and the coil  5  do not come into direct contact with each other, so the coil  5  is not easily damaged. 
     Further, when the air-core portion  50  of the coil  5  is filled with the adhesive and then the second plate  48  is placed thereon, the adhesive smoothly flows between the coil  5  and the coil holder  4 , between the coil  5  and the first plate  47 , and between the first plate  47  and the coil holder  4 , and, at the same time, flows between the coil  5  and the second plate  48 , and between the second plate  48  and the coil holder  4 . Therefore, when the adhesive is cured, the coil  5 , the first plate  47 , the second plate  48 , and the coil holder  4  are fixed by the adhesive layer  9 . In this state, the second plate  48  is interposed between the second permanent magnet  72  and the coil  5 . Therefore, even when the movable body  6  is moved to the second side Z 2  in the first direction Z, the second permanent magnet  72  and the coil  5  do not come into direct contact with each other, so the coil  5  is not easily damaged. 
     Since the first plate  47  is made of a non-magnetic material and the second plate  48  is made of a non-magnetic material, the magnetic flux from the first permanent magnet  71  and the magnetic flux from the second permanent magnet  72  interlink with the coil  5  without being affected by the first plate  47  and the second plate  48 . Further, since the first plate  47  is made of a metal plate and the second plate  48  is made of a metal plate, heat generated by the coil  5  can be radiated efficiently through the first plate  47  and the second plate  48 . Further, since the first plate  47  is made of a stainless-steel plate and the second plate  48  is made of a stainless-steel plate, the first plate  47  and the second plate  48  have sufficient strength, even though these plates are thin. 
     Further, the coil holder  4  includes the first holding portions  414   a ,  415   a ,  418   a , and  419   a  that engage the claw-shaped first protruding portions  472  of the first plate  47  and hold the first plate  47 , and the second holding portions  414   b ,  415   b ,  418   b , and  419   b  that engage the claw-shaped second protruding portions  482  of the second plate  48  and hold the second plate  48 . Therefore, it is not necessary to support the first plate  47  and the second plate  48  with a jig until the adhesive is cured. 
     (Configuration of Connecting Bodies  91  and  92 ) 
     As illustrated in  FIG. 2 ,  FIG. 3 ,  FIG. 4 , and  FIG. 5 , the movable body  6  is supported to be movable in the second direction X and the third direction Y by the connecting bodies  91  and  92  provided between the movable body  6  and the support body  2 . 
     In the present embodiment, the connecting bodies  91  are provided in portions in which the first yoke  81  and the first plate  47  face each other in the first direction Z. The connecting bodies  92  are provided in portions in which the second yoke  82  and the second plate  48  face each other in the first direction Z. More specifically, the connecting bodies  91  are provided in two portions separated in the third direction Y (on the side of the short side portions  52  of the coil  5 ) in each of which the first yoke  81  and the first plate  47  face each other in the first direction Z. The connecting bodies  92  are provided in two portions separated in the third direction Y (on the side of the short side portions  52  of the coil  5 ) in each of which the second yoke  82  and the second plate  48  face each other in the first direction Z. Therefore, the movable body  6  can be supported to be movable in the second direction X without using a plate spring or the like. 
     In the present embodiment, the connecting bodies  91  and  92  are viscoelastic members. More specifically, the connecting bodies  91  and  92  (viscoelastic members) are gel members made of silicone gel or the like. In the present embodiment, the connecting bodies  91  and  92  are made of silicone gel having penetration of 90° to 110°. As defined in JIS K 2207 and JIS K 2220, the penetration is measured as the penetration depth of a ¼ scale cone needle, which weighs 9.38 g, penetrating per 5 seconds at 25° C., is expressed in 1/10 mm: the smaller the value is, the harder the silicone is. Fixing of the connecting bodies  91  and  92  to the first yoke  81  and to the second yoke  82  and fixing of the connecting bodies  91  and  92  to the coil holder  4  are performed by using an adhesive property of adhesives or a silicone gel. 
     As described above, in the actuator  1  of the present embodiment, since the connecting bodies  91  and  92  are provided between the movable body  6  and the support body  2 , resonance of the movable body  6  can be suppressed. The connecting bodies  91  are provided between the first plate  47  and the first yoke  81 , and the connecting bodies  92  are provided between the second plate  48  and the second yoke  82 . Thus, the case  3  is not used to provide the connecting bodies  91  and  92 . Therefore, the connecting bodies  91  and  92  can be provided between the support body  2  and the movable body  6  without using the case  3 . Therefore, since the connecting bodies  91  and  92  can be provided in the middle of assembly in which the case  3  is not yet provided, vibration characteristics including damper characteristics can be measured during manufacturing. Since the case  3  is not used for providing the connecting bodies  91  and  92 , the connecting bodies  91  and  92  can be provided in actuators not including the case  3 . 
     The connecting bodies  91  and  92  are provided in positions facing the support body  2  and the movable body  6  in the first direction Z which intersects with the second direction X (vibration direction). Therefore, when the movable body  6  vibrates in the second direction X, the movable body  6  deforms in the shear direction to prevent resonance. Therefore, even when the movable body  6  vibrates in the second direction X, a change in elastic modulus of the connecting bodies  91  and  92  is small, so the resonance of the movable body  6  can be effectively suppressed. 
     The connecting bodies (connecting bodies  91  and  92 ) are viscoelastic members (plate-like gel members), and have linear or non-linear stretching characteristics, depending on the stretching direction. For example, when pressed in the thickness direction (axial direction) for compressive deformation, the connecting bodies  91  and  92  demonstrate the stretching characteristics in which the non-linear component is greater than the linear component (spring coefficient). On the contrary, when stretched by being pulled in the thickness direction (axial direction), the connecting bodies  91  and  92  demonstrate the stretching characteristics in which the linear component (spring coefficient) is greater than the non-linear component (spring coefficient). Further, when deformed in the direction (shear direction) which intersects with the thickness direction (axial direction), deformation of the connecting bodies  91  and  92  is caused when stretched by being pulled whichever direction they are moved. Therefore, the connecting bodies  91  and  92  demonstrate the deformation characteristics in which the linear component (spring coefficient) is greater than the non-linear component (spring coefficient). In the present embodiment, when the movable body  6  vibrates in the second direction X, the connecting bodies  91  and  92  are deformed in the shear direction. Therefore, in the connecting bodies  91  and  92 , when the movable body  6  vibrates in the second direction X, the spring force in the movement direction becomes constant. Thus, by using spring elements in the shear direction of the connecting bodies  91  and  92 , reproducibility of vibration acceleration with respect to input signals can be improved, so vibrations with subtle nuances can be implemented. 
     Both surfaces of the connecting bodies  91  and  92  in the first direction Z are connected to the movable body  6  and the support body  2  by adhesion or the like, respectively. Therefore, since the connecting bodies  91  and  92  reliably follow the movement of the movable body  6 , resonance of the movable body  6  can be effectively inhibited. 
     Further, the connecting bodies  91  and  92  are compressed in the first direction Z between the support body  2  and the movable body  6 . Therefore, since the connecting bodies  91  and  92  reliably follow the movement of the movable body  6 , resonance of the movable body  6  can be effectively inhibited. 
     (Configuration of Abutting Portion) 
     In the present embodiment, an abutting portion is provided that defines a movable range of the movable body  6  when the movable body  6  is moved in the second direction X and the third direction Y due to an impact from the outside. More specifically, in the movable body  6 , the flat plate parts  811  and  821  of the first yoke  81  and the second yoke  82  face the inner surfaces  414   s ,  415   s ,  418   s , and  419   s  of the side plate parts  414 ,  415 ,  418 , and  419  in the second direction X. The inner surfaces  414   s ,  415   s ,  418   s  and  419   s  of the side plate parts  414 ,  415 ,  418 , and  419  are a first abutting portion that comes into contacts with the movable body  6  and defines a movable range of the movable body  6  when the movable body  6  is moved in the second direction X due to external impact. 
     In the movable body  6 , the pair of connecting portions  812  of the first yoke  81  and the pair of projecting portions  822  of the second yoke  82  are positioned between the side plate part  414  and the side plate part  418  which are separated in the third direction Yin the coil holder  4 , and between the side plate part  415  and the side plate part  419  which are separated in the third direction Y. Accordingly, the end portions  414   g  and  418   g  facing each other in the side plate part  414  and the side plate part  418  and the end portions  415   g  and  419   g  facing each other in the side plate part  415  and the side plate part  419  are a second abutting portion that comes into contact with the movable body  6  and defines a movable range of the movable body  6  when moved in the third direction Y. 
     (Configuration of Power Supply Board  10 ) 
       FIG. 7  is an explanatory diagram of a fixing structure of the power supply board  10  in the actuator  1  illustrated in  FIG. 1 .  FIG. 8  is an explanatory diagram of slits  414   t  and  415   t  that hold the power supply board  10 . 
     As illustrated in  FIG. 1  and  FIG. 3 , in the actuator  1 , the power supply board  10  is held in a position separated from the abutting portions described above (inner surfaces  414   s ,  415   s ,  418   s , and  419   s  of the side plate parts  414 ,  415 ,  418 , and  419  and the end portions  414   g ,  415   g ,  418   g , and  419   g ) in the coil holder  4 . Coil wires  56  and  57  forming the coil  5  are connected to the power supply board  10  by soldering, etc. In the present embodiment, the power supply board  10  is a rigid board. 
     In the present embodiment, in the coil holder  4 , the power supply board  10  is held in an opening portion surrounded by the side plate parts  413 ,  414 , and  415  on the first side in the third direction Y. In the present embodiment, the coil wires  56  and  57  are drawn out of the coil  5  on the first side Y 1  in the third direction Y through two guide grooves  411   c  formed on a surface of the end portion  411  of the plate part  41  of the coil holder  4  on the second side Z 2  in the first direction Z, extends from the first side Z 1  to the second side Z 2  in the first direction Z, and is connected to the power supply board  10 . 
     In the present embodiment, in the coil holder  4 , a pair of slits  414   t  and  415   t  extending to the first side Z 1  in the first direction Z is formed in end portions  414   h  and  415   h  of the side plate parts  414  and  415  facing each other in the second direction X. Both end portions  10   a  and  10   b  of the power supply board  10  in the second direction X are fit inside the slits  414   t  and  415   t , respectively. Therefore, the power supply board  10  is held by the coil holder  4  along side plate parts  413 ,  414 , and  415  of the coil holder  4  at the position exposed from the case  3 . In the present embodiment, after the end portions  10   a  and  10   b  of the power supply board  10  are fit into the slits  414   t  and  415   t , the coil holder  4  and the power supply board  10  are fixed to each other with an adhesive to suppress vibration of the power supply board  10 . 
     In the present embodiment, the power supply board  10  includes a first plate part  11  in which two lands  16   a  and  16   b , to which the coil wires  56  and  57  are connected by soldering, are formed in positions separated in the second direction X, and two second plate parts  12  and  13  protruding from both ends of the first plate part  11  in the second direction X to the first side Z 1  in the first direction Z. Two lands  17   a  and  17   b  are formed on both sides of the lands  16   a  and  16   b  in the first plate part  11 , and a wiring member (not illustrated) from the outside is connected to the lands  17   a  and  17   b.    
     At the end portion  411  of the coil holder  4 , contact portions  411   r  are formed in positions passing through end portions of the guide grooves  411   c  on the first side Y 1  in the third direction Y. The contact portions  411   r  receive an edge of the first plate part  11  of the power supply board  10  on the first side Z 1  in the first direction Z. Both the end portions  10   a  and  10   b  of the power supply board  10  are fit into the slits  414   t  and  415   t  to a depth position in which the first plate part  11  of the power supply board  10  is in contact with the contact portion  411   r . At an end of the first plate part  11  on the second side Z 2  in the first direction Z, two recessed parts  11   a  and  11   b  that hold distal ends of the coil wires  56  and  57  when the coil wires  56  and  57  are to be connected to the power supply board  10  are formed. 
     Here, the widths of the slits  414   t  and  415   t  are decreased from the middle in the depth direction (first direction Z). Therefore, when the both end portions  10   a  and  10   b  are inserted in the slits  414   t  and  415   t , the power supply board  10  is being held by the slits  414   t  and  415   t  even in the middle position until the first plate part  11  comes into contact with the contact portion  411   r.    
     Here, the coil wires  56  and  57  are appropriately slackened from the coil  5  to the lands  16   a  and  16   b  (connecting position) of the power supply board  10 . However, when the power supply board  10  is moved to a depth position from the contact portion  411   r  away to the second side Z 2  in the first direction Z while the power supply board  10  being fit in the slits  414   t  and  415   t , the coil wires  56  and  57  are made to tense. 
     As described above, in the present embodiment, since the power supply board  10  is held by the coil holder  4  covered with the case  3 , an impact on dropping hardly propagates to the power supply board  10  through the case  3 . Even when the impact on dropping propagates to the coil holder  4 , since the power supply board  10  is moved together with the coil holder  4 , the coil wires  56  and  57  are hardly pulled. Therefore, cut of the coil wires  56  and  57  by an impact on dropping hardly occurs, so drop impact resistance can be improved. 
     The power supply board  10  is provided along the side surface of the coil holder  4 . Therefore, an impact on dropping is hardly applied to the power supply board  10  directly, so cut of the coil wires  56  and  57  due to an impact on dropping hardly occurs. 
     Further, in the coil holder  4 , the power supply board  10  is provided at a position separated from the abutting portion with respect to the movable body  6  (inner surfaces  414   s ,  415   s ,  418   s , and  419   s  of the side plate parts  414 ,  415 ,  418 , and  419  (the first abutting portion), and end portions  414   g ,  415   g ,  418   g , and  419   g  of the side plate parts  414 ,  415 ,  418 , and  419  (the second abutting portion)). Therefore, even when the movable body  6  is moved due to an impact on dropping and the movable body  6  hits the abutting portion of the coil holder  4 , the impact at that time hardly propagates to the power supply board  10 . Thus, cut of the coil wires  56  and  57  due to an impact on dropping hardly occurs. 
     Further, the side surface of the coil holder  4  to which the power supply board  10  is fixed is located on the first side Y 1  in the third direction Y. Here, the short side portion  52  (ineffective side) of the coil  5  is positioned in the third direction Y. In the coil  5 , the coil wires  56  and  57  are drawn out of the short side portion  52  of the coil  5 . Accordingly, if the power supply board  10  is disposed on the side surface of the coil holder  4  located on the first side Y 1  in the third direction Y, a distance to which the coil wires  56  and  57  extend from the coil  5  to the power supply board  10  can be short. 
     The coil wires  56  and  57  extend from the first side Z 1  to the second side Z 2  in the first direction Z and are connected to the power supply board  10 . Both end portions  10   a  and  10   b  of the power supply board  10  are fit, from the second side Z 2  in the first direction Z, inside of the pair of slits  414   t  and  415   t  extending to the first side Z 1  in the first direction Z in positions in which the slits  414   t  and  415   t  face each other of the coil holder  4 . The power supply board  10  is fit into the slits  414   t  and  415   t  to a depth to come into contact with the contact portion  411   r  provided in the coil holder  4  from the second side Z 2  in the first direction Z, and is positioned on the furthermost part of the first side Z 1  in the first direction Z. Therefore, it is possible to easily provide appropriate slackness to the coil wires  56  and  57  extending from the first side Z 1  to the second side Z 2  in the first direction Z. Accordingly, when a temperature change occurs, even if the coil wires  56  and  57  are pulled due to a difference in thermal expansion coefficient between the coil wires  56  and  57  and peripheral members, etc., the coil wires  56  and  57  are hardly cut. Therefore, an operating temperature range of the actuator  1  can be expanded. 
     (Operation) 
     In the actuator  1  of the present embodiment, when power is supplied from outside (higher-level device) to the coil  5  via the power supply board  10 , the magnetic driving circuit  1   a  including the coil  5 , the first permanent magnet  71 , and the second permanent magnet  72  makes the movable body  6  reciprocate in the second direction X. Therefore, the user who holds the actuator  1  in the hand can obtain information by vibration from the actuator  1 . At that time, a frequency of a signal waveform applied to the coil  5  is changed depending on the information to be transmitted. Further, the polarity of the signal waveform applied to the coil  5  is reversed. At that time, a change in voltage between a period in which the polarity of the driving signal is negative and a period in which the polarity of the driving signal is positive is varied in speed. Thus, a difference arises between acceleration when the movable body  6  is moved to the first side X 1  in the second direction X and acceleration when the movable body  6  is moved to the second side X 2  in the second direction X. Therefore, it is possible to provide the user with an illusion that the actuator  1  is moved to the first side X 1  or the second side X 2  in the second direction X. 
     (Method for Manufacturing Actuator  1 ) 
       FIG. 9  is an explanatory diagram of a step of fixing the coil  5  to the coil holder  4  in a manufacturing process of the actuator  1  illustrated in  FIG. 1 .  FIG. 10  is a plan view of a step of fixing the coil  5  to the coil holder  4  illustrated in  FIG. 5 .  FIG. 11A  and  FIG. 11B  are explanatory diagrams of a step of fixing the power supply board  10  to the coil holder  4  illustrated in  FIG. 5 . 
     In manufacturing the actuator  1 , first, as illustrated in  FIG. 9  and  FIG. 10 , the first plate  47  is disposed so as to overlap the coil placement hole  410  and the plate part  41  of the coil holder  4  from the first side Z 1  in the first direction Z. At that time, the first protruding portion  472  is inserted to engage the first holding portions  414   a ,  415   a ,  418   a , and  419   a  of the side plate parts  414 ,  415 ,  418 , and  419 . Therefore, the first plate  47  is held by the coil holder  4  while closing the coil placement hole  410  from the first side Z 1  in the first direction Z. Next, as illustrated in  FIG. 9  and  FIG. 10 , the coil  5  is placed in the coil placement hole  410 . 
     In this state, as illustrated in  FIG. 7 , the power supply board  10  is fixed to the coil  5 . In the present embodiment, as illustrated in  FIG. 11A , the end portions  10   a  and  10   b  of the power supply board  10  are fit into the slits  414   t  and  415   t  of the coil holder  4  from the second side Z 2  in the first direction Z. At that time, insertion of the power supply board  10  is stopped in a position halfway before the power supply board  10  comes into contact with the contact portion  411   r  of the coil holder  4  from the second side Z 2  in the first direction Z. Therefore, the power supply board  10  is separated apart from the contact portion  411   r.    
     In this state, the coil wires  56  and  57  are drawn from the first side Z 1  in the first direction Z to the second side Z 2 , and connected to the lands  16   a  and  16   b  of the power supply board  10  by soldering. At that time, the coil wires  56  and  57  are made to pass through the recessed parts  11   a  and  11   b  to position the coil wires  56  and  57 . After connecting the coil wires  56  and  57  to the power supply board  10 , excessive portions of the coil wires  56  and  57  on the distal end side are cut and removed. 
     Thereafter, the power supply board  10  is pressed into the slits  414   t  and  415   t  to a depth at which the power supply board  10  comes into contact with the contact portion  411   r  from the second side Z 2  in the first direction Z. Thus, appropriate slackness is provided to the coil wires  56  and  57  between the coil  5  to the lands  16   a  and  16   b  (connecting position) of the power supply board  10 . In the present embodiment, the power supply board  10  is pressed into the slits  414   t  and  415   t  to a depth at which the power supply board  10  comes into contact with the contact portion  411   r  from the second side Z 2  in the first direction Z. Thereafter, the power supply board  10  is fixed to the coil holder  4  with an adhesive  90 . 
     Here, since the widths of the slits  414   t  and  415   t  are decreased from the middle in the depth direction, when the power supply board  10  is inserted to the position in which the widths of the slits  414   t  and  415   t  are decreased, the power supply board  10  is temporarily fixed to the slits  414   t  and  415   t . Therefore, when the power supply board  10  is pushed deeper into the slits  414   t  and  415   t  after connecting the coil wires  56  and  57  to the temporarily fixed power supply board  10 , the coil wires  56  and  57  can be slackened. Further, by merely optimizing the position of the power supply board  10  when connecting the coil wires  56  and  57 , it is possible to optimize the slackness to be provided to the coil wires  56  and  57 . 
     Next, as illustrated in  FIG. 9  and  FIG. 10 , after the air-core portion  50  of the coil  5  is filled with the adhesive, the second plate  48  is disposed so as to overlap the coil placement hole  410  and the plate part  41  of the coil holder  4  from the second side Z 2  in the first direction Z. At that time, the second protruding portions  482  are inserted to engage the second holding portions  414   b ,  415   b ,  418   b , and  419   b  of the side plate parts  414 ,  415 ,  418 , and  419 . Therefore, the second plate  48  is held by the coil holder  4  in a state in which the second plate  48  overlaps the coil  5  from the second side Z 2  in the first direction Z. On the first side Z 1  in the first direction Z with respect to the coil  5 , the adhesive  90  flows between the coil  5  and the first plate  47 , and flows into a gap between the first plate  47  and the plate part  41  of the coil holder  4 . At that time, an excessive adhesive  90  flows into the recessed part  412   a  or the like formed on the surface of the end portions  411  and  412  of the plate part  41  on the first side Z 1  in the first direction Z. On the second side Z 2  in the first direction Z with respect to the coil  5 , the adhesive  90  flows between the coil  5  and the second plate  48 , and flows into a gap between the second plate  48  and the plate part  41  of the coil holder  4 . At that time, an excessive adhesive  90  flows into the recessed parts  411   b  and  412   b  or the like formed on the surface of the end portions  411  and  412  of the plate part  41  on the second side Z 2  in the first direction Z. 
     Therefore, when the adhesive  90  is cured, the coil  5  is fixed to the first plate  47  and the plate part  41  of the coil holder  4  by the adhesive layer  9  in which the adhesive  90  is cured. The first plate  47  is fixed to the plate part  41  of the coil holder  4  by the adhesive layer  9 . The coil  5  is fixed to the first plate  47  by the adhesive layer  9 , and the second plate  48  is fixed to the plate part  41  of the coil holder  4  by the adhesive layer  9 . 
     Next, the connecting bodies  91  are made to adhere to two positions separated in the third direction Y on the surface of the first plate  47  on the first side Z 1  in the first direction Z, and the connecting bodies  92  are made to adhere to two positions separated in the third direction Y on the surface of the second plate  48  on the second side Z 2  in the first direction Z. 
     Next, the first yoke  81  to which the first permanent magnet  71  is fixed is disposed on the first side Z 1  in the first direction Z with respect to the first plate  47 , the second yoke  82  to which the second permanent magnet  72  is fixed is disposed on the second side Z 2  in the first direction Z with respect to the second plate  48 . End portions of the connecting portions  812  of the first yoke  81  are connected to the projecting portions  822  of the second yoke  82  by welding or the like. At that time, the connecting bodies  91  are made to adhere to the first yoke  81 , and the connecting bodies  92  are made to adhere to the second yoke  82 . 
     Next, after placing the first case member  31  so as to cover the coil holder  4  and the movable body  6  from the first side Z 1  in the first direction Z, the second case member  32  is placed so as to cover the coil holder  4  and the movable body  6  from the second side Z 2  in the first direction Z, and the engagement holes  321   d  formed in the side plate part  321  of the second case member  32  are made to engage the engagement protruding portions  414   d ,  418   d , etc. of the coil holder  4 . Thereafter, the first case member  31  and the second case member  32  are coupled by welding or the like to form the case  3 . 
     Other Embodiments 
     In the embodiment described above, the permanent magnets (first permanent magnet  71  and second permanent magnet  72 ) are provided on both sides of the coil  5  in the first direction Z. However, at least an embodiment of the present invention is applicable also to an actuator in which a permanent magnet is disposed on one of the first and second sides in the first direction Z of the coils  5 . 
     In the embodiment described above, the coil holder  4  and the coil  5  are provided in the support body  2 , and the permanent magnets (the first permanent magnet  71  and the second permanent magnet  72 ) and the yokes (first yoke  81  and second yoke  82 ) are provided in the movable body  6 . However, the configuration using the first plate  47  and the second plate  48  and the configuration for providing slackness in the power supply board  10  may be applied to an actuator in which the coil holder  4  and the coil  5  are provided in the movable body  6 , and the permanent magnets (first permanent magnet  71  and second permanent magnet  72 ) and the yokes (first yoke  81  and second yoke  82 ) are provided in the support body  2 . 
     In the embodiment described above, a gel member (viscoelastic member) is used as the connecting bodies  91  and  92 , but rubber, a spring or the like may be used alternatively. Here, viscoelasticity is the property of materials that have both viscosity and elasticity. Many polymer materials, such as gel members, plastics, and rubber, have viscoelasticity. Accordingly, as the connecting bodies  91  and  92  having viscoelasticity, various rubber materials, such as natural rubber, diene rubber (e.g., styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, and acrylonitrile-butadiene rubber), non-diene rubber (e.g., butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and fluororubber), and thermoplastic elastomers, and modified materials thereof may be used. 
     While the description above refers to particular embodiments of the present invention, it will be understood that many modifications may be made without departing from the spirit thereof. The accompanying claims are intended to cover such modifications as would fall within the true scope and spirit of the present invention. 
     The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.