JP2019013089A - Actuator - Google Patents

Abstract

To provide an actuator capable of having a proper gravity to a movable body 3 with a weight.SOLUTION: In an actuator 1 that vibrates a movable body 3 by a magnetize driving circuit 6 to a support body 2, the movable body 3 comprises: a yoke 30 to which a magnet 8 is fixed; and a weight 40 which is fixed to a space of an inner side of the yoke 30. The yoke 30 has a three-step structure, and a first weight 41 is arranged between a first plate part 311 and a second plate part 321 of the yoke 30 and a second weight 42 is arranged between the second plate part 321 and a third plate part 331 of the yoke 30. The first and second weights 41 and 42 are fixed to the yoke 30 with a revet 43.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an actuator that generates various vibrations.

  Actuator that vibrates a movable body in a second direction intersecting the first direction with respect to a support by a magnetic drive circuit having a coil and a magnet opposed in the first direction as a device that generates vibration by a magnetic drive mechanism Has been proposed (see Patent Document 1). In the actuator described in Patent Document 1, a magnet is provided on one of a support and a movable body, and the magnet is held by a yoke made of a magnetic plate.

JP 2006-127789 A

  In an actuator that vibrates a movable body with a magnetic drive circuit, it is necessary to increase the weight of the movable body in order to increase the vibration experienced by the user. However, in this type of actuator, conventionally, since the movable body is thin and most of the movable body is resin, it is difficult to ensure the weight of the movable body. In view of this, it has been studied to provide a magnet for a magnetic drive circuit and a yoke for holding the magnet on the movable body, and to secure the weight by increasing the thickness of the yoke. However, when securing the weight by increasing the thickness of the yoke, redesign is necessary to change the weight after the design is completed, and the weight cannot be easily changed.

  As a method of increasing the weight of the movable body, there is a method of adding a weight to the movable body. For example, in Embodiment 1 of Patent Document 1, the yoke is provided on the support side, but the movable body includes weights fixed to both surfaces of a plate-like member that holds the coil. However, in this embodiment, since the weight is fixed to the outer surface of the movable body, it is necessary to secure a space for attaching the weight to the outside of the movable body, and there is a possibility that a design change may be required due to a change in the weight of the weight. Therefore, it may not be easy to attach a weight having an appropriate weight.

  In view of the above problems, an object of the present invention is to provide an actuator capable of easily attaching a weight having an appropriate weight.

  In order to solve the above problems, an actuator to which the present invention is applied includes a support, a movable body supported by the support so as to be movable, and a magnetic drive circuit that moves the movable body relative to the support. And the magnetic drive circuit includes: a first coil provided on the support; and a first magnet provided on the movable body and facing the coil in a first direction; A first plate portion that drives a body in a second direction intersecting the first direction, and the movable body is disposed on one side of the first direction with respect to the first coil and the first magnet; And a yoke provided with a second plate portion disposed on the other side in the first direction with respect to the first coil and the first magnet, and a weight fixed to the yoke. Is disposed between the first plate portion and the second portion. It is characterized in.

In the present invention, the movable body includes a first magnet, a yoke to which the first magnet is fixed, and a weight fixed to the yoke. The yoke includes a first plate portion disposed on one side in the first direction with respect to the first magnet and the first coil, and a second plate portion disposed on the other side. It arrange | positions between the board part and the 2nd part. As described above, when the weight is increased by attaching the weight to the yoke, it is not necessary to change the design of the yoke in order to increase the weight of the movable body. Further, since the weight is attached between the first plate portion and the second plate portion, the weight can be attached to the inside of the movable body using the space between the yokes, and the influence on the outer shape of the movable body is small. Therefore, it is possible to easily attach a weight having an appropriate weight and to secure an appropriate weight.

  In the present invention, the yoke includes a third plate portion disposed on the other side in the first direction with respect to the second plate portion, and the magnetic drive circuit is a second coil facing the first direction. And the second magnet, the second coil and the second magnet are disposed between the second plate portion and the third plate portion, and the weight is formed between the first plate portion and the second portion. It is possible to employ a configuration including a first weight disposed between and a second weight disposed between the second plate portion and the third plate portion. Thus, the first weight and the second weight can be attached between the yokes by forming the yoke in a three-stage structure. Therefore, the number of weights can be increased, and it is easy to secure the weight of the movable body. In addition, since the magnet and coil pairs are arranged in two stages and a three-stage yoke is provided so as to sandwich the magnet, the magnetic efficiency can be improved, and the driving force can be improved even if the thickness of the magnet is reduced. Can be secured.

  In the present invention, the first weight and the second weight are attached to the yoke by a rivet penetrating the first plate portion, the first weight, the second plate portion, the second weight, and the third plate portion. It is preferably fixed. Thus, by using a rivet that penetrates the weight, the rivet itself can also be used as a weight. Also, positioning and fixing can be performed at once by rivets.

  In the present invention, the first coil and the first magnet are arranged in pairs on both sides of the first weight in the second direction, and the second coil and the second magnet are arranged on the second weight. One set is preferably arranged on each side of the second direction. With such an arrangement, the weight can be arranged at the center of the movable body. Therefore, there is little possibility that the center of gravity will fluctuate due to the addition of the weight, and there is little possibility that the driving balance of the actuator will be lost.

  In the present invention, it is preferable that the first magnet is fixed to the first plate portion, and the second magnet is fixed to the third plate portion. If it does in this way, since the 1st magnet and the 2nd magnet are arranged symmetrically in the 1st direction centering on the 2nd plate part, the arrangement with good balance is realizable.

  In the present invention, the support includes a first holder and a second holder that comes into contact with the first holder from the other side in the first direction, and the first weight is disposed on the first holder. A first weight disposition hole and a first coil holding hole for disposing the first coil are formed, and the second holder includes a second weight disposition hole for disposing the second weight and the second coil. A second coil holding hole is formed, and the first weight and the second weight collide with an inner peripheral surface of the first weight arrangement hole and an inner peripheral surface of the second weight arrangement hole, respectively. It is preferable to restrict the movable range of the movable body in the second direction. If it does in this way, the stopper mechanism which controls the movable range of a movable body using a weight can be provided. Therefore, the impact resistance of the actuator can be improved.

In the present invention, the first holder and the second holder include a through hole that penetrates a portion that contacts the first direction in the first direction, and are coupled by a positioning pin that passes through the through hole. Is preferred. If it does in this way, a 1st holder and a 2nd holder can be positioned and combined in the direction which intersects the 1st direction using a positioning pin. Moreover, since the first holder and the second holder can be assembled without using an adhesive, the number of bonding steps can be reduced.

  In the present invention, the yoke includes a first yoke having the first plate portion, a second yoke having the second plate portion, and a third yoke having the third plate portion, The first yoke extends from the first plate portion toward the other side in the first direction to a position overlapping the second yoke and is connected to the second yoke; and Extending from the first plate portion to the other side in the first direction on the opposite side of the first magnet and the first coil from the first connecting plate portion to a position overlapping the second yoke. A second connecting plate portion connected to the second yoke, and the third yoke extends from the third plate portion toward one side in the first direction to a position overlapping the second yoke. The third connecting plate portion connected to the second yoke, the second magnet, and the second coil A fourth connecting plate portion that extends from the third plate portion to one side in the first direction on the opposite side of the first connecting plate portion to a position overlapping the second yoke and is connected to the second yoke. The first connecting plate portion and the second connecting plate portion collide with the inner peripheral surface of the opening formed in the first holder, and the movable body is movable in the second direction. The range is restricted, and the third connecting plate portion and the fourth connecting plate portion collide with the inner peripheral surface of the opening formed in the second holder, and the movable body is movable in the second direction. It is preferable to regulate the range. If it does in this way, it can surround and protect the both sides of a coil and a magnet in the 2nd direction with a yoke. In addition, since the second stopper mechanism can be provided between the yoke and the support body, the impact resistance of the actuator can be improved.

  In the present invention, the support body includes a first cover member that contacts the first holder from one side in the first direction, and a first cover member that contacts the second holder from the other side in the first direction. It is preferable that a two-cover member and a cylindrical case that surrounds an outer peripheral side of the first cover member, the first holder, the second holder, and the second cover member are provided. If it does in this way, since the cylindrical case can prevent that the member which comprises a support body spreads, it is not necessary to fix the member which comprises a support body with an adhesive agent. Therefore, the bonding process can be reduced.

  In the present invention, the first plate portion is disposed between the first cover member and the first holder, and the third plate portion is disposed between the second cover member and the second holder, It is preferable that a viscoelastic member is disposed between the first cover member and the first plate portion and between the second cover member and the third plate portion. For example, the viscoelastic member is preferably a gel damper member. If it does in this way, the resonance at the time of vibrating a movable body can be suppressed with a viscoelastic member. Further, since the deformation in the shear direction of the viscoelastic member is a deformation in the direction in which the viscoelastic member is stretched, the linear component (spring coefficient) is larger than the nonlinear component (spring coefficient). Therefore, in the viscoelastic member, the spring force according to the moving direction is constant. Therefore, in the present invention, when the movable body is vibrated, by using the spring element in the shear direction of the viscoelastic member, the reproducibility of the vibration acceleration with respect to the input signal can be improved, and the vibration is realized with a subtle nuance. can do. On the other hand, when the viscoelastic member is compressed in the thickness direction (axial direction) between the movable body and the support body, the nonlinear component (spring coefficient) is larger than the linear component (spring coefficient). It has elastic properties. Therefore, since the viscoelastic member can be prevented from being greatly deformed in the direction orthogonal to the driving direction of the movable body, the gap between the movable body and the support body can be prevented from greatly changing.

  In this invention, the said 1st cover member is provided with the 1st convex part which protrudes toward the said 1st board part from the surface where the said viscoelastic member is connected, The said 2nd cover member is the said viscoelastic member. It is preferable to provide the 2nd convex part which protrudes toward the said 3rd board part from the surface connected. If it does in this way, the amount of crushing of the 1st direction of a viscoelastic member can be controlled.

  According to the present invention, the movable body includes the first magnet, the yoke to which the first magnet is fixed, and the weight fixed to the yoke. The yoke includes a first plate portion disposed on one side in the first direction with respect to the first magnet and the first coil, and a second plate portion disposed on the other side. It arrange | positions between the board part and the 2nd part. As described above, when the weight is increased by attaching the weight to the yoke, it is not necessary to change the design of the yoke in order to increase the weight of the movable body. Further, since the weight is attached between the first plate portion and the second plate portion, the weight can be attached to the inside of the movable body using the space between the yokes, and the influence on the outer shape of the movable body is small. Therefore, it is possible to easily attach a weight having an appropriate weight and to secure an appropriate weight.

It is a perspective view of an actuator concerning an embodiment of the present invention. It is a cross-sectional perspective view of the actuator shown in FIG. It is a disassembled perspective view of the actuator shown in FIG. It is a partial expanded sectional view of the actuator which removed the wiring board. It is explanatory drawing which shows the holding structure of a wiring board typically. It is a disassembled perspective view of a movable body, a holder, a magnetic drive circuit, and a wiring board. It is a top view of the actuator which removed the cylindrical case and the 2nd cover member.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, three directions intersecting each other will be described as a first direction Z, a second direction X, and a third direction Y, respectively. Further, the first direction Z, the second direction X, and the third direction Y are directions orthogonal to each other. Moreover, X1 is attached to one side of the second direction X, X2 is attached to the other side of the second direction X, Y1 is attached to one side of the third direction Y, and Y2 is attached to the other side of the third direction Y. And Z1 is attached to one side of the first direction Z, and Z2 is attached to the other side of the first direction Z.

(overall structure)
FIG. 1 is a perspective view of an actuator 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view of the actuator 1 shown in FIG. 1, and is a cross-sectional perspective view cut along the XZ plane. FIG. 3 is an exploded perspective view of the actuator shown in FIG. As shown in FIGS. 1 and 2, the actuator 1 as a whole has a rectangular parallelepiped shape in which the dimension in the second direction X is larger than the dimension in the third direction Y. As shown in FIG. 2, the actuator 1 includes a support 2, a movable body 3 that is movably supported by the support 2, and a magnetic drive circuit 6 that moves the movable body 3 relative to the support 2. The magnetic drive circuit 6 vibrates the movable body 3 in the second direction X. The magnetic drive circuit 6 includes a coil 7 and a magnet 8 that face each other in the first direction Z. In this embodiment, the coil 7 is provided on the support 2 side, and the magnet 8 is provided on the movable body 3 side.

(Support)
The support 2 includes a rectangular tubular case 4, a cover 11 and a holder 60 that are held inside the tubular case 4, and the movable body 3 and magnetic drive are provided inside the support 2. A circuit 6 is arranged (see FIG. 2). As shown in FIG. 3, the cover 11 includes a first cover member 16 located on one side Z1 in the first direction Z and a second cover that overlaps the first cover member 16 from the other side Z2 in the first direction Z. The first cover member 16 and the second cover member 17 have a quadrangular planar shape. Between the first cover member 16 and the second cover member 17, a holder 60 having a quadrangular planar shape is disposed. When viewed from the first direction Z, the first cover member 16, the holder 60, and the second cover member 17 have a shape in which the width in the second direction X is wider than the width in the third direction Y. As shown in FIG. 1, a wiring board 15 connected to the coil 7 of the magnetic drive circuit 6 is attached to the side surface 2 </ b> A (see FIG. 1) on one side in the second direction X of the support 2. The side surface 2 </ b> A of the support body 2 includes an end portion 160 on one side X <b> 1 in the second direction X of the first cover member 16, an end portion 600 on one side X <b> 1 in the second direction X of the holder 60, and the second cover member 17. An end 170 on one side X1 in the second direction X is formed.

(Tubular case)
As shown in FIGS. 1 and 2, the first cover member 16, the holder 60, and the second cover member 17 are stacked in the first direction Z, and the outer peripheral edges on both sides in the third direction Y of each member are in the first direction. It overlaps with Z. The first cover member 16, the holder 60 and the second cover member 17 are held by the cylindrical case 4. In this embodiment, the cylindrical case 4 is made of a metal plate such as stainless steel, and includes two members, a first case 410 and a second case 420, as shown in FIG. The cylindrical case 4 may be made of resin. The first case 410 and the second case 420 are joined in a cylindrical shape.

  The first case 410 includes a first plate part 411 extending in a first direction Z that is a stacking direction of the first cover member 16, the holder 60, and the second cover member 17, and a first direction Z of the first plate part 411. A second plate portion 412 that bends substantially perpendicularly from the end of one side Z1 of the first cover member 16 and extends in the third direction Y along the outer surface of the first cover member 16, and a third direction Y of the second plate portion 412. A third plate portion 413 rising from the edge of the other side Y2 to the other side Z2 in the first direction Z is provided. The second case 420 is bent at a substantially right angle from the fourth plate portion 421 extending in the first direction Z and the end portion of the other side Z2 of the fourth plate portion 421 in the first direction Z. A fifth plate portion 422 extending in the third direction Y along the outer surface of the member 17, and rises from the edge of one side Y1 in the third direction Y of the fifth plate portion 422 to one side Z1 in the first direction Z. A sixth plate portion 423 is provided. The third plate portion 413 is joined to the fourth plate portion 421, and the first plate portion 411 is joined to the sixth plate portion 423. A leaf spring portion 430 is formed on the second plate portion 412 and the fifth plate portion 422, and the first cover member 16 and the second cover member 17 respectively overlap the leaf spring portion 430 when viewed in the first direction Z. A rectangular recess is formed at the position.

(First cover member and second cover member)
As shown in FIGS. 2 and 3, the first cover member 16 is formed with a recess 165 that opens toward the other side Z <b> 2 in the first direction Z. In the first cover member 16, the concave portion 165 includes a first wall portion 161 located on one side X1 in the second direction X, a second wall portion 162 located on the other side X2 in the second direction X, and a third direction. It is surrounded by a third wall portion 163 located on one side Y1 of Y and a fourth wall portion 164 located on the other side Y2 in the third direction Y. The first cover member 16 is formed with a positioning recess 16 a that opens toward the other side Z <b> 2 in the first direction Z at both ends of the first wall portion 161. In addition, positioning convex portions 16 b that protrude toward the other side Z <b> 2 in the first direction Z are formed at both ends of the second wall portion 162. The concave portion 16a and the convex portion 16b are fitted with the concave portion 60b and the convex portion 60a provided in the holder 60 at positions facing the concave portion 16a and the convex portion 16b. Accordingly, the first cover member 16 is positioned in a direction intersecting the first direction Z with respect to the holder 60.

The second cover member 17 is disposed by turning over a member having the same shape as the first cover member 16 in the first direction Z. The second cover member 17 is formed with a recess 175 that opens toward one side Z1 in the first direction Z (see FIG. 2). As shown in FIGS. 2 and 3, in the second cover member 17, the recess 175 is located on the first wall 171 located on one side X <b> 1 in the second direction X and on the other side X <b> 2 in the second direction X. It is surrounded by the second wall portion 172, the third wall portion 173 located on one side Y1 in the third direction Y, and the fourth wall portion 174 located on the other side Y2 in the third direction Y. The second cover member 17 is formed with positioning recesses (not shown) that open toward one side Z <b> 1 in the first direction Z at both ends of the first wall portion 171. In addition, positioning protrusions (not shown) protruding toward one side in the first direction Z are formed at both ends of the second wall portion 172. Similar to the recesses 16 a and the projections 16 b of the first cover member 16, these are fitted with the recesses 60 b and the projections 60 a provided at corresponding positions of the holder 60 when the support body 2 is assembled. Accordingly, the second cover member 17 is positioned in a direction intersecting the first direction Z with respect to the holder 60.

  As shown in FIG. 3, a rib 166 extending in the third direction Y is formed at the center in the second direction X of the recess 165 of the first cover member 16. First protrusions 167 that protrude to the other side Z <b> 2 in the first direction Z are formed at both ends and the center in the third direction Y of the rib 166. Similarly, a rib 176 extending in the third direction Y is formed in the center of the recess 175 of the second cover member 17 in the second direction X, and the rib 176 is formed at both ends and the center in the third direction Y. Is formed with a second convex portion 177 projecting to the other side Z2 in the first direction Z (see FIG. 2). As shown in FIGS. 2 and 3, the viscoelastic members 9 are disposed in the recess 165 of the first cover member 16 at two locations on both sides in the second direction X of the rib 166. Similarly, in the concave portion 175 of the second cover member 17, the viscoelastic members 9 are disposed at two locations on both sides in the second direction X of the rib 176.

(Viscoelastic member)
Inside the support body 2, the movable body 3 is assembled to the holder 60 so as to be movable in the second direction X, and is disposed between the first cover member 16 and the second cover member 17. The viscoelastic member 9 is disposed at a portion where the first cover member 16 and the movable body 3 face each other in the first direction Z, and at a portion where the second cover member 17 and the movable body 3 face each other in the first direction Z. . One surface of the viscoelastic member 9 is connected to the bottom surface of the recess 165 or the recess 175 by an adhesive, and the other surface is connected to the movable body 3 by an adhesive. Therefore, the movable body 3 and the support body 2 are connected by the viscoelastic member 9. As will be described later, the movable body 3 includes a first plate portion 311 facing the first cover member 16 in the first direction Z, and a third plate portion 331 corresponding to the second cover member 17 and the first direction Z. The viscoelastic member 9 having the yoke 30 provided and disposed between the first cover member 16 and the movable body 3 is connected to the first plate portion 311 of the yoke 30, and the second cover member 17. The viscoelastic member 9 disposed between the movable body 3 and the third plate portion 331 of the yoke 30 is connected.

  The viscoelastic member 9 is disposed in a compressed state in the first direction Z between the bottom surface of the recess 165 and the movable body 3 and between the bottom surface of the recess 175 and the movable body 3. In this embodiment, the viscoelastic member 9 is disposed such that the first direction Z is the thickness direction (axial direction) and the second direction intersecting the first direction Z is the shear direction. The 1st convex part 167 formed in the 1st cover member 16 and the 2nd convex part 177 formed in the 2nd cover member 17 serve as a stopper which controls the amount of crushing of viscoelastic member 9 in the 1st direction Z. Function.

Here, viscoelasticity is a property that combines both viscosity and elasticity, and is a property that is remarkably seen in polymer materials such as gel-like members, plastics, and rubbers. Therefore, various gel-like members can be used as the viscoelastic member 9. Further, as the viscoelastic member 9, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber), chloroprene rubber, acrylonitrile / butadiene rubber, etc., non-diene rubber (for example, butyl rubber, ethylene Propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluorine rubber, etc.), various rubber materials such as thermoplastic elastomers, and modified materials thereof may be used. In this embodiment, the viscoelastic member 9 is a silicone gel having a penetration of 10 degrees to 110 degrees. The penetration is defined by JIS-K-2207 or JIS-K-2220, and the smaller this value is, the harder it is. The viscoelastic member 9 has linear or non-linear expansion / contraction characteristics depending on the expansion / contraction direction. For example, when the viscoelastic member 9 is pressed in the thickness direction (axial direction) and compressively deformed, the viscoelastic member 9 has an expansion / contraction characteristic in which a nonlinear component (spring coefficient) is larger than a linear component (spring coefficient). On the other hand, when stretched by being pulled in the thickness direction (axial direction), a linear component (non-linear component (spring coefficient)) (
It has elastic characteristics with a large spring coefficient. On the other hand, when the viscoelastic member 9 is deformed in the direction (shear direction) intersecting the thickness direction (axial direction) as in this embodiment, it is a deformation in the direction of being pulled and extended regardless of the direction of movement. For this reason, the linear component (spring coefficient) is larger than the nonlinear component (spring coefficient). Therefore, in the viscoelastic member 9, the spring force according to the movement direction is constant. Therefore, by using the spring element in the shear direction of the viscoelastic member 9 as in this embodiment, the reproducibility of the vibration acceleration with respect to the input signal can be improved, so that vibration can be realized with a subtle nuance. it can.

(Wiring board holding structure)
A concave portion 168 that is recessed toward the other side X <b> 2 in the second direction X is formed at the end 160 on the one side X <b> 1 in the second direction X of the first cover member 16. Further, in the first substrate support wall 50 that rises from the inner surface of one side Z1 in the first direction Z of the recess 168 to the other side Z2 in the first direction Z, and in the other side Y2 of the first substrate support wall 50 in the third direction Y. A positioning projection 51 that projects to the other side Z2 in the first direction Z is formed. A first substrate holding groove 52 that opens toward the other side Z2 in the first direction Z is formed between the first substrate support wall 50 and the first wall portion 161.

  In addition, a concave portion 178 that is recessed toward the other side X2 of the second direction X is formed at the end portion 170 on the one side X1 in the second direction X of the second cover member 17, and the other side of the concave portion 178 in the first direction Z is formed. The second substrate support wall 53 rising from the inner surface of the side Z2 to the one side Y1 in the first direction Z, and the other side Z2 in the third direction Y of the second substrate support wall 53 protrudes to the other side Z2 in the first direction Z. A positioning protrusion 54 is formed. Between the second substrate support wall 53 and the first wall portion 171, a second substrate holding groove 55 that opens toward one side Z <b> 1 in the first direction Z is formed.

  As shown in FIG. 3, a concave portion 610 that is recessed on the other side X <b> 2 in the second direction X is formed on the end portion 600 on the one side X <b> 1 in the second direction X of the holder 60. The concave portion 610 is connected to the concave portion 168 of the first cover member 16 and the concave portion 178 of the second cover member 17, and the concave portion 168, the concave portion 610, and the concave portion 178 are rectangular substrates as a whole when viewed from the second direction X. An arrangement recess 56 (see FIGS. 1 and 2) is formed. The substrate placement recess 56 is formed on the side surface 2A on one side X1 of the support 2 in the second direction X, and the substrate placement recess 56 has a first side Z1 in the first direction Z and an inner surface on the other side on the first side Z1. A first substrate holding groove 52 and a second substrate holding groove 55 facing in the direction Z are formed. The wiring substrate 15 is disposed in the substrate placement recess 56, the end on one side Z1 in the first direction Z is inserted into the first substrate holding groove 52, and the end on the other side Z2 is inserted into the second substrate holding groove 55. By being inserted, it is held on the support 2. As shown in FIG. 3, the wiring board 15 has a notch 151 formed at a diagonal position. The notch 151 fits with the positioning projections 51 and 54 on the support 2 side when the wiring board 15 is placed in the board placement recess 56 in a state where the front and back sides of the wiring board 15 are correct.

  FIG. 4 is a partially enlarged cross-sectional view of the actuator 1 with the wiring board 15 removed. FIG. 5 is an explanatory diagram schematically showing a wiring board holding structure. As shown in FIGS. 4 and 5, the first substrate holding groove 52 and the second substrate holding groove 55 each include a first inner surface 57 and a second inner surface 58 that face the second direction X that is the groove width direction. . The first inner surface 57 located on one side X1 in the second direction X is a tapered surface inclined with respect to the groove depth direction (first direction Z), and the second inner surface located on the other side X2 in the second direction X. Reference numeral 58 denotes a surface extending in parallel with the groove depth direction (first direction Z).

As shown in FIGS. 4 and 5, the second inner surface 58 is provided at a position adjacent to the bottom surface 611 of the recess 610 formed in the end portion 600 of the holder 60 in the first direction Z, and the second inner surface 58 is There is a step between the bottom surface 611. The bottom surface 611 is located on one side X1 in the second direction X from the second inner surface 58. That is, in the end portion 600 of the holder 60, a portion (bottom surface 611) located between the first substrate holding groove 52 and the second substrate holding groove 55 is in the second direction X from the second inner surface 58.
It is in the position which protruded to one side X1.

  When the end portion of the wiring substrate 15 is inserted into the first substrate holding groove 52 and the second substrate holding groove 55, the end portion of the wiring substrate 15 is connected to the first side X1 in the second direction X from the first side X1 as shown in FIG. The first inner surface 57 comes into contact with the bottom surface 611 of the recess 610 from the other side X2 in the second direction X. That is, the bottom surface 611 is a substrate contact portion that contacts the wiring substrate 15 from the side opposite to the first inner surface 57, and the end portion of the wiring substrate 15 includes the first inner surface 57 (tapered surface) and the bottom surface 611 (substrate contact). Between them. Since the first inner surface 57 is a tapered surface, the wiring substrate 15 is slightly bent so as to be convex toward the one side X1 in the second direction X as a whole, and both ends are urged in a direction to eliminate this bending. As a result, the end of the wiring board 15 is pressed against the first inner surface 57 that is a tapered surface. As a result, the end portion of the wiring substrate 15 is held in the first substrate holding groove 52 and the second substrate holding groove 55 without rattling.

(Magnetic drive circuit)
The magnetic drive circuit 6 includes a coil 7 and a magnet 8 that faces the coil 7 in the first direction Z. As shown in FIG. 2, in the present embodiment, as the coil 7, two first coils 71 and 72 arranged in parallel in the second direction X, and the other of the first coils 71 and 72 in the first direction Z. Two second coils 73 and 74 arranged in parallel in the second direction X on the side Z2 are provided. The first coils 71 and 72 and the second coils 73 and 74 are arranged at positions that overlap when viewed from the first direction Z. Each coil 7 is an elliptical air-core coil in which the long side 701 (effective portion) extends in the third direction Y. The coil 7 is held by a holder 60 and provided on the support 2 side.

(holder)
FIG. 6 is an exploded perspective view of the movable body 3, the holder 60, the magnetic drive circuit 6, and the wiring board 15. 2 to 4, the holder 60 includes a first holder 61 and a second holder 62 that comes into contact with the first holder 61 from the other side Z2 in the first direction Z. The first holder 61 and the second holder 62 have the same shape, and are arranged in the first direction Z in the opposite directions. Hereinafter, the configuration of the first holder 61 will be described, and with respect to the second holder 62, the same reference numerals are given to the same configuration, and description thereof will be omitted.

  The first holder 61 includes a recess 63 that is recessed from the surface of the other side Z2 in the first direction to the one side Z1 of the first direction Z, and a surface of the one side Z1 of the first direction to the other side Z2 of the first direction Z. The recessed part 64 is provided and the part which comprises the bottom part of the recessed parts 63 and 64 is thin shape. In the thin-walled portion, a weight arrangement hole 65 is formed in the approximate center of the second direction X, and coil holding holes 66 are formed on both sides of the weight arrangement hole 65 in the second direction X. The coil holding hole 66 and the weight arrangement hole 65 are through holes, and receiving portions 67 are formed at both ends of each coil holding hole 66 in the third direction Y. When the coil 7 is mounted in the coil holding hole 66, the short side 702 (invalid portion) of the coil 7 is supported by the receiving portion 67. In this state, the coil 7 is fixed to the first holder 61 with an adhesive or the like.

  The first holder 61 includes an outer frame portion 68 that surrounds the outer peripheral sides of the recesses 63 and 64. The outer frame portion 68 is located on one side X1 in the second direction X, the other side X2 in the second direction X, the one side Y1 in the third direction Y, and the other side Y2 in the third direction Y with respect to the recess 63. A first outer frame portion 681, a second outer frame portion 682, a third outer frame portion 683, and a fourth outer frame portion 684 are provided. A first opening 601 is formed in the first holder 61 between the coil holding hole 66 on one side X1 in the second direction X and the first outer frame portion 681, and the coil on the other side X2 in the second direction X is formed. A second opening 602 is formed between the holding hole 66 and the second outer frame portion 682. The first opening 601 and the second opening 602 penetrate the first holder 61 in the first direction Z.

  On the surface of the other side Z2 in the first direction Z of the first holder 61, a convex portion 60a projecting to the other side Z2 in the first direction Z is formed at one diagonal position of the outer frame portion 68. In the diagonal position, a recess 60b that is recessed on one side Z1 in the first direction Z is formed. When the first holder 61 and the second holder 62 are assembled to form the holder 60, the convex portions 60a and the concave portions 60b facing the first direction Z are fitted together. Also, on the surface of the first holder 61 on one side Z1 in the first direction Z, convex portions 60a (not shown) are formed at both ends of the first outer frame portion 681, and concave portions are formed at both ends of the second outer frame portion 682. 60b (illustration omitted) is formed. The convex portion 60a and the concave portion 60b formed on the surface on the one side Z1 in the first direction Z are fitted with the concave portion 16a and the convex portion 16b of the first cover member 16 as described above.

  Further, the outer frame portion 68 of the first holder 61 is formed with through holes 60c at four diagonal positions on the outer peripheral side of the convex portion 60a and the concave portion 60b. The through hole 60 c is provided at a portion where the outer frame portion 68 of the first holder 61 and the outer frame portion 68 of the second holder 62 abut in the first direction Z. The positioning pins 69 are inserted through the four through holes 60c, respectively. One end of the positioning pin 69 is passed through the through hole 60 c of the first holder 61, and the other end is passed through the through hole 60 c of the second holder 62. The positioning pins 69 position the first holder 61 and the second holder 62 in a direction orthogonal to the first direction Z, and couple the first holder 61 and the second holder 62 together.

  The coil 7 is disposed in the coil holding hole 66 from the concave portion 64 side and is supported by the receiving portion 67. The first coils 71 and 72 are held in the coil holding hole 66 (first coil holding hole) of the first holder 61. The second coils 73 and 74 are held in the coil holding hole 66 (second coil holding hole) of the second holder 62. In the first outer frame portion 681 of the first holder 61 and the second holder 62, a terminal pin holding groove 685 is formed on the end surface on the side where the concave portion 64 opens. That is, in the first holder 61, the terminal pin holding groove 685 is formed on the end surface on the one side Z <b> 1 in the first direction Z of the first outer frame portion 681. Further, in the second holder 62, the end surface on the side where the recess 64 opens faces the other side Z <b> 2 in the first direction Z, so the terminal pin holding groove 685 is the end surface facing the other side Z <b> 2 in the first direction Z. Is formed. The terminal pin holding grooves 685 are formed at both ends of the first outer frame portion 681 in the third direction Y, and hold the terminal pins 10 one by one. The terminal pin 10 includes a first portion 10a disposed in the terminal pin holding groove 685 and extending linearly in the second direction X, and a second portion 10b connected to the first portion 10a at a substantially right angle (FIG. 4). reference). The second portion 10b is inserted into a mounting hole 686 (see FIG. 7) provided at the bottom of the terminal pin holding groove 685. The tip of the first portion 10a protrudes from the terminal pin holding groove 685 to one side X1 in the second direction X.

  FIG. 7 is a plan view of the actuator 1 with the cylindrical case 4 and the second cover member 17 removed, and is a plan view seen from the other side Z2 in the first direction Z, omitting the illustration of a third yoke 33 to be described later. It is. As shown in FIG. 7, in the second holder 62, the other side X <b> 2 of the terminal pin holding groove 685 in the second direction X is connected to the recess 64. A coil holding hole 66 is formed in the recess 64 to hold the coil 7. The conducting wire 75 drawn out from the coil 7 is drawn into the terminal pin holding groove 685 from the recess 64, and is connected to the first portion 10a of the terminal pin 10 by binding, soldering, or the like. The first holder 61 holds the first coils 71 and 72, and the two terminal pins 10 attached to the first holder 61 have the lead wires 75 on the winding start side of the first coils 71 and 72 and the end of winding. The side conductor 75 is connected. The two terminal pins 10 attached to the second holder 62 are connected to the winding start side conductor 75 and the winding end side conductor 75 of the second coils 73 and 74.

As shown in FIG. 3, two terminal pins 10 protrude from the first holder 61 and the second holder 62 in the recess 610 formed in the end portion 600 of the holder 60. These four terminal pins 10 are inserted into holes formed in the wiring board 15 and connected to a circuit pattern formed on the surface of the wiring board 15 (see FIG. 1).

(Movable body)
As shown in FIGS. 2 and 6, the movable body 3 includes a yoke 30 made of a magnetic plate, a weight 40 fixed to the yoke 30, and a magnet 8. The magnet 8 is fixed to the yoke 30 by adhesion or the like. The yoke 30 includes a first yoke 31 including a first plate portion 311, a second yoke 32 including a second plate portion 321 disposed on the other side Z <b> 2 of the first plate portion 311 in the first direction Z, and a second yoke 32. A third yoke 33 having a third plate portion 331 disposed on the other side Z2 of the plate portion 321 in the first direction Z. The first plate portion 311, the second plate portion 321, and the third plate portion. 331 extends parallel to the second direction X. The second plate portion 321 is disposed between the first coils 71 and 72 held by the first holder 61 and the second coils 73 and 74 held by the second holder 62. The magnet 8 includes first magnets 81 and 82 facing the first coils 71 and 72 in the first direction Z, and second magnets 83 and 84 facing the second coils 73 and 74 in the first direction Z. The first magnets 81 and 82 are fixed to the first plate portion 311, and the second magnets 83 and 84 are fixed to the third plate portion 331. The first magnets 81, 82 and the second magnets 83, 84 are each composed of two rectangular magnets facing the long side 701 of the coil 7 in the first direction Z.

(yoke)
As shown in FIGS. 2 and 6, the second yoke 32 has a flat plate shape. That is, the second yoke 32 is the second plate portion 321. The first yoke 31 extends from the first plate 311 toward the other side Z2 in the first direction Z to the position overlapping the second yoke 32 at the end on the one side X1 in the second direction X of the first plate 311. A first connecting plate portion 312 that is connected to the second yoke 32 and a second portion X2 from the first plate portion 311 toward the other side Z2 in the first direction Z at the end portion on the other side X2 in the second direction X. A second connecting plate portion 313 extending to a position overlapping the yoke 32 and connected to the second yoke 32 is provided. The first connecting plate portion 312 and the second connecting plate portion 313 are each bent toward the other side Z2 in the first direction Z from the end portion of the first plate portion 311 located on the opposite side in the second direction X. . For this reason, the first connecting plate portion 312 extends to the second yoke 32 through the one side X1 in the second direction X with respect to the first coil 71, and the second connecting plate portion 313 includes the first coil 72. On the other hand, it extends to the second yoke 32 through the other side Z2 in the second direction X. The first connecting plate portion 312 passes through the first opening 601 of the first holder 61 when passing the one side X <b> 1 in the second direction X with respect to the first coil 71. Further, the second connecting plate portion 313 passes through the second opening 602 of the first holder 61 when passing through the other side Z <b> 2 in the second direction X with respect to the first coil 72.

  As for the 1st connection board part 312 and the 2nd connection board part 313, the edge part of the other side Z2 of the 1st direction Z is connected with the edge part of the 2nd yoke 32 by welding. As shown in FIG. 4, concave portions 322 are formed at both end portions in the second direction X of the second yoke 32 (second plate portion 321) by cutting out corners at both ends in the third direction Y into rectangles. Has been. On the other hand, the first yoke 31 is formed with convex portions 314 that are fitted and welded to the concave portions 322 of the second yoke 32 at the end portions of the first connecting plate portion 312 and the second connecting plate portion 313. Has been.

The third yoke 33 and the first yoke 31 have the same shape and are arranged in the first direction Z in the opposite direction. The third yoke 33 extends from the third plate portion 331 toward the one side Z1 in the first direction Z to the position overlapping the second yoke 32 at the end portion on the one side X1 in the second direction X of the third plate portion 331. A third connecting plate portion 332 connected to the second yoke 32 and a second end from the third plate portion 331 toward the one side Z1 in the first direction Z at the end of the other side X2 in the second direction X. A fourth connecting plate portion 333 extending to a position overlapping the yoke 32 and connected to the second yoke 32 is provided. The third connecting plate portion 332 and the fourth connecting plate portion 333 are each bent toward the other side Z2 in the first direction Z from the end portions of the third plate portion 331 that are located on opposite sides of the second direction X. . For this reason, the third connecting plate portion 332 extends to the second yoke 32 through the one side X1 in the second direction X with respect to the second coil 73, and the fourth connecting plate portion 333 includes the second coil 74. On the other hand, it extends to the second yoke 32 through the other side Z2 in the second direction X. The third connecting plate portion 332 passes through the first opening 601 of the second holder 62 when passing through the one side X <b> 1 in the second direction X with respect to the second coil 73. The fourth connecting plate portion 333 passes through the second opening 602 of the second holder 62 when passing through the other side Z <b> 2 in the second direction X with respect to the second coil 74.

  As for the 3rd connection board part 332 and the 4th connection board part 333, the edge part of the one side Z1 of the 1st direction Z is connected with the edge part of the 2nd yoke 32 by welding. Convex portions 334 that fit into the concave portions 322 of the second yoke 32 and are welded are formed at the end portions of the third connecting plate portion 332 and the end portions of the fourth connecting plate portion 333. As for the 1st yoke 31 and the 3rd yoke 33, the center part of the 2nd direction X of the 1st board part 311 and the 3rd board part 331 is the widest of the 3rd direction Y, and the 1st opening part 601 and the 2nd opening part The portions (the first connecting plate portion 312, the second connecting plate portion 313, the third connecting plate portion 332, the fourth connecting plate portion 333) that are passed through the portion 602 are the first plate portion 311 and the third plate portion 331. The width in the third direction Y is narrower than the central portion in the second direction X.

(weight)
As shown in FIG. 2, the weight 40 includes a first weight 41 disposed between the first plate portion 311 and the second plate portion 321 of the yoke 30, and the second plate portion 321 and the third plate portion of the yoke 30. 331 includes a second weight 42 disposed between 331. In this embodiment, the first weight 41 and the second weight 42 have the same shape and are rectangular parallelepiped members made of a nonmagnetic metal such as tungsten or stainless steel. As shown in FIGS. 2 and 7, the first weight 41 is arranged in the weight arrangement hole 65 of the first holder 61, and the second weight 42 is arranged in the weight arrangement hole 65 of the second holder 62. Since the weight arrangement hole 65 is slightly larger than the first weight 41 and the second weight 42, when the movable body 3 vibrates in the second direction X, the first weight 41 and the second weight 42 are arranged in the weight arrangement hole 65. It moves in the second direction X inside.

  The first weight 41 and the second weight 42 are fixed to the yoke 30 by rivets 43. As shown in FIG. 6, the first weight 41 and the second weight 42 have a width in the third direction Y that is longer than the second direction X, and the rivets 43 are arranged at two locations separated in the third direction Y. Yes. The first weight 41 and the second weight 42, and the first plate portion 311, the second plate portion 321, and the third plate portion 331 of the yoke 30 have through holes for passing the rivets 43 in the first direction Z. It is formed at a position overlapping when viewed from above.

  As shown in FIG. 2, in this embodiment, the height of the gap in the first direction Z between the first plate portion 311 and the second plate portion 321 is equal to the thickness of the first weight 41 in the first direction Z. The height of the gap in the first direction Z between the second plate portion 321 and the third plate portion 331 is equal to the thickness of the second weight 42 in the first direction Z. Therefore, it is possible to attach the first weight 41 and the second weight 42 between the first plate portion 311 and the second plate portion 321 and between the second plate portion 321 and the third plate portion 331 without any gap. In addition, the thickness of the 1st weight 41 and the 2nd weight 42 can be made thin, and a spacer can also be attached to a clearance gap.

(Stopper mechanism)
As shown in FIGS. 2 and 7, the outer peripheral surfaces of the first weight 41 and the second weight 42 face the inner peripheral surface of the weight arrangement hole 65 in the second direction X. Accordingly, the first weight 41 and the second weight 42 are movable in the second direction X of the movable body 3 by colliding with the inner peripheral surface of the weight arrangement hole 65 when the movable body 3 is largely moved in the second direction X. A first stopper mechanism 38 for regulating the range is configured.

The third connecting plate portion 332 and the fourth connecting plate portion 333 of the third yoke 33 are opposed to the inner peripheral surfaces of the first opening 601 and the second opening 602 of the second holder 62 in the second direction X. . Therefore, the third connecting plate portion 332 and the fourth connecting plate portion 333 collide with the inner peripheral surfaces of the first opening portion 601 and the second opening portion 602 when the movable body 3 moves greatly in the second direction X. Thus, the second stopper mechanism 39 that restricts the movable range of the movable body 3 in the second direction X is configured. The second stopper mechanism 39 includes the first connecting plate portion 312 and the second connecting plate portion 313 of the first yoke 31, and the inner peripheral surfaces of the first opening 601 and the second opening 602 of the first holder 61. In the same way, the configuration is the same.

(basic action)
In the actuator 1 of this embodiment, when an alternating current is applied to the coil 7, the movable body 3 vibrates in the second direction X, so that the center of gravity of the actuator 1 varies in the second direction X. For this reason, the user can experience the vibration in the second direction X. At that time, the AC waveform applied to the coil 7 is adjusted to obtain an acceleration at which the movable body 3 moves to one side X1 in the second direction X and an acceleration at which the movable body 3 moves to the other side X2 in the second direction X. If different, the user can experience vibration having directionality in the second direction X.

(Main effects of this form)
As described above, in the actuator 1 of this embodiment, the movable body 3 includes the yoke 30 to which the magnet 8 is fixed and the weight 40 to be fixed to the yoke 30. The weight 40 is disposed in a space inside the yoke 30. Specifically, the first weight 41 is disposed between the first plate portion 311 and the second plate portion 321 of the yoke 30, and the second weight is disposed between the second plate portion 321 and the third plate portion 331 of the yoke 30. 42 is arranged. When the weight 40 is attached to the space inside the yoke 30 as described above, the weight 40 can be attached near the center of the movable body 3, so that the fluctuation of the center of gravity of the movable body 3 is small and the drive balance of the actuator 1 is reduced. There is little possibility of collapse. In addition, since the weight 40 does not affect the outer shape of the movable body 3, it is not necessary to secure an arrangement space for the weight 40 outside the movable body 3. Further, it is not necessary to change the design of the yoke 30. Therefore, the weight 40 having an appropriate weight can be easily attached.

  In this embodiment, since the yoke 30 has a three-stage structure, the first weight 41 and the second weight 42 can be attached in two stages. Therefore, the number of weights 40 can be increased, and it is easy to secure the weight of the movable body 3. A pair of the magnet 8 and the coil 7 is arranged in two stages, and a three-stage yoke 30 (a first plate part 311, a second plate part 321 and a third plate part 331) is provided so as to sandwich the pair. Therefore, magnetic efficiency can be improved, and driving force can be ensured even if the thickness of the magnet 8 is reduced.

  The weight 40 of this embodiment is fixed to the yoke 30 by rivets 43. That is, the first plate portion 311, the first weight 41, the second plate portion 321, the second weight 42, and the third plate portion 331 are stacked in this order, and the first weight 41 and the second weight are formed by the rivets 43 penetrating all of them. Two weights 42 are fixed to the yoke 30. Therefore, the weight 40 can be positioned and fixed by the rivet 43 at a time. Further, since the rivet 43 itself can be used as a weight, it is easy to secure the weight of the movable body 3.

  In this embodiment, one set of the coil 7 and the magnet 8 is arranged on both sides of the first weight 41 in the second direction X and on both sides of the second weight 42 in the second direction X. Therefore, since the weight 40 can be disposed at the center of the movable body 3, the center of gravity is less likely to fluctuate due to the addition of the weight 40. Therefore, there is little possibility that the drive balance of the actuator 1 is lost. Further, in the set of the coil 7 and the magnet 8 arranged in two stages in the first direction Z, the magnet 8 is fixed to the first plate portion 311 and the third plate portion 331, and the coil 7 is connected to the second plate portion 321. It is arranged at the opposite position. Therefore, since the magnet 8 and the coil 7 are symmetrically arranged in the first direction Z with the second plate portion 321 as the center, the balance is good.

  The support body 2 of this embodiment includes a first holder 61 and a second holder 62 that hold the coil 7, and the first holder 61 and the second holder 62 are assembled in a state in which they abut in the first direction Z. Yes. The second plate portion 321 is disposed in a gap formed by the concave portion 63 (first concave portion) on the first holder 61 side and the concave portion 63 (second concave portion) on the second holder 62 side facing each other. A weight arrangement hole 65 and a coil holding hole 66 are formed in 61 and the second holder 62, respectively. The first weight 41 and the second weight 42 are respectively a weight arrangement hole 65 (first weight arrangement hole) on the first holder 61 side and a weight arrangement hole 65 (second weight arrangement hole) on the second holder 62 side. The first stopper mechanism 38 that restricts the movable range of the movable body 3 in the second direction X is configured. Therefore, since the first stopper mechanism 38 can be provided using the weight 40, the impact resistance of the actuator 1 can be improved.

  In this embodiment, the first holder 61 and the second holder 62 include an outer frame portion 68 that abuts in the first direction Z, and the positioning pin 69 passes through the through hole 60c that penetrates the outer frame portion 68 in the first direction Z. Has been. Therefore, the first holder 61 and the second holder 62 can be positioned and coupled in the direction intersecting the first direction Z using the positioning pins 69. Moreover, since the 1st holder 61 and the 2nd holder 62 can be assembled without using an adhesive agent, an adhesion process can be decreased.

  The yoke 30 of this embodiment is bent from the first plate portion 311 toward the second plate portion 321, and is connected to the second plate portion 321. The first connection plate portion 312 and the second connection plate portion 313, and A third connecting plate portion 332 and a fourth connecting plate portion 333 are provided that are bent from the third plate portion 331 toward the second plate portion 321 and connected to the second plate portion 321. Therefore, the yoke 30 can protect the coil 7 and the magnet 8 by surrounding both sides in the second direction X. Further, the first connecting plate portion 312 and the second connecting plate portion 313 collide with the inner peripheral surfaces of the first opening portion 601 and the second opening portion 602 of the first holder 61 in the second direction X of the movable body 3. A second stopper mechanism 39 that restricts the movable range is configured. Similarly, the third connecting plate portion 332 and the fourth connecting plate portion 333 collide with the inner peripheral surfaces of the first opening portion 601 and the second opening portion 602 of the second holder 62 and the second direction X of the movable body 3. The 2nd stopper mechanism 39 which regulates the movable range of this is comprised. Therefore, the impact resistance of the actuator can be improved.

  The support body 2 of the present embodiment includes a first cover member 16, a first holder 61, a second holder 62, and a second cover member 17, and these members are stacked in the first direction Z and are mutually connected. It is in contact. The outer peripheral side of these members is surrounded by the cylindrical case 4 and is held by the cylindrical case 4. Thus, since it is not necessary to fix the 1st cover member 16, the 1st holder 61, the 2nd holder 62, and the 2nd cover member 17 using an adhesive agent by using cylindrical case 4, it is an adhesion process. Can be reduced. Moreover, since it is not necessary to fix using fixing members, such as a screw, a screw is unnecessary and a screw hole is formed in the 1st cover member 16, the 1st holder 61, the 2nd holder 62, and the 2nd cover member 17. There is no need to do. Therefore, a fixing member and a fixing hole are unnecessary, and the support body 2 can be reduced in size.

  In this embodiment, the viscoelastic member 9 is disposed at a portion where the support 2 and the movable body 3 face each other in the first direction Z. Specifically, the viscoelastic member 9 is disposed between the first cover member 16 and the first plate portion 311 and between the second cover member 17 and the third plate portion 331. Therefore, resonance when the movable body 3 is driven can be suppressed by the viscoelastic member 9.

Since the viscoelastic member 9 is deformed in the shear direction when the movable body 3 vibrates in the second direction X, the viscoelastic member 9 has a deformation characteristic in which a linear component is larger than a non-linear component. Therefore, in the viscoelastic member 9, the spring force according to the movement direction is constant. Therefore, since the spring element in the shear direction of the viscoelastic member 9 can be used when the movable body 3 vibrates in the second direction X, the reproducibility of the vibration acceleration with respect to the input signal can be improved, and the subtle Vibration can be realized with nuances. In addition, when the viscoelastic member 9 is pressed in the thickness direction (axial direction) between the movable body 3 and the support body 2 and compressively deformed, the non-linear component is larger than the linear component, and thus has a stretching property. The viscoelastic member can be prevented from being greatly deformed. Therefore, it can suppress that the gap of the movable body 3 and the support body 2 changes a lot.

  In this embodiment, since the support body 2 includes a plurality of members (first cover member 16, holder 60, and second cover member 17) laminated in the first direction Z, the support body 2 and the movable body 3 are provided. Although the distance between the opposing portions in the first direction Z is likely to vary, the support 2 is held so as not to be separated by the cylindrical case 4, so the viscoelastic member 9 is held in a compressed state in the first direction Z. can do. Therefore, the viscoelastic member 9 is always in contact with the support body 2 and the movable body 3. For this reason, the viscoelastic member 9 reliably follows the movement of the movable body 3. Moreover, since the part which the viscoelastic member 9 contacts in the 1st cover member 16 and the 2nd cover member 17 of the support body 2 is the recessed parts 165 and 175, the position of the viscoelastic member 9 is hard to shift | deviate. Further, since the surface of the viscoelastic member 9 that is in contact with the support 2 is bonded to the support 2 and the surface that is in contact with the movable body 3 is bonded to the movable body 3, the position of the viscoelastic member 9 is not easily displaced. Therefore, the viscoelastic member 9 reliably follows the movement of the movable body 3.

  In this embodiment, in the space where the viscoelastic member 9 is disposed, the first convex portion 167 protruding from the first cover member 16 toward the first plate portion 311 and the third cover portion 331 from the second cover member 17 are arranged. A second convex portion 177 that protrudes toward is formed. Therefore, the amount of crushing of the viscoelastic member 9 can be regulated by the first convex portion 167 contacting the first plate portion 311 and the second convex portion 177 contacting the third plate portion 331. Therefore, the durability of the viscoelastic member 9 can be increased.

(Other embodiments)
In the above embodiment, the present invention is applied to the actuator 1 including the three-stage yoke 30 including the first plate portion 311, the second plate portion 321, and the third plate portion 331. The present invention may be applied to an actuator having a yoke.

  In the above embodiment, weights are attached between the first plate portion 311 and the second plate portion 321 and between the second plate portion 321 and the third plate portion 331, but depending on the required weight, Only one of the weights may be attached. Alternatively, a metal weight may be attached to one place and a lightweight member such as resin may be attached to the other place.

  In the above embodiment, the weight 40 is fixed using the rivet 43. However, when the strength is not required, the weight 40 may be fixed using an adhesive.

  In the above embodiment, the weight 40 is disposed in the center of the movable body 3 in the second direction X, but weights may be attached to both ends of the movable body 3 in the second direction X.

  In the above embodiment, the present invention is applied to the actuator 1 that drives the movable body 3 only in the second direction X. However, the present invention is applied to the actuator 1 that drives the movable body 3 in the second direction X and the third direction Y. May be.

  In the above embodiment, the gel-like damper member is used as the viscoelastic member, but rubber or the like may be used as the viscoelastic member.

DESCRIPTION OF SYMBOLS 1 ... Actuator, 2 ... Support body, 2A ... Side surface, 3 ... Movable body, 4 ... Cylindrical case, 6 ... Magnetic drive circuit, 7 ... Coil, 8 ... Magnet, 9 ... Viscoelastic member, 10 ... Terminal pin, 10a ... 1st part, 10b ... 2nd part, 11 ... Cover, 15 ... Circuit board, 16 ... 1st cover member, 16a ... Recessed part, 16b ... Convex part, 17 ... 2nd cover member, 30 ... Yoke, 31 ... 1st 1 yoke 32 32 second yoke 33 third yoke 38 first stopper mechanism 39 second stopper mechanism 40 weight 41 first weight 42 second weight 43 rivet 50 ... 1st substrate support wall, 51 ... Positioning projection, 52 ... 1st substrate holding groove, 53 ... 2nd substrate support wall, 54 ... Positioning projection, 55 ... 2nd substrate holding groove, 56 ... Concave for substrate arrangement, 57 ... First inner surface (tapered surface), 58 ... second inner surface, 6 ... Holder, 60a ... Convex part, 60b ... Concave part, 60c ... Through hole, 61 ... First holder, 62 ... Second holder, 63 ... Concave part, 64 ... Concave part, 65 ... Weight placement hole, 66 ... Coil holding hole, 67 ... receiving part, 68 ... outer frame part, 69 ... positioning pin, 71, 72 ... first coil, 73, 74 ... second coil, 75 ... conducting wire, 81, 82 ... first magnet, 83, 84 ... second magnet , 160 ... end of the first cover member, 161 ... first wall part, 162 ... second wall part, 163 ... third wall part, 164 ... fourth wall part, 165 ... concave part, 166 ... rib, 167 ... first 1 convex part, 168 ... concave part, 170 ... end of second cover member, 171 ... first wall part, 172 ... second wall part, 173 ... third wall part, 174 ... fourth wall part, 175 ... concave part, 176 ... ribs, 177 ... second convex part, 178 ... concave part, 311 ... first plate part, 312 ... first series Plate part, 313 ... 2nd connection plate part, 314 ... convex part, 321 ... 2nd plate part, 322 ... recessed part, 331 ... 3rd plate part, 332 ... 3rd connection plate part, 333 ... 4th connection plate part, 334: convex portion, 410: first case, 411: first plate portion, 412: second plate portion, 413: third plate portion, 420: second case, 421: fourth plate portion, 422: fifth plate , 423 ... sixth plate part, 430 ... leaf spring part, 600 ... end part of holder, 601 ... first opening part, 602 ... second opening part, 610 ... concave part, 611 ... bottom face (substrate contact part), 681: First outer frame portion, 682: Second outer frame portion, 683 ... Third outer frame portion, 684 ... Fourth outer frame portion, 685 ... Terminal pin holding groove, 686 ... Mounting hole, 701 ... Long side of coil 702, short side of coil, X, second direction, Y, third direction, Z, first direction.

Claims (12)

A support;
A movable body supported movably on the support;
A magnetic drive circuit for moving the movable body relative to the support,
The magnetic drive circuit includes a first coil provided on the support and a first magnet provided on the movable body and facing the coil in a first direction, and the movable body is disposed in the first direction. Drive in the second direction intersecting with
The movable body includes a first plate portion disposed on one side in the first direction with respect to the first coil and the first magnet, and the first plate with respect to the first coil and the first magnet. A yoke provided with a second plate portion disposed on the other side of the direction, and a weight fixed to the yoke, wherein the weight is disposed between the first plate portion and the second portion. An actuator characterized by that. The yoke includes a third plate portion disposed on the other side in the first direction with respect to the second plate portion,
The magnetic drive circuit includes a second coil and a second magnet that face each other in the first direction, and the second coil and the second magnet are disposed between the second plate portion and the third plate portion. ,
The weight includes a first weight disposed between the first plate portion and the second portion, and a second weight disposed between the second plate portion and the third plate portion. The actuator according to claim 1.   The first weight and the second weight are fixed to the yoke by rivets penetrating the first plate portion, the first weight, the second plate portion, the second weight, and the third plate portion. The actuator according to claim 2. The first coil and the first magnet are arranged one by one on both sides of the first weight in the second direction,
4. The actuator according to claim 2, wherein one set of the second coil and the second magnet is disposed on each side of the second weight in the second direction. 5.   5. The actuator according to claim 2, wherein the first magnet is fixed to the first plate portion, and the second magnet is fixed to the third plate portion. 6. . The support includes a first holder and a second holder that comes into contact with the first holder from the other side in the first direction,
The first holder is formed with a first weight placement hole for placing the first weight, and a first coil holding hole for placing the first coil.
The second holder is formed with a second weight placement hole for placing the second weight, and a second coil holding hole for placing the second coil.
The first weight and the second weight collide with the inner peripheral surface of the first weight disposition hole and the inner peripheral surface of the second weight disposition hole, respectively, and thereby move the movable range of the movable body in the second direction. The actuator according to claim 5, wherein the actuator is regulated.   The first holder and the second holder include a through-hole penetrating in the first direction through a portion in contact with the first direction, and are coupled by a positioning pin that passes through the through-hole. The actuator according to claim 6. The yoke includes a first yoke having the first plate portion, a second yoke having the second plate portion, and a third yoke having the third plate portion,
The first yoke extends from the first plate portion toward the other side in the first direction to a position overlapping the second yoke and is connected to the second yoke; and Extending from the first plate portion to the other side in the first direction on the opposite side of the first magnet and the first coil from the first connecting plate portion to a position overlapping the second yoke. A second connecting plate portion connected to the second yoke,
The third yoke extends from the third plate portion toward one side in the first direction to a position overlapping with the second yoke, and is connected to the second yoke; and The second magnet and the second coil extend from the third plate portion to the one side in the first direction on the opposite side of the first coupling plate portion to a position overlapping the second yoke. A fourth connecting plate portion connected to the second yoke,
The first connecting plate portion and the second connecting plate portion each collide with an inner peripheral surface of an opening formed in the first holder to regulate a movable range in the second direction of the movable body,
The third connecting plate portion and the fourth connecting plate portion collide with the inner peripheral surface of the opening formed in the second holder, respectively, and restrict the movable range of the movable body in the second direction. The actuator according to claim 7. The support is
A first cover member in contact with the first holder from one side in the first direction;
A second cover member in contact with the second holder from the other side in the first direction;
The actuator according to any one of claims 6 to 8, further comprising a cylindrical case surrounding an outer peripheral side of the first cover member, the first holder, the second holder, and the second cover member. . The first plate portion is disposed between the first cover member and the first holder, and the third plate portion is disposed between the second cover member and the second holder,
The viscoelastic member is disposed between the first cover member and the first plate portion and between the second cover member and the third plate portion. Actuator. The first cover member includes a first convex portion that protrudes from the surface to which the viscoelastic member is connected toward the first plate portion,
11. The actuator according to claim 10, wherein the second cover member includes a second convex portion that projects toward the third plate portion from a surface to which the viscoelastic member is connected.   The actuator according to claim 10 or 11, wherein the viscoelastic member is a gel-like damper member.

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