JP2019034252A - Actuator - Google Patents

Abstract

To provide an actuator which enables a viscoelastic member provided between a movable body and a support body to stably achieve a function.SOLUTION: In an actuator 1, a viscoelastic member (a first viscoelastic member 910 and a second viscoelastic member 920) is disposed between a movable body 3 and a support medium 2. The first viscoelastic member 910 is disposed in a portion where the movable body 3 faces the support medium 2 at one side X1 in a first direction X. The second viscoelastic member 920 is disposed in a portion where the movable body 3 faces the support medium 2 at the other side X2 in the first direction X. The first viscoelastic member 910 and the second viscoelastic member 920 contact with the support medium 2 and the movable body 3 when the movable body 3 vibrates in the first direction X. Further, in a time period that a driving mechanism 5 is stopped, the first viscoelastic member 910 and the second viscoelastic member 920 are compressed in the first direction X.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an actuator that generates vibration.

  As an apparatus for generating vibration, an actuator has been proposed that causes a movable body to vibrate in a direction crossing the opposing direction of the coil and the magnet with respect to the support by a driving mechanism including opposing coils and magnets ( Patent Document 1). In the actuator described in Patent Document 1, a viscoelastic member made of a gel-like member is disposed between the movable body and the support, and the movable body is supported by the support via the viscoelastic member. In addition, resonance when the movable body is driven is suppressed.

JP 2006-127789 A

  However, in the actuator described in Patent Document 1, each of the movable body and the support body has a structure in which a plurality of members are overlapped, and the movable body and the support body intersect the vibration direction of the movable body. A viscoelastic member is disposed in a portion facing in the direction. For this reason, if the opposing distance between the movable body and the support in the portion where the viscoelastic member is arranged varies, there is a problem that the thickness of the viscoelastic member varies and the characteristics of the actuator vary.

  In view of the above problems, an object of the present invention is to provide an actuator in which a viscoelastic member provided between a movable body and a support exhibits a stable function.

  In order to solve the above problems, an actuator to which the present invention is applied includes a support, a movable body, a drive mechanism that vibrates the movable body in a first direction with respect to the support, and the movable body supports the support. A first viscoelastic member provided at a part facing the body on one side in the first direction, and a movable body provided at a part facing the support on the other side in the first direction. And a second viscoelastic member.

  In the present invention, since the viscoelastic members (the first viscoelastic member and the second viscoelastic member) are arranged between the movable body and the support body, when the movable body is vibrated, the first viscoelastic member and Since the second viscoelastic member exhibits a damper function, the movable body is unlikely to resonate. The first viscoelastic member is disposed in a portion where the movable body is opposed to the support on one side in the first direction, and the second viscoelastic member is disposed in the first direction with respect to the support. It arrange | positions in the part which opposes on the other side. For this reason, the relative position of the movable body and the support body varies in the first direction, the distance between the movable body and the support body at the portion where the first viscoelastic member is disposed, and the second viscoelasticity. When the distance between one of the distances between the movable body and the support at the portion where the member is arranged becomes wider, the distance between the other becomes narrower. Therefore, the characteristics obtained by synthesizing the characteristics of the first viscoelastic member and the characteristics of the second viscoelastic member are not easily affected by the variation in the distance, and the first viscoelastic member and the second viscoelastic member are stable. Demonstrate the function.

In this invention, the said 1st viscoelastic member is provided in the part which the edge parts of the one side of the said 1st direction of the said movable body and the said support body oppose in the said 1st direction, The said 2nd viscoelastic member Is
It is possible to adopt a mode in which the end portions on the other side in the first direction of the movable body and the support body are provided in portions facing each other in the first direction.

  In the present invention, the first viscoelastic member and the second viscoelastic member may each adopt a mode in which the movable body is in contact with the support and the movable body when the movable body vibrates in the first direction. it can. According to this aspect, the viscoelastic members (the first viscoelastic member and the second viscoelastic member) reliably follow the movement of the movable body. Therefore, the resonance of the movable body can be effectively prevented.

  A mode in which the first viscoelastic member and the second viscoelastic member are compressed in the first direction while the drive mechanism is stopped may be employed. According to this aspect, the viscoelastic members (the first viscoelastic member and the second viscoelastic member) reliably follow the movement of the movable body. Therefore, the resonance of the movable body can be effectively prevented. In addition, when the movable body vibrates, the first viscoelastic member and the second viscoelastic member always exert a force to expand within a predetermined stroke, so that the first viscoelastic member and the second viscoelastic member Demonstrate stable damper function.

  In the present invention, the drive mechanism is disposed in a portion where the movable body and the support body face each other in a second direction intersecting the first direction, and the support body includes a base member, the base member, and the base member. A holder portion that protrudes to one side of a first direction and a third direction that intersects the second direction and holds a support-side component for constituting the drive mechanism; and the holder portion in the first direction A first protrusion protruding from the base member to one side in the third direction on one side, and protruding from the base member to one side in the third direction on the other side of the first direction with respect to the holder portion The movable body has a first wall portion facing the holder portion on one side in the second direction and a holder wall facing the holder portion on the other side in the second direction. On one side of the first direction to the second wall and the first convex And a fourth wall portion facing the second convex portion on the other side in the first direction so as to overlap a surface of the first wall portion facing the holder portion. A part of the movable body side component for configuring the drive mechanism is disposed, and another part of the movable body side component is disposed so as to overlap a surface of the second wall facing the holder part, The first viscoelastic member is disposed between the first convex portion and the third wall portion, and the second viscoelastic member is disposed between the second convex portion and the fourth wall portion. The aspect which is can be employ | adopted.

  In the present invention, the movable body is connected to at least one of the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion so that the driving mechanism is A mode having an output member covering from one side in the third direction can be adopted. According to this aspect, the vibration of the movable body can be output via the output member, so that the user who touched the output member can feel a strong vibration.

  In the present invention, one end of the first wall in the first direction, one end of the first wall in the first direction, one of the second wall in the first direction. A mode in which a guide mechanism for guiding the movable body in the first direction is provided at each of a total of four positions, that is, an end portion on the side and an end portion on the other side in the first direction of the second wall portion. Can be adopted.

  In the present invention, it is possible to adopt a mode in which the guide mechanism includes rolling balls supported from both sides in the second direction by the movable body and the support body at each of the four locations. According to this aspect, even when the movable body is supported by the support body via the rolling ball, the movable body vibrates smoothly in the first direction.

In the present invention, since the viscoelastic members (the first viscoelastic member and the second viscoelastic member) are arranged between the movable body and the support body, when the movable body is vibrated, the movable body has a damper function. Because it exerts, the movable body is difficult to resonate. The first viscoelastic member is disposed between the movable body and the support on one side in the first direction with respect to the movable body, and the second viscoelastic member is disposed on the other side in the first direction with respect to the movable body. On the side, it is arranged between the movable body and the support. For this reason, the distance between the movable body and the support body on one side in the first direction with respect to the movable body and the distance between the movable body and the support body on the other side in the first direction with respect to the movable body vary. However, when one of the gaps is wide, the other gap is narrowed. Therefore, the characteristic obtained by combining the characteristic of the first viscoelastic member and the characteristic of the second viscoelastic member is affected by the fluctuation of the gap. It is difficult, and the first viscoelastic member and the second viscoelastic member exhibit stable functions.

It is a perspective view of an actuator concerning an embodiment of the present invention. It is XZ sectional drawing of the actuator shown in FIG. It is YZ sectional drawing when the actuator shown in FIG. 1 is cut | disconnected in the position which passes a drive mechanism. It is YZ sectional drawing when the actuator shown in FIG. 1 is cut | disconnected in the position which passes a guide mechanism. It is a perspective view of the state which removed the output member of the movable body from the actuator shown in FIG. It is the disassembled perspective view which isolate | separated the support body and the movable body in the actuator shown in FIG. It is a disassembled perspective view of the state which removed the cover from the support body shown in FIG. It is a disassembled perspective view of the state which removed the support body side component for comprising a drive mechanism from the support body shown in FIG. It is a disassembled perspective view of the state which removed the movable body side component for comprising a drive mechanism from the movable body shown in FIG. It is a perspective view of the drive mechanism shown in FIG. It is a top view of the drive mechanism shown in FIG.

  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 X, a second direction Y, and a third direction Z, respectively. The first direction X, the second direction Y, and the third direction Z are directions orthogonal to each other.

  Moreover, X1 is attached to one side of the first direction X, X2 is attached to the other side of the first direction X, Y1 is attached to one side of the second direction Y, and Y2 is attached to the other side of the second direction Y. And Z1 is attached to one side of the third direction Z, and Z2 is attached to the other side of the third 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 an XZ sectional view of the actuator 1 shown in FIG. FIG. 3 is a YZ sectional view when the actuator 1 shown in FIG. 1 is cut at a position passing through the drive mechanism 5. FIG. 4 is a YZ cross-sectional view of the actuator 1 shown in FIG. 1 cut at a position passing through the guide mechanism 8.

As shown in FIG. 1, the actuator 1 of the present embodiment has a rectangular parallelepiped shape as a whole in which the dimension in the first direction X is larger than the dimension in the second direction Y and the dimension in the third direction Z. In addition, as will be described below with reference to FIGS. 2, 3, 4, and the like, the actuator 1 includes a support body 2 coupled to the apparatus main body, and a movable body 3 movably supported by the support body 2. And a drive mechanism 5 that vibrates the movable body 3 in the first direction X with respect to the support body 2. The actuator 1 also includes a guide mechanism 8 that guides the movable body 3 in the first direction X, and elastic members (the first elastic member 91 and the second elastic member 92) connected to the support body 2 and the movable body 3. Have. Therefore, the movable body 3 is supported by the support body 2 via the guide mechanism 8 and the elastic members (the first elastic member 91 and the second elastic member 92), and vibrates in the first direction X in this state.

(Configuration of the support 2)
FIG. 5 is a perspective view showing a state where the output member 38 of the movable body 3 is removed from the actuator 1 shown in FIG. FIG. 6 is an exploded perspective view in which the support 2 and the movable body 3 are separated from each other in the actuator 1 shown in FIG. FIG. 7 is an exploded perspective view of the support 2 shown in FIG. 6 with the cover 25 removed. FIG. 8 is an exploded perspective view of the support 2 shown in FIG. 6 with the support-side component 5b for configuring the drive mechanism 5 removed.

  As shown in FIGS. 2 to 8, the support 2 includes a plate-like base member 21, a holder portion 22 that protrudes from the base member 21 to one side Z <b> 1 in the third direction Z, and the holder portion 22. The first convex portion 23 projecting from the base member 21 to the one side Z1 in the third direction Z on the one side X1 in the first direction X, and the first convex portion 23 from the base member 21 on the other side X2 in the first direction X with respect to the holder portion 22. It has the 2nd convex part 24 which protruded to the one side Z1 of the three directions Z. The base member 21 is a connection part to the apparatus main body. The holder part 22, the first convex part 23, and the second convex part 24 are each fixed to the base member 21 from the other side Z2 in the third direction Z by screws 219 (see FIG. 2 and the like).

  The holder part 22 is a part that holds the support-side component 5 b for constituting the drive mechanism 5. The holder portion 22 is disposed along the first direction X on the other side Y2 of the second direction Y and the columnar portions 221, 222, and 223 disposed along the first direction X on one side Y1 in the second direction Y. Columnar portions 224, 225, and 226. The columnar portions 221, 222, and 223 have root portions connected by a connecting portion 227 that extends in the first direction X, and the columnar portions 224, 225, and 226 have root portions that are connected by a connecting portion 228 that extends in the first direction X. Are connected.

  A cover 25 is provided at one end Z1 of the columnar portions 221 to 226 in the third direction Z, one end Z1 of the first protrusion 23, and one end Z1 of the second protrusion 24. It is fixed by screws 259. The cover 25 includes a flat plate portion 250 that covers the holder portion 22, a first side plate portion 251 that is bent from an end portion on one side X1 in the first direction X of the flat plate portion 250 to the other side Z2 in the third direction Z, and a flat plate portion. And a second side plate portion 252 bent from the end portion of the other side X2 of the first direction X of 250 to the other side Z2 of the third direction Z. The first side plate portion 251 overlaps the first convex portion 23 from one side X1 in the first direction X, and the second side plate portion 252 overlaps the second convex portion 24 from the other side X2 in the first direction X. The flat plate portion 250 is formed with holes 250b and 250c into which the rectangular opening portion 250a, the positioning convex portion 239 of the first convex portion 23, and the positioning convex portion 249 of the second convex portion 24 are fitted.

(Configuration of movable body 3)
FIG. 9 is an exploded perspective view of the movable body 3 shown in FIG. 6 with the movable body side component 5a for configuring the drive mechanism 5 removed. As shown in FIGS. 2 to 6 and FIG. 9, the movable body 3 includes a first wall portion 31 facing the holder portion 22 on one side Y1 in the second direction Y, and a holder portion 22 in the second direction Y. The second wall portion 32 facing the other side Y2, the third wall portion 33 facing the first convex portion 23 on the one side X1 in the first direction X, and the other side of the second convex portion 24 in the first direction X. And a fourth wall 34 facing each other at X2. The first wall portion 31, the second wall portion 32, the third wall portion 33, and the fourth wall portion 34 are made of different members, and are connected by screws 391 to form a rectangular frame 30.

The movable body 3 includes an output member 38 that is connected to any one of the first wall portion 31, the second wall portion 32, the third wall portion 33, and the fourth wall portion 34 and covers the drive mechanism 5. In this embodiment, the output member 38 has a quadrangular plate shape, and is connected to an end portion on one side Z1 in the third direction Z of the first wall portion 31 and the second wall portion 32 by a screw 392. The output member 38 is connected to only one of the first wall portion 31 and the second wall portion 32, or the first wall portion 31, the second wall portion 32, the third wall portion 33, and the fourth wall. The aspect connected with at least 1 of the part 34 may be sufficient. In the output member 38, cylindrical cylindrical portions 386, 387, 388, and 389 protrude toward the one side Z1 in the third direction Z. The cylindrical portions 386, 387, 388, and 389 Used when fixing.

  In the 1st wall part 31 and the 2nd wall part 32, the inner surface 310,320 side facing the holder part 22 is a part which arrange | positions the movable body side component 5a mentioned later, and the 1st wall part 31 and the 2nd The end portion on the other side Z2 in the third direction Z of the wall portion 32 constitutes bottom plate portions 315 and 325 that support the movable body side component 5a. Therefore, the 1st wall part 31 and the 2nd wall part 32 are comprised with the nonmagnetic material so that it may not exert a magnetic influence on the movable body side component 5a. In this embodiment, the first wall portion 31, the second wall portion 32, the third wall portion 33, the fourth wall portion 34, and the output member 38 are all made of a nonmagnetic material.

  In the bottom plate portions 315 and 325, shaft portions 316, 317, 326, and 327 projecting to one side Z <b> 1 in the third direction Z are formed on both end sides in the first direction X, respectively. The shaft portions 316, 317, 326, and 327 are configured such that end portions on one side Z 1 in the third direction Z are fitted in the holes 381, 382, 383, and 384 of the output member 38. Further, on the bottom surfaces of the first wall portion 31 and the second wall portion 32, shaft portions 318 and 328 protrude from the center portion in the first direction X to the other side Z <b> 2 in the third direction Z. The shaft portions 318 and 328 abut against the base member 21 when the movable body 3 is displaced to the other side Z1 in the third direction Z, and define a movable range of the movable body 3 toward the other side Z1 in the third direction Z. doing.

(Configuration of guide mechanism 8)
The drive mechanism 5 shown in FIGS. 2, 5, 6 and the like drives the movable body 3 to the one side X1 and the other side X2 in the first direction X with respect to the support body 2 to move the movable body 3 in the first direction X. Vibrate with. Therefore, in the actuator 1, as shown in FIGS. 4 and 6, a guide mechanism 8 that guides the movable body 3 in the first direction X is provided at a position where the movable body 3 and the support body 2 face each other in the second direction Y. Is provided.

  In configuring the guide mechanism 8, in this embodiment, the guide unit 80 having the same configuration is separated in the first direction X on the one side Y <b> 1 in the second direction Y of the movable body 3 and the second of the movable body 3. It is provided at a total of four locations, two locations spaced apart in the first direction X on the other side Y2 of the direction Y. More specifically, the guide mechanism 8 (guide unit 80) includes the end of the first wall portion 31 of the movable body 3 on one side X1 in the first direction X and the other end of the first wall portion 31 in the first direction X. It is provided at a total of four locations: an end portion on the side X2, an end portion on one side X1 in the first direction X of the second wall portion 32, and an end portion on the other side X2 in the first direction X of the second wall portion 32. Yes.

  Here, the guide mechanism 8 (guide unit 80) includes a rolling ball 83 supported by the movable body 3 and the support body 2 from both sides in the second direction Y at each of the four positions. More specifically, the guide mechanism 8 includes two first rails 81 extending in the first direction X in parallel in the third direction Z on the support body 2 side, and the third direction Z on the movable body 3 side. The two second rails 82 extending in parallel in the first direction X, and the rolling balls supported from both sides in the second direction Y by the two first rails 81 and the two second rails 82 83.

The two first rails 81 are formed on the side surface of the first convex portion 23 on the one side Y1 in the second direction Y and the side surface of the first convex portion 23 on the other side Y2 in the second direction Y. The recessed portion 232 formed, the recessed portion 241 formed on the side surface on one side Y1 in the second direction Y of the second protruding portion 24, and the recessed portion formed on the side surface on the other side Y2 in the second direction Y in the second protruding portion 24. Both ends are fixed at 232. Reinforcing convex portions 231 a, 232 a, 241 a, and 242 a that support the two first rails 81 from the side opposite to the rolling ball 83 are formed in the concave portions 231, 232, 241, and 242.

  The two second rails 82 are a recess 311 formed on the inner surface of the end portion on one side X1 of the first wall portion 31 in the first direction X, and the other side X2 of the first wall portion 31 in the first direction X. The concave portion 312 formed on the inner surface of the end portion, the concave portion 321 formed on the inner surface of the end portion on one side X1 in the first direction X of the second wall portion 32, and the other in the first direction X of the second wall portion 32 Both ends are fixed by each of the recesses 322 formed on the inner surface of the end portion of the side X2. Reinforcing convex portions 311 a, 312 a, 321 a, and 322 a that support the two second rails 82 from the side opposite to the rolling ball 83 are formed in the concave portions 311, 312, 321, and 322.

(Configuration of viscoelastic member)
As shown in FIGS. 2 and 6, in the actuator 1, a first elastic member 91 is provided in a portion where the movable body 3 faces the support body 2 on one side X <b> 1 in the first direction X, and the first elastic member A second elastic member 92 is provided at a portion where the movable body 3 is opposed to the support body 2 on the other side X2 in the first direction X at a position spaced apart from 91 in the first direction X.

  In the present embodiment, the first elastic member 91 is provided at a portion where the end portions on one side X1 in the first direction X of the movable body 3 and the support body 2 face each other in the first direction X. The second elastic member 92 is provided at a portion where the end portions on the other side X2 in the first direction X of the movable body 3 and the support body 2 face each other in the first direction X. More specifically, the first elastic member 91 includes a third wall 33 that is an end portion on one side X1 of the movable body 3 in the first direction X, and a first side X1 of the support body 2 in the first direction X. It is provided between the first convex part 23 which is an end part. The second elastic member 92 is a fourth wall portion 34 that is an end portion on the other side X2 of the movable body 3 in the first direction X, and a second portion that is an end portion on the other side X2 of the support body 2 in the first direction X. It is provided between the convex portions 24.

  In this embodiment, since the first side plate portion 251 of the cover 25 overlaps with the one side X1 of the first convex portion 23 in the first direction X, the first elastic member 91 includes the first side plate portion 251 and the third side plate 251. It is provided between the wall 33. In addition, since the second side plate portion 252 of the cover 25 overlaps the other side X2 of the second convex portion 24 in the first direction X, the second elastic member 92 includes the second side plate portion 252 and the fourth wall portion. 34.

  The first elastic member 91 and the second elastic member 92 are each composed of a spring, a viscoelastic member, or the like. In this embodiment, the first elastic member 91 is a first viscoelastic member 910 such as a gel-like member or rubber. The second elastic member 92 is a second viscoelastic member 920 such as a gel-like member or rubber. Viscoelasticity is a property that combines both viscosity and elasticity, and is a property that is prominently seen in polymer materials such as gel-like members, plastics, and rubbers. Therefore, various gel-like members can be used as the first viscoelastic member 910 and the second viscoelastic member 920. Further, as the first viscoelastic member 910 and the second viscoelastic member 920, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber), chloroprene rubber, acrylonitrile / butadiene rubber, etc.), non-diene Various rubber materials such as butyl rubber (for example, butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluorine rubber, etc.), thermoplastic elastomers, and modified materials thereof may be used.

In this embodiment, gel-like members are used as the first viscoelastic member 910 and the second viscoelastic member 920. More specifically, the first viscoelastic member 910 and the second viscoelastic member 920 are silicone gels 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 has linear or non-linear stretch characteristics depending on the stretch direction. For example, when the viscoelastic member is pressed in the thickness direction and compressively deformed, the viscoelastic member 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, it has an expansion / contraction characteristic in which a linear component (spring coefficient) is larger than a non-linear component (spring coefficient).

  Here, the first viscoelastic member 910 and the second viscoelastic member 920 are respectively fixed to the movable body 3 and the support body 2 by a method such as adhesion. For this reason, the first viscoelastic member 910 and the second viscoelastic member 920 are in contact with the support body 2 and the movable body 3 when the movable body 3 vibrates in the first direction X, respectively. Further, the first viscoelastic member 910 and the second viscoelastic member 920 are compressed in the first direction X during a period when the drive mechanism 5 is stopped (a period when vibration of the movable body 3 is stopped). The first viscoelastic member 910 and the second viscoelastic member 920 are each compressed in the first direction X within a predetermined stroke of the movable body 3.

(Configuration of drive mechanism 5)
FIG. 10 is a perspective view of the drive mechanism 5 shown in FIG. FIG. 11 is a plan view of the drive mechanism 5 shown in FIG. As shown in FIGS. 10 and 11, the drive mechanism 5 includes a first protrusion protruding from one side Y1 in the second direction Y toward the other side Y2 on one side member of the support 2 and the movable body 3. The first magnetic core 51 is provided with a plurality of poles 511 along the first direction X, and the second magnetic core 52 is opposed to the first magnetic core 51 on the other side Y2 in the second direction Y. In the second magnetic core 52, a plurality of second salient poles 521 projecting from the other side Y2 in the second direction Y toward the one side Y1 are provided along the first direction X. Here, the second salient pole 521 has an opposite phase to the first salient pole 511. That is, in the first magnetic core 51, the concave portions 512 are formed between the first salient poles 511, and the convex portions formed by the second salient poles 521 in the second magnetic core 52 are between the first salient poles 511. It faces the formed recess 512 in the second direction Y. Further, in the second magnetic core 52, a concave portion 522 is formed between the second salient poles 521, and the convex portion formed by the first salient pole 511 in the first magnetic core 51 is between the second salient poles 521. It faces the formed recess 522 in the second direction Y.

  The drive mechanism 5 includes an armature 54 provided between the first magnetic core 51 and the second magnetic core 52 on the other member of the support 2 and the movable body 3. The armature 54 includes a permanent magnet 56 magnetized in the first direction X, a first armature core 57 that overlaps the permanent magnet 56 from one side X1 in the first direction X, and a permanent magnet 56 in the first direction X. A second armature core 58 overlapping from the other side X2 and a drive coil 59 wound so as to pass through the outer surface side of the first armature core 57 and the outer surface side of the second armature core 58 are provided. In this embodiment, the drive coil 59 is wound around an insulating bobbin 55, and the first armature core 57 and the second armature core 58 are arranged in the second direction Y inside the body portion of the bobbin 55. It consists of core members 57a and 58a inserted from one side Y1, and core members 57b and 58b inserted from the other side Y2 in the second direction Y.

  In the armature 54, a plurality of armature units 540 including a permanent magnet 56, a first armature core 57, a second armature core 58, and a drive coil 59 are arranged along the first direction X. In this embodiment, in the armature 54, two armature units 540 are arranged along the first direction X.

In this embodiment, the one side member is the movable body 3, and the other side member is the support body 2. Therefore, the first magnetic core 51 and the second magnetic core 52 are provided on the movable body 3 as the movable body-side component 5 a for configuring the drive mechanism 5. More specifically, the first magnetic core 51 and the second magnetic core 52 overlap the inner surfaces 310 and 320 of the first wall portion 31 and the second wall portion 32 of the movable body 3 as the movable body-side component 5a. Arranged and fixed. Here, in the first magnetic core 51 and the second magnetic core 52, holes 516, 517, 526, and 527 are formed at two positions spaced apart in the first direction X, and the first magnetic core 51 and the second magnetic core 52 are formed. When fixing the core 52 to the first wall portion 31 and the second wall portion 32, the first wall portion 31 and the second wall portion are inserted into the holes 516, 517, 526 and 527 of the first magnetic core 51 and the second magnetic core 52. 32 shaft portions 316, 317, 326, 327 are fitted and positioned.

  Further, the armature 54 (armature unit 540) is provided in the holder portion 22 of the movable body 3 as a support side component 5b for constituting the drive mechanism 5. More specifically, one armature unit 540 is arranged between the columnar portions 221 and 224 provided in the holder portion 22 and the columnar portions 222 and 225, and the columnar portions 222 and 225 provided in the holder portion 22 and the columnar shapes are arranged. One armature unit 540 is arranged between the parts 223 and 226. Here, engagement concave portions 571 and 581 that engage with the columnar portions 221 to 226 are formed on the surfaces (outer surfaces) opposite to the permanent magnets 56 of the first armature core 57 and the second armature core 58. ing. Accordingly, the first armature core 57 and the second armature core 58 are fixed to the support 2 in a state where the first armature core 57 and the second armature core 58 are positioned in the first direction X and the second direction Y with respect to the holder portion 22. The end of one side Z1 in the third direction Z of the child unit 540) is located inside the opening 250a of the cover 25.

  In this state, the first salient pole 511 and the second salient pole 521 of the first magnetic core 51 and the second magnetic core 52 are the second armature core 57 and the second armature core 58 of the armature 54, respectively. It faces the end surface in the direction Y in the second direction Y with a gap. In this way, when the drive mechanism 5 is configured, the drive mechanism 5 is configured in a space surrounded by four places where the guide mechanism 8 (guide unit 80) is disposed when viewed from the third direction Z. . In this embodiment, the entire support 2 is made of a nonmagnetic material.

(basic action)
In the actuator 1 of this embodiment, when an alternating current is applied to the drive coil 59, the drive mechanism 5 linearly drives the movable body 3 to the one side X1 and the other side X2 in the first direction X, like a linear motor. Therefore, since the movable body 3 vibrates in the first direction X, the center of gravity of the actuator 1 vibrates in the first direction X. For this reason, the user who touched the actuator 1 can experience the vibration in the first direction X. At that time, the AC waveform applied to the drive coil 59 is adjusted, and the acceleration at which the movable body 3 moves to one side X1 in the first direction X and the acceleration at which the movable body 3 moves to the other side X2 in the first direction X. , The user can experience vibration having directionality in the first direction X.

  In this embodiment, since the output member 38 is exposed, if the user touches the output member 38, the vibration of the movable body 3 can be directly experienced.

(Main effects of this form)
As described above, in the actuator 1 of the present embodiment, the drive mechanism 5 uses the change in magnetic flux density in which the magnetic flux generated from the armature 54 passes through the first magnetic core 51 and the second magnetic core 52 to generate thrust. In other words, since the drive mechanism 5 operates in the same manner as a linear motor, a large thrust can be generated in the movable body 3. Therefore, the user can feel a strong vibration.

  The first magnetic core 51 and the second magnetic core 52 are provided on the movable body 3, and the armature 54 is provided on the support body 2. For this reason, unlike the case where the movable coil 3 is provided with the drive coil 59, power supply to the drive coil 59 is easy.

  The movable body 3 has an output member 38 that covers the drive mechanism 5 from one side Z1 in the third direction Z, and the output member 38 is exposed. Therefore, since the vibration of the movable body 3 can be output via the output member 38, the user who touched the output member 38 can feel a strong vibration.

  In the guide mechanism 8, the rolling ball 83 is supported by the two first rails 81 on the support body 2 side and the two second rails 82 on the movable body 3 side. For this reason, the movable body 3 vibrates smoothly in the first direction X while being guided by the guide mechanism 8. Here, the rolling ball 83 is supported from both sides in the second direction Y by the two first rails 81 on the support body 2 side and the two second rails 82 on the movable body 3 side. For this reason, even if an external force is applied to the movable body 3, the displacement of the movable body 3 in the second direction Y and the third direction Z is suppressed by the guide mechanism 8. Therefore, the movable body 3 can be appropriately vibrated in the first direction X even when an external force is applied to the movable body 3.

  Since the two first rails 81 and the two second rails 82 each have a convex curved surface for supporting the rolling ball 83, the rolling ball 823 support 2 side (first rail 81) And the contact area between the rolling ball 83 and the movable body 3 (second rail 82) is small. Therefore, since the sliding resistance when the movable body 3 vibrates in the first direction X is small, the movable body 3 can be smoothly vibrated in the first direction X. Further, since the first rail 81 and the second rail 82 are each in the shape of a round bar, the first rail 81 and the second rail 82 each have a high strength.

  The guide mechanism 8 (guide unit 80) has two locations that are separated in the first direction X on one side Y1 in the second direction Y of the movable body 3 and the first direction on the other side Y2 in the second direction Y of the movable body 3. It is provided in a total of four places, two places separated by X. Therefore, the movable body 3 can be properly guided in a stable posture.

  Further, since the viscoelastic members (the first viscoelastic member 910 and the second viscoelastic member 920) are arranged between the movable body 3 and the support body 2, when the movable body 3 is vibrated, the first viscoelastic member is disposed. The elastic member 910 and the second viscoelastic member 920 exhibit a damper function. Therefore, the movable body 3 is unlikely to resonate. The first viscoelastic member 910 is disposed at a portion where the movable body 3 is opposed to the support body 2 on the one side X1 in the first direction X, and the second viscoelastic member 920 is the movable body 3 is the support body. 2 on the other side X2 in the first direction X. For this reason, the relative position between the movable body 3 and the support body 2 varies in the first direction X, and the distance between the movable body 3 and the support body 2 at the portion where the first viscoelastic member 910 is disposed. When the distance between one of the distances between the movable body 3 and the support 2 at the portion where the second viscoelastic member 920 is disposed becomes larger, the other distance becomes smaller. Therefore, the characteristic obtained by synthesizing the characteristic of the first viscoelastic member 910 and the characteristic of the second viscoelastic member 920 is not easily affected by the variation in the interval. Therefore, the first viscoelastic member 910 and the second viscoelastic member 920 exhibit stable functions.

  The first viscoelastic member 910 and the second viscoelastic member 920 are in contact with the support body 2 and the movable body 3 when the movable body 3 vibrates in the first direction X, respectively. Accordingly, the first viscoelastic member 910 and the second viscoelastic member 920 reliably follow the movement of the movable body 3, so that the resonance of the movable body 3 can be effectively prevented.

During the period when the drive mechanism 5 is stopped, the first viscoelastic member 910 and the second viscoelastic member 920 are each compressed in the first direction X. For this reason, since the 1st viscoelastic member 910 and the 2nd viscoelastic member 920 follow the movement of the movable body 3 reliably, the resonance of the movable body 3 can be prevented effectively. In addition, when the movable body 3 vibrates, the first viscoelastic member 910 and the second viscoelastic member 920 always exert a force to extend within a predetermined stroke, so that the first viscoelastic member 910 and the second viscoelastic member 910 are secondly extended. The viscoelastic member 920 exhibits a stable damper function. That is, when the viscoelastic member is pressed in the thickness direction (axial direction) and compressively deformed, the viscoelastic member 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), it has an expansion / contraction characteristic in which a linear component (spring coefficient) is larger than a non-linear component (spring coefficient). Therefore, when the first viscoelastic member 910 and the second viscoelastic member 920 are compressed in the first direction X as in the present embodiment, the first viscoelastic member 910 and the second viscoelastic member 920 The spring force according to the direction of movement is constant. Therefore, as in this embodiment, the reproducibility of the vibration acceleration with respect to the input signal can be improved, so that vibration with a delicate nuance can be realized.

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

  X ... 1st direction, Y ... 2nd direction, Z ... 3rd direction, 1 ... Actuator, 2 ... Support body, 3 ... Movable body, 5 ... Drive mechanism, 5a ... Movable body side component, 5b ... Support body side component , 8 ... Guide mechanism, 21 ... Base member, 22 ... Holder part, 23 ... First convex part, 24 ... Second convex part, 25 ... Cover, 30 ... Frame body, 31 ... First wall part, 32 ... Second Wall part 33 ... 3rd wall part 34 ... 4th wall part 38 ... Output member 51 ... 1st magnetic core 52 ... 2nd magnetic core 54 ... Armature 55 ... Bobbin 56 ... Permanent magnet 57 ... first armature core, 58 ... second armature core, 59 ... drive coil, 80 ... guide unit, 81 ... first rail, 82 ... second rail, 83 ... rolling ball, 91 ... first elastic member , 92 ... second elastic member, 221 to 226 ... columnar part, 250 ... flat plate part, 250a ... opening part, 251 ... first Side plate portion, 252 ... second side plate portion, 310, 320 ... inner surface, 315, 325 ... bottom plate portion, 316, 317, 318, 326, 327, 328 ... shaft portion, 511 ... first salient pole, 521 ... second projection Pole, 540 ... Armature unit, 571, 581 ... Engaging recess, 910 ... First viscoelastic member, 920 ... Second viscoelastic member

Claims (8)

A support;
A movable body,
A drive mechanism for vibrating the movable body in a first direction with respect to the support;
A first viscoelastic member provided on a portion of the movable body facing the support on one side in the first direction;
A second viscoelastic member provided on a portion of the movable body facing the support on the other side in the first direction;
An actuator comprising: The first viscoelastic member is provided at a portion where one end in the first direction of the movable body and the support is opposed to each other in the first direction,
The said 2nd viscoelastic member is provided in the part which the edge parts of the other side of the said 1st direction of the said movable body and the said support body oppose in the said 1st direction. The actuator described.   3. The first viscoelastic member and the second viscoelastic member are in contact with the support and the movable body, respectively, when the movable body vibrates in the first direction. Actuator.   4. The actuator according to claim 3, wherein the first viscoelastic member and the second viscoelastic member are each compressed in the first direction while the driving mechanism is stopped. 5. The drive mechanism is disposed in a portion where the movable body and the support body face each other in a second direction intersecting the first direction,
The support is a holder that holds a base member and a support-side component for projecting from the base member to one side in a third direction that intersects the first direction and the second direction to form the drive mechanism. A first protrusion projecting from the base member to one side in the third direction on one side in the first direction with respect to the holder part, and the other side in the first direction with respect to the holder part And a second convex portion protruding in one of the third directions from the base member,
The movable body includes a first wall portion facing the holder portion on one side in the second direction, a second wall portion facing the holder portion on the other side in the second direction, and the first convex portion. A third wall portion facing on one side in the first direction, and a fourth wall portion facing the second convex portion on the other side in the first direction,
A part of the movable body side component for configuring the drive mechanism is arranged so as to overlap the surface of the first wall portion facing the holder portion, and the surface of the second wall portion facing the holder portion is arranged. Another part of the movable body side component is disposed so as to overlap, the first viscoelastic member is disposed between the first convex portion and the third wall portion, and the second convex portion and the first convex portion are disposed. The actuator according to any one of claims 1 to 4, wherein the second viscoelastic member is disposed between four wall portions.   The movable body is connected to at least one of the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion to move the drive mechanism in the third direction. The actuator according to claim 5, further comprising an output member that covers from one side. One end portion of the first wall portion in the first direction, one end portion of the first wall portion in the first direction, and one end portion of the second wall portion in the first direction. And a guide mechanism for guiding the movable body in the first direction is provided at each of a total of four locations on the other end of the second wall in the first direction. Item 7. The actuator according to Item 5 or 6.   The actuator according to claim 7, wherein the guide mechanism includes a rolling ball supported from both sides in the second direction by the movable body and the support body at each of the four locations.

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