JP2020203247A - Actuator and tactile device - Google Patents

Abstract

To provide an actuator which makes drive sound less likely to occur even if a thickness of a flat plate part of a cover member is reduced, and to provide a tactile device.SOLUTION: In an actuator 1, a movable body 6 is disposed between a first flat plate part 310 of a first cover member 31 and a second flat plate part 320 of a second cover member 32 and the movable body 6 is vibrated to output information. The first flat plate part 310 is provided with a first projection part 316 which extends so as to partition the first flat plate part 310 into multiple areas. Between the movable body 6 and the first flat plate part 310, first viscoelastic members 91 are disposed at the areas partitioned by the first projection part 316. In the first flat plate part 310, a groove 317 is formed at the opposite side of the first projection part 316. In the groove 317, a filling member 16 formed by a rigid member or an elastic member may be disposed. The second flat plate part 320 of the second cover member 32 has a similar structure to the first flat plate part 310.SELECTED DRAWING: Figure 6

Description

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

As a device for transmitting information by vibration, an actuator in which a movable body and a magnetic drive circuit are provided between a first flat plate portion of the first cover member and a second flat plate portion of the second cover member has been proposed. In such an actuator, a connecting member having viscoelasticity is arranged between the movable body and the first flat plate portion of the first cover member, and between the movable body and the second flat plate portion of the second cover member. (See Patent Document 1). Therefore, when a drive signal such as a sine wave signal is supplied to the coil of the magnetic drive circuit, the movable body vibrates.

JP-A-2019-13094

In the actuator described in Patent Document 1, for example, when the first flat plate portion of the first cover member is made thinner to make the actuator thinner, a pulse signal with a steep voltage change is supplied to the coil as a drive signal. There is a problem that a driving sound is generated due to the vibration of the first flat plate portion when the movable body vibrates.

In view of the above problems, an object of the present invention is to provide an actuator and a tactile device in which a driving sound is unlikely to be generated even if the flat plate portion of the cover member is made thin.

In order to solve the above problems, the actuator of the present invention has a first cover member provided with a first flat plate portion and a second cover member provided with a second flat plate portion facing the first flat plate portion in the first direction. A support provided with, a movable body arranged between the first flat plate portion and the second flat plate portion, and at least one of elastic and viscoelastic, connected to both the movable body and the support. The connecting member is provided with a magnetic drive circuit that vibrates the movable body in a second direction intersecting the first direction with respect to the support, and the first flat plate portion includes the first flat plate portion. It is characterized in that a first ridge portion extending so as to divide the portion into a plurality of areas is provided.

Such an actuator can be used as a tactile device or the like. That is, the tactile device of the present invention is a support having a first cover member having a first flat plate portion and a second cover member having a second flat plate portion facing the first flat plate portion in the first direction. A movable body arranged between the first flat plate portion and the second flat plate portion, and a connecting member having at least one of elasticity and viscoelasticity and connected to both the movable body and the support. The first flat plate portion includes a magnetic drive circuit that vibrates the movable body with respect to the support in a second direction intersecting the first direction according to information to be output. It is characterized in that a first ridge portion extending so as to partition the first flat plate portion into a plurality of areas is provided.

In the present invention, even when the first flat plate portion of the first cover member is thinned, the first flat plate portion extends from the first flat plate portion so as to partition the first flat plate portion into a plurality of regions. Is provided, so that the first flat plate portion does not easily vibrate. Therefore, even when a drive signal with a steep voltage change is supplied to the magnetic drive circuit to vibrate the movable body, it is unlikely that a drive sound is generated due to the vibration of the first flat plate portion.

In the present invention, the first ridge portion can adopt a mode in which the second flat plate portion projects toward the side where the second flat plate portion is located. According to this aspect, the dimension of the actuator in the first direction can be shortened as compared with the case where the first ridge portion protrudes toward the side opposite to the second flat plate portion.

In the present invention, the connecting member adopts an embodiment of the first flat plate portion including a first viscoelastic member arranged between a region partitioned by the first ridge portion and the movable body. be able to. According to this aspect, since the first viscoelastic member can be connected to the flat plate portion of the first flat plate portion avoiding the first ridge portion, the viscoelastic property of the first viscoelastic member is unlikely to fluctuate. ..

In the present invention, the mode in which the first ridge portion reaches the end portion of the first flat plate portion can be adopted. According to this aspect, since the first flat plate portion can be appropriately partitioned, the vibration of the first flat plate portion can be effectively suppressed.

In the present invention, the first flat plate portion is a rectangle having a pair of long side portions facing each other and a pair of short side portions facing each other between the pair of long side portions, and the first protrusion. As the portion, at least the central portion in the direction in which the pair of long side portions extend can be adopted so as to extend in the direction along the pair of short side portions. According to such an aspect, since the first flat plate portion can be divided in the long side direction, the vibration of the first flat plate portion can be effectively suppressed.

In the present invention, the first flat plate portion can adopt a mode in which the opposite side of the first ridge portion is a groove. According to this aspect, when the first cover member is manufactured by press working, the first ridge portion can be formed at the same time.

In the present invention, an embodiment in which a filling member is provided inside the groove can be adopted. According to such an aspect, the vibration characteristic of the first flat plate portion can be optimized by the filling member. For example, the filling member may adopt an aspect of being a rigid member. According to this aspect, the rigidity member arranged in the groove can increase the rigidity of the first flat plate portion and obtain the same effect as when the mass of the first flat plate portion is increased, and the first flat plate portion can be obtained. Vibration can be effectively suppressed. Further, the filling member may adopt an aspect of being an elastic member. According to such an aspect, the vibration of the first flat plate portion can be effectively suppressed by absorbing the vibration of the first flat plate portion by the elastic member arranged in the groove.

In the present invention, the first flat plate portion may adopt an aspect made of an iron-based metal. According to this aspect, it is easy to suppress the vibration of the first flat plate portion.

In the present invention, it is possible to adopt an embodiment in which the second flat plate portion is provided with a second ridge portion extending so as to partition the second flat plate portion into a plurality of regions. According to this aspect, even when the second flat plate portion of the second cover member is made thin, the second flat plate portion is unlikely to vibrate. Therefore, it is unlikely that a driving sound is generated due to the vibration of the second flat plate portion.

In the present invention, the second ridge portion can adopt a mode in which the first flat plate portion projects toward the side where the first flat plate portion is located. According to this aspect, the dimension of the actuator in the first direction can be shortened as compared with the case where the second ridge portion protrudes toward the side opposite to the first flat plate portion.

In the present invention, the connecting member adopts an aspect including a second viscoelastic member arranged between the region partitioned by the second ridge portion and the movable body in the second flat plate portion. be able to. According to this aspect, since the second viscoelastic member can be connected to the flat plate portion of the second flat plate portion avoiding the second ridge portion, the viscoelastic property of the second viscoelastic member is unlikely to fluctuate. ..

In the present invention, even when the first flat plate portion of the first cover member is thinned, the first flat plate portion extends from the first flat plate portion so as to partition the first flat plate portion into a plurality of regions. Is provided, so that the first flat plate portion does not easily vibrate. Therefore, even when a drive signal with a steep voltage change is supplied to the magnetic drive circuit to vibrate the movable body, it is unlikely that a drive sound is generated due to the vibration of the first flat plate portion.

The perspective view of the actuator to which this invention was applied seen from the side of the 2nd cover member. FIG. 3 is a perspective view showing a state in which the filling member is removed from the state shown in FIG. A perspective view of the actuator shown in FIG. 1 as viewed from the side of the first cover member. FIG. 5 is a YZ cross-sectional view of the actuator shown in FIG. XZ sectional view of the actuator shown in FIG. An exploded perspective view of the actuator 1 shown in FIG. An exploded perspective view of the magnetic drive circuit shown in FIG. The perspective view of the coil holder and the like shown in FIG. FIG. 5 is a perspective view showing a state in which the coil is removed from the coil holder shown in FIG. Explanatory drawing of the actuator which concerns on the modification of embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the side where the first flat plate portion 310 of the first cover member 31 and the second flat plate portion 320 of the second cover member 32 face each other is defined as the first direction Z, and is movable so as to intersect the first direction Z. The vibration direction of the body 6 will be referred to as the second direction X, and the direction intersecting the first direction Z and the second direction X will be described as the third direction Y. Further, X1 is attached to one side of the second direction X, X2 is attached to the other side of the second direction X, Z1 is attached to one side of the first direction Z, and Z2 is attached to the other side of the first direction Z. , Y1 is attached to one side of the third direction Y, and Y2 is attached to the other side of the third direction Y. Further, in the following description, the case where the coil 5 is held by the support 2 and the permanent magnets (the first permanent magnet 91 and the second permanent magnet 92) are held by the movable body 6 will be mainly described.

(overall structure)
FIG. 1 is a perspective view of the actuator 1 to which the present invention is applied as viewed from the side of the second cover member 32. FIG. 2 is a perspective view showing a state in which the filling members 16 and 17 are removed from the state shown in FIG. FIG. 3 is a perspective view of the actuator 1 shown in FIG. 1 as viewed from the side of the first cover member 31. FIG. 4 is a YZ cross-sectional view of the actuator 1 shown in FIG. FIG. 5 is an XZ cross-sectional view of the actuator 1 shown in FIG. FIG. 6 is an exploded perspective view of the actuator 1 shown in FIG. Note that in FIGS. 3, 4, 5, and 6, the filling members 16 and 17 are not shown.

As shown in FIGS. 1, 2, and 3, the actuator 1 has a rectangular parallelepiped shape in which the longitudinal direction is directed to the third direction Y, and can be used as an information transmission device such as a tactile device. When the actuator 1 is used as a tactile device, information is notified to the user holding the actuator 1 by vibration in the second direction X. Therefore, the actuator 1 can be used as an operating member of a game machine or the like, and a new sensation can be felt by vibration or the like. However, the application of the actuator 1 is not limited to an information transmission device such as a tactile device. As shown in FIGS. 4, 5 and 6, the actuator 1 of the present embodiment has a support 2 including a square cover 3 and the like that define the outer shape of the actuator 1, and a support 2 inside the cover 3. It has a movable body 6 movably supported in the second direction X, and outputs information by vibrating the movable body 6 in the second direction X.

The support 2 includes a cover 3, a coil holder 4, a first plate 47, and a second plate 48. It has a coil 5 and a power feeding board 10, and the movable body 6 has a permanent magnet (first permanent magnet 71 and a second permanent magnet 72) and a yoke (first yoke 81 and second yoke 82). The magnetic drive circuit 1a is composed of a coil 5 and permanent magnets (first permanent magnet 71 and second permanent magnet 72). Further, the movable body 6 is supported by the support body 2 via a connecting member 9 provided between the movable body 6 and the support body 2. The connecting member 9 has at least one of elasticity and viscoelasticity, and the movable body 6 is supported by the connecting member 9 so as to be relatively movable relative to the support body 2.

(Structure of movable body 6)
FIG. 7 is an exploded perspective view of the magnetic drive circuit 1a shown in FIG. As shown in FIGS. 4 and 5, the movable body 6 has a first yoke 81 made of a magnetic plate arranged on one side Z1 of the first direction Z with respect to the coil 5, and a first yoke 81 with respect to the coil 5. It has a first permanent magnet 71 held on the surface of the other side Z2 of the first direction Z of the first yoke 81 so as to face each other on one side Z1 of the direction Z. Further, the movable body 6 faces the coil 5 with the second yoke 82 made of a magnetic plate arranged on the other side Z2 of the first direction Z on the other side Z2 of the first direction Z. It has a second permanent magnet 72 held on the surface of one side Z1 of the first direction Z of the second yoke 82.

As shown in FIGS. 4, 5, and 7, the first yoke 81 includes a flat plate portion 811 in which the first permanent magnet 71 is fixed to the surface of the other side Z2 in the first direction Z, and a flat plate portion 811. It has a pair of connecting portions 812 that are bent from both end portions in the three directions Y to the other side Z2 in the first direction Z. The second yoke 82 has a flat plate portion 821 in which the second permanent magnet 72 is fixed to the surface of one side Z1 of the first direction Z, and both ends of the flat plate portion 821 in the third direction Y are first yokes. The pair of connecting portions 812 of 81 are connected to the ends of Z2 on the other side of the first direction Z by a method such as welding (see FIG. 6).

The first permanent magnet 71 is composed of two plate-shaped magnet pieces 711 and 712 arranged in the second direction X via a non-magnetic spacer 710. The magnet pieces 711 and 712 are magnetized to different poles in the first direction Z, respectively. Further, the magnet pieces 711 and 712 are magnetized in opposite directions in the first direction Z, respectively. Therefore, the magnet piece 711 has the north pole directed to the other side Z2 of the first direction Z, while the magnet piece 712 has the south pole directed to the other side Z2 of the first direction Z.

Like the first permanent magnet 71, the second permanent magnet 72 is composed of two plate-shaped magnet pieces 721 and 722 arranged in the second direction X via a non-magnetic spacer 720. The magnet pieces 721 and 722 are magnetized to different poles in the first direction Z, respectively. Further, the magnet pieces 721 and 722 are magnetized in opposite directions in the first direction Z, respectively. Therefore, the magnet piece 721 has the S pole directed to one side Z1 of the first direction Z, while the magnet piece 722 has the north pole directed to one side Z1 of the first direction Z. Therefore, the first permanent magnet 71 and the second permanent magnet 72 are magnetized at different poles at portions facing each other in the first direction Z via the coil 5.

(Structure of support 2)
FIG. 8 is a perspective view of the coil holder 4 and the like shown in FIG. FIG. 9 is a perspective view showing a state in which the coil 5 is removed from the coil holder 4 shown in FIG. As shown in FIGS. 4, 5 and 6, in the support 2, the cover 3 has a first cover member 31 located on one side Z1 of the first direction Z and a second cover 3 on the other side Z2 of the first direction Z. It has a second cover member 32 that overlaps with one cover member 31. The first cover member 31 and the second cover member 32 are made of stainless steel such as SUS304 or an iron-based metal having a higher iron content than stainless steel. In this embodiment, the first cover member 31 and the second cover member 32 are made of an iron-based metal having a higher iron content than stainless steel.

The first cover member 31 is a rectangular first flat plate portion 310 facing the flat plate portion 811 of the first yoke 81 on one side Z1 of the first direction Z, and a pair of long side portions facing each other of the first flat plate portion 310. From each of the pair of side plate portions 311 and 312 bent toward the other side Z2 of the first direction Z and the pair of opposite short side portions of the first flat plate portion 310, the other side Z2 of the first direction Z It has a pair of side plate portions 313 and 314 that are bent toward.

The second cover member 32 is a rectangular second flat plate portion 320 facing the flat plate portion 821 of the second yoke 82 on the other side Z2 of the first direction Z, and a pair of long side portions facing each other of the second flat plate portion 320. One side Z1 of the first direction Z from each of the pair of side plate portions 321 and 322 bent toward the one side Z1 of the first direction Z and the pair of opposite short side portions of the first flat plate portion 310. It has a pair of side plate portions 323 and 324 that are bent toward.

A hole 323a is formed in the side plate portion 323, while a plate portion 313a that fits in the hole 323a is cut out in the side plate portion 313 toward the outside. A hole 324a is formed in the side plate portion 324, while a plate portion 314a that fits in the hole 324a is cut out in the side plate portion 314 toward the outside. Therefore, when the first cover member 31 and the second cover member 32 are overlapped in the first direction Z, the side plate portions 323 and 324 overlap the side plate portions 313 and 314 from the outside in the third direction Y, respectively, and the plate portion 313a becomes It fits into the hole 323a, and the plate portion 314a fits into the hole 324a. In this state, the first cover member 31 and the second cover member 32 are fixed by a method such as adhesion to form the cover 3.

Notches 311a and 312a are formed in the side plate portions 311 and 312, and notches 321a and 322a are formed in the side plate portions 321 and 322. Therefore, when the first cover member 31 and the second cover member 32 are combined, an opening is formed between the side plate portions 311 and 321 and a part of the coil holder 4 described later is formed from the opening. It will be in a protruding state. Further, when the first cover member 31 and the second cover member 32 are combined, an opening is formed between the side plate portions 312 and 222, and a part of the coil holder 4 described later is formed from the opening. It will be in a protruding state.

As shown in FIGS. 4 and 5, in the support 2, a resin coil holder 4 holding the coil 5 is arranged inside the cover 3. As shown in FIG. 7, the coil holder 4 is arranged between the first permanent magnet 71 and the second permanent magnet 72 in the first direction Z. Further, the coil holder 4 is arranged between the pair of connecting portions 812 of the first yoke 81 in the third direction Y.

As shown in FIGS. 8 and 9, the coil 5 is an air-core coil having an annular planar shape wound in an oval shape, and extends in parallel in the second direction X in the third direction Y. It includes two long side portions 51 and two arc-shaped short side portions 52 connecting both ends of the two long side portions 51 in the third direction Y. With respect to the coil 5 configured in this way, the first permanent magnet 71 faces the long side portion 51 on one side Z1 of the first direction Z, and the second permanent magnet 72 on the other side Z2 of the first direction Z. Are facing each other.

The coil holder 4 is one of a rectangular plate portion 41 through which a coil arrangement hole 410 formed of an oval through hole in which the coil 5 is arranged is arranged in the first direction Z in the first direction Z and a second direction X of the plate portion 41. The first side plate portion 42 protruding from both sides of the first direction Z at the end portion (long side portion) of the side X1 and the first end portion (long side portion) of the other side X2 of the plate portion 41 in the second direction X. It has a second side plate portion 43 protruding on both sides in the direction Z. The first side plate portion 42 and the second side plate portion 43 are respectively fixed to the side plate portions 311 and 312 of the first cover member 31 by a method such as adhesion.

In the present embodiment, each of the four corners of the plate portion 41 has a columnar protrusion 44 protruding from the plate portion 41 on both sides in the first direction Z along each of the first side plate portion 42 and the second side plate portion 43. Is provided.

The first side plate portion 42 is formed with a protruding portion 420 projecting to one side X1 of the second direction X to form a step portion 421, and the power feeding board 10 is in contact with the step portion 421. It is fixed to the side plate portion 42 by a method such as adhesion. A slit 425 is formed at the end of the other side Z2 of the first side plate portion 42 in the first direction Z to pass the coil wire drawn from the coil 5 toward the land 11 of the power feeding board 10. The protruding portion 420 is exposed from the notches 311a and 321a of the side plate portions 311 and 321 toward one side X1 of the second direction X. Therefore, the power feeding board 10 is also exposed toward one side X1 of the second direction X.

As shown in FIG. 3, the second side plate portion 43 is formed with protrusions 430 protruding from the other side X2 of the second direction X at two positions separated in the third direction Y, and the protrusions 430 are formed at two positions. It is in a state of being exposed from the notches 312a and 322a of the side plate portions 312 and 322 toward the other side X2 in the second direction X. Therefore, the first cover member 31 and the second cover member 32 are positioned in the first direction Z with the protruding portions 420 and 430 of the coil holder 4 sandwiched therein.

As shown in FIGS. 7 and 8, the support 2 has a first plate 47 that overlaps the coil arrangement hole 410 and the plate portion 41 from one side Z1 of the first direction Z, and at least the air core of the coil 5 is formed. The coil 5 is fixed to the first plate 47 and the plate portion 41 by an adhesive (not shown) filled in the portion. Therefore, the coil 5 faces the first permanent magnet 71 via the first plate 47 in the first direction Z. Further, the first plate 47 is fixed to the plate portion 41 by an adhesive.

The support 2 has a second plate 48 that overlaps the coil arrangement hole 410 and the plate portion 41 from the other side Z2 in the first direction Z, and the coil is formed by at least the adhesive filled in the air core portion of the coil 5. 5 is fixed to the second plate 48. Therefore, the coil 5 faces the second permanent magnet 72 via the second plate 48 in the first direction Z. Further, the second plate 48 is fixed to the plate portion 41 by an adhesive.

The first plate 47 and the second plate 48 are made of a substantially rectangular metal plate having substantially the same size as the plate portion 41. In this embodiment, the first plate 47 and the second plate 48 are made of a non-magnetic stainless steel plate.

The first plate 47 has a claw-shaped engaging portion 472 that projects diagonally from both sides of the second direction X to one side Z1 of the first direction Z at each of the four corner portions, and is a first plate. When the 47 is overlapped with the plate portion 41 from one side Z1 of the first direction Z, the engaging portion 472 elastically contacts the protruding portion 44 and the first side plate portion 42, and the first plate 47 temporarily touches the coil holder 4. It is fixed. Further, the second plate 48 has a claw-shaped engaging portion 472 that obliquely protrudes from both sides of the second direction X to one side Z1 of the first direction Z at each of the four corner portions. When 1 plate 47 is superposed on the plate portion 41 from one side Z1 of the first direction Z, the engaging portion 472 elastically contacts the protruding portion 44 and the first side plate portion 42, and the second plate 48 is a coil holder. Temporarily fixed to 4.

The first plate 47 has a bent portion 473 bent to the other side Z2 of the first direction Z at both ends of the third direction Y, and a bent portion 474 bent to one side Z1 of the first direction Z at both ends of the second direction X. And have. The second plate 48 has a bent portion 483 bent to one side Z1 of the first direction Z at both ends of the third direction Y and a bent portion 484 bent to the other side Z2 of the first direction Z at both ends of the second direction X. And have. Therefore, the bending portions 473, 474, 483, and 484 of the first plate 47 and the second plate 48 increase the strength against bending.

As described above, in the actuator 1 of the present embodiment, the coil 5 is arranged inside the coil arrangement hole 410 of the plate portion 41 of the coil holder 4, and one of the first directions Z is arranged in the coil arrangement hole 410 and the plate portion 41. The first plate 47 is fixed to the coil holder 4 so as to overlap from the side Z1. Therefore, when the air core portion of the coil 5 is filled with an adhesive, the adhesive is applied between the coil 5 and the coil holder 4, between the coil 5 and the first plate 47, and between the first plate 47 and the coil holder 4. It flows in between. Therefore, when the adhesive is cured, the coil 5, the first plate 47, and the coil holder 4 are fixed by the adhesive layer. Therefore, unlike the case where the adhesive is poured into the gap between the outer peripheral surface of the coil 5 and the inner peripheral surface of the coil arrangement hole 410, the coil 5 arranged in the coil arrangement hole 410 of the coil holder 4 is properly aligned with the coil holder 4. Can be glued. Further, the first plate 47 is interposed between the first permanent magnet 71 and the coil 5. Therefore, even when the movable body 6 moves to one side Z1 of the first direction Z, the first permanent magnet 71 and the coil 5 do not come into direct contact with each other, so that the coil 5 is less likely to be damaged.

Further, when the second plate 48 is overlapped after filling the air core portion of the coil 5 with an adhesive, the adhesive is applied between the coil 5 and the coil holder 4, between the coil 5 and the first plate 47, and between the coil 5 and the first plate 47. It flows smoothly between the first plate 47 and the coil holder 4, and also flows between the coil 5 and the second plate 48, and between the second plate 48 and the coil holder 4. Therefore, when the adhesive is cured, the coil 5, the first plate 47, the second plate 48, and the coil holder 4 are fixed by the adhesive layer. In this state, the second plate 48 is interposed between the second permanent magnet 72 and the coil 5. Therefore, even when the movable body 6 moves to the other side Z2 in the first direction Z, the second permanent magnet 72 and the coil 5 do not come into direct contact with each other, so that the coil 5 is less likely to be damaged.

Further, since the first plate 47 and the second plate 48 are made of a non-magnetic material, the magnetic flux from the first permanent magnet 71 and the magnetic flux of the second permanent magnet 72 are affected by the first plate 47 and the second plate 48. It will be chained with the coil 5 without receiving. Further, since the first plate 47 and the second plate 48 are made of metal plates, the heat generated by the coil 5 can be efficiently dissipated through the first plate 47 and the second plate 48. Further, since the first plate 47 and the second plate 48 are made of stainless steel plates, the first plate 47 and the second plate 48 have sufficient strength even when the plate thickness is thin.

Further, the first plate 47 and the second plate 48 are temporarily fixed to the coil holder 4 by the engaging portions 472 and 482, respectively. Therefore, it is not necessary to support the first plate 47 and the second plate 48 with a jig until the adhesive is cured.

(Structure of connecting member 9)
As shown in FIGS. 4, 5, and 6, the movable body 6 is supported by a connecting member 9 connected to both the movable body 6 and the support 2 between the movable body 6 and the support 2. Is supported by. In this embodiment, the connecting member 9 has at least one of elasticity and viscoelasticity. Therefore, the movable body 6 is movably supported by the support 2 in the second direction X and the third direction Y. In this embodiment, the connecting member 9 is made of a member having viscoelasticity. Therefore, the movable body 6 can be movably supported in the second direction X without using a plate-shaped spring or the like, and the resonating of the movable body 6 can be suppressed.

In the present embodiment, the connecting member 9 includes a first viscoelastic member 91 in which the first yoke 81 and the first flat plate portion 310 face each other in the first direction Z, and the second yoke 82 and the second flat plate portion. It includes a second viscoelastic member 92 arranged at a portion facing the 320 in the first direction Z. In the present embodiment, the connecting member 9 is composed of a first viscoelastic member 91 and a second viscoelastic member 92. The first viscoelastic member 91 and the second viscoelastic member 92 are respectively arranged at two positions separated in the third direction Y.

In this embodiment, the first viscoelastic member 91 and the second viscoelastic member 92 are gel-like members made of silicone gel or the like. In the present embodiment, the first viscoelastic member 91 and the second viscoelastic member 92 are made of a silicone gel having a needle insertion degree of 90 degrees to 110 degrees. The degree of needle insertion is the depth at which a 1/4 cone needle with a total load of 9.38 g at 25 ° C. enters for 5 seconds, as defined by JIS-K-2207 and JIS-K-2220. Is a value expressed in units of 1/10 mm, and the smaller this value is, the harder it is. The connection between the first viscoelastic member 91 and the first yoke 81, the connection between the first viscoelastic member 91 and the first flat plate portion 310, the connection between the second viscoelastic member 92 and the second yoke 82, and the second The connection between the viscoelastic member 92 and the second flat plate portion 320 is performed by utilizing the adhesiveness of an adhesive, an adhesive, or a silicone gel.

(basic action)
In the actuator 1 of this embodiment, when a drive signal corresponding to the information to be output is supplied to the coil 5 from the outside (upper device) via the power supply board 10, the coil 5, the first permanent magnet 71 and the second permanent magnet 72 are supplied. The movable body 6 reciprocates in the second direction X by the magnetic drive circuit 1a provided with the above. Therefore, the user holding the actuator 1 in his / her hand can obtain information by the vibration from the actuator 1. At that time, the frequency of the signal waveform applied to the coil 5 is changed according to the information to be transmitted. Further, the polarity of the signal waveform applied to the coil 5 is inverted, and at that time, a difference in speed is provided with respect to the change in voltage between the period when the polarity of the drive signal is negative and the period when the polarity is positive. As a result, there is a difference between the acceleration when the movable body 6 moves to one side X1 of the second direction X and the acceleration when the movable body 6 moves to the other side X2 of the second direction X. Therefore, the actuator 1 can make the user feel as if moving to one side X1 or the other side X2 of the second direction X as a tactile device.

Here, the first viscoelastic member 91 and the second viscoelastic member 92 are positioned so as to face each other in the first direction Z intersecting the second direction X (vibration direction) between the support 2 and the movable body 6. It is provided in. Therefore, when the movable body 6 vibrates in the second direction X, it is deformed in the shearing direction to prevent resonance. Therefore, even if the movable body 6 vibrates in the second direction X, the change in the elastic modulus of the first viscoelastic member 91 and the second viscoelastic member 92 is small, so that the resonance of the movable body 6 can be effectively suppressed. Can be done.

That is, the connecting member 9 (first viscoelastic member 91 and second viscoelastic member 92) is a viscoelastic member (plate-shaped gel-like member) and has linear or non-linear stretching characteristics depending on the stretching direction thereof. .. For example, when the first viscoelastic member 91 and the second viscoelastic member 92 are pressed in the thickness direction (axial direction) and compressed and deformed, the expansion and contraction in which the non-linear component is larger than the linear component (spring constant). On the other hand, when it is pulled and stretched in the thickness direction (axial direction), it has a viscoelastic characteristic in which the linear component (spring constant) is larger than the non-linear component (spring constant). Further, when the first viscoelastic member 91 and the second viscoelastic member 92 are deformed in a direction (shearing direction) intersecting the thickness direction (axial direction), the direction in which the first viscoelastic member 91 and the second viscoelastic member 92 are pulled and stretched regardless of which direction they move. Since it is a deformation of, the linear component (spring coefficient) has a larger deformation characteristic than the non-linear component (spring coefficient). In this embodiment, when the movable body 6 vibrates in the second direction X, the first viscoelastic member 91 and the second viscoelastic member 92 are deformed in the shearing direction. Therefore, in the first viscoelastic member 91 and the second viscoelastic member 92, when the movable body 6 vibrates in the second direction X, the spring force in the direction of movement becomes constant. Therefore, by using the spring elements in the shear direction of the first viscoelastic member 91 and the second viscoelastic member 92, the reproducibility of the vibration acceleration with respect to the input signal can be improved, and the vibration is realized with a delicate nuance. can do.

In the present embodiment, both sides of the first viscoelastic member 91 and the second viscoelastic member 92 in the first direction Z are connected to the movable body 6 and the support 2 by a method such as adhesion. Therefore, since the first viscoelastic member 91 and the second viscoelastic member 92 surely follow the movement of the movable body 6, the resonance of the movable body 6 can be effectively prevented. Further, the first viscoelastic member 91 and the second viscoelastic member 92 are in a state of being compressed in the first direction Z between the support 2 and the movable body 6. Therefore, since the first viscoelastic member 91 and the second viscoelastic member 92 surely follow the movement of the movable body 6, the resonance of the movable body 6 can be effectively prevented.

Further, in the present embodiment, a hit portion is provided that defines a movable range when the movable body 6 moves in the second direction X and the third direction Y due to an impact from the outside. More specifically, when the movable body 6 moves in the second direction X due to an external impact, the first yoke 81 and the second yoke 82 are attached to the first side plate portion 42 of the coil holder 4 or the coil holder 4. By abutting on the second side plate portion 43, the movable range of the movable body 6 in the second direction X is defined. Further, when the movable body 6 moves in the third direction Y due to an external impact, the connecting portion 812 of the first yoke 81 is attached to the plate portion 41 of the coil holder 4, and the bent portions of the first plate 47 and the second plate 48. The movable range of the movable body 6 in the third direction Y is defined by abutting through 473 and 483.

(Detailed configuration of the first cover member 31 and the second cover member 32)
As shown in FIG. 6, in the actuator 1 of the present embodiment, the first flat plate portion 310 of the first cover member 31 has a rib-shaped first plate portion 310 extending so as to partition the first flat plate portion 310 into a plurality of regions. A ridge portion 316 is provided. In this embodiment, the first ridge portion 316 reaches the end portion of the first flat plate portion 310.

In the present embodiment, the first flat plate portion 310 is a rectangle having a pair of long side portions facing each other and a pair of short side portions facing each other between the pair of long side portions, and the first ridge portion 316. Is a central portion in the direction in which the pair of long side portions extends, and extends in the direction along the pair of short side portions. Therefore, the first ridge portion 316 divides the first flat plate portion 310 into two equal parts in the direction in which the long side portion extends, and the two first viscoelastic members 91 are each of the first flat plate portion 310. Of these, it is arranged between the two areas partitioned by the first ridge portion 316 and the movable body 6.

According to this configuration, even when the first flat plate portion 310 of the first cover member 31 is thinned, the first flat plate portion 310 is divided into a plurality of regions by the first ridge portion 316. The rigidity of the first flat plate portion 310 can be increased, and vibration is less likely to occur. Therefore, when the first flat plate portion 310 of the first cover member 31 is thinned to reduce the thickness of the actuator 1, the drive signal supplied to the coil 5 is a pulse signal or the like whose voltage change is steep. However, it is unlikely that a driving sound is generated due to the vibration of the first flat plate portion 310. In particular, in the present embodiment, the first ridge portion 316 divides the rectangular first flat plate portion 310 into two equal parts in the long side direction, so that the first flat plate portion 310 is less likely to vibrate. Further, since the first cover member 31 is entirely made of iron-based metal including the first flat plate portion 310, it is easy to suppress the vibration of the first flat plate portion 310. Therefore, it is unlikely that a driving sound is generated due to the vibration of the first flat plate portion 310.

In the present embodiment, the first flat plate portion 310 has a groove 317 on the opposite side of the first ridge portion 316. More specifically, in the production of the first cover member 31, press processing such as drawing processing is performed on the metal plate, but in this embodiment, in the press processing for producing the first cover member 31, the first cover member 31 is produced. 1 The ridge portion 316 is formed at the same time. Therefore, the first flat plate portion 310 is formed with a groove 317 on the opposite side of the first ridge portion 316.

In the present embodiment, the first ridge portion 316 projects toward the side (inside) where the second flat plate portion 320 is located. Therefore, a groove 317 extending so as to overlap the first ridge portion 316 is formed on the surface (outer surface) of the first flat plate portion 310 on the side opposite to the side on which the second flat plate portion 320 is located. Therefore, the dimension of the actuator 1 in the first direction Z can be shortened as compared with the case where the first ridge portion 316 protrudes outward.

Further, since each of the two first viscoelastic members 91 is connected to the flat plate portion of the first flat plate portion 310 avoiding the first ridge portion 316, the deformation caused by the first ridge portion 316 is caused. It has not occurred. Therefore, the viscoelastic property of the first viscoelastic member 91 is unlikely to fluctuate.

Further, in the present embodiment, as shown in FIGS. 1 and 2, a filling member 16 is provided inside the groove 317, and the filling member 16 is in contact with the inner surface of the groove 317 over the entire area of the groove 317. Therefore, the filling member 16 can be used to optimize the vibration characteristics of the first flat plate portion 310. Therefore, it is unlikely that a driving sound is generated due to the vibration of the first flat plate portion 310.

For example, when a rigid member made of a metal such as iron or copper or a rigid member made of a rigid resin member in which the metal is dispersed is arranged in the groove 317 as the filling member 16, the rigidity of the first flat plate portion 310 is increased. At the same time, the same effect as when the mass of the first flat plate portion 310 is increased can be obtained, and the vibration of the first flat plate portion 310 can be effectively suppressed. Therefore, it is unlikely that a driving sound is generated due to the vibration of the first flat plate portion 310.

Further, when an elastic member such as an elastic resin or a gel-like member is arranged in the groove 317 as the filling member 16, the elastic member arranged in the groove absorbs the vibration of the first flat plate portion 310, whereby the first flat plate portion 310 Vibration can be effectively suppressed. Therefore, it is unlikely that a driving sound is generated due to the vibration of the first flat plate portion 310.

In the actuator 1 of the present embodiment, the second flat plate portion 320 of the second cover member 32 has the same configuration as the first flat plate portion 310. More specifically, the second flat plate portion 320 is provided with a rib-shaped second ridge portion 326 extending so as to partition the second flat plate portion 320 into a plurality of regions, and the second ridge portion 326 is provided. The portion 326 reaches the end of the second flat plate portion 320. Further, the second ridge portion 326 divides the second flat plate portion 320 into two equal parts in the direction in which the long side portion extends, and the two second viscoelastic members 92 are each of the second flat plate portion 320. , It is arranged between the two regions partitioned by the second ridge 326 and the movable body 6.

In the present embodiment, the second ridge portion 326 is formed at the same time during the press working to manufacture the second cover member 32. Therefore, the second flat plate portion 320 is formed with a groove 327 on the opposite side of the second ridge portion 326. In the present embodiment, the second ridge portion 326 protrudes toward the side (inside) where the first flat plate portion 310 is located. Therefore, a groove 327 extending so as to overlap the second ridge portion 326 is formed on the surface (outer surface) of the second flat plate portion 320 on the side opposite to the side where the first flat plate portion 310 is located.

Therefore, also in the second flat plate portion 320, as in the case of the first flat plate portion 310, even if the drive signal supplied to the coil 5 is a pulse signal having a steep voltage change, the vibration of the second flat plate portion 320 is the cause. It has the effect of making it difficult for the driving sound to be generated.

Further, in the present embodiment, as shown in FIGS. 1 and 2, a filling member 17 is provided inside the groove 327, and the filling member 17 is in contact with the inner surface of the groove 327 in the entire area of the groove 327. Therefore, the filling member 17 can be used to optimize the vibration characteristics of the second flat plate portion 320. For example, when a metal or a rigid resin member in which the metal is dispersed is arranged in the groove 327 as the filling member 17, there is an advantage that the rigidity of the second flat plate portion 320 can be increased. On the other hand, when the elastic member is arranged in the groove 327 as the filling member 17, the vibration of the second flat plate portion 320 is effectively absorbed by the elastic member arranged in the groove. Can be suppressed.

(Modification example)
FIG. 10 is an explanatory view of an actuator according to a modified example of the embodiment of the present invention, and schematically shows the configuration of the first flat plate portion 310. In the above embodiment, the first ridge portion 316 divides the first flat plate portion 310 into two equal parts in the direction in which the long side portion extends, but as shown in FIG. 10, the first ridge portion 316 is divided into two equal parts. A mode in which the first ridge portion 316 divides the first flat plate portion 310 into four may be extended so as to extend in the second direction X and the third direction Y. In this case as well, if the first viscoelastic member 91 is arranged in each of the four regions divided by the first ridge portion 316, the first viscoelastic member 91 is arranged in a region that does not overlap with the first ridge portion 316. can do.

In addition, as shown in parentheses in FIG. 10, the second ridge portion 326 extends in the second direction X and the third direction Y, and the second ridge portion 326 extends the second flat plate portion 320. It may be divided into four, and in this case as well, if the second viscoelastic member 92 is arranged in each of the four regions divided by the second ridge portion 326, it does not overlap with the second ridge portion 326. The second viscoelastic member 92 can be arranged in the region.

(Other embodiments)
In the above embodiment, the filling members 16 and 17 are provided in both of the grooves 317 and 327, but the filling member is provided in only one of the grooves 317 and 327, and the filling member is provided in any of the grooves 317 and 327. It may not be provided. In the above embodiment, the first ridge 316 and the second ridge 326 project inward, respectively, but one or both of the first ridge 316 and the second ridge 326. May be in a mode in which is protruding outward. In the above embodiment, in both the first ridge portion 316 and the second ridge portion 326, the opposite side is the groove 317 and 327, but the first ridge portion 316 and the second ridge portion 326 are formed. It may be a mode in which the opposite side to one or both is not a groove. In the above embodiment, both the first ridge portion 316 and the second ridge portion 326 are provided, but only the first flat plate portion 310 is provided with the first ridge portion 316 and the second flat plate portion. The 320 may not be provided with the second ridge portion 326.

In the above embodiment, permanent magnets (first permanent magnet 71 and second permanent magnet 72) are provided on both sides of the first direction Z with respect to the coil 5, but permanent magnets are provided only on one of the first directions Z with respect to the coil 5. The present invention may be applied to the provided actuator. In the above embodiment, the coil 5 is provided on the support 2, and the permanent magnets (first permanent magnet 71 and second permanent magnet 72) and yokes (first yoke 81 and second yoke 82) are provided on the movable body 6. .. However, the present invention is applied to an actuator in which the coil 5 is provided on the movable body 6 and the permanent magnets (first permanent magnet 71 and second permanent magnet 72) and yokes (first yoke 81 and second yoke 82) are provided on the support 2. May be applied.

In the above embodiment, a gel-like member (viscoelastic member) is used as the connecting member 9, but rubber, a spring, or the like may be used. Here, viscoelasticity is a property that combines both viscosity and elasticity, and is a property that is prominently found in polymer substances such as gel-like members, plastics, and rubber. Therefore, as the connecting member 9 having viscoelasticity, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber), chloroprene rubber, acrylonitrile / butadiene rubber, etc.), non-diene rubber (for example, Various rubber materials such as butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluororubber, etc.), thermoplastic elastomers, and modified materials thereof may be used.

1 ... Actuator, 1a ... Magnetic drive circuit, 2 ... Support, 3 ... Cover, 4 ... Coil holder, 5 ... Coil, 6 ... Movable body, 9 ... Connecting member, 16, 17 ... Filling member, 31 ... First cover Member, 32 ... 2nd cover member, 47 ... 1st plate, 48 ... 2nd plate, 71 ... 1st permanent magnet, 72 ... 2nd permanent magnet, 81 ... 1st yoke, 82 ... 2nd yoke, 91 ... 1st 1 viscoelastic member, 92 ... second viscoelastic member, 310 ... first flat plate portion, 316 ... first ridge portion, 317, 327 ... groove, 320 ... second flat plate portion, 326 ... second ridge portion, X ... 2nd direction, Y ... 3rd direction, Z ... 1st direction

Claims (14)

A first cover member having a first flat plate portion, and a support having a second cover member having a second flat plate portion facing the first flat plate portion in the first direction.
A movable body arranged between the first flat plate portion and the second flat plate portion,
A connecting member having at least one of elasticity and viscoelasticity and connected to both the movable body and the support.
A magnetic drive circuit that vibrates the movable body in a second direction intersecting the first direction with respect to the support.
Have,
An actuator characterized in that the first flat plate portion is provided with a first ridge portion extending so as to partition the first flat plate portion into a plurality of regions. In the actuator according to claim 1,
The actuator characterized in that the first ridge portion protrudes toward the side where the second flat plate portion is located. In the actuator according to claim 2,
The actuator is characterized in that the connecting member includes a first viscoelastic member arranged between a region partitioned by the first ridge portion and the movable body in the first flat plate portion. In the actuator according to any one of claims 1 to 3,
The actuator characterized in that the first ridge portion reaches the end portion of the first flat plate portion. In the actuator according to any one of claims 1 to 4.
The first flat plate portion is a rectangle having a pair of long side portions facing each other and a pair of short side portions facing each other between the pair of long side portions.
The actuator is characterized in that the first ridge portion extends in a direction along the pair of short side portions at least at a central portion in a direction in which the pair of long side portions extends. In the actuator according to any one of claims 1 to 5.
The first flat plate portion is an actuator characterized in that the opposite side of the first ridge portion is a groove. In the actuator according to claim 6,
An actuator characterized in that a filling member is provided inside the groove. In the actuator according to claim 7.
The filling member is an actuator characterized by being a rigid member. In the actuator according to claim 7.
The filling member is an actuator characterized by being an elastic member. In the actuator according to any one of claims 1 to 9.
The first flat plate portion is an actuator made of an iron-based metal. In the actuator according to any one of claims 1 to 10.
An actuator characterized in that the second flat plate portion is provided with a second ridge portion extending so as to partition the second flat plate portion into a plurality of regions. In the actuator according to claim 11,
The actuator characterized in that the second ridge portion protrudes toward the side where the first flat plate portion is located. In the actuator according to claim 11 or 12.
The actuator is characterized in that the connecting member includes a second viscoelastic member of the second flat plate portion arranged between a region partitioned by the second ridge portion and the movable body. A first cover member having a first flat plate portion, and a support having a second cover member having a second flat plate portion facing the first flat plate portion in the first direction.
A movable body arranged between the first flat plate portion and the second flat plate portion,
A connecting member having at least one of elasticity and viscoelasticity and connected to both the movable body and the support.
A magnetic drive circuit that vibrates the movable body with respect to the support in a second direction intersecting the first direction according to information to be output.
Have,
A tactile device characterized in that the first flat plate portion is provided with a first ridge portion extending so as to partition the first flat plate portion into a plurality of regions.

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