JP2022032152A - Actuator - Google Patents

Abstract

To provide an actuator capable of outputting large vibrations in a wide frequency band.SOLUTION: An actuator 1 has a connection body 90 that connects a moving body 6 and a support 2, and a magnetic drive mechanism 1a that vibrates the moving body 6 in a second direction X. The connection body 90 is equipped with one side connection body 91 disposed on one side Y1 in a third direction Y intersecting the second direction X (a vibrating direction of the moving body 6) on the basis of a gravity center P of the moving body 6, and the other side connection body 92 disposed on the other side Y2 in the third direction Y on the basis of the gravity center P. A spring constant when the one side connection body 91 deforms in the second direction X, and a spring constant when the other side connection body 92 deforms in the second direction X are different. Therefore, since the acceleration of the moving body 6 has a peak in two drive frequencies, the actuator 1 can output large vibrations in a wide frequency zone.SELECTED DRAWING: Figure 6

Description

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

Patent Document 1 includes a movable body having one of a magnet and a coil and a fixed body having the other of a magnet and a coil, and causes the movable body to vibrate with respect to the fixed body by passing a driving current through the coil. The actuator to be made to be described is described. This type of actuator uses an elastic body or a viscoelastic body as a connecting body for connecting a fixed body and a movable body. In Patent Document 1, a gel-like member made of silicone gel is used as a connecting body.

Japanese Unexamined Patent Publication No. 2020-15010

In an actuator in which a movable body and a fixed body are connected by a connecting body, the moving body is formed when the resonance frequency determined by the mass of the moving body and the spring constant of the connecting body and the frequency (driving frequency) of the driving current flowing through the coil match. It has the vibration characteristic that the acceleration of is the largest. Therefore, the frequency at which a large vibration can be output is limited to the resonance frequency.

The actuator of Patent Document 1 can realize desired vibration characteristics by appropriately designing the weight and arrangement of the weight adjusting member mounted on the movable body. However, although the resonance frequency can be shifted only by mounting the weight adjusting member, it is not possible to output a large vibration in a wide frequency band.

In view of the above problems, an object of the present invention is to provide an actuator capable of outputting a large vibration in a wide frequency band.

In order to solve the above problems, the actuator of the present invention is provided on a movable body and a support, a connecting body connecting the movable body and the support, and one side member of the movable body and the support. A magnetic drive mechanism including a magnet provided on the other side member of the movable body and the support so as to face the coil in a direction intersecting the vibration direction of the movable body. The connecting body has a one-sided connecting body arranged on one side of the crossing direction intersecting the vibration direction with respect to the center of gravity of the movable body, and the other side of the crossing direction with respect to the center of gravity. The spring constant when the one-side connecting body is deformed in the vibration direction is different from the spring constant when the other-side connecting body is deformed in the vibration direction. It is a feature.

In the present invention, the connecting body connecting the movable body and the support is configured so that the spring constant is asymmetric in the direction intersecting the vibration direction with respect to the center of gravity of the movable body. In such a configuration, an actuator in which the acceleration of the movable body has peaks at two drive frequencies and has two resonance frequencies can be obtained. Therefore, an actuator capable of outputting a large vibration in a wide frequency band can be obtained.

In the present invention, it is preferable that the one-sided connector is made of a first gel, and the other-sided connector is made of a second gel different from the first gel. Thus, by using different gels, the spring constant of the connector can be made asymmetric while keeping the shape and arrangement of the connector symmetrical. For example, when a gel is used as a connecting body, the hardness of the gel can be adjusted by adjusting the mixing ratio of the raw materials when producing the gel, and the spring constant of the connecting body can be changed. Therefore, the spring constant of the connecting body can be made asymmetrical only by adjusting the mixing ratio of the raw materials without changing the manufacturing equipment and manufacturing process of the parts.

In the present invention, it is preferable that the one-side connecting body and the other-side connecting body have different arrangement areas when viewed from the crossing direction. In this way, the spring constant of the connector can be made asymmetrical without changing the gel used.

In the present invention, the one-sided connecting body and the other-sided connecting body are each composed of one or a plurality of gel-like members having the same shape, and the number of the gel-like members constituting the one-sided connecting body and the said. It is preferable that the number of the gel-like members constituting the other side connecting body is different. By doing so, all the parts (gel-like members) constituting the connecting body can be made the same, so that the parts management is easy.

In the present invention, when the three directions orthogonal to each other are the first direction, the second direction, and the third direction, the direction in which the coil and the magnet face each other is the first direction, and the vibration direction is the second direction. It is a direction, and the crossing direction is the first direction or the third direction. In this way, by making the spring constant of the connecting body asymmetric in the direction orthogonal to the vibration direction of the movable body, it is possible to output a large vibration in a wide frequency band.

In the present invention, the connecting body connecting the movable body and the support is configured so that the spring constant is asymmetric in the direction intersecting the vibration direction with respect to the center of gravity of the movable body. In such a configuration, an actuator in which the acceleration of the movable body has peaks at two drive frequencies and has two resonance frequencies can be obtained. Therefore, an actuator capable of outputting a large vibration in a wide frequency band can be obtained.

It is a perspective view of the actuator to which this invention is applied. It is a YZ sectional view of the actuator shown in FIG. It is an exploded perspective view of the actuator shown in FIG. It is a perspective view of the actuator which removed the case. It is a perspective view of the support with the case removed. It is explanatory drawing which shows the arrangement of the connection body. It is a graph which shows the acceleration frequency characteristic of an actuator. It is explanatory drawing which shows the arrangement of the connection body of the modification 1. FIG. It is a graph which shows the acceleration frequency characteristic of the actuator provided with the connection body of the modification 1. FIG. It is explanatory drawing which shows the arrangement of the connection body of the modification 2.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, X is attached to the second direction which is the vibration direction of the movable body 6, Z is attached to the first direction which intersects the second direction X, and X is attached to the first direction Z and the second direction X. A Y will be added to the intersecting third direction for explanation. The first direction Z, the second direction X, and the third direction Y are directions orthogonal to each other. 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. In the following description, the case where the one-side member holding the coil 5 is the support 2 and the other-side member holding the magnet 7 is 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. FIG. 2 is a YZ cross-sectional view of the actuator 1 shown in FIG. 1, which is a cross-sectional view taken along the line AA of FIG. FIG. 3 is an exploded perspective view of the actuator 1 shown in FIG. FIG. 4 is a perspective view of the actuator with the case 3 removed. FIG. 5 is a perspective view of the support 2 with the case 3 removed. FIG. 6 is an exploded perspective view of the coil holder 4, the first plate 47, and the coil 5.

As shown in FIG. 1, the actuator 1 has a rectangular parallelepiped shape with the longitudinal direction directed to the third direction Y, and notifies the user holding the actuator 1 of information by vibration in the second direction X. 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.

The actuator 1 includes a support 2 including a square case 3 or the like that defines the outer shape of the actuator 1, and a movable body 6 that is movably supported in the second direction X with respect to the support 2 inside the case 3. .. Further, the actuator 1 includes a magnetic drive mechanism 1a (see FIG. 2) that vibrates the movable body 6 in the second direction X, and a connecting body 90 that connects the movable body 6 and the support body 2.

The support 2 has a case 3, a coil holder 4, a coil 5, and a feeding board 10, and the movable body 6 includes a magnet 7 (first magnet 71 and a second magnet 72) and a yoke 8 (first yoke). It has 81 and a second yoke 82). The coil 5 and the magnet 7 (the first magnet 71 and the second magnet 72) constitute the magnetic drive mechanism 1a. The movable body 6 is supported by the support body 2 via a connecting body 90 arranged between the movable body 6 and the support body 2. The connecting body 90 has at least one of elasticity and viscoelasticity.

(Movable body)
As shown in FIGS. 2, 3, and 4, 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 on the coil 5. It has a flat plate-shaped first 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 and the coil 5 on the other side Z2 of the first direction Z. It has a flat plate-shaped second magnet 72 held on the surface of one side Z1 of the first direction Z of the second yoke 82. The first magnet 71 and the second magnet 72 are each magnetized to poles on which one side X1 in the first direction and the other side X2 in the first direction are different.

As shown in FIG. 3, the first yoke 81 is bent from the flat plate portion 811 to which the first magnet 71 is fixed and both end portions of the flat plate portion 811 in the second direction X to the other side Z2 in the first direction Z. It has a pair of connecting portions 812. The second yoke 82 has a flat plate portion 821 to which the second magnet 72 is fixed, and the intermediate portion of the flat plate portion 821 in the third direction Y is located on one side X1 and the other side X2 of the second direction X. It has a pair of overhanging portions 822. As shown in FIG. 4, a pair of connecting portions 812 of the first yoke 81 are connected to the pair of overhanging portions 822 by a method such as welding.

(Support)
As shown in FIGS. 1, 2 and 3, in the support 2, the case 3 has a first case member 31 located on one side Z1 of the first direction Z and a second case Z2 on the other side Z2 of the first direction Z. It has a second case member 32 that overlaps with one case member 31. The pair of side plate portions 311 provided on both sides of the second direction X of the first case member 31 is covered with the pair of side plate portions 321 provided on both sides of the second direction X of the second case member 32 to cover the case 3. Configure. At that time, the coil holder 4, the coil 5, and the movable body 6 are accommodated between the first case member 31 and the second case member 32. In the present embodiment, the case 3 has openings at both ends in the third direction Y.

As shown in FIG. 3, the coil 5 is an air core coil wound in an oval shape and includes an air core portion 50 extending in the third direction Y. The coil 5 has two long side portions 51 extending in parallel in the second direction X in the third direction Y and two arcuate short sides connecting both ends of the two long side portions 51 in the third direction Y. It is provided with a unit 52. With respect to the coil 5 configured in this way, the first magnet 71 faces the long side portion 51 on one side Z1 of the first direction Z, and the second magnet 72 faces the other side Z2 of the first direction Z. do.

As shown in FIGS. 2 and 3, the coil 5 is held by the coil holder 4. The coil holder 4 has a plate portion 41 in which a coil arrangement hole 410 formed of an oval through hole in which the coil 5 is arranged is opened in the first direction Z. At the end 411 of one side Y1 of the third direction Y of the plate portion 41, the side plate portion 413 protrudes from the edge of one side Y1 of the third direction Y toward one side Z1 of the first direction Z, and the second side plate portion 413 is projected. Side plate portions 414 and 415 project from the edge of one side X1 of the direction X and the edge of the other side X2 of the second direction X toward one side Z1 of the first direction Z and the other side Z2. On the inner surface of the side plate portions 414 and 415, holding portions 414s and 415s formed of groove-shaped recesses extending in the first direction Z are formed. The holding portions 414s and 415s are formed on one side Z1 and the other side Z2 of the first direction Z, respectively, with respect to the plate portion 41.

At the end 412 of the other side Y2 of the third direction Y of the plate portion 41, the edge of the other side Y2 of the third direction Y, the edge of one side X1 of the second direction X, and the other side X2 of the second direction X. Side plate portions 417, 418, and 419 project from the edge toward one side Z1 of the first direction Z and the other side Z2. On the inner surface of the side plate portions 418 and 419, holding portions 418s and 419s formed of groove-shaped recesses extending in the first direction Z are formed. The holding portions 418s and 419s are formed on one side Z1 and the other side Z2 of the first direction Z, respectively, with respect to the plate portion 41.

(1st plate and 2nd plate)
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. As shown in FIG. 2, the coil 5 is fixed to the first plate 47 and the plate portion 41 by the adhesive layer 9 in which the adhesive filled in the air core portion 50 of the coil 5 is cured. Therefore, the coil 5 faces the first magnet 71 via the first plate 47 in the first direction Z.

Further, 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. As shown in FIG. 2, the coil 5 is fixed to the second plate 48 by the adhesive layer 9 in which the adhesive filled in the air core portion 50 of the coil 5 is cured. Therefore, the coil 5 faces the second magnet 72 via the second plate 48 in the first direction Z.

The first plate 47 and the second plate 48 are made of a non-magnetic material. In this embodiment, the first plate 47 and the second plate 48 are made of a metal plate. More specifically, the first plate 47 and the second plate 48 are made of a non-magnetic stainless steel plate. Therefore, the magnetic flux from the first magnet 71 and the magnetic flux of the second magnet 72 are linked to the coil 5 without being affected by the first plate 47 and the second plate 48. Further, the heat generated in the coil 5 can be efficiently dissipated through the first plate 47 and the second plate 48.

As shown in FIG. 3, the first plate 47 has a claw-shaped convex portion 472 that projects diagonally from both sides of the second direction X to one side Z1 of the first direction Z, and the convex portion 472 has a convex portion 472. It elastically contacts the inside of the holding portions 414s, 415s, 418s, and 419s, which are made of groove-shaped recesses formed in the side plate portions 414, 415, 418, and 419 of the coil holder 4, and are held by the coil holder 4. Similarly, the second plate 48 has a claw-shaped convex portion 482 that projects diagonally from both sides of the second direction X to the other side Z2 of the first direction Z, and the convex portion 482 is the coil holder 4. It elastically contacts the inside of the holding portions 414s, 415s, 418s, and 419s, and is held by the coil holder 4.

(Power supply board)
As shown in FIGS. 1, 4, and 5, in the actuator 1, the feeding board 10 is held in the coil holder 4, and the coil wires 56 and 57 drawn out from the coil 5 are soldered to the feeding board 10 by soldering 19. It is connected. In this embodiment, the feeding board 10 is a rigid board.

As shown in FIG. 3, a substrate holding portion 45 is provided at the end of one side Y1 of the third direction Y of the coil holder 4. The substrate holding portion 45 has slits 414t and 415t facing the second direction X with the opening 44 surrounded by the side plate portions 414 and 415 and the end portion 411 of one side Y1 of the third direction Y of the plate portion 41 interposed therebetween. Be prepared. As shown in FIG. 4, the power feeding board 10 has both end portions in the second direction X fitted inside the slits 414t and 415t, respectively. In this embodiment, after the end portion of the feeding board 10 is fitted into the slits 414t and 415t, the coil holder 4 and the feeding board 10 are further fixed with an adhesive to suppress the vibration of the feeding board 10.

The power feeding board 10 is one of a first plate portion 11 formed at a position where the two lands 11a and 11b are separated from each other in the second direction X and one of the first direction Z from both ends of the second direction X of the first plate portion 11. It is provided with two second plate portions 12, 13 protruding from the side Z1. The coil wires 56 and 57 are connected to the lands 11a and 11b by the solder 19.

(Connector)
As shown in FIGS. 2, 3 and 4, the movable body 6 is movably supported in the second direction X and the third direction Y by the connecting body 90 provided between the movable body 6 and the support body 2. Will be done. In the present embodiment, the connecting body 90 is arranged at a portion where the first yoke 81 and the first case member 31 face each other in the first direction Z, and the second yoke 82 and the second case member 32 are in the first direction. It is arranged in a portion facing each other with Z. The connecting body 90 is arranged at two positions separated from each other in the third direction Y between the first yoke 81 and the first case member 31, and the connecting body 90 is arranged between the second yoke 82 and the second case member 32. It is arranged at two places separated in the third direction Y.

FIG. 6 is an explanatory diagram showing the arrangement of the connection body 90. FIG. 6A is a plan view of the actuator 1 from which the second case member 32 has been removed as viewed from the other side Z2 of the first direction Z, and is arranged between the second yoke 82 and the second case member 32. The connection body 90 is shown. Further, FIG. 6B is a bottom view of the actuator 1 from which the first case member 31 has been removed as viewed from one side Z1 of the first direction Z, and is between the first yoke 81 and the first case member 31. The arranged connection body 90 is shown. FIG. 6 (c) is a side view of the movable body 6 and the connecting body 90 as viewed from one side X1 of the second direction X, and FIG. 6 (d) shows the movable body 6 and the connecting body 90 in the third direction Y. It is a front view seen from one side Y1.

The connecting body 90 is a viscoelastic member. More specifically, the connecting body 90 (viscoelastic member) is a gel-like member made of a silicone gel. In the present embodiment, the connecting body 90 is made of a silicone gel having a needle insertion degree of 90 degrees to 110 degrees. Fixing the connecting body 90 to the first yoke 81 and the second yoke 82, and fixing the connecting body 90 to the first case member 31 and the second case member 32 is the adhesiveness of an adhesive, an adhesive, or a silicone gel. It is done using.

A rubber, a spring, or the like may be used as the connecting body 90. 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 connection body 90 having viscous elasticity, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber), chloroprene rubber, acrylonitrile / butadiene rubber, etc.), non-diene rubber (for example, for example). Various rubber materials such as butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluororubber, etc., and various rubber materials thereof and modified materials thereof may be used.

The connecting body 90 has a one-sided connecting body 91 arranged on one side Y1 of the third direction Y with respect to the center of gravity P of the movable body 6, and the other side Y2 of the third direction Y with respect to the center of gravity P of the movable body 6. The other side connecting body 92 arranged in is provided. In the present embodiment, the one-side connecting body 91 is between the one-side connecting body 91A arranged between the first yoke 81 and the first case member 31 and between the second yoke 82 and the second case member 32. It includes a one-sided connector 91B to be arranged. The one-side connecting bodies 91A and 91B are arranged at the same position when viewed from the first direction Z. Further, the other side connecting body 92 is arranged between the other side connecting body 92A arranged between the first yoke 81 and the first case member 31 and between the second yoke 82 and the second case member 32. The other side connecting body 92B is provided. The other side connecting bodies 92A and 92B are arranged at the same position when viewed from the first direction Z.

The actuator 1 is configured such that when the movable body 6 vibrates in the second direction X, the spring constant of the connecting body 90 is asymmetrical on one side and the other side in the crossing direction intersecting the vibration direction. In this embodiment, the one-side connecting body 91 (91A, 91B) arranged on one side Y1 of the third direction Y (crossing direction) intersecting the second direction X (vibration direction) with respect to the center of gravity P of the movable body 6. The other side connecting body 92 (92A, 92B) arranged on the other side Y2 in the third direction Y (intersection direction) with respect to the center of gravity P is provided, and the one side connecting body 91 and the other side connecting body 92 are provided. , The spring constant at the time of shear deformation in the second direction (vibration direction) is different. Here, the spring constant of the one-side connecting body 91 is a synthetic spring constant when the one-side connecting bodies 91A and 91B are arranged in parallel, and the spring constant of the other-side connecting body 92 is the spring constant of the other-side connecting bodies 92A and 92B. It is a synthetic spring constant when is arranged in parallel. Therefore, the synthetic spring constant when the one-side connecting bodies 91A and 91B are arranged in parallel and the synthetic spring constant when the other-side connecting bodies 92A and 92B are arranged in parallel are different.

In this embodiment, the one-side connecting bodies 91A and 91B and the other-side connecting bodies 92A and 92B are both rectangular parallelepiped and have the same shape. The one-side connecting bodies 91A and 91B and the other-side connecting bodies 92A and 92B are arranged symmetrically in the third direction Y with respect to the center of gravity P of the movable body 6.

Here, the one-side connecting body 91 (91A, 91B) is a gel-like member made of the first gel, and the other-side connecting body 92 (92A, 92B) is a gel-like member made of the second gel. .. The first gel and the second gel are gels having different hardness. That is, one of the first gel and the second gel is a harder gel than the other. The hardness of the gel can be expressed, for example, by the amount of strain per unit stress in the range of elastic deformation of the gel, in other words, Young's modulus (slope of stress-strain curve). A large Young's modulus means that the strain is small and hard.

A gel-like member made of a silicone gel is produced by blending a plurality of raw materials and heat-curing them. The hardness of the gel constituting the gel-like member can be adjusted by the mixing ratio of the raw materials. In this embodiment, the first gel constituting the one-side connecting body 91 and the second gel constituting the other-side connecting body 92 are gels having different mixing ratios of raw materials.

The one-side connecting body 91 and the other-side connecting body 92 are arranged symmetrically in the third direction Y, but are composed of gels having different hardness. Therefore, the spring constant when the one-side connecting body 91 is deformed in the second direction X (vibration direction) and the spring constant when the other-side connecting body 92 is deformed in the second direction X (vibration direction) are different. There is.

(Actuator operation)
When the actuator 1 supplies power to the coil 5 from the outside (upper device) via the power supply board 10, the movable body 6 is seconded by the magnetic drive mechanism 1a provided with the coil 5, the first magnet 71 and the second magnet 72. Reciprocate in direction X. 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, but at that time, it is movable by providing a difference in voltage with respect to a change in voltage between a period in which the polarity of the drive signal is negative and a period in which the polarity of the drive signal is positive. A difference is generated between the acceleration when the 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. As a result, the user can feel the illusion that the actuator 1 moves to one side X1 or the other side X2 of the second direction X.

In the actuator 1, a connecting body 90 made of a viscoelastic member is provided between the movable body 6 and the support body 2. The connecting body 90 is arranged so as to be deformed in the shearing direction when the movable body 6 vibrates in the second direction X, and the change in elastic modulus is small. Therefore, the resonance of the movable body 6 can be effectively suppressed. Further, since the connecting body 90 is in a state of being compressed in the first direction Z between the support body 2 and the movable body 6, it surely follows the movement of the movable body 6. Therefore, the resonance of the movable body 6 can be effectively prevented.

FIG. 7 is a graph showing the vibration characteristic (acceleration frequency characteristic) of the actuator 1, and is a graph showing the relationship between the drive frequency of the actuator 1 (frequency of the energization pattern with respect to the coil 5) and the acceleration of the movable body 6. As shown in FIG. 7, the actuator 1 of the present embodiment has two acceleration peaks and two resonance frequencies. Therefore, the actuator 1 has a larger acceleration in a wider frequency band than when the acceleration peak is one. Therefore, a large vibration can be output in a wide frequency band.

(Main action and effect of this form)
As described above, the actuator 1 of the present embodiment is attached to the movable body 6 and the support 2, the connecting body 90 connecting the movable body 6 and the support 2, and one side member of the movable body 6 and the support 2. A magnet provided on the other side member of the movable body 6 and the support 2 facing the provided coil 5 and the coil 5 in a direction intersecting the second direction X (vibration direction) of the movable body 6. 7 is provided with a magnetic drive mechanism 1a. The connecting body 90 is a one-sided connecting body 91 arranged on one side Y1 of the third direction Y (crossing direction) intersecting the second direction X (vibration direction) with reference to the center of gravity P of the movable body 6. The other side connecting body 92 arranged on the other side Y2 in the third direction Y (intersection direction) with respect to the center of gravity P is provided, and when the one side connecting body 91 is deformed in the second direction X (vibration direction). The spring constant and the spring constant when the other side connecting body 92 is deformed in the second direction X (vibration direction) are different.

In this embodiment, the spring constant of the connecting body 90 connecting the movable body 6 and the supporting body 2 is asymmetrical in the direction intersecting the second direction X (vibration direction) with respect to the center of gravity P of the movable body 6. It is configured. Therefore, in the actuator 1, the acceleration of the movable body 6 has a peak at two drive frequencies and has two resonance frequencies. Therefore, it is possible to output a larger vibration in a wider frequency band than in the case where the acceleration peak is one.

In this embodiment, the one-side connecting body 91 is made of a first gel, and the other-side connecting body 92 is made of a second gel different from the first gel. In this way, by using different gels, the hardness of the gels can be made different, and the spring constant is made asymmetric while keeping the shapes and arrangements of the one-side connecting body 91 and the other-side connecting body 92 symmetrical. be able to. The hardness of the gel can be adjusted and the spring constant can be changed by adjusting the mixing ratio of the raw materials. Therefore, the spring constant of the connecting body 90 can be made asymmetrical only by adjusting the mixing ratio of the raw materials without changing the manufacturing equipment and manufacturing process of the parts.

In this embodiment, the three directions orthogonal to each other are the first direction Z, the second direction X, and the third direction Y, the direction in which the coil 5 and the magnet 7 face each other is the first direction Z, and the vibration of the movable body 6 The direction is the second direction X. By making the spring constant of the connecting body 90 asymmetric in the direction orthogonal to the vibration direction of the movable body 6 in this way, it is possible to output a large vibration in a wide frequency band.

In the above embodiment, the spring constant of the connecting body 90 is made asymmetric in the third direction Y orthogonal to the second direction X among the directions intersecting the second direction X, but the direction in which the spring constant is made asymmetric. May be a direction that intersects the second direction X (vibration direction), and may be a direction different from the third direction Y. For example, even when the spring constant of the connecting body 90 is asymmetrical in the first direction Z orthogonal to the second direction X, the graph of acceleration with respect to the driving frequency of the movable body 6 has two peaks. Therefore, it is possible to output a large vibration in a wide frequency band.

(Modification 1)
In the above embodiment, the spring constant of the connecting body 90 is made asymmetric by using two different types of gels, but the spring constant can be made asymmetric by other configurations. The actuator 1 of the modification 1 includes a connecting body 190 that connects the movable body 6 and the support body 2. The connectors 190 are all made of the same gel. The connecting body 190 has a one-sided connecting body 191 arranged on one side Z1 of the first direction Z with respect to the center of gravity P of the movable body 6 and a Y2 on the other side of the first direction Z with respect to the center of gravity P of the movable body 6. The other side connecting body 192 arranged in is provided. The connecting body 190 is configured such that when the movable body 6 vibrates in the second direction X, the spring constants are asymmetrical on one side and the other side of the first direction Z (the crossing direction intersecting the second direction X). ing.

FIG. 8 is an explanatory diagram showing the arrangement of the connection body 190 of the modification 1. FIG. 8A is a plan view of the actuator 1 of the modified example 1 from which the second case member 32 is removed from the other side Z2 of the first direction Z, and is a plan view of the second yoke 82 and the second case member 32. The other side connecting body 192 arranged between them is shown. Further, FIG. 8B is a bottom view of the actuator 1 of the modified example 1 from which the first case member 31 is removed as viewed from one side Z1 of the first direction Z, and is a bottom view of the first yoke 81 and the first case member 31. The one-sided connector 191 arranged between and is shown. FIG. 8 (c) is a side view of the movable body 6 and the connecting body 190 as viewed from one side X1 of the second direction X, and FIG. 8 (d) shows the movable body 6 and the connecting body 190 in the third direction Y. It is a front view seen from one side Y1.

In the first modification, the one-side connecting body 191 and the other-side connecting body 192 are made of the same gel-like member 193. The gel-like member 193 is a rectangular parallelepiped gel extending linearly in the third direction Y. As shown in FIG. 8, the one-side connecting body 191 and the other-side connecting body 192 have different numbers of gel-like members 193. The one-side connecting body 191 is composed of one gel-like member 193, and the other-side connecting body 192 is composed of two gel-like members 193. Therefore, the one-side connecting body 191 and the other-side connecting body 192 have different arrangement areas as seen from the first direction Z, and have different spring constants when shearing and deforming in the second direction X.

The spring constant of the other side connecting body 192 when the movable body 6 vibrates in the second direction X is a synthetic spring constant when two gel-like members 193 are arranged in parallel. The spring constant of the one-side connecting body 191 is the spring constant of one gel-like member 193. Therefore, when the movable body 6 vibrates in the second direction X, the connecting body 190 has an asymmetric spring constant on one side and the other side of the first direction Z.

FIG. 9 is a graph showing the vibration characteristics (acceleration frequency characteristics) of the actuator 1 of the modification 1, and is a graph showing the relationship between the drive frequency of the actuator 1 (frequency of the energization pattern with respect to the coil 5) and the acceleration of the movable body 6. be. As shown in FIG. 9, the actuator 1 of the modified example 1 has two acceleration peaks and two resonance frequencies as in the above embodiment. Therefore, the acceleration can be increased in a wider frequency band than in the case where the peak of the acceleration is one, and a large vibration can be output in the wide frequency band.

Further, in the first modification, the one-side connecting body 191 and the other-side connecting body 192 are configured by using the same gel-like member 193, only the number of the gel-like members 193 is different. Therefore, all the parts (gel-like member 193) used may be the same, so that parts management is easy. The number of gel-like members 193 may differ between the one-side connecting body 191 and the other-side connecting body 192, and is not limited to the above number. For example, the one-side connecting body 191 may be composed of two gel-like members 193, and the other-side connecting body 192 may be composed of three gel-like members 193.

Further, by using one gel-like member having a different size (arrangement area) as seen from the first direction Z as the one-side connecting body 191 and the other-side connecting body 192, one side and the other side of the first direction Z are used. It is also possible to realize a configuration in which the splash constants of the connection body 190 are different. For example, as the one-side connecting body 191, a gel-like member having an area seen from the first direction Z twice as large as that of the other-side connecting body 192 may be used.

(Modification 2)
The actuator 1 of the modification 2 includes a connecting body 290 that connects the movable body 6 and the support body 2. FIG. 10 is an explanatory diagram showing the arrangement of the connection body 290 of the modification 2. FIG. 10A is a plan view of the actuator 1 of the modified example 1 from which the second case member 32 is removed from the other side Z2 of the first direction Z, and is a plan view of the second yoke 82 and the second case member 32. The other side connecting body 292 arranged between them is shown. Further, FIG. 10B is a bottom view of the actuator 1 of the modified example 1 from which the first case member 31 is removed as viewed from one side Z1 of the first direction Z, and is a bottom view of the first yoke 81 and the first case member 31. The one-sided connector 291 arranged between and is shown. 10 (c) is a side view of the movable body 6 and the connecting body 290 as viewed from one side X1 of the second direction X, and FIG. 10 (d) shows the movable body 6 and the connecting body 290 in the third direction Y. It is a front view seen from one side Y1.

The connectors 290 are all made of the same gel. As shown in FIG. 10, the connecting body 290 has a one-sided connecting body 291 arranged on one side Z1 of the first direction Z with respect to the center of gravity P of the movable body 6 and a position with respect to the center of gravity P of the movable body 6. The other side connecting body 292 arranged on the other side Y2 in the one direction Z is provided. In the second modification, similarly to the first modification, the one-side connecting body 291 and the other-side connecting body 292 have different arrangement areas when viewed from the first direction Z, and the spring constants when deforming in the second direction X are different. .. Therefore, in the actuator 1 of the modification 1, when the movable body 6 vibrates in the second direction X, the spring constants are asymmetrical on one side and the other side of the first direction Z (crossing direction) that intersects the second direction X. It is configured to be.

In the second modification, the one-side connecting body 291 and the other-side connecting body 292 are made of gel-like members having different shapes. The one-side connecting body 291 is composed of one rectangular parallelepiped gel-like member having the third direction Y as the longitudinal direction. On the other hand, the other side connecting body 292 is composed of two rectangular parallelepiped gel-like members having the second direction X as the longitudinal direction. The two gel-like members constituting the other side connecting body 292 are arranged symmetrically with respect to the center of gravity P of the movable body 6 in the third direction Y. The one-side connecting body 291 and the other-side connecting body 292 have different arrangement areas and shapes as seen from the first direction Z, and have different spring constants when shearing and deforming in the second direction X. Therefore, when the movable body 6 vibrates in the second direction X, the connecting body 290 has an asymmetric spring constant on one side and the other side of the first direction Z.

The actuator 1 of the modification 2 has two acceleration peaks as in the above embodiment.
It has two resonance frequencies. Therefore, the acceleration can be increased in a wider frequency band than in the case where the peak of the acceleration is one, and a large vibration can be output in the wide frequency band.

In the actuators 1 of Modifications 1 and 2, the spring constants of the connected bodies are asymmetric on one side and the other side of the first direction Z, but the direction in which the spring constants are asymmetric is the vibration of the movable body 6. It may be a direction that intersects the direction, and may be a direction that intersects the second direction X. For example, the spring constant of the connecting body may be asymmetrical on one side and the other side of the third direction Y.

(Other variants)
The number, arrangement, and number of viscoelastic bodies constituting the connecting body are not limited to the above, and the spring constants are asymmetrical on one side and the other side in the direction intersecting the vibration direction of the movable body 6. It should be.

In the above embodiment, the connecting bodies 90, 190, and 290 connect the case 3 and the movable body 6, but the arrangement of the connecting bodies for connecting the movable body 6 and the support body 2 is the above-mentioned embodiment. It is not limited to the arrangement of.

1 ... actuator, 1a ... magnetic drive mechanism, 2 ... support, 3 ... case, 4 ... coil holder, 5 ... coil, 6 ... movable body, 7 ... magnet, 8 ... yoke, 9 ... adhesive layer, 10 ... power supply Substrate, 11 ... 1st plate, 11a, 11b ... Land, 12 ... 2nd plate, 19 ... Handa, 31 ... 1st case member, 32 ... 2nd case member, 41 ... Plate, 44 ... Opening, 45 ... substrate holding portion, 47 ... first plate, 48 ... second plate, 50 ... air core portion, 51 ... long side portion, 52 ... short side portion, 56 ... coil wire, 71 ... first magnet, 72 ... first 2 magnets, 81 ... 1st yoke, 82 ... 2nd yoke, 90 ... connecting body, 91, 91A, 91B ... one side connecting body, 92, 92A, 92B ... other side connecting body, 190 ... connecting body, 191 ... one side Side connecting body, 192 ... other side connecting body, 193 ... gel-like member, 290 ... connecting body, 291 ... one side connecting body, 292 ... other side connecting body, 311, 321 ... side plate portion, 410 ... first coil arrangement hole, 411, 421 ... End, 413, 414, 415, 417, 418, 419 ... Side plate, 414t, 415t ... Slit, 414s, 415s, 418s, 419s ... Holding, 472, 482 ... Convex, 811 ... Flat plate , 812 ... connecting part, 821 ... flat plate part, 822 ... overhanging part, P ... center of gravity, X ... second direction, Y ... third direction, Z ... first direction

Claims (5)

Movable bodies and supports,
A connecting body connecting the movable body and the support body,
A coil provided on one side member of the movable body and the support, and the other of the movable body and the support facing the coil in a direction intersecting the vibration direction of the movable body. It has a magnetic drive mechanism with a magnet provided on the side member, and has.
The connection body is
A one-sided connecting body arranged on one side of the crossing direction intersecting the vibration direction with respect to the center of gravity of the movable body, and the other-side connecting body arranged on the other side of the crossing direction with respect to the center of gravity. Equipped with
An actuator characterized in that the spring constant when the one-side connecting body is deformed in the vibration direction and the spring constant when the other-side connecting body is deformed in the vibration direction are different. The one-sided connector consists of a first gel.
The actuator according to claim 1, wherein the other side connecting body is made of a second gel different from the first gel. The actuator according to claim 1, wherein the one-side connecting body and the other-side connecting body have different arrangement areas when viewed from the crossing direction. The one-sided connector and the other-sided connector are each composed of one or a plurality of gel-like members having the same shape.
The actuator according to claim 3, wherein the number of the gel-like members constituting the one-side connection body is different from the number of the gel-like members constituting the other-side connection body. When the three directions orthogonal to each other are the first direction, the second direction, and the third direction,
The direction in which the coil and the magnet face each other is the first direction.
The vibration direction is the second direction, and the vibration direction is the second direction.
The actuator according to any one of claims 1 to 4, wherein the crossing direction is the first direction or the third direction.

Images