CN111756210B - Actuator - Google Patents
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- CN111756210B CN111756210B CN202010216623.8A CN202010216623A CN111756210B CN 111756210 B CN111756210 B CN 111756210B CN 202010216623 A CN202010216623 A CN 202010216623A CN 111756210 B CN111756210 B CN 111756210B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
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- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
An actuator easily ensures the moving distance of a movable body. The actuator (1) is provided with a support body (2), a movable body (6), and a magnetic drive circuit (1 a) that vibrates the movable body (6) in a second direction (X). The magnetic drive circuit (1 a) is provided with a coil (5) provided on the support body (2), and a magnet (7) that faces the coil (5) in the first direction (Z). The movable body (6) is provided with a magnet (7) and a yoke (8) that holds the magnet (7). The yoke (8) is made of a magnetic material, and is provided with a first plate section (811) and a second plate section (821) that face each other in the first direction (Z) with a coil (5) and a magnet (7) therebetween, and a pair of connecting sections (88) that face each other in the third direction (Y) with a coil (5) and a magnet (7) therebetween. Since the pair of connecting portions (88) are not provided at both ends of the movable body (6) in the second direction (X), the moving distance of the movable body (6) can be ensured.
Description
Technical Field
The present invention relates to an actuator for vibrating a movable body.
Background
Patent document 1 discloses an actuator used as a device for notifying information by vibration. The actuator of patent document 1 includes a movable body having a permanent magnet and a support body having a coil. The movable body includes a first yoke and a second yoke facing each other in a direction orthogonal to the vibration direction, and the permanent magnet and the coil are arranged between the first yoke and the second yoke. The permanent magnet includes a first magnet fixed to the first yoke and a second magnet fixed to the second yoke. The first magnet and the second magnet face the coil in a direction orthogonal to the vibration direction.
In the actuator of patent document 1, the first yoke includes a first plate portion that holds the first magnet and a pair of connecting portions that extend from both ends of the first plate portion in the vibration direction and are bent toward the second yoke, respectively. Both ends of the second yoke in the vibration direction are fixed to the front ends of the pair of connecting portions. Each connecting portion has a wall shape perpendicular to the vibration direction.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2019-13095
Disclosure of Invention
Technical problem to be solved by the invention
When the movable body includes wall-shaped portions (a pair of connecting portions) at both ends perpendicular to the vibration direction, there is a problem that the moving distance of the movable body is restricted and the thicknesses of the two wall-shaped portions are reduced.
In view of the above problems, an object of the present invention is to provide an actuator that easily ensures a moving distance of a movable body.
Technical scheme for solving technical problem
In order to solve the above-described problems, the present invention provides an actuator including: a support; a movable body; a connecting body connected to the movable body and the support body; and a magnetic drive circuit that moves the movable body, the magnetic drive circuit including: a coil provided on one of the support body and the movable body; and a magnet provided on the other of the support body and the movable body and facing the coil, wherein the connecting body has at least one of elasticity and viscoelasticity, and when a facing direction in which the coil and the magnet face each other is a first direction, a moving direction of the movable body is a second direction, and a direction orthogonal to the first direction and the second direction is a third direction, the movable body has a first plate portion and a second plate portion facing each other in the first direction with the coil and the magnet interposed therebetween, and a pair of connecting portions facing each other in the third direction with the coil and the magnet interposed therebetween and connecting the first plate portion and the second plate portion.
According to the present invention, the first plate portion and the second plate portion are connected by the connecting portion provided in the third direction orthogonal to the moving direction of the movable body. Thus, the movable body does not need to have wall-shaped portions at both ends perpendicular to the moving direction, and therefore, the moving distance of the movable body can be ensured to be extended by a corresponding amount.
In the present invention, the following manner may be adopted: the first plate portion and the second plate portion are made of a magnetic material. If the first plate portion and the second plate portion facing each other in the first direction with the coil and the magnet interposed therebetween are made of a magnetic material, the first plate portion and the second plate portion function as a yoke. This can suppress the generation of leakage magnetic flux, and thus it is easy to ensure the driving force of the magnetic drive circuit.
In the present invention, it is preferable that each of the pair of connection portions includes a first connection portion integrally formed with the first plate portion and a second connection portion integrally formed with the second plate portion, and the first connection portion and the second connection portion are symmetrical with respect to a plane perpendicular to the first direction. In addition, the member (the member configured by the first plate portion and the first connecting portion) surrounding the magnet and the coil from one side in the first direction and the member (the member configured by the second plate portion and the second connecting portion) surrounding the magnet and the coil from the other side in the first direction can be formed in the same shape. Therefore, the parts can be shared, and the number of parts can be reduced.
In the present invention, the following manner may be adopted: the pair of connecting portions is formed integrally with the first plate portion or the second plate portion. If the connecting portion is formed integrally with the first plate portion or the second plate portion, the number of parts can be reduced as compared with the case where the connecting portion is formed separately from the first plate portion and the second plate portion.
In the present invention, the pair of connecting portions may be formed separately from the first plate portion and the second plate portion. If the connecting portion is made of a member different from the first plate portion and the second plate portion, the degree of freedom of the shape of the component of the connecting portion is high.
In the present invention, the following manner may be adopted: the support includes the coil, and the movable body includes the magnet. If the coil is provided on the support, wiring to the coil is facilitated as compared with the case where the coil is provided on the movable body. Further, a load due to deformation of the wiring to the coil when the movable body moves is not generated.
In the present invention, the following manner may be adopted: the support body includes a coil holder that holds the coil, the first plate portion and the second plate portion sandwich the coil holder from both sides in the first direction, the coil holder includes a pair of elongated holes that extend in the second direction at positions that overlap the pair of connecting portions when viewed in the first direction, and each connecting portion penetrates each elongated hole in a state that the connecting portion is movable in the second direction. Accordingly, the contact between the connecting portion and the inner wall surface of the elongated hole can define the movable range of the movable body in the second direction.
In the present invention, the following manner may be adopted: the coil wire is connected to the power feeding board in the second direction via a pair of long holes positioned on one side of the third direction. Accordingly, since the power feeding substrate is disposed in the third direction orthogonal to the moving direction of the movable body, the moving distance of the movable body is not limited by the power feeding substrate. In addition, according to this, it is possible to avoid interference between the coil wire drawn out from the coil and connected to the power supply substrate and the movable body.
In the present invention, the following manner may be adopted: the power supply substrate is disposed on one side of the support body in the second direction.
(effect of the invention)
In the present invention, the first plate portion and the second plate portion of the movable body are connected by a connecting portion provided in a third direction orthogonal to the moving direction. Thus, the movable body does not need to have wall-shaped portions perpendicular to both ends in the moving direction, and therefore, the moving distance of the movable body can be ensured to be extended by the amount. Further, since the movable body does not need to have wall-like portions at both ends perpendicular to the moving direction, the area of the portion where the air is pressed when the movable body vibrates can be reduced. Therefore, the operating sound caused by the compressed air when the movable body moves can be reduced.
Drawings
Fig. 1 is an external perspective view of an actuator to which the present invention is applied.
Fig. 2 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of the actuator of fig. 1.
Fig. 3 is an exploded perspective view of the actuator.
Fig. 4 is an exploded perspective view of the actuator with the housing removed.
Fig. 5 is an exploded perspective view of the support body as viewed from the other side in the first direction.
Fig. 6 is an exploded perspective view of the support body as viewed from the first direction side.
Fig. 7 is a cross-sectional B-B view of the actuator of fig. 1.
Description of the reference numerals
1 \ 8230and an actuator; 1a 8230and magnetic drive loop; 2 \ 8230and a support body; 3 \ 8230and a shell; 4 \ 8230and coil support; 5 \ 8230and coil; 6 \ 8230a movable body; 7 \ 8230and a magnet; 8 \ 8230and a magnet yoke; 9' \ 8230and an adhesive layer; 10 8230and a power supply substrate; 31 \ 8230, a first housing part; 32 \ 8230a second housing part; 41 8230a plate part; 42. 43 \ 8230and a gap part; 47 \ 8230a first plate; 48 \ 8230and a second plate; 50 8230and a hollow core part; 51 \ 8230and long edge part; 52 \ 8230and short edge part; 61 \ 8230and a through hole of the bracket; 62 \ 8230and a through hole on the side of the first plate; 63 \ 8230and a through hole on the side of the second plate; 71\8230afirst permanent magnet; 72 \ 8230and a second permanent magnet; 81, 8230and a first magnetic yoke; 82, 8230a second magnetic yoke; 88 \ 8230and a connecting part; 88a 8230, a first connecting part; 88b 8230and a second connecting part; 91. 92 \ 8230a connector; 311. 321, 413, 414, 415, 417, 418, 419' \ 8230; 410 \ 8230and a coil configuration hole; 411c 8230; 811 8230a first plate portion; 812, 8230a protruding part; 821 \ 8230a second plate portion; 822 \ 8230and an extension part; x \8230anda second direction (moving direction); y \8230andthe third direction; z \8230anda first direction (opposite direction).
Detailed Description
Embodiments of the actuator of the present invention will be described below with reference to the drawings. Fig. 1 is an external perspective view of an actuator 1 to which the present invention is applied. Fig. 2 isbase:Sub>A sectional view of the actuator 1 (sectional viewbase:Sub>A-base:Sub>A of fig. 1). Fig. 3 is an exploded perspective view of the actuator 1. Fig. 4 is an exploded perspective view of the actuator 1 with the housing 3 removed. Fig. 5 is an exploded perspective view of the support 2 as viewed from the other side Z2 in the first direction Z. Fig. 6 is an exploded perspective view of the support body 2 as viewed from one side Z1 in the first direction Z. Fig. 7 is a sectional perspective view of the actuator (section B-B of fig. 1).
(Overall Structure)
As shown in fig. 1 and 2, the actuator 1 has a rectangular parallelepiped shape. The actuator 1 includes a support 2 and a movable body 6, the support 2 includes a rectangular housing 3 or the like defining an outer shape of the actuator 1, and the movable body 6 is supported in the housing 3 so as to be movable relative to the support 2. The support body 2 includes a case 3, a coil holder 4, a coil 5, and a power feeding substrate 10. The movable body 6 includes a magnet 7 and a yoke 8. The coil 5 faces the magnet 7, and constitutes a magnetic drive circuit 1a for moving the movable body 6. The facing direction in which the coil 5 and the magnet 7 face each other is orthogonal to the moving direction in which the movable body 6 moves. The actuator 1 further includes connecting bodies 91 and 92 disposed between the movable body 6 and the support body 2. Movable body 6 is supported by support body 2 via connecting bodies 91 and 92. The connecting bodies 91, 92 support the movable body 6 so as to be displaceable in the moving direction. The connectors 91, 92 have at least one of elasticity and viscoelasticity.
In the following description, three directions intersecting each other are referred to as a first direction Z, a second direction X, and a third direction Y. In the present embodiment, the first direction Z, the second direction X, and the third direction Y are mutually orthogonal directions. The first direction Z is an opposing direction in which the coil 5 and the magnet 7 oppose each other. The second direction X is a moving direction of the movable body 6. The actuator 1 has the longitudinal direction oriented in the third direction Y. In the following description, Z1 is given to one side of the first direction Z, Z2 is given to the other side of the first direction Z, X1 is given to one side of the second direction X, X2 is given to the other side of the second direction X, Y1 is given to one side of the third direction Y, and Y2 is given to the other side of the third direction Y.
The actuator 1 vibrates in the second direction X by the movable body 6, and notifies a user of information by passing through the body of a person who uses the actuator 1 or an apparatus or the like to which the actuator 1 is attached. Therefore, the actuator 1 can be used as a haptic device that gives a user a tactile sensation by the vibration of the movable body 6 in the second direction X, for example, can be assembled and used for an operation member of a game machine, an operation panel, a steering wheel of an automobile, a seat, or the like. When the actuator 1 is used as a haptic device, for example, the ac waveform applied to the coil 5 is adjusted so that the acceleration at which the movable body 6 moves to one side X1 of the second direction X is different from the acceleration at which the movable body 6 moves to the other side X2 of the second direction, and the user can feel the vibration having directivity in the second direction X.
Here, the magnetic drive circuit 1a to which the actuator 1 of the present invention is applied may be of a type in which the coil 5 is provided on the support body 2 (one side member) side and the magnet is provided on the movable body 6 (the other side member) side, and of a type in which the magnet 7 is provided on the support body 2 (the other side member) side and the coil 5 is provided on the movable body 6 (one side member) side. In the embodiment described below, one member holding the coil 5 is the support 2, and the other member holding the magnet 7 is the movable body 6.
(Movable body)
As shown in fig. 2 and 4, the present embodiment includes a first permanent magnet 71 and a second permanent magnet as the magnet 7. The first permanent magnet 71 faces the coil 5 on one side Z1 in the first direction Z, and the second permanent magnet 72 faces the coil 5 on the other side Z2 in the first direction Z. The first permanent magnet 71 and the second permanent magnet 72 are magnetized so that one side X1 in the second direction X and the other side X2 in the second direction X have different poles.
The yoke 8 is made of a magnetic material. The yoke 8 holds the magnet 7. As shown in fig. 3, the yoke 8 includes two members, i.e., a first yoke 81 and a second yoke 82. The first yoke 81 includes a first plate 811 having a flat plate shape. The second yoke 82 includes a second plate portion 821 facing the first plate portion 811 in the first direction Z. The first plate portion 811 and the second plate portion 821 are substantially rectangular with the third direction Y as the longitudinal direction. The first permanent magnet 71 is fixed to the first plate portion 811. The second permanent magnet 72 is fixed to the second plate portion 821.
As shown in fig. 4, the first yoke 81 includes a pair of protruding portions 812 protruding from the middle portion of the first plate portion 811 in the third direction Y toward one side X1 and the other side X2 in the second direction X. The second yoke 82 includes a pair of protruding portions 822 protruding from an intermediate portion of the second plate portion 821 in the third direction Y to one side X1 and the other side X2 in the second direction X. As shown in fig. 2, the first permanent magnet 71 is held on the other side Z2 surface of the first plate portion 811 in the first direction Z. In addition, the second permanent magnet 72 is held on the surface of the second plate portion 821 on one side Z1 in the first direction Z.
Further, the yoke 8 includes a pair of connecting portions 88, and the pair of connecting portions 88 connect the first plate portion 811 and the second plate portion 821 at two locations separated in the third direction Y. The pair of connecting portions 88 face each other in the third direction Y with the coil 5 and the magnet 7 interposed therebetween. Each of the connecting portions 88 includes a first connecting portion 88a extending from the end portions of the first plate portion 811 on one side Y1 and the other side Y2 in the third direction Y to the other side Z2 in the first direction Z, and a second connecting portion 88b extending from the end portions of the second plate portion 821 on one side Y1 and the other side Y2 in the third direction Y to the one side Z1 in the first direction Z. That is, the first connecting portion 88a is formed integrally with the first plate portion 811. The second connecting portion 88b is integrally formed with the second plate portion 821. An end portion of the other side Z2 of the first connecting portion 88a in the first direction Z is fixed to an end portion of one side Z1 of the second connecting portion 88b in the first direction Z by welding.
(support body)
As shown in fig. 1 to 3, in the support body 2, the housing 3 defining the outer shape of the actuator 1 includes a first housing member 31 and a second housing member 32 overlapping the other side Z2 of the first housing member 31 in the first direction Z. 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. The case 3 is assembled in a state where the pair of side plate portions 321 provided on both sides of the second case member 32 in the second direction X are covered on the pair of side plate portions 311 provided on both sides of the first case member 31 in the second direction X. Both ends of the housing 3 in the third direction Y are openings, and the power supply board 10 is disposed in the opening on one side Y1 in the third direction Y.
As shown in fig. 5, the coil holder 4 is a rectangular shape elongated in the third direction Y as viewed from the first direction Z. As shown in fig. 3, on the side surface of one side X1 of the coil holder 4 in the second direction X, projections 414e and 418e are formed at two positions at both ends in the third direction Y, and engaging projections 414d and 418d are formed at two positions apart in the third direction Y.
As shown in fig. 1, the case 3 is assembled such that the protrusions 414e, 418e of the coil holder 4 are fitted into the notch 311a of the first case member 31 and the notch 321a of the second case member 32, and the engaging protrusions 414d, 418d of the coil holder 4 are engaged into the engaging holes 321d of the second case member 32. Similarly, a protruding portion that fits into the notch 311a of the first case member 31 and the notch 321a of the second case member 32 is formed on the other side surface X2 of the coil holder 4 in the second direction X, and an engagement protrusion that engages with the engagement hole 321d of the second case member 32 is formed.
As shown in fig. 5 and 6, the coil 5 is an air-core coil having a ring-like planar shape wound in an oval shape. The coil 5 is held by the coil support 4. The coil 5 includes two long side portions 51 arranged in parallel in the second direction X and extending in the third direction Y, and two arc-shaped short side portions 52 connecting both ends of the two long side portions 51 in the third direction Y. When movable body 6 and support body 2 are assembled, first permanent magnet 71 faces long side portion 51 of coil 5 on one side Z1 in first direction Z, and second permanent magnet 72 faces long side portion 51 of coil 5 on the other side Z2 in first direction Z.
The coil support 4 is a rectangle that is long in the third direction Y when viewed from the first direction Z. The coil holder 4 includes a plate portion 41 extending in the third direction Y at the center in the second direction X. In the central portion of the plate portion 41 in the third direction Y, a coil arrangement hole 410 is opened in the first direction Z. The coil arrangement hole 410 is an oblong through-hole in which the coil 5 is arranged. Further, the plate portion 41 is provided with a pair of holder through holes 61 on both sides of the coil arrangement hole 410 in the third direction Y. The holder through-hole 61 penetrates the coil holder 4 in the first direction Z. That is, the holder through-hole 61 is open in the first direction Z. The pair of bracket through holes 61 are long holes extending in the second direction X.
The first plate 47 and the second plate 48 are attached to the coil holder 4 so as to overlap the plate portion 41 from one side Z1 and the other side Z2 in the first direction Z. The first plate 47 and the second plate 48 are made of a nonmagnetic material. In the present embodiment, the first plate 47 and the second plate 48 are made of a non-magnetic stainless steel plate. The first plate 47 is provided with a pair of first plate side through holes 62, and when the coil holder 4 is superposed, the pair of first plate side through holes 62 are superposed on the pair of holder through holes 61, respectively. The second plate 48 is provided with a pair of second plate side through holes 63, and the pair of second plate side through holes 63 overlap with the pair of holder through holes 61 when the coil holder 4 is superimposed thereon. The first plate-side through hole 62 and the second plate-side through hole 63 are long holes extending in the second direction X.
The coil holder 4 includes notch portions 42 and 43 that cut the edges of the plate portion 41 on both sides in the second direction X inward. The notches 42 and 43 are provided at the middle portion of the plate 41 in the third direction Y.
The coil holder 4 includes a side plate 413 protruding from an edge of the plate 41 on the side Y1 in the third direction Y toward the side Z1 in the first direction Z on the side Y1 in the third direction Y of the notches 42 and 43. The coil holder 4 includes side plate portions 414 and 415 protruding from an edge of one side X1 of the plate portion 41 in the second direction X and an edge of the other side X2 of the plate portion 41 in the second direction X toward one side Z1 and the other side Z2 of the first direction Z on one side Y1 of the notch portions 42 and 43 in the third direction Y. The coil holder 4 further includes a side plate portion 417 protruding from an edge of the other side Y2 of the plate portion 41 in the third direction Y toward the one side Z1 and the other side Z2 in the first direction Z on the other side Y2 of the notches 42 and 43 in the third direction Y. The coil holder 4 includes side plate portions 418 and 419 that protrude from the edge of one side X1 of the plate portion 41 in the second direction X and the edge of the other side X2 of the plate portion 41 in the second direction X toward the one side Z1 and the other side Z2 of the first direction Z on the other side Y2 of the notch portions 42 and 43 in the third direction Y.
The first plate 47 has a claw 472 projecting obliquely from both sides in the second direction X to one side Z1 in the first direction Z. The second plate 48 has claw portions 482 projecting obliquely from both sides in the second direction X to the other side Z2 in the first direction Z. The claw portions 482 are elastically abutted against the inside of groove-like recesses formed in the inner surfaces 414s, 415s, 418s, 419s of the side plate portions 414, 415, 418, 419, and are held by the coil holder 4.
The coil 5 is fixed to the coil support 4 by an adhesive. The adhesive is filled in the air core portion 50 of the coil 5, flows between the coil 5 and the coil holder 4, and is cured. In addition, the adhesive flows and cures between the coil 5 and the first plate 47, between the first plate 47 and the coil support 4, between the coil 5 and the second plate 48, and between the second plate 48 and the coil support 4. Therefore, the coil 5, the first plate 47, the second plate 48, and the coil holder 4 are fixed by the adhesive layer 9 (see fig. 2) into which the adhesive flows and is cured.
(connector)
The movable body 6 is supported movably in the second direction X by connecting bodies 91 and 92 provided between the movable body 6 and the support body 2. As shown in fig. 2 and 4, the connecting body 91 is provided at a portion where the first yoke 81 and the first plate 47 face each other in the first direction Z. The connecting body 92 is provided at a portion where the second yoke 82 and the second plate 48 face each other in the first direction Z. More specifically, the connection bodies 91 and 92 are disposed on both sides of the coil arrangement hole 410 in the third direction Y. That is, the connection bodies 91 and 92 are disposed between the coil arrangement hole 410 and the holder through-hole 61 located on one side Y1 in the third direction Y, and between the coil arrangement hole 410 and the holder through-hole 61 located on the other side Y2 in the third direction Y. In the present embodiment, both surfaces of the connecting bodies 91 and 92 in the first direction Z are connected to the movable body 6 and the support body 2 by means of bonding or the like. The link bodies 91 and 92 are compressed in the first direction Z between the support 2 and the movable body 6.
In the present embodiment, the connecting bodies 91, 92 are viscoelastic members. For example, the connecting bodies 91 and 92 (viscoelastic members) are gel-like members made of silicone gel or the like. In the present embodiment, the connectors 91 and 92 are made of silicone gel having a penetration of 10 to 110 degrees. The penetration is defined by JIS-K-2207 or JIS-K-2220, and a smaller value means a harder value. In addition, as the linkers 91, 92 having viscoelasticity, various rubber materials such as natural rubber, diene rubber (for example, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, etc.), non-diene rubber (for example, butyl rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, fluororubber, etc.), thermoplastic elastomer, and modified materials thereof can be used.
The connection bodies 91 and 92 have linear or nonlinear expansion and contraction characteristics according to the expansion and contraction direction. For example, the link bodies 91 and 92 have expansion and contraction characteristics in which a nonlinear component is larger than a linear component (spring constant) when they are compressed and deformed in the thickness direction (axial direction), and in which a linear component (spring constant) is larger than a nonlinear component (spring constant) when they are extended by being stretched in the thickness direction (axial direction). When the connected bodies 91 and 92 are deformed in the direction (shearing direction) intersecting the thickness direction (axial direction), they are deformed in the direction in which they are stretched and extended regardless of the direction of movement, and therefore have deformation characteristics in which the linear component (spring constant) is larger than the nonlinear component (spring constant).
Here, as shown in fig. 3, in a state where the movable body 6 is supported by the support 2 via the connecting bodies 91 and 92, the protruding portion 812 and the protruding portion 822 of the yoke 8 are respectively arranged in the notch portions 42 and 43 of the coil holder 4. Thus, the side plate portions 414 and 418 and the side plate portions 415 and 419 of the coil holder 4 function as stoppers that define the movable range when the movable body 6 moves in the third direction Y.
Further, in a state where the movable body 6 is supported by the support 2 via the connecting bodies 91, 92, the first yoke 81 and the inner surfaces 414s, 415s, 418s, 419s face each other in the second direction X on one side Z1 of the plate portion 41 of the coil bracket 4 in the first direction Z. Further, on the other side Z2 of the plate portion 41 in the first direction Z, the second yoke 82 and the inner surfaces 414s, 415s, 418s, 419s are opposed in the second direction X. Therefore, the inner surfaces 414s and 415s of the side plate portions 414 and 415 and the inner surfaces 418s and 419s of the side plate portions 418 and 419 function as stoppers that define the movable range of the movable body 6 when moving in the second direction X.
In a state where the movable body 6 is supported by the support 2 via the connecting bodies 91 and 92, each of the pair of connecting portions 88 of the yoke 8 penetrates the first plate-side through hole 62, the bracket through hole 61, and the second plate-side through hole 63 in the first direction Z while being movable in the second direction X. Therefore, the inner wall surfaces of the first plate side through hole 62, the holder through hole 61, and the second plate side through hole 63 function as a stopper portion that defines the movable range when the movable body 6 moves in the third direction Y.
Here, in the present embodiment, when movable body 6 vibrates in second direction X, connecting bodies 91, 92 deform in the shearing direction. Therefore, in the connected bodies 91 and 92, when the movable body 6 vibrates in the second direction X, the reproducibility of the vibration acceleration with respect to the input signal can be improved by using the spring element in the shearing direction, and thus vibration can be realized with a slight difference.
(Power supply substrate)
The actuator 1 supplies power to the coil 5 from the outside (higher-level device) via the power supply substrate 10. As shown in fig. 1 and 3, the power feeding substrate 10 is held in the opening of the coil holder 4 surrounded by the side plate portions 413, 414, 415 on one side in the third direction Y. The coil wire 56 drawn out from the coil 5 is drawn out to the power supply substrate 10 side through a guide groove 411c (see fig. 5) formed in the plate portion 41 of the coil holder 4 via one side X1 in the second direction X of the holder through hole 61 on one side Y1 in the third direction Y of the coil holder 4, is bent to the other side Z2 in the first direction Z, and is connected to the power supply substrate 10. The coil wire 57 drawn out from the coil 5 is drawn out to the power supply substrate 10 side through the guide groove 411c formed in the plate portion 41 of the coil holder 4 via the other side X2 in the second direction X of the holder through hole 61 on the one side Y1 in the third direction Y of the coil holder 4, is bent to the other side Z2 in the first direction Z, and is connected to the power supply substrate 10.
The coil holder 4 has a pair of slits 414t and 415t formed at the ends of the side plate portions 414 and 415 facing each other in the second direction X, and the ends of the power feeding substrate 10 on both sides in the second direction X are fitted into the slits 414t and 415t, respectively. In the present embodiment, after the end portions of the power feeding substrate 10 are fitted into the slits 414t and 415t, the coil holder 4 and the power feeding substrate 10 are further fixed by an adhesive, thereby forming a structure for suppressing vibration of the power feeding substrate 10.
(Effect)
In the present embodiment, the first plate portion 811 and the second plate portion 821 facing in the first direction Z with the coil 5 and the magnet 7 interposed therebetween are connected by a pair of connecting portions 88 facing in the third direction Y with the coil 5 and the magnet 7 interposed therebetween. According to this configuration, since movable body 6 does not need to have wall-like portions perpendicular to both ends in second direction X, which is the moving direction thereof, it is possible to ensure that the moving distance of movable body 6 is extended by a corresponding amount. In addition, since movable body 6 does not need to have wall-shaped portions at both ends perpendicular to second direction X, the area of the portion that presses air when movable body 6 moves can be reduced. Therefore, the operating sound caused by the compressed air when movable body 6 moves can be reduced.
In the present embodiment, each of the pair of connecting portions 88 includes a first connecting portion 88a formed integrally with the first plate portion 811 and a second connecting portion 88b formed integrally with the second plate portion 821, and the first connecting portion 88a and the second connecting portion 88b are symmetrical with respect to a virtual plane S perpendicular to the first direction Z. Thus, since the member including first plate portion 811 and first connecting portion 88a and the member including second plate portion 821 and second connecting portion 88b have the same shape, the shapes of the components can be shared. This can reduce the manufacturing cost and the management cost of the parts.
(modification example)
Each connecting portion 88 may be provided integrally with the first plate portion 811. That is, the first yoke 81 may have the pair of connection portions 88. In this case, the end portions of the other side Z2 in the first direction Z of the pair of connecting portions 88 are welded to the second yoke 82. Alternatively, each connection portion 88 may be provided integrally with the second plate portion 821. That is, the second yoke 82 may be provided with the pair of connection portions 88. In this case, the end portions of one side Z1 in the first direction Z of the pair of connecting portions 88 are welded to the second yoke 82.
Accordingly, since the pair of connecting portions 88 is formed integrally with the first yoke 81 or the second yoke 82, the number of parts can be reduced and the strength of the movable body 6 can be ensured as compared with the case where the pair of connecting portions 88 are provided separately from the first yoke 81 and the second yoke 82.
Further, the pair of connecting portions 88 may be formed separately from the first plate portion 811 and the second plate portion 821. Accordingly, the degree of freedom of the shape of the component is improved for the pair of connection portions 88.
In the above-described embodiment, gel-like members (viscoelastic members) are used as the connection bodies 91 and 92, but rubber, a spring, or the like may be used.
In addition, in the above-described embodiment, the magnets 7 are arranged on both sides in the first direction Z with respect to the coil 5, but the present invention may also be applied to an actuator in which the magnets 7 are arranged only on one side Z1 or the other side Z2 in the first direction Z with respect to the coil 5. Further, the above embodiment includes two sets of the coil 5 and the magnet 7 facing each other in the first direction Z, but the present invention may be applied to an actuator including 1 set or 3 or more sets of the coil 5 and the magnet 7 facing each other in the first direction Z.
The connecting bodies 91 and 92 may be disposed between the movable body 6 and the housing 3. Even in this case, movable body 6 may be supported by connecting bodies 91 and 92 so as to be displaceable in the first direction (moving direction).
Here, the power feeding substrate 10 may be disposed on one side surface of the support 2 in the second direction X.
The pair of extending portions 812 of the first plate portion 811 and the pair of extending portions 822 of the second yoke 82 may be omitted.
Claims (9)
1. An actuator, comprising:
a support;
a movable body;
a connecting body connected to the movable body and the support body; and
a magnetic drive circuit that moves the movable body,
the magnetic drive circuit includes: a coil provided on one member of the support body and the movable body; and a magnet provided on the other of the support body and the movable body and opposed to the coil,
the connecting body has at least one of elasticity and viscoelasticity,
when an opposing direction in which the coil and the magnet face each other is defined as a first direction, a moving direction of the movable body is defined as a second direction, and a direction orthogonal to the first direction and the second direction is defined as a third direction, the movable body includes: a first plate portion and a second plate portion facing each other in the first direction with the coil and the magnet interposed therebetween; and a pair of connecting portions that face each other in the third direction with the coil and the magnet interposed therebetween and connect the first plate portion and the second plate portion to each other,
the pair of connecting parts respectively extend in the first direction to the opposite directions, and the front end surfaces of the connecting parts are butted with each other,
a coil holder for holding the coil is provided between the first plate portion and the second plate portion,
support through holes are respectively arranged at the two ends of the coil support in the third direction,
the first plate and the second plate are laminated on the coil support from both sides in the first direction, and a first plate-side through hole and a second plate-side through hole are formed in a portion corresponding to the support through hole,
the pair of connecting portions of the first plate portion and the second plate portion respectively pass through the first plate-side through hole, the bracket through hole, and the second plate-side through hole along the first direction, so as to limit a movable range of movement of the pair of connecting portions in a third direction.
2. The actuator of claim 1,
the first plate portion and the second plate portion are made of a magnetic material.
3. Actuator according to claim 1 or 2,
the pair of connecting portions are respectively provided with a first connecting portion formed integrally with the first plate portion and a second connecting portion formed integrally with the second plate portion,
the first connecting portion and the second connecting portion are symmetrical with respect to a plane perpendicular to the first direction.
4. Actuator according to claim 1 or 2,
the pair of connecting portions is formed integrally with the first plate portion or the second plate portion.
5. Actuator according to claim 1 or 2,
the pair of connecting portions is formed separately from the first plate portion and the second plate portion.
6. The actuator according to any one of claims 1 to 5,
the support body is provided with the coil,
the movable body is provided with the magnet.
7. The actuator of claim 6,
the support body is provided with a coil holder for holding the coil,
the first plate portion and the second plate portion sandwich the coil yoke from both sides in the first direction,
the coil support includes a pair of elongated holes extending in the second direction at positions overlapping the pair of connecting portions when viewed from the first direction,
each of the connecting portions penetrates each of the elongated holes in a movable state in the second direction.
8. The actuator of claim 7,
has a power supply substrate, a power supply unit,
the power feeding substrate is disposed on one side of the support body in the third direction,
the coil wire drawn out from the coil is connected to the power supply substrate via the second direction of the long hole located on one side of the third direction out of the pair of long holes.
9. The actuator according to any one of claims 1 to 7,
has a power supply substrate, a power supply unit,
the power feeding substrate is disposed on one side of the support body in the second direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-062559 | 2019-03-28 | ||
| JP2019062559A JP7290445B2 (en) | 2019-03-28 | 2019-03-28 | actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111756210A CN111756210A (en) | 2020-10-09 |
| CN111756210B true CN111756210B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010216623.8A Active CN111756210B (en) | 2019-03-28 | 2020-03-25 | Actuator |
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| Country | Link |
|---|---|
| JP (1) | JP7290445B2 (en) |
| CN (1) | CN111756210B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024033111A (en) | 2022-08-30 | 2024-03-13 | ニデックインスツルメンツ株式会社 | actuator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803388A (en) * | 1985-10-28 | 1989-02-07 | Sony Corporation | Linear motor |
| JP2008160944A (en) * | 2006-12-21 | 2008-07-10 | Matsushita Electric Works Ltd | Electromagnetic actuator |
| JP2011205870A (en) * | 2010-03-26 | 2011-10-13 | Sanyo Electric Co Ltd | Vibrating motor |
| WO2018079251A1 (en) * | 2016-10-31 | 2018-05-03 | 日本電産コパル株式会社 | Linear vibration motor |
| CN207339614U (en) * | 2016-09-14 | 2018-05-08 | 日本电产精密株式会社 | Vibrating motor |
| WO2018180948A1 (en) * | 2017-03-30 | 2018-10-04 | 日本電産サンキョー株式会社 | Actuator |
| JP2019013095A (en) * | 2017-06-30 | 2019-01-24 | 日本電産サンキョー株式会社 | Actuator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004000925A (en) * | 2002-04-04 | 2004-01-08 | Matsushita Electric Ind Co Ltd | Linear vibration actuator apparatus, driving method for linear vibration actuator and electronic component using the same |
| JP7020809B2 (en) * | 2017-06-30 | 2022-02-16 | 日本電産サンキョー株式会社 | Actuator |
-
2019
- 2019-03-28 JP JP2019062559A patent/JP7290445B2/en active Active
-
2020
- 2020-03-25 CN CN202010216623.8A patent/CN111756210B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803388A (en) * | 1985-10-28 | 1989-02-07 | Sony Corporation | Linear motor |
| JP2008160944A (en) * | 2006-12-21 | 2008-07-10 | Matsushita Electric Works Ltd | Electromagnetic actuator |
| JP2011205870A (en) * | 2010-03-26 | 2011-10-13 | Sanyo Electric Co Ltd | Vibrating motor |
| CN207339614U (en) * | 2016-09-14 | 2018-05-08 | 日本电产精密株式会社 | Vibrating motor |
| WO2018079251A1 (en) * | 2016-10-31 | 2018-05-03 | 日本電産コパル株式会社 | Linear vibration motor |
| WO2018180948A1 (en) * | 2017-03-30 | 2018-10-04 | 日本電産サンキョー株式会社 | Actuator |
| JP2019013095A (en) * | 2017-06-30 | 2019-01-24 | 日本電産サンキョー株式会社 | Actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111756210A (en) | 2020-10-09 |
| JP7290445B2 (en) | 2023-06-13 |
| JP2020162393A (en) | 2020-10-01 |
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