Actuator
阅读说明:本技术 致动器 (Actuator ) 是由 土桥将生 北原裕士 于 2020-03-25 设计创作,主要内容包括:一种致动器,容易确保可动体的移动距离。该致动器(1)具备支承体(2)、可动体(6)及使可动体(6)沿第二方向(X)振动的磁驱动回路(1a)。磁驱动回路(1a)具备设置于支承体(2)上的线圈(5)和在第一方向(Z)上与线圈(5)对置的磁体(7)。可动体(6)具备磁体(7)和保持磁体(7)的磁轭(8)。磁轭(8)由磁性材料构成,具备隔着线圈(5)及磁体(7)在第一方向(Z)上对置的第一板部(811)及第二板部(821)和隔着线圈(5)及磁体(7)在第三方向(Y)上对置的一对连接部(88)。因为一对连接部(88)没有设置在可动体(6)的第二方向(X)的两端,所以能够确保可动体(6)的移动距离。(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 (1a) that vibrates the movable body (6) in a second direction (X). The magnetic drive circuit (1a) is provided with a coil (5) provided on a support body (2), and a magnet (7) that faces the coil (5) in a 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 secured.)
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.
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.
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.
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 surely 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 becomes easier 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 feeding 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 is a cross-sectional view a-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 … actuator; 1a … magnetic drive loop; 2 … a support; 3 … a housing; 4 … coil support; 5 … coil; 6 … movable body; 7 … a magnet; 8 … a magnetic yoke; 9 … an adhesive layer; 10 … power supply substrate; 31 … first housing part; 32 … second housing part; 41 … board parts; 42. 43 … notch portion; 47 … first panel; 48 … a second panel; 50 … hollow core; 51 … long side part; 52 … short side portions; 61 … bracket through hole; 62 … first plate side through hole; 63 … second plate side through hole; 71 … a first permanent magnet; 72 … second permanent magnet; 81 … first yoke; 82 … second yoke; 88 … connection; 88a … first connection portion; 88b … second connection portion; 91. 92 … connector; 311. 321, 413, 414, 415, 417, 418, 419 … side plate parts; 410 … coil placement holes; 411c … guide groove; 811 … a first plate portion; 812 … an extension; 821 … second plate portion; 822 … an extension; a second direction (moving direction) of X …; y … third direction; z … 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 is a sectional view of the actuator 1 (sectional view a-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 body 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
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
The actuator 1 vibrates in the second direction X by the
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)
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 is opposed to the coil 5 at one side Z1 in the first direction Z, and the second permanent magnet 72 is opposed to the coil 5 at 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
As shown in fig. 4, the first yoke 81 includes a pair of protruding
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
(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
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 in the second direction X of the coil holder 4,
As shown in fig. 1, the case 3 is assembled such that the
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
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
The coil holder 4 includes a
The first plate 47 has claw portions 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 toward 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
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
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 and 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 connection bodies 91 and 92 have a stretching characteristic 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 have a stretching characteristic in which a linear component (spring constant) is larger than a nonlinear component (spring constant) when they are stretched and extended 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 a deformation characteristic 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
Further, in a state where the
In a state where the
Here, in the present embodiment, when
(Power supply substrate)
The actuator 1 supplies power to the coil 5 from the outside (higher-level device) via the
The coil holder 4 has a pair of
(Effect)
In the present embodiment, the first plate portion 811 and the
First plate portion 811 and
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
(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
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
Further, the pair of connecting portions 88 may be formed separately from the first plate portion 811 and the
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
Here, the
The pair of extending
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