JP2021053586A - Actuator - Google Patents

Abstract

To provide a configuration in which a dimension of an actuator 1 in a direction in which a coil 6 overlaps with a magnet 5 can be reduced.SOLUTION: In an actuator 1, a protruding part 83 whose dimension in a first direction Z is smaller than that of the movable body 3 protrudes in a direction crossing the first direction Z, in a movable body 3, and a connection body 4 is connected to a portion opposing in the first direction Z to the protruding part 83 and to the protruding part 83, of a support body 2, so that the connection body 4 does not overlap in the first direction Z with a coil 6 and a magnet 5. This can reduce a dimension of the actuator 1 in the first direction Z in which the coil 6 overlaps with the magnet 5, and also can increase a dimension (a thickness) in the first direction Z of the connection body 4, which can increase a movement distance (stroke) of the movable body 3 with respect to the support body 2. The protruding part 83 is provided in a yoke 8 and is formed in a tabular shape in which a plate thickness-direction is set in the first direction Z.SELECTED DRAWING: Figure 4

Description

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

As a device that generates vibration by a magnetic drive mechanism, a support and a movable body are connected via a connecting body such as a viscoelastic member so that the coil provided on the support and the coil face each other in the first direction. A configuration has been proposed in which the movable body is relatively moved in a second direction intersecting the first direction with respect to the support by a magnetic drive circuit provided with a magnet provided on the movable body. Here, the connecting body is arranged at a position where the support and the movable body face each other in the first direction at a position where they overlap with the magnetic drive circuit in the first direction (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2019-013090

However, in the actuator described in Patent Document 1, since the coil, the magnet, and the connecting body are arranged so as to overlap each other in the first direction, the thickness of the actuator (dimension in the first direction) is large. Further, in order to increase the moving distance (stroke) of the movable body with respect to the support and increase the acceleration of the movable body, the thickness of the connecting body (dimension in the first direction) must be increased, so that the thickness of the actuator is increased. (Dimension in the first direction) becomes thicker. Therefore, the configuration described in Patent Document 1 has a problem that the size of the actuator in the direction in which the coil and the magnet overlap cannot be reduced.

In view of the above problems, an object of the present invention is to provide a configuration capable of reducing the size of the actuator in the direction in which the coil and the magnet overlap.

In order to solve the above problems, the actuator of the present invention has a support, a movable body, and a connecting body having at least one of viscous and viscoelasticity, and is connected to the support and the movable body. The movable body has a magnet provided on one side of the support and the movable body, and a coil provided on the other side of the support and the movable body and facing the magnet in the first direction. The movable body includes a magnetic drive circuit that moves relative to the support in a second direction intersecting the first direction, and in the movable body, a protruding portion whose size in the first direction is smaller than that of the movable body is the first. It protrudes in a direction intersecting the direction, and the connecting body is connected to a portion of the support that faces the protruding portion in the first direction and the protruding portion.

In the present invention, in the movable body, a protruding portion having a size smaller than that of the movable body in the first direction protrudes in a direction intersecting the first direction, and the connecting body is the first of the supports to the protruding portion. It is connected to a portion facing each other in one direction and a protruding portion. Therefore, since the connecting body does not overlap the coil and the magnet in the first direction, the size of the actuator in the first direction in which the coil and the magnet overlap can be reduced. Further, since the connecting body does not overlap the coil and the magnet in the first direction, the dimension of the connecting body in the first direction can be increased, so that the moving distance (stroke) of the movable body with respect to the support can be increased. The acceleration of the movable body can be increased. Therefore, the vibration generated by the actuator can be increased.

In the present invention, the projecting portion protrudes from an intermediate position in the first direction of the movable body, and the connecting body is one side of the supporting body in the first direction with respect to the projecting portion. A mode provided between the facing portion and the protruding portion, and between the portion of the support that faces the protruding portion on the other side in the first direction and the protruding portion. Can be adopted.

In the present invention, it is possible to adopt a mode in which the protruding portion protrudes in a third direction intersecting both the first direction and the second direction.

In the present invention, the connecting body can adopt an aspect of being a viscoelastic member.

In the present invention, the protruding portion can adopt a plate-like aspect in which the plate thickness direction is directed in the first direction.

In the present invention, in the movable body, it is possible to adopt an embodiment in which the protruding portion is provided on one side and the other side in the direction intersecting the first direction.

In the present invention, the support has a case for accommodating the movable body, and the case has a first end plate portion facing the movable body on one side in the first direction, and the movable body. An embodiment including a second end plate portion facing the other side in the first direction can be adopted.

In the present invention, the magnet is provided on the movable body, the coil is provided on the support, the movable body is provided with a yoke that overlaps the magnet from the side opposite to the coil, and the protrusion is , The embodiment provided in the yoke can be adopted.

In the present invention, in the movable body, a protruding portion having a size smaller than that of the movable body in the first direction protrudes in a direction intersecting the first direction, and the connecting body is the first of the supports to the protruding portion. It is connected to a portion facing each other in one direction and a protruding portion. Therefore, since the connecting body does not overlap the coil and the magnet in the first direction, the size of the actuator in the first direction in which the coil and the magnet overlap can be reduced. Further, since the connecting body does not overlap the coil and the magnet in the first direction, the dimension of the connecting body in the first direction can be increased, so that the moving distance (stroke) of the movable body with respect to the support can be increased. The acceleration of the movable body can be increased. Therefore, the vibration generated by the actuator can be increased.

The external perspective view of the actuator which concerns on embodiment of this invention. FIG. 3 is an external perspective view of the actuator of FIG. 1 as viewed from the other side in the second direction. An exploded perspective view of the actuator of FIG. FIG. 3 is a cross-sectional view of the actuator of FIG. FIG. 5 is a plan view in a state where the first case member and the first yoke are removed from the actuator of FIG. An exploded perspective view of the actuator with the case removed from the other side in the first direction. An exploded perspective view of the actuator with the case removed from one side in the first direction. It is an exploded perspective view of a coil, a coil holder, and a wiring board.

Hereinafter, embodiments of the exemplary actuator of the present invention will be described with reference to the drawings. In the following description, the three directions intersecting each other will be described as the first direction Z, the second direction Y, and the third direction X, respectively. Further, in the embodiment described below, the first direction Z
, The second direction Y and the third direction X are orthogonal to each other. Further, X1 is attached to one side of the third direction X, X2 is attached to the other side of the third direction X, Y1 is attached to one side of the second direction Y, and Y2 is attached to the other side of the second direction Y. , Z1 is attached to one side of the first direction Z, and Z2 is attached to the other side of the first direction Z.

The actuator 1 to which the present invention is applied has a magnetic drive circuit 10 that moves the movable body 3 relative to the support body 2. The magnetic drive circuit 10 has a magnet 5 and a coil 6 facing the magnet 5 in the first direction Z. In the magnetic drive circuit 10, the coil 6 is provided on the side of the support 2 and the magnet 5 is provided on the side of the movable body 3, and the coil 6 is provided on the side of the movable body 3 and the magnet 5 is provided on the support. The mode provided on the side of 2 can be adopted. In the embodiment described below, the coil 6 is provided on the side of the support 2 and the magnet 5 is provided on the side of the movable body 3.

FIG. 1 is an external perspective view of the actuator 1 according to the embodiment of the present invention. FIG. 2 is an external perspective view of the actuator 1 of FIG. 1 as viewed from the other side Y2 in the second direction Y. FIG. 3 is an exploded perspective view of the actuator 1 of FIG. FIG. 4 is a cross-sectional view of the actuator 1 of FIG. FIG. 5 is a plan view of the actuator 1 of FIG. 1 with the first case member 91 and the first yoke 81 removed. FIG. 6 is an exploded perspective view of the actuator 1 from which the case 9 has been removed as viewed from the other side Z2 in the first direction Z. FIG. 7 is an exploded perspective view of the actuator 1 from which the case 9 has been removed as viewed from one side Z1 of the first direction Z. FIG. 8 is an exploded perspective view of the coil 6, the coil holder 7, and the wiring board 11.

(overall structure)
As shown in FIGS. 1, 2 and 3, the actuator 1 of the present embodiment has a support 2 including a case 9 having a substantially rectangular parallelepiped shape in which the longitudinal direction is directed to the second direction Y. As shown in FIG. 4, a movable body 3 is arranged inside the case 9, and a connecting body 4 is connected to the support 2 and the movable body 3. The case 9 constitutes the outer shell of the actuator 1. Therefore, the actuator 1 has a substantially rectangular parallelepiped shape with the longitudinal direction directed to the second direction Y.

As shown in FIGS. 3 and 4, the support 2 has a case 9, a coil 6, a coil holder 7, and a wiring board 11. The movable body 3 has a magnet 5 and a yoke 8. The magnet 5 and the coil 6 face each other in the first direction Z, and form a magnetic drive circuit 10 that moves the movable body 3 relative to the support 2 in the second direction Y. Therefore, the magnetic drive circuit 10 can vibrate the movable body 3 in the second direction Y. Therefore, the actuator 1 can be used as a vibration device that gives a tactile sensation to a person who uses a device or the like to which the actuator 1 is attached. For example, the actuator 1 can be used by being incorporated into an operation member of a game machine, an operation panel, a steering wheel or a seat of an automobile, or the like.

(Movable body 3)
As shown in FIGS. 4, 5, 6 and 7, in the movable body 3, the magnet 5 has a first magnet 51 facing the coil 6 on one side Z1 of the first direction Z and a first magnet 5 on the coil 6. It has a second magnet 52 that faces Z2 on the other side of the direction Z. In this embodiment, the first magnet 51 and the second magnet 52 are each composed of two magnets arranged in the second direction Y. In the first magnet 51, at least the surface facing the coil 6 is magnetized to a pole on which one side Y1 and the other side Y2 of the second direction Y are different. Similarly, in the second magnet 52, at least the surface facing the coil 6 is magnetized to a pole on which one side Y1 and the other side Y2 of the second direction Y are different. Further, in the first magnet 51 and the second magnet 52, the surfaces facing each other via the coil 6 are configured to be different poles.

In the movable body 3, a yoke 8 is provided on the side opposite to the coil 6 with respect to the first magnet 51 and the second magnet 52, and the first magnet 51 and the second magnet 52 are held by the yoke 8. The yoke 8 is formed by pressing a magnetic plate. In the present embodiment, the yoke 8 includes the first yoke 81 arranged on the side opposite to the coil 6 with respect to the first magnet 51 (one side Z1 of the first direction Z), and the coil 6 with respect to the second magnet 52. It has a second yoke 82 arranged on the opposite side (the other side Z2 of the first direction Z).

The first yoke 81 has a flat plate-shaped first plate portion 811, and the first magnet 51 is held on the surface of the first plate portion 811 on the other side Z2 in the first direction Z. Recesses 812 are provided at the central portions of both ends of the first plate portion 811 in the third direction X.

The second yoke 82 has a flat plate-shaped second plate portion 821 and a connecting portion 822 bent from both ends of the second plate portion 821 in the third direction X to one side Z1 of the first direction Z. The second magnet 52 is held on the surface of one side Z1 of the first direction Z of the second plate portion 821. A convex portion 823 is provided at the central portion of the end portion of one side Z1 of the first direction Z of the connecting portion 822. Therefore, when the first yoke 81 and the second yoke 82 are overlapped in the first direction Z, the yoke 8 is assembled by fitting the concave portion 812 and the convex portion 823. Further, the first yoke 81 and the second yoke 82 can be connected by fixing the concave portion 812 and the convex portion 823 by welding or the like.

(Support)
As shown in FIGS. 1, 2 and 3, in the support 2, the case 9 overlaps the first case member 91 and the first case member 91 from the other side Z2 in the first direction Z. And have. A movable body 3, a connecting body 4, a coil 6, and a coil holder 7 are housed between the first case member 91 and the second case member 92. A first opening 93 is formed on the side surface of one side Y1 of the second direction Y of the case 9, and the wiring board 11 is exposed from the first opening 93.

The first case member 91 has a first end plate portion 911 facing the first direction Z and a side plate portion 912 protruding from the edge of the first end plate portion 911 to the other side Z2 in the first direction Z. A first notch 913 is provided in the central portion of the side plate portion 912 on one side Y1 of the second direction Y. A second notch 914 is provided in the central portion of the side plate portion 912 on the other side of the second direction Y. The second case member 92 has a second end plate portion 921 facing the first direction Z and a side plate portion 912 protruding from the end edge of the second end plate portion 921 to one side Z1 in the first direction. A first notch 923 is provided in the central portion of the side plate portion 922 on one side Y1 of the second direction Y. A second notch 924 is provided in the central portion of the side plate portion 922 on the other side of the second direction Y. Reinforcing ribs 911a and 921a extending in the second direction Y are formed at the center of the first end plate portion 911 and the second end plate portion 921 in the third direction X.

When the first case member 91 and the second case member 92 are overlapped in the first direction Z, the side plate portion 912 of the first case member 91 covers from the outside of the side plate portion 922 of the second case member 92. In this state, the first case member 91 and the second case member 92 are fixed by welding or the like. When the first case member 91 and the second case member 92 are fixed, the first notch 913 of the first case member 91 and the first notch 923 of the second case member 92 form the first opening 93. Then, the second notch 914 of the first case member 91 and the second notch 924 of the second case member 92 form the second opening 94.

The coil holder 7 shown in FIGS. 6, 7 and 8 is made of a resin material. The coil holder 7 holds the coil 6 and the wiring board 11. The coil holder 7 has a main body portion 71 having a rectangular shape when viewed from the first direction Z, and side wall portions 72 projecting from both ends of the main body portion 71 in the second direction Y in the first direction Z. The main body 71 is provided with a coil arrangement hole 73 penetrating in the first direction Z, and the coil 6 is arranged in the coil arrangement hole 73.

The side wall portion 72 has a first side wall portion 74 arranged on one side Y1 of the second direction Y and a second side wall portion 75 arranged on the other side Y2 of the second direction Y. The first side wall portion 74 and the second side wall portion 75 project from both ends of the main body portion 71 in the third direction X to both sides in the third direction X. Specifically, the end portion of one side X1 of the third direction X of the first side wall portion 74 is one side X1 of the third direction X from the end portion 711 of the one side X1 of the third direction X of the main body portion 71. To form the first inner wall portion 741. The end of the other side X2 of the first side wall portion 74 in the third direction X protrudes from the end portion 712 of the other side X2 of the third direction X of the main body portion 71 toward the other side X2 of the third direction X, and is the second. The inner wall portion 742 is formed. The first inner wall portion 741 and the second inner wall portion 742 are surface portions facing the other side Y2 in the second direction Y.

The end of one side X1 of the third direction X of the second side wall portion 75 projects from the end portion 711 of the one side X1 of the third direction X of the main body 71 to one side X1 of the third direction X, and the first The inner wall portion 751 is formed. The end of the other side X2 of the second side wall portion 75 in the third direction X protrudes from the end portion 712 of the other side X2 of the third direction X of the main body portion 71 toward the other side X2 of the third direction X, and is the second. The inner wall portion 752 is formed. The first inner wall portion 751 and the second inner wall portion 752 are surface portions facing one side Y1 of the second direction Y.

As shown in FIG. 5, in the coil holder 7, the first inner wall portion 741 of the first side wall portion 74 and the first inner wall portion 751 of the second side wall portion 75 are connected to the first connecting portion 8221 of the yoke 8 in the second direction. Oppose with Y. In the coil holder 7, the second inner wall portion 742 of the first side wall portion 74 and the second inner wall portion 752 of the second side wall portion 75 face the first connecting portion 8221 of the yoke 8 in the second direction Y. Therefore, the first inner wall portion 741 and the second inner wall portion 742 of the first side wall portion 74 each define the movable range of one side Y1 of the second direction Y when the movable body 3 moves in the second direction Y. Functions as a surface. The first inner wall portion 751 and the second inner wall portion 752 of the second side wall portion 75 serve as contact surfaces that define the movable range of the other side Y2 of the second direction Y when the movable body 3 moves in the second direction Y. Function.

As shown in FIG. 5, in the coil holder 7, the end portion 711 of the main body portion 71 faces the first connecting portion 8221 of the two connecting portions 822 in the second direction Y, and the end portion 712 of the main body portion 71. Opposes each other in the second direction Y of the second connecting portion 8222 of the two connecting portions 822. Therefore, the end portion 711 and the end portion 712 of the main body portion 71 function as a hit portion that defines a movable range when the movable body 3 moves in the second direction Y. In this embodiment, the end portion 711 and the end portion 712 of the main body portion 71 are covered with the first plate 76 and the second plate 77, which will be described later, so that the end portion 711 and the end portion 712 of the main body portion 71 are covered. It functions as a perforated portion via the first plate 76 and the second plate 77.

As shown in FIGS. 6, 7 and 8, the first side wall portion 74 is provided with a first positioning convex portion 743 projecting to one side Y1 of the second direction Y. A positioning step portion 744 recessed on the other side Y2 in the second direction Y is provided in the central portion of the first positioning convex portion 743. The wiring board 11 is fitted into the positioning step portion 744 from one side Y1 of the second direction Y. The second side wall portion 75 is provided with a second positioning convex portion 753 that projects to the other side Y2 in the second direction Y.

As shown in FIGS. 1, 2 and 5, the first positioning convex portion 743 fits into the first opening 93 of the case 9 and projects from the case 9 to one side Y1 of the second direction Y. Similarly, the second positioning convex portion 753 fits into the second opening 94 of the case 9 and projects from the case 9 to the other side Y2 in the second direction Y. As shown in FIG. 5, the first side wall portion 74 and the second side wall portion 75 come into contact with the inner surface of the side plate portion 922 of the second case member 92 in the second direction Y. Therefore, the first positioning convex portion 743 and the second positioning convex portion 753 position the coil holder 7 in the first direction Z and the second direction Y with respect to the case 9. The first side wall portion 74 and the second side wall portion 75 position the coil holder 7 in the second direction Y with respect to the case 9.

The first plate 76 and the second plate 77 are attached to the coil holder 7 so as to overlap the main body 71 from one side Z1 and the other side Z2 of the first direction Z. The first plate 76 and the second plate 77 are made of a non-magnetic material. In this embodiment, the first plate 76 and the second plate 77 are made of a non-magnetic stainless steel plate. The first plate 76 and the second plate 77 cover the main body 71 and the ends 711 and 712 of the main body 71.

The first plate 76 has a claw portion 761 that obliquely protrudes from both sides of the second direction Y to one side Z1 of the first direction Z. In this embodiment, there are four claws 761. The second plate 77 has a claw portion 771 that obliquely protrudes from both ends of the second direction Y to the other side Z2 of the first direction Z. In this embodiment, there are four claws 771. The claw portions 761 and 771 elastically contact the first side wall portion 74 and the second side wall portion 75. As a result, the first plate 76 and the second plate 77 are held by the coil holder 7.

The coil 6 is oval. The coil 6 is arranged in the coil arrangement hole 73 and is fixed to the coil holder 7 by an adhesive. The adhesive is filled in the air core portion 60 of the coil 6 and flows between the coil 6 and the coil holder 7 to be cured. The adhesive is between the coil 6 and the first plate 76, between the first plate 76 and the coil holder 7, between the coil 6 and the second plate 77, and between the second plate 77 and the coil holder 7. It flows in and hardens. Therefore, the coil 6, the first plate 76, the second plate 77, and the coil holder 7 are fixed by the adhesive layer to which the adhesive has flowed and hardened. The method of fixing the coil 6 to the coil holder 7 may be an insert integral molding or the like, in addition to the method using an adhesive.

The actuator 1 supplies power to the coil 6 from the outside (upper device) via the wiring board 11. The wiring board 11 is held by the coil holder 7 and exposed from the first opening 93 of the case 9. The drawing portion 61 drawn out from the coil 6 is drawn out to the main body 71 of the coil holder 7 to one side Y1 of the second direction Y, bent to one side Z1 of the first direction Z, and electrically with the wiring board 11. Connecting.

(Magnetic drive circuit)
In the actuator 1 configured in this way, as shown in FIG. 5, the actuator 1 includes a magnetic drive circuit 10 including a pair of an oval coil 6 and a magnet 5. The magnetic drive circuit 10 generates a driving force in the second direction Y in the in-plane direction including the second direction Y and the third direction X. Therefore, for example, by adjusting the AC waveform applied to the coil 6, the acceleration at which the movable body 3 moves to one side X1 of the second direction Y and the movable body 3 move to the other side X2 of the second direction Y. The acceleration to be applied can be different. Therefore, a person who uses a device or the like to which the actuator 1 is attached can experience directional vibration in the second direction Y.

(Structure of projecting portion 83 and connecting body 4)
In this embodiment, the following structure is adopted in order to make the movable body 3 supported by the support 2 via the connecting body 4. In the present embodiment, the connecting body 4 is a viscoelastic member, and is joined to both the movable body 3 and the support 2 by the adhesiveness of the connecting body 4 itself or by an adhesive.

First, in the movable body 3, the protruding portion 83 whose size in the first direction Z is smaller than that of the movable body 3 protrudes in the direction intersecting the first direction Z, and the connecting body 4 is the support body 2. , The portion facing the protruding portion 83 in the first direction Z and the protruding portion 83 are connected to each other. In the present embodiment, the protrusion 83 projects toward the third direction X, which intersects both the first direction Z and the second direction Y.

In the present embodiment, the protrusions 83 are provided as the first protrusion 831 and the second protrusion 832 in each of the one side X1 and the other side X2 in the direction intersecting the first direction Z (third direction X). Has been done. Therefore, the connecting body 4 is among the first connecting body 41 connected to the first protruding portion 831 and the portion facing the first protruding portion 831 in the first direction Z and the first protruding portion 831, and the support 2. , The second protruding portion 832 is provided as a second connecting body 42 connected to a portion facing the second protruding portion 832 in the first direction Z and the second protruding portion 832.

Further, the protruding portion 83 (first protruding portion 831 and second protruding portion 832) protrudes from an intermediate position in the first direction Z in the movable body 3, and the connecting body 4 is a protruding portion 83 of the support 2. Between the portion facing the protruding portion 83 on one side Z1 of the first direction Z and the protruding portion 83, and with respect to the portion of the support 2 facing the protruding portion 83 on the other side Z2 of the first direction Z. It is provided in each of the parts 83.

Therefore, the first connecting body 41 is provided between the portion of the support 2 that faces the first protruding portion 831 on one side Z1 of the first direction Z and the first protruding portion 831. It is composed of a second portion 412 provided between a portion of the portion 411 and the support 2 that faces the protruding portion 83 on the other side Z2 of the first direction Z and the first protruding portion 831. Further, the second connecting body 42 is provided between a portion of the support 2 that faces the second protruding portion 832 on one side Z1 of the first direction Z and the second protruding portion 832. The portion 421 and the support 2 are composed of a second portion 422 provided between a portion of the support 2 that faces the second protrusion 832 on the other side Z2 of the first direction Z and the second protrusion 832.

In the present embodiment, the case 9 has a first end plate portion 911 that overlaps the movable body 3 from one side Z1 of the first direction Z, and a second end plate portion 921 that overlaps the movable body 3 from the other side Z2 of the first direction Z. The first end plate portion 911 and the second end plate portion 921 have, respectively, with respect to the protrusion 83 (the first protrusion 831 and the second protrusion 832) on one side of the first direction Z. Z1 and the other side Z2 face each other.

Therefore, the first connecting body 41 is provided between the first portion 411 provided between the first end plate portion 911 and the first protruding portion 831 and between the second end plate portion 921 and the first protruding portion 831. It consists of a second portion 412 provided in. Further, the second connecting body 42 is provided between the first portion 421 provided between the first end plate portion 911 and the second protruding portion 832, and between the second end plate portion 921 and the second protruding portion 832. It consists of a second portion 422 provided. The connecting bodies 4 (first portions 411 and 421, and second portions 421 and 422) have the same plane size, thickness, and the like.

In the present embodiment, the connecting bodies 4 (first part 411, 421, and second parts 421, 422) are each arranged in a state of being compressed to the same thickness in the first direction Z, and the connecting body 4 itself adheres. It is joined to both the protruding portion 83 of the movable body 3 and the end plate portion (first end plate portion 911 and second end plate portion 921) of the support 2 by sex or an adhesive.

In this embodiment, the protrusion 83 is provided on the yoke 8. More specifically, the first protruding portion 831 is a portion of the connecting portion 822 that protrudes from the first connecting portion 8221 to one side X1 of the third direction X. The second protruding portion 832 is a portion of the connecting portion 822 that protrudes from the second connecting portion 8222 to the other side X2 in the third direction X. Therefore, each of the protruding portions 83 (the first protruding portion 831 and the second protruding portion 832) has a plate shape with the plate thickness direction directed to the first direction Z.

In the connecting body 4, viscoelasticity is a property that combines both viscosity and elasticity, and is a property that is prominently found in polymer substances such as plastics and rubbers. Therefore, various gel members can be used as the connecting body 4 (viscoelastic member). Further, as the connecting body 4 (viscous elastic member), 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.), thermoplastic elastomers, and modified materials thereof may be used. Further, as the elastic connecting body 4, a spring such as a leaf spring or a coil spring can be used.

In this embodiment, a gel-like member (gel-like damper member) such as a silicone gel is used as the connecting body 4. Silicone gels with a needle insertion degree of 80 to 110 degrees are used. The degree of needle insertion is defined by JIS-K-2207 and JIS-K-2220, and the smaller this value is, the harder it is.

Here, the viscoelastic member has linear or non-linear stretching characteristics depending on the stretching direction thereof. For example, when a viscoelastic member is pressed in its thickness direction (radial direction and central axis L direction) and is compressively deformed, it has a stretch characteristic in which a non-linear component is larger than a linear component, while it is pulled and stretched. In the case, the linear component has a larger elastic characteristic than the non-linear component. Also, when deforming in the direction intersecting the thickness direction (shearing direction), the linear component has a larger deformation characteristic than the non-linear component. In this embodiment, the viscoelastic member is configured to be deformed in the shearing direction (circumferential direction) when the movable body 3 vibrates. Therefore, since the viscoelastic member is deformed in a range of high linearity, it is possible to obtain vibration characteristics with good linearity from the actuator 1.

(Main effect of this form)
In the present embodiment, in the movable body 3, the protruding portion 83 whose size in the first direction Z is smaller than that of the movable body 3 protrudes in the direction intersecting the first direction Z, and the connecting body 4 is the support 2. Of these, a portion facing the protruding portion 83 in the first direction Z and the protruding portion 83 are connected to each other. Therefore, since the connecting body 4 does not overlap the coil 6 and the magnet 5 in the first direction Z, the size of the actuator 1 in the first direction Z where the coil 6 and the magnet 5 overlap can be reduced. Further, since the connecting body 4 does not overlap the coil 6 and the magnet 5 in the first direction Z, the dimension (thickness) of the connecting body 4 in the first direction Z can be increased, so that the movable body 3 can be increased. The movement distance (stroke) with respect to the support 2 can be increased to increase the acceleration of the movable body 3. Therefore, the vibration generated by the actuator 1 can be increased.

Further, the protruding portion 83 is provided on the yoke 8 and has a plate shape with the plate thickness direction directed to the first direction Z. Therefore, the size of the actuator 1 in the first direction Z can be reduced, and the size (thickness) of the connecting body 4 in the first direction Z can be increased to increase the moving distance of the movable body 3 with respect to the support 2. It is easy to increase the (stroke) to increase the acceleration of the movable body 3.

Further, the protruding portion 83 is provided as a first protruding portion 831 and a second protruding portion 832 on each of the one side X1 and the other side X2 of the third direction X, and the connecting body 4 is a support body 2 of the supports 2. Of the first connecting body 41 connected to the first protruding portion 831 and the portion facing the first protruding portion 831 in the first direction Z, and the support 2, the portion facing the second protruding portion 832 in the first direction Z. It is provided as a second connecting body 42 connected to the portion to be formed and the second protruding portion 832. Further, the protruding portion 83 (first protruding portion 831 and second protruding portion 832) protrudes from an intermediate position in the first direction Z in the movable body 3, and the connecting body 4 is a protruding portion 83 of the support 2. Between the portion facing the protruding portion 83 on one side Z1 of the first direction Z and the protruding portion 83, and with respect to the portion of the support 2 facing the protruding portion 83 on the other side Z2 of the first direction Z. It is provided in each of the parts 83. Therefore, the movable body 3 is supported by the support body 2 in a well-balanced and stable state.

(Other embodiments)
In the above embodiment, the protruding portion 83 is projected in the third direction X intersecting the moving direction of the movable body 3 (second direction Y), but the protruding portion 83 is projected in the moving direction of the movable body 3 (second direction Y). It may be projected.

In the above embodiment, the first connection body 41 and the second connection body 42 are arranged on both sides of each of the pair of protrusions 83 in the direction in which the pair of protrusions 83 faces, but the configuration is limited to this. Not done. For example, the first connecting body 41 and the second connecting body 42 may be arranged only on one side Z1 of the first direction Z of the protruding portion 83, or only on the other side Z2 of the first direction Z of the protruding portion 83. It may be arranged. That is, the first connecting body 41 may be composed of the first portion 411, and the second connecting body 42 may be composed of the first portion 421. Further, the first connecting body 41 may be composed of the second portion 412, and the second connecting body 42 may be composed of the second portion 422. Even with this configuration, the thickness of the actuator 1 can be reduced and the thickness of the actuator 1 can be reduced as compared with the configuration in which the connector is arranged so as to overlap the magnetic drive circuit in the first direction Z. The thickness can be secured.

In the above embodiment, the connecting portion 822 of the yoke 8 is provided with the protruding portion 83, but the present invention is not limited to this configuration. For example, when a member such as a case covering the yoke 8 is used, a protruding portion may be provided on this member.

1 ... actuator, 2 ... support, 3 ... movable body, 4 ... connector, 5 ... magnet, 6 ... coil, 7 ... coil holder, 8 ... yoke, 9 ... case, 10 ... magnetic drive circuit, 41 ... first Connection body, 42 ... second connection body, 51 ... first magnet, 52 ... second magnet, 76 ... first plate, 77 ... second plate, 81 ... first yoke, 82 ... second yoke, 83 ... protrusion , 91 ... 1st case member, 92 ... 2nd case member, 411, 421 ... 1st part, 412, 422 ... 2nd part, 831 ... 1st protruding part, 832 ... 2nd protruding part, X ... 3rd direction , Y ... 2nd direction, Z ... 1st direction

Claims (8)

With the support
Movable body and
A connector having at least one of viscous and viscoelasticity and connected to the support and the movable body.
It has a magnet provided on one side of the support and the movable body, and a coil provided on the other side of the support and the movable body and facing the magnet in the first direction. A magnetic drive circuit that moves relative to the support in the second direction that intersects the first direction,
With
In the movable body, a protruding portion whose size in the first direction is smaller than that of the movable body protrudes in a direction intersecting the first direction.
The actuator is characterized in that the connecting body is connected to a portion of the support that faces the protruding portion in the first direction and the protruding portion. In the actuator according to claim 1,
The protruding portion protrudes from an intermediate position in the first direction of the movable body.
The connecting body is formed between a portion of the support that faces the protruding portion on one side in the first direction and the protruding portion, and of the support with respect to the protruding portion. An actuator characterized in that it is provided in each of a portion facing the other side in the first direction and the protruding portion. In the actuator according to claim 1 or 2.
An actuator characterized in that the protruding portion protrudes in a third direction intersecting both the first direction and the second direction. In the actuator according to any one of claims 1 to 3,
The connecting body is an actuator characterized by being a viscoelastic member. In the actuator according to any one of claims 1 to 4.
The actuator is characterized in that the protruding portion has a plate shape with the plate thickness direction directed in the first direction. In the actuator according to any one of claims 1 to 5.
The movable body is an actuator characterized in that the protrusions are provided on one side and the other side in a direction intersecting with the first direction. In the actuator according to any one of claims 1 to 6.
The support has a case for accommodating the movable body.
The case includes a first end plate portion facing the movable body on one side in the first direction, and a second end plate portion facing the movable body on the other side in the first direction. An actuator characterized by that. In the actuator according to any one of claims 1 to 7.
The magnet is provided on the movable body and is provided on the movable body.
The coil is provided on the support.
The movable body includes a yoke that overlaps the magnet from the side opposite to the coil.
The protrusion is an actuator provided on the yoke.

Images