JP2022065841A - Actuator - Google Patents

Abstract

To make a lead wire held by a lead wire holding portion difficult to move.SOLUTION: An actuator 1 includes a support 2 and a movable body 3, a connection body 10 connected to the support 2 and the movable body 3, and a magnetic drive mechanism 6 provided with a magnet 61 and a coil 62 to move the movable body 3 relative to the support 2. The support 2 includes a board fixing portion 69 to which a wiring board 7 is fixed, and the board fixing portion 69 includes a lead wire holding portion 80 that holds a lead wire 8 electrically connected to the coil 62 via the wiring board 7. The lead wire holding portion 80 includes a through hole 82 through which the lead wire 8 is passed, and a disconnection prevention portion 83 projecting from the inner surface of the through hole 82. The protrusion size of the disconnection prevention portion 83 increases toward the side of the wiring board 7. Therefore, when the lead wire 8 is passed through the through hole 82, the lead wire 8 is difficult to be caught, and when the lead wire 8 is pulled to the side opposite to the wiring board 7, the lead wire 8 is difficult to be pulled out.SELECTED DRAWING: Figure 5

Description

The present invention relates to an actuator that moves a movable body relative to a support.

Patent Document 1 includes a support and a movable body, and a magnetic drive mechanism for vibrating the movable body with respect to the support, and the movable body and the support are connected by a connecting body having elasticity and viscoelasticity. There is. In the actuator of Patent Document 1, the magnetic drive mechanism includes a magnet arranged on a movable body and a coil arranged on a support body. The movable body includes a yoke on which a magnet is fixed, and the support body includes a case member (cover) for accommodating the movable body and a holder for holding the coil. The connecting body is a gel-like member obtained by cutting a sheet-like gel into a rectangular shape, and is arranged at a position where the yoke and the cover face each other. A wiring board for supplying power to the coil is fixed to the outer surface of the cover and the holder.

Japanese Unexamined Patent Publication No. 2019-13086

It is not preferable that the lead wire connected to the wiring board of the actuator is loaded on the portion soldered to the land on the wiring board. Therefore, it has been proposed to provide a lead wire holding portion on the case member to which the wiring board is fixed. For example, it has been proposed to provide a lead wire holding portion provided with a hole for passing the lead wire.

However, if the lead wire is simply passed through the hole, the lead wire will move in the direction of coming out of the hole when the lead wire is pulled. The length of the lead wire drawn from the lead wire holding part to the opposite side of the wiring board is designed to be the specified length according to the distance from the power supply, but if the lead wire moves in the direction of coming out of the hole. , There is a problem that the length of the lead wire drawn from the lead wire holding portion cannot be maintained at the specified length.

In view of the above problems, an object of the present invention is to make the lead wire held by the lead wire holding portion difficult to move.

In order to solve the above problems, the actuator according to the present invention includes a support and a movable body, a connecting body connected to the support and the movable body and having at least one of elasticity and viscoelasticity, and a magnet and a coil. The support comprises a magnetic drive mechanism that moves the movable body relative to the support, and the support includes a lead wire holding portion that holds a lead wire electrically connected to the coil. The lead wire holding portion is characterized by including a lead wire accommodating portion in which the lead wire is arranged and a disconnection preventing portion protruding from the inner surface of the lead wire accommodating portion.

In the present invention, the lead wire holding portion is provided with a pull-out prevention portion that protrudes from the inner surface of the lead wire accommodating portion. Therefore, since the disconnection prevention portion bites into the lead wire, it is difficult to move when the lead wire is pulled. Therefore, the length of the lead wire drawn from the lead wire holding portion can be kept at a designated length.

In the present invention, the lead wire accommodating portion is a through hole, and the disconnection prevention portion is a rib extending in the direction in which the through hole extends. In this way, when the rib extending in the direction through which the lead wire is passed is provided, the lead wire can be easily passed through the through hole.

In the present invention, it is preferable that a wiring board fixed to the support is provided, and the coil and the lead wire are electrically connected to the wiring board. In this way, if the coil and the lead wire are connected via the wiring board, the wiring connection is easy. In addition, it is possible to flexibly respond to changes in the number of coils and changes in arrangement.

In the present invention, the lead wire accommodating portion includes a first opening opening on the wiring board side and a second opening opening on the side opposite to the first opening portion, and the disconnection prevention portion is provided. It is preferable that the protrusion height increases toward the side of the first opening. With such a shape, it is difficult for the lead wire to be caught in the disconnection prevention portion when the lead wire is passed with the tip facing the wiring board side. Further, when the lead wire is pulled on the opposite side of the wiring board, the lead wire is caught in the most protruding portion. Therefore, the lead wire is difficult to move.

In the present invention, it is preferable that the disconnection prevention portion is provided on the edge of the first opening or the edge of the second opening. By doing so, the omission prevention portion can be confirmed from the outside. In addition, it can be confirmed that the disconnection prevention portion is biting into the lead wire.

In the present invention, the inner surface of the lead wire accommodating portion is provided with a tapered surface facing the disconnection prevention portion, and the tapered surface is directed toward the disconnection prevention portion toward the side of the first opening. It is preferable to incline. In this way, the disconnection prevention portion easily bites into the lead wire extending along the tapered surface.

According to the present invention, the lead wire holding portion is provided with a pull-out prevention portion that protrudes from the inner surface of the lead wire accommodating portion. Therefore, since the disconnection prevention portion bites into the lead wire, it is difficult to move when the lead wire is pulled. Therefore, the length of the lead wire drawn from the lead wire holding portion can be kept at a designated length.

It is a perspective view of the actuator which concerns on embodiment of this invention. It is an exploded perspective view of the actuator shown in FIG. It is sectional drawing (AA sectional drawing of FIG. 1) of the actuator shown in FIG. It is sectional drawing (BB sectional view of FIG. 1) which cut | cut the actuator shown in FIG. 1 in the direction orthogonal to FIG. It is a perspective view of the board fixing part. It is a side view of the lead wire holding part. It is sectional drawing of the lead wire holding part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment described below, the support 2 includes a cylindrical case 20, and the movable body 3 is arranged inside the case 20 and vibrates in the axial direction with respect to the support 2. The actuator to which the invention is applied may adopt an embodiment in which the support is rectangular parallelepiped and the movable body vibrates in the longitudinal direction of the support or in a direction orthogonal to the longitudinal direction.

Further, in the embodiment described below, the magnetic drive mechanism 6 that vibrates the movable body 3 with respect to the support body 2 includes a magnet 61 arranged on the movable body 3 and a coil 62 arranged on the support body 2. However, in the present invention, a configuration in which the arrangement of the magnet 61 and the coil 62 is reversed may be adopted. That is, the magnetic drive mechanism 6 may include a coil 62 arranged on the movable body 3 and a magnet 61 arranged on the support 2.

(overall structure)
FIG. 1 is a perspective view of the actuator 1 according to the embodiment of the present invention. FIG. 2 is an exploded perspective view of the actuator 1 shown in FIG. 3 and 4 are cross-sectional views of the actuator 1 shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a cross-sectional view cut at the position BB of FIG. 1, and is a cross-sectional view cut in a direction orthogonal to FIG. In the following description, the direction in which the central axis L of the movable body 3 extends is the axial direction, one side in the axial direction is L1, and the other side in the axial direction is L2.

As shown in FIGS. 1 to 4, the actuator 1 attaches the support body 2, the movable body 3, the connecting body 10 connected to the support body 2 and the movable body 3, and the movable body 3 to the support body 2. It is provided with a magnetic drive mechanism 6 for relative movement. The connector 10 comprises at least one of elastic and viscoelastic. The magnetic drive mechanism 6 includes a magnet 61 arranged on the movable body 3 and a coil 62 arranged on the support body 2, and moves the movable body 3 relative to the support body 2 in the axial direction. As shown in FIGS. 3 and 4, the movable body 3 is connected to the support 2 via the connecting body 10 at each position of the end portion of the one side L1 in the axial direction and the end portion of the other side L2 in the axial direction. Be connected.

(Support)
As shown in FIGS. 2 to 4, the support 2 includes a cylindrical case 20, a first lid member 21 that closes an opening of L1 on one side in the axial direction of the case 20, and the other side in the axial direction of the case 20. It has a second lid member 22 that closes the opening of L2, and a coil holder 4 that is arranged between the first lid member 21 and the second lid member 22 on the inner peripheral side of the case 20. In this embodiment, the case 20, the first lid member 21, the second lid member 22, and the coil holder 4 are made of resin. Further, the support 2 has an inner circumference of the case 20 at a position separated from the first outer frame member 51 fitted on the inner peripheral side of the coil holder 4 and the other side L2 in the axial direction with respect to the first outer frame member 51. It has a second outer frame member 52 that fits on the side. The first outer frame member 51 and the second outer frame member 52 have the same shape and are arranged in opposite directions in the axial direction.

(Connector)
The connecting body 10 includes an annular first connecting body 11 joined to the inner peripheral surface of the first outer frame member 51 and an annular second connecting body 12 joined to the inner peripheral surface of the second outer frame member 52. Be prepared. The first connecting body 11 is arranged on one end side of the movable body 3 in the axial direction, and the second connecting body 12 is arranged on one end side of the movable body 3 in the axial direction. As will be described later, the first connecting body 11 and the second connecting body 12 are gel-like members obtained by molding a gel material, and the first outer frame member 51 and the second outer frame member 52 due to the adhesiveness of the gel-like member itself. Is joined to. In this embodiment, the first connecting body 11 is connected to the support 2 by press-fitting the first outer frame member 51 into the coil holder 4 and fixing the first outer frame member 51. Further, the second connecting body 12 is connected to the support 2 by press-fitting the second outer frame member 52 into the case 20 and fixing the second outer frame member 52.

(Coil holder)
As shown in FIG. 2, the coil holder 4 includes an annular first outer frame member fixing portion 41 and a body portion 42 protruding from the first outer frame member fixing portion 41 to the other side L2 in the axial direction. , The coil 62 is arranged around the body portion 42. The end of the coil wire 63 drawn out from the coil 62 is entwined with two terminal pins 64 protruding radially outward from the first outer frame member fixing portion 41 of the coil holder 4. As shown in FIG. 1, the terminal pin 64 projects to the outside of the case 20 and is connected to the wiring board 7.

As shown in FIG. 4, the coil holder 4 includes a first step portion 44 that positions the first outer frame member 51 in the axial direction. The first outer frame member fixing portion 41 surrounds the outer peripheral side of the first outer frame member 51. A first recess 43 recessed on the other side L2 in the axial direction is provided on the inner peripheral surface of the first outer frame member fixing portion 41, and the first outer frame member 51 is press-fitted into the first recess 43. The first step portion 44 is provided at the end of L2 on the other side in the axial direction of the first recess 43. In this embodiment, the annular step portion 511 formed on the outer peripheral surface of the first outer frame member 51 abuts on the first step portion 44 in the axial direction.

(Case)
The case 20 includes a cylindrical case body 24 and a second outer frame member fixing portion 25 arranged on the inner peripheral side of the case body 24. The second outer frame member fixing portion 25 is arranged at a position separated from the coil holder 4 on the other side L2 in the axial direction. As shown in FIGS. 2 and 4, the second outer frame member fixing portion 25 projects from the inner peripheral surface of the case main body 24 toward the inner peripheral side, and is integrally molded with the case main body 24.

The case 20 includes a second step portion 45 that positions the second outer frame member 52 in the axial direction. As shown in FIGS. 3 and 4, the inner peripheral surface of the second outer frame member fixing portion 25 is provided with a second recess 46 recessed on one side L1 in the axial direction, and the second outer frame member 52 is a second. 2 It is press-fitted into the recess 46. The second step portion 45 is provided at the end of L1 on one side in the axial direction of the second recess 46. In this embodiment, the annular step portion 521 formed on the outer peripheral surface of the second outer frame member 52 abuts on the second step portion 45 in the axial direction.

Further, the case 20 includes a third stage portion 47 for positioning the coil holder 4 in the axial direction. As shown in FIG. 4, the third step portion 47 is formed on the inner peripheral surface of the case main body 24. As shown in FIGS. 1 and 4, a plurality of groove portions 29 extending in the axial direction are formed on the inner peripheral surface of the case body 24 into which the coil holder 4 is fitted, and the end of each groove portion 29 on the other side L2 in the axial direction. A third step portion 47 is formed in the portion. As shown in FIG. 2, the coil holder 4 includes a plurality of convex portions 49 protruding from the outer peripheral surface of the first outer frame member fixing portion 41. When assembling the support 2, each convex portion 49 of the coil holder 4 is fitted into each groove portion 29 of the case body 24 from one side L1 in the axial direction, and abuts on the third step portion 47 in the axial direction. As a result, the coil holder 4 is press-fitted into the case body 24 and fixed, and the coil holder 4 is positioned in the axial direction.

(Cover member)
As shown in FIGS. 3 and 4, the first lid member 21 is fixed to the case body 24 from one side L1 in the axial direction of the first outer frame member fixing portion 41 provided in the coil holder 4. Further, the second lid member 22 is fixed to the case main body 24 from the other side L2 in the axial direction of the second outer frame member fixing portion 25. As shown in FIG. 2, the first lid member 21 and the second lid member 22 are respectively arranged at equal intervals in the circumferential direction on the outer peripheral edge of the lid portion 26 and the circular lid portion 26 when viewed from the axial direction. A plurality of locking portions 27 are provided. In this embodiment, the first lid member 21 and the second lid member 22 each include three locking portions 27. The locking portion 27 is a claw portion extending in an inclined direction extending from the lid portion 26 toward the outer peripheral side.

The locking portion 27 is elastically deformed in the radial direction and pushed together with the lid portion 26 toward the inner peripheral side of the case body 24. The case 20 includes a regulating portion 28 that regulates the locking portion 27 from coming off the inside of the case 20. The restricting portion 28 is a convex portion protruding inward from the end of the case body 24. As shown in FIGS. 1 and 2, the regulating portions 28 are arranged at three locations at equal intervals at the ends of one side L1 and the other side L2 in the axial direction of the case main body 24, respectively. The restricting portion 28 abuts in the axial direction with respect to the tip of the locking portion 27. The first lid member 21 and the second lid member 22 are fixed to the case 20 in combination with the locking structure by the locking portion 27 and the regulating portion 28 and the fixing by the adhesive.

As shown in FIG. 2, the first outer frame member fixing portion 41 of the coil holder 4 has a groove portion 48 having a portion overlapping in the axial direction with the three regulation portions 28 provided on the case main body 24 cut out on the inner peripheral side. To prepare for. Therefore, when the coil holder 4 is inserted into the case main body 24, it is possible to prevent the first outer frame member fixing portion 41 and the restricting portion 28 from interfering with each other.

(Wiring drawer)
As shown in FIGS. 1 and 3, the support 2 includes a wiring lead-out portion 60 for pulling out a terminal pin 64 in which a coil wire 63 drawn out from the coil 62 of the magnetic drive mechanism 6 is entwined. The wiring lead-out portion 60 includes a notch portion 65 (see FIG. 2) in which the edge of one side L1 in the axial direction of the case 20 is cut out on the other side L2 in the axial direction, and the circumferential direction of the outer peripheral edge of the first lid member 21. It is a gap provided between a part of the cover 66 extending from a part of the cover 66 to the other side L2 in the axial direction. When fixing the first lid member 21 to the case 20, the cover 66 is inserted from one side in the axial direction with respect to the notch portion 65.

The first outer frame member fixing portion 41 of the coil holder 4 is arranged on the inner peripheral side of the notch portion 65. In this embodiment, two terminal pins 64 extending from the first outer frame member fixing portion 41 to the outer peripheral side are arranged in the wiring lead-out portion 60. A coil wire 63 drawn from the coil 62 is entwined at the base of each terminal pin 64.

(Board fixing part)
The case 20 includes a substrate fixing portion 69 formed on the other side L2 of the notch portion 65. In the wiring lead-out portion 60, an end portion of the wiring board 7 fixed to the substrate fixing portion 69 is arranged. The terminal pin 64 is passed through two holes 71 (see FIG. 2) provided in the wiring board 7, and is electrically connected to a land 72 provided at the edge of the hole 71. The wiring board 7 includes two lands 72 arranged in the circumferential direction, two lands 73 arranged in the axial direction, and a wiring pattern 74 connecting the lands 72 and 73. A lead wire 8 for feeding power to the coil 62 is connected to the land 73.

5 (a) and 5 (b) are perspective views of the substrate fixing portion 69. FIG. 5A shows a state in which the wiring board 7 and the lead wire 8 are not arranged, and FIG. 5B shows a state in which the wiring board 7 is fixed and the lead wire 8 is connected to the wiring board 7. .. As shown in FIGS. 2 and 5A, the substrate fixing portion 69 includes a flat substrate fixing surface 690. At the end of L1 on one side in the axial direction of the board fixing surface 690, a claw portion 691 for locking the end of the wiring board 7 is provided. On both sides of the claw portion 691 in the circumferential direction, a portion overlapping the hole 71 and the land 72 of the wiring board 7 is cut out to the other side L2 in the axial direction. Further, a locking groove 692 into which the end portion of the wiring board 7 is fitted is provided at the end portion of the other side L2 of the substrate fixing surface 690 in the axial direction. The wiring board 7 is fixed to the board fixing portion 69 by using the locking structure by the claw portion 691 and the locking groove 692 and the fixing by the adhesive in combination.

(Lead wire holding part)
The board fixing portion 69 includes a lead wire holding portion 80 that holds the lead wire 8 at a position adjacent to the wiring board 7 in the circumferential direction. The lead wire holding portion 80 includes a convex portion 81 protruding from the substrate fixing surface 690 and a through hole 82 penetrating the convex portion 81 in the circumferential direction. The through hole 82 is a lead wire accommodating portion in which two lead wires 8 are arranged. As shown in FIG. 5B, the lead wire holding portion 80 is adjacent to the two lands 73 provided on the wiring board 7 in the circumferential direction. The two lead wires 8 passed through the through holes 82 extend on the wiring board 7 toward different lands 73 and are soldered to the lands 73.

6 (a) and 6 (b) are side views of the lead wire holding portion 80. FIG. 6A is a side view seen from the wiring board 7 side, and FIG. 6B is a side view seen from the side opposite to the wiring board 7. Further, FIG. 7 is a cross-sectional perspective view of the lead wire holding portion 80, which is a view cut at the CC position of FIG. 6A. The through hole 82 is a first opening 821 that opens on the wiring board 7 side, and
A second opening 822 that opens on the side opposite to the wiring board 7 is provided. The first opening 821 opens on the side surface 811 on the wiring board 7 side of the convex portion 81, and the second opening 822 opens on the side surface 812 on the convex portion 81 opposite to the wiring board 7.

The lead wire holding portion 80 includes two disconnection prevention portions 83 protruding from the inner surface of the through hole 82. In this embodiment, the through hole 82 has a width capable of accommodating two lead wires 8. As shown in FIGS. 6 (a) and 7 (a), the pull-out prevention portion 83 is provided on the inner surface portion 823 on the upper side of the through hole 82. Further, as shown in FIGS. 5A and 6B, on the inner surface of the through hole 82, between the two lead wires 8 on the lower inner surface portion 824 facing the upper inner surface portion 823. The rib 84 arranged in is formed. The ribs 84 restrict the movement of the two lead wires 8 in the width direction in the through hole 82.

As shown in FIG. 7, the inner surface of the through hole 82 is provided with the tapered surfaces 85 and 86 facing each other. The tapered surfaces 85 and 86 are flat surfaces and are arranged substantially in parallel. The tapered surfaces 85 and 86 are provided at the end portion of the through hole 82 on the first opening 821 side (that is, the end portion on the wiring board 7 side). The upper tapered surface 85 is provided at the end of the upper inner surface portion 823 on the side of the first opening 821, and toward the upper side (that is, the outer peripheral side of the through hole 82) toward the side of the first opening 821. Tilt in the direction. The pull-out prevention portion 83 projects from the upper tapered surface 85. On the other hand, the lower tapered surface 86 is provided at the end of the lower inner surface portion 824 on the side of the first opening 821, and the direction toward the side of the first opening 821 is toward the side of the retaining portion 83. Inclined to.

The pull-out prevention portion 83 projects toward the inner peripheral side of the through hole 82. As shown in FIG. 7, the pull-out prevention portion 83 is a rib that extends linearly in the direction in which the through hole 82 extends. Further, the pull-out prevention portion 83 has a shape that protrudes from the upper tapered surface 85 toward the lower tapered surface 86, and the protruding dimension increases toward the side of the first opening 821. The end portion of the pull-out prevention portion 83 on the first opening 821 side has a triangular cross-sectional shape, and the tip portion is sharp.

As shown in FIG. 5B, when the two lead wires 8 are inserted into the through holes 82 from the side opposite to the wiring board 7, the disconnection prevention portion 83 bites into the covering material constituting the surface of the lead wires 8. Since the protrusion height of the disconnection prevention portion 83 increases toward the front side (that is, the side of the wiring board 7) in the insertion direction of the lead wire 8, when the lead wire 8 is inserted into the through hole 82, the disconnection prevention portion 83 is disconnected. The prevention portion 83 is less likely to get caught on the surface of the lead wire 8. Further, since the end portion on the wiring board 7 side of the disconnection prevention portion 83 has the largest protruding dimension and a sharp shape, when the lead wire 8 is pulled to the opposite side to the wiring board 7, the lead wire 8 has a sharp shape. The disconnection prevention portion 83 bites into the covering portion of the lead wire 8 and is caught. Therefore, the lead wire 8 is unlikely to come off on the side opposite to the wiring board 7. Further, since the through hole 82 is provided with a tapered surface 86 inclined toward the side of the retaining portion 83 on the inner surface portion 824 facing the retaining portion 83, the lead wire 8 is provided along the tapered surface 86. It is inserted while being pressed toward the pull-out prevention portion 83. Therefore, the disconnection prevention portion 83 easily bites into the surface of the lead wire 8.

(Movable body 3)
As shown in FIGS. 2 to 4, the movable body 3 has a support shaft 30 extending in the axial direction at the radial center of the support body 2. A magnet 61 and a yoke 35 are fixed to the support shaft 30 by a cylindrical first inner frame member 36 and a tubular second inner frame member 37. The support shaft 30 is a metal round bar. The first inner frame member 36 and the second inner frame member 37 are cylindrical bodies made of metal, and are provided with circular through holes. The first inner frame member 36 and the second inner frame member 37 have the same shape and are arranged in opposite directions in the axial direction.

As shown in FIGS. 3 and 4, an annular protrusion 361 protruding inward in the radial direction is formed at the end of the other side L2 in the axial direction on the inner peripheral surface of the first inner frame member 36. Therefore, when the first inner frame member 36 is press-fitted into the support shaft 30, the support shaft 30 is press-fitted into the annular protrusion 361. Further, on the inner peripheral surface of the second inner frame member 37, an annular protrusion 371 protruding inward in the radial direction is formed at the end of L1 on one side in the axial direction. Therefore, when the second inner frame member 37 is press-fitted into the support shaft 30, the support shaft 30 is press-fitted into the annular protrusion 371.

The magnet 61 is provided with a shaft hole 610 through which the support shaft 30 penetrates, and is fixed at substantially the center of the support shaft 30 in the axial direction. The yoke 35 includes a first yoke 31 that overlaps the magnet 61 on one side L1 in the axial direction, and a second yoke 32 that overlaps the magnet 61 on the other side L2 in the axial direction. The first yoke 31 has a disk shape provided with a shaft hole 310 through which the support shaft 30 penetrates. The second yoke 32 is composed of two members, a cup-shaped first magnetic member 33 and a disk-shaped second magnetic member 34. The first magnetic member 33 has a circular end plate portion 331 provided with a shaft hole 330 through which the support shaft 30 penetrates, and a cylindrical portion 332 extending from the outer edge of the end plate portion 331 to one side L1 in the axial direction. In this embodiment, the end plate portion 331 of the first magnetic member 33 is fixed to the end surface of the other side L2 in the axial direction of the magnet 61. The second magnetic member 34 includes a shaft hole 340 through which the support shaft 30 penetrates, and is fixed to the end plate portion 331 of the first magnetic member 33 from the side opposite to the magnet 61.

The movable body 3 is in the first inner position on both sides of the magnet 61 and the yoke 35 in the axial direction in a state where the support shaft 30 is passed through the shaft holes 310, 610, 330, 340 of each member constituting the magnet 61 and the yoke 35. The frame member 36 and the second inner frame member 37 are fixed to the support shaft 30. As a result, the first inner frame member 36 supports the magnet 61 and the yoke 35 from one side L1 in the axial direction, and the second inner frame member 37 supports the magnet 61 and the yoke 35 from the other side L2 in the axial direction. The magnet 61 and the yoke 35 are fixed to the support shaft 30.

In the second yoke 32, the inner diameter of the cylindrical portion 332 of the first magnetic member 33 is larger than the outer diameter of the magnet 61 and the first yoke 31. Therefore, when the magnet 61 and the first yoke 31 are superposed on the circular end plate portion 331 which is the bottom of the cylindrical portion 332, the cylindrical portion 332 is radially outward from the outer peripheral surface of the magnet 61 and the outer peripheral surface of the first yoke 31. It faces the outer peripheral surface of the magnet 61 and the outer peripheral surface of the first yoke 31 at separated positions. In this embodiment, a part of the coil 62 is arranged between the cylindrical portion 332 and the outer peripheral surface of the magnet 61. Further, a part of the coil 62 is arranged between the cylindrical portion 332 and the outer peripheral surface of the first yoke 31.

(Manufacturing method of connector)
In this embodiment, the first connecting body 11 and the second connecting body 12 are gel-like members obtained by molding a gel material. When molding the first connecting body 11, the first outer frame member 51 and the first inner frame member 36 are coaxially positioned by a jig between the first outer frame member 51 and the first inner frame member 36. An annular gap is formed, and the gel material is filled in the gap and heat-cured. As a result, the first connecting body 11 is joined to the inner peripheral surface of the first outer frame member 51 and the outer peripheral surface of the first inner frame member 36 due to the adhesiveness of the gel-like member itself. Before filling the gel material, the bonding strength can be increased by applying a bonding accelerator such as a primer to the inner peripheral surface of the first outer frame member 51 and the outer peripheral surface of the first inner frame member 36. .. Similarly, the second connecting body 12 is formed by forming an annular gap between the second outer frame member 52 and the second inner frame member 37, filling the gap with a gel material, and thermally curing the second connecting body 12. Will be done.

As described above, in the present embodiment, the connecting bodies 10 (first connecting body 11 and second connecting body 12) are arranged in the radial gap between the inner frame and the outer frame surrounding the outer peripheral side of the inner frame, respectively. , The inner frame and the outer frame are made into parts as a damper member connected by the connecting body 10. That is, the first connecting body 11 is made into a component by joining the first outer frame member 51 (outer frame) and the first inner frame member 36 (inner frame) at the time of molding. Similarly, the second connecting body 12 is also made into a component by joining the second outer frame member 52 (outer frame) and the second inner frame member 37 (inner frame) at the time of molding. Therefore, when assembling the actuator 1, the support 2 and the movable body 3 can be connected without performing the step of adhering the gel-like member.

The first connecting body 11 and the second connecting body 12 are viscoelastic members. For example, as the first connecting body 11 and the second connecting body 12, a gel-like member made of silicone gel or the like, natural rubber, diene rubber (for example, styrene / butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, acrylonitrile / butadiene) Various rubber materials such as non-diene rubber (for example, butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, urethane rubber, silicone rubber, fluororubber, etc.), thermoplastic elastomers, and modified materials thereof are used. be able to. In this embodiment, the first connecting body 11 and the second connecting body 12 are made of a silicone gel having a needle insertion degree of 90 degrees to 110 degrees.

(Actuator operation)
When the actuator 1 energizes the coil 62, the magnetic drive mechanism 6 generates a driving force for driving the movable body 3 in the axial direction. When the energization of the coil 62 is turned off, the movable body 3 returns to the origin position by the returning force of the connecting body 10. Therefore, by intermittently energizing the coil 62, the movable body 3 vibrates in the axial direction. Further, by adjusting the AC waveform applied to the coil 62, the acceleration at which the movable body 3 moves to one side L1 in the axial direction and the acceleration at which the movable body 3 moves to the other side L2 in the axial direction are different. be able to. Therefore, a person who has a device to which the actuator 1 is attached as a tactile device can experience vibration having directionality in the axial direction. Further, the speaker can be configured by using the actuator 1.

When the movable body 3 vibrates in the axial direction with respect to the support 2, the first connecting body 11 and the second connecting body 12 are deformed in the shearing direction following the vibration of the movable body 3. Gel-like members such as silicone gel have linear or non-linear stretching characteristics depending on the stretching direction. When the gel-like member is deformed in the shear direction, the linear component has a larger deformation characteristic than the non-linear component. Therefore, when the movable body 3 vibrates in the axial direction with respect to the support 2, the first connecting body 11 and the second connecting body 12 are deformed in a range of high linearity, so that vibration characteristics with good linearity are obtained. be able to.

When the movable body 3 moves in the radial direction, the first connecting body 11 and the second connecting body 12 are deformed in the crushing direction. Here, the spring constant when the gel-like member is deformed in the crushing direction is about three times the spring constant when the gel-like member is deformed in the shearing direction. Therefore, it is possible to suppress the movement of the movable body 3 in a direction different from the vibration direction (axis direction), and it is possible to suppress the collision between the movable body 3 and the support 2.

(Main effect of this form)
As described above, the actuator 1 of the present embodiment includes a support body 2 and a movable body 3, a connecting body 10 connected to the support body 2 and the movable body 3 and having at least one of elasticity and viscoelasticity, a magnet 61, and a magnet 61. It includes a coil 62, and has a magnetic drive mechanism 6 that moves the movable body 3 relative to the support 2. The support 2 includes a lead wire holding portion 80 that holds a lead wire 8 electrically connected to the coil 62. The lead wire holding portion 80 includes a through hole 82 (lead wire accommodating portion) in which the lead wire 8 is arranged, and includes a disconnection prevention portion 83 protruding from the inner surface of the through hole 82.

In this embodiment, when the lead wire 8 is held by the lead wire holding portion 80, the pull-out prevention portion 83 provided on the inner surface of the through hole 82 in which the lead wire 8 is arranged is provided on the surface of the lead wire 8 as a covering material. To bite into. Therefore, since the lead wire 8 is difficult to move when pulled, the length of the lead wire 8 drawn from the lead wire holding portion 80 to the side opposite to the wiring board 7 can be maintained at a designated length.

In this embodiment, a through hole 82 is provided as a lead wire accommodating portion, and the disconnection prevention portion 83 is a rib extending in the direction in which the through hole 82 extends. Therefore, when the lead wire 8 is passed through the through hole 82, the lead wire 8 is less likely to be caught in the disconnection prevention portion 83.

In this embodiment, the coil 62 and the lead wire 8 are electrically connected to the wiring board 7 fixed to the support 2. If the coil 62 and the lead wire 8 are connected via the wiring board 7, the wiring connection is easy. In addition, it is possible to flexibly respond to changes in the number of coils 62 and changes in arrangement.

In the present embodiment, the through hole 82 includes a first opening 821 that opens on the wiring board 7 side and a second opening 822 that opens on the side opposite to the first opening 821. The pull-out prevention portion 83 has a shape in which the protruding height increases toward the side of the first opening 821, and the end portion on the wiring board 7 side has the largest protruding shape. With such a shape, the lead wire 8 is less likely to be caught in the disconnection prevention portion 83 when the lead wire 8 is passed through the through hole 82 with the tip facing the wiring board 7 side. Further, when the lead wire 8 is pulled to the side opposite to the wiring board 7, the lead wire 8 is caught by the disconnection prevention portion 83. Therefore, the lead wire 8 is difficult to move.

In this embodiment, the pull-out prevention portion 83 is provided on the edge of the first opening portion 821. Therefore, the disconnection prevention unit 83 can be confirmed from the outside. Further, it can be confirmed that the disconnection prevention unit 83 is biting into the lead wire 8. The second opening 822 may be provided with a pull-out prevention portion. Even when the pull-out prevention portion is provided in the second opening portion 822, the position of the pull-out prevention portion 83 can be confirmed from the outside. Further, it can be confirmed that the disconnection prevention unit 83 is biting into the lead wire 8.

In this embodiment, the inner surface of the through hole 82 is provided with a tapered surface 86 facing the disconnection prevention portion 83. Since the tapered surface 86 is inclined toward the side of the retaining portion 83 toward the side of the first opening 821, the lead wire 8 inserted along the tapered surface 86 can be pressed against the retaining portion 83. can. Therefore, the disconnection prevention portion 83 easily bites into the lead wire 8.

(Modification example)
The lead wire holding portion 80 of the above embodiment has a structure in which the lead wire 8 is held through the through hole 82 (lead wire accommodating portion), but the lead wire accommodating portion may be a groove instead of the through hole 82. By providing the disconnection prevention portion on the inner surface of the groove, the disconnection prevention portion can be made to bite into the lead wire 8 to make it difficult to move.

1 ... actuator, 2 ... support, 3 ... movable body, 4 ... coil holder, 6 ... magnetic drive mechanism, 7 ... wiring board, 8 ... lead wire, 10 ... connection body, 11 ... first connection body, 12 ... first 2 connection body, 20 ... case, 21 ... first lid member, 22 ... second lid member, 24 ... case body, 25 ... second outer frame member fixing portion, 26 ... lid portion, 27 ... locking portion, 28 ... Regulator, 29 ... groove, 30 ... support shaft, 31 ... first yoke, 32 ... second yoke, 33 ... first magnetic member, 34 ... second magnetic member, 35 ... yoke, 36 ... first inner frame member, 37 ... 2nd inner frame member, 41 ... 1st outer frame member fixing part, 42 ... body part, 43 ... 1st recess, 44 ... 1st step part, 45 ... 2nd step part, 46 ... 2nd recess, 47 ... 3rd stage part, 48 ... groove part, 49 ... convex part, 51 ... first outer frame member, 52 ... second outer frame member, 60 ... wiring lead-out part, 61 ... magnet, 62 ... coil, 63 ... coil wire, 64 ... Terminal pin, 65 ... Notch, 66 ... Cover, 69 ... Board fixing part, 71 ... Hole, 72, 73 ... Land, 74 ... Wiring pattern, 80 ... Lead wire holding part, 81 ... Convex part, 82 ... Through hole, 83 ... Prevention part, 84 ... Rib, 85, 86 ... Tapered surface, 310, 330, 340, 610 ... Shaft hole, 331 ... End plate part, 332 ... Cylindrical part, 361, 371 ... Circular protrusion, 511 ... annular step portion, 690 ... substrate fixing surface, 691 ... claw portion, 692 ... locking groove, 811,821 ... side surface, 821 ... first opening,
822 ... second opening, 823, 824 ... inner surface portion, L ... central axis, L1 ... one side, L2 ... other side

Claims (6)

Supports and movable bodies,
A connecting body connected to the support and the movable body and having at least one of elasticity and viscoelasticity.
It comprises a magnet and a coil, and has a magnetic drive mechanism that moves the movable body relative to the support.
The support comprises a lead wire holder for holding a lead wire electrically connected to the coil.
The lead wire holding portion is an actuator including a lead wire accommodating portion in which the lead wire is arranged and a disconnection preventing portion protruding from the inner surface of the lead wire accommodating portion. The lead wire accommodating portion is a through hole and has a through hole.
The actuator according to claim 1, wherein the disconnection prevention portion is a rib extending in a direction in which the through hole extends. A wiring board fixed to the support is provided, and the wiring board is provided.
The actuator according to claim 1 or 2, wherein the coil and the lead wire are electrically connected to the wiring board. The lead wire accommodating portion includes a first opening that opens on the wiring board side and a second opening that opens on the side opposite to the first opening.
The actuator according to claim 3, wherein the pull-out prevention portion has a protrusion height that increases toward the side of the first opening. The actuator according to claim 4, wherein the pull-out prevention portion is provided on the edge of the first opening or the edge of the second opening. The inner surface of the lead wire accommodating portion is provided with a tapered surface facing the disconnection prevention portion.
The actuator according to claim 4 or 5, wherein the tapered surface is inclined toward the side of the disconnection prevention portion as the tapered surface is inclined toward the side of the first opening.

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