JP2022139489A - linear actuator - Google Patents

Abstract

To provide a linear actuator having a structure capable of providing a coil to a movable element while suppressing enlargement.SOLUTION: One embodiment of a linear actuator 10 comprises: a movable element 30 having a movable element body 31 and a coil 32 attached to the movable element body 31, and movable in a predetermined first direction; a magnet arranged facing the coil 32 in a second direction orthogonal to the first direction; a coil spring 50 elastically deforming in accordance with the movement of the movable element 30 in the first direction, and adding force in the first direction to the movable element 30; a case 20 accommodating the movable element 30, the magnet, and the coil spring 50 therein; and a first wiring member 62 at least a part of which is located outside the case 20. The first wiring member 62 is electrically connected to the coil 32 through the coil spring 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to linear actuators.

A linear actuator is known that has a mover that can move in a predetermined direction. For example, Patent Literature 1 describes a linear vibration motor provided with permanent magnets and coils as such a linear actuator.

JP 2020-22349 A

In the linear actuator as described above, for example, a configuration in which a coil is provided on the mover is conceivable. However, in this case, if the wiring member that supplies electric power to the coil is arranged while avoiding the wiring member from interfering with the mover, the size of the case that accommodates the mover and the wiring member inside becomes large. It is conceivable that the size of the entire linear actuator will be increased.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a linear actuator having a structure in which a coil can be provided on a mover while suppressing an increase in size.

One aspect of the linear actuator of the present invention is a mover having a mover main body and a coil attached to the mover main body, capable of moving in a predetermined first direction, and a second mover perpendicular to the first direction. a magnet disposed facing the coil in a direction, a coil spring that elastically deforms as the mover moves in the first direction and applies a force in the first direction to the mover, the mover; A case that accommodates the magnet and the coil spring therein, and a first wiring member that is at least partially positioned outside the case. The first wiring member is electrically connected to the coil through the coil spring.

ADVANTAGE OF THE INVENTION According to one aspect of this invention, a coil can be provided in the mover in a linear actuator, suppressing the linear actuator from becoming large.

FIG. 1 is a perspective view showing the linear actuator of the first embodiment. FIG. FIG. 2 is a cross-sectional view of the linear actuator of the first embodiment viewed from above. 3 is a cross-sectional view showing the linear actuator of the first embodiment, taken along line III--III in FIG. 2. FIG. 4 is a cross-sectional view showing a part of the linear actuator of the first embodiment, taken along line IV-IV in FIG. 2. FIG. FIG. 5 is a cross-sectional view showing part of a linear actuator in a modification of the first embodiment. FIG. 6 is a cross-sectional view of the linear actuator of the second embodiment as viewed from above. FIG. 7 is a cross-sectional view showing part of the linear actuator of the second embodiment, taken along line VII-VII in FIG.

Each figure shows an X-axis, a Y-axis orthogonal to the X-axis, and a Z-axis orthogonal to the X-axis and the Y-axis. In the following description, the direction parallel to the Z-axis is called "vertical direction Z", the direction parallel to the Y-axis is called "front-back direction Y", and the direction parallel to the X-axis is called "left-right direction X". . The up-down direction Z, the front-rear direction Y, and the left-right direction X are directions orthogonal to each other.

In the vertical direction Z, the positive side (+Z side) where the Z-axis arrow points is called the "upper side", and the negative side (-Z side) opposite to the side where the Z-axis arrow points is called the "lower side". call. In the front-rear direction Y, the positive side (+Y side) to which the Y-axis arrow points is called the "front side", and the negative side (-Y side) opposite to the side to which the Y-axis arrow points is the "rear side." call. In the horizontal direction X, the positive side (+X side) where the X-axis arrow points is called the "right side", and the negative side (-X side) opposite to the side where the X-axis arrow points is called the "left side". call.

In the following embodiments, the horizontal direction X corresponds to the "first direction" and the vertical direction Z corresponds to the "second direction". The right side (+X side) corresponds to "one side in the first direction".

Note that the vertical direction Z, the front-rear direction Y, the horizontal direction X, the upper side, the lower side, the front side, the rear side, the right side, and the left side are simply names for explaining the arrangement relationship of each part, and the actual arrangement. The relationship may be a layout relationship other than those indicated by these names. Further, in this specification, the term "parallel direction" includes substantially parallel directions, and the term "perpendicular direction" includes substantially perpendicular directions.

<First Embodiment>
The linear actuator 10 of this embodiment shown in FIG. 1 is a linear resonant actuator (LRA). The linear actuator 10 is mounted, for example, on an electronic device such as a smart phone. As shown in FIG. 1, the linear actuator 10 includes a case 20, a first wiring member 60, and a second wiring member . As shown in FIGS. 2 and 3, the linear actuator 10 includes a mover 30, a coil spring 50, and a damper member 80. As shown in FIGS. As shown in FIG. 3 , the linear actuator 10 has a magnet 40 .

As shown in FIG. 1, the case 20 has a substantially rectangular parallelepiped box shape that is flat in the vertical direction Z and elongated in the horizontal direction X. As shown in FIG. As shown in FIGS. 2 and 3, case 20 accommodates mover 30, magnet 40, coil spring 50, part of first wiring member 60, second wiring member 70, and damper member 80 therein. there is In this embodiment, the material of case 20 is a magnetic material. As shown in FIG. 1, the case 20 is constructed by fixing a first case member 21 and a second case member 22 to each other in the vertical direction Z. As shown in FIG.

The first case member 21 is positioned below the second case member 22 . The first case member 21 has a bottom wall portion 21a and a pair of side wall portions 21b and 21c. The bottom wall portion 21a has a rectangular plate shape whose plate surface faces the up-down direction Z and is elongated in the left-right direction X. As shown in FIG. The side wall portion 21b protrudes upward from the edge portion on the front side (+Y side) of the bottom wall portion 21a. The side wall portion 21c protrudes upward from the rear (−Y side) edge portion of the bottom wall portion 21a. The side wall portions 21b and 21c have a plate shape with a plate surface facing the front-rear direction Y. As shown in FIG. The side wall portions 21b and 21c extend in the left-right direction X. As shown in FIG.

The second case member 22 is positioned above the first case member 21 . The second case member 22 has a top wall portion 22a, a pair of side wall portions 22b and 22c, and a pair of guide portions 23a and 23b. The top wall portion 22a has a rectangular plate shape with a plate surface facing the up-down direction Z and elongated in the left-right direction X. As shown in FIG. The ceiling wall portion 22a and the bottom wall portion 21a almost entirely overlap each other when viewed in the vertical direction Z. As shown in FIG. Both edges of the top wall portion 22a in the front-rear direction Y are in contact with the upper end portions of the pair of side wall portions 21b and 21c.

The side wall portion 22b protrudes downward from the edge portion on the right side (+X side) of the top wall portion 22a. The side wall portion 22c protrudes downward from the left (−X side) edge of the top wall portion 22a. The side wall portions 22b and 22c are plate-shaped with their plate surfaces facing in the left-right direction X. As shown in FIG. The side wall portions 22b and 22c extend in the front-rear direction Y. As shown in FIG. The side wall portion 22b is in contact with the right end portion of the bottom wall portion 21a and the right end portions of the pair of side wall portions 21b and 21c. The side wall portion 22c is in contact with the left end portion of the bottom wall portion 21a and the left end portions of the pair of side wall portions 21b and 21c.

The pair of guide portions 23a and 23b are provided on both edge portions in the front-rear direction Y of the ceiling wall portion 22a. The guide portion 23a is provided at the center portion in the left-right direction X of the edge portion on the front side (+Y side) of the top wall portion 22a. The guide portion 23b is provided at the central portion in the left-right direction X of the rear (−Y side) edge portion of the top wall portion 22a. The guide portions 23a and 23b extend in the left-right direction X. As shown in FIG. The guide portions 23a and 23b guide the movement of the mover 30 in the left-right direction X. As shown in FIG.

In the present embodiment, insulating treatment is applied to portions of the inner surface of the case 20 that face a first coil spring 51 and a second coil spring 52, which will be described later. Specifically, the portion of the upper surface of the bottom wall portion 21a located below the first coil spring 51 and the second coil spring 52 and the rear (−Y side) surface of the side wall portion 21b The portion located on the front side (+Y side) of the first coil spring 51, the portion located on the rear side of the second coil spring 52 in the front side surface of the side wall portion 21b, and the surface on the lower side of the ceiling wall portion 22a. Insulation is applied to the portion positioned above the first coil spring 51 and the second coil spring 52 among them. A portion of the inner surface of the case 20 that faces the first coil spring 51 and the second coil spring 52 is insulated by being plated with an insulating material, for example.

As shown in FIG. 2, the mover 30 extends in the left-right direction X in this embodiment. The mover 30 is movable in the left-right direction X within the case 20 . The mover 30 has a mover body 31 and a coil 32 . In this embodiment, the mover 30 vibrates in the left-right direction X due to the electromagnetic force generated between the coil 32 and the magnet 40 when power is supplied to the coil 32 and the elastic force applied from the coil spring 50. . The mover main body 31 extends in the left-right direction X. As shown in FIG. The mover main body 31 has a base portion 31a and projecting portions 31b and 31c. The base 31a is a portion where the coil 32 is held. The base portion 31a has a substantially rectangular parallelepiped shape that is flat in the vertical direction Z and extends in the horizontal direction X. As shown in FIG.

The base portion 31a has a concave portion 31d recessed downward from the upper surface of the base portion 31a. The inner edge of the recess 31d has a rectangular shape when viewed from above. As shown in FIG. 3, the base 31a has a concave portion 31g recessed upward from the lower surface of the base 31a. The inner edge of the recess 31g has a rectangular shape when viewed from below. The recessed portion 31d and the recessed portion 31g are provided at positions overlapping each other when viewed in the up-down direction Z. As shown in FIG. The base portion 31a has a through hole 31e penetrating in the vertical direction Z through the base portion 31a. The through hole 31e penetrates from the bottom surface of the recess 31d to the bottom surface of the recess 31g. As shown in FIG. 2, the through hole 31e is a substantially circular hole. A coil 32 is fitted and held inside the through hole 31e. Thereby, the coil 32 is attached to the mover main body 31 . The base portion 31a is movably supported in the left-right direction X by the guide portions 23a and 23b.

The protrusion 31b protrudes to the right (+X side) from the base 31a. The protruding portion 31c protrudes leftward (−X side) from the base portion 31a. The protrusions 31b and 31c are, for example, substantially rectangular parallelepipeds. The dimension of the protrusions 31b and 31c in the front-rear direction Y is smaller than the dimension in the front-rear direction Y of the base 31a. In this embodiment, the projecting portions 31b and 31c are provided at the central portion in the front-rear direction Y of the base portion 31a. Both ends of the protruding portions 31b and 31c in the front-rear direction Y are located apart from both ends in the front-rear direction Y of the base portion 31a.

The coil 32 is configured by winding a conductive wire around a central axis J extending in the vertical direction Z. As shown in FIG. The central axis J is an imaginary axis shown in the drawings as appropriate. For example, in a state where the mover 30 is stationary, the center axis J passes through the center of the case 20 in the left-right direction X and the center in the front-rear direction Y of the case 20 . The coil 32 has a substantially annular shape centered on the central axis J when viewed in the vertical direction Z. As shown in FIG. The coil 32 is fixed to the mover main body 31 by being fitted in the through hole 31e. As shown in FIG. 3, the upper end of the coil 32 protrudes upward from the through hole 31e, for example. The lower end of the coil 32 is located at the same position in the up-down direction Z as the lower end of the through hole 31e, for example. In this embodiment, the coil 32 is supplied with power from outside the linear actuator 10 via the first wiring member 60 , the coil spring 50 , and the second wiring member 70 .

The magnet 40 is arranged inside the case 20 so as to face the coil 32 in the up-down direction Z perpendicular to the left-right direction X. As shown in FIG. A gap is provided between the magnet 40 and the coil 32 in the vertical direction Z. As shown in FIG. The magnet 40 has, for example, a rectangular plate shape whose plate surface faces the up-down direction Z and is long in the front-rear direction Y. As shown in FIG. Magnet 40 includes a first magnet 41 , a second magnet 42 , a third magnet 43 and a fourth magnet 44 .

The first magnet 41 and the second magnet 42 are positioned above the coil 32 . The first magnet 41 and the second magnet 42 are fixed to the inner wall surface of the top wall portion 22a. The first magnet 41 and the second magnet 42 are arranged side by side in the left-right direction X. As shown in FIG. The second magnet 42 is located on the left side (−X side) of the first magnet 41 . The first magnet 41 and the second magnet 42 are in contact with each other in the horizontal direction X. As shown in FIG. For example, when the mover 30 is stationary, the center axis J passes between the first magnet 41 and the second magnet 42 in the horizontal direction X. As shown in FIG.

The third magnet 43 and the fourth magnet 44 are positioned below the coil 32 . The third magnet 43 and the fourth magnet 44 are fixed to the inner wall surface of the bottom wall portion 21a. The third magnet 43 and the fourth magnet 44 are arranged side by side in the left-right direction X. As shown in FIG. The fourth magnet 44 is positioned on the left side (−X side) of the third magnet 43 . The third magnet 43 and the fourth magnet 44 are in contact with each other in the horizontal direction X. As shown in FIG. For example, when the mover 30 is stationary, the center axis J passes between the third magnet 43 and the fourth magnet 44 in the horizontal direction X. As shown in FIG.

The first magnet 41 and the third magnet 43 are arranged with the coil 32 interposed therebetween in the vertical direction Z. As shown in FIG. The first magnet 41 and the third magnet 43 are arranged so as to overlap each other when viewed in the vertical direction Z. As shown in FIG. The second magnet 42 and the fourth magnet 44 are arranged to sandwich the coil 32 in the vertical direction Z. As shown in FIG. The second magnet 42 and the fourth magnet 44 are arranged so as to overlap each other when viewed in the vertical direction Z. As shown in FIG.

Each magnet 40 has a magnetic pole along the up-down direction Z. As shown in FIG. The first magnet 41 has a magnetic pole 41N, which is an N pole, on the upper side. The first magnet 41 has a magnetic pole 41S, which is an S pole, on its lower side. The second magnet 42 has a magnetic pole 42S, which is an S pole, on the upper side. The second magnet 42 has a magnetic pole 42N, which is an N pole, on its lower side. The third magnet 43 has a magnetic pole 43N that is an N pole on its upper side. The third magnet 43 has a magnetic pole 43S, which is an S pole, on its lower side. The fourth magnet 44 has a magnetic pole 44S, which is an S pole, on its upper side. The fourth magnet 44 has a magnetic pole 44N, which is an N pole, on its lower side.

The first magnet 41 and the second magnet 42 arranged adjacent to each other in the horizontal direction X have their N poles and S poles arranged opposite to each other in the vertical direction Z. As shown in FIG. The third magnet 43 and the fourth magnet 44, which are arranged adjacent to each other in the horizontal direction X, have their N poles and S poles arranged opposite to each other in the vertical direction Z. As shown in FIG. The first magnet 41 and the third magnet 43 arranged with the coil 32 interposed therebetween in the vertical direction Z have the same arrangement of N poles and S poles along the vertical direction Z. As shown in FIG. The second magnet 42 and the fourth magnet 44 arranged with the coil 32 interposed therebetween in the vertical direction Z have the same arrangement of N poles and S poles along the vertical direction Z. As shown in FIG.

The coil spring 50 is a member that elastically deforms as the mover 30 moves in the left-right direction X and applies force in the left-right direction X to the mover 30 . As shown in FIG. 2, the coil spring 50 extends in the left-right direction X in this embodiment. The coil spring 50 includes a first coil spring 51, a second coil spring 52, a third coil spring 53, and a fourth coil spring .

The first coil spring 51 and the second coil spring 52 are positioned on the right side (+X side) of the mover 30 . In this embodiment, the first coil spring 51 and the second coil spring 52 are positioned between the mover 30 and the side wall portion 22b in the horizontal direction X. As shown in FIG. The 1st coil spring 51 and the 2nd coil spring 52 are arranged on both sides of projection part 31b in the direction Y of order. The first coil spring 51 is located on the front side (+Y side) of the projecting portion 31b. The second coil spring 52 is located on the rear side (-Y side) of the projecting portion 31b. The right end portion of the first coil spring 51 is in contact with a later-described connected portion 61 a fixed to the inner wall surface of the side wall portion 22 b of the case 20 . The right end portion of the second coil spring 52 is in contact with a later-described connected portion 61b fixed to the inner wall surface of the side wall portion 22b of the case 20 . The left (−X side) end of the first coil spring 51 and the left end of the second coil spring 52 are in contact with the base portion 31 a of the mover main body 31 .

Thus, in the present embodiment, the first coil spring 51 and the second coil spring 52 are arranged between the base portion 31a and the case 20 in the left-right direction X, and the projecting portion 31b is perpendicular to the left-right direction X. It corresponds to a pair of coil springs 50 sandwiched in the front-rear direction Y. A pair of the first coil spring 51 and the second coil spring 52 are positioned on the right side (+X side) of the mover main body 31 . In this embodiment, the surface of the first coil spring 51 and the surface of the second coil spring 52 are insulated. The surface of the first coil spring 51 and the surface of the second coil spring 52 are insulated by being plated with an insulating material, for example.

The third coil spring 53 and the fourth coil spring 54 are positioned on the left side (−X side) of the mover 30 . The third coil spring 53 and the fourth coil spring 54 are positioned between the mover 30 and the side wall portion 22c in the horizontal direction X. As shown in FIG. The third coil spring 53 and the fourth coil spring 54 are arranged to sandwich the projecting portion 31c in the front-rear direction Y. As shown in FIG. The third coil spring 53 is located on the front side (+Y side) of the projecting portion 31c. The fourth coil spring 54 is positioned on the rear side (-Y side) of the projecting portion 31c. The left end portion of the third coil spring 53 and the left end portion of the fourth coil spring 54 are in contact with the side wall portion 22c of the case 20 . The right (+X side) end of the third coil spring 53 and the right end of the fourth coil spring 54 are in contact with the base 31 a of the mover main body 31 .

The first coil spring 51 and the third coil spring 53 are arranged to sandwich in the left-right direction X a portion of the base portion 31a that is located on the front side (+Y side) of the projecting portions 31b and 31c. The second coil spring 52 and the fourth coil spring 54 are arranged so as to sandwich in the left-right direction X a portion of the base portion 31a which is located on the rear side (-Y side) of the projecting portions 31b and 31c.

When the mover 30 moves to the right (+X side) of the position shown in each figure, the first coil spring 51 and the second coil spring 52 are compressed and elastically deformed in the horizontal direction X. As shown in FIG. As a result, the first coil spring 51 and the second coil spring 52 apply an elastic force to the movable element 30 in a direction to separate the movable element 30 from the side wall portion 22b, that is, to the left (toward the -X side).

On the other hand, when the mover 30 moves to the left (-X side) of the position shown in each figure, the third coil spring 53 and the fourth coil spring 54 are elastically deformed in the horizontal direction X. As shown in FIG. As a result, the third coil spring 53 and the fourth coil spring 54 apply an elastic force to the mover 30 in a direction to separate the mover 30 from the side wall portion 22c, that is, toward the right (toward the +X side).

The damper member 80 is fixed to the inner wall surface of the case 20 . The damper member 80 faces the mover main body 31 in the left-right direction X. As shown in FIG. The damper member 80 is a member that attenuates the kinetic energy of the colliding object. The damper member 80 is made of rubber, for example. The damper member 80 has a square shape when viewed in the horizontal direction X, for example. The damper member 80 in this embodiment includes a first damper member 81 and a second damper member 82 .

The first damper member 81 is fixed to the inner wall surface of the side wall portion 22b, that is, the left side (−X side) surface of the side wall portion 22b. In the present embodiment, the first damper member 81 is positioned at the central portion in the front-rear direction Y of the side wall portion 22b. The first damper member 81 is positioned on the right side (+X side) of the projecting portion 31b.

The second damper member 82 is fixed to the inner wall surface of the side wall portion 22c, that is, the right side (+X side) surface of the side wall portion 22c. In the present embodiment, the second damper member 82 is positioned at the central portion in the front-rear direction Y of the side wall portion 22c. The second damper member 82 is positioned on the left side (-X side) of the projecting portion 31c. The first damper member 81 and the second damper member 82 are arranged to sandwich the mover main body 31 in the horizontal direction X. As shown in FIG.

The first wiring member 60 is attached to the case 20 . At least part of the first wiring member 60 is positioned outside the case 20 . In this embodiment, the first wiring member 60 is pulled out from the inside of the case 20 to the outside of the case 20 . The first wiring member 60 is, for example, a flexible member. The first wiring member 60 is, for example, a flexible printed circuit board. In this embodiment, the first wiring member 60 is strip-shaped. The first wiring member 60 has a first spring connecting portion 61 and a first wiring member body portion 62 .

In this embodiment, the first spring connecting portion 61 is located inside the case 20 . The first spring connecting portion 61 is fixed to the inner surface of the case 20 . The first spring connecting portion 61 has a pair of connected portions 61a and 61b and a connecting portion 61c. The connecting portion 61c extends in the front-rear direction Y. As shown in FIG. The connecting portion 61c has a strip shape whose width direction is along the left-right direction X. As shown in FIG. The connecting portion 61c is fixed to the edge portion on the right side (+X side) of the upper surface of the bottom wall portion 21a by, for example, an adhesive. The connecting portion 61c extends from the rear side (-Y side) of the projecting portion 31b to the front side (+Y side) of the projecting portion 31b.

The connected portions 61a and 61b protrude upward from the edge portion on the right side (+X side) of the connecting portion 61c. The connected portions 61a and 61b are belt-shaped and extend in the front-rear direction Y in the width direction. The connected portion 61a protrudes upward from the front (+Y side) end of the right edge of the connecting portion 61c. The connected portion 61b protrudes upward from the rear (−Y side) end of the right edge of the connecting portion 61c. In this embodiment, the connected portions 61a and 61b are fixed to the inner surface of the side wall portion 22b, that is, the left side (−X side) surface of the side wall portion 22b, for example, with an adhesive.

The connected portion 61a is positioned between the first coil spring 51 and the side wall portion 22b in the left-right direction X. As shown in FIG. The right (+X side) end of the first coil spring 51 is in contact with the left (−X side) surface of the connected portion 61a. The right end of the first coil spring 51 is connected to the connected portion 61a by, for example, an adhesive.

The connected portion 61b is positioned between the second coil spring 52 and the side wall portion 22b in the left-right direction X. As shown in FIG. The right (+X side) end of the second coil spring 52 is in contact with the left (−X side) surface of the connected portion 61b. The right end of the second coil spring 52 is connected to the connected portion 61b by, for example, an adhesive. Thus, a pair of the first coil spring 51 and the second coil spring 52 are connected to the first spring connecting portion 61 via the connected portions 61a and 61b.

The first wiring member body portion 62 is connected to the first spring connection portion 61 . In the present embodiment, the first wiring member body portion 62 extends rightward (+X side) from the central portion of the first spring connection portion 61 in the front-rear direction Y. As shown in FIG. The width direction of the first wiring member main body portion 62 is in the shape of a strip extending along the front-rear direction Y. As shown in FIG. At least part of the first wiring member main body 62 is positioned outside the case 20 . As shown in FIG. 3, the first wiring member body portion 62 is drawn out of the case 20 through a through hole 22d provided in the lower end portion of the side wall portion 22b. In this embodiment, substantially the entire first wiring member main body 62 is located outside the case 20 . An external power source (not shown) is connected to the first wiring member body portion 62 .

As shown in FIG. 2, the first wiring member 60 has wirings 63a and 63b. In this embodiment, the wirings 63a and 63b are printed wirings. The wiring 63a extends from the connected portion 61a to the first wiring member main body portion 62 through the connecting portion 61c. The wiring 63b extends from the connected portion 61b to the first wiring member main body portion 62 through the connecting portion 61c. A portion of the wiring 63 a provided in the connected portion 61 a is electrically connected to the right (+X side) end of the first coil spring 51 . A portion of the wiring 63 b provided in the connected portion 61 b is electrically connected to the right end portion of the second coil spring 52 .

The second wiring member 70 is attached to the mover main body 31 . In this embodiment, the second wiring member 70 is arranged above the base portion 31a. The second wiring member 70 is, for example, a flexible member. The second wiring member 70 is, for example, a flexible printed circuit board. In this embodiment, the second wiring member 70 is strip-shaped. The second wiring member 70 has a coil connection portion 71 and a pair of second spring connection portions 72a and 72b.

The coil connection portion 71 extends in the front-rear direction Y. As shown in FIG. The coil connection portion 71 has a strip shape whose width direction is along the left-right direction X. As shown in FIG. The coil connection portion 71 is fixed to a portion of the bottom surface of the recess 31d located on the right side (+X side) of the coil 32 by, for example, an adhesive. The front (+Y side) end of the coil connection portion 71 is arranged on the upper surface of the portion of the base portion 31a located on the front side of the recess 31d. The rear (-Y side) end of the coil connection portion 71 is arranged on the upper surface of the portion of the base portion 31a located on the rear side of the recess 31d. A pair of coil lead wires 32a and 32b drawn out from the coil 32 to the right side (+X side) are connected to the upper surface of the coil connection portion 71 by, for example, an adhesive.

In this embodiment, the pair of second spring connection portions 72a and 72b extends from the coil connection portion 71 to the right (+X side). The second spring connecting portion 72 a extends rightward from the front (+Y side) end of the coil connecting portion 71 . The second spring connection portion 72a is positioned forward of the projecting portion 31b. The second spring connecting portion 72b extends rightward from the rear (-Y side) end of the coil connecting portion 71. As shown in FIG. The second spring connection portion 72b is located on the rear side of the projecting portion 31b. The second spring connecting portions 72a and 72b are strip-shaped with the width direction along the front-rear direction Y. As shown in FIG.

The second spring connecting portion 72a has an arm portion 72c and a connected portion 72d. The arm portion 72c is a portion extending from the coil connection portion 71 to the right side (+X side). As shown in FIG. 4, the connected portion 72d is a portion protruding downward from the right end of the arm portion 72c. The connected portion 72 d is positioned on the lateral side of the mover main body 31 in the left-right direction X. As shown in FIG. More specifically, the connected portion 72d is located on the right side surface 31j of the portion of the base portion 31a located on the front side (+Y side) of the projecting portion 31b. The connected portion 72d is fixed to the side surface 31j by, for example, an adhesive.

The connected portion 72d is positioned between the first coil spring 51 and the base portion 31a in the left-right direction X. As shown in FIG. The left (−X side) end of the first coil spring 51 is in contact with the right (+X side) surface of the connected portion 72d. The left end of the first coil spring 51 is connected to the connected portion 72d by, for example, an adhesive.

As shown in FIG. 2, the second spring connecting portion 72b has an arm portion 72e and a connected portion 72f. The arm portion 72e is a portion extending from the coil connection portion 71 to the right side (+X side). Although not shown, the connected portion 72f is a portion protruding downward from the right end of the arm portion 72e. The connected portion 72f is positioned on the lateral side of the mover main body 31 in the left-right direction X. As shown in FIG. More specifically, the connected portion 72f is located on the right side of the portion of the base portion 31a located on the rear side (-Y side) of the projecting portion 31b. The connected portion 72f is fixed to the side surface by, for example, an adhesive.

The connected portion 72f is positioned between the second coil spring 52 and the base portion 31a in the left-right direction X. As shown in FIG. The left (−X side) end of the second coil spring 52 is in contact with the right (+X side) surface of the connected portion 72f. The left end of the second coil spring 52 is connected to the connected portion 72f by, for example, an adhesive.

The second wiring member 70 has wirings 73a and 73b. In this embodiment, the wirings 73a and 73b are printed wirings. The wiring 73a extends from the connected portion 72d to the coil connection portion 71 through the arm portion 72c. The wiring 73b extends from the connected portion 72f to the coil connection portion 71 through the arm portion 72e. A portion of the wiring 73a provided in the coil connecting portion 71 is electrically connected to the coil lead-out line 32a. A portion of the wiring 73b provided in the coil connecting portion 71 is electrically connected to the coil lead-out line 32b. That is, the coil lead-out line 32a and the coil lead-out line 32b are electrically connected to different wirings 73a and 73b provided on the second wiring member 70, respectively. Thereby, the coil 32 and the second wiring member 70 are electrically connected.

A portion of the wiring 73 a provided in the connected portion 72 d is electrically connected to the left (−X side) end of the first coil spring 51 . Thereby, the first wiring member 60 and the second wiring member 70 are electrically connected by the first coil spring 51 . A portion of the wiring 73 b provided in the connected portion 72 f is electrically connected to the left end portion of the second coil spring 52 . Thereby, the first wiring member 60 and the second wiring member 70 are electrically connected by the second coil spring 52 .

In this embodiment, power supplied from an external power supply (not shown) connected to the first wiring member 60 is supplied to the coil 32 via the first wiring member 60, the coil spring 50, and the second wiring member 70. be. For example, when a current is supplied to the coil 32 in a direction from the coil lead wire 32a to the coil lead wire 32b through the coil 32, the current supplied from an external power source (not shown) is the wiring 63a of the first wiring member 60, the It is supplied to the coil 32 through the first coil spring 51, the wiring 73a of the second wiring member 70, and the coil lead wire 32a in this order. The current flowing through the coil 32 flows from the coil lead-out line 32b through the wiring 73b of the second wiring member 70, the second coil spring 52, and the wiring 63b of the first wiring member 60 in this order, and returns to the external power supply (not shown). . When the current is supplied to the coil 32 in the direction of flowing from the coil lead wire 32b through the coil 32 to the coil lead wire 32a, the current flows through each part in the direction opposite to the direction of current flow described above.

According to this embodiment, the first wiring member 60 is electrically connected to the coil 32 via the coil spring 50 . Therefore, the coil spring 50 that applies an elastic force to the mover 30 can be used as an energization path. It is possible to suppress the complication of handling of the wiring member in. As a result, the space for routing wiring members in the case 20 can be reduced, and the increase in size of the case 20 can be suppressed. Therefore, the coil 32 can be provided in the mover 30 in the linear actuator 10 while suppressing the linear actuator 10 from increasing in size.

In addition, by using the space for routing wiring members in the case 20 as a space for arranging the mover 30, the mover 30 can be enlarged without increasing the size of the case 20. - 特許庁Therefore, the mass of the mover 30 can be increased, and the kinetic energy when the mover 30 vibrates in the horizontal direction X can be increased. As a result, the linear actuator 10 can appropriately vibrate the equipment on which the linear actuator 10 is mounted, while suppressing the linear actuator 10 from increasing in size.

Further, according to the present embodiment, the coil springs 50 are the first coil spring 51 and the second coil spring 50 as a pair of coil springs 50 to which the pair of coil lead wires 32a and 32b drawn out from the coil 32 are electrically connected. A coil spring 52 is included. Therefore, by using the first coil spring 51 and the second coil spring 52, a circuit in which current flows between the external power source (not shown) and the coil 32 can be easily configured. Specifically, in the present embodiment, the current supplied from the external power supply to the coil 32 by the first coil spring 51, the second coil spring 52, the wirings 63a, 63b, 73a, 73b, the coil 32, and an external power supply (not shown) is A flowing circuit is formed.

Further, according to the present embodiment, the first wiring member 60 is connected to the first spring connection portion 61 to which the pair of the first coil spring 51 and the second coil spring 52 are connected, and the first spring connection portion 61. and a first wiring member main body 62 at least part of which is located outside the case 20 . Therefore, the wirings 63 a and 63 b connected to the pair of first coil springs 51 and second coil springs 52 can be put together in the first wiring member main body 62 and drawn out of the case 20 . Thus, by connecting the first wiring member main body 62 to an external power source (not shown), the linear actuator 10 can be easily connected to the external power source.

Moreover, according to the present embodiment, the first spring connecting portion 61 is located inside the case 20 . Therefore, the connection points between the first coil spring 51 and the second coil spring 52 and the first wiring member 60 can be arranged inside the case 20 . This eliminates the need to arrange a portion of the first coil spring 51 and a portion of the second coil spring 52 outside the case 20 and connect them to the first wiring member 60 . Therefore, compared to the case 20 having a hole through which part of the first coil spring 51 and part of the second coil spring 52 pass, the connection structure between the first coil spring 51 and the second coil spring 52 is reduced. Easy to simplify.

Further, according to the present embodiment, the second wiring member 70 has a pair of second spring connecting portions 72a, 72b connected to the pair of first coil springs 51 and second coil springs 52, respectively. The pair of first coil spring 51 and the second coil spring 52 are electrically connected to the pair of coil lead wires 32a and 32b through the second wiring member 70, respectively. Therefore, compared to the case where the coil lead wires 32a and 32b are extended to the first coil spring 51 and the second coil spring 52, respectively, the coil lead wires 32a and 32b are extended to the first coil spring 51 and the second coil spring 52, respectively. Easy to connect electrically.

Further, according to the present embodiment, the pair of second spring connection portions 72a and 72b have connected portions 72d and 72f to which the coil springs 50 are connected. The connected portions 72 d and 72 f are positioned on the lateral side of the movable element body 31 in the lateral direction X and sandwiched between the coil spring 50 and the movable element body 31 in the lateral direction X. As shown in FIG. Therefore, for example, without pulling out one end of the first coil spring 51 and one end of the second coil spring 52 to the upper side of the mover main body 31, the first coil spring 51 and the second coil spring 52 are connected to the second spring connecting portions 72a and 72a, respectively. 72b. That is, the first coil spring 51 and the second coil spring 52 can be easily connected to the second wiring member 70 without making the shape of the first coil spring 51 and the shape of the second coil spring 52 into special shapes. In addition, since the first coil spring 51 and the second coil spring 52 can be pressed against the connected portions 72d and 72f by elastic force, the first coil spring 51 and the second coil spring 52 can be stably connected to the second wiring member. 70 can be connected.

Further, according to the present embodiment, the pair of first coil spring 51 and second coil spring 52 are positioned on one side (right side) of the mover main body 31 in the left-right direction X. As shown in FIG. That is, the pair of first coil spring 51 and second coil spring 52 are arranged on the same side in the left-right direction X with respect to the mover main body 31 . Therefore, compared to the case where the first coil spring 51 and the second coil spring 52 are arranged at positions sandwiching the mover main body 31 in the left-right direction X, the coil 32 is arranged as a pair of the first coil spring 51 and the second coil spring. Easy to connect to 52.

Further, according to the present embodiment, the pair of first coil spring 51 and second coil spring 52 are arranged between the base portion 31a and the case 20 in the left-right direction X, and the projecting portion 31b extends in the left-right direction X. They are arranged to be sandwiched in the front-rear direction Y orthogonal to each other. Therefore, the projecting portion 31b can be provided while the first coil spring 51 and the second coil spring 52 are arranged on the same side in the left-right direction X with respect to the mover main body 31 . The mass of the mover main body 31 can be increased by the amount of the projecting portion 31b provided. Therefore, the kinetic energy when the mover 30 vibrates in the horizontal direction X can be increased. Therefore, the linear actuator 10 can suitably vibrate the device on which the linear actuator 10 is mounted.

Further, according to the present embodiment, the surface of the coil spring 50 electrically connected to the coil 32, that is, the surface of the first coil spring 51 and the surface of the second coil spring 52 are subjected to insulation treatment. . Therefore, even if at least one of the first coil spring 51 and the second coil spring 52 is in contact with the inner surface of the case 20 , the first coil spring 51 and the second coil spring 52 are connected to the coil 32 as an energization path. It is possible to suppress short-circuiting of a circuit that is a part of.

Further, according to the present embodiment, of the inner surface of the case 20, the portion facing the coil spring 50 electrically connected to the coil 32, that is, the portion facing the first coil spring 51 and the second coil spring 52 are insulated. Therefore, even if at least one of the first coil spring 51 and the second coil spring 52 contacts the inner surface of the case 20 , the first coil spring 51 and the second coil spring 52 are connected to the coil 32 as an energization path. It is possible to further suppress short-circuiting of a circuit that is a part of.

(Modified example of the first embodiment)
As shown in FIG. 5 , in the linear actuator 110 of this modified example, the left end of the wire constituting the first coil spring 151 is a lead portion 151 a that is led out to the upper side of the mover main body 31 . The lead-out portion 151 a is electrically connected to a second spring connection portion 172 a of the second wiring member 170 located on the upper surface of the mover main body 31 . The lead-out portion 151a and the second spring connecting portion 172a are connected to each other by soldering, resistance welding, or the like. In this modification, the second spring connection portion 172a of the second wiring member 170 does not have a portion sandwiched between the first coil spring 151 and the mover main body 31 in the horizontal direction X. As shown in FIG.

According to such a configuration, for example, the left side (−X side) end of the body portion of the first coil spring 151 of the mover body 31 is fitted inside the first coil spring 151 . Protrusions can be provided. Thereby, it is possible to prevent the first coil spring 151 from shifting with respect to the mover main body 31 . Although illustration is omitted, the connection structure between the second coil spring and the second wiring member 170 in this modified example can be made in the same manner as the connection structure between the first coil spring 151 and the second wiring member 170 . Other configurations of the linear actuator 110 can be similar to other configurations of the linear actuator 10 described above.

<Second embodiment>
As shown in FIG. 6, the linear actuator 210 of this embodiment does not have the second wiring members 70 and 170 unlike the first embodiment. The coil lead wire 232a extends to the left (−X side) end of the first coil spring 251 disposed between the base 31a and the case 220 in the left-right direction X. As shown in FIG. The coil lead wire 232a is connected to the left end of the first coil spring 251 by soldering, resistance welding, or the like. The coil lead wire 232b extends to the left end of the second coil spring 252 arranged between the base 31a and the case 220 in the left-right direction X. As shown in FIG. The coil lead wire 232b is connected to the left end of the second coil spring 252 by soldering, resistance welding, or the like. Thus, in this embodiment, the pair of coil lead wires 232a and 232b are directly connected to the pair of first coil spring 251 and second coil spring 252, respectively. Therefore, it is not necessary to provide the second wiring members 70 and 170 as in the first embodiment, and the number of parts of the linear actuator 210 can be reduced.

In this embodiment, the side wall portion 222b located on the right side (+X side) of the case 220 has through holes 222e and 222f penetrating the side wall portion 222b in the left-right direction X. As shown in FIG. In the present embodiment, the right end of the wire constituting the first coil spring 251 is a lead-out portion 251b that protrudes to the outside of the case 220 through the through hole 222e. In the present embodiment, the right end of the wire that constitutes the second coil spring 252 is a lead portion 252b that protrudes to the outside of the case 220 through the through hole 222f.

As shown in FIG. 7, the lead-out portion 251b has a first portion 251c extending in the left-right direction X and passed through the through hole 222e, and a second portion 251d extending downward from the right end of the first portion 251c. , has The second portion 251 d is connected to the first spring connection portion 261 . Although not shown, the lead portion 252b also has a first portion that extends in the left-right direction X and is passed through the through hole 222f, and extends downward from the right end of the first portion, similarly to the lead portion 251b. and a second portion. The inner surfaces of the through holes 222e and 222f are, for example, subjected to insulation treatment. The inner surfaces of the through holes 222e and 222f are insulated by being plated with an insulating material, for example.

In this embodiment, the first spring connecting portion 261 of the first wiring member 260 is positioned outside the case 220 . The first spring connection portion 261 is fixed to the outer surface of the side wall portion 222b, that is, the right side (+X side) surface with an adhesive or the like. The first spring connection portion 261 is fixed to a portion of the outer surface of the side wall portion 222b located below the through holes 222e and 222f. As shown in FIG. 6, the first spring connecting portion 261 extends in the front-rear direction Y. As shown in FIG. The first spring connecting portion 261 has a belt shape whose width direction is along the vertical direction Z. As shown in FIG.

The first spring connecting portion 261 is connected to the lead portion 251 b of the first coil spring 251 and the lead portion 252 b of the second coil spring 252 . That is, part of the pair of first coil springs 251 and part of the second coil spring 252 protrude outside the case 220 and are connected to the first spring connecting portion 261 . With such a structure, the entire first wiring member 260 can be arranged outside the case 220 . Therefore, it is not necessary to provide a space for arranging the first wiring member 260 inside the case 220, and the case 220 can be made more compact. The lead portions 251b and 252b are electrically connected to the first spring connection portion 261 by soldering, resistance welding, or the like, for example.

In the present embodiment, the first wiring member body portion 262 extends rightward (+X side) from the central portion of the first spring connection portion 261 located outside the case 220 in the front-rear direction Y. As shown in FIG. Other configurations of the linear actuator 210 of this embodiment can be the same as other configurations of the linear actuators 10 and 110 of the first embodiment.

The present invention is not limited to the above-described embodiments, and other configurations and methods can be adopted within the scope of the technical idea of the present invention. As long as the first wiring member is electrically connected to the coil via the coil spring, the first wiring member, the coil spring, and the coil may be connected to each other in any way. When the second wiring member is provided, the second wiring member and the coil may be connected in any manner, and the second wiring member and the coil spring may be connected in any manner. A method of electrically connecting two portions of each wiring member, the coil spring, and the coil is not particularly limited.

A pair of coil springs, to which a pair of coil lead wires drawn out from the coil are electrically connected, may be arranged to sandwich the mover in the first direction (horizontal direction X). Any type of insulation treatment may be applied to the surface of the coil spring electrically connected to the coil. The surface of the coil spring electrically connected to the coil need not be insulated.

The first wiring member may be electrically connected to the coil via at least one coil spring. That is, for example, in the first embodiment described above, one of the first coil spring 51 and the second coil spring 52 does not have to be electrically connected to the coil 32 and the first wiring member 60 . In this case, a portion of the first wiring member 60 and a portion of the second wiring member 70 may be directly connected instead of the coil spring 50 that is not electrically connected.

The first wiring member and the second wiring member may be any wiring members as long as they are members that can be electrically wired. The shape of the first wiring member and the shape of the second wiring member are not particularly limited. The first wiring member and the second wiring member may not have flexibility.

The shape of the mover main body is not particularly limited. The number, shape and arrangement of magnets are not particularly limited. The damper member may be any type of damper member. A damper member may not be provided. The material of the case may be non-magnetic. The shape of the case is not particularly limited. Any type of insulation treatment may be applied to the portion of the inner surface of the case facing the coil spring electrically connected to the coil. A portion of the inner surface of the case facing the coil spring electrically connected to the coil need not be insulated.

Applications of the linear actuator to which the present invention is applied are not particularly limited. A linear actuator may be mounted on any device. The configurations and methods described above in this specification can be appropriately combined within a mutually consistent range.

DESCRIPTION OF SYMBOLS 10,110,210... Linear actuator, 20,220... Case, 30... Mover, 31... Mover main body, 31a... Base, 31b... Projection part, 31j... Side, 32... Coil, 32a, 32b, 232a, 232b Coil lead wire 40 Magnet 50 Coil spring 60, 260 First wiring member 61, 261 First spring connecting portion 72a, 72b, 172a Second spring connecting portion 72d, 72f Cover Connection portions 62, 262 First wiring member body portion 70, 170 Second wiring member 71 Coil connection portion X Horizontal direction (first direction) Z Vertical direction (second direction)

Claims (12)

a mover having a mover body and a coil attached to the mover body and capable of moving in a predetermined first direction;
a magnet arranged to face the coil in a second direction orthogonal to the first direction;
a coil spring that elastically deforms as the mover moves in the first direction and applies force to the mover in the first direction;
a case that accommodates the mover, the magnet, and the coil spring;
a first wiring member at least partially positioned outside the case;
with
A said 1st wiring member is a linear actuator electrically connected with the said coil through the said coil spring. 2. The linear actuator according to claim 1, wherein said coil spring includes a pair of coil springs electrically connected to a pair of coil lead wires drawn out from said coil. The first wiring member is
a first spring connecting portion to which the pair of coil springs are connected;
a first wiring member body portion connected to the first spring connection portion and at least a portion of which is positioned outside the case;
3. The linear actuator of claim 2, comprising: 4. The linear actuator according to claim 3, wherein said first spring connection is located inside said case. The first spring connection portion is located outside the case,
4. The linear actuator according to claim 3, wherein a part of said pair of coil springs protrudes outside said case and is connected to said first spring connecting portion. further comprising a second wiring member having a coil connection portion to which the pair of coil lead wires are connected;
The second wiring member has a pair of second spring connection portions respectively connected to the pair of coil springs,
The linear actuator according to any one of claims 2 to 5, wherein the pair of coil springs are electrically connected to the pair of coil lead wires via the second wiring members. The pair of second spring connection portions has a connected portion to which the coil spring is connected,
7. The linear actuator according to claim 6, wherein said connected portion is located on a side surface of said mover main body in said first direction, and is sandwiched between said coil spring and said mover main body in said first direction. The linear actuator according to any one of claims 2 to 5, wherein the pair of coil lead wires are directly connected to the pair of coil springs, respectively. The linear actuator according to any one of claims 2 to 8, wherein the pair of coil springs are positioned on one side of the mover main body in the first direction. The mover main body is
a base;
a protruding portion protruding from the base portion to one side in the first direction;
has
10. The pair of coil springs according to claim 9, wherein the pair of coil springs are arranged between the base portion and the case in the first direction, and are arranged so as to sandwich the projecting portion in a direction orthogonal to the first direction. Linear Actuator as described. The linear actuator according to any one of claims 1 to 10, wherein a surface of said coil spring electrically connected to said coil is subjected to an insulation treatment. The linear actuator according to any one of claims 1 to 11, wherein a portion of the inner surface of the case facing the coil spring electrically connected to the coil is insulated.

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