CN114583914B - Linear actuator - Google Patents

Abstract

The invention provides a linear actuator. The linear actuator has: a movable element that has a movable element main body and a coil attached to the movable element main body, and is movable in a predetermined first direction; a magnet disposed opposite to the coil in a second direction perpendicular to the first direction; an elastic member that elastically deforms in response to movement of the movable element in the first direction, and applies a force in the first direction to the movable element; and a wiring member having flexibility and electrically connected to the coil at one side of the movable element body in the second direction. The wiring member extends from one side of the second direction of the movable element body to the other side of the second direction of the movable element body through one side of the first direction of the movable element body, and is led out from the other side of the second direction of the movable element body to one side of the first direction than the movable element body.

Description

Linear actuator

Technical Field

The present invention relates to linear actuators.

Background

A linear actuator having a movable element movable in a predetermined direction is known. For example, patent document 1 describes a linear vibration motor having a permanent magnet and a coil as such a linear actuator.

Patent document 1: japanese patent laid-open No. 2020-22349

In the linear actuator described above, for example, a coil is provided in a movable element. However, in this case, if the wiring member for supplying electric power to the coil is to be arranged so as to avoid interference between the wiring member and the movable element, the linear actuator may be enlarged as a whole due to an increase in the size of a case in which the movable element and the wiring member are housed, for example.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a linear actuator having a structure in which a coil can be provided to a movable element while suppressing an increase in size.

One embodiment of the present invention is a linear actuator including: a movable element that has a movable element main body and a coil attached to the movable element main body, and is movable in a predetermined first direction; a magnet disposed opposite to the coil in a second direction perpendicular to the first direction; an elastic member that elastically deforms in response to movement of the movable element in the first direction, and applies a force in the first direction to the movable element; and a wiring member having flexibility, electrically connected to the coil at one side of the second direction of the movable element body, the wiring member extending from one side of the second direction of the movable element body to the other side of the second direction of the movable element body through one side of the first direction of the movable element body, and being led out from the other side of the second direction of the movable element body to one side of the first direction than the movable element body.

According to one aspect of the present invention, the coil can be provided to the movable element in the linear actuator while suppressing an increase in the size of the linear actuator.

Drawings

Fig. 1 is a perspective view showing a linear actuator of a first embodiment.

Fig. 2 is a cutaway perspective view showing the linear actuator of the first embodiment.

Fig. 3 is a sectional view showing the linear actuator of the first embodiment.

Fig. 4 is a cross-sectional perspective view showing the linear actuator of the first embodiment, and is a view showing a section IV-IV in fig. 1.

Fig. 5 is a sectional view showing the linear actuator of the first embodiment, and is a V-V sectional view in fig. 3.

Fig. 6 is a perspective view showing the movable element of the first embodiment.

Fig. 7 is a sectional view showing a linear actuator of the second embodiment.

Fig. 8 is a cutaway perspective view showing a linear actuator of the third embodiment.

Fig. 9 is an exploded perspective view showing a housing of the third embodiment.

Fig. 10 is a cross-sectional perspective view showing a part of a housing of the third embodiment.

Fig. 11 is a cutaway perspective view showing a linear actuator of the fourth embodiment.

Fig. 12 is a cross-sectional view showing a part of the linear actuator of the fifth embodiment.

Fig. 13 is a perspective view showing a part of the movable element main body and a wiring member of the sixth embodiment.

Fig. 14 is a perspective view showing a part of the movable element main body and a wiring member of the seventh embodiment.

Fig. 15 is a cross-sectional perspective view showing a linear actuator of the eighth embodiment.

Description of the reference numerals

10. 110, 210, 310, 410, 510, 610, 710: A linear actuator; 20. 120, 220, 320, 420, 720: a housing; 30. 130: a movable member; 31. 131: a movable member main body; 32: a coil; 40: a magnet; 50: an elastic member; 60. 560, 660, 760: a wiring member; 61: a coil connection part; 62. 562, 662: a first extension; 62a: a wide width portion; 63. 663: a first connection portion; 64: a second extension; 65: a second connecting portion; 66. 566, 766: a third extension; 70: a damping member; 567a: a fourth extension; 567b: a third connecting portion; 567c: a fifth extension; 567d: a fourth connecting portion; 661a: a first coil connection portion; 661b: a second coil connection part; 668: a sixth extension; 669: a fifth connecting portion; x: left-right direction (first direction); y: front-rear direction (third direction); z: up-down direction (second direction).

Detailed Description

The X-axis, the Y-axis perpendicular to the X-axis, and the Z-axis perpendicular to the X-axis and the Y-axis are shown in each figure. In the following description, a direction parallel to the Z axis is referred to as an "up-down direction Z", a direction parallel to the Y axis is referred to as a "front-back direction Y", and a direction parallel to the X axis is referred to as a "left-right direction X". The up-down direction Z, the front-back direction Y, and the left-right direction X are mutually perpendicular directions.

The positive side (+z side) toward which the arrow of the Z axis is directed in the up-down direction Z is referred to as "upper side", and the negative side (-Z side) which is the opposite side to the side toward which the arrow of the Z axis is directed is referred to as "lower side". The positive side (+y side) toward which the arrow of the Y axis is directed in the front-rear direction Y is referred to as "front side", and the negative side (-Y side) which is the opposite side to the side toward which the arrow of the Y axis is directed is referred to as "rear side". The positive side (+x side) toward which the arrow of the X axis is directed in the left-right direction X is referred to as "right side", and the negative side (-X side) which is the opposite side to the side toward which the arrow of the X axis is directed is referred to as "left side".

In the following embodiments, the left-right direction X corresponds to a "first direction", the up-down direction Z corresponds to a "second direction", and the front-back direction Y corresponds to a "third direction". The right side (+x side) corresponds to "one side in the first direction", the left side (-X side) corresponds to "the other side in the first direction", the upper side (+z side) corresponds to "one side in the second direction", and the lower side corresponds to "the other side in the second direction".

The vertical direction Z, the front-rear direction Y, and the left-right direction X, the upper side, the lower side, the front side, the rear side, the right side, and the left side are only names for explaining the arrangement relationships of the respective parts, and the actual arrangement relationships may be other than the arrangement relationships represented by these names. In the present specification, "parallel direction" also includes a substantially parallel direction, and "perpendicular direction" also includes a substantially perpendicular direction.

< First embodiment >, first embodiment

the linear actuator 10 of the present embodiment shown in fig. 1 is a linear resonant actuator (Linear Resonant Actuator: LRA). The linear actuator 10 is mounted on an electronic device such as a smart phone, for example. As shown in fig. 1, the linear actuator 10 has a housing 20 and a wiring member 60. As shown in fig. 2 and 3, the linear actuator 10 has a movable member 30, an elastic member 50, and a damping member 70. As shown in fig. 4 and 5, the linear actuator 10 has a magnet 40.

As shown in fig. 1, the case 20 has a rectangular parallelepiped box shape extending in the left-right direction X. In the present specification, the term "case having a rectangular parallelepiped box shape" includes a case where the case has a strictly rectangular parallelepiped box shape and a case where the case has a substantially rectangular parallelepiped box shape. In the present embodiment, the case 20 has a substantially rectangular parallelepiped box shape that is flat in the up-down direction Z and long in the left-right direction X. As shown in fig. 2 to 4, the housing 20 accommodates therein the movable element 30, the magnet 40, the elastic member 50, a part of the wiring member 60, and the damper member 70. In the present embodiment, the material of the case 20 is a magnetic material. As shown in fig. 4, the housing 20 is configured by fixing a first housing member 21 and a second housing member 22 to each other in the up-down direction Z.

The first housing part 21 is located on the underside of the second housing part 22. The first housing member 21 has a bottom wall portion 21a and a pair of side wall portions 21b, 21c. That is, the housing 20 has a bottom wall portion 21a and a pair of side wall portions 21b, 21c. The bottom wall portion 21a has a rectangular plate shape with a plate surface facing the up-down direction Z and long in the left-right direction X. An upper surface, which is an inner wall surface of the bottom wall portion 21a, is an opposing surface 26a opposing the movable element 30 in the up-down direction Z. As described above, in the present embodiment, the housing 20 has the facing surface 26a facing the movable element 30 in the up-down direction Z intersecting the left-right direction X. The side wall portion 21b protrudes upward from the edge portion of the front side (+y side) of the bottom wall portion 21 a. The side wall portion 21c protrudes upward from the edge portion of the rear side (-Y side) of the bottom wall portion 21 a. The side wall portions 21b, 21c are plate-like with the plate surface facing in the front-rear direction Y. The side wall portions 21b, 21c extend in the left-right direction X. In the present embodiment, the bottom wall portion 21a corresponds to a "first wall portion" disposed in the vertical direction Z perpendicular to the left-right direction X.

The side wall portion 21b has a guide portion 24a and a wall main body portion 21d. That is, the housing 20 has a guide portion 24a and a wall body portion 21d. The guide portion 24a protrudes upward and obliquely forward from the edge portion of the front side (+y side) of the bottom wall portion 21 a. The guide portion 24a extends in the left-right direction X. The guide portion 24a has a guide surface 24c. The guide surface 24c is a surface facing the inside of the housing 20, among the surfaces of the guide portion 24 a. The guide surface 24c extends in the left-right direction X. In the present embodiment, the guide surface 24c is directed rearward and obliquely upward. The wall body 21d protrudes directly above the upper end of the guide 24 a. The inner wall surface of the wall body 21d, i.e., the rear side (-Y side), is an opposing surface 26b opposing the movable element 30 in the front-rear direction Y. As described above, in the present embodiment, the case 20 has the facing surface 26b facing the movable element 30 in the front-rear direction Y intersecting the left-right direction X. In the present embodiment, the wall main body portion 21d is connected to the bottom wall portion 21a via the guide portion 24 a. The guide portion 24a is provided at a corner of the bottom wall portion 21a and the wall main body portion 21d. The guide portion 24a is located further inside (rear side) the housing 20 than the wall main body portion 21d.

The side wall portion 21c is provided symmetrically with the side wall portion 21b in the front-rear direction Y. The side wall portion 21c has a guide portion 24b and a wall main body portion 21e. That is, the housing 20 has the guide portion 24b and the wall body portion 21e. The guide portion 24b protrudes upward and obliquely rearward from a rim portion of the rear side (-Y side) of the bottom wall portion 21 a. That is, the guide portion 24a and the guide portion 24b protrude from the bottom wall portion 21a in directions away from each other in the front-rear direction Y as going toward the upper side. The guide portion 24b extends in the left-right direction X. The guide portion 24b has a guide surface 24d. The guide surface 24d is a surface facing the inside of the housing 20, among the surfaces of the guide portion 24 b. The guide surface 24d extends in the left-right direction X. In the present embodiment, the guide surface 24d is directed to the front side and is inclined upward. The wall body 21e protrudes directly above the upper end of the guide 24 b. The front side (+y side) surface, which is the inner wall surface of the wall body 21e, is an opposing surface 26c that opposes the movable element 30 in the front-rear direction Y. As described above, in the present embodiment, the case 20 has the facing surface 26c facing the movable element 30 in the front-rear direction Y intersecting the left-right direction X.

In the present embodiment, the wall main body portion 21e is connected to the bottom wall portion 21a via the guide portion 24 b. The guide portion 24b is provided at a corner of the bottom wall portion 21a and the wall main body portion 21 e. The guide portion 24b is located further inside (front side) the housing 20 than the wall main body portion 21 e. In the present embodiment, the pair of wall main portions 21d and 21e corresponds to a "pair of second wall portions" located on both sides in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z.

The second housing part 22 is located on the upper side of the first housing part 21. As shown in fig. 1, the second housing member 22 has a top wall portion 22a, a pair of side wall portions 22b, 22c, and a pair of guide portions 23a, 23b. The top wall 22a has a rectangular plate shape with a plate surface facing the up-down direction Z and long in the left-right direction X. The top wall portion 22a and the bottom wall portion 21a overlap with each other substantially as a whole when viewed in the up-down direction Z. Two edge portions in the front-rear direction Y of the top wall portion 22a are in contact with upper end portions of the pair of side wall portions 21b, 21 c. As shown in fig. 4, the inner wall surface of the top wall 22a, i.e., the lower surface, is an opposing surface 26d opposing the movable element 30 in the up-down direction Z. As described above, in the present embodiment, the housing 20 has the facing surface 26d facing the movable element 30 in the up-down direction Z intersecting the left-right direction X.

As shown in fig. 1, the side wall 22b protrudes downward from the right edge (+x side) of the top wall 22 a. The side wall portion 22c protrudes downward from the left (-X side) edge portion of the top wall portion 22 a. The side wall portions 22b, 22c are plate-like with the plate surface facing the left-right direction X. The side wall portions 22b, 22c extend in the front-rear direction Y. The side wall portion 22b contacts the right end of the bottom wall portion 21a and the right ends of the pair of side wall portions 21b, 21 c. The side wall portion 22c contacts the left end of the bottom wall portion 21a and the left ends of the pair of side wall portions 21b, 21 c.

The pair of guide portions 23a, 23b are provided at both edge portions of the top wall portion 22a in the front-rear direction Y. The guide portion 23a is provided at a central portion in the left-right direction X of the front side (+y side) edge portion of the top wall portion 22 a. The guide portion 23b is provided at a central portion in the left-right direction X of the edge portion of the rear side (-Y side) of the top wall portion 22 a. The guide portions 23a, 23b extend in the left-right direction X.

As shown in fig. 4, the guide portion 23a protrudes downward and obliquely forward from the edge portion of the front side (+y side) of the top wall portion 22 a. More specifically, the guide portion 23a protrudes downward and obliquely forward from an inner edge portion of a concave portion 22d recessed rearward (-Y side) in an edge portion of the front side of the top wall portion 22 a. The guide portion 23a is disposed opposite to the rear side (-Y side) of the wall main body portion 21d in the side wall portion 21 b. The guide portion 23a is located on the upper side of the guide portion 24 a. The guide portions 23a and 24a sandwich the front edge portion of the base 31a described later in the up-down direction Z. The guide portion 23a and the guide portion 24a approach each other in the up-down direction Z as being directed toward the front side.

The guide portion 23a has a guide surface 23c. The guide surface 23c is a surface facing the inside of the housing 20, among the surfaces of the guide portion 23 a. The guide surface 23c extends in the left-right direction X. In the present embodiment, the guide surface 23c is inclined downward toward the rear side. The edge portion on the front side (+y side) of the base 31a, which will be described later, is sandwiched between the guide surface 23c and the guide surface 24c in the up-down direction Z.

The guide portion 23b protrudes downward and obliquely rearward from the edge portion of the rear side (-Y side) of the top wall portion 22 a. More specifically, the guide portion 23b protrudes downward and obliquely rearward from an inner edge portion of the concave portion 22e recessed forward (+y side) of the rear edge portion of the top wall portion 22 a. The guide portion 23b is disposed opposite to the front side (+y side) of the wall main body portion 21e of the side wall portion 21 c. The guide portion 23b is located on the upper side of the guide portion 24 b. The guide portions 23b and 24b sandwich a rear edge portion of the base 31a described later in the up-down direction Z. The guide portion 23b and the guide portion 24b approach each other in the up-down direction Z as being directed to the rear side.

The guide portion 23b has a guide surface 23d. The guide surface 23d is a surface facing the inside of the housing 20, of the surfaces of the guide portion 23 b. The guide surface 23d extends in the left-right direction X. In the present embodiment, the guide surface 23d is oriented toward the front side and obliquely downward. The edge portion on the rear side (-Y side) of the base portion 31a described later is sandwiched between the guide surface 23d and the guide surface 24d in the up-down direction Z.

The guide surfaces 23c, 24c are disposed closer to the movable element 30 than the opposing surface 26b in the front-rear direction Y (-Y side). The guide surfaces 23d, 24d are disposed closer to the movable element 30 than the opposing surface 26c in the front-rear direction Y (on the +y side). The guide surfaces 23c, 23d are disposed closer to the movable element 30 than the opposing surface 26d in the up-down direction Z (the (-Z side). The guide surfaces 24c, 24d are disposed closer to the movable element 30 than the facing surface 26a in the up-down direction Z (on the +z side).

As shown in fig. 3, the housing 20 has protruding portions 25a, 25b, 25c, 25d. The protruding portions 25a and 25b protrude from the left side (-X side) of the inner wall surface of the side wall portion 22 b. The convex portions 25a and 25b are provided at both end portions of the side wall portion 22b in the front-rear direction Y. The protruding portions 25c and 25d protrude from the right side (+x side) surface, which is the inner wall surface of the side wall portion 22 c. The convex portions 25c and 25d are provided at both end portions of the side wall portion 22c in the front-rear direction Y. The convex portions 25a, 25b, 25c, 25d are formed by, for example, pressing a part of the side wall portions 22b, 22c in the left-right direction X.

In the present embodiment, the movable element 30 extends in the left-right direction X. The movable element 30 is movable in the left-right direction X within the housing 20. The movable element 30 has a movable element body 31 and a coil 32. In the present embodiment, the movable element 30 vibrates in the left-right direction X by the electromagnetic force generated between the coil 32 and the magnet 40 by supplying power to the coil 32 and the elastic force applied from the elastic member 50. The movable body 31 extends in the left-right direction X. The movable element main body 31 has a base 31a and protruding portions 31b, 31c. The base 31a is a portion holding the coil 32. As shown in fig. 2, the base 31a has a substantially rectangular parallelepiped shape that is flat in the up-down direction Z and extends in the left-right direction X.

The base 31a has a concave portion 31d recessed from the upper side of the base 31a toward the lower side. The inner edge of the concave portion 31d is rectangular when viewed from above. As shown in fig. 6, the base 31a has a concave portion 31g recessed upward from the lower side of the base 31 a. The inner edge of the concave portion 31g is rectangular when viewed from the bottom. As shown in fig. 4, the concave portion 31d and the concave portion 31g are provided at positions overlapping each other as viewed in the up-down direction Z. The base 31a has a through hole 31e penetrating the base 31a in the up-down direction Z. 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. The coil 32 is fitted inside the through hole 31e and held. Thereby, the coil 32 is attached to the movable body 31.

As shown in fig. 4, the base 31a is located inside surrounded by the bottom wall portion 21a, the top wall portion 22a, the guide portion 23b, the guide portion 24a, and the guide portion 24 b. The base 31a is supported by the guide portions 23a, 23b, 24a, and 24b so as to be movable in the left-right direction X. Thereby, the guide portions 23a, 23b, 24a, 24b guide the movement of the movable element 30 in the lateral direction X. The base 31a has guided surfaces 34a, 34b, 34c, 34d. That is, the movable element body 31 has guided surfaces 34a, 34b, 34c, 34d.

The guided surface 34a is provided at an upper end portion of the edge portion of the front side (+y side) of the base 31 a. The guided surface 34a extends in the left-right direction X toward the front side and obliquely upward. The guided surface 34a is formed by chamfering the corner portion of the front side and the upper side of the base 31a, for example. The guided surface 34a is disposed opposite to the guide surface 23 c. The guided surface 34a can contact the guide surface 23 c.

The guided surface 34b is provided at a lower end portion of the edge portion on the front side (+y side) of the base 31 a. The guided surface 34b is directed to the front side and obliquely downward, and extends in the left-right direction X. The guided surface 34b is formed by chamfering the corner portion of the front side and the lower side of the base 31a, for example. The guided surface 34b is disposed opposite to the guide surface 24 c. The guided surface 34b can contact the guide surface 24 c.

The guided surface 34c is provided at an upper end portion of the edge portion of the rear side (-Y side) of the base 31 a. The guided surface 34c extends in the left-right direction X toward the rear side and obliquely upward. The guided surface 34c is formed by chamfering the corner portion of the rear side and the upper side of the base 31 a. The guided surface 34c is disposed opposite to the guide surface 23 d. The guided surface 34c can contact the guide surface 23 d.

The guided surface 34d is provided at a lower end portion of the edge portion of the rear side (-Y side) of the base 31 a. The guided surface 34d extends in the left-right direction X toward the rear side and obliquely downward. The guided surface 34d is formed by chamfering the corner portion of the rear side and the lower side of the base 31a, for example. The guided surface 34d is disposed opposite to the guide surface 24 d. The guided surface 34d can contact the guide surface 24 d.

The guided surface 34a and the guided surface 34b are arranged at intervals in the up-down direction Z. The guided surface 34a and the guided surface 34b approach each other in the up-down direction Z as being directed toward the front side (+y side). The guided surface 34a and the guided surface 34b are sandwiched by the guide surface 23c and the guide surface 24c in the up-down direction Z. In a state where the guided surface 34a is in contact with the guide surface 23c and the guided surface 34b is in contact with the guide surface 24c, the front end surface of the base 31a is opposed to the front facing surface 26b of the base 31a with a gap therebetween in the front-rear direction Y. That is, in the present embodiment, the movable element 30 is in contact with the guide surfaces 23c and 24c, and is in a state of facing the facing surface 26b with a gap therebetween in the front-rear direction Y. Thus, in the present embodiment, the movable element 30 does not contact the facing surface 26 b.

The relationship between the guided surface 34c and the guided surface 34d is the same as that between the guided surface 34a and the guided surface 34b described above, except that the relationship is symmetrical in the front-rear direction Y. In a state where the guided surfaces 34c and 34d are in contact with the guide surfaces 23d and 24d, the movable element 30 is in a state of being opposed to the opposed surface 26c opposed to the rear side (-Y side) of the base 31a with a gap therebetween in the front-rear direction Y. Thus, in the present embodiment, the movable element 30 does not contact the facing surface 26 c.

In a state where the guided surface 34a is in contact with the guide surface 23c and the guided surface 34c is in contact with the guide surface 23d, the upper end surface of the base 31a is opposed to the upper opposed surface 26d opposed to the base 31a with a gap therebetween in the up-down direction Z. That is, in the present embodiment, the movable element 30 is in contact with the guide surfaces 23c and 23d, and is in a state of facing the facing surface 26d with a gap therebetween in the up-down direction Z. Thus, in the present embodiment, the movable element 30 does not contact the facing surface 26 d. In a state where the guided surfaces 34b and 34d are in contact with the guide surfaces 24c and 24d, the movable element 30 is in a state of being opposed to the lower opposed surface 26a opposed to the base 31a with a gap therebetween in the up-down direction Z. Thus, in the present embodiment, the movable element 30 does not contact the facing surface 26 a.

In the present embodiment, the guided surface 34a always faces the entire lateral direction X of the guide surface 23c of the guide portion 23a within the range in which the movable element 30 moves in the lateral direction X. The guided surface 34b always faces the entire lateral direction X of the guide surface 24c of the guide portion 24a within the range in which the movable element 30 moves in the lateral direction X. The guided surface 34c always faces the entire lateral direction X of the guide surface 23d of the guide portion 23b within the range in which the movable element 30 moves in the lateral direction X. The guided surface 34d always faces the entire lateral direction X of the guide surface 24d of the guide portion 24b within the range in which the movable element 30 moves in the lateral direction X. In the present embodiment, the positions of the guide portions 23a, 23b, 24a, 24b in the left-right direction X are included in the positions of the movable element 30 in the left-right direction X within the movement range of the movable element 30 in the left-right direction X. More specifically, the positions of the guide portions 23a, 23b, 24a, 24b in the left-right direction X are included in the positions of the base portion 31a in the left-right direction X within the movement range of the movable element 30 in the left-right direction X.

As shown in fig. 2, the protruding portion 31b protrudes rightward (+x side) from the base portion 31 a. The protruding portion 31c protrudes from the base portion 31a to the left side (-X side). The protruding portions 31b and 31c are, for example, substantially rectangular parallelepiped. The size of the protruding portions 31b, 31c in the front-rear direction Y is smaller than the size of the base portion 31a in the front-rear direction Y. In the present embodiment, the protruding portions 31b and 31c are provided at the central portion of the base portion 31a in the front-rear direction Y. Both ends of the protruding portions 31b, 31c in the front-rear direction Y are located at positions distant from both ends of the base portion 31a in the front-rear direction Y.

As shown in fig. 3, the dimension in the left-right direction X of the front portion 31h of the protruding portion 31b is smaller than the dimension in the left-right direction X of the rear portion 31i of the protruding portion 31 b. The right end (+x side) of the front portion 31h is located on the left side (-X side) of the right end of the rear portion 31 i. The dimension of the front portion 31h in the left-right direction X is smaller than the dimension of the protrusion 31c in the left-right direction X, for example. The dimension of the rear portion 31i in the left-right direction X is, for example, the same as the dimension of the protrusion 31c in the left-right direction X. In the present embodiment, the rear portion 31i is a portion of the movable body 31 that overlaps with a third extension 66 described later when viewed in the up-down direction Z.

The movable body 31 has projections 33a, 33b, 33c, 33d. The protruding portions 33a and 33b protrude rightward (+x) from both end portions of the right end portion of the base portion 31a in the front-rear direction Y. The convex portion 33a and the convex portion 33b sandwich the protruding portion 31b in the front-rear direction Y. The protruding portions 33c and 33d protrude leftward (-X) from both end portions of the left end portion of the base portion 31a in the front-rear direction Y. The convex portion 33c and the convex portion 33d sandwich the protruding portion 31c in the front-rear direction Y. The protruding portions 33a, 33b, 33c, 33d are, for example, rectangular parallelepiped. The protruding heights of the protruding portions 33a, 33b, 33c, 33d are smaller than the protruding heights of the protruding portions 31b, 31c.

As shown in fig. 2, the movable body 31 has a groove 31f. In the present embodiment, the groove 31f is provided across the front side portions 31h of the base 31a and the protruding portion 31 b. The groove 31f is recessed from the upper surface of the movable element body 31 toward the lower side, and extends in the left-right direction X. The left (-X side) end of the groove 31f opens into the recess 31 d. The right end of the groove 31f (+x side) is open at the right end face of the front portion 31 h. The groove 31f is provided on the front side (+y side) from the center of the movable element main body 31 in the front-rear direction Y.

The coil 32 is configured by winding a wire around a central axis J extending in the up-down direction Z. The central axis J is an imaginary axis suitably shown in the figures. For example, in a state where the movable element 30 is stationary, the center axis J passes through the center of the left-right direction X and the center of the front-rear direction Y of the housing 20. The coil 32 has a substantially annular shape centered on the central axis J when viewed in the up-down direction Z. The coil 32 is fitted into the through hole 31e and fixed to the movable body 31. As shown in fig. 4, 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 vertical direction Z as the lower end of the through hole 31e, for example. The coil 32 is supplied with electric power from the outside of the linear actuator 10 via the wiring member 60.

As shown in fig. 5, the magnet 40 is disposed in the housing 20 so as to face the coil 32 in the up-down direction Z perpendicular to the left-right direction X. A gap is provided between the magnet 40 and the coil 32 in the up-down direction Z. The magnet 40 has a rectangular plate shape with a plate surface facing the up-down direction Z and long in the front-back direction Y, for example. The 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 located on the upper side of the coil 32. The first magnet 41 and the second magnet 42 are fixed to the opposing surface 26d, which is the inner wall surface of the top wall 22 a. The first magnet 41 and the second magnet 42 are arranged in the left-right direction X. The second magnet 42 is located on the left (-X side) of the first magnet 41. The first magnet 41 and the second magnet 42 are in contact in the left-right direction X. For example, in a state where the movable element 30 is stationary, the center axis J passes between the first magnet 41 and the second magnet 42 in the left-right direction X.

The third magnet 43 and the fourth magnet 44 are located at the lower side of the coil 32. The third magnet 43 and the fourth magnet 44 are fixed to the facing surface 26a which is the inner wall surface of the bottom wall portion 21 a. The third magnet 43 and the fourth magnet 44 are arranged in the left-right direction X. The fourth magnet 44 is located on the left (-X side) of the third magnet 43. The third magnet 43 and the fourth magnet 44 are in contact in the left-right direction X. For example, in a state where the movable element 30 is stationary, the center axis J passes between the third magnet 43 and the fourth magnet 44 in the left-right direction X.

The first magnet 41 and the third magnet 43 are arranged so as to sandwich the coil 32 in the up-down direction Z. The first magnet 41 and the third magnet 43 are arranged to overlap each other when viewed in the vertical direction Z. The second magnet 42 and the fourth magnet 44 are arranged so as to sandwich the coil 32 in the up-down direction Z. The second magnet 42 and the fourth magnet 44 are arranged to overlap each other when viewed in the up-down direction Z.

Each magnet 40 has a magnetic pole along the up-down direction Z. The first magnet 41 has a magnetic pole 41N as an N pole on the upper side. The first magnet 41 has a magnetic pole 41S as an S pole on the lower side. The second magnet 42 has a magnetic pole 42S as an S-pole on the upper side. The second magnet 42 has a magnetic pole 42N as an N pole on the lower side. The third magnet 43 has a magnetic pole 43N as an N pole on the upper side. The third magnet 43 has a magnetic pole 43S as an S-pole at the lower side. The fourth magnet 44 has a magnetic pole 44S as an S-pole on the upper side. The fourth magnet 44 has a magnetic pole 44N as an N pole on the lower side.

The N pole and S pole of the first magnet 41 and the second magnet 42 disposed adjacently in the left-right direction X are disposed opposite to each other in the up-down direction Z. The N pole and S pole of the third magnet 43 and the fourth magnet 44 disposed adjacently in the left-right direction X are disposed opposite to each other in the up-down direction Z. The first magnet 41 and the third magnet 43 disposed so as to sandwich the coil 32 in the up-down direction Z are disposed in the same manner as each other in the N-pole and S-pole along the up-down direction Z. The second magnet 42 and the fourth magnet 44, which are disposed so as to sandwich the coil 32 in the up-down direction Z, are disposed in the same arrangement as each other in the up-down direction Z.

The elastic member 50 is a member that elastically deforms in response to the movement of the movable element 30 in the lateral direction X, and applies a force in the lateral direction X to the movable element 30. As shown in fig. 3, in the present embodiment, the elastic member 50 is a coil spring extending in the left-right direction X. The elastic member 50 includes a first elastic member 51, a second elastic member 52, a third elastic member 53, and a fourth elastic member 54.

The first elastic member 51 and the second elastic member 52 are located on the right side (+x side) of the movable element 30. In the present embodiment, the first elastic member 51 and the second elastic member 52 are located between the movable element 30 and the side wall portion 22b in the left-right direction X. The first elastic member 51 and the second elastic member 52 are arranged so as to sandwich the protruding portion 31b in the front-rear direction Y. The first elastic member 51 is located on the front side (+y side) of the protruding portion 31 b. The second elastic member 52 is located at the rear side (-Y side) of the protruding portion 31 b. The right end of the first elastic member 51 and the right end of the second elastic member 52 are in contact with the side wall portion 22b of the housing 20. The left end (-X side) of the first elastic member 51 and the left end of the second elastic member 52 are in contact with the base 31a of the movable element main body 31. The protruding portions 25a, 33a are inserted into both end portions of the first elastic member 51 in the lateral direction X, respectively. The protruding portions 25b, 33b are inserted into both end portions of the second elastic member 52 in the lateral direction X. Thereby, the position of the first elastic member 51 and the position of the second elastic member 52 are restrained from being shifted in the up-down direction Z and the front-rear direction Y.

In the present embodiment, the first elastic member 51 and the second elastic member 52 correspond to a pair of elastic members 50 which are positioned on the right side (+x side) of the movable element main body 31, and which sandwich the wiring member 60 in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z.

The third elastic member 53 and the fourth elastic member 54 are located on the left side (-X side) of the movable element 30. The third elastic member 53 and the fourth elastic member 54 are located between the movable element 30 and the side wall portion 22c in the left-right direction X. The third elastic member 53 and the fourth elastic member 54 are disposed so as to sandwich the protruding portion 31c in the front-rear direction Y. The third elastic member 53 is located on the front side (+y side) of the protruding portion 31 c. The fourth elastic member 54 is located at the rear side (-Y side) of the protruding portion 31 c. The left end of the third elastic member 53 and the left end of the fourth elastic member 54 are in contact with the side wall portion 22c of the housing 20. An end portion on the right side (+x side) of the third elastic member 53 and an end portion on the right side of the fourth elastic member 54 are in contact with the base portion 31a of the movable element main body 31. The protruding portions 25c and 33c are inserted into both end portions of the third elastic member 53 in the lateral direction X. The protruding portions 25d, 33d are inserted into both end portions of the fourth elastic member 54 in the left-right direction X. Thereby, the position of the third elastic member 53 and the position of the fourth elastic member 54 are restrained from being shifted in the up-down direction Z and the front-rear direction Y.

The first elastic member 51 and the third elastic member 53 are disposed so as to sandwich a portion of the base portion 31a located on the front side (+y side) of the protruding portions 31b, 31c in the left-right direction X. The second elastic member 52 and the fourth elastic member 54 are disposed so as to sandwich a portion of the base 31a located on the rear side (-Y side) of the protruding portions 31b, 31c in the left-right direction X.

When the movable element 30 moves rightward (+x-side) from the position shown in the figures, the first elastic member 51 and the second elastic member 52 undergo compressive elastic deformation in the left-right direction X. Thereby, the first elastic member 51 and the second elastic member 52 apply an elastic force to the movable element 30 to move the movable element 30 away from the side wall portion 22b, i.e., to move the movable element 30 toward the left side (-X side).

On the other hand, when the movable element 30 moves leftward (-X side) from the position shown in the figures, the third elastic member 53 and the fourth elastic member 54 undergo compressive elastic deformation in the left-right direction X. Thereby, the third elastic member 53 and the fourth elastic member 54 apply elastic force to the movable element 30 to move the movable element 30 away from the side wall portion 22c, i.e., to move the movable element 30 toward the right side (+x side).

The damper member 70 is fixed to the inner wall surface of the housing 20. The damper member 70 is opposed to the movable element body 31 in the left-right direction X. The damping member 70 dampens kinetic energy of an object that collides with the object. The damper member 70 is made of rubber, for example. The damper member 70 has a square shape when viewed in the left-right direction X, for example. In the present embodiment, the damper member 70 includes a first damper member 71 and a second damper member 72.

The first damper member 71 is fixed to the inner wall surface of the side wall 22b, i.e., the left (-X side) surface of the side wall 22 b. In the present embodiment, the first damper member 71 is located on the rear side (-Y side) of the center of the side wall portion 22b in the front-rear direction Y. The first damping member 71 is located on the right side (+x side) of the rear side portion 31i of the protruding portion 31 b.

The second damper member 72 is fixed to the inner wall surface of the side wall 22c, that is, the surface on the right side (+x side) of the side wall 22 c. In the present embodiment, the second damper member 72 is located at a position on the rear side (-Y side) from the center of the side wall portion 22c in the front-rear direction Y. The second damping member 72 is located on the left (-X side) of the rear side portion of the protruding portion 31 c. The first damper member 71 and the second damper member 72 are disposed so as to sandwich the movable body 31 in the left-right direction X.

The wiring member 60 is electrically connected to the coil 32 on the upper side of the movable body 31. The wiring member 60 is a member having flexibility. The wiring member 60 is, for example, a flexible printed board. In the present embodiment, the wiring member 60 has a band shape. The width direction of the strip-shaped wiring member 60 is the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z. In the following description of the wiring member 60, the dimension in the front-rear direction Y is sometimes simply referred to as "width".

As shown in fig. 2, the wiring member 60 has a coil connection portion 61, a first extension portion 62, a first connection portion 63, a second extension portion 64, a second connection portion 65, and a third extension portion 66. The wiring member 60 is configured by connecting the connecting portion 61, the first extending portion 62, the first connecting portion 63, the second extending portion 64, the second connecting portion 65, and the third extending portion 66 in this order. The thickness direction is the up-down direction Z in the coil connecting portion 61, the first extending portion 62, the second extending portion 64, the second connecting portion 65, and the third extending portion 66. In the first connection portion 63, the thickness direction is a direction perpendicular to the front-rear direction Y and intersecting the up-down direction Z.

The coil connection portion 61 is one end portion of the wiring member 60. The coil connecting portion 61 has a rectangular shape with rounded corners longer in the front-rear direction Y when viewed from the upper side. The coil connecting portion 61 is fixed to a portion of the bottom surface of the recess 31d located on the right side (+x side) of the coil 32. Coil lead wires 32a, 32b led out to the right from the coil 32 are electrically connected to the coil connection portion 61. That is, the coil 32 is electrically connected to the coil connection portion 61. Thereby, the coil 32 is electrically connected to the wiring member 60.

The first extension 62 is a portion located on the upper side of the movable element main body 31 and extending in the left-right direction X. The first extension 62 extends from a portion near the front side (+y side) to the right side (+x side) of the coil connecting portion 61. The first extension 62 extends into the groove 31f to a position on the right side of the front portion 31h of the protruding portion 31 b.

In the present embodiment, the first extension portion 62 has a wide portion 62a extending rightward (+x side) from the coil connection portion 61 and a narrow portion 62b connected to the right side of the wide portion 62 a. The wide portion 62a extends through the groove 31f to the right of the front portion 31h of the protruding portion 31 b. The width of the wide portion 62a is larger than the width of the narrow portion 62b and the width of the first connecting portion 63. The front edge of the wide portion 62a (+y side) protrudes forward from the front edge of the narrow portion 62b. The rear edge portion (-Y side) of the wide portion 62a and the rear edge portion of the narrow portion 62b are located at the same position in the front-rear direction Y.

The first connection portion 63 is connected to the right end (+x side) of the first extension portion 62, that is, the right end of the narrow portion 62 b. In the present embodiment, the first connection portion 63 is a portion bent downward with respect to the first extension portion 62. The first connection portion 63 is elastically deformed. As shown in fig. 5, for example, the first connecting portion 63 is curved in a shape of a circular arc protruding rightward when viewed from the rear side (-Y side). In the present embodiment, the first connecting portion 63 passes through the right side of the front portion 31h of the protruding portion 31b, and is bent in an arc shape from the upper side of the movable element main body 31 to the lower side of the movable element main body 31. The lower end of the first connecting portion 63 is connected to the right end of the second extending portion 64. Thereby, the first connecting portion 63 connects the right-side end portion in the first extending portion 62 and the right-side end portion in the second extending portion 64.

The second extension 64 is a portion that extends in the left-right direction X with the movable body 31 sandwiched therebetween in the up-down direction Z with respect to the first extension 62. The second extension portion 64 extends from the lower end of the first connection portion 63 to the left side (-X side). The left side portion of the second extension 64 is located on the lower side of the front side portion 31h in the protruding portion 31 b. The second extension 64 is disposed on the opposing surface 26 a.

As shown in fig. 3, the second connecting portion 65 connects the left side (-X side) end portion in the second extending portion 64 and the left side end portion in the third extending portion 66. For example, the second connection portion 65 has a substantially rectangular shape longer in the front-rear direction Y when viewed in the up-down direction Z. The second connection portion 65 is disposed across the lower side of the protruding portion 31b and the lower side of the base portion 31 a. The second connection 65 is disposed across the lower side of the front side portion 31h and the lower side of the rear side portion 31 i. The second connection portion 65 protrudes rearward (-Y side) than the second extension portion 64. The second connection portion 65 is disposed on the opposing surface 26 a.

As shown in fig. 5, the second connection portion 65 is supported from the left by the convex portion 27 provided on the inner wall surface of the housing 20. This suppresses the wiring member 60 from being displaced to the left in the housing 20. The convex portion 27 protrudes upward from the facing surface 26a which is the upper surface of the bottom wall portion 21 a. The convex portion 27 is formed by, for example, pressing a part of the bottom wall portion 21a to the upper side.

As shown in fig. 3, the third extension 66 is arranged in line with the second extension 64 in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z. The third extension 66 extends from the rear side portion of the second connection portion 65 to the right side (+x side). The third extension 66 is led out to the right side of the movable element main body 31. The third extension 66 penetrates the side wall 22b in the left-right direction X and is led out to the outside of the case 20. The third extension 66 extends, for example, from the housing 20 to the right. The portion of the third extension 66 located inside the housing 20 is disposed on the opposing surface 26 a. An external power supply, not shown, is connected to the third extension 66. The power of the external power source is supplied to the coil 32 via the wiring member 60.

The first extension 62, the first connection 63, the second extension 64, the second connection 65, and the third extension 66 are arranged as described above, and the wiring member 60 extends from the upper side of the movable element main body 31 to the lower side of the movable element main body 31 through the right side (+x side) of the movable element main body 31, and is led out from the lower side of the movable element main body 31 to the right side than the movable element main body 31. That is, the wiring member 60 is provided so as to sandwich the right side portion of the movable element main body 31 in the up-down direction Z, and is led out to the right side than the movable element main body 31. Therefore, the wiring member 60 is less likely to interfere with the movable element body 31 than in the case where the wiring member 60 is wound around the movable element body 31. In addition, the wiring member 60 can be prevented from becoming long. As a result, the housing 20 housing the movable element body 31 and the wiring member 60 can be prevented from being enlarged as compared with a case where the wiring member 60 is wound around the movable element body 31, for example. Therefore, the coil 32 can be provided to the movable element 30 while suppressing an increase in the size of the linear actuator 10.

The wiring member 60 extends from the upper side of the movable element body 31 to the lower side of the movable element body 31 through the right side (+x side) of the movable element body 31. Therefore, according to the movement of the movable element body 31 in the left-right direction X, a part of the wiring member 60 is relatively drawn into the lower side of the movable element body 31, or a part of the wiring member 60 is relatively drawn out from the lower side of the movable element body 31. Thus, the wiring member 60 can be moved relative to the movable element body 31 in accordance with the movement of the movable element body 31 in the left-right direction X. Therefore, the movement of the movable element main body 31 in the left-right direction X can be allowed while reducing the stress applied to the wiring member 60. Therefore, breakage of the wiring member 60 can be suppressed. This can suppress occurrence of a failure such as failure to supply electric power to the coil 32.

Specifically, for example, when the movable element main body 31 moves rightward (+x-side) from the position shown in fig. 5, a part of the first connecting portion 63 is relatively introduced to the lower side of the movable element main body 31. Thus, even if the movable element main body 31 moves rightward, the movable element main body 31 can be restrained from being strongly stretched or the like. On the other hand, in the case where the movable element main body 31 moves to the left side (-X side), the second extension 64 is relatively drawn out from the lower side of the movable element main body 31. Thus, even if the movable element main body 31 moves to the left, the movable element main body 31 can be restrained from being strongly stretched or the like. Thus, even if the movable element 30 moves in the left-right direction X, the application of stress to the wiring member 60 can be suppressed. Therefore, breakage or the like of the wiring member 60 can be suppressed.

In addition, the wiring member 60, which is disposed from the upper side of the movable element body 31 to the lower side of the movable element body 31 through the right side (+x side) of the movable element body 31, is led out from the lower side of the movable element body 31 to the right side than the movable element body 31. Accordingly, the wiring member 60 can be arranged without passing through the lower side of the coil 32. Thus, compared with a case where, for example, the wiring member 60 extending to the lower side of the movable element body 31 passes through the lower side of the coil 32 and is led out to the left side (-X side) than the movable element body 31, the linear actuator 10 can be suppressed from being enlarged in the up-down direction Z. In addition, the wiring member 60 can be further suppressed from becoming long.

In addition, according to the present embodiment, the third extension 66 led to the right side (+x side) of the movable element main body 31 is arranged in line with the second extension 64 in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z. Therefore, compared to the case where the second extension 64 and the third extension 66 are arranged to overlap in the up-down direction Z, the linear actuator 10 can be prevented from being enlarged in the up-down direction Z.

In addition, according to the present embodiment, the first connection portion 63 is a portion bent downward with respect to the first extension portion 62. Therefore, by bending the wiring member 60 along the movable element main body 31 to make the first connection portion 63, the wiring member 60 can be easily arranged from the upper side of the movable element main body 31 to the lower side of the movable element main body 31. Further, by disposing the wiring member 60 from the upper side of the movable element main body 31 to the lower side of the movable element main body 31, the first connection portion 63 located on the right side (+x side) of the movable element main body 31 can be bent in an arc shape having a relatively large radius. Therefore, even if the first connection portion 63 is bent with respect to the first extension portion 62, the stress applied to the first connection portion 63 can be made relatively small. This can further suppress breakage of the wiring member 60.

In addition, according to the present embodiment, the first extension portion 62 has a wide portion 62a having a larger width than the first connection portion 63. Therefore, the rigidity of the first extension 62 is easily increased. Thus, even in a state where the first connection portion 63 is bent, the first extension portion 62 connected to the first connection portion 63 is not easily deformed. Therefore, the portion of the first extension portion 62 connected to the first connection portion 63 can be suppressed from floating, and the first connection portion 63 can be suppressed from bulging upward. Therefore, interference between the wiring member 60 and the housing 20 can be suppressed. In addition, the housing 20 can be prevented from being enlarged. This can further suppress the linear actuator 10 from becoming larger.

Further, according to the present embodiment, the damper member 70 is provided so as to be fixed to the inner wall surface of the housing 20 and so as to face the movable element main body 31 in the left-right direction X. Therefore, when the movable element body 31 moves in the left-right direction X, the movable element body 31 contacts the damper member 70. Thereby, the kinetic energy of the movable element body 31 is damped by the damping member 70, and the movable element body 31 is restrained from directly contacting the inner wall surface of the housing 20. Therefore, the movable element main body 31 can be prevented from directly abutting against the inner wall surface of the housing 20 to generate noise.

In addition, according to the present embodiment, the damper member 70 includes the first damper member 71 located on the right side (+x side) of the portion of the movable element main body 31 overlapping the third extension 66 (i.e., the rear portion 31i of the protruding portion 31 b) as viewed in the up-down direction Z. By disposing the first damper member 71 on the right side of the rear portion 31i overlapping the third extension portion 66 in the up-down direction Z, the first damper member 71 can be prevented from interfering with the first connection portion 63, wherein the third extension portion 66 is disposed in alignment with the second extension portion 64 in the front-rear direction Y. Further, by disposing the first damper member 71 offset from the first connection portion 63 on the side (-Y side) of the third extension portion 66 arranged in the front-rear direction Y with respect to the second extension portion 64, it is possible to suppress an increase in the size of the linear actuator 10 in the front-rear direction Y, compared with the case where the first damper member 71 is disposed on the front side (+y side) of the first connection portion 63.

In addition, for example, in the case where the elastic member is a metal plate spring, a configuration may be considered in which a wire electrically connected to the coil 32 is electrically connected to the plate spring, and electric power is supplied to the coil 32 via the plate spring. In contrast, according to the present embodiment, the elastic member 50 is a coil spring. In this case, it is difficult to connect a wire or the like to the elastic member 50. Therefore, in the case where the elastic member 50 is a coil spring, a structure in which electric power is supplied to the coil 32 through the flexible wiring member 60 as in the present embodiment is useful. In the present embodiment, in the linear actuator 10 having such a structure in which the elastic member 50 is a coil spring, the wiring member 60 having flexibility is used to easily supply electric power to the coil 32, and at the same time, the linear actuator 10 can be prevented from being enlarged as described above.

Further, according to the present embodiment, the first elastic member 51 and the second elastic member 52 as the pair of elastic members 50 are arranged so as to sandwich the wiring member 60 in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z. Accordingly, the elastic force can be appropriately applied to the movable element main body 31 by the first elastic member 51 and the second elastic member 52. In addition, even if the wiring member 60 is sandwiched between the first elastic member 51 and the second elastic member 52 in the front-rear direction Y, since the wiring member 60 is arranged as described above, interference between the wiring member 60 and the first elastic member 51 and the second elastic member 52 can be suppressed.

Further, according to the present embodiment, by using coil springs as the elastic members 50, a structure can be adopted in which a pair of elastic members 50 are disposed on both sides of the movable element main body 31 in the left-right direction X, and a part of the movable element main body 31 is disposed between the pair of elastic members 50. Specifically, the protruding portion 31b may be disposed between the first elastic member 51 and the second elastic member 52 in the front-rear direction Y, and the protruding portion 31c may be disposed between the third elastic member 53 and the fourth elastic member 54 in the front-rear direction Y. This makes it possible to increase the mass of the movable element main body 31 to the extent that the protruding portions 31b and 31c are provided. Therefore, the kinetic energy of the movable element 30 when vibrating in the left-right direction X can be increased. Accordingly, vibration can be appropriately applied to the device mounted with the linear actuator 10 by the linear actuator 10.

In addition, according to the present embodiment, the wiring member 60 has a band shape. Therefore, the wiring member 60 is easily arranged to be bent. Specifically, the first connecting portion 63 is easily bent in an arc shape. In addition, according to the present embodiment, the width direction of the wiring member 60 is a direction perpendicular to both the left-right direction X and the up-down direction Z. Therefore, the thickness of the wiring member 60 in the up-down direction Z is easily reduced. This can further suppress the linear actuator 10 from becoming larger in the up-down direction Z. In addition, when the movable element main body 31 moves in the left-right direction X, as described above, a part of the wiring member 60 can be easily led to the lower side of the movable element main body 31 relatively, and a part of the wiring member 60 can be easily led out from the lower side of the movable element main body 31 relatively. This can more appropriately suppress the stress applied to the wiring member 60. Therefore, breakage of the wiring member 60 can be more appropriately suppressed.

In addition, according to the present embodiment, the material of the case 20 is a magnetic body. Therefore, when power is supplied to the coil 32, magnetic flux also flows in the case 20, and the magnetic circuit passing through the coil 32 and the magnet 40 is more appropriately configured. This can enhance the electromagnetic force generated between the coil 32 and the magnet 40. Therefore, the movable element 30 can be moved more appropriately in the left-right direction X.

Here, for example, when the magnet 40 is provided to the movable element 30 and the coil 32 is provided to the case 20, the magnet 40 may be magnetically attracted to the magnetic case 20, and friction may occur between the movable element 30 and the inner wall surface of the case 20. In this case, the movable element 30 is difficult to move in the left-right direction X.

In contrast, according to the present embodiment, the coil 32 is provided to the movable element 30, and the magnet 40 is fixed to the magnetic housing 20. Therefore, the movable element 30 can be restrained from being attracted to the housing 20. This can suppress friction between the movable element 30 and the inner wall surface of the housing 20. Therefore, the movable element 30 is prevented from being moved in the left-right direction X.

In addition, whether the coil 32 and the magnet 40 are provided in the movable element 30 or the housing 20, friction may occur between the movable element 30 and the inner wall surface of the housing 20 due to tilting of the movable element 30 in the housing 20, or the like. Even in this case, the movable element 30 is difficult to move in the left-right direction X.

In contrast, according to the present embodiment, the housing 20 includes guide portions 23a, 23b, 24a, 24b for guiding the movement of the movable element 30 in the lateral direction X. Therefore, the guide portions 23a, 23b, 24a, and 24b can suppress the movable element 30 from tilting in the housing 20. This can suppress friction between the movable element 30 and the inner wall surface of the housing 20. Therefore, the movable element 30 can be further suppressed from being difficult to move in the left-right direction X. Further, the vibration rotation of the movable element 30 in the housing 20 can be suppressed, and the generation of abnormal sound can be suppressed. Further, by providing the guide portions 23a, 23b, 24a, 24b in the housing 20, the clearance between the movable element 30 and the housing 20 can be easily reduced in the portions other than the guide portions 23a, 23b, 24a, 24b. Accordingly, the size of the movable element main body 31 can be appropriately increased in the housing 20, and the mass of the movable element main body 31 can be increased. Therefore, the kinetic energy of the movable element 30 when vibrating in the left-right direction X can be increased. Accordingly, vibration can be appropriately applied to the device mounted with the linear actuator 10 by the linear actuator 10.

In addition, according to the present embodiment, the position of the entire guide portions 23a, 23b, 24a, 24b in the left-right direction X is included in the position of the movable element 30 in the left-right direction X within the movement range of the movable element 30 in the left-right direction X. Therefore, the movable element 30 can be guided in the left-right direction X more stably by the guide portions 23a, 23b, 24a, 24 b.

In addition, according to the present embodiment, the guide portions 24a, 24b are provided at the corners of the bottom wall portion 21a and the pair of wall main portions 21d, 21e, respectively. Therefore, the movable element 30 is easily supported by the guide portions 24a, 24b in the up-down direction Z and the front-rear direction Y. Thus, the movable element 30 can be guided in the left-right direction X more stably by the guide portions 24a and 24 b. In addition, according to the present embodiment, the guide portions 24a and 24b are located inside the housing 20 with respect to the pair of wall body portions 21d and 21 e. Therefore, by supporting the movable element 30 by the guide portions 24a, 24b, friction between the movable element 30 and the inner wall surfaces of the pair of wall body portions 21d, 21e can be suppressed.

In addition, according to the present embodiment, the case 20 has a rectangular parallelepiped box shape extending in the left-right direction X. The guide portions 23a, 23b, 24a, 24b are provided at four corners of the housing 20, respectively, when viewed in the left-right direction X. Therefore, the movable element 30 can be guided in the left-right direction X more stably by the four guide portions 23a, 23b, 24a, 24 b.

In addition, according to the present embodiment, the movable element 30 is in a state of being in contact with the guide surfaces 23c, 24c, and is in a state of being opposed to the opposed surface 26b with a gap therebetween in the front-rear direction Y. Therefore, friction between the movable element 30 and the opposing surface 26b can be suppressed by the guide surfaces 23c, 24 c. This can suppress the movable element 30 from being difficult to move in the left-right direction X.

In addition, as with the effects of the guide surfaces 23c and 24c described above, friction between the movable element 30 and the opposing surface 26c can be suppressed by the guide surfaces 23d and 24 d. In addition, as with the effects of the guide surfaces 23c and 24c described above, friction between the movable element 30 and the opposing surface 26d can be suppressed by the guide surfaces 23c and 23 d. In addition, as with the effects of the guide surfaces 23c and 24c described above, friction between the movable element 30 and the opposing surface 26a can be suppressed by the guide surfaces 24c and 24 d. As described above, friction between the movable element 30 and both side surfaces in the up-down direction Z and both side surfaces in the front-rear direction Y of the inner wall surface of the housing 20 can be suppressed. Therefore, the movable element 30 can be moved appropriately in the left-right direction X. In the present embodiment, the intersecting direction of the opposing surfaces 26a, 26d opposing the movable element 30 is the up-down direction Z, and the intersecting direction of the opposing surfaces 26b, 26c opposing the movable element 30 is the front-back direction Y.

< Second embodiment >

In the following description of the embodiments, the same components as those of the above embodiments may be given the same reference numerals or the like as appropriate, and the description thereof may be omitted. As shown in fig. 7, the housing 120 of the linear actuator 110 of the present embodiment has a first housing member 121 and a second housing member 122. Unlike the second case member 22 of the first embodiment, the second case member 122 does not have the guide portions 23a and 23b. The side wall portion 121b of the first case member 121 is provided with a guide portion 128a. The side wall portion 121c is provided with a guide portion 128b. The guide portions 128a and 128b are formed by recessed portions toward the inner side (-Y side) of the housing 120 at the central portions of the side wall portions 121b and 121c in the up-down direction Z. Although not shown, the guide portions 128a and 128b extend in the left-right direction X.

The movable element 130 has guided concave portions 137a, 137b provided in the movable element main body 131. The guided recess 137a is recessed from the front side (+y side) of the movable element main body 131 toward the rear side (-Y side). The guided recess 137b is recessed from the front-facing side of the rear side of the movable element main body 131. Although not shown, the guided recessed portions 137a and 137b extend in the left-right direction X. The guide portion 128a is fitted into the guided recess 137 a. The guide portion 128b is fitted into the guided recess 137b. Thus, the movable element 130 can be easily and stably supported by the guide portions 128a and 128b. In the present embodiment, the movable element 130 is supported by the guide portions 128a and 128b in the up-down direction Z. The movable element 130 is disposed at a position apart from the bottom wall portion 21a and the top wall portion 22a in the up-down direction Z in a state supported by the guide portions 128a, 128b. Thereby, friction of the movable element 130 with the bottom wall portion 21a and the top wall portion 22a is suppressed.

In a state where the guide portions 128a and 128b are fitted in the guided recessed portions 137a and 137b, the movable element 130 is disposed so as to face the portions of the side wall portions 121b and 121c other than the portions where the guide portions 128a and 128b are provided, with a gap therebetween in the front-rear direction Y. Thereby, friction between the movable element 130 and the side wall portions 121b and 121c is suppressed. Other structures of the linear actuator 110 may be the same as those of the linear actuator 10 of the first embodiment described above.

< Third embodiment >

As shown in fig. 8 and 9, the housing 220 of the linear actuator 210 of the present embodiment has a first housing member 221 and a second housing member 222. The first case member 221 has a box shape with an upper side opening. As shown in fig. 9, the first case member 221 includes a bottom wall portion 221a, a pair of side wall portions 221b and 221c protruding upward from both edges of the bottom wall portion 221a in the front-rear direction Y, and a pair of side wall portions 221f and 221g protruding upward from both edges of the bottom wall portion 221a in the left-right direction X, respectively. The side wall 221f connects right (+x-side) end portions of the pair of side wall 221b and 221c to each other. The side wall 221g connects left (-X side) end portions of the pair of side wall 221b and 221 c. The side wall portions 221b, 221c, 221f, 221g protrude vertically upward from the peripheral edge portion of the bottom wall portion 221 a. In the present embodiment, the bottom wall portion 221a corresponds to "a first wall portion", and the pair of side wall portions 221b and 221c corresponds to "a pair of second wall portions".

The second housing member 222 is fixed to the upper side of the first housing member 221. The second housing member 222 closes the opening of the upper side of the first housing member 221. Unlike the first embodiment, the second housing member 222 does not have side wall portions 22b and 22c. In the present embodiment, the second case member 222 is constituted by a substantially rectangular plate-like top wall portion 222a having a plate surface facing the up-down direction Z. In the present embodiment, the first case member 221 is provided with a side wall portion 221f instead of the side wall portion 22b. The first case member 221 is provided with a side wall portion 221g instead of the side wall portion 22c.

The case 220 has hole portions 221h and 221i provided in a part of the left-right direction X of the edge portion of the bottom wall portion 221a in the front-rear direction Y. The hole portions 221h and 221i extend in the left-right direction X. The hole 221h is provided in the center portion in the left-right direction X of the edge portion on the front side (+y side) of the bottom wall 221 a. The hole 221h is provided across the bottom wall 221a and the side wall 221 b. The hole 221h is provided at a corner where the bottom wall 221a and the side wall 221b are connected. The hole 221i is provided in the center of the left-right direction X of the edge portion of the rear side (-Y side) of the bottom wall 221 a. The hole 221i is provided across the bottom wall 221a and the side wall 221 c. The hole 221i is provided at a corner of the bottom wall 221a connected to the side wall 221 c.

In the present embodiment, the guide portion 224a is connected to a first edge portion 221j located in the front-rear direction Y, among inner edge portions of the hole portion 221 h. The first edge 221j is an edge located on the rear side (-Y side) of the inner edge of the hole 221 h. The first edge 221j is provided on the bottom wall 221a. The guide portion 224a protrudes obliquely upward from the first edge portion 221j and toward the side wall portion 221b in the front-rear direction Y (the (+ Y direction). Both end portions of the guide portion 224a in the left-right direction X are disposed with a gap from a pair of second edge portions 221m located on both sides in the left-right direction X among inner edge portions of the hole portion 221 h. As shown in fig. 10, a gap G1 is provided between the guide portion 224a and the second edge portion 221 m. The shape of the guide portion 224a is the same as the shape of the guide portion 24a of the first embodiment.

As shown in fig. 8 and 9, in the present embodiment, the guide portion 224b is connected to a first edge portion 221k located in the front-rear direction Y, of the inner edge portions of the hole portions 221 i. The first edge 221k is an edge located on the front side (+y side) of the inner edge of the hole 221 i. The first edge 221k is provided on the bottom wall 221a. The guide portion 224b protrudes obliquely from the first edge portion 221k upward and toward the side wall portion 221c in the front-rear direction Y (-Y direction). Both end portions of the guide portion 224b in the left-right direction X are disposed with a gap from a pair of second edge portions 221p located on both sides in the left-right direction X among inner edge portions of the hole portion 221 i. A gap is provided between the guide portion 224b and the second edge portion 221 p. The shape of the guide portion 224b is the same as the shape of the guide portion 24b of the first embodiment.

In the present embodiment, the guide portion 23a is connected to an inner edge portion of a rear side (-Y side) of a recess 222d provided at an edge portion of a front side (+y side) of the top wall portion 222 a. Both edges of the recess 222d in the left-right direction X are provided apart from both edges of the guide portion 23a in the left-right direction X. As shown in fig. 10, a gap G2 is provided between the guide portion 23a and the inner edge portion of the recess 222d in the lateral direction X.

As shown in fig. 8 and 9, in the present embodiment, the guide portion 23b is connected to an inner edge portion of the front side (+y side) of the concave portion 222e provided at the edge portion of the rear side (-Y side) of the top wall portion 222 a. Both edges of the recess 222e in the left-right direction X are provided apart from both edges of the guide 23b in the left-right direction X. A gap is provided between the guide portion 23b and the inner edge portion of the recess 222e in the lateral direction X. Other structures of the linear actuator 210 of the present embodiment can be the same as those of the linear actuator 10 of the first embodiment.

According to the present embodiment, the case 220 has hole portions 221h and 221i provided in a part of the left-right direction X in the edge portion of the bottom wall portion 221a in the front-rear direction Y. The guide portions 224a and 224b are connected to first edge portions 221j and 221k located in the front-rear direction Y among the inner edge portions of the hole portions 221h and 221i. Accordingly, by providing the hole portions 221h, 221i locally in the bottom wall portion 221a while providing the pair of side wall portions 221b, 221c projecting directly perpendicularly from the edge portions of the bottom wall portion 221a in the front-rear direction Y, the guide portions 224a, 224b can be provided in the first edge portions 221j, 221k of the hole portions 221h, 221i. As a result, for example, the rigidity of the side wall parts 221b and 221c with respect to the vertical direction Z is easily increased as compared to the case where the lower side portions of the side wall parts are guide parts inclined with respect to the vertical direction Z over the entire axial direction as in the side wall parts 21b and 21c of the first embodiment. Therefore, even when a compressive force in the up-down direction Z is applied to the housing 220 by the magnetic force generated between the magnet 40 and the coil 32, for example, the housing 220 can be restrained from being compressively deformed in the up-down direction Z. Therefore, the gap between the top wall portion 222a and the movable element 30 and the gap between the bottom wall portion 221a and the movable element 30 can be suppressed from becoming too small. This can suppress deformation of the case 220 and pressing of the case against the movable element 30, and can suppress difficulty in moving the movable element 30.

In addition, according to the present embodiment, the guide portion 224a protrudes obliquely from the first edge portion 221j upward and toward the side wall portion 221b in the front-rear direction Y. Therefore, the guide portion 224a can support the movable element 30 in the up-down direction Z and the front-rear direction Y. Thus, the guide portion 224a can stably guide the movable element 30 in the left-right direction X. The same effect is obtained by the guide 224 b.

Further, according to the present embodiment, the both end portions of the guide portion 224a in the left-right direction X are arranged with a gap from a pair of second edge portions 221m located on both sides in the left-right direction X among the inner edge portions of the hole portion 221h in the left-right direction X. Therefore, a gap G1 is provided between the guide portion 224a and the second edge portion 221m in the lateral direction X. Thus, for example, in the case where the first case member 221 is manufactured by press working a metal plate, when the guide 224a is manufactured by bending a plate-like portion, which is obtained by punching a part of the metal plate, obliquely upward, it is possible to suppress deformation of portions other than the plate-like portion due to the influence of the plate-like portion. Therefore, the plate-like portion is easily bent, and the guide portion 224a is easily manufactured. The same effect is obtained by the guide 224 b.

Further, according to the present embodiment, the both end portions in the left-right direction X of the guide portion 23a are arranged with a gap therebetween from the edge portions located on both sides in the left-right direction X of the inner edge portions of the recess 222d in the left-right direction X. Therefore, a gap G2 is provided between the guide portion 23a and the edge portion of the recess 222d in the lateral direction X. Thus, for example, in the case where the second case member 222 is manufactured by press working a metal plate, when the guide portion 23a is manufactured by bending a plate-like portion, which is obtained by punching a part of the metal plate, obliquely downward, it is possible to suppress deformation of portions other than the plate-like portion due to the influence of the plate-like portion. Therefore, the plate-like portion is easily bent, and the guide portion 23a is easily manufactured. The same effect is obtained for the guide portion 23b of the present embodiment.

< Fourth embodiment >, a third embodiment

As shown in fig. 11, in the linear actuator 310 of the present embodiment, the first housing member 321 of the housing 320 is different from the first housing member 221 of the third embodiment, and does not have the hole portions 221h and 221i. The first housing member 321 is provided with guide portions 328a, 328b, 328d, 328f instead of the guide portions 224a, 224b of the third embodiment. Other structures of the first housing member 321 are the same as those of the first housing member 221 of the third embodiment.

The guide portion 328a is provided on a side wall portion 321b on the front side (+y side) of the first casing member 321. The guide portion 328a is provided at a central portion in the vertical direction Z and at a central portion in the horizontal direction X in the side wall portion 321b. The guide portion 328a extends in the left-right direction X. The guide portion 328a is formed by, for example, crimping a part of the side wall portion 321b to the rear side (-Y side). The guide portion 328a protrudes from the rear side of the side wall portion 321b toward the rear side. The guide portion 328a has an arc shape protruding rearward toward the movable element 30 when viewed in the left-right direction X.

The guide portion 328b is provided on a rear side (-Y side) side wall portion 321c of the first casing member 321. The guide portion 328b is provided at a central portion in the vertical direction Z and at a central portion in the horizontal direction X in the side wall portion 321c. The guide portion 328b extends in the left-right direction X. The guide portion 328b is formed by, for example, crimping a part of the side wall portion 321c toward the front side (+y side). The guide portion 328b protrudes from the front side surface of the side wall portion 321c. The guide portion 328b has an arc shape protruding toward the front side of the movable element 30 when viewed in the left-right direction X. The pair of guide portions 328a and 328b are disposed so as to sandwich the base portion 31a of the movable element 30 in the front-rear direction Y, which is a vertical direction perpendicular to the left-right direction X.

The guide portions 328d and 328f are provided in the lower bottom wall portion 321a of the first housing member 321. The guide portion 328d and the guide portion 328f are disposed with a gap therebetween in the front-rear direction Y. The guide portion 328d is located on the front side (+y side) of the coil 32. The guide portion 328f is located at a position on the rear side (-Y side) of the coil 32. The guide portions 328d and 328f are provided at the center portion in the left-right direction X of the bottom wall portion 321a. The guide portions 328d, 328f extend in the left-right direction X. The guide portions 328d and 328f are formed by, for example, pressing a part of the bottom wall portion 321a upward. The guide portions 328d, 328f protrude upward from the upper side of the bottom wall portion 321a. The guide portions 328d and 328f have an arc shape protruding upward toward the movable element 30 when viewed in the left-right direction X.

The second housing member 322 is provided with guide portions 328c, 328e instead of the guide portions 23a, 23b and the concave portions 222d, 222e of the third embodiment described above. Other structures of the second housing part 322 are the same as those of the second housing part 222 of the third embodiment.

The guide portions 328c, 328e are provided to the top wall portion 322a of the second housing member 322. The guide portion 328c and the guide portion 328e are arranged with a gap therebetween in the front-rear direction Y. The guide portion 328c is located on the front side (+y side) of the coil 32. The guide portion 328e is located at a position on the rear side (-Y side) of the coil 32. The guide portions 328c and 328e are provided at the center portion of the top wall portion 322a in the left-right direction X. The guide portions 328c, 328e extend in the left-right direction X. The guide portions 328c and 328e are formed by, for example, pressing a part of the top wall portion 322a downward. The guide portions 328c, 328e protrude from the lower surface of the lower side of the top wall portion 322a. The guide portions 328c and 328e have an arc shape protruding downward toward the movable element 30 when viewed in the left-right direction X.

The pair of guide portions 328c and 328d are disposed so as to sandwich a portion of the base portion 31a of the movable element 30 located on the front side (+y side) of the coil 32 in the up-down direction Z. The pair of guide portions 328e and 328f are disposed so as to sandwich a portion of the base portion 31a of the movable element 30 located at a position on the rear side (-Y side) of the coil 32 in the up-down direction Z. Other structures of the linear actuator 310 of the present embodiment can be the same as those of the linear actuator of the above embodiments.

According to the present embodiment, the guide portion includes a pair of guide portions 328a, 328b arranged so as to sandwich the movable element 30 in the front-rear direction Y, which is a vertical direction perpendicular to the left-right direction X, and a pair of guide portions 328c, 328d arranged so as to sandwich the movable element 30 in the up-down direction Z perpendicular to both the left-right direction X and the front-rear direction Y. Therefore, the movable element 30 can be stably supported by the guide portions in the up-down direction Z and the front-rear direction Y. The guide portion includes a pair of guide portions 328e and 328f arranged so as to sandwich the movable element 30 in the up-down direction Z. That is, the guide portion includes two pairs of guide portions arranged so as to sandwich the movable element 30 in the up-down direction Z. Therefore, the movable element 30 can be supported more stably in the up-down direction Z and the front-rear direction Y by the respective guide portions.

< Fifth embodiment >, a third embodiment

As shown in fig. 12, the housing 420 of the linear actuator 410 of the present embodiment has a first housing member 421 and a second housing member 422. The first case member 421 has a first case member body 421m and guide portions 428a, 428d. The second housing member 422 has a second housing member body 422m and a guide 428c. The guide portions 428a, 428d are separate from the first housing member body 421 m. The guide portion 428c is separate from the second housing member body 422 m.

The housing 420 has a housing body 420m composed of a first housing member body 421m and a second housing member body 422 m. Guide portions 428a, 428c, 428d are attached to the case main body 420m. Although not shown, the guide portions 428a, 428c, 428d extend in the left-right direction X. The guide portions 428a, 428c, 428d are made of a material different from that of the case main body 420m. In the present embodiment, the material constituting the case body 420m is metal. In the present embodiment, the material constituting the guide portions 428a, 428c, 428d is resin.

The first case member body 421m differs from the first case member 321 of the fourth embodiment in that a through hole 421k is provided instead of the guide portion 328a, and a through hole 421j is provided instead of the guide portion 328d. The through hole 421k penetrates the side wall 421b in the front-rear direction Y. The through hole 421j penetrates the bottom wall 421a in the up-down direction Z. Although not shown, the through holes 421k and 421j extend in the left-right direction X. Although not shown, the first case member body 421m is different from the first case member 321 of the fourth embodiment in that through holes similar to the through holes 421k and 421j are provided instead of the guide portions 328b and 328f. The other structure of the first case member body 421m is the same as the other structure of the first case member 321 of the fourth embodiment.

The second housing member main body 422m is different from the second housing member 322 of the fourth embodiment in that a through hole 422f is provided instead of the guide portion 328c. The through hole 422f penetrates the top wall portion 422a in the up-down direction Z. Although not shown, the through hole 422f extends in the left-right direction X. The second housing member main body 422m is different from the second housing member 322 of the fourth embodiment in that a through hole similar to the through hole 422f is provided instead of the guide portion 328e. Other structures of the second housing member main body 422m are the same as those of the second housing member 322 of the fourth embodiment.

The guide portion 428a includes a fixing portion 428g fitted into the through hole 421k and fixed, and a main body portion 428h connected to the rear side (-Y side) of the fixing portion 428 g. The fixing portion 428g may be fixed by press fitting or by an adhesive. The body portion 428h is located inside the housing body 420 m. The main body 428h protrudes from both sides of the fixing portion 428g and the through hole 421k in the vertical direction Z. The main body portion 428h has a guide surface 428p facing the rear side. The guide surface 428p is a flat surface perpendicular to the front-rear direction Y. The guide surface 428p faces the front side (+y side) end surface of the base 31 a. The guide surface 428p can be in contact with the front end surface of the base 31 a. In fig. 12, the guide surface 428p is shown in contact with the front end surface of the base 31a, but a slight gap may be provided between the guide surface 428p and the front end surface of the base 31 a.

The guide portion 428c includes a fixing portion 428i fitted into the through hole 422f and fixed thereto, and a main body portion 428j connected to the lower side of the fixing portion 428 i. The fixing portion 428i may be fixed by press fitting or by an adhesive. The main body 428j is located inside the case main body 420 m. The main body portion 428j protrudes from both sides of the fixing portion 428i and the through hole 422f in the front-rear direction Y. The main body portion 428j has a guide surface 428q facing downward. The guide surface 428q is a flat surface perpendicular to the up-down direction Z. The guide surface 428q faces the upper end surface of the base 31 a. The guide surface 428q can be in contact with the upper end surface of the base 31 a. In fig. 12, the guide surface 428q is shown facing the upper end surface of the base 31a with a slight gap therebetween, but the guide surface 428q may contact the upper end surface of the base 31 a.

The guide portion 428d includes a fixing portion 428k fitted into the through hole 421j and fixed thereto, and a main body portion 428m connected to an upper side of the fixing portion 428 k. The fixing portion 428k may be fixed by press fitting or by an adhesive. The body portion 428m is located inside the housing body 420 m. The main body portion 428m protrudes from both sides of the fixing portion 428k and the through hole 421j in the front-rear direction Y. The main body portion 428m has a guide surface 428r facing upward. The guide surface 428r is a flat surface perpendicular to the up-down direction Z. The guide surface 428r faces the lower end surface of the base 31 a. The guide surface 428r can contact the lower end surface of the base 31 a. In fig. 12, the guide surface 428r is shown facing the lower end surface of the base 31a with a slight gap therebetween, but the guide surface 428r may contact the lower end surface of the base 31 a. The guide surface 428q of the guide portion 428c and the guide surface 428r of the guide portion 428d are disposed so as to sandwich a portion of the base portion 31a located on the front side (+y side) of the coil 32 in the up-down direction Z.

Although not shown, the same guide portions as the guide portions 428a, 428c, and 428d are attached to the through holes provided in place of the guide portions 328b, 328e, and 328f of the fourth embodiment. Other structures of the linear actuator 410 can be the same as those of the linear actuator of the above embodiments.

According to the present embodiment, the material constituting the guide portions 428a, 428c, 428d is different from the material constituting the case main body 420 m. Therefore, for example, the material constituting the case main body 420m is made of a relatively high-strength material to increase the rigidity of the case 420, and the material constituting the guide portions 428a, 428c, 428d is made of a material capable of reducing the friction force with the movable element 30, whereby the friction force between the guide portions 428a, 428c, 428d and the movable element 30 can be reduced.

In addition, according to the present embodiment, the material constituting the case main body 420m is metal, and the material constituting the guide portions 428a, 428c, 428d is resin. Therefore, it is easy to appropriately increase the rigidity of the case main body 420m while reducing the friction force between the guide portions 428a, 428c, 428d and the movable element 30. Thus, the guide portions 428a, 428c, 428d can appropriately guide the movable element 30 in the left-right direction X. Further, the shape of the guide portions 428a, 428c, 428d can be freely determined by separating the guide portions 428a, 428c, 428d from the case main body 420 m. Therefore, the areas of the guide surfaces 428p, 428q, 428r of the guide portions 428a, 428c, 428d are easily increased. Thus, the areas of the guide surfaces 428p, 428q, 428r can be increased, and the movable element 30 can be stably supported by the guide surfaces 428p, 428q, 428 r.

< Sixth embodiment >

As shown in fig. 13, the wiring member 560 of the linear actuator 510 of the present embodiment includes a coil connection portion 61, a first extension portion 562, a first connection portion 63, a second extension portion 64, a second connection portion 65, a third extension portion 566, a fourth extension portion 567a, a third connection portion 567b, a fifth extension portion 567c, and a fourth connection portion 567d. The first extension portion 562 is the same as the first extension portion 62 of the first embodiment except that the width in the front-rear direction Y is uniform. In the present embodiment, the third extension 566 is identical to the third extension 66 of the first embodiment except that it is located at the center in the front-rear direction Y of the linear actuator 510. In the present embodiment, the wiring member 560 has a symmetrical shape in the front-rear direction Y. The wiring member 560 may have an asymmetric shape in the front-rear direction Y.

The fourth extension 567a is located on the upper side of the movable element main body 31. The fourth extension 567a extends in the left-right direction X. In the present embodiment, the first extension 562 and the fourth extension 567a are arranged with a gap therebetween in the front-rear direction Y. The fourth extension 567a is located at the rear side (-Y side) of the first extension 562. The fourth extension 567a has the same shape as the first extension 562. The first extension portion 562 and the fourth extension portion 567a are symmetrically arranged in the front-rear direction Y with the center of the third extension portion 566 in the front-rear direction Y interposed therebetween. In the present embodiment, the first extension portion 562 and the fourth extension portion 567a extend from the coil connecting portion 61 to the right side (+x side). The first extension portion 562 extends rightward from an end portion of the front side (+y side) of the coil connecting portion 61. The fourth extension 567a extends rightward from the rear end of the coil connection portion 61.

The fifth extension 567c is located at the lower side of the movable element main body 31. The fifth extension 567c extends in the left-right direction X. The fifth extension 567c and the fourth extension 567a sandwich the movable body 31 therebetween in the up-down direction Z. The fifth extension 567c is disposed with a gap from the rear side (-Y side) of the second extension 64. The second extension 64 and the fifth extension 567c are arranged so as to sandwich the third extension 566 in the front-rear direction Y. The second extension 64 and the fifth extension 567c are symmetrically arranged in the front-rear direction Y with the center of the third extension 566 in the front-rear direction Y. The shape of the fifth extension 567c is the same as that of the second extension 64, except that it is inverted in the front-rear direction Y.

The third connection portion 567b connects the right-side (+x-side) end portion of the fourth extension portion 567a and the right-side end portion of the fifth extension portion 567 c. The third connection portion 567b is disposed with a gap from the rear side (-Y side) of the first connection portion 63. The third connection portion 567b has the same shape as the first connection portion 63. The first connection portion 63 and the third connection portion 567b are symmetrically arranged in the front-rear direction Y with the center of the third extension 566 in the front-rear direction Y interposed therebetween.

The fourth connection portion 567d connects the left end (-X side) in the fifth extension portion 567c and the left end in the third extension portion 566. The fourth connection portion 567d is connected to the rear side (-Y side) of the second connection portion 65. The second connection portion 65 and the fourth connection portion 567d are connected to each other in the front-rear direction Y, and form a band-like portion extending in the front-rear direction Y. In the present embodiment, the third extension 566 extends rightward (+x side) from the connection portion of the second connection portion 65 and the fourth connection portion 567 d.

In the present embodiment, among the wiring lines, not shown, provided in the wiring member 560, the wiring line electrically connected to the coil lead-out line 32a extends to the third extension 566 in order of the fourth extension 567a, the third connection 567b, the fifth extension 567c, and the fourth connection 567 d. The wiring electrically connected to the coil lead wire 32b among the wirings provided in the wiring member 560 extends to the third extension 566 in order of the first extension 562, the first connection 63, the second extension 64, and the second connection 65. Other structures of the linear actuator 510 can be the same as those of the linear actuator of the above embodiments.

According to the present embodiment, the wiring member 560 has a fourth extension portion 567a, a third connection portion 567b, a fifth extension portion 567c, and a fourth connection portion 567d in addition to the first extension portion 562, the first connection portion 63, the second extension portion 64, and the second connection portion 65. The first extension portion 562 and the fourth extension portion 567a are arranged with a gap therebetween in the front-rear direction Y, and extend rightward (+x side) from the coil connection portion 61. Accordingly, two paths connecting the connecting portion 61 and the third extension portion 566 can be provided in the wiring member 560. Thus, the wirings electrically connected to the pair of coil lead wires 32a and 32b can be led to the third extension 566 via different paths.

< Seventh embodiment >, a third embodiment

As shown in fig. 14, the wiring member 660 of the linear actuator 610 of the present embodiment has a first coil connecting portion 661a, a first extension portion 662, a first connecting portion 663, a second extension portion 64, a second connecting portion 65, a third extension portion 66, a second coil connecting portion 661b, a sixth extension portion 668, and a fifth connecting portion 669.

The first coil connecting portion 661a is electrically connected to the coil 32 on the upper side of the movable body 31. In the present embodiment, the first coil connecting portion 661a is disposed on the bottom surface of the recess 31 d. The second coil connecting portion 661b is electrically connected to the coil 32 at the lower side of the movable body 31. In the present embodiment, the second coil connecting portion 661b is disposed on the bottom surface of the recess 31 g. The first coil connecting portion 661a and the second coil connecting portion 661b are arranged so as to sandwich the movable body 31 in the up-down direction Z. Although not shown, a pair of coil lead wires led out from the coil 32 are connected to the first coil connecting portion 661a and the second coil connecting portion 661b, respectively.

In the present embodiment, the first extension portion 662 extends rightward (+x side) from the first coil connecting portion 661 a. Other structures of the first extension portion 662 are the same as those of the first extension portion 562 of the sixth embodiment. The sixth extension 668 extends from the second coil connecting portion 661b to the right side (+x side). The sixth extension 668 is located on the front side (+y side) of the second extension 64.

The first connecting portion 663 connects the right-side (+x-side) end portion in the first extension portion 662 and the right-side end portion in the second extension portion 64. The fifth connecting portion 669 connects the right end in the first extension 662 and the right end in the sixth extension 668. The first connecting portion 663 and the fifth connecting portion 669 are arranged in an aligned manner in the front-rear direction Y. The fifth connecting portion 669 is located on the front side (+y side) of the first connecting portion 663. The shape of the fifth connecting portion 669 is the same as the shape of the first connecting portion 663. The size of the first connecting portion 663 in the front-rear direction Y and the size of the fifth connecting portion 669 in the front-rear direction Y are smaller than the size of the first extending portion 662 in the front-rear direction Y. The other structure of the first connecting portion 663 is the same as the other structure of the first connecting portion 63 of the first embodiment.

In the present embodiment, among the wiring lines, not shown, provided in the wiring member 660, the wiring line provided in the first coil connecting portion 661a is electrically connected to one of the pair of coil lead lines, and extends to the third extending portion 66 through the first extending portion 662, the first connecting portion 663, the second extending portion 64, and the second connecting portion 65 in this order. The wiring provided in the second coil connecting portion 661b among the wiring not shown provided in the wiring member 660 is electrically connected to the other of the pair of coil lead wires, and extends to the third extending portion 66 through the sixth extending portion 668, the fifth connecting portion 669, the first extending portion 662, the first connecting portion 663, the second extending portion 64, and the second connecting portion 65 in this order. Other structures of the linear actuator 610 can be the same as those of the linear actuator of the above embodiments.

According to the present embodiment, the wiring member 660 has a first coil connecting portion 661a electrically connected to the coil 32 on the upper side of the movable body 31 and a second coil connecting portion 661b electrically connected to the coil 32 on the lower side of the movable body 31. Therefore, even when one of the pair of coil lead wires led out from the coil 32 is led out from the upper side of the coil 32 and the other is led out from the lower side of the coil 32, the pair of coil lead wires can be easily connected to the first coil connecting portion 661a and the second coil connecting portion 661b, respectively. Thus, the coil 32 having the pair of coil lead wires led out from the opposite sides of the vertical direction Z can be easily electrically connected to the wiring member 660.

The coil 32 having a pair of coil lead wires led out from opposite sides of the vertical direction Z is, for example, a single-layer wound coil, a multi-layer wound coil having an odd number of layers, or the like. In the case where the coil 32 is a multi-layer wound coil, the wire material constituting the coil 32 is configured by alternately stacking layers wound from one direction to the other in the up-down direction Z and layers wound from one direction to the other in the up-down direction Z. In this case, when the number of layers of the coil 32 is an even number, the pair of coil lead wires are led out from the same side in the up-down direction Z, and when the number of layers of the coil 32 is an odd number, the pair of coil lead wires are led out from different sides in the up-down direction Z.

In addition, according to the present embodiment, the wiring member 660 has a sixth extension portion 668 extending rightward (+x-side) from the second coil connecting portion 661b, and a fifth connecting portion 669 connecting the right-side end portion of the first extension portion 662 and the right-side end portion of the sixth extension portion 668. Therefore, the sixth extension portion 668 extending from the second coil connecting portion 661b can be merged with the first extension portion 662 extending from the first coil connecting portion 661 a. Thereby, the arrangement complexity of the wiring member 660 can be suppressed.

< Eighth embodiment >, a third embodiment

As shown in fig. 15, the wiring member 760 of the linear actuator 710 according to the present embodiment differs from the wiring member 60 according to the first embodiment in the orientation from which the third extension 766 is led. In the present embodiment, the third extension 766 extends from the left (-X side) end of the second extension 64 in the direction intersecting the left-right direction X. In more detail, the third extension 766 extends from the left end portion to the rear side (-Y side) in the second extension 64. That is, in the present embodiment, the third extension 766 extends from the left end portion of the second extension 64 in the front-rear direction Y perpendicular to both the left-right direction X and the up-down direction Z. The third extension portion 766 is led out from the inside of the housing 720 to the outside of the housing 720 through a through hole 721m provided in a side wall portion 721c on the rear side in the first housing member 721 of the housing 720. In the present embodiment, the third extension 766 is led out of the housing 720 through the lower side of the second elastic member 52 and the lower side of the movable element main body 31. Other structures of the wiring member 760 are the same as those of the wiring member 60 of the first embodiment.

As described above, in the present embodiment, the wiring member 760 extends from the upper side of the movable element main body 31 to the lower side of the movable element main body 31 through the right side (+x side) of the movable element main body 31, and is drawn out from the lower side of the movable element main body 31 in the direction intersecting the left-right direction X. Other structures of the linear actuator 710 can be the same as those of the linear actuator of each of the above embodiments.

Even in the case where the third extension 766 extends in the direction intersecting the left-right direction X as in the present embodiment, as in the case of the first embodiment, the housing 720 accommodating the movable body 31 and the wiring member 760 can be suppressed from being enlarged as compared with the case where the wiring member 760 is wound around the movable body 31 or the like. Therefore, the coil 32 can be provided to the movable element 30 while suppressing an increase in the size of the linear actuator 710.

In addition, according to the present embodiment, the third extension 766 extends from the left (-X side) end portion of the second extension 64 in the front-rear direction Y perpendicular to the left-right direction X. Therefore, the third extension portion 766 is more easily led out of the housing 720 from the side wall portion 721c of the rectangular parallelepiped box-shaped housing 720 than in the case where the third extension portion 766 extends in a direction inclined with respect to the left-right direction X.

The present invention is not limited to the above-described embodiments, and other configurations can be adopted within the scope of the technical idea of the present invention. The wiring member may be made of any material. The wiring member may not have flexibility. The wiring members may be of any shape or may be arranged arbitrarily. The first extension may not have a wide portion. The third extension portion may be disposed so as to overlap the second extension portion in the second direction. The third extension may extend in any direction. The third extension portion may extend in the up-down direction Z of the above embodiment. For example, in the eighth embodiment, the third extension 766 may extend downward from the left (-X side) end of the second extension 64. The wiring member may be linear.

The elastic member may be any kind of elastic member as long as it is elastically deformed in accordance with the movement of the movable element in the first direction (the left-right direction X) and applies a force in the first direction (the left-right direction X) to the movable element. The elastic member may be a leaf spring. The number of the elastic members is not particularly limited. The elastic member may be provided with only one.

The shape of the movable element main body is not particularly limited. The number, shape and arrangement of the magnets are not particularly limited. The linear actuator may be configured such that a magnet is provided to the movable element, and a coil is fixed to the housing. The damping member may be any kind of damping member. The damping member may not be provided. The material of the case may be a nonmagnetic material. The shape of the case is not particularly limited. The shape of the guide portion is not particularly limited. The number of the guide portions is not particularly limited. A solid lubricating coating such as a fluororesin coating may be applied to at least one of the guide portion and the portion of the movable element supported by the guide portion. A lubricant such as grease may be provided between the guide portion and the portion of the movable element supported by the guide portion. The guide portion may not be provided.

Other ways of linear actuator may be as follows: the linear actuator has: a movable element movable in a predetermined first direction, the movable element including a movable element main body and a coil attached to the movable element main body; a housing that accommodates the movable element therein; and a magnet disposed in the housing so as to face the coil in a second direction perpendicular to the first direction, wherein the magnet is fixed to the housing, and the material of the housing is a magnetic material.

A further mode of the linear actuator may be as follows: the linear actuator has: a movable member movable in a predetermined first direction; and a housing that accommodates the movable element therein, the housing having a guide portion that guides movement of the movable element in the first direction. In another embodiment of the linear actuator, the following structure may be adopted: the housing has an opposing surface that faces the movable element in a second direction perpendicular to the first direction, and the guide portion has a guide surface that is disposed closer to the movable element than the opposing surface in the second direction, and the movable element is in contact with the guide surface and is in a state of opposing the opposing surface with a gap therebetween in the second direction.

The application of the linear actuator to which the present invention is applied is not particularly limited. The linear actuator may be mounted on any device. The structures and methods described in the present specification can be appropriately combined within a range not contradicting each other.

[ Additionally remembered ]

(Additionally, 1)

A linear actuator, having:

A movable element movable in a predetermined first direction, the movable element including a movable element main body and a coil attached to the movable element main body;

A magnet disposed opposite to the coil in a second direction perpendicular to the first direction;

An elastic member that elastically deforms in response to movement of the movable element in the first direction, and applies a force in the first direction to the movable element; and

A wiring member having flexibility and electrically connected to the coil at one side of the movable element main body in the second direction,

The wiring member extends from one side of the second direction of the movable element body to the other side of the second direction of the movable element body through one side of the first direction of the movable element body, and is led out from the other side of the second direction of the movable element body in a direction intersecting the first direction.

(Additionally remembered 2)

The linear actuator according to appendix 1, wherein,

The wiring member has:

a first extension portion located at one side of the second direction of the movable body and extending in the first direction;

A second extending portion that clamps the movable element main body in the second direction between the second extending portion and the first extending portion, and extends in the first direction;

A first connecting portion that connects an end portion of the first extending portion on one side in the first direction and an end portion of the second extending portion on one side in the first direction; and

And a third extension portion extending from an end portion of the second extension portion on the other side in the first direction in a direction intersecting the first direction.

(Additionally, the recording 3)

The linear actuator according to appendix 2, wherein,

The third extension portion extends from an end portion of the second extension portion on the other side in the first direction in a direction perpendicular to the first direction.

(Additionally remembered 4)

The linear actuator according to supplementary note 3, wherein,

The third extension portion extends from an end portion of the second extension portion on the other side in the first direction in a third direction perpendicular to both the first direction and the second direction.

(Additionally noted 5)

A linear actuator, having:

A movable member movable in a predetermined first direction; and

A housing that accommodates the movable element therein;

The housing has a guide portion that guides movement of the movable member in the first direction.

(Additionally described 6)

The linear actuator according to supplementary note 5, wherein,

The guide portion extends in the first direction,

The position in the first direction of the entire guide portion is included in the position in the first direction of the movable element within the movement range in the first direction of the movable element.

(Additionally noted 7)

The linear actuator according to supplementary note 5 or supplementary note 6, wherein,

The housing has:

a first wall portion located in a second direction perpendicular to the first direction; and

A pair of second wall portions respectively located on both sides of a third direction perpendicular to both the first direction and the second direction,

The guide portions are provided at corners of the first wall portion and the pair of second wall portions, respectively, and are located further toward the inside of the housing than the pair of second wall portions.

(Additionally noted 8)

The linear actuator of appendix 7, wherein,

The housing has a hole portion provided in a part of the first direction in the edge portion of the third direction in the first wall portion,

The guide portion is connected to a first edge portion located in the third direction among inner edge portions of the hole portion.

(Additionally, the mark 9)

The linear actuator of appendix 8, wherein,

The guide portion protrudes obliquely from the first edge portion to one side of the second direction and in the third direction toward the second wall portion.

(Additionally noted 10)

The linear actuator according to appendix 8 or appendix 9, wherein,

Two ends of the guide portion in the first direction are disposed with a gap between a pair of second edge portions located on both sides of the first direction in the first direction from among inner edge portions of the hole portion.

(Additionally noted 11)

The linear actuator according to any one of supplementary notes 7 to 10, wherein,

The housing has a rectangular parallelepiped box shape extending in the first direction,

The guide portions are provided at four corners of the housing, respectively, when viewed in the first direction.

(Additional recording 12)

The linear actuator according to supplementary note 5 or supplementary note 6, wherein,

The movable member has a guided recess extending in the first direction,

The guide portion is fitted in the guided recess.

(Additional recording 13)

The linear actuator according to any one of supplementary notes 5 to 12, wherein,

The guide portion includes a pair of guide portions arranged so as to sandwich the movable member in a vertical direction perpendicular to the first direction, and a pair of guide portions arranged so as to sandwich the movable member in a direction perpendicular to both the first direction and the vertical direction.

(Additional recording 14)

The linear actuator according to any one of supplementary notes 5 to 13, wherein,

The housing has a housing body to which the guide portion is mounted,

The guide portion is made of a material different from that of the housing main body.

(Additional recording 15)

The linear actuator of appendix 14, wherein,

The material constituting the housing body is a metal,

The material constituting the guide portion is resin.

(Additionally remembered 16)

The linear actuator according to any one of supplementary notes 5 to 15, wherein,

The housing has an opposing surface opposing the movable element in a crossing direction crossing the first direction,

The guide portion has a guide surface disposed closer to the movable element than the opposing surface in the intersecting direction,

The movable element is in contact with the guide surface and is in a state of facing the facing surface with a gap therebetween in the intersecting direction.

Claims (9)

1. A linear actuator, having:

A movable element movable in a predetermined first direction, the movable element including a movable element main body and a coil attached to the movable element main body;

A magnet disposed opposite to the coil in a second direction perpendicular to the first direction;

An elastic member that elastically deforms in response to movement of the movable element in the first direction, and applies a force in the first direction to the movable element; and

A wiring member having flexibility and electrically connected to the coil at one side of the movable element main body in the second direction,

The wiring member extends from one side of the second direction of the movable element body to the other side of the second direction of the movable element body through one side of the first direction of the movable element body, and is led out from the other side of the second direction of the movable element body to one side of the first direction than the movable element body,

The wiring member has:

a first extension portion located at one side of the second direction of the movable body and extending in the first direction;

A second extension portion that clamps the movable element main body in the second direction between the second extension portion and the first extension portion, and extends in the first direction;

A first connecting portion that connects an end portion of the first extending portion on one side in the first direction and an end portion of the second extending portion on one side in the first direction;

A third extension portion which is arranged in a row with the second extension portion in a third direction perpendicular to both the first direction and the second direction, and which is led out to one side of the first direction than the movable element main body; and

And a second connecting portion connecting an end portion of the second extending portion on the other side in the first direction and an end portion of the third extending portion on the other side in the first direction.

2. The linear actuator of claim 1, wherein,

The first connecting portion is a portion bent toward the other side of the second direction with respect to the first extending portion,

The first extension portion has a wide portion having a width larger than that of the first connection portion.

3. The linear actuator of claim 1, wherein,

The linear actuator further has:

A housing that accommodates the movable element therein; and

A damper member fixed to an inner wall surface of the housing and facing the movable element main body in the first direction,

The damping member includes a damping member located on one side of the first direction of a portion of the movable element main body that overlaps the third extension when viewed in the second direction.

4. The linear actuator of claim 1, wherein,

The wiring member has:

a coil connection part electrically connected to the coil;

a fourth extension portion located at one side of the second direction of the movable body and extending in the first direction;

a fifth extension portion that sandwiches the movable element main body in the second direction between the fifth extension portion and the fourth extension portion, and extends in the first direction;

a third connecting portion connecting an end portion of the fourth extending portion on the side of the first direction and an end portion of the fifth extending portion on the side of the first direction; and

A fourth connecting portion connecting an end portion of the other side of the first direction in the fifth extending portion and an end portion of the other side of the first direction in the third extending portion,

The first extension portion and the fourth extension portion are arranged at intervals along the third direction and extend from the coil connecting portion to one side of the first direction.

5. The linear actuator of claim 1, wherein,

The wiring member has:

a first coil connection portion electrically connected to the coil on one side of the movable element main body in the second direction; and

And a second coil connection part electrically connected to the coil on the other side of the second direction of the movable body.

6. The linear actuator of claim 5, wherein,

The first extension portion extends from the first coil connecting portion to one side in the first direction,

The wiring member has:

a sixth extension portion extending from the second coil connection portion to one side in the first direction; and

And a fifth connecting portion connecting an end portion of the first extending portion on one side in the first direction and an end portion of the sixth extending portion on one side in the first direction.

7. The linear actuator of claim 1, wherein,

The elastic member is a coil spring.

8. The linear actuator of claim 7, wherein,

The elastic member includes a pair of elastic members located at one side of the first direction of the movable body,

The pair of elastic members are disposed so as to sandwich the wiring member in a third direction perpendicular to both the first direction and the second direction.

9. The linear actuator of claim 1, wherein,

The wiring member has a shape of a belt,

The width direction of the wiring member is a third direction perpendicular to both the first direction and the second direction.