CN113906245A - Actuator - Google Patents

Abstract

The actuator includes a driving mechanism, a driven member extending in a 1 st direction, a 1 st locking mechanism, a 2 nd locking mechanism, and a releasing mechanism, wherein the 1 st locking mechanism is configured to: the drive mechanism is configured to lock the driven member when moving in the 1 st direction by driving the drive mechanism, thereby moving the driven member in the 1 st direction, and is configured to: releasing the locking of the driven member when the driven member moves in a 2 nd direction, which is a direction opposite to the 1 st direction, in association with a stop of driving of the driving mechanism, wherein the 2 nd locking mechanism is configured to: the releasing mechanism is configured to lock the driven member to be moved in the 2 nd direction and restrict the movement of the driven member in the 2 nd direction, and the releasing mechanism is configured to: and releasing the locking of the driven member by the 1 st locking mechanism and the 2 nd locking mechanism.

Description

Actuator

Technical Field

The present invention relates to an actuator.

Background

Patent document 1 discloses an actuator that drives a parking lock mechanism of a vehicle. The actuator converts the rotary motion of the motor into linear motion via a worm gear. Patent document 2 discloses an actuator that drives a parking lock mechanism of a vehicle, which converts a rotational motion of an electric motor into a linear motion through a ball screw. Patent document 3 discloses a clutch device for a vehicle in which a plunger is moved by excitation of an electromagnet as an example of an actuator for reciprocating a driven member.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012 and 72854

Patent document 2: japanese laid-open patent publication No. 2006-322489

Patent document 3: japanese patent No. 5580020

Disclosure of Invention

Problems to be solved by the invention

The actuators of patent documents 1 and 2 have the following advantages: the moving distance of the driven member can be easily adjusted, and particularly, the moving distance of the driven member can be easily increased. However, the actuators of patent documents 1 and 2 have problems that they are expensive and easily large.

The actuator of patent document 3 has the following problems: the adjustment of the moving distance of the driven member is difficult, and particularly when the moving distance of the driven member is to be increased, the apparatus becomes large.

The purpose of the present disclosure is to provide an actuator capable of increasing the moving distance of a driven member without increasing the size of the device.

Means for solving the problems

The summary described herein is provided to introduce a simplified form to further details described below in the detailed description. This summary is not intended to identify key features or essential features of the contents described in the claims, nor is it intended to be used as an aid in determining the scope of the contents described in the claims.

An actuator for solving the above problems includes: a drive mechanism; a driven member extending in a 1 st direction; a 1 st locking mechanism configured to: the drive mechanism is configured to lock the driven member when moving in the 1 st direction by driving the drive mechanism, thereby moving the driven member in the 1 st direction, and is configured to: releasing the locking of the driven member when the driven member moves in a 2 nd direction, which is a direction opposite to the 1 st direction, in association with the stop of the driving mechanism; a 2 nd lock mechanism configured to: locking the driven member to be moved in the 2 nd direction, and restricting the movement of the driven member in the 2 nd direction; and a release mechanism configured to: and releasing the locking of the driven member by the 1 st locking mechanism and the 2 nd locking mechanism.

Drawings

Fig. 1 is a sectional view showing an initial state of an actuator of embodiment 1.

Fig. 2 is a sectional view of the actuator of fig. 1 when the 1 st locking mechanism locks the driven member.

Fig. 3 is a sectional view of the actuator of fig. 2 when the 2 nd locking mechanism locks the driven member.

Fig. 4 is a sectional view of the driven member of fig. 3 when the lock is released.

Fig. 5 is a sectional view of the actuator of embodiment 2.

Fig. 6 is a sectional view of the actuator of embodiment 3.

Fig. 7 is a partially enlarged view of fig. 6.

Fig. 8 is a sectional view of the actuator of embodiment 4.

Fig. 9 is a sectional view illustrating the operation of the actuator of fig. 8.

Fig. 10 is a sectional view of the actuator of embodiment 5.

Fig. 11 is a cross-sectional view showing a modification of the 1 st locking mechanism provided in the actuator of fig. 1.

Fig. 12 is a cross-sectional view showing a modification of the 2 nd locking mechanism provided in the actuator of fig. 1.

Detailed Description

The drawings may not be to scale, and relative sizes, ratios and depictions of elements in the drawings may be exaggerated for clarity or illustration.

(embodiment 1)

The actuator 11 according to embodiment 1 will be described with reference to fig. 1 to 4.

As shown in fig. 1, the actuator 11 includes a driven member 12 extending in the 1 st direction D1, a driving mechanism 30, a lock device 40, and a release mechanism 90. The actuator 11 may further include a biasing mechanism 15. The biasing mechanism 15 is configured to bias the driven member 12 in a 2 nd direction D2 which is a direction opposite to the 1 st direction D1.

The actuator 11 of the present embodiment can be applied to, for example, a parking lock mechanism mounted on a vehicle. The parking lock mechanism is configured to: the output shaft of the transmission is switched between a parking lock state in which the output shaft is locked and a lock release state in which the output shaft is not locked by reciprocating the driven member 12.

An example of the driven member 12 is a columnar driven shaft extending along the axis X, but the shape of the driven member 12 is not particularly limited. The actuator 11 is constituted by: the driven member 12 is reciprocated in a 1 st direction D1 (rightward in fig. 1) and a 2 nd direction D2 (leftward in fig. 1) along the axis X.

The drive mechanism 30 includes a generally cylindrical housing 31, a drive solenoid 32 housed in the housing 31, and a drive shaft 33. The driving solenoid 32 includes, for example, a coil 34, a fixed core 35, and a movable core 36. The fixed core 35 and the movable core 36 are cylindrical magnetic bodies, and are disposed radially inward of the coil 34. The drive shaft 33 is fixed to the inner circumferential surface of the movable iron core 36 so as to be movable integrally with the movable iron core 36. A bearing 37 may be disposed on the inner peripheral surface of the fixed core 35, and the drive shaft 33 may be supported by the bearing 37 so as to be slidable.

Fig. 1 shows the actuator 11 in an initial state. The positions of the components of the actuator 11 in the initial state are referred to as initial positions. In the initial state, when the coil 34 is energized, magnetic flux is generated, and the movable iron core 36 is attracted toward the fixed iron core 35. Thus, when the coil 34 is energized, that is, when the driving mechanism 30 is driven, the driving shaft 33 moves in the 1 st direction D1. After the coil 34 is energized, that is, after the driving of the driving mechanism 30 is stopped, the driving shaft 33 is configured to move in the 2 nd direction D2 and return to the initial position.

The locking device 40 includes the 1 st and 2 nd locking mechanisms 50 and 60, the 1 st retaining member 70, the 2 nd retaining member 80, and the 1 st biasing member 14 arranged along the 1 st direction D1. The 1 st and 2 nd holding members 70 and 80 have a cylindrical shape as a whole. The 1 st urging member 14 is, for example, a coil spring having a 1 st end and a 2 nd end.

The 1 st holding member 70 holds the 1 st locking mechanism 50. The 1 st holding member 70 is disposed to be capable of reciprocating along the driven member 12. More specifically, the 1 st holding member 70 is housed inside the 2 nd holding member 80 so as to be movable relative to the housing 31 and the 2 nd holding member 80 in the 1 st direction D1.

The 2 nd holding member 80 is immovably arranged between the drive mechanism 30 and the release mechanism 90. The 2 nd holding member 80 holds the 2 nd locking mechanism 60 at a position apart from the 1 st locking mechanism 50, more specifically, between the 1 st locking mechanism 50 and the releasing mechanism 90.

The 1 st biasing member 14 biases the 1 st holding member 70 in the 2 nd direction D2. The 1 st holding member 70 may have a 1 st locking portion 71 that engages with the 1 st end of the 1 st biasing member 14, and the 2 nd holding member 80 may have a 2 nd locking portion 81 that engages with the 2 nd end of the 1 st biasing member 14.

The 1 st holding member 70 has a 1 st peripheral wall 72, an end wall 73 as a 1 st end in the axial direction of the 1 st peripheral wall 72, and an open end 74 as a 2 nd end in the axial direction of the 1 st peripheral wall 72. The 2 nd holding member 80 has a 2 nd peripheral wall 82, a 1 st open end 83 as a 1 st end in the axial direction of the 2 nd peripheral wall 82, and a 2 nd open end 84 as a 2 nd end in the axial direction of the 2 nd peripheral wall 82. The base end (left end in fig. 1) of the driven member 12 is located inside the 1 st holding member 70.

The end wall 73 may have a protrusion 75 protruding toward the driving solenoid 32. In the initial state, the projection 75 of the 1 st holding member 70 is in contact with the tip end (right end in fig. 1) of the drive shaft 33 by the urging force of the 1 st urging member 14. In the initial state, the drive shaft 33 and the movable iron core 36 are arranged at the initial positions shown in fig. 1 by the biasing force of the 1 st biasing member 14.

The 1 st locking mechanism 50 includes a 1 st retaining ring 51, one or more 1 st rolling elements 52, and a 1 st fixing ring 53. Each 1 st rolling element 52 can roll along the driven member 12. The 1 st retaining ring 51 and the 1 st securing ring 53 are disposed so as to surround the outer periphery of the driven member 12. The 1 st retaining ring 51 and the 1 st securing ring 53 are fixed to the inner peripheral surface of the 1 st peripheral wall 72.

The one or more 1 st rolling elements 52 are arranged between the 1 st retaining ring 51 and the driven member 12 so as to be aligned in the circumferential direction of the driven member 12. The 1 st fixing ring 53 is fixed to the vicinity of the opening end 74 of the 1 st holding member 70 so as to block one or more 1 st rolling elements 52 from reaching the outer surface of the 1 st holding member 70.

The 1 st retaining ring 51 has a 1 st engaging portion 54 engageable with one or more 1 st rolling elements 52. The 1 st engaging portion 54 is configured to: when the 1 st locking mechanism 50 is about to move in the 1 st direction D1, one or more 1 st rolling elements 52 are engaged between the 1 st engagement portion 54 and the driven member 12. Thus, the 1 st locking mechanism 50 is referred to as a 1 st locking mechanism 50 for locking the driven member 12 by engaging the 1 st rolling element 52 between the driven member 12 and the 1 st engagement portion 54. The unlocking of the driven member 12 is referred to as the 1 st rolling element 52 falling out from between the driven member 12 and the 1 st engagement portion 54 so that the 1 st rolling element 52 can roll.

One example of the 1 st engaging portion 54 is an annular inclined surface inclined so as to be separated from the driven member 12 in the 1 st direction D1. Instead of the 1 st retaining ring 51, the 1 st engaging portion 54 may be provided, so that the 1 st retaining member 70 has the 1 st engaging portion 54.

The 2 nd locking mechanism 60 includes a 2 nd retaining ring 61, one or more 2 nd rolling elements 62, and a 2 nd fixing ring 63. Each 2 nd rolling element 62 can roll along the driven member 12. The 2 nd retaining ring 61 and the 2 nd securing ring 63 are disposed so as to surround the outer periphery of the driven member 12. The 2 nd retaining ring 61 and the 2 nd securing ring 63 are fixed to the inner peripheral surface of the 2 nd peripheral wall 82.

The one or more 2 nd rolling elements 62 are arranged between the 2 nd retaining ring 61 and the driven member 12 so as to be aligned in the circumferential direction of the driven member 12. The 2 nd fixing ring 63 is fixed to the vicinity of the 2 nd opening end 84 of the 2 nd holding member 80 so as to block one or more 2 nd rolling elements 62 from reaching the outer surface of the 2 nd holding member 80.

The 2 nd retaining ring 61 has a 2 nd engaging portion 64 engageable with one or more 2 nd rolling elements 62. The 2 nd engaging portion 64 is configured to: when the driven member 12 is going to move in the 2 nd direction D2, one or more 2 nd rolling elements 62 are engaged between the 2 nd engaging portion 64 and the driven member 12. Thus, the engagement of the 2 nd rolling elements 62 between the driven member 12 and the 2 nd engagement portion 64 is referred to as a 2 nd locking mechanism 60 for locking the driven member 12. The release of the 2 nd rolling elements 62 from between the driven member 12 and the 2 nd engaging portion 64 to allow the 2 nd rolling elements 62 to roll is referred to as the unlocking of the driven member 12.

One example of the 2 nd engaging portion 64 is an annular inclined surface inclined so as to be apart from the driven member 12 in the 1 st direction D1. Instead of the 2 nd retaining ring 61, the 2 nd engaging portion 64 may be provided, so that the 2 nd retaining member 80 has the 2 nd engaging portion 64.

The release mechanism 90 is configured to release the locking of the driven member 12 by the 1 st and 2 nd locking mechanisms 50 and 60. The release mechanism 90 includes, for example, a housing 91, a release driving portion 92, a cylindrical release member 93, and a 2 nd urging member 97. The releasing drive unit 92 is configured to move the releasing member 93 in the 1 st direction D1 when driven. In the present embodiment, the driving mechanism 30, the 1 st locking mechanism 50, the 2 nd locking mechanism 60, and the releasing driving unit 92 are arranged in this order along the 1 st direction D1.

The release member 93 is configured to: when moving in the 1 st direction D1, the 1 st and 2 nd rolling elements 52, 62 are disengaged from the 1 st and 2 nd engagement portions 54, 64, respectively. The driven member 12, the 1 st locking mechanism 50 (the 1 st engaging portion 54), the 2 nd locking mechanism 60 (the 2 nd engaging portion 64), and the releasing member 93 are preferably coaxially arranged. The releasing member 93 is disposed between the 1 st and 2 nd retaining rings 51 and 61 and the driven member 12 so as to be slidable in the 1 st direction D1.

The tip (left end in fig. 1) of the releasing member 93 enters the inside of the 1 st holding member 70. The release member 93 has one or more 1 st through holes 98 and one or more 2 nd through holes 99. Each 1 st through hole 98 accommodates a corresponding one of the 1 st rolling elements 52 so as to be capable of rolling. Each 2 nd through hole 99 rollably houses a corresponding one of the 2 nd rolling elements 62. The 1 st and 2 nd through holes 98 and 99 are, for example, long holes extending in the 1 st direction D1. The 1 st and 2 nd through holes 98 and 99 regulate the movement of the 1 st and 2 nd rolling elements 52 and 62 in the circumferential direction of the driven member 12, respectively.

The release driving unit 92 is, for example, a release solenoid, and includes a coil 94, a fixed core 95, and a movable core 96. The fixed core 95 and the movable core 96 are cylindrical magnetic bodies. The release member 93 has a base end portion (right end in fig. 1) engaged with the movable core 96. The base end portion may be a flange that engages with the movable core 96. The 2 nd urging member 97 urges the movable iron core 96 in the 2 nd direction D2. In the initial state, the movable core 96 is disposed at the initial position shown in fig. 1 by the biasing force of the 2 nd biasing member 97.

When the coil 94 is energized, that is, when the release driving unit 92 is driven, the movable core 96 moves in the 1 st direction D1 against the biasing force of the 2 nd biasing member 97. After the coil 94 is energized, that is, after the driving of the release driving unit 92 is stopped, the movable core 96 is moved in the 2 nd direction D2 by the biasing force of the 2 nd biasing member 97, and is returned to the initial position.

When the release member 93 moves in the 1 st direction D1 together with the movable core 96, the 1 st and 2 nd rolling elements 52 and 62 are pressed by the release member 93 through the 1 st and 2 nd through holes 98 and 99, respectively, and move in the 1 st direction D1. Thereby, the engagement between the 1 st and 2 nd rolling elements 52, 62 and the 1 st and 2 nd engaging portions 54, 64 is released, respectively.

The biasing mechanism 15 may include a 3 rd biasing member 16 for biasing the driven member 12 in the 2 nd direction D2, and a cylindrical housing 17 for housing the 3 rd biasing member 16. The 1 st end (left end in fig. 1) of the housing 17 is fixed to the case 91. The 1 st end of the housing 17 is an open end, and the 1 st end (left end in fig. 1) of the 3 rd urging member 16 enters the case 91 through the open end. The 2 nd end (right end in fig. 1) of the housing 17 is an open end through which the tip end (right end in fig. 1) of the driven member 12 protrudes outside the housing 17.

The 3 rd urging member 16 is, for example, a coil spring. The 3 rd biasing member 16 has a 1 st end (left end in fig. 1) that engages with the driven member 12 and a 2 nd end (right end in fig. 1) that engages with the housing 17. The driven member 12 may have an engaging member 18 for engaging with the 1 st end of the 3 rd urging member 16.

In the initial state, the base end (left end in fig. 1) of the driven member 12 is brought into contact with the end wall 73 of the 1 st holding member 70 by the urging force of the 3 rd urging member 16. That is, the end wall 73 defines an initial position of the driven member 12. In order to define the initial position of the driven member 12, a flange for engaging with the distal end surface (right end surface in fig. 1) of the housing 17 may be provided at the distal end (right end surface in fig. 1) of the driven member 12. In this case, in the initial state, the base end of the driven member 12 may not be in contact with the end wall 73.

Next, the operation of embodiment 1 will be described.

As shown in fig. 1, when the actuator 11 is in the initial state and the drive mechanism 30 is driven, the movable iron core 36, the drive shaft 33, and the 1 st holding member 70 are to be moved in the 1 st direction D1 against the biasing force of the 1 st biasing member 14.

Then, as shown in fig. 2, the 1 st locking mechanism 50 locks the driven member 12, and the movement of the 1 st holding member 70 is transmitted to the driven member 12. As a result, the movable iron core 36, the drive shaft 33, the 1 st holding member 70, and the driven member 12 move in the 1 st direction D1 against the biasing forces of the 1 st biasing member 14 and the 3 rd biasing member 16. In fig. 2, the driven member 12 and the movable core 36 after the movement are shown by solid lines, and the driven member 12 and the movable core 36 at the initial positions are shown by two-dot chain lines. When the driven member 12 moves in the 1 st direction D1, the 2 nd rolling elements 62 roll in the 2 nd through-hole 99, and the 2 nd locking mechanism 60 allows the movement of the driven member 12.

When the driving of the driving mechanism 30 is stopped, as shown in fig. 3, the movable iron core 36, the driving shaft 33, and the 1 st holding member 70 are moved in the 2 nd direction D2 by the biasing force of the 1 st biasing member 14, and return to the initial positions. In this way, the 1 st holding member 70 and the 1 st locking mechanism 50 are configured to move in the 1 st direction D1 by the driving of the driving mechanism 30 and configured to move in the 2 nd direction D2, which is the opposite direction of the 1 st direction D1, along with the stopping of the driving mechanism 30.

After the driving of the driving mechanism 30 is stopped, the driven member 12 is also moved in the 2 nd direction D2 by the biasing force of the 3 rd biasing member 16, but the 2 nd rolling elements 62 are engaged between the 2 nd engaging portion 64 and the driven member 12, and the movement of the driven member 12 in the 2 nd direction D2 is restricted. In this way, the 2 nd locking mechanism 60 is configured to allow the driven member 12 to move in the 1 st direction D1, and is configured to: the driven member 12 to be moved in the 2 nd direction D2 is locked to limit movement of the driven member 12 in the 2 nd direction D2.

The 1 st holding member 70 and the 1 st locking mechanism 50 move in the 2 nd direction D2, and the 1 st rolling elements 52 and the 1 st engagement portions 54 are disengaged from each other. Therefore, after the drive of the drive mechanism 30 is stopped, the 1 st rolling elements 52 roll, and relative movement of the 1 st holding member 70 with respect to the driven member 12 is permitted. In this way, the 1 st locking mechanism 50 is configured to: the driven member 12 is moved in the 1 st direction D1 by locking the driven member 12 when moved in the 1 st direction D1, and the locking of the driven member 12 is released when moved in the 2 nd direction D2.

Next, when the 2 nd driving of the driving mechanism 30 is performed, the driven member 12 moves in the 1 st direction D1 in the same manner as in the 1 st driving. When the 2 nd driving is stopped, the 1 st holding member 70 and the 1 st locking mechanism 50 move in the 2 nd direction D2 and return to the initial positions.

Thus, each time the driving mechanism 30 is driven, the driven member 12 moves a certain distance in the 1 st direction D1. Therefore, the driven member 12 can be moved to the target position by intermittently driving the driving mechanism 30a plurality of times.

After the driven member 12 has moved to the target position, the release driving portion 92 of the release mechanism 90 is driven. Then, as shown in fig. 4, the movable iron core 96 and the release member 93 move in the 1 st direction D1 against the biasing force of the 2 nd biasing member 97.

When the release member 93 moves in the 1 st direction D1, the engagement between the 2 nd rolling elements 62 and the 2 nd engagement portions 64 is released, and the engagement between the 1 st rolling elements 52 and the 1 st engagement portions 54 is released. Thereby, the 1 st and 2 nd locking mechanisms 50 and 60 simultaneously release the locking of the driven member 12.

When the lock of the driven member 12 is released, the driven member 12 moves in the 2 nd direction D2 by the biasing force of the 3 rd biasing member 16, and returns to the initial position. When the driving of the release driving unit 92 is stopped, the movable core 96 and the release member 93 return to the initial positions by the biasing force of the 2 nd biasing member 97.

In embodiment 1, the following effects can be obtained.

(1) The driven member 12 can be intermittently moved a plurality of times in the 1 st direction D1 by alternately locking the driven member 12 with the 1 st locking mechanism 50 moving in the 1 st direction D1 and the 2 nd locking mechanism 60 fixedly disposed. Therefore, the moving distance of the driven member 12 can be increased without increasing the size of the apparatus.

For example, although the moving distance of the driven member 12, i.e., 1 stroke, is generally several mm when the primary driving solenoid 32 is driven, the actuator 11 needs to move the driven member 12 several tens of mm when applied to the parking lock mechanism. When the 1 stroke of the driven member 12 is increased in this way, the driving solenoid 32 needs to be increased in size.

When the driven member 12 is moved to the target position by 1 stroke, the design of the entire apparatus needs to be changed in order to change the moving distance of the driven member 12. In this respect, the actuator 11 of the present embodiment can easily change the moving distance of the driven member 12 by changing the number of times the driving mechanism 30 is driven.

(2) Since the 1 st lock mechanism 50 is movable in the 1 st direction D1, the 1 st engagement portion 54 and the 1 st rolling element 52 can transmit the movement of the 1 st holding member 70 in the 1 st direction D1 to the driven member 12. Therefore, the 1 st holding member 70 and the driven member 12 can be interlocked with each other with a simple structure.

(3) The 2 nd locking mechanism 60 can restrict the movement of the driven member 12 in the 2 nd direction D2 by the 2 nd rolling elements 62 and the 2 nd engaging portion 64. Since the 2 nd locking mechanism 60 fixedly disposed in this way functions as a stopper of the driven member 12, the same configuration as the 1 st locking mechanism 50 can be provided, but the function is different from that of the 1 st locking mechanism 50.

(4) The unlocking mechanism 90 unlocks the driven member 12, and the driven member 12 can repeatedly perform the forward movement in the 1 st direction D1 and the return movement in the 2 nd direction D2.

(5) The releasing member 93 simultaneously releases the meshing of the 1 st and 2 nd rolling elements 52, 62, and therefore, the driven member 12 can be returned to the initial position.

(6) Since the driving mechanism 30 (or the driving shaft 33), the driven member 12 (or the driven shaft), the 1 st locking mechanism 50 (or the 1 st engaging portion 54), the 2 nd locking mechanism 60 (or the 2 nd engaging portion 64), and the releasing member 93 are coaxially located, the driven member 12 can be returned to the initial position by the movement of one releasing member 93.

(7) The driven member 12 can be returned to the initial position more reliably by the urging force of the 3 rd urging member 16 regardless of the posture of the actuator 11.

(embodiment 2)

Fig. 5 shows an actuator 11A according to embodiment 2. The actuator 11A is different from the actuator 11 of embodiment 1 in part.

The actuator 11A has a drive mechanism 30A, and the drive mechanism 30A includes a lock mechanism. In more detail, the 1 st holding member of embodiment 2 is the movable iron core 36 of the drive mechanism 30A, and the movable iron core 36 holds the 1 st locking mechanism 50.

In embodiment 2, the 2 nd locking mechanism 60, the 1 st locking mechanism 50, and the releasing drive unit 92 are arranged in this order along the 1 st direction D1. The housing 31A of the drive mechanism 30A has a holding portion 38 that holds the 2 nd locking mechanism 60. That is, the 2 nd holding member of embodiment 2 is the housing 31A.

The holding portion 38 may be an end wall that becomes the 1 st end (left end in fig. 5) of the cylindrical case 31A. The end wall of the holding portion 38 may have a through hole through which the driven member 12 can be inserted. The driven member 12 may protrude from the housing 31A in the 2 nd direction D2 through the through hole. When the driven member 12 is thus lengthened, the moving distance of the driven member 12 can be made longer. In this case, the driving mechanism 30A may further include a housing portion 39 that houses a base end (left end in fig. 5) of the driven member 12.

The substrate 41 may be disposed in the housing 39. The base plate 41 may also have a sensor 42 for detecting the position of the driven member 12. The actuator 11A may have a control unit 43 for controlling the driving solenoid 32 and the releasing driving unit 92 based on the detection result of the sensor 42. The control unit 43 may have another mechanism (e.g., a parking lock mechanism or a vehicle) instead of the actuator 11A.

The control unit 43 may be configured as one or more dedicated hardware circuits including one or more processors that operate in accordance with a computer program (software), dedicated hardware (application specific integrated circuit: ASIC) that executes at least a part of various processes, or a combination of those circuits (circuits). The processor includes a CPU, and memories such as a RAM and a ROM, and the memories store program codes or instructions configured to cause the CPU to execute processing. Memory or computer-readable media includes all available media that can be accessed by a general purpose or special purpose computer.

The housing 17A according to embodiment 2 may be made of a magnetic material. In this case, even if the release mechanism 90 does not have a dedicated fixed core, a part (left end in fig. 5) of the housing 17A as a magnetic body functions as the fixed core 95. This reduces the number of components.

The case 91A of the release mechanism 90A may be a magnetic body. The housing 91A may further include a ring-shaped fixed core 35 protruding in the 2 nd direction D2. In this case, even if the driving solenoid 32 does not have a dedicated fixed core, a part of the case 91A, which is a magnetic body, functions as the fixed core 35. This reduces the number of components.

The housing 91A may have a cylindrical peripheral wall 100 and an end wall 101 as the 1 st end (left end in fig. 5) of the peripheral wall 100. In this case, the fixed core 35 may protrude from the end wall 101 of the case 91A in the 2 nd direction D2. The end wall 101 has a through hole through which the driven member 12 can be inserted.

The release member 93 of embodiment 2 has a distal end (left end in fig. 5) housed in the case 31A, and a flange as a proximal end (right end in fig. 5) fixed to the movable iron core 96. The 1 st and 2 nd through holes 98 and 99 of the releasing member 93 are disposed in the housing 31A.

The 1 st biasing member 14 according to embodiment 2 may have a 1 st end (left end in fig. 5) that engages with the 1 st fixed ring 53 or the movable iron core 36, and a 2 nd end (right end in fig. 5) that engages with the end wall 101.

The 1 st and 2 nd fixing rings 53 and 63 may have plate springs protruding into the 1 st and 2 nd through holes 98 and 99, respectively. Each leaf spring protruding into the 1 st through hole 98 lightly biases the corresponding 1 st rolling element 52 toward the 1 st engagement portion 54. Thus, the backlash between the 1 st rolling elements 52 and the 1 st engaging portion 54 and the driven member 12 is reduced after the movable iron core 36 starts moving in the 1 st direction D1.

Each leaf spring protruding into the 2 nd through hole 99 lightly biases the corresponding 2 nd rolling element 62 toward the 2 nd engagement portion 64. Thus, the backlash between the driven member 12 and the 2 nd rolling element 62 meshing with the 2 nd engaging portion 64 and the driven member 12 is reduced after the driven member 12 starts moving in the 2 nd direction D2.

Next, the operation of embodiment 2 will be described.

When the actuator 11A is in the initial state, the movable iron core 36 is to be moved in the 1 st direction D1 against the urging force of the 1 st urging member 14 when the driving mechanism 30A is driven. Then, the 1 st rolling elements 52 are engaged between the 1 st engagement portion 54 and the driven member 12, and the movement of the movable iron core 36 is transmitted to the driven member 12 through the 1 st rolling elements 52. As a result, the movable iron core 36 and the driven member 12 move in the 1 st direction D1 against the biasing forces of the 1 st biasing member 14 and the 3 rd biasing member 16. When the driven member 12 moves in the 1 st direction D1, the 2 nd rolling elements 62 roll in the 2 nd through-hole 99, and the 2 nd locking mechanism 60 allows the movement of the driven member 12.

When the driving of the driving mechanism 30A is stopped, the movable iron core 36 is moved in the 2 nd direction D2 by the biasing force of the 1 st biasing member 14, and returns to the initial position. In this way, the movable core 36 as the 1 st holding member is configured to move in the 1 st direction D1 when the driving mechanism 30A is driven, and is configured to move in the 2 nd direction D2 after the driving of the driving mechanism 30A is stopped.

After the driving of the driving mechanism 30A is stopped, the driven member 12 also moves in the 2 nd direction D2 together with the movable iron core 36, but the 2 nd rolling elements 62 bite between the 2 nd engaging portion 64 and the driven member 12, and the movement of the driven member 12 in the 2 nd direction D2 is restricted.

When the movable iron core 36 and the 1 st lock mechanism 50 move in the 2 nd direction D2, the 1 st rolling elements 52 and the 1 st engagement portions 54 are disengaged from each other. Therefore, the 1 st rolling elements 52 roll, and relative movement of the movable iron core 36 with respect to the driven member 12 is permitted.

Next, when the 2 nd driving of the driving mechanism 30A is performed, the movable iron core 36 and the driven member 12 move in the 1 st direction D1 in the same manner as in the 1 st driving. When the 2 nd driving is stopped, the movable iron core 36 moves in the 2 nd direction D2 and returns to the initial position.

In this way, also in embodiment 2, the driven member 12 moves a certain distance in the 1 st direction D1 each time the drive mechanism 30A is driven. After the driven member 12 has moved to the target position, the cancellation driving unit 92 is driven. Then, the movable iron core 96 and the release member 93 move in the 1 st direction D1 against the biasing force of the 2 nd biasing member 97. Thereby, the 1 st and 2 nd locking mechanisms 50 and 60 release the locking of the driven member 12. Then, the driven member 12 moves in the 2 nd direction D2 by the biasing force of the 3 rd biasing member 16, and returns to the initial position.

In embodiment 2, the following effects are obtained in addition to the above-described effects (1) to (7).

(8) The movable iron core 36 as the 1 st holding member holds the 1 st locking mechanism 50 so as to be movable reciprocally, and the housing 31A as the 2 nd holding member holds the 2 nd locking mechanism 60 at a fixed position. Therefore, compared to embodiment 1 in which the 1 st and 2 nd holding members are separately prepared, the number of constituent members can be reduced. Further, the length of the actuator 11A along the 1 st direction D1 can be shortened.

(embodiment 3)

Fig. 6 and 7 show an actuator 11B according to embodiment 3. The actuator 11B is different from the actuator 11A of embodiment 2 in part.

As shown in fig. 6, the driving mechanism 30B of the actuator 11B includes a plurality of driving solenoids, for example, 1 st and 2 nd driving solenoids 32A and 32B, arranged in the 1 st direction D1.

As shown in fig. 7, the 1 st driving solenoid 32A has a coil 34A, a fixed core 35A, and a movable core 36A, and the 2 nd driving solenoid 32B has a coil 34B, a fixed core 35B, and a movable core 36B. The movable iron cores 36A, 36B function as the 1 st holding member.

The actuator 11B has the 1 st locking mechanisms 50A, 50B. The movable iron cores 36A, 36B hold the 1 st locking mechanisms 50A, 50B, respectively. The actuator 11B further includes 1 st biasing members 14A and 14B that bias the movable cores 36A and 36B in the 2 nd direction D2, respectively.

The housing 31B of the drive mechanism 30B has a holding portion 38B for holding the 2 nd lock mechanism 60 between the 1 st lock mechanisms 50A and 50B. That is, the 2 nd holding member of embodiment 3 is the housing 31B. The holding portion 38B may be a partition wall that partitions the inside of the housing 31B into two spaces arranged in the 1 st direction D1. The partition wall may have a through hole through which the driven member 12 can be inserted, and the 1 st and 2 nd driving solenoids 32A and 32B may be housed in two spaces partitioned by the partition wall.

The drive mechanism 30B may have a closing member 44 for closing an opening end which is the 1 st end (left end in fig. 7) of the cylindrical case 31B. The closing member 44 may have a through hole through which the driven member 12 can be inserted. The driven member 12 may protrude outward of the housing 31B in the 2 nd direction D2 through the through hole. The base end (left end in fig. 7) of the driven member 12 protruding from the housing 31B is preferably housed in the housing portion 39.

The case 31B may be a magnetic body in addition to the housing 17A and the case 91A. The magnetic housing 31B may have a ring-shaped fixed core 35A protruding from the holding portion 38B in the 2 nd direction D2. In this case, even if the 1 st driving solenoid 32A does not have a dedicated fixed core, a part of the case 31B (the holding portion 38B) as a magnetic body functions as the fixed core 35A. This can further reduce the number of components. The fixed core 35B protrudes from the end wall 101 of the case 91A as a magnetic body in the 2 nd direction D2.

The 1 st biasing member 14A has a 1 st end (left end in fig. 7) that engages with the 1 st fixing ring 53 of the 1 st locking mechanism 50A, and a 2 nd end (right end in fig. 7) that engages with the holding portion 38B. The 1 st biasing member 14B has a 1 st end (left end in fig. 7) that engages with the 1 st fixing ring 53 of the 1 st locking mechanism 50B, and a 2 nd end (right end in fig. 7) that engages with the end wall 101.

The release member 93B of the present embodiment has a 1 st through hole 98, a 2 nd through hole 99, and a 1 st through hole 98 that are arranged in this order along the 1 st direction D1. That is, in the 1 st direction D1, the 2 nd through-hole 99 is disposed between the two 1 st through-holes 98. The 1 st, 2 nd, and 1 st through holes 98, 99, and 98 arranged in this order in the 1 st direction D1 accommodate the 1 st, 2 nd, and 1 st rolling elements 52, 62, and 52, respectively.

Next, the operation of embodiment 3 will be described.

The 1 st and 2 nd drive solenoids 32A and 32B are alternately driven. For example, when the actuator 11B is in the initial state, the 1 st driving solenoid 32A is driven to move the driven member 12A certain distance in the 1 st direction D1. Subsequently, the driving of the 1 st driving solenoid 32A is stopped.

Subsequently, the 2 nd driving solenoid 32B is driven to further move the driven member 12 in the 1 st direction D1 by a predetermined distance. Alternatively, the driving of the 2 nd driving solenoid 32B may be started at a timing when the driving of the 1 st driving solenoid 32A is stopped (i.e., the moving direction of the movable core 36A is reversed). Then, the driving of the 2 nd driving solenoid 32B is stopped. The moving distances of the driven member 12 by the driving of the 1 st and 2 nd driving solenoids 32A and 32B may be the same or different.

After the 2 nd driving solenoid 32B stops being driven, or simultaneously with the stop of the driving, the 2 nd driving of the 1 st driving solenoid 32A is started. After the driven member 12 moves in the 1 st direction D1, the driving of the 1 st driving solenoid 32A is stopped. After the 1 st driving solenoid 32A stops being driven or simultaneously with the stop of the driving, the 2 nd driving of the 2 nd driving solenoid 32B is started.

In this way, the driving of the 1 st driving solenoid 32A and the driving of the 2 nd driving solenoid 32B can be repeated until the driven member 12 reaches the target position.

The 1 st and 2 nd driving solenoids 32A and 32B may be driven the same number of times or may be driven different from each other. Further, the 1 st and 2 nd driving solenoids 32A and 32B do not need to be alternately driven.

After the driven member 12 has moved to the target position, the coil 94 of the release driving portion 92 is energized. Then, the movable iron core 96 and the release member 93B move in the 1 st direction D1, and the meshing of all the 1 st and 2 nd rolling elements 52, 62 is released. As a result, the driven member 12 moves in the 2 nd direction D2 by the biasing force of the 3 rd biasing member 16, and returns to the initial position.

In embodiment 3, the following effects can be obtained in addition to the above-described effects (1) to (8).

(9) By alternately driving the 1 st and 2 nd drive solenoids 32A and 32B, the driven member 12 can be moved more quickly in the 1 st direction D1.

(10) In the 1 st driving solenoid 32A and the 2 nd driving solenoid 32B, when the other driving is started at the timing of stopping the one driving, the driven member 12 can be moved more quickly.

(11) In embodiment 3, the 1 st and 2 nd drive solenoids 32A and 32B may be driven simultaneously. In this case, the driven member 12 can be moved with a stronger force.

(embodiment 4)

Fig. 8 and 9 show an actuator 11C according to embodiment 4. The actuator 11C is different from the actuator 11A of embodiment 2 in part.

The actuator 11C includes a 3 rd locking mechanism 20. The 3 rd locking mechanism 20 is configured to: when the driven member 12 moves in the 1 st direction D1 and reaches the destination position, the movement of the driven member 12 is restricted.

The 3 rd lock mechanism 20 includes, for example: one or more 3 rd rolling elements 22 rollable along the driven member 12; one or more recesses 21 configured to engage with one or more 3 rd rolling elements 22; and a pressing portion 23 that presses the 3 rd rolling element 22 engaged with the concave portion 21. The driven member 12 of embodiment 4 has one or more recesses 21.

The recess 21 may be an annular groove extending in the circumferential direction of the driven member 12. Alternatively, the driven member 12 may have a plurality of recesses 21, and the plurality of recesses 21 may be a plurality of hemispherical recesses 21 that individually house the 3 rd rolling elements 22 and are arranged in the circumferential direction of the driven member 12.

The release member 93C may have one or more 3 rd through-holes 24 that receive one or more 3 rd rolling elements 22. The 3 rd through hole 24 is preferably disposed at a position apart from the 1 st and 2 nd through holes 98 and 99 in the 1 st direction D1. The 3 rd through hole 24 is, for example, a long hole extending in the 1 st direction D1. The 3 rd through hole 24 restricts movement of the 3 rd rolling element 22 in the circumferential direction of the driven member 12.

The movable core 96 of the release mechanism 90C may have the pressing portion 23. The pressing portion 23 is, for example, a protrusion having a protruding length equal to the depth of the recess 21 in the radial direction of the driven member 12. The movable core 96 preferably further includes a cylindrical portion 25 (a portion on the left side in fig. 8) and an inclined portion 26, and holds the 3 rd rolling element 22 between the cylindrical portion 25 and the driven member 12 so as to be rollable. The inclined portion 26 is, for example, a guide surface gently connecting the cylindrical portion 25 and the pressing portion 23. The inclined portion 26 is inclined so as to approach the driven member 12 in the 1 st direction D1.

The distance along the 1 st direction D1 between the concave portion 21 and the pressing portion 23 in the initial state of the actuator 11C is preferably set to be equal to the distance from the initial position of the driven member 12 to the target position.

Next, the operation of embodiment 4 will be described.

While the driven member 12 moves in the 1 st direction D1 by the driving of the driving mechanism 30A, the 3 rd rolling elements 22 roll in a space surrounded by the driven member 12, the 3 rd through-hole 24, the cylindrical portion 25, and the inclined portion 26. When the driven member 12 reaches the vicinity of the target position, the 3 rd rolling elements 22 engage with the concave portions 21. When the driven member 12 and the 3 rd rolling elements 22 slightly move in the 1 st direction D1, the driven member 12 reaches the target position.

Then, as shown in fig. 9, the pressing portion 23 presses the 3 rd rolling element 22 engaged with the concave portion 21. Thus, when the 3 rd rolling element 22 is sandwiched between the pressing portion 23 and the driven member 12, the driven member 12 is restricted from moving in the 1 st direction D1 and the 2 nd direction D2.

When the driven member 12 is returned to the initial position, the coil 94 of the release driving portion 92 is energized. Then, the movable iron core 96 moves in the 1 st direction D1, and the meshing of all the 1 st and 2 nd rolling elements 52, 62 is released. As a result, the driven member 12 moves in the 2 nd direction D2 by the biasing force of the 3 rd biasing member 16. Then, since the pressing portion 23 is disengaged from the 3 rd rolling element 22, the 3 rd rolling element 22 comes out of the concave portion 21 along the inclined portion 26 and returns to the initial position shown in fig. 8.

In embodiment 4, the following effects are obtained in addition to the above-described effects (1) to (8).

(12) When the driven member 12 moves in the 1 st direction D1 and reaches the target position, the 3 rd locking mechanism 20 restricts the movement of the driven member 12, so the driven member 12 can be more reliably stopped at the target position.

(13) The engagement of the 1 st, 2 nd, and 3 rd rolling elements 52, 62, and 22 with the driven member 12 is simultaneously released by driving the releasing driver 92, and the driven member 12 can be returned to the initial position.

(embodiment 5)

Fig. 10 shows an actuator 11D according to embodiment 5. The actuator 11D is different from the actuator 11A of embodiment 2 in part.

The release driving portion 92 and the driving solenoid 32 of the actuator 11D are arranged in this order along the 1 st direction D1. The movable iron core 96, the 2 nd biasing member 97, the 2 nd locking mechanism 60, the 1 st locking mechanism 50, the 1 st biasing member 14, and the 3 rd biasing member 16 are arranged in this order along the 1 st direction D1.

The drive mechanism 30D of the actuator 11D is located between the urging mechanism 15 and the release mechanism 90D. The housing 17 according to embodiment 5 may not be made of a magnetic material. The housing 31D of the drive mechanism 30D has a cylindrical peripheral wall and a holding portion 38D, and the holding portion 38D is an end wall that closes the opening at the 1 st end (left end in fig. 10) of the peripheral wall. The holding portion 38D holds the 2 nd locking mechanism 60.

The drive mechanism 30D may further include an end wall 31w that closes the opening at the 2 nd end (right end in fig. 10) of the peripheral wall of the housing 31D. The end wall 31w may be made of a magnetic material. The end wall 31w as a magnetic body can function as the fixed core 35 of the drive mechanism 30D.

The 1 st biasing member 14 has a 1 st end (left end in fig. 10) that engages with the 1 st fixing ring 53 and a 2 nd end (right end in fig. 10) that engages with the end wall 31 w. The 2 nd biasing member 97 has a 1 st end (left end in fig. 10) that engages with the movable iron core 96 and a 2 nd end (right end in fig. 10) that engages with the holding portion 38D. The release member 93D of the release mechanism 90D has a base end (left end in fig. 10) and a tip end (right end in fig. 10) that engage with the movable iron core 96.

The engagement member 18 of the driven member 12 may be in contact with the end wall 31w to define the initial position of the driven member 12. The end wall 31w may have a protrusion 31p protruding in the 1 st direction D1, and the protrusion 31p may contact the engaging member 18. This enables the initial position of the driven member 12 to be specified more precisely.

The projection length of the projection 31p is preferably set to correspond to the length of the movement region of the release member 93D. In other words, when the release member 93D is moved in the 1 st direction D1 at the maximum, the projection length of the projection 31p is preferably set so that the tip end of the release member 93D does not press the engagement member 18 (driven member 12) in the 1 st direction D1.

Next, the operation of embodiment 5 will be described.

When the coil 94 of the release mechanism 90D is energized, the movable iron core 96 moves in the 1 st direction D1 while pressing the base end of the release member 93D. When the release member 93D pressed by the movable iron core 96 moves in the 1 st direction D1, the 1 st and 2 nd locking mechanisms 50 and 60 release the locking of the driven member 12.

In embodiment 5, the following effects are obtained in addition to the above-described effects (1) to (8).

(14) The movable core 96 of the release mechanism 90D moves the release member 93D by pressing the base end of the release member 93D, i.e., the rear end in the moving direction. Therefore, the movement of the movable core 96 can be transmitted to the releasing member 93D more directly than in the case where the releasing member 93D is moved by pulling the distal end of the releasing member 93D in the moving direction.

(15) The release member 93D may not have a flange for engaging with the movable core 96, that is, an engagement portion for pulling the release member 93D by the movable core 96. Therefore, the shape of the releasing member 93 can be simplified.

The above embodiment may be modified by the following modification examples. The plurality of configurations included in the above embodiments can be arbitrarily combined with the configurations included in the following modifications. The configurations included in the following modifications can be arbitrarily combined with each other. Further, a plurality of structures included in the above embodiments may be arbitrarily combined with each other.

As shown in a modification of fig. 11, the 1 st lock mechanism 50 according to embodiment 1 may include an annular plate spring 55 that lightly biases the one or more 1 st rolling elements 52 toward the 1 st engagement portion 54. Thus, the backlash between the 1 st rolling elements 52 and the 1 st engaging portion 54 and the driven member 12 is reduced after the movable iron core 36 starts moving in the 1 st direction D1.

As shown in a modification of fig. 12, the 2 nd locking mechanism 60 according to embodiment 1 may include an annular plate spring 65 that lightly biases the one or more 2 nd rolling elements 62 toward the 2 nd engaging portion 64. Thus, the backlash between the 2 nd rolling elements 62 and the driven member 12 is reduced after the movable iron core 36 starts moving in the 2 nd direction D2 until the 2 nd rolling elements 62 bite into between the 2 nd engaging portion 64 and the driven member 12.

The 1 st, 2 nd, and 3 rd locking mechanisms 50, 60, and 20 are not limited to the structure in which the driven member 12 is locked by engagement of the rolling elements and the engagement portions, and the driven member 12 may be locked by wedges or friction, for example.

In embodiment 1, as in embodiment 2, the 2 nd locking mechanism 60, the 1 st locking mechanism 50, and the releasing drive unit 92 may be arranged in this order along the 1 st direction D1.

The driving mechanism 30 according to embodiment 1 may have another driving unit instead of the driving solenoid 32. For example, the drive mechanism 30 may include a motor as a drive unit, a shaft body having a male screw portion on an outer peripheral surface thereof, and a guide member having a female screw portion to be screwed with the male screw portion of the shaft body. When the shaft body is rotated by the driving of the motor, the shaft body moves in the 1 st direction D1 while rotating with respect to the guide member. The shaft body is preferably configured such that: the female screw portion and the female screw portion are returned to the original position when the screwing is released by the rotation. The other drive unit may include a mechanism that reciprocates the drive shaft 33 (piston) by hydraulic pressure such as hydraulic pressure or air pressure.

The release mechanism 90 may not include the release driving unit 92. In this case, the release member 93 is preferably moved manually. Alternatively, the release member 93 may be moved by a driving unit provided in another mechanism (e.g., a parking lock mechanism).

The position of the 3 rd urging member 16 may be changed. Alternatively, another mechanism (for example, a parking lock mechanism) to which the movement of the driven member 12 is transmitted may include the 3 rd biasing member 16. In this case, the actuator 11 may not include the biasing mechanism 15 (the 3 rd biasing member 16). When the unlocked driven member 12 is disposed so as to return to the initial position by its own weight, the actuator 11 may not include the biasing mechanism 15 (the 3 rd biasing member 16).

Claims (14)

1. An actuator is provided with:

a drive mechanism;

a driven member extending in a 1 st direction;

a 1 st locking mechanism configured to: the drive mechanism is configured to lock the driven member when moving in the 1 st direction by driving the drive mechanism, thereby moving the driven member in the 1 st direction, and is configured to: releasing the locking of the driven member when the driven member moves in a 2 nd direction, which is a direction opposite to the 1 st direction, in association with the stop of the driving mechanism;

a 2 nd lock mechanism configured to: locking the driven member to be moved in the 2 nd direction, and restricting the movement of the driven member in the 2 nd direction; and

a release mechanism configured to: and releasing the locking of the driven member by the 1 st locking mechanism and the 2 nd locking mechanism.

2. The actuator of claim 1,

the release mechanism includes a release member movable in the 1 st direction and a release drive portion configured to move the release member in the 1 st direction.

3. The actuator of claim 2,

the releasing drive unit is a releasing solenoid.

4. The actuator according to claim 2 or 3,

the driven member is a driven shaft having an axis along the 1 st direction,

the driven shaft, the 1 st locking mechanism, the 2 nd locking mechanism, and the release member are coaxially arranged.

5. The actuator according to any one of claims 2 to 4,

the releasing drive unit, the 2 nd locking mechanism, and the 1 st locking mechanism are arranged in this order along the 1 st direction.

6. The actuator according to any one of claims 2 to 4,

the 2 nd locking mechanism, the 1 st locking mechanism, and the releasing drive unit are arranged in this order in the 1 st direction.

7. The actuator according to any one of claims 2 to 4,

the 1 st locking mechanism, the 2 nd locking mechanism, and the releasing drive unit are arranged in this order along the 1 st direction.

8. The actuator according to any one of claims 1 to 7,

the 1 st locking mechanism includes a 1 st engagement portion and a 1 st rolling element rollable along the driven member, and the 1 st engagement portion is configured to: when the 1 st locking mechanism moves in the 1 st direction, the 1 st rolling element is engaged between the 1 st engaging part and the driven member,

the 2 nd locking mechanism includes a 2 nd engaging portion and a 2 nd rolling element rollable along the driven member, the 2 nd engaging portion is configured to: when the driven member is about to move in the 2 nd direction, the 2 nd rolling element is engaged between the 2 nd engaging portion and the driven member.

9. The actuator according to any one of claims 1 to 8,

the actuator further includes a 3 rd lock mechanism, and the 3 rd lock mechanism is configured to: when the driven member moves to the 1 st direction and reaches a target position, the movement of the driven member is restricted.

10. The actuator of claim 9,

the 3 rd locking mechanism includes a 3 rd rolling element rollable along the driven member, a recess configured to engage the 3 rd rolling element, and a pressing portion configured to press the 3 rd rolling element engaged with the recess,

the driven member has the recess.

11. The actuator according to any one of claims 1 to 10,

the drive mechanism is a drive solenoid.

12. The actuator of claim 11,

the driving solenoid includes a fixed iron core as a magnetic body, a coil, and a movable iron core as a magnetic body,

the movable iron core holds the 1 st locking mechanism.

13. The actuator according to claim 11 or 12,

the driving solenoid is a 1 st driving solenoid,

the driving mechanism further includes a 2 nd driving solenoid aligned in the 1 st direction with the 1 st driving solenoid.

14. The actuator according to any one of claims 1 to 13,

the actuator further includes a biasing member that biases the driven member in the 2 nd direction.

Images