JPH0359665B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric rotary actuator for electrically driving the locking/unlocking knob operation of an automobile door.

(Prior art) Conventional electric actuators include iron core solenoid type actuators that focus magnetic flux generated in a coil onto an iron core to form an electromagnet, and operate a movable part by the attractive force of the electromagnet. It is often used.

This iron core solenoid type actuator is
It is difficult to operate in both directions, that is, to apply operating force in the pulling direction and also in the pushing direction, and because it has a iron core, it cannot be installed inside the car door. It is difficult to form a small, flat structure that is watertight, and it also has the disadvantage of being heavy.

Therefore, in order to eliminate the above-mentioned drawbacks, the present applicant has filed a patent application for a coreless rotary actuator in Japanese Patent Application No. 1983-26190.

This iron-free rotary actuator is
a sector-shaped permanent magnet that is fixedly attached to the rotary movable body, has a magnetization direction in the linear direction of the rotary shaft, and is flat in the magnetization direction; a fixed base member that pivotally supports the rotary shaft of the rotary movable body; a sheet-like planar coil fixedly disposed facing the flat sector-shaped permanent magnet on a plane perpendicular to the rotational axis and having a plurality of conducting wire patterns extending in the radial direction; , the rotary movable body is rotated in both forward and reverse directions by electromagnetic action with the current flowing in the conductor wire extending in the radial direction of the sheet-like planar coil. This is related to the improvement of

(Problems to be Solved by the Present Invention) The above-mentioned ironless rotary actuator is capable of generating approximately equal output torque in either the forward or reverse direction at any position during the entire stroke. If it is possible and the power is cut off, it will stop at that position and be able to rotate freely.

Therefore, when a force is applied from the load side, it rotates without resisting the force and has no effect of maintaining a specific position.

However, when driving the lock/unlock knob of a car door, for example, it is desirable for theft prevention to maintain the operation end position at least when the knob is driven to the locked position. Preferably, the engagement and disengagement are linked to electric actuation of the actuator.

An object of the present invention is to provide a coreless rotary actuator that satisfies the above requirements.

(Means for Solving the Problems) The present invention provides a sector-shaped permanent magnet that is fixed to a rotary movable body, has a magnetization direction in the axial direction of the rotary shaft, and is flat in the magnetization direction, and a rotary shaft of the rotary movable body. a fixed base member for pivotally supporting the fixed base member; and a coil having a plurality of conductive wires extending in the radial direction, which is fixed on the fixed base member in a plane perpendicular to the rotation axis, facing the flat sector-shaped permanent magnet. A rotary actuator, wherein the rotary actuator is configured to rotate a rotary movable body in both forward and reverse directions by electromagnetic action between the flat fan-shaped permanent magnet and a current flowing in a conductive wire extending in the radial direction of the coil. a second permanent magnet that is provided at a suitable position on the periphery of the movable body, has the same magnetization direction as the first sector-shaped permanent magnet, is substantially on the same plane as the first sector-shaped permanent magnet, and is movable in the radial direction of the rotary movable body; , the second permanent magnet itself, or a locking member that is interlocked with the movement of the second permanent magnet, and a fixed base that is close to the periphery of the rotary movable body at a required rotational position to lock the rotation with the rotary movable body. A rotary lock comprising an entry recess for a locking member provided on a member, and a coil conductor provided on the same plane as a driving coil of the fan-shaped permanent magnet and perpendicular to the movable direction of the second permanent magnet. An object of the present invention is to provide a rotary actuator with a stop device.

(Function) In the present invention, a rotary movable body in a coreless rotary actuator is provided with a movable body made of a second permanent magnet, and the movable body has the same electromagnetic action as the driving principle of the rotary actuator. The rotary movable body is moved on the rotary movable body by using the second permanent magnet itself or the lock member interlocked therewith to engage the rotary movable body with the fixed base member. The reason is that it can be held at a desired position when there is no power.

(Embodiment) The figure shows an embodiment of the present invention, and first the basic structure of a rotary actuator will be explained.

1 is a rotary movable body, 2 is a fan-shaped permanent magnet, 3 is a stationary base member, 4 is a rotating shaft of the rotary movable body 1, 5 is a plane coil, and 6 is a yoke member of the fixed part.

The rotatable movable body 1 has a plane orthogonal to the axis of its rotary shaft 4 and includes a yoke member 7 of the rotary portion fixed to the rotary shaft 4.
A flat fan-shaped permanent magnet 2 is fixed on the plane portion of the coil 5 on the plane coil 5 side.

The fixed base member 3 includes a base body 3a that also serves as a flat casing that houses a rotary actuator mechanism in a hollow interior, and a lid 3b that closes an opening in the hollow interior.

The rotating shaft 4 of the rotatable movable body 1 is connected to the bottom surface 3c by a bearing hole 3d provided approximately in the center of the bottom surface 3c of the base body 3a and a boss hole 3e provided in the lid 3b corresponding to the bearing hole 3d. An output shaft 4 is rotatably supported perpendicular to the axis of the output shaft 4 and protrudes from the boss hole 3e.
An output lever 8 is fixed to a.

A yoke member 6, which is a disk-shaped fixed part, is fixedly fixed to the inside of the bottom surface 3c of the base body 3a in a non-rotatable manner. Planar coil 5
However, it is fixed and cannot be rotated.

The upper surface of the planar coil 5 and the opposing planes of the pair of flat sector-shaped permanent magnets 2 are parallel to each other, and a required gap is provided between them with the length of the enlarged diameter portion 4b of the rotating shaft 4. ing.

The sector-shaped permanent magnet 2 is magnetized in the axial direction of the rotating shaft 4, and its polarity is determined by the yoke member 7 of the rotating part.
The side is the south pole, and the planar coil 5 side is the north pole. However, this polarity direction is not specified at the time of installation because either direction of driving the sector-shaped permanent magnet 2 can be selected depending on the direction of the current flowing to the planar coil 5, which will be described later.

As shown in FIG. 5, the conductive wire pattern of the planar coil 5 is such that a plurality of conductive wire patterns 5a extending in the radial direction are drawn in the area facing the fan-shaped permanent magnet 2, and each conductive wire of the plurality of conductive wire patterns 5a is drawn. When a current flows in the same direction at the same time, the freely rotating sector-shaped permanent magnet 2, that is, the rotating movable body 1, rotates due to electromagnetic interaction between the current and the sector-shaped permanent magnet 2.

At this time, when a current is applied radially outward to each conductor of the conductor pattern 5a, the rotary movable body 1 rotates counterclockwise in FIG. When flowing, the rotating movable body 1
rotates clockwise in the same figure.

In addition, in this rotary movable body, the rotary movable body 1
Even if the rotating movable body 1 rotates and the position of the sector-shaped permanent magnet 2 is changed, the torque generated in the conductor pattern 5a
The area in which the opposing areas of the sector-shaped permanent magnets 2 overlap in a constant manner always occurs in a constant manner depending on the current value flowing there, and the direction of the torque depends on the direction of the current flowing in the conductor pattern 5a, as described above. Determined by.

When the current in the conductor pattern 5a is cut off, the rotary movable body 1 stops generating torque at that position, becomes freely rotatable, and rotates when an external force is applied from the load side of the output lever 8.

For example, when used to operate the lock/unlock knob of an automobile door lock device, if the position shown by the solid line of the output lever 8 in FIG. 4 is the locked position of the door lock (door cannot be opened), the rotary actuator can be operated in this locked position If the position of the output lever 8 shown in the solid line in Fig. 4 is the locked position of the door (door cannot be opened), the rotary actuator cannot be rotated in this locked position except by electric operation. This synergistically locks the door with the door lock device, making it possible to provide a more effective door lock with high anti-theft performance.

As will be described later, in the case of the present invention, when the knob is placed in the locked position by manual operation, it can be moved to the locked position either manually or electrically.

Therefore, the rotary actuator of the present invention is provided with means for holding the rotary movable body 1 in that position after the door lock position is electrically operated to the locked position using the key plate.

The rotary movable body 1 in FIG. 1 is shown in a locked position, and on the side 180° opposite to the sector-shaped permanent magnet 2, there is a rotary movable body 1 that is movable in the radial direction in almost the same plane as the sector-shaped permanent magnet 2. A second permanent magnet 9 is provided which is elongated in the radial direction and which itself acts as a bar member.

The magnetization direction of this permanent magnet 9 for bolts is the same axial direction of the rotating shaft 4 as that of the sector-shaped permanent magnet 2.

Furthermore, when the rotary rotary movable body 1 is in the locked position, the permanent bolt magnet 9 is placed on the same plane as the planar coil 5 directly below the bolt permanent magnet 9 so that the bolt permanent magnet 9 is oriented either radially outward or inward. For driving in that direction, a coil conductor 10 is provided perpendicular to the direction of movement of the magnet 9.

The coil conducting wire 10 may be provided using the circumferential portion 5b of the planar coil 5, or may be provided completely separately as in the embodiment.

As shown in the circuit diagram of FIG. 6, in order to obtain the direction and timing of driving the permanent bolt magnet 9, the timing and direction of current flowing through the coil conducting wire 10 can be determined by adjusting the timing and direction of the current flowing through the coil conductor 10. Since it is possible to make the current flowing to the conductor 5b the same as that of the conductor 5b,
Even if you use it, you can get exactly the same effect.

Note that the conductive wire of each coil in the present invention is not necessarily in the form of a sheet.

The base body 3a is close to the periphery of the rotary movable body 1 in the radially outward movement direction of the permanent magnet 9 for the bolt.
is provided with an entry recess 11 for the permanent bolt magnet 9, and the permanent bolt magnet 9 driven radially outward in this locked position is inserted into the recess 11.

After inserting the bolt permanent magnet 9 into this recess 11,
When the rotary actuator is in a power-off state, the permanent bolt magnet 9 remains in its recess 11 and locks the rotary movable body 1 to the base body 3a.

In order to operate in the unlocking direction from this state, the current for rotating the rotary movable body 1 counterclockwise is
Flow the conductor pattern 5a in the opposite direction, and at the same time turn on the key insertion detection switch.
Then, a current is passed in the opposite direction to the coil conducting wire 10 of the permanent bolt magnet 9 to cause the permanent bolt magnet 9 to escape from the recess 11 and to enable the rotary movable body 1 to rotate freely.

Incidentally, iron pieces or rubber magnetic bodies 12 and 13 are provided at both ends of the permanent bolt magnet 9, and the permanent bolt magnet 9 is attracted to one of the ends and held when the power is off. However, this attraction force is weaker than the driving force by the coil conducting wire 10, and in order to weaken it, it is preferable to make the contact surface rough.

As shown in FIG. 3, the permanent bolt magnet 9 is housed in a cylindrical bracket 14 made of synthetic resin and attached to the yoke member 7 of the rotary movable body 1 in order to move without resistance.

If the operation from the unlocked position to the locked position is performed by manual operation of the knob without turning on the key operation detection switch, the permanent magnet 9 for the lock will not be inserted into the recess 11 in the locked position. , operation to the unlocked position can be performed either manually or electrically.

In the above embodiment, the second permanent magnet 9 was used directly as a bar member, but the second permanent magnet 9 may actuate another bar member provided separately.

Furthermore, in the above-mentioned embodiment, the rotary movable body 1 is
Although the locking position when no power is supplied has been described as being at one end point of the operating stroke, it may be at both ends of the stroke, or in some cases may be at the midpoint of the stroke.

(Effects of the Invention) As described above, according to the present invention, the iron coreless rotary actuator itself is equipped with a means for locking reverse operation from the load side during no power supply, and the locking Since the locking and releasing operations of the means are performed electrically using the same operating principle as that of a rotary actuator, when a sheet-shaped coil is used, it is possible to make a common planar coil for both drives. and, in some cases, 1
Different parts of the two coils can be used in common, and the structure can be made smaller.

Furthermore, when used as an actuator for a door lock device for an automobile, it can act synergistically with the door lock device to improve the reliability of the locking effect of the door lock device.

[Brief explanation of drawings]

1 is a cross-sectional plan view of essential parts of a rotary actuator according to the present invention, FIG. 2 is a longitudinal sectional view taken along the - line in FIG. 1, and FIG. 3 is a longitudinal sectional view taken along the - line in FIG. Figure 4 is a plan view of Figure 2;
FIG. 5 is a cross-sectional plan view taken along the - line in FIG.
FIG. 6 is an electrical circuit diagram showing the usage state of the rotary actuator according to the present invention. 1...Rotating movable body, 2...Sector-shaped permanent magnet, 3...
...Fixed base member, 3a... Base body, 4...
Rotating shaft, 5... Planar coil, 6, 7... Yoke member, 8... Output lever, 9... Permanent magnet, 11...
... recess, 12, 13... magnetic material, 14... bracket.

Claims (1)

[Claims] 1. A sector-shaped permanent magnet that is fixedly attached to the rotary movable body, has a magnetization direction in the axial direction of the rotary shaft, and is flat in the magnetization direction, a fixed base member that pivotally supports the rotary shaft of the rotary movable body, and the fixed base member a coil having a plurality of conductive wires extending in the radial direction, the coil being fixed on a plane perpendicular to the rotational axis, facing the flat sector-shaped permanent magnet, and having a plurality of conducting wires extending in the radial direction; In a rotary actuator that rotates a rotary movable body in both forward and reverse directions by electromagnetic action with a current flowing in a conductor extending in the radial direction of a planar coil, the rotary actuator is provided at an appropriate position on the periphery of the rotary movable body, and , having the same magnetization direction as the first sector-shaped permanent magnet and being substantially on the same plane as that,
Moreover, a second permanent magnet that is freely movable in the radial direction of the rotary movable body, and a locking member that is interlocked with the movement of the second permanent magnet itself or the second permanent magnet, locks the rotation of the rotary movable body. at a required rotational position to be stopped, an entry recess of a locking member provided in a fixed base member close to the periphery of the rotary movable body is provided on the same plane as a driving coil of the sector-shaped permanent magnet;
A rotary actuator with a rotation locking device, comprising a coil conducting wire that runs perpendicular to the movable direction of the second permanent magnet.