JPS61280756A - Rotary actuator with rotary connector - Google Patents

Abstract

PURPOSE:To improve the reliability of the locking effect of a door locking unit by internally mounting means for engaging a reverse operation from a load side at no power supply time in a rotary actuator itself of coreless type. CONSTITUTION:A recess 11 for inserting a permanent magnet 9 for a lock is formed on a base body 3a which approaches the peripheral edge of a rotary unit 1 in the radially outward moving direction of the magnet 9, and the magnet 9 driven radially outward at the locking position is inserted into the recess 11. When a rotary actuator is deenergized after the magnet 9 is inserted into the recess 11, the magnet 9 remains in the recess 11 to engage the unit 1 with the body 3a. Thus, when this is used as an actuator of a door locking unit for a vehicle, the reliability of its locking effect is enhanced.

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) In a conventional electric actuator, magnetic flux generated in a coil is focused on an iron core to form an electromagnet, and a movable part is actuated by the attractive force of the electromagnet. The iron core solenoid type is often used.

This iron core solenoid type actuator is difficult to operate in both directions, that is, it is difficult to apply an operating force in the pull direction and also in the push direction, and because it has an iron core. However, it is difficult to form a small flat structure that can be installed inside a car door, and it also has the disadvantage of being heavy.

Therefore, in order to eliminate the above-mentioned drawbacks, the present applicant filed a patent application filed in Japanese Patent Application No. 60-2 for a coreless rotary actuator.
A patent application has been filed with No. 6190.

This coreless rotary actuator is fixed to a rotating movable body, has a magnetization direction in the linear direction of the rotating shaft, and has a flat sector-shaped permanent magnet in the magnetization direction.

A fixed base member that pivotally supports the rotation axis of the rotary movable body, and a fixed base member that is fixed to a plane perpendicular to the rotation axis, facing the flat sector-shaped permanent magnet.

and a sheet-like planar coil having a plurality of conducting wire patterns extending in the radial direction, and the flat fan-shaped permanent magnet;
The rotary movable body is rotated in both forward and reverse directions by electromagnetic interaction with the current flowing in the conducting wire extending in the radial direction of the sheet-like planar coil, and the present invention relates to an improvement of the invention of the earlier application. It is something.

(Problems to be Solved by the Present Invention) The above-mentioned ironless rotary actuator is capable of generating a nearly uniform output torque in either the forward or reverse direction at any position of the entire stroke. And when the power is cut off, it stops at that position and can freely rotate.

Therefore, when the force from the load side is received in the opposite direction.

It rotates without resisting that force, and there is no action to maintain 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 operation of the actuator.

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

Means for Solving Problem C) 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 movable body is rotated in both forward and reverse directions by electromagnetic action between the flat fan-shaped permanent magnet and a current flowing in a conductor extending in the radial direction of the coil, wherein a peripheral edge of the rotary movable body The first
A second permanent magnet that has the same magnetization direction as the sector-shaped permanent magnet, is located on almost the same plane as the sector-shaped permanent magnet, and is movable in the radial direction of the rotary movable body, and the second permanent magnet itself or the second permanent magnet. A locking member that interlocks with the movement of the permanent magnet, and an entry recess for the locking member provided in a fixed base member that is close to the periphery of the rotary movable body at a required rotational position to lock the rotation of the rotary movable body. Another object of the present invention is to provide a rotary actuator with a rotation locking device, which includes a coil conducting wire that is provided on the same plane as the driving coil of the sector-shaped permanent magnet and runs perpendicular to the movable direction of the second permanent magnet.

(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 is rotated by the same electromagnetic action as the driving principle of the rotary actuator. moved on a movable body, thereby causing the second permanent magnet itself, or
The rotatable movable body is engaged with the fixed base member by the opening member interlocked therewith, and the rotatable movable body is held at a desired position when no power is applied.

(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 rotating movable body, (2) is a sector-shaped permanent magnet, (3) is a fixed base member, (4) is a rotating shaft of the rotating movable body (1),
(5) is a planar coil, and (6) is a yoke member of the fixed part.

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

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

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

A yoke member (6), which is a disk-shaped fixed portion, is fixedly fixed inside the bottom surface (3c) of the base body (3a) so as not to rotate.

On the upper surface of the yoke member (6), a sheet-shaped planar coil (5) made using a technique similar to printed wiring is fixed and non-rotatable.

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 one rotation axis (4)
A required gap is provided between the two with the length of the enlarged diameter portion (4b).

The sector-shaped permanent magnet (2) is magnetized in the axial direction of the rotating shaft (4), and its polarity is such that the yoke member (7) side of the rotating part is the S pole, and the planar coil (5) side is the N pole. There is. However, this polarity direction is not specified at the time of installation because either direction of driving the fan-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 conductor pattern of the planar coil (5) has a plurality of conductor patterns (5a) extending in the radial direction in the area facing the sector-shaped permanent magnet (2). When current flows simultaneously in the same direction through each conductor of the conductor pattern (5a), the electromagnetic interaction between the current and the sector-shaped permanent magnet (2) causes the sector-shaped permanent magnet (2) to rotate freely.
2), that is, the rotary movable body (1) rotates.

At this time, when a current is applied radially outward to each conductive wire of the conductive pattern (5a), the rotary movable body (1) rotates counterclockwise in FIG. When a current is passed inward, the rotary movable body (1) rotates clockwise in the figure.

Furthermore, during this rotational drive, even if the rotary movable body (1) rotates and changes the position of the sector-shaped permanent magnet (2), the torque generated in the rotary movable body (1) will not be generated between the conductive pattern (5a) and the sector-shaped permanent magnet (2). The range in which the opposing areas (2) overlap in a constant manner always occurs in a constant manner depending on the current value flowing there, and as mentioned above, the direction of the torque depends on the direction of the current flowing in the conductive pattern (5a). Determined.

When the current in the conductive pattern (5a) is cut off, this rotary movable body (1) stops generating torque at that position and becomes free to rotate, and when an external force is applied from the load side of the output lever (8), Rotate.

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), then this locked position When used for rotary actuator operation, if the position shown by the solid line of the output lever (8) in Fig. 4 is the door lock position (door cannot be opened), the rotary actuator cannot be operated in this locked position except for electric operation. By making it unrotatable, it can lock synergistically with the door lock device, providing a more effective door lock with high theft prevention properties.

As will be described later, in the case of the present invention, when the knob is placed in the locked position by manual operation, even by one manual operation,
It can also be operated to the unlocked position by electric operation.

Therefore, the rotary actuator in the present invention is
After the door lock device is electrically operated to the locked position using a key plate, a means for holding the movable body (1) in one rotation at that position is provided.

The rotary movable body (1) in Fig. 1 is shown in the locked position, and on the opposite side of the sector-shaped permanent magnet (2) at 18o.
A second permanent magnet (9) that is radially movable and elongated in the radial direction and that acts as an opening member itself is provided on substantially the same plane as the sector-shaped permanent magnet (2).

The magnetization direction of this opening permanent magnet (9) is the same as that of the sector-shaped permanent magnet (
This is the same axial direction of the rotating shaft (4) as in 2).

Furthermore, when the rotating movable body (1) is in the locked position,
The planar coil (5) directly under the opening permanent magnet (9)
), a coil conductor (10) for driving the opening permanent magnet (9) either radially outward or inward is arranged in the same plane as the movement of the magnet (9). It is placed perpendicular to the direction.

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.

This means that in order to obtain the direction and timing of driving the opening permanent magnet (9), as shown in the circuit diagram of FIG.
It is possible to make the timing and direction of current flowing through the coil conducting wire (10) the same as the current flowing through the conducting wire of the circumferential portion (5b) of the planar coil (5), so even if this is used, Exactly the same effect can be obtained.

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

An entry recess (11) for the opening permanent magnet (9) is provided in the base body (3a) close to the periphery of the rotary movable body (1) in the radially outward movement direction of the opening permanent magnet (9). , the opening permanent magnet (9), driven radially outward in this locked position, is inserted into its recess (11).

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

From this state, in order to operate in the unlocking direction, the rotary movable body (
1) in the opposite direction to the previous direction through the conductive pattern (5a), and at the same time, turn on the key insertion detection switch and turn on the opening permanent magnet (9). A current is passed through the coil conducting wire (10) in the opposite direction to the previous direction to cause the opening permanent magnet (9) to escape from the recess (11) and to enable the rotary movable body (1) to rotate freely.

In addition, an iron piece or a rubber magnetic body (12) (13) is provided at the end of the surface of the opening permanent magnet (9), so that when the power is off,
An opening permanent magnet (9) is attracted and held on either side. 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 opening permanent magnet (9) is attached to a synthetic resin cylindrical bracket (14) in order to move without resistance.
and is attached to the yoke member (7) of the one-rotation movable body (1).

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

In the above embodiments, the second permanent magnet (9) was directly used as the opening member, but this second permanent magnet (9)
) may actuate another opening member provided separately.

Furthermore, in the above-described embodiment, the position at which the one-rotation movable body (1) is locked when there is no power is one end point of one operation stroke, but it may be at both ends of the stroke, or in some cases It may be an intermediate point.

(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 means is Since the locking and releasing operations are performed electrically using the same operating principle as that of a rotary actuator, when a sheet-shaped coil is used, both driving planar coils can be made in common. Further, in some cases, different threads of one coil can be used in common, thereby reducing the size of the structure.

Furthermore, when used as an actuator for an automobile door lock device, 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 the drawing]

1 is a cross-sectional plan view of the main part of a rotary actuator according to the present invention; FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1; and FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. 4 is a plan view of FIG. 2; FIG. 5 is a cross-sectional plan view taken along the line ■-■ in FIG. 2; and FIG. It is a circuit diagram. (1) Rotating movable body (2) Fan-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 body (14) Bracket Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 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; a coil having a plurality of conductive wires extending in the radial direction, the coil being fixed on a plane perpendicular to the rotation 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 through a conductive wire extending in the radial direction of a coil, a first fan-shaped a second permanent magnet that has the same magnetization direction as the permanent magnet, is located substantially on the same plane as the permanent magnet, and is movable in the radial direction of the rotary movable body, and the second permanent magnet itself;
or a locking member that is interlocked with the movement of the second permanent magnet;
At a required rotational position to lock the rotation of the rotary movable body, the entry recess of the locking member provided in the fixed base member close to the periphery of the rotary movable body is flush with the driving coil of the sector-shaped permanent magnet. A rotary actuator with a rotation locking device, characterized in that the rotary actuator is provided with a coil conducting wire that runs perpendicular to the movable direction of the second permanent magnet.