JPS6237047A - Rotary actuator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 are often of the iron-core solenoid type, in which the magnetic flux generated in a coil is focused on an iron core to form an electromagnet, and the movable iron core is actuated by the attractive force of the electromagnet. It is being

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

Therefore, the present applicant aims to eliminate the above-mentioned drawbacks.

Patent application for iron coreless rotary actuator in 1980-
It is proposed in No. 26190.

This coreless rotary actuator is fixed to a rotary movable body and has a magnetization direction in the axial direction of the rotary shaft, and has a flat fan-shaped permanent magnet in the magnetization direction, and a fixed fixed magnet that pivots the rotary shaft of the rotary movable body. a base member; and a flat coil having a plurality of conducting wires extending in the radial direction, the flat coil being fixed on the fixed base member in 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. The movable body is rotated once in both forward and reverse directions by the electromagnetic action of a flat fan-shaped permanent magnet and a current flowing through a conductive wire extending in the radial direction of the flat coil, and the present invention relates to improvements thereto. It is.

(Problems to be Solved by the Present Invention) The rotary actuator according to the present invention is an electrical device, and its structure is also composed of mechanical parts, so that electrical wiring is included in the assembly process of the rotary actuator. This also makes it difficult to automate the assembly, and manual electrical wiring significantly increases the cost.

Furthermore, the rotary actuator according to the present invention can be driven to rotate in both forward and reverse directions. Therefore, when one of the rotational drives ends, the drive current in the same drive direction is immediately cut off, and the drive current in this drive direction is stopped. If re-driving is not possible and driving in the other direction, it is necessary to immediately put the rotary actuator on standby, and in some cases, electrical contacts or switch devices for this purpose may be installed inside the rotary actuator. It may be incorporated.

The present invention provides a coreless rotary actuator that has been made in view of the above-mentioned problems.

(Means for Solving the Problems) The present invention provides a permanent magnet that is fixed to a rotary movable body, has a magnetization direction in the axial direction of the rotary shaft, and has a flat permanent magnet in the magnetization direction, and a rotary shaft of the rotary movable body. a fixed base member that is pivotally supported; and a flat coil that is fixedly installed in the fixed base member on a plane perpendicular to the rotational axis, facing the permanent magnet, and in which a plurality of conducting wires extending in the radial direction are wound in a planar shape. and a flat coil support member that detachably supports the flat coil on a fixed base member, and is provided with contact pieces to which both ends of the conductive wire of the flat coil are electrically connected, and a flat coil support member that is connected to both ends of the flat coil. At a position where the contact piece can be electrically connected to the fixed base member or a member fixed to the fixed base member, a power supply electrode that supplies positive and negative power supply voltages to the coil is slightly connected. The reason lies in the fact that it has been made more effective.

(Function) A flat coil that requires electrical wiring is supported in advance on a coil support member that is easy to assemble automatically, and both ends of the coil conductor are connected to electrical contact pieces provided at important points on the coil support member. Further, a power supply terminal is provided at an appropriate location on the fixed base member to come into contact with the electrical contact piece when the coil support member is assembled to the fixed base member, thereby omitting electrical wiring processing during assembly. It is.

(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, (2a) and (2b) are sector-shaped permanent magnets, (3) is a fixed base member, and (4) is a rotary movable body (1).
, (5) is a flat coil, and (6) is a yoke member of the fixed part.

The rotary movable body (1) includes a yoke member (7) of a rotating part fixed approximately at the center of the rotating shaft (4) and having a plane orthogonal to the axis of the rotating shaft (4) of the rotary movable body (1). On the flat coil (5) side of the flat part of the yoke member (7),
A pair of flat fan-shaped permanent magnets (2a) (2b) are fixedly installed diagonally at 180 degrees.

The stationary base member (3) includes a planar base body (3a) and a stationary yoke member (6) which also serves as a lid for the box and is appropriately screwed into the opening of the base body (3a).

The base main body (3a) is a flat, thin box, and a hole (3b) on the opposite side of the opening is provided with a hole (3b) through which the output shaft (4a), which is one end of the one-rotation shaft (4), passes. 3c), and an output lever (8) is provided on the output shaft (4a) protruding from the hole (3c).

The periphery of the hole (3c) on the wall surface (3b) slightly protrudes outward, and the inner surface of the protruding portion (3d) is a recess (3c) that is depressed from the inner surface of the wall surface (3b).

A receiving shaft (9) for pivotally supporting the rotary shaft (4) is provided inwardly protruding at a location facing the hole (3C) of the fixed yoke member (6) facing parallel to the wall surface (3b). has been done.

A shaft hole (4c) for pivotally supporting the rotary shaft (4) is provided at the axis of the shaft end (4b) on the sector-shaped permanent magnet (2a) (2b) side of the rotary shaft (4). A bearing ball (10) is inserted into (4c), and the ball (10) thrust-bears the rotating shaft (4) with respect to the receiving shaft (9).

An electrically insulating rotating plate (11) is provided on the wall surface (3b) side of the yoke member (7) of the rotating part.

The rotary plate (11) has a boss hole (llc) of a boss (llb) provided at the end of an arm (lla) extending in the radial direction fitted into the rotary shaft (4), The outer diameter is loosely fitted into the recess (3e), and the outer end surface (l
A large number of balls (12) are inserted between the inner surface (3f) of the recess (3e) and a thrust bearing is provided.

A protrusion (lie) protruding toward the yoke member (7) side of the rotating part is provided in the middle of the arm (Ila) of the rotary plate (11), and the protrusion (lie) is provided on the yoke member (7). Fits into the hole (7a) to rotate the one-rotation plate (11) (
1) so that it can rotate in one piece.

The tip of the arm (lla) extending in the radial direction expands into a substantially fan shape in the rotational direction, and furthermore, the yoke member (7) of the rotating part
A flange-like part (llf) is formed that protrudes significantly from the periphery of the flange-like part (llf), and a conductive material is formed on the negative side surface of the flange-like part (llf), for example, on the side of the contact surface with the yoke member (7) of the rotating part. Short circuit plate (13)
is fixed.

The shorting plate (13) has sector-shaped permanent magnets (2a) (2b).
The contact holder (14
), multiple contacts (15) (15) (17)
(1g) contact end (15a) (16a) (17a)
(18a) extends so as to be able to come into contact with the shorting plate (13).

The contact holder (14) was provided on the coil support member (5a) of the flat coil (5), as shown in FIG. Approximately half of the thickness is fitted into the inverted U-shaped recess (5b),
Further, a stepped portion (14a) that supports a part of the periphery of the flat coil (5) is formed at the coil-side seam of the fitting portion.

The coil support member (5a) of the flat coil (5) is either a wire-wound coil made by winding a wire or a sheet-type coil made by printed wiring.
) are preferably made by integrally molding them from a synthetic resin material or the like.

The lead wires at both ends of the flat coil (5) are respectively connected to contact pieces <5c> (5d) provided on the negative side of the recess (5b).

One of the contact pieces (5c) (5d), e.g.
C) When the coil support member (5a) of the flat coil (5) is housed in the base body (3a), as shown in Fig. 3,
It comes into contact with the elastic contact end (19a) of the power supply terminal (19) provided on the base body (3a), and is electrically connected to the power supply circuit connected to the power supply terminal (19).

The other contact piece (5d), as shown in FIG. 4, when the contact holder (14) and the flat coil (5) are fitted,
The extension part of the contact (15) comes into contact with the power supply terminal (15c) to establish an electrical connection with the contact (5).

In addition, the contact (15) that contacts the contact piece (5d) in the example is connected to the power source voltage switching means, which will be described later, and then
In order to supply the power supply voltage to the contact piece (5d), a contact holder (
14), but when supplying power supply voltage directly to the contact piece (5d), the fixed base body (3a)
The power supply terminal (19) may also be provided with a structure similar to that of the power supply terminal (19).

Each contact (15) to (18) in the power supply switching means
As shown in FIG. 5, the contact ends (15a) (16a) (17a) (1
8a) are collectively provided approximately in the center of the rotation range of the shorting plate (13).

Contactor (15), Contactor (16), and Contactor (17)
) and the contactor (18) are arranged side by side with their strip-shaped spring parts parallel to each other, and the contactor (15) and the contactor (17) are arranged facing each other on a straight line, and are parallel to each other. The spacing between the contacts (15) and (16) is approximately twice as large as that between the contacts (17) and (18).

Each base end (15b) of each contactor (15) to (18) (
16b) (17b) (18b) are contactor holders (1
4) are each fixed with caulking studs (20).

The base end (15b) of the contactor (15) is attached to the contactor holder (
The side edge (14b) of 14) is extended outward, and the extended portion is bent downward to connect to the power supply terminal (15c).
It becomes.

The base end (18b) of the contactor (18) is attached to the contactor holder (
14) is extended in parallel with the other side 4i (14c), and its extension protrudes to the outside of the base body (3a) and serves as a pull-out terminal (21) for connection to the power supply circuit.

The short-circuiting plate (13) short-circuits one or all of the contacts (15) to (18) depending on the rotational position of the rotary movable body (1).

Figure 6 shows the position of the shorting plate (13) at the stroke end when the rotary movable body (1) is driven counterclockwise in Figure 1, and this position is also the start position when driven clockwise. be.

FIG. 7 similarly shows the stroke end when the rotary movable body (1) is driven clockwise, and this position is also the start position when driven counterclockwise.

During clockwise driving, a power supply voltage is applied with negative polarity to the power supply terminal (19) and positive polarity to the extraction terminal (21), and when driving counterclockwise, a voltage is applied with the opposite polarity.

In this way, when a voltage is applied and the driving direction is determined.

A diode (22) is connected in the forward direction from the contact (17) to the contact (18), and a diode (23) is connected in the forward direction from the contact (18) to the contact (16). do.

Therefore, when a voltage is applied as shown in the figure to drive the shorting plate (13) clockwise from the position of the shorting plate (13) in FIG. , diode (23), contact (16), shorting plate (13)
), connected to the contactor (15), and connected to the flat coil (5)
A voltage is applied to the rotary movable body (1), at which time the rotary movable body (1) rotates clockwise.

When the short circuit plate (13) rotates slightly clockwise with the rotation of the rotary movable body (1), the short circuit plate (I3)
17), and almost simultaneously with the contact (18), short-circuiting both ends of the diode (23), so that the positive voltage is applied to the contact (18) (15).
) to the flat coil (5), and this state is 1
It continues until the end of the clockwise stroke.

When reaching just before the end of the clockwise stroke shown in FIG.
8) is broken, and the voltage applied to the flat coil (5) is cut off.

The rotary movable body (1) becomes non-voltage and the flat coil (5)
Even if the drive current is interrupted, the rotation will proceed slightly due to inertia, etc., and the separation between the shorting plate (13) and the contacts (16) and (18) will be ensured.

In addition, as shown in FIG. 1 and FIG. 2, the rotary movable body (1) has the yoke member (7) of the rotary part cut at a key point toward the wall surface (3b) of the fixed vane main body (3a). Raise it up, set up a stopper (24), fit a cushioning member (25) such as rubber into the stopper (24), and insert the stopper (24) into the recess (26) provided in the wall (3b). So,
The stopper (24) is brought into contact with 14 (26a) (26b) at both ends of the rotational direction of the stopper (24) in the recess (26) at the stroke end in the surface drive direction, and the rotation range of the rotary movable body (1) is is regulated.

At the position of the shorting plate (13) shown in FIG.
6) Since (18) is disconnected from the shorting plate (13) and the diode (22) has the opposite polarity, no voltage is applied to the flat coil (5).

In the state shown in Fig. 7, when the power supply voltage polarity is reversed for counterclockwise driving, the lead terminal (21) becomes negative polarity.
The diode (22) is in the forward direction, and the flat coil (5)
A voltage is applied to the rotary movable body (1), thereby causing the rotary movable body (1) to rotate counterclockwise.

As the rotation progresses counterclockwise, the shorting plate (13) short-circuits all the contacts (15) to (18) and connects the flat coil (5).
The voltage applied to the flat coil (5) is maintained, and when the voltage reaches just before the end of the stroke, the contact (17) and the shorting plate (13) are separated, cutting off the voltage applied to the flat coil (5).

After that, the rotary movable body (1) rotates until it is stopped by the stopper (24), and reaches the state shown in FIG. 6.

(Effect of the invention) The rotary actuator having the structure explained above has the following features:
When each single component is assembled in a predetermined order, electrical wiring inside the base body (3a) is automatically completed, and finally, when the lid (3b) is closed, the assembly is completed.

Furthermore, in the embodiment of the present invention, the drive current is cut off immediately before reaching the stroke end in either forward rotation (eg, clockwise rotation) or reverse rotation (eg, counterclockwise rotation); At the end of the stroke, the drive coil and power circuit automatically switch to drive only in the opposite direction to the drive direction that leads to the end of the stroke, thereby eliminating unnecessary or careless It is also possible to easily incorporate a power supply voltage switching means that prevents power consumption and reduces heat generation of the drive coil, thereby making the rotary actuator more compact.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a rotary actuator according to the present invention, FIG. 2 is a vertical sectional view taken along line nn in FIG. 1, and FIG.
FIG. 2 is an enlarged vertical cross-sectional view taken along line mm in FIG. 1; 4 is an enlarged vertical sectional view taken along the line IV-IV in FIG. 1, FIG. 5 is a perspective view showing the relationship between the coil support member of the flat coil and the contact holder, and FIG. 6 is a counterclockwise view. FIG. 7 is a plan view showing the relationship between the shorting plate and each contact at the end of the stroke during clockwise driving. FIG. 7 is a plan view showing the relationship between the shorting plate and each contact at the end of the stroke during clockwise driving. (1) Rotating movable body (2a) (2b) Fan-shaped permanent magnet (3) Fixed base member (3a) Base body (
3b) Wall surface (3C) Hole (4) Rotating shaft
(4a) Output shaft (4b) Shaft end
(4C) Shaft hole (5) Flat coil (5a)
Coil support member (5b) recess (5c)
(5d) Contact piece (6) Yoke member (7) Yoke member (8) Output lever (9) Bearing shaft (11)
) Rotating plate (lla) Arm (llf) Flange-shaped part (13) Shorting plate (14) Contact holder (14a) Step part (14b) (14c) side!
(15) - (18) Contactor (15a) - (
18a) Contact end (15b) ~ (18b) Base end (15c) Power supply terminal (19) Power supply terminal (21
) Output terminal (22) (23) Diode (24) Stopper

Claims (1)

[Claims] a permanent magnet that is fixed 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 flat coil fixed on a plane perpendicular to the axis facing the permanent magnet and having a plurality of conductive wires extending in the radial direction wound in a plane, and the flat coil detachably supported on a fixed base member. and a flat coil support member provided with a contact piece to which both ends of the conductive wire of the flat coil are electrically connected, and a flat coil support member provided with a contact piece connected to both ends of the flat coil at a position where they can be electrically connected to each other. A rotary actuator comprising: a fixed base member, or a power supply electrode that is provided on a member fixed to the fixed base member and supplies positive and negative power supply voltages to a coil.