JPH03226258A - Rotating mechanism for motor - Google Patents

Abstract

PURPOSE:To constitute a self retaining type optical switch simply by a method wherein the rotary shaft of a circular rotor, arranged coaxially with a stator having an elliptic hole, is provided with a flange for stopping the rotor near a part whereat a gap between the stator is minimum. CONSTITUTION:A stator 3 is formed of a yoke 4, connected magnetically to a stator core 3' having an elliptic hole, and a coil 5. A circular rotor 1 is secured to a rotary shaft 2 coaxial with the stator 3. A flange 6 is attached to the end of the rotary shaft 2 orthogonally to the rotary shaft 2. Stoppers 7a, 7b are attached to a part near a part whereat a gap between the rotor 1 is minimum. When the coil 5 is not excited, the S-pole and the N-pole of the stator 3, which are generated by the magnetic field of the rotor 1, for example, attracts the N-pole and the S-pole of the flange 6 but when the coil 5 is excited, the polarities of the flange 6 are converted, the flange 6 is pivoted into a direction shown by an arrow sign in a diagram to cut electric supply and the title mechanism is stopped as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motor rotation mechanism, and particularly to a motor rotation mechanism for an optical switch useful for switching optical paths in an optical communication system.

[Conventional technology]

Conventionally, this type of motor rotation mechanism has been used in a self-resetting type optical switch, as shown in FIG. 2(a).

(b), (c) and FIG. 3 illustrate the structure and function showing the principle of its rotational operation.

In the figure, the rotor 11 is made of a permanent magnet and has a ring shape, and the magnetic poles are located at symmetrical positions. A rotating shaft 12 is provided at the center of the rotor 11. Stator 13
is made of a flat plate of magnetic material, the portion facing the rotor 11 is semicircular, and is eccentric to the rotor 11.

The yoke 14 is made of a magnetic material, serves as the iron core of the coil 15, and is joined to the stator 13 to form a magnetic circuit.

FIG. 2(a) shows a state in which the coil 15 is not energized, and since the stator 13 is magnetized by the rotor 11,
The north and south poles of the rotor 11 are located at positions where the gap between the rotor 11 and the stator 13 is the smallest. coil 1
5, the polarity of the stator 13 is reversed due to the electromagnetic effect, the north pole of the rotor 11 attracts the south pole of the stator 13, and repels the north pole of the stator 13, and the rotor 11
The S pole of the stator 13 attracts the N pole of the stator 13 and
As shown in FIG. 2(c), the rotor 11 rotates around the rotating shaft 12 and is oriented at a position rotated by 180 degrees with respect to the initial position.

FIG. 3 shows that a collar 16 that is integral with the rotating shaft 12 is installed perpendicularly to the rotating shaft 12 of the rotor 11, and that the strikers 1.7a and 17b are placed on the rotation locus of the collar 16 at an angle of 90 degrees or less. The state shown is that it is placed within the range. The collar 16 and stoppers 17a and 17b limit the rotation range of the rotor 1 to 90 degrees or less. When the coil 15 is powered off,
Since the force that tries to position the rotor 11 and the stator 13 at the position where the gap is the smallest is exerted, the strike force occurs just before the position is located.
By providing the brim 17a, the brim 16 can be
It is held in contact with 7a. When the coil 15 is energized, the collar 16 rotates until it contacts the stopper 1.7b and then stops. If the power is turned off in this state, the rotor 11 and stator 1
3 acts to return to the position where the gap is at its minimum, and if the rotation range of the collar 16 is less than 90 degrees, the collar 16 rotates in the opposite direction until it contacts the stopper 17a and then stops.

[Problem to be solved by the invention]

The conventional motor rotation mechanism described above returns to the initial position when the power is turned off, so it can be applied as a self-resetting type optical switch, but it can be applied to a self-resetting type as an optical switch. had the disadvantage that it could not be applied.

[Means to solve the problem]

The present invention provides a motor rotation mechanism comprising a ring-shaped rotor, a stator provided on the outer periphery of the rotor, and a yoke and a coil magnetically connected to the stator.
The stator has holes formed with different gaps in the outer circumference of the rotor and is arranged concentrically with the rotor, and has a collar that is perpendicular to the rotation axis of the rotor and is integral with the rotation axis. and stoppers provided at two opposing locations near the minimum gap between the rotor and the stator on the rotation locus of the collar.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a) to 1(f) are functional configuration diagrams sequentially showing the operation of an embodiment of the present invention.

This embodiment includes a ring-shaped rotor 1, a stator 3 made of a magnetic plate and provided on the outer periphery of the rotor 1, and a stator 3.
The stator 3 consists of a yoke 4 and a coil 5 which are magnetically connected to each other, and the stator 3 is arranged at a concentric position of the rotor 1 by drilling oval holes having different gaps with respect to the outer circumference of the rotor 1. and a collar 6 which is orthogonal to the rotation axis 2 of the rotor 1 and is integrated with the rotation shaft 2, and a collar 6 that is located near the smallest gear ring portion of the rotor 1 and the stator 3 on the rotation locus of the collar 6 and is opposed to the rotation shaft 2 of the rotor 1. Stoppers 7a 7 provided at two locations
b.

In this embodiment, FIG. 1(a) shows a non-energized state as an initial state. The stator 3, which is a magnetic plate with an elliptical hole in the center, is affected by the magnetic field of the rotor 1 so that the part corresponding to the north pole of the rotor 1 becomes the south pole, and the part corresponding to the south pole of the rotor 1 becomes the north pole. are each magnetized. Since the rotor 1 moves in the direction where the gap between it and the stator 3 is minimized, by providing a stopper 7a at a position immediately before the horn 6 integrated with the rotor 1 is positioned, the collar 6 is held by the stopper 7a. .

Figure 1(b) shows that by energizing the coil 5 in a direction that reverses the polarity of the stator 3 in Figure 1(a), a repulsive force and an attractive force work between the rotor 1 and the stator 3, causing it to move to the left. The figure shows a state in which the collar 6 rotates until it comes into contact with the stone/17b and then stops. FIG. 1(c) shows a state in which the power is turned off from the state in FIG. 1(b). Although the stator 3 is no longer magnetized by the coil 5, the stator 3 is magnetized by the magnetic field of the rotor 1, so the rotor Force continues to act in the direction where the gap between stator 1 and stator 3 is minimized. Therefore, even when the power is turned off, the rotor 1 is held in the position shown in FIG. 1(b).

FIG. 1(d) shows a state in which the current is applied in the opposite direction to that in FIG. 1(b). In this energizing direction, the polarity of the stator 3 is reversed compared to FIG.
(See figure (e)). FIG. 1(f) shows a state in which when the power is turned off from the state shown in FIG. 1(e), the state shown in FIG. 1(e) is maintained as in the case of FIG. 1(c).

As described above, according to this embodiment, the rotor 1 is held in its position even when the power is turned off, so that it can be applied to devices that require self-holding type operation.

〔Effect of the invention〕

As explained above, by combining an elliptical stator and a circular rotor, the present invention eliminates the problem of the rotor returning to its initial position when the power is turned off, which is a drawback of conventional motor rotation mechanisms. , since it can be held in the position when energized, it is possible to realize a self-holding type optical switch.

[Brief explanation of drawings]

1(a) to f> are functional configuration diagrams sequentially showing the operation of an embodiment of the present invention, and FIG. 2(a). (b), (c), and FIG. 3 are functional configuration diagrams showing an example of a conventional motor rotation mechanism. 1.11... Rotor, 2.12... Rotating shaft, 3゜1
3... Stator, 4, 14... Yoke, 5.15.
...Coil, 6.16...Brim, 7a, 7b, 17a
. 17b...Stopper.

Claims (1)

[Claims] In a motor rotation mechanism composed of a ring-shaped rotor, a stator provided on the outer periphery of the rotor, and a yoke and a coil magnetically connected to the stator, the stator is attached to the outer periphery of the rotor. holes with different gaps are drilled in the rotor and arranged concentrically with the rotor;
and a collar that is perpendicular to the rotational axis of the rotor and is integrated with the rotational axis, and stoppers provided at two opposite locations near and opposite to a minimum gap between the rotor and the stator on the rotational locus of the collar. A motor rotation mechanism characterized by comprising: