JPS5828761B2 - Waveguide switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waveguide switching device that can switch the traveling direction of microwaves both electrically and manually.

The waveguide switching device is used to automatically switch the traveling direction of microwaves to a different route, or to switch between a working unit and a standby unit of a microwave communication line manually or by remote control.

As shown in FIG. 1, this type of conventional device transmits the rotational force of an electric motor 1 through a gear head 2 to a deceleration/intermittent rotation mechanism 9 including gears 3, 4° 5.6 and Geneva gears 7, 8. The rotation body 11 of the switching device main body 10 shown in FIG.
□, 133° and 134 were automatically switched.

In addition, when switching is performed manually, the gear 14 meshed with the gear 6 in the middle of the deceleration/intermittent rotation mechanism 9 is rotated by operating the manual knob 15, and the switch main body 10 is rotated in the same manner.
The switch was made by rotating a rotating body 11.

However, such a waveguide switching device.

This requires a complicated speed reduction mechanism including the gear head 2 and gears 3, 4, 5, and 6, which increases the number of parts, which is undesirable from the viewpoint of overall device reliability and product cost.

In addition, there is no problem in automatic switching, but in manual switching, the rotating body 11 of the switching device main body 10 is configured to not rotate unless the output shaft of the electric motor 1 is also rotated while increasing the speed of the gear. Because of this, the manual knob 15 is more than necessary.
The disadvantage was that it was heavy and difficult to operate manually.

Furthermore, in the case of this device, since the electric motor 1 and the manual knob 15 are separately protruded from the device, there is a drawback that the operating surface space is small and the manual knob 15 is difficult to turn.

The present invention proposes a waveguide switching device that improves the above-mentioned drawbacks, and will be described in detail below with reference to embodiments shown in the drawings.

FIG. 3 shows an embodiment of an electric drive source 30 that constitutes a main part of the waveguide switching device according to the present invention.

In the figure, 16 is a rotor made of magnetic material, 17 is a permanent magnet fixed to the rotor 16, and 18 is a permanent magnet 17.
It is a permanent magnet with a different polarity.

This permanent magnet 18 is also attached to the rotor 16, and a permanent magnet 17
It is located and fixed on the opposite side.

19 is the rotor 1 in order to reduce the magnetic resistance between the permanent magnets 17 and 18 and to make the magnetic field distribution between them nearly radial.
6 is a prismatic fixed internal magnetic path provided on the rotating shaft, and 20 is a driving wire wound around the fixed internal magnetic path 19.

The rotating element 16 and the permanent magnets 17 and 18 fixed thereto are supported by bearings (not shown) so as to be freely rotatable with respect to the fixed inner magnetic path 19 and the wire ring 20.

21 and 22 are stoppers fixed to a fixed object (not shown).

By contacting a protrusion 23 fixedly provided on the rotor 16, the rotation range in the clockwise and counterclockwise directions is limited, respectively.

That is, the stopper 2L22 and the projection 23 constitute a rotation range limiting mechanism 31.

In this embodiment, the rotation range is 45 degrees each in the clockwise and counterclockwise directions based on the state shown in the figure, that is, the total rotation angle is 90 degrees, but this can be set arbitrarily as long as it is within 180 degrees. It's fine.

To operate such an electric drive source 30, a drive current is supplied to the wire wheels 20.

When the polarities of the permanent magnets 17 and 18 and the direction of the current in the wire ring 20 are determined as shown, a torque is applied to the wire ring 20 that tends to turn it to the left according to Fleming's left hand rule.

However, since the wire ring 20 is fixed, the rotor 16 rotates clockwise due to the reaction and stops at the position where the protrusion 23 contacts the stopper 21, as shown in FIG.

In order to reversely rotate this, it is sufficient to reverse the direction of the current in the wire ring 20. In this case, as shown in FIG.
stops at the position where it contacts the stopper 22.

Here, the length of the two sides parallel to the line connecting the centers of the permanent magnets 17 and 18 of the fixed internal magnetic path 19 is a, and the length of the two sides perpendicular to this is b, and if a<b. For example, at each stop position in the clockwise and counterclockwise directions described above, the forces of the permanent magnets 17 and 18 to bow the fixed inner magnetic path 19 act as shown in FIGS. 4 and 5, respectively, so that the drive of the wire ring 20 is Even after the current is interrupted, there is a torque that holds each stop position.

In this case, if the drive current is kept constant, the relationship between the rotational position and the output torque will be as shown in FIG.

If a>b, then the direction of the force acting between the permanent magnets 17, 18 and the fixed internal magnetic path 19 will be as shown in FIGS. 7 and 8.

Therefore, when the drive current is cut off, the rotor 16 automatically returns to the position shown in FIG. 9 and stops.

Therefore, by manipulating the drive current, the rotor 16
The force S can be used to take two stopping positions, that is, the stopping positions in the counterclockwise and clockwise directions, and the stopping position intermediate between the two.

In addition, the relationship between the rotational position and the output torque in this case (1 drive current constant) is shown in Figure 10, which is close to the ideal for a rotational drive source with large torque at startup and small torque at stop. However, if it is desired to maintain the stopped position even after the drive current is cut off, an additional locking mechanism is required.

FIG. 11 shows an embodiment of the waveguide switching device according to the present invention, in which reference numeral 30 denotes the electric drive source described above, 24 fixes the fixed inner magnetic path 19 and the wire ring 20, and the electric drive source 30
16 is the rotor of the electric drive source 30, 7,
8 is a Geneva gear.

One Geneva gear 7 is fixed to the rotor 16 of the electric drive source 30, and the other Geneva gear 8 is fixed to the rotating body 1 of the switching device main body 10.
It is fixed at 1.

That is, these Geneva gears 7 and 8 constitute a rotational force transmission mechanism 32.

Therefore, in such a waveguide switching device, when performing automatic switching (electric switching), when the electric drive source 30 is energized, the rotor 16 rotates, and the rotational force is transmitted through the Geneva gears 7 and 8. The signal is transmitted to the rotating body 11 of the switching device body 10, and the rotating body 11 is intermittently rotated, thereby performing automatic switching.

During manual switching, when the rotor 16 of the electric drive source 30 is manually rotated using a knob, the rotational force is transmitted to the Geneva gear 7,
8 to the rotating body 11 of the switch main body 10, the rotating body 11 rotates, and manual switching is performed.

During this manual switching, the electric drive source 30 is not energized.

Note that the one-rotation drive source 30 can be used in fields where conventional rotary solenoids have been used.

According to such a rotary drive source 30, it is more efficient than a rotary solenoid, and by changing the direction of the drive current, the rotor can rotate forward and reverse, and the same torque can be obtained in both forward and reverse rotation. In addition, there is no back-and-forth movement in the axial direction of the output shaft due to rotation, and the cross-sectional shape of the prismatic fixed internal magnetic path is changed to provide self-holding action, or to have three stopping positions. It has advantages such as being able to change its characteristics.

As explained above, the waveguide switching device according to the present invention has a structure in which the rotor of the electric drive source is rotated both during automatic switching and manual switching to rotate the rotating body of the switching device body, so that automatic switching is possible. Switching work can be performed smoothly even when switching manually or manually.

In addition, in the case of the device of the present invention, the only thing protruding from the operating surface side is the electric drive source with a rotor that also serves as a knob for manual switching, so the space on the operating surface is wide and the knob is Rotation can be performed easily.

In particular, in the case of the device of the present invention, the rotational force transmission mechanism does not require a reduction mechanism, so the number of parts can be reduced, costs can be reduced, reliability can be improved, and high-speed rotation Since it does not contain any parts, it has the advantage that there is no noise caused by it.

The waveguide switching device of the present invention may be used not only for waveguide switching devices that operate both electrically and manually, but also for electrically-only waveguide switching devices. This has the advantage that it does not require a speed reduction device and does not include a high-speed rotating part.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the drive system of a conventional waveguide switching device, FIG. 2 is a cross-sectional view of the switching device body, and FIG. 3 is a sectional view showing an example of the electric drive source used in the present invention. Figures 4 and 5 are explanatory diagrams of the operation of the electric drive source shown in Figure 3, and Figure 6 is an illustration of the operation of the electric drive source shown in Figure 3.
7 to 9 are structure and operation explanatory diagrams of other embodiments of the electric drive source 1, and FIG. 10 is a diagram showing the relationship between the rotational position and output torque of the electric drive source shown in FIG. A diagram showing the relationship between the rotational position and output torque of the electric drive source shown in FIG. 9,
FIG. 11 is a drive system diagram showing an example of a waveguide switching device according to the present invention. 7.8...Geneva gear, 10...Switcher body, 11...Rotating body, 12...Fixed body, 16... Rotor, 17, 18...
・Permanent magnet, 19...Fixed internal magnetic path, 20...
... Line ring, 21.22 ... Stopper, 23
...Protrusion, 30...Electric drive source, 31
...Rotation range limiting mechanism, 32...Rotational force transmission mechanism.

Claims (1)

[Claims] 1 comprises an electric drive source and a switching device body to which a switching operation is performed by applying the rotational force of the electric drive source via a rotational force transmission mechanism, and the electric drive source has a fixed internal magnetic path in the form of a prism. , a wire wound around the fixed inner magnetic path, a rotor that surrounds the fixed white magnetic path and the wire and is rotatable relative to both, and a rotor fixed to the inner surface of the rotor. and a rotation range limiting mechanism that limits the rotation range of the rotor to within 180 degrees, and the switching operation is performed by manually or automatically rotating the rotor of the electric drive source. A waveguide switching device featuring: