JPS6043648B2 - bistable plunger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention combines a conventional switch with a sliding switching mechanism and a so-called remote switch that switches slidingly using a mechanical force transmission mechanism such as a wire to move in both directions. The purpose of the present invention is to realize a bistable flancier, have a latch mechanism for electromagnetically switching the switch, and provide a device with excellent responsiveness and large driving capacity.

Ding Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of essential parts of the present invention. In the figure, a lead wire 3 is pulled out from a solenoid coil 2 wound around a bobbin 1, a plunger 4 is loosely fitted in the center of the solenoid 2, and both ends of the lead wire 3 are pulled out from the inside of an inverted U-shaped inner yoke 8. It is slidable. At both ends of this plunger 4, disks 6a and 6b, which form a magnetic path and serve as a stopper, are fitted. The disk 6a is partially extended and bent into an L shape,
It is coupled with a driving rod 7 for driving an external mechanical load. A permanent magnet 9 magnetized in the vertical thickness direction is arranged on the back surface of the inner yoke 8, and an inverted U-shaped outer yoke 10 is arranged so as to be in contact with the permanent magnet 9. here,
Reference numeral 5a is a noise-muffling spacer mainly made of resin to reduce collision noise, and also functions to adjust the adsorption force between the outer yoke 10 and the disk 6a or 6b.

The drive portion configured as described above is fitted onto the base 11. The base 11 is molded from a non-magnetic material such as resin, and has a locking portion 11a1 and a claw portion 11b1 having spring properties.
A notch and a through hole 11c for operating the rod 7 for driving the disk 6a1, and a protrusion 11d for supporting a terminal 12 for fixing the lead wire 3 and guiding it to an external printed wiring board, etc. etc. In the figure, reference numeral 11e denotes a tapered portion for holding a case for covering the driving portion.

FIG. 2 schematically shows a cross-sectional view of the drive section shown in FIG. 1 attached to a so-called switch.

In the same figure, the plunger 4 is on the left side, and the plunger 4 is on the left side. 6
a is in adsorption relation with the outer yoke 10 with the spacer 5a in between, and the plunger 4 is latched (self-retained) in this state. 5b is a spacer attached to a hole in the inner yoke 8, and functions to muffle noise between the inner yoke 8 and the discs 6a, 6b. 1 may be extended into a cylindrical shape to also serve as a spacer.

The movable stroke of the plunger 4 is given by S in the figure, and a necessary stroke can be set.

Further, in the figure, it is preferable that the driving rod 7 is made of a non-magnetic and magnetic material. The lower half of the figure is a switch part that is slidably driven by this driving rod 7, and 15 is a frame having a predetermined hole for mounting the base 11;
16 is a terminal plate on which the switch terminal 18 is implanted; 17 is a sliding body for holding the contact piece and switching the connection of the switch; A groove portion 17a is provided. Figure 3 shows the second
Figure shows a side view. In the figure, the terminal 12 of the solenoid extends to the position of the terminal 18 of the switch, and the switch combined with the driving part can be mounted on the printed wiring board 19, or only the switch part can be mounted on the printed wiring board 19 in advance. , it is also possible to fit the drive section later. Reference numeral 13 in the figure is a case that functions to protect the drive unit from dust, etc., and the tapered part 1 of the base 11 is
1e. The operating principle of the present invention constructed as described above will be explained with reference to the schematic diagram of FIG. 4.

In FIG. 4, the main magnetic flux flows are indicated by arrows. Permanent magnet 9 placed between U-shaped inner yoke 8 and outer yoke 10
Therefore, the magnetic flux emitted from the N pole of 9 is transferred from the outer yoke 10 to the disk 6.
→ plunger 4 → S of permanent magnet 9 through inner yoke 8
Magnetic flux φ entering the pole. ．． A closed magnetic path is formed between the disk 6 and the outer yoke 10, and an attractive force acts between the disk 6 and the outer yoke 10, and the plunger 4 with the disk is latched at the left end. For this reason, outer yoke 1
The portion facing the disk 6 of 0 is magnetized to the north pole. On the other hand, although a magnetic path is formed on the right side, the magnetic flux φM2 is very weak due to the air gap. Next, when the solenoid 2 is energized and excited in a direction such that the left end of the solenoid becomes the N pole, the magnetic flux φ whose magnetic path is the plunger 4 → left side disk 6 → outer yoke 10 → air gap → right side disk 6 . 1 is formed.

At this time, the magnetic flux φ passing through the inner yoke 8. 2 is formed, but
The inner yoke 8 is U-shaped and one end is open.
Holes and grooves are provided on the bottom of the shape to increase magnetic resistance, so the magnetic flux φ.

2 becomes weaker.

In addition, magnetic flux also appears on the open side of the outer yoke 10, but this magnetic flux φ. 1 is leakage magnetic flux and is ignored.

Therefore, the surface of the left disk 6 facing the outer yoke 10 has a magnetic flux φC
1 becomes the N pole, and the permanent magnet 9 makes the outer yoke 1
A large repulsive force will be exerted between it and the N pole formed at the corresponding part of 0. On the other hand, on the right side, the magnetic flux φ.

1, the corresponding portion of the outer yoke 10 is magnetized to the north pole, and the opposing surface of the disk 6 is magnetized to the south pole, and an attractive force acts between the two.

In this state, when the solenoid 2 is energized so that the repulsion force is larger than the attraction force by the permanent magnet 9 on the left side, the plunger 4 with a disk suddenly moves due to the repulsion force between the outer yoke 10 and the disk 6. Escape and move to the right. As the plunger 4 moves to the right, the repulsive force on the left side becomes smaller but continues to act, while on the right side the attractive force due to φC1 acts, and the magnetic flux φ. ．． Since the suction force by 2 is also added, the force to continue moving the plunger 4 to the right increases rapidly from the middle of the stroke. In this way, the plunger 4 continues to move rightward with a substantially constant force even during the stroke, and the disk 6 hits the spacer 5a of the outer yoke 10.
Stop.

If the excitation of the solenoid 2 is stopped here, the magnetic flux φ becomes a closed magnetic path. The disk-equipped plunger 4 is latched at the right end by the suction force of N2.

Next, when an excitation current is applied in the opposite direction to the solenoid 2, a repulsive force acts on the right side, an attractive force acts on the left side, and the plunger 4 with a disk moves to the left. As described above, by switching the direction of the excitation current, the plunger 4 moves to the right and to the left, and is latched at a stable left and right position even when the current supply is stopped. The selection of the direction of operation of the plunger 4 is as follows:
The solenoid 2 may be formed into two coils inside the inner yoke 8, and the solenoid to be excited may be switched.

As described above, according to the configuration of the present invention, it is possible to obtain a bistable plunger that can drive the plunger 4 extremely efficiently, completes its operation instantaneously, and exerts a large driving force. Note that the disks 6 at both ends of the plunger 4 are
It functions to lower the magnetic resistance of the relevant magnetic path and to effectively utilize the repulsive force and attractive force between the outer yoke 10 and the opposing surface.

FIG. 5 shows an embodiment for increasing the magnetic resistance of the inner yoke 8 described above. In the figure, 8a and 8a'' are holes for passing the plunger 4 and the spacer 5b, and 8b
is a protrusion for supporting in the corresponding mounting hole of the base 11.

8c shows a notched groove, and 8d also shows a hole for the same purpose.

Furthermore, for this purpose, the inner yoke 8 may be divided into two parts as shown in FIG.

Alternatively, the magnet may be divided as shown in FIG. FIG. 6 shows an implementation in which the present invention is made horizontal in order to reduce the height in the vertical direction, and at the same time, the plunger 4 is extended in the longitudinal direction in order to drive the mechanical load in the coaxial direction of the plunger 4. Give an example. In addition, inner yokes 8e and 8f
Also shown is an example in which there are two bobbins and two coils on the inside. According to this configuration, even if two coils are arranged in the longitudinal direction, the main magnetic flux φ passes through the outer yoke 10 due to excitation. 1
This is extremely advantageous for forming two coils without significantly reducing the

In the figure, the plunger 4 is extended to protrude beyond the width of the outer yoke 10, and disks 6a and 6b are fixed between the outer yoke 10 and the inner yokes 8e and 8f, allowing bistable operation. do.

The base 11 made of non-magnetic material has an outer yoke 10 and an inner yoke 8e.
, 8f is provided, and the outer yoke 10 and the inner yoke 8 are fitted into the hole 11C''.
Fit the projections 10b and 8b of e and 8f. Also 11f
This is a support stand in which a corresponding part of the yoke is cut out in an inverted U-shape for ease of assembly, and the support stand is made to protrude to support a spacer fitted therein. Furthermore, depending on the practical convenience, permanent magnets may be arranged side by side like 9a and 9b as shown in this figure.

The permanent magnet may be magnetized either as an individual piece or with a yoke attached. Next, 14 is an auxiliary yoke provided to make effective use of the leakage magnetic flux φC1'' on the open side of the outer yoke 10, and the protrusion of the outer yoke 10 is provided at a sufficient distance so as not to become a magnetic path of the inner yoke 8. Part 1
0b'' by fitting the groove 14a of the auxiliary yoke 14 into the auxiliary yoke 14.

FIG. 7 shows the leakage magnetic flux φC1″ from the above-mentioned outer yoke 10.
An embodiment for activating the switch unit using a frame will be described. In the figure, the top surface of the frame 15 other than the minimum required hole for fitting the outer yoke 10 and passing the disk 6a which also serves as a driving rod is used as a magnetic path. 9c is a permanent magnet disposed between the inner yokes 8e, 8f and the frame 15 serving as a yoke to further increase the driving force and latching force.

If a strong plunger is required, increase the number of permanent magnets and use a cylindrical magnet magnetized in the radial direction, and use a cylindrical yoke to eliminate leakage magnetic flux to increase efficiency. All you have to do is raise it. However, the inner yoke must be provided with a notch or a hole in order to increase the magnetic flux φC1 that uses the outer yoke as a magnetic path out of the magnetic flux generated when the solenoid is excited. Further, the constituent elements 6a and 6b are not necessarily disk-shaped, but may be rectangular or rectangular.

Furthermore, depending on the behavior of the mechanical load to be driven, the disk 6b is also extended to form a driving rod, and a groove 17a for inserting the driving rod is added to the sliding body 17, so that it can be used for both driving. Can be made into a rod for smooth sliding.

FIG. 8 shows an embodiment of the invention in which the drive is arranged within the frame of the switch.

In the figure, the inner yoke 8 and the outer yoke 10 are fitted and supported in the corresponding holes of the terminal plate 16 of the switch, and the plunger 4a, which is extended for driving, has a cut groove at its end, and an E-ring is inserted into the plunger 4a. It is connected to the sliding body 17 of the switch by inserting a retaining ring 4b such as the above, and is driven and controlled in the rightward and leftward directions. FIG. 9 is a perspective view of main parts showing another embodiment of the present invention, in which the driving force from the bistable plunger is transmitted to the operating section 21 attached to the switch 22 via the remote wire 20, can be driven remotely.

What is remotely actuated is not necessarily a switch, but may be another mechanism. FIG. 10 shows another embodiment of the present invention.

Horizontal bistable plunger and remote wire 20
The spacer 5a of the bistable plunger,
Make 5b thicker and weaken the latching force. If this is done, the operating section 23 can be operated both manually for on/off operation and electromagnetically driven by a bistable plunger. The operating section 23 may simply have an operating mechanism, or may have a switch function as described above. Furthermore, it may be connected to another switch section 22 or the like via the remote wire 20. As described above, the bistable plunger according to the present invention utilizes the power of a permanent magnet in both the latching force of the plunger and the driving force of the plunger when energizing the solenoid, and also has an efficient magnetic circuit. By configuring
This is an energy-saving, small and lightweight bistable plan that operates by applying a pulse voltage, consumes little power, and self-holds in both directions, so no electricity is required to hold the plunger. By combining it with the base part, a versatile drive part can be realized, and driven parts such as switches can be logically controlled by electrical signals from peripheral electronic circuits, which is a great effect. have.

In addition, it can be easily combined with a conventional remote wire switch, etc., and if the base part described above is molded for a single remote switch, the switch part and wire part can be used as is, eliminating the need to manufacture new parts. This creates a major industrial advantage. Furthermore, the driving force can be easily increased, the bistable plunger has a large degree of freedom in placement in the electronic equipment used, and a printed wiring board can be used for power supply, which is effective in reducing wiring. demonstrate.

As described above, the present invention provides a bistable plunger that does not have complicated constituent parts, is easy to assemble, is small and lightweight, is inexpensive, can save electricity, save energy, and save wires, and is driven reliably. It is of great industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view of essential parts showing an embodiment of the bistable plunger of the present invention, Fig. 2 is a sectional view showing the embodiment when attached to a switch, and Fig. 3 is an embodiment of the bistable plunger of Fig. 2. 4 is an explanatory diagram of the operation in the embodiment of the present invention, FIG. 5 is a perspective view of the embodiment of the inner yoke according to the present invention, and FIG. 6 is a perspective view of main parts showing another embodiment of the present invention. Fig. 7 is a sectional view showing another embodiment of the present invention, Fig. 8 is a sectional view showing an embodiment built into a switch, and Fig. 9 is a sectional view showing an embodiment of the present invention for remote driving. A perspective view, FIG. 10 is a perspective view of an embodiment in which a manual operation part is driven remotely. 1...Bobbin, 2...Solenoid coil, 3...Lead wire, 4, 4a...Plunger, 5a, 5b... spacer, 6a,
6b... Disk, 7... Drive rod, 8, 8e
, 8f...inner yoke, 8a, 8a''...hole, 8b...protrusion, 8c...notch groove, 8d...
... Hole, 9, 9a, 9b, 9c... Permanent magnet,
10... Outer yoke, 10b, 10b''...
...Protrusion, 11...Base, 11a...
...Locking part, 11b...Claw part, 11c...
Through hole, 11d...Protrusion part, 11e...Tapered part, 11f...Support stand, 12...Terminal,
13...Case, 13a...Claw portion, 14...
...Auxiliary yoke, 14a...Groove, 15...
...Frame, 16...Terminal board, 17...
・Sliding body, 18...Terminal, 19...Printed wiring board, 20...Remote wire, 21
......Operation unit, 22...Switch, 23...
...Operation section.

Claims (1)

[Claims] 1. A U-shaped inner yoke, a solenoid with an excitation coil wound inside the inner yoke, a U-shaped outer yoke provided outside the inner yoke, and a U-shaped outer yoke arranged between the inner yoke and the outer yoke. The plunger consists of a permanent magnet placed between the yokes, a plunger that is longer than the length of the inner yoke, and a disk fixed to both ends of this plunger, and is used as a non-magnetic terminal plate or for fitting and locking. A bistable plunger characterized in that the inner yoke and the outer yoke are inserted into and integrated into a non-magnetic base having a claw portion. 2. The bistable plunger according to claim 1, wherein a part of the disc at the end of the movable plunger extends toward the base and is passed through a through hole in the base to serve as a driving rod for an external switch or the like. 3. A patent characterized in that an air gap is formed by providing holes or grooves to increase magnetic resistance on the bottom surface of the inner yoke that is in contact with the permanent magnet, or by making only a portion of the inner yoke contact the permanent magnet. A bistable plunger according to claim 1. 4. The bistable plan according to claim 1, characterized in that the outer yoke is extended and abutted against a frame made of a magnetic material of the switch section, and this frame is used as an auxiliary closed magnetic path for the outer yoke. jar. 5 Expand the inner yoke in the longitudinal direction of the movable plunger, and
The bistable plunger according to claim 1, characterized in that two solenoid coils are arranged inside the inner yoke. 6. A movable part of a remote wire for mechanical remote control is coupled to the drive rod, the wire is driven, and switches, operating parts, etc. can be electromagnetically controlled via this wire. A bistable plunger according to claim 1. 7 Drill a hole in the outer yoke so that the movable plunger passes through it, lock the extended end of the movable plunger with a part of the sliding body of the switch, and fit the outer yoke and inner yoke to the terminal board of the switch. The bistable plunger according to claim 1, wherein the plunger is locked and the sliding body is driven and controlled inside the frame.