JP2022054166A - Electromagnetic actuator and electromagnetic actuator module - Google Patents

Abstract

To provide an electromagnetic actuator and an electromagnetic actuator module that can be made smaller while reducing the price.SOLUTION: An electromagnetic actuator includes a movable iron core 1 that is provided with an actuating pin 6 at one end and can move linearly in the axial direction, a first solenoid 21 provided at the first position in the axial direction of the movable iron core, a first permanent magnet 31 provided in the first position, a second solenoid 22 provided at a second position separated from the first position in the axial direction of the movable iron core, and a second permanent magnet 32 provided in the second position, and when no current is passed through the first and second solenoids, the movable core is held in a first holding position by a first magnetic circuit based on the first permanent magnet or a second holding position by a second magnetic circuit based on the second permanent magnet, and when the movable core is held in the first holding position, a current with a polarity that cancels the magnetic field by the first permanent magnet is passed through the first solenoid to move and hold the movable core to the second holding position.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electromagnetic actuator and an electromagnetic actuator module, and more particularly to an electromagnetic actuator in which a movable iron core is linearly moved by a solenoid and an electromagnetic actuator module in which a plurality of electromagnetic actuators thereof are provided.

Conventionally, electromagnetic actuators that linearly move a movable iron core (plunger) by a solenoid (coil) have been widely used in various fields. Such an electromagnetic actuator generally moves a movable iron core from an initial position to an operating position by passing an electric current through a solenoid, and performs a desired function by moving an operating pin provided on the movable iron core. ing.

However, in order to keep the movable iron core in the operating position, not only the power consumption increases because the current continues to flow through the solenoid, but also the price increases because the solenoid that can withstand continuous energization is required. There's a problem.

Therefore, conventionally, there has been a demand for an electromagnetic actuator capable of holding a movable iron core at an operating position without continuously passing an electric current through a solenoid, and various proposals have been made.

Jitsuzenpei 02-107272

As described above, conventionally, an electromagnetic actuator capable of holding a movable iron core at an operating position without continuously passing a current through a solenoid has been proposed. However, since the conventional electromagnetic actuator needs to be provided with a holding mechanism for holding the movable iron core in the operating position, for example, there is a problem to be solved such that the structure becomes complicated and the price increases and the size increases. ..

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an electromagnetic actuator and an electromagnetic actuator module that can be reduced in price as well as reduced in price.

According to one embodiment of the present invention, a movable iron core provided with an actuating pin at one end and capable of linearly moving in the axial direction, a first solenoid provided at a first position in the axial direction of the movable iron core, and the above-mentioned A first permanent magnet provided at the first position, a second solenoid provided at a second position separated from the first position in the axial direction of the movable iron core, and a second solenoid provided at the second position. An electromagnetic actuator comprising two permanent magnets is provided.

When no current is passed through the first solenoid and the second solenoid, the movable iron core is placed in the first holding position by the first magnetic circuit based on the first permanent magnet or the second magnetism based on the second permanent magnet. It is held in the second holding position by the circuit. When the movable iron core is held in the first holding position by the first magnetic circuit, a current having a polarity that cancels the magnetic field by the first permanent magnet is passed through the first solenoid, and the movable iron core is moved. When the movable iron core is moved to the second holding position by the second magnetic circuit and held in the second holding position by the second magnetic circuit, or when the movable iron core is held in the second holding position by the second magnetic circuit, the second solenoid is referred to. A current having a polarity that cancels the magnetic field generated by the second permanent magnet is passed, and the movable iron core is moved to the first holding position by the first magnetic circuit and held.

According to the electromagnetic actuator and the electromagnetic actuator module according to the present embodiment, there is an effect that the price can be reduced and the size can be reduced.

The objects and effects of the present invention will be recognized and obtained specifically by using the components and combinations pointed out in the claims. Both the general description described above and the detailed description below are exemplary and descriptive and do not limit the invention described in the claims.

FIG. 1 is a diagram showing an example of a conventional electromagnetic actuator. FIG. 2 is a diagram showing an embodiment of the electromagnetic actuator according to the present invention. FIG. 3 is a diagram for explaining the configuration of the electromagnetic actuator shown in FIG. 2. FIG. 4 is a diagram for explaining the operation of the electromagnetic actuator shown in FIG. 2. FIG. 5 is a diagram schematically showing an example of a mechanism for expanding the operation of the electromagnetic actuator described with reference to FIG. 4. FIG. 6 is a diagram showing an example of an electromagnetic actuator module in which a plurality of electromagnetic actuators described with reference to FIG. 2 are provided. FIG. 7 is a diagram showing a modified example of the electromagnetic actuator described with reference to FIG. 2.

First, before describing the embodiments of the electromagnetic actuator and the electromagnetic actuator module according to the present invention in detail, the conventional electromagnetic actuator and its problems will be described with reference to FIG. 1. FIG. 1 is a diagram showing an example of a conventional electromagnetic actuator, and FIG. 1 (a) shows an electromagnetic actuator 100 that holds a movable iron core in an operating position by continuously passing an electric current through a solenoid, and FIG. 1 (b) shows. Shows an electromagnetic actuator 200 that holds a movable iron core in an operating position without continuously passing a current through a solenoid by providing a holding mechanism.

In FIGS. 1 (a) and 1 (b), reference numerals 101 and 201 are movable iron cores (plungers), 102 and 202 are solenoids (coils), 131 to 133 and 231 to 233 are yokes, and 104 and 204 are springs. 251 indicates a movable body, 252 indicates a locking portion, and 106 and 206 indicate an actuating pin.

As shown in FIG. 1A, the electromagnetic actuator 100 includes a movable iron core 101 provided with an actuating pin 106 at one end, a solenoid 102 provided so as to cover the movable iron core 101, a spring 104, and a yoke 131 to the same. It has 133. First, in the initial state (non-operating state) in which no current flows through the solenoid 102, the movable iron core 101 is at an initial position where the other end (lower surface) of the movable iron core 101 is in contact with the upper surface of the yoke 131 due to the repulsive force of the spring 104. Is held in.

Next, when a predetermined voltage is applied to the solenoid 102 and a current is passed through the solenoid 102, a magnetic field (magnetic flux, magnetic field) is generated by the solenoid 102. For example, the yoke 133 → the operating pin 106 → the movable iron core 101 → the yoke 131 → the yoke 132 → A magnetic circuit towards the yoke 133 is formed. As a result, the movable iron core 101 moves upward so as to contract the spring 104, that is, the upper surface and the lower surface of the movable iron core 101 move from the initial position to the broken line position (operating position) in FIG. 1 (a) (straight line). Moving.

As described above, when the movable iron core 101 moves from the initial position to the operating position, the tip of the operating pin 106 provided at one end of the movable iron core 101 also moves, and based on the movement of the tip of the operating pin 106, the tip of the operating pin 106 also moves. For example, various functions such as valve opening / closing and switch on / off are performed.

By the way, when it is desired to keep the operating pin 106 (movable iron core 101) in the operating position, it is necessary to continuously apply a predetermined voltage to the solenoid 102 and continue to flow a current. Therefore, the electromagnetic actuator 100 shown in FIG. 1A not only causes an increase in power consumption, but also requires a solenoid 102 having a performance capable of withstanding continuous energization, which leads to an increase in price.

As shown in FIG. 1 (b), the electromagnetic actuator 200 includes a movable iron core 201 provided with an actuating pin 206 at one end, a solenoid 202 provided so as to cover the movable iron core 201, a spring 204, and yokes 231 to 233. It also has a holding mechanism (251,252). Here, the holding mechanism is for holding the movable iron core 201 at the operating position without continuing to flow the current to the solenoid 202, and the movable body 251 fixed to the movable iron core 201 and moving together with the movable iron core 201. Further, it has a locking portion 252 that holds the movable iron core 201 in the operating position by utilizing the locking claw of the movable body 251. Since the locking claw and the locking portion 252 of the movable body 251 are not directly related to the present invention, their configurations are omitted.

First, in the initial state in which no current flows through the solenoid 202, the movable iron core 201 is held in the initial position by the repulsive force of the spring 204 provided between the lower surface of the yoke 231 and the upper surface of the movable body 251. Next, when a current is passed through the solenoid 202, a magnetic field is generated by the solenoid 202, and for example, a magnetic circuit is formed in the direction of the yoke 233 → the operating pin 206 → the movable iron core 201 → the yoke 231 → the yoke 232 → the yoke 233. As a result, the movable iron core 201 moves upward so as to contract the spring 204, and the upper surface of the movable iron core 201 and the upper surface of the actuating pin 206 move to the broken line position in FIG. 1 (b).

At this time, the movable body 251 is fixed by the locking portion 252, so that the movable iron core 201 can be held at the operating position even if the current flowing through the solenoid 202 is cut off. In order to return the movable iron core 201 from the operating position to the initial position, for example, a current is temporarily passed through the solenoid 202 to unlock the locking claw of the movable body 251 in the locking portion 252.

However, since the electromagnetic actuator 200 shown in FIG. 1B is provided with a holding mechanism such as a movable body 251 and a locking portion 252, the structure becomes complicated, which leads to an increase in size and price. Further, there is a problem in that reliability and durability are lowered by providing a mechanical holding mechanism.

Hereinafter, embodiments of the electromagnetic actuator and the electromagnetic actuator module according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a diagram showing an embodiment of the electromagnetic actuator according to the present invention, FIG. 2A shows a state in which the movable iron core is held in the first holding position, and FIG. 2B shows a state in which the movable iron core is held in the first holding position. The state where the movable iron core is held in the second holding position is shown.

In FIGS. 2 (a) and 2 (b), reference numeral 1 is a movable iron core (plunger), 21 is a first solenoid (lower coil), 22 is a second solenoid (upper coil), and 31 is a first permanent magnet (31). (Lower permanent magnet), 32 is the second permanent magnet (upper permanent magnet), 4 is the bypass part, 51 is the first base (lower base), 52 is the second base (upper base), 6 is the working pin, and 7 Indicates a guide pin. The bypass portion 4, the first base 51, the second base 52, and the movable iron core 1 can be made of a magnetic material such as 1% silicon steel. That is, the bypass portion 4, the first base 51 and the second base 52 form a magnetic material portion. Further, the materials of the actuating pin 6 and the guide pin 7, the gap between the movable iron core 1 and the first and second bases 51 and 52, and the like are, for example, due to the first and second permanent magnets depending on the holding position of the movable iron core 1. The optimum one is selected based on the setting of the strength (attraction force) of the magnetic circuit (MC31, MC31', MC32, MC32').

The movable iron core 1 can be linearly moved in the axial direction (vertical direction), an actuating pin 6 is provided at one end (upper surface) of the movable iron core 1, and a guide is provided at the other end (lower surface) of the movable iron core 1. A pin 7 is provided. Here, the actuating pin 6 causes the linear movement of the movable iron core 1 in the axial direction to act on the outside of the electromagnetic actuator, and the guide pin 7 stabilizes the linear movement of the movable iron core 1 in the axial direction. Is for. The working pin 6, the movable iron core 1 and the guide pin 7 will be described in detail later with reference to FIG. Further, in FIGS. 2A and 2B, only a portion of the guide pin 7 in contact with the other end of the movable iron core 1 is drawn, and a lower portion (lower surface or the like) of the guide pin 7 is omitted.

As shown in FIGS. 2A and 2B, a first solenoid 21 is provided at a lower position (first position) of the movable iron core 1 in the axial direction so as to cover the movable iron core 1. A first permanent magnet 31 is provided so as to cover the first solenoid 21. Further, at the upper position (second position) of the movable iron core 1 in the axial direction, a second solenoid 22 is provided so as to cover the movable iron core 1, and a second permanent magnet 32 is further provided so as to cover the second solenoid 22. It is provided. Here, when no current is passed through the first solenoid 21 and the second solenoid 22, the movable iron core 1 is moved to the first holding position by the first magnetic circuit MC31 based on the first permanent magnet 31 or to the second permanent magnet 32. It is held in the second holding position by the second magnetic circuit MC32 based on the above.

That is, in the state shown in FIG. 2A, due to the magnetic field (magnetic flux, magnetic field) of the first permanent magnet 31, the upper surface (one end) of the first permanent magnet 31 → the bypass portion 4 → the movable iron core 1 → the first base 51. → The first magnetic circuit MC31 toward the lower surface (the other end) of the first permanent magnet 31 is formed, and the movable iron core 1 is held in the first holding position by the first magnetic circuit MC31. When the movable iron core 1 is held in the first holding position, the magnetic field of the second permanent magnet 32 causes the upper surface of the second permanent magnet 32 → the second base 52 → the actuating pin 6 → the movable iron core 1 → the bypass portion 4. → A second magnetic circuit MC32'directing to the lower surface of the second permanent magnet 32 is also formed, but this second magnetic circuit MC32'includes an actuating pin 6 in the magnetic path, or has a second base 52. Since it contains a gap between the lower surface and one end of the movable iron core 1, it is weaker than the first magnetic circuit MC31, and the movable iron core 1 is stably held in the first holding position by the first magnetic circuit MC31. It will be.

Further, in the state shown in FIG. 2B, the magnetic field of the second permanent magnet 32 causes the upper surface of the second permanent magnet 32 → the second base 52 → the movable iron core 1 → the bypass portion 4 → the lower surface of the second permanent magnet 32. The second magnetic circuit MC32 toward the head is formed, and the movable iron core 1 is held in the second holding position by the second magnetic circuit MC32. When the movable iron core 1 is held in the second holding position, the magnetic field of the first permanent magnet 31 causes the upper surface of the first permanent magnet 31 → bypass portion 4 → movable iron core 1 → guide pin 7 → first base 51. → A first magnetic circuit MC31'directing to the lower surface of the first permanent magnet 31 is also formed, but this first magnetic circuit MC31'includes a guide pin 7 in the magnetic path, or other than the movable iron core 1. It is weaker than the second magnetic circuit MC32 because it includes a gap between the end and the upper surface of the first base 51, and the movable iron core 1 is stably held in the second holding position by the second magnetic circuit MC32. Will be.

Here, when the movable iron core 1 shown in FIG. 2A is held in the first holding position by the first magnetic circuit MC 31, the second magnetic circuit MC 32 is movable from the second base 52 via the actuating pin 6. It is drawn toward the iron core 1, but for example, when the gap between the lower surface of the second base 52 and the upper surface (one end) of the movable iron core 1 is narrow, or the distance that the movable iron core 1 moves is short. Can be thought of as directing the second magnetic circuit MC 32 from the second base 52 to the movable iron core 1 without going through the actuating pin 6. This also applies to the first magnetic circuit MC31 when the movable iron core 1 shown in FIG. 2B is held in the second holding position by the second magnetic circuit MC32, without going through the guide pin 7. The first magnetic circuit MC 31 may be considered as going directly from the movable iron core 1 to the first base 51.

FIG. 3 is a diagram for explaining the configuration of the electromagnetic actuator shown in FIG. 2. Here, FIG. 3A is a view of the electromagnetic actuator shown in FIG. 2A as viewed from above, and FIGS. 3B to 3D are an actuating pin 6, a movable iron core 1, and a guide. It is a figure for demonstrating the example of pin 7. As described in FIGS. 2 (a) and 2 (b) in FIGS. 3 (b) to 3 (d), the guide pin 7 has only a portion in contact with the other end of the movable iron core 1. It is drawn and the lower part of the guide pin 7 is omitted. This also applies to FIGS. 4 to 7 described later.

As shown in FIG. 3A, the first solenoid 21 and the second solenoid 22 have a cylindrical shape so as to cover the movable iron core 1, and the first permanent magnet 31 and the second permanent magnet 32 are respectively. It has a cylindrical shape that covers the corresponding first solenoid 21 and the second solenoid 22. The bypass portion 4, the first base 51 and the second base 52 also have a cylindrical shape. However, the first and second permanent magnets 31, 32, the first and second solenoids 21 and 22, the first and second bases 51 and 52 and the bypass portion 4 do not necessarily have to have a cylindrical shape, for example. Needless to say, it may have a polygonal cylinder shape or the like.

In the example shown in FIG. 3B, the movable iron core 1 is formed in a cylindrical shape, and an operating pin 6 made of metal is fixedly provided to one end of the movable iron core 1 by brazing or the like, and the movable iron core 1 is also provided. A guide pin 7 made of metal is fixedly provided at the other end of 1 by brazing or the like. Here, the actuating pin 6 and the guide pin 7 can be ignored as the first magnetic circuit MC31 and the second magnetic circuit MC32, for example, as described with reference to FIGS. 2 (a) and 2 (b). If possible, it can be made of synthetic resin such as plastic or various other materials. When the working pin 6 and the guide pin 7 are made of synthetic resin, the working pin 6 and the guide pin 7 are provided by being fixed to the movable iron core 1 by using an adhesive or the like.

In the example shown in FIG. 3 (c), the movable iron core 1 is formed as a cylindrical shape, and one pin functioning as an actuating pin 6 and a guide pin 7 is inserted inside the cylindrical movable iron core 1. It has become like. Although not shown, it is also possible to form the movable iron core 1, the actuating pin 6 and the guide pin 7 as one member.

In the example shown in FIG. 3D, the lower portion of the guide pin 7 is fixed to the first base 51 and is slidably inserted inside the cylindrical movable iron core 1. The lower surface portion of the actuating pin 6 is inserted and fixed inside the cylindrical movable iron core 1 so as to move in the same manner as the movable iron core 1. That is, when the movable iron core 1 moves upward from the first holding position to the second holding position (broken line position), the actuating pin 6 moves upward together with the movable iron core 1. At this time, the guide pin 7 is fixed in the same position by the first base 51, and the upper portion of the guide pin 7 slides inside the movable iron core 1 to stabilize the movement of the movable iron core 1. ing. The actuating pin 6 causes the linear movement of the movable iron core 1 in the axial direction to act on the outside of the electromagnetic actuator, and the guide pin 7 is for stabilizing the linear movement of the movable iron core 1 in the axial direction. It is as described above.

FIG. 4 is a diagram for explaining the operation of the electromagnetic actuator shown in FIG. 2, and FIG. 4 (a) shows that the movable iron core 1 is the first when no current is passed through the first solenoid 21 and the second solenoid 22. The state of being held in the first holding position by the first magnetic circuit MC31 based on the permanent magnet 31 is shown. FIG. 4B shows that when the movable iron core 1 is held in the first holding position, a predetermined voltage is applied to the first solenoid 21 to pass a current, and the magnetic field generated by the first permanent magnet 31 is canceled to move. A state in which the iron core 1 is moved from the first holding position to the second holding position is shown, and FIG. 4 (c) shows a predetermined voltage applied to the second solenoid 22 when the movable iron core 1 is held in the second holding position. It shows a state in which the movable iron core 1 is moved from the second holding position to the first holding position by applying an electric current and canceling the magnetic field generated by the second permanent magnet 32.

First, as described with reference to FIGS. 2 (a) and 2 (b), the movable iron core 1 is based on the first permanent magnet 31 when no current is passed through the first solenoid 21 and the second solenoid 22. It is stably held at either the first holding position by the first magnetic circuit MC31 or the second holding position by the second magnetic circuit MC32 based on the second permanent magnet 32. Note that FIG. 4A shows how the movable iron core 1 is held in the first holding position in the two stable states.

As shown in FIG. 4 (b), first, as shown in FIG. 4 (a), when the movable iron core 1 is held in the first holding position, the first permanent magnet 31 with respect to the first solenoid 21 A current with a polarity that cancels the magnetic field caused by the magnetism is passed. That is, a voltage (voltage of the first polarity) in the direction of canceling the first magnetic circuit MC31 based on the first permanent magnet 31 is applied to the first solenoid 21, and a current of the first polarity is passed. As a result, a magnetic field is generated in the first solenoid 21, and the magnetic field of the first solenoid 21 causes the first solenoid magnetic circuit MC21 generated in the first base 51 → the first permanent magnet 31 → the bypass portion 4 → the movable iron core 1. It is formed and functions to cancel (weaken) the first magnetic circuit MC31 by the first permanent magnet 31.

As a result, the movable iron core 1 is released from the first holding position by the first magnetic circuit MC31 based on the first permanent magnet 31. At this time, the movable iron core 1 is attracted upward (on the side of the second permanent magnet 32) by the second magnetic circuit MC 32 based on the second permanent magnet 32, and is attracted by the second magnetic circuit MC 32 based on the second permanent magnet 32. 2 Moves to the holding position (moves linearly) and is held. That is, even if the current flowing through the first solenoid 21 is cut off after the movable iron core 1 has moved to the second holding position, the movable iron core 1 is held in the second holding position as it is.

This is because, as described with reference to FIG. 2B, when the movable iron core 1 is in the second holding position, the second magnetic circuit MC32 due to the magnetic field of the second permanent magnet 32 is the first permanent magnet 31. Since it is stronger than the first magnetic circuit MC31'due to the magnetic field of the above, the movable iron core 1 is stably held at the second holding position by the second magnetic circuit MC32. From the viewpoint of reducing power consumption, it is preferable to immediately cut off the current flowing through the first solenoid 21 after passing a current having a polarity of canceling the magnetic field based on the first permanent magnet 31 through the first solenoid 21.

Here, when the movable iron core 1 is held in the first holding position, a current having a polarity for canceling the magnetic field based on the first permanent magnet 31 is passed through the first solenoid 21, and the current is applied to the second solenoid 22. In terms of high-speed operation, it is preferable to pass a current having a polarity (second polarity opposite to that of the first polarity) that enhances the magnetic field based on the second permanent magnet 32. That is, for the movable iron core 1 released from the first holding position, not only the second magnetic circuit MC32 based on the second permanent magnet 32 but also the second base 52 by the magnetic field of the second solenoid 22 → the movable iron core 1 → bypass. By forming the second solenoid magnetic circuit MC22'directing from the part 4 to the second permanent magnet 32, both the second magnetic circuit MC32 and the second solenoid magnetic circuit MC22' function with respect to the movable iron core 1 to attract the movable iron core 1. By doing so, faster operation becomes possible.

Further, as shown in FIG. 4 (c), when the movable iron core 1 is held in the second holding position, the polarity (first polarity) that cancels the magnetic field generated by the second permanent magnet 32 with respect to the second solenoid 22. ) Current flow. As a result, a magnetic field is generated in the second solenoid 22, and the magnetic field of the second solenoid 22 causes the second solenoid magnetic circuit MC 22 generated in the second base 52 → the second permanent magnet 32 → the bypass portion 4 → the movable iron core 1. It is formed and functions to cancel the second magnetic circuit MC32 by the second permanent magnet 32.

As a result, the movable iron core 1 is released from the second holding position by the second magnetic circuit MC32 based on the second permanent magnet 32. At this time, the movable iron core 1 is attracted downward by the first magnetic circuit MC31 based on the first permanent magnet 31, and moves to and holds the first holding position by the first magnetic circuit MC31 based on the first permanent magnet 31. Will be done. That is, even if the current flowing through the second solenoid 22 is cut off after the movable iron core 1 has moved to the first holding position, the movable iron core 1 is held in the first holding position as it is.

This is because, as described with reference to FIG. 2A, when the movable iron core 1 is in the first holding position, the first magnetic circuit MC31 by the magnetic field of the first permanent magnet 31 is the second permanent magnet 32. Since it is stronger than the second magnetic circuit MC32'due to the magnetic field of the above, the movable iron core 1 is stably held in the first holding position by the first magnetic circuit MC31. From the viewpoint of reducing power consumption, it is preferable to immediately cut off the current flowing through the second solenoid 22 after passing a current having a polarity of canceling the magnetic field based on the second permanent magnet 32 through the second solenoid 22. , As mentioned above.

Here, when the movable iron core 1 is held in the second holding position, a current having a polarity for canceling the magnetic field based on the second permanent magnet 32 is passed through the second solenoid 22, and the current is applied to the first solenoid 21. As described above, it is preferable to pass a current having a polarity that enhances the magnetic field based on the first permanent magnet 31 in terms of high-speed operation.

FIG. 5 is a diagram schematically showing an example of a mechanism for enlarging the operation of the electromagnetic actuator described with reference to FIG. 4, and FIG. 5 (a) corresponds to FIG. 4 (a) described above and is a diagram. 5 (b) corresponds to FIG. 4 (b) described above. As shown in FIGS. 5 (a) and 5 (b), the mechanism for expanding the operation of the electromagnetic actuator is composed of operation expansion pins 81 to 83, and the tip of the operation pin 6 is used by utilizing this principle. It is designed to increase the distance traveled.

That is, the pin 82 is provided with three fulcrums 8a to 8c, the fulcrum 8a is provided with the tip of the pin 81 whose lower surface is fixed to the upper surface of the second base 52 so as to be rotatable, and the fulcrum 8b is provided with the tip thereof. The tip of the actuating pin 6 is rotatably provided, and the lower end of the pin 83 is rotatably provided at the fulcrum 8c.

Here, the distance from the fulcrum 8a to the fulcrum 8b is L, and the distance from the fulcrum 8b to the fulcrum 8c is L × 2. At this time, as shown in FIGS. 5A to 5B, when the movable iron core 1 (the tip of the operating pin 6) moves upward by the distance D, the tip of the pin 83 moves upward by the distance D × 3. Move to. By applying the tip of the pin 83 as the tip of the working pin 6, the moving distance (working distance) of the movable iron core 1 by the electromagnetic actuator can be tripled. It should be noted that the mechanism for expanding the operation of the electromagnetic actuator shown in FIGS. 5 (a) and 5 (b) is merely an example, and it goes without saying that it can be realized by applying various known methods. Nor.

FIG. 6 is a diagram showing an example in which electromagnetic actuators described with reference to FIG. 2 are integrated, and FIG. 6A shows an example of an electromagnetic actuator module in which a plurality of electromagnetic actuators are integrated in the same plane. FIG. 6B shows an example of an electromagnetic actuator module in which a plurality of electromagnetic actuators are arranged and integrated so as to have multiple layers.

In the electromagnetic actuator module shown in FIG. 6 (a), the electromagnetic actuator of this embodiment described with reference to FIG. 2 (a) is regarded as one unit (electromagnetic actuator) 10, and two electromagnetic actuators 10 are fixed. It is configured. Of course, the number of electromagnetic actuators 10 to be fixed is not limited to two, and it goes without saying that a larger number of electromagnetic actuators 10 can be integrated to form an electromagnetic actuator module as needed.

The electromagnetic actuator module shown in FIG. 6B is formed by arranging and integrating a plurality of electromagnetic actuators 10 in a multi-layered manner. In FIG. 6B, the two-layer configuration is used, but it is also possible to further increase the number of layers to form the electromagnetic actuator module. When a plurality of electromagnetic actuators 10 are multi-layered, for example, in order to align the tip positions of the actuating pins 6, it is necessary to adjust the length of the actuating pins 6 in the electromagnetic actuators 10 of each layer. As described above, according to the electromagnetic actuator in which a plurality of electromagnetic actuators are multi-layered and integrated, it is possible to increase the density of the actuating pins 6 of the plurality of electromagnetic actuators.

FIG. 7 is a diagram showing a modified example of the electromagnetic actuator described with reference to FIG. 2, and corresponds to a change in the set of the solenoid and the permanent magnet from two to three. That is, the above-mentioned electromagnetic actuator is composed of two sets of a first solenoid 21 and a first permanent magnet 31 provided at the first position, and a second solenoid 22 and a second permanent magnet 32 provided at the second position. However, in the modification shown in FIG. 7, a third solenoid 23 and a third permanent magnet 33 provided at the third position are further added. Here, FIG. 7A shows a state in which the movable iron core 1 is held at the first holding position by the magnetic field of the first permanent magnet 31, and FIG. 7B shows a state in which the movable iron core 1 is held at the third holding position. The state of being held in the third holding position by the magnetic field of the permanent magnet 33 is shown, and FIG. 7 (c) shows that the movable iron core 1 is held in the second holding position by the magnetic field of the second permanent magnet 32. Indicates the state.

In the modified electromagnetic actuators shown in FIGS. 7 (a) to 7 (c), two sets of adjacent solenoids and permanent magnets are used, for example, the first solenoid in FIGS. 2 (a) and 2 (b). It corresponds to 21 and the first permanent magnet 31 and the second solenoid 22 and the second permanent magnet 32.

That is, FIG. 7 (a) corresponds to FIG. 2 (a), FIG. 7 (b) corresponds to FIG. 2 (b), and the first solenoid 21 in FIGS. 7 (a) and 7 (b), The first permanent magnet 31, the third solenoid 23, and the third permanent magnet 33 are the first solenoid 21, the first permanent magnet 31, the second solenoid 22, and the second permanent magnet in FIGS. 2 (a) and 2 (b). Consider 32. Further, FIG. 7 (b) corresponds to FIG. 2 (a) and FIG. 7 (c) corresponds to FIG. 2 (b), and the third solenoid 23 in FIGS. 7 (b) and 7 (c), The third permanent magnet 33, the second solenoid 22, and the second permanent magnet 32 are the first solenoid 21, the first permanent magnet 31, the second solenoid 22, and the second permanent magnet in FIGS. 2 (a) and 2 (b). Consider 32. Thereby, an electromagnetic actuator including three sets of solenoids 21 to 23 and permanent magnets 31 to 33 shown in FIGS. 7 (a) to 7 (c) will also be understood.

The electromagnetic actuator including the three sets of solenoids and permanent magnets shown in FIGS. 7 (a) to 7 (c) is merely an example, and may be configured to include more sets of solenoids and permanent magnets. .. By increasing the number of sets of solenoids and permanent magnets in this way, it becomes possible to finely control the position of the tip of the actuating pin 6.

As described above, according to the electromagnetic actuator of the present embodiment, the price can be reduced and the size can be reduced by a simple configuration. It is also possible to ensure reliability and durability by eliminating the need for locking portions and springs. Further, when the movable iron core is held for a plurality of holding positions, it is not necessary to keep the current flowing through the solenoid, so that the power consumption can be reduced.

Although the embodiments have been described above, all the examples and conditions described here are described for the purpose of assisting the understanding of the concept of the invention applied to the invention and the technique, and the examples and conditions described in particular are described. It is not intended to limit the scope of the invention. Nor does such description in the specification indicate the advantages and disadvantages of the invention. Although embodiments of the invention have been described in detail, it should be understood that various modifications, replacements and modifications can be made without departing from the spirit and scope of the invention.

1,101,201 Movable iron core (plunger)
4 Bypass part (magnetic material part)
6,106,206 Actuating pin 7 Guide pin 10,100,200 Electromagnetic actuator 21 First solenoid (lower coil)
22 Second solenoid (upper coil)
23 Third solenoid (intermediate coil)
31 First permanent magnet (lower permanent magnet)
32 Second permanent magnet (upper permanent magnet)
33 Third permanent magnet (middle permanent magnet)
51 First base (lower base, magnetic material part)
52 Second base (upper base, magnetic material part)
81-83 Operation expansion pin 102,202 Second solenoid (coil)
131-133,231-233 York 104,204 Spring 251 Movable body 252 Locking part

Claims (15)

A movable iron core with a working pin at one end that can move linearly in the axial direction,
A first solenoid provided at the first position in the axial direction of the movable iron core, and
The first permanent magnet provided at the first position and
A second solenoid provided at a second position separated from the first position in the axial direction of the movable iron core, and
A second permanent magnet provided at the second position is provided.
When no current is passed through the first solenoid and the second solenoid, the movable iron core is placed in the first holding position by the first magnetic circuit based on the first permanent magnet or the second magnetism based on the second permanent magnet. It is held in the second holding position by the circuit and
When the movable iron core is held in the first holding position by the first magnetic circuit, a current having a polarity that cancels the magnetic field by the first permanent magnet is passed through the first solenoid, and the movable iron core is moved. Moved to the second holding position by the second magnetic circuit and held, or
When the movable core is held in the second holding position by the second magnetic circuit, a current having a polarity that cancels the magnetic field of the second permanent magnet is passed through the second solenoid, and the movable core is moved to the second solenoid. Moved to the first holding position by the first magnetic circuit and held.
An electromagnetic actuator characterized by that. When the movable iron core is held in the first holding position, a current having a polarity that cancels the magnetic field based on the first permanent magnet is passed through the first solenoid, and then a current is immediately passed through the first solenoid. To block,
The electromagnetic actuator according to claim 1. When the movable iron core is held in the first holding position, a current having a polarity for canceling the magnetic field based on the first permanent magnet is passed through the first solenoid, and the second solenoid is referred to by the second solenoid. Immediately after passing a current having a polarity that enhances the magnetic field based on the second permanent magnet, the current flowing through the first solenoid is cut off, and the current flowing through the second solenoid is cut off.
The electromagnetic actuator according to claim 2. When the movable iron core is held in the second holding position, a current having a polarity that cancels the magnetic field based on the second permanent magnet is passed through the second solenoid, and then a current is immediately passed through the second solenoid. To block,
The electromagnetic actuator according to claim 1. When the movable iron core is held in the second holding position, a current having a polarity for canceling the magnetic field based on the second permanent magnet is passed through the second solenoid, and the first solenoid is referred to by the first solenoid. Immediately after passing a current having a polarity that enhances the magnetic field based on the first permanent magnet, the current flowing through the second solenoid is cut off, and the current flowing through the first solenoid is cut off.
The electromagnetic actuator according to claim 4. At both ends of the first permanent magnet and the second permanent magnet in the axial direction of the movable iron core, magnetic material portions made of magnetic materials constituting the first magnetic circuit and the second magnetic circuit are provided, respectively. Yes,
The electromagnetic actuator according to any one of claims 1 to 5, wherein the electromagnetic actuator according to any one of claims 1 to 5. The first permanent magnet is provided so as to cover the first solenoid.
The second permanent magnet is provided so as to cover the second solenoid.
The electromagnetic actuator according to any one of claims 1 to 6, wherein the electromagnetic actuator according to claim 1. The first position and the second position are two adjacent positions at a plurality of positions separated from each other in the axial direction of the movable iron core.
The electromagnetic actuator according to any one of claims 1 to 7, wherein the electromagnetic actuator according to any one of claims 1 to 7. The plurality of positions include a third position in addition to the first position and the second position.
A third solenoid and a third permanent magnet are provided at the third position.
When no current is passed through the first solenoid, the second solenoid, and the third solenoid, the movable iron core has the first holding position by the first magnetic circuit, the second holding position by the second magnetic circuit, and the like. Alternatively, it is held at the third holding position by the third magnetic circuit based on the third permanent magnet.
The electromagnetic actuator according to claim 8. The actuating pin provided at one end of the movable iron core causes the linear movement of the movable iron core in the axial direction to act on the outside of the electromagnetic actuator.
The electromagnetic actuator according to any one of claims 1 to 9, wherein the electromagnetic actuator according to any one of claims 1 to 9. At the other end of the movable iron core, a guide pin for stabilizing the linear movement of the movable iron core in the axial direction is provided.
The electromagnetic actuator according to any one of claims 1 to 10, wherein the electromagnetic actuator according to claim 10. moreover,
An expansion mechanism unit for expanding the distance of linear movement of the movable iron core in the axial direction is provided.
The electromagnetic actuator according to any one of claims 1 to 11. The expansion mechanism unit expands the distance of linear movement of the movable iron core in the axial direction by applying the principle of the lever.
The electromagnetic actuator according to claim 12. The electromagnetic actuator according to any one of claims 1 to 13 is provided.
An electromagnetic actuator module characterized by that. The plurality of electromagnetic actuators are arranged in a multi-layered manner, and the movable iron core in each of the electromagnetic actuators is arranged in a high density.
The electromagnetic actuator module according to claim 14.

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