JPH0644385U - Movable magnet type actuator - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a movable magnet actuator with improved reliability by preventing unnecessary rattling of the movable magnet body and output extraction pin. [Structure] A magnetic body 6 is provided between two permanent magnets 5A and 5B facing each other with the same pole, and a member 9 with a pin is provided on an outer end surface of the permanent magnet.
Is provided to configure the movable magnet body 3, and the three consecutive coils 2A, 2
A movable magnet body 3 is movably provided inside B and 2C, and three coils 2A, 2B and 2C are connected so that currents flow in different directions with the magnetic poles of the permanent magnets as boundaries, and the bearings are further connected. The pin portion 9A of the pinned component 9 is slidably supported by the member 20 so that a thrust force according to Fleming's left-hand rule is generated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a movable magnet type actuator for converting electric energy into reciprocating kinetic energy and the like by electromagnetic operation in control equipment, electronic equipment, machine tools and the like.

[0002]

[Prior art]

 Conventionally, as a movable magnet type reciprocating device, there are a reciprocating device having a structure of a first conventional example in FIG. 6 and a structure of a second conventional example in FIG.

In the first conventional example shown in FIG. 6, reference numeral 10 denotes a magnet movable body composed of a rod-shaped permanent magnet magnetized in the axial direction, and has magnetic poles on both end faces. The coils 11A and 11B are wound around the outer peripheral side of the end of the magnet movable body 10 so as to circulate in a ring shape, and the same pole is generated in adjacent portions. Although not shown, the coils 11A and 11B are usually mounted on a guide cylinder body for guiding the movable magnet body 10 movably in the axial direction. The magnetic flux from each end surface of the movable magnet body 10 is linked to the coils 11A and 11B, respectively.

In the second conventional example shown in FIG. 7, the movable magnet body 15 is composed of two rod-shaped permanent magnets 16A and 16B having the same poles facing each other, and a rod-shaped soft magnetic body 17 fixed between these permanent magnets 16A and 16B. Are fixedly integrated with each other, and the coil 18 is wound so as to circulate in an annular shape on the outer peripheral side of the intermediate portion of the magnet movable body 15. Although not shown, the coil 18 is usually attached to a guide cylinder body for guiding the movable magnet body 15 movably in the axial direction. The magnetic fluxes from the end faces of the permanent magnets of the movable magnet body 15 facing each other with the same pole are linked with the coil 18.

By the way, in the first conventional example and the second conventional example, the thrust generated in the magnet movable bodies 10 and 15 is basically similar to the thrust given based on Fleming's left-hand rule ( Fleming's left-hand rule is applied to the coil, but since the coil is fixed here, thrust is generated as a reaction force of the force acting on the coil in the movable magnet body.) Therefore, it is the vertical component of the magnetic flux of the permanent magnet of the magnet movable body (the component orthogonal to the axial direction of the permanent magnet) that contributes to the thrust.

Therefore, in the case of one permanent magnet or in the case of two permanent magnets of the same pole facing each other, the respective vertical components of the magnetic flux were analyzed.

FIG. 8 shows the result of magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surface of a single permanent magnet. However, the permanent magnet was a rare earth permanent magnet, and the diameter was 2.5 mm, the length was 6 mm, and the position at a distance of 0.25 to 0.45 mm from the surface of the permanent magnet was measured.

FIG. 9 shows the results of magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the two permanent magnets are arranged with the same poles facing each other and are directly bonded. Show. However, each permanent magnet was a rare earth permanent magnet, and had a diameter of 2.5 mm, a length of 3 mm (6 mm with two magnets), and the position measured 0.25 to 0.45 mm from the surface of the permanent magnet was measured.

FIG. 10 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the two permanent magnets are arranged with the same poles facing each other and the facing distance is 1 mm. The result is shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 11 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the two permanent magnets are arranged with the same poles facing each other and the facing distance is 2 mm. The result is shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 12 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when the two permanent magnets have the same poles facing each other and the facing distance is 3 mm. The result is shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 13 shows a case where two permanent magnets are arranged so as to face each other with the same pole, and a soft magnetic material having a length of 1 mm is arranged between the permanent magnets. The results of magnetic field analysis of the vertical component of the density are shown. However, each permanent magnet was a rare earth permanent magnet, and had a diameter of 2.5 mm and a length of 3 mm, and the position measured 0.25 to 0.45 mm away from the surface of the permanent magnet was measured.

In FIG. 14, two permanent magnets are arranged with the same poles facing each other, a soft magnetic material having a length of 1 mm is arranged between the permanent magnets, and the permanent magnets are opposed to the outer circumferences of the two permanent magnets. The results of magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the yoke is arranged are shown. However, each permanent magnet is a rare earth permanent magnet with a diameter of 2.5 mm and a length of 3 mm, and the yoke has a cylindrical shape surrounding the permanent magnet and has a thickness of 0.5 mm and a length of 10 mm, and is separated from the outer circumference of the permanent magnet by 1.25 mm. The vertical component of the surface magnetic flux density was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

[0014]

[Problems to be solved by the device]

 As described above, the thrust generated in the magnet movable body basically complies with the thrust given based on Fleming's left-hand rule, and the vertical component (permanent component) of the magnetic flux of the permanent magnet that interlinks with the coil. It is desired that there are many components (perpendicular to the axial direction of the magnet), but in the first conventional example of FIG. 6, the vertical component of the surface magnetic flux density is as shown in FIG. 8, and the two permanent components of FIGS. It was found that the vertical component is smaller than when the magnets are arranged with the same poles facing each other. Therefore, the structure of the first conventional example shown in FIG. 6 has a limit in improving the thrust. For example, the magnet movable body 10 is composed of a rare earth permanent magnet having a diameter of 2.5 mm and a length of 6 mm, and 40 mA is applied to each coil 11A and 11B so that the same pole is generated in the adjacent portions of the two coils 11A and 11B. The thrust F1 generated when the current of (4) was applied was 4.7 (gf).

On the other hand, in the second conventional example of FIG. 7, the magnet movable body 15 in which the soft magnetic material is arranged between two permanent magnets of the same pole facing each other is used, and the vertical component of the magnetic flux density is shown in FIG. As shown, the magnetic flux emitted from the magnetic poles of the permanent magnets 16A and 16B facing each other is the same as in the case of one permanent magnet (see FIG. 8) or only two permanent magnets (see FIGS. 9 to 12). Although there are many coils, there is only one coil that surrounds the intermediate portion of the magnet movable body 15, and there is a dislike that the magnetic flux from the magnetic poles on both end surfaces of the magnet movable body 15 is not effectively used. Therefore, it was difficult to improve the thrust force in the case of the second conventional example shown in FIG. For example, in the second conventional example of FIG. 7, two rare earth permanent magnets having a diameter of 2.5 mm and a length of 3 mm are used as the magnet movable body 15 (the performance of the rare earth permanent magnet is the same as that of the first conventional example), Moreover, by using a soft magnetic material having a length of 1 mm arranged between the two, a current of 40 mA is applied to the coil 18 made to have the same power consumption as that of the first conventional example in FIG. The thrust F2 generated when used as power consumption was 5.6 (gf).

When an output take-out pin is provided on the permanent magnet to form an actuator, it is desirable to eliminate unnecessary rattling of the magnet movable body and the output take-out pin, and consideration is given to that point. Will also be required.

In view of the above points, the present invention improves the thrust force by using a magnetic movable body in which at least two permanent magnets are arranged with the same poles facing each other and by effectively using the magnetic flux generated by the magnetic poles of the permanent magnets. It is also an object of the present invention to provide a movable magnet type actuator in which efficiency is improved and unnecessary rattling of a movable magnet body or an output take-out pin is prevented to improve operation reliability.

[0018]

[Means for Solving the Problems]

 In order to achieve the above object, the movable magnet type actuator of the present invention is provided with a magnetic body between at least two permanent magnets facing each other with the same pole, and providing an output take-out pin on at least one outer end surface of the permanent magnet. A movable magnet body, the movable magnet body is movably provided inside at least three continuous coils, and the at least three continuous coils are used to separate currents in different directions with the magnetic poles of the permanent magnets as boundaries. Is connected in such a manner that the current flows, and the output extraction pin is slidably supported by a bearing member that is supported in a fixed positional relationship with the triple coil.

Further, each permanent magnet and the magnetic body are housed in a non-magnetic cylindrical holder, and at least one end portion of the permanent magnet outer end surface is provided with a member with an output take-out pin. The magnet movable body may be configured by fixing the magnet movable body.

[0020]

[Action]

 The basic operation principle of the movable magnet type actuator of the present invention will be described with reference to the schematic configuration diagram of FIG. In FIG. 4, the movable magnet body 3 is formed by integrating two columnar permanent magnets 5A and 5B, which have the same poles facing each other, and a columnar soft magnetic body 6 fixed between these permanent magnets 5A and 5B. As shown in FIG. 13, the magnetic flux density has a large vertical component (a component orthogonal to the axial direction of the permanent magnet). The three coils 2A, 2B, 2C are wound so as to circulate around the outer circumference of the magnet movable body 3, and the left end of the permanent magnet 5A constituting the magnet movable body 3 and the same pole opposite ends of the permanent magnets 5A, 5B are arranged. And the magnetic flux from the right end magnetic pole of the permanent magnet 5B. These coils 2A, 2B, 2C are connected so that currents flow in different directions with the magnetic poles of the permanent magnets 5A, 5B as the boundary (the boundary between the magnetic poles must be between magnetic poles. It does not have to be in the middle position of the magnetic pole either.) Although not shown, the coils 2A, 2B, 2C are usually mounted on a guide cylinder for guiding the movable magnet body 3 movably in the axial direction. As for the positional relationship between the coils 2A, 2B and 2C and the movable magnet body 3, the currents flowing through the respective coils are opposite to each other with the magnetic poles of the permanent magnets as a boundary at all movable positions of the movable magnet body 3. To set.

The basic structure of the movable magnet body 3 in FIG. 4 is such that, as shown in FIG. 13, two permanent magnets face each other with the same pole and a soft magnetic body is arranged between the permanent magnets. In this FIG. 13, the vertical component of the surface magnetic flux density in the region Q corresponding to the position of the soft magnetic material is superior to that in FIGS. 9 to 12 without the soft magnetic material (the width of the peak of the magnetic flux density of 0.3T or more. Is wide and has a high peak.).

As described above, the magnet movable body 3 in which the two permanent magnets 5A and 5B have the same poles facing each other and the soft magnetic body 6 is provided between the permanent magnets can contribute to the thrust based on Fleming's left-hand rule. The magnetic flux component perpendicular to the longitudinal direction of the movable magnet body 3 can be increased, and the triple coils 2A, 2B, 2C effectively interlink with the magnetic fluxes of all the magnetic poles of the permanent magnet, so that the triple coils 2A, 2B. , 2C are alternately supplied with a current in a direction in which a magnetic field of opposite polarity is generated, so that a large thrust that cannot be reached in the conventional example can be generated. If the current of each coil is reversed, the direction of the thrust of the movable magnet body 3 is also reversed. When an alternating current is applied, it acts as a vibrator that vibrates repeatedly in a fixed cycle.

In the case of FIG. 4 which is the basic configuration of the present invention, for example, two rare earth permanent magnets having a diameter of 2.5 mm and a length of 3 mm are used as the magnet movable body 3 (the performance of the rare earth permanent magnet is the first conventional one). The same as in the example), and a soft magnetic material having a length of 1 mm arranged between the two was used to create the same power consumption as the first and second conventional examples in FIGS. The thrust F3 generated when a current of 40 mA was applied to the coils 2A, 2B and 2C and the same power consumption was applied was 6.7 (gf). This is about 1.42 times the thrust of the first conventional example with the same power consumption, and about 1.2 times the thrust of the second conventional example, which is a comparison with the first and second conventional examples. And it turns out that it is remarkably excellent.

The curve (a) in FIG. 5 shows the relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the case of FIG. 4 (without a yoke). However, the dimensions and characteristics of the permanent magnet are as shown in FIG. 13, and when the midpoint of the magnet movable body 3 is located at the midpoint of the central coil 2B, the amount of displacement is zero, and the current of each coil is Was 40 mA.

As described above, in the movable magnet type actuator of the present invention, the movable magnet body is composed of a combination structure of permanent magnets having the same poles facing each other, and is perpendicular to the magnetization direction (axial direction) of the permanent magnets. Since the magnetic flux density component can be made sufficiently large and the magnetic flux generated by all magnetic poles of the permanent magnet can be effectively used, the left hand of Fleming between the current flowing in at least three coils surrounding the movable magnet body The thrust based on the law can be made sufficiently large, and a large thrust can be obtained with a small size and a small current.

Further, although not shown in the basic configuration of FIG. 4, an output take-out pin is integrated with the magnet movable body, and the pin is slidably supported by a bearing member, so that the magnet movable body and the output can be output. Unnecessary rattling of the take-out pin can be eliminated and the pin can slide smoothly in the axial direction, so that the stability of operation can be ensured.

[0027]

【Example】

 An embodiment of a movable magnet type actuator according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention. In these figures, 1 is a soft magnetic cylindrical yoke, and three coils 2A, 2B, 2C are arranged inside the cylindrical yoke 1 to guide the movable magnet body 3 movably. The guide cylindrical body 4 is fixed to the cylindrical yoke 1 with an insulating member such as an insulating resin. The magnet movable body 3 includes two columnar rare earth permanent magnets 5A and 5B which are arranged in the same pole facing each other, a columnar soft magnetic body 6 fixed between the permanent magnets 5A and 5B, and the permanent magnets 5A and 5B. The permanent magnets 5A and 5B, the soft magnetic body 6, and the output pickup pin-attached member 9 are integrated with each other by an adhesive or the like. ing. The pinned member 9 may be either non-magnetic or magnetic. The three coils 2A, 2B and 2C are connected so that current flows in different directions with the magnetic poles of the permanent magnets 5A and 5B as boundaries. That is, the center coil 2B surrounds the end portion including the N pole of the soft magnetic body 6 and the permanent magnets 5A and 5B, and the coils 2A and 2C on both sides surround the end portion including the S poles of the permanent magnets 5A and 5B, respectively. In addition, the direction of the current flowing through the central coil 2B is opposite to the direction of the current flowing through the coils 2A and 2C on both sides (N and S attached to each coil in FIG. reference).

Further, non-magnetic side plates 8A and 8B are fitted and fixed to both ends of the soft-magnetic cylindrical yoke 1 and the non-magnetic guide cylindrical body 4, and brass is attached to the central part of the side plates 8A and 8B. Cylindrical bearing members 20 such as metal or high slidability resin are fixedly supported. The inner peripheral surface of each cylindrical bearing member 20 slidably supports the pin portion 9A of the pin-attached member 9 fixed to the outer end surfaces of the permanent magnets 5A and 5B. It projects to the outside.

In this embodiment, since the soft magnetic cylindrical yoke 1 is provided on the outer peripheral side of each coil 2A, 2B, 2C, the vertical component of the surface magnetic flux density of the magnet movable body 3 is as shown in FIG. Further increase as shown in. Therefore, the magnetic flux component perpendicular to the longitudinal direction of the magnet moving body 3 that can contribute to the thrust based on Fleming's left-hand rule can be increased, and the three coils 2A, 2B, which are wound around the magnet moving body 3 in an annular shape, An even greater thrust can be generated by passing a current in the direction of alternately generating magnetic fields of opposite polarity to 2C. For example, two rare earth permanent magnets having a diameter of 2.5 mm and a length of 3 mm are used as the magnet movable body 3 (the performance of the rare earth permanent magnet is the same as that of the first conventional example), and the length of 1 mm between both parties. Using a soft magnetic material arranged, a current of 40 mA is applied to the triple coils 2A, 2B and 2C which are made to have the same power consumption as the first and second conventional examples of FIGS. The thrust F4 generated at the same power consumption was 8.0 (gf). In the polarity of FIG. 1, the direction of the thrust F4 is the direction in which the magnet movable body 3 moves to the right, and if the current of each coil is reversed, the direction of the thrust of the magnet movable body 3 is also reversed. When an alternating current is applied, it acts as a vibrator that repeats vibrations at regular intervals.

The curve (b) in FIG. 5 is the axial displacement and thrust force of the magnet movable body 3 in the case of the embodiment (however, the dimensions and arrangement of the permanent magnet and the yoke and the characteristics of the permanent magnet are as shown in FIG. 14). It is related to gf) and shows when the movable magnet moves in the direction away from the point of zero displacement. The curve (c) is the relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the case of the embodiment (with a yoke), and shows the curve when moving toward the point of zero displacement. Show. However, when the midpoint of the magnet movable body 3 is located at the midpoint of the central coil 2B, the displacement amount is set to zero, and the current of each coil is set to 40 mA. In this way, the thrust differs depending on whether the movable magnet body 3 approaches or moves away from the point of zero displacement, because the movable magnet body 3 is displaced between the magnetic pole of the permanent magnet of the movable magnet body 3 and the yoke 1. This is because the magnetic attractive force that returns to the quantity zero is working.

Further, in the case of the above-mentioned embodiment, by supporting the member with a pin 9 integral with the movable magnet body 3 by the bearing member 20 so as to be slidable, the movable magnet body 3 is always centered on the inner circumference of the guide cylinder body 4. Therefore, it is possible to prevent the rattling of the magnet movable body 3 and the pinned member 9 from being unnecessary. Moreover, since the magnet movable body 3 does not come into contact with the inner peripheral surface of the guide cylinder 4, the magnet movable body 3 can be smoothly moved in the axial direction, and the magnet movable body 3 and the guide cylinder 4 can be moved smoothly. Problems such as wear can be solved.

FIG. 3 shows a modification of the movable magnet body used in the embodiment. In this case, the movable magnet body 3A has a cylindrical soft magnetic body 6 arranged between two permanent magnets 5A and 5B facing each other with the same pole, and these are housed in a non-magnetic cylindrical holder 7 and A member 9 with a pin for taking out an output is arranged on the outer end surface of each of the magnets 5A and 5B, and a disk-shaped portion 9B of the member 9 with a pin is fixed at both ends of the cylindrical holder 7. The permanent magnets 5A, 5B, the cylindrical soft magnetic body 6 and the member 9 with the pin may be fixed to the cylindrical holder 7 with an adhesive or the like, or the ends of the cylindrical holder 7 may be caulked. .

In the above-described embodiment, the side plates 8A and 8B may be made of a soft magnetic material and function as a suction plate. In this case, the magnet movable body 3 is attracted to one of the soft magnetic side plates 8A and 8B when the coils 2A, 2B and 2C are not energized. Then, if a thrust force is generated in each of the coils 2A, 2B, and 2C so that the magnet movable body 3 separates from the side plate that is currently attracted, the magnet movable body 3 moves in the opposite side plate direction and the attraction stops. To do.

Further, in the above-described embodiment, the magnet movable body 3 including two permanent magnets of the same pole facing each other and the soft magnetic body between the permanent magnets has been exemplified, but three or more permanent magnets of the same pole facing each other are provided. The soft magnetic material between the two permanent magnets may be provided, and the number of coils may be four or more correspondingly.

Furthermore, in the embodiment, the movable magnet body 3 has the pinned members 9 on both sides, but the pinned member 9 may be provided on only one of them. In this case, only one bearing member 20 is provided (however, it is desirable to make the bearing member 20 longer).

Further, in the embodiment, it is possible to adopt a structure in which the guide cylinder 4 is omitted and the coils 2A, 2B, 2C are insulated and fixed to the inner peripheral side of the yoke 1.

Although the cylindrical yoke 1 and the guide cylinder 4 are used in the above-described embodiment, it is also possible to employ a rectangular cylinder-shaped yoke and guide body. In this case, each coil also has an outer periphery of the magnet movable body. It may be wound so as to go around.

[0039]

[Effect of device]

 As described above, according to the movable magnet type actuator of the present invention, the magnetic movable body in which the magnetic body is provided between at least two permanent magnets having the same pole facing each other is used, and the pin is slidable by the bearing member. The magnetic flux component perpendicular to the longitudinal direction of the magnet moving body (the magnetization direction of the permanent magnet) can be sufficiently increased, and at least three coils are wound around the magnet moving body. Since it is possible to effectively interlink with the magnetic flux generated by each magnetic pole of the magnet movable body by winding, the thrust given based on Fleming's left-hand rule between the vertical magnetic flux component and the current flowing in each coil is Can be made large enough. In addition, it is configured such that an output take-out pin is provided on one side of the magnet movable body, and the pin is supported by a bearing member that is in a fixed positional relationship with the triple coil, so that the movable body of the magnet moves. Can be smoothed. Therefore, it is possible to realize a highly reliable movable magnet actuator that is small in size, has a small current, and has large thrust.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a movable magnet type actuator according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front sectional view showing a modified example of the movable magnet body used in the embodiment.

FIG. 4 is a schematic configuration diagram showing a basic configuration of the present invention.

5 is a graph showing the relationship between the amount of displacement of the movable magnet body and the thrust force in the movable magnet actuator shown in FIGS. 1 and 4. FIG.

FIG. 6 is a schematic configuration diagram showing a first conventional example.

FIG. 7 is a schematic configuration diagram showing a second conventional example.

FIG. 8 is a graph showing a vertical component (a component perpendicular to a longitudinal side surface) of a surface magnetic flux density on a longitudinal side surface (a surface parallel to a magnetizing direction of the permanent magnet) of a single permanent magnet.

FIG. 9 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side face when two permanent magnets of the same pole facing each other are directly brought into contact with each other.

FIG. 10 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side face when two permanent magnets are in the same pole facing state with an air gap of 1 mm.

FIG. 11 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are in the same pole facing state with an air gap of 2 mm.

FIG. 12 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side face when two permanent magnets are in the same pole facing state with an air gap of 3 mm.

FIG. 13 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side face when two permanent magnets are in the state of opposing each other with a soft magnetic body interposed therebetween.

FIG. 14 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are in the same pole facing state with a soft magnetic material interposed and a soft magnetic material yoke is arranged.

[Explanation of symbols]

 1 Cylindrical Yoke 2A, 2B, 2C Coil 3, 3A Magnet Moving Body 4 Guide Cylindrical Body 5 Cylindrical Permanent Magnet 6 Cylindrical Soft Magnetic Body 7 Cylindrical Holder 9 Pin Member 8A, 8B Side Plate 20 Bearing Member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Shigeo Saito 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation

Claims (2)

[Scope of utility model registration request] 1. A magnetic movable body is constructed by providing a magnetic body between at least two permanent magnets facing each other of the same pole, and providing an output take-out pin on an outer end face of the permanent magnet at least at one end thereof, and at least three continuous magnets. The magnet movable body is movably provided inside the coil, and the at least three coils are connected so that currents flow in different directions with the magnetic poles of the permanent magnets as boundaries, and the at least three coils are connected to each other. A movable magnet actuator characterized in that the output take-out pin is slidably supported by a bearing member supported in a fixed positional relationship. 2. The movable magnet body accommodates each permanent magnet and the magnetic body in a non-magnetic cylindrical holder, and at least one end portion of the permanent magnet outside end surface is provided with a member with an output take-out pin. The movable magnet type actuator according to claim 1, wherein the movable holder is fixed at an end of the holder.