WO2018078847A1

WO2018078847A1 - Rotary solenoid

Info

Publication number: WO2018078847A1
Application number: PCT/JP2016/082235
Authority: WO
Inventors: 古賀欣郎
Original assignee: タカノ株式会社
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2018-05-03
Also published as: JPWO2018078847A1

Abstract

A magnet part 7, of which one side in the axial direction Fs of a shaft 6 serves as an S pole, and the other side serves as an N pole, is used in a magnet rotor part 2. A pair of rotor yokes 12f, 12r, which protrude from the shaft 6 in the radial direction Fd, and are formed along a prescribed angular range Za in the circumferential direction Ff, are provided to both sides of the magnet part 7 in the axial direction Fs. A pair of end surface parts 4f, 4r of a casing 4, which are provided with bearings 5f, 5r, and which face each other, are provided with a rectangular shape Sr. Furthermore, the position of a side surface part 4p of the casing 4 which extends from at least one long side 4rm in an orthogonal direction is set as a close position Xs which allows the magnet rotor part 2 to rotate.

Description

Rotary solenoid

The present invention relates to a magnet rotor part rotatably supported by a bearing part provided in a casing, and a rotary solenoid provided with a pair of stator parts arranged on both sides in the radial direction of the magnet rotor part.

In general, a rotary solenoid is disposed on both sides in the radial direction of a magnet rotor portion having a magnet at an intermediate position of a shaft that is rotatably supported by a bearing portion provided on the casing, and is fixed to the casing. It comprises a pair of stator parts having coils mounted on the stator yoke, and has a function of switching between two positions by outputting a reciprocating rotational displacement.

Therefore, this type of rotary solenoid uses its reciprocating rotational property to sort money and banknotes, sort mail, etc., switch the transport path of printed matter, switch the optical path of optical equipment, and ion shutter of semiconductor manufacturing equipment. In particular, optical path switching of optical equipment is not only fast and has high operating angle accuracy, but also has a limited installation space. ) Is required, and in an ion shutter of a semiconductor manufacturing apparatus, it is necessary to perform ion trimming by arranging the shutter at a narrow pitch according to the size of the element. Rotary solenoids are required. Further, in order to sort defective products by a chip semiconductor sorting apparatus, an ultra-small rotary solenoid accompanying the miniaturization of chips is required.

Conventionally, rotary solenoids disclosed in

Patent Documents

1 and 2 proposed by the present applicant have been known as miniaturized rotary solenoids used for such applications. The rotary solenoid (rotary electric machine) disclosed in Patent Document 1 efficiently secures a coil housing space, achieves a compact size (ultra miniaturization), further reduces the overall cost, and has uniform characteristics and quality. Specifically, it is provided with a magnet rotor having a magnet in the middle part of the shaft, and a stator in which a coil is wound around a coil bobbin covering the iron core part. A pair of bobbin halves having a shape in which the coil bobbin is mounted from both sides and opposed to each other, and the coil winding part for winding the coil is overlapped more radially than the outer peripheral surface of the magnet. And an iron core portion mounted between a pair of half bobbin portions.

Further, the rotary solenoid (solenoid) disclosed in Patent Document 2 easily realizes an ultra-small solenoid and improves the reliability of the ultra-small solenoid by mechanically protecting the connecting portion of the wire end. Specifically, a cylindrical casing, an end surface cover that closes the opening of the casing, a coil bobbin accommodated in the casing, and one or two or more wound around the coil bobbin A coil, one or two or more pin terminals that are attached to a coil bobbin and connect a wire end led out from the coil, and a movable part having a magnet that is displaced by energization of the coil, in particular, a through hole provided in the coil bobbin The wire end can be connected to the wire connecting portion when the hole and the through hole are inserted from one end opening. It has an intermediate mounting portion that can be stopped at the final position where the wire connection portion and the wire connection portion are shielded by the barrier portion in the coil bobbin, and has a pin main body portion protruding from the other end opening of the through hole portion at the final position. And a pin terminal.

JP 2001-292557 A JP 2012-039804 A

However, conventional rotary solenoids including the rotary solenoids disclosed in Patent Document 1 and Patent Document 2 described above have the following problems to be solved.

First, in order to output a reciprocating rotational displacement, the movable part (rotor part) supported by the shaft is rotationally displaced, and the fixed part (stator part) facing the movable part is also connected to the circumference of the movable part. Arranged along the direction. As a result, the shape of the entire rotary solenoid (outer shape of the casing) viewed from the axial direction is a circular shape or a square shape that accommodates the circular shape, so even if the overall size is reduced, it is about 5 mm. The outer diameter is the limit. In particular, when the size is reduced to around 5 [mm], the coil winding space is narrowed, so the number of turns of the coil cannot be increased, and a magnetic flux and an ampere turn for obtaining necessary torque are secured. It becomes difficult. As a result, the current becomes excessive, and the smaller the size, the higher the temperature of the coil, causing the problem of torque reduction.

Second, since the magnet provided in the magnet rotor portion is magnetized in the radial direction, the magnetized waveform is sinusoidal. For example, when a ring-shaped magnet is used with two poles, a sufficient magnetic flux cannot be secured with respect to the volume of the magnet, and the torque decreases accordingly. This problem is caused by magnetizing after incorporating the magnet. In other words, when a magnetized magnet is assembled, the magnet is usually assembled because there is a risk of damage to the parts due to the generation of magnetic attraction force or adsorption of dust such as iron powder. Magnetization is performed after Eventually, when the magnetization waveform is sinusoidal, the portion perpendicular to the magnetization direction is close to an unmagnetized state, and the magnetic flux of the magnet is insufficient when downsizing is attempted.

Third, since the rotary solenoid reciprocally moves at two positions, a pair of stoppers for restricting the rotation displacement to two positions are required. In a rotary solenoid having a circular shape, it is difficult to secure a place for the stopper in the casing. After all, when a stopper is provided inside the casing, it is necessary to secure a separate arrangement space or separately arrange it outside, and as a result, it tends to hinder downsizing of the entire rotary solenoid. .

The present invention aims to provide a rotary solenoid that solves such problems in the background art.

In order to solve the above-described problems, the present invention provides a magnet rotor portion 2 having a magnet portion 7 at an intermediate position of a shaft 6 rotatably supported by bearing

portions

5f and 5r provided in the casing 4, and the magnet rotor. A pair of stator portions 3s having coils 9s attached to stator yokes 8s fixed to the casing 4 and disposed on both sides in the radial direction Fd of the portion 2, and a magnet rotor portion 2, the magnet part 7 is used in which one side in the axial direction Fs of the shaft 6 is the S pole and the other is the N pole, projecting in the radial direction Fd from the shaft 6 on both sides in the axial direction Fs of the magnet part 7; A pair of rotor yokes 12f and 12r formed over a predetermined angular range Za in the circumferential direction Ff are provided, and bearing

portions

5f and 5 are provided. A pair of opposite end face parts 4f and 4r in the casing 4 provided with a rectangular shape Sr is selected, and the position of the side face part 4p in the casing 4 extending in a right angle direction from at least one long side part 4rm is determined as a magnet rotor. The proximity position Xs that allows the rotation of the portion 2 is selected.

In this case, according to a preferred aspect of the invention, the rectangular shape Sr of the end face portions 4f and 4r is selected so that the length Ls of the short side portions 4rs... Is less than or equal to ½ of the length Lm of the long side portions 4rm. it can. On the other hand, the pair of stator portions 3s and 3t can be disposed in the inner spaces Rs and Rt of the casing 4 on both sides in the radial direction Fd of the magnet rotor portion 2 and on both sides in the longitudinal direction of the end face portions 4f. Further, the stator yokes 8s and 8t are loaded at the central positions of the coils 9s and 9t, and are arranged in parallel to the shaft 6, and the core portions 15s and 15t having both ends fixed to the casing 4, and the core portions 15s and 15t. A pair of yoke main body portions 16sf, 16tf, 16sr, and 16tr that protrude in the radial direction Fd from the core portions 15s and 15t and face the circumferential surfaces of the rotor yokes 12f and 12r are provided on both sides of the coils 9s and 9t in the axial direction Fs. Can be configured. Note that the casing 4 and / or the shaft 6 is preferably formed of a nonmagnetic material. In addition, the casing 4 is integrally provided with a pair of

stoppers

17s and 17t that are engaged with the rotor yokes 12f and 12r and restrict the rotation range Zr on the inner surface 4qi of the other side surface portion 4q that faces the side surface portion 4p. Can do. Further, the predetermined angle range Za can be selected from 80 to 140 [°]. On the other hand, the magnet part 7 can be constituted by a magnet main body part 7m and a separator part 7s using a magnetic material in contact with the axial direction Fs end of the magnet main body part 7m, or only the magnet main body part 7m. Can also be configured. At this time, the magnet body portion 7m may be formed of a cylindrical body Mr that covers the entire circumference of the outer circumferential surface 6f of the shaft 6 or a part of the circumference of the outer circumferential surface 6f of the shaft 6 in the circumferential direction. You may form with the circular arc body Ms to cover.

The rotary solenoid 1 according to the present invention having such a configuration has the following remarkable effects.

(1) The magnet rotor portion 2 uses a magnet portion 7 in which one side in the axial direction Fs of the shaft 6 is an S pole and the other is an N pole. Since the pair of rotor yokes 12f and 12r that protrude in the direction Fd and are formed over the predetermined angular range Za in the circumferential direction Ff are provided, a sufficient magnetic flux in the magnet portion 7 can be secured. As a result, even when the rotary solenoid 1 is made extremely thin, sufficient necessary torque can be secured.

(2) A side surface of the casing 4 extending in a direction perpendicular to at least one of the long side portions 4rm is selected from the pair of opposing end surface portions 4f, 4r in the casing 4 provided with the

bearing portions

5f, 5r in a rectangular shape Sr. Since the position of the portion 4p is selected as a proximity position Xs that allows the rotation of the magnet rotor portion 2, it can be arranged in a narrow space such as a gap between parts, and can be arranged in various arrangement spaces. It can be made compatible, and versatility can be dramatically improved.

(3) According to a preferred embodiment, if the rectangular shape Sr of the end face portions 4f and 4r is selected and the length Ls of the short side portion 4rs... Is set to ½ or less of the length Lm of the long side portion 4rm. It is also possible to easily realize the overall shape (outer shape) of 1 as a flat shape having a small thickness, particularly an ultra-thin shape having a thickness of 5 mm or less.

(4) According to a preferred embodiment, the pair of stator portions 3s and 3t are disposed in the internal spaces Rs and Rt of the casing 4 on both sides in the radial direction Fd of the magnet rotor portion 2 and on both sides in the longitudinal direction of the end face portions 4f. Then, since the stator portion 3s, the magnet rotor portion 2 and the stator portion 3t can be arranged along a straight line, the rotary solenoid 1 whose overall shape (outer shape) is a thin flat shape is also laid out. It can be reasonably realized from the viewpoint.

(5) According to a preferred embodiment, the stator yokes 8s and 8t are loaded at the central positions of the coils 9s and 9t and arranged in parallel to the shaft 6, and the core portions 15s and 15t having both ends fixed to the casing 4; A pair of yoke main body portions 16sf, 16tf, which protrude in the radial direction Fd from the core portions 15s, 15t and which face the peripheral surfaces of the rotor yokes 12f, 12r on both sides of the coils 9s, 9t in the axial direction Fs of the core portions 15s, 15t, If 16sr and 16tr are provided, a simple magnetic circuit that matches the shape of the magnet rotor portion 2 can be constructed. Therefore, unnecessary magnetic loss can be eliminated, the efficiency of the rotary solenoid 1 can be improved, and torque can be increased. Variations can be reduced.

(6) If the casing 4 is made of a non-magnetic material according to a preferred embodiment, unnecessary magnetic flux leakage to the casing 4 can be avoided, thereby contributing to further increase in efficiency of the rotary solenoid 1 and the shaft 6. If the nonmagnetic material is used, unnecessary magnetic flux leakage to the shaft 6 can be avoided, which can contribute to further increase in the efficiency of the rotary solenoid 1.

(7) According to a preferred embodiment, a pair of

stoppers

17s and 17t that are engaged with the rotor yokes 12f and 12r and regulate the rotation range Zr are provided on the inner surface 4qi of the other side surface portion 4q facing the side surface portion 4p of the casing 4. If provided integrally, the shape of the rotor yokes 12f and 12r can be used as a direct contact portion, so that a stopper mechanism for regulating the rotation range Zr can be easily constructed only by adding the

stoppers

17s and 17t. In addition, by using the dead space, a small stopper mechanism that can be disposed inside the casing 4 can be constructed, and the stop position can be highly accurate.

(8) According to a preferred embodiment, if the predetermined angle range Za is selected from 80 to 140 [°], it is possible to avoid destabilization of the attracting action and the repulsive action with the stator portions 3s and 3t, so that the magnet rotor The operation related to the reciprocating rotational displacement of the portion 2 can be reliably ensured, and the rotational range Zr as a necessary drive output can be ensured.

(9) According to a preferred embodiment, the magnet part 7 can be constituted by a magnet main body part 7m and a separator part 7s using a magnetic material in contact with the axial Fs end of the magnet main body part 7m. Alternatively, since the degree of freedom in design can be increased from the viewpoint of the assembling mode of the magnet main body 7m, such as being configured only by the magnet main body 7m, the target rotary solenoid 1 corresponding to the specifications can be easily obtained. Can do.

(10) According to a preferred embodiment, the magnet body portion 7m may be formed of a cylindrical body Mr that covers the entire circumference in the circumferential direction on the outer circumferential surface 6f of the shaft 6, or in the circumferential direction on the outer circumferential surface 6f of the shaft 6. The degree of freedom in design can be increased from the viewpoint of the shape of the magnet body 7m, such as the arc body Ms covering a part of the circumference, and by combining with the assembly of the magnet body 7m. Therefore, the degree of design freedom can be increased.

FIG. 2 is a cross-sectional plan view of a rotary solenoid according to a preferred embodiment of the present invention (cross section taken along line AA in FIG. 2); Sectional front view of the rotary solenoid, Cross-sectional right side view of the rotary solenoid, Appearance right side view with part of the rotary solenoid broken away, External bottom view of the rotary solenoid, Magnetic circuit diagram of the rotary solenoid, Action explanatory view using a sectional plan view of the rotary solenoid, Magnetic flux density distribution characteristic diagram of the gap by the magnetizing direction of the rotary solenoid, A cross-sectional front view showing a modification example of the magnet part in the magnet rotor part included in the rotary solenoid, A cross-sectional front view showing a modification example of the rotor yoke in the magnet rotor portion provided in the rotary solenoid, A cross-sectional front view showing a casing provided in the rotary solenoid and a modified example around the casing,

1: Rotary solenoid, 2: Magnet rotor part, 3s: Stator part, 3t: Stator part, 4: Casing, 4f: End face part, 4r: End face part, 4rs ...: Short side part, 4rm ...: Long side part, 4p : Side part, 4q: side part, 4qi: inner surface of side part, 5f: bearing part, 5r: bearing part, 6: shaft, 6f: outer peripheral surface of shaft, 7: magnet part, 7m: magnet body part, 7s: Separator part, 8s: stator yoke, 8t: stator yoke, 9s: coil, 9t: coil, 12f: rotor yoke, 12r: rotor yoke, 15s: core part, 15t: core part, 16sf: yoke body part, 16tf: yoke body part , 16 sr: yoke body, 16 tr: yoke body, 17 s: stopper, 17 t: stopper, Fd: radial direction, Fs: axial direction, Ff: circumferential direction, a: predetermined angle range, Zr: rotation range, Ls: length of short side, Lm: length of long side, Sr: rectangular shape, Xs: proximity position, Rs: internal space, Rt: internal space , Mr: Cylindrical body, Ms: Arc body

Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

First, the configuration of the rotary solenoid 1 according to the present embodiment will be described with reference to FIGS.

As shown in FIGS. 1 to 5, the rotary solenoid 1 according to the present embodiment includes a casing 4 having a flat rectangular parallelepiped shape. The casing 4 includes a casing main body 4m having an upper end opening and a casing main body 4m. The cover portion 4s closes the upper end opening. Thereby, the cover part 4s constitutes one end face part 4f in the casing 4, and the bottom face part of the casing body part 4m facing the end face part 4f constitutes the other end face part 4r. Thereby, a pair of opposite end surface parts 4f and 4r are comprised. For example, as shown in FIG. 4, the casing body 4 m and the cover 4 s are formed by protruding a plurality of fixed pieces 4 mc at the upper end of the casing body 4 m and caulking the fixed pieces 4 mc. It can be fixed to the cover portion 4s.

Further, as shown in FIG. 5, the shape of the end face portion 4r is selected to be a rectangular shape Sr that satisfies the condition that the length of the short side portion 4rs is ½ or less of the length of the long side portion 4rm. Therefore, the area corresponding to the rectangular shape Sr in the cover portion 4s is the end surface portion 4f. As described above, if the rectangular shape Sr of the end face portions 4f and 4r is selected so that the length Ls of the short side portions 4rs... Is less than 1/2 of the length Lm of the long side portions 4rm. There is an advantage that the (outer shape) can be easily realized as a flat shape having a small thickness, particularly an ultra-thin shape having a thickness of 5 mm or less.

Furthermore, the casing 4 is entirely formed of a nonmagnetic material. In the case of illustration, the cover portion 4s is integrally formed of a synthetic resin material that is a nonmagnetic material, and the casing body portion 4m is integrally formed of a metal material that is a nonmagnetic material such as a stainless steel material or an aluminum material. In this way, if the casing 4 is formed of a nonmagnetic material, unnecessary leakage of magnetic flux to the casing 4 can be avoided, which can contribute to higher efficiency of the rotary solenoid 1.

Then, at the center position of the cover portion 4s (end surface portion 4f), one bearing portion 5f using a ball bearing, a lubricious resin bearing, a sintered oil-impregnated bearing or the like is disposed, and a bottom surface portion of the casing main body portion 4m. The other bearing portion 5r using the same bearing portion is also disposed at the center position of the (end surface portion 4r). Reference numerals 21 s and 21 t are attachment parts that are integrally formed on both sides in the longitudinal direction of the cover part 4 s and that extend (project) outward from the casing body part 4 m to provide circular holes.

On the other hand, 2 is a magnet rotor part, which is provided with a single round bar-shaped shaft 6 formed of a non-magnetic material such as stainless steel. Thus, if the shaft 6 is formed of a nonmagnetic material, unnecessary leakage of magnetic flux to the shaft 6 can be avoided, so that there is an advantage that it is possible to contribute to further increase in efficiency of the rotary solenoid 1. As shown in FIG. 2, the rear end portion (lower end portion) of the shaft 6 is pivotally supported by the bearing portion 5r described above, and the intermediate portion is supported by the bearing portion 5f described above. That is, the shaft 6 is rotatably supported by the pair of bearing

portions

5f and 5r.

Further, the magnet portion 7 is fixed at an intermediate position in the axial direction Fs on the outer peripheral surface 6f of the shaft 6 located inside the casing 4. The magnet portion 7 is formed as a cylindrical body Mr by a permanent magnet such as a ferrite magnet or a rare earth magnet. Therefore, the illustrated magnet portion 7 as a whole constitutes the magnet main body portion 7m.

The magnet portion 7 (magnet main body portion 7m) magnetizes one of the shafts 6 in the axial direction Fs as the S pole and the other as the N pole. Thereby, the magnetic characteristic of the magnet main body 7m can be utilized to the maximum, and a high magnetic flux density can be obtained in the gap between the stator portions 3s and 3t described later. For example, if a Nd—Fe—B magnet is used as the material, the thickness is set to about 2 [mm], and the gap is set to about 0.25 [mm], a high permeance coefficient of 1 or more can be obtained. In addition, the magnetic flux density in the air gap can be set to 0.5 [T] or more, and a high air gap magnetic flux density can be obtained and the torque can be increased.

FIG. 8 shows the magnetic flux density distribution in the air gap portion according to the magnetization direction of the magnet main body portion 7m. The horizontal axis represents the central angle [°], and the vertical axis represents the magnetic flux density [T]. In FIG. 8, Pa indicates a case where the magnet is magnetized in the axial direction Fs in the present embodiment, and Pr indicates a case where the magnet is magnetized in the radial direction Fd. The dimensions of the magnet body 7m are as follows: the outer diameter is 2 [mm], the inner diameter is 1 [mm], and the height (axial length) is 2 [mm]. By using Nd—Fe—B magnets, (Axial direction) Magnet body 7m magnetized and radial (radial direction) magnet body 7m were prepared. And each solenoid part 1 was comprised using each magnet part 7, and the magnetic flux density of the space | gap part at the time of supplying with electricity to each rotary solenoid 1 was measured.

As a result, although variations occur depending on the design conditions, the magnetic flux density when using the magnet body portion 7m that is axially (axially) magnetized is generally the same as when using the magnet portion 7 that is radially (radially) magnetized. It was confirmed that the total number of magnetic fluxes was increased because the magnetic flux density was about twice as high as the magnetic flux density, and the distribution of the magnetic flux density was rectangular as indicated by Pa in FIG. As described above, by using the magnet main body portion 7m magnetized in the axial direction Fs, it is possible to ensure a high torque and a high holding force during non-energization.

The magnet unit 7 shown in FIG. 2 is formed as a cylindrical body as a whole and is configured as a magnet main body portion 7m. However, the magnet unit 7 is not limited to such a form. Another modification is shown in FIG. FIG. 9A shows the form of FIG. 2 shown for comparison.

FIG. 9 (b) shows a configuration in which the magnet portion 7 is constituted by a magnet main body portion 7m and a separator portion 7s formed of a magnetic material in contact with the axial Fs end of the magnet main body portion 7m. . Separator part 7s can be formed in a cylindrical shape using soft magnetic materials, such as SPCC, SECC, and a silicon steel plate. As described above, the magnet unit 7 includes a magnet main body 7m as shown in FIG. 9B and a separator 7s using a magnetic material in contact with the axial Fs end of the magnet main body 7m. Alternatively, it may be configured only by the magnet main body portion 7m as shown in FIG. 2 (FIG. 9A). Therefore, the degree of freedom in design can be increased from the viewpoint of the assembly mode of the magnet body 7m, and the target rotary solenoid 1 corresponding to the specifications can be easily obtained.

If such a separator portion 7s is used, the separation distance in the axial direction Fs between a pair of rotor yokes 12f and 12r described later can be increased, and magnetic flux leakage can be reduced. In addition, correspondingly, a separation distance between a pair of yoke body portions 16sf... And 16sr... Described later can be increased, so that a sufficient winding space can be secured and power consumption can be reduced. . In the case of a magnet material having a relatively low magnetic property such as a ferrite magnet, it is desirable not to use the separator portion 7s. On the other hand, in the case of a magnet material having a relatively high magnetic property such as a rare earth magnet, the separator portion 7s is not provided. The configuration to be used is desirable. Thereby, an excessive current to the coils 9s and 9t can be avoided, and an excessive holding force can be avoided.

In the modified example shown in FIG. 9C, the magnet main body 7m is formed by an arc body Ms that covers a part of the circumference of the outer peripheral surface 6f of the shaft 6 in the circumferential direction Ff. The magnet portion 7 shown in FIG. 2A and FIG. 2 is different from the magnet portion 7m formed by the cylindrical body Mr that covers the entire circumference of the outer peripheral surface 6f of the shaft 6 in the circumferential direction. In the case of this modification, the attachment position and the cross-sectional shape of the magnet main body 7m can be made to correspond to the positions and shapes of rotor yokes 12f and 12r described later. The overall shape of the magnet main body 7m is not necessarily formed by the cylindrical body Mr or the circular arc body Ms, and may be a rectangular parallelepiped shape or a plate shape.

Thus, the magnet body 7m may be formed by the cylindrical body Mr that covers the entire circumference of the outer peripheral surface 6f of the shaft 6 or a part of the circumference of the outer peripheral surface 6f of the shaft 6 in the circumferential direction. The degree of freedom in design can be increased from the viewpoint of the shape of the magnet main body 7m, and the design freedom can be further increased by combining with the assembly of the magnet main body 7m. The degree can be increased.

On the other hand, on both sides in the axial direction Fs of the magnet portion 7, a pair of rotor yokes 12 f and 12 r are provided that protrude in the radial direction Fd from the shaft 6 and are formed in the circumferential direction Ff over a predetermined angular range Za. Each rotor yoke 12f, 12r is formed of a soft magnetic material such as SPCC, SECC, silicon steel plate, etc., and as shown in FIGS. 1 and 9 (a), shaft attachment portions 12fc, 12rc formed in ring shapes, Fan-shaped (arc-shaped) rotor yoke main body portions 12fm and 12rm are formed integrally with the periphery of the shaft mounting portions 12fc and 12rc. Accordingly, the rotor yoke main body portions 12fm and 12rm project from the shaft 6 in the radial direction Fd and are formed in the circumferential direction Ff over a predetermined angular range Za. In the case of illustration, 120 [°] was selected as the angle range Za, and about 0.5 [mm] was selected as the plate thickness. Thereby, when it combines with the

stoppers

17s and 17t mentioned later, the rotation range Zr of the magnet rotor part 2 can be set to 60 degrees. In addition, by selecting the thickness of the rotor yokes 12f and 12r in the axial direction Fs to be smaller than the length of the magnet portion 7 in the axial direction Fs, a small magnetic circuit can be configured, and magnetic leakage between the rotor yokes 12f and 12r is reduced. be able to.

The rotor yokes 12f and 12r shown in FIG. 1 show the case where 120 [°] is selected as the predetermined angle range Za, but the predetermined angle range Za is not limited to such an angle mode. . Another modification is shown in FIG.

FIG. 10 (a) shows an example in which the angle range Za is selected to be 135 [°], and FIG. 10 (b) shows an example in which the angle range Za is selected to be 90 [°]. Accordingly, when compared with the rotor yokes 12f and 12r in FIG. 1, the rotation range Zr of the magnet rotor portion 2 in FIG. 10A is 45 °, and the rotation of the magnet rotor portion 2 in FIG. The moving range Zr is 90 [°].

In this case, it is desirable to select the predetermined angle range Za from 80 to 140 [°]. As a result, it is possible to avoid destabilization of the attracting action and the repulsive action on the stator parts 3s, 3t side, so that the operation related to the reciprocating rotational displacement of the magnet rotor part 2 can be ensured and the necessary drive output is obtained. The rotation range Zr can be secured.

By the way, the shape of the rotor yoke main body portions 12fm and 12rm, particularly the dimension in the radial direction Fd, is related to the dimension selection of the casing 4. That is, the pair of end surface portions 4f and 4r in the casing 4 is selected to have the rectangular shape Sr described above. At this time, the position of the side surface portion 4p in the casing 4 extending in a right angle direction from at least one long side portion 4rm. Is selected as a proximity position Xs that allows rotation of the magnet rotor unit 2, specifically, the rotor yokes 12f and 12r. Therefore, as shown in FIG. 7, the clearance Lc between the leading edge of the rotor yokes 12f and 12r and the side surface portion 4p of the casing 4 should be a slight clearance considering only the conditions that allow the rotation of the rotor yokes 12f and 12r. It's enough. Specifically, as the proximity position Xs, a gap Lc between the side surface portion 4p of the casing 4 and the rotor yokes 12f and 12r in the magnet rotor portion 2 is relative to a gap portion between the rotor yokes 12f and 12r and a magnetic pole piece portion 16sfp to be described later. Thus, if it is selected within the range of 1 to 10 times, it is possible to enjoy the effectiveness for obtaining an ultra-thin shape while ensuring the necessary torque and assemblability.

In addition, 22f is an outer separator integrally formed in a ring shape by a lubricating resin material or a nonmagnetic material metal material interposed between the rotor yoke 12f and the bearing portion 5f, and 22r is formed in the same manner as the outer separator 22f. The outer separator is interposed between the rotor yoke 12r and the bearing portion 5r.

Further, on the inner surface 4qi of the other side surface portion 4q facing the side surface portion 4p in the casing 4,

stoppers

17s and 17t that are locked to the rotor yokes 12f and 12r and restrict the rotation range Zr are integrally provided. In this case, as shown in FIG. 1, by fixing the stopper member 23 integrally formed in a U-shape with a nonmagnetic material such as a synthetic resin material to the inner surface 4qi of the side surface portion 4q,

Stoppers

17s and 17t projecting from the inner surface 4qi of the portion 4q in a right angle direction can be arranged, and the shaft attachment portions 12fc and 12rc in the rotor yokes 12f and 12r can be positioned between the

stoppers

17s and 17t. At this time, the tip surfaces of the

stoppers

17s and 17t are preferably positioned at the center position in the short side direction of the end surface portions 4s, but this position can be changed. Therefore, the stop position can be easily changed by changing the stopper member 23.

Thereby, if one end side of the rotor yokes 12f, 12r is locked to the stopper 17s, the rotational displacement to one side is restricted, and if the other end side of the rotor yokes 12f, 12r is locked to the stopper 17t, the rotation to the other side is restricted. Dynamic displacement is regulated. If

such stoppers

17s and 17t are provided, the shape of the rotor yokes 12f and 12r can be used as a direct contact portion. Therefore, a stopper mechanism that restricts the rotation range Zr can be easily achieved only by adding the

stoppers

17s and 17t. Can be built. Further, by using the dead space, there is an advantage that a small stopper mechanism that can be disposed inside the casing 4 can be constructed, and that the stop position can be highly accurate.

On the other hand, a pair of left and right stator portions 3s and 3t are provided on both sides of the magnet rotor portion 2 in the radial direction Fd. That is, the stator portions 3s and 3t are disposed in the internal spaces Rs and Rt of the casing 4 on both sides in the radial direction Fd of the magnet rotor portion 2 and on both sides in the longitudinal direction of the end face portions 4f. Thus, since the stator portion 3s, the magnet rotor portion 2, and the stator portion 3t can be arranged along a straight line, the rotary solenoid 1 whose overall shape (outer shape) is a thin flat shape is also provided. It can be reasonably realized from the viewpoint of layout.

Further, each of the stator portions 3s, 3t includes coils 9s, 9t attached to stator yokes 8s, 8t fixed to the casing 4. In this case, the coils 9s and 9t are manufactured by winding a magnet wire such as an annealed copper wire into a cylindrical shape. Further, the stator yokes 8s and 8t are loaded at the center positions of the coils 9s and 9t, and are arranged in parallel to the shaft 6, and both ends are fixed to the casing 4, that is, one end is fixed to one end surface portion 4f, and the other end Core portions 15s and 15t fixed to the other end surface portion 4r, and on both sides of the coils 9s and 9t in the axial direction Fs of the core portions 15s and 15t, projecting in the radial direction Fd from the core portions 15s and 15t, and the rotor yoke 12f, A pair of yoke main body portions 16sf, 16tf, 16sr, and 16tr facing the circumferential surface of 12r are provided. Each yoke main body 16sf, 16tf, 16sr, 16tr can be formed in the same shape using a soft magnetic material such as SPCC, SECC, silicon steel plate or the like.

If the stator yokes 8s and 8t are configured in this way, a simple magnetic circuit matching the form of the magnet rotor portion 2 can be constructed, so that unnecessary magnetic loss can be eliminated and the efficiency of the rotary solenoid 1 can be improved. Torque variation can be reduced. Further, since the stator yokes 8s and 8t are configured as described above, the core portions 15s and the yoke body portions 16sf and 16sr can be integrally formed by casting or the like. In this case, there is an advantage that the cost can be reduced by reducing the number of parts.

As shown in FIGS. 1 and 2, one yoke body portion, for example, the yoke body portion 16 sf, includes a rectangular shape portion 16 sfm that partitions the internal space Rs in the axial direction Fs, and a magnet rotor portion from one end of the rectangular shape portion 16 sfm. The magnetic pole piece portion 16sfp protruding to the second side is integrally formed. The tip of the magnetic pole piece 16sfp is formed as a concave arc edge and is opposed to the rotor yoke 12f. The magnetic pole piece portion 16sfp is a half portion in the short side direction of the end surface portion 4r and is formed closer to the side surface portion 4p.

Thereby, when the magnet rotor part 2 is rotationally displaced and the tip (peripheral part) of the rotor yoke 12f faces the magnetic pole piece part 16sfp, the peripheral part of the rotor yoke 12f passes through the gap part and the magnetic pole piece part 16sfp. Proximity to. The other yoke body portions 16sr, 16tf, and 16tr can be the same as the yoke body portion 16sf.

It should be noted that the circumferential lengths of the portions of the stator yokes 8s, 8t facing the rotor yokes 12f are desirably smaller than the circumferential lengths of the rotor yokes 12f in a predetermined angular range Za. Thereby, sufficient holding torque at the time of deenergization is securable. It is desirable that the distance between the left and right stator yokes 8s and 8t be smaller than the circumferential length of the rotor yoke 12f. Thereby, it can comprise as a rotary solenoid which has a bidirectional | two-way latch function which is hard to stop at a dead zone position even at the time of non-energization. Furthermore, it is desirable that the pair of left and right coils 9s and 9t be connected in series. As a result, electrical connection such as lead wires can be suppressed to a minimum of two, which can contribute to miniaturization. In this case, when the coils 9s and 9t are energized, the magnetic poles (N pole and S pole) generated on the left and right by the coils 9s and 9t are opposite.

Therefore, according to such a rotary solenoid 1 according to the present embodiment, as a basic configuration, the magnet rotor portion 2 uses the magnet portion 7 in which one of the shafts 6 in the axial direction Fs is the S pole and the other is the N pole. A pair of rotor yokes 12f and 12r projecting from the shaft 6 in the radial direction Fd and formed in the circumferential direction Ff over a predetermined angular range Za are provided on both sides of the magnet portion 7 in the axial direction Fs, and the bearing portions 5f and A pair of opposite end face parts 4f, 4r in the casing 4 provided with 5r is selected to be a rectangular shape Sr, and the position of the side face part 4p in the casing 4 extending in a right angle direction from at least one long side part 4rm is The overall shape of the rotary solenoid 1 is selected because the proximity position Xs that allows the rotation of the rotor portion 2 is selected. The contour), a thin flat shape with a thickness of, in particular, can be easily realized by a thickness of 5 mm. The following ultra-thin shape. As a result, it can be arranged in a narrow space such as a gap between parts, and can correspond to various arrangement spaces, so that versatility can be greatly improved. In addition, if the structure which concerns on this embodiment is used, the ultra miniaturization which becomes still lower height is also possible by shortening the length of the magnet part 7 and the coils 9s and 9t in the axial direction Fs.

Further, since the magnet rotor portion 2 uses the magnet portion 7 in which one in the axial direction Fs of the shaft 6 is the S pole and the other is the N pole, a sufficient magnetic flux in the magnet portion 7 can be secured. As a result, even when the rotary solenoid 1 is made extremely thin, sufficient necessary torque can be secured.

Next, the operation of the rotary solenoid 1 according to this embodiment will be described with reference to FIGS.

6, it is assumed that the magnet portion 7 of the illustrated magnet rotor portion 2 is magnetized with an N pole on the upper side and an S pole on the lower side. As a result, the upper rotor yoke 12f becomes the N pole, and the lower rotor yoke 12r becomes the S pole. Now, if the right side coil 9t shown in FIG. 6 is energized in the positive direction, the stator yoke 8t is excited, and the magnetic lines of force, as shown by the dotted arrows in FIG. 6, are the core portion 15t → the yoke body portion 16tr → the rotor yoke 12r. It occurs in the path of the magnet part 7 → the rotor yoke 12f → the yoke body part 16tf → the core part 15t. As a result, an S pole is generated in the upper yoke body portion 16tf, and an N pole is generated in the lower yoke body portion 16tr. At the same time, the left coil 9s shown in FIG. 6 is energized in the reverse direction to excite the stator yoke 8s, thereby generating an N pole in the upper yoke body portion 16sf and the lower yoke. An S pole is generated in the main body portion 16sr.

As a result, the right stator portion 3t is in an attracted state and the left stator portion 3s is in a repulsive state with respect to the upper rotor yoke 12f and the lower rotor yoke 12r. Rotate and displace clockwise 7 stops at the position of the rotor yoke 12fx... Indicated by the phantom line, that is, the position where the right end of the rotor yoke 12fx. When stopped, even if energization is canceled, the rotor yokes 12fx are attracted to the yoke body portions 16tf, and the stopped state is maintained by the self-holding function.

On the other hand, in this state, when energization switching is performed and the left coil 9s is energized in the positive direction, the stator yoke 8s is excited, the S pole is generated in the upper yoke body portion 16sf, and the lower yoke body portion. An N pole is generated at 16 sr. At the same time, the right coil 9t is energized in the reverse direction. Thus, when the stator yoke 8t is excited, an N pole is generated in the upper yoke body portion 16tf and the lower yoke body portion 16tr. S pole is generated.

Accordingly, the left stator portion 3s is in an attracted state and the right stator portion 3t is in a repulsive state with respect to the upper rotor yoke 12f and the lower rotor yoke 12r. Rotate and displace clockwise 7 stops at the position of the rotor yoke 12fy... Shown by the solid line, that is, the position where the left end of the rotor yoke 12fy. When stopped, even if energization is canceled, the rotor yokes 12fy are attracted to the yoke body portions 16sf, and the stopped state is maintained by the self-holding function. In the case of the example, since the angle range Za of the rotor yokes 12f is selected to be 120 [°], the rotation range Zr is 60 [°].

The illustrated rotary solenoid 1 has dimensions as follows: the diameter of the shaft 6 is 1 [mm], the outer diameter of the magnet portion 7 is 1.8 [mm], and the radius of the rotor yoke 12f is 1.5 [mm]. As a result, the thickness (dimension in the width direction) of the casing 4 can be configured as an ultra-thin shape having a thickness of 3.9 [mm], in comparison with a general circular rotary solenoid having an outer diameter of 7 [mm]. It was confirmed that the output torque was equivalent.

In addition, in FIG. 11, the example of a change of the casing 4 is shown. In the rotary solenoid 1 shown in FIGS. 1 and 2 described above, when the casing 4 is configured, the cover portion 4s is integrally formed of a synthetic resin material, and the casing main body portion 4m is integrally formed of a metal material. In the modification shown in FIG. 11, the entire casing 4, that is, both the cover portion 4 s and the casing main body portion 4 m are formed of a synthetic resin material that is a nonmagnetic material.

In the case of illustration, the bearing

portions

5f and 5r are integrally formed on the cover portion 4s and the casing main body portion 4m. Further, the

stoppers

17s and 17t do not appear in the drawing, but can be integrally formed on the inner surface of the casing body 4m. In addition, in the configuration of FIG. 11, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals to clarify the configuration, and the detailed description thereof is omitted.

As described above, the best embodiment including the modified example has been described in detail. However, the present invention is not limited to such an embodiment, and the configuration, shape, material, quantity, numerical value, and the like of the present invention are not limited thereto. Changes, additions and deletions can be made arbitrarily without departing from the scope.

For example, in the embodiment, one core portion 15s and one coil 9s are arranged on one stator portion 3s, but a plurality of core portions 15s and a plurality of coils 9s are arranged. Therefore, it may be configured in a multiple manner and arranged in the longitudinal direction of the rectangular shape Sr, and the quantity is not limited. In addition, in the rectangular shape Sr of the end face portions 4f and 4r, it is desirable to select the length Ls of the short side portions 4rs... Less than 1/2 of the length Lm of the long side portions 4rm. The case is not excluded. Furthermore, it is desirable to form the casing 4 and / or the shaft 6 from a nonmagnetic material, but it is not an essential component. On the other hand, an example in which the

stoppers

17s and 17t are arranged inside the casing 4 has been described. However, the case where the

stoppers

17s and 17t are separately provided outside the casing 4 is not excluded. Note that the rectangular shape Sr is not only a pure rectangle, but also includes a similar shape such as a long side 4rm having two sides or a curved shape.

The rotary solenoid according to the present invention uses its reciprocating rotational property to sort money and banknotes, sort mails, etc., switch the transport path of printed matter, switch the optical path of optical equipment, ion shutter of semiconductor manufacturing equipment, etc. Can be used for various applications in many fields.

Claims

A magnet rotor part having a magnet part in the middle position of a shaft rotatably supported by a bearing part provided in the casing, and a stator yoke arranged on both sides in the radial direction of the magnet rotor part and fixed to the casing A rotary solenoid comprising a pair of stator parts having a coil, wherein a magnet part in which one of the shafts in the axial direction of the shaft is an S pole and the other is an N pole is used as the magnet rotor part. A pair of rotor yokes projecting in a radial direction from the shaft and formed in a circumferential direction over a predetermined angular range are provided on both sides in the axial direction of the portion, and a pair of opposing end surface portions of the casing in which the bearing portion is provided Select a rectangular shape and extend in a direction perpendicular to at least one of the long sides. Rotary solenoid, characterized in that the position of the side surface portion of the casing, formed by selecting the close position to permit rotation of the magnet rotor unit.
2. The rotary solenoid according to claim 1, wherein the rectangular shape is selected such that the length of the short side portion is ½ or less of the length of the long side portion.
2. The rotary solenoid according to claim 1, wherein the pair of stator portions are disposed in an inner space of the casing on both sides in the radial direction of the magnet rotor portion and on both sides in the longitudinal direction of the end face portion.
The stator yoke is loaded at the center position of the coil and arranged in parallel with the shaft, and both ends of the core are fixed to the casing, and the core is disposed on both sides of the coil in the axial direction of the core portion. 4. The rotary solenoid according to claim 1, further comprising a pair of yoke main body portions protruding in a radial direction from the portion and facing a peripheral surface of the rotor yoke.
The rotary solenoid according to claim 1, wherein the casing is made of a non-magnetic material.
6. The casing according to claim 1, wherein a pair of stoppers that are locked to the rotor yoke and restrict a rotation range are integrally provided on an inner surface of the other side surface portion that faces the side surface portion. Rotary solenoid.
The rotary solenoid according to claim 1, wherein the predetermined angle range is selected from 80 to 140 [°].
2. The rotary solenoid according to claim 1, wherein the shaft is formed of a nonmagnetic material.
The rotary solenoid according to claim 1, wherein the magnet part is constituted by a magnet main body part and a separator part using a magnetic material in contact with an axial end of the magnet main body part.
10. The rotary solenoid according to claim 9, wherein the magnet part is constituted only by a magnet body part.
The rotary solenoid according to claim 9 or 10, wherein the magnet main body is formed of a cylindrical body that covers the entire circumference of the outer circumferential surface of the shaft in the circumferential direction.
11. The rotary solenoid according to claim 9, wherein the magnet main body is formed by an arc body that covers a part of the circumference of the outer circumferential surface of the shaft.