JPWO2018078848A1 - Rotary solenoid - Google Patents

Abstract

Stator core portions 8s and 8t having coils 9s and 9t mounted on both sides in the radial direction Fd of the magnet portion 7 and the magnet rotor portion 2 having the magnet portion 7 provided with the S pole and the N pole in the radial direction Fd of the shaft 6. Are provided with a pair of stator portions 3s and 3t, one end 8sp and 8tp facing the magnet portion 7 and the other end 8sj and 8tj coupled to the casing 4 also serving as a yoke, and bearing portions 5f and 5r. The pair of opposing end face portions 4f and 4r in the casing 4 is selected as a rectangular shape Sr that satisfies the condition that the length Ls of the short side portion 4rs... Is less than or equal to ½ of the length Lm of the long side portion 4rm. In addition, the position of the side surface portion 4p in the casing 4 extending in a right angle direction from at least one of the long side portions 4fm is set to a proximity position Xs that allows the magnet rotor portion 2 to rotate. A constant.

Description

  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 When the hole and the through hole are inserted from one end opening, the wire end can be connected to the wire connection. Pin having an intermediate mounting portion that can be stopped at the final position where the position and wire connection portion are shielded by the barrier portion in the coil bobbin, and having a pin body portion protruding from the other end opening of the through hole portion at the final position And a terminal.

JP 2001-292557 A JP 2012-039804 A

  However, the conventional rotary solenoid including the rotary solenoid disclosed in Patent Document 1 and Patent Document 2 described above has 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.

  Secondly, since the rotary solenoid reciprocally rotates and displaces at two positions, a pair of stoppers for restricting the rotation displacement to the 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. .

  An object of the present invention is 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 rotary solenoid 1 having a pair of stator portions 3s having coils 9s attached to a stator core portion 8s fixed to the casing 4 and disposed on both sides in the radial direction Fd of the portion 2, One end of a stator core portion 8s, 8t having coils 9s, 9t mounted on both sides of the magnet rotor portion 2 having the magnet portion 7 having the S pole and the N pole in the radial direction Fd and the radial direction Fd of the magnet portion 7. A pair of stator parts formed by connecting 8sp and 8tp to the magnet part 7 and connecting the other ends 8sj and 8tj to the casing 4 also serving as a yoke s, 3t, and a pair of opposing end surface portions 4f, 4r in the casing 4 provided with the bearing portions 5f, 5r, the length Ls of the short side 4rs ... is 1 of the length Lm of the long side 4rm ... Is selected as a rectangular shape Sr that satisfies the condition of ≦ 2, and 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 4fm is used to rotate the magnet rotor portion 2. It is characterized by being selected as an allowable proximity position Xs.

  In this case, according to a preferred aspect of the invention, the gap Lc between the side surface portion 4p of the casing 4 and the magnet portion 7 of the magnet rotor portion 2 is the gap between the magnet portion 4 and the stator core portion 8s (8t) as the proximity position Xs. A range of 1 to 10 times the portion Lg can be selected. On the other hand, the pair of stator portions 3s and 3t can be disposed 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 surface portions 4f and 4r. Moreover, the casing 4 can form part or all of the casing 4 including a part where at least the stator core parts 8s and 8t are joined and a part where the bearing parts 5f and 5r are provided with a magnetic material. Further, the casing 4 is integrally provided with a pair of stoppers 17s and 17t that are locked to the magnet rotor portion 2 side and restrict the rotation range Zr on the inner surface 4qi of the other side surface portion 4q facing the side surface portion 4p. be able to. The shaft 6 is preferably formed from a magnetic material. On the other hand, the magnet portion 7 can be formed by a cylindrical body Mr that covers the entire circumference of the outer circumferential surface 6f of the shaft 6 or a circular arc body Ms that covers a part of the circumference of the outer circumferential surface 6f of the shaft 6 in the circumferential direction. Can also be formed. At this time, it is desirable that the magnet part 7 should be selected so that the dimension in the axial direction Fs is longer than the dimension in the axial direction Fs in the stator core part 8s (8t), and the dimension in the circumferential direction Ff per pole on the outer peripheral surface. Is preferably selected to be longer than the dimension in the circumferential direction Ff of the stator core portion 8s (8t) facing the magnet portion 7.

  According to the rotary solenoid 1 according to the present invention having such a configuration, the following remarkable effects can be obtained.

  (1) A stator core portion having a magnet portion 7 having a magnet portion 7 provided with an S pole and an N pole in the radial direction Fd of the shaft 6 and a stator core portion provided on both sides of the magnet portion 7 in the radial direction Fd and fitted with coils 9s and 9t. 8s and 8t are provided with a pair of stator parts 3s and 3t in which one ends 8sp and 8tp are opposed to the magnet part 7 and the other ends 8sj and 8tj are coupled to the casing 4 also serving as a yoke, and bearing parts 5f, The rectangular Sr that satisfies the condition 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. ..., and 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 4fm ... is a proximity position that allows rotation of the magnet rotor portion 2. Since formed by selecting the Xs, the overall shape of the rotary solenoid 1 (outer shape), a thin flat shape with a thickness of, in particular, it can be easily realized by a thickness of 5 mm. The following ultra-thin shape. As a result, it is possible to deal with various arrangement spaces, such as being able to arrange in a narrow space such as a gap between parts, and the versatility can be greatly improved.

  (2) According to a preferred mode, as the proximity position Xs, the gap Lc between the side surface portion 4p of the casing 4 and the magnet portion 7 of the magnet rotor portion 2 is a gap portion Lg between the magnet portion 4 and the stator core portion 8s (8t). On the other hand, if it is selected within a 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.

  (3) According to a preferred embodiment, if the pair of stator portions 3s and 3t are arranged 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 and 4r, the stator portion 3s and the magnet Since the 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 can be reasonably realized from the viewpoint of layout.

  (4) According to a preferred embodiment, when the casing 4 is configured, a part or all of the casing 4 including at least a portion where the stator core portions 8s and 8t are coupled and a portion where the bearing portions 5f and 5r are provided is formed of a magnetic material. In addition, if the shaft 6 is formed of a magnetic material, a simple magnetic circuit using the casing 4 and the shaft 6 can be easily configured, and the reduction in the number of parts can contribute to further miniaturization and cost reduction.

  (5) According to a preferred embodiment, a pair of stoppers 17s and 17t that are engaged with the inner surface 4qi of the other side surface portion 4q facing the side surface portion 4p of the casing 4 and are locked to the magnet rotor portion 2 side to regulate the rotation range Zr. Since the magnet rotor portion 2 side can be used as a direct contact portion, it is possible to easily construct a stopper mechanism that restricts the rotation range Zr only by adding stoppers 17s, 17t and the like. 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.

  (6) According to a preferred embodiment, the magnet portion 7 may be formed of a cylindrical body Mr that covers the entire circumference in the circumferential direction of the outer peripheral surface 6 f of the shaft 6, or one of the circumferential directions on the outer circumferential surface 6 f of the shaft 6. Since the degree of freedom in design can be increased from the viewpoint of the shape of the magnet portion 7 such that it may be formed by the circular arc body Ms covering the periphery of the portion, the target rotary solenoid 1 corresponding to the specifications can be easily obtained. Can do.

  (7) If the dimension of the axial direction Fs of the magnet part 7 is selected longer than the dimension of the axial direction Fs in the stator core part 8s (8t) according to a preferred aspect, the magnet part 7 and the stator core part 8s (8t) The torque can be relatively increased from the dimensional relationship.

  (8) According to a preferred embodiment, the dimension in the circumferential direction Ff per pole on the outer peripheral surface of the magnet part 7 is selected to be longer than the dimension in the circumferential direction Ff in the stator core part 8s (8t) facing the magnet part 7. Then, certainty and stability at the time of starting can be ensured.

FIG. 2 is a cross-sectional plan view of the rotary solenoid according to the first embodiment of the present invention (cross section taken along line AA in FIG. 2); Sectional front view of the rotary solenoid, Sectional plan view of the rotary solenoid (cross section taken along line BB in FIG. 2), Cross-sectional right side view of the rotary solenoid, Magnetic circuit diagram of the rotary solenoid, External front view of the rotary solenoid, External side view of the rotary solenoid, External side view showing a modification example of the casing in the rotary solenoid, FIG. 10 is a cross-sectional plan view of the rotary solenoid according to the modified example of the first embodiment (cross-sectional view taken along the line CC in FIG. 10); Sectional front view of the rotary solenoid, FIG. 12 is a cross-sectional plan view of the rotary solenoid according to the second embodiment of the present invention (cross section taken along the line DD in FIG. 12); Sectional front view of the rotary solenoid, Cross-sectional right side view of the rotary solenoid, External bottom view of the rotary solenoid, Action explanatory view using a sectional plan view of the rotary solenoid, Magnetic circuit diagram of the rotary solenoid,

  1: Rotary solenoid, 2: Magnet rotor part, 3s: Stator part, 3t: Stator part, 4: Casing, 4f: End face part, 4r: End face part, 4p: Side face part, 4q: Side face part, 4qi: Side face part Inner surface, 4rs ...: short side portion, 4rm ...: long side portion, 5f: bearing portion, 5r: bearing portion, 6: shaft, 6f: outer peripheral surface of shaft, 7: magnet portion, Fd: radial direction, Fs: shaft Direction, Ff: circumferential direction, 8s: stator core part, 8t: stator core part, 8sp: one end of stator core part, 8tp: one end of stator core part, 8sj: other end of stator core part, 8tj: other end of stator core part, 9s: coil , 9t: Coil, 17s: Stopper, 17t: Stopper, Ls: Length of short side, Lm: Length of long side, Lc: Side surface and magnet rotor in casing Gap between Gunetto section, Lg: the gap portion between the magnet part and the stator core, Sr ...: rectangular, Xs: the close position, Zr: rotational range, Mr: cylinder, Ms: arc

  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 first embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 to 4, the rotary solenoid 1 according to the first embodiment includes a casing 4 having a flat rectangular parallelepiped shape, and the casing 4 is a U-shaped casing upper half part opened downward. 4m and a U-shaped casing lower half part 4m opened upward. Thereby, the horizontal intermediate part of the casing upper half part 4s becomes one end face part 4f in the casing 4, and the horizontal intermediate part of the casing lower half part 4m becomes the other end face part 4r of the casing 4. Thereby, a pair of opposite end surface parts 4f and 4r are comprised. Then, as shown in FIG. 3, the shape of the end face portion 4f (4r) is a rectangular shape Sr that satisfies the condition that the length Ls of the short side portion 4fs is ½ or less of the length Lm of the long side portion 4fm. Select

  Further, the casing upper half 4s and the casing lower half 4m also serve as the yokes of the stators 3s and 3t, and therefore, an electromagnetic steel plate made of a soft magnetic material such as SPCC, SECC, or silicon steel plate is integrally formed by pressing. . In addition, a soft magnetic material may be formed by forging or the like. Furthermore, at the center position of the casing upper half part 4s (end face part 4f), one bearing part 5f using a lubricating resin bearing, a sintered oil-impregnated bearing, a ball bearing or the like is disposed, and the casing lower half body The other bearing portion 5r using the same bearing portion is also arranged at the center position of the bottom surface portion (end surface portion 4r) of the portion 4m. In addition, since it is a rotary solenoid having reciprocating rotation, a circular hole bearing portion molded integrally with the casing 4 can also be used.

  On the other hand, 8s and 8t are stator core parts interposed between the casing upper half part 4s and the casing lower half part 4m. The stator core portions 8s and 8t also serve as part of the casing 4. The stator core portions 8s and 8t are integrally formed by pressing a magnetic steel plate made of a soft magnetic material such as SPCC, SECC, silicon steel plate, and the like, similar to the casing upper half portion 4s. In addition, a soft magnetic material may be formed by forging or the like. The stator core portions 8s and 8t have one end side opposed to a magnet rotor portion 2 described later and the other end side sandwiched between the casing upper half portion 4s and the casing lower half portion 4m. Coils 9s and 9t are mounted on the outer surfaces of the stator core portions 8s and 8t. The coils 9s and 9t can be manufactured by winding a magnet wire such as an annealed copper wire into a cylindrical shape. The pair of left and right coils 9s and 9t are preferably connected in series. As a result, the number of electrical connections such as lead wires can be suppressed to a minimum of two, which can contribute to miniaturization.

  The outer surfaces of the stator core portions 8s and 8t are subjected to an insulating coating process such as resin electrodeposition or powder electrostatic coating to prevent a short circuit with the coils 9s and 9t. Thus, one stator part 3s including the stator core part 8s and the coil 9s and the other stator part 3t including the stator core part 8t and the coil 9t are configured. In this case, the shortest distance between the left and right stator core portions 8s and 8t is set to be smaller than the circumferential length due to the angular range of the magnet portion 7 (180 [°] in the example). 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.

  The casing upper half part 4s, the stator core parts 8s and 8t and the casing lower half part 4m formed in this way can be assembled using the outer cover 21. As shown in FIG. 7, the outer cover 21 is formed by bending the whole into a U-shape, and includes a side surface portion 4 p that is one side surface portion constituting the casing 4, one end surface portion 4 f, and the other side surface portion. Is covered with the other end surface portion 4r by providing bent pieces 4kp and 4kq at the tip. As a result, the entire casing 4 that also serves as a yoke in which the other ends 8sj and 8tj of the pair of stator core portions 8s and 8t are interposed between the casing upper half portion 4s and the casing lower half portion 4m is held and fixed by the outer cover 21. . Therefore, as shown in FIG. 8, the outer cover 21 can be mounted with its direction reversed.

  The outer cover 21 can be formed using a nonmagnetic steel plate such as a stainless steel material or an aluminum material, a nonmagnetic synthetic resin, or the like. Since the outer cover 21 covers the pair of side surface parts 4p and 4q located on the long side part 4fm... Of the end face part 4f..., The part close to the magnet rotor part 2 described later is a nonmagnetic surface.

  In addition to the holding and fixing function, the outer cover 21 has a positioning function for positioning the casing upper half part 4s, the casing lower half part 4m, and the stator core parts 8s and 8t. FIG. 6 shows a cover surface 21p of the outer cover 21 that covers the side surface portion 4p (the same applies to the side surface portion 4q side). In the cover surface 21p, positioning notch recesses 22u, 22d, 22p and 22q are formed at the center positions of the upper side, the lower side, the right side and the left side, as well as the casing upper half 4s and the casing lower side. Engaging protrusions 23u, 23d, 23p, and 23q for positioning that fit into the notch recesses 22u, 22d, 22p, and 22q are formed in the half body portion 4m and the stator core portions 8s, 8t, respectively, and the upper notch recess 22u. Engage the engaging convex part 23u of the casing upper half part 4s, the engaging convex part 23d of the casing lower half part 4m into the lower notch concave part 22d, and the engagement of one stator core part 8s with the right notch concave part 22p. The convex portion 23p can be positioned by fitting (engaging) the engaging convex portion 23q of the other stator core portion 8t into the left cutout concave portion 22q. In addition, it can fix by performing crimping with respect to the pressing piece etc. which were integrally formed in the outer cover 21 after an assembly | attachment.

  Thus, when the casing 4 is configured, all (or a part) of the casing 4 including at least a portion where the stator core portions 8s and 8t are coupled and a portion where the bearing portion 5r is provided, that is, the casing upper half portion 4s and If the lower half 4m of the casing is formed as a yoke with a magnetic material and the shaft 6 is formed with a magnetic material, a simple magnetic circuit using the casing 4 and the shaft 6 can be easily configured, and the number of parts can be reduced. There is an advantage that it can contribute to further miniaturization and cost reduction.

  On the other hand, 2 is a magnet rotor part, and is provided with a round bar-shaped shaft 6 formed of a soft magnetic material. As shown in FIG. 2, the rear end portion (lower end portion) of the shaft 6 is 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.

  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 of a cylindrical body Mr that covers the entire circumference of the outer circumferential surface 6f of the shaft 6 in the circumferential direction by a permanent magnet such as a ferrite magnet or a rare earth magnet. The magnet unit 7 magnetizes the S pole and the N pole in the radial direction Fd of the shaft 6. In other words, the magnet portion 7 is formed entirely by the cylindrical body Mr, but substantially, as shown in FIG. 1, two semicircular shapes in which the magnetic pole on the outer peripheral surface and the magnetic pole on the inner peripheral surface are opposite to each other. These magnets are combined to form a cylindrical body Mr. By magnetizing in this way, the magnetic characteristics of the magnet part 7 can be utilized to the maximum, and a higher magnetic flux density can be obtained in the gap Lg described later. If an Nd—Fe—B magnet is used, a high magnetic flux density in the gap Lg can be ensured and torque can be increased.

  Moreover, the dimension of the axial direction Fs of the magnet part 7 is selected longer than the dimension of the axial direction Fs in the stator core part 8s (8t) as shown in FIG. Thereby, torque can be relatively increased from the dimensional relationship between the magnet portion 7 and the stator core portion 8s (8t). Furthermore, as shown in FIG. 1, the dimension in the circumferential direction Ff per pole on the outer circumferential surface of the magnet unit 7 (in the example, ½ of the entire outer circumference) is the stator core unit 8s ( 8t) is selected to be longer than the dimension in the circumferential direction Ff. Thereby, it is possible to secure a sufficient holding torque at the time of non-energization and to ensure the certainty and stability at the time of starting.

  By the way, the shape of the magnet rotor part 2, in particular, 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 above-described rectangular shape Sr. At this time, the position of the side surface portion 4p in the casing 4 extending in a perpendicular direction from at least one long side portion 4fm. Is selected as a proximity position Xs that allows rotation of the magnet rotor portion 2. Therefore, as shown in FIG. 1, the clearance Lc between the outer peripheral surface of the magnet portion 7 of the magnet rotor portion 2 and the side surface portion 4p of the casing 4 is a slight clearance considering the conditions that allow the rotation of the magnet rotor portion 2 to be allowed. It is enough to secure.

  Specifically, as the proximity position Xs, a gap Lc between the side surface portion 4p of the casing 4 and the magnet portion 7 of the magnet rotor portion 2 is relative to a gap portion Lg between the magnet portion 4 and the stator core portion 8s (8t) described later. In addition, if it is selected within the range of 1 to 10 times, the effectiveness for making the ultra-thin shape can be enjoyed while ensuring the necessary torque and assembly.

  Further, a pair of left and right stator portions 3s and 3t, specifically, magnetic pole portions 8sp and 8tp formed at one end of the stator core portions 8s and 8t described above are arranged on both sides of the radial direction Fd of the magnet rotor portion 2. To do. That is, the stator portions 3s and 3t are disposed 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. At this time, a certain gap Lg shown in FIG. 1 is provided between the magnet portion 4 and the stator core portion 8s (8t), more specifically, between the outer peripheral surface of the magnet portion 4 and the tip surfaces of the magnetic pole portions 8sp and 8tp. Set.

  Therefore, with this configuration, the stator portion 3s, the magnet rotor portion 2, and the stator portion 3t can be arranged along a straight line, so that the overall shape (outer shape) is a thin flat. The shape of the rotary solenoid 1 can be reasonably realized from the viewpoint of layout.

  On the other hand, a stopper mechanism is configured by fixing a locking member 24 to the shaft 6 and fixing a stopper member 25 integrally formed in a concave shape with a nonmagnetic material to the inner surface of the casing 4. As shown in FIG. 3, the locking body 24 is formed by integrally forming a circular portion 24r and a fan-shaped (arc-shaped) locking piece portion 24s protruding from the periphery of the circular portion 24r. Further, the stopper member 25 is formed of synthetic resin or the like as a whole, and is integrally provided with a pair of stoppers 17s and 17t that are formed so as to protrude over almost half of the circular portion 24r as shown in FIG. is there. 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 portion 4f, but this position can be changed. Therefore, the stop position can be easily changed by changing the stopper member 25.

  Accordingly, if one end side of the locking piece portion 24s is locked to the stopper 17s, the rotational displacement to one side is restricted, and if the other end side of the locking piece portion 24s is locked to the stopper 17t, the other side is controlled. The rotational displacement of is controlled. If such a stopper mechanism is provided, it is possible to easily construct a stopper mechanism that regulates the rotation range Zr only by adding the stopper member 25 and the locking body 24. 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. The illustrated stopper member 25 is also used as a guide member for the connecting wires of the coils 9s and 9t, the lead wires for drawing, and the like.

  With the above configuration, the shaft 6 has a diameter of 1 [mm] and the magnet portion 7 has an outer diameter of 3 [mm] as the dimensions of the rotary solenoid 1, and the side surface portion 4p of the casing 4 and the magnet of the magnet rotor portion 2 are magnetized. By setting the gap Lc between the portions 7 to 0.25 [mm] and setting the gap Lg between the magnet portion 4 and the stator core portion 8s (8t) to 0.2 [mm], the overall thickness can be reduced. An ultra-thin thickness of 3.9 [mm] could be realized. It was also confirmed that the output torque was equivalent when compared with a cylindrical general rotary solenoid having an outer diameter of about twice.

  Therefore, according to the rotary solenoid 1 according to the first embodiment as described above, as a basic configuration, the magnet rotor portion 2 having the magnet portion 7 having the S pole and the N pole in the radial direction Fd of the shaft 6, and the magnet portion A pair of stator core portions 8s, 8t, which are arranged on both sides in the radial direction Fd of FIG. 7, are opposed to the magnet portion 7 at the stator core portions 8s, 8t on which the coils 9s, 9t are mounted, and the other ends 8sj, 8tj are coupled to the casing 4. And a pair of opposite end face parts 4f, 4r in the casing 4 provided with the bearing parts 5f, 5r, the length Ls of the short side part 4rs ... is the length of the long side part 4rm ... In the casing 4 that is selected as a rectangular shape Sr that satisfies a condition that is 1/2 or less of the length Lm, and that extends in a right angle direction from at least one long side portion 4fm. Since the position of the side surface portion 4p is selected as the proximity position Xs that allows the rotation of the magnet rotor portion 2, the overall shape (outer shape) of the rotary solenoid 1 is made thin and thin, in particular, the thickness. An ultra-thin shape of 5 mm or less can be easily realized. As a result, it is possible to deal with various arrangement spaces, such as being able to arrange in a narrow space such as a gap between parts, and the versatility can be greatly improved.

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

  As shown in FIG. 5, the magnet portion 7 of the illustrated magnet rotor portion 2 has an N-pole on the right outer peripheral surface, an S-pole on the right inner peripheral surface, an S-pole on the left outer peripheral surface, and an inner peripheral surface on the left. It is assumed that the N pole is magnetized. Now, when the coils 9s and 9t shown in FIG. 5 are energized, the stator core portions 8t and 8s are excited, and the magnetic lines of force, as shown by dotted arrows in FIG. It occurs in the path of the casing upper half part 4s → the stator core part 8s → the gap part Lg → the magnet part 7 → the gap part Lg → the stator core part 8t. As a result, an S pole is generated at the magnetic pole portion 8tp of the stator core portion 8t, and an N pole is generated at the magnetic pole portion 8sp of the stator core portion 8s. As a result, the stator portions 3 s and 3 t are both attracted to the magnet portion 7 of the magnet rotor portion 2. Since the N pole and the S pole on the outer peripheral surface of the magnet unit 7 are in a positional relationship of 180 °, both the N pole and the S pole of the magnet unit 7 are rotationally displaced in the same rotational direction, for example, clockwise. Then, the locking piece 24s stops at a position where one end of the locking piece 24s contacts the stopper 17t. When stopped, the magnet rotor portion 2 (magnet portion 7) is attracted to the stator core portion 8t even if energization is cancelled, 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 coils 9s and 9t are energized in the reverse direction, the stator core portions 8s and 8t are excited in the reverse direction, and an S pole is generated in the magnetic pole portion 8sp of the stator core portion 8s. The N pole is generated in the magnetic pole part 8tp of the stator core part 8t. As a result, the stator portions 3s and 3t are both attracted in the opposite directions with respect to the magnet portion 7 of the magnet rotor portion 2, and the N pole and the S pole of the magnet portion 7 are both rotationally displaced counterclockwise. The other end of the locking piece 24s stops at a position where it comes into contact with the stopper 17s. When stopped, the magnet rotor portion 2 (magnet portion 7) is attracted to the stator core portion 8s even if energization is canceled, so that the stopped state is maintained by the self-holding function.

  9 and 10 show modified examples of the rotary solenoid 1 according to the first embodiment. Hereinafter, the configuration and operation of the rotary solenoid 1 according to the modified example will be described.

  The rotary solenoid 1 according to the modified example is different from the rotary solenoid 1 according to the first embodiment in that the form of the casing 4 is different. Except for these points, even if the detailed configuration and shape are different, other basic configurations are the same.

  The casing 4 in the rotary solenoid 1 according to the modified example is obtained by integrally forming the casing upper half part 4s with a synthetic resin that is a nonmagnetic material. In particular, each surface part in the casing upper half part 4s and the casing lower half part 4m is formed thick so that the casing lower half part 4m and the casing upper half part 4s can be coupled by two fixing screws 31s and 31t. I made it. Therefore, the outer cover 21 is not used in the modified example. In addition, the rotary solenoid 1 according to the modified example has been described as an example in which the stoppers 17s and 17t are not provided. However, the stoppers 17s and 17t may be separately provided outside, as in the rotary solenoid 1 illustrated in FIG. The space may be disposed between the magnet rotor portion 2 and the inner surface of the casing 4 by securing a space in the casing 4. In addition, in the structure of FIG.9 and FIG.10, while attaching | subjecting the same code | symbol to the same part as FIGS. 1-8, the structure is clarified and the detailed description is abbreviate | omitted.

  Therefore, the operation of the rotary solenoid 1 according to the modified example is as follows. As shown in FIG. 10, the magnet portion 7 of the illustrated magnet rotor portion 2 has an N-pole on the right outer peripheral surface, an S-pole on the right inner peripheral surface, an S-pole on the left outer peripheral surface, and an S-pole on the left outer peripheral surface. N pole is magnetized. If the coils 9s and 9t shown in FIG. 10 are energized, the stator core portions 8t and 8s are excited, and the magnetic lines of force, as shown by the dotted arrows in FIG. 10, are the stator core portion 8t → the lower casing half 4m → It occurs in the path of stator core portion 8s → gap portion Lg → magnet portion 7 → gap portion Lg → stator core portion 8t. As a result, an S pole is generated at the magnetic pole portion 8tp of the stator core portion 8t, and an N pole is generated at the magnetic pole portion 8sp of the stator core portion 8s. As a result, the stator portions 3 s and 3 t are both attracted to the magnet portion 7 of the magnet rotor portion 2. Since the N pole and the S pole on the outer peripheral surface of the magnet unit 7 are in a positional relationship of 180 °, both the N pole and the S pole of the magnet unit 7 are rotationally displaced in the same rotational direction, for example, clockwise. Then, it stops at one stopper position (not shown).

  On the other hand, in this state, when energization switching is performed and the coils 9s and 9t are energized in the reverse direction, the stator core portions 8s and 8t are excited in the reverse direction, and an S pole is generated in the magnetic pole portion 8sp of the stator core portion 8s. The N pole is generated in the magnetic pole part 8tp of the stator core part 8t. As a result, the stator portions 3s and 3t are both attracted in the opposite directions with respect to the magnet portion 7 of the magnet rotor portion 2, and the N pole and the S pole of the magnet portion 7 are both rotationally displaced counterclockwise. Then, it stops at the other stopper position (not shown).

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

  The rotary solenoid 1 according to the second embodiment includes a casing 4 having a flat rectangular parallelepiped shape. The casing 4 is formed in a U-shaped casing lower half part 4m and the casing lower half part 4m from above. It consists of a U-shaped casing upper half part 4s assembled in a cross shape. Thereby, the intermediate part of the casing upper half part 4 s becomes one end face part 4 f in the casing 4, and the intermediate part of the casing lower half part 4 m becomes the other end face part 4 r in the casing 4. Thereby, a pair of opposite end surface parts 4f and 4r are comprised. Further, as shown in FIG. 14, 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 casing upper half part 4s is the end face part 4f.

  Further, the casing upper half part 4s is integrally formed of a metal material that is a non-magnetic material such as a stainless steel material or an aluminum material. Since the casing upper half part 4s is formed in a U shape as described above, the casing upper half part 4s includes a pair of side face parts 4p and 4q located on the long side part 4rm ... side in addition to the end face part 4f. Therefore, the side surface parts 4p and 4q close to the magnet rotor part 2 described later are nonmagnetic surfaces.

  On the other hand, the casing lower half part 4m also serves as a yoke for the stator parts 3s and 3t, and therefore, an electromagnetic steel plate made of soft magnetic material such as SPCC, SECC, silicon steel plate or the like is integrally formed by pressing. In addition, the casing lower half 4m may be a soft magnetic material molded by forging or the like.

  At the center position of the casing upper half part 4s (end face part 4f), one bearing part 5f using a lubricating resin bearing, a sintered oil-impregnated bearing, a ball bearing or the like is disposed, and the casing lower half body The other bearing portion 5r using the same bearing portion is also arranged at the center position of the bottom surface portion (end surface portion 4r) of the portion 4m. In addition, since it is a rotary solenoid having reciprocating rotation, a circular hole bearing portion molded integrally with the casing 4 can also be used. In addition, in the figure, 41s and 41t are integrally formed on both sides in the longitudinal direction of the casing upper half part 4s, and extend (protrude) outward from the casing lower half part 4m to provide circular holes. is there.

  On the other hand, 2 is a magnet rotor part, and is provided with a round bar-shaped shaft 6 formed of a soft magnetic material. As shown in FIG. 12, 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.

  In addition, the magnet portion 7 is fixed at an intermediate position in the axial direction Fs on the outer peripheral surface 6 f of the shaft 6 located inside the casing 4. As shown in FIG. 11, the magnet portion 7 is formed of a circular magnet Ms that covers a part of the circumference of the outer circumferential surface 6 f of the shaft 6 in the circumferential direction by a permanent magnet such as a ferrite magnet or a rare earth magnet. S and N poles are magnetized in the radial direction Fd. By magnetizing in this way, the magnetic characteristics of the magnet part 7 can be utilized to the maximum, and a higher magnetic flux density can be obtained in the gap Lg described later. If an Nd—Fe—B magnet is used, a high magnetic flux density in the gap Lg can be ensured and torque can be increased.

  As shown in FIG. 15, the illustrated magnet portion 7 is formed by an arcuate body Ms that covers a range of 120 ° on the outer peripheral surface 6 f of the shaft 6 when the shaft 6 is the center, and as shown in FIG. 16. Further, the outer peripheral surface side was magnetized to N pole and the inner peripheral surface side was magnetized to S pole. 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. Therefore, the circular arc body Ms also serves as a locking portion that constitutes a stopper mechanism that abuts against the stoppers 17s and 17t and regulates the rotation range Zr. Moreover, if the magnet part 7 is comprised by such circular arc body Ms, since it can be functioned also as an eccentric weight, it can utilize effectively as vibrators, such as a portable apparatus in which super thinning is progressing. In particular, unlike the coreless motor type that is generally used, the vibration frequency can be easily changed.

  Thus, the magnet part 7 may be formed by the cylindrical body Mr covering the entire circumference in the circumferential direction on the outer circumferential surface 6f of the shaft 6 as in the first embodiment, or as in the second embodiment. Since the degree of freedom in design can be increased from the viewpoint of the shape of the magnet part 7, such as a circular arc body Ms that covers a part of the circumference of the outer peripheral surface 6 f of the shaft 6, it corresponds to the specifications. The intended rotary solenoid 1 can be easily obtained.

  By the way, the shape of the magnet rotor part 2, particularly the dimension in the radial direction Fd, is closely 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 above-described rectangular shape Sr. At this time, the position of the side surface portion 4p in the casing 4 extending in a perpendicular direction from at least one long side portion 4fm. Is selected as a proximity position Xs that allows rotation of the magnet rotor portion 2. Therefore, as shown in FIG. 15, the clearance Lc between the outer peripheral surface of the magnet portion 7 of the magnet rotor portion 2 and the side surface portion 4p of the casing 4 is a slight clearance considering the conditions that allow the rotation of the magnet rotor portion 2 to be allowed. It is enough to secure.

  Specifically, as the proximity position Xs, a gap Lc between the side surface portion 4p of the casing 4 and the magnet portion 7 of the magnet rotor portion 2 is relative to a gap portion Lg between the magnet portion 4 and the stator core portion 8s (8t) described later. In addition, if it is selected within the range of 1 to 10 times, the effectiveness for making the ultra-thin shape can be enjoyed while ensuring the necessary torque and assembly.

  Further, in the casing 4, a stopper that restricts the rotation range Zr by locking the inner surface 4 q i of the other side surface portion 4 q facing the side surface portion 4 p with the circumferential end of the magnet portion 7 formed by the circular arc body Ms. 17s and 17t are provided integrally. In this case, as shown in FIG. 11, by fixing the stopper member 25 integrally formed in a concave shape with a nonmagnetic material such as a synthetic resin material to the inner surface 4qi of the side surface portion 4q, the side surface portions are formed on both sides of the stopper member 25. Stoppers 17s and 17t projecting in a right angle direction from the inner surface 4qi of 4q can be disposed, and the shaft portion 6 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 25.

  Thereby, if one end side of the magnet part 7 is locked to the stopper 17s, the rotational displacement to one side is restricted, and if the other end side of the magnet part 7 is locked to the stopper 17t, the rotational displacement to the other side is restricted. Is regulated. If such stoppers 17s and 17t are provided, the shape of the magnet rotor part 2 can be used as a direct contact part. Therefore, a stopper mechanism that restricts the rotation range Zr can be easily achieved simply 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 disposed on both sides of the magnet rotor portion 2 in the radial direction Fd. 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.

  Each stator part 3s, 3t includes coils 9s, 9t attached to the stator core parts 8s, 8t fixed to the casing 4. 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 core portions 8s and 8t are integrally formed of a soft magnetic material such as SPCC, SECC, silicon steel plate, and the other end side is formed by the casing lower half portion 4m while the other end side is opposed to the magnet rotor portion 2. The side surface portion is fixed to 4 ms and 4 mt.

  Thus, when the casing 4 is configured, a part of the casing 4 including at least a portion where the stator core portions 8s and 8t are coupled and a portion where the bearing portion 5r is provided, that is, the lower half portion 4m of the casing is formed of a magnetic material. In addition, if the shaft 6 is formed of a magnetic material, a simple magnetic circuit using the casing 4 and the shaft 6 can be easily configured, and the reduction in the number of parts can contribute to further miniaturization and cost reduction.

  As shown in FIG. 11, the stator core portions 8s and 8t have half portions positioned on the side surface portions 4ms and 4mt as core portions 8sc and 8tc formed with a narrow width, and are loaded at the center positions of the coils 9s and 9t. The half portions located on the magnet rotor portion 2 side are formed as magnetic pole portions 8sp and 8tp. In particular, as shown in FIG. 11, the tip surfaces of the magnetic pole portions 8sp and 8tp are formed as concave arc edges, are opposed to the magnet yoke portion 2, and are half portions in the short side direction of the end surface portion 4p, It is formed near the side surface portion 4p. Thereby, when the magnet rotor part 2 is rotationally displaced and the outer peripheral surface of the magnet part 7 is opposed to the magnetic pole parts 8sp and 8tp, the outer peripheral surface of the magnet part 7 is interposed between the magnetic pole parts 8sp and 8tp via the gap Lg. Proximity to.

  Further, it is desirable that the circumferential lengths of the magnetic pole portions 8sp and 8tp are shorter than the circumferential length of the magnet portion 7 according to a predetermined angle range Za. Thereby, sufficient holding torque at the time of deenergization is securable. Furthermore, it is desirable that the shortest distance between the left and right stator core portions 8s and 8t be smaller than the circumferential length of the magnet portion 7 according to the angular range Za. 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. On the other hand, 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.

  Therefore, even in the rotary solenoid 1 according to the second embodiment as described above, as a basic configuration, the magnet rotor unit 2 including the magnet unit 7 having the S pole and the N pole in the radial direction Fd of the shaft 6, and the magnet Arranged on both sides in the radial direction Fd of the portion 7, one end 8 sp and 8 tp of the stator core portion 8 s and 8 t to which the coils 9 s and 9 t are attached are opposed to the magnet portion 7, and the other end 8 sj and 8 tj are coupled to the casing 4. A pair of stator portions 3s, 3t, and a pair of opposite end surface portions 4f, 4r in the casing 4 provided with the bearing portions 5f, 5r, the length Ls of the short side portion 4rs ... is the length of the long side portion 4rm ... In the casing 4 that is selected as a rectangular shape Sr that satisfies a condition that is ½ or less of the length Lm and that extends in a right angle direction from at least one long side portion 4fm. Since the position of the side surface portion 4p is selected as the proximity position Xs that allows the rotation of the magnet rotor portion 2, the overall shape (outer shape) of the rotary solenoid 1 is made thin, particularly thin. An ultra-thin shape having a thickness of 5 mm or less can be easily realized. As a result, it is possible to deal with various arrangement spaces, such as being able to arrange in a narrow space such as a gap between parts, and the versatility can be greatly improved.

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

  As shown in FIG. 16, the magnet portion 7 of the illustrated magnet rotor portion 2 is magnetized with an N pole on the outer peripheral surface side and an S pole on the inner peripheral surface side. Now, if the coils 9s and 9t shown in FIG. 16 are energized, the stator core portions 8s and 8t are excited, the S pole is generated in the magnetic pole portion 8tp of the stator core portion 8t, and the N pole is generated in the magnetic pole portion 8sp of the stator core portion 8s. Will occur. Magnetic field lines at this time are indicated by dotted arrows in FIG. That is, the lines of magnetic force are generated from the stator core portion 8t → the lower casing half 4m → the shaft 6 → the S pole of the magnet portion 7 → the N pole of the magnet portion 7 → the gap portion Lg → the stator core portion 8t. Accordingly, 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 magnet portion 7 of the magnet rotor portion 2, and therefore the magnet rotor portion 2 is clockwise in FIG. It is pivotally displaced. And it stops at the position of the magnet part 7x shown by the phantom line in FIG. 15, that is, the position where the right end of the magnet part 7 is in contact with the stopper 17t. When the operation is stopped, the magnet rotor portion 2 (magnet portion 7) is attracted to the stator core portion 8t and the stopped state is maintained by the self-holding function even if the energization is released.

  On the other hand, when energization switching is performed in this state and the coils 9s and 9t are energized in the reverse direction, the stator core portions 8s and 8t are excited, and an S pole is generated in the magnetic pole portion 8sp of the stator core portion 8s. An N pole is generated in the magnetic part 8tp of 8t. As a result, the left stator portion 3s is attracted and the right stator portion 3t is repelled with respect to the magnet portion 7 of the magnet rotor portion 2, so that the magnet rotor portion 2 is counterclockwise in FIG. Rotating displacement in the direction. And it stops at the position of the magnet part 7y shown by the solid line in FIG. 15, that is, the position where the left end of the magnet part 7 is in contact with the stopper 17s. When stopped, the magnet rotor portion 2 (magnet portion 7) is attracted to the stator core portion 8s even if energization is canceled, and the stopped state is maintained by the self-holding function. In the case of the example, since the angle range Za of the magnet unit 7 is selected to be 120 [°], the rotation range Zr is approximately 60 [°].

  The best embodiments (the first embodiment and the second embodiment including modifications) have been described in detail above, but the present invention is not limited to such embodiments, and the detailed configuration, shape, The material, quantity, numerical value, and the like can be arbitrarily changed, added, or deleted without departing from the gist of the present invention.

  For example, as the proximity position Xs, the gap Lc between the side surface portion 4p in the casing 4 and the magnet portion 7 in the magnet rotor portion 2 is 1 to 1 with respect to the gap portion Lg between the magnet portion 4 and the stator core portion 8s (8t). A range of 10 times can be used as a guide, but it is not an absolute condition. The shaft 6 is preferably formed of a magnetic material, but the entire material does not need to be a magnetic material, only a necessary part is a magnetic material, and the other part is a non-magnetic material. This does not exclude the case where nonmagnetic materials are combined. 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 (10)

  A magnet rotor part having a magnet part at the middle position of a shaft rotatably supported by a bearing part provided in the casing, and a stator core part 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, and a magnet rotor part having a magnet part provided with an S pole and an N pole in the radial direction of the shaft, and both radial sides of the magnet part In the casing provided with a pair of stator parts, one end of the stator core part to which the coil is mounted, the one end being opposed to the magnet part and the other end being coupled to the casing also serving as a yoke, and the bearing part is provided. A pair of opposing end face portions satisfy the condition that the length of the short side portion is ½ or less of the length of the long side portion. The rectangular shape is selected, and the position of the side surface portion of the casing that extends in a right angle direction from at least one of the long side portions is selected as a proximity position that allows rotation of the magnet rotor portion. A featured rotary solenoid.   The proximity position is selected such that the gap between the side surface portion of the casing and the magnet portion of the magnet rotor portion is in a range of 1 to 10 times the gap between the magnet portion and the stator core portion. The rotary solenoid according to claim 1.   2. The rotary solenoid according to claim 1, wherein the pair of stator portions are disposed on both sides in the radial direction of the magnet rotor portion and on both sides in the longitudinal direction of the end surface portion.   4. The casing according to claim 1, 2, or 3, wherein a part or all of the casing including at least a portion where the stator core portion is coupled and a portion where the bearing portion is provided is formed of a magnetic material. Rotary solenoid.   2. The casing according to claim 1, wherein a pair of stoppers that are engaged with the magnet rotor portion 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 shaft is made of a magnetic material.   The rotary solenoid according to claim 1, wherein the magnet portion is formed of a cylindrical body that covers the entire circumference in the circumferential direction on the outer peripheral surface of the shaft.   The rotary solenoid according to claim 1, wherein the magnet portion is formed by an arc body that covers a part of the circumference of the outer circumferential surface of the shaft in the circumferential direction.   9. The rotary solenoid according to claim 1, wherein the magnet part is selected to have an axial dimension longer than an axial dimension of the stator core part.   The said magnet part selects the dimension of the circumferential direction per pole in an outer peripheral surface longer than the dimension of the said circumferential direction in the said stator core part facing the said magnet part, The Claim 1, 7 or 8 characterized by the above-mentioned. The described rotary solenoid.

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