JPWO2017038283A1 - Rotary solenoid - Google Patents

Abstract

The coil 6 held by the holding block unit 5, the rotating shaft 4 fixed to the holding block unit 5 and arranged in parallel with the axial center line Ls of the coil 6, and the holding block unit 5 at a predetermined position A movable body portion Sm provided with an attracted child 7 formed of a fixed magnetic material, a casing 2 formed of the magnetic material, and fixed to the inner surfaces 2p and 2q of the casing 2, and the axis of the coil 6 A fixed body Sc that is arranged to face the end portion in the direction Fs and includes two sets of magnet portions 8a and 8b arranged corresponding to both end positions Xa and Xb of the turning range Zm of the movable body portion Sm. Prepare.

Description

  The present invention relates to a rotary solenoid including a fixed body portion having a casing provided with a bearing portion and a movable body portion having a rotation shaft that is rotatably supported by the bearing portion.

  Conventionally, a rotary solenoid including a fixed body portion having a casing in which a pair of bearing portions are arranged on the front and rear sides and a movable body portion having a rotating shaft rotatably supported by the pair of bearing portions, particularly including a magnet or the like. As a rotary solenoid of a type in which a movable part turns around a pivot shaft, a rotary solenoid disclosed in Patent Document 1 already proposed by the present applicant is known.

  The rotary solenoid disclosed in Patent Document 1 aims to reduce the cost based on the reduction in the number of parts and the number of assembly steps, and to reduce the overall size and compactness. A shaft supported rotatably by a bearing portion provided on the shaft, a movable body portion having a magnet portion that can be turned by fixing one end side to the shaft and making the other end side a free end, and fixed to the casing And a field part capable of attracting or repelling the movable body part by power feeding control, and in particular, a shaft is arranged at a position corresponding to one corner part in the triangle and corresponding to the remaining corner part. Field having a movable body portion having a magnet portion where an S pole and an N pole are provided at positions, and a single coil arranged with one end face in the coil axis direction facing the magnet portion When, it is constructed by a movable body regulating portion for regulating the range in which the movable body is pivoted to a predetermined range.

JP 2014-22703 A

  However, in addition to the rotary solenoid disclosed in Patent Document 1 described above, the conventional rotary solenoid that is a type in which a movable part including a magnet or the like turns particularly has the following problems to be solved.

  First, since the magnet is supported by the rotating shaft, the entire weight of the movable body portion is increased, and the output torque and the response are likely to decrease. In particular, since this type of rotary solenoid has a narrow shaft rotation range, a decrease in output torque and a decrease in responsiveness are negative factors in realizing high-speed operation, which directly reduces productivity in the equipment used. Affect.

  Second, since the output torque and responsiveness are affected by the size of the magnet, in order to ensure the predetermined output torque and responsiveness, it is necessary to make the size of the magnet a corresponding size. There is a limit to the realization of the system, which tends to increase the overall size of the rotary solenoid.

  Third, since the weight of the movable body portion increases, the moment of inertia increases. As a result, when the movable body restricting portion that restricts the turning range of the movable body portion is provided inside the casing, the impact sound generated during restriction tends to increase. Therefore, there is room for further improvement from the viewpoint of improving the quietness.

  Fourthly, in the conventional rotary solenoid, that is, the type in which the movable part including the magnet or the like turns, it is necessary to dispose a high permeability core that generates a magnetic pole in the inner space of the coil arranged on the fixed side. The inductance of the coil becomes very large. As a result, even when the drive voltage is applied, the rise of the current is delayed, and this is also a factor that greatly reduces the responsiveness.

  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 problem, the rotary solenoid 1 according to the present invention is rotated by a fixed body portion Sc having a casing 2 provided with a pair of bearing portions 3f and 3r positioned at the front and rear and a pair of bearing portions 3f and 3r. A rotary solenoid provided with a movable body portion Sm having a rotating shaft 4 that is freely supported, a coil 6 held by the holding block portion 5, a shaft center line of the coil 6 fixed to the holding block portion 5 A movable body Sm provided with a rotating shaft 4 arranged in parallel with Ls and an attracted child 7 formed of a magnetic material fixed at a predetermined position of the holding block 5 is provided. The formed casing 2 is fixed to the inner surfaces 2p and 2q of the casing 2 and is disposed to face the end portion of the axial direction Fs of the coil 6, and the turning range Zm of the movable body portion Sm. Characterized in that it comprises end positions Xa, two sets of magnet unit 8a arranged to correspond to Xb, the fixed body portion Sc formed by providing an 8b.

  Further, according to a preferred aspect of the present invention, the movable body portion Sm is provided with a single coil 6, connected to the winding ends 6s and 6t of the coil 6, and the length of the movable body portion Sm within the turning range Zm. It is possible to provide a pair of lead wires 11s and 11t arranged in the casing 2 by selecting a length that allows the displacement of the movable body portion Sm. On the other hand, the holding block portion 5 may be provided with holding slit portions 12 s and 12 t for holding the lead wires 11 s and 11 t at a portion Xn opposite to the coil 6 when viewed from the rotating shaft 4. Alternatively, a printed wiring board 5p having circuit wiring portions 5ps, 5pt that is fixed to one surface of the holding block portion 5 and connects the winding ends 6s, 6t of the coil 6 and the pair of lead wires 11s, 11t is provided. It may be provided. Furthermore, the holding block portion 5 can be provided with restriction stopper portions 13a and 13b that abut against the inner surface of the casing 2 and perform position restriction corresponding to both end positions Xa and Xb of the turning range Zm.

  Furthermore, according to a preferred aspect of the present invention, the magnet portions 8a and 8b are formed by a single magnet 8ap and 8bp disposed on the inner surface 2p on one side of the casing 2 facing one end portion of the axial direction Fs of the coil 6. Can be configured. At this time, the other inner surface 2q facing the inner surface 2p on one side of the casing 2 can be provided with magnetic flux collecting portions 14a and 14b protruding from the inner surface 2q on the other side and facing the magnets 8ap and 8bp, respectively. . The magnet parts 8a and 8b are constituted by a pair of magnets 8ap, 8aq and 8bp, 8bq disposed on the inner surfaces 2p and 2q on opposite sides of the casing 2 facing the both ends of the axial direction Fs of the coil 6, respectively. can do. The magnets 8ap, 8bp, 8aq, 8bq are attracted and fixed to the inner surfaces 2p, 2q of the casing 2, and are positioned by one or more positioning projections 15 ... integrally formed with the inner surfaces 2p, 2q of the casing 2. Can do. Further, the attracted child 7 can be disposed in the inner space of the coil 6 and closer to the rotating shaft 4 than the central position of the coil 6, and a pair of magnets 8ap, 8aq, and 8bp, The distance to one magnet 8ap, 8bp in 8bq can be different from the distance to the other magnet. The sucked child 7 has a cross-sectional area perpendicular to the axis selected in a range of 0.1 to 10% with respect to a cross-sectional area perpendicular to the axis in the inner space of the coil 6, and both ends of the turning range Zm. In the positions Xa and Xb, it is desirable to select the fixed position so that the center position 7c is located within a predetermined range Zs in the turning direction Fr with respect to the positions of the edge portions Ea, Eb... Of the magnets 8ap, 8bp.

  On the other hand, according to a preferred aspect of the present invention, the lead for guiding at least the lead wires 11s and 11t by positioning and arranging the fixed body portion Sc inside the casing 2 and integrally forming the fixed body portion Sc. An internal frame portion 17 having a line cover 17c can be provided. At this time, the inner frame 17 has a pair of left and right block restricting portions 18a and 18b that abut against the restricting stopper portions 13a and 13b in the holding block portion 5 and perform position restriction corresponding to both end positions Xa and Xb of the turning range Zm. Can be provided integrally, and one bearing portion 3r of the pair of bearing portions 3f, 3r can be provided integrally.

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

  (1) In order to support the relatively light coil 6 on the rotating shaft 4 on the movable side by fixing the heavy magnets 8ap, 8bp, 8aq, 8bq to the inner surfaces 2p, 2q of the casing 2 on the fixed side. The overall weight of the movable body Sm can be drastically reduced, and high responsiveness and output torque can be ensured. In addition, since there is no other than the attracted child 7 having a small cross-sectional area in the inner space of the coil 6, the inductance of the coil 6 proportional to the magnetic permeability in the inner space of the coil 6 is a slight magnitude of several mH, When a drive voltage is applied, extremely high responsiveness can be realized such that the current can be raised to a saturation current almost instantaneously. As a result, it is possible to greatly contribute to improvement in high-speed operation and productivity in the equipment used.

  (2) The magnets 8ap, 8bp, 8aq, 8bq are arranged on the inner surface of the casing 2 facing the axial Fs end of the coil 6 supported by the rotating shaft 4, and the space for disposing the inner surfaces 2p, 2q of the casing 2 Can permit the size of the magnets 8ap, 8bp, 8aq, and 8bq to be increased. As a result, the entire rotary solenoid 1 can be reduced in size while ensuring the required performance.

  (3) According to a preferred embodiment, the movable body Sm is provided with a single coil 6 and connected to the winding ends 6s and 6t of the coil 6 and the length of the movable body Sm in the turning range Zm. If a pair of lead wires 11s and 11t, which are selected to allow displacement and are arranged inside the casing 2, are provided, even if the movable body portion Sm is displaced over the swivel range Zm, the displacement is derived. It can be easily absorbed by 11s and 11t. Thereby, the reliability of the electric system including the lead wires 11s and 11t can be increased.

  (4) According to a preferred embodiment, the holding block portion 5 may be provided with holding slit portions 12s and 12t for holding the lead wires 11s and 11t at the portion Xn opposite to the position of the coil 6 by 180 [°]. For example, the intermediate positions of the lead wires 11s and 11t connected to the winding ends 6s and 6t of the coil 6 can be held by the holding slit portions 12s and 12t. The stress applied to the connecting portions of 11s and 11t can be prevented, and disconnection at the connecting portions can be avoided.

  (5) According to a preferred embodiment, a circuit wiring portion that is fixed to the holding block portion 5 on one side of the holding block portion 5 and connects the winding ends 6s and 6t of the coil 6 and the pair of lead wires 11s and 11t. If the printed wiring board 5p having 5 ps and 5 pt is provided, both the winding ends 6s and 6t of the coil 6 and the pair of lead wires 11s and 11t can be fixed on the printed wiring board 5p. The connection between 6t and the pair of lead wires 11s and 11t can be easily and reliably performed. In addition, the lead positions of the pair of lead wires 11 s and 11 t are set by the circuit wiring portions 5 ps and 5 pt, and the lead wires 11 s leading around the inside of the casing 2 by separating the pair of lead positions as much as possible. Since the radius of curvature at the curved portion of 11t can be increased, the durability of the lead wires 11s and 11t and the connection portion with respect to repetitive rotational displacement of the movable body portion Sm can be further increased. Furthermore, the fixed fixing of the connection part can improve the fixing strength and durability against vibrations and the like, and even when the holding block portion 5 and the printed wiring board 5p are integrally formed by insert molding or the like, stability during molding is ensured. Good molding can be performed by securing the property.

  (6) According to a preferred embodiment, if the holding block portion 5 is provided with restriction stopper portions 13a and 13b that abut against the inner surface of the casing 2 and perform position restriction corresponding to both end positions Xa and Xb of the turning range Zm, the movable block portion 5 is movable. Since the moment of inertia can be reduced by reducing the weight of the body part Sm, even when the restriction stopper parts 13a and 13b are provided inside the casing 2, the impact sound at the time of collision can be reduced, and the silence is further improved. Can be increased.

  (7) Necessary if the magnet portions 8a and 8b are constituted by a single magnet 8ap and 8bp disposed on the inner surface 2p on one side of the casing 2 facing the one end portion in the axial direction Fs of the coil 6 according to a preferred embodiment. Since the minimum number of parts is sufficient, the embodiment can be implemented as the most advantageous form from the viewpoint of reducing the size and cost of the rotary solenoid 1.

  (8) According to a preferred embodiment, the magnetic flux collecting portions 14a and 14b projecting from the inner surface 2q on the other side facing the inner surface 2p on one side of the casing 2 and projecting from the inner surface 2q on the other side and facing the magnets 8ap and 8bp, respectively. If provided, the density of the magnetic flux passing through the coil 6 can be further increased by the converging action of the magnetic lines of force by the magnetic flux collecting portions 14a and 14b, which can contribute to further improvement in responsiveness and output torque.

  (9) According to a preferred embodiment, a pair of magnets 8ap, 8aq, 8a, 8b, which are disposed on inner surfaces 2p and 2q on opposite sides of the casing 2, facing the opposite ends of the coil 6 in the axial direction Fs, respectively. And 8 bp and 8 bq, the number of magnets is doubled compared to the case where the magnets 8 ap and 2 bp are arranged only on the inner surface 2 p on one side of the casing 2, but the response, output torque and magnetic balance of the rotary solenoid 1 are doubled. From the viewpoint of ensuring stability, it can be implemented as the most advantageous mode.

  (10) According to a preferred embodiment, the magnets 8ap, 8bp, 8aq, 8bq are attracted and fixed to the inner surfaces 2p, 2q of the casing 2, and one or more positioning projections are formed integrally with the inner surfaces 2p, 2q of the casing 2. If positioning is performed by 15..., It is not necessary to add a part for attaching the magnets 8 ap..., So that it is possible to easily and cost-effectively perform positioning of the magnets 8 ap. In addition, since the magnets 8ap and the inner surface 2p of the casing 2 are in direct surface contact, a good magnetic circuit (magnetic path) can be configured.

  (11) According to a preferred aspect, if the sucked child 7 is arranged in the inner space of the coil 6 and closer to the rotating shaft 4 than the central position of the coil 6, the sucked child that changes linearly 7, the change angle of the suction force can be further increased, and the suction force can be maximized at both end positions Xa and Xb, so that a stable self-holding action can be secured.

  (12) According to a preferred embodiment, when the attracted child 7 is arranged, the distance to the one magnet 8ap, 8bp in the pair of magnets 8ap, 8aq, and 8bp, 8bq may be different from the distance to the other magnet. Since an appropriate force can be applied to the axial direction Fs of the rotating shaft 4, it is possible to prevent the movable body portion Sm from rattling and to suppress generation of unnecessary vibration and noise.

  (13) According to a preferred embodiment, if the cross-sectional area perpendicular to the axis of the attracted child 7 is selected in the range of 0.1 to 10% with respect to the cross-sectional area perpendicular to the axis in the inner space of the coil 6, Secure the necessary suction force (holding torque) to obtain the self-holding force at the time of stopping and ensure the stable self-holding action from the viewpoint of eliminating unnecessary suction force, and easily optimize it Can do.

  (14) According to a preferred embodiment, when selecting the fixed position of the attracted child 7, the center position 7c is at the positions of the edge portions Ea, Eb ... of the magnets 8ap, 8bp ... at the both ends Xa, Xb of the turning range Zm. On the other hand, if it is selected so as to be located within the predetermined range Zs in the turning direction Fr, the self-holding force can be applied even when no power is supplied, so that the movable body portion Sm is stopped at both end positions Xa and Xb. In addition, the size of the attracted child 7 can be reduced, and even when the influence on energization (at the start of movement) is reduced, it can be stopped reliably.

  (15) An interior having a lead wire cover 17c that guides at least the lead wires 11s and 11t by being positioned and disposed inside the casing 2 and integrally formed on the fixed body portion Sc according to a preferred embodiment. If the frame portion 17 is provided, the routing positions of the lead wires 11s and 11t arranged inside the casing 2 can be regulated, so that the lead can be stably guided and interference with the coil 6 due to vibrations and troubles can be avoided. , Can improve the reliability of operation.

  (16) According to a preferred embodiment, a pair of left and right block restriction that performs position restriction corresponding to both end positions Xa and Xb of the turning range Zm by contacting the inner frame part 17 with the restriction stopper parts 13a and 13b in the holding block part 5 If the portions 18a and 18b are provided integrally, the displacement of the holding block portion 5 is restricted by the collision with the inner frame portion 17, so that the shock absorption at the time of the collision is selected by selecting the shape and material of the inner frame portion 17. Bound reduction and noise reduction can be achieved.

  (17) According to a preferred embodiment, if one bearing portion 3r of the pair of bearing portions 3f and 3r is integrally provided in the inner frame portion 17, the separate bearing portion 3r is not necessary, thereby reducing the number of parts. This can contribute to cost reduction and improvement in manufacturability, and can accurately position the bearing portion 3r with respect to other functional parts (for example, the block restricting portions 18a and 18b).

A sectional front view of a rotary solenoid according to a preferred embodiment of the present invention, Sectional side view of the rotary solenoid, Sectional front view showing a wiring system of the rotary solenoid, A cross-sectional side view showing an extracted magnet mounting structure for the rotary solenoid, External front view of the rotary solenoid, The principle block diagram for explaining the relationship between the magnet of the rotary solenoid and the attracted child, A schematic cross-sectional side view for explaining the magnetic circuit of the rotary solenoid, A schematic sectional plan view for explaining a magnetic circuit of the rotary solenoid, Action explanatory diagram of the rotary solenoid, Response waveform diagram of current magnitude with respect to time from energization start of the rotary solenoid, Change characteristic diagram of output torque with respect to rotation angle of movable body of same rotary solenoid, Sectional front view showing a wiring system of a rotary solenoid according to a modified embodiment of the present invention, Sectional front view of a rotary solenoid according to another modified embodiment of the present invention, Sectional plan view of a rotary solenoid according to another modified embodiment of the present invention, FIG. 14 is a cross-sectional plan view of a rotary solenoid according to the modified example of FIG. The cross-sectional front view in the C16-C16 line in FIG. 17 of the rotary solenoid which concerns on other modified embodiment of this invention, Sectional side view of the rotary solenoid, Front view of a printed circuit board that constitutes a holding block portion provided for the rotary solenoid, A cross-sectional front view showing a state in which the inner frame portion is assembled to the housing portion provided in the rotary solenoid, External perspective view of the internal frame part provided in the rotary solenoid,

  1: rotary solenoid, 2: casing, 2p: inner surface of casing, 2q: inner surface of casing, 3f: bearing portion, 3r: bearing portion, 4: rotating shaft, 5: holding block portion, 5p: printed wiring board, 5ps : Circuit wiring part, 5pt: circuit wiring part, 6: coil, 6s: winding end, 6t: winding end, 7: attracted element, 7c: center position, 8a: magnet part, 8b: magnet part, 8ap: Magnet, 8 bp: Magnet, 8 aq: Magnet, 8 bq: Magnet, 11 s: Derived lead wire, 11 t: Derived lead wire, 12 s: Holding slit portion, 12 t: Holding slit portion, 13 a: Restricting stopper portion, 13 b: Restricting stopper portion, 14a: magnetic flux collecting part, 14b: magnetic flux collecting part, 15 ...: positioning convex part, 17: inner frame part, 17c: lead wire cover, 18a: 18b: block restricting portion, Xn: 180 ° opposite to the coil position, Xa: end position of the turning range (one end position), Xb: end position of the turning range (the other end) Position), Sc: fixed body part, Sm: movable body part, Ls: axial center line, Fs: axial direction of coil, Fr: turning direction, Zm: turning range, Ea: edge part of magnet, Eb: edge of magnet Part

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

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

  The rotary solenoid 1 is roughly divided into a fixed body Sc having a casing 2 provided with a pair of bearing portions 3f and 3r positioned at the front and rear, and a rotation supported rotatably by the pair of bearing portions 3f and 3r. And a movable body Sm having a shaft 4.

  In this case, as shown in FIGS. 1 and 2, the movable body portion Sm includes a holding block portion 5 integrally formed of a synthetic resin material that is an insulating material, and the holding block portion 5 has a cylindrical shape arranged on the upper portion. The block upper portion 5u and a flat plate-shaped block lower portion 5d extending downward from the central position in the axial direction Fs of the block upper portion 5u.

  And while fixing the state which penetrated the intermediate position of the rotation shaft 4 to the block upper part 5u, the to-be-sucked child 7 formed with the single coil 6 and the magnetic material is distribute | arranged to the block lower part 5d. Therefore, the assembly of the rotating shaft 4, the coil 6 and the sucked child 7 to the holding block portion 5 can be integrally formed by an insert molding method when the holding block portion 5 is formed of a synthetic resin material. As a result, the coil 6 is held by the holding block portion 5 and the attracted child 7 is fixed at a predetermined position of the holding block portion 5, and the rotating shaft 4 is fixed by the holding block portion 5, and A movable body Sm having a structure arranged in parallel with the axial center line Ls of the coil 6 is configured.

  On the other hand, as shown in FIGS. 1 and 2, the fixed body portion Sc includes a casing 2 formed of a magnetic material (preferably a soft magnetic material). The casing 2 includes a housing portion 2m whose front surface is an open surface. The lid portion 2c covers the open surface of the housing portion 2m. As a result, the inner surface of the lid portion 2 c becomes the inner surface 2 q of the casing 2, and the inner surface of the housing portion 2 m facing (facing) the inner surface 2 q becomes the inner surface 2 p of the casing 2.

  The casing 2m and the lid 2c constitute a magnetic circuit (magnetic path) through which magnetic lines of force from two sets of magnets 8a and 8b, which will be described later, pass, so that the design, cost, and weight are allowed as much as possible. It is desirable to increase the wall thickness. In the case of illustration, the thickness was selected to be 1.5 [mm], which is about 1.5 times that of a normal casing. In addition, the height dimension of the casing 2 shown in FIG. 1 is 35 [mm]. Since the rotary solenoid 1 according to the present embodiment can be reduced in size in terms of structure and performance, the thickness of the casing 2 can be increased accordingly. As a result, the magnetic path cross-sectional area can be increased, the magnetic loss related to the magnetic path can be reduced, and the mechanical strength (rigidity) can be increased. And it can also contribute to the improvement of the quietness mentioned later.

  And on the inner surfaces 2p and 2q of the casing 2, it corresponds to both end positions Xa and Xb (see FIG. 9) of the turning range Zm of the movable body Sm, and is arranged opposite to the axial direction Fs end of the coil 6. Two sets of magnet parts 8a and 8b are fixed. In this case, as shown in FIG. 6 (FIG. 8), one magnet portion 8a is composed of a magnet 8ap fixed to the inner surface 2p of the casing 2 and a magnet 8aq fixed to the inner surface 2q of the casing 2, and the other magnet. The part 8b is composed of a magnet 8bp fixed to the inner surface 2p of the casing 2 and a magnet 8bq fixed to the inner surface 2q of the casing 2. Thus, the magnet portions 8a and 8b are formed by a pair of magnets 8ap, 8aq, and 8bp, 8bq disposed on the inner surfaces 2p and 2q on opposite sides of the casing 2, which are opposed to both ends in the axial direction Fs of the coil 6, respectively. Composed. With this configuration, the number of magnets is doubled compared to the case where the magnets 8ap and 2bp are arranged only on the inner surface 2p on one side of the casing 2, but the response, output torque, magnetic balance and stability of the rotary solenoid 1 are stable. There is an advantage that can be implemented as the most advantageous form from the viewpoint of ensuring the performance.

  Moreover, one magnet 8ap can be fixed to the inner surface 2p of the casing 2 as follows. First, the magnet 8ap is formed in a flat rectangular parallelepiped shape as shown in FIGS. 3 and 4, and an inclined regulating surface 8x is formed by making one corner portion into a slice shape. The magnet 8ap is magnetized such that one of the two opposing surfaces having the largest area is an N pole and the other is an S pole. Therefore, by providing the regulation surface 8x, it is possible to prevent a manufacturing error that causes the front and back to be attached in the opposite direction.

  When the magnet 8ap is fixed to the inner surface 2p of the casing 2, the magnet 8ap is directly attracted and fixed to the inner surface 2p. At this time, on the inner surface 2p of the casing 2, as shown in FIGS. 3 and 4, three positioning projections 15 are integrally formed. As shown in FIG. 4, the positioning convex portions 15 can be easily provided by press molding or the like when the casing 2 is manufactured. Of the three positioning protrusions 15..., The first positioning protrusion 15 is locked to the restriction surface 8x of the magnet 8ap, the second positioning protrusion 15 is locked to the bottom side 8y of the magnet 8ap, The third positioning convex portion 15 is engaged with the vertical side portion 8z of the magnet 8ap. The third positioning convex portion 15 is shared by the magnet 8bp arranged next to the magnet 8ap. FIG. 5 shows the positioning protrusions 15 appearing on the outer surface of the casing 2.

  As described above, when the magnet 8ap is fixed to the inner surface 2p of the casing 2, the magnet 8ap is directly attracted and fixed to the inner surface 2p of the casing 2, and one or two formed integrally with the inner surfaces 2p and 2q of the casing 2. If positioning is performed by the positioning projections 15 as described above, it is not necessary to add a part for attaching the magnets 8ap, so that it is possible to easily and cost-effectively perform positioning of the magnets 8ap. In addition, since the magnets 8 ap and the inner surface 2 p of the casing 2 are in direct surface contact, there is an advantage that a good magnetic circuit (magnetic path) can be configured.

  The procedure for fixing the magnet 8ap to the inner surface 2p of the casing 2 has been described above. However, when other magnets 8bp are fixed to the inner surface 2p of the casing 2, as shown in FIG. The same operation can be performed except for the following points. Further, when the other magnets 8aq and 8bq are fixed to the other inner surface 2q of the casing 2, the magnets 8ap and 8bp can be fixed in the same manner as when the magnets 8ap and 8bp are fixed to the inner surface 2p of the casing 2.

  On the other hand, the holding block portion 5 in the movable body portion Sm described above is configured in consideration of the following points in relation to the fixed body portion Sc. First, restriction stopper portions 13a and 13b are provided on the left and right sides of the block lower part 5d, respectively, which are in contact with the inner surface of the casing 2 and perform position restriction corresponding to both end positions Xa and Xb of the turning range Zm. In the rotary solenoid 1 according to this embodiment, since the coil 6 is arranged on the movable body portion Sm, the movable body portion Sm can be reduced in weight and the moment of inertia can be reduced. As a result, even when the restriction stopper portions 13a and 13b are provided inside the casing 2, the impact sound at the time of collision can be reduced, and the quietness can be further improved. In particular, as described above, along with the increase in the thickness of the casing 2, the rigidity of the casing 2 with which the restriction stopper portions 13a and 13b collide increases, so that extremely high silence can be ensured.

  The following points are taken into consideration when the sucked child 7 is provided in the holding block portion 5. First, the attracted child 7 uses a pin member formed in the shape of a round bar, and is arranged so that the end face (illustration has a diameter of 1.7 [mm]) is parallel to the magnetic pole face of each magnet 8ap. . In this case, it is possible to prevent the holding block portion 5 from being removed by forming a step at an intermediate position of the pin member.

  Further, when the attracted child 7 is arranged, the distance between the pair of magnets 8ap, 8aq and 8bp, 8bq with respect to one magnet 8ap, 8bp is different from the distance with respect to the other magnet. That is, as shown in FIGS. 2 and 6, the attracted child 7 is arranged closer to the one magnet 8 ap (8 bp) side. With this arrangement, an appropriate force can be applied to the axial direction Fs of the rotating shaft 4, so that the movable body portion Sm can be prevented from rattling and unnecessary vibration and noise can be generated. There is an advantage that can be suppressed.

  The size of the end face of the attracted child 7, that is, the cross-sectional area perpendicular to the axis of the attracted child 7 is in the range of 0.1 to 10% with respect to the cross-sectional area perpendicular to the axis in the inner space of the coil 6. Select. By selecting in this way, it is possible to reliably realize a stable self-holding action from the viewpoint of securing a necessary suction force (holding torque) to obtain a self-holding force at the time of stopping and eliminating unnecessary suction force. Optimization can also be performed easily. More specifically, by making the suction torque of the sucked child 7 approximately 5 to 50% with respect to the torque when the coil 6 is energized, swinging and resting (self-holding by suction) is possible. Become. Therefore, if the suction torque of the sucked child 7 is 5 [%] which is the lower limit, it is desirable to select the cross-sectional area perpendicular to the axis of the sucked child 7 to 0.1 to 1 [%] and the upper limit. If it is 50 [%], it is desirable to select the cross-sectional area perpendicular to the axis of the attracted child 7 to 1 to 10 [%].

  When the cross-sectional area ratio is less than 0.1 [%], the cross-sectional area of the attracted child 7 becomes too small, so that the suction force is insufficient and the necessary holding torque cannot be secured, and the cross-sectional area ratio However, if the crossing area exceeds 10%, the cross-sectional area of the attracted child 7 approaches the area of the magnet 8ap, and the attractive force in the axial direction Fs becomes excessive. The contribution of the holding torque is reduced, and the holding state becomes unstable.

  The attracted child 7 is disposed in the inner space of the coil 6 and closer to the rotating shaft 4 than the central position of the coil 6. The center position is a direction perpendicular to the axis, and means the center position in the radial direction and the turning direction from the rotating shaft 4. By arranging in this way, the change angle of the suction force by the suctioned child 7 that changes linearly can be further increased, and the suction force can be maximized at both end positions Xa and Xb, so that a stable self-holding action can be secured. When the coil 6 is disposed outside the center position, the turning range Zm is narrowed and the torque at the start of turning is insufficient (torque obtained by subtracting the suction torque from the attracted child 7 from the torque generated by the coil 6 (startup (Corresponding to the torque of the hour) becomes too small.

In the case of illustration (FIG. 1), if the diameter of the sucked child 7 is selected to be 1 to 2 [mm] and arranged at a position of 10 [mm] in the radial direction with respect to the center of the rotating shaft 4, 0.005 A holding torque of .about.0.02 [Nm] can be obtained.
Further, when selecting the fixed position of the attracted child 7, as shown in FIG. 6 (FIG. 9), the center position 7c is the magnets 8ap, 8bp at both end positions Xa, Xb of the turning range Zm of the movable body Sm. Are selected so as to be located within a predetermined range Zs in the turning direction Fr with respect to the positions of the edge portions Ea, Eb. In the illustrated example, the predetermined range Zs is substantially the same as the diameter dimension of the attracted child 7. By selecting in this way, since the self-holding force can be applied even when no current is applied, the movable body Sm can be stopped at both end positions Xa and Xb, and the size of the sucked child 7 can be reduced. Even if it is reduced and the influence on energization (at the start of movement) is reduced, it can be surely stopped.

  On the other hand, the movable body portion Sm is connected to the winding ends 6s and 6t of the coil 6 and the length thereof is selected so as to allow the displacement of the movable body portion Sm in the turning range Zm. A pair of lead-out leads 11s and 11t are provided. Thereby, even if the movable body portion Sm is displaced over the turning range Zm, the lead wires 11s and 11t can easily absorb the displacement, so that the reliability of the electric system including the lead wires 11s and 11t can be improved. it can. Accordingly, it is desirable to select a length of the lead wires 11s and 11t that is sufficient to allow the displacement. Js and Jt indicate connecting portions between the winding ends 6s and 6t and the lead wires 11s and 11t. In this case, it is desirable to form a step in the portion of the holding block portion 5 where the connecting portions Js and Jt are located, and to ensure a separation distance so that the connecting portions Js and Jt do not contact each other.

  Further, when the lead wires 11s and 11t are arranged, as shown in FIGS. 2 and 3, the lead wires 11s and 11t are led out to a portion Xn 180 [°] opposite to the coil 6 in the holding block portion 5 (block upper portion 5u). Holding slit portions 12s and 12t for holding the lead wires 11s and 11t are provided. As a result, the intermediate positions of the lead wires 11s and 11t connected to the winding ends 6s and 6t in the coil 6 can be held by the holding slit portions 12s and 12t. The stress applied to the connecting portions of the lines 11s and 11t can be prevented, and disconnection at the connecting portions can be avoided.

  On the other hand, in FIG. 3, reference numeral 17 c denotes a lead wire cover that guides the lead wires 11 s and 11 t formed of an insulating material such as a rubber material or a synthetic resin material. The lead wire cover 17 c is disposed inside the casing 2. It is positioned as one form of the internal frame part 17 to distribute. Therefore, the lead wires 11s and 11t are led out of the casing 2 through the inside of the lead wire cover 17c. Providing such an inner frame portion 17 formed with the lead wire cover 17c can regulate the lead-out positions of the lead wires 11s and 11t arranged inside the casing 2, so that the lead wires can be stably guided, vibrations, etc. There is an advantage that interference and trouble with the coil 6 can be avoided and the reliability of the operation can be improved.

  Next, the function (action) of the rotary solenoid 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 9, the turning range Zm of the movable body Sm in the rotary solenoid 1 according to the present embodiment, that is, the angle between the left and right end positions Xa and Xb (turning range Zm) is approximately 20 as shown in FIG. [°] was set. Therefore, at one end position Xa that is the stop position of the movable body portion Sm, the restriction stopper portion 13a of the movable body portion Sm contacts the inner surface of the casing 2, and at the other end position Xb that is the other stop position of the movable body portion Sm. The restriction stopper portion 13 b of the movable body portion Sm comes into contact with the inner surface of the casing 2. Such a rotary solenoid 1 can be used as a two-position switching actuator utilizing its reciprocating rotation.

  First, the operation at the time of non-energization will be described. Since no current flows through the coil 6 during non-energization, the coil 6 is stopped at one end position Xa or the other end position Xb by the self-holding force of the movable body Sm.

  That is, as shown in FIG. 6, the magnets 8ap and 8aq are arranged on the one end position Xa side, the magnets 8bp and 8bq are arranged on the other end position Xb side, and the center of the movable body Sm in the turning direction is arranged. Since the attracted child 7 is fixed at the position, when the movable body portion Sm is located at the one end position Xa, the attracted child 7 of the movable body portion Sm is located near the edge portion Ea of the magnet 8ap (and 8aq). The attracted child 7 is attracted by the magnetic attraction force of the magnet 8ap (and 8aq), and the restriction stopper portion 13a comes into contact with the inner surface of the casing 2 and stops. When the movable body Sm is positioned at the other end position Xb, the attracted element 7 of the movable body Sm is positioned in the vicinity of the edge Eb of the magnet 8bp (and 8bq), and the magnetism of the magnet 8bp (and 8bq). The sucked child 7 is sucked by the suction force, and the restriction stopper portion 13b comes into contact with the inner surface of the casing 2 and stops.

  In FIG. 11, the characteristic line indicated by To indicates the magnitude of the output torque with respect to the rotation angle (turning range Zm) of the movable body portion Sm when no power is supplied. The output torque at the time of stoppage when not energized is about 0.02 [Nm]. The characteristic line indicated by Tor is the same characteristic line when the rotary solenoid shown in Patent Document 1 has the same dimensions as the rotary solenoid 1 according to this embodiment.

  Next, the operation during energization in the positive direction and energization in the negative direction will be described. Now, it is assumed that the rotary solenoid 1 is stopped at one end position Xa after energization in the negative direction.

  First, in this state, if a positive current is applied, a positive current flows through the coil 6. On the other hand, the lines of magnetic force generated by the magnets 8ap, 8aq, 8bp, 8bq fixed to the inner surfaces 2p, 2q of the casing 2 pass through the inside of the casing 2 as shown by a plurality of dotted arrows Fm ... in FIGS. , It passes through the space between the magnet 8ap and the magnet 8aq, and passes through the space between the magnet 8bp and the magnet 8bq. At this time, the direction of the magnetic force line between the magnet 8ap and the magnet 8aq is a direction from the magnet 8aq to the magnet 8ap, and the direction of the magnetic force line between the magnet 8bp and the magnet 8bq is the opposite direction between the magnet 8ap and the magnet 8aq. The direction is from 8 bp to the magnet 8bq.

  As a result, a Lorentz force according to Fleming's left-hand rule is generated at the winding portion of the coil 6 that is greatly affected by the magnetic field lines between the magnet 8ap and the magnet 8aq, and the coil 6, that is, the movable body portion Sm is at one end position Xa. To the other end position Xb. At the other end position Xb, the restriction stopper portion 13b comes into contact with the inner surface of the casing 2 and stops. Thereafter, even when the energization is canceled, the above-described self-holding force of the movable body portion Sm stops at the other end position Xb.

  FIG. 10 shows a response waveform of the magnitude of the current Ii [A] with respect to the time [sec] from the start of energization. As can be seen from the figure, it can be confirmed that the current Ii rises to the saturation current almost instantaneously from the time when the drive voltage is applied, that is, from the time 0 [sec]. In the figure, Ir [A] indicates a similar response waveform when the rotary solenoid shown in Patent Document 1 has the same dimensions as the rotary solenoid 1 according to this embodiment.

  As described above, in the rotary solenoid 1 according to the present embodiment, since there is no attracted child 7 having a small cross-sectional area in the inner space of the coil 6, the inductance of the coil 6 proportional to the magnetic permeability in the inner space of the coil 6. Becomes a slight size of several mH. As a result, when a drive voltage is applied, the current rises to the saturation current almost instantaneously, and extremely high responsiveness can be realized. In addition, since the overall weight of the movable body Sm is drastically reduced, high response and output torque can be ensured, which can greatly contribute to improvement in high-speed operation and productivity in the equipment used.

  On the other hand, if negative direction energization is performed in this state, a negative direction current flows through the coil 6. As a result, the Lorentz force according to the above-mentioned Fleming's left-hand rule is generated in the opposite direction to the forward energization at the winding portion of the coil 6 that is greatly affected by the magnetic field lines between the magnet 8bp and the magnet 8bq. That is, the movable body portion Sm is displaced from the other end position Xb to the one end position Xa. At the one end position Xa, the restriction stopper portion 13a comes into contact with the inner surface of the casing 2 and stops. After that, even if the energization is released, it stops at the one end position Xa by the self-holding force of the movable body Sm described above.

FIG. 11 shows two characteristic lines Ts and Tm with different specifications of the coil 6. Ts and Tm both indicate the magnitude of the output torque with respect to the rotation angle of the movable body Sm when energized. The specification of the exemplified coil 6 is as follows.
Wire diameter Number of turns Winding resistance Current Voltage AT
[Φ] [T] [Ω] [A] [V]
Ts: 0.12 648 45 0.53 24 345.6
Tm: 0.14 460 21 1.14 24 525.7

  Note that the characteristic lines indicated by Tsr and Tmr in FIG. 11 are similar characteristic lines when the rotary solenoid shown in Patent Document 1 has the same dimensions as the rotary solenoid 1 according to the present embodiment. That is, it means that the outer size, current, and voltage of the rotary solenoid at Tsr are set to be the same as Ts, and the outer size, current, and voltage of the rotary solenoid at Tmr are set to be the same as Tm.

  Therefore, according to the rotary solenoid 1 according to the present embodiment as described above, as a basic configuration, the coil 6 held by the holding block portion 5, the axis 6 of the coil 6 fixed to the holding block portion 5 and the coil 6. A movable body Sm provided with a rotating shaft 4 arranged in parallel with Ls and an attracted child 7 formed of a magnetic material fixed at a predetermined position of the holding block 5 is provided. The formed casing 2 is fixed to the inner surfaces 2p and 2q of the casing 2 and arranged opposite to the end portion of the axial direction Fs of the coil 6, and at both end positions Xa and Xb of the turning range Zm of the movable body portion Sm. Since the fixed body portion Sc is provided with the two magnet portions 8a and 8b arranged correspondingly, the heavy magnets 8ap, 8bp, 8aq, and 8bq are fixed on the fixed side. 2 is fixed to the inner surface 2p, 2q of 2 and the relatively light weight coil 6 is supported on the rotating shaft 4 on the movable side, so that the entire weight of the movable body Sm can be drastically reduced, and high responsiveness and output Torque can be secured. In addition, since there is no other than the attracted child 7 having a small cross-sectional area in the inner space of the coil 6, the inductance of the coil 6 is slightly large, and when the drive voltage is applied, the current is almost instantaneously applied. Extremely high responsiveness can be realized, such as being able to start up to a saturation current. As a result, it is possible to greatly contribute to improvement in high-speed operation and productivity in the equipment used. Further, magnets 8ap, 8bp, 8aq, 8bq are arranged on the inner surface of the casing 2 facing the axial direction Fs end of the coil 6 supported by the rotating shaft 4, and an arrangement space for the inner surfaces 2p, 2q of the casing 2 is provided. Since the size of the magnets 8ap, 8bp, 8aq, and 8bq can be increased as long as it is allowed, the overall size of the rotary solenoid 1 can be reduced while ensuring the necessary performance.

  Next, a rotary solenoid 1 according to a modified embodiment of the present invention will be described with reference to FIGS.

  The modified embodiment shown in FIG. 12 is the same as the embodiment shown in FIG. 3 except that the fuse 31 is connected to one lead wire 11t arranged inside the lead wire cover 17c. is there. Therefore, other configurations are the same as those of the embodiment shown in FIG. As described above, since there is a space below the magnets 8ap, it can be used for routing the lead wires 11s and 11t, and can be used for disposing various accessory elements and circuits (such as correction elements) as necessary. can do.

  In the modified embodiment shown in FIG. 13, the lead-out leads 11s and 11t and the regulating stopper portions 13a and 13b are different. In other words, in this modified embodiment, the FPC (flexible printed circuit board) 32 is used when configuring the lead wires 11s and 11t. Reference numeral 33 denotes a connector for connecting the FPC 32 and an external lead wire (11s, 11t). Further, in the embodiment shown in FIG. 1, the regulation stopper portions 13 a and 13 b are brought into contact with the inner surface located on the side surface of the casing 2, but the regulation stopper portions 13 a and 13 b according to the modified embodiment have the formation positions. It is changed so as to be brought into contact with the inner surfaces of the upper surface portions 2ma and 2mb of the casing 2. Any of them can have the same function as that of the embodiment shown in FIG.

  In the modified embodiment shown in FIGS. 14 and 15, the magnet portions 8a and 8b are modified. That is, in the embodiment shown in FIG. 2, two sets of magnet portions 8a and 8b are configured by a pair of magnets 8ap and 8aq and 8bp and 8bq, respectively, and inner surfaces 2p and 2q located on both sides of the movable body portion Sm, respectively. By fixing, the movable body part Sm is fixed so as to be sandwiched from both sides, but in the modified embodiment shown in FIG. 14, the magnets 8ap and 8bp are fixed only to the inner surface 2p on one side. Thus, if the magnet parts 8a and 8b are constituted by the single magnets 8ap and 8bp disposed on the inner surface 2p on one side of the casing 2 facing the one end part of the axial direction Fs of the coil 6, the minimum necessary parts Since the number of points is sufficient, the rotary solenoid 1 can be implemented as the most advantageous form from the viewpoint of downsizing and cost reduction. Further, since the thicknesses of the magnets 8ap and 8bp can be increased, a wider space for arranging the lead wire cover 17c described above can be secured.

  FIG. 15 shows a modification of FIG. In the modified example shown in FIG. 15, with respect to the modified embodiment shown in FIG. 14, the inner surface 2 q on the other side facing the inner surface 2 p on one side of the casing 2 protrudes from the inner surface 2 q on the other side, and the magnets 8 ap, Magnetic flux collecting portions 14a and 14b facing 8 bp are provided. Thereby, since the magnetic flux density which passes the coil 6 can be raised more by the convergence effect | action of the magnetic force line by the magnetic flux collection parts 14a and 14b, it can contribute to the further improvement of responsiveness and an output torque.

  Other structures in FIGS. 14 and 15 are the same as those of the embodiment shown in FIGS. In addition, in the modified embodiment shown in FIGS. 12 to 15, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals, the configuration is clarified, and detailed description thereof is omitted.

The modified embodiment shown in FIGS. 16 to 20 shows a modified form of the holding block unit 5,
A modified form in which an internal frame portion 17 is provided inside the casing 2 is shown. The overall basic configuration is a type in which the magnets 8ap and 8bp shown in FIGS. 14 and 15 are arranged only on the inner surface of one side.

  In this case, as shown in FIGS. 17 and 18, the holding block portion 5 is obtained by fixing a printed wiring board 5p on one side of the holding block portion 5, and when the holding block portion 5 is formed of a synthetic resin material. In addition, the holding block portion 5 and the printed wiring board 5p can be integrally formed by insert molding. As shown in FIG. 18, the printed wiring board 5p is provided with winding-side land portions 21s and 21t at positions where the winding ends 6s and 6t of the coil 6 are easily connected on the board surface. The lead-out land portions 22s and 22t for connecting 11t are provided in positions in the left-right direction and as far apart as possible. Then, a conductive pattern portion 23s is provided between the winding-side land portion 21s and the lead-out land portion 22s to constitute the circuit wiring portion 5ps, and a conductive pattern portion 23t is provided between the winding-side land portion 21t and the lead-out land portion 22t. To form the circuit wiring portion 5pt.

  As a result, the winding ends 6s and 6t of the coil 6 can be connected to the winding-side land portions 21s and 21t by soldering or the like, and the pair of lead-out lead wires 11s and 11t are soldered to the lead-side land portions 22s and 22t, respectively. Can be connected by attaching. Therefore, if such a printed wiring board 5p is provided, both the winding ends 6s and 6t of the coil 6 and the pair of lead wires 11s and 11t can be fixed on the printed wiring board 5p. , 6t and the pair of lead wires 11s, 11t can be easily and reliably connected.

  In addition, the lead positions of the pair of lead wires 11 s and 11 t are set by the circuit wiring portions 5 ps and 5 pt, and the lead wires 11 s leading around the inside of the casing 2 by separating the pair of lead positions as much as possible. Since the radius of curvature at the curved portion of 11t can be increased, the durability of the lead wires 11s and 11t and the connection portion with respect to repetitive rotational displacement of the movable body portion Sm can be further increased. Furthermore, the fixed fixing of the connection part can improve the fixing strength and durability against vibrations and the like, and even when the holding block portion 5 and the printed wiring board 5p are integrally formed by insert molding or the like, stability during molding is ensured. There is an advantage that good molding can be performed by securing the property.

  On the other hand, as shown in FIG. 20, the internal frame portion 17 is integrally formed of a synthetic resin material to form a rectangular frame shape. In particular, the shape of the outer surface is selected so that it can be positioned and disposed (fitted) inside the housing 2m in the casing 2, as shown in FIG. Then, a lead wire cover 17c that guides the lead wires 11s and 11t is formed using the lower frame member and the left and right frame members of the inner frame portion 17. The lead wire cover 17c has the same function as the lead wire cover 17c shown in FIG. Therefore, a part of the inner frame portion 17 is also used as the lead wire cover 17c, and the lead position of the lead wires 11s and 11t arranged inside the casing 2 can be regulated, so that the inner frame portion 17 can be guided stably. Interference with the coil 6 due to vibration or the like and trouble can be avoided, and the basic effect that the reliability of operation can be enhanced can be enjoyed.

  Further, by using the left frame member and the right frame member of the inner frame portion 17, the position restriction corresponding to the both end positions Xa and Xb of the turning range Zm by contacting the restriction stopper portions 13a and 13b in the holding block portion 5 is achieved. The block restricting portions 18a and 18b to be performed are integrally formed. If such block restricting portions 18a and 18b are integrally formed, as shown in FIG. 19, the displacement of the holding block portion 5 is restricted by the collision with the inner frame portion 17, so the shape of the inner frame portion 17 and By selecting the material, there is an advantage that the bounce can be reduced and the noise can be reduced by absorbing the impact at the time of collision.

  Further, by utilizing the upper frame member of the inner frame portion 17, one bearing portion 3r of the pair of bearing portions 3f and 3r is integrally formed. If comprised in this way, since a part of internal frame part 17 can be combined with the bearing part 3r, the separate bearing part 3r becomes unnecessary. This can contribute to cost reduction and improvement in manufacturability by reducing the number of parts, and can accurately position the bearing portion 3r with respect to other functional parts (for example, the block restriction portions 18a and 18b). There are advantages. In addition, in the modified embodiment shown in FIGS. 16 to 20, the same parts as those in FIGS. 1 to 15 are denoted by the same reference numerals, the configuration is clarified, and detailed description thereof is omitted.

  As described above, the best embodiment and the modified embodiment have been described in detail. However, the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, numerical value, etc. Changes, additions and deletions can be made arbitrarily without departing from the scope.

  For example, although the case where the single coil 6 was provided was shown, you may comprise as the coil 6 by combining two or more coils. Further, a pair of lead wires connected to both ends 6s and 6t of the coil 6 and arranged in the casing 2 with the length selected to allow the displacement of the movable body Sm in the turning range Zm. Although the configuration in which 11s and 11t are provided is illustrated, the casing 2 is provided with connecting terminal portions penetrating the front and back, and the winding ends 6s and 6t are connected to the connecting terminal portion from the inside of the casing 2. In addition, other connection forms such as connecting the lead wires 11s and 11t from the outside are not excluded. Furthermore, although the case where the restriction stopper portions 13a and 13b are provided on the holding block portion 5 is shown, the restriction stopper portions 13a and 13b may be provided separately or provided on the rotating shaft 4 protruding outside the casing 2. The case is not excluded. On the other hand, the magnets 8ap, 8bp, 8aq, 8bq are attracted and fixed to the inner surfaces 2p, 2q of the casing 2 and are positioned by the three positioning protrusions 15 formed integrally with the inner surfaces 2p, 2q of the casing 2. However, one positioning convex part 15 formed in the rectangular frame shape may be sufficient, and the case where two or four or more positioning convex parts 15 ... are provided is not excluded. When the magnets 8ap are fixed to the inner surface 2p of the casing 2, they may be adsorbed and fixed as they are, or an adhesive may be added if necessary. Moreover, although the case where the movable body part Sm was integrally molded by the insert molding method was shown, the coil 6, the rotating shaft 4 and the attracted child 7 are respectively assembled to the holding block part 5 integrally molded as one part. Form may be sufficient.

  The rotary solenoid according to the present invention performs two-position switching in various devices having various switching functions such as a sorting function for money and banknotes, a sorting function for postal items, a conveyance path switching function for printed matter, and an optical path switching function. It can be used as a switching actuator.

Claims (16)

  A rotary solenoid comprising a fixed body portion having a casing provided with a pair of bearing portions positioned at the front and rear, and a movable body portion having a rotating shaft that is rotatably supported by the pair of bearing portions. Formed by a coil held on the holding block, the rotating shaft fixed to the holding block and arranged in parallel to the axis of the coil, and a magnetic material fixed to a predetermined position of the holding block The movable body portion provided with the attracted child, a casing formed of a magnetic material, and fixed to the inner surface of the casing, and disposed opposite to the axial end of the coil, and A rotary solenoid comprising the fixed body portion provided with two sets of magnet portions arranged corresponding to both end positions of the turning range of the movable body portion.   The movable body portion includes a single coil, is connected to both ends of the winding of the coil, and the length is selected to allow the displacement of the movable body portion in the turning range. The rotary solenoid according to claim 1, further comprising a pair of lead wires arranged inside.   The holding block portion is provided with a holding slit portion for holding the lead-out lead wire at a site opposite to the coil by 180 [°] when viewed from the rotating shaft. Rotary solenoid.   The said holding block part is equipped with the printed wiring board which has a circuit wiring part which fixes to the single side | surface of this holding block part, and connects both ends of the coil | winding of the said coil, and a pair of said lead-out lead wire. The rotary solenoid according to 2.   2. The rotary solenoid according to claim 1, wherein the holding block portion includes a restriction stopper portion that abuts against an inner surface of the casing and performs position restriction corresponding to both end positions of the turning range.   2. The rotary solenoid according to claim 1, wherein the magnet portion is constituted by a single magnet disposed on an inner surface on one side of the casing facing one end portion in the axial direction of the coil.   The rotary solenoid according to claim 6, wherein a magnetic flux collecting portion that protrudes from the inner surface of the other side and faces each of the magnets is provided on the inner surface of the other side facing the inner surface of the one side of the casing.   2. The rotary solenoid according to claim 1, wherein the magnet portion is constituted by a pair of magnets disposed on inner surfaces of opposite sides of the casing that are opposed to both end portions in the axial direction of the coil.   The rotary according to any one of claims 5 to 8, wherein the magnet is fixed to the inner surface of the casing by suction and is positioned by one or more positioning projections integrally formed on the inner surface of the casing. solenoid.   The rotary solenoid according to claim 1, wherein the attracted child is disposed in an inner space of the coil and closer to the rotating shaft than a central position of the coil.   9. The rotary solenoid according to claim 8, wherein the attracted child is arranged such that a distance to one magnet of the pair of magnets is different from a distance to the other magnet.   2. The suction element has a cross-sectional area perpendicular to the axis selected in a range of 0.1 to 10% with respect to a cross-sectional area perpendicular to the axis in the inner space of the coil. Rotary solenoid.   The fixed position is selected so that the attractant is positioned at a predetermined range in a turning direction with respect to a position of an edge portion of the magnet at both end positions of the turning range. , 8 or 11 Rotary solenoid.   The fixed body portion includes an inner frame portion having a lead wire cover for guiding at least the lead-out lead wire by being positioned and disposed inside the casing and integrally formed. The rotary solenoid according to 1.   15. The inner frame portion integrally includes a pair of left and right block restricting portions that abut against a restricting stopper portion in the holding block portion and perform position restriction corresponding to both end positions of the turning range. Rotary solenoid.   The rotary solenoid according to claim 14 or 15, wherein the inner frame portion integrally includes one bearing portion of the pair of bearing portions.

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