JP2014022703A - Rotary solenoid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost based on reduction in the number of components and reduction in man-hour for assembly and to make a rotary solenoid small-sized and compact as a whole.SOLUTION: The rotary solenoid comprises: a shaft 3 which is supported in a freely rotatable manner by bearing portions 2s... provided in a casing 2; a movable body part 4 including a magnet portion 4m which is rotatable by fixing one end side 4c to the shaft 3 and making another end side 4s into free end; and a field magnet part 6 which is fixed to the casing 2 and capable of attracting or repulsing the movable body part 4 by being controlled in power feeding. In particular, in the movable body part 4, the shaft 3 is disposed at a position P1 corresponding to one corner in a triangle, and the magnet portion 4m is disposed so as to generate an S pole and an N pole at positions P2 and P3 corresponding to remaining two corners, respectively. The field magnet part 6 includes a single coil 6c which is disposed while opposing one end face 6s in a coil axial direction Fc to the magnet portion 4m. Further, the rotary solenoid comprises a movable body regulation part 7 which regulates a range for the movable body part 4 to be rotated within a predetermined range Zr.

Description

  The present invention relates to a rotary solenoid capable of repeatedly rotating and displacing a shaft within a predetermined angle range.

  Conventionally, a rotary solenoid disclosed in Patent Document 1 is known as a typical rotary solenoid that repeatedly rotates and displaces a shaft within a predetermined angle range.

  The rotary solenoid disclosed in the same document 1 can easily set the magnitude of the holding force when the shaft portion is not energized to improve usability and versatility, and improve torque and efficiency. The purpose is to reduce size, cost, and reliability by simplifying the structure and reducing the number of parts. The specific structure is a shaft part that is rotatably supported by the casing. And while fixing one end to this shaft part and making the other end a free end, it is fixed to the movable part having the magnet and the casing, and arranged at predetermined intervals on both sides in the movable direction of the movable part, A pair of electromagnetic coil parts having an iron core that selectively attracts the movable part by energization control is provided.

JP-A-9-342364

  However, the conventional rotary solenoid described above has the following problems to be solved.

  First, since the electromagnetic coil part having the coil and the iron core is independently arranged on both sides of the movable part having the magnet, the total number of parts constituting the electromagnetic coil part is two coils and two iron cores. Is required. Therefore, the cost of the components is increased due to an increase in the number of components in the entire rotary solenoid, and the manufacturing cost is increased due to an increase in the number of assembly steps.

  Second, since the length of the movable portion in the direction perpendicular to the shaft axis is increased, the displacement range of the distal end of the movable portion is increased, and a pair of electromagnetic coil portions are opposed to both sides of the displacement space of the movable portion. Since the layout structure is adopted, both vertical and horizontal sizes are increased. Eventually, it becomes difficult to rationally arrange the components inside the rectangular parallelepiped casing, and unnecessary dead space is generated, resulting in an increase in the size 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 problems described above, the present invention fixes the casing 2, the shaft 3 rotatably supported by the bearing portions 2s, 2s provided in the casing 2, the one end side 4c to the shaft 3, and A movable body portion 4 having a magnet portion 4m that can be turned by making the other end side 4s a free end, and a field portion that is fixed to the casing 2 and that can attract or repel the movable body portion 4 by power feeding control. 6, the shaft 3 is disposed at a position P1 corresponding to one corner of the triangle, and the S pole is disposed at positions P2 and P3 corresponding to the remaining two corners. A field portion 6 having a movable body portion 4 provided with magnet portions 4m each generating N poles, and a single coil 6c arranged with one end face 6s in the coil axial direction Fc facing the magnet portion 4m. Characterized by comprising a movable body regulating portion 7 to regulate the extent to which the movable body 4 is pivoted in a predetermined range Zr.

  In this case, according to a preferred aspect of the invention, the magnet portion 4m is formed in an elongated flat rectangular parallelepiped shape, so that the magnet 4ma having the S pole and the N pole respectively magnetized on both sides in the longitudinal direction is used alone, or this magnet 4ma and a combination of a back yoke 4my disposed on the back side of the magnet 4ma. Further, the movable body portion 4 is covered to hold the magnet portion 4m and to be integrated with the shaft 3, and at least a part of the facing surface facing the field portion 6 is provided with an opening portion 11s. The holding block part 11 which exposes at least one part of the magnet part 4m by forming can be provided. At this time, the movable body restricting portion 7 is formed in the pair of restricting wall surface portions 2 p and 2 q formed on the inner wall of the casing 2 and the holding block portion 11, thereby being brought into contact with the restricting wall surface portions 2 p and 2 q and regulated in position. It can comprise and comprise the controlled surface parts 11p and 11q. Further, the field magnet portion 6 can be provided with an E-shaped yoke 12 in which a single coil 6c is loaded.

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

  (1) Since the field portion 6 having the single coil 6c in which one end face 6s in the coil axis direction Fc is arranged to face the magnet portion 4m is provided, the field portion is independent of the conventional rotary solenoid. The quantity of can be halved. Therefore, it is possible to reduce the cost for parts by reducing the number of parts, and to reduce the cost for manufacturing by reducing the number of assembly steps.

  (2) Since the length of the movable body portion 4 in the direction perpendicular to the axis of the shaft 3 can be shortened and the field portion 6 is not disposed on both sides of the displacement space of the movable body portion 4, the casing 2 is formed in a rectangular parallelepiped shape. Even in this case, rational component placement can be easily performed. As a result, generation of unnecessary dead space can be greatly reduced, and the entire rotary solenoid can be reduced in size and size.

  (3) According to a preferred embodiment, the magnet portion 4m may be formed in the shape of an elongated flat rectangular parallelepiped so that the magnet 4ma having the S pole and the N pole respectively magnetized on both sides in the longitudinal direction can be used alone, or Since this magnet 4ma and a back yoke 4my arranged on the back side of the magnet 4ma may be combined, the degree of freedom in designing the size and performance of the rotary solenoid 1 can be increased.

  (4) According to a preferred embodiment, the movable body portion 4 is covered to hold the magnet portion 4m and integrated with the shaft 3, and at least part of the facing surface facing the field portion 6 is provided. By providing the holding block portion 11 that exposes at least a part of the magnet portion 4m by forming the opening portion 11s, the air gap between the magnet portion 4m and the field portion 6 can be set to a minimum. The magnetic characteristic of the magnet part 4m can be utilized to the maximum.

  (5) When the movable body restricting portion 7 is configured according to a preferred embodiment, the pair of restricting wall surface portions 2p and 2q formed on the inner wall of the casing 2 and the restricting wall surface portions 2p and 2q are formed on the holding block portion 11. If the structure is provided with the regulated surface portions 11p and 11q that are in contact with each other and the position is regulated, a part of the inner wall of the casing 2 and the holding block portion 11 can be used as the movable body regulating portion 7. Can contribute to simplification, cost reduction and size reduction.

  (6) If the E-shaped yoke 12 for loading the single coil 6c is provided in the field magnet portion 6 according to a preferred embodiment, a magnetic circuit is formed by the E-shaped yoke 12, so that the high efficiency of the rotary solenoid 1 is achieved. And can contribute to higher performance.

A sectional front view of a rotary solenoid according to a preferred embodiment of the present invention, AA line sectional view in FIG. BB line sectional view in FIG. An exploded front view of the movable body in the rotary solenoid, A bottom view showing a part of the movable body in the rotary solenoid, Connection diagram of the electrical system when driving the rotary solenoid, Drive explanatory diagram of the rotary solenoid, Another drive explanatory diagram of the rotary solenoid,

  Next, preferred embodiments 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 described with reference to FIGS.

  The rotary solenoid 1 has a casing 2 formed of a non-magnetic material such as plastic. As shown in FIG. 2, the casing 2 has a casing body 2m and a casing lid for closing the opening of the casing body 2m. 2c. Reference numeral 3 denotes a round bar-shaped shaft (output shaft) formed of a magnetic material, and a pair of bearing portions 2s and 2s provided at positions offset to one side (upper side) of the casing body 2m and the casing lid 2c, respectively. Is supported rotatably.

  On the other hand, the movable body portion 4 is fixed to the shaft 3 located inside the casing 2. The movable body portion 4 has a holding block portion 11 formed of a nonmagnetic material such as plastic. As shown in FIG. 1, the holding block portion 11 (movable body portion 4) has a substantially triangular shape when viewed from the front. A magnet portion 4 m is disposed on the other end side 4 s of the body portion 4. Therefore, an S pole and an N pole are generated by the magnet part 4m at positions P2 and P3 corresponding to the remaining two corners in the triangle, respectively. Thereby, since the movable body part 4 (holding block part 11) has one end side 4c fixed to the shaft 3 and the other end side 4s becomes a free end, it can turn around the shaft 3 as a fulcrum.

  In this case, the holding block portion 11 holds the magnet portion 4m by covering. In the case of illustration, as shown in FIG. 4, the holding block portion 11 is constituted by a holding block main body portion 11b and a holding block cover portion 11c attached to the holding block main body portion 11b, so that a concave portion formed in the holding block main body portion 11b. If the magnet portion 4m is accommodated in the holding block, the holding block cover portion 11c attached to the holding block main body portion 11b holds the magnet portion 4m. At this time, the magnet part 4m may be entirely covered with the holding block part 11, but as illustrated, the magnet part 4m faces the field part 6 on the other end side 4s of the holding block part 11 (movable body part 4). It is desirable to form an opening 11s in at least a part of the facing surface to expose at least a part of the magnet part 4m. Specifically, as shown in FIG. 5, the entire holding block cover portion 11c is formed in a rectangular frame shape, and a pair of holding band portions 11cb and 11cb are integrally formed in the frame. As a result, as shown in FIG. 6, the air gap Ga between the magnet part 4m and the field part 6 can be set to a minimum, so that there is an advantage that the magnetic characteristics of the magnet part 4m can be utilized to the maximum.

  Further, the magnet portion 4m is formed in an elongated flat rectangular parallelepiped shape, so that a set of a magnet 4ma having a south pole and a north pole respectively magnetized on both sides in the longitudinal direction and a back yoke 4my disposed on the back side of the magnet 4ma. Configured by combination. In addition, the magnet part 4m may be configured by combining the magnet 4ma and the back yoke 4my as described above, or only the magnet part 4m may be used alone. When the magnet part 4m is used alone, the holding block part 11 can be formed of a magnetic material. As described above, the magnet portion 4m may use the magnet 4ma alone, or may be constituted by a combination of the magnet 4ma and the back yoke 4my. The degree of freedom can be increased.

  On the other hand, a field part 6 having a single coil 6 c is disposed inside the casing 2. In this case, the single coil 6c is arranged with one end face 6s in the coil axial direction Fc facing the magnet portion 4m (magnet 4ma). In the illustrated example, the field portion 6 is provided with an E-shaped yoke 12 into which the single coil 6c is loaded. Thereby, since the magnetic circuit by the E-shaped yoke 12 is comprised, it can contribute to the high efficiency and high performance of the rotary solenoid 1. FIG. Reference numeral 21 denotes a coil bobbin formed of an insulating material such as plastic and wound with a single coil 6c.

  Furthermore, a movable body restricting portion 7 for restricting the turning range of the magnet portion 4m to a predetermined range Zr is provided inside the casing 2. The illustrated movable body restricting portion 7 includes a pair of restricting wall surface portions 2p and 2q formed on the inner wall of the casing 2 and a holding block portion 11 so as to contact the restricting wall surface portions 2p and 2q to be position-controlled. It is comprised by the regulation surface parts 11p and 11q. If such a movable body restricting part 7 is provided, the inner wall of the casing 2 and a part of the holding block part 11 can be used as the movable body restricting part 7, further simplifying the overall structure, reducing costs, There is an advantage that can contribute to size reduction.

  Therefore, according to the rotary solenoid 1 according to this embodiment, the shaft 2, the shaft 3 rotatably supported by the bearing portion 2s provided in the casing 2, and the one end side 4c are connected to the shaft 3. The movable body portion 4 having a magnet portion 4m that can be turned by fixing and the other end side 4s as a free end, and the casing 2 can be fixed, and the movable body portion 4 can be attracted or repelled by power feeding control. In particular, the shaft 3 is disposed at a position P1 corresponding to one corner of the triangle and the S and N poles are positioned at positions P2 and P3 corresponding to the remaining two corners. A movable body portion 4 provided with a magnet portion 4m each generating a magnetic field, a field portion 6 having a single coil 6c arranged with one end face 6s in the coil axial direction Fc facing the magnet portion 4m, and possible To become a movable member restricting portion 7 for regulating the range of the body portion 4 to pivot in a predetermined range Zr, it is possible to halve the number of independent field part to conventional rotary solenoid. Therefore, it is possible to reduce the cost for parts by reducing the number of parts, and to reduce the cost for manufacturing by reducing the number of assembly steps. Moreover, since the length of the movable body part 4 in the direction perpendicular to the axis of the shaft 3 can be shortened and the field part 6 is not disposed on both sides of the displacement space of the movable body part 4, the casing 2 is formed in a rectangular parallelepiped shape. Even so, rational component placement can be easily performed. As a result, generation of unnecessary dead space can be greatly reduced, and the entire rotary solenoid can be reduced in size and size.

  On the other hand, FIG. 6 shows a drive circuit D in the rotary solenoid 1. The drive circuit D supplies power to or feeds a pair of connection leads 13a and 13b derived from the single coil 6c, and a DC voltage supplied from the DC source 31 to the connection leads 13a and 13b. An operation switch 32 is provided for stopping the polarity and switching the polarity for inverting the polarity of the DC voltage.

  Next, the usage method and operation | movement of the rotary solenoid 1 which concern on this embodiment are demonstrated with reference to FIGS.

  When the rotary solenoid 1 is used, as shown in FIG. 6, the drive circuit D is connected to the connection leads 13a and 13b of the single coil 6c. FIG. 6 shows a state in which the operation switch 32 is switched to the power supply position. Therefore, power is supplied to the single coil 6c, and the S pole and the N pole shown in FIG. The polarity (S pole, N pole) of the magnet 4ma is as shown in FIG. As a result, the S pole side of the magnet 4ma is attracted to the N pole side of the E-shaped yoke 12, and the N pole side of the magnet 4ma repels against the N pole side of the E-shaped yoke 12. As a result, the shaft 3 is rotationally displaced in the clockwise direction in the direction of the arrow Fr shown in FIG. 8, and the movable body portion 4 is such that the regulated surface portion 11q of the movable body portion 4 abuts on the regulated wall surface portion 2q of the casing 2 It stops at the position shown in FIG.

  On the other hand, it is assumed that the operation switch 32 is switched to the power supply stop position from this state. In this case, as shown in FIG. 7, the magnetic field portion 6 does not generate its own magnetic pole based on power feeding. However, since the magnetic field generated by the magnet 4ma is maintained, the position of the movable body 4 is held by a magnetic circuit formed by the magnet 4ma and the E-shaped yoke 12. A dotted line Mm shown in FIG. 7 indicates a magnetic force line passing through the magnetic circuit when power feeding is stopped.

  On the other hand, it is assumed that the operation switch 32 is switched from this state to the reverse feeding position with the polarity reversed. In this case, as shown in FIG. 8, the S-pole and the N-pole reversed with respect to the polarity shown in FIG. As a result, the N pole side of the magnet 4ma is attracted to the S pole side of the E-shaped yoke 12, and the S pole side of the magnet 4ma repels against the S pole side of the E-shaped yoke 12. As a result, the shaft 3 is rotationally displaced in the counterclockwise direction in the direction of the arrow Fr shown in FIG. 8, and the movable body portion 4 has the regulated surface portion 11p of the movable body portion 4 abutted against the regulation wall surface portion 2p of the casing 2. It stops at the position shown in FIG. Dotted lines Mp and Mq shown in FIG. 8 indicate lines of magnetic force that pass through the magnetic circuit during power feeding. At this time, an angle range in which the shaft 3 is rotationally displaced is a predetermined range Zr shown in FIG.

  The preferred embodiment has been described in detail above, but the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, and the like are within the scope not departing from the gist of the present invention. , Can be changed, added and deleted arbitrarily.

  For example, the opening 11s is formed in at least a part of the facing surface facing the field magnet part 6 on the other end side 4s of the holding block part 11 (movable body part 4), and at least a part of the magnet part 4m is exposed. Although the form is illustrated, the form in which the entire magnet part 4m is covered with the holding block part 11 is not excluded. Moreover, although the holding block part 11 illustrated the form comprised by the combination of the holding block main-body part 11b and the holding block cover part 11c, the holding block part 11 is integrally molded (insert molding) by inserting the magnet part 4m. May be. On the other hand, the movable body restricting portion 7 is formed on the inner wall of the casing 2 with a pair of restricting wall surface portions 2p and 2q, and formed on the holding block portion 11 so that the movable body restricting portion 7 is in contact with the restricting wall surface portions 2p and 2q. Although the form comprised by the control surface parts 11p and 11q was illustrated, the other form, for example, the form which provides an independent stopper mechanism separately, and the form provided in the exterior of the casing 2, are not excluded. Further, although it is desirable that the E-type yoke 12 is provided in the field magnet portion 6, a form (shape) different from the E-type yoke 12 and a form in which no yoke is provided are not excluded.

  The rotary solenoid according to the present invention can be used by repeatedly rotating and displacing a shaft within a predetermined angular range, such as a gate mechanism that opens and closes a passage and passes an object having a predetermined weight one by one. Available for use.

  1: rotary solenoid, 2: casing, 2s: bearing portion, 2s: bearing portion, 2p: restriction wall surface portion, 2q: restriction wall surface portion, 3: shaft, 4: movable body portion, 4c: one end side of the movable body portion, 4s: the other end side of the movable body part, 4m: magnet part, 4ma: magnet, 4my: back yoke, 6: field part, 6s: one end surface of a single coil, 6c: single coil, 7: movable body Restriction part, 11: Holding block part, 11s ...: Opening part, 11p: Restricted surface part, 11q: Restricted surface part, 12: E-shaped yoke, P1: Corner part, P2: Corner part, P3: Corner part, Fc: Coil axial direction, Zr: Predetermined range

JP-A-11-178306

Claims (5)

  A movable body having a casing, a shaft rotatably supported by a bearing portion provided in the casing, and a magnet portion that can turn by fixing one end side to the shaft and making the other end side a free end. And a field solenoid part that is fixed to the casing and is capable of attracting or repelling the movable body part by power feeding control, at a position corresponding to one corner of the triangle The movable body part in which the shaft is arranged and the magnet part in which the S pole and the N pole are generated at positions corresponding to the remaining two corners, and one end face in the coil axis direction face the magnet part. A rotary solenoid having a field portion having a single coil arranged in a row and a movable body restricting portion for restricting a range in which the movable body turns to a predetermined range. De.   The magnet portion is formed in an elongated flat rectangular parallelepiped shape, so that a magnet having S poles and N poles magnetized on both sides in the longitudinal direction is used alone, or a back yoke disposed on the back side of the magnet and the magnet. The rotary solenoid according to claim 1, wherein the rotary solenoid is combined.   The movable body portion is covered to hold the magnet portion and to be integrated with the shaft, and at the same time, forming an opening in at least a part of the facing surface facing the field portion. The rotary solenoid according to claim 1, further comprising a holding block portion that exposes at least a part of the magnet portion.   The movable body restricting portion includes a pair of restricting wall surface portions formed on the inner wall of the casing, and a regulated surface portion that is positioned on the holding block portion so as to abut on the restricting wall surface portion. The rotary solenoid according to claim 3.   The rotary solenoid according to any one of claims 1 to 4, wherein the field magnet section includes an E-shaped yoke in which the single coil is loaded.

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