JP5317113B2 - Rotary solenoid - Google Patents

Description

  The present invention relates to a rotary solenoid, and more particularly, to a rotary solenoid having a structure that can be easily downsized and is suitable for obtaining high torque.

  The rotary solenoid generally has a configuration such as a coil, a fixed magnetic pole, a rotor, a permanent magnet, a stopper, and a shaft. In many cases, the rotor rotates until it is regulated by the stopper by the magnetic force generated when the coil is energized, and when the energization is stopped, the rotor is attracted to the permanent magnet and returned to the position before the energization. .

  In such a rotary solenoid, various structures have been proposed in order to increase the torque. For example, in the rotary solenoid disclosed in Japanese Patent Application Laid-Open No. 2004-172353, a pair of protrusions are provided at positions symmetrical with respect to the rotation axis of the fixed magnetic pole, and one of the pair of permanent magnets provided on the rotor is provided. The structure is provided so as to be shifted in the rotation direction and close to the fixed magnetic pole.

  In other examples, since the shape of the fixed magnetic pole and the arrangement of the permanent magnets have a great influence on the torque, many improvements are made to the fixed magnetic pole and the permanent magnet.

  However, in many cases, the improvement of the fixed magnetic pole cannot increase the torque sufficiently to increase the processing cost of the fixed magnetic pole and the permanent magnet provided therewith. Further, in the improvement in which complicated irregularities are added to the fixed magnetic pole, the arrangement space of the fixed magnetic pole is often increased, and there is a problem that it is difficult to reduce the size.

JP 2004-172353 A

  In order to solve the above-described problems, an object of the present invention is to provide a rotary solenoid that is easy to downsize and has a structure suitable for obtaining high torque.

  The invention according to claim 1 is a shaft provided rotatably in the left and right, a coil bobbin provided integrally with the shaft, a coil formed by winding a metal wire, and a coil provided on the coil bobbin. In the rotary solenoid having the first permanent magnet and the second permanent magnet which are arranged in the vicinity of the coil bobbin and whose inner side surfaces face each other and whose magnetization directions are opposite to each other. The coil bobbin includes a first winding frame portion and a second winding frame portion arranged so that the first permanent magnet and the second permanent magnet are interposed therebetween, and The winding frame is fixed to a portion near the base end of the shaft, the second winding frame is fixed to a portion near the tip of the shaft, and the coil includes the first winding portion and the second winding. The first winding portion and the wire portion. The second winding part is formed in a substantially rectangular frame shape and is disposed on the side of the shaft, and the first winding part is provided so as to face the outer surface of the first permanent magnet. A first facing portion, a second facing portion provided to face the outer surface of the second permanent magnet, an upper end of the first facing portion, and an upper end of the second facing portion. A first continuous portion provided to be continuous with the second continuous portion, and a second continuous portion provided to be continuous with a lower end of the first opposing portion and a lower end of the second opposing portion, The second winding portion is provided so as to face a third facing portion provided to face the inner side surface of the first permanent magnet, and to an inner side surface of the second permanent magnet. A fourth facing portion, a third continuous portion provided to be continuous with an upper end of the third facing portion and an upper end of the fourth facing portion, 3 and a fourth continuous portion provided so as to be continuous with a lower end of the fourth opposing portion, and when the coil is energized, the first opposing portion and the third opposing portion are provided. The current flowing through the opposite portion of the first direction is a first direction, and the current flowing through the second opposite portion and the fourth opposite portion is a second direction opposite to the first direction. Is a rotary solenoid.

  According to a second aspect of the present invention, in the first aspect of the present invention, the coil bobbin is a part of the first winding frame portion that faces away from the first winding portion and the second winding portion. The rotary solenoid is characterized in that a recess for storing a part or all of the wiring or electronic component connected to the coil is provided.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the coil includes the first continuous portion, the second continuous portion, the third continuous portion, and the fourth continuous portion. The rotary solenoid is characterized in that, in the continuous portion, these central portions are formed in a flat plate shape, and part or all of the portions near the left and right ends are respectively curved toward the shaft. It is.

  The invention according to claim 4 is the rotary solenoid according to any one of claims 1 to 3, wherein the coil is formed by winding a rectangular wire. It is.

  The invention according to claim 5 is the invention according to claim 4, wherein the coil includes the first continuous portion, the second continuous portion, the third continuous portion, and the fourth continuous portion. The rotary solenoid is characterized in that a central portion is formed so that the rectangular wire is overlapped in the same direction as the axial direction of the shaft.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the coil bobbin includes the first winding portion and the third continuous portion of the coil bobbin. Four pasting surfaces for pasting the portions near the left and right ends of the continuous portion are provided, and the second winding frame portion has portions near the left and right ends of the second continuous portion and the fourth continuous portion of the coil. It is a rotary solenoid characterized in that it has four pasting surfaces to be pasted.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the coil bobbin is configured such that the first winding frame portion is the first continuous portion of the coil and the coil bobbin. A holding groove is provided to hold a portion near the center of the third continuous portion, and the second winding frame portion holds a portion near the center of the second continuous portion and the fourth continuous portion of the coil. A rotary solenoid having a holding groove.

  According to the first aspect of the present invention, the opposing portions of the coil are provided so as to oppose the inner surface and the outer surface of the first permanent magnet and the second permanent magnet. Lorentz force is applied to both the strip and the outer surface, and a larger torque can be obtained than the structure in which the strip is provided only on one of the side surfaces. Therefore, it becomes possible to reduce the size of the conventional rotary solenoid that exhibits the same degree of torque.

  According to the second aspect of the present invention, since part or all of the wiring or electronic parts related to the driving of the rotary solenoid is stored in the concave portion of the coil bobbin, the arrangement space that has been secured outside the rotary solenoid is reduced or Can be abolished.

  According to the third aspect of the present invention, the curved wire is obtained by bending a part of the filament constituting the coil on both the inner and outer surfaces of the first and second permanent magnets. Since the strip faces or approaches the first permanent magnet and the second permanent magnet, and the gap between the two becomes smaller, a larger Lorentz force can be obtained. Therefore, a larger torque can be obtained than a rotary solenoid of the same size according to the prior art. As a result, the rotary solenoid can be miniaturized.

  According to the invention described in claim 4, since the coil is formed by a rectangular wire, it is easy to form the first winding portion and the second winding portion in a substantially rectangular frame shape.

  According to the fifth aspect of the invention, the first continuous portion, the second continuous portion, the third continuous portion, and the portion near the center of the fourth continuous portion are rectangular wires in the same direction as the axial direction of the shaft. Since the filaments are superimposed, it is easy to form the first winding portion and the second winding portion in a substantially rectangular frame shape.

  According to the sixth aspect of the present invention, since the predetermined portions of the first winding portion and the second winding portion are attached to the four attachment surfaces, it is easy to provide the coil on the coil bobbin.

  According to the seventh aspect of the present invention, since the predetermined portions of the first winding portion and the second winding portion are held by the holding grooves, the coil can be held with respect to the coil bobbin while maintaining a predetermined shape. It becomes easy.

It is a perspective view which shows schematic structure of the rotary solenoid which concerns on embodiment of this invention. It is a disassembled perspective view of the rotary solenoid which concerns on embodiment of this invention. It is explanatory drawing of the rotary solenoid which concerns on embodiment of this invention, (a) is a top view, (b) is a front view. It is sectional explanatory drawing (1) of the rotary solenoid in a non-energized state, (a) is an AA sectional view, (b) is a BB sectional drawing. It is sectional explanatory drawing of the rotary solenoid rotated to the left to the maximum, (a) is an AA sectional view, (b) is a BB sectional drawing. It is sectional explanatory drawing of the rotary solenoid rotated to the right to the maximum, (a) is an AA sectional view, (b) is a BB sectional drawing. It is sectional explanatory drawing (2) of the rotary solenoid in a non-energized state, (a) is CC sectional view taken on the line, (b) is DD sectional view. It is a perspective view which shows the structure of the detail of a coil bobbin and a coil. It is a perspective view which shows the winding state of a coil. It is a perspective view which shows the electricity supply direction of a coil. It is a perspective view which shows the accommodation state of the flexible printed circuit board to a coil bobbin. It is a perspective view which shows the modification of a support body.

  Hereinafter, a rotary solenoid according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is an exploded perspective view of the rotary solenoid according to the embodiment of the present invention. In FIG. 2, 10 is a rotary solenoid, 20 is a coil, 21a, 21b, 22a and 22b are facing parts, 23a, 23b, 24a and 24b are continuous parts, 30 is an upper reel part, 31a, 31b, 32a and 32b are Affixing surface, 34 is a through-hole, 35 is a disc part, 37 is a holding groove, 40 is a lower winding frame part, 41a, 41b, 42a and 42b are affixing surfaces, 44 is a screw hole, 47 is a holding groove, 60 is the first 1 shaft structure, 61 is a thread groove forming part, 62 is a step part, 63a, 63b, 64a and 64b are surface cut parts, 65 is a step part, 66 is an insertion part, 67 is a thread groove forming part, and 68 is a second part. The shaft structure 69 is a screw hole, 70 is a step, 71 is a case, 72 is an opening, 73 is a nut, 74 is a dry bearing, 75 is an internal fixed magnetic pole, 76 is an upper step, 77 is a through hole, 78a and 78b Vertical groove, 79 is a middle step, 80 is a lower step, 81a and 81 are notches, 82 is an opening, 83 is a permanent magnet, 83a is an outer surface, 83b is an inner surface, 84 is a permanent magnet, 84a is an outer surface, 84b Is an inner surface, 85 is a ball bearing, 86 is a stopper, 87a and 87b are contact surfaces, 88 is a dowel-shaped projection, 89 is a spacer, 90 is a base, 91 is an opening, 92a and 92b are horizontal grooves, 93a and 93b Is a screw hole, 94 is a support, 95a and 95b are permanent magnet holders, 96 is a leg, 97 is a support, 98a and 98b are permanent magnet holders, 99 are legs, 100 and 101 are protrusions, 102 Is a screw. FIG. 3 is an explanatory view of the rotary solenoid according to the embodiment of the present invention, in which (a) is a plan view and (b) is a front view. The reference numerals used in FIG. 3 are the same as those in FIG. In addition, about the coil 20, in each drawing including FIG. 2 (except for the partially enlarged view of FIG. 9), description of a fine aspect in which the filament is repeatedly wound is omitted, and is expressed by a general appearance shape. doing. Further, description of the first shaft constituting body 60 and the thread groove of the screw 102 is also omitted.

  As shown in FIG. 2, the rotary solenoid 10 is housed in a case 71 whose internal structure is substantially cylindrical. As shown in FIG. 3A, the case 71 has an open structure in which an end cap is not provided in the opening 72 on the upper surface in order to improve heat dissipation. Accordingly, the upper reel portion 30 and the like are exposed on the upper surface of the rotary solenoid 10. Further, as shown in FIG. 2, the internal structure of the rotary solenoid 10 includes, as rotating components, an upper reel portion 30 and a lower reel portion 40 that constitute a coil bobbin, a coil 20, a first shaft constituting body 60, and a first shaft constituting body 60. A shaft composed of a two-shaft structure 68 is provided. Further, as a fixed component that generates a rotational force or supports a rotating object, an internal fixed magnetic pole 75, permanent magnets 83 and 84, supports 94 and 97, dry bearing 74, ball bearing 85, stopper 86, etc. It has. Note that the rotary solenoid 10 may have a dustproof structure by providing an end cap in the opening 72.

  First, the rotating components of the rotary solenoid 10 will be described. The first shaft constituting body 60 has a portion closer to the top tip having a smaller diameter than the central portion, and a screw groove is formed as a screw groove forming portion 61. Further, the boundary portion between the small diameter portion and the central portion is a stepped portion 62 for sandwiching the upper winding frame portion 30. Further, in order to prevent the coil bobbin 11 from spinning freely, surface cut portions 63a and 63b are formed in a portion below the stepped portion 62. Further, the lower portion of the first shaft constituting body 60 forms an insertion portion 66 having a smaller diameter than that of the center portion for insertion into the lower winding frame portion 40. Further, the front end portion is a thread groove forming portion 67 having a smaller diameter than the insertion portion 66 in order to be screwed into the second shaft constituting body 68. A boundary portion between the center portion and the insertion portion 66 is a stepped portion 65 for sandwiching the lower winding frame portion 40. In addition, surface cut portions 64 a and 64 b are formed on the upper portion from the stepped portion 65 in order to prevent the coil bobbin 11 from spinning freely. In addition, although the surface cut of the 1st shaft structure 60 cuts two surfaces each on the upper and lower sides, you may cut one surface or 3 surfaces or more, respectively.

  The second shaft constituting body 68 has a screw hole 69 formed on the upper portion thereof so as to be screwed with the thread groove forming portion 67 of the first shaft constituting body 60. Further, the upper portion has a smaller diameter than the lower portion, and the boundary portion is a stepped portion 70. The stepped portion 70 is in pressure contact with the inner ring of the ball bearing 85 fitted to the lower stepped portion 80 of the internal fixed magnetic pole 75, thereby preventing the second shaft constituting body 68 from slipping into the case 71.

  FIG. 8 is a perspective view showing a detailed configuration of the coil bobbin and the coil. In FIG. 8, 11 is a coil bobbin, 13 is a first winding portion, 14 is a second winding portion, 25a, 25b, 26a and 26b are external connection portions, 27a, 27b, 27c, 27d, 28a, 28b, 28c and 28d is a bending start portion, 33a, 33b, 36a and 36b are arm portions, 38 is a flat plate portion, 39a and 39b are storage recesses, 45 is a face cut hole, 43a, 43b, 46a and 46b are arm portions, and 48 is a flat plate portion. , 49a and 49b are storage recesses, 55 is an insertion portion, and other reference numerals are the same as those in FIG. FIG. 9 is a perspective view showing a winding state of the coil. In FIG. 9, 29a is a long side surface, 29b is a short side surface, and the other code | symbol shows the same thing as FIG.

  As shown in FIG. 8, the coil bobbin 11 of the rotary solenoid 10 is composed of an upper winding frame portion 30 and a lower winding frame portion 40, and as will be described later, a first shaft constituting body 60 and a second shaft constituting body 68. And so on.

  The upper winding frame portion 30 is provided with a disc portion 35 around the through hole 34 through which the thread groove forming portion 61 of the first shaft constituting body 60 passes, and an arm extending in a substantially L shape from the disc portion 35. The portions 33a and 36a and the arm portions 33b and 36b extending in a substantially inverted L shape are provided. The through hole 34 forms a surface cut corresponding to the surface cut portions 63a and 63b of the first shaft component 60, and the direction of the surface cut between the first shaft component 60 and the through hole 34 matches. You can't insert it without it. The arm portions 33a and 36a and the arm portions 33b and 36b pass through the center of the through hole 34 and are symmetrical with respect to a plane orthogonal to the holding groove 37, that is, have a structure that is a mirror image of each other. Adhering surfaces 31a and 31b for adhering the coil 20 to a part far from the through hole 34 are formed, and adhering surfaces 32a and 32b are formed in the part closer to the through hole 34 for the same purpose. Note that the pasting surfaces 31a, 31b, 32a, and 32b are not flat surfaces but are pasted on curved portions of the coil 20, as will be described later. It has become. Further, the center of the surface of the upper winding frame 30 on the side where the coil 20 is provided is provided so that a flat flat plate part 38 hangs down, and a holding groove 37 is formed inside thereof.

  At the center of the lower winding frame portion 40, a screw hole 44 and a surface cut hole 45 corresponding to the surface cut portions 64a and 64b of the first shaft constituting body 60 are integrally formed. Further, as will be described later, when the rotary solenoid 10 is assembled, the first shaft constituting body 60 is provided through these holes. Arm portions 43a and 46a that extend in a substantially L shape from portions around these holes and arm portions 43b and 46b that extend in a substantially inverted L shape are provided. The arm portions 43a and 46a and the arm portions 43b and 46b pass through the center of the screw hole 44 and are symmetrical with respect to a plane orthogonal to the holding groove 47, that is, have a structure that is a mirror image of each other. Adhering surfaces 41a and 41b for adhering the coil 20 are formed at sites far from the screw holes 44, and adhering surfaces 42a and 42b are formed at sites closer to the screw holes 44 for the same purpose. The pasting surfaces 41a, 41b, 42a, and 42b are curved surfaces according to the curved portion of the coil 20 for the same reason as the pasting surface 31a. Further, the center of the surface on the side where the coil 20 of the lower winding frame portion 40 is provided is provided so that a flat flat plate portion 48 stands upright, and a holding groove 47 is formed inside thereof. The insertion portion 55 is inserted on the inner peripheral surface side of the middle step portion 79 of the internal fixed magnetic pole 75.

  The coil 20 includes two winding portions, a first winding portion 13 and a second winding portion 14. Both the first winding portion 13 and the second winding portion 14 are formed in a substantially rectangular frame shape. Further, the first winding portion 13 is formed to be slightly wider than the second winding portion 14 in terms of the distance and arrangement with respect to the permanent magnets 83 and 84. Further, the first winding portion 13 and the second winding portion 14 are very close to the side of the shaft formed by the first winding portion 13 and the second winding portion 14 in order to facilitate the mounting of the coil 20. It has been placed in the state. Therefore, when these winding portions are viewed from the shaft side, the first winding portion 13 and the second winding portion 14 appear to substantially overlap. In a general rotary solenoid, a coil is provided so as to surround the shaft or sandwich from the left and right, and the arrangement of the coil 20 can be said to be a major feature of the rotary solenoid 10.

  The first winding part 13 and the second winding part 14 are not formed by winding them directly around the coil bobbin 11, but after winding a copper wire, also called a coil wire, in a substantially rectangular frame shape by a winding machine in advance. The portions from the bending start point portions 27a, 27b, 28a and 28b to the left and right ends are formed by bending to the shaft side. In addition, at the time of a bending process, it bends according to the upper reel part 30 and the lower reel part 40. Accordingly, the portions from the bending starting point portions 27a, 27b, 28a or 28b to the left and right ends are almost directly opposed to the permanent magnet 83 or the permanent magnet 84, so that the Lorentz force for rotating the coil 20 can be most efficiently obtained. Can do. Further, since the gap between the two is substantially constant, there is an advantage that the torque obtained during the rotation of the coil 20 is substantially constant. By the way, as shown in the partial enlarged view of the lower part of FIG. 9, in this embodiment, the short side surface 29b of the rectangular wire is oriented in the coil bobbin direction and the long side surface 29a is oriented in the vertical direction. It is wound on a volume. By winding the rectangular wire in this way, the shape after bending is well maintained, and the arrangement of the wire hardly breaks at the bending start points 27a, 27b, 28a and 28b. Further, since the space factor is higher than that of the round wire, there is an advantage that a space necessary for arranging the coils can be reduced and heat dissipation is better than that of the round wire.

  Further, the right vertical portion of the first winding portion 13 is a facing portion 21a, the left vertical portion is a facing portion 21b, the upper horizontal portion is a continuous portion 23a, and the lower horizontal portion is a continuous portion 23b. Therefore, when viewed from the plane (upper surface) of the coil 20, the central portions of the continuous portions 23a and 23b appear to extend linearly toward the left and right. Similarly, the portions near the left and right ends of these continuous portions and the facing portions 21 a and 21 b appear to be gently curved so as to draw a substantially concentric curved surface with the inner peripheral surface of the case 71. The facing portions 21 a and 21 b of the first winding portion 13 are provided so as to face the outer surface 83 a of the permanent magnet 83 and the outer surface 84 a of the permanent magnet 84 with a slight gap. Therefore, when the coil 20 is energized, a Lorentz force is generated between the facing portions 21a and 21b and the permanent magnets 83 and 84, and the coil 20 is rotated to the left or right. The continuous portions 23a and 23b serve as a current flow path when the coil 20 is energized, and do not provide a force for rotating the coil 20 unlike the facing portions 21a and 21b. Therefore, the portion near the center is formed in a flat plate shape so that the current path length between the facing portion 21a and the facing portion 21b is made as short as possible to reduce power loss.

  Similarly to the first winding part 13, the second winding part 14 has the right vertical part as the facing part 22 a, the left vertical part as the facing part 22 b, the upper horizontal part as the continuous part 24 a, and the lower horizontal part as the lower part. The continuous portion 24b is used. Therefore, when viewed from the plane (upper surface) of the coil 20, the central portions of the continuous portions 24a and 24b appear to extend linearly toward the left and right. Similarly, the portions near the left and right ends of these continuous portions and the facing portions 22 a and 22 b appear to be gently curved so as to draw a substantially concentric curved surface with the inner peripheral surface of the case 71. Similarly to the first winding part 13, the opposing parts 22a and 22b have a flat plate-like portion near the center so that the current path length between the opposing part 22a and the opposing part 22b is as much as possible. It is shortened to reduce power loss. Further, the facing portions 22 a and 22 b of the second winding portion 14 are provided so as to face the outer surface 83 a of the permanent magnet 84 and the outer surface 84 a of the permanent magnet 84 with a slight gap.

  FIG. 10 is a perspective view showing the energization direction of the coil. 10, 51a, 51b, 52a and 52b are directions of current, 53a and 53b are directions of rotation, and the other symbols are the same as those in FIG.

  The external connection portions 25a and 25b of the first winding portion 13 and the external connection portions 26a and 26b of the second winding portion 14 shown in FIG. 9 are respectively connected to terminals of the flexible printed circuit board as will be described later. And is connected to a power supply external to the rotary solenoid 10 through this substrate. Note that one of the external connection portions 25a and 25b and one of the external connection portions 26a and 26b may be connected to form the first winding portion 13 and the second winding portion 14 as one winding. The current may be separately supplied to these windings, and one of them may be turned on, or both may be turned on so that two stages of torque can be obtained. Furthermore, if the first winding part 13 and the second winding part 14 have different numbers of turns, three stages of torque can be obtained. However, as shown in the current directions 51a, 51b, 52a and 52b in FIG. 10, the currents flowing through the first winding portion 13 and the second winding portion 14 are the permanent magnet 83 side and the permanent magnet 84 side. The outer surface 83a of the permanent magnet 83 and the inner side surface 83b of the permanent magnet 83 and the outer surface 84a of the permanent magnet 84 and the inner side surface 84b thereof are in the same direction. By flowing the current in this way, a Lorentz force that rotates the facing portions 21a, 21b, 22a, and 22b in the rotation direction 53a or 53b is generated. The rotation direction can be set as appropriate depending on the magnetization direction of the permanent magnet 83 and the permanent magnet 84. If the directions of the currents are reversed, a Lorentz force that rotates in the opposite direction works.

  Returning to FIG. 8, a method of mounting the coil 20 on the coil bobbin 11 will be described. After bending the first winding portion 13 and the second winding portion 14, both ends of the continuous portion 23 a of the first winding portion 13 are attached to the pasting surfaces 31 a and 31 b of the upper winding frame portion 30, and the continuous portion 23 b Both end portions are attached to the attaching surfaces 42a and 42b of the lower winding frame portion 40 with an adhesive. At the same time, both ends of the continuous part 24a of the second winding part 14 are bonded to the bonding surfaces 31a and 31b of the upper winding frame part 30, and both ends of the continuous part 24b are bonded to the bonding surfaces 42a and 42b of the lower winding frame part 40. Paste with. When the continuous portions are pasted in this way, the continuous portion 23a and the continuous portion 24a are held in a state of being lightly sandwiched between the holding grooves 37 of the upper winding frame portion 30, and the continuous portion 23b and the continuous portion 24b are lower wound. It is held in a state of being lightly sandwiched between the holding grooves 47 of the frame portion 40. Therefore. Since the first winding portion 13 and the second winding portion 14 are respectively attached at four places and are held by the holding grooves 37 and the holding grooves 47, the shape is kept constant even after long-term use. Be drunk.

  When the diameter of the case 71 is considerably large, even if the first winding portion 13 and the second winding portion 14 are formed by round wire strips, the wire strips at the curve starting point portions 27a, 27b, 28a, and 28b. In such a case, it may be formed with a round wire. In addition, when the battery has a long and thin outer shape like a dry battery, the length of the continuous portions 23a, 23b, 24a and 24b is relatively short, so that the entire continuous portions 23a, 23b, 24a and 24b are on the inner peripheral surface of the case 71. It may be bent together. Further, in this case, the holding grooves 37 and the holding grooves 47 may not be provided, and the continuous portions 23 a, 23 b, 24 a and 24 b may be attached to the outer surfaces of the flat plate portion 38 and the flat plate portion 48.

  FIG. 11 is a perspective view showing a state in which the flexible printed board is stored in the coil bobbin. In FIG. 11, 50 and 50a are flexible printed circuit boards, 54 is a storage space, and other symbols are the same as those in FIG.

  In this embodiment, since the first winding portion 13 and the second winding portion 14 constituting the coil 20 are provided on the flat plate portion 38 side of the upper winding frame portion 30, the portion opposite to the flat plate portion 38. Does not constitute the coil 20. Therefore, storage recesses 39a and 39b are formed in this portion to form a storage space 54 so that the flexible printed board 50 can be stored in a bent state. That is, one end of the flexible printed circuit board 50 is attached to the housing recess 39a, and terminals not shown are connected to the external connection portions 25a and 25b and 26a and 26b. Further, the end side of the flexible printed circuit board 50 is bent and stored in a substantially U-shape in the storage recess 39a. Further, the other end of the flexible printed circuit board 50 is connected to a wiring drawn out of the case 71 (not shown), and is attached to the case 71 while being bent in a substantially U shape. In this way, even if the upper reel portion 30 rotates, no stress such as tensile stress is applied to the end portion as shown in the flexible printed circuit board 50a. Further, the other end portion is also bent in a substantially U shape, and the storage concave portion 39b for storing the bent portion is provided, so that no stress is applied thereto. The storage space 54 may store a device such as a magnetic sensor, or may store other devices. The lower winding frame portion 40 is also provided with storage recesses 49a and 49b, and can be stored here if it has a size that does not interfere with the stopper 86 such as wiring.

  Further, the rotating components of the rotary solenoid 10 will be described. FIGS. 7A and 7B are cross-sectional explanatory views (2) of the rotary solenoid in a non-energized state, where FIG. 7A is a cross-sectional view taken along the line CC and FIG. 7B is a cross-sectional view taken along the line DD. The reference numerals used in FIG. 7 are the same as those in FIG. Note that hatching of the cross section is omitted.

  As shown in FIGS. 7A and 7B, the upper winding frame portion 30 and the lower winding frame portion 40 constituting the coil bobbin 11 are fixed to the first shaft constituting body 60. That is, the upper reel portion 30 is screwed with the nut 73 in a state where the thread groove forming portion 61 of the first shaft constituting body 60 is inserted into the through hole 34 of FIG. Therefore, the disc part 35 is sandwiched between the step part 62 and the nut 73 of the first shaft constituting body 60. In the state where the insertion portion 66 is inserted into the screw hole 44 shown in FIG. 2, the lower reel frame portion 40 is screwed into the screw hole 69 of the second shaft constituting body 68 to form the first shaft structure. The body 60 is pulled by the second shaft constituting body 68 so that the peripheral portion of the screw hole 44 is in pressure contact with the spacer 89. Therefore, the lower reel portion 40 is sandwiched between the step portion 65 and the spacer 89 of the first shaft constituting body 60 shown in FIG.

  Further, the first shaft constituting body 60 is formed with surface cut portions 63a and 63b on the upper side and surface cut portions 64a and 64b on the lower side, and in the state where the rotary solenoid 10 is assembled, The through hole 34 of the part 30 and the surface cut hole 45 of the lower winding frame part 40 are in contact with each other. Therefore, the first shaft constituting body 60 and the second shaft constituting body 68 screwed to the first shaft constituting body 60 do not idle with respect to the through hole 34 and the lower winding frame portion 40 of the upper winding frame portion 30. As described above, since the shaft is constituted by the first shaft constituting body 60 and the second shaft constituting body 68, when the two shaft constituting bodies are screwed together, the coil bobbin 11 is moved to the two shafts by the step of the shaft or the like. It can be firmly fixed to the structure.

  Next, the fixed components of the rotary solenoid 10 will be described. As shown in FIG. 2, the internal fixed magnetic pole 75 includes an upper step portion 76, a middle step portion 79, and a lower step portion 80. The upper stage portion 76 is formed in a substantially cylindrical shape, and a through hole 77 is formed at the center for fitting the dry bearing 74. In addition, longitudinal grooves 78a and 78b for fitting the protruding portions 100 and 101 of the supports 94 and 97 are formed on the peripheral side surfaces facing each other. The middle stage portion 79 is formed in a substantially semi-cylindrical shape, and is held in a state of being rotatable to the left and right with the insertion portion 55 of the lower winding frame portion 40 being inserted on the inner peripheral surface side. Note that the width of the middle step 79 is set in consideration of the rotation angle of the lower reel portion 40. The lower stage 80 has an opening 82 formed in the center and is fitted to the base 90. A ball bearing 85 is fitted in the opening 82. Further, notches 81 a and 81 b are formed on the peripheral side portion of the lower step portion 80 in order to match the fitting direction with the base 90. As described above, in the internal fixed magnetic pole 75, the upper step portion 76 provided with the dry bearing 74 and the lower step portion 80 provided with the ball bearing 85 are integrated via the middle step portion 79. It is very easy to align (center) the center axis (position) of 85.

  The base 90 is a fixed member for fixing the internal fixed magnetic pole 75 and is also a fixed magnetic pole for configuring a magnetic circuit. An opening 91 is formed at the center, and is fitted into the lower opening of the case 71. In addition, the lower portion 80 of the internal fixed magnetic pole 75 is fitted into the opening 91. Further, horizontal grooves 92a and 92b are formed on the upper surface in order to match the direction in which the internal fixed magnetic pole 75 is fitted. That is, when the internal fixed magnetic pole 75 is fitted, the orientation of the cutout 81a and the cutout 81b is matched with the horizontal groove 92a and the horizontal groove 92b, respectively, so that the fitting can be performed correctly. In addition, screw holes 93 a and 93 b are formed in the horizontal grooves 92 a and 92 b for screwing the legs 96 of the support 94 and the legs 99 of the support 97 with screws 102.

  The ball bearing 85 is fitted to the lower step portion 80 of the internal fixed magnetic pole 75, and the second shaft constituting body 68 is fitted to the inner ring. Therefore, the first shaft constituting body 60 and the second shaft constituting body 68 are supported by the ball bearings 85 so as to be rotatable left and right. A needle bearing may be provided instead of the ball bearing. The spacer 89 is screwed onto the upper portion of the first shaft constituting body 60 and the second shaft constituting body 68 so that the lower end portion is in pressure contact with the ball bearing 85 and the upper end portion is in pressure contact with the insertion portion 55 shown in FIG. ing. As a result, as shown in FIG. 7B, the upper end portion of the spacer 89, the step portion 65 of the first shaft constituting body 60, and the insertion portion 55 are sandwiched.

  The permanent magnet 83 and the permanent magnet 84 are formed in a substantially arc plate shape, and their magnetization directions are reversed. That is, the permanent magnet 83 is magnetized so that the outer side surface 83a is on the S pole side and the inner side surface 83b is on the N pole side. The permanent magnet 84 is magnetized on the outer side surface 84a on the N pole side and the inner side surface 84b on the S pole side. It is magnetized so that By magnetizing in this way, when a current in the direction shown in FIG. 10 is passed through the coil 20, the coil 20 is placed between the permanent magnet 83 and the permanent magnet 84 and the opposing portions 21a, 21b, 22a and 22b. Generate Lorentz force that rotates in the same direction. In addition, it is desirable that the magnetization directions of the permanent magnet 83 and the permanent magnet 84 are directions extending radially from the center of curvature of the respective outer surface or inner surface or converge to the center of curvature.

  The supports 94 and 97 have a function of supporting the permanent magnet 83 and the permanent magnet 84. That is, the support body 94 is positioned at the vertical groove 78a and the notch 81a of the base 90, and the protrusion 100 is fitted into the vertical groove 78a, and is fixed to the base 90 by the screw 102 in addition. Yes. The support body 97 has a leg portion 99 positioned by the vertical groove 78b and the notch 81b of the internal fixed magnetic pole 75, and a protruding portion 101 is fitted in the vertical groove 78b, and is fixed to the base 90 by a screw 102 in addition. Yes. The permanent magnet holding part 95a and the permanent magnet holding part 95b are in contact with the permanent magnet 83 and the permanent magnet 84, respectively. 84. The contacting parts are bonded to each other with an adhesive.

  Further, modifications of the supports 94 and 97 will be described. FIG. 12 is a perspective view showing a modification of the support. In FIG. 12, reference numeral 103 denotes a screw hole, and other reference numerals are the same as those in FIG. The support members 94 and 97 of this modification omit the legs. That is, the screw hole 103 is formed in the vertical groove 78a of the internal fixed magnetic pole 75, and the screw hole (not shown) is also provided in the vertical groove 78b. In addition, the support body 94 and the support body 97 are also provided with screw holes (not shown) penetrating the protrusions 100 and 101, respectively. Then, in a state where the protruding portion 100 is fitted in the vertical groove 78a and the protruding portion 101 is fitted in the vertical groove 78a, the screw 102 is screwed from the outer surface side of the support body 94 and the support body 97, and the support body 94 and 97 is fixed to the internal fixed magnetic pole 75. Therefore, the supports 94 and 97 can be firmly fixed even if the legs are omitted.

  The stopper 86 has a function of restricting the rotation of the coil bobbin 11. That is, when the lower winding frame portion 40 rotates counterclockwise by a certain angle, the arm portion 43a of the lower winding frame portion 40 comes into contact with the contact surface 87a of the stopper 86 and the rotation stops. Further, when the lower winding frame portion 40 rotates to the right by a certain angle, the arm portion 43b of the lower winding frame portion 40 comes into contact with the contact surface 87b of the stopper 86 and the rotation stops. The stopper 86 has an upper dowel-shaped projection 88 fitted in a not-shown concave portion of the support 94 and is fixed at a predetermined position, so that the stopper 86 is displaced by contact with the lower winding frame portion 40. There is nothing. The dry bearing 74 is a bearing that supports the first shaft constituting body 60 and is fitted to the upper step 76 of the internal fixed magnetic pole 75. The coil 20 is arranged in one direction when viewed from the shaft 12, and the centrifugal force of the coil 20 is always applied to the shaft 12 from one direction during the rotation of the coil 20. Accordingly, during rotation, a stress that causes the shaft 12 to swing (swing) is always applied. However, since the dry bearing 74 is provided, the shaft 12 does not rotate while swinging.

  Next, the operation of the rotary solenoid 10 according to this embodiment will be described. FIG. 1 is a perspective view showing a schematic structure of a rotary solenoid according to an embodiment of the present invention. 4A and 4B are cross-sectional explanatory views (1) of the rotary solenoid in a non-energized state, where FIG. 4A is a cross-sectional view taken along the line AA, and FIG. 4B is a cross-sectional view taken along the line BB. 5A and 5B are cross-sectional explanatory views of the rotary solenoid rotated to the left as much as possible. FIG. 5A is a cross-sectional view taken along line AA, and FIG. 5B is a cross-sectional view taken along line BB. 6A and 6B are cross-sectional explanatory views of the rotary solenoid rotated to the right as much as possible, where FIG. 6A is a cross-sectional view taken along line AA, and FIG. 6B is a cross-sectional view taken along line BB. The reference numerals used in FIGS. 1, 4, 5 and 6 are the same as those in FIG.

  First, as shown in FIGS. 1 and 4, when the coil 20 is not energized, the facing portion 21a and the facing portion 22a, and the facing portion 21b and the facing portion 22b of the coil 20 are respectively a permanent magnet 83 and a permanent magnet. It is assumed that it is in the vicinity of the center with the magnet 84. Here, when the coil 20 is energized, as shown in the current directions 51a, 51b, 52a and 52b in FIG. Also, a magnetic circuit is generated around the permanent magnets 83 and 84, the internal fixed magnetic pole 75, the base 90, and the case 71.

  Then, the force in the direction in which the right-handed screw advances with respect to the current flowing through the facing portion 21a and the facing portion 22a, and the facing portion 21b and the facing portion 22b, that is, the Lorentz force that tries to move the flow of charged particles, Is moved in the direction of the rotation direction 53a of FIG. Then. As the coil 20 rotates, the coil bobbin 11, the first shaft component 60, and the second shaft component 68 also rotate. And when it rotates to the position shown in FIG. 5, the arm part 43a of the lower winding frame part 40 will contact | abut to the contact surface 87a of the stopper 86, and will stop.

  In a state where the rotation is stopped, this time, when a current is passed in the direction opposite to that in FIG. 10, the facing portion 21a and the facing portion 22a, and the facing portion 21b and the facing portion 22b are moved in the direction of the rotation direction 53b. Then. As the coil 20 rotates, the coil bobbin 11 and the like also rotate in the reverse direction. Then, when the coil bobbin 11 or the like rotates reversely as shown in FIG. 6, the arm portion 43 b of the lower winding frame portion 40 comes into contact with the contact surface 87 b of the stopper 86 and stops.

  In addition, when rotating the coil bobbin 11 etc. reversely, you may employ | adopt means other than the means to send an electric current to a reverse direction. For example, the coil bobbin 11 or the like may be provided in a state of being reversely rotated by mechanical means such as a helical spring provided inside or outside the case 71. In this way, when the coil bobbin 11 or the like is rotated to a predetermined angle and the energization to the coil 20 is stopped, the coil bobbin 11 or the like returns to the original angle by the action of a means such as a helical spring. .

  As described above, in the rotary solenoid 10 according to this embodiment, the facing portion 21a and the facing portion 22a of the coil 20 are connected to the outer surface 83a and the inner surface 83b of the permanent magnet 83, and the facing portion 21b and the facing portion 22b. Are positioned so as to sandwich the outer side surface 84a and the inner side surface 84b of the permanent magnet 84, and in this state, by passing a current through the coil 20, both the outer side surface side and the inner side surface side of the permanent magnets 83 and 84 are provided. Since the Lorentz force acts on the coil, a gap (air gap) is provided in a part of the magnetic circuit, and the efficiency is higher than that of a rotary solenoid that rotates to fill the gap when energized. As a result, size reduction becomes easier than such a rotary solenoid. In addition, since the first winding portion 13 and the second winding portion 14 are provided on the sides of the first shaft constituting body 60 and the second shaft constituting body 68 and very close to each other, the formation of the coil 20 is achieved. It becomes easy. Furthermore, the mounting to the coil bobbin 11 is facilitated. Moreover, since the shaft is composed of the first shaft constituting body 60 and the second shaft constituting body 68, it is very easy to fix the coil bobbin 11 to the shaft. Further, the shaft is constituted by the first shaft constituting body 60 and the second shaft constituting body 68, and when the two shaft constituting bodies are screwed together, the coil bobbin 11 is fixed to the two shaft constituting bodies by a step of the shaft or the like. Since it was made to do, it is not necessary to provide a fixing means separately. Furthermore, the degree of freedom in the assembly procedure of the rotary solenoid 10 is increased, and the assembly is facilitated. In addition, the space on the side opposite to the side on which the coil 20 is disposed of the upper reel portion 30 is used as a storage space 54 so that the flexible printed circuit board 50 can be stored. Storage of related items becomes very easy. Further, for example, a device such as a magnetic sensor can be accommodated.

  The present invention is not limited to the contents described above, and the details of the shape of the coil bobbin, the coil, or the support, the assembly order of the coil, the coil bobbin, and the shaft, and the like are the ranges described in the claims. Various modifications can be made without departing from the above.

DESCRIPTION OF SYMBOLS 10 Rotary solenoid 11 Coil bobbin 13 1st winding part 14 2nd winding part 20 Coil 21a Opposing part 21b Opposing part 22a Opposing part 22b Opposing part 23a Continuous part 23b Continuous part 24a Continuous part 24b Continuous part 25a External connection part 25b External connection Part 26a external connection part 26b external connection part 27a curve starting point part 27b curve starting point part 27c curve starting point part 27d curve starting point part 28a curve starting point part 28b curve starting point part 28c curve starting point part 28d curve starting point part 29a long side face 29b short side face 30 Upper reel portion 31a Attaching surface 31b Attaching surface 32a Attaching surface 32b Attaching surface 33a Arm portion 33b Arm portion 34 Through hole 35 Disc portion 36a Arm portion 36b Arm portion 37 Holding groove 38 Flat plate portion 39a Storage recess 39b Storage recess 40 Lower winding Frame 41a Affixing surface 41b Affixing surface 42a Affixing surface 42b Affixing surface 43a Arm 43 Arm portion 44 Screw hole 45 Surface cut hole 46a Arm portion 46b Arm portion 47 Holding groove 48 Flat plate portion 49a Storage recess 49b Storage recess 50 Flexible printed circuit board 50a Flexible printed circuit board 51a Current direction 51b Current direction 52a Current direction 52b Current direction Direction 53a Rotation direction 53b Rotation direction 54 Storage space 55 Insertion portion 60 First shaft structure 61 Thread groove formation portion 62 Step portion 63a Surface cut portion 63b Surface cut portion 64a Surface cut portion 64b Surface cut portion 65 Step portion 66 Insertion portion 67 Screw groove forming portion 68 Second shaft constituting body 69 Screw hole 70 Step portion 71 Case 72 Opening portion 73 Nut 74 Dry bearing 75 Internal fixed magnetic pole 76 Upper step portion 77 Through hole 78a Vertical groove 78b Vertical groove 79 Middle step portion 80 Lower step portion 81a Notch 81b Notch 82 Opening 83 Permanent magnet 83a Outside Surface 83b Inner side surface 84 Permanent magnet 84a Outer side surface 84b Inner side surface 85 Ball bearing 86 Stopper 87a Contact surface 87b Contact surface 88 Dowel-shaped projection 89 Spacer 90 Base 91 Opening 92a Horizontal groove 92b Horizontal groove 93a Screw hole 93b Screw hole 94 Support 95a Permanent magnet holder 95b Permanent magnet holder 96 Leg 97 Support 98a Permanent magnet holder 98b Permanent magnet holder 99 Leg 100 Projection 101 Projection 102 Screw 103 Screw hole

Claims (7)

A shaft that is freely rotatable to the left and right;
A coil bobbin provided integrally with the shaft;
A coil formed by winding a metal wire, and provided in the coil bobbin;
In the rotary solenoid having the first permanent magnet and the second permanent magnet which are arranged in the vicinity of the coil bobbin, and whose inner side surfaces are opposed to each other and whose magnetization directions are opposite to each other,
The coil bobbin includes a first winding frame portion and a second winding frame portion arranged so that the first permanent magnet and the second permanent magnet are interposed therebetween, and the first winding The frame portion is fixed to a portion near the base end of the shaft, and the second winding frame portion is fixed to a portion near the tip end of the shaft,
The coil includes a first winding portion and a second winding portion, and the first winding portion and the second winding portion are formed in a substantially rectangular frame shape, and the side of the shaft. The first winding portion is arranged to face the outer surface of the first permanent magnet, and the first facing portion provided to face the outer surface of the first permanent magnet and the outer surface of the second permanent magnet. A second opposing portion provided on the first opposing portion; an upper end of the first opposing portion; and a first continuous portion provided to be continuous with an upper end of the second opposing portion; and the first opposing portion And a second continuous portion provided so as to be continuous with a lower end of the second facing portion, and the second winding portion faces an inner surface of the first permanent magnet. A third opposing portion provided in this manner, a fourth opposing portion provided so as to oppose the inner surface of the second permanent magnet, and an upper end of the third opposing portion A third continuous portion provided to be continuous with an upper end of the fourth opposing portion, a lower end of the third opposing portion, and a lower end of the fourth opposing portion. A current flowing in the first facing portion and the third facing portion in a first direction when the coil is energized, and the second facing portion and the second facing portion. The rotary solenoid is characterized in that the current flowing through the four opposing portions is in a second direction opposite to the first direction.   The coil bobbin has a part or all of wiring or electronic components connected to the coil in a portion facing away from the first winding portion and the second winding portion in the first winding frame portion. The rotary solenoid according to claim 1, wherein a recessed portion is provided.   In the first continuous portion, the second continuous portion, the third continuous portion, and the fourth continuous portion, the coil is formed in a plate-like portion near the left and right ends. The rotary solenoid according to claim 1 or 2, wherein a part or all of the portion is formed so as to be curved toward the shaft.   The rotary solenoid according to any one of claims 1 to 3, wherein the coil is formed by winding a rectangular wire.   In the coil, a portion near the center of the first continuous portion, the second continuous portion, the third continuous portion, and the fourth continuous portion has the same rectangular wire as the axial direction of the shaft. The rotary solenoid according to claim 4, wherein the rotary solenoid is formed so as to overlap in a direction.   The coil bobbin includes four sticking surfaces on which the first winding frame part sticks the first continuous part and the portions near the left and right ends of the third continuous part, and the second winding frame part has 6. The apparatus according to claim 1, further comprising four pasting surfaces for pasting portions of the second continuous portion and the fourth continuous portion near the left and right ends of the coil, respectively. The rotary solenoid according to item.   The coil bobbin includes a holding groove in which the first winding frame portion holds a portion near the center of the first continuous portion and the third continuous portion of the coil, and the second winding frame portion is The rotary according to any one of claims 1 to 6, further comprising a holding groove that holds a portion near the center of the second continuous portion and the fourth continuous portion of the coil. solenoid.

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