JP2005152855A - Vibration generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration generator that never troubles the vibration of a movable element although an elastic support member swingably supporting the movable element is disposed closer to the side of the movable element. <P>SOLUTION: The vibration generator 1 is provided with the movable element 50 on which a permanent magnet is mounted, a stator 10 for forming a magnetic path between the element 50 and the same by exciting a mounted coil by allowing current to flow in it, and the elastic support member 80, which keeps one wire disposed along the side 50a of the element 50 and is bent towards the side 50a of the element 50 at a bent section 89 provided ahead of the wire and inserted inside an insertion section 55 provided at the side 50a of the element 50 and mounted, and swingably supports the element 50 by attaching the other wire to the side of the stator 10, wherein a recessed section 56 is formed outside the section 55 provided at the side 50a of the element 50, is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration generator.

  Conventionally, for example, in mobile devices such as mobile phones that are terminals of mobile communication devices, a vibration generator is housed in the mobile device itself or in an accessory of the mobile device instead of notifying the incoming call by a ringing tone. There is a thing that makes the human body sense an incoming call by vibrating a vibration generator. In this type of conventional vibration generator, a rotating body is attached to the rotating shaft of the motor, and the center of gravity of the rotating body is set to a position different from the rotating shaft, and vibration is generated by rotating the rotating body. There was a structure to make it. However, the vibration generator with such a structure uses the vibration of the rotating shaft when rotating the rotating body as vibration, so the bearing portion of the rotating shaft of the motor receives severe force, and its durability and reliability There was a problem of obstructing.

  Therefore, in the previous application (Patent Document 1), the applicant of the present application, as shown in FIG. 9, excites the mover 150 to which the permanent magnet 170 is attached and the attached core-equipped coil 130 by passing a current. A stator 110 that forms a magnetic path between the mover 150 and a coil portion 181 formed by winding a wire rod in the middle of the wire rod is provided, and both ends thereof are arm portions 183 and 185, and an end portion of one arm portion 183 is provided. Vibration comprising an elastic support member 180, 180 made of a coil spring that supports the movable element 150 so that the movable element 150 can vibrate by attaching the end of the other arm 185 to the stationary element 110 side. A generator 100 has been proposed. Here, the elastic support member 180 is a so-called double torsion type coil spring formed by bending a single wire, similarly to the elastic support member 80 shown in FIG. 3 described below, and is substantially rotated at an intermediate portion of the wire. A pair of substantially parallel arm portions 183 and 183 and two arm portions 185 and 185 are projected from both sides of each of the two coil portions 181 wound about a half, and a pair of arm portions 183 and 183 extending in one direction are Each of the bent portions 189 is bent in a substantially right-angle direction, and the previous portion is connected to one by a connecting portion 182.

  Here, the arm portion 183 is attached to the mover 150 by inserting the arm portion 183 into an insertion portion 151 formed of an L-shaped cut groove provided on the side surface 150 a of the mover 150. That is, the arm portion 183 is installed substantially parallel to the side surface 150a of the mover 150 along the direction in which the mover 150 vibrates, and is substantially perpendicular to the side surface 150a side of the mover 150 at the bent portion 189 as described above. The insertion locking portion 151b with the groove end of the insertion portion 151 formed of a groove in which the connection portion 182 bent (in an L shape) is formed in the thickness direction of the mover 150 (direction orthogonal to the vibration direction). Is engaged in insertion. At this time, if the position of the bent portion 189 is installed at a position away from the side surface 150a of the mover 150 in the thickness direction, the dimension in the thickness direction of the entire vibration generator 100 is increased by a distance away from the side surface of the mover 150. Thus, the vibration generator 100 cannot be reduced in size. For this reason, as shown in FIG. 9, it is desirable that the bent portion 189 be installed as close to the side surface 150a of the mover 150 as possible.

However, when the bent portion 189 is installed close to the side surface 150 a of the mover 150, the inner peripheral side portion 189 a of the bent portion 189 is located on the side surface 150 a side of the mover 150 of the insertion portion 151 provided in the mover 150. A problem arises in that the movable portion 150 is vibrated due to strong contact with the portion of the insertion portion outer portion 151a that is positioned and rubbing. That is, the bent portion 189 is formed by bending a wire rod at a substantially right angle. However, since the elastic support member 180 is made of a coil spring and has a high strength, the inner peripheral side portion of the bent portion 189 can be bent at a right angle. 189a does not form a right angle but forms a predetermined arc. On the other hand, the inner diameter of the insertion portion 151 of the mover 150 is formed to be substantially the same as the wire diameter of the arm portion 183 so that there is no backlash between the insertion portion 151 and the arm portion 183 to be inserted. Therefore, when the arm portion 183 is inserted into the insertion portion 151 of the mover 150 and the bent portion 189 is installed close to the side surface of the mover 150, the bent portion is bent when the mover 150 vibrates with respect to the stator 110. The inner peripheral side portion 189a of the portion 189 and the portion of the insertion portion outer portion 151a of the insertion portion 151 rub against each other, so that a large resistance is generated in the vibration of the mover 150 and the vibration is attenuated.
JP 2002-153817 A

  The present invention has been made in view of the above-described points, and an object of the present invention is to obstruct vibration of the mover even if an elastic support member that supports the mover so as to vibrate is disposed close to the side surface of the mover. It is an object of the present invention to provide a vibration generator that does not cause the vibration.

  The invention according to claim 1 of the present application includes a mover having a permanent magnet attached thereto, a stator that forms a magnetic path between the mover by exciting the attached coil with an electric current, and a wire rod One of the two is disposed along the side surface of the mover, and is bent and attached to the side surface of the mover at the bent portion provided at the tip thereof, and is inserted into the insertion portion provided on the side surface of the mover, and is attached. In the vibration generator including the elastic support member that supports the movable element so as to vibrate by attaching the other to the stator side, a concave-shaped digging part is formed outside the insertion part provided on the side surface of the movable element. This is a vibration generator.

  The invention according to claim 2 of the present application is the vibration generator according to claim 1, wherein the depth dimension from the side surface of the recessed portion of the recessed portion of the digging portion is within the bent portion of the elastic support member. The vibration generator is characterized by having a dimension equal to or greater than the radius of curvature of the peripheral portion.

The invention according to claim 3 of the present application is the vibration generator according to claim 1 or 2,
The mover is a vibration generator comprising a sintered body formed by sintering a magnetic metal powder.

  According to a fourth aspect of the present invention, in the vibration generator according to the first or second aspect, the movable element comprises a thin electromagnetic steel plate provided with an insertion portion forming portion constituting the insertion portion. It is configured by laminating a plurality of magnetic steel sheets along the side surface of the mover and laminating the electromagnetic steel sheets provided with the digging portion forming portion constituting the digging portion outside the laminated electromagnetic steel plates. This is a vibration generator.

  Since the concave-shaped digging portion is provided outside the insertion portion on the side surface of the mover, the inner peripheral side portion of the bent portion of the elastic support member slides around the outer periphery of the insertion portion of the mover when the mover vibrates. Thus, there is no problem such as attenuation in the vibration of the mover.

  Since the depth dimension from the side surface of the mover of the digging portion is set to be larger than the radius of curvature of the inner peripheral side portion of the bent portion of the elastic support member, the bent portion of the elastic support member when the mover vibrates The inner peripheral side portion of the movable member does not slidably contact with the outer periphery of the insertion portion of the movable element, so that the vibration of the movable element is surely prevented from being damped.

  Since the mover is composed of a sintered body formed by sintering magnetic metal powder, it can be manufactured by a molding die, even if the shape of the mover yoke is complicated by providing a dug. Easy to manufacture.

  A plurality of thin electromagnetic steel plates provided with an insertion portion forming portion that constitutes the insertion portion are laminated along the side surface of the mover, and a dug portion that constitutes a dug portion outside the laminated electromagnetic steel plates. Since it is configured by laminating electromagnetic steel sheets provided with a forming part, eddy current does not occur inside the mover, and a mover with good performance as a magnetic material can be configured, and performance as a vibration generator is good Become. Furthermore, a digging part can be formed in various depths and shapes only by changing the thickness and number of the outer electromagnetic steel sheets and the shape of the digging part forming part formed on the outer electromagnetic steel sheet.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a perspective view of a vibration generator 1 according to an embodiment of the present invention, FIG. 2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. 3 is an exploded perspective view. As shown in these drawings, the vibration generator 1 is configured such that a movable element 50 is supported by two elastic support members 80 and 80 on an upper portion of a stator 10. Each component will be described below.

  As shown in FIG. 3, the stator 10 is configured by attaching a coil 30 with a core and two elastic bodies 40, 40 on a base portion 20 with a terminal. The base 20 with terminals is formed by molding a base body 21 made of a plate-like synthetic resin material as shown in FIG. 3 around the two metal terminal plates 23 and 23 shown in FIG. The connection portions 231 and 231 provided at the center of both terminal plates 23 and 23 are exposed at the center of the upper surface of the base body 21, while the surfaces of the terminal portions 233 and 233 of the both terminals 23 and 23 are exposed to the base body 21. It is exposed on the lower surface of the. On the upper surface of the base body 21, elastic body mounting portions 211 and 211 are provided on both the left and right sides, and a concave storage portion 213 for storing the cored coil 30 is provided between the two. Two spring end fixing portions 217 and 217 each having a small hole are provided in the center of the upper surface of the base body 21 in the vicinity of both sides 215 and 215, and spring end fixing portions 217 and 217 in the vicinity of both sides 215 and 215 are provided. Spring locking portions 219 and 219 are provided on both sides of the portion.

  The coil 30 with a core is configured by winding a coil 33 around a substantially rod-shaped coil core 31 and pulling out coil end portions 35 and 35 from both ends of the coil core 31, respectively. Here, the coil core 31 is formed of an iron sintered body in a substantially quadrangular prism shape, and the end surfaces 37, 37 at both ends thereof are substantially equal to the inclination angles of the inner side surfaces 53, 53 of the arm portions 52, 52 of the mover yoke 51 described below. A tapered surface having the same inclination angle is made parallel to the inner side surfaces 53 and 53.

  The elastic body 40 is made of a thin elastic plate and is formed in a shape that can be mounted on the elastic body mounting portions 211 and 211 of the base portion 20 with terminals, and the vicinity of both sides of the upper surface thereof is placed on the coil. Parts 401 and 401. A rubber material is suitable as the material of the elastic body 40, and silicon rubber is used in this embodiment.

  In the assembly of the stator 10, the cored coil 30 is housed in the housing part 213 of the terminal-equipped base part 20 and fixed with an adhesive or the like, and the coil ends 35, 35 at both ends are fixed to the base part 20 with the terminal. Are connected to and fixed to the connection portions 231 and 231 exposed on the upper surface of the base plate by various fixing means such as a low melting point metal, a conductive adhesive, and welding, respectively. This is done by placing the elastic bodies 40, 40, respectively. The stator 10 directly exposes the surfaces of the terminal portions 233 and 233 of the terminals 23 and 23 to the lower surface of the base body 21 so that the vibration generator 1 is directly attached to the circuit pattern on the circuit board to which the vibration generator 1 is attached. It is configured as a surface-mounting type that can be attached by low-melting-point metal reflow or the like.

  Next, as shown in FIGS. 1 to 3, each of the elastic support members 80 and 80 is a so-called double torsion type coil spring formed by bending a single wire, and is substantially half a rotation and half at an intermediate portion of the wire. A pair of arm portions 83, 83 projecting from two substantially parallel arm portions 83, 83 and arm portions 85, 85 from each side of the two coil portions 81, 81 wound so as to extend in one direction. Are bent in a substantially right-angled direction at bent portions 89 and 89 in the middle, and the tip portions thereof are connected together by an end portion (hereinafter referred to as “connecting portion”) 82. That is, the portion bent to the side surface 50 a side of the mover 50 becomes the connecting portion 82. Further, the distal ends of the other arm portions 85 and 85 are bent downward and configured as end portions (hereinafter referred to as “locking end portions”) 87 and 87.

  FIG. 5 is an exploded perspective view of the mover 50. As shown in the figure, in the mover 50, a weight 60, a permanent magnet 70, and a high permeability member (hereinafter referred to as “center yoke”) 75 are attached to a mover yoke 51 made of the same material as the coil core 31. Configured.

  The mover yoke 51 has a substantially quadrangular prism shape (bar shape) and is provided with arm portions 52 and 52 extending toward the stator 10 at both ends thereof, and is formed in a substantially “U” shape as a whole. Are formed as tapered inner side surfaces 53 and 53 facing the end surfaces 37 and 37 of the coil core 31 with a predetermined gap. Further, insertion portions 55 and 55 formed of L-shaped grooves which are cut from both outer end faces of the mover yoke 51 and bent upward at a substantially right angle in the middle are formed in the arm portions 52 and 52. The insertion portions 55 are provided so as to penetrate between both side surfaces 50 a in the thickness direction of the mover yoke 51. The portions extending upward of the insertion portions 55 and 55 serve as insertion locking portions 55a and 55a each having a groove with a groove end for inserting and locking the connecting portions 82 and 82 of the elastic support members 80 and 80, respectively. Here, the “side surfaces 50 a” of the mover 50 and the mover yoke 51 are two surfaces of the mover yoke 51 that are perpendicular to the short direction (thickness direction) of the mover 50 and the mover yoke 51. This is a surface along the direction in which the mover 50, which will be described later, vibrates. On the other hand, the “end face” indicates two outer surfaces of the mover yoke 51 perpendicular to the longitudinal direction (vibration direction of the mover 50). Shall.

  Further, groove insertion portions 56, 56 larger than the groove shape of the concave insertion locking portion 55a are formed in the insertion locking portions 55a, 55a on both side surfaces 50a of the mover yoke 51, respectively. The dug portions 56 and 56 are formed with a predetermined width (in the direction of the side surface 50a) and a depth in a portion around the insertion locking portion 55a on the side surface 50a side of the mover yoke 51. The depths of the dug portions 56 and 56 (the depth from the side surface 50a of the mover yoke 51) are formed to be larger than the curvature radius R described below of the bent portions 89 and 89 of the elastic support member 80.

  In this embodiment, the mover yoke 51 is composed of a sintered body formed by sintering a magnetic metal powder. In the case of this sintered body, since it is manufactured by a molding die, even if the shape becomes complicated by providing the digging portion 56 in the mover yoke 51, it can be easily manufactured. The mover yoke 51 may be manufactured by cutting a lump of magnetic metal into the shape of the mover yoke 51 instead of the sintered body formed by the above-described molding.

  FIG. 6 is a diagram showing another mover yoke 51-2 that can be used in place of the mover yoke 51 and a method for manufacturing the same. The mover yoke 51-2 is configured by laminating a plurality of thin electromagnetic steel plates 57 in the thickness direction (short direction) and further laminating thin electromagnetic steel plates 59 on both sides thereof. Each electromagnetic steel plate 57 is formed with insertion portion forming portions 57a and 57a having the same shape as the insertion portion 55 so as to form the insertion portion 55 by being laminated. The electromagnetic steel plate 59 has the same outer shape as the electromagnetic steel plate 57, and is dug in which the shape is formed slightly larger than the insertion portion forming portion 57a at a position overlapping the insertion portion forming portion 57a provided on the electromagnetic steel plate 57. A part forming part 59a is provided.

  To manufacture the mover yoke 51-2, as shown in FIG. 6 (a), a plurality of electromagnetic steel plates 57 are stacked with the insulator layer 58 sandwiched between the electromagnetic steel plates 57, and stacked. The electromagnetic steel plates 59 are laminated on both outer sides of the electromagnetic steel plate 57. Then, as shown in FIG. 6B, the thickness of the mover yoke 51-2 is set at three locations 51-2a on the upper surface of the laminated electromagnetic steel plates 57 and 59 and two locations 51-2b on the lower surface of the arm portion 52-2. In a direction, all the electromagnetic steel plates 57 and 59 are fixed by welding with a laser or the like so that they are fixed. Thereby, each electromagnetic steel plate 57 and 59 is fixed integrally, and the needle | mover yoke 51-2 is formed. Various changes can be made to the location and number of welding. Moreover, you may integrate the electromagnetic steel plates 57 and 59 by various methods other than welding, such as adhesion | attachment.

  In the mover yoke 51-2 formed as described above, the insertion portion 55 including the insertion locking portion 55a is formed by the insertion portion forming portion 57a of the laminated electromagnetic steel plates 57. Further, by the dug portion forming portion 59a of the electromagnetic steel plates 59 laminated on both outer sides, the thickness of the electromagnetic steel plate 59 is provided around the insertion locking portion 55a on the side surface side of the mover yoke 51-2 of the insertion portion 55. A digging portion 56 having a depth and having a shape slightly larger than the groove shape of the insertion portion forming portion 57a is formed.

  Since the mover yoke 51-2 is formed by laminating a thin electromagnetic steel plate 57 and an electromagnetic steel plate 59 with an insulator layer 58 interposed therebetween, generation of an eddy current can be prevented, which is preferable. Further, by changing the thickness and number of electromagnetic steel sheets 59 laminated on both outer sides and the shape and size of the digging portion forming portion 59a formed on the electromagnetic steel sheets 59, the digging formed on the mover yoke 51-2. The insertion portion 56 can be formed in various shapes and depths. The point is that the digging portion 56 has a shape and depth so that the periphery of the insertion locking portion 55a of the mover yoke 51-2 and the inner peripheral side portion 89a described below of the bent portion 89 of the elastic support member 80 do not rub against each other. What is necessary is just to form the electromagnetic steel plate 59 so that it may become.

  Returning to FIG. 5, the weight 60 is formed by a non-magnetic material (for example, a non-magnetic heavy metal powder such as tungsten in a molding resin such as nylon in order to prevent a magnetic path from being formed in the weight 60 portion. Mold). A storage portion 61 for fitting the permanent magnet 70 is provided in the center of the weight 60, and a fitting having a size and shape that is recessed in the upper portion of the storage portion 61 to fit the lower surface and the side surface 50a of the mover yoke 51. A portion 63 is provided. That is, the width of the fitting portion 63 is substantially the same as the width of the mover yoke 51, and the length of the weight 60 in the vibration direction is the width dimension between the root portions a of the arms 52, 52 of the mover yoke 51. When the fitting portion 63 of the weight 60 is attached to the portion between the arms 52 and 52 of the mover yoke 51, the weight 60 is correctly positioned on the mover yoke 51. It is comprised so that. Further, notches 65 are provided at the four corners of the lower surface of the weight 60. The notch 65 is for preventing the coil portion 81 of the elastic support members 80 and 80 from colliding with the weight 60 when the mover 50 vibrates.

  The permanent magnet 70 is a rectangular plate member, and the upper and lower surfaces thereof are configured as SN magnetic poles. The vertical and horizontal dimensions of the surface of the permanent magnet 70 are formed to be substantially the same as the vertical and horizontal dimensions of the upper surface of the coil 33, and are formed in a dimension shape that just covers the upper surface of the coil 33.

  The center yoke 75 is a thin quadrilateral plate member, and the length L1 of the movable element 50 in the vibration direction is the same as the length dimension of the permanent magnet 70 in the same direction, and is perpendicular to the vibration direction of the movable element 50. The length dimension L2 is formed to be the same as the length dimension of the weight 60 in the same direction. The material of the center yoke 75 is composed of a high magnetic permeability member for collecting magnetic flux therein, and for example, pure iron or permalloy is used.

  The assembly of the mover 50 is performed by inserting the permanent magnet 70 into the storage portion 61 of the weight 60 with the fitting portion 63 of the weight 60 fitted in the center of the lower surface of the mover yoke 51, and the center yoke 75 below it. It is done by attaching.

  Next, in order to assemble the vibration generator 1, in FIG. 3, the locking ends of the elastic support members 80, 80 are attached to the spring end fixing portions 217, 217 of the stator 10 to which the cored coil 30 and the elastic bodies 40, 40 are attached. The portions 87 and 87 are inserted, and at the same time, the arm portions 85 of the elastic support members 80 and 80 are locked to the spring locking portions 219 of the stator 10. Thus, by fixing the locking end portions 87 and 87 of the elastic support members 80 and 80 and the arm portion 85, the coil portions 81 and 81 are slightly pressed on the coil mounting portions 401 and 401 of the elastic body 40. The elastic support members 80 and 80 are reliably supported at three points.

  On the other hand, the connecting portions 82 and 82 of the elastic support members 80 and 80 are inserted into the insertion portions 55 and 55 of the mover 50 and inserted into the innermost insertion locking portions 55a and 55a. That is, the arm portions 83, 83 of the elastic support member 80 located along the side surface 50a of the mover 50 are bent toward the side surface 50a of the mover 50 by bending portions 89, 89 provided in the middle thereof. The connecting portion 82 which is a part is inserted into the insertion locking portions 55a and 55a.

  At this time, as shown in FIG. 2 (b), the bent portions 89 and 89 of the elastic support member 80 are in a position almost in contact with the side surface 50a of the mover 50, but around the outer side of the insertion locking portions 55a and 55a. Since the dug portions 56 and 56 are formed, the inner peripheral portions 89a and 89a of the bent portions 89 and 89 do not hit the outer periphery of the insertion locking portions 55a and 55a. FIG. 7 is a view showing the relationship between the dug portion 56 of the mover yoke 51 and the bent portion 89 of the elastic support member 80 when the elastic support member 80 is attached to the mover 50. In the figure, the depth T of the dug portion 56 is formed to be equal to or greater than the curvature radius R of the inner peripheral side portion 89a of the bent portion 89 (T ≧ R). Thereby, the inner peripheral side portion 89a of the bent portion 89 does not contact the outer periphery of the insertion locking portion 55a. Therefore, even when the mover 50 vibrates, they do not rub against each other. The radius of curvature R of the inner peripheral side portion 89a of the bent portion 89 is usually equal to or larger than the wire diameter of the wire rod of the elastic support member 80 even if it is the smallest, so the depth T of the dug portion 56 is the elastic support member. The wire diameter is preferably 80 or more.

  On the other hand, the outer shape of the dug portion 56 in two planes perpendicular to the depth direction of the dug portion 56 (the xy plane in FIG. 2, that is, the side surface 50 a) is the same as that of the mover 50 in the present embodiment. Since the arm part 83 moves in a fan shape with the bent part 89 as a fulcrum, the above outer shape including the movement range of the fan-shaped arm part 83 is preferable. Thus, the surface of the arm portion 83 including the inner peripheral side portion 89a on the movable element yoke 51 side can move without contacting the side surface 50a of the movable element yoke 51 during vibration.

  FIG. 8 is a diagram showing the positional relationship between the stator 10 and the mover 50 of the vibration generator 1. As shown in the figure, both end surfaces 37, 37 of the stator 10 have predetermined gaps 28, 28 (both the left and right gap dimensions are the same) with respect to the inner surfaces 53, 53 of the arm portions 52, 52 of the mover 50. The opposing surfaces are configured to be parallel to each other. The mover 50 is supported by elastic support members 80, 80 so as to vibrate in the direction of magnetization of the stator 10 by the coil 33 (that is, in the direction of arrow E in FIG. 8). At this time, the magnetic pole surface on the side where the center yoke 75 of the permanent magnet 70 is attached is disposed through the gap 27 so as to oppose the outer peripheral side surface of the coil 33, and this opposing surface is configured to be parallel.

  The magnetic path of the vibration generator 1 configured as described above enters the coil core 31 through the outer peripheral side surface of the coil 33 from the magnetic pole surface on the side where the center yoke 75 of the permanent magnet 70 is attached, and is formed by the coil 33 in the coil core 31. Both arm portions of the mover 50 are guided so as to face the magnetization direction of the stator 10 (NS magnetic pole direction, that is, both end surfaces 37 and 37 directions), and further from both end surfaces 37 and 37 of the coil core 31 through the gaps 28 and 28. 52 and 52 are formed so as to enter the inner surfaces 53 and 53 and return from the center of the mover yoke 51 to the other magnetic pole surface of the permanent magnet 70 again.

  The vibration generator 1 is placed on a circuit board (not shown), and a terminal part 233 of the base part 20 with a terminal is brought into contact with a circuit pattern (terminal pattern) provided on the circuit board so that a low melting point metal or the like. Secure the connection electrically and mechanically. When a predetermined current is passed through the coil 33 from the circuit board side (not shown), the mover 50 starts a single vibration to the left and right. That is, as shown in FIG. 8, when no current is passed through the coil 33, the elastic support members 80, 80 maintain the mover 50 in the neutral position. Next, when a current is supplied to the coil 33, NS magnetic poles are excited on both end faces 37, 37 of the coil core 31, and the right inner surface 53 of the mover 50 is attracted toward the facing end face 37 (left direction). . When the right inner side surface 53 of the mover 50 approaches the opposing end surface 37, if the direction of the current supplied to the coil 33 is reversed, a thrust force that pulls the mover 50 in the reverse direction (rightward direction) is generated. The child 50 starts moving in the opposite direction.

  By reversing the current in accordance with the vibration frequency of the mover 50, the mover 50 is reversed and moved just before the inner side surfaces 53, 53 of the mover 50 come into contact with the end surfaces 37, 37 of the stator 10. (That is, the end faces 37, 37 and the inner side faces 53, 53 are not always in contact), and the vibration of the mover 50 is repeated.

  When the mover 50 vibrates in a substantially horizontal direction (the direction of arrow E in FIG. 8), the arm portions 83 and 83 of the elastic support member 80 supporting the mover 50 swing. However, as shown in FIG. 7, since the digging portion 56 is formed outside the insertion portion 55, the inner peripheral side portion 89a of the bent portion 89 is inserted and locked even if the arm portion 83 swings. It does not contact the outer periphery of the portion 55a. Therefore, unlike the conventional case, when the mover vibrates, there is no problem that the outer periphery of the insertion portion and the inner peripheral side portion of the bent portion are slidably contacted to attenuate the vibration of the mover.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, the shape, structure, and material of the components constituting each member such as the stator 10, the mover 50, and the elastic support member 80 can be variously modified. Further, the dug portions 56 provided in the mover yokes 51 and 51-2 are not limited to the above-described shape and depth. In short, the bending of the elastic support member 80 is performed when the mover 50 vibrates. Any shape and depth may be used as long as the inner peripheral side portion 89a of the portion 89 does not slide on the outside of the insertion portion 55.

  Further, in the vibration generator of the present invention, the structure for vibrating the mover is not limited to the above-described embodiment, and a current is passed through a coil attached to the stator to excite the mover. Any shape and structure may be used as long as a magnetic path is formed between them. Furthermore, the vibration generator of the present invention is not limited to use in a portable device, and it goes without saying that it can be applied to any device that generates vibrations.

1 is a perspective view showing a vibration generator 1 according to an embodiment of the present invention. 2A is a front view of the vibration generator 1, and FIG. 2B is a side view. 1 is an exploded perspective view of a vibration generator 1. FIG. It is a perspective view of the terminal boards 23 and 23. FIG. 3 is an exploded perspective view of a mover 50. FIG. It is a figure which shows the needle | mover yoke 51-2, the figure (a) is a perspective view which shows the state in the middle of manufacture, and the figure (b) is a perspective view which shows the completed state. FIG. 5 is a view showing a relationship between a dug portion 56 of a mover yoke 51 and a bent portion 89 of an elastic support member 80. It is a figure which shows the positional relationship of the stator 10 and the needle | mover 50. FIG. 9A is a front view of a conventional vibration generator 100, and FIG. 9B is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration generator 10 Stator 20 Base part 21 Base main body 23 Terminal board 30 Coil 37 with a core 37 End surface 40 Elastic body 50 Movable element 50a Side surface 51 Movable element yoke 52 Arm part 53 Inner side surface 55 Insertion part 55a Insertion locking part 56 Digging portion 57 Electromagnetic steel plate 57a Inserting portion forming portion 58 Insulator layer 59 Electromagnetic steel plate 59a Digging portion forming portion 60 Weight 70 Permanent magnet 75 High permeability member (center yoke)
80 Elastic support member 81 Coil part 82 Connection part 83 Arm part 85 Arm part 87 Locking end part 89 Bending part 89a Inner peripheral side part

Claims (4)

A mover with a permanent magnet attached,
A stator that forms a magnetic path between the movable element by exciting the attached coil by passing an electric current;
One of the wire rods is arranged along the side surface of the mover, and is bent and attached to the side surface side of the mover at the bent portion provided at the tip, and is inserted into the insertion portion provided on the side surface of the mover, and is attached. In the vibration generator comprising an elastic support member that supports the movable element so that the movable element can be vibrated by attaching the other side to the stator side,
A vibration generator characterized in that a recessed digging portion is formed outside an insertion portion provided on a side surface of the movable element. The vibration generator according to claim 1.
The vibration generator according to claim 1, wherein a depth dimension from the side surface of the concave shaped movable element of the digging portion is equal to or larger than a curvature radius of an inner peripheral side portion of the bent portion of the elastic support member. The vibration generator according to claim 1 or 2,
The mover is composed of a sintered body obtained by sintering and molding magnetic metal powder. The vibration generator according to claim 1 or 2,
The movable element is formed by laminating a plurality of thin electromagnetic steel sheets provided with an insertion part forming part that constitutes the insertion part along a side surface of the movable element, and the digging part is provided outside the laminated electromagnetic steel sheet. A vibration generator characterized in that it is configured by laminating electromagnetic steel plates provided with a dug-portion forming portion.

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