JP2011245409A - Vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate vibration in a plurality of directions in a space-saving manner.SOLUTION: A mover is formed by permanent magnets 21, 22 having magnetic poles disposed opposite each other and a weight 23. Coils 31 and 32 are wound around magnetic bodies (36, 37 or the like) in a direction orthogonal to each other to form a stator. Leaf springs (41X and 42X) for vibrations in an X-axis direction and leaf springs (41Z, 41Z, 42Z, 42Z) for vibrations in a Z-axis direction are arranged on side surfaces of the mover. The mover is vibrated in the X-axis direction by magnetic action between a magnetic field generated by supplying a current to the coil 31 and the permanent magnets 21, 22 and thrust of the leaf springs for vibrations in the X-axis direction. The mover is vibrated in the Z-axis direction by magnetic action between a magnetic field generated by supplying a current to the coil 32 and the permanent magnets 21, 22 and thrust of the leaf springs for vibrations in the Z-axis direction.

Description

  The present invention relates to a vibration generator mounted on a portable terminal device or the like.

  Some terminal devices such as mobile phones make a human body sense an incoming call by vibrating a vibration generator in the terminal device instead of notifying the incoming call with a ringing tone. On the other hand, a vibration generator (vibration generator for vibrating the diaphragm of the speaker) is also used to generate sound with a speaker for voice calls. Patent Documents 1 and 2 disclose a vibration generator that uses a coil and a permanent magnet to oscillate a mover uniaxially.

  While the direction of vibration suitable for making the human body sense the incoming call depends on the structure of the terminal device, etc., the direction of vibration for voice calls depends on the shape of the terminal device, the position of the speaker, etc. The direction and the latter direction are often different from each other, and the required vibration amount and vibration frequency are different between the former and the latter directions. Therefore, a conventional terminal device (mobile phone) is separately provided with a vibration generator for incoming call notification and a vibration generator for voice call.

  When it is necessary to generate vibrations in a plurality of directions in the terminal device other than the use of incoming call notification and the use of voice call, a vibration generator corresponding to the vibration direction is required.

  Patent Document 3 discloses an objective lens driving device that uses two coils to drive the objective lens in the biaxial direction.

JP-A-11-168869 JP-A-11-155274 JP 58-64648 A

  In recent years, there is a strong need for downsizing terminal devices such as mobile phones. Needless to say, if the number of vibration generators can be reduced, downsizing of the terminal device incorporating the vibration generator is promoted. Since the technique disclosed in Patent Document 3 is a technique for an objective lens driving device, the technique cannot be used as it is for a vibration generator.

  Therefore, an object of the present invention is to provide a vibration generator that can generate vibrations in a plurality of directions in a space-saving manner.

  The vibration generator according to the present invention has a magnet part having at least one pair of magnets with magnetic poles opposed to each other, and a magnetic body arranged between a plurality of magnets forming the magnet part so that the winding direction is different from each other. A plurality of coils wound around the magnetic body, and an elastic support part that supports the magnet part using an elastic body so that a relative positional relationship between the magnet part and the magnetic body is variable. The present invention is characterized in that vibrations in a plurality of different directions are generated using a magnetic action of a magnetic field generated by independently supplying currents to the plurality of coils and the magnet unit.

  Thereby, the members for generating vibrations in a plurality of directions can be integrated into one vibration generator, and vibrations in a plurality of directions can be generated in one vibration generator. Thereby, it becomes possible to generate vibrations in a plurality of directions in a space-saving manner.

  Specifically, for example, the magnetic body and the plurality of coils form a stator fixed to the main housing of the vibration generator, while the magnet unit vibrates based on the position of the stator. A movable element is formed.

  By arranging the coil on the stator side, wiring damage due to vibration is less likely to occur.

  More specifically, for example, the mover is disposed outside the stator.

  By adopting a configuration in which the mover is arranged outside the stator, the size of the mover can be increased, and as a result, a larger amount of vibration can be obtained under a defined size constraint. .

  More specifically, for example, the elastic support portion includes a first elastic body that expands and contracts in a first direction and a second elastic body that expands and contracts in a second direction different from the first direction, and generates the vibration. The device vibrates the mover in the first direction using the magnetic action and the thrust of the first elastic body, and causes the mover to move to the second direction using the magnetic action and the thrust of the second elastic body. Vibrate in the direction.

  Thereby, vibrations in the first and second directions are realized.

  For example, the elastic support part further includes an elastic body fixing part coupled to one end of the first elastic body and one end of the second elastic body, and the other end of the first elastic body is coupled to the movable element. The other end of the second elastic body is coupled to the main housing.

  Thereby, the elastic support part which implement | achieves the vibration of multiple directions is realizable in a space-saving, As a result, the space saving of the whole vibration generator is also implement | achieved.

  For example, the plurality of coils include a first coil having a central axis parallel to the first direction and a second coil having a central axis parallel to the second direction. The generator vibrates the mover in the first direction using the magnetic action of the magnetic field generated by supplying a current to the first coil and the magnet portion and the thrust of the first elastic body, The mover is vibrated in the second direction using the magnetic action of the magnetic field generated by supplying a current to the second coil and the thrust of the second elastic body.

  Further, for example, by supplying current to the plurality of coils simultaneously, the mover may be vibrated in a direction different from the central axis direction of each coil.

  As a result, vibrations in various directions can be generated.

  Further, for example, as a pair of magnets with magnetic poles opposed to each other, the magnet portion includes first and second pairs, and the magnetic poles opposed to each other in the first pair are the same pole and the second pair. The magnetic poles facing each other in FIG. 5 are also the same pole, and one of the magnetic poles facing each other in the first pair and the magnetic poles facing each other in the second pair is an N pole and the other is an S pole.

  As described above, providing a plurality of pairs of magnets makes it easier to obtain a larger amount of vibration than in the case of one pair.

  More specifically, for example, the elastic support portion includes a first elastic body that expands and contracts in a first direction, and a second elastic body that expands and contracts in a second direction different from the first direction, The coils include a first coil having a central axis parallel to the first direction and a second coil having a central axis parallel to the second direction. In the first pair, The magnetic poles face each other, and in the second pair, the magnetic poles face each other in the second direction, and the vibration generator generates a magnetic field generated by supplying a current to the first coil and the magnet unit. Using the magnetic action and the thrust of the first elastic body to vibrate the mover in the first direction and supplying a current to the second coil, the magnetic action between the magnetic part and the magnet part, and the first 2 Use the thrust of the elastic body to vibrate the mover in the second direction. .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the vibration generator which can generate | occur | produce the vibration of multiple directions in space-saving.

  The significance or effect of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely one embodiment of the present invention, and the meaning of the term of the present invention or each constituent element is not limited to that described in the following embodiment. .

1 is an overall configuration diagram of a vibration system according to a first embodiment of the present invention. It is an exploded view of the vibration generator concerning a 1st embodiment of the present invention. 1 is an external perspective view of a vibration generator in a state where an upper case is separated from a lower case according to the first embodiment of the present invention. 1 is an external perspective view of a vibration generator 1 in a state where an upper case is removed according to a first embodiment of the present invention. It is a top view of the needle | mover and stator which looked at Z-axis direction according to 1st Embodiment of this invention. It is a figure for demonstrating the structure and formation method of a stator concerning 1st Embodiment of this invention. FIG. 4 is a plan view (a) of the stator on the XY coordinate plane and a plan view (b) of the stator on the YZ coordinate plane according to the first embodiment of the present invention. It is a figure which concerns on 1st Embodiment of this invention and shows the relationship between each member in an elastic support part, a needle | mover, an upper case, and a lower case. It is an appearance perspective view of a leaf spring concerning a 1st embodiment of the present invention. FIG. 4 is a cross-sectional view of the mover and the stator along the XY coordinate plane according to the first embodiment of the present invention. It is sectional drawing of the needle | mover and stator along a YZ coordinate plane concerning 1st Embodiment of this invention. It is a figure which concerns on 1st Embodiment of this invention and shows the relationship between the frequency of the alternating voltage applied to a 1st coil, and the displacement amount of the needle | mover in a X-axis direction. The relationship between the frequency of the alternating voltage applied to a 2nd coil and the displacement amount of the needle | mover in a Z-axis direction is related with 1st Embodiment of this invention. It is a whole block diagram of the vibration system which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the structure of the vibration generator which concerns on 2nd Embodiment of this invention. It is an external appearance perspective view of the vibration generator which removed the main housing | casing concerning 2nd Embodiment of this invention. It is a top view of the needle | mover and stator which looked at 2nd Embodiment of this invention from the Z-axis direction. It is sectional drawing of the needle | mover and stator along an XY coordinate plane concerning 2nd Embodiment of this invention. It is sectional drawing of the needle | mover and stator along an XY coordinate plane concerning 2nd Embodiment of this invention. It is a whole block diagram of the vibration system which concerns on 3rd Embodiment of this invention. It is a schematic block diagram of a structure of the vibration generator which concerns on 3rd Embodiment of this invention. It is an external appearance perspective view of the vibration generator which removed the main housing | casing concerning 3rd Embodiment of this invention. It is an external view of the terminal device which concerns on 4th Embodiment of this invention. It is a schematic block diagram of the terminal device which concerns on 4th Embodiment of this invention. It is sectional drawing of the needle | mover and stator which followed the XY coordinate plane according to the modification of embodiment of this invention.

  Hereinafter, some embodiments of the present invention will be specifically described with reference to the drawings. In each of the drawings to be referred to, the same part is denoted by the same reference numeral, and redundant description regarding the same part is omitted in principle. Moreover, in each embodiment shown below, as long as there is no contradiction, the matter described in one embodiment can also be applied to another embodiment.

<< First Embodiment >>
A first embodiment of the present invention will be described. FIG. 1 is an overall configuration diagram of the vibration system according to the first embodiment. The vibration system according to the first embodiment includes a vibration generator 1, a current supply unit 2, and a vibration control unit 3. FIG. 2 is an exploded view of the vibration generator 1. In this embodiment and other embodiments described later, an XYZ coordinate system that is a fixed three-dimensional orthogonal coordinate system is assumed, and the coordinate axes of the XYZ coordinate system are the X axis, the Y axis, and the Z axis. The X axis, the Y axis, and the Z axis are orthogonal to each other. In the following description, the XY coordinate plane refers to a coordinate plane parallel to the X axis and the Y axis, the YZ coordinate plane refers to a coordinate plane parallel to the Y axis and the Z axis, and the ZX coordinate plane refers to the Z axis and the X axis. Refers to a coordinate plane parallel to the axis.

  In the normal use state, the upper case 11 is fixed to the lower case 12. FIG. 3 is an external perspective view of the vibration generator 1 in a state where the upper case 11 is separated from the lower case 12. FIG. 4 shows an external perspective view of the vibration generator 1 with the upper case 11 removed. However, although the case coupling members 13 and 14 are shown in FIG. 4, the case coupling members 13 and 14 are not shown in FIGS. 2 and 3. The upper case 11 and the lower case 12 are coupled via case connecting members 13 and 14. 3 and 4, the portions of the permanent magnets 21 and 22 are hatched.

  2 and 3, the length of the lower case 12 in the Y-axis direction is longer than the length of the weight body 23 in the Y-axis direction. However, in FIG. The lower case 12 is shown as if the length relationship is reversed. Actually, in the Y-axis direction, the length of the lower case 12 may be longer than the length of the weight body 23, or the length of the lower case 12 may be shorter than the length of the weight body 23.

  In addition to the upper case 11, the lower case 12, and the case connecting members 13 and 14, the vibration generator 1 is provided with a spacer 15, a mover 20, a stator 30, and an elastic support 40 (see FIG. 2). The main housing of the vibration generator 1 includes at least an upper case 11 and a lower case 12 as components, and may further include case connecting members 13 and 14. In the main housing (main housing having a hollow inside) of the vibration generator 1, the mover 20, the stator 30, and the elastic support portion 40 are installed.

  If no current is supplied to the coils 31 and 32 forming the stator 30, the mover 20 stops at the reference position. A state where the mover 20 is stationary at the reference position is referred to as a reference stationary state.

  The mover 20 includes two permanent magnets 21 and 22 and a weight body 23. The weight body 23 is a weight for setting the mass of the mover 20 to a desired mass. A weight body 23 is formed by providing a hole 24 for disposing the permanent magnets 21 and 22 and the stator 30 in a rectangular parallelepiped (rectangular plate-like) weight (see FIG. 2). FIG. 5 is a plan view of the mover 20 and the stator 30 in the reference stationary state as seen from the Z-axis direction. In the reference stationary state, the Z axis passes through the center of the movable element 20 and also through the center of the stator 30. The centers of the mover 20 and the stator 30 are assumed to coincide with the centers of gravity of the mover 20 and the stator 30, respectively. The center position of the mover 20 in the reference stationary state is called an origin O. The X axis, the Y axis, and the Z axis intersect each other at the origin O. The center of the stator 30 can be placed at the origin O.

  Permanent magnet 21, stator 30 and permanent magnet 22 are arranged in hole 24 along the Y-axis direction in this order. Thus, in the vibration generator 1, the mover 20 is disposed outside the stator 30 (in other words, the stator 30 is disposed inside the mover 20). The direction from the origin O toward the permanent magnet 21 is the positive direction of the Y axis, and the direction from the origin O toward the permanent magnet 22 is the negative direction of the Y axis. Therefore, in the XY coordinate plane, the permanent magnet 21 is located in the first and second quadrants, and the permanent magnet 22 is located in the third and fourth quadrants. Each of the permanent magnets 21 and 22 is a substantially rectangular parallelepiped permanent magnet.

  In the permanent magnet 21, the direction from the S pole surface where the S pole exists to the N pole surface where the N pole exists matches the direction from the positive side of the Y axis toward the origin O along the Y axis. In the permanent magnet 22, the direction from the S pole surface where the S pole exists toward the N pole surface where the N pole exists matches the direction from the negative side of the Y axis toward the origin O along the Y axis. Thus, the permanent magnets 21 and 22 are fixed to the weight body 23 so that the N poles of the permanent magnets 21 and 22 face each other. In each of the permanent magnets 21 and 22, the positional relationship between the N pole and the S pole can be reversed.

  Also, as shown in FIGS. 3 and 4, leaf spring fixing portions 41 and 42 that form the elastic support portions 40 are arranged one by one at both ends of the mover 20 in the X-axis direction. The direction from the origin O to the leaf spring fixing portion 41 along the X axis is the positive side direction of the X axis, and the direction from the origin O to the leaf spring fixing portion 42 along the X axis is the negative side direction of the X axis. Suppose there is.

  As shown in FIG. 2, the stator 30 includes coils 31 and 32, a rectangular parallelepiped central yoke 33 having a longitudinal direction in the X-axis direction, and gap yokes 34 and 35, and yokes 36 to 39 each having a rectangular parallelepiped shape. And formed from. Any of the yokes described herein, including the central yoke 33, the clearance yokes 34 and 35, and the yokes 36-39, are magnetic materials having a sufficiently high relative permeability (eg, hundreds to tens of thousands). A member composed of the central yoke 33, the gap yokes 34 and 35, and the yokes 36 to 39 can also be called a stator yoke.

  With reference to FIGS. 6A to 6D, the structure and the forming method of the stator 30 will be described. First, coils 31 and 32 are formed in advance so as to be equivalent to a coil wound along the outer periphery of a member having a rectangular cross section, and as shown in FIG. A central yoke 33 is disposed on the surface. The stator 30 is disposed in the vibration generator 1 so that the direction of the central axis of the coil 31 is parallel to the X axis (see FIG. 2 and the like). That is, the coil 31 is a winding wound around the X axis. When the central yoke 33 is disposed on the inner peripheral side of the coil 31, a gap is generated between the coil 31 and the central yoke 33. As shown in FIG. 6B, gap yokes 34 and 35 are inserted into the gap and fixed so that the gap is filled with a magnetic material.

  Further, as shown in FIG. 6 (c), a coil 32 formed in advance is fitted into a member in which the coil 31, the central yoke 33, and the gap yokes 34 and 35 are coupled. At this time, the coil 32 is arranged so that the central axis of the coil 31 and the central axis of the coil 32 are orthogonal to each other. More specifically, the direction of the central axis of the coil 32 is parallel to the Z axis, and the coil 32 is a winding wound around the Z axis. The coil 32 and the central yoke 33 are formed and the arrangement position of the coil 32 is determined so that the central yoke 33 is arranged with no gap as far as the inner peripheral side of the coil 32.

  Finally, as shown in FIG. 6 (d), the yokes 36 to 39 are coupled and fixed to the coil 31, the central yoke 33, the gap yokes 34 and 35, and the member coupled with the coil 32, thereby fixing the stator. 30 is completed.

  In this embodiment, the coils 31 and 32 formed in advance are coupled to the central yoke 33 and the like. However, the coils 31 and 32 are formed by winding the windings in accordance with the shape of the yoke. Also good. That is, for example, a grooved yoke (not shown) equivalent to the stator yoke of the stator 30 is formed by providing grooves for arranging the coils 31 and 32 in a rectangular parallelepiped yoke member, and the yoke 31 is formed in the grooved yoke. And the stator obtained by winding 32 may be used as the stator 30.

  FIG. 7A is a plan view of the stator 30 on the XY coordinate plane viewed from the positive side of the Z axis. When the stator 30 is viewed from the negative side of the Z axis, the yokes 38 and 39 are observed instead of the yokes 36 and 37. FIG. 7B is a plan view of the stator 30 on the YZ coordinate plane viewed from the positive side of the X axis. When the stator 30 is viewed from the negative side of the X axis, the yokes 36 and 38 are observed instead of the yokes 37 and 39.

  As shown in FIG. 7A, on the XY coordinate plane, the center of the coil 31 is located at the origin O, and the yokes 36 to 39 are arranged so as to sandwich the coil 31 from the positive side and the negative side of the X axis. Each of the yokes 36 and 38 is disposed in the second and third quadrants of the XY coordinate plane, and each of the yokes 37 and 39 is disposed in the first and fourth quadrants of the XY coordinate plane. As shown in FIG. 7B, on the YZ coordinate plane, the center of the coil 32 is located at the origin O, and the yokes 36 to 39 are arranged so as to sandwich the coil 32 from the positive side and the negative side of the Z axis. Each of the yokes 36 and 37 is arranged in the first and second quadrants of the YZ coordinate plane, and each of the yokes 38 and 39 is arranged in the third and fourth quadrants of the YZ coordinate plane.

  The stator 30 is fixed to the lower case 12 via the spacer 15 of FIG. As described above, since the upper case 11 and the lower case 12 are coupled via the case coupling members 13 and 14 (see FIG. 4), the stator 30 is fixed to the main housing of the vibration generator 1. It becomes. On the other hand, the mover 20 vibrates with reference to the position of the stator 30. This vibration is realized using the elastic support portion 40.

As shown in FIG. 2 and the like, the elastic support portion 40 includes leaf spring fixing portions 41 and 42 and six leaf springs 41X, 41Z ₁ , 41Z ₂ , 42X, 42Z ₁ and 41Z _2. And the movable element 20 is supported using an elastic body so that the relative positional relationship of the stator 30 is variable. Each leaf spring is an elastic body formed by bending a plate-like metal body.

FIG. 8 shows the relationship among the members in the elastic support portion 40, the mover 20, the upper case 11, and the lower case 12 on the ZX coordinate plane. In FIG. 8, each leaf spring is indicated by a simple spring symbol. Leaf spring fixing portion 41 is a rigid body consisting of rod-shaped metal or the like, the leaf spring 41X, one end of each of 41Z ₁ and 41Z ₂ are fixed to the plate spring fixing portion 41. On the other hand, the other end of the leaf spring 41X is coupled to the side surface 25 of the movable member 20 (e.g., contact), the other end of the leaf spring 41Z ₁ is fixed to the upper case 11, below the other end of the leaf spring 41Z ₂ Case 12 is fixed. Similarly, the leaf spring fixing portion 42 is a rigid body consisting of rod-shaped metal or the like, the leaf springs 42X, the respective end 42Z ₁ and 42Z ₂ are fixed to the plate spring fixing portion 42. On the other hand, the other end of the leaf spring 42X is coupled to the side surface 26 of the movable member 20 (e.g., contact), the other end of the leaf spring 42Z ₁ is fixed to the upper case 11, below the other end of the leaf spring 42Z ₂ Case 12 is fixed.

  Here, the side surface 25 is a surface parallel to the YZ coordinate plane and located on the positive side of the X axis, and the side surface 26 is parallel to the YZ coordinate plane and located on the negative side of the X axis. It is. Actually, the side surfaces 25 and 26 are side surfaces of the weight body 23. The leaf springs 41X and 42X are provided with claws (not shown) or the like for fixing the positional relationship so that the positional relationship between the mover 20 and the leaf springs 41X and 42X in the Z-axis direction does not change even in the vibration state of the mover 20. It is good to provide. Alternatively, for example, a positioning groove (not shown) is provided on each of the side surfaces 25 and 26, and the side surface 25 and the leaf spring 41 </ b> X are brought into contact with each other in the side surface groove and the side surface 26 and the leaf spring 42 </ b> X are brought into contact with each other. You may do it.

  The expansion / contraction direction of the leaf springs 41X and 42X is the X-axis direction. When the leaf spring 41X contracts, the leaf spring 42X extends to move the mover 20 in the positive direction of the X axis. Conversely, when the leaf spring 41X extends, the leaf spring 42X contracts and the mover 20 moves in the negative direction of the X axis. When the leaf springs 41X and 42X are expanded and contracted, the positions of the leaf spring fixing portions 41 and 42 are not changed (although they may move slightly, they are substantially unchanged).

The expansion / contraction direction of the leaf springs 41Z ₁ , 41Z ₂ , 42Z ₁ and 42Z ₂ is the Z-axis direction. The direction from the lower case 12 to the upper case 11 along the Z axis is assumed to be the positive direction of the Z axis. When the leaf springs 41Z ₁ and 42Z ₁ contract, the leaf springs 41Z ₂ and 42Z ₂ extend, and the mover 20 moves in the positive direction of the Z axis together with the leaf spring fixing portions 41 and 42 and the leaf springs 41X and 42X. Conversely, when the leaf springs 41Z ₁ and 42Z ₁ extend, the leaf springs 41Z ₂ and 42Z ₂ contract, and the mover 20 moves in the negative direction of the Z axis together with the leaf spring fixing portions 41 and 42 and the leaf springs 41X and 42X. To do.

  Each of FIGS. 9A and 9B is an external perspective view of one leaf spring. A leaf spring as shown in FIG. 9A or FIG. 9B can be used as each leaf spring in the elastic support portion 40. Note that the elastic body in the elastic support portion 40 may be an arbitrary elastic body. However, it is possible to reduce the size of the elastic support portion 40 and, consequently, the overall size of the vibration generator 1 by using a plate spring instead of a spring (not shown) made of a spiral metal wire as the elastic body.

  Next, a vibration generation method in the vibration generator 1 will be described. The current supply unit 2 in FIG. 1 individually supplies excitation current to the coils 31 and 32 by applying a sinusoidal or rectangular wave AC voltage to the coils 31 and 32 individually. The vibration control unit 3 in FIG. 1 controls the current supply unit 2 to determine whether or not to apply an AC voltage to the coils 31 and 32, the magnitude and frequency of the AC voltage to be applied to the coils 31 and 32, and the like. It can be controlled for each coil.

  Although not shown in each drawing including FIG. 1 and FIG. 2, a pair of lead wires electrically connected to both ends of the coil 31 through holes or the like provided in the lower case 12 are provided on the lower case 12. Pulled out to the outside. The current supply unit 2 applies an alternating voltage to the pair of lead wires to cause an alternating excitation current to flow through the coil 31, whereby a magnetic pole corresponding to the excitation current appears in the stator 30 (the same applies to the coil 32). ). The same applies to other embodiments described later.

When no exciting current is passed through the coils 31 and 32 and the vibration of the mover 20 is stopped (that is, in the reference stationary state), thrust in the X-axis direction by the leaf springs 41X and 42X (hereinafter referred to as X-axis machine) Thrust (or mechanical thrust in the X-axis direction) is balanced, and thrust in the Z-axis direction by the leaf springs 41Z ₁ , 41Z ₂ , 42Z ₁ and 42Z ₂ (hereinafter referred to as Z-axis mechanical thrust or Z-axis direction mechanical thrust). In equilibrium, the center of the mover 20 is located at the origin O.

By applying an alternating excitation current to the coil 31, a magnetic thrust that vibrates the mover 20 in the X-axis direction (hereinafter referred to as X-axis magnetic thrust or X-axis magnetic thrust) is generated. The mover 20 vibrates in the X-axis direction according to the X-axis mechanical thrust. The X-axis magnetic thrust is a thrust generated by a magnetic action between the magnetic field generated in the stator 30 by passing an exciting current through the coil 31 and the permanent magnets 21 and 22. When the mover 20 is vibrating in the X axis direction, the main housing of the vibration generator 1 is also vibrated in the X axis direction.
Similarly, by applying an alternating excitation current to the coil 32, a magnetic thrust that vibrates the mover 20 in the Z-axis direction (hereinafter referred to as a Z-axis magnetic thrust or a magnetic thrust in the Z-axis direction) is generated. The mover 20 vibrates in the Z-axis direction according to the magnetic thrust and the Z-axis mechanical thrust. The Z-axis magnetic thrust is a thrust generated by the magnetic action between the magnetic field generated in the stator 30 and the permanent magnets 21 and 22 by passing an exciting current through the coil 32. When the mover 20 vibrates in the Z-axis direction, the main housing of the vibration generator 1 also vibrates in the Z-axis direction.

Hereinafter, each of the leaf springs 41X and 42X or a generic name of them may be referred to as an X-axis spring. Similarly, each of the leaf springs 41Z ₁ , 41Z ₂ , 42Z _1, and 42Z ₂ , or a generic name of them may be referred to as a Z-axis spring.

FIG. 10 is a cross-sectional view of the mover 20 and the stator 30 along the XY coordinate plane. In FIG. 10, a portion denoted by reference sign YOKE represents a yoke portion that forms a stator yoke of the stator 30. In FIG. 10, B ₁ and B ₂ are spring symbols corresponding to the function of the X-axis spring. When a current in the first direction is passed through the coil 31, an N pole is generated on the negative side of the X axis and an S pole is generated on the positive side of the X axis in the stator 30, as shown in FIG. At this time, since the N pole of the permanent magnets 21 and 22 and the N pole of the stator 30 repel each other, the N pole of the permanent magnets 21 and 22 and the S pole of the stator 30 attract each other. Generates an X-axis magnetic thrust force that is directed in the positive direction of the X-axis. Conversely, when a current in the second direction opposite to the first direction is passed through the coil 31, an S pole is generated on the negative side of the X axis and an N pole is generated on the positive side of the X axis in the stator 30. Therefore, an X-axis magnetic thrust force that causes the mover 20 to face in the negative direction of the X-axis is generated. Accordingly, the movable element 20 can be vibrated in the X-axis direction by supplying an alternating excitation current to the coil 31.

FIG. 11 is a cross-sectional view of the mover 20 and the stator 30 along the YZ coordinate plane. In FIG. 11, a portion denoted by reference sign YOKE represents a yoke portion that forms a stator yoke of the stator 30. In FIG. 11, B _{3 to} B ₆ are spring symbols corresponding to the function of the Z-axis spring. When a current in the first direction is passed through the coil 32, an N pole is generated on the negative side of the Z axis and an S pole is generated on the positive side of the Z axis in the stator 30, as shown in FIG. At this time, since the N pole of the permanent magnets 21 and 22 and the N pole of the stator 30 repel each other, the N pole of the permanent magnets 21 and 22 and the S pole of the stator 30 attract each other. Z-axis magnetic thrust is generated to make the direction of the Z-axis in the positive direction. Conversely, when a current in the second direction opposite to the first direction is passed through the coil 32, an S pole is generated on the negative side of the Z axis and an N pole is generated on the positive side of the Z axis in the stator 30. Therefore, a Z-axis magnetic thrust force that causes the mover 20 to face in the negative direction of the Z-axis is generated. Therefore, by supplying an alternating excitation current to the coil 32, the mover 20 can be vibrated in the Z-axis direction.

FIG. 12 shows the relationship between the frequency of the alternating voltage applied to the coil 31 and the amount of displacement of the mover 20 in the X-axis direction. When examining the relationship of FIG. 12, a sinusoidal AC voltage having an amplitude of 0.5 V (volt) was applied to the coil 31. The mover 20 vibrates in the X-axis direction using the resonance of the X-axis spring, and from the mechanical characteristics of the vibration generator 1 (including the mechanical characteristics of the X-axis spring, the weight of the weight body 23, etc.). The resonance frequency in the X-axis direction is determined. When the frequency of the AC voltage applied to the coil 31 matches the resonance frequency in the X-axis direction, a large amount of displacement is obtained in the X-axis direction.
FIG. 13 shows the relationship between the frequency of the AC voltage applied to the coil 32 and the amount of displacement of the mover 20 in the Z-axis direction. When examining the relationship of FIG. 13, a sinusoidal AC voltage having an amplitude of 0.5 V (volts) was applied to the coil 32. The mover 20 vibrates in the Z-axis direction using the resonance of the Z-axis spring, and from the mechanical characteristics of the vibration generator 1 (including the mechanical characteristics of the Z-axis spring, the weight of the weight body 23, etc.). The resonance frequency in the Z-axis direction is determined. When the frequency of the AC voltage applied to the coil 32 coincides with the resonance frequency in the Z-axis direction, a large amount of displacement is obtained in the Z-axis direction.
For example, the resonance frequency in the X-axis or Z-axis direction can be set to a frequency (about 150 Hz) that can be easily detected by the human body.

  As described above, the movable element 20 can be vibrated in the X-axis or Z-axis direction by supplying an excitation current only to the coil 31 or only to the coil 32 among the coils 31 and 32. However, the current supply unit 2 in FIG. 1 can simultaneously supply the excitation current to both the coils 31 and 32. If excitation current is supplied to both the coils 31 and 32, the mover 20 can be vibrated along the W-axis direction by the mechanical thrust in the X-axis and Z-axis directions and the magnetic thrust in the X-axis and Z-axis directions. . When the mover 20 vibrates in the W-axis direction, the main housing of the vibration generator 1 also vibrates in the W-axis direction. Here, the W axis is an axis different from the X axis and the Z axis. However, since the W axis is a composite axis of the X axis and the Z axis, it is located on the ZX coordinate plane.

  As described above, when generating vibrations in a plurality of directions using a conventional vibration generator, it is necessary to prepare as many vibration generators as the number of vibration directions, which increases the size of the entire system. On the other hand, in the present embodiment, a stator having a plurality of coils with different winding directions is disposed between a pair of magnets with opposed magnetic poles (a pair of permanent magnets 21 and 22 in the present embodiment). The mover having the magnet pair is supported by an elastic support portion. As a result, vibrations in a plurality of directions can be generated with a very small size. Moreover, the vibration amount in each direction can be controlled independently. An application example of vibration in multiple directions will be described later.

  Further, when the coil is arranged on the mover side, there is a concern about wiring damage due to vibration, but when the coil is arranged on the stator side, wiring damage due to vibration becomes difficult to occur. In addition, by adopting a configuration in which the mover is arranged outside the stator, the size of the mover can be increased, and as a result, a larger amount of vibration can be obtained under a defined size constraint. It becomes. Further, by adopting the structure as described with reference to FIG. 8 for the elastic support portion 40, the elastic support portion 40 including the X-axis spring and the Z-axis spring can be realized in a small size. .

<< Second Embodiment >>
A second embodiment of the present invention will be described. FIG. 14 is an overall configuration diagram of a vibration system according to the second embodiment. The vibration system according to the second embodiment includes a vibration generator 101, a current supply unit 2, and a vibration control unit 3.

  FIG. 15 is a schematic block diagram of the configuration of the vibration generator 101. The vibration generator 101 includes a main casing 110, a mover 120, a stator 130, and an elastic support portion 140, and the mover 120, the stator 130, and the The vibration generator 101 is formed by installing the elastic support portion 140.

  FIG. 16 is an external perspective view of the vibration generator 101 with the main housing 110 removed (that is, an external perspective view of the mover 120, the stator 130, and the elastic support portion 140). However, in FIG. 16, the springs 141 to 144 forming the elastic support portion 140 are indicated by simple spring symbols.

  The mover 120 includes four permanent magnets 121 to 124, weight bodies 125 and 127, and a mover yoke 126. The weight bodies 125 and 127 are weights for setting the mass of the mover 120 to a desired mass. The weight body 125 is formed by providing a hole for arranging the permanent magnets 121 to 124 and the stator 130 in a rectangular parallelepiped (rectangular plate-like) weight. Permanent magnets 121 to 124 are arranged at predetermined positions of holes provided in the weight body 125. In FIG. 16, a region filled with dots corresponds to the mover yoke 126. The mover yoke 126 is a square-shaped magnetic body joined to the weight body 125 so as to surround the outer periphery of the weight body 125 along the XY coordinate plane. The weight body 127 is a square-shaped weight joined to the mover yoke 126 so as to surround the outer periphery of the mover yoke 126 along the XY coordinate plane. The weight body 127 can be deleted from the mover 120.

  The stator 130 includes a stator yoke 133 having a substantially rectangular parallelepiped shape and two coils 131 and 132. The coils 131 and 132 are wound around the stator yoke 133 so that the central axis of the coil 131 is parallel to the X axis and the central axis of the coil 132 is parallel to the Y axis. That is, the coil 131 is a winding wound around the X axis, and the coil 132 is a winding wound around the Y axis. As the stator 130, the stator 30 according to the first embodiment can be used. In this case, the coils 31 and 32 of the stator 30 function as the coils 131 and 132 of the stator 130, and the stator yoke of the stator 30 functions as the stator yoke 133 of the stator 130. However, when the stator 30 is used as the stator 130, unlike the first embodiment, the stator 30 as the stator 130 is arranged so that the central axes of the coils 31 and 32 are parallel to the X axis and the Y axis, respectively. It arrange | positions inside the needle | mover 120. FIG.

  If no current is supplied to the coils 131 and 132, the mover 120 stops at the reference position. A state where the mover 120 is stationary at the reference position is referred to as a reference stationary state.

  FIG. 17 is a plan view of the mover 120 and the stator 130 in the reference stationary state as seen from the Z-axis direction. In FIG. 17, a region filled with dots corresponds to the mover yoke 126, and a region filled with diagonal lines corresponds to the weight body 125. In the reference stationary state, the Z axis passes through the center of the mover 120 and also passes through the center of the stator 130. The centers of the mover 120 and the stator 130 are assumed to coincide with the centers of gravity of the mover 120 and the stator 130, respectively. The center of the stator 130 can be placed at the origin O. In the reference stationary state, the center of the mover 120 is located at the origin O.

  The permanent magnet 121, the stator 130, and the permanent magnet 122 are arranged in the holes of the weight body 125 in this order along the X-axis direction, and the permanent magnet 123, the stator 130, and the permanent magnet 124 are arranged in this order. It arrange | positions in the hole of the weight body 125 along the Y-axis direction. As described above, in the vibration generator 101, the mover 120 is arranged outside the stator 130 (in other words, the stator 130 is arranged inside the mover 120). The direction from the origin O toward the permanent magnet 121 is the positive direction of the X axis, and the direction from the origin O toward the permanent magnet 122 is the negative direction of the X axis. It is assumed that the direction from the origin O to the permanent magnet 123 is the positive side direction of the Y axis, and the direction from the origin O to the permanent magnet 124 is the negative side direction of the Y axis. Each of the permanent magnets 121 to 124 is a substantially rectangular parallelepiped permanent magnet.

In the permanent magnet 121, the direction from the S pole surface where the S pole exists to the N pole surface where the N pole exists matches the direction from the positive side of the X axis toward the origin O along the X axis. In the permanent magnet 122, the direction from the S pole surface where the S pole exists to the N pole surface where the N pole exists matches the direction from the negative side of the X axis to the origin O along the X axis.
In the permanent magnet 123, the direction from the S pole surface where the S pole exists to the N pole surface where the N pole exists matches the direction from the origin O toward the positive side of the Y axis along the Y axis. In the permanent magnet 124, the direction from the S pole surface where the S pole exists to the N pole surface where the N pole exists matches the direction from the origin O toward the negative side of the Y axis along the Y axis.
Thus, the permanent magnets 121 to 124 are fixed to the weight body 125 and the mover yoke 126 so that the north poles of the permanent magnets 121 and 122 face each other and the south poles of the permanent magnets 123 and 124 face each other. Is done.

  The S pole surface of the permanent magnet 121, the S pole surface of the permanent magnet 122, the N pole surface of the permanent magnet 123, and the N pole surface of the permanent magnet 124 are in contact with the mover yoke 126 at different positions. A magnetic circuit via the yoke 126 is formed. In each of the permanent magnets 121 to 124, the positional relationship between the N pole and the S pole can be reversed.

  The stator 130 is fixed to the main housing 110 via a spacer or the like (not shown). On the other hand, the mover 120 vibrates with reference to the position of the stator 130. This vibration is realized using the elastic support portion 140.

  The elastic support portion 140 is a portion that supports the mover 120 using an elastic body so that the relative positional relationship between the mover 120 and the stator 130 is variable, and is formed from springs 141 to 144 as elastic bodies. (See FIG. 16). The shapes and characteristics of the springs 141 to 144 are arbitrary. Each of the springs 141 to 144 may be a leaf spring as described in the first embodiment, or may be a spring made of a spiral metal wire.

  As shown in FIG. 16, each end of the springs 141 to 144 is coupled to the side surface of the mover 120 (more specifically, the weight body 127). Of the side surfaces of the mover 120, the side surface parallel to the YZ coordinate plane and positioned on the positive side of the X axis, the side surface parallel to the YZ coordinate plane and positioned on the negative side of the X axis, and the ZX coordinate plane One end of each of springs 141, 142, 143, and 144 is coupled to a side surface that is parallel and located on the positive side of the Y axis, and a side surface that is parallel to the ZX coordinate plane and located on the negative side of the Y axis. ing. On the other hand, the other end of the spring 141 and the other end of the spring 142 are fixed to opposing inner walls (not shown) of the main housing 110 so that the expansion / contraction direction of the springs 141 and 142 is the X-axis direction. The other end of the spring 143 and the other end of the spring 144 are fixed to opposing inner walls (not shown) of the main housing 110 so that the expansion / contraction direction is the Y-axis direction.

  When the spring 141 contracts, the spring 142 extends and the mover 120 moves in the positive direction of the X axis. Conversely, when the spring 141 extends, the spring 142 contracts and the mover 120 moves in the negative direction of the X axis. When the spring 143 contracts, the spring 144 extends and the mover 120 moves in the positive direction of the Y axis. Conversely, when the spring 143 extends, the spring 144 contracts and the mover 120 moves in the negative direction of the Y axis.

  The current supply unit 2 in FIG. 14 individually supplies excitation current to the coils 131 and 132 by applying a sinusoidal or rectangular wave AC voltage to the coils 131 and 132 individually. The vibration control unit 3 in FIG. 14 controls the current supply unit 2 to determine whether or not to apply an AC voltage to the coils 131 and 132, the magnitude and frequency of the AC voltage to be applied to the coils 131 and 132, and the like. It can be controlled for each coil.

  When no exciting current is passed through the coils 131 and 132 and the vibration of the mover 120 is stopped (that is, in the reference stationary state), thrust in the X-axis direction by the springs 141 and 142 (hereinafter referred to as X-axis mechanical thrust). Or the Y axis direction thrust (hereinafter referred to as Y axis mechanical thrust or Y axis direction mechanical thrust) by the springs 143 and 144 is balanced, and the center of the mover 120 is Located at origin O.

By applying an alternating excitation current to the coil 131, a magnetic thrust that vibrates the mover 120 in the X-axis direction (hereinafter referred to as an X-axis magnetic thrust or an X-axis magnetic thrust) is generated. The mover 120 vibrates in the X-axis direction according to the X-axis mechanical thrust. The X-axis magnetic thrust is a thrust generated by a magnetic action between the magnetic field generated in the stator 130 by passing an exciting current through the coil 131 and the permanent magnets 121 to 124. When the mover 120 is vibrating in the X-axis direction, the main housing 110 of the vibration generator 101 also vibrates in the X-axis direction.
By passing an alternating excitation current through the coil 132, a magnetic thrust that vibrates the mover 120 in the Y-axis direction (hereinafter referred to as Y-axis magnetic thrust or Y-axis magnetic thrust) is generated. The mover 120 vibrates in the Y-axis direction according to the Y-axis mechanical thrust. The Y-axis magnetic thrust is a thrust generated by a magnetic action between the magnetic field generated in the stator 130 by flowing an exciting current through the coil 132 and the permanent magnets 121 to 124. When the mover 120 is vibrating in the Y-axis direction, the main housing 110 of the vibration generator 101 also vibrates in the Y-axis direction.

  FIG. 18 is a cross-sectional view of the mover 120 and the stator 130 along the XY coordinate plane. When a current in the first direction is passed through the coil 131, an N pole is generated on the positive side of the X axis and an S pole is generated on the negative side of the X axis in the stator 130, as shown in FIG. At this time, since the S pole of the permanent magnets 123 and 124 and the S pole of the stator 130 repel each other, the S pole of the permanent magnets 123 and 124 and the N pole of the stator 130 attract each other. Since the N pole of the magnet 121 and the N pole of the stator 130 repel each other and the N pole of the permanent magnet 122 and the S pole of the stator 130 attract each other, the mover 120 is directed in the positive direction of the X axis. An X-axis magnetic thrust is generated. Conversely, when a current in the second direction opposite to the first direction is passed through the coil 131, an S pole is generated on the positive side of the X axis and an N pole is generated on the negative side of the X axis in the stator 130. Therefore, an X-axis magnetic thrust force that causes the mover 120 to face in the negative direction of the X-axis is generated. Therefore, the movable element 120 can be vibrated in the X-axis direction by supplying an alternating excitation current to the coil 131.

  FIG. 19 is also a cross-sectional view of the mover 120 and the stator 130 along the XY coordinate plane. When a current in the first direction is passed through the coil 132, an S pole is generated on the positive side of the Y axis and an N pole is generated on the negative side of the Y axis in the stator 130, as shown in FIG. At this time, the N poles of the permanent magnets 121 and 122 and the N pole of the stator 130 repel each other, while the N poles of the permanent magnets 121 and 122 and the S pole of the stator 130 attract each other. Since the S pole of the magnet 123 and the S pole of the stator 130 repel each other, the S pole of the permanent magnet 124 and the N pole of the stator 130 attract each other, so that the mover 120 is directed in the positive direction of the Y axis. A Y-axis magnetic thrust is generated. Conversely, when a current in the second direction opposite to the first direction is passed through the coil 132, an N pole is generated on the positive side of the Y axis and an S pole is generated on the negative side of the Y axis in the stator 130. Therefore, a Y-axis magnetic thrust that causes the mover 120 to face in the negative direction of the Y-axis is generated. Therefore, the movable element 120 can be vibrated in the Y-axis direction by supplying an alternating excitation current to the coil 132.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. That is, vibrations in a plurality of directions can be generated with a very small size. Further, in the vibration generator 101, since the number of permanent magnets contributing to the vibration of the mover is larger than that of the vibration generator 1, it is possible to obtain a larger amount of vibration than that of the vibration generator 1.

  It is to be noted that the provision of the mover yoke 126 facilitates obtaining a large magnetic thrust because the magnetic circuit using the mover yoke 126 is formed, but the mover yoke 126 can be deleted from the mover 120. It is. In this case, the mover yoke 126 may be replaced with a weight body.

<< Third Embodiment >>
A third embodiment of the present invention will be described. FIG. 20 is an overall configuration diagram of a vibration system according to the third embodiment. The vibration system according to the third embodiment includes a vibration generator 201, a current supply unit 2, and a vibration control unit 3.

  FIG. 21 is a schematic block diagram of the configuration of the vibration generator 201. The vibration generator 201 includes a main casing 210, a mover 220, a stator 230, and an elastic support portion 240, and the mover 220, the stator 230, and the The vibration generator 201 is formed by installing the elastic support portion 240.

  FIG. 22 is an external perspective view of the vibration generator 201 with the main casing 210 removed (that is, an external perspective view of the mover 220, the stator 230, and the elastic support portion 240). However, in FIG. 22, the spring forming the elastic support portion 240 is indicated by a simple spring symbol.

  The permanent magnets 121 to 124 and the mover yoke 126 provided on the mover 220 are the same as those provided on the mover 120 of the second embodiment. Further, the positional relationship between the XYZ coordinate system in the mover 220 and the permanent magnets 121 to 124 and the mover yoke 126 is the same as that in the mover 120. However, the mover 220 does not have a yoke corresponding to the mover yoke 125 (see FIG. 16), and is provided with a weight body 127 '. In FIG. 22, the hatched area corresponds to the weight body 127 '. The weight body 127 ′ is coupled to the mover yoke 126 so as to cover a part of the outer periphery of the mover yoke 126. Furthermore, as shown in FIG. 22, a part of the weight body 127 ′ can be arranged at a portion where the outer periphery of the mover yoke 126 does not exist.

  The stator 230 is the same as the stator 130 of the second embodiment, and includes coils 131 and 132 and a stator yoke 133, as in the stator 130. The positional relationship between the coil 131, the coil 132, and the stator yoke 133 and the XYZ coordinate system is the same for the stators 130 and 230. Therefore, the central axes of the coils 131 and 132 of the stator 230 are parallel to the X axis and the Y axis, respectively. Further, the positional relationship between the mover 220 and the stator 230 is the same as the positional relationship between the mover 120 and the stator 130 of the second embodiment. Therefore, similarly to the second embodiment, in the vibration generator 201, the mover 220 is disposed outside the stator 230 (in other words, the stator 230 is disposed inside the mover 220. Become).

  Similarly to the second embodiment, if no current is supplied to the coils 131 and 132, the mover 220 is stationary at the reference position. A state where the mover 220 is stationary at the reference position is referred to as a reference stationary state. In the reference stationary state, the Z-axis passes through the center of the movable element 220 and also through the center of the stator 230. The centers of the mover 220 and the stator 230 are assumed to coincide with the centers of gravity of the mover 220 and the stator 230, respectively. The center of the stator 230 can be placed at the origin O. The center of the mover 220 is located at the origin O in the reference stationary state. In the vibration generator 201, the method of determining the magnetic poles of the permanent magnets 121 to 124 is also as described in the second embodiment.

  The stator 230 is fixed to the main housing 210 via a spacer or the like (not shown). On the other hand, the mover 220 vibrates with reference to the position of the stator 230. This vibration is realized using the elastic support portion 240.

  The elastic support portion 240 is a portion that supports the mover 220 using an elastic body so that the relative positional relationship between the mover 220 and the stator 230 is variable, and is the same as the elastic support portion 140 of the second embodiment ( 16) and springs 141 to 144 as elastic bodies. The current supply unit 2 and the vibration control unit 3 in the third embodiment are the same as those in the second embodiment. Accordingly, the vibration generator 201 can generate vibration in the X-axis direction and vibration in the Y-axis direction, similarly to the vibration generator 101.

  In addition, as long as there is no contradiction, the description in the second embodiment (including the description of the springs 141 to 144 and the description of the generation of vibration caused by supplying the exciting current to the coils 131 and 132 (FIGS. 18 and 19)) is the present embodiment. Also applies to form. In this application, the vibration generator 101, the main casing 110, the mover 120, the stator 130, the elastic support portion 140, and the weight body 127 in the description in the second embodiment are respectively replaced with the vibration generator 201, the main casing. What is necessary is just to read as the body 210, the needle | mover 220, the stator 230, the elastic support part 240, and the weight body 127 '.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. That is, vibrations in a plurality of directions can be generated with a very small size. Further, in the vibration generator 201, the number of permanent magnets contributing to the vibration of the mover is larger than that of the vibration generator 1, so that it is possible to obtain a larger amount of vibration than that of the vibration generator 1.

<< Fourth Embodiment >>
A fourth embodiment of the present invention will be described. In the fourth embodiment, an application example of the vibration system will be described. FIG. 23 is an external view of a terminal device (mobile terminal) 400 according to the fourth embodiment. The terminal device 400 is an electronic device such as a mobile phone or a portable information terminal. In the following, it is assumed that the terminal device 400 is a mobile phone (the following mobile phone can be read as a terminal device or an electronic device).

  As shown in FIG. 24, the mobile phone 400 includes at least a vibration system 401, a speaker 402, and a main control unit 403. Reference numeral 410 represents a housing of the mobile phone 400. The vibration system 401 is a vibration system according to the first, second, or third embodiment. In the following, it is assumed that the vibration system is the vibration system of the first embodiment for the sake of concrete description. Then, the vibration system 401 includes the vibration generator 1, the current supply unit 2, and the vibration control unit 3 (see FIG. 1). Sound can be output from the speaker 402 by vibrating a diaphragm (not shown) of the speaker 402. The main control unit 403 comprehensively controls the operation of each part in the mobile phone 400 including the vibration system 401 and the speaker 402. The main housing of the vibration generator 1 in the vibration system 401 is fixed to the housing 410 of the mobile phone 400. Therefore, when vibration is generated by the vibration generator 1 in the vibration system 401, the vibration is transmitted to the housing 410 and vibrates the housing 410. When the user holds the housing 410 of the mobile phone 400 by hand, the vibration of the housing 410 is transmitted to the hand. The vibration in the X-axis direction in the vibration generator 1 in the vibration system 401 is transmitted as vibration in the X-axis direction to the housing 410 and the user's hand, and the vibration in the Z-axis direction in the vibration generator 1 in the vibration system 401 is the housing. 410 and the user's hand as vibration in the Z-axis direction.

  The main control unit 403 can vibrate the vibration generator 1 in the vibration system 401 so as to vibrate the housing 410 of the mobile phone 400 when receiving an incoming call or receiving an e-mail. On the other hand, the main control unit 403 can use the vibration system 401 to vibrate a diaphragm (not shown) of the speaker 402. Specifically, for example, the casing 410 of the mobile phone 400 is vibrated by the vibration of the vibration generator 1 in the X-axis direction, and the diaphragm (not shown) is vibrated by the vibration of the vibration generator 1 in the Z-axis direction. Sound can be output from the speaker 402. In this case, depending on the vibration of the vibration generator 1 in the Z-axis direction, the Z-axis is such that the casing 410 of the mobile phone 400 does not vibrate (so that the vibration of the vibration generator 1 in the Z-axis direction is not perceived by the user). The amount of vibration of the vibration generator 1 in the direction may be determined.

  In the conventional mobile phone, it was necessary to prepare a vibration generator for case vibration and a vibration generator for speaker separately. However, if the mobile phone 400 as described above is formed, the case vibration is generated. The vibration generator for the speaker and the vibration generator for the speaker can be combined into one. Needless to say, this contributes to miniaturization and cost reduction of the mobile phone.

  Further, the mobile phone 400 may be equipped with a dynamic navigation function. The dynamic navigation function is used when a user who has the mobile phone 400 is guided to a destination.

  A specific usage example will be described. A user who uses the dynamic navigation function inputs a destination to the mobile phone 400. Then, the user carries the mobile phone so that the ZX coordinate plane defined for the vibration generator 1 matches the horizontal plane, the positive side of the Z axis matches the front of the user, and the positive side of the X axis matches the right side of the user. Hold phone 400 in hand. The mobile phone 400 can recognize the current location of the mobile phone 400 by receiving a GPS signal sent from a GPS (Global Positioning System) satellite, and can also detect the current location from the GPS signal or information recorded in advance. Get map information around.

  Now, it is assumed that the current location of the mobile phone 400 is a point A and the target location input to the mobile phone 400 is a point B. The main control unit 403 determines a traveling direction necessary for the user to reach the point B from the information on the current location and the map information. Simply, for example, when there is no obstacle between points A and B, if the point B is located on the positive side of the Z axis when viewed from the user at the point A, the traveling direction is the user's forward direction. If the point B is located on the positive side of the W axis when viewed from the user at the point A, the traveling direction is determined to be the diagonally forward right direction of the user. Here, the W axis is assumed to be an intermediate axis between the X axis and the Z axis. When the traveling direction is the user's forward direction, the main control unit 403 vibrates the vibration generator 1 in the Z-axis direction, and when the traveling direction is the user's right diagonal forward direction, the main control unit 403 generates the vibration. The device 1 is vibrated in the W-axis direction.

  The vibration of the vibration generator 1 is transmitted to the housing 410 of the mobile phone 400. Therefore, for example, if the vibration generator 1 vibrates in the X-axis direction, the casing 410 of the mobile phone 400 also vibrates in the X-axis direction, and if the vibration generator 1 vibrates in the W-axis direction, the casing of the mobile phone 400 410 also vibrates in the W-axis direction.

  The user senses the vibration direction of the housing 410 by hand and proceeds in the sensed direction. While it is not desirable in terms of safety to walk while looking at the display screen of the mobile phone 400, a user using the dynamic navigation function can reach the destination intuitively and safely without looking at the display screen of the mobile phone 400. can do. The dynamic navigation function is also beneficial for visually impaired users.

<< Deformation, etc. >>
The specific numerical values shown in the above description are merely examples, and as a matter of course, they can be changed to various numerical values. As annotations applicable to the above-described embodiment, notes 1 to 4 are described below. The contents described in each comment can be arbitrarily combined as long as there is no contradiction.

[Note 1]
In each of the embodiments described above, the winding directions of the plurality of coils provided on the stator are orthogonal to each other, but the winding directions of the plurality of coils may not be orthogonal to each other (in other words, a plurality of coils The central axes of the coils do not have to be orthogonal to each other). That is, for example, when the central axis of the coil 31 of the vibration generator 1 is the X axis, the central axis of the coil 32 of the vibration generator 1 does not necessarily have to be the Z axis, but an intermediate axis between the X axis and the Z axis, etc. It may be. When the central axis of the coil 32 of the vibration generator 1 is different from the Z axis, the elastic support portion 40 is described above so that the elastic body in the elastic support portion 40 expands and contracts in the direction corresponding to the central axis direction of the coil 32. It may be modified from. The same applies to the vibration generators 101 and 201.

[Note 2]
In the vibration generator 1 of the first embodiment, one set of magnet pairs with magnetic poles facing each other is provided. In the vibration generator 101 or 201 of the second or third embodiment, two sets of magnet pairs with magnetic poles opposed to each other are provided. Although provided, the present invention is not limited to this. That is, three or more pairs of magnets with the magnetic poles opposed to each other may be provided in the vibration generator. When three or more pairs of magnets with magnetic poles opposed to the vibration generator are provided, the number of coils provided on the stator (the number of coils having different winding directions) is set to 3 or more in accordance with the number of sets. May be.

[Note 3]
In the above-described vibration generator 101 (see FIGS. 16 and 18, etc.), the expansion and contraction direction of the springs 141 to 144 is parallel to the direction of the central axis of the coil 131 or 132, but the former direction and the latter direction are You may deform | transform the attachment position and attachment direction of the springs 141-144 so that it may not become parallel. The springs 141 to 144 in which the attachment position and the attachment direction have been changed are indicated by reference numerals 141 a to 144 a for convenience. An example of the springs 141a to 144a is shown in FIG. FIG. 25 is a cross-sectional view (cross-sectional view along the XY coordinate plane) of the mover 120 and the stator 130 of the vibration generator 101 having the springs 141a to 144a.

  In FIG. 25, springs 141a, 143a, 142a, and 144a are arranged in the first, second, third, and fourth quadrants on the XY coordinate plane, respectively. One end of each of the springs 141a and 142a is coupled to the side surface of the mover 120 (the corner of the side surface of the mover 120 in FIG. 25) so that the expansion / contraction direction of the springs 141a and 142a is parallel to the direction of the U-axis. At the same time, the other ends of the springs 141a and 142a are fixed to opposing inner walls (not shown) of the main casing 110 (see FIG. 15). On the other hand, one end of each of the springs 143a and 144a is coupled to the side surface of the movable element 120 (the corner of the side surface of the movable element 120 in FIG. 25) so that the expansion / contraction direction of the springs 143a and 144a is parallel to the V-axis direction. In addition, the other ends of the springs 143a and 143a are fixed to opposing inner walls (not shown) of the main housing 110 (see FIG. 15). The U axis is an intermediate axis between the X axis and the Y axis, and the V axis is an axis orthogonal to the U axis and the Z axis. However, the direction from the origin O to the first quadrant of the XY coordinate plane is the positive direction of the U axis, and the direction from the origin O to the second quadrant of the XY coordinate plane is the positive direction of the V axis. Suppose that

  When the spring 141a contracts, the spring 142a extends and the mover 120 moves in the positive direction of the U axis. Conversely, when the spring 141a extends, the spring 142a contracts and the mover 120 moves in the negative direction of the U-axis. When the spring 143a contracts, the spring 144a extends and the mover 120 moves in the positive direction of the V-axis. Conversely, when the spring 143a extends, the spring 144a contracts and the mover 120 moves in the negative direction of the V-axis.

  When no exciting current is passed through the coils 131 and 132 and the vibration of the mover 120 is stopped (that is, in the reference stationary state), thrust in the U-axis direction by the springs 141a and 142a (hereinafter referred to as U-axis mechanical thrust). Or the thrust in the V-axis direction by the springs 143a and 144a (hereinafter referred to as the V-axis mechanical thrust or the mechanical thrust in the V-axis direction) is balanced, and the center of the mover 120 is Located at origin O.

  As described above, the magnetic thrust in the X-axis direction can be generated by flowing an exciting current through the coil 131, and the magnetic thrust in the Y-axis direction can be generated by flowing an exciting current through the coil 132. Accordingly, if the excitation current to be supplied to the coils 131 and 132 is set appropriately and the excitation current is supplied to the coils 131 and 132 at the same time, the magnet 120 vibrates in the U-axis direction. Thrust (hereinafter referred to as U-axis magnetic thrust or U-axis direction magnetic thrust) or magnetic thrust that vibrates the mover 120 in the V-axis direction (hereinafter referred to as V-axis magnetic thrust or V-axis direction magnetic thrust) is generated. It is possible. Each of the U-axis magnetic thrust and the V-axis magnetic thrust is a thrust generated by a magnetic action between the permanent magnets 121 to 124 and a magnetic field generated in the stator 130 by passing an exciting current through the coils 131 and 132. In the configuration of FIG. 25, the mover 120 can be vibrated in the U-axis direction by the U-axis magnetic thrust and the U-axis mechanical thrust generated by simultaneously supplying an appropriate excitation current to the coils 131 and 132. The mover 120 can be vibrated in the V-axis direction by the V-axis magnetic thrust and the V-axis mechanical thrust generated by simultaneously supplying an appropriate excitation current to 132.

  Although the mounting position and mounting direction of the springs 141a to 144a for setting the vibration direction of the mover 120 to the U-axis or V-axis direction have been described, the mounting position and mounting direction of the springs 141a to 144a can be changed further to make the movable element 120 movable. It is also possible to make the vibration direction of the child 120 different from the U-axis or V-axis direction. The above description of the springs 141a to 144a is also applicable to the third embodiment (see FIG. 22).

[Note 4]
Although the embodiment in which the vibration generator according to the present invention is mounted on the terminal device 400 (see FIGS. 23 and 24) such as a mobile phone has been described above, the vibration generator according to the present invention is not limited to the terminal device 400, and is optional. It can be mounted on other devices.

DESCRIPTION OF SYMBOLS 1, 101, 201 Vibration generator 2 Current supply part 3 Vibration control part 11 Upper case 12 Lower case 13, 14 Case connection member 15 Spacer 20, 120, 220 Movable element 21, 22, 121-124 Permanent magnet 23, 125, 127 Weight body 126 Movable yoke 30, 130, 230 Stator 31, 32, 131, 132 Coil 33 Central yoke 34, 35 Gap yoke 36-39 Yoke 133 Stator yoke 40, 140, 240 Elastic support portion 41, 42 leaf spring fixing part _{41X, 41Z 1, 41Z 2,} 42X, 42Z 1, 42Z 2 leaf springs 141-144 spring 400 terminal device 410 housing

Claims (9)

A magnet portion having one or more pairs of magnets with opposed magnetic poles;
A magnetic body disposed between a plurality of magnets forming the magnet part;
A plurality of coils wound around the magnetic body so that winding directions are different from each other;
An elastic support part that supports the magnet part using an elastic body so that the relative positional relationship between the magnet part and the magnetic body is variable, and
A vibration generator characterized by generating vibrations in a plurality of directions different from each other using a magnetic action of a magnetic field generated by supplying currents independently to the plurality of coils and the magnet unit. While the magnetic body and the plurality of coils form a stator fixed to the main housing of the vibration generator,
The vibration generator according to claim 1, wherein the magnet unit forms a mover that vibrates based on a position of the stator. The vibration generator according to claim 2, wherein the mover is disposed outside the stator. The elastic support portion includes a first elastic body that expands and contracts in a first direction, and a second elastic body that expands and contracts in a second direction different from the first direction,
The vibration generator vibrates the mover in the first direction using the magnetic action and the thrust of the first elastic body, and causes the mover to vibrate using the magnetic action and the thrust of the second elastic body. The vibration generator according to claim 2 or 3, wherein the vibration generator vibrates in the second direction. The elastic support portion further includes an elastic body fixing portion coupled to one end of the first elastic body and one end of the second elastic body,
The vibration generator according to claim 4, wherein the other end of the first elastic body is coupled to the mover and the other end of the second elastic body is coupled to the main housing. The plurality of coils include a first coil having a central axis parallel to the first direction and a second coil having a central axis parallel to the second direction,
The vibration generator vibrates the mover in the first direction by using a magnetic action between the magnetic part generated by supplying a current to the first coil and the magnet unit and a thrust of the first elastic body. The movable element is vibrated in the second direction by using a magnetic action of the magnetic field generated by supplying a current to the second coil and a thrust of the second elastic body. The vibration generator according to claim 4 or 5. 7. The vibration generator according to claim 2, wherein current is supplied to the plurality of coils simultaneously to vibrate the mover in a direction different from the central axis direction of each coil. . As a pair of magnets with the magnetic poles opposed to each other, the magnet portion includes first and second pairs,
The opposing magnetic poles in the first pair are identical poles and the opposing magnetic poles in the second pair are identical poles;
The magnetic poles facing each other in the first pair and the magnetic poles facing in the second pair, one is an N pole and the other is an S pole. The vibration generator according to any one of the above. The elastic support portion includes a first elastic body that expands and contracts in a first direction, and a second elastic body that expands and contracts in a second direction different from the first direction,
The plurality of coils include a first coil having a central axis parallel to the first direction and a second coil having a central axis parallel to the second direction,
In the first pair, the magnetic poles face each other in the first direction,
In the second pair, the magnetic poles face each other in the second direction,
The vibration generator vibrates the mover in the first direction by using a magnetic action between the magnetic part generated by supplying a current to the first coil and the magnet unit and a thrust of the first elastic body. The movable element is vibrated in the second direction by using a magnetic action of the magnetic field generated by supplying a current to the second coil and a thrust of the second elastic body. The vibration generator according to claim 8.

Images