JPH0865990A - Vibration actuator - Google Patents

Abstract

PURPOSE: To provide a small-sized vibration motor at a low cost, in relation to a vibration actuator. CONSTITUTION: A vibration actuator is so configured that in a case 2, a magnet movable body 3 made of a permanent magnet which is borne at least one point in a swinging way and a coil 4 which generates magnetic fields against the magnet movable body 3 in succession from at least three directions at a predetermined timing are provided respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration actuator, and more particularly to a vibration generating actuator for converting its own rotational motion and precession motion into vibration.

BACKGROUND OF THE INVENTION In recent years, with the development of communication, pagers which send a message to a target party using radio waves transmitted from a wireless station have been rapidly spread.

A pager is a mobile communication system that informs the other party that a message has arrived by sending a tone signal or simple data wirelessly, and is a typical call-only type. Inside, the number display type,
There are various types such as a card type and a wristwatch type.

When a pager receives a message,
In the past, it was general to notify that a message was addressed to oneself by a ringing tone, etc., but assuming that the usage situation where ringing by sound is not preferable is assumed, there is also one that notifies the reception by vibration instead of sound. Many are provided.

As described above, a vibration source is indispensable for a pager which performs reception notification by vibration, and a small vibration actuator is required in order to reduce the size of the pager.

[0006]

2. Description of the Related Art Conventionally, a vibration motor having an eccentric weight has been generally used as a vibration actuator used in a pager for making a reception notification by vibration.

FIG. 16 is a perspective view showing the appearance of a conventional vibration motor 101.

In FIG. 16, a vibration motor 101 is composed of a motor case 102, a shaft 103, and an eccentric weight 104.

The vibration motor 101 is a small-diameter cylindrical coreless motor for the purpose of eliminating cogging torque, and the vibration motor 101 is constituted by a motor case 102.

As the field magnet used in the vibration motor 101, for example, a rare earth magnet such as samarium cobalt or neodymium is used.

The shaft 103 is a rotary shaft of the vibration motor 101, and is provided with an eccentric weight 104, which is mainly composed of tungsten and has a substantially fan-shaped cross section, at the tip thereof.

In the above structure, when a pager signal is received by the pager, power supply current is supplied to the vibration motor 101, the shaft 103 serving as the rotation axis of the vibration motor 101 rotates, and the shaft 103 also rotates.
The eccentric weight 104 starts to rotate eccentrically with the rotation of, and a whirling force is generated by the eccentric weight 104.

Then, the whirling force of the eccentric weight 104 generates a vibrating force in a direction perpendicular to the rotation axis or in a direction parallel to the rotation axis.
The pager owner is notified of the incoming call as a vibration.

By the way, since the pager is required to be thin (diameter of the rotating portion) and to obtain a large whirling force, a rare earth magnet having a high magnetic flux density is used.

[0015]

However, in such a conventional vibration motor, due to the demand for miniaturization,
Since the rare earth magnet is used as the field magnet and the eccentric weight 104 containing tungsten as a main component with a high specific gravity is used to enhance the whirling force, there are problems as described below.

That is, as shown in FIG. 16, the motor case 102 of the vibration motor 101 is required to be thin, and the vibration motor 101 is supported along the thin surface side. It is necessary to make a part of the vibration motor 101 thin, for example, as shown by the width t in FIG. 16, or to make it a small-diameter cylindrical shape. For this reason, it has been judged that the advantage of using a field magnet that can obtain a large magnetic force density with a small amount for cost reduction even if the cost is high, and an expensive rare earth magnet such as samarium cobalt is used. It was used, and there was a problem that the cost was not reduced.

Generally, the whirling force is the eccentric weight 10
4 specific gravity, radius cubed, length, s of sector angle θ in FIG.
in θ / 2, which is proportional to the square of the rotation speed.

That is, in the example shown in FIG. 16, the eccentric weight 1
The radius of 04 must be within the dimension of the width t, which naturally limits the radius dimension. Therefore, conventionally, in order to increase the whirling force even if the cost becomes high, it is judged that the advantage of using the eccentric weight 104 made of a metal having a high specific gravity is greater, and expensive tungsten is the main component. The eccentric weight 104 which is used is
Similar to the above-mentioned field magnet, there is a problem that cost reduction has not been achieved.

Therefore, in order to obtain the high-performance vibration motor 101, conventionally, expensive materials have been used for the field magnet and the eccentric weight 104, which causes a problem of high cost.

[Object] In view of the above problems, an object of the present invention is to provide a small-sized vibration actuator at low cost.

[0021]

According to a first aspect of the present invention, as shown in FIG. 1, a magnet movable element 3 is made of a permanent magnet and is swingably supported at at least one point in a case 2. By providing the magnet mover 3 with the coil 4 that sequentially generates a magnetic field at a predetermined timing from at least three directions, the above object is achieved.

In this case, in addition to the invention described in claim 1, in the invention described in claim 2, the coil 4 has at least three phases which are wound obliquely with a predetermined inclination with respect to the cylindrical axis. The winding coils 4A, 4B, and 4C are formed by winding coils 4A, 4B, and 4C, and the winding coils 4A, 4B, and 4C of each phase are arranged around the end of the magnet mover 3 with a predetermined gap and wound with a predetermined angle. It is effective to be turned.

In this case, the invention described in claim 3 is the same as the invention described in claim 1, and the coil 4
Is composed of at least three-phase winding coils 4a, 4b, 4c, and the winding coils 4a, 4b, 4c of each phase are spaced apart from the swing support point P of the magnet movable element 3 by a predetermined gap. It is effective to generate the magnetic field from the directions inclining with respect to the magnet movable element 3 by a predetermined angle.

Further, in this case, the invention described in claim 4 is attached to the magnet mover 3 as shown in FIG. 7 in addition to the invention described in claim 1, 2 or 3 described above. In the cup-shaped commutator 13 in which the electrode 12 and the contact are divided into three or more, it is effective to provide a mechanism for performing a rotational movement having an inclination with respect to the central axis and sequentially generating a magnetic field from at least three directions.

Further, in this case, the invention described in claim 5 is, in addition to the invention described in any one of claims 1 to 3 or 4, described above, as shown in FIG.
Connects one end of the support member 5 made of an elastic member to the swing support point P (P ′) of the magnet mover 3 and connects the other end of the support member 5 to the fixed support point O ( It is preferable to be swingably supported by connecting to O ').

Then, in this case, the invention described in claim 6 is the same as the invention described in claim 5 described above, and in addition to FIG.
As shown in (a), the magnet mover 3 has one fixed support point O (O ') to a plurality of swing support points P1 to P1.
It is effective that the plurality of supporting members 5A to 5C (5A 'to 5C') connected to 3 (P1 'to P3') are swingably supported.

Further, in this case, the invention described in claim 7 is the same as the invention described in claim 5 described above, and FIG.
As shown in FIG. 4, the magnet movable element 3 includes a plurality of support members connected from a plurality of fixed support points O1 to O3 (O1 'to O3') to one swing support point P (P '). 5a
It is effective to be swingably supported by ~ 5c (5a'-5c ').

Further, in this case, the invention described in claim 8 is, in addition to the invention described in any one of claims 1 to 4 or 5, the magnet mover 3 as shown in FIG. 14 (c). Is the swing support point P of the magnet mover 3.
(P ') and the fixed support point O (O') inside the case 2 of the support member 5 are effectively supported by the rotating shaft 6 and the bearing 7 so as to be swingable.

In this case, the invention described in claim 9 is, in addition to the invention described in any one of claims 1 to 7 or claim 8,
As shown in FIGS. 15B and 15C, it is preferable to provide a field pole 8 that generates a magnetic field with respect to the magnet mover 3 to restrict the swinging motion of the magnet mover 3.

According to the invention described in claim 10, in addition to the invention described in claim 5, 6 or 7, the supporting member 5 is made of rubber, a spring, a leaf spring, or these. It is effective to be configured by a combination.

[0031]

According to the first aspect of the invention, the coils are sequentially excited from at least three directions based on the timing of the electronic circuit while maintaining a predetermined synchronization, so that the rotating magnetic field is generated from each coil at a rotation cycle. The magnet mover that is generated and swingably supported at at least one point inside the case swings, and a vibrating force is generated.

As a result, the desired vibration can be obtained without using an expensive eccentric weight, so that the cost can be reduced, and since the rotating part is not exposed, the degree of freedom in the arrangement of parts is increased and the design range is expanded. At the same time, a small vibration actuator can be obtained.

According to the invention described in claim 2, in addition to the invention described in claim 1, the magnet mover is arranged with a predetermined gap around the ends thereof and is wound at a predetermined angle with respect to each other. The magnetic field generated by the at least three-phase obliquely wound winding coil causes the magnet mover to perform precession with the swing support point as a fulcrum, and a predetermined vibration force is obtained.

According to the invention described in claim 3,
In addition to the invention described in claim 1, at least three-phase winding coils are arranged at a predetermined distance from the swing support point of the magnet mover at an outward position, and each coil has a predetermined angle with respect to the magnet mover. Due to the magnetic field generated from the inclined direction, the magnet mover performs precession movement with the swing support point as a fulcrum, and the air gap can be set small structurally compared with the invention according to the above-mentioned claim 2. Therefore, in this case, a larger predetermined vibration force is obtained.

Further, according to the invention described in claim 4, in addition to the invention described in claim 1, 2 or 3, the electrode and the contact are provided in a cup-shaped commutator divided into three or more parts. Due to this, a rotational movement having an inclination with respect to the central axis is performed, and a magnetic field is sequentially generated from at least three directions.

Further, according to the invention described in claim 5, in addition to the invention described in any one of claims 1 to 3 or 4, the fixed supporting point inside the case and the magnet mover are supported by a supporting member. The swing support point is connected, and the magnet mover is swingably supported.

According to the invention described in claim 6, in addition to the invention described in claim 5, a plurality of support members are used to change from one fixed support point to a plurality of swing support points. Since they are connected, the amplitude of the swing motion of the magnet mover is regulated within a desired range by adjusting the elastic coefficient of each support member.

In this case, according to the invention described in claim 7, in addition to the invention described in claim 5, a plurality of supporting members are provided to fix one swing supporting point from a plurality of fixed supporting points. By connecting the elastic members to each other, the swing support point of the magnet mover is restricted to a certain range by adjusting the elastic coefficient of each support member.

Further, in this case, according to the invention described in claim 8, in addition to the invention described in any one of claims 1 to 4 or 5, the swinging of the magnet mover is achieved by the rotating shaft and the bearing. The dynamic support point is regulated within a certain range, and is swingably supported.

Further, in this case, according to the invention described in claim 9, in addition to the invention described in any one of claims 1 to 7 or 8, the field magnetic pole causes the swinging motion of the magnet mover. The amplitude is regulated and the motion response is improved.

In this case, according to the invention described in claim 10, in addition to the invention described in claim 5, 6 or 7, any one of rubber, spring and leaf spring is used as the supporting member. Or, since it is configured by a combination of these, a support member that makes the best use of the features of each member is formed.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment 1 of the present invention will be described below with reference to FIGS. Note that, in FIGS. 1 to 8, the same parts in each figure are denoted by the same reference numerals.

First, the configuration of this embodiment will be described.

1 and 2 are sectional views showing a schematic structure of the vibration actuator 1 of the present embodiment. FIG. 1 is a vertical sectional view of the vibration actuator 1, and FIG. 2 is AA 'of FIG.
It is a line sectional view.

1 and 2, the vibration actuator 1 of this embodiment is roughly composed of a case 2, a magnet mover 3, a coil 4, and a support member 5.

The case 2 is a metal housing case and has a magnet mover 3, a coil 4 and a support member 5 inside.

The magnet mover 3 is a donut-shaped anisotropic permanent magnet composed of a rare earth magnet such as a neodymium magnet (NdFeB system magnet) and a samarium cobalt magnet (SmCo system magnet). The perforated portion has a support member 5 described later.
Is arranged. Further, yokes 3a and 3b are provided on both sides of the magnet mover 3.

As shown in FIG. 3A, the coil 4 is formed by winding the winding coils 4A, 4B and 4C on a cylindrical base material. For example, the winding coil 4A is shown in FIG. b)
As shown in, the winding is performed at an angle of θ1 of 10 ° to 30 °.

FIG. 4 shows a winding coil 4A for the coil 4.
FIG. 5 is a diagram for explaining the winding state of FIG. 5, and FIG. 5 is a diagram for explaining the winding state of the coil 4.

In the example shown in FIG. 4, by using two lead wires in total, a total of six lead wires, the winding coils 4A, 4
Although the phases are shifted by 2 / 3π on the same peripheral surfaces of B and 4C, respectively, in the example shown in FIG.
The phase is shifted by 2 / 3π by shifting the winding positions of B and 4C.

As shown in FIGS. 4 (a) and 5 (a), the winding coil 4A is wound obliquely with respect to the coil 4 with respect to the axial direction of the cylinder as the base material. In the example shown in FIGS. 4A and 4B, the winding coil 4A is wound in a state where the phase is shifted by 2 / 3π with respect to the winding coils 4B and 4C.

Here, when the elliptical major axis direction of a certain effective surface in the coil is obliquely wound with respect to the axial direction of the cylinder as the base material, aa ', and 2 / 3π phase shift is made bb',
Furthermore, the major axis of the ellipse with the phase shifted by 2 / 3π is c-
Assuming c ′, the developed views are shown in FIG. 4 (b) and FIG.
As shown in (b).

In this case, the coil 4 can also be formed by deforming the coils 4 wound perpendicularly to the base cylinder axis to give an inclination, and then combining them.

FIG. 6 is a diagram showing a winding method of the coil 4 to be produced, FIG. 6 (a) is a development view for explaining the winding method, and FIG. 6 (b) is a winding method. 3 is a three-dimensional view for explaining FIG.

A cylindrical base material is rotated 180 ° from one end position (see 1 in FIG. 4) and wound to the other end position (see 2 in FIG. 4), and further in the same rotation direction. Rotate 180 ° (see 3-4 in FIG. 4) and wind up to 1 ′ in FIG. Similarly, the winding of 2'-3'-4 'is performed over the entire circumference.

Next, the lead wire at the beginning of winding and the lead wire at the end of winding are connected to form I-1 (see FIG. 4 (a)).
Two lead wires are provided at a position wound from I-1 up to 2 / 3π to form I-2, and a lead wire I-3 is provided at a position wound up to 2 / 3π to provide I-2. Wind up to -1.

In this case, I-1 and I-2, I-2 and I-
3, I-3 and I-1 are connected, and the others are not connected.

As a result, the one-phase coil magnetic fluxes, which are obliquely wound from I-1 to I-2, are combined, as shown in FIG.
A magnetic flux having an inclination is generated with respect to the horizontal plane of the coil shown in (a).

Similarly, the magnetic fluxes of I-2 and I-3 are 2
The phase is shifted by / 3π, and a magnetic flux having an inclination with respect to the horizontal plane of the coil shown in FIG. 6A is generated. In addition, I-
The same applies to 3 and I-1.

Magnet mover 3 disposed inside this
When I-1 and I-2 are energized, the mover shaft is moved to I-
1, I-2 are shifted toward the center, and I-2 and I-3, I-
Similarly, when 3 and I-1 are energized, the center axes of the mover are likewise deviated toward the center directions of I-2 and I-3, and I-3 and I-1, respectively.

The support member 5 is a spring made of stainless steel, and both ends of the support member 5 are fixed to the spring fixed contacts O and O ', and the magnet mover 3 is also provided.
The upper and lower end surfaces of the upper and lower ends are fixed to the spring rocking contacts P and P '. That is, the magnet movable element 3 formed in a donut shape is swingably supported with the spring-shaped support member 5 penetrating therethrough.

Next, the operation (action) of this embodiment will be described.

FIG. 7 is a sectional view showing the commutator 14. In FIG. 7, 11 is an insulating portion made of an elastic member, 12 is an electrode serving as a brush, 13 is a conductive portion, and 14 is a commutator.

In the initial state, the electrode 12 is connected to the conductive portion 13 in the commutator 14, and when the vibration actuator 1 is switched on by an external signal, the conductive portion 13 causes aa ', b-b. The exciting coil of either ', cc' is energized.

When energized in the aa 'direction, when magnetized in the direction perpendicular to the aa' coil phase plane, the magnet mover 3 is shown in FIG. 8 (a). Thus, tilting about the swing support point with respect to the aa 'direction,
The segment A in the commutator 14 is touched.

In this case, the electrode 12 is electrically connected to all terminals of the respective coil terminals (aa ', bb', cc 'coils), and the segment A is connected to the bb' coil. B is the cc 'coil and segment C is a
It is connected to the end of the a'coil.

When the electrode 12 comes into contact with the segment A and is energized, the bb 'coil is excited and tilted about the swing support point, and the electrode 12 is energized to the segment B.

When the segment B is energized, the cc 'coil is excited, the swing support point is tilted, the electrode 12 contacts the segment A, and the cc' coil is excited.

By repeating the above, the electrode 1
2 moves in contact with A-B-C-A in the commutator 14, and a pestle-like motion is performed, and as a result, it vibrates in the circumferential direction and a precession motion is performed.

In this case, the period and vibration width of the mover are the size of the electrode 12, the size of the commutator 14, the positional relationship between the segments A, B and C and the coil phase, the effective surface within the coil, and the angle of the oblique winding. It can be changed according to the size.

In addition, by energizing the electronic circuit, a
By applying a rotating magnetic field to the a ', bb', and cc 'coils, the magnet movable element 3 oscillates in the circumferential direction to perform precession.

As a result, instead of the conventional vibration caused by the eccentric weight, by transmitting this simple vibration to the case 2,
A vibration source for calling is obtained.

FIG. 9 is a vertical cross-sectional view of the vibration actuator 1 which is an alternative to FIG.

In the vibration actuator 1 according to this embodiment, since the magnet movable element 3 performs precession movement,
Although the outer periphery of the magnet mover 3 is formed to have a rounded shape, in the embodiment shown in FIG. 9, the coil 4 is rounded to match the shape of the magnet mover 3.

The coil 4 in this embodiment is formed by using a flexible member as the base material of the coil 4, winding the winding coil as usual, and then applying pressure to deform the base material. Obtainable.

As a result, the distance between the coil 4 and the magnet mover 3 is kept substantially constant even if the magnet mover 3 performs a precession movement.

FIG. 10 is a schematic sectional view for explaining the support position of the spring, which is the support member 5.

The support member 5 in the above embodiment is shown in FIG.
As shown in (a), both ends are fixed to the spring fixed contacts O and O ′, and the upper and lower end surface portions of the magnet movable element 3 are fixed to the spring rocking contacts P and P ′ to form a donut shape. The spring-shaped supporting member 5 is oscillatably supported in a state where the magnet-shaped movable member 3 is passed through the magnet moving element 3. The portion fixed to the spring oscillating contacts P and P ′ is shown in FIG. As shown, only one of the upper end surface portion (P) and the lower end surface portion (P ′) of the magnet mover 3 may be provided, and as shown in FIG. The spring oscillating contact P may be fixed at only one position.

That is, in the case of the examples shown in FIGS. 10 (b) and 10 (c), there is only one fixing point.
Compared with the embodiment shown in (a), the rocking regulation force is inferior, but the mounting becomes easier.

A preferred second embodiment of the present invention will be described below with reference to FIG.
Will be described with reference to. In FIG. 11, the same parts as those in FIGS. 1 and 3 are designated by the same reference numerals.

FIG. 11 is a diagram showing the structure of the coil 4 in the second embodiment. FIG. 11 (a) is a plan view of the coil 4 and FIG. 11 (b) is a schematic sectional view of the coil 4.

In the above-described embodiment, the coil 4 is formed by obliquely winding the three-phase winding coils 4A, 4B, 4C around the base material, but in this embodiment, the coil 4 is formed in the conical base material. The winding coils 4a, 4b, 4c of the phases are arranged at intervals of 120 ° from the center, and further, the base material is arranged from the swing support point P of the magnet mover 3 to the outer side position with a predetermined gap, and The magnetic field is generated from the directions inclined by a predetermined angle with respect to the magnet mover 3.

As a result, although the size of the vibration actuator 1 in the height direction becomes large, the size in the radial direction can be made small, and the vibration actuator 1 having a small diameter can be obtained.

In this case, the winding coils 4A, 4B and 4C shown in FIG. 11 have a triangular shape close to a fan shape so that the coil area can be increased and the magnetic field can be generated more efficiently. However, it may be circular, for example, depending on the shape of the base material.

12 to 14 are views showing an example of the support structure of the magnet mover 3 which is an alternative to the above embodiment.

FIG. 12 is a view showing an example in which a spiral leaf spring is used as the support member 5.

The support member 5 shown in FIG. 12 is composed of a spiral leaf spring, and the outermost peripheral portion is fixed inside the case 2 and the innermost peripheral portion is fixed to the swing support point of the magnet movable element 3. Is.

That is, since the spiral leaf spring connects from the fixed support point at the outermost peripheral portion to the swing support point at the innermost peripheral portion, the swing of the magnet mover 3 is caused by the characteristics of the leaf spring. Support points can be restricted within a certain range.

FIG. 13 is a view showing an example in which a plurality of rubbers having different elastic coefficients are used as the support member 5.

Support member 5 in FIGS. 13 (a) and 13 (b)
Is a plurality of rubber pieces 5A to 5C (5A 'having different elastic coefficients).
.About.5C ') and 5a to 5c (5a' to 5c '), and in the example shown in FIG.
(O ') to a plurality of swing support points P1 to P3 (P1' to P
3 ') is connected to a plurality of rubber pieces 5A-5C (5
A'to 5C ') supports the magnet mover 3 in a swingable manner, so that each rubber piece 5A to 5C (5A' to 5C)
By adjusting the elastic coefficient of C ′), the amplitude of the swing motion of the magnet mover 3 can be regulated within a desired range. By the way, in this example, the rubber piece 5B (5
The elastic modulus of B ') is set to the rubber pieces 5A, 5C (5A', 5
By making the elastic coefficient higher than that of C ′), the swing position of the magnet movable element 3 is restricted from moving.

In the example shown in FIG. 13B, a plurality of fixed support points O1 to O3 (O1 'to O3') are connected to one swing support point P (P '). Rubber piece 5a ~
5 c (5 a ′ to 5 c ′) is swingably supported to adjust the elastic coefficient of each rubber piece 5 a to 5 c (5 a ′ to 5 c ′) so that the swing support point of the magnet mover 3 is constant. It can be restricted to a range. By the way,
In this example, the elastic coefficient of the rubber piece 5b (5b ′) is set to the rubber piece 5
By making it higher than the elastic coefficients of a and 5c (5a ′, 5c ′), the swing position of the magnet mover 3 is restricted from moving, as in the example shown in FIG.

FIG. 14 shows different materials for the support member 5.
It is a figure which shows the example using a structure.

FIG. 14A shows an example in which an elastic member such as rubber is used as the support member 5, and FIG.
Shows an example in which the support member 5 is composed of a thread spring made of, for example, stainless steel or phosphor bronze,
In FIG. 14C, the rotating shaft 6 and the bearing 7 are used as the supporting member 5.
An example configured by

By the way, in the example shown in FIG. 14C, it is provided at the swing support point P (P ′) of the magnet mover 3 and the fixed support point O (O ′) of the support member 5 inside the case 2. By swingably supporting the magnet mover 3 by the rotating shaft 6 and the bearing 7, the swing support point P (P ′) of the magnet mover 3 is swingable while being restricted to a certain range. Can be supported by.

As described above, the material, structure, etc. used for the supporting member 5 can be arbitrarily selected according to the purpose, and may be constituted by a combination thereof.

FIG. 15 is a diagram for explaining the effect when the yoke 3a, 3b and the field pole 8 are provided on the magnet mover 3.

FIG. 15A is a schematic sectional view of the magnet mover 3 provided with the yokes 3a and 3b. In this case, by providing the yokes 3a and 3b, the thickness of the magnet of the magnet mover 3 is increased. Can be increased, and the operating point can be increased.

FIG. 15B is a schematic cross-sectional view in the case where a magnetic material (eg Fe) is provided on the outside of the case 2,
By providing this magnetic body, the response of the magnet mover 3 can be enhanced.

FIG. 15C is a schematic cross-sectional view in the case where a field pole 8 for generating a bias magnetic field is provided for the magnet mover 3, and the magnet mover 3 swings by the bias magnetic field of the field pole 8. The amplitude in exercise can be regulated, and the motion response can be improved.

As described above, in this embodiment, the case 2 is generated by the magnetic field generated by the coil 4 which sequentially generates the magnetic field at a predetermined timing from at least three directions.
It is possible to generate a vibration force by swinging the magnet movable element 3 that swingably supports at least one point therein.

Therefore, the desired vibration can be obtained without using an expensive eccentric weight, so that the cost can be reduced.

Further, because of the structure, the rotating portion is not exposed, so that the degree of freedom in arranging components can be increased and the width of design can be widened.

Although the invention made by the present inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, the magnet used for the magnet mover 3 is not limited to rare earth magnets such as neodymium magnets (NdFeB magnets) and samarium cobalt magnets (SmCo magnets) as in the present embodiment, but ferrite magnets may be used. The magnet material may be used, and the magnet material can be variously changed according to its purpose (that is, a balance between cost reduction and size reduction / power consumption reduction).

Further, the shape of the magnet mover 3 may be, for example, a disk shape or a polygonal shape other than the donut shape of this embodiment.

In the above description, the invention mainly made by the inventor is applied to the vibration actuator which is the field of application which is the background of the invention, but the invention is not limited to this.

For example, it can be applied to a vibration generator for a massage device.

[0108]

According to the invention of claim 1, at least 3
The magnetic field generated by the coil that sequentially generates the magnetic field at a predetermined timing from the direction causes the magnet movable element oscillatingly supported at at least one point in the case to oscillate and an oscillating force can be generated.

Therefore, the desired vibration can be obtained without using an expensive eccentric weight, so that the cost can be reduced, and since the rotating portion is not exposed, the degree of freedom in the arrangement of parts is increased. It is possible to obtain a small vibration actuator while increasing the width of the design.

According to the second aspect of the present invention, the magnetic field generated by at least three-phase obliquely wound winding coils arranged around the end of the magnet mover with a predetermined gap and wound at a predetermined angle with respect to each other. According to the invention, in addition to the invention described in claim 1, the magnet mover performs a precession motion with the swing support point as a fulcrum.
A predetermined vibration force can be obtained.

According to the third aspect of the invention, at least three-phase winding coils are arranged at a predetermined distance from the swing support point of the magnet mover at an outer position, and the coil coils are set to the magnet mover at predetermined intervals. The magnet movable element performs a precession movement around a swing support point as a fulcrum by a magnetic field generated in a direction inclined at an angle.
Compared with the described invention, the air gap can be set to be small structurally, and in this case, a larger predetermined vibration force can be obtained.

Further, in the invention described in claim 4, 3
In the cup-shaped commutator divided or divided, a rotational movement having an inclination with respect to the central axis is performed by the electrodes and the contact points, whereby the above-mentioned claim 1, 2 or 3
In addition to the invention described in, the magnetic field can be sequentially generated from at least three directions.

Further, in the invention described in claim 5, the fixed support point inside the case and the swing support point of the magnet mover are connected by the support member, whereby the above-mentioned claims 1 to 3 or claim. In addition to the invention described in 4,
The magnet mover can be swingably supported.

In the invention described in claim 6, the plurality of support members connect from one fixed support point to the plurality of rocking support points, so that the invention described in claim 5 can be realized. In addition, for example, by adjusting the elastic coefficient of each support member, the amplitude of the swinging motion of the magnet mover can be regulated within a desired range.

In this case, in the invention described in claim 7,
6. The method according to claim 5, wherein a plurality of supporting members connect the plurality of fixed supporting points to one swing supporting point.
In addition to the invention described in (1), for example, by adjusting the elastic coefficient of each support member, the swing support point of the magnet mover can be restricted within a certain range.

Further, in this case, in the invention described in claim 8, in addition to the invention described in any one of claims 1 to 4 and claim 5, the swing support of the magnet mover is provided by the rotating shaft and the bearing. It is possible to swingably support the points while limiting the points to a certain range.

Further, in this case, in the invention described in claim 9, in addition to the invention described in any one of claims 1 to 7 or 8 described above, the amplitude in the swinging motion of the magnet mover is changed by the field pole. It is possible to regulate and improve the operation response.

In this case, in the invention described in claim 10, the support member is made of any one of rubber, spring, leaf spring, or a combination thereof, whereby the above-mentioned claim 5, 6 or In addition to the invention described in claim 7, it is possible to form a support member making the best use of the features of each member.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vibration actuator of this embodiment.

FIG. 2 is a sectional view taken along the line A-A ′ in FIG.

FIG. 3 is a diagram of a coil of this embodiment.

FIG. 4 is a diagram for explaining a winding state of a winding coil around a coil.

FIG. 5 is a diagram for explaining a winding state of a coil.

FIG. 6 is a development view and a three-dimensional view of the winding method of FIG.

FIG. 7 is a cross-sectional view showing a commutator.

FIG. 8 is a diagram for explaining an operation example of the present embodiment.

FIG. 9 is a vertical cross-sectional view of a vibration actuator replacing FIG.

FIG. 10 is a schematic cross-sectional view for explaining a support position of a spring that is a support member.

FIG. 11 is a diagram showing a configuration of a coil according to a second embodiment.

FIG. 12 is a diagram showing an example in which a spiral leaf spring is used as a support member.

FIG. 13 is a diagram showing an example in which a plurality of rubbers having different elastic coefficients are used as a supporting member.

FIG. 14 is a diagram showing an example in which different materials and structures are used as a support member.

FIG. 15 is a diagram for explaining an effect when a yoke and a field pole are provided on a magnet mover.

FIG. 16 is a perspective view showing the appearance of a conventional vibration motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration actuator 2 Case 3 Magnet mover 4 Coil 4A, 4B, 4C Winding coil 4a, 4b, 4c Winding coil 5 Supporting member 5A, 5B, 5C Supporting member 5a, 5b, 5c Supporting member 6 Rotating shaft 7 Bearing 8 Field pole 11 Insulation part 12 Electrode 13 Conductive part 14 Commutator

Claims (10)

[Claims] 1. A magnet mover which is composed of a permanent magnet and is swingably supported at at least one point in a case, and a magnetic field is sequentially generated with respect to the magnet mover at a predetermined timing from at least three directions. A vibration actuator, comprising: 2. The coil is composed of winding coils of at least three phases which are wound obliquely with a predetermined inclination with respect to a cylindrical axis, and the winding coils of each phase are arranged around an end portion of the magnet mover. 2. The vibration actuator according to claim 1, wherein the vibration actuators are arranged with a gap therebetween and are wound at a predetermined angle. 3. The coil is formed of a winding coil of at least three phases, and the winding coils of each phase are arranged at a predetermined gap from a swing support point of the magnet mover to an outer position. 2. The vibration actuator according to claim 1, wherein a magnetic field is generated from a direction inclined by a predetermined angle with respect to the magnet mover. 4. In a cup-shaped commutator in which electrodes and contacts attached to a magnet mover are divided into three or more parts, a rotary motion having an inclination with respect to a central axis is performed,
4. The vibration actuator according to claim 1, further comprising a mechanism that sequentially generates a magnetic field from at least three directions. 5. The magnet mover has one end of a support member made of an elastic member connected to a swing support point of the magnet mover, and the other end of the support member connected to a fixed support point inside the case. 5. The vibration actuator according to claim 1, wherein the vibration actuator is swingably supported. 6. The magnet mover is swingably supported by a plurality of the support members connected from one fixed support point to a plurality of swing support points. The vibration actuator described. 7. The magnet mover is swingably supported by a plurality of support members connected from a plurality of fixed support points to one swing support point. The vibration actuator described. 8. The magnet mover is swingably supported by a rotation shaft and a bearing provided at a swing support point of the magnet mover and a fixed support point inside the case of the support member. The vibration actuator according to claim 1, wherein the vibration actuator is a vibration actuator. 9. The vibration actuator according to claim 1, wherein a field pole for generating a magnetic field is provided to the magnet mover to restrict the swinging motion of the magnet mover. 10. The vibration actuator according to claim 5, 6 or 7, wherein the support member is made of rubber, a spring, a leaf spring, or a combination thereof.