JP2002210411A - Vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator capable of easily widening a resonance frequency band width of a needle. SOLUTION: This vibration generator is provided with a needle 50 mounted with a permanent magnet 70, a stator 10 for forming a magnetic path across the needle 50 by energizing a mounted coil 33 by making a current flow through it, and a pair of elastic supporting members 80, 80 for supporting the needle 50 to be able to vibrate almost in a linear form by attaching one end of a wire material to the needle 50 side and the other end to the stator 10 side. The wire materials composing a pair of the elastic supporting members 80, 80 are made to differ in diameter. Or, each supporting height from the stator 10 of the needle 50 supported by the pair of the elastic supporting members 80, 80 is made to differ from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration generator.

[0002]

2. Description of the Related Art Conventionally, a portable device such as a portable telephone, which is a terminal of a mobile communication device, has a vibration generator housed in the portable device itself or in an accessory of the portable device instead of notifying the incoming call by a ringing tone. In some cases, the vibration generator causes the human body to sense an incoming call by vibrating the vibration generator.

In this type of conventional vibration generator, a rotating body is mounted on a rotating shaft of a motor, and at that time, the center of gravity of the rotating body is set at a position different from the rotating shaft, and the rotating body is rotated. Some have structures that generate vibration.

However, since the vibration generator having such a structure utilizes the vibration of the rotating shaft when rotating the rotating body as vibration, the bearing portion of the rotating shaft of the motor receives severe force, and its durability is increased. And the problem of hindering reliability.

Accordingly, the applicant of the present application has filed an earlier
00-156964), as shown in FIG.
The mover yokes 134, 135 are provided on both end faces of the permanent magnet 136.
And a stator 11 in which a coil 140 is wound around a central yoke 115 provided in a stator yoke 113.
0, and coil springs 150, 150 pivotally supporting the mover 130 with respect to the stator 110, and the stator yoke 113 is excited by the coil 140 to cause the mover 130 to vibrate in a predetermined vibration. A vibration generator 100 configured to vibrate by number is proposed.

In the above-described conventional vibration generator 100, it is necessary to supply a current having a frequency corresponding to the resonance vibration frequency of the mover 130.
The resonance vibration frequency band of the mover is narrow, and the resonance vibration frequency itself fluctuates due to variations in assembly and accuracy errors of parts.Therefore, the frequency of the current supplied one by one must also be adjusted according to this fluctuation of resonance vibration frequency. However, the adjustment work was complicated.

On the other hand, the stator 110 vibrates the mounted member by mounting the mounting surface 117 which is the bottom surface thereof to the mounted member (not shown). Since it is horizontal to the mounting surface 117, the vibration acceleration in the direction perpendicular to the mounting surface 117 is small. However, the vibration in the vertical direction with respect to the mounting surface 117 is more effective than the vibration in the horizontal direction to transmit and sense the vibration to the human body or the like. There was also a drawback that it could not be transmitted to the mounting member.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to easily widen the resonance vibration frequency band of the mover and thereby to increase the frequency of the current supplied. The object of the present invention is to provide a vibration generator which does not need to be adjusted one by one.

Another object of the present invention is to provide a vibration generator capable of effectively generating a vibration acceleration in a direction other than the vibration direction of the mover.

[0010]

In order to solve the above-mentioned problems, a vibration generator according to the present invention faces a movable element having a permanent magnet attached thereto with a predetermined gap from an end face of the movable element. A stator having an end face and forming a magnetic path between the mover and a current by flowing a current through the attached coil, and attaching one end of the wire to the mover side and the other end to the stator side. And a pair of elastic support members for supporting the mover in a substantially linear manner so as to vibrate substantially linearly, wherein the diameters of wires constituting the pair of elastic support members are different from each other.

Further, the vibration generator according to the present invention has a movable element having a permanent magnet attached thereto, and an end face opposed to an end face of the movable element via a predetermined gap, and allows a current to flow through the attached coil. A stator that forms a magnetic path between the movable element and the movable element by exciting the movable element, and supports the movable element so that the movable element can vibrate substantially linearly by attaching one end of the wire to the movable element side and the other end to the stator side. And a pair of elastic support members, each supporting the movable member from a stator with a different height.

Further, the vibration generator according to the present invention has a movable element having a permanent magnet attached thereto, and an end face opposed to an end face of the movable element via a predetermined gap, and allows a current to flow through the attached coil. A stator that forms a magnetic path between the movable element and the movable element by exciting the movable element, and supports the movable element so that the movable element can vibrate substantially linearly by attaching one end of the wire to the movable element side and the other end to the stator side. And a pair of elastic support members, wherein the wire diameters of the wires constituting the pair of elastic support members are different from each other, and the respective support heights of the mover from the stator by the pair of elastic support members. Are characterized by the following.

[0013] Further, according to the present invention, by providing one magnetic pole surface of the permanent magnet so as to face the outer peripheral side surface of the coil attached to the stator, the magnetic flux emitted from the magnetic pole surface of the permanent magnet is reduced by the outer peripheral surface of the coil. A magnetic path is formed, which is guided to be directed to the magnetization direction of the stator by the coil after entering the coil through the side surface.

Further, according to the present invention, the elastic support member may be provided with a coil portion formed by winding a wire in the middle of the wire, with both ends thereof being arm portions, and the end of one arm portion being moved to the mover side by the other arm. The end of the portion is attached to the stator side, and the movable element is constituted by a coil spring which supports the movable element so as to be able to vibrate in the direction of magnetization of the stator by the coil.

[0015]

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

As shown in FIG. 3, the stator 10 comprises a cored coil 30 and two elastic members 4 on a base 20 with terminals.
0 and 40 are attached. The base unit 20 with terminals is formed by molding a base body 21 made of a plate-like synthetic resin material around two metal terminal plates 23 shown in FIG. 4 as shown in FIG. And both terminal boards 2
The connecting portions 231 and 231 provided at the centers of the bases 3 and 23 are exposed at the left and right centers of the upper surface of the base body 21, while the surfaces of the terminal portions 233 and 233 of the terminals 23 and 23 are connected to the base body as shown in FIG. 21 is exposed on the lower surface. On the upper surface of the base body 21, elastic body mounting portions 211 and 211 are provided on both left and right sides thereof, and a concave storage portion 213 for storing the cored coil 30 is provided between the two. Stand body 2
Two spring end fixing portions 217 and 217 each having a small hole are provided at the center of the upper surface in the vicinity of both sides 215 and 215, respectively, and the spring end fixing portions 217 and 217 near the both sides 215 and 215 are provided. Are provided on both sides with spring locking portions 219, 219, respectively.

The cored coil 30 is constructed by winding a coil 33 around a substantially rod-shaped coil core 31 and extending coil ends 35 from both ends of the coil core 31. Here, the coil core 31 is formed of a sintered body of iron in a substantially quadrangular prism shape, and as shown in FIG.
The first end faces 53, 53 are tapered so as to have substantially the same inclination angle as the end faces 53, 53 so as to be parallel to the end faces 53, 53.

The elastic body 40 is made of a thin rubber plate, and is formed in a shape that can be mounted on the elastic body mounting portions 211 and 211 of the base unit 20 with terminals, respectively. These are coil placement units 401, 401.

The stator 10 is assembled by storing the cored coil 30 in the storage portion 213 of the terminal base 20 and fixing it with an adhesive or the like.
5 is exposed on the upper surface of the base unit 20 with terminals.
1 and 231 are connected and fixed by various fixing means such as a low melting point metal, a conductive adhesive and welding, respectively, and the elastic members 40 and 40 are respectively attached to the elastic member mounting portions 211 and 211 of the base unit 20 with terminals. It is performed by placing. The stator 10 has terminal portions 233 and 233 of both terminals 23 and 23.
Is exposed to the lower surface of the base body 21, so that a low-melting-point metal can be directly attached to a circuit pattern on a substrate on which the vibration generator 1 is to be attached by reflow or the like. I have.

Next, as shown in FIGS. 1 to 3, each of the elastic supporting members 80, 80 is a so-called double torsion type coil spring formed by bending a single wire, and is wound about one and a half turns. Two substantially parallel arm portions 83, 83 and arm portions 85, 85 protrude from both sides of each of the two turned coil portions 81, 81, and end portions are provided between the arm portions 83, 83 extending in one direction. (Hereinafter, referred to as a “connecting portion”) 82, and the other arm portions 85, 85 are formed as ends (hereinafter, referred to as “locking ends”) 87, with their distal ends bent downward. .
In the present invention, the pair of elastic support members 8
The wire diameters of the coil springs constituting 0 and 80 are slightly different, and one wire diameter is 0.23 mm and the other wire diameter is 0.26 mm.

FIG. 6 is an exploded perspective view of the mover 50. As shown in the drawing, the mover 50 has a weight 60, a permanent magnet 70, and a high-permeability member (hereinafter, referred to as a "center yoke") 75 attached to a mover yoke 51 made of the same material as the coil core 31. It is configured.

The mover yoke 51 has a substantially quadrangular prism shape (rod shape), and has an arm 5 at each end extending toward the stator 10.
2, 52 are provided, and are formed in a substantially “U” shape as a whole,
The inner surfaces of the arms 52, 52 are connected to the end surfaces 3 of the coil core 31.
L, which are tapered end faces 53 facing each other with a predetermined gap therebetween, and which lock the connecting portions 82 of the elastic support members 80 on both outer side surfaces of the arms 52, 52. Locking portions 55 and 5 formed of cutouts bent in a letter shape
5 is provided.

The weight 60 is made of a non-magnetic material (for example, a molding die containing a non-magnetic heavy metal powder such as tungsten in a molding resin such as nylon) in order to prevent a magnetic path from being formed in the weight 60 portion. It is constituted by. Here, FIG. 7 is a sectional view of the weight 60 shown in FIG. As shown in FIGS. 6 and 7, a storage part 61 in which a permanent magnet 70 is fitted is provided at the center of the weight 60, and a concave part is recessed at an upper part of the storage part 61, and the lower surface and the side surface of the movable element yoke 51 are provided. Is provided with a fitting portion 63 having a size and a shape that fits into the fitting portion 63. That is, the fitting portion 6
3 has a width substantially equal to the width of the mover yoke 51, and the length of the weight 60 in the vibration direction
The fitting portion 63 of the weight 60 is attached to a portion between the arms 52 of the mover yoke 51. When
The weight 60 is configured to be correctly positioned on the mover yoke 51. Notches 65 are provided at four corners of the lower surface of the weight 60. The notch 65 is provided when the movable member 50 vibrates.
Is to prevent collision with the weight 60. Further, as shown in FIG.
The width k) of the direction perpendicular to the vibration direction is slightly larger than the width of the fitting portion 63 and the step portion 68 is provided.
The width is substantially the same as that of the permanent magnet 70. The height of the storage section 61 is substantially the same as the thickness of the permanent magnet 70.

Next, the permanent magnet 70 is a square plate member, and its upper and lower surfaces are configured as SN magnetic poles. The size of the surface of the permanent magnet 70 in the vertical and horizontal directions is substantially the same as the size of the upper surface of the coil 33 in the vertical and horizontal directions.
Is formed so as to cover the upper surface of the.

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

The mover 50 is assembled by inserting the permanent magnet 70 into the housing 61 of the weight 60 with the fitting portion 63 of the weight 60 fitted in the center of the lower surface of the mover yoke 51. Is carried out by attaching a center yoke 75. FIG. 8 is a sectional view of the same part as that of FIG. 7 when assembled. The permanent magnet 70 is attracted to the mover yoke 51 by its strong magnetic force, and the permanent magnet 70 is
The weight 60 is also fixed to the mover yoke 51 by engaging with the armature 8. The center yoke 75 is also attracted and fixed to the permanent magnet 70 by a strong magnetic force. Therefore, it is not necessary to separately fix these members by an adhesive or the like (although an adhesive or the like may be used), and the members can be manufactured simply by combining them. The weight 60 is positioned with respect to the mover yoke 51 by the fitting portion 63, and the permanent magnet 70
Is positioned by the storage portion 61, and the center yoke 75 is attracted so that the center of the surface coincides with the center of the surface of the permanent magnet 70, so that the positioning can be achieved. Therefore, each member pays special attention to the positioning. Even if it is not, positioning between each member can be automatically performed only by combining them.

Next, in order to assemble the vibration generator 1, in FIG. 3, the elastic support members 80, 80 are attached to the spring end fixing portions 217, 217 of the stator 10 to which the cored coil 30 and the elastic members 40, 40 are attached. Insert the locking ends 87, 87,
At the same time, the respective arm portions 85 of the elastic support members 80, 80 are locked to the spring locking portions 219 of the stator 10. Thus, the locking end portions 87, 87 of the elastic support members 80, 80 and the arm portions 8
5 is fixed, the coil portions 81, 81
The elastic support members 80, 80 are securely supported at three points by being slightly pressed against the coil mounting portions 401, 401. Then, the vibration generator 1 shown in FIGS. 1 and 2 is completed by inserting and locking the connecting portions 82, 82 of the elastic support members 80, 80 to the locking portions 55, 55 of the mover 50.

FIG. 9 is a diagram showing a positional relationship between the stator 10 and the mover 50 of the vibration generator 1. As shown in the figure, both end faces 37 of the stator 10 are
The opposing surfaces are configured to be parallel to each other through predetermined gaps 28, 28 (both left and right gap dimensions are the same) with respect to 53. The mover 50 includes elastic support members 80, 80.
Accordingly, the stator 10 is supported so as to be able to vibrate freely in the magnetization direction of the stator 10 by the coil 33 (that is, in the left-right direction in FIG. 9).
At this time, the magnetic pole surface of the permanent magnet 70 on the side where the center yoke 75 is attached is disposed via the gap 27 so as to oppose the outer peripheral side surface of the coil 33, and this opposing surface is configured to be parallel.

The magnetic path of the vibration generator 1 configured as described above enters the coil core 31 from the magnetic pole surface on the side where the center yoke 75 of the permanent magnet 70 is mounted, through the outer peripheral side surface of the coil 33, and in the coil core 31. Coil 33
, And is guided so as to face the magnetization direction of the stator 10 (the direction of the NS magnetic pole, that is, the direction of both end faces 37, 37). 53, mover yoke 5
1 is formed so as to return to the other magnetic pole surface of the permanent magnet 70 again from the center.

The vibration generator 1 is mounted on a circuit board (not shown), and the terminal section 233 of the base section 20 with terminals is brought into contact with a circuit pattern (terminal pattern) provided on the circuit board to lower the vibration generator. It is electrically and mechanically connected and fixed with a melting point metal or the like. Then, the coil 33 from the circuit board side (not shown)
When a predetermined current is supplied to the movable element 50, the mover 50 starts a simple oscillation right and left. Hereinafter, the operation principle will be described.

FIG. 12 is a diagram showing the relationship between the displacement x (mm) of the mover 50 to the left and right and the thrust F (N) acting on the mover 50 in the left and right direction. The positive value of the thrust F indicates the rightward force in FIG. 9, and the negative value indicates the leftward force in FIG. In addition, the positive displacement x indicates a rightward displacement in FIG. 9, and the negative displacement indicates a leftward displacement in FIG. 9. In this embodiment, the dimensions of the gaps 28 (in the horizontal direction)
Is 1.5 mm each.

The circular points indicate the resultant state of the magnetic force of the permanent magnet 70 that does not allow current to flow through the coil 33 and the resilience of the elastic support members 80, 80.
Indicates the state of the resultant force obtained by adding the magnetic force of the permanent magnet 70 and the resilient force of the elastic support members 80 and 80 to the electromagnetic force when a current of NI = + 100 (AT) is applied to the coil 33. When a current of NI = −100 (AT) is applied to the magnetic force of the permanent magnet 70 and the elastic support member 8.
It shows the state of the resultant force obtained by summing the resiliency of 0,80.

As shown in the figure, in any state, the thrust applied to the mover 50 is substantially linear, indicating that the mover 50 is in a state suitable for simple oscillation. ing. The reason for such thrust is as follows.

That is, as shown by the line a in FIG. 13, the thrust by only the elastic support members 80, 80 is a force for linearly returning the mover 50 to the neutral position as the displacement amount increases. On the other hand, as shown by the line b in FIG. 13, the thrust by only the permanent magnet 70 is a thrust in the opposite direction to the thrust of the elastic support members 80, 80. However, when the displacement is small, it hardly works, and the displacement increases. When any of the left and right gaps 28, 28 becomes smaller, the gap 28 rapidly increases toward the smaller one. Therefore, when the two thrusts are combined, a substantially linear thrust is obtained as shown by a circular point in FIG. The permanent magnet 70
The reason that the thrust caused by only the force becomes as shown by the line b in FIG.
This is because both ends 53, 53 of the mover 50 are S poles, so that when the mover 50 is in the neutral position, it is not attracted to either the left or right. However, either end face 53, 53
Is approaching one of the end faces 37, 37 of the stator 10, the thrust to be attracted to the end face increases exponentially. As described above, the thrust by the permanent magnet 70 alone is small near the neutral point. Therefore, even if the elastic force of the elastic support members 80 and 80 is not so large, the movable element 50 is moved to the neutral position when no current flows through the coil 33. Can be easily maintained.

The coil 33 has NI = + 100 (A
T), the left and right end faces 37, 37 of the stator 10
When the NS magnetic pole is excited, the thrust by the permanent magnet 70 and the elastic support members 80, 80 becomes a thrust in a state in which the thrust is moved in a substantially parallel upward direction with a predetermined width as it is, as shown in FIG. That is, at any displacement position, the thrust is larger by a substantially constant displacement than the thrust by the permanent magnet 70 and the elastic support members 80,80. When a current of NI = −100 AT flows, on the contrary, it moves substantially parallel downward.

This is for the following reason. That is, the coil 33
When an NS magnetic pole is generated on both end faces 37, 37 of the stator 10 as shown in FIG.
A repulsive force acts between the end faces 7 and 53, and an attractive force acts between the right end faces 37 and 53. Therefore, a thrust toward the left acts on the mover 50. On the other hand, as the mover 50 moves to the left, the suction force acting between the right end faces 37 and 53 increases, but the repulsive force acting between the left end faces 37 and 53 decreases. Therefore, the thrust for moving the mover 50 to the left as a whole is substantially constant at any position.

In the present invention, still another thrust works. That is, as shown in FIG. 14, the magnetic flux G from the magnetic pole surface of the permanent magnet 70 on the side where the center yoke 75 is attached.
Is guided into the coil 33 through the outer peripheral side surface of the coil 33 so as to face the NS magnetic pole direction of the coil 33 in the coil core 31. Therefore, when a current flows through the coil 33, FIG. 15 (FIG. 15 shows a state where the coil 33 is viewed from the right side shown in FIG. 14. When the NS magnetic pole is formed by the coil 33 as shown in FIG. A current flows in the direction shown in FIG. 15). As shown in Fleming's law, a thrust on the upper side 331 of the coil 33 on the front side of the drawing (that is, rightward in FIG. 335 has no thrust and lower side 337
The thrust on the back side of the paper (that is, the leftward direction in FIG. 14) acts on the
Since the amount of magnetic flux passing through the lower side 337 is very small, a thrust directed rightward in FIG. Since the stator 10 is fixed, a thrust to the left direction acts on the mover 50 due to the reaction. Therefore, in addition to the thrust by the electromagnetic force of the coil 33, the thrust according to Fleming's law is applied in the same direction, so that the overall thrust for driving the mover 50 increases. When a current in the opposite direction flows through the coil 33, the thrust according to Fleming's law is also in the opposite direction. In this embodiment,
Since the center yoke 75 made of a high-permeability material is attached to the magnetic pole surface of the permanent magnet 70 on the side facing the outer peripheral side surface of the coil 33, the magnetic flux can be concentrated on the magnetic pole surface and collected. It can be effectively guided inside through the outer peripheral side surface. Therefore, the thrust according to the Fleming's law increases.

Next, a method of driving the vibration generator 1 will be described. As shown in FIG. 9, when no current is flowing through the coil 33, the elastic support members 80, 80 maintain the mover 50 at the neutral position. Next, a current (NI = −100) is applied to the coil 33.
AT), the end faces 37, 37 of the coil core 31 are supplied.
The NS magnetic pole is excited as shown in FIG.
Are attracted toward the opposite end surface 37 (left direction). This is because the square point in FIG. 12 has a negative thrust at the displacement x = 0 mm. When the direction of the current supplied to the coil 33 is reversed (NI = + 100AT) when the right end face 53 of the mover 50 approaches the opposed end face 37, FIG.
In FIG. 2, the thrust is a triangular point, which is a thrust that pulls the mover 50 in the opposite direction (rightward direction), so that the mover 50 starts to move in the opposite direction.

The reversal of the current is repeated in accordance with the vibration frequency (resonance vibration frequency) of the mover 50, so that both end faces 53, 53 of the mover 30 come into contact with the end faces 37, 37 of the stator 10. , The movable element 50 is reversed (that is, the end faces 37, 37 do not always contact the end faces 53, 53), and the vibration of the movable element 50 can be repeated.

In this embodiment, since the mover 50 is supported by a pair of left and right elastic support members 80, 80,
The movement of the mover 50 can be substantially parallel movement in the left-right direction, and the movement of the end faces 53, 53 of the mover 50 with respect to the end faces 37, 37 of the stator 10 can be substantially parallel movement. The gap 27 between the yoke 75 and the stator 10 also remains substantially constant, so that a stable vibration can be secured with a structure that does not disturb the magnetic circuit.

A current is applied to the coil 33 to draw the mover 50 once to one of the end faces 37, 37, and then the current supply is stopped, so that the mover 50 vibrates at a predetermined resonance frequency. Then, when the vibration is attenuated, the operation of flowing current to the coil 30 to increase the amplitude of the mover 50 and then stopping the current again may be repeated. Also, the current may be supplied in a pulsed manner at other timings. With this configuration, power saving can be achieved.

As described above, in the present invention, the wire diameters of the coil springs forming the pair of elastic support members 80 are different from each other. This is because the band of the resonance vibration frequency of the mover 50 is widened. It is. That is, for example, when the wire diameter of each coil spring constituting the pair of elastic support members 80, 80 is the same 0.23 mm, the bandwidth of the resonance vibration frequency is as shown by the curve a in FIG. It becomes very narrow. This is the same as in the case of the curve b in FIG. 16A showing the case where the wire diameter of each coil spring constituting the pair of elastic support members 80, 80 is the same 0.26 mm. On the other hand, as in the present embodiment, the wire diameter of the coil spring of one elastic support member 80 is 0.23 mm.
When the wire diameter of the coil spring of the other elastic support member 80 is 0.26 mm, as shown by a curve c in FIG. The bandwidth of the 50 resonant oscillation frequencies is considerably wider. Therefore, even if the resonance vibration frequency varies to some extent due to variations in assembly or component accuracy errors, the preset resonance vibration frequency is included in a wide bandwidth, and the coil 3
It is only necessary to set the frequency of the current supplied to 3 to a frequency that matches the preset resonance vibration frequency, and it is not necessary to adjust the frequency of the current one by one.

Since the pair of elastic supporting members 80, 80 used in the above embodiment have the same shape, there is a possibility that the mounting may be mistaken during the assembly. Therefore, for example, if one elastic support member 80 having a wire diameter of 0.26 mm is subjected to glossy nickel plating, and the other elastic support member 80 having a wire diameter of 0.23 mm is subjected to matte nickel plating. In addition, it is preferable that the mounting of the two components is not mistaken during assembly.

On the other hand, in this embodiment, arms 52, 52 extending toward the stator are provided on both sides of the mover 50.
The inner surfaces of the stators 2 and 52 are the end surfaces 53 and 53 facing the both end surfaces 37 and 37 of the stator 10 with a predetermined gap therebetween. And the vibration stabilizes.

FIG. 10 is a diagram showing a structure for fixing the elastic support member 80 to the base 20 with terminals. As shown in the figure, the elastic support member 80 has a portion at the locking end 87, a portion locked by the spring locking portion 219 of the arm portion 85, and a portion at which the coil portion 81 elastically contacts the elastic body 40. 3
Since it is supported at points, its fixation is secure. The end of the elastic support member 80 on the side of the arm 83 swings in the direction of arrow B shown in FIG.
In the present embodiment, since the coil portion 81 is supported by the elastic body 40, the coil portion 81 pushes the elastic body 40 and is slightly pushed down in the direction of the arrow C, whereby the end of the arm 83 side further increases the swing amount. To the position indicated by the dotted line b, whereby the swing stroke of the mover 50 is increased, and more effective vibration can be performed.

In this embodiment, the center yoke 75 is attached to the lower surface of the permanent magnet 70, and the width of the center yoke 75 is made larger than the width of the permanent magnet 70 as shown in FIG. For reasons. That is, when the thickness of the permanent magnet 70 is small as in this embodiment, the magnetic flux does not reach far, as shown in FIG. It does not enter, and wasteful things increase. Also, of the sides 70a to 70d of the permanent magnet 70, the opposite side 70
The lines of magnetic force passing over the portions a and 70c rarely enter the coil core 31 and do not contribute to the vibration of the mover 50. Therefore, by providing a center yoke 75 as shown in FIG. 11B, the shortest distance between the NS magnetic poles is increased, thereby increasing the number of lines of magnetic force incident on the coil core 31, and the center yoke is larger than the width of the permanent magnet 70. 7
5 is increased to reduce the number of lines of magnetic force passing over the sides 70b and 70d to reduce the sides 70a and 70c.
By increasing the number of lines of magnetic force that pass through beyond the portion, the number of lines of magnetic force incident on the coil core 31 is increased, so that the lines of magnetic force of the permanent magnet 70 can be more effectively used for the vibration of the mover 50. It is.

In the above embodiment, as shown in FIG. 9, both end faces 37, 37 of the stator 10 and both end faces 53, 53 of the mover 50 are parallel to each other.
The reason why the inclined tapered surface is widened toward the side is as follows. That is, the magnetic flux has a property of flowing through the shortest distance portions of the gaps 28, 28. At the same time, the magnetic flux density must be reduced to avoid magnetic saturation. Therefore, the opposite end faces are made parallel so that the magnetic flux passes uniformly in the gap 28, and at the same time, the inclined face is used to increase the area of the face, thereby avoiding magnetic saturation and ensuring good vibration. It was made possible. Further, the tapered surface that is inclined so as to expand toward the stator 10 side is configured as described above.
That is, in addition to the force in the direction in which the mover 50 is vibrated, the force in the direction of arrow F, that is, the force to draw the mover 50 toward the stator 10 is exerted. When a strong impact is applied to the vibration generator 1 by dropping a device to which the vibration generator 1 is attached, the heavy movable element 50 may come off the elastic support members 80, 80. Always stator 1
If a magnetic force pulling toward the zero side is applied, there is no danger that the mover 50 will come off the elastic support members 80, 80 even if a strong impact is applied. Therefore, the tapered surface is provided as described above.

In the above embodiment, the permanent magnet is mounted on the surface of the mover yoke facing the stator, and the weight is mounted on the mover yoke at a position surrounding the permanent magnet. The whole vibration generator can be made smaller and thinner than when a weight is attached.

In the above embodiment, since one magnetic pole surface of the permanent magnet is opposed to the stator,
It can be configured in a well-balanced manner with individual permanent magnets.

FIG. 18 is a side view showing a vibration generator 1-2 according to another embodiment of the present invention. The vibration generator 1-2 shown in the figure differs from the vibration generator 1 according to the embodiment in that a pair of elastic support members 80-
This is a point that the support heights of the mover 50 from the stator 10 by 1, 80-2 are made different. That is, the height L-1 of the two elastic support members 80-1, 80-2 from the coil portion 81,
L-2 is different. In this embodiment, the wire diameters of the elastic support members 80-1 and 80-2 are the same.

With the above construction, the mover 50 moves linearly in the horizontal direction with respect to the mounting surface (bottom surface) 25 on the member (not shown) on which the base 20 with terminals of the stator 10 is mounted. It is not just a vibration, but a vibration that combines a linear motion in the horizontal direction and a rocking motion in the rotation direction. Therefore, the vibration transmitted from the mounting surface 25 to the member to be mounted includes not only horizontal vibration of the mounting surface 25 but also vibration in the vertical direction, so that effective vibration acceleration can be transmitted to the member to be mounted. become.

FIG. 19 is a diagram showing the relationship between the vibration frequency and the vibration acceleration of the mover 50, and the vertical axis in FIG.
FIG. 19A shows the vibration acceleration in the horizontal direction, and FIG. 19B shows the vibration acceleration in the vertical direction. And FIG.
The curve e in FIG. 19A and the curve g in FIG. 19B correspond to both elastic support members 80-1 and 80-2 as in the case of the vibration generator 1-2.
19 (a) and the curve h in FIG. 19 (b).
Means both elastic support members 80-1 and 80-2 (wire diameter is the same)
1 shows the same vibration generator supporting height.

As can be seen from FIG. 19A, even if the height of the vibration generator supported by the two elastic support members 80-1 and 80-2 is changed, the vibration acceleration in the horizontal direction is not changed. Almost the same strength is obtained as with the same supporting height, while as can be seen from FIG.
The vibration acceleration in the vertical direction is much higher than that obtained when the vibration generator support height is the same. That is, even if the movable element 50 is vibrated in a tilted state, the vibration acceleration in the vertical direction can be greatly increased while maintaining the vibration acceleration in the horizontal direction, and an effective vibration acceleration is applied to the member to be mounted. Be able to communicate.

In the case of the vibration generator 1-2, the wire diameters of the two elastic support members 80-1 and 80-2 are the same. However, as in the vibration generator 1 shown in FIG. −
1, 80-2 may have different wire diameters. In this case, as shown in FIGS. 20 (a) and 20 (b), the band of the resonance vibration frequency of the mover 50 in the horizontal direction becomes considerably wide as shown by the curve c as described with reference to FIG. . At the same time, as shown in FIGS. 20C and 20D, the band of the resonance vibration frequency of the mover 50 in the vertical direction is also the same as that described with reference to FIG. Are considerably wider as shown by the curve i than when the wire diameters are the same (curves j and k). Therefore, both elastic support members 80-1, 80-1
The wire diameter of the two elastic support members 80-2
If the support height of the mover 50 by -1 and 80-2 is made different, the vertical vibration acceleration can be increased, and at the same time, the horizontal and vertical resonance vibration frequency bands can be widened.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims and the technical idea described in the specification and the drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and effects of the present invention are exhibited.

That is, the shapes, structures, and materials of the components constituting the members such as the stator 10, the mover 50, and the elastic support member 80 can be variously modified. For example, the elastic support member according to the present invention may be applied to the coil springs (elastic support members) 150 of the vibration generator 100 shown in FIG. The shape of the weight 60 and the permanent magnet 70 is
If the shape is such that the mounting position of the permanent magnet 70 with respect to the mover yoke 51 is determined by the weight 60 when 0 is stored in the storage portion 61 of the weight 60 and is attracted to the lower surface of the mover yoke 51. Any shape structure may be used. Further, the shape and structure of the fitting portion 63 provided on the weight 60 may be any shape and structure according to the shape and structure of the mover yoke 51 as long as they are positioned on the mover yoke 51. Further, the vibration generator according to the present invention includes:
It is needless to say that the present invention is not limited to use in a portable device, but can be applied to any device that wants to generate vibration.

[0057]

As described in detail above, the present invention has the following excellent effects. Since the wire diameters of the wires constituting the pair of elastic support members are made different, the resonance vibration frequency band of the mover can be easily widened. Even if the vibration frequency varies, the preset resonance vibration frequency is included in a wide bandwidth, and the current supplied to the coil need only be set to a frequency that matches the preset resonance vibration frequency,
It is no longer necessary to adjust the frequency of each current.

By setting one magnetic pole surface of the permanent magnet to face the outer peripheral surface of the coil, the magnetic flux emitted from the magnetic pole surface of the permanent magnet passes through the outer peripheral surface of the coil and enters the coil, and then is fixed by the coil. Since a magnetic path is formed so as to be directed to the magnetization direction of the armature, when a current is applied to the coil, in addition to the thrust by the electromagnetic force of the coil, the thrust by Fleming's law is applied, and the overall thrust to drive the mover Increase.

Since the support height of the mover from the stator by the pair of elastic support members is made different, the vibration acceleration of the mover in a direction other than the vibration direction can be increased. Effective vibration can be transmitted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vibration generator 1 according to an embodiment of the present invention.

FIG. 2A is a front view of a vibration generator 1, and FIG.
(B) is a side view.

FIG. 3 is an exploded perspective view of the vibration generator 1. FIG.

FIG. 4 is a perspective view of the terminal boards 23;

FIG. 5 is a perspective view of the base unit with terminal 20 viewed from the back side.

FIG. 6 is an exploded perspective view of the mover 50.

FIG. 7 is a sectional view of the weight 60 shown in FIG.

FIG. 8 is a cross-sectional view of the same portion of the mover 50 as in FIG. 7;

FIG. 9 is a diagram showing a positional relationship between a stator 10 and a mover 50.

FIG. 10 is a view showing a fixing structure of an elastic support member 80.

11 (a) and 11 (b) are views for explaining the reason why the center yoke 75 is attached to the permanent magnet 70. FIG.

FIG. 12 is a diagram showing the relationship between the displacement of the mover 50 and the thrust acting on the mover 50.

FIG. 13 shows thrust and elastic support member 8 by permanent magnet 70.
It is a figure which shows the relationship between thrust and displacement by 0,80.

FIG. 14 is a diagram showing a relationship between forces acting on the mover 50.

FIG. 15 is a diagram showing a relationship between forces acting on a coil 33 according to Fleming's law.

16A and 16B are diagrams showing the relationship between the vibration frequency and the vibration acceleration of the mover. FIGS. 16A and 16B are different from the case where the wire diameter of a pair of elastic support members 80 is the same. FIG.

FIG. 17 is a perspective view showing a conventional vibration generator 100.

FIG. 18 is a side view showing a vibration generator 1-2 according to another embodiment of the present invention.

FIG. 19 is a diagram showing the relationship between the vibration frequency and the vibration acceleration of the mover 50 when the mover support heights of the two elastic support members 80-1 and 80-2 are the same and different.

FIG. 20 is a diagram showing the relationship between the vibration frequency and the vibration acceleration of the mover 50 when the wire diameters of the two elastic support members 80-1 and 80-2 are different from each other.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration generator 10 Stator 20 Base part with terminal 21 Base body 217 Spring end fixing part 219 Spring locking part 23 Terminal plate 28 Gap 30 Core coil 31 Coil core 33 Coil 37 End face 40 Elastic body 50 Mover 51 Movable Child yoke 52 Arm 53 End face 60 Weight 70 Permanent magnet 75 High permeability member (Center yoke) 80 Elastic support member 81 Coil 82 End (connection) 83,85 Arm 87 End (locking end) 1 -2 Vibration generator 80-1, 80-2 Elastic support member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 33/16 H02K 33/16 A (72) Inventor Naoki Fukuda 335 Karijuku, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Imperial Communications Within Industrial Co., Ltd. (72) Inventor Katsuhito Matsuhiro 335 Karushijuku, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Imperial Telecommunications Industry Co., Ltd. Terms (reference) 5D107 AA07 AA12 AA14 BB08 CC09 CC10 DD03 DD12 FF07 FF10 5E048 AB10 AC05 AD02 5H633 BB08 GG02 HH03 HH05 JA02

Claims (5)

[Claims] 1. A movable element having a permanent magnet mounted thereon, and an end face opposed to an end face of the movable element with a predetermined gap therebetween. And a pair of elastic support members that support the mover in a substantially linear manner by attaching one end of the wire to the mover side and the other end to the stator side. A vibration generator comprising: a pair of elastic support members each having a different wire diameter. 2. A movable element having a permanent magnet mounted thereon, and an end face opposed to an end face of the movable element with a predetermined gap therebetween, and the movable element is excited by applying a current to a mounted coil to excite the coil. And a pair of elastic support members that support the mover in a substantially linear manner by attaching one end of the wire to the mover side and the other end to the stator side. A vibration generator, wherein the height of the movable member supported by the pair of elastic support members from the stator is made different. 3. A movable element having a permanent magnet mounted thereon, and an end face opposed to an end face of the movable element with a predetermined gap therebetween, and the movable element is excited by supplying a current to a mounted coil to excite the coil. And a pair of elastic support members that support the mover in a substantially linear manner by attaching one end of the wire to the mover side and the other end to the stator side. It is characterized by having different wire diameters of wires constituting the pair of elastic support members, and different support heights of the mover from the stator by the pair of elastic support members. Vibration generator. 4. A magnetic flux emitted from a magnetic pole surface of the permanent magnet is provided through the outer peripheral surface of the coil by disposing one magnetic pole surface of the permanent magnet so as to face an outer peripheral surface of the coil attached to a stator. 4. The vibration generator according to claim 1, wherein a magnetic path is formed so as to be directed to the magnetization direction of the stator by the coil after being incident on the inside. 5. The elastic support member has a coil portion formed by winding a wire in the middle of the wire, and has both sides as arm portions, with one end of the arm portion facing the mover and the other end of the other arm portion. The coil according to claim 1, 2, 3, or 4, wherein the coil spring is configured to support the mover in a direction of magnetization of the stator by the coil by attaching the portion to the stator. Vibration generator.