JPH11280841A - Damping actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit not only the rolling but also the pitching of an existent structure by comprising a damping actuator including an elastic member, the magnetic members holding the same and an electromagnetic converting means acting on these magnetic members, for inhibiting and reducing the vibration of the structure such as a house or the like. SOLUTION: To adapt a damping actuator 10 to a house, the house is jacked up first, and the damping actuator 10 is inserted into a gap between a groundsill and the house. An accelerometer 16 is further installed and connected with a controller 15. The damping actuator 10 is manufactured by mounting the iron plates 11 on the upper and lower parts of the iron powder-mixed vibration- proof rubber 12, and the controlled voltage is applied to both terminals of a coil 13 wound on a central part of this vibration-proof rubber 12, so that the repulsion or attraction is generated between the upper and lower iron plates through the vibration-proof rubber 12 by the magnetic flux 14 generated from the coil 13. The coil 13 is energized and controlled by the controller 15 on the basis of a detected value of the accelerometer 16 when the groundsill is vertically vibrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping actuator for suppressing and reducing the vibration of a structure such as a house, and more specifically, it can positively cut off the transmission of vertical vibration. The present invention relates to a vibration control actuator.

[0002]

2. Description of the Related Art Conventionally, as a vibration damping device for attenuating the roll of a building or a structure due to an earthquake or wind, a vibration control device that detects a vibration acceleration and reciprocates a movable mass in accordance with the vibration damping device has been proposed. Japanese Patent Application Laid-Open No. 5-79223 discloses a vibration damping device that reciprocates a frame containing an additional vibrating body in accordance with the output of a vibration sensor.

Further, as a vibration damping actuator which attenuates vertical vibration by interrupting vibration transmission from a base such as the ground or a floor, a magnetic levitation type cushion body using a magnetic repulsion force as a cushion or a (special). Kaiping 8-14
No. 0782), a seismic isolation device (Japanese Patent Laid-Open No. 9-158532) which attempts to reduce vibrations exerted on a building by rolling a roller ball against a horizontal seismic force and expanding and contracting a spring against a vertical seismic force. Is also known.

[0004]

Such a conventional vibration damping actuator is, for example, in the case of the above-mentioned vibration control device or vibration damping device, an active type having an actuator for positively generating a control force. Therefore, it is possible to suppress various vibrations, but since it is to reduce the roll that occurs on the higher floor of the building, a large mass and its moving space are required, and from the ground There is a drawback that the effect is small with respect to transmitted pitching.

On the other hand, among the above-mentioned magnetic levitation devices and seismic isolation devices, the repulsive force of a magnet and the repulsive force of a spring are applied between a base and an object to be damped. Although the transmission of longitudinal vibration is directly cut off or reduced, the vibration characteristics tend to be fixed because it is a passive type that lacks an actuator that actively generates control force. there were. Also, if the object to be damped is heavy, it is necessary to continuously apply a large force to support it from below, but even in such a situation, a member with a relatively small spring sensitivity that is effective for vibration control Is not only to select from existing products, but also to design and manufacture newly,
It was not easy.

[0006] Therefore, apart from a bed that can be accommodated indoors such as a bed or a house that can be grasped in advance in weight and vibration characteristics such as a newly built house, existing buildings and the like can be controlled by conventional methods. It is difficult to sufficiently attenuate the pitch by simply applying the vibration actuator as it is, but it would be difficult to repeat the trial production of various vibration suppression actuators for each house where the vibration characteristics etc. are not obvious. There was a drawback that standardization and mass production were not possible, and man-hours and costs did not match.

However, for existing structures,
The demand for the installation of damping means is increasing. For example, when the traffic volume of large vehicles suddenly increases due to road maintenance or when a new train passes due to the extension of the railway, etc. It is required to cut off or at least reduce the transmission of vibrations to nearby houses and houses. In such a case, as a practical measure, it is conceivable to insert a vibration damping actuator on a base or the like to cut off the vibration transmitted from the ground to each building. In a vibrating vibration, a longitudinal vibration component is also large.

Therefore, it is an object to devise a vibration damping actuator that can be applied to existing structures whose vibration characteristics are not clear and that can sufficiently suppress vertical swing. The present invention has been made to solve such a problem, and an object of the present invention is to realize a vibration damping actuator that also suppresses vertical swing of an existing structure.

[0009]

The first to fifth solving means invented to solve such a problem are as follows.
The configuration and operation and effect will be described below.

[First Solution] A vibration damping actuator according to a first solution (as described in claim 1 at the time of filing the application) comprises an elastic member, a magnetic member sandwiching the elastic member, and a magnetic member ( And electromagnetic conversion means acting on them by generating a repulsive force or an attractive force acting between them.

In such a vibration-damping actuator according to a first solution, the vibration-damping actuator is inserted between a base such as the ground and an object to be damped such as a house. It is installed so as to be located on the object to be damped and the base side. Then, the rolling, which is a vibration state in which the base and the vibration damping object are shifted laterally, is absorbed and attenuated by the shear deformation of the elastic member. In addition, the steady force in the vertical direction that withstands the weight of the vibration damping target is satisfied by the elastic force of the elastic member. Then, the pitching, that is, the vertical vibration is reduced by the bending and stretching force generated between the magnetic members by the action of the electromagnetic conversion means. In addition, by actively controlling through the electromagnetic conversion means, it is possible to suppress various vibrations having different frequencies and the like.

As a result, the force for controlling the vibration is released from the constant restraint of the supporting force, and the degree of freedom and the margin of control for various longitudinal vibrations are improved. Also, since active control can be performed without a large mass body, even if the vibration characteristics etc. of the target object are not clear, it can be appropriately suppressed to pitching even if it is not clear. Goods will be available. Therefore, according to the present invention,
It is possible to inexpensively realize a vibration damping actuator that also suppresses vertical vibration of an existing structure.

[Second Solution] A vibration-damping actuator according to a second solution (as described in claim 2 at the time of filing the application) has a structure in which a part or all of the elastic member has enhanced magnetic permeability. It is.

In the vibration damping actuator according to the second solution, the magnetic permeability between the magnetic members is large.
The force generated by the electromagnetic conversion also increases. This will enhance the controllable force for reducing longitudinal vibration. Therefore, according to the present invention, it is possible to realize a vibration damping actuator that further suppresses the vertical swing of the existing structure.

[Third Solution] The vibration damping actuator of the third solution (as described in claim 3 at the time of filing the application) is the vibration suppression actuator of the first and second solutions. Further, a part or all of the magnetic member is made permanent magnet.

In the vibration damping actuator according to the third aspect of the present invention, the spring of the elastic member is somewhat limited by the spring sensitivity based on the repulsive force or the attractive force of the permanent magnets generated without being driven from the outside. The sensitivity is adjusted. As a result, the ability to suppress the first impact that is difficult to suppress by active control due to a response delay is improved. Therefore, according to the present invention, it is possible to realize a vibration damping actuator that also effectively suppresses the pitching of an existing structure from the beginning.

[Fourth Solution] The vibration-damping actuator of the fourth solution (as described in claim 4 at the time of filing the application) is the vibration-damping actuator of the first to third solutions. A part or the whole of the elastic member is formed of a bag divided into small chambers.

In the vibration damping actuator according to the fourth solution, the gas in the bag acts as a resilient force, but the gas generally has a larger volume elastic modulus than rubber or the like. For this reason, even when the same steady supporting force is generated, the spring sensitivity is lower than that of an elastic member made of a solid such as rubber. This makes it possible to softly absorb the impact force and to attenuate vibration accompanying expansion and contraction between the magnetic members. In addition, the ability to suppress the first impact that is difficult to suppress by active control due to a response delay is improved. Therefore, according to the present invention, it is possible to realize a vibration damping actuator that more effectively suppresses pitching of an existing structure from the beginning.

[Fifth Solution Means] The vibration suppression actuator of the fifth solution means (as described in claim 5 at the beginning of the application) is the vibration suppression actuator of the first to fourth solution means. And a power generating means based on the displacement of the magnetic member or the elastic member (acting to convert the deformation force into electric power).

In the vibration damping actuator according to the fifth solution, when vibration is transmitted from the outside, the magnetic member or the like is displaced, and electric power is generated by the power generation means based on the displacement. . As a result, it is possible to save a part of the power supplied to the electromagnetic conversion means, or to make the standby power of the control device connected thereto self-sufficient, thereby saving power consumption. Therefore, according to the present invention, it is possible to realize a vibration damping actuator that does not require much running cost even if the pitching of the existing structure is actively suppressed.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment for implementing the vibration damping actuator of the present invention achieved by such a solution will be described.

[First Embodiment] A first embodiment of the present invention is a vibration-damping actuator according to the above-described solving means, which comprises a sensor for detecting vibration, and the electromagnetic sensor according to an output of the sensor. And a control device for controlling the conversion means. This allows the vibration damping actuator to be actively adapted to the vibration state.

[Second Embodiment] A second embodiment of the present invention is the vibration damping actuator according to the first embodiment described above, wherein the sensor and the control unit use the electric power received from the power generation means. A means for operating all or a part of the device is provided. Thereby, power consumption can be saved.

[0024]

First Embodiment A first embodiment of a vibration damping actuator according to the present invention will be described in detail with reference to a schematic vertical sectional view of FIG.

The vibration damping actuator 10 has a size of several cm to
An iron plate 11 is attached to the anti-vibration rubber 12 mixed with iron powder having a thickness of several tens cm from above and below. The iron powder-mixed anti-vibration rubber 12 is prepared by adding iron powder having a high magnetic permeability to a general anti-vibration rubber material to such an extent that rubber characteristics such as elasticity are not impaired, and agitating so that the distribution of components becomes substantially uniform. After being equalized, they are solidified, and all are elastic members with enhanced magnetic permeability.

The iron plate 11 may be made of pure iron, but desirably an alloy containing a component for enhancing magnetism is subjected to rust prevention. In addition, although illustration is omitted, stud bolts are implanted on the upper and lower sides for fastening and tightening when attaching to a base or the like. In addition, the fixing tool for attachment is not limited to the stud bolt, and a locking means such as a hook, an engaging means, an adhesive, and the like may be used alone or in combination. Such an iron plate 11 is a magnetic member sandwiching the elastic member 12 from above and below.

The anti-vibration rubber 12 mixed with iron powder has a central portion cut out in an annular or donut shape, and a coil 13 is wound therearound. Both terminals of the coil 13 are made of anti-vibration rubber 12 mixed with iron powder.
It is sewn inside and pulled out. The coil 13
Is wound up first, and the inside and outside of the rubber vibration isolating rubber 12
May be solidified after injection or addition. In any case, when the control voltage V is applied to both terminals of the coil 13, a current flows through the coil 13, and the magnetic flux 14 generated from the coil 13 reaches the upper and lower iron plates 11 via the iron powder-mixed vibration-proof rubber 12. A repulsive force or attractive force is generated between the iron plates 11 according to the magnetic force. The shape and direction of the coil 13 are determined so that such a magnetic flux 14 is generated according to the control voltage V. Thereby, the coil 13 is connected to the upper and lower magnetic members 1.
This serves as an electromagnetic conversion means acting on the device 1.

The vibration damping actuator 10 includes an accelerometer 16 as a sensor for detecting vibration, and a control device 1 for controlling electromagnetic conversion means according to the output of the sensor.
5 are additionally provided. The accelerometer 16 detects at least a vertical acceleration to detect pitching and sends the acceleration to the control device 15. The sensor may be any sensor that can detect the state of longitudinal vibration, and may be a speedometer or a displacement measuring unit. Control device 15
Has a PID control circuit, etc., performs an operation such as inverting and amplifying the output of the accelerometer 16 and shifting the phase appropriately, generates a control voltage V, and outputs the control voltage V to the coil 13. I have.

The mode of use and operation of the vibration damping actuator of this embodiment will be described with reference to the installation situation diagram of FIG.

In order to apply the vibration damping actuator 10 to a house 5 built on the ground 1 via the base 4, the house 5 is first jacked up and the base 4 and the house 5 are housed.
And a sufficient number of vibration damping actuators 10 are inserted into the gap between the actuators. At that time, a part of the base 4 may be cut out to maintain the height of the house 5 at the original level. then,
The accelerometer 16 is installed, and the control device 15 is connected. At that time, when the accelerometer 16 is installed in the house 5 to be damped, the operation mode of the control device 15 is set to feedback control, but the accelerometer 16 is placed on the ground 1 between the truck 2 of the vibration source and the house 5. When embedded, the operation mode of the control device 15 is set to feed-forward control. Thus, the house 5 is in a state of being supported and built by the vibration damping actuator 10, and preparation for cutting off the vibration transmitted to the existing house 5 is completed.

When the truck 2 or the like passes near the house 5 and the vibration generated from the track 2 propagates on the ground 1 and the shaking reaches the house 5, the base 4 becomes the pitching component 3. Vibrating up and down by the accelerometer 16
The vibration state is detected. The detected value is sent to the control device 15 as needed, and the control device 15 generates a control voltage V according to the detected value and applies it to the coil 13. Then, at the timing when the base 4 is pushed up by the pitching component 3, the distance between the upper and lower iron plates 11 is reduced by the electromagnetic force according to the control voltage V, and at the timing when the base 4 is pulled down by the pitching component 3. The distance between the upper and lower iron plates 11 is increased by the electromagnetic force according to the control voltage V.

In addition, at this time, the degree of expansion and contraction and the period of the accelerometer 1 can be changed even if the magnitude or frequency of the pitching component 3 fluctuates because the vibration source is replaced by a material other than the track 2.
The detection of 6 and the control of the control device 15 ensure that the pitching component 3 is canceled. Thus, even if the ground 1 shakes, the house 5 does not shake much. In addition, although detailed description is omitted, with respect to statically supporting the house 5 in a steady state and reducing the transmission of the roll, the iron powder-mixed anti-vibration rubber 12 is similar to the normal anti-vibration rubber. Will work.

[0033]

Second Embodiment A second embodiment of the vibration damping actuator according to the present invention will be described in detail with reference to a schematic vertical sectional view of FIG. The vibration damping actuator 30 differs from the vibration damping actuator 10 described above in that the vibration damping actuator 30 is of a laminated type and air cooling type.

Since the iron plate 31 instead of the iron plate 11 is inserted in the middle in addition to the upper and lower two sheets to form a laminated shape, the iron powder-mixed vibration-proof rubber 32 instead of the iron powder-mixed rubber 12 is thin. As a result, it is hard to collapse even if it receives the lateral deformation force. Further, a coil 33 instead of the coil 13 is spirally wound and formed flat so as to be easily incorporated, but since the distance between the respective iron plates 31 is narrow,
The magnetic flux 34 sufficiently spreads over the opposing iron plate 31.

Further, the iron plate 31 is made of an anti-vibration rubber 32 mixed with iron powder.
It is wider than it is, and when assembled, its edges protrude significantly. Then, when the vibration energy or magnetic energy changes into heat energy and the temperature rises, air is cooled by releasing heat from the surface of the overhang to the atmosphere. Other operations and usage of the vibration damping actuator 30 are the same as those of the vibration damping actuator 10 described above.

[0036]

Third Embodiment A third embodiment of the vibration damping actuator according to the present invention will be described in detail with reference to a schematic vertical sectional view of FIG. This vibration damping actuator 40 differs from the above-described vibration damping actuator 30 in that the magnetic member is made permanent magnet. That is, a rubber magnet magnetized in the thickness direction (up-down direction) is used for the plate 41 as a magnetic member instead of the iron plate 31.

As an anti-vibration rubber 42 as an elastic member in place of the anti-vibration rubber 32 mixed with iron powder, simple rubber or rubber mixed with a slight amount of magnetic powder is used for emphasizing resilience and deformability. Can be The same coil 43 as the above-described coil 33 is used as the coil 43 as the electromagnetic conversion means for generating the magnetic flux 44. Also in this case, it is used for an existing or newly built house in the same manner as described above.

[0038]

Fourth Embodiment A specific configuration of a fourth embodiment of the vibration damping actuator according to the present invention will be described with reference to a schematic vertical sectional view of FIG. This vibration damping actuator 50 differs from the above-described vibration damping actuator 40 in that rubber magnet plates 51 instead of the plate 41 are alternately magnetized in advance in a spreading direction (horizontal direction). The anti-vibration rubber 52 and the coil 53 may be the same as the anti-vibration rubber 42 and the coil 43 described above. In this case, the distribution state of the magnetic flux 54 changes minutely spatially under the influence of the magnetization state of the plate 51.
The overall operation and the like are the same as described above.

[0039]

Fifth Embodiment A specific configuration of a fifth embodiment of the vibration damping actuator of the present invention will be described with reference to a schematic vertical sectional view of FIG. The vibration damping actuator 60 shown in FIG. 6 differs from the vibration damping actuator 30 shown in FIG. 3 in that a bag body 62 is used as an elastic member in place of the iron powder-containing vibration-proof rubber 32. The iron plate 61 as the magnetic member and the coil 63 as the electromagnetic conversion means may be the same as the iron plate 31 and the coil 33 described above.

The bag body 62 is made of a tough and soft plastic sheet or the like and is divided into a number of airtight small chambers 64, each of which is filled with a gas such as compressed air. The pressure change when the gas is compressed and expanded in each of the small chambers 64 causes the bag body 62 to change.
The resilience of is demonstrated. Again,
Used and operates in much the same way as described above,
The spring sensitivity can be adjusted by changing the air pressure of the small chamber 64.

[0041]

Sixth Embodiment A specific configuration of a sixth embodiment of the vibration damping actuator according to the present invention will be described with reference to a schematic vertical sectional view of FIG. This vibration damping actuator 70 differs from the above-described vibration damping actuator 30 in that an inner cavity 74 is formed in the center / axial portion in order to incorporate a power generation means based on displacement of a magnetic member. Incidentally, an iron plate 71 as a magnetic member and a coil 73 as an electromagnetic conversion means
May be the same as the iron plate 31 and the coil 33 described above.

The upper and lower portions of the lumen 74 reach the respective iron plates 71, and a small permanent magnet 75 and a coil 76 are accommodated therein. Then, these magnets 75 and coils 76
Is maintained in a state where relative movement is possible by an appropriate support member such as a spring, and when the iron plate 71 vibrates, the vibration is transmitted to the magnet 75 or the like, and the magnet 75
It is designed to vibrate inside.

The control circuit 77 of the control device connected to the damping actuator 70 includes a main control circuit for generating a control voltage V for the coil 73 and a means for rectifying the induced current I of the coil 76. And a battery that stores the current, a standby circuit that operates on the power from the battery, and a power switch that switches off and on the power supplied from the commercial power supply to the main control circuit. .

Only when the level of vibration detected by a sensor such as an accelerometer reaches a predetermined value such as a sensitive level or the like, the power switch is turned on according to the control of the standby circuit, and the power supply is turned on. Active control for suppressing vibration is performed. In this way, only the standby circuit / monitoring circuit portion of the control device always operates using the power received from the power generation means built in the vibration damping actuator, while the power to the main control circuit is cut off during the standby time of the control device. Therefore, even if the battery is continuously used, the consumption of commercial power is small. When a sensor with low power consumption is selected and adopted, it is desirable that the operating power is also supplied from the battery.

[0045]

Seventh Embodiment A concrete configuration of a seventh embodiment of the vibration damping actuator according to the present invention will be described with reference to a schematic vertical sectional view of FIG.

This vibration damping actuator 80 is different from the above-described vibration damping actuator 30 in that a piezoelectric means is provided between the iron plate 81 and the iron powder mixed vibration-proof rubber 82 in order to incorporate a power generation means based on the displacement of the elastic member. The point is that the layer of the element 84 is inserted. The individual iron plate 81, the iron powder-mixed vibration isolating rubber 82, and the coil 83 may be the same as the iron plate 31, the iron powder-mixed anti-vibration rubber 32, and the coil 33, respectively.

In this case, the control device includes the control circuit 7 described above.
7 is adopted. When the vibration in the vertical direction is transmitted, the pressure applied to the piezo element 84 when the anti-vibration rubber 82 containing the iron powder expands and contracts accordingly changes and the piezo element 84
Is generated, and this is led to the control circuit 77, and the standby power and the like are obtained from the vibration energy as described above.

The power generating means in the sixth and seventh embodiments can be used as a vibration sensor.
It can be used as an alternative to the accelerometer 16 in the embodiment.
At this time, the control device 15 is controlled so that the output voltage of the power generation means becomes zero.

[0049]

As is apparent from the above description, in the vibration damping actuator according to the first solution of the present invention, the force for controlling the vibration is released from the constant restraint of the supporting force. By doing so, there is an advantageous effect that active control can be performed without a large mass body, and a vibration damping actuator that also suppresses pitching of an existing structure can be realized.

Further, in the vibration damping actuator according to the second solution of the present invention, the longitudinal vibration of the existing structure is further reduced by increasing the damping force of the longitudinal vibration generated by the electromagnetic conversion. This has an advantageous effect that a vibration suppression actuator that can be suppressed well can be realized.

Further, in the vibration damping actuator according to the third solution of the present invention, since the spring sensitivity of the elastic member is also adjusted statically, it is difficult to suppress it by active control. The ability to control the impact of
There is an advantageous effect that it is possible to realize a vibration damping actuator that also effectively suppresses vertical vibration of an existing structure from the beginning.

Further, in the vibration damping actuator according to the fourth solution of the present invention, the elastic sensitivity of the elastic member is reduced without impairing the steady supporting force. There is an advantageous effect that a vibration damping actuator that suppresses shaking better from the beginning can be realized.

Further, in the vibration damping actuator according to the fifth solution of the present invention, since power is generated based on external vibration, power consumption is reduced by that amount. There is an advantageous effect that a vibration damping actuator that does not require much running cost even when the pitching of the existing structure is actively suppressed can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a first embodiment of a vibration damping actuator according to the present invention.

FIG. 2 is an installation status diagram showing the usage mode and the like.

FIG. 3 is a schematic longitudinal sectional view of a second embodiment of the vibration damping actuator of the present invention.

FIG. 4 is a schematic longitudinal sectional view of a third embodiment of the vibration damping actuator of the present invention.

FIG. 5 is a schematic longitudinal sectional view of a fourth embodiment of the vibration damping actuator of the present invention.

FIG. 6 is a schematic longitudinal sectional view of a vibration damping actuator according to a fifth embodiment of the present invention.

FIG. 7 is a schematic vertical sectional view of a vibration-damping actuator according to a sixth embodiment of the present invention.

FIG. 8 is a schematic longitudinal sectional view of a vibration damping actuator according to a seventh embodiment of the present invention.

[Explanation of symbols]

 1 Ground (ground, base, vibration propagator) 2 Truck (large vehicle, moving body, vibration source) 3 Pitch component (vibration) 4 Base (leg, base, foundation, base) 5 House (house, building) Object, structure) 10 Vibration damping actuator 11 Iron plate (magnetic member) 12 Rubber anti-vibration rubber (elastic body, elastic member) 13 Coil (winding, electromagnet, electromagnetic conversion means) 14 Magnetic flux 15 Controller 16 Accelerometer (Sensor) 30 Vibration suppression actuator 31 Iron plate (air cooling means, magnetic member) 32 Vibration-proof rubber mixed with iron powder (elastic body, elastic member) 33 Coil (winding, electromagnet, electromagnetic conversion means) 34 Magnetic flux 40 Vibration suppression actuator 41 Plate (rubber magnet, magnetic member) 42 Anti-vibration rubber (elastic body, elastic member) 43 Coil (winding, electromagnet, electromagnetic conversion means) 44 Magnetic flux 50 Vibration suppression actuator 51 Plate (rubber magnet, magnetic) 52) Anti-vibration rubber (elastic body, elastic member) 53 Coil (winding, electromagnet, electromagnetic conversion means) 54 Magnetic flux 60 Vibration suppression actuator 61 Iron plate (magnetic member) 62 Bag body (elastic body, elastic member) 63 Coil (winding, electromagnet, electromagnetic conversion means) 64 Small room (small room, compartment, small bag) 70 Vibration damping actuator 71 Iron plate (magnetic member) 72 Iron powder mixed vibration-proof rubber (elastic body, elastic member) 73 Coil (Winding, electromagnet, electromagnetic conversion means) 74 lumen (power generation means storage space) 75 magnet (power generation means) 76 coil (power generation means) 77 control circuit (power saving means) 80 damping actuator 81 iron plate (magnetic member) 82 iron Powder-mixed anti-vibration rubber (elastic body, elastic member) 83 Coil (winding, electromagnet, electromagnetic conversion means) 84 Piezo element (electrostrictive member, power generation means)

Continued on the front page (72) Inventor Hideo Kobayashi 2-16-46 Minami Kamata, Ota-ku, Tokyo Inside Tokimec Co., Ltd. (72) Inventor Uhiko 2-16-46 Minami Kamata, Ota-ku, Tokyo Tokimec Co., Ltd. Inside

Claims (6)

[Claims] 1. A vibration damping actuator comprising an elastic member, a magnetic member sandwiching the elastic member, and electromagnetic conversion means acting on these magnetic members. 2. The vibration damping actuator according to claim 1, wherein a part or the whole of the elastic member has an enhanced magnetic permeability. 3. The vibration damping actuator according to claim 1, wherein a part or all of the magnetic member is formed as a permanent magnet. 4. The vibration damping actuator according to claim 1, wherein a part or the whole of the elastic member is formed of a bag divided into small chambers. 5. The vibration damping actuator according to claim 1, further comprising a power generation unit based on a displacement of the magnetic member or the elastic member. 6. The vibration damping actuator according to claim 5, wherein said power generation means is used as vibration detection means.