JPH04355641A - Vibration generating actuator - Google Patents

Abstract

PURPOSE:To obtain a small size vibration generating actuator which can generate a vibration to be sensed by a human body and which has outside dimensions less than a half of the conventional dimensions by a method wherein a magnetic circuit which utilizes interactions between the magnetic fields of permanent magnets and the magnetic fields induced by alternating exciting currents applied to electromagnetic coils. CONSTITUTION:Flat electromagnetic coils 3 are fixed to the upper and lower parts of the inside of a nonmagnetic housing 1 having a square cross-section. Rectangular-parallelepiped permanent magnets 4 magnetized along respective thickness directions are fixed to the upper and lower sides of a movable plate 2. The movable plate 2 is placed between the upper electromagnetic coil 3 and the lower electromagnetic coil 3 to form a magnetic circuit. Further, alternating exciting currents to induce magnetic fields which repulse or attract the magnetic fields of the permanent magnets 4 are applied to the electromagnetic coils to generate electromagnetic forces and the movable plate 2 is supported by supporters 5 provided on the left and right surfaces of the housing 1 so as to be moved vertically by the electromagnetic forces.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration generating actuator used in a mobile transmitter/receiver or the like, which uses a magnetic circuit to sense and call generated vibrations with the human body.

0002

[Prior Art] A conventional vibration generating actuator is shown in Fig. 5.
As shown in FIG. 2, a semicircular weight 9 is fixed to a rotating shaft 8 of a cylindrical drive motor 7, and the asymmetric rotational movement of the weight 9 generates vibrations.

0003

[Problems to be Solved by the Invention] Conventional vibration-generating actuators use a drive motor with a magnetic circuit formed by a cylindrical permanent magnet and a coil to rotate a weight and generate vibrations. There was a problem in that the shape of the generation actuator became large.

An object of the present invention is to provide a vibration-generating actuator that is smaller in size than conventional vibration-generating actuators and that uses a magnetic circuit to generate vibrations that can be sensed by the human body.

[0005]

[Means for Solving the Problems] In order to achieve the above object, in the vibration generating actuator of the present invention, an electromagnetic coil and a movable plate integrated with a permanent magnet are disposed inside a housing made of a non-magnetic material. A magnetic circuit is formed by applying an alternating excitation current to the electromagnetic coil, and the generated electromagnetic force interacts with the magnetic field created by the permanent magnet to move the movable plate and generate vibrations that can be felt by the human body. This is what I did.

The above magnetic circuit is formed by fixing electromagnetic coils to the upper and lower surfaces of the inside of a housing made of a non-magnetic material, and inserting a magnetized permanent magnet between the upper and lower fixed electromagnetic coils. A magnetic circuit is formed by arranging a movable plate fixed to the lower side, or by arranging only magnetized permanent magnets without using a movable plate. Alternatively, magnetized permanent magnets are fixed to the upper and lower surfaces inside the housing, and a movable plate with electromagnetic coils fixed to the upper and lower sides is placed between the fixed upper and lower permanent magnets to form a magnetic circuit. may be formed.

That is, the vibration generating actuator of the present invention has 1. A vibration-generating actuator that forms a magnetic circuit consisting of a permanent magnet and an electromagnetic coil, and uses electromagnetic force to vibrate a movable plate up and down to generate vibrations that can be felt by the human body.It is a non-magnetic actuator with a rectangular cross-sectional shape. Flat-shaped electromagnetic coils are fixed to the upper and lower surfaces inside the housing, and a rectangular permanent magnet magnetized in the thickness direction is placed between the electromagnetic coils on the upper and lower surfaces. A magnetic circuit is formed by arranging movable plates fixed to the side and lower surfaces, and an alternating excitation current is applied to the electromagnetic coils arranged on the upper and lower surfaces to form a magnetic field that energizes the magnetic field created by the permanent magnet. This vibration generating actuator is characterized in that it is configured to vibrate the movable plate vertically. 2. A vibration generating actuator that forms a magnetic circuit consisting of a permanent magnet and an electromagnetic coil, and uses electromagnetic force to vibrate a movable plate up and down to generate vibrations that can be sensed by the human body. A permanent magnet magnetized in the thickness direction is fixed so that the magnetic poles facing each other have different polarities on the lower surface, and a flat electromagnetic coil is placed above between the permanent magnets on the upper and lower surfaces. A magnetic circuit is formed by arranging movable plates fixed to the side and lower surfaces, and electromagnetic coils are arranged on the upper and lower surfaces.
This vibration generating actuator is characterized in that it is configured to vibrate a movable plate up and down by applying an alternating excitation current so as to form a biasing magnetic field to a magnetic field created by a permanent magnet. 3. A vibration generating actuator that forms a magnetic circuit consisting of a permanent magnet and an electromagnetic coil, vibrates the permanent magnet vertically using electromagnetic force, and generates vibrations that can be sensed by the human body. A flat electromagnetic coil is fixed to the lower surface, and a permanent magnet magnetized in the thickness direction is arranged between the electromagnetic coils on the upper surface and the lower surface via a spring to form a magnetic circuit. A vibration characterized in that an alternating excitation current is applied to the electromagnetic coils arranged on the surface and the lower surface so as to form a magnetic field that energizes the magnetic field created by the permanent magnet, and the permanent magnet is vibrated up and down. It is a generation actuator.

[0008]

[Operation] An alternating excitation current in which currents flow in opposite directions is applied to the electromagnetic coil on the upper surface and the electromagnetic coil on the lower surface of the vibration generating actuator configured as described above, so that the magnetized permanent magnets facing each other are Generate the same polarity on the electromagnetic coil side or generate magnetic fields of different polarities that attract each other, and move the permanent magnet or the movable plate fixed to the permanent magnet up and down by the repulsive force of the same polarity or the attractive force of the different polarities. . Therefore, the polarity of the magnetic poles of the permanent magnets attached to the movable plate is different on the top and bottom surfaces, so the magnetic field created by the opposing permanent magnets in the electromagnetic coils attached to the top and bottom surfaces of the non-magnetic housing. A movable plate with permanent magnets fixed by applying an alternating excitation current to create a magnetic field that energizes the object, and creating a magnetic field in the repelling direction on the upper surface and the magnetic field in the attracting direction on the lower surface using an electromagnetic coil. Alternatively, when the permanent magnet moves downward and then the direction of the current flowing through each electromagnetic coil is reversed, the movable plate to which the permanent magnet is fixed or the permanent magnet moves upward, causing a strong electromagnetic force to act on the vibration-generating actuator. This produces vibrations that can be detected by the human body.

[0009]

Embodiments Examples of the present invention will be described with reference to the drawings. FIG. 1 shows a vibration-generating actuator according to a first embodiment of the present invention, in which a movable plate having permanent magnets fixed on both sides is arranged between electromagnetic coils to form a magnetic circuit. In Figure 1, the external dimensions are 10 mm wide, 10 mm long, and 10 mm high.
A flat electromagnetic coil 3 is fixed to the upper and lower surfaces of the inside of a non-magnetic housing 1 having a rectangle-shaped cross section, and a magnetic coil 3 is inserted between the upper and lower electromagnetic coils 3 in the thickness direction. A magnetic circuit is formed by fixing rectangular permanent magnets 4 magnetized to the upper and lower sides of the movable plate 2 such that the upper and lower surfaces have different magnetic properties. Further, the movable plate 2 is supported by supports 5 installed on the left and right surfaces inside the housing 1 so as to be movable up and down. The outer dimensions of the housing 1 may be round with an outer diameter of 10 mm and a height of 10 mm. To generate vibration with the vibration generating actuator of the present invention, first a positive half-wave current of an alternating excitation current is applied to the upper electromagnetic coil 3, and a magnetic field of the same polarity as the opposing permanent magnet 4 is applied to the upper electromagnetic coil 3. 3 side, and the movable plate 2 to which the permanent magnet 4 is fixed is moved downward by the repulsive force due to the same polarity. At the same time, a negative half-wave current of the alternating excitation current is applied to the lower electromagnetic coil 3 to generate a magnetic field with a polarity different from that of the opposing permanent magnet 4 on the lower electromagnetic coil 3 side, which attracts the movable plate 2. can be moved in one direction by repulsive force and attractive force,
Next, when the direction of the current flowing through each electromagnetic coil is reversed, the movable plate 2 moves upward. Therefore, by applying an alternating excitation current to the electromagnetic coil, the movable plate 2 is moved in the vertical direction, and strong vibrations are generated in the vibration-generating actuator to generate vibrations that can be felt by the human body.

FIG. 2 shows a second embodiment of a vibration generating actuator in which a magnetic circuit is formed by arranging a movable plate having electromagnetic coils fixed to both sides between permanent magnets. In Figure 2, the external dimensions are 10 mm in width, 10 mm in length, 10 mm in height,
Rectangular parallelepiped permanent magnets 4 magnetized in the thickness direction so that the upper and lower opposing surfaces have different polarities are fixed to the inner upper and lower surfaces of the square-shaped non-magnetic housing 1, A movable plate 2 having flat electromagnetic coils 3 fixed to the upper and lower sides is arranged between the upper and lower permanent magnets 4 to form a magnetic circuit. In addition, the movable plate 2 is supported by supports 5 installed on the left and right surfaces inside the housing 1 so that it can move up and down, and the magnetic field created by one of the electromagnetic coils facing the permanent magnet is So that it is the same pole as the magnetic pole,
The other electromagnetic coil is made to have a different polarity from the magnetic pole formed by the permanent magnet, and by applying an alternating excitation current to the electromagnetic coil, the movable plate 2 is moved in the vertical direction, and strong vibrations are obtained in the vibration-generating actuator.

FIG. 3 shows a vibration generating actuator according to a third embodiment in which a permanent magnet is arranged between electromagnetic coils to form a magnetic circuit. In Figure 3, the external dimensions are 10
A flat electromagnetic coil 3 is fixed to the upper and lower surfaces of the inside of a square-shaped non-magnetic housing 1 with a length of 10 mm and a height of 10 mm, and between the upper and lower electromagnetic coils 3,
A magnetic circuit is formed by arranging only rectangular permanent magnets 4 magnetized in the thickness direction. Further, the permanent magnet 4 is supported by supports 5 installed on the left and right surfaces inside the housing 1 so as to be able to move up and down, and is supported by one side of the electromagnetic coil 3 installed on the upper and lower surfaces inside the housing. By generating a repelling magnetic field with the same polarity as the opposing permanent magnet, and generating an attractive magnetic field in the other electromagnetic coil 3, and applying an alternating excitation current to the electromagnetic coil 3, strong vibrations can be obtained. .

FIG. 4 shows a vibration generating actuator in which a permanent magnet is arranged between electromagnetic coils via a spring to form a magnetic circuit. In Figure 4, the external dimensions are 10 mm horizontally,
A flat electromagnetic coil 3 is installed on the inner upper and lower surfaces of a square-shaped non-magnetic housing 1 with a length of 10 mm and a height of 10 mm.
is fixed, and a rectangular permanent magnet 4 magnetized in the thickness direction is arranged between the upper and lower electromagnetic coils 3 to form a magnetic circuit. Further, the permanent magnet 4 is supported by springs 6 fixed to the upper, lower, left and right surfaces of the inside of the housing 1, respectively.

[0013]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects. A magnetic circuit is formed by the housing, a flat electromagnetic coil, and a rectangular permanent magnet, and the positive and negative directions of the alternating excitation current are alternately applied to the electromagnetic coil so that the polarity is the same or different from that of the permanent magnet facing the electromagnetic coil. The external dimensions of the vibration generating actuator of the present invention are 10 mm in width, 10 mm in length, and 10 mm in height. Can be done. The external dimensions of a conventional vibration generating actuator in which a magnetic circuit was formed by a cylindrical electromagnetic coil and a permanent magnet were an outer diameter of 7 mm and a length of 22 mm. Therefore, the external length of the vibration-generating actuator of the present invention is less than 1/2 that of the conventional product, and it is possible to easily provide a small-sized vibration-generating actuator that generates vibrations that can be sensed by the human body.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vibration actuator of the present invention in which a movable plate having a permanent magnet fixed thereto is arranged between electromagnetic coils to form a magnetic circuit.

FIG. 2 is a perspective view of the vibration actuator of the present invention in which a movable plate having an electromagnetic coil fixed thereto is arranged between permanent magnets to form a magnetic circuit.

FIG. 3 is a perspective view of the vibration actuator of the present invention in which a permanent magnet is arranged between electromagnetic coils to form a magnetic circuit.

FIG. 4 is a perspective view of the vibration actuator of the present invention in which a permanent magnet is arranged between electromagnetic coils via a spring to form a magnetic circuit.

FIG. 5 is a perspective view of a conventional vibration actuator.

[Explanation of symbols]

1 Housing 2 Movable plate 3 Electromagnetic coil 4 Permanent magnet 5 Support equipment 6 Spring 7 Drive motor 8 Rotation axis 9 Weight

Claims (3)

[Claims] [Claim 1] A magnetic circuit consisting of a permanent magnet and an electromagnetic coil is formed, and a movable plate is vibrated up and down by electromagnetic force,
A vibration-generating actuator that generates vibrations that can be sensed by the human body, in which flat electromagnetic coils are fixed to the upper and lower surfaces of the inside of a non-magnetic housing having a rectangular cross-sectional shape. A magnetic circuit is formed by arranging a movable plate having rectangular permanent magnets magnetized in the thickness direction fixed to the upper and lower surfaces between the electromagnetic coils on the lower surface, and forming a magnetic circuit between the upper and lower surfaces. An alternating excitation current is applied to the electromagnetic coil placed in the magnetic field so as to form a magnetic field that energizes the magnetic field created by the permanent magnet.
A vibration generating actuator characterized by being configured to vibrate a movable plate up and down. [Claim 2] A magnetic circuit consisting of a permanent magnet and an electromagnetic coil is formed, and a movable plate is vibrated up and down by electromagnetic force,
A vibration-generating actuator that generates vibrations that can be sensed by the human body, and is a permanent magnet that is magnetized in the thickness direction so that the magnetic poles facing each other on the upper and lower surfaces inside the non-magnetic housing have different polarities. A magnet is fixed, and a movable plate having flat electromagnetic coils fixed to the upper and lower surfaces is arranged between the permanent magnets on the upper and lower surfaces to form a magnetic circuit. A vibration generating actuator characterized in that an alternating excitation current is applied to an electromagnetic coil disposed in the magnetic coil so as to form a magnetic field that energizes the magnetic field created by the permanent magnet, thereby vibrating a movable plate up and down. 3. A vibration generating actuator that forms a magnetic circuit consisting of a permanent magnet and an electromagnetic coil, vibrates the permanent magnet vertically using electromagnetic force, and generates vibrations that can be sensed by the human body, the vibration generating actuator having a non-magnetic housing. A magnetic circuit is formed by fixing flat electromagnetic coils to the inner upper and lower surfaces, and placing a permanent magnet magnetized in the thickness direction between the electromagnetic coils on the upper and lower surfaces via a spring. an alternating excitation current is applied to the electromagnetic coils formed on the upper surface and the lower surface so as to form a magnetic field that energizes the magnetic field created by the permanent magnet, and the permanent magnet is vibrated up and down. A vibration generating actuator featuring: