JP2003103219A - Vibrator utilizing reverse electromotive force - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibrator in which a reverse electromotive force generated when a primary current is shielded is utilized, a restitution force restituted against a butted permanent magnet is made as an vibromotive force, an electric power is further rectified and is charged to a secondary battery and a use of the secondary battery for a long period of time is maintained and which is assembled to a cellular phone, PHS or the like and is used as a vibrator for slave-calling. SOLUTION: In the vibrator, after a primary current is energized to a primary coil in a switching circuit in which the primary coil is wound on a laminated iron core and an input signal current applies a positive magnetic characteristic of a compound semiconductor magnetic resistance element, when it is shielded to generate a reverse electromotive force, since it becomes the same polarity as a magnetic pole of the permanent magnet, a large restitution is generated and the restitution force is made as an electromotive force. A rectification circuit for taking out the electric power from a secondary coil and charging it to the secondary battery is assembled to maintain a use of the secondary battery for a long period of time. A miniaturization and a light weight become possible and it is assembled to the cellular phone. PHS or the like to make it as a vibrator for slave-calling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrator having a repulsive force that repulsively repels a contacting permanent magnet by utilizing a counter electromotive force and uses the repulsive force as a vibrating force.

[0002]

2. Description of the Related Art There are a motor type and an electromagnetic type as a vibrator. First, the motor type is a vibration generator in which an unbalanced weight is attached to a rotary shaft of a motor and a centrifugal force generated by rotation is used as an exciting force. Further, the electromagnetic type uses a magnetizing coil of an electromagnetic vibrator and a repulsion spring to generate mechanical vibration, but these vibrators are of primary power consumption type.

Further, in the electromagnetic type, there is provided a structure having a low power consumption structure in which a circuit for collecting an induced current of a back electromotive force of an exciting coil is provided and superposed on the primary power to suppress the consumption of the primary current. , Both are primary power consumption type.

[0004]

SUMMARY OF THE INVENTION A counter-electromotive force generated when a primary current is interrupted is utilized to provide a vibrator having a repulsive force as a repulsive force that repels an abutting permanent magnet. Provided is a vibrator using a counter electromotive force that can maintain a secondary battery for a long time by providing a circuit for charging the secondary battery.

Since the substantially U-shaped laminated iron core has a closed magnetic circuit structure, the coil can be easily wound, the magnetic density can be increased with a small number of coils and a small current, and the size and weight can be reduced.

[0006]

Means for Solving the Problems When a permanent magnet formed in a rectangular shape is used to contact one side of a substantially square-shaped closed magnetic circuit, magnetic induction induces magnetic flux in a substantially U-shaped laminated iron core in a direction opposite to that of the permanent magnet. Different magnetic poles are generated and attracted to form a closed magnetic circuit.The primary coil is wound around the laminated core in the direction of superimposing electromagnetic energy on the generated magnetic poles. A switching circuit that applies the positive magnetic characteristics of a compound semiconductor magnetoresistive element in which the end of a laminated iron core is closely bonded is formed.When a primary current is applied to the primary coil, electromagnetic energy is superimposed and the magnetic field increases, and the internal resistance of the element increases. When the input signal current is reduced by increasing the primary current and a large back electromotive force is generated, a large magnetic flux change that links the coils occurs, and the magnetic pole instantly becomes the same pole as the permanent magnet. But Flip flick the permanent magnet, a vibrator utilizing a counter electromotive force, characterized in that the repulsive force and the excitation force.

A secondary coil is wound around the laminated iron core to extract a back electromotive force induced current, a charging / discharging capacitor is provided, a rectifying / smoothing circuit for rectifying with a rectifying element diode and charging the secondary battery is incorporated. It is a vibrator that uses a back electromotive force and is characterized by being able to be used for a long time.

Since the primary coil and the secondary coil can be directly wound around the laminated iron core, the workability is good, the bobbin is unnecessary, and since the closed magnetic circuit structure using the permanent magnet is used, the number of windings of the coil is small. To increase the magnetic flux density with a small current,
It is a vibrator using a counter electromotive force, which can be made compact and lightweight and can be incorporated into a mobile phone, a PHS, or the like to serve as an incoming call vibrator.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a basic configuration and basic circuit configuration diagram of a vibrator according to an embodiment of the present invention.

As a structure of a vibrator, when a permanent magnet 1 formed into a rectangular body is used to contact one side of a substantially rectangular closed magnetic circuit, the substantially U-shaped laminated iron core 2 is magnetically connected to a magnetic pole of the permanent magnet by magnetic induction. An opposite pole in the opposite direction is generated and attracted to form a substantially square closed magnetic circuit.

The permanent magnet may be a weak magnet that does not magnetically saturate the laminated iron core, or may be provided with a gap to weaken magnetic induction and contact the laminated iron core.

The permanent magnet is housed in a slide holder 3, and convex projections 4 are provided at both ends of the holder for sliding, and a concave groove 6 is provided in a slide holder 5 so that the slide holder has a convex shape. The projection part of the slide reciprocates in the groove, and the abutting part is provided with the bow-and-arrow shaped leaf spring 7, and when the impact at the time of collision is propagated as vibration, at the same time, it rebounds to the original position for repulsion and operates continuously. The structure will be a vibrator.

The slide holder is formed of a non-magnetic insulating member and is integrated with the laminated iron core.

The laminated core may be a ferrite core.

A primary coil 8 and a secondary coil 9 are wound around the substantially U-shaped laminated iron core. The primary coil is wound in a direction in which the same magnetic pole as the magnetic pole generated by magnetic induction is generated, and electromagnetic energy is superposed when energized. It is connected to a switching circuit and generates a back electromotive force when it is cut off.

The secondary coil stores the induced current of the generated counter electromotive force in the charging / discharging capacitor 10, and the rectifying element diode 1
It is connected to a rectifying / smoothing circuit for rectifying by 1 and smoothing by the smoothing capacitor 12 to charge the secondary battery 13.

Since the coil can be wound directly on the laminated iron core, the workability is good and the bobbin is unnecessary, and the permanent magnet is brought into contact with the coil to form a closed magnetic circuit so that the number of windings and the magnetic flux density can be increased with a small current. It is possible to reduce the size and weight.

In the switching circuit configuration, the primary current is applied to and cut off from the primary coil by closely bonding the compound semiconductor magnetoresistive element 14 to the end portion of the laminated iron core to obtain the input signal current 1
5 is a circuit configuration in which the positive magnetic characteristic of the magnetic field is applied to activate and deactivate the transistor 16 so that the primary current is applied and interrupted.

As a basic circuit configuration of the compound semiconductor magnetoresistive element, for the input signal current, a compound semiconductor magnetoresistive element and an external resistor 17 are connected in series to change the internal resistance of the element due to a magnetic field to change the current. Is taken out from the connection as a voltage and supplied to the base of the transistor to activate and deactivate it.

In order to enhance the positive magnetic characteristics due to the magnetic field, the resistance lower than the internal resistance of the compound semiconductor magnetoresistive element is externally used to increase the influence of the magnetoresistive effect.

Since the compound semiconductor magnetoresistive element generally has a low sensitivity in a low magnetic field, a bias magnet is used, and the magnetic field sensitivity is increased by shifting the operating point to a portion having a high magnetic field sensitivity. Apply the characteristics.

In this circuit configuration, the compound semiconductor magnetoresistive element is closely bonded to the end of the laminated iron core so that the magnetic pole serves as a bias magnet so that the compound semiconductor magnetoresistive element can be used alone. become.

Now, when the input signal current is supplied, the internal resistance of the compound semiconductor magnetoresistive element is made conductive only by the magnetic field generated by magnetic induction, the transistor is operated and the primary current is supplied, and the primary coil is supplied with electromagnetic energy. When the transistor is stopped, the primary current is cut off and counter electromotive force is generated in the coil.

A large magnetic flux change that links the coils occurs,
Since the magnetic poles instantly become the same poles as the permanent magnets that make up the closed magnetic circuit, a large repulsion occurs and the permanent magnets are thrown away. It works repeatedly.

A plurality of compound semiconductor magnetoresistive elements may be used in series.

A backflow prevention diode 18 is inserted between the transistor and the primary coil to protect the transistor from back electromotive force.

As a structure of the rectifying / smoothing circuit, the induced current of the generated counter electromotive force is taken out to a secondary coil, a charging / discharging capacitor is provided, and a secondary battery is charged through a capacitor for rectifying and smoothing with a rectifying element diode. Use a rectifying and smoothing circuit.

In the rectifying / smoothing circuit, since the charging current of the capacitor is zero in the initial state in the rectifying / smoothing circuit, the plus side and the minus side of the capacitor are short-circuited. A large inrush current of the capacitor occurs at the moment when the counter electromotive force flows into the circuit,
In order to suppress this inrush current, there is provided one in which an inrush current prevention circuit is provided between the output side of the rectifying element and the input side of the smoothing capacitor.

However, in this circuit configuration, when a primary current is applied to the primary coil, an input electromotive force is generated, and an increase in magnetic field due to an increase in magnetic flux density causes an electromotive force in the secondary coil to charge the capacitor. Since the initial state is not zero, the inrush current can be suppressed, and the inrush current can be suppressed even if the inrush is repeated at short intervals.

The secondary coil is formed by winding a coil that can charge the secondary battery.

A plurality of charging / discharging capacitors may be provided.

The rectifying element diode may be a bridge circuit.

[0033]

As described above, according to the present invention, a permanent magnet is used on one side of a substantially rectangular closed magnetic circuit to abut a substantially U-shaped laminated iron core, and a small primary current is applied to the primary coil of the laminated iron core. When the power is cut off later, a large counter electromotive force is generated, which is a vibrator that utilizes the counter electromotive force with the repulsive force that repels and repels the permanent magnet as the exciting force.

A secondary coil is provided on the laminated iron core to rectify and smooth the induced current of the counter electromotive force and charge the secondary battery to maintain long-term use.

Since the compound semiconductor magnetoresistive element can be used alone and does not occupy a large volume, the coil can be directly wound, a bobbin is not required, workability is improved, and the size and weight can be reduced. be able to.

[Brief description of drawings]

FIG. 1 is a basic configuration and basic circuit configuration diagram of a vibrator.

FIG. 2 is a diagram of a slide holder.

[Explanation of symbols]

1 permanent magnet 2 R-shaped laminated iron core 3 Sliding holder 4 Convex protrusion 5 Sliding holder 6 concave groove 7 leaf spring 8 primary coil 9 Secondary coil 10 Charge / discharge capacitors 11 Rectifier diode 12 Smoothing capacitor 13 Secondary battery 14 Compound semiconductor magnetoresistive element 15 Input signal current 16 transistors 17 External resistor 18 Backflow prevention diode

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 11/00 H02K 33/06 5H633 33/06 H02P 7/00 101H H02P 7/00 101 9/00 Z 9 / 00 H02K 11/00 ZF term (reference) 5D107 AA03 AA13 BB08 CC09 CC10 CD01 DD03 DD12 5G003 AA07 AA08 BA01 CC02 GB04 5H540 AA10 BA10 BB06 BB08 FA13 FC05 5H590 AA02 AA03 ABB02 CC22 CD01 CE10 FA00 BB03A609A22 UB00 5H633 BB08 GG02 GG04 GG16 GG21 GG22 HH03 HH14 JA02

Claims (3)

[Claims] 1. When a permanent magnet formed into a rectangular body is used to contact one side of a substantially square-shaped closed magnetic circuit, magnetic attraction induces a magnetic pole of the U-shaped laminated iron core to a different pole in the opposite direction to the magnetic pole of the permanent magnet. A primary coil is wound around the laminated core in a direction that superimposes electromagnetic energy on the generated magnetic poles to form a closed magnetic circuit by attraction and suction, and the input current is applied to the primary coil to interrupt or cut the primary current. A switching circuit that applies the positive magnetic characteristics of the compound semiconductor magnetoresistive element that is tightly bonded to the end of the element.When a primary current is applied to the primary coil, electromagnetic energy is superimposed and the magnetic field increases, increasing the internal resistance of the element. If the input signal current is reduced by a large amount and the primary current is cut off and a large back electromotive force is generated, a large magnetic flux change that links the coils occurs and the magnetic pole instantly becomes the same pole, resulting in a large repulsion. Magnet Can fly, vibrator utilizing a counter electromotive force, characterized in that the repulsive force and the excitation force. 2. A laminated core is provided with a rectifying / smoothing circuit for extracting a counter electromotive force induced current generated by winding a secondary coil, providing a charging / discharging capacitor, rectifying with a rectifying element diode, and charging the secondary battery. The vibrator using the counter electromotive force according to claim 1, wherein the secondary battery can be used for a long time. 3. A primary coil and a secondary coil can be directly wound around a laminated iron core, which has good workability, does not require a bobbin, and has a closed magnetic circuit structure using a permanent magnet, so that a small number of coils can be wound. , To increase the magnetic flux density with a small current,
The vibrator using back electromotive force according to claim 1 or 2, wherein the vibrator can be made compact and lightweight and can be incorporated into a mobile phone, a PHS or the like to provide a vibrator for incoming calls.