JP2013128367A - Vibration device, bell ringing device, and resonance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration device that does not use a spring, has few failures, has long life, is capable of being used efficiently, and has high versatility.SOLUTION: A vibration device is constructed by providing a movable iron core 2, which is movable in a constant direction, in a first solenoid 11 for resonance with the movable iron core and placing side by side solenoid 12(13) for vibration energization on one side or both sides of the first solenoid 11 in a moving direction of the movable iron core. The first solenoid 11 is continuously excited with a constant current and the solenoid 12 (13) for vibration energization is or are excited for a short time when the movable iron core 2 moves toward its corresponding side of the solenoid.

Description

  The present invention relates to a vibration device using a solenoid and a movable iron core, a bell ringing device using the vibration device, and a resonance device.

  A vibration device that vibrates a mover having a certain mass has a wide range of uses such as a mobile phone calling device, a bell ringing device, and a sieving device.

  Conventionally, this type of vibration device uses an eccentric motor, changes the rotation of the motor to a reciprocating linear motion with a crank, moves the mover by the magnetic force of the electromagnet, and moves the mover to energize the electromagnet There are those that turn the contact on and off, and those that vibrate the vibrating part with the magnetic force of the electromagnet and the repulsive force of the spring (see Patent Document 1).

  However, each of the above-described conventional vibration devices has a problem. For example, it is difficult to change the amplitude or frequency of vibration, and therefore, the design change such as adjusting the dimensions of the constituent members according to the usage mode. Is necessary, and there is a problem that the versatility is poor, or there is a problem that the energy conversion efficiency of the electric / machine is poor.

  As an example, a description will be given of a conventional vibration device that vibrates a vibration part with the magnetic force of an electromagnet and the repulsive force of a spring. The vibration device includes a case as shown in a plan view of FIG. 12 and a longitudinal sectional view of FIG. The coil 46 is fixedly provided at a midway height position 52, and the vibrating portion 42 is disposed in the case 52 so as to be laterally movable in a state in which the coil 46 is accommodated therein. A spring 44 is interposed therebetween. The vibration part 42 is formed by integrating upper and lower magnets 80 and 82 sandwiching the coil 46, movable yokes 66 and 68, and weights 90 and 92.

  In the above-described vibration device, by passing positive and negative currents through the coil 46, the vibration part 42 including the magnets 80 and 82 vibrates in the left-right direction against the elastic force of the spring 44. The surrounding fixing members vibrate. The vibration part 42 vibrates by resonating its mass and the spring 44, and the vibration is sustained by applying a current having a resonance frequency to the coil 46.

  In the above-described vibration device, since the resonance between the mass of the vibration part 42 and the spring 44 is used, the energy conversion efficiency of the electric / mechanical machine is good. However, since the spring 44 is used, Fatigue and breakage are likely to occur, the life is short, and it is difficult to change the amplitude and vibration frequency.

Japanese Patent No. 3855738

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration device that has high electrical / mechanical energy conversion efficiency, can be used for many years without using a spring, can be used for many years, and can be easily adjusted in amplitude and vibration frequency, and has high versatility. And

  The inventor of the present invention has studied the operation and action of the solenoid device used in the bell single hitting device in order to achieve the above-mentioned problem. Is proportional to the displacement of the movable iron core and has the same characteristics as the restoring force of the spring in the mechanical resonance mechanism, and we have found that the solenoid and the movable iron core constitute a kind of resonance device.

  The present invention was made based on the above knowledge obtained by the inventor, the vibration device according to the present invention is a vibration device using a movable iron core and a solenoid, for resonance with the movable iron core, A movable iron core is provided in the first solenoid that is continuously excited with a constant current so as to be movable in a certain direction, and is used to vibrate the movable iron core on one side or both sides of the movable direction of the first solenoid. These solenoids are arranged side by side.

  In the above configuration, when an initial motion is applied to the movable iron core in a state where the first solenoid is excited with a constant current, between the mass of the movable iron core and the attraction force of the first solenoid acting on the movable iron core. Transient vibration of resonance frequency occurs. During the period in which the movable iron core is moved to one side due to vibration, the vibration urging solenoid on that side is excited by energization, so that the vibration of the movable iron core is maintained. Since the transient vibration of the movable iron core also occurs when an excitation current is first applied to the first solenoid, a device for initial movement is not necessarily required.

  According to the present invention, since the resonance between the mass of the movable iron core and the attractive force of the solenoid (first solenoid) is used, the electrical / mechanical energy conversion efficiency is high, and vibration can be generated efficiently with low power. it can. In addition, since the suction force of the solenoid is used instead of the restoring spring, it is not necessary to use a spring, and it can be used for many years with little mechanical failure due to fatigue or damage of the spring.

  Further, the resonance frequency, that is, the vibration frequency can be changed by changing the excitation current of the first solenoid for resonance to increase or decrease the attractive force, and the phase and magnitude of the current flowing through the vibration energizing solenoid. Thus, the amplitude of the movable iron core can be adjusted. Thus, the vibration frequency and amplitude can be changed by changing the electrical setting, so that design changes such as dimensional changes of the constituent members are unnecessary, and the versatility is high.

The block diagram of a resonance apparatus. The characteristic view which shows the attraction force of the solenoid in the apparatus of FIG. The block diagram which shows the structure of the vibration apparatus which concerns on the 1st Embodiment of this invention. The characteristic view which shows the attraction | suction force of the solenoid in the vibration apparatus of FIG. The circuit diagram of the solenoid excitation circuit used for the vibration apparatus of FIG. The block diagram of the bell ringing apparatus using the vibration apparatus of FIG. The block diagram of the vibration apparatus which concerns on the 2nd Embodiment of this invention. The characteristic view which shows the attraction | suction force of the solenoid in the vibration apparatus of FIG. The circuit diagram of the solenoid excitation circuit used for the vibration apparatus of FIG. The block diagram of the bell ringing apparatus using the vibration apparatus of FIG. FIG. 4 is a circuit diagram of another solenoid excitation circuit, where (a) shows an excitation circuit corresponding to the vibration device of FIG. 3, and (b) shows an excitation circuit of the vibration device of FIG. The top view of the vibration apparatus using the conventional spring. The longitudinal cross-sectional view of the vibration apparatus of FIG.

  Here, first, the resonance apparatus described in [Means for Solving the Problems] will be described with reference to FIGS.

  FIG. 1 shows the configuration of the above-described resonance device, in which reference numeral 11 is a solenoid, 2 is a movable iron core, and 3 is a non-magnetic pipe. In a non-operating state, the movable iron core 3 is stationary substantially at the center of the solenoid 11 (a position that is the center of suction, usually the center in the width direction of the solenoid 11), and can move freely in the pipe 3 in a fixed direction. It is like that. The solenoid 11 is excited with a constant current.

  FIG. 2 is a characteristic diagram showing the attractive force of the solenoid 11. The horizontal axis indicates the position of the movable iron core 2, and the vertical axis indicates the magnitude of the attractive force acting on the movable iron core 2.

  As can be seen from this characteristic diagram, when the solenoid 11 is excited with a constant current, the attractive force is proportional to the position of the movable iron core 2 within a certain range centered on the stationary position O, and the movable iron core 2 is brought to the stationary position. Work to bring it back. That is, the magnetic attraction force has the same force-position characteristic as a mechanical spring, and resonates with the mass of the movable iron core 2 like the spring.

  Further, as can be seen from FIG. 2, the attractive force of the solenoid 11 changes depending on the magnitude of the exciting current (currents a1, a2, a3) (current a1 <a2 <a3), and the increase / decrease change of the exciting current is a spring constant. Therefore, the resonance frequency with the mass of the movable iron core 2 is variable depending on the excitation current.

[First Embodiment]
FIG. 3 shows a vibration device according to the first embodiment of the present invention. This vibration device is obtained by adding another solenoid to the solenoid shown in FIG.

  That is, the solenoid 11 shown in FIG. 1 is used as the first solenoid, and the movable iron core 2 is provided in the first solenoid 11 so as to be movable in a fixed direction. The second solenoid 12 is arranged side by side on the one side (right side in the drawing). The second solenoid 12 shares the first solenoid 11 and the movable iron core 2, but the center position thereof is different from the stationary position of the movable iron core 2. The movement of the movable iron core 2 is guided by a non-magnetic pipe 3.

  The first solenoid 11 is for resonance with the movable iron core and is always excited with a constant current during operation of the vibration device. The second solenoid 12 is for vibration energization, and is excited in connection with the movable core 2 moving to the second solenoid 12 side.

  FIG. 4 shows the attractive force characteristics given to the movable iron core 2 of the second solenoid 12. The attractive force of the second solenoid 12 acts to draw the movable core 2 to the center position, and when the movable core 2 is near the stationary position, the movable core 2 is driven in the right direction.

  FIG. 5 shows an example of an excitation circuit for the first and second solenoids 11 and 12 in the vibration device of the first embodiment. Reference numeral 4 denotes a DC power source, and the first solenoid 11 is excited with a constant current through a resistor 5. The second solenoid 12 for energizing vibrations exerts a suction force on the movable iron core 2 in the right direction, so that vibration is energized by energizing the movable iron core 2 while moving in the right direction. be able to. The second solenoid 12 is excited for a predetermined period by turning on and off the switching transistor 6.

  The drive signal for the transistor 6 may be provided by a signal generation circuit (not shown), or may be provided by a feedback coil 7 coupled to the second solenoid 12. When the movable iron core 2 moves to the right, the magnetic flux in the second solenoid 12 increases, and a positive voltage is induced in the second solenoid 12 and the feedback coil 7 to drive the switching transistor 6 on. When the movable iron core 2 moves to the left, the induced voltage becomes negative and the switching transistor 6 is off. As a result, vibration is energized.

  FIG. 6 shows a bell ringing device using the vibration device according to the first embodiment shown in FIG. In this bell ringing device, the movable iron core 2 is arranged vertically so as to vibrate up and down, and the movable iron core 2 vibrates in the up-and-down direction and repeatedly hits the bells 8 and 8 (partially drawn). Yes. The bells 8 and 8 provided on the upper and lower sides of the movable iron core 2 are repeatedly hit.

  Since the suction force of each solenoid 11 and 12 is sufficiently strong and the vibration does not need to be sinusoidal, it is suitable for hitting the bell 8 repeatedly. The sound intensity can be adjusted by the excitation intensity of the first solenoid 11 and the excitation period and period of the second solenoid 12. The vertical arrangement of the pipe 3 has an effect of reducing the friction between the pipe 3 and the movable iron core 2, and gravity can be used for the downward excitation.

[Second Embodiment]
FIG. 7 shows a vibration device according to the second embodiment of the present invention. This vibration device is obtained by adding a third solenoid 13 for energizing vibration to the vibration device of FIG. The third solenoid 13 shares the movable iron core 2 with the first and second solenoids 11 and 12, but the center position thereof is symmetrical to the second solenoid 12 with the first solenoid 11 interposed therebetween. . That is, if the second solenoid 12 is on the right of the stationary position of the movable core 2, the third solenoid 13 is disposed on the left of the stationary position of the movable core 2.

  FIG. 8 shows the characteristics of the attractive force applied to the movable iron core 2 of the solenoids 11, 12, 13 in the vibration device of the second embodiment shown in FIG. 7. The suction force of the third solenoid 13 acts to draw the movable core 2 to the center position, and when the movable core 2 is near the stationary position, the movable core 2 is driven in the left direction.

  FIG. 9 shows an example of excitation circuits for the first, second, and third solenoids 11, 12, and 13 in the vibration device of FIG. Similar to the excitation circuit of FIG. 5 described above, a resistor 5 is connected in series to the first solenoid 11, a switching transistor 6 is connected in series to the second solenoid 12, and a third solenoid 13 is connected to the first solenoid 11. Also, the switch transistor 9 is connected in series.

  The vibration energizing third solenoid 13 applies a suction force to the movable iron core 2 in the left direction, and therefore energizes the vibration by energizing the movable iron core 2 while moving in the left direction. be able to. The third solenoid 13 is excited for a predetermined period in a phase opposite to that of the second solenoid 12 by turning on and off the switch transistor 9 connected in series thereto.

  As described in the first embodiment with reference to FIG. 5, the driving signals for the transistors 6 and 9 may be given by a signal generation circuit, or may be coupled to the second solenoid 12 or the third solenoid. It can also be provided by a feedback coil.

  FIG. 10 shows a bell ringing device using the vibration device according to the second embodiment shown in FIG. 7. In this bell ringing device, the movable iron core 2 vibrates in the left-right direction and the bell 8 (partly). Is drawn).

  Even in this bell ringing device, the suction force of each solenoid 11, 12, 13 is strong, and the vibration does not need to be sinusoidal, so it is suitable for hitting the bell 8 continuously. The sound intensity can be adjusted by the excitation intensity of the first solenoid 11 and the excitation period of the third solenoid 13 together with the second solenoid 12. Since the movable core 2 is energized every half cycle, it vibrates strongly and can generate a strong bell sound.

  11 (a) and 11 (b) show other examples of the excitation circuit of the solenoid. (A) shows an excitation circuit corresponding to the vibration device of the first embodiment, and (b) shows the second embodiment. The excitation circuit of the vibration apparatus of a form is shown, respectively.

  In the excitation circuit (a), the first solenoid 11, the second solenoid 12, and the switch transistor 6 are connected in series. When the second solenoid 12 is excited, the excitation current is the first solenoid. 11 is passed. Therefore, the first solenoid 11 + the second solenoid 12 function as a vibration energizing solenoid, the effective number of coil turns increases, and the current can be reduced. In the excitation circuit of (b), the second solenoid 12 and its switch transistor 6 are cascade-connected to the first solenoid 11, and the third solenoid 13 and its switching transistor 9 are cascade-connected, Both the excitation currents of the second solenoid and the third solenoid pass through the first solenoid 11, and the power supply current can be reduced. In (a) and (b), reference numeral 10 denotes a diode provided in parallel with the first solenoid 11.

11 First solenoid (for resonance with movable iron core)
12 Second solenoid (for vibration energization of movable iron core)
13 Third solenoid (for vibration energization of the movable iron core)
2 Movable iron core 3 Pipe 8 Bell

Claims (3)

A vibration device using a movable iron core and a solenoid,
For the purpose of resonance with the movable iron core, a movable iron core that can move in a fixed direction is provided inside the first solenoid that is continuously excited with a constant current. A vibration device characterized by arranging vibration energizing solenoids side by side.   A bell ringing device comprising the vibration device according to claim 1, wherein the bell is continuously hit by using a movable iron core of the vibration device as a hitting rod.   A solenoid and a movable iron core that are continuously excited with a constant current are provided, and the center of the solenoid and the stationary position of the movable iron core are made to coincide with each other, and a resonance state is established by the attraction force of the solenoid and the mass of the movable iron core. Resonant device.

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