JP3233718U - Vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator which extracts mechanical vibration energy of a magnet to the outside by forming a coil, arranging a magnet in the coil, and interrupting the current of the coil.
SOLUTION: A first magnet 3 is placed in a coil 2, an electric current is passed through the coil to move the magnet, a second magnet 5 connected to the first magnet 3 is made sensitive to a Hall element sensor 6, and a switching element is driven by the signal to drive the coil. The current is intermittent to generate vibration.
[Selection diagram] Fig. 1

Description

The present invention relates to a vibration generator used for a vibration knife or the like.

FIG. 3 shows a vibration generator having a conventional oscillator, in which an alternating current output from the oscillator 17 is passed through the coil 2, and the magnet 3 vibrates due to the generated magnetic force to extract vibration energy from the rod 4.
When an object with mass is connected to the rod 4 and the natural frequency changes, the frequency of the oscillator is adjusted to maintain the resonance state and the maximum amplitude is used.

As a problem, in FIG. 3, since the natural frequency changes each time depending on the mass connected to the rod 4, the maximum amplitude cannot be obtained unless the frequency of the oscillator 17 is changed. Therefore, fine adjustment of the oscillator is required each time.

The present invention is a vibration generator that vibrates by the interaction of the magnetic force between the magnetic material and the magnetic field generated by the current flowing through the coil, and the current flowing through the coil is interrupted by the Hall element and switching element attached to the vibrating body and the vibrating body. , It is intended to continue the vibration.

In order to continue the vibration, a mechanical contact has been conventionally used for current interruption. In the present invention, a Hall element and a switching element such as a transistor are used for this, and normal current interruption due to a contact failure such as a mechanical contact can be performed. It is possible to vibrate for a long time by avoiding the fact that it becomes impossible and the vibration cannot be continued.

It is a figure which shows the 1st Example of this invention. It is a side view of the 1st Example of this invention. It is a figure which shows the conventional vibration generator.

In FIGS. 1 and 2, two bobbin holding plates 8 are arranged on the frame 9 at predetermined intervals. The bobbin 1 is arranged so as to be sandwiched between the bobbin holding plates 8. A hole is formed in the center of the bobbin holding plate 8, and the shaft 4 is passed through this hole. A space for holding the first magnet 3 is provided around the middle of the shaft 4, and the magnet 3 is stored.
A second magnet 5 is attached to one end of the shaft 4, and a Hall element sensor 6 is arranged so as to cause a magnetic reaction by the second magnet 5 so as to face the second magnet 5. A coil 2 for generating a magnetic force is wound around the bobbin 1. Spring 7s are inserted at both ends of the first magnet 3 and arranged so that the first magnet 3 is located in the middle of the coil.
A blade holder 10 and a knife 11 are attached to the tip opposite to the shaft 4.

1 and 2 are an embodiment of the present invention, and FIG. 2 is a side view of a mechanical portion of FIG.
In FIG. 1, the bobbin holding plate 8 is mounted on the frame 9 which is the base portion of the main body, and the holding plate 8 is provided with a hole through which the shaft 4 penetrates. A coil 2 is wound around the bobbin 1, and a first magnet 3 is coaxially arranged in the center of the shaft 4. Further, the shaft 4 is passed through the hole of the bobbin holding plate 8, the first magnet 3 is sandwiched by the spring 7, and the first magnet 3 is adjusted so as to be in the center of the coil 2. A second magnet 5 is attached to one end of the shaft 4, and a Hall element sensor 6 is arranged so as to face the second magnet 5. The Hall element sensor 6 is attached so that the distance between the second magnet 5 and the Hall element sensor 6 is a distance at which the Hall element sensor 6 reacts due to the magnetic force.
Further, a knife cage 10 is attached to the opposite end of the shaft 4, and a knife 11 is attached to the cage.
A switching circuit 12 is provided for the vibrating knife configured as described above, connected to the coil 2 via the output line lead wire 15, and the DC power supply 13 is connected to the switching circuit 12 via the power supply line 16. At this time, the switching circuit 12 is configured to be turned on by the signal of the Hall element sensor 6, and the coil 2 is energized.
The first magnet 3 receives a force due to the energization of the coil, and the direction of the current to the coil 2 is determined so that the second magnet 5 approaches the Hall element sensor 6. When the second magnet 5 approaches the Hall element sensor 6 up to a certain distance, the signal of the Hall element sensor 6 acts on the switching circuit 12 via the Hall sensor lead wire 14 to turn off the switch, whereby the coil current is cut off and the second magnet is turned off. When the force received by the 1 magnet 3 disappears and the 1st magnet 3 moves away from the Hall element sensor 6 together with the shaft 4, the switching element in the switching circuit 12 is turned on again and a current flows through the coil 2, which turns it on and off. Will be repeated and cause vibration.
In addition, another coil is placed on the bobbin, and a third magnet is placed on the other side of the shaft 4, another Hall element sensor facing the third magnet, and another switching circuit are used in combination with the two coils alternately. By switching the current, the interaction between the magnetic force generated by the excitation of each coil and the magnetic force of the first magnet makes it possible to obtain a large stroke, which enables efficient cutting, etc., and by changing the position of the Hall element sensor, the vibrating body It is possible to change the stroke.

By using the vibrating knife of the present invention for the cutting part of an industrial automatic machine for continuously cutting sheet-shaped paper or resin foam molded products, it is possible to construct a cutting part with a simple structure and low cost. Is.

1 Bobbin 2 Coil 3 1st magnet 1
4 Axis 5 2nd Magnet 6 Hall Element Sensor 7 Spring 8 Bobbin Holding Plate 9 Frame 10 Knife Cage 11 Knife 12 Switching Circuit 13 DC Power Supply 14 Hall Element Sensor Conductor 15 Output Line Conductor 16 Power Line Conductor 17 Oscillator

Claims (3)

A coil, a shaft fitted in a through hole of the coil and reciprocating, a first magnet mounted on the shaft and arranged in the solenoid coil, and a second magnet mounted on the end of the shaft. A vibration generator including a Hall element sensor arranged at a position in front of the second magnet in the moving direction and a switching means for turning on / off a DC current supplied to the coil by the output of the Hall element sensor. .. The vibration generator according to claim 1, further comprising a spring for urging the first magnet in the moving direction of the first magnet. The second magnet is arranged at one end and the other end of the shaft, respectively, and the Hall element is arranged at a front position facing the second magnet arranged at each end. The vibration generator according to claim 1, wherein the vibration generator is characterized in that.

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