VIBRATION GENERATION MODULE CAPABLE OF GENERATING INERTIAL AND IMPACT VIBRATIONS

• US 20100283331A1
• Filed: 10/21/2009
• Published: 11/11/2010
• Est. Priority Date: 05/07/2009
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: KWON, Dong Soo, YANG, Tae Heon
• Granted Patent: US 8,004,124 B2
• Time in Patent Office: Days
• US Class Current: 310/17
• CPC Class Codes: B06B 1/045 using vibrating magnet, armature or coil system

Abstract

Disclosed herein is a vibration generation module capable of generating inertial and impact vibrations. The vibration generation module includes a magnetic force generation unit, an elastic force provision unit, a permanent magnet, a contactor, and an impact transmission panel. The permanent magnet is configured such that when periodic electrical energy having a specific duty or voltage is supplied to the magnetic force generation unit, the permanent magnet alternates between a position in which the permanent magnet is completely spaced apart from the magnetic force generation unit and a completely lowered position in which the permanent magnet collides with an upper surface of the magnetic force generation unit, and such that periodic electrical energy having another specific duty or voltage is supplied to the magnetic force generation unit, the permanent magnet alternates between a position in which the permanent magnet is partially spaced apart from the magnetic force generation unit and a partially lowered position in which the permanent magnet is close to the upper surface of the magnetic force generation unit.

Claims

1. A vibration generation module capable of generating inertial and impact vibrations, comprising:

a magnetic force generation unit made of magnetic material to generate magnetic force when electrical energy is supplied from an external source;

an elastic force provision unit fixedly mounted above the magnetic force generation unit, and configured to provide elastic force in a vertical direction;

a permanent magnet coupled to the elastic force provision unit, and configured such that when electrical energy is not supplied to the magnetic force generation unit, the permanent magnet is lowered to a position in contact with or near an upper surface of the magnetic forte generation unit by its own magnetic force, so that the elastic force provision unit enters a state of holding elastic restoring force, such that when periodic electrical energy having a duty or voltage higher than a reference value is supplied to the magnetic force generation unit, the permanent magnet alternates between a position in which the permanent magnet is completely spaced apart from the magnetic force generation unit and a completely lowered position in which the permanent magnet collides with an upper surface of the magnetic force generation unit, thereby generating impact vibrations, and such that periodic electrical energy having a duty or voltage lower than a reference value is supplied to the magnetic force generation unit, the permanent magnet alternates between a position in which the permanent magnet is partially spaced apart from the magnetic force generation unit and a partially lowered position in which the permanent magnet is close to the upper surface of the magnetic force generation unit, thereby generating inertial vibrations;

a contactor fastened to one side of the permanent magnet, and configured to be selectively raised and lowered as the permanent magnet is moved; and

an impact transmission panel configured to collide with a front end of the contactor and generate impact when the permanent magnet is moved to the completely raised position.

2. The vibration generation module as set forth in claim 1, wherein the magnetic force generation unit is formed of a bobbinless solenoid coil, and a base plate made of magnetic material is disposed on a lower surface of the bobbinless solenoid coil.

3. The vibration generation module as set forth in claim 2, wherein the base plate is provided on an upper surface thereof with a magnetic core which protrudes inside the bobbinless solenoid coil.

4. The vibration generation module as set forth in claim 1, wherein the elastic force provision unit is formed of a plate shape, and has a fastening hole configured to be tightly fitted around the contactor and a slot provided around the fastening hole and configured to be elastically deformed.

5. The vibration generation module as set forth in claim 1, wherein the impact transmission panel is provided on an outside surface of an electronic device.

6. The vibration generation module as set forth in claim 1, wherein the magnetic force generation unit is formed of a solenoid coil.

7. The vibration generation module as set forth in claim 1, wherein the magnetic force generation unit is provided on an upper surface thereof with a soundproof limiter.

8. The vibration generation module as set forth in claim 1, wherein the periodic electrical energy is electrical energy the polarities of which alternate with each other.