HORIZONTAL VIBRATION MOTOR

• US 20120049660A1
• Filed: 08/31/2011
• Published: 03/01/2012
• Est. Priority Date: 09/01/2010
• Status: Active Grant

• Current Assignee: Em-Tech Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: PARK, Youngil
• Granted Patent: US 8,829,741 B2
• Time in Patent Office: Days
• US Class Current: 310/25
• CPC Class Codes: B06B 1/045 using vibrating magnet, armature or coil system
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: H02K 33/16 with polarised armatures moving in alternate directions by reversal or energisation of a single coil system

Abstract

Disclosed is a horizontal vibration motor, the motor including a stator having a coil block secured to a bottom plate of a case, a vibrator having magnets placed above the coil block and a weight holding the magnets, a first elastic member having a first elastic plate secured to portion of the case corresponding to a first corner of the weight, a second elastic plate bent inwards from the first elastic plate, and a third elastic plate bent outwards from the second elastic plate and secured to portion around a second corner, and a second elastic member having a fourth elastic plate secured to portion of the bottom plate corresponding to a third corner, a fifth elastic plate bent inwards from the fourth elastic plate, and a sixth elastic plate bent outwards from the fifth elastic plate and secured to a fourth corner.

Claims

1. A horizontal vibration motor, comprising:

a stator including a coil block that is secured to a bottom plate of a case;

a vibrator including magnets placed above the coil block, and a weight holding the magnets, the weight having a shape of a rectangular frame;

a first elastic member including a first elastic plate secured to portion of the case corresponding to a first corner of the weight, a second elastic plate bent inwards from the first elastic plate, and a third elastic plate bent outwards from the second elastic plate and secured to portion around a second corner that is adjacent to the first corner; and

a second elastic member including a fourth elastic plate secured to portion of the bottom plate corresponding to a third corner that is located in a diagonal direction of the first corner, a fifth elastic plate bent inwards from the fourth elastic plate, and a sixth elastic plate bent outwards from the fifth elastic plate and secured to a fourth corner that is located in a diagonal direction of the second corner,

wherein a first gap between the first and second elastic plates or between the fourth and fifth elastic plates is wider than a second gap between the second and third elastic plates or between the fifth and sixth elastic plates.

2. The horizontal vibration motor as set forth in claim 1, wherein the first gap is smaller than a size of amplitude of the vibrator.

3. The horizontal vibration motor as set forth in claim 1, wherein the first gap is two to three times larger than the second gap sizewise.

4. The horizontal vibration motor as set forth in claim 1, wherein the second and fifth elastic plates are driven by first displacement, and the first and fourth elastic plates are driven by second displacement that is smaller than the first displacement.

5. The horizontal vibration motor as set forth in claim 1, wherein each of the first and second elastic members is formed in shape of a band, length of which is larger than width thereof, the first and second elastic members being placed to be perpendicular to the bottom plate.

6. The horizontal vibration motor as set forth in claim 1, wherein the first to third elastic plates are placed to be parallel to each other, and the fourth to sixth elastic plates are placed to be parallel to each other.

7. The horizontal vibration motor as set forth in claim 1, wherein the stator is mounted to the weight to prevent leakage of a magnetic field from the magnets.

8. A horizontal vibration motor, comprising:

a stator including a coil block that is secured to a bottom plate of a case;

a vibrator including magnets placed above the coil block, and a weight holding the magnets, the weight having a shape of a rectangular frame;

a first elastic member including a first elastic plate secured to portion of the case corresponding to a first corner of the weight, and a second elastic plate bent inwards from the first elastic plate and secured to the first corner; and

a second elastic member including a third elastic plate secured to portion of the case corresponding to a second corner that is located in a diagonal direction of the first corner, and a fourth elastic plate bent inwards from the third elastic plate and secured to the second corner,

wherein a first gap between the first and second elastic plates or between the third and fourth elastic plates is wider than a second gap between the second elastic plate and a first side surface of the weight facing the second elastic plate or between the fourth elastic plate and a second side surface of the weight facing the fourth elastic plate.

9. The horizontal vibration motor as set forth in claim 8, wherein each of the first and second elastic members is formed in shape of a band, length of which is larger than width thereof, the first and second elastic members being placed to be perpendicular to the bottom plate.

10. The horizontal vibration motor as set forth in claim 8, wherein the first gap is smaller than a size of amplitude of the vibrator.

11. The horizontal vibration motor as set forth in claim 8, wherein the first gap is two to three times larger than the second gap sizewise.

12. The horizontal vibration motor as set forth in claim 8, wherein the second and fourth elastic plates are driven by first displacement, and the first and third elastic plates are driven by second displacement that is smaller than the first displacement.

13. The horizontal vibration motor as set forth in claim 8, wherein each of the first and third elastic plates comprises a coupling part that extends parallel to the bottom plate and is coupled to the bottom plate.

14. The horizontal vibration motor as set forth in claim 8, wherein the stator comprises a yoke plate mounted to the weight to prevent leakage of a magnetic field of the magnets.