Quadrangular leaf spring and linear vibration motor including same

Patent metadata

Field	Value
Publication number	US-11025145-B2
Application number	US-201916250241-A
Country	US
Kind code	B2
Filing date	Jan 17, 2019
Priority date	Feb 1, 2018
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A quadrangular leaf spring of a quadrangle for generating vibration within a linear vibration motor includes a bottom support having an outer edge of a square form, a top support having a given height with respect to the bottom support and moved up and down by an elastic force of an elastic leg part, and the elastic leg part connected to an inside of the bottom support and upward extended up to the top support. A portion where the elastic leg part and the bottom support are connected is closer to a corner than to a center of each side of the bottom support. A right line of a portion of the elastic leg part connected to the bottom support is extended from the bottom support to the upper side in a concave shape with respect to the center of the leaf spring.

First claim

What is claimed is:

1. A quadrangular leaf spring comprising:
a bottom support having an outer edge of a square form;
a top support having a given height with respect to the bottom support and moved towards and away from the bottom support by an elastic force of an elastic leg part; and
the elastic leg part connected to an inside of the bottom support and upward extended up to the top support,
wherein when seen from a top view of the quadrangular leaf spring, a portion where the elastic leg part and the bottom support are connected to each other is closer to a corner than to a center of each side of the bottom support,
wherein a right line of the portion where the elastic leg part and the bottom support are connected to each other is formed to be concave with respect to a center of the quadrangular leaf spring and extended from the bottom support towards the top support, wherein the right line of the portion indicates a boundary line facing the center of the quadrangular leaf spring,
wherein the elastic leg part is shaped to have curvature throughout a total length thereof.

2. The quadrangular leaf spring of claim 1 , wherein a number of the elastic leg parts is 4.

3. The quadrangular leaf spring of claim 1 , wherein widths L 5 and L 6 of the top support are narrowed toward a connection part of the top support and the elastic leg part to increase the elastic force.

4. A linear vibration motor comprising the quadrangular leaf spring according to claim 1 .

5. The linear vibration motor of claim 4 , wherein a weight positioned within the linear vibration motor has an inside part of a circle and an outside part of a quadrangle.

6. The linear vibration motor of claim 5 , wherein the outside part has a weight protrusion part formed at a central part of each side.

Assignees

• Mplus Co Ltd

Inventors

• Kim Nam Sock
• Park Seok Jun
• Lee Tae Hoon
• Lee Dong Jun

Classifications

• H02K33/16 Primary

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title

• H02K33/02 Primary

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title

• F16F1/185 Primary

  characterised by shape or design of individual leaves (F16F1/22 takes precedence) · CPC title

• F16F1/26

  Attachments or mountings ({F16F1/182, F16F1/22} B60G11/10 take precedence) · CPC title

• F16F1/326

  with a spiral-like appearance · CPC title