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Vibration motor

A technology for vibrating motors and casings, which is applied to electric components, electrical components, electromechanical devices, etc., and can solve problems such as the limitation of the rotation radius of weights

Inactive Publication Date: 2007-10-17
COPAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the vibration motor described in Patent Document 2, since the expanded bottom obstructs the weight, the radius of rotation of the weight is limited, and the weight has to be miniaturized.

Method used

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Examples

Experimental program
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Embodiment Construction

[0028] Next, preferred embodiments of the vibration motor of the present invention will be described in detail with reference to the drawings.

[0029] As shown in Figures 1 to 4, the vibration motor 1 is a small vibration motor surface-mounted on the printed circuit board PWB by reflow soldering, and has a motor part A and a cage 3. The motor part A has a diameter of about 4mm, A cylindrical case 2 with a length of about 10 mm, a cage 3 having a cylindrical shape and a rectangular cross-section, is pressed into the cylindrical case 2 inside.

[0030] The cylindrical case 2 includes a metallic cylindrical case portion 4 and a resin bracket 6 press-fitted into an open rear end of the case portion 4 . A neck portion 4a having a reduced diameter and projecting is formed on the front end side of the housing portion 4, and a part of the rotation shaft 7 protrudes from the front end of the neck portion 4a. A weight 8 with a fan-shaped cross section is fixed eccentrically by rivetin...

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PUM

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Abstract

The present invention provides a vibration motor having a tubular case, a shaft protruding from a front end of the case, a weight eccentrically fixed to an end of the shaft, and a metallic holder surrounding the case, the holder being surface-mounted on a wiring board by reflow-soldering, wherein the holder has a planate bottom placed on the wiring board, a pair of forward tilting prevention portions that extends up to a position facing the weight is formed at the bottom, a notch is provided on a center line extending along the bottom between the forward tilting prevention portions, and the notch extends from the front end of the forward tilting prevention portions beyond the position facing the weight.

Description

technical field [0001] The present invention relates to a vibration motor used as a vibration generating source incorporated in various communication devices (for example, mobile phones), game devices, massage machines, and the like. Background technique [0002] The vibration motor has, for example, a substantially cylindrical case that is long in the direction of the rotation axis of the rotating shaft, and a weight is eccentrically fixed to the front end of the rotating shaft protruding from the front end of the case. The rotor and the stator are accommodated in the case. The coils of the rotor are connected to the commutator, and the brushes are in sliding contact with the commutator. The terminals are connected to the brushes, and the terminals protruding from the outside of the housing are in contact with the conductors on the printed circuit board to obtain power supply. In this way, current flows through the coil from the terminal through the brush and the commutat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/065H02K23/00
CPCH02K5/225H02K7/061H02K5/00H02K2211/03H02K7/075H02K7/065
Inventor 铃木和寿生川昇
Owner COPAL CO LTD
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