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Step motor

A technology for stepping motors and shells, which is applied to electrical components, electromechanical devices, electric components, etc., and can solve problems such as noise and torque drop of stepping motors

Active Publication Date: 2014-07-30
LG INNOTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the housing and / or the bracket bend under the action of an external force, the gap formed between the stator and the rotor formed on the lead screw changes, so that when the lead screw rotates Noise will be produced during this period, or the torque of the stepper motor will drop

Method used

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Embodiment Construction

[0011] figure 1 is a perspective view showing the upper surface of the stepping motor according to the present invention, figure 2 is a perspective view showing the back side of the stepping motor according to the present invention, and image 3 yes figure 1 Horizontal sectional view of section "A" in .

[0012] The following will refer to figure 1 and image 3 The stepping motor and its assembly method of the present invention are described in detail.

[0013] The depicted stepper motor 100 includes a lead screw 130 , a rotor 150 , a stator 140 , a housing 120 and a bracket 110 .

[0014] The stator 140 is formed in a cylindrical shape to be inserted into the rotor 150 , has a coil 142 generating a magnetic field wound on its surface, and is fixed inside the cylindrical housing 120 .

[0015] By supplying power to the coil 142 wound in the stator 140 , the coil 142 generates a magnetic field, and the rotor 150 is rotated by a repulsive force between the magnetic field ...

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PUM

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Abstract

The invention discloses a stepping motor. The stepping motor includes a lead screw; a rotor connected to the outer surface of the lead screw; a fixing piece, the fixing piece includes a stator and a casing opposite to the rotor, One side end of the case is opened to be inserted into the stator and surround the stator; and a bracket having a flat plate-shaped bracket body and a bent portion, wherein the bracket body is mounted with the case , the bent portion is bent from the bracket main body toward the one side end of the housing.

Description

technical field [0001] The invention relates to a stepping motor. Background technique [0002] An Optical Disk Driver (ODD) includes a stepping motor. A stepping motor is installed in the optical disc drive to drive an optical pick-up. Driven by the stepping motor, the optical head moves along the radial direction of the optical disc, and at the same time reads out the data recorded on the disc or records the data into the disc. [0003] Generally speaking, a stepper motor includes a bracket and a housing. The bracket and housing rotatably support one end and the other end of the lead screw. A pair of spools may be mounted inside the housing. A coil is wound on the outer surface of the bobbin, and a tooth yoke is attached to the inner surface of the bobbin. A rotor is secured around the outer surface of a lead screw disposed in the housing. [0004] In the case where the housing is welded to the bracket, the joint strength between the housing and the bracket is reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K37/00H02K5/04
CPCH02K5/24H02K5/15H02K37/14G11B7/08582H02K37/00H02K37/02
Inventor 朴正凡
Owner LG INNOTEK CO LTD