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Step-by-step motor

A stepper motor and housing technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of increasing the interval between the excitation coil and the rotor, increasing the size of the motor, unfavorable strength, etc., to prevent interference. Effect

Inactive Publication Date: 2004-09-22
CALSONIC KANSEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the thin thickness of the part protruding from the bottom of the case that accommodates the rotor and the field coil is not good for the strength.
If the thickness dimension of the protrusion is increased in order to increase its strength, since the protrusion is inserted between the field coil and the rotor, increasing the thickness dimension of the protrusion will lead to an increase in the interval between the field coil and the rotor and a decrease in performance
The distance between the excitation coil and the rotor increases as a result of the increase in the size of the motor itself

Method used

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Embodiment Construction

[0018] The features of the present invention will be described in detail below based on the illustrated embodiments.

[0019] figure 1 Represents the main part of the stepping motor of the present invention, but in accordance with figure 1 Before explaining, first refer to Figure 2 and image 3 The overall structure of the stepping motor is described below.

[0020] As shown in the exploded perspective view of Figure 2, the stepping motor 10 of the present invention includes: a housing 11 (11a, 11b) and a rotor 12 and a stator 13 housed in the housing, and in the illustrated example a reduction gear train 14 ( 14a to 14d) are assembled in the case 11.

[0021] The case 11 can be divided into an upper case part 11a and a lower case part 11b made of a synthetic resin material. The two case parts 11a and 11b are integrated by engaging the engaging part 15a provided on the upper case part 11a with the protrusion part 15b provided on the lower case part 11b to constitute the ca...

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Abstract

A stepping motor includes a housing, a rotor and a stator received in the housing. The stator includes a yoke, which includes a frame portion surrounding the rotor and a plurality of projections projecting from the frame portion toward the rotor, cylindrical magnetizing coils inserted around the projections, respectively. Each of the magnetizing coils is adapted to receive supply of a pulse current, wherein an inner wall of the housing is formed with concaved portions to receive said magnetizing coils inserted around the respective projections, while being kept spaced from the rotor.

Description

technical field [0001] The present invention relates to a stepping motor, and in particular, relates to a stepping motor suitable for use as a driving device for an indicator instrument for a vehicle. Background technique [0002] In the stepping motor, by controlling the pulse current supplied to the stator excitation coil, the action of the rotor that is rotated by the magnetic attraction and repulsion between the stator and the stator can be controlled. [0003] In a small stepping motor assembled as a driving source in an indicator instrument for a vehicle, the rotor is composed of circular permanent magnets with different magnetic poles arranged alternately in the circumferential direction, and the stator is composed of a yoke with a field coil. The yoke has a frame portion arranged to surround the permanent magnets of the rotor, and a plurality of protrusions extending from the frame portion toward the magnetic pole surfaces of the permanent magnets. Field coils are p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/08H02K7/116H02K37/14
CPCH02K37/14H02K5/08H02K7/116
Inventor 阿部尚太郎高桥英之
Owner CALSONIC KANSEI CORP