CN2739872Y

CN2739872Y - Improved miniature motor

Info

Publication number: CN2739872Y
Application number: CN 200420095080
Authority: CN
Inventors: 程保文
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-10
Filing date: 2004-11-10
Publication date: 2005-11-09
Anticipated expiration: 2014-11-10

Abstract

An improved miniature motor relates to a motor structure used for optical disc driver. A circular pit is located among three sets of coil winding which faces a bottom cover. The underside of the pit is positioned inside an iron core and the pit is fixed with a circular commutator segment framework inside. A rotary shaft passes through a center hole in the commutator segment framework. Three fan-shaped commutator segments enclose the rotary shaft and are put on the outer surface of the commutator segment framework, and the inner edge of the commutator segment appears a circular arc shape. The outer edge of each block of commutator segment which is located between adjacent two sets of coil winding has a convex surface which is provided with a through-hole. One end of a contact conductor passes through the through-hole and is welded with the commutator segment, and the other end passes through an insulation sleeve and is welded with a piezoresistor; the sleeve is positioned inside the iron core and is right opposite to the through-hole; the piezoresistor is tubular and is firmly sheathed outside the rotary shaft. The lower part of an optical disk salver has a circular pit which is positioned at a position which surrounds the center shaft hole and a shaft cylinder whose stator is convex outward is inserted inside the pit. A pair of electric brushes are parallel and located respectively on the surface of the bottom cover which is lamellar and on both sides of the pit which is on the top of the shaft; the end part of the electric brushes are respectively fixed on the surface of the bottom cover. The beneficial effect is to reduce height of the motor from the top surface of the optical disk salver to the underside of the bottom cover; the utility model is compact in structure.

Description

A kind of improved micro motor

Technical field

The utility model relates to the motor configuration that a kind of improvement structure, especially CD drive of micro motor are used.

Background technology

The motor that existing CD drive is used, comprise optical disc tray, motor and bottom, higher from end face on the optical disc tray to the height of bottom bottom surface, reason is structurally to have following problem: 1, commutator is in outside the coil windings of rotor, round the motor shaft secured in parallel outside motor shaft; 2, the brush face relative fixed that contacts with commutator of a pair of brush increases the height of low lid on bottom; 3, optical disc tray connects with the axis hole and fixedly the sticking with glue of motor shaft at its center, clings firmly in order to make optical disc tray and motor shaft, must increase the length of the central shaft hole of optical disc tray.

Summary of the invention

The purpose of this utility model be to provide a kind of from end face on the optical disc tray to the less motor configuration of height between the bottom bottom surface.

The technical solution of the utility model is: in the face of between three groups of coil windings of bottom a circular pit is being arranged, its bottom surface is in the iron core, commutator segment skeleton in a circle of circular pit internal fixation, the central shaft hole of commutator segment skeleton is passed in rotating shaft, three are fan-shaped and inner edge is that the commutator segment of circular arc lies on the commutator segment skeleton outer surface round rotating shaft, there is projecting surface the outside that every commutator segment is between two groups of adjacent coil windings, through hole is arranged on the projecting surface, one of one contact conductor is passed through hole and commutator segment welding, the other end pass one over against through hole and be in insulating sleeve in the iron core, with one be fixed in the piezo-resistance welding that rotating shaft is tubular outward; One circular depressed is being arranged around central shaft hole at the bottom of optical disc tray, and the beam barrel that stator outwards protrudes is inserted in wherein; On the parallel bottom surface that lies in respectively in the form of sheets of a pair of brush and the both sides of caving on the axle top, its rear is separately fixed on the bottom surface.

The beneficial effects of the utility model are: reduce motor from the optical disc tray end face to the height between the bottom bottom surface, compact conformation.

Description of drawings

Fig. 1 is a stereogram of the present utility model

Fig. 2 is a structural representation of the present utility model

Fig. 3 is the position view of commutator segment in rotor

Fig. 4 is that the A-A of Fig. 3 is to cutaway view

Fig. 5 is optical disc tray and stator fit structure schematic diagram

Fig. 6 is the structural representation of bottom and a pair of brush

Embodiment

From Fig. 1 to Fig. 6, the utility model comprises optical disc tray 1, stator 2, rotor 3, commutator segment 4, a pair of brush 5, bottom 6, rotor 3 is in the stator 2, the beam barrel that rotating shaft 3-1 passes stator 2 tops is inserted in the axis hole of optical disc tray 1, affixed rotating shaft 3-1 of glue and optical disc tray 1 are arranged, bottom 6 is affixed at the lower end and the stator 2 of stator 2, it is characterized in that: between three groups coil windings 3-4 of bottom 6, a circular pit is being arranged, the bottom surface of circular pit is in the surface of second lamination in the iron core, in circular pit, fix the commutator segment skeleton 3-5 of a circle, rotating shaft 3-1 passes the central shaft hole of commutator segment skeleton 3-5 and affixed with commutator segment skeleton 3-5, three are fan-shaped and inner edge is that the commutator segment 4 of circular arc lies on the commutator segment skeleton 3-5 outer surface round main shaft 3-1, between two adjacent commutator segments and gapped between every commutator segment and the rotating shaft, the center line of every commutator segment is consistent with the center line between adjacent two groups of coil windings 3-4, there is the projecting surface of arc the outside of every commutator segment between two groups of adjacent coil windings, projecting surface has through hole 4-1, intrinsic insulating sleeve 3-7 in the iron core of through hole 4-1, contact conductor 3-8 passes insulating sleeve 3-7, one end is by insulating trip 3-9 and through hole 4-1 and commutator segment 4 welding, and the other end is by insulating trip 3-10 and a cylindrical circular piezo-resistance 3-11 welding that is enclosed within outside the rotating shaft 3-1; In the bottom of optical disc tray 1, around its central shaft hole, a rounded depression 1-1 is being arranged, the beam barrel that stator 2 outwards protrudes is inserted among the depression 1-1; Bottom 6 is a sheet, the position has the equal circular hole of two segment length and one section long circular arc limit to surround a round 6-1 in the middle, the home position of circle 6-1 has an axle head pit 6-2, the top of rotating shaft 3-1 is inserted in wherein, a pair of brush 5 parallel lying on the bottom 6, and being in the outer both sides of axle head pit 6-2 respectively, a pair of brush 5 rears are separately fixed on the bottom 6, and connect lead from the end of its rear.

For commutator segment 4 can be fixed on the commutator segment skeleton 3-5, on the circumferential periphery of commutator segment skeleton 3-5 and the axis hole circumferential edge surface annular groove is arranged respectively, the outer inner rim of commutator segment 4 is inserted in respectively in these two annular grooves.

In order to make stator 2 fixing with bottom 6, there are three breach the shell bottom of stator 2, and there are 3 sections circular arcs stator 2 shell bottoms, and wherein two sections short arc sections are inserted in two sections circular holes on the bottom 6, and bigger arc section is in outside the orthodrome limit of bottom 6.

In order to increase iron core excircle area, thereby improve the effective torque coefficient of motor, two laminations of outside, iron core both sides, its periphery have a bit ofly to be gone up crooked to its surface.

In order to make optical disc tray 1 and rotating shaft 3-1 bonding firmly, six radial groove 1-2 vertically evenly distribute on the axis hole inner cylinder face of optical disc tray 1.

Claims

1, a kind of improved micro motor, comprise optical disc tray (1), stator (2), rotor (3), commutator segment (4), a pair of brush (5), bottom (6), rotor (3) is in the stator (2), the beam barrel that stator (2) top is passed in rotating shaft (3-1) is inserted in the axis hole of optical disc tray (1), affixed rotating shaft of glue (3-1) and optical disc tray (1) are arranged, bottom (6) is affixed at the lower end and the stator (2) of stator (2), it is characterized in that: between three group coil windings (3-4) of bottom (6), a circular pit is being arranged, the bottom surface of circular pit is in the surface of second lamination in the iron core, in circular pit, fix the commutator segment skeleton (3-5) of a circle, the central shaft hole of commutator segment skeleton (3-5) and affixed with commutator segment skeleton (3-5) is passed in rotating shaft (3-1), three are fan-shaped and inner edge is that the commutator segment (4) of circular arc lies on commutator segment skeleton (3-5) outer surface round main shaft (3-1), between two adjacent commutator segments and gapped between every commutator segment and the rotating shaft, the center line of every commutator segment is consistent with the center line between adjacent two groups of coil windings (3-4), there is the projecting surface of arc the outside of every commutator segment between two groups of adjacent coil windings, projecting surface has through hole (4-1), over against the interior intrinsic insulating sleeve (3-7) of the iron core of through hole (4-1), contact conductor (3-8) passes insulating sleeve (3-7), one end is by through hole insulating trip (3-9) and through hole (4-1) and a commutator segment (4) welding, and the other end is enclosed within outer cylindrical circular piezo-resistance (3-11) welding of rotating shaft (3-1) by insulating trip (3-10) with one; The bottom stator (2) of optical disc tray (1) with the limit, around its central shaft hole, a rounded depression (1-1) is being arranged, the beam barrel that stator (2) outwards protrudes is inserted in the depression (1-1); Bottom (6) is a sheet, the position has the equal circular hole of two segment length and one section long circular arc limit to surround a circle (6-1) in the middle, the home position of circle (6-1) has an axle head pit (6-2), the top of rotating shaft (3-1) is inserted in wherein, a pair of brush 5 parallel lying on the bottom 6, and being in the outer both sides of axle head pit 6-2 respectively, a pair of brush (5) tail end is separately fixed on the bottom (6), and connects lead from the end of its tail end.

2, a kind of improved micro motor according to claim 1 is characterized in that: on the circumferential periphery of commutator segment skeleton (3-5) and the axis hole circumferential edge surface annular groove is arranged respectively, the outer interior circular arc of commutator segment (4) is inserted in respectively in these two cannelures.

3, a kind of improved micro motor according to claim 1, it is characterized in that: there are three breach the shell bottom of stator (2), there is (3) section circular arc stator (2) shell bottom, wherein two sections short arc sections are inserted in two sections circular holes on the bottom (6), and bigger arc section is in outside the orthodrome limit of bottom (6).

4, a kind of improved micro motor according to claim 1 is characterized in that: six radial grooves (1-2) vertically evenly distribute on the axis hole inner cylinder face of optical disc tray (1).

5, a kind of improved micro motor according to claim 1 is characterized in that: two laminations of outside, iron core both sides, its periphery have a bit of upward crooked to its surface.