JPH02214458A

JPH02214458A - Pencil dc brushless motor structure

Info

Publication number: JPH02214458A
Application number: JP3555889A
Authority: JP
Inventors: Hideo Hirama; 平間　英生
Original assignee: Seiko Electronic Components Ltd
Current assignee: Seiko Electronic Components Ltd
Priority date: 1989-02-15
Filing date: 1989-02-15
Publication date: 1990-08-27

Abstract

PURPOSE:To directly feed sheet on the outer surface of a rotor by employing a contracted core having no laminated layer structure in a motor section, and composing a motor in which a driving coil is wound in an axial slender manner to have a small diameter and a long axis. CONSTITUTION:After upper and lower contracted cores 7, 8 are subassembled in a shape for holding a driving coil 9 wound in a cylindrical shape therein, they are inserted fixedly in a shaft 1. The coil 9 is led into a circuit block 10 via the hole 6 of the core 8. The coil 9 is wound in an axial slender for generating a torque to have a small diameter and a long axis. The cores 7, 8 are formed in a double cylindrical shape with end faces, and have oppositely triangular projections 11 for cogging of a motor on the outer surface so as to cover each other at the ends, thereby effectively carrying a magnetic flux. The projections 11 coincide in number with the poles of a magnet 5. The projections 11 are disposed oppositely at a distance L12 at an angle T13.

Description

[Detailed description of the invention]

〔産業上の利用分野Ｊ本発明は、ＯＡ機器等の内部に使われる紙送り等に使わ
れる小径長軸のＤＣＣブラシレスモーフ構造に関する。[Industrial Field of Application J] The present invention relates to a DCC brushless morph structure with a small diameter and long axis, which is used for paper feeding inside office automation equipment and the like.

[Summary of the invention] The present invention employs an aperture core without a laminated structure in the motor section and winds the drive coil in an axial direction to form a motor with a small diameter and long axis, and the outer periphery of the rotor section directly feeds the paper. Electronic components are also incorporated into the housing. [Conventional technology]

従来１紙送りロータはシャフトを外部に設置されたモー
タにより、ギアかベルトを介して駆動するものが多い。［発明が解決しようとする課題］上述のごとき、従来技術の構造では、第５図に示すよう
にモータ部に積層コアを使用したり、コアレスモータの
ときでも分散した巻線があるため小径長軸のモータをつ
くるのが難しかったので、第６図のように外部に設置さ
れたモータにより紙送りローラを駆動せねばならなかっ
た。そのため大きなスペースが必要であった０本発明は
かかる問題点を解決するためになされたものであって。モータのロータ外周部が直接紙送りするペンシル型ＤＣ
ブラシレスモータ構造を提供することを目的とする。［課題を解決するための手ｊＵ］本発明の前記目的は、第１図にその構成が示されたペン
シル型ＤＣブラシレスモータ構造により達成される。そ
の構造は積層コアを持たず軸方向に２つに分れる端面の
ある二重円筒の外側の円筒面に上下から張り出した突起
が軸方向にたいしてある傾きをもち、ある距離をおいて
対抗する形状をもち、モータのロータ部の外周が直接紙
送りすることを特徴とするペンシル２　Ｄ　Ｃブラシレ
スモーフ構造である。［作用］本発明によるペンシル型ＤＣブラシレスモータｔＭ　ｉ
ｊ３では、積層コアを使用せず円筒コイルと絞りコア２
例の構成により小径長軸のモータが構成され、ロータ外
周部が直接紙送りするモータ内蔵の紙送りローラとなる
。（実施例１以下本発明の実施例を図面に基づいて説明する。第１図において、モータの回転部すなわちロータは、ベ
アリング２、ヨーク４．マグネット５で構成されていて
、ヨーク４は紙送りローラ３を外部に装着している。こ
れが一つのユニットでロータ部になる。ヨーク４はベア
リング２と介して、シャフトｌの軸上を自在に回転でき
るよう保持されている。ベアリング２はシャツｌ−１に
はめ１−まれた止め輸２０とヨーク４．側ｍ２１で軸方
向固定となっている。ステータ部はシャフト１、絞りコア上７．絞りコア下８
．駆動コイル９５回路ブロック部１０、ホールセンサ１
４．で構成されている。シャツ！・ｌの軸上に絞りコア
上、下を保持固定しているが、絞りコア上７と絞りコア
下８は内部に円Ｈ−１ｉきされた駆動コイル９を保持す
るかたちにサブアセンブルされた後、シャフトｌに挿入
固定されている。また、駆動コイル９は絞りコア下８の
六〇を通って回路ブロック部ＩＯに導かれている。駆動コイル９は小径長軸にし、トルクを出すため細長く
巻かれた形になっている（太い線径で巻数が必要なとき
等）第３図に示すように絞りコア上７と絞りコア下８は端面
のある二重筒型をしているが、外周面はモータのコギン
グ用に対抗する三角形状のでつばり１１があり、軸方向
に組み合わせる時は端部がお互いかぶさりあうようにな
り、６′ｆ１束を有効に運べるようになっている。でっばり１１はマグネソ）−５のし’ｆ、ｌにあわせて
あり、例えばマグネット５が４極であれば絞りコア上、
下のでっばり１１はそれぞれ２ケ所ある。でっばり１１は第３図、第４図に示すように絞りコア上
、下の外側円筒面に沿っており、その形状は三角形をな
し、ある距離Ｌ１２と角度７１３をもって、向き合う形
に配置されている。またホールセンサ１４は第４図に示す位置で、はぼでっ
ばり１１とでっばり１１の中間にセットされ、マグネッ
ト５の漏れ６ｎ束をひろってＮＳを検知する。第１図、第２図に示す回路ブロック部１０は、細いとこ
ろに電子部品１５を詰め込まなければならないので、フ
レキシブル基板１６をシャツｈ　］のまわりに巻き付け
た形状とし、そのまわりに電子部品１５がはんだ付けさ
れた構造になっている。回路ブロック部１０に付けられたホールセンサ１４はマ
グネット５の一部の６６束を拾える場所にセントされて
いる。また、フレキシブル基板１６からでる電源＆１１
７はシャ、フト１の電イ原線導入口１９を通って外部に
導かれる。従って、動作時はシャフト１がハウジング１８に固定さ
れる形になり、紙送りロール３がシャフト・】にたいし
て回転し１紙を送ることが出来る。Ｃ発明の効果Ｊ以上のように本発明によれば、積層コアを使用せず、円
筒コイルと絞りコア２個の構成により、積層コアを使用
したモータや巻線を分散したコアレスモーフより構造が
簡単で、絞りコアはプレスの絞り加工で量産性があり製
造が容易でコストが少なくてすみ、絞りコアを小径長軸
につくるため小径長軸のモータが構成され、ロータ外周
部には紙送りローラが一体に装着されているので、紙送
り用のモータがいらなく、そのためスペースかいらない
という効果を有する。Conventionally, in many cases, a single paper feed rotor has a shaft driven by an externally installed motor via a gear or a belt. [Problems to be Solved by the Invention] As described above, in the structure of the prior art, a laminated core is used in the motor part as shown in FIG. Since it was difficult to create a motor for the shaft, the paper feed roller had to be driven by an external motor as shown in FIG. Therefore, a large space is required.The present invention was made to solve this problem. Pencil type DC where the outer periphery of the motor rotor directly feeds paper
The purpose is to provide a brushless motor structure. [Measures for Solving the Problems] The above objects of the present invention are achieved by a pencil-type DC brushless motor structure whose configuration is shown in FIG. Its structure is that of a double cylinder that does not have a laminated core and has an end face that splits into two in the axial direction.Protrusions protrude from the top and bottom of the outer cylindrical surface at a certain inclination to the axial direction, opposing each other at a certain distance. The Pencil 2DC has a brushless morph structure in which the outer periphery of the rotor part of the motor directly feeds the paper. [Function] Pencil type DC brushless motor tM i according to the present invention
j3 uses a cylindrical coil and aperture core 2 without using a laminated core.
The configuration of the example constitutes a motor with a small diameter and long shaft, and the outer peripheral portion of the rotor serves as a paper feed roller with a built-in motor that directly feeds paper. (Example 1) An example of the present invention will be described below based on the drawings. In Fig. 1, the rotating part of the motor, that is, the rotor, is composed of a bearing 2, a yoke 4, and a magnet 5. The yoke 4 is used for paper feeding. A roller 3 is attached to the outside.This becomes a rotor part as one unit.The yoke 4 is held via a bearing 2 so that it can freely rotate on the axis of the shaft l.The bearing 2 is attached to the shirt l. The stator is fixed in the axial direction by the stopper 20 fitted into the shaft 1 and the yoke 4 side m21.
．． Drive coil 95 circuit block section 10, Hall sensor 1
4. It is made up of. shirt!・The upper and lower aperture cores are held and fixed on the axis of l, but the upper aperture core 7 and the lower aperture core 8 are sub-assembled to hold the drive coil 9 with a circle H-1i drawn inside. After that, it is inserted and fixed onto the shaft l. Further, the drive coil 9 is guided to the circuit block portion IO through the circle 60 under the aperture core 8. The drive coil 9 has a long shaft with a small diameter, and is wound into a long and thin shape to generate torque (when a large wire diameter requires a large number of turns, etc.) As shown in Figure 3, the aperture core upper 7 and the aperture core lower 8 is a double cylinder type with end faces, but the outer circumferential surface has a triangular flange 11 that opposes the cogging of the motor, and when assembled in the axial direction, the ends overlap each other, 6 'f1 bundle can be carried effectively. The protrusion 11 corresponds to the magneto-5's f and l, for example, if the magnet 5 has 4 poles, it will be placed on the aperture core,
There are two protrusions 11 at the bottom. As shown in Figs. 3 and 4, the protrusions 11 are along the outer cylindrical surfaces above and below the aperture core, have a triangular shape, and are arranged facing each other with a certain distance L12 and an angle 713. ing. Further, the Hall sensor 14 is set at the position shown in FIG. 4, between the two protrusions 11, and detects the leakage 6n of the magnet 5 to detect NS. In the circuit block section 10 shown in FIGS. 1 and 2, since the electronic components 15 must be packed into a narrow space, the flexible substrate 16 is wound around the shirt h, and the electronic components 15 are wrapped around it. It has a soldered structure. A Hall sensor 14 attached to the circuit block section 10 is placed at a location where it can pick up 66 bundles of magnets 5. In addition, the power supply &11 coming out from the flexible board 16
7 is guided to the outside through the electric wire introduction port 19 of the shaft and foot 1. Therefore, during operation, the shaft 1 is fixed to the housing 18, and the paper feed roll 3 rotates with respect to the shaft to feed one sheet of paper. C Effects of the Invention J As described above, according to the present invention, the structure is simpler than a motor using a laminated core or a coreless morph in which the windings are distributed, by using a cylindrical coil and two aperture cores without using a laminated core. It is simple, and the drawing core can be mass-produced by drawing with a press, making it easy to manufacture and reducing costs.In order to make the drawing core with a small diameter and long shaft, a motor with a small diameter and long shaft is configured, and a paper feeding mechanism is installed on the outer periphery of the rotor. Since the rollers are integrally mounted, there is no need for a paper feeding motor, which has the effect of not requiring space.

[Brief explanation of the drawing]

第１図は本発明の実施例の全体構成の断面図。第２図は本発明の回路ブロック部の断面図。第３図は本発明の絞り′コア上下の外観図。第４図は本発明の絞りコアとホールセンサの位置関係図
。第５図は従来のＤＣＣブラシレスモーフ断面図。第６図は従来の紙送り４Ｉ４１横の構成図。シャフトベアリング・紙送りローラ・ヨーク・マグネット・穴７　・８　・９　・ｌ　Ｏ・１１　　・ｌ　２　・ｌ　３　・ｌ　４　・ｌ　５　・ｌ　６　・ｌ　７　・ｌ　８　・ｌ　９　・２０　・２　ｌ　・２２　・２３　・２４　・２５　・・・絞りコア上・・絞りコア下・・駆動コイル・・回路ブロック部・・でっばり・・距離Ｌ・・角度Ｔ・・ホールセンサ・・電子部品・・フレキシブル基板・電源線・・ハウジング・・電源線導入口・・止め輪・・側根・積層コア・・巻線・・ベルト・・モータ本発明の紋りコア上下のタト観図第　３　図牧すコアとお−ル辷ン→のイ鉦置関伶躬　４　図FIG. 1 is a sectional view of the overall configuration of an embodiment of the present invention. FIG. 2 is a sectional view of the circuit block portion of the present invention. FIG. 3 is an external view of the upper and lower parts of the aperture core of the present invention. FIG. 4 is a diagram showing the positional relationship between the aperture core and the Hall sensor of the present invention. FIG. 5 is a cross-sectional view of a conventional DCC brushless morph. FIG. 6 is a horizontal configuration diagram of a conventional paper feeder 4I41. Shaft bearing, paper feed roller, yoke, magnet, hole 7, 8, 9, lO, 11, l2, l3, l4, l5, l6, l7, l8, l9, 20, 2 l ・ 22 ・ 23 ・ 24 ・ 25 ・ ... Above the aperture core ... Below the aperture core ... Drive coil ... Circuit block section ... Bulk ... Distance L ... Angle T ... Hall sensor ... Electronic components ...Flexible board, power line, housing, power line inlet, retaining ring, side roots, laminated core, winding, belt, motor Figure 3 Figure 4

Claims

[Claims]

A DC brushless motor for paper feeding does not have a laminated core and has a double cylinder with an end face that splits into two in the axial direction.Protrusions jut out from the top and bottom of the outer cylindrical surface at a certain inclination in the axial direction and at a certain distance. The drive coil is held in a space surrounded by a double cylinder, with opposing shapes at the same time.
The structure of a pencil type DC brushless motor is characterized in that the outer periphery of the rotor part of the motor directly feeds paper.