JP4551672B2 - Clock step motor rotor - Google Patents

Clock step motor rotor Download PDF

Info

Publication number
JP4551672B2
JP4551672B2 JP2004056984A JP2004056984A JP4551672B2 JP 4551672 B2 JP4551672 B2 JP 4551672B2 JP 2004056984 A JP2004056984 A JP 2004056984A JP 2004056984 A JP2004056984 A JP 2004056984A JP 4551672 B2 JP4551672 B2 JP 4551672B2
Authority
JP
Japan
Prior art keywords
rotor
shaft
magnet
seat
step motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2004056984A
Other languages
Japanese (ja)
Other versions
JP2005249433A (en
Inventor
和男 野口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP2004056984A priority Critical patent/JP4551672B2/en
Publication of JP2005249433A publication Critical patent/JP2005249433A/en
Application granted granted Critical
Publication of JP4551672B2 publication Critical patent/JP4551672B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Electromechanical Clocks (AREA)

Description

本発明は、時計用ステップモータのロータにおいてのロータ軸上のロータ磁石固着手段に関するものである。   The present invention relates to a rotor magnet fixing means on a rotor shaft in a rotor of a time step motor.

従来の時計用ステップモータのロータは、ロータ軸とロータ軸に装着されるリング状のロータ磁石と、ロータ軸と径方向で係合すると共にロータ磁石をロータ軸の軸方向に保持する板状のロータ座で構成している。この円板状のロータ座の使用はロータ磁石の割れ、およびロータ磁石の保持力の低下を招く結果になっている。   A rotor of a conventional timepiece stepping motor has a plate-like rotor magnet that is engaged with the rotor shaft in a radial direction while holding the rotor magnet in the axial direction of the rotor shaft. It consists of a rotor seat. Use of this disk-shaped rotor seat results in cracking of the rotor magnet and a reduction in the holding power of the rotor magnet.

ところで、時計用ステップモータのロータのロータ磁石の割れ、ロータ磁石の保持力の低下を防止する構造は従来より多くの出願を見るところである(例えば特許文献1参照。)。   By the way, a structure for preventing cracking of the rotor magnet of the rotor of the step motor for a timepiece and a decrease in the holding force of the rotor magnet has seen many applications (see, for example, Patent Document 1).

以下、図2を用いて時計用ステップモータのロータの従来の技術を説明する。
図2は従来の時計用ステップモータのロータの構造を示す断面図である。
Hereinafter, the prior art of the rotor of the time step motor will be described with reference to FIG.
FIG. 2 is a cross-sectional view showing the structure of a rotor of a conventional timepiece stepping motor.

1は、ロータカナ1aとホゾ1bを有し回転軸を構成するロータ軸、2はロータ軸1に装着されるリング状のロータ磁石、4は円板状のロータ座で、ロータ座4はロータ軸1と径方向で係合する軸穴部4aと、ロータ軸1の軸方向でロータ磁石2を支持する支持部4bで構成されている。 Reference numeral 1 denotes a rotor shaft that has a rotor kana 1a and a flange 1b and constitutes a rotating shaft, 2 is a ring-shaped rotor magnet mounted on the rotor shaft 1, 4 is a disk-shaped rotor seat, and the rotor seat 4 is a rotor shaft 1, a shaft hole portion 4 a that engages with the rotor shaft 1 in the radial direction, and a support portion 4 b that supports the rotor magnet 2 in the axial direction of the rotor shaft 1.

次に、従来の時計用ステップモータのロータの組立方法に関して説明をする。図2のように、ロータ軸1にロータ磁石2を挿入後、ロータ軸1にロータ座4のロータ軸1と径方向で係合する軸穴部4aを挿入する。   Next, a conventional method for assembling the rotor of the timepiece step motor will be described. As shown in FIG. 2, after inserting the rotor magnet 2 into the rotor shaft 1, the shaft hole portion 4 a that engages with the rotor shaft 1 of the rotor seat 4 in the radial direction is inserted into the rotor shaft 1.

この状態で、ロータ座4の軸穴部4aをロータ軸1の軸方向に押し込むことにより、ロータ軸1のカナ部1aとロータ座4の支持部4bとは径嵌合によって係止され、これによりロータ磁石2はロータ軸1のカナ部1aとロータ座4の支持部4bとにより挟み込まれ、ロータ軸1上に固着される。   In this state, by pushing the shaft hole portion 4a of the rotor seat 4 in the axial direction of the rotor shaft 1, the pinion portion 1a of the rotor shaft 1 and the support portion 4b of the rotor seat 4 are locked by diameter fitting. Thus, the rotor magnet 2 is sandwiched between the pinion portion 1a of the rotor shaft 1 and the support portion 4b of the rotor seat 4 and is fixed onto the rotor shaft 1.

このように、従来の時計用ステップモータのロータはロータ磁石を剛体と剛体の間に挟みこむタイプであり、考え方がシンプルで一見何ら欠点が存在しないかのように思われている。 Thus, the rotor of the conventional timepiece stepping motor is a type in which the rotor magnet is sandwiched between the rigid bodies, and the idea is simple and it seems that there are no defects at first glance.

実開平5−34204号公報(第3頁、第1図)Japanese Utility Model Publication No. 5-34204 (page 3, Fig. 1)

しかしながら、ロータ座4をロータ軸1の軸方向押し込む時にロータ磁石2割れが発生することがしばしばあり、又、ロータ磁石2割れを気にするあまりロータ磁石2を保持する力が弱くなるという問題を抱えていた。
このように、従来の時計用ステップモータのロータにおいては、ロータ磁石割れが発生したり、ロータ磁石の保持力が弱いという課題があった。
本発明の目的は、ロータ磁石の割れもなく、ロータ磁石を保持する力の強い時計用ステップモータのロータの構造を提供することである。
However, there often may cracking of the rotor magnet 2 occurs when pressing the rotor seat 4 in the axial direction of the rotor shaft 1, also the force for holding the too rotor magnet 2 to worry cracking of the rotor magnet 2 is weakened I had a problem.
As described above, in the rotor of the conventional timepiece step motor, there is a problem that the rotor magnet is broken or the holding force of the rotor magnet is weak.
An object of the present invention is to provide a structure of a rotor of a time step motor for a watch having a strong force for holding the rotor magnet without cracking of the rotor magnet.

本発明は、上記目的を達成するため、ロータカナとホゾ部を有し回転軸を構成するロータ軸と、該ロータ軸に装着されるリング状のロータ磁石と、前記ロータ軸に装着され前記ロータ磁石を保持するロータ座からなる時計用ステップモータのロータにおいて、前記ロ
ータ座は、前記ロータ軸と径方向で係合する軸穴部と、前記ロータ軸の軸方向で前記ロータ磁石をリング状に支持する支持部と、前記軸穴部と前記支持部とを接続するダイヤフラム部とから構成されていて、前記ロータ軸に前記ロータ磁石を挿入後、前記ロータ座の支持部が前記ロータ磁石に接するよう前記ロータ軸に押し込まれた前記軸穴部と、前記ロータ座の前記軸穴部を前記ロータ磁石方向に更に押し込むことにより塑性変形した前記ダイヤフラム部とより成り、前記ロータ軸の前記ロータカナ部と前記ロータ座の前記支持部によって前記ロータ磁石を挟み込んで前記ロータ軸上に固着したことを特徴とする。
In order to achieve the above object, the present invention provides a rotor shaft having a rotor pinion and a ridge portion and constituting a rotating shaft, a ring-shaped rotor magnet mounted on the rotor shaft, and the rotor magnet mounted on the rotor shaft. A rotor of a timepiece step motor comprising a rotor seat that holds the rotor shaft , the rotor seat supporting the rotor magnet in a ring shape in the axial direction of the rotor shaft, and a shaft hole portion that engages with the rotor shaft in a radial direction. a support portion which, be composed of a diaphragm to be connected to the shaft hole and the support portion, after insertion of the rotor magnet to the rotor shaft, so that the supporting portion of the rotor seat is in contact with the rotor magnet said shaft hole pushed into the rotor shaft, more become a said diaphragm portion which is plastically deformed by further pushing the shaft hole of the rotor seat to the rotor magnet direction, the b By the support portion of the rotor pinion portion of the motor shaft and the rotor seat, characterized in that fixed on the rotor shaft by sandwiching the rotor magnet.

このように構成することによって、ロータ軸にロータ磁石を挿入後、ロータ座の軸穴部をロータ軸の軸方向に押し込むだけでロータ磁石の割れを気にすることもなくロータ磁石の固着が可能になり、円板状のロータ座等に比べて非常に短時間で組立が可能で、しかも余分な材料も、余分な時間も必要なくなり、時計用ステップモータのロータのコストダウンを図ることができる。   With this configuration, after inserting the rotor magnet into the rotor shaft, it is possible to fix the rotor magnet without having to worry about cracking of the rotor magnet simply by pushing the shaft hole of the rotor seat in the axial direction of the rotor shaft. As a result, it can be assembled in a very short time compared to a disk-shaped rotor seat, etc., and no extra material or extra time is required, thereby reducing the cost of the rotor of the clock step motor. .

また、前記ロータ座は銅系、又は鉄系金属の材料からなることを特徴とする。   The rotor seat is made of a copper-based or iron-based metal material.

このように構成することによって、ダイヤフラム部を塑性変形させやすくすることで、ロータ磁石の割れを防止し、且つロータ磁石の保持力の向上を計ることができる。   By configuring in this way, the diaphragm portion can be easily plastically deformed, so that the rotor magnet can be prevented from cracking and the holding force of the rotor magnet can be improved.

また、前記ダイヤフラム部の厚さは100μm以下であることを特徴とする。   The thickness of the diaphragm portion is 100 μm or less.

このようにダイヤフラム部の厚さを100μm以下とすることにより、ダイヤフラム部の弾性力が弱くなり、より塑性変形がしやすくなり、その組立性も向上する。   Thus, by setting the thickness of the diaphragm part to 100 μm or less, the elastic force of the diaphragm part becomes weak, the plastic deformation becomes easier, and the assembling property is improved.

本発明の時計用ステップモータのロータは、従来の時計用ステップモータのロータと同じロータ軸とロータ磁石とロータ座で構成されるために、従来と同じ生産方法が使えるので、新技術の導入なしに、時計用ステップモータのロータの組立時におけるロータ磁石の割れの解消、及びロータ磁石の保持力の向上を図ることができる。
また、本発明によれば、生産上の問題点である上記ロータ磁石の割れの解消できることと共に、ロータ磁石の保持力の向上が図ることができるので、信頼性の高い、安価な時計用ステップモータのロータを提供する事ができる。
Since the rotor of the timepiece step motor of the present invention is composed of the same rotor shaft, rotor magnet and rotor seat as the rotor of the conventional timepiece step motor, the same production method as before can be used, so no new technology is introduced. In addition, it is possible to eliminate the cracking of the rotor magnet and improve the holding force of the rotor magnet when the rotor of the time step motor is assembled.
In addition, according to the present invention, the crack of the rotor magnet, which is a problem in production, can be eliminated, and the holding force of the rotor magnet can be improved. Rotors can be provided.

以下、本発明の実施形態に関し図面に基づいて詳細に説明する。
図1は、時計用ステップモータのロータを示す断面図で、図1(a)はロータ軸にロータ磁石を挿入後にロータ座を挿入しただけの状態を示すロータの断面図、図1(b)はロータ座のダイヤフラム部を塑性変形させた状態を示すロータの完成状態を示すロータの断面図である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a rotor of a timepiece step motor. FIG. 1A is a cross-sectional view of a rotor showing a state in which a rotor seat is only inserted after inserting a rotor magnet into the rotor shaft. FIG. 3 is a cross-sectional view of the rotor showing a completed state of the rotor showing a state in which the diaphragm portion of the rotor seat is plastically deformed.

1は、ロータカナ1aとホゾ1bを有し回転軸を構成するロータ軸、2はロータ軸1に装着されるリング状のロータ磁石で、本実施例では希土類磁石より構成されている。3はロータ軸1と径方向で係合する軸穴部3aと、ロータ軸1の軸方向でロータ磁石2をリング状に支持する支持部3bと、軸穴部3aと支持部3bとを接続するダイヤフラム部3cとから構成されたロータ座で、ロータ座3は、本実施例では銅系のPBBF材料から構成
されており、ダイヤフラム部3cの厚さは、80μmのものを採用した。
Reference numeral 1 denotes a rotor shaft that has a rotor kana 1a and a flange 1b and constitutes a rotating shaft. Reference numeral 2 denotes a ring-shaped rotor magnet that is attached to the rotor shaft 1. In this embodiment, the rotor shaft is made of a rare earth magnet. Reference numeral 3 denotes a shaft hole portion 3a that engages with the rotor shaft 1 in the radial direction, a support portion 3b that supports the rotor magnet 2 in a ring shape in the axial direction of the rotor shaft 1, and a shaft hole portion 3a and the support portion 3b. In this embodiment, the rotor seat 3 is made of a copper-based PBBF material, and the diaphragm portion 3c has a thickness of 80 μm.

次に、組立方法に関して説明する。まず、図1(a)のように、ロータ軸1にロータ磁石2を挿入後、ロータ軸1にロータ座3のロータ軸1と径方向で係合する軸穴部3aを挿入する。   Next, the assembly method will be described. First, as shown in FIG. 1A, after inserting the rotor magnet 2 into the rotor shaft 1, the shaft hole portion 3 a that engages with the rotor shaft 1 of the rotor seat 3 in the radial direction is inserted into the rotor shaft 1.

この状態で、図1(b)のように、ロータ座3の軸穴部3aをロータ軸1の軸方向に押し込むことによりダイヤフラム部3cを塑性変形させる。この結果、ロータ軸1のカナ部1aと、ロータ座3の支持部3bと軸穴部3aとによってロータ磁石は挟み込まれ、ロータ軸1上に固着される。   In this state, the diaphragm 3c is plastically deformed by pushing the shaft hole 3a of the rotor seat 3 in the axial direction of the rotor shaft 1 as shown in FIG. As a result, the rotor magnet is sandwiched between the pinion portion 1 a of the rotor shaft 1, the support portion 3 b of the rotor seat 3 and the shaft hole portion 3 a, and is fixed onto the rotor shaft 1.

なお、本実施例ではロータ座3を銅系のPBBF材料としたが、鉄系金属の材料であるSK4Fで形成しても良い。また、ダイヤフラム部3cの厚みを、80μmとしたが、100μm以下であれば、塑性変形時の抵抗が少なく、組立が容易となる。   In this embodiment, the rotor seat 3 is made of a copper-based PBBF material, but may be formed of SK4F, which is a ferrous metal material. Moreover, although the thickness of the diaphragm part 3c was 80 micrometers, if it is 100 micrometers or less, there will be little resistance at the time of a plastic deformation, and an assembly will become easy.

本発明の時計用ステップモータのロータの断面図で、(a)はロータ軸にロータ磁石を挿入後にロータ座を挿入しただけの状態を示すロータの断面図、(b)はロータ座のダイヤフラム部を塑性変形させた完成状態を示すロータの断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the rotor of the step motor for timepieces of this invention, (a) is sectional drawing of the rotor which shows the state which only inserted the rotor seat after inserting a rotor magnet in a rotor axis | shaft, (b) is a diaphragm part of a rotor seat It is sectional drawing of the rotor which shows the completion state which was made to plastically deform. 従来の時計用ステップモータのロータの完成状態を示す断面図である。It is sectional drawing which shows the completion state of the rotor of the conventional step motor for timepieces.

符号の説明Explanation of symbols

1 ロータ軸
2 ロータ磁石
3 ロータ座
1 Rotor shaft 2 Rotor magnet 3 Rotor seat

Claims (3)

ロータカナとホゾ部を有し回転軸を構成するロータ軸と、該ロータ軸に装着されるリング状のロータ磁石と、前記ロータ軸に装着され前記ロータ磁石を保持するロータ座からなる時計用ステップモータのロータにおいて、
前記ロータ座は、前記ロータ軸と径方向で係合する軸穴部と、前記ロータ軸の軸方向で前記ロータ磁石をリング状に支持する支持部と、前記軸穴部と前記支持部とを接続するダイヤフラム部とから構成されていて、前記ロータ軸に前記ロータ磁石を挿入後、前記ロータ座の支持部が前記ロータ磁石に接するよう前記ロータ軸に押し込まれた前記軸穴部と、前記ロータ座の前記軸穴部を前記ロータ磁石方向に更に押し込むことにより塑性変形した前記ダイヤフラム部とより成り、前記ロータ軸の前記ロータカナ部と前記ロータ座の前記支持部によって前記ロータ磁石を挟み込んで前記ロータ軸上に固着したことを特徴とする時計用ステップモータのロータ。
A timepiece stepping motor comprising a rotor shaft having a rotor kana and a ridge portion and constituting a rotating shaft, a ring-shaped rotor magnet mounted on the rotor shaft, and a rotor seat mounted on the rotor shaft and holding the rotor magnet In the rotor of
The rotor seat includes a shaft hole portion that engages with the rotor shaft in a radial direction, a support portion that supports the rotor magnet in a ring shape in the axial direction of the rotor shaft, and the shaft hole portion and the support portion. A shaft portion that is configured to be connected to the rotor shaft, and is inserted into the rotor shaft so that a support portion of the rotor seat is in contact with the rotor magnet after the rotor magnet is inserted into the rotor shaft; more become a said diaphragm portion which is plastically deformed by further pushing the shaft hole of the seat to the rotor magnet direction, the sandwich said rotor magnet and the rotor pinion portion of the rotor shaft by the support portion of the rotor seat A rotor of a timepiece stepping motor fixed on a rotor shaft.
前記ロータ座は銅系、又は鉄系金属の材料からなることを特徴とする請求項1に記載の時計用ステップモータのロータ。 2. The timepiece step motor rotor according to claim 1, wherein the rotor seat is made of a copper-based or iron-based metal material. 前記ダイヤフラム部の厚みは100μm以下であることを特徴とする請求項1又は請求項2に記載の時計用ステップモータのロータ。 3. The timepiece step motor rotor according to claim 1, wherein a thickness of the diaphragm portion is 100 μm or less. 4.
JP2004056984A 2004-03-02 2004-03-02 Clock step motor rotor Expired - Fee Related JP4551672B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004056984A JP4551672B2 (en) 2004-03-02 2004-03-02 Clock step motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004056984A JP4551672B2 (en) 2004-03-02 2004-03-02 Clock step motor rotor

Publications (2)

Publication Number Publication Date
JP2005249433A JP2005249433A (en) 2005-09-15
JP4551672B2 true JP4551672B2 (en) 2010-09-29

Family

ID=35030056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004056984A Expired - Fee Related JP4551672B2 (en) 2004-03-02 2004-03-02 Clock step motor rotor

Country Status (1)

Country Link
JP (1) JP4551672B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4851889B2 (en) * 2006-09-01 2012-01-11 シチズンホールディングス株式会社 Clock step motor rotor
JP5928988B2 (en) * 2013-06-05 2016-06-01 カシオ計算機株式会社 Manufacturing method of rotor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS557578U (en) * 1978-06-29 1980-01-18
JPS5772772U (en) * 1980-10-17 1982-05-04
JPH01127378U (en) * 1988-02-19 1989-08-31

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS557578U (en) * 1978-06-29 1980-01-18
JPS5772772U (en) * 1980-10-17 1982-05-04
JPH01127378U (en) * 1988-02-19 1989-08-31

Also Published As

Publication number Publication date
JP2005249433A (en) 2005-09-15

Similar Documents

Publication Publication Date Title
JP5175523B2 (en) Assembly element including fork-shaped elastic structure and watch including the same
JP5137683B2 (en) Coreless motor
WO2002075898A3 (en) Permanent magnet rotor
JP5880136B2 (en) Rotor structure of rotating electrical machine and manufacturing method thereof
JP4551672B2 (en) Clock step motor rotor
JP2010252622A (en) Manufacturing method of recording-disk driving motor, recording-disk driving motor, and recording-disk driving apparatus having the same
JP2000184638A (en) Motor
JPH11299151A (en) Motor
JPWO2018147052A1 (en) Rotor for motor, motor and method for manufacturing motor rotor
JP2022041334A (en) Sensor fixing structure and method
JP4851889B2 (en) Clock step motor rotor
JP6816546B2 (en) Motors and motor manufacturing methods
JP2000274494A (en) Ring gear
JP6753792B2 (en) motor
JP5103000B2 (en) Magnet molding method of rotor core and jig therefor
JP2011024351A (en) Spindle motor, disk drive, and manufacturing method for spindle motor
JP2007236148A (en) Motor
JP2008278597A (en) Rotor core
JP2007097240A (en) Method and structure for fixing rotating disc of encoder in dynamo-electric machine
CN104578623A (en) Motor and punching device unit used for manufacturing motor
JPS58182465A (en) Brushless motor
JP2008312334A (en) Brushless motor
JP3003906B2 (en) Method of manufacturing motor and rotor used for motor
KR200190436Y1 (en) Vibration moter assembry for hand-phone
JP2000092799A (en) Spindle motor and its manufacture

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061201

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100108

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100119

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100302

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20100302

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100629

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100712

R150 Certificate of patent or registration of utility model

Ref document number: 4551672

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130716

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees