JPS6335153A - Manufacture of cylindrical magnet - Google Patents
Manufacture of cylindrical magnetInfo
- Publication number
- JPS6335153A JPS6335153A JP61177411A JP17741186A JPS6335153A JP S6335153 A JPS6335153 A JP S6335153A JP 61177411 A JP61177411 A JP 61177411A JP 17741186 A JP17741186 A JP 17741186A JP S6335153 A JPS6335153 A JP S6335153A
- Authority
- JP
- Japan
- Prior art keywords
- magnet material
- rubber magnet
- cylindrical
- rubber
- magnet
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 42
- 239000005060 rubber Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 239000000126 substance Substances 0.000 abstract 3
- 230000008602 contraction Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Lens Barrels (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、例えばＰＭ形ステッピングモータに用いら
れるマグネットロータ等の円筒状磁石の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a cylindrical magnet such as a magnet rotor used in a PM type stepping motor, for example.
［発明の概要１
この発明は、円筒状磁石の製造方法において、熱収縮性
チューブの加熱収縮により薄板状の゛ゴムマグネット素
材を円筒基体の外周面に接着剤を介して圧着し、該接着
剤の硬化後にゴムマグネット素材に＠極Ｎ、Ｓを交互に
多数着磁するようにしたことにより、低コストでゴムマ
グネット部分を精度よく薄肉化して、円筒状磁石の小形
、軽…化を図ることができるようにしたらのである。[Summary of the Invention 1] This invention is a method for manufacturing a cylindrical magnet, in which a thin plate-like rubber magnet material is crimped onto the outer peripheral surface of a cylindrical base via an adhesive by heat shrinking a heat-shrinkable tube, and the adhesive By magnetizing a large number of N and S poles alternately on the rubber magnet material after curing, the rubber magnet part can be thinned with precision at low cost, making the cylindrical magnet smaller and lighter. We made it possible to do so.
［従来の技術］
例えば、ヒデオカメラのレンズ鏡筒は、該レンズ鏡筒に
内蔵された中空形のＰＭ形ステッピングモータにより光
軸方向に移動して自動的に各レンズのＳ１１点を合わせ
ろことかできろようになっている。これを、第４図によ
って具体的に説明すると、符号１０は二重円筒状のレン
ズ鏡筒てあり、この内筒部１１と、該内筒部１１の外周
面に接着された円筒状のフェライト又はプラスチック製
のマグネット１２とによりマグネットロータＩ３が構成
されている。[Prior Art] For example, the lens barrel of a video camera is moved in the optical axis direction by a hollow PM type stepping motor built into the lens barrel to automatically align the S11 point of each lens. It is now possible to do it. To explain this in detail with reference to FIG. 4, reference numeral 10 denotes a double cylindrical lens barrel, which includes an inner cylindrical portion 11 and a cylindrical ferrite bonded to the outer peripheral surface of the inner cylindrical portion 11. Alternatively, a magnet rotor I3 is constituted by a plastic magnet 12.
そして、１１ｊ記レンズ鏡筒ｌＯの内筒部１【の内周面
と、ステータ鏡筒１４の先端側に構成された環状凹部１
５の内筒部１５ａの外周面とはへリコイト１６によって
回動可能に螺合しである。この環状凹部１５の外筒部１
５ｂと、この外筒部１５ｂの内周面に固着された２相の
コイル１７及び極歯ヨーク１８とでステータ１９が構成
されている。これらマグネットロータ１３とステータ１
９とにより中空形のＰＭ形ステッピングモータが構成さ
れ、前記ステータ鏡筒１４に対してレンズ鏡筒１０が光
軸方向に移動することによりオートフォーカスを行うこ
とができるようになっている。The annular recess 1 formed on the inner circumferential surface of the inner cylinder part 1 of the lens barrel lO described in 11j and on the distal end side of the stator barrel 14
The outer peripheral surface of the inner cylindrical portion 15a of No. 5 is rotatably screwed together by a helicoid 16. Outer cylinder portion 1 of this annular recess 15
5b, a two-phase coil 17 and a pole-toothed yoke 18 fixed to the inner peripheral surface of the outer cylinder portion 15b constitute a stator 19. These magnet rotor 13 and stator 1
9 constitute a hollow PM type stepping motor, and autofocus can be performed by moving the lens barrel 10 in the optical axis direction with respect to the stator barrel 14.
［発明が解決しようとする問題点］
近年のビデオカメラの小形、軽量化に伴い、ビデオカメ
ラの鏡筒部を一段と小形、軽量化ずろことが望まれてい
るが、これには前記マグネットロータ１３のフェライト
又はプラスチック製のマクネット１２の肉厚を薄くする
ことか存効である。しかし、該マグネット１２を切削加
工等により精度よく薄く円筒状に加工して、マグネット
ロータ１３を製造することは錐しく限界があると共に、
コスト高になる不利点があった。[Problems to be Solved by the Invention] As video cameras have become smaller and lighter in recent years, it has been desired to make the lens barrel of the video camera even smaller and lighter. The only effective solution is to reduce the thickness of the ferrite or plastic magnet 12. However, manufacturing the magnet rotor 13 by precisely processing the magnet 12 into a thin cylindrical shape by cutting or the like has its limitations, and
This had the disadvantage of high cost.
そこで、この発明は、薄板状のゴムマグネット素材を使
用して、低コストでマグネット部分を精度よく薄肉化し
て円筒状に形成することができ、モータのマグネットロ
ータ等に用いられる円筒状磁石の製造方法を提供するし
のである。Therefore, the present invention is capable of manufacturing a cylindrical magnet used in a motor's magnetic rotor, etc. by using a thin plate-like rubber magnet material to accurately thin the magnet part and form it into a cylindrical shape at low cost. I will provide a method.
［問題点を解決するための手段］
この発明は、円筒基体の外周面に薄板状のゴムマグネッ
ト素材を接着剤で接着し、このゴムマグネット素材の外
周面側に熱収縮性チューブを挿入し、次にこの熱収縮性
チューブを加熱収縮させて１）！ｊ記ゴムマグネット素
材に圧接さＵ、前記接着剤硬化後ゴムマグネット素材を
着磁するようにした円筒状磁石の製造方法である。[Means for Solving the Problems] The present invention includes bonding a thin plate-shaped rubber magnet material to the outer peripheral surface of a cylindrical base body using an adhesive, inserting a heat-shrinkable tube into the outer peripheral surface of the rubber magnet material, and Next, heat-shrink this heat-shrinkable tube to achieve 1)! j) A method for manufacturing a cylindrical magnet, in which the rubber magnet material is pressed against the rubber magnet material U, and the rubber magnet material is magnetized after the adhesive is cured.
［作用］
薄板状のゴムマグネット素材は、熱収縮性チューブの加
熱収縮により円筒基体の外周面に接着剤を介して均一圧
接状態で接着される。この接着剤硬化後ゴムマグネット
素材に着磁を施すことにより、精度の高い薄肉の円筒状
磁石が製造される。[Function] The thin plate-like rubber magnet material is adhered to the outer circumferential surface of the cylindrical base body with uniform pressure via an adhesive by heating and shrinking the heat-shrinkable tube. After the adhesive has hardened, the rubber magnet material is magnetized to produce a highly accurate thin-walled cylindrical magnet.
［実施例］ 以下、この発明の実施例を図面と共に詳述する。[Example] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図（ａ）において、符号ｌはアルミニウム製（非磁
性）の薄肉円筒基体であり、符号２は矩形薄板状に形成
したゴムマグネット素材である。このゴムマグネット素
材２は、合成ゴムにフェライトの粉末を、例えば全体の
比率からして６割混入し、前記円筒基体ｌの外周面１ａ
の円周と略同じ長さに形成しである。また、第１図（ｂ
）において、符号３は熱収縮性チューブ（例えば、住友
電気工業株式会社、商品名スミチューブ ＶＷ−１等）
であり、面記円筒ｗ体ｌの外周径より大径である。In FIG. 1(a), reference numeral 1 is a thin cylindrical base made of aluminum (non-magnetic), and reference numeral 2 is a rubber magnet material formed into a rectangular thin plate shape. This rubber magnet material 2 is made by mixing synthetic rubber with ferrite powder, for example 60% of the total ratio, and is made by mixing synthetic rubber with ferrite powder, for example, 60% of the total ratio.
The length is approximately the same as the circumference. In addition, Fig. 1 (b
), the code 3 is a heat-shrinkable tube (for example, Sumitomo Electric Industries, Ltd., product name SUMITUBE VW-1, etc.)
, which is larger in diameter than the outer circumferential diameter of the surface cylinder w body l.
次に、円筒状磁石の製造工程を第１図（ａ）、 （ｂ）
。Next, the manufacturing process of the cylindrical magnet is shown in Figures 1 (a) and (b).
.
（ｃ）、第２図に従って順を追って説明する。(c), and will be explained step by step according to FIG.
まず、第１図（ａ）に示すように、円筒基体１の外周面
１ａに接着剤を塗布して、薄板状のゴムマグネット素材
２を接着４−る。そして、第１図（１））に示すように
、１１１１記ｉ？Ｖ板状のゴムマグネット素材２の外周
面２ａに熱収縮性チューブ３を挿入する。First, as shown in FIG. 1(a), an adhesive is applied to the outer circumferential surface 1a of the cylindrical base 1, and a thin plate-shaped rubber magnet material 2 is adhered thereto. Then, as shown in FIG. 1 (1)), 1111 i? A heat-shrinkable tube 3 is inserted into the outer peripheral surface 2a of the V-shaped rubber magnet material 2.
次に、この熱収縮性チューブ３にドライヤ等により熱風
を吹き付けると、第１図（Ｃ）に示すように、該熱収縮
性チューブ３は収縮して小・径になるため、前記ゴムマ
グネット素手４２は外周面２ａ側から均等な押圧力によ
り圧接されて、円筒基体ｌの外周面１ａに接着される。Next, when hot air is blown onto this heat-shrinkable tube 3 using a dryer or the like, the heat-shrinkable tube 3 shrinks and becomes smaller in diameter, as shown in FIG. 1(C). 42 is adhered to the outer circumferential surface 1a of the cylindrical base 1 by being pressed from the outer circumferential surface 2a side with a uniform pressing force.
そして、ｎり配接着剤の硬化後、熱収縮したチューブ３
を取り外すと、ゴムマグネット素（４２は、継ぎ目部分
の両端縁部が浮き上がることなく、精密に接合されて円
筒基体ｌの外周面１ａに、・合って完璧に固着される。After the adhesive has hardened, the tube 3 is heat-shrinked.
When removed, the rubber magnet element (42) is precisely joined to the outer circumferential surface 1a of the cylindrical base 1 without the edges of both ends of the joint portion lifting up, and is perfectly fixed to the outer peripheral surface 1a of the cylindrical base 1.
この状態から着磁装置（図示しない）により前記ゴムマ
グネット素（第２に磁極Ｎ。From this state, a magnetizing device (not shown) removes the rubber magnet element (second magnetic pole N).
Ｓを軸方向に交互に多数着磁すると、第２図に示すよう
に、円筒基体Ｉの外周面１ａｉ、：薄板状のゴムマグネ
ット２人を固着した円筒状磁石４が完成する。By magnetizing a large number of magnets S alternately in the axial direction, a cylindrical magnet 4 is completed, as shown in FIG. 2, on the outer peripheral surface 1ai of the cylindrical base I, to which two thin plate-like rubber magnets are fixed.
このように、円筒基体ｌにゴムマグネット素材２を接着
する場合に、熱収縮性チューブ３を使用することて、ゴ
ムマグネット素（第２の韮ぎ目部分を整合させて完璧に
接着することができるため、高精度の薄肉円筒状のゴム
マグネット２Ａを形成４“ろことかできる。また、円筒
基体ｌにゴムマグネット累（第２を接着して着磁を施す
だけで、製造工程が簡略化されろため、製造コストが低
減する。In this way, when bonding the rubber magnet material 2 to the cylindrical base l, by using the heat-shrinkable tube 3, it is possible to align the rubber magnet material (the second diagonal part and bond it perfectly). Because of this, it is possible to form a highly precise thin-walled cylindrical rubber magnet 2A with 4" holes.In addition, the manufacturing process is simplified by simply gluing the rubber magnet (2) to the cylindrical base l and magnetizing it. Therefore, manufacturing costs are reduced.
また、薄肉の円筒基体ｌに非常に薄いゴムマグネット２
八を固着しであるので、円筒状磁石４の小形。In addition, a very thin rubber magnet 2 is mounted on a thin cylindrical base l.
8 is fixed, so the cylindrical magnet 4 is small.
軽量化が大幅に図られる。Significant weight reduction is achieved.
尚、熱収縮したチューブ３を取り外した後で、ゴムマグ
ネット素（４２の外周面２ａを切削してゴムマグネット
素材２の肉厚をさらに薄くシてもよい。Incidentally, after removing the heat-shrinked tube 3, the outer peripheral surface 2a of the rubber magnet material (42) may be cut to further reduce the thickness of the rubber magnet material 2.
この場合、ゴムマグネット素材２は、フェライト又はプ
ラスチックマグネット等に比較すれば切削等の加工が簡
単であるため、コスト高になることはない。また、熱収
縮したチューブ３を取り付けた状態のままでゴムマグネ
ット素（第２に着磁を施すようにしてもよい。In this case, the rubber magnet material 2 is easier to process, such as cutting, than ferrite or plastic magnets, so the cost will not be high. Alternatively, the rubber magnet element (secondary magnetization may be applied) while the heat-shrinked tube 3 is still attached.
このようにして製造された円筒状磁石４を、ρｊえば第
４図に示すヒデオカメラの鏡筒部に内蔵された中空形の
Ｐ Ｍ形ステッピングモータのマグネットロータ１３と
して用いれば、レンズ鏡筒１０の外径を一段と小径にで
きるため、鏡筒部の小形、軽量化を図ることができろ。If the cylindrical magnet 4 manufactured in this way is used as the magnet rotor 13 of a hollow PM type stepping motor built into the lens barrel of a video camera shown in FIG. Since the outer diameter of the lens can be made even smaller, the lens barrel can be made smaller and lighter.
また、第３図に示す円筒状磁石５は、一端側が閉塞され
た円筒基体ｌΔに、前記実施例と同様にして薄肉のゴム
マグネット２八を固着したものであり、中実形のＰＭ形
ステツビンクモータ等のモータのマグネットロータに用
いられる乙のである。The cylindrical magnet 5 shown in FIG. 3 has a thin rubber magnet 28 fixed to a cylindrical base lΔ with one end closed in the same manner as in the above embodiment, and is made of a solid PM type stem. This is used in the magnetic rotor of motors such as Bink motors.
［発明の効果］
以」二のように、この発明によれば、円筒基体の外周面
に薄板状のゴムマグネット素ｔｉを熱収縮性チューブの
加熱収縮により圧着させ、ゴムマグネツｌ−素材固着後
に該ゴムマグネット素材を着磁するようにしたことによ
り、精度の高い薄肉の円筒状磁石を低コストで製造する
ことができる。これにより磁石全体を小形、軽量化する
ことがてきる。[Effects of the Invention] As described in ``2'' below, according to the present invention, a thin plate-like rubber magnet element ti is crimped onto the outer peripheral surface of a cylindrical base by heat shrinkage of a heat-shrinkable tube, and after the rubber magnet l-material is fixed. By magnetizing the rubber magnet material, highly accurate thin-walled cylindrical magnets can be manufactured at low cost. This allows the entire magnet to be made smaller and lighter.
第１図はこの発明の実施例の円筒状磁石の製造工程を順
を追って示す斜視図であり、第１図（ａ）は円筒基体に
ゴムマグネット累（オを接着する状態を示す斜視図、第
１図（ｂ）は熱収縮性チューブを挿入する状態を示す斜
視図、第１図（ｃ）は熱収縮性チューブを加熱収縮させ
た状態を示す斜視図、第２図は円筒状磁石の斜視図、第
３図は他の円筒状磁石の斜視図、第４図はヒデオカメラ
の鏡筒部の部分断面図である。
１・・・円筒基体、１ａ・・・外周面、２・・ゴムマグ
ネット素材、２ａ・外周面、３ ・熱収縮性チューブ、
４．５ ・円筒状磁石。
１ａｙＦ周面
（ａ）
ｈメラ企屯笥がの併祝１仔１１凪
第４図FIG. 1 is a perspective view showing the step-by-step manufacturing process of a cylindrical magnet according to an embodiment of the present invention, and FIG. Fig. 1(b) is a perspective view showing a state in which a heat-shrinkable tube is inserted, Fig. 1(c) is a perspective view showing a state in which the heat-shrinkable tube is heated and shrunk, and Fig. 2 shows a cylindrical magnet. FIG. 3 is a perspective view of another cylindrical magnet, and FIG. 4 is a partial sectional view of the lens barrel portion of the video camera. 1... Cylindrical base, 1a... Outer peripheral surface, 2... Rubber magnet material, 2a, outer circumferential surface, 3, heat-shrinkable tube,
4.5 - Cylindrical magnet. 1ayF circumferential surface (a)
Claims (1)
剤で接着し、このゴムマグネット素材の外周面側に熱収
縮性チューブを挿入し、次にこの熱収縮性チューブを加
熱収縮させて前記ゴムマグネット素材に圧接させ、前記
接着剤硬化後ゴムマグネット素材を着磁することを特徴
とする円筒状磁石の製造方法。A thin plate-like rubber magnet material is adhered to the outer peripheral surface of the cylindrical base with adhesive, a heat-shrinkable tube is inserted into the outer peripheral surface of the rubber magnet material, and the heat-shrinkable tube is then heat-shrinked to form the rubber. A method for producing a cylindrical magnet, which comprises bringing the rubber magnet material into pressure contact with a magnet material, and magnetizing the rubber magnet material after the adhesive has hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177411A JPS6335153A (en) | 1986-07-28 | 1986-07-28 | Manufacture of cylindrical magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177411A JPS6335153A (en) | 1986-07-28 | 1986-07-28 | Manufacture of cylindrical magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6335153A true JPS6335153A (en) | 1988-02-15 |
Family
ID=16030455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61177411A Pending JPS6335153A (en) | 1986-07-28 | 1986-07-28 | Manufacture of cylindrical magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6335153A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016537690A (en) * | 2013-11-24 | 2016-12-01 | ライカ カメラ アクチエンゲゼルシャフト | Electric position adjustment drive for lens |
-
1986
- 1986-07-28 JP JP61177411A patent/JPS6335153A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016537690A (en) * | 2013-11-24 | 2016-12-01 | ライカ カメラ アクチエンゲゼルシャフト | Electric position adjustment drive for lens |
| EP3072003B1 (en) * | 2013-11-24 | 2020-12-30 | Leica Camera AG | Motorized adjusting drive for an objective |
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