JP2000088810A - Inductance element with screw core - Google Patents
Inductance element with screw coreInfo
- Publication number
- JP2000088810A JP2000088810A JP10280575A JP28057598A JP2000088810A JP 2000088810 A JP2000088810 A JP 2000088810A JP 10280575 A JP10280575 A JP 10280575A JP 28057598 A JP28057598 A JP 28057598A JP 2000088810 A JP2000088810 A JP 2000088810A
- Authority
- JP
- Japan
- Prior art keywords
- screw core
- screw
- inductance element
- core
- bobbin
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ボビンに螺合する
インダクタンス調整用の螺子コアを備えた螺子コア付き
インダクタンス素子に係り、特にトナーセンサー用差動
トランス等の小型化、薄型化に適した螺子コア付きイン
ダクタンス素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductance element with a screw core having a screw core for adjusting inductance, which is screwed to a bobbin, and is particularly suitable for miniaturization and thinning of a differential transformer for a toner sensor and the like. The present invention relates to an inductance element with a screw core.
【０００２】[0002]
【従来の技術】従来、トナーセンサー用トランス等のイ
ンダクタンス素子として、ボビンの中心部に設けられた
係合筒部にフェライト焼結体の螺子コアを螺合し、イン
ダクタンスの調整を行うものがあった。螺子コア中心は
四角形の角穴が貫通しており、セラミック製の係合棒を
挿入し、ボビンの係合筒部に螺子込んでいた。2. Description of the Related Art Conventionally, as an inductance element such as a transformer for a toner sensor, there is a type in which a screw core of a ferrite sintered body is screwed into an engagement cylinder provided at a center portion of a bobbin to adjust inductance. Was. The center of the screw core was penetrated by a square hole, and a ceramic engaging rod was inserted and screwed into the engaging cylindrical portion of the bobbin.
【０００３】このフェライト焼結体の螺子コアの場合、
挿入時の傾きにより螺子コアの破損を生じ易く、この点
を改善するために、本出願人は実用新案登録第２５４４
９３４号（実開平５−４６００５号）にフェライト粉入
り樹脂材で成形した螺子コアを用いたトナーセンサー用
トランスを提案した。但し、螺子コアは角穴を有するも
のであった。[0003] In the case of a screw core of this ferrite sintered body,
The screw core is liable to be damaged by the inclination at the time of insertion, and in order to improve this point, the present applicant has filed Utility Model Registration No. 2544.
No. 934 (Japanese Utility Model Application Laid-Open No. 5-46005) proposed a transformer for a toner sensor using a screw core formed of a resin material containing ferrite powder. However, the screw core had a square hole.
【０００４】図６及び図７はこの種の螺子コア付きイン
ダクタンス素子の従来例である。これらの図において、
１は鍔付きボビンであり、その一方の鍔部２に端子３が
植設されている。図６では図示を省略したが、図７の如
くボビン１には１個又は複数個の巻線１０が施されてい
る（チョークコイルの場合は１個、トランスの場合は複
数個設けられる。）。ボビン１の中心部の係合筒部４の
内側には軸方向にリブ（突条）５が形成されており、こ
こに螺子コア２０が螺子込まれる。螺子コア２０の外周
面に雄螺子２１が設けてあり、ボビン側係合筒部４に螺
子込むことで、その内周のリブ５に螺子を切って螺合す
る。螺子コア２０の端面には軸方向に貫通する調整用の
角穴２２が形成されており、セラミック等の非磁性材の
回転調整棒の先端角柱部３０と嵌合して回転調整できる
ようになっている。なお、トナーセンサー用の場合、図
７の如く非磁性ケース２５内にボビン部分を収納し、端
子３は装置側回路基板Ｐに接続される。FIGS. 6 and 7 show a conventional example of this kind of inductance element with a screw core. In these figures,
Reference numeral 1 denotes a bobbin with a flange, and a terminal 3 is implanted in one flange 2 of the bobbin. Although not shown in FIG. 6, one or a plurality of windings 10 are provided on the bobbin 1 as shown in FIG. 7 (one is provided for a choke coil, and a plurality is provided for a transformer). . A rib (protrusion) 5 is formed in the center of the bobbin 1 on the inner side of the engagement cylindrical portion 4, and a screw core 20 is screwed into the rib 5. A male screw 21 is provided on the outer peripheral surface of the screw core 20, and is screwed into the bobbin-side engaging cylinder portion 4, so that the screw is cut and screwed into the inner peripheral rib 5. A square hole 22 for adjustment penetrating in the axial direction is formed in the end face of the screw core 20, and can be rotated and adjusted by fitting with the tip prism 30 of a rotation adjusting rod made of a nonmagnetic material such as ceramic. ing. In the case of a toner sensor, the bobbin portion is housed in a non-magnetic case 25 as shown in FIG. 7, and the terminal 3 is connected to the device-side circuit board P.
【０００５】[0005]
【発明が解決しようとする課題】ところで、従来の構造
での螺子コアは、フェライト焼結体の場合は破損しやす
い問題点があり、フェライト粉入り樹脂製の螺子コアは
小型の螺子コアの場合、調整用の穴成形が極めて難し
く、成形歩留まりに問題点があること、成形金型の寿命
等にも問題を生じることが懸念されている。The screw core having the conventional structure has a problem that it is easily broken in the case of a ferrite sintered body, and the screw core made of a resin containing ferrite powder is a small screw core. In addition, there is a concern that it is extremely difficult to form a hole for adjustment, that there is a problem in the molding yield, and that a problem occurs in the life of a molding die and the like.
【０００６】本発明は、上記の点に鑑み、回転抵抗によ
る螺子コアの破壊を防止することが出来るとともに、成
形金型の寿命向上によるコストダウン、さらには小型、
薄型化を図ることのできる螺子コア付きインダクタンス
素子を提供することを目的とする。In view of the above, the present invention can prevent the screw core from being destroyed due to rotational resistance, reduce the cost by increasing the life of the molding die, and further reduce the size.
An object of the present invention is to provide an inductance element with a screw core that can be made thin.
【０００７】さらに、本発明に係る螺子コア付きインダ
クタンス素子をトナーセンサー等に適用することで、該
トナーセンサー等の小型化、ひいては当該トナーセンサ
ー等を用いる機器の小型化が可能となる。Further, by applying the inductance element with a screw core according to the present invention to a toner sensor or the like, it is possible to reduce the size of the toner sensor or the like and further downsize an apparatus using the toner sensor or the like.
【０００８】本発明のその他の目的や新規な特徴は後述
の実施の形態において明らかにする。[0008] Other objects and novel features of the present invention will be clarified in embodiments described later.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明の螺子コア付きインダクタンス素子は、螺子
を外周面に形成した螺子コアを、巻線を設けたボビンの
中心部の係合筒部に螺合した構成において、前記螺子コ
アの端部に角柱状の回転調整のための係合用凸部を一体
に形成したことを特徴としている。In order to achieve the above-mentioned object, the present invention provides an inductance element with a screw core, wherein a screw core having a screw formed on an outer peripheral surface is engaged with a center portion of a bobbin provided with a winding. In a configuration in which the screw core is screwed to the cylindrical portion, a prismatic engagement protrusion for rotation adjustment is integrally formed at an end of the screw core.
【００１０】前記螺子コア付きインダクタンス素子にお
いて、前記螺子コアの外径が２mm以下であってもよい。[0010] In the inductance element with a screw core, an outer diameter of the screw core may be 2 mm or less.
【００１１】また、前記螺子コアはフェライト粉入り樹
脂成形体又はフェライト焼結体で構成できる。Further, the screw core can be formed of a resin molded body containing ferrite powder or a ferrite sintered body.
【００１２】[0012]
【発明の実施の形態】以下、本発明に係る螺子コア付き
インダクタンス素子の実施の形態を図面に従って説明す
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an inductance element with a screw core according to the present invention.
【００１３】図１は実施の形態の分解斜視図、図２及び
図３はインダクタンス調整状態を示す側断面図、図４は
実施の形態で使用する螺子コアの拡大斜視図である。FIG. 1 is an exploded perspective view of the embodiment, FIGS. 2 and 3 are side sectional views showing an inductance adjustment state, and FIG. 4 is an enlarged perspective view of a screw core used in the embodiment.
【００１４】これらの図において、鍔付きボビン１の係
合筒部４に螺合する螺子コア４０は、外周面に雄螺子４
１が設けてあり、ボビン側係合筒部４に螺子込むこと
で、その内周のリブ５に螺子を切って螺合するものであ
り、螺子コア４０の一方の端面には回転調整用の四角柱
状凸部４２が形成されている。螺子コア４０はこれらの
雄螺子４１及び四角柱状凸部４２を有するように、フェ
ライト粉入り樹脂成形体で一体に成形される。前記四角
柱状凸部４２は螺子コア４０の端面を径方向に横断する
細長い形状である。ここで、係合筒部４の内径は２mm以
下、従って螺子コア４０の外径も２mm以下となり、例え
ば係合筒部４の内径が１.５mmのとき螺子コア４０の外
径は１.４〜１.４５mm程度である。In these figures, a screw core 40 screwed to the engagement cylinder 4 of the flanged bobbin 1 has a male screw 4 on its outer peripheral surface.
The screw core 40 is screwed into the bobbin-side engagement cylindrical portion 4 to be screwed and screwed into the rib 5 on the inner periphery thereof, and one end surface of the screw core 40 is used for rotation adjustment. A quadrangular prism-shaped convex portion 42 is formed. The screw core 40 is integrally formed of a resin molded body containing ferrite powder so as to have the male screw 41 and the quadrangular prism-shaped protrusion 42. The quadrangular prism-shaped protrusion 42 has an elongated shape that radially crosses the end face of the screw core 40. Here, the inner diameter of the engagement cylinder 4 is 2 mm or less, and therefore the outer diameter of the screw core 40 is also 2 mm or less. For example, when the inner diameter of the engagement cylinder 4 is 1.5 mm, the outer diameter of the screw core 40 is 1.4. It is about 1.45 mm.
【００１５】なお、その他の構成は前述した図６及び図
７の従来例と同じであり、同一又は相当部分に同一符号
を付して説明を省略する。The other structure is the same as that of the conventional example shown in FIGS. 6 and 7, and the same or corresponding parts are denoted by the same reference characters and description thereof will be omitted.
【００１６】図２及び図３は、フェライト粉入り樹脂成
形体の螺子コア４０に形成された四角柱状凸部４２に、
セラミック等の非磁性材の回転調整棒３１先端のスリッ
ト状凹部３２を嵌合して回転調整する様子を示す。回転
調整棒３１の外径は螺子コア４０の外径よりも小さくし
てある。図２は螺子コア４０の螺子込み量が少なく、イ
ンダクタンスが少ない場合、図３は螺子込み量が多くて
インダクタンスが多い場合であり、回転調整棒３１で螺
子コア４０を順方向又は逆方向に回転させることで、イ
ンダクタンスを増減することが可能である。FIG. 2 and FIG. 3 show square pillar-shaped protrusions 42 formed on the screw core 40 of the resin molded body containing ferrite powder.
A state in which the slit-shaped recess 32 at the tip of the rotation adjusting rod 31 made of a non-magnetic material such as ceramic is fitted to adjust the rotation is shown. The outer diameter of the rotation adjusting rod 31 is smaller than the outer diameter of the screw core 40. FIG. 2 shows the case where the screwing amount of the screw core 40 is small and the inductance is small, and FIG. 3 shows the case where the screwing amount is large and the inductance is large, and the screw core 40 is rotated in the forward or reverse direction by the rotation adjusting rod 31. By doing so, it is possible to increase or decrease the inductance.
【００１７】この第１の実施の形態によれば、次の通り
の効果を得ることができる。According to the first embodiment, the following effects can be obtained.
【００１８】(1) 螺子コア４０をフェライト粉入り樹
脂成形体で形成したため、螺子コア４０の回転抵抗によ
る螺子コア破壊を防止することが出来る。そして、螺子
コアの破壊が防止出来る為、作業性の向上、歩留まりの
向上、特性の安定化が図れる。(1) Since the screw core 40 is formed of a resin molded body containing ferrite powder, breakage of the screw core due to rotational resistance of the screw core 40 can be prevented. Since the breakage of the screw core can be prevented, workability, yield, and characteristics can be improved.
【００１９】(2) 回転調整棒３１と係合してインダク
タンス調整を可能とするために、螺子コア４０に回転調
整用の四角柱状凸部４２を形成しており、従来存在しな
い極小の螺子コアが形成でき、超小型製品の場合でも、
例えば螺子コア４０の外径が２mm以下であっても対応可
能である。その理由は、四角柱状凸部４２をフェライト
粉入り樹脂成形体で成形する場合、成形金型側は四角柱
状凹部となり、金型構成に無理がないためであり、成形
金型の寿命向上によるコストダウンも図ることができ
る。逆に、図６及び図７の従来例の如く、螺子コアに角
穴を形成する場合には、成形金型側に極細のピンを立て
ることになり、超小型製品には対応困難で、金型寿命も
短くなる。(2) In order to engage with the rotation adjusting rod 31 to enable inductance adjustment, the screw core 40 is formed with a square pillar-shaped convex portion 42 for adjusting the rotation. Can be formed, and even in the case of micro products,
For example, even if the outer diameter of the screw core 40 is 2 mm or less, it is possible to cope. The reason for this is that when the square columnar convex portion 42 is formed of a resin molded body containing ferrite powder, the molding die side becomes a rectangular columnar concave portion, and the configuration of the die is not unreasonable. Down can also be planned. Conversely, when a square hole is formed in the screw core as in the conventional example shown in FIGS. 6 and 7, an extremely fine pin is set up on the molding die side, which makes it difficult to handle ultra-small products. Mold life is also shortened.
【００２０】(3) 上記(1),(2)により、螺子コア４０を
螺子込むボビン１も小さくでき、インダクタンス素子と
してのトランスやチョークコイルの小型薄型化を図るこ
とができ（体積比１／４以下にすることができ）、ひい
てはトナーセンサー等の応用機器の小型化薄型化を実現
できる。例えば、従来品では螺子コア外径は３.２mmが
限度であったものを１.４５mmにすることができ、高さ
が２mmの螺子コアで体積比を略１／５にすることが可能
である。また、ボビン外径も従来品では８mmであったも
のが３mmにすることができ、４割以下に縮小できる。(3) Due to the above (1) and (2), the bobbin 1 into which the screw core 40 is screwed can be made smaller, and the transformer and choke coil as the inductance element can be made smaller and thinner (volume ratio 1 / 4 or less), and furthermore, miniaturization and thinning of applied equipment such as a toner sensor can be realized. For example, in the conventional product, the outer diameter of the screw core was limited to 3.2 mm, but it can be reduced to 1.45 mm, and the volume ratio can be reduced to approximately 1/5 with a screw core having a height of 2 mm. is there. Also, the bobbin outer diameter can be reduced to 3 mm from 8 mm in the conventional product, and can be reduced to 40% or less.
【００２１】図５は上記実施の形態において、螺子コア
４０の代わりに使用できる螺子コアの変形例であり、こ
の図における螺子コア４０Ａは平面形状が正方形に近い
四角柱状凸部４２Ａを一端面に有するものである。その
他は前述した図４の螺子コア４０と同様である。FIG. 5 shows a modified example of the screw core that can be used in place of the screw core 40 in the above-described embodiment. The screw core 40A in this figure has a quadrangular prism-shaped convex portion 42A whose planar shape is almost square in one end surface. Have Others are the same as the above-mentioned screw core 40 of FIG.
【００２２】この図５の螺子コア４０Ａの場合、四角柱
状凸部４２Ａに嵌合する角凹部を有する回転調整棒を用
いてインダクタンスを調整を行えばよい。In the case of the screw core 40A shown in FIG. 5, the inductance may be adjusted using a rotation adjusting rod having a square concave portion fitted into the square columnar convex portion 42A.
【００２３】この螺子コア４０Ａの場合も、フェライト
粉入り樹脂成形体で極小寸法のものが得られ、超小型製
品に適用でき、図４の螺子コア４０と同様の効果が得ら
れる。In the case of the screw core 40A as well, a resin molded body containing ferrite powder having a very small size can be obtained, which can be applied to a microminiature product, and the same effect as the screw core 40 of FIG. 4 can be obtained.
【００２４】なお、形状が比較的大きなものであれば、
図４、図５の螺子コアをフェライト焼結体で成形する構
成とすることも可能である。また、四角柱状以外の角柱
状凸部を螺子コアの端面に形成してもよい。但し、調整
時の回転トルクが得易いこと、成形容易性を考慮する
と、三角柱状〜四角柱状、とくに四角柱状凸部が好まし
いといえる。If the shape is relatively large,
4 and 5 may be formed by molding a ferrite sintered body. Further, a prism-shaped protrusion other than the quadrangular prism may be formed on the end surface of the screw core. However, in consideration of the ease of obtaining a rotating torque at the time of adjustment and the ease of molding, it can be said that a triangular prism to a quadrangular prism, in particular, a quadrangular prism convex part is preferable.
【００２５】以上本発明の実施の形態について説明して
きたが、本発明はこれに限定されることなく請求項の記
載の範囲内において各種の変形、変更が可能なことは当
業者には自明であろう。Although the embodiments of the present invention have been described above, it is obvious to those skilled in the art that the present invention is not limited to the embodiments and that various modifications and changes can be made within the scope of the claims. There will be.
【００２６】[0026]
【発明の効果】以上説明したように、本発明に係る螺子
コア付きインダクタンス素子によれば、螺子コアの成形
性を改善して成形金型の寿命向上によるコストダウン、
さらには小型、薄型化を図ることが可能であり、さらに
フェライト粉入り樹脂成形体で成形した場合には、回転
抵抗による螺子コアの破壊を効果的に防止できる。As described above, according to the inductance element with a screw core according to the present invention, the moldability of the screw core is improved, and the cost is reduced by extending the life of the molding die.
Furthermore, it is possible to reduce the size and thickness, and when molded with a resin molded body containing ferrite powder, breakage of the screw core due to rotational resistance can be effectively prevented.
【図１】本発明に係る螺子コア付きインダクタンス素子
の実施の形態を示す分解斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of an inductance element with a screw core according to the present invention.
【図２】実施の形態において螺子コアの螺子込み量が少
ない状態の側断面図である。FIG. 2 is a side sectional view showing a state in which the screw amount of a screw core is small in the embodiment.
【図３】実施の形態において螺子コアの螺子込み量が多
い状態の側断面図である。FIG. 3 is a side sectional view showing a state in which a screw amount of a screw core is large in the embodiment.
【図４】実施の形態で用いた螺子コアの斜視図である。FIG. 4 is a perspective view of a screw core used in the embodiment.
【図５】実施の形態で用いることのできる他の螺子コア
の例を示す斜視図である。FIG. 5 is a perspective view showing an example of another screw core that can be used in the embodiment.
【図６】螺子コア付きインダクタンス素子の従来例を示
す分解斜視図である。FIG. 6 is an exploded perspective view showing a conventional example of an inductance element with a screw core.
【図７】同側断面図である。FIG. 7 is a sectional side view of the same.
１ ボビン ２ 鍔部 ３ 端子 ４ 係合筒部 ５ リブ １０ 巻線 ２０，４０，４０Ａ 螺子コア ２５ 非磁性ケース ３１ 回転調整棒 ２１，４１ 雄螺子 ４２，４２Ａ 四角柱状凸部 DESCRIPTION OF SYMBOLS 1 Bobbin 2 Flange 3 Terminal 4 Engagement cylinder part 5 Rib 10 Winding 20, 40, 40A Screw core 25 Nonmagnetic case 31 Rotation adjusting rod 21, 41 Male screw 42, 42A Square pillar-shaped convex part
Claims (3)
線を設けたボビンの中心部の係合筒部に螺合してなる螺
子コア付きインダクタンス素子において、 前記螺子コアの端部に角柱状の回転調整のための係合用
凸部を一体に形成したことを特徴とする螺子コア付きイ
ンダクタンス素子。1. An inductance element with a screw core, wherein a screw core having a screw formed on an outer peripheral surface thereof is screwed to an engagement cylinder portion at a center portion of a bobbin provided with a winding, wherein an end of the screw core is provided. An inductance element with a screw core, wherein a prismatic engagement protrusion for rotation adjustment is integrally formed.
求項１記載の螺子コア付きインダクタンス素子。2. The inductance element with a screw core according to claim 1, wherein the outer diameter of the screw core is 2 mm or less.
形体又はフェライト焼結体である請求項１又は２記載の
螺子コア付きインダクタンス素子。3. The inductance element with a screw core according to claim 1, wherein the screw core is a resin molded body containing ferrite powder or a ferrite sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10280575A JP2000088810A (en) | 1998-09-16 | 1998-09-16 | Inductance element with screw core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10280575A JP2000088810A (en) | 1998-09-16 | 1998-09-16 | Inductance element with screw core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000088810A true JP2000088810A (en) | 2000-03-31 |
Family
ID=17626953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10280575A Pending JP2000088810A (en) | 1998-09-16 | 1998-09-16 | Inductance element with screw core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000088810A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139498A (en) * | 2005-11-16 | 2007-06-07 | General Environmental Technos Co Ltd | Instrument of measuring specific resistance |
| WO2014038721A1 (en) * | 2012-09-06 | 2014-03-13 | Sumitomo Chemical Company, Limited | Eddy current flaw detection probe and eddy current flaw inspection apparatus |
| JP2019174420A (en) * | 2018-03-29 | 2019-10-10 | アイシン高丘株式会社 | Hardness measurement device |
-
1998
- 1998-09-16 JP JP10280575A patent/JP2000088810A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139498A (en) * | 2005-11-16 | 2007-06-07 | General Environmental Technos Co Ltd | Instrument of measuring specific resistance |
| WO2014038721A1 (en) * | 2012-09-06 | 2014-03-13 | Sumitomo Chemical Company, Limited | Eddy current flaw detection probe and eddy current flaw inspection apparatus |
| JP2014052265A (en) * | 2012-09-06 | 2014-03-20 | Sumitomo Chemical Co Ltd | Eddy current examination probe, and eddy current examination device |
| CN104603612A (en) * | 2012-09-06 | 2015-05-06 | 住友化学株式会社 | Eddy current flaw detection probe and eddy current flaw inspection apparatus |
| US9453818B2 (en) | 2012-09-06 | 2016-09-27 | Sumitomo Chemical Company, Limited | Eddy current flaw detection probe and eddy current flaw inspection apparatus |
| CN104603612B (en) * | 2012-09-06 | 2017-05-03 | 住友化学株式会社 | Eddy current flaw detection probe and eddy current flaw inspection apparatus |
| JP2019174420A (en) * | 2018-03-29 | 2019-10-10 | アイシン高丘株式会社 | Hardness measurement device |
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