JPH0238895U - - Google Patents
Info
- Publication number
- JPH0238895U JPH0238895U JP11693488U JP11693488U JPH0238895U JP H0238895 U JPH0238895 U JP H0238895U JP 11693488 U JP11693488 U JP 11693488U JP 11693488 U JP11693488 U JP 11693488U JP H0238895 U JPH0238895 U JP H0238895U
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- pole
- center
- center pole
- magnetic circuit
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
第１図はこの考案の実施例である音響変換器の
磁気回路の半部分を示す断面図、第２図は第１図
の磁気回路における要部を拡大して示す斜視図、
第３図は第１図の磁気回路における交流磁力線を
示す説明図、第４図はこの考案と従来例とを比較
して示す、各周波数における磁気ギヤツプの磁束
密度の変化量ΔＢｇ、マグネツトの磁束密度の変
化量ΔＢｍに着目して解析した結果の特性図、第
５図はこの考案の実施例である音響変換器の磁気
回路の半部分を示す断面図、第６図は第５図の変
形例である音響変換器の磁気回路の半部分を示す
断面図、第７図は第６図の磁気回路における交流
磁力線を示す説明図、、第８図は従来の音響変換
器の磁気回路の半部分を示す断面図、第９図は、
例えば実開昭４７−１２９２３号公報に開示され
た従来の音響変換器の磁気回路の半部分を示す断
面図、第１０図は第５図の磁気回路における交流
磁束の流れを示す説明図、第１１図は第５図の磁
気回路における交流磁力線を示す説明図である。
図において、１…ボトムプレート、２…センタ
ポール、３，９…導電性リング、４…マグネツト
、５…トツププレート、６…ボイスコイル、７…
磁気ギヤツプ、８…ポールピース、８ａ…外周部
、８ｂ…溝部、８ｃ…鉄層、８ｄ…銅層 である
。なお、図中、同一符号は同一、又は相当部分を
示す。
FIG. 1 is a sectional view showing a half part of the magnetic circuit of an acoustic transducer according to an embodiment of this invention, and FIG. 2 is a perspective view showing an enlarged main part of the magnetic circuit of FIG. 1.
FIG. 3 is an explanatory diagram showing alternating current magnetic lines of force in the magnetic circuit of FIG. 1, and FIG. 4 shows a comparison between this invention and a conventional example. A characteristic diagram of the results of analysis focusing on the amount of change in magnetic flux density ΔB m , FIG. 5 is a sectional view showing half of the magnetic circuit of an acoustic transducer that is an embodiment of this invention, and FIG. 7 is an explanatory diagram showing alternating current magnetic lines of force in the magnetic circuit of FIG. 6, and FIG. 8 is a magnetic circuit of a conventional acoustic transducer. FIG. 9 is a sectional view showing a half part of
For example, FIG. 10 is a sectional view showing a half part of the magnetic circuit of a conventional acoustic transducer disclosed in Japanese Utility Model Application Publication No. 47-12923, FIG. FIG. 11 is an explanatory diagram showing AC magnetic lines of force in the magnetic circuit of FIG. 5. In the figure, 1... bottom plate, 2... center pole, 3, 9... conductive ring, 4... magnet, 5... top plate, 6... voice coil, 7...
Magnetic gap, 8...pole piece, 8a...outer periphery, 8b...groove, 8c...iron layer, 8d...copper layer. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
と、上記センタポールの外周部に嵌着された導電
性リングと、上記ボトムプレート上に固定された
マグネツトと、このマグネツト上に固定されると
共に、上記センタポールとの間にボイスコイルが
挿入される磁気ギヤツプを形成するトツププレー
トとを備える磁気回路において、下部に溝部を形
成したポールピースを設け、このポールピースの
外周部と上記溝部に導電性リングをはめ込んだも
のを、上記センタポール上に取り付けて成る構成
としたことを特徴とする音響変換器の磁気回路。 ２ 中央にセンタポールを有するボトムプレート
と、上記センタポールの外周部に嵌着された導電
性リングと、上記ボトムプレート上に固定された
マグネツトと、このマグネツト上に固定されると
共に、上記センタポールとの間にボイスコイルが
挿入される磁気ギヤツプを形成するトツププレー
トとを備える磁気回路において、銅クラツド材か
らなるポールピースを設け、このポールピースを
上記センタポール上に取り付けて成る構成とした
ことを特徴とする音響変換器の磁気回路。[Claims for Utility Model Registration] 1. A bottom plate having a center pole in the center, a conductive ring fitted on the outer periphery of the center pole, a magnet fixed on the bottom plate, and a magnet fixed on the bottom plate. In a magnetic circuit comprising a top plate that is fixed and forms a magnetic gap between which a voice coil is inserted and the center pole, a pole piece with a groove formed in the lower part is provided, and the outer periphery of the pole piece and A magnetic circuit for an acoustic transducer, characterized in that a conductive ring is fitted into the groove and is attached to the center pole. 2. A bottom plate having a center pole in the center, a conductive ring fitted around the outer periphery of the center pole, a magnet fixed on the bottom plate, and a bottom plate fixed on the magnet, and a conductive ring fitted on the outer periphery of the center pole. and a top plate forming a magnetic gap between which a voice coil is inserted, and a pole piece made of copper clad material is provided, and this pole piece is attached to the center pole. A magnetic circuit for an acoustic transducer featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11693488U JPH0238895U (en) | 1988-09-06 | 1988-09-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11693488U JPH0238895U (en) | 1988-09-06 | 1988-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0238895U true JPH0238895U (en) | 1990-03-15 |
Family
ID=31359918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11693488U Pending JPH0238895U (en) | 1988-09-06 | 1988-09-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131617U (en) * | 1991-02-08 | 1992-12-03 | 有限会社創髪 | Wig attachment stopper |
-
1988
- 1988-09-06 JP JP11693488U patent/JPH0238895U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131617U (en) * | 1991-02-08 | 1992-12-03 | 有限会社創髪 | Wig attachment stopper |
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