JP3043698U - Integrated composite microphone - Google Patents
Integrated composite microphoneInfo
- Publication number
- JP3043698U JP3043698U JP1997004224U JP422497U JP3043698U JP 3043698 U JP3043698 U JP 3043698U JP 1997004224 U JP1997004224 U JP 1997004224U JP 422497 U JP422497 U JP 422497U JP 3043698 U JP3043698 U JP 3043698U
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- washer
- microphone
- bottom lid
- yoke ring
- 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 - Lifetime
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- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
(57)【要約】
【課題】 雑音や製造コストを低減できる一体複合成型
のマイクロホンを提供する。
【解決手段】 所定方式に組立られる保護キャップ(1
0)、コイル(20)、振動膜(30)、ワシャ(4
0)、磁石(50)、ヨークリング(60)、シート盤
(70)、底蓋(80)およびねじロッド(90)を具
えて、該ワシャ(40)中央部に設けた穿孔に対応して
該磁石(50)中央部にも穿孔を貫設し、該ヨークリン
グ(60)に該ワシャ(40)および該磁石(50)を
収容する通孔(61)を形成して、該シート盤(70)
中央部に該ねじロッド(90)が螺定するねじ孔(7
1)を設けてなるマイクロホンであって、上記底蓋(8
0)を金属材料により鋳造成型した後、所定の上、下モ
ールドを配して該ワシャ(40)、磁石(50)、ヨー
クリング(60)、シート盤(70)、底蓋(80)お
よびロッド(90)を組合わせ、しかる後に樹脂材を射
出して上記各構成部材を一体に鋳ぐるみ成型して構成さ
れる。
(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide an integrated composite microphone capable of reducing noise and manufacturing cost. A protective cap (1) assembled in a predetermined manner
0), coil (20), vibrating membrane (30), washer (4)
0), a magnet (50), a yoke ring (60), a seat plate (70), a bottom lid (80) and a screw rod (90), corresponding to the perforation provided at the center of the washer (40). A perforation is also formed in the central portion of the magnet (50), and a through hole (61) for accommodating the washer (40) and the magnet (50) is formed in the yoke ring (60) to form the seat board ( 70)
A screw hole (7) in which the screw rod (90) is screwed in the central portion.
1) A microphone provided with the above-mentioned bottom lid (8
0) is cast and formed from a metal material, and then a predetermined upper and lower molds are arranged, and the washer (40), the magnet (50), the yoke ring (60), the seat board (70), the bottom lid (80) and The rod (90) is assembled, and then a resin material is injected to integrally form the above-mentioned respective components by cast molding.
Description
【0001】[0001]
本考案はマイクロホンに関し、特に低周波域雑音を低減できる一体複合成型の マイクロホンに関する。 The present invention relates to a microphone, and more particularly, to an integrally composite microphone that can reduce low frequency noise.
【0002】[0002]
従来例のマイクロホンとして、本考案人にかかる台湾新型専利44936号( 広告No.11242)『マイクロホンの一体成型組立構造』があって、第3図 に示す如く、その一体成型のマイクロホン組立構造1は、保護キャップ1a、コ イル1b、振動膜1c、本体1d、ワシャ1e、樹脂リング1f、磁石1g、ヨ ークリング1h、音圧調整部材1i及び温室1jを含み、第4図に示す如く、そ の特徴は、該磁石1gと該ヨークリング1hを所定の内、外位置関係に保持させ るよう、該ワシャ1eを該ヨークリング1h一端に取付け、且つ図示のような位 置決め保持した状態のままに所定のモールドA,Bを使って、本体1d及び樹脂 リング1fを射出成型して一体鋳ぐるみに形成し、更にその上に振動膜1c及び コイル1bを取付けて保護キャップ1aを冠着して構成されるのであり、このよ うな製作方式により自動化生産して生産量を向上させ、並びに工作時間を短縮で きるのであるが、該射出成型の樹脂リング1f及びその周回りに同時に射出成型 される樹脂本体1dは、金属材に比べて密度が比較的低いため、ステージ等で手 荒く扱われてマイクロホンが外部からの振動を受けると、通常、その衝撃は低周 波音域のノイズが該樹脂本体1dを通じてヨークリング1h、樹脂リング1f、 磁石1g、コイル1b、振動膜1cと伝わり、さほど減衰せずに増幅されてスピ ーカより出て来る。 As a conventional microphone, there is Taiwan New Patent No. 44936 (Advertisement No. 11242) “Integrated Microphone Assembly Structure” of the present inventor. As shown in FIG. , A protective cap 1a, a coil 1b, a vibrating membrane 1c, a main body 1d, a washer 1e, a resin ring 1f, a magnet 1g, a yoke ring 1h, a sound pressure adjusting member 1i and a greenhouse 1j, as shown in FIG. The feature is that the washer 1e is attached to one end of the yoke ring 1h so as to hold the magnet 1g and the yoke ring 1h in a predetermined inner / outer positional relationship, and in a state where they are positioned and held as shown in the drawing. Using the prescribed molds A and B, the main body 1d and the resin ring 1f are injection-molded to form an integral cast body, and the vibrating membrane 1c and the coil 1b are further mounted thereon. The protective cap 1a is attached to the crown, and the production method as described above can be automated to improve the production amount and shorten the working time. Since the resin body 1d that is injection-molded around the periphery of the microphone has a relatively low density as compared with a metal material, if the microphone is roughly handled by a stage or the like and the microphone receives vibration from the outside, the shock is usually generated. The noise in the low frequency range is transmitted to the yoke ring 1h, the resin ring 1f, the magnet 1g, the coil 1b, and the vibrating membrane 1c through the resin body 1d, is amplified without being attenuated so much, and comes out from the speaker.
【0003】 上記従来例の第1種の従来のマイクロホンの欠点を解決するため、本考案人に かかる台湾新型専利第96589号(広告No.238818)『マイクロホン の改良構造』は、第5図に示す如く、二次射出成型のマイクロホン2であって、 大方、本体2a、ワシャ2b、外側樹脂リング2c、底蓋2d、コイル2e、振 動膜2f、保護キャップ2g、調音シート2h、室温2i、音圧調整ロッド2j 等により組立られ、その特徴は、第6図に示すように、一般の中実の磁石2a1 とヨークリング2a2を所定位置に位置決めして保持し、該磁石2a1と該ヨー クリング2a2との間に、所定モールド(図示せず)により内側樹脂リング2a 3を射出成型して一体鋳ぐるみの本体2aを形成し、該磁石2a1上端面に高周 波共振パッド2k(第6図に示す如く)を貼着して、その内側樹脂リング2a3 周壁に複数の調音孔2a4を設け、更にもう一つのモールドにより該本体2a及 びワシャ2b周回りに外側樹脂リング2cを射出成型して一体成型の組立構造を 形成し、しかる後にその他部材をそれぞれ順に組合わせて構成されるのであり、 この種の改良マイクロホンは二回射出成型により容易に中実の磁石を得て、部分 品を標準化、統一化に生産できると共に、内側樹脂リング2a3周壁に設けられ た複数の調音孔2a4を通じて、比較的感度が優れた高品質の成品を得られるの であるが、該外側樹脂リング2cと各部材を一体成型した後、その樹脂材の密度 が上記新型専利第44936号と同様に比較的低いために低周波音域の衝撃振動 から守れずに、なおも雑音が高過ぎる嫌いがあってマイクロホンの品質に影響を もたらす欠点がある。In order to solve the drawbacks of the conventional microphone of the first kind of the conventional example described above, a new type patent of Taiwan No. 96589 (Advertisement No. 238818) “Improved structure of microphone” by the present inventor is shown in FIG. As shown, the microphone 2 is a secondary injection-molded microphone, which is generally a main body 2a, washer 2b, outer resin ring 2c, bottom lid 2d, coil 2e, vibrating membrane 2f, protective cap 2g, articulating sheet 2h, room temperature 2i, Assembled by a sound pressure adjusting rod 2j and the like, the feature thereof is that, as shown in FIG. 6, a general solid magnet 2a1 and a yoke ring 2a2 are positioned and held at predetermined positions, and the magnet 2a1 and the york ring are held. The inner resin ring 2a3 is injection-molded between the magnet 2a2 and a predetermined mold (not shown) to form an integrally cast body 2a. A resonance pad 2k (as shown in FIG. 6) is attached, a plurality of tuning holes 2a4 are provided on the inner wall of the inner resin ring 2a3, and another outer mold is formed around the body 2a and washer 2b by another mold. The ring 2c is injection-molded to form an integrally-molded assembly structure, and then the other members are combined in that order. An improved microphone of this type can be easily molded into a solid magnet by double injection molding. As a result, it is possible to standardize and standardize the parts, and to obtain high-quality products with relatively excellent sensitivity through the plurality of tuning holes 2a4 provided on the peripheral wall of the inner resin ring 2a3. After integrally molding the outer resin ring 2c and each member, since the density of the resin material is relatively low as in the above-mentioned new patent No. 44936, it cannot be protected from shock vibration in the low frequency range, There is a drawback to bring an influence on the quality of the microphone there is a dislike main noise is too high.
【0004】[0004]
上記従来のマイクロホンにおける問題点に鑑み、本考案は、雑音や製造コスト を低減できる一体複合成型のマイクロホンを提供することを目的とする。 In view of the problems of the conventional microphones described above, an object of the present invention is to provide an integrated composite microphone that can reduce noise and manufacturing cost.
【0005】[0005]
上記目的を達成するため、本考案は、所定方式に組立られる保護キャップ、コ イル、振動膜、ワシャ、磁石、ヨークリング、シート盤、底蓋およびねじロッド 具えて、該ワシャ中央部に設けた穿孔に対応して該磁石中央部にも穿孔を貫設し 、該ヨークリングに該ワシャおよび該磁石を収容する通孔を形成して、該シート 盤中央部に該ねじロッドが螺定するねじ孔を設けてなるマイクロホンであって、 上記底蓋を金属材料により鋳造成型した後に、所定の上、下モールドを配して 該ワシャ、磁石、ヨークリング、シート盤、底蓋およびねじロッドを組合わせ、 しかる後に樹脂材を射出して上記各構成部材を一体に鋳ぐるみ成型して構成され る。 In order to achieve the above object, the present invention comprises a protective cap, a coil, a vibrating membrane, a washer, a magnet, a yoke ring, a seat plate, a bottom lid and a screw rod which are assembled in a predetermined manner, and which are provided at the center of the washer. Corresponding to the perforation, a perforation is also formed in the central portion of the magnet, a through hole for accommodating the washer and the magnet is formed in the yoke ring, and the screw rod is screwed into the central portion of the seat board. A microphone having holes, wherein the bottom lid is cast and molded from a metal material, and then a predetermined upper and lower molds are arranged to assemble the washer, magnet, yoke ring, seat board, bottom lid and screw rod. After that, the resin material is injected, and the above-mentioned respective components are integrally cast and formed.
【0006】 そして、上記樹脂材を射出成型する際に、上記ワシャを間に置いて上記磁石上 端側に高周波共振パッドを同時に成型すれば一層好ましい。Further, it is more preferable to simultaneously mold the high frequency resonance pad on the upper end side of the magnet with the washer in between when the resin material is injection molded.
【0007】 上記のように構成された本考案は、その底蓋を樹脂材に比べて密度が至って高 い金属材により製作しているので、外部の振動から生じた雑音が金属材の底蓋を へて磁石から振動膜へ伝達された音圧を発生する間に、高密度の底蓋と射出成型 した樹脂材との組合わせにより、該雑音が阻隔されて軽減する。また、その高周 波共振パッドは樹脂材を射出成型する際に同時に一体成型されたので、牢固であ るばかりでなく、剥落や粘着効果喪失などの欠点がなく、更に大事なのは、マイ クロホンにより安定した、より高周波域応答効果が優れた音声を発させることが できる。In the present invention configured as described above, since the bottom lid is made of a metal material having a density extremely higher than that of the resin material, noise generated from external vibration causes the bottom lid of the metal material to be generated. While the sound pressure transmitted from the magnet to the vibrating membrane is generated, the noise is blocked and reduced by the combination of the high-density bottom lid and the injection-molded resin material. In addition, the high-frequency resonance pad was integrally molded at the same time when the resin material was injection-molded, so it was not only solid, but also free from the drawbacks of peeling and loss of the adhesive effect. It is possible to produce a stable and excellent high frequency response effect.
【0008】[0008]
以下、本考案を実施の形態例に基づいて具体的に説明するが、本考案はこの例 のみに限定されない。 Hereinafter, the present invention will be specifically described based on an embodiment, but the present invention is not limited to this example.
【0009】 第1、2図に示す如く、本考案の一体複合成型のマイクロホンにおける比較的 好ましい実施例は、保護キャップ10、コイル20、振動膜30、ワシャ40、 磁石50、ヨークリング60、シート盤70、底蓋80およびねじロッド90を 所定方式に組合せて形成したマイクロホンであって、そのうち、該保護キャップ 10、コイル20および振動膜30は、従来技術と同様な態様に設けられるので 冗舌を省くとして、本実施例の特徴について述べると次の通りである。As shown in FIGS. 1 and 2, a comparatively preferred embodiment of the integrally molded microphone of the present invention is a protective cap 10, a coil 20, a vibrating membrane 30, a washer 40, a magnet 50, a yoke ring 60, a sheet. A microphone formed by combining a board 70, a bottom lid 80, and a screw rod 90 in a predetermined method. Among them, the protective cap 10, the coil 20, and the vibrating membrane 30 are provided in the same manner as in the conventional technique, and therefore, it is not necessary to mention that. For the sake of omission, the features of this embodiment will be described as follows.
【0010】 該底蓋80は、金属材料(例えばアルミ、亜鉛、銅および鉄など)により予め 鋳造成型されて、上記各部材を所定方式により組合せる際に、先ず該ねじロッド 90を該シート盤70中心部のねじ孔71に螺定して、該ヨークリング60を該 シート盤70上端面に積み重ね、次に該磁石50を該ヨークリング60の通孔6 1より装入して、該磁石50を該シート盤70中央部に重ねて該ワシャ40を更 に該磁石50上端面に重畳させ、該底蓋80は該ヨークリング60底面に位置付 けられて、しかる後に所定の上、下モールド(図示せず)を配して樹脂環層10 0を射出成型し、該ワシャ40、磁石50、ヨークリング60、シート盤70、 ねじロッド90および底蓋80を該磁石環層100の射出成型により一体に結合 して、最後に振動膜30、コイル20、保護キャップ10などを組合せて一体複 合成型のマイクロホンに仕上げるのである。The bottom lid 80 is previously cast and formed of a metal material (for example, aluminum, zinc, copper, iron, etc.), and when the above members are assembled in a predetermined manner, first, the screw rod 90 is attached to the seat board. 70. The yoke ring 60 is stacked on the upper end surface of the seat board 70 by screwing it into the screw hole 71 at the center of the 70, and then the magnet 50 is inserted through the through hole 61 of the yoke ring 60. 50 is overlapped with the central portion of the seat board 70, the washer 40 is further overlapped with the upper end surface of the magnet 50, and the bottom lid 80 is positioned on the bottom surface of the yoke ring 60. A resin mold (not shown) is arranged and the resin ring layer 100 is injection molded, and the washer 40, the magnet 50, the yoke ring 60, the seat board 70, the screw rod 90 and the bottom lid 80 are injected into the magnet ring layer 100. It is integrally connected by molding Finally, the diaphragm 30, the coil 20, the protective cap 10 and the like are combined to complete an integrated compound microphone.
【0011】 上記のように構成された本実施例は、そのねじロッド90を調整して、該シー ト盤40に具えた調音孔72(第1、2図参照)との組合わせにより音圧を調整 することができる。In the present embodiment configured as described above, the sound pressure is adjusted by adjusting the screw rod 90 thereof and combining it with the tuning hole 72 (see FIGS. 1 and 2) provided in the sheet board 40. Can be adjusted.
【0012】 また、該樹脂環層100を一体射出成型する際に、同時のそのワシャ40上端 面に高周波共振パッド110を一体成型するのである。Further, when the resin ring layer 100 is integrally injection-molded, the high-frequency resonance pad 110 is integrally molded on the upper end surface of the washer 40 at the same time.
【0013】 したがって、本考案と従来技術の優欠点について分析すると、次の通りである 。Therefore, the advantages and disadvantages of the present invention and the prior art are analyzed as follows.
【0014】 上記従来例の第1種のマイクロホンにおける樹脂リング及び第2種のマイクロ ホンにおける外側樹脂リングは、何れも射出成型用の樹脂材によって形成される ので密度が金属材に比べて低く、それ故、従来例のマイクロホンが外部の振動に よって雑音が生じると、その雑音は樹脂リング若しくは外側樹脂リングを通じて 、その音色を磁石より振動膜に伝導して音圧を発生し、このように、この種マイ クロホンは樹脂低密度材料により低周波反応が強められて、雑音が甚だ高くマイ クロホンの品質に影響をもたらす。また、従来例の第2種のマイクロホンにおけ る高周波共振パッド2kは人手の貼着方式によって固定されるので、操作が不便 、煩雑であるばかりでなく、製造コストが高められると共に、容易に剥落或いは 粘着効果が喪失して、同様にマイクロホンの品質に悪い影響を与える。Since the resin ring in the first type microphone and the outer resin ring in the second type microphone of the above-mentioned conventional example are both formed of a resin material for injection molding, their density is lower than that of a metal material. Therefore, when noise is generated in the conventional microphone due to external vibration, the noise is transmitted through the resin ring or the outer resin ring to the vibrating membrane from the timbre of the noise to generate sound pressure. This type of microphone has a low-frequency response enhanced by the resin low-density material, which is extremely noisy and affects the quality of the microphone. Further, since the high-frequency resonance pad 2k in the second-type microphone of the conventional example is fixed by a manual sticking method, not only is the operation inconvenient and complicated, but also the manufacturing cost is increased and it is easily peeled off. Or the sticking effect is lost, which also adversely affects the quality of the microphone.
【0015】 本考案は、その底蓋80を金属材料によって製作しているので、樹脂材に比べ て密度が至って高く、したがって本考案のマイクロホンが外部の振動から雑音が 生じると、その雑音が金属材質の底蓋80をへて磁石50から振動膜30に伝達 されて音圧を発生し、このように、本考案のマイクロホンが外部の衝撃を受けて 或いは手で握られると、高密度の底蓋80と樹脂環層100との組合わせにより 、該雑音が阻隔されて軽減する。また、その高周波共振パッド110は樹脂環層 100を一体成型する際に同時に成型されので、牢固であるばかりでなく、剥落 や粘着効果喪失などの欠点がないので、製造コストを低減できると共に、最も大 事なことは、マイクロホンにより安定した、より高周波域(3KHZ〜10KHZ )応答 効果が優れた音声を発させることができる。In the present invention, since the bottom cover 80 is made of a metal material, the density is extremely higher than that of the resin material. Therefore, when the microphone of the present invention generates noise due to external vibration, the noise is generated by the metal. When the microphone of the present invention receives an external impact or is gripped by a hand, the high density bottom is generated by transmitting the sound pressure from the magnet 50 to the vibrating membrane 30 through the bottom cover 80 made of a material. The noise is blocked and reduced by the combination of the lid 80 and the resin ring layer 100. Further, since the high-frequency resonance pad 110 is molded at the same time when the resin ring layer 100 is integrally molded, it is not only rigid, but also has no defects such as peeling and loss of the adhesive effect, so that the manufacturing cost can be reduced and What is important is that a microphone can produce stable, high-frequency (3KHZ to 10KHZ) sound with excellent response.
【0016】[0016]
上記のように構成された本考案は、その底蓋を密度が至って高い金属材料によ り製作しているので、外部の振動によって生じた雑音が金属材質の底蓋をへて磁 石から振動膜へと伝達されて音圧を発生する間に、高密度の底蓋及び射出成型し た樹脂材との組合わせにより、該雑音が阻隔されて低減する一方、その高周波共 振パッドを樹脂材を射出成型する際に同時に一体成型したので、牢固であるのみ ならず、剥落や粘着効果喪失などの欠点がないので、製造コストを低減できると 共に、マイクロホンにより安定した、より高周波域応答効果が優れた音声を生じ させることができる。 In the present invention configured as described above, since the bottom lid is made of a metal material having an extremely high density, noise generated by external vibration is transmitted from the magnet through the bottom lid made of metal material. While the sound pressure is transmitted to the membrane and the sound pressure is generated, the noise is blocked and reduced by the combination of the high density bottom lid and the injection-molded resin material. Since it is integrally molded at the same time as the injection molding, it is not only solid, but also has no drawbacks such as peeling or loss of adhesive effect, so it is possible to reduce the manufacturing cost and to have a stable and higher frequency response effect with a microphone. It can produce excellent voice.
【図1】本考案における比較的好ましい実施例の立体分
解図。FIG. 1 is an exploded view of a relatively preferred embodiment of the present invention.
【図2】上記実施例の一体射出成型した後の側視断面
図。FIG. 2 is a cross-sectional side view of the above embodiment after integral injection molding.
【図3】従来例の第1種のマイクロホンの立体分解図。FIG. 3 is a stereoscopic exploded view of a first-type microphone of a conventional example.
【図4】従来例の第1の種のマイクロホンの射出成型後
の側視断面図。FIG. 4 is a cross-sectional side view of a first type microphone of a conventional example after injection molding.
【図5】従来例の第2種のマイクロホンの立体分解図。FIG. 5 is a three-dimensional exploded view of a conventional second type microphone.
【図6】従来例の第2の種のマイクロホンの二次射出成
型後の側視断面図。FIG. 6 is a cross-sectional side view of a conventional second type microphone after secondary injection molding.
10 保護キャップ 20 コイル 30 振動膜 40 ワシャ 50 磁石 60 ヨークリング 61 通孔 70 シート盤 71 ねじ孔 72 調音孔 80 底蓋 90 ねじロッド 100 樹脂環層 110 高周波共振パッド 10 Protective Cap 20 Coil 30 Vibrating Membrane 40 Washer 50 Magnet 60 Yoke Ring 61 Through Hole 70 Sheet Board 71 Screw Hole 72 Tuning Hole 80 Bottom Lid 90 Screw Rod 100 Resin Ring Layer 110 High Frequency Resonance Pad
Claims (2)
ル、振動膜、ワシャ、磁石、ヨークリング、シート盤、
底蓋およびねじロッドを具えて、該ワシャ中央部に設け
た穿孔に対応して該磁石中央部にも穿孔を貫設し、該ヨ
ークリングに該ワシャおよび該磁石を収容する通孔を形
成して、該シート盤中央部に該ねじロッドが螺定するね
じ孔を設けてなるマイクロホンであって、 上記底蓋を金属材料により鋳造成型した後に、所定の
上、下モールドを配して該ワシャ、磁石、ヨークリン
グ、シート盤、底蓋およびねじロッドを組合わせ、しか
る後に樹脂材を射出して上記各構成部材を一体に鋳ぐる
み成型してなる一体複合成型のマイクロホン。1. A protective cap, a coil, a vibrating membrane, a washer, a magnet, a yoke ring, a seat board, which is assembled in a predetermined manner.
A bottom lid and a screw rod are provided, and a hole is formed in the magnet central portion so as to correspond to the hole provided in the washer central portion, and a through hole for accommodating the washer and the magnet is formed in the yoke ring. And a screw hole in which the screw rod is screwed in the central portion of the seat board, wherein the bottom cover is cast and molded from a metal material, and then a predetermined upper and lower molds are arranged to dispose the washer. , A magnet, a yoke ring, a seat plate, a bottom lid, and a screw rod are combined, and then a resin material is injected to integrally mold the above-mentioned respective components into a cast-in-mold microphone.
ャを間に置いて上記磁石上端側に高周波共振パッドを同
時に成型してなる請求項1に記載の一体複合成型のマイ
クロホン。2. The integrated composite molding microphone according to claim 1, wherein when the resin material is injection-molded, the high-frequency resonance pad is simultaneously molded on the upper end side of the magnet with the washer interposed therebetween.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1997004224U JP3043698U (en) | 1997-05-23 | 1997-05-23 | Integrated composite microphone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1997004224U JP3043698U (en) | 1997-05-23 | 1997-05-23 | Integrated composite microphone |
Publications (1)
Publication Number | Publication Date |
---|---|
JP3043698U true JP3043698U (en) | 1997-11-28 |
Family
ID=43178146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1997004224U Expired - Lifetime JP3043698U (en) | 1997-05-23 | 1997-05-23 | Integrated composite microphone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3043698U (en) |
-
1997
- 1997-05-23 JP JP1997004224U patent/JP3043698U/en not_active Expired - Lifetime
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