JP4881764B2 - Speaker - Google Patents

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JP4881764B2
JP4881764B2 JP2007045832A JP2007045832A JP4881764B2 JP 4881764 B2 JP4881764 B2 JP 4881764B2 JP 2007045832 A JP2007045832 A JP 2007045832A JP 2007045832 A JP2007045832 A JP 2007045832A JP 4881764 B2 JP4881764 B2 JP 4881764B2
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diaphragm
inner peripheral
bobbin
damper
speaker
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JP2008211486A (en
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新 多田
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Alpine Electronics Inc
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Alpine Electronics Inc
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Description

本発明は、ボビンに接着されてボイスコイルに駆動される振動板が合成樹脂材やアルミダイカスト等からなるスピーカに係り、特に、高出力の低音域用として好適なスピーカに関するものである。   The present invention relates to a speaker in which a diaphragm that is bonded to a bobbin and is driven by a voice coil is made of a synthetic resin material, aluminum die cast, or the like, and more particularly to a speaker that is suitable for a high-output low-frequency range.

スピーカの振動板は中央部に円形の開口を有しており、この開口内にボイスコイルが巻装された円筒状のボビンを配置させて、振動板の内周縁部をボビンの外周面に接着固定している。また、振動板の外周縁部は、磁気回路に一体化されたフレームにエッジ部材を介して支持されている。このような振動板の材料としては、従来より、軽量で加工しやすいコーン紙等が多用されている（例えば、特許文献１参照）。   The diaphragm of the speaker has a circular opening in the center, and a cylindrical bobbin around which a voice coil is wound is placed in this opening, and the inner peripheral edge of the diaphragm is bonded to the outer peripheral surface of the bobbin. It is fixed. The outer peripheral edge of the diaphragm is supported by a frame integrated with a magnetic circuit via an edge member. As a material of such a diaphragm, conventionally, cone paper or the like that is light and easy to process has been frequently used (for example, see Patent Document 1).

しかしながら、高出力の低音域用スピーカ等においては、振動板に十分な機械的強度と相応の重量が要求されるため、コーン紙等からなる振動板は必ずしも好適とは言えない。そこで、このようなスピーカの場合、合成樹脂材からなる比較的重い振動板が用いられることがある。かかる合成樹脂製の振動板は、熱可塑性樹脂等を射出成形することによって所望形状に作製することが可能である。
特開２００３−１１６１９７号公報 However, in a high-output low-frequency speaker or the like, a diaphragm made of cone paper or the like is not necessarily suitable because the diaphragm is required to have sufficient mechanical strength and a corresponding weight. Therefore, in the case of such a speaker, a relatively heavy diaphragm made of a synthetic resin material may be used. Such a diaphragm made of synthetic resin can be produced in a desired shape by injection molding a thermoplastic resin or the like.
JP 2003-116197 A

前述したように振動板を合成樹脂製とすることで重量を増したり機械的強度を高めることができるため、高出力の低音域用スピーカに好適な振動板を作製することは可能であるが、このように重い振動板が大きな振幅で振動すると、振動板の内周縁部をボビンの外周面に固定している接着部分に応力が集中して剥離事故が起こりやすくなるという問題があった。すなわち、一般的に振動板は、その内周縁部のうちボビンに隣接する幅狭な環状部分だけが該ボビンに接着固定されているため、重い振動板が大振幅で振動して接着部分に大きな剪断応力が作用すると、振動板の内周縁部がボビンから剥離しやすくなって信頼性が著しく損なわれる。   As described above, since the diaphragm can be made of synthetic resin, the weight can be increased and the mechanical strength can be increased, so that it is possible to produce a diaphragm suitable for a high-output low-frequency speaker, When such a heavy diaphragm vibrates with a large amplitude, there is a problem in that stress concentrates on an adhesive portion where the inner peripheral edge of the diaphragm is fixed to the outer peripheral surface of the bobbin, and a peeling accident easily occurs. That is, in general, only the narrow annular portion adjacent to the bobbin is bonded and fixed to the bobbin in the inner peripheral edge of the diaphragm, so that the heavy diaphragm vibrates with a large amplitude and becomes large on the bonded portion. When the shear stress acts, the inner peripheral edge of the diaphragm is easily peeled off from the bobbin, and the reliability is significantly impaired.

本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、高出力の低音域用として好適な振動板がボビンから剥離する虞のない信頼性の高いスピーカを提供することにある。   The present invention has been made in view of the situation of the prior art as described above, and an object of the present invention is to provide a highly reliable speaker in which a diaphragm suitable for a high-output low-frequency range does not peel from the bobbin. There is.

本発明は、合成樹脂材やアルミダイカスト等からなる振動板の板厚が内周側で大きくなるように成形すると共に、振動板の内周縁部を軸線方向の厚みが最大の環状肉厚部となした。そして、この環状肉厚部の内周面をボビンの外周面に接着すると共に、環状肉厚部の底面の少なくとも一部を、これに対向するダンパの内周縁部に沿う切欠き部を形成して該ダンパに接着するようにした。 The present invention is formed so that the thickness of the diaphragm made of a synthetic resin material, aluminum die casting or the like is increased on the inner peripheral side, and the inner peripheral edge of the diaphragm is formed with an annular thick portion having the maximum axial thickness. I did it. Then, the inner peripheral surface of the annular thick portion is bonded to the outer peripheral surface of the bobbin, and at least a part of the bottom surface of the annular thick portion is formed with a notch along the inner peripheral edge of the damper facing this. It was made to adhere to the damper.

本発明のスピーカによれば、振動板の内周縁部が軸線方向の厚みを最大とする環状肉厚部となっており、この環状肉厚部の内周面と底面がそれぞれボビンとダンパに接着されているため、ボビンに対する振動板の接着面積の増大によって接着強度を高めることができると共に、振動板がダンパを介してもボビンに固定されることになる。それゆえ、高出力の低音域用として好適な重さと重量配分を有する振動板がボビンから剥離しにくくなり、スピーカの信頼性が大幅に高まる。また、接着剤の液ダレを防止する接着剤溜りが内周縁部に形成されているダンパに対しても、振動板を確実に接着させることができる。 According to the speaker of the present invention, the inner peripheral edge portion of the diaphragm is an annular thick portion that maximizes the axial thickness, and the inner peripheral surface and the bottom surface of the annular thick portion are bonded to the bobbin and the damper, respectively. Therefore, the adhesive strength can be increased by increasing the adhesion area of the diaphragm to the bobbin, and the diaphragm is fixed to the bobbin even through the damper. Therefore, a diaphragm having a weight and weight distribution suitable for a high-output low-frequency range becomes difficult to peel from the bobbin, and the reliability of the speaker is greatly increased. In addition, the diaphragm can be reliably bonded to a damper in which an adhesive reservoir for preventing dripping of the adhesive is formed at the inner peripheral edge.

本発明は、ボイスコイルが巻装されたボビンをダンパに弾性支持させると共に、このボビンに振動板の内周縁部を接着固定し、前記ボイスコイルへの通電時に前記振動板が駆動されるようにしたスピーカにおいて、前記振動板は、その内周側の板厚が外周側の板厚よりも大きく、かつ内周縁部は軸線方向の厚みが最大の環状肉厚部となっており、この環状肉厚部の内周面を前記ボビンの外周面に接着すると共に、前記ダンパの内周縁部に、前記ボビンに隣接する凹溝状の接着剤溜りと、この接着剤溜りの径方向外側に連続する環状凸部とが形成されており、前記環状肉厚部の底面のうち前記環状凸部と対向して接着される部分に切欠き部を形成して該環状凸部に沿って湾曲させ、前記ダンパに接着するという構成にした。 In the present invention, the bobbin around which the voice coil is wound is elastically supported by the damper, and the inner peripheral edge of the diaphragm is bonded and fixed to the bobbin so that the diaphragm is driven when the voice coil is energized. In the above-described speaker, the diaphragm has an annular thick portion having an inner peripheral plate thickness larger than an outer peripheral plate thickness and an inner peripheral portion having a maximum axial thickness. The inner peripheral surface of the thick portion is bonded to the outer peripheral surface of the bobbin, and the concave groove-shaped adhesive reservoir adjacent to the bobbin and the radially outer side of the adhesive reservoir are connected to the inner peripheral portion of the damper. An annular convex portion is formed, a notch is formed in a portion of the bottom surface of the annular thick portion that is bonded to face the annular convex portion, and the curved portion is curved along the annular convex portion, It was configured to adhere to the damper.

このように構成されたスピーカの振動板は、内周側を外周側よりも厚く形成することにより高出力の低音域用として好適な重さと重量配分に設定でき、振動時に懸念されるローリングも抑制できる。また、かかる振動板は内周縁部が環状肉厚部となっており、この環状肉厚部の内周面がボビンの外周面に接着されているため、ボビンに対する振動板の接着面積が増大して接着強度が高まる。また、環状肉厚部の底面のうち環状凸部と対向して接着される部分に切欠き部を形成して該環状凸部に沿って湾曲させ、該ダンパに接着されているため、ダンパに対する振動板の接着強度も確保しやすく、このダンパを介して振動板がボビンに固定できるようになる。 The loudspeaker diaphragm configured in this way can be set to a suitable weight and weight distribution for the high output low sound range by forming the inner peripheral side thicker than the outer peripheral side, and also suppresses rolling that is a concern during vibration. it can. In addition, since the inner peripheral edge of the diaphragm is an annular thick part, and the inner peripheral surface of the annular thick part is bonded to the outer peripheral surface of the bobbin, the bonding area of the diaphragm to the bobbin increases. This increases the adhesive strength. In addition, a notch is formed in a portion of the bottom surface of the annular thick portion that is bonded to the annular convex portion so as to be bent along the annular convex portion, and is adhered to the damper. It is easy to secure the adhesive strength of the diaphragm, and the diaphragm can be fixed to the bobbin via this damper.

また、ダンパの内周縁部に、ボビンに隣接する凹溝状の接着剤溜りと、この接着剤溜りの径方向外側に連続する環状凸部とが形成されており、振動板の環状肉厚部の底面のうち前記環状凸部と対向して接着される部分に切欠き部を形成して該環状凸部に沿って湾曲させると、接着剤の液ダレを防止する接着剤溜りが内周縁部に形成されているダンパに対しても、振動板を確実に接着させることができる。 Further, a concave groove-like adhesive reservoir adjacent to the bobbin and an annular convex portion that is continuous radially outward of the adhesive reservoir are formed on the inner peripheral edge of the damper, and the annular thick portion of the diaphragm An adhesive reservoir for preventing dripping of the adhesive is formed by forming a notch in a portion of the bottom surface of the base plate that is bonded to face the annular convex portion and curving along the annular convex portion. The diaphragm can be securely bonded to the damper formed on the plate.

また、上記の構成において、振動板の板厚が外周側から内周側へ向かって漸増していると、振動板を合成樹脂材の射出成形により容易に作製できる。   In the above configuration, when the thickness of the diaphragm gradually increases from the outer peripheral side toward the inner peripheral side, the diaphragm can be easily manufactured by injection molding of a synthetic resin material.

実施例について図面を参照して説明すると、図１は本発明の第１実施例に係るスピーカの断面図、図２は図１の要部拡大図である。   An embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a speaker according to a first embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of FIG.

図１に示すスピーカ１は、高出力の低音域用として設計されたものである。このスピーカ１は、磁気ギャップＧを有する磁気回路２と、ボビン３に巻装されて磁気ギャップＧ内に配置されたボイスコイル４と、ラッパ状に成形されて内周縁部がボビン３の外周面に接着固定された合成樹脂製の振動板５と、断面形状が波形に形成されて内周縁部がボビン３の外周面に接着固定された円盤状のダンパ６と、磁気回路２に一体化されて振動板５およびダンパ６の外周縁部を支持しているフレーム７と、振動板５に取着されてボビン３を蓋閉している防塵キャップ８とによって主に構成されている。ただし、振動板５の外周縁部はウレタンやラバー材等の変形容易部材であるエッジ部材９を介してフレーム７に支持されており、この振動板５の内周縁部とボイスコイル４を巻装したボビン３とがダンパ６によって弾性支持されている。また、磁気回路２は、センターポール１０ａを有する下部ヨーク１０と、センターポール１０ａを囲繞して下部ヨーク１０上に固定されたリング状のマグネット１１と、マグネット１１上に固定された環形板状の上部ヨーク１２とで構成されており、センターポール１０ａの外周面と上部ヨーク１２の内周面との間に磁気ギャップＧが形成されている。   A speaker 1 shown in FIG. 1 is designed for a high output low sound range. The speaker 1 includes a magnetic circuit 2 having a magnetic gap G, a voice coil 4 wound around the bobbin 3 and disposed in the magnetic gap G, and a trumpet-shaped inner peripheral portion of the outer peripheral surface of the bobbin 3. The diaphragm 5 made of synthetic resin and bonded to the disk, the disk-shaped damper 6 whose cross-sectional shape is corrugated and whose inner peripheral edge is bonded and fixed to the outer peripheral surface of the bobbin 3, and the magnetic circuit 2 are integrated. The frame 7 that supports the outer peripheral edge of the diaphragm 5 and the damper 6 and the dustproof cap 8 that is attached to the diaphragm 5 and closes the bobbin 3 are mainly configured. However, the outer peripheral edge portion of the diaphragm 5 is supported by the frame 7 via an edge member 9 which is an easily deformable member such as urethane or rubber, and the inner peripheral edge portion of the diaphragm 5 and the voice coil 4 are wound. The bobbin 3 is elastically supported by the damper 6. The magnetic circuit 2 includes a lower yoke 10 having a center pole 10 a, a ring-shaped magnet 11 that surrounds the center pole 10 a and is fixed on the lower yoke 10, and an annular plate shape that is fixed on the magnet 11. The upper yoke 12 is configured, and a magnetic gap G is formed between the outer peripheral surface of the center pole 10 a and the inner peripheral surface of the upper yoke 12.

振動板５は熱可塑性樹脂を射出成形することによって作製されたものである。この振動板５の板厚は外周側から内周側へ向かって漸増しており、内周縁部は軸線方向の厚みが最大の環状肉厚部５ａとなっている。図２に詳細に示すように、環状肉厚部５ａは内周面５ｂがボビン３の外周面に接着固定されていると共に、底面５ｃの一部（切欠き部５ｄ）がダンパ６の内周縁部に接着固定されている。ダンパ６の内周縁部には、ボビン３に隣接する凹溝状の接着剤溜り６ａと、接着剤溜り６ａの径方向外側に連続する環状凸部６ｂとが形成されており、環状肉厚部５ａの底面５ｃは切欠き部５ｄがダンパ６の環状凸部６ｂと対向して接着されている。この切欠き部５ｄは環状肉厚部５ａの底面５ｃの全周に亘って形成されており、図２に示すように切欠き部５ｄの形状は環状凸部６ｂに沿って凹状に湾曲させてあるので、ダンパ６に対する環状肉厚部５ａの接着面積は広くて十分な接着強度が得られる。なお、ダンパ６の接着剤溜り６ａは接着剤の液だれを防止するためのものである。また、図２中の符号１３は接着層を示している。   The diaphragm 5 is produced by injection molding a thermoplastic resin. The plate thickness of the diaphragm 5 gradually increases from the outer peripheral side toward the inner peripheral side, and the inner peripheral edge portion is an annular thick portion 5a having the maximum axial thickness. As shown in detail in FIG. 2, the annular thick portion 5 a has the inner peripheral surface 5 b bonded and fixed to the outer peripheral surface of the bobbin 3, and a part of the bottom surface 5 c (notch portion 5 d) is the inner peripheral edge of the damper 6. It is fixed to the part. A concave groove-like adhesive reservoir 6a adjacent to the bobbin 3 and an annular convex portion 6b continuous to the radially outer side of the adhesive reservoir 6a are formed on the inner peripheral edge of the damper 6, and the annular thick portion The bottom surface 5 c of 5 a is bonded so that the notch 5 d faces the annular convex portion 6 b of the damper 6. The notch portion 5d is formed over the entire circumference of the bottom surface 5c of the annular thick portion 5a. As shown in FIG. 2, the shape of the notch portion 5d is curved in a concave shape along the annular convex portion 6b. Therefore, the bonding area of the annular thick portion 5a with respect to the damper 6 is wide and sufficient bonding strength can be obtained. The adhesive reservoir 6a of the damper 6 is for preventing dripping of the adhesive. Moreover, the code | symbol 13 in FIG. 2 has shown the contact bonding layer.

このように構成されたスピーカ１は、ボイスコイル４へ音声電流が通電されると、ボビン３と一体的に振動板５が駆動されるため、振動板５の前面の空気が振動して音声電流に対応した音が放出されるようになっている。   In the speaker 1 configured in this manner, when a voice current is supplied to the voice coil 4, the diaphragm 5 is driven integrally with the bobbin 3. Sound corresponding to is released.

上記の如く第１実施例に係るスピーカ１は合成樹脂製の振動板５を使用しており、この振動板５は内周側の板厚が外周側の板厚よりも大きくしてあるため、高出力の低音域用として好適な重さに設定できる。また、駆動源であるボビン３に近い振動板５の内周側が重くしてあることから、振動時に懸念されるローリングも抑制できる。しかも、この振動板５は、外周側から内周側へ向かって板厚が漸増する形状に形成されているため、ゲートを介して内側からの射出成形による作製が容易である。   As described above, the speaker 1 according to the first embodiment uses the diaphragm 5 made of synthetic resin, and the diaphragm 5 has a plate thickness on the inner peripheral side larger than a plate thickness on the outer peripheral side. It can be set to a weight suitable for high output low sound range. Moreover, since the inner peripheral side of the diaphragm 5 close to the bobbin 3 as a driving source is heavy, rolling that is a concern during vibration can be suppressed. Moreover, since the diaphragm 5 is formed in a shape in which the plate thickness gradually increases from the outer peripheral side toward the inner peripheral side, it can be easily manufactured by injection molding from the inside through the gate.

また、第１実施例に係るスピーカ１では、振動板５の内周縁部が環状肉厚部５ａとなっており、この環状肉厚部５ａの内周面５ｂがボビン３の外周面に接着されているため、ボビン３に対する振動板５の接着面積が広くて接着強度が高まっている。さらに、環状肉厚部５ａの底面５ｃの一部（切欠き部５ｄ）が、ダンパ６の内周縁部の環状凸部６ｂに沿う形状に形成されて該環状凸部６ｂに接着されているため、ダンパ６に対する振動板５の接着強度も確保しやすい。つまり、振動板５は、環状肉厚部５ａの内周面５ｂがボビン３に直接固定されているだけでなく、ダンパ６を介してもボビン３に固定されている。それゆえ、高出力の低音域用として好適な重さを有する振動板５が大きな振幅で振動しても、振動板５の内周縁部（環状肉厚部５ａ）がボビン３から剥離する虞がなくなり、スピーカの信頼性が大幅に高まっている。   In the speaker 1 according to the first embodiment, the inner peripheral edge of the diaphragm 5 is an annular thick part 5a, and the inner peripheral surface 5b of the annular thick part 5a is bonded to the outer peripheral surface of the bobbin 3. Therefore, the bonding area of the diaphragm 5 with respect to the bobbin 3 is wide and the bonding strength is increased. Furthermore, a part of the bottom surface 5c (the notch portion 5d) of the annular thick portion 5a is formed in a shape along the annular convex portion 6b of the inner peripheral edge portion of the damper 6 and bonded to the annular convex portion 6b. In addition, it is easy to ensure the adhesive strength of the diaphragm 5 to the damper 6. That is, the diaphragm 5 is not only directly fixed to the bobbin 3 by the inner peripheral surface 5 b of the annular thick part 5 a but also to the bobbin 3 through the damper 6. Therefore, there is a possibility that the inner peripheral edge (annular thick portion 5a) of the diaphragm 5 may be peeled off from the bobbin 3 even when the diaphragm 5 having a weight suitable for a high output low frequency range vibrates with a large amplitude. The reliability of the speaker is greatly increased.

図３は本発明の第２実施例に係るスピーカの要部拡大図であり、図２と対応する部分には同一符号が付してあるため、重複する説明は省略する。   FIG. 3 is an enlarged view of an essential part of the speaker according to the second embodiment of the present invention, and the same reference numerals are given to portions corresponding to those in FIG.

図３に示すスピーカ２０は、振動板５の内周縁部に相当する環状肉厚部５ａの底面形状とダンパ６の内周縁部の形状が、前述した第１実施例と異なっている。すなわち、第２実施例に係るスピーカ２０において、振動板５の環状肉厚部５ａの底面５ｃは、そのほぼ全面がこの底面５ｃに対向するダンパ６の内周縁部に沿う湾曲形状に形成されて該ダンパ６に接着されている。そのため、この第２実施例では、ダンパ６に対する振動板５の接着強度が第１実施例よりも高まっている。   The speaker 20 shown in FIG. 3 differs from the first embodiment described above in the shape of the bottom surface of the annular thick portion 5a corresponding to the inner peripheral edge of the diaphragm 5 and the shape of the inner peripheral edge of the damper 6. That is, in the speaker 20 according to the second embodiment, the bottom surface 5c of the annular thick portion 5a of the diaphragm 5 is formed in a curved shape along the inner peripheral edge of the damper 6 that is substantially entirely opposed to the bottom surface 5c. The damper 6 is adhered. Therefore, in the second embodiment, the adhesive strength of the diaphragm 5 to the damper 6 is higher than that in the first embodiment.

図４は本発明の第３実施例に係るスピーカの要部拡大図であり、図２および図３と対応する部分には同一符号が付してあるため、重複する説明は省略する。   FIG. 4 is an enlarged view of a main part of the speaker according to the third embodiment of the present invention, and the same reference numerals are given to portions corresponding to those in FIGS.

図４に示すスピーカ３０では、ダンパ６の内周縁部に、ボビン３に隣接する環状平坦部６ｃと、この環状平坦部６ｃの径方向外側に連続する環状凸部６ｂとが形成されており、振動板５の環状肉厚部５ａの底面５ｃは、これら環状平坦部６ｃおよび環状凸部６ｂに沿う形状に形成されている。つまり、環状肉厚部５ａの底面５ｃは、環状平坦部６ｃに沿う環状平坦面５ｅと、環状凸部６ｂに沿う凹状に湾曲した切欠き部５ｄとからなり、この底面５ｃのほぼ全面がダンパ６の内周縁部（環状平坦部６ｃおよび環状凸部６ｂ）に接着されている。そのため、この第３実施例も、前述した第２実施例と同様に、ダンパ６に対する振動板５の接着強度が第１実施例よりも高まっている。   In the speaker 30 shown in FIG. 4, an annular flat portion 6 c adjacent to the bobbin 3 and an annular convex portion 6 b continuous to the radially outer side of the annular flat portion 6 c are formed on the inner peripheral edge of the damper 6. The bottom surface 5c of the annular thick portion 5a of the diaphragm 5 is formed in a shape along the annular flat portion 6c and the annular convex portion 6b. That is, the bottom surface 5c of the annular thick portion 5a is composed of an annular flat surface 5e along the annular flat portion 6c and a notched portion 5d curved in a concave shape along the annular convex portion 6b. 6 is bonded to the inner peripheral edge portion (annular flat portion 6c and annular convex portion 6b). Therefore, also in the third embodiment, the adhesive strength of the diaphragm 5 to the damper 6 is higher than that in the first embodiment, as in the second embodiment described above.

図５は本発明の第４実施例に係るスピーカの断面図、図６は図５の要部拡大図であり、図１〜図４と対応する部分には同一符号が付してあるため、重複する説明は省略する。   5 is a cross-sectional view of a speaker according to a fourth embodiment of the present invention, FIG. 6 is an enlarged view of the main part of FIG. 5, and the same reference numerals are given to the parts corresponding to FIGS. A duplicate description is omitted.

図５，６に示すスピーカ４０は、内周縁部がボビン３およびダンパ６に接着される振動板５の前面に第２の振動板１５を取着して２枚構造の振動板にしてあるため、前記防塵キャップが省略されている。この第４実施例において、スピーカ４０の振動板５は、その外径が前述した第１乃至第３実施例のものよりも小さくてエッジ部材９まで到達していないが、この振動板５の内周縁部（環状肉厚部５ａ）の形状やダンパ６の内周縁部（接着剤溜り６ａおよび環状凸部６ｂ）の形状は第１実施例と同様である。また、第２の振動板１５の外周縁部は、エッジ部材９を介してフレーム７に支持されている。   The speaker 40 shown in FIGS. 5 and 6 has a two-plate structure by attaching a second diaphragm 15 to the front surface of the diaphragm 5 whose inner peripheral edge is bonded to the bobbin 3 and the damper 6. The dust cap is omitted. In the fourth embodiment, the diaphragm 5 of the speaker 40 has an outer diameter smaller than that of the first to third embodiments described above and does not reach the edge member 9. The shape of the peripheral portion (annular thick portion 5a) and the shape of the inner peripheral portion (adhesive reservoir 6a and annular convex portion 6b) of the damper 6 are the same as in the first embodiment. Further, the outer peripheral edge of the second diaphragm 15 is supported by the frame 7 via the edge member 9.

なお、上記した各実施例では、振動板５を熱可塑性樹脂の射出成形によって作製した場合について説明したが、硬質ゴムやアルミダイカスト等の合成樹脂以外の材料を用いて振動板５を作製することも可能である。   In each of the above-described embodiments, the case where the diaphragm 5 is produced by injection molding of a thermoplastic resin has been described. However, the diaphragm 5 is produced using a material other than a synthetic resin such as hard rubber or aluminum die casting. Is also possible.

本発明の第１実施例に係るスピーカの断面図である。It is sectional drawing of the speaker which concerns on 1st Example of this invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明の第２実施例に係るスピーカの要部拡大図である。It is a principal part enlarged view of the speaker which concerns on 2nd Example of this invention. 本発明の第３実施例に係るスピーカの要部拡大図である。It is a principal part enlarged view of the speaker which concerns on 3rd Example of this invention. 本発明の第４実施例に係るスピーカの断面図である。It is sectional drawing of the speaker which concerns on 4th Example of this invention. 図５の要部拡大図である。It is a principal part enlarged view of FIG.

符号の説明Explanation of symbols

１，２０，３０，４０ スピーカ
２ 磁気回路
３ ボビン
４ ボイスコイル
５ 振動板
５ａ 環状肉厚部
５ｂ 内周面
５ｃ 底面
５ｄ 切欠き部
５ｅ 環状平坦面
６ ダンパ
６ａ 接着剤溜り
６ｂ 環状凸部
６ｃ 環状平坦部
７ フレーム
１５ 第２振動板 1, 20, 30, 40 Speaker 2 Magnetic circuit 3 Bobbin 4 Voice coil 5 Diaphragm 5a Annular thick part 5b Inner peripheral surface 5c Bottom 5d Notch part 5e Annular flat surface 6 Damper 6a Adhesive reservoir 6b Annular convex part 6c Annular Flat part 7 Frame 15 Second diaphragm

Claims (2)

ボイスコイルが巻装されたボビンをダンパに弾性支持させると共に、このボビンに振動板の内周縁部を接着固定し、前記ボイスコイルへの通電時に前記振動板が駆動されるようにしたスピーカにおいて、
前記振動板は、その内周側の板厚が外周側の板厚よりも大きく、かつ内周縁部は軸線方向の厚みが最大の環状肉厚部となっており、この環状肉厚部の内周面を前記ボビンの外周面に接着すると共に、前記ダンパの内周縁部に、前記ボビンに隣接する凹溝状の接着剤溜りと、この接着剤溜りの径方向外側に連続する環状凸部とが形成されており、前記環状肉厚部の底面のうち前記環状凸部と対向して接着される部分に切欠き部を形成して該環状凸部に沿って湾曲させ、前記ダンパに接着したことを特徴とするスピーカ。 In a speaker in which a bobbin around which a voice coil is wound is elastically supported by a damper, and the inner peripheral edge of a diaphragm is bonded and fixed to the bobbin so that the diaphragm is driven when the voice coil is energized.
The diaphragm has an annular thick part having an inner peripheral side larger than an outer peripheral part, and an inner peripheral part having a maximum axial thickness. While adhering a peripheral surface to the outer peripheral surface of the bobbin, a groove-shaped adhesive reservoir adjacent to the bobbin on an inner peripheral edge of the damper, and an annular convex continuous to the radially outer side of the adhesive reservoir, Formed on the bottom surface of the annular thick portion and bonded to the damper by forming a notch in a portion bonded to the annular convex portion so as to be curved along the annular convex portion . A speaker characterized by that. 請求項１の記載において、前記振動板の板厚が外周側から内周側へ向かって漸増していることを特徴とするスピーカ。 The speaker according to claim 1 , wherein the thickness of the diaphragm gradually increases from the outer peripheral side toward the inner peripheral side.
JP2007045832A 2007-02-26 2007-02-26 Speaker Expired - Fee Related JP4881764B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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JPS6055197A (en) * 1983-09-06 1985-03-30 立川ブラインド工業株式会社 Double glass unit having blind mounted therein
JPS63159992A (en) * 1986-12-24 1988-07-02 Toshiba Corp Read/write device for portable medium
JPH0334397A (en) * 1990-05-23 1991-02-14 Hitachi Ltd Equipment component mounting structure
JPH09149493A (en) * 1995-11-27 1997-06-06 Onkyo Corp Cone-shaped speaker
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JP2004364058A (en) * 2003-06-05 2004-12-24 Sony Corp Speaker
JP4137869B2 (en) * 2004-10-25 2008-08-20 パイオニア株式会社 Speaker device and manufacturing method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111770419A (en) * 2020-06-17 2020-10-13 斯贝克电子（嘉善）有限公司 Loudspeaker with sound basin positioning device and manufacturing method thereof

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