JP2010208433A - Speaker mounting structure - Google Patents
Speaker mounting structure Download PDFInfo
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- JP2010208433A JP2010208433A JP2009055331A JP2009055331A JP2010208433A JP 2010208433 A JP2010208433 A JP 2010208433A JP 2009055331 A JP2009055331 A JP 2009055331A JP 2009055331 A JP2009055331 A JP 2009055331A JP 2010208433 A JP2010208433 A JP 2010208433A
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本発明は、車両用ドアのインナパネル等に取り付けられるスピーカの取付構造に関する。 The present invention relates to a speaker mounting structure that is mounted on an inner panel or the like of a vehicle door.
一般に、車載のオーディオ等に用いられるスピーカは、フロントドアのインナパネル等に対し、締結等によって取り付けられる。この場合、ドア本体内に収容されるパワーウインドウの昇降装置やラチェット機構等との干渉を回避するため、スピーカの取付位置は、インナパネルの角隅部近傍に設定されることが一般的である。 Generally, a speaker used for in-vehicle audio or the like is attached to an inner panel or the like of a front door by fastening or the like. In this case, in order to avoid interference with a lifting device or a ratchet mechanism for a power window housed in the door body, the speaker mounting position is generally set near the corner of the inner panel. .
その一方で、インナパネルの縁辺部には、ヒンジ等の高剛性部材が配設されるとともに、アウタパネルとの接合面や段部等が形成されるため、角隅部近傍の剛性は他の部位（中央部等）に比べて相対的に高くなる傾向にある。従って、インナパネル上における角隅部近傍の固有振動数は他の部位に比べて高くなり、このような部位にスピーカを配置すると、スピーカから発せられる高周波音が締結部等を通じてインナパネルに伝達される虞がある。そして、特に、スピーカの高出力時において、このような高周波音がインナパネルに伝達されると、アウタパネル側との共振によって音歪み（所謂、ビレ音）等のノイズが発生する虞がある。 On the other hand, a highly rigid member such as a hinge is disposed on the edge of the inner panel, and a joint surface or a stepped portion with the outer panel is formed. It tends to be relatively higher than (central part etc.). Therefore, the natural frequency near the corners on the inner panel is higher than other parts, and if a speaker is placed in such a part, high-frequency sound emitted from the speaker is transmitted to the inner panel through the fastening part or the like. There is a risk. In particular, when such a high-frequency sound is transmitted to the inner panel at the time of high output of the speaker, there is a possibility that noise such as sound distortion (so-called “buzzing sound”) may occur due to resonance with the outer panel side.
これに対処し、例えば、特許文献１には、スピーカのケース（フレーム）外縁部に沿ってインナパネルとの間にゴム等の弾性部材からなるガスケットを挟み込むと共に、弾性体と質量体とを備えた振動吸収器をインナパネルの要所に取り付けた技術が開示されている。 To cope with this, for example, Patent Document 1 includes a gasket made of an elastic member such as rubber along the outer edge of the speaker case (frame) between the inner panel and an elastic body and a mass body. A technique in which a vibration absorber attached to an important point of the inner panel is disclosed.
しかしながら、上述の特許文献１に開示された技術のように、振動吸収器を設けることは、インナパネル等の構造の複雑化や重量増加等を招く虞がある。その一方で、スピーカのケース外縁部に沿ってインナパネルとの間に介装するガスケット等として低弾性のものを採用し、スピーカ側からインナパネル側等への振動の伝達を抑制することで振動吸収器を廃止することも考えられるが、このような場合、締結等によるスピーカの取付剛性を十分に確保することが困難となる虞がある。 However, as in the technique disclosed in Patent Document 1 described above, providing a vibration absorber may lead to a complicated structure such as an inner panel or an increase in weight. On the other hand, a low-elasticity gasket or the like interposed between the speaker case and the inner panel along the outer edge of the speaker case is used to suppress vibration transmission from the speaker side to the inner panel side. Although it is conceivable to eliminate the absorber, in such a case, it may be difficult to sufficiently secure the mounting rigidity of the speaker by fastening or the like.
本発明は上記事情に鑑みてなされたもので、簡単な構成で、高い取付剛性を確保しつつ、高周波音によるノイズの発生を抑制することができるスピーカの取付構造を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a speaker mounting structure capable of suppressing the generation of noise due to high-frequency sound while ensuring high mounting rigidity with a simple configuration. .
本発明は、剛性に勾配を有する車体パネルに対してスピーカを締結固定するスピーカの取付構造であって、相対的に剛性が低い前記車体パネル上の部位に対し、前記スピーカを締結する強締結部と、相対的に剛性が高い前記車体パネル上の部位に対し、弾性体を介在させた状態で、前記スピーカを前記強締結部よりも低い締結力で締結する緩締結部とを備えたことを特徴とする。 The present invention is a speaker mounting structure for fastening and fixing a speaker to a vehicle body panel having a gradient in rigidity, and a strong fastening portion for fastening the speaker to a portion on the vehicle body panel having a relatively low rigidity. And a loose fastening part for fastening the speaker with a fastening force lower than that of the strong fastening part in a state where an elastic body is interposed with respect to a part on the body panel having relatively high rigidity. Features.
本発明のスピーカの取付構造によれば、簡単な構成で、高い取付剛性を確保しつつ、高周波音によるノイズの発生を抑制することができる。 According to the speaker mounting structure of the present invention, it is possible to suppress the generation of noise due to high-frequency sound while ensuring high mounting rigidity with a simple configuration.
以下、図面を参照して本発明の形態を説明する。図面は本発明の一実施形態に係わり、図１はフロントドア及びスピーカの要部を示す分解斜視図、図２はインナパネル上における剛性の解析結果とネジ孔位置との関係についての一例を示す説明図、図３はフロントドアの要部をインナパネル側から示す側面図、図４は図３のIV−IV線に沿う要部断面図、図５はインナパネル上における剛性の解析結果とネジ孔位置との関係についての他の一例を示す説明図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to an embodiment of the present invention, FIG. 1 is an exploded perspective view showing main parts of a front door and a speaker, and FIG. 2 shows an example of a relationship between a result of analysis of rigidity on an inner panel and a screw hole position. FIG. 3 is a side view showing the main part of the front door from the inner panel side, FIG. 4 is a cross-sectional view of the main part along the line IV-IV in FIG. 3, and FIG. It is explanatory drawing which shows another example about the relationship with a hole position.
図１に示す本実施形態の車両用ドア１は、例えば、車体の前席側に開口するドア開口部（図示せず）を開閉するフロントドアであり、このフロントドア１は、車幅方向外側に位置するアウタパネル５と、車幅方向内側に位置する車体パネルとしてのインナパネル６ととを有して要部が構成されている。 A vehicle door 1 according to this embodiment shown in FIG. 1 is, for example, a front door that opens and closes a door opening (not shown) that opens to the front seat side of a vehicle body. The front door 1 is an outer side in the vehicle width direction. The main part is comprised including the outer panel 5 located at the inner side and the inner panel 6 as the vehicle body panel located on the inner side in the vehicle width direction.
アウタパネル５は、例えば、鋼板を用いた板金部材で構成され、その前後縁辺部及び下側縁辺部がインナパネル６との接合部として設定されている。 The outer panel 5 is made of, for example, a sheet metal member using a steel plate, and the front and rear edge portions and the lower edge portion thereof are set as joint portions with the inner panel 6.
インナパネル６は、例えば、鋼板を用いた板金部材で構成され、その前後縁辺部及び下側縁辺部には、アウタパネル５と接合するためのフランジ部６ａが形成されている。また、インナパネル６には、フランジ部６ａの内側で車室側に凹設する凹面部６ｂが形成されている。そして、インナパネル６は、フランジ部６ａを介してアウタパネル５と接合することにより、中空のドア本体２を構成する。 The inner panel 6 is made of, for example, a sheet metal member using a steel plate, and a flange portion 6a for joining to the outer panel 5 is formed on the front and rear edge portions and the lower edge portion. Further, the inner panel 6 is formed with a concave surface portion 6b that is recessed on the vehicle interior side inside the flange portion 6a. And the inner panel 6 comprises the hollow door main body 2 by joining with the outer panel 5 via the flange part 6a.
また、インナパネル６の凹面部６ｂには、パワーウインドウの昇降装置やラチェット機構等（何れも図示せず）をドア本体２内に組み付けるための作業用開口部１０が適所に開口されている。さらに、凹面部６ｂ上の前部下方寄りの角隅部には、例えば、円形のスピーカ取付孔１１が開口されている。 In addition, a work opening 10 for assembling a power window lifting device, a ratchet mechanism or the like (none of which is shown) into the door body 2 is opened at a suitable position on the concave surface portion 6 b of the inner panel 6. Further, for example, a circular speaker mounting hole 11 is opened at a corner of the concave surface portion 6b near the front lower portion.
ここで、例えば、図１，４に示すように、スピーカ取付孔１１内に収容されるスピーカ２０は、金属製のスピーカフレーム２１を有し、このスピーカフレーム２１に、振動板２５、ボイスコイル２６、及びマグネット２７等の各機能部品が保持されて要部が構成されている。また、スピーカフレーム２１の先端部には環状のフランジ部２２が形成されている。このフランジ部２２からは、複数（例えば、３個）の取付片２３（第１〜第３の取付片２３ａ〜２３ｃ）が、外方に指向して等間隔毎に突設され、各取付片２３ａ〜２３ｃにはネジ挿通孔２４ａ〜２４ｃが穿設されている。 Here, for example, as shown in FIGS. 1 and 4, the speaker 20 accommodated in the speaker mounting hole 11 has a metal speaker frame 21, and a diaphragm 25 and a voice coil 26 are provided on the speaker frame 21. Each functional part such as the magnet 27 is held to constitute a main part. An annular flange portion 22 is formed at the tip of the speaker frame 21. A plurality (for example, three) of attachment pieces 23 (first to third attachment pieces 23a to 23c) are provided from the flange portion 22 so as to protrude outward at equal intervals. Screw insertion holes 24a to 24c are formed in 23a to 23c.
一方、インナパネル６の凹面部６ｂにおいて、スピーカ取付孔１１の外周部には、スピーカフレーム２１上の各ネジ挿通孔２４ａ〜２４ｃに対応する複数（例えば、３個）のネジ孔１２（第１〜第３のネジ孔１２ａ〜１２ｃ）が等間隔毎に穿設されている。また、インナパネル６の内面には、各ネジ孔１２ａ〜１２ｃに対応する位置にナット１３が固設されている（図４参照）。 On the other hand, in the concave portion 6 b of the inner panel 6, a plurality of (for example, three) screw holes 12 (first) corresponding to the screw insertion holes 24 a to 24 c on the speaker frame 21 are formed on the outer peripheral portion of the speaker mounting hole 11. To third screw holes 12a to 12c) are formed at equal intervals. A nut 13 is fixed to the inner surface of the inner panel 6 at positions corresponding to the screw holes 12a to 12c (see FIG. 4).
本実施形態において、これらのネジ孔１２ａ〜１２ｃのうち、２個のネジ孔（第１，第２のネジ孔１２ａ，１２ｂ）は、スピーカ取付孔１１を基準として、インナパネル６の中央寄りに偏倚した位置に穿設されている。また、残り１個のネジ孔（第３のネジ孔１２ｃ）は、スピーカ取付孔１１を基準として、インナパネル６の角部寄りに偏倚した位置に穿設されている。 In the present embodiment, of these screw holes 12a to 12c, two screw holes (first and second screw holes 12a and 12b) are closer to the center of the inner panel 6 with the speaker mounting hole 11 as a reference. It is drilled at a biased position. Further, the remaining one screw hole (third screw hole 12 c) is formed at a position biased toward the corner of the inner panel 6 with respect to the speaker mounting hole 11.
ここで、例えば、図２に示すように、スピーカ取付孔１１の近傍において、インナパネル６は、フランジ部６ａの内側に凹面部６ｂを形成する段部６ｃやドア本体２を車体側に連結するヒンジ取付部１９等の影響により、その剛性に勾配を有し、角部に近づくにつれて高剛性となっている。従って、本実施形態のインナパネル６上において、第１，第２のネジ孔１２ａ，１２ｂが穿設される部位は相対的に剛性の低い部位となり、第３のネジ孔１２ｃが穿設される部位は相対的に剛性の高い部位となる。すなわち、本実施形態のインナパネル６は、スピーカ取付孔１１の近傍において、角部に近づくほど高い固有振動数を有しており、第１，第２のネジ孔１２ａ，１２ｂは相対的に固有振動数が低い部位に穿設され、第３のネジ孔１２ｃは相対的に固有振動数が高い部位に穿設されている。換言すれば、第１，第２のネジ孔１２ａ，１２ｂは高周波音が伝達されにくい部位に穿設され、第３のネジ孔１２ｃは高周波音が伝達され易い部位に穿設されている。 Here, for example, as shown in FIG. 2, in the vicinity of the speaker mounting hole 11, the inner panel 6 connects the stepped portion 6 c forming the concave surface portion 6 b inside the flange portion 6 a and the door body 2 to the vehicle body side. Due to the influence of the hinge mounting portion 19 and the like, the rigidity has a gradient, and the rigidity becomes higher as it approaches the corner. Therefore, on the inner panel 6 of the present embodiment, the portion where the first and second screw holes 12a, 12b are drilled is a portion having relatively low rigidity, and the third screw hole 12c is drilled. The part is a part having relatively high rigidity. That is, the inner panel 6 of the present embodiment has a higher natural frequency as it approaches the corner in the vicinity of the speaker mounting hole 11, and the first and second screw holes 12a and 12b are relatively unique. The third screw hole 12c is drilled in a portion having a relatively high natural frequency. In other words, the first and second screw holes 12a and 12b are formed in a portion where high-frequency sound is difficult to be transmitted, and the third screw hole 12c is formed in a portion where high-frequency sound is easily transmitted.
図１，３，４に示すように、このようなインナパネル６に対し、スピーカ取付孔１１には、スピーカ２０の基部側が挿入され、これにより、スピーカ２０の要部がドア本体２内に収容される。また、各ネジ孔１２ａ〜１２ｃには各取付片２３ａ〜２３ｃの各ネジ挿通孔２４ａ〜２４ｃが位置決めされ、これらを貫通するビス１５がナット１３に螺合することにより、スピーカ２０はインナパネル６に締結固定される。 As shown in FIGS. 1, 3, and 4, the base side of the speaker 20 is inserted into the speaker mounting hole 11 with respect to such an inner panel 6, whereby the main part of the speaker 20 is accommodated in the door body 2. Is done. Further, the screw insertion holes 24a to 24c of the mounting pieces 23a to 23c are positioned in the screw holes 12a to 12c, and the screws 15 penetrating through the screws 15 are screwed into the nut 13 so that the speaker 20 is connected to the inner panel 6. Fastened and fixed to.
この場合において、第１，第２の取付片２３ａ，２３ｂは、インナパネル６に対して直接的に当接された状態で締結される。これにより、第１，第２の取付片２３ａ，２３ｂは、インナパネル６に対してスピーカ２０を十分に保持可能な強い締結力で締結される。 In this case, the first and second attachment pieces 23 a and 23 b are fastened in a state of being in direct contact with the inner panel 6. Accordingly, the first and second mounting pieces 23 a and 23 b are fastened with a strong fastening force that can sufficiently hold the speaker 20 with respect to the inner panel 6.
一方、第３のネジ孔１２ｃの周部には凹溝１６が形成され、この凹溝１６には高周波音を好適に吸収可能なゴム等からなる比較的低弾性の弾性体１７が配設されている。そして、第３の取付片２３ｃは、インナパネル６との間に弾性体１７を介在させた状態で締結される。これにより、第３の取付片２３ｃは、インナパネル６側と音（振動）的に遮断された状態で、第１，第２の取付片２３ａ，２３ｂよりも相対的に低い締結力でインナパネル６に締結される。 On the other hand, a concave groove 16 is formed in the peripheral portion of the third screw hole 12c, and a relatively low-elasticity elastic body 17 made of rubber or the like that can suitably absorb high frequency sound is disposed in the concave groove 16. ing. The third mounting piece 23c is fastened with the elastic body 17 interposed between the inner mounting panel 23 and the inner panel 6. As a result, the third mounting piece 23c is sounded (vibrated) from the inner panel 6 side in a sound (vibration) state and has a relatively lower fastening force than the first and second mounting pieces 23a and 23b. 6 is fastened.
このように、本実施形態において、スピーカ２０は、インナパネル６の中央寄りに設定される２つの強締結部と、インナパネル６の角隅部寄りに設定される１つの緩締結部とを介して、インナパネル６に締結固定されている。 Thus, in the present embodiment, the speaker 20 is connected via two strong fastening portions set near the center of the inner panel 6 and one loose fastening portion set near the corners of the inner panel 6. The inner panel 6 is fastened and fixed.
このような実施形態によれば、相対的に剛性が低いインナパネル６上の部位に対し、スピーカ２０の取付片２３ａ，２３ｂを直接的に当接させた状態で強い締結力で締結すると共に、相対的に剛性が高いインナパネル６上の部位に対しては、弾性体１７を局所的に介在させた状態で、スピーカ２０の取付片２３ｃを取付片２３ａ，２３ｂよりも弱い締結力で締結することにより、振動吸収器等を必要としない簡単な構成で、スピーカ２０の高い取付剛性を確保しつつ、高周波音によるノイズの発生を抑制することができる。 According to such an embodiment, while fastening with a strong fastening force in a state where the mounting pieces 23a and 23b of the speaker 20 are in direct contact with a portion on the inner panel 6 having relatively low rigidity, For the part on the inner panel 6 having relatively high rigidity, the mounting piece 23c of the speaker 20 is fastened with a weaker fastening force than the mounting pieces 23a and 23b with the elastic body 17 interposed locally. Accordingly, it is possible to suppress the generation of noise due to high-frequency sound while ensuring high mounting rigidity of the speaker 20 with a simple configuration that does not require a vibration absorber or the like.
すなわち、インナパネル６上の剛性の分布をシミュレーション等によって解析し、高周波音が伝達されにくいインナパネル６上の部位に対しては、強い締結力で取付片２３（取付片２３ａ，２３ｂ）を締結固定してスピーカ２０の取付剛性を確保すると共に、高周波音が伝達されやすいインナパネル６上の部位に対しては、弾性体１７を介在させた状態で、取付片２３（取付片２３ｃ）を締結固定してインナパネル６への高周波音の直接的な伝達を防止することにより、簡単な構成によって高い取付剛性の確保とノイズの抑制とを両立することができる。 That is, the rigidity distribution on the inner panel 6 is analyzed by simulation or the like, and the attachment pieces 23 (attachment pieces 23a and 23b) are fastened to the portion on the inner panel 6 where high-frequency sound is difficult to be transmitted with a strong fastening force. The mounting piece 23 (mounting piece 23c) is fastened to the portion on the inner panel 6 where the high-frequency sound is easily transmitted, with the elastic body 17 interposed, while securing the mounting rigidity of the speaker 20 by fixing. By securing and preventing direct transmission of high frequency sound to the inner panel 6, it is possible to achieve both high mounting rigidity and noise suppression with a simple configuration.
ここで、締結剛性を十分に確保するという観点からは、剛性の低いインナパネル６上の部位に可能な限り多くのネジ孔１２（強締結部）を設定し、締結剛性を確保する上で犠牲となるネジ孔１２（緩締結部）の数を少なくすることが望ましい。例えば、３つの取付片２３（締結部）を介してスピーカ２０を締結固定する場合、弾性体１７を介在させる取付片２３（緩締結部）の数は１つに止めることが望ましい。その一方で、インナパネル６の構造上、スピーカ取付孔１１周囲の広域に亘って剛性が高い部位が分布することがある。このような場合、インナパネル６の剛性分布に対応付けてスピーカ２０側の各取付片２３ａ〜２３ｃの配置を等間隔位置から周方向にシフトさせることにより剛性の低いインナパネル６上の部位に多くのネジ孔１２（強締結部）を設定することも考えられる。しかしながら、このような構成を採用するためには、スピーカフレーム２１を専用品とする必要があり、また、組付剛性のバランス上も好ましくない。そこで、このような場合、例えば、図５に示すように、インナパネル６上に剛性調整用の孔部３０を設け、インナパネル６の機能等を損なわない範囲内において剛性を適宜低剛性側に調整することにより、強締結部に供するネジ孔１２の数を維持しつつ、各ネジ孔１２を等間隔毎に設定することも可能である。 Here, from the viewpoint of sufficiently securing the fastening rigidity, as many screw holes 12 (strong fastening portions) as possible are set in a portion on the inner panel 6 having a low rigidity to sacrifice the securing of the fastening rigidity. It is desirable to reduce the number of screw holes 12 (slow fastening portions). For example, when the speaker 20 is fastened and fixed via three attachment pieces 23 (fastening portions), it is desirable that the number of attachment pieces 23 (slow fastening portions) interposing the elastic body 17 is limited to one. On the other hand, due to the structure of the inner panel 6, a portion having high rigidity may be distributed over a wide area around the speaker mounting hole 11. In such a case, the arrangement of the mounting pieces 23a to 23c on the speaker 20 side is shifted in the circumferential direction in association with the rigidity distribution of the inner panel 6 so as to increase the position on the inner panel 6 having low rigidity. It is also conceivable to set the screw hole 12 (strong fastening portion). However, in order to employ such a configuration, it is necessary to use the speaker frame 21 as a dedicated product, and it is not preferable in terms of the balance of assembly rigidity. Therefore, in such a case, for example, as shown in FIG. 5, a hole 30 for rigidity adjustment is provided on the inner panel 6 so that the rigidity is appropriately lowered within a range that does not impair the function of the inner panel 6 and the like. By adjusting, it is possible to set each screw hole 12 at equal intervals while maintaining the number of screw holes 12 provided for the strong fastening portion.
１ … 車両用ドア（フロントドア）
２ … ドア本体
５ … アウタパネル
６ … インナパネル（車体パネル）
６ａ … フランジ部
６ｂ … 凹面部
６ｃ … 段部
１０ … 作業用開口部
１１ … スピーカ取付孔
１２ … ネジ孔
１２ａ，１２ｂ … ネジ孔（強締結部）
１２ｃ … ネジ孔（緩締結部）
１３ … ナット
１５ … ビス
１６ … 凹溝
１７ … 弾性体
１９ … ヒンジ取付部
２０ … スピーカ
２１ … スピーカフレーム
２２ … フランジ部
２３ … 取付片
２３ａ，２３ｂ … 取付片（強締結部）
２３ｃ … 取付片（緩締結部）
２４ａ，２４ｂ … ネジ挿通孔（強締結部）
２４ｃ … ネジ挿通孔（緩締結部）
２５ … 振動板
２６ … ボイスコイル
２７ … マグネット
３０ … 孔部（剛性調整用の孔部）
1 ... Vehicle door (front door)
2 ... Door body 5 ... Outer panel 6 ... Inner panel (body panel)
6a ... Flange 6b ... Concave 6c ... Step 10 ... Working opening 11 ... Speaker mounting hole 12 ... Screw hole 12a, 12b ... Screw hole (strong fastening part)
12c ... Screw hole (loose fastening part)
DESCRIPTION OF SYMBOLS 13 ... Nut 15 ... Screw 16 ... Groove 17 ... Elastic body 19 ... Hinge attachment part 20 ... Speaker 21 ... Speaker frame 22 ... Flange part 23 ... Attachment piece 23a, 23b ... Attachment piece (strong fastening part)
23c: Mounting piece (loose fastening part)
24a, 24b ... Screw insertion hole (strong fastening part)
24c ... Screw insertion hole (loose fastening part)
25 ... Diaphragm 26 ... Voice coil 27 ... Magnet 30 ... Hole (Rigidity adjustment hole)
Claims (2)
相対的に剛性が低い前記車体パネル上の部位に対し、前記スピーカを締結する強締結部と、
相対的に剛性が高い前記車体パネル上の部位に対し、弾性体を介在させた状態で、前記スピーカを前記強締結部よりも低い締結力で締結する緩締結部とを備えたことを特徴とするスピーカの取付構造。 A speaker mounting structure for fastening and fixing a speaker to a vehicle body panel having a gradient in rigidity,
A strong fastening portion for fastening the speaker to a portion on the vehicle body panel having relatively low rigidity,
A loose fastening portion that fastens the speaker with a fastening force lower than that of the strong fastening portion in a state where an elastic body is interposed with respect to a portion on the vehicle body panel having a relatively high rigidity. Speaker mounting structure.
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|---|---|---|---|
| JP2009055331A JP5256081B2 (en) | 2009-03-09 | 2009-03-09 | Speaker mounting structure |
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| JP2009055331A JP5256081B2 (en) | 2009-03-09 | 2009-03-09 | Speaker mounting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020011721A (en) * | 2014-12-25 | 2020-01-23 | 日本製鉄株式会社 | Panel-shaped molded product |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147979B (en) * | 2017-06-02 | 2019-02-01 | 歌尔股份有限公司 | Loudspeaker mould group |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005020292A (en) * | 2003-06-25 | 2005-01-20 | Pioneer Electronic Corp | On-vehicle speaker device |
| JP2005219515A (en) * | 2004-02-03 | 2005-08-18 | Pioneer Electronic Corp | Insulator for speaker and speaker device |
| JP2005343362A (en) * | 2004-06-04 | 2005-12-15 | Pioneer Electronic Corp | Damping mechanism |
| JP2007106280A (en) * | 2005-10-14 | 2007-04-26 | Mitsubishi Motors Corp | Vehicle door structure |
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2009
- 2009-03-09 JP JP2009055331A patent/JP5256081B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005020292A (en) * | 2003-06-25 | 2005-01-20 | Pioneer Electronic Corp | On-vehicle speaker device |
| JP2005219515A (en) * | 2004-02-03 | 2005-08-18 | Pioneer Electronic Corp | Insulator for speaker and speaker device |
| JP2005343362A (en) * | 2004-06-04 | 2005-12-15 | Pioneer Electronic Corp | Damping mechanism |
| JP2007106280A (en) * | 2005-10-14 | 2007-04-26 | Mitsubishi Motors Corp | Vehicle door structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020011721A (en) * | 2014-12-25 | 2020-01-23 | 日本製鉄株式会社 | Panel-shaped molded product |
| US11000890B2 (en) | 2014-12-25 | 2021-05-11 | Nippon Steel Corporation | Panel-shaped formed product and method for producing panel-shaped formed product |
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| JP5256081B2 (en) | 2013-08-07 |
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