JP7775697B2 - Sound emitting devices and electronic musical instruments - Google Patents
Sound emitting devices and electronic musical instrumentsInfo
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Description
本発明は、放音装置及び電子楽器に関する。 The present invention relates to a sound emitting device and an electronic musical instrument.
従来、電子ピアノやキーボード等の電子楽器では、音声を出力する放音装置が設けられる。一般に、この種の放音装置では、鍵盤を保持する筐体の上面や背面に放音部（スピーカー）が配置される（例えば、特許文献１、２参照）。 Conventionally, electronic musical instruments such as electronic pianos and keyboards are equipped with sound-emitting devices that output sound. Generally, in this type of sound-emitting device, a sound-emitting unit (speaker) is located on the top or back of the housing that holds the keyboard (see, for example, Patent Documents 1 and 2).
しかしながら、放音部を単純に筐体の上面や背面に配置した場合、筐体の強度や音の広がりなどの点で課題がある。
本発明は、上記事情に鑑みてなされたものであり、放音部を好適に配置することを目的とする。
However, simply placing the sound emitting section on the top or back surface of the housing poses problems in terms of the strength of the housing and the spread of sound.
The present invention has been made in view of the above circumstances, and has as its object to provide a suitable arrangement of a sound emitting section.
前記目的を達成するために、本発明に係る放音装置は、
第１方向に長尺な直方体状に形成されたケース部材であって、内部空間を前記第１方向に仕切るリブを有し、前記直方体の頂点に接する３面に隣接して面取りされた面取り面を有するケース部材と、
前記ケース部材の下面を閉塞させる蓋部材と、
前記面取り面に配置された放音部と、
前記第１方向に延在し、前記第１方向の両側が、前記リブに仕切られた前記ケース部材の２つの前記内部空間と個別に連通するダクト部材と、を備え、
前記蓋部材のうち前記第１方向の中央部に孔部が形成され、
前記ダクト部材のうち前記第１方向の中央部が前記孔部を通じて外部と連通し、
前記ケース部材は、前記第１方向の両側に２つの前記面取り面を有し、当該２つの面取り面に夫々配置された２つの前記放音部を保持し、
共通する前記ダクト部材と前記孔部とによって、前記２つの放音部に対応する２つのバスレフ構造が形成される、ことを特徴とする。
In order to achieve the above object, the sound emitting device according to the present invention comprises:
a case member formed in a rectangular parallelepiped shape that is elongated in a first direction, the case member having ribs that divide an internal space in the first direction, and having chamfered surfaces that are chamfered adjacent to three faces that contact vertices of the rectangular parallelepiped;
a cover member that closes the lower surface of the case member;
a sound emitting portion disposed on the chamfered surface;
a duct member extending in the first direction, the duct member having both sides in the first direction individually communicating with the two internal spaces of the case member partitioned by the rib,
a hole is formed in the center of the cover member in the first direction;
a central portion of the duct member in the first direction communicates with the outside through the hole;
the case member has two chamfered surfaces on both sides in the first direction, and holds two of the sound emitting units arranged on the two chamfered surfaces, respectively;
The common duct member and the hole form two bass reflex structures corresponding to the two sound emitting sections.
本発明によれば、放音部を好適に配置することができる。 This invention allows the sound emitting section to be positioned optimally.
図１から図６を参照しつつ、本発明に係る放音装置及び電子楽器の実施形態について説明する。
なお、以下に述べる実施形態には、本発明を実施するために技術的に好ましい種々の限定が付されているが、本発明の範囲を以下の実施形態及び図示例に限定するものではない。
1 to 6, an embodiment of a sound emitting device and an electronic musical instrument according to the present invention will be described.
It should be noted that the embodiments described below are subject to various limitations that are technically preferable for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.
図１は、本実施形態に係る電子楽器１の斜視図である。
なお、以下の説明において、前後左右上下の各方向は、各図に示した向きをいうものとする。
図１に示すように、本実施形態に係る電子楽器１は、複数の鍵２１を備える鍵盤２が、左右に長尺な楽器ケース３に保持されたキーボードである。楽器ケース３の左右両側には、放音ユニット４がそれぞれ設けられている。
FIG. 1 is a perspective view of an electronic musical instrument 1 according to this embodiment.
In the following description, the front, back, left, right, top and bottom directions refer to the directions shown in the drawings.
1, the electronic musical instrument 1 according to this embodiment is a keyboard in which a keyboard 2 having a plurality of keys 21 is held in a long instrument case 3. Sound output units 4 are provided on both the left and right sides of the instrument case 3.
図２は、図１のうち放音ユニット４周辺の拡大図であり、図３は、放音ユニット４の放音ケース４１のうちスピーカー４２が配置される面取り面４１１の変形例を示す図である。また、図４は、放音ユニット４の分解斜視図であり、図５は、放音ユニット４の縦断面図である。
なお、電子楽器１の左右両側に設けられた２つの放音ユニット４は、互いに左右対称に構成されるため、以下では、２つの放音ユニット４のうち電子楽器１の右側に設けられたものについて説明し、電子楽器１の左側に設けられたものについての説明を省略する。
Fig. 2 is an enlarged view of the periphery of the sound emitting unit 4 in Fig. 1, and Fig. 3 is a diagram showing a modified example of a chamfered surface 411 on which the speaker 42 is disposed of the sound emitting case 41 of the sound emitting unit 4. Fig. 4 is an exploded perspective view of the sound emitting unit 4, and Fig. 5 is a vertical cross-sectional view of the sound emitting unit 4.
Since the two sound-emitting units 4 provided on the left and right sides of the electronic musical instrument 1 are configured symmetrically with respect to each other, the following will only describe the one provided on the right side of the electronic musical instrument 1, and will omit a description of the one provided on the left side of the electronic musical instrument 1.
図２に示すように、放音ユニット４は、本発明に係る放音装置の一例であり、放音ケース４１と、２つのスピーカー（放音部）４２と、ダクト部材４３及びケース底板４４（図４，５参照）とを備えている。 As shown in Figure 2, the sound output unit 4 is an example of a sound output device according to the present invention, and includes a sound output case 41, two speakers (sound output units) 42, a duct member 43, and a case bottom plate 44 (see Figures 4 and 5).
放音ケース４１は、２つのスピーカー４２を支持する放音ユニット４のエンクロージャである。放音ケース４１は、前後に長尺であり、上面が前下がりに緩やかに傾斜し、下面が開口した略直方体箱状に形成されている。 The sound output case 41 is an enclosure for the sound output unit 4 that supports two speakers 42. The sound output case 41 is long from front to back, has a gently sloping top surface toward the front, and is shaped like a roughly rectangular box with an open bottom.
放音ケース４１は、それぞれにスピーカー４２が配置される２つの面取り面４１１（前側面取り面４１１ａ、後側面取り面４１１ｂ）を有している。各面取り面４１１には、スピーカー４２が取り付けられる開口部４１２と、２つの貫通孔４１３とが形成されている。
２つの面取り面４１１のうち、放音ケース４１の前側に設けられた前側面取り面４１１ａは、放音ケース４１の前側の角（頂点）を削るように形成され、放音ケース４１の上下両面及び左右両面と接する四辺を少なくとも有する略四角形状に形成されている。この前側面取り面４１１ａは、平面視で前方斜め右側（左右外側）、側面視で前方やや斜め下側を向いている。
一方、放音ケース４１の後側に設けられた後側面取り面４１１ｂは、放音ケース４１の後方右側の角（頂点）を削るように形成され、放音ケース４１の上面、右面及び後面（背面）と接する３辺を少なくとも有する略三角形状に形成されている。この後側面取り面４１１ｂは、平面視で後方斜め右側（左右外側）、側面視で後方斜め上側を向いている。
The sound emitting case 41 has two chamfered surfaces 411 (a front chamfered surface 411a and a rear chamfered surface 411b) on which the speakers 42 are respectively disposed. Each chamfered surface 411 has an opening 412 to which the speaker 42 is attached, and two through holes 413 formed therein.
Of the two chamfered surfaces 411, the front chamfered surface 411a provided on the front side of the sound emitting case 41 is formed so as to cut away the front corners (vertices) of the sound emitting case 41, and is formed in a substantially rectangular shape having at least four sides that contact both the top and bottom and the left and right sides of the sound emitting case 41. This front chamfered surface 411a faces diagonally forward and to the right (outside the left and right) in a plan view, and faces diagonally forward and slightly downward in a side view.
On the other hand, the rear chamfered surface 411b provided on the rear side of the sound emitting case 41 is formed by cutting away the corner (vertex) on the rear right side of the sound emitting case 41, and is formed in a substantially triangular shape having at least three sides that contact the top surface, right surface, and rear surface (back surface) of the sound emitting case 41. This rear chamfered surface 411b faces diagonally rearward and rightward (outward from the left and right) in a plan view, and faces diagonally rearward and upward in a side view.
なお、面取り面４１１は、上記形状に限定されず、直方体（放音ケース４１）の頂点に接する３面に隣接して面取りされたものであればよい。
例えば図３（ａ）に示すように、面取り面４１１は、放音ケース４１（直方体）の頂点Ｐを削ってこれに接する３面と隣接する三角形状であってもよいし、図３（ｂ）に示すような四角形状であってもよい。
このような面取り面４１１を設けることにより、放音ケース４１の角部に稜線を形成して強度（剛性）を向上させ、かつ軽量化を図ることができる。
The chamfered surfaces 411 are not limited to the above shape, and may be chamfered adjacent to the three surfaces that contact the vertices of the rectangular parallelepiped (sound emitting case 41).
For example, as shown in FIG. 3( a), the chamfered surface 411 may be a triangle formed by cutting away the vertex P of the sound emitting case 41 (rectangular parallelepiped) and adjacent to the three faces that are in contact with it, or may be a square shape as shown in FIG. 3( b).
By providing such chamfered surfaces 411, ridges can be formed at the corners of the sound emitting case 41, improving the strength (rigidity) and reducing the weight.
また、放音ケース４１は、図４及び図５に示すように、その内部空間Ｓを前後に仕切るリブ４１４を有している。リブ４１４は、放音ケース４１の内部空間Ｓの容積を略均等に前後に二分するように、当該内部空間Ｓの略前後中央に立設されている。このリブ４１４により、放音ケース４１の内部空間Ｓは、前側面取り面４１１ａに配置されるスピーカー４２が収容される前側空間Ｓ１と、後側面取り面４１１ｂに配置されるスピーカー４２が収容される後側空間Ｓ２とに仕切られている。 As shown in Figures 4 and 5, the sound emitting case 41 also has a rib 414 that divides its internal space S into front and rear spaces. The rib 414 is erected approximately in the center of the front and rear of the internal space S of the sound emitting case 41 so as to divide the volume of the internal space S of the sound emitting case 41 approximately equally into front and rear halves. This rib 414 divides the internal space S of the sound emitting case 41 into a front space S1 that houses the speakers 42 arranged on the front chamfered surface 411a, and a rear space S2 that houses the speakers 42 arranged on the rear chamfered surface 411b.
スピーカー４２は、フレーム４２１に保持されたコーン４２２やコイル（図示省略）等を有しており、電子楽器１の制御部（図示省略）からの音声出力信号に基づいて音声を出力する。スピーカー４２は、コーン４２２を開口部４１２から露出させるようにして、放音ケース４１の内側から各面取り面４１１に配置される。
スピーカー４２のフレーム４２１には、ねじ穴を有する２つの固定部４２１ａが突設されている。２つの固定部４２１ａは、各面取り面４１１に設けられた２つの貫通孔４１３に対応しており、２つの貫通孔４１３に挿通させた固定ねじ（図示省略）を２つの固定部４２１ａに締結することにより、スピーカー４２が放音ケース４１に固定される。
The speaker 42 has a cone 422, a coil (not shown), etc. held by a frame 421, and outputs sound based on an audio output signal from a control unit (not shown) of the electronic musical instrument 1. The speaker 42 is disposed on each of the chamfered surfaces 411 from the inside of the sound emitting case 41 so that the cone 422 is exposed from the opening 412.
Two fixing portions 421a each having a screw hole are protruded from the frame 421 of the speaker 42. The two fixing portions 421a correspond to two through holes 413 provided in each chamfered surface 411, and the speaker 42 is fixed to the sound emitting case 41 by fastening fixing screws (not shown) inserted through the two through holes 413 to the two fixing portions 421a.
ダクト部材４３は、ケース底板４４との間に、外部に連通する所定長さのダクト（通風管Ｔ）を形成するためのものである。具体的に、ダクト部材４３は、前後に長尺に形成されるとともにその全長に亘って左右両側壁を有し、下方に開口する凹状に形成されている。ダクト部材４３の前後両端面も開口しており、前側開口部４３ａ及び後側開口部４３ｂとなっている。また、ダクト部材４３の下面の略前後中央には、側壁と略同じ高さの仕切り板４３１が立設されている。
ダクト部材４３は、放音ケース４１のリブ４１４に上面を当接させる（もしくは近接させる）ようにして、放音ケース４１の内部空間Ｓ内の下部に配置される。
The duct member 43 is for forming a duct (ventilation pipe T) of a predetermined length that communicates with the outside between itself and the case bottom plate 44. Specifically, the duct member 43 is formed long in the front-to-rear direction, has left and right side walls along its entire length, and is formed in a concave shape that opens downward. Both front and rear end surfaces of the duct member 43 are also open, forming a front opening 43a and a rear opening 43b. In addition, a partition plate 431 is erected at approximately the center of the front-to-rear direction on the underside of the duct member 43, at approximately the same height as the side walls.
The duct member 43 is disposed at the bottom of the internal space S of the sound emitting case 41 so that the upper surface thereof abuts against (or is close to) the rib 414 of the sound emitting case 41 .
ケース底板４４は、楽器ケース３の下面開口を閉塞させる蓋部材である。ケース底板４４の前後方向の略中央には、孔部４４１が形成されている。孔部４４１は、ケース底板４４が放音ケース４１に取り付けられたときに、ダクト部材４３の仕切り板４３１を前後に跨ぐように配置される。 The case bottom plate 44 is a lid member that closes the bottom opening of the musical instrument case 3. A hole 441 is formed in approximately the center of the case bottom plate 44 in the front-to-rear direction. The hole 441 is positioned so as to straddle the partition plate 431 of the duct member 43 from front to back when the case bottom plate 44 is attached to the sound emitting case 41.
以上の構成を具備する放音ユニット４では、図５に示すように、放音ケース４１の内部空間Ｓが、前側面取り面４１１ａに配置される前側のスピーカー４２が収容される前側空間Ｓ１と、後側面取り面４１１ｂに配置される後側のスピーカー４２が収容される後側空間Ｓ２とに仕切られている。これら前側空間Ｓ１と後側空間Ｓ２とは、互いの体積（容積）が略同一となるようリブ４１４に仕切られている。そのため、前側のスピーカー４２と後側のスピーカー４２とで、エンクロージャの体積が関わるスピーカー性能（例えばバスレフ等）が略等しくなっている。 In the sound output unit 4 having the above configuration, as shown in FIG. 5, the internal space S of the sound output case 41 is divided into a front space S1 that houses the front speaker 42 arranged on the front chamfered surface 411a, and a rear space S2 that houses the rear speaker 42 arranged on the rear chamfered surface 411b. The front space S1 and rear space S2 are divided by the rib 414 so that their volumes are approximately the same. As a result, the speaker performance (e.g., bass reflex) related to the enclosure volume is approximately the same between the front speaker 42 and the rear speaker 42.
また、放音ユニット４では、ケース底板４４がダクト部材４３の下面開口を閉塞することで、これらの間に２つの連通管Ｔが形成される。２つの連通管Ｔのうち、前側開口部４３ａから孔部４４１までの前側の連通管Ｔが、前側空間Ｓ１と外部とを連通させ、後側開口部４３ｂから孔部４４１までの後側の連通管Ｔが、後側空間Ｓ２と外部とを連通させる。
このように、放音ユニット４の２つのスピーカー４２は、連通管（ダクト）Ｔと孔部（ポート）４４１とを含むバスレフ構造を、一部の構成を共通させつつ個別に有している。これにより、簡便な構成で、各スピーカー４２から出力される低音域を増強することができ、比較的に小型のスピーカー４２であっても広音域の出力が可能となっている。
In the sound output unit 4, the case bottom plate 44 closes the lower opening of the duct member 43, thereby forming two communication pipes T therebetween. Of the two communication pipes T, the front communication pipe T from the front opening 43 a to the hole 441 connects the front space S1 to the outside, and the rear communication pipe T from the rear opening 43 b to the hole 441 connects the rear space S2 to the outside.
In this way, the two speakers 42 of the sound output unit 4 each have a bass reflex structure including the communication pipe (duct) T and the hole (port) 441, while sharing some of the same configuration. This makes it possible to enhance the low-frequency range output from each speaker 42 with a simple configuration, and even relatively small speakers 42 can output a wide range of sounds.
以上のように、本実施形態によれば、略直方体の放音ケース４１の頂点Ｐに接する３面に隣接して面取りされた面取り面４１１に、スピーカー４２が配置されている。
これにより、放音ケース４１の角部に稜線を形成して強度を向上させ、かつ軽量化を図りつつ、当該稜線を含む面取り面４１１にスピーカー４２を配置することができる。したがって、従来に比べて、好適にスピーカー４２を配置することができる。
As described above, according to this embodiment, the speaker 42 is disposed on the chamfered surfaces 411 that are chamfered adjacent to the three surfaces that contact the vertex P of the sound emitting case 41 that is substantially rectangular parallelepiped.
This allows for ridges to be formed at the corners of the sound emitting case 41, improving strength and reducing weight, while also allowing the speaker 42 to be placed on the chamfered surface 411 that includes the ridges. This allows for a more suitable placement of the speaker 42 than in the past.
また、本実施形態によれば、ダクト部材４３は、前後方向の両側が放音ケース４１の前側空間Ｓ１及び後側空間Ｓ２と個別に連通しており、このダクト部材４３内の前後方向中央部がケース底板４４の孔部４４１を通じて外部と連通している。
これにより、連通管（ダクト）Ｔと孔部（ポート）４４１とを含むバスレフ構造を、放音ユニット４の２つのスピーカー４２に対して一部の構成を共通させつつ個別に設けることができる。したがって、簡便な構成として部品点数の削減や組立の簡素化を図りつつ、各スピーカー４２から出力される低音域を増強することができる。
ただし、２つのスピーカー４２に対応させて設ける２つのバスレフ構造は、少なくとも一部の構成が共通するものであればよく、上記構成に限定されない。
Furthermore, according to this embodiment, both sides of the duct member 43 in the front-to-rear direction are individually connected to the front space S1 and rear space S2 of the sound emitting case 41, and the central part of the duct member 43 in the front-to-rear direction is connected to the outside through the hole 441 in the case bottom plate 44.
This allows the bass reflex structure including the communication pipe (duct) T and the hole (port) 441 to be individually provided for the two speakers 42 of the sound output unit 4 while sharing some of the configuration. Therefore, the bass range output from each speaker 42 can be enhanced while achieving a simple configuration that reduces the number of parts and simplifies assembly.
However, the two bass reflex structures provided in correspondence with the two speakers 42 are not limited to the above configuration as long as they have at least a part of the configuration in common.
なお、本発明を適用可能な実施形態は、上述した実施形態に限定されず、本発明の要旨を逸脱しない範囲で種々変形が可能であることは言うまでもない。 It goes without saying that the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.
例えば、上記実施形態では、スピーカー４２の２つの固定部４２１ａを面取り面４１１の２つの貫通孔４１３に固定することとした。しかし、例えば図３（ａ）に示すように、面取り面４１１にその複数（図３（ａ）では３つ）の頂点に対応した複数の貫通孔４１３を設け、これに対応したスピーカー４２の複数の固定部４２１ａを当該複数の貫通孔４１３に固定してもよい。これにより、面取り面４１１の頂点付近の狭いスペースを有効に利用しつつ、スピーカー４２を面取り面４１１に配置（固定）することができる。 For example, in the above embodiment, the two fixing portions 421a of the speaker 42 are fixed to the two through holes 413 of the chamfered surface 411. However, as shown in FIG. 3(a), for example, multiple through holes 413 may be provided in the chamfered surface 411 corresponding to its multiple vertices (three in FIG. 3(a)), and the corresponding multiple fixing portions 421a of the speaker 42 may be fixed to the multiple through holes 413. This makes it possible to effectively utilize the narrow space near the vertices of the chamfered surface 411 while positioning (fixing) the speaker 42 on the chamfered surface 411.
また、スピーカー４２が配置される面取り面４１１の向きは、少なくとも放音ユニット４の２つのものが互いに異なる方向を向いていれば、特に限定されない。放音ユニット４の前後で異なる方向に音を出すことにより、周囲空間への音の広がり効果が期待できる。
ただし、図６（ａ）に示す（面取り面４１１（スピーカー４２）の向きを太矢印で示す）ように、電子楽器１に対し、左右両側４つの面取り面４１１が平面視で略放射状方向を向くのがより好ましい。これにより、360度音場再生を実現し、周囲の聴衆に対して満遍なく音声を出力できる。
また、図６（ｂ）に示すように、放音ユニット４のうち後側の面取り面４１１ｂを前側の面取り面４１１ａよりも上側に向けてもよい。これにより、例えば電子楽器１が背面を壁に近づけて設置される場合等に、壁での反射を含めた音の広がり効果を期待できる。
また、前側の面取り面４１１ａをより前側（あるいはさらに電子楽器１の左右中央側）に向けてもよい。これにより、前側の面取り面４１１ａのスピーカー４２をより演奏者向きに配置でき、演奏者がより臨場感を得ることができる。
Furthermore, the orientation of the chamfered surface 411 on which the speakers 42 are arranged is not particularly limited as long as at least the two sound emitting units 4 face in different directions. By emitting sound in different directions from the front and rear of the sound emitting units 4, it is possible to expect the effect of spreading the sound into the surrounding space.
However, as shown in Figure 6(a) (the orientation of the chamfered surfaces 411 (speakers 42) is indicated by thick arrows), it is more preferable that the four chamfered surfaces 411 on both the left and right sides of the electronic musical instrument 1 face in a generally radial direction in a plan view. This allows for 360-degree sound field reproduction, and enables sound to be output evenly to the surrounding audience.
6(b), the rear chamfered surface 411b of the sound-emitting unit 4 may be oriented higher than the front chamfered surface 411a. This allows for a greater sound dispersion effect, including sound reflections from the wall, when the electronic musical instrument 1 is placed with its back surface close to a wall, for example.
Also, the front chamfered surface 411a may be oriented further forward (or further toward the center of the electronic musical instrument 1), thereby enabling the speaker 42 on the front chamfered surface 411a to be positioned closer to the performer, thereby providing the performer with a more realistic feel.
また、放音ユニット４の放音ケース４１は、鍵盤２を保持する楽器ケース３と一体であってもよいし、着脱可能に構成されてもよい。
また、放音ユニット４とは別に、楽器ケース３の上面又は背面にメインスピーカーを設けてもよい。この場合、例えば、比較的小型である放音ユニット４の各スピーカー４２からは環境音やバックバンド演奏を出力させ、メインスピーカーからは手弾き音声を出力させたりしてもよい。これにより、演奏の没入感を高めることができる。
Furthermore, the sound emitting case 41 of the sound emitting unit 4 may be integral with the instrument case 3 that holds the keyboard 2, or may be configured to be detachable.
Furthermore, a main speaker may be provided on the top or rear surface of the instrument case 3, separate from the sound output unit 4. In this case, for example, the speakers 42 of the relatively small sound output unit 4 may output ambient sounds or backing band performances, while the main speaker may output the sounds of hand-played instruments. This can enhance the sense of immersion in the performance.
また、上記実施形態では、本発明に係る放音装置として、電子楽器１の放音ユニット４を例に挙げて説明した。しかし、本発明に係る放音装置は、電子楽器に設けられるものに限定されず、音声を出力させる各種装置（例えばテレビ、パソコン、ステレオ等）に広く適用できる。 Furthermore, in the above embodiment, the sound emission unit 4 of the electronic musical instrument 1 was used as an example of the sound emission device according to the present invention. However, the sound emission device according to the present invention is not limited to being installed in an electronic musical instrument, and can be widely applied to various devices that output sound (e.g., televisions, personal computers, stereos, etc.).
以上、本発明のいくつかの実施形態を説明したが、本発明の範囲は、上述の実施の形態に限定するものではなく、特許請求の範囲に記載された発明の範囲とその均等の範囲を含む。
以下に、この出願の願書に最初に添付した特許請求の範囲に記載した発明を付記する。付記に記載した請求項の項番は、この出願の願書に最初に添付した特許請求の範囲の通りである。
〔付記〕
＜請求項１＞
直方体の頂点に接する３面に隣接して面取りされた面取り面と、
前記面取り面に配置された放音部と、
を備える、
ことを特徴とする放音装置。
＜請求項２＞
前記面取り面は、複数の頂点に対応した複数の取付部を有し、
前記放音部は、前記複数の取付部に対応した複数の固定部を有する、
ことを特徴とする請求項１に記載の放音装置。
＜請求項３＞
第１方向に長尺な直方体状に形成され、前記第１方向の両側に２つの前記面取り面を有し、当該２つの面取り面に配置された２つの前記放音部を保持するケース部材を備え、
前記２つの面取り面は、互いに異なる方向を向いている、
ことを特徴とする請求項１又は２に記載の放音装置。
＜請求項４＞
前記第１方向は、当該放音装置の前後方向であり、
前記２つの面取り面のうち後側の面取り面は、前側の面取り面よりも上側を向いている、
ことを特徴とする請求項３に記載の放音装置。
＜請求項５＞
第１方向に長尺な直方体状に形成され、前記第１方向の両側に２つの前記面取り面を有し、当該２つの面取り面に配置された２つの前記放音部を保持するケース部材を備え、
前記２つの放音部に対応するとともに、少なくとも一部の構成が共通する２つのバスレフ構造を有する、
ことを特徴とする請求項１から４のいずれか一項に記載の放音装置。
＜請求項６＞
前記ケース部材は、内部空間を前記第１方向に仕切るリブを有し、
前記第１方向に延在し、前記第１方向の両側が、前記リブに仕切られた前記ケース部材の２つの内部空間と個別に連通するダクト部材と、
前記ダクト部材のうち前記第１方向の中央部を外部と連通させる孔部と、
を備える、
ことを特徴とする請求項５に記載の放音装置。
＜請求項７＞
鍵盤と、
前記鍵盤に対する対称位置それぞれに配置された請求項１から６のいずれか一項に記載の放音装置と、
を備える、
ことを特徴とする電子楽器。
Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents.
The inventions described in the claims originally attached to this application are as follows. The claim numbers described in the appendix are the same as those of the claims originally attached to this application.
[Note]
<Claim 1>
chamfered surfaces adjacent to three surfaces that are in contact with the vertices of the rectangular parallelepiped;
a sound emitting portion disposed on the chamfered surface;
Equipped with
A sound emitting device characterized by:
<Claim 2>
the chamfered surface has a plurality of attachment portions corresponding to a plurality of vertices,
The sound emitting unit has a plurality of fixing portions corresponding to the plurality of mounting portions.
2. The sound emitting device according to claim 1.
<Claim 3>
a case member formed in a rectangular parallelepiped shape that is elongated in a first direction, having two of the chamfered surfaces on both sides in the first direction, and holding two of the sound emitting units that are arranged on the two chamfered surfaces;
The two chamfered surfaces face in different directions.
3. The sound emitting device according to claim 1 or 2.
<Claim 4>
the first direction is a front-to-rear direction of the sound emitting device,
Of the two chamfered surfaces, the rear chamfered surface faces upward relative to the front chamfered surface.
4. The sound emitting device according to claim 3.
<Claim 5>
a case member formed in a rectangular parallelepiped shape that is elongated in a first direction, having two of the chamfered surfaces on both sides in the first direction, and holding two of the sound emitting units that are arranged on the two chamfered surfaces;
The speaker has two bass reflex structures corresponding to the two sound emitting sections and having at least a part of the same configuration.
The sound emitting device according to any one of claims 1 to 4.
<Claim 6>
the case member has a rib that divides the internal space in the first direction,
a duct member extending in the first direction, the duct member having both sides in the first direction individually communicating with two internal spaces of the case member partitioned by the rib;
a hole portion that connects a central portion of the duct member in the first direction to the outside;
Equipped with
6. The sound emitting device according to claim 5.
<Claim 7>
The keyboard and
The sound emitting devices according to any one of claims 1 to 6, which are arranged at symmetrical positions with respect to the keyboard;
Equipped with
An electronic musical instrument characterized by:
１ 電子楽器
２ 鍵盤
４ 放音ユニット（放音装置）
４１ 放音ケース（ケース部材）
４２ スピーカー（放音部）
４３ ダクト部材
４３ａ 前側開口部
４３ｂ 後側開口部
４４ ケース底板
４１１ 面取り面
４１１ａ 前側面取り面
４１１ｂ 後側面取り面
４１３ 貫通孔（取付部）
４１４ リブ
４２１ａ 固定部
４４１ 孔部
Ｐ 頂点
Ｓ 内部空間
Ｓ１ 前側空間
Ｓ２ 後側空間
Ｔ 連通管
1 Electronic musical instrument 2 Keyboard 4 Sound emission unit (sound emission device)
41 Sound emitting case (case member)
42 Speaker (sound output unit)
43 Duct member 43a Front opening 43b Rear opening 44 Case bottom plate 411 Chamfered surface 411a Front chamfered surface 411b Rear chamfered surface 413 Through hole (mounting portion)
414 Rib 421a Fixed part 441 Hole P Vertex S Internal space S1 Front space S2 Back space T Communication pipe
Claims (5)
前記ケース部材の下面を閉塞させる蓋部材と、
前記面取り面に配置された放音部と、
前記第１方向に延在し、前記第１方向の両側が、前記リブに仕切られた前記ケース部材の２つの前記内部空間と個別に連通するダクト部材と、を備え、
前記蓋部材のうち前記第１方向の中央部に孔部が形成され、
前記ダクト部材のうち前記第１方向の中央部が前記孔部を通じて外部と連通し、
前記ケース部材は、前記第１方向の両側に２つの前記面取り面を有し、当該２つの面取り面に夫々配置された２つの前記放音部を保持し、
共通する前記ダクト部材と前記孔部とによって、前記２つの放音部に対応する２つのバスレフ構造が形成される、
ことを特徴とする放音装置。 a case member formed in a rectangular parallelepiped shape that is elongated in a first direction, the case member having ribs that divide an internal space in the first direction, and having chamfered surfaces that are chamfered adjacent to three faces that contact vertices of the rectangular parallelepiped;
a cover member that closes the lower surface of the case member;
a sound emitting portion disposed on the chamfered surface;
a duct member extending in the first direction, the duct member having both sides in the first direction individually communicating with the two internal spaces of the case member partitioned by the rib,
a hole is formed in the center of the cover member in the first direction;
a central portion of the duct member in the first direction communicates with the outside through the hole;
the case member has two chamfered surfaces on both sides in the first direction, and holds two of the sound emitting units arranged on the two chamfered surfaces, respectively;
The common duct member and the hole form two bass reflex structures corresponding to the two sound emitting sections.
A sound emitting device characterized by:
前記放音部は、前記複数の取付部に対応した複数の固定部を有する、
ことを特徴とする請求項１に記載の放音装置。 the chamfered surface has a plurality of attachment portions corresponding to a plurality of vertices of the chamfered surface;
The sound emitting unit has a plurality of fixing portions corresponding to the plurality of mounting portions.
2. The sound emitting device according to claim 1.
ことを特徴とする請求項１又は２に記載の放音装置。 The two chamfered surfaces face in different directions.
3. The sound emitting device according to claim 1 or 2.
前記２つの面取り面のうち後側の面取り面は、前側の面取り面よりも上側を向いている、
ことを特徴とする請求項３に記載の放音装置。 the first direction is a front-to-rear direction of the sound emitting device,
Of the two chamfered surfaces, the rear chamfered surface faces upward relative to the front chamfered surface.
4. The sound emitting device according to claim 3.
前記鍵盤に対する対称位置それぞれに配置された請求項１から４のいずれか一項に記載の放音装置と、
を備える、
ことを特徴とする電子楽器。 The keyboard and
The sound emitting devices according to any one of claims 1 to 4, which are arranged at symmetrical positions with respect to the keyboard;
Equipped with
An electronic musical instrument characterized by:
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| JPS5587085U (en) * | 1978-12-13 | 1980-06-16 | ||
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| JP2001356763A (en) | 2000-06-13 | 2001-12-26 | Kawai Musical Instr Mfg Co Ltd | Output control device for electronic musical instruments |
| JP2003263165A (en) | 2002-03-12 | 2003-09-19 | Yamaha Corp | Attachment device |
| JP2004096712A (en) | 2003-04-19 | 2004-03-25 | Atsushi Yokoyama | Speaker unit formed to be fit to shape of room |
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