JP6255876B2 - Silencer - Google Patents

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JP6255876B2
JP6255876B2 JP2013212387A JP2013212387A JP6255876B2 JP 6255876 B2 JP6255876 B2 JP 6255876B2 JP 2013212387 A JP2013212387 A JP 2013212387A JP 2013212387 A JP2013212387 A JP 2013212387A JP 6255876 B2 JP6255876 B2 JP 6255876B2
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main body
fixing
bell
fixing portion
silencer
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JP2015075667A (en
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末永　雄一朗
雄一朗 末永
増田　英之
英之 増田
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Yamaha Corp
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Description

この発明は、消音器に関する。   The present invention relates to a silencer.

トランペットなどの管楽器の音量を少なくする目的で使用される消音器がある。例えば、特許文献１に開示されている消音器は、管楽器のベルの内壁に沿って前端である大径側端から後端である小径側端に向かって外径が小さくなっている略円錐管形状の胴部を有している。そして、この胴部の小径側端近傍の外壁に、胴部の前後方向に沿った窪みが設けられている。この窪みは、消音器を装着して吹奏したときの呼気を消音器外に排出する呼気排出路として機能している。この消音器では、消音器を装着して吹奏したときにベル内に生じる音も、この窪み内を通って消音器外に放音される。   There are silencers that are used to reduce the volume of wind instruments such as trumpet. For example, a silencer disclosed in Patent Document 1 is a substantially conical tube whose outer diameter decreases from a large-diameter side end that is a front end toward a small-diameter side end that is a rear end along the inner wall of a bell of a wind instrument. It has a shaped body. And the hollow along the front-back direction of a trunk | drum is provided in the outer wall near the small diameter side end of this trunk | drum. This depression functions as an exhalation discharge path that discharges exhaled air when the silencer is mounted and played. In this silencer, the sound generated in the bell when the silencer is mounted and played is also emitted outside the silencer through the recess.

特許第４１２４２３６号公報Japanese Patent No. 4124236

ところで、消音器を装着して吹奏したときに放音される音量を調節したいという要求がある。例えば、深夜に消音器を装着して吹奏する場合には、放音される音量を極力小さくする一方、隣人が留守にしているときに消音器を装着して吹奏する場合には、放音される音量を大きくしたい、といった具合である。   By the way, there is a demand for adjusting the volume of sound emitted when a silencer is attached and played. For example, when playing with a silencer at midnight, the sound volume is reduced as much as possible, while when playing with a silencer while the neighbor is away, the sound is emitted. For example, you want to increase the volume.

特許文献１に開示されている消音器は、胴部の外壁に設けられた窪み内を通って放音されるため、消音器を装着して吹奏したときに放音される音量は、この窪みの断面積に依存する。従って、この消音器では、消音器を装着して吹奏したときに放音される音量を調節することは非常に困難である。   Since the silencer disclosed in Patent Document 1 is emitted through a recess provided in the outer wall of the trunk, the volume of sound emitted when the silencer is mounted and played is the recess. Depends on the cross-sectional area. Therefore, with this silencer, it is very difficult to adjust the volume of sound emitted when the silencer is mounted and played.

この発明は以上のような事情に鑑みてなされたものであり、消音器を装着して吹奏したときに放音される音量を調節することができる消音器を提供することを目的としている。   The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a silencer that can adjust the volume of sound emitted when a silencer is attached and played.

この発明は、管楽器のベルに挿入される本体部と、前記ベルに挿入された前記本体部と前記ベルの内壁との間に前記ベル内の空間と前記ベル外の空間とを連通させる隙間を一部形成しつつ、前記本体部と前記ベルとの間を閉塞させる固定部と、前記隙間の断面積を変える断面積可変手段と、を具備することを特徴とする消音器を提供する。   The present invention provides a body portion inserted into a bell of a wind instrument, and a gap for communicating the space inside the bell and the space outside the bell between the body portion inserted into the bell and the inner wall of the bell. There is provided a silencer comprising: a fixing portion that closes between the main body portion and the bell while being partially formed; and a cross-sectional area varying unit that changes a cross-sectional area of the gap.

この発明によれば、ベルに挿入された本体部とベルの内壁との間にベル内の空間とベル外の空間とを連通させる隙間が一部形成され、その隙間の断面積が断面積可変手段によって変えられる。このため、この隙間を通ってベル内からベル外へ放音される音の量が変わる。従って、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to the present invention, a gap is formed between the body portion inserted into the bell and the inner wall of the bell so that the space inside the bell communicates with the space outside the bell, and the cross-sectional area of the gap is variable. It can be changed by means. For this reason, the amount of sound emitted through the gap from inside the bell to outside the bell changes. Therefore, it is possible to adjust the sound volume that is emitted when the silencer is mounted and played.

好ましい態様において、前記断面積可変手段は、前記本体部を内側に収容して前記本体部の軸周りの方向に回転可能な回転部材を有し、前記固定部は、前記本体部の軸周りの方向に並んだ複数の部材であって、各々の間に前記隙間を形成する複数の部材により構成されており、前記固定部の各部材は、前記回転部材に固定される第１の固定部と、前記本体部の外壁に固定される第２の固定部と、を有し、前記第２の固定部に対して前記第１の固定部を前記本体部の軸周りの方向または前記本体部の軸方向に配置したことを特徴とする消音器を提供する。   In a preferred aspect, the cross-sectional area varying means includes a rotating member that accommodates the main body portion inside and is rotatable in a direction around an axis of the main body portion, and the fixing portion is arranged around the axis of the main body portion. A plurality of members arranged in a direction, each of which is formed of a plurality of members that form the gap therebetween, and each member of the fixing portion includes a first fixing portion fixed to the rotating member; A second fixing portion fixed to an outer wall of the main body portion, and the first fixing portion is arranged in a direction around an axis of the main body portion or the main body portion with respect to the second fixing portion. A muffler is provided that is arranged in an axial direction.

この態様によれば、固定部の各部材は、回転部材に固定される第１の固定部と本体部の外壁に固定される第２の固定部を有しており、第１の固定部は、第２の固定部に対して本体部の軸周りの方向または本体部の軸方向に配置されている。回転部材を本体部の軸周りの方向に回転させたとき、回転部材に固定される第１の固定部は当該回転方向に回転する一方、本体部の外壁に固定される第２の固定部は回転しない。このため、回転部材を回転することは、固定部の各部材における本体部の軸周りの方向の長さを変えることと等価になる。従って、回転部材の回転により、本体部とベルとの間における閉塞される部分の断面積が変わり、固定部の各部材の間に形成されるベル内の空間とベル外の空間とを連通させる隙間の断面積が変わる。この隙間を通ってベル内からベル外へ放音される音の量が変わるため、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to this aspect, each member of the fixing portion has the first fixing portion fixed to the rotating member and the second fixing portion fixed to the outer wall of the main body portion, and the first fixing portion is The second fixing portion is disposed in the direction around the axis of the main body portion or in the axial direction of the main body portion. When the rotating member is rotated in the direction around the axis of the main body, the first fixing portion fixed to the rotating member rotates in the rotation direction, while the second fixing portion fixed to the outer wall of the main body is Does not rotate. For this reason, rotating the rotating member is equivalent to changing the length of each member of the fixed portion in the direction around the axis of the main body. Accordingly, the rotation of the rotating member changes the cross-sectional area of the closed portion between the main body portion and the bell, and the space inside the bell formed between the members of the fixing portion and the space outside the bell are communicated. The cross-sectional area of the gap changes. Since the amount of sound emitted from the inside of the bell to the outside of the bell through this gap changes, it is possible to adjust the volume of sound emitted when the silencer is attached and played.

より好ましい態様において、前記固定部の各部材は、前記第２の固定部に対して前記第１の固定部が前記本体部の軸周りの方向に配置されており、伸縮自在な部材からなる伸縮部であって、前記本体部の軸周りの方向の一端において前記第１の固定部に接続され、かつ、他端において前記第２の固定部に接続された伸縮部をさらに有することを特徴とする消音器を提供する。   In a more preferred aspect, each member of the fixing portion is an extension / contraction made of an elastic member in which the first fixing portion is arranged in the direction around the axis of the main body portion with respect to the second fixing portion. A telescopic part connected to the first fixed part at one end in the direction around the axis of the main body part and connected to the second fixed part at the other end. Provide a silencer to do.

この態様によれば、固定部の各部材の伸縮部は、本体部の軸周りの方向の一端において回転部材に固定された第１の固定部に接続されており、他端において本体部の外壁に固定された第２の固定部に接続されている。このため、回転部材を本体部の軸周りの方向に回転すると、伸縮部は、その方向に伸縮する。これにより、固定部の各部材における本体部の軸の周りの方向の長さが変わる。従って、固定部の各部材の間に形成されるベル内の空間とベル外の空間とを連通させる隙間の断面積が変わる。この隙間を通ってベル内からベル外へ放音される音の量が変わるため、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to this aspect, the expansion / contraction portion of each member of the fixing portion is connected to the first fixing portion fixed to the rotating member at one end in the direction around the axis of the main body portion, and the outer wall of the main body portion at the other end. Is connected to a second fixed portion fixed to the head. For this reason, when the rotating member is rotated in the direction around the axis of the main body, the expansion / contraction part expands and contracts in that direction. Thereby, the length of the direction around the axis of the main body portion of each member of the fixed portion changes. Accordingly, the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell formed between the members of the fixed portion changes. Since the amount of sound emitted from the inside of the bell to the outside of the bell through this gap changes, it is possible to adjust the volume of sound emitted when the silencer is attached and played.

より好ましい態様において、前記固定部の各部材は、前記第１の固定部と前記第２の固定部とに分離されており、かつ、前記第２の固定部に対して前記第１の固定部が前記本体部の軸方向に隣接しており、前記回転部材の回転により前記固定部の各々の前記第２の固定部に対して前記固定部の各々の前記第１の固定部が前記本体部の軸周りの方向にずれることを特徴とする消音器を提供する。   In a more preferred aspect, each member of the fixing portion is separated into the first fixing portion and the second fixing portion, and the first fixing portion with respect to the second fixing portion. Are adjacent to each other in the axial direction of the main body portion, and the first fixing portion of each of the fixing portions is set to the main body portion with respect to the second fixing portion of each of the fixing portions by the rotation of the rotating member. The silencer is characterized by being displaced in the direction around the axis.

この態様によれば、回転部材に固定されている各々の第１の固定部と本体部の外壁に固定されている各々の第２の固定部とは、本体部の軸方向に隣接している。回転部材を本体部の軸周りの方向に回転すると、第１の固定部の各部材は、第２の固定部の各部材に対してその方向にずれる。すなわち、固定部の各部材における本体部の軸周りの方向の長さを変えたことと等価になる。これにより、固定部の各部材の間に形成されるベル内の空間とベル外の空間を連通させる隙間の断面積が、第１の固定部と第２の固定部との境界において変わる。この隙間を通ってベル内からベル外へ放音される音の量が変わるため、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to this aspect, each 1st fixing | fixed part currently fixed to the rotation member and each 2nd fixing | fixed part currently fixed to the outer wall of a main-body part are adjacent to the axial direction of a main-body part. . When the rotating member is rotated in the direction around the axis of the main body portion, each member of the first fixing portion is shifted in that direction with respect to each member of the second fixing portion. That is, this is equivalent to changing the length of each member of the fixed portion in the direction around the axis of the main body. Thereby, the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell formed between the members of the fixing portion changes at the boundary between the first fixing portion and the second fixing portion. Since the amount of sound emitted from the inside of the bell to the outside of the bell through this gap changes, it is possible to adjust the volume of sound emitted when the silencer is attached and played.

好ましい態様において、前記固定部は、前記本体部の軸周りの方向に並んだ複数の部材であって、各々の間に前記隙間を形成する複数の部材により構成されており、前記断面積可変手段は、伸縮自在な部材からなる伸縮部を有し、前記固定部の各部材間に前記伸縮部を設けたことを特徴とする消音器を提供する。   In a preferred aspect, the fixing portion is a plurality of members arranged in a direction around the axis of the main body portion, and is constituted by a plurality of members forming the gap therebetween, and the cross-sectional area varying means Provides a silencer having a stretchable portion made of a stretchable member, and providing the stretchable portion between each member of the fixed portion.

この態様によれば、固定部の各部材間に伸縮自在な伸縮部が設けられている。固定部の各部材間に設けられた伸縮部が伸縮することにより、固定部の各部材の間隔が変わる。従って、伸縮部が伸縮することにより、固定部の各部材間に形成されるベル内の空間とベル外の空間とを連通させる隙間の断面積が変わる。この隙間を通ってベル内からベル外へ放音される音の量が変わるため、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to this aspect, the elastic part which can be expanded-contracted between each member of a fixing | fixed part is provided. When the expansion / contraction part provided between the members of the fixed part expands and contracts, the interval between the members of the fixed part changes. Accordingly, the expansion / contraction of the expansion / contraction part changes the cross-sectional area of the gap that connects the space in the bell formed between the members of the fixed part and the space outside the bell. Since the amount of sound emitted from the inside of the bell to the outside of the bell through this gap changes, it is possible to adjust the volume of sound emitted when the silencer is attached and played.

好ましい態様において、前記本体部は、前記本体部の外壁に前記本体部に対して前記固定部を着脱させるための結合部を有し、前記固定部は、前記本体部の軸周りの方向に並んだ複数の固定部本体であって、各々の間に前記隙間を形成する複数の固定部本体と、前記固定部本体の各々を連結するベースと、前記本体部の前記結合部に対応する結合部と、を有し、前記断面積可変手段として、前記固定部本体の各部材の間隔が異なる複数種の前記固定部が用意され、複数種の前記固定部の中から選択した前記固定部を前記本体部に取り付けたことを特徴とする消音器を提供する。   In a preferred aspect, the main body portion has a coupling portion for attaching and detaching the fixing portion with respect to the main body portion on an outer wall of the main body portion, and the fixing portion is arranged in a direction around an axis of the main body portion. A plurality of fixing portion main bodies, each of which forms the gap therebetween, a base connecting each of the fixing portion main bodies, and a coupling portion corresponding to the coupling portion of the main body portion And as the cross-sectional area variable means, a plurality of types of the fixing portions having different intervals between the members of the fixing portion main body are prepared, and the fixing portion selected from a plurality of types of the fixing portions is Provided is a silencer characterized by being attached to a main body.

この態様によれば、固定部本体の各部材の間隔が異なる複数種の固定部が用意されている。複数種の固定部の中から選択された固定部が本体部に取り付けられることにより、固定部本体の各部材の間隔が変わる。従って、固定部の各部材の間に形成されるベル内の空間とベル外の空間とを連通させる隙間の断面積が変わる。この隙間を通ってベル内からベル外へ放音される音の量が変わるため、消音器を装着して吹奏したときに放音される音量を調節することができる。   According to this aspect, a plurality of types of fixing portions having different intervals between the members of the fixing portion main body are prepared. By attaching the fixing portion selected from the plurality of types of fixing portions to the main body portion, the interval between the members of the fixing portion main body changes. Accordingly, the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell formed between the members of the fixed portion changes. Since the amount of sound emitted from the inside of the bell to the outside of the bell through this gap changes, it is possible to adjust the volume of sound emitted when the silencer is attached and played.

この発明の第１実施形態による消音器１の構成を示す側面図、背面図および斜視図である。It is the side view, rear view, and perspective view which show the structure of the silencer 1 by 1st Embodiment of this invention. 同消音器１の構成を示す組み立て図である。2 is an assembly diagram illustrating a configuration of the silencer 1. FIG. 同消音器１における回転部材３０を回転させて固定部２０における胴部１１の軸周りの方向の長さを最も長くしたときの同消音器１の構成を示す側面図、背面図および斜視図である。FIG. 4 is a side view, rear view, and perspective view showing the configuration of the silencer 1 when the rotating member 30 in the silencer 1 is rotated to make the length of the fixed portion 20 in the direction around the axis of the body portion 11 the longest. is there. この発明の第２実施形態による消音器１Ａの構成を示す側面図および背面図である。It is the side view and back view which show the structure of the silencer 1A by 2nd Embodiment of this invention. この発明の第３実施形態による消音器１Ｂの構成を示す側面図および背面図である。It is the side view and back view which show the structure of the silencer 1B by 3rd Embodiment of this invention. この発明の第４実施形態による消音器１Ｃの本体部１０Ｃの構成を示す側面図、同消音器１Ｃの背面図および同消音器１Ｃの固定部２０Ｃの上面図である。It is a side view which shows the structure of the main-body part 10C of the silencer 1C by 4th Embodiment of this invention, the rear view of the silencer 1C, and the top view of the fixing | fixed part 20C of the silencer 1C.

以下、図面を参照し、この発明の実施形態について説明する。
＜第１実施形態＞
本実施形態による消音器１は、トランペット用の消音器である。以下、本明細書では、トランペットの中心からマウスピースに向かう方向を後方と呼び、トランペットの中心からベルに向かう方向を前方と呼ぶ。図１（Ａ）は、この発明の第１実施形態による消音器１の構成を示す側面図であり、図１（Ｂ）は、後方から同消音器１を見たときの同消音器１の構成を示す背面図であり、図１（Ｃ）は、斜め後方から同消音器１を見たときの同消音器１の構成を示す斜視図である。また、図２は、同消音器１の構成を示す組み立て図である。図１および２に示すように、消音器１は、本体部１０と、固定部２０と、回転部材３０とを有する。本体部１０は、胴部１１と底部１２とから構成されている。 Embodiments of the present invention will be described below with reference to the drawings.
<First Embodiment>
The silencer 1 according to this embodiment is a silencer for trumpet. Hereinafter, in this specification, the direction from the center of the trumpet toward the mouthpiece is referred to as the rear, and the direction from the center of the trumpet toward the bell is referred to as the front. FIG. 1 (A) is a side view showing the configuration of the silencer 1 according to the first embodiment of the present invention, and FIG. 1 (B) shows the silencer 1 when the silencer 1 is viewed from the rear. FIG. 1C is a perspective view showing the configuration of the silencer 1 when the silencer 1 is viewed from obliquely behind. FIG. 2 is an assembly diagram showing the configuration of the silencer 1. As shown in FIGS. 1 and 2, the silencer 1 includes a main body portion 10, a fixing portion 20, and a rotating member 30. The main body 10 is composed of a body 11 and a bottom 12.

胴部１１は、胴部１１の内側に空洞を有する略円錐管形状の中空の管体である。胴部１１は、前端である大径側端１１ａから後端である小径側端１１ｂに向かってトランペットのベルの内壁に沿うようにして外径および内径が小さくなっている。ここで、管楽器（トランペット）におけるベルとは、音量を増大させるために管楽器の管の径が徐々に広げられた呼気の排出口付近の部分のことを言う。また、後端である小径側端１１ｂは、開口しており、開口端となっている。   The trunk portion 11 is a hollow tube having a substantially conical tube shape having a cavity inside the trunk portion 11. The body 11 has an outer diameter and an inner diameter that are reduced along the inner wall of the bell of the trumpet from the large-diameter end 11a that is the front end toward the small-diameter end 11b that is the rear end. Here, the bell in the wind instrument (trumpet) refers to a portion in the vicinity of the exhalation air outlet where the diameter of the wind instrument tube is gradually widened in order to increase the volume. The small-diameter side end 11b, which is the rear end, is open and is an open end.

底部１２は、椀状をなしている。底部１２は、その外面が外側方向（前方）に突出する凸曲面となるように湾曲している湾曲部１２ａと、外径が一定である筒状部１２ｂとから構成されている。湾曲部１２ａの縁の部分は筒状部１２ｂの一端に連続している。湾曲部１２ａの突出している中央部分は、胴部１１の回転軸（以下、単に軸という）近傍に位置している。筒状部１２ｂにおける湾曲部１２ａに連続している端の反対側の端（底部１２の縁の部分）は、胴部１１の大径側端１１ａと接着剤等により接合している。底部１２は、胴部１１の前端である大径側端１１ａを閉塞する閉塞部として機能し、大径側端１１ａは閉塞端となっている。   The bottom 12 has a bowl shape. The bottom part 12 is comprised from the curved part 12a which curves so that the outer surface may become a convex curved surface which protrudes to an outer side direction (front), and the cylindrical part 12b with a constant outer diameter. The edge portion of the curved portion 12a is continuous with one end of the cylindrical portion 12b. The protruding central portion of the curved portion 12a is located in the vicinity of the rotation axis (hereinafter simply referred to as an axis) of the body portion 11. The end of the cylindrical portion 12b opposite to the end continuous with the curved portion 12a (the edge portion of the bottom portion 12) is joined to the large-diameter side end 11a of the body portion 11 with an adhesive or the like. The bottom portion 12 functions as a closed portion that closes the large-diameter side end 11a that is the front end of the body portion 11, and the large-diameter side end 11a is a closed end.

小径側端１１ｂに至る小径側端１１ｂ近傍の胴部１１の外壁には、その外径が少し小さくなるように浅い溝１３が設けられている。溝１３は、胴部１１の軸の周りに亙って設けられている。また、小径側端１１ｂ近傍の胴部１１の外壁には、この溝１３における小径側端１１ｂの反対側の端から胴部１１の大径側端１１ａ方向に向かう複数の浅い溝１４が設けられている。この溝１４は、側面から見たときに台形となる形状であり、平面上に展開したときに扇形となる形状をなしている。溝１４の深さは、溝１３の深さと同程度である。また、溝１４は、胴部１１の軸周りの方向の１２０度毎に各々設けられている。そして、溝１４と溝１４が設けられていない通常部１５とが、胴部１１の軸の周りに沿って交互に繰り返されている。   A shallow groove 13 is provided on the outer wall of the body portion 11 in the vicinity of the small diameter side end 11b reaching the small diameter side end 11b so that the outer diameter is slightly reduced. The groove 13 is provided around the axis of the trunk portion 11. A plurality of shallow grooves 14 are provided on the outer wall of the body portion 11 in the vicinity of the small diameter side end 11b from the end opposite to the small diameter side end 11b in the groove 13 toward the large diameter side end 11a of the body portion 11. ing. The groove 14 has a trapezoidal shape when viewed from the side, and has a fan-shaped shape when deployed on a plane. The depth of the groove 14 is approximately the same as the depth of the groove 13. Further, the groove 14 is provided at every 120 degrees in the direction around the axis of the trunk portion 11. And the normal part 15 in which the groove | channel 14 and the groove | channel 14 are not provided is repeated along the periphery of the axis | shaft of the trunk | drum 11 alternately.

回転部材３０は、筒状部３１と羽根部３２とから構成されている。筒状部３１は、略円錐管形状をなしている。筒状部材３１は、その大径側端から小径側端に向かってベルの内壁に沿うようにして外径および内径が小さくなっている。筒状部３１の回転軸（以下、単に軸という）方向の長さは、胴部１１の溝１３における軸方向の長さと同程度である。筒状部３１の内径は、胴部１１の溝１３の部分における胴部１１の外径よりも若干大きくなっている。筒状部３１の厚さは、溝１３の深さと同程度である。   The rotating member 30 includes a cylindrical part 31 and a blade part 32. The cylindrical portion 31 has a substantially conical tube shape. The cylindrical member 31 has an outer diameter and an inner diameter that decrease along the inner wall of the bell from the large-diameter end to the small-diameter end. The length of the cylindrical portion 31 in the direction of the rotation axis (hereinafter simply referred to as an axis) is approximately the same as the length in the axial direction of the groove 13 of the body portion 11. The inner diameter of the cylindrical portion 31 is slightly larger than the outer diameter of the barrel portion 11 in the groove 13 portion of the barrel portion 11. The thickness of the cylindrical portion 31 is approximately the same as the depth of the groove 13.

回転部材３０の羽根部３２は、湾曲している板状の部材である。羽根部３２は、側面から見たときに台形となる形状であり、平面上に展開したときに扇形となる形状をなしている。羽根部３２は、筒状部３１の軸周りの方向の１２０度毎に各々配置されている。そして、羽根部３２における側面から見たときに台形の上底となる部分が、筒状部３１の大径側端に接続されている。このとき、羽根部３２は、その凸曲面が筒状部３１の外面に連続するように接続されている。また、羽根部３２は、筒状部３１に接続されている端から反対側の端に向かうに従って、ベルの内壁に沿うようにして筒状部３１の軸から遠ざかる方向に広がっている。羽根部３２における筒状部３１の軸方向の長さは、胴部１１の溝１４部分の軸方向の長さと同程度である。羽根部３２における筒状部３１の軸周りの方向の長さ（すなわち羽根部３２の幅）は、胴部１１の溝１４部分の軸周りの方向の長さ（すなわち溝１４の幅）よりも短くなっている。羽根部３２の厚さは、溝１４の深さと同程度である。   The blade portion 32 of the rotating member 30 is a curved plate-like member. The blade portion 32 has a trapezoidal shape when viewed from the side, and has a fan-shaped shape when deployed on a plane. The blade portions 32 are arranged at every 120 degrees in the direction around the axis of the cylindrical portion 31. And the part used as the upper base of trapezoid when it sees from the side surface in the blade | wing part 32 is connected to the large diameter side end of the cylindrical part 31. FIG. At this time, the blade portion 32 is connected so that its convex curved surface is continuous with the outer surface of the cylindrical portion 31. Further, the blade 32 extends in a direction away from the axis of the tubular portion 31 along the inner wall of the bell as it goes from the end connected to the tubular portion 31 to the opposite end. The axial length of the cylindrical portion 31 in the blade portion 32 is approximately the same as the axial length of the groove 14 portion of the body portion 11. The length of the blade portion 32 in the direction around the axis of the cylindrical portion 31 (that is, the width of the blade portion 32) is greater than the length in the direction around the axis of the groove 14 portion of the body portion 11 (ie, the width of the groove 14). It is getting shorter. The thickness of the blade portion 32 is approximately the same as the depth of the groove 14.

回転部材３０は、本体部１０を内側に収容している。より詳細には、回転部材３０の筒状部３１は胴部１１の溝１３の上に重なっており、回転部材３０の羽根部３２は胴部１１の溝１４内に収容されている。また、回転部材３０の回転軸（以下、単に軸という）は、胴部１１の軸と重なっている。このため、回転部材３０は、胴部１１の外壁上において胴部１１に対して胴部１１の軸周りの方向に回転可能である。回転部材３０を回転させると、羽根部３２は、溝１４内において胴部１１の軸周りの方向（溝１４の幅方向）に移動する。そして、回転部材３０の回転量を大きくすると、羽根部３２は、溝１４と通常部１５との境界における段差に引っ掛かって止まる。すなわち、溝１４の幅寸法と羽根部３２の幅寸法により回転部材３０の回転可能範囲が決定される。   The rotating member 30 accommodates the main body 10 inside. More specifically, the cylindrical portion 31 of the rotating member 30 overlaps the groove 13 of the trunk portion 11, and the blade portion 32 of the rotating member 30 is accommodated in the groove 14 of the trunk portion 11. Further, the rotation axis of the rotation member 30 (hereinafter simply referred to as the axis) overlaps with the axis of the body portion 11. For this reason, the rotating member 30 can rotate in the direction around the axis of the trunk 11 with respect to the trunk 11 on the outer wall of the trunk 11. When the rotating member 30 is rotated, the blade portion 32 moves in the groove 14 in a direction around the axis of the trunk portion 11 (width direction of the groove 14). When the rotation amount of the rotating member 30 is increased, the blade portion 32 is caught by a step at the boundary between the groove 14 and the normal portion 15 and stops. That is, the rotatable range of the rotating member 30 is determined by the width dimension of the groove 14 and the width dimension of the blade portion 32.

固定部２０は、胴部１１の軸周りの方向に複数個並べられている。固定部２０は、Ｕ字形のブロック状をなしている。固定部２０は、本体側部２１、回転部材側部２２および連結部２３から構成される。本体側部２１、回転部材側部２２および連結部２３は、各々、胴部１１の軸周りの方向に配置されている。より詳細には、後方から固定部２０を見たときに、本体側部２１に対して時計回り方向に連結部２３が配置され、さらにその連結部２３に対して時計回り方向に回転部材側部２２が配置されている。本体側部２１および回転部材側部２２は、湾曲しているブロック状部材である。本体側部２１および回転部材側部２２は、例えば、コルクや硬めのスポンジゴムなど、あまり伸縮せず、適度な硬度と摩擦性能を有する柔軟な素材により形成される。本体側部２１は、その凸曲面が外側となるようにして、胴部１１の通常部１５の外壁に固定されている。一方、回転部材側部２２は、その凸曲面が外側となるようにして、回転部材３０の羽根部３２の外壁に固定されている。連結部２３は、例えば、スポンジゴムなど、容易に伸縮する柔軟な素材により形成される。連結部２３は、胴部１１の軸周りの方向の一端において回転部材３０に固定されている回転部材側部２２に接続されており、かつ、他端において胴部１１に固定されている本体側部２１に接続されている。また、本体側部２１、回転部材側部２２および連結部２３の各々における胴部１１の軸から遠ざかる方向の長さ（すなわち本体側部２１の高さ、回転部材側部２２の高さおよび連結部２３の高さ）は、同程度である。なお、固定部２０は、胴部１１の軸周りの方向の１２０度毎に３個設けられているが、固定部２０の数および配置はこれに限られない。胴部１１の溝１４、胴部１１の通常部１５および回転部材３０の羽根部３２の各々における数およびそれらの配置についても同様である。   A plurality of the fixing portions 20 are arranged in the direction around the axis of the trunk portion 11. The fixing portion 20 has a U-shaped block shape. The fixing unit 20 includes a main body side portion 21, a rotating member side portion 22, and a connecting portion 23. The main body side portion 21, the rotating member side portion 22, and the connecting portion 23 are each disposed in a direction around the axis of the trunk portion 11. More specifically, when the fixed portion 20 is viewed from the rear, the connecting portion 23 is disposed in the clockwise direction with respect to the main body side portion 21, and further, the rotating member side portion in the clockwise direction with respect to the connecting portion 23. 22 is arranged. The main body side portion 21 and the rotating member side portion 22 are curved block-like members. The main body side portion 21 and the rotating member side portion 22 are formed of a flexible material that does not expand or contract so much, such as cork or hard sponge rubber, and has appropriate hardness and friction performance. The main body side portion 21 is fixed to the outer wall of the normal portion 15 of the trunk portion 11 such that the convex curved surface is on the outside. On the other hand, the rotating member side portion 22 is fixed to the outer wall of the blade portion 32 of the rotating member 30 such that the convex curved surface is on the outside. The connecting portion 23 is formed of a flexible material that easily expands and contracts, such as sponge rubber, for example. The connecting portion 23 is connected to the rotating member side portion 22 fixed to the rotating member 30 at one end in the direction around the axis of the trunk portion 11, and the main body side fixed to the trunk portion 11 at the other end. Connected to the unit 21. Further, the length in the direction away from the axis of the trunk portion 11 in each of the main body side portion 21, the rotating member side portion 22, and the connecting portion 23 (that is, the height of the main body side portion 21, the height of the rotating member side portion 22, and the connection). The height of the part 23 is about the same. In addition, although the three fixing | fixed parts 20 are provided for every 120 degree | times of the direction around the axis | shaft of the trunk | drum 11, the number and arrangement | positioning of the fixing | fixed part 20 are not restricted to this. The same applies to the number of the grooves 14 of the body part 11, the normal part 15 of the body part 11, and the blade part 32 of the rotating member 30, and their arrangement.

固定部２０の本体側部２１は、胴部１１の通常部１５に固定されているため、回転部材３０を回転させても回転部材３０とともに移動しない。一方、固定部２０の回転部材側部２２は、回転部材３０の羽根部３２に固定されているため、回転部材３０の回転に伴って、羽根部３２とともに胴部１１の軸周りの方向に移動する。また、本体側部２１と回転部材側部２２とを連結する連結部２３は、回転部材３０の回転に伴って、胴部１１の軸周りの方向に伸縮する。このため、回転部材３０を回転させることにより、固定部２０における胴部１１の軸周りの方向の長さ（すなわち固定部２０の幅）を変えることができる。一方、固定部２０における胴部１１の軸から遠ざかる方向の長さ（すなわち固定部２０の高さ）は、回転部材３０を回転させても変わらない。   Since the main body side portion 21 of the fixing portion 20 is fixed to the normal portion 15 of the trunk portion 11, the main body side portion 21 does not move together with the rotating member 30 even if the rotating member 30 is rotated. On the other hand, since the rotating member side portion 22 of the fixed portion 20 is fixed to the blade portion 32 of the rotating member 30, it moves in the direction around the axis of the trunk portion 11 together with the blade portion 32 as the rotating member 30 rotates. To do. Further, the connecting portion 23 that connects the main body side portion 21 and the rotating member side portion 22 expands and contracts in the direction around the axis of the trunk portion 11 as the rotating member 30 rotates. For this reason, by rotating the rotating member 30, the length of the fixed portion 20 in the direction around the axis of the trunk portion 11 (that is, the width of the fixed portion 20) can be changed. On the other hand, the length of the fixed portion 20 in the direction away from the axis of the body portion 11 (that is, the height of the fixed portion 20) does not change even when the rotating member 30 is rotated.

また、本体部１０と回転部材３０との間（例えば、胴部１１の溝１４と回転部材３０の羽根部３２との間など）には、回転させた回転部材３０の位置（回転角度）を保持する機構（例えば、ラチェット機構）が設けられている（図示略）。これにより、固定部２０の連結部が縮もうとする力に抗して回転部材３０の位置（回転角度）を保持することができる。   Further, the position (rotation angle) of the rotated rotating member 30 is set between the main body 10 and the rotating member 30 (for example, between the groove 14 of the trunk portion 11 and the blade portion 32 of the rotating member 30). A holding mechanism (for example, a ratchet mechanism) is provided (not shown). Thereby, the position (rotation angle) of the rotating member 30 can be held against the force that the connecting portion of the fixed portion 20 tries to contract.

消音器１をトランペットのベル内に挿入すると、固定部２０における本体側部２１、回転部材側部２２および連結部２３の各々の外壁がベルの内壁に当接し、本体部１０はベルに固定される。固定部２０における本体側部２１、回転部材側部２２および連結部２３の各々は、本体部１０とベルとの間を閉塞させる。しかし、各固定部２０同士は接触していないため、隣り合う固定部２０と本体部１０とベルとにより隙間が形成される。すなわち、固定部２０は、本体部１０とベルとの間にベル内の空間とベル外の空間とを連通させる隙間を一部形成しつつ本体部とベルとの間を閉塞させている。ここで、ベル内の空間とは、消音器の装着により当該消音器によって閉塞された管楽器（トランペット）の内側の空間のことを言い、ベル外の空間とは、同管楽器の外側の空間のことを言う。ベル内の空間とベル外の空間とを連通させる隙間は、消音器１を装着して吹奏したときの呼気をベル内からベル外に排気するとともに、ベル内に生じる音をベル内からベル外に放音する役割を担う。   When the silencer 1 is inserted into the bell of the trumpet, the outer walls of the main body side portion 21, the rotating member side portion 22 and the connecting portion 23 of the fixing portion 20 abut against the inner wall of the bell, and the main body portion 10 is fixed to the bell. The Each of the main body side portion 21, the rotating member side portion 22 and the connecting portion 23 in the fixing portion 20 closes the space between the main body portion 10 and the bell. However, since the respective fixing portions 20 are not in contact with each other, a gap is formed by the adjacent fixing portion 20, the main body portion 10, and the bell. In other words, the fixing portion 20 closes the space between the main body portion and the bell while forming a part of the gap between the main body portion 10 and the bell so that the space inside the bell communicates with the space outside the bell. Here, the space inside the bell means the space inside the wind instrument (trumpet) closed by the silencer when the silencer is attached, and the space outside the bell means the space outside the wind instrument. Say. The gap that communicates the space inside the bell and the space outside the bell exhausts the exhaled air when the silencer 1 is attached to the outside of the bell and blows the sound generated in the bell from the bell to the outside of the bell. It plays a role to emit sound.

図１は、後方から消音器１を見たときにおける反時計回り方向に回転部材３０を最大限に回転させた場合を示している。このとき、回転部材３０の羽根部３２は、胴部１１の溝１４に対して反時計回り方向に隣接する通常部１５と当該溝１４との間の境界部分の段差に当接する。そして、回転部材３０を回転させたときの各状態に比べ、この状態における連結部２３は最も縮まり、この状態における固定部２０の幅は最も小さくなる。   FIG. 1 shows a case where the rotating member 30 is rotated to the maximum in the counterclockwise direction when the silencer 1 is viewed from the rear. At this time, the blade portion 32 of the rotating member 30 comes into contact with the step at the boundary portion between the normal portion 15 adjacent to the groove 14 of the trunk portion 11 in the counterclockwise direction and the groove 14. And compared with each state when rotating the rotation member 30, the connection part 23 in this state shrink | contracts most, and the width | variety of the fixing | fixed part 20 in this state becomes the smallest.

この状態（すなわち図１に示す状態）で本体部１０をベルに固定した場合、固定部２０の幅が最も小さいため、本体部１０とベルとの間における閉塞される部分の断面積が最も小さくなる。一方、各固定部２０の間隔は最も大きくなる。このため、隣り合う固定部２０と本体部１０とベルとにより形成される隙間の断面積は最も大きくなる。この場合、この隙間を通過する音が多くなるため、大きな音量の音が消音器１外に放音されることになる。換言すると、この場合、消音器１の弱音の度合いは小さくなる。   When the main body 10 is fixed to the bell in this state (that is, the state shown in FIG. 1), the width of the fixing portion 20 is the smallest, so that the cross-sectional area of the closed portion between the main body 10 and the bell is the smallest. Become. On the other hand, the interval between the fixing portions 20 is the largest. For this reason, the cross-sectional area of the clearance gap formed by the adjacent fixing | fixed part 20, the main-body part 10, and a bell becomes the largest. In this case, since the sound passing through this gap increases, a sound with a large volume is emitted outside the silencer 1. In other words, in this case, the degree of weak sound of the silencer 1 is reduced.

一方、図３は、後方から消音器１を見たときにおける時計回り方向に回転部材３０を最大限に回転させた場合の消音器１の構成を示す側面図、背面図および斜視図である。このとき、回転部材３０の羽根部３２は、胴部１１の溝１４に対して時計回り方向に隣接する通常部１５と当該溝１４との間の境界部分の段差に当接する。そして、回転部材３０を回転させたときの各状態に比べ、この状態における連結部２３は最も伸び、この状態における固定部２０の幅は最も大きくなる。また、このように固定部２０の幅が最も大きくなっても、隣り合う固定部２０同士は互いに接触しない。   On the other hand, FIG. 3 is a side view, a rear view, and a perspective view showing the configuration of the silencer 1 when the rotating member 30 is rotated to the maximum in the clockwise direction when the silencer 1 is viewed from the rear. At this time, the blade portion 32 of the rotating member 30 comes into contact with a step at a boundary portion between the normal portion 15 adjacent to the groove 14 of the trunk portion 11 in the clockwise direction and the groove 14. And compared with each state when rotating the rotation member 30, the connection part 23 in this state is extended most, and the width | variety of the fixing | fixed part 20 in this state becomes the largest. Further, even if the width of the fixing portion 20 is maximized in this way, the adjacent fixing portions 20 do not contact each other.

この状態（すなわち図３に示す状態）で本体部１０をベルに固定した場合、固定部２０の幅が最も大きいため、本体部１０とベルとの間における閉塞される部分の断面積が最も大きくなる。一方、各固定部２０の間隔は最も小さくなる。このため、隣り合う固定部２０と本体部１０とベルとにより形成される隙間の断面積は最も小さくなる。この場合、この隙間を通過する音が少なくなるため、小さな音量の音が消音器１外に放音されることになる。換言すると、この場合、消音器１の弱音の度合いは大きくなる。なお、本体部１０とベルとの間に形成されるすべての隙間の断面積を合計した総断面積は、マウスピースの最小断面積以上にすることが好ましい。   When the main body portion 10 is fixed to the bell in this state (ie, the state shown in FIG. 3), the width of the fixing portion 20 is the largest, so that the cross-sectional area of the closed portion between the main body portion 10 and the bell is the largest. Become. On the other hand, the interval between the fixed portions 20 is the smallest. For this reason, the cross-sectional area of the clearance gap formed by the adjacent fixing | fixed part 20, the main-body part 10, and a bell becomes the smallest. In this case, since the sound passing through the gap is reduced, a sound with a small volume is emitted outside the silencer 1. In other words, in this case, the degree of weak sound of the silencer 1 is increased. In addition, it is preferable that the total cross-sectional area obtained by summing the cross-sectional areas of all the gaps formed between the main body 10 and the bell is equal to or larger than the minimum cross-sectional area of the mouthpiece.

回転部材３０は、溝１４内において羽根部３２が移動することができる範囲内における各位置に保持され得る。このため、羽根部３２に固定されている固定部２０の回転部材側部２２も、羽根部３２の移動に伴って、同範囲内における各位置に保持され得る。これにより、固定部２０は、回転部材３０を反時計回り方向に最大限に回転させたときの固定部２０の幅寸法と回転部材３０を時計回り方向に最大限に回転させたときの固定部２０の幅寸法との間の範囲における固定部２０の各幅寸法をとり得る。すなわち、消音器１が装着されたときにおける隣り合う固定部２０と本体部１０とベルとにより形成される隙間は、回転部材３０を反時計回り方向に最大限に回転させたときの同隙間の断面積と、回転部材３０を時計回り方向に最大限に回転させたときの同隙間の断面積との間の範囲における同隙間の各断面積をとり得る。そして、回転部材３０の反時計回り方向の回転量を多くするに従って同隙間の断面積が大きくなり、放音される音量が大きくなり、消音器１の弱音の度合いが小さくなる。反対に、回転部材３０の時計回り方向の回転量を多くするに従って同隙間の断面積が小さくなり、放音される音量が小さくなり、消音器１の弱音の度合いが大きくなる。   The rotating member 30 can be held at each position within a range in which the blade portion 32 can move in the groove 14. For this reason, the rotating member side portion 22 of the fixed portion 20 fixed to the blade portion 32 can also be held at each position within the same range as the blade portion 32 moves. Thereby, the fixed part 20 has the width dimension of the fixed part 20 when the rotary member 30 is rotated to the maximum in the counterclockwise direction and the fixed part when the rotary member 30 is rotated to the maximum in the clockwise direction. Each width dimension of the fixing | fixed part 20 in the range between 20 width dimensions can be taken. That is, when the silencer 1 is mounted, the gap formed by the adjacent fixing portion 20, the main body portion 10, and the bell is the same gap when the rotating member 30 is rotated to the maximum in the counterclockwise direction. Each cross-sectional area of the gap in a range between the cross-sectional area and the cross-sectional area of the gap when the rotating member 30 is rotated to the maximum in the clockwise direction can be taken. Then, as the amount of rotation of the rotating member 30 in the counterclockwise direction is increased, the cross-sectional area of the gap is increased, the volume of sound emitted is increased, and the degree of weak sound of the silencer 1 is decreased. On the other hand, as the amount of rotation of the rotating member 30 in the clockwise direction is increased, the cross-sectional area of the gap is reduced, the volume of sound emitted is reduced, and the degree of sound attenuation of the silencer 1 is increased.

このように、回転部材３０を回転させることにより、固定部２０を伸縮させて、ベル内の空間とベル外の空間とを連通させる隙間の断面積を変化させることができる。すなわち、回転部材３０は、その隙間の断面積を変える断面積可変手段である。
以上が、消音器１の構成である。 Thus, by rotating the rotating member 30, the fixing portion 20 can be expanded and contracted to change the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell. That is, the rotating member 30 is a cross-sectional area variable means for changing the cross-sectional area of the gap.
The above is the configuration of the silencer 1.

次に、本実施形態による消音器１の使用態様を説明する。まず、消音器１を装着して吹奏したときに放音される音量を小さくしたい場合について説明する。ユーザ（吹奏者）は、消音器１における回転部材３０の筒状部３１の外壁を掴み、掴んだ筒状部３１を後方から消音器１を見たときにおける時計回り方向に回転させる。このとき、音量をより小さくしたい場合には、筒状部３１の時計回り方向の回転量を多くする。筒状部３１を時計回り方向に回転させることにより、羽根部３２も同様に回転し、羽根部３２に固定されている固定部２０の回転部材側部２２が時計回り方向に移動する。そして、固定部２０における胴部１１の軸周りの方向の長さが長くなる（固定部２０の幅が大きくなる）。このとき、回転させた回転部材３０の位置（回転角度）は保持される。回転部材３０を回転させた後、ユーザは、消音器１をトランペットに装着する。そして、消音器１を装着したトランペットを吹奏すると、回転部材３０の位置（回転角度）に従った小さな音量の音が放音される。   Next, the usage aspect of the silencer 1 by this embodiment is demonstrated. First, the case where it is desired to reduce the volume of sound emitted when the silencer 1 is worn and played is described. A user (singer) grasps the outer wall of the tubular portion 31 of the rotating member 30 in the silencer 1 and rotates the grasped tubular portion 31 in the clockwise direction when the silencer 1 is viewed from the rear. At this time, in order to reduce the volume, the amount of rotation of the cylindrical portion 31 in the clockwise direction is increased. By rotating the cylindrical portion 31 in the clockwise direction, the blade portion 32 is similarly rotated, and the rotating member side portion 22 of the fixed portion 20 fixed to the blade portion 32 moves in the clockwise direction. Then, the length of the fixed portion 20 in the direction around the axis of the body portion 11 is increased (the width of the fixed portion 20 is increased). At this time, the position (rotation angle) of the rotated rotating member 30 is maintained. After rotating the rotating member 30, the user attaches the silencer 1 to the trumpet. When a trumpet equipped with the silencer 1 is played, a sound with a small volume according to the position (rotation angle) of the rotating member 30 is emitted.

一方、消音器１を装着して吹奏したときに放音される音量を大きくしたい場合、ユーザは、掴んだ筒状部材３１を反時計回りに回転させれば良い。このとき、音量をより大きくしたい場合には、筒状部３１の反時計回り方向の回転量を多くする。筒状部材３１を反時計回り方向に回転させることにより、羽根部３２も同様に回転し、羽根部３２に固定されている固定部２０の回転部材側部２２が反時計回り方向に移動する。そして、固定部２０における胴部１１の軸周りの方向の長さが短くなる（固定部２０の幅が小さくなる）。このとき、回転させた回転部材３０の位置（回転角度）は保持される。回転部材３０を回転させた後、ユーザは、消音器１をトランペットに装着する。そして、消音器１を装着したトランペットを吹奏すると、回転部材の位置（回転角度）に従った大きな音量の音が放音される。   On the other hand, when it is desired to increase the volume of sound emitted when the silencer 1 is mounted and played, the user may rotate the gripped cylindrical member 31 counterclockwise. At this time, in order to increase the volume, the amount of rotation of the cylindrical portion 31 in the counterclockwise direction is increased. By rotating the cylindrical member 31 in the counterclockwise direction, the blade portion 32 rotates in the same manner, and the rotating member side portion 22 of the fixed portion 20 fixed to the blade portion 32 moves in the counterclockwise direction. Then, the length of the fixed portion 20 in the direction around the axis of the body portion 11 is shortened (the width of the fixed portion 20 is reduced). At this time, the position (rotation angle) of the rotated rotating member 30 is maintained. After rotating the rotating member 30, the user attaches the silencer 1 to the trumpet. When a trumpet equipped with the silencer 1 is played, a loud sound according to the position (rotation angle) of the rotating member is emitted.

このように、本実施形態による消音器１は、本体部１０と、本体部１０の外壁とベルの内壁との間を閉塞させる固定部２０と、本体部１０を内側に収容して本体部１０の軸周りの方向に回転可能な回転部材３０とを有している。固定部２０は、本体部の軸周りの方向に複数個並べられており、各固定部２０の間にベル内の空間とベル外の空間とを連通させる隙間を形成する。各固定部２０は、回転部材３０に固定される回転部材側部２２と、胴部１１に固定される本体側部２１と、伸縮自在な連結部２３とを有し、これら各部は、胴部１１の軸周りの方向に配置されている。連結部２３は、胴部１１の軸周りの方向の一端において回転部材側部２２に接続され、かつ、他端において本体側部２１に接続されている。このため、回転部材３０の回転により、連結部２３が胴部１１の軸周りの方向に伸縮し、固定部２０における本体部１０の軸周りの方向の長さ（すなわち固定部２０の幅）が変わる。固定部２０の幅が変わるため、本体部１０とベルとの間における閉塞される部分の断面積が変わる。これにより、各固定部２０と本体部１０とベルとの間に形成される隙間の断面積が変わる。この隙間の断面積が変わることにより、この隙間を通過する音の量が変わる。従って、本発明の消音器１では、回転部材３０を回転した後にトランペットに装着することにより、消音器１を装着して吹奏したときに放音される音量を調節することができる。換言すると、消音器１の弱音の度合いを調節することができる。   Thus, the silencer 1 according to the present embodiment includes the main body 10, the fixing portion 20 that closes the space between the outer wall of the main body 10 and the inner wall of the bell, and the main body 10 by accommodating the main body 10 inside. And a rotating member 30 that is rotatable in the direction around the axis. A plurality of the fixing parts 20 are arranged in the direction around the axis of the main body part, and a gap is formed between each fixing part 20 to communicate the space inside the bell and the space outside the bell. Each fixing portion 20 includes a rotating member side portion 22 fixed to the rotating member 30, a main body side portion 21 fixed to the trunk portion 11, and a telescopic connecting portion 23. 11 are arranged in directions around the axis. The connecting portion 23 is connected to the rotating member side portion 22 at one end in the direction around the axis of the body portion 11 and connected to the main body side portion 21 at the other end. For this reason, due to the rotation of the rotating member 30, the connecting portion 23 expands and contracts in the direction around the axis of the body portion 11, and the length of the fixing portion 20 in the direction around the axis of the main body portion 10 (that is, the width of the fixing portion 20). change. Since the width of the fixing portion 20 changes, the cross-sectional area of the closed portion between the main body portion 10 and the bell changes. Thereby, the cross-sectional area of the clearance gap formed between each fixing | fixed part 20, the main-body part 10, and a bell changes. As the cross-sectional area of the gap changes, the amount of sound passing through the gap changes. Therefore, in the silencer 1 of the present invention, the volume of sound emitted when the silencer 1 is mounted and played is adjusted by attaching the trumpet after rotating the rotating member 30. In other words, the degree of weak sound of the silencer 1 can be adjusted.

＜第２実施形態＞
図４（Ａ）および（Ｃ）は、この発明の第２実施形態による消音器１Ａの構成を示す側面図であり、図４（Ｂ）および（Ｄ）は、後方から同消音器１Ａを見たときの同消音器１Ａの構成を示す背面図である。本実施形態による消音器１Ａは、本体部１０に代えて本体部１０Ａとし（より具体的には胴部１１に代えて胴部１１Ａとし）、回転部材３０に代えて回転部材３０Ａとし、固定部２０に代えて固定部２０Ａとした点で第１実施形態による消音器１と異なる。本実施形態における固定部２０Ａは、第１固定部２０Ａ１と第２固定部２０Ａ２とから構成されている。本実施形態による消音器１Ａは、第２固定部２０Ａ２に対して第１固定部２０Ａ１を回転させることにより、ベル内の空間とベル外の空間とを連通させる隙間の断面積を胴部１１Ａの軸の途中の位置において可変としたものである。 Second Embodiment
4 (A) and 4 (C) are side views showing the configuration of the silencer 1A according to the second embodiment of the present invention. FIGS. 4 (B) and 4 (D) show the silencer 1A from the rear. It is a rear view which shows the structure of the silencer 1A at the time. The silencer 1A according to the present embodiment has a main body 10A instead of the main body 10 (more specifically, a main body 11A instead of the main body 11), a rotating member 30A instead of the rotating member 30, and a fixed portion. The silencer 1 according to the first embodiment is different from the silencer 1 according to the first embodiment in that the fixed portion 20 </ b> A is used instead of the 20. The fixing portion 20A in the present embodiment includes a first fixing portion 20A1 and a second fixing portion 20A2. The silencer 1A according to the present embodiment rotates the first fixing portion 20A1 with respect to the second fixing portion 20A2, thereby reducing the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell. It is variable at a position in the middle of the shaft.

本体部１０Ａの胴部１１Ａは、小径側端１１Ａｂ近傍の胴部１１Ａの外壁に溝１３および１４に代えて溝１３Ａを有する点で第１実施形態による消音器１の胴部１１と異なる。   The trunk portion 11A of the main body portion 10A is different from the trunk portion 11 of the silencer 1 according to the first embodiment in that the outer wall of the trunk portion 11A in the vicinity of the small diameter end 11Ab has grooves 13A instead of the grooves 13 and 14.

溝１３Ａは、胴部１１Ａの軸の周りに亙る浅い溝である。また、溝１３Ａは、小径側端１１Ａｂから少し大径側端１１Ａａ方向に移動した位置における胴部１１Ａの外壁に設けられている。   The groove 13A is a shallow groove extending around the axis of the trunk portion 11A. Further, the groove 13A is provided on the outer wall of the trunk portion 11A at a position moved slightly in the direction of the large diameter side end 11Aa from the small diameter side end 11Ab.

回転部材３０Ａは、本体部１０Ａを内側に収容する筒状の部材である。また、回転部材３０Ａは、溝１３Ａに収容されるように配置されている。回転部材３０Ａの軸は胴部１１Ａの軸と重なっている。回転部材３０Ａは、溝１３Ａ内において胴部１１Ａの軸周りの方向に回転可能である。また、溝１３Ａと回転部材３０Ａとの間には、回転させた回転部材３０Ａの位置を保持する機構が設けられている（図示略）。また、回転部材３０Ａの厚さは溝１３Ａの深さと同程度である。   The rotating member 30A is a cylindrical member that accommodates the main body 10A inside. Further, the rotating member 30A is disposed so as to be accommodated in the groove 13A. The axis of the rotating member 30A overlaps with the axis of the trunk portion 11A. The rotating member 30A is rotatable in the direction around the axis of the trunk portion 11A in the groove 13A. Further, a mechanism for holding the position of the rotated rotating member 30A is provided between the groove 13A and the rotating member 30A (not shown). The thickness of the rotating member 30A is approximately the same as the depth of the groove 13A.

第１固定部２０Ａ１は、湾曲しているブロック状部材である。第１固定部２０Ａ１は、例えば、コルクや硬めのスポンジゴムなど、あまり伸縮せず、適度な硬度と摩擦性能を有する柔軟な素材により形成される。第１固定部２０Ａ１は、胴部１１Ａの軸周りの方向に複数個並べられている。具体的には、第１固定部２０Ａ１は、胴部１１Ａの軸周りの方向の９０度毎に各々配置されている。そして、第１固定部２０Ａ１は、その凸曲面が外側になるようにして回転部材３０Ａの外壁に固定されている。隣り合う第１固定部２０Ａ１同士は互いに接触していない。   The first fixing portion 20A1 is a curved block member. The first fixing portion 20A1 is formed of a flexible material that does not expand and contract so much, such as cork or hard sponge rubber, and has appropriate hardness and friction performance. A plurality of first fixing portions 20A1 are arranged in the direction around the axis of the trunk portion 11A. Specifically, the first fixing portion 20A1 is disposed every 90 degrees in the direction around the axis of the trunk portion 11A. And 1st fixing | fixed part 20A1 is being fixed to the outer wall of 30 A of rotation members so that the convex curved surface may become an outer side. Adjacent first fixing portions 20A1 are not in contact with each other.

第２固定部２０Ａ２は、第１固定部２０Ａ１と同様の形状をしており、同様な素材により形成されている。また、第２固定部２０Ａ２は、第１固定部２０Ａ１と同様に、胴部１１Ａの軸周りの方向に複数個並べられている。具体的には、第２固定部２０Ａ２は、胴部１１Ａの軸周りの方向の９０度毎に各々配置されており、その凸曲面が外側になるようにして胴部１１Ａの溝１３Ａと小径側端１１Ａｂとの間の胴部１１Ａの外壁に固定されている。また、隣り合う第２固定部２０Ａ２同士は互いに接触していない。なお、第１固定部２０Ａ１および第２固定部２０Ａ２は、胴部１１Ａの軸周りの方向の９０度毎に４個設けられているが、第１固定部２０Ａ１および第２固定部２０Ａ２の各々の数およびそれらの配置はこれに限られない。   The second fixing portion 20A2 has the same shape as the first fixing portion 20A1, and is formed of the same material. Further, a plurality of second fixing portions 20A2 are arranged in the direction around the axis of the trunk portion 11A, similarly to the first fixing portion 20A1. Specifically, the second fixing portion 20A2 is disposed at every 90 degrees in the direction around the axis of the trunk portion 11A, and the groove 13A and the small diameter side of the trunk portion 11A are arranged so that the convex curved surface is on the outside. It is fixed to the outer wall of the body 11A between the end 11Ab. Further, the adjacent second fixing portions 20A2 are not in contact with each other. Note that four first fixing portions 20A1 and second fixing portions 20A2 are provided every 90 degrees in the direction around the axis of the trunk portion 11A, but each of the first fixing portion 20A1 and the second fixing portion 20A2 is provided. The numbers and their arrangement are not limited to this.

第１固定部２０Ａ１と第２固定部２０Ａ２とは、互いに分離しており、かつ、胴部１１Ａの軸方向に互いに隣接している。より詳細には、第２固定部２０Ａ２における胴部１１Ａの大径側端１１Ａａ側の側面が、第１固定部２０Ａ１における胴部１１Ａの小径側端１１Ａｂ側の側面に当接している。また、第２固定部２０Ａ２における胴部１１Ａの大径側端１１Ａａ側の端部の胴部１１Ａの軸周りの方向の長さ（すなわち、第２固定部２０Ａ２の大径側端１１Ａａ側の端部における第２固定部２０Ａ２の幅）は、第１固定部２０Ａ１における胴部１１Ａの小径側端１１Ａｂ側の端部の胴部１１Ａの軸周りの方向の長さ（すなわち、第１固定部２０Ａ１の小径側端１１Ａｂ側の端部における第１固定部２０Ａ１の幅）と同程度になっている。また、第２固定部２０Ａ２における胴部１１Ａの軸から遠ざかる方向の長さ（第２固定部２０Ａ２の高さ）と、第１固定部２０Ａ１における胴部１１Ａの軸から遠ざかる方向の長さ（第１固定部２０Ａ１の高さ）は、同程度である。   The first fixing portion 20A1 and the second fixing portion 20A2 are separated from each other and are adjacent to each other in the axial direction of the trunk portion 11A. More specifically, the side surface on the large diameter end 11Aa side of the body portion 11A in the second fixing portion 20A2 is in contact with the side surface on the small diameter side end 11Ab side of the body portion 11A in the first fixing portion 20A1. Further, the length of the end portion of the body portion 11A on the large diameter side end 11Aa side in the second fixing portion 20A2 in the direction around the axis of the body portion 11A (that is, the end on the large diameter side end 11Aa side of the second fixing portion 20A2) The width of the second fixing portion 20A2 in the first portion 20A1 is the length in the direction around the axis of the trunk portion 11A of the end portion on the small diameter side end 11Ab of the trunk portion 11A in the first fixing portion 20A1 (that is, the first fixing portion 20A1). The width of the first fixed portion 20A1 at the end on the small diameter side end 11Ab side). Further, the length of the second fixing portion 20A2 away from the axis of the trunk portion 11A (the height of the second fixing portion 20A2) and the length of the first fixing portion 20A1 away from the axis of the trunk portion 11A (first The height of the first fixing portion 20A1 is about the same.

第１固定部２０Ａ１は、回転部材３０Ａに固定されているため、回転部材３０Ａの回転に伴い、胴部１１Ａの軸周りの方向に移動する。一方、第２固定部２０Ａ２は、胴部１１Ａに固定されているため、回転部材３０Ａを回転させても移動しない。このため、本実施形態による消音器１Ａは、各第２固定部２０Ａ２の位置（角度）に対して各第１固定部２０Ａ１の位置（角度）を胴部１１Ａの軸周りの回転方向にずらすことができる。これは、第１固定部２０Ａ１と第２固定部２０Ａ２とからなる固定部２０Ａにおける胴部１１Ａの軸周りの方向の長さを変えることと等価である。ユーザは、回転部材３０Ａを回転させて第２固定部２０Ａ２に対して第１固定部２０Ａ１をずらしてから消音器１Ａをトランペットに装着する。   Since the first fixing portion 20A1 is fixed to the rotating member 30A, the first fixing portion 20A1 moves in the direction around the axis of the trunk portion 11A as the rotating member 30A rotates. On the other hand, since the second fixing portion 20A2 is fixed to the trunk portion 11A, the second fixing portion 20A2 does not move even when the rotating member 30A is rotated. Therefore, the silencer 1A according to the present embodiment shifts the position (angle) of each first fixing portion 20A1 in the rotational direction around the axis of the trunk portion 11A with respect to the position (angle) of each second fixing portion 20A2. Can do. This is equivalent to changing the length in the direction around the axis of the trunk portion 11A in the fixing portion 20A composed of the first fixing portion 20A1 and the second fixing portion 20A2. The user rotates the rotating member 30A to displace the first fixing portion 20A1 with respect to the second fixing portion 20A2, and then attaches the silencer 1A to the trumpet.

消音器１Ａをトランペットに装着した場合、第１固定部２０Ａ１の外壁と第２固定部２０Ａ２の外壁の各々はベルの内壁に当接され、第１固定部２０Ａ１および第２固定部２０Ａ２は本体部１０Ａとベルとの間を閉塞させる。このとき、隣り合う第１固定部２０Ａ１と回転部材３０Ａとベルとにより隙間が形成され、かつ、隣り合う第２固定部２０Ａ２と本体部１０Ａとベルとにより隙間が形成される。消音器１Ａを装着して吹奏したときのベル内に生じる音は、第２固定部２０Ａ２により形成される隙間を通り、その後、第１固定部２０Ａ１により形成される隙間を通って消音器１Ａ外へ放音される。   When the silencer 1A is attached to the trumpet, the outer wall of the first fixing part 20A1 and the outer wall of the second fixing part 20A2 are in contact with the inner wall of the bell, and the first fixing part 20A1 and the second fixing part 20A2 are the main body part. Block between 10A and the bell. At this time, a gap is formed by the adjacent first fixing portion 20A1, the rotating member 30A, and the bell, and a gap is formed by the adjacent second fixing portion 20A2, the main body portion 10A, and the bell. The sound generated in the bell when the silencer 1A is mounted and played is passed through the gap formed by the second fixing portion 20A2, and then passes through the gap formed by the first fixing portion 20A1 and outside the silencer 1A. Sound is emitted.

図４（Ａ）および（Ｂ）は、後方から消音器１Ａを見たとき、第１固定部２０Ａ１の位置（角度）と第２固定部２０Ａ２の位置（角度）とが重なっている状態を示している。このとき、第２固定部２０Ａ２における胴部１１Ａの軸周りの方向の側面は、第１固定部２０Ａ１における胴部１１Ａの軸周りの方向の側面に連続している。この状態の消音器１Ａをトランペットに装着して後方から消音器１Ａを見た場合、第１固定部２０Ａ１と回転部材３０Ａとベルとにより形成される隙間と、第２固定部２０Ａ２と胴部１１Ａとベルとにより形成される隙間とが重なる。この場合、第２固定部２０Ａ２により形成される隙間と第１固定部２０Ａ１により形成される隙間との境界において、第２固定部２０Ａ２により形成される隙間から第１固定部２０Ａ１により形成される隙間へ進んでもそれらの隙間の断面積は変わらない。すなわち、放音される音が通過する隙間の断面積は、固定部２０Ａにおける胴部１１Ａの軸方向の途中の位置において小さくならない。従って、この隙間を通過する音が少なくならないため、大きな音量の音が消音器１Ａ外に放音される。換言すると、この場合、消音器１Ａの弱音の度合いは小さくなる。   4A and 4B show a state in which the position (angle) of the first fixing portion 20A1 and the position (angle) of the second fixing portion 20A2 overlap when the silencer 1A is viewed from the rear. ing. At this time, the side surface of the second fixed portion 20A2 in the direction around the axis of the trunk portion 11A is continuous with the side surface of the first fixed portion 20A1 in the direction around the axis of the trunk portion 11A. When the silencer 1A in this state is attached to the trumpet and the silencer 1A is viewed from the rear, the gap formed by the first fixing portion 20A1, the rotating member 30A, and the bell, the second fixing portion 20A2, and the trunk portion 11A. And the gap formed by the bell overlap. In this case, at the boundary between the gap formed by the second fixing portion 20A2 and the gap formed by the first fixing portion 20A1, the gap formed by the first fixing portion 20A1 from the gap formed by the second fixing portion 20A2. The cross-sectional area of these gaps does not change even if you proceed to. That is, the cross-sectional area of the gap through which the sound to be emitted passes does not become small at a position in the axial direction of the trunk portion 11A in the fixed portion 20A. Therefore, since the sound passing through the gap is not reduced, a loud sound is emitted outside the silencer 1A. In other words, in this case, the level of the weak sound of the silencer 1A is reduced.

一方、図４（Ｃ）および（Ｄ）は、後方から消音器１Ａを見たとき、第２固定部２０Ａ２の位置（角度）に対して第１固定部２０Ａ１の位置（角度）が、反時計回り方向にずれている状態を示している。このとき、第２固定部２０Ａ２における胴部１１Ａの軸周りの方向の側面は、第１固定部２０Ａ１における胴部１１Ａの軸周りの方向の側面に連続していない。この状態の消音器１Ａをトランペットに装着して後方から消音器１Ａを見た場合、第２固定部２０Ａ２と胴部１１Ａとベルとにより形成される隙間の位置に対して第１固定部２０Ａ１と回転部材３０Ａとベルとにより形成される隙間の位置が、胴部１１Ａの軸周りの回転方向（図４（Ｃ）および（Ｄ）の場合は反時計回り方向）にずれる。この場合、第２固定部２０Ａ２により形成される隙間を通って第１固定部２０Ａ１により形成される隙間に入る音の一部は、第２固定部２０Ａ２と第１固定部２０Ａ１との境界において、第１固定部２０Ａ１における胴部１１Ａの小径側端１１Ａｂ側の側面に当たる。すなわち、第２固定部２０Ａ２と第１固定部２０Ａ１との境界において、消音器１Ａ外に放音される音が通過する領域は、第２固定部２０Ａ２と第１固定部２０Ａ１と胴部１１Ａ（または回転部材３０Ａ）とベルとにより形成される隙間となる。この部分の隙間の断面積は、第１固定部２０Ａ１により形成される隙間の断面積または第２固定部２０Ａ２により形成される隙間の断面積よりも小さくなる。すなわち、放音される音が通過する隙間の断面積は、固定部２０Ａにおける胴部１１Ａの軸方向の途中の位置において小さくなる。従って、この隙間を通過する音が少なくなるため、小さな音量の音が消音器１Ａ外に放音されることになる。換言すると、この場合、消音器１Ａの弱音の度合いは大きくなる。   On the other hand, in FIGS. 4C and 4D, when the silencer 1A is viewed from the rear, the position (angle) of the first fixing portion 20A1 is counterclockwise with respect to the position (angle) of the second fixing portion 20A2. The state which has shifted | deviated to the rotation direction is shown. At this time, the side surface of the second fixing portion 20A2 in the direction around the axis of the trunk portion 11A is not continuous with the side surface of the first fixing portion 20A1 in the direction around the axis of the trunk portion 11A. When the silencer 1A in this state is attached to the trumpet and the silencer 1A is viewed from the rear, the first fixing portion 20A1 and the position of the gap formed by the second fixing portion 20A2, the trunk portion 11A, and the bell The position of the gap formed by the rotating member 30A and the bell is shifted in the rotational direction around the axis of the trunk portion 11A (the counterclockwise direction in the case of FIGS. 4C and 4D). In this case, part of the sound that enters the gap formed by the first fixing portion 20A1 through the gap formed by the second fixing portion 20A2 is at the boundary between the second fixing portion 20A2 and the first fixing portion 20A1. It corresponds to the side surface on the small diameter side end 11Ab side of the body portion 11A in the first fixing portion 20A1. That is, at the boundary between the second fixing portion 20A2 and the first fixing portion 20A1, the region through which the sound emitted outside the silencer 1A passes is the second fixing portion 20A2, the first fixing portion 20A1, and the trunk portion 11A ( Alternatively, a gap is formed by the rotating member 30A) and the bell. The cross-sectional area of the gap in this portion is smaller than the cross-sectional area of the gap formed by the first fixing portion 20A1 or the cross-sectional area of the gap formed by the second fixing portion 20A2. That is, the cross-sectional area of the gap through which the sound to be emitted passes is reduced at a position in the axial direction of the trunk portion 11A in the fixed portion 20A. Therefore, since the sound passing through this gap is reduced, a sound with a small volume is emitted outside the silencer 1A. In other words, in this case, the degree of weak sound of the silencer 1A increases.

第２固定部２０Ａ２に対して第１固定部２０Ａ１を胴部１１Ａの軸周りの方向にずらす度合いを大きくするに従って、第２固定部２０Ａ２と第１固定部２０Ａ１との境界における第２固定部２０Ａ２と第１固定部２０Ａ１と胴部１１Ａ（または回転部材３０Ａ）とベルとにより形成される隙間の断面積が小さくなり、消音器１Ａ外に放音される音量が小さくなり、消音器１Ａの弱音の度合いが大きくなる。また、第２固定部２０Ａ２に対して第１固定部２０Ａ１を胴部１１Ａの軸周りの方向にずらす度合いを小さくするに従って、同隙間の断面積が大きくなり、消音器１Ａ外に放音される音量が大きくなり、消音器１Ａの弱音の度合いが小さくなる。   The second fixing portion 20A2 at the boundary between the second fixing portion 20A2 and the first fixing portion 20A1 is increased as the degree of shifting the first fixing portion 20A1 in the direction around the axis of the trunk portion 11A with respect to the second fixing portion 20A2 is increased. The sectional area of the gap formed by the first fixing portion 20A1, the body portion 11A (or the rotating member 30A) and the bell is reduced, the sound volume emitted to the outside of the silencer 1A is reduced, and the sound of the silencer 1A is reduced. The degree of increases. Further, as the degree of shifting the first fixing portion 20A1 in the direction around the axis of the trunk portion 11A with respect to the second fixing portion 20A2 is reduced, the cross-sectional area of the gap increases and sound is emitted outside the silencer 1A. The volume increases and the degree of weak sound of the silencer 1A decreases.

このように、回転部材３０を回転させることにより、第２固定部２０Ａ２に対して第１固定部２０Ａ１が回転方向にずれるため、ベル内の空間とベル外の空間とを連通させる隙間の断面積を変化させることができる。すなわち、回転部材３０は、その隙間の断面積を変える断面積可変手段である。   Thus, since the first fixing portion 20A1 is displaced in the rotation direction with respect to the second fixing portion 20A2 by rotating the rotating member 30, the sectional area of the gap that communicates the space inside the bell and the space outside the bell. Can be changed. That is, the rotating member 30 is a cross-sectional area variable means for changing the cross-sectional area of the gap.

従って、本実施形態においても、第１実施形態と同様の効果を奏する。   Therefore, the present embodiment has the same effect as the first embodiment.

なお、第１固定部２０Ａ１と第２固定部２０Ａ２とにより胴部１１Ａの軸の周りに亙って完全に本体部１０Ａとベルとの間を閉塞しないように、回転部材３０Ａの回転可能範囲を制限する機構を設けても良い。   Note that the rotatable range of the rotating member 30A is set so that the first fixing portion 20A1 and the second fixing portion 20A2 do not completely close the space between the main body portion 10A and the bell around the axis of the trunk portion 11A. A limiting mechanism may be provided.

また、第１固定部２０Ａ１の位置を第２固定部２０Ａ２の位置に対して後方から消音器１Ａを見たときにおける反時計回り方向にずらした場合について例示したが、第１固定部２０Ａ１の位置を第２固定部２０Ａ２の位置に対して後方から消音器１Ａを見たときにおける時計回り方向にずらすようにしても勿論良い。   Moreover, although illustrated about the case where the position of 1st fixing | fixed part 20A1 was shifted in the counterclockwise direction when the silencer 1A was seen from back with respect to the position of 2nd fixing | fixed part 20A2, the position of 1st fixing | fixed part 20A1 is shown. Of course, it is possible to shift the position of the second fixing portion 20A2 in the clockwise direction when the silencer 1A is viewed from the rear.

＜第３実施形態＞
図５（Ａ）および（Ｃ）は、この発明の第３実施形態による消音器１Ｂの構成を示す側面図であり、図５（Ｂ）および（Ｄ）は、後方から同消音器１Ｂを見たときの同消音器１Ｂの構成を示す背面図である。本実施形態による消音器１Ｂは、本体部１０に代えて本体部１０Ｂとし（より具体的には、胴部１１に代えて胴部１１Ｂとし）、回転部材３０および固定部２０に代えて固定部２０Ｂを設けた点において第１実施形態による消音器１と異なる。本実施形態による消音器１Ｂは、胴部１１Ｂの外壁に沿って胴部１１Ｂの前後方向に固定部２０Ｂを移動可能にしたものである。 <Third Embodiment>
5 (A) and 5 (C) are side views showing the configuration of the silencer 1B according to the third embodiment of the present invention. FIGS. 5 (B) and 5 (D) show the silencer 1B from the rear. It is a rear view which shows the structure of the silencer 1B at the time. The silencer 1B according to the present embodiment has a main body 10B instead of the main body 10 (more specifically, a main body 11B instead of the main body 11), and a fixed portion instead of the rotating member 30 and the fixed portion 20. It differs from the silencer 1 according to the first embodiment in that 20B is provided. The silencer 1B according to the present embodiment is configured such that the fixed portion 20B is movable in the front-rear direction of the trunk portion 11B along the outer wall of the trunk portion 11B.

本体部１０Ｂの胴部１１Ｂは、第１実施形態による本体部１０の胴部１１と同様にして、前端から後端に向かって外径が縮径されている。胴部１１Ｂは、小径側端１１Ｂｂに溝１３および１４を有していない点で第１実施形態による消音器１の胴部１１と異なる。   The outer diameter of the trunk portion 11B of the main body portion 10B is reduced from the front end toward the rear end in the same manner as the trunk portion 11 of the main body portion 10 according to the first embodiment. The trunk | drum 11B differs from the trunk | drum 11 of the silencer 1 by 1st Embodiment by the point which does not have the grooves 13 and 14 in the small diameter side end 11Bb.

固定部２０Ｂは、固定部本体２０Ｂａと伸縮部材２０Ｂｂとから構成されている。伸縮部材２０Ｂｂは、薄肉の筒状をなしている。伸縮部材２０Ｂｂは、例えば、ゴムなどの伸縮性を有する柔軟な素材により形成される。伸縮部材２０Ｂｂの軸方向の長さは、胴部１１Ｂの軸方向の長さよりも短くなっている。また、伸縮部材２０Ｂｂの内径は、胴部１１Ｂの外径よりも小さくなっている。   The fixing portion 20B is composed of a fixing portion main body 20Ba and an elastic member 20Bb. The elastic member 20Bb has a thin cylindrical shape. The elastic member 20Bb is formed of a flexible material having elasticity such as rubber, for example. The length of the elastic member 20Bb in the axial direction is shorter than the length of the trunk portion 11B in the axial direction. Further, the inner diameter of the elastic member 20Bb is smaller than the outer diameter of the body portion 11B.

固定部２０Ｂの固定部本体２０Ｂａは、湾曲したブロック状部材である。固定部本体２０Ｂａは、コルクや硬めのスポンジゴムなど、あまり伸縮せず、適度な硬度と摩擦性能を有する柔軟な素材により形成される。固定部本体２０Ｂａは、伸縮部材２０Ｂｂの軸周りの方向の１２０度毎に各々配置されている。すなわち、固定部本体２０Ｂａは、本体部１０Ｂの軸周りの方向に並べられている。そして、固定部本体２０Ｂａは、その凸曲面が外側になるようにして伸縮部材２０Ｂｂの外壁に固定されている。すなわち、各固定部本体２０Ｂａ間に伸縮部材２０Ｂｂが設けられており、伸縮部材２０Ｂｂは、各固定部本体２０Ｂａを環状に連結している。また、隣り合う固定部本体２０Ｂａ同士は互いに接触していない。また、固定部本体２０Ｂａにおける伸縮部材２０Ｂｂの軸方向の長さは、伸縮部材２０Ｂｂにおける伸縮部材２０Ｂｂの軸方向の長さと同程度である。なお、固定部本体２０Ｂａは、伸縮部材２０Ｂｂの軸周りの方向の１２０度毎に３個設けられているが、固定部本体２０Ｂａの数および配置はこれに限られない。   The fixing portion main body 20Ba of the fixing portion 20B is a curved block-shaped member. The fixing portion main body 20Ba is formed of a flexible material such as cork or hard sponge rubber that does not expand and contract so much and has appropriate hardness and friction performance. The fixing portion main body 20Ba is disposed every 120 degrees in the direction around the axis of the elastic member 20Bb. That is, the fixing portion main body 20Ba is arranged in the direction around the axis of the main body portion 10B. The fixing portion main body 20Ba is fixed to the outer wall of the elastic member 20Bb so that the convex curved surface is on the outside. That is, the expansion / contraction member 20Bb is provided between the respective fixing portion main bodies 20Ba, and the expansion / contraction member 20Bb connects the respective fixing portion main bodies 20Ba in an annular shape. Moreover, adjacent fixing | fixed part main body 20Ba is not mutually contacting. In addition, the length in the axial direction of the expansion / contraction member 20Bb in the fixing portion main body 20Ba is approximately the same as the length in the axial direction of the expansion / contraction member 20Bb in the expansion / contraction member 20Bb. In addition, although three fixing | fixed part main body 20Ba is provided for every 120 degree | times of the surroundings direction of the expansion-contraction member 20Bb, the number and arrangement | positioning of fixing | fixed part main body 20Ba are not restricted to this.

固定部本体２０Ｂａはあまり伸縮しない素材により形成されているため、伸縮部材２０Ｂｂにおいて固定部本体２０Ｂａが固定されている部分はあまり伸縮しない。一方、伸縮部材２０Ｂｂにおける固定部本体２０Ｂａが固定されていない部分は、伸縮部材２０Ｂｂの軸周りの方向に伸縮可能である。このため、伸縮部材２０Ｂｂは、その内径を自在に変えることができる。   Since the fixing portion main body 20Ba is formed of a material that does not expand and contract too much, the portion of the expansion and contraction member 20Bb to which the fixing portion main body 20Ba is fixed does not expand or contract very much. On the other hand, the portion of the expansion / contraction member 20Bb where the fixing portion main body 20Ba is not fixed can expand and contract in the direction around the axis of the expansion / contraction member 20Bb. For this reason, the elastic member 20Bb can freely change its inner diameter.

本実施形態による消音器１Ｂの固定部２０Ｂは、本体部１０Ｂから分離している。そのため、固定部２０Ｂは、本体部１０Ｂに取り付けられる。より詳細に説明すると、伸縮部材２０Ｂｂ内には、胴部１１Ｂが小径側端１１Ｂｂ側から挿入される。このとき、伸縮部材２０Ｂｂにおける固定部本体２０Ｂａが固定されていない部分が伸縮部材２０Ｂｂの軸周りの方向に伸びて、伸縮部材２０Ｂｂ内に胴部１１Ｂが挿入される。そして、この伸びた部分に生じる伸縮部材２０Ｂｂの軸周りの方向に縮もうとする力により、伸縮部材２０Ｂｂは、胴部１１Ｂを外側から締め付ける。これにより、固定部２０Ｂ（換言すると、固定部本体２０Ｂａ）は、胴部１１Ｂの外壁上に保持される。なお、伸縮部材２０Ｂｂの内壁に細かい凹凸を形成する等により伸縮部材２０Ｂｂの内壁と胴部１１Ｂの外壁との間の摩擦を大きくし、より確実に固定部２０Ｂが胴部１１Ｂの外壁上に保持されるようにしても良い。   The fixing part 20B of the silencer 1B according to the present embodiment is separated from the main body part 10B. Therefore, the fixing portion 20B is attached to the main body portion 10B. More specifically, the trunk portion 11B is inserted into the elastic member 20Bb from the small diameter end 11Bb side. At this time, a portion of the expansion / contraction member 20Bb where the fixing portion main body 20Ba is not fixed extends in the direction around the axis of the expansion / contraction member 20Bb, and the trunk portion 11B is inserted into the expansion / contraction member 20Bb. The elastic member 20Bb tightens the body portion 11B from the outside by a force that is generated in the extended portion and tends to shrink in the direction around the axis of the elastic member 20Bb. Thereby, the fixing portion 20B (in other words, the fixing portion main body 20Ba) is held on the outer wall of the trunk portion 11B. In addition, the friction between the inner wall of the elastic member 20Bb and the outer wall of the trunk portion 11B is increased by forming fine irregularities on the inner wall of the elastic member 20Bb, and the fixing portion 20B is more securely held on the outer wall of the trunk portion 11B. You may be made to do.

また、伸縮部材２０Ｂｂは、本体部１０Ｂと分離しておりその内径を変えることができるため、固定部２０Ｂ（換言すると、固定部本体２０Ｂａ）は、胴部１１Ｂの外壁に沿って胴部１１Ｂの軸方向に移動可能である。そして、固定部２０Ｂは、胴部１１Ｂの外壁上における胴部１１Ｂの軸方向の各位置に保持され得る。ユーザは、固定部２０Ｂを胴部１１Ｂの軸方向に移動させて、その固定部２０Ｂを胴部１１Ｂの外壁上における胴部１１Ｂの軸方向の所望の位置に取り付けてから消音器１Ｂをトランペットに装着する。   Further, since the elastic member 20Bb is separated from the main body portion 10B and can change the inner diameter thereof, the fixing portion 20B (in other words, the fixing portion main body 20Ba) is arranged along the outer wall of the trunk portion 11B. It can move in the axial direction. And the fixing | fixed part 20B can be hold | maintained in each position of the axial direction of the trunk | drum 11B on the outer wall of the trunk | drum 11B. The user moves the fixed portion 20B in the axial direction of the trunk portion 11B, attaches the fixed portion 20B to a desired position in the axial direction of the trunk portion 11B on the outer wall of the trunk portion 11B, and then uses the silencer 1B as a trumpet. Installing.

消音器１Ｂをトランペットに装着した場合、固定部本体２０Ｂａの外壁はベルの内壁に当接し、固定部本体２０Ｂａは本体１０Ｂとベルとの間を閉塞させる。このとき、隣り合う固定部本体２０Ｂａと伸縮部２０Ｂｂとベルとにより隙間が形成される。消音器１Ｂを装着して吹奏したときにベル内に生じる音は、この隙間を介して消音器１Ｂ外に放音される。   When the silencer 1B is attached to the trumpet, the outer wall of the fixing portion main body 20Ba abuts on the inner wall of the bell, and the fixing portion main body 20Ba closes the space between the main body 10B and the bell. At this time, a gap is formed by the adjacent fixing portion main body 20Ba, the expansion / contraction portion 20Bb, and the bell. The sound generated in the bell when the silencer 1B is mounted and played is emitted to the outside of the silencer 1B through this gap.

ここで、図５（Ａ）および（Ｂ）に示すように、固定部２０Ｂを小径側端１１Ｂｂ近傍に取り付けた場合、胴部１１Ｂの外径が小さいため、伸縮部材２０Ｂｂにおける固定部本体２０Ｂａが固定されていない部分の伸び量は少なくなる。この場合、各固定部本体２０Ｂａの間隔は狭くなる。このため、この状態の消音器１Ｂをトランペットに装着した場合、隣り合う固定部本体２０Ｂａと伸縮部材２０Ｂｂとベルとにより形成される隙間の断面積は小さくなる。従って、この隙間を通過する音が少なくなるため、小さな音量の音が消音器１Ｂ外に放音されることになる。換言すると、この場合、消音器１Ｂの弱音の度合いは大きくなる。   Here, as shown in FIGS. 5A and 5B, when the fixing portion 20B is attached in the vicinity of the small-diameter side end 11Bb, since the outer diameter of the body portion 11B is small, the fixing portion main body 20Ba in the elastic member 20Bb is The amount of elongation of the unfixed portion is reduced. In this case, the interval between the fixing portion main bodies 20Ba is narrowed. For this reason, when the silencer 1B in this state is attached to the trumpet, the cross-sectional area of the gap formed by the adjacent fixing portion main body 20Ba, the elastic member 20Bb, and the bell is reduced. Accordingly, since the sound passing through this gap is reduced, a sound with a small volume is emitted outside the silencer 1B. In other words, in this case, the level of the weak sound of the silencer 1B increases.

一方、図５（Ｃ）および（Ｄ）に示すように、固定部２０Ｂを胴部１１Ｂの中央付近に取り付けた場合、中央近傍における胴部１１Ｂの外径が小径側端１１Ｂｂにおける胴部１１Ｂの外径よりも大きいため、伸縮部材２０Ｂｂにおける固定部本体２０Ｂａが固定されていない部分の伸び量は、固定部２０Ｂを小径側端１１Ｂｂ近傍に取り付けた場合における同部分の伸び量よりも大きくなる。この場合、各固定部本体２０Ｂａの間隔は広くなる。このため、この状態の消音器１Ｂをトランペットに装着した場合、隣り合う固定部本体２０Ｂａと伸縮部材２０Ｂｂとベルとにより形成される隙間の断面積は大きくなる。従って、この隙間を通過する音が多くなるため、大きな音量の音が消音器１Ｂ外に放音されることになる。換言すると、この場合、消音器１Ｂの弱音の度合いは小さくなる。   On the other hand, as shown in FIGS. 5C and 5D, when the fixing portion 20B is attached near the center of the trunk portion 11B, the outer diameter of the trunk portion 11B near the center is smaller than that of the trunk portion 11B at the small-diameter side end 11Bb. Since it is larger than the outer diameter, the extension amount of the expansion member 20Bb where the fixing portion main body 20Ba is not fixed is larger than the extension amount of the same portion when the fixing portion 20B is attached in the vicinity of the small diameter end 11Bb. In this case, the interval between the fixing portion main bodies 20Ba is increased. For this reason, when the silencer 1B in this state is attached to the trumpet, the cross-sectional area of the gap formed by the adjacent fixing portion main body 20Ba, the expansion / contraction member 20Bb, and the bell increases. Accordingly, since the sound passing through this gap increases, a sound with a large volume is emitted outside the silencer 1B. In other words, in this case, the degree of weak sound of the silencer 1B is reduced.

固定部２０Ｂを取り付ける位置を胴部１１Ｂの小径側端１１Ｂｂに近づけるに従って、消音器１Ｂを装着したときにおける隣り合う固定部本体２０Ｂａと伸縮部材２０Ｂｂとベルとの間の隙間の断面積が小さくなり、消音器１Ｂ外に放音される音量が小さくなり、消音器１Ｂの弱音の度合いが大きくなる。また、固定部２０Ｂを取り付ける位置を胴部１１Ｂの大径側端１１Ｂａに近づけるに従って、同隙間の断面積が大きくなり、消音器１Ｂ外に放音される音量が大きくなり、消音器１Ｂの弱音の度合いが小さくなる。   As the position where the fixing portion 20B is attached is closer to the small-diameter side end 11Bb of the body portion 11B, the cross-sectional area of the gap between the adjacent fixing portion main body 20Ba, the elastic member 20Bb, and the bell when the silencer 1B is mounted decreases. The sound volume emitted to the outside of the silencer 1B decreases, and the degree of weak sound of the silencer 1B increases. Further, as the position where the fixing portion 20B is attached is brought closer to the large-diameter side end 11Ba of the trunk portion 11B, the cross-sectional area of the gap increases, the volume of sound emitted to the outside of the silencer 1B increases, and the silence of the silencer 1B. The degree of is reduced.

このように、伸縮部材２０Ｂｂに固定されている固定部本体２０Ｂａを胴部１１Ｂの外壁に沿って胴部１１Ｂの軸方向に移動させることにより、伸縮部材２０Ｂｂが胴部１１Ｂの軸周りの方向に伸縮して、ベル内の空間とベル外の空間とを連通させる隙間の断面積を変化させることができる。すなわち、伸縮部材２０Ｂｂは、その隙間の断面積を変える断面積可変手段である。   Thus, by moving the fixing portion main body 20Ba fixed to the expansion / contraction member 20Bb along the outer wall of the trunk portion 11B in the axial direction of the trunk portion 11B, the expansion / contraction member 20Bb moves in the direction around the axis of the trunk portion 11B. By expanding and contracting, the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell can be changed. That is, the expansion member 20Bb is a cross-sectional area variable means that changes the cross-sectional area of the gap.

従って、本実施形態においても、第１実施形態と同様の効果を奏する。   Therefore, the present embodiment has the same effect as the first embodiment.

なお、固定部２０Ｂの位置を胴部１１Ｂの軸方向に移動させたとしても、消音器１Ｂを装着したときにおけるベルの位置に対する本体部１０Ｂの位置は変わらない。胴部１１Ｂの外径が大径側端１１Ｂａから小径側端１１Ｂｂに向かってベルの内壁に沿って小さくなっているからである。   Even if the position of the fixed portion 20B is moved in the axial direction of the trunk portion 11B, the position of the main body portion 10B relative to the position of the bell when the silencer 1B is mounted does not change. This is because the outer diameter of the trunk portion 11B decreases along the inner wall of the bell from the large diameter end 11Ba toward the small diameter end 11Bb.

＜第４実施形態＞
図６（Ａ）は、この発明の第４実施形態による消音器１Ｃの本体部１０Ｃの構成を示す側面図であり、図６（Ｂ）〜（Ｄ）は、同消音器１Ｃの本体部１０Ｃに固定部２０Ｃを取り付けたときの背面図であり、図６（Ｅ）〜（Ｇ）は、本体部１０Ｃに取り付ける固定部２０Ｃの構成を示す上面図である。本実施形態による消音器１Ｃは、本体部１０に代えて本体部１０Ｃとし（より具体的には胴部１１に代えて胴部１１Ｃとし）、回転部材３０および固定部２０に代えて固定部２０Ｃとした点において第１実施形態による消音器１と異なる。本実施形態による消音器１Ｃは、本体部１０Ｃに対して固定部２０Ｃを着脱可能とし、複数種類用意された固定部２０Ｃの中から本体部１０Ｃに取り付ける固定部２０Ｃをユーザが選択して、固定部２０Ｃをユーザが付け換えるようにしたものである。 <Fourth embodiment>
FIG. 6A is a side view showing the configuration of the main body portion 10C of the silencer 1C according to the fourth embodiment of the present invention, and FIGS. 6B to 6D show the main body portion 10C of the silencer 1C. FIG. 6E to FIG. 6G are top views showing the configuration of the fixing portion 20C attached to the main body portion 10C. The silencer 1C according to the present embodiment has a main body 10C instead of the main body 10 (more specifically, a main body 11C instead of the main body 11), and a fixed portion 20C instead of the rotating member 30 and the fixed portion 20. The difference from the silencer 1 according to the first embodiment is that. In the silencer 1C according to the present embodiment, the fixing portion 20C can be attached to and detached from the main body portion 10C, and the user selects and fixes the fixing portion 20C to be attached to the main body portion 10C from a plurality of types of fixing portions 20C. The part 20C is changed by the user.

本体部１０Ｃの胴部１１Ｃは、溝１３および１４に代えて結合部４０Ｃを有する点において第１実施形態による消音器１の胴部１１と異なる。   The trunk portion 11C of the main body portion 10C is different from the trunk portion 11 of the silencer 1 according to the first embodiment in that the coupling portion 40C is provided instead of the grooves 13 and 14.

結合部４０Ｃは、小径側端１１Ｃｂ近傍の胴部１１Ｃの外壁に設けられている。この結合部４０Ｃは、胴部１１Ｃの軸の周りに亙って設けられている。結合部４０Ｃは、例えば、面ファスナーの一方である。より具体的には、フック側部材とループ側部材とからなる面ファスナーを用いた場合、ループ側部材を結合部４０Ｃとして用いれば良い。そのループ側部材は、ループが設けられている面が外側になるように胴部１１Ｃの外壁に固定される。   The coupling portion 40C is provided on the outer wall of the trunk portion 11C in the vicinity of the small diameter side end 11Cb. The coupling portion 40C is provided around the axis of the trunk portion 11C. The coupling portion 40C is, for example, one of hook-and-loop fasteners. More specifically, when a hook-and-loop fastener composed of a hook-side member and a loop-side member is used, the loop-side member may be used as the coupling portion 40C. The loop side member is fixed to the outer wall of the trunk portion 11C so that the surface on which the loop is provided is on the outside.

固定部２０Ｃは、本体部１０Ｃから分離している。固定部２０Ｃは、固定部本体２０Ｃａとベース２０Ｃｂとから構成されている。ベース２０Ｃｂは、扇状をなしている。ベース２０Ｃｂは、例えば、布などの柔軟であまり伸縮しない素材により形成される。ベース２０Ｃｂの下面には、胴部１１Ｃに設けられている結合部４０Ｃに対応する結合部が設けられている（図示略）。このベース２０Ｃｂに設けられている結合部は、例えば、面ファスナーの他方である。より具体的には、胴部１１Ｃの結合部４０Ｃにループ側部材を用いた場合、そのループ側部材に対応するフック側部材をベース２０Ｃｂの結合部として用いれば良い。そのフック側部材は、フックが設けられている面が外側になるようにベース２０Ｃｂの下面に固定される。   The fixing portion 20C is separated from the main body portion 10C. The fixed portion 20C is composed of a fixed portion main body 20Ca and a base 20Cb. The base 20Cb has a fan shape. The base 20Cb is formed of a material that is flexible and does not stretch much, such as cloth. On the lower surface of the base 20Cb, a coupling portion (not shown) corresponding to the coupling portion 40C provided in the trunk portion 11C is provided. The coupling portion provided on the base 20Cb is, for example, the other of the hook-and-loop fastener. More specifically, when a loop side member is used for the coupling portion 40C of the body portion 11C, a hook side member corresponding to the loop side member may be used as the coupling portion of the base 20Cb. The hook side member is fixed to the lower surface of the base 20Cb so that the surface on which the hook is provided is on the outside.

本実施形態による消音器１Ｃでは、ベース２０Ｃｂの結合部を胴部１１Ｃの結合部４０Ｃに結合させることにより、固定部２０Ｃを本体１０Ｃに取り付けることができるとともに、ベース２０Ｃｂの結合部を胴部１１Ｃの結合部４０Ｃから引き剥がすことにより、固定部２０Ｃを本体部１０Ｃから取り外すことができる。このとき、固定部２０Ｃは、ベース２０Ｃｂにおける短い円弧部分が胴部１１Ｃの小径側端１１Ｃｂに重なるように、本体部１０Ｃに取り付けられる。   In the silencer 1C according to the present embodiment, the coupling portion of the base 20Cb is coupled to the coupling portion 40C of the trunk portion 11C, whereby the fixing portion 20C can be attached to the main body 10C, and the coupling portion of the base 20Cb is coupled to the trunk portion 11C. The fixing portion 20C can be detached from the main body portion 10C by peeling off the connecting portion 40C. At this time, the fixing portion 20C is attached to the main body portion 10C so that the short arc portion of the base 20Cb overlaps the small diameter side end 11Cb of the trunk portion 11C.

ベース２０Ｃｂの上面には複数の固定部本体２０Ｃａが設けられている。すなわち、ベース２０Ｃｂは、固定部本体２０Ｃａの各々を連結している。固定部本体２０Ｃａは、湾曲しているブロック状部材である。固定部本体２０Ｃａは、例えば、コルクやスポンジゴムなどの適度な高度と摩擦性を有する素材から構成されている。固定部本体２０Ｃａは、固定部２０Ｃを本体部１０Ｃに取り付けたときに、固定部本体２０Ｃが胴部１１Ｃの外壁に沿うように湾曲しており、凸曲面が外側になるようにベース２０Ｃｂに固定されている。また、固定部本体２０Ｃａは、固定部２０Ｃを本体部１０Ｃに取り付けたときに、各固定部本体２０Ｃａが胴部１１Ｃの軸周りの方向に並べられるようにベース２０Ｃｂに固定されている。例えば、各固定部本体２０Ｃａは、胴部１１Ｃの軸周りの方向の１２０度毎に配置されている。   A plurality of fixing portion main bodies 20Ca are provided on the upper surface of the base 20Cb. That is, the base 20Cb connects each of the fixed portion main bodies 20Ca. The fixing part main body 20Ca is a curved block-shaped member. The fixing portion main body 20Ca is made of a material having an appropriate height and friction such as cork and sponge rubber. The fixing portion main body 20Ca is fixed to the base 20Cb so that the fixing portion main body 20C is curved along the outer wall of the trunk portion 11C when the fixing portion 20C is attached to the main body portion 10C, and the convex curved surface is on the outside. Has been. Further, the fixing portion main body 20Ca is fixed to the base 20Cb so that when the fixing portion 20C is attached to the main body portion 10C, the fixing portion main bodies 20Ca are arranged in the direction around the axis of the trunk portion 11C. For example, each fixing portion main body 20Ca is disposed every 120 degrees in the direction around the axis of the trunk portion 11C.

本実施形態による消音器１Ｃでは、各固定部本体２０Ｃａの間隔が異なる複数種の固定部２０Ｃが用意されている。換言すると、固定部本体２０Ｃａにおけるベース２０Ｃｂの円弧方向の長さ（すなわち、固定部本体２０Ｃａの幅）が異なる複数の固定部２０Ｃが用意されている。図６（Ｅ）は、各固定部本体２０Ｃａの間隔が広い固定部２０Ｃを示しており、図６（Ｇ）は、各固定部本体２０Ｃａの間隔が狭い固定部２０Ｃを示しており、図６（Ｆ）は、各固定部本体２０Ｃａの間隔が図６（Ｅ）の同間隔よりも狭く図６（Ｇ）の同間隔よりも広い中程度の固定部２０Ｃを示している。本実施形態による消音器１Ｃでは、これら複数用意された固定部２０Ｃの中から所望の音量を得ることができる固定部２０Ｃをユーザが選択して本体部１０Ｃに取り付けることになっている。図６（Ｂ）は、図６（Ｅ）に示す固定部２０Ｃを本体部１０Ｃに取り付けた場合を示し、図６（Ｃ）は、図６（Ｆ）に示す固定部２０Ｃを本体部１０Ｃに取り付けた場合を示し、図６（Ｄ）は、図６（Ｇ）に示す固定部２０Ｃを本体部１０Ｃに取り付けた場合を示す。そして、ユーザは、固定部２０Ｃを本体部１０Ｃに取り付けた状態で消音器１Ｃをトランペットに装着する。   In the silencer 1C according to the present embodiment, a plurality of types of fixing portions 20C having different intervals between the fixing portion main bodies 20Ca are prepared. In other words, a plurality of fixing portions 20C having different lengths in the arc direction of the base 20Cb in the fixing portion main body 20Ca (that is, the width of the fixing portion main body 20Ca) are prepared. 6 (E) shows a fixing portion 20C with a large interval between the fixing portion main bodies 20Ca, and FIG. 6 (G) shows a fixing portion 20C with a small interval between the fixing portion main bodies 20Ca. (F) shows an intermediate fixing portion 20C in which the interval between the fixing portion main bodies 20Ca is narrower than the same interval in FIG. 6 (E) and wider than the same interval in FIG. 6 (G). In the silencer 1C according to the present embodiment, the user selects a fixing portion 20C that can obtain a desired sound volume from among the plurality of fixing portions 20C prepared, and is attached to the main body portion 10C. 6B shows a case where the fixing portion 20C shown in FIG. 6E is attached to the main body portion 10C, and FIG. 6C shows that the fixing portion 20C shown in FIG. 6F is attached to the main body portion 10C. FIG. 6D shows a case where the fixing portion 20C shown in FIG. 6G is attached to the main body portion 10C. Then, the user attaches the silencer 1C to the trumpet with the fixing portion 20C attached to the main body portion 10C.

消音器１Ｃを装着した場合、固定部２０Ｃの固定部本体２０Ｃａは、本体部１０Ｃとベルとの間を閉塞させる。ここで、各固定部本体２０Ｃａの間隔が広い固定部２０Ｃ（図６（Ｅ））を本体部１０Ｃに取り付けた消音器１Ｃ（図６（Ｂ））をトランペットに装着した場合、隣り合う固定部本体２０Ｃａとベース２０Ｃｂとベルとにより形成される隙間の断面積は大きくなる。従って、この場合、この隙間を通って消音器１Ｃ外に放音される音量は大きくなり、弱音の度合いは小さくなる。   When the silencer 1C is mounted, the fixing portion main body 20Ca of the fixing portion 20C closes the space between the main body portion 10C and the bell. Here, when the silencer 1C (FIG. 6 (B)) in which the fixing portions 20C (FIG. 6 (E)) having a large interval between the fixing portion main bodies 20Ca are attached to the main body portion 10C is attached to the trumpet, the adjacent fixing portions The cross-sectional area of the gap formed by the main body 20Ca, the base 20Cb, and the bell is increased. Therefore, in this case, the sound volume emitted from the silencer 1C through this gap increases, and the degree of weak sound decreases.

また、各固定部本体２０Ｃａの間隔が狭い固定部２０Ｃ（図６（Ｇ））を本体部１０Ｃに取り付けた消音器１Ｃ（図６（Ｄ））をトランペットに装着した場合、隣り合う固定部本体２０Ｃａとベース２０Ｃｂとベルとにより形成される隙間の断面積は小さくなる。従って、この場合、この隙間を通って消音器１Ｃ外に放音される音量は小さくなり、弱音の度合いは大きくなる。   In addition, when the silencer 1C (FIG. 6D) in which the fixing portions 20C (FIG. 6G) having a small interval between the fixing portion main bodies 20Ca are attached to the main body portion 10C is attached to the trumpet, adjacent fixing portion main bodies are mounted. The cross-sectional area of the gap formed by 20Ca, the base 20Cb, and the bell is reduced. Therefore, in this case, the sound volume emitted from the silencer 1C through this gap is reduced, and the degree of weak sound is increased.

また、各固定部本体２０Ｃａの間隔が中程度の固定部２０Ｃ（図６（Ｆ））を本体部１０Ｃに取り付けた消音器１Ｃ（図６（Ｃ））をトランペットに装着した場合、隣り合う固定部本体２０Ｃａとベース２０Ｃｂとベルとにより形成される隙間の断面積は、各固定部本体２０Ｃａの間隔が広い固定部２０Ｃを取り付けて装着したときの同隙間の断面積よりも小さく、各固定部本体２０Ｃａの間隔が狭い固定部２０Ｃを取り付けて装着したときの同隙間の断面積よりも大きい、中程度になる。従って、この場合、この隙間を通って消音器１Ｃ外に放音される音量は中程度になり、弱音の度合いは中程度になる。   In addition, when the silencer 1C (FIG. 6C) in which the fixing portions 20C (FIG. 6F) having a medium interval between the fixing portion main bodies 20Ca are attached to the main body portion 10C is attached to the trumpet, the adjacent fixing portions 20C are fixed. The cross-sectional area of the gap formed by the portion main body 20Ca, the base 20Cb, and the bell is smaller than the cross-sectional area of the gap when the fixing portion 20C having a wide interval between the fixing portion main bodies 20Ca is attached and mounted. The interval between the main bodies 20Ca is larger than the cross-sectional area of the same gap when the fixed portion 20C is attached and mounted. Therefore, in this case, the sound volume emitted from the silencer 1C through this gap is medium and the level of weak sound is medium.

放音される音量を変える場合は、固定部２０Ｃを付け換える。すなわち、本体部１０Ｃに取り付けられている固定部２０Ｃを取り外し、各固定部本体２０Ｃａの間隔が異なる他の固定部２０Ｃを選択し、新たに選択した固定部２０Ｃを本体部１０Ｃに取り付ける。その後、当該消音器１Ｃをトランペットに装着する。   When changing the sound volume to be emitted, the fixing unit 20C is replaced. That is, the fixing portion 20C attached to the main body portion 10C is removed, another fixing portion 20C having a different interval between the fixing portion main bodies 20Ca is selected, and the newly selected fixing portion 20C is attached to the main body portion 10C. Thereafter, the silencer 1C is attached to the trumpet.

このように、断面積可変手段として、各固定部本体２０Ｃａの間隔が異なる複数種の固定部２０Ｃが用意されている。そして、複数種の固定部２０Ｃの中から選択した固定部２０Ｃを本体部１０Ｃに取り付けることにより、ベル内の空間とベル外の空間とを連通させる隙間の断面積を変化させることができる。   As described above, a plurality of types of fixing portions 20C having different intervals between the fixing portion main bodies 20Ca are prepared as the sectional area variable means. Then, by attaching the fixing portion 20C selected from the plurality of types of fixing portions 20C to the main body portion 10C, the cross-sectional area of the gap that communicates the space inside the bell and the space outside the bell can be changed.

従って、本実施形態においても、第１実施形態と同様の効果を奏する。   Therefore, the present embodiment has the same effect as the first embodiment.

なお、図６では、３種類の固定部２０Ｃを示したが、固定部２０Ｃの種類はこれに限られない。固定部２０Ｃの種類を増やすことにより、ユーザは、放音される音量をより細かく調節することができるからである。   In addition, in FIG. 6, although three types of fixing | fixed part 20C was shown, the kind of fixing | fixed part 20C is not restricted to this. This is because the user can finely adjust the volume of sound emitted by increasing the types of the fixing unit 20C.

＜他の実施形態＞
以上、この発明の第１〜第４実施形態について説明したが、この発明には他にも実施形態が考えられる。例えば次の通りである。 <Other embodiments>
Although the first to fourth embodiments of the present invention have been described above, other embodiments are conceivable for the present invention. For example:

（１）上記各実施形態では、トランペット用の消音器１〜１Ｃを例に説明したが、トランペット以外の管楽器に用いる消音器においても同様な消音器を設計することができるのは勿論である。 (1) In the above embodiments, the trumpet silencers 1 to 1C have been described as examples, but it is needless to say that a similar silencer can be designed for a silencer used for a wind instrument other than the trumpet.

（２）第２実施形態による消音器１Ａでは、胴部１１Ａの小径側端１１Ａｂ近傍に回転しない第２固定部２０Ａ２が設けられており、その第２固定部２０Ａ２の大径側端１１Ａａ側に回転可能な第１固定部２０Ａ１が設けられていた。しかし、胴部１１Ａの小径側端１１Ａｂ近傍に回転可能な第１固定部２０Ａ１を設け、その第１固定部２０Ａ１の大径側端１１Ａａ側に回転しない第２固定部２０Ａ２を設けても良い。この態様においても、第２実施形態と同様の効果を奏する。 (2) In the silencer 1A according to the second embodiment, the second fixing portion 20A2 that does not rotate is provided in the vicinity of the small-diameter end 11Ab of the trunk portion 11A, and the second fixing portion 20A2 is on the large-diameter end 11Aa side. The 1st fixing | fixed part 20A1 which can rotate was provided. However, a rotatable first fixing portion 20A1 may be provided in the vicinity of the small-diameter end 11Ab of the trunk portion 11A, and a non-rotating second fixing portion 20A2 may be provided on the large-diameter end 11Aa side of the first fixing portion 20A1. In this aspect, the same effects as those of the second embodiment can be obtained.

（３）上記第３実施形態による消音器１Ｂの固定部２０Ｂは、筒状の伸縮部材２０Ｂｂの外壁に固定部本体２０Ｂａが固定されていた。しかし、固定部本体２０Ｂａの高さよりも低い高さの伸縮部材を固定部本体２０Ｂａの側面に固定するようにし、固定部本体２０Ｂａと伸縮部材とを交互に連結して、環状の固定部を形成しても良い。この態様においても、伸縮部材が胴部１１Ｂの軸周りの方向に伸縮することで各固定部本体２０Ｂの間隔が変わるため、第３実施形態と同様の効果を奏する。 (3) As for the fixing | fixed part 20B of the silencer 1B by the said 3rd Embodiment, the fixing | fixed part main body 20Ba was fixed to the outer wall of cylindrical expansion-contraction member 20Bb. However, an elastic member having a height lower than that of the fixing portion main body 20Ba is fixed to the side surface of the fixing portion main body 20Ba, and the fixing portion main body 20Ba and the elastic member are alternately connected to form an annular fixing portion. You may do it. Also in this aspect, since the space between the fixing portion main bodies 20B is changed by the expansion and contraction of the expansion / contraction member in the direction around the axis of the trunk portion 11B, the same effect as that of the third embodiment is achieved.

（４）上記第３実施形態による消音器１Ｂでは、伸縮する伸縮部材２０Ｂｂを用いてその内径を変えることにより胴部１１Ｂの軸方向に固定部２０Ｂを移動可能としていた。しかし、伸縮部材２０Ｂｂを設けずに、胴部１１Ｂの外壁上において胴部１１Ｂの軸方向に固定部本体２０Ｂａを移動可能としても良い。例えば、胴部１１Ｂの外壁上に胴部１１Ｂの前後方向に沿った窪みを設け、固定部本体２０Ｂａにその窪みに収容されてその窪みに沿って摺動可能な突起を設けるという態様が挙げられる。このような態様においても、固定部本体２０Ｂａを胴部２０Ｂａの軸方向に移動することができるため、第３実施形態と同様の効果を奏する。 (4) In the silencer 1B according to the third embodiment, the fixed portion 20B can be moved in the axial direction of the body portion 11B by changing the inner diameter using the expanding and contracting member 20Bb. However, the fixed portion main body 20Ba may be movable in the axial direction of the trunk portion 11B on the outer wall of the trunk portion 11B without providing the elastic member 20Bb. For example, the aspect which provides the hollow along the front-back direction of the trunk | drum 11B on the outer wall of the trunk | drum 11B, and is provided in the fixing | fixed part main body 20Ba in the hollow and the protrusion which can be slid along the hollow is mentioned. . Also in such an aspect, since the fixing portion main body 20Ba can be moved in the axial direction of the trunk portion 20Ba, the same effects as those of the third embodiment are achieved.

（５）上記第４実施形態による消音器１Ｃでは、面ファスナーを用いて固定部２０Ｃを本体部１０Ｃに取り付けていた。しかし、固定部２０Ｃを本体部１０Ｃに取り付ける手段は面ファスナーに限られない。本体部１０Ｃに対して固定部２０Ｃが着脱可能であれば良いからである。例えば、磁石により固定部２０Ｃを本体部１０Ｃに取り付けても良いし、突起と窪みによる嵌め合わせにより固定部２０Ｃを本体部１０Ｃに取り付けても良い。 (5) In the silencer 1C according to the fourth embodiment, the fixing portion 20C is attached to the main body portion 10C using a hook-and-loop fastener. However, the means for attaching the fixing portion 20C to the main body portion 10C is not limited to the hook-and-loop fastener. This is because the fixing portion 20C may be detachable from the main body portion 10C. For example, the fixing portion 20C may be attached to the main body portion 10C with a magnet, or the fixing portion 20C may be attached to the main body portion 10C by fitting with a protrusion and a recess.

（６）上記第４実施形態による消音器１Ｃでは、胴部１１Ｃの外壁に設けられた結合部４０Ｃに固定部２０Ｃを取り付けていた。しかし、固定部２０Ｃが固定されている小径側端１１Ｃｂ側の胴部１１Ｃ自体を本体部１０Ｃ（すなわち当該胴部１１Ｃの他の部分）から分離可能としても良い。この場合、固定部本体２０Ｃａの幅が異なる小径側端１１Ｃｂ側の胴部１１Ｃが複数用意される。そして、小径側端１１Ｃｂ側の胴部１１Ｃ自体を付け換えることにより放音される音量を調節する。この態様においても、第４実施形態と同様の効果を奏する。 (6) In the silencer 1C according to the fourth embodiment, the fixing portion 20C is attached to the coupling portion 40C provided on the outer wall of the trunk portion 11C. However, the trunk portion 11C itself on the small diameter side end 11Cb side to which the fixing portion 20C is fixed may be separable from the main body portion 10C (that is, another portion of the trunk portion 11C). In this case, a plurality of trunk portions 11C on the small diameter side end 11Cb side having different widths of the fixing portion main body 20Ca are prepared. The volume of sound emitted is adjusted by changing the body portion 11C itself on the small diameter side end 11Cb side. Also in this aspect, the same effect as that of the fourth embodiment is obtained.

１，１Ａ，１Ｂ，１Ｃ…消音器、１０，１０Ａ，１０Ｂ，１０Ｃ…本体部、１１，１１Ａ，１１Ｂ，１１Ｃ…胴部、１１ａ，１１Ａａ，１１Ｂａ，１１Ｃａ…大径側端、１１ｂ，１１Ａｂ，１１Ｂｂ，１１Ｃｂ…小径側端、１２…底部、１２ａ…湾曲部、１２ｂ…筒状部、１３，１４，１３Ａ…溝、１５…通常部、２０，２０Ａ，２０Ｂ，２０Ｃ…固定部、２０Ｂａ，２０Ｃａ…固定部本体、２０Ｂｂ…伸縮部材，２０Ｃｂ…ベース、２０Ａ１…第１固定部、２０Ａ２…第２固定部、２１…本体側部、２２…回転部材側部、２３…連結部、３０，３０Ａ…回転部材、３１…筒状部、３２…羽根部、４０Ｃ…結合部。   1, 1A, 1B, 1C ... silencer 10, 10A, 10B, 10C ... main body, 11, 11A, 11B, 11C ... trunk, 11a, 11Aa, 11Ba, 11Ca ... large diameter side end, 11b, 11Ab, 11Bb, 11Cb ... small diameter side end, 12 ... bottom part, 12a ... curved part, 12b ... cylindrical part, 13, 14, 13A ... groove, 15 ... normal part, 20, 20A, 20B, 20C ... fixed part, 20Ba, 20Ca ... fixed portion main body, 20Bb ... extensible member, 20Cb ... base, 20A1 ... first fixed portion, 20A2 ... second fixed portion, 21 ... main body side portion, 22 ... rotating member side portion, 23 ... connecting portion, 30, 30A ... Rotating member, 31 ... cylindrical part, 32 ... blade part, 40C ... coupling part.

Claims (3)

管楽器のベルに挿入される本体部と、
前記ベルに挿入された前記本体部と前記ベルの内壁との間に前記ベル内の空間と前記ベル外の空間とを連通させる隙間を一部形成しつつ、前記本体部と前記ベルとの間を閉塞させる固定部と、
前記隙間の断面積を変える断面積可変手段と、
を具備し、
前記断面積可変手段は、
前記本体部を内側に収容して前記本体部の軸周りの方向に回転可能な回転部材を有し、
前記固定部は、前記本体部の軸周りの方向に並んだ複数の部材であって、各々の間に前記隙間を形成する複数の部材により構成されており、
前記固定部の各部材は、
前記回転部材に固定される第１の固定部と、
前記本体部の外壁に固定される第２の固定部と、を有し、
前記第２の固定部に対して前記第１の固定部を前記本体部の軸周りの方向または前記本体部の軸方向に配置し、
前記固定部の各部材は、
前記第２の固定部に対して前記第１の固定部が前記本体部の軸周りの方向に配置されており、
伸縮自在な部材からなる伸縮部であって、前記本体部の軸周りの方向の一端において前記第１の固定部に接続され、かつ、他端において前記第２の固定部に接続された伸縮部をさらに有することを特徴とする消音器。 A main body inserted into the bell of the wind instrument,
Between the main body portion and the bell, a part of the gap between the main body portion inserted into the bell and the inner wall of the bell is communicated with the space inside the bell and the space outside the bell. A fixing part for closing,
A cross-sectional area variable means for changing a cross-sectional area of the gap;
Equipped with,
The cross-sectional area varying means is
A rotating member that accommodates the body portion inside and is rotatable in a direction around an axis of the body portion;
The fixing portion is a plurality of members arranged in a direction around the axis of the main body portion, and is configured by a plurality of members that form the gap between each of the fixing portions.
Each member of the fixed part is
A first fixing portion fixed to the rotating member;
A second fixing part fixed to the outer wall of the main body part,
The first fixing part is arranged in the direction around the axis of the main body part or the axial direction of the main body part with respect to the second fixing part,
Each member of the fixed part is
The first fixing part is arranged in a direction around the axis of the main body part with respect to the second fixing part;
A telescopic part made of a telescopic member, wherein the telescopic part is connected to the first fixed part at one end in the direction around the axis of the main body part and connected to the second fixed part at the other end. A muffler characterized by further comprising: 管楽器のベルに挿入される本体部と、A main body inserted into the bell of the wind instrument,
前記ベルに挿入された前記本体部と前記ベルの内壁との間に前記ベル内の空間と前記ベル外の空間とを連通させる隙間を一部形成しつつ、前記本体部と前記ベルとの間を閉塞させる固定部と、Between the main body portion and the bell, a part of the gap between the main body portion inserted into the bell and the inner wall of the bell is communicated with the space inside the bell and the space outside the bell. A fixing part for closing,
前記隙間の断面積を変える断面積可変手段と、A cross-sectional area variable means for changing a cross-sectional area of the gap;
を具備し、Comprising
前記固定部は、前記本体部の軸周りの方向に並んだ複数の部材であって、各々の間に前記隙間を形成する複数の部材により構成されており、The fixing portion is a plurality of members arranged in a direction around the axis of the main body portion, and is configured by a plurality of members that form the gap between each of the fixing portions.
前記断面積可変手段は、The cross-sectional area varying means is
伸縮自在な部材からなる伸縮部を有し、Has a stretchable part made of a stretchable member,
前記固定部の各部材間に前記伸縮部を設けたことを特徴とする消音器。A silencer characterized in that the expansion / contraction part is provided between the members of the fixing part. 管楽器のベルに挿入される本体部と、A main body inserted into the bell of the wind instrument,
前記ベルに挿入された前記本体部と前記ベルの内壁との間に前記ベル内の空間と前記ベル外の空間とを連通させる隙間を一部形成しつつ、前記本体部と前記ベルとの間を閉塞させる固定部と、Between the main body portion and the bell, a part of the gap between the main body portion inserted into the bell and the inner wall of the bell is communicated with the space inside the bell and the space outside the bell. A fixing part for closing,
前記隙間の断面積を変える断面積可変手段と、A cross-sectional area variable means for changing a cross-sectional area of the gap;
を具備し、Comprising
前記本体部は、前記本体部の外壁に前記本体部に対して前記固定部を着脱させるための結合部を有し、The main body has a coupling part for attaching and detaching the fixing part to the main body on the outer wall of the main body,
前記固定部は、The fixing part is
前記本体部の軸周りの方向に並んだ複数の固定部本体であって、各々の間に前記隙間を形成する複数の固定部本体と、A plurality of fixing portion main bodies arranged in a direction around the axis of the main body portion, and a plurality of fixing portion main bodies forming the gap therebetween,
前記固定部本体の各々を連結するベースと、A base for connecting each of the fixing portion main bodies;
前記本体部の前記結合部に対応する結合部と、を有し、A coupling portion corresponding to the coupling portion of the main body,
前記断面積可変手段として、前記固定部本体の各部材の間隔が異なる複数種の前記固定部が用意され、As the cross-sectional area varying means, a plurality of types of the fixing portions having different intervals between the members of the fixing portion main body are prepared,
複数種の前記固定部の中から選択した前記固定部を前記本体部に取り付けたことを特徴とする消音器。A muffler, wherein the fixing portion selected from a plurality of types of the fixing portions is attached to the main body portion.

JP2013212387A 2013-10-09 2013-10-09 Silencer Expired - Fee Related JP6255876B2 (en)

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